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    • 专利摘要:

    公开号:BE1020315A3
    申请号:E2010/0578
    申请日:2010-09-30
    公开日:2013-08-06
    发明作者:Bart Vervoort；Peter Geboes
    申请人:Soudal；
    IPC主号:
    专利说明:

    Improved click-and-fix link
    SCOPE OF THE INVENTION
    The present invention relates to containers, cans or cans containing a pressurized substance, more specifically disposable cans, and which can be coupled to a spraying device, for example a spray gun, for applying the substance. The substance may contain one or more active components, and may be suitable, for example, to form a sealant (e.g., a silicone paste), a polyurethane (PU) foam, or a one or two component adhesive. The invention relates more specifically to improvements in the pieces that form the coupling between the container and the spraying device, and / or the container with a suitable hand-operated applicator.
    BACKGROUND OF THE INVENTION
    Containers under pressure, containing substances such as pastas, foams or adhesives, are increasingly being used in the construction industry as well as in DIY (DIY) applications. These containers are usually disposable containers. Two types of applicators are generally used within the current application. Occasional and DIY users generally prefer a simple hand-operated applicator, usually also disposable, which is typically screwed onto the stem of the container valve and usually includes a tube or tube for guiding the flow of the substance to its intended location, and a tilt adapter or lever. Such hand-operated applicators are characterized in that they themselves do not comprise a valve for stopping or controlling the flow of the substance, but act on the valve provided on the container for these purposes. As a result, any substance that has passed through the container valve and has entered the hand-operated applicator is exposed to the atmosphere and, if sensitive to this, can further react and be converted to its final and usually fixed consistency. For these reasons, these applicators are simple in terms of design and production, inexpensive, but usually only usable once, and therefore disposable. Typically, an operation on the tilt adapter or handle provided as part of the manual applicator results in a tilting or pushing down of the stem of the container valve, such as in its surrounding rubber seal or grommet in the case of a conventional valve, relative to of the valve plate, such that one or more openings in the valve stem are released in the contents of the container, the container valve being opened. The assembly is such that the user can hold the container while pushing in the tilt adapter, which provides imprecise means for controlling and dosing the flow of the substance. US patent 4165825 describes suitable hand valves for such applications. However, dosing the substance with such manual control systems is quite inaccurate, and such a system is therefore more suitable for filling large gaps or cavities, such as those wider than 2 cm.
    The more intensive users, such as professionals or more experienced DIY users, typically prefer a more sophisticated sprayer, ·. such as a spray gun, for applying the substance. With such sprayers, the user holds and manipulates the foam spraying device or spray gun with the dust container attached to the spray gun. Such spray guns are characterized in that they comprise their own valve, preferably a needle valve for higher precision and better closure, for stopping or controlling the flow of the substance, and this valve is usually located at the tip of the barrel of the gun and is much more sophisticated than the container valve. Typically, this valve allows a better control of the dust flow compared to the container valve. Because this valve is located at the tip of the barrel, little or no volume of the substance exposed to the atmosphere remains after use and can react and harden. The substance inside the spray gun remains under pressure and sealed from the atmosphere, with the exception of the short time required to change the container on the spray gun. This time is usually short, and the spray gun is typically reused immediately after changing, so that the substance inside the spray gun is refreshed and after use, this new substance remains under pressure and fresh in its liquid state. These spray guns are usually more complex and expensive and are typically reused several times after replacing the previous empty container with a fresh and full one. The use of these spray guns is more comfortable for the user, and allows a higher precision and a better dosage when applying the fabric than the manual control system. Spray guns are therefore preferred for filling in smaller slits, such as those smaller than 2 cm wide. The higher dosing precision makes it possible to work with less excess of dust, which usually has to be removed later and ends up as waste. This reduces the amount of aftercare that is needed and brings a higher efficiency in the use of materials. Both these advantages are of great importance for the professional or intensive user.
    Containers intended for the intensive user are conventionally provided for this purpose with a first coupling piece, usually made of a plastic material, which makes the container suitable for attachment to the spray gun or spray device, and which fits together with a connecting element integrated in the spray device or spray gun. or with a second connector attached to the sprayer or spray gun, also referred to as a gun adapter, usually made of metal, such as aluminum or bronze, for making the connection to the sprayer or spray gun. A suitable foam spray gun is described, for example, in US patent 5,271,537, wherein the device comprises a screw connection into which a container can be screwed which has a suitable screw connection, usually by means of a suitable coupling piece on the container.
    This screw connection or first coupling piece typically surrounds the valve that closes the container. The screw coupling is usually provided such that, when the screw connection is established, usually by manually tightening the screw until the stop position is reached, at the same time the valve of the container is brought into the open position and flow of the substance into the container is made possible from the container in the spray gun, where it can be stopped and / or controlled by the valve in the spray gun. For this purpose, a central internal extension is usually provided on the spray gun, or as part of the second connector or gun adapter, which cooperates with the container valve stem and pushes the valve stem down into the open position, whereby at the same time usually a seal is also provided around the stem of the container valve such that the substance is only allowed to flow through the spray gun via the boHrip> IHp> channel an alka wriina / a / an Hp ctnf nn nnnpwpnüt Inratipc where the X "wv N · * ss ^ 1 1 WI»% W iUm «WfcWI wf /. Ww v. W, * ..w» is supposed to contaminate the connectors or sprayer. Such a screw coupling has a multitude of of full turns required in multiple steps of manual operations to establish the coupling, and this is time consuming for the intensive user and can lead to an unintentional waste of the substance.
    WO 98/43894 describes a rotatably connecting, alternative bayonet type coupling system for such an assembly of a container and a spray gun. This system is generally referred to as a "click-and-fix" system and brings the advantage over the screw connection that the coupling is established in a maximum of one turn, preferably in less than one full turn, and preferably in only half a turn or even about a quarter of a turn, and thus in a much shorter time. The coupling can preferably be closed in a single smooth movement. In this system, the two coupling pieces are preferably made of plastic such as nylon 6 or polypropylene, and optionally a fiber-reinforced plastic. This coupling system is much simpler and faster to use, and requires fewer user operations compared to the different turns required to achieve the above-discussed screw coupling. Due to the fact that the coupling is closed so quickly, there is a reduced risk of accidental or unintentional leakage of the contents of the container, which may end up on the spray gun or on the second connector, thus reducing the risk of spray gun or the coupling piece must be cleaned before a new container can be mounted on it. These benefits are particularly useful, especially for the intensive user.
