• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Fig. 1B machine voor de productie van 5 afstandhouders voor betonwapeningen en betonconstructies, werkwijzen voor het vervaardigen van dergelijke afstandhouders, en het gebruik ervan. The present invention relates to a FIG. 1A FIG. 1B machine for the production of spacers for concrete reinforcements and concrete structures, methods for manufacturing such spacers, and their use.
    公开号:BE1023042B1
    申请号:E2015/5620
    申请日:2015-10-05
    公开日:2016-11-10
    发明作者:Den Broecke Hugo Van；Piet Ocket
    申请人:Intersig Nv；
    IPC主号:
    专利说明:

    METHOD FOR THE PRODUCTION OF A DISTANCE TECHNICAL FIELD
    The present invention relates to a machine for the production of spacers for concrete reinforcements and concrete structures, methods for manufacturing such spacers, and their use.
    TECHNOLOGICAL BACKGROUND OF THE INVENTION
    Reinforcements for flat structures in reinforced concrete are usually formed from steel reinforcement nets. One or more reinforcement nets are often provided both at the top and at the bottom of the flat construction, so that both tensile and compressive forces can be absorbed optimally.
    During the construction, the reinforcement nets are generally kept at the desired distance from each other via spacers. Various types of spacers are produced.
    The production of the spacers is carried out with the help of a machine that is provided with separate wires and / or frame structures and transforms them fully automatically and fuses them into a spacer.
    During welding, wires can stick to parts of the machine, so production must be stopped. This "downtime" problem leads to higher production times and costs for spacers.
    The demand for accelerated production of increasingly lighter spacers has been growing in recent years. However, such a production also increases the chance of the wires sticking, which leads to even more "downtimes".
    So there is a need for new or adapted machines and new or adapted methods for manufacturing lighter spacers.
    SUMMARY
    The present invention relates to a machine for the production of spacers for concrete reinforcements and concrete structures, methods for manufacturing such spacers, and their use.
    In a first embodiment, the present invention relates to a machine for the production of spacers for concrete reinforcements and / or concrete structures, the spacers comprising three parallel straight longitudinal wires forming the sides of a triangular prism, each of the lower longitudinal wires being connected to the upper longitudinal wire via a frame structure, the machine further comprising: a. a welding installation for welding the two frame structures together on the upper longitudinal wire, and, optionally welding each of the frame structures together on a lower longitudinal wire, and; b. a drive mechanism for transporting the spacers through the welding installation; characterized in that the drive mechanism is positioned downstream of the welding installation.
    In a specific embodiment, the machine according to the present invention comprises a second drive mechanism, characterized in that the second drive mechanism is positioned upstream of the welding installation.
    In a specific embodiment of the machine according to the present invention, the drive mechanism comprises a system which clamps the wires during transport, preferably a mechanical gripping system such as a clamp.
    In a specific embodiment of the machine according to the present invention, the welding installation comprises one or more sets of electrodes, which weld the frame structures to the upper longitudinal wire, and, optionally, comprises one or more electrodes which weld each of the frame structures to a lower longitudinal wire.
    In a specific embodiment of the machine according to the present invention, the first drive mechanism is mechanically coupled to the second drive mechanism whereby the drive cycle of the drive mechanisms synchronizes, preferably by means of a mechanical connecting piece such as a rod, rod, pole, and / or the like.
    In a further embodiment of the machine, the first drive mechanism is electronically coupled to the second drive mechanism by means of an electronic connection which automatically synchronizes the drive cycle of the drive mechanisms.
    In a specific embodiment of the machine according to the present invention, the welding installation comprises one or more rotating circular support points which mechanically support the upper longitudinal wire during welding. The rotating circular support points preferably comprise a post which is height-adjustable.
    In a specific embodiment of the machine according to the present invention, the spacer has a wire diameter for the upper longitudinal wire, the lower longitudinal wires and the two frame structures of, respectively, less than 5 mm, less than 3 mm and less than 3 mm.
    In a second aspect the invention relates to a method for the production of spacers for concrete reinforcements and / or concrete constructions comprising the steps of: a. Transporting spacers (three longitudinal wires and two frame structures) through a welding installation, and; b. welding the upper longitudinal wire to the two frame structures in the welding plant, and, optionally welding each of the frame structures together to a lower longitudinal wire; wherein step (a) is done by a drive mechanism positioned downstream of the welding installation.
