JP6289911B2 - Pile driver - Google Patents

Description

  The present invention relates to a pile driving machine in which a master rope pole extending in the vertical direction is attached to the leader in a state where the leader is tilted in the horizontal direction, and in particular, the master rope is attached to a guide pipe or a ladder fixed to the leader. Related to pile driver.

  In the pile driving machine, the upper revolving unit is mounted so as to be able to turn with respect to the lower traveling unit, and the leader is attached to the upper revolving unit so as to be raised and lowered. In the case of a large pile driver, the pile driver is disassembled into an upper swing body, a lower traveling body, and a leader for easy transport, and the long leader is disassembled into a plurality of leader members. Each disassembled member is transported to the work site by a trailer or the like and assembled at the work site.

  The following Patent Document 1 describes an assembly work of a reader. When assembling the leader, the leader member attached to the upper swing body is tilted in the horizontal direction, and the leader member for extension is sequentially connected to the leader member. Specifically, as shown in FIG. 14, a flange 131a formed at the end of one leader member 130A and a flange 131b formed at the end of the other leader member 130B are connected using bolts and nuts. Link. Thereafter, the wire rope is bridged over the top sheave of the leader 130, the tip of the backstay is connected to the leader at the intermediate portion, and a hydraulic hose is disposed.

  By the way, when assembling the leader or disassembling the leader, an operator may get on the upper side of the leader members 130A and 130B and work at a height of 2 m or more from the ground. In this case, the worker must secure the safety belt by hooking the safety belt on the master rope 100. Therefore, in Patent Document 1 below, a master rope 150 extending in the vertical direction is attached to a fixing member 135 fixed to a ladder 134. The master rope 100 is bridged between the master rope poles 150 through the master rope receiver 151 fixed to the master rope pole 150.

  Here, a conventional parent rope mounting structure by the applicant will be described with reference to FIGS. 15 and 16. As shown in FIGS. 15 and 16, the fixing member 170 for attaching the master rope 150 includes a screw seat 171, a bracket 172, and a hollow pipe 173. The screw seat 171 is fixed to the side surface 130a of the leader member 130C by welding. The bracket 172 is attached to the screw seat 171 via a bolt 174. The hollow pipe 173 is fixed to the bracket 172 and is inserted through the lower end 150 a of the parent rope 150. A retaining pin 175 is attached to the hollow pipe 173 and the lower end portion 150 a of the master rope 150 to hold the master rope 150.

JP 2012-97412 A

  However, the above-described parent rope mounting structure has the following problems. First, the fixing member 170 described above is optionally attached to the side surface 130a of the reader 130C according to the user's request, and the screw seat 171 must be welded when attaching. For this reason, there is a problem that a remodeling process is required to attach the master rope 150 and the cost increases. Further, since the fixing member 170 remains fixed to the side surface 130a of the reader 130C, the master rope 150 can be attached only at the position of the fixing member 170. Therefore, when it is desired to change or increase the attachment position of the master rope 150, a remodeling process for attaching the fixing member 170 is required again, and a flexible response cannot be achieved.

  Therefore, the present invention has been made to solve the above-described problems, and provides a pile driving machine capable of attaching the master rope pole at an arbitrary position in the longitudinal direction of the leader without increasing the cost. With the goal.

  In the pile driving machine according to the present invention, a leader pipe formed by connecting a plurality of leader members is attached to the upper swing body so as to be able to undulate, and a guide pipe that extends in the same direction as the leader and raises and lowers the work device A ladder having a vertical member extending in the vertical direction and a horizontal member extending in the horizontal direction is fixed to the reader and is extended in the vertical direction while being fixed to the reader and the reader is tilted. A pole is attachable to the leader, and is provided with a pole attachment member that holds a lower end portion of the master rope. The pole attachment member is detachably attached to the ladder or the guide pipe. It is characterized by.

  According to the pile driver according to the present invention, the pole mounting member that holds the lower end portion of the master rope is detachably attached to the ladder or the guide pipe. For this reason, only when the master rope is attached to the leader, the pole attaching member may be attached to the ladder or the guide pipe, and the pole attaching member is not fixed to the leader. Therefore, the modification process (welding) for attaching the master rope is unnecessary, and the master rope can be attached to the reader without increasing the cost. Moreover, since the pole mounting member can be attached and detached, it is possible to flexibly cope with changing or increasing the mounting position of the parent rope.

