JP2001214648A - Clogging prevention type lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clogging prevention type lock device in which slurry and rainwater do not accumulate in a keyhole and soil and sand and dust can be cleaned and removed easily. SOLUTION: The first cleaning hole 12 is formed on the lower side of the keyhole 11 in a clutch body 10 to penetrate vertically, the second cleaning hole 23 is formed on the lower side of a passive hole 24 in a rotor 20 to penetrate it vertically, and the internal base 15 of a passive groove 14 is tilted towards the first cleaning hole 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device to be used outdoors. This lock device is used for sewage installation, water supply, gas, and electric line buried sections on road surfaces and for highway roads. Used to lock the grating lid of the drain.

[0002]

2. Description of the Related Art Conventionally, this type of lid is locked with a simple latch lock, but the latch mechanism may come off due to vibration and impact from a passing vehicle, and an unexpected accident may be caused by the lid being flipped off. It has occurred. There have been proposals to improve lock stability by incorporating a more complicated lock mechanism.However, earth and sand and dust enter the keyhole and cause clogging. Sometimes it becomes impossible to lock.

[0003]

Accordingly, an object of the present invention is to provide a sufficiently high lock stability,
An operational failure due to clogging is to provide an anti-clogging lock device in which inoperability does not occur.

[0004]

According to a first aspect of the present invention, there is provided a lock device for preventing clogging, in which a clutch body that can move in an axial direction and a rotor that cannot move in an axial direction are coaxially aligned in a housing. The upper surface clutch portion 13 of the clutch body 10, which is housed in
Of the front wall 1a of the rotor 20 so as to be relatively non-rotatable, and the drive shaft 28 at the lower end of the clutch body 10 is fitted into the passive hole 24 at the upper end of the rotor 20 so as to be relatively non-rotatable. A lock plate 21 is connected to a lower end portion 29, and a keyhole 1 into which a shaft 30 of a key handle 33 is inserted.
1 and a passive groove 14 into which a driving projection 31 on a side surface of a shaft 30 is inserted is provided at an upper end portion of the clutch body 10, and the clutch body 10 is pushed and turned by the key handle 33. First cleaning hole 12 communicating with 11
Is provided in the clutch body 10 in the up-down direction, the second cleaning hole 23 communicating with the passive hole 24 is provided in the rotor 20 in the up-down direction, and the inner bottom surface 15 of the passive groove 14 is in the first position.
The inclined surface is inclined downward toward the cleaning hole 12.

According to a second aspect of the present invention, in addition to the above configuration, the clutch body 10 is disposed inside the rotor 20 at the fitting portion between the clutch body 10 and the rotor 20 and is provided outside the passive hole 24. An accommodating groove 34 for the compression coil spring 22 is provided, and a tapered surface 25 whose diameter decreases from the upper side to the lower side is provided at the boundary between the passive hole 24 and the second cleaning hole 23 of the rotor 20.

This locking device is generally mounted on a manhole cover or a grating cover on the road surface with the longitudinal axis of the housing 1 arranged vertically. For this reason, fine soil and sand mixed with rainwater and dust from riding on the wind are
Although they inevitably enter the keyhole 11, they pass through the first cleaning hole 12 of the clutch body 10 and the second cleaning hole 23 of the rotor 20, which are formed in a straight line below the keyhole 11. Then, it is immediately discharged from the inside of the lock device. In addition, earth and sand and dust coming along the inner surface of the passive groove 14 of the clutch body 10 are guided to the first cleaning hole 12 by the inclination of the inner bottom surface 15. Similarly, earth and sand and dust coming along the inner surface of the passive hole 24 of the rotor 20 are removed from the tapered surface 2.
5 guides and eliminates the second cleaning hole 23. Keyhole 1
Even if earth and sand are clogged in the upper part of 1 and the passive ditches,
When the shaft 30 and the drive projection 31 of the key handle 33 are pushed in, they are forcibly pushed into the first cleaning hole 12 and pushed out from the second cleaning hole 23 of the rotor 20. Never.

In this lock device, the key handle 33 is in a locked state in which the lock plate 21 itself or a lock bolt connected to the lock plate 21 is engaged with the fixed frame.
And the upper surface clutch portion 13 of the clutch body 10 is engaged with the lower surface clutch portion 2 of the front wall portion 1a of the housing 1 by the bias of the spring 22. As a result, the rotor 20 in which the drive shaft 28 of the clutch body 10 is non-rotatably fitted in the passive hole 24 cannot rotate with respect to the housing 1, and the locked state is maintained stably. .

