JPH0565701U - Safety device for inspection door - Google Patents

Abstract

(57) [Summary] [Purpose] When inspecting high-voltage power supplies and high-voltage electrical equipment,
To provide a safety device for inspection doors that improves safety by eliminating electric shock. [Structure] An inspection window 7 for inspecting the high-voltage power supply and the electric equipment is formed in an inspection door 9 in an exterior 3 of a vehicle 1 equipped with the high-voltage power supply 5 and the electric equipment. A small window 13 for operation is formed on the inspection door 9, and the breaker 2 is located at a position where the small window 13 can be operated.
1 is provided. The breaker 21 disconnects the high voltage power supply 5 from the load power supply circuit 23. Close the inspection door 9 and breaker 2
The inspection door 9 is locked by the lock mechanism 17 when 1 is turned on, and is locked only when the breaker 21 shuts it off.
Is unlocked, and the inspection door 9 is unlocked.
As a result, the application of voltage to the load power supply circuit is stopped, so that electric shock can be prevented and safety can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety device for an inspection door in a vehicle equipped with a high-voltage power supply, which prevents electric shock when the inspection door is opened to inspect the high-voltage power supply or the like.

[0002]

[Prior Art]

 Vehicles equipped with a high-voltage power supply include an internal combustion engine / electric auxiliary drive system. In this internal combustion engine / electric auxiliary drive system, a thin AC rotary machine is built in the flywheel housing of a large diesel engine, and the operation of the AC rotary machine is controlled by an inverter device to regenerate braking energy as electricity. For example, a device that charges a 300V high-voltage power supply (battery) and assists the diesel engine with torque by rotating the AC rotating machine with electric energy from the battery when the vehicle starts and accelerates. Is proposed as.

In such a vehicle, an inspection door is provided to inspect the battery and the inverter device. When the battery or inverter device needs to be inspected or repaired, after opening the inspection door, the breaker provided inside the inspection door and near the battery terminals is shut off to disconnect the load power circuit. The connection was cut off, and then it was inspected or repaired.

[0004]

[Problems to be solved by the device]

 In the above-mentioned vehicle, voltage is applied to the auxiliary machinery and other loads unless the breaker is cut off, and there is a risk of electric shock if carelessly touched the auxiliary machinery.

In view of the above-mentioned problems, it is an object of the present invention to provide an inspection door safety device that eliminates electric shock and improves safety.

[0006]

Means for Solving the Problems In order to achieve the above object, a safety device for an inspection door according to a first aspect of the present invention is a vehicle equipped with a high-voltage power supply and electric equipment, inspecting the high-voltage power supply and the electric equipment. The inspection door that is openably and closably attached to the inspection port and the operation port for operation, and the position where it can be operated from the operation port, and that shuts off the high-voltage power supply from the load power supply circuit. It consists of a circuit breaker and a lock mechanism that locks the inspection door when the circuit breaker is closed when the inspection door is closed, and unlocks the inspection door only when the circuit breaker is used. It is a feature.

In order to achieve the above object, a safety device for an inspection door according to a second aspect of the present invention is a vehicle equipped with a high-voltage power supply and electric equipment, which opens and closes an inspection port for inspecting the high-voltage power supply and electric equipment. It consists of an inspection door that is installed as possible, door opening detection means that detects the opening of the inspection door, and an electromagnetic switch that shuts off the high voltage power supply from the load power supply circuit by the detection of the door opening detection means. It is characterized by.

[0008]

[Action]

 In the safety device for an inspection door according to claim 1, the inspection door cannot be opened unless the circuit breaker is shut off from the operation port and the voltage application to the load power supply circuit is stopped, and conversely when the inspection door is opened. Since no voltage is applied to the load power supply circuit, electric shock due to carelessness can be prevented and safety can be improved.

In addition, in the inspection door safety device according to the second aspect, when the inspection door is opened, this is detected and the voltage application to the load power supply circuit is stopped. Therefore, electric shock can be prevented and safety can be improved. You can

[0010]

【Example】

 Hereinafter, the present invention will be described with reference to the illustrated embodiments.

FIG. 1 is a perspective view showing a mechanical structure of a safety device for an inspection door of the present invention. FIG. 2 is an explanatory diagram of the lock mechanism of the embodiment.

