JPS5823728Y2 - Engine compartment door seal in rear engine bus - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an engine compartment door seal that can reduce noise leaking from the engine compartment of a rear engine bus.

In a rear engine bus, in order to facilitate maintenance and inspection of the engine and the like, an opening is provided in the body forming the engine room, and a door called a so-called inspection lid is attached to this opening.

In order to reduce the noise leaking from the engine room in such a rear engine bus, it is of course necessary to take measures against the sound source, but it is also necessary to install an angu cover that covers the bottom of the sound source, or , it is necessary to improve the sound insulation properties of the door.

Therefore, in the past, a flange was provided at the opening of the body that overlapped with the inner surface of the periphery of the door, and a seal rubber attached to this flange was brought into contact with the door to achieve sound insulation between the body and the door. Various proposals have been made to increase the height, but in this case where part of the body and part of the door overlap in the inside and outside directions, the opening area of the opening when using doors of the same shape Since it becomes smaller, there is a drawback that it causes problems in maintenance and inspection work of engines etc.
Furthermore, if the required opening area is to be ensured, the door becomes large, which poses problems in terms of strength or disadvantages in terms of cost.

This invention aims to eliminate these conventional drawbacks and provide a door seal with a simple structure that can reliably seal between the body and the door and prevent noise leakage without damaging the opening area of the body. That is.

Hereinafter, this invention will be described in detail based on embodiments shown in the accompanying drawings.

In the figure, 1 is the body of a rear engine bus,
As in the past, it is composed of a body outer panel 2 and a body structural material 3, forming a button and an engine room 4.

Further, an opening 5 for performing maintenance and inspection of the engine and the like is formed in the body 1, and a flange 3a facing the inside of the engine room 4 is formed at the inner edge of the opening 5.

The flange 3a may be formed as a part of the body structure 3 as shown in the embodiment, or may be formed by extending the opening edge of the body outer plate 2 toward the inside of the engine room 4, although not shown. The flange 3a may be formed by bending, twisting, or a separate member.

Reference numeral 6 denotes a door that covers the opening 5, and is supported by a hinge T connecting the negative side edge of the door to one of the body structural members 3 so as to be rotatable in opening and closing.

A flange portion 6a facing the inside of the engine room 4 is provided on the periphery of the door 60, and the outer periphery of the seal rubber 8 attached to the flange portion 6a is connected to the flange 3a. The gap between the body 1 and the door 6 is sealed by being brought into pressure contact with the inner circumferential surface of the door 6.

In the embodiment shown in FIG. 2, the outer circumferential edge of the door 6 is folded back to the inner surface, and the folded edge of the door 6 is made to stand up in a substantially orthogonal direction to form a flange portion 6a. The outer circumferential edge of the seal rubber 8 adhesively fixed to the outer circumferential surface is brought into pressure contact with the flange 3a, but as in the embodiment shown in FIG. 3, the circumferential edge of the door 6 is bent inward at a right angle. Alternatively, a flange portion 6a may be formed, and the outer peripheral edge of the seal rubber 8 fitted and bonded to the flange portion 6a may be brought into pressure contact with the flange 3a.

In both embodiments, the flange portion 6a is connected to the door 6.
Although the flange portion 6a is formed integrally with the door 6 to reinforce the door 6, the flange portion 6a may be formed of a reinforcing member. Of course, it is sufficient to attach sound-absorbing materials or the like.

Further, the contact distance between the flange 3a and the flange portion 6a and the pressure contact force of the seal rubber 8 may be determined in consideration of the size of the door 6, the structure of the seal rubber 8, the noise level of the sound source, etc.

When a button is pressed on the door seal having such a configuration and a second inspection of the engine or the like is performed, the door 6 is rotated outward to open the opening 5, as in the conventional case.

At this time, since the opening 5 is not provided with a seal rubber or a flange supporting the seal rubber as in the conventional case, a sufficient opening area can be secured even if the body width is limited.

When the door 6 is closed upon completion of the maintenance 2 inspection work,
The flange part 6a formed on the inner peripheral edge of the door 6 enters the inner peripheral part of the flange 3a, and the seal rubber 8 attached to the flange part 6a deforms and comes into contact with the inner peripheral surface of the flange 3a. Seal between.

Therefore, the seal rubber 8 prevents noise from leaking to the outside through the space between the flange 3a and the flange portion 6a from a sound source such as the engine, thereby reducing the external noise level.

Further, when the door 6 is closed, the seal rubber 8 is elastically deformed in a direction parallel to the plate surface direction of the door 6. Therefore, the seal rubber 8 moves the door 6 toward the body 1 in the direction of the plate surface direction. Since the positioning is restrained in the vertical and horizontal directions, even if the hinge 7 becomes loose during long-term use, the relative position between the door 6 and the body 1 can be maintained constant. The locking operation can be easily performed, and even if the closing rotation position of the door 6 shifts in the inward/outward direction due to misalignment of the locking mechanism, the seal rubber 8 can always be brought into pressure contact with the flange 3a. It is possible to seal stably and reliably over a long period of time.

As explained above, the door seal according to this invention has an extremely simple structure and can reliably seal between the body and the door without damaging the opening area of the opening provided in the body. It is possible to reduce the noise that tends to leak out of the engine room without impairing the efficiency of maintenance and inspection work.

[Brief explanation of the drawing]

Figure 1 is a rear view of a rear engine bus equipped with an embodiment of this invention, Figure 2 is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a
It is a cross-sectional view corresponding to the ■-■ cross section showing the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Body, 3a...Flange, 4...Engine room, 5...Opening, 6...Door, 6a...Flange part, 8...Seal rubber

Claims (2)

[Scope of utility model registration request] (1)! La the engine room of Jya engine bus
A flange portion facing the inside of the engine room is provided on the inner periphery of the door, and a flange with an inner periphery facing the outer periphery of the flange portion is provided on the inside of the opening edge of the body, and the outer periphery of the flange portion is A door seal for an engine room in a rear engine bus, characterized in that the attached seal rubber is elastically deformed in a direction parallel to the plate surface of the door, and its outer peripheral edge is brought into pressure contact with the inner peripheral surface of the flange. (2) The door seal for an engine room in a rear engine bus according to claim 1, wherein the flange portion is integrally formed with the peripheral edge of the door.