JP5383947B1 - Ground improvement device - Google Patents

Abstract

Provided is a ground improvement device capable of rotating a lateral protrusion around a horizontal axis with a simple device configuration and improving the durability of the device.
A ground improvement device includes a shaft body having an excavating shaft and an outer shaft, an upper projecting body, a lower projecting body, a vertical cylindrical body, a horizontal shaft, and a horizontal cylinder. And a rotation locus of the horizontal protrusion 180 around the axis B of the horizontal shaft 160 intersects with a rotation locus of the upper protrusion 130 around the axis A of the excavation shaft 121, The lower protrusion 140 is configured to intersect with the rotation trajectory of the excavation shaft 121 around the axis A, and the upper protrusion 130 is rotated by relatively rotating the excavation shaft 121 and the outer shaft 122 around the axis A of the excavation shaft 121. Then, the horizontal protrusion 180 is pushed by the lower protrusion 140 to rotate the horizontal protrusion 180 around the axis B of the horizontal axis 160.
[Selection] Figure 1

Description

  The present invention relates to a ground improvement device.

  Conventionally, the technique of the ground improvement apparatus is well-known (for example, patent document 1).

The ground improvement device described in Patent Document 1 includes an excavation shaft, a horizontal shaft, and a horizontal cylindrical body that is inserted through the horizontal shaft and is rotatable about the horizontal axis. And a guide member is provided, and the rotation of the horizontal axis around the axis of the excavation shaft is restricted by the guide member. And the frame was fixed to the excavation shaft, and the horizontal protrusion was fixed to the horizontal cylindrical body. Then, the excavation shaft is rotated about the axis, and the horizontal projecting body is rotated about the axis of the horizontal axis by applying the housing to the lateral projection body.
And the said ground improvement apparatus was stirring excavated soil and a solidification material using rotation of a horizontal protrusion.

However, since the guide member is juxtaposed in parallel with the excavation shaft and has a length substantially equal to the excavation shaft, there is a possibility that the apparatus configuration becomes large.
In addition, when rotating the horizontal protrusion with the housing against the horizontal protrusion, the load on the horizontal protrusion increases, and as a result, the horizontal protrusion may be easily deformed, worn, etc. There was a possibility that the property would be lowered.

Japanese Patent Laid-Open No. 2001-193052

  The present invention provides a ground improvement device capable of rotating a lateral protrusion around an axis of a horizontal axis with a simple device configuration and improving the durability of the device.

The ground improvement device according to claim 1,
A digging shaft and an outer shaft through which the digging shaft is inserted, the digging shaft having a projecting portion projecting in the axial direction of the digging shaft from within the outer shaft, and the digging shaft and the outer shaft are mutually connected A shaft body configured to be relatively rotatable about the axis of the excavation shaft;
An upper projecting body fixed to the outer shaft and juxtaposed in a predetermined number in the direction around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
A lower projecting body fixed to the projecting portion of the excavation shaft and juxtaposed at a predetermined number of intervals around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
A vertical tubular body through which the excavation shaft is inserted, disposed between the upper projecting body and the lower projecting body, and rotatable relative to the excavation shaft and the outer shaft around the axis of the excavation shaft;
A horizontal axis fixed to the vertical cylindrical body and having an axis substantially perpendicular to the axis of the excavation axis;
A horizontal cylindrical body that is inserted through the horizontal axis and is rotatable about the axis of the horizontal axis;
A laterally projecting body fixed to the horizontal cylindrical body, and juxtaposed in a predetermined number in the direction around the axis of the horizontal axis when viewed from the axial direction of the horizontal axis;
With
A rotation locus around the axis of the horizontal axis in the lateral protrusion intersects with a rotation locus around the axis of the excavation shaft in the upper protrusion, and also intersects with a rotation locus around the axis of the excavation axis in the lower protrusion. Configured as
By rotating the excavating shaft and the outer shaft relative to each other about the axis of the excavating shaft, the upper projecting body and the lower projecting body push the lateral projecting body so that the lateral projecting body is rotated about the axis of the horizontal axis. Rotate to

The ground improvement device according to claim 2,
A digging shaft and an outer shaft through which the digging shaft is inserted, the digging shaft having a projecting portion projecting in the axial direction of the digging shaft from within the outer shaft, and the digging shaft and the outer shaft are mutually connected A shaft body configured to be relatively rotatable about the axis of the excavation shaft;
An annular body through which the projecting portion of the excavation shaft is inserted and rotatable relative to the excavation shaft around the axis of the excavation shaft;
Fixed to the projecting portion of the excavation shaft, disposed between the outer shaft and the ring body, and a predetermined number of juxtaposed at substantially equal intervals around the axis of the excavation shaft when viewed from the axial direction of the excavation shaft An upper protrusion,
A lower protrusion that is fixed to the ring body and is juxtaposed in a predetermined number in the direction around the axis of the excavation shaft as viewed from the axial direction of the excavation axis;
One end fixed to the outer shaft and the other end fixed to the ring,
A vertical cylinder through which the excavation shaft is inserted and which is disposed between the upper projecting body and the lower projecting body and is relatively rotatable around the axis of the excavation shaft with respect to the excavation shaft, the outer shaft, and the ring body And
A horizontal axis fixed to the vertical cylindrical body and having an axis substantially perpendicular to the axis of the excavation axis;
A horizontal cylindrical body that is inserted through the horizontal axis and is rotatable about the axis of the horizontal axis;
A laterally projecting body fixed to the horizontal cylindrical body, and juxtaposed in a predetermined number in the direction around the axis of the horizontal axis when viewed from the axial direction of the horizontal axis;
With
A rotation locus around the axis of the horizontal axis in the lateral protrusion intersects with a rotation locus around the axis of the excavation shaft in the upper protrusion, and also intersects with a rotation locus around the axis of the excavation axis in the lower protrusion. Configured as
By rotating the excavating shaft and the outer shaft relative to each other about the axis of the excavating shaft, the upper projecting body and the lower projecting body push the lateral projecting body so that the lateral projecting body is rotated about the axis of the horizontal axis. Rotate to

The ground improvement device according to claim 3,
The lateral protrusion has a function as a stirring blade, and / or the stirring blade is fixed to the horizontal cylindrical body.

The ground improvement device according to claim 4,
When rotating the excavation shaft and the outer shaft relative to each other around the axis of the excavation shaft, the absolute value of the rotation speed of the excavation shaft around the axis of the excavation shaft and the axis of the excavation shaft at the outer shaft By making a difference between the absolute value of the rotational speeds of the horizontal rotation body, the lateral projecting body is rotated around the axis of the excavation shaft.

The ground improvement device according to claim 5,
The horizontal axis has a function as a stirring blade, and / or the stirring blade is fixed to the vertical cylindrical body,
When rotating the excavation shaft and the outer shaft relative to each other around the axis of the excavation shaft, the absolute value of the rotation speed of the excavation shaft around the axis of the excavation shaft and the axis of the excavation shaft at the outer shaft By providing a difference between the absolute value of the rotation speed of the vertical axis, the vertical cylindrical body is rotated around the axis of the excavation axis at a speed different from that of the excavation axis and the outer axis.

