JPS6176187A - Automatic 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 [Field of Industrial Application] The present invention relates to an automatic sewing machine that stores pattern data in a storage medium and reads out the stored data to form a stitch pattern.

[Conventional technology]

Conventionally, there have been devices for this strain as shown in FIGS. 7, 8, and 9. In the figure, 1 is a sewing machine, 2 is a two-axis drive device for moving a presser foot device 4 according to predetermined pattern data, 3 is a sewing machine tape, 4 is a sewing machine that holds the workpiece by air, and the two-axis drive device 2 5 is a storage medium storing preprogrammed pattern data; 6 is a control device including the storage medium 5 and for controlling the sewing machine 1 and the two-axis drive device 2; 8;
A and 3B are operation devices for operating the drive of the automatic sewing machine, including a 9Vi power switch, 10 is a reset switch that positions the two-axis drive device 2 to a predetermined position and resets the control device 6, and 11 is a reset switch that controls the needle of the sewing machine. a test switch that drives the two axes according to the sewing data without moving; 12 an origin detection device that detects the mechanical origins of the two axes; 16 an intermediate stop switch; 17 a presser foot switch that clamps or releases the presser foot device 4; 14 is a start switch for starting sewing; +5#:l: sewing machine motor;

Further, the presser foot device 4 is constructed as shown in FIG. The second workpiece 62 is completely passed through the U-shaped presser arm 61, and the second workpiece 62 is
63 (second pressing means). Reference numeral 64 indicates a trajectory along which a seam is formed. 66 is a drive device that rotates the U-shaped presser arm 61 as shown in FIG.

Next, the operations shown in FIGS. 7, 8, and 9 will be explained.

As the operating procedure, first, the power switch 9 of the operating device 8B is turned on to start the sewing machine motor 15. Next, the reset switch 1o is turned on and the two-axis drive device 2t is driven to move the presser foot device 4 to an origin position predetermined by the origin detection device 12 (hereinafter referred to as machine origin).

Next, the workpieces 62 and 65 are held by the presser foot device 4.

That is, the first workpiece 65t is held by the first presser foot 60, and the second workpiece 62 is held onto the first workpiece by the second presser foot 63.

Next, when the start switch 14 such as a foot switch is depressed, the predetermined pattern data preprogrammed in the storage medium 5 is transferred to the sewing machine 1 and the two axes at predetermined positions on the first and second workpieces 62 and 65. The presser foot device 4f is activated by the system operation of the drive device 2! : Move and form a seam.

Next, as shown in Figure 8, stitch 68 from the sewing start position 670.
,69,70.71.72 is formed, seam 720th place-・
At this point, the U-shaped presser arm 61t is rotated by the presser arm drive device 66. The above sewing operation is programmed in advance. When the sewing machine 1 finishes sewing continuously from the stitch 72 to the sewing start position 67, the sewing machine 1 automatically cuts the sewing thread and stops, and the presser foot device 4 releases the grip on the workpiece 62, 65 (1
end of cycle).

A series of operations here are controlled by a control device 6, and a drive device 6 for rotating the U-shaped presser arm 61.
The timing for turning on the power to the sewing machine 6 can be programmed to any stitch position 69, and by using this second presser foot 63, it is possible to sew the entire circumference of the object to be sewn. When the sewing is finished, the U-shaped presser arm 61 rotates in the opposite direction and returns to its original position.

[Problem that the invention seeks to solve]

Conventional automatic sewing machines are configured as described above.
The turning operation to rotate the second presser foot and the U-shaped presser arm is performed only once during one cycle of operation when the control device reads the operation instruction programmed at the first time, and then rotates in the opposite direction to return to the original position. It turns out. There is a problem in that the sewing machine cannot be returned to its original position until after a series of sewing operations have been completed.

This invention was made to solve this problem, and the U-shaped presser arm can be moved in any position multiple times during sewing.
An object of the present invention is to obtain an automatic sewing machine having a presser foot device that can be rotated in reverse.

[Failure to solve the problem]

The stitch pattern data of the automatic sewing machine is stored in advance in a storage medium, and the stitch pattern data is sequentially read out to perform automatic sewing.
The workpiece to be sewn is held between the second presser foot and the second presser foot.
The U-shaped presser arm that rotates the presser foot is controlled so that it can be rotated at least once at any stitch position during one cycle of operation of the drive device.

[For production]

In the case of this invention, the second presser foot can be rotated and released and not released at any stitch position during one cycle of the automatic sewing machine, so reverse stitching and skipping operations for complex patterns are possible. In addition, it is possible to easily change the pattern stitching operation of the automatic sewing machine simply by changing the command from the storage medium.

