JP2640927B2 - Static load type pile puller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static load type pile pulling machine, and more particularly, to pulling out a pile such as a steel sheet pile or an H-shaped steel standing at a constant height from the ground at a constant height by a static load. Related to a drawing machine.

[0002]

2. Description of the Related Art In civil engineering work in an urban area, when a pile of steel sheet pile or H-shaped steel is pressed into the soil, or when the pressed-in pile is pulled out, construction that does not generate large vibration or noise from the viewpoint of environmental protection. A method is desired. In particular, pulling out piles that are at a high stop involves dangerous work at high places, making it one of the difficult civil works.

[0003] As a conventional pile pulling method, a method generally called a vibration method or a method using multiple pulleys is known. Further, Japanese Patent Publication No. 6-15771 proposes a static load type pile press-in / pull-out method. In this method, the device main body is placed and fixed on an existing pile, the pile is chucked by a pile gripping device while taking a reaction force by the existing pile, and the pile is pressed and driven based on a static load method by driving a pile press-in / draw-out cylinder. The pulling out work is performed, and the main body of the device itself runs on the pile itself.

[0004]

When focusing on such a conventional pile pulling operation, the vibration method requires a large crane truck, a generator, a hydraulic unit and the like, and occupies a wide working space. Moreover, there is a problem that it is not suitable for civil engineering work in an urban area or the like due to strong vibration or noise.

[0005] On the other hand, the method using multiple pulleys requires a large crane, has the drawback that the chucking operation is carried out at a high place by hand and involves dangers, and the pulling length of the pile is limited. Remains. That is,
When the pile to be pulled out becomes longer, the pulley body also needs to be made longer, which makes the work when installed on a crane unstable. In addition, the setting of the wire requires labor and time, and the longer the wire is, the more the wire is stretched at the time of pulling out, resulting in a decrease in efficiency. In particular, since the whole operation always requires a high space and a wide operation radius, it is difficult to pull out the pile when there are electric wires or the like in the sky.

According to the static load type pile press-in / pull-out machine described in Japanese Patent Publication No. Hei 6-15771, large vibration and noise are not generated but continuous pile pulling requires setting at a high place and involves a risk. However, in order to reduce this danger, there is a disadvantage that the apparatus body must be held by a large crane. In particular, there are few pile pullers that can handle the extraction of H-beams, and even with the above-mentioned pile press-in and pull-out machine, the area around the chuck part of the pile is not released. If there is an object, it is impossible to cope with it, and a wide reaction force table for taking a reaction force is required at the time of pulling out a pile, and there is a problem that a workable range is limited. This device also has the disadvantage of being expensive and difficult to purchase for small businesses.

In view of the above, the present invention has been made in view of the above, and provides a pile pulling machine capable of easily and quickly constructing a pile of a steel sheet pile or an H-shaped steel in a particularly high stopping state by a static load method. The purpose is to do so.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a support having an opening formed on the front side thereof to form a substantially U-shaped frame in a plan view, and sliding along the frame. A slider movably disposed, a pair of clamps on the upper surface side of the slider and rotatably supported by the slider,
A pair of left and right sides in which a lower end is rotatably mounted on a lower plate to which the support is fixed, and a distal end of a piston rod protruding and retractable is rotatably supported at one lower end of the clamp. Provided is a structure mainly composed of a cylinder, wherein a pile driven into the soil by the frame is surrounded from three sides, then the pile is clamped by a pair of right and left clamps, and the pile is pulled out by the driving force of the cylinder. . Further, the slider is slidably disposed along a liner stretched on the inner surface side of the upper portion of the frame, the clamp is formed in a substantially L-shape, an intermediate portion is axially mounted on the slider, and a piston rod is provided. The present invention provides a configuration in which the clamp is rotated by the extension of the pin to clamp the pile, and after the clamping is completed, the extension force of the piston rod becomes the lifting force of the slider and acts as the pull-out force of the pile.

A clamp head is removably mounted at the other end of the clamp where the pile comes into contact with the pile. The clamp has a bell crank-shaped lever rotatably mounted on the slider. A clamp head detachably connected to an upper end of a lever, wherein the clamp head has a base for attachment to a clamp and an arc-shaped spherical portion, and a plurality of claw teeth are formed on the spherical portion. I will provide a.

[0010]

According to the present invention having the above construction, a pile pulling machine is loaded on a moving vehicle and transported to a construction site, and then lowered to a position near a pile driven into the soil at a high level using a crane or the like. , Move the pile puller with the opening of the frame facing the pile, set the pile to surround the pile from three sides, and fix the lower plate to the ground,
Operate the hydraulic unit. Then, the piston rod of the cylinder extends, the clamp head side of the pair of clamps rotates in the direction of pressing the pile, the claw teeth of the clamp head bite from both sides of the pile, and both sides of the central part of the pile are strong with the clamp. It is pinched.

