JP2018040144A - Pile driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile driver capable of achieving lubrication between a guide pipe and a guide gib while alleviating a burden on a worker.SOLUTION: In one aspect of the present invention, a pile driver 1 includes a leader 21 to which a cylindrical guide pipe 24 is fixed, and an auger 31 that comprises a guide gib 32 sliding on an outer peripheral surface 27 of the guide pipe 24. The pile driver has a grease storage part 61 that is formed within the guide pipe 24 to store grease, an attachment 72 that is provided within the grease storage part 61, and a spring 73 that pushes the attachment 72 so that a tip 72a of the attachment 72 can protrude from an outer peripheral surface 27 of the guide pipe 24.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pile driving machine, and more particularly to a pile driving machine in which an auger moves up and down when a guide gib provided in an auger slides on a guide pipe fixed to a leader.

  As for a pile driver, in Patent Document 1, a guide pipe is provided on both left and right sides of a leader so as to extend vertically, and a pile driver in which an auger guide gib slides up and down along the guide pipe. It is disclosed.

JP 2014-133985 A

  In the pile driving machine as disclosed in Patent Document 1, in order to lubricate between the guide pipe and the guide gib so that the guide gib can slide on the guide pipe smoothly, applying grease to the guide pipe is performed. . At this time, for example, there is a guide give with a greasing port that accumulates grease in a recess inside the guide give and applies the grease to the guide pipe when the auger is raised and lowered. However, since the amount of grease that can be stored in the recess inside the guide gib is limited, there is a possibility that the grease cannot be reliably applied to the guide pipe over the entire leader. Therefore, an operator manually applies grease to the guide pipe before standing the leader. However, since such manual work must be performed for each construction site, the work becomes complicated and the burden on the operator increases.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a pile driving machine capable of achieving lubrication between the guide pipe and the guide gib while reducing the burden on the operator. And

  One aspect of the present invention made to solve the above problems is a pile driver having a leader to which a cylindrical guide pipe is fixed, and a working device having a guide gib that slides on the outer peripheral surface of the guide pipe. The lubricant storage part formed in the guide pipe for storing the lubricant, the attachment provided in the lubricant storage part, and the attachment so that the tip of the attachment protrudes from the outer peripheral surface of the guide pipe. And an attachment pressing member to be pressed.

  According to this aspect, when the guide gib that slides on the outer peripheral surface of the guide pipe passes through the position where the tip of the attachment protrudes, the attachment opposes the pressing force of the attachment pressing member by the guide gib and moves into the lubricant reservoir. And pushed. As a result, the lubricant stored in the lubricant storage part oozes out of the guide pipe from the gap between the tip of the attachment and the guide pipe. In this way, the lubricant is supplied to the outer peripheral surface of the guide pipe, and the guide gib slides on the outer peripheral surface of the guide pipe to which the lubricant has been supplied in this way, so that the lubricant is spread over the entire guide pipe. Can be supplied. Then, the supply of the lubricant between the guide pipe and the guide give is automated. Therefore, lubrication between the guide pipe and the guide gib can be achieved while reducing the burden on the operator.

  In the above aspect, the leader is formed by connecting a plurality of leader members, and the guide pipe is formed by connecting a guide pipe member fixed to each of the leader members, and the adjacent guide pipes The members are connected via a connecting member that fits into the guide pipe member, and the connecting member includes a lubricant supply hole for supplying the lubricant into the lubricant reservoir. It is preferable.

  According to this aspect, the lubricant can be easily supplied into the lubricant reservoir through the lubricant supply hole. Therefore, a sufficient amount of lubricant to be supplied to the outer peripheral surface of the guide pipe can be stably filled in the lubricant reservoir.

  In said aspect, it is preferable to have the piston which faces the said lubricant storage part, and the piston pressing member which presses the said piston toward the said lubricant storage part.

  According to this aspect, the pressure of the lubricant reservoir can be adjusted by applying the pressing force of the piston pressing member to the lubricant reservoir via the piston. Therefore, by adjusting the pressure of the lubricant reservoir to a predetermined pressure, the lubricant that is more reliably stored in the lubricant reservoir when the attachment is pushed into the lubricant reservoir by the guide give. Can ooze out of the guide pipe. Therefore, it is possible to achieve more stable lubrication between the guide pipe and the guide give.

