JP2001317041A - Rod connecting method for pile driver and rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform rod connecting work on the ground without carrying out works at elevated level. SOLUTION: A male joint 6a of a lifted lower rod 6 is connected to a female joint 5c of an upper rod 5 in the upper part of a leader 3. A chuck groove 5b of the upper rod 5 is disengaged from a chuck member 4b of a rod rotating drive unit 4. The chuck member 4b is engaged with a chuck groove 6b of the lower rod 6. A joint portion is lowered to the lower part of the leader 3. The lower rod 6 is disengaged from the chuck member 4b, which is engaged with the chuck groove 5b. Connecting pins 13, 13 are inserted into pinholes 8, 8 formed in both joints.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a drilling rod of a pile driver such as a ground improvement machine and the like.

[0002]

2. Description of the Related Art In a pile driving machine, a plurality of excavating rods are connected to perform an excavating operation in many cases. For example, Japanese Patent No. 2741
No. 006 discloses a pile driving machine, in which an output shaft of a rod rotation driving device that can move up and down along a leader is engaged with a square shaft portion inserted through and engaged with the output shaft, and a chuck member of the rod rotation driving device. An upper rod having a chuck groove to be connected and a female joint connecting the lower rod to the lower part is mounted, the rod rotation driving device is pulled up to the upper part of the reader, and the lower rod is lifted by a wire rope from the top sheave on the upper part of the reader. The male joint at the upper part of the lower rod is inserted into the female joint of the rod, and the connecting pins are inserted into the pin holes formed in both joints to connect both rods.

[0003]

However, the above-described connecting pin mounting work is performed by the worker on the leader by climbing the ladder of the leader. Was a time-consuming task.

Accordingly, an object of the present invention is to provide a rod connecting method and a rod for a pile driving machine, which can easily perform a rod connecting operation without performing an altitude operation.

[0005]

In order to achieve the above-mentioned object, a rod connecting method according to the present invention is provided in which an output shaft of a rod rotation driving device which can be moved up and down along a leader is provided with an angle which is inserted into and engaged with the output shaft. A shaft portion, a chuck groove in which the chuck member of the rod rotation driving device is engaged, and an upper rod having a joint connecting the lower rod to the lower portion are mounted, and the joint of the upper portion of the lifted lower rod is inserted into the joint of the upper rod. Then, in a rod connecting method of a pile driver connecting a rod by inserting a connecting pin into a pin hole formed in both joints, a lower rod is connected to the upper rod, and a chuck groove formed in a joint lower part of the lower rod is formed. Engage the chuck member of the rod rotation drive device, lower the joint part to the lower part of the leader, and lower rod and chuck Disengaging with the material, engaging the chuck member with the chuck groove of the upper rod, and inserting the connecting pin into the pin hole, wherein the rod of the pile driver has a joint having an upper joint. In the rod of the hammer, a chuck groove in which the chuck member of the rod rotation driving device is formed is formed below the joint, and an engaging step portion of the rod lifting tool is formed below the chuck groove. Features. In addition, the rod lifting device hinge-connects two halves of a cylindrical body slightly larger in diameter than the outer diameter of the rod, and forms lock pin insertion portions at the open ends of both halves. The half is provided with a hook locking portion of a wire rope.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. Pile driver 1
Is a square shaft that is provided so as to be able to move up and down along a reader 3 erected at the front of the base machine 2 and that is inserted into and engaged with the output shaft 4a of the rod rotation drive device 4. Part 5a and chuck member 4 of rod rotation drive device 4
The upper rod 5 having a chuck groove 5b engaged with the lower rod 6 and a female joint 5c connecting the lower rod 6 to the lower part is mounted, and the chuck member 4b is engaged with the chuck groove 5b of the upper rod 5 so that the upper rod 5 is engaged. 5 is held. The upper rod 5 is a hollow body to which a swivel joint 7 for injecting the ground improvement material is connected to the upper end, and pin holes 8 for connecting the lower rod 6 are formed through the lower female joint 5c. I have.

