JPS59115074A - Automatic pattern stitching 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 The present invention relates to an automatic pattern stitch sewing machine in which a futon or side fabric of a futon is placed on a movable table and is moved along a sewing pattern with respect to the sewing machine body using a drive device for C-stitching.

Conventionally, this type of sewing machine has an upper frame 2 on which a sewing machine head 1 is provided, and a sewing machine trough 3.
a sewing machine base No. 5 having a lower frame 4 provided with;
A movable table 6 on which the object to be sewn is placed is provided so as to be movable in the horizontal direction, and a drive device moves the movable table 6 along the C stitching pattern with respect to the sewing machine head 1 and the sewing machine trough 3 to place the object to be sewn. It's like sewing °C.

When sewing the C1 curved pattern, if the feeding direction (needle movement direction) of the sewing machine is tangential to the sewing pattern, the sewing action can be performed smoothly and accurately.
As shown in Publication No. 7571, the sewing machine head 1 and the sewing machine trough 3 are made rotatable, and the sewing machine head 1 and the trough 3 are rotated in accordance with the movement of the movable table 6, and the tangent line of the sewing pattern is The feed direction of the sewing machine is made to match the direction.

In response to the movement of this movable table 6, the C sewing machine head and the valley part 3 are
The conventional means for rotating is as described in the above publication,
A mechanical mechanism such as a chain, a transmission shaft, etc. is also used to synchronize the sewing machine head 1 and the trough 3.

By the way, when automatically suturing a thick object with a large suture area, the object A to be sutured is set in an expanded state on a tensioning frame, and the object A to be sutured is placed on the movable table 6 together with this frame. It is usual. At this time, the frame and the object to be sewn must be passed between the sewing machine head 1 and the sewing machine trough 3, but the distance between them is generally about 20 m/m, so if the object to be sewn becomes thick, This makes the work of placing the base on the rotary table 6 difficult.

In addition, the tension frame must be thin only in the portion that passes between them, resulting in high production costs.

In order to make this work smooth, the head of the sewing machine should be able to move up and down, but as in the conventional method, a mechanical mechanism is used to synchronize the head and the troughs of the sewing machine and to adjust the feed direction of the sewing machine. Providing a vertical movement mechanism for the sewing machine head in a machine that corresponds to the above would complicate the above-mentioned same gate and corresponding mechanism, and it would be necessary to improve the machining accuracy of each part in order to perform the correspondence accurately and smoothly. No. For example, if a large number of gears are required as a synchronization mechanism and the machining accuracy is low, the angular accuracy will be inaccurate due to backlash.

In view of the above points, this invention electrically synchronizes the driving of the sewing machine head and the driving of the minnow/trough portions.
The mechanism is designed to easily move the C sewing machine head up and down.

In other words, in the conventional automatic pattern stitch sewing machine mentioned above, the C1 upper frame is provided with a vertical rotating shaft that can be moved up and down, and the sewing machine head and its drive motor are attached to the lower end of the rotating shaft. Install a device to move the rotating shaft upward, and install a vertical rotating shaft on the lower frame, and attach a groove of the sewing machine and its drive motor to the upper end of the rotating shaft, and connect both of the motors. electrically the same
In addition to A, means for synchronously rotating the two rotary shafts is provided so that the rotation of the two rotary shafts corresponds to the driving device of the movable base.

By configuring as described above, it is possible to accurately and easily synchronize the sewing machine head and the MIJI 7 hook, and also to cause both to correspond accurately and easily to the movement of the movable base. In addition, by raising the sewing machine head, it is possible to easily set even thick objects to be sewn, and when the sewing machine is stopped and before starting, the origin and head are connected to the C1 sewing machine head and the trough motor. When driving each to match the synchronization origin of the turning direction of the part and the trough at the position of the 7-car of the encoder, etc., the sewing machine head can be raised upwards and the head and the trough can be moved far apart for C operation. , which has the advantage of being easy to operate.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the sewing machine base 5 consists of two stand frames and upper and lower frames 2 and 4 installed between the stand frames. The upper frame 2 has a sewing machine head 1. Sewing machine troughs 3 are attached to the lower frame 4 so as to face each other, and stitching is performed by interposing the object to be sewn between them.

Lower part of sewing machine base 5 (back and forth direction of two moss (Y-axis direction)
A rail 6' is provided on the base of the rail 6', and a concave frame-shaped cart 8 is provided on the rail 6' with wheels 7 so as to be movable back and forth. A feed screw 9 is provided, and this screw 9 is threaded through the truck 8. Rotation of the screw 9 by the motor 10 moves the truck 8 forward.The side of the truck 8 in the left and right direction (X-axis direction) is A rectangular parallelepiped frame-shaped OJ moving platform 6 is attached to the rail and is provided on it via wheels 11 so as to be movable from side to side.Dolly 8
A feed screw 12 in the left and right direction is installed on the left and right sides of the
The movable base 6 moves left and right with respect to the trolley 8 by turning the screw 120 times. Therefore, the movable table 6 on which the object to be sutured is placed can be moved to any position on the horizontal plane (on the XY coordinates) by the motors 10 and 13, and various movements can be made by appropriately setting this movement trajectory. It is possible to obtain a suture pattern of

A rotating shaft for vertical rotation is provided at the center of the lower frame 4 via a bearing 14, and the sewing machine hook 3 and its driving motor 16 are mounted on the shaft 15.

