JPS63130095A - Sewing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a sewing device that sews a work cloth by increasing a predetermined seam allowance from the edge of the cloth.

(Prior Art) Conventionally, for example, processing cloth such as shirt cuffs, which are clothing parts, are transferred one by one by a transfer means to a seam forming position corresponding to the seam forming means of a sewing machine main body, and the processed cloth is On the other hand, while keeping the specified seam allowance from the edge of the fabric,
In a sewing machine that performs I-sewing, the workpiece cloth is generally held at its center by the suction action of a transporting means, and then transported to a seam forming position.

(Problems to be Solved by the Invention) For this reason, in this conventional N-made device, it is necessary to change the amount of work cloth transferred by the transfer device according to the size of the work cloth. It is not possible to secure a predetermined seam allowance from the edge of the fabric and position it at the seam forming position on the sewing machine body, and the control circuit requires a special program to change the setting of the transfer amount of the transfer device. In addition to being complicated, it is necessary to change the setting of the transfer amount of the transfer device according to changes in the size of the workpiece cloth, which causes problems in that the operation is troublesome.

Structure of the Invention (Means for Solving the Problems) The present invention has been made by focusing on the above-mentioned problems. The sewing machine includes a transfer means for transferring the work cloth placed at a predetermined position to a seam forming position corresponding to the seam forming means of the sewing machine main body, and a transfer means for transferring the work cloth placed at a predetermined position to a seam forming position corresponding to the seam forming means of the sewing machine main body, and the work cloth transferred by the transfer means to form a seam. When the work cloth is detected by the covering work cloth detecting means and the work cloth detecting means, the conveyance of the work cloth by the conveying means is stopped, and the sewing by the seam forming means is stopped. and control means for controlling the start of the process.

(Function) Therefore, in the sewing device of the present invention, regardless of the size of the workpiece cloth, when the workpiece cloth is transported to the seam forming position by the workpiece cloth detection means, the transfer means stops transporting the workpiece cloth. At the same time, sewing by the seam forming means is started, and there is no need for a special program to change the amount of transport by the transport means depending on the size of the work cloth, and the control circuit configuration can be simplified. In addition, the workpiece cloth can be sewn accurately by securing a predetermined seam allowance from the edge of the cloth, although the operation can be simplified since there is no need to change the amount of conveyance.

(Embodiment) Hereinafter, an embodiment of a sewing device embodying the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, a pair of belt conveyors 1 are stretched over a machine base 3 via pulleys 2, and a belt conveyor 1 is connected by a motor 4 via toothed pulleys 5, 6 and a toothed belt 7. It is rotated in the direction of the arrow in Figure 1. Processed fabrics W such as garment parts such as cuffs for V-necks, which are stored in a storage container (not shown) in a stacked or unloaded state, are placed one by one on the upper left end of the belt conveyor 1.
It is conveyed to the right in FIG.

As shown in FIG. 1, four stop bins 8 are provided so as to correspond approximately to the center of the belt conveyor 1 and to be retractable into elongated holes 9 on the machine base 3, and to be adjustable in position in the conveyor running direction. . Each stop bin 8 is moved in and out by a drive means (not shown),
When it is projected, it engages with the side edge of the unsewn work cloth W being conveyed by the belt conveyor 1, and stops the work cloth W at the center of the belt conveyor 1, and when it is retracted, it engages with the side edge of the unsewn work cloth W being conveyed by the belt conveyor 1. The mounted work cloth W that has been sewn is allowed to be transported to the right.

As shown in FIGS. 1 to 3, the sewing machine body 12 has a bell 1.
- It is installed on the machine stand 3 at the rear of the central portion of the conveyor 1, and includes an arm portion 12a and a bed portion 12b. The needle bar 13 is provided on the arm portion 12a so as to be movable up and down, and a sewing needle 14 is attached to the lower end thereof. This sewing needle 14 and a well-known thread loop catcher provided in the bed portion 12b constitute a stitch forming means for forming stitches on the work cloth W.

As shown in FIGS. 1 and 2, a transfer device 15 constituting a transfer means is disposed on the machine base 3 so as to sandwich the belt conveyor 1 and be located near the opposite side of the sewing machine body 12. . This transfer device 15 includes a moving arm 17 supported movably in the direction of the sewing machine body 12 by a support bracket 16 on the machine base 3, and is reciprocated by the rotation of a motor 18 via a pinion, a rack, etc. (not shown). . A holding member 20 having a plurality of suction pads 19 on its lower surface is supported at the tip of the movable arm 17 so as to be movable up and down, and is raised and lowered by an air cylinder 21. When the presser member 20 is lowered to a position corresponding to the belt conveyor 1, the non-SiI processed cloth W stopped at the center of the belt conveyor 1 is suppressed and adsorbed by the suction pad 19, and the subsequent movement As the arm 17 protrudes and moves, the work cloth W is transferred from the belt conveyor 1 to a seam forming position corresponding to the seam forming means of the sewing machine main body 12.