In the pile driving machine according to the present invention, the pole mounting member includes a vertical member engaging portion that engages with the vertical member of the ladder, and a horizontal member engaging portion that engages with the horizontal member of the ladder. It is preferable.
In this case, the pole mounting member is engaged with both the vertical member and the horizontal member of the ladder by utilizing the fact that the vertical member and the horizontal member of the ladder are T-shaped. Thereby, the pole mounting member can be mounted in a stable state.

Further, in the pile driving machine according to the present invention, the horizontal member engaging portion of the pole mounting member is rotatably assembled around the horizontal member, and the vertical member engaging portion of the pole mounting member is It is preferable that the vertical member is sandwiched to restrict movement and rotation in the left, right, up, down, front and rear directions around the horizontal member by the pole mounting member.
In this case, when the pole attachment member is attached to the ladder, the transverse member engaging portion is first assembled so as to be rotatable around the transverse member of the ladder. Next, the vertical member engaging portion sandwiches the vertical member of the ladder, and the movement and rotation of the pole mounting member around the horizontal member around the horizontal member is controlled. In this way, the pole mounting member can be easily mounted on the ladder.

Further, in the pile driving machine according to the present invention, the guide pipe has a rectangular cross section and has an upper surface, a lower surface, a left side surface, and a right side surface, and the post mounting member is disposed on the upper surface and the lower surface of the guide pipe. A vertical engagement portion sandwiched in the vertical direction and a lateral engagement portion sandwiched in the left-right direction with respect to the left side surface and the right side surface of the guide pipe.
In this case, utilizing the fact that the cross section of the guide pipe is rectangular, the guide pipe is sandwiched from the vertical direction and the horizontal direction by the pole mounting member. Thereby, the pole mounting member can be mounted in a stable state.

  According to the pile driving machine of the present invention, the pole mounting member that holds the lower end portion of the parent rope is detachably mounted on a ladder or a guide pipe that is an existing component member. For this reason, the master rope can be attached at any position in the longitudinal direction of the leader without increasing the cost.

It is the front view which showed the pile driver of 1st Embodiment. It is the figure which expanded the A section of FIG. It is sectional drawing along the BB line of FIG. (A) It is sectional drawing along CC line of FIG. (B) It is sectional drawing along the DD line | wire of FIG. (A) It is an enlarged view of the master rope and the pole attachment member shown in FIG. (B) It is the side view which looked at FIG. 5 (A) from the right side. (A) It is the figure which showed the state which engaged the recessed part of the vertical plate with the lower horizontal pipe of the ladder. (B) It is the figure which showed the state which rotated the vertical plate around the lower side pipe. It is the front view which showed the pile driver of 2nd Embodiment. It is sectional drawing along the EE line of FIG. It is the side view which looked at FIG. 8 from the right side. It is sectional drawing along the FF line of FIG. (A) It is an enlarged view of the cylindrical pipe, the support plate, the L-shaped plate, the L-shaped mounting piece, and the fixed plate shown in FIG. (B) It is the side view which looked at FIG. 11 (A) from the right side. (C) It is a top view of FIG. 11 (B). (A) It is an enlarged view of the master rope shown in FIG. (B) It is the side view which looked at FIG. 12 (A) from the right side. It is an enlarged view of the rotating plate shown in FIG. It is a perspective view for demonstrating the assembly operation | work of a reader in the past. It is a front view for demonstrating the attachment structure of the conventional parent rope pole by this applicant. It is the side view which looked at FIG. 15 from the right side.

  An embodiment of a pile driver according to the present invention will be described with reference to the drawings. Drawing 1 is a front view showing pile driver 1 of this embodiment. As shown in FIG. 1, in the pile driving machine 1, the upper turning body 10 is mounted so as to be turnable with respect to the lower traveling body 20. And the leader 30 is attached to the front bracket 11 provided in the front side (left side of FIG. 1) of the upper revolving structure 10 so that raising / lowering is possible. FIG. 1 shows a state in which the reader 30 is tilted in the horizontal direction. The pile driving machine 1 is a device in which a steel pipe pile (not shown) is rotated by an auger 40 while the leader 30 stands in a vertical direction, and is pushed into the ground.

  The upper swing body 10 has a driver's cab for performing a driving operation, and also has an equipment room 12 in which an engine and a hydraulic unit are accommodated. The upper swing body 10 is provided with a backstay 13 that supports the leader 30 from the rear side (right side in FIG. 1) in a state where the leader 30 stands. Moreover, in order to stabilize the attitude | position of the pile driving machine 1, the outrigger 14 comprised with a hydraulic jack is provided in the lower side of the upper and lower revolving body 10 in the front, rear, left and right sides. The lower traveling body 20 travels by a crawler 21 and supports the upper revolving body 10 via a bearing 22 so as to be rotatable.

