Perforating device and embroidery sewing machine with the perforating device

Abstract

Perforating device, comprising: a perforation head (4) with a vertically reciprocating rod (15) and a perforation tool (17) provided at a front end of the rod (15); a receiving base (6) arranged below the perforation head (4), wherein the receiving base (6) includes a receiving element (30b) configured to receive the perforation tool (17) which is lowered according to the lowering movement of the rod (15); a holding frame (14) configured to support a workpiece in an expanded state between the perforation tool (17) and the receiving base (6) in a planar direction orthogonal to the vertical direction of the rod (15), wherein the holding frame (14) is configured to be controlled to move in a two-dimensional direction, such as in a forward / backward direction of the plane and a right / left direction orthogonal to the forward / backward direction; and a damping material feeding mechanism (8) configured to feed a ribbon-like damping material (H) with a greater width than at least one working area of ​​the perforation tool (17), wherein the mechanism (8) feeds the material from the forward / reverse direction between the workpiece held in the holding frame (14) and a top surface of the receiving element (30b), wherein the mechanism (8) displaces damping material (H) at a speed corresponding to the vertical reciprocal movement of the perforation tool (17).

Description

Technical field

[0001] The present disclosure relates to a perforating device and an embroidery sewing machine with the perforating device. Technical background

[0002] Conventional perforating devices, as disclosed in WO2015 / 076389 A1, are known, wherein the devices have a perforation head for forming perforations in a workpiece, such as a sheet of leather. This publication discloses a technology relating to a sewing machine that has a perforation head for carrying out perforation processes and an embroidery head for carrying out embroidery around the perforations formed in the perforation processes. When carrying out the perforation processes by applying the perforation head to a workpiece, such as a sheet of leather, this technology requires the following processes. The methods include a method for placing a resin film with a thickness of approximately...The system comprises a 0.5 mm thick damping material on a mounting base that accommodates the front end of a perforating tool's cutting blade, a method for placing a leather sheet onto the resin film and positioning it in a holding frame, and a method for performing the perforation process itself using the cutting blades in the leather sheet together with the resin film. These processes serve to prevent damage to the cutting tool, ensure a reliable perforation process, and reduce the noise level during the perforation process.

[0003] A stamped mark can remain on a portion of the resin foil that has undergone a perforation process. This can lead to a decrease in reliability, as a depression caused by the stamped mark may deepen, and the foil may then shrink and become wavy due to irregularities caused by the stamped mark. Therefore, it is generally desirable to replace the resin foil with a new one each time the leather sheet is replaced. However, given the cost of the resin foil, it is often reused several times to the extent that the stamping quality is not affected, and then finally disposed of. Further perforating devices are known from documents WO 2004 / 099 448 A2, CN 2 09 065 930 U, CN 2 09 522 862 U, US 2 275 612 A, US 8 733 263 B2 and US 2008 / 0 178 785 A1. Summary of the invention: The problem to be solved by the invention

[0004] The resin film disclosed in WO2015 / 076389 A1 must, however, be the same size as the leather sheet, as it is overlaid with the leather sheet and held integrally within the holding frame. Because of this configuration, the resin film must be disposed of with parts that do not undergo a perforation process, even if the resin film is reused multiple times without affecting the perforation quality. Therefore, further improvements in cost efficiency are required. Furthermore, according to the technology described above, when the process is moved to subsequent processes such as embroidery after the perforation process, the leather sheet and the resin film must be temporarily removed from the holding frame, and the leather sheet must be replaced in the holding frame while the resin film is removed, and then moved accordingly to the subsequent process.Furthermore, it is also possible that the process is shifted to the subsequent process, whereby the removal of the resin layer is forgotten.

[0005] A perforating device was desired that would allow the process to be smoothly switched to the subsequent process, while simultaneously reducing the waste of damping material and maintaining a constant perforation quality. Means to solve the problem

[0006] According to one aspect of the present disclosure, a perforating device comprises: a perforating head with a vertically reciprocating rod and a perforating tool provided at a front end of the rod; a receiving base arranged below the perforating head and including a receiving element configured to receive the perforating tool, which is lowered in accordance with the lowering movement of the rod; a holding frame configured to support a workpiece in an expanded state between the perforating tool and the receiving base in a plane direction intersecting the vertical direction of the rod, the holding frame being configured to be controlled to move in a two-dimensional direction, such as a forward / reverse direction of the plane direction and a right / left direction orthogonal to the forward / reverse direction;and a damping material feeding mechanism for feeding a band-shaped damping material with a greater width than at least one working area of ​​the perforation tool, wherein the working area is located in the forward / reverse direction and between the workpiece held in the support frame and a top of the receiving element, while a position of the cushioning element is shifted according to the vertical reciprocal movement of the perforation tool.

[0007] A feature and advantage of the present disclosure is that the waste of the damping material to be supplied can be reduced because the damping material supply mechanism feeds the ribbon-like damping material, wherein the material has a greater width than at least one processing area of ​​the perforation tool, while at the same time the supply mechanism can shift the position of the damping material in response to the vertical reciprocal movement of the perforation tool. Since the damping material is supplied successively with remaining punches, the deterioration of reliability due to irregularities formed by the punches during the perforation process can be prevented. That is, the perforation quality can be kept constant.Furthermore, the workpiece can be easily moved to a subsequent process after perforation because the damping material feed mechanism is configured to supply the damping material independently of the workpiece held in the frame. Additionally, if a damping material change is required during perforation, it can be done without removing the workpiece from the frame, thus improving interchangeability. Since the damping material feed mechanism is configured to feed the material from the front / back, the machine's overall size is minimized. This is particularly noteworthy for perforation equipment that accommodates a variety of perforation heads.This allows the perforating device to be smoothly switched to the subsequent process, while simultaneously reducing the waste of damping material and maintaining a constant perforation quality.

