JPH0840264A - Underfloor structure for vehicle - Google Patents

Abstract

PURPOSE:To discharge the hot air generated around a equipment by the air suction and discharge actions during traveling, by allowing an inspection cover to be easily demounted, securing the improvement of safety in the underfloor equipment maintenance inspection and installing a ventilating mechanism. CONSTITUTION:A hooking hinge 14 is formed on the reverse surface of an inspection cover 10 which is formed so that the side surface of an equipment box body 9 having underfloor equipment 16 built-in is used as a side skirt, and is supporting-fixed through a hinge shaft 11 installed at the upper edge of the equipment box body 9. Further, a vent hole is formed at the part above the hooking hinge 14 of the inspection cover 10, and an air stream is generated in the equipment chamber by the suction and discharge actions of the traveling wind, and the hot air generated around the equipment is discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor structure for a vehicle, and more particularly to a suitable underfloor structure for a vehicle in which equipment requiring inspection is installed in the underfloor portion of a vehicle body.

[0002]

2. Description of the Related Art Conventionally, an underfloor equipment room inspection lid mounting structure for a vehicle has a structure in which an inspection lid 5 formed also as a skirt as shown in FIGS. 3 and 4 is attached from a side beam 6 via a hinge 4. At the time of maintenance and inspection of the underfloor equipment, after opening the inspection lid 5, the inspection lid 5 is supported and fixed by a cylinder, a supporting rod 15, or the like.

Further, the inspection lid itself supported by the equipment box is installed in conformity with the outer peripheral position of the vehicle body so as to also serve as a skirt, and the gap between the equipment box and the underside of the underframe of the vehicle body can be opened and closed separately. A structure is known in which it is covered with a transparent lid member. As a related structure, for example, Japanese Patent Publication No. 1-37033 can be cited. Further, Japanese Patent Publication No. 5-17064 can be cited as an example of the structure in which a radiating hole is provided in the skirt in order to discharge the waste heat generated from the underfloor equipment to the outside of the vehicle.

[0004]

In the above-mentioned prior art, when the underfloor equipment is maintained and inspected, the support rod may accidentally come off,
There was a concern that the gas or liquid inside the cylinder would escape. In addition, depending on the installation location, the inspection lid cannot be fully opened, and the hinge attachment screw is removed and the inspection lid is removed according to the content of the inspection work. Therefore, improvement is required from the viewpoint of improving safety and work efficiency.

Further, among the above-mentioned prior arts, in the case where the inspection lid is used also as the skirt to simplify the structure, another lid member for covering the gap between the underfloor equipment and the underframe is required. However, sufficient consideration has not been given to the simplification of the structure. Further, regarding the structure for discharging the heat generated from the underfloor equipment, the skirt has a structure installed on the underframe, and no consideration is given to simplification of the structure.

An object of the present invention is to provide an underfloor structure in which an inspection lid can be removed by rotating a small range without exceeding the construction limit of a railway.

It is another object of the present invention to provide an underfloor structure which is capable of forming an air flow between the inside and outside of the equipment during traveling and discharging hot air generated around the equipment box.

Another object of the present invention is to provide an underfloor structure which can cover the side surface of the equipment box and the gap between the equipment box and the underframe with a single inspection lid.

[0009]

The above-mentioned object is to provide a structure in which a hooking hinge, that is, a detachable rotation supporting means is provided on the upper back surface of the inspection lid, and the inspection lid is installed on the hinge shaft provided on the upper surface of the underfloor equipment box. It is achieved by

The above-mentioned object is an underfloor structure of a vehicle in which an underfloor equipment box is installed on the underside of an underframe, and the underfloor equipment box is provided with an inspection lid on its side surface, and the inspection lid is a device constituting the underfloor equipment box. The inspection lid is rotatably installed in the box body, and the inspection lid is formed with a width above the center of rotation covering the gap between the underfloor equipment box and the underframe, and below the center of rotation the side surface of the equipment. This is achieved by being configured with a covering width.

[0011]

The inspection lid is supported and fixed by the rotation support means, and can be rotated and removed very easily. Further, if necessary, a ventilation hole is provided near the upper end of the inspection lid so that a flow of air is given to the inside of the equipment chamber by the action of inhaling and exhausting the traveling wind to exhaust hot air generated around the equipment. Therefore, according to the present invention,
During maintenance and inspection of underfloor equipment, the inspection lid can be easily attached and detached in a small space, and furthermore, a safe and efficient inspection lid attachment structure with a ventilation mechanism can be provided.

Further, since the inspection lid is formed in such a size as to cover the side surface of the device and the gap between the device and the underframe, it is possible to cover the entire lower part of the underframe with one inspection lid, which simplifies the structure. It can be realized.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an underfloor structure according to the present invention will be described with reference to FIGS. In the figure, 16 is a main circuit or a high-voltage auxiliary device, which is a general device for high-speed vehicles such as a converter, a controller, a current transformer, and a distribution box.
All of these devices are housed in a waterproof device box main body 9 and are hung in the rail direction via an attachment metal 13 on an underframe 8 forming the vehicle body. The side surface of the equipment box body 9 on the side surface of the vehicle body in the vehicle width direction is formed to have an open structure. The side opening of the equipment box body 9 is the underframe 8
The inspection lid 10 formed to also serve as the side skirt disposed below the cover is waterproofed by packing or the like to be closed in a sealed state. Therefore, the inside of the equipment box has a closed structure.

