JP4166126B2 - Drain material placement machine - Google Patents

Description

  The present invention relates to a drain material placing machine used for ground improvement work in which drain material is embedded in soft ground, and moisture in the ground is sucked up to the ground by a capillary phenomenon due to the drain material. The present invention relates to a mandrel press-fitting device for press-fitting a mandrel into the ground and withdrawing it.

  As a conventional mandrel press-fitting device, a mandrel is pressed into the ground or pulled out by sandwiching a mandrel between a pair of rollers and rotating the roller with a motor. As this type of conventional mandrel press-fitting device, as described in Patent Document 1, two sets of upper and lower press-fitting rollers with drive motors are provided, and each roller can approach and separate from a pair of counterpart rollers. And a spring-equipped shock absorbing mechanism is disclosed.

  Further, for example, Patent Documents 2 and 3 disclose those including an extendable mandrel in which inner and outer pipes are slidably fitted along a leader attached to a self-propelled vehicle.

JP 2000-297425 A JP 54-38609 A JP-A-60-19813

  In recent years, in order to prevent ground subsidence, for example, there is an increasing demand for improvement of soft ground over a depth as deep as 50 m. In order to meet such a demand, a self-propelled vehicle having a tower of such a height If the drain material placing machine is configured by the above, it is necessary to prepare a large-sized self-propelled vehicle because the tower is high, and it is necessary to prepare a large self-propelled vehicle. There is.

  Therefore, as described in Patent Documents 2 and 3, it is conceivable to use a low tower as a mandrel by using a telescopic type with multiple tubes. Using such a telescopic mandrel, it is possible to bury the mandrel and the drain material accommodated in the mandrel while stretching the mandrel, and embed it in the ground. A low one (when a double pipe is used for the mandrel, a height slightly higher than half the depth of the drain material embedded) can be used.

  In this way, a drain material placement machine that enables low head placement by the telescopic mandrel is configured. As described in Patent Document 1, the roller is pressed against the mandrel by a spring, and the mandrel is grounded by rotating the roller. When pushed in, the pressing force of the roller against the tube is different between the state where the roller is pressed against the small size tube and the state where the roller is pressed against the large size tube, making it difficult to obtain an appropriate roller pressing force. For this reason, when the roller is in contact with a small pipe, the pressing force is small and slips easily on a relatively hard ground, and conversely, when the roller is in contact with a large pipe, the pressing force is large and the mandrel is easily deformed. There is a problem of becoming.

  On the other hand, as described in Patent Documents 2 and 3, in the drain material placing machine configured to move the telescopic mandrel up and down along the leader, there is a problem that the weight of the leader increases and the machine becomes large. .

  In view of the above-described problems, the present invention provides a drain material placing machine that can push the telescopic mandrel with a roller with an appropriate pushing force and can avoid an increase in the size of the machine. Objective.

(1) The drain material placing machine of the present invention is
In the drain member striking setting machine for press-fitting a drain member engaged with the mandrel into the ground by press-fitting the mandrel I by the mandrel indentation device mounted on a self-propelled vehicle,
Facing the roller between the pair is the same height, and upper and lower two sets of press-fitting rollers being driven by a motor provided corresponding to each of the roller feeding the mandrel into the ground,
A plurality of bracket rotatably supported so as to be movable in a press-fitting roller side facing the press-fitting rollers respectively,
The rod side the bracket, the bottom side is attached to the tower installation portion of the drain member hitting set machine, a plurality of hydraulic cylinders for pressing the press-fitting roller side facing the press-fitting rollers respectively,
A plurality of check valves respectively provided between a discharge pipe of a hydraulic pump and pipes connected to bottom chambers of the plurality of hydraulic cylinders;
A plurality of accumulators provided respectively downstream of the plurality of check valves;
A plurality of relief valves respectively provided on the upstream side of the plurality of check valves,
The plurality of press-fitting rollers are configured to follow a change in diameter accompanying press-fitting of the multiple telescopic mandrels while keeping the pressing force of the plurality of press-fitting rollers constant .

