WO2021117115A1

WO2021117115A1 - Attachment detachably connected to foundation pile and placement device having said attachment

Info

Publication number: WO2021117115A1
Application number: PCT/JP2019/048177
Authority: WO
Inventors: 克伸青木
Original assignee: 株式会社ギガソーラー
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2021-06-17
Also published as: JPWO2021117115A1

Abstract

An attachment (1A) according to an embodiment of the present invention has a connection part having a contact surface (211) and a protrusion part (22), wherein the length of the protrusion part (22) is 0.8-2 times the radius of the contact surface (211). Accordingly, it is possible to satisfactorily connect a foundation pile to an auger device.

Description

An attachment that is detachably connected to a foundation pile and a driving device that includes the attachment.

The present invention relates to an attachment detachably connected to a foundation pile and a driving device provided with the attachment.

It is known to ensure the stability of the building by connecting the pillars of the building to the foundation piles driven into the ground.

An auger device can be used to drive foundation piles into the ground. As one aspect of the auger device, a hydraulic auger device that is attached to an arm of a heavy machine such as a hydraulic excavator and used is known. A predetermined attachment is attached to the tip of the auger device instead of the auger drill, and the head of the foundation pile is temporarily fastened and fixed by fixing the head of the foundation pile to the attachment with a bolt, and the foundation pile is driven into the ground by rotary driving. There are various shapes of foundation piles, and as an example, a substrate (hereinafter referred to as a flange) for fastening and fixing a pillar of a building to the head of a pile body formed of a cylindrical steel pipe is used. There is a type that is fixed by welding (Patent Document 1). When connecting such a foundation pile with a flange on the head to the attachment of the auger device, an attachment provided with a substrate that contacts the flange of the foundation pile is mounted on the tip of the auger device, and the foundation pile and the auger device are connected. , May take the form of being connected via an attachment. In this case as well, the substrate of the attachment and the flange of the foundation pile are temporarily overlapped with the through hole provided in the substrate of the attachment and the through hole provided in the flange of the foundation pile, and a bolt is inserted there. It is fastened and fixed, or the claw portion provided at the tip of the attachment is locked in the through hole provided in the flange of the foundation pile to temporarily fix it.

Japanese patent application "Japanese Unexamined Patent Publication No. 2007-205108 (published on August 16, 2007)"

The hydraulic excavator with the auger attached to the arm can be used not only when driving the foundation pile, but also when moving the foundation pile from one place to another. Even in the case of movement, the foundation pile and the attachment of the auger device take the above-mentioned temporary fastening state. FIG. 6 schematically shows a state in which the foundation pile 50 is bolted BN via the attachment 1001 of the auger device 1002 connected to the arm 1003 extending from the boom 1004 of the hydraulic excavator 1000. As shown in FIG. 6, when the foundation pile 50 is moved, the longitudinal direction of the pile body 501 of the foundation pile 50 may be horizontal (the direction parallel to the XY plane in the XYZ coordinate system shown in FIG. 6). However, foundation piles are generally made of steel pipes, are heavy, and in some cases have a length of more than 200 cm. Therefore, a large bending moment and torque are applied to the bolt fastening BN, and the bolt fastening BN may not be able to withstand the load and may be damaged, or the bolt fastening BN may be seized. If seizure occurs and the bolt cannot be removed, measures such as breaking the attachment 1001 in order to remove the foundation pile 50 may occur.

In short, the conventional one has a problem that an excessive load is locally applied to the attachment of the auger device.

Therefore, one aspect of the present invention is to provide an attachment of an auger device capable of realizing a good temporary fastening with a foundation pile, and a driving device provided with the attachment.

In order to solve the above problems, in the attachment according to the first aspect of the present invention, a foundation pile having a flange on the head of a tubular pile body is attached between the foundation pile and the auger device in order to attach the foundation pile to the auger device. The attachment is inserted into the pipe from the head side in a state where the connecting portion provided with the contact surface that contacts the upper surface of the flange and the upper surface and the contact surface are in contact with each other. and a projection unit for the pile body and the fitting Te, the length of the protrusions (L _B), the 0.8 times to 2 times the radius of the contact surface (D).

In order to solve the above problems, the driving device according to one aspect of the present invention includes an auger device and the attachment.

According to one aspect of the present invention, it is possible to provide an attachment for satisfactorily connecting a foundation pile to an auger device, and a driving device provided with the attachment.

It is an exploded perspective view which shows the schematic structure of the attachment of the auger device which concerns on one form of this invention together with the head of the foundation pile. FIG. 5 is a cross-sectional view taken along the line AA'shown in FIG. It is a front view which shows the state which the auger device which concerns on one form of this invention is connected with the foundation pile through the attachment shown in FIG. It is a side view which shows the variation of the foundation pile to which the attachment of one form of this invention is fitted. It is a figure explaining the use of the foundation pile to which the attachment of one form of this invention is fitted, and is the exploded perspective view which shows the foundation pile and the pedestal erected with the foundation pile as a foundation structure. It is a figure which shows the modification of the foundation pile to which the attachment of one form of this invention is fitted. It is a figure explaining the conventional aspect.

An embodiment of the present invention will be described with reference to FIGS. 1 to 5.

FIG. 1 is a perspective view showing an auger device attachment 1A provided by a driving device for driving a foundation pile and a foundation pile 50 to be driven according to one embodiment of the present invention.

The attachment 1A in the present embodiment is a component attached to the tip of the auger device included in the driving device of the present embodiment. Note that FIG. 1 does not show the casting device and the auger device.

<Attachment 1A>
The attachment 1A is interposed between the auger device and the foundation pile 50, and transmits the rotational force of the auger device to the foundation pile 50. Therefore, the attachment 1A includes a shaft 10 and a connecting portion 20.

The shaft 10 is a columnar member attached to the auger device. When the shaft 10 receives the rotational torque of the auger device, the shaft 10 rotates about the central axis of the shaft 10. The shaft 10 may be attached to the auger device by a conventionally known method, for example, screwing and bolting. Further, as one aspect, a hexagonal shaft can be adopted for the shaft 10, and the hexagonal shaft can be inserted into the shaft receiving portion of the auger device and fastened by chuck tightening. In this case, as the chuck mechanism, a conventional chuck mechanism for fastening an auger drill can be adopted.

The connecting portion 20 is connected to the foundation pile 50. Specifically, the connecting portion 20 has a contact substrate 21 on which a claw portion is mounted and a protruding portion 22.

The contact substrate 21 has a flange shape in which the outer peripheral portion thereof is expanded in the radial direction from the central axis at one end of the shaft 10. The contact substrate 21 may be integrally formed with the shaft 10, or may be welded and fixed to the shaft 10. As shown in FIG. 1, the contact substrate 21 has a disk shape, and its outer diameter is substantially the same as the outer diameter of the flange 500 of the foundation pile 50, which will be described later. However, not only when they are the same, they may be larger than the outer diameter of the flange of the foundation pile 50. Considering the above-mentioned problems of moment and torque, it is desirable that the outer diameter of the contact substrate 21 is equal to or larger than the outer diameter of the flange of the foundation pile 50. In another preferred embodiment, the planar shape of the contact substrate 21 is not limited to a circular shape, and may be any polygonal shape such as a regular octagon or a regular dodecagon. If circular processing is difficult depending on the material of the abutting substrate 21 and square processing is easier, the planar shape of the abutting substrate 21 may be formed as an arbitrary polygon.

The contact substrate 21 is provided with a contact surface 211 that contacts the upper surface 500a of the flange 500 of the foundation pile 50 and a surface 212 on the auger device side that is the back surface of the contact surface 211.

The contact surface 211 is provided with a plurality of claw portions and the above-mentioned protrusion 22.