The lower rod 6 is also a hollow body, and has a male joint 6a connected to the female joint 5c at the upper part, and a chuck member 4b of the rod rotation driving device 4 engages with the lower part of the male joint 6a. In addition to forming the chuck groove 6b to be formed, an engaging step 6c of the rod lifting tool 9 is formed below the chuck groove 6b.

The rod lifting device 9 is a half body 9a, 9a obtained by dividing a cylindrical body slightly larger in diameter than the outer diameter of the lower rod 6 into two parts.
At the open ends of both halves 9a, 9a to form lock pin insertion portions 9b, 9c, respectively.
Is provided with a hook locking portion 9d. The rod lifting tool 9 is mounted on the outer periphery of the lower rod 6 by opening the halves 9a, 9a, closing the halves 9a, 9a, and
It is attached to the lower rod 6 by inserting a lock pin 9e through the b and 9c.

The method of connecting the lower rod 6 to the upper rod 5 of the pile driver 1 is as follows. The rod rotation driving device 4 equipped with the upper rod 5 is pulled up to the upper part of the reader 3 and the rod lifting device 9 is attached to the lower rod 6 on the ground. The hook 11a of the wire rope 11 from the top sheave 10 above the leader 3 is attached to the hook engaging portion 9c of the rod lifting device 9.
, The wire rope 11 is wound up, the rod lifting device 9 is engaged with the engagement step 6c of the lower rod 6, and the lower rod 6 is lifted, and the male joint 6a of the lower rod 6 is
Into the female joint 5c of the upper rod 5.
When the fitting is completed, the wire rope 11 is unwound, the rod lifting device 9 is slid down the outer periphery of the lower rod 6 by its own weight to lower the rod lifting device 9, and the rod lifting device 9 is removed on the ground.

Next, the chuck groove 5b of the upper rod 5
The rod member 4 is disengaged from the chuck member 4b of the rod rotation drive device 4, and the rod rotation drive device 4 is slightly lowered to engage the chuck member 4b with the chuck groove 6b of the lower rod 6. Thereby, the rod rotation drive device 4 can hold the own weight of the lower rod 6 and can give the lower rod 6 a propulsive force necessary for excavation.

Subsequently, the digging tool 12 is attached to the female joint 6d below the lower rod 6, and digging work is started.
When the joint portion of the upper rod 5 and the lower rod 6 descends to the lower part of the leader 3 as the work proceeds, the engagement between the chuck groove 6b of the lower rod 6 and the chuck member 4b of the rod rotation driving device 4 is released, and the rod rotation drive is performed. The device 4 is slightly raised to engage the chuck member 4b with the chuck groove 5b of the upper rod 5. Then, as shown in FIG. 8, the worker on the ground inserts the connecting pins 13 into the pin holes 8,8.
13 are inserted, and the upper rod 5 and the lower rod 6 are properly connected. Thereafter, full-scale excavation work is performed.

When the lower rod 6 is to be removed, on the contrary, the joint portion is positioned below the leader 3 and an operator on the ground pulls out the connecting pins 13, 13.
The rod rotation driving device 4 is slightly lowered to lower the chuck member 4b.
Is engaged with the chuck groove 6b of the lower rod 6, the rod lifting device 9 is attached to the lower rod 6, the hook 11a of the wire rope 11 is hooked on the hook locking portion 9d, the wire rope 11 is wound up, and the rod lifting device 9 is attached to the lower rod. 6, the rod lifting device 9 is engaged with the engaging step 6c of the lower rod 6, the rod rotation driving device 4 is pulled up to the upper part of the reader 3, the wire rope 11 is loosened, and the male The mold joint 6a is detached from the female joint 5c of the upper rod 5.

As described above, since the connecting work between the upper rod 5 and the lower rod 6 can be performed without performing the work of attaching and detaching the pins above the reader 3, the connecting work of the rods is facilitated.