    It should be noted that in all of these designs, the first coupling piece must be firmly attached to the container because the connection must withstand the force required to open the valve as well as the force carried out by the pressurized contents of the container of the spray gun when the valve is opened. It must also withstand the torsional force when the connection is established.
    As it is offered commercially with its contents under pressure, the container or canister intended for use with the spray gun is typically different from the container for use in manual operation, e.g. for use with a manual operator applicator. The container for professional use is thus usually provided with a first coupling piece which is so strongly attached to the container that its removal, which would be necessary to allow the attachment of the hand-operated device for use in hand-operated, would require an extremely strong force of the typical occasional or DIY user. It would also lead to unsafe situations, eg creating a risk of accidental tearing of the valve. As a result, the supply chain maintains two types of container, supplied with different designs, one intended for use with the spray gun, and the other for use with the manual applicator.
    The containers themselves are typically made of metal and are cylindrical in shape. The bottom is usually formed by a plate that is flanged on the cylinder and is typically concave to better withstand internal pressure while still retaining the ability of the container to stand on a flat surface. The tip is usually provided with a container head, also flanged on the cylinder, and which is typically convex for the same reason of higher pressure resistance. A filling opening is usually provided centrally in the cylinder head. When preparing the container for sale, the empty container is typically filled with the substance through this central filling opening in the head, which can then be closed by flipping the container valve into the filling opening. Many substances can be filled into the container under atmospheric pressure, and a higher pressure can then be built up or introduced into the container, usually after it has been sealed as described. An example in which pressure is built up after closing the container are the substances for polyurethane foam, more specifically the one-component foam (OCF), in which, after filling the container, an exothermic chemical reaction between the substances can be initiated, such as by shaking the container, and the reaction produces heat and builds up pressure through the production and / or evaporation of propellants. Propellants for building up the pressure can also be introduced at the time of filling of the container, such as a cold liquid which is then allowed to evaporate after the container is closed.
    We have found that the valve plate, ie the metal part of the container valve that is flanged on the container head and that may support the valve stem, or the rubber grommet through which the typical plastic stem of the conventional valve protrudes, can be pushed outwards when the pressure builds up inside the container, especially when the exothermic reaction also temporarily raises the temperature. This may cause the valve stem to move away from its initial position. We have also found that the distance over which the valve stem can be moved can vary from container to container, and that this distance is difficult to predict since it depends on, among other things, the internal pressure in the can. This entails the consequence that the valve stem position can be different from the expected position and is no longer optimal for when the coupling must be established. This repositioning of the valve over an unpredictable distance can thus influence the opening of the valve when the coupling between the container and the spray gun is made, such that when the coupling is closed, the valve does not always reach a desired degree of opening, or cannot even open at all, or conversely, can open the valve too early and cause an accidental waste of the substance. Both the screw coupling and the click-and-fix coupling can have this problem, and we have found that a click-and-fix coupling can be somewhat more sensitive, more specifically the smaller the rotational movement that is chosen to fully connect the two connectors.
    This problem of valve repositioning can be avoided by placing the first coupling piece of the click-and-fix coupling system on the container before the pressure is built up inside the container, and by providing the first coupling piece with an internal edge ( also called a "support ring") which, upon attachment of the first coupling piece to the container, acts on the wontiolrvlaat -yrwHamn Hat He x / antiplQfppl nn 7Nn place wnrHt nfihoildpn Despite some increased pressure inside the container. WO 98/43894 describes a click-and-fix coupling system, the first coupling piece of which is provided with such an internal edge for holding the valve plate, and thereby also the valve stem, at its initial position.
    The containers of the present invention can, under pressure, contain substances that are still highly reactive and react after the substance has been applied to its final location, such as in a slit or on a substrate. Contact of the contents of the container with the skin, or more importantly with the eyes, should therefore be avoided. For safety reasons, the containers that are ready for sale are therefore always provided with a protective casing, which must shield the container valve and more specifically the valve stem against damage, tearing or contact, and shifting relative to the valve plate, and therefore for safety reasons and for protection against accidental waste. The containers for use in manual operation are typically provided without a coupling piece, i.e. with the valve fully accessible. Therefore, such containers are conventionally provided with a separate shielding cap that is usually snapped onto the flange around the container. The containers for professional use are provided with the first coupling piece clicked on the flange around the valve plate, and with the click & fix system also also clicked on the flange around the container head, as explained in WO98 / 43894, which provides additional strength. Access to the valve stem by these first coupling pieces is then typically closed by means of a separate shielding cap, which can for instance click on the upper edge of the coupling piece, which can be adapted in a suitable manner for snap-fitting of the cap, such as by providing from a small collar.
    Separate caps have been designed, and the heads of the connectors on the containers can be made suitable to accept these caps as closures for the valve compartment. This design requires the individual production of a cap and requires an additional step in the assembly of the container, i.e., placing the cap on the crown of the container.
    This protective cap thus forms an additional element that must be produced separately and must be assembled with the coupling piece before or after the coupling piece clicks onto the container. The protective cap for the container intended for use in manual operation also forms a separate assembly element. These shielding caps therefore form an additional burden in the supply chain of the containers, in the sense that there is a need to supply two types of containers and an additional assembly element must be provided and assembled for both types.
    There is therefore a need for a two-in-one design, ie a container that would be suitable for use with a applicator gun as well as a hand-operated applicator, and / or a hand-operated applicator that would be suitable for use with the container assembly intended for use with the spray gun.
    WO 2007/112758 describes a hand-operated applicator that can be attached to the valve stem of a container intended for use with the sprayer. The manual applicator can then be "clicked" directly onto the valve stem. The difficulty with this design is that the application of the manual applicator to or from the valve stem must be carried out very carefully, since some tilting of the valve would cause premature and unintended waste of the substance, and any damage to the valve would pose a safety risk can create.
    US 2007/0181610 A1 describes a hand-operated applicator suitable for being clicked on the flange around the container valve. The disadvantage with this proposal is that the first coupling piece, with which a container for use with a spray gun is usually sold, must be removed from the container before the flange is available for clicking on the manual applicator. The difficulties and security problems of such removal were discussed above.
