JPS6077789A - 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] [Technical Field of the Invention] The present invention moves a presser foot that clamps cloth to the shape of a pattern data pattern stored in a memory element such as FROM, thereby obtaining a seam of a constant shape. The present invention relates to an automatic sewing machine, and more particularly to an automatic sewing machine that can prevent a pulse motor from slipping out of synch.

[Prior Art] An example of a conventional automatic sewing machine is schematically shown in FIG. 1 and will be explained. In the figure, 1 is a sewing machine that forms stitches, 2 is a sewing machine attached to the head of this sewing machine 10, and a needle lower row signal, a needle This is a detector that generates an upper position signal and a predetermined pulse per revolution. 3 reads the pattern data from a memory element (not shown) in which the pattern data is stored in synchronization with the needle down position signal output from the detector 2, and calculates the feed amount corresponding to the stitch length. This control device 3 outputs control data 5x, 5y including data 4X14Y and forward/reverse 9 start dates.This control device 3 records stitch pattern data 1,
The present invention constitutes a device that reads pattern data stored in a storage medium (not shown) by sequentially specifying address lines of the storage medium (not shown).

G is an XgI controller that outputs a forward or reverse pulse train to the X-axis pulse motor driver 7, which inputs feed hammer data 4x and control data 5X from the control device 3, and 8 is feed amount data 4Y from the control device 3. and a Y-axis controller that outputs a forward or reverse pulse train to the Jy-axis pulse motor driver 9 by inputting control data 5Y, 10 is an X-axis pulse motor, 11 is an ylJ+Hulse motor, Korera Xl1JI controller 6, and X-axis pulse Motor driver r, xyB Hals motor 1o
combination and Y-axis controller8. A combination of the YQII pulse motor door (ba 9, Yilt + pulse smoke 11) constitutes a device that drives the workpiece according to the pattern data by inputting pulses corresponding to the pattern data.Here, the X-axis and Y-axis controllers 6゜8 each has a built-in pulse generator.

12cm x jkll pulse motor 10, Yellow
This is an XY table driven by a Hals motor 11. In addition, X-axis and Y-axis pulse motor driver 7.9
The input end of the CW (C1ock Wise) X-axis and Y-axis pulse motor 10.11 is clockwise (clockwise);
Wise) indicates a counterclockwise (leftward direction) input end, and A, A, B, and 13 each indicate an output end.

In the automatic sewing machine configured in this way,
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 CPU (not shown) in the control device 3 reads t! for one stitch from the storage medium in which pattern data is stored in advance. Read the data corresponding to the product. Then, the sewing data for one stitch is converted into feed amount data 4x.
+4Y and control data 5x, 5y such as sewing speed and direction are output to the X-axis and Y-axis controllers 6.8.

Next, this XG11 with a built-in charge generator
, Y Q controller 6.8 sends feed amount data to X-axis and Y-axis pulse motor drivers 1 and 9 within the same range of rotation of the sewing machine in the forward and reverse pulse directions set by control data 5x and 5y, respectively. 4x.

Outputs a pulse train equal to the number of pulses set by 4Y. and x Il'jl , y-axis pulse motor driver T.

X-axis and Yrl' respectively according to the above pulse train input.
, h The coils of the pulse motors 10 and 11 are excited, and the respective X and Y4a pulse motors 10 and 11 are rotated.

In conjunction with this rotation, the presser foot device (not shown) mounted on the XY table 12 is moved by the stitch length of one stitch, thereby completing the sewing of one stitch.

However, in order to obtain a pulse train corresponding to the ink stitch length in an automatic sewing machine configured in this way, an expensive controller must be used, making the device itself very expensive. LC has this drawback. Axe (
A stable method is to use an element that uses a specific number of pulses output from the detector per rotation and generates a divided pulse train in synchronization with the pulses for the set feed amount data. However, this method has the disadvantage that it is not possible to change the pulse train or control things like slowing up and down.

[Summary of the invention]

In view of the above points, the present invention has been made to solve such problems and eliminate such drawbacks.The purpose of the present invention is to provide an inexpensive and easy-to-use system that can generate arbitrary pulse sequences including slow-up, down-down, etc. with a simple configuration. Our goal is to provide an automatic sewing machine that can sew easily.

In order to achieve such an object, the present invention stores pulse information for each stitch length in a memory element, and scans a predetermined address range specified by pattern data using a counter or the like. A pulse array output circuit is provided for outputting pulses corresponding to each pattern data from each data line of the storage element.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 2 is a block diagram showing an embodiment of the automatic sewing machine according to the present invention, and shows an example of a pulse train generation circuit corresponding to the stitch length used in the present invention. The same reference numerals as those in the figure indicate corresponding parts, 13 is control data such as clock pulses and pull-down position signals output from the control device 3 shown in FIG. °' A cloth speed shift gate circuit 15 outputs a cloth speed period signal S and a clock pulse P. A cloth speed shift gate circuit 15 outputs a clock pulse P only when the cloth speed period signal S from the cloth feed gate circuit 14 is at a low level. Count and output: ;d child IQA・IQn, IQc, IQD,
This is a counter that outputs count data from 2Q person and 2QnKO to 63. In the counter 15, 1T is an input terminal to which the clock pulse P is applied;
RD is a counter reset input terminal to which the cloth feeding period (S) is applied, and 2T is an input node a to which the output of the output terminal IQn is applied.