The inspection lid 10 has a vertical width dimension in the installed state that can cover the lower side of the underframe 8 to the lower side of the equipment box body 9. That is, the upper end portion of the inspection lid 10 has a width dimension capable of covering the gap formed between the upper side of the equipment box body 9 and the lower side portion of the side beam forming the underframe 8. In addition, the portion below the upper end portion of the inspection lid 10 is
The width dimension is configured to cover the side opening of the device box body 9.

The inspection lid 10 is provided with a hook hinge 14 as a rotation support means at a position corresponding to the vicinity of the upper edge of the equipment box body 9 and on the back surface thereof. The hook hinge 14 is structured so as to engage with a hinge shaft 11 fixed to the upper edge upper surface of the equipment box body 9, and the inspection lid 10 rotates around the hinge shaft 11. The lower portion of the inspection lid 10 is structured to be fixed to the lower edge portion of the equipment box body 9 by a fixture such as a latch provided on the inspection lid 10 itself. A ventilation hole 12 is provided in a portion above the hook hinge 14 of the inspection lid 10 and is provided with a ventilation mechanism.

The hook hinge 14 has an opening along its surface in the downward direction, that is, in the direction of the track when the inspection lid 10 is fixed, and the hinge shaft 11 is removed through this opening. The inspection lid 10 can be removed from the equipment box body 9. Further, with the lower end of the inspection lid 10 fixed to the lower edge of the equipment box body 9, the upper end of the inspection lid 10 is in contact with the lower side of the side beam forming the underframe 8. The vibration of the upper end portion of 10 is supported by the hook hinge 14 and brought into contact with the side beams to prevent the vibration.

In such a structure, the inspection lid 10 is
At the time of maintenance and inspection of the underfloor equipment 16, the lower fixture is removed, and the hinge shaft 11 is rotated to a small range, that is, the upper end of the inspection lid 10 is moved to a position where it is out of contact with the lower edge of the side beam of the underframe 8. The inspection lid 10 can be easily removed by moving it and shifting the inspection lid 10 upward. In addition, since the ventilation hole 12 is formed in the upper portion of the inspection lid 10, the ventilation hole 12 is installed continuously or intermittently along the longitudinal direction of the vehicle body, and when traveling, for example, in front of the center of the vehicle body. Inspection lid 10 attached to the side
Inhalation from the ventilation hole 12 of the, inspection lid 10 attached to the rear side
It is possible to form an air flow in the equipment chamber 17 such as discharging from the ventilation hole 12 to discharge hot air around the equipment box body 9 and prevent the temperature rise in the underfloor portion.

Since the inspection lid 10 is supported by the hinge shaft 11 installed on the upper edge of the equipment box body 9, the inspection lid 10 is attached to the side beam portion of the underframe 8. Since it is not necessary to provide a money receiver or a frame for supporting the structure, the structure can be simplified. Further, the inspection lid 10 has a function of not only closing the side opening of the equipment box main body 9 but also closing the gap between the equipment box main body 9 and the underframe 8, and conventionally the lid members are separately provided. The structure can be simplified compared to the one in which is installed. Since the inspection lid 10 has the ventilation holes 12 formed above the hook hinges 14, the installation positions of the hook hinges 14 and the ventilation holes 12 do not overlap with each other, and a sufficient opening area or strength can be obtained. Can be secured.

The lower end of the inspection lid 10 has an equipment box main body 9
In the state of being fixed to the lower edge by the fixing tool, the lower end is fixed by the fixing tool, the middle part is fixed by the hook hinge 14 and the upper end by contacting the side beam of the underframe 8, so that a strong support is provided. It is possible to prevent the generation of vibration noise.

[0020]

As described above, according to the present invention, the inspection lid can be easily removed, and the safety at the time of maintenance and inspection of underfloor equipment can be improved. Further, by providing the ventilation mechanism, it is possible to discharge hot air around the equipment box due to the suction and discharge of air during traveling. further,
The underfloor structure including the underframe and the equipment box body can be simplified.

[Brief description of drawings]

FIG. 1 shows an embodiment of an underfloor structure according to the present invention.
FIG. 9 is a cross-sectional view corresponding to the section AA of FIG.

FIG. 2 is an enlarged cross-sectional view of portion B in FIG.

FIG. 1 is a side view of a high speed vehicle.

FIG. 4 is a cross-sectional view of a conventional underfloor structure corresponding to a portion AA in FIG.

[Explanation of symbols]

1 ... Body, 2 ... Horizontal beam, 3 ... Equipment box, 4 ... Hinge, 5 ...
Inspection lid, 6 ... Side beam, 7 ... Side beam, 8 ... Side beam, 9 ... Equipment box, 10 ... Inspection lid, 11 ... Hinge shaft, 12 ... Vent hole,
13 ... Mounting metal, 14 ... Hook hinge, 15 ... Support rod,
16 ... Equipment main body, 17 ... Equipment room.

Claims (3)

[Claims] 1. In an underfloor structure of a vehicle in which an underfloor equipment box is installed on a lower surface of an underframe, the underfloor equipment box is provided with an inspection lid on a side surface thereof, and the inspection lid is an equipment box main body constituting the underfloor equipment box. The inspection lid is rotatably installed so that the upper part of the inspection cover covers the gap between the underfloor device box and the underframe, and the lower part of the inspection cover covers the side surface of the device. The underfloor structure of the vehicle, which is characterized in that 2. The underfloor structure for a vehicle according to claim 1, wherein the inspection lid is provided with a ventilation hole at an upper portion thereof for communicating the inside and outside of the inspection lid. 3. The underfloor structure for a vehicle according to claim 1 or 2, wherein the inspection lid is installed on the main body of the equipment box by a detachable rotation support means. .