JP2012245096A - Sewing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewing apparatus which can perform sewing without displacement.SOLUTION: The sewing apparatus includes: a work table 30 for placing two fabrics C1 and C2 lapped over each other; a lock sewing machine 40 for sewing the tow fabrics; a carrying mechanism 50 for carrying the lock sewing machine along an edge brim part of the work table; and a front clamp mechanism 60 having a plurality of clamp members 611 arranged side by side along the edge brim part 32 of the work table, for holding the two fabrics from above. In the lock sewing machine, a cloth presser 43 is arranged adjacent to the edge brim part of the work table, and a sewing needle 41 on a side of the work table performs needle dropping to a side end part 43a of the cloth presser on the side of the worktable, and tip ends of the plurality of clamp members are positioned at an edge of the edge brim part of the work table.

Description

  The present invention is a sewing device for sewing and joining end edges of large-sized fabrics.

When manufacturing a sewn product made of a large-sized fabric, for example, a large-sized curtain, it is a common practice to connect curtain fabrics to form a larger curtain.
In that case, the edges of the two curtains are sewn together, but the sewing operation involves two-needle overlock sewing machine or interlock sewing machine that is formed in parallel along the seam allowance. Etc. have been used (see, for example, Patent Document 1).

Japanese Patent No. 3553476

By the way, it is very difficult to manually feed the large cloth to the lock sewing machine.
For this reason, place two pieces of fabric on a long work table, and lock along the edge of the work table without moving the fabric while protruding the seam allowance from the edge of the work table. Conventionally, a sewing apparatus that performs sewing while transporting a sewing machine has been used.
When using this kind of sewing device to sew fabrics that have patterns or patterns that intersect with the edges of the fabric, the top and bottom fabrics can be fed using top and bottom feeds. Since the teeth are in contact with each other intermittently, there will be a difference in the feed amount of the upper and lower fabrics, and even if the upper and lower fabrics are aligned so that the patterns and patterns match in advance, the patterns and patterns will shift from the middle. There was a problem that.
In order to cope with this problem, it is conceivable to provide a clamp for pressing from above the cloth along the edge of the workbench. However, since the sewing machine is transported at the edge of the workbench, In order to avoid interference with the feed dog and the feed dog, the clamp could not be brought close to the needle drop position, and even if the clamp was used, the upper and lower fabric patterns and patterns could not be sufficiently suppressed.

  An object of the present invention is to realize high-quality sewing in which a pattern or a pattern is not displaced in stitching of fabrics having a pattern or a pattern.

The invention described in claim 1
A sewing device for joining two pieces of fabric with a linear seam at one end of each other,
A workbench on which the two doughs are stacked and placed in a state in which the end part to be joined projects from the edge part;
A lock sewing machine comprising a two-needle overlock sewing machine or an interlock sewing machine for performing sewing for joining the two pieces of fabric;
A transport mechanism for transporting the lock sewing machine along an edge of the work table during the sewing;
A front clamp mechanism in which a plurality of clamp members that hold the two doughs from above are arranged side by side along an edge of the work table,
In the lock sewing machine, the cloth presser is disposed adjacent to the edge of the work table, and the sewing needle on the work table side performs needle dropping on the side end part of the work press on the work table side. ,
The position of the front-end | tip part of these clamp members was match | combined with the position of the edge of the edge part of the said work bench | platform.

The invention according to claim 2 has the same configuration as the invention according to claim 1,
The front end portion of each clamp member of the front clamp mechanism is a side end portion of the cloth presser within a range of 5 [mm] from a straight line along a conveying direction passing through a needle drop position of the sewing needle on the work table side. The sewing apparatus according to claim 1, wherein the sewing apparatus is extended to the end.

  The invention described in claim 3 has the same configuration as that of the invention described in claim 1 or 2, and the front clamp mechanism is configured such that the plurality of clamp members and their support mechanisms can be retracted upward. To do.

  The invention described in claim 4 has the same configuration as that of the invention described in any one of claims 1 to 3, and the transport mechanism is sewn by torque of a motor that is a drive source for sewing the lock sewing machine. It is characterized by carrying the sewing machine at the time.

The invention according to claim 5 has the same configuration as that of the invention according to any one of claims 1 to 4, and a rear clamp that temporarily holds the first cloth placed on the work table. Equipped with a mechanism
The rear clamp mechanism includes a lower plate disposed on the front side of an end edge portion of the work table at the same height as the work table, and an end portion of the first cloth protruding from above the lower plate. A holding member, and a retraction mechanism that retreats the lower plate and the clamping member from a conveyance area of the lock sewing machine are provided.

In the first aspect of the invention, the cloth presser of the lock sewing machine is disposed adjacent to the end edge of the work table, and the sewing needle on the work table side drops the needle against the side end portion of the work press on the work table side. Since it is set as a structure, the edge part of a workbench can be arrange | positioned more closely with respect to the needle drop position of the sewing needle by the side of a workbench, without interfering with cloth presser.
Then, by extending the tip of the clamp member to the position at the edge of the workbench, two pieces of cloth are formed by the clamp member and the workbench at a position closer to the needle drop position of the sewing needle on the workbench side. Can be held.
For this reason, even when the lock sewing machine performs sewing while transporting by the transport mechanism, the upper and lower fabrics are effectively held, and even if there are patterns or patterns on the upper and lower fabrics, stitching without stitching can be performed. Can be done.
This also eliminates the need for vertical feed, enables high-speed sewing, and simplifies the configuration of the apparatus and reduces costs.

According to a second aspect of the present invention, the front end portion of each clamp member of the front clamp mechanism is pressed down to a range within 5 mm from a straight line along the conveying direction passing through the needle drop position of the sewing needle on the work table side. It extends to the side edge part side. This is based on the result that due to the trial and error of the inventor, a sufficient effect cannot be obtained when the distance is 10 [mm], and a favorable effect is obtained when the distance is within 5 [mm].
Of course, 0 is not included even within 5 [mm]. It is assumed that there is no interference between the cloth presser and the clamp member and it is within 5 [mm].

