Separable spiral pipe

Abstract

A separable spiral pipe is a modular vertical lifting unit comprising a combined steel strip, support wheels, a cylinder, a strip-pressing mechanism and the like. The combined steel strip from a strip storage reel is forced by a strip-pressing structure to twist and deform; accordingly, an upper groove of the lower portion of the combined steel strip is continuously inserted into the lower edge of the upper portion of the combined steel strip which just forms a spiral pipe, the steel strip continuously combines itself to achieve ascending motion of the spiral pipe, and the form can be a right-hand spiral pipe or a left-hand spiral pipe. The separable spiral pipe has the advantages that the height of the separable spiral pipe is small, a motion principle of the separable spiral pipe is simple, the moving process of the separable spiral pipe is reliable, and the separable spiral pipe is applicable to standard batch production and applicable to modular setup of various stage lifting tables.

Description

technical field [0001] The invention relates to a mechanical vertical lifting device, which is driven by an external power such as a motor for lifting and lowering with load. Background technique [0002] Through patent retrieval, we can know that there are similar patents such as US2173685A, CN1037126A, CN1093335A, etc., which will be analyzed one by one as follows: [0003] The 1939 patent (US2173685A) discloses a lifting device: "It consists of a continuous or endless metal belt which can be wound into a helix; two members, namely the rotor and the stator, are arranged concentrically so that the An annular space is reserved between them; a guide rail for the above-mentioned metal strip to spiral up in the above-mentioned annular space; there is a slit in the outer member of the above-mentioned two concentric members, and the metal strip can pass through the slit Through the above track; the tool for the metal belt to engage the inner layer of the two concentric component...

AI Technical Summary

Problems solved by technology

"After analysis, it can be seen that this lifting device has the following disadvantages: (1) a large number of pins 7 and holes 6 in the steel belt 5 have many problems in the principle of motion of "pins inserted into the holes for positioning", which cannot be implemented in engineering

First, it is not possible to machine such a number of precisely fitting holes and pins

Since all holes 6 and pins 7 are on the same rigid belt 5, the simplest processing technology of "matching" cannot be adopted; in the era of 1939, there was no digital processing equipment (photoelectric encoder, PLC, automatic control system) It did not appear until after 1970), relying on purely manual processing cannot guarantee that about 500 (in fact, there may be more) pins 7 on a steel belt 5 must be accurately inserted into the same number of holes 6

As long as any pin 7 is not inserted into the hole 6, the steel strip 5 will not be able to pass through the spiral space smoothly and be destroyed

Secondly, the operation process is not reliable

With today's digital precision machining equipment such as machining centers, even if the pin 7 and the hole 6 that meet the requirements of use are processed, the pin 7 will always bear a huge vertical shear force after forming (see US2173685A Figure 4 ) and bend downwards and are prone to plastic deformation (the principle of equipment movement is such that it cannot be changed). After a certain number of movements, those pins 7 with larger deformation will not be able to ensure subsequent accurate insertion into the hole 6 and fail

(2) The movement process of the circulating chain 9 and the tapered roller 10 interferes with each other, and the envisaged movement cannot be realized in the project

Its disadvantage is that it is expensive, and the horizontal steel belt with upper and lower grooves cannot be produced domestically.

[0005] The patent (CN1093335A) is used for the loading and unloading system of articles, which is not comparable due to different industries

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