CN2242309Y

CN2242309Y - Theft-proof lock for man-hole cover of sewer

Info

Publication number: CN2242309Y
Application number: CN 95207236
Authority: CN
Inventors: 刘存友
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-28
Filing date: 1995-03-28
Publication date: 1996-12-11
Anticipated expiration: 2005-03-28

Abstract

The utility model relates to a lock for the manhole covers of the mine mouths of underground installations. A fixing lock and a moving lock are together used for locking a manhole cover on a manhole seat. The fixing lock and the moving lock are installed on the both ends of the same diametrical line at the bottom of the manhole cover. The fixing lock is fixed on the manhole cover by screws. The sleeve tube of the moving lock is inserted from the upper side of the manhole cover, and the convex face of the sleeve tube is fastened on the flange of the corresponding hole of the manhole cover. The bottom of the sleeve tube are orderly provided with a rubber pad and a locking head which is fastened and positioned by upper and lower two nuts and a spring pad. By the rotation of the locking head, the lock is locked or unlocked. The lock needs a special key to lock or unlock. The lock can be arranged on the manhole covers of the mine mouths of various underground installations for preventing optional open or thieves.

Description

The sewer manhole antitheft lock

The utility model relates to the lock of the near coal-mine well lid of a kind of city underground installation, specifically is a kind of sewer manhole antitheft lock.

Existing city underground installation is provided with the operation well head, is equipped with well lid.This well lid plays the protection well head, guarantees pedestrian's safe important function of walking; common well lid is placed on the wellhead receptacle usually; with between the wellhead receptacle without any connecting; thereby under artificial reason, often lose; the walking along the street safety that makes well head lose protection and jeopardize the pedestrian causes national wealth loss and casualty accident.For this reason, once there were many people to propose multiple anti-stealing manhole cover and theftproof lock, but all were to adopt the manufacturing of old-fashioned cylinder lock method, and like this under the sewer adverse circumstances, caused spring marble in the lock to get rusty or stops up, and gave and unblank and locking causes difficulty.

The purpose of this utility model is to provide a kind of corrosion that is difficult for, and is sturdy and durable, and can be locked in the sewer manhole antitheft lock on the well seat reliably, makes unrelated person can't open well lid, with the safety that guarantees and cover.

The utility model is to realize like this, theftproof lock comprises pin 17, movable lock 16 and key, pin 17 is installed in the edge of well lid 15 bottom surfaces, movable lock 16 comprises sleeve pipe 3 and tapered end 1, there is cylindrical convex surface sleeve pipe 3 upper ends, the convex surface middle part is shaped on cylinder shape groove, rubber plug 2 is housed in the groove, is shaped on screw thread on the sleeve pipe 3 outer garden cylinders, the lower end is shaped on locked groove 7, sleeve pipe 3 is equipped with tapered end 1 on a section below the well lid, tapered end 1 usefulness nut 5 and spring washer 6 are fastened on the appropriate location, and tapered end 1 is approximate rectangle, and its minor face is circular-arc, there is installing hole the centre, on the sleeve pipe between nut and the well lid 15 rubber pad 4 is housed.The frictional force of rubber pad produces the necessary moment of locking and unblank.

Key is a private key, locks and unblank all to need its key.Key axle 8 is the cylindrical of two sections different-diameters, and moving bar 9 is equipped with on top, and a side of bottom is carved with shallow slot, and interior dress reed 11, vertical also axis center with shallow slot are shaped on a groove, and interior dress tongue piece 12 has a slotted hole on the tongue piece.Reed 11 usefulness screws 10 are fixed on the axle 8, and tongue piece 12 is limited in the groove on the axle by pin 13, and tongue piece can slide on pin 13.When key inserts the Kong Zhonghou of sleeve pipe 3, hole wall compressing tongue piece, tongue piece overcome the elastic force of reed and retraction in axle, after key was inserted into the position, turning cylinder 8 was when forwarding tongue piece to and align locked groove 7, reed 11 is pressed into locked groove with tongue piece 12, and turning cylinder 8 can be unblanked or lock this moment.