  According to the third aspect of the present invention, the plurality of clamp members and the support mechanisms thereof can be retracted upward, so that the work of placing the cloth on the work table can be easily performed before clamping.

  In the invention according to claim 4, since the conveyance mechanism performs the sewing machine conveyance at the time of sewing by the torque of the motor which is a drive source for sewing the lock sewing machine, the movement amount (sewing pitch) by the conveyance of each needle is made uniform. Can be more easily synchronized. This eliminates the need for an expensive configuration such as a servo mechanism for increasing the synchronization accuracy, and makes it possible to improve the sewing quality at a low cost.

Since the invention according to claim 5 is provided with the rear clamp mechanism, the first cloth placed on the work table can be temporarily pressed, and when the second cloth is placed and the position is adjusted. Therefore, it is possible to prevent the lower fabric from moving together, to improve workability and to prevent the sewn fabric from shifting.
Further, since the rear clamp mechanism includes a retraction mechanism that retracts the lower plate and the clamp member, it does not hinder the conveyance of the lock sewing machine during sewing.

It is a perspective view of the sewing apparatus which is embodiment of invention. It is a top view of the periphery of a work table. It is a perspective view which shows the circumference | surroundings of the sewing needle of an interlock sewing machine. 4A is a plan view of the cloth presser of the interlock sewing machine, and FIG. 4B is a plan view of the needle plate. It is a perspective view of a conveyance mechanism and an interlock sewing machine at the time of making a back clamp mechanism into a retracted state. It is a top view of a near side clamp mechanism. FIG. 7A is a partially cutaway side view of the front clamp mechanism, and FIG. 7B is an enlarged plan view showing a configuration around one clamp plate. It is operation | movement explanatory drawing of a evacuation mechanism. It is a side view of a back clamp mechanism. It is the enlarged plan view which showed the structure of the circumference | surroundings of one clamp board. It is state explanatory drawing of the three-stage alignment of a lower board. It is a perspective view of a cloth conveyance mechanism. It is operation | movement explanatory drawing which shows operation | movement of the sewing device of the curtain place which performs side alignment, and operation | movement advances in order of FIG. 13 (A) to FIG. 13 (G).

[Outline of Embodiment of the Invention]
Hereinafter, the sewing apparatus 10 which is an embodiment of the invention will be described with reference to FIGS. The sewing apparatus 10 is an example of a sewing apparatus that is suitable for performing stitching by stitching together linear end portions of two large-sized fabrics (specifically, curtain fabric C).

  The sewing apparatus 10 includes a base 20 that supports the whole, a work table 30 that is supported by the base 20, an interlock sewing machine 40 that performs sewing for joining two pieces of fabric, and a work table 30 that is used during sewing. A transport mechanism 50 that transports the interlock sewing machine 40 along the edge, and a front clamp mechanism 60 in which a plurality of clamp members 611 that hold two pieces of cloth from above are arranged along the edge of the work table. And a post-clamp mechanism 70 for temporarily holding the first curtain place C1 placed on the work table 30 when setting the curtain places C1 and C2, and the sewing start side of the first curtain place C1 A start position holding mechanism 80 for holding the end portion and an end edge portion of the work table 30 are provided adjacent to the end edge portion of the work table 30, hold the end portion on the sewing end side of the first curtain place C1, and Along the edge A fabric transport mechanism 90 to move toward the downstream side in the conveying direction at the time of sewing of Kkumishin 40, and a control device (not shown) controls the operation of the respective units.

In the following description, the horizontal direction in which the interlock sewing machine 40 is transported is referred to as the “X-axis direction”, the transport direction during sewing is referred to as the “X-axis forward direction”, and the opposite direction. It is defined as “X-axis reverse direction”.
In addition, a horizontal direction that is orthogonal to the X-axis direction is referred to as a “Y-axis direction”, and a direction in which the interlock sewing machine 40 is located with respect to the work table 30 in FIG. The direction is defined as “Y-axis reverse direction”.
The vertical vertical direction is defined as “Z-axis direction” or “vertical direction”.

[Base and work table]
The base 20 includes two side plates 21, 21 along the YZ plane, struts 22, 23 spanned between the two side plates 21, 21, and leg portions 24 provided on the struts 23. , 24, 24.

The work table 30 is an internal hollow metal columnar body whose cross-sectional shape along the YZ plane is substantially rectangular, and the upper surface thereof is a long fabric placing surface 31 along the X-axis direction. Yes. For example, the cloth placement surface 31 has a length of about 5 [m] along the X-axis direction, and the curtain places C1 and C2 have a sewing distance of 4 [m] for sewing. Can be placed.
The work table 30 is also spanned between the side plates 21 and 21 of the base 20, and both end portions thereof are fixedly supported by the side plates 21 and 21. Moreover, in this support state, the fabric placing surface 31 of the work table 30 is supported so as to be horizontal.

  FIG. 2 is a plan view of the periphery of the work table 30, and as shown in FIG. 2, the end edge portion 32 on the interlock sewing machine 40 side of the fabric placement surface 31 of the work table 30 is a straight line along the X-axis direction. It is formed in a shape. The curtain grounds C1 and C2 are placed in a state of being overlaid on the fabric placement surface 31 (C2 is on the upper side) and protruding from the end edge part 32 as an end portion that is a seam allowance. Sewing (edge stitching and double chain stitching) is performed on the protruding ends of C1 and C2.

[Interlock sewing machine]
3 is a perspective view showing the periphery of the sewing needles 41 and 42 of the interlock sewing machine 40, FIG. 4A is a plan view of the cloth presser 43 of the interlock sewing machine 40, and FIG. It is a top view.
The interlock sewing machine 40 has substantially the same configuration as a well-known machine, and only a part thereof is subjected to processing suitable for sewing by the sewing apparatus 10. Therefore, here, a configuration well-known as an interlock sewing machine will not be mentioned, and only a characteristic part will be mainly described.

