JPS5949029B2 - sewing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sewing device that performs a series of sewing operations by inputting programs corresponding to a plurality of sewing steps.

The present invention will be explained below based on the embodiments shown in the drawings.

FIG. 1 shows a schematic configuration diagram of a device used in the present invention. In the figure, 1 is the main body of the sewing machine, 2 is a variable speed motor for driving the sewing machine, and 3 is a motor for controlling the variable speed motor 2. A motor control device, 4 is a pedal for driving the motor 2 via the motor control device 3, 5 is a sewing machine pulley provided on the main shaft of the sewing machine, 6 is a needle position detection device of the sewing machine, and 7 is a pedal for driving the motor 2 through the motor control device 3; A speed detection device 8 detects the rotational speed of the main shaft, and a program control device 8 controls the motor control device 3 in response to signals from the needle position detection device 6 and speed detection device 7. Input device 9 compatible with the sewing process of a sewing machine
It is controlled by

Next, the operation of the present invention will be explained based on FIGS. 2 and 3.

First, when sewing the pocket 11 on the cloth 10 shown in FIG. 2, the pedal 4 is depressed and the sewing machine is driven.The sewing machine is driven at medium speed in response to a medium speed drive command signal to execute sewing of the lla and llb parts, and the lla and llb sections are sewn. , When the sewing process of the 118th part is completed (at time jl, jz), the return solenoid is energized, and the sewing process of the 118th part is energized.
Complete the sewing work of section 1b.

Next, upon completion of the sewing process in section 11b, the sewing machine is driven at high speed by a high speed drive command signal to perform sewing.
When the number of remaining stitches in the section is, for example, the third stitch, 100
After finishing the straight stitching step at time t3, the presser foot lifting solenoid is energized to raise the presser foot, and the seamstress changes the sewing direction of the cloth.

Further, the lid, lle, and 11f sections are sewn in accordance with the operation of section 100 described above, and when the return solenoid is energized at time t4, the sewing direction of the cloth 10 is reversed and the stitching direction of the cloth 10 is reversed.
Section g is sewn, and at time t5, the solenoid is energized by the thread trimming solenoid signal to perform a thread trimming operation, and the presser foot is raised by the presser foot lifting solenoid signal to complete the series of sewing steps.

Next, the configuration for executing the program reading of the present invention will be described in detail. First, as shown in FIG.
Number of stitches (stitch length) according to the process and T corresponding to each process
ACK (tacking stitch), PFL (pressing upper part), REV (
By storing operation command signals for reverse stitching) and TRIM (thread trimming) and inputting them to the input device 9 shown in FIG. 1, the series of sewing operations for the pocket portion described above can be completed.

FIG. 5 shows a block diagram for executing program reading according to the present invention, in which 12 is a memory consisting of the above-mentioned stitch number storage section 12a and output command section 12b;
3 is a latch circuit that holds the output from the output command section 12b and outputs various commands such as fixing stitching, presser foot lifting, reverse stitching, and thread trimming to the sequence control circuit 14, and also displays various commands on the display section 15; 16 is the above-mentioned latch circuit; a counter 17 for counting the number of stitches stored in the stitch number storage section of the memory 12;
is a pulse generation circuit that generates count pulses according to the number of stitches based on the needle synchronization signal from the sewing machine motor control device 3;
18 is a coincidence circuit that sends a coincidence signal to the sequence control circuit 14 when the number of stitches corresponding to the pulses generated by the count pulse generation circuit matches the number of stitches set by the memory 12; 19 is an increment command for the sequence control circuit 14; This is a program counter that is incremented by and energizes the memory 12.

That is, by inputting the number of stitches and operation commands corresponding to the sewing length in each process in advance into the memory 12 in FIG. When the number of stitches corresponds to the count pulse of , in other words, when sewing of a predetermined stitch length is completed, a match signal is input to the sequence control circuit 14, and the sequence control circuit 14 inputs a match signal from the latch circuit 13. Tight stitching, presser foot lifting, etc. according to the process,
By selecting various commands such as reverse stitching and thread trimming, and generating an increment signal in response to a pedal depression signal from the sewing machine motor control device 3, the program counter 19 advances and moves to the next sewing process. This is how it was done.

In addition, in the above embodiment, tacking stitches, presser foot lifting,
Although the example has been given for four types of operation commands, reverse stitching and thread trimming, and the number of steps is seven, the present invention is not limited to this, and in short, it is sufficient to input a program corresponding to a plurality of arbitrary sewing steps. Of course.

As described above, according to the present invention, multiple sewing processes can be completed by inputting multiple programs corresponding to multiple sewing processes. If the present invention is applied to sewing work, particularly in detail sewing work, great effects can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of the device of the present invention, FIG. 2 is a diagram showing one aspect of the sewing process by the device of the present invention, and FIG. 3 is a waveform for explaining the operation in detail of the present invention. Figure, 4th
The figure shows an example of the memory used in the present invention, and FIG. 5 is a configuration diagram showing the main parts of the device of the present invention. In the figure, 1 is a sewing machine, 2 is a variable speed motor, 3 is a motor control device, 4 is a pedal, 8 is a program control device, 9
12 is an input device, 12 is a memory, 13 is a latch circuit, 14 is a sequence control circuit, 16 is a counter, and 17 is a stitch count pulse generation circuit. Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims] 1. For a series of multiple types of sewing processes set in a desired order, the number of stitches and required operation command signals such as backstitching, presser foot lifting, backstitching, thread trimming, etc. are determined for each of the above steps. and a memory that stores these as a set, and when the operation of a certain predetermined process is performed, the correspondence between the corresponding number of stitches stored in the memory and the count pulse generated based on the needle synchronization signal by driving the sewing machine is determined. means for outputting a coincidence signal when the coincidence is found; and means for selecting the operation command signal in the predetermined step when the coincidence signal is output, and selecting the operation command signal in the predetermined step in response to the pedal signal. What is claimed is: 1. A sewing machine comprising means for advancing to the next step; and a sewing machine drive control means to which selected operation command signals are sequentially input.