JP6355968B2 - Pile steadying device - Google Patents

Description

  The present invention relates to a pile steadying device that suppresses horizontal shaking of a pile in excavation work or burial work by a pile driving machine, and particularly relates to a pile steadying device that can reduce manufacturing costs.

  In the burying operation by the pile driving machine, first, the steel pipe pile is set on the ground so that the steel pipe pile as the excavating rod extends in the vertical direction. And the lower end part of a steel pipe pile is set to the steadying apparatus of a pile, and the vertical accuracy of a steel pipe pile is ensured. Thereafter, the steel pipe pile is rotated and driven by an auger, and the steel pipe pile is buried in the ground while the horizontal vibration of the steel pipe pile is suppressed by a pile steadying device.

  Conventionally, various pile steadying devices have been proposed. For example, there is a pile steadying device described in Patent Document 1 below. In the pile steadying device (hereinafter referred to as “conventional steadying device”) of Patent Document 1 below, as shown in FIG. 10, a base member 340 is attached to the lower end of a reader (not shown), and a pair of The holding members 350A and 350B are attached to both end portions 340a and 340b of the base member 340 via a support pin 345 so as to be rotatable in the horizontal direction. Each clamping member 350A, 350B is sandwiched around the steel pipe pile 330 in a state where the rotation is restricted by inserting the fixing pin 352P into each insertion hole 351b1 formed in the distal end portion 351b.

  Here, as shown in FIG. 11A, the clamping member 350A (350B) has an arcuate upper plate portion 351, a block portion 352, and a lower plate portion 353, and these upper plate portion 351 and the block portion. 352 and the lower block portion 353 are integrally formed. The radially inner end 351a of the upper plate portion 351 and the radially inner end 353a of the lower plate portion 353 protrude from the block portion 352 in the radially inner direction, and an arc-shaped resin collar (resin liner) 380 is provided. A first recess 391 for assembling is formed. Further, both end portions 351b and 351c in the circumferential direction of the upper plate portion 351 and both end portions 353b and 353c in the circumferential direction of the lower plate portion 353 protrude from the block portion 352 in the circumferential direction, and the fixing member 370 is assembled. The second recess 392 and the third recess 393 are formed.

  Thus, as shown in FIG. 11A to FIG. 11B, first, the resin collar 380 is assembled to the first recess 391. At this time, the radially inner end surface 380a of the resin collar 380 is slightly protruded radially inward from the upper plate portion 351 and the lower plate portion 353. Thereafter, in this state, each fixing member 370 is assembled to the second recess 392 and the third recess 393, and the bolt 371 is screwed into the screw holes 352a and 352b formed at both ends in the circumferential direction of the block portion 352. . As a result, the resin collar 380 is held by the clamping member 350A (350B).

  In the conventional steady rest device FD3, as described above, the steel pipe pile 330 that is rotationally driven contacts the radially inner end surface 380a of the resin collar 380 while the resin collar 380 is held. Thereby, the horizontal deflection of the steel pipe pile 330 is suppressed while preventing the steel pipe pile 330 from being damaged. The conventional steady rest device FD3 uses an arc-shaped resin collar 380 as a structure for suppressing horizontal deflection of the steel pipe pile 330, such as a driven roller that rotates while being in contact with the rotating steel pipe pile 330. The rotation mechanism is not used.

  In other words, the structure around the steel pipe pile 330 becomes larger when a rotating mechanism such as a follower roller is used, whereas the use of the arc-shaped resin collar 380 and the clamping members 350A and 350B The structure is small. Therefore, the conventional steadying device FD3 has a relatively compact configuration as a pile steadying device, and can be applied even in the field where there is little room for construction space.

Japanese Patent No. 5389602

  However, the conventional steady rest device FD3 has the following problems. First, there is a problem that it is difficult to hold the arc-shaped resin collar 380 on the holding members 350A and 350B. That is, since the block portion 352 has an arc shape, both ends in the circumferential direction of the block portion 352 are angled. For this reason, it is difficult to accurately form the screw holes 352a and 352b with respect to both end portions of the block portion 352 in the circumferential direction. Further, since the second recess 392 and the third recess 393 are also angled, the positions of the fixing member 370 and the screw holes 352a and 352b when the fixing member 370 is assembled to the second recess 392 and the third recess 393. The relationship may be off. As a result, it is difficult to screw the bolt 371 into the screw holes 352a and 352b, and there is room for improvement in the assembling property of the resin collar 380.

  Further, in the conventional steady rest device FD3, since the upper plate portion 351, the block portion 352, and the lower block portion 353 are integrally formed, the shape and size of the first recess 391 are inevitably determined. . For this reason, although the resin collar 380 can be assembled to the first recess 391 by processing performed in advance, there is a high possibility that the iron collar, which has been conventionally used, cannot be assembled to the first recess 391. Therefore, it has been demanded that the user cannot use color members made of different materials and can improve the usability so that an existing iron color can be used.