The interlock sewing machine 40 includes two sewing needles 41 and 42, and the sewing needle 41 on the Y-axis reverse direction side (closer to the work table 30) performs double chain stitching, and the Y-axis positive direction side (work table). The sewing needle 42 farther from 30) is used for edge stitching.
The interlock sewing machine 40 is provided with a cloth presser 43 supported by an arm 45 so as to be pivotable up and down, below the sewing needles 41 and 42, and further below the needle plate 44 on the upper surface of the sewing machine bed. Is arranged.

The cloth presser 43 is pressed downward via the arm 45, which is used to enable the formation of an empty ring and the prevention of skipping in a state where there is no double ring stitch or edge stitch fabric. Is. That is, in the interlock sewing machine 40, the curtain grounds C1 and C2 do not move, and the sewing machine 40 advances in the conveyance direction by the conveyance mechanism 50, so that the pressurization force necessary for feeding the fabric backward is unnecessary. The minimum necessary pressure is applied to prevent the air ring from being sent out and the occurrence of skipping, which is weaker than this.
As shown in FIG. 4A, the cloth presser 43 is arranged so that the side end portion 43 a on the work table 30 side is formed in a straight line and is close to and opposed to the end edge portion 32 of the work table 30. . Such an arrangement is maintained even when transported by the transport mechanism 50.
Reference numerals H1 and H2 shown in FIG. 4A indicate the needle drop positions of the sewing needles 41 and 42, respectively, and as shown in the figure, the needle drop position H1 of the sewing needle 41 that performs double ring stitching. Is located at the side end 43 a of the cloth presser 43 on the work table 30 side. That is, the cloth presser of the conventional interlock sewing machine is formed in a shape that swells in the reverse direction of the Y axis from the needle drop position H1 of the sewing needle 41 that performs double chain stitching. 43 is a shape in which all the swelling on the work table 30 side is removed so that the needle drop position H1 of the sewing needle 41 for performing double chain stitching is located at the side end portion 43a on the work table 30 side of the cloth presser 43. It has become.
Thereby, it is possible to make the end edge portion 32 of the work table 30 as close as possible to the needle drop position H1 of the sewing needle 41 that performs double chain stitching. The distance from the edge 32 of the work table 30 to the needle drop position H1 of the sewing needle 41 that performs double ring stitching is within 5 [mm], and it is desirable that the distance is within a range that does not cause interference during conveyance. .
In addition, the code | symbol H3 shown to FIG. 4 (A) has shown the knife dropping position of the knife 46 which cuts off the surplus part of the seam allowance in the edge part of curtain fabric C1, C2 at the time of edge stitching.

The needle plate 44 is a plate-like body that is disposed at the same height as the material placement surface 31 of the work table 30 on the upper surface of the sewing machine bed portion.
Symbols H4 and H5 shown in FIG. 4B indicate the needle drop positions of the sewing needles 41 and 42, respectively, and as shown in the figure, the needle drop position H4 of the sewing needle 41 that performs double ring stitching is: The needle plate 44 is positioned at the side end portion 44a on the work table 30 side. In other words, the needle plate of the conventional interlock sewing machine has another opening on the opposite side of the Y axis from the needle drop position H4 of the sewing needle 41 that performs double chain stitching, through which the feed dog can look. However, the needle plate 44 of the interlock sewing machine 40 has a feed dog so that the needle drop position H4 of the sewing needle 41 that performs double chain stitching is located at the side end 44a of the needle plate 44 on the work platform 30 side. It has a shape from which one opening to look into is removed.
Moreover, although the code | symbols 47 and 48 shown to FIG. 4 (B) have shown the 1st and 2nd feed dog arrange | positioned under the needle plate 44, these feed dogs 47 and 48 are also for one line. The feed dog has been removed to make it slimmer.
Accordingly, the end edge portion 32 of the work table 30 can be made as close as possible to the needle drop position H4 of the sewing needle 41 that performs double chain stitching. Naturally, the distance from the edge 32 of the work table 30 to the needle drop position H4 of the sewing needle 41 that performs double chain stitching is also within 5 [mm], and should be closer within a range that does not cause interference during conveyance. desirable.

  FIG. 2 also shows the needle drop position H1 of the sewing needle 41 that performs double chain stitching, and the needle drop position H1 is somewhat from the side end of the interlock sewing machine 40 on the work table 30 side. Although it is located on the Y-axis positive direction side, this is because the upper part (arm part) of the interlock sewing machine 40 has a shape protruding somewhat toward the work table 30 side.

[Transport mechanism]
1 and 2 show a state in which the rear clamp mechanism 70 is disposed on the positive side of the X-axis of the interlock sewing machine 40, the rear clamp mechanism 70 can be retracted upward. .
FIG. 5 is a perspective view of the transport mechanism 50 and the interlock sewing machine 40 when the rear clamp mechanism 70 is in the retracted state.
As illustrated, the base 20 includes a sewing machine support plate 25 on the lower side of the rear clamp mechanism 70. The transport mechanism 50 slides along the slide rail 51 via the two slide rails 51, 51 mounted on the upper surface of the sewing machine support plate 25 along the X-axis direction, and the slide guides 52, 52. A possible sewing machine mounting plate 53 is provided.
Further, an interlock sewing machine 40 and a sewing motor 49 as a sewing drive source are mounted on the upper surface of the sewing machine mounting plate 53, and the transport mechanism 50 outputs the output of the sewing machine motor 49 via the torque transmission mechanism 540. Using the torque, the interlock sewing machine 40 can be conveyed in the positive direction of the X-axis during sewing.
That is, the torque transmission mechanism 540 includes integrated large and small main driving pulleys 541 and 542 provided on the output shaft of the sewing machine motor 49, a driven pulley 543 that transmits torque from the main driving pulley 542 via the timing belt, and a driven A speed reducer 544 that reduces the rotation of the pulley 543 at a predetermined reduction ratio, a first intermediate pulley 545 to which torque from the driven pulley 543 is applied via the speed reducer 544, and a timing belt from the first intermediate pulley 545 A second intermediate pulley 546 to which torque is transmitted via the clutch, a clutch device 547 capable of switching connection and disconnection of torque transmission from the second intermediate pulley 546 to the downstream side in accordance with control of the control device, and a clutch device 547 And a pinion gear 548 to which torque is applied.
The pinion gear 548 meshes with a rack gear 56 provided along the slide rail 51 along the X-axis direction on the upper surface of the sewing machine support plate 25.
Further, the above-described main driving pulley 541 inputs torque for sewing to the power input pulley 40a of the interlock sewing machine 40 via the timing belt.