As shown in FIGS. 2 and 3, a work cloth detector 22 serving as a work cloth detecting means is provided near the seam forming position of the sewing machine main body 12, and is arranged in parallel at the lower end of the arm portion 12a of the sewing machine main body 12. The light-emitting element 23 and the light-receiving element 24 are arranged in the same manner as shown in FIG. Then, the transfer device 15 transfers the unsewn work cloth W from the belt conveyor 1 to the sewing machine main body 12.
When the work cloth detector 22 is moved to the side and reaches the seam forming position and the reflector plate 25 is blocked, a detection signal is output from the work cloth detector 22.

As shown in FIGS. 2 to 4, the air cylinder 26 for the guide member is disposed on the bed portion 12b of the sewing machine body 12 in the vicinity of the sewing forming position, and the tip of the piston rod 27 extending forward thereof is A mounting member 28 is fixed. A guide member 29 constituting the workpiece cloth guide means is mounted on the mounting member 28 via a pair of support plates 30 made of handling springs so as to be arranged corresponding to the sewing forming position. Then, by the operation of the air cylinder 26, these two guide members engage one side edge of the workpiece cloth W that is transferred and placed at the seam forming position by the transfer device 15, and the workpiece cloth W is sewn into a seam. It is adapted to be moved between a set position where it is positioned at the forming position and a separated position where it is spaced apart from the set position.

The adjusting screw 31 is provided on the base end side of the piston rod 27 of the air cylinder 26, and by rotating and adjusting the adjusting screw 31, the operating stroke of the piston rod 27 is changed, and the guide member 29 for the workpiece cloth W is adjusted. The setting position of , that is, the seam allowance for one stage of seam formation can be set and changed. Further, the cover 32 is removably attached to the bed portion 12b, and the cover 32 protects the air cylinder 2.
6. The piston rod 27, mounting member 28, etc. are covered.

As shown in FIGS. 2 and 3, the presser bar 33 is provided on the arm portion 12a of the sewing machine body 12 so as to be movable up and down, and at its lower end, a substantially truncated conical presser roller 34 is rotated via a support 35. Possibly supported. When one cycle of sewing is completed, a known presser foot lifting mechanism is activated to raise the presser foot bar 33, allowing the workpiece cloth W to be removed from the seam forming position. Thereafter, when a new workpiece cloth W is inserted into the seam forming position, the workpiece cloth W is inserted into the guide member 2 as described above based on the workpiece cloth detection by the workpiece detector 22.
After the presser bar 33 is positioned at the seam forming position by
is lowered and the presser roller 34 comes into contact with the upper surface of the work cloth W, and when the sewing machine is operated thereafter, the work cloth W is transferred in the cloth feeding direction by the action of the feed dog 36 provided on the bed portion 12b. The contact rotation of the presser roller 34 applies a moving force to the work cloth W toward the guide member 29, so that the work cloth W is guided and transferred along the guide member 29.

As shown in FIGS. 1 and 2, the workpiece cloth rotating device 37 is disposed on the arm portion 12a of the sewing machine main body 12, and includes a support base 38 (not shown) that houses a
The support arm 39 is rotatably attached to the support arm 39, and the rotating member 40 is supported on the lower surface of the distal end of the support arm 39 via the air cylinder 51 thereof. When the work cloth W is transferred by the transfer device 15 between the belt conveyor 1 and the seam forming position of the sewing machine main body 12, the air cylinder 51 rotates the work cloth W as shown by the chain line in FIG. When the member 40 is moved to the raised position, the rotating member 40 is moved to the retracted position on the side of the arm portion 12a by rotation of the support arm 39 based on the drive of the motor, and the work cloth W is moved to the seam forming position. When sewing is performed while maintaining a predetermined seam allowance from the edge of the fabric, the rotating member 40 is moved by the motor to the arm portion 12a, as shown by the solid line in FIG.
The rotary member 40 is lowered by the air cylinder 51 to engage with the upper surface of the workpiece cloth W, thereby rotating the workpiece cloth W at a corner or the like.

Next, the control circuit of the sewing device constructed as described above will be explained with reference to FIG.

Now, the central processing unit (CPU) 41 constitutes a control means, and the CPU 41 has a read only memory (R
OM) 42 and random access memory (RAM) 43
is connected. The ROM 42 stores programs for controlling the entire operation of the N device, and the RAM 43
When the work cloth W is transferred to the seam forming position by the transfer device 15, distance data, etc. from the time when the work cloth W is detected by the work cloth detector 22 to the time when the transfer device 15 stops transferring the work cloth W is stored. remembered.

A work cloth detector 22 is connected to the CPU 41 via an input interface 44, and a detection signal from the work cloth detector 22 is input to the CPU 41. Also, CPU4
1 includes a work cloth transfer device 15, a work cloth rotation device 37, an air cylinder 26 for a guide member, and a sewing machine motor 45, an output interface 46, and drive circuits 47, 48, 49.
50, and a drive or stop signal is output from the CPU 41 to them.

