JPS6334754B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic line drawing sewing device, and more specifically, to an automatic line drawing sewing device, which includes a motor driven by an output signal from a memory that stores coordinates in the X direction and the Y direction. The present invention relates to an automatic line drawing sewing device for positioning a sewing product.

In conventional devices of this type, the workpiece is held in a frame, and the frame is moved by a motor. Having to remove the sewing item from the frame and then attaching a new item to the frame was a real hassle.

The present invention has been made in view of the above circumstances, and consists of sandwiching cloth between a pair of cloth feed rollers attached to a shaft and a cloth loading plate, and moving the shaft with a first motor. The automatic line stitching device is configured so that the cloth follows the movement of the rollers by rotating and axially moving the cloth in a direction perpendicular to the cloth feeding direction.

Thus, according to the present invention, since there is no need to attach the cloth to the frame, not only can the above problems be solved, but also the size of the cloth and the line drawing can be set relatively freely. In addition, the load on the motor can be reduced, making it possible to downsize the motor and reduce power consumption.

Furthermore, since the machine frame that holds the rollers is mounted on the sewing machine head, other parts (for example, the fabric presser)
There are almost no restrictions or other problems compared to when it is mounted on a fabric holder (if it is mounted on a fabric holder, the reinforcement of the fabric holder itself and the structure of the surrounding parts become complicated, making it difficult to operate).

An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a bracket 12 is attached to the machine frame 11 of the automatic line drawing sewing device 10 with screws (not shown).
is fixed. After the bracket 12 is wound around the shaft 14 which is set up on the sewing machine table 13,
Both ends 12a and 12b are overlapped, and the bracket 12 and shaft 14 are fixed by tightening the ends 12a and 12b with mounting screws (not shown).

A first pulse motor 15 is attached to the longitudinal wall 11a of the machine frame 11, and the shaft 15
A extends into the machine frame 11 and has a pulley 16 attached thereto. On the longitudinal wall 11a of the machine frame 11,
A shaft 17 is installed and protrudes into the machine frame 11,
A pulley 18 is rotatably mounted on the shaft 17. A timing belt 19 is stretched between the pulley 16 and the pulley 18, and the timing belt 19 moves when the first pulse motor 15 is driven.

A moving body 20 is located below the timing belt 19.
is installed. That is, a groove 20b is formed in the top of the lower part 20a of the moving body 20, and the timing belt 19 is fitted into this groove 20b. By screwing the upper part 20c to the lower part 20a, the movable body 20 can move integrally with the timing belt 19 between the pulleys 16 and 18. Further, a protrusion 20d is formed on the lower part 20a, and this protrusion 20d is fitted into a groove 11c carved in the bottom wall 11b of the machine frame 11. When the moving body 20 moves together with the timing belt 19, the moving body 20 is prevented from shaking.

A drive shaft 21 passing through the side wall 11d of the machine frame 11
The center portion 21a has a spline shape, and the left end portion (not shown) and right end portion 21b have a round shaft shape. Therefore, the left end of the drive shaft 21 is connected to the moving body 2.
It is rotatably connected to the lower part 20a of 0. Further, a pulley 22 is provided at the center portion 21a of the drive shaft 21.
is fixed, and on both sides there are bearings 2
A spline bush 24 press-fitted into the inner ring of No. 3 is mounted (however, only one of the bearing and spline bush is shown). The bearing 23 is inserted into the holes 44c and 4 of the two limbs 44a and 44b of the support body 44.
4d, and the support body 44 is attached to the machine frame 1.
It is fixed to a protruding wall 11e that forms a step from the side wall 11d of 1.

A second pulse motor 25 is attached to the protruding wall 11e of the machine frame 11, and the shaft 25
After passing through the protruding wall 11e, the pulley 26 is attached. A timing belt 27 is stretched between the pulley 26 and the pulley 22, and when the second pulse motor 25 is driven, the shaft 21 is rotated via the timing belt 27. . The first pulse motor 15 and the second pulse motor 25 are driven in synchronization with the rotation of the sewing machine in accordance with position signals of X and Y coordinates stored in a memory (not shown).

A pair of cloth feed rollers 29 and 30 are attached to a screw 31 at a predetermined interval on the right end 21b of the shaft 21.
(only one is shown), and hard rubber is baked on the outer periphery of the rollers 29 and 30. Therefore, the right end 21b of the shaft 21 is connected to the needle bar 2.
8, and the needle bar 31 is positioned between a pair of cloth feed rollers 29 and 30.

The front end of the cloth loading plate 32 is fixed to the sewing machine table 13 with a screw 33 via a spacer 39, and the rear end of the cloth loading plate 32 and the sewing machine table 1
3, a clearance 34 is formed between the two. A slit 35 is formed from the rear end to the front end of the cloth stacking plate 32, and side parts 32a, 32b are formed in the left and right direction.
is formed. Then, the needle bar 2 is inserted into the slit 35.
8 and the fixed needle 36 fall down, and the side portions 32a, 32b of the cloth stacking plate 32 come into contact with the cloth feed rollers 29,30.

Note that 37 is a bed that is pivotally supported on the sewing machine table 13 by a hinge 38. Alternatively, the needle bar 28 is driven by a sewing machine main body (not shown) in a well-known manner. Moreover, when the sewing is finished, the rollers 29, 3
A signal is generated from the memory so that the midpoint of 0 comes immediately after the needle 24 and the cloth W comes off from under the rollers 29 and 30.