  The leader 30 extends linearly and is formed by connecting a plurality of leader members 30A, 30B, 30C, 30D. A flange 31 is formed at the end of each of the leader members 30A to 30D, and the flanges 31 of the adjacent leader members 30A to 30D are connected using bolts and nuts. 1 is rotatably assembled to the leader member 30A via the bracket 15, and can be connected to the leader member 30A by contraction of a hydraulic cylinder (not shown). A guide pipe 32 extending in the same direction as the leader 30 is fixed to the leader 30. The guide pipe 32 is fixed to the side surfaces 30a and 30b of the leader members 30A to 30E as a pair (see FIG. 3), and the lifting device 41 of the auger 40 is assembled to be movable along the leader 30.

  The auger 40 has an elevating device 41 assembled to the leader 30 (leader member 30E), and a rotation driving device 42 for rotating the steel pipe pile. The elevating device 41 includes a pinion gear that can mesh with a rack formed on the leader 30 (each of the leader members 30A to 30E) and a hydraulic motor that rotationally drives the pinion gear. For this reason, when the hydraulic motor is driven to rotate, the pinion gear rotates, and the auger 40 moves (lifts) along the leader 30. The mechanism for raising and lowering the auger 40 along the reader 30 is not limited to the rack and pinion type described above. For example, the auger 40 may be moved up and down along the leader 30 by spanning a chain connected to the lifting device 41 over a sprocket provided in the leader 30 and rotating the sprocket with a hydraulic motor.

  By the way, when transporting the pile driving machine 1 to the work site, it is disassembled into the upper turning body 10, the lower traveling body 20, and the leader 30, and the long leader 30 is disassembled into a plurality of leader members 30A to 30D. . Then, each disassembled member is transported to the work site by a trailer or the like and assembled at the work site. Here, when assembling the leader 30, an operator gets on the upper side of each leader member 30A to 30D, fastens the flanges 31 with bolts and nuts, bridges the wire rope to the top sheave 33 of the leader 30, The tip of the backstay 13 is connected to the bracket of the leader member 30A, and operations such as the arrangement of the hydraulic hose are performed.

  At this time, since the worker works at a height of 2 m or more from the ground, a safety belt hook is hung on the master rope 100 (see FIG. 14) spanned between the master rope poles 50 for safety. Secured. Thus, in the pile driving machine 1, when assembling the leader 30 or disassembling the leader 30, the master rope 50 extending in the vertical direction is attached in a state where the leader 30 is tilted. However, as described in the problem to be solved by the invention, the conventional parent rope mounting structure by the applicant requires a modification process such as welding the screw seat 171 (see FIG. 16). There was a problem that the cost increased. Furthermore, when it is desired to change or increase the attachment position of the master rope 50, a remodeling process for attaching the fixing member 170 is required again, and a flexible response cannot be achieved.

  Therefore, in this embodiment, the pole attachment member 60 that can solve the above-described problems is attached to the lower end portion 50 a of the master rope 50. The pole attachment member 60 is attached to a ladder 34 that is fixed in advance to the leader 30 (leader members 30A, 30C, 30D). Here, before describing the pole mounting member 60, the ladder 34 will be described. 2 is an enlarged view of portion A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 3, the ladder 34 is fixed to the side surfaces 30 a and 30 b of the leader member 30 </ b> C via horizontal mounting plates 35. The ladder 34 is for the worker to move up and down while the leader 30 is standing. For this reason, the operator can perform maintenance and inspection on the working device such as the auger 40 by moving the ladder 34 up and down. The ladder 34 includes a cylindrical vertical pipe 34a extending in the vertical direction, an upper horizontal pipe 34b connected to the upper end of the vertical pipe 34a, and a lower end of the vertical pipe 34a in a state where the leader 30 is tilted horizontally. And a lower lateral pipe 34c connected to the lower side pipe 34c. The vertical pipe 34b corresponds to the “vertical member” of the present invention, and the upper horizontal pipe 34b and the lower horizontal pipe 34c correspond to the “horizontal member” of the present invention.

  As shown in FIG. 2, in the ladder 34, seven vertical pipes 34 a are arranged between the upper horizontal pipe 34 b and the lower horizontal pipe 34 c so as to be separated in the direction in which the leader 30 extends (the horizontal direction in FIG. 2). . When the leader 30 stands in the vertical direction, each vertical pipe 34a extends in the horizontal direction, and a worker's hand or foot is hung on each vertical pipe 34a. In the present embodiment, the pole mounting member 60 is mounted using the middle vertical pipe 34a and the lower horizontal pipe 34c among the seven vertical pipes 34a shown in FIG. Here, FIG. 4A is a cross-sectional view taken along line CC in FIG. 2, and FIG. 4B is a cross-sectional view taken along line DD in FIG.

