JP3109482U - Ground improvement machine co-rotation prevention device - Google Patents

Abstract

[PROBLEMS] To stably inject and maintain a ground improvement agent during work, and to support a swivel joint and a tube body securely to a leader during transportation to prevent co-rotation of a ground improvement machine capable of stable running without danger. Providing equipment.
In a ground improvement machine that performs excavation by penetrating and rotating a rotating tube body that holds a stirring blade at a lower end, a guide member that moves independently of a rotation driving device is provided with a leader. The telescopic member 16 which can be expanded and contracted is fixed to the swivel joint 12 which injects the ground hardening agent from the injection hose 13. The telescopic member 16 is integrated with the guide member 14 through the intermediate support 15 to prevent co-rotation. At the time of carrying, the guide member 14 is arrange | positioned on the reader | leader 4 facing the rotation drive device 8, and the telescopic member 16 and the swivel joint 12 are hold | maintained in a stable state.
[Selection] Figure 4

Description

  The present invention relates to a corotation prevention device for a ground improvement machine. More specifically, the ground improvement machine that prevents the swivel joint that injects the ground improvement agent (ground hardening agent) into the hole excavated by the ground improvement machine from rotating with the rotation of the excavator The present invention relates to a prevention device.

  The ground improvement is performed in order to excavate the ground with a ground improvement machine and inject a ground hardening agent into the excavation hole to strengthen the ground. Basic ground improvement methods are known. An example of the construction method will be described. In the ground improvement machine, first, the excavation bit at the lower end portion of the rotating rotating tube body is excavated to the deep ground. While excavating, the ground constituent object in the excavation hole is agitated with a stirring blade attached to the lower part of the rotating tube body, and a hardener is ejected from the stirring blade and injected to improve the ground. Since the rotating tube body is a hollow body, the curing agent is supplied from above through the inside of the rotating tube body. The curing agent is cement milk or the like supplied from the ground via a hose or the like from the upper part of the ground improvement machine.

This kind of ground improvement machine has been improved and proposed in various details. As an example of the rotation prevention device, Patent Document 1 discloses a configuration in which a rotation prevention member is provided in the screw drive device in order to prevent the injection hose for injecting the improving agent from being swung by rotation of the screw shaft. . Patent document 2 is proposed by the present applicant and discloses a self-propelled ground improvement machine having a stirring device.
Japanese Patent No. 2736008 Japanese Patent Laid-Open No. 11-61802

When the anti-rotation member is provided in the screw (rotating tube body) driving device, the anti-rotation member always operates integrally with the screw driving device. This means that the anti-rotation member is always supported by the screw driving device while holding the screw. When the work is finished and the leader is horizontally tilted and fixed to the main body and the screw is disposed along the leader, the screw driving device portion is positioned at the front portion of the main body, but the rotation preventing member is provided at the rear portion of the screw. In the relationship with the leader, the screw drive device part is in a state where the guide part is held and fixed by the leader, but the anti-rotation member at the rear of the screw is not held by the leader, but is held only by the screw and the anti-rotation member. It becomes composition. This is because the non-rotating member is not restricted and fixed to the leader, so that the swivel joint protrudes long from the screw drive device, and is always in a swinging state, so that the traveling of the ground improvement machine that runs on its own is not stable. means. Depending on the road conditions, a dangerous situation may occur during transportation. For this reason, conventionally, there has been a case where a special fixing process has to be performed particularly in the case of transportation.
The present invention solves such conventional problems and achieves the following object.

  The purpose of the present invention is to stably inject and maintain a ground improvement agent (ground hardener) during work, and to ensure that the swivel joint and tube body can be securely supported by the reader during transportation, ensuring stable and safe driving. It is to provide a co-rotation prevention device for a ground improvement machine that can be used.

  The present invention takes the following means to achieve the object.

