JP2002133979A - Safe plug box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a good safe plug box which can surely ensure safety during a maintenance work of a battery and electrical components. SOLUTION: The safe plug box 1 comprises: a box body 15 comprising a case 2 and a lid 10; the battery 20 accommodated in the box body 15; a power distributing box 25 connected to the battery 20 and required to be maintained; a voltage converter 35; and a safe plug 40 disconnecting or connecting a power line in the power distributing box 25. The safe plug 40 has a plug body 44 inserted in a mounting hole 28 for the safe plug on the power distributing box 25 through a inserting hole 11 on the lid 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety plug box, and more particularly, to a safety plug box capable of shutting off circuit current with a safety plug during inspection and maintenance of an electric vehicle or a hybrid vehicle having a high voltage circuit for driving a motor. It is about a plug box.

[0002]

2. Description of the Related Art In recent years, a vehicle having a high-voltage circuit for driving a motor, such as an electric vehicle or a hybrid vehicle, which has attracted attention as a low-pollution vehicle, and a vehicle having a high power supply voltage have been inspected and maintained. In such a case, it is necessary to temporarily cut off the circuit current in order to prevent an electric shock accident of the worker. Therefore, in a conventional electric vehicle or the like, as a circuit breaker for temporarily cutting off a circuit current, for example, Japanese Unexamined Patent Application Publication No. 9-22
A breaker device disclosed in Japanese Patent No. 3439 or the like has been proposed.

[0003] As shown in FIG. 7, the breaker device includes a pair of fixed electrodes 71 erected in a casing 70.
And a movable electrode (safety plug) 72 which is connected to and disconnected from the fixed electrodes 71 to disconnect or connect between the fixed electrodes 71.
A breaker switch is configured and its movable electrode 72
Is provided with a handle 73 for insertion / removal operation that can be tilted. A fuse 7 connected in series with the breaker switch is provided in the remaining space of the casing 70.
4 are accommodated.

That is, the movable electrode 72 is connected to both fixed electrodes 71.
, The breaker switch is turned on and the conduction path is conducted through the fuse 74. On the other hand, when checking or replacing the fuse 74 in the casing 70, or during vehicle maintenance such as checking or replacing a battery (not shown) and electric components (such as a power distribution box and a voltage converter) connected to the battery, the handle is not used. After the handle 73 is set up in the direction of the arrow (the position indicated by the imaginary line), the power supply path is cut off by pulling up the handle 73 and pulling out the movable electrode 72 from the fixed electrode 71, and electric shock due to contact of the tool with the body ground or the like. It is possible to prevent workers from being exposed to danger due to the occurrence of sparks or sparks.

[0005]

By the way, in the above-mentioned breaker device, the operator pulls up the handle 73 before moving or inspecting or replacing the battery and the electrical components connected to the battery and requiring maintenance. It is assumed that the power supply path is cut off by extracting the electrode 72 from the fixed electrode 71. Therefore, the operator can handle 7
If one forgets to pull up the movable electrode 72 from the fixed electrode 71 by pulling up the battery 3, maintenance work on the battery and electrical components is performed in a state where the power supply path is not interrupted, and safety of the worker cannot be secured. there is a possibility.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a good safety plug box which can ensure safety during maintenance work of batteries and electrical components.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to provide a box body comprising a case and a lid, a battery housed in the box body, an electrical component connected to the battery and requiring maintenance, and A safety plug box, comprising: a safety plug box for disconnecting or connecting a power supply path of a component, wherein the safety plug cuts off a power supply path of the electrical component prior to opening of the lid. Is achieved by

According to the above configuration, when the lid is opened for maintenance of the battery and the electrical components housed in the box body, the safety plug shuts off the power supply path of the electrical components before opening the lid. . Thus, when the lid is opened, the power supply paths of the battery and the electrical components in the box body are reliably shut off, and it is possible to reliably prevent the worker from being electrocuted during the maintenance work.

Preferably, the safety plug has a flange portion externally engaged with a plug insertion hole formed in the lid, and an electrical component inserted in the plug insertion hole and housed in the case. And a plug main body to which the power supply path can be connected. In this case, even if an attempt is made to open the lid with the safety plug attached, the flange of the safety plug hinders the lid from being opened. For this reason, the operator needs to pull out the safety plug before opening the lid, and does not forget to pull out the safety plug. Also, when the lid is forcibly opened without pulling out the safety plug, the safety plug is pulled out through the lid, so that the lid is not opened in a state where the power supply path is not shut off, and the lid is opened. When opened, the power supply path in the power distribution box is reliably shut off.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a safety plug box according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing a safety plug box according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of the safety plug box shown in FIG. 1, and FIG. 3 is a view of the safety plug box shown in FIG. It is a principal part expanded sectional view.

As shown in FIG. 1, the safety plug box 1 of the present embodiment has a box body 15 including a case 2 and a lid 10, a battery 20 housed in the box body 15, and a battery 20 connected to the battery 20. A power distribution box 25 and a voltage converter 35, which are electrical components requiring maintenance, and a safety plug 40 for disconnecting or connecting a power path 34 (see FIG. 4) in the power distribution box 25 are provided.