    Other systems have been developed where a manual actuator can be screwed into a threaded internal section of the coupler intended for the sprayer. The difficulty with such problems is that the valve opens when the applicator is screwed into place, and the degree of screws defines the opening of the valve and thus the flow of the fabric. Occasional users in particular prefer to use both hands for screwing on the applicator, and it is very difficult to achieve a good and precise application of the fabric during screwing on of the applicator.
    Improved couplers were also designed for attachment to the container, with an integrated cap provided to be manually broken off from the coupler, and to provide access to the container valve upon removal. In some versions these integrated caps are made in such a way that the cap, after it has been broken off, can be replaced on the coupling piece, such that the valve compartment can be closed again, such that a partially used container can be transported and made safe and conventional stored before being used again. Improved connectors with these characteristics were designed so that they can be produced as a single product in a single production step such as by a single injection molding step. However, the design of an adapter with integrated cap for single-step production is incompatible with the provision of an internal edge, also called "support ring", which is desired to provide additional and external support to the valve plate such that the valve stem is in place held when the pressure inside the container builds up, such as a part of the click-and-fix system described in WO 98/43894.
    Therefore, there remains the need for an improved connector, for attachment to a container, which is provided with an integrated cap and also with internal legs that provide external support for the container valve plate, and which can be produced as a single product in a single production step. There remains a further need for a twpp-in-one nntwprn ip ρρπ knnnplstnk Hat tp7plfdprtiid provides the ability to connect the container with a suitable hand-operated applicator without first having to remove the coupling piece, which may only open the valve after the manual-operated applicator is coupled was attached to the connector and the container.
    The present invention has for its object to provide for avoiding or at least alleviating the above described problem and / or general improvements.
    SUMMARY OF THE INVENTION
    According to the invention an improved coupling piece is provided, an assembly of the coupling piece with a container containing a substance, an apparatus comprising the assembly and a spray gun for applying the substance, as well as a process for the production of the coupling piece, of the assembly and of the device as defined in one of the accompanying claims.
    The invention thus provides a first coupling piece for attachment to a container, wherein the coupling piece is rotatably connectable to a second coupling piece provided for attachment to a spray gun for mounting a component present in the container, wherein the two coupling pieces together provide a coupling between the container and the spray gun, wherein the container comprises a valve to close the container, wherein the container valve comprises a valve plate and is provided to be opened during the establishment of the coupling, one of the two coupling pieces being provided with a the conductor and the other coupling piece are provided with a protrusion for cooperating with this conductor, which protrusion is movable within this conductor between a first position and a second position, in no more than one full 360 degree turn, the first position corresponding to an uncoupled state of the coupling and a closed pos of the container valve, and the second position corresponds to a coupled state of the coupling and an opened position of the container valve, characterized in that the pprstp comprises a piece of equipment provided for being manually broken down and to be necessarily removed in order to enable the coupling to be established, (ii) the first coupling piece comprises one or more internal support legs (6) which provide an internal edge or sections with an internal edge to act on the container valve plate when the first coupling piece meets the container is attached, (iii) wherein the integrated cap is provided with open segments and (iv) wherein the area covered by a first projection, of the open segments in the cap and made along the axis of rotation of the coupling and on a plane perpendicular on this axis of rotation, comprises the area covered by a second projection made along the same axis and on the same plane, of the internal surfaces of the internal support legs, which face the axis of rotation.
    The connector according to the invention provides the combined advantages that (a) it has an integrated cap for shielding the valve from the container to which it is intended to be connected, (b) it provides external support for the container valve plate such that the container valve stem is held in place when the pressure inside the container increases after attachment of the connector to the container, and (c) the connector can be produced as a single product in a single production step, such as by injection molding. In addition, the coupling piece according to the present invention still corresponds to the "click-and-fix" second coupling piece for attachment to the spray gun.
    The invention further provides an assembly of a container with the first coupling piece according to the present invention. This assembly entails the advantage that the position of the container valve stem relative to the coupling piece is maintained even when the pressure inside the container was increased. This results in a more correct valve opening after the establishment or removal of Hp knnnplinn tnsspn dp twpp cone pieces thus reducing the risk w. . »W. . · ~ ·· - - rI ----------------------- I "I ------------» avoiding an insufficient , or vice versa from a premature valve opening.
    In another embodiment, the invention provides a process for producing the connector according to the present invention, comprising an injection molding step. The first coupling piece according to the invention can be produced as a single product in a single production step, with a mold designed for that purpose, and which can comprise a plurality of mold elements that are capable of cooperating to produce the first coupling piece mold with the integrated cap and internal support legs for supporting the container valve plate of the container to which it will be attached or attached.
    In a preferred embodiment, the coupling piece of the present invention further comprises first means suitable for coupling with a suitable hand-operated applicator for applying the component present in the container, which hand-operated applicator is provided with second complementary cooperating means for providing the coupling between the first coupling piece and the hand-operated applicator, and is adapted to bring about, in an assembly of the container and the first coupling-piece together with the hand-operated applicator, the opening of the valve by an action on the hand-operated applicator.
    This embodiment entails the advantage that the coupling piece has a dual function, ie it can be used in combination with the second coupling piece for an application comprising an applicator or a spray gun, such as for intensive use by, for example, a professional or intensive DIY user. or for narrower gaps, cavities or cracks, but at the same time it is also suitable for use in manual control, with a suitable manual control applicator, such as for less intensive use or for larger gaps, cavities or cracks. This entails the considerable advantage that the supply chain must maintain only one type of product, ie the assembly of a full container with the coupling piece according to this I / I / Aorinnewnrm to ToWnonrlo rlo Kohooffon / on rlo + * too oohruiUün r f txmoe UIIV WVI IIIV ^ OVUI lil, Will Ä-WWWWI iww ww WW II ww I l WII dirty ww ivvww ^ wui UIINWI I want to satisfy users.
    For the details of a hand-operated applicator suitable to be coupled to the first connector according to the present invention, or to its assembly with a container, the applicants refer to the pending patent application with reference 8025110 to the same agent.
    The invention further provides for the use of the connector or assembly of the present invention with a hand-operated applicator suitable for use in hand-operated.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Figure 1 shows a top perspective view of a first coupling piece according to the present invention, ready to be clicked on the container.
    Figure 2 shows a bottom perspective view of the coupling piece of Figure 1.
