JP4113030B2 - Steel pipe pile burial apparatus and steel pipe pile burial work machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present inventionSteel pipe pile burial equipment andThe present invention relates to an improvement of a work machine for burying steel pipe piles.
[0002]
[Prior art]
As a method for burying a steel pipe pile used as a support pile for a building, a RES-P method (Reinforced Earth with Steel Pipe) as disclosed in Non-Patent Document 1 is already known.
[0003]
The steel pipe pile embedding device and the steel pipe pile embedding working machine used in this construction method are roughly as shown in FIG. 11 (a) or FIG. 11 (b).
[0004]
FIG. 11A shows a truck-type steel pipe pile embedding work machine. The main parts of the steel pipe pile embedding work machine 100 are a vehicle main body 102 provided with a boom 101, and a tip of the boom 101. It is comprised by the attached leader 103 and the hydraulic rotary percussion 104 which moves to the up-down direction along this leader 103. Of these, it is the leader 103 and the hydraulic rotary percussion 104 that substantially function as the steel pipe pile embedding device 105.
[0005]
The actual steel pipe pile burial operation involves holding the upper end of the steel pipe pile by a chuck mechanism provided at the lower end of the hydraulic rotary percussion 104 and operating the hydraulic rotary percussion 104 to rotate the steel pipe pile downward. This is done by moving the steel pipe pile into the ground gradually.
[0006]
FIG. 11 (b) shows a crawler type steel pipe pile embedding work machine 106, in which an auger motor 107 is used instead of the hydraulic rotary percussion 104, and the auger motor 107 and the leader 103 embed the steel pipe pile. Although it differs from the thing of Fig.11 (a) by the point which comprises the apparatus 108, regarding the work method of holding | maintaining the upper end part of a steel pipe pile and moving it downward while rotating a steel pipe pile, it makes it plunges into the ground. Both are the same.
[0007]
[Non-Patent Document 1]
Study Group for Foundation Ground Reinforcement for Detached Houses, “RES-P Method to Reinforce Building Foundation Ground”
[0008]
[Problems to be solved by the invention]
The conventional method of embedding steel pipe piles described above is based on the premise that the upper end of the steel pipe pile is held and the steel pipe pile is moved downward while rotating, so that it enters the ground. In such a case, when the upper end of the steel pipe pile is pressed by the steel pipe pile burial device, the steel pipe pile bends, and the steel pipe pile rotates eccentrically so that there is a gap between the hole on the ground side and the steel pipe pile. There is a possibility that a force that presses the steel pipe pile is not properly transmitted to the steel pipe pile.
[0009]
In addition, in order to handle long steel pipe piles, it is necessary to lengthen the leader that serves as a guide for hydraulic rotary percussion and auger motors. Therefore, it will inevitably increase in size. For this reason, there is a possibility that the work cost may be adversely affected, and in some cases, it may be difficult to carry the work machine into a small work site.
[0010]
In order to avoid such problems, a method has been devised in which a small burial device or work machine is used, and a steel pipe pile cut shortly is buried and welded, but welding is frequently performed. As a result, the mechanical strength of the steel pipe pile may be lowered, and as a result of complicated work, there is a disadvantage that the time required for burial becomes redundant.
[0011]
OBJECT OF THE INVENTION
  Accordingly, an object of the present invention is to eliminate the drawbacks of the prior art, and even when a long steel pipe pile is buried, there is no fear of causing the steel pipe pile to be bent, and the embedding apparatus and work machine are small in size. Can be buried in a short time without the need to cut or weld steel pipe piles.Steel pipe pile burial equipment andThe object is to provide a working machine for steel pipe pile burial work.
[0012]
[Means for Solving the Problems]
  In order to achieve the above object, a steel pipe pile embedding device according to the present invention is attached to a work machine as an attachment to hold the steel pipe pile in an upright state, rotates the steel pipe pile with respect to the central axis of the steel pipe pile, and A steel pipe pile embedding device that plunges the steel pipe pile into the ground by applying a downward pressing force, the chuck portion that allows the steel pipe pile to penetrate and holds the steel pipe pile from the outside in the radial direction, and An opening / closing mechanism for opening and closing the chuck portion, a rotation drive mechanism for rotating the chuck portion with respect to a central axis of the steel pipe pile, a feed mechanism for moving the chuck portion along the central axis, and the chuck And a posture adjusting mechanism that swings the posture of the portion in two directions orthogonal to the vertical axis. And the posture adjustment mechanism described above isA shoe constituting the attachment means for the vehicle bodyA hoisting arm whose lower end is pivotally attached to the table and a swinging arm whose upper end is pivotably attached to the hoisting arm in a direction perpendicular to the hoisting direction.When,A guide rod comprising a hydraulic cylinder that changes the posture of the swing arm in two directions perpendicular to the vertical axis, and an embedded device body having the chuck portion fixed to both sides of the swing arm It is equipped with movability in the vertical direction along.
[0013]
  Here, a slider is slidably fitted to the guide rod of the swing arm described above so as to be slidable from the outside., A connecting memberThe embedding device main body equipped with the chuck portion is attached integrally at two left and right positions via a table, and the feed mechanism isIt is a connecting memberThe slider and the embedding device main body are configured to include a pair of hydraulic cylinders and piston rods that move the slider and the burying device main body in the vertical direction along the guide rods. And it is good also as a structure which hold | maintains each said hydraulic cylinder in the offset state via the stay in the upper end part of the front surface of the said rocking | swiveling arm.
[0014]
  Furthermore, a pair of chuck portions formed in a semicircular arc shape that holds the steel pipe pile from the outside in the radial direction and an opening / closing mechanism that opens and closes the chuck portion, and a large-diameter hole that penetrates the steel pipe pile in the center portion. An opening / closing mechanism for driving the chuck portion, a pressing block that presses the pair of chuck bodies inward, a hydraulic cylinder that outputs a pressing force for each pressing block, and the hydraulic cylinder A thrust bearing that sequentially transmits the pressing force to the pressing blocks, a pressing force transmission piece, and a cam body, and a configuration in which the hydraulic cylinder is mounted on a top plate included in the casing It is good.
[0015]
  Also, a cam mounting sleeve as a rotating body in the casing described above, in which the cam body is rotatably mounted and a pair of chuck bodies are installed on the inner peripheral surface side, and an outer fit to the cam mounting sleeve And a hydraulic motor that integrally rotates the cam mounting sleeve and the chuck body from the outside of the casing via an annular sprocket, and the hydraulic motor is mounted on the slider..
[0016]
  Furthermore, in order to achieve the above object, a steel pipe pile embedding work machine according to the present invention is equipped with the steel pipe pile embedding device described in any one of the plurality of steel pipe pile embedding devices described above. A self-propelled vehicle main body and an outrigger that protrudes outward from the vehicle main body and contacts the ground are provided.
