JPS62147685U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of one embodiment of the present invention (cross-sectional view of Fig. 3), Fig. 2 is a side view of the main parts thereof,
Figures 3 and 4 are a side view and a plan view of the entire truck crane, respectively, Figure 5 is a vertical cross-sectional front view of the main parts for explaining the operation, and Figure 6 is a vertical cross-section of another embodiment corresponding to Figure 1. It is a front view. 9...Vehicle body, 10...Swivel base, 12...Boom elevation cylinder, 13...Jib, 19...Engine cover.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A means for freely rotating the swivel platform by attaching it to the center of the rear of the vehicle body, with a crane operator's cabin adjacent to one side of the base end support of a boom that can be raised and lowered. In a truck crane, a motor vehicle cab is installed on one side of the front end of the vehicle body so as not to interfere with the boom at the rest position, and a boom rest 2 is installed on the vehicle body behind the vehicle cab 1 and corresponds thereto. Male and female shaped engagement parts 4 and 5, which can be vertically separated and are engaged in the boom's rest position, are installed between the lower surface of the boom 3 and the boom, which is biased towards the crane operator's cab 6 side, from the shape engagement parts. A guide piece 7 is attached to the lower side, and the guide piece engages in rolling or sliding engagement with an inclined rail 8 so as to guide the boom from a higher position to a rest position without interfering with the automobile driver's cab 1. protrudes upward from the top of the boom rest 2 towards the crane operator's cab, and the male and female shaped engaging parts 4 and 5 are arranged so that they separate and engage when the boom moves up and down along the inclined rail. A boom guiding device to a rest position, characterized in that a taper is set. (2) The female engagement part is constructed of an angle iron beam 4 whose both ends are fixedly supported by the boom and parallel to the boom axis, and the male engagement part is formed by a truncated conical protrusion 5 in the center. 1. A boom guiding device to a rest position according to claim (1) of the registered utility model, in which a shape engaging portion is fitted.