    In a specific embodiment of the method according to the present invention, the method for step (a) comprises a second drive mechanism which is positioned upstream of the welding installation.
    In a specific embodiment of the method according to the present invention, the method for step (a) comprises one or more drive mechanisms which clamp the spacers outside the welding installation, and subsequently mechanically transport them to the position of the next welding point.
    In a specific embodiment of the method according to the present invention, the method for step (a) comprises that the distance of the transport corresponds to the distance between the welding points or a multiple thereof.
    In a specific embodiment of the method according to the present invention, the method comprises that the upper longitudinal wire is supported during welding by one or more rotating circular support points.
    In a specific embodiment of the method according to the present invention, the method comprises that the spacer has a wire diameter for the upper longitudinal wire, the lower longitudinal wires and the two frame structures of, respectively, less than 5 mm, less than 3 mm and less than 3 mm.
    In a third aspect, the present invention deals in the use of a machine according to the present invention for the production of spacers.
    DESCRIPTION OF THE FIGURES FIGURE 1 is a schematic drawing of a specific embodiment of the machine (100) for the production of spacers (400). FIGURE 2 is a schematic drawing of a specific embodiment of the machine (101) for the production of spacers (400). FIGURE 3 is an illustration of the welding installation according to a specific embodiment of the machine (101) for the production of spacers (400).
    DETAILED DESCRIPTION
    As used further in this text, the singular forms "a", "the", "it" include both the singular and the plural form unless the context is clearly different.
    The terms "include", "includes" as used further are synonymous with "including", "include" or "contain," contains "and are inclusive or open and do not exclude additional, unnamed members, elements or method steps. When reference is made in this description to a product or process that includes certain features, components or steps, this refers to the possibility that other features, components or steps may also be present, but embodiments may also be provided that only have the listed features , parts or steps.
    The enumeration of numerical values based on numerical ranges includes all values and fractions in these ranges, as well as the cited endpoints.
    The term "about" as used when referring to a measurable value such as a parameter, a quantity, a duration, and so on, is intended to encompass variations of +/- 10% or less, preferably +/- 5% or less, more preferably +/- 1% or less, and even more preferably +/- 0.1% or less, from and from the specified value, as far as the variations apply to function in the disclosed invention. It is to be understood that the value to which the term "approximately" refers per se has also been disclosed.
    All references cited in this description are hereby incorporated by reference in their entirety.
    Unless defined otherwise, all terms disclosed in the invention, including technical and scientific terms, have the meaning that those skilled in the art usually understand. As a further guide, definitions are included for further explanation of terms used in the description of the invention.
    As intended herein, an object is "elongated" when the length of that object is longer than twice the width of that object, preferably the length is longer than three, four, or five times the width of the object.
    The term "perpendicular" as used herein may include a certain deviation from an exactly perpendicular orientation. More particularly, a first wire is considered to be perpendicular to a plane or second wire as the angle between the longitudinal axis of the first wire and the plane, or angle between the longitudinal axes of the first and second threads, is between 89 ° and 91 °, preferably between 89.5 ° and 90.5 °, and most preferably 90 °.
    The present invention relates to a machine for the production of spacers for concrete reinforcements and concrete structures, methods for manufacturing such spacers, and their use. The production of the spacers is accomplished by first providing the present machine with separate wires and / or frame structures that will form the skeleton structure of the spacers. More specifically, the machine is provided with at least three parallel longitudinal wires, including one upper longitudinal wire and two lower longitudinal wires, which form the sides of a triangular prism; In addition, at least two frame structures are provided, either in a desired pattern or in the form of straight longitudinal threads that are folded into a desired pattern.
    During production, each of the lower longitudinal wires is connected to the upper longitudinal wire via a frame structure placed on the outside or inside of the triangular prism formed. The connection between the longitudinal wires and frame structures is carried out by means of a welding installation that uses electrodes. During welding, the upper longitudinal wire and / or spacer can be further supported by means of a support point. After a connection is made, the machine will transport the longitudinal wire and / or spacer through the welding installation to enable a subsequent connection. This transport takes place by means of a drive mechanism which can push the wires further via a mechanical movement.