  Further, in the conventional steady rest device FD3, since it is difficult to hold the resin collar 380 as described above, the first concave portion 391, the second concave portion 392, the third concave portion 393, and the screw holes 352a and 353b are extremely high. It must be molded with dimensional accuracy. For this reason, the processing cost of the part holding the resin-made collar 380 becomes high. Further, in order to prevent the resin collar 380 from being removed, the depth of the first recess 391 needs to have a certain size, and therefore the degree of freedom of the dimension of the resin collar 380 assembled to the first recess 391 is small. . Here, the cylindrical resin material which is the material of the resin collar 380 is relatively expensive, and the market size is determined in advance. Therefore, if the dimensions of the resin collar 380 are determined by design convenience and the arc-shaped resin collar 380 is manufactured from a resin material whose market dimensions are determined, a lot of useless resin material is produced. That is, the yield is poor and the resin collar 380 becomes a very expensive consumable member. As described above, there is a problem that the manufacturing cost of the conventional steady rest device FD3 is high.

  Therefore, the present invention has been made to solve the above-described problems, and can improve the assembling property of the color member, can use a color member of a different material, and further reduce the manufacturing cost. An object of the present invention is to provide a steady rest device for a pile.

  A pile steadying device according to the present invention includes a base member attached to a pile driving machine, a pair of clamping members that are attached to the base member so as to be rotatable in a horizontal direction and sandwich a periphery of a pile extending in the vertical direction, A cross-section is formed in an arc shape, and each collar member is arranged closer to the axial center side of the pile than each holding member, and the pile is in contact with each collar member to suppress horizontal swing of the pile A horizontal upper plate and a horizontal lower plate are detachably attached to the upper and lower sides of each clamping member, and the upper plate and the lower plate are connected to each other from the respective clamping members. An upper projecting piece formed in the inner part of the upper plate and extending in the vertical direction, and a lower side formed in the inner part of the lower plate and extending in the vertical direction. According to the protrusion Te, and wherein the holding sandwich said collar member vertically.

  According to the pile steadying device according to the present invention, the collar member is sandwiched vertically by the upper protruding piece formed on the inner side of the upper plate and the lower protruding piece formed on the inner side of the lower plate. Hold. For this reason, it becomes easy to hold | maintain a color member, and the assembly | attachment property of a color member can be improved. Further, since the upper plate and the lower plate can be attached to and detached from the upper and lower sides of the holding member, the upper plate and the lower plate having various dimensions can be attached to the holding member. Therefore, it is possible to use even color members of different materials by exchanging with upper and lower plates that match the dimensions of the resin collar, or by exchanging with upper and lower plates that match the dimensions of existing iron collars. can do. In other words, an existing iron collar can be used, and usability can be improved.

  Furthermore, since the collar member is sandwiched between the upper and lower projecting pieces, even if the upper projecting piece, the lower projecting piece, the upper plate, and the lower plate are not molded with high dimensional accuracy, The color member can be accurately held. That is, the processing cost of the portion for holding the collar member does not increase. Further, when a resin collar is used as the collar member, for example, an upper plate and a lower plate having various dimensions can be attached to the holding member, so that the degree of freedom of the dimension of the resin collar to be assembled is large. For this reason, the material cost at the time of manufacturing a resin-made color from a resin material can be held down by matching the size of the resin-made color with the vicinity of the market size of a predetermined resin material. Thus, according to the pile steadying device according to the present invention, the manufacturing cost can be greatly reduced as compared with the conventional pile steadying device.

Further, in the steadying device for a pile according to the present invention, an upper step portion having an outer radial end projecting upward is formed on the upper side of the collar member, and an outer radial direction is formed on the lower side of the collar member. A lower step portion with an end projecting downward is formed, the upper protruding piece is locked to the upper step portion, and the lower protruding piece is locked to the lower step portion, The collar member is preferably held.
In this case, when the collar member is assembled to the clamping member, the lower step of the collar member is locked to the lower protrusion of the lower plate with the lower plate attached to the clamping member. The collar member is fitted into the top. Then, the upper plate is attached to the clamping member so that the upper protrusion of the upper plate is locked to the upper step of the collar member. Thus, by using the upper step portion and the lower step portion of the collar member, the collar member can be assembled relatively easily with respect to the clamping member, and the collar member can be firmly held.

Further, in the pile steadying device according to the present invention, the collar member is a resin collar, and the resin collar cuts a curved member having an arc-shaped horizontal section from a cylindrical resin material, and the curved member It is preferable that the upper step portion and the lower step portion are formed by cutting out the upper side and the lower side of the radially inward end portion.
In this case, in excavation work or burial work using a pile driving machine, the pile to be rotated contacts the resin collar, so that the pile can be prevented from being damaged, and the frictional resistance hindering the pile drive is prevented. Can be reduced. Further, the resin collar is manufactured by cutting a curved member from a cylindrical resin material and cutting out the upper side and the lower side of the radially inner end of the curved member. Accordingly, the number of parts to be processed is small, the yield is improved, and the processing cost for manufacturing the resin collar can be reduced.

Further, in the steadying device for a pile according to the present invention, each clamping member is opposed to both ends in the circumferential direction of the collar member at positions on the outer side in the circumferential direction from both ends in the circumferential direction of the collar member. It is preferable that each part is provided.
In this case, the collar member can be positioned in the circumferential direction when the collar member is assembled by the opposing portions provided in each clamping member, and in excavation work or burial work by a pile driving machine, etc. The collar member can be prevented from shifting in the circumferential direction.

