CN2151176Y - Threaded cover for preventing steal - Google Patents

Abstract

The utility model relates to a rotary anti-theft device for manhole covers, which comprises an anti-theft frame which can be fixedly connected to a manhole frame and is provided with a slide positioning hole, and an anti-theft rod of which the upper end is fixedly connected with the lower side of the manhole cover, the rod segment can be moved in the slide positioning hole of the anti-theft frame up and down or horizontally, and a stopping block which can not pass through the slide positioning hole is fixed to the lower end of the anti-theft rod. The rotary anti-theft device for manhole covers can prevent the manhole cover from being stolen, but does not influence opening the manhole cover when the manhole cover needs to be opened. The rotary anti-theft device for manhole covers has simple structure, convenient installation, firm connection and ulterior installing position. The rotary anti-theft device for manhole covers is used and can avoid generating human casualty accidents caused by that the manhole cover is stolen.

Description

Threaded cover for preventing steal

The utility model relates to a kind of manhole cover anti-theft device, particularly a kind of rotary manhole cover anti-theft device.

Usually do not have linkage between existing inspection shaft lid and the Seat for manhole cover, in case the inspection shaft lid is stolen, the inspection shaft mouth will be directly exposed on the ground, and is very dangerous, even human casualty accident can take place.Also the someone has proposed a kind of manhole cover anti-theft device of chain type, and it is that two ends by a chain are connected in respectively on inspection shaft lid and the inspection shaft frame and form.But its link is also insecure, only needs a hammer blow can make it cracked, does not still reach antitheft purpose.

The purpose of this utility model provides a kind of rotary manhole cover anti-theft device, can prevent from that inspection shaft lid is stolen but not hinder to open the inspection shaft lid when needing by this device.This apparatus structure is simple, and is easy for installation, be connected firmly, and the installation site is hidden.

The purpose of this utility model realizes in the following manner, a kind of rotary manhole cover anti-theft device, comprise the antitheft frame that can be fixedly connected on the inspection shaft frame inside edge, a slip locating hole is arranged on it, a upper end is fixedly connected on that the slip locating hole that inspection shaft lid soffit, bar section be positioned at antitheft frame also can up and down or move horizontally, the anti-theft bar greater than the scotch of slip locating hole is being fixed in the lower end.Wherein, the slip locating hole on the described antitheft frame can be to form opening from the centre to the edge extension that is connected with the inspection shaft frame and at this edge.

Another kind of structure of the present utility model is, comprise one with inspection shaft frame cast solid, have the antitheft frame of a slip locating hole, a upper end to be fixedly connected on that the slip locating hole that inspection shaft lid soffit, bar section be positioned at antitheft frame also can up and down or move horizontally, the anti-theft bar greater than the scotch of slip locating hole is being fixed in the lower end on it.

The utility model has the advantages that, can prevent that by this device the inspection shaft lid is stolen but the inspection shaft lid is opened in not overslaugh when needed.This apparatus structure is simple, and is easy for installation, be connected firmly, and the installation site is hidden.Use this device, can not expose, thereby prevent contingent human casualty accident because of inspection shaft covers the stolen inspection shaft mouth that makes.

Below in conjunction with accompanying drawing embodiment of the present utility model is done detailed explanation.

Fig. 1 is the sectional view of the utility model one embodiment;

Fig. 2 is the sectional view along " A-A " line among Fig. 1.

Referring to Fig. 1 and Fig. 2, this is first embodiment of the present utility model, and inspection shaft frame 2 is installed on the inspection shaft mouth (not shown), and usually, the upper surface of inspection shaft frame 2 is concordant with the road surface.Inspection shaft lid 1 is placed on the inspection shaft frame 2, is covered with the inspection shaft mouth.Antitheft frame 3 is fixedly mounted on the inside edge of inspection shaft frame 2 by the bolt 5 of being furnished with nut, for making mounted bolt 5 non-dismountable, can knock bolt 5, makes the screw thread distortion on it.As can be seen from Fig. 2, a slip locating hole 6 is arranged on the antitheft frame 3, it extends from the centre to the edge that is connected with inspection shaft frame 2, and forms opening on this edge.In order to prevent antitheft frame 3 distortion, its both sides can have reinforcing rib 7 respectively.The upper end of anti-theft bar 4 is fixedly connected on the soffit of inspection shaft lid 1, a scotch 8 is being fixed in its lower end non-dismountablely, scotch 8 is greater than slip locating hole 6, thereby can not be by slip locating hole 6, and the intermediate pole segments of anti-theft bar 4 can move up and down or transverse horizontal moves 6 li of slip locating holes.

