CN2136273Y

CN2136273Y - Theftproof manhole cover

Info

Publication number: CN2136273Y
Application number: CN 92233519
Authority: CN
Inventors: 李新田
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-21
Filing date: 1992-09-21
Publication date: 1993-06-16
Anticipated expiration: 2002-09-21

Abstract

The utility model relates to a theft-proof well cover, comprising a well cover, a well ring and a locking device which comprises a lock body, a lock sheet and a lock rod. The lock body, the lock sheet and the lock rod are moved in a linkage mode to cause the lock rod to insert into the lock hole on the well ring. The theft-proof well cover can be opened by a special opening tool. The theft-proof well cover has the advantages of good theft-proof performance, simple structure, etc.

Description

Theftproof manhole cover

The utility model relates to a kind of covering for sewer manhole device with anti-theft feature.

Existing covering for sewer manhole does not generally have anti-theft device, and well lid is often lost like this, not only causes economic loss, but also entail dangers to the safety of pedestrians and vehicles.Because the surface requirements of well lid is smooth, so be not easy with common lock it to be pinned, in addition, because the requirement of construction, well lid should be opened by the constructor easily, and it is comparatively favourable therefore using general opener.Existing well lid all can not satisfy above-mentioned requirements.

The purpose of this utility model provides a kind of have anti-theft feature, simple in structure, the covering for sewer manhole device that uses special-purpose opener to open easily.

Anti-stealing manhole cover device of the present utility model comprises well lid, walling crib and locking device.The well lid center has hole, a garden, and top, hole, garden is a boss.Two holes can be arranged, so that locking bar passes on the reinforcing rib at well lid back.The shape at walling crib edge can make well lid embed just, has two lockholes on the sidewall in walling crib.Locking device comprises: lock body, locking plate and locking bar, lock body is inserted in the hole, garden at well lid center, its cross section, top is polygon or odd-shaped cross section, the middle part is the garden cylindricality, the bottom has screw thread, the garden ring of a protrusion is arranged between the top of lock body and middle part, and it makes lock body embed just in the boss at well lid center; There is a hole at the locking plate center, and lock body inserts in this hole, bottom nut check.Cross sectional shape at the corresponding position of locking plate lock body is consistent with the center hole shape of locking plate, so that can not rotate between lock body and the locking plate; Have the hole, plural garden of symmetry around the locking plate, locking bar inserts in these holes, garden, passes the hole on the well lid reinforcing rib, inserts in the lockhole on the walling crib sidewall, and locking bar is by locking plate and lock body interlock.

The length of locking bar makes that when lock body was in primary importance, locking bar inserted lockhole just, and when lock body turned over an angle and is in the second place, locking bar was positioned at outside the lockhole.In order to strengthen antitheft effect, near center, the well lid back side, plural groove is set, the projection of equal number is set on corresponding position on the locking plate, spring washer is set below locking plate, when lock body is in primary importance, projection on the locking plate overlaps with the groove location at well lid back, and then this projection embeds this groove under the pressure of spring washer.Like this, opener that need not be special-purpose just is difficult to well lid is opened.

Adopt the manhole lid device of the utility model structure have theftproof performance good, simple in structure, open advantage easily, have certain popularization value.

Introduce embodiment of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is the sectional view of anti-stealing manhole cover;

Fig. 2 is the schematic diagram of locking device;

Fig. 3 is the sectional view of lock body;

Fig. 4 is the schematic diagram of locking plate.

Referring to Fig. 1 and Fig. 2, well lid 1 is placed in the walling crib 2, and walling crib 2 can be arranged on road or the ground, and lock body 3 passes the centre bore of well lid, and lock body top is polygon, and is for example square, and its top and well lid upper surface are in same plane behind the lock body 3 insertion centre bores; Have the garden ring 10(of a protrusion to see Fig. 3 on the lock body 3), screw thread 16 is arranged at the bottom, in order to fixing locking plate 4.Between locking plate 4 and clamp nut 12, a spring washer 5 can be arranged.Locking plate 4 can be garden shape (see figure 4) or other shape, the hole 13 at locking plate 4 centers can be square, rectangle, half garden shape or polygon, lock body 3 is consistent with the shape in hole 13 in the cross section at 15 places, position that locking plate 4 is installed, and has hole, plural garden 11 and two on the locking plate 4 with upper process 14.Locking bar 6 is enclosed within the hole 11, and available screw is fastening, and locking bar 6 passes the hole 9 on the reinforcing rib 8, inserts in the lockhole 7.

Fluted 17 near central hole at well lid 1 back side, the number of groove 17 equates that with the number of locking plate 4 upper process 14 when locking bar 6 insertion lockholes, the position of groove 17 overlaps with the position of projection 14, in the projection 14 embedding grooves 17.The used opener of the utility model is a kind of box spanner, and its interior loop-shaped is identical with the shaped upper part of lock body 3, and it is enclosed within the just rotatable lock body 3 in top of lock body 3.Because the distance between the top of lock body 3 and the edge of well lid centre bore upper boss designs lessly, can just hold opener and insert, then be difficult to well lid is opened with common wrench.The top cross sectional shape of lock body 3 can be square, pentagon, hexagon, heptagon or octagon, also can be designed to other shape supporting with opener, and for example quincunx or gear shape etc. can make anti-theft feature stronger like this.

Well lid and walling crib can once be cast with cast iron materials and be formed.Locking bar 6 and locking plate 4 should select for use harder material to make.The utility model can be used for the well head of sink hole or other urban construction facility.

Claims

1, a kind of anti-stealing manhole cover device, comprise well lid 1, walling crib 2, it is characterized in that: this manhole lid device also comprises a locking device, this locking device comprises lock body 3, locking plate 4 and locking bar 6, lock body 3 is inserted in the hole, garden at well lid center, and locking plate 4 is fixed on the lock body 3, and locking bar 6 is by locking plate 4 and lock body 3 interlocks, when lock body 3 is in primary importance, locking bar 6 inserts in the lockhole 7 on the walling crib sidewalls, and when lock body turned over an angle and is in the second place, locking bar was positioned at outside the lockhole.

2, manhole lid device as claimed in claim 1 is characterized in that: a boss is arranged at the top of well lid centre bore, and the garden ring 10 of a protrusion is arranged on the lock body 3, and it just in time can embed in the boss, and lock body 3 tops and well lid upper surface are in the same plane.

3, manhole lid device as claimed in claim 2 is characterized in that: locking plate 4 is positioned on the lock body 3, and the shape in the hole 13 of lock body 3 on the locational cross sectional shape that locking plate 4 is installed and locking plate 4 is consistent.

4, as the manhole lid device of claim 1-3, it is characterized in that: between the nut 12 of fastening locking plate 4 and locking plate 4, a spring washer 5 is arranged, plural groove 17 is set near the centre bore of the well lid back side, locking plate 4 is provided with the projection 14 of similar number, when lock body was in first kind of position, this projection 14 embedded in the groove 17.

5, manhole lid device as claimed in claim 4 is characterized in that: have two holes 9 on the reinforcing rib 8 at well lid 1 back, locking bar 6 passes from hole 9.

6, manhole lid device as claimed in claim 5 is characterized in that, cross section, lock body 3 top is identical with the interior cross section of special opening spanner, this cross section, lock body 3 top is one of following shape: (1) quadrangle, (2) pentagon, (3) hexagon, (4) quincunx, (5) gear shape.