JP2008297823A - Pile extractor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized pile extractor which is small and portable, is easily operated on a construction site even by a worker who has no work experience, and then improves work efficiency of pile extraction. <P>SOLUTION: The pile extractor is provided with a body 1, a pile-retaining member, and a hydraulic jack. The body 1 has a groove 12 with which the pile provided upright on an enclosure 1 is engaged, and the pile-retaining member grips the pile. The hydraulic jack provided in the body 1 places the pile-retaining member on its top surfaces 33a, 33b, and push them up. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pile extraction device, and more particularly to a pile extraction device that is small and easy to operate.

  As a pulling device for pulling out large piles such as H-shaped steel and steel sheet piles embedded in the ground, a vibratory hammer suspended in a crane is connected to the head of the pile, and the vertical movement generated by the vibratory hammer is performed. Method of pulling out using the method, or method of pulling out the pile using the reaction force by dropping the reaction force plate by connecting the head of the pile to a pulley suspended on a crane, after drilling the periphery of the pile A method of cutting or pulling out a pile is known. There is also a method in which a pile is sandwiched between hydraulic chucks mounted on a civil construction work vehicle such as a tractor and moved up and down by hydraulic pressure.

  In addition, there has been reported a pulling device that can pull out a reaction force frame placed on pillars provided at four corners of a gantry frame so as to surround a stake with a pulling jack and pull it in a relatively small space. (See Patent Document 1).

JP2007-31976

  However, these conventional pile pulling devices are devices for pulling out large piles, and the relatively small piles used for temporary enclosures at construction sites, etc., must be used outside the application of construction machinery. Since it is prohibited, there has been a problem that, in the past, it has often relied on manual work, which requires a large number of work steps.

  The present invention solves this problem and is a small pile that can be carried in a small size and can be easily operated even by an operator who has no work experience at the work site, and can improve the work efficiency of pile removal. An object is to provide a drawing device.

  In order to solve the above-mentioned problems, a pile pulling device according to the present invention includes a main body portion having a groove portion into which an upright pile can be inserted, a pile holding member capable of holding the pile, and the pile provided inside the main body portion. And a hydraulic jack that can be pushed up by placing the holding member on the upper surface.

  Here, the said hydraulic jack is good also as a structure provided so that it could operate independently by one pair on the right and left of the said groove part of the said main-body part.

  Moreover, the said pile holding member can be set as the structure provided with the arm part which has the hole part which clamps the said pile in the center, and the fastening means which fastens the said pile clamped by this hole part.

  Furthermore, the said arm part of the said pile holding member may be rotatably supported by the hinge in the center, and it may be comprised so that the said pile can be clamped by the said hole part by this rotation.

  Here, the said pile holding member can also be made to have a recessed part which receives the upper surface of the said hydraulic jack in the lower surface.

  In order to solve the above-mentioned problem, the pile drawing method of the present invention includes a main body portion having a groove portion into which an upright pile can be inserted, a pile holding member capable of holding the pile, and the pile provided inside the main body portion. In a pile drawing method using a pile drawing device provided with a hydraulic jack that can be pushed up by placing a holding member on the upper surface, a pile fitting step for fitting the pile erected from the ground surface into the groove portion, It has the holding member clamping process which clamps the said pile holding member in the part above the said groove part, and the pushing-up process which pushes up the said pile holding member using the said hydraulic jack, It is characterized by the above-mentioned.

  As described above, the pile pulling device according to the present invention includes a main body portion having a groove portion into which an upright pile can be inserted, a pile holding member capable of holding the pile, and the pile holding member provided inside the main body portion. Since it is configured to include a hydraulic jack that can be pushed up by being placed on the upper surface, even an inexperienced operator can pull out a large number of piles in a short time with little force. Moreover, since the device is relatively small and light, it is easy to carry.

The present invention relates to a pile pulling apparatus for pulling out a small pile used for a so-called temporary enclosure.
Temporary fences are used when building or dismantling a building or when painting a building with paint or the like. Usually, 75 piles are required for an enclosure of around 100 m.
Such a pile has a diameter of 48.6 mm, about 60 cm when the length is 1 m, and about 1 m when the length is 1.5 m. If 75 piles are pulled out manually, the conditions vary depending on the construction site, but even if several people are working, it takes about one day (8 hours). Even if the work machine is diverted, the man-hour cannot be reduced so much and the cost is increased.

In particular, as the number of days since the pile was driven became longer, 1 month, 1 year, and 2 years later, and as the ground around the pile was solidified due to rain, the work man-hours became difficult. Will increase. It also depends on whether the ground you are driving is soil or asphalt.
The present invention solves such a problem, and provides a pile pulling-out device capable of easily and efficiently pulling out such a small pile with a short man-hour even by an operator having no experience.