  As shown in FIGS. 2 to 4, the pole mounting member 60 includes an upper plate 61 and a lower plate 62 that extend in the horizontal direction, two vertical plates 63 and 63 that extend in the vertical direction, and a ring pin 64. It is configured. As shown in FIG. 4A, the upper plate 61 is formed in a substantially U shape, has an insertion hole 61a through which the lower end portion 50a of the master rope 50 is inserted, and the ladder 34 has a vertical pipe 34a side. A concave portion 61b that is recessed in an arc shape is provided on the upper side of FIG. Thus, the upper plate 61 is assembled around the lower end portion 50a of the master rope 50 with the recess 61b engaged with the vertical pipe 34a. Further, parallel vertical plates 63 and 63 are attached to the lower surface of the upper plate 61.

  The lower plate 62 is parallel to the upper plate 61 and has a substantially dome-shaped dome portion 62a and a substantially rectangular-shaped rectangular portion 62b as shown in FIG. It has an insertion hole 62c through which the lower end 50a is inserted. The rectangular portion 62b is sandwiched between the vertical plates 63 and has a concave portion 62d that is recessed in an arc shape on the vertical pipe 34a side (the upper side in FIG. 4B) of the ladder 34. Thus, the lower plate 62 is assembled around the lower end portion 50a of the master rope 50 with the recess 62d engaged with the vertical pipe 34a. Here, FIG. 5 (A) is an enlarged view of the master rope 50 and the pole mounting member 60 shown in FIG. 1, and FIG. 5 (B) is a side view of FIG. 5 (A) viewed from the right side.

  Since the two vertical plates 63 have the same configuration, the configuration of one vertical plate 63 will be described. As shown in FIG. 5B, the vertical plate 63 is formed long in the vertical direction, has a concave portion 63a that is recessed in a circular arc shape on the lower side, and an insertion hole 63b through which the ring pin 64 is inserted on the upper side. have. Each vertical plate 63 is integrally fixed to the upper plate 61 and the lower plate 62, and the recess 63a engages with the lower horizontal pipe 34c of the ladder 34 so that it can rotate around the lower horizontal pipe 34c. Assembled to. The vertical plate 63 corresponds to the “lateral member engaging portion” of the present invention.

  As shown in FIG. 4A, the ring pin 64 is attached to each vertical plate 63, and has a pin portion 64a and a ring portion 64b. The pin portion 64a is inserted into the insertion hole 63b of each vertical plate 63, and the ring portion 64b prevents the pin portion 64a from coming out from the left vertical plate 63 in FIG. 4 (A) to the right side in FIG. 4 (A). Further, a retaining pin 65 is assembled on the tip end side of the pin portion 64a, and the pin portion 64a is moved from the right vertical plate 63 in FIG. 4A to the left side in FIG. 4A by the retaining pin 65. It is designed not to come out. The concave portion 61b of the upper plate 61 and the pin portion 64a of the ring pin 64 sandwich the vertical pipe 34a of the ladder 34, and each vertical plate 63 is restricted from rotating around the lower horizontal pipe 34c. . The ring pin 64, the upper plate 61, and the lower plate 62 correspond to the “vertical member engaging portion” of the present invention.

  As shown in FIGS. 5A and 5B, the master rope 50 is a pipe that extends in the vertical direction and has a circular cross section. Each member of the above-described pole attachment member 60 is attached to the lower end portion 50a of the master rope 50. Further, a ring-shaped master rope receiver 51 is attached to the upper end portion 50 b and the intermediate portion 50 c of the master rope 50. Thus, the master rope 50 is attached to the ladder 34 via the pole attachment member 60, and the master rope 100 (see FIG. 14) is passed through the master rope receiver 51 so as to be bridged between the parent ropes 50. It has become. The configuration of the pole mounting member 60 attached to the leader member 30C has been described above, but the configuration of the pole mounting member 60 (see FIG. 1) attached to the other leader members 30A and 30D is the same, and the description thereof is omitted. To do.

