JP3135111B2 - Method for chucking a pile from the side and apparatus for chucking the pile from the side - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chucking method and a chucking device for holding a pile in a so-called lateral gripping form (that is, from the side of the pile) in order to drive or pull out the pile. It is.

[0002]

2. Description of the Related Art FIGS. 4A and 4B show a method for driving a pile or pulling out a pile, wherein FIG. 4A is a schematic diagram showing the whole construction site, and FIG. 4B is a sheet as a pile. A schematic plan view of a state where a pile is chucked, (C) is a schematic plan view of a state where an H-shaped steel is chucked as a pile,
(D) is a schematic plan view showing a state where a steel pipe or a concrete pile as a pile is chucked. To drive the pile, the pile 1 is gripped by the pile chuck 2 as shown in FIG. The pile chuck 2 is installed below the exciter 3. When the exciter 3 is lifted by the crane 4, the pile 1 is in a vertical posture. When the pile 1 is lifted and lowered on the ground 5 by the crane 4, and the pile 1 is vibrated by operating the vibration exciter 3, the pile 1 is further suspended. It is penetrated into the ground by gravity load including the shaker 3. When removing the pile, the vibration exciter 3 is operated as described above to apply vibration to the pile 1,
It is lifted by the crane 4 and pulled out.

Now, as shown in FIG. 4A, if there is an aerial obstacle 6 above the punching point of the pile 1, the height of the workable space is limited. Even if the joint pile technique is used, the length dimension L of the pile 1 in each pile punching operation is as follows:
Needless to say, it must be smaller than the ground height H of the aerial obstacle 6. However, in the example of FIG. 4A, even if H> L, the pile 1
Can not be lifted. When the pile cannot be lifted by the crane, the pillar-shaped leader 7 is set up as shown by the imaginary line, and the pile 1 is chucked by the pile chuck 9 attached to the exciter 8 moved up and down by the leader 7. It is conceivable to punch.
When such a construction method is adopted, the above-mentioned pile chuck 9 is used for the pile 1.
It is necessary to have a function of chucking the pile 1 from the side of the pile (so-called horizontal gripping of the pile).

(See FIG. 4 (B).) To chuck the sheet pile 11 from the side, the sheet pile 11 is gently surrounded by a frame 10 having a U-shaped horizontal section, and is drawn by an imaginary line. The pair of jaws j pinch each other (driving means for pinching will be described later with reference to FIG. 6). For convenience of description, the length dimension D of the two U-shaped parallel sides will be referred to as the depth, and the length dimension W of the central side of the U-shape as the width. FIG. 4C shows a case where the H-shaped steel 12 is chucked from the side, and FIG. 4C shows a case where the steel pipe pile or the concrete pile 13 is chucked from the side.
(D). 5A and 5B are views for explaining the pile punching method in the case where an existing obstacle such as a structure is present, and FIG. 5A is a schematic plan view illustrating a state where an H-shaped steel is punched, and FIG. () Is a schematic plan view illustrating a state in which sheet piles are arranged and driven, or a sheet pile arranged in a row is pulled out, and (C) is an explanatory view of a planar shape of a U-shaped frame. (See FIG. 5 (A).) If the H-section steel 12 is to be punched at a point apart from the building 19 by a distance α, it must be clear that W / 2 <α W2 <α. Therefore, the U-shaped frame 10
It is a defect that the accessory protrudes in the width direction from.

(See FIG. 5 (B)) A large number of sheet piles 1
When 1a to 11f are connected to each other and arranged in a row, the U-shaped frame needs to be inverted like 10A drawn by a solid line and 10B drawn by a chain line. In such a case, in order to make it possible to work close to the building 19, FIG.
As shown in (C), D ≒ W, the radius r of a circle circumscribing the U-shaped frame 10 is as small as possible, and
It is desirable that nothing protrudes outside the circle having the radius r.

