• 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:
    The invention relates to methods for corrugating an embroidery base (11) in a gate (1) of an embroidery machine between an upper winding shaft (7) and a lower winding shaft and for laterally tensioning the embroidery base (11) along the side edges of the embroidery machine (7) Embroidery base (11) with side tensioning strips (10), each of which comprises an encircling chain with pin cushions arranged on its chain links. The invention is characterized in that before the start of the corrugation, the needle cushions located laterally from the area of the embroidery base (11) with the last stitches of the embroidery pattern in engagement with the embroidery base (11) are clamped in relation to the frame of the embroidery machine and the pincushions and thus the clamped embroidery base (11) are clamped in place and held tight during the corrugation.
    公开号:CH715412A2
    申请号:CH00439/19
    申请日:2019-04-02
    公开日:2020-04-15
    发明作者:Lässer Franz；Nussbaumer Hanno
    申请人:Laesser Ag；
    IPC主号:
    专利说明:

    The invention relates to a method for corrugating an embroidery base between two winding shafts arranged in parallel on a large embroidery machine according to the preamble of claim 1.The invention further relates to a system for clamping the material for the embroidery base according to the preamble of patent claim 11.The invention further relates to an embroidery machine creel according to the preamble of patent claim 16.
    In order that embroidery panels can be embroidered as an embroidery base that are wider than the height of an embroidery machine gate of a large embroidery machine, gate arrangements are known from EP 0 919 657 and EP 0 690 164 B1, in which the embroidery base is between a lower and an upper one Shaft is stretched or corrugated and after embroidering a first embroiderable surface spanned between the waves, the embroidery base is rolled up or rippled from one shaft to the other, so that the area adjacent to the already embroidered area is unwound from the lower shaft into the embroiderable area comes to lie between the waves.Before embroidery begins on a newly added embroidery base in the embroidery area, the embroidery base is advantageously corrugated several times from one wave to the other, thereby balancing and aligning the tension and alignment of the weft and warp threads. So that the embroidery base is evenly stretched across its entire width at the start of embroidery, it is fastened by hand on both sides to a side tensioning bar and then the side tensioning bars are stretched horizontally across the tensioning direction between the shafts, also horizontally in the warp direction and finally through the waves, in a vertical direction Direction, ie tightened in the direction of the shot.
    In embroidery machines with a gate, which a shift of the embroidery floor by winding the embroidered area on the upper shaft and unwinding from unembroidered embroidery floor. of the lower shaft, for a displacement of the embroidery base, this is released from the side tension bars, then the displacement, i.e. the waves were made to finally hang the embroidery base back into the side tension bars. It is hardly possible to restore the lateral tension after the corrugation in accordance with the tension before the displacement. As a result, there are shifts in the embroidery pattern where the one embroidery stage ends and the subsequent embroidery stage begins, especially in the lateral areas of the embroidery base, which affect the quality of the entire embroidery.
    [0004] EP 0 919 657 B1 discloses a method for shifting, also called waves, one with two side tensioning strips laterally tensioned with the embroidery base that can be moved translationally in the gate on an embroidery machine gate with an upper and a lower winding shaft, in which method the on Winding waves corrugated embroidery base is stretched flat between these and is shifted by waves from one winding shaft to the other relative to the gate, while it is suspended in the spines of the side tension bars, so that at least part of the embroidery base remains tensioned during the displacement of the side tension bars which can be translated in the gate to have the same tension in this part after the displacement as before the displacement. During the displacement, the embroidery base is lifted from the thorns, which engage in the embroidery base, with a surface of a release device that runs obliquely to the embroidery base level, and is thereby detached from the side tension bars. In the method, at least a part of the embroidery base remains tensioned by the side tension bars during the displacement in order to have the same tension in this part after the displacement as before the displacement. The area adjacent to the transition between the stages expediently remains tensioned, so that the tension in the embroidery base remains constant during the transition and the transition is therefore invisibly integrated into the embroidery pattern. It is imperative that the embroidery base is detached from the side tension bars over a length corresponding to the displacement in order to be able to wind it on the winding shaft. After or during the displacement, the part of the embroidery base which is not tensioned by the side tension bars is advantageously re-tensioned on the side tension bars in accordance with the tension of the part which has remained tensioned, e.g. by manually hanging the embroidery base into the mandrels of the side tensioning strips, taking into account the thread course of the vertical weft thread. The embroidery base can be tensioned by hand or with a tensioning device activated by the displacement. The embroidery base is held in the vertical direction during the movement of the gate so that the embroidery base can stand still relative to the needles. This can be achieved with the fabric pressers, which fix the embroidery base relative to the needles.In the case of an embroidery machine creel according to EP 0 919 657 B1 for stretching an embroidery base, with a device for displacing the embroidery base relative to the creel and on both sides with a side tensioning strip for laterally tensioning the embroidery bottom, the side tensioning strips are advantageously translationally movable in the creel so that they move laterally when the stick is moved move the tensioned embroidery floor and so at least a part of the embroidery floor remains tensioned during and after the movement. For this purpose, the side tension bars are divided into segments, which can be detached individually from the embroidery base or can be connected to the embroidery base, so that the segment tension can be removed from the embroidery base segment by segment, so that the side tension bar does not come into conflict with the rolling up shaft. In order to be detached from the embroidery base, the segments of the side tensioning strip are expediently fastened to a chain. As a result, the segments can be moved with one another in a non-linear movement, so that the segments detached from the embroidery base can be removed from the embroidery base. The chain forms a closed loop around two deflection wheels so that the segments are guided in a circular path away from the edge of the embroidery base. The embroidery machine creel has release devices in order to release the embroidery base from the side tension bars. As a result, loosening by hand can be avoided and at the same time only the area of the embroidery base is loosened from the side tension bars, which must necessarily be loosened before winding up.
