CN2687260Y

CN2687260Y - Manhole cover anti-theft lock and its key

Info

Publication number: CN2687260Y
Application number: CN 200320114998
Authority: CN
Inventors: 蒋仲明
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-29
Filing date: 2003-10-29
Publication date: 2005-03-23
Anticipated expiration: 2013-10-29

Abstract

The utility model discloses a manhole cover anti-theft lock and its key, comprising a lock with a manhole cover as the base and a key to the lock. The lock is arranged in the middle part of the back side of the manhole cover with a lock hole and comprises lock rods provided symmetrically with the number from two to six. One end of the key disclosed by the utility model is movably provided with a spring and a spring base, the other end is provided with screw thread and holes, the middle part is provided with the draw rod of a push rod as the main body, and the inner side of the push rod is provided with ejector pins and impact blocks having the number from two to six and corresponding to the lever of a lock rod base, and the middle part is also provided with a locating sleeve and a regulating nut through the draw rod. The anti-theft lock and the key of the utility model must be used together and are the anti-theft devices that can not be seen and touched and have good and safe anti-theft performance to protect the manhole cover from being opened easily, and can be used not only on the manhole cover but also on the door of the carriage in the train transportation, on the door of the container in the water transportation, and on the anti-theft switch of the electric device.

Description

Manhole antitheft lock and key thereof

Technical field the utility model relates to a kind of lockset, particularly a kind of sewer manhole antitheft lock and key thereof.

Background technology sewer well lid is one of device indispensable in the sewerage, be seen everywhere on the road in these streets and lanes in the city, but domestic these general sewer well lids can only cover the well head of sewer at present, because lockset is not installed, thereby there is not an anti-theft feature, as long as have the sharp device of human to be inserted in the slit of sewer well lid periphery or a sled up in the eyelet on the sewer well lid, this sewer well lid just can be opened, and is stolen by the lawless person.Cause unnecessary loss to country, thereby hide some dangers for owing to often failing in time to add a cover after stolen in addition, car and pedestrian accidentally will fall into one's trap, and lead to the accident that car is spoken sarcastically and hindered.

The summary of the invention the purpose of this utility model is to overcome the deficiencies in the prior art part, design a kind of rational in infrastructure, sewer manhole antitheft lock and key thereof that performance is safe and reliable, it comprises lockset and opens the key of lockset, lockset described in the utility model is to be that pedestal is installed in the well lid back side that the middle part has lockhole with the well lid, the lock bar seat that this lockset is installed by 2-6 symmetry is formed, each lock bar seat comprises two bracing frames that are set up in parallel, one end of bracing frame band base is fixedlyed connected with well lid, the other end leaves circular hole, the baffled locking bar in end injects by spring in the circular hole of two bracing frames that are set up in parallel, and locking bar flexibly connects near an end of lockhole and the top of lever.Key described in the utility model is equipped with spring and spring base with an end activity, the other end is threaded and eyelet, the pull bar that push rod is equipped with in the middle part is a main body, 2-6 and corresponding push rod of the lever of lock bar seat and collision block are housed in the push rod (16) in addition, a positioning sleeve and adjusting nut also are housed by pull bar.

Lockset of the present utility model is made up of symmetrically arranged a plurality of lock bar seats around the lockhole of the well lid back side.When well lid is in closed condition, locking bar on each lock bar seat injects the crib peripheral base on the sewer mouth firmly, because the locking bar on the theftproof lock is more, can not open well lid even destroy wherein one, two locking bar, so sewer manhole cover anti-theft performance is installed reliable.

The utility model is described in further detail below in conjunction with drawings and Examples for description of drawings.