The ground rotation improvement device of the present invention 1 includes a main body, a leader provided on the main body, which undulates toward the ground, and a rotating tube that rotates while holding a tool at the tip and allows passage of the ground improvement agent. A body, a first moving body that can be guided in the longitudinal direction of the reader, a rotation driving device that is fixed to the first moving body and that grips and rotates the rotating tube body, and an end of the rotating tube body In a ground improvement machine comprising a swivel joint that supplies a ground improvement agent that is provided so as to be relatively rotatable to the part and is supplied via an injection hose to the rotating tube body,
A telescopic member that engages and supports one end of the swivel joint to prevent rotation of the swivel joint, and is extendable in the longitudinal direction of the reader; and is held so as to be guided in the longitudinal direction of the reader; and The telescopic member is composed of a second moving body to which the other end is fixed.

  The ground rotation machine co-rotation preventing device according to the second aspect of the present invention is the device according to the first aspect, wherein the second moving body is fixed to the guide member, and is fixed to the guide member and held in a longitudinal direction of the reader. It is comprised from the intermediate support body fixed to the said other end of a telescopic member.

  The ground rotation machine co-rotation prevention device according to the present invention 3 is characterized in that, in the present invention 2, a winch for winding and driving a wire that can be locked to the guide member or the intermediate support is provided in the reader. .

  As described above, since the co-rotation prevention device of the ground improvement machine according to the present invention is configured to install the co-rotation prevention member that can move independently of the rotation drive device on the reader, the reader is brought down to a horizontal state. When the ground improvement machine is self-propelled and transported, it moves to the rear of the reader with the co-rotation prevention device guided and held by the reader even if the rotary drive device is installed at the front position of the reader for balancing. Can be made. When the co-rotation preventing device is moved rearward, all the telescopic members are moved rearward, and the telescopic member is contracted with the swivel joint and is held by the reader via the guide member. As a result, the telescopic member and the swivel joint are stably held together with the tube body without shaking during transportation and without fear of damage due to shaking.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the ground improvement machine co-rotation preventing device of the present invention will be described in detail with reference to the drawings.
FIG. 1 to FIG. 3 are overall configuration diagrams of a ground improvement machine 2 to which the corotation prevention device 1 of the present invention is applied. The ground improvement machine 2 has an endless track band 3 and is configured to travel in a self-propelled manner. When the ground improvement machine 2 is transported, the leader 4 is held in a horizontal state on the upper part of the main body and moves. The raising / lowering operation of the leader 4 is performed by the hydraulic cylinder 6 by the operation of the cab 5 while swinging around a fulcrum 9 arranged at the front thereof. The leader 4 is configured to move up and down so as to swing up and down with respect to the ground and to turn together with the cab 5.

  When the reader 4 is erected, the rotation drive device 8 of the tube body 10 movably mounted on the reader 4 can be moved in the vertical direction by a chain drive device (not shown). FIG. 1 shows the posture of the ground improvement machine 2 when it is transported, and the leader 4 is in a state of being in a horizontal state. The leader 4 is provided with a guide portion 4a (see FIGS. 4 and 5) along the length direction. A feed table (first moving body) 7 is guided to be guided by the guide roller 4 movably by the guide roller 4 a, and is movable along the longitudinal direction of the reader 4. A rotation driving device 8 is mounted on and fixed to the feed table 7.

  When the reader 4 is stored, the reader 4 is tilted around a fulcrum 9 at the front of the main body of the ground improvement machine 2, and the rear of the reader 4 is supported by a reader receiver 2a provided on the main body. In this state, the leader 4 is fixed to the main body with a rubber band, a wire or the like, and the ground improvement machine 2 is self-propelled or mounted on a transport vehicle and transported. At the time of this conveyance, the co-rotation prevention device 1 is separated from the rotation drive device 8 and is installed on the reader 4 on the opposite end opposite to the position of the rotation drive device 8 so that the weight of the ground improvement machine 2 is conveyed. Maintain balance.

  When starting the ground improvement work, the leader 4 is erected in the vertical direction with respect to the ground by the operation of the hydraulic cylinder 6 as shown in FIG. A through-hole is formed in the central portion of the rotary drive device 8, and a tube body 10 that is a main shaft for passing a drive shaft and a ground improvement agent during excavation or ground improvement passes therethrough. The tube body 10 is arranged along the longitudinal direction of the leader 4 over almost the entire length at the start of work. A stirring blade 11 (see FIG. 7) or a drilling tool is attached to the lower end of the tube body 10.

