JPH0516483U - Checking device for parking brake operation of connected vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] The operation status of the parking brake on the trailer side as well as the tractor side can be checked from the driver's seat. [Structure] In the middle of an electric circuit 13 connecting a power source 10 and a parking brake indicator lamp 11, a key switch 14 that turns on and off in response to a key operation, and a tractor side parking switch 15 that turns on and off in conjunction with a tractor side parking brake 24. Are provided in series, and a trailer-side parking switch 16 that is turned on / off in conjunction with the trailer-side parking brake 25 is provided in parallel with the tractor-side parking switch 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a parking brake operating state confirmation device for a combined vehicle including a tractor and a trailer.

[0002]

[Prior Art]

 As shown in FIG. 3, an articulated vehicle generally includes a tractor 1 and a trailer 2 towed by the tractor 1, and the tractor 1 and the trailer 2 are individually equipped with parking brakes. There is.

For example, as shown in FIG. 2, a trailer-side parking brake 25 mounted on the trailer 2 locks a parking handle 4 mounted on a frame 3 of the trailer 2 and having a ratchet mechanism (not shown). With the chain 5 removed, the chain 5 is rotated in a predetermined direction (clockwise in the example in the figure) to wind up the parking wire 6 and pull the parking lever 7, and is connected to the parking lever 7 via the wire 8 and The brake is applied by pulling the slack adjuster 9 fitted to the camshaft of the wheel brake (not shown).

When the trailer 2 connected to the tractor 1 is towed from the parked state, the trailer-side parking brake 25 is released by an operation reverse to the above, and after the parking brake on the tractor 1 side is released. , I am trying to start running.

[0005]

[Problems to be solved by the device]

 However, in the conventional combined vehicle as described above, the operating state of the parking brake on the tractor 1 side can be confirmed from the driver's seat, but the operating state of the trailer side parking brake 25 cannot be confirmed from the driver's seat, so the trailer side Sometimes, the tractor 1 was accidentally run while the parking brake 25 was operating.

In view of the above situation, the present invention intends to provide a parking brake operation state confirmation device for a combined vehicle capable of confirming the operation state of the parking brakes not only on the tractor side but also on the trailer side from the driver's seat. ..

[0007]

[Means for Solving the Problems]

 The present invention, in the middle of the electric circuit connecting the power supply and the parking brake indicator lamp, has a key switch that turns on and off in conjunction with key operation and a tractor side parking switch that turns on and off in conjunction with the tractor side parking brake. And a trailer-side parking switch that is turned on / off in conjunction with the trailer-side parking brake is provided in parallel with the tractor-side parking switch.

[0008]

[Action]

 Therefore, when trying to drive out of the parked state, the key switch is on, and even if the tractor side parking switch is turned off by releasing the tractor side parking brake, the trailer side parking brake is still active. In this case, the trailer-side parking switch provided in parallel with the tractor-side parking switch is kept on, so that a current flows from the power supply to the parking brake indicator lamp, and the parking brake indicator lamp lights up. The driver can confirm from the driver's seat that the trailer parking brake has not been released.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, the parts denoted by the same reference numerals as those in FIG. 2 represent the same thing. As shown in FIG. 1, the power source 10 and the parking brake indicator are shown. In the middle of the electric circuit 13 connecting the data lamp 11, a key switch 14 that is turned on / off in response to a key operation (not shown) and a tractor side parking switch 15 that is turned on / off in conjunction with the tractor side parking brake 24 are connected in series. Along with the provision, a trailer side parking switch 16 that turns on and off in association with the trailer side parking brake 25 is provided in parallel with the tractor side parking switch 15.

The tractor-side parking switch 15 is turned on only when the tractor-side parking brake 24 is activated by a detection signal 27 from a sensor 26 that detects the operating state of the tractor-side parking brake 24.

The trailer side parking switch 16 is a cable branched from the electric circuit 13 between the key switch 14 and the tractor side parking switch 15 and the electric circuit 13 between the tractor side parking switch 15 and the parking brake indicator lamp 11. 17 and 18, a trailer 2 side electric circuit 21 which is detachably connected to the tractor 1 side via jumper cables 19 and 20 is provided in the middle of the trailer 2 side electric circuit 21. The detection signal 23 from the sensor 22 for detecting the turning position is adapted to be turned on only when the trailer side parking brake 25 is operated.

With the configuration described above, when the driver tries to start from the parked state, the key switch 14 is turned on, and the tractor side parking switch 15 is turned off by releasing the tractor side parking brake 24. Also, when the trailer side parking brake 25 is in the operating state, that is, when the rotating position of the parking lever 7 is in the brake operating position and the sensor 22 outputs the detection signal 23 to the trailer side parking switch 16. Since the trailer parking switch 16 provided in parallel with the tractor parking switch 15 is kept on, current flows from the power supply 10 to the parking brake indicator lamp 11, and the parking brake indicator lamp 11 remains lit. It does not disappear, the driver You can check in the driver's seat that the rerail parking brake 25 has not been released.

In this way, it is possible to prevent the tractor 1 from being accidentally run while the trailer side parking brake 25 is being operated.

It should be noted that the parking brake operation state confirmation device for a combined vehicle according to the present invention is not limited to the above-described embodiment, but instead of interlocking the trailer side parking switch with the rotating position of the parking lever, The side parking brake may be configured to be interlocked with the position of the parking handle, the tension of the parking wire, the state of the lock chain, etc., and other various changes are made without departing from the scope of the present invention. Of course, can be added.

[0016]

[Effect of the device]

 As described above, according to the parking brake operation state confirmation device for a combined vehicle of the present invention, the operation state of the parking brakes not only on the tractor side but also on the trailer side can be confirmed from the driver's seat, and the trailer side parking brake is activated. It is possible to achieve an excellent effect that the tractor is not accidentally run while being left.

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a trailer side parking brake.

FIG. 3 is an overall side view of a combined vehicle.

[Explanation of symbols]

 1 tractor 2 trailer 10 power supply 11 parking brake indicator lamp 13 electric circuit 14 key switch 15 tractor side parking switch 16 trailer side parking switch 24 tractor side parking brake 25 trailer side parking brake

Claims (1)

[Scope of utility model registration request] 1. A key switch that is turned on / off in conjunction with a key operation and a tractor-side parking switch that is turned on / off in conjunction with a tractor-side parking brake are connected in series in the middle of an electric circuit that connects a power source and a parking brake indicator lamp. A parking brake operating state confirmation device for a combined vehicle, wherein a trailer parking switch that is provided and is turned on / off in conjunction with the trailer parking brake is provided in parallel with the tractor parking switch.