Fig. 1 is the structural representation of the utility model lockset

Fig. 2 is the structural representation of the utility model key

Fig. 3 is the vertical view of the utility model lockset

The specific embodiment is shown in accompanying drawing 1-3, and manhole antitheft lock of the present utility model and key thereof comprise lockset and the key of opening lockset.Lockset described in the utility model is to be that pedestal is installed in well lid 2 back sides that the middle part has lockhole 1 with the well lid, the lock bar seat 3 that this lockset is installed by 2-6 symmetry is formed, each lock bar seat 3 comprises two bracing frames that are set up in parallel 4, one end of bracing frame 4 band bases 5 is fixedlyed connected with well lid 2, the other end leaves circular hole 6, an end has in the circular hole 6 of locking bar 8 by two bracing frames that are set up in parallel 4 of spring 9 reeves of baffle plate 7, and locking bar 8 flexibly connects near an end of lockholes 1 and the top of lever 10.

Key described in the utility model is equipped with spring 11 and spring base 12 with an end activity, the other end is threaded 13 and eyelet 14, the pull bar 15 that push rod 16 is equipped with in the middle part is main body, the lever 10 corresponding push rods 17 and the collision block (18) of 2-6 and lock bar seat 3 are housed in the push rod 16 in addition, a positioning sleeve 19 and adjusting nut 20 also are housed by pull bar 15.In addition, the shape of lockhole 1 on the well lid according to the shape difference of key push rod 16, can be circular, square, triangle or hexagon.

Operating principle: lock ﹠ key of the present utility model must be used, and described key is according to the difference of open hole, can do circular, square, triangle or hexagon.Lock below the well lid of the present utility model (2) is in closed condition at ordinary times, be that following all locking bars (8) of well lid (2) all are inserted in below the crib (21), well lid (2) can not be opened, utilizing the nut on the key (20) that injects by well lid lockhole (1) to comply with on the screw thread rotation pushing drawing rod (15) during unlatching moves, push rod (16) is moved down, compression spring (11) also drives collision block (18) release push rod (17), swivel nut (20) makes push rod (17) withstand the lever (10) of lock bar seat (3) to certain position, spur locking bar (8) simultaneously away from crib (21), lockset is opened automatically.When taking out key, must make nut (20) rotate to original position, under the effect of lock bar seat (3) upper spring (9), promote lever (10) and upwards move, pull bar (15) makes it cut out push rod (17) and can take out key to moving down.

The utility model belongs to a kind of be cannot see, impalpable anti-theft device, can not be opened easily, theftproof performance is safe and reliable, it singly is not used for the antitheft of well lid, also can be used on the lorry door in the railway transportation, on the container door in the water route transportation or on the electric appliance anti-theft switch, this anti-theft device can arbitrarily be made the type that varies in size according to the practical development needs, and available plastic production, gets rusty to prevent burglary-resisting system.

Claims

1, a kind of manhole antitheft lock and key thereof comprise lockset and the key of opening lockset, it is characterized in that:

1) lockset described in the utility model is to be well lid (2) back side that pedestal is installed in the middle part and has lockhole (1) with the well lid, the lock bar seat (3) that this lockset is installed by 2-6 symmetry is formed, each lock bar seat (3) comprises two bracing frames that are set up in parallel (4), one end of bracing frame (4) band base (5) is fixedlyed connected with well lid (2), the other end leaves circular hole (6), an end has in the circular hole (6) of locking bar (8) by spring (9) two bracing frames that are set up in parallel of reeve (4) of baffle plate (7), and locking bar (8) flexibly connects near an end of lockhole (1) and the top of lever (10).

2) key described in the utility model is equipped with spring (11) and spring base (12) with an end activity, the other end is threaded (13) and eyelet (14), the pull bar (15) that push rod (16) is equipped with in the middle part is main body, the corresponding push rod of lever (10) (17) and the collision block (18) of 2-6 and lock bar seat (3) are housed in the push rod (16) in addition, a positioning sleeve (19) and adjusting nut (20) also are housed by pull bar (15).

2, manhole antitheft lock according to claim 1 and key thereof is characterized in that: the shape of lockhole on the well lid (1) according to the shape difference of key push rod (16), can be circular, square, triangle or hexagon.