JPH03133480A - Sewing machine - Google Patents

Abstract

PURPOSE:To shorten cycle time from the preparation of a sewing piece to sewing by starting a sewing piece holding operation with a sewing piece supplying device while performing a sewing operation, and moving the sewing piece supplying device from a standby position to a supply position after returning to the non-operating position of a presser plate according to the completion of the sewing operation. CONSTITUTION:The upper and lower templates and the front and rear templates of the sewing piece supplying device S and air cylinders 17, 26, and 24 for presser spring are connected to a microcomputer 51 via control valve devices 54, 55, and 56, respectively, and furthermore, the upper and lower bending pieces of a bending device B and air cylinders 32 and 40 for bending piece opening/closing are connected to the same via control valves 57, 58, respectively. The microcomputer 51 controls a seam forming device N, a traveling device F, the sewing piece supplying device S, and the bending device B based on input signals from first input devices 52, 53 in sequence decided in advance. Meanwhile, the sewing piece holding operation of a sewing piece W2 placed newly on a template 19 by the sewing piece supplying device S is started, and the sewing piece supplying device S is moved from the standby position to the supply position after the presser plate 7 is returned to the non-operating position according to the completion of the sewing operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to sewing in which sewing pieces are folded in accordance with a predetermined order, and the sewing pieces are fed to a sewing machine for sewing. Regarding machines.

[Prior Art] Some conventional sewing machines are designed to sew a sewing piece onto a workpiece cloth by continuously and automatically performing the following plural operations based on the operation of a foot pedal. (a) The operation of holding the sewing piece on the template of the folding and feeding device.

(b) Move the held sewing piece below the presser plate of the sewing machine, sandwich the sewing piece between the template plate and the presser plate, and remove one of the sewing pieces that protrudes laterally from both plates. The action of bending a part.

(C) Operation of setting the folded sewing piece onto the workpiece cloth.

(d) Sewing operation of the sewing piece.

[Problem to be solved by the invention] However, in the above device, in order to start each operation,
It is necessary to operate the foot pedal multiple times, which is not only cumbersome, but also because the operation of the entire bending and feeding device is stopped while the sewing piece is being sewn. However, there is a problem in that it is not possible to perform the sewing piece preparation operation, for example, the operation described in item (a) above, and the cycle time required from preparing the sewing piece to sewing it becomes longer.

This invention has been made to solve the above problem, and its purpose is to start preparing the next sewing piece to be sewn during the sewing operation of the sewing piece. To provide a sewing machine that can shorten the cycle time required from preparation to sewing, and also reduce the number of operations of an input device such as an operating pedal, thereby reducing the burden on a worker. be.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a stitch forming device including a needle that is moved up and down, and a stitch forming device that is arranged on a bed surface,
Between an active position where a feed plate on which a work cloth can be placed and a sewing piece supplied onto the work cloth are pressed toward the feed plate and the bed surface, and a non-active position where the work position is spaced upward from the work position. A sewing machine including a presser plate that is moved by a presser plate and a feed device that is moved relative to the needle, a template on which a sewing piece to be fed to the feed device is placed, and a sewing machine that sews on the template. A sewing piece supply device that includes a holding piece that presses and holds the attached piece, and that is switched and moved between a supply position where it enters between the feed plate and the presser plate and a standby position where it is separated laterally from the supply position. a bending device that includes a bending piece for bending a sewing piece inserted between the feed plate and the presser plate so as to surround the template; the seam forming device; Device,
a first input device for inputting signals for operating the sewing strip supply device and the bending device; and controlling the operation of each of the devices in a predetermined order based on the input signals from the first input device. Accordingly, the first control device automatically performs a series of operations consisting of feeding, folding and sewing the sewing piece, the second input device inputs a predetermined signal during the sewing operation of the sewing machine, and the second input device. In response to the input signal from the second input device, the sewing piece supplying device starts the sewing piece holding operation during the sewing operation, and after the presser plate returns to the inactive position with the end of the sewing operation, and a second control device for moving the sewing strip supply device from the standby position to the supply position.

