JPS59105489A - 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 The present invention relates to an automatic sewing machine that stores pattern data in a storage medium and reads this data to form a stitch pattern.

Conventionally, there has been a device of this type as shown in FIG.

In the figure (11 is the sewing machine, (2) is the presser foot device (4)
A two-axis drive device for moving everything according to predetermined pattern data, (3) a sewing machine table, and (4) a cloth that holds the entire workpiece (sewn material) and is driven by the two-axis drive device (2). A presser device, (5) a storage medium storing all pre-programmed pattern data, and (6) a storage medium (517
(sA') and (8B) are operating devices for operating the drive of the automatic sewing machine; (9)
is the power switch, and α is the position of the two-axis drive device (2) in a predetermined position. A reset switch that resets the system (1υ is a test switch that drives the two axes according to the sewing data without moving the needle of the sewing machine, α2 is an origin detection device that detects the mechanical origin of the two axes, (14 is used to start sewing) The start switch, α, is the motor for the sewing machine.

Next, the operation will be explained according to FIG.

When the power switch (9) included in the operating device (8B) is fully operated, the sewing machine motor haze is started. Next, operate the reset switch [1-] to a position predetermined by the origin detection device U (hereinafter referred to as the machine origin).

The two-axis drive device (2) is fully driven, and the presser foot device (4) is fully moved.

Next, the workpiece is held by the presser device (4), and when the start switch 04 is operated, the workpiece is pressed according to the predetermined pattern data programmed in the storage medium (5).

Sewing machine (1) and two-axis drive device (
2) is driven, the presser foot device (4) moves, and the seams are shaped and pressed (.

When the sewing is finished, the sewing thread is automatically cut and the sewing machine (1
1 stops, and the presser device (4) fully releases the clamping of the workpiece.

These series of operations are controlled by a control device (6).

In the above, the pattern data pre-programmed in the storage medium is moved from the machine origin to the sewing start position by a blank feed (without fully driving the sewing machine).

When the sewing is fully started and finished, the storage medium (5)
Simultaneously with the instruction to end the pattern data, the automatic sewing machine body returns to the machine origin using the origin detection device α=, and then stops.

As described above, in an automatic sewing machine having an origin function using a position detection device at the start and end of sewing, all sewing operations are performed at the entire center of the machine origin.

Conventional automatic sewing machines that have a mechanical home position using a position detection device are configured in one or more ways.

For patterns where the sewing start and seam tightness are close to each other.

This method has the disadvantage that the idle feeding time is added for each sewing operation, resulting in a decrease in work efficiency.

Furthermore, when the device is manufactured at low cost, there is a drawback that it is difficult to vary the first origin easily and accurately in a short period of time.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above.In addition to the machine origin, which is the first origin, a second origin, the metal gold plate, is held at a specified position, and is used for each sewing. The present invention aims to provide an automatic sewing machine that can start and end sewing from this second origin.

An embodiment of this invention is shown in FIG. 2 below.

In the figure, (6) is the control device part of the automatic sewing machine.

CPU (4) performs all control, 'PRO'Ma
'l) has a system program stored in advance.

The RAM (to) operates as a stack RAM for the CPU (21).

A second origin code indicating the second origin position is stored in advance in the storage medium (5), and data for air feeding to this second origin position at the end of sewing is stored.

Note that the other configurations are the same as those in FIG. 1, so explanations will be omitted.

Next, the operation will be explained.

In the case of sewing data as shown in Figure 3, (7) is the sewing area of the automatic sewing machine, (31) is the machine origin, and (3
2) is the second origin or sewing start position, and (33) is the sewing end position.

When the start switch a4) is fully operated or the test switch α1) is fully operated, the needle position is at the first origin, that is, the machine origin, and the needle is not sewn while sequentially reading out the jump feed data stored in the storage medium (5). Second origin position (32
). The CPU reads the entire second origin code from the storage medium (5) at this position, sets this position as the second origin, and holds it in the stack RAM (2tr).Actually, it stores the address or block number of the storage medium (5). .Subsequently, sewing starts from this position (32), ends at the sewing end position (33), and after cutting the thread, the storage medium (
5) Full view of the empty feed data.

It returns to position (32) and compares it with the data in the stack RAM (2a), recognizes that it is the second origin, and finishes the 1st-th sewing.The second and subsequent sewing or toma test (all ), the pattern data is traced at the center of this second origin position (32) i.Operate the reset switch αα or turn the power switch (91)
When it is turned 1oN again after it is completely OFF, the first origin (31) K needle position moves.

By adding the second origin code as described above, it becomes possible to have the origin at any position.

In addition to the above embodiments, the meaning of the second origin is that the specified position on the sewing machine body side is the entire second origin,
If you drive the two axes according to the sewing data and operate the newly installed switch at the point you want to specify as the second origin, the CPU can read all of this and operate it from there as the second origin. It has a similar effect of smelling like gold.

As described above, according to the present invention, the total time required for sewing can be significantly reduced, and the effects of improved functionality and usability can be obtained simply by rewriting the system ROM without requiring any major modification of the equipment. be.

[Brief explanation of the drawing]

FIG. 1 is an external view of a conventional automatic sewing machine, FIG. 2 is a circuit diagram of a main part to which the present invention is applied, and FIG. 3 is an explanatory diagram showing a specific example of sewing data. In the figure, 00) is the sewing area, (31) is the first origin (machine origin) position, (32) is the second origin, (3
3) The sewing end position is completely sold. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Shin Kuzuno −

Claims (2)

[Claims] (1) A total control device sequentially reads out stitch pattern data stored in advance in a storage medium and controls a drive device for feeding the sewn product to form all the stitches, wherein the control device stores stitch pattern data in the storage medium. Sewing starts from the position according to the memorized origin data. Further, the automatic sewing machine is characterized in that the drive device is fully controlled so that sewing is completely completed at a position according to the origin data. (2) The automatic sewing machine according to claim 1, characterized in that the origin data stored in the storage medium is made variable.