  According to the pile steadying device of the present invention, it is possible to improve the assembling property of the collar member, to use a collar member of a different material, and to further reduce the manufacturing cost.

It is the figure which showed the pile driver to which the steadying apparatus of the pile of this embodiment was applied. It is an enlarged view of the steadying apparatus of the pile shown in FIG. It is a top view of the steadying apparatus of the pile shown in FIG. FIG. 4 is a perspective view of a base member and a clamping member shown in FIG. 3. It is a figure for demonstrating the manufacturing process of the resin-made color shown in FIG. It is the figure which showed the steadying apparatus of the pile of the 1st modification. It is a top view of the steadying apparatus of the pile shown in FIG. It is the figure which showed the steadying apparatus of the pile of the 2nd modification. It is a top view of the steadying apparatus of the pile shown in FIG. It is the top view which showed the conventional steadying apparatus of the pile. It is a figure for demonstrating the process of assembling the resin-made collars shown in FIG.

  DESCRIPTION OF EMBODIMENTS An embodiment of a pile steadying device according to the present invention will be described with reference to the drawings. FIG. 1 is a view showing a pile driving machine 1 to which the pile steadying device FD of the present embodiment is applied. As shown in FIG. 1, the pile driving machine 1 includes an upper swing body 2 and a lower traveling body 3, and the upper swing body 2 is rotatably mounted on the lower traveling body 3 that can travel by a crawler. A leader 10 supported by a backstay cylinder 4 is erected in front of the upper swing body 2 (left side in FIG. 1).

  The leader 10 is configured to fall backward from the standing state as the backstay cylinder 4 contracts. An auger 20 as a working device is attached to the front of the leader 10, and a pile steadying device FD (hereinafter simply referred to as “stable device FD”) is attached to the lower end of the leader 10. Yes.

  The auger 20 includes a guide give 21 that sandwiches the guide pipe 11 of the leader 10, and can slide along the guide pipe 11 by the guide give 21. The auger 20 includes a hydraulic motor (not shown) so that the auger 20 can move up and down by itself along the leader 10, and a pinion gear rotated by the hydraulic motor and a rack gear 12 formed on the leader 10 are meshed with each other. Thus, when the hydraulic motor rotates the pinion gear forward and backward, the pinion gear rolls along the rack gear and the auger 20 can move up and down along the leader 10.

  In the pile driving machine 1, the steel pipe pile 30 is attached to the auger 20 when the steel pipe pile 30 is buried. And a pile core is match | combined in the state stood on the ground so that the steel pipe pile 30 may be extended in an up-down direction (vertical direction). After the pile centers are aligned, the lower end of the steel pipe pile 30 is set on the steady rest device FD, and the vertical accuracy of the steel pipe pile 30 is ensured. Thereafter, the steel pipe pile 30 is rotated by being given a rotational torque from the auger 20, and the steel pipe pile 30 is buried by lowering the auger 20 along the leader 10 by the rotational drive of the hydraulic motor.

  Here, as described in the problem to be solved by the invention, the conventional steadying device FD3 is difficult to hold the arc-shaped resin collar 380 on the holding members 350A and 350B, and the assembly of the resin collar 380 is difficult. There was room for improvement in sex. And it was calculated | required that the color member of a different material could be used so that the existing iron color could also be used. Furthermore, the conventional steady rest device FD3 has a problem in that the manufacturing cost is high.

  Therefore, the steady rest device FD of the present embodiment is configured to solve the above-described problems. Hereinafter, the configuration of the steady rest device FD will be described in detail with reference to FIGS. 2 is an enlarged view of the steady rest device FD shown in FIG. 1, and FIG. 3 is a plan view of the steady rest device FD shown in FIG. 2 and 3, the steady rest device FD includes a base member 40, a pair of clamping members 50A and 50B, upper plates 60A and 60B, lower plates 70A and 70B, and a resin collar 80. It has. Here, FIG. 4 is a perspective view of the base member 40 and the clamping member 50A shown in FIG.

  The base member 40 supports the pair of clamping members 50A and 50B so as to be rotatable in the horizontal direction. As shown in FIGS. 2 to 4, the base member 40 is attached to the lower end portion of the reader 10 via a bolt 42 with a vertical portion 41 extending in the vertical direction. The base member 40 is formed with an upper horizontal portion 43 that extends horizontally from the upper side of the vertical portion 41 and a lower horizontal portion 44 that extends horizontally from the lower side of the vertical portion 41. The upper horizontal portion 43 and the lower horizontal portion 44 extend in the vertical direction in FIG. 3 and rotatably support the holding member 50A via the support pin 45 at one end portion (upper end portion in FIG. 3) 43a (44a). The holding member 50B is rotatably supported by the other end portion (lower end portion in FIG. 3) 43b (44b) via the support pin 45.

  As shown in FIG. 3, the sandwiching members 50 </ b> A and 50 </ b> B sandwich the steel pipe pile 30 extending in the vertical direction in a state where the horizontal rotation is restricted. The configuration of the clamping member 50A and the configuration of the clamping member 50B are symmetrical in the vertical direction in FIG. 3, and are substantially the same. For this reason, each component of the holding member 50A will be described as a representative, and each component of the holding member 50B will be denoted by the same reference numeral as each component of the holding member 50A, and description thereof will be omitted.