Then, by continuing the extension of the piston rod, the slider moves up along the column together with the clamp, and at this time, the pile is pulled out of the ground by the height of the slider. When one stroke of the cylinder is completed, the slider is returned to the original position by pulling the piston rod into the cylinder by operating the hydraulic pressure source. Therefore, the above operation is repeated again, and the pile is pulled out step by step. When the pile is lifted off the ground by a crane or the like, the pile removal operation is completed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of a static load type pile puller according to the present invention will be described below with reference to the drawings. FIG. 1 is a half sectional front view showing the entire pile pulling machine of this embodiment, FIG. 2 is a plan view of the same half back surface, and 2 and 2 in FIG. The upper plate 4 is a lower plate, and these four columns 2, 2
And an upper plate 3 and a lower plate 4 to form a substantially U-shaped frame body 5 which is surrounded by three sides in a planar shape and has an opening 30 formed on the front side. As will be described later in detail, the opening 30
The pile 26 of H-shaped steel or the like to be pulled out by the pile pulling machine 1 inside
Is located.

A liner 6 is provided on the inner surface of the upper portion of the frame 5.
A T-shaped reinforcing column 7 is disposed between the columns 2 and 2 at the center of the frame 5 and slightly below. Further, brackets 8 and 8 are respectively fixed on the lower plate 4 located outside the pair of columns 2, and a pair of left and right cylinders having lower ends pivotally mounted on the brackets 8 and 8 with the shafts 16 and 16. 9, 9 are mounted. Reference numerals 10 and 10 denote piston rods which protrude from the cylinders 9 and 9 so that they can move forward and backward.
Reference numeral 11 denotes a slider interposed between the pair of columns 2 on both sides so as to be able to move up and down.
Slidably in contact with

A pair of brackets 12, 12 are fixed to the upper surfaces of the sliders 11, 11, and a pair of clamps 13, which are substantially L-shaped when viewed from the front, are attached to the brackets 12, 12.
13 is rotatably supported by shafts 14 and 14. Lower ends of the clamps 13, 13 are rotatably supported on the distal ends of the piston rods 10, 10 by shafts 15, 15 at the other ends of the clamps 13, 13 where the piles abut. Clamp heads 17, 17 are detachably mounted. As shown in FIG. 1, a pair of left and right cylinders 9, 9, piston rods 10, 10, sliders 11, 1 are provided.
The pair of 1 and substantially L-shaped clamps 13 are symmetrical about the center line O of the pile 26.

The cylinders 9, 9 are connected to pipes 25, 25 for supplying or removing pressure oil, and these pipes 25, 25 are connected to a hydraulic unit (not shown). This hydraulic unit has a carrier on which the pile pulling machine 1 can be mounted, and is mounted on a crawler as a moving vehicle equipped with a crane.

The clamp 13 is shown in FIGS.
(C) As shown in (D), the front view has a substantially L-shape, that is, a bell-crank lever shape, and a protrusion 18 for mounting the clamp head 17 and a screw hole 19 at one end thereof. , 19 are provided, and the other end is formed in a forked shape,
A through-hole 21 through which the shaft 15 is inserted is opened in the forked portion, and a through-hole 2 through which the shaft 14 is inserted substantially in the center of the clamp 13.
0 is open.

The other clamp head 17 is shown in FIG.
(B) As shown in (C), it has a mounting base 17a and an arc-shaped spherical portion 17b, and the mounting base 17a has a concave portion 22 and a screw hole 23, 2 which engage with the convex portion 18 of the clamp 13.
3, and a large number of claw teeth 24 are formed on the spherical surface portion 17b. Therefore, the clamp head 17 can be replaced with the clamp 13 when the teeth 24 are worn.

The operation of the pile pulling machine 1 according to this embodiment will be described below. First, the pile puller 1 is loaded on a crawler as a moving vehicle and transported to a construction site, and the pile puller 1 is lifted up by wire using a boom, an arm or a crane provided on the crawler, and the pile puller 1 is lifted into the ground. The pile pulling-out machine 1 is lowered near the pile 26 driven into a stop, and the opening 30 of the frame 5 is gradually moved toward the H-shaped steel pile 26 as shown in FIG. Set to surround from. Then, the lower plate 4 is fixed on the ground.

Next, the pipe 25 of the cylinder 9 is connected to a hydraulic unit (not shown) mounted on the crawler, and the hydraulic unit is driven to operate, whereby the piston rod 10 of the cylinder 9 is extended as shown in FIG. Then, the clamp 13 is rotated about the shaft 14 in the direction of pinching and pressing the pile 26, and both sides of the central portion of the pile 26 are a pair of clamps 13,13.
It is pinched by. As a result, the pawl teeth 24 of the clamp head 17 bite from both sides of the pile 26 to strongly clamp the pile. Then, by continuing to extend the piston rod 10, the slider 11 rises along the column 2, and the pile 26 is pulled out from the ground by the height of the slider 11 as shown in FIG. That is, the piston rod 1
With the extension of 0, the clamp 13 is rotated to clamp the pile 26, and after the clamping is completed, the extension force of the piston rod 10 becomes the lifting force of the slider 11 and acts as the pulling force of the pile 26.