    Figure 3 shows a top perspective view of the same connector, now with the cap torn off, in an exploded view, and rotated 90 ° about a vertical axis, ready to be placed back on the connector.
    Figure 4 shows a top perspective view of the same coupling piece from Figure 3, without the cap and from a position that gives a better view of the interior of the coupling piece.
    Figure 5 shows a bottom perspective view of the situation in Figure 3.
    Figure 6 shows a perspective view of half of the same connector as in Figures 1 to 5, with the cap broken off and ready to be attached back to the connector, the assembly being cut in the middle through the central axis of symmetry of the connector and through the center of the outer lip (the so-called "click") to seal the coupling with the second coupling piece.
    Figure 7 shows a complete top view of the first button mpt r | p npïntpnrpprrp Hnn afnphrnkpn pn vprwiiriprr) • * "'rr ...... * ------— —r - z> ------ --- - · - ”'j — r · - ·
    Figure 8 shows a cross section through the central axis of symmetry of the coupling piece and perpendicular to the cutting plane of Figure 6, of the first coupling piece of Figure 6 clicked on a container closed with a valve (the stem of which is not shown in full detail , nor any seal) and with the cap placed back on the coupling piece.
    DETAILED DESCRIPTION
    The containers for pressurized fabrics are typically designed as cylinders. The bottom is usually closed off by flanging a concave bottom plate on the cylinder. The top of the cylinder is typically sealed by flipping over a convex head plate, with a central opening therein through which the container can be filled with its contents. As already explained above, this opening can be closed after filling by a valve through which the container contents can be released using the pressure built up inside the container. At room temperature, the pressure inside a filled container is typically around 5 bar overpressure. The containers are typically able to remain intact up to an overpressure of 18 bar, and are designed to not burst open up to an overpressure below 21.6 bar. The container valve is typically designed to withstand overpressure up to at least 22 bar. Other containers exist, which are only able to remain intact up to an overpressure of 12 or 15 bar. The container valve usually comprises a valve plate, i.e., a round metal cup that can be flanged or shrunk around its circumference in the central filling opening of the container, optionally using a rubber seal. In the conventional valve design, the valve plate supports a central rubber seal or grommet through which a generally plastic valve stem extends. The stem is sturdy and typically has a central channel that turns sideways, just before the stem ends at its lowest end in a blind flange, in one or more, typically four, side openings. The valve can be opened by tilting the stem or by sliding it down
    HrnlçUon wan Ha ctaoj rojgtiof na ^ jon ton QpZIChtS wgn Ho SfcÜChtinCJ Or Γθ! 3ίΐθί seen with respect to the valve plate, and wherein at least one of the side openings in the valve stem becomes available for the container contents.
    Because the rubber of the seal or grommet of the conventional valve, especially if carbon powder is used as filler in the rubber, allows diffusion of water, which can then react with various substances in the container to form a sticky solid, it has conventional valve the disadvantage that the valve stem can be blocked over time, or when the container has remained in a horizontal position for a certain time. A further disadvantage is that the rubber of the seal also permits diffusion of propellant gases from the container, such that the container can lose all its pressure after a while. For these reasons, other types of valves have been designed that do not include a rubber seal. Such container valves may also be known as "feststof valves," and suitable variants thereof are described, for example, in WO 2009/004097, US 5,014,887, WO 03/062092, or United States patents 5,215,225, 5,549,226 and 6,058,960. These valves no longer have a rubber seal or grommet, or only have a seal or grommet on the outer part of the valve that is not in contact with the contents of the container, but still have a valve plate and a stem. always subject to internal pressure deformation inside the container.These valves are typically provided with a sealing section on the outside of the valve stem, suitable for forming a seal when brought into contact with a gun adapter, a spray gun, or a manual applicator .
    The first coupling piece according to the present invention is rotatably connectable to a second coupling piece as part of an assembly as described in WO 98/43894. This second coupling piece is provided with a conductor, typically two conductors, preferably two grooves on opposite sides of the second coupling piece. The first coupling piece is then preferably provided with a protrusion, typically two protrusions, and preferably two pins which are attached to the pinch of the pinch pin. w. . * ~. · _ R r w. w v w,. , w. ,, w ~ ... w ..
    to work with the guide or grooves provided in the second coupling piece, the protrusion being movable within the guide between a first position and a second position, in no more than one full 360 degree turn, the first position corresponding to an uncoupled state of the coupling and, if the first coupling piece is attached to a container comprising a valve for closing the container, a closed position of the valve, and the second position corresponding to a coupled state of the coupling and corresponding to an opened position of the valve. We prefer that the coupling can be made with no more than a half or 180 degree turn, and preferably with no more than a quarter or 90 degree turn.
    With such a composition, the coupling can be established in one continuous movement, the container valve being simultaneously opened in one continuous movement. Because the action time exerted on the valve is short, the risk of leakage of the valve during the establishment of the coupling is very small. Such a continuous movement in a single turn, therefore, allows to minimize leakage of the valve during the establishment of the coupling. The coupling can also be made smooth in one continuous and short movement, which is time-saving and very handy for the user, more specifically for an intensive user such as a professional.
    Furthermore, according to the present invention, the first and second coupling pieces are provided with means for locking said coupling. This is advantageous since it provides a means for preventing the release of the coupling in case the container contains a pressurized substance. In the alternative of the screw connection discussed above, this is achieved by allowing the threads to cooperate with each other over a plurality of turns, resulting in the disadvantages already mentioned above.
    The means for locking the coupling are preferably reversible, so that the coupling can be reused several times, i.e. re-opened and closed again, and this several times. It also makes it possible to replace an empty container with another with the first coupling piece attached to it.
    Furthermore, according to the present invention, the means for locking the coupling preferably comprise a snap lock. Such a snap lock is typically locked automatically when the coupling is established.
    The protrusion and conductor according to the invention preferably comprise at least one pin-and-groove connection.
    With such a pin and groove connection, the coupling can be established in one short movement. A large tolerance can be provided in this case, so as to simplify the insertion of the pin into the groove, without opening the valve and creating a risk of leakage of the valve. The valve is only effectively opened with the movement of the pin in the groove when the coupling piece provided for attachment to the spray gun acts on and exerts an action on the container valve.
    The pin-and-groove connection preferably comprises two diametrically opposed pins, and two diametrically opposed grooves, which grooves are provided to cooperate with the pins, thus preventing the coupling pieces from being produced of the coupling could be tilted with respect to each other.
