JPS621000Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an outrigger device for a mobile crane.

When working on the side in a narrow space (where the outriggers cannot be extended to their maximum extent), the lifting capacity is smaller than when the outriggers are extended to their maximum extent (stability is poor).

Stability is poor when working with outriggers partially extended. To solve this problem, you can improve stability by shifting the vehicle to the side and increasing the distance from the center of gravity of the vehicle to the outrigger float. The stability is about the same as when it is fully extended. In other words, a lifting load equivalent to the maximum overhang can be obtained.

The present invention was developed in view of the above circumstances, and its purpose is to move the frame laterally relative to the outriggers to increase the distance from the center of gravity of the vehicle to the outrigger floats, thereby increasing the lifting load. Our goal is to provide outrigger equipment for mobile cranes that can.

Hereinafter, the present invention will be explained with reference to the drawings. In the drawing, reference numeral 1 denotes a frame of a mobile crane, and brackets 2 are fixed to the lower surface of both ends of the frame 1. The bracket 2 has two guide portions 8 each having an L-shaped cross section on its lower surface.

In the drawing, reference numeral 5 denotes a moving member, and a bed 3 is fixed on the upper surface of the moving member 5, and a guide groove 9 is formed in the bed 3.

The guide portion 8 of the bracket 2 is slidably inserted into the guide groove 9, so that the movable member 5 is movably attached to the bracket 2.

The base of the shift cylinder 4 is attached to the bracket 2 with a pin 10, and the rod 11 of the shift cylinder 4 is attached to the bracket 12 provided on the moving member 5.
It is attached with pin 13.

Brackets 14, 1 are provided at both ends of the moving member 5.
5, 16, and 17 are provided, and the bracket 14 and the bracket 16 are provided with a jack cylinder 6,
6' is swingably mounted.

A bracket 19 at one end of one outrigger 7 is attached to one bracket 15 with a pin, and a bracket 20 of the other outrigger 7' is attached to the other bracket 17 with a pin.

One jack cylinder 6 is attached to a bracket 22 of the other outrigger 7' with a pin, and the other jack cylinder 6' is attached to a bracket 24 of one outrigger 7.

By extending both the jack cylinders 6, 6', both the outriggers 7, 7' are rotated downward, and the outriggers 7, 7' are grounded to perform the lifting operation of the load. By operating the shift cylinder 4 in this state and moving the frame 1 relative to the moving member 5, the frame 1 can be moved laterally relative to the outriggers 7, 7' that are in contact with the ground. This increases the distance from the weight of the vehicle to the outrigger float.

Therefore, as shown in Fig. 3, the lifting load can be increased by the shaded area.

FIG. 3 shows the outriggers 7, 7' in the case of maximum extension at all circumferences, FIG. 4 shows the outriggers 7, 7' in the case of intermediate extension at all circumferences, and FIG.
This is the case of maximum intermediate extension.

The present invention has been described in detail above, and the bracket 2 is fixed on the lower surface of both ends of the frame 1, and two guide portions 8 are provided on the lower surface of the bracket 2, and the guide groove 9 of the movable member 5 is slid into the guide portion 8. A movable member 5 is movably attached to the bracket 2 in contact with the movable member 5, a shift cylinder 4 for moving the movable member 5 is provided on the bracket 2, and outriggers 7, 7' are provided on the movable member 5 so as to be rotatable downward. Since the moving member 5 is provided with the jack cylinders 6, 6' for operating the outriggers 7, 7', the outriggers 7, 7' can be operated easily.
By operating the shift cylinder 4 with the outriggers 7 and 7' in contact with the
The distance from the center of gravity of the vehicle to the outrigger float can be increased, and the lifting load can be increased.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view of the entire see-through state, FIG. 2 is a perspective view of the disassembled and assembled state, and FIGS. 1 is a frame, 4 is a shift cylinder, 5 is a moving member, 6 and 6' are jack cylinders, and 7 and 7' are outriggers.

Claims (1)

[Scope of utility model registration request] A bracket 2 is fixed to the lower surface of both ends of the frame 1, and two guide portions 8 are provided on the lower surface of the bracket 2, and the guide groove 9 of the moving member 5 is provided in the guide portion 8.
The movable member 5 is movably attached to the bracket 2 by slidingly contacting the movable member 5, and the shift cylinder 4 for moving the movable member 5 is provided on the bracket 2.
An outrigger device for a mobile crane, characterized in that the outriggers 7, 7' are provided rotatably downward, and the movable member 5 is provided with jack cylinders 6, 6' for operating the outriggers 7, 7'.