JPH0734477A - Cover for underground buried article - Google Patents

Abstract

PURPOSE:To permit a valve body to be inserted into a key hole and prevent the release of lock at all times, even if a cover for the underground buried article is buried in an inclined ground, by installing a valve body energized to a key hole side by a coil spring, etc., on the reverse surface of the valve body. CONSTITUTION:An L-shaped valve body 1 is axially supported in a turnable manner by a supporting shaft 1b on the reverse surface of a cover body (a). A valve cover 1a at one edge part of the valve body 1 is inserted into a key hole 2 from the lower side, and the key hole 2 is closed. While, an engagement piece 1d at the other edge part of the valve body 1 is engageds with the engagement piece b' of a frame body (b). At this time, the valve cover 1a is positioned in the key hole 2 at all times by a weight 1c, and the slip-off of the engagement piece 1d is prevented. Further, th whole valve body 1 is energized in the direction for closing the key hole 2 by the action of a coil spring 3. Even if the cover body (a) is embedded in an inclined ground, the locked state can be maintained by the urging force of the coil spring 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for an underground buried object provided in a room for an underground buried object such as a water shutoff valve, and more particularly to a lid suitable for being buried in a sloping ground.

[0002]

2. Description of the Related Art Conventionally, a lid of a lid for an underground buried object of this type is provided with a key hole into which a hook bar is inserted when the lid is opened. In addition, the keyhole is normally closed by inserting the valve lid of the valve body provided on the lid body and preventing the lid body from being opened carelessly. A locking mechanism is provided.

A conventional valve body will be described with reference to FIG.
The valve body 1 is provided with a valve lid 1a which is inserted from below into a keyhole 2 provided in a part of the periphery of the lid body a.

That is, the valve body 1 is L-shaped, has a valve lid 1a at one end, and has a central portion pivotally supported by a support shaft 1b on the back side of the lid a and the other end. The portion is provided with a weight 1c and an engaging piece 1d which is engaged with a locking piece b'provided on the frame body b. Therefore, the valve body 1 is always kept by the weight 1c.
a can be placed in the keyhole 2, and
The locking piece b'and the engaging piece 1d can be engaged with each other. Further, when a hook bar (not shown) is inserted into the keyhole 2, it can be rotated about the support shaft 1b to allow the insertion of the hook bar.

Although not shown, a hinge mechanism is provided between the cover body a and the frame body b on the side opposite to the keyhole 2 to connect them.

[0006]

However, in the above-mentioned conventional underground lid, the valve body is rotated by the weight so that the keyhole is closed, and the lock mechanism can be locked. Therefore, when the lid for the underground buried object is buried in the sloping ground, the weight may move, the keyhole may not be closed by the valve body, and the lock may be released.

A further explanation will be given with reference to FIG.
Assuming that the ground G is tilted downward to the right with respect to the horizontal line L, the valve body 1 rotates around the support shaft 1b, and the valve body 1a is completely inserted into the keyhole 2 as indicated by the chain double-dashed line. Not only is it not inserted, but the engagement piece 1d separates from the locking piece b '.

Therefore, the present invention has been made in order to solve the above-mentioned drawbacks, and an object thereof is to keep the valve body completely in the keyhole even when the lid for the underground buried object is buried in the sloping ground. It is intended to provide a lid for an underground buried object which is inserted and the lock cannot be unlocked.

[0009]

In order to achieve the above-mentioned object, a lid for an underground buried object according to the present invention is rotatably pivoted on the back surface of the lid, and one of them is centered on the pivot. At the end,
It has a valve lid that is inserted into a keyhole provided in the lid and covers the keyhole, and has an engaging piece and a weight that engage with a locking piece provided in the frame at the other end. A lid for an underground buried object which is provided with a valve body, and when the lid body is kept in a horizontal state, the valve lid is inserted into the key hole and the locking piece and the engaging piece engage with each other. In the above, a spring is provided between the back surface of the lid body and the valve body, and on the opposite side of the valve lid centering on the shaft support.
Further, the spring is a coil spring, and is characterized by having coil portions on both left and right sides.

[0010]

In the above construction, the spring acts so as to cover the valve lid at all times, that is, to cover the keyhole even if the lid body is inclined. Also,
When the valve lid covers the keyhole, the engagement piece of the valve body and the locking piece of the frame body engage with each other to maintain the locked state.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the same components as those of the above-described conventional device will be described using the same reference numerals.

FIG. 1 is a vertical sectional view of a keyhole portion of a cover for an underground buried object according to an embodiment, and FIG. 2 is an enlarged side view of the valve body 1 as seen from the direction of arrow A in FIG.