Hereinafter, the present invention will be described in detail with reference to the drawings.
1 is a perspective view of a main body 1 of an embodiment of a pile pulling apparatus according to the present invention, FIG. 2 is a front perspective view of the main body 1 of the embodiment shown in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a side perspective view of the main body 1 of the embodiment shown in FIG. 1.
Furthermore, FIG. 5 is a top view including the pile holding member 2 of the pile pulling device according to the present embodiment, and FIG. 6 is a side sectional view of the pile pulling device according to the present embodiment.

  As shown in FIG. 1 thru | or FIG. 6, the main-body part 1 is provided with the groove | channel part 12 which guides the pile 4 standingly arranged by the front side, and is comprised by the housing | casing 11 which has the handle 13 on the left and right side surfaces. A pair of hydraulic jacks 3 a and 3 b are accommodated on the left and right of the groove portion 12 inside the housing 11.

  The hydraulic jacks 3a and 3b are respectively provided with handles 31a and 31b and pressure release cocks 32a and 32b. By moving the handles 31a and 31b up and down while the pressure release cocks 32a and 32b are closed, the hydraulic jack 3a The upper jack surfaces 33a and 33b of 3b can be independently pushed up by hydraulic pressure. The bases of the handles 31a and 31b are screw-shaped and can be removed and stored so as not to get in the way during transport.

On the other hand, as shown in FIG.5 and FIG.6, the pile holding member 2 is comprised by the arm part 21 which has the hole part 23 in the center, and the one side of the hole part 23 is rotatably hold | maintained by the hinge 22. As shown in FIG. On the other side of the hole 23, fastening means 24 for fastening the diameter of the hole 23 with a screw and fixing the pile 4 inserted into the hole 23 is provided.
Since it is such a structure, after loosening the fastening means 24, the arm part 21 is opened with the hinge 22 as an axis, and the pile 4 is sandwiched between the holes 23, and then the fastening means 24 is tightened to hold the pile. The pile 4 can be clamped by the member 2.

A method of pulling out the pile 4 by this pile pulling device will be described.
First, the main body 1 of the pile pulling apparatus according to this embodiment is carried near the pile 4 to be pulled out, and the pile 4 is fitted into the groove 12 (pile insertion process). At this time, the pressure release cocks 32a and 32b of the hydraulic jacks 3a and 3b are kept open. Since the main body 1 is relatively small and light, and the handles 13 are provided on both side surfaces, it is relatively easy to carry to the side of the pile 4 and fit the pile 4 into the groove 12. Moreover, since the groove part 12 is provided with the guide which contacts the side surface of the pile 4 up and down, the center point can be determined only by putting the pile 4 in the groove part 12 and fitting, There is no fear that the position will be shifted during the extraction and the extraction will fail.

In this state, the pile holding member 2 is clamped to the upper part of the pile 4 that protrudes above the groove 12 (holding member clamping step).
The pile holding member 2 is simply clamped by loosening the fastening means 24, opening the arm portion 21 around the hinge 22, sandwiching the pile 4 in the hole portion 23, and then fastening the fastening means 24. This allows the pile holding member 2 to be fixed to the pile 4.
In addition, by providing the recessed part which accepts the jack upper surfaces 33a and 33b of the hydraulic jacks 3a and 3b in the lower surface of the pile holding member 2, the positioning of the pile holding member 2 is facilitated, and the hydraulic jacks 3a and 3b Misalignment can be prevented during operation.

After the pile 4 is clamped by the pile holding member 2, the pressure release cocks 32 a and 32 b are closed and then the handles 31 a and 31 b are operated to push the pile holding member 2 up by the hydraulic jacks 3 a and 3 b. The operation of removing the clamped pile 4 is performed (push-up process).
At this time, since the hydraulic jacks 3a and 3b can be operated separately, when the ground is inclined and the direction in which the pile 4 stands is inclined with respect to the ground, the hydraulic jack on one side 3 is operated in advance so that the direction of the groove portion 12 substantially coincides with the standing direction of the pile 4, and then the pile 4 is inserted into the groove portion 12, and then the pile holding member 2 is placed in a horizontal direction perpendicular to the pile 4. Then, the fastening means 24 is closed and fixed.

After fixing the pile holding member 2 to the pile 4, the hydraulic jacks 3 a and 3 b are operated simultaneously or alternately to push up the pile holding member 2 loaded on the jack upper surfaces 33 a and 33 b, Pull out the fixed pile 4.
When pulling out the pile 4, it is not necessary to pull out all the parts buried in the ground of the pile 4, and if it is pulled out about 5 to 10 cm, it can be easily pulled out by hand.

After the pile 4 is pushed up a little by the jack upper surfaces 33a, 33b of the hydraulic jacks 3a, 3b and the part buried in the ground rises a little, the fastening means 24 is loosened and the pile holding member 2 is removed from the pile 4 After that, the pile 4 is pulled out manually.
The pile pulling device is prepared by loosening the pressure release cocks 32a and 32b and lowering the jack upper surfaces 33a and 33b of the hydraulic jacks 3a and 3b.

