CN2779002Y

CN2779002Y - Anti-theft well cover lock and its unlocking spanner

Info

Publication number: CN2779002Y
Application number: CN 200520023719
Authority: CN
Inventors: 邢建中
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-28
Filing date: 2005-03-28
Publication date: 2006-05-10
Anticipated expiration: 2015-03-28

Abstract

The utility model relates to an anti-theft well cover lock and an unlocking spanner thereof. The anti-theft well cover lock comprises a lock rod and a lock tongue. The upper end of the lock rod is a cylindrical lock rod head. The lock tongue and the lock rod are fastened together. The utility model is characterized in that the cylindrical lock rod head is provided with a conical hole, and the opening of the conical hole is small, and the hole of the conical hole is large. A compression spring can be sheathed on the lock rod. A positioning pin is fastened by the lock tongue. When the anti-theft well cover lock is used, the lock rod is installed at a lock seat of a well cover plate. The unlocking spanner comprises a spanner rod and an unlocking head. The utility model is characterized in that the spanner rod and the unlocking head are two-body structures. The spanner rod is provided with a handle and a conical table. The middle part of the spanner rod is provided with an outer thread. An expansion cylinder is screwed on the spanner rod. The unlocking head is an expanding lock head, and is arranged on one end of the expansion cylinder. An inner thread and an inner light hole are arranged in the expansion cylinder. The expansion unlocking head and the inner light hole are provided with a plurality of longitudinal grooves. The outer diameter of the expansion unlocking head is matched with a hole opening of the conical hole of the anti-theft well cover lock. The expansion unlocking head is provided with a conical hole. The inner conical surface of the conical hole is matched with the outer conical surface of the conical table of the spanner rod. The anti-theft well cover lock and the unlocking spanner thereof have simple structure, firmness, reliability and good anti-theft performance.

Description

A kind of anti-stealing manhole cover lock and the spanner of unblanking thereof

Technical field

The spanner of unblanking that the utility model relates to a kind of anti-stealing manhole cover lock and uses simultaneously.

Background technology

Cable shaft, following well and tap water pipe well are a lot of on the road now, the various aboveground well lids that are covered with, and losing of well lid is very serious, after well lid is lost, not only causes any property loss, and can cause personal injury.In order to prevent that well lid from losing, various anti-stealing manhole covers locks are disclosed, what have uses padlock, and what have uses dead bolt.The former locks the son damage that gets rusty easily, and complex structure, and the latter is opened easily.

Summary of the invention

In order to overcome the above-mentioned deficiency of existing anti-stealing manhole cover lock, the utility model provides a kind of simple in structure, anti-stealing manhole cover lock of being difficult to open, and a kind of and this phase-locked mutual correlation, the spanner of unblanking of use simultaneously are provided.

The utility model provides a kind of anti-stealing manhole cover lock of dead bolt, it comprises locking bar, dead bolt, the upper end of locking bar is the cylinder lock rod head, dead bolt tightens together with the lower end of securing member and locking bar, it is characterized in that: the conical bore of opening usefulness is arranged at the top of cylinder lock rod head, the orifice diameter of conical bore less than the hole of conical bore at the bottom of diameter.The angle of the relative axial ray of lock rod of bus of the internal conical surface of conical bore is generally 15 °-20 °.

In order to increase theftproof performance, can overlap a compression spring, the fastening alignment pin of dead bolt at locking bar.The compression spring is installed in the lock of well lid plate during installation, and there is a locating hole lock lower surface, and the well lid plate covers on the well seat, and the alignment pin of dead bolt inserts locating hole under the effect of compression spring.

Comprise the wrenching bar with handle, the head of unblanking with the spanner of unblanking of the phase-locked mutual correlation of above-mentioned anti-stealing manhole cover, use simultaneously, it is characterized in that: wrenching bar is two body structures with the head of unblanking, one end of wrenching bar is a handle, the other end is the frustum of a cone, wrenching bar is connected at the bottom of the roundlet of the frustum of a cone, be the end face diameter of the frustum of a cone other axle profile diameter of hanging down greater than the frustum of a cone, there is one section external screw thread at the middle part of wrenching bar, and the angle of the bus of the frustum of a cone of wrenching bar and wrenching bar axis is generally 13 °-16 °; Expansion cylinder at the wrenching bar overcoat, the said head of unblanking is to expand tapered end, unthreaded hole in one section internal thread and one section is arranged in the expansion cylinder, expansion cylinder is screwed in outside the wrenching bar by this internal thread, there are two grooves of symmetry in the expansion cylinder outside or U-shaped card as handle is installed, expand the end of tapered end at the interior unthreaded hole of expansion cylinder, expanding tapered end and interior unthreaded hole has some cannelures, expanding the external diameter of tapered end and the aperture of the conical bore that anti-stealing manhole cover is locked matches, expanding tapered end has an axial tubaeform conical bore, and the outer conical surface of the internal conical surface of conical bore and the frustum of a cone of wrenching bar matches.

