JP2903430B2 - Sewing guide for sewing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing guide device for a sewing machine, and in particular, corrects a positional deviation of a sewing object to a proper position before sewing by moving the sewing object. The present invention relates to a sewing guide device for a sewing machine.

2. Description of the Related Art Conventionally, when sewing by a sewing machine, a sewing sewing guide device for a sewing machine that corrects a positional deviation of a sewing object to a normal position has been used in order to correctly perform sewing at a normal position of the sewing object. I have.

As a conventional sewing guide for this type of sewing machine,
The technology described in JP-A-57-16834 can be mentioned.

In this publication, while the pinion is constantly pressed against the cloth to be sewn, the pinion is rotated forward or backward to appropriately move the pinion in a direction orthogonal to the direction in which the cloth is fed, and the position of the cloth is changed. A modifying technique is disclosed. That is, the sewing guide device for the sewing machine
An arm having a pinion for position adjustment at the tip is tilted toward the surface of the workpiece and swingably supported, the pinion at the tip is pressed against the surface of the workpiece, and the pinion is fixed to the tip of the arm. It is driven directly by a motor via a transmission mechanism. The operation of pressing the pinion against the work is performed by an air cylinder that swings the arm, and this air cylinder is also used when setting the work.

In addition to the above publication, there is a sewing guide device for sewing machines capable of coping with attachment to the sewing machine main body and position adjustment. As a conventional sewing guide device for this type of sewing machine, Japanese Utility Model Publication No. Sho 62-4307. The technology described in the gazette can be cited.

This publication discloses that one of the mounting members for attaching the sewing guide device to the sewing machine main body is fixed to the sewing machine main body, and the other of the mounting members holds the cover member of the sewing sewing guide device so as to be capable of raising and lowering freely. Discloses a technique for coping with attachment and position adjustment of a sewing guide device for a sewing machine to a sewing machine main body. Further, in the sewing guide device for a sewing machine, a detection member for detecting a position of the sewing object for adjusting a sewing margin of the sewing object is held by a holding plate that is swingably inserted into the cover member. An adjusting mechanism for moving the detecting member in a direction crossing the cloth feeding direction is provided.

[Problem to be Solved by the Invention] In the conventional sewing guide device for a sewing machine as described above, an operator manually attaches or adjusts a position to a sewing machine main body,
It was compatible with needle and thread replacement and maintenance. In addition, the operator manually operates the adjustment transition, and moves the detection member for detecting the position of the sewing object in a direction crossing the cloth feeding direction to adjust the sewing allowance of the sewing object.

Therefore, it is necessary to manually move the entire device at the time of needle and thread replacement work, maintenance of the sewing guide device for the sewing machine, or each time the sewing allowance of the sewing material is adjusted, which is troublesome and troublesome. It was correct. In particular, it is not suitable for use in a sewing machine that sequentially sews workpieces having different seam allowances one after another. For this reason, automation of the movement of the sewing guide device for the sewing machine has been desired.

In view of the above, the present invention can correct the positional deviation of the workpiece to a predetermined position before sewing when sewing with a sewing machine, and can adjust the sewing allowance position of the workpiece without manual operation by an operator. An object of the present invention is to provide a sewing guide device for a sewing machine that can easily perform operations and the like.

[Means for Solving the Problems] A sewing guide device for a sewing machine according to the present invention detects a positional shift of an object to be sewn and, in accordance with the detection output, moves the object to be sewn substantially perpendicularly to a cloth feeding direction before sewing. The sewing object position correcting means for determining the sewing allowance by moving the end of the sewing object to a predetermined position by moving the sewing object end position to a predetermined position, and the contact state between the sewing object position correcting means and the sewing object. A contact releasing means for releasing the sewing object position correcting means and the contact releasing means in a direction substantially perpendicular to the cloth feeding direction to change the predetermined position, if necessary. It is.

[Operation] In the present invention, the position shift of the sewing object is detected, and in accordance with this detection, the sewing object is moved to a regular position before sewing, and the contact state with the sewing object is changed as necessary. To move each mechanism for guiding the sewn object horizontally in a direction substantially perpendicular to the cloth feed direction of the sewn object.When sewing with the sewing machine, correct the misalignment of the sewn object before sewing. In addition to being able to correct the position correctly, when replacing needles and threads and performing maintenance work on the sewing guide device for sewing machines,
Alternatively, it is possible to move the sewing guide device for sewing machine without manual operation by an operator at the time of adjusting the sewing allowance of the workpiece.