    The first connector according to the present invention is provided for attachment to the container, preferably comprising means for attaching the connector to the collar or flange where the container valve plate connects to the container head, usually by being "shrunk" on the container head , more preferably on the flange connecting the container head to the cylinder, and even more preferably comprising means for attaching or attaching the coupling piece to these two flanges.
    In the alternative of the screw connection described above, the connector for attachment to the container is typically attached to the flange of the valve plate with the
    rnn + oinorl / An ΓΜ + Krannt hot norlanl rv »o + * 7Ir * h maa Hot hût 7ûûr mnciitiik Iran UV / I II & 4IIIOI Owl tlWl IIUUV / VI II IUI A-IUI I i I IVV UUl I IWl« .WVI IIIVl. I WI I
    are often impossible to unscrew the coupling. It may further happen that, when the coupling is screwed on or off, when some force is exerted on the coupling piece, the coupling can move with respect to the container, sliding around on the valve plate. This can happen, for example, when the thread has previously been firmly attached, or when a portion of the substance from the container has soiled the thread and can behave as an adhesive. This can result in a coupling that cannot be disconnected, such that the second coupling piece or even the spray gun becomes useless and must be discarded.
    By attaching the coupling piece to the two flanges, as is possible with the coupling piece of a preferred embodiment of the present invention, the contact surface between the coupling piece and the container can be increased considerably. The increased contact surface results in an increased frictional resistance such that a higher moment must be overcome to allow the coupling piece to move relative to the container. This provides an improved attachment of the coupling piece to the container, and helps prevent the coupling piece from being movable with respect to the container. This also results in a lower number of rejections of used second connectors.
    In an embodiment of the present invention, the first coupling piece is made of a plastic or plastic material, and can be provided with fibrous reinforcing material. The coupling piece is preferably made from polyamide (PA), for example from nylon 6, or polypropylene (PP). Other suitable materials are high density polyethylene (HDPE), polycarbonate (PC) or acrylonitrile butadiene styrene rubber (ABS), or blends of one of the mentioned materials. Preferably, the second coupling piece is also made from a similar or identical construction material. This entails the advantage that the intrinsic resilience of the plastic material is useful for locking and unlocking the snap lock.
    In one embodiment of the present invention, the larger of the two projections in (iv) preferably extends at most 2 mm, more preferably at most 1 mm outside the perimeter of the smaller projection. More preferably, the two projections overlap as completely and precisely as possible, with a small tolerance of at most 0.6 mm, preferably at most 0.4 mm, more preferably at most 0.2 mm and even more preferably at most 0, 1 mm. This entails the combined advantage that the shielding effect of the valve cap can be maximized, while at the same time the contacting area of the internal edge of the first coupling piece, or the sections of such an internal edge, with the valve plate can also be are maximized, while maintaining the ability to produce the connector as a single product in a single production step.
    In an embodiment of the present invention, the cap comprises an outer ring and a central piece that extends along one diameter. The outer ring of the cap accommodates a plurality of weak connections between the cap and the connector and which can be formed in the single production step. This cap design also allows two segments in the cap to be left open within the outer ring and on both sides of the central piece extending over the round cap along one diameter, whereby parts of the mold, preferably a single part of the mold that is, the part or parts intended to form the internal surfaces of one or preferably two internal support legs back out of position or move their position taken during the injection molding step, and thus can simply release the produced coupling piece after the injection molding step. The internal legs thus preferably provide two sections with an internal edge for acting on the valve plate. Applicants have found that this embodiment is one possible way in which the sections of the internal edge together comprise at least 30%, preferably at least 35%, more preferably at least 40%, more preferably at least 45 and most preferably 50% provided with the full circle internal border such as the one provided in the conventional design as described in WO 98/43894. Applicants have found that two sections which together provide such a portion with a full circle internal edge provide sufficient external support to the valve plate to secure the valve stem in its desired position.
    In one embodiment of the present invention, the connector is further provided with at least one first element and the integrated cap is provided with at least one second element to cooperate with the first element to removably reconnect the cap and / or to replace the cap reseal on the first coupler, ie to attach the cap to the first coupler after it has been broken off from the coupler. This makes the cap a resealable cap. This feature brings the advantage that the valve compartment can be resealed with the cap between successive uses of the same container. In a preferred embodiment the coupling piece is provided with at least two such first elements and the cap is provided with at least two such second elements, which brings the advantage of at least two points of attachment for the cap on the coupling piece, which means a stronger attachment of the cap provides a lower risk of inadvertent release of the cap. In a preferred embodiment, the cap is provided with two male elements, such as a cylindrical snap-in leg. which extend downwards, and the coupling piece is provided with two female elements, such as corresponding sleeves, wherein the legs and the sleeves are provided for cooperating such that the legs can be removably inserted into the sleeves and cooperate sufficiently to fit the cap to keep its place. We prefer to have the male elements protrude downwards from below the central part of the cap, and wherein the sleeves are provided as a part of the internal legs of the first coupling piece which provide the sections with the internal edge for cooperating with the valve plate. This brings the advantage that these elements can be formed at the same time as the first coupling piece including its integrated cap, and that the complete coupling piece can be made in a single production step, such as an injection molding step. After the cap of the coupling piece is broken off, the elements can be provided such that they match and are able to cooperate when the cap is rotated, such as about the axis of symmetry of the coupling piece, through an angle such as about 90 °, from its original position.
    Rii vnnrkpur hppft Hp Hnn ppn lin nf hpnHpl / nnr hpf ~ "J. W w... W w. WW wwr WW .. r W. ..W..WW. .WW.
    simplifying the handling of the cap, such as manually breaking the cap from its integrated position on the coupling piece and / or removing the cap from its resealed position.
    In the preferred embodiment in which the coupling piece was further provided with the first means suitable for coupling with the suitable hand-operated applicator, we prefer that the two means suitable for providing a coupling between the coupling piece and the hand-operated applicator comprise a conductor and at least one protrusion for cooperating with the guide, preferably a pin-and-groove connection, said protrusion being movable within the guide between a first position and a second position, in no more than one full 360 degree turn, the first position corresponds to an uncoupled state of the coupling between the connector and the hand-operated applicator and a closed position of the container valve, and the second position corresponds to a coupled state of the coupling between the connector and the hand-operated applicator and a position of the container valve that is closed and ready to be opened d by the action on the manual applicator. In this embodiment, the connector has two functions and can also serve for use in manual operation as described above. We prefer that the coupling with the manual applicator can be made with no more than half a or 180 degree turn, and preferably with no more than a quarter or 90 degree turn.