A plurality of claws are provided on the outer peripheral portion of the contact surface 211. In the example of FIG. 1, four claw portions 213a (not shown), 213b, 213c and 213d (not shown) are through holes (penetration portions) (one of which is a through hole in FIG. 2). It is inserted through (shown as 210e) and fixed to the contact substrate 21 by bolts 212a (not shown), 212b, 212c, and 212d. In the example of FIG. 1, four claw portions 213a to 213d are arranged 90 degrees rotationally symmetric with respect to the center point of the contact surface 211. Further, in the example of FIG. 1, it is shown that the through

holes

210b, 210d, 210f, and 210h are arranged in 90-degree rotational symmetry at four locations where the claws are not arranged. By arranging the claws in each of the through

holes

210b, 210d, 210f, and 210h via bolts 212, it is possible to correspond to the substantially L-

shaped holes

510b, 510d, 510f, and 510h of the flange 500, respectively. The number of claws is not limited to four, and two to eight can be attached. For soft soil, two claws are sufficient, while for hard soil and bedrock, it is preferable to attach eight claws. Further, if the machining accuracy of the substantially L-shaped holes provided in the flange 500 of the foundation pile 50 is poor, or if the flange 500 of the foundation pile 50 is distorted during transportation, the arrangement of the four substantially L-shaped holes orthogonal to each other is arranged. It is also assumed that the stake is out of alignment with the claw. In such a case, the claw portion can be attached to an arbitrary through hole 210 to enable rotary casting.

Here, the details of the claw portion 213c and its vicinity will be described with reference to FIG. 2, which is an enlarged view of the cross section seen by the arrow at the cutting line AA'shown in FIG. The claw portion 213c and its vicinity have the same configuration as the above-mentioned

claw portions

213a, 213b, 213d and their vicinity.

As shown on the upper side of FIG. 2, the claw portion 213c is fitted in the groove 214c provided on the contact surface 211 of the contact substrate 21. Specifically, the claw portion 213c is fastened by a bolt 212c penetrating the hole 210e in a state of being fitted into the groove 214c. In this embodiment, a female screw is provided on the claw portion 213c and fastened by a bolt 212c. However, a through hole is provided in the claw portion 213c and the claw portion is provided by a bolt 212c and a nut (not shown). 213c may be fastened. The length indicated by h in the figure can be changed by changing the type of the claw portion, whereby it can be adapted to the thickness of the flange 500 of the foundation pile 50. The position indicated by the dotted ellipse in the figure indicates the clearance between the back surface 213c'of the claw portion 213c and the groove 214c. By eliminating this clearance, the back surface of the claw portion 213c is in contact with the groove 214c. In the case of such a configuration, when the rotational torque at the time of driving the foundation pile 50 (during pile driving) is large, that is, when the foundation pile 50 is driven into hard gravel, bedrock, etc., the force received by the claw portion 213c is applied to the claw portion 213c. And it can be supported not only by the bolt 212c but also by the entire attachment 1A.

Another preferred embodiment is shown at the bottom of FIG. The aspect shown on the lower side of FIG. 2 has a portion in contact with the contact surface 211 on the back surface side of the claw portion 213c-1. In the case of such a configuration as well, the force received by the claw portion 213c when driving the foundation pile 50 can be supported not only by the claw portion 213c and the bolt 212c but also by the entire attachment 1A, as in the configuration that eliminates the clearance. In addition, depending on the usage situation, a preferable claw portion can be adopted from the modes described above.

When the foundation pile 50 placed in the ground is pulled out, the foundation pile 50 is rotated in the direction opposite to the rotation direction of the foundation pile 50 that was rotated when the foundation pile 50 was placed in the ground. In that case, the attachment 1A in which the claw portion 213c is fitted to the groove 214c in the direction opposite to the left-right direction shown in FIG. 2 may be used (the same may be applied to the other claw portions).