16x and 16y use a pulse train corresponding to the stitch length and use 4 bytes for each stitch length, and in the 1st bit, store ``1'' as a pulse and ``0'' as a pulse h. 64 bytes are sequentially addressed by a pulse train Fh from the output terminals IQA to 2QB of the counter 15 connected to the address line Ao-As,
Q elements 17 and 18 are the 1st-bin data helix (output of the transmitted signal sequence) of the Hals-listed td elements 16x and 16y, respectively.

Next, the operation of the embodiment shown in FIG. 2 will be explained with reference to the table shown below and FIG. 3.

1. The pattern data for one stitch consisting of X data and X data is shown in Table 1 below. (a) shows the control data, and (b) shows the sending group data. Moreover, 4.0 pus indicates the stitch length.

Table 2 below shows the stitch lengths and the pulse train start addresses of the pulse train storage elements 16X and 16y (see FIG. 2) that store pulse trains corresponding to the stitch lengths.

Table 2 Further, the pulse train data of the pulse train storage elements 16x and 16y with the stitch length of 4.0 wa shown in Table 1 are shown in Table 3 below.

Table 3 FIG. 3 is a time chart for explaining the operation of the conventional configuration shown in FIG. 1 and the embodiment shown in FIG.
(a) shows the needle bar motion, (b) shows the needle lower position signal, and (c) shows the manual reset RD of the counter 15.
, (d) shows the sending pulse train output 17.18.

First, when the control device 3 shown in FIG. 1 reads an operation start signal, the sewing machine 1 starts rotating, the sewing machine needle starts moving up and down (see FIG. 3(a)), and sewing begins. and,
When the needle down position signal (see FIG. 3(b)) output from the detector 2 shown in FIG. The data for one stitch shown in the first table is read from the storage medium and stored in the address lines 86 to 86 of the pulse train storage elements 16x and 16Y as moving scenery data 4x and 4y for X and Y, respectively.
Output to Ato. Here, the forward view data 4x, 4r
The stitch length is 0.2 times the feed amount data expressed in decimal notation. In the case of Table 1, the feed amount data (first
(see (b)) is 20 in decimal, so the stitch length at this time is 20 x O, 2 = 4. Became Otm,
The number of pulses at this time is 20. In other words, the XY table 12 (
(see Figure 1) have been set.

Next, the CPU in the control device 3 shown in FIG. 1 outputs the feed i data and at the same time outputs the control data 13 to the cloth feed gate circuit 14. This cloth feed gate circuit 14 sets the cloth speed period signal S to a low level, enables the counter 15, and outputs a clock pulse P to the counter 15. When 64 clock pulses P are outputted,
The cloth speed period signal S becomes "high speed", and the counter 1
5 digits will be reset. And the counter 15 is equal to 1t in response to the clock pulse P from the cloth feed gate circuit 14.
131- outputs the count data to the output value i child 1Q-2QB, and inputs the feed amount data shown in Table 2 from 6-A.
Pulse train storage element 1 (ix, 16
Sequentially address 64 bytes from the address of y 1° In the case of the stitch length of 4, Oram shown in Table 3 showing the pulse train data of this pulse train storage element, the pulse train storage elements 16x and 16y are 500H (hexadecimal) From 53
FH is addressed, and data line Do is '°1''
A pulse train including wo pulses; [) and "0" wo pulses is output to a pulse motor driver (not shown). Since the data information can be arbitrarily set in advance, it is possible to set a pulse sequence suitable for driving the presser foot device.

The feeding time chart in FIG. 3 shows this series of operations.

In the above embodiment, an example was explained in which a 64-byte address space was provided for pulse data for one stitch, but the present invention is not limited to this, and this is due to the capacity of the memory element. For example, 128 bytes or 256 bytes can be made into one stitch. 3. Effect of [shot ψ] As is clear from the above explanation, according to the present invention, the Without using any complicated means, the pulse array 4j can be set arbitrarily by a simple configuration that includes a circuit that outputs pulses corresponding to data of each pattern after retrieving data from the memory element. , it is possible to generate arbitrary pulse sequences including slow up and down, etc., and it can be installed at low cost, so it is extremely effective in practical use1.

[Brief explanation of drawings]

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 embodiment of an automatic sewing machine according to the present invention, and FIG. 3 shows the operation of FIGS. 1 and 2. This is a time chart for explanation. 1°, Sewing machine, 2.00. Detector, 3. . ...Control device, 6.8...X axis, Y axis controller, 7.9---Xtjll, Y axis pulse motor driver, 10.11---X axis, Y axis pulse motor driver 15-
@--Counter, 16x, 16YII...Storage element,
17.18...Feeding pulse train output,) Agent Oiwa mm

Claims (2)

[Claims] (1) Specify the address jI of the storage medium that stores the stitch pattern data by the 1-module and save the stored pattern data b'
1; In a sewing machine equipped with a protruding device 15' and a device that drives the sewing material according to the pattern data by inputting pulse information corresponding to the pattern data, 1) 1j pulses are applied for each stitch length. A pulse array output circuit that stores information in a memory element and outputs a pulse train corresponding to each pattern data from the data head of the memory element by scanning a predetermined atto V range specified by the supplementary pattern data with a counter. That's what we have! Automatic sewing machine with special features. (2) The pulse array output circuit includes a memory element that receives count data from a counter for scanning a predetermined address range specified by the pattern data and stores a pulse train corresponding to the stitch length. niJ:J,”4.74
The automatic sewing machine according to claim 1, characterized in that: i, +.