The ground improvement device according to claim 6,
A digging shaft and an outer shaft through which the digging shaft is inserted, the digging shaft having a projecting portion projecting in the axial direction of the digging shaft from within the outer shaft, and the digging shaft and the outer shaft are mutually connected A shaft body configured to be relatively rotatable about the axis of the excavation shaft;
An annular body through which the projecting portion of the excavation shaft is inserted and rotatable relative to the excavation shaft around the axis of the excavation shaft;
A first upper projecting body fixed to the outer shaft and juxtaposed in a predetermined number in the direction around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
Fixed to the projecting portion of the excavation shaft, disposed between the outer shaft and the ring body, and a predetermined number of juxtaposed at substantially equal intervals around the axis of the excavation shaft when viewed from the axial direction of the excavation shaft A first lower projecting body,
Fixed to the projecting portion of the excavation shaft, disposed between the outer shaft and the ring body, and a predetermined number of juxtaposed at substantially equal intervals around the axis of the excavation shaft when viewed from the axial direction of the excavation shaft A second upper protrusion,
A second lower projecting body fixed to the ring body and juxtaposed at a predetermined number of intervals around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
One end fixed to the outer shaft and the other end fixed to the ring,
The excavation shaft is inserted and disposed between the first upper protrusion and the first lower protrusion, and rotates relative to the excavation shaft, the outer shaft, and the ring body around the excavation axis. Possible first vertical cylindrical body,
A first horizontal axis fixed to the first vertical cylindrical body and having an axis substantially perpendicular to the axis of the excavation axis;
A first horizontal cylindrical body through which the first horizontal axis is inserted and rotatable about the axis of the first horizontal axis;
A first lateral protrusion fixed to the first horizontal cylindrical body and juxtaposed with a predetermined number of portions at substantially equal intervals around the axis of the first horizontal axis when viewed from the axial direction of the first horizontal axis; ,
The excavation shaft is inserted, and is disposed between the second upper protrusion and the second lower protrusion, and rotates relative to the excavation shaft, the outer shaft, and the ring body around the excavation axis. A possible second vertical cylinder;
A second horizontal axis fixed to the second vertical cylindrical body, disposed at a predetermined interval with respect to the first horizontal axis, and having an axis substantially perpendicular to the axis of the excavation axis;
A second horizontal cylindrical body that is inserted through the second horizontal axis and is rotatable about the axis of the second horizontal axis;
A second lateral protrusion fixed to the second horizontal cylindrical body and juxtaposed at a predetermined number of intervals around the axis of the first horizontal axis when viewed from the axial direction of the first horizontal axis; ,
With
The rotation trajectory around the axis of the first horizontal axis in the first lateral protrusion intersects with the rotation trajectory around the axis of the excavation axis in the first upper protrusion, and the excavation axis in the first lower protrusion. Configured to intersect with the rotation trajectory around the axis of
The rotation trajectory of the second horizontal protrusion around the second horizontal axis intersects the rotation trajectory of the second upper protrusion around the excavation axis and the excavation axis of the second lower protrusion. Configured to intersect with the rotation trajectory around the axis of
The rotation trajectory around the axis of the first horizontal axis in the first lateral protrusion is configured not to intersect the rotation trajectory around the axis of the second horizontal axis in the second lateral protrusion.
The first lateral protrusion is pushed by the first upper protrusion and the first lower protrusion by rotating the excavation shaft and the outer shaft relative to each other around the axis of the excavation shaft. The body is rotated about the axis of the first horizontal axis, and the second horizontal protrusion is pushed by the second upper protrusion and the second lower protrusion, and the second horizontal protrusion is moved to the second horizontal axis. Rotate around the axis.

  The present invention has an effect that it is possible to rotate the lateral protrusion around the axis of the horizontal axis with a simple device configuration and to improve the durability of the device.

The figure which shows 1st embodiment of the ground improvement apparatus which concerns on this invention. (A) X1-X1 sectional drawing of FIG. 1, (b) Y1-Y1 sectional drawing of FIG. FIG. 2 is a partially enlarged perspective view of FIG. 1. The perspective view which shows the attachment structure of a horizontal protrusion. The figure which shows the modification of the support structure of a vertical cylindrical body. (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X1-X1 sectional drawing of Fig.5 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X1-X1 sectional drawing of Fig.6 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X1-X1 sectional drawing of Fig.7 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X1-X1 sectional drawing of Fig.8 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X1-X1 sectional drawing of Fig.9 (a). (A) The partial expansion perspective view of a ground improvement apparatus, (b) Sectional drawing which looked at the ground improvement apparatus from upper direction. The perspective view which shows a middle stirring blade. The figure which shows operation | movement of a ground improvement apparatus. The figure which shows 2nd embodiment of the ground improvement apparatus which concerns on this invention. (A) X2-X2 sectional drawing of FIG. 13, (b) Y2-Y2 sectional drawing of FIG. The figure which shows the modification of the support structure of a vertical cylindrical body. (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X2-X2 sectional drawing of Fig.15 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X2-X2 sectional drawing of Fig.16 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X2-X2 sectional drawing of Fig.17 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X2-X2 sectional drawing of Fig.18 (a). (A) The figure which shows operation | movement of a ground improvement apparatus, (a) X2-X2 sectional drawing of Fig.19 (a). (A) The partial expansion perspective view of a ground improvement apparatus, (b) Sectional drawing which looked at the ground improvement apparatus from upper direction. The perspective view which shows a middle stirring blade. The figure which shows operation | movement of a ground improvement apparatus. The figure which shows 3rd embodiment of the ground improvement apparatus which concerns on this invention. The figure which shows operation | movement of a ground improvement apparatus.

[First embodiment]
Below, the ground improvement apparatus 100 is demonstrated.

The ground improvement device 100 improves the ground by discharging the solidified material while excavating the ground, and stirring and hardening the solidified material and the excavated soil.
The ground improvement device 100 is supported by a base machine or the like so as to be movable up and down.

  As shown in FIGS. 1 to 3, the ground improvement device 100 includes a rotary drive device 110, a shaft body 120, upper projecting bodies 130, 130, and lower projecting bodies 140, 140. The cylindrical body 150, the horizontal shaft 160, the horizontal cylindrical body 170, and the lateral protrusions 180, 180.

  The rotational drive device 110 is a device for rotationally driving the shaft body 120. The rotation drive device 110 is constituted by, for example, a biaxial coaxial earth auger. The rotation drive device 110 includes a motor 111 and a double gear mechanism 112.

  The shaft body 120 includes an excavation shaft 121 and an outer shaft 122 through which the excavation shaft 121 is inserted, and has a double shaft structure including the excavation shaft 121 and the outer shaft 122.

  The excavation shaft 121 has a rod shape extending in the vertical direction, and has an axis A extending in the vertical direction. The outer shaft 122 has a cylindrical shape that is open at the top and bottom, and the excavation shaft 121 is inserted through the inside thereof.

  The upper ends of the excavation shaft 121 and the outer shaft 122 are connected to the motor 111 via a known double gear mechanism 112. The excavation shaft 121 and the outer shaft 122 are configured to rotate relative to each other around the axis A of the excavation shaft 121 by transmitting the rotational driving force from the motor 111 via the double gear mechanism 112. The excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121. (1) The direction in which the excavation shaft 121 and the outer shaft 122 are different from each other in the rotation around the axis A of the excavation shaft 121. (2) the excavation shaft 121 and the outer shaft 122 rotate in the same direction, but their rotational speeds are different from each other, and (3) the outer shaft 122 stops rotating. It means that the excavation shaft 121 rotates in the state of being.

  The lower side of the excavation shaft 121 protrudes downward (in the direction of the axis A of the excavation shaft 121) from the opening at the lower end of the outer shaft 122. Below, the part which protrudes from the opening of the lower end of the outer side axis | shaft 122 in the excavation axis | shaft 121 is called the protrusion part 121a.