[Operation] Based on the input signal from the first input device, the first control device
The stitch forming device, the feeding device, the sewing piece supply device, and the folding device are controlled according to a predetermined order.

That is, when a sewing piece is placed on the template of the sewing piece supply device placed at the standby position, the sewing piece is pressed and held on the template by the holding piece, and then both are moved to the supply position. and enters between the feed plate and presser plate of the feed device. Subsequently, the presser plate is moved from the inactive position to the active position, and the sewing piece is pressed onto the template by the presser plate.

Next, the sewing piece is bent so as to surround the template by the bending piece of the bending device, and after separating the template from the sewing piece, the pressing plate, the sewing piece, and the bending piece are folded to the feed plate. It is lowered integrally onto the fabric to be processed above. After the holding piece is returned to the standby position, the sewing machine is operated and the sewing piece is sewn onto the workpiece cloth. When this sewing operation is completed, the presser plate is moved upward to a non-working position.

On the other hand, when a predetermined signal is input from the second input device to the second control device during the sewing operation of the sewing machine, the second control device responds to the signal to control the sewing piece newly placed on the template. On the other hand, the sewing piece supplying device starts the sewing piece holding operation, and after the presser plate returns to the inactive position with the end of the sewing operation, the sewing piece supplying device is moved from the standby position to the supplying position.

[Example] Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings. As shown in FIGS. 2 to 4, the arm 1 of the sewing machine includes a stitch forming device N that includes a needle 2 that is moved up and down.
A feeding device F is provided on the bed portion 4 for moving the work cloth Wl such as body cloth relative to the needle 2.
is provided. This feeding device F is provided with a feeding plate 6 for placing the work cloth W1 and sewing pieces W2 such as labels and names on the upper surface of the bed portion 4, and the feeding plate 6
A presser plate 7 is provided which can be switched between an active position for pressing the canvases W1 and W2 against the upper surface of the bed portion 4 and a non-active position for moving upwardly away from the active position. Furthermore, the feeding device F is provided with an outer presser foot 7a that is movable up and down in the same way as the presser plate 7 in order to press the work cloth W1 against the feeder plate 6 in the vicinity of the presser plate 7.

On the upper surface of the arm portion 1 is a support stand 8 for the sewing piece supply device S.
is attached, and a mounting plate 10 is attached to the support shaft 9 of the support stand 8.
is rotatably mounted via the support arm 11, and as the mounting plate 10 and the support arm 11 are rotated, the mounting plate 10 and the support arm 11 move to the operating position shown by the solid line in FIG. It can be switched to the usage position. A support frame 12 is attached at its base end to the support arm side end of the mounting plate 10, and a pair of guide shafts 13 extending in the same direction as the support arm 11 are installed within the support frame 12. A movable body 14 is supported on both guide shafts 13 so as to be able to reciprocate.

A pair of operating shafts 15 orthogonal to both guide shafts 13 are mounted on the movable body 14 so as to be integrally movable via a connecting body 16.
A piston 18 of a template upper/lower air cylinder 17 mounted on the connecting body 16 is connected to the movable body 14. A template 19 on which the sewing piece W2 is placed is attached to the end of the moving shaft 15 via a connecting body 20. A rotating body 21 is rotatably supported on the connecting body 20 around a support shaft 22, and a presser spring 23 extending upwardly from the template 19 is attached to the rotating body 21. Based on the rotation of 21, the presser spring 23 is switched between an active position where the sewing piece W2 is pressed and held on the template 19 and a non-active position where it is separated upward from the active position. Further, on the connecting body 20, there is a presser spring air cylinder 24 for switching the arrangement position of the presser spring 23 via the rotating body 21.
is attached, and its piston 25 is connected to the rotating body 21.