    As a result, part of the embroidery base can be left under tension. The release devices are arranged stationary on the gate and the side clamping bars are movable relative to the release devices, so that when the embroidery base is moved in the gate, the embroidery base and the side clamping bars are released from one another. The side tension bars have a variety of spikes for hanging the embroidery base. With these spikes, the stick base is held reliably in the tried and tested manner. The segment-like side tension bars are connected to the chain and are guided straight through the rollers of the chain in a guide rail on the embroidery bottom side. The guide ensures constant tension even when the side tensioning bar is moved.In this method known from EP 0 919 657, the chain, with its segments which are suspended in the embroidery base, is pulled along by the embroidery base during the waves. When embroidering very fine fabrics, for example tulle, there is an acute risk that the fine fabric of the tulle will be damaged by the pins of the pin cushions because the chain with the pin cushions must be dragged through the embroidery floor in the vertical direction.In order to prevent the speed of the pulled chains from being lower than the speed of the embroidery base due to friction of the chain links in the guides when moving the gate in the vertical direction, EP 0 690 164 B1 proposes the material transport of the embroidery field on the winding shafts to control precisely that the fabric can be wound onto the winding shafts under controlled tensile force, while at the same time a controlled vertical movement of the embroidery frame takes place. In order to achieve this, it is proposed that the embroidery base on the embroidery needles be touched or touched with the aid of an encoder which detects a displacement of the embroidery base in the vertical direction and feeds this signal as a correction signal to a control unit which controls the material drive of the winding shafts in such a way that compared to the embroidery needles, the embroidery base relatively no longer moves during vertical movement of the embroidery frame.Theoretically, such a device can be used to regulate the synchronization of the gate movement with the displacement of the side tie rod segments. In practice, such a project is very complex, since an encoder and an expensive and heavy servo axis would also have to be installed. The material position is precisely monitored via the encoder and the motors are regulated.
    The object of the invention is therefore to provide a method for undulating an embroidery floor and an embroidery machine creel with which the lateral tension of the embroidery floor can be kept constant on the one hand and the transition region of an embroidery stage on the other hand, during which the embroidery floor is moved within the embroidery machine gate remains invisible to the next.Another object of the invention is to provide a system for clamping the fabric for the embroidery floor on an embroidery machine gate.Another object of the invention is to provide an embroidery machine creel in which the fabric can be continuously stretched onto the embroidery machine creel during undulation.
    This object is achieved by a method for corrugating an embroidery floor according to the features of claim 1.The object is further achieved by a system for clamping the material in accordance with the features of patent claim 11 and by an embroidery machine gate in accordance with the features of patent claim 16.Advantageous embodiments of the method, the system and the embroidery machine gate are described in the claims dependent on claims 1, 11 and 16.
    According to the method, the area adjacent to the transition between the embroidery stages is always kept taut and, in addition, a displacement of the embroidery base in the vertical direction, i.e. achieved in the transport direction of the embroidery base on the upper winding shaft without the use of feelers and one without complex control for driving the pincushion of the side tension rod and the winding shaft. Expediently, during the corrugation of the embroidery base from the lower winding shaft to the upper winding shaft and the displacement of the gate, at least the two opposing pin cushions located at the level of the needles of the embroidery machine are held clamped with respect to the frame of the embroidery machine. As a result, there is no shifting of the embroidery pattern between the first embroidery stage and the second embroidery stage that follows the waves during the wave. By engaging several pincushions on each side of the embroidery base during the corrugation, the embroidery base can be held taut over a greater length in the vertical direction, so that no inclination to the weft and warp threads, that is to say an oblique distortion, can occur. Clamping at least one of the pincushions on each side of the embroidery area by means of clamping means which are attached to the embroidery machine frame ensures that the clamped embroidery base area cannot move in the vertical direction. Embroidery needles inserted during the corrugation are not bent as a result and therefore cannot break. The continuation of the embroidery pattern thus takes place exactly in the tenths of a millimeter range at the point where the previous embroidery pattern has ended. Due to the sticking embroidery needles and especially the pressed fabric paws, even very sensitive materials for the embroidery floor such as tulle are not so burdened that damage can occur in the area of the pincushions.It has proven to be advantageous to detach the embroidery base above the area of the needles from the pin cushions which form the tensioning strip and are not held in place, and thus to wind the embroidery base onto the upper winding shaft without creases.
