JPH0540122Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an improvement of a switching device for an opening in an underground facility.

B. Conventional technology An example of a conventional device of this type is
The hinge shown in Publication No. 38371 is bent into a crank shape in plan view and L-shaped in side view. One end of the crank shape is slidably supported in a horizontal elongated hole provided in a receiving frame, and the other end is supported in a horizontal elongated hole provided in a receiving frame. It was slidably supported in a horizontal slot in the lid. Also, another example is Akira Jitsukai.
In the device shown in Japanese Patent No. 55-88453, the shaft portion of the hinge on the receiving frame side is rotatably supported by a hinge support portion protruding from the receiving frame.

C. Problems to be solved by the invention According to the above conventional method, in the above case, the hinge support piece (first protrusion) for forming the long hole on the receiving frame side is large in the receiving frame hole because the hole is long in the horizontal direction. It will be installed protrudingly. Therefore, it becomes a hindrance for people to get in and out and things to take in and out, which reduces the effectiveness of the opening.In addition, the shaft part of the hinge on the receiving frame side cannot move in the vertical direction.
There is a drawback that not only is an excessive load applied to the hinge during opening and closing of the lid, but also there is a danger that the lid will swing in a direction perpendicular to the opening/closing direction (left and right).

In the latter case, an excessive load is applied to the shaft portion of the hinge on the receiving frame side during opening and closing of the lid, resulting in a large hinge, wasting material, and increasing costs.

The present invention solves these problems and provides an opening/closing device for underground facility openings that does not apply excessive force to the hinge during the operation of opening and closing the lid, eliminates side-to-side shaking of the lid, and enables smooth opening and closing. The purpose is to

D. Means for solving the problems In order to achieve the above object, the structure of the present invention is as follows. That is, a pair of left and right receiving frame side hinge support pieces having a vertically long groove and a flat top surface higher than the lid receiving step are integrally formed on the inside of the receiving frame main body having the lid receiving step integrally formed on the inner surface. The outer edge rib is integrally suspended from the outer periphery of the cover plate, and the outer edge rib is cut out at a portion corresponding to the hinge support piece on the side of the receiver frame. In this part, there is a lid on which a pair of left and right lid-side hinge support pieces with horizontally long holes are hung, and both ends are slidable into the grooves or holes of the lid-side hinge support pieces on the receiving frame side, respectively. The receiving frame side shaft portion and the lid side shaft portion are arranged in parallel, and when the lid is opened, these two shaft portions are connected by an inverted L-shaped connecting portion when viewed from the side, forming a hinge when viewed from above. .

E. Function When the lid is opened, the lid rotates while its peripheral surface is supported by the top surface of the hinge support piece on the receiving frame side. Then, when opened at 90 degrees from the horizontal, the lid rests securely on the hinge support piece, and is rotated 180 degrees to open while being supported by the hinge support piece at the peripheral corner and the lid surface by the main body of the receiving frame. When the lid is closed, the order is reversed.

F. Example Hereinafter, an example of the present invention will be described based on the drawings.

1 to 3 relate to rectangular openings.
As shown in the figure, the opening/closing device consists of a receiving frame 10, a lid 20, and a hinge 30 to which these two are assembled, and the lid 20 can be opened by rotating 180 degrees in one direction with respect to the receiving frame 10 via the hinge 30. . Here, the closing direction of the lid is defined as the front (left side in Figure 1), the opening direction is defined as the rear (right side in Figure 1), and the left and right sides facing the opening direction are defined as left and right.

Therefore, the receiving frame main body 11 which becomes the outer shell of the receiving frame 10
A lid receiving step portion 12 is integrally formed on the inner surface of the housing. The lid receiving step part 12 of the rear piece of the receiving frame main body 11 is cut out, and a pair of left and right rectangular parallelepiped receiving frame side hinge support pieces 13a and 13b, which are long in the vertical direction, are provided protruding from these parts. The height of the hinge support piece is higher than the lid receiving step portion 12, and is set to such a level that a slight gap can be secured between the hinge support piece and the lid 20 when the lid is closed, and the top surface is flat. Furthermore, vertically long grooves 13c are provided on both hinge support pieces 13a and 13b to face each other, and the groove 13c of the right hinge support piece 13b is continuous with a hole 13d penetrating left and right in its upper part.

In the closed state, the lid 20 includes a rectangular flat lid plate 21, an outer edge rib 22 integrally formed to hang down on the outer periphery of the lid plate, and a portion of the outer edge rib corresponding to the receiving frame side hinge support piece 13 that is cut out. A pair of lid-side hinge support pieces 2 are installed vertically from the lid plate 21 at this portion and are parallel to the frame-side hinge support pieces 13.
4 and 24, and a reinforcing rib 23 surrounding these hinge support pieces 24 and connected to the outer edge rib 22. The outer edge rib 22 has a height such that the upper surface of the lid plate 21 is at the same height as the top surface of the main body of the receiving frame 10 when supported by the lid receiving stepped portion 12 of the receiving frame 10.
Further, each of the lid-side hinge support pieces 24 is provided with a horizontally long hole 24a penetrating in the left-right direction.