  The sandwiching member 50A includes an upper curved portion 51 and a lower curved portion 52 that are curved in a bow shape, and the upper curved portion 51 and the lower curved portion 52 are arranged in parallel. The upper curved portion 51 has a thin plate shape and can be rotated in the horizontal direction with the base end portion (right end portion in FIG. 3) 51a as a fulcrum, and the insertion hole 51b1 is formed in the distal end portion 51b (left end portion in FIG. 3). Have. Similarly, the lower curved portion 52 is also formed in a thin plate shape, and can be rotated in the horizontal direction with a base end (not shown) side as a fulcrum. As shown in FIG. 4, an insertion hole 52b1 is provided in the distal end portion 52b. Have.

  Thus, as shown in FIG. 3, when the steel pipe pile 30 is set in the steady rest device FD, the distal end portions 51b of the upper curved portions 51 of the sandwiching members 50A and 50B are overlapped with each other and the lower curved portion 52 is overlapped. The front end portions 52b are overlapped with each other. Then, the fixing pin 52P is inserted through the insertion holes 51b1 and 52b1. Thereby, horizontal rotation of each clamping member 50A, 50B is controlled, and the steel pipe pile 30 will be clamped by each clamping member 50A, 50B.

  Further, as shown in FIG. 4, the holding member 50 </ b> A has both end portions 80 c in the circumferential direction of the resin collar 80 at positions on the outer side in the circumferential direction from both end portions 80 c and 80 d in the circumferential direction of the resin collar 80 to be described later. Plate members (opposing portions) 53a and 53b that face 80d are provided. The plate members 53a and 53b position the resin collar 80 in the circumferential direction and prevent the resin collar 80 from shifting in the circumferential direction. These plate members 53a and 53b are fixed to the holding member 50A in a standing state by welding or the like. The facing portion of the resin collar 80 is not limited to the plate-like plate materials 53a and 53b, and may be, for example, a protrusion, and the shape of the facing portion can be changed as appropriate.

  As shown in FIG. 4, the upper plate 60A and the lower plate 70A hold the resin collar 80 on the holding member 50A side, and the upper plate 60B and the lower plate 70B are made of resin on the holding member 50B side. The color 80 is held. The configurations of the upper plate 60A and the lower plate 70A and the configurations of the upper plate 60B and the lower plate 70B are symmetrical in the vertical direction in FIG. 3, and are substantially the same. Therefore, each component of the upper plate 60A and the lower plate 70A will be described as a representative, and each component of the upper plate 60B and the lower plate 70B is the same as each component of the upper plate 60A and the lower plate 70A. The description is abbreviate | omitted and attached | subjected.

  As shown in FIG. 3, the upper plate 60 </ b> A is a plate that is formed in a horizontal and circular arc shape, and is attachable to and detachable from the upper curved portion 51 of the holding member 50 </ b> A via bolts 61 and nuts 62 (see FIG. 2). Installed on. The upper plate 60 </ b> A is disposed outside the steel pipe pile 30 and in a range of about 150 degrees in the circumferential direction of the steel pipe pile 30, and from the upper curved portion 51 to the axial center O1 side (inward radial direction side) of the steel pipe pile 30. It has an inner part 60a that protrudes into the area. And the upper side protrusion 60b extended in an up-down direction is formed in the circular arc shaped inner part 60a. The upper projecting piece 60b is provided in a range of about 150 degrees in the circumferential direction, and is engaged with the upper step portion 80U of the resin collar 80 as will be described later.

  The lower plate 70A has the same configuration as the upper plate 60A described above. That is, the lower plate 70A is a plate that is formed in a horizontal and circular arc shape, and is detachably attached to the lower curved portion 52 of the clamping member 50A via bolts 71 and nuts 72 (see FIG. 2). ing. The lower plate 70 </ b> A is disposed outside the steel pipe pile 30 and in a range of about 150 degrees in the circumferential direction of the steel pipe pile 30, and from the lower curved portion 52 to the axial center O <b> 1 side (inward radial direction). The inner part 70a protrudes to the side). The arc-shaped inner portion 70a is formed with a lower protruding piece 70b extending in the vertical direction. The lower projecting piece 70b is provided in a range of about 150 degrees in the circumferential direction, and is engaged with the lower step portion 80D of the resin collar 80 as will be described later.

  The resin collar 80 is held by the upper plate 60A and the lower plate 70A arranged on the holding member 50A side, and is held by the upper plate 60B and the lower plate 70B arranged on the holding member 50B side. is there. Hereinafter, the resin collar 80 held by the upper plate 60A and the lower plate 70A will be described as a representative. The resin collar 80 directly contacts the rotating steel pipe pile 30. In this embodiment, MC nylon (registered trademark) is used as a material excellent in wear resistance and slidability.

