JPS6382256A - Conveyor - Google Patents

Abstract

PURPOSE:To aim at the promotion of efficiency of conveying operation, by making any adjusting work for altering the moving range and movable quantity of a holding device so as not to be required at a time when a size of a workpiece is changed, in case of a conveyor for the workpiece sewn with a sewing machine. CONSTITUTION:After holding the workpiece sewn at a sewing position by holding devices 14 and 18, this conveyor conveys it up to a storage position, repeating its operations for releasing the workpiece 7. In these holding devices 14 and 18, there is provided with a detector 22 for detecting an edge of the workpiece. And, while these holding devices 14 and 18 are moved toward the sewing position from the storage position, when a detecting signal is outputted from the detector 22, it is so designed that movements of these holding devices 14 and 18 are stopped and simultaneously the workpiece 7 is held by these holding devices 14 and 18. In addition, even if the size of the workpiece 7 is changed by the second detector 22 on the holding device 14, a movable quantity of the holding device 14 is automatically changed.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention provides an operation in which a workpiece processed at a processing position is gripped by a gripping device, and then transported to a storage position and released. This relates to a conveying device that repeatedly performs the following steps.

(Prior Art) Conventionally, this type of TA feeding device has a gripping device placed in a predetermined storage position while sewing a workpiece cloth by a sewing machine, and after the sewing process is completed, the gripping device is moved to the sewing position. There is a device in which the sewing machine is moved to a gripping position close to the gripping device, grips the work cloth with the gripping device, and then returned to the storage position, and releases the sewn work cloth at the storage position.

(Problems to be Solved by the Invention) However, in this conventional device, the movement range of the gripping device is set by two position detection switches whose arrangement positions can be changed along the movement path. Therefore, each time the size of the workpiece cloth to be sewn is changed, it becomes necessary to change the arrangement position of each position detection switch, which poses a problem that the work becomes troublesome.

This invention was made to solve the above problems, and its purpose is to change and set the movement range and movement amount of the gripping device when the size of the workpiece to be processed is changed. An object of the present invention is to provide a convenient conveyance device that does not require troublesome adjustment work.

Structure of the Invention (Means for Solving Problems) In order to achieve the above object, in this invention, a detector for detecting the end of the workpiece is provided on the gripping surface, and the gripping device When a detection signal is output from the detector while the workpiece is being moved from the storage position to the processing position, the movement of the gripping device is stopped and the workpiece is gripped by the gripping device. There is.

(Function) Therefore, while the gripping device is moved from the storage position to the processing position, the end of the workpiece is detected by the detector regardless of the size of the workpiece, and the end of the workpiece is detected based on the detection signal. The movement of the gripping device is stopped, and the workpiece is gripped by the gripping device.

(Example) Hereinafter, an example in which the present invention is embodied in a sewing machine will be described in detail with reference to the drawings.

Now, as shown in FIG. 1, the cycle sewing machine 1 is placed on a table 2. A needle bar 4 having a needle 3 at the lower end is supported by an arm portion 5 so as to be movable up and down, and forms stitches on the fabric 7 and the label 8 by cooperating with a well-known thread loop catcher provided in the bed portion 6. It is supposed to be done. The cloth 7 constitutes a workpiece. The fabric 7 and the label 8 are held by a well-known feeding device (not shown) equipped with a feeding table and a presser foot, and the feeding device is operated in synchronization with the vertical movement of the needle 3, thereby holding the fabric 7 and the label 8. label 8
is transported in the X and Y directions. Then, the needle 3. The label 8 is sewn onto the fabric 7 by the cooperation of the thread loop catcher and the feeding device (a).

The support rail 9 is placed on the table 2 on the left side of the cycle sewing machine 1, and has a drive pulley 11 rotated by a drive motor 10 supported at its left end, and a driven pulley 12 supported at its right end. Ryobu IJI
An endless chain 13 is hung between I and 12. The carrier 14 is slidably supported by the support rail 9, and its base end is fixed to the chain 13.

As the drive motor 10 rotates, each pulley 1
1, 12 and the chain 13, the crotch member 14 is reciprocated.

In order to set the maximum range of movement of the carrier 14, a pair of limit switches 15, 16 are mounted on the upper edges of both ends of the support rail 9, and each limit switch 15, 16 adjusts to a predetermined range based on engagement with the carrier 14. Outputs electrical signals. A light reflection type first photoelectric switch 17 is connected to both limit switches 15.1.
6, and when facing the base end of the carrier 14, outputs a carrier detection signal SG1 shown in FIG.