In particular, when the CPU 41 receives a detection signal from the work cloth detector 22 when the transfer device 15 transfers the unsewn work cloth W to the seam forming position, the transfer device 1
5 to output a stop signal to place the work cloth W at a position substantially corresponding to the seam forming position, and then drive the guide member air cylinder 26 to move the guide member 29 from the separation position to the set position. This positions the work cloth W at the seam forming position, and further outputs a drive signal to the work cloth rotation device 37 and the sewing machine motor 45 to start making the N-type cloth W.

Next, the operation of the sewing device configured as described above will be explained.

Now, in this [J device, processed fabrics such as shirt cuffs W stored in a stacked state in a storage container (not shown)
are fed one by one onto the upper left end of the belt conveyor 1 shown in FIG. It is stopped by engagement with the stop bin 8. When the work cloth W is stopped in this way, the air cylinder 2 of the transfer device 15 is moved based on the detection by the work cloth detector (not shown).
1 and the motor 18 are activated, the presser member 20 is lowered and moved toward the sewing machine main body 12, and the machining aid 5
W is compressed and suctioned by one suction band of the presser member 20 and is transferred from the belt conveyor 1 to a seam forming position corresponding to the seam forming means of the sewing machine body 12. Thereafter, the stop bottle 8 is recessed below the elongated hole 9.

When the workpiece cloth W reaches the seam forming position by this transfer, a detection signal is output from the workpiece cloth detector 22 shown in FIGS. 2 and 3, and the presser member 20 of the transfer device 15 is is moved up and back, and the transfer of the work cloth W is stopped. Therefore, the work cloth W is placed at a position substantially corresponding to the seam forming position, regardless of its size.

Thereafter, the guide member air cylinder 26 is operated under the control of the CPU 41, and the guide member 29 is moved from the separated position shown by the chain line in FIG. They are engaged and positioned at the work cloth wh<stitch forming position.

Therefore, even if the edge of the workpiece cloth transferred and placed at the seam forming position by the transfer device 15 is oblique to the workpiece cloth feeding direction, it is corrected by engagement with the guide member 29 to a predetermined position. The seam is accurately positioned and placed at the seam forming position.

In this state, under the control of the CPU 41, the sewing machine motor 45
is activated and the operation of the sewing machine body 12 is started, and sewing such as decorative stitching is performed around the work cloth W while maintaining a predetermined seam allowance from the edge of the cloth. At this time, the work cloth W is accurately positioned at a predetermined seam forming position by engagement with the guide member 29 in advance, and the truncated conical presser roller 34
As the sewing machine contacts and rotates, it is moved toward the guide member 29 and is guided and transferred along the guide member 29 in the cloth feeding direction, so that accurate sewing can be performed while ensuring a predetermined seam allowance from the edge of the cloth. be able to.

When the preparation for one piece of work cloth W is completed in this way, the presser foot lifting mechanism raises the presser foot bar 33, and then the transfer device 15 operates to move the work cloth W in the sewing process to the seam of the sewing machine body 12. It is transferred from the forming position onto the bell 1 to the conveyor 1. And the processed cloth~■ is bell l-]n bear 1
Transferred to the specified position above $3! When the workpiece cloth W is processed H, the workpiece cloth W is conveyed to the right end portion by the belt conveyor 1, and at that position, the workpiece cloth W is transferred to the next processing step, etc. Thereafter, the stop pin 8 is moved in and out of the elongated hole 9 to position the next work cloth W to be transferred by the belt conveyor 1.

Effects of the Invention As detailed above, according to the present invention, regardless of the size of the workpiece cloth, when the workpiece cloth is transported to the seam forming position by the workpiece cloth detection means, the workpiece cloth is transferred by the transporting means. At the same time, the seam forming means starts manufacturing, and there is no need for a special program to change the transfer claw of the transfer means according to the size of the work cloth, and the control circuit structure can be easily configured. In addition, it is possible to simplify the operation by eliminating the need to change the transfer tffi. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view showing an embodiment of a sewing device embodying the present invention, FIG. 2 is an enlarged side sectional view of the main part thereof, and FIG. 3 is a partially cutaway side view showing an enlarged main part of the sewing machine. , 4th
The figure is a partial plan view of the bed portion of the sewing machine body, and FIG. 5 is a block diagram of the control circuit. 12... Sewing machine body, 14... Sewing needle constituting stitch forming means, 15... Transfer device as transfer means, 22
...Work cloth detector as work cloth detection means, 41...
-CPU that constitutes the control means.

Claims (1)

[Claims] 1. A sewing device that sews a work cloth (W) from the edge of the cloth while maintaining a predetermined seam allowance, comprising: a sewing machine main body (12) equipped with a seam forming means (14); and the sewing machine. A transport means disposed near the main body (12) for transporting the work cloth (W) placed at a predetermined position to a seam forming position corresponding to the seam forming means (14) of the sewing machine main body (12). (15) and a process that is provided near the seam forming position of the sewing machine body (12) and detects that the work cloth (W) transferred by the transporting means (15) has reached the seam forming position. a cloth detection means (22), and when the work cloth (W) is detected by the work cloth detection means (22), the work cloth (W) is transferred by the transfer means (15);
At the same time, the seam forming means (14) is stopped.
) control means (4) for controlling sewing to start by
1) A sewing device consisting of: