JPS6343115B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to an automatic sewing machine that moves a presser foot holding a cloth into a shape according to pattern data stored in a memory element such as a PROM, and obtains a seam of a constant shape. The present invention relates to an automatic sewing machine in which the configuration of a pulse array corresponding to a length can be arbitrarily set and selected according to sewing conditions. [Prior Art] An example of a conventional automatic sewing machine is shown schematically in FIG. 1 and will be explained. In the figure, 1 is a sewing machine that forms stitches, 2 is attached to the head of this sewing machine 1, and a needle down position signal, It is a detector that generates a needle top position signal and a predetermined pulse per rotation. 3 is a storage element (not shown) in which pattern data is stored;
The pattern data is read in synchronization with the needle down position signal output from the detector 2, and the feed amount data corresponding to the stitch length 4 _X , 4 _Y and control data such as forward/reverse rotation and start date 5 _X , 5 This control device 3 is a control device that outputs _Y , and this control device 3 is a device that sequentially specifies address lines of a storage medium (not shown) in which stitch pattern data is stored in advance and reads out pattern data stored in the storage medium. It consists of 6 is an X-axis controller that outputs a pulse train of forward rotation or reverse rotation to the X-axis pulse motor driver 7 based on input of feed amount data 4 _X and control data 5 _X from the control device 3; 8 is feed amount data from the control device 3; A Y-axis controller that outputs a forward or reverse pulse train to the Y-axis pulse motor driver 9 based on the input of 4 _Y and control data 5 _Y ;
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, X-axis pulse motor 10, Y-axis controller 8, Y-axis pulse motor driver 9, and Y-axis The combination of the pulse motor 11 constitutes a device that drives the sewing object according to the pattern data by inputting pulses corresponding to the pattern data. Here, the X-axis and Y-axis controllers 6,
8 each have a built-in pulse generator. 12 is an XY table driven by an X-axis pulse motor 10 and a Y-axis pulse motor 11. Note that CW (Clock Wise) in the X-axis and Y-axis pulse motor drivers 7 and 9 refers to input ends where the rotation direction of the X-axis and Y-axis pulse motors 10 and 11 is clockwise (clockwise direction), and CCW (Counter Wise).
Clock Wise) indicates the counterclockwise (counterclockwise) input end, and A, , B, each indicate the output end. In the automatic sewing machine configured as described above, 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, the CPU (not shown) in the control device 3 performs sewing for one stitch from the storage medium in which pattern data is stored in advance. Load the data. Then, the sewing data for one stitch is output to the X-axis and Y-axis controllers 6 and 8 as feed amount data _4X , _4Y and control data _5X , _5Y such as sewing speed and direction. Next, this X with a built-in pulse generator
Axis and Y-axis controllers 6 and 8 send pulses in the forward and _reverse directions set by control data ₅ Quantity data 4
Outputs a pulse train equal to the number of pulses set by _X , 4 and _Y. Then, the X-axis and Y-axis pulse motor drivers 7 and 9 respectively
The coils of the axis and Y-axis pulse motors 10 and 11 are excited, and the respective X-axis and Y-axis pulse motors 10 and 11 are excited.
Rotate. Along with this rotation, a 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. However, an automatic sewing machine configured in this way has the disadvantage that an expensive controller must be used to obtain a pulse train corresponding to the stitch length, making the device itself very expensive. It was hot. Another inexpensive method is to use an element that uses a specific number of pulses output per rotation from the detector and generates a specific 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 sequence or control slow-up-up-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. To provide an automatic sewing machine capable of generating pulse sequences and obtaining different pulse sequences at low cost even for the same stitch length by switching bits according to sewing conditions. In order to achieve such an object, the present invention stores various types of pulse information for the same stitch length in different bits at the same address of a memory element, and by switching the data line, it is possible to store different pulse sequences for the same stitch length. The device is equipped with a pulse array output circuit that outputs a pulse array output circuit. [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 an automatic sewing machine according to the present invention, and shows an example of a pulse train generating circuit corresponding to the stitch length used in the present invention. In FIG. 2, the same reference numerals as in FIG. 1 indicate corresponding parts, and 13 is the control device 3 shown in FIG.
14 is a cloth feed period signal S and clock pulse P which are at "low level" only during the cloth feed period due to this control data 13.
A cloth feed gate circuit 15 outputs a cloth feed gate circuit 14 which counts clock pulses P only when the cloth feed period signal S from the cloth feed gate circuit 14 is at "low level" and has output terminals 1Q _A , 1Q _B , 1Q _C , 1Q _D. ,2Q _A ,2 _B
This is a counter that outputs count data from 0 to 63. In this counter 15, 1 is an input terminal to which the clock pulse P is applied;
R _D is a counter reset input terminal to which the cloth feed period signal S is applied, and 2 is an input terminal to which the output of the output terminal 1Q _D is applied. _{16 _ _ _}
is stored as pulse present and “0” as no pulse,
The above 64 bytes are pulse train storage elements 17 and 18 which are sequentially addressed by the count data from the output terminals 1QA _{to 2QB} of the counter 15 connected to address lines _A0 to _A5 , respectively. There are 18 data lines. 19,2
0 is a changeover switch for switching data lines 17 and 18, and 21 and 22 are switches 19 and 2, respectively.
This is the pulse train output line connected to 0. Next, the operation of the embodiment shown in FIG. 2 will be explained with reference to the table shown below and FIG. 3. First, pattern data for one stitch consisting of X data and Y data is shown in Table 1 below.

[Table] In this first table, the data corresponding to the stitch length shows the case where 5 bits are used as feed amount data, where A indicates control data and B indicates feed amount data. . Also, 4.0mm indicates the stitch length. Pulse train _memory elements ₁₆
The pulse train start addresses (see Figure 2) are shown in Table 2 below.

【table】

[Table] In addition, the pulse train data of the pulse train storage elements _16X and _16Y with stitch lengths near 4.0 mm shown in Table 1 are shown in Table 3 below.

【table】

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the pulse array configuration can be adjusted under sewing conditions by a simple configuration including a pulse array output circuit corresponding to the stitch length without using complicated means. The settings can be arbitrarily selected according to the sewing conditions, and even if the stitch length is the same, different pulse sequences can be obtained by switching the bits according to the sewing conditions, and the device can be realized at low cost. , the practical effect is extremely large.

[Brief explanation of drawings]

Fig. 1 is a block diagram schematically showing an example of a conventional automatic stitching machine, Fig. 2 is a block diagram showing an embodiment of an automatic stitching 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... Detector, 3... Control device, 6, 8... X-axis, Y-axis controller, 7, 9
...X-axis, Y-axis pulse motor driver, 10,1
1...X-axis, Y-axis pulse motor, 15...Counter, _16X , _16Y ...Pulse train storage element, 19,
20... Changeover switch.

Claims (1)

[Scope of Claims] 1. A device for reading out the stored pattern data by sequentially specifying addresses of a storage medium in which stitch pattern data is stored in advance, and pulse information corresponding to the pattern data using the output of this device as input. a device that drives the sewing object according to the pattern data according to the input of the pattern data; and a device that stores the pulse information in a storage element for each stitch length and scans within a predetermined address range specified by the pattern data. In a sewing machine equipped with a device for outputting pulses corresponding to each pattern data from the data line of the memory element,
to different bits at the same address of the memory element,
An automatic sewing machine characterized by being equipped with a pulse array output circuit that stores various types of pulse information for the same stitch length and outputs different pulse arrays for the same stitch length by switching the data line of the memory element. . 2. The pulse array output circuit includes a counter that scans within a predetermined address range specified by pattern data, a memory element that receives the output of this counter as input and stores pulse information on stitch length, and a memory element that stores pulse information on stitch length. 2. The automatic sewing machine according to claim 1, further comprising a switch for selecting and switching data lines.