JP5097192B2 - Pile removal device connecting member - Google Patents

Description

  The present invention relates to a connecting member for connecting an upper end portion of a casing to an output shaft of a driving device in a pile removing device for removing a pile embedded in the ground.

As a pile removing device for removing a pile embedded in the ground, a drive device that moves up and down along a leader supported by a base machine, and a cylindrical casing, an output shaft of the drive device In some cases, the upper end of the casing is connected to the casing, and a drilling blade is provided at the lower end opening edge of the casing.
In such a pile removing device, the casing is rotated around the axis, and the periphery of the pile is excavated by the casing so that the pile is inserted into the casing, thereby greatly increasing the resistance force when the pile is pulled out from the ground. It can be reduced (see, for example, Patent Document 1).

In the above-described pile removing device, when the output shaft and the upper end of the casing are directly connected, when the casing advances obliquely along the pile inclined in the ground, the connection portion between the output shaft and the casing An excessive bending moment will occur.
Therefore, as a conventional pile removing device, there is an apparatus in which an output shaft and a casing are connected via a cross pin having a shaft portion protruding in the front, rear, left and right directions. In this configuration, the casing can be rotated while being tilted in the front-rear and left-right directions with respect to the output shaft.

JP 2008-266928 A

When excavating the periphery of a pile with the above-described pile removing device, the excavation efficiency is enhanced by jetting water and compressed air from the lower end of the casing and softening the ground. In some cases, the casing is inserted again into the vertical hole formed after the pile is removed, cement is ejected from the lower end of the casing, and the vertical hole is backfilled by mixing earth and sand and cement in the vertical hole.
Accordingly, the output shaft of the driving device is formed with a flow path for supplying fluid such as water or compressed air to the casing, and the casing is supplied with the fluid supplied from the output shaft to the lower end of the casing. A flow path is formed.

  In the configuration in which the output shaft and the upper end portion of the casing are connected by a cross pin, both ends of the connecting hose piped outside the cross pin are holes formed on the side surface of the output shaft and the upper end portion of the casing. By connecting to, the flow path of the output shaft and the flow path of the casing are connected.

In this configuration, since the connection hose is disposed outside the connection portion between the output shaft and the upper end portion of the casing, the connection hose may come into contact with other members and be damaged.
In addition, in order to allow a large amount of fluid to flow smoothly through the connecting hose, the inner diameter of the connecting hose, the side surface of the output shaft, and the hole formed on the side surface of the upper end of the casing are enlarged so that the flow path of the fluid can be increased. Although it is necessary to increase an inner diameter, there exists a problem that the intensity | strength of an output shaft or a casing falls because a hole becomes large.

  Therefore, in the present invention, the above-described problems can be solved, and the casing can be rotated in a state where the casing is tilted in the front-rear and left-right directions with respect to the output shaft of the drive device. It is an object of the present invention to provide a connecting member that can smoothly supply the gas.

In order to solve the above-mentioned problems, the present invention comprises a drive device supported by a base machine and a cylindrical casing, and excavates around a pile embedded in the ground by rotating the casing around an axis. to the pile disconnect device, the output shaft of the driving device, a coupling member for tilting to freely connect the upper portion of the casing in the longitudinal and lateral directions, is connected to an output shaft of the driving device, the lower surface Two bearing members are erected, and are connected to an upper plate in which a flow path for supplying fluid from the driving device is formed, and an upper end portion of the casing, and two bearing members are erected on the upper surface. Rutotomoni, wherein the lower plate flow channel for supplying a fluid is formed in the casing, an annular portion formed with a through-hole which penetrates in the vertical direction, four shaft portions on the outer peripheral surface of the annular portion Comprising an intermediate member projecting longitudinal and lateral directions, and wherein the shaft portions of the front and rear of the intermediate member, an axial direction with respect to the upper plate or one bearing hole formed in said respective bearing member of the lower plate The left and right shaft portions of the intermediate member are rotatable about the axis with respect to the bearing holes formed in the other bearing member of the upper plate or the lower plate. A connecting hose having one end connected to the flow path of the upper plate and the other end connected to the flow path of the lower plate is inserted into the through hole of the intermediate member. It is characterized by.