[0008] The damping material feed mechanism of the above perforating device may include a spool of wound damping material, and the spool is preferably supported on a frame designed to support the receiving base under the perforating head in the forward / reverse direction.

[0009] Another feature and advantage of the present disclosure is that it is possible to further prevent the machine from enlarging in the right / left direction.

[0010] The damping material feeding mechanism of the above perforating device preferably includes a feeding section configured to feed the damping material between the workpiece held in the support frame and the top of the receiving element. A detection mechanism is provided within the feeding channel of the damping material from the spool to the feeding section, wherein the detection mechanism is configured to detect the feeding status of the damping material by means of an actuator that can be displaced according to the tension exerted on the damping material.

[0011] Another feature and advantage of the present disclosure is that it is possible to determine whether the damping material is being fed in a stable manner or not, since the detection mechanism is provided within the feed channel between the coil and the feed section, wherein the detection mechanism is configured to detect the feed state of the damping material by the actuator, which is able to move according to the voltage applied to the damping material.

[0012] The feed section of the perforating device can preferably be built within the receiving base.

[0013] Another feature and advantage of the present disclosure is that the feeding mechanism for the damping material can be formed in a compact design, since the feeding section is built into the receiving base.

[0014] The detection mechanism of the above perforating device may preferably include: an inverting element configured to guide the damping material; a movable body configured to support the inverting element axially in a rotatable manner, the movable body being configured to slide along with the inverting element in response to the level of stress exerted on the inverting element by the damping material; a displacement element supported on the movable body; and a sensor configured to detect a sliding movement of the inverting element.

[0015] Another feature and advantage of the present disclosure is that the detection mechanism can include a movable body configured to support the inverting element in an axially rotatable manner, wherein the movable body is configured to slide along with the inverting element in response to the level of stress exerted on the inverting element by the damping material, and a displacement element supported on the movable body. Furthermore, the detection mechanism can include a sensor configured to detect the sliding movement of the displacement element. Therefore, it is possible to determine whether the damping material is being fed stably or not by detecting whether the inverting element is positioned appropriately for guiding the damping material as the damping material is fed from the coil to the feed section.

[0016] The displacement element of the above perforating device can preferably move upwards when the inverting element is raised when tension is applied to the damping material due to an abnormal rotation of the coil, and downwards due to the weight of the moving body when the damping material wound around the coil is fully fed in or released while tension is not applied to the damping material.

[0017] Another feature and advantage of the present disclosure is that the displacement element can detect a delay or a stop in the supply of the damping material due to the abnormal rotation of the coil, or a cessation of the supply of the damping material wound around the coil, or a loosening of the damping material due to upward or downward movement of the moving body that carries the inverting element.

[0018] The receiving base of the above perforating device may preferably include a receiving plate with a window hole into which the perforating tool can be inserted, and a guide on a rear side of the receiving plate, wherein the guide is configured to limit the movement of the cushioning material in relation to the window hole in the lateral direction and to prevent the cushioning material from being removed from the window hole.

[0019] Another feature and advantage of the present disclosure is that the damping material can be fed in a stable manner, since the guide can restrict the movement of the damping material in relation to the window opening in the width direction and the removal of the damping material from the window opening.

[0020] The guide of the above perforating device is preferably configured to guide the damping material to the feed section through a convexly curved surface directed towards the perforating tool.

[0021] Another feature and advantage of the present disclosure is that the guide can gently introduce the damping material into the feed section, since it is configured to guide the damping material to the feed section through the convexly curved surface which is directed towards the perforation tool.

[0022] The damping material feed mechanism of the above perforating device is preferably configured to allow adjustment of the damping material feed.

[0023] Another feature and advantage of the present disclosure is that the waste of the cushioning material to be supplied can be further reduced, since the cushioning material supply mechanism is configured to switch the feed rate of the cushioning material. Furthermore, the work efficiency of the perforation process can be improved, as the feed rate can be switched according to the configuration or area of ​​the perforation tool.

[0024] The perforation head of the perforating device can incorporate a variety of perforation tools with different planar shapes. The damping material feed mechanism is preferably configured to switch the amount of damping material fed in response to the switching of the different perforation tools.

[0025] Another feature and advantage of the present disclosure is that both the flexibility of the perforation forming and the work efficiency of the perforation process can be improved, since the amount of padding material applied can be automatically switched depending on the type of different perforation tools.

[0026] The embroidery sewing machine can have the above perforating device and an embroidery head with a vertically reciprocating needle bar and a sewing needle at a front end of the needle bar.

