JP2010047995A - Leader changing method of pile driver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leader changing method of a pile driver capable of efficiently changing a leader of a pile driver provided with a chain-type hoisting device between one of standard specifications and another of short-length specifications and improving workability. <P>SOLUTION: The leader is divided into a lower leader 21; an intermediate leader 22; and an upper leader 23 mounted to an upper part of a base machine. When the upper leader 23, the intermediate leader 22; a rolling cylinder 15 are to be removed and replaced, they are removed and replaced with the leader and the rolling cylinder supported by a cylinder support 37, leader supports 38 and 39, and a leader fixing arm 40. When the lower leader 21, the intermediate leader 22, and the upper leader 23 are to be connected and released from connection, a hoising chain 32 is appropriately temporarily fastened to an upper part of the leader by a chain stopper 36 and adjusted to a length according the specifications of the leader. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a leader recombination method for a pile driver, and more specifically, a reader provided with a chain-type lifting device that lifts and lowers a working device mounted on the reader by a lifting chain is recombined into a long reader and a short reader. Regarding the method.

In recent years, there has been an increase in the number of cases where pile driving work is performed at places where the height is limited, such as under bridges or in factories. Therefore, a pile driver equipped with a short leader is required, and a standard long leader is provided. Proposal has been made of a pile driver that can be used as a short leader. As a method of recombination of leaders, a dedicated short leader and short undulation cylinder are prepared separately from the long leader and long undulation cylinder, and a set of leader and undulation cylinder is recombined, or a long reader is shortened. However, there is a method in which the long leader is rearranged for the short length and the long undulation cylinder is replaced with the short length undulation cylinder. For example, in a pile driving machine equipped with a rack and pinion type lifting device, a leader is connected to a lower leader attached to the front part of the base machine and an upper part of the lower leader, and is connected to the front part of the base machine. The intermediate reader is provided so as to be pivotable, and the upper reader is connected to the upper portion of the intermediate reader and has a connecting portion of the undulating cylinder. When the reader is replaced, the lower reader and the intermediate reader A reader recombination method in which a reader support and an undulating cylinder can be efficiently recombined by attaching a reader support between them and supporting the upper side of the intermediate reader and supporting the undulating cylinder by a cylinder support installed in the base machine. Has been proposed (see, for example, Patent Document 1).
JP 2007-182716 A

  However, in the above-mentioned Patent Document 1, although it is effective as a leader recombination method of a pile driving machine equipped with a rack and pinion type lifting device, a pile driving machine equipped with a chain type lifting device The rack and pinion type cannot be separated from the leader and the intermediate leader, and the intermediate leader cannot be laid down on the base machine. The recombination method could not be applied to the recombination of the leader of a pile driver equipped with a chain type lifting device.

  Therefore, the present invention provides a pile driver that can efficiently recombine a leader of a pile driving machine equipped with a chain type lifting device into a long reader and a short reader, thereby improving workability. It is an object of the present invention to provide a reader recombination method for a machine.

  In order to achieve the above-described object, the method of replacing a leader of a pile driving machine according to the present invention is such that a leader provided at the front portion of a base machine is supported by a hoisting cylinder so that it can be raised and lowered, and is mounted on the leader so as to be lifted and lowered. The leader and the undulation cylinder of the pile driving machine are moved up and down by an elevating chain that spans an upper sprocket attached to the upper end of the leader and a lower sprocket provided at the lower end of the leader. In a leader recombination method for a pile driving machine recombined with an undulating cylinder, the leader is rotatably attached to the front portion of the base machine via a support shaft in the width direction provided at the front portion of the base machine. The undulating cylinder is divided into a lower leader and an upper leader member connected to the upper part of the lower leader, and the working device is lowered to the lower leader. The leader and the undulating cylinder are tilted upwards of the base machine with the support shaft as a rotation center, and between the front part of the base machine below the support shaft and the lower part of the inclined lower leader. A reader support is attached and the leader is held in an inclined state, and the upper leader member and the upper sprocket are attached and detached while the elevating chain is temporarily fixed by a chain stopper in the inclined state, and the leader after the upper leader member is attached and detached The hoisting cylinder is replaced according to the length of the hoisting chain and the length of the elevating chain is adjusted.

