JPS6340257Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention relates to an operation display device for a material supply device, in which a coiled material on a rotary table is unwound while rotating the rotary table and is supplied to a press machine. In this material supply device, the operating status is displayed using a light emitting device on the control head.

(Prior art) As a material supply device that automatically supplies coiled material to a press machine, a rotary table on which the coiled material is placed is provided on a base, and a support provided on the base is provided. A swinging arm is mounted on the control head at the upper end and has a guide roller for guiding the material unwound from the rotary table and fed to the press machine. There has already been provided a device in which a detector is installed in the control head portion to detect the swinging of the swinging arm and to control the motor for driving the rotary table.

This is because when the material is pulled according to the speed of the press, the swing arm swings, which is detected by a detector and the rotation speed of the rotary table is controlled to match the tension speed. However, in the past, only automatic control was performed and the operating status was not displayed, making it very difficult for the operator to make a judgment.

(Purpose of the invention) In view of such conventional problems, the present invention aims to optically display the operating state so that the operator can easily judge the operating state.

(Structure of the invention) As a means to achieve the above object, the present invention provides a rotary table on which a coiled material is placed on a base, and a control head at the upper end of a column erected on the base. A swinging arm having a guide roller for guiding the material unwound from the rotary table and supplied to the press machine is provided swingably so as to swing according to changes in the speed of the material. In a material feeding device equipped with a detector for detecting the swinging of the moving arm and controlling the drive motor of the rotary table, a display section is provided on the front side of the control head section, and the operating status is displayed optically on this display section. It is equipped with a light emitting body that displays images.

(Embodiment) Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 denotes a base, and a rotary table 2, a control box 3, and a column 4 are provided on the base 1. The rotary table 2 is used to place a coiled material 5, is rotatably supported around a vertical axis, and is driven by an internal drive motor 6 via a drive roller 7.
A control head section 8 is provided at the upper end of the column 4, and a support 10 for a swinging arm 9 and a display section 11 are provided on the top and bottom of the front surface of the control head section 8. The swinging arm 9 is swingable around the axis of the support 10, and the lower end of the swinging arm 9 has a
A guide roller 12 is provided for guiding the material 5 that is unwound from the rotary table 2 and supplied to a press (not shown). 13 is a balance weight for the swing arm 9. A potentiometer 14 is an example of a detector, and is incorporated into the control head 8 so as to be linked to the swinging of the swinging arm 9. 15 is a stopper.

The display section 11 is formed at the lower front of the control head section 8 in a forward-inclined state, and this display section 11 includes a second
As shown in the figure, in addition to a push-button operation button 16, a display line 17 and light emitters 18 to 22 arranged along this line are provided. The display line 17 is a horizontal portion 23 at the lower left of the display section 11.
It consists of an inclined part 24 that slopes obliquely upward from the right end of this horizontal part 23, and a falling part 25 that falls downward from the upper end of the inclined part 24. The light-emitting bodies 18 to 22 are for optically displaying the operating state, and are each composed of light-emitting diodes. The light emitter 18 is used to indicate a reset, the light emitter 19 is used to indicate 0 rotation, the light emitter 20 is used to indicate operation, the light emitter 21 is used to indicate maximum rotation, and the light emitter 22 is used to indicate an emergency stop.

FIG. 3 shows an electric circuit, in which 26 is a power transformer, 27 is a voltage regulator, 28 is a power changeover switch, and 29 is an amplifier. 30 is a reset voltage comparator, 31 is a 0 rotation voltage comparator, 32 is a maximum rotation voltage comparator, 33 is an emergency stop voltage comparator,
These are configured to output their respective outputs when the voltage from the potentiometer 14 reaches each set voltage. 34 is an exclusive OR circuit, and when the outputs of the voltage comparators 31 and 32 are both at low potential, the light emitter 2
2 is now lit. 35 is motor 6
The control circuit controls the motor 6 in proportion to the output of the amplifier 29 within the range from 0 rotations to the maximum rotation, and is configured so that the motor 6 does not operate unless reset after an emergency stop. 36 is a press emergency stop circuit.

