JPH0148032B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) This invention creates a predetermined sewing pattern by moving a pallet stretched with work cloth in the X and Y directions across the vertical movement path of the needle. This relates to a sewing machine that is capable of sewing.

(Prior Art and Problems to be Solved by the Invention) Conventionally, in a sewing machine that selects a predetermined sewing pattern from among a large number of sewing patterns and performs sewing, an operator stores data corresponding to a palette in a storage device. An external selection device selects and sews.

However, the method described above is extremely complicated when sewing a large number of different types of sewing items, and furthermore, incorrect selection may result in defective products or needle breakage may occur due to collision between the pallet and the needle. There was a drawback.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a storage means for storing data of a plurality of sewing patterns together with the types of sewing patterns; a control means for sewing a plurality of sewing patterns in a predetermined order; a mark provided on each of the pallets to indicate the type of sewing pattern corresponding to the workpiece cloth mounted on the pallet; A detector detects the mark from the supplied pallet and checks whether the type of sewing pattern of the pallet detected by the detector matches the type of sewing pattern of the data to be executed. identification means for identifying and enabling the operation of the control means only when they match.

(Operation) When performing sewing work with the sewing machine of the present invention, first, the sewing order is determined from a plurality of types of sewing patterns, and the order of the pallets is determined accordingly. Next, a pallet corresponding to the sewing order is set on the sewing machine and sewing is performed. At this time, the type of sewing pattern is read from the mark provided on the pallet, and it is determined whether or not it matches the type of sewing pattern planned. If they match, proceed to the sewing process; if they do not match,
After matching the type of sewing pattern with the palette by either changing the order of the sewing patterns or converting the palette, the sewing operation begins.

(Example) Hereinafter, an example embodying the present invention will be described based on the drawings.

Referring to FIGS. 1 and 3, the overall structure of the sewing machine will be described. A sewing machine main body 2 is mounted on a machine base 1, and a table 3 is provided at the front of the machine base 1. At the lower front end of the sewing machine body 2, a needle 4 that carries a needle thread (not shown) and constitutes a stitch forming means together with a hook (not shown) is provided so as to be movable up and down.

In front of the sewing machine main body 2, a pair of support rails 7 are arranged and fixed on both left and right sides of the machine base 1, extending in parallel in the front-rear direction (Y direction). A movable frame 9 having a guide rail 8 extending in the left-right direction (X direction) on the upper surface is supported on the support rail 7 so as to be movable in the Y direction. The movement of the shaft 11 is guided by engagement with gears 12 at both ends of the shaft 11. Guide rail 8 on the moving frame 9
A carriage 13 is supported so as to be movable in the X direction, and a pallet 14 shown in FIG. A work cloth 16 is removably stretched and held on the pallet 14 by means of a holding frame (not shown), and both clamps 1
A marker 17 indicating the sewing pattern of the pallet 14 is placed between the pallets 5 and 5. This marker 17 is composed of four marker pieces 18 whose vertical positions are adjustable, and the pattern of the marker 17 is set by the combination of the vertical positions of these marker pieces 18. Further, a detector 19 is provided on the carriage 13 so as to face the mark 17, and is adapted to read the mark 17.

An X direction feed pulse motor (hereinafter referred to as X motor) 20 is disposed on the machine base 1 in front of the moving frame 9, and as the X motor 20 rotates, gears 21, 22, a spline shaft 23, and the spline shaft are rotated. The carriage 13 is moved in the X direction through a gear (not shown) movable along a gear wheel 23 and a rack 24 extending along the front edge of the carriage 13, and the pallet 14 is fed in the same direction. It's becoming like that. Also, X motor 20
A Y-direction feed pulse motor (hereinafter referred to as Y-motor) 25 is disposed on the machine base 1 in the vicinity of ,
The moving frame 9 is moved in the Y direction, and the pallet 14 is fed in the same direction.

Next, the control device of this embodiment will be explained based on FIG. 2. A central processing unit (hereinafter referred to as CPU) 30 as a control means includes a sewing data memory 3.
1, input interface 32, output interface 33, floppy disk interface 34,
Program interfaces 35 are connected to each, through which the CPU 30 controls peripheral devices.

In the sewing data memory 31 as a storage means,
Data for a plurality of sewing patterns is stored.
As shown in Fig. 4, the format of the pattern data is such that one stitch is expressed in two bytes, and the amount of movement information in the X and Y directions is expressed in one byte each. 6 bits are used as the amount of movement of the carriage 13 in the X or Y direction, 1 bit is used as a sign bit 36, and the remaining 1 bit is used as a flag bit 37. The sign bit 36 indicates the moving direction of the X-axis and the Y-axis, and the flag bit 37 indicates the attribute of the data.Based on this, the CPU 30
Determine whether to perform the movement.