  Here, FIG. 5 (A) shows a plan view of the resin collar 80 shown in FIG. 4, and FIG. 5 (B) shows a cross-sectional view along the line AA in FIG. As shown in FIGS. 5 (A) and 5 (B), the resin collar 80 is a member whose horizontal cross section is formed in an arc shape, and as shown in FIG. Is arranged on the axial center O1 side (inward radial direction side). The resin collar 80 is disposed outside the steel pipe pile 30 in a range of about 150 degrees in the circumferential direction of the steel pipe pile 30. As shown in FIG. 5 (B), an upper step 80U in which the radially outer end 80a protrudes upward is formed on the upper side of the resin collar 80, and the outer diameter of the resin collar 80 is on the lower side. A lower stepped portion 80D in which the direction end portion 80a protrudes downward is formed.

  Next, a procedure for assembling the resin collar 80 to the upper plate 60A and the lower plate 70A will be described. First, the fixing pin 52P is removed from the insertion holes 51b1 and 52b1, and the holding members 50A and 50B are allowed to rotate in the horizontal direction. The lower plate 70A is attached to the lower curved portion 52 with bolts 71 and nuts 72, and the upper plate 60A is removed from the upper curved portion 51. In this state, the resin collar 80 is fitted so that the lower step portion 80D of the resin collar 80 is engaged with the lower protrusion 70b of the lower plate 70A (see FIGS. 2 and 3). Thereby, the lower side of the radially outer end 80a of the resin collar 80 is caught by the lower plate 70A and positioned.

  Thereafter, the upper plate 60A is attached to the upper curved portion 51 with bolts 61 and nuts 62 while the upper protrusion 60b of the upper plate 60A is hooked so as to be locked to the upper step portion 80U of the resin collar 80. As a result, the resin collar 80 is sandwiched between the upper and lower protrusions 60b and 70b so as not to be easily removed. Thus, by using the upper step portion 80U and the lower step portion 80D of the resin collar 80, the resin collar 80 can be assembled relatively easily, and the resin collar 80 can be firmly held. it can. Since the procedure for assembling the resin collar 80 to the upper plate 60B and the lower plate 70B is the same, the description thereof is omitted.

  Then, the steadying of the steel pipe pile 30 by the steadying apparatus FD is demonstrated. As described above, after the resin collar 80 is assembled, the fixing pin 52P is inserted into the insertion holes 51b1 and 52b1 in order to restrict the horizontal rotation of the holding members 50A and 50B. In this way, the lower end portion of the steel pipe pile 30 is sandwiched between the sandwiching members 50A and 50B, and is set in the steady rest device FD. At this time, as shown in FIG. 3, the pair of resin collars 80 is arranged in a range of about 300 degrees in the circumferential direction around the steel pipe pile 30. In the present embodiment, the diameter D1 of the steel pipe pile 30 is 318.5 mm, whereas the inner diameter E1 of the resin collar 80 is 328 mm.

  Thus, when the steel pipe pile 30 is rotationally driven by the auger 20 during excavation work or embedding work, the steel pipe pile 30 contacts the end face 80b1 of the radially inner end 80b (see FIG. 5B) of the resin collar 80. Touch. Thereby, the horizontal runout of the steel pipe pile 30 is suppressed. At this time, in this embodiment, since the collar member (resin collar 80) that is in contact with the steel pipe pile 30 is composed of MC nylon (registered trademark) having excellent wear resistance and sliding property, the steel pipe pile While being able to prevent 30 from being damaged, the frictional resistance which prevents the rotational drive of the steel pipe pile 30 can be reduced. Further, as shown in FIG. 4, the plate members 53a and 53b of the holding members 50A and 50B are opposed to the circumferential end portions 80c and 80d of the resin collar 80. The resin collar 80 can be prevented from shifting in the circumferential direction due to vibration.

  By the way, in the steady rest device FD of the present embodiment, the upper plates 60A and 60B are detachably attached to the upper curved portions 51 of the holding members 50A and 50B, and the lower plates 70A and 70B are attached to and detached from the lower curved portion 52. It is characterized by being mounted as possible. That is, the upper plates 60A and 60B and the lower plates 70A and 70B are for assembling the resin collar 80, but the upper plates 60A and 60B and the lower plates 70A and 70B are detachable, so The plate and the lower plate can be changed to ones having different dimensions, and the collar member assembled to the upper plate and the lower plate can be changed to ones having different dimensions. Hereinafter, this feature will be described with reference to a first modification and a second modification of the steady rest device FD.

  FIG. 6 is a view showing a pile steadying device FD1 of a first modification, and FIG. 7 is a plan view of the pile steadying device FD1 shown in FIG. As shown in FIGS. 6 and 7, the steady rest device FD1 of the first modified example has the same configuration as the steady rest device FD of the present embodiment described above, except that the upper plate, the lower plate, and the resin collar are different. It is.

  Therefore, in the steady rest device FD1 of the first modification, the same components as those of the steady rest device FD are denoted by the same reference numerals and description thereof is omitted. The upper plates 160A and 160B, the lower plates 170A and 170B, and the resin collar 180 of the first modified example are different in size, except for the upper plates 60A and 60B, the lower plates 70A and 70B, and the resin of the present embodiment. Since the configuration is the same as that of the collar 80, the same reference numerals are assigned to the same components and the description thereof is omitted.

