JPH0133007Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention uses sewing machine stitching and cloth feeding to be repeated multiple times alternately to attach buttons at multiple locations on processed fabrics such as the bodice of various sewn products or finished products. The present invention relates to a sewing device that performs sewing continuously.

(Prior Art) Conventionally, in this type of sewing device, the workpiece cloth is held under tension on the top surface of the work table by a cloth holding member in order to prevent the positional shift of each sewing location or change in button spacing due to slack in the workpiece cloth. It is designed to be held and used for buttoning operations. However,
When a button sewing machine is driven, a feed force corresponding to the distance between the button holes is applied to the work cloth, so the feed force pulls the work cloth in a taut state, and the part of the work cloth held by the presser foot by the cloth holding member There has been a problem in that each sewing location is not correctly fed to the needle drop point of the button sewing machine because it is deviated from the fabric holding member.

(Problem to be solved by the invention) This invention was made to solve the above-mentioned problem, and its purpose is to prevent the front and rear presser members from approaching each other when the button sewing machine starts operating. By loosening the tensioned workpiece fabric, there is no fear that the holding position of the workpiece fabric will shift due to the sewing operation of the button sewing machine, and button sewing can be performed at accurate sewing positions and button spacing. The goal is to provide equipment.

(Means for Solving the Problems) The means in this invention for solving the above-mentioned problems include: a first drive means for moving the pair of presser members together; a second driving means for moving at least one of them to change the distance therebetween; and a second driving means for moving at least one of them to change the distance between the two; and a second driving means for moving at least one of them, and a second driving means for moving the cloth presser members to move close to each other at the start of operation of the button sewing machine to process the cloth while each holding the workpiece cloth. and a control means for controlling the second driving means so as to loosen the cloth and tension the work cloth apart from each other after the operation of the button sewing machine is completed.

(Function) When the button sewing machine starts operating, both the presser members approach each other while holding the workpiece cloth, and the tensioned workpiece cloth is loosened.
There is no risk of misalignment at the sewing location due to the sewing operation of the button sewing machine, and after the button sewing machine has finished operating, both presser members are separated while holding the work cloth, and the work cloth is The tension allows the fabric transport means to accurately feed the work fabric over a distance corresponding to the button spacing.

(Example) Next, an example in which this invention is embodied in a button-attached indexer will be described based on the drawings.

As shown in FIG. 1, a work table 2 extending left and right and a machine table 3 located behind the machine frame 1 are fixed to the upper surface of the machine frame 1, and a button sewing machine 4 is fixed to the upper surface of the machine table 3. is installed. An arm portion 5 of the button sewing machine 4 extends forward, and a needle 6 is supported at its tip so as to be movable up and down. Also, above the bed surface 7 of the button sewing machine 4, which is located on the same plane as the top surface of the work table 2, a pair of button clamping arms 8, which also serve as presser feet, are positioned below the needle 6 to open and close, move up and down, and move back and forth. It is attached so that it can be moved left and right. The button sewing machine 4 works together with the needle 6 and the button holding arm 8 to attach the button B to the workpiece cloth W in each sewing cycle.
It is designed so that it can be sewn at the upper sewing point P.

A button supply device 10 is installed on the upper surface of the machine table 3 at a position adjacent to the right side of the button sewing machine 4, and a supply arm 13 is rotatably supported on the button sewing machine 4 side. or,
A button hopper 12 is disposed on the upper surface of the machine table 3 adjacent to the button supply device 10, and a button hopper 12 is connected to the button supply device 1 through a flexible pipe 11.
Connected to 0. And button hopper 1
Button B sent out from button 2 is button feeding device 1
The buttons are supplied one by one to the button holding arm 8 of the button sewing machine 4 via the supply arm 13 of the button sewing machine 4. Note that reference numeral 14 denotes a regulating piece erected on the rear edge of the work table 2, which regulates and guides the rear edge of the work cloth W. Further, 15 is an operation panel.

A cloth transfer device 27 of this embodiment is arranged on the rear side of the work table 2 at the left and right positions sandwiching the button sewing machine 4, and a front end cloth presser member 16 located on the left side of the button sewing machine 4; Rear end presser member 17 located on the right side of the button sewing machine 4
It is composed of. The front end presser member 16 is supported so as to be movable left and right by a rail member (not shown) provided within the machine frame 1, and the left end of a rack 18 extending left and right within the machine frame 1 is fixed to a part of the rail member. This rack 18 is supported so as to be movable in the longitudinal direction relative to the machine frame 1, and a pinion 20 of a first pulse motor 19 fixed to the machine frame 1 is meshed with a part of the rack 18. As the first pulse motor 19 rotates forward and backward, the front end presser member 16 is reciprocated left and right together with the rack 18.