    By means of holding the pincushion, which are attached to the embroidery machine frame, the moving mass of the gate is increased slightly. It also ensures that the tension on the embroidery base is not changed in the horizontal direction and in particular that the clamped embroidery area cannot be moved in the vertical direction.
    A particularly advantageous embodiment of the invention enables the needling of the fabric onto the pincushions to be carried out without manual intervention, i.e. completely automatically, i.e. without manual intervention as soon as the edge of the fabric approaches the embroidery area from the lower fabric shaft. The needling is carried out very precisely and extremely evenly.
    The synchronous outward pushing of the edge areas of the supplied fabric or embroidery base ensures that the warp threads of the supplied fabric are inserted into the new embroidery area without lateral displacements.
    The structure of the embroidery machine gate and the holding and clamping elements is simple and no drive is required to hold the taut area of the embroidery base with the last stitches before the start of the corrugation precisely during the waves to embroider the stitch pattern after the waves to be able to resume. In addition, extremely low forces act on the held area of the embroidery base during the corrugation.The mass of the gate is not increased by the arrangement of the holding and clamping elements and their drives on the machine frame, for the pincushions on the stenter.The means for lateral tensioning or pushing the incoming fabric outwards are fastened to the struts of the gate and are therefore always exactly in line with the tensioning frame when the fabric is needled.
    Using an exemplary embodiment, the invention is described with reference to the figures. It shows:<tb> Fig. 1 <SEP> is a perspective, needle-side representation of a gate of a large embroidery machine and its drive elements in the X and Y directions,<tb> Fig. 2 <SEP> a view of the gate according to FIG. 1 with the embroidery base completely embroidered before the waves from the front,<tb> Fig. 3 <SEP> a side view of the gate and its drive elements,<tb> Fig. 4 <SEP> a schematic top view of the gate and its drive elements as well as the embroidery needles and fabric presser arranged in between,<tb> Fig. 5 <SEP> an enlarged perspective section A of a holding device for the pincushion on the tensioning strip in FIG. 1,<tb> Fig. 6 <SEP> an enlarged perspective section B of the pin cushions placed on chain links,<tb> Fig. 7 <SEP> is a perspective view of the gate of a large embroidery machine and its drive elements for the gate movement in the X and Y directions at the end of the swelling process,<tb> Fig. 8 <SEP> is a view of the gate according to FIG. 1 with the embroidery base completely embroidered after the waves at the end of the swelling process,<tb> Fig. 9 <SEP> a side view of the gate and its drive elements at the end of the swelling process,<tb> Fig. 10 <SEP> a top view of the creel and its drive element at the end of the swelling process,<tb> Fig. 11 <SEP> an enlarged perspective view of the clamping area on the clamping bar with the clamping element closed,<tb> Fig. 12 <SEP> a perspective view of the embroidery machine and its frame,<tb> Fig. 13 <SEP> a perspective section of the tensioning strip with the edge of the clamped embroidery base,<tb> Fig. 14 <SEP> is a front view of the detail in FIG. 13,<tb> Fig. 15 <SEP> a cross section along line XV-XV in FIG. 14,<tb> Fig. 16 <SEP> a perspective section of a needle station in the needle position,<tb> Fig. 17 <SEP> the needle station swung away from the pincushion,<tb> Fig. 18 <SEP> a side view of the needle station and the lower winding shaft underneath,<tb> Fig. 19 <SEP> a view of the needle station and the deflection of the needle cushion underneath in the working position,<tb> Fig. 20 <SEP> the arrangement according to FIG. 17 in plan view,<tb> Fig. 21 <SEP> a view of the needle station and the deflection of the pin cushion underneath in the open position when a new embroidery base is clamped onto the winding shafts and<tb> Fig. 22 <SEP> a section along line V-V in FIG. 21.
