JP7409404B2 - Connection members, connection units and pile units - Google Patents

Description

The present invention relates to a connecting member, a connecting unit, and a pile unit.

2. Description of the Related Art Conventionally, there has been known a technique for connecting a plurality of members each having a length shorter than the predetermined length in order to form a member having a predetermined length. For example, Patent Document 1 describes one square steel pipe, the other square steel pipe that fits with the one square steel pipe by inserting the square steel pipe inside, and A connecting device is disclosed that includes a rod-shaped key for maintaining the fitted state with respect to the other square steel pipe.

In the connection device, one square steel pipe has an end face, and the other square steel pipe contacts the end face of the one square steel pipe to a predetermined fitting depth. It has a regulating surface that regulates movement in the fitting direction.

Furthermore, in the connection device, an outer groove is provided on the outer peripheral surface of one of the square steel pipes, and an inner groove is provided on the inner peripheral surface of the other square steel pipe, in which the rod-shaped key is accommodated. It is provided so as to face the outer groove. Further, the other square steel pipe is provided with a threaded hole extending outward from the inner groove and opening outward. In the connection device, one square steel pipe is connected to the other square steel pipe by pushing the rod-shaped key to a position where it straddles the inner groove and the outer groove by rotating the bolt screwed into the screw hole. The fitting depth is restricted from exceeding a predetermined fitting depth.

Japanese Patent Application Publication No. 2001-200596

By the way, as part of foundation work when constructing a building, etc., work is sometimes performed to drive a plurality of axially interconnected pile members into the ground while rotating them. In this case, it is conceivable to apply the connection structure between square steel pipes via a rod-shaped key disclosed in Patent Document 1, for example, to the connection structure between pile members.

However, as mentioned above, a regulating surface is formed on the other square steel tube to regulate the movement of one square steel tube in the fitting direction, and an end surface that comes into contact with the regulating surface is formed on the other square steel tube. be done. In other words, in Patent Document 1, in order to regulate the insertion position of one square steel pipe into the other square steel pipe at a predetermined fitting depth, it is necessary to form a portion with a reduced wall thickness on both steel pipes. There is. For this reason, when the connection structure between steel pipes disclosed in Patent Document 1 is applied to the connection structure between pile members, the strength of each pile member may decrease.

In addition, when connecting one square steel pipe and the other square steel pipe to each other via the rod-shaped key disclosed in Patent Document 1, the outer peripheral surface of one square steel pipe and the other square steel pipe are connected to each other. Grooves are formed on the inner peripheral surface of each of the steel pipes, and screw holes are formed on the outer peripheral surface of the other square steel pipe. That is, in Patent Document 1, each steel pipe is processed to reduce the wall thickness of each steel pipe. For this reason, when the connection structure between steel pipes disclosed in Patent Document 1 is applied to the connection structure between pile members, the strength of each pile member may decrease.

An object of the present invention is to provide each pile in a state in which the depth of engagement of one pile member with respect to the other pile member is regulated to exceed a predetermined depth while suppressing a decrease in the strength of each pile member. An object of the present invention is to provide a connecting member, a connecting unit, and a pile unit that can connect members to each other.

The present invention provides a tubular first pile member having a first inner circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis; a second pile member having a second outer peripheral surface having a shape that can be fitted to the peripheral surface and fitted inside the first pile member; A connection member that connects the first pile member and the second pile member to each other in a state capable of transmitting a rotational force of Provided between the first intersecting surface and the second intersecting surface so as to fill a gap between the first intersecting surface and the opposing second intersecting surface on the second outer circumferential surface of the second pile member. a gap adjustment part, and one of the first pile member and the second pile member such that the fitting depth of the second pile member to the first pile member is deeper than a prescribed fitting depth set in advance. In order to restrict movement to one side in the axial direction along the axis, the gap adjustment part extends in the inner and outer directions from the gap adjustment part and one of the first pile member and the second pile member in the axial direction. A support part that supports one of the first pile member and the second pile member by contacting one end surface, and a fitting depth of the second pile member with respect to the first pile member is set to the prescribed fitting depth. a locking portion extending from the gap adjustment portion to the other side in the inner and outer directions so as to be locked to the other of the first pile member and the second pile member with the support portion positioned such that Provided is a connecting member having the following.

Further, the present invention provides a pile unit including a first tubular structure having a first inner circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis. a pile member; a second pile member having a second outer circumferential surface having a shape that can be fitted to the first inner circumferential surface and fitted inside the first pile member; and the first pile The connecting member is interposed between the member and the second pile member and connects the first pile member and the second pile member to each other in a state capable of transmitting rotational force about the predetermined axis. The present invention provides a pile unit having the following.

In the present invention, with the gap adjustment part disposed between the first intersecting plane and the second intersecting plane, the first pile member and the second pile member are supported by the support part extending from the gap adjusting part in one side in the inner and outer directions. The axis of the support part is supported by a locking part that supports one end surface in one axial direction of the support part, extends from the gap adjustment part to the other side in the inside-outside direction, and locks the other of the first pile member and the second pile member. The position in the direction can be determined. This restricts one of the first pile member and the second pile member from moving in a direction such that the fitting depth of the second pile member with respect to the first pile member becomes deeper than the specified fitting depth. .

Furthermore, in the present invention, the support part and the locking part for regulating the movement as described above are arranged using the dead space between the first intersecting surface and the second intersecting surface. connected by. Therefore, in the present invention, it is possible to restrict the movement of the second pile member with respect to the first pile member described above without performing processing to reduce the wall thickness of each pile member. Therefore, according to the present invention, the fitting depth of the second pile member to the first pile member exceeds a predetermined fitting depth while suppressing a decrease in the strength of the first pile member and the second pile member. The first pile member and the second pile member can be connected in a state where the first pile member and the second pile member are regulated.

The present invention also provides a tubular first pile member having a first internal circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis; a second pile member having a second outer circumferential surface having a shape that can be fitted to the first inner circumferential surface and fitted inside the first pile member; and a second pile member that fits into the first inner circumferential surface. a third pile member having a third outer circumferential surface having a shape that allows the third pile member to be fitted inside the first pile member from the opposite side to the second pile member in the axial direction along the axis; a connection unit for connecting the first pile member and the second pile member, the connection unit being interposed between the first pile member and the second pile member and capable of transmitting rotational force about the predetermined axis; and the second pile member, and the second pile member and the third pile member are connected to each other so as to prevent the second pile member and the third pile member from being separated from each other in the axial direction. A connection unit is provided, which includes a connection member that connects the third pile member.

According to this configuration, since the connecting member restricts the second pile member and the third pile member from being separated from each other in the axial direction, the second pile member is connected to one of the second pile member and the third pile member. The first pile member, the second pile member, and the third pile member can be moved together by applying a force in the direction of separating the member and the third pile member from the other one. Therefore, for example, the first pile member, the second pile member, and the third pile member connected to each other by the connection unit are driven into the ground from the second pile member, and by pulling up the third pile member, the first pile member , the second stake member and the third stake member can be pulled out of the ground.

By the way, as described above, the second pile member and the third pile member are inserted inside the first pile member. Here, when the connecting member connecting the second pile member and the third pile member is formed in a state exposed to the outside in the first pile member, the second pile member, and the third pile member, the connecting member is The resistance generated when driving the first pile member, the second pile member, and the third pile member into the ground is increased.

Therefore, in the connection unit, one of the second pile member and the third pile member is provided within the range of the cross-sectional shape of one of the second pile member and the third pile member perpendicular to the axial direction. The other of the second pile member and the third pile member is provided within the range of the cross-sectional shape of the other of the second pile member and the third pile member perpendicular to the axial direction. an attachment portion having a shape that allows the connecting member to be attached to the attached portion within a cross-sectional shape of one of the second pile member and the third pile member; an extension part having a length that can reach the engaged part from the attachment part through the inside of the first pile member; and an extension part connected to the extension part and connected to the second pile member and the third pile. It is preferable that the engagement part has a shape that can be engaged with the engaged part within the range of the other cross-sectional shape of the member.

