JPH048391A - Workpiece supplier for sewing device - Google Patents

Abstract

PURPOSE:To supply a cloth at a high speed to a sewing position and further to correct an error generated by a cylinder, by a servomotor so as to make the cloth high accurately suppliable by moving a cloth retaining plate through operational force of the cylinder and the servomotor, in the case of moving the cloth set at a preparation position. CONSTITUTION:After a body cloth W2 and a pocket cloth W1, set at a preparation position P1, are retained and held by a retaining plate 15, the retaining plate 15 is positioned in a sewing position P2 by sinking (placing in the first condition) a cylinder rod of a cylinder 12 while moving a moving table to be positioned at the first position T1 by actuating a servomotor 4. The retaining plate 15 at this time is moved at a high speed to move the cloth to the sewing position in a short time by synthesizing a moving speed by the servomotor 4 and a moving speed by the cylinder 12. A little operation error is generated in the cylinder 12, but in this error, the operation error of the cylinder 12 is left as detected previously by test operation or the like, and high accurate supply can be performed by correcting this error by the servomotor 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fabric supply device that automatically supplies a workpiece set at a preparation position on a workpiece mounting table to a sewing position in a sewing device. [Prior art and its problems 1 Generally, when attaching pocket cloth to body fabric, etc.
As shown in FIG. 7, the pocket cloth W1 is set in advance on the body material W2 at a cloth setting position PI spaced laterally from the sewing device M, and the set cloth W1 and the body material W2 are placed on the cloth presser plate I. It is designed to move to the sewing position while holding the sewing machine.

Then, at the sewing position P2, move the presser plate ■ in the X-Y direction and make the slit-shaped needle drop hole 1
A sewing needle N is dropped onto a to form a seam along the periphery of the pocket cloth W1.

After the sewing is completed, when the sewing products Wl and W2 are removed from the presser foot extractor, the presser foot plate (2) returns to the cloth setting position and prepares for the next setting operation.

By the way, methods using a servo motor or a cylinder are conventionally known for moving the presser plate (■) as described above, but each method has its advantages and disadvantages.
It could not be said that the system was satisfactory in terms of operating accuracy or operating speed.

In other words, when using a servo motor, it is possible to move the presser foot with high precision, but on the other hand, there is a problem that the operation speed is slow (causing delays on the production line, etc.), and the cylinder is The presser plate ■ can be moved at high speed, but cylinders are inherently prone to errors, and in this case, a fairly long stroke is required, so the cylinder rod Errors also occurred, and there was a problem that the presser plate could not be moved to an appropriate position.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a cloth feeding device for a sewing machine that can quickly and accurately feed a workpiece set at a preparation position to a sewing position. do.

[Means for Solving the Problems 1] The present invention includes a movable table that is held reciprocatingly along a linear movement path parallel to the workpiece conveyance path, and a movable table that is movable in a first direction in the linear movement path. a motor that moves the cylinder rod between the position and a second position that is spaced backward in the workpiece conveyance direction;
A cylinder that moves linearly between a state and a second state, and a work holder that can hold and release a work on a work mounting table and that reciprocates along a conveyance path of the work by movement of a cylinder rod. , when the movable base is in the first position and the cylinder rod is in the first state, the holding body is in the sewing position, and when the movable base is in the second position and the cylinder is in the second position, the workpiece is held. The workpiece held by the workpiece holder is moved from the preparation position to the sewing position by controlling the cylinder and motor by a control means.

The control means may cause the cylinder rod to be in the second state and set the workpiece holder between the preparation position and the sewing position if the workpiece setting operation at the first position is not completed at the end of the sewing operation. The workpiece holder may be positioned at the standby value 1, and upon completion of the setting operation, the moving table may be moved to the second position, and the workpiece holder may be positioned at the preparation position.

[Function] In the fabric supply device having the above configuration, when moving the fabric between the preparation position and the sewing position, the motor and cylinder operate, so the fabric moves along with the moving body at the combined speed of the motor and cylinder. Move fast. Also, at this time, some operating errors occur in the cylinder, but this can be easily corrected by detecting the operating errors of the cylinder in advance and correcting the detected errors using a servo motor. .

Furthermore, if the cloth setting operation at the preparation position is not completed at the end of the sewing operation, the holding body is moved to the standby position by the action of the cylinder, and when the setting operation is completed, the servo motor is activated. If the holding body is moved to the preparation position, the feeding operation can be performed more efficiently.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to FIGS. 1 to 6.

In the figure, reference numeral 1 denotes a base, and a pair of rails la, la are provided on the upper surface of both sides of the base along the cylinder direction. Reference numeral 2 denotes an X-moving table movable in the X direction (XI, X2) along the rail, and an endless belt 3 supported along the X direction by the base 1 is attached to the lower surface of the table.

Reference numeral 4 denotes a servo motor for moving the endless belt 3 in the X direction, and by driving this servo motor 4, the X moving table 2 is moved in the Xl and x2 directions via the endless belt 3.