[0027] Another feature and advantage of the present disclosure is that the perforation process and the embroidery process can be easily carried out by the sewing machine if the sewing machine is an embroidery sewing machine with the perforation device, the embroidery head including the vertically reciprocating needle bar and the sewing needle provided at the front end of the needle bar. Brief description of the drawings Fig. Figure 1 is a front view of a sewing machine according to a first embodiment. Fig. Figure 2 is a front view of a perforation head according to the first embodiment. Fig. Figure 3 is a cross-sectional side view showing a mounted state of a punch (perforating tool) on a needle bar (vertically reciprocating bar) according to the first embodiment. Fig. Figure 4 is a front view of a receiving base and a belt feed mechanism (damping material feed mechanism) according to the first embodiment. Fig. Figure 5 is a side view of the receiving base and the tape feed mechanism (damping material feed mechanism) according to the first embodiment. Fig. Figure 6 is a top view of the receiving base according to the first embodiment. Fig. Figure 7 is a sectional front view of the receiving base according to the first embodiment. Fig. Figure 8 is a cross-sectional side view of the receiving base and a feed section of the belt feed mechanism (damping material feed mechanism) according to the first embodiment. Fig. Figure 9 is a perspective exploded view of a die base according to the first embodiment. Fig. Figure 10 is a perspective view of a receiving plate according to the first embodiment. Fig. Figure 11 is a perspective view of a feed section of the belt feed mechanism (damping material feed mechanism) according to the first embodiment. Fig. Figure 12 is a side view of a receiving base and a tape feed mechanism (damping material feed mechanism) according to a second embodiment. Fig. Figure 13 is a perspective view of a feed section of the belt feed mechanism (damping material feed mechanism) according to the second embodiment. Fig. Figure 14 is a perspective view of a detection device of the belt feed mechanism (damping material feed mechanism) according to the second embodiment. Embodiments for carrying out the invention<ERSTE AUSFÜHRUNGSFORM>

[0028] The first embodiment for carrying out the present disclosure is described below with reference to the Fig. The first embodiment of the present disclosure is described by illustrating an embroidery machine main body 1 which includes a perforation head 4 for perforating and an embroidery head 3 for embroidering. The embroidery machine main body 1 with the perforation head 4 and the embroidery head 3 is described as an example of the first embodiment, but is not limited to the embroidery machine main body 1 and may optionally include a perforation device which includes only the perforation head 4. <Overview of the machine>

[0029] As in Fig. As shown in Figure 1, a known embroidery head 3 and a perforation head 4 are arranged side by side at a distance from each other in front of an upper frame 2 of the embroidery machine main body 1. The embroidery head 3 includes a plurality of needles. Below the embroidery head 3, a hook base 5 is arranged on a base 7, the hook base 5 having a known rotating hook which, in cooperation with the needles, performs a sewing operation. Furthermore, below the perforation head 4, a receiving base 6 is arranged together with a tape feed mechanism 8 (damping material feed mechanism), the receiving base 6 carrying a punching base 30 (see Figure 1). Fig. 9).

[0030] An X-axis drive 10 and a Y-axis drive 11 are arranged on a sewing machine table 9. The X-axis drive 10 is connected to an X-axis section 12, which is attached to the lower frame 7 below the sewing machine table 9. The Y-axis drive 11 is connected to a Y-axis drive section 13, which is also attached to the lower frame 7. The workpiece support frame 14 is detachably connected to the X-axis drive 10 and the Y-axis drive 11, such that the support frame 14 is moved in the X-direction when the X-axis drive 10 and the Y-axis drive 11 are moved in any direction based on pattern data. The Y-direction is referred to as the forward / reverse direction on a flat spreading direction of the sewing machine table 9. The X direction is referred to as the right / left direction orthogonal to the forward / backward direction on the plane of the propagation direction of the sewing machine table 9.In this way, the holding frame 14 carries the workpiece between the punches (perforation tools) 17 of a perforation head 4, which is described below, and the receiving base 6. Additionally, the workpiece is in an expanded state on a plane spreading direction that intersects an up / down direction of the vertically reciprocating needle bars 15. The holding frame 14 is configured to be controlled to move in two directions, including a forward / backward direction (Y-direction) and a right / left direction (X-direction), which intersects the forward / backward direction in the spreading direction of the plane.

[0031] Although not shown, the main body of the embroidery machine 1 according to the first embodiment includes a control unit (control means) with a microprocessor that operates according to a software program or a special circuit, etc. Here, the control unit can include a storage means for storing, for example, perforation pattern data that enables the perforation process to be carried out on a leather sheet (workpiece), or embroidery pattern data that enables embroidery to be carried out around perforation holes formed by the perforation process. Various of these operations described in the first embodiment can be stored as instructions for software programs, and the instructions can be stored on a computer-readable storage medium in a non-temporary or non-volatile manner.Therefore, the main body of the embroidery machine 1 is able to perform various operations such as a perforation process and an embroidery process, which in the first embodiment are described by the control based on the perforation pattern data or the embroidery pattern data according to the control. <Perforationskopf 4>

[0032] As in Fig. As shown in Figure 2, the perforation head 4 is configured to exclude a pickup lever and a thread guide from a needle bar housing of the known embroidery head 3 (see Figure 2). Fig. 1) and is provided with a plurality of vertically reciprocating needle bars 15 similar to the embroidery head 3. Each needle bar 15 is hollow. A tube 16 is attached to the upper end of each needle bar 15 and is connected to a vacuum device (not shown). Furthermore, a punch (perforating tool) 17 is attached to the lower end of each needle bar 15 as an alternative to a needle. Since no needle is attached to the needle bar 15 of the perforating head 4, the needle bar 15 will henceforth be referred to as a vertically reciprocating bar.

