JPH06116954A - Positioning device for pile and method thereof - Google Patents

Abstract

PURPOSE:To make it possible to position the lower end of a pile to a driving position efficiently, accurately and safely in the case the pile is driven and to make it possible to drive the pile with high degree of accuracy of vertical. CONSTITUTION:To link pile holder members 1A and 1B consisting of first links 10a and 10b capable of turning horizontally against a leader 5 and second links 12a and 12b capable of turning horizontally against the first links 10a and 10b are mounted to both sides of the lower end of the leader 5 of a pile driver 1. Pile holding rollers 13 contacted with sides of a pile are mounted to the pile holder members 1A and 1B. A guide device 15 guiding a rope 4a wound on a winch 4 mounted on a body of the pile driver 1 and used for drawing the pile near is provided on at least the pile holder member 1B. The pile 8 is drawn near to two pile holding rollers 13 by the rope 4a to position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device and a method for positioning a pile used in positioning a pile along a leader in a mobile pile driving machine.

[0002]

2. Description of the Related Art FIG. 4 is a side view of a conventional crawler moving type general-purpose pile driver. As shown in FIG. 4, the pile driver 1 is provided with a leader 5 vertically on the front part, and a hammer 7 is attached from a top sheave 6 provided on the top of the leader 5 via a rope 2a. Lee
Suspended along Da 5. Further, the pile driving machine 1 is provided with a rope 3a for lifting a pile, and the winch 3 for winding the rope 3a and the winch 2 for winding the rope 2a are mounted on the main body.

When performing a pile driving operation using the conventional pile driving machine 1, first, the hammer 7 is lifted by the winch 2 to the upper portion of the reader 5, and then the rope 3a is placed on the pile 8 placed on the ground. And the pile 8 is pulled up by the winch 3, and the head of the pile 8 is inserted into the cap portion 7a at the lower end of the hammer 7. Then, as shown in the drawing, the hammer 7 and the pile 8 are lifted, the lower end of the pile 8 is separated from the ground, and the lower end of the pile 8 is positioned at the driving position in the suspended state.

As a conventional pile guiding device applied to a large pile driving ship, there is a pile driving device attached to a leader as shown in Japanese Utility Model Laid-Open No. 12541/1992. The device is intended to hold the pile so that the suspended pile is stable even if the pile driving ship is shaken by waves or the like, and the positioning of the pile is performed by moving the ship.

[0005]

In the case of the conventional positioning method shown in FIG. 4, when the pile 8 is separated from the ground, the pile 8 does not become vertical due to the gravity center of the pile and is hung obliquely as shown in FIG. It is necessary for three to three workers to manually push the lower end of the pile 8 to position it, which results in poor work efficiency, and the placement position cannot be accurately determined.
If it deviates from "a", there is a risk of causing a personal injury, which is very dangerous. Furthermore, if the ground at the driving position is soft, the ground will not support the pile unless the pile is driven to a certain depth.
However, there is also a problem that the vertical accuracy of the pile 8 is deteriorated due to the inclination.

On the other hand, in the guide device disclosed in Japanese Utility Model Laid-Open No. 4-12541, the pile to be driven has to be moved to the center of the guide device by using a special winch or a special pile suspender. However, the effect could not be expected even if it was applied for positioning in the pile driving work with a general-purpose pile driving machine on land.

In view of the above circumstances, the present invention is capable of efficiently, accurately and safely positioning the lower end portion of the pile at the driving position when the pile is driven on the ground, and drives the pile with high vertical accuracy. An object is to provide a positioning device and method for a pile that can be installed.

[0008]

In order to achieve the above object, a pile positioning apparatus of the present invention comprises a plurality of links in which each link is horizontally rotatably connected to the left and right of the lower end of the leader of the pile driver. Of the pile holder member, and each pile holder member is provided with a pile pressing roller for abutting the side surface of the pile, and is wound on at least one pile holder member by a winch mounted on the pile driver body. A guide device for guiding the rope that pulls the piles is attached.

