CN2227700Y - Theft drain cover and its opening tool - Google Patents

Abstract

The utility model discloses a theft-proof drain cover and an opening tool thereof. The drain cover connects a cover plate and a drain ring by an axle pin. The back side of the cover plate is fixed with a lock. A lock tongue is in an inverse T-shaped structure. The cover plate is locked by the shaft pin and the lock. The opening tool is composed of a handle, a key rod, and a key head which is a transverse piece perpendicular to the key rod. After the opening tool is inserted in the cover plate, the key head contacts the inverse T-shaped lock tongue. The handle is rotated to open the lock, and then the drain cover can be unlocked. The utility model has the advantages of simple structure, easy opening, burliness, durability, and high theft-proof performance.

Description

Anti-stealing manhole cover and opener thereof

The application belongs to the building pipe technical field and relates in particular to a kind of anti-stealing manhole cover and special-purpose opener thereof.

At present, all kinds of casting iron well lids of laying on the road are all by standard production, cover plate separates with walling crib, cover plate is placed directly on the walling crib, and the stolen phenomenon of this casting iron well lid often takes place in various places, has brought many inconvenience to the pedestrian, serious even the pedestrian caused injury, some places connect together cover plate and walling crib with pivot pin, since simple in structure, the stolen of well lid still can not effectively be prevented.

The application's purpose is to disclose a kind of anti-stealing manhole cover and opener thereof.

For finishing above-mentioned purpose, provide technical scheme as follows: anti-stealing manhole cover is made up of cover plate, walling crib, lock three parts.Cover plate places on the walling crib, the side of cover plate and walling crib is along connecting together by pivot pin, the back side at a corresponding side cover plate is equipped with lock, lock is made of lock housing, snap, dead bolt, dead bolt and snap are positioned at lock housing, special feature is that the dead bolt of this lock is not elongated straight dead bolt, but has one to cross out part on straight dead bolt, and this dead bolt is

The shape structure, this crosses out part and is the opening point of opener; And the opener patchhole is arranged on the surface of cover plate.The opener of anti-stealing manhole cover is a kind of private key, by handle, and key bar, key bit is formed, and key bit is the transverse sheet vertical with key bar.

The point control (pivot pin connection) that the anti-stealing manhole cover of this structure will have well lid now changes two point control into, promptly be added with lock in respective side, because the special construction of dead bolt and opener, make general tool can not open this lock, both enabled to insert the open hole on the cover plate, can not touch dead bolt and lock is opened, have only when the special opening instrument and insert cover plate, just can touch after rotating 180 °

The shape dead bolt cross out part, be rotated further and lock can be opened.Thereby guaranteed the theftproof performance of well lid, also overcome the drawback of lockset and the easy corrosion of opener simultaneously.

Below in conjunction with the embodiment accompanying drawing the application is described in further detail

Fig. 1 is the contour structures schematic diagram of anti-stealing manhole cover

Fig. 2 be Fig. 1 along A-A to cross-sectional view

Fig. 3 is the contour structures schematic diagram that anti-stealing manhole cover is locked

Fig. 4 be Fig. 3 along B-B to cross-sectional view

Fig. 5 is the main TV structure figure of opener

Fig. 6 is an opener side-looking structure chart

Fig. 7 is another embodiment outline drawing of anti-stealing manhole cover

Fig. 1, Fig. 2 show the outside and the internal construction of anti-stealing manhole cover, anti-stealing manhole cover is made up of cover plate 1, walling crib 2, lock 3 three parts, cover plate 1 is connected by pivot pin 9 with walling crib 2, connects side at the corresponding pivot pin in the bottom of cover plate 1 lock 3 is housed, and opener patchhole 4 and lockset fixing hole 5 are arranged on the cover plate 1; Fig. 3, Fig. 4 show the structure of lockset, and lock 3 is made up of lock housing 6, snap 7 and dead bolt 8, and snap 7, dead bolt 8 are positioned at lock housing 6, and particularly dead bolt 8 is different with common straight dead bolt, and it is to have one to cross out part 10 on common straight dead bolt, and this dead bolt 8 is The shape structure, when lock during 3 locking cover plates 1, dead bolt 8 will enter in the dead bolt hole 11 on the walling crib 2, with pivot pin 9 actings in conjunction well lid is pinned securely; Fig. 5, Fig. 6 shows the structure of special opening instrument, this instrument is by handle 12, key bar 13, key bit 14 constitutes, handle 12 connects key bar 13, key bit 14 is transverse sheets perpendicular with key bar 13, when opening well lid, key bar 13 is placed opener patchhole 4, because hole 4 is reverse design, therefore inserting back key bit 14 can not contact with the part 10 that crosses out on the dead bolt 8, when laterally rotating 12 to 180 ° on handle, key bit 14 contacts with the part 10 that crosses out on the dead bolt 8, and is rotated further handle 12, and key bit 14 will force dead bolt 8 to withdraw from from dead bolt hole 11.This moment is carrying handle 12 upwards, and key bit 14 contacts the cover plate back side simultaneously, cover plate can be opened, and is convenient to constructor's operation.

Fig. 7 is another embodiment of anti-stealing manhole cover, and this well lid is a garden shape, pivot pin be locked on the diameter line of well lid, under the walling crib of well lid the convex edge is arranged, therefore do not need special dead bolt hole, dead bolt to enter and can pin cover plate below the convex edge of walling crib.This well lid has both increased disguise because the opener patchhole is a reverse design, has improved theftproof again.The application's anti-stealing manhole cover is simple in structure, and it is convenient, durable to open, and is difficult for getting rusty, and has solved the stolen problem of city manhole cover effectively.

Claims (2)

1, anti-stealing manhole cover is made up of cover plate and walling crib, and cover plate is that pivot pin is connected with a side of walling crib, is fixed with lock at the back side of its corresponding side cover plate, and lock is made up of lock housing, snap, dead bolt, and dead bolt and snap are positioned at lock housing, it is characterized in that the structure of dead bolt is Shape has on the cover plate and the corresponding patchhole of opener.

2, the opener of the described anti-stealing manhole cover of a kind of claim 1 is characterized in that it is made up of handle, key bar, key bit, and handle connects key bar, and key bit is and key bar transverse sheet connected vertically.

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