[Example] Hereinafter, an example of the present invention will be described.

FIG. 1 is a perspective view showing a sewing guide device for a sewing machine according to an embodiment of the present invention, and FIG. 2 is a diagram showing a state of contact of a sewing guide device for a sewing machine according to an embodiment of the present invention with a workpiece. FIG. 3 is a main part mechanism diagram showing a state in which the sewing guide device for a sewing machine according to one embodiment of the present invention is detached from a workpiece.

In the figure, a predetermined stitch 3 is formed on a workpiece 2 by repeatedly reciprocating a needle 1 of a sewing machine in a vertical direction. Usually, the seam 3 is formed while keeping a predetermined seam allowance 4 from the end of the workpiece 2. In the sewing guide device for a sewing machine, the end of the workpiece 2 is constantly sensed by the sensor 5 to detect a displacement of the workpiece 2. The sewing guide device for the sewing machine is covered by a cover member 6, the sensor 5 is provided on the cover member 6, and a cloth guide plate 7 for guiding the workpiece 2 is provided below the cover member 6. Has been established. Then, the sewing is performed by the sewing machine in a state where the workpiece 2 is interposed between the cloth guide plate 7 and the rotating wheel 8. The rotating wheel 8 is composed of a cloth drive wheel 8a having a knurl for non-slip engraved therearound and a pulley 8b rotating integrally with the cloth drive wheel 8a.
The pin 9a rotatably supports the pin 9a.
The rotating wheel 8 is rotated by a timing belt 11, and the timing belt 11 is driven by a forward / reverse rotation motor 12 via a pulley 13. Therefore, the rotating wheel 8 rotates according to the rotating operation of the forward / reverse rotation motor 12. The forward / reverse rotation motor 12 is fixed to the rocking body 9, and the forward / reverse rotation motor 12 is urged downward by a spring 14. The urging force of the spring 14 is adjusted by a pressing adjuster 15 screwed on the cover member 6. A motor 16 is provided on the cover member 6, and a rotating cam 17 of the motor 16 has a circular cam body 18.
Is installed. When the cam body 18 rotates eccentrically about the rotation shaft 17 by the rotation of the motor 16,
The rocking body 9 performs a predetermined rocking operation. In response to the swinging operation of the swinging body 9, the contact between the rotating wheel 8 and the workpiece 2 and the separation thereof are alternately repeated. That is, the contact portion 18a of the cam body 18
Is located on the rocking body 9 side, the rotating wheel 8 and the workpiece 2
Are in contact with each other (see FIG. 2), and when the detachment portion 18b is located on the rocking body 9 side, the rotating wheel 8 and the workpiece 2 are in a detached state (see FIG. 3). The other end 9 b of the oscillating body 9 on the side opposite to the rotating wheel 8 is in a state where it can be pressed by an air cylinder 19 attached to the cover member 6. The air cylinder 19 operates when the sewing work 2 is set, for example,
By pressing the end 9b of the oscillator 9 downward, the rotating wheel 8 located at the other end 9a of the oscillator 9 is pushed upward. The rocking body 9 is rotatable about a support shaft 20, and the support shaft 20 is fitted into the hole 6 a of the cover member 6 to support the rocking body 9.

Further, the cover member 6 is connected to the moving member 31 via the mounting member 30.
It is fixed to. The moving member 31 can slide along a guide shaft 32, and the guide shaft 32 is mounted on a base 33 which is a base. A ball screw 34 is mounted on the base 33 in parallel with the guide shaft 32.
The moving member 31 moves in accordance with the rotational drive of the. The moving amount and moving direction are regulated by the guide shaft 32 and the ball screw 34. The base 33 is fixed to the main body of the sewing machine. A pulley 35 is attached to an end of the ball screw 34, and a driving force of a forward / reverse rotation motor 37 is transmitted via a timing belt 36. That is, the rotation of the pulley 38 mounted on the rotation shaft of the forward / reverse rotation motor 37 drives the timing belt 36, and the pulley 35 and the ball screw 34 rotate integrally. This pool 35 and ball screw
The number of rotations of 34 is detected by the encoder 39, and the position of the cover member 6 is obtained from the detection result. As a result, the position of the cover member 6 may be automatically controlled based on information from the encoder 39.

