JPH0657603A - Controller for operation of flat knitting machine - Google Patents

Abstract

PURPOSE:To provide a controller designed so as to control start, stop and speed setting in low speed operation by a rotational operation of a rotary bar and to directly control reset operation of a feeder and speed setting in intermediate or higher speed operation and capable of readily and surely operating a flat knitting machine. CONSTITUTION:In an operation controller 1 of a flat knitting machine 2 for controlling operations such as start, stop and speed control through a rotary encoder 5 attached to the body and a rotational operation of a rotary bar 3 having a switch 4, a direction 8 for reset of a feeder to the starting point is input in the controller 1 to reset the feeder to the starting position and a direction 7 for setting the operation speed of the flat knitting machine 2 is then input in the controller 1 to set the operation speed. When starting to drive the flat knitting machine 2 by giving a rotational operation 6 to the rotary bar 3 after setting the operation speed, the rotational operation 6 of the rotary bar 3 is allowed to control start, stop and speed setting in low speed operation. Reset operation of the feeder to the starting position and speed setting in intermediate or higher speed operation are input directly to the controller 1 without operating the rotary bar 3. Thereby, the flat knitting machine 2 can be readily driven without fail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to operation control of a flat knitting machine.

[0002]

2. Description of the Related Art As an example of the prior art, a photoelectric switch consisting of a light emitting device, a light receiving device and a disk with a slit is attached to the end of a rotary bar provided in the main body, and a rotary encoder is installed at the other end. The start, stop, inching, and return to the origin of the yarn feeding device are performed, and the operating speed / speed control is performed by the rotation angle of the rotary encoder.

[0003]

However, when the photoelectric switch and the rotary encoder are combined for starting, stopping, inching, returning the origin of the yarn feeder and controlling the operating speed, all are processed within one rotation of the operation bar. There is a problem that the rotation angle for each operation cannot be increased. For example, when changing the operating speed, there is a problem that the speed changes greatly with a small rotation angle. Also,
Even when attempting to perform a stop operation, if the rotation angle of the operation bar is increased, there is a risk that the photoelectric switch will pass through the stop position and reach the home position of the yarn feeder.

[0004]

Means for Solving the Problems The above-mentioned problem is in a flat knitting machine for performing operations such as starting, stopping, and operating speed control of a flat knitting machine by rotating a rotary bar having a rotary encoder and a switch provided in the main body, The rotation operation of the rotary bar is to start, stop, and set the speed during low-speed operation, and the origin position return operation of the yarn feeder and the speed setting above the middle speed should be input directly to the control device without going through the operation bar. Is realized by the operation control device of the flat knitting machine.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings showing an embodiment of an operation control device for a flat knitting machine according to the present invention. FIG. 1 is a block diagram showing in principle the operation and control flow of the operation control device for a flat knitting machine of the present invention.

In FIG. 1, 1 is a control device, 2 is a flat knitting machine, 3 is an operation bar, 4 is a limit switch that operates in conjunction with the operation bar, and 5 is a rotary encoder installed at the end of the operation bar. . When starting the operation of the flat knitting machine, the operator first inputs an origin return command 8 to the controller 1 in order to return the yarn feeder to the origin position. As a result, the yarn feeding device (not shown) is returned to the original position. Next, the operator inputs a speed setting command 7 to the control device 1 to set the operating speed of the flat knitting machine. By giving the rotating operation 6 to the operation bar 3, the operation of the flat knitting machine is started. The operation and speed control of the flat knitting machine according to the present invention are performed by a combination of a speed setting command 7, a yarn feeding device origin return command 8 input to the control device 1, a limit switch 4 and a rotary encoder 5 provided on the operation bar 3. Be seen.

FIG. 2 is a view showing the structure of the operation bar 3 installed in the main body of the flat knitting machine. In FIG. 2A, 3 is an operation bar, 4 is a limit switch, 5 is a rotary encoder, 9 is a protrusion for operating the limit switch 4, 11
Is a stopper that is combined with the pin 10 to restrict the movement of the operation bar 3 to one rotation. FIG. 2B shows the position of the operation bar 3 when the flat knitting machine is in a stopped state. Figure 2
(4) shows a state in which the operation bar 3 is rotated to the maximum.
FIG. 2C shows a state in which the operation bar 3 is at the intermediate position. As shown in FIG. 2, there are three types of limit switches, which operate in the order of A, B, and C from the stop position.

FIG. 3 is a drawing showing the rotation angle of the operation bar and the operating condition of the flat knitting machine. In FIG. 3 (1), the flat knitting machine is at the stop position and the rotation angle is 0 degree. From this state, the rotation angle and the operation and control of the flat knitting machine when the operation bar is rotated by about 360 degrees Show the relationship. The operating speed of the flat knitting machine increases in proportion to the rotation angle from the time when the operation bar 3 is rotated from the position shown in FIG. Almost 5
A driving speed of 0% is reached.

When the limit switch C is actuated, after the course currently being knitted is finished, the running speed is changed from the next knitting course to the speed given by the speed setting command 7 in FIG. 1, and then the knitting is continued at this speed. Further, as shown in FIG. 3B, if the operation bar 3 is rotated in the reverse direction before the limit switch C is operated, the operating speed can be reduced.

According to the present invention, the limit switch B operates from the stop position and the rotation angle from the start of operation is sufficiently large so that the operation is not accidentally started. Also, operating speed 0
Since the rotation angle during low speed operation from 50% to 50% can be as large as about 180 degrees, selection of the speed during this period is easy and reliable. Next, a method of changing the operating speed will be described. When changing the operating speed, do not use the operation bar, but set the speed at the desired value directly. When the speed setting command 7 having a desired value is input, the driving speed is changed from the next formation course which is currently being formed. The setting can be performed digitally with any value, and the operation speed can be selected easily and surely at high speed.

