JPS623017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger device for a crane vehicle, and particularly to an outrigger device in which the amount of protrusion of an outrigger inner cylinder is made as large as possible.

To explain the conventional outrigger device based on FIG. 1, an outrigger inner cylinder 0 is placed inside an outrigger outer cylinder
3 are slidably fitted, and when the outrigger inner cylinders are retracted, the base ends of the left and right outrigger inner cylinders will interfere, so a certain clearance S is required.
Furthermore, since a minimum wrap distance l is required for contact with the outrigger outer cylinder when extending, there is a drawback that the extending stroke cannot be made very large.

In addition, there are cases where the left and right outrigger outer cylinders are separate, but although the extension stroke can be increased, the installation space is also large, making it impossible to install in small cars, and furthermore, the number of parts increases. .

The present invention has been made in view of the above drawbacks.
A part of the proximal end of the outrigger inner cylinder, which is slidably inserted into the outrigger outer cylinder, is cut out so that the rear end overlaps the opposing outrigger inner cylinder notch over a certain length across the center line. The outrigger inner cylinder can be formed to be long, and the required minimum lap allowance can be secured while at the same time, the extension stroke can be made large.

Embodiments of the present invention will be described below based on the drawings. Reference numeral 1 is a frame of a traveling body on which a crane is mounted, and between a loading box (not shown) mounted on the frame 1 and a driver's seat, Outrigger outer cylinder 2 is fixed. An outrigger inner cylinder 3 is slidably fitted into the outrigger outer cylinder 2, and a jacking device 4 is fixed to the tip of the outrigger inner cylinder 3. In this embodiment, the outrigger inner cylinder 3 is manually extended or retracted.

By the way, a notch 5 is formed in a part of the base end of the outrigger inner cylinder 3, and when the outrigger inner cylinder 3 is stored, the notch 5 formed at the base end of the outrigger inner cylinder 3 overlaps with the other notch. The rear end extends beyond the centerline.

Reference numerals 6 and 7 refer to guide and support rollers for the outrigger inner cylinder 3, which are installed at the tip and intermediate positions of the outrigger outer cylinder 2, and guide the outrigger inner cylinder 3 when it is extended. In addition, a stopper 8 is provided at the top of the tip of the outrigger outer cylinder 2, and the stopper 8 is connected to holes 9, 9' bored in the upper surface of the outrigger inner cylinder 3.
The outrigger inner cylinder 3 is configured to be able to engage with the outrigger inner cylinder 3, and is fixed in each position when the outrigger inner cylinder 3 is retracted and when it is extended.

Therefore, when extending the outrigger device during crane work, after pulling out the stopper 8 from the hole 9, the operator pulls out the outrigger inner cylinder 3 outward to its stroke end, and then inserts the stopper 8 into the hole 9'.
, and the jacking device 5 is extended.
In this case, in the present invention, since the outrigger inner cylinder can be formed larger by the length exceeding the center line than in the conventional outrigger device, the portion corresponding to the exceeded length can be formed with a minimum overlap with the outrigger outer cylinder. It can be used for a part of the outrigger inner cylinder, and the extension stroke of the outrigger inner cylinder can be made as large as possible. In other words, stability during crane work can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially sectional side view of the prior art; FIGS. 2 a, b, and c show the outrigger device of the present invention; a is a partially sectional side view; b is a cross-sectional view taken from line B-B of a, c is a
FIG. 3 is a sectional view taken along the line c-c of FIG. 3, and FIG. 3 is a perspective view of the base of the outrigger inner cylinder. 2... Outrigger outer cylinder, 3... Outrigger inner cylinder, 5... Overlapping part.

Claims (1)

[Claims] 1 Consists of an outrigger outer cylinder fixed on the vehicle frame, and an outrigger inner cylinder fitted into the outrigger outer cylinder so as to be slidable left and right, respectively, and the bases of the pair of outrigger inner cylinders are inserted into the outrigger outer cylinder in the longitudinal direction and A notch is formed by cutting a predetermined length in the left and right direction, and when the outrigger inner cylinders are stored, the base ends of each outrigger inner cylinder are positioned in the notches of the opposing outrigger inner cylinders across the center line, and are kept constant with each other. An outrigger device for a crane vehicle that is characterized by polymerization over its length.