JPH04263895A - Sewing device - Google Patents

Abstract

PURPOSE:To prevent the front part of working cloth from being loosened or getting turned up due to its dead weight or frictional resistance to a work table by constituting an auxiliary cloth holding member, for holding and releasing the working cloth, of an auxiliary clamp control means for holding, feeding and releasing the working cloth. CONSTITUTION:An auxiliary holding member 28 for sliding and feeding working cloth on a work table by synchronizing with a pair of cloth holding members, while holding the tip part of the working cloth, is provided on the further downstream side of the front end cloth holding member positioned on the downstream side of a cycle sewing machine. The auxiliary holding member 28 consists of a supporting plate 29 fixed to a rack which extends in the longitudinal direction in a machine frame, an oscillating arm 30 whose one end is supported pivotally by the supporting plate 29 so as to be freely rotatable, an auxiliary clamp cylinder 32 for oscillating the oscillating arm 30 against a suppressing spring 31 connected to the other end of the oscillating arm 30, a clamp arm 33 connected to the oscillating arm 30, an auxiliary clamp 35 attached to its tip and a control means.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a sewing device, in particular, to a sewing device capable of continuously sewing buttons or holes on a long piece of work cloth by alternately repeating machine stitching and cloth feeding multiple times. The present invention relates to a sewing device.

0002

[Prior Art] Normally, in this type of sewing machine, the length of the work table is set to match the length of the shirt to be processed most often, so it is difficult to process fabrics for long garments such as white coats or nightgowns. In order to sew, it was necessary to lengthen the work table accordingly. As a sewing device used for such purposes, for example, Japanese Patent Application Laid-Open No. 61-1994
There is one shown in Publication No. 677.

In such a sewing device, as shown in FIGS. 5 and 6, a work table 2 extending left and right and a machine table 3 located behind the machine frame 1 are respectively fixed to the upper surface of the machine frame 1. A cycle sewing machine 4 is installed on the top surface of the table 3. An arm portion 5 of the cycle sewing machine 4 extends forward, and a needle 6 is supported at its tip so as to be movable up and down. The cycle sewing machine 4 is configured to be able to sew a button to a sewing location P of the work cloth W in each sewing cycle by cooperation of the needle 6 and the button holding arm. A button supply device 7 and a button hopper 8 are arranged on the upper surface of the machine table 3, and buttons are supplied one by one to the button holding arm of the cycle sewing machine 4 via the button supply device 7. Note that 9 is an operation panel.

A front end presser member 10 located on the downstream side of the cycle sewing machine 4 and a rear end presser member 11 located on the upstream side of the cycle sewing machine 4 are provided on the work table 2. The front end presser member 10 is movably supported in the longitudinal direction of the work table 2 by a rail member (not shown) provided in the machine frame 1, and a rack 1 extends longitudinally in the machine frame 1.
It is fixed to the left end of 2. This rack 12 is supported so as to be movable in the longitudinal direction relative to the machine frame 1, and a pinion 14 of a pulse motor 13 fixed to the machine frame 1 is engaged with a part of the rack 12. And the pulse motor 13
The front end presser member 1 is integrated with the rack 12 as the
0 is driven back and forth in the longitudinal direction. The front end presser member 10 includes a front end clamp 15 that is rotated up and down by a clamp cylinder, and a lower clamp plate 16 that is movable on the work table 2. The front end of W can be held and released.

On the other hand, the rear end presser member 11 is provided with a rear end clamp 17 that is rotated up and down by a clamp cylinder, and a lower clamp plate 18 that is movable on the work table 2. The rear end portion of the work cloth W can be held and released by the clamp 17 and the lower clamp plate 18. Further, the rear end presser member 11 is connected to a rack 12 via a mounting plate extending toward the inside of the machine frame 1. As the rack 12 is moved by the rotation of the pulse motor 13, the rear end presser member 11 is moved together with the front end presser member 10, and each sewing location P on the workpiece cloth W is moved by the cycle sewing machine 4. The buttons are sequentially moved to the needle drop points and buttons are attached sequentially. On the upper surface of the downstream side of the work table 2, the front and rear end presser members 1 are installed.
0, 11 and the work cloth W transferred by the movement of the rack 12
An unloading device 19 is installed for unloading. This carry-out device 19 includes a carry-out motor 20, a drive pulley 21 driven by the drive pulley, a driven pulley 22, a carry-out belt 23 suspended between the driven pulley 22 and the drive pulley 21, and Push-up cylinder 2 that pushes up the carry-out belt 23 away from the work table surface 2
4, when the work cloth W is transferred by the front and rear end presser members 10 and 11, the carry-out motor 20 is stopped, the piston rod of the push-up cylinder 24 is protruded, and the carry-out belt is 23 is spaced apart from the upper surface of the work table 2. Further, when the transfer operation of the front and rear end presser members 10 and 11 is completed and the cycle sewing machine 4 finishes buttoning the final sewing location P of the workpiece cloth W, the button is pressed through the piston rod of the push-up cylinder 24. unloading belt 23
The lower part of the workpiece cloth W is lowered onto the workpiece cloth W, and in this state, the carry-out motor 20 is started, and the workpiece cloth W is carried out from the work table 2 to the outside as the carry-out belt 23 rotates.

