JP5149541B2 - Cloth position adjustment device - Google Patents

Description

  The present invention relates to a cloth position adjusting device that adjusts the position of a cloth in a sewing machine that performs edge over stitching for preventing cloth edge fraying.

An edge stitch sewing machine is known that performs edge stitching to prevent fraying of the yarn at the end of the fabric after cutting cloth such as slacks and blouses.
As shown in FIG. 8 (a), there is a cloth 101 in which the edge of the cloth is formed in a curved shape when performing edge stitching. The cloth 101 needs to be rotated in the B direction in addition to feeding the cloth 101 in the feeding direction A so that the cloth end is below the needle drop position 102.
Therefore, the edge stitching machine is provided with a sensor 103 for detecting the cloth edge of the cloth 101 fed in the feeding direction A and a spherical pressure body 104 for pressing the cloth 101 from above when the cloth edge is lowered. ing. When the sensor 103 no longer detects the cloth edge, the presser body 104 is lowered to press the cloth 101 from above, and the cloth 101 is rotated around the presser body 104 by the driving force of feeding in the feeding direction A. (For example, refer to Patent Document 1).
As a result, as shown in FIG. 8B, even if the cloth end is curved, the cloth end can be guided below the needle 102 by rotating the cloth 101.
JP-A-63-226394

However, in the case of a relatively long cloth such as slacks or a blouse, the weight of the cloth is large, and the cloth 101 may not be smoothly rotated only by pressing with the pressing body 104.
Further, as shown in FIG. 9A, in the cloth 105 in which a concave portion 105a that is recessed inward is formed on the cloth edge like a slack cloth, the sensor 103 cannot detect the cloth edge. Then, the cloth 105 is pressed by the pressing body 104 and the cloth 105 is rotated. However, even if the cloth 105 is rotated, the cloth end that forms the recess 105a cannot be moved to the guide 106 that leads to the needle drop position. Therefore, as shown in FIG. 9B, the cloth end of the recess 105a is sewn. The puncture 107 was not generated, and a perfect edge stitch was not formed. Therefore, it is necessary for the operator to push out the cloth toward the guide 106 by manual work, which is a factor of reducing the sewing efficiency. In addition, there is a problem that the quality of the sewing product is lowered due to the occurrence of the puncture 107.

  Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a cloth position adjusting device that can improve sewing efficiency and prevent occurrence of puncture.

  According to the first aspect of the present invention, in the cloth position adjusting device, the movable body is configured to be elastically deformable, moved in the vertical direction, a vertical movement mechanism for moving the movable body up and down, and a position where the cloth can be sewn. A guide for guiding, a first detection means provided in the vicinity of the guide for detecting the end side of the cloth guided along the guide, and configured to be elastically deformable, with a base end fixed to the moving body In addition, a support body is formed so as to extend toward the guide, and is arranged so as to be inclined downward from the base end section toward the tip section, and is provided at the tip section of the support body, When the movable body is lowered, and when the cloth is no longer detected by the first detection means when the movable body is lowered, the movable body is lowered by the vertical movement mechanism and the cloth is pressed by the movable body. The Control means for pushing the cloth to a position guided by the guide and for lifting the moving body by the vertical movement mechanism to separate the pressing body from the cloth when the first detection means detects the cloth. And.

According to the first aspect of the present invention, when the cloth is no longer detected by the first detecting means, the control means lowers the moving body by the vertical movement mechanism and presses the cloth by the pressing body, thereby guiding the cloth. The cloth is pushed out to the position guided by. When the lowering of the moving body is blocked by the pressing of the cloth by the pressing body, the moving body becomes elastically deformable in the direction in which the force is applied. At this time, the support body is configured to be elastically deformable, the base end portion is fixed to the moving body, the tip end portion is formed to extend toward the guide, and the base end portion is lowered from the base end portion toward the tip end portion. Therefore, when the moving body is lowered, the support body is elastically deformed so that the tip portion thereof faces the guide, and the holding body provided on the support body is The cloth can be moved toward the guide along with the elastic deformation of the support, and the cloth can be pushed out to a position guided by the guide.
Thereby, the operator can automatically perform the operation of pushing the cloth toward the guide manually by the lowering of the moving body, and the sewing efficiency can be improved. Moreover, by extruding the cloth with the presser, the occurrence of puncture can be prevented and the quality of the sewn product can be prevented from deteriorating.
Further, when the cloth is pushed out by the pressing body and the first detecting means detects the cloth, the control means raises the moving body by the vertical movement mechanism to separate the pressing body from the cloth.
As a result, when the cloth edge is detected by the first detection means, the pushing of the cloth by the pressing body is stopped, so that the cloth is pushed out by an appropriate amount without pushing the cloth toward the guide more than necessary. Can do.

