JPS60102418A - Movable type pile driver - Google Patents

Abstract

PURPOSE:To widen working range within a stable limit by a method in which a mast part is provided in a rocking manner on the front of an upper rotator, a leader 5 is provided pivotally to the upper part of the mast part, and the mast part and the leader are connected at their lower parts by an oil-pressure cylinder. CONSTITUTION:The lower end of a mast part 10 is attached in a rocking manner to the front frame of an upper rotator 2 by a pin 14, and the upper part of the mast part 10 and the rear of the upper rotator 2 are connected with a supporter 7 with paired oil-pressure cylnders 7a. A leader 5 is pivotally attached to the upper end front of the mast part 10 by a pin 12, and an oil-pressure cylinder 13 is provided between the lower part of the mast part 10 and the leader 5. For slantly driving a pile, the operating amount of the cylinders 7 and 13 are properly adjusted for most stable operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile pile driver equipped with a traveling body and an upper revolving body rotatably mounted on the traveling body.

Next, a conventional mobile pile driver will be explained with reference to FIGS. 1 and 2.

An upper rotating body 2 is mounted on the upper part of the lower traveling body l, which is equipped with an endless crawler track, so as to be able to freely rotate via a rotating wheel.
At the front of the upper revolving body 2, a league support stand 3 is attached to pins 4A, 4.
It is fixed by B. At the front of the league support stand 3,
A guide rail is provided on which various types of piling tools 6 (for example, hammers, earth auger devices, etc.) are attached so that they can slide up and down. Hydraulic cylinders 7a (7a') are supported by hydraulic cylinders 7a (7a'
), the upper ends of a pair of left and right support members 7° and 7' are connected by a pin. Hydraulic shilling of support member 7.7'? The lower end of a (7a') is supported by the rear end of the upper revolving body 2.

The above-mentioned pile driver is called a three-point pile driver, and has better stability than a crane boom type pile driver and the like, and has the advantage of being able to easily tilt the league forward and backward. However, the first
As shown in the figure, it is structurally impossible to drive the pile 9 perpendicularly at a certain distance (radius) from the center of the machine on a low ground following a slope. Incidentally, FIG. 1 shows a working state in which a stake 9 is driven vertically at a distance r from the center of the machine.

Figure 2 shows the posture for performing diagonal pile driving work, and the league 5 tilts backward according to the amount of shortening of the hydraulic cylinders 7a (7a').The center of gravity of the general construction vehicle body is at the rear, and Since the work tool 6 is also located above the league 5, the center of gravity of the entire pile driver is further rearward, and the rear stability is extremely deteriorated, so there is a working limit to the inclination angle θ of the league 5. This leads to extremely inferior ability compared to vertical pile driving ability.

This invention makes it possible to increase the driving radius of a pile during vertical pile driving within the stability limits of the entire pile driver, and also to smoothly perform backward slope pile driving and forward slope pile driving. The purpose is to provide a mobile pile driver that can.

In the mobile pile driver of the present invention, the lower end of the mast member is swingably attached to the mounting hole of the frame at the front of the upper revolving body using a pin, and the left and right pairs are attached to the left and right parts of the upper part of the mast member. The upper ends of the mast support members with hydraulic cylinders are connected, the lower ends of the mast support members with both front pressure cylinders are supported on the rear part of the upper revolving structure, and the leak pins for attaching various work tools are connected to the upper ends of the mast members. The lower end of the league is rotatably suspended, and a hydraulic cylinder is interposed between the lower end of the mast member and the attachment part of the frame of the upper revolving body.

Vertical pile driving using the mobile pile driver of this invention.

This is done by holding the league vertically by expanding and contracting the hydraulic cylinders of the mast support member and the hydraulic cylinder connected to the lower end of the league. In addition, back-slant pile driving and front-slope pile driving are performed by balancing the entire machine by combining the amount of expansion and contraction of each cylinder.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5. In these figures, the same reference numerals as in FIGS. 1 and 2 represent the same or equivalent items.

The lower end of the mast member 10 is attached to the attachment hole of the front frame part of the upper revolving body 2 so as to be able to swing with a pin 4A. The upper ends of the mast support members 7, 7 with hydraulic cylinders 7a, 7a are connected by pins, respectively. Hydraulic sill Tab7a of both mast support members 7.7
The lower end of ' is supported by the rear part of the upper revolving body 2.

A league 5 to which a working tool 6 is attached is rotatably suspended from the front part of the upper end of the mast member 10 by a pin 12.
A hydraulic cylinder 13 is interposed between the lower end of the league 5 and the lower end of the mast member 10. That is, one end (base end) of the hydraulic sill 13 is connected to the lower end of the mast member 10 by a pin 14, and the other end (tip of the piston rod) is connected to the lower end of the league 5 by the pin 151. It is connected to the back part. One end of the hydraulic sill 13 may be connected to a mounting portion of the frame of the upper revolving body 2.

A sheave 18 is attached to the top of the mast member 10 for guiding the hoisting rope 17 that is let out from the hoisting winch 16 on the upper revolving structure 2.

When performing vertical piling work as shown in FIG. 3, the leader 5 is held vertically by extending the hydraulic cylinders 7a, 7a' and by extending and retracting the hydraulic cylinders 13. At this time, the mast member 10 swings forward by an angle of β to a position ζ. In this state, the pile 8 is driven vertically by the work tool 6. L represents the working radius from the center of the machine.

Fig. 4 shows a state in which the beam 5 is tilted backward to perform oblique piling work. In this case, one thing is that by combining the amount of expansion and contraction of the hydraulic sills 7a and 7a and the hydraulic sill 13, the rear inclination angle β of the mast member IO and the rear inclination angle θ of the league 5 can be arbitrarily combined. , the angles β and θ
The combination angle can be set depending on the weight distribution of the work tool 6 and the pile 8, etc., so as to provide the most stable center of gravity relationship for the pile driver as a whole. Note that 5a is a supplementary league, which is connected to the lower end of the leak 5 as necessary when the height from the ground to the lower end of the league becomes too large.

FIG. 5 shows a state in which a pile driver is mounted on a work boat S, and each pile driver 5 is tilted forward to perform diagonal pile driving work. Depending on the combination of the expansion and contraction of the hydraulic cylinders 7a and 7a' and the balance of the center of gravity, any combination of the forward inclination angle β of the mast member 10 and the forward inclination angle θ of the league 5 can be achieved. can get.

According to the invention described above, the working radius can be increased compared to conventional pile driving machines within the stability limits of the entire pile driving machine, and therefore the working range can be widened. In addition, when performing diagonal piling work with the league tilted backwards, it is possible to arbitrarily combine the backward tilt angles of the mast member and the league to perform the work in the most stable condition. Compared to other machines, the performance of driving diagonal piles with the same size main body can be greatly improved. Additionally, when performing diagonal piling work with the leader tilted forward, the pile driving point can be moved away from the front end of the undercarriage depending on the installation situation of the pile driver. Equipped with a machine, it is possible to efficiently perform forward slope pile driving.

[Brief explanation of drawings]

Figures 1 and 2 are side views of a conventional mobile pile driver.
The figure shows the vertical pile driving condition, and Figure 2 shows the backward inclined pile driving condition. Figures 3 to 5 are side views of one embodiment of the present invention, with Figure 3 showing the vertical pile driving condition, Figure 4 showing the backward inclined pile driving condition, and Figure 5 showing the pile driving condition on the work boat. Shows the state of sloping pile driving in front of Oharu. 1. Middle lower traveling body, 2. Upper rotating body, 4A-1 pin,
5--Lead, 6--Pile driving tool, 7--Supporting member, 9--Pile 10@9 mast member, 11--Pin. 12 @ Pin, 13 Fist/Hydraulic cylinder, 14... Pin, 15... Pin Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a mobile pile driver equipped with a traveling body and an upper rotating body rotatably mounted on the traveling body, the lower end of the mast member is attached to the mounting hole in the front frame of the upper rotating body using a pin. The upper end of the mast support member with a pair of left and right hydraulic cylinders is connected to the left and right parts of the upper part of the mast member, and the lower end of the mast support member with a single hydraulic cylinder is supported at the rear of the upper revolving structure. At the upper end of the mast member, a leak for attaching various work tools is hung on a pin so that it can rotate freely, and between the lower end of the league and the lower end of the mast member or the attachment part of the frame of the upper revolving structure. A mobile pile driver characterized by having a hydraulic sill interposed therein.