JPH061079U - Vehicle parking brake forgetting prevention device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A parking brake is provided to brake the vehicle during parking. However, if you forget to apply the parking brake during parking, the vehicle will start unmanned when parked on a slope, for example, which was dangerous. The present invention aims to solve this problem. According to the parking brake forgetting prevention device of the present invention, when the parking brake is applied and the key switch 3 is turned off, an alarm is not issued from the alarm device 6, and the key switch is operated without applying the parking brake. It is configured so that an alarm is issued from an alarm device when turned off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for preventing forgetting to apply a parking brake for traveling of a work vehicle such as a wheel loader.

[0002]

[Prior art]

 FIG. 2 is a side view of the wheel loader 1 which is an example of a vehicle. The wheel loader 1 is driven by an engine (not shown) and has a manually operated parking brake (not shown) for traveling.

[0003]

[Problems to be solved by the device]

 Conventionally, a working vehicle has been provided with a parking brake that brakes the vehicle during parking. This parking brake is a separate system from the brakes that are normally used, and is operated by the driver pulling the parking brake lever during parking. For this reason, if the driver forgets to apply the parking brake, the vehicle will be parked without being braked. As a result, if the vehicle is parked on a slope, the vehicle will start unmanned, which is dangerous.

[0004]

[Means for Solving the Problems]

 In the parking brake forgetting prevention device of the present invention, the parking brake switch is connected to the power source in parallel with the key switch, and the parking brake switch is turned on when the parking brake is not applied, and the parking brake is applied. It is set to turn off when activated, and an alarm is connected to the downstream side of the parking brake switch and key switch via a relay.When the parking brake is applied and the key switch is turned off, the alarm is turned on. When the power is turned off and the key switch is turned off without applying the parking brake, the circuit that connects the power supply, parking brake switch, relay contact, and alarm device remains energized, and the alarm device issues an alarm. Configured as follows.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an electric circuit diagram showing a parking brake forgetting prevention device of the present invention. In the figure, 2 is a power source equipped on the vehicle, 3 is a key switch for an engine (not shown), and 4 is a parking brake that performs on / off operation in conjunction with release / brake operation of a parking brake (not shown). Switches 5 are relays, 6 are alarm lamps and alarms such as buzzers, and 7 are fuses.

Next, the configuration of the parking brake forgetting prevention device of the present invention will be described with reference to FIG. In the present invention, the parking brake switch 4 is connected to the power source 2 in parallel with the key switch 3, and the parking brake switch 4 is turned on when the parking brake is not applied and turned off when the parking brake is applied. The alarm device 6 is set to operate, and the alarm device 6 is connected to the downstream side of the parking brake switch 4 and the key switch 3 via the relay 5, and when the parking brake is applied and the key switch 3 is turned off, the alarm device 6 is not activated. When the key switch 3 is turned on without applying the parking brake, the circuit connecting the power supply 2, the parking brake switch 4, the relay Elo of the relay 5, and the alarm 6 must be kept in the energized state. Therefore, the alarm device 6 is configured to issue an alarm.

Next, the operation of the parking brake forgetting prevention device of the present invention will be described. First, as the first case, a case where the vehicle is rotating the engine will be described. In the first case, since the key switch 3 is closed, the coil 8 of the relay 5 is energized regardless of whether the parking brake switch 4 is on or off (that is, regardless of whether the parking brake is released or operated). Therefore, the contact EHA is connected and the contact ERO is in the cutoff state. Although the engine continues to rotate, the alarm 6 does not generate an alarm because it is not energized.

Next, as a second case, description will be given of a case where the parking brake is applied and the key switch 3 is turned off when the vehicle whose engine is rotating is parked. Both the parking brake switch 4 and the key switch 3 are turned off. The relay 5 and the alarm device 6 are both de-energized, the alarm of the alarm device 6 is not generated, and the engine is stopped. In other words, it is possible to park safely with the parking brake applied.

Next, as a third case, a case where the key switch 3 is turned off without applying the parking brake when the vehicle whose engine is rotating is parked will be described. In this case, the parking brake switch 4 remains on and the key switch 3 is opened. Since the key switch 3 is opened, the coil 8 of the relay 5 is not energized, so that the contact point ERO is open. Therefore, the current from the power source 2 flows to the alarm device 6 through the electric lines 9 and 10, the parking brake switch 4, the electric line 11, the contact ero of the relay 5, and the electric line 12. Therefore, the engine stops, but the alarm device 6 continues to give an alarm. The driver can recognize the alarm and notice that he or she forgets to apply the parking brake.

Next, as a fourth case, a case where the driver notices that he / she forgets to apply the parking brake and applies the parking brake when the third case is performed will be described. In this case, the parking brake switch 4 is turned off after the key switch 3 is opened. That is, although the engine is stopped, the alarm of the alarm device 6 also stops and the parking brake is applied. Therefore, it is possible to prevent forgetting to apply the parking brake when the vehicle is parked.

[0011]

[Effect of device]

 Conventionally, a working vehicle has been provided with a parking brake that brakes the vehicle during parking. However, if you forget to apply the parking brake during parking, the vehicle will start unmanned when parked on a slope, for example, which was dangerous. However, in the parking brake forgetting prevention device of the present invention, when the parking brake is applied and the key switch is turned off, the alarm is not generated from the alarm device, and the key switch is turned off without the parking brake. Occasionally, an alarm was issued by an alarm device. As a result, when parking a vehicle whose engine is rotating, if the parking brake is forgotten even if the key switch is turned off, the engine will stop but the alarm will continue to give an alarm. The driver can recognize the warning and notice that the parking brake has not been applied. In this case, if the parking brake is applied, the alarm will stop and the operation of the parking brake can be confirmed, enabling safe parking.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a parking brake forgetting prevention device of the present invention.

FIG. 2 is a side view of a wheel loader that is an example of a vehicle.

[Explanation of symbols]

 1 Wheel loader 2 Power supply 3 Key switch 4 Parking brake switch 5 Relay 6 Alarm device 8 Coil

Claims (2)

[Scope of utility model registration request] 1. A parking brake forgetting application device for issuing an alarm when a parking brake is forgotten to be applied when a vehicle is parked. An alarm is provided when the parking brake is applied and a key switch is turned off. A device for preventing forgetting to apply a parking brake for a vehicle, wherein an alarm is not issued from the device, and when the key switch is turned off without applying the parking brake, an alarm is issued from the alarm device. 2. A parking brake forgetting prevention device for issuing an alarm when a parking brake is forgotten to be applied when a vehicle is parked, the parking brake switch being parallel to a key switch with respect to a power source. Connect it, and turn on the parking brake switch when the parking brake is not applied,
The parking brake is set to be turned off when the brake is applied, and an alarm device is connected to the downstream side of the parking brake switch and the key switch via a relay. When the parking brake is applied and the key switch is turned off, an alarm is issued. When the device is de-energized and the key switch is turned off without applying the parking brake, the power supply, the parking brake switch, the relay contact, and the circuit that connects the alarm device maintain the energized state. A device for preventing forgetting to apply the parking brake of a vehicle, which is characterized in that it is designed to emit