In the pile positioning method of the present invention, a plurality of link type pile holder members in which each link is horizontally rotatably connected are attached to the left and right of the lower end of the leader of the pile driver.
Each pile holder member is attached with a pile pressing roller to be brought into contact with the side surface of the pile, one pile holder member is closed and the other pile holder member is opened, and the pile holder member is mounted on the pile driver main body. A rope wound by a winch is connected to a pile and guided by a guide device provided on the one pile holder member, and the rope is positioned between two pile pressing rollers on the one pile holder member. It is characterized in that the pile is pressed against these rollers and positioned by being wound up and wound.

[0010]

The pile positioning device of the present invention has the above-mentioned structure and is mounted on the main body of the pile driver by opening one of the pile holder members attached to the left and right ends of the lower end of the leader of the pile driver. By connecting a rope wound around an arbitrary winch to the pile and winding the rope and pulling the pile to the driving position, the pile can be positioned without requiring human power. In the pile positioning method of the present invention, the rope is guided so that the rope is located between the plurality of pile pressing rollers when viewed from above, and one side surface of the pile is brought into contact with the plurality of pile pressing rollers. Are positioned in the correct position.

[0011]

1 is a plan view of an embodiment of a pile positioning apparatus according to the present invention, FIG. 2 (A) is a view taken in the direction of arrow F of FIG.
(B) is a plan view showing the right side pile holder member in a state where the first link and the second link are opened in FIG. 1, and FIG. 3 is a side view of a pile driver equipped with the positioning device. Figure 3
As shown in FIG. 1, the pile driving machine 1 is provided with a lower end leader 5a at the lowermost end of the reader 5, the lower end leader 5a is equipped with a positioning device A, and the positioning device A is used to lower the lower end of the pile 8. The part is held and positioned. Here, 4a is a pile pulling lo
Numerals 4 and 4 are existing accessory winches mounted on the main body of the pile driver 1 and are also used for pulling the pile. In FIG. 3, the same reference numerals as those in FIG. 4 described above indicate parts or portions having equivalent functions.

As shown in FIGS. 1 and 2A, the positioning device A according to the present invention has brackets 9a and 9b mounted on the left and right mounting frames 5b and 5c of the lower end reader 5a.
Further, it has a structure in which the pile holder members 1A and 1B are pinned so as to be horizontally rotatable. Right and left pile holder member 1
A and 1B are first links 10 mounted horizontally on the brackets 9a and 9b by hydraulic cylinders 11a and 11b around pins 20a and 20b.
a, 10b and pin 2 on the first links 10a, 10b
It is configured as a two-link type with a second link 12a mounted so as to be horizontally rotatable around 1a and 21b.
Further, the first links 10a and 10b are provided with closed position inner pin holes 23a and 23b and an open position outer pin hole 24.
a and 24b are respectively provided, and the second link fixing pin 22a is inserted into and fixed to the inner pin holes 23a and 23b, so that the second links 12a and 12b are illustrated with respect to the first links 10a and 10b. It can be fixed in the closed position as shown in FIG. 1, and the pins 22a, 2 can be inserted into the outer pin holes 24a, 24b.
By inserting and fixing 2b, the second link 12
It is configured to fix a and 12b in the open position.

The brackets 9a and 9b are shown in FIG.
As represented by 9a in FIG.
With the bolt 18 and the nut washer 17, the mounting frame 5
The brackets 9a and 9b are mounted on b and 5c so that their positions can be adjusted in the arrow Z direction, and the positions of the brackets 9a and 9b can be adjusted with respect to the lower end reader 5a. As a result, even if the type of the hammer 7 mounted on the leader 5 changes, the pile holder member 1
The center positions of A and 1B (the centers of the inscribed circles of the four pile pressing rollers 13 described later) can be adjusted.

Roller brackets 14 are fixed to the first links 10a and 10b and the second links 12a and 12b, respectively, and the arms 25 are fitted to the roller brackets 14 so that the position of the pile 8 in the radial direction can be adjusted. Then, the pile pressing roller 13 is attached to the tip of each arm 25, and the pile pressing roller 13 is fixed to the diameter of the pile 8 by adjusting the position of the arm 25 with respect to the roller bracket 14 and fixing the arm 25 with the pressing bolt 14. The amount of protrusion is adjusted according to.

