JPS63194696A - Automatic stitch apparatus of 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) The present invention relates to an automatic sewing device that automatically controls a plurality of sewing machines, and is used for sewing apparel products with complex patterns such as automobile seats. It is used for sewing.

(Prior Art) As a prior art related to the present invention, there have been used machines such as multi-needle quilts and single-needle quilts that sew apparel products by fixing the sewing machine head and automatically feeding cloth.

(Problems to be Solved by the Invention) When sewing with the multi-needle quilt, it is possible to move the cloth to be sewn forward or to feed it in a perpendicular direction, and therefore the sewing pattern shown in FIG. 2 is possible. , Figure 1 (a) and (mouth)
As shown in Figure 2, it is impossible to create a pattern with symmetrical stitches and curves. Also, with a single quilt sewing machine, the sewing machine is fixed and the fabric is restricted in the X-Y direction to hang the sewing pattern, so when making several vertical stitches, it is not possible to sew one row at a time. There is a problem that the rise is distorted.

The technical object of the present invention is to provide an automatic sewing device for a sewing machine that can automatically sew a symmetrical complex pattern used for sewing automobile seats.

[Structure of the invention]

(Means for solving the problem) Two small lockstitch sewing machines are placed facing each other on a base, and the sewing machines have a self-propelled feed mechanism consisting of a rack and pinion for forward movement and a self-propelled feed mechanism for backward movement. The sewing machine has a quick return mechanism consisting of an air cylinder, and two slide shafts are provided at the bottom of the sewing machine to enable the sewing machine to move in the X-Y axis directions. It has a holding mechanism for holding the frame plate, and has a pattern mechanism consisting of a plurality of grooves on the base below the frame plate, and the movement guide piece of the sewing machine slides in the groove of the pattern mechanism to move the sewing machine. can move forward and backward, left and right,
This is an automatic car seat sewing device that can sew a left-right symmetrical pattern on cloth temporarily held by a frame.

(effect) The technical means works as follows.

A fabric temporarily held in a frame is placed on the throat plate of the sewing machine, and is sewn with the upper and lower threads by the rotation of the sewing machine motor, and the rotation of the sewing machine is caused by a pinion that moves intermittently through the operation of a link and a one-way clutch. The sewing machine moves forward with the rack, and the sewing machine movement guide piece provided at the bottom of the sewing machine slides in the pattern groove on the base, so that the sewing machine moves in the X-Y direction.
It moves in the axial direction and forms a pattern on the cloth.

In addition, after sewing is completed, it can be quickly returned to a certain position by the action of an air cylinder, and the pattern groove switching mechanism can automatically change the pattern, automatically sewing symmetrical stitches on the fabric. It can be formed into

(Example) Specific examples will be described below.

In FIGS. 3 to 7, A is an automatic car seat sewing device, 1 is a sewing base, and 2 is a small lockstitch sewing machine.

10 is a self-propelled feed mechanism of the sewing machine, 20 is an X-Y axis slide mechanism having a quick return mechanism, 30 is a pattern mechanism having a pattern plate, 50 is a holding mechanism that holds the fabric and frame to be sewn,
61 is an air source for each cylinder.

(a) Small lockstitch sewing machine The opposing small linear lockstitch sewing machine 2 is a known balance.

Needle bar, hook, presser foot and sewing machine motor 3. There is an automatic thread cutting device 6 that cuts the fabric with a hot wire from above and below using a throat plate 4 without a feed groove and an air cylinder 5, and each of the above components is attached to a block 7, which will be described later below the slide shaft of the sewing machine body. There is a movement guide piece 8 that slides in the pattern groove.

(b) The self-propelled feed mechanism 11 is a rack installed outside the sewing machine in parallel with the sewing machine, 12 is a pinion, 13 is a one-way clutch 914
15 is a link, and 15 is a transmission mechanism of the motor. Rack 11
is moved up and down by the action of an air cylinder 16, and the rotation of the motor 3 is intermittently oscillated by the transmission mechanism 15 and one-way clutch 13 to rotate the pinion 12, and the sewing machine body moves forward. The forward movement of the sewing machine stops while the sewing machine needle is inserted into the fabric, and when the needle is above the fabric, the pinion 12 rotates and moves forward. Since the two sewing machines are connected by a connecting rod 17, both machines The same movement is performed, and the lateral movement of the sewing machine is caused by the sliding of the spline shaft 18 on the axis of the pinion 12.

Note that both end surfaces of the pinion 12 have flange portions that are slightly larger than the width of the rack 11, so that the pinion 12 will not be buzzed by the rack 11.

(c) X-Y direction slide shaft and quick return mechanism sewing machine base 1
Slide shaft 21 for moving the sewing machine in the Y-axis direction.
22 is provided, and an X
By arranging the shafts 24 and 25 and placing the sewing machine 2 thereon, the sewing machine can freely move in the X-axis and Y-axis directions.

In addition, the two Y-direction slide shafts 21.2 arranged in parallel
An air cylinder 26 for a single sewing machine is provided in the center of 2, and the piston of the cylinder 26 moves the Y-axis moving plate 23.
By pressing , the sewing machine returns quickly. In this case, the rack 11 is lowered by the action of the cylinder 16.

