JPH045477U

JPH045477U -

Info

Publication number: JPH045477U
Application number: JP4421990U
Authority: JP
Priority date: 1990-04-24
Filing date: 1990-04-24
Publication date: 1992-01-20

Description

[Brief explanation of the drawing]

第１図、第２図は、本考案の伸縮ブームの説明
図であつて、第１図は第一実施例、第２図は第二
実施例を示すものである。第３図は、従来の伸縮
ブームの縦断面説明図、第４図は、第３図のＡ−
Ａ断面図である。外側ブームセクシヨン……１、内側ブームセク
シヨン……２、基端部スライド部材……３，３、
先端部スライド部材……４，４。 1 and 2 are explanatory diagrams of the telescopic boom of the present invention, with FIG. 1 showing the first embodiment and FIG. 2 showing the second embodiment. FIG. 3 is a vertical cross-sectional explanatory diagram of a conventional telescopic boom, and FIG. 4 is a
It is an A sectional view. Outer boom section...1, Inner boom section...2, Base end slide member...3,3,
Tip slide member...4,4.

Claims

[Scope of utility model registration request]

It is a telescopic boom in which an inner boom section 2 is telescopically inserted into an outer boom section 1, and in particular, the inner boom section 2 is moved in the longitudinal direction to the left and right positions above the base end of the inner boom section 2. A pair of left and right proximal slide members 3, 3 which are permanently attached and whose sliding surfaces slide into contact with the upper inner surface of the outer boom section 1, and a pair of left and right proximal slide members 3, 3, which are permanently attached and whose sliding surfaces are in sliding contact with the upper inner surface of the outer boom section 1, and a pair of base end slide members 3, 3 of the outer boom section 1 at left and right positions below the tip of the outer boom section 1. A pair of left and right distal end slide members 4, 4 which are mounted so as not to be movable in the longitudinal direction and whose sliding surfaces slide into contact with the lower outer surface of the inner boom section 2, wherein the pair of left and right proximal end slide members 3 are provided. , 3 are each provided with a sliding surface that comes into sliding contact with the corresponding left or right corner of the upper inner surface of the outer boom section 1, and a pair of left and right base end slide members 3, 3.
Connect the proximal end of the inner boom section 2 to the upper left and right positions of the left or right slide member 3,3.
The left or right slide members 3, 3 are configured to be displaced leftward or rightward on the base end of the inner boom section 2 when a downward force is applied from the outer boom section 1 to the boom section 1. A telescopic boom featuring