In the figure, a vehicle 1 such as a bus is covered with an exterior 3, and a high-voltage power source 5 of 300 [V], an inverter device, and other auxiliary equipment are provided inside the exterior 3 at a predetermined place. The kind is installed. In order to inspect the high-voltage power supply 5 and the auxiliary equipment, for example, an inspection port 7 is formed in a part of the external equipment 3, and an inspection door 9 covering the inspection port 7 can be opened and closed by a hinge 11 on the exterior. It is attached. An operation port 13 is formed in the upper left portion of the inspection door 9. An operation lid 15 that covers the operation port 13 is attached to the inspection door 9 so as to be openable and closable. An engagement piece 170, which is a part of the lock mechanism 17, is fixed at a predetermined position on the back side of the inspection door 9. The lock mechanism 17 includes the engaging piece 170 and an electromagnetic mechanism 171. The electromagnetic mechanism 171 is fixed to the base 19 or the like of the vehicle 1, and the L-shaped side surface of the plunger 172 engages with the engagement piece 170 at the time of energization to lock the inspection door 9 and de-energize. Occasionally, the plunger 172 is disengaged from the engagement piece 170 (dotted line in the figure) to release the lock. Therefore, the electromagnetic mechanism 171 is composed of a plunger 172, an electromagnetic coil (not shown), a spring, etc., and the plunger 172 is arranged so as to be retractable in an electromagnetic coil (not shown). When the power is turned on, the plunger 172 sinks. Further, a breaker 21 which is a circuit breaker is arranged inside the inspection port 7 at a position where it can be operated from the operation port 13.

FIG. 3 is a circuit diagram showing an electric circuit of the embodiment.

In FIG. 3, the positive and negative electrodes of the high voltage power source 5 are connected to the power source side terminals Bp and Bm of the two-pole breaker 21. One terminal Lp on the load side of the breaker 21 is connected to the load power supply circuit 23 and also to the electromagnetic mechanism 171 of the lock mechanism 17. The other terminal Lm on the load side of the breaker 21 is connected to a ground electrode such as the chassis. The other electrode of the electromagnetic mechanism 171 is also connected to the ground electrode.

The operation of such an embodiment will be described.

The inspection door 7 is covered with the inspection door 9 by closing the inspection door 9. Then, the breaker 21 is inserted through the operation port 13. Then, the power source side terminals Bp, Bm of the breaker 21 and the load side terminals Lp, Lm are connected, and the voltage of the high voltage power source 5 is applied to the electromagnetic mechanism 171 and the load power source circuit 23 of the lock mechanism 17. .. Therefore, a current flows through the electromagnetic mechanism 171 of the lock mechanism 17, and the plunger 172 overcomes the biasing force of the spring and sinks as shown by the solid line. Then, the tip of the plunger 172 engages with the engaging piece 170 to lock the inspection door 9. As a result, the inspection door 9 cannot be opened.

On the other hand, when the inspection door 9 is opened to inspect the high-voltage power supply 5 and the like, the operation port 13 is opened and the breaker 21 is shut off. Then, the power source side terminals Bp, Bm of the breaker 21 and the load side terminals Lp, Lm are disconnected, and the voltage of the high voltage power source 5 is applied to the electromagnetic mechanism 171 of the locking mechanism 17 and the load power source circuit 23. Disappear. Therefore, no current flows in the electromagnetic mechanism 171 of the lock mechanism 17, and the plunger 172 projects as shown by the dotted line by the biasing force of the spring. Then, the tip of the plunger 172 is disengaged from the engagement piece 170, and the inspection door 9 is unlocked. Thereby, the inspection door 9 can be freely opened. At this time, since no voltage is applied from the high-voltage power supply 5 to the load power supply circuit 23, the inverter device, and other auxiliary equipment, it is possible to inspect those devices without danger of electric shock.

FIG. 4 is a circuit diagram when the above-described embodiment is applied to an actual circuit.

In FIG. 4, for example, 25 12 [V] batteries are connected in series to form a 300 [V] high-voltage power supply 5. The output terminal of the high voltage power source 5 is connected to the power source side terminals Bp and Bm of the breaker 21. The load-side terminal Lp of the breaker 21 is connected to one terminal of the DC-DC converter 33 via the junction block 31, and the load-side terminal Lm thereof is grounded. The DC-DC converter 33 converts the voltage of 300 [V] into the voltage of 24 [V] and supplies it to the junction block 35. The junction block 35 is connected to the A terminal of the battery relay 37 via the load power supply circuit 23, and is also connected to the electromagnetic mechanism 171 of the lock mechanism 17. The B terminal of the battery relay 37 is connected to a load such as an auxiliary machine.

According to this circuit, if the breaker 21 is cut off, no high voltage is applied to the junction block 31 and no voltage is output from the DC-DC converter 33. Therefore, the voltage is applied to the electromagnetic mechanism 171 of the lock mechanism 17. Is not applied, the inspection door 9 is unlocked, and inspection can be performed safely.

5 and 6 show another embodiment of the present invention, FIG. 5 is a perspective view of the embodiment, and FIG. 6 is a circuit diagram of the embodiment.