This anti-stealing manhole cover lock is taked above-mentioned structure with the special-purpose spanner of unblanking, simple in structure, it is convenient to open, solid reliable, the conical bore tapering is little, and the conical bore side is smooth, can't open this anti-stealing manhole cover lock with other instrument, have only with the spanner of unblanking of the present utility model and could open the well lid plate, theftproof is good.Adopt dead bolt to have the anti-stealing manhole cover lock of alignment pin, theftproof is better.

Description of drawings

Fig. 1 is the structure chart of this anti-stealing manhole cover lock embodiment one, partly cut-away among the figure.

Fig. 2 is the structure chart of spanner embodiment one of originally unblanking, and vertically cuts open among the figure.

Fig. 3 is the structure chart of wrenching bar.

Fig. 4 is the axial sectional view of expansion cylinder.

Fig. 5 is to view along the A among Fig. 4.

Fig. 6 is the sectional view along A-A line among Fig. 4.

Fig. 7 is the reference diagram of installing and using of this anti-stealing manhole cover lock embodiment one, and Fig. 1 amplifies relatively.

Fig. 8 is this antitheft structure chart that advances cover lock and the spanner embodiment two that unblanks, among the figure for installing and using state.

Among the above-mentioned figure:

1, anti-stealing manhole cover lock 2, locking bar 3, connection screw thread 4, dead bolt 5, screw

6, packing ring 7, hex nut 8, taper seat 9, conical bore 10, cylinder lock rod head

11, unblank spanner 12, wrenching bar 13, handle 14, through hole 15, expansion nozzle

16, external screw thread 17, expansion cylinder 18, internal thread 19, interior unthreaded hole 20, expand tapered end

21, conical bore 22, the frustum of a cone 23, outer conical surface 24, cannelure 25, internal conical surface

26, expanding noodles 27, groove 28, well lid plate 29, lock 30, through hole

31, spacing collar 32, well seat 33, the spanner 34 of unblanking, vertical axis hole 35, U-shaped card

36, anti-stealing manhole cover lock 37, compression spring 38, shoulder hole 39, alignment pin 40, locating hole

The specific embodiment

Below in conjunction with the detailed structure of embodiment and this anti-stealing manhole cover of the description of drawings lock and the spanner of unblanking, but this anti-stealing manhole cover lock is not limited to following embodiment with the wrench of unblanking.

It comprises locking bar 2, dead bolt 4 anti-stealing manhole cover that Fig. 1 provides lock 1, the upper end of locking bar 2 is the cylinder lock rod heads 10 that are used to install, dead bolt 4 has screw 5, dead bolt 4 is tightened together by screw 5, packing ring 6 and hex nut 7 lower end with locking bar 2, it is characterized in that: the conical bore 9 of opening usefulness is arranged at the top of cylinder lock rod head 10, the orifice diameter of conical bore 9 less than the hole of conical bore 9 at the bottom of diameter, the orifice diameter of conical bore 9 is 24 millimeters in the present embodiment, on be limited to 24.1 millimeters.The angle of the relative axial ray of lock rod of bus of the taper seat 8 of conical bore 9 is 16 °.

The embodiment two of this anti-stealing manhole cover lock sees Fig. 8, and it is also to overlap compression spring 37 outside locking bar 2 with the difference of the embodiment one that anti-stealing manhole cover is locked, dead bolt 4 fastening an alignment pin 39.Compression spring 37 is installed in the shoulder hole 38 of lock 29 of well lid plate 28 during installation, and there is a locating hole 40 lock 29 lower surfaces, and well lid plate 28 covers on the spacing collar 31 of well seat 32, and the alignment pin 39 of dead bolt 4 inserts in the locating hole 40 under the effect of compression spring 37.

The spanner 11 of unblanking that Fig. 2, Fig. 3 and Fig. 4 provide comprises the wrenching bar 12 with handle 13, the head of unblanking, it is characterized in that: wrenching bar 12 is two body structures with the head of unblanking, wrenching bar 12 is tightening handle 13, the lower end is the frustum of a cone 22, wrenching bar 12 is connected at the bottom of the roundlet of the frustum of a cone 22, and promptly the end face diameter of the frustum of a cone 22 is greater than other axle profile diameter of hanging down of the frustum of a cone 22.There is one section external screw thread 16 at the middle part of wrenching bar 12, and the angle of the bus of the frustum of a cone 22 of wrenching bar and wrenching bar 12 axis is 14.5 °.Expansion cylinder 17 at wrenching bar 12 overcoats, the said head of unblanking is to expand tapered end 20, expand the lower end of tapered end 20 at expansion cylinder 17, unthreaded hole 19 in one section internal thread 18 and one section is arranged in the expansion cylinder 17, expansion cylinder 17 is screwed in outside the wrenching bar 12 by internal thread 18, there are two grooves 27 of symmetry in expansion cylinder 17 outsides, referring to Fig. 6, expand the end of tapered end 20 at interior unthreaded hole 19, with interior unthreaded hole 19 four cannelures 24 are arranged expanding tapered end 20, referring to Fig. 5, the aperture that the external diameter that expands tapered end 20 and anti-stealing manhole cover are locked 1 conical bore 9 matches, present embodiment is 24 millimeters, is limited to 23.9 millimeters down.Expanding tapered end 20 has an axial tubaeform conical bore 21, and the internal conical surface 25 of conical bore 21 matches with the frustum of a cone 22 outer conical surface 23 of wrenching bar 12.

