JPS5929030Y2 - Boom rest of traveling crane - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a boom rest for a traveling crane.

What is shown in FIG. 1 is a theory of the running state of a conventional traveling crane.
is mounted, and the base end of the boom 30 is pivotally attached to this swivel base 2.
A hoisting cylinder 4 for supporting and controlling the hoisting of the boom 3 is disposed between an intermediate position of the boom 3 and the swivel base 2,
The boom 3, which has been brought into a near-horizontal state by reducing the undulating cylinder 4, is supported by a boom rest 6 provided on a deck 5 of the traveling vehicle 1.
0 If this boom rest 6 is not available, the luffing cylinder 4
When the boom 3 swings up and down due to sudden braking or unevenness of the road surface when traveling with the boom 3 in a near-horizontal state, the end face of the cylinder tube forming the undulating cylinder 4 A problem arises in that the piston portions of the piston rods collide and damage the undulation cylinder 4.

Although the boom rest 6 solves this problem, since it is installed on the deck 5, when the boom 3 is raised and rotated, the tip of the boom 3 is damaged. Problems such as accidentally colliding the boom rest with the hanging tool 1 suspended by force, damaging the boom rest,
When the swivel base 2 was rotated with the boom 3 in a laid down state, there was a problem in which the boom collided with this boom rest.

The present invention provides a new boom rest for a traveling crane that completely eliminates these problems.The problem is solved by installing the boom rest, which was conventionally installed on the deck 5, on the swivel base. It is something.

Next, one embodiment of the configuration of the present invention will be described based on FIG.

8Vi, the boom auxiliary part provided in front of the pivot 10 part of the boom 3, and the part that protrudes laterally on the lower surface of the boom 2, is the part that protrudes laterally when the hoisting cylinder 4 is contracted and the boom 3 is in the laid down state. , is placed on a boom rest 9 provided on the swivel base 2.

Therefore, the zero downward force acting on the boom 3 due to sudden braking or unevenness of the road surface during driving is reduced by this boom rest 9.
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In summary, the present invention has a rotating platform mounted on a traveling vehicle so as to be able to rotate freely, the base end of a boom being pivotally supported on the rotating platform, and the boom being raised and lowered between an intermediate position of the boom and the rotating platform. In the mobile crane, a boom rest is provided on the swivel base, and the boom rest supports the boom in a laid down state, so that the boom rest rotates together with the boom. This has the effect of completely eliminating the problem of the boom rest being damaged by the lifting tool I as a result of movement.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional traveling type engine, and FIG. 2 is an explanatory diagram for explaining the present invention. 1... Traveling vehicle, 2... Turning platform, 3...
...Boom, 10... Pivot, 4...
Lifting cylinder, 9...Boom rest.

Claims (1)

[Scope of utility model registration request] A slewing base is mounted on a traveling vehicle so as to be freely swivelable, the base end of the boom is pivotally supported on the swivel base, and a hoisting cylinder for controlling the boom to raise and lower is arranged between a suitable intermediate position of the boom and the swivel base. 1. A boom rest for a traveling crane, characterized in that a boom rest is disposed on the swivel base, and the boom rest supports a boom in a laid down state.