(d) Pattern mechanism The pattern board 30 has a pattern groove 31, and in the case of this embodiment, as shown in FIG.
In Figure 5, one zero series 31. Groove 3 that curves inward continuously
2.33 is provided and the cylinder 35. Lateral movement axis 36
．． Switching groove plate 37.38. A pattern switching mechanism 34 consisting of a bin 39 is used to slide a sewing machine guide piece 8 provided at the bottom of the sewing machine.

That is, in Fig. 5, the sewing machine moves forward while sewing the cloth, slides through the groove 31, passes through the groove 40 formed by the switching groove plates 37 and 38, moves to the end of the groove 32, and sews a single line. After completion, the thread is cut into a long length by the automatic thread cutting device 6 using a hot wire, the end of the thread is held, and the sewing machine returns to the branching point 41 of the groove by the action of the quick return mechanism, and the action of the pattern switching device 34. After the switching groove plates 38 and 39 move in the direction of the arrow 42 around the bin 39, the sewing machine moves forward again through the grooves 31-40-33 while sewing the cloth, thereby forming a curved second grain seam. It is something that

(e) Cloth Holding Mechanism In the cloth holding mechanism 50 shown in FIG. 6, 51 is a frame plate, the position of which is adjusted and fixed by pillars 52 and 53 provided on the base, on which the cloth is placed, and 54 is a frame plate. A presser foot 5 integrated with a clamp cylinder 55 that presses the upper part of the cloth with a through hole corresponding to the pattern groove.
6, a clamp cylinder 57 for pressing the other, and an integral presser foot 58, and a cloth positioning bin 59 is provided on the frame plate.

In the above configuration, the operation of the sewing machine and the interaction with each cylinder will be explained with reference to FIG. Attach a cloth to the cylinder 55.5, insert the positioning hole on the back side of the urethane into the bottle 59, position the cloth, and press the cylinder 55.5.
7. Press the cloth.

(b) During the forward movement of the sewing machine, the rack 11 rises due to the action of the cylinder 16 and engages with the pinion 12, and as the sewing machine motor rotates, the two sewing machines slide through the groove while sewing the sheet to make one stitch. Complete the eyes.

(c) In the thread holding and thread cutting process, when the sewing machine completes one stitch and stops, the cylinder 5 attached to the sewing machine scoops and holds the ends of the upper thread and lower thread, and after thread cutting, the ends of the thread hold part.

(d) During the quick return process of the sewing machine, the rack 11 is lowered by the cylinder 16, and the cylinder 26 is operated so that the sewing machine quickly stops on the slide shaft 21, 22 at the branch point 41 of the return pattern groove.

(e) In the pattern groove switching step, the switching groove plate moves laterally due to the action of the cylinder 35, the rack rises, and the sewing machine moves forward again to complete the stitching of the second grain.

(f) All the sewing of the fabric is completed, the thread is cut, the end of the thread is held, and the sewing machine body quickly returns to the sewing machine's original position by the quick return mechanism.

One cycle of sewing is completed through each of the above steps, and a new sheet is replaced and sewing is performed.

〔Effect of the invention〕

The present invention has the following effects. In other words, by preparing several frame plates and temporarily attaching cloth to the frames in advance, the operator can simply attach or remove the frame plates to the holding mechanism, and everything else can operate automatically. By switching the pattern device, it is possible to sew an automobile seat with a novel seam pattern of not only two lines but also three lines and symmetrical curves.

[Brief explanation of the drawing]

(A) and (B) in Fig. 1 are the stitch patterns according to this embodiment;
Fig. 2 is a stitch pattern according to a conventional example, Fig. 3 is an external perspective view of the entire embodiment, Fig. 4 is an explanatory external view of the sewing machine with one section omitted, and Fig. 5 is an explanatory view of the pattern switching mechanism. Fig. 6 is an explanatory diagram of the frame plate holding mechanism, and Fig. 7 is an explanatory diagram of the operation of the cylinder in each process of this embodiment, where (a) is the presser step, (b) is the rack raising process, and (c) is the work of the cylinder. is the thread holding process, (d) is the intermediate positioning process, (e) is the pattern groove switching process, (f)
indicates a fast return process. 1... Base, 2... Small lockstitch sewing machine 910... Self-propelled mechanism, 11... Rack. 12... Pinion, 20... Quick return mechanism. 21.22...Y direction slide axis. 24.25...X direction slide axis. 30...Pattern switching mechanism. 50...cloth holding mechanism

Claims (1)

[Claims] A plurality of small lockstitch sewing machines are placed opposite each other on a base, and the sewing machine has a self-propelled mechanism consisting of a rack and pinion for forward movement and a quick return mechanism consisting of an air cylinder for backward movement. A slide shaft that allows the sewing machine to move in the X-Y axis direction is arranged, and a holding mechanism that holds the cloth to be sewn is provided in the center of the opposing sewing machine, and a pattern consisting of a plurality of grooves is formed on the base. The automatic sewing machine is equipped with a mechanism, and the movement guide piece of the sewing machine slides in the groove of the pattern mechanism, so that the sewing machine can move back and forth, left and right, and can sew a left-right symmetrical pattern on the held cloth.