( 2 ) Moreover, the drain material placing machine of the present invention is characterized in that a chuck device is provided above the mandrel press-fitting device mounting portion in the self-propelled vehicle so as to grip the mandrel and prevent its dropping. To do.

( 3 ) The drain material placing machine of the present invention is
The chuck device is provided on the self-propelled vehicle so as to be movable up and down by a vertical drive device that also serves as a mandrel pushing device.

( 4 ) The drain material placing machine of the present invention is
Whether the mandrel couples adjacent tubes so that they cannot move relative to each other by rotating the tube adjacent to the outside with the inner tube buried in the ground, among the tubes adjacent to the inside and outside. Or / and having a configuration for uncoupling,
The self-propelled vehicle is coupled with the adjacent pipes so as not to move up and down by gripping and rotating the pipes adjacent to the outside of the pipes embedded in the mandrel. And a turning device for releasing the connection.

( 5 ) The drain material placing machine of the present invention is
The rotating device is provided in the chuck device.

( 6 ) The drain material placing machine of the present invention is
The mandrel is moved up and down relative to each other by a lock member that is inserted into a hole provided in the tube adjacent to the outside with the inner tube embedded in the ground, among the tubes adjacent to the inside and outside. It has the structure which couple | bonds together impossible.

( 7 ) Further, in the drain material placing machine according to the present invention, the mandrel is inserted by a wedge inserted between a tube outside the lower end of the tube adjacent to the outside and an inner tube among the tubes adjacent inside and outside. It has a configuration in which both are coupled so as not to move up and down relative to each other.

According to the present invention, the pushing force by the roller of the telescopic mandrel is applied by the hydraulic cylinder, and the hydraulic pressure supplied to the hydraulic cylinder is kept constant by the accumulator and the relief valve. regardless of changes in the size (diameter), may act always appropriate pressing force to the mandrel, proper pushing force, it is possible to work in lifting force. In addition, the tower-type drain material placement machine that does not have a leader has made it possible to realize a telescopic mandrel, so a drain material placement machine that can bury drain material deeply without increasing the size of the machine. realizable.

In addition, the pressing force of the press-fitting roller against the mandrel is kept constant by the relief valve and the accumulator regardless of the change in diameter due to the press-fitting of the mandrel . A sudden change in the pressing force of the roller on the mandrel can be prevented, and a reduction in the pressing force and an excessive pressing force on the mandrel can be prevented.

  FIG. 1 is a side view showing an embodiment of a drain material placing machine according to the present invention, and FIG. 2 is a side view of the mandrel press-fitting device. In FIG. 1, reference numeral 1 denotes a crawler type traveling body, 2 denotes a vehicle body that is installed on the traveling body 1 via a turning device 3, 4 denotes a tower installation portion that protrudes forward from the vehicle body 2, and 5 denotes a tower installation portion 4. A tower made of a lattice boom, for example, 6 is installed on the tower installation unit 4, and a mandrel press-fitting device 7 is installed on the tower installation unit 4. A mandrel chuck device is installed on the tower installation unit 4. The mandrel 9 is configured to be extendable by an outer tube 9a and an inner tube 9b that is slidably fitted inside the mandrel 9a.

  As shown in FIG. 2, the mandrel press-fitting device 6 of the present example includes four press-fitting rollers 10 at the upper part (two pieces) and at the lower stage (two pieces), each having its own speed reducer-equipped hydraulic motor. It is set as the structure rotated by the drive motor 11 which consists of forward and reverse. Further, in this example, the unit is formed as a unit for facilitating the attachment / detachment for the maintenance inspection including the replacement of the roller 10 and the like and the drive motor 11 and the like.

  That is, it is composed of upper roller units 6a and 6b and lower roller units 6c and 6d. Each of the roller units 6 a to 6 d includes a bracket 12, a roller 10 attached to each bracket 12, and a roller driving motor 11 provided independently corresponding to each roller 10.