  An upper stirring blade 101 is fixed to the outer peripheral side surface of the outer shaft 122. The upper stirring blade 101 is a substantially plate-like member, protrudes outward from the outer peripheral side surface of the outer shaft 122, and rotates integrally with the outer shaft 122. Note that the upper stirring blade 101 may be fixed to an upper protrusion 130 described later.

  A lower stirring blade 102 is fixed to the outer peripheral side surface of the protruding portion 121 a of the excavation shaft 121. The lower stirring blade 102 is a substantially plate-like member, protrudes outward from the outer peripheral side surface of the protrusion 121 a of the excavation shaft 121, and rotates integrally with the excavation shaft 121. The lower stirring blade 102 is disposed in the middle of the upper and lower portions of the protruding portion 121a. Note that the lower stirring blade 102 may be fixed to a lower protrusion 140 described later.

  The excavation blade 103 is fixed to the lower end portion of the protrusion 121 a of the excavation shaft 121. Further, a solidified material discharge hole (not shown) is formed at the lower end portion of the protruding portion 121 a of the excavation shaft 121.

  The upper protrusion 130 is fixed to the outer peripheral side surface of the outer shaft 122 and rotates integrally with the outer shaft 122. The upper protrusion 130 has a bar shape that protrudes in the radial direction of the outer shaft 122 from the outer peripheral side surface of the outer shaft 122. Four upper projecting bodies 130 are juxtaposed at substantially equal intervals (including equal intervals) around the axis A of the excavation shaft 121 when viewed from the direction of the axis A of the excavation shaft 121 (the direction in which the axis A extends). Yes. In the present embodiment, the upper protrusions 130, 130, 130, and 130 are juxtaposed at intervals of 90 ° in the direction around the axis A of the excavation shaft 121 when viewed from the direction of the axis A of the excavation shaft 121.

  The lower protrusion 140 is fixed to the outer peripheral side surface of the protrusion 121 a of the excavation shaft 121 and rotates integrally with the excavation shaft 121. The lower protrusion 140 has a rod shape that protrudes in the radial direction of the excavation shaft 121 from the outer peripheral side surface of the protrusion 121 a of the excavation shaft 121. Four lower protrusions 140 are juxtaposed at substantially equal intervals (including equal intervals) in the direction around the axis A of the excavation shaft 121 when viewed from the axis A direction of the excavation shaft 121. In the present embodiment, the lower projecting bodies 140, 140, 140, and 140 are juxtaposed at intervals of 90 ° in the direction around the axis A of the excavation shaft 121 when viewed from the direction of the axis A of the excavation shaft 121.

As shown in FIGS. 3 and 4, the vertical cylindrical body 150 has a cylindrical shape with both upper and lower ends opened. The protruding portion 121 a of the excavation shaft 121 is inserted into the vertical cylindrical body 150. The vertical cylindrical body 150 is supported so as to be rotatable relative to the excavation shaft 121 and the outer shaft 122 around the axis A of the excavation shaft 121. The vertical tubular body 150 is disposed between the upper projecting body 130 and the lower projecting body 140. A flange portion 121b is formed on the protruding portion 121a of the excavation shaft 121 so as to sandwich the vertical cylindrical body 150 from above and below. The flange portion 121b is integrated with the protruding portion 121a of the excavating shaft 121, and restricts vertical movement (movement in the axis A direction) of the vertical cylindrical body 150.
As shown in FIG. 5, the vertical cylindrical body 150 is configured such that the protruding portion 121 a and the outer shaft 122 of the excavation shaft 121 are inserted, and a flange portion 122 b is formed on the outer shaft 122. You may comprise so that the vertical movement of the vertical cylindrical body 150 may be controlled by the said flange part 122b.

  The horizontal axis 160 is fixed to the outer peripheral side surface of the vertical cylindrical body 150 and rotates integrally with the vertical cylindrical body 150. The horizontal axis 160 has a rod shape protruding in the radial direction of the vertical cylindrical body 150, and has an axis B substantially perpendicular (including vertical) to the axis A of the excavation axis 121. The horizontal axis 160 is disposed between the upper protrusion 130 and the lower protrusion 140.

  The horizontal cylindrical body 170 has a cylindrical shape that is open at both ends in the horizontal direction. A horizontal shaft 160 is inserted through the horizontal cylindrical body 170. The horizontal cylindrical body 170 is supported so as to be rotatable relative to the horizontal axis 160 about the axis B of the horizontal axis 160. A pin 161 for preventing the horizontal tubular body 170 from falling off the horizontal shaft 160 is attached to the horizontal shaft 160.

  A horizontal stirring blade 104 is fixed to the outer peripheral side surface of the horizontal cylindrical body 170. The horizontal stirring blade 104 is a substantially plate-like member, protrudes outward from the outer peripheral side surface of the horizontal cylindrical body 170, and rotates integrally with the horizontal cylindrical body 170. In addition, you may fix the horizontal stirring blade 104 to the horizontal protrusion 180 mentioned later.

The lateral projecting body 180 is fixed to the outer peripheral side surface of the lateral tubular body 170 and rotates integrally with the lateral tubular body 170. The lateral projecting body 180 has a bar shape projecting from the outer peripheral side surface of the lateral tubular body 170 in the radial direction of the lateral tubular body 170. Four lateral protrusions 180 are juxtaposed at substantially equal intervals (including equal intervals) in the direction around the axis B of the horizontal axis 160 when viewed from the axis B direction of the horizontal axis 160. In the present embodiment, the lateral protrusions 180, 180, 180, and 180 are juxtaposed at intervals of 90 ° in the direction around the axis B of the horizontal axis 160 when viewed from the direction of the axis B of the horizontal axis 160.
Therefore, in the present embodiment, the same number (four) of the protrusions 130, 140, and 180 are provided.

  In the present embodiment, one horizontal axis 160 is provided on the outer peripheral side surface of the vertical cylindrical body 150. However, the present invention is not limited to this, and a plurality of horizontal axes 160 may be provided. In this case, on the outer peripheral side surface of the vertical cylindrical body 150, a plurality of horizontal shafts 160 are juxtaposed at intervals in the direction around the axis A of the excavation shaft 121, and the horizontal cylindrical bodies 170 and the lateral protrusions are projected on the horizontal shafts 160. Each body 180 is to be worn.

6 (a) to 10 (b) show that the excavation shaft 121 and the outer shaft 122 are rotated in directions opposite to each other around the axis A of the excavation shaft 121 and the absolute value of the rotation speed L1 of the excavation shaft 121 is obtained. The movement of the lateral protrusion 180 is shown when no difference is provided between the absolute value of the rotational speed N1 of the outer shaft 122 (L1 = −N1).
The ground improvement device 100 is shown in FIG. 6A (FIG. 6B) → FIG. 7A (FIG. 7B) → FIG. 8A (FIG. 8B) → FIG. 9A. The driving is performed in the order of (FIG. 9B) → FIG. 10A (FIG. 10B).

As shown in FIGS. 6A to 10B, the rotation trajectory of the horizontal protrusion 180 around the axis B of the horizontal shaft 160 intersects with the rotation trajectory of the upper protrusion 130 around the axis A of the excavation shaft 121. At the same time, the lower projecting body 140 is configured to intersect with the rotation locus around the axis A of the excavation shaft 121.
Thereby, when the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, the upper projecting body 130 and the lower projecting body 140 are configured to contact the lateral projecting body 180. .