In this configuration, the upper plate to which the output shaft is connected and the lower plate to which the upper end portion of the casing is connected are connected via an intermediate member having four shaft portions protruding in the front-rear and left-right directions, so that output is achieved. The casing can be rotated with the casing tilted in the front-rear and left-right directions with respect to the shaft. As a result, when the casing advances along the slanted pile in the ground, the connecting portion between the output shaft and the casing is bent, so that an excessive bending moment can be prevented from acting on the connecting portion. .
The flow path of the upper plate and the flow path of the lower plate are connected in the vertical direction by a connection hose inserted through the through hole of the intermediate member, and the connection hose is connected to the side surface of the output shaft and the side surface of the upper end portion of the casing. Therefore, even if the inner diameter of the fluid flow path is increased, the strength of the connecting member does not decrease. Therefore, it is possible to smoothly supply a large amount of fluid from the output shaft to the casing by increasing the inner diameter of the fluid flow path.
Moreover, since the connection hose is inserted through the through hole of the intermediate member and the connection hose is not disposed outside the connection member, it is possible to prevent other members from coming into contact with the connection hose.

In the connecting member of the pile removing device described above, the upper plate and the lower plate are a base member to which the output shaft of the driving device or the upper end portion of the casing is connected, and two supports attached to the base member. And each of the support members can be configured such that the bearing member is erected .

In this configuration, the intermediate member can be easily attached to the upper plate and the lower plate by attaching the support member to the base member after the shaft portion of the intermediate member is inserted through the bearing hole of the support member.
Moreover, since each axial part of an intermediate member can be attached to an upper plate and a lower plate without dividing | segmenting the outer peripheral part of a bearing hole, the intensity | strength of a bearing site | part can be raised.

According to the connecting member of the pile removing device of the present invention, when the casing advances along the pile inclined in the ground, the connecting portion between the output shaft and the casing is bent, so that an excessive bending moment is generated in the connecting portion. It can be prevented from acting.
In addition, it is possible to smoothly supply a large amount of fluid from the output shaft to the casing by increasing the inner diameter of the fluid flow path.
Moreover, since a connection hose is not arrange | positioned outside a connection member, it can prevent that another member contacts a connection hose.

It is the side view which showed the pile extraction apparatus using the connection member of this embodiment. It is the front view which showed the connection member of this embodiment. It is the side view which showed the connection member of this embodiment. It is the figure which showed the connection member of this embodiment, (a) is a top view, (b) is a bottom view. It is the figure which showed the intermediate member of this embodiment, (a) is a front view, (b) is a top view. It is the figure which showed the connection member of this embodiment, (a) is an exploded side view of an upper plate and an intermediate member, (b) is an exploded front view of a lower plate and an intermediate member. In the connection member of this embodiment, it is a front view of the state where the casing inclined to the right side.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, the connecting member 10 of this embodiment is used in a pile removing device 1 for removing a pile K embedded in the ground. In the pile extraction device 1, the resistance force when the pile K is pulled out can be reduced by excavating the periphery of the pile K.
In the following description, the front, rear, left, right, up and down directions correspond to the directions shown in the drawings. Each direction in the present embodiment is set for convenience in order to make the configuration of the connecting member 10 easy to understand, and does not limit the configuration of the connecting member 10.

The pile removing device 1 includes a base machine 2, a reader 3 supported by the base machine 2, a drive device 4 attached to the reader 3, and a casing 5 connected to an output shaft 4a of the drive device 4. ing.
The base machine 2 is an existing mobile crane, and includes a boom 2a that can tilt and extend.
The reader 3 is a column having a rectangular cross section that is erected on the ground, and is configured by connecting a plurality of readers in the vertical direction. The upper end of the leader 3 is supported by the tip of the boom 2 a of the base machine 2.

The drive device 4 includes a hydraulic motor having an output shaft 4 a whose axial direction is arranged in the vertical direction, and is attached to vertical guide members provided at both side edges of the front surface of the reader 3. An elevating wire 4c suspended from the upper end portion of the boom 2a of the base machine 2 is wound around a pulley 4b provided at the upper end portion of the drive device 4. Then, the drive device 4 moves in the vertical direction along the reader 3 by winding or unwinding the lifting wire 4 c by the base machine 2.
Further, the drive device 4 is supplied with a fluid such as water or compressed air supplied from a fluid supply device (not shown) installed on the ground, and an outlet (not shown) formed at the lower end of the output shaft 4a. ) Is discharged.

