Insulating ladder for live working

Abstract

The invention relates to an insulating ladder for live working. The insulating ladder comprises two pulley brackets and a pulley hook, wherein each pulley bracket comprises a front rod, a rear rod, aninclined rod for connecting the front rod and the rear rod, and a first pulley mechanism; the first pulley mechanism comprises a cable pulley located between the front rod and the rear rod, a first bearing arranged on a cable pulley shaft and a first bearing mounting structure; the first bearing mounting structure comprises first bearing containing cavities formed in the front rod and the rear rod, and first compressed springs arranged in the first bearing containing cavities; first guide seams for a cable pulley shaft to penetrate are arranged at the left and right sides of the first bearingcontaining cavities; a first rotation stopping groove is formed in the upper part of one first guide seam; a first rotation stopping part, which is matched with the first rotation stopping groove, isarranged at a position, corresponding to the first rotation stopping groove, of a pull rope pulley shaft. The insulating ladder for the live working, provided by the invention, has the beneficial effects that the cable pulley lapped on the cable stops rotating when a worker climbs through a soft ladder, and the position of a ladder head is fixed so that the worker can work conveniently.

Description

technical field [0001] The invention belongs to the field of electric equipment, in particular to an insulating ladder for live work. Background technique [0002] Chinese patent document ZL201320806144.7 discloses an insulating ladder for live work, including a ladder head and a soft ladder. The two ends of the fixed cross bar, the movable cross bar is located under the fixed cross bar, the two ends of the fixed cross bar are set on two pulley brackets respectively, the movable cross bar is connected with the fixed cross bar through a spring, and the pulley hook is located on the fixed cross bar. Above, one end of the stay rope is fixed in the center of the movable crossbar, and the other end of the stay rope passes through the fixed crossbar and the pulley hook in sequence, and the stay rope can drive the movable crossbar to move. The top of the pulley bracket is provided with a cable pulley, and the bottom of the cable pulley is provided with a self-locking part. The lo...

AI Technical Summary

Problems solved by technology

[0005] Second, after the ladder head is hung on the cable, in the process of climbing on the net, the slope generated by the sagging of the cable itself and the movement during the climbing process will cause the ladder head to move on the cable, which will not only deviate from the desired position, and greatly increased the risk of the staff during the climbing process. After the cable is hung on the ladder head, since the pulleys are all in contact with the cable, it is very easy to slide on the cable, causing the ladder head to be unstable and unable to work normally. Operation

[0006] Third, the process of hanging the ladder head on the cable is very difficult. The reason is that in actual operation, it is very difficult to fix the pull rope just in the middle of the movable cross bar, which makes the ladder head easy to tilt left and right. In the absence of a suitable fixed structure in the front and rear directions, the ladder head is prone to pitching and swinging. During the lifting process, the ladder head will rotate under the action of the torque release of the pull rope itself, resulting in the ladder head not being able to rise to the expected position at all. At the cable, even if you are lucky enough to reach the bottom of the cable, but because the connecting rod above the cable pulley is set horizontally, the result is that the connecting rod withstands the cable and cannot continue to rise

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