[0017]
  Here, in the case of the above-mentioned steel pipe pile burying device, steelWhen embedding the pipe pile, first, in order to prevent an abnormality in the embedding direction of the steel pipe pile due to the inclination of the work machine or the like, the posture adjusting mechanism is operated to make the central axis of the chuck portion coincide with the vertical direction. This makes it possible to embed a steel pipe pile vertically even when there is an abnormality such as inclination or unevenness in the scaffold of the work machine.
  Next, after operating the feed mechanism to raise the chuck portion along its central axis, that is, the vertical axis, the feed mechanism is stopped. At this time, the separation distance between the chuck portion and the ground is determined by taking into account the rigidity and diameter of the steel pipe pile, and the chuck portion and the ground that hold the steel pipe pile even when rotational force or pressing force is applied to the steel pipe pile. The steel pipe pile is restricted to a range where no bending occurs. Next, the opening and closing mechanism is operated to open the chuck portion, and the lower end portion of the steel pipe pile lifted by an arbitrary method is made to penetrate the chuck portion and protrude downward to come into contact with the ground.
  Then, in this way, with the chuck portion positioned at a position where the steel pipe pile does not bend between the chuck portion and the ground, the open / close mechanism is operated to close the chuck portion. Hold the steel pipe pile from the outside in the radial direction(Steel pipe pile holding process).
  Next, the rotary drive mechanism and the feed mechanism are operated, and the chuck portion is rotated while being lowered so that the steel pipe pile is rotated with reference to the central axis of the steel pipe pile, and a downward pressing force is applied to the steel pipe pile. Begin substantial burial work(Split burial process).ThisSteel pipe piles gradually enter the ground and are buried.
  Then, when the lowering operation of the chuck portion reaches the stroke end of the feed mechanism, the operations of the rotation drive mechanism and the feed mechanism are stopped. Next, the holding state of the steel pipe pile is released by operating the opening / closing mechanism to open the chuck portion. And after operating a feed mechanism again and raising a chuck | zipper part along the center axis | shaft, a feed mechanism is stopped. Similarly to the above, the raising amount of the chuck portion is restricted to a range in which the steel pipe pile is not bent between the chuck portion and the ground in consideration of the rigidity and diameter of the steel pipe pile.(Holding position moving step).
[0018]
  According to such a configuration, the steel pipe pile can be held at a position spaced upward from the ground within a range in which the steel pipe pile does not bend between the chuck part that holds the steel pipe pile and the ground. Rotating the steel pipe pile with reference to the central axis of the steel pipe pile and applying a downward pressing force does not cause bending of the steel pipe pile, and the force pressing the steel pipe pile is properly transmitted to the steel pipe pile Will come to be. Moreover, as a result of eliminating the deflection of the steel pipe pile, there is no adverse effect such as a gap between the steel pipe pile and the ground side hole due to the rotation of the steel pipe pile, and when the steel pipe pile is used as a support pile for a building The problem that the yield strength of steel pipe piles against vertical loads is reduced is also eliminated.
[0019]
  The holding position of the steel pipe pile can be arbitrarily determined within the range where the pipe pile does not bend between the holding part of the steel pipe pile and the ground, so if this holding position is lowered, the steel pipe pile will be long. Even if it exists, the moving stroke of a feed mechanism can be designed short, and the embedding apparatus required for the embedding work of a steel pipe pile is reduced in size. Therefore, the work cost can be reduced, and the work of embedding steel pipe piles in a narrow work site is facilitated.
  Furthermore, since the maximum moving stroke of the feed mechanism is set to the maximum value of one feed amount, the steel pipe pile is subjected to the burial work by multiple feeds, so the steel pipe pile to be buried is long. Even if it exists, it can embed in a short time without cutting and welding work of a steel pipe pile leading to a decrease in mechanical strength.
[0020]
The steel pipe pile embedding work machine of the present invention is a self-propelled steel pipe pile embedding work machine equipped with a steel pipe pile embedding apparatus, and in order to realize the embedding work effectively utilizing the above-described embedding apparatus, In particular,
This embedding device is provided on one side of the vehicle main body, and the other side of the vehicle main body includes an outrigger that protrudes outward from the vehicle main body and contacts the ground.
[0021]
The strength of the force that can be used when the steel pipe pile held by the chuck part of the burial device enters the ground is the magnitude of the driving force of the feed mechanism that moves the chuck part, as well as the work of burying the steel pipe pile equipped with the burial device It is also limited by the weight of the vehicle body of the work machine.
If the buried device is attached to the tip of the vehicle body, the weight of the buried device and the vehicle body is G, and the vehicle body that is grounded from the center of gravity of the buried device and the vehicle body is grounded. If the horizontal separation distance to the rear end portion is r1, and the horizontal separation distance from the rear end portion of the vehicle body that is in contact with the ground to the embedding device is r2, the embedding device is used when the steel pipe pile enters the ground. When the reaction force N acting on the vehicle exceeds (r1 / r2) · G, the vehicle body is lifted in the form of swinging with the rear end of the vehicle body in contact with the ground as a fulcrum. No matter how large the driving force of the feed mechanism to be moved is, the magnitude of the force that causes the steel pipe pile to enter the ground is limited to (r1 / r2) · G.
Therefore, in the present invention, an outrigger that protrudes outward from the vehicle main body and contacts the ground is provided on the other side of the vehicle main body in which the burying device is disposed, so that the above-described (r1 / r2) is achieved. Even if a small and lightweight work machine is used, the steel pipe pile enters the ground with a force commensurate with the driving force of the feed mechanism that moves the chuck part, even when a small and lightweight work machine is used. I was allowed to be.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, with reference to the drawings, the present inventionTakeSteel pipe pile burialEquipment andAn embodiment of a working machine for steel pipe pile embedding work will be described in detail.
[0023]
FIG. 1 is a perspective view showing a steel pipe pile embedding work machine 1 according to an embodiment of the present invention applied from the front side, and FIG. 2 is a steel pipe pile embedding work machine 1 according to the embodiment. It is the perspective view which showed from the back side.
[0024]
This steel pipe pile embedding work machine 1 is generally constituted by a vehicle main body 3 capable of self-propelling, and a steel pipe pile embedding device 2 and an outrigger 4 attached to the vehicle main body 3.
[0025]
The vehicle body 3 is obtained by removing accessories such as a boom unit and a soil discharging board from a commercially available small-sized power shovel. Instead, the steel pipe pile burying device 2 is mounted as an attachment, and on the other side of the vehicle body 3, that is, the rear end side, an outrigger 4 is mounted instead of the conventional earth removing plate as shown in FIG. Yes.
[0026]
In this embodiment, the crawler type vehicle main body 3 is used, but a truck type vehicle main body may be used instead.