    The stenter of a large embroidery machine, called gate 1 for short, comprises two spaced vertically extending frame parts 3 and 5, between which an upper winding shaft 7 and a lower winding shaft 9 are rotatably and driven. The drives of the two winding shafts 7 and 9 are not shown. The two winding shafts 7 and 9 carry an embroidery base 11, which is held flat tensioned between the two winding shafts 7, 9. The connection between the upper edge of the embroidery base 11, whose warp threads run horizontally and whose weft threads run vertically, with the winding shaft 7 and its lower edge with the winding shaft 9 takes place in a manner known from the prior art. This is not described in more detail here.The two frame parts 3 and 5 are guided in the vertical direction (Y direction) on vertically lying guide rails 13. The guide rails 13 and the gate 1 attached to them can in turn be moved in the horizontal direction with racks 15. The displacement in the horizontal direction takes place via pinions 17, which are driven by a servo motor 19.The frame parts 3, 5 are displaceably mounted in the vertical direction with a toothed rack 21, which is displaceable by a second toothed pinion 23, driven by a second servo motor 25. With the two servomotors 19 and 25, consequently, the two frame parts 3, 5 and the two winding shafts 7 and 9 with the embroidery base 11 stretched thereon can be moved in the vertical and / or horizontal direction and thus the embroidery needles 26 arranged in a horizontal plane allow the Embroidery base 11 can be embroidered. The fabric presser 28 between the needles 26 and also the embroidery base 11 are also shown schematically in FIG. 4.
    Furthermore, two sprockets 27 are fastened to the two frame parts 3 and 5 of the gate 1 on supports that are not visible in the figures, via which endless chains 29 are arranged circumferentially. Pin cushions 33 are placed on the chain links 31 of the chains 29. Thorns 63 on the pin cushion 33 are directed in the direction of the embroidery base 11 and are consequently only visible in FIGS. 13 to 15. The spikes 63 are preferably not perpendicular to the plane of the embroidery base 11, but inclined to it. The inclined arrangement of the thorns 63 on the pin cushion 33 enables the stick base 11 to be held securely when the pin cushion 33 is moved to undulate or tension the stick base 11. The higher the tension, the deeper the spikes 63 engage the embroidery base (FIG. 15).Flag-shaped guide plates 35 are formed on the back of the pin cushions 33.
    Needle side, i.e. 1, 2, 5, 6, 7, 8, 11, a holding device 37 is arranged, which is attached directly to the machine frame 41 of the embroidery machine independently of the gate 1 and is guided horizontally displaceably on a rail 39 ( 5 and 11). The holding device 37 in FIG. 11 comprises a boom 43 which is arranged on the rail 39 so as to be horizontally displaceable. The boom 43 carries a holding plate 45, on which a pair of rollers 47 is fastened on eccentric bolts 49, the eccentric bolts 49 of the two rollers of the pair of rollers 47 being arranged at a distance from one another. The pair of rollers 47 is rotatably mounted on the horizontally arranged eccentric bolt 49 which is perpendicular to the plate 45. The two rollers of the pair of rollers 47 engage on both sides without play on a vertically arranged guide rail 51 or roll on their surfaces without play. The guide rail 51 is arranged on a chain guide 75 for the chain 29.Furthermore, a clamping and holding element 53 is fastened to the holding plate 45. The clamping and holding element 53 comprises two clamping jaws 55, which are pivotally mounted on a vertically lying shaft 57 fastened to the holding plate 45. The clamping jaws 55 are carried by lever arms 59, the ends of which are connected to a pneumatic drive 61.Between the two jaws 55, i.e. between their two opposing surfaces, the jaw plates 33 of the pincushion 33 can be moved without contact when the jaws 55 are open (see FIGS. 5 and 11). 11, the clamping jaws 55 press against the guide plates 35 and hold them in place. Preferably, two or more chain links 31 are clamped simultaneously by the clamping jaws 55 with their guide plates 35 and held stationary with respect to the machine frame 41.The common pivot shaft 57 for the clamping jaws 55 allows them to align themselves automatically on the plates 35 during clamping and consequently press against the guide plates 35 with uniform forces.
    14, 15 that the chains 29 are exactly guided in the chain guides 75 between the two sprockets 27 (not shown in FIGS. 13 to 15). The chain guides 75 are fastened to the creel 1, so that when embroidering, the chain 29 with the pincushion 33 carry the embroidery base 11, which is held tightly to the latter.
