JPS60132898A - Guide apparatus for multistage boom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] In the multi-stage boom, pads are arranged on the front lower inner surface of the outer boom and the rear upper outer surface of the inner boom, and at the same time support the inner boom with respect to the outer boom.
This ensures smooth sliding.

Incidentally, in the multi-stage boom, the boom may be eccentric in the left-right direction due to manufacturing tolerances or assembly errors of each boom, which may cause wobbling in the sliding movement of the boom.

The present invention has been made in view of the above-mentioned points, and includes a pair of pads arranged at the rear of the inward direction boom, which restrict the movement of the front and rear walls and which are inclined to widen toward the end. The present invention provides a multi-stage boom extension/retraction device that has a slidable guide section and a pad that can be adjusted in the lateral direction, resulting in less backlash.

To explain the present invention in detail below, 1 is a multi-stage boom, which includes a base boom 2, an intermediate boom 6 slidably inserted into the base boom 2, and a base boom 6 that is slidably inserted into the base boom 2. The tip boom 4 is slidably inserted into the boom 4, and is configured to be compressed by a telescoping device (not shown).

A6 And among the adjacent booms, the outer boom, that is, the base boom 2 or the tip boom 4 with respect to the intermediate boom 6.
On the other hand, a front pad 5.6 is fixed on the front lower inner surface of each intermediate boom 6, and a rear pad 5.6 is fixed on the rear upper outer surface of each intermediate boom 6.
, door, 8 are provided.

After this, the pad 7.8 can be moved laterally by means of an adjustment member 9.10.

For example, the rear pad 7 will be explained with reference to FIG.
Rear panel, door is left power door R, + and right panel, door R
and their bads 7L and 7R are:
The front and rear directions '41@ are regulated by stoppers 11 and 12, and the outer ends of the pads 7L and 7B are
A plane 7 parallel to the inner surface of the side wall of the base boom 2 which is the outward direction boom
In addition to being formed in the shape of a, the inner end is formed in inclined surfaces 7b, 7b, which are inclined in a shape that widens toward the front.

On the other hand, on the upper surface of the intermediate pool 3, an adjustment part 9 with sliding holes in the front and back direction is arranged, and at the rear thereof, the inside of the pad door L, 7R is ftI! The inclined surface 7b formed on the I cat 6,'
A trapezoidal guide portion 16 that comes into contact with 7b is fixed.

Therefore, after loosening the bolt 14 that secures the adjustment member 9 to the Nakaichikawa boom 6, if the rear pads 7L and 7R are pushed backward along the guide 15, the rear pads 7L and 7R are moved to the stopper 11.12.
It can move to both the left and right sides while being supported by the base boom 2, and can come into contact with the inner surface of the side wall of the base boom 2.

Note that 16 is a long hole formed in the front part of the adjustment member 9, and serves to guide the bolt 14.

Further, the same applies to the rear part of the tip end pool 4.

Next, to explain the operation of the present invention, the stopper 1
After inserting the inner boom into the outer boom with the pads 7L, 7R and the key 411 member 9 disposed between 'I, 1:,', the inner boom is slightly extended.

Next, when the bolt 14 is loosened and the adjustment member 9 is pressed backward, the outer ends 7m and 7a of the pads 7L and 7B on the left and right move toward the inner surface of the outer boom side wall, and the distance between them is corrected. At the same time, the inner boom can be positioned substantially on the centerline with respect to the outer boom.

If you conclude Pol) 14 after finishing, it will be bad 7L.

The relative position of 7R to the outward boom will be maintained.

As described above, in the present invention, the pair of pads can be moved laterally through the adjusting member, and the relative positional relationship can be adjusted even if manufacturing tolerances or assembly managers are not satisfied. It becomes possible to make corrections, and smooth extension and contraction of the boom can be performed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view schematically showing a multi-boom, and FIG. 2 is a plan view showing an enlarged main part. 1...Multi-boom, 7.8...Back bad, 9.
... Adjustment □ member, 16... Guide part. Applicant: ShinMaywa Kogyo 1′ company

Claims (1)

[Claims] In a multistage boom in which one or more intermediate booms and tip booms are slidably inserted in sequence into a base boom, on the rear left and right sides of the inner boom between the adjacent booms,
A pair of pads are provided that are restricted from moving in the front-rear direction and are inclined to widen toward the front, and an adjustment member that is provided with a guide portion that comes into contact with the slope portion formed on each pad is slidably provided. A guide device for a multistage boom, characterized in that each pad is configured to be movable in the lateral direction by the adjustment member.