Further, a leader provided at the front part of the base machine is supported by a hoisting cylinder so that it can be raised and lowered. In the leader recombination method of the pile driver that recombines the leader and the undulation cylinder of the pile driver that is raised and lowered by the raising and lowering chain spanned with the lower sprocket provided,
The reader is connected to the rear surface of a lower reader rotatably attached to the front portion of the base machine via a support shaft in the width direction provided at the front portion of the base machine, and connected to the upper portion of the lower reader. From a long reader having an intermediate leader to which a hoisting cylinder is connected, and a long upper reader connected to the upper part of the intermediate leader and having the upper sprocket attached to the upper end thereof, the upper part of the lower leader When replacing the undulation cylinder from the long undulation cylinder to the short undulation cylinder,
Lowering the working device to a lower leader;
A step of shortening the undulation cylinder for elongate and inclining the leader together with the undulation cylinder above the base machine with the support shaft as a rotation center;
Removing one end of the lifting chain connected to the upper side of the working device, removing the lifting chain from the upper sprocket, and removing the upper sprocket from the upper leader;
After releasing the connection between the upper reader and the intermediate reader in a state where the upper reader is suspended and held, the upper reader is lifted and removed from the intermediate reader, and a chain stopper is attached to the upper end of the intermediate reader to A temporary fixing stage,
Installing a cylinder support in the base machine;
Attaching a leader support to the front part of the base machine below the support shaft;
Suspending the lower part of the lower reader and maintaining the inclined state of the connecting body between the lower reader and the intermediate reader, removing the undulating cylinder from the rear surface of the intermediate reader, and supporting the undulating cylinder by the cylinder support;
Supporting the lower part of the lower reader with the reader support;
While the intermediate reader is suspended and held, the connection between the intermediate reader and the lower reader is released, the chain stopper is removed from the upper end of the intermediate reader, the intermediate reader is lifted and removed from the lower reader, and the upper end of the lower reader is removed. Attaching a chain stopper to temporarily fix the elevating chain, and adjusting the elevating chain to a length corresponding to a short reader,
After removing the long undulation cylinder from the base machine, attaching the short undulation cylinder to the base machine and supporting it by the cylinder support;
Suspending a short upper reader, sending the elevating chain into the upper reader, attaching a chain stopper to the upper end of the upper reader and temporarily fixing the elevating chain pulled out from the upper end of the upper reader;
Removing the chain stopper from the upper end of the upper leader for a short length, attaching an upper sprocket to the upper end of the upper leader, hanging a lifting chain around the upper sprocket, and connecting one end to the upper side of the working device;
Connecting a relief cylinder to the rear surface of the upper leader;
And a step of removing the leader support and the cylinder support from the base machine in a state where a short leader connected to the lower leader and the upper leader is supported by a short hoisting cylinder.

Further, a leader provided at the front part of the base machine is supported by a hoisting cylinder so that it can be raised and lowered. In the leader recombination method of the pile driver that recombines the leader and the undulation cylinder of the pile driver that is raised and lowered by the raising and lowering chain spanned with the lower sprocket provided,
The reader is connected to the rear surface of a lower reader rotatably attached to the front portion of the base machine via a support shaft in the width direction provided at the front portion of the base machine, and connected to the upper portion of the lower reader. From the long reader having an intermediate leader to which the hoisting cylinder is connected and a long upper reader connected to the upper part of the intermediate leader and having the upper sprocket attached to the upper end, only the lower leader is used. When changing the undulation cylinder from the undulation cylinder for the long to the undulation cylinder for the short,
Lowering the working device to a lower leader;
A step of shortening the undulation cylinder for elongate and inclining the leader together with the undulation cylinder above the base machine with the support shaft as a rotation center;
Removing one end of the lifting chain connected to the upper side of the working device, removing the lifting chain from the upper sprocket, and removing the upper sprocket from the upper leader;
After releasing the connection between the upper reader and the intermediate reader while the upper reader is suspended and held, the upper reader is lifted and removed from the intermediate reader, and a chain stopper is attached to the upper end of the intermediate reader to A temporary fixing stage,
Installing a cylinder support in the base machine;
Attaching a leader support to the front part of the base machine below the support shaft;
Suspending the lower part of the lower reader and maintaining the inclined state of the connecting body between the lower reader and the intermediate reader, removing the undulating cylinder from the rear surface of the intermediate reader, and supporting the undulating cylinder by the cylinder support;
Supporting the lower part of the lower reader with the reader support;
While the intermediate reader is suspended and held, the connection between the intermediate reader and the lower reader is released, the chain stopper is removed from the upper end of the intermediate reader, the intermediate reader is lifted and removed from the lower reader, and the upper end of the lower reader is removed. Attaching a chain stopper to temporarily fix the elevating chain, and adjusting the elevating chain to a length corresponding to a short reader,
After removing the long undulation cylinder from the base machine, attaching the short undulation cylinder to the base machine and supporting it by the cylinder support;
Removing the chain stopper from the upper end portion of the lower leader and attaching an upper sprocket to the upper end portion of the lower leader, suspending an elevating chain around the upper sprocket, and connecting one end to the upper side of the working device;
Connecting a relief cylinder to the rear surface of the lower leader;
And a step of removing the leader support and the cylinder support from the base machine in a state where a short-length leader consisting of only a lower leader is supported by a undulating cylinder for short length.

