JPH024731B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger device for a three-point support type pile driver.

Figures 1 to 3 show the working posture of a conventional three-point support type pile driver, and Figure 1 is a side view;
FIG. 2 shows a front view, and FIG. 3 shows a plan view. The base machine main body 2 of the pile driving machine 1 is placed on a lower traveling body 3 having a crawler 3' expansion/contraction mechanism (not shown). A leader support bracket 4 is fixedly installed in front of the leader 5, and the lower part of the leader 5 is pivotally supported by the leader support bracket 4, and the upper part is supported from the rear by left and right columns 6, 6.

The left and right columns 6, 6 are fixed to the outrigger device 10 via column cylinders 7, 7, respectively,
The leader 5 is expanded and contracted by the column cylinders 7, 7.
It can be tilted left and right and forward and backward.

As shown in FIGS. 4 and 5, the outrigger device 10 has a hollow rectangular outrigger box 11 fixed to the rear lower part of the base machine body 2, and the outrigger box 11 includes an outrigger beam 12,
12 is slidably inserted through hydraulic cylinders 14, 14, and the outrigger beams 12, 1
Outrigger cylinders 13, 13 are removably provided on the end faces of the hydraulic cylinders 14, and strut mounting portions A, A are provided on the top faces of the hydraulic cylinders 14, as shown in FIG. , 14 are reduced to the width L ₁ of the base machine body 2, and the outrigger beams 12, 12 are housed in the outrigger box 11, and during pile driving work, the outrigger beams 12, 12 are reduced as shown in the side of FIG. The hydraulic cylinders 14, 14 are extended to extend the outrigger beams 12, 12, and fixed to the outrigger box 11 with the pins 15, 16. The spherical bearing (not shown) shown in the figure) is fixed, the outrigger cylinders 13, 13 are extended,
This is to measure the stability of the pile driver 1. In addition, the lower traveling body 3 uses an expansion device (not shown) to reduce the left and right crawlers 3', 3' to a width of L ₁ during transportation, and expands the crawlers 3', 3' to a width of L ₂ during pile driving work. It is configured to do so.

However, there is a limit to the width L ₁ of the pile driver 1 during transportation, and in an outrigger device in which the outrigger beams 12, 12 are inserted into one outrigger box 11 from the left and right, the outrigger cylinder 1
The support width L ₃ of the outrigger beams 12 and 13 is limited, and the overhang strength of the outrigger beams 12 and 12 is also limited, and in the case of a long leader, the stability of the pile driver 1 is reduced.

For truck cranes, etc., a method has been invented in which two-axle outrigger boxes are installed parallel to each other in the front and back or up and down to sufficiently increase the amount of overhang of the outrigger beam.However, in the outrigger device of a three-point support type pile driver, Even if the outrigger boxes are installed parallel to each other in the front and back or up and down, the left and right support mounting parts are not located symmetrically on the base machine body, so the left and right lengths of the columns are different, and when the column cylinders are synchronized, A problem occurs.

The present invention has been made in view of the above, and is an outrigger device for a three-point support type pile driver, in which two outrigger boxes are disposed in the rear part of the base machine body so as to be stacked in the front-rear direction or the vertical direction. Outrigger beams are telescopically fitted into the outrigger boxes via hydraulic cylinders, respectively, so that when the outrigger beams are extended, the centers of the rear attachment parts of the left and right columns are positioned symmetrically with respect to the base machine body. The outrigger box is characterized by being installed at an angle, and its purpose is to allow it to be stored within the width of the base machine body during transportation, and to stabilize the machine by increasing the overhang strength of the outrigger beam and the support width of the outrigger cylinder during pile driving work. The purpose of this invention is to solve problems during synchronized operation of the column cylinders by providing the column mounting portions at symmetrical positions on the base machine body.

Next, one embodiment of the present invention will be explained in detail with reference to FIGS. 6 and 7. 6 shows a plan view, FIG. 7 shows a side view, the side of FIG. 6 a and the side of FIG. 7 a show the transportation posture, the side of FIG. 6 b and the side of FIG. In the drawings, the same reference numerals as in FIGS. 1 to 5 indicate the same parts.

At the rear lower part of the base machine main body 2, two square hollow outrigger boxes 21, 21 of the outrigger device 20 are arranged parallel to each other and slightly inclined to the longitudinal center line of the base machine main body 2. . The outrigger beams 2 are connected to the outrigger boxes 21, 21 via hydraulic cylinders 23, 23, respectively.
2, 22 are telescopically inserted, and the outrigger cylinder 13,
13 are arranged respectively. Furthermore, the outrigger beams 22, 22 have left and right column mounting portions B,
B' is arranged, and the outrigger beam 22,
22 is fixed to the outrigger boxes 21, 21 by pins 25, 26, respectively.

Further, the outrigger boxes 21, 21 are tilted by Θ so that the centers O, O of the left and right column attachment parts B, B' are in symmetrical positions on the base machine body 2 when the outrigger beams 22, 22 are extended. It is arranged at the rear lower part of the base machine main body 2.

FIGS. 8 to 9 show other embodiments of the present invention, and the same reference numerals as in FIGS. 1 to 7 represent the same elements.

The two hollow rectangular outrigger boxes 31, 31 of the outrigger device 30 are arranged vertically and slightly inclined at the rear lower part of the base machine main body 2. Outrigger beams 32, 32 are telescopically inserted through cylinders 33, 33, and outrigger cylinders 13, 13 are disposed on the end surfaces of the outrigger beams 32, 32, respectively.

Further, the outrigger beams 32, 32 are provided with left and right column attachment parts C, C', which are fixed to the outrigger boxes 31, 31 with pins 35, 36, respectively, when the outrigger beams 32, 32 are extended. .

The base of the outrigger boxes 31, 31 is tilted by Θ so that the centers O, O of the left and right column attachment parts C, C' are at symmetrical positions on the base machine body 2 when the outrigger beams 32, 32 are extended. It is arranged at the rear lower part of the machine body 2.

As is clear from the above description, the present invention has two outrigger boxes stacked front to back or top and bottom parallel to each other, and is inclined by Θ with respect to the base machine body, so that the left and right support cylinders can be Since the lengths are uniform, troubles during synchronized operation of the column cylinders are eliminated, and the amount of overhang of the outrigger beams is increased, so the support width of the outrigger cylinders is reduced.
L ₄ is larger than before, and the fixed pin widths S ₂ and S ₃ of the outrigger beam are also much larger than the conventional pin width S ₁ , which not only improves the stability of the aircraft, but also allows the outrigger cylinder to be attached during transportation. It has the advantage that it is transportable and the work required to assemble and disassemble the pile driver can be greatly reduced.

[Brief explanation of drawings]

Fig. 1 is a side view of a conventional pile driver, Fig. 2 is a front view, Fig. 3 is a plan view, Fig. 4 is a plan view of a conventional outrigger device, Fig. 5 is a front view of Fig. 4, 6 is a plan view of an outrigger device according to the present invention, FIG. 7 is a front view of FIG. 6, FIG. 8 is a plan view of an outrigger device showing another embodiment of the present invention, and FIG. FIG. 1 is a pile driver, 2 is a base machine body, 3 is a lower running body, 3' is a crawler, 5 is a leader, 7 is a column cylinder, 13 is an outrigger cylinder, 21, 3
1 is an outrigger box, 22 and 32 are outrigger beams, and B, B', C, and C' are column attachment parts.

Claims (1)

[Claims] 1. In an outrigger device for a three-point support type pile driver, two outrigger boxes are arranged in the rear part of the base machine body, stacked one on top of the other in the front-rear direction or vertical direction, and an outrigger beam is connected to each of the outrigger boxes via a hydraulic cylinder. The outrigger box is telescopically inserted into the base machine, and the outrigger box is tilted so that when the outrigger beam is extended, the centers of the rear attachment portions of the left and right columns are positioned symmetrically with respect to the base machine body. Outrigger device for three-point support type pile driver.