CN2245112Y

CN2245112Y - Safety ladder for building tower crane

Info

Publication number: CN2245112Y
Application number: CN 95234075
Authority: CN
Inventors: 冯国栋; 王德润; 陈广兴; 王美德; 冯勇; 高文绪; 邵志强; 王爱萍; 宋洪兰
Original assignee: 冯国栋
Priority date: 1995-06-12
Filing date: 1995-06-12
Publication date: 1997-01-15
Anticipated expiration: 2005-06-12

Abstract

The utility model discloses a safety ladder for a building tower crane, which relates to a ladder which is installed on the building tower crane for preventing an operator from falling down. The utility model has a structure that a diagonal draw bar, a vertical draw bar and a guard ring are added to a general ladder. When the safety ladder for a building tower crane is used, the diagonal draw bar, the vertical draw bar and the guard ring can be expanded for preventing the operator from falling down; when the safety ladder for a building tower crane is not used, the diagonal draw bar, the vertical draw bar and the guard ring can be folded; the utility model has small size and is convenient for transportation.

Description

Building tower crane safety cat ladder

The utility model relates to and is installed in the ladder that the personnel that prevent on the building tower crane fall.

Building tower crane is the high-rise elevating mechanism that building enterprise the most generally uses, and its pulpit is located at the highest point on tower crane top, overhead tens meters, want operator every day four or five times up and down, and all be that a section cat ladder of side mounting swashes and climbs down outside tower body.The wrong placement between between this cat ladder, joint and joint being, the cat ladder no any protection of blocking in the outside, operator on vertical cat ladder full armrest grab pedal, in case accidentally drop or pedal sky, the accident that must create greater casualties causes very big threat to safe construction.For this reason, have burn-on to protect in the cat ladder outside blocked circle, but because transportation is very inconvenient, therefore, most building enterprises simply do not establish, and dangerous hidden danger is existed always.

The purpose of this utility model is a kind of building tower crane safety cat ladder of transporting can security protection be convenient to again of design.

This building tower crane safety cat ladder comprises two mullions, be fixed on the crossbeam between these two mullions, be provided with hook, lower end in the upper end of each mullion and be provided with angle down, its design feature is to be connected to diagonal member on the top of each mullion by a hook device, the lower end of diagonal member is connected to vertical connecting rod by connector, and guard ring parallel to each other passes vertical connecting rod, two ends are separately fixed on the mullion.

When installing and using, be hooked on this building tower crane safety cat ladder on the crossbeam of tower crane main body by hook, and fix with wire binding, following angle is taken on the crossbeam that is placed on the tower crane main body, also fix with wire binding, at this moment, under action of gravity, diagonal member, vertical connecting rod and guard ring are sagging, be closed state with mullion, then diagonal member be pulled upwardly and drive rising of each guard ring and strut, when each guard ring is vertical with mullion, the upper end of diagonal member is hung on the hook device, make guard ring form a safety net, operator up and down can guarantee safety on cat ladder, because in case accidentally drop or pedal sky, obstruction is all around always arranged, trick all around four direction all can grab extension.During dismounting, diagonal member is taken off from the hook device, at this moment, diagonal member, vertical connecting rod and guard ring are sagging superimposed under action of gravity, remove the steel wire of tying up on hook and the following angle again.Therefore, this building tower crane safety cat ladder, security protection is good in use, in transportation or when depositing because be closed state, volume is little, and is very convenient.

Accompanying drawing shows the embodiment of building tower crane safety cat ladder, wherein Fig. 1 is the structural representation of embodiment, Fig. 2 is the state diagram when strutting of diagonal member, vertical connecting rod and guard ring, Fig. 3 is the state diagram when superimposed of diagonal member, vertical connecting rod and guard ring, Fig. 4 is the structural representation of hook device, and Fig. 5 is the schematic diagram in diagonal member convex-shaped hole, and Fig. 6 is the structural representation of connector, Fig. 7 is the annexation figure of guard ring and mullion, and Fig. 8 goes up a guard ring and the annexation figure of next guard ring and vertical connecting rod most.

In the present embodiment, building tower crane safety cat ladder comprises two mullions 5, be fixed on the crossbeam 2 between these two mullions 5, be provided with hook 1 in the upper end of each root mullion 5, the lower end is provided with down angle 7, top at each mullion 5 is connected to diagonal member 3 by a hook device, the hook device comprises the set bolt 9 that crosses mullion 5 and set bolt 9 is fixed on soldering tip 10 on the mullion 5, be provided with a male ports 8 on the top of diagonal member 3, the lower end of diagonal member 3 is connected to vertical connecting rod 6 by connector, connector comprises and crosses diagonal member 3, the bolt 11 of vertical connecting rod 6 and packing ring 13, be inserted into the steady pin 12 on bolt 11 latter ends, guard ring 4 parallel to each other passes vertical connecting rod 6, two ends are by packing ring 14, steady pin 15 is fixed on the mullion 5, guard ring 4 go up most one and next root by packing ring 16, steady pin 17 is fixed on the vertical connecting rod 6.

Claims

1, a kind of building tower crane safety cat ladder, comprise two mullions (5), be fixed on the crossbeam (2) between these two mullions (5), be provided with hook (1), lower end in the upper end of each mullion (5) and be provided with angle (7) down, it is characterized in that being connected to diagonal member (3) by a hook device on the top of each mullion (5), the lower end of diagonal member (3) is connected to vertical connecting rod (6) by connector, and guard ring parallel to each other (4) passes vertical connecting rod (6), two ends are separately fixed on the mullion (5).

2,, it is characterized in that the hook device comprises the set bolt 9 that crosses mullion 5 and set bolt 9 is fixed on soldering tip (10) on the mullion (5) according to the said building tower crane safety of claim 1 cat ladder.

3,, it is characterized in that the top of diagonal member (3) is provided with a male ports (8) according to the said building tower crane safety of claim 2 cat ladder.

4,, it is characterized in that connector comprises the bolt (11) that crosses diagonal member (3), vertical connecting rod (6) and packing ring (13), is inserted into the steady pin (12) on bolt (11) latter end according to the said building tower crane safety of claim 1 cat ladder.