Further, reference numeral 5 denotes a Y-movement table movable along a pair of rails 5a, 5a provided on the movable table 2 along the Y direction. Reference numeral 6 denotes an endless belt supported along the Y direction by the moving table 2, and is moved by a Y motor 7. The movement of this belt causes the moving table to move along the rail 2.
a, 2a.

On the upper surface of this moving table 2, a presser plate moving i1m$8 as shown in the second section is provided.

In FIG. 2, reference numeral 9 denotes a holding stand fixed to the upper surface of the moving table, and this holding stand 9 is provided with a pair of guide rods 10 and 10 extending along the X direction. Reference numeral 11 denotes a slide member fitted to the guide rods 10, 10, and the guide rods 10, 10 are moved by the operation of the cylinder 12.
It is designed to move in the X direction along. Reference numeral 13 denotes an arm whose one end is vertically movably supported on the slide member 11 by a shaft 14, and a presser plate 15 having a slit-shaped needle hole 15a is attached to the other end. 15 is adapted to press and hold the workpiece placed on the mounting table as shown in FIG. 3 by subjecting the arm body 13 to TB$ processing.

In addition, in FIG. 3, Pl is the preparation position for the worker to set the workpiece, P2 is the sewing position, and P3 is the standby position P3 set between the preparation position P1 and the sewing position P2. , respectively.

Further, 16 is the preparation position P1 on the workpiece mounting table.
This is a work setting device for setting works (here, body cloth W2 and pocket cloth Wl).

In this work setting device 16, by operating a cylinder 18 held on a mounting base 17, a pocket-shaped template 19 attached to a cylinder rod 18a moves in and out of the body material Wl along a guide rod 21. The operator sets the pocket cloth W1 by folding the pocket cloth W1 along the template 19 protruding from the body material W2.

FIG. 4 is a block diagram showing the control system circuit in this embodiment.

In the figure, 22 is a CPLI as a control means, 23 is a RAM that stores sewing patterns, etc., 24 is a ROM that stores operation programs, etc.
22 is the servo motor 4.7 and the cylinder 12.18.
is controlled according to the procedure shown in the flowchart of FIG. 5 to control the cloth supply operation. Note that 25 is an input operation section for inputting predetermined commands and data to the CPLI 22.

Next, the work supplying operation of this embodiment having the above configuration will be explained based on the flowchart of FIG.

The operator sets the body cloth W2 on the workpiece mounting table and operates the cylinder 18 to move the template 19 to the preparation position P1.
Then, the pocket cloth W1 is set on the template 19. Boke Nodo ywi is set by bending the peripheral edge of the cassette 19. At this time, the presser plate 15 is located at the standby position P3 or the sewing position P2 depending on the determination result described later, and when the bending operation is completed, the servo motor 4 is activated or the servo motor 4 and the cylinder 12 are activated simultaneously. Due to the operation, the X moving table 2 moves to the second position T2 as shown in the sixth section (b), and the cylinder rod 1
2a enters the second state, the press plate 15 moves to the preparation position PI, and presses and holds the body cloth W2 and the pocket cloth W1 set at the preparation position P1 (step 1). Thereafter, the sabot motor 4 is activated, and the moving table 2 is moved in the X2 direction to the first position TI, and the cylinder rod 12a of the cylinder 12 is retracted (into the first state) and the presser plate 15 is moved to the first position TI. moves in the X2 direction, and the presser plate 15 moves in the direction of
) as shown in the sewing position P1 [Step 2]
. At this time, the presser plate 15 moves at high speed by combining the moving speed of the servo motor 4 and the moving speed of the cylinder 12, so that the cloth can be moved to the sewing position in a short time. In addition, some operational errors occur in the cylinder 12, but this can be avoided by testing the cylinder 12 in advance.
The operating error of the servo motor 4 is detected and the error is
Highly accurate supply can be achieved by correcting the

Then, based on the sewing data stored in the RAM 23,
The servo motor 4 and the Y servo motor 7 are operated, and the movement of the X moving table 2 and the Y moving table 5 moves the presser plate 15 together with the holding table 9 in the X and Y directions, and the needle drop hole 15 of the presser plate 15 is moved.
The needle N falls into the needle a to form a predetermined sewing pattern (step 3).

During this sewing operation, the operator operates the cylinder 12,
At the preparation position P1, setting work for the next workpiece to be sewn is started. Then, when the sewing operation is completed, C
The PU 22 determines whether the next setting operation by the operator has been completed or not (step 4). If the sewing operation has been completed, the PU 22 simultaneously operates the cylinder 12 and the X servo motor 4 to perform the operation shown in FIG. Attach the presser plate 15 as shown in ! lI!
At step 5), the set cloths Wl and W2 are held in the ready position P1.

Further, if it is determined in step 4 that the cloth setting operation has not been completed, the X servo motor 4 is not activated, only the cylinder 12 is activated, and the cylinder rod 12a is activated.
is made to protrude (set to the second state). Thereby, the presser plate 15 is located at the standby position P3 as shown in FIG. 6(b) (step 6). When the setting operation by the operator is completed, the X servo motor 4 is activated and the moving table 2 is moved to the second position T2 (step 78). As a result, the cloth holding table 15 moves to the 4 m position P1 and holds the set cloths Wl and W2.

