JP3077935B2 - Locking device for lids at entrances and exits of common ditch etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a lid such as a work entrance provided on a road of a common groove for accommodating, for example, a communication cable, a power transmission cable, a water supply / sewage pipe and the like.

[0002]

2. Description of the Related Art In a conventional locking device for a lid of a common groove entrance provided on a road surface, a keyhole of a lock unit into which a key handle is inserted when unlocking from the ground is exposed on the road.

Therefore, when the keyhole is left for a long period of time, the keyhole is corroded and embrittled by exposure to wind and rain, or the keyhole is deformed because it is stepped on by an automobile or the like passing on the road. In such a case, a problem occurs such that the key handle cannot be inserted. Conventionally, in such a case, the lock cannot be unlocked without destroying a part of the locking device or the lid, and time and
They were forced to waste economic costs.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent a key handle from being unusable due to a key portion being exposed on a road surface, and to provide a joint groove or the like which can be unlocked reliably during use. An object of the present invention is to provide a door locking device.

[0005]

[MEANS FOR SOLVING THE PROBLEMS] According to the present invention, there is provided a joint groove or the like.
The locking device for the lid at the entrance penetrates the lid 1 in the up-down direction and is fixed.
Fixed cylindrical body 2 to be attached; vertically slidable and fixed
The upper part of the fixed cylinder 2 is rotatable about the cylinder axis of the cylinder 2.
Upper rotor 3 provided with a keyhole 13 on the upper surface;
A spring 12 for urging the rotor 3 upward; below the upper rotor 3
Having a passive concave portion 5 fitted to the driving convex portion 4 provided in the portion.
The fixed cylinder 2 is rotatable about the cylinder axis of the fixed cylinder 2.
A lower rotor 6 accommodated in a lower portion; a lower portion of the lower rotor 6
6a, and is integrally rotated with the lower rotor 6 to form a fixed wall.
And a latch body 7 which can be engaged with and disengaged from a receiving member 9 provided at 8;
A male screw that is screwed into the female screw part 10 provided on the upper inner peripheral surface of the body 2
Holding the upper rotor 3 so as to cover the upper rotor 3.
A screw plug 11 screwed into the upper part of the fixed cylinder 2;
Insert the tip key portion 17a into the key hole 13 of the rotor 3, and
Data 3 is pushed down to a predetermined depth against the bias of the spring 12.
After that, the key handle 1 for rotating the upper rotor 3 by a predetermined angle
7 and a non-rotating projection on the peripheral surface of the intermediate portion of the upper rotor 3.
A protrusion 16 is provided on the inner surface of the fixed cylindrical body 2.
A vertically long groove 18 is provided in the vertical direction in which
8 is provided with a circumferentially long transverse groove 19 at the lower end.
You.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
To explain, the lid locking device of the present invention uses
The ring plate 15 of the fixed cylinder 2 is fixed with bolts 14. The
An internal thread 10 is provided on the upper inner peripheral surface of the fixed cylinder 2 to lock
Sometimes the threaded plug 11 formed on the outer peripheral surface of the male threaded portion
Screw it into the female screw part 10. A detent 16 is provided on the outer periphery of the central portion of the upper rotor 3 , and is engaged with a vertical groove 18 provided on the inner periphery of the fixed cylindrical body 2. Therefore, the upper rotor 3 moves up and down without rotating.
A concave portion 22 is provided on the upper surface of the screw plug 11, and the screw plug can be attached to and detached from the fixed cylinder 2 using a predetermined tool that engages with the concave portion 22. When the screw stopper 11 is detached from the fixed cylinder 2, the upper rotor 3 urged upward by the spring 12 rises as shown in FIG. The keyhole 13 of the upper rotor 3 is exposed on the upper surface.

In this state, the tip key portion 17a of the key handle 17 is inserted into the key hole 13, and is pushed down together with the upper rotor 3. At this time, the driving convex portion 4 having a rectangular cross section provided at the lower portion of the upper rotor 3 descends in the rectangular-shaped passive concave portion 5 of the lower rotor 6. The driving convex portion 4 and the passive concave portion 5 are always engaged, albeit with different depths. The vertical groove 18 is shown in FIG.
As shown in FIG. 5, the lower end portion is associated with the circumferential transverse groove 19, and when the upper rotor 3 is pushed down to a predetermined depth by the key handle 17, the detent protrusion 16 causes the vertical groove 18 and the transverse groove 1 to move.
Reach the 9 meeting. The rotation of the key handle 17 causes the rotation preventing projection 16 to enter the lateral groove 19. By this rotation operation, the upper rotor 3 and the lower rotor 6 rotate integrally, and nuts 20 and 2 are attached to the lower portion 6a of the lower rotor 6.
The latch body 7 fastened and fixed by 1 also rotates.
When the latch body 7 rotates, the engagement between the receiving member 9 on the fixed wall 8 side and the latch body 7 is released, the lock is unlocked, and the lid 1 can be opened.

