JPH0442358Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an auger screw guide device for a pile driver.

[Prior Art] Some conventionally used pile drivers are of the type that drills a pile hole in advance with an auger and then drives the pile with a hammer.

If a pile driver is equipped with only three winches, one for hoisting a pile in addition to one for hoisting an auger and a winch for hoisting a hammer, when digging a pile hole with an auger screw, the As shown, a wire rope c tied to the auger drive device at the upper end of the auger screw a is passed through a thrust sheave g attached to a bracket f extending over the revolving body e of the vehicle d, and then connected to the winch h. A downward load is applied to the auger screw a by winding it up.

In addition, when suspending a pile into a pile hole, as shown in Figure 6, pass the wire rope c through the sheave j, then through the sheave group k at the top of the leader column i, hang it on the pile, and wind it with a winch h. I try to pick it up and hang it up.

[Problems to be solved by the invention] Therefore, in the conventional example, the wire rope c must be raised to the top of the leader and connected to the auger drive device b each time a pile hole is dug.
It was a pain to replace it.

Further, since the thrust sheave bracket f supports the downward force applied during excavation of the auger screw a, considerable strength is required, resulting in a large weight.

[Means for Solving the Problems] The present invention was made with the aim of solving the problems of the conventional example described above, and includes a frame that fits on the leader and moves up and down to hold the auger screw guide. A hollow chamber is provided between the screw guide and the leader, a thrust sheave is pivotally supported in the hollow chamber so as to be rotatable in a vertical plane, a thrust rope is wound around the thrust sheave, and the thrust sheave is wound around the thrust sheave. This invention relates to an auger screw guide device, characterized in that one end of the auger drive device is connected to the auger drive device, and the other end is connected to a pile hoisting rope that can be wound up by a winch.

[Function] When a pile-hanging rope that can be wound up by a winch is connected to a thrust rope and wound up, the thrust rope applies a downward force to the auger screw, making excavation easier.

By connecting the rope to the top of the auger and winding it up, the auger can be pulled out of the hole.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

1 to 4 show an embodiment of the present invention, in which 1 is a leader column, 2 is a leader for an auger screw, 3 is a leader for a hammer, and 4 is an auger screw. A hollow chamber 6 is provided in the frame 5 fitted so as to be able to move up and down, and a thrust sheave 7 is supported within the hollow chamber 6 by pins 8 and bearings 9 so as to be rotatable in a vertical plane. Here, the size of the hollow chamber 6 can be made as small as possible so that the thrust sheave 7 can rotate.

Two holes 10 and 11 are bored in the upper surface of the frame 5 at an interval slightly smaller than the diameter of the thrust sheave 7, and a thrust rope 12 inserted through one hole 10 is wound around the thrust sheave 7 at the rear end. The thrust rope 12 is pulled out from the hole 11 of the
One end is connected to the wedge 15 and socket 16, which have a pin 14 pivotally attached to the power swivel thrust anchor 13, by a clamp 17, and the other end is connected to the hook at the end of the pile hanging rope with a shackle. It is made so that it can be connected.

Further, a screw guide 18 is attached to the front surface of the frame 5 via a top tap 19 and a bolt 20, and a rod 2 is attached to the lower surface of the frame 5 in a cylinder 22 with earth removal plates 21 provided on both sides of the frame 5.
The leader 2 is removably mounted by inserting the leader 3 and fixing it with a bolt 24, and furthermore, a stopper for preventing the frame 5 from falling off is attached to the lower end of the leader 2 with a bolt or the like.

With the above configuration, when digging a pile hole with the auger screw 4, the pile hanging rope 25, which is wound up and unwound by a winch (not shown), is connected to the thrust rope 12 with a shackle or the like. When the pile hanging rope 25 is wound up by a winch, the thrust sheave 7 is fixed to the lower part of the leader 2 via the frame 5 and supports the reaction force, so that the power swivel thrust fixed to the thrust sheave 7 and the auger drive device As a result, the thrust rope 12' between the thrust rope 12' and the anchor 13 tries to be drawn into the hollow chamber 6 from the hole 11, and a downward force acts on the auger screw 4, and the rotation of the auger screw 4 efficiently pulls the pile. A hole is drilled.

Pile hanging rope 25 wrapped around after the pile hole has been excavated
The connection between the pile and the thrust rope 12 is released, the pile hanging rope 25 is unwound, and the pile is fitted into the excavated hole.

The thrust sheave 7 is located on the rear side of the screw guide 18 and is housed in the hollow chamber 6 of the frame 5, so that it is not covered with excavated soil.

In addition, the pile hanging rope 25 is connected to the thrust rope 12.
The frame 5 and the screw guide 1 are connected to the ends of the frame 5 and the screw guide 1 by unfastening the frame 5 from the leader 2 and winding up the pile hanging rope 25.
When the pile hanging rope 25 is unwound, the frame 5 and the screw guide 18 are lowered and stopped by the stopper.

Furthermore, by rotating the upper revolving body, the earth removal plate 21 removes the excavated earth around the pile hole.

It should be noted that the auger screw guide device of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, the auger screw guide device of the present invention can provide various excellent effects as described below.

() Since the thrust sheave is supported using the frame for fixing the screw guide, the conventional thrust sheave bracket is not required, making it possible to reduce the size and weight.

() The vertical movement of the guide and the vertical movement of the auger screw can be performed simply by connecting a pile-hanging rope that can be wound up with a winch to the thrust rope. Therefore, there is no need to sling a rope as in the past.

() The thrust sheave is located behind the screw guide, so it does not cover excavated soil.

() If the screw guide is detachably held in the frame, when changing the auger screw diameter, it is only necessary to replace the cylindrical portion of the screw guide.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the auger screw guide device of the present invention, Fig. 2 is a view taken in the - direction arrow of Fig. 1, and Fig. 3 is a view taken in the - direction arrow of Fig. 2.
Fig. 4 is a view taken in the - direction of Fig. 1, Figs. 5 and 6 are explanatory diagrams showing an example of a conventional pile driving vehicle, and Fig. 5 shows the state of excavating a pile hole with an auger screw. The explanatory diagram shown in FIG. 6 is an explanatory diagram showing a state in which the august chestnut is pulled out from a pile hole. 2 is the leader, 4 is the auger screw, 5 is the frame, 6 is the hollow chamber, 7 is the thrust sheave, 10,
11 is a hole, 12 is a thrust rope, 18 is a screw guide, and 21 is an earth removal plate.

Claims (1)

[Scope of utility model claims] A hollow chamber is provided in the frame that is fitted into the leader and moves up and down to hold the auger screw guide, and a hollow chamber is provided between the screw guide and the leader, and a thrust sheave is installed in the hollow chamber so as to be able to rotate in a vertical plane. A thrust rope is hung around the thrust sheave, and one end of the thrust rope is connected to an auger drive device, and the other end is connected to a pile hoisting rope that can be wound by a winch. An auger guide device featuring: