JPH0641998A - Locking device for underground structure - Google Patents

Abstract

PURPOSE:To prevent easy opening of a cover by fitting a projecting engaging part and a locking member inside a receiving frame to receive a cover body, providing a locking piece having a lower inserting hole on the extreme end to be inserted by a tool on a locking member, providing a receiving shelf to receive the locking piece, and providing an upper inserting hole on the cover body and an intermediate inserting hole on the receiving shelf for inserting the tool into the lower inseting hole. CONSTITUTION:In the blockading condition, the locking hook 6a on the extreme end of a tool 6 is inserted into a cavity 10 through an upper inserting hole 9, and inserted into a lower inserting hole 7 through an intermediate inserting hole 11, then by changing the direction of the blade by 90 degrees and pulling up the tool, engagement of a locking member 5 is released, and by successively pulling up the tool 6 in this condition, the process is shifted to a cover opening work. Specified directions are respectively set in the upper, intermediate, and lower inserting holes so as to prevent easy inserting of the tool 6. Hereby, easy opening of the cover body can be effectively prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention causes a situation in which a lid such as a human-hole iron lid is opened by a third party for no legitimate reason, or is accidentally removed due to an unexpected force. The present invention relates to a locking device for underground structures that prevents

[0002]

2. Description of the Related Art A mechanism and device for locking a lid for the above-mentioned purpose is, for example, a utility model application publication No. 18 of 1952.
No. 740 to Jitsuko Sho 60-19159, No. 62-45
It is publicly known as seen in Japanese Patent Publication No. 94, etc. These use the inner peripheral edge of the receiving frame that receives the lid as an engaging portion for locking, and a locking member that engages therewith is provided below the outer edge of the lid, and is configured to be locked by closing the lid. There is. Further, unlocking is usually performed by inserting a hand key or the like through a prying hole or a hand key hole provided in the lid.

However, in the conventional method, there is no difficulty in inserting the rod into the keyhole or the like, and when the rod is inserted and operated, there is a problem that even a person who does not know the mechanism can unlock the rod. After unlocking, it is easy to open the lid,
As a result, illegal entry into the manhole, dumping of objects, theft of the lid, etc. may occur. Further, if there is overflow from the manhole, the problem of lifting the lid easily occurs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to prevent a lid such as a human-hole iron lid from being easily opened. Yes,
For that reason, the unlocking method should not be easily detected.

[0005]

In order to solve the above-mentioned problems, according to the present invention, it is possible to engage with and disengage the engaging portion 3 of the receiving frame 2 for receiving the lid 1 which projects into the receiving frame. Has a locking member 5 pivotally supported by a support shaft 4 on the lower outer edge of the lid body 1, and a lower insertion hole 7 into which a tool 6 having a locking hook can be inserted and locked at the tip thereof. A locking piece 8 integrally provided with the tool, an upper insertion hole 9 formed in the lid 1 so that the tool 6 can be inserted to lock the tool 6 in the insertion hole 7, and a locking piece pulled up by the tool 6. 8 is provided, and a receiving rack 12 having an intermediate insertion hole 11 into which the tool 6 can be inserted is provided.

Further, the tool 6 can be installed in the space 10 through the upper insertion hole 9, is locked by the lock seat 13 provided on the receiving rack 12, and substantially closes the intermediate insertion hole 11 in the locked state. A removable locking body 14 can be provided to prevent the insertion of the.

A lock seat 1 in which a locking body 14 is provided on a receiving shelf 12
It is no longer possible to insert tools into the interior from the upper insertion hole, since it is locked in 3 and thereby the intermediate insertion hole 11 is substantially closed.

Therefore, the tool 6 cannot be used unless the locking body 14 is unlocked. In addition, if the direction of the insertion hole is combined with this, unlocking and opening the lid becomes even more difficult.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Figure 1
The first embodiment shown in FIG. 5 is a so-called manhole device including a lid 1 having a circular planar shape and a receiving frame 2 that receives the lid 1. The lid 1 and the receiving frame 2 are tapered fitting surfaces. The engagement edge 3 is fitted downward at the end of the engaging portion 3 with an inverted L-shaped cross section, and a protruding edge 20 for preventing biting is provided on the inner periphery below the fitting surface so as to project inward. It is provided.

The locking member 5 is pivotally supported on the lower outer edge of the lid 1 by a support shaft 4 for engagement and disengagement with the engaging portion 3, and swings outward and inward in the radial direction of the lid 1. It is possible. The locking member 5 can be engaged with the engaging portion 3 by a lower outward hook 5a, and a locking piece 8 protruding inwardly in the middle portion.
The engaging piece 8 also functions as a weight and pushes the hook 5a toward the engaging portion 3. The outside of the hook serves as a guide surface 21, and when the lid 1 that has been opened is closed, the locking member 5 is automatically evaded inward by coming into contact with the protruding edge 20 and then placed in the engaged state.