  By repeating the pulling work in this way, even an operator with little work experience at the construction site can efficiently pull out the pile in about 1/3 of the work time of manual work. Further, when a plurality of pile holding members 2 are prepared, the pile holding members 2 are attached to a plurality of piles 4 in advance, and the main body 1 of the pile drawing device is sequentially moved to perform the drawing work. Time can also be shortened.

As mentioned above, although this invention was demonstrated along one embodiment, this invention is not limited to this embodiment, A various deformation | transformation can be considered in the range which does not deviate from the meaning of this invention.
For example, in the above embodiment, the pile holding member 2 is shown as a shape having the arm portion 21 that can be opened and closed at the center, but it may be configured in a ring shape or a plate shape, and the fastening means 24 is also a screw in the embodiment. Although the type that is tightened by the above is described, it can hold the pile 4 sufficiently when it is pulled out, even if it is formed so as to be tightened by a spring, or it fits into a step or recess provided in the pile 4 Anything can be used.

  Moreover, the shape of the main body 1 can also guide the pile 4 sufficiently, the hydraulic jacks 3a and 3b can be installed on both sides of the pile 4, and the pile holding member 2 to which the pile 4 is fixed can be pushed up and is small and portable. Any shape is possible as long as it is possible.

  Since the present invention is configured and functions as described above, the pile holding member 2 sandwiching the pile 4 is pushed up by the hydraulic jacks 3a and 3b, so that the pile 4 driven into the ground can be moved with less force and in a short time. It can be pulled out efficiently. Furthermore, the efficiency can be further increased by preparing a plurality of pile holding members 2 and fixing them to the plurality of piles 4 in advance. Here, the height for pushing up the pile 4 is at most about 5 to 10 cm. In this apparatus, the center point can be determined simply by applying the pile 4 to the groove portion 12, and positioning is easy. Since the left and right hydraulic jacks 3a and 3b can be operated independently, it is possible to easily cope with the pile 4 driven into the slope. It can also be used easily by an operator with little experience. Since the pile holding member 2 and the handles 31a and 31b can be separated, they are easy to carry. It has the features such as.

  Since the present invention can efficiently pull out small piles as described above, it can be widely used at any construction site where temporary enclosures are required, and can be used in a wide range of construction and construction industries. It has the potential to be widely used.

It is a perspective view of the main-body part of one Embodiment of the pile drawing-out apparatus of this invention. It is a front side perspective view of the main-body part of embodiment shown in FIG. It is a back surface side perspective view of the main-body part of embodiment shown in FIG. It is a side perspective view of the main-body part of embodiment shown in FIG. It is a top view including the pile holding member of the embodiment shown in FIG. It is side surface sectional drawing including the pile holding member of embodiment shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main-body part 2 Pile holding member 3a, 3b Hydraulic jack 4 Pile 11 Case 12 Groove part 13 Handle 21 Arm part 22 Hinge 23 Hole part 24 Fastening means 25 Recessed part 31a, 31b Handle 32a, 32b Pressure release cock 33a, 33b Jack upper surface

Claims (6)

A main body portion having a groove portion into which the erected pile can be inserted, and
A pile holding member capable of sandwiching the pile;
A hydraulic jack provided inside the main body and capable of being pushed up by placing the pile holding member on an upper surface;
A pile pulling device characterized by comprising:   2. The pile pulling apparatus according to claim 1, wherein the hydraulic jack is provided so as to be independently operable on a pair of left and right sides of the groove portion of the main body portion.   The said pile holding member is provided with the arm part which has the hole part which clamps the said pile in the center, and the fastening means which fastens the said pile clamped by this hole part, The feature is characterized by the above-mentioned. Or the pile drawing-out apparatus of 2 or 2.   The pile extraction device according to claim 3, wherein the arm portion is rotatably supported by a hinge at a center thereof, and is configured to be able to sandwich the pile by the hole portion by the rotation. .   The pile pulling device according to any one of claims 1 to 4, wherein the pile holding member has a concave portion for receiving an upper surface of the hydraulic jack on a lower surface thereof. A main body part having a groove part into which a standing pile can be fitted, a pile holding member capable of sandwiching the pile, and a hydraulic jack provided inside the main body part and capable of being pushed up by placing the pile holding member on an upper surface; In a pile drawing method using a pile drawing device equipped with
A pile insertion step of inserting the piles erected from the ground surface into the groove,
A holding member clamping step of clamping the pile holding member to a portion above the groove of the pile;
A pushing-up step of pushing up the pile holding member using the hydraulic jack;
A method for pulling out a pile, characterized by comprising:

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