As shown in FIGS. 6A to 10B, when the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, the upper protrusion 130 and the lower protrusion 140 are lateral. The horizontal protrusion 180 (horizontal cylindrical body 170) is configured to rotate around the axis B of the horizontal axis 160 by pressing the horizontal protrusion 180 in contact with the protrusion 180.
At this time, one horizontal protrusion 180 existing above the horizontal shaft 160 enters between the adjacent upper protrusions 130 and 130 and is pushed in one direction P1 by the upper protrusion 130, and at the same time the horizontal shaft 160 One lateral projecting body 180 existing on the lower side enters between adjacent lower projecting bodies 140 and 140 and is pushed by the lower projecting body 140 in a direction Q1 opposite to the one direction (see FIG. 6 (a)). That is, one of the lateral protrusions 180 and 180 existing on the opposite sides of the horizontal shaft 160 is pushed in one direction P1 by the upper protrusion 130, and the other is pushed in the one direction P1 by the lower protrusion 140. The state is pushed in the opposite direction Q1. As a result, the lateral protrusion 180 rotates around the axis B of the lateral axis 160. Then, the next (downstream) lateral protrusion 180 enters between the next adjacent upper protrusions 130 and 130 (lower protrusions 140 and 140).
When the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, this series of operations is repeated, whereby the lateral protrusion 180 continues to rotate about the axis B of the horizontal shaft 160. It will be.
Further, when the upper projecting body 130 and the lower projecting body 140 are rotated relative to each other around the axis A of the excavation shaft 121, the rotation trajectory of the lateral projecting body 180 around the axis B of the horizontal shaft 160 and the excavation of the upper projecting body 130. The upper projecting body 130 and the lateral projecting body 180 pass alternately at a place where the rotational trajectories of the shaft 121 around the axis A intersect, and the lateral projecting body 180 has a rotational trajectory about the axis B of the lateral axis 160 and the lower part. The lower projecting body 140 and the lateral projecting body 180 pass alternately at a location where the rotation trajectory around the axis A of the excavation shaft 121 in the projecting body 140 intersects.

  By configuring as described above, the lateral protrusion 180 can be rotated around the axis B of the horizontal axis 160 without restricting the rotation of the horizontal axis 160 around the axis A. Thereby, it becomes possible to rotate the horizontal protrusion 180 around the axis B of the horizontal axis 160 with a simple device configuration.

Further, the lateral projecting body 180 is configured to be rotated by being pushed by the two projecting bodies 130 and 140, whereby the load on the lateral projecting body 180 is configured to be distributed. Further, the lateral projecting body 180 and the vertical tubular body 150 are configured to be integrally rotatable relative to the excavation shaft 121 and the outer shaft 122 around the axis A of the excavation shaft 121, thereby The body 180 is configured to rotate around the axis A of the excavation shaft 121 together with the vertical cylindrical body 150 when a load is applied, and to escape.
Therefore, the load applied to the lateral protrusion 180 can be reduced, and the durability of the apparatus can be improved.

As described above, by rotating the upper projecting body 130 and the lower projecting body 140 relative to each other about the axis A of the excavation shaft 121, the lateral projecting body 180 can be rotated about the axis B of the horizontal shaft 160. In this case, the number of the upper projecting body 130, the lower projecting body 140, and the lateral projecting body 180 may not be limited to four as in the present embodiment. For example, the projecting bodies 130 and 140 are not limited to four.・ You may provide three 180 or eight. Further, for example, three upper protrusions 130 and three lower protrusions 140 may be provided, and four lateral protrusions 180 may be provided.
Further, as described above, by rotating the upper projecting body 130 and the lower projecting body 140 relative to each other around the axis A of the excavating shaft 121, the lateral projecting body 180 can be rotated about the axis B of the horizontal axis 160. If so, with respect to the distance between the upper protrusions 130, 130..., The distance between the lower protrusions 140, 140. There is no need for the interval, and there may be some variation in the interval.
Further, as described above, by rotating the upper projecting body 130 and the lower projecting body 140 relative to each other around the axis A of the excavating shaft 121, the lateral projecting body 180 can be rotated about the axis B of the horizontal axis 160. In this case, the axis B of the horizontal axis 160 does not have to be strictly perpendicular to the axis A of the excavating shaft 121, and may be slightly deviated from the vertical state.

  Below, operation | movement of the ground improvement apparatus 100 is demonstrated.

As shown in FIGS. 6A to 10B, the ground improvement device 100 descends while rotating the excavation shaft 121 and the outer shaft 122 around the axis A of the excavation shaft 121 by the rotation drive device 110. By doing so, the ground is excavated by the excavating blade 103. At this time, the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, so that the upper stirring blade 101 and the lower stirring blade 102 rotate at different speeds around the axis A of the excavation shaft 121. To do. At this time, due to the rotation of the excavating shaft 121 (upper protruding body 130) and the outer shaft 122 (lower protruding body 140), the horizontal protruding body 180 rotates and the horizontal stirring blade 104 rotates around the axis B of the horizontal axis 160. Rotate. At this time, the ground improvement device 100 discharges the solidified material from the solidified material discharge hole at the lower end of the excavation shaft 121.
As a result, the excavated soil and the solidified material are agitated around the axis A of the excavating shaft 121 by the upper agitating blade 101 and the lower agitating blade 102, and stirred around the axis B of the horizontal axis 160 by the horizontal agitating blade 104 (up and down) Stirring).

When the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121, the absolute value of the rotation speed L1 of the excavation shaft 121 and the absolute value of the rotation speed N1 of the outer shaft 122 are A difference may be provided between them (| L1 | ≠ | N1 |). For example, as shown in FIGS. 11A and 11B, when the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121 by the rotation drive device 110, the excavation shaft 121 is rotated at a high speed, and the outer shaft 122 is rotated at a low speed in a direction opposite to the rotation direction of the excavation shaft 121.
In this case, there is a difference between the absolute value of the rotation speed L1 of the excavation shaft 121 (upper protrusion 130) and the absolute value of the rotation speed N1 of the outer shaft 122 (lower protrusion 140), thereby causing the vertical cylinder The shaped body 150 (lateral projecting body 180) rotates about the axis A of the excavation shaft 121. As a result, the laterally projecting body 180 (the horizontal stirring blade 104) rotates around the axis A of the excavating shaft 121 while rotating around the axis B of the horizontal shaft 160. It becomes possible to stir the solidified material better (see FIGS. 11A and 11B).

  In addition, you may comprise the protrusions 130, 140, and 180 as an upper stirring blade, a lower stirring blade, and a horizontal stirring blade, respectively. In the case of such a configuration, the stirring blades 101, 102, and 104 may not be provided. However, even in the case of such a configuration, the stirring blades 101, 102, and 104 may be further provided in order to better stir the excavated soil and the solidified material. Further, the size of the mechanism (projection bodies 130, 140, 180, etc.) for rotating the horizontal cylindrical body 170 around the axis B of the horizontal axis 160 is not particularly limited. In order to easily secure the installation space, it may be configured smaller (shorter) than those shown in FIG. 1, FIG. 2 (a), FIG. 2 (b) and the like.

