JPS6080480A - Position detector of 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] [Technical Field of the Invention] The present invention relates to an automatic sewing machine that stores stitch pattern data in a storage medium and sequentially reads out the pattern data to detect the sewing range of an electronic sewing machine that sews the pattern. The present invention relates to a position detection device.

[Prior art]

An example of a conventional automatic sewing machine is schematically shown in FIG. 1 and explained. In FIG.
is a detector that is attached to the head of the sewing machine 1 and generates a needle down position signal, a needle up position signal, and a predetermined pulse per revolution. Reference numeral 3 reads pattern data from a memory element (not shown) in which pattern data is stored in synchronization with the needle down position signal output from the detector 2, and obtains feed amount data corresponding to the stitch length. This control device 3 outputs control data 5x, 5y such as 4N, 4T, forward/reverse, and start date.This control device 3 sequentially addresses address lines of a storage medium (not shown) in which stitch pattern data is stored in advance. This constitutes a device for reading pattern data stored in the storage medium.

6 is an X-axis pulse motor driver 7 by inputting feed amount data 4x and control data 5x from the control device 3.
8 is a Y-axis controller that outputs a forward or reverse pulse train to the Y-axis pulse motor driver 9 by inputting feed amount data 4Y and control data 5Y from the control device 3. A controller, 10 is an X-axis pulse motor, 11 is a Y-axis pulse motor, and the combination of these X-axis controller 6, X-axis pulse motor driver 7, and X-axis pulse motor 1o, and
Axis controller 8. Y-axis pulse motor driver9. A combination of the Y-axis pulse motor 11 constitutes a device that drives the sewing object according to the pattern data by inputting pulses corresponding to the pattern data. 12 is the X-axis pulse motor i
o, X driven by Y-axis Hals %-1+11
This is a Y table. In addition, CW (C1ock Wise) in X-axis and Y-axis pulse motor driver 7.9
is the input end s CCW (Count
er ('1ock Wise) indicates an input end in a counterclockwise direction (leftward direction), and A, A, B, and B each indicate an output end.

In the automatic sewing machine configured in this way, first,
When the control device 3 reads an operation start signal (not shown),
The sewing machine 1 starts rotating, the sewing machine needle starts moving up and down, and sewing begins. When the needle down position signal output from the detector 2 is input to the control device 3, a cpo (not shown) in the control device 3 corresponds to sewing one stitch from a storage medium in which pattern data is stored in advance. Load the data.

Then, the sewing data for one stitch is converted into feed amount data 4x.

Control data such as 4 stitches, sewing speed and direction 5
Output to the X-axis and X-axis controller 6°8 as x and 5r.

Next, the X-axis and X-axis controllers 6.8 operate the X-axis and Y-axis pulse motor drivers 7.8 within the same range relative to the rotation of the sewing machine in the forward and reverse pulse directions set by the control data 5x and 57. 9 shows the feed amount data 41 and 4, respectively.
Outputs a pulse train for the number of pulses set by Y. Here, this pulse train uses pulses generated from the detector 2.

(-), the X-axis and Y-axis pulse motor drivers 7.9 excite the coils of the X-axis and Y-axis pulse motors 10.11, respectively, in accordance with the above-mentioned pulse train input, and , 11 are rotated.Accompanying with this rotation, the cloth presser device (not shown) attached to the XY table 12 is moved by the stitch length of one stitch, and the sewing of one stitch is completed.

An example of a conventional presser foot drive range detection device used in such an automatic force stitching sewing machine is shown in FIG. ), 15 is a boat for input/output, 16 is a signal force line for the ← direction movement limit of the presser device (not shown), and 17 is the ← direction movement limit of the presser device (not shown).
) direction movement limit signal input lines 18 and 19 are the sol-up resistances of the signal input line 16 and signal input line 17, respectively.

Reference numeral 20 denotes an xyY table for driving the presser device in each of the x and y directions to form a pattern, and one of the xh and y directions is shown. 21 is mounted on the XY table 20 (-)
Direction limit switch (-LIMIT jump), 22 is → direction limit switch (+LIMIT 5W) 23 is XY
A detection plate 23a that moves together with the presser device of the table 20.
(→ direction limit switch 21 is stepped on,
23b, the (→ direction limit switch 22 is stepped on).

The operation of the presser foot drive range detection apparatus configured as described above will be explained with reference to chart 70 in FIG.

First, when the presser foot holding the sewing material is moved to pass the pattern data, the detection plate 23, which moves together with the presser foot, is also moved in the same way.

Now, if it continues to be moved in one direction, for example, the (c) direction, one point 23aE of the detection plate 23→direction limit switch 21 is depressed, and the signal is transmitted to the signal input line 17. And then the CPU14. Read the data through the boat 15 and follow the flowchart shown in Figure 3 (-)
It is determined that the direction limit switch 21 is in the on state, (c) the limit flag is set to 11, and the original flow is returned. The system is configured such that necessary data processing is executed in subsequent programs depending on the state of this limit flag.