[0027]
As shown in FIG. 2, the outrigger 4 protrudes outside the vehicle body 3 beyond the rear end portion of the vehicle body 3 that is in contact with the ground, that is, the crawler 10, and is attached to the crawler 10. It is configured to come in contact with the ground at a position behind the rear end. The outrigger 4 itself is a known one driven by a hydraulic cylinder, and is retracted and stored upward when the steel pipe pile embedding work machine 1 is traveling.
[0028]
As shown in FIG. 1, the steel pipe pile embedding device 2 includes a staple 5, a undulation arm 6, a swing arm 7, and a slider 8, an embedding device main body 9, and the like that constitute attachment means for the vehicle main body 3. Consists of.
[0029]
The hoisting arm 6 is pivotally attached to the staple 5 via a pin 11 at its lower end, and is swung in the direction of arrow a in FIG. 1 using a hydraulic cylinder 12 as a drive source. The upper end of the swing arm 7 is pivotally attached to the undulation arm 6 via a pin 13 and is swinged in the direction of arrow b in FIG. 1 using the hydraulic cylinder 14 as a drive source. A support member 15 having a rectangular guide groove is integrally fixed to the back surface of the swing arm 7, and the guide groove slides on the lower end of the swing arm 6, thereby swinging the swing arm 6. The backlash and the like of the moving arm 7 are prevented. The control valve of the hydraulic circuit that operates the hydraulic cylinders 12 and 14 is provided on the driver's seat of the vehicle body 3.
[0030]
The posture adjustment mechanism 16 in the present embodiment is constituted by these arms 6 and 7 and pins 11 and 13 and hydraulic cylinders 12 and 14, etc. The posture of the embedded device main body 9 attached to the swing arm 7 via the slider 8 by changing the posture of the swing arm 7 in one direction, that is, the direction of the arrow a and the direction of the arrow b in FIG. More specifically, the posture of the chuck portion (24) built in the embedding device body 9 can be arbitrarily adjusted.
[0031]
The slider 8 is slidably attached to the two guide rods 17, 17 fixed on the left and right sides of the front surface of the swing arm 7 so as to be fitted from the outside. The embedded device main body 9 is integrally attached to the position. The cylinder bottom portions of the two hydraulic cylinders 19 and 19 that are offset from the front surface of the swing arm 7 via the stay 18 are fixed to the upper position of the front surface of the swing arm 7. The tip ends of the piston rods 20 and 20 are pivotally attached to staples 21 and 21 fixed to the left and right sides of the embedding device main body 9.
[0032]
Therefore, if the piston rods 20 and 20 are expanded and contracted by operating the hydraulic cylinders 19 and 19, the embedded device main body 9 and the slider 8 move integrally along the guide rods 17 and 17 in the vertical direction. Become. The control valve of the hydraulic circuit that operates the hydraulic cylinders 19, 19 is provided on the driver's seat of the vehicle body 3.
[0033]
The feed mechanism 22 in the present embodiment is constituted by the guide rods 17 and 17 and the slider 8, the hydraulic cylinders 19 and 19, the staples 21 and 21, and the like. By moving the apparatus main body 9 in the vertical direction along the guide rods 17, 17, the chuck part (24) built in the embedded apparatus main body 9 is moved to the central axis of the chuck part (24), that is, the vertical axis. It can be moved up and down along.
[0034]
The reason why the stays 18 and the staples 21 and 21 are provided and the hydraulic cylinders 19 and 19 are offset from the front surface of the swing arm 7 is that the combined force of the hydraulic cylinders 19 and 19 constituting the main part of the feed mechanism 22 is combined. The guide rods 17, 17 and the slider 8 are arranged so as to act directly on the center periphery of the embedding device body 9, more specifically, on the center periphery of the chuck portion (24) built in the embedding device body 9. This is to prevent damage such as galling from occurring in the sliding portion.
[0035]
The expansion / contraction stroke of the piston rods 20, that is, the vertical movement stroke of the embedding device main body 9 is a design problem and is not limited numerically, but is generally about 1 meter, for example. Further, the total length of the guide rods 17 and 17 and the swing arm 7 is, for example, about 2 meters, compared with the conventional reader 103 as shown in FIG. 11 (a) or FIG. 11 (b). The scale is a fraction of a fraction.
[0036]
Next, the structure of the embedding device main body 9 will be described in detail with reference to FIGS. 3 and 4.
3 is a partial cross-sectional plan view showing the burying device main body 9 from above, and FIG. 4 is a cross-sectional view showing the burying device main body 9 divided by the arrow AA in FIG.
[0037]
As shown in FIG. 4, the casing 35 of the embedding device main body 9 is formed of an outer cylinder portion 36, a top plate 37, and a bottom plate 38.
[0038]
A hole 40 that allows penetration of the steel pipe pile 39 is formed in the central portion of the top plate 37. The hole 40 is used as a guide when passing the lower end of the steel pipe pile 39 lifted by a crane or the like inside the hole 40. A locating ring 67 is attached. Further, an annular peripheral wall 41 having the same center as the hole 40 and protruding integrally is provided on the lower surface side of the top plate 37, and a radial bearing is provided on the enlarged diameter portion of the inner peripheral surface of the lower end portion of the annular peripheral wall 41. The outer ring of 42 is internally fitted, and the inner ring of the radial bearing 42 is fitted with a reduced diameter portion of the outer peripheral surface of the upper end portion of the sleeve 43 having a flange 43a at the center of the outer peripheral surface. The end face of the upper diameter reduced portion of the cam mounting sleeve 44 is integrally fixed with a bolt 45.
[0039]
The cam mounting sleeve 44 is provided with a thick portion 44d for mounting the cam body 26 at the central portion in the axial direction, one stage above it, and three stages of reduced diameter portions below it. Is the body. A total of four cam mounting spaces 46 are formed in the thick portion 44d of the cam mounting sleeve 44 in a radial direction with a pitch of 90 degrees in the circumferential direction. Further, the cam body 26 is rotatably attached via a pin 47.
[0040]
A substantially rectangular cutout 26a for fitting the pressing block 25 installed in the cam mounting space 46 is formed inside the lower end of the cam body 26. A lever 26 b that penetrates the mounting space 46 and extends radially outward of the cam mounting sleeve 44 is formed.
[0041]
An annular sprocket 31 is externally fitted to the first-stage reduced diameter portion 44 a located immediately below the thick portion 44 d of the cam mounting sleeve 44, and the cam mounting sleeve 44 is connected to the cam mounting sleeve 44 by a bolt 48. The inner ring of the radial bearing 49 is externally fitted to the second-stage reduced diameter portion 44b, and one planar seat of the thrust bearing 50 is attached to the third-stage reduced diameter portion 44c. (Upper side) is fitted.
[0042]
A large-diameter hole 51 is formed in the center of the bottom plate 38, and an annular peripheral wall 52 having the same center as the hole 51 is integrally provided on the upper surface side of the bottom plate 38. Then, the other flat seat (lower side) of the thrust bearing 50 is fitted into and supported by the reduced diameter portion of the inner peripheral surface of the lower end portion of the annular peripheral wall 52, and the weight of the sleeve 43, the cam mounting sleeve 44, etc. It is supported by the bottom plate 38 via the bearing 50.