According to this configuration, since the connecting member can be placed within the range of the cross-sectional shapes of the second pile member and the third pile member, the first pile member, the second pile member, and the third pile member are driven into the ground. This can prevent the connecting member from increasing the resistance that would otherwise occur.

By the way, when driving pile members into the ground as part of foundation work when constructing a building, etc., one pile member with a predetermined cross-sectional shape is driven, and if the driving depth of the pile member is insufficient, the Connect another pile member to the pile member and drive it further. The above work assumes driving a single pile member with a predetermined cross-sectional shape, so the resistance that the pile member receives from the ground and the rigidity required of the pile member when driving the pile member into the ground are calculated. In consideration, it is preferable that the cross-sectional shape of another pile member connected to the previously driven pile member be close to the cross-sectional shape of the previously driven pile member.

SUMMARY OF THE INVENTION Therefore, the present invention provides a pile unit having a first tubular structure having a first inner circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis. a second pile member having a second outer circumferential surface having a shape capable of fitting into the first inner circumferential surface and fitted inside the first pile member; It has a third outer peripheral surface having a shape that can be fitted to the peripheral surface, and is fitted inside the first pile member from the opposite side to the second pile member in the axial direction along the axis. It has a third pile member, and the connection unit that connects the first pile member, the second pile member, and the third pile member, and the third pile member is connected to the second pile member. A pile unit having the same cross-sectional shape as a member is provided.

In the present invention, the second pile member and the third pile member having the same cross-sectional shape can be connected via the connection unit. For this reason, compared to the case where the cross-sectional shapes of the second pile member and the third pile member are different, changes in resistance that occur when driving the pile unit into the ground, and changes in the resistance between the second pile member and the third pile Differences in rigidity of members can be suppressed.

Moreover, in the present invention, common parts can be used as the second pile member and the third pile member. Therefore, the manufacturing cost of the pile unit is reduced.

By the way, as mentioned above, a gap is formed between the first intersecting plane and the second intersecting plane. Here, when the second pile member and the third pile member have the same cross-sectional shape, a gap is also formed between the first pile member and the third pile member.

Therefore, the pile unit includes the first intersecting plane, and a third intersecting plane facing the first intersecting plane on the third outer circumferential surface of the third pile member fitted to the first pile member, It is preferable to further include a gap adjustment member provided between the first intersecting surface and the third intersecting surface so as to fill the gap therebetween.

According to this configuration, the gap between the first intersecting plane and the third intersecting plane can be filled with the gap adjusting member. Therefore, rotational force can be efficiently transmitted between the first pile member and the third pile member.

By the way, when using the above-mentioned pile unit, the first pile member is regarded as an element responsible for part of the length to be inserted into the ground, and the total length of the first pile member, second pile member, and third pile member is (The length excluding the fitting depth between the pile members) can be managed as the penetration depth of the pile. On the other hand, the first pile member is regarded as an element for connecting the second pile member and the third pile member, and the total length of the second pile member and the third pile member is managed as the length that is inserted into the ground. If it is possible to do so, the depth of penetration into the ground can be managed at the site using only the lengths of the second and third pile members that have the same cross-sectional shape, improving management efficiency. do.

Therefore, in the pile unit, the cross-sectional shape of the first inner peripheral surface is constant over the entire length in the axial direction, and the total length in the axial direction of the first pile member is the same as that of the second pile member and the third pile member. It is preferable that the length is shorter than the total length of the pile member in the axial direction.

According to this configuration, since the cross-sectional shape of the first inner circumferential surface is constant over the entire length in the axial direction, the second pile member and the third pile member can be butted against each other inside the first pile member. . That is, the first pile member can be used as an element for connecting the second pile member and the third pile member. Furthermore, since the total length of the first pile member is shorter than the total length of the second and third pile members, in a state where the second and third pile members are butted together, the opposite end of the butted ends of both pile members The end portion can be exposed to the outside of the first pile member. Therefore, according to the aspect, the total length of the second pile member and the third pile member can be managed as the penetration depth of the pile unit into the ground.

The connecting member is configured to connect the first pile member and the second pile member with respect to one of the first pile member and the second pile member whose movement to one side in the axial direction is restricted by the support portion. A first restricting means that is locked so that movement of one of the connecting members in the axial direction in the axial direction is restricted to the other of the first pile member and the second pile member. It is preferable to further include a second restricting means that is locked so that movement of the to the other side is restricted.

According to this configuration, the first regulating means regulates that one of the first pile member and the second pile member and the connecting member are separated from each other in the axial direction, and the connecting member, the first pile member, and the second The second regulating means regulates that the other pile member separates from each other in the axial direction. Therefore, by applying a force in the direction of separating one of the first pile member and the second pile member from the other of the first pile member and the second pile member, the first pile member and the second pile member are brought together. It can be moved by Therefore, for example, by pulling up the first pile member with the first pile member and the second pile member connected to each other by the connecting member driven into the ground from the second pile member, the first pile member and the second pile member can be pulled out of the ground.

In the connection member, the first pile member has a tubular first body portion having the first inner circumferential surface, and a first protrusion portion that protrudes outward from the first body portion, and The two-pile member includes a second body portion having the second outer circumferential surface, and a second protrusion portion that protrudes outward from the second body portion, and the first restriction means is configured to control the first protrusion portion. and a first locking portion that locks one of the second protruding portions so that movement of one of the first pile member and the second pile member toward the other side in the axial direction is restricted. The second restricting means includes a second lock that locks the other of the first protrusion and the second protrusion so that movement of the connecting member toward the other side in the axial direction is restricted. It is preferable to have a stop portion.

According to this configuration, the first restricting means is engaged with one of the first protruding portion protruding from the first main body portion and the second protruding portion protruding from the second main body portion, and the second restricting means is engaged with one of the first protruding portion protruding from the first main body portion and the second protruding portion protruding from the second main body portion. The first protrusion protrudes from the second body part and the second protrusion protrudes from the second body part. Therefore, one of the first pile member and the second pile member and the connecting member are regulated from being separated from each other in the axial direction without performing processing to reduce the wall thickness of the first pile member and the second pile member. At the same time, it is possible to prevent the other of the first pile member and the second pile member and the connection member from separating from each other in the axial direction.

According to the present invention, each pile is controlled in a state where the fitting depth of one pile member with respect to the other pile member is regulated to exceed a predetermined fitting depth while suppressing a decrease in the strength of each pile member. Members can be connected to each other.

1 is an exploded perspective view showing the overall configuration of a pile unit according to Embodiment 1. FIG. It is a sectional view showing a state where a second pile member and a third pile member are connected to the first pile member in the pile unit according to Embodiment 1. It is a top view which shows the state where the connection member was attached to the 2nd pile member in the pile unit based on Embodiment 1. It is a perspective view of the connection member which the pile unit concerning Embodiment 1 has. It is a side view for explaining a method of connecting a first pile member, a second pile member, and a third pile member in the pile unit according to Embodiment 1, and shows a state in which a connection member is attached to the second pile member. . It is a side view for explaining the method of connecting a first pile member, a second pile member, and a third pile member in the pile unit according to Embodiment 1, and the third pile member is inserted into the first pile member. Indicates the condition. It is a side view for explaining the method of connecting a first pile member, a second pile member, and a third pile member in the pile unit concerning Embodiment 1, and shows the state where an engaging part passed through a through hole. It is a side view for explaining the method of connecting a first pile member, a second pile member, and a third pile member in the pile unit concerning Embodiment 1, and is a side view for explaining a method of connecting a first pile member, a second pile member, and a third pile member. Shows the state in which the members are connected. It is a side view which shows the state where the 2nd pile member was connected to the 3rd pile member and the 4th pile member in the pile unit based on Embodiment 1. FIG. 2 is an exploded perspective view showing the overall configuration of a pile unit according to a second embodiment. It is a sectional view showing the state where the second pile member was connected to the first pile member in the pile unit concerning Embodiment 2. It is a top view which shows the state in which the connection member was attached to the 2nd pile member in the pile unit based on Embodiment 2. It is a perspective view of the connection member which the pile unit concerning Embodiment 2 has. It is a schematic diagram which shows the state at the time of a pair of connection piece being attached to a 2nd pile member in the pile unit based on Embodiment 2. FIG. 7 is a side view showing an engaging portion and an engaged portion according to Embodiment 3; It is a sectional view showing a state at the time of a second pile member being connected to a third pile member in Embodiment 3. It is a sectional view of the pile unit concerning the modification of Embodiment 2, and shows the state where the fourth pile member was connected to the second pile member. FIG. 7 is a perspective view showing a connection member (connection piece) according to a modification of the second embodiment. It is a side view based on the modification of Embodiment 1 and 3, and is a side view which shows a mode that a clearance adjustment member is attached to a 1st pile member.

