JP6651253B2 - Auger mounting method for pile driver and support jig for mounting and removing auger - Google Patents

Description

  The present invention relates to an auger attaching / detaching method for a pile driver and a support jig for attaching / detaching an auger.

  2. Description of the Related Art In recent years, a small pile driver that can be set in a transport posture without removing a working device such as an auger has been developed (for example, see Patent Document 1). In addition, a method of disassembling or reassembling a leader including a plurality of leader members according to a transportation state and a working state has been developed (for example, see Patent Document 2).

JP 2015-178733 A JP 2010-47995 A

  However, even in the case of the small pile driver described in Patent Literature 1, it is necessary to remove the auger and transport it when there is a limit on the loading mass of the transport truck. However, although there is a method of disassembling and reassembling the leader as described in Patent Document 2, there is no method for attaching and detaching an auger safely and efficiently and no jig to support them.

  In particular, a newly designed pile driver can be designed in consideration of the transportation conditions in advance, but none was applicable to existing pile drivers.

  Therefore, an object of the present invention is to provide an auger attaching / detaching method that can be applied to an existing pile driver and a jig that supports them.

  In order to achieve the above object, an auger attaching / detaching method for a pile driver according to the present invention is configured such that a leader provided at a front portion of a base machine is supported by an up / down cylinder so as to be able to undulate, and an auger is attached to the leader so as to be able to move up and down. The auger is mounted so as to be able to move up and down while holding a pair of guide pipes provided on both sides of the leader with a guide gib, and above and below the auger, an upper sprocket attached to an upper end of the leader and a lower end of the leader. In the method of attaching and detaching the auger of the pile driver in which both ends of the elevating chain extended over the lower sprocket provided in the section are attached, when attaching and detaching the auger, a guide for attaching a guide give hook to the guide give of the auger A gib hook attaching step, and a hook for fixing the elevating chain attached above and below the auger to a reader. A chain stopper mounting step of mounting a lift stopper, a lifting chain separating step of separating the lifting chain from the auger, a guide gib removing step of removing the guide gib from the auger, and an auger lifting step of lifting the auger from the reader. It is characterized by:

  Also, when mounting the auger, an auger suspending step of hanging the auger on the reader, an auger guide attaching step of attaching an auger guide to the auger, and an elevating chain connecting step of connecting the elevating chain above and below the auger. Preferably, the method further includes a step of removing the chain stopper, a step of removing the chain stopper, and a step of attaching a guide gib for replacing the auger guide with the guide gib.

  Further, the support jig for attaching and detaching the auger of the present invention supports the leader provided at the front part of the base machine in an up-and-down manner by an up-and-down cylinder, and mounts the auger on the reader so as to be able to move up and down. A pair of guide pipes provided on both sides of the auger are mounted so as to be able to ascend and descend while holding the pair of guide pipes with a guide gib. A jig for supporting the mounting and dismounting of the auger of a pile driver in which both ends of an elevating chain suspended over a lower sprocket are attached, wherein the jig functions as a handle when removing the guide gib. It has a gib hook and a chain stopper for fixing the elevating chain to the leader, and the guide gib hook is used when working. A hook portion that functions as a hand, and an insertion pin that is inserted into an insertion hole for a guide-giving fastening bolt; A lower side chain stopper for fixing a lower side elevating chain, wherein the upper side chain stopper is provided on both sides of the fixing part for nipping the rollers of the elevating chain, and a grip for gripping the guide pipe. And the lower chain stopper has a fixing portion for holding the roller of the elevating chain and a mounting portion attached to a lower end portion of the reader.

  Further, it is preferable to use the above-mentioned support jig in the above-mentioned auger attaching / detaching method.

  According to the method of attaching and detaching the auger of the pile driver according to the present invention, the attaching and detaching of the auger can be performed safely. In addition, there is no need to remodel existing pile driving machines as long as a support jig for attachment and detachment is prepared.

