CN2197390Y - Manhole cover against thief - Google Patents
Manhole cover against thief Download PDFInfo
- Publication number
- CN2197390Y CN2197390Y CN 94214953 CN94214953U CN2197390Y CN 2197390 Y CN2197390 Y CN 2197390Y CN 94214953 CN94214953 CN 94214953 CN 94214953 U CN94214953 U CN 94214953U CN 2197390 Y CN2197390 Y CN 2197390Y
- Authority
- CN
- China
- Prior art keywords
- key
- bar
- vent
- cover plate
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model relates to a theft protective manhole cover which comprises a cover plate with air vents, and a manhole ring. An annular convex edge is arranged on the side wall of the inner circle of the manhole ring. A fixed clamping lock and a livelock are arranged on both sides of one air vent on the bottom of the cover plate nearby the diametrical line of the connecting line of the two air vents. When the manhole cover is locked, bolts of the two locks are clamped at the bottom surface of the convex edge. The livelock is composed of a bolt rod, a supporting guide seat, a sliding rod and a sliding rod guide seat. The theft protective manhole cover is also provided with a key which is matched with the livelock on the cover plate. The key is composed of a key rod, a grab handle and a key head which is a transverse rod vertical to the key rod. The appearance of theft protective manhole cover is the same as that of an ordinary manhole cover, and the utility model is firm and durable.
Description
The utility model relates to a kind of anti-stealing manhole cover.
Present widely used well lid generally is made up of walling crib and cover plate, and cover plate is provided with air-vent.This well lid does not have anti-theft device, and is very easily stolen, and stolen phenomenon is very serious in the middle of actual the use.
The purpose of this utility model provides a kind of outward appearance and common well lid is as good as, and has anti-theft device and anti-theft feature, the anti-stealing manhole cover that uses the special opening instrument just can open.
The technical solution of the utility model is: this anti-stealing manhole cover, comprise cover plate, the walling crib of being with air-vent, and it is characterized in that on the interior round sidewall of walling crib a convex annular edge being arranged, the side of convex edge is parallel with the inside wall of walling crib, and the bottom surface of convex edge is parallel with the walling crib bottom surface.Air-vent both sides on the close diameter line of two air-vent lines on the cover plate bottom surface are provided with fixedly kayser and livelock, and the dead bolts of two locks all are stuck in the bottom surface of convex edge during locking, and fixedly kayser and cover plate are solidly fixed.Livelock by the dead bolt bar, be enclosed within on the dead bolt bar and the supporting guide holder that is solidly fixed with the cover plate bottom surface, the slide bar that is solidly fixed with dead bolt bar afterbody, be enclosed within spring on the slide bar, be positioned at the slide bar tail end and constitute with sliding bar guide holder that the cover plate bottom surface is solidly fixed, be provided with the unlatching platform on the dead bolt bar, the inclined-plane of livelock dead bolt down.During locking, fixedly kayser is stuck in the bottom surface on walling crib convex annular edge earlier, cover plate relies on deadweight or extraneous pressure to sink, the power that acts on the dead bolt inclined-plane forces the dead bolt bar to move to the cover plate center position, spring pressurized on the slide bar, when sinking down into the bottom surface, convex edge with cover plate above the lock tongue, spring relies on its tension force to promote dead bolt bar and gets back to original position, make the livelock dead bolt also be stuck in convex annular, thereby realize the locking function along on the bottom surface.This anti-stealing manhole cover also have with cover plate on the key that is used of livelock, key is made of key bar, key bit, one end of key bar is provided with vertical with it lever, the other end diameter of key bar is slightly less than ear shape air-vent center circle footpath, its end is fixed with key bit, and key bit is a cross bar vertical with key bar.For key bit is inserted in the air-vent, each of key bit and key bar joint horizontal projection to size all less than the air-vent corresponding size, in order to make key bar can promote the livelock dead bolt, is to open countertop apart from cover plate end face vertical distance at key bar apart from key bit top bus distance, and its diameter is greater than the air-vent center bore.Insert in the air-vent when the end of key like this, rotate lever, masterpiece could be used to open platform, the end of key bit joins with the unlatching face of opening platform during unlatching, key bit rotates with key bar, and promotion activity dead bolt moves to the cover plate center, when dead bolt withdraws from the boss bottom surface fully, upwards carry cover plate then, can open well lid.For making anti-theft effect better, the latter half of opening the unlatching face of platform is designed to the inclined-plane, like this except using private key, can not be with any other instrument from external opening.
Open platform and be positioned at ear shape air-vent by the cover plate center of circle one side, its unlatching face is concordant with the ear shape air-vent edge that joins.
This well lid is made by ductile iron.
Advantage of the present utility model and effect are: profile is the same with common well lid, is difficult for stolenly, has only that to use the special opening instrument be that key just can be opened, and sturdy and durable.
Fig. 1 is the well lid bottom view.
Fig. 2 is a well lid master sectional view.
Fig. 3,4,5,6 for the master of movable dead bolt parts, bow, face upward, rear elevation.
Fig. 7 is the Key structure schematic diagram.
