Lifting device

Abstract

An elevator comprising an elevator body secured to a building structure and provided with a winder for winding a plurality of suspenders, and an elevating / lowering section being suspended to move freely up and down by the plurality of suspenders led out from the suspender outlet of the elevator body. The elevator further comprises a tension adjuster for substantially equalizing the tensions of respective suspenders by acting on the respective suspenders located between the suspender outlet of the elevator body and the winder. The elevating / lowering section can be moved up and down in a stabilized attitude and safety is enhanced against cutting and dropping of the suspenders.

Description

technical field [0001] The invention relates to a lifting device. Background technique [0002] All along, the lifting device has: a drum. The roller is suspended from the equipment installed in a high place and two or more hanging bodies with independent lifting parts of the equipment, and each hanging body is rolled up, so that the equipment is raised and lowered with the rotation of the drum. For example, in the utility model publication No. 6-28913, a lifting device is described, and the lifting device includes a pair of long-shaped rollers (drum) configured with a driving mechanism, and lighting equipment configured with a differential mechanism, and On one pulley of the differential mechanism, roll the wire-rope of the drum into a U shape, and on the other pulley, roll the drum The wire-rope is rolled into an X shape to control the rotation direction of each drum, so that the lighting equipment can be lifted and rotated. In this type of lifting device, if the struct...

AI Technical Summary

Problems solved by technology

[0007] However, since the bearing fitting recess 41 forming the bearing stand 31 and the sliding bearing part 32 are circular in the axial direction and formed by machining, the fitting part of the bearing stand 31 and the sliding bearing part 32 is curved, so Difficulty in dimensional measurement, and difficulty in dimensional management due to the need for fine dimensional accuracy

[0008] In addition, sliding bearings are cheaper than rotating bearings, but since there is a gap between the shaft and the receiving part and foreign matter such as dust is mixed in, the rotation efficiency is likely to deteriorate, so sliding bearings cannot be used in harsh environments where dust is diffused in the air.

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