JPH0374285B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pile driving machine, in which the leader is always suspended vertically when the leader is attached to the tip of the boom.

The pile driving machine used for driving piles and perforating the ground with an auger screw uses a crawler crane, etc., lifts the boom, attaches a leader hanging from the tip, and connects and fixes the lower end of the leader to the car body with a catch hawk. Hammers, screws, etc. are operated to move up and down along with the leader, but the boom and leader are usually fixed by connecting the boom head at the tip of the boom to one side of the leader via a connecting member. Since the fulcrum is far from the center axis of the leader, the attached leader will not be vertical but will be slightly tilted forward, so the lower end of the leader will need to be corrected using a catch hawk so that it is properly vertical. It needs to be fixed. This has the disadvantage that it takes time to make adjustments each time it is moved to the next construction position.

In contrast, in this invention, a fulcrum for the boom head of the leader is provided along the central axis of the leader, and the leader is suspended from the fulcrum so as to be tiltable forward, backward, left, and right. , the tip member to be attached to the boom head,
It is formed into a support arm that protrudes toward the back of the reader, and its tip member is inserted into the inside of the reader and connected with a pin at its central axis position, and the tip member is rotatable relative to the main body of the support arm. It is composed of

An embodiment of this invention will be explained with reference to the drawings.
In FIG. 2, reference numeral 1 denotes a boom head connected to the tip of the telescopic boom, and a sheave 2 of the winding rope is provided inside the box-shaped member to form a sheave assembly. A mounting seat 3 to which a supporting arm can be fixed is formed in advance on the front surface of the top of the boom head 1.

Next, reference numeral 4 denotes a support arm, and as is clear from FIG. A planar U-shaped frame 10 is fixed to a cylindrical rotating part 9 that is rotatably fitted through the metal fittings 8 and fixed to the cylindrical rotating part 9 with a stopper 8, and a pin insertion hole 11 is provided in the frame 10. , 11,
The mounting parts are overlapped on the mounting seat 3 of the boom head 1 and fixed with bolts.

As is clear from FIG. 1B, this support arm 4 is
After the tip member 12 is inserted into the inside of the leader 13 and engaged with the mounting projection 14 provided in the leader in alignment with the central axis of the leader, the pin 15 is inserted from the pin insertion holes 11, 11 to the mounting projection.
The support arm 4 is normally attached to the boom head 1 in advance, and in the embodiment shown in the figure, the leader 13 connects the boom and the leader in sequence. It is formed into an integrated assembly structure.

This invention has the above configuration, and includes FIGS.
As shown in B and C, the tip member 12 of the support arm 4 previously attached to the boom head 1 at the upper end of the telescoping boom 16 of the crawler crane is positioned on the leader center axis, and a large number of circular holes provided on the circumferential surface of the leader 13 are inserted. Insert pin 15 using the
3 is held suspended. With this configuration, the reader 13
The support arm 4 is swingable in the front and rear directions and the lateral direction via the pin 15 and the rotating part 9, respectively, so that it is naturally held vertically in a suspended state. There is no protrusion on either side of the leader 13, so as shown in the figure, an auger screw 17 is attached to one side for boring, and a monkey bars 18 are attached to the other side for left and right operations. It is suitable for balancing the weight and driving the stake 19. Since the leader 13 is always held vertically and the boom is a telescoping boom, even when moving to the next construction position, the boom must be rotated using the turntable of the vehicle and manipulated to extend its length. The next work can be easily started by simply changing the inclination angle, and if work is to be done on both sides of the leader at the same time, it is sufficient without a catch hawk as shown in Figure 1C. Extremely efficient.

[Brief explanation of drawings]

Figures 1A, B, and C are a left side view, a front view, and a right side view showing working conditions by the pile driving machine of the present invention, Figure 2 is a side view showing the boom head portion in Figure 1A, and Figure 3. 4 is a front view of the support arm, and FIG. 5 is a sectional view taken along the line E--I of FIG. 3. 1...Boom head, 4...Support arm, 5...Mounting part, 6...Support arm main body, 12...Tip member,
13...Leader, 15...Pin.

Claims (1)

[Claims] 1. In a hammering machine that has a structure in which a leader is suspended from the boom head, which is the tip of the telescopic boom, via a connecting member, and a hammer and earth auger are attached to both left and right sides of the leader, the connecting member is moved forward from the boom head. The support arm is formed into a supporting arm that protrudes and enters into the reader from the back side of the reader, and is connected to a mounting protrusion that is provided in advance in the reader in alignment with the central axis of the reader. are arranged on the center axis of a leader, and are connected to each other so as to be rotatable in the longitudinal and lateral directions relative to the center axis.