  According to the pile driver according to the present invention, lubrication between the guide pipe and the guide gib can be achieved while reducing the burden on the operator.

It is a general view of a pile driver of this embodiment. FIG. 2 is a detailed view of part A in FIG. 1. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a figure which shows a mode that two guide pipe members are connected. It is sectional drawing of the leader and guide pipe in a modification.

  An embodiment of a pile driver according to the present invention will be described with reference to the drawings. As shown in FIG. 1, in the pile driving machine 1 of the present embodiment, an upper swing body 11 is mounted so as to be able to swing with respect to the lower traveling body 12. The leader 21 is attached to the front side (left side in FIG. 1) of the upper swing body 11. FIG. 1 shows a state in which the reader 21 stands up in the vertical direction.

  The upper swing body 11 has a cab 13 for performing a driving operation. The upper swing body 11 is provided with a backstay 14 that supports the leader 21 from the rear side (right side in FIG. 1) in a state where the leader 21 stands. The lower traveling body 12 can travel by a crawler 15 and supports the upper revolving body 11 through a bearing 16 so as to be rotatable.

  The reader 21 extends in a straight line and is formed by connecting a plurality of reader members 22 (22A, 22B, 22C, 22D, 22E, 22F). A flange 23 is formed at the end of each leader member 22, and the flanges 23 of adjacent leader members 22 are connected to each other using bolts and nuts.

  An iron tubular guide pipe 24 extending in the same direction as the leader 21 is fixed to the leader 21. An iron guide give 32 of the auger 31 is assembled to the guide pipe 24 so as to be slidable along the leader 21. The guide pipe 24 extends linearly and is formed by connecting a plurality of guide pipe members 25 (25A, 25B, 25C, 25D, 25E, 25F). As shown in FIG. 3, a pair of guide pipe members 25 are fixed to each leader member 22. In this way, the pair of guide pipes 24 are fixed to the reader 21. In this embodiment, as shown in FIGS. 2 to 5, the guide pipe member 25 (guide pipe 24) is formed in a cylindrical shape.

  The auger 31 has a guide give 32 assembled to the guide pipe 24 and a rotation drive device 33 that rotationally drives the rod 41 (or steel pipe pile). In the example shown in FIGS. 1 and 3, a total of two pairs of guide gibs 32 corresponding to the pair of guide pipes 24 are provided in the upper and lower portions of the auger 31. A wire rope 52 spanned from a winch (not shown) provided on the upper swing body 11 is connected to the auger 31 via a top sheave block 51 provided on the top of the reader 21. The auger 31 can be moved up and down along the reader 21 by operating the winch. At this time, the guide give 32 provided in the auger 31 slides on the outer peripheral surface 27 of the guide pipe 24 fixed to the leader 21.

  The rod 41 has a screw on the outer periphery, and has an upper end connected to the auger 31 and a drilling head detachably connected to the lower end.

  This pile driver 1 pushes the rod 41 into the ground while rotating the rod 41 by lowering the auger 31 suspended by the wire rope 52 along the leader 21 with the leader 21 standing in the vertical direction. Can do. On the other hand, the pile driving machine 1 is pulled out from the ground while rotating the rod 41 by raising the auger 31 suspended by the wire rope 52 along the leader 21 with the leader 21 standing in the vertical direction. be able to.

  Next, the guide pipe member 25 of this embodiment will be described. Note that the guide pipe members 25A, 25B, 25C, 25D, and 25E are different in length, but have the same structure. Therefore, in the following description, the guide pipe member 25A will be described as a representative. The structure of the guide pipe member 25F may be the same as or different from the structure of the guide pipe members 25A, 25B, 25C, 25D, and 25E.

  As shown in FIG. 2, a grease storage portion 61 (lubricant storage portion) that stores grease is formed in the guide pipe member 25A. An attachment unit 71 is provided in the grease storage unit 61. Specifically, a cylindrical cylinder 28 is disposed in the guide pipe member 25A, a grease storage portion 61 is formed in the cylinder 28, and an attachment portion 71 and a pressing mechanism 91 to be described later are provided. It has been. The cylinder 28 includes an upper surface 28a and a lower surface 28b formed on both sides of the cylindrical axial direction. The grease is, for example, a mixture of molybdenum disulfide and oil.