The case 2 is a substantially rectangular box having an open upper surface, and a screw hole 4 for screwing and fixing the battery 20, the power distribution box 25, the voltage converter 35, and the like to the bottom plate 3. (See FIG. 3). The substantially rectangular lid 10 covering the upper opening of the case 2 has a plug insertion hole 11 substantially at the center thereof.
2, the fitting groove provided in the peripheral portion is fitted to the upper opening edge of the case 2 as shown in FIG. 2.
As shown in FIG. 3, an annular step 12 is formed on an outer peripheral portion of the plug insertion hole 11, and an O-ring 13 is mounted on the annular step 12.

As shown in FIGS. 1 and 2, the battery 20 and the power distribution box 25 are connected via a conductor 21, and the power distribution box 25 and the voltage converter 35 are also connected to a conductor (not shown). Connected by still,
Although not shown, the power supply wiring distributed from the power distribution box 25 and the voltage converter 35 is drawn out of the case 2 via a waterproof grommet or the like, and is appropriately wired to the vehicle. 2 and 3, the battery 20, the power distribution box 25 and the voltage converter 35 are screwed and fixed at predetermined positions in the case 2 via screws 29 via the mounting portions 26 and 36. ing.

The power distribution box 25, which has a substantially rectangular parallelepiped shape, has a built-in safety plug connection housing. The upper surface of the lid 10 facing the plug insertion hole 11 in the case 2 has the safety plug 40 When the plug body 44 is inserted, a safety plug insertion hole 28 that allows connection of the power supply path 33 in the power distribution box 25 is formed (see FIG. 3). Further, a first terminal 33a is provided in the safety plug insertion hole 28 of the safety plug connection housing.
And the second terminal 33b are arranged vertically independently.

As shown in FIG. 3, the safety plug 40 has a long structure, and a leading end portion (the lower part in the figure) forms a cylindrical conductive plug body 44, and a rear end part (the figure shows a lower part). Above)
Form a disk-shaped insulating flange portion 41. A first multi-spring 51 and a second multi-spring 52 made of a conductive material are fitted on the outer periphery of the plug body 44 so as to be spaced apart in the axial direction. The flange portion 41 is provided in the plug insertion hole 1.
1 has an outer diameter larger than the inner diameter, and a knob portion 42 is integrally formed on the rear end side surface (upper surface in the figure), and the plug insertion hole 11 is formed on the front end side surface (lower surface in the figure). The fitting portion 43 to be fitted is integrally formed.

The safety plug 40 is inserted into the safety plug insertion hole 28 of the power distribution box 25 through the plug insertion hole 11 formed in the lid 10 of the box body 15 from above in the figure. 44 is inserted. When the safety plug 40 is completely inserted into the box body 15, the flange portion 41 engages with the plug insertion hole 11 from the outside, and the outer peripheral surface of the fitting portion 43 and the flange portion 41. The tip side surface of O is attached to the lid 10.
It has a waterproof structure that is in close contact with the ring 13 and seals between the safety plug 40 and the lid 10.

Here, the plug main body 44 is formed by the first multi-spring 51 and the second multi-spring 52 described above.
The power distribution box 2 is inserted into the cylindrical portions of the terminal 33a and the second terminal 33b so as to be in contact with each other.
The first terminal 33a and the second terminal 33b constituting the fifth power supply path 33 are electrically connected through the plug body 44.

When the plug body 44 is pulled out, the first multi-spring 51 and the second multi-spring 52
Is not in contact with the first terminal 33a and the second terminal 33b, and the electrical conduction between the two terminals is cut off, so that the power supply path 33 of the power distribution box 25 is cut off.

Therefore, in order to maintain the battery 20, the power distribution box 25 and the voltage converter 35 housed in the box body 15 in the safety plug box 1 of the present embodiment, it is necessary to open the lid 10. In order to open the lid 10, it is necessary to pull out the safety plug 40. That is, even if the lid 10 is to be opened with the safety plug 40 attached to the box body 15, the lid 10 cannot be opened because the flange portion 41 of the safety plug 40 is in the way.

For this reason, the worker needs to pull out the safety plug 40 before opening the lid 10, so that the worker does not forget to pull out the safety plug 40. Further, even when the lid 10 is forcibly opened without pulling out the safety plug 40, the safety plug 40 is pulled out through the lid 10, so that the power supply path 33 in the power distribution box 25 is not interrupted. The lid 10 is not opened, and when the lid 10 is opened, the power supply path 33 is securely shut off. Therefore, before opening the lid 10, the safety plug 4
0 is pulled out, the power distribution box 2
The power supply path 33 of No. 5 is surely shut off, and it is possible to surely prevent the worker from being electrocuted during the maintenance work.

Further, the safety plug box 1 of the present embodiment
According to the above, the box body 1 including the case 2 and the lid 10
5 has a waterproof structure, the battery 20, the power distribution box 25, and the voltage converter 35 housed in the box body 15 do not need the waterproof structure that has been individually implemented, and are collectively integrated in the box body 15. Can be waterproofed. Therefore, the above-described safety plug box 1
The waterproof structure can be simplified, and the manufacturing cost can be reduced.