〔Example〕

1 and 2 are system configuration block diagrams showing an embodiment of the present invention, in which 20 is a C
The PU executes all controls, and the FROM 21 stores a system program in advance. and RAM22
operates as a stack RAM of the CPU 20. Also,
A plurality of command codes for rotating the presser arm 61t are stored in advance in the storage medium 5. The boat 52 then sends a signal to rotate the presser arm drive device 24 in the forward or reverse direction. All these operational controls are stored in advance in FROM 21 and are performed by the system program.

Next, the operation will be explained.

First, a sewing pattern as shown in FIG. 3 will be explained as an example. Reference numeral 30 indicates the sewing area of the automatic sewing machine 1, 31 indicates the sewing start position at the machine origin, and the solid line indicates the actual sewing locus. 36 is the first presser arm drive command position, and 37 is the second presser arm drive command position. That is, sewing starts from the machine origin 31. At this time, the U-shaped presser arm 6
1 is located between the machine origin 31 and the first presser arm drive command position 36. Here, the pattern data is inputted from the machine origin 31 through stitches 32, 33, 34, 35, and 36, returning from the stitch position 932 to 37, 31.

Next, when the start switch 14 is depressed, the needle position of the sewing machine 1 starts sewing from the machine origin 31, and the pattern data of the bit configuration shown in FIG. Proceed to 33°34.35.36 and perform actual sewing. Then, at the position of the stitch 36, the CPU 20 issues a 2-byte presser arm drive command (Cot() shown in FIG. 5).

00H) and moves the presser arm drive device 2 to the boat 52.
4 operation signal is output. In response to this signal, the U-shaped presser arm 61 turns to the left (forward rotation), continues sewing, and stops the operation of the sewing machine 1 at the position of the stitch 31. Then, the sewing machine needle is set to the needle-up position, passes over the U-shaped presser arm 61 with a blank feed, and starts sewing again from the stitch 32 position, and presser arm drive command (COH, 0OH ) again 1
When the cPU 20 reads the information, the U-shaped presser arm 61 is rotated to the right (reversely rotated) to form a stitch at the stitch 31t, and one sewing pattern is completed.

That is, as shown in FIG. 6, the drive device is turned on only when the presser arm drive command is read in an odd numbered position, turned off when the presser arm drive command is even numbered, and turned off when the series of operations is completed.

In the above embodiment, the arm of the presser foot rotates and the second workpiece is sewn all the way around the control device of the sewing machine.
It can also be applied to control operations of sewing machines that require 0FF.

〔Effect of the invention〕

As explained above, this invention allows the position of the U-shaped presser arm to be adjusted to 1.
It can be moved multiple times during the cycle, and the sewing area can be freely expanded to any position by rotating the valve arm as necessary, so sewing work can be produced in a single process. This has the effect that it is possible to significantly improve performance and to provide a control device for a sewing machine at a low cost.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a sewing machine control system to which the present invention is applied, Fig. 2 is a block diagram of main parts of the sewing machine control system to which the present invention is applied, and Fig. 3 is a sewing pattern diagram showing a specific example of a sewing pattern. , FIG. 4 is a bit configuration diagram of the pattern data, FIG. 5 is a bit configuration diagram of the presser arm drive command, FIG. 6 is an operation flowchart when the CPU reads the presser arm drive command, and FIG. 7 is a conventional diagram. FIG. 8 is a schematic diagram of a cloth presser device having a U-shaped presser arm, and FIG. 9 is a diagram showing the rotation state of the U-shaped presser arm. 5... Storage medium, 6... Control device, 20... CP
U. 24... Presser arm drive device, 52... Boat, 60...
. . . first presser foot (first suppression means), 61 . . . U-shaped presser arm, 63 . . . second presser foot (second suppression means). Patent Applicant: Mitsubishi Electric Corporation Figure 1 6: Control wholesaler Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8. . 0th,. 11 Figure 9

Claims (2)

[Claims] (1) The stitch pattern data of the automatic sewing machine is stored in advance in a storage medium in the control device, and the stored stitch pattern data is sequentially read out to automatically form stitches. An automatic sewing machine in which a second workpiece is clamped by a pressing means, and a second workpiece is clamped by a second pressing means, the sewing machine having a U-shaped presser arm that rotates the second pressing means by a drive device; An automatic sewing machine characterized by having a control structure that allows a U-shaped presser arm to rotate at least once at any stitch position during one cycle of operation. (2) the second pressing means in the automatic sewing machine is opened at least once or more at an arbitrary position according to a command from the CPU;
The automatic sewing machine according to claim 1, further comprising a presser arm drive device provided through the port so as to prevent the sewing machine from opening.