  On the other hand, roller unit mounting frames 13 and 14 are detachably attached to the tower installation portion 4 by pins 15. Each of the roller units 6a to 6d is configured so that each bracket 12 is attached to the mounting frame 13 or 14 by a single pin 16 so that each roller 10 can be moved close to and away from the opposite roller 10 facing at the same height. It can be attached vertically and rotatably.

Reference numerals 17a to 17d denote hydraulic cylinders for pressing the rollers 10 of the respective roller units 6a to 6d against the mandrel 9 to obtain pushing force and pulling force to the mandrel 9 due to the rotational force of the motor 11. Is connected to the bracket 19 attached to the mounting frame 13 or 14 provided on the tower installation portion 4 side, and the rod side of the hydraulic cylinder is connected to the bracket 12 of each of the roller units 6a to 6d.

  FIG. 3 shows a hydraulic circuit for allowing the hydraulic cylinders 17 a to 17 d to exert a predetermined pressing force on the mandrel 9. Reference numeral 21 denotes a hydraulic pump mounted on the vehicle body 2. Pipe lines 23 connected to the bottom chambers of the hydraulic cylinders 17a to 17d are connected to the discharge pipe lines 24 of the hydraulic pump 21 via check valves 25, and accumulators 26 are connected to the respective pipe lines 23. Corresponding to the pipelines 23 connected to the respective hydraulic cylinders 17a to 17d, relief valves 27 are provided respectively connected to the discharge pipelines 24. When the hydraulic pressure in the pipelines 23 exceeds the set pressure of the relief valves 27, In order to prevent the hydraulic pressure to the pipeline 23 from exceeding a predetermined value, the relief valve 27 is opened when the pressure (relief pressure) of the pipeline 23 is exceeded, and the hydraulic cylinders 17a to 17d are almost constant by the accumulator 26. The hydraulic pressure is configured to act. Note that the relief valve 27 may change the relief pressure in accordance with the hardness of the ground by making the relief pressure variable.

  4 and 5 are a side view and a plan view of the chuck device 7, respectively. The chuck device 7 is provided with a base frame 30 that can be moved up and down along the guide rod 28 by expansion and contraction of a hydraulic cylinder 29. A turntable 32 is rotatably installed on the base frame 30 via a bearing 31. On the turntable 32, a hydraulic motor 33 for rotating the hydraulic motor 33 is installed. Its output gear 34 meshes with an internal gear 35 fixed to the base frame 30, and the turntable 32 is operated by the operation of the hydraulic motor 33. Rotate.

  On the turntable 32, arms 37 are respectively mounted around two longitudinal axes 36, a chuck hydraulic cylinder 39 is mounted between one end of these arms 37, 37, and the other end is a turntable. A gripping tool 40 for gripping the outer cylinder 9a of the mandrel 9 passing through the central hole 32a of the 32 is attached. The reason why the gripping device is arranged on the turntable 32 in this manner is to perform the coupling between the outer tube 9a and the inner tube 9b of the mandrel 9 to be described later and the release of the coupling.

  6 and 7 are views showing an example of a structure for coupling the outer tube 9a and the inner tube 9b so as not to move relative to each other. As shown in FIG. 6, a ring-shaped packing 42 and a lid 43 are attached to the lower end of the outer tube 9 a to prevent the intrusion of muddy water into the muddy water. It is fixed. The locking tool 44 has a substantially J-shaped locking groove 45. On the other hand, the inner tube 9b has a flange 46 at the upper end and a locking projection 47 at the lower part.

  In this drain material placing machine, a telescopic mandrel 9 composed of an outer tube 9a and an inner tube 9b is inserted into a tower 5 so as to be movable up and down along a guide, and is attached to a side of the tower installation portion 4 ( A belt-like drain material 49 (see FIGS. 2B and 2C) wound around a mandrel is inserted from the top of the tower 5 into the mandrel, and the tip of the drain material 10 is the mandrel 9 (inner tube 9b). ), The outer tube 9a of the mandrel 9 is gripped between the gripping tools 40, 40 of the chuck device 7, and the inner tube 9b is press-fitted into the soft ground by the mandrel press-fitting device 6, so that the drain 49 Press into the soft ground.