Further, as shown in FIG. 5, an air cylinder 26 for front and rear mold plates is attached to the mounting plate 10, and its piston 27 is connected to the movable body 14. Then, with the mounting plate 10 of the sewing piece supply device S placed in the use position shown by the solid line in FIG. The template 19 is reciprocated in the vertical direction between the first position (standby position) shown by the solid line in FIG. 6 and the second position shown by the two-dot chain line in FIG. will be moved. Furthermore, as the piston 27 of the air cylinder 26 moves in and out, the movable body 141 operating shaft 15 and the upper and lower connecting bodies 1
6.20, the template 19 is reciprocated in the front and back direction between the second position shown by the two-dot chain line in FIG. 6 and the third position (supply position) shown in FIG.

As shown in FIGS. 2 and 4, an operating body 31 of the bending device B is supported at the base end of the support base 8 so as to be movable along the mounting plate 10, and a An air cylinder 32 is attached, and its piston 33 is connected to the actuating body 31.
is connected to.

A pair of swinging arms 34 are swingably supported at the base ends of the operating body 31, and a bending piece 35 for bending the sewing piece W2 is positioned at the tip of each swinging arm 34. Adjustably mounted. Further, a cam groove 36 is formed on the inner edge of the central portion of each swing arm 34, and a pair of rollers 37 that engage with each cam groove 36 are attached to the mounting plate 10 via support pieces 38. has been done.

An air cylinder 40 having a pair of pistons 39 is suspended from and fixed to the actuating body 31, and each swing arm 34 has an engaging piece 41 protrudingly provided to engage with each piston 39. A spring 42 is tensioned between each engagement piece 41 and urges each swing arm 34 in a direction toward each other. and,
As shown in FIG. 4, when each air cylinder 32, 40 is inactive and each piston 33, 39 is placed in the retracted position, each swinging arm 34 is placed in an upper position via the actuating body 31. cam groove 3 based on the biasing force of the spring 42.
The shallow grooves 6 are engaged with each roller 37, each engagement piece 41 is engaged with a piston 39, and each bent piece 35 is held in an open state.

As shown in FIG. 1, the sewing machine of this embodiment includes a microcomputer (hereinafter referred to as microcomputer) 51 that constitutes a first and second control device, and the microcomputer 51 has first and second inputs. Predetermined signals are input based on the depression operations of the presser foot lifter pedal 52 and the starting pedal 53, which constitute the apparatus. The presser foot lifting pedal 52 outputs predetermined signals in response to two steps of depression operation. The microcomputer 51 is connected to each of the above-mentioned devices, that is, the stitch forming device N,
It is equipped with a plurality of programs for controlling the feeding device F, the sewing piece supplying device S, and the folding device B according to a predetermined order.

The microcomputer 51 also includes air cylinders 17 and 26 for upper and lower templates, front and rear of the template, and presser springs of the sewing piece supply device S.
．． 24 are connected via control valve devices 54, 55 and 56, respectively. Furthermore, the microcomputer 51 includes a bending device B.
Air cylinder 32 for folding pieces up and down and for opening and opening the folded pieces
．． 40 are respectively connected via control valve arrangements 57,53. Each of the control valve devices 54 to 53 includes a solenoid valve that controls the supply of air to the corresponding air cylinder 17, 26, 24, 32.40, and the microcomputer 51 changes all the solenoid valves from a ready state to a deactivated state. It includes a dip switch and a program selection switch for changing the state.

Then, each of the solenoid valves is switched to an operation ready state by the dip switch, and a predetermined program is selected in advance by the program selection switch, and by operating each pedal 52, 53, the microcomputer 5
1 controls the operation of each of the devices N, F, S, H according to the program and input signals from each pedal 52, 53.

After the operator turns on the power to the sewing machine and selects a predetermined sewing program, when the start pedal 53 is depressed, the microcomputer 51 activates the feed device F and moves the presser plate 7 to the bed. 4. Move it along the top surface and place it at the predetermined position shown in FIG. Thereafter, the microcomputer 51 sequentially performs the following operations in response to the operations of the respective pedals 52 and 53. That is, (A) When the presser foot lifting pedal 52 is depressed to the first step, the presser foot plate 7 and the outer presser foot 7a are raised to the inactive position.