Hereinafter, connection members, connection units, and pile units according to embodiments of the present invention will be described in detail. Note that the following embodiments are examples that embody the present invention, and do not limit the technical scope of the present invention.

(Embodiment 1)
The configuration of a pile unit 100 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 4. In the following description, the downward direction in the paper plane of FIGS. 1 to 4 is defined as one side in the axial direction, and the upward direction in the paper plane of FIGS. 1 to 4 is defined as the other side in the axial direction.

The pile unit 100 according to this embodiment is driven into the ground while being subjected to a rotational force about a predetermined axis AX. In this embodiment, a rotational force centered on a predetermined axis AX acts on a third pile member 30, which will be described later. As shown in FIG. 1, the pile unit 100 according to the present embodiment includes a tubular first pile member 10 extending along the axial direction in which the axis AX extends, and a first pile member 10 extending along the axial direction from one side in the axial direction. A second pile member 20 that is fitted into the first pile member 10, and a third pile member that extends along the axial direction and is fitted into the first pile member 10 from the opposite side to the second pile member 20 in the axial direction. 30, four gap adjustment members 40 for filling the gap created between the third pile member and the first pile member fitted to the first pile member, the first pile member 10 and the second pile member 20. and a connection unit 90 that connects the third pile member 30 and the third pile member 30.

The first pile member 10 is fitted into the second pile member 20 and the third pile member 30 so as to receive the rotational force acting on the third pile member 30 and transmit this rotational force to the second pile member 20. ing. The first pile member 10 has a first inner circumferential surface 11 including a first intersecting surface 12 having an angle that intersects with a circular locus centered on the axis AX. Specifically, the first pile member 10 has a first inner circumferential surface 11 that appears in a rectangular shape in plan view, and the first inner circumferential surface 11 includes four first intersecting surfaces 12. By inserting the second pile member 20 and the third pile member 30 inside the first inner peripheral surface 11, the second pile member 20 and the third pile member 30 fit into the first pile member 10. .

In addition, in this embodiment, the fitting depth of the second pile member 20 with respect to the first pile member 10 is set beforehand. Below, the preset fitting depth of the second pile member 20 with respect to the first pile member 10 will be referred to as a prescribed fitting depth.

Although not shown, the cross-sectional shape of the first inner circumferential surface 11 is constant over the entire length in the axial direction, and the total length in the axial direction of the first pile member 10 is the same as that of the second pile member 20 and the third pile. It is shorter than the total length of the member 30 in the axial direction.

The second pile member 20 is fitted into the first pile member 10 and connected to the third pile member 30 via the first pile member 10. As shown in FIG. 1, the second pile member 20 is attached to a tubular second body portion 24 extending in the axial direction, and to the other end of the second body portion 24 in the axial direction, and is perpendicular to the axial direction. It has an engaged portion 26 provided within the range of the cross-sectional shape of the second pile member 20. The second main body portion 24 has a shape that can be fitted to the first inner circumferential surface 11 of the first pile member 10 and has a second outer circumferential surface 23 that is fitted inside the first inner circumferential surface 11 . The second outer circumferential surface 23 has a similar shape to the first inner circumferential surface 11 . The second outer circumferential surface 23 includes a second intersecting surface 22 that faces the first intersecting surface 12 of the first piling member 10 when the second piling member 20 is fitted inside the first piling member 10 . Specifically, the second main body portion 24 has a second outer circumferential surface 23 that appears in a rectangular shape in a plan view, and the second outer circumferential surface 23 includes four second intersecting surfaces 22. In this embodiment, the first intersecting surface 23 is inserted into the first inner circumferential surface 11 so that a gap is formed between the first intersecting surface 12 and the second intersecting surface 22. The dimensions of the pile member 10 and the second pile member 20 are designed. Thereby, even if, for example, there is a dimensional error in the diameter of the second outer circumferential surface 23, the gap allows the two pile members to fit together. Further, as shown in FIGS. 1 and 3, the second main body portion 24 has a second inner circumferential surface 21 that has a shape similar to the second outer circumferential surface 23 and is surrounded by the second outer circumferential surface 23. . As shown in FIGS. 1 and 3, the engaged portion 26 is attached to the second main body portion 24 so as to extend between the second inner circumferential surfaces 21 facing each other. The engaged portion 26 is formed with a through hole HL that passes through the engaged portion 26 in the axial direction and extends in a direction perpendicular to the axial direction when viewed in the axial direction. The engaged portion 26 is fixed to the second inner circumferential surface 21 by, for example, welding.

The third pile member 30 is fitted into the first pile member 10 and connected to the second pile member 20 via the first pile member 10. The third pile member 30 includes a third main body part 34 having the same cross-sectional shape as the second main body part 24, and a third main body part 34 that is attached to one end in the axial direction of the third main body part 34 and is perpendicular to the axial direction. It has an attached portion 36 provided within the range of the cross-sectional shape of the three-pile member 30. The third main body portion 34 has a shape that can be fitted to the first inner circumferential surface 11 of the first pile member 10 and has a third outer circumferential surface 33 that is fitted inside the first inner circumferential surface 11 . The third outer peripheral surface 33 has a shape similar to the first inner peripheral surface 11. The third outer peripheral surface 33 includes a third intersecting surface 32 that faces the first intersecting surface 12 of the first piling member 10 when the third piling member 30 is fitted inside the first piling member 10 . Specifically, the third main body portion 34 has a third outer circumferential surface 33 that appears in a quadrangular shape in a plan view, and the third outer circumferential surface 33 includes four third intersecting surfaces 32. As described above, since the third main body portion 34 has the same cross-sectional shape as the second main body portion 24, a gap is formed between the first pile member 10 and the third pile member 30. Further, as shown in FIG. 1, the third main body portion 34 has a third inner circumferential surface 31 that has a similar shape to the third outer circumferential surface 33 and is surrounded by the third outer circumferential surface 33. As shown in FIG. 1, the attached portion 36 is attached to the third main body portion 34 so as to extend between the third inner circumferential surfaces 31 facing each other. The attached portion 36 is fixed to the third inner circumferential surface 31 by using a method such as welding, for example.

As shown in FIG. 2, a gap adjusting member 40 is provided in the gap between the first intersecting surface 12 of the first piling member 10 and the third intersecting surface 32 of the third piling member 30 to fill the gap. It will be done. The gap adjusting member 40 is provided in the gap between the first intersecting surface 12 and the third intersecting surface 32 for each of the four pairs of the first intersecting surface 12 and the third intersecting surface 32. Further, each gap adjustment member 40 is formed of, for example, a metal plate. Note that each gap adjustment member 40 may be formed of resin or the like.

Next, the connection unit 90 will be explained. The connection unit 90 includes a connection member 1 that connects the first pile member 10 and the second pile member 20, and a connection member 80 that connects the second pile member 20 and the third pile member 30.