  According to the reader recombination method of the pile driver of the present invention, when the reader is recombined, the lower leader that is rotatably attached to the front part of the base machine is supported by the reader support. It is not necessary to support the lower leader in a tilted state with a crane or the like when attaching or detaching the leader, and the undulating cylinder is supported by the cylinder support. Therefore, even if the connection between the undulating cylinder and the leader is released, the undulating cylinder Will not fall on the base machine. In addition, the lifting chain can be prevented from entering the leader or hindering the work by temporarily fixing the lifting chain with a chain stopper when the leader is recombined.

  FIG. 1 to FIG. 24 show an example of the reader recombination method of the pile driver according to the present invention, and the leader of the pile driver is changed from the standard long specification (standard reader) to the short specification (short reader). It is explanatory drawing which shows each step.

  First, FIG. 1 thru | or FIG. 3 has shown the state at the time of the operation | work of the pile driver provided with the standard leader. The pile driving machine 11 includes a base machine 13 including a traveling unit 12a provided with a crawler, and an upper revolving body 12b that is turnable on the traveling unit 12a, and a front portion of the base machine 13. A standard reader 14 that can be raised and lowered and a raising and lowering cylinder 15 for a standard reader that supports the standard reader 14 from the rear are provided. A front bracket 16 is provided at the front of the base machine 13 so as to support the standard leader 14 so as to be raised and lowered. A cylinder mounting portion 17 is provided on the front bracket 16 so that the base of the raising and lowering cylinder 15 is rotatably attached. ing. Further, a pipe support member 18 that supports hydraulic pipes is provided above the front portion of the base machine 13.

  The standard reader 14 includes a lower reader 21 rotatably attached to a support shaft 19 provided in the front bracket 17 in the width direction of the base machine, an intermediate reader 22 connected to an upper portion of the lower reader 21, The intermediate reader 22 is divided into an upper reader 23 connected to the upper portion of the intermediate reader 22, and the intermediate reader 22 is divided into an intermediate first member 22a and an intermediate second member 22b. The member 23a and the upper second member 23b are divided and formed. Each of these leader members is detachably connected by a flange member using bolts and nuts.

  The tip of the cylinder rod 15a of the hoisting 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 reader 23, and a lower guide 25 is mounted on the lower end of the lower reader 21, and a working device 26 such as an auger drive device can be moved up and down on the front surface of the standard reader 14. And a chain type lifting device 27 for lifting the working device 26 is provided.

  The working device 26 moves up and down along the standard reader 14 in a state where a pair of guide pipes 28 provided on both sides of the standard reader 14 are gripped by guide gibbs 29 provided on the rear side of the working device 26. Are attached to both ends of a lifting chain 32 spanned between a driving sprocket 30 provided at the lower end of the lower leader 21 and a driven sprocket 31 provided on the top sheave 24. . The chain-type lifting device 27 drives the drive sprocket 30 with a hydraulic motor, and moves the lifting chain 32 wound around the drive sprocket 30 and the driven sprocket 31 in the vertical direction along the standard leader 14. A chain cover 33 for preventing the lifting chain 32 from being detached from the driven sprocket 31 is attached to the upper portion of the top sheave 24.