    In the enlarged representation of three pincushion 33 in FIG. 13, a possible structure of the pincushion 33 is visible. Each pin cushion 33 is fastened to a chain link 31 or to bolts connecting the chain links 31 by suitable means, for example screws or rivets 65. The pin cushion 33 consists of a multi-bent sheet metal part, an injection molded part or a suitable other material. A first section 67 of the pin cushion 33 lies parallel to the chain link 31. A second section 69 adjoins this, for example, at an angle of 45 °. This is followed by a third section 71 lying parallel to the first section 67. In a preferred embodiment of the pin cushion 33, the spikes 63 are fastened to a fourth section 73 which is inclined to the third section 71. This carries a plurality of needles or spikes 63 at the free end. The spikes 63 can be arranged in a row or more than one row. Instead of thorns 36, triangular prongs can be formed on the edge of the fourth section 73 (FIGS. 16-18). The flag-shaped plate 35 is further molded or attached to the third section 71. In the exemplary embodiment shown, the plate 35 is formed from the third section 71 by a stamping / bending process. The plate 35 can also be welded to the third section 71, for example, or fastened in some other way. In the preferred embodiment according to FIGS. 13 to 15, the pincushion 33 can be manufactured very inexpensively on the one hand by the punching / bending process, and in addition weight can be saved by using an area of the section 71 as a flag 35, which has a positive effect on the overall mass the chain 29, which must be moved with the gate 1 when embroidering.13 and 15 that the mandrels 63, which are inclined at an acute angle to the third section 71, hold the embroidery base 11 securely after the tensioning, since during the tensioning, i.e. when moving the pincushion 33 with the chain 29, the spikes 63 are pushed further into the embroidery base 11 and are pushed through it.
    When moving the pincushion 33 in the horizontal direction «X» together with the chain guide 75, the jaws 55 remain stationary on the holding device 37. Due to the engagement of the pair of rollers 47 on the vertically arranged guide rail 51, which guide rail 51 is connected to the chain guide 75, the holding device 37 is always adapted or carried to the position of the pincushion 33. The clamping or holding element 53 must always be carried along exactly, otherwise the pin cushions 33 would be partially braked and thereby distort the embroidery base 11.
    In the following the method for waves and the mode of operation with the new clamping device is explained in more detail. Based on the situation as shown in FIGS. 1 and 2, the waves occur after the end of embroidery patterns if they cover the area between the two winding shafts 7, 9 as follows: The lower end of the first embroidery area or the connection for the next stage is determined by the needles 27, which are either inserted into the embroidery base 11 or retracted in front of the embroidery base 11. The machine movements have stopped. By actuating the pneumatic drive 61, the clamping jaws 55 are closed, between which those guide plates 35 of the pin cushions 33 are located which hold the embroidery base 11 tensioned on both sides outside the last stitches of the embroidery patterns and fix the guide plates 35 lying between the clamping jaws 55 on the chain links 31 with respect to the Frame 41 of the embroidery machine. By clamping the needle cushions 33 to the side of the needles 27, the area of the embroidery base 11 that is held taut by the connected needle cushions 33 can no longer move in the vertical direction.
    Now the gate 1 with the attached winding shafts 7 and 9 is guided downwards by the servo motor 25. The sprockets 27 with the chain 29 and the chain guide 75, which are attached to the gate 1, also go down. At the same time, the two winding shafts 7 and 9 are driven in such a way that the embroidered embroidery base 11 is wound on the upper winding shaft 7 and the not yet embroidered embroidery base area is unwound from the lower winding shaft 9. The chain wheels 27 are set in rotation by the guide plates 35, pin cushions 33, chain links 29, which are kept clamped, and, on the other hand, by the downward movement of the chain wheels 27. During this process, the sprockets 27 on the left side of the embroidery base 11 rotate counterclockwise, those on the right side clockwise. The chain links 31 with the pin cushions 33 between the chain wheels 27, on which the embroidery base 11 is held taut, do not move analogously to the plates of a caterpillar that has been hit and which lie on the floor. The chain links 31 located at the top are individually led away from the edge of the embroidery base 11 around the chain wheels 27 located at the top. In good time before the pin cushions 33 move away from the edge of the embroidery base 11, the embroidery base 11 is released from the spikes 63 on the pin cushion 33. The embroidery base 11 is detached from the thorns 63 of the pincushion 33 by means of suitably arranged detachment means, which are not described in more detail here. These can have a structure like those in EP 919 657 B1.
    This process continues until the gate 1 is in the position shown in Figs. 7 and 8, i.e. the gate 1 with the winding shafts 7, 9 is at the bottom and the upper winding shaft 7 is directly above the embroidery needles 26. At that point in time, the embroidered base section is almost completely wound on the upper winding shaft 7 and below the needles 27 there is a new, yet unembroidered embroidery base area for the start of the following embroidery process, before it can begin, however, the two lateral edges of the embroidery base 11 are fastened below the needles 27 to the pincushion 33, which lie below the clamping and holding element 53. It must be ensured that the weft threads of the embroidery base 11 run parallel to the pincushion 33 lying in a row. As soon as this is the case, the clamping and holding elements 53 or their clamping jaws 55 can be opened. The embroidery designs that were no longer continued at the end of the previous first embroidery process can now be embroidered exactly and without deviation or offset. During the embroidery process of the second embroidery area, the clamping jaws 55 remain open and the guide plates 35 on the chain links 31 can slide through contactlessly between the clamping jaws 55 and do not hinder them from passing when the embroidery base 11 with the gate 1 moves upward relative to the clamping jaws 55 emotional. This is ensured by the pair of rollers 47. After completion of the following second embroidery stage, the clamping jaws 55 can be closed again because the situation has arisen again, as has been shown and described in FIGS. 1 and 2.