[0006]

FIG. 6 is a block diagram of FIG.
(B), (C), and (D) show a conventional example of a mechanism for driving the jaws. FIG. (A) is a schematic diagram of a mechanism for driving the jaws via a lever, and (B) of FIG. () Is a schematic diagram of a mechanism for driving a movable jaw facing a pair of fixed jaws by a hydraulic cylinder. (See FIG. 6A.) In the mechanism of this embodiment, a movable jaw 16b is attached to a lever 15 that is tilted by a hydraulic cylinder 14, and the movable jaw 16b
A pile (not shown) is sandwiched between the fixed jaw 16a and the fixed jaw 16a. In such a mechanism, the width W ₁ and depth D ₁ of the device is increased. (See FIG. 6 (B)) At the tips of two parallel sides of the U-shaped frame 10, hydraulic cylinders 17 parallel to the center side of the U-shape are installed so as to expand and contract inward, respectively. A movable jaw 16 b is attached to the tip of the piston rod of each hydraulic cylinder 17. In this kind of mechanism projects a pair of hydraulic cylinders 17 by the respective dimension E in the width direction, the total width W ₂ is increased. (See FIG. 6 (C)) A fixed jaw 16a is attached to one of the two parallel sides of the U-shaped frame 10, and the other hydraulic cylinder 18 on the two parallel sides is installed. The movable jaw 16b is attached. In such a configuration, the hydraulic cylinder 1
8 protrudes in the width direction of the U-shaped frame, the overall width W ₃ larger. The present invention has been made in view of the above-described circumstances, and there is no possibility that the U-shaped frame may protrude to the side or increase the depth of the U-shaped frame in the depth direction. It is an object of the present invention to provide a chucking method and a chucking device capable of performing a punching work close to a ground obstacle.

[0007]

The basic principle of the present invention created to achieve the above object will be briefly described with reference to FIG. 1 corresponding to the embodiment. Assuming that the frame 20 is used, at least two cylinders for chucking the pile are arranged on two parallel sides of the U in parallel with the center side of the U. By arranging the two cylinders in parallel in this way, the strokes of the two cylinders are summed,
The required stroke (total value) can be obtained with a relatively short cylinder. For convenience of explanation, a thick cylinder 21 that generates a large force necessary for chucking a pile is referred to as a pile chuck cylinder, and the pile chuck cylinder is parallel to the central side of the U-shape (in the width direction of the U-shaped frame).
The elongated cylinder 22 to be moved is called a slide cylinder.

According to the first aspect of the present invention, there is provided a method of chucking a pile for driving or pulling a pile, the method comprising: A slide block guided in parallel with the central side of the character is provided, and a hydraulic pile chuck cylinder that expands and contracts in parallel with the central side is mounted on the slide block.
The pile is moved toward the inside of the U-shaped concave portion, and the pile chuck cylinder is extended toward the inside of the U-shaped concave portion to chuck the pile. According to the first aspect of the present invention described above, since the stroke of the pile chuck cylinder is supplemented by the stroke of the slide cylinder, the pile can be chucked even if the pile chuck cylinder is relatively short. It can be configured such that the cylinder does not protrude to the side.

According to a second aspect of the present invention, in addition to the first aspect, the slide block is moved by a hydraulic cylinder. According to the second aspect of the present invention described above, since the slide block is driven by the hydraulic cylinder, the expansion and contraction of the pile chuck cylinder and the movement of the slide block can be operated by the same energy source (hydraulic source). The configuration of the source and the configuration of the operation system are simple, and the operation can be easily and reliably performed.

The structure of the invention according to claim 3 is the same as that of claim 1,
In addition to the configuration of the second aspect, after the slide block is moved toward the inside of the U-shape, before the extension of the pile chuck cylinder is completed, the slide block moves with respect to the U-shaped frame. Is stopped and locked. According to the third aspect of the present invention described above, even if the operation force of the means for moving the slide block is weak, the slide block is locked before the pile chuck exerts a large force. The locking means supports the reaction force of the chuck operation of the pile chuck, there is no danger that the slide block will be pushed back by the reaction force, and the pile can be strongly chucked with a stable force. it can.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the slide block and the U-shaped frame are fixed between the slide block and the U-shaped frame. The lock is performed by press-fitting a wedge with a hydraulic cylinder by a hydraulic cylinder, and the lock is released by pulling out the wedge. According to the invention of claim 4 described above, a large locking force can be obtained with a relatively small force by utilizing the boosting action of the wedge, and moreover, compared with various locking means such as bolts and pins. It can be operated quickly and easily and can be locked at any point. Further, since the wedge is press-fitted and pulled out by the hydraulic cylinder, it can be locked and unlocked by remote control using the same hydraulic source as the pile chuck cylinder.

