JPS5988195A - Quilting apparatus - 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 The present invention sequentially converts stitch patterns drawn in advance on a program sheet such as paper into electrical signals, stores this as two-dimensional displacement information in a storage circuit, and then The present invention provides a quilting device having a novel configuration that can reproduce the formation of a stitch pattern by appropriately reading out the stored two-dimensional information.

A quilting device that automatically forms a seam pattern on the fabric is based on the amount of fabric feed (the amount of movement of the fabric in the Y direction) relative to the displacement (the amount of movement of the fabric in the X direction) K of the fabric.
There are already known devices that can control the speed by a combination mechanism such as a cam means and a ratchet means.

However, with such a device, it is troublesome to replace the cam means every time the fabric has a different runout, and if the stitch pattern is complex, it cannot be expected to adjust the stitch pinch with accurate accuracy. At present, there is a strong desire for improvement in this respect.

Therefore, the quilting device of the present invention is an ideal solution to such problems, and it reads stitch patterns arbitrarily drawn on a program sheet such as paper by hand or the like in advance. This stitch pattern is stored in the memory circuit as two-dimensional displacement information in the x and The object of the present invention is to provide a quilting device having a novel configuration as described above.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a system diagram showing the flow of control of the apparatus of the present invention.

Reference numeral 1 denotes a stitch pattern reading device that converts a stitch pattern drawn in advance by hand or the like on a program sheet into an electrical signal and reads it. 2 is this reader I
This is a servo control drive mechanism that reciprocates the cloth reciprocating machine groove 5 by an amount corresponding to the displacement amount when the displacement amount in the X direction of the stitch pattern read by Vc and stored in the memory circuit 9 is read out again. . 3 is a differential speed reduction mechanism which inputs the displacement amount in the X direction as a correction input when the displacement amount in the X direction of the stitch pattern read by the reading device 1 and stored in the storage circuit 9 is read out again; The differential speed reduction mechanism 3 inputs the prime mover output, which is input through an intermittent operation mechanism (not shown) only during the ascending process of the sewing needle, in the form of an intermittent rotational output.
This input is decelerated by the correction input described above, and the amount of cloth speed in the Y-axis direction is transmitted to the cloth feeding means 4.

This is shown as a line diagram.

The stitch pattern reading device 1 inputs a program sheet 6 on which a stitch pattern A is drawn at regular intervals, and reads the program sheet 6 drawn on the program sheet 6 by a light detection means such as a photodiode play. Reading the stitch pattern.

This reading begins with the reading of the control command signal drawn on the program sheet 6, and is started by light detection means such as a photodiode array arranged in the width direction of the program sheet 6, and the program sheet 6 is fed and The amount of displacement of the stitch pattern in the X direction is detected in synchronization with time.

X of the stitch pattern read by this reading device 1
In particular, in the block diagram shown in FIG. 2, the amount of displacement in the direction is divided into a machine control system that is directly input to the servo control drive mechanism 2, which will be described later, and a storage control system that is stored in the storage circuit 9 via the control circuit 7. The selection of the control systems is performed either alternatively or simultaneously using command switches on the operation table 13.

First, we will explain the copying control. That is, while the stitch pattern A drawn on the program sheet 6 is read by the above-mentioned reading device, the direction of the read stitch pattern is The amount of displacement is input as a control signal to the servo control drive mechanism 2, which moves the cloth reciprocating machine groove 5 left and right to reciprocate the cloth so as to follow the stitch pattern A drawn on the program sheet 6. At the same time, the above-mentioned reading device 1 reads the displacement of the stitch pattern in the Y direction, inputs a correction input according to the amount of displacement to the differential speed reduction mechanism 3, and the stitch pattern is read by the differential speed reduction mechanism 3. An intermittent rotational output corresponding to the amount of displacement in the Y direction is transmitted to cloth feeding means such as a cloth feeding roller to form the stitch pattern drawn on the program sheet 6 described above.

To form a seam pattern on the fabric, the left and right movements of the fabric (movement in the X direction) and the feed operation (movement in the Y direction) are necessary to remove the sewing needle from the fabric and position it above the surface of the fabric. Therefore, in each sewing process, the servo control drive mechanism 2 completes the above-mentioned control within the time it takes for the sewing needle to detach from the fabric surface and descend to the fabric surface again. The sewing needle upper and lower limit position detection means 16, which is composed of a microswitch, a photoswitch, etc., for detecting the position of the sewing needle sends a detection signal to the control circuit 7, activates the stop command circuit 17, and activates the servo control drive mechanism 2. It is possible to forcefully stop the operation.

However, in the differential speed reduction mechanism 3, the input is intermittently sent from the prime mover 14 via the intermittent drive mechanism 18 only when the sewing needle is in the ascending process, so such a means is not provided. stomach.