  Subsequently, when the inner tube 9b is pushed in until the top of the inner tube 9b reaches the lower end of the outer tube 9a, the outer tube 9a is coupled to the inner tube 9b. This coupling is shown in FIGS. 7A and 7B by pulling up the outer cylinder 9a as shown by an arrow Y1 in FIG. 6B by contracting the hydraulic cylinder 29 of the chuck device 7 from the state of FIG. Thus, the locking projection 47 of the inner tube 9 b is fitted to the bottom of the locking groove 45.

  Next, the hydraulic motor 33 is actuated to rotate the outer tube 9a as shown by an arrow X in FIG. 7 (B) to move the locking projection 47 horizontally as shown by a two-dot chain line, and to move the locking groove. It is located in the back of 45. Next, the extension of the hydraulic cylinder 29 lowers the outer tube 9a as shown by an arrow Y2 in FIG. 7B, and locks the locking projection 47 as shown in FIGS. 7C and 7D. It is engaged with the upper part at the back of the groove 45 to be in a coupled state.

  In this state, when the gripping of the outer tube 9a by the chuck device 7 is released and the lowering of the mandrel 9 is resumed by the rotation of the roller 10, the mandrel press-fitting device 6 moves the inner tube 9b from the state where only the inner tube 9b is pushed down. Simultaneously with the lower roller 10, the outer tube 9 a is pushed down with the upper roller 10, and then only the outer tube 9 a is pushed down with the upper and lower rollers 10, thereby the inner tube 9 b coupled to the outer tube 9 a together with the outer tube 9 a. Also descends.

  When the top of the outer tube 9a is pushed by the rotation of the roller 10 until it reaches the lower end of the tower 5, the worker cuts the portion of the drain material 49 coming out from the top of the mandrel 9, and the mandrel press-fitting device 6 is The mandrel 9 is pulled up by operating in the pulling direction of the mandrel 9.

  In this state, the inner tube 9b is pulled up together with the outer tube 9a in a state where the locking projection 47 is locked to the bottom of the locking groove 45 as shown by a two-dot chain line in FIG. At the time of this lifting, the drain material 49 remains in the ground, and the drain material 49 suspended in the tower 5 is inserted into the mandrel 9. Then, when the outer tube 9a is pulled up to the top, the roller 10 is stopped, and the outer tube 9a is moved by the chuck device 7 from the state where the locking projection 47 is in the position shown by the two-dot chain line in FIG. In this state, the outer tube 9a is gripped and the outer tube 9a is rotated in the anti-X direction of FIG. 7B by the operation of the hydraulic motor 33, so that the locking projection 47 is relatively moved from the two-dot chain line position to the solid line position. Then, the roller 10 is operated to raise the mandrel 9. At this time, only the inner tube 9 b is pulled up by the roller 10.

  When the lower end of the drain material 49 is exposed from the lower end of the inner tube 9b by such a pulling operation, the lower end of the drain material 49 is engaged with the engagement groove 45 at the lower end of the inner tube 9b, and the mandrel press-fitting device 6 The drain material 49 is buried by repeating the pressing operation of 9 and press-fitting the mandrel 9 into the ground again.

  As described above, if the mandrel is configured to be telescopic by combining a plurality of pipes, the height of the tower 5 is about half the construction depth of the drain material 49, and the construction depth is deep. You can eliminate the fear of collapse due to the tower being too high. Further, even when gripping pipes of different sizes, the pressing force of the roller 10 against the mandrel 9 is hardly changed, and the mandrel 9 can be pressed with an appropriate pressing force by the low et al. For this reason, it is possible to avoid slippage due to the pressing force of the roller 10 being too low and deformation of the mandrel 9 due to excessive pressing force.

  In the present embodiment, the outer tube 9a and the inner tube 9b are coupled and released by moving the upper tube 9a up and down and rotating, so that the operator can perform the coupling and release. As a result, it is possible to save the labor of inserting and removing the pins by the workers as described in Patent Documents 1 and 2 and to save labor and improve efficiency.

  Further, by providing two pairs of upper and lower rollers in pairs, the surface pressure of each roller 10 can be lowered and the life of the rollers can be extended compared to the case where only one pair of rollers is provided. .

  The hydraulic cylinder 29 provided in the chuck device 7 can also be used as a means for applying a pushing force when pushing the mandrel 9 into a relatively hard ground, and one unit can have two functions. it can.

  Note that the rotation mechanism for coupling and releasing the outer tube 9a and the inner tube 9b may be configured by a device different from the chuck device 7, but the chuck device 7 itself is configured to rotate. Thus, the device configuration is made compact. As a means for rotating, a hydraulic cylinder can be used instead of the hydraulic motor 33.

  FIG. 8 shows another example of a device for coupling and releasing the outer tube 9a and the inner tube 9b according to the present invention. In this example, a locking portion 51 that protrudes in a radial direction from a part of the outer periphery of the inner tube 9b is provided at the top of the inner tube 9b, while the locking portion 51 is received at the lower end of the outer tube 9a. The ring 48 is fixed, and a locking receiving portion 50 having a gap through which the locking portion 51 can pass is fixed on the ring 48. A stopper 52 is provided on a part of the ring 48.

  In this example, as shown in FIG. 8 (E), after the locking portion 51 of the inner tube 9b passes between the locking receiving portions 50 and 50, the outer portion is moved as shown in FIGS. 8 (F) and (G). The tube 9a is rotated by the operation of the motor 33 so that the locking portion 51 is hidden under the locking receiving portion 50, thereby coupling the outer tube 9a and the inner tube 9b so as not to move up and down. When the engagement is released, the outer tube 9a is rotated in the reverse direction so that the locking portion 51 is brought into contact with the stopper 52, and the inner tube 9b is pulled out by the roller 10 in this state. Is. Also in this example, the outer tube 9a and the inner tube 9b can be coupled and released by remote operation by the operation of the operator.

  FIG. 9 shows another example of a device for coupling and releasing the outer tube 9a and the inner tube 9b according to the present invention. In this example, the ring 48 is fixed to the lower portion of the outer tube 9a, and the ring 48 is rotatably supported around the shaft 54 and pressed against the outer peripheral surface of the inner tube 9b by a spring 55. A movable piece 53 is provided on the top of the inner tube 9b. On the other hand, a locking portion 56 comprising a recess or a hole for engaging the movable piece 53 and a retaining protrusion protruding outward from the recovery surface are fixed. 57.

  In this example, as shown in FIGS. 9A and 9B, when the top of the inner tube 9b is above the movable piece 53, the movable piece 53 is pressed against the outer peripheral surface of the inner tube 9b by the force of the spring 55. When the inner tube 9b is lowered from this state and the locking portion 56 is lower than the movable piece 53, the movable piece 53 is pushed inward by the force of the spring 55 and locked to the locking portion 56. . For this reason, the upward movement of the inner tube 9b relative to the outer tube 9a is prevented, and the two are coupled. The release of the coupling is performed by rotating the outer tube 9a in the direction of arrow R in FIG. In this example, since the coupling is automatically performed, it is only necessary to release the coupling, and there is an advantage that the number of operations can be reduced by half and the efficiency can be improved.

  FIG. 10 is a side view showing another embodiment of the mandrel press-fitting device according to the present invention. In the present embodiment, brackets 60 are attached to the mounting frames 13 and 14 attached to the lower part of the tower installation portion 4 so as to be swingable up and down around the pins 59, and the hydraulic motors 11 are attached to the upper and lower sides of the brackets 60, respectively. A roller 10 is mounted, and hydraulic cylinders 17a to 17d to which the predetermined hydraulic pressure is applied are mounted between the mounting frames 13 and 14 and the bracket 60.