The casing 5 is a cylindrical excavation member whose axial direction is arranged in the vertical direction, and an excavation blade (not shown) is provided at the lower end opening edge. The upper end portion 5a of the casing 5 is connected to the output shaft 4a of the drive device 4 via a connecting member 10 described later. Then, the periphery of the pile K can be excavated by rotating the output shaft 4a of the driving device 4 about the axis and rotating the casing 5 about the axis.
Further, the casing 5 is formed with a flow path for ejecting a fluid such as water or compressed air supplied to the upper end portion 5 a from an ejection port (not shown) provided at the lower end opening edge of the casing 5. Yes.

As shown in FIG. 2, the connecting member 10 connects the upper end portion 5 a of the casing 5 to the output shaft 4 a of the drive device 4 so as to be tiltable in the front-rear and left-right directions.
The connecting member 10 is rotatable with respect to the upper plate 20 connected to the output shaft 4 a of the driving device 4, the lower plate 30 connected to the upper end portion 5 a of the casing 5, and the upper plate 20 and the lower plate 30. And an intermediate member 40 to be attached.

  As shown in FIGS. 3 and 4A, the upper plate 20 includes a disk-shaped base member 21 and two semi-disk-shaped support members 22 and 22 attached to the lower surface of the base member 21. It is equipped with.

At the center of the upper surface of the base member 21 of the upper plate 20, a mounting portion 23 to which the output shaft 4 a of the driving device 4 is connected is projected. At the center of the attachment portion 23, an attachment hole 23a is formed in which the tip end portion of the output shaft 4a is inserted and fitted.
An outflow hole 24 penetrates in the vertical direction at the center of the bottom surface of the mounting hole 23a. The outflow hole 24 communicates with an outflow pipe 25 that projects from the center of the lower surface of the base member 21, and a vertical flow path is formed by the outflow hole 24 and the outflow pipe 25.

At both front and rear ends of the base member 21, key grooves 21 a and 21 a into which protrusions 28 b of the support member 22 described later are inserted are formed.
In the base member 21, a plurality of insertion holes 21 b through which the bolts 26 are inserted are arranged around the mounting portion 23 in a circumferential shape.

As shown in FIG. 3 and FIG. 4A, each support member 22, 22 of the upper plate 20 has an arcuate outer peripheral edge as the outer peripheral edge of the base member 21 when attached to the lower surface of the base member 21. It is formed to match the part.
The support member 22 has a plurality of insertion holes 22 b communicating with the insertion holes 21 b of the base member 21. The bolts 26 are inserted into the respective insertion holes 22b of the support member 22 and the respective insertion holes 21b of the base member 21, and the nut 27 is screwed onto the front end portion of the bolt 26 on the lower surface side of the support member 22, thereby supporting The member 22 is fixed to the lower surface of the base member 21.

  A semicircular groove 22 a is formed in the middle of the linear outer peripheral edge of the support member 22. In a state where the two support members 22 and 22 are attached to the lower surface of the base member 21, the outflow pipe 25 protruding from the lower surface of the base member 21 passes between the groove portions 22 a and 22 a of the support members 22 and 22. And it protrudes below each support member 22,22.

Bearing members 28 are erected on the front end portion of the lower surface of the front support member 22 and the rear end portion of the lower surface of the rear support member 22.
As shown in FIGS. 2 and 3, the bearing member 28 is a plate-like member whose both surfaces are directed in the front-rear direction, and has a base end (upper end) wider than a front end (lower end). The tip is formed in an arc shape. A bearing hole 28a into which a front or rear shaft portion 42a of the intermediate member 40 described later is inserted is formed at the tip of the bearing member 28.

  On the base end face (upper end face) of the bearing member 28, a cylindrical protrusion 28b protruding upward is formed. The protruding portion 28 b is inserted through a hole 22 c formed in the support member 22, and the tip portion protrudes from the upper surface of the support member 22. Further, the tip of the protruding portion 28 b is inserted into and fitted into the key groove 21 a of the base member 21. Therefore, the protrusion 28b serves as a key for preventing the support member 22 from shifting with respect to the base member 21 (see FIG. 4A).