[0043]
On the other hand, on the lower end surface of the cam mounting sleeve 44, an annular member 54 having a hole 53 that allows the steel pipe pile 39 to pass therethrough is fixed and attached with a bolt 55. In a space defined by the upper end surface of the member 54 and the lower end surface of the sleeve 43, a chuck portion 24 including a pair of chuck main bodies 23, 23 formed in a semicircular cross section is installed. Since the upper and lower end surfaces of the chuck bodies 23 and 23 are supported by the lower end surface of the sleeve 43 and the upper end surface of the annular member 54, they do not move in the vertical direction, but the cam mounting sleeve 44 moves inward and outward in the radial direction. Is possible.
[0044]
The radius of the inner arc and the thickness of the arc part of the chuck bodies 23 and 23 are determined by the outer diameter of the steel pipe pile 39 to be embedded, but a plurality of types of chuck bodies 23 having different inner arc radius and arc part thickness are used. , 23 in advance, it is possible to cope with the embedding work of the steel pipe piles 39 having various diameters within the range not exceeding the inner diameters of the sleeve 43, the hole 53 and the locating ring 67. The replacement work of the chuck bodies 23 and 23 is performed by removing the annular member 54 and the bolt 55 and replacing the chuck bodies 23 and 23.
[0045]
On the other hand, a pressing force transmission sleeve 28 is fitted to the outer peripheral surface of the annular peripheral wall 41 projecting from the lower surface side of the top plate 37 so as to be slidable in the vertical direction. One planar seat (upper side) of the thrust bearing 56 is fitted and attached to the enlarged diameter portion of the surface, and the other planar seat (lower side) of the thrust bearing 56 presses the lever 26b of the cam body 26. This is in contact with the upper end surface of the pressing force transmitting piece 27 having a substantially L-shaped cross section, which is a constituent element. A high-hardness end block 57 constituting a contact portion with the lever 26 b is fixed to the pressing force transmission piece 27 with a bolt 58, and a moderate roundness is provided at the tip of the lever 26 b that contacts the end block 57. Attached. Reference numeral 27a is a guide plate that is bifurcated from the lower end portion of the pressing force transmitting piece 27 and extends downward, and slidably sandwiches the lever 26b so as to straddle the lever 26b of the cam body 26.
[0046]
Further, a circumferential groove 59 is formed on the outer peripheral surface of the pressing force transmission sleeve 28, and the annular member 60 that is rotatably fitted in the circumferential groove 59 has a total of 4 at a pitch of 90 degrees in the circumferential direction. The individual cam supporters 61 are fixed with bolts 62. A guide groove 61a extending in the vertical direction is formed on the inner side of the cam supporter 61, and the outer side of the pressing force transmission piece 27 is slidably fitted into the guide groove 61a, thereby preventing the pressing force transmission piece 27 from falling off. ing.
[0047]
As shown in FIG. 3, a total of four hydraulic cylinders 29 are fixedly attached to the outer peripheral portion of the top surface of the top plate 37 with bolts 63 at a pitch of 90 degrees in the circumferential direction. The head of the height adjusting bolt 65 planted on the upper end surface of the pressing force transmission sleeve 28 is pressed by the tip of the piston rod 64 that passes through 37 and protrudes downward. The height adjustment bolt 65 is for adjusting the contact between each piston rod 64 and the pressing force transmission sleeve 28 by absorbing errors caused by processing errors, assembly errors, individual differences of the hydraulic cylinders 29, and the like.
[0048]
In the above configuration, the main part of the embedding device main body 9 includes a chuck portion 24 composed of a pair of chuck main bodies 23 and 23 formed in a semicircular cross section, and a pressure required for opening and closing the chuck portion 24. Necessary for rotating the block 25, the cam body 26, the pressing force transmitting piece 27, the thrust bearing 56, the pressing force transmitting sleeve 28, the height adjusting bolt 65, the opening / closing mechanism 30 such as the hydraulic cylinder 29, and the chuck portion 24. The rotary drive mechanism 34 includes a sprocket 31, a chain 32, a hydraulic motor 33, and the like.
[0049]
The hydraulic motor 33 is fixed on the slider 8 as shown in FIG. 3, and the chain 32 wound around the sprocket 31 as shown in FIG. 4 is on the back side of the outer cylinder portion 36 of the casing 35. It is pulled out to the slider 8 side through an opening (not shown) drilled in and is wound around a small sprocket 66 of the hydraulic motor 33.
[0050]
Here, with reference to FIG. 4, operation modes of the opening / closing mechanism 30, the chuck portion 24, and the rotation driving mechanism 34 will be briefly described.
[0051]
When the four hydraulic cylinders 29 serving as the driving sources of the opening / closing mechanism 30 are simultaneously operated to cause the piston rods 64 to protrude downward, the tip ends of the piston rods 64 via the respective height adjusting bolts 65 are pressed force transmission sleeves 28. Is pressed downward. Then, the pressing force transmission sleeve 28 moves downward, presses the thrust bearing 56, and simultaneously moves the four pressing force transmission pieces 27 that are in contact with the lower end surface of the thrust bearing 56 downward. The end block 57 of the piece 27 presses the tip of the lever 26b of each cam body 26 downward. By this pressing operation, the four cam bodies 26 rotate with the respective pins 47 as fulcrums, and the pressing blocks 25 fitted in the notches 26 a of the cam bodies 26 are pushed out radially inward of the cam mounting sleeve 44. Finally, the tip of the pressing block 25 presses the outer peripheral surface of the chuck body 23 from the radially outer side to the inner side, so that each chuck body 23 moves from the radially outer side to the inner side. The chuck portion 24 composed of the main bodies 23, 23 holds the steel pipe pile 39 strongly from the outside in the radial direction.
[0052]
Specifically, of the four pressing blocks 25, two pressing blocks 25 adjacent in the circumferential direction of the cam mounting sleeve 44 press one chuck body 23, and the remaining two pressing blocks 25 are the other chuck body. 23 will be pressed.
[0053]
Since the hole 40 is drilled in the top plate 37 of the burying device main body 9 and the hole 53 is drilled in the annular member 54 of the burying device main body 9, as shown in FIG. Can be held through the chuck portion 24 in the vertical direction.
[0054]
Further, if the piston rod 64 is retracted upward by operating the four hydraulic cylinders 29 serving as the driving source of the opening / closing mechanism 30, the force for pressing the chuck bodies 23, 23 toward the radially inner side disappears. The chuck bodies 23 and 23 can be easily opened. When the chuck bodies 23 and 23 are to be forcibly opened when the piston rod 64 is retracted, the opposing surfaces of the arc-shaped ends of the chuck bodies 23 and 23 are filled with an elastic body such as urethane rubber. Or install a spring or the like. The control valve of the hydraulic circuit that operates the hydraulic cylinders 29, 29, 29, 29 in synchronization is provided on the driver's seat of the vehicle body 3.