Reference numeral 15 denotes a guide device for relaying the pile pulling rope 4a from the winch 4 and guiding it to the pile 8.
4 rolls in total, 2 each in the vertical and horizontal directions
By letting the rope 4a pass through between 5a, the angle of the inlet and outlet of the rope 4a in the vertical and horizontal directions can be freely adjusted. In the present embodiment, the case where the guide device 15 is provided at one place on the first link 10b has been described, but the pile pulling rope 4a is reasonably arranged according to the structure of the pile driver.
A plurality of rollers may be provided so that the roller 1
Instead of 5a, a guide block having a smooth surface may be used. Further, 16 is a fixing metal fitting for connecting the pile holder member 1A and the pile holder member 1B by the pin 26, and 4b is a pile 8
Auxiliary rope to be hung around.

Next, the work of positioning the pile 8 will be described. First, according to the size of the pile 8, the roller 1 is mounted so that the pile 8 is securely held by the left and right holder members 1A and 1B.
Adjust the position of 3 in the radial direction of the pile. Further, when changing the hammer 7 to be used, the front and rear positions of the brackets 9a and 9b are adjusted so that the position right below the striking center of the hammer 7 matches the center of the pile 8 (when the pile is piled vertically). Keep it.

As described above, the pile 8 is hoisted by the rope 3a, and the lower end of the pile 8 is tilted from the ground so that the lower end of the pile 8 is tilted as shown in FIG. First, as shown in FIG. 1, for opening and closing the first link 10a on the opposite side (right side) of the side (left side) on which the guide device 15 is provided, the first link 10a for opening and closing is held by the positioning device A. Left and right pile holder members 1 by retracting the hydraulic cylinder 11a
Open so that the pile 8 can pass between A and 1B, and then
Auxiliary rope 4b is hung around the auxiliary rope 4b, and the auxiliary rope 4b and the pulling rope 4a are joined by a shackle or the like.

Subsequently, when the rope 4a is wound up by the winch 4, the pile 8 is pulled toward the pile holder member 1B on the left side. Here, the rope withdrawal part of the guide device 15,
The line connecting the center of the pile 8 after being held by the positioning device A is 2 of the pile holder member 1B on the left side when viewed from the upper surface.
Since it is set so as to be located between the two rollers 13 and 13, if the rope 4a is wound, the pile 8 will be the two rollers 1
The piles 8 are brought into contact with the piles 3 and 13, so that the centers of the piles 8 coincide with the preset driving center position. In this state, the right side hydraulic cylinder 11a is extended, the right side pile holder member 1A is closed to the position shown by the chain double-dashed line, and the pile holder members 1A and 1B are connected by the fixing bracket 16 and the pin 26 to hold the lower end portion 8b. To do. If more precise positioning is required, a fine slide operation of the pile slide machine 1 and a leader slide device (not shown) attached to the pile driver are combined.

After the driving of the piles 8 is completed, as shown in FIG. 2 (B), the first links 10a and 10b are opened and the second links 12a and 12b are opened to the maximum (in the figure, the right link is As a representative), the pile driver 1 is rotated to move the pile driver 1 to the next pile driving position. Here, since the device of the present embodiment is a two-link type, the turning radius when the pile holder members 1A and 1B are opened as shown in FIG. 2B (line R indicates the pile holder members 1A and 1B). (Showing the turning trajectory of the most distal end portion when opened) can be shortened, and the positioning device A does not collide with the pile 8 that has been placed immediately before during turning, and the pile driver 1 can be used for the next pile driving. It can be easily moved to the installation position.

As described above, in the pile positioning apparatus according to the present invention, the winch 4 installed on the pile driving machine 1 does not depend on human power.
Drive the lower end of the pile 8 to the driving center position,
Since the lower end portion is held by the pile pressing roller 13, the lower end portion can be easily, accurately and safely positioned at the driving position,
Further, since the lower end portion of the pile 8 is held during the driving, the pile 8 can be driven with high vertical accuracy. In addition, since the lower end of the pile 8 is held even during driving, the pile can be driven with high vertical accuracy and can be driven without bending even when the ground is soft. Pile driving can be performed stably.

