JP2500536B2 - Emergency stop device for track vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency stop device for a track vehicle having two brake systems that can be operated from a workbench.

[0002]

2. Description of the Related Art There are track running vehicles that run on rails of railways and repair and inspect various workpieces (for example, overhead lines) installed above. For track vehicles,
It is equipped with a workbench that moves up and down, on which a worker rides to work on a work piece in a high place.

As such an orbital vehicle, a vehicle which can be driven not only on a normal road but also on a rail has already been proposed (for example, Japanese Utility Model Laid-Open No. 54-143508).
Issue).

FIG. 2 is a schematic view of the appearance of such a track vehicle. In FIG. 2, 1 is a vehicle, 1-1 is a front wheel (tire), 1-2 is a rear wheel (tire), 2 is a workbench, 3 is an operation panel, 6 is an iron wheel brake pedal, and 12 is a lifting hydraulic cylinder. , 13 is an engine, 14 is a clutch, 15 is a support member, 16 is an iron wheel, 17 is an iron wheel brake, 18
Is a rail.

[0005] A railroad vehicle rides on a rail at a railroad crossing or the like, and at that time, the iron wheels 16 are stored while traveling on the road.
Down so that it fits into the rails on the front and rear of the vehicle. And
The rear wheel 1-2 of the tire, which is the driving wheel, is kept in contact with the rail, and the front wheel 1-1 of the tire is lifted from the rail by hydraulically pushing up the front part of the vehicle body. The iron wheel 16 only travels along the rail 18 as a guide, and the driving force for forward and backward movement is supplied from the rear wheel 1-2.

The workbench 2 is moved up and down by a lifting hydraulic cylinder 12 that pushes up a workbench support frame 11. The operation of raising and lowering is performed by a worker who has entered the workbench 2 by operating a switch of an operation panel 3 provided therein.

The workbench 2 is provided with iron wheel brake pedals 6 for operating the iron wheel brakes 17. This is because when the vehicle 1 starts to move undesirably,
This is a device for allowing a worker on the workbench 2 to stop the vehicle 1 in an emergency.

[0008]

However, in the above-described conventional tracked vehicle, the brake system operated from the workbench 2 is the iron wheel brake 1 that acts on the iron wheel 16.
There is a problem that there is concern about the reliability of the emergency stop because there is only one system of 7. If the brake breaks down and the orbital vehicle runs out of control, there is a great possibility of causing a major accident only on the mass-transportation railway, and the reliability of the emergency stop is required even more strongly on the road.

It is conceivable that the brake mechanism applied to the tire wheels can be operated from the workbench 2 as well as from the driver's seat of the vehicle 1 so as to have two systems, but it is too costly. There is a drawback.

An object of the present invention is to solve the above problems.

[0011]

In order to solve the above-mentioned problems, in the emergency stop device for a track vehicle according to the present invention, as a brake system that can be operated from an ascending / descending workbench, it is fitted on a rail and travels as a guide. The system that brakes the iron wheels with the iron wheel brake pedal and the signal from the emergency stop switch provided on the operation panel stop the engine and control the electronically controlled transmission and clutch in the vehicle to drive the running gear. And a system for connecting the clutch and braking the tire driving wheels mounted on the rail surface.

[0012]

[Operation] There are two braking systems that can be operated from the workbench of a track vehicle: one that brakes iron wheels and one that brakes tire drive wheels. Braking of tire driving wheels is realized by remotely controlling an electronically controlled transmission and a clutch from a work table, using a gear as a running gear to connect the clutch, and stopping the engine.

Then, even if one of the brake systems fails, the other system can be braked, and the emergency stop of the track vehicle can be performed more reliably from the workbench, and safety for accident prevention can be achieved. The property is also improved.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. In recent years, the number of automobiles in which the transmission operation and the clutch operation are electronically controlled is rapidly increasing. However, in the present invention, automobiles used as track vehicles are vehicles with such an electronically controlled automatic transmission. It is assumed that.

FIG. 1 is a block diagram of an emergency stop device for a track vehicle according to the present invention. In FIG. 1, 1 is a vehicle,
2 is a workbench, 3 is an operation panel, 4 is an emergency stop switch,
5 is a workbench side control unit, 6 is an iron wheel brake pedal, 7 is an auxiliary control unit, 8 is a main control unit, 9 is an engine stop relay, 1
Reference numeral 0 is a clutch actuator.

In the present invention, the iron wheel brake pedal 6 is used as a brake system that can be operated from the workbench 2.
The main purpose is to provide a second brake system for braking the rear wheels 1-2, which are tire driving wheels, in addition to the conventional system for operating the iron wheel brakes 17 by pressing.

The operation panel 3 of the workbench 2 is provided with an emergency stop switch 4 which issues an emergency stop signal when pressed. An engine stop relay 9 whose operation is controlled by a signal from the main control unit 8 is provided on the vehicle 1 side. The engine stop relay 9 is for shutting off the fuel supply to the engine. The vehicle 1 side has a clutch
An auxiliary control unit 7 is provided which issues a control signal to the actuator 10.