[0055]
On the other hand, when the hydraulic motor 33 serving as a drive source of the rotational drive mechanism 34 is operated, the small sprocket 66 fixed to the motor shaft of the hydraulic motor 33 rotates, and this rotational driving force is transmitted to the sprocket 31 via the chain 32. The sprocket 31 and a member substantially integrally fixed to the sprocket 31, that is, the cam mounting sleeve 44, the inner ring of the radial bearing 49, one planar seat (upper side) of the thrust bearing 50, the annular member 54, the pin 47, cam body 26, pressing block 25, chuck portion 24, pressing force transmission piece 27, end block 57, cam supporter 61, annular member 60, other flat seat (lower side) of thrust bearing 56, sleeve 43, radial bearing 42 The inner ring starts to rotate together.
[0056]
Therefore, the chuck portion 24 can be rotationally driven by operating the hydraulic motor 33. The rotation center is the central axis CL of the steel pipe pile 39. A control valve of a hydraulic circuit that operates the hydraulic motor 33 is provided on the driver's seat of the vehicle body 3.
[0057]
The pressing force transmission piece 27 constituting a part of the opening / closing mechanism 30 rotates integrally with the cam mounting sleeve 44 and the chuck portion 24. The pressing force transmission piece 27 is connected to the pressing force transmission piece 27 through a thrust bearing 56. Since the pressing force from 28 is transmitted, the chuck unit 24 can be freely rotated regardless of whether the chuck unit 24 comprising the chuck bodies 23 and 23 is opened or closed. It is.
[0058]
That is, there is no mutual dependency between the opening / closing operation of the chuck portion 24 and the rotation operation of the chuck portion 24, and each can be operated independently.
[0059]
When actually embedding the steel pipe pile 39, the lower end portion of the steel pipe pile 39 is plunged into the ground while rotating the chuck portion 24 with the chuck portion 24 closed and holding the steel pipe pile 39 strongly. In this case, however, the reaction force acting in the axial direction of the steel pipe pile 39 does not act directly on the inner ring of the radial bearing 42 via the chuck bodies 23, 23.
[0060]
The force that enables the chuck main bodies 23 and 23 to hold the steel pipe pile 39 against the reaction force acting on the steel pipe pile 39 is originally the outer peripheral surface of the steel pipe pile 39 and the inner peripheral surface of the chuck main bodies 23 and 23. The frictional force acting between the outer circumferential surface of the steel pipe pile 39 and the inner circumference of the chuck main bodies 23, 23 when the pressing block 25 presses the chuck main bodies 23, 23 against the steel pipe pile 39. It is a product of the normal force acting between the surfaces and the coefficient of friction between the outer peripheral surface of the steel pipe pile 39 and the inner peripheral surfaces of the chuck bodies 23 and 23.
[0061]
The force that causes the vertical drag is transmitted via the pressing block 25, the cam body 26, the end block 57, the pressing force transmitting piece 27, the thrust bearing 56, the pressing force transmitting sleeve 28, the height adjusting bolt 65, and the piston rod 64. Since it is provided from the hydraulic cylinder 29, the vertical drag is finally received by the top plate 37 via the four hydraulic cylinders 29.
[0062]
That is, most of the reaction force acting in the axial direction of the steel pipe pile 39 is actually received by the top plate 37 along the aforementioned path, and a part of the reaction force acting in the axial direction of the steel pipe pile 39 is partially Since it is only transmitted to the inner ring of the radial bearing 42, the radial bearing 42 is never damaged by the shearing force acting between the inner ring and the outer ring of the radial bearing 42.
[0063]
FIG. 5 is a diagram illustrating a configuration example of a joint that is configured independently of the steel pipe pile embedding device 2 and functions as a part of the embedding device 2 by being attached to the chuck portion 24 of the embedding device 2.
[0064]
The joint 68 includes a pipe-shaped chuck side fitting portion 70 that fits the chuck portion 24 at one end of the universal joint 69, and a pipe-shaped steel pipe pile fitting portion 71 at the other end of the universal joint 69. ing.
[0065]
The outer diameter of the chuck-side fitting portion 70 is equal to the outer diameter of the steel pipe pile 39 to be buried, and the outer diameter of the steel pipe pile fitting portion 71 is equal to the inner diameter of the steel pipe pile 39.
[0066]
And the recessed part 71a fitted with the pin (72) protrudingly provided by the inner peripheral surface of the upper end part of the steel pipe pile 39 is formed in the front-end | tip part of the steel pipe pile fitting part 71. As shown in FIG. In actual use, the chuck side fitting portion 70 is fitted to the chuck portion 24 of the embedding device 2, and the steel pipe pile fitting portion 71 is fitted into the upper end portion of the steel pipe pile 39, so that the steel pipe pile 39 is held from the radially inner side. At this time, the concave portion 71 a of the steel pipe pile fitting portion 71 is fitted to the pin (72) on the inner peripheral surface of the upper end portion of the steel pipe pile 39, and prohibits rotational slippage between the joint 68 and the steel pipe pile 39.
[0067]
Next, an actual embedding operation of the steel pipe pile 39 using the steel pipe pile embedding work machine 1 and the steel pipe pile embedding device 2 according to the present embodiment will be described in order with reference to FIGS.
[0068]
First, the control valve of the hydraulic circuit that drives the hydraulic cylinders 12, 14 is installed in the driver's seat of the vehicle body 3 in order to prevent abnormalities in the burying direction of the steel pipe pile 39 due to the inclination of the working machine 1 for burying the steel pipe pile. By operating the above, the hoisting arm 6 and the swinging arm 7 constituting the main part of the posture adjusting mechanism 16 are swung, so that the central axis of the embedding device body 9, more specifically, the central axis of the chuck portion 24 is adjusted. Match the vertical direction. This makes it possible to embed the steel pipe pile 39 vertically even when the scaffold of the steel pipe pile burying work machine 1 has an abnormality such as inclination or unevenness.
[0069]
Further, at this stage, the outrigger 4 is operated so that the vehicle body 3 is supported at a position behind the rear end of the crawler 10.
[0070]
Next, the control valve of the hydraulic circuit that drives the hydraulic cylinders 19 and 19 is operated on the driver's seat of the vehicle main body 3 to drive the feed mechanism 22, and the embedded device main body 9, that is, the chuck portion 24 is moved along its central axis. Then, the hydraulic cylinders 19 and 19 are deactivated.
[0071]
At this time, the separation distance between the chuck portion 24 that holds the steel pipe pile 39 and the ground takes into account the rigidity, diameter, etc. of the steel pipe pile 39, even if a rotational force or a pressing force is applied to the steel pipe pile 39. The steel pipe pile 39 is regulated within a range where no deflection occurs between the chuck portion 24 holding the pile 39 and the ground.