  In the present embodiment, the pressing forces of the four rollers 10 against the mandrel 9 are the same, so that the rollers 10 can be pressed with a more appropriate pressing force even when pressing multiple tubes of different sizes. Further, when the gripping of the roller 10 is changed from the inner tube 9b to the outer tube 9a, or when the pressing force by the roller 10 is changed when the outer tube 9a is changed to the inner tube 9b, the rotation of the bracket 60 is relieved. It is possible to prevent a reduction in the pressing force and an excessive pressing force on the mandrel 9.

FIG. 11 is a side view showing a reference example of the mandrel press-fitting device according to the present invention. In the present embodiment, pressing devices 61a to 61d having springs are provided instead of the hydraulic cylinders 17a to 17d in FIG. Also in this reference example , when the gripping of the roller 10 is changed from the inner tube 9b to the outer tube 9a or when the outer tube 9a is changed to the inner tube 9b, the sudden change in the pressing force by the roller 10 is alleviated by the rotation of the bracket 60. Therefore, it is possible to prevent the pressing force from being lowered and the excessive pressing force from acting on the mandrel 9.

  FIG. 12 shows another example of a device for coupling and releasing the coupling between the outer tube 9a and the inner tube 9b. A top 63 as a locking member for locking is inserted into a hole 62 provided in the outer tube 9a. The inner pipe 9b is mounted so as to protrude and retract, and flanges 64 and 65 are provided at the top of the inner pipe 9b with a vertical interval, and a pressing ring 69 for pushing the frame 63 inward is provided on the outer pipe 9a. The tube 9a is slidably fitted. Reference numeral 66 denotes a spring for automatically releasing the locking by pressing the top 63 outward, and 67 is a stopper for preventing the top 63 from coming off.

  In this apparatus, as shown in FIG. 12 (A), in the state where the inner tube 9b is lowered to the lower end of the outer tube 9a, the top 63 is pushed up against the spring 66 by pushing up the pressing ring 69. 12 (B), and the inner tube 9b is coupled to the outer tube 9a. If the pressing ring 69 is pushed down as shown in FIG. 12A, the top 63 can be pushed out by the force of the spring 66, and the coupling can be released.

  FIG. 13 shows another example of an apparatus for coupling and releasing the coupling between the outer tube 9a and the inner tube 9b. A cylindrical body 71 having a tapered hole is fixed inside the lower end of the outer tube 9a, and a half-shaped wedge is formed. 72, 73 are screwed into a screw hole 74 provided at the lower end of the outer tube 9a with a bolt 75 inserted through the wedges 72, 73, and the wedges 72, 73 are press-fitted between the cylinder 71 and the inner tube 9b. The outer tube 9a and the inner tube 9b are coupled, and the coupling is released by loosening the bolt 75.

  FIG. 14 shows another example of a device for coupling and releasing the coupling between the outer tube 9a and the inner tube 9b. When the inner tube 9b is lowered to the lowest position, the flanges 64, 65 at the top of the inner tube 9b are shown. Two pin holes 76 are provided in the tangential direction at the position of the inner tube 9b corresponding to the intermediate tube 9b, and a pin 77 is inserted into each pin hole 76 so that the outer tube 9a and the inner tube 9b are coupled. It is composed.

FIG. 15 shows another reference example of the present invention in which only one pair of press-fitting rollers 10 forming the pair shown in FIG. 2 is provided. In this reference example , the hydraulic cylinders 17a and 17b and the chuck device 7 are controlled according to the procedure shown in FIG. That is, the outer tube 9a is held by the gripping tool 40 of the chuck device 7, and the inner tube 9b is buried in the ground together with the drain material 49 by the rotation of the press-fitting roller 10, as shown in FIG. Thus, when the upper end of the inner tube 9b reaches the lower end of the outer tube 9a, the hydraulic cylinders 17a and 17b are contracted to separate the press-fitting rollers 10 and 10 from the inner tube 9b as shown in FIG. Then, both pipes are joined by a device for joining the outer pipe 9a and the inner pipe 9b. Then, the hydraulic cylinder 29 is contracted to lower the outer tube 9 a to a position facing the press-fitting roller 10. Thereafter, as shown in FIG. 16C, the hydraulic cylinders 17a and 17b are extended to press the press-fitting rollers 10 and 10 against the outer tube 9a, and the press-fitting rollers 10 and 10 are driven to rotate together with the inner tube 9b. The outer tube 9a is buried in the ground. Also in this embodiment, the pressure at which the press-fitting rollers 10 and 10 are pressed against the inner tube 9b or the outer tube 9a can be set to the same or close pressure by the relief valve. And can be set to a suitable level.