    With such an additional feature, the coupling with the hand-operated applicator can be established in one continuous and short movement that is time-saving and very convenient for the user.
    The protrusion and guide for coupling to the hand-held applicator according to the present invention preferably comprise at least one pin-and-groove connection. With such a pin and groove connection, the coupling can be established in one short movement. A large tolerance can be provided, in order to simplify the insertion of the pin into the groove. We prefer that the groove or rjo grnowan a broader © openincj hsbbsn vvssrin enter the pin must, and that run more towards their end or stop point. This makes it easier to obtain a correct position of the pin or pins upon insertion into their respective groove, but at the same time to ensure that the coupled position of the two pieces is as accurate as desired.
    The pin and groove connection preferably comprises two diametrically opposed pins, and two diametrically opposed grooves, the grooves being provided to cooperate with the pins. This reduces the risk that the manual applicator, when coupled to the first coupling piece, would inadvertently tilt or push the valve stem down with respect to the rubber seal or grommet, and cause an unintentional opening of the valve.
    In one embodiment, we prefer that the first means suitable for providing a coupling between the coupling piece and the manual applicator include two protrusions internally on the coupling piece and located diametrically opposite each other with respect to the position of the container valve in the assembly of the container, the first coupling piece and the hand-operated applicator, preferably the first means comprise two pins to cooperate with two grooves in the hand-operated applicator.
    Hand-operated applicators suitable to be coupled to the first connector according to the present invention, including the specific embodiments thereof preferred by the applicants, are fully described in the pending patent application with reference 8025110 to the same agent. Applicants refer to that document for further details, preferred features and their various advantages.
    In another embodiment of the present invention, the connector is further provided with an external flat surface, and preferably the external flat surface is provided on the integrated cap. This ΚγλπλΙ Κλ + »ιλλι · / 4λλΙ τιλ ^ rv * nn rl <—i + Uni l / nnnnlofi rl / ΛηΛίΛηοΙ / Ι Uon» »ιαγγΙλπ υι ^ ιι ^ ι I ici vwu i lidi i vici i vuu i lidi i vici vwu i lidi i by means of a vacuum applied by a suction cup which engages the external flat surface provided on the coupling piece, preferably on the integrated cap, and the coupling piece can be released again by releasing the vacuum. break after the coupling piece has been brought into a position on the container which position is suitable for the coupling piece to be clicked on the container. This external flat and smooth surface allows a very convenient method of contacting the coupling piece with a container before clicking the piece onto the container and producing the assembly of the two parts.
    The coupling piece according to the present invention is preferably provided with a plurality of stabilizing pins suitable for stabilizing the position of the coupling piece on the container and / or the container head before it can be clicked on the container. This makes it better to better hold the connector in the correct position to snap onto the flange or flanges of the container and / or valve plate, as explained above. We prefer to provide these stabilizing pins as weak downwardly extending extensions of the support legs, and which are sufficiently weak such that they collapse when the first coupling piece is pressed onto the container. In this way, the pins provide additional contact surface and a resistive force on the valve plate against an internal build-up of pressure.
    In another embodiment, the coupling piece according to the present invention is preferably further provided with a plurality of stabilizing stubs, to act on the flange of the container head with the cylinder, in addition to the conventional projecting edges, to be provided over at least one and preferably grab both flanges. Such stabilizing stubs eventually create additional contact surface with the container, which reinforces the adhesion to the container as compared to just having the collars or projecting edges that are conventionally provided for securing the adhesion. Thus, the stabilizing stubs further stabilize the position of the coupling piece on the container after krtl λλ i * J λ ΛΛηΙηίηΛΡ 1 a (λ nnl / lil / + uci υρ uc na h ις Ι vvciu ycr nr i.
    The process for producing the connector according to the present invention preferably comprises a single injection molding step. The mold can be formed, for example, by using at least four matching mold pieces, preferably only four mold pieces. Two of these jigs preferably cooperate with each other by approaching one another in the direction of the axis of rotation of the coupling, and can then together form the inside, including the internal support legs, of the jig and the cap, one jig can limit the upper surface of the cap and, through the open segments in the cap, can also limit the internal surfaces of the support legs that face the axis of rotation. The second and cooperating template can suitably border the lower surface of the parts of the cap located between the open segments in the cap, as well as the lower surfaces of the rest of the coupling including some peripheral edge and some opening and click edge that can be provided in the inner side of the peripheral edge. The third and fourth template can then cooperate to define the side surfaces of the connector, to form the protrusions or guide necessary for establishing the coupling, the lip that can be provided as part of the cap, the lip or the snap lock that can be provided on the peripheral edge of the coupling piece for locking the coupling, and the at least one weak connection between the cap and the coupling piece.
    In the process according to the present invention, the mold can therefore comprise at least 4 parts which are able to move relative to each other, preferably perpendicular and / or parallel to each other, as suitable, for closing and opening the mold.
    In a preferred embodiment, the process further comprises the step of assembling the first coupling piece with a container.
    In this embodiment, we prefer that the first coupling piece be picked up by means of a vacuum applied by a suction cup that engages the external flat surface that is preferably provided on the coupling piece, more preferably on the integrated cap, and can are released by breaking the vacuum after the coupling piece has been brought into a position on the container, which position is suitable for the coupling piece to be clicked on the container.
    In the assembly according to the present invention comprising a container and a first coupling piece, the container may comprise a composition suitable for forming a silicone paste, a polyurethane (PU) foam, or an adhesive.
    The assembly according to the present invention may further comprise a hand-operated applicator, such as those described in the also pending patent application with reference 8025110 to the same agent. Alternatively, the assembly may further comprise the second coupling piece or the gun adapter of the click-and-fix coupling system, for coupling the container with a spray gun, and then further may comprise a spray gun suitable for applying the component or substance present in the container. This second coupling piece or gun adapter is preferably the same as described in WO 98/43894.
    A preferred embodiment of the first coupling piece according to the present invention is shown in the accompanying drawings, in which like elements are designated by the same numerical reference.