Originally unblank the embodiment two of spanner referring to Fig. 8, the difference of unblank spanner 33 and the spanner 11 of unblanking of present embodiment is that the bayonet socket of playing 34, one U-shaped cards 35 of two vertical axis holes in the both sides of expansion cylinder 17 is stuck in two vertical axis holes 34.In use, a U-shaped card 35 that holds as handle, another hand rotating spanner bar 12 is operated.

The installation of this anti-stealing manhole cover lock is seen Fig. 7 with the use of the spanner of unblanking, and this anti-stealing manhole cover lock 1 is installed in by locking bar 2 in the through hole 30 of lock 29 of well lid plate 28.In the time will pinning well lid plate 28, the tapered end 20 that expands with the spanner 11 of unblanking inserts in the conical bore 9, clamp two grooves 27 of expansion cylinder 17 with other instrument, rotating spanner bar 12, the unblank tapered end 20 that expands of spanner 11 struts, it is locked with the conical bore 9 of anti-stealing manhole cover lock 1 to expand tapered end 20, the rotation spanner 11 of unblanking, drive locking bars 2 by the spanner 11 of unblanking and rotate, dead bolt 4 is forwarded to the spacing collar 31 times of well seat 32, can lock together well lid plate 28 and well seat 32, rotate the spanner 11 of unblanking in the opposite direction, the frustum of a cone 22 breaks away from conical bore 21, expands tapered end 20 and restore under elastic reaction, can transfer to the spanner 11 of unblanking.In the time will driving a well cover plate 28, the tapered end 20 that expands of the spanner 11 of unblanking is inserted in the conical bore 9, rotating spanner bar 12, it is locked with the conical bore 9 of anti-stealing manhole cover lock 1 to expand tapered end 20, the rotation spanner 11 of unblanking drives locking bars 2 by the spanner 11 of unblanking and rotates, and dead bolt 4 is left the spacing collar 31 of well seat 32, upwards draw back lock spanner 11, can open well lid plate 28.

The anti-stealing manhole cover that uses dead bolt 4 to have alignment pin 39 was locked 36 o'clock, compression spring 37 is installed in the shoulder hole 38 of well lid plate 28 locks 29, in the time of will locking together well lid plate 28 and well seat 32, the alignment pin 39 of dead bolt 4 inserts lock 29 locating holes 40 under the effect of compression spring 37.In the time will opening well lid plate 28, spanner 11 packages with anti-stealing manhole cover lock 36 unblanking, under push the spanner 33 of unblanking, also locking bar 2 tongues 4 with lock are subdued simultaneously, alignment pin 39 breaks away from locating hole 40, rotates the spanner 33 of unblanking again, can leave dead bolt 4 spacing collar 31 of well seat, upwards draw back lock spanner 33, can open well lid plate 28.

Claims

1, a kind of anti-stealing manhole cover lock, it comprises locking bar, dead bolt, and the upper end of locking bar is the cylinder lock rod head, and dead bolt tightens together with the lower end of securing member and locking bar, it is characterized in that: the conical bore of opening usefulness is arranged at the top of cylinder lock rod head, the orifice diameter of conical bore less than the hole of conical bore at the bottom of diameter.

2, anti-stealing manhole cover lock according to claim 1, it is characterized in that: the angle of the relative axial ray of lock rod of bus of the internal conical surface of conical bore is 15 °-20 °.

3, anti-stealing manhole cover according to claim 1 and 2 lock is characterized in that: overlapping the compression spring at locking bar, dead bolt fastening an alignment pin.

4, a kind of spanner of unblanking, it comprises the wrenching bar with handle, the head of unblanking, it is characterized in that: wrenching bar is two body structures with the head of unblanking, one end of wrenching bar is a handle, the other end is the frustum of a cone, wrenching bar is connected at the bottom of the roundlet of the frustum of a cone, and there is one section external screw thread at the middle part of wrenching bar, and the angle of the bus of the frustum of a cone of wrenching bar and wrenching bar axis is 13 °-16 °; Expansion cylinder at the wrenching bar overcoat, the said head of unblanking is to expand tapered end, unthreaded hole in one section internal thread and one section is arranged in the expansion cylinder, expansion cylinder is screwed in outside the wrenching bar by this internal thread, there are two grooves of symmetry in the expansion cylinder outside or U-shaped card as handle is installed, expand the end of tapered end at the interior unthreaded hole of expansion cylinder, expanding tapered end and interior unthreaded hole has some cannelures, expanding the external diameter of tapered end and the aperture of the conical bore that anti-stealing manhole cover is locked matches, expanding tapered end has an axial tubaeform conical bore, and the outer conical surface of the internal conical surface of conical bore and the frustum of a cone of wrenching bar matches.