JPS62134350A - Antistatic device for conveying vehicle - Google Patents

Abstract

PURPOSE:To prevent the wear of a discharging lever and the stir-up of dust by making an electromagnet a non-exciting condition and lifting up said discharging lever with a support spring when a conveying vehicle is traveling in a factory, while on the other hand, exciting said electromagnet and bringing said discharging lever into contact with a traveling surface when said conveying vehicle is stopping. CONSTITUTION:When a travel command is issued by a control unit 12 and an electromagnetic switch is excited, its always opening contact 13a is turned on, a travel driving circuit 14 is energized, and a conveying vehicle 1 starts traveling. At the same time, an always closing contact 13b is turned off, making an electromagnetic control circuit 15 deenergized, separating a discharging lever 8 from a traveling surface 4 by the action of a support spring 10 and a permanent magnet 9. On the other hand, when a travel stop command is issued, the contact 13a is turned off stopping the travel of the conveying vehicle 1. At the same time, the contact 13b is turned on, the electromagnetic control circuit 15 is energized, and an electromagnet 11 is excited. Thereupon, the discharging lever 8 is depressed, its end part 8b is brought into contact with the traveling surface 4, and a static electricity which has been charged in the conveying vehicle 1 is discharged to the traveling surface.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an antistatic device for a conveyance vehicle, which discharges static electricity charged on a conveyance vehicle in a factory or the like onto a running surface.

(Prior Art) Fig. 4 is a cross-sectional view showing the configuration of a conventional transport vehicle. Wheels 3 are attached.

A plurality of these running wheels 3 are provided and roll on a running surface 4 inside a factory or the like.

In addition, a control device 5 is mounted inside the main body frame 2, and when the guided vehicle 1 runs, static electricity is generated due to friction between the running surface 4 and the running wheels 3, and the main body frame of the guided vehicle 1 is 2 is charged.

In order to prevent this charging, one end of the discharge chain 6 is attached to the bottom of the main body frame 2, and the other end of the discharge chain 6 is brought into contact with the running surface so that the static electricity charged on the transport vehicle is transferred to the running surface 4. It is designed to discharge electricity. .

[Problem that the invention seeks to solve]

However, when the transport vehicle 1 runs, the other end of the discharge chain 6 rubs against the running surface 4, and not only is it easy to get lumps, but also the discharge chain 6 may be worn out and cut.

When the discharge link 6 is cut, the transport vehicle 1 is charged with static electricity, causing a problem that the control device 5 mounted on the transport vehicle may be damaged or malfunction.

This invention was made in order to solve these problems, and aims to provide an antistatic device for a transport vehicle that does not generate wear or dust, consumes less power, and can prevent damage and malfunction of control equipment. shall be.

[Means for solving problems]

The antistatic device for a transport vehicle according to the present invention is provided with a discharging lever on the main body frame of the transport vehicle, which enables discharging only when the transport vehicle is stopped.

[Effect]

In this invention, when the transport vehicle is running, the discharging lever is lifted from the running surface by a permanent magnet and a spring, and when the vehicle is stopped, the electromagnet and permanent magnet repel, and the discharging lever comes into contact with the running surface to discharge static electricity.

〔Example〕

Embodiments of the antistatic device for a transport vehicle according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the configuration of one embodiment. In FIG. 1, in order to avoid duplication, the same parts as in FIG. 4 are given the same reference numerals, and their explanations are omitted, and only the parts that are different from FIG. 4 will be explained.

As is clear from comparing Figure 1 with Figure 4,
In the figure, the following parts are newly added to the configuration in which the discharge link 6 in FIG. 4 is omitted.

That is, the discharging lever support frame 7 is attached to a predetermined location on the bottom of the main body frame 2. One end portion 8a of the discharge lever 8 is rotatably attached to the tip of the discharge lever support frame 7.

A permanent magnet 9 is attached to the upper surface of the other end 8b of the discharge lever 8. A support spring 10 is attached between the discharge lever 8 and the bottom of the main body frame 2 at a position between the permanent magnet 9 and the discharge lever support frame 7 . This support spring 10 is always biased so as to attract the other end 8b of the discharge lever 8 toward the bottom side of the main body frame 2.

An electromagnet 11 is attached to the main body frame 2 in correspondence with the permanent magnet 9. Excitation of this electromagnet 11.

