JPS6122884A - Controller of cloth feed amount in 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 [Industrial Field of Application] The present inventor relates to a control device for controlling the amount of cloth feed in a set-stitch sewing machine.

[Prior art]

Traditionally, in the method where two pieces of cloth are sewn together,
As shown in the figure, there is a technique called ise-komi stitching in which fabrics A and B with different lengths on the top and bottom are sewn to the same length. There is a moving sewing machine. In order to operate this vertical differential feed sewing machine, the amount of cutting is set in advance,
During the sewing process, the sewing method uses a method in which the sewing force is 1 with the same amount of cutting depth, and a method in which the sewing amount is adjusted while sewing with the leno (-) or pedal, or a method in which the sewing force is adjusted according to the number of stitches. There is a method in which the amount of stitching is programmed to obtain the same sewing conditions, and a method in which the amount of creasing is calculated and corrected by trial sewing, as shown in Japanese Patent Laid-Open No. 57-72692.

When the differential amount of cloth feed is adjusted by hand or foot operation to perform uneven stitching, the operator must rely on his experience and intuition, and it is not possible to obtain a product of consistent quality. There is a drawback. In the method in which the differential amount of feed is controlled by a program, it also takes a long time to set the program for various sewing products, and it takes a long time to determine whether the program is the optimal one. A large amount of money and time is required, and the cam type in particular has the drawback of increasing manufacturing costs. Furthermore, even if the error is measured on the sample through trial sewing and calculations are made to correct it, even if the method requires an appropriate amount of differential, in reality, the amount of unevenness changes slightly during the sewing process. There was a problem that it would not be suitable in some cases.

[Summary of the invention]

This invention has been made to overcome all of these drawbacks, and is capable of detecting the amount of change in cloth feed according to the number of cloth needles or the amount of cloth movement, and is provided with a temporary or permanent function or both functions. The material is recorded and played back, and the amount of material fed by the material feeding means can be operated or automatically changed at any time, without the need for trial sewing or the long experience and intuition of experts. The present invention also proposes a control device for the amount of cloth feed in an offset stitch sewing machine, which controls the amount of cloth feed and allows the production of high-quality, offset stitched products at low cost.

[Embodiments of the invention]

FIG. 2 shows a vertical differential feed mechanism, which is a cloth feed means of a cloth feed amount control device of an embossed stitch sewing machine according to an embodiment of the present invention, an actuator for controlling the drive of this feed mechanism, and a drive source switch. FIG. 4 is a perspective view showing a part of the mechanism, FIG. 3 is a sectional view of the same part, and FIG. 4 is an embodiment of the present invention. The fifth figure is an explanatory diagram showing the control system of the cloth feed amount control device of the set stitch sewing machine. An eccentric cam 5 that controls the movement of the lower feed dog 6 disposed below 3 and an eccentric cam 7 that controls the movement of the upper feed foot (not shown) are fixed, and this main shaft A pulley 101 whose rotation is transmitted to the main shaft 2 is fixed to the end of the sewing machine 2, and a driving force for machine sewing is transmitted by a bell 112.

Regarding the upper and lower differential feed mechanism, see Japanese Patent Publication No. 55-372.
75 etc. will be referred to, so the details will be omitted.

Inside the pulley 101, there is a speed detector 102 for detecting the rotational speed of the main shaft 20. a, and a needle position detector 102 for detecting the operating position of the needle bar 8 driven by the main shaft 2. The upper feed shaft 38 is regulated and rotated by the movement of the eccentric cam 7 and a square piece 39 connected to the rotating body 14 and the link 40. Main shaft 2 (supported so that it can rotate in parallel.

An arm 9 is provided on the lever shaft 8 at the rear of the sewing machine 1, and the arm 9 regulates the amount of movement of the lower feed υ tooth 6.