  Next, a method for attaching the master rope 50 to the ladder 34 will be described with reference to FIG. First, the pole attachment member 60 is attached to the lower end portion 50a of the master rope 50, and the master rope 50 and the pole attachment member 60 are configured integrally in advance (see FIG. 5). That is, the lower end 50 a of the master rope 50 is inserted through the insertion hole 61 a of the upper plate 61 and the insertion hole 62 c of the lower plate 62. Next, as shown in FIG. 6A, the recess 63a of each vertical plate 63 is engaged with the lower horizontal pipe 34c of the ladder 34.

  Subsequently, as shown in FIG. 6B, each vertical plate 63 is rotated around the lower horizontal pipe 34c, and the concave portion 61b of the upper plate 61 is engaged with the vertical pipe 34a of the ladder 34 (FIG. 4). (See (A)), the concave portion 62d of the lower plate 62 is engaged with the vertical pipe 34a of the ladder 34 (see FIG. 4B). Thereby, the horizontal movement of the parent rope 50 in FIGS. 4A and 4B is restricted. Finally, the pin portion 64a of the ring pin 64 is inserted into the insertion hole 63b of each vertical plate 63, and the retaining pin 65 is assembled to the distal end side of the pin portion 64a. Thereby, the rotation around the lower horizontal pipe 34c of the master rope 50 (each vertical plate 63) is restricted. Thus, the attachment of the master rope 50 to the ladder 34 is completed.

  When removing the master rope 50 from the ladder 34, the above-described procedure may be reversed. That is, the retaining pin 65 is removed from the pin portion 64 a of the ring pin 64, and the pin portion 64 a of the ring pin 64 is extracted from the insertion hole 63 b of each vertical plate 63. Then, when the engagement between the concave portion 63a of each vertical plate 63 and the lower lateral pipe 34c of the ladder 34 is released, the removal of the master rope 50 from the ladder 34 is completed. Thus, the attachment and detachment of the master rope 50 with respect to the ladder 34 can be performed very easily by the pole attachment member 60.

The effect of 1st Embodiment is demonstrated.
According to the pile driving machine 1 of the first embodiment, as described above, the pole attachment member 60 that holds the lower end portion 50a of the master rope 50 is detachably attached to the ladder 34. Therefore, only when the master rope 50 is attached to the leader 30, the pole attachment member 60 may be attached to the ladder 34, and the pole attachment member 60 is not fixed to the ladder 34. Therefore, the modification process (welding) for attaching the master rope 50 is unnecessary, and the master rope 50 can be attached to the leader 30 (ladder 34) without increasing the cost. Further, the pole mounting member 60 can be freely attached to and detached from the ladder 34 where the vertical pipe 34a and the lower horizontal pipe 34c are located. Therefore, when it is desired to change or increase the attachment position of the master rope 50, it is possible to respond flexibly.

  Further, according to the pole mounting member 60 of the first embodiment, the concave portion 63a of each vertical plate 63 is engaged with the lower horizontal pipe 34c of the ladder 34 so that it can be rotated around the lower horizontal pipe 34c. It is done. Then, the recess 61b of the upper plate 61 and the recess 62d of the lower plate 62 engage with the vertical pipe 34a of the ladder 34, and the ring pin 64 is inserted into the insertion hole 63b of each vertical plate 63, so that the pole mounting is performed. The movement and rotation in the left, right, up, down, front and rear directions around the lower horizontal pipe 34c by the member 60 are restricted. In this way, the pole mounting member 60 can be easily mounted in a stable state by utilizing the fact that the vertical pipe 34a and the lower horizontal pipe 34c of the ladder 34 have a T shape. Furthermore, since the pole mounting member 60 is mainly composed of the upper plate 61, the lower plate 62, the two vertical plates 63, and the ring pin 64, the number of constituent members is small and simple. Therefore, the pole attaching member 60 is very easy to implement as a member for attaching the master rope 50.

  Next, a second embodiment will be described. In the second embodiment, the description will focus on the parts that are different from the first embodiment, and the same parts as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted. In the pile driving machine 1A of the second embodiment and the pile driving machine 1 of the first embodiment, the configuration of the pole mounting members is different. As shown in FIG. 7, the pole attachment member 70 of the second embodiment is attached to a guide pipe 32 fixed to the leader 30. Here, FIG. 8 is a cross-sectional view taken along line EE of FIG. 9 is a side view of FIG. 8 viewed from the right side, and FIG. 10 is a cross-sectional view taken along line FF of FIG.