According to a fifth aspect of the present invention, there is provided the configuration of the first to fifth aspects.
In addition to the configuration of the fourth aspect of the present invention, the pile is passed through the U-shaped opening of the frame, and the pile is positioned between two parallel sides of the U-shape. Before the chucking of the pile is completed, a reinforcing member is attached between the two ends of the U-shaped parallel sides of the frame, and the pile chuck cylinder extends to clamp the pile. It is characterized by preventing deformation of the frame in the direction in which the two parallel sides of the U-shape open due to reaction force at the time. According to the fifth aspect of the present invention described above, since the U-shaped frame does not have to be particularly sturdy, it can withstand the reaction force of the large clamping force of the pile chuck cylinder, so that the entire apparatus can be made lightweight. In addition, the pile can be strongly chucked, driven, and pulled out.

According to a sixth aspect of the present invention, a pile is driven,
Or a device that chucks the pile from the side for pulling out, a frame having a U-shaped horizontal cross section, and attached to at least one of two U-shaped parallel sides of the frame, A slide block guided in parallel with the U-shaped central side; and a slide block mounted on the slide block and arranged in parallel with the U-shaped central side, in the central concave portion of the U-shape. And a slide cylinder mounted on the slide block and driving the slide block back and forth in a direction parallel to the central side of the U-shape. It is characterized by being. According to the sixth aspect of the present invention described above, the slide block on which the pile chuck cylinder is mounted is driven by the slide cylinder in the same direction as the expansion / contraction operation of the pile chuck cylinder. The rod end
Based on the U-shaped frame, there is an operation stroke corresponding to the extension / contraction stroke of the pile chuck cylinder + the extension / contraction stroke of the slide cylinder. Therefore, even if the length of the pile chuck cylinder and the length of the slide cylinder are set to be relatively short, the tip of the piston rod of the pile chuck cylinder has an operating stroke necessary for chucking and releasing the pile. Is obtained. Since the length dimensions of the pile chuck cylinder and the slide cylinder are short, there is no possibility that these cylinders protrude in the width direction of the U-shaped cylinder.

According to a seventh aspect of the present invention, a pile is driven,
Or a device for chucking the pile from the side for pulling out, a frame having a U-shaped horizontal section, and at least one of two U-shaped parallel sides of the frame, The pile chuck cylinder is supported in parallel with the U-shaped central side and guided in parallel with the U-shaped central side, and is mounted on the frame. And a slide cylinder that reciprocates in a direction parallel to the central side of the shape. According to the invention of claim 7 described above,
The entire pile chuck cylinder is reciprocated in parallel with the center side of the U-shaped frame and expands and contracts in parallel with the center side, so the tip of the piston rod of the pile chuck cylinder is the A reciprocating stroke corresponding to "the sum of the telescopic stroke and the telescopic stroke of the slide cylinder". Therefore, the length of the pile chuck cylinder and the length of the slide cylinder are set relatively short so that these cylinders do not project to the side of the U-shaped frame. Thus, a reciprocating stroke required for chucking and releasing the pile can be obtained.

The structure of the invention according to claim 8 is the same as that of claim 6,
In addition to the configuration of the seventh aspect of the present invention, the slide block or the pile chuck cylinder is provided with a means for locking reciprocating motion parallel to a U-shaped central side of the cylinder. According to the invention of claim 8 described above, even if the operating force of the slide cylinder is relatively weak, the reaction force of the chuck force by the pile chuck cylinder is supported by the lock,
There is no possibility that the slide cylinder will be pushed back. Therefore,
The slide cylinder can be configured relatively thin,
Moreover, a stable and powerful pile chuck function can be obtained.

According to a ninth aspect of the present invention, in addition to the configuration of the eighth aspect, the locking means includes a member guided in parallel with a U-shaped central side and a member guided. The wedge-shaped member is press-fitted and pulled out in a direction substantially perpendicular to the guide direction, and a lock cylinder that reciprocates the wedge-shaped member in the press-fitting and pulling-out directions. According to the invention of claim 9 described above,
The lock for supporting the reaction force of the pile chuck cylinder and the release of the lock can be quickly performed by remote control.