A spline shaft 120 is fixed to the left end of the L' bar shaft 8, and is engaged with a spline portion 125a at the right end of a transmission shaft 125, and the transmission shaft 125 is rotated in synchronization with the lever shaft 8 via the spline shaft 120-. . The transmission shaft 125 is normally pressed to the left by the spring 122. A portion of the left side of the transmission shaft 125 is a spline shaft 125b, and when pressed by the spring 122, the spline portion 1 provided on the conversion lever 10 and corresponding to the spline shaft 125b is formed on the left side of the transmission shaft 125.
0a so that torque can be transmitted to the °C transmission shaft 125 by actuation of the conversion lever IO. A spur gear 181 is coaxially attached to the transmission shaft 125 adjacent to the conversion lever lO, and the inside thereof is a spline portion 18]a, and when the transmission shaft 125 is pressed by the spring 122, the spline ! l! 1125b and is left in a free state.

The rotating body 14 has the same axis center as the transmission shaft 125, and
1) so that it can rotate and is restricted in the axial direction. An arm portion (14-b) is fixed to the rotating body 14 so as to protrude in the same direction as the arm 9, and a square piece 39 has a function of regulating the amount of rotation of the upper feed shaft 33 via a link 40 at the other end. Given.

The rotating body 14 has both ends locked to a spring receiver 15 fixed to the transmission shaft 125 and a rotating mechanism in contact with the rotating body 14, and the coiled middle part is supported by an elastic body 16 that is loosely fitted to the transmission shaft 125. , the engaging portion 14a is always connected to the adjustment shaft 11 by the rotating mechanism.
Rotating force is applied to the rotating body 14 in a counterclockwise direction when viewed from the left so that the rotating body 14 is pressed into contact with the converting lever 1.0',
Even when the transmission shaft 125 is rotated counterclockwise, the retaining portion 14a and the adjustment shaft 11 remain engaged, and the rotating body 14
are provided so that they can be rotated in the same direction.

Note that the rotating body 14 and the engaging portion 14a are engaged with each other by the spline shaft 14e when the spring 122 is pressed.

A retaining portion 14 is provided on the outer periphery of the rotating body 14. A spur gear 127 is installed adjacent to the spur gear 127, and the shaft side is a spline shaft L4eK, and like the spur gear 13], it is always in an idling state. Spur gears 14d are provided on the rotating body 14 and the spline shaft 120, respectively.

120a is fixed, and the spur gears 12 are meshed with each other.
6.128, the amount of rotation of the rotating body 14 and the lever shaft 80 is detected by the potentiometers 124b and 124a fixed respectively.

On the other hand, spur gears 1-28. meshed with spur gears 127 and 181. l 32 is the axis 129. ．． It is connected to motors 135 and 134, which are actuators, via 18B. A solenoid 1 is located at the left end of the transmission shaft 125.
36 is engaged so that the transmission shaft 125 is pressed to the right against the spring 122.

FIG. 4 is an explanatory diagram illustrating the installation positions of the detection device, drive device, and control device of the cloth feed amount control device for the sew-in stitch sewing machine which is an embodiment of the present invention, and l indicates the top and bottom. Differential feed sewing machine, 109 is reverse stitch switch, 11
2 is a sewing machine motor, IIT is a sewing machine control device, 110
, 118 is a foot-operated pedal for operating the sewing machine (running, stopping, and changing gears), and 114 is an offset amount control pedal operated via a link 17 secured to the arm 14a that rotates the rotating body 14ffi. be. In this invention, 220 is a setting switch for performing each control, a display,
This is an operation panel equipped with a 70Tabidis 2, which is a recording device.

FIG. 5 is a block diagram showing a control device for controlling the amount of cloth feed in a set-stitch sewing machine according to an embodiment of the present invention.

Having completed the configuration, the operation will be described below.