With this configuration, when the sewing machine motor 49 is driven, the sewing operation of the interlock sewing machine 40 and the conveyance in the X-axis positive direction by the conveyance mechanism 50 are started simultaneously.
Further, since the sewing operation speed of the interlock sewing machine 40 and the conveyance operation speed in the positive direction of the X-axis by the conveyance mechanism 50 are both proportional to the number of rotations of the sewing machine motor 49, the sewing operation speed of the interlock sewing machine 40 and the conveyance operation speed. The transport operation speed in the positive direction of the X axis by the mechanism 50 is also proportional. In other words, the conveyance distance for each stitch of the interlock sewing machine 40, that is, the sewing pitch, can be always constant regardless of the rotational speed of the sewing machine motor 49. Specifically, the transport mechanism 50 is adjusted so that the stitch pitch is 3 [mm] for each stitch.

Further, the transport mechanism 50 includes a belt feeding mechanism (not shown) in the base 20, and the sewing machine mounting plate 53 and the interlock sewing machine 40 are moved in the X-axis reverse direction via a feeding belt 57 connected to the sewing machine mounting plate 53. It is possible to transport to.
That is, a belt feed mechanism (not shown) includes a motor that is a drive source in addition to the sewing machine motor 49, and the interlock sewing machine 40 is conveyed in the positive direction of the X axis during sewing using the sewing machine motor 49 as a drive source. The return operation of the interlock sewing machine 40 to the home position after the end of sewing is performed using a motor other than the sewing machine motor 49 as a drive source.

[Front clamp mechanism]
6 is a plan view of the front clamping mechanism 60, FIG. 7A is a partially cutaway side view, FIG. 7B is an enlarged plan view showing the configuration around one clamp plate 61, and FIG. FIG. 7 is an operation explanatory diagram of a retraction mechanism 65.
The front clamp mechanism 60 includes a plurality of clamp plates 61 that are integrally provided with a plurality of clamp members 611 arranged in parallel, a column 62 that holds the clamp plates 61 aligned in the X-axis direction, and a column An elevating mechanism 63 that applies an elevating operation of each clamp plate 61 with respect to 62, and a retraction mechanism 65 that retreats all the clamp plates 61, the columns 62, and the elevating mechanism 63 upward from the work table 30.

  Both ends of the column 62 are supported by the side plates 21 and 21 of the base 20 along the X-axis direction via the retraction mechanism 65. Each clamp plate 61 is supported on the surface of the support 62 on the Y axis positive direction side via an elevating mechanism 63. The support 62 and the lifting mechanism 63 correspond to a support mechanism for the clamp member 611.

The clamp plate 61 is a flat plate having flexibility, and is formed side by side in a state where a plurality of (for example, nine) clamp members 611 extend in the same direction in a skewer shape.
Each clamp plate 61 is supported by the support column 62 in a state where a plurality (eg, 34) of the clamp plates 61 are arranged in the X-axis direction, and in this support state, the nine clamp members 611 of each clamp plate 61 are also in the X-axis direction. It will be in a line-up state. Further, each clamp member 611 itself is in a state in which the longitudinal direction thereof is along the Y-axis direction, and the tip portion is directed in the Y-axis positive direction.
Each tip end of each clamp member 611 is equipped with a slip stopper made of a resin having a high coefficient of friction, and each end attaches the curtain ground C1, C2 on the cloth placement surface 31 of the work table 30. It can be pressed from above.
Further, when the clamp plate 61 is in the lowered state by the retracting mechanism 65 and the clamp plate 61 is in the lowered state by the lifting mechanism 63, each clamp member 611 has the same tip position as the end edge portion 32 of the work table 30. It is arranged in line. That is, each clamp member 611 can hold the curtain grounds C <b> 1 and C <b> 2 at a position at the end edge portion 32 of the work table 30.
Note that, as described above, the end edge portion 32 of the work table 30 is disposed close to the needle drop position H1 of the sewing needle 41 that performs double chain stitching of the interlock sewing machine 40 within a range of 5 [mm] or less. Therefore, the tip portions of the clamp members 611 are also close to a range within 5 [mm] with respect to the needle drop position H1 of the sewing needle 41 that performs double chain stitching.

One lifting mechanism 63 is provided for each clamp plate 61. The elevating mechanism 63 includes a support block 631 attached to a plane on the Y axis positive direction side of the support column 62, a guide shaft 632 slidable in the vertical vertical direction with respect to the support block 631, and a lower end portion of the guide shaft 632. A holding body 633 that is connected to hold the proximal end portion of the clamp plate 61 and an air cylinder 634 as an elevating actuator mounted on the support block 631 are provided.
In the air cylinder 634, the plunger is directed downward, and the tip of the plunger is connected to the holding body 633. That is, when the plunger of the air cylinder 634 is operated so as to protrude, the clamp plate 61 is lowered. At this time, each clamp member 611 of the clamp plate 61 is formed with a slight gradient so as to descend toward the front end portion thereof, and the front end portion of the clamp plate 611 of the work table 30 is actuated by the operation of the air cylinder 634. , C2 are held in pressure contact.

As shown in FIG. 6, the plurality of lifting mechanisms 63 arranged in the X-axis direction are provided with operation switches 635 for lowering the clamp plate 61 by manual operation every other one. That is, every other clamp plate 61 can be lowered individually. The remaining lifting mechanism 63 that is not provided with the operation switch 635 is provided with an operation switch (not shown) that collectively performs the lowering operation.
Thus, although it is every other one, the clamp plate 61 can be lowered individually, so that the alignment of the curtain grounds C1 and C2 that are long in the X-axis direction is held for each holding range of one clamp plate 61. Therefore, the workability of the alignment work can be improved.
It goes without saying that the operation switch 635 may be provided for all the lifting mechanisms 63.