As shown in FIGS. 12 and 13, the middle stirring blade 105 may be fixed to the outer peripheral side surface (or the horizontal axis 160) of the vertical cylindrical body 150. The middle stirring blade 105 is a substantially plate-like member, protrudes outward from the outer peripheral side surface of the vertical cylindrical body 150, and rotates integrally with the vertical cylindrical body 150.
When the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121, the absolute value of the rotation speed L1 of the excavation shaft 121 and the absolute value of the rotation speed N1 of the outer shaft 122 are A difference is provided between them (| L1 | ≠ | N1 |).
With this configuration, when the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, the absolute value of the rotation speed L1 of the excavation shaft 121 and the absolute value of the rotation speed N1 of the outer shaft 122 are determined. Due to the difference between the values, the vertical cylindrical body 150 rotates around the axis A of the excavation shaft 121. At this time, the outer shaft 122 (upper stirring blade 101), the vertical cylindrical body 150 (middle stirring blade 105), and the excavation shaft 121 (lower stirring blade 102) are different around the axis A of the excavation shaft 121, respectively. The motor rotates at the speeds N1, M1, and L1 (see FIG. 13).
Accordingly, the stirring blades 101, 105, and 102 can be rotated around the axis A of the excavation shaft 121 at three different speeds N1, M1, and L1, respectively, so that the excavated soil and the solidified material can be improved. It becomes possible to stir.
The horizontal axis 160 may be configured as a middle stirring blade. In the case of such a configuration, the middle stirring blade 105 may not be provided. However, even in the case of such a configuration, an intermediate stirring blade 105 may be further provided in order to better stir the excavated soil and the solidified material.

[Second Embodiment]
Below, the ground improvement apparatus 200 is demonstrated.

  In the following description, it demonstrates paying attention to difference with the ground improvement apparatus 100, about the same structure as the ground improvement apparatus 100, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 14, FIG. 15 (a), and FIG. 15 (b), the ground improvement device 200 includes a rotation driving device 110, a shaft body 120, a ring body 210, and upper protrusions 220, 220,. ..., the lower projecting bodies 230, 230 ..., the connecting body 240, the vertical cylindrical body 250, the horizontal shaft 260, the horizontal cylindrical body 270, and the lateral projecting bodies 280, 280, ... It has.

  An inner stirring blade 201 is fixed to the outer peripheral side surface of the protruding portion 121 a of the excavation shaft 121. The inner stirring blade 201 is a substantially plate-like member, protrudes outward from the outer peripheral side surface of the protruding portion 121 a of the excavation shaft 121, and rotates integrally with the excavation shaft 121. The inner stirring blade 201 is disposed in the middle part of the protrusion 121a. In addition, you may fix the inner stirring blade 201 to the upper protrusion 220 mentioned later.

  The ring body 210 has a cylindrical shape whose upper and lower ends are open. A projecting portion 121 a of the excavation shaft 121 is inserted through the ring body 210. The ring body 210 is supported so as to be rotatable relative to the excavation shaft 121 around the axis A of the excavation shaft 121.

  The upper protrusion 220 is fixed to the outer peripheral side surface of the protrusion 121 a of the excavation shaft 121 and rotates integrally with the excavation shaft 121. The upper protrusion 220 has a bar shape that protrudes in the radial direction of the excavation shaft 121 from the outer peripheral side surface of the protrusion 121 a of the excavation shaft 121. Four upper projecting bodies 220 are juxtaposed at substantially equal intervals (including equal intervals) in the direction around the axis A of the excavation shaft 121 when viewed from the axis A direction of the excavation shaft 121. The upper projecting body 220 is disposed between the outer shaft 122 and the ring body 210. In the present embodiment, the upper projecting bodies 220, 220, 220, and 220 are juxtaposed at intervals of 90 ° in the direction around the axis A of the excavation shaft 121 when viewed from the axis A direction of the excavation shaft 121.

  The lower protrusion 230 is fixed to the outer peripheral side surface of the ring body 210 and rotates integrally with the ring body 210. The lower protrusion 230 has a rod shape that protrudes from the outer peripheral side surface of the ring 210 in the radial direction of the ring 210. Four lower protrusions 230 are juxtaposed at substantially equal intervals (including equal intervals) in the direction around the axis A of the excavation shaft 121 when viewed from the axis A direction of the excavation shaft 121. In the present embodiment, the lower projecting bodies 230, 230, 230, and 230 are juxtaposed at intervals of 90 ° in the direction around the axis A of the excavation shaft 121 as viewed from the direction of the axis A of the excavation shaft 121.

  The connecting body 240 has a bent bar shape. The connecting body 240 has a shape in which a midway portion bulges outward, and an outer stirring blade 202 is fixed to the inner peripheral surface of the bulging portion. The connecting body 240 has one end fixed to the outer shaft 122 and the other end fixed to the ring body 210, and connects the outer shaft 122 and the ring body 210. Thus, when the outer shaft 122 rotates around the axis A of the excavation shaft 121, the connecting body 240 and the ring body 210 are configured to rotate integrally with the outer shaft 122. And when the connection body 240 rotates integrally with the outer side axis | shaft 122, the outer stirring blade 202 rotates with the connection body 240, and stirs soil. The outer stirring blade 202 may be fixed to the outer shaft 122 and / or the ring body 210.

As shown in FIGS. 14 and 22, the vertical cylindrical body 250 has a cylindrical shape with both upper and lower ends opened. The protruding portion 121 a of the excavation shaft 121 is inserted through the vertical cylindrical body 250. The vertical cylindrical body 250 is supported so as to be rotatable relative to the excavation shaft 121, the outer shaft 122, and the ring body 210 around the axis A of the excavation shaft 121. The vertical tubular body 250 is disposed between the upper projecting body 220 and the lower projecting body 230. A flange portion 121c is formed on the protruding portion 121a of the excavating shaft 121 so as to sandwich the vertical cylindrical body 250 from above and below. The flange portion 121c is integrated with the protruding portion 121a of the excavation shaft 121, and restricts the vertical cylindrical body 250 from moving in the vertical direction (movement in the axis A direction).
In addition, as shown in FIG. 16, it comprises so that the protrusion part 121a of the excavation shaft 121 and the ring body 210 may penetrate with respect to the vertical cylindrical body 250, the flange part 122c is formed in the ring body 210, and the said You may comprise so that the vertical movement of the vertical cylindrical body 150 may be controlled by the flange part 122c.

  As shown in FIGS. 14 and 22, the horizontal shaft 260 is fixed to the outer peripheral side surface of the vertical cylindrical body 250 and rotates integrally with the vertical cylindrical body 250. The horizontal axis 260 has a rod shape protruding in the radial direction of the vertical cylindrical body 250, and has an axis C that is substantially perpendicular (including vertical) to the axis A of the excavation axis 121. The horizontal axis 260 is disposed between the upper protrusion 220 and the lower protrusion 230.

  The horizontal cylindrical body 270 has a cylindrical shape that is open at both ends in the horizontal direction. A horizontal shaft 260 is inserted through the horizontal cylindrical body 270. The horizontal cylindrical body 270 is supported so as to be rotatable relative to the horizontal axis 260 about the axis C of the horizontal axis 260. A pin 261 is attached to the horizontal shaft 260 to prevent the horizontal cylindrical body 270 from falling off the horizontal shaft 260.

  A horizontal stirring blade 203 is fixed to the outer peripheral side surface of the horizontal cylindrical body 270. The horizontal stirring blade 203 is a substantially plate-like member, protrudes outward from the outer peripheral side surface of the horizontal cylindrical body 270, and rotates integrally with the horizontal cylindrical body 270. In addition, you may fix the horizontal stirring blade 203 to the horizontal protrusion 280 mentioned later.