    During welding, there is a chance that a longitudinal wire will stick to certain parts of the machine, such as an electrode or the support point. When this happens with machines according to the state of the art, the drive mechanism will push the longitudinal wire through the welding installation, with the result that the longitudinal wire and / or spacer will (double) fold and / or tear loose.
    When bending the longitudinal thread and / or spacer, the machine must be stopped and, in the best case, the folded part can be straightened back so that production can resume; or, in the worst case scenario, the entire longitudinal wires / frame structures and / or spacers must be removed from the machine and punctured again. When the longitudinal thread and / or spacer is being torn off, the torn part must be removed so that the production of the spacer must restart. In both cases, production must be stopped (downtime), which leads to an increase in both the production times and the production costs of spacers.
    The chance of sticking increases as the diameter of the wires decreases, the production speed increases, the current to the electrode is increased, and / or when multiple electrodes are used. In recent years, however, the demand for accelerated production of increasingly lighter spacers has increased, which significantly increases the chance of the threads sticking to existing embodiments. The present invention includes a solution to reduce the chance of the longitudinal thread sticking to certain parts. If a longitudinal thread nevertheless sticks, the invention provides a solution to prevent (double) bending of the adhesive longitudinal thread and to release it more easily, whereby the chance of the adhesive longitudinal thread tearing off decreases and thus also the downtime of the production is significantly is limited. In addition, the invention also provides a solution for adapting the present machine to the production of spacers with different dimensions and / or diameters of the longitudinal wires / frame structures.
    By providing a drive mechanism downstream of the welding installation in the present invention, the longitudinal wires and / or spacers are pulled through the welding installation.
    As a result of the solution included, the envisaged invention in the present method provides for an improvement in both the production cost and the production speed of spacers. In addition, the use of the invention makes it possible to produce lighter spacers with a lower diameter of wires, which is very difficult with the prior art methods.
    The present invention provides in a first aspect a machine for the production of spacers for concrete reinforcements and / or concrete structures, the spacers comprising three parallel straight longitudinal wires forming the sides of a triangular prism, each of the lower longitudinal wires being connected to the upper longitudinal wire through a frame structure, the machine further comprising (a) a welding installation for welding the two frame structures together to the upper longitudinal wire, and, optionally welding each of the frame structures together to a lower longitudinal wire, and (b) a drive mechanism for transporting the spacers through the welding installation characterized in that the drive mechanism is positioned downstream of the welding installation.
    The term "machine" as used herein includes all terms wherein a device is composed of a frame, a drive mechanism, and all parts / systems necessary for the production of the spacers described herein. The machine is capable of converting a form of energy into a mechanical form of movement The machine comprises all systems necessary for supplying and converting energy for the use of the present machine.
    By the term "spacer" as used herein is meant in particular a construction for keeping two or more parallel concrete reinforcements, for example reinforcement nets for a flat construction, at a desired distance from each other. The flat construction can be a horizontal construction such as a floor or a standing structure such as a wall The spacers can be used, for example, to keep reinforcement nets at a distance in prefabricated (prefabricated) hollow walls Such walls typically comprise two prefab concrete peels, each concrete peel comprising a reinforcement net. held apart by one or more spacers, thereby creating a hollow wall that can be filled with concrete at the construction site.
    The spacer according to the present invention comprises three longitudinal threads, in particular two lower longitudinal threads and one upper longitudinal thread. The three longitudinal wires of the spacer each form a (longitudinal) end of a triangular prism. The term "triangular prism" as used herein refers to a longitudinal polyhedron, wherein the cross section perpendicular to the longitudinal axis forms a triangular geometry. In a specific embodiment, the longitudinal edges of said polyhedron are parallel to each other.
    Each of the two lower longitudinal wires is connected to the upper longitudinal wire via two or more frame structures.
    The frame structures ensure that the relative position of the longitudinal wires is confirmed so that the spacer can withstand stress from the outside, such as a bend. In the spacer according to the present invention, each frame structure comprises a wire connected to the lower longitudinal wire at N locations and to the upper longitudinal wire in N-1 and N + 1 locations, where N contains an integer greater than 1. In particular, N is equal to 2, 3, 4, 5, 6, 7, 8 or more. Each frame structure comprises a curved or curved wire; as a result, the entire frame structure comprises one or more curved portions.
    In a specific embodiment, the frame structure shows a zigzag shape, such as a sinusoid or sawtooth pattern, the frame structure being alternately connected to an upper and lower longitudinal wire at each bend and / or curvature.