As shown in FIG. 6, the retraction mechanism 65 is provided at both ends of the support column 62. Since the retraction mechanisms 65 on both sides have the same configuration, only one retraction mechanism will be described with reference to FIG.
The retraction mechanism 65 has a rectangular swing plate 651 supported on the inner side surface of the side plate 21 so as to be swingable around the X axis with the upper end side as a fulcrum, and the swinging mechanism 65 on the inner side surface of the swing plate 651. A guide rail 652 provided along the longitudinal direction of the plate 651, a slide plate 653 that is slidable with respect to the guide rail 652 via a slide guide (not shown) and that holds one end of the column 62, and a swing plate A driving pulley 654 provided in the vicinity of the upper end of 651, a driven pulley 655 provided in the vicinity of the lower end of the swinging plate 651, a timing belt 656 stretched between these pulleys 654 and 655, and a swing An air cylinder 657 is provided as an actuator that swings so that the lower end of the moving plate 651 moves back and forth along the Y-axis direction.

The swing plate can swing with the rotation shaft of the main pulley 654 as a support shaft, and the timing belt 656 stretched between the pulleys 654 and 655 is stretched in a direction parallel to the guide rail 652. Has been. Further, the timing belt 656 is connected to the slide plate 653. As a result, when torque is applied to the main pulley 654, the slide plate 653 and the column 62 can be moved up and down via the timing belt 656.
A drive device for applying torque to the main pulley 654 is provided on the opposite surface of the side plate 21. For example, a motor may be used as such a drive device, but in consideration of instantaneous production of the operation, for example, a direct acting actuator such as an air cylinder or a solenoid is converted into a rotational motion via a belt mechanism. And what is given to the main pulley 654 is employed.

With this configuration, the retracting mechanism 65 applies torque to the main pulley 654 and lowers it along the guide rail in a state where the clamp plate 61 is retracted upward. When the air cylinder 657 is lowered to a predetermined position, the tip of the clamp member 611 of each clamp plate 61 is drawn so as to advance in the positive direction of the Y axis. Thereby, it is possible to make the front-end | tip part of each clamp member 611 approach the sewing needle 41 of the interlock sewing machine 40 most closely.
Thereby, even when the arm portion of the interlock sewing machine 40 is shaped so as to protrude from the sewing needle 41 to the work table 30 side, the descending clamp member 611 can be prevented from interfering with the arm portion of the sewing machine, and each clamp The tip end of the member 611 can be moved forward to the vicinity of the sewing needle 41.

  In order to retract each clamp plate 61, first, the air cylinder 657 is operated to move each clamp member 611 backward in the reverse direction of the Y-axis via the swing plate 651, and then to the main pulley 654. Torque is applied to retract the support 62 and the clamp plates 61 upward.

[Rear clamping mechanism]
FIG. 9 is a side view of the rear clamp mechanism 70, and FIG. 10 is an enlarged plan view showing a configuration around one clamp plate 71.
The foreground clamping mechanism 60 described above is for holding the curtain grounds C1 and C2 at the time of sewing to perform sewing without deviation. However, the clamping mechanism 70 is connected to the work table 30 between the curtain grounds C1 and C2. When performing mutual alignment, only the lower curtain place C1 is held to facilitate the alignment operation, thereby improving workability and sewing quality, and uses thereof are different. .

  The rear clamp mechanism 70 includes a plurality of clamp plates 71 that are integrally provided with a plurality of clamp members 711 arranged in parallel, and holds the clamp plates 71 in a state of being aligned along the X-axis direction, and the curtain ground C1, A ruler 72 for determining the seam allowance by attaching the tip of C2; an elevating mechanism 73 for applying an elevating operation of each clamp plate 71 with respect to the ruler 72; A positioning mechanism 74 that arbitrarily positions in the (Y-axis direction), and a lower plate that is disposed on the front side of the edge portion 32 of the work table 30 so that the upper surface thereof is the same height as the material placement surface 31 of the work table 30. 75, all clamp plates 71, ruler 72, lifting mechanism 73, positioning mechanism 74, lower plate 75 supporting lower plate 75, and lower plate position switching for switching the position of the tip of lower plate 75 in three stages A mechanism 77, and a retracting mechanism 78 for retracting the structure to be supported thereby and post 76 outside the transfer area of the interlock sewing machine 40.

The column 76 is supported by the retracting mechanism 78 in the vicinity of the ends on both sides thereof. A ruler 72 is supported on the surface of the support column 76 on the Y axis opposite direction side so as to be movable along the Y axis direction.
The lower plate 75 includes a rectangular flat plate portion 751 that is long in the X-axis direction, and a vertical plate portion 752 that extends from the end of the flat plate portion 751 on the Y-axis positive direction side along the XZ plane. Yes.
The lower plate 75 is supported so that the flat plate portion 751 is in sliding contact with the bottom surface of the support column 76 and is slidable along the Y-axis direction by the support column 76. The flat plate portion 751 of the lower plate 75 has an upper surface height set to the same height as the material placement surface 31 of the work table 30, and the end portion of the flat plate portion 751 in the direction opposite to the Y axis is the end of the work table 30. It is assumed that the end portions on the seam allowance side of the curtain grounds C1 and C2 can be put in a state of being advanced to the vicinity of the edge portion 32, and the alignment work of the curtain grounds C1 and C2 is performed in that state. Yes.

The ruler 72 is a frame that is long in the X-axis direction and has a substantially U-shaped cross-sectional shape in the X-axis direction. The bottom plate portion 721 protrudes in the direction opposite to the Y axis from the top plate portion 722, and the length of the seam allowance is adjusted by attaching the end portions of the curtain bases C1 and C2 to the tip surface of the bottom plate portion 721. It is possible to perform.
Further, the top plate portion 722 is provided with a lifting mechanism 73 arranged in the X-axis direction, and the clamp plate 71 is supported by the lifting mechanism 73.
The ruler 72 and the lifting mechanism 73 correspond to a support mechanism for the clamp member 711.

