JP2007291807A - Foundation machine and method for attaching and removing shaft body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation machine and a method for attaching and removing shaft bodies capable of lengthening shaft bodies by addition or their removal at a working place above which obstacles are present and efficiently performing work such as excavation and pile driving. <P>SOLUTION: The foundation machine is provided with a leader 7 mounted to a self-propelled vehicle; an elevating and lowering frame mounted in such a way as to be elevated and lowered along the leader 7; a vertical rotating device 19 mounted to the elevating and lowering frame; and an intermediate-insertion-type rotation driving device 16 mounted to a rotating body of the vertical rotating device 19 and inserted in shaft bodies for excavation or erection inside to dive them to rotate. The rotation driving device 16 is horizontally arranged to insert and remove piles, a screw auger, etc. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, a shaft body made of a pile, a screw auger, a kelly bar or the like is inserted into a cylindrical drive shaft of a penetrating rotary drive device and fixed by a chuck device. The present invention relates to a basic machine for inserting and removing a shaft body.

  In a basic machine such as a pile driver that is generally used, a chuck device is attached to the lower surface of a rotary drive device that is moved up and down along a leader, and a head of an excavator such as a screw auger or a shaft body such as a pile is chucked. It is grasped by the device, the rotary drive device is lowered along the leader, and excavation and pile driving are performed while rotating the shaft body. However, when using low overhead pile driving or excavation under an elevated railway or viaduct or in a tunnel or underground, only a short leader can be used because there is an obstacle at the top. When a basic machine having the above-described structure is used in such a situation, only the short shaft body obtained by subtracting the vertical width of the rotary drive device and the margin necessary for work from the length of the reader is mounted on the rotary drive device. I can't. For this reason, it takes time to add or remove the shaft body, and the work efficiency deteriorates.

  Thus, in order to solve such a problem at a construction site having an obstacle on the upper part, it is necessary to lengthen the shaft body to be used as much as possible and to reduce the number of times the shaft body is attached and detached. For this reason, a penetrating rotary drive device, that is, a type capable of penetrating a shaft body into a cylindrical drive shaft is used (see, for example, Patent Document 1). In a pile driving machine using such a penetrating rotary drive device, a shaft body having a length substantially the same as the length of the leader can be used.

  In such a conventional basic machine, when a shaft body is inserted into a rotary drive device and set or removed, the shaft body is suspended or lifted by a crane on a hollow drive shaft of the rotary drive device and added or removed. Yes.

Japanese Patent Laid-Open No. 9-59981 (FIG. 1)

  As described in Patent Document 1, in a foundation machine having a penetrating type rotary drive device, in order to add and remove shafts such as excavating tools such as screw augers and existing piles, the foundation machine is removed from the construction site. It is necessary to move to a place far away and to hang the shaft body with a crane, to insert and remove the shaft body by lifting, and it takes time to reciprocate between the construction site and the crane installation location. In addition, it is necessary to perform alignment (center alignment) in order to return to the work place and add a new shaft to the existing shaft. For this reason, there exists a problem that work efficiency is bad.

  In view of the above problems, the present invention provides a foundation machine and a shaft body attaching / detaching method capable of efficiently performing operations such as excavation and pile driving, in which a shaft body can be added or removed at a work place having an obstacle at the top. The purpose is to provide.

The basic machine according to claim 1 is a reader attached to a self-propelled vehicle;
An elevating frame attached so as to be movable up and down along the reader;
A vertical turning device attached to the lifting frame;
It is attached to the swivel body of the vertical swivel device, and is provided with a penetrating rotary drive device that is driven to rotate by inserting a shaft body for excavation or erection inside.

The method of attaching and detaching the shaft body according to claim 2 is such that a leader is attached to a self-propelled vehicle, and a penetrating rotary drive device is attached to the leader so as to be able to turn vertically,
After the rotary drive device is turned sideways, a shaft body for excavation or erection is inserted from the horizontal direction or pulled out from the rotary drive device.

The method for attaching and detaching the shaft body according to claim 3 is the method according to claim 2,
After the rotary drive device is turned sideways, when the shaft body is inserted, the shaft body is inserted into the rotary drive device with the rear part in the insertion direction supported by the transport vehicle, and the intermediate portion of the shaft body is rotated. In a state where the shaft body is supported and fixed to the drive device, the shaft body is vertically turned together with the rotation drive device to erect the shaft body.

The shaft body attaching / detaching method according to claim 4 is the method according to claim 2,
When pulling out the shaft body from the rotation drive device, the shaft body is fixed to the rotation drive device with the intermediate portion of the shaft body supported by the rotation drive device, and the shaft body is swung longitudinally together with the rotation drive device. The shaft body is pulled out from the rotary drive device in a state where the shaft body is in the horizontal direction and the front portion in the pulling direction of the shaft body is supported by the conveyance vehicle.

