CN2782769Y

CN2782769Y - Built-in double safety theft-proof lock for manhole cover

Info

Publication number: CN2782769Y
Application number: CN 200520018110
Authority: CN
Inventors: 陈志林
Original assignee: Individual
Current assignee: Xinjiang Gifted Communication Engineering Co Ltd
Priority date: 2005-05-08
Filing date: 2005-05-08
Publication date: 2006-05-24
Anticipated expiration: 2015-05-08

Abstract

The utility model relates to a built-in double safety theft-proof lock for a manhole cover, and belongs to the field of fixed constructions. A columnar rotary shaft is arranged on the inner bottom surface of a hollow cuboid lock box. A round turntable is fixedly sheathed on the shaft. Two arc connecting rods are movably connected with the position of the turntable in a diameter direction, and the position of the turntable is near the outer edge of the turntable. The outer ends of the arc connecting rods are respectively and movably linked with a sliver connecting rod via a connection pin. The connecting rods penetrate through the short sides of the lock box, and the outer ends of the connecting rods are orderly and movably connected with an intermediate connecting rod and a columnar clamping pin. A lock hole is arranged on a manhole cover ring corresponding to the outer end of the clamping pin. A locating plate is movably sheathed on the rotary shaft above the turntable linked with the inner bottom surface of the lock box. A locating groove is arranged on the locating plate and the upper part of the connection pin penetrates out of the locating groove. A lock box cover is movably sheathed on the rotary shaft above the locating plate. The lock box, the lock box cover and the inner wall of the manhole cover are orderly connected via screws. The rotary shaft is exposed outside the lock box cover against the circle centre of the manhole cover. The section of the outer end of the shaft is a triangle body. The manhole cover is provided with a circle centre hole with internal threads. A protection screw with external threads is arranged on the circle centre hole, and the centre of a screw rod is provided with a square hole. The utility model makes the manhole cover locked safely and fixedly and guard against theft effectively.

Description

The built-in double safety manhole antitheft lock

1, technical field: built-in double safety manhole antitheft lock of the present utility model belongs to the fixed buildings field, relates in particular to a kind of lockset.

2, background technology: the big and medium-sized cities well lid is frequently stolen, and inspection shaft becomes " road killer ", and the tragedy of murdering of hurting sb.'s feelings is of common occurrence.The steel fibre well lid of no recovery value has solved the pilferage problem, but at the easily icing piece of north inwall in severe winter, opens difficulty; The plastics well lid is owing to light weight, and large-tonnage vehicle pressure is out-of-date to pick up it easily, also has frangible defective in addition.All these anti-stealing manhole covers must be replaced existing metal well lid, cause the waste of resource.

3, summary of the invention: the purpose of this utility model is to propose a kind ofly to be installed in existing metal well lid inwall, but the effective antitheft built-in double safety manhole antitheft lock of safety locking.

The purpose of this utility model is achieved in that in a cavity cuboid lock box inner bottom surface central vertical and is equiped with cylindrical movable rotation-shaft, fixed cover is equipped with round turntable on this axle, adorn two curved rods in the active company in the nearly outer rim of disk diameter direction place, its outer end respectively by connecting pin with one rectangular connecting rod is active is connected, connecting rod passes the lock box minor face, its outer end successively with intermediate connecting rod, bayonet lock is active is connected, with the well cover cycle of corresponding position, bayonet lock outer end on have lockhole.The active rectangle location-plate that is set with in the rotating shaft above the rotating disk, its with lock box in the bottom surface be connected.Have locating slot on the location-plate, the top of aforementioned connecting pin passes this groove.The active lock box cover that is slightly larger than lock box that is set with in the rotating shaft of location-plate top, lock box, lock box cover, well lid inwall connect by screw.Rotating shaft exposure lock box cover, over against the well lid center of circle, axle outer end section is a triangle.The well lid circle centre position has heart hole, tapped garden, on be with externally threaded protection screw, its screw rod center has square hole.

Use the square key of manufacturing specially to insert and to screw out the protection screw from heart hole, well lid garden from the screw rod square hole, use the triangle body cavity key of manufacturing specially, go into rotating shaft outer end triangle body from well lid garden heart borehole jack, get final product the positive and negative rotation of turn rotating disk, thereby interlock curved rod, rectangular connecting rod and the overhanging or interior receipts of intermediate connecting rod stretch into bayonet lock or withdraw from the well cover cycle lockhole.Owing to adopt the technical scheme of above-mentioned dual fail-safe, but just make that existing metal well lid safety locking is effectively antitheft.

