JP3965609B2 - Outriggers such as construction machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outrigger for a construction machine or the like that is installed in a concrete pump truck, a truck crane or the like and used for stabilization during work.
[0002]
[Prior art]
As an example, in the case of a concrete pump car, as schematically shown in FIG. 2, the end of the concrete pipe 2 supported along the multistage boom 1 is made to face the high place by the boom 1. In a concrete pump car designed to place concrete at a place, left and right outriggers 4 are mounted on the front and rear of the vehicle body 3, and during the concrete placement, the outriggers 4 are projected to the left and right, and the pedestal 5 is The vehicle body 3 is lifted and lowered to maintain stability.
[0003]
Conventionally, as shown in FIG. 3, the outrigger 4 has a support shaft 6 erected on a support frame 6 fixed on the vehicle body 3 side, and a base of a main arm 8 having a rectangular tube shape is provided on the support shaft 7. An end portion is rotatably attached in the horizontal direction, and an opening leg cylinder 10 disposed in the horizontal direction is interposed between the main arm 8 and a required position of the support frame 6, so that the opening leg cylinder 10 is provided. The main arm 8 is displaced in the horizontal direction with the support shaft 7 as a fulcrum by the expansion / contraction operation, and the slide cylinder 11 having a rectangular tube shape is built in the main arm 8 to expand / contract. The upper end of the outer cylinder 12 that is arranged in the vertical direction as a rectangular tube at the front end of the slide arm 9 is made to be higher than the upper surface level of the slide arm 9. Make sure it protrudes slightly upward. In addition, a rectangular cylinder-shaped inner cylinder 13 is slidably inserted in the outer cylinder 12 and a vertical cylinder 14 is accommodated in the inner cylinder 13 so that the head cylinder side of the vertical cylinder 14 The upper end portion is attached to the upper end portion of the outer cylinder 12 with a pin 15, and the lower end portion on the rod side of the vertical cylinder 14 is connected to the lower end portion of the inner cylinder 13 via a spherical shaft joint 16 or the like that holds the pedestal 5. The inner cylinder 13 is moved in and out from the lower end of the outer cylinder 12 by the expansion and contraction operation of the vertical cylinder 14. Reference numeral 17 denotes a reinforcing metal fitting at the tip opening of the main arm 8.
[0004]
[Problems to be solved by the invention]
However, in the case of the conventional outrigger 4, the vertical cylinder 14 is surrounded by a double cylinder of the inner cylinder 13 and the outer cylinder 12 in order to stably receive the lateral load on the vertical cylinder 14. In addition, the upper end portion of the outer cylinder 12 protrudes above the upper surface level of the slide beam 9 so as to raise the hanging point of the vertical cylinder 14, but not only the weight increases, When the slide arm 9 is stored in the main arm 8, as shown by a two-dot chain line, the slide arm 9 can be retracted only to a position where the outer cylinder 12 contacts the front end surface of the main arm 8. This is one of the factors that hinder downsizing the overall length. In order to shorten the total length during storage, it is conceivable to make a notch to receive the outer cylinder 12 at the tip of the main arm 8, but in this case, the strength of the main arm 8 during operation is reduced. In order to ensure, it is necessary to increase the plate thickness of the main arm 8 and the reinforcing bracket 17, which increases the weight.
[0005]
Therefore, the present invention is intended to stably support a lateral load acting on a vertical cylinder and to reduce the weight.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides an upper end on the head side of a vertical cylinder that is arranged downward on the front end of a slide arm that can be expanded and contracted from the front end of a main arm that is horizontally supported on the vehicle body side. In the outrigger of a construction machine or the like to which the attachment is made, a fitting hole for a reinforcing member reinforced by a reinforcing plate is provided on each of the upper surface portion and the lower surface portion of the slide arm tip portion, and the upper end portion on the head side of the vertical cylinder is provided. The upper end of the slide arm is fitted and held in the fitting hole for the upper and lower surfaces so that it does not protrude from the upper surface of the slide arm, and the upper end of the vertical cylinder is attached to the tip of the slide arm. as a wax structure, and the upper end portions of the head side upper end of the vertical cylinder while being fitted and held in Goana fitting for the spigot scan The outer peripheral portion position corresponding to the lower surface level of Idoamu causes overhang the mounting flange, the mounting flange, fixed to the reinforcing plate provided on the lower surface of the distal end of the slide arm, the head side of the vertical cylinder the upper end by the configuration in which the directly attached so that the slide arm tip the parts, as in the prior art outer cylinder, since it was not necessary to use the inner tube, it is possible to reduce the weight.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0009]