  In the first aspect of the present invention, since the penetrating rotary drive device is attached via the vertical turning device, it is possible to make it horizontal, so that the rotary drive device is turned sideways and the shaft body is inserted into the hollow drive shaft. Can be pulled out or pulled out. For this reason, it is not necessary to move from a construction site for excavation or pile driving at a construction site where there is an obstacle on the top, and the shaft body can be attached and detached efficiently.

  In addition, when the shaft body is added, there is a case where it is not necessary to move the machine. In this case, it is not necessary to align the new shaft body with the existing shaft body. For this reason, the work efficiency when there is an obstacle at the top can be greatly improved.

  In the invention of claim 2, since the shaft-type rotary drive device is turned sideways and the shaft body is inserted into or pulled out of the hollow drive shaft, the excavation and pile driving can be performed at the construction site where there is an obstacle on the top. There is no need to move from the construction site, and the shaft body can be attached and detached efficiently.

  In addition, when the shaft body is added, there is a case where it is not necessary to move the machine. In this case, it is not necessary to align the new shaft body with the existing shaft body. For this reason, the work efficiency when there is an obstacle at the top can be greatly improved.

  According to the third and fourth aspects of the present invention, the shaft body is swung vertically with the intermediate portion of the shaft body supported and fixed by the rotation drive device, so that the shaft body does not contact the upper obstacle or the ground, The shaft body can be easily set or pulled out.

  In addition, when inserting and withdrawing the shaft body, the rear part of the shaft body in the insertion direction and the front part in the withdrawing direction are supported by the transport vehicle, and the intermediate part of the shaft body is supported by the rotary drive device during the vertical turn. The burden on the rotary drive device and the like due to the eccentric load of the shaft body can be reduced, and damage to the device can be prevented.

  FIG. 1 is a side view showing an embodiment of a basic machine of the present invention, and FIG. 2 is a front view thereof. 1 and 2, reference numeral 1 denotes a traveling body, and 2 a revolving body installed on the traveling body 1 via a revolving device 3. On the revolving body 2, a cab 4, a hydraulic pressure source, and a power source are provided. A power unit 5 is installed, and these constitute a self-propelled vehicle. An outrigger 6 is attached to the revolving unit 2 at the rear portion, and a leader 7 is attached by a backstay cylinder 8 so as to be raised and lowered. The leader 7 is provided with a hydraulic cylinder for correcting the right and left inclinations to be in a vertical posture, but is not shown.

  Outriggers 9 are attached to the left and right of the lower portion of the reader 7. Reference numeral 10 denotes an elevating frame. The elevating frame 10 is slidably fitted along a guide pipe 11 provided along the leader 7 as shown in the partial sectional side view of FIG. 3 and the partial sectional plan view of FIG. It has a guide give 12 to be fitted, and is mounted along the leader 7 so as to be movable up and down.

  A drive sprocket 13 driven by a drive motor such as a hydraulic motor for raising and lowering the elevating frame 10 is attached to the lower part of the reader 7. A roller chain 15 is attached to the sprocket 13 and a driven sprocket 14 attached to the top of the leader. The roller chain 15 is connected to the elevating frame 10 with a chain anchor 18. For this reason, the elevating frame 10 can be moved up and down along the reader 7 by rotating the drive sprocket 13 by the drive motor.

  Reference numeral 16 denotes a rotary drive device having a hollow drive shaft 30, and reference numeral 19 denotes a vertical turning device for attaching the rotary drive device 16 to the lifting frame 10 so as to be capable of vertical turning. The vertical turning device 19 includes an inner ring 20 fixed to the elevating frame 10, an outer ring 22 attached to the inner ring 20 via a bearing 21 so as to be turnable, a turning body 23 fixed to the outer ring 22, and the turning body 23. And the output gear 25 which is attached to the drive shaft and meshes with the internal gear 20 a of the inner ring 20.

  As shown in FIGS. 3 and 4 and FIG. 5, which is a longitudinal sectional view, the frame body 16 a of the rotary drive device 16 is fixed to the revolving body 23. A drive motor 27 such as a hydraulic motor for rotating the shaft body 26 (see FIG. 11) is attached to the rotation drive device 16. Reference numeral 30 denotes a cylindrical drive shaft for driving a shaft body, which is rotatably supported by a bearing 29 on the frame body 16 a of the rotation drive device 16. A ring-shaped external gear 31 is provided on the outer periphery of the drive shaft 30. The external gear 31 meshes with output gears 33 of two drive motors 27 such as hydraulic motors installed on the frame 16a. Accordingly, the drive shaft 30 is rotated by operating the drive motor 27.