This pattern manhole cover lock is compared with existing other pattern manhole cover lock, has following advantage:

One, locking is reliable, and anti-theft capability is strong; Because the utility model structure is special, need to unblank conditions such as special key and enough moment, so anti-theft capability is strong.

Two, because rubber plug is housed, is not afraid of dirt and stops up lockhole, because of adopting rubber washer and steel components surfacing, so rust-resisting property is good.

Three, simple in structure, compliance is strong; The transformation that can be used for old well lid is applicable to the installation of new well lid again; Function is brought into play freely, and low cost of manufacture.

Description of drawings:

The structure of Fig. 1-lock and well lid installation drawing (locking state), Fig. 2-movable lock construction figure, Fig. 3-Key structure figure.

Drawing explanation: among Fig. 1: the movable lock of 14-well seat 15-well lid 16-17-pin 18-screw retaining pad 19-screw; Among Fig. 2: 1-tapered end 2-rubber plug 3-sleeve pipe 4-rubber pad 5-nut 6-spring washer 7-locked groove; Among Fig. 3: the axle 9-moving bar 10-screw 11-reed 12-tongue piece 13-pin of 8-key;

Preferred embodiment of the utility model is as follows:

As existing well lid is reequiped, need install and fix lock and movable lock, two screws 19 of pin 17 usefulness and floor clip 18 are fixed on one side of well lid 15 bottom surfaces, movable lock 16 another sides that are installed on well lid bottom surface and the pin 17 same diameter lines, the relevant position of well lid 15 open one with the consistent hole of sleeve pipe 3 termination shapes, sleeve pipe 3 inserts above well lid, make upper end and well lid flush, load onto rubber pad 4, nut 5, spring washer 6, tapered end 1, spring washer 6, nut 5 successively at sleeve pipe 3 hypomeres then.During manhole cover, the long limit of tapered end 1 is turned to and covers the edge, make it to be in lockset position of coupler, again the latch hook of pin 17 is snapped in well seat 14 the flange below, well lid closes, and, make its minor face change well seat 14 flanges below over to private key rotational lock head 1, lock at once, load onto rubber plug 2 at last, the well lid installation.When opening well lid, take out plug 2, with key tapered end 1 is rotated 90 ° and can unblank, open well lid.

When making new well lid, pin 17 can be cast out with well lid, make it into as a wholely, only need installation activity lock to get final product.

Tapered end 1, sleeve pipe 3, pin 17, key axle 8, moving bar 9 and tongue piece 12 are all made with common iron, plating zinc on surface, screw, nut, packing ring and pin are selected surface treated standard component for use, and reed 11 usefulness rubber-like metal material are manufactured, and this product also can adopt the advanced composite material (ACM) manufacturing.

Claims

1, a kind of sewer manhole antitheft lock, comprise pin (17), movable lock (16) and key, it is characterized in that pin (17) is installed in the edge of well lid (15) bottom surface, movable lock (16) has sleeve pipe (3) and tapered end (1), there is cylindrical convex surface sleeve pipe (3) upper end, the convex surface middle part is shaped on cylinder shape groove, rubber plug (2) is housed in the groove, be shaped on screw thread on sleeve pipe (3) external cylindrical surface, the lower end is shaped on locked groove (7), sleeve pipe (3) is equipped with tapered end (1) on a section below the well lid, tapered end (1) is fastened on the appropriate location with nut (5) and spring washer (6), and tapered end (1) is approximate rectangle, and minor face is circular-arc, there is installing hole the centre, on the sleeve pipe between nut and the well lid (15) rubber pad (4) is housed.

2, sewer manhole antitheft lock according to claim 1, it is characterized in that key axle (8) is the cylindrical of two sections different-diameters, top dress moving bar (9), one side of bottom is carved with shallow slot, interior dress reed (11), vertical with shallow slot and be shaped on a groove by the axle center, interior dress tongue piece (12), tongue piece has a slotted hole on (12).