A light-reflecting second photoelectric switch 22 constituting a detector is attached to the U-shaped portion 14a at the front end of the carrier 14, and the carrier 14 is moved from the standby position shown in FIG. 1 toward the bed section 6. When the left end of the fabric 7 reaches a predetermined position between the U-shaped portions 14a as shown in FIG.
A cloth edge detection signal SG2 shown in the figure is output.

The cloth gripping cylinder 18 is attached to the U-shaped portion 14 of the conveyor 14.
A piston 20 is attached to a and has a pressing piece 19 at the tip.
extends into the U-shaped portion 14a.

The lower protruding piece of the U-shaped portion 14a constitutes a gripping piece 21, and the edge of the fabric 7 is gripped between the pressing piece 19, which is moved downward based on the operation of the cylinder 18, and the gripping piece 21. It is supposed to be done.

The one-film body 14 and cloth gripping cylinder 18 constitute a gripping device.

A pair of front and rear fabric supports 23 and 24 are arranged on the left side of the bed section 6, and their upper surfaces are continuous with the upper surface of the bed section 6. A guide groove 25 extending parallel to the support rail 9 is provided between the canvas supports 23 and 24, and as the conveyor 14 moves, the gripping piece 21 of the U-shaped portion 14a moves into the guide groove 25. It is meant to be moved along. At this time, the upper surface of the gripping piece 21 is located slightly below the upper surfaces of the pair of cloth support surfaces 23 and 24, so the end of the fabric 7 can be placed on the upper surface of the gripping piece 21. The rotary solenoid 26 is mounted on the left side of the arm 5, and has a presser bar 27 on its output shaft that extends above the canvas support 23.24 in order to press the fabric 7 toward the canvas support 23.24. It is installed.

A light-reflecting third photoelectric switch 28 is attached to the front fabric support 23.
When the fabric 7 is conveyed on the fabric support 23, 24 and the right edge of the fabric 7 leaves the third photoelectric switch 28 to the left, the fabric edge is detected as shown in FIG. Signal S
Output G3.

Next, the electrical configuration and operation of the sewing machine in this embodiment will be explained mainly with reference to FIGS. 3 and 4. cpu
<Central processing unit) 30 includes ROM (read only memory) 31 and RAM (random access memory) 32
The ROM 31 stores a program for controlling the operation of the entire sewing machine, and the RAM 32 stores sewing data necessary for sewing the label 8 onto the fabric 7. When the start switch 33 shown in FIG. 3 is operated, the CPU 30 first outputs a presser foot activation signal SG4 to the sewing machine 1 via the sewing machine drive circuit 34, and after a predetermined period of time has elapsed, outputs an Iii'jm start signal SG5. . Based on this presser foot operation signal SG4, the sewing machine l
A presser foot (not shown) is operated to clamp the fabric 7 and label 8 between it and a feed table (not shown). Also,
Based on the sewing start signal SG5, sewing data is read from the RAM 32, and based on the data, the needle 3 of the sewing machine 1 is moved up and down, and the feed device is activated to sew the label 8 onto the fabric 7. It will be done.

Further, at the same time as the sewing start signal SG5, the CPU 30
outputs a motor drive signal SG6 to the drive motor 10 via the motor drive circuit 35, and moves the carrier 14 to the right. Along with this rightward movement of the carrier 14, the carrier 14
When the base end of the rod faces the first photoelectric switch 17, the first photoelectric switch 17 outputs the ta feeding rod detection signal SG1 to the CPU 30, and based on the signal SGI, the CPU 30 outputs the motor drive signal SG6. Stop. Therefore,
The conveyor 14 is temporarily stopped at the standby position shown in FIG.

Next, when the sewing based on the sewing data for -cycles is finished and the label 8 is sewn onto the fabric 7, the CPU 30
outputs a sewing stop signal SG7, stops the vertical movement of the needle 3 and the operation of the feed device based on the signal SG7, and at the same time outputs a motor drive signal SG6,
resumes its rightward movement.