[0072]
However, in this embodiment, since the expansion / contraction stroke of the piston rods 20 and 20 is about 1 meter, the embedding device main body 9 is moved to the mechanical limit position regardless of the rigidity and diameter of the steel pipe pile 39. Even if it is raised, there is no concern that the steel pipe pile 39 is bent between the chuck portion 24 and the ground. That is, the embedding device body 9 may be raised to the mechanical limit position without paying special attention.
[0073]
Subsequently, the control valves of the hydraulic circuit that drives the four hydraulic cylinders 29 are operated on the driver's seat of the vehicle body 3 to drive the opening / closing mechanism 30 and release the closed state of the chuck portion 24 to thereby release the chuck bodies 23, 23. In this state, the steel pipe pile 39 can be inserted. And the lower end part of the steel pipe pile 39 hung up using the crane etc. is penetrated from the upper part to the chuck | zipper part 24 of the embedding apparatus main body 9, is protruded below, and is made to contact | abut on the ground.
[0074]
The above is the setup work at the start of the burial work. FIG. 6 shows a state when the setup work is completed.
[0075]
Here, suppose that the weight of the steel pipe pile embedding work machine 1 that combines the steel pipe pile embedding device 2 and the vehicle body 3 is G, and grounds from the center of gravity of the steel pipe pile embedding work machine 1 to the ground. If the horizontal separation distance to the rear end portion of the vehicle body 3 is r1, and the horizontal separation distance from the rear end portion of the vehicle body 3 that is grounded to the ground to the steel pipe pile embedding device 2 is r2, the steel pipe When the reaction force N acting on the steel pipe pile embedding device 2 exceeds (r1 / r2) · G when the pile 39 enters the ground, the rear end of the vehicle body 3 that is in contact with the ground is supported as a fulcrum. As the vehicle body 3 is lifted in the form of swinging, the force that can actually be used to enter the steel pipe pile 39 into the ground is the largest (no matter how large the output of the hydraulic cylinders 19, 19 is ( r1 / r2) · G.
[0076]
Comparing the case where the vehicle body 3 is in contact with the ground only by the crawler 10 and the case where the vehicle body 3 is in contact with the ground at a position behind the crawler 10 by the outrigger 4, the rear end of the crawler 10 is temporarily assumed. If the amount of protrusion of the outrigger 4 from α is α, it will naturally be [(r1 + α) / (r2 + α)]> (r1 / r2). Therefore, when the outrigger 4 is used together, the tip of the steel pipe pile 39 is more effective. It is clear that a load can be applied to the.
[0077]
In this way, the chuck portion 24 is positioned at a position where the steel pipe pile 39 does not bend between the chuck portion 24 and the ground even if a rotational force or pressing force is applied to the steel pipe pile 39, and the steel pipe In the state where the upright state of the pile 39 is maintained, the control valve of the hydraulic circuit that drives the four hydraulic cylinders 29 is operated on the driver's seat of the vehicle body 3 to drive the opening / closing mechanism 30 to close the chuck portion 24. Thus, the steel pipe pile 39 is strongly held from the outside in the radial direction. This is the work of the steel pipe pile holding process.
[0078]
Next, the control valve of the hydraulic circuit that drives the hydraulic motor 33 and the control valve of the hydraulic circuit that drives the hydraulic cylinders 19, 19 are operated on the driver's seat of the vehicle body 3 to drive the rotation drive mechanism 34 and the feed mechanism 22. Then, by lowering the embedding device main body 9 while rotating the chuck portion 24 holding the steel pipe pile 39, the steel pipe pile 39 is rotated with reference to the central axis of the steel pipe pile 39, and a downward pressing force is applied, The substantial embedding work of the steel pipe pile 39 is started. This is the work of the divisional embedding process. By this operation, the steel pipe pile 39 gradually enters the ground and is buried as shown in FIG.
[0079]
Then, as shown in FIG. 8, the operation of the hydraulic motor 33 and the hydraulic cylinders 19, 19 is stopped when the lowering operation of the embedding device body 9 reaches the stroke end of the guide rods 17, 17 in the feed mechanism 22. . Since the lowering limit of the embedded device body 9 is regulated by the stroke of the guide rods 17 and 17 and the maximum protrusion amount of the piston rods 20 and 20, the chuck portion 24 that holds the steel pipe pile 39, that is, the holding portion of the steel pipe pile 39. Never rush into the ground. Next, the control valve of the hydraulic circuit that drives the four hydraulic cylinders 29 is operated on the driver's seat of the vehicle main body 3 to drive the opening / closing mechanism 30 to release the closed state of the chuck portion 24, thereby The chuck unit 24 is allowed to move vertically. Then, the control valve of the hydraulic circuit that drives the hydraulic cylinders 19 and 19 is operated again on the driver's seat of the vehicle main body 3 to drive the feed mechanism 22, and the embedding device main body leaving the steel pipe pile 39 at the current embedding position. 9. That is, after raising the chuck portion 24 along its central axis, the operation of the hydraulic cylinders 19 and 19 is stopped. Similarly to the above, it is necessary to regulate the rising amount of the embedding device body 9 within a range in which the steel pipe pile 39 is not bent between the chuck portion 24 and the ground in consideration of the rigidity and diameter of the steel pipe pile 39. In this embodiment, the expansion / contraction stroke of the piston rods 20 and 20 is about 1 meter, so that the mechanical limit position is not affected by the rigidity and diameter of the steel pipe pile 39 as shown in FIG. Even if the embedding device main body 9 is raised up to the point, there is no fear that the steel pipe pile 39 is bent between the chuck portion 24 and the ground. Therefore, the operator need only raise the embedded device body 9 to the mechanical limit position without paying special attention. This is the operation of the holding position moving process.
[0080]
Hereinafter, until the protrusion amount of the steel pipe pile 39 decreases to such an extent that it is difficult to hold the steel pipe pile 39 from the outside in the radial direction by the chuck portion 24 of the embedding device body 9, for example, the protrusion amount of the steel pipe pile 39 is predetermined. Until the value is less than 30 cm, the work of the steel pipe pile holding process, the work of the divided burying process, and the work of the holding position moving process are repeatedly executed, and the work of burying the steel pipe pile 39 is continued.
[0081]
According to such a structure, the steel pipe pile 39 can be hold | maintained in the position spaced apart upward from the ground in the range which does not produce bending in the steel pipe pile 39 between the chuck | zipper part 24 holding the steel pipe pile 39, and the ground. Therefore, even if the steel pipe pile 39 is rotated with reference to the central axis of the steel pipe pile 39 through the chuck portion 24 and a downward pressing force is applied, the steel pipe pile 39 is not bent, and the steel pipe pile 39 is pressed. Force to be transmitted to the steel pipe pile 39 appropriately.
