CN2108125U

CN2108125U - Theftproof locking device for manhole cover

Info

Publication number: CN2108125U
Application number: CN 91231269
Authority: CN
Inventors: 吴卫军; 钱秀英
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-18
Filing date: 1991-12-18
Publication date: 1992-06-24

Abstract

The utility model discloses an anti-theft device for a well cover, which is used for various well covers. The anti-theft device for a well cover is composed of a shifting fork, a lock shaft, a well cover fixing device, a ball, a connecting rod, etc., wherein, the lock shaft and the shifting fork are connected into a whole which can be rotated, the connecting rod can be driven in the process of lifting a key to push the ball in the lock shaft, and then the ball is withdrawn out of a slot in a lock core. At this time, a hexagonal nut, the lock shaft and the shifting fork can be rotated, the shifting fork is no longer fastened with a well ring, and the well cover can be raised up. In a closed state, the well cover fixing device and the shifting fork are respectively fastened with the well ring, so the well cover can not be raised up.

Description

Theftproof locking device for manhole cover

The utility model relates to a kind of well cover antitheft device that is used for various well lids.

At present the well lid of the various wells on road does not all have very good anti-theft device, so well lid easily stolen by the people, causes various traffic accidents, and the pedestrian falls into the personal injury accident of down-hole etc.

The purpose of this utility model is to invent a kind of manhole antitheft lock device, improves the technological deficiency that existing various well lid does not have very good anti-theft device.

The utility model is to realize like this, below original well lid, increase the fastening devices that can fasten walling crib, increase a lock that has shift fork again at well lid, this shift fork also can fasten the bottom of walling crib and can rotate, utilize key to lift connecting rod, connecting rod promotes pellet shot from a slingshot again, rotates lock shaft and shift fork again, can open well lid like this.

Below in conjunction with accompanying drawing the utility model is done further narration.

Fig. 1 is a structural front view of the present utility model.

Fig. 2 is a structure vertical view of the present utility model.

Fig. 3 is the schematic diagram of the utility model when blocking.

Fig. 4 is the vertical view of well lid of the present utility model.

In Fig. 1, the hex nut on the lock shaft 1 is pushed down sealing mat 2, and lock shaft passes upper cover plate 3 and lower cover 8 and fixing with collar 9, makes lock shaft not have axial float.Jackscrew 5 is pressing spring 6 in lock shaft, and spring 6 withstands pellet shot from a slingshot 7 again.Jackscrew, spring and pellet shot from a slingshot have two covers.Two pellets shot from a slingshot head into when blocking in the groove of lock core 4, and shift fork 10 is enclosed within on the lock shaft, with key chain or jackscrew 13 shift fork are fixed on the lock shaft, use pad 12 again, and nut 11, bullet pad etc. are fixing up and down with shift fork.Key 17 is inserted (groove is arranged in the keyhole) down along the keyhole on well lid and the upper cover plate, key turns over 180 ° after by well lid and upper cover plate, key core 14 upper edges touch the bottom of two connecting rod 16 1 ends, respectively there is a little axle 15 at the middle part of two connecting rods, and connecting rod can rotate under the support of little axle.The other end of two connecting rods can touch two pellets shot from a slingshot 7.

In Fig. 2, screw 18 is fixing on the cover board with lock core, and the screw 19 on the cover plate is used for cover plate is fixed on well lid.Little axle is fixed on the lock housing on both sides.

In Fig. 3, when blocking, well lid 21 bottoms have the fastening devices 22 and the shift fork of the curved metal structure of a band to fasten walling crib 20 respectively.Well lid and lock whole 23 combine as a whole.

In Fig. 4, two on the well lid are given and boxing out, and on the hole 24 groove are arranged, and can insert key, and hex nut is entangled in another hole 25, and can put sleeve into and remove son.

When needs are opened lock and are lifted well lid, can insert key, after rotating 180 °, key is upwards lifted, and at this moment key core lifts connecting rod, and the groove of lock core released pellet shot from a slingshot by connecting rod, entangling hex nut with the sleeve spanner again rotates, lock shaft and shift fork also rotate together so, make shift fork no longer fasten the bottom of walling crib, just liftable well lid.Connecting rod is in the groove of lock core.Connecting rod can be provided with a plurality of.Change the center to center distance between a plurality of connecting rods, can prepare different keys and the lock of manufacturing different model.

After adopting the utility model, prevented losing of various well lids effectively, also guaranteed the safety of pedestrian and vehicular traffic, the opening and closing of well lid are flexible freely, be active in one's movements, antirust durable, and simple structure, cost is low.This device also can be used for other communal facility, as door lock of transformer etc.Have high economic benefit and social benefit.

Claims

1, a kind of anti-theft device that is used for various well lids, it is characterized in that this device is made of lock shaft, shift fork, connecting rod and the well lid that has a fastening devices, shift fork and lock shaft combine as a whole, when blocking, the fastening devices of shift fork and well lid fastens walling crib respectively, two pellets shot from a slingshot in the lock shaft head into respectively in the groove of lock core, well lid and lock integral body combine as a whole, respectively there is a little axle at the middle part of two connecting rods, little axle is fixed on the lock housing on both sides, connecting rod can rotate under the support of little axle, a pellet shot from a slingshot that also can touch in the groove of lock core in the lock shaft of connecting rod.

2, according to the described well cover antitheft device of claim 1, it is characterized in that shift fork being connected with lock shaft with key chain or jackscrew, the fastening devices of well lid is the curved metal hook of a band, two on the well lid are given and boxing out, on the hole groove is arranged, another borehole jack is lived the hex nut on the lock shaft, and connecting rod can be provided with a plurality of.