  A chuck device 35 for fixing the shaft body 26 to the drive shaft 30 is provided below the frame body 16a. In this Embodiment, the example which used the steel pipe pile as the shaft body 26 is shown, and in the case of this steel pipe pile, a drilling tool (not shown) is attached to the lower part of the lowest end thing. As the shaft body 26, a kelly bar for attaching a cylindrical excavating bucket to the lower end, a screw auger, a spindle for attaching an excavating tool to the lower end, or the like can be used. As shown in FIG. 6, the shaft body 26 is provided with a key 36 that is a square protrusion. A plurality of pairs of these keys 36 are provided with a pair of keys provided at two opposing positions on the outer periphery of the shaft body 26 with an interval in the vertical direction. Preferably, as shown in FIGS. 9 to 11, these keys 36 are provided at the middle portion and the upper portion of the shaft body 26.

  In FIGS. 5 and 6, reference numeral 39 denotes a cylindrical sleeve fixed to the lower portion of the drive shaft 30. A flange 40 for fixing to the drive shaft 30 is provided at a lower portion of the sleeve 39, and a bolt insertion hole 41 is provided in the flange 40. As shown in the side view of FIG. 7, the sleeve 39 is fixed to the drive shaft 30 by inserting the bolt 42 into the bolt insertion hole 41 and screwing it into the screw hole provided in the drive shaft 30.

  The sleeve 39 is provided with two longitudinal grooves 43 at 180 degrees apart from each other so that the key 36 of the shaft 26 can be vertically moved over the entire length in the vertical direction (FIGS. 5 and 6). reference). Corresponding to the longitudinal grooves 43 provided at these two locations, the keys 36 are also provided at locations separated by 180 degrees in the circumferential direction of the shaft body 26. Further, a lateral groove 44 into which the key 36 can be movably fitted is provided in a circumferential direction from a middle portion of the longitudinal groove 43 at a depth slightly deeper than the lateral width of the key 36. As shown in FIGS. 4 and 5, a longitudinal groove 30 a that is continuous with the longitudinal groove 43 of the sleeve 39 is formed on the inner surface of the drive shaft 30 so that the shaft body 26 can be inserted and pulled out.

  FIG. 8 is a bottom cross-sectional view showing a mounting structure of a plug body 46 to be inserted at the intersection of the vertical groove 43 and the horizontal groove 44. A guide plate 47 is fixed to the sleeve 39 with an interval substantially equal to the width of the vertical groove 43. A plug 46 is slidably fitted between the guide plates 47 in the radial direction of the sleeve 39.

  FIG. 5 shows the attachment structure of the plug 46. The stopper 46 has a recess 46a on the lower surface thereof, and one end of a dog-shaped drive body 50 attached to the guide plate 47 so as to be rotatable about a shaft 49 is engaged with the recess 46a. Reference numeral 51 denotes a ring having a U-shaped cross section in which the other end of the driving body 50 is slidably received and engaged, and this ring 51 is provided on the frame body 16a of the rotary drive device 16 with a plurality of hydraulic cylinders and the like. The vertical drive device 52 is attached so as to be movable up and down. Reference numeral 53 denotes a spring mounting portion provided on the flange 40 of the sleeve 39. The spring mounting portion 53 is provided with a spring 54 that presses the plug 46 toward the intersection between the vertical groove 43 and the horizontal groove 44.

  The right side of FIG. 5 and FIG. 8 show a state in which the plug body 46 is inserted at the intersection of the vertical groove 43 and the horizontal groove 44 (locked state), and the plug body 46 is connected to the vertical groove 43 and the horizontal groove 44 on the left side of FIG. The state extracted from the intersection (lock release state) is shown. In some cases, the chuck device may be provided on the top of the rotary drive device 16.

  In FIG. 1, 55 is a winch installed on the revolving body 2 in order to lift the shaft body 26 and an extension (attachment for burying a portion of the last pile on the ground). The wire rope 56 wound and fed by the winch 55 is hung around a sheave 57 provided on the top of the leader 7 and a hook (not shown) is suspended. In FIG. 2, 59 indicates an obstacle at the top of the machine at the work site.

  Next, an operation of inserting the shaft body 26 into the drive shaft 30 of the rotary drive device 16 using this device will be described. As shown in FIG. 9, moving means 61 such as rollers, rollers, or a conveyor is provided on the loading platform of a transport vehicle 60 such as a truck that transports the shaft body 26 so that the shaft body 26 can be easily moved. The shaft 26 is placed on the moving means 61 when the 26 is mounted.