    In Figure 1, a first coupling piece 1 is shown as produced in a single step by injection molding. Figure 1 shows one of the two pins 4 intended to be received in a groove provided in the second coupling piece (not shown). Another similar pin 4 is present at the rear of the coupling piece 1, and opposite to the pin 4 shown in Figure 1. The coupling piece 1 in Figure 1 is shown with its integrated cap 5 in the position in which the coupling piece leaves the mold from the injection molding machine. The cap 5 is provided with an outer ring and a central piece that runs along one diameter, thus creating two open segments 8. The cap 5 is further provided with a flat external surface 16 and with a lever lip 28, also called the cap lip. Furthermore, in Figure 1 the lip or click 25 is provided which is provided for hot hontaran wgn hot cut. VOOT with the second coupling piece, as in the method described in WO 98/43894.
    In Figure 2 the same coupling piece 1 is shown from a bottom perspective. The lip or click 25 of the snap lock is clearly visible. Only a small outer part of cap 5 is visible, as is one of two cylindrical snap-in legs 11 protruding downwards from below the central part of the cap. Figure 2 also shows the two internal support legs 6 for acting on the valve plate of the container. Furthermore, Figure 2 shows various weak stabilizing pins and stabilizing stubs 20 (not all with reference) for stabilizing the position of the coupling piece 1 on top of a container before it can be clicked on and for reinforcing the attachment of the coupling piece to the container against torsional force.
    In the top perspective view provided in Figure 3, the cap 5 is broken off from the rest of the coupling piece 1 and is shown in an exploded position. Visible are the two open segments 8 in the cap, the flat top surface 16 and one of the snap-in legs 11 of the cap. On the main part of the coupling piece 1, one of the pins 4 and the lip 25 is again visible. Furthermore, two pins 15 are seen, internally on the connector, for effecting the coupling with a suitable manual applicator (not shown) in a manner fully described in the copending patent application with reference 8025110 to the same agent. Also shown is the upper portion of an internal support leg 6 and one of the two sleeves 10 for inserting the snap-in legs 11 of the cap.
    Figure 4 shows a higher perspective view of the coupling piece 1 without the cap 5. Shown are the lip or click 25, now two pins 4 for the click-and-fix coupling with a second coupling piece, an almost complete view of one internal support leg 6 and a sleeve 10, and also two internal pins 15 opposite to each other for coupling to the manual applicator as described above.
    In Figure 5, the cap 5 is shown in a torn and exploded position, rotated 90 degrees such that the θΠΘΠθΠΘΠθΠΘΠ 11 iϋΐΖΘΠuθΠ (i i ((iïï y y g g gCCC g gC g g g gϋΐΖΘΠ g g g g g g g g g g g g g koppel g en g koppel koppel enϋΐΖΘΠ en koppel en en en en en koppel en en enϋΐΖΘΠ en en en en koppel enΠΠΘΓ koppel en en enϋΐΖΘΠ en en en enϋΐΖΘΠ en en en en en en en en en en en enϋΐΖΘΠ en en enϋΐΖΘΠ en en en en ϋΐΖΘΠ en en en en en en en en en en en en en en en en en en en en en en en en en en to reclose on the connector. Also shown are lip 25, one pin 4, and various weak stabilizing pins and stabilizing stubs 20 as part of the connector, and the open segments 8 as part of the cap.
    In the cross-sectional perspective view in Figure 6 of the connector 1 with the cap 5 ready to be replaced, one open segment 8 is shown and a part of the flat and smooth external surface 16 on the cap, two legs 11 of the cap ready to to be inserted into two cooperating sleeves 10 provided in the coupling piece itself, which are provided as part of the internal support legs 6. Further shown are one pin 15 internally in the coupling piece, a number of weak stabilizing pins 20 as part of the supporting legs 6 and stabilizing stubs 20 as part of the connector body, and the clip or snap of the snap lock.
    In the plan view in Figure 7 of coupling piece 1 with the integrated cap broken off, the lip 25, the two pins 4, and the two internal pins 15 are also shown. The plan view provides a complete plan view of the internal support legs 6 in which the sleeves or sleeves 10 are integrated. The plane of the drawing in Figure 7 is a plane perpendicular to the axis of rotation of the coupling of the first coupling piece to the second coupling piece, which axis traverses the plane of Figure 7 at the center of coupling piece 1. Of the internal support legs 6 are thus clearly visible the projections of the internal surfaces thereof which are directed to the axis of rotation and are made according to or along this axis of rotation. This projection is fully covered according to the present invention with a very small tolerance in a projection of the open segments 8 in the cap 5 (not shown) made along or along the same axis and on the same plane of the drawing in Figure 7.
    Figure 8 shows a part of the cross-section of an assembly of the coupling piece 1 with a container 2 including its valve 3 with a valve plate 7. The cap was broken off from its original position integrated with the coupling piece, and was replaced on the coupling piece to reapply the close the valve compartment. The cap is therefore in the + / λIη λλπ ηη ^ ίΙ ^ οηΙ / ΛΐιιΙ / onrlorr in iy yciuui iu αιο i ji iciii icii ii <^ njr wujcui, 11 it I ut uvvai ouuui oi ic uc αι lut ^ i o shaded than that of the connector body. The cross-section cuts through the open segments 8 in the cap, and the upper portion of one snap-in leg 11 can also be noticed, clicked into a cooperating sleeve or sleeve 10. The cross-section shown in Figure 8 also cuts through the two opposite internal pins 15 which are provided for coupling to the manual applicator and also by the two external pins 4 which are provided for coupling to the second coupling piece or gun adapter. The cross-section shown in Figure 8 further cuts through two of the stabilizing stubs 20 cooperating with the flange connecting the container head 9 to the container cylinder 2, and the attachment of the coupling piece 1 to this flange was further conventionally fastened with protruding edge 26 which is in the collar of the flange is snapped. Similarly, the cross-section cuts through protruding edge 27 that is snapped into the collar or flange connecting the valve plate 7 to the container head 9, as with any "shrink valve", i.e., either a conventional or a so-called "feststof valve." Also visible is one internal support leg 6 behind the valve 3, which acts on the valve plate 7.
    Now that this invention has been fully described, those skilled in the art will realize that the invention can be practiced within a wide range of parameters within what is claimed, without therefore departing from the spirit and scope of the invention. As understood by those skilled in the art, the general invention, as defined by the claims, includes other preferred embodiments that are not specifically mentioned.
