JPH0762348B2 - Chuck mechanism for pile press-in / pull-out machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a pile press-fitting method in which an existing pile press-fitted into the ground is clamped by a clamp of a pile press-in / pull-out machine and a new pile is press-fitted into the ground by connecting to the existing pile. The present invention relates to a chuck mechanism of a drawing machine.

[0002]

2. Description of the Related Art Generally, a chuck mechanism is provided at a mast front end of an upper portion of a base of a pile pull-out machine so as to be able to move up and down, and is composed of a substantially cylindrical main body and a revolving structure which is rotatably mounted in the main body. To be done. A pile insertion hole that communicates vertically is formed in the revolving structure, a fixed claw is provided in the pile insertion hole, and a movable claw is provided at a position facing the fixed claw so as to be able to move forward and backward. The fixed claw and the movable claw are for sandwiching the pile loaded in the pile insertion hole. Therefore, in order to reduce the occurrence of a slipping phenomenon when the piles are clamped, an uneven slip stopper is formed on the clamping surfaces of the fixed claw and the movable claw.

To press-fit a heavy anticorrosion pile (for example, heavy anticorrosion steel sheet pile) with this conventional chuck mechanism, the following procedure is followed. First, the protection plate is lifted by a crane and put into the pile insertion hole of the revolving structure of the chuck mechanism. Next, the heavy anticorrosion pile is lifted up by a crane, and the heavy anticorrosion pile is erected in the revolving body so that the covering surface side of the heavy anticorrosion pile contacts the protective plate. After this installation is completed, the heavy-corrosion protection pile and the protection plate are simultaneously clamped by the fixed claw and the movable claw, and press-fitting of the heavy-duty protection pile is started. After the press-fitting work is completed, the protective plate is lifted by a crane and removed from the revolving body of the chuck mechanism. Then, the direction of the protective plate is changed in correspondence with the direction of the covering surface side of the heavy anticorrosion pile to be press-fitted, and the protective plate is re-inserted again into the revolving body, and the above-described work is repeated.

[0004]

However, in the conventional chuck mechanism, since the gripping surfaces of the fixed claw and the moving claw are formed with slip stoppers, if the heavy anticorrosion coated surface of the heavy anticorrosion pile is randomly grasped, It causes scratches and reduces the anticorrosion function. Therefore, it is necessary to separately prepare a protective plate with a smooth surface to protect the coated surface, and insert it between the chuck contact surface and the coated surface each time it is inserted from the chuck upper part of the revolving structure as described above. is necessary.

In particular, in heavy-duty anticorrosion steel sheet piles, since the inclination directions of the webs are connected alternately, it is preferable that the coating surface also has a concave surface (ventral side surface) and a convex surface (backside surface). Use alternately. Therefore, it is necessary to insert the protective plate into the pile insertion hole in consideration of which side the coated surface is for each press-fitting heavy corrosion-resistant steel sheet pile, and the removal of the protective plate must be repeated for each press-fitting work. Needed. The present invention has been made to solve such a problem, and a chuck of a pile press-fitting / extracting machine that can be continuously built without damaging the covering surface of the heavy corrosion-resistant pile without using a protective plate. It is intended to provide a mechanism.

[0006]

In order to achieve the above-mentioned object, a chuck mechanism of a pile press-fitting / extracting machine according to the present invention comprises a movable pawl and a fixed pawl for a heavy-corrosion pile having a smooth clamping surface in a pile insertion hole. And the opposing claws, the extension claws for the ordinary piles are arranged slightly behind the holding surface of the fixed claws for the heavy-duty anticorrosion piles, and the movable claws for the ordinary piles are provided at the positions facing the extension claws. It is characterized by that. Further, the chuck mechanism of the pile press-fitting / extracting machine of the present invention is provided with a movable claw for the non-coated surface of the heavy corrosion-resistant pile in the pile insertion hole, and is fixed at a position facing the movable claw for the coated surface of the heavy corrosion-resistant pile. The claw is provided, the fixed claw for the non-coated surface is provided below the movable claw for the coated surface, and the movable claw for the coated surface is provided below the fixed claw for the uncoated surface. I am trying.