The front end presser member 16 has a front end clamp 22 that is rotated up and down by a first clamp cylinder 21, and is movable into a groove 23 provided transparently in the left side of the work table 2 so as to extend from side to side. The lower clamp piece 24 is fitted, and the front end portion of the work cloth W can be held and released by the front end clamp 22 and the lower clamp piece 24. Further, the front end presser member 16 is moved up and down by a front end stopper 26 by a stopper cylinder 25.
When setting the work cloth W, the front end edge of the work cloth W is positioned by the front end stopper 26 lowered onto the lower clamp piece 24.

On the other hand, the rear end presser member 17 is constructed as follows. Work table 2 and machine table 3
A board 75 is loosely inserted so as to extend vertically into a gap (not shown) provided to extend left and right between the board 75 and the board 75, and its lower end is movably supported by the rail member that guides the front end presser member 17. has been done. As shown in FIG. 2, the lower end of this base plate 75 has a pinion 29 therein which engages with the rack 18.
A gear box 77 is fixed to which a plurality of gears 76 including a plurality of gears 76 are fixed, and a second pulse motor 30 is attached to the lower surface thereof, and a drive gear 78 on the output shaft of the second pulse motor 30 and the plurality of gears 76 are fixed. The pinion 29 is rotated at a reduced speed via the . In the figure, 79 is a gear box 77 for slidingly guiding the movement of the gear box with respect to the rack 18.
It is a guide piece fixed to.

A second clamp cylinder 31 is installed on the upper surface of the bent portion of the upper end of the base plate 75, and its piston rod 8
0 is engaged from above with a rear end clamp 32 extending back and forth. The rear end clamp 32 is rotatably supported by a support piece 81 whose rear end is pivoted to the base plate 75 via a pin 82, and is always urged to rotate in the direction of engagement with the piston rod 80 by a spring 83. As the piston rod 80 moves in and out, it is rotated up and down between the solid line position and the chain line position in FIG. Further, as shown in FIG. 1, a part of the substrate 75 is fitted into a slit 33 that is transparently provided so as to extend from side to side on the right side of the work table 2, and is provided along the upper surface of the work table 2. A lower clamp plate 34 is provided which is bent rearward, and the rear end portion of the work cloth W is held and released by cooperation between the lower clamp plate 34 and the rear end clamp 32.

When the second pulse motor 30 is stopped, the rear end presser member 17 is held on the rack 18 by the engagement between the pinion 29 and the rack 18, and when the first pulse motor 19 is started in this state, the rear end presser member 17 is held on the rack 18. 18, the rear end presser member 17 is moved together with the front end presser member 16, and the workpiece cloth W is moved.
Each of the upper sewing locations P is sequentially transferred to the needle drop point of the button sewing machine 4. Further, when the second pulse motor 30 is started while the first pulse motor 19 is stopped, only the rear end presser member 17 is moved along the rack 18.

On the other hand, the button sewing machine 4 and the front end presser member 1
A first origin switch 58, which is input by engaging and disengaging with a part of the front end presser member 16, is mounted and fixed in the machine frame 1 between the
Based on the signal, the driving of the first pulse motor 19 is stopped and the origin position of the front end presser member 16 is determined. Note that the distance from the needle drop point of the button sewing machine 4 to this origin position is the distance from the front end presser foot member 1.
The front end presser member 16 is set to a minimum allowable dimension so as not to collide with the button sewing machine 4 when the button 6 is engaged with the first origin switch 58. Further, a second origin switch 59 is fixed in the machine frame 1 between the button sewing machine 4 and the rear end presser foot 17, and is turned on and off by contact with the rear end presser foot member 17. Based on the ON signal, the driving of the second pulse motor 30 is stopped and the rear end presser member 1 is stopped.
The origin position of No. 7 is determined. The distance from the needle drop point to this origin position is set to a minimum allowable dimension that prevents the rear end presser member 17 from colliding with the button sewing machine 4.

A carry-out device 44 for carrying out the work cloth W transferred from the cloth transfer device 27 is installed on the upper surface of the left side of the work table 2. This unloading device 4
4, a support piece 36 is erected and fixed at the rear of the left end surface of the work table 2, and a motor mounting plate 38 is rotatably supported at its upper end by a support shaft 37. A carry-out motor 39 is installed on the upper surface of the motor mounting plate 38, and a drive pulley 42 is fixed on the motor shaft. or,
A cover 40 extending toward the button sewing machine 4 is fixed to the motor mounting plate 38, and a driven pulley 41 is rotatably supported within the right end of the cover 40. A delivery belt 43 is hung between the driven pulley 41 and the drive pulley 42.