Incidentally, the configuration of the safety plug box of the present invention is not limited to the configuration of the above embodiment, and it goes without saying that various configurations can be adopted based on the gist of the present invention. For example, the safety plug 50 shown in FIG.
An annular concave portion 45 is formed on the rear end side of the cylindrical plug main body 54. A pair of lock spheres 30, 30 engageable with the annular recess 45 are respectively provided in openings 32 formed in a direction perpendicular to the central axis of the safety plug insertion hole 28 of the safety plug connection housing. It is elastically urged by a compression spring 31 in a direction facing each other toward the central axis. In addition, about the component similar to the safety plug box 1 of the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

That is, the plug body 5 of the safety plug 50
When the lock spheres 4 are completely inserted into the safety plug insertion holes 28, the lock spheres 30 serving as locking means are inserted into the plug main body 5.
4 to engage with the annular recess 45 to lock the safety plug 50 in the inserted state. Therefore, the safety plug 50
Is prevented from inadvertently coming out of the safety plug insertion hole 28 due to running vibration of the vehicle or the like. In addition, the close contact state of the flange portion 41 with the O-ring 13 mounted on the lid 10 is reliably maintained, and the sealing performance is improved.

The safety plug 60 shown in FIG. 5 has a pair of engaging projections 65, 6 at the rear end of a cylindrical plug body 64.
5 are protrudingly provided. A pair of insertion grooves 61, 61 extending inward from the open ends corresponding to the engagement protrusions 65, 65 are formed in the inner peripheral wall 63 of the safety plug insertion hole 28 of the safety plug connection housing. A pair of introduction grooves 62, 62 extending in the same circumferential direction along the inner peripheral wall 63 from the lower ends of the insertion grooves 61, 61 are formed.

That is, the plug body 6 of the safety plug 60
When the plug 4 is inserted into the safety plug insertion hole 28, the pair of engagement protrusions 65, 65 are pushed into a predetermined position while being fitted into the insertion grooves 61, 61, and then the grip 42 is held. The plug 60 is rotated in the direction of the arrow, and as shown in FIG.
Locking is performed by moving the slider to a predetermined position in the back along lines 2 and 62.

Therefore, even if the lid 10 is to be opened before the safety plug 60 is pulled out, the locked flange portion 41 of the safety plug 60 interferes and the lid 10 cannot be opened. That is, in order to open the lid 10, it is necessary to rotate the safety plug 60 before opening the lid 10 so that the pair of engaging protrusions 65, 65 are aligned with the pair of insertion grooves 61, 61 and then withdrawn. Prior to opening the lid 10, the power supply path 33 in the power distribution box 25 can be reliably shut off.

When the safety plug 60 is locked, the lid 1
The flange portion 41 is urged upward by the elastic repulsive force of the O-ring 13 attached to the zero, and the safety plug 60 is lifted upward. Then, a pair of engagement projections 65, 65 are respectively pressed against the upper wall of the introduction groove 62, and the safety plug 6
Zero is prevented from being accidentally rotated by vibration or the like.

The locking means of the safety plug box according to the present invention is not limited to the structure shown in FIGS. 4 and 5, but may have various structures. Also, the configuration of the safety plug is not limited to the configuration of the above embodiment,
Various forms can be adopted as long as the power supply path of the electrical component that needs to be maintained and housed in the box body can be cut off before the lid is opened.

[0029]

As described above, according to the safety plug box of the present invention, when the cover is opened for maintenance of the battery and the electrical components housed in the box body, prior to opening the cover. A safety plug cuts off a power path of the electrical component. Thus, when the lid is opened, the power supply paths of the battery and the electrical components in the box body are reliably shut off, and it is possible to reliably prevent the worker from being electrocuted during the maintenance work. Therefore, it is possible to provide a good safety plug box that can reliably ensure safety during maintenance work of the battery and the electrical components.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a safety plug box according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of the safety plug box shown in FIG.

FIG. 3 is an enlarged sectional view of a main part of the safety plug box shown in FIG. 2;

FIG. 4 is a sectional view showing a safety plug of the safety plug box according to the present invention.

FIG. 5 is a front view showing a modified example of the safety plug in the safety plug box shown in FIG.

FIG. 6 is a perspective view showing another modified example of the safety plug in the safety plug box shown in FIG. 4;

FIG. 7 is a side view for explaining a conventional breaker device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safety plug box 2 Case 10 Lid 11 Plug insertion hole 15 Box body 20 Battery 25 Power distribution box 40 Safety plug 41 Flange part 44 Plug body

Claims (2)

[Claims] 1. A box body comprising a case and a lid,
A safety plug box comprising: a battery housed in the box body; an electrical component connected to the battery and requiring maintenance; and a safety plug for disconnecting or connecting a power supply path of the electrical component, wherein the safety plug box includes: However, the safety plug box shuts off a power supply path of the electrical component before opening the lid. 2. A flange portion in which the safety plug is externally engaged with a plug insertion hole formed in the lid, and a power supply for an electrical component inserted in the plug insertion hole and housed in the case. The safety plug box according to claim 1, further comprising a plug body connectable to a road.