Next, the stop operation will be described. The stop operation may be performed by rotating the operation bar in the direction opposite to the operation described above. When the operation bar is rotated in the opposite direction and the limit switch A operates, the flat knitting machine stops. Even in the case of the stop operation, the rotation angle can be made large by the method according to the present invention, and since no other operation is performed in the middle, the stop operation can be performed quickly and reliably.

Since the operation of returning the yarn feeder to the original position is not performed by the operation bar but is directly input to the control device 1, it is not related to the rotation angle of the operation bar 3 and there is no fear of erroneous operation.

[0013]

COMPARATIVE EXAMPLE An example of a conventional knitting machine operation control apparatus will be described with reference to FIGS. 5 and 6. In FIG. 5, 12 is a photoelectric switch, 13 is a rotating disk, 14 is a slit on the rotating disk 13, 15 is a light emitting part, and 16 is a light receiving part. Four slits 14 are provided on the rotating disk 13. The four slits are called U, V, W and X, respectively. When the operation bar 3 is rotated, the rotary disc 13 directly connected to the operation bar 3 also rotates. When the slit 14 provided on the rotary disk 13 comes to a position facing the light emitting portion 15 and the light receiving portion 16 fixedly installed in the photoelectric switch 12, the photoelectric switch outputs a signal corresponding to the type of the slit. To occur. In this comparative example, the slit U is the origin position return signal of the yarn feeder, the slit V is the stop signal of the flat knitting machine, the slit W is the inching signal of the flat knitting machine, and the slit X is the signal for starting the speed control of the flat knitting machine. It is assigned.

Next, the relationship between the operation bar and the signal of each slit will be described with reference to FIGS. FIG. 5B shows the case where the rotation angle of the operation bar 3 is 0 degree. FIG. 6A shows the case where the rotation angle of the operation bar 3 is increased from 0 degrees. When the signal U is generated, the yarn feeder is returned to the origin position. Next, when the signal W is generated, the flat knitting machine starts the inching operation at a certain constant speed. When the rotation angle is further increased and the signal X is generated, the flat knitting machine operates at a speed proportional to the rotation angle. The operation bar 3 is restricted by a stopper at a position of about 360 degrees and does not rotate any more, but the flat knitting machine reaches the maximum speed at this position.

Next, referring to FIG. 6B, the operation bar 3 is set to 360.
The case of rotating in the reverse direction from the degree position will be described. When the operation bar is rotated in the reverse direction, the operating speed of the flat knitting machine decreases in inverse proportion to the rotation angle, and when the signal X is generated, the flat knitting machine enters the inching operation at a constant operating speed. Further operation bar 3
When the signal W is generated, the flat knitting machine is stopped. When the signal U is generated, the yarn feeder is returned to the origin position.

In the flat knitting machine operation control apparatus of the prior art, the origin position return, stop, inching operation, and operation speed control of the yarn feeding device are performed within one rotation of the operation bar 3. Therefore, the rotation angle of the operation bar between each operation unit is small. Therefore, it is necessary to be careful when operating with the operation bar. For example, when the operation bar is stopped during operation, the jogging operation is performed when the rotation angle of the operation bar is small, and the origin position of the yarn feeder is returned when the rotation angle of the operation bar is large. Further, in the jogging operation, the speed cannot be changed by selecting only a constant speed. The selection of the operating speed is also performed in the range of the rotation angle of the operation bar being approximately 180 degrees, and therefore the change of the operating speed with respect to the change of the rotation angle is large.

[0017]

According to the operation control device of the flat knitting machine according to the present invention, the origin position returning operation of the yarn feeder, the stop operation of the flat knitting machine,
Operations such as low-speed operation and medium-high speed operation can be performed easily and reliably.

[Brief description of drawings]

FIG. 1 is a block diagram showing in principle the operation and control flow of an embodiment of an operation control device for a flat knitting machine according to the present invention.

FIG. 2 is a diagram showing a structure of an operation bar 3 installed in a flat knitting machine main body according to an embodiment of the present invention.

FIG. 3 is a diagram showing a rotation angle of an operation bar and an operating condition of a flat knitting machine according to an embodiment of the present invention.

FIG. 4 is a block diagram showing in principle the operation and control flow of an embodiment of an operation control device for a flat knitting machine according to an embodiment of the prior art.

FIG. 5 is a view showing a structure of an operation bar 3 installed in a flat knitting machine body of an example according to a conventional technique.

FIG. 6 is a diagram showing a rotation angle of an operation bar and an operating condition of a flat knitting machine according to an embodiment of the prior art.

[Explanation of symbols]

 1 control device 2 flat knitting machine 3 operation bar 4 limit switch 5 rotary encoder 6 rotation operation 7 speed setting signal 8 yarn feeding device origin return signal 9 protrusion 10 pin 11 stopper 12 photoelectric switch 13 rotating disk 14 slit 15 light emitting unit 16 light receiving Department

Claims (1)

[Claims] 1. A flat knitting machine that performs operations such as starting, stopping, and operation speed control of a flat knitting machine by rotating a rotary bar having a rotary encoder and a switch provided in the main body. The speed setting during stop and low speed operation is performed, and the origin position return operation of the yarn feeder and the speed setting of medium speed or higher are directly input to the control device without using the operation bar. Operation control device.