The positioning mechanism 74 includes a rack gear 741 slidably supported on the upper surface of the support 76 in the Y-axis direction, a pinion gear 742 that meshes with the rack gear 741, a rotation shaft 743 that fixes and supports the pinion gear 742, and a rotation shaft 743. And a handle 744 that rotates. The rotation shaft 743 is substantially equal to the entire length of the support column 76, and pinion gears 742 are provided at a plurality of locations in the longitudinal direction of the rotation shaft 743, and rack gears 741 are provided at positions where the pinion gears mate with the rotation.
Each rack gear 741 has a tip connected to a ruler 72. By rotating the handle 744, the rack gear 741 and the ruler 72 can be arbitrarily moved in the Y-axis direction via the pinion gear 742. It has become. Thereby, the front end surface of the bottom plate part 721 of the ruler 72 is arbitrarily moved in the Y-axis direction, and the front end positions of the curtain fabrics C1 and C2, that is, the length of the seam allowance can be arbitrarily set.

The clamp plate 71 is a flat plate having flexibility, and is formed side by side in a state where a plurality of (for example, nine) clamp members 711 extend in the same direction in a skewer shape.
Each clamp plate 71 is supported by a ruler 72 in a state where a plurality (for example, 15) of the clamp plates 71 are arranged in the X-axis direction, and in this support state, nine clamp members 711 of each clamp plate 71 are also in the X-axis direction. It will be in a line-up state. The individual clamp members 711 themselves are in a state in which the longitudinal direction thereof is along the Y-axis direction, and the tip portion is directed in the Y-axis reverse direction. That is, each clamp member 711 is in a state in which the clamp member 611 of the front-side clamp mechanism 60 described above and the tip end portions are butted against each other.
In addition, as shown in FIG. 2, the clamp plate 71 is sparsely arranged in the X-axis direction as compared with the clamp plate 61. This is because the function of the clamp member 711 is to place the curtain ground C1 into C2 during alignment. This is because there is not a high demand for preventing positional displacement without a gap over the entire length.

And the tip part of each clamp member 711 is equipped with the slip prevention which consists of resin etc. with a high friction coefficient, and each said tip part presses the curtain ground C1 on the flat plate part 751 of the lower board 75 from upper direction. Is possible.
Further, each clamp member 711 is arranged such that the tip position thereof is separated from the end edge portion 32 of the work table 30 and is arranged at the same position in the Y-axis direction. This is to prevent the dough conveyance mechanism 90 described later from passing between each clamp member 711 and the end edge portion 32 of the work table 30.

One lifting mechanism 73 is provided for each clamp plate 71. The elevating mechanism 73 includes a guide shaft 732 that is slidable vertically with respect to the top plate 722 of the ruler 72, and a holding body 733 that is connected to the lower end portion of the guide shaft 732 and holds the base end portion of the clamp plate 71. And an air cylinder 734 as an elevating actuator mounted on the top plate 722, and an operation switch 731.
In the air cylinder 734, the plunger is directed downward, and the tip of the plunger is connected to the holding body 733. That is, when the operation switch 731 is pushed and the plunger of the air cylinder 734 is operated so as to protrude, the clamp plate 71 is lowered. At this time, each clamp member 711 of the clamp plate 71 is formed in a crank shape so that the tip portion thereof is at a low position, and the tip portion of the clamp plate 711 of the flat plate portion 751 of the lower plate 75 is operated by the operation of the air cylinder 734. The curtain ground C1 is pressed and held on the upper surface.

The lower plate position switching mechanism 77 is capable of switching the position of the tip portion of the lower plate 75 on the work table 30 side to three stages of the most advanced position, the most retracted position, and the intermediate position. The first air cylinder 771 serving as an actuator for switching the lower plate 75 between the most advanced position and the last retracted position, and the second air cylinder 772 serving as an actuator for switching to the intermediate position are provided.
The first air cylinder 771 has a stroke larger than that of the second air cylinder 772, and the lower plate 75 can be switched between the most advanced position and the most retracted position without the plunger of the second air cylinder 772 protruding. it can.
The second air cylinder 772 has a smaller stroke than the first air cylinder 771, but has a higher operating pressure than the first air cylinder 771. Thus, in a state where the first air cylinder 771 sets the lower plate 75 to the most advanced position, the second air cylinder 772 operates to push the lower plate 75 back to an intermediate position retracted from the most advanced position. It is possible to match.

FIG. 11 is an explanatory diagram of the state of the lower plate 75 in three stages of alignment. As shown in the figure, the most advanced position P1 on the lower plate 75 is a state where the tip of the lower plate 75 has advanced to such an extent that it abuts against the end edge 32 of the work table 30. Since there is almost no gap between them, it is very easy to align C2 with respect to the curtain ground C1 when pattern matching is performed.
The intermediate position P <b> 3 on the lower plate 75 is a position where the tip of the lower plate 75 forms a gap with a predetermined width with respect to the end edge portion 32 of the work table 30. This is a position when the fabric transport mechanism 90 that transports the fabric is used, and the gap is wide enough to allow the fabric transport mechanism 90 to pass through.
The last retracted position P <b> 2 on the lower plate 75 is a position where the tip of the lower plate 75 is retracted from the tip of each clamp member 711. In the rear clamp mechanism 70, when the rear clamp mechanism 70 is retracted upward in order to perform sewing after temporarily fixing the tip of the curtain base C1 and performing the position adjustment work of the curtain base C2. In this position, the tip of the lower plate 75 prevents the curtain fabric C1 from rising up.