    权利要求:
    Claims (18)
    [1]
    A first coupling piece (1) for attachment to a container (2), the coupling piece being rotatably connectable to a second coupling piece, provided for attachment to a spray gun for mounting a component present in the container, the two coupling pieces together a coupling provided between the container and the spray gun, wherein the container comprises a valve (3) to close the container, wherein the container valve comprises a valve plate (7) and is provided to be opened during the establishment of the coupling wherein one of the two coupling pieces is provided with a guide and the other coupling piece is provided with a protrusion (4) for cooperating with this conductor, which protrusion is movable within this conductor between a first position and a second position, not more than one full 360 degree turn, the first position corresponding to an uncoupled state of the coupling and a closed position of the container valve, and the second position corresponds to a coupled state of the coupling and an opened position of the container valve, characterized in that (i) the first coupling piece comprises an integrated cap (5) provided to be broken off manually and to be necessary have to be removed in order to enable the coupling to be established, (ii) the first coupling piece comprises one or more internal support legs (6) which provide an internal edge or sections with an internal edge to act on the container valve plate (7) when the first coupling piece is attached to the container, (iii) wherein the integrated cap is provided with open segments (8) and (iv) with the area covered by a first projection, of the open segments in the cap and made along the rotation axis of the coupling and on a plane perpendicular to this axis of rotation, comprises the area covered by a second projection made along the same axis and on same plane, of the internal surfaces of the internal support legs, which face the axis of rotation.
    [2]
    The coupling piece according to claim 1, further provided with at least one first element (10) and wherein the integrated cap is provided with at least one second element (11), the second element being provided for cooperation with the first element in order to be able to detachably attach the cap (5) to the first coupling piece (1) after it has been broken off from the coupling piece.
    [3]
    The coupling piece according to claim 1 or 2, which is further provided with first means (15) suitable for coupling with a hand-operated applicator for applying the component present in the container, which hand-operated applicator is provided with second complementary cooperating means for providing of the coupling between the first coupling piece (1) and the hand-operated applicator, and is suitable, in an assembly of the container and the first coupling-piece together with the hand-operated applicator, to open the valve (3) through a action on the manual applicator.
    [4]
    The coupling piece according to claim 3, wherein the two means suitable for providing a coupling between the coupling piece and the manual applicator comprise a conductor and at least one protrusion (15) for cooperating with the conductor, preferably a pin and groove connection, which protrusion is movable within the conductor between a first position and a second position, in no more than one full 360 degree turn, the first position corresponding to an uncoupled state of the coupling between the coupling piece and the manual applicator, and a closed position of the container valve, and the second position corresponds to a coupled state of the coupling between the connector and the hand-operated applicator and a position of the container valve (3) that is closed and ready to be opened by the action on the hand-operated applicator.
    [5]
    The coupling piece according to claim 3 or 4, wherein the first means (15) suitable for providing a coupling between the coupling piece and the manual applicator include two protrusions (15) internally on the coupling piece and which are diametrically opposite each other with respect to the position of the container valve (3) in the assembly of the container (2), the first coupling piece (1) and the manual control applicator, preferably the first means comprise two pins (15) for cooperating with two grooves in the manual control applicator.
    [6]
    The coupling piece according to any of the preceding claims, further provided with an external flat surface (16), wherein the external flat surface (16) is preferably provided on the integrated cap (5).
    [7]
    The coupling piece according to any one of the preceding claims, further provided with a plurality of stabilizing pins and / or stubs (20) suitable for stabilizing the position of the coupling piece (1) on the container (2) and / or the container head for and / or after being clicked on the container.
    [8]
    The coupling piece according to claim 7, wherein the stabilizing pins (20) are provided as weak pins to act on the collar or flange where the valve plate (7) connects to the container head (9), more preferably on the flange of the container head (9) with the cylinder (2), and even more preferably on these both flanges, and / or to grip over at least one and preferably both of these flanges.
    [9]
    The coupling piece according to any of the preceding claims made from polyamide (PA), for example nylon 6, polypropylene (PP), high density polyethylene (HDPE), polycarbonate (PC) or acrylonitrile butadiene styrene rubber (ABS), or mixtures thereof .
    [10]
    An assembly of a container (2) and the first coupling piece (1) according to any one of the preceding claims.
    [11]
    The assembly of claim 10, wherein the container comprises a composition suitable for forming a silicone paste, a polyurethane (PU) foam, or an adhesive.
    [12]
    The assembly of claim 10 or 11 further comprising a manual actuator.
    [13]
    The assembly according to claim 10 or 11 further comprising the second coupling piece and the spray gun suitable for applying the component present in the container.
    [14]
    A process for the production of the coupling piece (1) according to any one of claims 1 to 9, comprising the step of injection molding.
    [15]
    The process according to claim 14, wherein the mold comprises at least 4 parts that can move relative to each other, preferably perpendicular and / or parallel to each other, as it is suitable, for closing and opening the mold at preferably only four parts.
    [16]
    The process according to any of claims 14 or 15 further comprising the step of assembling the coupling piece (1) with a container (2).
    [17]
    The process according to claim 16 wherein the coupling piece (1) is picked up by means of a vacuum applied by a suction cup which acts on the external flat surface (16) provided on the coupling piece (1). preferably on the integrated cap (5). and the coupling piece (1) is released again by breaking the vacuum after the coupling piece has been brought into a position on the container (2), which position is suitable for the coupling piece (1) to be clicked on the container (2) .
    [18]
    Use of the coupling piece according to any of the preceding claims 1 to 9 or the assembly according to any of the claims 10 to 12 with a hand-operated applicator suitable for use in manual operation.
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    同族专利:
    公开号 | 公开日
    WO2011151296A3|2013-01-17|
    US20130167977A1|2013-07-04|
    RU2012157569A|2014-07-20|
    ES2401702T3|2013-04-23|
    RU2577704C2|2016-03-20|
    EP2392407B1|2012-12-26|
    PL2392407T3|2013-05-31|
    WO2011151296A2|2011-12-08|
    US9181073B2|2015-11-10|
    EP2392407A1|2011-12-07|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP10164927|2010-06-04|
    EP10164927A|EP2392407B1|2010-06-04|2010-06-04|Click-and-fix coupling piece for interchangeable dispensing tools|
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