Next, the hinge 30 is connected to the hollow shaft 31a of the receiving frame side shaft portion 31 and the lid side shaft portion 3, as shown in FIGS.
2 are arranged in parallel, and both shaft parts are connected to an L-shaped connecting part 33.
As a result, it is integrally molded into a shape when viewed from above in the lid open state, and the pivot 31b is inserted through the hollow shaft 31a. The pivot 31b is the support frame side hinge support piece 13
It is supported slidably in the vertical direction between long grooves 13c and 13c between a and 13b. The pivot 31b is inserted through the through hole 13d of the right hinge support piece 13b,
A retaining piece 34 is attached to a ring groove 31c provided on the other left side of the shaft (left side in FIG. 4), and
The hollow shaft 31a is prevented from coming off by bringing its one (right) side end surface into contact with the one (right) side hinge support piece 13b. Further, the other (left) end of the pivot shaft 31b is restricted by the groove bottom surface of the other (left) side hinge support piece 13a and is prevented from moving to the other side. Therefore, the movement of the hinge 30 along with the hollow shaft 31a in the left-right direction is restricted. Both ends of the lid-side shaft portion 32 are inserted into the long holes 24a, 24a of the lid-side hinge support pieces 24, 24, and are supported slidably in the length direction of the holes. The L-shaped connecting portion 33 is bent into an inverted L shape when viewed from the side with the lid open.

In the above, the lid opening/closing state will be explained. As shown in FIG. 1, in the closed state, the lid 20 is supported by the lid holder step part 12, but the holder frame side hinge support piece 13 is
Since they are located in the space surrounded by the reinforcing ribs 23 of the lid 20, they do not come into contact with each other, and the receiving frame side shaft portion 31 maintains the lower limit position, and there is no space between the shaft portion and the lid side hinge support piece 24. A gap is ensured and the two do not touch.

When the lid starts to be opened and the lid 20 is rotated around the hinge side, the lid moves the peripheral edge surface 21a of the lid plate near the reinforcing ribs 23 to the hinge support piece 13 on the frame side.
The hinge is rotated while being in contact with the top surface of the hinge support piece 13, and is securely supported on the hinge support piece 13 when opened at 90 degrees from the horizontal. After that, as the lid opens, the lid plate 2
1 is in contact with the upper surface of the main body 11 of the receiving frame 10,
The load on the lid 20 is gradually transferred from the hinge support piece 13 on the receiving frame side to the receiving frame main body 11 as the lid rotates 180 degrees, and is finally supported by the ground plane A to complete the opening of the lid.

When the lid is closed, the lid 20 is closed in the reverse order to the above.
The load is transferred from the receiving frame main body 11 to the lid receiving step portion via the hinge support piece 13. During these lid opening/closing operations, the receiving frame side shaft portion 31 of the hinge 30 and the lid side shaft portion 3
2 slide through the elongated grooves 13c and the elongated holes 24a, so the load of the lid 20 is not applied to the hinge 30 at all.

The switchgear of the present invention can also be applied to underground facilities with round openings.

C Effect of the invention As described above, in the opening/closing device of the present invention, the receiving frame is integrally formed with the lid receiving stage part and a pair of receiving frame side hinge support pieces whose top surfaces are flat inside the receiving frame main body, and the lid is provided with the lid receiving step. Since the lid side hinge support piece is provided with a plate and an outer edge rib, and the lid side hinge support piece is vertically installed at a position corresponding to the support frame side hinge support piece, the load of the lid is sequentially transferred to the lid support step part and the support frame side hinge support piece during opening/closing operation. One side is supported by the receiving frame body.

In addition, each pair of support frame side support piece and lid side support piece is provided with a long groove in the vertical direction and a hole that is long in the horizontal direction when the lid is open. Since both end portions of the receiving frame side shaft portion and the lid side shaft portion are slidable, the load of the lid is not applied to the hinge and the hinge is not twisted. Therefore, the lid does not swing from side to side, opening and closing is smooth and safe, and the hinges and hinge support pieces can be made small in size, so it is expected that materials will be saved and costs will be reduced. moreover,
Since the hinge support piece on the receiving frame side does not protrude inward of the opening, there are many advantages such as no reduction in the effectiveness of the opening.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention with the lid closed, Fig. 2 is a longitudinal sectional view of main parts with the lid open, Fig. 3 is a perspective view of Fig. 2, and Fig. 4 is a hinge. FIG. 10... Receiving frame, 11... Receiving frame main body, 12... Lid holder stepped portion, 13... Receiving frame side hinge support piece, 20...
Lid, 21... Lid plate, 22... Outer edge rib, 24...
Lid side hinge support piece, 30... Hinge, 31... Receiving frame side shaft portion, 32... Lid side shaft portion, 33... L-shaped connecting portion.

Claims (1)

[Scope of utility model registration request] A vertically long groove and a pair of left and right receiving frame side hinge support pieces each having a flat top surface higher than the lid receiving step are integrally formed on the inside of the receiving frame main body having a lid receiving step integrally formed on the inner surface thereof. A receiving frame and an outer edge rib that is supported by the lid receiving step portion of the receiving frame in a closed state are integrally suspended from the outer periphery of the cover plate, and the outer edge rib has a portion notched in a portion corresponding to the hinge support piece on the receiving frame side. In this part, there is a lid on which a pair of left and right lid side hinge support pieces with horizontally long holes are vertically installed, and both ends are slidable into the grooves or holes of the lid side hinge support pieces on the receiving frame side, respectively. The receiving frame-side shaft portion and the lid-side shaft portion are arranged in parallel, and when the lid is open, these two shaft portions are connected by an inverted L-shaped connecting portion when viewed from the side to form a hinge when viewed from above. Opening/closing device for underground facility openings.