JPS6187582A - Workpiece guide device in sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to a support surface for a workpiece to be sewn in a sewing machine.

(Prior art) Conventionally, when two pieces of processed fabric or one piece of fabric are sewn into a bag shape, and then the front and back sides are reversed and decorative stitches are applied to cuffs that have been sewn with so-called ground stitching, the seventh stitch is used. In the unprocessed cufflink case shown in the figure, the unprocessed cufflinks are stored in a stacked state on a support stand having an outer diameter smaller than the unprocessed cufflinks, and the uppermost unprocessed cufflink is gripped by a gripping device. After that, the sewing machine moves to the sewing machine, and one edge of the sewing machine comes into contact with a guide member extending in the direction of feed of the workpiece.
! (L), presser foot to support surface-1 of the object to be NrJA.
There is a device in which the workpiece is fed by the cooperation of a feed dog and a gripping device that is moved in the workpiece feed direction in synchronization with the feed dog B.

(Problems that the invention solves and improves) However, when raw cuffs are stacked on the support base -1-1-11, as shown in Figure 7 IJ'? j'J, sea urchin unika 7 [
Since a folded part and a seam are formed on the circumferential edge of the cuff, the outer circumferential edge of the cuff is in a drooping state. Therefore, when the lower one of the raw cuffs in the laminated state is gripped by the grippers H, a relative shift between the two cuffs is likely to occur.

Due to the existence of this deviation, the above-mentioned classification 1. f
When the unprocessed cufflinks are transported to the sewing position at the sewing machine,
There is a platform in which the side edge of the cufflink is not accurately brought into contact with the cloth guide member extending in the cloth feeding direction near the feeding dog. This causes a problem in that the seam allowance meets the raw cuff corner. Furthermore, in this conventional Rie, if the feed speed by the feed dog of the sewing machine and the moving speed of the gripping device are even slightly different, the gripping force of the gripping device is set to be weak so as not to damage the sewing machine. ,
There was a risk that the cufflinks would come off from the gripping device while the cufflinks were being transferred.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes a button that is moved up and down across the support surface of the workpiece, and is capable of forming stitches on the workpiece. A transfer device including a feed dog for moving the workpiece toward the button drop point and a feed dog protruding from one side of the workpiece support face a guide member extending along the direction of feed of the workpiece; a gripping device that holds the workpieces stored in a predetermined position one by one and then releases the workpieces after sewing is completed;
a moving device for moving the device in the X and Y directions; The sewing machine is provided with a control means (4) for controlling the moving device so as to move in synchronization with the movement of the feed dog in the feed direction of the workpiece.

(Takeda) Configuration 1 of article i J: In Riko's invention, the gripping device presses one edge of the gripped workpiece against the guide portion (A) to give slack to the workpiece, and then the gripping device moves to the feed dog. The motion of (
3. Because of 3.A, the workpiece is not accurately transported along the guide member regardless of the gripping state of A, and the seam allowance is always constant. kept 4
do.

(Embodiment) This invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a lockstitch sewing machine 2 equipped with an arm portion 2a and a bed portion 2h is disposed on the right side of the workbench 1.
1 is placed on the same plane as the ``-'' surface of the x stand 1 to form a cloth support.
A needle bar 4 having a needle bar 4 is supported so as to be movable up and down. In addition, in the bed part 2h, there are J and Rimoto N in cooperation with the above-mentioned ♀I3.
A yarn transport catcher (not shown) for forming an Eir is provided.

-5= A nail plate 5 having a nail hole 5a and a tooth gap 1-151) is attached to the bed portion 2b, I-, and a sliding plate 6 is attached to the nail plate 19. A feed dog 7 is disposed in the bed portion 2b below the #1 plate 1), and extends 11 times over the r1 plate 5 via the feed dog gap []5b. ”
, is becoming a sea urchin.

On the right side of the feed dog opening 51) is the C bed portion 2b.
A guide member F3 having a rectangular bar shape and extending along the direction in which the sewing material is fed is mounted on the workbench 1. An air cylinder 9 is attached to the bracket 9 so as to cross above the guide member 8. An air cylinder 10 is installed upright on the bracket 9. A presser foot 1 is attached to the lower end of the piston of the cylinder 10.
1 is fixed. Incidentally, this presser foot 11 and the feed dog 7 constitute a transfer device. and,
As shown in FIG. 2, the feed dog 7 is synchronized with the vertical movement of the needle 3 when the presser foot 11 presses the unprocessed cuff C as a workpiece toward the bed portion 2b-1. When the unprocessed cuff C is operated, the guide member 8
niji-) (The sewing material is transported in the direction of feed.)