[0033] As in Fig. As shown in Figure 3, the punch 17 includes a perforating blade 17b (a flat, circular blade in this example) formed at the lower end of a main body 17a, and a mounting section 17c formed at the upper end of the main body 17a. The mounting section 17c of the punch 17 is inserted into the lower end of the vertically reciprocating rod 15, and a screw 19 of the needle holder 18 is tightened. In this way, the punch 17 can be attached to the vertically reciprocating rod 15. In this example, similar punches 17 are attached. However, different punches 17 with a perforating blade 17b of a different planar shape can be used interchangeably, such as a triangular shape, a square shape, a pentagonal shape, an elliptical shape, a star shape, or the same circular shape with a different diameter. <Aufnahmebasis 6>

[0034] The recording base 6 is, as in the Fig. Figures 4 to 8 show the components configured as a base, comprising a base plate 6a, side plates 6b which are attached upright on both sides of their upper surface, a support plate 6c which is arranged between the front lower section of the side plates 6b and an upper plate 6d. The base plate 6a is attached to a lower frame 7 by screws 20. A cover plate 61a and a cover plate 61b are attached to the upper plate 6d.

[0035] As in Fig. As shown in Figure 8, four sleeves 22, each with a guide rod 21 inserted through the respective sleeve 22, are driven into the support plate 6c at a predetermined distance. Each guide rod 21 is guided vertically displaceably within the sleeve 22, and a retaining element 23 is attached to the upper end of the guide rod 21. A compression coil spring 24 is attached to each guide rod 21 between the support plate 6c and the retaining element 23 to push the retaining element 23 upwards with its preload force. Furthermore, an adjusting rod 25 is inserted at a central position on the support plate 6c, the central position being located in the middle of the support plate 6c with respect to the four guide rods 21. The upper end of the adjusting rod 25 is fastened to the underside of the retaining element 23 by a screw 26, while the lower end projects downwards from the support plate 6c.A stop 27 (split collar) is attached to the preceding section, and a nut 28 is screwed onto the front end section of the adjusting rod 25. The position of the upwardly pre-tensioned retaining element 23 can be adjusted by tightening this nut 28.

[0036] As in Fig. As shown in Figure 9, a circular recessed retaining section 29 is formed on the upper side of the retaining element 23, and a brass die base 30 is inserted into this retaining section 29. A notch forms in the front center of the retaining element 23 as an inlet 31 for the strip-shaped damping material H (see Figure 9). Fig. 8) In the rear center of the retaining element 23, a recess is formed as an outlet 32 ​​for the ribbon-like damping material H, and a coil 33 is rotatably inserted into the recess. The outlet 32 ​​is provided with a guide 34 configured to guide the ribbon-like damping material H to the intake area 37, as described below (see Fig. 11).

[0037] The die base 30 comprises a base element 30a and a receiving material 30b. The base element 30a is a circular plane with an inclined surface 30c, which is aligned with the feed inlet 31 of the holding element 23. The top of the receiving element 30b is designed as a guide surface in a curved arc shape and is screwed onto the base element 30a, such that its thin side is positioned in one side of the inclined surface 30c.

[0038] A cover plate 35 is screwed onto the top of the retaining element 23. A window opening 35a is formed within the cover plate 35 as a feed channel for the strip-shaped damping material H (see Fig. 8) The receiving element 30b is located in the center of the window opening 35a. A round receiving plate 36 is screwed onto the cover plate 35 to cover the window opening 35a. The receiving plate 36 includes a window opening 36a through which the punch 17 is inserted. A guide section 36b is formed on its rear side in a position corresponding to the position of the window opening 35a in the base plate 35. Fig. Figure 1 shows the reverse side of the receiving plate 36. The guide section 36b is notched to form a circular arc in the direction of the inlet and outlet, and its width is greater than the window hole 36a through which the punch 17 is inserted, and slightly greater (11 mm) than the width (10 mm) of the ribbon-like damping material H. Therefore, the ribbon-like damping material H runs between the receiving element 30b of the punch base 30 and the receiving plate 36 and is guided along the guide section 36b without exiting the window hole 36a of the receiving plate 36.

[0039] The aforementioned receiving base 6 includes a belt-like feeding mechanism 8 (damping material feeding mechanism) comprising a feeding section 37 and a spool holder section 50. <Zuführabschnitt 37>

[0040] Fig. Figure 11 shows the feed section 37 in detail. The feed section 37 is integrated into the receiving base 6 (see Fig. 4 and Fig. 5) and is located behind the die base 30 (see Fig. 9) A notch 38 is provided on the right side plate 6b of the mounting base 6. A motor 40 is attached to a bracket 39 that extends from the outside through the notch 38 to the inside. A drive coil 41 is attached to one end of the motor shaft, while a handle 42 for manual operation of the motor shaft is attached to the other end. A driven coil 45 is rotatably resting against the upper part of the drive coil 41. The driven coil 45 is supported by a support pin 44 of a damper 43 such that it can rotate about the support pin 44. The damper 43 includes an elongated hole 43a to the right and left of its support pin 44. The damper 43 is supported vertically and displaceably on the bracket 39 by the pins 43b, which are inserted through the elongated holes 43a, while the damper 43 is biased downwards by a spring plate 46 on the upper part of the bracket 39.The driven coil 45 is always aligned with a roller surface of the drive coil 41, with the strip-shaped damping material H being held between the drive coil 41 and the driven coil 45 and being transported by the rotation of the drive coil 41. The guides 47A and 47B are arranged in front of and behind the position in which the drive coil 41 and the drive coil 45 hold the strip-shaped damping material H. The guides 47A and 47B serve to hold the strip-shaped damping material H and limit its displacement (see Figure 4). Fig. 8) The guides 49A and 49B are arranged behind and below the inlet section 37 and serve to guide the ribbon-shaped damping material H towards the outlet 48 formed in the base plate 6a of the receiving base 6. <Spulenhalterungsabschnitt 50>