According to a tenth aspect of the present invention, there is provided the configuration according to the sixth to sixth aspects.
In addition to the configuration of the invention of the ninth aspect, there is provided a reinforcing member for interconnecting the vicinity of the tip of the two parallel sides so as to prevent the two parallel sides of the U-shape of the frame from being deformed into an open shape. And, the above-mentioned reinforcing member has a detachable structure so as not to prevent the pile from entering or leaving the U-shaped concave portion,
Alternatively, it is a structure that can be opened and closed like a door. According to the tenth aspect of the present invention described above, there is no possibility that the U-shaped frame is deformed by the reaction force of the pile chuck cylinder, and the frame can be made lightweight.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an apparatus constructed to carry out a method for laterally chucking a pile according to the present invention.
FIG. 3 is a schematic cross-sectional plan view illustrating the embodiment, in which a right half of the drawing illustrates a state where the pile is chucked, and a left half of the drawing illustrates a state where the pile is released. Slide guides 24 are provided on two parallel sides of the U-shaped frame 20 in parallel with the center side of the U-shape, and the slide block B is slidably guided (specifically, the slide guides 24). The typical shape will be described later with reference to FIGS. 2 and 3). On the slide block B, a slide cylinder 22 and a pile chuck cylinder 21 are respectively mounted in parallel with the central side of the U-shape. The pile chuck cylinder 21 in the present embodiment is a hydraulic cylinder having a thickness dimension (piston area) capable of exerting a force for gripping the H-shaped steel 12 as a pile, and a slide cylinder 2.
Reference numeral 2 denotes a thin, fast-moving hydraulic cylinder that can move the slide block B without load. The tip of the piston rod 23 of the slide cylinder 22 is attached to a U-shaped frame 20, and the pile chuck cylinder 2
A movable jaw 16b for gripping and holding the H-shaped steel 12 is attached to the tip of the piston rod.

The slide block B in this embodiment (FIG. 1) is reciprocated in parallel with the central side of the U-shape by the same length as the operating stroke dimension of the slide cylinder 22, so that it is mounted on the slide block B. The movable jaw 16b attached to the tip of the piston rod of the pile chuck cylinder 21
The reciprocating drive is performed only by a size corresponding to the sum of the working stroke size of No. 2 and the working stroke size of the pile chuck cylinder 21 (parallel to the center side of the U shape). For this reason, when the pair of movable jaws 16b are operated in a direction in which they are separated from each other, the interval is greatly widened, and the H-shaped steel 12 does not hinder the ingress and egress of the concave portion of the U-shaped frame 20. Further, when the pair of movable jaws 16b are operated in a direction of approaching each other, it is possible to securely hold the H-section steel wedge (the central horizontal side of the H shape). In addition, as shown in the left half of FIG. 1, when the slide cylinder 22 and the pile chuck cylinder 21 are contracted, the movable jaw 16b projects into the U-shaped central recess of the U-shaped frame 20. And the cylinder bottom of the pile chuck cylinder 21 does not protrude to the side of the U-shaped frame 20, so that the width W of the chuck device is configured to be small.

FIG. 2 is a perspective view showing a state in which a slide block of the apparatus for chucking a pile from the side in the embodiment shown in FIG. 1 is extracted and the slide cylinder and the pile chuck cylinder are extended. is there. FIG. 3 is a side view of the slide block of the apparatus for chucking a pile from the side in the embodiment shown in FIG. 1 described above, partially cut away and viewed in a direction parallel to the central side of the U-shaped frame. is there. The member indicated by reference numeral 24 shown in FIGS.
This is a slide guide for guiding the slide block B in a direction parallel to the center side of the U-shaped frame, and engages with the rail 20a shown in FIG. 3 to form a so-called dovetail engagement. ing. A locking wedge 27 is pushed into and pulled out of the sliding surface of the guide member by a locking cylinder 26 at right angles to the guide direction.