In the above configuration, the potentiometer 14 is
After pressing the operation button 16, a voltage signal corresponding to the position of the swing arm 9 is always generated, and the voltage signal is compared with the voltage set in each of the voltage comparators 30 to 33.

When the swing arm 9 is at the reset position A shown in FIG. 4, the signal from the potentiometer 14 is compared by the comparator 30, and the output is a low voltage, so the light emitter 18 lights up and resets. Show status.

Next, the material 5 on the rotary table 2 is passed through, and when the rotary table 2 is stopped or rotating at a very low speed, the swinging arm 9 is moved by the material 5 to the 0 rotation position B.
Swings in the direction of the arrow. At this time, voltage comparator 3
1 works and its output becomes a low voltage, so the light emitter 19 for 0 rotation emits light to indicate that the speed is stopped or extremely low. Of course, the light emitter 18 is off at this time.

When the press machine operates and the material 5 is pulled in the direction of arrow b, the swinging arm 9 is moved through the guide roller 12.
A force is applied to the swing arm 9, and the swing arm 9 swings in the direction indicated by the arrow a. Then, the signal of the potentiometer 14 changes, and the signal is sent to the control circuit 35 via the amplifier 29.
The drive motor 6 rotates in response to changes in the position of the swing arm 9, that is, the tension of the material 5 from the press machine side, and sequentially unwinds the material 5 on the rotary table 2 and supplies it to the press machine. do. At this time, the output of the voltage comparator 31 is at a high potential, and before the maximum rotation is reached, the output of the voltage comparator 32 is also at a high potential, so the exclusive OR circuit 34 operates.
Since the output is at a low potential, the light emitter 20 emits light to indicate that the motor is operating between 0 rotation and maximum rotation. The light emitter 19 disappears.

When the swing arm 9 swings to the maximum rotation position c, the output of the voltage comparator 32 becomes a low potential, the light emitter 21 emits light to indicate the maximum rotation, and the light emitter 20 goes out.

The press machine is operating at an abnormally high speed due to some reason, and the swing arm 9 moves to the emergency stop position D.
When the voltage comparator 33 swings to a low potential, the light emitter 22 emits light to indicate an emergency stop. Of course, at the same time, the output of the voltage comparator 33 is sent as an emergency stop signal to the control circuit 35 to stop the drive motor 6 and also to the emergency stop circuit 36 of the press to stop the press. After this emergency stop, unless the swing arm 9 is returned to the reset position A, restarting is not possible.

(Effects of the invention) According to the invention, since a light emitting body that optically displays the operating status is provided in the display section of the control head, the operator can visually determine the operating status at a glance, and the situation It is very effective in taking appropriate measures.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an overall perspective view, Fig. 2 is a front view of the display section, Fig. 3 is a block diagram of the electrical control system, and Fig. 4 is an explanatory diagram of the operation. . DESCRIPTION OF SYMBOLS 1... Base, 2... Rotating table, 4... Support column, 8... Control head section, 9... Swinging arm, 1
DESCRIPTION OF SYMBOLS 1... Display part, 12... Guide roller, 14... Potentiometer (detector), 18-22... Light emitter, 30-33... Voltage comparator, 34... Exclusive OR circuit.

Claims (1)

[Scope of utility model registration request] A rotary table on which a coiled material is placed is provided on the base, and the material that is unwound from the rotary table and supplied to the press is guided to a control head at the upper end of a column erected on the base. A swinging arm having a guide roller for the rotation table is swingably provided so as to swing according to changes in the speed of the material, and the swinging arm is detected to control the drive motor of the rotary table. Operation of a material supply device equipped with a detector, characterized in that the display section is provided on the front side of the control head section, and the display section is provided with a light emitting body that optically displays the operating status. Display device.