In this embodiment, after the sewing operation is completed, if the next work setting operation by the worker is not completed, the presser plate 15 is made to wait at the standby position P3, and the presser plate 15 is made to wait at the standby position P3, Although the presser plate 15 is moved efficiently, it is also possible to hold the presser plate 15 at the sewing position P2 until the setting operation is completely completed. However, in this case, the working efficiency is slightly lower than in the above embodiment.

In addition, in the above explanation, the case where the pocket cloth W2 layered on the body cloth Wl is fed to the position P2 made of l]x was given as an example, but the present invention can also be applied to the feeding of other workpieces. However, the present invention is not particularly limited to the above embodiments.

[Effect of the invention 1 As explained above, according to the cloth feeding device according to the present invention,? 1! When moving the fabric set at the preparation position, the fabric presser plate is moved by the actuation force of the cylinder and servo motor, so the fabric can be fed to the sewing position at high speed. Since the error caused by the cylinder can be corrected by the servo motor, the cloth can be fed with high precision.

In addition, if the worker has not finished the next cloth setting operation at the end of the sewing operation, the movable table is moved to the standby position by the action of the cylinder, and when the setting operation is completed, the presser foot By using a servo motor to move the servo motor, the time until the setting operation is completed can be used effectively, and the setting operation can be performed more efficiently.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a part of an embodiment according to the present invention;
The second section is a perspective view showing the presser plate moving mechanism attached to the one shown in FIG. 1, FIG. 3 is a perspective view showing the cloth mounting table and cloth setting mechanism of the same embodiment, and the fourth section is a perspective view of the same embodiment. FIG. 5 is a block diagram showing the control system circuit in the same embodiment, and FIG. 6(a) is a flowchart showing the cloth setting operation in the same embodiment.
. (b) and (c) are explanatory side views showing the operating state of the same embodiment, and Fig. 7 is an explanatory perspective view showing the conventional setting operation of the pocket cloth and the body cloth. W2......In body drawing 2......X moving table 4...X motor 12... ...Cylinder 12a...Cylinder rod 15...Press plate (work holding plate) 22...
......CPU (control means) Pl...
...Preparation position P2...Sewing position P3...Standby position TI...First position T2...・Second position M...Sewing device Wl...Pocket cloth

Claims (2)

[Claims] (1) A work supply device for a sewing device that linearly moves a workpiece set at a preparation position a predetermined distance away from the sewing position on a workpiece mounting table to supply the workpiece. a moving table capable of reciprocating along a linear movement path parallel to the conveyance path of the workpiece; and a first position on the sewing position side of the linear movement path.
a servo motor that moves the cylinder rod between the position and a second position that is spaced backward in the work transport direction; a cylinder that is fixed to the moving table and moves the cylinder rod between the first state and the second state; a workpiece holder capable of holding and releasing cloth on a placing table and reciprocating along the workpiece conveyance path by movement of a cylinder rod; the moving table is in a first position and the cylinder rod is in a first position; relative to the holder so that when the workpiece holder is in the first state, the workpiece holder is in the sewing position, and when the movable table is in the second state and the cylinder is in the second position, the workpiece cloth holder is in the preparation position. A movable table and a cylinder are arranged in relation to each other, and a control means is provided for controlling the cylinder and the servo motor, the control means positions the movable table at a first position and puts the cylinder rod in a first state during a sewing operation;
A work conveyance device for a sewing machine, characterized in that a moving table is positioned at a second position and a cylinder rod is placed in a second state when setting cloth. (2) The workpiece is set at a preparation position that is a predetermined distance away from the sewing operation position of the sewing device.
A workpiece supply device for a sewing machine that is configured to linearly move and feed a workpiece on a workpiece mounting table, the workpiece supplying device comprising: a moving table held so as to be reciprocally movable along a linear movement path parallel to a conveyance path of the workpiece; , the moving table is moved between a first position on the linear movement path and a second position spaced backward in the workpiece conveyance direction, and is moved between the first position, the second position, and between these two positions. 3rd set
a motor that can be stopped at a certain position; a cylinder that is fixed to the moving table and that linearly moves a cylinder rod between a first state and a second state; a cylinder that can hold and release cloth on the workpiece support; a workpiece holder that reciprocates along the workpiece transport path by movement of the workpiece holder, and when the moving table is in a first position and the cylinder rod is in a first state, the workpiece holder is in a sewing position. When the movable base is in the second position and the cylinder is in the second state, the work holder is in the ready position, and when the movable base is in the second position and the cylinder is in the second state, the work holder is in the ready position. A movable base and a cylinder are arranged in relation to the holding body so as to be located at the sewing position, and a control means for controlling the cylinder and the motor is provided, and the control means moves the movable base to the first position during the sewing operation. position and bring the cylinder rod into a first state, and when setting the work, position the movable body at a second position and bring the cylinder rod into a second state;
Furthermore, if the work setting operation at the preparation position is not completed at the end of the sewing operation, the moving table is set to the first state and the cylinder rod is set to the second state, and when the work setting operation is completed, the moving table is moved to the second position. A work supply device for a sewing device that is moved.