[0082]
Further, as a result of eliminating the bending of the steel pipe pile 39, a problem that a gap is generated between the steel pipe pile 39 and the hole on the ground side is also prevented. Therefore, when the steel pipe pile 39 is used as a support pile of a building. In addition, the problem that the yield strength with respect to the vertical load is reduced is also solved.
[0083]
Furthermore, since the holding position of the steel pipe pile 39 can be arbitrarily determined within a range in which the steel pipe pile 39 is not bent between the holding portion of the steel pipe pile 39 and the ground, the holding position is lowered, for example, around 1 meter. Thus, even if the steel pipe pile 39 is long, the strokes of the guide rods 17 and 17 of the feed mechanism 22 and the hydraulic cylinders 19 and 19 can be designed to be short, and the steel pipe required for the embedding work of the steel pipe pile 39. Miniaturization of the pile embedding device 2 is achieved. Therefore, the work cost can be reduced, and the work of embedding steel pipe piles in a narrow work site is facilitated.
[0084]
In addition, since the maximum moving stroke of the feed mechanism 22, for example, 1 meter, is set to the maximum value of one feed amount, the steel pipe pile 39 is subjected to a plurality of feeds to perform the burial work. Even if it is long, it is possible to perform the embedding work within a short time without cutting or welding the steel pipe pile leading to a decrease in mechanical strength.
[0085]
Moreover, since the load can be effectively applied to the tip of the steel pipe pile 39 by grounding the outrigger 4 to the ground at a position behind the crawler 10, the small and lightweight steel pipe pile embedding work machine 1 is used. Even in this case, the vehicle main body 3 is not easily lifted up, and it is ensured with a force commensurate with the driving force of the hydraulic cylinders 19 and 19 in the feed mechanism 22 that moves the embedded device main body 9 incorporating the chuck portion 24. The steel pipe pile 39 can be rushed into the ground.
[0086]
In this way, the amount of protrusion of the steel pipe pile 39 is reduced below a predetermined value while the work of the steel pipe pile holding process, the work of the divided burying process and the work of the holding position moving process are repeatedly performed, and the chuck portion of the embedding device main body 9 If it becomes difficult to hold the steel pipe pile 39 from the outside in the radial direction by 24, the opening / closing mechanism 30 is driven to release the closed state of the chuck portion 24, and the vertical movement of the chuck portion 24 with respect to the steel pipe pile 39 is allowed. As a state that can be performed, the feed mechanism 22 is operated while the steel pipe pile 39 is left at the current embedding position, and the embedding device body 9 is retracted upward.
[0087]
Then, the prepared joint 68 is taken out, and the chuck side fitting portion 70 is fitted to the chuck portion 24 of the embedding device 2 as shown in FIG. The steel pipe pile 39 is internally fitted to the upper end portion, the concave portion 71a of the steel pipe pile fitting portion 71 is fitted to the pin 72 on the inner peripheral surface of the upper end portion of the steel pipe pile 39, and the steel pipe pile 39 is held from the radially inner side by the joint 68. To do.
Then, in the same manner as in the above-described divided embedding process, the control valve of the hydraulic circuit that drives the hydraulic motor 33 and the control valve of the hydraulic circuit that drives the hydraulic cylinders 19, 19 are operated on the driver's seat of the vehicle body 3. The rotary drive mechanism 34 and the feed mechanism 22 are driven to lower the burying device body 9 while rotating the chuck portion 24 holding the steel pipe pile 39 via the joint 68, so that the central axis of the steel pipe pile 39 is taken as a reference. The steel pipe pile 39 is rotated and a downward pressing force is applied, and the embedding operation is continued until the upper end of the steel pipe pile 39 becomes substantially the same height as the ground. Embed. This is the work of the final embedding process.
[0088]
Since the universal joint 69 is provided in the joint 68, even if there is a slight inclination in the direction of embedding the steel pipe pile 39, the embedding work can be performed while appropriately pressing and rotating the steel pipe pile 39. Can continue.
[0089]
Finally, when the upper end of the steel pipe pile 39 is embedded until the upper end of the steel pipe pile 39 is substantially level with the ground, the embedding device main body 9 is retracted upward, and the joint 68 is removed from the upper end of the steel pipe pile 39 to remove one piece. The embedding work for the steel pipe pile 39 is completed.
[0090]
【The invention's effect】
  Since the present invention is configured and functions as described above, according to this, even if the scaffold of the work machine has an abnormality such as inclination or unevenness, the center axis of the chuck portion is vertically adjusted by operating the posture adjustment mechanism. Steel pipe piles can be buried vertically in accordance with the direction.
[0091]
In addition, since the distance between the chuck portion, which is the holding portion of the steel pipe pile, and the ground can be regulated by operating the feed mechanism, the chuck portion, and the opening / closing mechanism, the chuck portion Even if the steel pipe pile is rotated through and a downward pressing force is applied, the steel pipe pile does not bend, and the force pressing the steel pipe pile is appropriately transmitted to the steel pipe pile. As a result of eliminating the deflection of the steel pipe pile, the problem that a gap is generated between the steel pipe pile and the hole on the ground side and the proof stress of the steel pipe pile against a vertical load is also eliminated.
[0092]
  Furthermore, the holding position of the steel pipe pile can be arbitrarily determined within the range where the pipe pile does not bend between the holding part of the steel pipe pile and the ground, so even if the steel pipe pile is long, the movement of the feed mechanism The stroke can be set short, and the embedding device required for the embedding work of the steel pipe pile is reduced in size. Therefore, the work cost can be reduced, and the work of embedding steel pipe piles in a narrow work site is facilitated.
  Moreover, since the construction is such that the steel pipe pile is subjected to burial work with the maximum moving stroke of the feed mechanism as the maximum value of one feed amount, the steel pipe pile to be buried is long. However, it is possible to perform the burying work in a short time without performing the cutting and welding work of the steel pipe pile leading to a decrease in mechanical strength.
[0093]
  Furthermore, in the present invention, a configuration is provided in which a pair of hydraulic cylinders that bias the vertical movement with respect to the embedded device main body having the chuck portion and the slider are offset from the front surface of the swing arm via the stay and the staple. Therefore, the combined force of the hydraulic cylinder that constitutes the main part of the feed mechanism acts directly around the center of the chuck part, and further, the sliding part between the guide rod and the slider is damaged by galling or the like. It is possible to effectively prevent the occurrence.
[0094]
The steel pipe pile embedding work machine of the present invention is provided with an outrigger that protrudes outward from the vehicle main body and contacts the ground on the other side of the vehicle main body equipped with an embedding device on one side. Even if it is used, the vehicle body is not easily lifted by the reaction force acting on the embedding device, and the steel pipe pile is placed on the ground with a force commensurate with the driving force of the feed mechanism that moves the chuck part of the embedding device. You can rush.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a perspective view showing a steel pipe pile embedding working machine according to an embodiment of the present invention applied from the front side.
