Jack ladder with upper end locked by controlling of lower part

Abstract

The invention discloses a jack ladder with the upper end being locked by the controlling of the lower part, and relates to a jack ladder. A flat bar (1) is arranged between two short vertical pipes (8). Two rear bayonet blocks are correspondingly fixed at the upper ends of two short vertical pipes, the upper parts of lifting rods (4) correspondingly arranged in the two short vertical pipes penetrate through holes (19) of two insert blocks (6). Bottom plates (27) are correspondingly arranged on the lower end ports of the short vertical pipes. The upper end surfaces of protruding rings (23) arranged on the middle parts of the two lifting rods abut on the lower end surfaces (22) of the two insert blocks, springs (25) sleeved on the two lifting rods correspondingly abut on the two protruding rings and the two bottom plates, the lower ends of the two lifting rods correspondingly penetrate through light holes (28) of the two bottom plates and are connected with the upper ends of two drawstrings (10). The upper end of a lift bar (11) is fixedly connected to the middle of the flat bar, and the upper end of the jack ladder is connected to the flat bar. The jack ladder uses the lift bar to catch strips by the two rear bayonet blocks, the two lifting rods control the opening and closing of the bayonet to realize the control of controlling the upper end of the crawling ladder to connect bars by the lower part.

Description

technical field [0001] The invention relates to a soft ladder, in particular to a soft ladder whose upper end is locked by the lower part. Background technique [0002] As known, in the power industry or other constructions, it is often necessary to use a ladder with two hooks on the upper part to carry out construction operations. The objects hooked by the upper part of the ladder include soft strips such as cables and ropes. Because these soft strips The object has a certain elasticity, so it often occurs that the hook is detached under the strong springing force of the strip, which leads to a great safety hazard. In the prior art, there is no technology for the lower part to control the locking of the upper end of the ladder, so it is necessary to Improve on this technique. Contents of the invention [0003] In order to overcome the deficiencies in the background technology, the present invention discloses a soft ladder whose upper end is locked by the lower part. The ...

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Problems solved by technology

[0002] As known, in the power industry or other constructions, it is often necessary to use a ladder with two hooks on the upper part to carry out construction operations. The objects hooked by the upper part of the ladder include soft strips such as cables and ropes. Because these soft strips The object has a certain elasticity, so it often occurs that the hook is detached under the strong springing force of the strip, which leads to a great safety hazard. In the prior art, there is no technology for the lower part to control the locking of the upper end of the ladder, so it is necessary to improve on this technique

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