As shown in FIG. 1, the retraction mechanism 78 includes a rotary shaft 781 that is rotatably supported by the support column 22 of the base 20, a rack gear 782 that is provided in the vertical direction and whose lower end portion is connected to the support column 73, and rotates. A pinion gear (not shown) that is provided on the shaft 781 and meshes with the rack gear 741 and a drive device (not shown) that applies torque to the rotating shaft are provided.
The retracting mechanism 78 applies torque to the rotating shaft under the control of the control device, rotates the pinion gear, and pulls up the support 76 through the rack gear 782, so that the entire rear clamp mechanism 70 is interlocked with the interlock sewing machine. Retreat out of the 40 transport area.

[Start position holding mechanism]
As shown in FIG. 5, the start positioning mechanism 80 is provided on the upper surface of the sewing machine mounting plate 53 adjacent to the downstream side in the transport direction with respect to the interlock sewing machine 40.
The start positioning mechanism 80 applies a gripping pressure for the curtain ground C1 by lowering the pair of gripping members 81 and 82 that hold the sewing start side end of the first curtain ground C1 and the upper gripping member 82. And an air cylinder 83 as an actuator.

[Dough transport mechanism]
FIG. 12 is a perspective view of the dough carrying mechanism 90.
As shown in FIGS. 5 and 12, the fabric transport mechanism 90 slides in the X-axis direction using the slide rail 51 closer to the work table 30 for transporting the interlock sewing machine 40, and curtain fabric C <b> 1. The end portion side of sewing is transported downstream in the transport direction.
The fabric transport mechanism 90 includes a slide guide 91 that can slide relative to the slide rail 51, a support column 92 that is erected upward from the slide guide 91, and a first gripping member that is fixedly supported on the upper end of the support column 92. 93, a second gripping member 94 that can move up and down along two spindles 95 erected from the first gripping member 93, and the first gripping member 93 with respect to the second gripping member 94. An air cylinder 99 serving as an actuator for applying a gripping pressure to the side, an operation switch 96 for manually operating the air cylinder 99, and a lower end portion of the support column 92 are provided to provide a moving operation along the X-axis direction. A conveyance belt 97, a belt conveyance mechanism (not shown) that conveys the conveyance belt 97, and a movement start switch 98 that executes movement of the gripping members 93 and 94 to the downstream side in the conveyance direction are provided.
The first gripping member 93 is in contact with the end edge portion 32 of the work table 30 without a gap, and the upper surface thereof is set to be the same height as the dough placement surface 31.

The start position holding mechanism 80 and the fabric carrying mechanism 90 first set the lower plate 75 to the above-described intermediate position when sewing the stitches of the curtain grounds C1 and C2 that do not require pattern matching. With this operation, the start position holding mechanism 80 is actuated to grip the sewing start end portion of the curtain fabric C1. Next, the operation switch 96 is operated to hold the sewing end portion of the curtain fabric C1 by the holding members 93 and 94. It should be noted that when gripping both ends of the curtain fabric C1, it is necessary to make adjustments in advance so that the cloth end is applied to the ruler 72 and the planned sewing allowance is obtained.
When the movement start switch 98 is operated, the dough carrying mechanism 90 starts moving downstream in the carrying direction, and automatically carries the end portion of the curtain fabric C1. The belt conveyance mechanism of the fabric conveyance mechanism 90 can arbitrarily set its operating torque. For example, if the fabric is easy to stretch according to the quality of the curtain fabric C1, the belt conveyance mechanism 90 generates a stretch by conveying with a weak torque. For example, it is possible to carry out proper dough transportation.

  Further, when adjustment work is performed on the work table 30 so that the pattern or pattern does not shift at the sewing position where the curtain grounds C1 and C2 are joined, the space between the lower plate 75 and the work table 30 is not changed. Since the workability is better when there is no gap, the dough conveying mechanism 90 is not used.

[Pattern sewing operation for sewing device]
In the sewing apparatus 10 having the above-described configuration, an operation in the case of performing the sewing for connecting the curtain grounds C1 and C2, which need to be matched, will be described with reference to the operation explanatory diagram of FIG.
First, when execution of the pattern matching mode is input to the control device, the front clamp mechanism 60 is maintained in the upward retracted state, and the rear clamp mechanism 70 is in the non-retracted state.
Then, the lower plate 75 of the rear clamp mechanism 70 is controlled to be in the most advanced position.
In this state, the ruler 72 is adjusted to a position that provides an appropriate seam allowance, and the curtain place C1 is placed on the fabric placing surface 31 of the work table 30 manually.
Furthermore, the seam margin end of the curtain fabric C1 is brought into contact with the tip of the ruler 72 to accurately adjust the seam allowance (FIG. 13A).

Next, the clamp member 711 of the rear clamp mechanism 70 is lowered to clamp the end portion of the curtain ground C1 (FIG. 13B).
Further, the end portion on the sewing margin side of the curtain fabric C2 is overlaid on the curtain fabric C1 (FIG. 13C).
Then, the front clamping mechanism 60 descends from the retracted position and stands by.
In this state, the curtain ground C2 is adjusted in position along the X-axis direction with respect to the curtain ground C1 in order from one side in the X-axis direction (FIG. 13D), and the position of the holding width of one clamp plate 61 is adjusted. Each time the alignment is completed, the corresponding operation switch 635 is operated, and the clamp plate 61 is lowered and clamped one by one (FIG. 13E). Finally, when clamping by the individual clamp plates 61 is completed, all the clamps are executed by the remaining clamp plates 61 by a collective operation switch.

When the clamping by the front clamping mechanism 60 is completed, the clamping of the clamping member 711 by the rear clamping mechanism 70 is released (FIG. 13F). At the same time, the lower plate 75 moves backward to the last retracted position.
Then, the rear clamping mechanism 70 is retracted upward by the retracting mechanism 78.
Thereafter, the interlocking sewing machine 40 is conveyed while being sewn by driving the sewing machine motor 49, and sewing is performed while matching the patterns of the curtain fabrics C1 and C2.

