CN2190667Y

CN2190667Y - Anti-theft manhole cover and its opening tool

Info

Publication number: CN2190667Y
Application number: CN 94210129
Authority: CN
Inventors: 马万顺
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-28
Filing date: 1994-04-28
Publication date: 1995-03-01
Anticipated expiration: 2004-04-28

Abstract

The utility model discloses a novel anti-theft manhole cover and special opening tool. The novel anti-theft manhole cover is characterized in that the symmetrical position of the manhole cover is drilled with two holes for lock axles to insert; manhole cover bottoms on the drilled holes are provided with bosses; gaskets are all fixed on the bosses; the two lock axles are respectively inserted in the holes on the manhole cover, and the lower part of the manhole cover are orderly provided with a lock plate, a spring, gland nuts, and locking nuts; the lock plate and the lock axles synchronously rotate. The special opening tool is a handle. Claws are arranged on the handle. The claws are inserted in small holes arranged on the tops of the lock axles, which realizes the opening and the locking of the novel anti-theft manhole cover. The utility model has the advantages of reasonable structural design, practicality, and beauty.

Description

Anti-theft manhole cover and its opening tool

The utility model belongs to the manhole lid device on the various manholes, and what relate generally to is a kind of novel antitheft well cover and opener thereof.

In municipal construction, many manholes are left on ground.Owing to except that supporting, do not have any connected structure between its well lid of existing manhole and the well seat, do not need can open well lid by any instrument, so be easy to have things stolen, stolen phenomenon in fact also often takes place.Not only cause economic loss after stolen, bring danger and inconvenience for pedestrian, vehicle etc., also very easily pollute to manhole toward the contact meeting to country.Thus, present safety measure to manhole has proposed many improvement projects.As China Patent No.: 90212470.6 are called " road surface manhole safety lock ", it adopts screw thread locking bar, nut by the band cap, be fastened on clamp on the locking bar by nut and form locking device well lid, but because the screw thread locking bar of its band cap only needs common spanner to open when opening, so its anti-theft measure is relatively poor relatively.And the clamp that is used to lock is fastened on locking bar by upper and lower two nuts, and when between top nut and the well lid certain interval being arranged, safety lock does not have the locking effect, promptly need not any instrument is free-hand can open; When between top nut and the well lid during no gap, promptly there is certain frictional force to exist, when this frictional force is excessive, be difficult to open well lid with spanner, do not have antitheft effect yet.Have only when this frictional force during, could realize locking, and this frictional force is difficult to generally grasp just less than the frictional force between upper and lower two nuts and the clamp.When this locking device meets silt water and soil, not only open very conveniently, and also can influence the locking quality.

The purpose of this utility model promptly produces thus, proposes a kind of novel anti-stealing manhole cover and special-purpose opener thereof.

For achieving the above object, the utility model is achieved through the following technical solutions: it is made of well lid, well seat, lock shaft, packing ring, jam plate, spring, clamp nut, locking nut and special opening instrument, on the well lid symmetric position, be provided with the hole that lock shaft is penetrated, the well lid bottom of its hole portion position is a boss, packing ring is fixed on the boss of well lid bottom, in the two lock shafts hole that fill-in well covers respectively, its underpart all is disposed with jam plate, spring, clamp nut and locking nut, and jam plate and lock shaft rotate synchronously; The special opening instrument is a handle, and it is provided with pawl, and its pawl is corresponding identical with the hole that the lock shaft top is provided with.

The utility model reasonable in design, safe and reliable, it is smooth that well lid end face and road surface keep, and do not influence the supporting capacity of the attractive in appearance and well lid of municipal administration.Because locking device adopts packing ring and spring increasing the frictional force of jam plate, thereby has stopped to adopt other instrument or the free-hand possibility of opening well lid; Realize opening after the corresponding insertion in the hole that pawl is and the lock shaft top is provided with owing to the special opening instrument again, thereby unlatching is convenient, is not subjected to the influence of foreign material such as muddy water sand-lime, sleet faggot.

The utility model has following accompanying drawing:

Accompanying drawing 1 is the structural representation of the utility model locking device.

Accompanying drawing 2 is the front view of the utility model opener.

Accompanying drawing 3 is the vertical view of the utility model opener.

In conjunction with the accompanying drawings, it is as follows to provide embodiment of the present utility model:

As shown in Figure 1: the utility model is made of lock shaft 1, well lid 2, packing ring 3, jam plate 4, spring 5, clamp nut 6, locking nut 7, well seat 8, dedicated handle 9, on 180 ° of symmetric positions of well lid 2, be drilled with the hole that lock shaft 1 is inserted, well lid 2 bottoms of its hole portion position are boss, and effect is to be convenient to install locking device and to increase its intensity.Packing ring 3, two lock shafts 1 that all have been fixedly connected at the boss position insert respectively in the hole on the well lid 2, and its underpart all is disposed with jam plate 4, rubber spring 5, clamp nut 6, locking nut 7, and jam plate 4 rotates synchronously with lock shaft 1.Be drilled with three apertures at the top of lock shaft 1, the special opening instrument is one handle (shown in Fig. 2-3), and handle is provided with three pawls, and its pawl is corresponding identical with the aperture at lock shaft 1 top.When the utility model uses, the clamp nut 6 of elder generation regulating spring 5 bottoms to the frictional force of spring 5 produces, this frictional force be transferred to hand just changeed motionless till, can open with the special tool leicht fallen D/A this moment, with locking nut 7 lockings, the aperture half-twist that then pawl on the special tool is inserted the lock shaft top can be realized opening, locking after clamp nut 6 is adjusted to correct position.Locking device of the present utility model all share φ 700, φ 600 light, heavy well lids and manhole cover base commonly used at present.

Claims

1, a kind of manhole anti-stealing manhole cover and opener thereof, comprise well lid (2), well seat (8), it is characterized in that: be drilled with two holes that lock shaft (1) is inserted on its symmetric position of described well lid (2) respectively, well lid (2) bottom at its boring position is a boss, packing ring (3) all has been fixedly connected on its boss, two lock shafts (1) insert respectively in the hole on the well lid (2), its underpart is disposed with jam plate (4), spring (5), clamp nut (6) and locking nut (7), and jam plate (4) rotates synchronously with lock shaft (1); The special opening instrument is handle (9), which is provided with pawl (10), and its pawl 10 is corresponding identical with the aperture that lock shaft (1) top is drilled with.

2, anti-stealing manhole cover according to claim 1 is characterized in that: described spring (5) is a rubber spring.