FIG. 2 is a perspective view showing the working machine for burying steel pipe piles according to the embodiment from the rear side.
FIG. 3 is a partial cross-sectional plan view showing the outer shape of the embedding device main body constituting a part of the steel pipe pile embedding device mounted on the steel pipe pile embedding working machine according to the embodiment.
FIG. 4 is a cross-sectional view showing the embedded device main body divided by a plane including a central axis.
FIG. 5 is a view showing a configuration example of a joint attached to the burying device main body.
FIG. 6 is a side view showing a state at the time when the setting of the steel pipe pile burying work using the steel pipe pile burying work machine and the steel pipe pile burying apparatus of the embodiment is completed.
FIG. 7 is a side view showing the progress of the division embedding process in the steel pipe pile burying work using the steel pipe pile burying work machine and the steel pipe pile burying apparatus of the embodiment.
FIG. 8 is a side view showing a state at the start of the holding position moving step in the steel pipe pile burying work using the steel pipe pile burying work machine and the steel pipe pile burying apparatus of the embodiment.
FIG. 9 is a side view showing a state at the time of completion of the holding position moving step in the steel pipe pile burying work using the steel pipe pile burying work machine and the steel pipe pile burying apparatus of the embodiment.
FIG. 10 is a side view showing a state at the time of starting a final burying step in a steel pipe pile burying operation using the steel pipe pile burying work machine and the steel pipe pile burying apparatus according to the embodiment;
FIG. 11 is a side view showing a steel pipe pile embedding device and a steel pipe pile embedding work machine used in the RES-P method, FIG. 11 (a) shows a track type, and FIG. ) Shows the crawler type.
[Explanation of symbols]
1 Steel pipe pile burial work equipment
2 Steel pipe pile burial equipment
3 Vehicle body
4 Outrigger
5 Staple
6 Uneven arm
7 Swing arm
8 Slider
9 Buried equipment body
10 Crawler (endless track)
11 pins
12 Hydraulic cylinder
13 pin
14 Hydraulic cylinder
15 Support material
16 Attitude adjustment mechanism
17 Guide rod
18 Stay
19 Hydraulic cylinder
20 Piston rod
21 Staple
22 Feed mechanism
23 Chuck body
24 Chuck part
25 Pressing block
26 cam body
26a Notch
26b lever
27 Pressure transmission piece
27a Guide plate
28 Pressure transmission sleeve
29 Hydraulic cylinder
30 Opening and closing mechanism
31 sprocket
32 chain
33 Hydraulic motor
34 Rotation drive mechanism
35 casing
36 outer cylinder
37 Top plate
38 Bottom plate
39 Steel pipe pile
40 holes
41 Annular peripheral wall
42 Radial bearing
43 sleeve
43a Flange
44 Cam mounting sleeve
44a, 44b, 44c Reduced diameter portion
44d Thick part
45 volts
46 Cam mounting space
47 pins
48 volts
49 Radial bearing
50 Thrust bearing
51 holes
52 Annular wall
53 holes
54 Annular members
55 volts
56 Thrust bearing
57 End block
58 volts
59 Circumferential groove
60 annular member
61 Cam Supporter
61a Guide groove
62 volts
63 volts
64 piston rod
65 Height adjustment bolt
66 Small Sprocket
67 Locating Ring
68 joints
69 Universal joint
70 Chuck side fitting part
71 Steel pipe pile fitting part
71a recess
72 pins
100 Steel pipe pile burial work machine (conventional example)
101 boom
102 Vehicle body
103 leader
104 Hydraulic rotary percussion
105 Steel pipe pile burial equipment (conventional example)
106 Steel pipe pile working machine (conventional example)
107 Auger Motor
108 Steel pipe pile burial equipment (conventional example)

Claims (5)

The steel pipe pile is attached to the work machine as an attachment to hold the steel pipe pile in an upright state, and the steel pipe pile is plunged into the ground by rotating the steel pipe pile with reference to the central axis of the steel pipe pile and applying a downward pressing force. A steel pipe pile burial device,
A chuck part that allows the steel pipe pile to penetrate and holds the steel pipe pile from the outside in the radial direction, an opening / closing mechanism that opens and closes the chuck part, and a rotation that drives the chuck part to rotate with respect to the central axis of the steel pipe pile. A drive mechanism, a feed mechanism that moves the chuck portion along its central axis, and a posture adjustment mechanism that swings the posture of the chuck portion in two directions perpendicular to the vertical axis,
The posture adjustment mechanism, the relief arm whose lower end to the staple which constitutes the attachment means for the vehicle body is pivotally attached swingably at its upper end portion to the relief arm is perpendicular to the undulations direction constitute a swing arm pivotally mounted swingably in a direction by a hydraulic cylinder to vary in two orthogonal directions the orientation of the swing arm to a vertical axis,
A steel pipe pile burying apparatus comprising a burying apparatus main body provided with the chuck portion so as to be movable in a vertical direction along guide rods fixed to both sides of the swing arm. In the steel pipe pile embedding device according to claim 1,
The equipped with sliders slidably so as to fit the outside with respect to the swinging arm of the guide rods, the bottom front of the slider, equipped with the chuck portion via a member for connecting the staple The buried device main body is attached integrally at two places on the left and right,
The feeding mechanism includes a pair of hydraulic cylinders and piston rods that move the slider and the burying device main body up and down along the guide rods via staples that are the connecting members ,
A steel pipe pile embedding device characterized in that each hydraulic cylinder is held in an offset state via a stay at the upper end of the front surface of the swing arm. In the steel pipe pile embedding device according to claim 2,
A casing having a pair of chuck parts formed in a semicircular arc shape for holding the steel pipe pile from the outside in the radial direction and an opening / closing mechanism for opening and closing the chuck part, and a large-diameter hole through which the steel pipe pile penetrates Equipped within,
The opening / closing mechanism for driving the chuck portion includes a pressing block that presses the pair of chuck main bodies inward, a hydraulic cylinder that outputs a pressing force for each pressing block, and a pressing force of the hydraulic cylinder that is used for each pressing block. With a thrust bearing, a pressing force transmission piece, and a cam body that sequentially transmit to
A steel pipe pile embedding device, wherein the hydraulic cylinder is mounted on a top plate provided in the casing. In the steel pipe pile embedding device according to claim 3,
A cam mounting sleeve as a rotating body in the casing, the cam body being rotatably mounted, and a pair of chuck bodies installed on the inner peripheral surface side, and an annular shape fitted around the cam mounting sleeve A hydraulic motor that integrally rotates and drives the cam mounting sleeve and the chuck body from the outside of the casing via the sporocket.
A steel pipe pile burying apparatus, wherein the slider is equipped with the hydraulic motor.   A self-propelled vehicle body equipped with the steel pipe pile embedding device according to any one of claims 1 to 4 and an outrigger that protrudes outward from the vehicle body and contacts the ground. A working machine for embedding steel pipe piles.

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