The valve body 1 is rotatably supported by a frame on the back surface of the lid body a by means of a support shaft 1b (see FIG. 2), and has a keyhole provided at one end portion in the lid body a as in the conventional case. 2 is provided with a valve lid 1a which is inserted from the lower side and has a size that covers the keyhole 2. Further, a weight 1c is provided at the end portion of the valve body 1 as in the conventional case, and the frame 1b side of the weight 1c extends to the inner peripheral wall of the frame b and has an upward engaging piece 1d. It is provided.

The weight of the weight 1c is determined so that the valve lid 1a can rotate toward the keyhole 2 when the lid a is kept horizontal.

A downward locking piece b'is provided on the inner peripheral wall of the frame b facing the engaging piece 1d of the valve body 1, and the valve lid 1
When a is located in the keyhole 2, both pieces 1d, b '
Are engaged with each other to keep the lid a in a locked state.

A coil spring 3 having coil portions 3a and 3b on the left and right sides of the valve body 1 on the side opposite to the valve lid 1a around the support shaft 1b, as shown in an enlarged view in FIG.
The pair of foot portions 3c and 3d are fastened with screws. The top 3e of the coil spring 3 is in contact with the back surface of the lid a. Further, the valve body 1 that abuts the coil spring 3 is provided with a recess 4 to form an escape when the coil spring 3 is bent.

When the underground buried object lid having the above construction is buried in the horizontal ground G, the valve lid 1a is inserted into the keyhole 2 by the weight 1c in a predetermined manner. Even in this case, the coil spring 3 may urge the valve lid 1a toward the keyhole 2 side.

By the way, the lid for the underground buried object is shown in FIG.
As shown in FIG. 3, it is assumed that the ground is buried in a sloped land that descends to the right with respect to the horizontal line L. In this case, if the coil spring 3 is not present, the valve lid 1a is disengaged from the keyhole 2 due to the gravity of the weight 1c, and the engagement piece b'and the engagement piece 1d are disengaged. The valve lid 1a has a keyhole 2
It can be biased to the side to cover the keyhole 2 as desired. Moreover, the engagement between the two pieces 1d and b'will not be disengaged, and the locked state can be maintained.

When the lid a is opened, a hook rod (not shown) is inserted into the keyhole 2. At this time, the valve body 1 rotates counterclockwise around the support shaft 1b against the coil spring 3. . At this time, the coil spring 3 bends, but the bend is effectively absorbed by the depression 4, so that the valve body 1 is smoothly rotated.

By rotating the valve body 1, the engagement between the two pieces 1d and b'is released, and the lid a can be removed from the frame b.

As described above, since the underground buried object lid according to this embodiment uses the coil spring 3, the valve lid 1a will not come off from the keyhole 2 even if it is buried in a sloping ground.
In addition, the engagement between the two pieces b'and 1d can be held and the locked state can be maintained. In addition, since the coil spring 3 has coil portions 3a and 3b on both left and right sides,
A force uniformly acts on the valve body 1, and the valve body 1 can be smoothly rotated.

[0022]

INDUSTRIAL APPLICABILITY The underground buried object lid according to the present invention has a spring provided between the back surface of the lid and the valve element and on the opposite side of the valve lid centering on the shaft support. Even if it is done, the keyhole can be covered with the valve lid in a predetermined manner and the locked state can be maintained. Further, when the spring is a coil spring and the coil portions are provided on both left and right sides, the valve body can be smoothly rotated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a keyhole portion of a cover for an underground buried object according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of the valve body as seen from the direction of arrow A in FIG.

FIG. 3 is an enlarged view of a coil spring.

FIG. 4 is a vertical sectional view of a conventional lid for an underground buried object.

[Explanation of symbols]

 a lid body b frame body b'locking piece 1 valve body 1a valve lid 1b spindle 1c weight 1d engaging piece 2 keyhole 3 coil spring 4 recess

Claims (2)

[Claims] 1. A valve lid that is rotatably supported on the back surface of the lid and is inserted into a key hole provided in the lid at one end centered on the pivot to cover the key hole. And a valve element having a weight and an engaging piece that engages with a locking piece provided on the frame body at the other end, and when the lid body is kept in a horizontal state, The valve lid is inserted into the keyhole,
Further, in the underground buried object lid in which the locking piece and the engaging piece are engaged with each other, between the back surface of the lid body and the valve body, and centering around the shaft support, A lid for an underground buried object, which is provided with a spring on the opposite side. 2. The lid for an underground buried object according to claim 1, wherein the spring is a coil spring and has coil portions on both left and right sides.