[0007]

The chuck mechanism of the pile press-fitting / pulling machine of the present invention acts as follows when sandwiching a heavy anticorrosion pile or a normal pile. A heavy anticorrosion pile is installed in the pile insertion hole, the movable pawl for the heavy anticorrosion pile is moved to the fixed pawl side, and the heavy anticorrosion pile is clamped by the smooth clamping surface between the movable pawl and the fixed pawl. Alternatively, extend the extension pawls for ordinary piles that are located slightly behind the holding surface of the fixed pawls for heavy-duty anticorrosion piles, move the movable pawls for ordinary piles to the fixed pawl side, and then move the movable pawls and fixed pawls. Clamp the ordinary pile as usual. In the case of heavy-duty anticorrosion piles with a coated surface formed on the ventral side of the web, the movable claw for the upper coated surface is moved to the fixed claw side for the uncoated surface and clamped, and the coated surface is placed on the back side of the web. In the case of the heavy-duty anticorrosion pile in which is formed, the lower movable claw for the covering surface is moved to the side of the fixed claw for the non-covering surface and is clamped. Also, when the covered surface is formed on the ventral side of the web, insert the flange of the heavy-duty anticorrosion pile into the flange insertion part on the fixed claw side of the pile insertion hole, and move the movable claw for the non-covered surface to the covered surface. Move to the fixed claw side and clamp. Alternatively, if a coated surface is formed on the back side of the web, insert the flange of the heavy-duty anticorrosion pile into the flange insertion part on the movable claw side of the pile insertion hole, and use the movable claw for the uncoated surface for the coated surface. Move to the fixed claw side and clamp.

[0008]

1 is a vertical sectional side view of a chuck mechanism of a pile press-fitting / pulling machine according to a first embodiment of the present invention, and FIG.
II cross-sectional view and FIG. 3 are III-III cross-sectional views of FIG. The chuck mechanism 1 integrally includes separate chuck mechanisms for a covered pile such as a heavy-corrosion-proof steel sheet pile and a normal pile (a pile not coated with heavy-corrosion protection). It is composed of a cylindrical main body 2 and a revolving structure 3 mounted in the main body 2 so as to be rotatable.

A pile insertion hole 4 having a substantially Ω-shaped plan is formed in the revolving structure 3, and a movable pawl 5 and a fixed pawl 7 for heavy corrosion protection piles are provided in the pile insertion hole 4 so as to face each other. . The fixed claw 7 is provided in a vertical direction at a position where the back side (convex surface) of the web of the heavy corrosion protection pile P abuts, and the movable claw 5 is vertically provided at a position where a ventral side surface (concave surface) of the web of the heavy pile P abuts. Set up. Of these, the movable claw 5 is configured to be movable to the fixed claw 7 side via the fluid pressure cylinders 6, 6. Further, the sandwiching surfaces 5a, 7a of the movable claw 5 and the fixed claw 7 for the heavy anticorrosion pile P are both finished smooth so as not to damage the covering surface Pf of the heavy anticorrosion pile P.

Further, in this embodiment, a movable claw 8 for the ordinary pile K is provided at the center of the movable claw 5 for the heavy corrosion-proof pile P, and a normal pile is provided at the center of the fixed claw 7 for the heavy corrosion-proof pile P. Extension claw 9 for K
To provide. The movable claws 8 and the extension claws 9 for the ordinary pile K are respectively provided with uneven holding surfaces 8a and 9a. Ordinary pile K
The extension claw 9 for use is provided so as to be slightly extendable via the fluid pressure cylinder 10, and the holding surface 9a of the extension claw 9 is normally fixed to the fixed claw 7.
It is located slightly deeper than the holding surface 7a. The movable claw 8 for the ordinary pile K is movably provided to the extension claw 9 side via the fluid pressure cylinder 11 provided between the fluid pressure cylinders 6 and 6 described above.

Since this embodiment is constructed as described above, it works as follows when the heavy corrosion prevention pile P or the ordinary pile K is clamped. When sandwiching the heavy anticorrosion pile P, the fluid pressure cylinders 6, 6 are operated to move the movable claw 5 to the fixed claw 7 side, and the movable claw 5 and the fixed claw 7 are clamped. At that time, since the heavy anticorrosion pile P is uniformly sandwiched by the entire sandwiching surfaces 5a and 7a, it can be reliably sandwiched and the press-fitting / pulling-out work can be reliably performed. Further, the holding surfaces 5a, 7 of the movable claw 5 and the fixed claw 7 are
Both a are finished to be smooth, and the extension claw 9 for the ordinary pile K does not touch the covering surface Pf. Therefore, it is less likely to damage the heavy anticorrosion pile P regardless of which side of the uneven surface the covering surface Pf is on.