The connection member 1 is interposed between the first pile member 10 and the second pile member 20, and connects the first pile member 10 and the second pile member 20 in a state where rotational force about the axis AX can be transmitted. Connecting. As shown in FIGS. 1 and 4, the connecting member 1 includes a gap adjusting section 50 provided between the first intersecting surface 12 and the second intersecting surface 22, and a supporting section 60 that supports the first pile member 10. , and a locking portion 70 that is locked to the second pile member 20. The connecting member 1 is formed of, for example, a metal plate. Note that the connecting member 1 may be formed of resin or the like.

The gap adjustment section 50 is provided between the first intersecting surface 12 and the second intersecting surface 22 so as to fill the gap between the first intersecting surface 12 and the second intersecting surface 22. As shown in FIG. 1, the connection member 1 according to the present embodiment is arranged in each gap between four first intersecting surfaces 12 and four second intersecting surfaces 22, and has four gaps extending in the axial direction. It has an adjustment section 50.

The support part 60 is located at one side in the axial direction of the first pile member 10 and the second pile member 20 such that the fitting depth of the second pile member 20 with respect to the first pile member 10 is deeper than the prescribed fitting depth. Regulate movement to the side. Here, the support part 60 is configured to move the first pile member 10 to one side in the axial direction so that the fitting depth of the second pile member 20 with respect to the first pile member 10 exceeds a prescribed fitting depth. to regulate. As shown in FIG. 1, the connection member 1 according to the present embodiment has a gap adjusting portion 50 in the axial direction in order to contact the first one side end surface 15 on one side in the axial direction of the first pile member 10. It has four support parts 60 extending from one end in the outward direction (in the direction away from the axis AX). By these support parts 60 contacting the first one side end surface 15 and supporting the first pile member 10, the relative relationship of the first pile member 10 to the second pile member 20 such that the specified fitting depth is exceeded. movement is regulated.

The locking part 70 locks the first pile member 10 and the second pile member in a state where the support part 60 is positioned so that the fitting depth of the second pile member 20 with respect to the first pile member 10 becomes a prescribed fitting depth. 20.

In this embodiment, the locking part 70 is locked to the second stake member 20 in order to position the support part 60. As shown in FIG. 1, the connection member 1 according to the present embodiment has four locking parts 70 extending inward (in a direction approaching the axis AX) from the other end in the axial direction of each gap adjustment part 50. have These locking portions 70 contact the second other side end surface 25 on the other axial side of the second pile member 20 from the other side in the axial direction, thereby preventing the connecting member 1 from moving to one side in the axial direction. It is locked to the second stake member 20 so that movement is restricted. In addition, as shown in FIG.1 and FIG.4, in this embodiment, the four locking parts 70 are each mutually connected. Although not shown, the four locking portions 70 may be independent from each other.

Note that the object to which the locking portion 70 locks is not limited to the second other side end surface 25, and the second other side end surface 25 is located in the area inside the second intersecting surface 22 of the second pile member 20. If there is a separate lockable part (for example, the engaged part 26), that part can also be used.

The connecting member 80 connects the second pile member 20 and the third pile member 30 so as to prevent the second pile member 20 and the third pile member 30 from separating from each other in the axial direction. As shown in FIGS. 1 and 2, the connecting member 80 includes an attaching portion 81 having a shape that can be attached to the attached portion 36 within a cross-sectional shape orthogonal to the axial direction of the third pile member 30, and an attaching portion an extending portion 82 having a length capable of reaching the engaged portion 26 of the second pile member 20 from the inside of the first pile member 10 from the first pile member 10; and an engaging portion 83 having a shape capable of engaging with the engaged portion 26 within the range of the cross-sectional shape. The extending portion 82 has a shape that can be inserted into the through hole HL of the engaged portion 26 in the axial direction and rotatable around the axis AX within the through hole HL. The engaging portion 83 can pass through the through hole HL at a predetermined rotational position (hereinafter referred to as a passing position) around the axis AX, and a position rotated by a predetermined angle from the passing position around the axis AX (hereinafter referred to as an engaging part). It has a shape that extends in a direction perpendicular to the axial direction when viewed in the axial direction so that it cannot pass through the through hole HL at the position (position). Note that the attachment portion 81 may be fixed to the attachment portion 36 by using a method such as welding, or may be detachably attached to the attachment portion 36 with a bolt or the like.

Here, a method for connecting the first pile member 10, second pile member 20, and third pile member 30 will be described with reference to FIGS. 5A to 5D.

First, as shown in FIG. 5A, step S1 is performed to attach the connecting member 1 to the second pile member 20 from the other side in the axial direction. Specifically, with the attitude of the connecting member 1 in the circumferential direction centered on the axis AX being adjusted such that the four gap adjusting parts 50 face the four second intersecting surfaces 22, the locking part 70 is moved to the second intersecting surface 22. It is attached to the other side end surface 25. Thereby, the support portion 60 is positioned at a predetermined position.

Subsequently, as shown in FIG. 5B, step S2 of covering the outside of the third stake member 30 with the first stake member 10 is performed. In this step S2, the first pile member 10 is placed on the outside of the third pile member 30 so that the engaging portion 83 is exposed on one side in the axial direction of the first pile member 10.

Subsequently, step S3 is performed in which the connecting member 80 is engaged with the engaged portion 26 while maintaining the state of step S2. Specifically, as shown in FIG. 5B, the engaging portion 83 of the connecting member 80 is configured such that the engaging portion 83 of the connecting member 80 can pass through the through hole HL provided in the engaged portion 26 of the second pile member 20. The third pile member 30 is moved to one side in the axial direction while the third pile member 30 is positioned at the passing position (see arrow B1 in FIG. 5B).

Next, as shown in FIG. 5C, the third stake member 30 is rotated relative to the second stake member 20 by a predetermined angle (for example, 90 degrees) with the engaging portion 83 passing through the through hole HL. (Rotate to engaged position). As a result, the engaging portion 83 of the connecting member 80 engages with the engaged portion 26, and movement of the second stake member 20 and the third stake member 30 in the direction away from each other is restricted.

Subsequently, as shown in FIG. 5D, the first pile member 10, the second pile member 20, and the third pile are connected in a state in which rotational force around the axis AX can be transmitted while maintaining the engaged state of step S3. Step S4 of connecting the members 30 is performed. Specifically, the third pile member 30 and the second pile member 20 are pivoted so that the third one side end surface 35 on one side in the axial direction of the third pile member 30 butts against the second other side end surface 25. move closer to each other in the direction. Furthermore, the first pile member 10 is fitted into the second pile member 20 to a predetermined fitting depth position. That is, the first pile member 10 is externally fitted onto the second pile member 20 to the fitting depth position where the first pile member 10 contacts the support portion 60 of the connection member 1 . In this step S4, since the first pile member 10, the second pile member 20, and the third pile member 30 are connected in a state where the rotational force about the axis AX can be transmitted, the rotational force is applied to the third pile member 30. acts, the connected state between the second pile member 20 and the third pile member 30 (the state in which the third pile member 30 is rotated by a predetermined angle relative to the second pile member 20) is maintained. be done. Therefore, by applying a force in the pulling direction to the third pile member 30, the entire pile unit 100 can be pulled out from the ground.

Note that by using a method similar to the above method, one of the second pile member 20 and the third pile member 30 is separated from the other of the second pile member 20 and the third pile member 30. can be connected axially. For example, by using a method similar to the method described above, the fourth pile member 95 to which the blade 96 for excavating the ground is attached can be connected to the second pile member 20 in the axial direction ( (see Figure 5E). At this time, the second pile member 20 and the fourth pile member 95 are fitted into a first pile member 10 different from the first pile member 10 into which the second pile member 20 and the third pile member 30 are fitted. It is connected by On the other hand, a blade 96 for excavating the ground can also be provided to the second pile member 20.

Next, the features and effects of the pile unit 100 according to the present embodiment described above will be listed.