When the locking piece 8 swings inward,
An inner side is inclined downward so that it can be stably contacted with a lower surface of a receiving shelf 12 described later, and a lower insertion hole 7 is formed therein into which a tool 6 inserted from above can be inserted and locked. Has been done. The tool 6 has a blade 6 at the tip in a direction intersecting with the axis.
As a result of providing the locking hook 6a having b, there is directionality. Therefore, the lower insertion hole 7 is also elongated in the tangential direction of the lid 1, for example.

The upper insertion hole 9 is formed in the lid 1, and its position is set above the central axis of the lower insertion hole 7 in the closed state (see FIG. 2). The planar shape of the upper insertion hole 9 is different from the lower insertion hole 7 and the cross-sectional shape of the tool tip portion in which a rectangular shape is provided on both sides of a small circle, which is an ellipse elongated in the radial direction of the lid 1. Therefore, there is also an effect that the shape of the tool used is erroneous.

The intermediate insertion hole 11 is formed in the above-mentioned receiving rack 12 and is oriented in a direction different from the upper insertion hole 11 by approximately 90 degrees. The lid 1 having the receiving rack 12 and the upper insertion hole 9
A space 10 is provided between and, in which the orientation of the inserted tool tip 6a can be changed. Further, the position where the receiving rack 12 is provided is set to a position where the locking piece 8 pulled up by the tool 6 can be received. In the case of the receiving rack 12 of the embodiment, it is formed in an upward U-shaped cross section surrounding the upper insertion hole 9 from below, and the inside thereof is the void 10.

The intermediate insertion hole 11 is formed to have substantially the same planar shape as the lower insertion hole 7 and has the same direction as that of the lower insertion hole 7, but is approximately 90 in relation to the upper insertion hole 9.
Facing different directions. By thus providing the upper, middle and lower insertion holes 9, 11, and 7 with directivity, the insertion of the tool 6 can be prevented.

Therefore, in the closed state shown in FIGS. 1 and 2, the tip engaging hook 6a of the tool 6 is inserted from the upper insertion hole 9 into the space 10, and then the intermediate insertion hole 11 and the lower insertion hole. 7 can be inserted (Fig. 3), the direction of the 90 degree blade can be changed (Fig. 4), and the locking member 5 can be disengaged by further pulling it (Fig. 5). If you lift it, you will move to lid opening work. When the upper insertion hole 9 is narrower than the width of the locking hook 6a at the tip of the tool and the locking hook 6a is inserted in the longitudinal direction of the upper insertion hole 9, the inserted locking hook 6a is inserted. Can be rotated around the axis in the space 10 to match the orientation of the intermediate insertion hole 11.

A second embodiment according to the present invention will be described with reference to FIGS. The locking device according to the second embodiment relates to the invention described in claim 2, in which a detachable locking member 14 for preventing the insertion of the tool 6 is provided in the configuration of the above embodiment. Therefore, the same reference numerals are used for the components common to the first embodiment mainly including the lid 1 to the receiving rack 12, and the detailed description is omitted.

First, the receiving rack 12 is provided with a lock seat 13. The lock seat 13 may be of any type as long as the locking body 14 can be locked (fixed), but in the embodiment, it is screwed onto the receiving rack 12 so as to project into the empty space 10 and has a head shape. It is a stud type having a lock portion 18 of.

The lock body 14 has a lock piece 17 at the bottom which is locked to the lock seat 13, is attachable / detachable from the upper insertion hole 9, and has a size and shape so as to substantially fill the space 10. . The part that fits into the upper insertion hole 9 is an openable / closable key lid 15, which is pivotally supported at the end by the lock body.
The upper insertion hole 9 opens the lid. Reference numeral 16 is a tightening tool, which has the key lid 15 fastened to the locking body 14 and can be attached and detached by a square wrench 25 or the like.

A lock such as a cylinder lock is used for this locking body 14, and it is locked and unlocked by a key 26 which is inserted into the key hole closed by the key lid 15, and the locking piece 17 at the inner and lower portions is locked by the locking. Engages with the lock portion 18 of the lock seat 13,
The locking body 14 is fixed so that it cannot be removed.

Incidentally, 27 is a support shaft of the key lid 15, 28 is a fitting chamber formed on the lower surface of the locking body, and the lock seat 13 is fitted from below. 29 is a push spring 30 on the top surface of the fitting chamber 28.
Shows the screw with attached. The push spring 30 pushes up the locking body 14 when unlocking, facilitating removal.