It is a side view of the pile driver in the state which made the leader stand. FIG. FIG. It is a side view of the pile driver in the state where the leader was laid down. It is explanatory drawing which shows attachment of a guide give hook. It is a detailed explanatory view showing attachment of a guide give hook. It is explanatory drawing which shows the attached state of a guide give hook from the back side. FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7. It is explanatory drawing which shows attachment of a chain stopper. It is a side view which shows the attachment state of an upper chain stopper and a lower chain stopper. It is a top view which shows the attachment state of an upper chain stopper and a lower chain stopper. It is XII-XII sectional drawing of FIG. It is XIII-XIII sectional drawing of FIG. FIG. 4 is an exploded perspective view showing an attached state of an upper chain stopper. It is sectional side view which shows the attachment state of a lower chain stopper. FIG. It is explanatory drawing which shows separation of a raising / lowering chain, and lifting of an auger. FIG. 4 is an explanatory diagram showing a state where the removal of the auger 26 is completed. It is explanatory drawing which shows the suspended state of the auger 26. FIG. 4 is a side view showing an attached state of the auger guide 70. FIG. 21 is a sectional view taken along the line XXI-XXI in FIG. 20. It is explanatory drawing which shows connection of a raising / lowering chain, and removal of a chain stopper. FIG. 3 is an explanatory diagram illustrating the standing of a reader 14. It is an explanatory view showing attachment of a guide give. FIG. 5 is an explanatory diagram showing a state where the mounting of the auger 26 is completed.

  FIGS. 1 to 25 show an embodiment of an auger attaching / detaching method of a pile driver according to the present invention, and are explanatory views showing respective stages of attaching and detaching an auger mounted on a leader of the pile driver.

  First, FIG. 1 to FIG. 3 show a state at the time of operation of the pile driver. The pile driving machine 11 has a base machine 13 composed of a traveling section 12a provided with a crawler, an upper revolving unit 12b rotatably provided on the traveling section 12a, and a front part of the base machine 13. A leader 14 is provided so as to be able to undulate, and an undulating cylinder 15 for the leader that supports the leader 14 from behind. At the front of the base machine 13, a front bracket 16 that supports the reader 14 so as to be able to undulate is provided. The front bracket 16 is provided with a cylinder mounting part 17 to which the base of the undulating cylinder 15 is rotatably mounted. I have. Further, a pipe support member 18 that supports the hydraulic pipe is provided above the front part of the base machine 13.

  The reader 14 includes a lower reader 21 rotatably mounted on a support shaft 19 in the width direction of the base machine provided on the front bracket 16, an intermediate reader 22 connected to an upper portion of the lower reader 21, The intermediate leader 22 is divided into an intermediate first member 22a and an intermediate second member 22b, and the upper leader 23 is divided into an upper first member 22b. 23a and an upper second member 23b. These leader members are detachably connected by flange members using bolts and nuts.

  The tip of the cylinder rod 15a of the undulating cylinder 15 and the intermediate leader 22 are rotatably connected to a cylinder bracket 22c provided on the rear surface of the intermediate second member 22b via a connection pin. A top sheave 24 is mounted on the upper end of the upper leader 23, a lower guide 25 is mounted on a drive sprocket cover 37 provided on a lower end of the lower leader 21, and an auger 26 is mounted on the front of the reader 14. Is mounted so as to be able to ascend and descend, and a chain type elevating device 27 for elevating and lowering the auger 26 is provided.

  The auger 26 moves up and down along the reader 14 in a state where a pair of guide pipes 28 provided on both sides of the leader 14 are gripped by a pair of left and right upper guide gibs 29a and lower guide gibs 29b provided on the rear side of the auger 26. Above and below the auger 26, a driving sprocket 30 (a lower sprocket of the present invention) provided at the lower end of the lower leader 21 and a driven sprocket 31 (an upper sprocket of the present invention) provided on the top sheave 24. Both ends of the elevating chain 32 bridged between them are respectively attached. The chain type elevating device 27 drives the driving sprocket 30 by a hydraulic motor, and moves the elevating chain 32 wound around the driving sprocket 30 and the driven sprocket 31 in the vertical direction, so that the auger is moved along the leader 14. A chain cover 33 for preventing the lifting chain 32 from coming off the driven sprocket 31 is attached to the top of the top sheave 24.

Note that the upper guide give 29a and the lower guide give 29b are
Each is fixed by six guide gib fastening bolts 34 on the left and right sides.

  Further, as shown in FIG. 4, the reader 14 can be lowered over the base machine to be in the transporting posture. However, the leader 14 can be disassembled or augmented due to restrictions on the loading mass of transport trailers, trucks, and the like. 26 may need to be removed. A known method can be used for removing the reader 14. Hereinafter, a method of attaching and detaching the auger 26 according to the present invention will be described. More specifically, a method of detaching the auger 26 from the reader 14 will be described with reference to FIGS. 5 to 18, and a method of attaching the auger 26 to the reader 14 will be described with reference to FIGS. 19 to 26.

  First, a guide gib hook attaching process for attaching the guide gib hooks 40 to the upper guide gib 29a and the lower guide gib 29b will be described with reference to FIGS. As shown in FIG. 5, the auger 26 is lowered to the lowest position with the reader 14 standing upright, and then the guide gib fastening bolts 34 are removed leaving only the upper and lower two bolts (see FIG. 5).