In this embodiment, with the gap adjustment part 50 disposed between the first intersecting surface 12 and the second intersecting surface 22, the support part 60 extending from the gap adjusting part 50 to one side in the inner and outer direction It supports one end face in the axial direction of the member 10 and the second pile member 20, and extends from the gap adjustment part 50 to the other side in the inner and outer directions, and also extends to the other side of the first pile member 10 and the second pile member 20. The position of the support part 60 in the axial direction can be determined by the locking part 70. As a result, one of the first pile member 10 and the second pile member 20 moves in a direction such that the fitting depth of the second pile member 20 with respect to the first pile member 10 becomes deeper than the specified fitting depth. is regulated.

Furthermore, in this embodiment, the support part 60 and the locking part 70 for regulating the movement as described above are arranged using the dead space between the first intersecting surface 12 and the second intersecting surface 22. They are connected by a gap adjusting section 50. Therefore, in this embodiment, the movement of the second pile member 20 with respect to the first pile member 10 described above can be restricted without performing processing to reduce the wall thickness of each pile member. Therefore, according to the present embodiment, the fitting depth of the second pile member 20 with respect to the first pile member 10 is set to a predetermined fitting depth while suppressing a decrease in the strength of the first pile member 10 and the second pile member 20. The first pile member 10 and the second pile member 20 can be connected in a state where exceeding the depth is regulated.

Further, in this embodiment, since the connecting member 80 restricts the second pile member 20 and the third pile member 30 from separating from each other in the axial direction, one of the second pile member 20 and the third pile member 30 To move the first pile member 10, the second pile member 20, and the third pile member 30 together by applying a force in a direction to separate the second pile member 20 and the third pile member 30 from the other one. I can do it. Therefore, for example, with the first pile member 10, second pile member 20, and third pile member 30 connected to each other by the connection unit 90 being driven into the ground from the second pile member 20, the third pile member 30 can be pulled up. Accordingly, the first pile member 10, the second pile member 20, and the third pile member 30 can be pulled out from the ground.

Moreover, in this embodiment, since the connecting member 80 can be accommodated within the range of the cross-sectional shapes of the second pile member 20 and the third pile member 30, the first pile member 10, the second pile member 20, and the third pile member It is possible to prevent the connecting member 80 from increasing the resistance that occurs when driving the pile member 30 into the ground.

Moreover, in this embodiment, the second pile member 20 and the third pile member 30 having the same cross-sectional shape can be connected via the connection unit 90. For this reason, compared to the case where the cross-sectional shape of the second pile member 20 and the cross-sectional shape of the third pile member 30 are different, the change in resistance that occurs when driving the pile unit 100 into the ground, and the change in the resistance of the second pile member 20 And the difference in rigidity of the third pile member 30 can be suppressed.

Moreover, in this embodiment, common parts can be used as the second pile member 20 and the third pile member 30. Therefore, the manufacturing cost of the pile unit 100 is reduced.

Further, in this embodiment, the gap between the first intersecting surface 12 and the third intersecting surface 32 can be filled by the gap adjusting member 40. Therefore, rotational force can be efficiently transmitted between the first pile member 10 and the third pile member 30.

Further, in this embodiment, since the cross-sectional shape of the first inner peripheral surface 11 is constant over the entire length in the axial direction, the second pile member 20 and the third pile member 30 are connected inside the first pile member 10. Can be matched. That is, the first pile member 10 can be used as an element for connecting the second pile member 20 and the third pile member 30. Furthermore, since the total length of the first pile member 10 is shorter than the total length of the second and third pile members 20 and 30, when the second and third pile members 20 and 30 are butted together, the two pile members are butted. The end opposite to the opposite end can be exposed to the outside of the first pile member 10. Therefore, according to the aspect, the total length of the second pile member 20 and the third pile member 30 can be managed as the penetration depth of the pile unit 100 into the ground.

(Embodiment 2)
Next, the configuration of the pile unit 200 according to the second embodiment of the present invention will be described with reference to FIGS. 6 to 10. In the following description, the downward direction in the paper plane of FIGS. 6 to 10 is defined as one side in the axial direction, and the upward direction in the paper plane of FIGS. 6 to 10 is defined as the other side in the axial direction.

The pile unit 200 according to this embodiment is embedded in the ground while being subjected to a rotational force about a predetermined axis AX. In this embodiment, a rotational force centered on a predetermined axis AX acts on the first pile member 110, which will be described later. As shown in FIG. 6, the pile unit 200 includes a tubular first pile member 110 extending along the axial direction in which the axis AX extends, and a tubular first pile member 110 extending along the axial direction and connected to the first pile member 110 from one side in the axial direction. It has a second pile member 120 that is fitted, and a connection member 101 that connects the first pile member 110 and the second pile member 120.

The first pile member 110 is connected to the second pile member 120 via the connection member 101. The first pile member 110 includes a tubular first body portion 114 that extends in the axial direction, and a first protrusion portion 116 that extends outward from the first body portion 114 and has the other side end surface 118 facing the other side in the axial direction. has. As shown in FIG. 6, the first main body portion 114 has a first inner circumferential surface 111 including a first intersecting surface 112 having an angle such that it intersects with a locus of a circle centered on the axis AX. Further, the first inner circumferential surface 111 is a first intersecting surface 117 different from the first intersecting surface 112, and has an angle intersecting the locus of a circle centered on the axis AX. Includes intersecting plane 117. Specifically, the first main body portion 114 has a first inner circumferential surface 111 that appears in a rectangular shape in a plan view, and the first inner circumferential surface 111 has two first intersecting surfaces 112 facing each other and two first intersecting surfaces 112 facing each other. Two separate first intersecting planes 117 are included. By inserting the second pile member 120 inside the first inner peripheral surface 111, the second pile member 120 fits into the first pile member 110.

In addition, in this embodiment, the fitting depth of the second pile member 120 with respect to the first pile member 110 is set beforehand. Below, the preset fitting depth of the second pile member 120 to the first pile member 110 will be referred to as a prescribed fitting depth.

The second pile member 120 is fitted into the first pile member 110 and is connected to the first pile member 110 via the connection member 101. As shown in FIG. 6, the second pile member 120 has a tubular second body portion 124 extending in the axial direction, and a second protrusion portion 128 extending outward from the second body portion 124. The second main body portion 124 has a shape that can be fitted to the first inner circumferential surface 111 of the first pile member 110 and has a second outer circumferential surface 123 that is fitted inside the first inner circumferential surface 111 . The second outer peripheral surface 123 has a shape similar to the first inner peripheral surface 111. The second outer circumferential surface 123 includes a second intersecting surface 122 that faces the first intersecting surface 112 of the first piling member 110 when the second piling member 120 is fitted inside the first piling member 110, and a second intersecting surface 122 that faces the first intersecting surface 112 of the first piling member 110. The pile member 120 is fitted inside the first pile member 110 and includes a separate first intersecting surface 117 and a separate second intersecting surface 127 opposite to each other. Specifically, the second main body portion 124 has a second outer circumferential surface 123 that appears in a rectangular shape in a plan view, and the second outer circumferential surface 123 includes two second intersecting surfaces 122 that face each other and two intersecting surfaces 122 that face each other. Two separate second intersecting planes 127 are included. In this embodiment, the second outer circumferential surface 123 is inserted inside the first inner circumferential surface 111, and between the first intersecting surface 112 and the second intersecting surface 122, and with another first intersecting surface 117. The dimensions of the first pile member 110 and the second pile member 120 are designed so that a gap is formed between them and the other second intersecting surface 127. Thereby, even if, for example, there is a dimensional error in the diameter of the second outer circumferential surface 123, the gap allows the two pile members to fit together. In the gap between the first intersecting surface 112 and the second intersecting surface 122, a gap adjusting section 150, which will be described later, of the connecting member 101 is provided. In the gap between the separate first intersecting surface 117 and the separate second intersecting surface 127, a separate gap adjusting section 185, which will be described later, of the connecting member 101 is provided. As shown in FIGS. 6 and 8, the second protrusion 128 includes a first portion 128A extending outward from the second main body portion 124, and a second portion 128B extending from the first portion 128A in a direction perpendicular to the axial direction. has. Specifically, the first portion 128A protrudes outward from the intermediate portion of the second intersecting surface 127 in a direction perpendicular to the axial direction. The second portion 128B extends from the outer end of the first portion 128A along another second intersecting surface 127 in a direction perpendicular to the axial direction. Therefore, a gap is formed between the second main body portion 124 and the second portion 128B when viewed in the axial direction. Further, as shown in FIG. 8, the second portion 128B has one side end surface 129 facing one side in the axial direction.