2 and 4B, the lower plate 30 includes a disk-shaped base member 31 and two semi-disk-shaped support members 32 and 32 attached to the upper surface of the base member 21. It is equipped with.
The lower plate 30 and the above-described upper plate 20 (see FIG. 3) have substantially the same component configuration. The lower plate 30 is such that the support members 32, 32 are attached to the upper surface of the base member 31, the bearing members 38, 38 are arranged on the left and right, and the attachment portion 33 is a shaft portion. Different from the upper plate 20. In the following description, the description of the same configuration as the upper plate 20 with respect to the lower plate 30 will be omitted as appropriate.

At the center of the lower surface of the base member 31 of the lower plate 30, a mounting portion 33 to which the upper end portion 5a of the casing 5 is connected is projected. The attachment portion 33 is a shaft portion that is inserted into and fitted into the attachment hole 5 b formed in the upper end portion 5 a of the casing 5.
An inflow hole 34 penetrates through the center of the mounting portion 33 in the vertical direction. The inflow hole 34 communicates with an inflow pipe 35 protruding from the center of the upper surface of the base member 31, and a vertical flow path is formed by the inflow hole 34 and the inflow pipe 35.
At both left and right ends of the base member 31, key grooves 31a and 31a into which protruding portions 38b of the support member 32 described later are inserted are formed.

Each support member 32, 32 of the lower plate 30 is attached to the upper surface of the base member 31, as shown in FIG. 2 and FIG. A nut 37 is screwed on the upper surface side of the support member 32 to the distal end portion of the bolt 36 inserted into each insertion hole 31b of the base member 31 and each insertion hole 32b of the support member 32, so that the support member 32 becomes the base. The upper surface of the member 31 is fixed.
The inflow pipe 35 protruding from the upper surface of the base member 31 passes through the groove portions 32 a and 32 a of the support members 32 and 32 and protrudes above the support members 32 and 32.

Bearing members 38, 38 are erected on the left end portion of the upper surface of the left support member 32 and the right end portion of the upper surface of the right support member 32.
The protruding portion 38 b protruding upward from the base end surface (lower end surface) of the bearing member 38 is inserted into the hole portion 32 c of the support member 32, and the distal end portion protrudes from the upper surface of the support member 32. Further, the distal end portion of the protruding portion 38 b is inserted and fitted into the key groove 31 a of the base member 31.

As shown in FIGS. 5A and 5B, the intermediate member 40 includes an annular portion 41 in which a through-hole 41a is formed, and four protruding in the front-rear and left-right directions from the front, rear, left and right ends of the annular portion 41. Shaft portions 42a and 42b.
The annular portion 41 is a plate-like member in which a circular through hole 41a is formed at the center, and as shown in FIGS. 2 and 3, the front, rear, left and right bearings formed on the upper plate 20 and the lower plate 30 are provided. It is formed in a size that fits inside the members 28 and 38.
The front and rear shaft portions 42a and 42a and the left and right shaft portions 42b and 42b are cylindrical portions protruding from the outer peripheral surface of the annular portion 41, and the shaft portions 42a and 42b are formed to have the same diameter and length. .

As shown in FIG. 3, the front and rear shaft portions 42 a and 42 a are inserted from the inside into the bearing holes 28 a and 28 a of the respective bearing members 28 and 28 of the upper plate 20, and the front end surface of the shaft portion 42 a outside the bearing member 28. A disc-shaped stopper 43 is attached to the front. Thus, the front and rear shaft portions 42 a and 42 a are attached to the bearing members 28 and 28 of the upper plate 20 so as to be rotatable about the front and rear axis.
As shown in FIG. 2, the left and right shaft portions 42 b and 42 b are inserted from the inside into the bearing holes 38 a and 38 a of the bearing members 38 and 38 of the lower plate 30, and the front end surface of the shaft portion 42 b outside the bearing member 38. A disc-shaped stopper 43 is attached to the front. Accordingly, the left and right shaft portions 42b and 42b are attached to the respective bearing members 38 and 38 of the lower plate 30 so as to be rotatable about a left and right axis.

