CN203547292U

CN203547292U - Protection lock and key set for elevator fire-fighting switch

Info

Publication number: CN203547292U
Application number: CN201320679466.XU
Authority: CN
Inventors: 史洪涛
Original assignee: Beijing Shenghua Elevator Group Co Ltd
Current assignee: Beijing Shenghua Elevator Group Co Ltd
Priority date: 2013-10-31
Filing date: 2013-10-31
Publication date: 2014-04-16
Anticipated expiration: 2023-10-31

Abstract

The utility model relates to a protection lock and key set for an elevator fire-fighting switch. The protection lock and key set comprises a protection lock and a key. The key is composed of a key handle, a connecting rod and an inner triangular key head. A lock sleeve is arranged in the protection lock. An outer triangular lock cylinder is arranged in the middle of the lock sleeve. The arc surface, on the rear portion of the inner triangular key head, of the connecting rod is provided with a groove in the axis direction. A folding knife is arranged in the groove. The front end of the folding knife is hinged to the connecting rod. A lock cover is arranged on the outer side of the lock sleeve and is provided with a U-shaped through hole corresponding to the outer triangular lock cylinder of the lock sleeve. A protruding block is arranged on the outer side of the rear end of the folding knife. By means of the technical scheme, the requirement that the key cannot be pulled out when the lock is opened according to novel elevator fire-fighting standards can be effectively met, and an existing protection lock can be opened conveniently; moreover, the protection lock and key set is simple in structure and high in practicability.

Description

Elevator fire-fighting switch Protective lock and key

Technical field

The utility model relates to a kind of Protective lock, particularly relates to a kind of elevator fire-fighting switch Protective lock and key.

Background technology

As Figure 1-Figure 5, in the prior art, elevator fire-fighting switch is all generally that in using, triangular key is carried out switch, the drive link 2 of key is through Protective lock bottom opening, interior triangular key 3 is overlapped outside on chain of triangulation core 5, and rotation key handle 1, can drive Protective lock to open or close.

In new elevator fire-fighting standard, elevator is with fireman's switch when opening with key, and key can not be extracted, and interior triangular key of the prior art and Protective lock can not meet this requirement.

Utility model content

In view of this, main purpose of the present utility model is to provide a kind of elevator fire-fighting switch Protective lock and key, by the technical program, not only can be suitable in prior art, also can meet new elevator fire-fighting standard, the requirement that key can not be extracted when opening.

In order to achieve the above object, the technical solution of the utility model is achieved in that a kind of elevator fire-fighting switch Protective lock and key, include protection lock & key, described key consists of key handle, connecting rod and interior triangular key head, in described Protective lock, be provided with lock tube, in the middle of lock tube, be provided with outer triangle lock core, on the arc surface of described interior triangular key back of head connecting rod, along axis direction, be provided with groove, in groove, be provided with jackknife, front end and the connecting rod of described jackknife are hinged; Described lock tube arranged outside has locking closure, is provided with the U-shaped open-work corresponding with the outer triangle lock core of lock tube on described locking closure.

Described jackknife rear end is provided with protruding block on outside.

Adopt the beneficial effect after technique scheme to be: a kind of elevator fire-fighting switch Protective lock and key, pass through the technical program, not only can effectively meet new elevator fire-fighting standard, the requirement that key can not be extracted when opening, for existing Protective lock, also can open easily simultaneously, and simple in structure, practical.

Accompanying drawing explanation

Fig. 1 is key schematic diagram in prior art.

Fig. 2 is the right view of Fig. 1.

Fig. 3 is Protective lock lock tube schematic diagram in prior art.

Fig. 4 is Protective lock structural representation in prior art.

Fig. 5 protects lock & key application state figure in prior art.

Fig. 6 is key schematic diagram in the utility model.

Fig. 7 is jack knife opening schematic diagram in the utility model key.

Fig. 8 is Protective lock lock core schematic diagram in the utility model.

Fig. 9 is that the utility model is used state diagram under fire mode.

Figure 10 is that the utility model is used state diagram under non-fire mode.

In figure, 1 key handle, 2 connecting rods, 3 interior triangular key heads, 4 lock tubes, 5 outer triangle lock cores, 6 grooves, 7 jackknifes, 8 locking closures, 9 U-shaped open-works, 10 projections.

The specific embodiment

Below in conjunction with accompanying drawing, specific embodiment in the utility model is described in further detail.

As Figure 6-Figure 8, elevator fire-fighting switch Protective lock and key that the utility model relates to, include protection lock & key, described key consists of key handle 1, connecting rod 2 and interior triangular key 3, in described Protective lock, be provided with lock tube 4, in the middle of lock tube 4, be provided with outer triangle lock core 5, on the arc surface of a described interior triangular key 3 rear portion connecting rod 2, along axis direction, be provided with groove 6, in groove 6, be provided with jackknife 7, the front end of described jackknife 7 and connecting rod 2 are hinged; Described lock tube 4 arranged outside have locking closure 8, are provided with the U-shaped open-work 9 corresponding with the outer triangle lock core 5 of lock tube 4 on described locking closure 8.

Described jackknife is provided with projection 10 on 7 outsides, rear end.

As shown in Figure 8 and Figure 9, when the utility model is worked under fire mode, projection 10 has been removed on the key, the interior jackknife 7 of groove 6 produces, and jackknife 7 and connecting rod 2 are inserted in lock tube 4 by the U-shaped open-work 9 on locking closure 8, and interior triangular key 3 is sleeved on outer triangle lock core 5, rotate key handle 1 and open Protective lock, simultaneously locking closure 8 keeps off and on jackknife 7, makes key extract, and key can only rotate back into and shut position and just can extract, and has met the needs of new elevator fire-fighting standard; While applying under non-fire mode, as long as jackknife 7 is put back in groove 6, identical with key of the prior art.

The above, be only better possible embodiments of the present utility model, not in order to limit scope of the present utility model.

Claims

1. an elevator fire-fighting switch Protective lock and key, include protection lock & key, described key consists of key handle, connecting rod and interior triangular key head, in described Protective lock, be provided with lock tube, in the middle of lock tube, be provided with outer triangle lock core, it is characterized in that, on the arc surface of described interior triangular key back of head connecting rod, along axis direction, be provided with groove, in groove, be provided with jackknife, front end and the connecting rod of described jackknife are hinged; Described lock tube arranged outside has locking closure, is provided with the U-shaped open-work corresponding with the outer triangle lock core of lock tube on described locking closure.

2. elevator fire-fighting switch Protective lock according to claim 1 and key, is characterized in that, described jackknife rear end is provided with protruding block on outside.