In the locking method, the unlocking process may be repeated in reverse. That is, the key handle 1 is inserted into the key hole 13 of the upper rotor 3.
7 is inserted and the key handle 17 is rotated in the reverse direction to rotate the upper rotor 3, the lower rotor 6, and the latch body 7 so that the receiving member 9 and the latch body 7 are engaged. 1 is locked to a fixed wall 8. In this state, the rotation preventing projection 16 of the upper rotor 3 is located at the junction of the horizontal groove 19 and the vertical groove 18. Therefore, if the force for pushing the key handle 17 is released, the upper rotor 3 is raised by the action of the spring 12. Thereafter, the screw stopper 11 is screwed into the female screw portion 10 of the fixed cylinder 2 using a predetermined tool. Also at this time, since the detent projection 16 is in the vertical groove 18, the upper rotor 3 descends without rotating.

A mounting ring plate 15 is provided at an intermediate portion of the fixed cylindrical body 2.
Are welded, and the ring plate 15 is fixed to the lid 1 by bolts 14 and nuts 23. The receiving member 9 is welded to an appropriate position on the side surface of the fixed wall 8. The fixed cylinder 2 includes a main body 2a and a cap 2b fitted and fixed to the lower end of the main body 2a.

[0010]

As described above, according to the present invention, since the lock unit, particularly the keyhole, can be protected by providing the screw stopper for concealing the upper rotor, the lock unit is weathered by the rain and the automobile. It is possible to maintain the expected function for a long time without being damaged or damaged. Further, if the screw stopper is damaged, it is sufficient to replace the screw stopper, so that there is no need to destroy or replace the lid or lock, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a lid and a fixed wall of a common groove entrance provided with a locking device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the locking device for a lid in a locked state.

FIG. 3 is a partial longitudinal sectional view of the locking device for a lid when a screw stopper is removed.

FIG. 4 is a longitudinal sectional view of the locking device for a lid, showing an unlocking operation using a key handle.

FIG. 5 is an exploded perspective view of an upper rotor and a lower rotor of the lid locking device.

FIG. 6 is a longitudinal sectional view of a fixed cylinder of the locking device for a lid.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

[Explanation of symbols]  DESCRIPTION OF SYMBOLS 1 Cover 2 Fixed cylinder 3 Upper rotor 4 Driving convex part 5 Passive concave part 6 Lower rotor 7 Latch body 8 Fixed wall 9 Receiver 10 Female screw part 11 Screw-in plug 12 Spring 13 Keyhole 14 Bolt 15 Mounting ring plate 16 Upper part Rotating stopper projection 17 Key handle 18 Vertical groove 19 Horizontal groove 20 Nut 21 Nut 22 Recess of screw-in plug 23 Nut

Claims (1)

(57) [Claims] A fixed cylindrical body fixedly penetrated to a lid in a vertical direction; an upper part of the fixed cylindrical body slidable in a vertical direction and rotatable about a cylindrical axis of the fixed cylindrical body; An upper rotor 3 provided with a keyhole 13 on the upper surface thereof; a spring 12 for urging the upper rotor 3 upward; and a passive concave portion 5 fitted to a driving convex portion 4 provided at a lower portion of the upper rotor 3. And a lower rotor 6 housed in the lower portion of the fixed cylinder 2 so as to be rotatable about the cylinder axis of the fixed cylinder 2; and a lower rotor 6 fixed to a lower portion 6 a of the lower rotor 6 and integrally rotated with the lower rotor 6. A latch member 7 which can be engaged with and disengaged from a receiving member 9 provided on a fixed wall 8; and a male screw portion which is screwed to a female screw portion 10 provided on an upper inner peripheral surface of the fixed cylindrical body 2 is provided on an outer peripheral surface thereof. A screw plug 11 screwed into the upper part of the fixed cylindrical body 2 so as to conceal the front end; 7a, the upper rotor 3 is pressed down to a predetermined depth against the bias of the spring 12, and then a key handle 17 for rotating the upper rotor 3 by a predetermined angle is formed around the intermediate part peripheral surface of the upper rotor 3. A stopper projection 16 is provided, a vertically long vertical groove 18 into which the rotation preventing projection 16 is inserted is provided on the inner surface of the fixed cylindrical body 2, and a circumferentially long transverse groove 19 is provided at a lower end portion of the vertical groove 18. Locking device for lids at entrances and exits of common grooves.