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Chemical resistant polypropylene ladder

A polypropylene, drug-resistant technology, used in ladders, buildings, building structures, etc., can solve problems such as corrosion and deterioration of ladders, difficult ladders, and loose ladders.

Active Publication Date: 2015-09-23
MIYAMA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, although the fiber-reinforced plastic synthetic resin ladder of the above-mentioned conventional example is excellent in corrosion resistance to gases other than hydrogen sulfide gas or other chemical gases, etc., if it is used in a place where the above-mentioned hydrogen sulfide gas or other chemical gases, etc. stagnate, The ladder may be corroded and deteriorated
On the other hand, although the ladder made of polypropylene synthetic resin of the conventional example has superior corrosion resistance to gases such as hydrogen sulfide gas or other chemical gases compared with the above-mentioned ladder made of fiber-reinforced plastic synthetic resin, as the temperature rises, the rungs The polypropylene coated on the top softens, and the ladder becomes loose and deteriorated, making it difficult to call it a safe ladder

Method used

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  • Chemical resistant polypropylene ladder
  • Chemical resistant polypropylene ladder
  • Chemical resistant polypropylene ladder

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Figure 1 to Figure 4 Concerning an embodiment of the present invention, figure 1 It is a partial cross-sectional front view of the main part of the ladder made of chemical-resistant polypropylene, figure 2 yes figure 1 A three-dimensional explanatory diagram of Part A of image 3 yes figure 1 The explanatory diagram of the rungs, Figure 4 will be figure 1 Illustrative drawing of side members and crosspieces for assembly.

[0034] exist Figure 1 to Figure 4 Among them, the chemical-resistant polypropylene ladder is configured by disposing side beams 1, 1 and a plurality of stepping rungs 2, 2 ... between them, and is especially suitable for maintenance where hydrogen sulfide gas is easily generated. A ladder used for ascending and descending in a hole or a clean tank where chemical gas is likely to be generated.

[0035] Each of the side beams 1 is made of polypropylene resin in a cylindrical shape to maintain strength while reducing deterioration of the side...

Embodiment 2

[0047] The reflector 4 made of polycarbonate is interposed between the polypropylene resin end surface of the crosspiece 2 of the first embodiment and the side beam 1 , and the reflector 4 is embedded in the sealing cover 3 . In addition, other structures are substantially the same as those of the first embodiment.

[0048] In this way, the reflector 4 is interposed between the crosspiece 2 and the side beam 1. Therefore, it becomes a suitable ladder as a guide when going up and down in a usually dark inspection hatch used in a sewer system where hydrogen sulfide gas is easily generated.

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Abstract

The invention provides a ladder made of polypropylene synthetic resin and adopting reinforced crosspieces, which replaces a ladder made of fiber reinforced plastic synthetic resin. The drug tolerant ladder made of polypropylene has the characteristics of deterioration prevention even after a long-time use and safety use. The synthetic resin ladder is formed by two side beams (1) and multiple crosspieces (2) as pedals. The side beams which are made of polypropylene resin are cylindrical. Each crosspiece is formed by covering the periphery of a reinforced metal tube (21) with polypropylene resin. Each crosspiece is connected with the side beams through sealing covers (3) wrapped on the two end parts of the metal tubes.

Description

technical field [0001] The present invention relates to a synthetic resin ladder configured by arranging side beams and a plurality of stepping rungs between the side beams, and more particularly to a chemical-resistant synthetic resin ladder. Background technique [0002] Conventionally, there is known a ladder made of fiber-reinforced plastic synthetic resin, which includes rectangular cylindrical side beams and a plurality of hollow cylindrical stepping rungs arranged between the side beams (for example, refer to Patent Document 1). [0003] On the other hand, there is also known a polypropylene synthetic resin ladder configured by arranging two beams and a plurality of stepping rungs arranged between the two beams (for example, see Patent Document 2 or Patent Document 3). [0004] patent documents [0005] Patent Document 1: Japanese Patent No. 2764568 [0006] Patent Document 2: Japanese Publication No. 50-21 [0007] Patent Document 3: Japanese Patent No. 3955068 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E06C1/02E06C1/08E06C7/00E06C7/08E06C7/48E06C7/50
Inventor 高桥英三
Owner MIYAMA IND CORP