FIG. 17 shows another reference example of the present invention, in which only one press-fitting roller 10, 10 is provided, and a tapered portion 90 is provided at the lower end portion of the outer tube 9a. In the present embodiment, after the press-fitting rollers 10 and 10 are buried to a depth at which the inner tube 9b should be connected to the outer tube 9a, the press-fitting rollers 10 and 10 are stopped, and the inner tube 9b and the outer tube 9a Are coupled by the coupling means described above. Thereafter, when the rotation of the press-fitting rollers 10 and 10 is resumed, the rollers 10 and 10 are rotated in contact with the taper portion 90, whereby the pushing force is transmitted to the outer tube 9a and the mandrel 9 is buried. This can be done without operating the hydraulic cylinders 17a, 17b.

  When practicing the present invention, multiple tubes of triple tubes or more may be used as mandrels.

It is a side view which shows one Embodiment of the drain material placement machine by this invention. (A) is a side view of a mandrel press-fitting device provided in the drain material placing machine in FIG. 1, and (B) and (C) are cross-sectional views showing a state in which an outer tube and an inner tube are held by rollers, respectively. is there. FIG. 3 is a hydraulic circuit diagram of the mandrel press-fitting device of FIG. 2. It is a side view of the chuck device of this embodiment. FIG. 5 is a plan view of the chuck device of FIG. 4. (A) is the longitudinal cross-sectional view which shows the joint structure of the mandrel of this Embodiment, (B) is the side surface expanded view, (C) is AA sectional drawing of (A). (A), (C) is the longitudinal cross-sectional view which shows the coupling structure of the mandrel of this Embodiment in a different coupling | bonding process, (B), (D) is a side surface expanded view of (A), (C), respectively. (A) is a longitudinal sectional view showing another example of the bonded structure of the mandrel of the present invention, and (B), (C), (D) are cross sections taken along the lines BB, CC, DD of (A), respectively. Figures (E) and (F) are longitudinal sectional views showing the different coupling processes, and (G) is an EE sectional view of (F). (A) is a longitudinal sectional view showing another example of the bonded structure of the mandrel of the present invention, (B) is a sectional view taken along the line FF of (A), (C) is a longitudinal sectional view showing the joined state, (D ) Is a GG sectional view of (C). It is a side view which shows other embodiment of the mandrel press-fitting apparatus of this invention. It is a side view which shows the reference example of the mandrel press-fitting apparatus of this invention. (A), (B) is the longitudinal cross-sectional view which shows the other example of the coupling | bonding structure of the mandrel of this invention in a coupling | bonding cancellation | release state and a coupling | bonding state, respectively. (A), (B) is the longitudinal cross-sectional view which shows the other example of the coupling | bonding structure of the mandrel of this invention in a coupling | bonding cancellation | release state and a coupling | bonding state, respectively. It is a longitudinal cross-sectional view which shows the other example of the coupling structure of the mandrel of this invention. It is a side view which shows the other reference example of this invention. FIG. 16 is an explanatory diagram of the work procedure of FIG. 15. It is a side view which shows the other reference example of this invention.