Further, since the positions of the pile holder members 1A, 1B can be adjusted by adjusting the positions of the brackets 9a, 9b, even if the type of the hammer 7 is changed and the center position of the pile 8 is changed, the positioning device of the present example. Can be dealt with. In addition, the pile presser roll
Since the protrusion amount of the la 13 can be adjusted according to the diameter of the pile 8 to be placed, the diameter of the pile 8 can be changed by the positioning device of this example.

Incidentally, The number of links of the pile boulder members 1A and 1B is not limited to two and may be three or more. The guide device 15 for the rope 4a may be provided on both the left and right sides.

[0023]

According to the first aspect of the present invention, the pile pulling rope hung on the lower end of the pile is pulled to the driving center position by the winch installed in the pile driving machine, and the lower end of the pile is held by the pile pressing roller. Therefore, the work of positioning the lower end of the pile at the driving position can be performed efficiently and accurately. Also,
Since it does not depend on human power, labor is reduced and work safety is significantly improved. In addition, since the lower end of the pile is held even during driving, the pile can be driven with high vertical accuracy and can be driven without bending even when the ground is soft. Striking can also be performed stably.

According to the second aspect, since the position of the pile holder member can be adjusted, when the type of the hammer mounted on the leader is changed, the center position of the pile can be easily changed according to the type of the hammer.

According to the third aspect, since the protrusion amount of the pile pressing roller can be adjusted, it is possible to easily cope with the change of the pile diameter by adjusting the protrusion amount according to the diameter of the pile to be driven.

According to the fourth aspect, since the pile side surface is brought into contact with the plurality of pile pressing rollers only by pulling the pile with the pile pulling rope, the center of the pile is automatically adjusted to the target position. The alignment work becomes extremely easy.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a pile positioning device according to the present invention.

2 (A) is a view taken in the direction of arrow F in FIG. 1, and FIG. 2 (B) is a plan view showing a state in which the first link and the second link in FIG. 1 are opened.

FIG. 3 is a side view of a pile driver equipped with the embodiment.

FIG. 4 is a side view of a conventional crawler moving type general-purpose pile driver.

[Explanation of symbols]

 1 Pile driver 1A, 1B Pile holder member 2, 3, 4 winch 2a, 3a, 4a, 4b Rope 5 Leader 5a Lower end lead 5b, 5c Mounting frame 7 Hammer 7a Cap portion 8 Pile 9a, 9b Brackets 9e, 9f Oblong holes 10a, 10b First links 11a, 11b Hydraulic cylinders 12a, 12b Second links 13 Pile press roller 14 Roller bracket 14a Press bolt 15 Guide device 15a Roller 16 Fixing bracket 17 Nut washer 18 Bolt

Claims (4)

[Claims] 1. A multi-link type pile holder member in which links are horizontally rotatably connected to each other is attached to the left and right of a lower end of a leader of a pile driver, and each pile holder member is attached to a side surface of the pile. A pile holding roller to be brought into contact is attached, and at least one of the pile holder members is provided with a guide device for guiding a rope which is wound up by a winch mounted on the main body of the pile driver and pulls the pile. Positioning device. 2. A bracket according to claim 1, wherein a bracket is attached to a mounting frame provided at a lower end portion of the reader so as to be positionally adjustable,
A pile positioning device, wherein the pile holder members are attached to the brackets. 3. The pile positioning device according to claim 1, wherein the pile holding roller is attached to the pile holder member so as to adjust a projecting position to the side surface of the pile. 4. A multi-link type pile holder member in which each link is horizontally rotatably connected is attached to the left and right of the lower end portion of the leader of the pile driver, and each pile holder member is attached to the side surface of the pile. Attach the pile pressing roller to contact, keep one pile holder member in the closed state and the other pile holder member in the open state, connect the rope wound by the winch mounted on the pile driver main body to the pile, And by guiding the rope to a guide device provided on the one pile holder member, by winding the rope by positioning the rope between a plurality of pile pressing rollers on one pile holder member when viewed from the upper surface, A method for positioning a pile, comprising positioning the pile by contacting these rollers.