The lateral protrusion 280 is fixed to the outer peripheral side surface of the lateral cylindrical body 270 and rotates integrally with the lateral cylindrical body 270. The lateral projecting body 280 has a bar shape projecting from the outer peripheral side surface of the lateral tubular body 270 in the radial direction of the lateral tubular body 270. Four lateral protrusions 280 are juxtaposed at substantially equal intervals (including equal intervals) in the direction around the axis C of the horizontal axis 260 when viewed from the direction of the axis C of the horizontal axis 260. In the present embodiment, the lateral protrusions 280, 280, 280, and 280 are juxtaposed at intervals of 90 ° in the direction around the axis C of the horizontal axis 260 when viewed from the direction of the axis C of the horizontal axis 260.
Therefore, in the present embodiment, the same number (four) of the protrusions 220, 230, and 280 are provided.

  In the present embodiment, one horizontal axis 260 is provided on the outer peripheral side surface of the vertical cylindrical body 250. However, the present invention is not limited to this, and a plurality of horizontal axes 260 may be provided. In this case, on the outer peripheral side surface of the vertical cylindrical body 250, a plurality of horizontal shafts 260 are juxtaposed at intervals in the direction around the axis A of the excavating shaft 121, and the horizontal cylindrical body 270 and the lateral protrusion are projected on each horizontal shaft 260. Each body 280 is to be worn.

17 (a) to 21 (b) show that the excavation shaft 121 and the outer shaft 122 are rotated in directions opposite to each other around the axis A of the excavation shaft 121 and the absolute value of the rotation speed L2 of the excavation shaft 121 is obtained. The movement of the lateral protrusion 280 when there is no difference between the absolute value of the rotational speed N2 of the outer shaft 122 (L2 = −N2) is shown.
The ground improvement apparatus 200 is shown in FIG. 17A (FIG. 17B) → FIG. 18A (FIG. 18B) → FIG. 19A (FIG. 19B) → FIG. 20A. The driving is performed in the order of (FIG. 20B) → FIG. 21A (FIG. 21B).

As shown in FIGS. 17A to 21B, the rotation trajectory around the axis C of the horizontal shaft 260 in the lateral protrusion 280 intersects with the rotation trajectory around the axis A of the excavation shaft 121 in the upper protrusion 220. At the same time, the lower projecting body 230 is configured to intersect with the rotation locus around the axis A of the excavation shaft 121.
Thereby, when the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, the upper projecting body 220 and the lower projecting body 230 are configured to contact the lateral projecting body 280. .

As shown in FIGS. 17A to 21B, when the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, the upper protrusion 220 and the lower protrusion 230 are lateral. The horizontal protrusion 280 (horizontal cylindrical body 270) is configured to rotate around the axis C of the horizontal axis 260 by pressing the horizontal protrusion 280 in contact with the protrusion 280.
At this time, one horizontal protrusion 280 existing above the horizontal shaft 260 enters between the adjacent upper protrusions 220 and 220 and is pushed in one direction P2 by the upper protrusion 220, and at the same time the horizontal shaft 260 One lateral projecting body 280 existing on the lower side enters between adjacent lower projecting bodies 230 and 230 and is pushed by the lower projecting body 230 in a direction Q2 opposite to the one direction ( FIG. 17 (a)). That is, one of the horizontal protrusions 280 and 280 existing on the opposite sides of the horizontal shaft 260 is pushed in one direction P2 by the upper protrusion 220, and the other is pressed in the one direction P2 by the lower protrusion 230. The state is pushed in the opposite direction Q2. Thereby, the horizontal protrusion 280 rotates around the axis C of the horizontal axis 260. Then, the next (downstream) lateral protrusion 280 enters between the next adjacent upper protrusions 220 and 220 (lower protrusions 230 and 230).
When the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, this series of operations is repeated, whereby the lateral protrusion 280 continues to rotate about the axis C of the horizontal shaft 260. It will be.
When the upper projecting body 220 and the lower projecting body 230 are rotated relative to each other around the axis A of the excavation shaft 121, the rotation trajectory of the lateral projection body 280 about the axis C of the horizontal axis 260 and the excavation of the upper projection body 220 are excavated. The upper projecting body 220 and the lateral projecting body 280 pass alternately at the location where the rotational trajectories of the shaft 121 around the axis A intersect, and the lateral projecting body 280 has a rotational trajectory about the axis C of the lateral axis 260 and the lower The lower projecting body 230 and the lateral projecting body 280 are alternately passing at the location where the rotation trajectories of the projecting body 230 around the axis A of the excavation shaft 121 intersect.

  With the configuration described above, the lateral protrusion 280 can be rotated about the axis C of the horizontal axis 260 without restricting the rotation of the horizontal axis 160 about the axis A. Thereby, the horizontal protrusion 280 can be rotated around the axis C of the horizontal axis 260 with a simple device configuration.

Further, the lateral projecting body 280 is configured to be rotated by being pushed by the two projecting bodies 220 and 230, and thereby, the load applied to the lateral projecting body 280 is configured to be distributed. Further, the lateral projecting body 280 and the vertical cylindrical body 250 are configured to be integrally rotatable relative to the excavation shaft 121 and the outer shaft 122 around the axis A of the excavation shaft 121, thereby The body 280 is configured to rotate around the axis A of the excavating shaft 121 together with the vertical cylindrical body 250 when a load is applied, and to escape.
Therefore, the load applied to the lateral protrusion 280 can be reduced, and the durability of the apparatus can be improved.

In addition, as described above, the horizontal protrusion 280 can be rotated around the axis C of the horizontal shaft 260 by rotating the upper protrusion 220 and the lower protrusion 230 relative to each other around the axis A of the excavation shaft 121. In this case, the number of the upper projecting body 220, the lower projecting body 230, and the lateral projecting body 280 is not limited to four as in the present embodiment. For example, the projecting bodies 220 and 230 are not limited to four. -Three 280s may be provided, or eight 280s may be provided. Further, for example, three upper protrusions 220 and three lower protrusions 230 may be provided, and four lateral protrusions 280 may be provided.
Further, as described above, by rotating the upper projecting body 220 and the lower projecting body 230 relative to each other around the axis A of the excavating shaft 121, the lateral projecting body 280 can be rotated about the axis C of the horizontal axis 260. , The spacing between the upper protrusions 220, 220..., The spacing between the lower protrusions 230, 230..., And the spacing between the lateral protrusions 280, 280. There is no need for the interval, and there may be some variation in the interval.
Further, as described above, by rotating the upper projecting body 220 and the lower projecting body 230 relative to each other around the axis A of the excavating shaft 121, the lateral projecting body 280 can be rotated about the axis C of the horizontal axis 260. In this case, the axis C of the horizontal axis 260 does not have to be strictly perpendicular to the axis A of the excavation axis 121, and may be slightly deviated from the vertical state.

  Below, operation | movement of the ground improvement apparatus 200 is demonstrated.

As shown in FIGS. 17A to 21B, the ground improvement device 200 is lowered while the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121 by the rotation drive device 110. By doing so, the ground is excavated by the excavating blade 103. At this time, the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, so that the connecting body 240 (outer stirring blade 202) and the inner stirring blade 201 move around the axis A of the excavation shaft 121. Rotates at different speeds. At this time, the horizontal protrusion 280 is rotated by the rotation of the excavation shaft 121 (upper protrusion 220) and the outer shaft 122 (lower protrusion 230), and the horizontal stirring blade 203 is rotated about the axis C of the horizontal axis 260. Rotate. At this time, the ground improvement device 200 discharges the solidified material from the solidified material discharge hole at the lower end of the excavation shaft 121.
As a result, the excavated soil and the solidified material are agitated around the axis A of the excavating shaft 121 by the connecting body 240 (outer agitating blade 202) and the inner agitating blade 201, and around the axis C of the horizontal axis 260 by the lateral agitating blade 203. Will be stirred (up and down).

