JPH0128196Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in horizontal distributors.

An example of a horizontal distributor formed by connecting articulated booms with a vertical pivot is the first
This is as shown in the front view and plan view of FIG.

In the figure, 1 is a multi-joint boom for running a concrete pressure pipe along, and this is made by connecting the end faces of a mounting frame 2, an intermediate boom 3, . . . a tip boom 4 with vertical pipe parts 5, . It has a joint structure that can be folded in the horizontal plane.

In the illustrated example, the number of intermediate booms 3 is three, but the number may be increased or decreased depending on circumstances such as the distance to the placing position. In the figure, 11 indicates the concrete pressure pipe from the pump, which is attached to each boom 3, 4 with a fitting 1.
2, . . . , and in the case of a pivot connection between booms, it is inserted into the vertical tube portion 5 via swivel joints 13, .

A gondola 14 and an operation panel 15 are attached to the tip boom 4, and when an operator riding the gondola 14 operates the operation panel 15, it can be rotated to a desired position while looking down on the casting site from a close distance. , can be moved forward and backward.

The mounting frame 2 is attached to a column (S construction, SRC construction, RC construction,
It has a mounting plate part 19 that is in close contact with the temporary shelf pile, main pile, etc.
By fastening 6, it is firmly attached to the pillar 18.

A base undulating member 20 is horizontally supported at the tip of the tip boom 4, and a tip undulating member 21 is horizontally supported at the tip of the base undulating member 20. A flexible hose 2 connected to the concrete pressure pipe 11 at the undulating part
2 are assembled and arranged.

However, in this case, the articulated boom 1 is deflected due to its own weight and the weight of the concrete, and especially when the boom is made of a high-tensile material, the bending stress due to the bending moment can be kept high, but the long When it comes to shaku, the drop due to the bending of the tip increases.

This is dealt with by raising the mounting position of the main body in advance by the amount of the deflection M, as shown in FIG.

However, with this method, out of the allowable mounting height,
Approximately 30cm to 40cm would be wasted, which could be a problem in buildings with floor height restrictions.

In view of the above-mentioned circumstances, this project was designed to improve the deflection of the boom caused by the horizontal distributed distributor's own weight and the weight of concrete.
The gist of this is that the pivot joint of each boom that is assembled from the base boom to the other side is made perpendicular to the bracket, but the first boom that is assembled to this is given a predetermined upward slope. The reason is that each pivot connection part is given a reverse warp in advance to correspond to the bending, so that it can be in a nearly horizontal state when in use, so it can be used in buildings with floor height restrictions. .

This will be explained in detail below based on the drawings.

Figures 4a, b, and c show the boom 3b that is assembled from the boom 3a on the base side to the tip of the base boom 3a in this case.
A schematic view, an enlarged detailed view, and an overall view of the articulated boom are shown respectively, and as clearly shown in Figure a,
In this case, the vertical pipe section 5 attached to the bracket at the tip of the boom 3a on the base side is vertical, but the boom 3b attached thereto is fixed to a predetermined position by vertically deflecting the boss 30, etc. An upward inclination angle θ is given.

The degree is set so that the cumulative amount of warpage of each pivot joint is equal to the amount of deflection during use.

As shown in Figure c, the articulated boom 1' in the present invention is warped upward at the tip before concrete is poured, but when the weight of concrete is loaded during concrete pouring, the tip of the articulated boom 1' There will be no difference in the descent between the lower part and the root part.

In addition, in this case, since the pivot shaft is vertical, the front boom maintains the same upward inclination regardless of its rotation angle, and the tip and base portions remain the same regardless of the direction of bending or stretching. The difference in the drop of will disappear.

Therefore, according to this proposal, restrictions on installation height can be relaxed, making it possible to accommodate buildings with smaller floor heights and buildings with many obstacles.
The following effects are achieved.

(1) When the boom was fully extended in a place with narrow vertical spacing, conventional equipment could not perform concrete work because it would bend under its own weight, but this does not happen with the proposed system.

(2) It is difficult to work if the tip is bent and the operation panel or workbench attached to the tip boom leans forward, but it becomes easier to work if it is in a nearly horizontal position.

[Brief explanation of the drawing]

Figures 1 and 2 are front and plan views showing an example of a horizontal distributor, Figure 3 is an explanatory diagram of how to deal with tip deflection in a conventional device, Figure 4 a,
b and c are a schematic diagram, an enlarged detailed diagram, and an overall diagram of the proposed configuration. 3...middle boom, 3a...boom, 3b...
Front boom, θ...Inclination angle, M...Deflection.

Claims (1)

[Scope of utility model registration request] A horizontal distributor consisting of articulated booms connected by a vertical pivot, in which the pivot joint of each boom is assembled from the base boom to the front, and the pivot shaft is perpendicular to the bracket. A horizontal distribution system characterized in that the front boom to be assembled to this is tilted upward, and each pivot connection part is given a reverse warp corresponding to the deflection in advance, so that it is in a substantially horizontal state when in use. Viewer.