  As shown in FIGS. 8 to 10, the pole mounting member 70 includes a cylindrical pipe 71, a support plate 72 extending in the horizontal direction, an L-shaped plate 73 and an L-shaped mounting piece 74 having an L-shaped cross section, and a bolt 75. And a nut 76, a fixed plate 77 fixed to the cylindrical pipe 71, and a rotating plate 78 rotatably attached to the fixed plate 77. Here, FIG. 11A is an enlarged view of the cylindrical pipe 71, the support plate 72, the L-shaped plate 73, the L-shaped mounting piece 74, and the fixed plate 77 shown in FIG. FIG. 11B is a side view of FIG. 11A viewed from the right side, and FIG. 11C is a plan view of FIG. 11B.

  As shown in FIGS. 11A, 11B, and 11C, the cylindrical pipe 71 has an insertion hole 71a through which the lower end 50a of the parent rope 50 is inserted, and an attachment hole 71b that penetrates in the radial direction. ing. The attachment hole 71b is for assembling the retaining pin 80. Here, FIG. 12A is an enlarged view of the master rope 50A shown in FIG. 7, and FIG. 12B is a side view of FIG. 12A viewed from the right side. The master rope 50A has a mounting hole 50a1 penetrating in the radial direction at the lower end 50a and a flange 52 on the upper side of the mounting hole 50a1. 8 and 9, the lower end 50a of the master rope 50A is inserted into the insertion hole 71a of the cylindrical pipe 71, and the flange 52 of the master rope 50A is locked to the upper end of the cylindrical pipe 71. ing. The retaining pin 80 is assembled to the mounting hole 71b of the cylindrical pipe 71 and the mounting hole 50a1 of the master rope 50A, and the lower end portion 50a of the master rope 50A is held by the cylindrical pipe 71.

  As shown in FIG. 11C, the support plate 72 has a rectangular shape. The cylindrical pipe 71 is fixed on the upper side, and the L-shaped plate 73 and the L-shaped mounting piece 74 are fixed on the lower side. A mounting hole 72a is formed in the upper corner portion of FIG. 11C in the support plate 72, and nuts 76 are fixed vertically as shown in FIG. And the attachment hole 72a of a support plate and the screw hole of each nut 76 are connecting. As a result, the bolt 75 is attached to the attachment hole 72a of the support plate and the screw hole of each nut 76 so that the vertical position can be adjusted.

  The L-shaped plate 73 has a vertical portion 73a that extends downward from the lower surface of the support plate 72, and a bent portion 73b that bends in the horizontal direction from the lower end of the vertical portion 73a. Two L-shaped mounting pieces 74 are mounted in parallel along the L-shaped plate 73. Here, as shown in FIG. 8, the guide pipes 32 are respectively fixed to the upper ends of the side surface 30a and the side surface 30b of the leader member 30C. The guide pipe 32 is a pipe having a rectangular cross section, and has an upper surface 32a, a lower surface 32b, a left side surface 32c, and a right side surface 32d.

  In the L-shaped plate 73, the vertical portion 73 a is engaged (surface contact) with the right side surface 32 d of the guide pipe 32, and the bent portion 73 b is engaged with the lower surface 32 b of the guide pipe 32. Then, the vertical position of the bolt 75 is adjusted, and the head portion 75 a of the bolt 75 is engaged with the upper surface 32 a of the guide pipe 32. As a result, the guide pipe 32 is sandwiched between the bent portion 73b of the L-shaped plate 73 and the head portion 75a of the bolt 75 in the vertical direction. The L-shaped plate 73 and the bolt 75 correspond to the “longitudinal engagement portion” of the present invention.

  As shown in FIG. 10, the fixed plates 77 extend from the cylindrical pipe 71 in the radially outward direction (the upper side in FIG. 10), and are provided in pairs in parallel. As shown in FIG. 11 (A), each fixed plate 77 has a first insertion hole 77a for rotatably mounting the rotation plate 78, and at a position away from the first insertion hole 77a in the horizontal direction. It has the 2nd penetration hole 77b, and has the 3rd penetration hole 77c in the position away from the 1st penetration hole 77a to the upper part. As shown in FIG. 10, the rotating plate 78 is sandwiched between the fixed plates 77. Here, FIG. 13 is an enlarged view of the rotating plate 78 shown in FIG. As shown in FIG. 13, the rotating plate 78 is formed in a substantially L shape, and has a short side portion 78a and a long side portion 78b. A support hole 78c is formed at the end of the short side portion 78a, and a fixing hole 78d is formed inside (on the left side in FIG. 14) the support hole 78c.

