CN2395008Y - Anti-theft lock for manhole cover - Google Patents

Abstract

The utility model relates to an anti-theft lock for manhole covers, which is matched with a manhole cover to use. The utility model comprises a manhole cover, a manhole ring, a lock body and an unlocking key, wherein, the inner side of the manhole cover is provided with a close lock case, and anti-corrosion lubricant is filled in the lock case. The lock body is composed of a lock pin, a restoring spring and a fixing clip hook matched and connected with the manhole ring, and the restoring spring is sheathed on the main body of the lock pin. The restoring spring and the main body of the lock pin are assembled in the close lock case, and both ends of the lock pin are respectively bulged outside the lock case. The tail end of the lock pin is clamped and connected with the manhole ring, and the front end of the lock pin is matched and connected with an opening key. The lockset effectively solves the problems of the internal lubrication and the rust prevention of the lock body. Meanwhile, the utility model also prevents outside filth and dank moisture from penetrating into the lock body, improves the service life of the lockset, and reduces the failure rate.

Description

Manhole antitheft lock

The utility model relates to a kind of and goes into the matching used manhole antitheft lock of manhole cover.

Be used at present with to go into the kind of the matching used manhole antitheft lock of manhole cover a lot, such as go into the special-purpose lock of manhole cover with " the dial link-type " of the design of cam link mechanism principle.This locking mechanism is simple, and movement is anti-pollution, stainless property good, and switch is convenient, operation easily.But it is doted on greatly because of mechanism, is difficult for applying the protective cover protection, easily damages, damages phenomenons such as movement when moving well lid.And for example make anti-stealing manhole cover as substitute with the passenger car door lock, this lock structure exquisiteness, highly versatile, the transformation that is used for existing manhole well lid is flexible, low cost of manufacture, thus often by well lid manufacturer and user as first-selection.But the anti-dark and damp dirty erosiveness of this lockset is poor, and dirt sewage is often invaded lock core along the keyhole slit, very easily make the lock core corrosion, and unlatching is obstructed, and severe patient causes lockset to damage.

The purpose of this utility model be to provide a kind of simple in structure, open the manhole antitheft lock convenient, that the antipollution corrosion performance is strong.

The purpose of this utility model is achieved in that it comprises well lid, walling crib and lock body and opens key, the well lid inboard is provided with closed lock box, fill anticorrosion sliding agent in its lock box, described lock body constitutes by lock pin, return spring with fixedly grab that walling crib connects, return spring is set on the lock pin main body, its two be fitted in the closed lock box, the both ends of lock pin are protruding respectively outside lock box, its tail end and walling crib clamping, front end connects with the unlatching key.

Open key and be made up of the shank of the key, spoon bar and spoon head, the middle part of described spoon head is provided with the clamping mouth that matches with the lock pin front end.

Anticorrosion sliding agent can be butter.Lock box is provided with oil filler point, and lock box and well lid are one or divide body structure.The front end equipped one eccentric work cover of spoon bar.

The technological progress that the utility model is obtained is: lock body is assemblied in the lock box of sealing, fills anticorrosion sliding agent in its lock box, can solve lock body internal lubrication and antirust problem effectively, has prevented also that simultaneously extraneous dirt and dark and damp moisture from invading in the lock body.Return spring can keep lock pin to be in locking states automatically, has solved lockset effectively and has forgotten the problem of locking in use easily.

Be that embodiment further describes the utility model below with the accompanying drawing:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model key.

As shown in Figure 1, this theftproof lock comprises well lid 1, walling crib 2, closed lock box 3 and lock body and unlatching key, and described closed lock box 3 is located at the inboard of well lid 1, and the two is an one, and in order to reequip existing manhole well lid, the two also can be the branch body structure.Lock body is formed by lock pin 4, return spring 5 with the fixedly grab 6 of walling crib 2 clampings, and return spring 5 is set on the main body of lock pin 4, its two place in the closed lock box 3, in lock box 3, fill anticorrosion sliding agent butter or other grease thing.With the corrosion corrosion that prevents return spring 5 lock pin main bodys and the pollution of surrounding environment.For convenient, on a sidewall of lock box 3, be provided with an oil filler point 7 to dosing butter in the lock box 3.The both ends of described lock pin 4 protrude from respectively outside the lock box 3, its tail end and walling crib 1 clamping, front end connects with the unlatching key, described unlatching key as shown in Figure 2, it is made up of the shank of the key 8, spoon bar 9 and spoon 10, by spoon bar 9 spoon 10 and the shank of the key 8 are connected as one, spoon 10 is an inclined to one side flat rectangular shape, is provided with the clamping mouth 11 that matches with lock pin 4 front ends in the middle.Thereby change the fit dimension of clamping mouth 11 and lock pin 4 front ends and on spoon bar 9, install eccentric work cover 12 additional, can increase the kind of key exponentially, solution anti-stealing manhole cover key kind is few, the drawback of theftproof performance difference.

During use, key is inserted along the open hole on the well lid 1, after the buckling groove 11 of spoon 10 snaps in the front end of lock pin 4, stir spoon bar 9, lock pin 4 produces displacement, makes the tail end disengagement of lock pin 4 and the clamping of walling crib 2, carries after the end that opens well lid, throw off the clamping of the fixedly grab 6 be located on the lock pin 4 respective side well lids 2 and walling crib 2 again, promptly open well lid 1.

Claims (6)

1, a kind of manhole antitheft lock, it comprises well lid, walling crib and lock body and opens key, it is characterized in that the well lid inboard is provided with closed lock box, fill anticorrosion sliding agent in its lock box, described lock body constitutes by lock pin, return spring with fixedly grab that walling crib connects, and return spring is set on the lock pin main body, its the two be fitted in the closed lock box, the both ends of lock pin are protruding respectively outside lock box, its tail end and walling crib clamping, and front end connects with the unlatching key.

2, manhole antitheft lock according to claim 1 is characterized in that said unlatching key is made up of the shank of the key, spoon bar and spoon head, and the middle part of described spoon is provided with the clamping mouth that matches with the lock pin front end.

3, manhole antitheft lock according to claim 1 and 2 is characterized in that said anticorrosion sliding agent is a butter.

4, manhole antitheft lock according to claim 3 is characterized in that said lock box is provided with oil filler point.

5, manhole antitheft lock according to claim 4 is characterized in that said lock box and well lid are one or divide body structure.

6, manhole antitheft lock according to claim 5 is characterized in that the front end equipped one eccentric work of said spoon bar is overlapped.

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