FIGS. 1A and 1B show an embodiment of the present invention. In the same configuration as the outrigger 4 shown in FIG. 3, an outer cylinder 12 and an inner cylinder 13 are interposed at the tip of a slide arm 9. Instead of attaching the vertical cylinder 14, the upper and lower surface portions of the tip end portion of the slide arm 9 are provided with the fitting holes 18 for the required diameters reinforced by the reinforcing plates 22, respectively. The above-mentioned head side end portion of the vertical cylinder 19 arranged so that the head side faces upward in 18 is fitted and held so as not to protrude from the upper surface of the slide arm 9, so that a lateral load can be received. A mounting flange 20 is projected over the outer peripheral portion of the vertical cylinder 19 corresponding to the lower surface level of the slide arm 9 and the mounting flange 20 is placed under the slide arm 9. Fixed by bolts 21 to the part reinforcing plate 22, a structure in which to accept another vertical load.
[0010]
The outer diameter of the vertical cylinder 19 is formed to be larger than the outer diameter of the conventional vertical cylinder 14 within a range where a canopy structure is formed with the slide arm 9.
[0011]
In the present invention, the vertical cylinder 19 is directly attached to the distal end portion of the slide arm 9 with a torches structure so that the conventional outer cylinder 12 and inner cylinder 13 are not required, so that the weight can be reduced. Since there is no rattling due to the use of the outer cylinder 12 and the inner cylinder 13, the roll can be reduced.
[0012]
Since the upper end portion of the vertical cylinder 19 does not protrude from the upper surface of the slide arm 9, when the slide arm 9 is stored in the main arm 8, the vertical cylinder 19 is moved into the main arm 8 as shown by a two-dot chain line in FIG. It can be pulled in to the position that reaches. In this case, if the length of the main arm 8 is the same as the conventional one, the total length at the time of storage can be shortened and compaction can be achieved. The slide amount of the slide arm 9 can be increased.
[0013]
In the above embodiment, the case where the head side end portion of the vertical cylinder 19 is made to coincide with the upper surface level of the slide arm 9 is shown, but since the outer cylinder 12 and the inner cylinder 13 are not used, it is slightly Even if it is made to project, it is effective in terms of weight reduction, the direct attachment of the upper end portion of the vertical cylinder 19 to the tip of the slide arm 9 may be performed with a structure other than the wax structure, and the present invention. Of course, various changes can be made without departing from the scope of the present invention.
[0014]
【The invention's effect】
As described above, according to the outrigger of the construction machine or the like of the present invention, the following excellent effects are exhibited.
(1) Construction machinery, etc., where the top end of the vertical cylinder head side is attached to the tip of the slide arm that can be extended and retracted from the tip of the main arm supported horizontally on the vehicle body In the outriggers, the upper and lower surface portions of the slide arm tip are provided with a fitting hole for a wax that is reinforced by a reinforcing plate, and the upper end of the vertical cylinder on the head side does not protrude from the upper surface of the slide arm. In this way, the top and bottom of the slide arm are fitted and held in the bead fitting holes on the upper and lower parts so that the upper end of the vertical cylinder is attached to the tip of the slide arm. Corresponding to the lower surface level of the slide arm at the head side upper end of the vertical cylinder in a state where the portion is fitted and held in the fitting hole for the wax A mounting flange is extended to the outer peripheral position, and the mounting flange is fixed to a reinforcing plate provided on the lower surface of the tip of the slide arm, and the upper end on the head side of the vertical cylinder is connected to the tip of the slide arm. Since it is configured to be directly attached, the conventional outer cylinder and inner cylinder can be eliminated, and the weight can be reduced.
(2) Since the outer cylinder and the inner cylinder are not required as in the prior art, there is no rattling due to the use of the outer cylinder and the inner cylinder, so that the roll can be reduced.
[Brief description of the drawings]
FIG. 1 shows an embodiment of an outrigger such as a construction machine according to the present invention, in which (a) is a partially cut side view, and (b) is a plan view.
FIG. 2 is a schematic view of a concrete pump truck equipped with an outrigger.
FIG. 3 is a partially cut side view showing an example of a conventional outrigger.
[Explanation of symbols]
3 Body 8 Main arm 9 Slide arm 18 Fit hole 19

Claims (1)

In an outrigger such as a construction machine in which the upper end of the head of a vertical cylinder arranged downward is attached to the tip of a slide arm that can be expanded and contracted from the tip of a main arm that is horizontally supported on the vehicle body side The upper and lower surfaces of the slide arm tip are provided with reinforcing holes for reinforcement by reinforcing plates, respectively, so that the upper end of the vertical cylinder on the head side does not protrude from the upper surface of the slide arm. The upper end portion of the slide arm is fitted and held in the fitting hole for the wax on the lower surface portion so that the upper end portion of the vertical cylinder is attached to the slide arm tip portion, and the upper end portion is the above-mentioned outer and corresponding lower surface level of the slide arm in the head-side upper end of the vertical cylinder while being fitted and held in the spigot for fitting Goana The part position to overhang the mounting flange, the mounting flange, fixed to the reinforcing plate provided on the lower surface of the distal end of the slide arm, directly upper part of the head side of the vertical cylinder the slide arm tip portion An outrigger for a construction machine or the like, characterized by having a configuration to be attached.

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