    In a further embodiment, the frame structure shows a U-shaped bend or a V-shaped curvature, the upper longitudinal wire being connected to the curved or curved portion of the frame structure, and each of the lower longitudinal wires being connected to one of the ends of the frame structure. The longitudinal wires and frame structures are preferably made of steel. In certain embodiments, the wires are not smooth, but are, for example, provided with spiral ridges. This increases the surface area of the wires, so that the steel adheres better to the concrete. However, this is not a requirement, so that in certain embodiments, the wires can be smooth.
    The diameter of the longitudinal wires and frame structures is typically between 2.0 and 10.0 mm. In certain embodiments, the diameter of the longitudinal wires and frame structures is between 2.4 and 5.0 mm. In further embodiments of lighter spacers, the diameter of the longitudinal wires and frame structures is between 2.8 and 4.0 mm.
    A reduction in the diameter of the longitudinal wires and frame structures could provide a significant advantage due to a limitation in production material, which could potentially lower the production price of the spacers.
    An additional advantage of a reduction in diameters is that this makes the production of lighter spacers possible. As a result, the weight per meter of a spacer will decrease, creating the possibility of producing spacers with a larger maximum length. Both a reduction in weight and an increase in total length could reduce the transport and placement costs of the spacers.
    The upper longitudinal wire preferably has a diameter larger than that of the lower longitudinal wires and the frame structures. This would give an advantage to the stability of the support of the spacers.
    The lower longitudinal threads preferably have the same diameter, which may be the same or different from the diameter of the upper longitudinal thread. However, it is not excluded that in certain embodiments the lower longitudinal wires have a different diameter or thickness.
    The diameter of the frame structures can be identical to the diameter of the longitudinal wires, or different.
    The frame structures of the spacer generally all have the same diameter or thickness. However, it is not excluded that in certain embodiments the frame structures have a different diameter or thickness.
    The term "welding installation" as used herein encompasses all systems which, by means of a thermal process, result in a fusion of the longitudinal wire / frame structure provided as the basis for the skeleton structure of the spacers.
    In a preferred embodiment, the welding installation comprises one or more electrodes which weld the frame structures to the upper longitudinal wire, and, optionally, one or more electrodes which weld each of the frame structures to a lower longitudinal wire. In a specific embodiment, the welding installation comprises one or more electrodes which weld the frame structures to the upper longitudinal wire, and, one or more electrodes which weld each of the frame structures to a lower longitudinal wire.
    The system of a "drive mechanism" as used herein includes all systems in which a transport of the longitudinal wires / frame structures and / or spacer through the machine is effected by means of a mechanical movement. The terms drive mechanism and drive mechanism as used herein are synonymous with each other.
    The terms "upstream" and "downstream" as used herein refer to the direction of transport of the longitudinal wires / frame structures and / or spacer through the machine; wherein "upstream" refers to the direction and / or position in the opposite direction of the direction of transportation, and wherein "downstream" refers to the direction and / or position in the same direction of the direction of transportation.
    The drive mechanism transports the spacer further after each welding turn to the next welding point, the distance of the transport corresponding to the distance between the desired welding points, or a multiple thereof.
    The invention comprises in a first aspect a drive mechanism consisting of a carrier mechanism characterized in that the drive mechanism is positioned downstream of the welding installation.
    A drive mechanism positioned downstream of the welding installation has the consequence that the spacer is pulled through the welding installation. This has the advantage that if a longitudinal wire / frame structure continues to stick to an electrode and / or support during welding, it will not (double) fold, but rather be pulled away from the electrode and / or support. In contrast to the embodiments which are customary in the prior art, the chance of the possible folding of the longitudinal thread decreases significantly as a result.
    If the longitudinal wire / frame structure nevertheless sticks to the electrode, it can be loosened more easily due to the lack of a crease without necessarily restarting production. This has the great advantage that the "downtime" of the machine for the correction of the longitudinal wires and / or spacers can be limited, which in itself leads to an increased production efficiency of the machine.
    In a further embodiment, the drive mechanism consists of two drive mechanisms characterized in that the drive mechanisms are positioned both upstream and downstream of the welding installation to transport the wires through the welding installation.