A push-up cylinder 45 is installed on the upper surface of the work table 2 below the motor mounting plate 38.
The upper end of the piston rod 46 is connected to the motor mounting plate 38.
It is in contact with the lower side of. When the work cloth W is transferred by the front and rear end cloth presser members 16 and 17, the carry-out motor 39 is stopped, and the piston rod 46 of the push-up cylinder 45 is
is projected, the motor mounting plate 38 is rotated upward, and the carry-out belt 43 is separated from the upper surface of the work table 2. Further, when the transfer operation of the front and rear end cloth presser members 16, 17 is completed, and the button sewing machine 4 finishes buttoning the final sewing location P of the work cloth W, the piston rod 4 of the push-up cylinder 45
6 is retracted and the lower part of the carry-out belt 43 is lowered onto the workpiece cloth W. In this state, the carry-out motor 39 is started and the workpiece cloth W is moved from the work table 2 as the carry-out belt 43 rotates. It is carried outside.

On the left side of the machine frame 1 and below the work table 2, a loading device 48 for loading the work cloth W carried out from the carrying out device 44 is installed. A first support rod 51 and a second support rod 52 are rotatably supported on the top surface of the tip of the support plate 49, which is provided to protrude leftward from the lower end of the machine frame 1, via a shaft 50. has been done. A plate-shaped mounting table 53 that extends horizontally toward the front is attached and fixed to the upper end of the first support rod 51, and the second support rod 52
A presser bar 54 is fixed to the upper end of the mounting table 53 and extends parallel to the mounting table 53 at substantially the same height.

A mounting table operating cylinder 55 is interposed between the first support rod 51 and the machine frame 1, and the driving of the cylinder 55 causes the mounting table 53 to be moved by the weight of the work cloth W carried out from the carrying out device 44. It is swung left and right between two positions across the moving path. Further, a presser rod operating cylinder 56 is provided between the second support rod 52 and the machine frame 1.
is interposed therebetween, and by driving the cylinder 56, the presser bar 54 is swung left and right between a position where it contacts the left side surface of the mounting table 53 and a position where it is separated from the position. Then, when the work cloth W is hung down for a predetermined length, the presser rod 54 presses the work cloth W against the mounting table 53 to set the bending position, and in this state, the presser rod 54 presses the work cloth W against the mounting table 53.
4 are swung together, the unloading device 44
The work cloths W released from the work cloths W are folded in half and stacked on the mounting table 53.

Next, to explain the main part of the electric circuit based on FIG. 3, the CPU 61 has the operation panel 15
, a RAM 62 that rewritably stores sewing data such as the number of buttons and button spacing input by operating each switch on the same panel 15, and a RAM 62 that stores in advance the program for the entire device and sewing data for standard type work cloth. It is connected to ROM63.

In addition, the CPU 61 has an input interface 64.
via the first and second origin switches 58,
59, start switch 65, front end presser member 1
Clamp switch 6 for setting the first clamp cylinder 21 of No. 6 and the second clamp cylinder 31 of the rear end presser member 17 into an operable state.
6, and a sewing end switch 67 for detecting the completion of one sewing cycle of the button sewing machine 4.

Further, a drive circuit 69 is connected to the CPU 61 via an output interface 68, and this drive circuit 69 is connected to the first pulse motor 1.
9. A second pulse motor 30, a sewing machine starting valve 70 for controlling the starting and stopping of the main shaft of the button sewing machine 4, and a sewing machine starting valve 70 for controlling the operation of the first and second clamp cylinders 21 and 31. The clamp cylinder control valves 71 are respectively driven.

Next, the operation of the button indexer having the above configuration will be explained mainly based on a program that is executed under the control of the CPU 61 shown in FIG.

Now, as shown in FIG. 1, the left edge of the workpiece cloth W is placed against the front end stopper 26 of the front-end cloth presser member 16, and the workpiece cloth W is placed on the work table 2 with the rear side edge aligned with the regulating piece 14. When the power is turned on in step S1 shown in FIG. 5 and the ON operation of the clamp switch 66 is confirmed in step S2 in the state set on the upper surface, the first part of the front end presser member 16 is turned on in step S3. The clamp cylinder 21 and the second clamp cylinder 31 of the rear end presser member 17 are each turned ON, and both front and rear ends of the work cloth W are held on the work table 2 by the front end clamp 22 and the rear end clamp 32. .