The servo control drive mechanism 3 is constructed by combining known control means such as a pulse cylinder that is operated with a control output according to the amount of displacement in the X direction read by the reading device 1. The cloth feed rotation intermittent output that defines the cloth feed amount of the cloth feed means 4 such as a feed roller is generated by one reading roller of the program sheet 6 so as to be synchronized with the reading reverse operation of the program sheet 6 to the stitch pattern reading device 1. are connected to each other by means such as a belt pulley.

The differential speed reduction mechanism 3 has a configuration as shown in FIG. In other words, this mechanism 3 includes a transmission mechanism 41 that changes the rotational input of the prime mover 140, which is input by decelerating the rotational output of the prime mover 140 through the intermittent drive mechanism 18, into three stages only when the sewing needle is raised, and this transmission mechanism. The differential gear reduction mechanism 42 includes a spur gear 35 that is meshed with the spur gear 21 fixed to the output shaft 19 of the transmission mechanism 41. is rotatably supported on its output shaft 33, and this spur gear 35
A bevel gear 36 is fixedly integrated with the bevel gear 36. Further, a correction input bevel gear 37 having a worm wheel 39 integrally connected thereto is rotatably supported on this output shaft 33, and furthermore, both ends of an orthogonal support shaft 33a fixed to this output shaft 33 or a planetary bevel The gears 38 and 38 are meshed with the bevel gears 36 and 37 described above.

The three worm wheels Yc mentioned above are meshed with the worm 41 fixed to the output shaft of the pulse motor 40, and the three worm wheels Yc of the stitch pattern A drawn on the program sheet 6 described above are connected to the pulse motor 40Fi. Forward/reverse control is performed according to the amount of displacement in the direction, and the differential gear reduction mechanism 41 described above provides correction input necessary to give the feed amount according to the stitch pattern A that cannot be drawn on the program sheet 6. ing.

The preset adjuster 18 that adjusts the correction input to the pulse motor 40 is used to compensate for deviations in the control of the stitch pitch formed on the fabric, and is equipped with a frequency dividing circuit or the like that increases or decreases the control pulse of the pulse smoke 40. It is made up of.

Next, to explain the storage control system, the storage circuit 9 is the displacement reading inverse circuit 1]1? :Therefore, it is used to store the displacement amount of the stitch pattern A read in the X and Y directions. It is composed of ROM or RAM, and the operation panel 1
By selectively operating the storage command switch 3 (not shown), the displacement amounts are stored one after another as two-dimensional information.

The two-dimensional information constituting the stitch pattern A stored in the memory circuit 9 can be read out by selectively operating a read command switch (not shown) on the operation panel 13. The switching circuit 10 is activated to switch to memory read control.

Thus, when the control circuit 7 is activated, the comparator circuit 9 compares the information in the memory circuit 9 with the information detected by feeding the program sheet 6, thereby performing control based on the same principle as the machine control described above.

Since the device of the present invention has the above-described configuration, any stitch pattern A drawn on the program sheet 6 can be decomposed into displacement amounts in the x and y directions by the stitch pattern reading device l. After being read, the data is stored in the storage circuit 9 as two-dimensional information in the X and Y directions.

Therefore, the information necessary for forming the stitch pattern can be stored in the storage circuit 9 of the stitch lever, and once stored, it can be read out and reproduced as appropriate, which is extremely advantageous.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic control principle of the device of the present invention;
FIG. 2 is a block diagram showing the main part configuration of the device of the present invention, and FIG. 3 is a diagram showing the schematic configuration of the differential speed reduction mechanism. (Explanation of symbols) l... Stitch pattern reading device 2... Servo drive control mechanism 3... Differential deceleration mechanism 4... Cloth speeding means 5... Fabric moving mechanism 14... Power plant patent applicant: Quinlite Denshi Seiko Co., Ltd. Agent: Patent attorney Takashi Suzue - Procedural amendment 1. Display of the case Quilting device 3, person making the amendment Relationship to the case Patent applicant Quinlite Denshi Seiko Co., Ltd. 4, agent 5, date of amendment order

Claims (1)

[Claims] A stitch pattern reading device that sequentially converts stitch patterns drawn on a program sheet such as paper into electrical signals and reads them as two-dimensional displacement information in the X and Y directions. , the above X read by this reading device. A memory circuit configured to store displacement information in the Y direction, and a memory circuit configured to store displacement information in the Y direction;
A servo control drive mechanism that reciprocates the fabric moving mechanism by reading displacement information in the direction, and Y of the two-dimensional displacement information read from the storage circuit.
By reading out the displacement information in the direction, the rotational output of the prime mover is decelerated and corrected for the intermittent rotational output that is output only when the sewing needle is in the ascending process, and the corrected output drives the cloth feeding means such as the cloth feeding roller. A quilting device comprising a differential speed reduction mechanism.