CN2227148Y

CN2227148Y - Anti-theft cover for sewer monhole

Info

Publication number: CN2227148Y
Application number: CN 95214976
Authority: CN
Inventors: 朱万麟; 朱涛
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-21
Filing date: 1995-06-21
Publication date: 1996-05-15
Anticipated expiration: 2005-06-21

Abstract

The utility model relates to an anti-theft cover for a sewer manhole, comprising a manhole mouth (1), a manhole cover (2), and a key (7). Two locking holes are symmetrically arranged on the manhole cover (2). A lock axle (3) is positioned in the locking holes. The lower part of the lock axle passes through the axle holes in the locking holes and is matched with a lock tongue (4). A split pin (5) is pierced in the hole of the lock axle, and the both ends are used for positioning the lock tongue (4). The lock axle (3) comprises a locking head (8), the cylindrical structure (9) of a spacing boss shape, and an axle (10). The locking head (8) is a triangular column, and one face of the triangular column is provided with a convex triangular column (11). The axle (10) is a column in a quadrangle or a rectangle or a triangle. The utility model has the advantages of novel and simple structural design, convenient installation, practicality, and good anti-theft effect.

Description

Following well anti-stealing manhole cover

The utility model subordinate well lid manufacturing field.

Background technology of the present utility model is: notification number: CN2099143U, title " antitheft manhole cover ", the feature of this well lid is with worker's type clamp, be fastened on a lateral edges of manhole cover by screw, to be fastened on the opposite side edge of manhole cover for the grooved carriage of locking bolt by screw, and aligning keyhole, when the needs locking, the one side that manhole cover is assembled with clamp is placed on earlier on the inspection walling crib, make it block the lower edge of walling crib, set level manhole cover then, well lid and walling crib are coincide, key is inserted keyhole and be enclosed within on the lock shaft, turn clockwise 60 ° and promptly finish locking, otherwise finish unlatching when being rotated counterclockwise 60 °.

Purpose of design of the present utility model is a kind of novel structure of design, simple, following well anti-stealing manhole cover that theftproof performance is good.

Design scheme of the present utility model: 1, design philosophy: 1. increase fast lock construction spare between well head and the well lid two macrostructure spares, after well lid and well head assemble, can't open well lid without key.2. improve the well head design, strengthen well head and combine firmly degree with ground, prevent that well head is loosening, in case well head and well lid are together stolen.2, design scheme: the symmetrical both direction at square, garden shape well lid increases lockhole, assembles lock shaft, dead bolt in the lockhole, rotating to an angle with private key to make the left alone without help position of staying locking, opening well lid of dead bolt.Its structural concept: a kind of well anti-stealing manhole cover down, it comprises well head (1), well lid (2) and key (7), well lid (2) is gone up symmetry and is shaped on two lockholes, lock shaft (3) is positioned at lockhole, the bottom of its lock shaft is passed the axis hole in the lockhole and is complementary with dead bolt (4), cottor pin (5) is through in the hole of lock shaft, and dead bolt (4) is located at its two ends.Lockhole is the groove shaped structure and an axis hole is arranged at the groove shaped bottom.Lock shaft (3) is made of tapered end (8), positive stop lug boss shape column structure (9) and axle (10), and tapered end (8) cylinder triangular in shape, its triangle cylinder simultaneously have a triangulo column (11) that protrudes, and axle (10) is square or rectangle or triangle cylinder.The L-shaped structure of dead bolt (4).Be shaped on half hole that is shaped on half hole and the lockhole bottom on the boss of lock shaft (3), and be equipped with pin within it and constitute built-in lock (6).Key (7) is by key operated head, connecting rod and handgrip constitute, key operated hole body triangular in shape, its triangle hole body simultaneously are shaped on recessed triangle hole body and are complementary with tapered end (8) in the lock shaft (3), and handgrip one end is the tip shape, the other end is screwdriver bit structure.The bottom of the outer ring of well head (1) be provided with protrusion step (12) and with well head be one.

3, operating principle: utilize the rotation of lock shaft dead bolt that well head and well lid are fastened knot together, reach antitheft purpose.

The utility model is compared with prior art: the one, compare with traditional casting iron well lid, theftproof performance is arranged, do not have private key can't open well lid, private key is that shape is difficult for copying, and one of built-in lock is arranged between lockhole and lock shaft, though know to design details person the key well lid of yet not opening is not arranged; The 2nd, parts such as new pattern manhole cover, well head, lock shaft, dead bolt, key are ironcasting, and simple and convenient processing method is easy to produce, and is easy to promote in each large, medium and small city; The 3rd, for the well head of losing well lid, can set up anti-theft device according to existing well head size preparation well lid.(because anti-theft device fits on the well lid)

Description of drawings:

Fig. 1 is the utility model fragmentary top TV structure schematic diagram

Fig. 2 is the utility model sectional structure schematic diagram

Fig. 3 is the Key structure schematic diagram

Fig. 4 is the lock shaft structural representation

1--4 does with narration the utility model in conjunction with the accompanying drawings.1, the design's periphery that well head (1) is imbedded under ground portion increase to protrude step (12), has increased the combine fastness of well head with the road surface greatly, is difficult to pry open.2, two lockholes have been increased symmetrical 2 of well lid (2), the lock shaft (3) of in lockhole, packing into from top to down, the lock shaft circular upper part and square lower part, topmost is triangle tapered end (8), assemble dead bolt (4) from the well lid bottom toward lock shaft, dead bolt will screw in the downside of well head lower limb when dead bolt forwarded certain angle to, and at this moment two symmetrical dead bolt ultimate ranges have just reached and will and cover the purpose that (2) are locked in well head greater than well head maximum gauge (or length of side) at this moment.3, rotation lock shaft (3) is finished by private key (7), and the lock shaft upper design is triangle tapered end (8), Yi Bian a little triangle boss (11) is wherein arranged, so design has three purposes.1. copy difficulty, private key is identical shaped concave structure, the spill key is inserted the convex tapered end open well lid, and rotation torque firmly all compares rationally; 2. the shape of tapered end with general spanner, pliers clamping incessantly.3. the little triangle boss of design on a limit has not only improved and has copied the difficulty of key, and can determine the direction of dead bolt with this limit.When this limit is parked in the well head edge,, when this limit is parked in the other direction, be locking for opening.4, in order further to improve the reliability of lockset, designed built-in lock (6), between lock shaft and lockhole slit, bored the hole of a φ 6MM, dark 20MM, a pin has been inserted pin-and-hole at the position that is slidingly matched of well lid lockhole and lock shaft.If do not pull out pinning in advance, also rotate motionless lock shaft even if insert key.When the staff need open well lid, must with instrument pin be extracted earlier, insert key rotation lock shaft then, well lid can be opened.5, when the selection of material, from practical, reliable, with low cost angle.Lock shaft, dead bolt are all selected ironcasting for use, and intensity is good corrosion-resistant.The dowel nail then selects for use the plastic skin electric wire of antirust river deer erosion flexible to make.

Claims

1, a kind of well anti-stealing manhole cover down, it comprises well head (1), well lid (2) and key (7), it is characterized in that: well lid (2) is gone up symmetry and is shaped on two lockholes, lock shaft (3) is positioned at lockhole, the bottom of its lock shaft is passed the axis hole in the lockhole and is complementary with dead bolt (4), cottor pin (5) is through in the hole of lock shaft, and dead bolt (4) is located at its two ends.

2, according to wanting the antitheft and lid of the described well down of claim 1, it is characterized in that: lockhole is the groove shaped structure and an axis hole is arranged at the groove shaped bottom.

3, well anti-stealing manhole cover down according to claim 1, it is characterized in that: lock shaft (3) is made of tapered end (8), positive stop lug boss shape column structure (9) and axle (10), tapered end (8) cylinder triangular in shape, its triangle cylinder simultaneously has a triangulo column (11) that protrudes, and axle (10) is square or rectangle or triangle cylinder.

4, well anti-stealing manhole cover down according to claim 1 is characterized in that: the L-shaped structure of dead bolt (4).

5, down well anti-stealing manhole cover according to claim 1 is characterized in that: be shaped on half hole that is shaped on half hole and the lockhole bottom on the boss of lock shaft (3), and be equipped with pin within it and constitute built-in lock (6).

6, well anti-stealing manhole cover down according to claim 1, it is characterized in that: key (7) is by key operated head, connecting rod and handgrip constitute, key operated hole body triangular in shape, its triangle hole body simultaneously is shaped on recessed triangle hole body and is complementary with tapered end (8) in the lock shaft (3), and handgrip one end is the tip shape, the other end is screwdriver bit structure.

7, down well anti-stealing manhole cover according to claim 1 is characterized in that: the bottom of the outer ring of well head (1) be provided with protrusion step (12) and with well head be one.