As the transport body 14 moves to the right, the left end of the fabric 7 enters between the pressing piece 19 and the gripping piece 21 of the fabric gripping cylinder 18, as shown in FIG. , the second photoelectric switch 22 outputs a cloth edge detection signal SG2 to the CPU 30. Then, the CPU 30 stops outputting the motor drive signal SG6 and at the same time outputs a cylinder operation signal SG8 to the cloth gripping cylinder 18 via the drive circuit 36. Accordingly, the piston 20 of the cloth gripping cylinder 18 is projected from the solid line position in FIG. 2 to the chain line position in the figure, and as a result, the pressing piece 19 and the gripping piece
The left end of the cloth 7 is held between the cloth 7 and the cloth 7.

When a predetermined period of time has elapsed in this state, the CPU 30 stops outputting the presser foot activation signal SG4, releases the sandwiched state of the fabric 7 and label 8 on the bed section 6, and at the same time turns the drive motor 10 on the conveyor 14. A motor drive signal SG6 for rotating in the opposite direction to that during rightward movement is output. As a result, the conveyor 14 moves to the first position while gripping the fabric 7.
It begins to be moved to the left of the diagram.

As this one-film body 14 moves to the left, its base end becomes the first
When facing the photoelectric switch 17, the first photoelectric switch 17
outputs the carrier detection signal SGI again. That signal SG
In response to I, the CPU 30 outputs a presser bar activation signal SG9 to the rotary solenoid 26 via the drive circuit 37. As a result, the rotary solenoid 26 is rotationally driven, and the presser bar 27 is rotated from the solid line position in FIG.
3.24) to provide a membrane resistance.

In this state, the conveyance operation of the fabric 7 continues, and when the right end of the fabric 7 separates from the presser bar 27 to the left and then faces the third photoelectric switch 28, the fabric edge detection signal SG3 output from the switch 28 is detected. In response, CPU 30 stops outputting cylinder actuation signal SG8. As a result, the piston 20 of the cylinder 18 is returned from the chain line position in FIG. 2 to the solid line position in the same figure, and the fabric 7 is released. Therefore, the fabric 7 with the label 8 sewn on it falls to the left of the fabric support 23.

When a predetermined time has elapsed since the output of the cylinder actuation signal SG8 was stopped, the CPU 30 stops the output of the motor drive signal SG6 and the presser bar actuation signal SG9, and 1i
The il feeder 14 is stopped near the left end of the support rail 11, and the presser foot 11127 is rotated back to the solid line position in FIG.

By repeating the above operations, the sewn fabrics 7 are stacked at a predetermined storage position.

In this embodiment, the left end of the fabric 7 is detected by the second photoelectric switch 22 on the carrier 14, so even if the size of the fabric 7 is changed, the amount of movement of the carrier 14 is automatically adjusted. Be changed. Therefore, unlike the conventional method, when installing the position detection switch, it is not necessary to perform the troublesome adjustment work of resetting the amount of movement of the carrier 14 by changing the position, etc., and the concealed transport work can be carried out efficiently.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but may stop the motor 10 in response to a detection signal from the limit switch 15, release the fabric 7 from the conveyor 14, and generate the presser bar activation signal SG9. Stop and presser bar 27
is returned to the solid line position in FIG.
It is also possible to avoid interfering with the movement of 4. Furthermore, the structure of each part may be arbitrarily changed without departing from the spirit of the invention, such as by making the conveyor 14 reciprocate via a toothed belt or by implementing it into various processing machines other than sewing machines. is also possible.

Effects of the Invention As detailed above, this invention eliminates the need to perform troublesome adjustment work to change and set the movement range and amount of movement of the gripping device when the size of the workpiece to be processed changes. This has the excellent effect of allowing short bar work to be carried out efficiently.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a sewing machine embodying this invention;
FIG. 3 is a partially enlarged front view of the first broadcast body, FIG. 3 is a program diagram showing the electrical configuration of the sewing machine, and FIG. 4 is a time chart. In the figure, 7 is a fabric as a workpiece, 14 is a conveyor, 18 is a cylinder for grasping the fabric (the above-mentioned 14° and 18 constitute a grasping device), and 22 is a second photoelectric switch as a detector. .

Claims (1)

[Claims] 1. A workpiece (7) that has been processed at a processing position is held by a gripping device (
14, 18), after which the workpiece (7) is gripped, the workpiece (7) is transported to a storage position, and the workpiece (7) is repeatedly released. A detector (22) is provided for detecting the gripping device (
14, 18) is moved from the storage position to the processing position, when the detection signal (SG2) is output from the detector (22), stopping the movement of the gripping device (14, 18), and A conveying device characterized in that the gripping device (14, 18) is configured to grip a workpiece (7).