The attachment 1A is locked to the flange 500 by fitting the claw portions 213a to 213d into a region of a part of the holes provided in the flange 500 of the foundation pile 50. As a result, the attachment 1A is temporarily fastened to the foundation pile 50.

The protrusion 22 shown in FIG. 1 is a cylindrical protrusion projecting from the center of the contact surface 211. The protrusion 22 has a central axis coaxial with the central axis of the shaft 10 described above. The outer diameter of the protrusion 22 is smaller than the inner diameter of the pile body 501 of the foundation pile 50, and the protrusion 22 is formed from the central opening 5000 provided at the head side of the foundation pile 50 made of steel pipe, specifically, the central portion of the flange 500. , Is inserted into the pile body 501 of the foundation pile 50 and fits into the foundation pile 50. It is desirable that the clearance distance between the outer diameter of the protrusion 22 and the inner diameter of the pipe of the pile body 501 of the foundation pile 50 is small.

A guide 22a (guide portion) is provided at the tip of the protrusion 22. The guide 22a has a conical shape (vertebral body shape) having a tip located on the central axis of the protrusion 22 as an apex. By using the peripheral surface of the conical guide 22a, the protrusion 22 can be smoothly inserted when it is inserted into the pile body 501 from the central opening 5000 of the flange 500.

FIG. 3 is a front view showing a state in which the foundation pile 50 is connected to the driving device 5 of the present embodiment, and a portion where the protrusion 22 is inserted into the foundation pile 50 and is fitted is described. For convenience, it is a perspective view. Further, for convenience of explanation, FIG. 3 shows the central axis of the shaft 10 and the protrusion 22 and the central axis of the foundation pile 50 as C along the left-right direction of the paper surface of FIG.

As shown in FIG. 3, the shaft 10 of the attachment 1A is connected to the auger device 2 attached to the tip of the arm 3 extending from the boom 4 of the hydraulic excavator, and the protrusion 22 is inserted into the foundation pile 50. It is fitted. In the state shown in FIG. 3, the foundation pile 50 is slightly rotated with the upper surface 500a of the flange 500 in contact with the contact surface 211, and the above-mentioned claw portion (in FIG. 2, the claw portion 213a and the claw portion are shown). 213b and the claw portion 213c are shown) in a state of being engaged with a hole provided in the flange 500 of the foundation pile 50.

Below, using FIG. 3, there are some examples in which an excessive load is not locally applied to the attachment 1A of the auger device, and a good temporary fastening with the foundation pile 50 can be realized. To do.

In FIG. 3, the radius D of the contact board 21 (same as the radius of the contact surface 211), illustrates the length L _B of the protrusion 22. The length L _B of the protrusion 22, the boundary position between the flange 500, until the distal most position of the range in contact with the inner wall of the foundation pile 50 is the length. In the present embodiment, the length L _B of the projecting portion 22, and at least 0.8 times to 2 times the radius D of the contact substrate 21. Thereby, it is possible to realize a good temporary fastening with the foundation pile 50. However, the invention is not limited to this range, it may be as the _{L B} of the protruding portion 22 to 0.8 times to 4 times the radius D, preferably, the _{L B} of the protruding portion 22 of radius D 0.8 It may be doubled to tripled. The L _B of the protruding portion 22 and resulting in longer than four times the radius D, since the attachment 1A itself is long and heavy, there is a possibility that the insertion operation or insertion releasing operation is hardly done, the protrusion 22 _{L B} is preferably set to less than 4 times the D.

As another preferred embodiment, with respect to clearance distance d2 between the outer diameter of the inner diameter and the projection 22 of the foundation pile 50 shown in Figure 3, the L _B of the protruding portion 22, and at least 10 times d2. Thereby, it is possible to realize a good temporary fastening with the foundation pile 50. Preferably, the _{L B} of the protruding portion 22 d2 of 15 times or more, more preferably, to 20 times or more. It is assumed that d2 is larger than d1 (that is, d2> d1) when the clearance distance between the upper surface 500a of the flange 500 and the contact surface 211 is d1. Further, the L _B of the protrusion 22, when the length of more than 30 times d2, attachment 1A itself is long and heavy, there is a possibility that the insertion operation or insertion releasing operation is hardly done. Therefore, the length L _B of the protrusion 22 is preferably set to 30 times the length of d2.