As shown in FIG.
ii! f 121 - Yh direction drive ■ Moving table 14, which is moved in the Y direction in Fig. 1 based on the rotation of the knee 913. 15
The moving platform 1 is moved in the direction of ×BJ in the same figure based on the drive O+ of
6d l) mouth ゛) configuration (N1'+7).

A first support bracket 20 is attached to the right end of this transfer unit 1G.
is attached, and the first support brackets 1 to 204.11.
The motor 12 is moved up and down with the rotation of the drive motor 21.
Both 1S11 and 1S11 are installed. As shown in FIG. 4, the second support 1. 'I Plano 7 to 1 to 22 has spline shaft 23 1-lower! f) A drive motor 24 of Iζ for rotationally driving the twin shaft 23 is attached to each of the supports 1 to 1 which are inserted so as to be rotatable and rotatable.

A drive pulley 25 is attached to the 1-1 axis of the 24 to provide 19× movement inside the second support bracket 22 ().
At 6, a driven pulley 26 is inserted into the spline shaft 23, which can rotate integrally with the spline shaft 23 and move relative to the other spline shaft 23, and a timing belt 27 is inserted between the pulleys 25 and 26. It is hung. and,
As the drive motor 24 rotates, the drive pulley 25. The spline shaft 23 is rotationally driven via the timing pels 1 to 27 and the driven pulley 26.

A gripping device 30 is attached to the F end of the spline shaft 23 by a support body 28 and a support arm 29.

Further, as shown in FIGS. 4 and 5, the -[a cylinder 31 is attached to the side surface of the second holding bracket l~22 by the mounting plate 32, and the piston 33 of the T a cylinder 31 A lower end portion of the spline shaft 23 is connected to the lower end portion of the spline shaft 23 by a connecting piece 34 .

Based on the operation of the air cylinder 31, the gripping device ζ30 is moved to the upper position shown by the solid line in FIG. 4 and to the upper position shown by the chain line in the same figure. 1] It is moved up and down between the lower position.

Fig. 6 B shows J, the gripping device 300 body 35
111! ; Nipo γ', i>1" It is formed in the shape of 1", and a flange part 35a is formed at the -1 part, and a hole 36 is formed in the center that extends 1 inch vertically. In this support hole 36, a pair of upper and lower movable bodies 37. Extending radially diagonally downward, ?t7 number 1139 can be moved.
As the movable body 38 moves downward, the tip of each needle 39 can protrude diagonally downward from the direction of the main body 35.

On the outer periphery of the main body 35) there is a first adjustment ring 110° and a second
An adjustment ring 41 and a fixing ring /1.2 are each rotatably screwed into the first adjustment ring 40, and a first adjustment ring 40 that passes through the main body 35 and is located below the first transfer body 37 is provided inside the first adjustment ring 40.
The stopper 43 is fixed, and the second adjustment ring 4
A 2-9th stopper 44 is provided on the inner periphery of the main body 35 and located below the second movable body 38. Then, each stopper 43.
The arrangement position of the movable body 44 can be changed, and the downward movement position of each of the movable bodies 37 and 38 is regulated and controlled by the respective stoppers 43 and 44.

A buffer body 45 having a top shape 4r is supported at the center of the main body 35 so as to be movable downward by a screw /I6, and is urged to move downward by a pair of springs 47. . Then, grip 1'+ device 30 is unprocessed cuff C
The shock applied to the gripping device 30 can be absorbed by the shock absorbing body 45 when the gripping device 30 is arranged at the same time. The main body 35 has a support hole 36 on one side of the first moving body 37 ii! ! between the first air supply passage 48 and the first and second transfer bodies 37 and 38 (the second air supply passage 49 connected to the support hole 36 and the lower part of the second transfer body 38). A third air supply passage 50, etc., which are connected to the support hole 36, are formed in each of the movable bodies 37.
38 is shown in FIG.
Each movable body 37, 38 is moved downward by 1-A which is fed into the support hole 3G via 9. And, due to the movement, each company 39 is exposed to the tree (the lower surface J of 4V35, descending, and each 1139 is unadded T h Fus C
You can hold the car by lightly stabbing it. ! , -LP is supplied to the third air supply passage 50 while the cuff C is held at 1.
As the bodies 37 and 38 are transferred, each month 39 is immersed and moved into the spring (Figure H/J) based on 1vI force! , - Me, the cuff C easily comes off from the main body 35, as shown in Figures 1 and 7. A case 51 that stores raw cufflinks O and is formed into a box shape such that τ+R< /j is supported on the stand 1.
A through hole]) 18 is formed at the bottom of 1. Case 5
An air cylinder 52 is arranged below the case 51.
At the upper end of the piston 53 of the one-horn cylinder 52, there is installed a support base 54 having a smaller outer diameter than the raw cuff C. And this support stand 5
4, raw cufflinks C are supported in the v4 position.

