JPH0647972Y2 - Cover frame structure for underground structures - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a lid frame structure for an underground structure, and more specifically, an iron lid frame such as a manhole iron lid, a fire hydrant iron lid, and a water meter iron lid. Opening and closing structure for.

(B) Conventional Technology As an example of a conventional lid frame structure for underground structures of this type, there is the one described in Japanese Utility Model Publication No. 57-58296.

That is, as shown in FIGS. 8A and 8B, the frame structure for an underground structure described in this publication basically has a lid 2A and a frame 3A that supports the lid. And a receiving seat 5A protruding from the inside of the frame and having a locking hole 4A, and a rod-like shape, the upper part of which is swingably attached to the edge of the lid 2A, and the trunk part locks the receiving seat 5A. Inserted in the hole 4A so that it can move up and down and rotate.
The lower part is composed of a seat 5A and a connecting rod 6A that is in abutting engagement with the seat 5A, and the lid 2A can be opened by horizontal swiveling or vertical inversion.

The lid 2A has a pair of plate-shaped ribs 7A and 8A facing each other on the lower surface thereof, and an L-shaped notch groove (a horizontal groove and a downwardly inclined portion open from the horizontal portion are opened on the facing surface of these ribs). The connecting rod 6A is provided with a pair of pins projecting in the back direction on the upper side thereof, and these pins are detachably engaged with the L-shaped notch groove. The connecting rod 6A is pivotally supported on the lid 2A.

(C) Problems to be solved by the device However, in the one disclosed in Japanese Utility Model Publication No. 57-58296, when the lid 2A is opened, the two peripheral portions 23A and 24A are in contact with the inner peripheral surface of the frame 3A. And you can not open the lid smoothly,
When the two peripheral portions 23A and 24A come into contact with the frame 3A, the lid 2
By horizontally moving A toward the front, the lid is vertically inverted and opened.

(D) Means and Actions for Solving the Problem The present invention has a rod body, a frame body for supporting the lid body, a seat projecting inside the frame body and provided in a locking hole, and a rod shape. ,
The upper part is swingably attached to the edge part, the trunk part is vertically movably and pivotally inserted into the locking hole of the seat, and the lower part is composed of a connecting rod which is in abutting engagement with the seat. A lid frame structure for an underground structure capable of opening the lid by horizontal turning or vertical inversion, wherein the lid extends downward from a lower surface of the lid and a pair of plate-shaped ribs facing each other, and these ribs. And a pair of projections that project from the facing surfaces of the ribs, and the connecting rod has a pair of sliding surfaces on its upper surface that slide on the facing surfaces of the ribs, respectively. Is detachably engaged with each sliding surface, thereby pivotally supporting the connecting rod on the lid, and further, the receiving seat is formed to project from the upper surface thereof.
The lid frame structure for an underground structure is provided with a pair of protrusions that abut on each rib of the lid when the lid is opened and move the lid upward.

That is, the present invention is characterized mainly in that the upper surface of the receiving seat projectingly provided inside the frame is made to project instead of having a planar structure.

With this feature, according to this feature, the vertical reversal of the lid can be opened smoothly in one operation, and it is possible to prevent the risk of closing the lid and damage to each component due to the recoil caused by the catch when the lid is opened.

In this invention, the pair of protrusions formed on the seat are
It is preferable that it is provided from the center side of the inner surface of the receiving frame to the end of the seat so as not to contact the pair of plate-shaped ribs profitable on the lower surface of the lid when the lid is closed. It is preferable that the side surface has a substantially triangular shape. The height of the triangle is preferably about 1/3 of the thickness of the lid to about the height of meat stealing on the lower surface of the lid, and more preferably about 1/2 of the thickness of the lid.

(E) Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.
The invention is not limited to this.