De-energization is controlled by a control device provided within the control device 5.

The configuration of this control device is as shown in FIG. In this FIG. 2, line LL.

(+) and (-) voltages are applied to L2, respectively. A series circuit including a control circuit 12 and an electromagnetic switch 13 for driving signals is connected between the lines L1 and L2.

Moreover, a series circuit of the normally open contact 13a of the electromagnetic switch 13 and the traveling drive circuit 14 is connected between the lines Ll and L2.

Furthermore, a series circuit of the normally closed contact 13b of the electromagnetic switch 13 and the electromagnet control circuit 15 is connected between the lines L1 and L2.

Next, the operation of the antistatic device for a transport vehicle of the present invention configured as described above will be explained. When the control circuit 12 operates and a running Iw command is issued, the electromagnetic switch 13 for running signals is activated.
is excited.

As a result, the normally open contact 13a is closed and the traveling drive circuit 14 is energized. As a result, the transport vehicle 1 starts traveling. FIG. 1 shows the traveling state of this transport vehicle 1.

At the same time, the normally closed contact 13b of the electromagnetic switch 13
is opened, so the electromagnet control circuit 15 is deenergized.

Therefore, the electromagnet 11 is demagnetized, and the other end 8b of the discharging lever 8 is lifted off the running surface 4 by the force of the support spring 1° and the attractive force of the permanent magnet 9, and as shown in FIG. state.

Next, when the control circuit 12 operates and a travel stop command is issued, the electromagnetic switch 13 for the travel signal is demagnetized. As a result, the normally open contact 13a is opened, and the traveling drive circuit 14
is deenergized, and the traveling of the transport vehicle 1 is stopped.

At the same time, the normally closed contact 13b of the electromagnetic switch 13 is closed, so the electromagnet control circuit 15 is energized and the electromagnet 1
1 is excited.

FIG. 3 shows the stopped state of the transport vehicle 1. As is clear from FIG. 3, when the electromagnet 11 is excited, the electromagnet 11 and the permanent magnet 9 exert a repulsive action, and the elasticity of the support spring 10 is Against this, the other end 8b of the discharge lever 8 hangs down and comes into contact with the running surface 4. As a result, the static electricity charged on the transport vehicle 1 is discharged onto the running surface 4 through the main body frame 2 and the discharge lever 8.

〔Effect of the invention〕

As explained above, in this invention, when the transport vehicle is running, the electromagnet is de-energized and the discharging lever is lifted by a permanent magnet and a support spring, and when the transport vehicle is stopped, the electromagnet is energized and the discharging lever is placed on the running surface. I made it contact, so
The discharging lever does not come into contact with the running surface while the transport vehicle is running, which prevents the discharging lever from being worn out and generating dust.

In addition, since the electromagnet is energized only when the conveyance vehicle is stopped, power consumption is low.Furthermore, since the electromagnet is discharged when the vehicle is stopped, the frame body is not charged with static electricity, which prevents control equipment failures and malfunctions. It can definitely be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of an embodiment of the antistatic device for a guided vehicle according to the present invention during running, FIG. 2 is a circuit diagram of an electromagnet control device in the antistatic device for the guided vehicle, and FIG. 3 FIG. 4 is a cross-sectional view of the antistatic device for the transport vehicle when it is stopped, and FIG. 4 is a cross-sectional view showing the structure of the conventional antistatic device for the transport vehicle. DESCRIPTION OF SYMBOLS 1... Transport vehicle, 2... Main body frame, 3... Running wheels, 4... Running surface, 5... Control equipment, 7... Lever support frame for discharge, 8... Discharge lever, 9.
...Permanent magnet, 10... Support spring, 11... Electromagnet, 12... Control circuit, 13... Electromagnetic switch, 14...
... Travel drive circuit, 15... Electromagnetic control circuit. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A discharging lever whose one end is rotatably attached to the main body frame of the transport vehicle, a support spring that constantly lifts the discharging lever toward the main body frame, and a discharging lever at the other end of the discharging lever. an attached permanent magnet, an electromagnet attached to the main body frame facing the permanent magnet, and a discharging lever that demagnetizes the electromagnet when the conveyance vehicle is traveling and contacts the traveling surface when the conveyance vehicle is stopped. An antistatic device for a transport vehicle, comprising a control means for exciting an electromagnet so that the permanent magnet and the electromagnet repel each other.