When sandwiching the ordinary pile K, the fluid pressure cylinder 10 is operated so that the sandwiching surface 9a of the extension claw 9 is heavy-corrosion pile P.
The fixed claw 7 for use is slightly projected from the holding surface 7a. Also,
Operates the fluid pressure cylinder 11 to move the movable claw 8 for the ordinary pile K.
Is moved to the extension claw 9 side, and is clamped by the movable claw 8 and the extension claw 9. Since the movable claw 8 and the extension claw 9 for the ordinary pile K are formed with the concavo-convex clamping surfaces 8a and 9a, the ordinary pile K can be reliably clamped and the press-fitting / pulling-out work can be performed as usual. As described above, the present embodiment has an effect that both the normal pile K and the heavy anticorrosion pile P can be sandwiched depending on the situation.

FIG. 4 is a vertical sectional side view of a chuck mechanism of a pile press-fitting / pulling machine according to a second embodiment of the present invention, FIG. 5 is a lateral sectional view taken along line VV of FIG. 4, and FIG. 6 is VI-VI of FIG. FIG. This chuck mechanism 21 is a movable claw 2 for the heavy anticorrosion pile P.
5, fixed claw 27, movable claw 28 and extension claw 30 for ordinary pile K
It has a pair of and. The same components as those in the first embodiment are designated by the same reference numerals to simplify the description.

A movable pawl 25 and a fixed pawl 27 for the heavy anticorrosion pile P are provided in the pile insertion hole 4 of the revolving structure 3 so as to face each other, and below the movable pawl 25 and the fixed pawl 27, the movable pawl for the normal pile K is provided. A claw 28 and an extension claw 30 are provided. The movable pawl 25 for the heavy corrosion protection pile P is configured to be movable to the fixed pawl 27 side via the fluid pressure cylinder 26, and the movable pawl 28 for the ordinary pile K is moved to the extension pawl 30 side via the fluid pressure cylinder 29. Make it possible. Further, the extension claw 30 for the ordinary pile K is provided so as to be extendable to the movable claw 28 side via the fluid pressure cylinder 31, and the extension claw 30 is normally located slightly deeper than the fixed claw 27 for the heavy corrosion prevention pile P. I am letting you.

Also in this embodiment, the holding surfaces 25a, 27a of the movable claw 25 and the fixed claw 27 for the heavy anticorrosion pile P are both finished smooth so as not to damage the covering surface Pf of the heavy anticorrosion pile P. The movable claw 28 and the extension claw 30 for the normal pile K are respectively formed with uneven holding surfaces 28a and 30a. Also in this embodiment, the movable claw 25 is moved to the fixed claw 27 side by operating the fluid pressure cylinder 26, and the heavy corrosion protection pile P can be uniformly clamped by the entire clamping surfaces 25a, 27a of the movable claw 25 and the fixed claw 27. Alternatively, the fluid pressure cylinder 31 is operated to cause the extension claw 30 to slightly project from the holding surface 27a of the fixed claw 27 for the heavy corrosion protection pile P, and the fluid pressure cylinder 29 is activated to move the movable claw 28 to the extension claw 30 side. As a result, the movable pile 228 and the extension jaw 30 can hold the normal pile K.

Since the holding surfaces 25a, 27a of the movable claw 25 and the fixed claw 27 of this embodiment are also finished to be smooth, there is little risk of damaging the heavy corrosion prevention pile P during the holding. In addition, the movable claw 28
Since the elongated claws 30 are formed with the concavo-convex holding surfaces 28a and 30a, the ordinary pile K can be surely held as in the first embodiment, but this embodiment is more effective than the first embodiment. It can be miniaturized.

FIG. 7 is a vertical sectional side view of a chuck mechanism of a pile press-fitting / pulling machine according to a third embodiment of the present invention, and FIG. 8 is a V of FIG.
III-VIII line cross-sectional view and FIG. 9 shows IX-I of FIG.
It is an X-ray cross-sectional view. The present embodiment is a chuck mechanism 32 dedicated to heavy anticorrosion piles. This chuck mechanism 32 has a pile insertion hole 4
A movable claw 33 for sandwiching the covered surface Pf side of the heavy corrosion-resistant pile P is provided inside, and a fixed pawl 35 for sandwiching the non-coated surface Pn side of the heavy corrosion-resistant pile P is provided at a position facing the movable pawl 33. It is provided.