  The stirring blade 11 has a blade at its tip and rotates to excavate the ground and stir the ground improver and the excavated soil as the tube body 10 descends. The stirring blade 11 is provided with a stirring device. The rotation driving device 8 has a function of chucking and rotating the tube body 10. The configuration of the rotary drive device 8 is well known, and a detailed description of its structure is omitted. A swivel joint 12 is connected to the upper end of the tube body 10. The swivel joint 12 is capable of rotating relative to the tube body 10 which is the other side that is connected to the swivel joint 12 while being fixed.

  The ground improver, that is, the ground hardening agent such as cement milk, which is pressurized and sent from the tank on the ground via the injection hose 13 is guided to the swivel joint 12. The ground hardening agent is injected into the tube body 10 that rotates from above via the swivel joint 12. The injected ground hardening agent is poured into the ground from the stirring blade 11 at the lower end of the tube body 10 and stirred to strengthen the ground. If there is no other support for the swivel joint 12, there is a possibility that the swivel joint 12 may be rotated due to the rotation of the tube body 10. In the case of the present invention, the swivel joint 12 is prevented from being rotated. FIG. 3 shows a state in which the co-rotation prevention device 1 is moved downward and is brought into contact with the upper end of the rotary drive device 8. When the co-rotation prevention device 1 reaches the lower part, the telescopic member 16 of the co-rotation prevention device 1 is in a state of extending to the maximum.

  Next, the co-rotation preventing device 1 will be described in detail with reference to FIGS. A guide member 14 that can move on the guide portion 4 a of the reader 4 is provided. The guide member 14 is provided so as to be movable independently of the feed table 7 that moves while being guided by the reader 4. The guide member 14 is movable in the vertical direction (in a state where the reader 4 is erected) on the upper part of the feed table 7, and can be moved by holding the guide portion 4 a of the reader 4 by the guide roller 14 a in the same manner as the feed table 7. It has become.

  When the guide member 14 moves downward, the upper surface of the feed table 7 can be contacted. FIG. 4 shows a state where the rotary drive device 8 and the feed table 7 are in contact with each other. One end of the intermediate support 15 is fixed to the mounting surface of the guide member 14 with a bolt across the tube body 10. The intermediate support 15 straddles the tube body 10 in a frame configuration. The guide member 14 and the intermediate support 15 constitute a second moving body. On the other hand, a telescopic member 16 is provided in the swivel joint 12.

  The telescopic member 16 has a structure in which a lever body 16a supports the swivel joint 12 by preventing rotation, and a plurality of cylindrical bodies are attached to the lever body 16a. This is a so-called telescopic structure. In the present embodiment, the cylindrical body portion 16 b having the smallest diameter of the telescopic member 16 is fixed to a lever body 16 a that is located at the upper portion and is fixed to the swivel joint 12. On the other hand, the cylindrical body portion 16c having the maximum diameter hangs down and is positioned below, and is fixed to the intermediate support 15 with bolts. Accordingly, the swivel joint 12 is prevented from being twisted by the telescopic member 16, the intermediate support 15 and the guide member 14.

  When the tube body 10 is not excavated, the rotation and movement are stopped, and the swivel joint 12 is also stopped. The guide member 14 can move independently along the longitudinal direction of the reader 4 with the movement of the cylindrical body portion 16 b having the smallest diameter of the telescopic member 16. A hook 17 is provided on the upper surface of the intermediate support 15 so that the tip of the wire 18 can be connected. On the other hand, a winch 19 is arranged and fixed at the middle part of the back surface of the reader 4 so that the wire 18 can be taken up.