  The guide give hook 40 has an L-shape bent into a long side portion 41a extending in the axial direction of the reader 14 and a short side portion 41b extending in the width direction of the reader 14 when a round metal rod is attached. The hook 41 and a base 42a (which is parallel to the upper surfaces of the guide gibs 29a and 29b) protruding forward of the reader 14 when the plate-shaped metal piece joined to the short side of the hook 41 is attached. 14, an L-shaped mounting piece 42 bent into a standing piece 42b that rises in the axial direction; It is formed of a plate-like connecting piece 44 that connects the insertion pin 43 and the end of the long side 41a of the hook 41. The base 42a of the mounting piece 42 is provided with an insertion hole 42c through which a mounting bolt 45 screwed onto the upper surface of each of the guide gibs 29a and 29b is inserted. Further, the standing piece 42b is provided with a locking hole 42d for hanging a hook, a rope, or the like.

  The guide give hook 40 first inserts the insertion pin 43 into the bolt hole to which the third guide give fastening bolt 34 from the top of each guide give 29a, 29b is fastened, and inserts the through hole 42c provided in the base 42a of the mounting piece 42. The bolts are aligned with the bolt holes provided on the upper surfaces of the guide gibs 29a and 29b, and the mounting bolts 45 are screwed together to be mounted.

  After attaching the guide give hook 40, the hydraulic piping and wiring to the auger 26 are removed, and the lower guide 25 is removed from the drive sprocket cover 37. Further, the up-and-down cylinder 15 is shortened, and the reader 14 is lowered above the base machine 13.

  Next, a description will be given of a chain stopper mounting process for fixing the lifting chain mounted on the upper and lower sides of the auger 26 on the upper side and the lower side with reference to FIGS.

  First, as shown in FIG. 9, the auger 26 is raised by about 300 mm along the reader 14 to take out the lower elevating chain 32, and the eyebolt 26 a provided at the upper part of the auger 26 and the attachment provided at the lower part are attached. The auger 26 can be suspended by hanging the crane wire 35 on the piece 26b.

  Next, the chain adjusting bolt 36 connecting the chain 32 to the lower side of the auger 26 is loosened, the upper chain stopper 50 is attached to the upper end of the intermediate first member 22a, and the lower chain stopper 60 is attached to the lower leader 21 and the drive sprocket cover. The chain 32 is fixed by being attached to the connection portion with the chain 37. The upper chain stopper 50 can be attached to the bolt attaching / detaching concave portion 22d, which is a working space for attaching and detaching the leader members, and as shown by the imaginary line in FIG. It may be attached to the lower end of the member 22a, and the attachment position can be appropriately selected.

  Here, the structure of the upper chain stopper 50 and the lower chain stopper 60 will be described with reference to FIGS.

  The structure of the upper chain stopper 50 is disclosed in FIGS. 10 to 14, and more specifically, in FIGS. 12 to 14. The upper chain stopper 50 has a fixing portion main body 51 for fixing the chain 32, and holding portions 52, 52 connected to both side portions of the fixing portion main body 51 and holding the guide pipe 28.

  The fixing portion main body 51 has a U-shaped base 53 formed by a top plate portion 53a and a side wall portion 53b hanging from both ends of the top plate portion 53a so that the lower side (leader 14 side) at the time of mounting is opened. A fixing piece 54 protruding from the lower surface of the top plate 53a and having a U-shaped groove corresponding to the roller 32a of the elevating chain 32; a handle 55 provided on the upper surface of the top plate 53a; A substantially L-shaped connecting portion 56 that is provided at the intermediate portion and connects the grip portions 52 is formed.

  The grip portion 52 grips the guide pipe 28 by combining and joining two L-shaped plate members 52a and 52b to form a U-shaped space opened on one side. The holding portion 52 further includes a reinforcing plate 57 joined to both ends, two bolt insertion holes 52c provided on one side of an L-shaped plate member 52b protruding upward, three wires for inserting a wire 35, and the like. And a hanging insertion hole 52d.

  When the lifting chain 32 is fixed to the upper side of the auger 26 using the upper chain stopper 50, first, the fixing portion main body 51 is inserted from above, and the roller 32a is clamped by the fixing piece 54. Next, the grip portion 52 is inserted from both sides so as to grip the guide pipe 28, and the coupling bolt 58 a is inserted through both bolt insertion holes 52 c in a state where the bolt insertion holes 52 c are aligned with the bolt insertion holes 56 a formed in the connecting portion 56. The fixing portion main body 51 and the holding portion 52 are connected to each other through the holes 52c and 56a and connected by the connecting nut 58b.