According to the apparatus of the second embodiment, in the closed and locked state, the inside of the upper insertion hole 9 is almost filled with the key lid 15 of the locking body 14 (FIG. 7). Unless the 14 is removed, neither the tool 6 nor the rod can be inserted. The locking body 14 can be removed with the key 26,
In the case of the embodiment, since the key hole is hidden by the key lid 15 and the key lid 15 is tightened to the locking body 14 by the tightening tool 16, it cannot be removed without special tools.
Further, there is no risk of water infiltrating through the key hole, and since the upper insertion hole 9 itself and the locking body 14 are substantially blocked, foreign matter is less likely to enter. The locking body 14 is not damaged because it falls. After removing the locking body 14, unlocking with the tool 6,
The operation of opening the lid is the same as in the case of the first embodiment.

[0022]

Since the present invention is configured and operates as described above, it is possible to effectively prevent the lid 1 such as a human-hole iron lid from being opened. Especially when the locking body 14 is used in parallel, it is even impossible to insert tools into the lid through the upper insertion hole 9, and special tools and keys are required to remove the locking body 14, so special technology is used. It can be said that there is no risk of opening the lid unless it is done. Therefore, there is an effect that it is possible to prevent the situation where the lid body 1 is opened or comes off.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a vertical sectional view.

FIG. 3, FIG. 4, and FIG. 5 are cross-sectional views illustrating the operation.

FIG. 6 is a perspective view of a second embodiment.

FIG. 7 is a vertical sectional view.

FIG. 8 is a perspective view of a lock body.

FIG. 9 is a vertical sectional view of the above.

FIG. 10 is a cross-sectional view illustrating the operation.

[Explanation of symbols]

 1 Lid 2 Receiving Frame 3 Engagement Part 4 Spindle 5 Locking Member 6 Tool 7 Lower Insertion Hole 8 Locking Piece 9 Upper Insertion Hole 10 Cavity 11 Intermediate Insertion Hole 12 Shelf 13 Lock Seat 14 Locking Body 15 Key Lid 16 Tightening Tool 17 Lock piece 18 Lock part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 591043581 2-8-1, Nishishinjuku, Shinjuku-ku, Tokyo (72) Inventor Hirotaka Nagashima 2-19, Nakamachi, Kawaguchi City, Saitama Prefecture (72) Inventor Oda Masayoshi 691, Maruta, Kazutsukikuma, Hakata-ku, Fukuoka-shi, Fukuoka Prefecture Hino Water Supply Equipment Co., Ltd. (72) Inventor Seiji Karasawa 690-6 Sanuki-cho, Ryugasaki-shi, Ibaraki

Claims (4)

[Claims] 1. A lid 1 for opening and closing an opening of an underground structure, and a receiving frame 2 provided for receiving the lid.
And a locking member 5 pivotally supported on the lower outer edge of the lid 1 so as to be engageable with and disengageable from the engaging portion 3 protruding inside the receiving frame, and a locking hook at the tip. Insert tool 6,
A locking piece 8 having a lockable lower insertion hole 7 and provided integrally with the locking member 5, and a lid 1 formed to be insertable for locking the tool 6 into the insertion hole 7. With an upper insertion hole 9 and a receiving shelf 12 having an intermediate insertion hole 11 into which the tool 6 can be inserted and which is provided at a position where the locking piece 8 pulled up by the tool 6 can be received. Locking device for structures. 2. A lid 1 for opening and closing an opening of an underground structure, and a receiving frame 2 provided for receiving the lid.
And a locking member 5 pivotally supported on the lower outer edge of the lid 1 so as to be engageable with and disengageable from the engaging portion 3 protruding inside the receiving frame, and a locking hook at the tip. Insert tool 6,
A locking piece 8 having a lockable lower insertion hole 7 and provided integrally with the locking member 5, and a lid 1 formed to be insertable for locking the tool 6 into the insertion hole 7. And a receiving rack 12 having an intermediate insertion hole 11 into which the tool 6 can be inserted, which is provided at a position where the locking piece 8 pulled up by the tool 6 can be received. , Can be incorporated into a space 10 provided between the upper insertion hole 9 and the receiving shelf 12, is locked by a lock seat 13 provided on the receiving shelf 12, and the intermediate insertion hole 11 is substantially in a locked state. A locking device for an underground structure, which comprises a locking body 14 which is closed and can be attached and detached. 3. The locking body 14 has a key lid 15 for closing a key hole for unlocking it, and the key lid 15 and the locking body 14 are combined by a tightening tool 16 so as to be opened and closed. Item 2. A locking device for an underground structure according to item 2. 4. The lock seat 13 is a lock piece 17 of the locking body 14.
The locking device for an underground structure according to claim 2, wherein the locking device has a lock portion 18 provided on the receiving shelf 12 so as to project from the receiving rack 12 to the space 10.