First, when the power switch 222 is turned on, the central control unit (hereinafter referred to as CPU 5) 230 and the read-only memory (
Hereinafter referred to as ROM')) 282 sets the device to an initial state. In the initial state, in FIGS. 2 and 8, the motor 134° 185 and the solenoid 186 are in the OFF state, the transmission shaft 125, which is also suppressed by the spring 122, is moved to the left, and the conversion lever IO and the lever are in the OFF state. The shaft 8 is connected via spline shafts 125b and 125a, and the movement of the conversion lever 10 causes the lever shaft 8 to be driven. At this time, the sedge line part I B l of 131
a is not engaged with the spline 125a of the transmission shaft 125, the spur gear 181.1 (12, gear shaft 1
38. The drive motor ld4, which is an actuator, is separated from the transmission shaft 125 and has no relation to the movement of the lever shaft 8. On the other hand, the rotating body 14 is also
Since the shaft portion 14e is separated from the shaft 127a, the spur gears 127, 128, shaft 129, and motor 185 are independent of the movement of the rotating body 14.

The spline portion 14e of the rotating body 14 is interlocked with the sedge line portion of the retaining portion 14-a, so that it is interlocked with the pedal movement 114 shown in FIG. 4.

Connection shaft 17. For example, when the pedal 114 is depressed downward, the °C rotation body 14 is rotated clockwise when viewed from the right through the arm portion 14b, and is rotated through the link 40 and the square piece 89 to the upper feed 9 shaft 88. The amount of rotation is reduced, and at this time the maximum value of the amount of distortion is regulated.

Adjustment knob 1 described in Japanese Patent Publication No. 55-37275
B. It is also possible to control the movement of the pedal 114, that is, the amount of distortion, by the adjustment shaft 11.

In this way, the conversion lever lO and the foot pedal 114
The amount of movement of the conversion lever shaft 8 and the rotating body 14 operated by the converter lever shaft 8 and the rotating body 14 are determined by analog values obtained by potentiometers 124a and 124b, which are detectors coupled to each, to A/D converters 284a and 284b. The movement amount information is stored in a random access memory (hereinafter referred to as AM) each time the sewing machine makes one revolution, that is, each time the needle bar reaches a specific position by the needle position detector 102a.
The amount written to the memory is limited by the capacity of the RAM, but it is set to 5 so that several processes can be stored, with one process being defined as the end of thread cutting. A recording number is displayed on the display 225 for each step, and when the storage capacity is full, a blinking display indicates IF (5). If you wish to permanently preserve any of the recorded steps, you can transfer them to the floppy disk 226 along with the label code by operating the selection key 221 or the like.

In order to reproduce the false information stored in this way, first, among the switches 222, 228, and 224, switch 223 is switched to manual color or auto, and then the solenoid 186 is energized according to a preprogrammed sequence. , the transmission shaft 125 is the spring 1
It is moved to the right against the pressure of 22. At this time, the motors 184 and 185 perform a slight rocking motion, and the transmission shaft 125
The spline shaft 125b of the rotating body 14, the spline shaft 1 of the rotating body 14
4e has the function of assisting in smooth insertion into the spline portions of the spur gears 181 and 127, respectively. When the transmission shaft 125 is fully shifted to the right, the conversion lever lO and the engaging portion 14a are released from the spline engagement and are connected to the retaining portion 14a. The pedal 114 and the conversion lever 10 are made independent of the rotating body 14 and the lever shaft 8, respectively, and are connected to spur gears 127, 128 and 181, 1, respectively.
The lever shaft 81 and the rotating body 14 are operated by the motor 134° 185 linked to the lever shaft 82. Next, when a necessary process is called up using the selection key 221 on the operation panel 220, the motors 184 and 185 are started, and the shiver shaft 8 and rotation shaft 14 are connected to the previously memorized detector 12.
4a.

It is rotated to the position 24b and initial settings are made.

Next, when the pedal ita'l is depressed, the sewing machine is rotated, and with each rotation, the needle position detector 102a detects the number of needles, the sew amount detector 124b corresponding to the number of stitches, and the feed amount detector 12.
4a is retrieved from the RAM 281, the motors 185 and 184 are operated so that the position information corresponds to the recorded position, and the rotational positions of the lever shaft 8 and the rotating body 14 correspond to the number of stitches, and the positions are reproduced. Ru. Naturally, floppy disk 2
It is also possible to transfer the process information stored in 261C to the RAM 231 again and reproduce it. Here, the amount of depression of the sewing machine drive pedal 118 is recorded, but no reproduction means is taken. The operator may not be able to perform both recording and playback at the same time, and due to differences in skill, each person may need a sewing machine speed that suits them. By comparing the amount of depression of
ROM28.2. It is calculated by the CPU 280 and output correction is performed.