When the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121, the absolute value of the rotation speed L2 of the excavation shaft 121 and the absolute value of the rotation speed N2 of the outer shaft 122 are A difference may be provided between them (| L2 | ≠ | N2 |). For example, as shown in FIGS. 22A and 22B, when the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121 by the rotation drive device 110, the excavation shaft 121 is rotated at a high speed, and the outer shaft 122 is rotated at a low speed in a direction opposite to the rotation direction of the excavation shaft 121.
In this case, there is a difference between the absolute value of the rotational speed L2 of the excavating shaft 121 (upper protrusion body 220) and the absolute value of the rotational speed N2 of the outer shaft 122 (lower protrusion body 230). The shaped body 250 (lateral projecting body 280) rotates around the axis A of the excavation shaft 121. As a result, the laterally projecting body 280 (lateral stirring blade 203) rotates around the axis A of the excavating shaft 121 while rotating around the axis C of the horizontal shaft 260. It becomes possible to stir the solidified material better (see FIGS. 22A and 22B).

  Note that the protrusions 220, 230, and 280 may be configured as outer stirring blades, stirring blades, and horizontal stirring blades, respectively. In the case of such a configuration, the stirring blades 202, 201, and 203 need not be provided. However, even in the case of such a configuration, the stirring blades 202, 201, and 203 may be further provided so that the excavated soil and the solidified material can be stirred more satisfactorily. Further, the size of the mechanism (projection body 220, 230, 280, etc.) for rotating the horizontal cylindrical body 270 around the axis C of the horizontal axis 260 is not particularly limited. In order to easily secure the installation space, it may be configured smaller (shorter) than those shown in FIG. 14, FIG. 15 (a), FIG. 15 (b) and the like.

As shown in FIGS. 23 and 24, the middle stirring blade 204 may be fixed to the outer peripheral side surface (or the horizontal axis 260) of the vertical cylindrical body 250. The middle stirring blade 204 is a substantially plate-like member, protrudes outward from the outer peripheral side surface of the vertical cylindrical body 250, and rotates integrally with the vertical cylindrical body 250.
When the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121, the absolute value of the rotation speed L2 of the excavation shaft 121 and the absolute value of the rotation speed N2 of the outer shaft 122 are A difference is provided between them (| L1 | ≠ | N1 |).
With this configuration, when the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, the absolute value of the rotation speed L <b> 2 of the excavation shaft 121 and the absolute value of the rotation speed N <b> 2 of the outer shaft 122. Due to the difference between the values, the vertical cylindrical body 250 rotates around the axis A of the excavation shaft 121. At this time, the outer shaft 122 (outer stirring blade 202), the vertical cylindrical body 250 (middle stirring blade 204), and the excavation shaft 121 (inner stirring blade 201) are different around the axis A of the excavation shaft 121. It will rotate at speed L2, M2, and N2 (refer FIG. 24).
Therefore, since the stirring blades 202, 204, and 201 can be rotated around the axis A of the excavation shaft 121 at three different speeds L2, M2, and N2, respectively, the excavated soil and the solidified material can be improved. It becomes possible to stir.
In addition, you may comprise the horizontal axis 260 as a middle stirring blade. In the case of such a configuration, the middle stirring blade 204 may not be provided. However, even in the case of such a configuration, an intermediate stirring blade 204 may be further provided in order to better stir the excavated soil and the solidified material.

[Third embodiment]
Below, the ground improvement apparatus 300 is demonstrated.

  In the following description, it demonstrates paying attention to difference with the ground improvement apparatuses 100 and 200, about the same structure as the ground improvement apparatuses 100 and 200, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The ground improvement device 300 has a configuration in which the ground improvement device 100 of the first embodiment and the ground improvement device 200 of the second embodiment are combined, and has the same effects as the ground improvement devices 100 and 200. Therefore, in the following, detailed description of the configuration, operational effects, and the arrangement structure of the stirring blades of the ground improvement device 300 will be omitted, and the description will be focused on the differences.

  As shown in FIG. 25, the ground improvement device 300 includes a rotation drive device 110, a shaft body 120, upper projecting bodies (first upper projecting bodies) 130, 130..., And lower projecting bodies (first lower projecting bodies). 140, 140..., A vertical cylindrical body (first vertical cylindrical body) 150, a horizontal axis (first horizontal axis) 160, a horizontal cylindrical body (first horizontal cylindrical body) 170, .., A ring 210, an upper protrusion (second upper protrusion) 220, 220, and a lower protrusion (second lower protrusion) , 230, 230..., A connecting body 240, a vertical cylindrical body (second vertical cylindrical body) 250, a horizontal axis (second horizontal axis) 260, and a horizontal cylindrical body (second horizontal cylindrical shape). Body) 270 and laterally projecting bodies (second laterally projecting bodies) 280, 280.

The lower protrusion (first lower protrusion) 140 and the upper protrusion (second upper protrusion) 220 are disposed between the outer shaft 122 and the ring body 210.
The horizontal axis (first horizontal axis) 160 and the horizontal axis (second horizontal axis) 260 are arranged at a predetermined interval from each other.
The predetermined interval is such that when the excavation shaft 121 and the outer shaft 122 rotate relative to each other around the axis A of the excavation shaft 121, the lateral projecting body 180 and the lateral projecting body 280 do not collide with each other. Is the interval.

In the case of the configuration as described above, by rotating the excavation shaft 121 and the outer shaft 122 relative to each other around the axis A of the excavation shaft 121, the lateral projecting body (first lateral projecting body) 180 is The horizontal protrusion (second horizontal protrusion) 280 can be rotated around the axis C of the horizontal axis (second horizontal axis) 260, and the horizontal protrusion at this time can be further rotated. The rotation direction of the protrusion 180 around the axis B and the rotation direction of the horizontal protrusion 280 around the axis C can be opposite to each other (see the two-dot chain arrow in FIG. 26). Thus, the excavated soil and the solidified material can be better stirred by the stirring blades attached to the lateral protrusions 180 and 280 and / or the lateral protrusions 180 and 280.
Further, when the excavation shaft 121 and the outer shaft 122 are rotated relative to each other around the axis A of the excavation shaft 121, the absolute value of the rotation speed of the excavation shaft 121 and the absolute value of the rotation speed of the outer shaft 122 are between By providing the difference, the lateral protrusions 180 and 280 can be rotated around the axis A of the excavation shaft 121 (see solid arrows in FIG. 26). Thus, the excavated soil and the solidified material can be better stirred by the stirring blades attached to the lateral protrusions 180 and 280 and / or the lateral protrusions 180 and 280.