  When the upper chain stopper 50 is not used as a chain stopper, the upper chain stopper 50 can also be used as a leader hanging tool using the hanging insertion hole 52d.

  The structure of the lower chain stopper 60 is disclosed in FIGS. The lower chain stopper 60 has a top plate 61 formed by bending a substantially Y-shaped plate into a cross section of “F”, and protrudes from the bent portion of the top plate 61 downward (toward the reader 14) during mounting. And a fixing piece 62 having a U-shaped groove corresponding to the roller 32a of the elevating chain 32 and joined in a substantially T-shape.

  A handle 63 is provided on the upper surface of the top plate portion 61, and a long hole 64 for bolt insertion is formed at both ends of the Y-shape.

  When the lifting chain 32 is fixed to the lower side of the auger 26 using the lower chain stopper 60, the lower chain stopper 60 is first inserted from above, and the roller 32a is clamped by the fixing piece 62. Next, with the long hole 64 and the mounting hole 37a provided on the front surface of the drive sprocket cover 37 aligned, the lower bolt 70 is fixed by inserting the mounting bolt 65. The attachment hole 37a may be used for fixing the lower guide 25.

  Next, as shown in FIG. 17, in a state where the auger 26 is suspended by the wire 35, a lifting / lowering chain separating step of separating the lifting / lowering chain 32 from the auger 26 is performed. The upper side of the auger 26 is separated from the side attached to the auger 26 by a portion of a plate 32b with a red marker at the tenth link, and the lower side of the auger 26 is separated by a portion of a chain adjustment bolt 36. And separate.

  Further, the guide gib fastening bolt 34 left on the upper guide gib 29a and the lower guide gib 29b is removed, and a guide gib removing step for removing the guide gibs 29a and 29b is performed. At this time, by having the hook portion 41 of the guide give hook 40, work with high operability can be performed.

  Thereafter, the auger 26 is lifted by a crane (auger lifting step), and is placed on a sleeper 38 as shown in FIG. In order to transport both the auger 26 and the pile driver 11, the ends of the elevating chain 32 and various pipes are cured, and the removal of the auger 26 is completed.

  Next, a method of attaching the auger 26 to the reader 14 will be described with reference to FIGS.

  First, as shown in FIG. 19, the auger 26 is hung by a crane, placed on the reader 14 in a lying state (auger hanging step), and the auger guide 70 for temporary mounting is attached (auger guide attaching step). .

  As shown in FIGS. 20 and 21, the auger guide 70 is formed by bending a flat plate twice at a right angle to have a substantially Z-shaped cross section. The auger guide 70 extends along the mounting piece 70a attached to the auger 26 and the guide pipe 28. It is formed from a bent cover part 70b.

  A handle 71 is provided at the center of the mounting piece 70a, and a bolt insertion hole for inserting the mounting bolt 72 is formed at both ends.

  The auger guide 70 is aligned with the position where the upper guide gib 29a is mounted, and the bolt insertion holes provided on the mounting piece 70a are aligned with the upper and lower bolt insertion holes for mounting the upper guide gib 29a. The guide 70 is attached to the auger 26.

  Thereafter, as shown in FIG. 22, the elevating chain 32 connected to the auger 26 and the elevating chain 32 fixed to the reader 14 are connected at the plate 32b, and the lower side of the auger 26 is The adjusting bolt 36 is tightened to connect the lifting chain 32 to the lifting chain 32 (a lifting chain connecting step). Further, the upper chain stopper 50 and the lower chain stopper 60 are removed (chain stopper removing step). Then, the auger 26 is moved to the lowermost end of the reader 14, and the suspension from the crane is released.

  In this state, as shown in FIG. 23, the undulating cylinder 15 is extended, and the reader 14 is erected.

  Next, as shown in FIG. 24, the lower guide give 29b is attached, the guide give hooks 40 are removed, and all the guide give fastening bolts 34 are fastened to fix the lower guide give 29b. Next, the auger guide 70 and the upper guide give 29a are similarly replaced (guide give attachment process).

  Then, by attaching the lower guide 25 to the front surface of the drive sprocket cover 37, the work can be performed as shown in FIG. 25, and the mounting of the auger 26 is completed.

  By such a process, the attachment and detachment of the auger 26 can be performed safely. Furthermore, the support jigs for attachment and detachment, such as the guide give hook 40, the respective chain stoppers 50 and 60, and the auger guide 70, have relatively simple structures and can be easily manufactured. No special modification is required for the punching machine.

  The number and position of division of each leader member are arbitrary, and the structure and shape of each part are also arbitrary, and can be applied to various pile driving machines.