To release the lock when the lid is opened, the shaft 30 of the key handle 33 is inserted into the key hole 11 of the clutch body 10, the drive projection 31 is inserted into the passive groove 14, and the clutch body 10 is spring-loaded. Push down against the bias of 22. By this depression, the upper clutch portion 13 of the clutch body 10 is disengaged from the lower clutch portion 2 of the housing 1, so that the clutch body 10 can rotate with respect to the housing 1. , The rotor 20 also rotates with respect to the housing 1. As a result, the lock plate 21 is driven to the unlock position, and the lid is unlocked.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a flange is formed to project from an outer peripheral portion of an upper end of a housing 1, and a male screw 3 is engraved on an outer peripheral surface of a cylindrical portion of a housing main body. The nut 4 is screwed. The lower end surface of the cylindrical portion of the housing 1 is opened, and the inner peripheral groove 35 of the lower end portion is opened.
The C-ring 26 fitted in the lock member prevents the rotor 20 from escaping downward. The cross section of the drive shaft 28 of the clutch body 10 is hexagonal, and the passive hole 24 of the rotor 20 is formed as a hexagonal hole.

The spring 22 inserted between the clutch body 10 and the rotor 20 is a compression coil spring, and the clutch body 10 is urged so as to be constantly pressed against the lower surface of the front wall 1a of the housing 10. A lock plate 21 is non-rotatably fitted to the lower end square shaft portion of the rotor 20 and fixed by a nut 27. In the embodiment shown in FIG.
The cleaning hole 23 is formed to have a larger diameter than the first cleaning hole 12 of the clutch body 10 to enhance the effect of discharging earth and sand and dust.

[0011]

In the lock device of the present invention constructed as described above, since a lock mechanism using the spring 22 and the clutch body 10 is incorporated, a sufficiently high lock stability can be obtained, and the earth and sand and dust are reduced. Since it is easily drained by rainwater or the like, and the keyhole is not clogged, the key can be unlocked immediately by the key handle 33 when necessary, and the operability is excellent. Since sand and water do not stay in the keyhole and flow down or fall naturally, metal corrosion from the keyhole does not occur.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a lock device according to an embodiment of the present invention in a state where a key handle is removed.

FIG. 2 is a longitudinal sectional view of the lock device in an exploded state.

FIG. 3 is a plan view of a clutch used in the lock device.

FIG. 4 is a plan view of a rotor used in the lock device.

FIG. 5 is a longitudinal sectional view of a lock device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Clutch part 10 Clutch body 11 Keyhole 12 First cleaning hole 13 Clutch part 14 Passive groove 20 Rotor 21 Lock plate 22 Spring 23 Second cleaning hole 24 Passive hole 25 Tapered surface

Claims (2)

[Claims] An upper surface clutch of a clutch body, which is housed in a housing in a state in which a clutch body movable in an axial direction and a rotor which is not movable in an axial direction are coaxially aligned and pushed up by a spring. Portion 13 is engaged with the lower surface clutch portion 2 of the front wall portion 1a of the housing 1 so as not to rotate relatively, and the drive shaft 28 at the lower end portion of the clutch body 10 is connected to the rotor 20.
The lock plate 21 is connected to the lower end 29 of the rotor 20 by being fitted into the passive hole 24 at the upper end of the
A keyhole 11 into which the shaft 30 of the key handle 33 is inserted;
Passive groove 14 into which drive protrusion 31 on the side surface of shaft 30 is inserted
Is provided at the upper end of the clutch body 10 and the key handle 33
The first cleaning hole 12 communicating with the key hole 11 is provided in the clutch body 10 vertically through the first cleaning hole 12 communicating with the key hole 11, and the second cleaning hole communicating with the passive hole 24. 23 is provided in the rotor 20 through the vertical direction, and the inner bottom surface 15 of the passive groove 14 is formed as an inclined surface which is inclined downward toward the first cleaning hole 12. . 2. The clutch body 10 is arranged inside the rotor 20 at a fitting portion between the clutch body 10 and the rotor 20, and the rotor 20 has a receiving groove 34 for the compression coil spring 22 outside the passive hole 24. The taper surface 25 provided so that the diameter becomes smaller toward the lower side from the upper side is provided in the boundary part of the passive hole 24 and the 2nd cleaning hole 23 of the rotor 20 provided, The Claim 1 characterized by the above-mentioned. Locking device.