On the other hand, a sewing machine holding cylinder 25 is fixed to the front surface of the arm 5 of the cycle sewing machine 4, and a presser 27 is attracted to the lower end of a piston rod 26 of the cylinder 25. Even when the piston rod 26 is retracted and the presser 27 is moved upwardly away from the workpiece cloth W, and both the workpiece presser members 10 and 11 reach their maximum feed positions, the workpiece is still long. If the button is still attached, the piston rod 26 of the presser cylinder 25 of the sewing machine part will protrude and the presser 27 will press the workpiece cloth W near the needle drop point.
is held on the upper surface of the work table 2. Also, the piston rod 2 of the sewing machine presser cylinder 25
6 is ejected, in synchronization with this, the carry-out belt 23 presses and holds the work cloth W against the upper surface of the table 2 via the piston rod of the push-up cylinder 24 of the carry-out device 19. Then, both the clamps 15 and 17 of both the presser members move upward, and the pulse motor 13 returns both the presser members 10 and 11 to their original positions, and the piston rod 2
6 and the unloading belt 23, and both clamps 1
After lowering the buttons 5 and 17, the sewing machine 4 attaches the buttons while sequentially moving them again to the button attaching position by the pulse motor 13.

[0007]

[Problems to be Solved by the Invention] However, in the conventional sewing device as described above, when the workpiece cloth W is a long cloth or a heavy cloth, it is difficult to sew the cloth again after the feed by the cloth presser members 10 and 11 is restored. When this process is continued, since there is no means to feed the front part A of the work cloth that was sent first, this part will sag or curl due to its own weight or frictional resistance against the work table 2, resulting in positional deviation or damage to the carry-out belt 23. There was a drawback that it could get caught. The present invention is designed to eliminate these drawbacks.

[0008]

[Means for Solving the Problems] The sewing device of the present invention includes a work table having a predetermined length, a cycle sewing machine installed on the top surface of the work table and capable of sewing buttons or overholes, and a sewing machine for sewing fabric to be processed. means for fixing onto a work table; a pair of cloth holding members capable of holding and releasing a work cloth installed on the upper surface of the work table on the upstream and downstream sides of the cycle sewing machine; and a cloth holding member on the downstream side. further downstream, an auxiliary presser member capable of holding and releasing the work cloth installed on the upper surface of the work table; and means for moving each of the presser members between an origin position and a predetermined feeding position; A means for urging each of the presser members to a work cloth holding state or a release state, a means for controlling the cloth presser member to repeat a cycle of holding, feeding, releasing and returning the work cloth, and a cycle after returning. , the auxiliary presser member holds and feeds the work cloth,
and an auxiliary clamp control means for releasing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be explained below with reference to the drawings. In the present invention, as shown in FIG.
An auxiliary presser member 28 is installed on the downstream side of the cycle sewing machine to slide and feed the workpiece cloth W onto the work table 2 in synchronization with the cloth presser members 10 and 11 while pressing the leading end of the workpiece cloth W fed by the presser member 11. It is provided further downstream from the presser member 10 located at.

As shown in FIG. 2, the auxiliary holding member 28 includes a support plate 29 fixed to the rack 12, a swing arm 30 whose one end is rotatably supported on the support plate 29, and a swing arm 30 that is rotatably supported on the support plate 29. A restraining spring 31 connected to the other end of the swing arm 30, an auxiliary clamp cylinder 32 for swinging the swing arm 30 against the spring 31, and a clamp arm 33 connected to the swing arm 30. , a connecting tool 34 attached to the tip of the clamp arm 33, an auxiliary clamp 35 attached to the connecting tool 34 so as to be able to move forward and backward and rotate freely, and a control means. A similar cycle of holding, feeding, releasing, and returning the work cloth is executed in synchronization with the operation, but the work cloth is not held in the first cycle.

Since the sewing device of the present invention has the above-described configuration, when the power is turned on in step S1 as shown in FIGS. , 28, are moved to the home position and the on operation of the clamp switch is confirmed in step S2, the clamp cylinder is turned on in step S3, and only the front end clamp 15 and the rear end clamp 17 touch the front and rear of the work cloth W. The auxiliary cloth pressing member 28 is held in the raised position. Next, the pulse motor 13 is driven in the reverse direction, and while holding the work cloth, the cloth presser member 10,
11 and 28 are sent downstream by a predetermined distance, and then the sewing data in the RAM 38 inputted by operating the button number setting switch 36 and button spacing setting switch 37 of the operation panel 9, or the sewing data stored in advance for standard type work cloth. ROM
39 sewing data are read out. Then, step S
When the ON operation of the start switch is confirmed at step 4,
Proceeding to the sewing routine of step S5, a button is sewn to the sewing location P of the work cloth W by the cooperation of the needle 6 and the button holding arm.