As another preferred embodiment, if the total length of the pile body 501 of the foundation pile 50 shown in Figure 3 was L _A, the length L _B of the projecting portion 22, and at least 10% of the length of L _A .. That is, the total length _{L A} of the pile body 501 of the foundation pile 50 and the length _{L B} of the projections 22, the following relationship;
_L _A × 0.1 <L _B
Meet. By making the length of the protrusion 22 the above-mentioned relationship, even if the driving device 5 holds the foundation pile 50 so that the longitudinal direction of the foundation pile 50 is horizontal as shown in FIG. 6, the claw of the attachment 1A The load is not concentrated on the unit 213. Therefore, the foundation pile 50 can be satisfactorily supported (held). This is because the protrusion 22 has a certain length and is fitted with the pile body 501 of the foundation pile 50. As a result, it is possible to avoid applying an excessive bending moment and torque to the fitting portion of the flange 500 and the claw portion 213 of the contact substrate and the protrusion portion 22. Also, the total length _{L A} of the pile body 501 of the foundation pile 50, the relationship between the length _{L B} of the protrusion 22, the following relationship;
_L _A × 0.15 <L _B
It is preferable to meet
_L _A × 0.2 <L _B
It is more preferable to satisfy. When the protrusion 22 has a length of less than 10% of the total length of the pile body 501 of the foundation pile 50, the load may be concentrated on the fitting portion between the flange 500 and the claw portion 213 of the contact substrate. is there. On the other hand, when the protrusion 22 has a length exceeding 20% of the total length of the pile body 501 of the foundation pile 50, the attachment 1A itself becomes long and heavy, and it may be difficult to perform the insertion operation or the insertion release operation. There is sex. Therefore, the length _{L B} of the projections 22 is preferably 20% or less of the length of _{L A.}

Each of the above-exemplified modes can be appropriately selected according to the usage situation, or can be adopted by combining the modes. This makes it possible to satisfactorily connect the foundation pile to the auger device.

In the present embodiment, the mode in which the claw portions 213a to 213d of the attachment 1A are fitted to the flange 500 has been described, but the present invention is not limited to this mode, and the claw portion may not be provided. For example, the contact substrate 21 of the attachment 1A may be provided with a hole through which a bolt can be inserted. Even in a mode in which this hole is overlapped with any of the holes 510a to 510h provided on the upper surface 500a of the flange 500 of the foundation pile 50, and the attachment 1A and the foundation pile 50 are temporarily fastened by bolting. Good.

Also in this aspect, since the attachment 1A is provided with the protrusion 22, the load is not concentrated on the bolt fixing portion as described above. Therefore, it is possible to satisfactorily connect the foundation pile to the auger device without causing seizure or the like, which has been a problem in the past. In addition, there is no seizure at the bolt fixing portion, and it is possible to perform the bolt removal work from the location more smoothly than before.

<Auger device 2>
The driving device 5 (FIG. 3) of the present embodiment includes an auger device 2 to which an attachment 1A is attached to the tip. The auger device 2 is preferably a well-known hydraulic auger device attached to an arm extending from a boom of a hydraulic excavator, but is not limited to the hydraulic auger device, and any auger device such as an engine-driven handy type is used. can do.

<Flood excavator>
The driving device 5 (FIG. 3) of the present embodiment can be realized as a hydraulic excavator (not shown). Specifically, it is provided with a hydraulic excavator having an arm 3 to which the auger device 2 is attached to the tip and a boom 4 connected to the arm 3. As the hydraulic excavator, a conventionally well-known one can be adopted.

<Foundation pile>
The foundation pile will be described below with reference to FIG. FIG. 4 is a schematic view schematically showing the foundation pile. As described above, the present inventors are engaged in research and development of a solar panel pedestal system in which a solar panel pedestal is installed on an independent foundation and the pedestal supports a solar panel. When constructing a large-scale solar panel power plant in a desert area, it is too complicated to install a large number of RC independent foundations at the same ground level, and there are various disadvantages. Not only is the RC casting process complicated, but in dry deserts and gravel areas, the evaporation of water after RC placement is often rapid, and cracks are likely to occur in the RC. The fact that it needs to be cured for a long period of time to increase its strength by a chemical reaction is also unsuitable for rapid construction of large-scale solar panel power plants. Therefore, in a preferred embodiment, a screw pile made of a steel pipe that can be rotationally driven by using an auger device can be used as a base. Therefore, the foundation pile 50 includes a flange 500 and a pile body 501 having a neck portion 502 and a body portion 503 as a main portion. The foundation pile 50 shown at the far right end of FIG. 4 is a screw pile. It is preferable that the foundation pile 50 is provided with a sharp excavation member 505 at the tip of the body portion 503 formed of a cylindrical steel pipe, and further, a spiral rib 504 is provided on the outer periphery of the body portion 503. .. The spiral rib 504 can be provided over an arbitrary length from the tip end portion of the body portion 503 to the upper side, and the spiral rib 504 may be provided on the outer periphery over the entire longitudinal direction of the body portion 503.

Further, in a preferred embodiment, a horizontal stabilizer 506 may be pivotally attached to the foundation pile 50 above the fuselage portion 503. It is preferable that an annular movement blocking ring 507 for limiting the axial movement of the horizontal stabilizing blade 506 is welded and fixed to the outer periphery of the body portion 503 on the upper portion of the horizontal stabilizing blade 506. The flange 500 is preferably welded and fixed to the upper end of the neck 502.

In the horizontal stabilizer 506 described above, four metal fins having a substantially trapezoidal shape in the front view (only

fins

506a, 506c, and 506d are shown in FIG. 4) are projected outward in the radial direction of the fuselage portion 503. It is a thing. These four metal fins are formed by being attached to each other at an angle of 90 degrees in a plan view. Therefore, the metal fins 506a and the metal fins 506c are arranged diagonally to each other, and the metal fins 506d and another metal fin (not shown) are also arranged diagonally to each other.

The flange 500 is preferably formed of a circular metal plate material in a plan view. The flange 500 is provided with the above-mentioned central opening 5000 in the central portion in a plan view and holes 510a to 510h having a substantially L shape in a plan view penetrating from the upper surface to the lower surface of the flange 500.

Each of the substantially L-shaped holes is configured such that a region along the circumferential direction of the flange 500 in a plan view and a region formed over the vicinity of the central opening 5000 and the vicinity of the outer circumference intersect at a substantially right angle. .. The region along the circumferential direction is preferably not a straight line but an arc along the circumference.

Specifically, the substantially L-shaped

holes

510a and 510e are arranged so as to be point-symmetrical with respect to the center point of the flange 500. Similarly, the substantially L-shaped

holes

510b and 510f, the substantially L-shaped

holes

510c and 510g, and the substantially L-shaped

holes

510d and 510h are also arranged so as to be point-symmetrical with respect to the center point of the flange 500, respectively. Therefore, the substantially L-shaped hole 510 is composed of four sets of substantially L-shaped holes arranged so as to be point-symmetrical with respect to the center point of the flange 500.

Further, a straight opening region intersecting a region along the circumferential direction of the substantially L-shaped hole 510a at a substantially right angle, and a straight line intersecting a region along the circumferential direction of the substantially L-shaped hole 510e substantially at a right angle. The opening area is offset and is not arranged on a straight line. The linear opening regions of the other three sets of substantially L-shaped holes are also offset from each other and are not arranged on a straight line. The substantially L-shaped holes 510a to 510h are arranged so as to be rotationally symmetrical by 45 degrees with respect to the center point in the plan view of the flange 500.

The hole 510 formed in the flange 500 is not limited to the L-shape, and may have another shape such as a T-shape. In the embodiment in which the pile is often pulled out, the claw portion shown in FIG. 2 is mounted in the opposite direction, and the auger device is rotated in the reverse direction. In this case, the hole 510 formed in the flange 500 may be substantially L-shaped as described above, but the claw portion can be reliably engaged by forming the hole 510 into a T-shape. it can.

(Modification example of foundation pile)
FIG. 4 also shows a modified example of the foundation pile. Explaining these, the foundation pile 50A does not have the horizontal stabilizing blade 506 as compared with the foundation pile 50 described above. Further, the foundation pile 50B does not have the spiral rib 504 on the outer periphery of the body portion 503 as compared with the foundation pile 50 described above. Further, the foundation pile 50C is not provided with the horizontal stabilizing blade 506, the spiral rib 504, or the excavation member 505 as compared with the foundation pile 50 described above. Since it is not necessary to distinguish between the neck portion 502 and the body portion 503 of the foundation pile 50C, the body portion 503 is abstracted. As the driving device for these various foundation piles, the driving device of the present embodiment can be used.

<Use of foundation piles (joining with solar panel mounts)>
The use of the foundation pile 50 will be described with reference to FIG. FIG. 5 is an exploded perspective view schematically showing a joint structure between the flange 500 of the foundation pile 50 and the support column of the solar panel mount. The vertical member 12 of the solar panel mount is a column made of a hollow metal hollow member, and it is preferable that a mounting plate 320 is welded and fixed to the lower end of each vertical member 12.

The mounting plate 320 is provided with

elongated holes

320a and 320b through which bolts B, which are fastening members, are inserted. The foundation pile 50, which is a screw pile, and the mounting plate 320 are fixed by bolts B and nuts N, which are fastening members. However, when fastening and fixing, in the example of FIG. 5, the elongated hole of the mounting plate 320 is used. The 320a and the substantially L-shaped hole 510h are overlapped with each other, and the respective holes are fastened at the points where the bolts B are inserted. Similarly, the elongated hole 320b of the mounting plate 320 and the substantially L-shaped hole 510d are overlapped with each other, and the respective holes are fastened at the points where the bolts B are inserted.

Therefore, the vertical member 12 in the lateral direction can adjust the angular positions in the front-rear, left-right directions, and the circumferential direction with respect to the flange 500 of the foundation pile 50 within the overlapping range of the

elongated holes

320a and 320b. Even if the location for placing the foundation pile is specified in the desert area, some misalignment often occurs when the pile is driven by the auger device. In the present embodiment, by using a screw pile provided with a flange 500 as a foundation pile, it is possible to adjust the misalignment.

[Summary]
The attachment according to the first aspect of the present invention is an attachment for attaching a foundation pile having a flange to the head of a tubular pile body to an auger device, and is a connection provided with a contact surface that abuts on the upper surface of the flange. parts and, and a projection unit for the pile body and the fitting is inserted into the tube of the pile body at the head side, the length (L _B) of the protrusion, the radius of the contact surface ( It is 0.8 to 2 times that of D).

According to the configuration of the first aspect, even when the auger device holds the foundation pile through the attachment so that the longitudinal direction of the foundation pile is horizontal, a part of the contact surface (claw portion or bolt) of the attachment is used. The load does not concentrate on the fixed part). Therefore, it is necessary to avoid applying an excessive bending moment and torque to a part (locking portion or bolt fixing portion of the claw portion) and the protrusion portion between the upper surface of the flange and the contact surface of the contact substrate. Can be done. Therefore, the foundation pile can be satisfactorily supported (held).

In the attachment according to the second aspect of the present invention, in the first aspect, the protrusion is projected on the contact surface.

In the attachment according to the third aspect of the present invention, in the first or second aspect, the flange of the foundation pile is provided with a hole penetrating from the upper surface to the lower surface, and the connecting portion is provided with a hole from the contact surface. In a state where a penetrating portion penetrating to the back surface of the contact surface is provided at a position overlapping the hole, the protrusion is inserted into the pipe, and the upper surface and the contact surface are in contact with each other. , The hole is bolted at the point where the through portion overlaps.

According to the configuration of the third aspect, since the protrusion has the specified length, an excessive load is not applied to the bolt fixing portion between the flange of the foundation pile and the contact substrate of the attachment. Therefore, it is possible to prevent damage to the bolt fixing portion and seizure of the bolt, and to realize a good connection between the foundation pile and the auger device.

In the attachment according to the fourth aspect of the present invention, in the first to third aspects, the contact surface is provided with a claw portion to be engaged with the flange of the foundation pile, and the protrusion is inserted into the pipe. In addition, the claw portion engages with the flange in a state where the upper surface and the contact surface are in contact with each other.

According to the configuration of the fourth aspect, since the protrusion has the specified length, an excessive load is not applied to the locking portion between the flange of the foundation pile and the contact substrate of the attachment. Therefore, it is possible to prevent the locking portion from being damaged and realize a good connection between the foundation pile and the auger device.

In the attachment according to the fifth aspect of the present invention, in the first to fourth aspects, a vertebral body-shaped guide portion is provided at the tip of the protrusion.

According to the configuration of the fifth aspect, the protrusion can be smoothly inserted into the pipe of the pile body from the head of the foundation pile.

The attachment according to the sixth aspect of the present invention further includes a shaft attached to the auger device and provided with the connecting portion at one end in the first to fifth aspects, and the shaft is the same as the auger device. It can be attached and detached by fastening bolts.

According to the configuration of the above aspect 7, it is possible to provide a highly convenient casting device by providing the attachment as described above.

1A Attachment 2 Auger device 3 Arm 4 Boom 5 Driving device 10 Shaft 20 Connecting part 21 Contact board 22

Protrusion 22a Guide

50, 50A, 50B, 50C Foundation pile 211

Contact surface

212a, 212b, 212c,

212d Bolt

213 , 213a, 213b, 213c, 213d Claw 500 Flange 500a Top 501 Pile body 5000 Center opening

Claims

A foundation pile having a flange on the head of a tubular pile body is an attachment that is interposed between the foundation pile and the auger device in order to attach it to the auger device.
A connecting portion provided with a contact surface that abuts on the upper surface of the flange,
On the head side, a protrusion that is inserted into the pipe of the pile body and fits into the pile body is provided.
The length of the protrusion (L B), the 0.8 times to 2 times the radius of the contact surface (D), attachment.
The attachment according to claim 1, wherein the protrusion is projected on the contact surface.
The flange of the foundation pile is provided with a hole penetrating from the upper surface to the lower surface.
The connecting portion is provided with a penetrating portion penetrating from the contact surface to the back surface of the contact surface at a position where it overlaps with the hole.
According to claim 1 or 2, in a state where the protrusion is inserted into the pipe and the upper surface and the contact surface are in contact with each other, the hole and the through portion are bolted at the overlapped portion. Described attachment.
The contact surface is provided with a claw portion that engages with the flange of the foundation pile.
The method according to any one of claims 1 to 3, wherein the claw portion engages with the flange in a state where the protrusion is inserted into the pipe and the upper surface and the contact surface are in contact with each other. attachment.
The attachment according to any one of claims 1 to 4, wherein a vertebral body-shaped guide portion is provided at the tip of the protrusion.
Further provided with a shaft attached to the auger device and provided with the connecting portion at one end.
The attachment according to any one of claims 1 to 5, wherein the shaft is detachably attached to the auger device by bolting.
With an auger device
A foundation pile driving device comprising the attachment according to any one of claims 1 to 6 attached to the auger device.