JPH093948A - Locking device for shielding lid - Google Patents

Abstract

PURPOSE: To facilitate the assembly of a locking device to a shielding lid and to make the locking device applicable also to a sliding type shielding lid. CONSTITUTION: The parts of a locking device to be attached to a shielding lid 8 are enclosed in a storage casing 20 to constitute a locking casing unit 19, which is fixed to a predetermined position of the shielding lid 8. The locking casing unit 19 is designed so that it can be mounted without projecting onto the lower surface of the shielding lid 8 at all, thus making the unit 19 applicable to both a shielding lid that is lifted and opened and a sliding type shielding lid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for locking a shield cover such as a manhole cover or a pavement inspection port cover, which prevents the shield cover from being unnecessarily opened.

[0002]

2. Description of the Related Art Shielding lids such as manhole lids and pavement inspection opening lids are attached by mounting a peripheral edge on a receiving frame provided along an opening edge. By the way, if this shielding lid is unnecessarily opened due to mischief, etc., there is a danger that people and vehicle wheels will fall into the open manhole and pavement inspection entrance, and it will lead to an accident.
For shield lids that are attached to the inspection openings of underground wiring such as power lines and communication lines, if the shield lid is opened without permission and the wiring is cut off, damage will be serious and must be prevented. I have to.

Therefore, various locking devices for the shield lid for connecting and fixing the shield lid to the receiving frame have been proposed.

FIG. 7 shows the structure of a conventional locking device as an example thereof, which is positioned below a screw hole b into which an opening / closing handle is screwed when the shielding lid a is opened and closed. A bolt insertion hole d is formed in the bottom wall c, a lock bolt e is inserted into the insertion hole d from above to project it to the lower surface side, and a disc spring washer f is fitted to the projecting end and a rotating body g
The fixing pin i is press-fitted from the side to fix the rotating body g to the lock bolt e. The rotating body g is provided with a locking piece j projecting laterally from the outer circumference thereof, and the rotating body g is rotated by a rotating operation on the head of the lock bolt e, so that the locking piece j is received. The lower surface of the is releasably engaged to obtain a locking action.
In addition, a mortar stopper plate n that prevents the inflow of mortar and forms an engagement gap m during construction is fixed to the lower surface of the receiving frame k with which the locking piece j is engaged, with a screw o.

[0005]

In the conventional locking device represented by such a configuration, the number of parts is large, and the individual parts must be assembled to the shielding lid a according to a predetermined procedure. There is a problem that the work is troublesome and takes time.

Further, since the rotating body g provided with the locking piece j projects to the lower surface side of the shield lid a, the shield lid a is slid along the slopes formed on the left and right inner edges of the receiving frame k. When it is attached to a so-called slide opening / closing type shield lid a that opens and closes, the rotating body g protruding to the lower surface side is caught by the receiving frame k and cannot be opened and closed when the shield lid a slides open and close. Therefore,
There is also a problem that the conventional locking device cannot be applied to such a slide opening / closing type shield lid a.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a locking device for a shielding lid which can solve the above-mentioned conventional problems.

[0008]

According to the present invention, an insertion opening is opened in a side wall of a shielding lid mounted on a receiving frame attached along an opening edge of a manhole, a pavement inspection opening, or the like, and the opening is opposed to the insertion opening. While forming an engagement groove in the side wall of the receiving frame, a bottomed locking hole to which a shielding cap is detachably attached is provided on the upper part of the housing that can be fixed to the shielding lid, and the housing further. In the side surface facing the insertion opening, a long hole that communicates with the locking hole from the circumferential direction is opened, and in the locking hole, there is provided a rotating operation part on which the locking tool is detachably engaged, and A locking housing unit is configured by rotatably housing a rotating body having an engaging piece protruding laterally from the elongated hole and formed on the outer periphery, and the locking housing unit is fixed to the inner edge of the side wall of the shielding lid. Then, by rotating the rotating body, the engaging piece is projected from the insertion opening of the shielding lid. A locking position engaging the engaging groove of the receiving frame by, it is characterized in that arranged to be converted into the unlocking position disengaged from the engaging groove.

[0009]

By configuring each of the locking housing units by accommodating the respective parts of the locking device attached to the shielding lid in the housing, the locking housing unit can be assembled simply by fixing the locking housing unit to the shielding lid. .