100/200/300 Ground improvement device 120 Shaft body 121 Excavation shaft 122 Outer shaft 130/220 Upper projecting body 140/230 Lower projecting body 150/250 Vertical tubular body 160/260 Horizontal shaft 170/270 Horizontal tubular body 180 / 280 lateral projection 210 ring 240 connection

Claims (6)

A digging shaft and an outer shaft through which the digging shaft is inserted, the digging shaft having a projecting portion projecting in the axial direction of the digging shaft from within the outer shaft, and the digging shaft and the outer shaft are mutually connected A shaft body configured to be relatively rotatable about the axis of the excavation shaft;
An upper projecting body fixed to the outer shaft and juxtaposed in a predetermined number in the direction around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
A lower projecting body fixed to the projecting portion of the excavation shaft and juxtaposed at a predetermined number of intervals around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
A vertical tubular body through which the excavation shaft is inserted, disposed between the upper projecting body and the lower projecting body, and rotatable relative to the excavation shaft and the outer shaft around the axis of the excavation shaft;
A horizontal axis fixed to the vertical cylindrical body and having an axis substantially perpendicular to the axis of the excavation axis;
A horizontal cylindrical body that is inserted through the horizontal axis and is rotatable about the axis of the horizontal axis;
A laterally projecting body fixed to the horizontal cylindrical body, and juxtaposed in a predetermined number in the direction around the axis of the horizontal axis when viewed from the axial direction of the horizontal axis;
With
A rotation locus around the axis of the horizontal axis in the lateral protrusion intersects with a rotation locus around the axis of the excavation shaft in the upper protrusion, and also intersects with a rotation locus around the axis of the excavation axis in the lower protrusion. Configured as
By rotating the excavating shaft and the outer shaft relative to each other about the axis of the excavating shaft, the upper projecting body and the lower projecting body push the lateral projecting body so that the lateral projecting body is rotated about the axis of the horizontal axis. Rotate to
Ground improvement device. A digging shaft and an outer shaft through which the digging shaft is inserted, the digging shaft having a projecting portion projecting in the axial direction of the digging shaft from within the outer shaft, and the digging shaft and the outer shaft are mutually connected A shaft body configured to be relatively rotatable about the axis of the excavation shaft;
An annular body through which the projecting portion of the excavation shaft is inserted and rotatable relative to the excavation shaft around the axis of the excavation shaft;
Fixed to the projecting portion of the excavation shaft, disposed between the outer shaft and the ring body, and a predetermined number of juxtaposed at substantially equal intervals around the axis of the excavation shaft when viewed from the axial direction of the excavation shaft An upper protrusion,
A lower protrusion that is fixed to the ring body and is juxtaposed in a predetermined number in the direction around the axis of the excavation shaft as viewed from the axial direction of the excavation axis;
One end fixed to the outer shaft and the other end fixed to the ring,
A vertical cylinder through which the excavation shaft is inserted and which is disposed between the upper projecting body and the lower projecting body and is relatively rotatable around the axis of the excavation shaft with respect to the excavation shaft, the outer shaft, and the ring body And
A horizontal axis fixed to the vertical cylindrical body and having an axis substantially perpendicular to the axis of the excavation axis;
A horizontal cylindrical body that is inserted through the horizontal axis and is rotatable about the axis of the horizontal axis;
A laterally projecting body fixed to the horizontal cylindrical body, and juxtaposed in a predetermined number in the direction around the axis of the horizontal axis when viewed from the axial direction of the horizontal axis;
With
A rotation locus around the axis of the horizontal axis in the lateral protrusion intersects with a rotation locus around the axis of the excavation shaft in the upper protrusion, and also intersects with a rotation locus around the axis of the excavation axis in the lower protrusion. Configured as
By rotating the excavating shaft and the outer shaft relative to each other about the axis of the excavating shaft, the upper projecting body and the lower projecting body push the lateral projecting body so that the lateral projecting body is rotated about the axis of the horizontal axis. Rotate to
Ground improvement device. The lateral protrusion is configured to have a function as a stirring blade, and / or the stirring blade is fixed to the horizontal cylindrical body,
The ground improvement apparatus of Claim 1 or Claim 2. When rotating the excavation shaft and the outer shaft relative to each other around the axis of the excavation shaft, the absolute value of the rotation speed of the excavation shaft around the axis of the excavation shaft and the axis of the excavation shaft at the outer shaft By rotating the lateral protrusion around the axis of the excavation shaft by providing a difference between the absolute value of the rotation speed of
The ground improvement apparatus as described in any one of Claims 1-3. The horizontal axis has a function as a stirring blade, and / or the stirring blade is fixed to the vertical cylindrical body,
When rotating the excavation shaft and the outer shaft relative to each other around the axis of the excavation shaft, the absolute value of the rotation speed of the excavation shaft around the axis of the excavation shaft and the axis of the excavation shaft at the outer shaft By rotating the vertical cylindrical body around the axis of the excavation axis at a speed different from that of the excavation axis and the outer axis, by providing a difference between the absolute value of the rotation speed of
The ground improvement apparatus as described in any one of Claims 1-4. A digging shaft and an outer shaft through which the digging shaft is inserted, the digging shaft having a projecting portion projecting in the axial direction of the digging shaft from within the outer shaft, and the digging shaft and the outer shaft are mutually connected A shaft body configured to be relatively rotatable about the axis of the excavation shaft;
An annular body through which the projecting portion of the excavation shaft is inserted and rotatable relative to the excavation shaft around the axis of the excavation shaft;
A first upper projecting body fixed to the outer shaft and juxtaposed in a predetermined number in the direction around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
Fixed to the projecting portion of the excavation shaft, disposed between the outer shaft and the ring body, and a predetermined number of juxtaposed at substantially equal intervals around the axis of the excavation shaft when viewed from the axial direction of the excavation shaft A first lower projecting body,
Fixed to the projecting portion of the excavation shaft, disposed between the outer shaft and the ring body, and a predetermined number of juxtaposed at substantially equal intervals around the axis of the excavation shaft when viewed from the axial direction of the excavation shaft A second upper protrusion,
A second lower projecting body fixed to the ring body and juxtaposed at a predetermined number of intervals around the axis of the excavation shaft as viewed from the axial direction of the excavation shaft;
One end fixed to the outer shaft and the other end fixed to the ring,
The excavation shaft is inserted and disposed between the first upper protrusion and the first lower protrusion, and rotates relative to the excavation shaft, the outer shaft, and the ring body around the excavation axis. Possible first vertical cylindrical body,
A first horizontal axis fixed to the first vertical cylindrical body and having an axis substantially perpendicular to the axis of the excavation axis;
A first horizontal cylindrical body through which the first horizontal axis is inserted and rotatable about the axis of the first horizontal axis;
A first lateral protrusion fixed to the first horizontal cylindrical body and juxtaposed with a predetermined number of portions at substantially equal intervals around the axis of the first horizontal axis when viewed from the axial direction of the first horizontal axis; ,
The excavation shaft is inserted, and is disposed between the second upper protrusion and the second lower protrusion, and rotates relative to the excavation shaft, the outer shaft, and the ring body around the excavation axis. A possible second vertical cylinder;
A second horizontal axis fixed to the second vertical cylindrical body, disposed at a predetermined interval with respect to the first horizontal axis, and having an axis substantially perpendicular to the axis of the excavation axis;
A second horizontal cylindrical body that is inserted through the second horizontal axis and is rotatable about the axis of the second horizontal axis;
A second lateral protrusion fixed to the second horizontal cylindrical body and juxtaposed at a predetermined number of intervals around the axis of the first horizontal axis when viewed from the axial direction of the first horizontal axis; ,
With
The rotation trajectory around the axis of the first horizontal axis in the first lateral protrusion intersects with the rotation trajectory around the axis of the excavation axis in the first upper protrusion, and the excavation axis in the first lower protrusion. Configured to intersect with the rotation trajectory around the axis of
The rotation trajectory of the second horizontal protrusion around the second horizontal axis intersects the rotation trajectory of the second upper protrusion around the excavation axis and the excavation axis of the second lower protrusion. Configured to intersect with the rotation trajectory around the axis of
The first lateral protrusion is pushed by the first upper protrusion and the first lower protrusion by rotating the excavation shaft and the outer shaft relative to each other around the axis of the excavation shaft. The body is rotated about the axis of the first horizontal axis, and the second horizontal protrusion is pushed by the second upper protrusion and the second lower protrusion, and the second horizontal protrusion is moved to the second horizontal axis. Rotate around the axis,
Ground improvement device.

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