  The attachment part 71 includes an attachment 72, a spring 73 (attachment pressing member), and the like. The attachment 72 is pressed by the spring 73 toward the outer side in the radial direction of the guide pipe member 25A (left side in FIG. 2). And thereby, the front-end | tip 72a of the attachment 72 protrudes toward the exterior of the guide pipe member 25A from the outer peripheral surface 27 of the guide pipe member 25A through the through-hole 26 provided in the guide pipe member 25A. In FIG. 3, the distal ends 72a of the attachments 72 provided on the pair of guide pipe members 25A protrude from the outer peripheral surface 27 of the guide pipe member 25A toward the upper side and the lower side of the drawing, respectively.

  In this embodiment, when the guide gib 32 that slides on the outer peripheral surface 27 of the guide pipe member 25A (guide pipe 24) passes through the position where the tip 72a of the attachment 72 protrudes (see FIG. 4), the tip of the attachment 72 72 a is pushed by the guide give 32. In this way, the attachment 72 is pushed into the grease storage portion 61 by the guide give 32 against the pressing force of the spring 73. Thereby, the grease stored in the grease storage part 61 oozes out of the guide pipe member 25A from the gap between the tip 72a of the attachment 72 and the through hole 26 of the guide pipe member 25A.

  As a result, grease is supplied to the outer peripheral surface 27 of the guide pipe member 25A, and the guide gib 32 slides on the outer peripheral surface 27 supplied with the grease in this way toward the vertical direction (axial direction) of the guide pipe 24. Since it moves, grease can be supplied over the entire guide pipe 24. In this way, the supply of grease between the guide pipe 24 and the guide give 32 is automated. Therefore, lubrication between the guide pipe 24 and the guide give 32 can be achieved while reducing the burden on the operator.

  In the present embodiment, adjacent guide pipe members 25 are connected to each other via a joint pin 81 (a connecting member) that fits in the guide pipe member 25. For example, as shown in FIGS. 2 and 5, the guide pipe member 25A and the guide pipe member 25B are connected via a joint pin 81 that is fitted to the guide pipe member 25A and the guide pipe member 25B. And the joint pin 81 is provided with the grease supply hole 82 and the grease nipple 83 for pouring grease when supplying grease in the grease storage part 61 formed in the guide pipe member 25A. The grease supply hole 82 communicates with the grease storage portion 61 via a through hole 28c (see FIG. 2) formed in the lower surface 28b of the cylinder 28.

  Thereby, the grease can be easily supplied from the grease nipple 83 into the grease storage portion 61 through the grease supply hole 82. The grease nipple 83 includes a check valve, and the grease is injected into the grease supply hole 82 by applying pressure.

  In the present embodiment, a pressing mechanism 91 is provided in the cylinder 28 provided in the guide pipe member 25 so as to be adjacent to the grease storage portion 61. For example, as shown in FIG. 2, the pressing mechanism 91 includes a piston 92 that faces the grease storage portion 61 and a spring 93 (a piston pressing member) that presses the piston 92 toward the grease storage portion 61. It has. The pressing mechanism 91 can adjust the pressure in the grease storage unit 61 using the pressing force of the spring 93. Then, by adjusting the pressure of the grease reservoir 61 to a predetermined pressure, when the attachment 72 is pushed into the grease reservoir 61 by the guide gib 32, the grease is transferred from the grease reservoir 61 to the guide pipe member 25A. And the guide pipe member 25A ooze out from the gap between the distal end 72a of the attachment 72 and the through hole 26 of the guide pipe member 25A. Thus, since grease is more reliably supplied to the outer peripheral surface 27 of the guide pipe member 25A, the lubrication between the guide pipe 24 and the guide gib 32 can be achieved stably.

  By adjusting the pressing force of the spring 93, the amount of grease discharged from the through hole 26 of the guide pipe member 25A can be adjusted. Further, by adjusting the pressing force of the spring 93, for example, when the guide give 32 stops at a position where the tip 72a of the attachment 72 protrudes, more than a necessary amount of grease is added to the tip 72a of the attachment 72 and the guide pipe member. It is also possible not to exude from the gap with the 25A through hole 26.