The sewing guide device for a sewing machine according to this embodiment is configured as described above, and when forming the stitch 3 on the work 2, the sensor 5 detects the end of the work 2, and the detection signal is output. In response, the control device (not shown) gives a rotation instruction to the forward / reverse rotation motor 12. The forward / reverse rotation motor 12 is appropriately rotated by the rotation instruction, and the rotating wheel 8 is rotated via the timing belt 11. That is, the rotating wheel 8 rotates forward, reverse, and stops according to the forward rotation, reverse rotation, and stop of the forward and reverse rotation motor 12. By the rotation of the rotating wheel 8, the workpiece 2 held between the cloth driving wheel 8a and the cloth guide plate 7 moves. The moving direction of the sewing object 2 is perpendicular to the cloth feeding direction of the sewing object 2.
In this way, by appropriately moving the workpiece 2 in the direction perpendicular to the cloth feeding direction, the positional deviation of the workpiece 2 is corrected to a proper position before sewing, and a predetermined sewing margin 4 is secured.

Further, when forming the seam 3 on the workpiece 2, a well-known cloth feeding operation by a cloth feeding device (not shown) is performed in accordance with the reciprocating movement of the needle 1. The cloth feeding device performs a feeding operation in synchronization with a rotation pulse signal of the sewing machine. At this time, a motor drive control device (not shown) drives the motor 16 in response to the rotation pulse signal of the sewing machine. And
When the motor 16 rotates, the cam body 18 attached to the rotating shaft 17 of the motor 16 also rotates, and the swing body 9 swings by the rotation of the cam body 18. That is, the cam body 18 rotates eccentrically about the rotation shaft 17, and when the contact portion 18a of the cam body 18 is located on the rocking body 9 side, the cam body 18 and the rocking body 9 are in a non-contact state, The end 9a of the swinging body 9 swings downward about the support shaft 20 by the urging force of the spring 14.
On the other hand, when the detaching portion 18b of the cam body 18 is located on the side of the rocking body 9, the cam body 18 and the rocking body 9 are in contact with each other, and the rocking body 9 moves the support shaft 20 against the urging force of the spring 14. The end 9a swings upward as a fulcrum. As a result, when the contact portion 18a of the cam body 18 is located on the side of the rocking body 9, the rotating wheel 8 and the workpiece 2 come into contact with each other, and the rotating wheel 8 is pressed against the workpiece 2 (the 2). On the other hand, the detaching portion 18 of the cam body 18
When b is located on the rocking body 9 side, the contact state between the rotating wheel 8 and the workpiece 2 is released, and the rotating wheel 8 and the workpiece 2 are separated (see FIG. 3). Thus, the oscillator 9
Is synchronized with the rotation of the sewing machine and also with the cloth feeding operation by the cloth feeding device. Therefore, while the sewing object 2 is in the moving state in the cloth feeding direction, the rotating wheel 8 and the sewing object 2 are separated from each other, and the rotating wheel 8 prevents the moving of the sewing object 2 in the cloth feeding direction. It will not be done. In addition, while the movement of the sewing object 2 in the cloth feeding direction is stopped, the rotating wheel 8 and the sewing object 2 are in contact with each other. At this time, the rotation of the cloth driving wheel 8a causes the rotation of the sewing object 2. Is adjusted in the direction perpendicular to the cloth feeding direction.

Further, the cover member 6 is moved by the moving member 31 through the mounting member 30.
, The sensor 5 attached to the cover member 6 moves together with the movement of the moving member 31 and the cover member 6. Therefore, the sensing position of the end of the workpiece 2 by the sensor 5 changes, and as a result, the relative distance between the needle 1 and the sensor 5 changes, and the width of the sewing margin 4 also changes according to this change. In this way, by appropriately changing the position of the sensor 5 by moving the cover member 6, the width dimension of the seam allowance 4 can be extremely easily adjusted. Since the cover member 6 cannot be moved while the workpiece 2 is held between the cloth guide plate 7 and the rotating wheel 8, the air cylinder 19 must be moved before the cover member 6 is moved. Activate the end of rocking body 9
9b must be pressed downward to release the contact between the rotating wheel 8 and the sewing object 2. Also, the cover member 6
, The other mechanisms mounted on the cover member 6 also move together, so that a work area near the needle 1 is secured, the needle 1 and thread exchange work is facilitated, and The maintenance work of the sewing guide device can also be facilitated. Moreover, in this embodiment, the movement of the cover member 6 can be achieved by driving the forward / reverse rotation motor 37 without manual operation by the operator.

