JPS6125379U

JPS6125379U - lifting chain

Info

Publication number: JPS6125379U
Application number: JP10991084U
Authority: JP
Inventors: 稔長塚
Original assignee: 日本電気株式会社
Priority date: 1984-07-20
Filing date: 1984-07-20
Publication date: 1986-02-15

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図に玉掛金具として常時開いた口を有するフックを
用いた吊土用鎖の従来の形を示し、１は常時開いたフッ
クの口である。第２図は第１図の吊土用鎖に用いられるフックの深さを
説明した図で、１がフックの深さを示す。第３図は吊上装置の操作と玉掛けを１人で行なうため、
第１図の吊土用鎖を改良したもので一般に用いられてい
るものの形状を示す。第４図は本考案による吊土用鎖の無負荷の状態を示し、
１は鎖の周囲につけたコイルスプリングで、コイルスプ
リングの両端は鎖の適当な所に固定されている。２はコイルスプリングの周囲にかぶせた伸縮チューブで
、軟質プラスチック製の蛇腹または布でできている。第４図に於いて、鎖はスプリングの復元力により縮んで
いる。第５図は第４図の吊土用鎖に負荷か加わって鎖が伸びた
状態を示す。FIG. 1 shows a conventional hanging chain that uses a hook with a normally open mouth as a sling fitting, and 1 is the mouth of the hook that is always open. FIG. 2 is a diagram illustrating the depth of the hook used in the hoisting chain shown in FIG. 1, where 1 indicates the depth of the hook. Figure 3 shows a single person operating the lifting device and slinging.
This figure shows the shape of a commonly used suspension chain that is an improved version of the suspension chain shown in Figure 1. Figure 4 shows the unloaded state of the hanging earth chain according to the present invention.
1 is a coil spring attached around the chain, and both ends of the coil spring are fixed to appropriate locations on the chain. 2 is a telescopic tube that is placed around the coil spring, and is made of a soft plastic bellows or cloth. In FIG. 4, the chain is compressed by the restoring force of the spring. FIG. 5 shows the suspension chain shown in FIG. 4 in a state where the chain is stretched by a load.

Claims

[Scope of utility model registration request]

In a lifting chain used for lifting equipment such as a crane, the chain is passed through a coil spring, and a soft plastic bellows or bellows of an appropriate length with an inner diameter slightly larger than the outer diameter of the coil spring is attached to the outside of the coil spring. A suspended earthwork characterized by covering a coil spring such as cloth with a tube that expands and contracts according to the movement of the coil spring, and fixing both ends of the coil spring to appropriate parts of a chain so that the coil spring and the tube are fixed to each other at least at both ends. Chain for use.