  Therefore, in the connecting member 10, as shown in FIGS. 2 and 3, the intermediate member 40 is tiltable in the front-rear direction with respect to the upper plate 20, and the lower plate 30 is tilted in the left-right direction with respect to the intermediate member 40. It is free. Therefore, the lower plate 30 to which the casing 5 is connected is tiltable in the front-rear and left-right directions with respect to the upper plate 20 connected to the output shaft 4a.

The through hole 41 a of the intermediate member 40 has a flexible structure in which the upper end is connected to the lower end opening of the outflow pipe 25 of the upper plate 20 and the lower end is connected to the upper end opening of the inflow pipe 35 of the lower plate 30. The connecting hose 50 is inserted. Thereby, the flow path of the upper plate 20 and the flow path of the lower plate 30 are connected in the vertical direction by the connection hose 50.
The fluid supplied from the drive device 4 to the flow path of the upper plate 20 is supplied to the casing 5 through the flow path of the connecting hose 50 and the lower plate 30 and is provided at the lower end opening edge of the casing 5 (see FIG. (Not shown).
Further, since the connecting hose 50 has flexibility, as shown in FIG. 7, when the lower plate 30 tilts with respect to the upper plate 20, the connecting hose 50 is curved inside the connecting member 10. To do.

Next, a procedure for attaching the intermediate member 40 to the upper plate 20 and the lower plate 30 will be described.
When the intermediate member 40 is attached to the upper plate 20, as shown in FIG. 6A, the front and rear shaft portions 42 a, 42 a of the intermediate member 40 with the support members 22, 22 removed from the base member 21. Are inserted into the bearing holes 28a, 28a of the support members 22, 22 from the inside, and stoppers 43, 43 are attached to the tip surfaces of the shaft portions 42a, 42a. Thereafter, as shown in FIG. 3, the support members 22 and 22 are attached to the lower surface of the base member 21 with a plurality of bolts 26 and nuts 27.

  When the intermediate member 40 is attached to the lower plate 30, as shown in FIG. 6B, the left and right shaft portions 42b, 42b of the intermediate member 40 with the support members 32, 32 removed from the base member 31. Are inserted into the bearing holes 38a, 38a of the support members 32, 32 from the inside, and stoppers 43, 43 are attached to the tip surfaces of the shaft portions 42b, 42b. Thereafter, as shown in FIG. 2, the support members 32 and 32 are attached to the upper surface of the base member 31 by a plurality of bolts 26 and nuts 27.

  In this way, the upper plate 20 and the lower plate 30 are attached to the intermediate member 40, and the outflow pipe 25 of the upper plate 20 and the inflow pipe 35 of the lower plate 30 are connected by the connection hose 50.

According to the connecting member 10 configured as described above, as shown in FIGS. 2 and 3, the upper plate 20 to which the output 4a of the driving device 4 is connected and the lower part to which the upper end portion 5a of the casing 5 is connected. By connecting the plate 30 via an intermediate member 40 having four shaft portions 42a and 42b protruding in the front-rear and left-right directions, the casing 5 is rotated in a state tilted in the front-rear and left-right directions with respect to the output shaft 4a. (See FIG. 7).
Thereby, when the casing 5 advances along the slanted pile in the ground, the connecting portion between the output shaft 4a and the casing 5 is bent, so that an excessive bending moment is prevented from acting on the connecting portion. be able to.

Further, the flow path of the upper plate 20 and the flow path of the lower plate 30 are connected in the vertical direction by a connection hose 50, and the connection hose 50 is connected to the side surface of the output shaft 4 a and the side surface of the upper end portion 5 a of the casing 5. Therefore, even if the inner diameters of the outflow hole 24, the inflow hole 34, and the connection hose 50, which are flow paths for fluid such as water and compressed air, are increased, the strength of the connection member 10 does not decrease. Therefore, it is possible to smoothly supply a large amount of fluid from the output shaft 4a to the casing 5 by increasing the inner diameter of the fluid flow path.
Moreover, since the connection hose 50 is inserted in the through hole 41a of the intermediate member 40 and the connection hose 50 is not disposed outside the connection member 10, it is possible to prevent other members from coming into contact with the connection hose 50.