The invention described in claim 2 is the fabric position adjusting device according to claim 1, the second to detect the end side of the provided on the inner side of the first detecting means, a cloth which is guided along the guide When the second detection means does not detect the cloth, a warning to that effect is issued and the moving body is controlled not to descend by the vertical movement mechanism.

According to the second aspect of the present invention, the cloth position can be adjusted with higher accuracy by detecting the cloth edge with the second detecting means in addition to the first detecting means.
In addition, when the cloth end shape is sharply cut off to the needle side, the second detection means does not detect the cloth, so it is determined that the cloth is out of the range where the cloth can be guided to the guide by the vertical movement mechanism, and accordingly Is controlled so that the vertical movement mechanism does not descend.

  According to a third aspect of the present invention, in the cloth position adjusting device according to the first or second aspect of the present invention, the cloth position adjusting device further includes an adjustment member that adjusts a height difference between the base end portion and the tip end portion of the support.

According to the third aspect of the present invention, the height position of the pressing body provided at the distal end portion of the support body is adjusted by adjusting the height difference between the base end portion and the distal end portion of the support body by the adjusting member. be able to.
Here, when lowering the moving body with the same stroke, adjusting the height position of the presser body to a low position close to the cloth accelerates the contact between the presser body and the cloth, so the presser body presses the cloth with a large force. When the height position of the presser body is adjusted to a high position far from the cloth, the contact between the presser body and the cloth is delayed, so that the presser body can press the cloth with a small force. That is, the pressing force by the pressing body can be adjusted according to the thickness, weight, and type of the cloth only by adjusting the adjusting member.

According to the first aspect of the present invention, the operator can automatically perform the work of pushing the cloth toward the guide by the manual operation by the lowering of the moving body, and the sewing efficiency can be improved. Moreover, by extruding the cloth with the presser, the occurrence of puncture can be prevented and the quality of the sewn product can be prevented from deteriorating.
Further, if the cloth edge is detected by the detection means, the cloth is not pushed out by the pressing body, so that the cloth can be pushed out by an appropriate amount without pushing the cloth toward the guide more than necessary.

  According to the second aspect of the present invention, the cloth position can be adjusted with higher accuracy by detecting the cloth edge with the second detecting means in addition to the first detecting means.

  According to the third aspect of the present invention, the pressing force by the pressing body can be adjusted according to the thickness, weight, and type of the cloth only by adjusting the adjusting member.

Hereinafter, the best mode of the cloth position adjusting device will be described in detail with reference to the drawings.
<Configuration of cloth position adjusting device>
As shown in FIGS. 1 to 3, the cloth position adjusting device 1 is configured to be elastically deformable, and a movable body 2 that moves up and down, a vertical movement mechanism 3 that moves the movable body 2 up and down, and a cloth C A guide 4 that guides the sewing machine to a sewing position, and a first cloth edge detection sensor 5 that is provided in the vicinity of the guide 4 and that detects the presence of the cloth C guided along the guide 4. The second cloth end detection sensor 11 as the second detection means for detecting the presence of the cloth C on the needle side (inner side) from the first cloth end detection sensor 5 is configured to be elastically deformable, and the base end portion 61 moves. A support body that is fixed to the body 2 and that is formed so that the distal end portion 62 extends toward the first cloth end detection sensor 5 and is inclined downward from the proximal end portion 61 toward the distal end portion 62. 6 and the tip 62 of the support 6 and the moving body 2 descends. When the cloth C is no longer detected by the first cloth end detection sensor 5 and the presser body 7 that presses the cloth C at a position between the moving body 2 and the cloth end detection sensor 5, the vertical movement mechanism 3 When the movable body 2 is lowered and the cloth C is pressed by the pressing body 7 to push the cloth C to the position where the cloth C is guided by the guide 4, and the first cloth edge detection sensor 5 detects the cloth C. And a control device 8 as a control means for moving the movable body 2 up by the vertical movement mechanism 3 to separate the presser body 7 from the cloth C, and an adjustment for adjusting the height difference between the base end portion 61 and the front end portion 62 of the support 6. And a member 9.