    During the corrugation of the embroidery base 11 from the lower winding shaft 9 to the upper winding shaft 7, no disruptive forces act on the embroidery base 11 because, by moving the gate 1 downward, no chain movement of the strand of the chain 29 resting on the embroidery base 11 is triggered in the clamping area and the needle cushions 33 moving away from the embroidery base 11 via the upper chain wheel 27 no longer have a connection to the embroidery base 11.The lateral, that is, horizontal movements of the gate 1 during embroidery are not impeded by the clamping and holding element 53, since the latter of the pair of rollers 47, which is guided on the guide rail 51, follow the horizontal movements of the gate 1.
    16 to 21 a needle device 77 is described with which the unwound from the lower winding shaft 9 and entering the embroidery area material or embroidery base 11 is grasped at the edges thereof, pulled outwards and needled onto the pincushion 33 . For this purpose, needle devices 77 are arranged on the two vertically running frame parts of the gate 1. These each include a support plate 79 on which a drive motor 81 is pivotally mounted about a vertical axis A. The drive motor 81 carries on its output shaft a cylindrical roller 83 with an elastic jacket surface. The roller 83 has an abrasion-resistant surface made of natural rubber, e.g. Para rubber or a similar, optimal friction properties for pushing the other material having the embroidery base. Alternatively, the roller 83 can also be designed as a brush roller with radially arranged bristles. The bristle ends arranged in a cylindrical surface form a rough surface. The drive motor 81 and the roller 83 are preferably fastened on two spaced-apart upper and lower swivel plates 85. The roller 83 is supported at both ends on the swivel plates 85. Furthermore, a pressure wheel 89 with an essentially horizontal axis of rotation is freely rotatably mounted on the swivel plates 85 on a cantilever 87. The pressure wheel 89 is mounted on an axle stub 91, which is fastened perpendicularly to the boom 87. At the upper end of the boom 87, a guide plate 93 is configured with a partially curved edge. Its vertically aligned edge region 95 lies parallel to the needles 33 'of the needle cushions 33.A swivel lever 97 is also attached to the upper or lower swivel plate 85, with which the two swivel plates 85 together with drive motor 81 and roller 83 as well as the pressure wheel 89 and guide plate 93 move from a working position (FIG. 16) to a rest position (FIG. 17} In order to maintain the working position, a spring assembly 99 is clamped between the support plate 79 and the swivel plates 85. The spring assembly 99 can comprise, for example, one or two coil springs. On the one hand, the spring assembly 99 enables the needle device 16 and, on the other hand, the working position is not rigid, but the pressure of the pressure wheel 89 on the pincushion 33 is resilient, in order to prevent problems with needling of the edge area of the embroidery base 11 and when using Fabrics of different thickness, the pressure wheel 89 from the needles can take off 33 '.
    In Fig. 18 it can be seen that the embroidery base 11 extends tangentially away from the lower winding shaft 9 and directly upwards to the pincushion 33 and lies in the plane in which the base of the needles 33 'protrude from the pincushion 33.
    19, the pressure wheel 89 is in the working position and its teeth engage between the needles on the pincushion 33. The pressure wheel 89 engages in the needles 33 'of the pincushion 33 after this on a chain guide 75, not shown or not visible be guided in line upwards (arrow p). The embroidery base 11 is unwound from the lower winding shaft 9 and wound onto the upper winding shaft (not shown in FIG. 19). With the roller 83, which is driven by the drive motor 81, the edge region 11 'of the embroidery base 11 is pulled to the right in the direction of the arrow S, i.e. the embroidery base is stretched over the tips of the needles of the needle cushions 33 and immediately afterwards pressed into the needles by the pressure wheel 89. Before the embroidery base 11 or its edge region 11 ́ reaches the pressure wheel 89, the edge region 11 ́ is guided by the guide plate 93 (clearly visible in FIG. 21), which guides the edge region 11 ́ after crossing the needles of the needle cushions 33 on the needleless ones Presses the area of the pin cushion 33 or a frame area and holds down the edge area.
    In summary, the needling of the embroidery base 11 takes place in that the edge regions 11 'of the embroidery base 11 are pulled outwards from the centrally located embroidery region with the rollers 83. The edge regions 11 'cross over the needle cushions 33 or their needles and are guided by the guide plates 93 behind the needles onto the needle-free areas of the needle cushions 33 and are pressed securely into the needles of the needle cushions 33 by the pressure wheels 89.After the new embroidery area has been corrugated in the frame, the tension rods, i.e. the pin cushions 33 are guided outwards and the clamped embroidery base 11 is thereby tensioned to the necessary tension in the horizontal direction and by the winding shafts in the vertical direction.