(B) When the start pedal 53 is depressed, the control valve device 5
6, the presser spring air cylinder 24 is operated, and the presser spring 23 is moved from the solid line position in FIG. 6 to the two-dot chain line position. While the activation pedal 53 continues to be depressed, the presser spring 23 is held at the position shown by the two-dot chain line. At this time,
The operator can place the sewing piece W2 on the template 19.

(C) After the sewing piece W2 is placed, start pedal 53
When the pressing is released, the presser spring 23 returns to the position shown in solid line in FIG. 6, whereby the sewing piece W2 is pressed and held on the template 19.

(D) 71 When the presser foot lifting pedal 52 is depressed to the first step again, the air cylinder 17 for raising and lowering the template is operated via the control valve device 54, and the template 19 is moved from the first position to the second position in FIG. lowered into position.

(D)-2 Next, the template front and rear air cylinders 26 are operated via the control valve device 55, whereby the template 19 moves from the second position in FIG. 6 with the sewing piece W2 placed thereon. It is moved backward to the third position shown in FIG. 2, and the sewing piece W2 and template 19 are placed below the presser plate 7.

(D)-3 Subsequently, the presser plate 7 is lowered onto the template 19, and the sewing piece W2 is held between the plates 7 and 19.

(D)-4 Next, the air cylinder 32 for raising and lowering the bending piece is operated via the control valve device 57, and the air cylinder 32
The piston 33 is projected by about 1/2 of the operating stroke, and both swing arms 34 are lowered through engagement between the rollers 37 and the shallow grooves of the cam grooves 36, and both bent pieces 35 are moved as shown in FIG. (a
) is moved downward from the position shown. As a result, both sides of the sewing piece W2 are bent downward. Then, with the deep groove portion of the cam groove 36 facing the roller 37, the air cylinder 40 for opening and opening the bent piece is operated via the control valve device 53, and the double bent piece 35 is moved below the template 19. It is moved in the closing direction. Thereby, the sewing piece W2 is bent so as to surround the template 19, as shown in FIG. 7(b).

(D)-5 Subsequently, the air cylinders 26 and 17 for the front and rear of the mold plate and the upper and lower air cylinders are operated in sequence, and the mold plate 19 is moved to the second position in FIG.
7(b) and 7(c), the template 19 is pulled out from the sewing piece W2. At this time, the sewing piece W2 is sewn between the presser plate 7 and each bent piece 35 by the spring force that urges the presser plate 7 downward.
is pinched.

(E) Next, when the presser foot lifting pedal 52 is depressed to the first step, the presser foot 7a shown in FIG. It is pressed against the plate 6.

(F) Subsequently, when the presser foot lifting pedal 52 is depressed to the second step, the piston 33 of the bending piece up/down air cylinder 32 is extended over its entire operating stroke, and at the same time, the presser plate 7 of the feeding device F is be lowered. Thereby, each bent piece 35. Presser plate 7 and sewing piece W
2 are lowered together onto the work cloth Wl, and the work cloth W2
Pressed by

(G)-1 Next, when the starting pedal 53 is depressed, the air cylinders 40.32 for opening and lowering the bent pieces are sequentially operated, and both bent pieces 35 return to the position shown in FIG. 4. .

(G)-2 Thereafter, the stitch forming device N and feed device F of the sewing machine are operated to perform sewing, and the sewing piece W2 is sewn onto the work cloth W1.

(G)-3 After the sewing is completed, the presser plate 7 and the outer presser foot 7a of the feeding device F are raised and returned to their original positions, and the -sewing cycle is completed.

On the other hand, in this embodiment, when the operator has become proficient in using the sewing machine, the new sewing piece W2 to be sewn next is
The sewing machine (() can be supplied during the sewing operation described in Section 2. In other words, when the starting pedal 53 is operated during the sewing operation, the microcomputer 51 operates the presser spring air cylinder 24. The pressing and holding operations described in sections (B) and (C) can be performed.