  On the other hand, the turning motor 24 of the vertical turning device 19 is operated so that the rotation driving device 16 is turned sideways as shown in FIG. Further, the drive sprocket 13 is operated to adjust the height of the rotary drive device 16 to the height of the shaft body 26 on the transport vehicle 60. Then, the shaft body 26 is inserted into the rotary drive device 16 so that the key 36 in the intermediate portion of the shaft body 26 fits into the longitudinal groove 30a of the drive shaft 30 of the rotary drive device 16, and the key 36 is positioned at the sleeve 39. Insert up to the vertical groove 43 and match the position of the horizontal groove 44. When the shaft body 26 is inserted, the rear part in the insertion direction (in this example, the upper part at the time of erection) is supported by the conveyance vehicle 60.

  Next, the drive motor 27 is rotated forward to insert the key 36 into the lateral groove 44. Then, as shown on the right side of FIG. 5, the vertical drive device 52 is operated in the contracting direction to raise the ring 51, and the drive body 50 is rotated by energizing the force of the spring 54 to rotate the plug body 46 with the vertical groove 43 and the horizontal groove 44. The shaft 36 is fixed to the rotary drive device 16 by blocking the movement of the key 36. In this state, as shown in FIG. 10, the intermediate portion of the shaft body 26 is supported and fixed by the rotary drive device 16.

  Subsequently, as shown in FIG. 11, the turning motor 24 of the vertical turning device 19 is rotated in the opposite direction to turn the shaft body 26 vertically. At this time, if the shaft body 26 is the first shaft body, the rotary sprocket 13 is lowered along the leader 7 by the operation of the drive sprocket 13 and at the same time the shaft body 26 is rotated to build the shaft body 26 in the ground. Include. If the existing shaft body 26 is buried in the ground, the shaft body 26 is placed on the shaft body 26 and added using bolts or the like, and the shaft body 26 is built in the same manner as described above.

  After the shaft body 26 is built in this way, when the rotary drive device 16 descends to the lower limit position of the reader 7, the lock of the shaft body 26 by the plug body 46 is released. In order to achieve this unlocked state, the vertical drive device 52 is actuated in the extending direction against the force of the spring 54, and the plug 46 is detached from the intersection of the vertical groove 43 and the horizontal groove 44. Then, the rotary drive device 16 is slightly reversed to place the key 36 at the intersection of the vertical groove 43 and the horizontal groove 44.

  Subsequently, the rotary drive device 16 is raised, and the position of the key 36 at the top of the shaft body 26 is adjusted to the position of the horizontal groove 44 through the vertical grooves 30a and 43. Then, as described above, the shaft body 26 is rotated forward to put the key 36 in the horizontal groove 44, and the plug body 46 is inserted into the intersection of the vertical groove 43 and the horizontal groove 44 to lock. Then, it is built in the same way as described above. When the rotary drive device 16 descends to the lower limit position of the reader 7, the shaft body 26 is unlocked by the plug 46, the rotary drive device 16 is pulled up, and a new shaft body 26 is inserted into the rotary drive device 16 by the above operation. .

  In the case of using a shaft body to be collected, such as a screw auger or kelly bar, a pulling operation is required after excavation. In this case, the pulled shaft body 26 is loaded on the loading platform of the transport vehicle 60 at the work site.

  Also in the case of this pulling out, the intermediate part of the shaft body 26 is supported and fixed to the rotary drive device 16, and the shaft body 26 is turned sideways by the longitudinal rotation together with the rotary drive device 16. Then, the shaft body 26 is pulled out from the rotation drive device in a state where the front portion of the shaft body 26 in the pulling direction is supported by the transport vehicle 60.

  In this way, in this basic machine, since the penetrating rotary drive device 16 is attached via the vertical turning device 19, the rotary drive device 16 can be turned sideways. By inserting and attaching the shaft body to the shaft 30, it is not necessary to move from the construction site for excavation or pile driving at the construction site where the obstacle 59 is located on the upper portion, and the shaft body 26 can be attached to and detached from the rotary drive device 16. Can be done efficiently.

  Further, when the shaft body 26 is added, it is not necessary to move the machine by traveling, and it is not necessary to align the new shaft body 26 with the existing shaft body 26. For this reason, the work efficiency when the obstacle 59 exists in the upper part can be improved significantly.

  When carrying out the present invention, the upper portion of the shaft body 26 can be chucked by the chuck device 35 and inserted into and removed from the rotary drive device 16, but as shown in the present embodiment, the shaft body Since the middle part of the shaft 26 is supported and fixed, it is swung vertically, so that the shaft body 26 can be easily set or pulled out without contacting the upper obstacle 59 or the ground.