    Legend of the reference symbols
    [0028]<tb> 1 <SEP> gate<tb> 3 <SEP> frame part<tb> 5 <SEP> frame part<tb> 7 <SEP> winding shaft above<tb> 9 <SEP> winding shaft below<tb> 10 <SEP> side tension bars<tb> 11 <SEP> embroidery base<tb> 11 ́ <SEP> edge area<tb> 13 <SEP> guide rail<tb> 15 <SEP> racks {transverse}<tb> 17 <SEP> pinion<tb> 19 <SEP> servo motor<tb> 21 <SEP> racks (high)<tb> 23 <SEP> pinion<tb> 25 <SEP> second servo motor<tb> 26 <SEP> embroidery needles<tb> 27 <SEP> sprockets<tb> 28 <SEP> presser<tb> 29 <SEP> chain<tb> 29 ́ <SEP> run<tb> 31 <SEP> chain link<tb> 33 <SEP> pincushions<tb> 33 ́ <SEP> needles<tb> 35 <SEP> guide plate<tb> 37 <SEP> holding device<tb> 39 <SEP> rail<tb> 41 <SEP> machine frame<tb> 42 <SEP> needle plate<tb> 43 <SEP> boom<tb> 45 <SEP> holding plate<tb> 47 <SEP> pair of roles<tb> 49 <SEP> eccentric bolts<tb> 51 <SEP> guide rail<tb> 53 <SEP> clamping and holding element<tb> 55 <SEP> jaws<tb> 57 <SEP> wave<tb> 59 <SEP> lever arm<tb> 61 <SEP> pneumatic drive<tb> 63 <SEP> mandrel<tb> 65 <SEP> rivets or screws<tb> 67 <SEP> first section of 33<tb> 69 <SEP> second section v. 33<tb> 71 <SEP> third section v. 33<tb> 73 <SEP> fourth section v. 33<tb> 75 <SEP> chain guide<tb> 77 <SEP> needle device<tb> 79 <SEP> support plate<tb> 81 <SEP> drive motor<tb> 83 <SEP> roller<tb> 85 <SEP> swivel plate<tb> 87 <SEP> boom<tb> 89 <SEP> pressure wheel<tb> 91 <SEP> stub axle<tb> 93 <SEP> guide plate<tb> 95 <SEP> vertical edge area<tb> 97 <SEP> swivel lever<tb> 99 <SEP> spring pack
    权利要求:
    Claims (20)
    [1]
    1. Method for corrugating an embroidery base (11) in a gate (1) of an embroidery machine between an upper winding shaft (7) and a lower winding shaft (6) and for laterally tensioning the embroidery base (11) along the between the winding shafts (7,9 ) lying side edges of the embroidery base (11) with side tensioning strips (10), each of which comprises an encircling chain (29) with pin cushions (33) arranged on its chain links (31), characterized in that the 'before the start of the corrugation is laterally from the area of the embroidery base (11) with the last stitches of the embroidery pattern in engagement with the embroidery base (11) and the pin cushion (33) in relation to the frame of the embroidery machine are clamped and the pin cushion (33) and thus the clamped embroidery base (11) clamped and held tight during the corrugation.
    [2]
    2. The method according to claim 1,characterized by the following process steps:- stopping the machine movements,- Clamping at least one chain link (31) with the attached pin cushions (33) in the area to the side of the embroidery needles (26),- Raising the embroidery base (11) on the upper winding shaft (7) and pulling off the unembroidered embroidery base (11) from the lower winding shaft (9) and- Simultaneously moving the gate (1) down with the winding shafts (7,9) relative to the frame of the embroidery machine.
    [3]
    3. The method according to any one of claims 1 or 2, characterized in that at least some of the embroidery needles (26) are inserted into the embroidery base (11) or remain inserted before the corrugation begins.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that before the waves, the presser (28) of the embroidery machine moves up to the embroidery base (11) and the embroidery base (11) against a needle plate (42) attached to the machine frame (41). is pressed.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that when moving the gate (1) with the winding shafts (7,9) attached to it before transferring the embroidered embroidery base (11) to the upper winding shaft ( 7) the needle cushions (33) are released one after the other from the embroidery base (11) or the embroidery base (11) is removed from the needle cushions (33).
    [6]
    6.Procedure for needling when corrugating a textile band-shaped embroidery floor along its opposite edges on pin cushions 33, which are arranged on transport means that run endlessly around two sprockets 27 and whose opposite dreams 29 'are each guided in parallel in a guide rail 75, the Sprockets 27 are attached to the frame 1 3,5 forming a gate 1 of an embroidery machine, according to one of claims 1 to 5,characterized by the following measures:- Pushing the two edge areas of the band-shaped embroidery base (11) outwards beyond the tips of the needles on the needle cushions (33),Pressing the edge areas onto the needleless sections of the pin cushions 33,- Insert the needles into the embroidery base (11) by pressing the embroidery base onto the tips of the needles in the area between the needles.