As described above, the sewing guide device for the sewing machine according to the present embodiment detects the displacement of the sewing object 2 at the end of the sewing object 2 by the sensor 5 and, according to the detection of the sensor 5, performs the sewing before the sewing. Sewing object position correcting means for rotating the rotating wheel 8 of the end 9a of the rocking body 9 via the timing belt 11 by driving the forward / reverse rotation motor 12 to move the sewing object 2 to a normal position;
Contact releasing means for releasing the contact state between the sewing object position correcting means and the sewing object 2 as necessary by adjusting the seam allowance 4 by pressing the end 9b of the rocking body 9 with the air cylinder 19. The cloth feeding direction of the sewing object 2 by moving the moving member 31 and the cover member 6 by rotating the ball screw 34 with the driving force of the forward / reverse rotation motor 37 to move the sewing object position correcting means and the contact releasing means. And a moving means that is horizontally moved in a direction substantially perpendicular to the moving means.

Then, a positional deviation of the sewing object 2 is detected, and in accordance with this detection, the sewing object 2 is moved to a regular position before sewing, and a contact state with the sewing object is released as necessary. Each mechanism for guiding the sewing object is horizontally moved in a direction substantially perpendicular to the cloth feeding direction of the sewing object using the driving force of the motor.

Therefore, when sewing by the sewing machine, the positional deviation of the workpiece 2 can be corrected to a normal position before the sewing as in the related art. For this reason, it is possible to sew correctly at the regular position of the workpiece 2. Also, as in the prior art, when replacing the needle 1 or thread, maintaining the sewing guide device for the sewing machine,
It is not necessary to manually move the entire apparatus every time the sewing margin 4 is adjusted. For this reason, the replacement work of the needle 1 and the thread, the maintenance work of the sewing guide device for the sewing machine, or the adjustment work of the seam allowance 4 of the workpiece 2 is facilitated, and the workability is greatly improved. In particular, when sewing materials having different seam allowances are used for a sewing machine that sequentially sews one after another, automation of sewing work by the sewing machine can be greatly promoted.

Next, another embodiment of the sewing guide device for the sewing machine will be described.

In the above embodiment, the detection of the displacement of the sewing object 2 by the sewing object position correcting means is detected at the end of the sewing object 2 by the sensor 5, but the detection method and the number of the sensors 5 may be arbitrarily determined. It can be changed. For example, a non-contact light-sensitive sensor 5 is usually employed,
The end of the sewn article 2 may be detected by a contact method. The number of the sensors 5 is not limited to one, and a plurality of the sensors 5 may be provided to increase the accuracy of detection and improve the reliability of the entire apparatus. In the above embodiment, the detection of the positional deviation of the sewing object 2 by the sensor 5 is also performed based on the end of the sewing object 2, but the detection is performed based on the overlapping position of the sewing object 2. Alternatively, any position may be used as long as it is a reference position. However, a position where detection is as easy as possible should be selected.

The operation of moving the workpiece 2 to the normal position by the workpiece position correcting means is performed by rotating the rotating wheel 8 of the end 9a of the rocking body 9 via the timing belt 11 by driving the forward / reverse rotation motor 12. Although this is realized by moving the sewing object 2 to a regular position by using the timing belt 11, the sewing machine 2 may be moved by the timing belt 11 by pressing the timing belt 11 against the sewing object 2.

Furthermore, in the above-described embodiment, the air cylinder 19 presses the end 9b of the oscillating body 9 as the contact releasing means. However, a cam or a link mechanism may be used, or a hydraulic actuator or the like may be used. . Further, in order to release the contact state between the sewing object position correcting means and the sewing object 2 as necessary, the operation sequence is regulated so that the contact releasing means acts before driving the forward / reverse rotation motor 37. If
When the sewing guide device for a sewing machine is automated, it is possible to prevent the occurrence of secondary troubles such as damage to the sewing workpiece 2 and the like, to ensure proper continuous operation, and to improve the reliability of the entire device.