  In the first modification, the steadying of the steel pipe pile 130 different from that of the present embodiment is performed. That is, the diameter D2 of the steel pipe pile 130 of the first modified example is 355.6 mm unlike the diameter D1 of the steel pipe pile 30 described above. Thus, when changing the steel pipe pile 30 to the steel pipe pile 130 and performing steadying, it can respond flexibly by changing from the steadying apparatus FD to the steadying apparatus FD1.

  That is, with respect to the steady rest device FD of the present embodiment described above, the fixing pin 52P is removed from each of the insertion holes 51b1 and 52b1 so that the horizontal rotation of the holding members 50A and 50B is allowed. Then, the upper plates 60A and 60B are removed from the upper curved portion 51, the lower plates 70A and 70B are removed from the lower curved portion 52, and the resin collar 80 is removed from the holding members 50A and 50B. Next, the lower plates 170 </ b> A and 170 </ b> B of the first modification are attached to the lower curved portion 52 with bolts 71 and nuts 72. Lower plate 170A, 170B is a plate formed in circular arc shape so that it may become a diameter slightly larger than diameter D2 of the steel pipe pile 130 of a 1st modification.

  Subsequently, the resin collar 180 is fitted so that the lower step portion 180D of the resin collar 180 of the first modification is locked to the lower protrusions 170b of the lower plates 170A and 170B. The resin collar 180 of the first modification has a horizontal cross section formed in an arc shape so as to be slightly larger than the diameter D2 of the steel pipe pile 130 of the first modification, and the inner diameter E2 is 361 mm. It has become. Thereafter, the upper plates 160A and 160B are attached to the upper curved portion 51 with bolts 61 and nuts 62 while the upper protrusions 160b of the upper plates 160A and 160B are hooked so as to be engaged with the upper stepped portion 180U of the resin collar 180. In this way, the assembly of the resin collar 180 of the first modification is completed.

  As can be seen from the above description, since the upper plates 160A and 160B and the lower plates 170A and 170B having different dimensions can be attached, the degree of freedom of the dimension of the collar member to be assembled is increased, and steel pipe piles having different dimensions are also set. can do. That is, if the dimensions of the upper plate and the lower plate are changed in accordance with the diameter of the steel pipe pile to be set, a certain degree of freedom can be given to the dimension of the collar member, and the collar member of various dimensions is assembled. be able to. Actually, in the steady rest device FD1 of the first modified example, the diameter D2 of the resin collar 180 is the same as the diameter (361 mm) of the existing iron collar, and it is also possible to assemble the iron collar that has been used conventionally. Can do. Therefore, it is possible to use a color member made of a different material depending on the user, and the usability is improved so that an existing iron color can be used.

  FIG. 8 is a view showing a pile steadying device FD2 of a second modification, and FIG. 9 is a plan view of the pile steadying device FD2 shown in FIG. As shown in FIGS. 8 and 9, the steady rest device FD2 of the second modified example has the same configuration as the steady rest device FD of the present embodiment described above, except that the upper plate, the lower plate, and the resin collar are different. It is. Therefore, in the steady rest device FD2 of the second modified example, the same components as those of the steady rest device FD are denoted by the same reference numerals and description thereof is omitted. Further, the resin collar 280 of the second modified example has the same configuration as that of the resin collar 80 of the present embodiment except that the dimensions are different. Therefore, the same components are denoted by reference numerals in the 200s. Is omitted.

  In the 2nd modification, steadying of the steel pipe pile 230 different from this embodiment is performed. That is, the diameter D3 of the steel pipe pile 230 of the second modified example is 139.8 mm unlike the diameter D1 of the steel pipe pile 30 described above. Thus, even if it is a case where it changes from the steel pipe pile 30 to the comparatively thin steel pipe pile 230 and performs steadying, it can respond flexibly by changing from steadying device FD to steadying device FD2. .

  That is, in the second modification, the upper plates 260A and 260B are configured by the arc-shaped first upper plate 261 and the arc-shaped second upper plate 262 so as to correspond to the relatively thin steel pipe pile 230. . The first upper plate 261 is attached to the upper curved portion 51 with bolts 61 and nuts 62, like the upper plate 60 of the present embodiment described above.

  The second upper plate 262 is disposed on the axial center O1 side (inward radial direction side) of the steel pipe pile 230 from the first upper plate 261, and is attached to the first upper plate 261 with bolts 263 and nuts (not shown). ing. As shown in FIG. 8, the second upper plate 262 has an upper protruding piece 262b on the inner side 262a on the radially inward side, like the upper plate 60 of the present embodiment described above. The upper protruding piece 262b extends in the vertical direction and is engaged with the upper step 280U of the resin collar 280.

  Similarly, the lower plates 270 </ b> A and 270 </ b> B are configured by an arc-shaped first lower plate 271 and an arc-shaped second lower plate 272. The first lower plate 271 is attached to the lower curved portion 52 with bolts 71 and nuts 72, like the lower plate 70 of the present embodiment described above.