    By making use of two drive mechanisms, the pressure and thus also the force on the transport of the wires is distributed over several points of attachment. This has the advantage that if a longitudinal wire continues to adhere to the electrodes during welding, it will be more easily pulled loose by the combination of several pressure points, which additionally reduces the chance of possible tearing of the wires.
    In a particular embodiment, the transport of one or more drive mechanisms would be transferred to the longitudinal wire and / or spacer via one or more mechanical gripping systems, preferably with a clamp, a catch finger, or a set of pressure wheels.
    The use of a clamp has the advantage that the chance of misunderstanding is very small. The use of a sturdy clamp reduces the chance of a possible extension over the surface of the spacer and / or longitudinal thread and the possible incorrect transfer of the transport distance.
    The machine according to the present invention as described herein provides a welding installation which comprises one or more electrodes, which weld the frame structures to the upper longitudinal wire, and, optionally, one or more electrodes which weld each of the frame structures to a lower longitudinal wire.
    The term "electrode" as part of the welding plant as used herein encompasses all structures where electrical energy is converted into thermal energy with the function of welding a longitudinal wire to a frame structure, and / or vice versa, both provided as a basis for the skeleton structure of the spacers.
    The term "set of electrodes" as used herein refers to a group of individual electrodes whose welding function is interconnected in one welding cycle.
    In a particular embodiment, a set of electrodes comprises two or more electrodes positioned on either side of the upper longitudinal wire to simultaneously weld the upper longitudinal wire to the frame structure on both sides.
    In a further embodiment, a set of electrodes comprises four or more electrodes of which two or more electrodes are positioned on either side of the upper longitudinal wire, and two or more electrodes are positioned on either side of each of the lower longitudinal wires; in addition, the lower electrodes can double-sided welding each of the lower longitudinal wires, or only single-sided welding, but are thereby supported by one or more elements disposed on the reverse side of the lower longitudinal wires to absorb the welding pressure. In a specific embodiment, the welding installation comprises one set of electrodes which is called a "single pass" or single pass system.
    In a specific embodiment, the welding installation comprises two sets of electrodes which is called a "double pass" or double pass system.
    In a specific embodiment, the welding installation comprises several sets of electrodes, which is called a "multiple pass" or multiple pass system.
    The use of an electrode has the advantage that the welding is carried out in an energy-efficient and accurate manner. The speed of welding here depends on the intensity of the power supply to the electrode, the resistance between the electrodes and the welding time. If the production speed of the machine needs to be increased, this can simply be done by increasing the current intensity or welding time to the electrode.
    The use of multiple electrodes in series ensures that multiple points can be welded simultaneously. This makes it possible to increase the transport distance to a multiple of the distance between the welding points, the multiple depending on the number of electrodes in series. This allows the production speed of the machine to be significantly increased.
    The machine according to the present invention provides that the first drive mechanism is coupled to the second drive mechanism whereby the operation of the drive mechanisms is synchronized.
    In a particular embodiment, the transport performed by the first drive mechanism would be mechanically coupled to the transport performed by the second drive mechanism. This coupling would preferably take place by means of a mechanical connecting piece, for example a rod.
    This would give the advantage that this invention is compatible with the mechanical parts of existing embodiments. Moreover, it would happen that the two drive mechanisms on the welding system have to be adjusted (electronically); instead, it is sufficient to adjust only one of two drive mechanisms to the welding system and then adjust the second drive mechanism to the first drive mechanism. This would further increase the compatibility of the invention with existing embodiments, and thus lower the adaptation costs.
    In a particular embodiment, the transport performed by the first drive mechanism would be electronically coupled to the transport performed by the second drive mechanism.
    An electronic synchronization could possibly work even more accurately than a mechanical synchronization. An electronic system could also deactivate both drive mechanisms more quickly if a welding problem (sticking) is found. For example, the sticking could also be recorded electronically.
    By using a synchronized system, the accuracy of the transport distance and the speed of production could also be further increased.
    The machine according to the present invention and as described herein further provides a welding installation which comprises one or more rotating circular support points which mechanically support the upper longitudinal wire during welding.
    The use of a support point has the advantage that the upper longitudinal wire will deform less under the influence of thermal stress as a result of the welding.
    In a specific preferred form, the upper longitudinal thread is supported by one or more rotating circular support points.