The wire 18 of the winch 19 can be connected by being guided by the hook 17 of the intermediate support 15 via the pulley 20 provided at the tip of the leader 4. When the intermediate support 15 and the guide member 14 are raised, when the wire 18 is connected to the hook 17 and the winch 19 is operated, the wire 18 is wound up and the intermediate support 15 and the guide member 14 are moved in the longitudinal direction of the reader 4. Can be raised along.
Next, the usage method of the corotation prevention apparatus 1 of the ground improvement machine of this invention is demonstrated. 6 to 9 show the steps of the ground improvement work of the ground improvement machine 2. FIG. 6 corresponds to the state shown in FIG. 2 and means a preparation state for starting excavation. In this state, the co-rotation prevention device 1 shows a state where it has moved to the upper end of the tube body 10. This shows a state immediately after the leader 4 is erected vertically from the ground state as described above.

  Next, FIG. 7 shows a state in which the co-rotation preventing device 1 is lowered, lifted together with the rotary drive device 8 after reaching the lowered end, and fixed to the upper portion of the tube body 10. The state where the stirring blade 11 is attached to the lower end of the tube body 10 is shown. Although details are not shown, the leader 4 is lifted slightly upward and the stirring blade 11 is attached to the lower part of the tube body 10. If the winch 19 performs control to follow the operation of the intermediate support 15, the wire 18 may be always attached to the hook 17, but the winch is only used when the intermediate support 15 and the guide member 14 are raised alone. If 19 is operated, the structure is simplified. Although the removed wire 18 is not shown, it may be configured to be temporarily fixed to the reader 4 or the main body.

  When the guide member 14 is lowered and is in contact with the feed table 7 of the rotary drive device 8, the guide member 14 is also raised by the raising operation of the rotary drive device 8. In FIG. 7, the position of the tube body 10 is moved slightly upward from the ground, the stirring blade 11 is attached to the lower part, and the rotation drive device 8 is further moved to the rising end so that the upper portion of the tube body 10 is moved to the rotation drive device 8. The state of holding and fixing is shown by. As a matter of course, the guide member 14 is also raised as described above. At this time, the cylindrical portion 16c having the maximum diameter of the telescopic member 16 rises integrally with the intermediate support 15, so that the telescopic member 16 is in the most contracted state.

  In this state, the tube body 10 is gripped and rotated by the rotation driving device 8 and pushed into the ground. In the process of this pushing operation, the ground hardener is supplied from the injection hose 13 through the swivel joint 12 from the upper end portion of the tube body 10 and is injected into the ground from the stirring blade 11 at the lower end of the tube body 10. Along with this injection, the agitation blade 11 mixes and agitate the soil and the ground hardener. In this way, the tube body 10 is gradually lowered, and the rotation driving device 8 moves to the lower end of the reader 4.

  A state in which the tube body 10 has reached the moving lower end is shown in FIG. If the required ground improvement depth is within the moving range of the length of the tube body 10, the ground improvement work is completed, and the tube body 10 and the stirring blade 11 may be pulled up by the reverse operation described above. The ground improvement may be performed by moving from the deep part of the ground toward the ground surface. When these ground improvement operations are completed, the reader 4 is stored and transported. At the time of transport, the leader 4 is brought down and brought into a horizontal state as shown in FIG. In this case, the co-rotation prevention device 1 including the guide member 14 and the intermediate support 15 is moved and fixed to the distal end portion of the reader 4 facing the rotation drive device 8.

  In the case of the present invention, the guide member 14 is regulated and fixed by the reader 4. In the horizontal state, the co-rotation prevention device 1 is independently installed at the position of the reader 4 on the opposite side facing the rotation drive device 8 with the main body as a boundary. This means that the guide member 14 is regulated by the reader 4 and the swivel joint 12 can be stably held. For example, in the configuration shown in Patent Document 1 described above, the swivel joint remains supported by the rotary drive device at the tip of a rotation-preventing member that is elongated with respect to the rotary drive device. It becomes. This is extremely unstable due to vibration caused by vibration during movement. In the case of the present invention, such an unstable state is eliminated by the guide member 14 being held by the reader 4. In other words, the center of gravity position is stable and the installation is stable and balanced. Thus, when this invention is applied, the stable driving | running | working at the time of conveyance will be attained.