The input interface 32 includes the detector 19,
Various switches 39 for operating the sewing machine, a detector 40 for controlling the needle stop position, and an encoder 41 used for controlling the speed of the sewing machine motor are connected. The various switches 39 include a starting switch for starting a sewing machine motor 47 for vertically moving the needle 4 in a program creation mode to be described later;
It is composed of a group of switches such as switches for arbitrarily driving the motor 20 and Y motor 25, a change switch, a read switch, etc., which will be described later.

The output interface 33 includes an X motor drive device 42 that drives and controls the X motor 20 and a Y motor drive device 4 that drives and controls the Y motor 25.
3. A sewing machine motor control device 46 that drives and controls the sewing machine motor 47 and a display section 45 that displays sewing data that is being executed are connected.

A floppy disk device 48 is connected to the floppy disk interface 34.

A program creation device 55 is connected to the program interface 35 . In the program creation mode in which this program creation device 55 is operated, the sewing machine main body and the carriage 1 can be arbitrarily controlled by operating the start switch in the various switches 39 and the switches for the X and Y motors.
3 to perform a predetermined sewing operation, and data associated with the driving is stored in the floppy disk device 48. Further, the execution order of various sewing patterns read from the floppy disk device 48 can be changed by operating a change switch or the like in the various switches 39.

Sewing data of groups A and B2 are stored in the floppy disk of the floppy disk device 48, and group A includes several sewing patterns A1 and A.
2, A3, . . . Group B consists of several sewing patterns B1, B2, B3, . and,
The data of sewing patterns A1, A2, A3, ... are stored in the A range of the floppy disk, and the data of sewing pattern B is stored in the A range of the floppy disk.
Data 1, B2, B3, . . . are respectively stored in the B range of the floppy disk. Then, each sewing pattern is transferred to each table to be described later based on a command from the CPU 30.

Now, the operation of the sewing machine pattern discriminating device configured as described above will be explained. It is assumed that the main program for performing the sewing work of the sewing machine is already stored in the memory.

First, the operation of storing the data of each sewing pattern stored on the floppy disk in the sewing data memory 31 will be explained based on FIGS. 5 to 7. The flowchart shown in FIG. 5 proceeds under the control of the CPU 30, and in step S1 of this flowchart, it is determined whether or not the read switch in the various switches 39 has been pressed, and if it has been pressed, the step S1 is executed. Proceed to S2. Step S2,
In S3, the data in range A and range B on the floppy disk are read and stored in the sewing data memory 31. And step S
In step 4, it is determined whether or not there is a mark code that guarantees that the data read in steps S2 and S3 is regular data. If there is a mark code, the process proceeds to step S6; if there is no mark code, the process proceeds to step S5. move on. Then, in step S5, the data is treated as defective and error processing is performed. Also,
In step S6, a data validity flag is set for the regular data. In step S7, a data table and a job table are created.

This data table 51 and job table 5
2 will be explained based on FIGS. 6 and 7. As shown in FIG. 6, in the data table 51, 6 bytes of memory is allocated for each sewing pattern, and sewing data A1, A2, A3, B1, B2, and B3 are stored in this order, and the sewing data shown in FIG. Calculation is performed from the contents of , and based on the calculation result, the first address of the address, the first
The X coordinate position of the stitch and the Y coordinate position of the first stitch are stored in that order.

As shown in FIG. 7, the job table 52 contains addresses (hereinafter referred to as start address pointers) containing the start addresses of the sewing pattern data A1, A2, A3, B1, B2, and B3 of the data table 51. Immediately after data is read, it is stored in the determined sewing order. The order is JBTBL+O, JBTBL+4, JBTBL+
8, the range A sewing pattern is A1, A2, A1, A2,
Store A3 in order, JBTBL+2, JBTBL+
6. Sewing pattern B of range B in the order of JBTB+10
1, B2, and B3 are stored in order. Then, sewing is performed in the order of the addresses in the job table 52. Further, in this job table 52, the order of data for each range can be changed. That is, each time the change switch in the various switches 39 is pressed once, sewing patterns A1, A2, A3, ..., B1, B2, etc. are changed in ranges A and B.
B3, . . . are moved down one by one, and the order within ranges A and B is changed. Also, changes within ranges A and B are made using separate switches.

Next, the sewing operation will be explained based on the flowchart shown in FIG. Two types of pallets 14 are prepared according to the number of ranges mentioned above (that is, the number of pallets 17
There are two types). In step S10, it is determined whether the starting switch is on or not. If it is on, the process proceeds to the next step S12, and if not, a process is performed in which sewing is not performed in step S11. In step S12, it is checked whether the valid flag is set in the flag bit 37.
If it has not been set, error processing is performed on the sewing data in step S13. If it has been set, the process advances to step S14, where the start address pointer in the job table 52 is determined based on the data in the execution table, and the contents of the data table 51 indicated by the start address pointer are sequentially retrieved. In step S15, it is determined where in the job table 52 the data is located by the start address pointer, and a range number 53 indicating range A or B is calculated. In other words, the pallet numbers indicated by the markers 17 can be compared.