  The second lower plate 272 is disposed closer to the axial center O1 side (the radially inward side) of the steel pipe pile 230 than the first lower plate 271, and the first lower plate 271 is configured with bolts 273 and nuts (not shown). Installed on. As shown in FIG. 8, the second lower plate 272 includes a lower protrusion 272b on the inner side 272a on the radially inward side, like the lower plate 70 of the present embodiment described above. The lower protrusion 272b extends in the vertical direction and is engaged with the lower step 280D of the resin collar 280. The resin collar 280 of the second modification has a horizontal cross section formed in an arc shape so as to be slightly larger than the diameter D3 of the steel pipe pile 230 of the second modification, and the inner diameter E3 is 150 mm. ing.

  Thus, in the steady rest device FD2 of the second modified example, the first upper plate 261 and the second upper plate 262 are detachably attached, and the first lower plate 271 and the second lower plate 272 are detachably attached. Thus, even the resin collar 280 having a relatively small diameter can be held, and the steel pipe pile 230 can be prevented from shaking. That is, by changing the quantity of the upper and lower plates to be attached and detached according to the diameter of the steel pipe pile to be set, it is possible to assemble the collar members of various dimensions, and to prevent the steel pipe piles of various diameters from steadying. It can be carried out.

  Next, the manufacturing cost of the steady rest apparatus FD of this embodiment is demonstrated compared with the conventional steady rest apparatus FD3 (refer FIG.10 and FIG.11). In the conventional steady rest device FD3, as explained in the problem to be solved by the invention, since it is difficult to hold the resin collar 380, it is necessary to mold the portion holding the resin collar 380 with high dimensional accuracy. This increases the processing cost.

  Further, as shown in FIG. 11A, the upper plate portion 351, the block portion 352, and the lower plate portion 353 are not structured so as to be disassembled, and are integrally formed, and the resin collar 380 is assembled and fixed. The structure for achieving this must be formed with extremely high dimensional accuracy on a surface having an angle with the fixing member 370, the bolt 371, and the lower plate portion 353, resulting in an increase in cost. Further, the degree of freedom of the dimension of the resin collar 380 is low and must be determined according to design convenience, and a lot of useless resin material is produced when the resin collar 380 is manufactured. Further, since the resin collar 380 is fitted into the first recess 391 and sandwiched and held by the fixing member 370 from the circumferential direction, the resin collar 380 has a thickness in the radial direction in order to hold the resin collar 380 accurately. It must be large enough. Therefore, in the resin collar 380, the thickness in the radial direction must be more than necessary, and the resin collar 380 becomes a very expensive consumable member.

  On the other hand, in the steady rest device FD of the present embodiment, as described above, the resin plate 80 is sandwiched between the upper projecting piece 61b and the lower projecting piece 71b, so that the resin plate 80 is easily held. That is, the resin plate 80 can be accurately held without molding a portion for holding the resin collar 80 with high dimensional accuracy as in the conventional steady rest device FD. As a result, the processing cost of the portion for holding the resin collar 80 can be kept low.

  Further, since the upper plates 60A and 60B and the lower plates 70A and 70B are detachable, it is possible to prepare upper and lower plates having various dimensions. For this reason, it is not necessary to determine the dimension of the resin collar for design convenience, and the degree of freedom of the dimension of the resin collar to be assembled is great. As a result, in the resin collar 80 of the present embodiment, the size of the cylindrical resin material (MC nylon (registered trademark)) 80X (see FIG. 5A) distributed in the market is as follows. Can be manufactured. In addition, the resin material 80X is a comparatively expensive thing, and is a commercial item by which the market dimension is determined beforehand.

  First, as shown in FIG. 5A, a resin material 80X having a diameter close to the diameter D1 of the resin collar 80 is prepared. Next, two arc-shaped bending members 80 are cut out from the cylindrical resin material 80X within a range of about 150 degrees in the circumferential direction, and as shown in FIG. The upper side and the lower side of the portion 80b are cut out by machining or the like. As a result, the upper step 80U and the lower step 80D are formed, and the resin collar 80 described above is manufactured.

  Thus, the resin collar 80 of the present embodiment can be easily manufactured from the resin material 80X distributed in the market. In other words, the bending member 80 is cut from the resin material 80X, and the upper and lower sides of the radially inner end 80b of the bending member 80 are cut out. Therefore, there are few parts to be processed, and as much wasteful resin material as possible is prevented. As a result, the yield is good and the material cost for producing the resin collar 80 can be reduced. Since the upper plates 60A and 60B and the lower plates 70A and 70B are designed according to the diameter D1 of the resin collar 80 to be manufactured, there is no problem in the assembling property of the resin collar 80.

  Further, in the steady rest device FD of the present embodiment, the resin collar 80 is vertically sandwiched between the upper projecting piece 61b and the lower projecting piece 71b, so that the resin collar 80 is accurately provided as in the conventional steady rest device FD3. Therefore, it is not necessary to sufficiently increase the thickness of the resin collar 80 in the radial direction. That is, the resin collar 80 may be provided with a thickness that can achieve the effect of steadying the steel pipe pile 30. Therefore, compared to the resin collar 380 of the conventional steady rest device FD3, the radial thickness of the resin collar 80 can be reduced, and the cost of the resin collar 80 itself can be reduced. As described above, in this embodiment, the processing cost of the portion for holding the resin collar 80 and the cost of the resin collar 80 can be reduced as compared with the conventional steady rest device FD3, and the steady rest device FD itself. The manufacturing cost can be greatly reduced.