The connecting member 101 is interposed between the first pile member 110 and the second pile member 120, and connects the first pile member 110 and the second pile member 120 in a state in which rotational force about the axis AX can be transmitted. Connecting. The connecting member 101 according to this embodiment has a pair of connecting pieces 105 that are attached to the second pile member 120 so as to approach each other from directions orthogonal to the axial direction (see FIGS. 9 and 10). A pair of connection pieces 105 each include a gap adjusting section 150 provided between the first intersecting surface 112 and the second intersecting surface 122, a supporting section 160 that supports the first pile member 110, and an axis of the supporting section 160. It has a locking part 170 that determines the position in the direction, a first restriction means 181 that is locked to the first protrusion 116 , and a second restriction means 182 that is locked to the second projection 128 . The pair of connection pieces 105 are formed of, for example, metal plates. Note that both connecting pieces 105 may be formed of resin or the like. In this embodiment, since both connecting pieces 105 have substantially the same configuration, the configuration of only one connecting piece 105 will be described below.

The gap adjustment section 150 is provided between the first intersecting surface 112 and the second intersecting surface 122 so as to fill the gap between the first intersecting surface 112 and the second intersecting surface 122.

The support part 160 is located at one of the first pile member 110 and the second pile member 120 in the axial direction such that the fitting depth of the second pile member 120 with respect to the first pile member 110 is deeper than the specified fitting depth. Regulate movement to the side. Here, the support part 160 is configured to move the first pile member 110 to one side in the axial direction so that the fitting depth of the second pile member 120 with respect to the first pile member 110 exceeds a specified fitting depth. to regulate. As shown in FIG. 6 , the support portion 160 extends from one end in the axial direction of the gap adjustment portion 150 in order to contact the first one side end surface 115 on one side in the axial direction of the first pile member 110 . Extends in the outward direction (direction away from axis AX). By supporting the first pile member 110 while the support portion 160 is in contact with the first end surface 115, the relative position of the first pile member 110 with respect to the second pile member 120 that exceeds the specified fitting depth is prevented. Movement will be regulated.

The locking part 170 locks the first pile member 110 and the second pile member in a state where the support part 160 is positioned so that the fitting depth of the second pile member 120 with respect to the first pile member 110 becomes a specified fitting depth. 120. Here, the locking part 170 is locked to the second stake member 120 in order to position the support part 160. As shown in FIG. 6, the locking portion 170 extends inward (in a direction approaching the axis AX) from the other end in the axial direction of the gap adjustment portion 150. The locking portion 170 contacts the second other side end surface 125 on the other axial side of the second pile member 120 from the other side in the axial direction, thereby causing the connection piece 105 to move to one side in the axial direction. It is locked to the second stake member 120 so that movement is restricted. Note that the object that the locking portion 170 locks is not limited to the second other side end surface 125, and the second other side end surface 125 is located in the area inside the second intersecting surface 122 of the second pile member 120. If it has a separate lockable part, that part can also be used.

The first regulating means 181 controls one of the first stake member 110 and the second stake member 120 whose movement to one side in the axial direction is restricted by the support portion 160. is locked so that movement in one axial direction toward the other side is restricted. Here, the first restricting means 181 is locked to the first pile member 110 so that movement of the first pile member 110 to the other side in the axial direction is restricted. As shown in FIG. 6, the first regulating means 181 controls the first pile member 110 with respect to the folded part 184 extending from the outer end of the support part 160 to the other side in the axial direction and the first protruding part 116. It has a first locking portion 187 that locks so that movement toward the other side in the axial direction is restricted. Specifically, the folded portion 184 is formed with a female threaded portion 183 extending in the inward and outward directions, and the first locking portion 187 has a male threaded portion 188. In this embodiment, the first locking portion 187 passes through the folded portion 184 with the male screw portion 188 of the first locking portion 187 screwed into the female screw portion 183. The portion of the first locking portion 187 that has passed through the folded portion 184 comes into contact with the other side end surface 118 of the first protrusion 116, so that the first locking portion 187 is locked to the first stake member 110.

The second restricting means 182 is locked to the other of the first pile member 110 and the second pile member 120 so as to restrict movement of the connecting piece 105 to the other side in the respective axial directions. . Here, the second restricting means 182 is locked to the second pile member 120 so that movement of the connecting piece 105 to the other side in the axial direction is restricted. As shown in FIGS. 6 and 8, the connecting piece 105 according to this embodiment has two second restricting means 182. Each of the second regulating means 182 is disposed in a gap between another first intersecting surface 117 and another second intersecting surface 127, and in a gap between second main body part 124 and second part 128B. a separate clearance adjustment part 185 extending from the locking part 170 to one side in the axial direction; and a second gap adjusting part 185 that locks against the second protrusion 128 so that movement of the connection piece 105 to the other side in the axial direction is restricted. It has two locking parts 186. Specifically, the second locking portion 186 extends outward from one end in the axial direction of the separate gap adjustment portion 185 and contacts the one end surface 129 of the second protrusion 128 to establish the connection. Movement of the member 101 toward the other side in the axial direction with respect to the second pile member 120 is restricted.

Next, the features and effects of the pile unit 200 according to the present embodiment described above will be listed.

In this embodiment, the first regulating means 181 regulates that one of the first pile member 110 and the second pile member 120 and the connecting member 101 are separated from each other in the axial direction, and the connecting member 101 and the first pile The second restricting means 182 restricts the member 110 and the other of the second pile members 120 from moving away from each other in the axial direction. Therefore, by applying a force in the direction of separating one of the first pile member 110 and the second pile member 120 from the other of the first pile member 110 and the second pile member 120, the first pile member 110 and the second pile member 120 The two pile members 120 can be moved together. Therefore, for example, when the first pile member 110 and the second pile member 120, which are connected to each other by the connecting member 101, are driven into the ground from the second pile member 120, by pulling up the first pile member 110, the first pile member 110 and the second stake member 120 can be pulled out of the ground.

Further, in the present embodiment, the first regulating means 181 locks on one of the first protruding part 116 protruding from the first main body part 114 and the second protruding part 128 protruding from the second main body part 124, and The restricting means 182 locks onto the other of the first protrusion 116 protruding from the first body part 114 and the second protrusion 128 protruding from the second body part 124 . Therefore, one of the first pile member 110 and the second pile member 120 and the connecting member 101 can be mutually connected to each other in the axial direction without performing processing to reduce the wall thickness of the first pile member 110 and the second pile member 120. It is possible to prevent the other of the first pile member 110 and the second pile member 120 and the connection member 101 from separating from each other in the axial direction.

(Other embodiments)
Finally, other embodiments of the present invention will be described.

In the first embodiment, an example was explained in which the second pile member 20 and the third pile member 30 are connected by rotating the third pile member 30 relative to the second pile member 20 by a predetermined angle. However, the method of connecting the second pile member 20 and the third pile member 30 is not limited to this. For example, the second pile member 20 and the third pile member 30 can be connected also by using the connection member according to the third embodiment as described below. With reference to FIGS. 11 and 12, differences from Embodiment 1 will be mainly described in detail.

The pile unit 100 according to the third embodiment includes a tubular first pile member 10A that extends along the axial direction in which the axis AX extends, and a first pile member 10A that extends along the axial direction and is fitted into the first pile member 10A from one side in the axial direction. The second pile member 20A extends along the axial direction and is fitted into the first pile member 10A from the side opposite to the second pile member 20A in the axial direction (in this embodiment, the other side in the axial direction). It has a third pile member 30A, and a connection unit 90A that connects the first pile member 10A, the second pile member 20A, and the third pile member 30A. The connection unit 90A includes a connection member 1A that connects the first pile member 10A and the second pile member 20A, and a connection member 80A that connects the second pile member 20A and the third pile member 30A (FIG. 11 and Figure 12).

The first pile member 10A has a first inner circumferential surface 11A including a first intersecting surface (not shown) having an angle that intersects with a circular locus centered on the axis AX.

The second pile member 20A includes a tubular second main body portion 24A extending in the axial direction, and an engaged portion 26A provided within the range of the cross-sectional shape of the second pile member 20A perpendicular to the axial direction. The second main body portion 24A has a shape that can be fitted to the first inner circumferential surface 11A of the first pile member 10A, and has a second outer circumferential surface 23A that is fitted inside the first inner circumferential surface 11A, and a second outer circumferential surface 23A that is fitted inside the first inner circumferential surface 11A. It has a second inner circumferential surface 21A that has a similar shape to the outer circumferential surface 23A and is surrounded by the second outer circumferential surface 23A. The engaged portion 26A includes a connection plate 22A (see FIG. 12) that connects opposing portions of the second inner peripheral surface 21A, a second attachment portion 27A extending from the connection plate 22A to the other side in the axial direction, and a second attachment portion 27A that extends from the connection plate 22A to the other side in the axial direction. It has a second engaging portion 28A extending from the other axial end of the second attachment portion 27A in a direction perpendicular to the axial direction. The second engaging portion 28A is located on the other axial side of the second other side end surface 25A on the other axial side of the second main body portion 24A.

The third pile member 30A includes a tubular third body portion 34A that has a third inner circumferential surface 31A and extends in the axial direction, and a third body portion 34A that connects opposing portions of the third inner circumferential surface 31A. The attached portion 36A (see FIG. 12) is fixed to the attached portion 36A (see FIG. 12).

The connecting member 80A includes an attaching portion 37A attached to the attached portion 36A, an extending portion 39A having a length that can reach the engaged portion 26A from the attaching portion 37A through the inside of the first pile member 10A, and an extending portion 39A. It has an engaging part 38A connected to the protruding part 39A. The attachment portion 37A is provided within the range of the cross-sectional shape of the third pile member 30A. The engaging portion 38A has a shape capable of engaging with the engaged portion 26A within the cross-sectional shape of the third pile member 30. Specifically, the engaging portion 38A extends in a direction perpendicular to the axial direction from the extending portion 39A on one axial side of the third one-side end surface 35A on one axial side of the third main body portion 34A. (See Figure 12).

The second pile member 20A and the third pile member 30A are arranged such that, for example, the second other side end surface 25A and the third one side end surface 35A are butted against each other, and the second pile member 20A is placed against the third pile member 30A. They are connected by relatively moving (sliding) them in a direction perpendicular to the axial direction and engaging the engaging portion 38A of the connecting member 80A with the engaged portion 26A (see FIG. 12). Note that when engaging the engaging portion 38A and the engaged portion 26A by the method described above, the first pile member 10A is moved in the axial direction so as not to impede the sliding of the second pile member 20A. Move it to the other side. Even when the connecting member is configured in the manner described above, the same effects as those of the connecting member according to the embodiment can be obtained.

Further, in the first embodiment, an example in which the second outer circumferential surface 23 has a shape similar to the first inner circumferential surface 11 has been described. However, the shape of the second outer circumferential surface 23 is not limited to this, and the second outer circumferential surface 23 is fitted onto the first inner circumferential surface 11 in a state where rotational force can be transmitted between the first pile member 10 and the second pile member 20. The shape of the second outer circumferential surface 23 can be changed as appropriate as long as it can be matched. The same applies to the shape of the third outer peripheral surface 33 according to the first embodiment and the shape of the second outer peripheral surface 123 according to the second embodiment.

In the first embodiment, the second pile member 20 is fitted into the first pile member 10 from one side in the axial direction, and the third pile member 30 is fitted into the first pile member 10 from the other side in the axial direction. Although an example in which they are fitted has been described, the second pile member 20 may be fitted to the first pile member 10 from the other side in the axial direction, and the third pile member 30 may be fitted to the first pile member 10 from one side in the axial direction. It may be fitted into the member 10. Regarding this point, the same applies to the second embodiment and the third embodiment.

Further, in the first embodiment, the support portion 60 moves the first pile member 10 to one side in the axial direction so that the fitting depth of the second pile member 20 to the first pile member 10 exceeds the specified fitting depth. Although an example in which movement is restricted has been described, the structure of the support portion is not limited to this. For example, when the second pile member 20 is fitted to the first pile member 10 from the other side in the axial direction, the fitting depth of the second pile member 20 to the first pile member 10 exceeds the specified fitting depth. The support portion can be configured to restrict movement of the second pile member 20 to one side in the axial direction. In this case, the connecting member 1 is moved inward from the one end in the axial direction of each gap adjustment part 50 (axis AX A support part extending in a direction approaching the axis AX) and a locking part extending in an outward direction (a direction away from the axis AX) from the other end in the axial direction of each gap adjustment part 50 and being locked to the first pile member 10. It suffices if it has a part. In other words, when the second pile member 20 is fitted to the first pile member 10 from the other side in the axial direction, the member denoted by the reference numeral 70 in FIG. The member labeled 60 functions as a locking portion 70. Regarding this point, the same applies to the second embodiment and the third embodiment.

In addition, when the support part is provided inside the gap adjustment part in this way, in Embodiment 2, the first regulating means 181 and the second regulating means 182 are reversed. Specifically, the member labeled 182 in FIG. 6 functions as the first regulating means 181, and the member labeled 181 in FIG. 6 functions as the second regulating means 182.

Further, the second pile member 120 according to the second embodiment may be connected to a pile member different from the first pile member 110 in the axial direction. For example, as shown in FIG. 13, a fourth stake member 195 may be connected to the second stake member 120 from one side in the axial direction. The fourth pile member 195 includes a tubular fourth main body part 194 extending in the axial direction, a fourth protruding part 199 projecting outward from the fourth main body part 194, and a blade 196 attached to the fourth main body part 194. It has a blade 196 for excavating the ground. The fourth main body portion 194 has a shape similar to the second outer circumferential surface 123 and a fourth inner circumferential surface 191 into which the second outer circumferential surface 123 fits, and a shape similar to the fourth inner circumferential surface 191. and a fourth outer circumferential surface 198 surrounding the fourth inner circumferential surface 191. Further, the fourth stake member 195 is connected to the second stake member 120 via the connection member 101 described above. Specifically, the connecting member 101 is interposed between the second pile member 120 and the fourth pile member 195 in an attitude opposite to that shown in FIG. The second pile member 120 and the fourth pile member 195 are connected in a state where movement to one side in the direction is restricted. In addition, FIG. 13 shows a cross-sectional view of a part of the first pile member 110, the second pile member 120, the connection member 101, and the fourth pile member 195, and shows a side view of the remaining part of the fourth pile member 195. ing.

Furthermore, in the second embodiment, an example was described in which the second locking portion 186 of the second restriction means 182 extends outward in order to lock onto the one side end surface 129 of the second protrusion 128. The method of locking the means 182 to the second protrusion 128 is not limited to this. For example, the second restricting means 182 may be locked to the second protrusion 128 by using a predetermined fastening member (not shown) having a male threaded portion. Specifically, the second locking portion 186 of the second restricting means 182 further includes a separate folded portion 189 (see FIG. 14) extending from the outer end of the second locking portion 186 to the other side in the axial direction. You can. A hole HL2 is formed in the separate folded portion 189 so that a predetermined fastening member can pass therethrough. By locking a predetermined fastening member passed through the hole HL2 with the other side end surface (not shown) facing the other side in the axial direction of the second portion 128B of the second protrusion 128, the second regulating means 182 The connecting member 101 can be locked to the second stake member 120.

Moreover, in the said Embodiment 1 and 3, the example where the gap adjustment member 40 as shown in FIG. 2 was provided in the gap between the 1st pile member 10, 10A and the 3rd pile member 30, 30A was demonstrated. However, in the pile units 100 according to Embodiments 1 and 3, a gap adjustment member 140 as shown in FIG. 15 may be used. This will be explained below with reference to FIG.

The pile unit 100 has a tubular first pile member 10B that extends along the axial direction in which the axis AX extends, instead of the first pile member 10 described above. The first pile member 10B has a tubular first body portion 14B extending in the axial direction, and a first protrusion portion 16B provided around the first body portion 14B and extending outward.

The gap adjustment member 140 includes an insertion portion 142 that is inserted into the gap between the third pile member (not shown) and the first pile member 10B and extends in the axial direction, and a gap adjustment member that is connected to the insertion portion 142 and extends in the axial direction. 140 to the first pile member 10B. Specifically, the locking portion 141 is a first locking portion that extends outward from the other end of the insertion portion 142 in the axial direction so as to restrict movement of the gap adjustment member 140 to one side in the axial direction. portion 143 and a second locking portion 144 extending from the outer end of the first locking portion 143 to one side in the axial direction so as to restrict movement of the gap adjustment member 140 inside the first pile member 10B. and a third locking portion 145 extending inward from the other end of the second locking portion 144 in the axial direction so as to restrict movement of the gap adjustment member 140 to the other side in the axial direction. have Even when the gap adjustment member 140 is configured in the manner described above, the same effects as those of the gap adjustment member 40 according to the first and third embodiments can be obtained.

AX Axis 1, 1A, 101 Connection member 10, 10A, 10B, 110 First pile member 11, 11A, 111 First inner peripheral surface 12, 112 First intersecting surface 14B, 114 First main body 16B, 116 First protrusion Parts 20, 20A, 120 Second pile member 21, 21A Second inner peripheral surface 22, 122 Second intersecting surface 23, 23A, 123 Second outer peripheral surface 24, 24A, 124 Second main body part 26, 26A Engaged part 30, 30A Third pile member 32 Third intersecting surface 33 Third outer peripheral surface 36, 36A Attached part 40, 140 Gap adjustment member 50, 150 Gap adjustment part 60, 160 Support part 70, 170 Locking part 80, 80A Connection Member 37A, 81 Attachment part 39A, 82 Extension part 38A, 83 Engagement part 90, 90A Connection unit 100, 200 Pile unit 181 First restriction means 182 Second restriction means 187 First locking part 186 Second locking part

Claims (9)

a tubular first pile member having a first inner circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis; and a first pile member fitted into the first inner circumferential surface. a second pile member having a second outer circumferential surface having a shape that allows the second pile member to be fitted inside the first pile member; A connecting member that connects the first pile member and the second pile member to each other in a state in which the information can be transmitted,
so as to fill a gap between the first intersecting surface and a second intersecting surface opposite to the first intersecting surface on the second outer peripheral surface of the second pile member fitted to the first pile member. a gap adjusting section provided between the first intersecting surface and the second intersecting surface;
Along the axis of one of the first pile member and the second pile member such that the fitting depth of the second pile member with respect to the first pile member is deeper than a prescribed fitting depth set in advance. In order to restrict movement to one side in the axial direction, the blade extends from the gap adjusting portion to one side in the inward/outward direction and comes into contact with one end surface of one of the first pile member and the second pile member in the axial direction. a support part that supports one of the first pile member and the second pile member by
Engagement with the other of the first pile member and the second pile member with the support portion positioned such that the fitting depth of the second pile member with respect to the first pile member is the specified fitting depth. and a locking portion extending from the gap adjusting portion to the other side in the inward-outward direction so as to be stopped. a tubular first pile member having a first inner circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis; and a first pile member fitted into the first inner circumferential surface. A second pile member having a second outer circumferential surface having a shape that can be fitted together and fitted inside the first pile member, and a second pile member having a shape that can fit the first inner circumferential surface. and a third pile member having a third outer circumferential surface having a third outer peripheral surface and being fitted inside the first pile member from the opposite side to the second pile member in the axial direction along the axis. A unit,
The first pile member and the second pile member are connected to each other in a state that is interposed between the first pile member and the second pile member and can transmit rotational force about the predetermined axis. , the connecting member according to claim 1;
a connecting member that connects the second pile member and the third pile member so as to prevent the second pile member and the third pile member from separating from each other in the axial direction. , connection unit. The connection unit according to claim 2,
One of the second pile member and the third pile member has an attached portion provided within a range of a cross-sectional shape of one of the second pile member and the third pile member perpendicular to the axial direction. ,
The other of the second pile member and the third pile member has an engaged portion provided within a range of a cross-sectional shape of the other of the second pile member and the third pile member perpendicular to the axial direction. death,
The connecting member includes an attachment part having a shape that can be attached to the attached part within the range of the cross-sectional shape of one of the second pile member and the third pile member, and a connection member from the attachment part to the first pile member. an extension part having a length that can reach the engaged part through the inner side; and an extension part connected to the extension part and within the range of the cross-sectional shape of the other of the second pile member and the third pile member. A connection unit comprising: an engaging portion having a shape capable of engaging with the engaged portion. A pile unit,
a tubular first pile member having a first inner circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis;
a second pile member having a second outer circumferential surface having a shape that can be fitted to the first inner circumferential surface and fitted inside the first pile member;
It has a third outer circumferential surface having a shape that can fit into the first inner circumferential surface, and extends inside the first pile member from the opposite side to the second pile member in the axial direction along the axis. a third pile member to be fitted;
It has a connection unit according to claim 2 or 3, which connects the first pile member, the second pile member, and the third pile member,
The third pile member is a pile unit having the same cross-sectional shape as the second pile member. The pile unit according to claim 4,
Filling a gap between the first intersecting surface and a third intersecting surface opposite to the first intersecting surface on the third outer circumferential surface of the third pile member fitted to the first pile member. The pile unit further includes a gap adjustment member provided between the first intersecting surface and the third intersecting surface. The pile unit according to claim 4 or 5,
The cross-sectional shape of the first inner circumferential surface is constant over the entire length in the axial direction,
The total length of the first pile member in the axial direction is shorter than the total length of the second pile member and the third pile member in the axial direction. The connecting member according to claim 1,
With respect to one of the first pile member and the second pile member whose movement in the axial direction is regulated by the support portion, one of the first pile member and the second pile member is regulated in the axial direction. a first restricting means that is locked so that movement to the other side is restricted;
The method further includes a second restricting means that is locked to the other of the first pile member and the second pile member so that movement of the connecting member toward the other side in the axial direction is restricted. A connecting member. The connecting member according to claim 7,
The first pile member has a tubular first body portion having the first inner circumferential surface, and a first protrusion portion that protrudes outward from the first body portion,
The second pile member has a second body portion having the second outer circumferential surface, and a second protrusion portion that protrudes outward from the second body portion,
The first restricting means restricts movement of one of the first pile member and the second pile member toward the other side in the axial direction with respect to one of the first protrusion and the second protrusion. It has a first locking part that locks as shown in FIG.
The second restricting means includes a second locking portion that locks the other of the first protrusion and the second protrusion so that movement of the connecting member toward the other side in the axial direction is restricted. A connecting member having: A pile unit,
a tubular first pile member having a first inner circumferential surface including a first intersecting surface having an angle to intersect with a circular locus centered on a predetermined axis;
a second pile member having a second outer circumferential surface having a shape that can be fitted to the first inner circumferential surface and fitted inside the first pile member;
The first pile member and the second pile member are connected to each other in a state that is interposed between the first pile member and the second pile member and can transmit rotational force about the predetermined axis. , and the connecting member according to claim 1 .