In the above embodiment, the female joint is provided on the upper rod 5 and the male joint is provided on the lower rod 6. However, the male joint is provided on the upper rod 5, and the female joint is provided on the lower rod 6. A joint may be provided.

[0015]

As described above, according to the rod connecting method of the present invention, the joint of the suspended lower rod is connected to the joint of the upper rod at the upper part of the reader, and the chuck groove of the upper rod and the chuck member of the rod rotation driving device are connected. Is disengaged, the chuck member is engaged with the chuck groove of the lower rod, the joint portion is lowered to the lower portion of the leader, and the engagement between the lower rod and the chuck member is released,
Since the chuck member is engaged with the chuck groove of the upper rod and the connecting pin is inserted into the pin holes formed in both joints, the connecting work of the rod can be easily performed on the ground without performing the work at a high place. In addition, a chuck groove in which the chuck member of the rod rotation driving device is engaged is formed in a lower portion of the rod joint, and an engaging step portion of the rod lifting device is formed in the lower portion of the chuck groove. The connection operation of the rod in the pile driver provided with the rod rotation driving device having the rod driving device is facilitated.

[Brief description of the drawings]

FIG. 1 is a front view of an upper portion of a lower rod on which a rod lifting device is mounted.

FIG. 2 is a plan view of a rod lifting device.

FIG. 3 is a side view of a pile driver showing a work of hanging a drilling rod.

FIG. 4 is a side view immediately before connecting a lower rod to an upper rod.

FIG. 5 is a side view showing a state where a chuck member is engaged with a chuck groove of a lower rod.

FIG. 6 is an explanatory diagram of a rod lifting jig removal operation.

FIG. 7 is a side view of a pile driver in which a drill rod is connected to a lower rod.

FIG. 8 is a side view of a pile driver showing an operation of inserting connecting pins into pin holes of both joints.

FIG. 9 is a side view of a state where the connecting pins are used.

FIG. 10 is a side view of a pile driver in which a lower rod is properly connected to an upper rod.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Piling machine, 2 ... Base machine, 3 ... Leader, 4 ... Rod rotation drive device, 5 ... Upper rod, 5a ... Square shaft part,
5b: chuck groove, 5c: female joint, 6: lower rod, 6a: male joint, 6b: chuck groove, 6c
... Engagement step, 8 ... Pin hole, 9 ... Rod lifting tool, 9a
... Half of rod lifting tool, 9b, 9c. Lock pin insertion portion, 9d. Hook locking portion, 9e.
Connecting pin

Claims (3)

[Claims] 1. An output shaft of a rod rotation drive device that can move up and down along a reader, a square shaft portion inserted through and engaged with the output shaft,
A chuck groove in which the chuck member of the rod rotation driving device is engaged, and an upper rod having a lower joint connected to the lower rod are mounted, and a joint of the upper part of the lifted lower rod is fitted to the upper rod joint. In a rod connecting method of a pile driver, in which a connecting pin is inserted into a pin hole formed in a joint to connect both rods, a lower rod is connected to the upper rod, and a rod is driven to rotate in a chuck groove formed below a joint of the lower rod. The chuck member of the device is engaged, the joint part is lowered to the lower part of the leader, the engagement between the lower rod and the chuck member is released, the chuck member is engaged with the chuck groove of the upper rod, and the connection with the pin hole is performed. A method for connecting a rod of a pile driver, comprising inserting a pin. 2. A rod of a pile driver having a joint on an upper part, wherein a chuck groove for engaging a chuck member of a rod rotation driving device is formed in a lower part of the joint, and a rod hoist is formed on a lower part of the chuck groove. A rod for a pile driver, wherein an engaging step of a tool is formed. 3. The rod lifting device according to claim 1, wherein the two halves of a cylindrical body slightly larger in diameter than the outer diameter of the rod are hinged to each other, and lock pin insertion portions are formed at open ends of both halves. 3. A rod for a pile driver according to claim 2, wherein a hook locking portion of a wire rope is provided on one half.