In step S16, the detector 19 detects the marker 17.
Read and store it in the buffer area as a palette number. In step S17, it is determined whether the palette number and the range number are the same number. If they are the same, the process advances to step S19; if they are different, error processing is performed in step S18, and an error display is displayed on the display section 45. Next, in step S29, it is determined whether the change switch in the various switches 39 has been pressed or whether the pallet 14 has been replaced. In this case, when the change switch is pressed, data A1 and A in ranges A and B are
2, A3,..., B1, B2, B3,... are scrolled one by one. If the determination result in step S29 becomes YES, the error display is erased in step S30, and then step S12 is performed.
to return to.

In this way, it is determined in steps S12 to S17 whether the sewing pattern can be executed. If it is executable, the process advances to step S19, and if it is not executable, data change or pallet exchange is awaited in step S29.

In S19, the content of the data table 51 in which sewing pattern data is stored is read using the address pointer of the job table 52, and the position of the first stitch is determined. Then, in step S20, the start address of the sewing data from the second stitch onward is set. In step S21, the sewing machine 13 moves to the position of the first stitch, and in step S22, rotation of the sewing machine motor 47 is started.

The carriage 13 is repeatedly driven in a loop of steps S23 and S24 until one sewing pattern data is completed, and at the same time as the sewing pattern data is completed, the process moves to step S25 and the rotation of the sewing machine motor 47 is stopped. After the sewing is finished, step S26
The thread is cut at step S27, and the carriage 13 is returned to the origin. In step S28, the execution table is updated, the next pattern to be sewn is prepared, and the sewing of one sewing pattern is completed.

As described above, if one palette is made to correspond to range A and the other pallet is made to correspond to range B, when sewing of sewing pattern A1 is completed on one palette, sewing pattern B1 will be sewn on the other palette. Be able to sew. Furthermore, when the former pallet is loaded next, sewing pattern A2, which is different from A1, can be sewn, and the two types of pallets can be used to sew A1, B1, A2, B2, A3, B3,...
Various types of sewing can be done in this order. Of course, it is also possible to prepare pallets with different markings 17 as many as the number of sewing patterns. If the set pallet 14 and the data of the sewing pattern to be executed do not match, sewing becomes impossible, and if they match, sewing becomes possible.

Effects of the Invention As exemplified in the embodiments above, in this invention, sewing is not performed when the sewing pattern data to be executed and the pallet do not match, so it is possible to prevent the occurrence of defective products and needle breakage. It has this excellent effect.

[Brief explanation of drawings]

The drawings show an embodiment embodying the present invention, and FIG. 1 is a perspective view of a sewing machine, FIG. 2 is a block diagram of a control device, and FIG. 3 is a perspective view showing a detector, a marker, and a pallet. Fig. 4 is an explanatory diagram showing the bit structure of sewing data, Fig. 5 is a flowchart when reading sewing data from a floppy disk, Fig. 6 is an explanatory diagram showing the structure of the data table, and Fig. 7 is an explanatory diagram of the job table. FIG. 8, which is an explanatory diagram showing the configuration, is a basic flowchart regarding sewing. In the figure, 4 is a needle, 14 is a pallet, 16 is a processing cloth, 17 is a label, 19 is a detector, 30 is a CPU,
31 is a sewing data memory.

Claims (1)

[Scope of Claims] 1. A plurality of pallets 14 each having a stretched work cloth 16 are selectively mounted, and the mounted pallets 14 cross the vertical movement path of the needle 4 in the X direction and the Y direction.
A sewing machine capable of sewing a predetermined sewing pattern by being moved in a direction includes a storage means 31 for storing data of a plurality of sewing patterns together with types of sewing patterns, and a plurality of sewing patterns stored in the storage means 31. Control means 30 for sewing patterns in a predetermined order
, a mark 17 provided on each pallet 14 to indicate the type of sewing pattern corresponding to the workpiece cloth 16 mounted on the pallet 14; and detecting the mark 17 from the pallet 14 supplied to the sewing machine. a detector 19 that detects the pallet 1 detected by the detector 19
The present invention further comprises an identifying means 30 for identifying whether or not the type of sewing pattern No. 4 matches the type of sewing pattern of the data to be executed, and for enabling the operation of the control means 30 only when they match. A sewing machine featuring: 2. The sewing machine according to claim 1, wherein the control means 30 can arbitrarily instruct the sewing order of a plurality of sewing patterns.