First, in FIG. 1, a lid frame structure 1 for underground structure (gate valve) is provided with a lid body 2, a frame body 3 supporting the lid body, and a locking hole 4 projectingly provided inside the frame body. It is mainly composed of a receiving seat 5 having a and a connecting rod 6. The connecting rod 6 has its upper portion swingably attached to the edge portion of the lid body 2, the trunk portion is vertically movably and pivotally inserted into the locking hole 4 of the receiving seat 5, and the lower portion is received. 5, the lid body 2 can be opened relative to the frame body 3 by horizontal rotation or vertical inversion.

In particular, the lid body 2 extends downward from the lower surface of FIG. And a pair of frustoconical projections 10 and 11.

On the other hand, a seat 5 having a locking hole 4 projecting inside the frame
In FIG. 5 (A) and (B), the upper surface is provided with a pair of protrusions 20 and 21 having a substantially triangular side surface in the longitudinal direction of its upper surface.

After connecting the lid body 2 and the connecting rod 6, the lower end of the connecting rod 6 is inserted into the locking hole 4 of the receiving seat 5 provided inside the frame body [7.
(Refer to (A) in the figure], and attach the stopper 17 so that the stopper 17 does not come into contact with the catch 5 and pull out even if the connecting rod 6 is pulled upward by 90 ° with the lid 2 [Refer to (B) in FIG. 7]. . Lid 2,
When the connecting rod 6 and the frame body 3 are joined and the lid body 2 is closed, the state shown in FIG. 1 is obtained. Therefore, the protruding portions 20 and 21 provided on the seat 5 and the ribs 7 and 8 provided on the lower surface of the lid body 2 do not abut when the lid body 2 is closed.

In the opening process of the vertical reversal of the lid body 2, as shown in FIG. 6, the end portions of the ribs 7 and 8 of the lid body 2 are protruded portions 20 and 21 of the seat 5.
By contacting each other and moving the lid 2 to a higher position to prevent contact with the inner peripheral surface of the receiving frame when the lid is opened,
Enables smooth opening operation.

(F) Effect of the Invention According to this invention, the pair of protrusions formed on the upper surface of the seat having the locking holes projecting inside the frame body allows the lid body to be opened when the lid is vertically inverted. Raises the fulcrum of rotation, which allows a smooth opening of the lid.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of an essential part showing a state in which the lid is opened, and FIG.
The figure is a longitudinal cross-sectional view of a main part showing a state in which the lid and the connecting rod are combined, FIG. 4 (A) is a partial longitudinal cross-sectional view of the lid, and FIG. 4 (B) is a partial bottom view thereof. FIG. 5A is a vertical cross-sectional view of the seat portion of the frame, FIG. 5B is a partial side view of the same, FIG. 6 is a vertical cross-sectional view of an essential part of the lid during opening, and FIG. FIG. 8 (A) is a longitudinal sectional view showing another embodiment in the middle of opening, and FIG. 8 (B) is a plan view thereof. 1 ... Underground structure lid frame structure, 2 ... Lid body, 3 ... Frame body, 4 ... Locking hole, 5 ... Seat, 6 ... Connecting rod, 7,8 ... Plate rib 17 …… Stopper, 20,21 …… Projection

Claims (1)

[Scope of utility model registration request] 1. A lid body, a frame body for supporting the lid body, a seat projecting inside the frame body and provided in a locking hole, and a rod shape,
The upper part is swingably attached to the edge part, the trunk part is vertically movably and pivotally inserted into the locking hole of the seat, and the lower part is composed of a connecting rod which is in abutting engagement with the seat. , A lid frame structure for an underground structure that can be opened by horizontally turning or vertically reversing, wherein the lid extends downward from a lower surface of the lid, and a pair of plate-shaped ribs facing each other are provided. A pair of protrusions that project from the facing surfaces of the ribs, and the connecting rod has a pair of sliding surfaces on its upper surface that slide on the facing surfaces of the ribs. The projection is detachably engaged with each sliding surface, thereby pivotally supporting the connecting rod on the lid body, and further, the seat is formed so as to project from the upper surface thereof, and each rib of the lid body is opened when the lid body is opened. And a lid frame structure for an underground structure, which comprises a pair of protrusions that respectively come into contact with each other and move the lid upward.