(Moving body and vertical movement mechanism)
As shown in FIGS. 1 to 3, the vertical movement mechanism 3 is provided on the sewing machine frame M. The vertical movement mechanism 3 includes a solenoid 31 attached to the sewing machine frame M, a first link 32 connected to the output shaft 31a of the solenoid 31, and a second link 33 connected to the first link 32. A third link 34 connected to the second link 33, one end connected to the sewing machine frame M, the other end connected to the moving body 2, and a spring 35 for urging the moving body 2 upward. I have. In the solenoid 31, the output shaft 31a is rotatable around the axis, and when the output shaft 31a rotates, the first link 32 also rotates around the connection point with the output shaft 31a. The second link 33 is connected to the first link 32 so that it can reciprocate in one direction by the rotation of the first link 32. One end of the third link 34 is rotatably connected to the sewing machine frame M. The second link 33 is rotatably connected to the third link 34 in the vicinity of the center in the longitudinal direction. At the other end of the third link 34, an outer edge is formed in a circular shape, and a contact member 36 whose outer edge contacts the contact plate 21 at the upper end of the moving body 2 is rotatably provided.

The moving body 2 is urged upward by a spring 35, and the contact member 36 moves the moving body 2 downward against the urging force of the spring 35 as the third link 34 rotates around one end. Can be pushed down.
The moving body 2 is arranged such that the longitudinal direction thereof is along the vertical direction, and a contact plate 21 that contacts the contact member 36 is provided at the upper end. A spring 35 is connected to the lower end of the moving body 2.
The moving body 2 is formed from a spring steel plate that is elastically deformed by a load. And after the moving body 2 is lowered | hung and the presser body 7 contact | abuts to the cloth C, it is provided so that it may elastically deform to the presser body 7 side (right direction in FIG. 1).

(Support and presser)
As shown in FIGS. 1 to 4, an attachment plate 22 for attaching the support 6 and the adjustment member 9 is provided at the lower end of the moving body 2. A base end portion 61 of the support 6 is attached to the attachment plate 22. The support body 6 is formed of a spring steel plate that can be elastically deformed, and is curved so as to be inclined downward from the base end portion 61 toward the distal end portion 62 of the support body 6 when attached to the attachment plate 22. It is arranged with.
The front end portion 62 of the support body 6 is provided with a pressing body 7 that presses the cloth C formed in a spherical shape from above. Two pressing bodies 7 are provided so as to be in contact with the front end portion 62 of the support 6 side by side, and the position on the cloth C suspended from the contact points of the two pressing bodies 7 rotates the cloth C. Become the center.

(Adjustment member)
As shown in FIGS. 1 to 4, the attachment plate 22 is provided with an adjustment member 9 that is used to curve the support body 6 and adjust the height position of the pressing body 7. The adjustment member 9 includes a nut 91 fixed to the upper surface of the mounting plate 22 and a bolt 92 that is screwed into the nut 91 and moves in the vertical direction by rotating around the axis.
The lower end portion of the bolt 92 is in contact with the vicinity of the tip end portion 62 of the support body 6, and the lower end portion of the bolt 92 moves downward as the bolt 92 is screwed down and moved. Can be approached. On the other hand, as the bolt 92 is moved upward so as to be removed from the nut 91, the lower end portion of the bolt 92 moves upward, so that the presser body 7 can be moved away from the cloth C.
That is, when the descending stroke of the moving body 2 is the same, as the bolt 92 is moved downward, the presser body 7 is also moved downward. Therefore, the force for pressing the cloth C by the presser body 7 is increased, and the bolt 92 is moved upward. Since the presser body 7 is also moved upward as it is moved to the position, the force for pressing the cloth C by the presser body 7 becomes smaller.

(Guide and cloth edge detection sensor)
As shown in FIG. 5, a guide 4 is provided on the sewing machine table T on which the sewing machine frame M is erected and the cloth C is placed on the upper surface, and guides the cloth edge when performing edge stitching. A first cloth edge detection sensor 5 for detecting the cloth edge is provided on the upstream side of the guide 4 in the cloth feeding direction. The first cloth edge detection sensor 5 is disposed slightly inside the side edge of the guide 4.
A second cloth end detection sensor 11 that detects the presence of the cloth C is provided on the needle side (inside along the direction Y perpendicular to the cloth feeding direction X) from the first cloth end detection sensor 5. The straight line connecting the intermediate point between the first cloth edge detection sensor 5 and the second cloth edge detection sensor 11 and the needle drop position 12 is arranged so as to be parallel to the cloth feed direction X.
A knife 10 for cutting the cloth end is provided on the downstream side of the guide 4 in the cloth feeding direction.
Further, the guide 4 is provided so as to be substantially along the direction orthogonal to the presser body 7 and the cloth feeding direction. This is because the cloth C pushed out by the pressing body 7 is abutted against the guide 4.

