CN2181532Y

CN2181532Y - Self-locking theftproof manhole cover

Info

Publication number: CN2181532Y
Application number: CN 93235945
Authority: CN
Inventors: 傅东仁; 刘文哲; 刘尚银
Original assignee: 傅东仁
Priority date: 1993-12-25
Filing date: 1993-12-25
Publication date: 1994-11-02
Anticipated expiration: 2003-12-25

Abstract

The utility model discloses a self-locking theftproof manhole cover which is the improvement of the prior art. The self-locking theftproof manhole cover is characterized in that a lock tongue is an eccentric structure for a lock axle; the self-locking theftproof manhole cover is provided with a lock shell which is fixed on the lower side of a manhole cover by bolts corresponding to a locking hole; the middle part of the lock axle is provided with a boss; the lock axle passes through an axle hole form the bottom of the lock shell, is vertically connected with an eccentric lock tongue by a tenon, and is fixed by nuts; a spacing reset spring and spacing screws are arranged in the lock shell; the head of the lock tongue is in a lower oblique plane; a pipe plug is arranged on the locking hole, which is matched with a sealing ring and sealing pad to seal the lock shell. The utility model has the advantages of self locking upper cover, high safety, and high yield; the self-locking theftproof manhole cover is convenient to match with various inspection manhole covers to produce; the self-locking theftproof manhole cover has dustproof, waterproof, and antirust functions.

Description

Self-locking theftproof manhole cover

The utility model relates to a kind of manhole cover, particularly a kind of have to close cover self-locking and to the anti-stealing manhole cover of lock body antirust function.

China Patent No. be 92225253.X's " multifunctional burglary-resistant well lid ", well lid can be locked at 360 ° of any places of well seat, just can open and lock with providing key for oneself.It has anti-theft feature, and is easy to use, but weak point is that close behind the lid can not self-locking, and lock body and well lid are cast as one, and can not prevent scale, gives to produce and use brings many inconvenience.

Task of the present utility model provide a kind of have to close cover self-locking, anti-scale is produced and use anti-stealing manhole cover assembly easily all.

Task of the present utility model is finished as follows, it includes the well seat, well lid, lock shaft, dead bolt, in any side of well lid a lockhole is arranged, lock shaft and lockhole are concentric, dead bolt is an eccentric structure for lock shaft, also has corresponding lockhole lock housing with bolt below well lid, there is boss at the lock shaft middle part, lock shaft passed in the axis hole of lock housing bottom by vertical connection of square hole on tenon and the eccentric dead bolt, and fix with nut, hang with spring on link on the boss outer rim and the link on the lock-shell lining, block stop screw on the boss by block on the lock-shell lining, the head of dead bolt has lower inclined plane, and plug is housed on the lockhole.In order to cooperate plug that lock body is better sealed, on the upper limb face of lock housing, be provided with seal groove, be furnished with sealing ring in the seal groove, be with sealing mat on the lock shaft between lock housing axis hole and the dead bolt.

The utlity model has following effect: it utilizes the lower inclined plane of eccentric dead bolt and dead bolt to cooperate spacing back-moving spring, has to close to cover self-locking, and is easy to use, the safety factor height; Adopt the assembly structure form, be convenient to form a complete production network with various manhole covers, the yield rate height is convenient to promote; Under sealing system protection, water and steam can not enter in the lock housing, have dustproof, waterproof, rust inhibition, increase service life.

Describe embodiment in detail below with reference to accompanying drawing.

Fig. 1 is the cross-sectional view of the utility model self-locking antitheft well lid.

Fig. 2 is the lock body structure vertical view of the utility model self-locking antitheft well lid.

The utility model has following embodiment, it includes well seat 1, well lid 2, lock shaft 4, dead bolt 11, lockhole of any side at well lid 2, lock shaft 4 and lockhole are concentric, dead bolt 11 is eccentric structures for lock shaft 4, the lock housing 8 that also has a corresponding lockhole below well lid 2, to fix with three bolts 6, lock shaft 4 passed in the axis hole of lock housing 8 bottoms with vertical connection of square hole on square tenon and the eccentric dead bolt 11, and it is fixing with nut 10, there is a circle boss at lock shaft 4 middle parts, hang with spring 5 on link 13 on the boss outer rim and the link 14 on the lock-shell lining, there is block to block stop screw 12 on the boss on the lock-shell lining, make spring 5 be in the extension spring state, the head of dead bolt 11 is lower inclined plane, and plug 3 is housed on the lockhole.In order to cooperate 3 pairs of lock bodies of plug better to seal, on the upper limb face of lock housing 8, be provided with seal groove 7, be furnished with sealing ring in the seal groove 7, be with sealing mat 9 on the lock shaft between lock housing axis hole and the dead bolt.

Well seat of the present utility model, well lid can be processed assembling respectively with lock body, also can lock to existing various manhole cover transformations.During use, as long as well lid 2 is covered on well seat 1, the lower inclined plane of dead bolt 11 is run into well seat boss inwall, will under the effect on inclined-plane, dead bolt 11 be passed to the core direction, because dead bolt 11 is that off-centre is installed on the lock housing 8 for lock shaft 4, so moving, dead bolt 11 drives lock shaft 4 rotations, the pulling force that lock shaft 4 overcomes spring 5 drives dead bolt 11 rotations, the dead bolt head is moved in the well lid to the well lid direction, well lid 2 falls, when well lid fell well seat boss, dead bolt 11 automatically reset under the tension of spring 5, and at this moment dead bolt just sticks under the boss of well seat well lid, the well seat locks together.In the time of must opening well lid 2, need only and take out plug, and will be applicable to the extraordinary instrument (key) of lock shaft nose shape, twist lock shaft, lock shaft overcomes the pulling force of spring 5 when rotating, and drives dead bolt 11 and rotates the boss that makes it to withdraw from the well seat 1, gets final product to carry and opens well lid.During manhole cover, plug 3 is installed, cover well lid, dead bolt just can carry out self-locking and sealing as previously mentioned.

Claims

1, a kind of self-locking antitheft well lid, include the well seat, well lid, lock shaft, dead bolt, in any side of well lid a lockhole is arranged, lock shaft and lockhole are concentric, it is characterized in that: dead bolt is an eccentric structure for lock shaft, also has corresponding lockhole lock housing by bolt below well lid, there is boss at the lock shaft middle part, lock shaft passed in the axis hole of lock housing bottom by vertical connection of square hole on tenon and the eccentric dead bolt, and fix with nut, hang with spring on link on the boss outer rim and the link on the lock-shell lining, there is block to block stop screw on the boss on the lock-shell lining, the head of dead bolt is lower inclined plane, and plug is housed on the lockhole.

2, self-locking antitheft well lid according to claim 1 is characterized in that: cooperate plug that having on the lock housing upper limb face of lock body sealing established seal groove, be furnished with sealing ring in the seal groove, be with sealing mat on the lock shaft between lock housing axis hole and the dead bolt.