11: pile driver, 12a: traveling part, 12b: upper revolving unit, 13: base machine, 14: leader, 15: undulating cylinder, 15a: cylinder rod, 16: front bracket, 17: cylinder mounting part, 17a: bearing Piece, 17b: through hole, 18: pipe support member, 19: support shaft, 21: lower leader, 22: intermediate leader, 22a: intermediate first member, 22b: intermediate second member, 22c: cylinder bracket, 22d: concave portion , 23 ... upper leader, 23a ... upper first member, 23b ... upper second member, 24 ... top sheave, 25 ... lower guide, 26 ... auger, 26a ... eyebolt, 26b ... mounting piece, 27 ... lifting device, 28 ... Guide pipe, 29a Upper guide give, 29b Lower guide give, 30 Drive sprocket, 31 Driven sprocket, 32 Lifting chain, 32 ... Roller, 32b ... Plate with red marker, 33 ... Chain cover, 34 ... Guide gib fastening bolt, 35 ... Wire, 36 ... Chain adjustment bolt, 37 ... Cover for drive sprocket, 37a ... Mounting hole, 38 ... Sleeper, 40 ... Guide gib hook, 41 ... Hook, 41a ... Long side, 41b ... Short side, 42 ... Mounting piece, 42a ... Base, 42b ... Standing piece, 42c ... Inserting hole, 42d ... Locking hole, 43 ... Insertion pin, 44 ... connecting piece, 45 ... mounting bolt, 50 ... upper chain stopper, 51 ... fixed part main body, 52 ... gripping part, 52a, 52b ... plate material, 52c ... bolt insertion hole, 52d ... hanging insertion hole, 53 base, 53a top plate, 53b side wall, 54 fixing piece, 55 handle, 56 connecting part, 56a bolt insertion hole, 57 reinforcing plate, 58a connecting bolt, 58b Coupling nut, 60: lower chain stopper, 61: top plate, 62: fixing piece, 63: handle, 64: elongated hole, 70: auger guide, 70a: mounting piece, 70b: cover, 71: handle, 72 ... Mounting bolts

Claims (4)

A leader provided at the front of the base machine is supported by an up / down cylinder so as to be able to be raised and lowered, and an auger is mounted on the reader so as to be able to move up and down. At the top and bottom of the auger, both ends of an elevating chain that extends over an upper sprocket attached to the upper end of the leader and a lower sprocket provided at the lower end of the leader are attached. In the method of attaching and detaching the auger of a pile driver,
When attaching / detaching the auger,
A guide giving hook attaching step of attaching a guide giving hook to the guide give of the auger,
A chain stopper attaching step of attaching a chain stopper for fixing the elevating chain attached above and below the auger to a leader,
An elevating chain separating step of separating the elevating chain from the auger,
A guide give removal step of removing the guide give from the auger,
An auger lifting step of lifting the auger from the leader. When mounting the auger,
An auger hanging step of hanging the auger on the reader,
An auger guide attaching step of attaching an auger guide to the auger,
An elevating chain connecting step of connecting the elevating chain above and below the auger,
A chain stopper removing step of removing the chain stopper,
The method for attaching and detaching an auger of a pile driver according to claim 1, further comprising: a guide give mounting step of changing the auger guide from the auger guide to the guide give. A leader provided at the front part of the base machine is supported by an up / down cylinder so as to be able to rise and fall, and an auger is attached to the leader so as to be able to move up and down. At the top and bottom of the auger, both ends of an elevating chain that extends over an upper sprocket attached to the upper end of the leader and a lower sprocket provided at the lower end of the leader are attached. A jig for supporting the attachment and detachment of the auger of the pile driver,
The jig has a guide gib hook functioning as a handle when removing the guide gib, and a chain stopper for fixing the elevating chain to a leader,
The guide give hook has a hook portion functioning as a handle during work, and an insertion pin inserted into an insertion hole for a guide give fastening bolt,
The chain stopper includes an upper chain stopper that fixes an elevating chain on the upper side of the auger, and a lower chain stopper that fixes an elevating chain on a lower side of the auger,
The upper side chain stopper has a fixed portion for holding the roller of the elevating chain, and a holding portion provided on both sides of the fixed portion for holding the guide pipe,
The support jig for attaching / detaching an auger, wherein the lower side chain stopper has a fixing portion for holding the roller of the elevating chain and a mounting portion attached to a lower end portion of the reader.   An auger attaching / detaching method for a pile driver according to claim 1 or 2, wherein the auger attaching / detaching support jig according to claim 3 is used.

Images