(Control device)
As shown in FIG. 6, the control device 8 includes a CPU 81 that transmits a control signal to the solenoid 31 based on detection signals received from the first cloth edge detection sensor 5 and the second cloth edge detection sensor 11, and the CPU 81 performs processing. A ROM 82 that stores programs, data, and the like, and a RAM 83 that serves as a work area where the CPU 81 develops and processes the programs and data stored in the ROM 82 are provided.
The control device 8 is connected to the first cloth edge detection sensor 5 and the second cloth edge detection sensor 11 and receives a detection signal from the cloth edge detection sensor 5. A solenoid 31 is connected to the control device 8, and based on detection signals from the first cloth edge detection sensor 5 and the second cloth edge detection sensor 11, transmission or stop of a control signal relating to drive control to the solenoid 31 is performed. Do.

<Cloth position adjustment processing>
Next, the cloth position adjustment processing by the cloth position adjusting apparatus 1 will be described.
As shown in FIG. 7, the control device 8 determines whether or not the second cloth edge detection sensor 11 is turned on (step S1). When the control device 8 determines that the second cloth edge detection sensor 11 is turned on (step S1: YES), the control device 8 determines whether the first cloth edge detection sensor 5 is turned on (step S1). S2).
On the other hand, when the control device 8 determines in step S1 that the second cloth edge detection sensor 11 is OFF (step S1: NO), the control device 8 indicates that the cloth position and the cloth edge shape are not appropriate. A warning is given (step S3). The warning can be performed by an alarm sound, a warning display on the operation panel, lighting / flashing of a warning lamp, or the like.

After the warning in step S3 or when the control device 8 determines in step S2 that the first cloth edge detection sensor 5 is ON (step S2: YES), the control device 8 performs the edge stitching process. It is determined whether or not the processing has been completed (step S4). Here, if the control device 8 determines that the edge stitching process has been completed (step S4: YES), the control device 8 ends the present process. On the other hand, if the control device 8 determines that the edge stitching process has not been completed (step S4: NO), the control device 8 returns to the process of step S1.
In step S2, when the control device 8 determines that the first cloth edge detection sensor 5 is OFF (step S2: NO), the control device 8 drives the solenoid 31 as shown in FIG. Then, the moving body 2 is lowered (step S5). The cloth C is pressed by the pressing body 7 by the lowering of the moving body 2, and further, the pressing body 7 moves toward the guide 4 by elastic deformation of the moving body 2 to be lowered. Thereby, as shown in FIGS. 4B, 4 </ b> C, and 5 </ b> A, the cloth C pressed against the pressing body 7 is also pushed out toward the guide 4.

Then, after driving the solenoid 31, the control device 8 determines whether or not the first cloth edge detection sensor 5 is ON (step S6). When the control device 8 determines that the first cloth edge detection sensor 5 is ON (step S6: YES), the control device 8 drives the solenoid 31 to raise the moving body 2 by the biasing force of the spring 35 (step S7). ). As the moving body 2 moves up, the cloth C pressed by the pressing body 7 is released, and the pushing of the cloth C onto the guide 4 stops. On the other hand, when the control device 8 determines that the first cloth edge detection sensor 5 is OFF (step S6: NO), the control device 8 returns to the process of step S5.
After the moving body 2 is raised in step S7, the control device 8 determines whether or not the edge stitching process is completed (step S4). Here, if the control device 8 determines that the edge stitching process has been completed (step S4: YES), the control device 8 terminates this process and determines that the edge stitching process has not been completed (step S4: NO). ), The control device 8 returns to the process of step S1.