Further, a fixed claw 36 for sandwiching the non-covered surface Pn side of the heavy corrosion-proof pile P is provided below the movable claw 33, and a covered surface Pf of the heavy corrosion-proof pile P is provided below the fixed claw 35.
A movable claw 37 for holding the side is provided. The upper movable claw 33 can be extended to the fixed claw 35 side by the fluid pressure cylinder 34, and the lower movable claw 37 can be extended to the fixed claw 36 side by the fluid pressure cylinder 38. The movable claws 33 and 37 finish the holding surfaces 33a and 37a smoothly so as not to damage the covering surface Pf of the heavy anticorrosion pile P.
The concave and convex sandwiching surfaces 35a and 36a are formed on 36.

Using this embodiment thus constructed,
When sandwiching the heavy anticorrosion pile P having the covering surface Pf formed on the ventral side surface, as shown in FIG. 8, only the fluid pressure cylinder 34 is operated. By this fluid pressure cylinder 34, the movable claw 33 presses the covering surface Pf side, and the fixed claw 35 abuts the non-covering surface Pn side to reliably sandwich the heavy corrosion prevention pile P. Also,
When sandwiching the heavy anticorrosion pile P having the covering surface Pf formed on the back side surface, as shown in FIG. 9, only the fluid pressure cylinder 38 is operated to press the covering surface Pf side with the movable claw 37 to fix it. The claw 36 is brought into contact with the non-covered surface Pn side to reliably sandwich the heavy corrosion-resistant pile P.

As described above, according to this embodiment, the coated surface Pf
The heavy anticorrosion pile P can be reliably grasped regardless of whether it is formed on the back side or the ventral side of the web. Therefore, the upper movable claw 33 and the lower movable claw 37 are alternately used each time one heavy corrosion protection pile P is press-fitted, so that the heavy corrosion protection pile row P ... Can be constructed.

[0021] The movable pawl 5 and the fixed claws 7 of the first embodiment,
Clamping surfaces 5a , 7a, 25a of movable claw 25 and fixed claw 27 of the second embodiment, and movable claw 33 and movable claw 37 of the third embodiment.
The materials 27a, 33a, and 37a may be made of a material such as iron and finished as they are, or may be finished by coating or pasting the same material or the like as the coating material of the heavy anticorrosion pile P on the surface thereof. Further, although the heavy anticorrosion pile P sandwiched in each of the above-described embodiments is a heavy anticorrosion steel sheet pile, the heavy anticorrosion pile P is not limited to this and can be applied to a heavy anticorrosion pile having an H-shaped section.

[0022]

As described above, according to the chuck mechanism of the pile press-fitting / pulling machine of the present invention, it is not necessary to separately prepare a protective plate and load it into the insertion hole. Therefore, the working time can be significantly reduced.
Moreover, regardless of whether the coating surface of the heavy-duty anticorrosion pile is concave (belly side) or convex (back side), it is possible to securely sandwich and continuously build it without damaging it. Is. Therefore, the constructed heavy anticorrosion pile row can maintain a high anticorrosion function.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a chuck mechanism of a pile press-fitting / pulling machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a vertical sectional side view of a chuck mechanism of a pile press-fitting / pulling machine according to a second embodiment of the present invention.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a vertical sectional side view of a chuck mechanism of a pile press-fitting / pulling machine according to a third embodiment of the present invention.

8 is a sectional view taken along line VIII-VIII of FIG.

9 is a sectional view taken along line IX-IX in FIG.

[Explanation of symbols]

1, 21, 32, 41 Chuck mechanism of pile press-in / pull-out machine 4 Pile insertion hole 5, 8, 25, 28, 33, 37, 45 Movable claw 7 , 27, 35, 36, 47 Fixed claw 9, 30 Extension claw P Heavy-duty anti-corrosion pile Pf Coated surface Pn Non-coated surface K Normal pile

Claims (2)

[Claims] 1. A movable claw for a heavy anticorrosion pile having a smooth clamping surface and a fixed claw are provided to face each other in the pile insertion hole, and the fixed claw for the heavy anticorrosion pile is normally provided slightly behind the clamping surface. A chuck mechanism for a pile press-fitting / extracting machine, in which an extension claw for a pile is arranged and a movable claw for a normal pile is provided at a position facing the extension claw. 2. A movable claw for the covering surface of the heavy anticorrosion pile is provided in the pile insertion hole, a fixed claw for the non-covering surface of the heavy anticorrosion pile is provided at a position facing the movable claw, and the covering surface is also provided. The chuck mechanism of the pile press-fitting / extracting machine, in which a fixed claw for an uncoated surface is provided below or above the movable claw, and a movable claw for a coated surface is provided below or above the fixed claw for the uncoated surface.