As shown in the left half of FIG. 1, the slide cylinder 22 and the pile chuck cylinder 21 are contracted and the movable jaw 16b is retracted, and the H-shaped steel is inserted into the central concave portion of the U-shaped frame 20. After receiving the slide 12, the slide cylinder 22 is first extended to drive the slide block B in a direction to approach the H-shaped steel 12. At this time, the lock cylinder 26 (FIGS. 2 and 3) is contracted in advance, the lock wedge 27 is pulled out, and the lock is released.

Simultaneously with the extension of the slide cylinder 22, or after the slide cylinder 22 is extended,
The pile chuck cylinder 21 is extended, and the movable jaw 16b is brought into close contact with the H-beam 12 as shown in the right half of FIG. The lock cylinder 26 is extended and the lock wedge 27 is pressed in until the movable jaw 16b comes into close contact with the movable jaw 16b to prevent the slide block B from sliding. As a result, the slide cylinder 22 cannot expand and contract. When the slide block B is locked as described above, even if the pile chuck cylinder 21 generates a strong force, the slide cylinder 22 does not receive a reaction force. Therefore, the slide cylinder 22 is replaced with the pile chuck cylinder 21.
Smaller diameter cylinders are not only lighter and cheaper, but also operate faster (for the same flow rate) and work efficiency is higher.

When the pile chuck cylinder 21 exerts a strong clamping force, it is necessary to prevent the two parallel sides of the U-shaped frame 20 from being deformed so as to be opened.
In the present embodiment, a reinforcing member 25 is provided for connecting both ends of the two parallel sides of the U-shape to each other. However, the reinforcing member 25 needs to be detachable or openable and closable so as not to prevent the H-shaped steel 12 from entering and exiting the U-shaped inner space of the U-shaped frame 20. The reinforcing member 25 of this embodiment has a door-like structure that can be opened and closed. One end of the reinforcing member 25 is rotatably mounted on a reinforcing material mounting shaft 25a, and the other end is provided with a hook 25b. It has a detachable structure. The opening-closing reinforcing member may be mainly subjected to tension and endure it. Although illustration is omitted, it is convenient to construct so as to open and close by a hydraulic cylinder. Although illustration is omitted, the hydraulic cylinder for driving the opening / closing type reinforcing member 25 to open and close can be easily operated if it is piped so as to be linked with the slide cylinder 22 or a sequence valve is provided. There is no fear that the U-shaped frame 20 will be deformed.

(See FIGS. 1 to 3) In this embodiment,
The slide cylinder 22 is mounted on the slide block B. That is, the cylinder is fixedly incorporated in the slide block B. As is apparent from the structure and function described above, the role of the slide cylinder 22 is to reciprocate the slide block B. Therefore, the slide cylinder 22 does not necessarily need to be mounted on the slide block B. It can also be mounted on the U-shaped frame 20. For example, as shown by a broken line in FIG. 3, a slide cylinder 20b may be provided in a rail 20a which is a component fixed to the U-shaped frame 20. Regardless of where the slide cylinder is installed, it is desirable that the slide cylinder and the pile chuck cylinder be hydraulic cylinders. Even if it is not impossible to configure with an air cylinder, a hydraulic cylinder can provide a hydraulic lock more effectively than an air cylinder, and in addition, it is generally easy to generate a large force and troubles such as condensation in the system Is less likely to occur. When the slide cylinder and the pile chuck cylinder are of a hydraulic type, the hydraulic system of the lock cylinder 26 also simplifies the piping system and the like and facilitates the configuration of the control system.

[0025]

As described above, according to the embodiment of the present invention, the structure and function thereof are clarified. According to the first aspect of the present invention, the stroke of the pile chuck cylinder is supplemented by the stroke of the slide cylinder. Even if the pile chuck cylinder is relatively short, the pile can be chucked, and the cylinder can be prevented from protruding to the side of the U-shaped frame.

According to the second aspect of the present invention, since the slide block is driven by the hydraulic cylinder, the expansion and contraction of the pile chuck cylinder and the movement of the slide block can be operated by the same energy source (hydraulic source). And the structure of the operation system are simple, and the operation can be easily and reliably performed.

According to the third aspect of the present invention, even if the operating force of the means for moving the slide block is weak, the slide block is locked before the pile chuck exerts a large force. However, any reaction force of the chuck operation of the pile chuck is supported by the lock means, and there is no possibility that the slide block is pushed back by the reaction force, and the pile can be strongly chucked with a stable force. .