[0041] The coil support section 50 is arranged along the forward / reverse direction (Y-direction). In particular, the coil support section 50 comprises a support base 51, a support shaft 52, and a limiting element 53 (split ring), with the coil support section 50 being arranged diagonally below and in front of the receiving base 60. The support base 51 has a substantially L-shaped configuration, and one end of the support base 51 is bolted to a front surface of the lower frame 7, while the other end (leading end) projects forward and downward. The support shaft 52 is provided at the front end of the support base 51. The support shaft 52 is configured to rotatably support the coil 54 around which the ribbon-shaped damping material H is wound. The coil 54 is mounted on the support shaft 52 and is held in a substantially upright position by a limiting element 53 arranged on the outer sides of the coil 54.The limiting element 53 can be moved in the axial direction to adjust for different widths of the coil 54 due to the different size of the ribbon-shaped damping material H.

[0042] A detection device 56 is provided for detecting the termination of the feed of the tape-like damping material H, which is wound around a plurality of spools 55 to guide the tape-like damping material H and the spool 54, and for detecting any abnormal rotation of the spool 54. The detection device 56 includes a lever 58 (actuator) having a lower part with a stop section 57 that can engage the tape-like damping material H, and a forked upper part, the lever 58 being rotatably mounted on the shaft 59. The detection device 56 is configured to detect the rotation of the lever 58. When the adjacent section 57 of the lever 58 is adjacent to the tape-like damping material H, the tape-like damping material H assists the rotation of the adjacent section 57 of the lever 58 by means of the weight of the lever 58.When the tape-like damping material H is completely used up, causing it to run out, the lever 58 rotates counterclockwise. This rotation allows the running out of the tape-like damping material H to be detected. If the spool 54 has not rotated for any reason, the tape-like damping material H becomes taut, raising the adjacent section 57 and causing the lever 58 to rotate counterclockwise. The detection device 56 can detect the deviation in the rotation of the spool 54 by sensing the rotation of the lever 58. As described above, the tape feed mechanism 8 (damping material feed mechanism) is configured to feed the tape-like damping material H in the forward / reverse direction (Y-direction). <Bandartiges Dämpfungsmaterial H (Dämpfungsmaterial)>

[0043] The strip-shaped damping material H is a damping material made of strip-shaped resin or the like, with a width of approximately 10 mm and a thickness of approximately 0.5 mm. It should be noted that the size and thickness of the strip-shaped damping material H are not limited as described above and can be applied according to the size of the punch 17. <Verfahren zur Einstellung des Dämpfungsmaterials H>

[0044] The following describes the procedure for adjusting the tape-shaped damping material H. First, the tape-shaped damping material H, which is wound around the coil 54, can be attached to the coil support section 50. The tape-shaped damping material H can then be guided to the front of the receiving base 6 while being hooked onto each of the coils 55.

[0045] The band-like damping material H can then be introduced from the inlet 31 of the retaining element 23 towards the punching base 30. The band-like damping material H can be guided to the outlet 32 ​​of the retaining element 23 along the top of the receiving element 30b of the punching base 30b and along the guide section 36b, which is formed on the underside of the receiving plate 36.

[0046] The handle 42 can then be rotated while the band-like damping material H is further inserted to supply the band-like damping material H when the band-like damping material H reaches the intake area 37. <Zuführung des bandförmigen Dämpfungsmaterials H>

[0047] The following describes the feeding process of the band-shaped cushioning material H. After the band-shaped cushioning material H has set, the perforation head 4 performs a perforation process on the leather sheet according to the perforation pattern data (or embroidery pattern data), while the holding frame 14, which holds the leather sheet as a workpiece, is moved in the XY direction on the top of the sewing machine table 9. During the perforation process by the perforation head 4, the band feeding mechanism 8 can operate as described below.

[0048] According to the perforation pattern data, the leather sheet can be moved into a position where perforation is to be performed. The selected punches 17 of the perforation head 4 can be lowered and inserted into the leather sheet (a perforating blade 17b of the punch 17 contacts the band-like damping material H, creating a punched mark). The punches 17 can then be raised and removed from the leather sheet to form perforations in the leather sheet. After the punches 17 have been removed from the leather sheet, the leather sheet can be moved to a subsequent perforation position. Before the punches 17 pierce the leather sheet, the motor 40 for the feed area 37 can be actuated so that the drive coil 41 rotates counterclockwise at an angle corresponding to a predetermined feed height.This allows the ribbon-like damping material H to be fed in the transport direction, and a portion of the ribbon-like damping material H on the receiving element 30b of the die base 30 can be replaced by another portion. This movement is repeated so that the ribbon-like damping material H can be fed to each perforation process at a predetermined inclination, with a section of the ribbon-like damping material H on the receiving element 30b of the die base 30 being replaced by another section. A collection box or shredder device for collecting the used ribbon-like material H that is fed in can be provided below the lower frame 7. <Zuführneigung des bandförmigen Dämpfungsmaterials H>

[0049] The feed angle of the strip-shaped damping material H can be set as desired on an operating display. This setting allows, for example, the surface of the strip-shaped damping material H, which is positioned on the receiving element 30b (i.e., the surface on which the punch makes contact), to be shifted so that the surface is always new, or so that some of the punched marks can be overlapped with some of the previously punched marks by reducing the feed angle. Furthermore, the feed angle can be recorded for each size or type of punch 17. The perforation head 4 can accommodate a variety of punches 17, and the angle for each size / type of punch 17 can be recorded. This allows the feed angle to be automatically switched according to the punch 17 when the punch 17 is switched to the punch 17 actually in use.If the leather sheet is transferred to a subsequent process, such as embroidery, after completion of the perforation process, the leather sheet can be moved under the embroidery head 3 while being held in the holding frame 14, and vice versa, the embroidery process can be carried out.