  If there is no height restriction, excavation with a long tube body 21 exceeding the length of the leader can be performed as in the prior art. FIG. 9 shows a case where the tube body 21 is applied to a long tube configuration, and the tube body 21 is approximately twice as long as the above-described embodiment. For this reason, the tip of the tube body 21 is configured to protrude upward from the upper portion of the reader 4. In the case of this example, the co-rotation prevention device 1 moves up and down together with the rotation drive device 8, and the rotation drive device 8 first grips and rotates the intermediate portion of the tube body 21.

  After excavation, the gripping state of the tube body 21 is canceled, and the rotation driving device 8 moves upward and is positioned at the upper end of the tube body 21 to grip and rotate the tube body 21 again. In this way, deep excavation is possible by re-excavation. The rotation drive device 8 is guided on the reader 4 by a drive device (not shown) and moves in the vertical direction. Also in this embodiment, the intermediate support 15 and the rotation drive device 8 are contacted and connected together, or It is possible to raise the intermediate support 15 and the rotary drive device independently and separately. Although various embodiments have been described above, it is needless to say that the present invention is not limited to this embodiment.

FIG. 1 is an overall configuration diagram of a ground improvement machine to which the ground improvement machine co-rotation prevention device of the present invention is applied, and shows a state during transportation in which a leader falls horizontally. FIG. 2 is an overall configuration diagram of a ground improvement machine to which the ground improvement machine co-rotation prevention device of the present invention is applied, and shows a state immediately after the leader is erected from the state during transportation. FIG. 3 is an overall configuration diagram of a ground improvement machine to which the ground improvement machine of the ground improvement machine according to the present invention is applied, and shows a state in which the leader is erected and the common rotation prevention apparatus is positioned below the tube body. FIG. 4 is a front view of the co-rotation prevention device. FIG. 5 is a plan view of the co-rotation preventing device as viewed from the X direction in FIG. FIG. 6 is an explanatory view showing the ground improvement process, and shows a preparation state for excavation. FIG. 7 is an explanatory view showing the ground improvement process, and shows the excavation start state. FIG. 8 is an explanatory view showing the ground improvement process and shows a state where excavation is completed. FIG. 9 is an explanatory view showing an excavation form in which the corotation prevention device of the ground improvement machine of the present invention is applied to a long tube body configuration.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Co-rotation prevention apparatus 2 ... Ground improvement machine 4 ... Reader 7 ... Feed table (1st moving body)
DESCRIPTION OF SYMBOLS 8 ... Rotary drive device 10 ... Tube body 11 ... Stirring blade 12 ... Swivel joint 13 ... Injection hose 14 ... Guide member 15 ... Intermediate support body 16 ... Telescopic member 17 ... Hook 18 ... Wire 19 ... Winch

Claims (3)

A main body, a leader (4) that is provided on the main body and undulates toward the ground, a rotating tube body (10, 21) that holds a tool at the tip and rotates to allow the passage of a ground improver, and the leader ( 4) a first moving body (7) held so as to be capable of guiding in the longitudinal direction, and a rotation driving device fixed to the first moving body (7) and gripping and rotating the rotating tube bodies (10, 21). (8) and a ground improver which is rotatably provided at the end of the rotating tube body (10, 21) and is supplied via an injection hose (13) to the rotating tube body (10, 21). In the ground improvement machine (2) consisting of the swivel joint (12)
A telescopic member (16) that engages and supports one end of the swivel joint (12) in order to prevent rotation of the swivel joint (12) and is extendable in the longitudinal direction of the leader (4);
The ground improvement machine is configured to prevent co-rotation of the ground improvement machine, comprising: a second moving body that is held so as to be capable of being guided in the longitudinal direction of the leader (4) and the other end of the telescopic member (16) is fixed. apparatus. In the corotation prevention apparatus of the ground improvement machine described in claim 1,
The second moving body is
A guide member (14) held so as to be capable of guiding in the longitudinal direction of the reader (4);
An intermediate support (15) fixed to the guide member (14) and fixed to the other end of the telescopic member (16). In the corotation prevention apparatus of the ground improvement machine described in claim 2,
A winch (19) for winding and driving a wire (18) that can be locked to the guide member (14) or the intermediate support (15) is provided in the leader (4). Co-rotation prevention device.

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