Next, when the ON operation of the start switch 65 is confirmed in step S4, the button sewing machine 4 is started in step S5, and the button holding arm 8 of the sewing machine 4 is lowered to the upper surface of the bed section 7 and the workpiece cloth W is started. Hold the presser foot. And step S
A timer (not shown) is activated in Step 6, and after the time required for the lowering operation of the button holding arm 8 has elapsed, the second pulse motor 30 of the rear end presser member 17 is activated with a predetermined number of pulses in Step S7. Ru. Then, the rear end presser member 17 is moved to the left on the rack 18 by a predetermined distance while holding the rear end of the work cloth W, and the work cloth W is loosened by an amount corresponding to the moving distance. Therefore, in this state, even if the button sewing machine applies feed in the left-right or front-back direction to the workpiece cloth W during the sewing operation, the amount of feed is absorbed by the slack, so that the workpiece cloth W There is no fear that tensile force will be applied to the holding portion of the clamp, and displacement from the front end clamp 22 or the rear end clamp 32 is prevented.

Subsequently, in step S8, the driving of the button sewing machine 4 is stopped, and when it is confirmed by the sewing end switch 67 in step S9 that the one button sewing operation has been completed, in step S10, the second pulse motor 30 is turned on. The rear end presser member 1 is driven in the opposite direction with the same number of pulses as during the loosening operation.
7 is returned to the cloth holding position described above. Next, in step S11, it is determined whether or not the final button B has been sewn to the sewing location P at the rear end of the work cloth W.
If it is not the last button, the process advances to step S12, where the first pulse motor 19 is driven with the number of pulses corresponding to the button interval based on the sewing data stored in the RAM 62 or ROM 63, and as the rack 18 moves leftward, the first pulse motor 19 is driven. Both presser members 16 and 17 are moved together by a distance equal to the button spacing, and the next sewing location P is transferred to the needle drop point of the button sewing machine 4.

Then, when the operations from step S5 to step S11 are sequentially repeated and buttons B are sewn to all the sewing locations P on the work cloth W, the determination result at step S11 becomes YES, and step S1
Proceed to step 3, first and second clamp cylinders 21, 3
1 is turned OFF, and both clamps 22,
32 releases the work cloth W. Then step S
In step S14, the carrying out device 44 and the loading device 48 are operated, and the work cloth W after button attachment is carried out from the work table 2 and stacked on the mounting table 53, and in step S15, both the cloth pressing members 16, 17 is returned to the initial position, and the button attaching work on the first processed cloth W is completed.

Note that this invention is not limited to the configuration of the embodiment described above, and for example, the front end presser member 1
6 on the rack 18, and the front end presser member 16 is made to perform the above-described cloth loosening operation. The clamp cylinder 31 and the rear end clamp 32 are supported so as to be movable from side to side, and a cylinder for applying a moving force to them is provided separately, thereby imparting a predetermined amount of loosening to the work cloth W. It is also possible to change the structure of each part arbitrarily and embody it without departing from the spirit of this invention.

Effects of the invention As detailed above, this invention includes a first driving means for integrally moving a pair of presser members;
A second member for moving at least one of the pair of presser members to change the distance between the two.
With the driving means and both presser members holding the work cloth, they approach each other to loosen the work cloth when the button sewing machine starts operating, and move away from each other to release the work cloth after the button sewing machine finishes operating. and a control means for controlling the second drive means so as to tighten the button, so there is no fear that the holding position of the workpiece cloth will shift due to the sewing operation of the button sewing machine, and the button can be sewn at an accurate sewing position. This provides an excellent effect in that buttons can be attached at intervals.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a button indexer showing an embodiment of this invention, Fig. 2 is a sectional view showing the support structure of the rear end presser member, and Fig. 3 shows the main part of the electric circuit. The block diagram and FIG. 4 are flowcharts. In the figure, 2 is a work table, 4 is a button sewing machine, 16 is a front end cloth presser member, 17 is a rear end cloth presser member, 19 is a first pulse motor as a first driving means, 27 is a cloth transfer device, 30 is a second pulse motor as a second driving means, 61 is a CPU as a control means, W is a work cloth, and P is a sewing location.

Claims (1)

[Scope of claim for utility model registration] A work table 2, a button sewing machine 4 installed on the top surface of the work table 2, and holding and releasing both front and rear ends of a work cloth W placed on the top surface of the work table 2, respectively. The button sewing machine 4 has a pair of presser members 16 and 17 that can be used, and by moving them along the upper surface of the work table 2, a plurality of sewing points P on the workpiece cloth W can be sewn.
a sewing device that attaches buttons to the sewing location P by alternately repeating sewing by the button sewing machine 4 and feeding the cloth by the cloth transferring device 27 a plurality of times. A first driving means 19 for moving the pair of presser members 16 and 17 together, and a distance between the two by moving at least one of the pair of presser members 16 and 17. When the button sewing machine 4 starts operating, the second driving means 30 and the second driving means 30 for pressing the button, and the second driving means 30 for loosening the work cloth W while holding the work cloth W, respectively, press the button. After the operation of the sewing machine 4 is completed, the second driving means 30 separates from each other and tensions the work cloth W.
A sewing device characterized in that it comprises a control means 61 for controlling.