4, description of drawings: concrete structure of the present utility model is provided by following drawing and description

Fig. 1 is built-in double safety manhole antitheft lock and well lid inwall annexation schematic diagram

Fig. 2 is a well lid outer wall schematic top plan view

Fig. 3 is a protection screw structural schematic diagram

Fig. 4 is a protection screw plan structure schematic diagram

Fig. 5 is a lock box plan structure schematic diagram

Fig. 6 is rotating shaft, rotating disk and connecting rod annexation schematic diagram

5, the specific embodiment:

Legend: 1, well lid 2, intermediate connecting rod 3, bayonet lock frame 4, bayonet lock 5, rotating shaft 6, lock box 7, screw 8, rectangular connecting rod 9, lock box cover 10, protection stake 11, heart hole, garden 12, triangle body 13, protection screw 14, pad 15, square hole 16, gathering sill 17, connecting pin 18, location-plate 19, rotating disk 20, curved rod

Embodiment: shown in Fig. 1-6, the built-in double safety manhole antitheft lock is made up of lockhole three parts of opening on protection screw 13 that is installed in lock body on well lid 1 inwall, well lid circle center hole 11 places and the well cover cycle.Bottom center in a cavity cuboid lock box 6 vertical installing one cylindrical movable rotation-shaft 5, on this axle near fixing suit one round turntable 19 in box bottom, adorn two curved rods 20 in the active company in the nearly outer rim of the diametric(al) of this rotating disk 19 place, its outer end is respectively by connecting pin 17 and rectangular 8 active connections of connecting rod, two rectangular connecting rods 8 pass two minor faces of lock box 6 respectively, its outer end respectively by intermediate connecting rod 2 with one with cylindric 4 active connections of bayonet lock.On well lid 1 inwall, connect the pin frame 3 that is installed, bayonet lock 4 passed freely through bayonet lock frame 3, with the well cover cycle of corresponding position, bayonet lock 4 outer end on have lockhole.Active suit rectangle location-plate 18 in the rotating shaft above the rotating disk 19 5, its two ends are stuck on the two minor face inside walls of lock box 6.The nearly 4 jiaos of places of location-plate 18 are connected by screw 7 and lock box 6 interior bottom surfaces.Have locating slot 16 on the location-plate 18, the top of aforementioned connecting pin 17 passes this groove, the active lock box cover 9 that is slightly larger than lock box 6 that is set with in the rotating shaft 5 of location-plate 18 tops.Screw 7 is worn chain lid 9 from 4 jiaos of places of the bottom surface of lock box 6 outer wall, pierce in the reinforcing rib on well lid 1 inwall.Rotating shaft 5 exposure lock box covers 9, over against the well lid 1 inwall center of circle, axle outer end section is a triangle body 12.Have heart hole, garden 11 on the well lid 1, have internal thread on its hole wall, on be with externally threaded protection screw 13, its screw rod center has square hole 15.Be equiped with the protection stake 10 of protection lock body on well lid 1 inwall around lock box 6, it is higher than the lock box outer bottom.

Locking is during well lid 1, uses the square key manufactured specially to insert from the square hole 15 that protects screw 13 and can be from heart hole, well lid garden 11 screws out these screws; Use the triangle body cavity key of manufacturing specially, be inserted in rotating shaft 5 outer end triangle bodies 12 from heart hole, the garden of well lid 1 11, can rotate by turn rotating disk 19 clockwise directions, thereby interlock curved rod 20, intermediate connecting rod 2, rectangular connecting rod 8 make bayonet lock 4 stretch into the well cover cycle lockhole, and well lid 1 is engaged with well cover cycle, unless stealer digs out well cover cycle, together steal with well lid 1, otherwise well lid 1 can't take off; When opening well lid 1, the rotating disk of turn counterclockwise 19 gets final product.Protection stake 10 effects are to open well lid 1 in well during operation, and the protection lock box does not directly contact to earth and avoids breaking.

Claims

1, a kind of built-in double safety manhole antitheft lock, it is characterized in that: be equiped with movable rotation-shaft in a cavity cuboid lock box inner bottom surface central vertical, fixed cover is equipped with round turntable on this axle, adorn two curved rods in the active company in the nearly outer rim of disk diameter direction place, its outer end respectively by connecting pin with one rectangular connecting rod is active is connected, connecting rod passes the lock box minor face, its outer end successively with intermediate connecting rod, the active connection of bayonet lock, the active location-plate that is set with in the rotating shaft above the rotating disk, its two ends are stuck on the two minor face inside walls of lock box, are connected with bottom surface in the lock box, have locating slot on the location-plate, the top of connecting pin passes this groove, the active lock box cover that is slightly larger than lock box, the lock box of being set with in the rotating shaft of location-plate top, lock box cover, the well lid inwall connects successively by screw, rotating shaft exposure lock box cover, over against the well lid center of circle, axle outer end section is a triangle, has heart hole, garden on the well lid, has internal thread on its hole wall, on be with externally threaded protection screw, its screw rod center has square hole.

2, built-in double safety manhole antitheft lock as claimed in claim 1 is characterized in that: connect on the well lid inwall bayonet lock frame is housed, bayonet lock passes the bayonet lock frame.

3, built-in double safety manhole antitheft lock as claimed in claim 1 is characterized in that: be equiped with the protection stake of protection lock body on the well lid inwall around lock box, it is higher than the lock box outer bottom.