    The use of a rotating circular support point has the advantage that if a longitudinal wire sticks to the support point during welding, it will come loose more easily due to the rotating movement of the support point.
    On top of that, the rotary movement also reduces the chance of tearing off the sticky wires when they are transported forward by the drive mechanism.
    In a particular embodiment, the upper longitudinal wire is supported in series during welding by several rotating circular support points.
    The use of several support points gives a greater spread of the bearing surface and thus a further reduction of the chance of deformation of the longitudinal thread.
    The machine according to the present invention further provides that the rotating circular support points comprise a post which is adjustable in height.
    The ability to adjust the height gives the machine great flexibility in the choice of dimensions and / or diameter of the spacer. A different height of the upper longitudinal thread requires a different height of the support point. The correct height is necessary for optimum support of the longitudinal wire during welding.
    In a further embodiment, the machine as described herein comprises a creasing mechanism which is able to bend a straight longitudinal thread into a frame structure with a desired pattern.
    The advantage of a folding mechanism is that no separate supply of frame structures has to be provided. This would make an external machine for forming the frame structures superfluous.
    In a particular embodiment, the upper longitudinal wire is supported in series during welding by several rotating circular support points.
    The use of several support points gives a greater spread of the bearing surface and thus a further reduction of the chance of deformation of the longitudinal thread.
    In a specific embodiment, the machine as described herein provides that the spacer has a wire diameter for the upper longitudinal wire, the lower longitudinal wires and the two frame structures of, respectively, less than 5 mm, less than 3 mm and less than 3 mm and preferably 4 respectively mm, 2.8 mm and 2.8 mm and preferably even thinner.
    The invention comprises in a further aspect a method for manufacturing a spacer, for concrete reinforcements and / or concrete structures, comprising the steps of: (a) transporting spacers (three longitudinal wires and two frame structures) through a welding installation with a drive mechanism positioned downstream of the welding installation, and (b) welding the upper longitudinal wire to the two frame structures in the welding installation, and, optionally welding each of the frame structures together to a lower longitudinal wire; wherein step (a) is done by a drive mechanism positioned downstream of the welding installation.
    In a further embodiment the invention comprises a method for manufacturing a spacer, for concrete reinforcements and / or concrete constructions comprising the steps of: (a) transporting spacers (three longitudinal wires and two frame structures) through a welding installation with two drive mechanisms positioned as well as up-mounted as downstream of the welding installation, and (b) welding the upper longitudinal wire to the two frame structures in the welding installation.
    The method in which one or more drive mechanisms transfer the transport movement to the longitudinal wires and / or spacers is done by means of gripping systems. In a preferred method, a clamp grips the longitudinal wires and / or spacers and the longitudinal wires and / or spacers will be transported by means of a carrier mechanism. In the case of a drive mechanism positioned downstream of the welding installation, this will be done by a pulling movement; In the case of a drive mechanism positioned upstream of the welding installation, this will be done by a pushing movement.
    The method in which the transport distance is determined depends on the number of electrodes placed in series in the welding installation. When using one set of electrodes, the transport distance will correspond to the distance between two welding points, when using multiple sets of electrodes, the transport distance will correspond to a multiple X of the distance between two welding points, the multiple X depending on the number of electrodes in series; for example, when using two sets of electrodes, the multiple X will be two, and the transport distance will be twice the distance between two weld points, and so on.
    In a further aspect the invention comprises a method for welding the spacers with the aid of a rotating circular support that supports the upper longitudinal wire during welding by the electrodes.
    In a further aspect the invention comprises a method for adjusting the height of the support points on which the spacers are supported during welding.
    The invention comprises in a further aspect the use of a machine for the production of spacers for concrete reinforcements and concrete structures, comprising (a) a welding installation for welding the two frame structures together on the upper longitudinal wire, and, optionally welding together each of the frame structures on a lower longitudinal wire, and (b) a drive mechanism for transporting the spacers through the welding installation characterized in that the drive mechanism is positioned downstream of the welding installation.
    EXAMPLES
    Figure 1A is a schematic drawing of a specific embodiment of the machine (100) for the production of spacers (400) with provision of longitudinal wires (401) and frame structures (402). The machine (100) comprises a welding installation (200) which welds the products by means of one or more electrodes, while the longitudinal wire optionally rests on one or more support points (202), and a drive mechanism (300) for transporting the spacers through it the welding installation by means of a gripping mechanism (301) coupled to a carrier mechanism (302), characterized in that the drive mechanism is positioned downstream of the welding installation.