Further, the locking piece is provided so that the engaging piece of the rotating body is projected laterally from the insertion opening opened in the side wall of the shielding lid so as to be engaged with the engaging groove formed in the side wall of the opposing receiving frame. Since it can be attached without protruding to the lower surface side of the shielding lid, it can be applied to a slide opening / closing type shielding lid.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

1 and 2 are drawings showing the structure of a manhole or a paved floor inspection port to which the present invention is applied. Reference numeral 1 is a manhole or paved floor inspection in which a rectangular receiving frame 2 is attached to an opening edge. Shows compartments such as mouth. The receiving frame 2 has a mounting piece 5 projecting upward from an inner edge of a base plate portion 4 of a side wall 3 surrounding an outer periphery, and an outer edge of the base plate portion 4 is fixed to a peripheral wall upper surface 7 of the partition wall 1 by a plurality of bolts 6. It

A shielding lid 8 for shielding the upper opening of the partition wall 1
Has a rectangular side wall 9 whose outer periphery is substantially the same as the inner periphery of the side wall 3 of the receiving frame 2, and a bottom wall 10 formed under the side wall 9.
Is formed into a shallow-bottomed housing by means of and, and the lower surface outer peripheral portion thereof is mounted on the mounting piece 5 to which the cushioning material 11 is adhered and supported by the receiving frame 2.

As shown in FIG. 1, the inside of the shielding lid 8 is filled with a mortar 13 together with a paving finishing material 12 such as a block or a decorative tile laid around the receiving frame 2 during construction. .

The shielding lid 8 filled with the pavement finishing material 12 and the mortar 13 has a considerable weight, and it is difficult to lift and open it. Therefore, in the receiving frame 2,
As shown by the broken line in FIG. 1, slopes 14 that slope from the lower part of one end of the receiving frame 2 to the upper part of the other end are formed on the inner edges of the side walls 3 on both the left and right sides. 8, engagement holes 15, 15 arranged on both sides of the front part
The shield cover 8 can be slid in the front-rear direction along the slope 14 to be opened and closed by an opening / closing handle engaged with.

Next, the main part of the present invention will be described with reference to FIGS.

On the side wall 9 of the shielding lid 8 located at the front side of the shielding lid 8 in the opening direction, a horizontally long insertion opening 16 is opened at a central lower position, and the receiving frame 2 facing the insertion opening 16 is provided. A laterally long engagement groove 17 which is substantially similar to the insertion port 16 is formed in the side wall 3. The engagement groove 17 is formed so as to penetrate the side wall 3, and a shielding plate 18 for preventing the inflow of the mortar 13 that is placed on the outer periphery of the side wall 3 at the time of construction is fixed to the outside of the engagement groove 17.
Instead of using the shield plate 18, a concave groove-shaped engagement groove 17 may be formed on the inner surface of the side wall 3. In this case, the shield plate 18 is fixed by screwing, welding or the like. No work required.

On the other hand, at the inner edge of the side wall 9 of the shielding lid 8, a lock housing unit 19 is arranged inside the insertion opening 16. Storage housing 20 that constitutes the locking housing unit 19
Is the left and right side plates 21a, 21 that surround the periphery except the front surface.
a and the rear side plate 21b, and a rectangular top plate 22 that shields the upper part are formed in a housing shape. This housing 20
Includes attachment pieces 23, 23 protruding laterally from the lower portions of the left and right side plates 21a, 21a.
23 is fixed to the bottom wall 10 by fixing means such as screwing or welding.
The storage housing 20 is fixed to the shielding lid 8 by being mounted on the top. Further, the height dimension of the storage housing 20 is set so as to substantially match the upper edge of the shielding lid 8 in the fixed state.

An insertion hole 25 for a locking tool 24 is formed in the top plate 22 of the housing 20. Further, at the lower part of the top plate 22, a cylindrical body 27 having a locking hole 26 therein which communicates with the insertion hole 25 is continuously provided in the vertical direction. An elongated hole 28, which communicates with the locking hole 26 from the circumferential direction, is opened in a side surface of the cylindrical body 27 facing the insertion opening 16 of the shielding lid 8. Further, the bottom portion of the cylindrical body 27 is shielded by the bottom plate 29 so that the locking hole 26 has a bottomed shape.

A female screw 3 is provided on the inner periphery of the upper portion of the locking hole 26.
0 is formed, and the shielding cap 31 of the insertion hole 25 is detachably screwed to the female screw 30.

A cylindrical rotating body 33 having an engaging piece 32 protruding from the outer periphery is housed in the locking hole 26 so as to be horizontally rotatable, and the engaging piece 32 of the rotating body 33 is inserted into the cylindrical body. It is made to project laterally from the elongated hole 28 of 27 and is inserted into the insertion port 16 of the shielding lid 8. Further, a sand removing hole 36 communicating with the locking hole 26 is formed in the cylindrical body 27 at a height position corresponding to the upper end surface of the rotating body 33, and the sand is discharged from the sand removing hole 36 to remove the locking hole. The sand that has entered the inside 26 is prevented from accumulating on the upper end surface of the rotating body 33.