In addition, this non-71n T cufflink C is made of two pieces of cloth or one
Since the sheets of cloth are sewn to form a bag shape and then turned upside down, when stacked on the support base 54, the cuffs C are formed at the peripheral edge of each unpressurized cuff C. Due to the presence of the folded part (seamed part), the peripheral edge of the lower part becomes sagging, and
For those located above, -C has a slightly raised peripheral edge.

Further, a detector consisting of a light emitting element 55 and a light receiving element 56 facing each other is provided on each workbench at the periphery of the case 510 in order to detect the uppermost unprocessed cuff C.

Next, an electrical block diagram of the moving device 12 in this embodiment will be explained according to FIG. 8. In the figure, reference numeral 64 denotes a central processing unit (CPU) including a control means 63, and the CP LJ 64 includes a read-only program (B+, which indicates 1 gram) for controlling the operation of the entire moving device 12. Memory (OM in F) 6Fi is connected, and each drive motor 13,1! 'i.

21.2'l, indicates the operating status of the sewing machine 1-66, each air cylinder 10.31.52 and the gripping IFi device 30. It is connected. In Part 1,
A start switch 68 arranged at a predetermined position on the workbench 1
When a predetermined signal is input to CP jl 6 /I from the F switch 1 to the knob switch 69 (shown only in FIG. 8), CP t, l 64 transmits each signal to each of the drive motors, etc. An Ill+ control signal is output via a drive circuit (not shown). Based on this control signal, the moving device 12 is actuated by each drive motor to move the gripping device 30 in the X and Yb directions, and the gripping device 30 is not activated and the
Rpi [Grasp and release of cuff C is performed.

Further, with the unprocessed cufflinks C being gripped, the moving device 12
The grip S+i'R30 is moved to the sewing position 1,
: Rear (for J, G P LJ 64 is the gripping device 30
is intermittently moved in the same direction as the movement of the feed thread 7 in the direction 1111 L, - (h of feeding the material to be sewn).

Next, the operations of the moving device 12 and the lockstitch sewing machine 2 configured as described above will be explained mainly with reference to FIG. 9. In order to perform decorative stitching along the three predetermined edges of the unprocessed cufflinks C, when the start switch 68 is operated in step S1 in the figure and the power is turned on to the moving device 12 and the sewing machine 2, the step At S2, the CP LJ 64 drives the air cylinder 52 shown in FIG. 7 until the detection signal from the detector consisting of the light emitting/receiving elements 55 and 56 shown in FIG. It is placed on the same plane as the workbench 11 surface. Next, in step S3, the CPLJ 64 drives the X-direction drive motor 15 and the Y-direction drive motor 13 to move the gripping device 30 to the center position of the case 51 shown in FIG. Then, the gripping device 30 is placed at the solid line position in FIG. Thereafter, the air cylinder 31 is operated to place the gripping device 30 at the position shown in chain lines in the figure.

Next, in step S4, the CPU 6 /l passes through the first [a supply passage 48 or the second -r supply passage /l] as shown in FIG.
Outputs a control signal to supply IO-7.

, 91 in front of Shoutsu C1: 4 days in either air supply passage.

4 (J supplied air (Koyori internal production v1 body 37.31
"1 or (,1ゑ12 Only the moving body 38 is shown in Fig. 6 (
Brokerage/) l I and others were moved, and each 39
is protruded before Since the cuff 39 is diagonally protruded into the cuff C, the cuff C will fall during transportation etc. And, the moving body 3 on the side (3 only) (in the case of the rear right side, the protrusion amount of 1139 can be set to a greater extent, and the simultaneous operation of each adjustment ring /lO, /11 NiJ,
1) It is possible to adjust the amount of protrusion, and it is possible to grip the force C for picking up various types of inventory.

CP LJ 6 /I controls the moving device 12 at S5. - The stitching is transferred to the first position τ'.As a result, one edge of the raw cuff C is pressed against the side surface of the guide member 8, and the holding device 30 and the guide member 8 are pressed together. A slack as shown in FIG. 2 is formed in the unprocessed cuff C between the two.

Next, in step S6, the air cylinder 10 is activated to lower the presser foot 11, and the presser foot 11 presses the unprocessed cuff C toward the upper surface of the bed portion 2b.