As shown in FIGS. 6A and 6B, the upper plate 20 and the lower plate 30 are composed of base members 21 and 31 and two support members 22 and 32. After the shaft portions 42a and 42b of the intermediate member 40 are inserted into the bearing holes 28a and 38a of the 32, the support members 22 and 32 are attached to the base members 21 and 31, whereby the intermediate member 40 is attached to the upper plate 20 and the lower plate 30. Can be easily installed.
Moreover, since each shaft part 42a, 42b of the intermediate member 40 can be attached to the upper plate 20 and the lower plate 30 without dividing the outer peripheral part of the bearing holes 28a, 38a, the strength of the bearing part can be increased. .

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
In the connecting member 10 of this embodiment, as shown in FIGS. 2 and 3, front and rear bearing members 28, 28 are provided on the upper plate 20, and left and right bearing members 38, 38 are provided on the lower plate 30. However, the left and right bearing members may be provided on the upper plate 20, and the front and rear bearing members may be provided on the lower plate 30.
In addition, when a mounting hole is formed in the output shaft 4 a and a shaft portion is formed in the upper end portion 5 a of the casing 5, the output shaft 4 a is arranged by disposing the connecting member 10 of the present embodiment upside down. And the upper end 5a of the casing 5 can be coupled.
Further, the shapes of the mounting portion 23 of the upper plate 20 and the mounting portion 33 of the lower plate 30 are not limited, and can be formed corresponding to the shapes of the output shaft and the upper end portion of the casing.

  The base members 21 and 31 and the support members 22 and 32 are connected by a plurality of circumferentially arranged bolts 26 and 36 and nuts 27 and 37, but the base members 21 and 31 and the support members are connected. The fixing method with 22 and 32 is not limited.

DESCRIPTION OF SYMBOLS 1 Pile extraction apparatus 2 Base machine 2a Boom 3 Leader 4 Drive apparatus 4a Output shaft 5 Casing 5a Upper end part of casing 10 Connection member 20 Upper plate 21 Base member 21a Key groove 22 Support member 22a Groove part 23 Attachment part 24 Outflow hole 25 Outflow pipe 28 Bearing member 28a Bearing hole 28b Protruding portion 30 Lower plate 31 Base member 31a Key groove 32 Support member 32a Groove portion 33 Mounting shaft 34 Inflow hole 35 Inflow pipe 38 Bearing member 38a Bearing hole 38b Protruding portion 40 Intermediate member 41 Annular portion 41a Through hole 42a Front and rear shaft portions 42b Left and right shaft portions 43 Stopper 50 Connection hose

Claims (2)

In a pile removing device that includes a drive device supported by a base machine and a cylindrical casing, and rotates the casing around an axis to excavate the periphery of a pile embedded in the ground.
A connecting member for connecting the upper end of the casing in a tiltable manner in the front-rear and left-right directions with respect to the output shaft of the drive device,
An upper plate coupled to the output shaft of the drive device, and having two bearing members standing on the lower surface, and a flow path through which fluid is supplied from the drive device;
The lower plate is connected to the upper end of the casing, and two bearing members are erected on the upper surface, and a flow path for supplying fluid to the casing is formed;
It has an annular part in which a through-hole penetrating in the vertical direction is formed, and includes an intermediate member in which four shaft parts protrude in the front-rear and left-right directions on the outer peripheral surface of the annular part ,
Each of the shaft portions before and after the intermediate member is attached to a bearing hole formed in one of the bearing members on one of the upper plate or the lower plate so as to be rotatable about an axis.
Each of the left and right shaft portions of the intermediate member is attached to a bearing hole formed in the other bearing member of the other of the upper plate or the lower plate so as to be rotatable about an axis.
A pile having a connection hose with one end connected to the flow path of the upper plate and the other end connected to the flow path of the lower plate is inserted into the through hole of the intermediate member. Connecting member of the punching device The upper plate and the lower plate are
A base member to which the output shaft of the driving device or the upper end of the casing is coupled;
Two support members attached to the base member,
The connecting member of the pile removing device according to claim 1, wherein the bearing member is erected on each support member.

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