On the upper part of the rotating body 33, a rotation operating portion 34 having a prismatic projection shape is formed, and a square groove 35 formed at the tip of the locking tool 24 is detachably attached to the rotation operating portion 34. Accordingly, the rotating body 33 can be rotated. By the turning operation of the turning body 33, the engagement piece 32 is projected from the insertion opening 16 of the shielding lid 8 to be engaged with the engagement groove 17 of the receiving frame 2, and the engagement position is disengaged from the engagement groove 17. It will be converted to the unlock position.

In such a structure, the lock housing unit 19
Is fixed to the shielding lid 8 by fixing the housing 20 to a predetermined position of the inner edge of the side wall 9 of the shielding lid 8, that is, the side edge of the top plate 22 is in close contact with the inner edge of the side wall 9 and the engaging piece of the rotating body 33. 32 is the shielding lid 8
It is completed by mounting the mounting pieces 23, 23 of the housing 20 on the bottom wall 10 by using a fixing means such as screwing or welding in a state where the mounting pieces 23, 23 of the storage housing 20 are held at a position where they can be projected outward from the insertion opening 16. .

As described above, the locking housing unit 19 fixed on the bottom wall 10 of the shielding lid 8 includes the engaging piece 32 of the rotating body 33.
Since the and other parts do not project to the lower surface of the shielding lid 8 at all, it is possible to slide the shielding lid 8 to open and close it.

In the embodiment, the structure in which the locking hole 26 for housing the rotating body 33 is provided inside the cylindrical body 27 has been described. However, the locking hole 26 is formed integrally with the housing 20 so that the cylindrical body 27 is formed. It can be formed without using. Further, the rotation operating portion 34 is formed in the shape of a square groove instead of the prismatic protrusion, and the prismatic protrusion is formed on the locking tool 24, or the rotation operating portion 34 is formed as a groove in which a driver or the like can be engaged. May be. Further, if the side edge of the top plate 22 of the housing 20 that is in close contact with the side wall 9 is formed in an arc shape, it can be used for a round shield lid.

[0026]

As described above, according to the present invention, each component of the locking device attached to the shielding lid 8 is housed in the housing 20 to form the locking housing unit 19, so that the locking housing unit 19 is covered. Assembling can be performed easily and in a short time only by fixing it at a predetermined position.

Further, the lock housing unit 19 includes a rotating body 33.
Since the engaging piece 32 and other parts of can be attached to the lower surface of the shielding lid 8 without projecting at all, it is of course applicable not only to the shielding lid which is lifted up and opened but also to the slide opening and closing type shielding lid. It has excellent effects such as application.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a shield lid and a receiving frame to which the present invention is applied in a construction state.

FIG. 2 is a plan view of the above-mentioned shielding lid and receiving frame.

FIG. 3 is a side sectional view of an essential part of the present invention.

FIG. 4 is a plan view of a main part of the present invention.

FIG. 5 is a cross-sectional plan view of an essential part of the present invention.

FIG. 6 is a perspective view of a rotating body and a locking tool.

FIG. 7 is a side sectional view of a conventional configuration.

[Explanation of symbols]

 2 Receiving frame 3 Side wall 8 Shielding lid 9 Side wall 16 Insertion port 17 Engagement groove 19 Locking housing unit 20 Storage housing 26 Locking hole 28 Long hole 31 Shielding cap 32 Engaging piece 33 Rotating body 34 Rotating operation part

Claims (1)

[Claims] 1. An insertion opening is formed in a side wall of a shielding lid mounted on a receiving frame provided along an opening edge of a manhole, a pavement inspection opening, or the like, and is engaged with a side wall of the receiving frame facing the insertion opening. While forming a groove, a bottomed locking hole to which a shielding cap is detachably attached is provided on an upper part of a housing that can be fixed to the shielding lid, and a side surface facing the insertion opening of the housing. In addition, a long hole that communicates with the locking hole from the circumferential direction is opened, and a turning operation portion to which a locking tool is detachably engaged is provided in the upper part inside the locking hole, and the locking operation part projects laterally from the long hole. A locking housing unit is configured by rotatably storing a rotating body in which an engaging piece protruding from the outer periphery of the locking housing unit is fixed to the side wall inner edge portion of the shielding lid.
A locking position in which the engaging piece is projected from the insertion opening of the shielding lid and engaged with the engaging groove of the receiving frame by a rotating operation of the rotating body,
A locking device for a shielding lid, which is provided so as to be convertible to an unlocking position where it is disengaged from the engagement groove.