[0050] As described above, the main body 1 of the embroidery machine according to the first embodiment has the following effects. The band-shaped feed mechanism 8 (damping material feed mechanism) can help to reduce the wear of the band-shaped damping material H used, since the damping material H is fed with a greater width than the processing area of ​​at least the punches (perforation tools) 17, its position being shifted by the vertical reciprocal movement of the punches 17. Furthermore, a deterioration in the reliability of the perforation process due to irregularities caused by the punched mark can be reduced, since the damping material H is fed sequentially with the remaining punched mark. In other words, the perforation quality can be kept constant.Furthermore, the leather sheet (workpiece) can be easily transferred to a subsequent process after the perforation process because the belt feed mechanism 8 is configured to feed the strip-like damping material H separately from the leather sheet (workpiece), which is held in the holding frame 14. Moreover, even if the strip-like damping material H needs to be replaced during the perforation process, it can be exchanged without removing the leather sheet from the holding frame 14, thus improving the efficiency of the exchange operation. It is also possible to prevent the machine from expanding in the right / left direction because the belt feed mechanism 8 is configured to feed the strip-like damping material H from the forward / reverse direction. This is particularly noteworthy in a machine configured to have multiple perforation heads 4.

[0051] The machine can also be prevented from expanding in the right / left direction because the tape feed mechanism 8 is configured so that the spool 54, around which the tape-shaped damping material H is wound, is carried along the front / rear direction to the lower frame 7, which supports the receiving base 6 under the perforating head 4.

[0052] The tape feed mechanism 8 (damping material feed mechanism) can include a feed section 37 configured to feed the tape-like damping material H between the leather sheet (workpiece) held in the retaining frame 14 and the top of the receiving element 30b. The detection device 56 (detection mechanism) provides the feed channel for feeding the tape-like damping material H from the spool 54 to the feed section 37, the detection device 56 serving to detect the feeding state of the tape-like damping material H by the rotatable lever 58 (actuator) according to the tension applied to the tape-like damping material H.

[0053] The tape feed mechanism 8 has a compact design, as the feed section 37 is built into the receiving base 6.

[0054] The successive perforation processes can be carried out because the control means are provided to control the holding frame 14 to move in the two-dimensional direction in response to the command based on the pre-stored data.

[0055] The receiving base 6 can include a receiving plate 36 with a window opening 36a through which the punch 17 can be inserted. The receiving plate 36 is provided with a guide section 36b on its rear side, the guide section 36b serving to limit the movement of the ribbon-shaped damping material H in the lateral direction through the window opening 36a and also to limit the removal of the ribbon-shaped damping material H from the window opening 36a. Therefore, the ribbon-shaped damping material H can be fed in a stable manner, since its movement is restricted both in the lateral direction and in its removal from the window opening 36a.

[0056] The guide section 36b can gently feed the ribbon-like damping material H to the feed section 37, since the guide section 36b is configured to guide the ribbon-like damping material H through the convexly curved surface facing the punches 17 to the feed section 37.

[0057] The waste of the supplied quantity of strip-shaped damping material H can be further reduced because the strip-shaped feeding mechanism 8 is configured to allow adjustment of the feeding inclination of the strip-shaped damping material H. Furthermore, the work efficiency of the perforation process can be improved because the feed quantity can be switched according to the shape, surface, etc., of the punches 17 (perforation tools).

[0058] The perforation head 4 can accommodate a variety of punches 17 with different planar shapes. The band feed mechanism 8 can be configured to automatically adjust the feed rate of the band-shaped damping material H when switching between the different punches 17. This improves both the flexibility of the perforation formation and the work efficiency of the perforation process, as it is configured to automatically switch the feed rate of the band-shaped damping material H according to the different punches 17.

[0059] If the main body of the embroidery machine 1 includes a perforating device with the perforation head 4 and the embroidery head 3 with a needle on the vertically reciprocating needle bar and its front end, the sewing machine can be configured to easily perform the perforation process and the embroidery process. <Zweite Ausführungsform>

[0060] The second embodiment will be described below with reference to the Fig. 12 to 14 are described. The same reference numbers are assigned to the same configurations, which are identical to the configurations according to the first embodiment, and a detailed description of the same configurations is omitted.

[0061] In the second embodiment, as in the Fig.As shown in Figures 12 to 14, the feed section 37 is arranged outside the receiving base 6. Depending on the type of leather sheet, significant fiber lint may accumulate on the reverse side. If such a leather sheet is subjected to a perforation process, especially if the material is sticky, the fiber lint on the reverse side of the leather sheet can adhere to the band-like damping material H, allowing the fiber lint to remain in the feed section 37 during the perforation process. The second embodiment differs from the first embodiment in that maintenance is facilitated by locating the feed section 37 on the outside of the receiving base 6.