  As a modification, the leader member 22 (leader 21) and the guide pipe member 25 (guide pipe 24) may be formed in a cylindrical shape having a square cross section as shown in FIG. In detail, in the example shown in FIG. 6, the leader member 22 is formed in a cylindrical shape having a rectangular cross section, and the guide pipe member 25 is formed in a cylindrical shape having a square cross section.

  As described above, according to the present embodiment, the pile driving machine 1 having the leader 21 to which the cylindrical guide pipe 24 is fixed and the auger 31 including the guide gibs 32 that slide on the outer peripheral surface 27 of the guide pipe 24. The grease storage part 61 that is formed in the guide pipe 24 and stores the grease, the attachment 72 provided in the grease storage part 61, and the attachment 72 so that the tip 72a of the attachment 72 protrudes from the outer peripheral surface 27 of the guide pipe 24. And a spring 73 for pressing 72.

  Thereby, when the guide give 32 that slides on the outer peripheral surface 27 of the guide pipe 24 passes through the position where the tip 72 a of the attachment 72 protrudes, the attachment 72 is opposed to the pressing force of the spring 73 by the guide give 32, and the grease storage portion 61. It is pushed inward. Therefore, the grease stored in the grease storage part 61 oozes out of the guide pipe 24 from the gap between the tip 72a of the attachment 72 and the through hole 26 of the guide pipe member 25. As a result, grease is supplied to the outer peripheral surface 27 of the guide pipe 24, and the guide gib 32 slides on the outer peripheral surface 27 supplied with the grease in this way, so that the grease is supplied over the entire guide pipe 24. be able to. Then, the supply of grease between the guide pipe 24 and the guide give 32 is automated. Therefore, lubrication between the guide pipe 24 and the guide give 32 can be achieved while reducing the burden on the operator.

  Conventionally, there has been a possibility that grease may flow when it rains, but according to the present embodiment, it is possible to reapply grease even if the grease flows when it rains. Further, according to the present embodiment, the grease is newly applied to the outer peripheral surface 27 of the guide pipe 24 every time the guide give 32 passes through the position where the tip 72a of the attachment 72 protrudes, so that the old grease can be removed. .

  Further, according to the present embodiment, the leader 21 is formed by connecting a plurality of leader members 22, and the guide pipe 24 is formed by connecting guide pipe members 25 fixed to the respective leader members 22. Yes. The adjacent guide pipe members 25 are connected to each other via a joint pin 81 that fits in the guide pipe member 25, and the joint pin 81 supplies grease to supply grease into the grease storage portion 61. A hole 82 is provided. Thereby, when it is desired to supply the grease into the grease storage unit 61, the grease can be easily supplied into the grease storage unit 61 via the grease supply hole 82. Therefore, a sufficient amount of grease to be supplied to the outer peripheral surface 27 of the guide pipe 24 over the entire leader 21 can be stably filled in the grease storage portion 61.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Pile driver 21 Leader 22 (22A-22F) Leader member 24 Guide pipe 25 (25A-25F) Guide pipe member 31 Auger 32 Guide give 52 Wire rope 61 Grease storage part 71 Attachment part 72 Attachment 72a Tip 73 Spring 81 Joint pin 82 Grease supply hole 91 Press mechanism 92 Piston 93 Spring

Claims (3)

A reader to which a cylindrical guide pipe is fixed;
In a pile driving machine having a working device comprising a guide gib that slides on the outer peripheral surface of the guide pipe,
A lubricant reservoir formed in the guide pipe and storing the lubricant;
An attachment provided in the lubricant reservoir;
An attachment pressing member that presses the attachment so that a tip of the attachment protrudes from an outer peripheral surface of the guide pipe;
Pile driver characterized by. The pile driver of claim 1,
The reader is formed by connecting a plurality of reader members,
The guide pipe is formed by connecting guide pipe members fixed to each of the leader members,
The adjacent guide pipe members are connected via a connecting member that fits into the guide pipe member,
The connecting member includes a lubricant supply hole for supplying the lubricant into the lubricant reservoir;
Pile driver characterized by. In the pile driver according to claim 1 or 2,
A piston facing the lubricant reservoir;
A piston pressing member that presses the piston into the lubricant reservoir,
Pile driver characterized by.

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