When the iron wheel brake 17 is not applied even when the iron wheel brake pedal 6 is depressed, the emergency stop switch 4 is pressed. Then, the engine stop relay 9 is activated by the emergency stop signal, and the engine as the drive source is stopped. At the same time, the clutch actuator 10 is activated and the clutch is engaged.

If the gear at that time is a running gear (other than neutral), the rear wheels 1-2 are braked and stopped (rear wheels 1-2) by the same principle as engine braking.
Cannot rotate unless the piston of the stopped engine is moved, so the vehicle 1 stops). The engine stop relay 9 automatically returns to the original supply state after a few seconds have passed since the engine stop relay 9 was activated, and prepares for the next engine start.

However, when the gear is neutral (N), the rear wheel 1-2 easily rotates even if the clutch is engaged, and therefore the brake is not applied. Therefore,
When operating the clutch / actuator 10, it is determined whether or not the gear is in neutral, and if it is in neutral, the clutch is engaged after shifting to the running gear.

The emergency stop signal to the engine stop relay 9 and the clutch actuator 10 is sent from the workbench side control unit 5 to the main control unit 8 instead of being divided from the main control unit 8 into two hands. At the stage, it is better to send a signal dedicated to the engine stop relay 9 and a signal dedicated to the clutch actuator 10 separately. This is because, even if some failure occurs in one signal path, if the other signal path is alive, either the engagement of the clutch or the engine stop can be realized.
This will contribute to the suspension of

FIG. 3 shows a flow chart for explaining the emergency stop operation as described above. Item numbers ~ in the following description correspond to steps ~ in the flowchart. The emergency stop switch 4 on the operation panel 3 is pressed,
Determine if an emergency stop signal has arrived. If it has not come, the signal emitted by the running condition of the vehicle 1
Normal clutch automatic control is performed. If the emergency stop signal is received, it is determined whether the gear is in neutral. The determination is made based on which of the gear position switches (not shown) attached to the gear is on. When the vehicle is not in neutral, that is, when the vehicle is in the running gear such as the first speed, the clutch / actuator 10 is operated to bring the clutch into engagement. If it is neutral, a command is sent to a shifter (not shown) to shift to a traveling gear (for example, first speed).
It is determined whether the vehicle has entered the running gear. It will take some time to enter, so check that. If not already engaged, the clutch is automatically controlled normally as in step.

In the example described above, the rear wheels of the vehicle 1 are the drive wheels, but when the front wheels are the drive wheels, the front wheels are naturally braked.

The workbench side control unit 5
Since it is preferable that the communication between the vehicle and the main control unit 8 on the vehicle side be performed in an electrically insulated state, it is better to connect the both by an optical fiber cable instead of an electric wire. In that case, both control units are provided with a configuration for converting between electrical and optical signals.

[0025]

As described above, according to the present invention, the brake system that can be operated from the workbench of the track vehicle brakes the iron wheels and the tire that is in contact with the rail to generate the driving force. Since there are two, one that brakes the drive wheels,
Even if one brake system fails, the other system can brake. Therefore, the emergency stop of the track vehicle can be performed more reliably from the workbench, and the safety of accident prevention is improved.

[Brief description of drawings]

FIG. 1 is a block diagram of an emergency stop device for a track vehicle according to the present invention.

[Fig.2] Outline view of track car

FIG. 3 is a flowchart illustrating an emergency stop operation.

[Explanation of symbols]

 1 vehicle 1-1 front wheel 1-2 rear wheel 2 workbench 3 operation panel 4 emergency stop switch 5 workbench side control unit 8 main control unit 9 engine stop relay 10 clutch actuator 11 workbench support frame 12 lifting hydraulic pressure Cylinder 13 Engine 14 Clutch 15 Supporting member 16 Iron wheel 17 Iron wheel brake 18 Rail

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenya Misawa Kenya Misawa 8 Soil Shelf, Fujisawa City Isuzu Motors Co., Ltd. Fujisawa Plant (72) Inventor Kenichi Igashi 8th Shelf, Fujisawa Isuzu Motors Co., Ltd. Fujisawa Plant (72) Inventor Daiji Okubo 8 Soil Shelf, Fujisawa City Isuzu Motors Ltd., Fujisawa Plant (56) References: Showa 54-143508 (JP, U) Showahei 1-139047 (JP, U) Actual development Sho 60-180300 (JP, U)

Claims (1)

(57) [Claims] 1. As a brake system that can be operated from a work table that moves up and down, a system that brakes an iron wheel fitted on a rail and traveling as a guide by an iron wheel brake pedal and an emergency stop switch provided on an operation panel are used. The signal is used to stop the engine, control the electronically controlled transmission and clutch in the vehicle, connect the clutch with the running gear, and brake the tire driving wheels mounted on the rail surface. An emergency stop device for a track vehicle, characterized by being equipped with.