[Effect of the embodiment of the invention]
In the sewing device 10, the cloth presser 43 of the interlock sewing machine 40 is disposed adjacent to the end edge portion 32 of the work table 30, and the sewing needle 41 performs needle dropping at the side end portion 43 a of the cloth presser 43. Therefore, the edge portion 32 of the work table 30 can be disposed close to the needle drop position H1 without interfering with the cloth presser 43.
Then, by extending the tip of the clamp member 611 to the same position as the end edge portion 32 of the work table 30, the clamp member 611 is curtained at a position closer to the needle drop position H1 of the sewing needle 41 performing double chain stitching. Since the bases C1 and C2 are held, the upper and lower fabrics can be sewn together without causing a deviation due to sewing, and the curtains C1 and C2 having a pattern or a pattern can be sewn together without causing any deviation. It becomes possible.

Further, since the front clamping mechanism 60 can be retracted upward, it is possible to easily perform the work of placing the curtain ground C1 on the work table 30 before clamping.
Furthermore, since the conveyance mechanism 50 of the sewing apparatus 10 performs sewing machine conveyance at the time of sewing by the torque of the sewing machine motor 49 of the interlock sewing machine 40, synchronization for achieving uniform movement amount (sewing pitch) by conveyance of each needle is performed. It becomes possible to take more easily. This eliminates the need for an expensive configuration such as a servo mechanism for increasing the synchronization accuracy, and makes it possible to improve the sewing quality at a low cost.

Furthermore, since the sewing apparatus 10 includes the rear clamp mechanism 70, the curtain place C1 placed on the work table 30 can be temporarily pressed, and when the second curtain place C2 is placed and the position is adjusted. In addition, it is possible to prevent the curtain ground C1 from moving together, and it is possible to improve workability and prevent the fabrics sewn together.
Further, in the rear clamp mechanism 70, when the entire rear clamp mechanism 70 is retracted upward by the retract mechanism 78, the air cylinder 771 moves in advance to the last retracted position of the lower plate 75. It is possible to prevent the curtain place C1 from being turned up.

Furthermore, since the start position holding mechanism 80 and the fabric transporting mechanism 90 that hold the sewing start side end of the curtain fabric C1 are provided, the curtain fabric C1 is automatically transported even when the length of the end to be joined is long. It is possible to improve workability.
Further, when the dough conveying mechanism 90 is operated, the air cylinders 771 and 772 move the lower plate 75 to the intermediate position, so that interference between the dough conveying mechanism 90 and the lower plate 75 can be prevented.

  Further, the rear clamp mechanism 70 includes a ruler 72 that abuts the leading ends of the projected ends of the curtain grounds C1 and C2, and a positioning mechanism 74 that adjusts the position of the ruler 72 in the Y-axis direction. It is possible to freely adjust the length of the projected curtains C1 and C2 and the width of the seam allowance.

In the sewing apparatus 10, the interlock sewing machine 40 is mounted as a lock sewing machine. However, the present invention is not limited to this, and for example, a two-needle overlock sewing machine that performs edge stitching may be mounted.
In that case, it is required to form the cloth presser so that the needle drop of the sewing needle on the workbench side of the two needles is performed on the side end of the cloth presser 43 on the workbench side. Similarly, it is required to form the needle plate 44 and the feed dog so that the needle drop of the sewing needle on the work table side is performed on the side end portion of the needle plate 44 on the work table side.

DESCRIPTION OF SYMBOLS 10 Sewing apparatus 30 Worktable 31 Material mounting surface 32 End edge part 40 Interlock sewing machine 41 Sewing needle which performs double ring stitching (sewing needle on the worktable side)
43 Cloth presser 43a Side end 44 Needle plate 44a Side end 49 Sewing motor 50 Transport mechanism 60 Front clamp mechanism 611 Clamp member 63 Lifting mechanism 65 Retraction mechanism 634 Air cylinder (actuator)
657 Air cylinder (actuator)
70 Rear clamp mechanism 711 Clamp member 72 Ruler 73 Lifting mechanism 75 Lower plate 77 Lower plate position switching mechanism 78 Retraction mechanism 734 Air cylinder (actuator)
771,772 Air cylinder (actuator)
80 Start position holding mechanism 90 Material transport mechanism 83 Air cylinder (actuator)
99 Air cylinder (actuator)
C1 Curtain ground C1, C2 Curtain ground (fabric)
H1, H2 Needle drop position P1 Most advanced position P2 Last retracted position P3 Intermediate position

Claims (5)

A sewing device for joining two pieces of fabric with a linear seam at one end of each other,
A workbench on which the two doughs are stacked and placed in a state in which the end part to be joined projects from the edge part;
A lock sewing machine comprising a two-needle overlock sewing machine or an interlock sewing machine for performing sewing for joining the two pieces of fabric;
A transport mechanism for transporting the lock sewing machine along an edge of the work table during the sewing;
A front clamp mechanism in which a plurality of clamp members that hold the two doughs from above are arranged side by side along an edge of the work table,
In the lock sewing machine, the cloth presser is disposed adjacent to the edge of the work table, and the sewing needle on the work table side performs needle dropping on the side end part of the work press on the work table side. ,
The sewing apparatus according to claim 1, wherein the positions of the front end portions of the plurality of clamp members are matched with the position of the edge of the end edge portion of the work table.   The front end portion of each clamp member of the front clamp mechanism is a side end portion of the cloth presser within a range of 5 [mm] from a straight line along a conveying direction passing through a needle drop position of the sewing needle on the work table side. The sewing apparatus according to claim 1, wherein the sewing apparatus is extended to the end.   The sewing apparatus according to claim 1, wherein the front clamp mechanism is configured to retract the plurality of clamp members and the support mechanism upward.   The sewing apparatus according to any one of claims 1 to 3, wherein the conveyance mechanism conveys the sewing machine during sewing by torque of a motor that is a driving source for sewing the lock sewing machine. A post-clamp mechanism for temporarily holding the first cloth placed on the work table,
The rear clamp mechanism includes a lower plate disposed on the front side of an end edge portion of the work table at the same height as the work table, and an end portion of the first cloth protruding from above the lower plate. The sewing apparatus according to any one of claims 1 to 4, further comprising: a holding clamp member; and a retracting mechanism for retracting the lower plate and the clamp member from a conveyance area of the lock sewing machine.

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