Hoisting and lowering driving engagement multi-row chain

Abstract

Aspects of the invention provide a hoisting and lowering driving engagement multi-row chain in which the weight of the chain is balanced across the chain width direction so as to improve the load balance. This allows the weight of articles to be hoisted and lowered more stably hoisted and at higher positions, and results in an improvement of endurance of the chain, reduction of driving noise, miniaturization of the chain size, while the biasing or deflecting of intermediate tooth plates and inner tooth plates in the chain width direction is suppressed.

Description

technical field [0001] The present invention relates to a lifting device that is used in manufacturing equipment in various manufacturing fields, transportation equipment in the transportation field, nursing equipment in the medical and welfare field, and stage equipment in the art field to move the lifting table in parallel with respect to the installation surface. Intermeshed multi-row chain for lift drive. Background technique [0002] Conventionally, as a lifting device, there is a lifting device that uses a so-called chuck chain that engages with each other to move up and down an object to be lifted such as a heavy object (see Patent Document 1). [0003] Also, as such meshing chains, such as Figure 8 As shown, the following multi-row meshing chain 500 is designed, that is, a pair of front and rear bushings 520 are pressed and fitted on a pair of left and right inner chain plates 510 to form an inner link unit 530, and the inner link unit 530 is formed along the chain ...

AI Technical Summary

Problems solved by technology

[0006] However, in the existing multi-row engagement chain 500, as Figure 8 As shown, the hooks 511, 541, 551 respectively formed on the inner link plate 510, the middle link plate 540 and the outer link plate 550 face the same length direction of the link plates and extend towards the same link plate height direction state, to respectively configure the inner chain plate 510, the middle chain plate 540 and the outer chain plate 550, the result is as follows Figure 9 As shown, since the arrangement order of the shear plane X and the fracture surface Y in each chain plate along the thickness direction of the chain plate is the same for all the chain plates, it is the same arrangement order, so the lighter fracture surface Y side and the weight A weight difference occurs between the heavy shear plane X sides, and the weight balance of the entire chain in the direction of the thickness of the chain plate, that is, in the direction of the entire chain width, is biased, and the weight balance is biased so that the meshing chain 500 is driven upward. When the load balance in the chain width direction is deteriorated relative to the weight of the object to be lifted, the durability of the chain is reduced or the problem of driving noise occurs.

[0007] In addition, especially when the meshing chain 500 is extended in the chain length direction and the lifting height of the object to be lifted is set high, the meshing chain 500 at the time of the lifting drive will be affected by the deterioration of the load balance of the meshing chain 500 described above. Tilting in a certain direction, so there will be a problem that the inner link plates 510, the middle link plates 540 and the outer link plates 550 of a pair of meshing chains 500 are disengaged from each other, resulting in a bending problem.

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