According to the fourth aspect of the present invention, a large locking force can be obtained with a relatively small force by utilizing the boosting action of the wedge, and moreover, compared with various locking means such as bolts and pins. Can be operated quickly and easily,
Can be locked at any point. Further, since the wedge is press-fitted and pulled out by the hydraulic cylinder, it can be locked and unlocked by remote control using the same hydraulic source as the pile chuck cylinder.

According to the fifth aspect of the present invention, the U-shaped frame can withstand a large reaction force of the clamping force of the pile chuck cylinder without being particularly rigid, so that the entire apparatus can be made lightweight. In addition, the pile can be strongly chucked and driven, and a pull-out operation can be performed.

According to the sixth aspect of the present invention, the slide block on which the pile chuck cylinder is mounted is driven by the slide cylinder in the same direction as the extension / retraction operation of the pile chuck cylinder. The distal end has an operation stroke corresponding to the extension / contraction stroke of the pile chuck cylinder + the extension / contraction stroke of the slide cylinder based on the U-shaped frame. Therefore, even if the length of the pile chuck cylinder and the length of the slide cylinder are set to be relatively short, the tip of the piston rod of the pile chuck cylinder has an operating stroke necessary for chucking and releasing the pile. Is obtained. Since the length dimensions of the pile chuck cylinder and the slide cylinder are short, there is no possibility that these cylinders protrude in the width direction of the U-shaped cylinder.

According to the seventh aspect of the present invention, the entire pile chuck cylinder is reciprocated in parallel with the central side of the U-shaped frame and expands and contracts in parallel with the central side. Has a reciprocating stroke corresponding to “the sum of the extension stroke of the pile chuck cylinder and the extension stroke of the slide cylinder”. Therefore, the length of the pile chuck cylinder and the length of the slide cylinder are set relatively short so that these cylinders do not project to the side of the U-shaped frame. Thus, a reciprocating stroke required for chucking and releasing the pile can be obtained.

According to the invention of claim 8, even if the operating force of the slide cylinder is relatively weak, the reaction force of the chucking force by the pile chuck cylinder is supported by the lock, and there is no possibility that the slide cylinder is pushed back. Therefore, the slide cylinder can be made relatively thin, and a stable and powerful pile chuck function can be obtained.

According to the ninth aspect of the present invention, the lock for supporting the reaction force of the pile chuck cylinder and the release of the lock can be quickly performed by remote control.

According to the tenth aspect of the present invention, the U-shaped frame can be made lightweight without fear of being deformed by the reaction force of the pile chuck cylinder.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional plan view showing an embodiment of a device configured to carry out a method of chucking a pile from the side according to the present invention, and a right half of the figure is a pile. , And the left half of the figure shows the state in which the chuck of the pile is released.

FIG. 2 shows a slide block of a device for chucking a pile from the side in the embodiment shown in FIG.
It is the perspective view which drew the state which extended the slide cylinder and the pile chuck cylinder.

FIG. 3 is a side view of the slide block of the apparatus for chucking a pile from the side in the embodiment shown in FIG. 1 partially broken away and viewed in a direction parallel to the central side of the U-shaped frame. is there.

FIG. 4 is a view for explaining a method of driving a pile or pulling out a pile, wherein (A) is a schematic diagram showing the entire construction site, and (B) is a state in which a sheet pile as a pile is chucked. (C) is a schematic plan view of a state where an H-shaped steel as a pile is chucked, and (D) is a schematic plan view of a state where a steel pipe or a concrete pile as a pile is chucked. .

FIG. 5 is a view for explaining a pile punching method when an existing obstacle such as a structure exists,
(A) is a schematic plan view depicting a state in which an H-section steel is punched out, (B) is a schematic plan view depicting a state in which sheet piles are arranged and driven, or the sheet piles arranged in a row are pulled out, (C) is an explanatory view of the planar shape of the U-shaped frame.

FIG. 6 shows a conventional example of the mechanism for driving the jaws shown in FIGS. 4B, 4C and 4D, and FIG. 6A shows the mechanism for driving the jaws via a lever. FIG. 4B is a schematic view of a mechanism for driving a pair of movable jaws by a hydraulic cylinder, and FIG. 4C is a schematic view of a mechanism for driving a movable jaw opposed to a fixed jaw by a hydraulic cylinder. FIG.

