CN2083616U

CN2083616U - Well lid theft-proof lock and special key

Info

Publication number: CN2083616U
Application number: CN 91200171
Authority: CN
Inventors: 李铁军; 李海生
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-01-02
Filing date: 1991-01-02
Publication date: 1991-08-28

Abstract

The utility model discloses a well cover anti-theft lock which solves the problems that the well cover is directly covered on a well ring in prior art, and the well cover is easily stolen; if the well cover is stolen, road surfaces have unsafe incipient faults. The well cover anti-theft lock is characterized in that an internal thread hole is processed on the well cover, a through hole is processed on the bottom edge of the well cover, and the bottom edge of the well cover is corresponding to the lower end of the internal thread hole of the well cover. The through hole is provided with a locking shaft which is sheathed with a locking spring, and a locking baffle plate is installed at the lower end of the locking spring. The lower side of the locking baffle plate is locked tightly by a nut. The well cover anti-theft lock has the advantages of simple structure and large locking force; the well cover anti-theft lock can lock the well cover tightly on a well ring, and can have anti-theft function; meanwhile, the well cover anti-theft lock can also ensure the safety of pedestrians and vehicles.

Description

Well lid theft-proof lock and special key

The utility model relates to a kind of manhole antitheft lock and its private key that is used for upper and lower well lid, gas valve well lid and post and telecommunications cable well lid.

Well lid of the prior art generally all is directly well lid to be covered on walling crib, therefore, is easy to stolenly, in case well lid is stolen, just exists hidden danger on the road surface, and pedestrian, vehicle are noted causing casualty accident less than just falling in the well easily.

The purpose of this utility model is to provide a kind of manhole antitheft lock and its private key, by manhole antitheft lock well lid is locked on the walling crib, to prevent that well lid is stolen and to guarantee pedestrian and vehicle safety.

The utility model is to realize like this, on the well lid that is installed on the walling crib, be processed with internal thread hole, the well lid base of corresponding well lid internal thread hole lower end is processed with through hole, in this through hole, lock shaft is installed, on lock shaft, be with locking spring and the locking baffle plate is installed in the locking spring lower end, lock with nut below the locking baffle plate.

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

Fig. 1 is an assembling schematic diagram of the present utility model;

Fig. 2 is the front view of locking baffle plate;

Fig. 3 is the vertical view of locking baffle plate;

Fig. 4 is the key front view of manhole antitheft lock;

Fig. 5 is the key left view of manhole antitheft lock.

As shown in Figure 1, the utility model has a walling crib 1, a well lid 3 is installed on the walling crib 1, be processed with the inner spiral hole of two symmetries (perhaps 3～4 evenly distribute) on the said well lid 3, all there is through hole and this through hole internal diameter inner spiral hole less than the upper end on the well lid base of the inner spiral hole lower end of corresponding well lid 3, form a step, lock shaft 4 is installed in this through hole, lock shaft 4 upper ends also are processed with a boss and the step by well lid base through hole positions; External screw thread is processed in lock shaft 4 lower ends, is with locking spring 5 and locking baffle plate 6 is installed in spring 5 lower ends on lock shaft 4; Said locking baffle plate 6 is as Fig. 2, shown in Figure 3, and this locking baffle plate 6 is welded by base plate 6-1 and riser 6-2, and said base plate 6-1 becomes cruciform shape with riser 6-2; Left end at base plate 6-1 also is processed with a through hole, to lock baffle plate 6 by this through hole is sleeved on the lock shaft 4, locking baffle plate 6 upper surfaces are by locking spring 5 location, and soffit also is equipped with a locking closure 2 with spring washer 7 and nut 8 lockings on the inner spiral hole of well lid 3.In order to cooperate the use of this manhole antitheft lock, hexahedron (or five sides, all directions etc.) is processed in the upper end of said lock shaft 4, also designed private key 9 in addition, said private key 9 is as Fig. 4, shown in Figure 5, one end of private key 9 is processed with the interior hexagonal hole that the hexahedron with lock shaft 4 upper ends is complementary, and the other end of key 9 is processed with a through hole.

During use, lock shaft 4 is installed in the hole, base of well lid 3, put locking spring 5 and locking baffle plate 6(locks the inboard of baffle plate 6 at lock shaft 4 at this moment), put spring washer 7 and used nut 8 lockings, then private key 9 is inserted lock shaft 4 upper ends, penetrating handle in private key 9 upper end through holes turns clockwise, can compress locking spring 5 and be pressed on the lock shaft 4 by lock shaft 4 downward turning efforts along with the compression of locking spring 5 makes locking baffle plate 6, key 9 again, can make the locking baffle plate arrive locked position, (at this moment, the base plate 6-1 of locking baffle plate 6 contacts with walling crib 1 base, the riser 6-2 of locking baffle plate 6 contacts with the side of walling crib), can reach the effect of locking well lid 3, last, loam cake 2 is installed again to play sealing process on well lid.

The utility model has the advantage of that simple in structure, coupling mechanism force is big, well lid tightly can be locked on the walling crib, can play antitheft effect, can guarantee the safety of pedestrians and vehicles again simultaneously; Adopt special-purpose (general) key, but convenient for maintaining.

Claims

1, a kind of special with lock, be particularly related to a kind of manhole antitheft lock, comprise walling crib (1), well lid (3), it is characterized in that, be processed with internal thread hole on well lid (3), the well lid base of corresponding well lid (3) internal thread hole lower end is processed with a through hole, and lock shaft (4) is installed in this through hole, on lock shaft (4), be set with locking baffle plate (6), spring washer (7) and the nut (8) that has locking effect be installed below locking baffle plate (6).

According to the said manhole antitheft lock of claim 1, it is characterized in that 2, said locking baffle plate (6) is welded into cruciform shape by base plate (6-1) and riser (6-2).

According to the said manhole antitheft lock of claim 1, it is characterized in that 3, hexahedron is processed in the upper end of said lock shaft (4).

4, the private key (9) that is used of the said manhole antitheft lock of a kind of and claim 3, it is characterized in that, one end of said private key (9) is processed with the interior hexagonal hole that the hexahedron with lock shaft (4) upper end is complementary, and the other end of private key (9) is processed with a through hole.