  As shown in FIG. 8, the rotation plate 78 is rotatably attached to each fixed plate 77 by inserting a support pin 81 through the support hole 78 c and the first insertion hole 77 a of each fixed plate 77. . Note that a retaining pin (not shown) is assembled to the distal end side of the support pin 81. The ring pin 82 is inserted into the fixing hole 78d of the rotating plate 78 and the second insertion hole 77b of each fixing plate 77, so that the rotation of the rotating plate 78 is restricted, and the position of the rotating plate 78 is fixed. Yes. Thereby, the long side part 78b of the rotating plate 78 is engaged with the side surface 30a of the leader member 30C. As a result, the guide pipe 32 is sandwiched in the left-right direction by the long side portion 78 b of the rotating plate 78 and the vertical portion 73 a of the L-shaped plate 73. The rotating plate 78 and the L-shaped plate 73 correspond to the “lateral engagement portion” of the present invention.

  As shown in FIG. 10, the ring pin 82 is attached to each fixed plate 77 and rotating plate 78, and has a pin portion 82a and a ring portion 82b. A retaining pin 83 is assembled to the distal end side of the pin portion 82a. Thus, the ring pin 82 is prevented from falling off from the second insertion hole 77b of each fixing plate 77 by the retaining pin 83 and the ring portion 82b. Here, when the rotating plate 78 is fixed at the position indicated by the two-dot chain line in FIG. 8, the ring pin 82 is first extracted from the second insertion hole 77 b of each fixing plate 77 and the fixing hole 78 d of the rotating plate 78. Then, the rotating plate 78 is rotated 90 degrees clockwise around the support pin 81, and the ring pin 82 is inserted into the third insertion hole 77 c of each fixing plate 77 and the fixing hole 78 d of the rotating plate 78. Thus, the position of the rotating plate 78 can be fixed at the position indicated by the two-dot chain line in FIG. 8, and the pole mounting member 70 can be easily detached from the guide pipe 32.

  Next, a method for attaching the master rope 50A to the guide pipe 32 will be described. First, the pole attachment member 70 is attached to the lower end portion 50a of the master rope 50A, and the master rope 50A and the pole attachment member 70 are integrally configured in advance. That is, the lower end portion 50a of the master rope 50A is inserted into the insertion hole 71a of the cylindrical pipe 71, and the retaining pin 80 is assembled to the attachment hole 71b of the cylindrical pipe 71 and the attachment hole 50a1 of the master rope 50A. At this time, the ring pin 82 is inserted into the third insertion hole 77c of each fixing plate 77 and the fixing hole 78d of the rotating plate 78, and the rotating plate 78 is fixed at a position indicated by a two-dot chain line in FIG. .

  Subsequently, the vertical portion 73 a of the L-shaped plate 73 is engaged with the right side surface 32 d of the guide pipe 32, and the bent portion 73 b of the L-shaped plate 73 is engaged with the lower surface 32 b of the guide pipe 32. Next, the bolt 75 is moved downward to press the head 75 a of the bolt 75 against the upper surface 32 a of the guide pipe 32. Thus, the upper surface 32 a and the lower surface 32 b of the guide pipe 32 are sandwiched between the head portion 75 a of the bolt 75 and the bent portion 73 b of the L-shaped plate 73.

  Further, the ring pin 82 is removed from the third insertion hole 77c of each fixing plate 77 and the fixing hole 78d of the rotating plate 78, and the rotating plate 78 is rotated to the position indicated by the solid line in FIG. Then, the ring pin 82 is reinserted into the second insertion hole 77 b of each fixing plate 77 and the fixing hole 78 d of the rotating plate 78, and the retaining pin 83 is assembled to the pin portion 82 a of the ring pin 82. Accordingly, the long side portion 78b of the rotating plate 78 is fixed and engaged with the side surface 30a of the leader member 30C. Thus, the left side surface 32 c and the right side surface 32 d of the guide pipe 32 are sandwiched between the long side portion 78 b of the rotating plate 78 and the vertical portion 73 a of the L-shaped plate 73. In this manner, the attachment of the master rope 50A to the guide pipe 32 is completed.

  When removing the master rope 50A from the guide pipe 32, the above procedure may be reversed. That is, the retaining pin 83 is removed from the pin portion 82 a of the ring pin 82, and the ring pin 82 is removed from the fixing hole 78 d of the rotating plate 78 and the second insertion hole 77 b of each fixing plate 77. As a result, the engagement between the long side portion 78b of the rotating plate 78 and the side surface 30a of the leader member 30C is released. Further, the bolt 75 is moved upward to release the engagement between the head 75 a of the bolt 75 and the upper surface 32 a of the guide pipe 32. Then, the engagement between the vertical portion 73a of the L-shaped plate 73 and the right side surface 32d of the guide pipe 32 is released, and the engagement between the bent portion 73b of the L-shaped plate 73 and the lower surface 32b of the guide pipe 32 is released. The removal of the parent rope 50A from the guide pipe 32 is completed.