  In the present embodiment, when the shaft body is inserted and withdrawn, the rear part of the shaft body 26 in the inserting direction and the front part in the withdrawing direction are supported by the transport vehicle 60, respectively, and the intermediate part of the shaft body 26 in the vertical turn. Is supported by the rotary drive device 16, the burden on the rotary drive device 16 and the like due to the unbalanced load of the shaft body 26 is reduced, and damage to the device can be prevented.

  The present invention can also be applied to a pile construction method or a ground improvement method in which a pile is built in the ground and kneaded while pouring ready-mixed concrete to construct the pile.

  In the present invention, the chuck device does not use the key 36 or the grooves 43 and 44 described in the above embodiment, but has a system in which a wedge is inserted between the shaft body 26 and the drive shaft 30. It is possible to use other methods such as a method of fixing the shaft body to the drive shaft 30 by fastening with a band.

It is a side view which shows one Embodiment of the basic machine of this invention. It is a front view of FIG. It is a partial cross section side view of the vertical turning apparatus and rotation drive device of this Embodiment. It is a fragmentary sectional top view of the vertical turning apparatus and rotation drive device of this Embodiment. It is a longitudinal cross-sectional view which shows the rotational drive apparatus and chuck | zipper apparatus of this Embodiment. It is a perspective view of a chuck device and a shaft object of this embodiment. It is a side view which shows a part of chuck apparatus of this Embodiment. It is bottom sectional drawing which shows a part of chuck apparatus of this Embodiment. In this Embodiment, it is a figure which shows the state before inserting a shaft body in a rotation drive device. In this Embodiment, it is a figure which shows the state which inserted the shaft body in the rotational drive apparatus. In this Embodiment, it is a figure which shows the state made to stand after inserting a shaft body in a rotational drive device.

Explanation of symbols

1: traveling body, 2: swiveling body, 3: swiveling device, 4: cab, 5: power unit, 6, 9: outrigger, 7: leader, 8: backstay cylinder, 10: lifting frame, 11: guide pipe, 12: Guide give, 13: Drive sprocket, 14: Driven sprocket, 15: Roller chain, 16: Rotation drive device, 16a: Frame body, 19: Vertical turning device, 20: Inner ring, 20a: Internal gear, 21: Bearing, 22: outer ring, 23: turning body, 24: turning motor, 25: output gear, 26: shaft body, 29: bearing, 30: drive shaft, 30a: longitudinal groove, 31: external gear, 33: output gear, 35 : Chuck device, 36: Key, 39: Sleeve, 40: Flange, 41: Bolt insertion hole, 42: Bolt, 43: Vertical groove, 44: Horizontal groove, 46: Plug body, 47: Guide plate, 49: Shaft, 50 : Driving body, 1: Ring, 52: vertical driving unit, 53: spring attachment portion, 54: spring, 55: winches, 56: wire rope, 57: sheave, 59: obstacles 60: transport vehicle, 61: moving means

Claims (4)

A reader attached to a self-propelled vehicle;
An elevating frame attached so as to be movable up and down along the reader;
A vertical turning device attached to the lifting frame;
A basic machine, comprising: an intermediate-type rotary drive device that is attached to a rotary body of the vertical turning device and that is driven to rotate by inserting a shaft body for excavation or erection inside. A leader is attached to the self-propelled vehicle, and a penetrating rotary drive device is attached to the leader so as to be able to turn vertically,
A method for attaching and detaching a shaft body comprising: turning the rotational drive device laterally; then inserting or removing a shaft body for excavation or erection from the lateral direction; The method of attaching or detaching the shaft body according to claim 2,
After the rotary drive device is turned sideways, when the shaft body is inserted, the shaft body is inserted into the rotary drive device with the rear part in the insertion direction supported by the transport vehicle, and the intermediate portion of the shaft body is rotated. A method for attaching and detaching a shaft body, wherein the shaft body is erected by longitudinally turning the shaft body together with the rotary drive device while being supported and fixed to the drive device. The method of attaching or detaching the shaft body according to claim 2,
When pulling out the shaft body from the rotation drive device, the shaft body is fixed to the rotation drive device with the intermediate portion of the shaft body supported by the rotation drive device, and the shaft body is swung longitudinally together with the rotation drive device. A method for attaching and detaching a shaft body, characterized in that the shaft body is pulled out from the rotation drive device in a state where the shaft body is in a horizontal direction and a front portion of the shaft body in a pulling direction is supported by a transport vehicle.

Images