<Action and effect>
As described above, according to the cloth position adjusting device 1, when the cloth C is no longer detected by the first cloth edge detection sensor 5, the control device 8 lowers the moving body 2 by the vertical movement mechanism 3 and presses the pressing body. The cloth C is pressed by 7 and pushed out to a position where the cloth C is guided by the guide 4. When the lowering of the moving body 2 is blocked by the pressing of the cloth C by the pressing body 7, the moving body 2 becomes elastically deformable in the direction in which the force is applied. At this time, the support body 6 is configured to be elastically deformable, the base end portion 61 is fixed to the moving body 2, and the distal end portion 62 is fixed to extend toward the guide 4. When the body 2 is lowered, the support body 6 is elastically deformed so that the front end portion 62 faces the guide 4, and the pressing body 7 provided at the front end portion 62 of the support body 6 is fixed to the support body 6. The cloth C moves toward the guide 4 along with the elastic deformation, and the cloth C can be pushed out to a position guided by the guide 4.

Thereby, the operator can automatically perform the operation of pushing the cloth C toward the guide 4 by the manual operation by the lowering of the movable body 2, and the sewing efficiency can be improved. Further, by extruding the cloth C with the presser body 7, it is possible to prevent the occurrence of puncture and prevent the quality of the sewing product from being lowered.
Further, when the cloth end C is detected by the cloth end detection sensor 5 while the cloth C is being pushed out by the pressing body 7, the control device 8 raises the moving body 2 by the vertical movement mechanism 3 and presses the cloth C from the cloth C. The body 7 is separated.
Thereby, if the cloth edge is detected by the first cloth edge detection sensor 5 and the second cloth edge detection sensor 11, the pushing out of the cloth C by the pressing body 7 is stopped. The cloth C can be pushed out by an appropriate amount without being pushed out.

Further, according to the cloth position adjusting device 1, the pressing member 7 provided at the distal end portion 62 of the support body 6 is adjusted by adjusting the height difference between the base end portion 61 and the distal end portion 62 of the support body 6 by the adjusting member 9. The height position of can be adjusted.
Here, when the movable body 2 is lowered with the same stroke, if the height position of the pressing body 7 is adjusted to a low position close to the cloth C, the pressing body 7 and the cloth C are brought into contact with each other earlier. The cloth C can be pressed with a large force, and when the height of the presser body 7 is adjusted to a high position far from the cloth C, the contact between the presser body 7 and the cloth C is delayed. C can be pressed down. That is, the pressing force by the pressing body 7 can be adjusted according to the thickness, weight, and type of the cloth C only by adjusting the adjusting member 9.

The front view of a cloth position adjusting device. The top view of a cloth position adjusting device. The side view of a cloth position adjusting device. The figure explaining operation | movement of the cloth position adjusting device. The figure explaining operation | movement of the cloth position adjusting device. The block diagram of the control system of a cloth position adjusting device. The flowchart which shows the process of the cloth position adjustment by the cloth position adjustment apparatus. The figure explaining operation | movement of the cloth position adjustment apparatus in a prior art. The figure explaining the problem of the cloth position adjustment apparatus in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cloth position adjustment apparatus 2 Moving body 3 Vertical movement mechanism 4 Guide 5 1st cloth edge detection sensor (1st detection means)
6 Support body 7 Presser body 8 Control device (control means)
9 Adjustment member 11 Second cloth edge detection sensor (second detection means)
61 Base end 62 End C C Cloth N Needle

Claims (3)

A movable body configured to be elastically deformable and moving in the vertical direction;
A vertical movement mechanism for moving the movable body up and down;
A guide for guiding the cloth to a sewing position;
A first detection means provided in the vicinity of the guide for detecting an end side of the cloth guided along the guide;
It is configured to be elastically deformable, and the base end portion is fixed to the moving body, and the tip end portion is formed to extend toward the guide, and is arranged to be inclined downward from the base end portion toward the tip end portion. A supported support;
A pressing body that is provided at the tip of the support and presses the cloth when the moving body is lowered;
When the cloth is no longer detected by the first detection means, the movable body is lowered by the vertical movement mechanism, and the cloth is pushed down by the pressing body to push the cloth to a position where the cloth is guided by the guide. And a control means for raising the movable body by the vertical movement mechanism to separate the pressing body from the cloth when the first detection means detects the cloth,
A cloth position adjusting device comprising: Provided on the inner side of the first sensing means comprises a second detecting means for detecting the end side of the fabric which is guided along the guide, when said second detecting means does not detect the cloth warning to that effect The cloth position adjusting device according to claim 1, wherein the movable body is controlled so as not to descend by the vertical movement mechanism.   The cloth position adjusting device according to claim 1 or 2, further comprising an adjusting member that adjusts a height difference between a base end portion and a tip end portion of the support.

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