[0062] The receiving base 6 according to the second embodiment is provided with guides 49a and 49b and guide coils 62 behind the punching base 30. The 49a, 49b, and 62 serve to guide the strip-like damping material H to the outlet 48 provided in the base plate 6a of the receiving base 6. Furthermore, a support element 63 is provided in front of the outlet 48 to lift the strip-like damping material H and prevent it from hanging down and / or touching the base plate 6a. The support element 63 is attached to a support base 51 for a coil support section 50 such that its vertical position can be adjusted, and it has a slot 64 at its upper end through which the strip-like damping material H is inserted.

[0063] The feed section 37 is located below the receiving base 6 and is housed in a box 66. The box 66 is attached to the support base 65, which projects forward from the lower frame 7. A cover plate 67 for the box 66 is formed with an inlet 68 for the ribbon-like damping material H. An underside of the box 66 is open as an outlet for the ribbon-like damping material H and is provided with a guide 69. The feed section 37 within the box 66 comprises a drive coil 41 (not shown) and a driven coil 45 (not shown), which, as in the first embodiment, are axially supported on the motor 40 and are configured to feed the ribbon-like damping material H under the box 66 according to the rotation of the drive coil 41.

[0064] The detection device 70 for the coil holder section 50 is described below. The detection device 70 serves to detect the termination of the feed of the ribbon-shaped damping material H wound around the coil 54 and / or abnormal rotation of the coil 54 in a manner similar to the first embodiment. The detection device 70 is provided on a mounting plate 71, which is attached to the support base 51 for the coil holder section 50.The mounting plate 71 is provided with: a first coil 72 (inverting element) that allows the ribbon-shaped damping material H supplied by the coil 54 to invert downwards; a second coil 73 that allows the ribbon-shaped damping material H inverted at the first coil 72 to invert upwards; and a third coil 74 that allows the ribbon-shaped damping material H inverted at the second coil 73 to invert towards the receiving base 6. The first coil 72 and the third coil 74 are rotatably mounted axially at predetermined positions on the mounting plate 71, while the second coil 73 is rotatably mounted axially on the upper section of a movable body 75.The movable body 75 includes two guide grooves 77, into each of which a screw 76 attached to the mounting plate 71 engages, so that the movable body 75 is mounted to move vertically along the guide grooves 77. This allows the movable body 75 to be moved vertically by the force exerted on the second coil 73. When tension is applied to the ribbon-shaped damping material H, the second coil 73 is raised to move the movable body 75 upwards. The movable body 75 is lowered to its own weight when the ribbon-shaped damping material H is released or completely consumed.

[0065] A guide shaft 79 is attached to the lower section of the movable body 75. The guide shaft is configured to allow the movable body 75 to move linearly and vertically via a connecting block 78. A displacement element 80 (actuator) with a rearward-facing T-shape is attached to the side of the displacement element 80. The displacement element 80 incorporates magnets 82 at each of the front ends of a vertical section 81 and is linearly movable in a vertical direction integral with the movable body 75. Furthermore, a magnetic sensor 83 can be provided in a position relative to the vertical section 81 of the displacement element 80 to detect the magnetism generated by the magnets 82.

[0066] Due to these configurations, the detection device 70 can function as follows. When the ribbon-shaped damping material H wound around the coil 54 is fully supplied, the displacement element 80 (actuator) is lowered under the weight of the movable body 75. The magnetic sensor 83 detects the magnet 82 at the upper end of the vertical section 81 and thus detects the discharge of the ribbon-shaped damping material H. If the abnormal condition is caused by the coil 54 not having rotated for any reason, the ribbon-shaped damping material H is tensioned, thereby raising the second coil 73. The displacement element 80 is also raised with the movable body 75, so that the magnet 82 at the lower end of the vertical section 81 of the displacement element 80 is detected by the magnetic sensor 83, and the deviation in the rotation of the coil 54 can be detected.

[0067] The tape feed mechanism 8 (damping material feed mechanism) can include a feed section 37 configured to feed the tape-like damping material H between a leather sheet (workpiece) held in the retaining frame 14 and the top of the receiving element 30b. A detection device 70 (detection mechanism) is provided on the feed channel of the tape-like damping material H, which is fed from the spool 54 to the feed section 37. The detection device 70 is configured to detect the feeding status of the tape-like damping material H by means of the displacement element 80 (actuator), which is displaceably moved according to the tension exerted on the tape-like damping material H. This configuration can determine whether the tape-like damping material H is fed stably or not.

[0068] The detection device 70 can include a second coil 73 for guiding the ribbon-shaped damping material H, a movable body 75 that axially rotatably supports the second coil 73 and slides with the second coil 73 according to the level of the voltage applied to it, a displacement element 80 (actuator) supported on the movable body 75, and a magnetic sensor 83 for detecting the slide movement of the displacement element 80. Therefore, it is possible to determine whether the ribbon-shaped damping material H is being fed stably by detecting whether the second coil 73 for guiding the ribbon-shaped damping material H is positioned appropriately when the ribbon-shaped damping material H is fed from the coil 54 to the feed section 37.