The effect of 2nd Embodiment is demonstrated.
According to the pile driving machine 1A of the second embodiment, as described above, the pole attachment member 70 that holds the lower end portion 50a of the master rope 50A is detachably attached to the guide pipe 32. For this reason, the pole attachment member 70 may be attached to the guide pipe 32 only when the parent rope 50A is attached to the leader 30. Therefore, the modification process (welding) for attaching the master rope 50A is unnecessary, and the master rope 50A can be attached to the leader 30 (guide pipe 32) without increasing the cost. Further, the pole mounting member 70 can be attached and detached at an arbitrary position in the longitudinal direction of the guide pipe 32. Therefore, when it is desired to change or increase the attachment position of the master rope 50A, it is possible to respond flexibly.

  Further, according to the pole mounting member 70 of the second embodiment, the upper surface 32a and the lower surface 32b of the guide pipe 32 are sandwiched in the vertical direction as described above by utilizing the fact that the cross section of the guide pipe 32 is rectangular. At the same time, the left side surface 32c and the right side surface 32d of the guide pipe 32 are sandwiched in the left-right direction. Thereby, the pole attachment member 70 can be attached in a stable state.

As mentioned above, although each embodiment of the pile driver concerning this invention was described, this invention is not limited to these embodiment, A various change is possible in the range which does not deviate from the meaning.
The pole mounting member 60 of the first embodiment is mounted on the vertical pipe 34a and the lower horizontal pipe 34c of the ladder 34, but the configuration of the pole mounting member can be changed as appropriate. For example, the pole attaching member may be attached to the vertical pipe 34a and the upper horizontal pipe 34a of the ladder 34.
The reader 30 is formed by connecting the five reader members 30A to 30E, but the number of reader members forming the reader 30 can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1,1A Pile driver 10 Upper turning body 20 Lower traveling body 30 Leader 30A-30E Leader member 34 Ladder 34a Vertical pipe 34b Upper side pipe 34c Lower side pipe 40 Auger 50, 50A Parent rope poles 60, 70 Pole attachment member 61 Upper plate 62 Lower plate 63 Vertical plate 64 Ring pin 71 Cylindrical pipe 72 Support plate 73 L-shaped plate 74 L-shaped mounting piece 75 Bolt 76 Nut 77 Fixed plate 78 Rotating plate 80 Retaining pin 100 Master rope

Claims (2)

A leader formed by connecting a plurality of leader members is attached to the upper swing body so as to be raised and lowered,
A guide pipe that extends in the same direction as the leader and moves the working device up and down is fixed to the leader,
A ladder having a vertical member extending in the vertical direction and a horizontal member extending in the horizontal direction is fixed to the reader and the master rope pole extending in the vertical direction can be attached to the reader in a state where the reader is tilted. In the pile driver,
A pole mounting member that holds the lower end of the master rope is provided,
The pole mounting member is detachably mounted on the ladder ;
The pole mounting member has a vertical member engaging portion that engages with a vertical member of the ladder, and a horizontal member engaging portion that engages with a horizontal member of the ladder,
The transverse member engaging portion is rotatably assembled around the transverse member;
The vertical member engaging portion regulates movement in the left-right direction and the front-rear direction with respect to the horizontal member by sandwiching the vertical member,
The lateral member engaging portion is pinned in a state of being engaged with the lateral member, thereby restricting movement in the vertical direction and the rotational direction with respect to the lateral member,
Pile driver characterized by. A leader formed by connecting a plurality of leader members is attached to the upper swing body so as to be raised and lowered,
A guide pipe that extends in the same direction as the leader and moves the working device up and down is fixed to the leader,
A ladder having a vertical member extending in the vertical direction and a horizontal member extending in the horizontal direction is fixed to the reader and the master rope pole extending in the vertical direction can be attached to the reader in a state where the reader is tilted. In the pile driver,
A pole mounting member that holds the lower end of the master rope is provided,
The pole mounting member is detachably mounted on the guide pipe ;
The guide pipe has a rectangular cross section and has an upper surface, a lower surface, a left side surface, and a right side surface,
The pole mounting member has a vertical engagement portion sandwiched vertically between the upper and lower surfaces of the guide pipe;
The pole mounting member includes a rotating plate, and has a lateral engagement portion that sandwiches the guide pipe by pinning the rotated rotating plate.
Pile driver characterized by.

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