In another embodiment shown in FIG. 5, for example, a high-voltage power source 5 of 300 [V], an inverter device, and an inspection door 9 that covers a portion of an inspection port 7 formed for inspecting other auxiliary machinery are provided. A protrusion 51 is provided at a predetermined position on the back surface, and when the inspection door 9 is closed, the switch mechanism 53 is fixed at such a position that the protrusion 51 is inserted into the hole 55 of the switch mechanism 53 which is the door opening detection means. However, an electromagnetic breaker 57 for connecting / disconnecting the load power supply circuit 23 connected to an auxiliary machine or the like to the high-voltage power supply 5 by turning on / off the switch mechanism 53 is provided.

In FIG. 6, the positive pole of the high voltage power supply 5 is connected to the power supply side terminal Bp of the electromagnetic breaker 57 and one end of the electromagnetic coil of the electromagnetic breaker 57, respectively. The negative pole of the high voltage power supply 5 is connected to the power supply side terminal Bm of the electromagnetic breaker 57 and one end of the switch mechanism 53. The other end of the electromagnetic coil of the electromagnetic breaker 57 is connected to the other end of the switch mechanism 53. The load-side terminal Lp of the electromagnetic breaker 57 is connected to the auxiliary machine via the load power supply circuit 23, and the load-side terminal Lm is connected to the ground electrode of the chassis or the like. The switch mechanism 53 includes a switch 59, an operating rod 63 for moving the contact 61 of the switch 59 on and off, and a spring 65 for urging the operating rod 63 so that the switch 59 is on the off side. The operating rod 63 is located inside the hole 55, so that the operating rod 63 is not accidentally pressed during the inspection. Further, the electromagnetic breaker 57 has its contacts closed when the electromagnetic coil 67 is excited and opened when the electromagnetic coil 67 is de-excited.

According to such an embodiment, when the inspection door 9 is closed, the protrusion 51 is inserted into the hole 55 of the switch mechanism 53, and the protrusion 51 pushes the operating rod 63, so that the switch The contact 61 of 53 is closed, the electromagnetic breaker 57 is excited, the contact of the electromagnetic breaker 57 is closed, and power can be supplied to the auxiliary machine via the load power supply circuit 23.

On the other hand, when the inspection door 9 is opened, the projection 51 thereof is disengaged from the hole 55 of the switch mechanism 53, and the operating rod 63 is moved to the right side in the figure by the urging force of the spring 65 to open the contact 61. As a result, the electromagnetic coil 67 of the electromagnetic breaker 57 is de-excited, and the contact of the electromagnetic breaker 57 is opened. Therefore, since a high voltage is not applied to the load power supply circuit 23, inadvertent electric shock or the like can be prevented.

It should be noted that, in the other embodiments described above, the operating rod 63 of the switch mechanism 53 is described as being provided inside the hole 55, but the operating rod 63 may be projected. In this case, it is not necessary to provide the projection 51 on the inspection door 9.

[0027]

【effect】

 As described above, according to the first aspect of the present invention, the inspection door cannot be opened unless the breaker operable from the operation port is operated to shut off and the high voltage is not applied to the load power supply circuit. In addition, it is possible to prevent electric shock due to carelessness and ensure safety during inspection.

Further, according to the second aspect of the invention, when the inspection door is opened, the electromagnetic switch shuts off and a high voltage is not applied to the load power supply circuit, so that electric shock or the like can be prevented. Therefore, the safety at the time of inspection can be improved.

[Brief description of drawings]

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

FIG. 2 is a side view showing a main part of the embodiment.

FIG. 3 is a circuit diagram showing a circuit of the embodiment.

FIG. 4 is a circuit diagram showing an example in which the same embodiment is applied to a specific circuit.

FIG. 5 is a perspective view showing another embodiment of the present invention.

FIG. 6 is a circuit diagram showing a circuit of another embodiment.

[Explanation of symbols]

 1 Vehicle 3 Exterior 5 High-voltage power supply 7 Inspection port 9 Inspection door 13 Operation port 15 Operation port lid 17 Lock mechanism 21 Breaker (breaker) 23 Load power circuit 51 Projection 53 Switch mechanism (door open detection means) 55 Hole 57 Electromagnetic breaker (electromagnetic) Switch)

Claims (2)

[Scope of utility model registration request] 1. A vehicle equipped with a high-voltage power supply and electric equipment, and an inspection door which is openably and closably attached to an inspection opening for inspecting the high-voltage power supply and electric equipment, and which has an operation opening for operation. A circuit breaker that is installed in a position that can be operated from the mouth and that shuts off the high-voltage power supply from the load power circuit, and locks the inspection door when the circuit breaker is closed when the inspection door is closed. A safety device for an inspection door, comprising a lock mechanism that unlocks the inspection door only when the inspection door is shut off. 2. In a vehicle equipped with a high-voltage power supply and an electric device, an inspection door that is openably and closably attached to an inspection port for inspecting the high-voltage power supply and the electric device, and a door opening detection that detects opening of the inspection door. A safety device for an inspection door, characterized by comprising: means and an electromagnetic switch for disconnecting the high voltage power supply from the load power supply circuit by the detection of the door opening detection means.