    Figure 1B is a schematic drawing of a specific embodiment of the machine (101) for the production of spacers (400) with provision of longitudinal wires (401) and frame structures (402). The machine (100) comprises a welding installation (200), a drive mechanism (300) for transporting the spacers by means of a pulling movement, characterized in that the drive mechanism is positioned downstream of the welding installation, and a drive mechanism (500) for transporting the spacers by means of a pushing movement, characterized in that the drive mechanism is positioned upstream of the welding installation.
    Figure 2 is an illustration of the welding installation according to a specific embodiment of the machine (101) for the production of spacers (400). Figure 2A (front view) and Figure 2B (side view) illustrate the welding installation (200) according to a specific embodiment of the machine for the production of spacers according to the present invention. In the welding installation (200), the longitudinal wires (401) are welded to the frame structures (402) by means of electrodes (201). The upper longitudinal thread is thereby supported by a rotating circular support point (202).
    权利要求:
    Claims (13)
    [1]
    CONCLUSIONS (retyped)
    A machine for the production of spacers for concrete reinforcements and / or concrete structures, the spacers comprising three parallel straight longitudinal wires forming the sides of a triangular prism, each of the lower longitudinal wires being connected to the upper longitudinal wire via a frame structure, the machine further comprising: a. a welding installation for welding the two frame structures together to the upper longitudinal wire, and, optionally, welding each of the frame structures together to a lower longitudinal wire, and; b. a drive mechanism for transporting the spacers through the welding installation; wherein the drive mechanism is positioned downstream of the welding installation; characterized in that the spacer has a wire diameter for the upper longitudinal wire, the lower longitudinal wires and the two frame structures of, respectively, less than 5 mm, less than 3 mm and less than 3 mm.
    [2]
    The machine according to claim 1, wherein the machine comprises a second drive mechanism, characterized in that the second drive mechanism is positioned upstream of the welding installation.
    [3]
    The machine according to claim 1 or 2, wherein the drive mechanism comprises a system which clamps the wires during transport, preferably a mechanical gripping system such as a clamp.
    [4]
    The machine according to any of claims 1 to 3, wherein the welding installation comprises one or more sets of electrodes, which welds the frame structures to the upper longitudinal wire, and, optionally comprises one or more electrodes which weld each of the frame structures to a lower longitudinal wire .
    [5]
    The machine according to any of claims 2 to 4, wherein the first drive mechanism is coupled to the second drive mechanism whereby the operation of the drive mechanisms synchronizes, preferably by means of a mechanical connecting piece such as a rod.
    [6]
    The machine according to any of claims 1 to 6, wherein the welding installation comprises one or more rotating circular support points which mechanically support the upper longitudinal wire during welding.
    [7]
    The machine of claim 7, wherein the rotating circular support points comprise a post which is height adjustable.
    [8]
    A method for the production of spacers for concrete reinforcements and / or concrete structures comprising the steps of: a. Transporting spacers (three longitudinal wires and two frame structures) through a welding installation, and; b. welding the upper longitudinal wire to the two frame structures in the welding plant, and, optionally welding each of the frame structures together to a lower longitudinal wire; wherein step (a) is done by a drive mechanism positioned downstream of the welding installation; characterized in that the spacer has a wire diameter for the upper longitudinal wire, the lower longitudinal wires and the two frame structures of, respectively, less than 5 mm, less than 3 mm and less than 3 mm ..
    [9]
    A method according to claim 8, wherein before step (a) a second drive mechanism is positioned upstream of the welding installation.
    [10]
    A method according to claim 8 or 9, wherein before step (a) one or more drive mechanisms clamp the spacers outside the welding installation, and then mechanically transport them to the position of the next welding point.
    [11]
    A method according to claim 8 or 10, wherein before step (a) the distance of the transport corresponds to the distance between the welding points or a multiple thereof.
    [12]
    A method according to any of claims 8 to 11, wherein the upper longitudinal wire is supported during welding by one or more rotating circular support points.
    [13]
    The use of a machine for the production of spacers according to any of claims 1 to 7.
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    PCT/IB2016/055918| WO2017060808A1|2015-10-05|2016-10-04|Method and machine for producing a spacer|
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