Note that the limit switch 22 in the (G) direction is also detected and processed in the same manner as above.

However, in the presser foot drive range detection device configured in this way, two limit switches are required for each direction (→, ←), so there are many wires connected to the mechanism part, which causes noise. There are many opportunities to ride,
The disadvantage was that the price was high and p1 was not economical.

[Seed number of invention]

The present invention has been made in order to solve the above-mentioned problems and eliminate such drawbacks, and its purpose is to determine the limit detection direction based on movement direction data from pattern data with a simple configuration. An object of the present invention is to provide a position detection device for an automatic sewing machine that can perform automatic stitching.

In order to achieve such an object, the present invention is provided with one detector for detecting a sewing range, and the driving range of a device for driving a sewing object according to pattern data can be adjusted in one direction from the one detector. The determination can be made from one detection signal and movement direction data from the pattern data.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 4 is a block diagram showing an embodiment of a position detection device for an automatic sewing machine according to the present invention, and only the parts necessary for explanation are shown.

In FIG. 4, the same symbols as in FIG. 2 indicate corresponding parts, 24 is a sewing range signal input line of the presser foot device, 25
is a pull amplifier resistor connected to this sewing range signal input line 24.

Further, 26 is a limit switch (LIMIT SW) installed in the XY table 20, 27 is a detection plate that moves together with the presser device, and each point of 27a and 27b is configured to step on the limit switch 26, respectively. Note that the arrows indicate the (→ direction and ←) direction of the limit switch 26.

Next, the operation of the embodiment shown in FIG. 4 will be explained with reference to the table below and the flowchart shown in FIG.

First, when the presser foot holding the sewing material is moved to pass pattern data, the detection plate (see FIG. 2) that moves together with the presser foot is also moved in the same way.

Now, if it continues to be moved in the ←) direction, the detector 2701 point 27b steps on the limit switch 26, and the signal from the limit switch 26 is transmitted to the eccentric force line 24 and sent to the CP through the 24 boat 15.
U 14 reads the position detection information.

Here, the pattern data for one stitch is configured as shown in the table below, and the X data XDo''-XD4 or Y data YDo to YD4 are the amounts by which the presser foot moves in the X direction and the Y direction, respectively. X5GN or YS
GN indicates movement direction data.

When the moving direction data X5GN or the moving direction data YSGN is 1", it is set to move in the (→ direction), and when it is 10, it is set to move in the ← direction.

Now, when the CPU 14 reads the information that the limit switch 26 has been stepped on, as shown in the flowchart shown in FIG.
GN) is read, and if it is 1", set the limit flag to IN, and if it is %O, set the limit flag to 11, and return to the original flow.

The CPU 14 is configured to execute necessary data processing in subsequent programs depending on the state of the limit flag.

In this way, there is only one switch to detect the sewing range,
Since the limit detection direction can be determined based on the movement direction data from the pattern data, the wiring is simplified, there is less chance of noise being introduced into the wiring, and the device still has the advantage of being inexpensive.

〔Effect of the invention〕

As explained above, according to the present invention, the movement limit of the presser foot device can be detected with one limit switch per direction, which simplifies the wiring. There are few chances for noise to occur, and
Since the device can be realized at low cost, the practical effect is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an outline of an example of a conventional automatic sewing machine, Fig. 2 is a block diagram showing an example of a conventional presser foot drive range detection device, and Fig. 3 is a flowchart for explaining the operation of Fig. 2. 4 is a block diagram showing an embodiment of the position detection device for an automatic sewing machine according to the present invention, and FIG. 5 is a flowchart for explaining the operation of FIG. 4. 1... Sewing machine, 2... Detector, 3φ... Control device, 6, 8... X-axis, Y-axis controller, 7.9
---X-axis, Y-axis pulse motor driver, 10.1i
Fist...X axis, Ym pulse motor, 26...limit switch, 27...detector. Agent Masuo Oiwa procedural amendment (voluntary) 1. Indication of the case Japanese Patent Application No. 182204/1982 2, Title of the invention Position detection device for automatic stitching sewing machine 3, Person making the amendment Relationship to the case Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name Name
(601) Mitsubishi Electric Corporation Representative Hitoshi Katayama, Department 4, Agent (1) Amend "Figure 2" on page 9, line 2 of the specification to "Figure 4." (2) "Detector" in the third line of the same page of the same book is corrected to "detection plate." (3) "Detector" in the same book, page 11, line 16, is replaced by "detection board"
and correct it. that's all

Claims (1)

[Claims] A sewing machine equipped with a device that sequentially addresses the address lines of a storage medium in which stitch pattern data is stored in advance to read out the stored pattern data, and a pivot device that drives the object to be sewn according to the pattern data. Detecting range 1
The drive range of the drive device is determined by the drive range of the drive device.
1. A position detection device for an automatic sewing machine, characterized in that a position detection device for an automatic sewing machine is capable of making a determination based on one detection signal per direction from two detectors and movement direction data from the pattern data.