CN2252827Y

CN2252827Y - Anti-theft manhole cover and its open tool

Info

Publication number: CN2252827Y
Application number: CN 96231698
Authority: CN
Inventors: 虞思源
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-18
Filing date: 1996-04-18
Publication date: 1997-04-23
Anticipated expiration: 2006-04-18

Abstract

The utility model relates to an anti-theft manhole cover and thereof open tool, belonging to the safety anti-theft cover of the manhole of an underground pipe network. The utility model is composed of the manhole cover and thereof open tool, and the center of the manhole cover is provided with a blind hole having four smooth walls. The open tool of the manhole cover is composed of a draw rod which is provided with a screw hole and is provided with a lower end in a horn loudspeaker shape, a threaded rod which is screwed in the screw hole of the draw rod, a connecting rod which is sheathed on the draw rod through a middle hole, and two external apostrophe claw rods hinged at both ends of the connecting rod. The manhole cover is provided with no prying point, and has the anti-theft function. The open tool of the manhole cover has the advantages of simple structure, light weight and general material. The size and material are the same as the existing manhole cover, and the anti-theft manhole cover and thereof open tool can conveniently replace the existing manhole cover without increasing cost. The utility model has the advantages of convenient manufacture and carryover, and operational safety.

Description

The anti-stealing manhole cover and the instrument of uncapping thereof

The utility model relates to a kind of anti-stealing manhole cover and the instrument of uncapping thereof, and belongs to the safe antitheft lid of network of underground inspection shaft.

It is very serious that the lid of the set inspection shaft of existing Buried Pipeline Network Systems all is not that pilferproof closure Lost loses stolen phenomenon, not only cause economic loss, even more serious is to cause pedestrian, vehicle etc. to fall into inspection shaft car crash accident, brings great harm to the people's lives and property.

The purpose of this utility model is to avoid the problems referred to above of prior art and provide a kind of and can prevent general that steal, the anti-stealing manhole cover that the network of underground maintenance mans can conveniently open and the instrument of uncapping thereof.

The purpose of this utility model reaches by following technical measures.

Inspection shaft lid of the present utility model is central to be provided with the smooth rectangle blind hole of a wall, has cancelled the through hole of the existing different shape that is easy to pry open, and only is provided with the inspection shaft lid of the smooth rectangle blind hole of wall as has special tool to be difficult to unlatching in central authorities.The manhole cover opening instrument has screw and the pull bar lower end flare by one, and the claw bar of be screwed into screw rod in the pull bar screw, casting aside outside mesopore is enclosed within hinged two in connecting rod on the pull bar and connecting rod two ends is formed.

The turn screw rod rises pull bar, and tubaeform inclined-plane, pull bar lower end forces claw bar to rotate and compress the blind pore wall of inspection shaft lid around the two ends of connecting rod pin joint to both sides, catches the inspection shaft lid and mentions.

The utility model compared with prior art has following advantage:

1, appearance and size of the present utility model and used institute material are identical, can replace easily and do not increase cost.

2, the utility model does not have the origin of force of prying open and has tangible anti-theft feature, anti-stealing manhole cover and special opening tool construction thereof be simple, in light weight, general with material, make easy to carry, low price, use is reliable.

The explanation of accompanying drawing drawing:

Fig. 1 is a structural representation of the present utility model.

Following the utility model will describe in detail embodiment (in conjunction with the accompanying drawings).

Anti-stealing manhole cover of the present utility model 4 central authorities shown in Figure 1 are provided with the smooth rectangle blind hole 7 of a wall, inspection shaft lid opener 8 by one have screw 9 and the pull bar 1 lower end flare, be screwed into the screw rod 6 of pull bar 1 screw 9, the claw bar (2 and 3) that is enclosed within the hinged outer left-falling stroke in connecting rod 5 on the pull bar 1 and connecting rod 5 two ends through mesopore 10 forms.

Use when implementing, inspection shaft lid 4 lies on the network of underground inspection shaft, the central blind hole that its smooth flat and wall thereof are smooth does not have the open place and can't pry open, the claw bar (2 and 3) of the instrument of uncapping 8 lower ends is placed the blind hole 7 of inspection shaft lid 4, screw rod 6 is tightened, pull bar 1 with tubaeform inclined-plane is risen, and pull bar 1 inclined-plane forces claw bar (2 and 3) to rotate and compress blind hole 7 walls of inspection shaft lid 4 to both sides around two pin joints of connecting rod 5, catches inspection shaft lid 4 and mentions.

Claims

1, a kind of anti-stealing manhole cover and the instrument of uncapping thereof, it is characterized in that inspection shaft lid [4] central authorities are provided with the smooth rectangle blind hole [7] of a wall, manhole cover opening instrument [8] is made up of the claw bar [2 and 3] that has screw [9] and the pull bar lower end flare [1], is screwed into a screw rod [6] in pull bar [1] screw [9], is enclosed within the hinged outer left-falling stroke in connecting rod [5] on the pull bar [1] and connecting rod [5] two ends through mesopore [10].