As Fig. 1, Fig. 2, this well lid is made up of cover plate 1, walling crib 2, the fixedly kayser 4 of cover plate bottom surface, livelock, and two ear shape air-vents 5 are arranged on the cover plate 1.Livelock by and the supporting guide holder 8 that is connected of cover plate 1 bottom surface, be placed in wherein dead bolt bar 9, and the affixed slide bar 6 in dead bolt bar 9 ends, be placed on the slide bar 6 and and the guide holder 10 that is connected of cover plate 1 bottom surface and be placed on the slide bar 6 spring 7 between dead bolt bar 9 and guide holder 10 and form.Be positioned at air-vent 5 on the dead bolt bar 9 and be provided with a unlatching platform 11 near air-vent 5 edges by cover plate 1 center of circle one side.
As Fig. 7, the key of this well lid is made up of key bar 14, the lever 13 of key bar one end, key bit 16, and the projecting figure size of key bit 16 and key bar 14 junctions is less than the size in ear shape hole 5.At key bar 14 apart from key bit top bus distance for opening platform 11 end faces apart from cover plate 1 end face vertical distance, the diameter of key bar 14 is greater than the center bore of air-vent 5 or adorn a lasso 15.
The bottom of opening face as the unlatching platform of Fig. 3,4,5,6 dead bolt bars 9 is an inclined-plane 12.When non-standard key or other instrument insert air-vent 5 and during the unlatching face of being contacted with 12, do not slipped by the inclined-plane owing to there is the position-limiting action of collar 15 in the standard key, and be difficult at will being opened.
Angle between the line between the fixedly kayser of this anti-stealing manhole cover and the axis line of livelock and the two air-vent centre bore hearts is not more than 30 °.
Claims (6)
1, a kind of anti-stealing manhole cover, comprise cover plate, the walling crib of being with air-vent, it is characterized in that: a convex annular edge is arranged on the interior round sidewall of walling crib, the side of convex edge is parallel with the walling crib inside wall, the bottom surface of convex edge is parallel with the walling crib bottom surface, and air-vent both sides on the close diameter line of two air-vent lines on the cover plate bottom surface are provided with fixedly kayser and livelock, the dead bolt of two locks all is stuck in the bottom surface of convex edge during locking, and fixedly kayser and cover plate are solidly fixed; Livelock by the dead bolt bar, be enclosed within on the dead bolt bar and the supporting guide holder that is solidly fixed with the cover plate bottom surface, the slide bar that is solidly fixed with dead bolt bar afterbody, be enclosed within spring on the slide bar, be positioned at the slide bar tail end and constitute with sliding bar guide holder that the cover plate bottom surface is solidly fixed, be provided with the unlatching platform on the dead bolt bar, its unlatching face is concordant with the air-vent edge that joins; This anti-stealing manhole cover also has the key that cooperates with livelock on the cover plate, key is made up of key bar, key bit, one end of key bar is provided with vertical with it lever, the other end diameter of key bar is slightly less than the center circle footpath of ear shape air-vent, its end is fixed with key bit, key bit is a cross bar vertical with key bar, the projecting figure size of key bit and key bar connection is less than the size in ear shape hole, is to open countertop apart from cover plate end face vertical distance at key bar apart from key bit top bus distance, and its diameter is greater than the air-vent center bore.
2, a kind of anti-stealing manhole cover as claimed in claim 1 is characterized in that on the described key bar apart from the distance of cross bar top bus being that the place of well lid thickness is provided with the collar of a diameter greater than ear shape air-vent center bore.
3, a kind of anti-stealing manhole cover as claimed in claim 1 is characterized in that described unlatching platform is positioned at ear shape air-vent by the cover plate center of circle one side, and its unlatching face is concordant with the ear shape air-vent edge that joins.
4, a kind of anti-stealing manhole cover as claimed in claim 1 is characterized in that it is an inclined-plane that described unlatching platform is opened the bottom of face.
5, a kind of anti-stealing manhole cover as claimed in claim 1 is characterized in that this well lid made by ductile iron.
6, a kind of anti-stealing manhole cover as claimed in claim 1 is characterized in that fixedly kayser and the axis line of livelock and the angle between the line between the two air-vent centre bore hearts are not more than 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214953 CN2197390Y (en) | 1994-06-06 | 1994-06-06 | Manhole cover against thief |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214953 CN2197390Y (en) | 1994-06-06 | 1994-06-06 | Manhole cover against thief |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2197390Y true CN2197390Y (en) | 1995-05-17 |
Family
ID=33831080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94214953 Expired - Fee Related CN2197390Y (en) | 1994-06-06 | 1994-06-06 | Manhole cover against thief |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2197390Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906849A (en) * | 2017-03-17 | 2017-06-30 | 重庆工业职业技术学院 | A kind of inspection well cover and specialized opener and its application method |
| CN107687184A (en) * | 2017-09-01 | 2018-02-13 | 盐城三山道路设施有限公司 | A kind of combined type ventilation well lid and its installation method |
-
1994
- 1994-06-06 CN CN 94214953 patent/CN2197390Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906849A (en) * | 2017-03-17 | 2017-06-30 | 重庆工业职业技术学院 | A kind of inspection well cover and specialized opener and its application method |
| CN106906849B (en) * | 2017-03-17 | 2022-11-18 | 重庆公共运输职业学院 | Inspection well cover with special opening tool and using method thereof |
| CN107687184A (en) * | 2017-09-01 | 2018-02-13 | 盐城三山道路设施有限公司 | A kind of combined type ventilation well lid and its installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |