JPH0730747Y2 - Three-point support pile driver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a three-point-supporting pile driver equipped with a large number of winch drums.

[Conventional technology]

In recent years, with the diversification of the construction method of the three-point support type pile driver, a plurality of winch drums and leader hoist drums have been arranged in the upper part of the pile driver main body from the leader bracket side to the rear of the vehicle body. , For example, from the leader bracket side to the rear of the vehicle body, the first winch drum is on the first row, the second winch drum and the third winch drum are on the second row, and the fourth winch drum and the leader hoist are on the third row. In a three-point support type pile driver with drums installed, the wire rope fed from the first and second winch drums is passed to the top sheave block above the leader via the guide sheave provided on the leader bracket. A high gantry sheave in which a leader hoisting rope fed from a leader hoist drum is installed on the main shaft of a gantry frame that stands upright on the rear of the pile driver body. Pass hanging between the gantry sheave provided on the gantry frame of the main shaft via a Midorushibu connected to the reader via a pendant rope,
It has become more common to wire the wire rope fed from the third and fourth winch drums from the rear side of the vehicle body through a high gantry sheave provided on the main shaft of the gantry frame.

[Problems to be solved by the device]

However, since the main shaft of the gantry frame is also provided with the gantry sheave, the gantry sheave and the wire rope fed from the third and fourth winch drums passing through the high gantry sheave sometimes interfered with each other. Therefore, for example, as disclosed in Japanese Utility Model Laid-Open No. 60-172853, a guide roller is provided on the lower surface of the gantry sheave, and the wire rope is fed from the third and fourth winch drums via the guide roller. Wires were used, or the gantry sheave was flipped up and fixed with a bar. However, when passing through the guide rollers on the bottom surface of the gantry sheave, the wire fed from the third and fourth winch drums by the weight of the gantry sheave. The ropes were bent unnaturally, adversely affecting these wire ropes. If you want to flip up the gantry sheave,
This requires manual labor at high places, which causes a safety problem.

Therefore, the present invention provides a three-point support type pile driver that prevents interference between the gantry sheave and the wire rope paid out from the winch drum on the rear side of the vehicle body, improves the life of the wire rope, and improves work safety. Is intended.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a plurality of winch drums sequentially from the leader bracket side to the rear of the vehicle body on the upper part of the pile driver main body and a leader hoist drum, and a gantry on the rear part of the pile driver main body. The frame is erected, and the wire rope that is fed from the winch drum on the leader bracket side is hung on the top sheave block above the leader via the guide sheave provided on the leader bracket, and the leader hoisting rope that is fed from the leader hoist drum is installed. , A three-point support type pile driving suspended between a gantry sheave provided on the main shaft of the gantry frame via a high gantry sheave provided on the main shaft of the gantry frame and a middle sheave connected to the leader via a pendant rope. Machine, the guide sheave is attached to the main shaft of the gantry frame. The sheave block with the suspended,
It is characterized in that the wire rope fed from the winch drum on the rear side of the vehicle body is hung from the rear side of the vehicle body through the guide sheave of the sheave block to the guide sheave provided on the leader.

[Action]

With such a configuration, the guide sheave of the sheave block suspended on the main shaft of the gantry frame is arranged below the main shaft of the gantry frame and behind the gantry sheave pulled up to the leader side via the pendant rope. The wire rope unwound from the winch drum on the rear side of the vehicle body and wired from the rear side of the vehicle body through the guide sheave of the sheave block does not interfere with the gantry sheave.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In the three-point support type pile driver 1, a pile driver main body 3 is rotatably provided on an upper portion of a lower traveling body 2, and a leader 5 installed upright on a leader bracket 4 in front of the pile driver main body 3 is piled. It is supported by two back stays 7,7 provided on outrigger arms 6,6 extending to the left and right of the rear part of the machine body 3.

On both sides of the leader bracket 4, front jacks 8,8
Is provided, and at the time of work, the front jacks 8 and 8,
The outrigger arms 6, 6 are respectively extended with the outrigger jacks 9, 9 to horizontally support the three-point support type pile driver 1.

A gantry frame 10 is erected on the upper rear side of the pile driver body 3, and a gantry sheave 12 and a high gantry sheave 13 are provided on a main shaft 11 of the gantry frame 10.
Further, a sheave block 14 is rotatably suspended from the main shaft 11.

This sheave block 14 has guide sheaves 15 and 16, and since the sheave block 14 is suspended on the spindle 11,
The guide sheaves 15 and 16 are arranged below the main shaft 11.

In addition, at the upper part of the pile driver main body 3, the first winch drum 17 is arranged in the first row from the side of the leader bracket 4 toward the rear of the vehicle body.
However, the second winch drum 18 and the third winch drum 19 are arranged in the second row, and the fourth winch drum 20 and the leader hoist drum 21 are arranged in the third row.

The wire ropes 22, 23 fed from the first winch drum 17 and the second winch drum 18 are hooked on a top sheave block (not shown) above the leader 5 via guide sheaves 24, 25 provided on the leader bracket 4. It has been passed.

Further, the wire rope 26 fed from the third winch drum 19 is hung from the rear side of the vehicle body on the guide sheave 15 of the sheave block 14, passes through the guide sheave 27 provided on the leader bracket 4, and then passes through the fourth winch drum 20. The wire rope 28 that is unwound from the vehicle is hung from the rear side of the vehicle body on the guide sheave 16 of the sheave block 14 and passes through the guide sheave 29 provided on the leader bracket 4 to guide sheave (not shown) provided on the leader 5. ) Have been handed over respectively.

Further, the leader undulation rope 30 fed from the leader hoist drum 21 is passed between the gantry sheave 12 and the middle sheave 31 via the high gantry sheave 13, and the pendant rope 32 is provided between the middle sheave 31 and the leader 5. Are linked together.

With this configuration, the gantry frame 10
Guide sheave of sheave block 14 suspended from the spindle 11 of
15, 16 are arranged below the main shaft 11 of the gantry frame 10 and behind the gantry sheave 12 pulled up to the leader 5 side via the pendant rope 32,
Even if the gantry sheave 12 hangs down slightly after the leader 5 stands up, the wire rope 2 of the 3rd and 4th winch drums 19 and 20
Since the 6 and 28 can be wired without interfering with the gantry sheave 12, the lifespan of the wire ropes 26 and 28 can be improved, and the gantry sheave 12 does not have to be manually lifted up, so that the work can be performed. The safety can be secured.

Although the sheave block having two guide sheaves is hung on the main shaft of the gantry frame in the above embodiment, the number of guide sheaves is not limited to this.

[Effect of device]

As described above, in the three-point support type pile driver of the present invention, a plurality of winch drums are sequentially arranged and a leader hoist drum is arranged at the upper part of the pile driver body from the leader bracket side to the rear of the vehicle body. A gantry frame is installed upright on the rear of the pile driver, and the wire rope fed from the winch drum on the leader bracket side is passed to the top sheave block above the leader via the guide sheave provided on the leader bracket, and the leader hoist is installed. The leader undulation rope extended from the drum is hung between the gantry sheave provided on the gantry frame spindle via the high gantry sheave provided on the gantry frame spindle, and the middle sheave connected to the leader via the pendant rope. Sheaves that have guide sheaves on the main shaft of the gantry frame The gantry frame main shaft is suspended because the wire rope extended from the winch drum on the rear side of the vehicle body is hung from the rear side of the vehicle body through the guide sheave of the sheave block to the guide sheave provided on the leader. The guide sheave of the sheave block suspended on the vehicle is arranged below the main shaft of the gantry frame and behind the gantry sheave that is pulled up to the leader side via the pendant rope. The wire rope unwound from the vehicle body and wired from the rear side of the vehicle body through the guide sheave of the sheave block does not interfere with the gantry sheave, so that the life of the wire rope and the work safety can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view of a three-point support type pile driver, FIG. 2 is a front view of a gantry device and wiring from each winch drum, and FIG. 3 is a gantry. FIG. 4 is a plan view near the main axis of the frame, and FIG. 4 is a front view near the main axis of the gantry frame. 1 …… Three-point support type pile driver, 3 …… Pile driver main body, 5 …… Leader, 10 …… Gantry frame, 11 …… Spindle, 12 ……
Gantry sheave, 13 …… High gantry sheave, 14…
… Sheave block, 15, 16 …… Guide sheave, 17 …… 1st winch drum, 18 …… 2nd winch drum, 19 ……
3rd winch drum, 20 ... 4th winch drum, 21 ...
… Leader hoist drum, 22,23,26,28 …… Wire rope, 24,25,27,29 …… Guide sheave, 30 …… Leader undulating rope, 31 …… Middle sheave, 32 …… Pendant rope

Claims (1)

[Scope of utility model registration request] 1. A plurality of winch drums are sequentially arranged on the upper part of the pile driver main body from the side of the leader bracket toward the rear of the vehicle body, a leader hoist drum is arranged, and a gantry frame is erected on the rear part of the pile driver main body. Then, the wire rope unwound from the winch drum on the leader bracket side is hung on the top sheave block above the leader via the guide sheave provided on the leader bracket, and the leader erection rope unwound from the leader hoist drum is attached to the gantry frame. In a three-point support type pile driver suspended between a gantry sheave provided on a main shaft of a gantry frame via a high gantry sheave provided on a main shaft and a middle sheave connected to a leader via a pendant rope, A sheave with a guide sheave on the main axis of the gantry frame And a wire rope unwound from a winch drum on the rear side of the vehicle body is hung from the rear side of the vehicle body through a guide sheave of the sheave block to a guide sheave provided on the leader. Point-supported pile driver.