When one stroke of the cylinder 9 is completed, the hydraulic oil is operated to drain the pressure oil of the cylinder 9, whereby the piston rod 10 is drawn into the cylinder 9 and the slider is moved as shown by an arrow D in FIG. Since 11 returns to the original position, the above operation is repeated again after shortening the piston rod 10, and the pile 26 is pulled out step by step. Then, when the pile 26 is lifted off the ground, the pile 26 is pulled up by a crane (not shown), thereby completing the pile pull-out operation.

[0021]

According to the present invention described above, a pair of clamps are turned by mainly driving a hydraulic unit by setting a pile driven at a high stop so as to be surrounded by a frame from three sides. Then, the both sides of the central part of the pile are strongly clamped by the teeth of the clamp head, and the pile is pulled out from the ground by the height of the slider as the piston rod elongates. Can be pulled out. In particular, the pile puller of the present embodiment does not require a large crane truck or a generator, requires a small working space, and does not generate large vibrations or noises, and thus is suitable for civil engineering work in an urban area or the like. .

Since an opening is provided on the front side of the frame constituting the pile pulling machine of the present invention, even if the pile has obstacles such as a connecting plate, a connecting bolt, cement or the like, the pile can be removed. Sometimes no reaction table is needed. Further, when the clamp head is worn, it can be easily replaced.

Further, since the chucking work of the pile is not performed at a high place, there is no danger, and a stable workability can be obtained by eliminating the need for wire setting as in the multi-pulley system, and a high space and a wide work radius are required during the work. Since it is not necessary, there is no limitation on the pulling length of the pile, and even if there is an electric wire or the like in the sky, the pile pulling operation can be performed without any problem. Since the structure is simple as a whole, there is an effect that the price of the device itself is low.

[Brief description of the drawings]

FIG. 1 is a half sectional front view showing an embodiment of a pile puller according to the present invention.

FIG. 2 is a plan view of the half back surface of FIG. 1;

FIG. 3 is a plan view showing a mode of using the pile pulling machine of the embodiment.

FIG. 4A is a plan view of a clamp used in this embodiment,
(B) Front view, (C) Left side view, (D) Back view.

FIGS. 5A and 5B are a half sectional front view, a side sectional view, and a rear view, respectively, of a clamp head employed in this embodiment.

FIG. 6 is an essential part front view showing an operation mode of the embodiment.

FIG. 7 is a main part front view showing another operation mode of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pile pull-out machine 2 ... Post 3 ... Upper plate 4 ... Lower plate 5 ... Frame 6 ... Liner 9 ... Cylinder 10 ... Piston rod 11 ... Slider 12 ... Bracket 13 ... Clamp 17 ... Clamp head 17a ... Mounting base 17b ... Spherical surface Part 18 ... convex part 22 ... concave part 24 ... tooth nail 25 ... piping 26 ... pile 30 ... opening part

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 55-21353 (JP, U) JP-A 2-11462 (JP, Y2) JP-A 54-30805 (JP, Y2)

Claims (6)

(57) [Claims] An opening is formed on the front side, a column forming a substantially U-shaped frame in a plan view, a slider slidably disposed along the frame, and an upper surface of the slider. And a pair of clamps rotatably supported by the slider, and a lower end pivotally attached to a lower plate to which the support is fixed, and a distal end of a piston rod protruding forward and backward freely. A pair of left and right cylinders rotatably supported at one lower end of the clamp are mainly constituted, and a pair of left and right clamps is formed by surrounding a pile driven into the soil by the frame from three sides. A static load type pile pulling machine characterized in that the pile is gripped and the pile is pulled out by the driving force of the cylinder. 2. The static load type pile puller according to claim 1, wherein the slider is slidably disposed along a liner stretched on the inner surface of the upper portion of the frame. 3. The clamp is formed in a substantially L-shape, an intermediate portion is pivotally mounted on the slider, and the clamp is rotated by the extension of the piston rod to clamp the pile. After the clamping is completed, the extension force of the piston rod is reduced by the slider. The static load type pile pulling machine according to claim 1 or 2, which acts as a lifting force of the pile and acts as a pulling force of the pile. 4. A clamp head is detachably mounted at a position where the pile abuts at the other end of the clamp.
The static load type pile puller according to 2 or 3. 5. The clamp according to claim 1, wherein said clamp comprises a bell crank-shaped lever pivotally mounted on said slider, and a clamp head detachably connected to an upper end of said lever. The static load type pile puller described. 6. The clamp head according to claim 1, wherein the clamp head has a base for attachment to the clamp and an arc-shaped spherical portion, and a plurality of claw teeth are formed on the spherical portion. Static load type pile puller.