Next, in step 7, the operation of the sewing machine is started, and a decorative stitch is formed along one edge of the raw cuff C by the stitch forming device including IJ 3 (-1:). The teeth 7 and the presser foot 11 cooperate to transport the raw cuff C backward along the guide member 8. Also, in step S8, the above-mentioned grip l? [By controlling the movement of the device 30 intermittently in the sewing material feeding direction in synchronization 1) with the feed dog 7,
The raw cufflinks C are transferred to the guide member 8.

In this embodiment, the presser foot 11 and the gripping device @
Since there is slack between 30 and 30, it is difficult to move the gripper @30.
1 speed and the feed speed of feed dog 7 were slightly different.
'), even if the gripping device 30 and the unprocessed cuff C are slightly deviated from the desired device, the unprocessed cuff 0 can be firmly transferred by holding the unprocessed cuff 0 to the guide member 8. This allows the seam allowance to be kept constant at all times.

After finishing the decorative stitching along the T4 edge of the cuff C, the supply of air to the presser foot air cylinder 10 is stopped in step S9, and the presser foot 11 is removed from the raw cuff C. As soon as the sewing machine is separated, the operation of the sewing machine is stopped. Next, the process proceeds to step S10, where it is determined whether the decorative stitches on each edge of the cuff C are finished or old.In this case, the result is NO, so
Proceeding to step S6, the P It 64 performs decorative stitching along the next edge.
, 15, and the gripping device 30 separates the cuff C from the arm portion 2a by 1! After that, the drive Tanabata 24 is driven to rotate the gripping device 30 (), and each drive motor 13, 1 is turned again.
Hold 5 with the drive lno! The cuff C is moved to the sewing position t'C together with the i device 30, and the edge portion to be sewn next is distributed along the guy-1 hood member 8. After that, steps S6 to 810 are repeated. In this way, when the decorative stitching is completed along the remaining two edges of the raw cuff C, the determination result in step SIO() becomes YES, and the process proceeds to the next step S12.

In this step S12, the CP stitch 641; L moving device 12 is controlled to move the cuff 0 after decorative stitching to the upper part of the finished product case 71, which has almost the same configuration as the case 51 shown in FIG. 1, and then In step S13, a control signal for supplying air to the third air supply passage 50 of the gripping device 30 is output, and each moving body 37° 38 is returned upward, and the 6 stitches 3
Remove item 9 from cuff C after decorative stitching. As a result, the cufflinks C after decorative stitching are placed into the finished product case 71.

Next, in step S14, it is determined whether or not the stop switch 69 has been operated, and the result is N.

If so, the operations from step S2 to step S13 are repeated. On the other hand, if the binding of the thread strip 81/I is YES, the sewing operation 1111 is completed.

ADVANTAGES OF THE INVENTION 1 - Detailed Description: J: This invention involves pressing one edge of a gripped object to be sewn against a mandrel member (J to be sewn; in a state where it is sagging, The gripping device moves in the direction of the workpiece feed in almost synchronization with the southward movement of the material to be sewn. Even if the relative position of the grip 1-1 device and the workpiece is slightly deviated from the desired position, the workpiece can be reliably transferred to the guide member with 14). 3゜ which plays the excellent 7j effect of being able to always keep the seam allowance of the workpiece constant.

[Brief explanation of drawings]

FIG. 1 is a plan view of a sewing machine, a moving VJ, and a stomach embodying the present invention, FIG. 2 is a partially enlarged front view, FIG. 3 is a block diagram, and FIG. 9 is a 70-chi 11-1~. In the figure, 3 is a needle, 7 is a feed dog, 8 is a guide member, 12
3 is a moving device, 30 is a gripping device, 63 is a control means, and 0 is a cuff link.

Claims (1)

[Claims] 1. A stitch forming device that includes a needle (3) that is moved up and down across the support surface of the workpiece and forms a stitch on the workpiece (C); ) for transporting the material toward the needle drop point; an extending guide member (8); and a gripping device (30) that grips the sewing objects (C) stored at a predetermined position one by one and then releases them after sewing is completed.
a moving device (12) that moves the gripping device (30) in the X and Y directions; and a moving device (12) that moves the gripping device (30) in the X and Y directions;
) so that the gripping device (30) moves in the direction of feeding the workpiece in substantially synchronization with the movement of the feed dog (7) while the workpiece (C) is pressed against the workpiece (C) with slack. A workpiece guide device for a sewing machine, comprising: a control means (63) for controlling the device (12).