The lower end of the rotary shaft 15 is connected to a rotating motor 17 fixed to the lower frame 4, and by driving this motor 17, the sewing machine trough 3 is oriented in an arbitrary direction in accordance with the direction of feed.

- There is also a bearing 1 in the center of the F section frame 2 as shown in Figure 3.
A C pipe-shaped rotating shaft 19 is provided so as to be movable in the vertical direction via a shaft 19, and a sewing machine head 1 and its driving motor 20 are attached to the lower end of this shaft 19. indicates a zigzag stitch sewing machine, and in the figure, 20 is a sewing machine needle, 21 is a presser foot, 22... needle rocking table, 23...
- Camshaft worm wheel, 24...A worm for the needle swing cam. A collar 25 is fitted into the upper part of the rotation rlIlt+ 19, and a circumferential groove 26 is formed at the upper end of the collar 25.
is formed, and the body becomes a gear 27. As shown in FIG. 4, a rotatable cam follower 28' at the tip of the U-shaped locking portion of the crank 28 is fitted into the groove 26, and the crank 28 is swung from the cylinder 291, causing the crank 28 to oscillate. The rotating shaft 19 moves up and down due to the movement. This amount of movement may be set appropriately, and the bottom dead center is determined by the position where the collar 25 contacts the bearing 18. color 25
A gear fixed to the rotating shaft of a motor 30 meshes with the gear 27 of the motor 30, and the sewing machine head 1 can be moved in any direction by driving the motor 30. 31 is fixed, an arbitrary number of current-carrying parts 32 are formed concentrically on this plate 31, and a control lead wire 33 of the sewing machine head 1 passing through the rotating shaft 19 is connected to the lower surface of the current-carrying parts 32. .A sewing machine controller (not shown) is mounted on the upper surface of the current-carrying plate 31.
The electrically conductive member 35 such as a carbon brush that has been connected to the lead wire 34 comes into contact with the electrically conductive member 35, and both lead wires 33 and 34 are connected by contact between the electrically conductive member 35 and the electrically conductive portion 32.

The motor 20 for driving the sewing machine head 1 and the motor 16 for driving the sewing machine hook 3 are operated in the same manner, and both rotation motors 17 and 30 are operated in response to the movement of the movable table 6. The feed direction of the sewing machine is aligned with the tangential direction of the sewing pattern.

Further, the motors 10.13 are operated based on numerical control with the moving plane of the movable base 6 being the XY coordinates, and the motors 17, 3
0 will also be automated by operating it using a control method that digitizes the rotation angle.

The embodiment is constructed as described above, and when sewing a futon or the like, the object to be sewn is placed on the movable table 6, and the movable table 61 is set by controlling the motors 16 and 20. The motor 17.30 is also operated in accordance with the movement of the movable base 6 to align the feed direction of the sewing machine with the tangential direction of the sewing pattern. and perform one smooth suture. When placing the object to be sutured on the movable table 6 and setting it between the 0677 head 1.7 section 3,
If the object A to be sewn is thick and it is difficult to set it in the gap (in this case, the sewing machine head 1 may be raised using the cylinder 29).

In Embodiment 11, the rotating shaft 19 was moved up and down by a crank mechanism, but a vertical rack was provided on the rotating shaft 19, and a pinion that meshed with this rack was rotated by a motor, and this gear mechanism moved the rotating shaft 19. may be moved up and down.

Further, in the embodiment, the sewing machine head 1 is operated by the motor 17.30.
The can part 3 and can part 3 are rotated synchronously, but the two rotating mechanisms are mechanically transmitted, and the cylinder mechanism is operated by one motor (a strainer 7C is also preferable).

[Brief explanation of drawings]

Figure 1 shows one example of the automatic pattern sewing machine of this invention.
Item to be sewn, 1... Sewing machine head, 2... Upper frame, 3... Sewing machine trough, 4... Lower 7L'-m, 5...
... Sewing machine base, 6... Movable base, 9.12... Feed screw, 10.13... Motor, 15... Rotating shaft, 1
6.20...Motor, 17.30...Motor, 19
... Rotating shaft, 29... Cylinder. Patent applicant Yama-Sewing Machine Industry Co., Ltd. Agent Kama 1) Bun 2

Claims (1)

[Claims] 977 A movable table on which the object to be sewn is placed is provided on a sewing machine base having an upper frame with a head and an F frame with a sewing machine trough, and the movable table is movable in the horizontal direction. The head of the sewing machine and the valley part (an automatic pattern sewing machine that stitches CF and sutures by moving them side by side) have a rotating shaft in the vertical direction that can be moved up and down in a part of the frame. Attach the sewing machine head and its drive motor, and install a device to move the rotation axis of the upper flenometer up and down. A lever is installed on the upper end of the rotation shaft of the sewing machine, and a drive motor is attached to the upper end of the rotation shaft of the sewing machine, and a means is provided for electrically opening both the motors and rotating the two rotation shafts four times, and An automatic pattern stitch sewing machine characterized in that the rotation of both rotating shafts corresponds to the drive device of the movable base.