As described above, in this invention, the amount of cloth feeding movement of the upper feeding leg is adjusted as needed by manipulating the hands, feet, knees, etc.
Even if sagging stitches are performed in the middle of sewing, or when sewing is performed by changing the sagging amount while sew- ing is being performed, the sewing machine can be sewn while it is running, and at the same time the gains can be made by the operation. The increase/decrease in the amount of stroke is detected, and the amount of control information for each stitch is) l, AM282
This temporary record can be written into the 70-
Since the data can be transferred to a permanent recording medium such as a HDD (hereinafter referred to as FD), for example, when a skilled worker produces a product of good quality during sewing work,
The in-depth know-how can be recorded instantly. If this recorded content is to be reproduced, by setting simple switches, the actuator that replaces the above can be used without the operator having to operate to increase or decrease the amount of strain. It operates based on the stored contents, and cloth feeding control is performed only by the functional operation control system.

In this way, since the storage/reproduction device is equipped with both temporary and permanent functions, this memory can be reproduced without the need for complicated operations by the operator.
The sewing machine rotates and stops, and by simply operating the pedals and handling the fabric, it is possible to create products of the same three qualities at any speed. Furthermore, during sewing, the sewing machine may be temporarily stopped to move or rotate the fabric, and these operations can also be recorded in accordance with the number of stitches. , it goes without saying that it can also be played back. During recording and playback, the operating mechanism and automatic drive mechanism are connected and separated, so during manual operation there is no need to move the actuator together, and during automatic control the operating mechanism does not operate. Since the actuator trap is not operated, the load burden on the actuator trap is small (and when more advanced control is performed, there are fewer mechanisms that are operated together, so work hazards can be prevented.

〔Effect of the invention〕

As explained above, the present invention detects the amount of change in cloth feed in accordance with the number of cloth needles or the amount of cloth movement, temporarily or permanently, or has both of these functions, and records and reproduces the cloth. Since the amount of cloth feed by the feed means can be changed at any time or automatically, the amount of cloth feed can be controlled and high-quality criss-cross stitching can be efficiently performed.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view showing the slant stitch, Fig. 2 is a perspective view showing a control device for the amount of cloth feed in a sset stitch sewing machine which is an embodiment of the present invention, and Fig. 3 is a cross section of the same part. 4 are explanatory diagrams showing the control system, and FIG. 5 is an explanatory diagram of the signal conversion system. In the figure, l is a vertical differential feed sewing machine, 4 is an upper feed tooth,
6 is a lower feed dog, 102 is a speed detector, 102a is a needle position detector, 124a is a potentiometer, 124b is a potentiometer, 114 is a motor, 186 is a motor, 186 is a solenoid, 225 is an indicator, 226 is a floppy disk, 280 is the central processing control unit, 281
2 is a random access memory, and 232 is a read-only memory. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] A drive mechanism whose drive and stop can be controlled as desired by manual operation, and a drive mechanism that can be operated in conjunction with the drive mechanism to transport two pieces of cloth stacked one above the other by different movement amounts each time one stitch is formed. an operating mechanism that can be manually operated to change the operation of the cloth feeding means;
A selection switch that allows you to select one of the modes, and 1
a detection means that detects the amount of movement of each cloth each time a stitch is formed and generates a signal corresponding to the amount of movement; a storage device that stores the detection signal from the detection means in the first mode as cloth feeding information; and a second mode. A reading device for reading out and outputting information stored in the storage device related to the drive of the drive mechanism, and an operating means are separated and connected independently to the cloth feeding means, and read from the storage device so as to change the amount of cloth feeding. A control device for controlling the amount of cloth feed in a set-stitch sewing machine, which is equipped with an actuator that operates based on information.