    [7]
    7. The method according to claim 6, characterized in that each edge region with the periphery of a roller made of rubber 83 or brushes on the guide plates are pushed outwards.
    [8]
    8. The method according to any one of claims 6 or 7, characterized in that the edge regions 11 'with a guide plate (93) over the pincushion {33) are kept stretched.
    [9]
    9. The method according to any one of claims 6 to 8, characterized in that the edge regions are pressed into the needles with a toothed pressure wheel (89).
    [10]
    10. The method according to claim 9, characterized in that the teeth of the pressure wheel (89) engage between the needles of the pincushion (33).
    [11]
    11. System for corrugating the embroidery base on the gate (1) on a large embroidery machine, comprising an upper (7) and a lower winding shaft (9) for corrugating an embroidery base (11) from the lower winding shaft (9) to the upper winding shaft (9 ), the winding shafts (7, 9) being fastened rotatably and drivably between two spaced frame parts (3, 5), further comprising two side tensioning strips (10) arranged on the frame parts (3, 5) of the gate (1) for lateral Tensioning the embroidery base (11), which side tension bars (10) each comprise a chain (29) rotating around two sprockets (27), which chains (29) are each guided in a chain guide (75) and pin cushions attached to the chain links (31) (33), characterized in that holding and clamping elements (53) are arranged on the machine frame (41) of the embroidery machine, with which at least one chain link (31) can be clamped with a pin cushion (33) on both side edges of the embroidery base (11) is.
    [12]
    12. System according to claim 11, characterized in that the holding and clamping element (53) comprises two mutually guided clamping jaws (55) which can be actuated by a drive (61) and that on the chain links (31) or the pin cushion (33 ) Guide plates (35) are arranged, which can be passed between the clamping jaws (55) when embroidering and can be clamped when the shafts are embroidered.
    [13]
    13. System according to one of claims 11 or 12, characterized in that the holding and clamping elements (53) on the frame (41) of the embroidery machine are guided horizontally displaceably along a rail (39).
    [14]
    14. System according to one of claims 11 to 13, characterized in that the holding and clamping elements (53) in the vertical direction on a guide rail (51) on the chain guide (75) are slidably guided.
    [15]
    15. System according to claim 14, characterized in that the vertical guidance of the holding and clamping elements (53) on the guide rail (51) with a pair of rollers (47), which pair of rollers (47) engages around the guide rail (51) laterally without play.
    [16]
    16. embroidery machine creel with a device for needling a ribbon-shaped embroidery base (11) along its mutually opposite edges on pin cushions (33), which are arranged on transport means (29) continuously rotating around two chain wheels (27) and their opposing dreams (29 ') are each guided parallel to one another in a guide rail, the chain wheels (27) being fastened to the frame parts (3, 5) forming the frame (1) of the embroidery machine, characterized in that a sliding element is attached to each of two opposite frame parts (3, 5) and in each case a presser is arranged on a support which can be pivoted substantially parallel to the frame elements (3, 5) axis (A).
    [17]
    17. The apparatus according to claim 16, characterized in that the sliding element comprises a substantially cylindrical roller (83) which is mounted on a drivable shaft of a drive motor (81).
    [18]
    18. The apparatus according to claim 17, characterized in that the roller (83) has a radially elastic surface made of rubber or that the surface of the roller (83) is formed by radially arranged bristles.
    [19]
    19. Device according to one of claims 17 or 18, characterized in that a guide edge on the guide plate (93) spaced from the axis of the roller (83).
    [20]
    20. Device according to one of claims 16 to 19, characterized in that on the carrier a rotatably mounted pressure wheel (89) for pressing the edge region (11 ́) of the embroidery base on and into the needles of the pincushion (33) substantially parallel to the guide plate ( 93) is arranged.
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    同族专利:
    公开号 | 公开日
    CH715433A1|2020-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1195809A|1916-08-22|groebli |
    US4233916A|1978-01-10|1980-11-18|Emb-Tex Corporation|Process and apparatus for producing continuous embroidered fabrics|
    US5022336A|1989-04-26|1991-06-11|Prince Sewing Machine Co., Ltd.|Pin type conveyor fabric feeding apparatus for a sewing machine|
    CN204080393U|2014-07-18|2015-01-07|天津宝盈电脑机械有限公司|Novel clamp cloth apparatus|
    法律状态:
    2021-12-15| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    CH01216/18A|CH715433A1|2018-10-04|2018-10-04|Method of corrugating an embroidery base and an embroidery machine creel.|EP19197830.3A| EP3643828B1|2018-10-04|2019-09-17|Embroidery machine and method for transferring the embroidery ground onto the needles holding the ground during rolling|
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