The operation of the above structure will be explained based on FIGS. 2 and 3. When the cloth W is placed on the cloth stacking plate 32 and pushed down by hand, the sides 32a, 32b of the cloth stacking plate 32a is bent downward, and the cloth W can be placed between the cloth stacking plate 32 and the pair of rollers 29 and 30. Then, when the hand is removed from the cloth W, the cloth W is held between the cloth loading plate 32 and the rollers 29 and 30 by the elasticity of the cloth loading plate 32.

When the sewing machine is operated in this state, the X-coordinate position signal is transmitted to the first pulse motor 15, the Y-coordinate position signal is transmitted to the second pulse motor 25, and the first pulse motor 15 and the second pulse motor 25 are each driven in synchronization with the sewing machine.

When the first pulse motor 15 is driven, the timing belt 1 is rotated as the shaft 15a rotates.
9 moves, and the moving body 20 integrated with the timing belt 19 is guided by the groove 11c and moves in the X direction, that is, in a direction perpendicular to the cloth feeding direction. Therefore, when the moving body 20 moves in the X direction, the shaft 21 also moves in the X direction.
Since hard rubber is baked on the outer periphery of the rollers 29 and 30 attached to the shaft 21, the frictional force between the rollers 29 and 30 and the cloth W is the same as that between the cloth W and the cloth stacking plate 32. The cloth W follows the movement of the rollers 29 and 30 in the X direction.

Further, when the second pulse motor 25 is driven, its shaft 25a is rotated by the timing belt 2.
7 to rotate the shaft 21. When the shaft 21 rotates, the rollers 29 and 30 rotate and the cloth W moves in the Y direction.

By driving the first pulse motor 15 and the second pulse motor 25, the cloth W is positioned and sewing is performed. When the sewing is completed, the needle 36 is moved between the rollers 29 and 30 as shown in FIG.
The cloth W comes to come off from under the rollers 29 and 30 while being located between them.

Also, if the screw 31 of the roller 29 is loosened, the roller 29 is brought close to the roller 30, and the screw is tightened again, the narrow cloth W is changed from the state shown in FIG. 4 to the state shown in FIG. Can do sewing.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the automatic line drawing sewing device according to the present invention, FIG. 2 is a diagram for explaining the state at the start of sewing, and FIG. 3 is a diagram for explaining the state at the end of sewing. 4 and 5 are views when the distance between the rollers is narrowed, and FIG. 4 explains the state at the start of sewing, and FIG. 5 explains the state at the end of sewing. 15...first pulse motor, 21...axis, 25...
2nd pulse motor, 29, 30...cloth feed roller, 32...cloth loading plate.

Claims (1)

[Claims] 1 (a) Shaft 1 erected on sewing machine table 13
4: (b) A longitudinal wall 11a that is clamped to the shaft 14, extends in the X direction in a plan view, and is perpendicular to the sewing machine table 13, and a Y wall that is perpendicular to the X direction in a plan view. a protruding wall 11e extending in one direction and perpendicular to the sewing machine table 13; a bottom extending from the lower end of the longitudinal wall 11a to the other side in the Y direction and parallel to the sewing machine table 13; A groove 11 carved in the wall 11b and the bottom wall 11b and extending in the X direction
(c) A first motor 15 that is fixed to the longitudinal wall 11a of the machine frame 11 and has a shaft 15a that rotatably penetrates the longitudinal wall 11a and extends toward the bottom wall 11b. : (d) A first motor mounted on the shaft 15a of the first motor 15 and rotating integrally with the shaft 15a.
Gear 16: (e) fixed to the longitudinal wall 11a and connected to the bottom wall 11b;
a shaft 17 extending to the side; (f) a second gear 18 rotatably mounted on the shaft 17; (g) a shaft suspended between the first gear 16 and the second gear 18; Timing belt 19: (h) It is fixed to the lower side of the timing belt 19, and when the first motor 15 is driven, it is guided by the groove 11c of the machine frame 11 and integrated with the lower side of the timing belt 19. Movable body 20 moving in the X direction: (i) integrally attached to the protruding wall 11e so as to extend toward the bottom wall 11b side of the machine frame 11;
A support body 44 having a hole 44c opening in the X direction at its tip: (j) One end portion 21b formed in a round shaft shape, and a hole 44c in the support body 44 formed in a spline shape.
A drive shaft 21 having a central portion 21a passing through the shaft and the other end formed in a round shaft shape and rotatably held by the movable body 20: (k) A drive shaft 21 having a predetermined interval above one end portion 21b of the drive shaft 21. A pair of rollers 30, 3 mounted at
1: (l) The bearing 23 fitted into the hole 44c of the support body 44: (m) The spline bush 24 fixed on the central portion 21a of the drive shaft 21 and press-fitted into the inner ring of the bearing 23: (n) a third gear 22 fixed on the central portion 21a of the drive shaft 21 and located on the opposite side of the rollers 30, 31 with respect to the hole 44c of the support body 44; (o) a protruding wall of the machine frame 11; 11e, and whose shaft 25a rotatably penetrates the protruding wall 11e and is oriented toward one side in the X direction: (p) Shaft 25a of the second motor 25;
A fourth gear 26 mounted on the shaft 25a and rotating integrally with the shaft 25a; and (q) a second timing belt 27 stretched between the third gear 22 and the fourth gear 26. Device.