The effect of this embodiment is demonstrated.
According to the steady rest device FD of this embodiment, the resin collar 80 is sandwiched and held by the upper protrusions 61b of the upper plates 60A and 60B and the lower protrusions 71b of the lower plates 70A and 70B. . For this reason, it becomes easy to hold | maintain the resin-made collar 80, and the assembly | attachment property of the resin-made collar 80 can be improved.

  Further, since the upper plates 60A and 60B and the lower plates 70A and 70B are detachable from the holding members 50A and 50B, the first modification shown in FIGS. 6 and 7 and the second modification shown in FIGS. 8 and 9 are used. As an example, various sized upper and lower plates can be attached to the clamping members 50A, 50B. Therefore, it is possible to use even color members of different materials by exchanging with upper and lower plates that match the dimensions of the resin collar, or by exchanging with upper and lower plates that match the dimensions of existing iron collars. can do. In other words, an existing iron collar can be used, and usability can be improved.

  Further, since the resin collar 80 is vertically sandwiched between the upper protruding piece 61b and the lower protruding piece 71b, the upper protruding piece 61b, the lower protruding piece 71b, the upper plates 60A and 60B, and the lower plates 70A and 70B. Even if it is not molded with high dimensional accuracy, the resin collar 80 can be accurately held. That is, unlike the conventional steady rest device FD3, the processing cost of the portion for holding the resin collar 80 does not increase. Moreover, the material cost at the time of manufacturing the resin collar 80 from the resin material 80X can be suppressed by adjusting the dimension of the resin collar 80 to the vicinity of the market size of the resin material 80X determined in advance. Thus, according to the steady rest device FD of the present embodiment, the manufacturing cost can be significantly reduced as compared with the conventional steady rest device FD3.

As mentioned above, although embodiment of the steadying apparatus of the pile concerning this invention was described, this invention is not limited to this embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in this embodiment, the resin collar 80 is made of MC nylon (registered trademark), but the collar member may be made of other resins. The collar member may be an iron collar, and may be made of a material having self-lubricating properties as a material that does not damage the pile.

As shown in the second modification of the present embodiment, the upper plate 260 is composed of two plates (first upper plate 261 and second upper plate 262), and the lower plate 270 is composed of two plates (first plate). Although the lower plate 271 and the second lower plate 272) are configured, the upper plate may be configured by three or more plates, and the lower plate may be configured by three or more plates.
In addition, each dimension demonstrated by this embodiment is each dimension shown as an example to the last, Comprising: According to the kind and magnitude | size of the pile driver 1, it can change suitably.

1 Pile driver 30, 130, 230 Steel pipe pile 40 Base members 50A, 50B Holding members 53a, 53b Plate members 60A, 160A, 260A Upper plates 60B, 160B, 260B Upper plates 60a, 160a, 262a Inner portions 60b, 160b, 262b Upper side Projection piece 70A, 170A, 270A Lower plate 70B, 170B, 270B Lower plate 70a, 170a, 272a Inner portion 70b, 170b, 272b Lower projection piece 80, 180, 280 Resin collar 80U, 180U. 280U Upper step 80D, 180D, 280D Lower step 80X Resin material O1 Axis center

Claims (4)

A base member attached to the pile driver,
A pair of clamping members that are attached to the base member so as to be rotatable in the horizontal direction and sandwich the periphery of a pile extending in the vertical direction;
Each horizontal member is formed in a circular arc shape and each collar member disposed on the axial center side of the pile from each holding member,
In the steadying device of the pile that suppresses the horizontal shake of the pile by the pile coming into contact with each collar member,
A horizontal upper plate and a horizontal lower plate are detachably attached to the upper and lower sides of each clamping member,
The upper plate and the lower plate have arc-shaped inner portions that protrude from the respective clamping members to the axial center side of the pile,
The collar member is sandwiched and held up and down by an upper protruding piece that extends in the vertical direction formed on the inner side of the upper plate and a lower protruding piece that extends in the vertical direction formed on the inner side of the lower plate. Pile steadying device characterized by In the pile steadying device according to claim 1,
On the upper side of the collar member, an upper step is formed with the radially outer end projecting upward.
On the lower side of the collar member, a lower stepped portion is formed with a radially outward end projecting downward,
An anti-swaying of a pile, wherein the collar member is held by the upper projecting piece being engaged with the upper step portion and the lower projecting piece being engaged with the lower step portion. apparatus. In the pile steadying device according to claim 2,
The collar member is a resin collar,
The resin collar is formed by cutting a curved member having an arcuate horizontal cross section from a cylindrical resin material, and cutting the upper and lower sides of the radially inward end of the curved member. steady rest piles, characterized in that at those manufacturing to form a stepped portion. In the pile steadying device according to any one of claims 1 to 3,
Each said clamping member is provided with the opposing part which each opposes the both ends of the circumferential direction of the said collar member in the position of the circumferential direction outer side from the both ends of the circumferential direction of the said collar member, The pile characterized by the above-mentioned Steady rest device.

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