Explanation of symbols

1: traveling body, 2: vehicle body, 3: turning device, 4: tower installation unit, 5: tower, 6: mandrel press-fitting device, 6a to 6d: roller unit, 7: chuck device, 9: mandrel, 9a: outer tube 9b: inner pipe, 10: roller, 11: motor for driving the roller, 12: bracket, 13, 14: mounting frame, 15, 16: pin, 17a to 17d: hydraulic cylinder, 19: bracket, 21: hydraulic pump, 25: Check valve, 26: Accumulator, 27: Relief valve, 28: Guide rod, 29: Hydraulic cylinder, 30: Base frame, 31: Bearing, 32: Turntable, 33: Hydraulic motor, 34: Output gear, 35: Internal gear, 36: vertical axis, 37: arm, 39: hydraulic cylinder, 40: gripping tool, 42: packing, 43: lid, 44: locking tool, 45: locking groove, 46: hula 47: Locking projection, 48: Ring, 49: Drain material, 50: Locking receiving part, 51: Locking part, 52: Stopper, 53: Moveable piece, 54: Shaft, 55: Spring, 56: Engagement Stop part, 57: Protrusion for retaining, 59: Pin, 60: Bracket, 61a to 61d: Pressing device having spring, 62: Hole, 63: Top, 64, 65: Flange, 66: Stopper, 69: Pressing ring 71: cylinder, 72, 73: wedge, 74: screw hole, 75: bolt, 76: pin hole, 77: pin, 90: taper part

Claims (7)

In the drain member striking setting machine for press-fitting a drain member engaged with the mandrel into the ground by press-fitting the mandrel I by the mandrel indentation device mounted on a self-propelled vehicle,
Facing the roller between the pair is the same height, and upper and lower two sets of press-fitting rollers being driven by a motor provided corresponding to each of the roller feeding the mandrel into the ground,
A plurality of bracket rotatably supported so as to be movable in a press-fitting roller side facing the press-fitting rollers respectively,
The rod side the bracket, the bottom side is attached to the tower installation portion of the drain member hitting set machine, a plurality of hydraulic cylinders for pressing the press-fitting roller side facing the press-fitting rollers respectively,
A plurality of check valves respectively provided between a discharge pipe of a hydraulic pump and pipes connected to bottom chambers of the plurality of hydraulic cylinders;
A plurality of accumulators provided respectively downstream of the plurality of check valves;
A plurality of relief valves respectively provided on the upstream side of the plurality of check valves,
Drain material placement characterized in that the plurality of press-fitting rollers follow a change in diameter accompanying press-fitting of a multiple telescopic mandrel while keeping the pressing force of the plurality of press-fitting rollers constant. machine. In the drain material placing machine according to claim 1 ,
A drain material placing machine characterized in that a chuck device that grips the mandrel and prevents its dropping is provided above the mounting portion of the mandrel press-fitting device in the self-propelled vehicle. In the drain material placing machine according to claim 2 ,
A drain material placing machine, wherein the chuck device is provided on the self-propelled vehicle so as to be movable up and down by a vertical drive device that also serves as a mandrel pushing device. In the drain material placing machine according to any one of claims 1 to 3 ,
The mandrel couples adjacent tubes so that they cannot move up and down by rotating the tube adjacent to the outside with the inner tube buried in the ground, among the tubes adjacent to the inside and outside. Or / and a structure for uncoupling,
The self-propelled vehicle is coupled with the adjacent pipes so as not to move up and down by gripping and rotating the pipes adjacent to the outside of the pipes embedded in the mandrel. A drain material placing machine characterized by comprising a turning device for releasing the connection. In the drain material placing machine according to claim 4 ,
A drain material placing machine, wherein the rotating device is provided in the chuck device. In the drain material placing machine according to any one of claims 1 to 3 ,
The mandrel is adjacent to each other by a lock member that is inserted into a hole provided in a tube adjacent to the outside in a state where the inner tube is buried in the ground and is relatively extended, among the tubes adjacent to the inside and outside. A drain material placing machine characterized in that the pipes are coupled so as not to move relative to each other. In the drain material placing machine according to any one of claims 1 to 3 ,
The mandrel has a configuration in which both of the tubes adjacent to the inside and outside are coupled to each other so as not to move up and down relatively by a wedge inserted between the tube outside the lower end of the tube adjacent to the outside and the tube inside. Drain material placing machine.

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