JPS63225001A - Controller for garbage wagon - 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 [Field of Industrial Application] The present invention relates to a control device for a garbage collection vehicle that can protect electrical components of a control circuit from high-voltage current that flows instantaneously during welding of a vehicle body.

[Conventional technology]

Generally, as shown in Fig. 1, a tailgate T having a built-in garbage loading device (not shown) is connected to the rear of the garbage storage box B, and the garbage thrown into the tailgate T is transferred to the garbage loading device. There is a known garbage collection vehicle that collects garbage in a garbage storage box B, transports the collected garbage to a garbage treatment plant, and then dumps the garbage storage box B and tailgate T backward to discharge the garbage. .

This type of conventional garbage collection vehicle has a control circuit that includes an implanted circuit that operates the garbage loading device (not shown) and a discharge circuit that dumps the garbage storage box B and tailgate T rearward. This control circuit includes various switches 1, 2.7 to 13, 17, 18 and solenoid valves 4 to 6.
14 to 16 and relays on the printed circuit board 3. These electrical components 1 to 18 are attached to various parts of the vehicle body as shown.

By the way, the wiring of these eight types of conventional control circuits was
As disclosed in Japanese Patent Application No. 0-30601, the power line from the battery etc. is branched to electrical components 1 to 18 from the middle, and the power line is directly connected to the location near where these electrical components 1 to 18 are installed. I am trying to connect the ground wire.

[Problem that the invention seeks to solve]

However, with wiring that connects the ground wire directly to the car body, during welding for car body repair, high voltage current that flows instantaneously enters the electrical parts 1 to 18 from all the ground wires and is induced through poor insulation. There was a problem in that it generated electric current, which could damage electrical components such as relays. The above-mentioned disadvantages are particularly problematic for garbage collection vehicles because their bodies are often severely damaged and need to be repaired by welding.

In addition, recently, electrical parts with built-in semiconductors such as transistors, or Japanese Patent Laid-Open Publication No. 1983-1999. As disclosed in Japanese Patent No. 143802, a system using a microcomputer has been proposed. In such a case, a problem arises in that the electrical components are easily damaged by the instantaneously flowing high-voltage current.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve the problems of the conventional technology described above, and to provide a garbage collection vehicle that can prevent damage to electrical parts even if high voltage current flows through the vehicle body due to welding or the like. The purpose of this invention is to provide a control device.

[Means for solving problems]

In order to achieve the above object, the present invention provides a control device for a garbage collection vehicle in which the body of the garbage collection vehicle constitutes a ground for a control circuit consisting of an implanted circuit and a discharge circuit. The invention is characterized in that it is provided with an opening/closing means that can electrically switch between the two.

[For production]

According to the present invention, when performing welding or the like, the vehicle body and the control circuit are electrically disconnected by the opening/closing means.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a control device for a garbage collection vehicle according to the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a perspective view of a garbage collection vehicle. Its structure is the same as the conventional one, and the switches, solenoid valves, printed circuit boards, etc. that make up the control circuit are the same as the conventional ones. mounted on top.

FIG. 2 is a control circuit diagram of the control device according to the present invention. In the figure, Sws is a selection switch connected to the power source E and capable of instructing either the loading circuit A or the discharging circuit B. Since the configurations of the loading circuit A and the discharging circuit B are similar to those of the conventional circuit, only an outline thereof will be described below.

When loading is instructed with the selection switch Sws, the implanted circuit A
Current flows through the inner bus bar a to the switches 7.8.10 to 13, and then when the automatic loading switch PB is turned on, the solenoid valves 4.15.16 are energized depending on the open/closed state of the switches. Then, a series of loading operations of the garbage loading device (not shown) are started, and garbage is loaded into the garbage storage box B.

On the other hand, when the selection switch Swt is used to instruct discharge, the tailgate switch Swt passes through the bus in the discharge circuit B.
Current flows through the body switch Swb, and then when the tailgate switch Swt instructs to raise or lower, the solenoid valve 6.14 is energized and the tailgate T moves up and down, and the body switch Swb raises or lowers. When instructed, the solenoid valve 5 is energized and the garbage storage box B is moved up and down.

In the control circuit configured in this way, in the conventional one, a ground wire was connected to each electrical component, but according to the present invention, a single ground wire C is connected to the vehicle body. Each of the electrical components is connected to the ground line C via a changeover switch 20 that operates in conjunction with the selection switch Sws.

This changeover switch 20 constitutes an opening/closing means.

According to the present invention, even when the ground wire 22 of the welding machine 21 is connected to the rear part of the tailgate T as shown in FIG. 1, and the defective part 23 is welded, the If the selector switch 20 is placed in the neutral position, the vehicle body and the main control circuit are electrically disconnected, thereby reliably eliminating the inconvenience of high-voltage current flowing to the electrical components constituting the control circuit and damaging them. Can be done. Moreover, if the changeover switch 20 and the selection switch S w s are configured to work together, the number of parts can be reduced and the operation thereof becomes extremely easy.

FIG. 3 shows another embodiment of the control device according to the invention.

According to this embodiment, when a current exceeding the - window flows between the selection switch Sws and the power source E, that is, when a high voltage current generated during welding flows, the contact opens instantly and the current flows to the control circuit. A circuit breaker 25 is connected to the circuit breaker 25. A single ground wire C to the vehicle body and each of the electrical components are connected to this circuit breaker 25. The circuit breaker 25 constitutes a switching means. Note that the control circuit itself is the same as that shown in FIG. 2, so a description thereof will be omitted.

With this configuration, normally the selection switch Sws
The control circuit is controlled by switching the control circuit, and when an abnormal current flows, the vehicle body and the control circuit are disconnected, and the electrical components in the control circuit are protected. Since the circuit breaker 25 is automatically opened when high-voltage current flows, there is no need to worry about forgetting to turn on the changeover switch, and the circuit breaker 25 will respond reliably even if some abnormal current flows while the control circuit is operating. So,
Electrical components can be reliably protected.

〔Effect of the invention〕

With the above configuration, according to the present invention, even if a high voltage current flows through the vehicle body during welding, etc., by opening the opening/closing means, it is possible to reliably prevent the current from flowing into the control circuit. can. Furthermore, since the electrical parts can be grounded in one place, the grounding wiring can be simplified and maintenance efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a garbage collection vehicle, FIG. 2 is a control circuit diagram showing one embodiment of a control device according to the present invention, and FIG. 3 is a control circuit diagram showing an embodiment of the same. 1.2.7~13,17.18...Switches, 4~
6.14-16... Solenoid valves, 20... Changeover switch (opening/closing means), 25... Circuit breaker (opening/closing means), B.
...Garbage storage box, T...Tailgate, Sws...
Selection switch, Swt...Tailgate switch, S
w b...Body switch, A...Loading circuit, B
...Exhaust circuit.

Claims (1)

[Scope of Claims] 1. In a control device for a garbage collection vehicle in which the body of the garbage collection vehicle constitutes a ground for a control circuit consisting of a loading circuit and a discharge circuit, the vehicle body and the control circuit are electrically connected to each other. A control device for a garbage collection vehicle, characterized in that it is provided with an opening/closing means that can be switched between. 2. The control device according to claim 1, wherein the opening/closing means is a changeover switch that operates in conjunction with a selection switch for the loading circuit or the discharge circuit. 3. The control device according to claim 1, wherein the switching means is a circuit breaker that automatically opens when a certain amount of current flows.