[0069] The displacement element 80 moves upwards when the second coil 73 is raised, when tension is applied to the ribbon-shaped damping material H in response to the abnormal rotation of the coil 54. Conversely, the displacement element 80 moves downwards due to the weight of the moving body 75 when the damping material wound around the coil 54 is fully inserted or released while tension is not applied to the damping material H. Therefore, the displacement element 80 (actuator) can detect the delay or cessation of the insertion of the ribbon-shaped damping material H due to the rotational anomaly of the coil 54, or the completion of the insertion or release of the ribbon-shaped damping material H wound around the coil 54, according to the upward or downward movement of the moving body 75 supporting the second coil 73. <Eine andere Ausführungsform>

[0070] According to the first and second embodiments 1 and 2, an example was shown in which the sewing process with the embroidery thread is carried out after the perforation process, as they depicted the main body of the embroidery saw machine as an example. However, according to another embodiment, it is not necessary to carry out the embroidery sewing process after the perforation process; instead, a decoration process can be chosen in which only the perforation process is carried out, without performing the embroidery after the perforation process. In this case, different punches 17 of varying sizes and / or shapes can be set on each of the lifting rods 15, and the control means can selectively control each of the lifting rods 15 to form different types of perforation decorations (decorative patterns formed solely by the perforation patterns).

[0071] In the first and second embodiments, only one pair of embroidery heads 3 and perforation heads 4 is provided; however, this is not limited to other embodiments, and in another embodiment, a plurality of embroidery heads 3 and perforation heads 4 can be provided. As a further embodiment, a perforating device can be provided with only a plurality of perforation heads 4.

[0072] In the second embodiment, the displacement element 80 and the movable body 75 are shown as separate elements as an actuator, however, the displacement element 80 and the movable body 75 can be integrated to comprise an actuator.

[0073] Although the exemplary embodiments according to the present disclosure have been described above, the perforating device and the embroidery sewing machine with the perforating device of the present disclosure are not limited to the present embodiments, but can be applied in various other forms.

Claims

[1] Perforating device comprising: a perforation head (4) with a vertically reciprocating rod (15) and a perforation tool (17) provided at a front end of the rod (15); a receiving base (6) arranged below the perforation head (4), wherein the receiving base (6) includes a receiving element (30b) configured to receive the perforation tool (17) which is lowered according to the lowering movement of the rod (15); a holding frame (14) configured to support a workpiece in an expanded state between the perforation tool (17) and the receiving base (6) in a planar direction orthogonal to the vertical direction of the rod (15), wherein the holding frame (14) is configured to be controlled to move in a two-dimensional direction, such as in a forward / backward direction of the plane and a right / left direction orthogonal to the forward / backward direction; and a damping material feeding mechanism (8) configured to feed a ribbon-like damping material (H) with a greater width than at least one working area of ​​the perforation tool (17), wherein the mechanism (8) feeds the material from the forward / reverse direction between the workpiece held in the holding frame (14) and a top surface of the receiving element (30b), wherein the mechanism (8) displaces damping material (H) at a speed corresponding to the vertical reciprocal movement of the perforation tool (17). [2] Perforating device according to claim 1, wherein the feed mechanism (8) for the damping material includes a coil (54) on which the damping material (H) is wound around the coil (54), and wherein the coil (54) is supported on a frame (7) which is designed to support the receiving base (6) such that the coil (54) is supported along the forward / backward direction below the perforation head (4). [3] Perforating device according to claim 1 or 2, wherein the feed mechanism (8) for the damping material includes a feed section (37) configured to feed the damping material (H) between the workpiece held in the holding frame (14) and the top of the receiving element (30b), and wherein a detection mechanism (56) is provided within a feed channel of the damping material (H) from the spool (54) to the feed section (37), wherein the detection mechanism (56) is configured to detect the feed state of the damping material (H) by means of an actuator (58) capable of moving according to the tension applied to the damping material (H). [4] Perforating device according to claim 1, 2 or 3, wherein the feed section (37) is formed within the receiving base (6). [5] Perforating device according to claim 3, wherein the detection mechanism (56) comprises: an inverting element (73) configured to guide the damping material (H); a movable body (75) configured to support the inverting element (73) in an axially rotatable manner, wherein the movable body (75) is configured to move slidably together with the inverting element (73) in response to the level of stress exerted on the inverting element (73) by the damping material (H); a displacement element (80) which is carried on the movable body (75); and a sensor (83) configured to detect the sliding movement of the displacement element (80). [6] Perforating device according to claim 5, wherein the displacement element (80) is configured to move upwards when the inverting element (73) is raised when tension is applied to the damping material (H) due to an abnormal rotation of the coil (54), and wherein the displacement element (80) is configured to move downwards due to the weight of the movable body (75) when the damping material (H) wound around the coil (54) is fully fed in or released while tension is not applied to the damping material (H). [7] Perforating device according to claim 1, 2, 3, 4, 5 or 6, wherein the receiving base (6) includes a receiving plate (36) with a window hole (36a) into which the perforating tool (17) can be inserted, and wherein a guide (36b) is provided on a rear side of the receiving plate (36), wherein the guide (36b) is configured to prevent the damping material (H) from moving in the width direction relative to the window hole (36a), and furthermore prevents the damping material (H) from being removed from the window hole (36a). [8] Perforating device according to claim 7, wherein the guide (36b) is configured to guide the damping material (H) to the feed section (37) through a convexly curved surface directed towards the perforating tool (17). [9] Perforating device according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the feed mechanism (8) for the damping material is configured to be able to change the feed inclination of the damping material (H). [10] Perforating device according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein the perforation head (4) includes a plurality of perforation tools (17) with different planar shapes, and wherein the damping material feed mechanism (8) is configured to be able to switch the feed inclination of the damping material (H) according to switching the different perforation tools (17). [11] Embroidery sewing machine comprising the perforating device according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, and an embroidery head (3) comprising a vertically reciprocating needle bar (15) and a sewing needle at a front end of the needle bar (15).

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