In addition to the above, in the above-described embodiment, a description has been given of an example in which the ball screw 34 is rotated by the driving force of the forward / reverse rotation motor 37 to move the moving member 31 and the cover member 6 as a moving means. What is necessary is just to perform automatically using a motor. For example, the moving member 31 and the cover member 6 are driven by a timing belt drive or a chain drive.
May be moved, or may be moved using a rack and pinion mechanism.

By the way, in the above embodiment, the case where the sewing guide device for sewing machine is mainly used for sewing fabric has been described.
Naturally, a high-frequency sewing machine for sewing a synthetic resin sheet or the like can also be used.

[Effects of the Invention] As described above, the sewing guide device for a sewing machine according to the present invention detects a positional deviation of a sewing object and, in accordance with the detection output, moves the sewing object substantially at right angles to the cloth feeding direction before sewing. The sewing object position correcting means for determining the sewing allowance by moving the end of the sewing object to a predetermined position by moving the sewing object end position to a predetermined position, and the contact state between the sewing object position correcting means and the sewing object. A contact releasing means for releasing the sewing object position correcting means and the contact releasing means in a direction substantially perpendicular to the cloth feeding direction to change the predetermined position, if necessary. Therefore, the position deviation of the sewing object is detected, and in accordance with this detection, the sewing object is moved to a regular position before sewing, and the contact state with the sewing object is released as necessary, Utilizes the driving force of the motor for each mechanism for guiding sewing products The sewing machine can be horizontally moved in a direction substantially perpendicular to the cloth feeding direction, and when sewing by the sewing machine, the positional deviation of the sewing object can be corrected correctly, so that the sewing can be performed at a regular position of the sewing object. At the same time, it is possible to move the sewing guide device for the sewing machine without manual operation by the operator at the time of replacement work of the needle or thread, maintenance work of the sewing guide device for the sewing machine, or adjustment work of the sewing allowance of the sewing object. Each of these operations is facilitated, workability is improved, and automation of sewing by the sewing machine can be promoted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sewing guide device for a sewing machine according to an embodiment of the present invention, and FIG. 2 is a diagram showing a state of contact of a sewing guide device for a sewing machine according to an embodiment of the present invention with a workpiece. FIG. 3 is a main part mechanism diagram showing a state in which the sewing guide device for a sewing machine according to one embodiment of the present invention is detached from a workpiece. In the figure, 1: Needle, 2: Workpiece 3: Stitch, 4: Seam allowance 5: Sensor, 7: Cloth guide plate 8: Rotating wheel, 8a: Cloth drive wheel 9: Oscillating body, 11: Timing belt 12: Forward / reverse rotation motor, 14: Spring 15: Press adjuster, 16: Motor 18: Cam body, 20: Support shaft 31: Moving member, 32: Guide shaft 34: Ball screw 36: Timing belt 37: Forward / reverse rotation motor. In the drawings, the same reference numerals and symbols indicate the same or corresponding parts.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshimi Kawamura 2-1-1 Asahi-cho, Kariya-shi, Aichi Aisin Seiki Co., Ltd. (72) Inventor Masahiro Sabashi 2-1-1 Asahi-cho, Kariya-shi, Aichi Aisin Seiki Examiner, Katsutoshi Shiozawa, Inc. (56) References JP-A-59-14881 (JP, A) JP-A-58-105789 (JP, A) JP-A-3-188892 (JP, A) JP-A-4- 108490 (JP, A) Jiko 62-4307 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) D05B 35/00-35/12

Claims (1)

(57) [Claims] 1. A position shift of a sewing object is detected, and in accordance with the detection output, the sewing object is moved in a direction substantially perpendicular to a cloth feeding direction before sewing to set an end of the sewing object in a predetermined direction. The position of the sewn object that fixes the sewing allowance by shifting to the position of the sewn object, the contact release unit that releases the contact state between the sewn object position correcting means and the sewn object as necessary, and the sewn object A moving means for moving the position correcting means and the contact releasing means in a direction substantially perpendicular to the cloth feeding direction to change the predetermined position.