CN2286203Y

CN2286203Y - Lock of cover for manhole

Info

Publication number: CN2286203Y
Application number: CN 96227837
Authority: CN
Inventors: 张岱荣; 宋绍忠
Original assignee: TAISHAN MACHINERY FACTORY TAIAN CITY
Current assignee: TAISHAN MACHINERY FACTORY TAIAN CITY
Priority date: 1996-05-14
Filing date: 1996-05-14
Publication date: 1998-07-15
Anticipated expiration: 2006-05-14

Abstract

The utility model provides the technical proposal of a lock of a cover for a manhole used for preventing the road manhole cover from being stolen. The scheme is characterized in that a cylindrical shaped lock body is provided, and the inner cavity is provided with a lock core which can be rotated around a shaft. A locking hole of an internal spline is processed at the shaft center of the top end of the lock core, and a guide shaft arranged below the locking hole is connected with a bolt plate. A bolt is arranged on the bolt plate, and is inserted in a bolt hole of the lock core. A lock rod is arranged at the side wall of the lock core, an adjusting rod is arranged on the lock rod, and the bottom of the adjusting rod is fixed with a locking block.

Description

Lock of cover for manhole

The utility model relates to theftproof lock, especially a kind of Lock of cover for manhole that prevents that manhole is stolen.

In recent years, because the stolen phenomenon of all kinds of well lids is serious on the road, cause the injury accident of a lot of vehicles and the person, stolen for preventing manhole, people have proposed much to prevent that manhole is stolen and install the scheme of anti-theft lock device additional, and the patent No. wherein open by Patent Office of the People's Republic of China and that grant patent is that No. 94225087.7 patents are exactly a kind of feasible technical scheme.In this scheme, to process two preformed holes on the well lid, one is used for stirring lock tube and well lid is thrown off or connecting walling crib driving, insert when locking well lid shift fork, and another preformed hole is to be used to adorn the locking screw rod, and is with it that lock tube is fastening in the time of on pattern manhole cover lock.This scheme relatively simple for structure, but exist confidentiality, reliability is relatively poor and be difficult for the dustproof problem.

The purpose of this utility model is exactly at existing weak point in the prior art, and a kind of strong security is provided, and service-strong prevents the Lock of cover for manhole technical scheme that manhole is stolen.

For clearly demonstrating the technical measures of this programme,, and, technical characterstic of the present utility model is described in detail in conjunction with its accompanying drawing now by a specific embodiment.

Accompanying drawing 1 is the half section structural representation of the utility model embodiment.

As can be seen from Figure, this Lock of cover for manhole has a top that the tubular lock body 12 of outer, plane is arranged, its inner chamber is equipped with one can be around the lock cylinder 13 of rotational, the lockhole 5 that has internal spline in this place, axle center, lock core 13 top processing, guide shaft 6 coaxial and that can move along axis is housed in the bottom of lockhole 5, this guide shaft 6 is passed down through lock body 12 bottom surfaces and connects a bolt plate 9, at least one dead bolt that cap is arranged 8 fixedly is housed on bolt plate 9, and present embodiment fixedly is equipped with three dead bolts 8 on bolt plate 9.Described dead bolt 8 passes the bottom surface of lock body 12 and upwards inserts in the dead bolt hole 7 that cooperates with it on the lock core 13, under its cap on the dead bolt 8 and between lock body 12 inner bottom surfaces spring 11 is being housed again, can stably be inserted in the dead bolt hole 7 in order to remain on the preceding dead bolt 8 of unblanking.At the middle part of described lock core 13 lateral walls one locking bar 3 is housed, these locking bar 3 levels are passed the sidewall opening of lock body 12 and are stretched out, again in its end by the adjusting rod 2 that is threaded, the fixedly connected lock dog 1 in the bottom of adjusting rod 2.And the opening of described lock body 12 sidewalls is one can allow the opening of locking bar 3 around lock core 13 rotational an angle of 90 degrees.Other is under the outer, described lock body 12 plane, and an outer cover 10 that has with lock body 12 sidewall opening respective side wall openings also is housed.Be in addition a lockhole blanking cover 4 also is housed on the described lockhole 5, prevent that lockhole from exposing to increase its confidentiality.

This Lock of cover for manhole is mounted in the well lid back side, is stuck in lock dog and pins well lid on the walling crib.Used key is that the male splined shaft that matches with the lockhole internal spline is arranged, and the protruding axle that matches with guide shaft is arranged under splined shaft.Key inserts lockhole and presses down when unblanking, make guide shaft move down the drive dead bolt and move down, dead bolt promptly breaks away from dead bolt hole, and this moment, lock core can be free around rotational, lock core rotates and promptly drives locking bar and lock dog rotation, make lock dog leave walling crib, well lid just can be opened, and when well lid is locked, dead bolt is to insert dead bolt hole, lock core can not rotate, and lock dog is clamped on the walling crib, so well lid can't be opened.Opening and locking of this structure lock is all reliable, in addition, outer cover is arranged outside lock body, and the lockhole blanking cover is arranged on lockhole, makes lockset that stronger dust tightness and confidentiality be arranged.This shows that the utility model compared with prior art its effect is conspicuous.

Embodiment illustrates in technical scheme, no longer repeats at this.

Claims

1, a kind of Lock of cover for manhole, mainly be by lock body [12], lock core [13], dead bolt [8] and lockhole [5] constitute, it is characterized in that described lock body [12] is the tubular that there is the outer, plane on a top, its inner chamber is equipped with one can be around the lock cylinder [13] of rotational, the lockhole [5] that has internal spline in the processing of place, this lock core [13] axle center, top, guide shaft [6] coaxial and that can move along axis is housed in the bottom of lockhole [5], this guide shaft [6] is passed down through lock body [12] bottom surface and connects a bolt plate [9], in bolt plate [9] at least one dead bolt that cap is arranged [8] is housed fixedly upward, this dead bolt [8] is upward through the bottom surface of lock body [12] and inserts in the dead bolt hole [7] that cooperates with it on the lock core [13], and goes up under its cap and between lock body [12] inner bottom surface spring 11 is housed at dead bolt [8]; A locking bar [3] is equipped with at middle part at described lock core [13] lateral wall, and the sidewall opening that this locking bar [3] passes lock body [12] stretches out, and in its end by the adjusting rod [2] that is threaded, regulating the fixedly connected lock dog in bottom [1] of [2]; The opening of described lock body [12] sidewall is one can allow the opening of locking bar [3] around lock core [13] rotational an angle of 90 degrees.

2. Lock of cover for manhole according to claim 1 is characterized in that also being equipped with under described lock body [12] plane, outer an outer cover [10] that has with lock body [12] sidewall opening respective side wall opening.

3. Lock of cover for manhole according to claim 1 is characterized in that also being equipped with on the described lockhole [5] a lockhole blanking cover [4].