The anti-theft device of this form of structure can be installed on the inspection shaft lid and inspection shaft frame that generally uses now, and the upper end with anti-theft bar 4 is fixedly mounted on the soffit of inspection shaft lid 1 earlier, and non-removable scotch 8 is being fixed in the lower end of anti-theft bar 4.

Antitheft frame 3 is fixed on the inside edge of inspection shaft frame 2 by the bolt 5 of being furnished with nut then by the intermediate pole segments of the opening insertion anti-theft bar 4 of the slip locating hole 6 on it.Knock bolt 5 again, make the screw thread distortion on it.In addition, also will spread cement or pitch in inspection shaft frame 2 outsides, the part that makes bolt 5 be arranged in inspection shaft frame 2 outsides is embedded in cement or pitch, bolt 5 is become be difficult to dismounting or non-dismountable.

In the above-described embodiments, the slip locating hole 6 on the antitheft frame 3 also can seal, and promptly is provided with the opening (not shown) in its edge that is connected with inspection shaft frame 2.During installation, earlier antitheft frame 3 is fixedly mounted on the inside edge of inspection shaft frame 2 by said method.The upper end that the anti-theft bar 4 of scotch 8 will be installed again is fixedly mounted on the soffit of inspection shaft lid 1, makes the lower end of anti-theft bar 4 be inserted through slip locating hole 6 on the antitheft frame 3 then, at last scotch 8 is fixed on non-dismountablely the lower end of anti-theft bar 4.Non-removable fixing means wherein can adopt methods such as electric welding.That described here is second embodiment of the present utility model, on the inspection shaft lid and inspection shaft frame that it also can be used for generally using now.

The 3rd embodiment of the present utility model is, when making the inspection shaft frame, just with antitheft frame and inspection shaft frame 2 cast solid (not shown), and the basic structure of antitheft frame is identical with antitheft frame 3 among second embodiment, and the mounting method of anti-theft bar 4 is also identical with the method described among second embodiment.

In above-mentioned three embodiment, the length of anti-theft bar 4 intermediate pole segments all should guarantee upwards to mention inspection shaft and cover 1 o'clock, inspection shaft lid 1 under soffit can exceed the upper surface that inspection shaft frame 2 is gone up most.

The using method of above-mentioned three embodiment all is identical, and the promptly upwards flat inspection shaft lid 1 of mentioning is that angle of pivot rotation is put down again with anti-theft bar 4 then, inspection shaft lid 1 position that just is in shown in chain-dotted line among Fig. 1, thus open the inspection shaft mouth.The structure of this device can make inspection shaft lid 1 not be reversed, like this, anti-theft device always be in inspection shaft lid 1 below, it is very difficult therefore will dismantling.

Identical label is represented identical structure and parts in institute's drawings attached.

Claims (3)

1, a kind of rotary manhole cover anti-theft device, be connected between inspection shaft lid and the inspection shaft frame, it is characterized in that, comprise that one can be fixedly connected on the inspection shaft frame inside edge, the antitheft frame that one slip locating hole is arranged on it, a upper end are fixedly connected on that the slip locating hole that inspection shaft lid soffit, bar section be positioned at antitheft frame also can up and down or move horizontally, the anti-theft bar greater than the scotch of slip locating hole is being fixed in the lower end.

2, rotation manhole cover anti-theft device according to claim 1 is characterized in that, the slip locating hole on the described antitheft frame forms opening from the centre to the edge extension that is connected with the inspection shaft frame and at this edge.

3, a kind of rotary manhole cover anti-theft device, be connected between inspection shaft lid and the inspection shaft frame, it is characterized in that, comprise one with inspection shaft frame cast solid, have the antitheft frame of a slip locating hole, a upper end to be fixedly connected on that the slip locating hole that inspection shaft lid soffit, bar section be positioned at antitheft frame also can up and down or move horizontally, the anti-theft bar greater than the scotch of slip locating hole is being fixed in the lower end on it.

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