[0012] Movement distance of the holding member (650 m in the example)
If the length of the button arrangement on the work cloth is longer than in m), the cloth presser member is returned to its original state, and the front and rear cloth presser members hold the work cloth when the presser member is returned to its original position, and the button is returned when button attachment is possible. Step 6
determines this timing or determines the pre-programmed feed position, and if the result is YES, the clamp cylinder is turned off in step S7 and the workpiece cloth W is once released, and in step S8 the button knob is turned off. The sewing machine presser foot 43, which is a well-known presser member, is lowered to hold the work cloth W in the vicinity of the needle drop point, and the piston rod of the push-up cylinder 24 is retracted to release the work cloth at the front end by the carry-out belt 23. The front part A of W is held by the presser. Next, in step S9, each of the cloth presser members 10, 11, and 28 is returned to the original position with the work cloth W released, and then, in step S10, each clamp cylinder of the cloth presser member 10, 11, and 28 is turned on. The work cloth W is then held by the clamps 15, 17, and 35. In the following step S11, the sewing machine presser foot 43 and the push-up cylinder 2 are operated by the button knob foot.
4 and 4 operate in the opposite manner to the above and are released upward. After that, the process proceeds to step S12, and the cloth presser members 10, 11
, 28 are transferred by a predetermined distance, and buttons are attached to each sewing location P in step S5.

[0013] In this way, when all the buttons have been sewn onto the long work cloth W and the determination result in step S6 is YES, in step S13 the presser members 10, 11,
After the cloth presser 28 is released and the cloth is discharged by the carry-out belt, the cloth presser members 10, 11, 2 are removed in step S14.
8 is returned to the original position, and the process returns to step S2 to perform sewing on the next work cloth W. In FIG. 3, 40 is an input interface, 41 is an output interface, and 4
2 indicates a drive circuit.

The present invention is not limited to the configuration of the buttonhole indexer of the above embodiment, but can be applied to the configuration of a buttonhole indexer that continuously sews buttonhole stitches on a work cloth. It is also possible. Note that the auxiliary clamp 35 may be configured to move up and down together with the front and rear end clamps from the beginning.

[0015]

As described in detail above, according to the present invention, when feeding a long work cloth on the work table 2, the front portion A of the work cloth is held on the work table by the auxiliary clamp 35 of the auxiliary presser member 28. Since it is fed slidingly while being pressed against the conveyor belt 2, there is no sagging or bending in this part, and therefore there is a great advantage that there is no misalignment or getting caught on the conveyor.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a sewing device of the present invention.

FIG. 2 is a perspective view of an auxiliary pressing member in the present invention.

FIG. 3 is a block diagram showing an electrical circuit of a main part of the device of the present invention.

FIG. 4 is a flowchart of the apparatus of the present invention.

FIG. 5 is a perspective view of a conventional sewing device.

FIG. 6 is a front view of a part of a conventional sewing device.

[Explanation of symbols]

1 Machine frame 2 Work table 3 Machine table 4 Cycle sewing machine 5 Arm part 6 needle 7 Button supply device 8 Button hopper 9 Operation panel 10 Presser member 11 Presser member 12 Rack 13 Pulse motor 14 Pinion 15 Front end clamp 16 Lower clamp plate 17 Rear end clamp 18 Lower clamp plate 19 Unloading device 20 Unloading motor 21 Drive pulley 22 Driven pulley 23 Unloading belt 24 Push-up cylinder 25 Presser cylinder 26 Piston rod 27 Presser 28 Presser member 29 Support plate 30 Swing arm 31 Spring 32 Auxiliary clamp cylinder 33 Clamp arm 34 Connector 35 Auxiliary clamp 43 Sewing machine presser foot

Claims (1)

[Claims] Claim 1: A work table having a predetermined length;
A cycle sewing machine capable of button sewing or overhole stitching is installed on the top surface of the work table, a means for fixing the work cloth on the work table, and a cycle sewing machine is installed on the top surface of the work table on the upstream and downstream sides of the cycle sewing machine. a pair of cloth presser members that can hold and release the installed work cloth; and an auxiliary cloth presser that can hold and release the work cloth that is installed on the upper surface of the work table further downstream from the cloth presser member on the downstream side. a member, a means for moving each of the cloth presser members between an origin position and a predetermined feeding position, a means for biasing each of the cloth presser members to a work cloth holding state or a release state, The method comprises means for controlling the work cloth so as to repeat a cycle of holding, feeding, releasing, and returning, and an auxiliary clamp control means for causing the auxiliary presser member to hold, feed, and release the work cloth in the cycle after returning. Characteristic sewing equipment.