[Explanation of symbols]

16a: fixed jaw, 16b: movable jaw, 20: U-shaped frame, 20a: guide rail, 20b: slide cylinder, 21: pile chuck cylinder, 22: slide cylinder, 23: piston rod, 24: slide guide, 25 ... Opening / closing type reinforcement, 25 ... Reinforcement mounting shaft, 25b
... Hook, 26 ... Lock cylinder, 27 ... Lock wedge, B
... Slide block.

Claims (10)

(57) [Claims] 1. A method of chucking a pile for driving or pulling out a pile, wherein a slide block guided parallel to a central side of the U-shape is provided on two parallel sides of the U-shape frame. Along with the middle slide block, a hydraulic pile chuck cylinder that expands and contracts in parallel with the center side is mounted, and the slide block is moved toward the inside of the U-shaped concave portion, and the pile chuck cylinder is moved. A method of chucking a pile from the side, characterized in that the pile is chucked by extending toward the inside of a U-shaped recess. 2. The method for chucking a pile from the side according to claim 1, wherein the movement of the slide block is driven by a hydraulic cylinder. 3. After moving the slide block toward the inside of the U-shape, before completing the extension of the pile chuck cylinder, stop the movement of the slide block with respect to the U-shaped frame. The method for chucking a pile from the side according to claim 1, wherein the pile is locked. 4. A wedge is press-fitted by a hydraulic cylinder between the slide block and the U-shaped frame or between the slide block and a member fixed to the U-shaped frame to lock the lock. 4. The method of claim 3, wherein the locking is released by pulling out the wedge. 5. After passing the U-shaped opening of the frame and positioning the pile between two parallel sides of the U-shape, the pile chuck cylinder is extended to chuck the pile. Before finishing, a reinforcing member is attached between the ends of the two parallel sides of the U-shape of the frame, and a reaction force is generated when the pile chuck cylinder extends to clamp the pile. The method for chucking a pile from the side according to any one of claims 1 to 4, wherein deformation of the frame in a direction in which two parallel sides of a U-shape of the frame open is caused by the following. . 6. A device for chucking a pile from the side to drive or pull the pile, comprising: a frame having a U-shaped horizontal cross section; and a U-shaped parallel two sides of the frame. A slide block that is provided on at least one of the sides and is guided in parallel with the U-shaped central side, and is mounted on the slide block and arranged in parallel with the U-shaped central side. A pile chuck cylinder for extending the piston rod into the central concave portion of the U-shape, and mounted on the slide block to reciprocate the slide block in a direction parallel to the central side of the U-shape. An apparatus for chucking a pile from the side, comprising: 7. An apparatus for chucking a pile from the side for driving or pulling the pile, comprising: a frame having a U-shaped horizontal section; and two parallel U-shaped sides of the frame. A pile chuck cylinder, which is mounted on at least one of them, is supported in parallel with the U-shaped central side, and is guided in parallel with the U-shaped central side, and is mounted on the frame, A slide cylinder for reciprocatingly driving the pile chuck cylinder in a direction parallel to the central side of the U-shape. 8. The apparatus according to claim 6, further comprising means for locking reciprocation of the slide block or the pile chuck cylinder in parallel with a U-shaped central side. A device that chucks the described pile from the side. 9. A wedge-shaped locking means, wherein said locking means is press-fitted between a member guided in parallel with a central side of a U-shape and a member to be guided in a direction substantially perpendicular to the guiding direction and pulled out. 9. The device for chucking a pile from the side according to claim 8, comprising a member and a lock cylinder for reciprocatingly driving the wedge-shaped member in a press-fitting and pulling-out direction. 10. A reinforcing member for interconnecting the vicinity of the front ends of the two parallel sides so as to prevent the two parallel sides of the U-shape of the frame from being deformed into an open shape, and The above-mentioned reinforcing member has a detachable structure, or a structure that can be opened and closed like a door, so as not to prevent the pile from entering or leaving the U-shaped concave portion.
An apparatus for chucking a pile according to any one of claims 6 to 9 from a side.