If the sewing operation continues even after the new sewing piece W2 is pressed and held, the microcomputer 51 causes the template 19 to stand by at the first position shown in FIG. 6. At the same time as the sewing operation is completed, the microcomputer 51 raises the presser plate 7, and then automatically performs the operations described in (D)-1 to (D)-5 above.

Therefore, in this case, it is possible to shorten the cycle time required from preparing the sewing piece to sewing it, thereby increasing production efficiency, and reducing the number of pedal operations, thereby reducing the burden on the operator.

In addition, in this embodiment, when it is not necessary to accurately position the work cloth Wl on the feed plate 6, the operations from item (E) onwards are automatically performed based on the program selection switch or the switching operation of the deep switch and the switch. It is also possible to set a program to be executed automatically, and to start its operation by depressing the starting pedal 53 after the operation in item (D)-5.

[Effects of the Invention] As described in detail above, the present invention starts the preparation of the next sewing piece to be sewn during the sewing operation of the sewing piece, so that the entire process from preparation of the sewing piece to sewing is completed. This has an excellent effect in that the time required for the process can be shortened, and the number of operations of an input device such as an operating pedal can be reduced, thereby reducing the burden on the operator.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a control device of a sewing machine embodying the present invention, Fig. 2 is a partially cutaway side view of the sewing machine, and Fig. 3 is a front view showing a sewing piece supply device. , FIG. 4 is a front view showing the folding device, FIG. 5 is a partially cutaway plan view of the sewing machine, FIG. 6 is a partial side view showing the operating state, and FIGS. 7(a) to ( c) is a partial front view showing the operating state of the folding device. 2...needle, 6...feeding plate, 7...pressing plate, 19...template plate, 23...pressing spring as holding piece, 35...bending piece, 51...first, second control device microcontroller as, 52
...Presser foot lifting pedal, 53...Starting pedal, which constitutes the first and second input devices together with the above-mentioned 52, Wl...Working cloth, W
2. Sewing piece, F.. Feeding device, N.. Stitch forming device,
B: Bending device, S: Sewing piece supply device.

Claims (1)

[Claims] 1. A stitch forming device (N) including a needle (2) that is moved up and down, a feed plate (6) arranged on a bed surface on which a work cloth (W1) can be placed, and its Moving between an active position where the sewing piece (W2) supplied onto the work cloth (W1) is pressed toward the feed plate (6) and the bed surface and a non-active position where it is separated upward from the active position. A sewing machine including a presser plate (7) that is attached to the sewing machine and a feeding device (F) that is moved relative to the needle (2), and a sewing piece (W2) that is fed to the feeding device (F). A template (19) to be placed and a sewing piece (W) on the template (19).
2) and a holding piece (23) that presses and holds the feed plate (2), and a supply position that enters between the feed plate (6) and the press plate (7);
A sewing piece supply device (S) that is switched and moved from its supply position to a standby position that is spaced laterally; and a sewing piece that is arranged to enter between the feed plate (6) and the presser plate (7). (W2), a folding device (B) equipped with a folding piece (35) for folding so as to surround the template (19), the seam forming device (N), and a feeding device (F). ,
a first input device (52, 53) that inputs a signal for operating the sewing piece supply device (S) and the bending device (B); and an input signal from the first input device (52, 53). a first control device (51) that automatically performs a series of operations consisting of supplying, folding, and sewing the sewing piece (W2) by controlling the operation of each device according to a predetermined order based on the above-mentioned information; a second input device (53) that inputs a predetermined signal during the sewing operation of the sewing machine; and a sewing piece supply device (53) that inputs a predetermined signal during the sewing operation in response to the input signal from the second input device (53). At the same time, the sewing piece holding operation by S) is started, and the presser plate (
After returning to the non-working position of 7), the sewing piece supply device (
A sewing machine characterized by comprising: a second control device (51) for moving the sewing machine S) from a standby position to a supply position.