  In order to replace the standard leader 14 provided in the pile driver 11 with a short-length leader, first, the working device 26 is lowered to the lower part of the lower leader 21, and then the hoisting cylinder 15 is shortened to The standard leader 14 is tilted above the base machine 13 together with the undulating cylinder 15. Next, one end of the raising / lowering chain 32 connected to the upper side of the working device 26 is removed, and after removing the chain cover 33 from the upper part of the top sheave 24, the raising / lowering chain 32 is removed from the driven sprocket 31, and the top together with the driven sprocket 31 is removed. The sheave 24 is removed from the upper leader 23. Next, the suspension members 34 and 34 are attached to both ends of the upper leader 23, respectively, and the intermediate reader 22 is attached to the suspension members 34 and 34 with the crane wire 35 held so as not to fall. The connection with the upper reader 23 is released. Then, the crane is operated so that the upper leader 23 is slightly separated from the intermediate leader 22, and the chain stopper 36 is inserted into the intermediate portion of the lifting chain 32 that appears between the intermediate leader 22 and the upper leader 23, The chain stopper 36 is attached to the upper end portion of the intermediate reader 22 to temporarily fix the elevating chain 32 to prevent the elevating chain 32 from being pulled into the intermediate reader 22, and then, as shown in FIG. Lift up and remove.

  As shown in FIG. 5, the chain stopper 36 includes an engaging portion 36 a that engages with the flange portion at the upper end of the leader member, and an engaging rod 36 b that is inserted between the pins of the elevating chain 32. By inserting the rod 36b between the pins of the lifting chain 32 and engaging the engaging portion 36a with the upper flange portion at the upper end of the leader member, the locking rod 36b penetrates between the pins of the lifting chain 32 and is locked. The lower end portion of 36b abuts on the upper end surface of the leader member and restricts the movement of the lifting chain 32. The raising / lowering chain 32 temporarily fixed by the chain stopper 36 is extracted downward from the upper leader 23 while maintaining the length of the standard leader 14, and the upper side of the chain is temporarily placed at an appropriate position behind the base machine.

  From this state, as shown in FIG. 6, the undulating cylinder 15 is extended to erect the connected lower leader 21 and intermediate leader 22, open the upper space of the base machine 13, and the upper surface of the base machine 13 at a predetermined position on the upper surface. The cylinder support 37 is installed in The cylinder support 37 includes a cylinder receiving portion 37 a having an angle corresponding to the inclination angle of the undulating cylinder 15, and a leg portion 37 b that holds the cylinder receiving portion 37 a at a predetermined height. The leg portion 37 b is an upper surface of the base machine 13. In addition, it is fixed by appropriate fixing means such as bolt connection and concave-convex fitting. The shape of the cylinder support 37 is only required to support the undulation cylinder 15 for the standard cylinder and the undulation cylinder for the short leader at a predetermined angle, and can be arbitrarily set according to the state of the upper surface of the base machine 13 and the like.

  Next, as shown in FIG. 7, the raising and lowering cylinder 15 is shortened until it comes into contact with the cylinder support 37, and the lower leader 21 and the intermediate leader 22 connected together with the raising and lowering cylinder 15 are lowered above the base machine 13. Then, the first leader support 38 and the second leader support 39 are attached to the front part of the base machine below the support shaft 19. As shown in FIGS. 8 and 9, the first reader support 38 is fixed to the front surface of the base machine 13, and the second reader support 39 is interposed via a first elastic member 38 a provided at the tip of the first reader support 38. A second elastic member 39 a is connected to the tip of the second reader support 39. Further, an arm attachment portion 38b for attaching a base portion of a reader fixing arm 40 used for fixing the lower reader 21 as described later is provided at the lower end of the first reader support 38. The front end surfaces of the first elastic member 38a and the second elastic member 39a are provided with an angle corresponding to the inclination angle of the lower reader 21 so as to contact the rear surface of the lower reader 21 in a state inclined at a predetermined angle. Yes.

  After the leader support 38 is attached to the front surface of the base machine 13 in this way, as shown in FIG. 10, the crane wire 35 is connected to the lower side of the lower leader 21, for example, the lower guide 25, and the lower guide 25 is suspended. While holding the connected lower leader 21 and intermediate leader 22 in an inclined state, the connection between the cylinder rod 15a of the hoisting cylinder 15 and the cylinder bracket 22c provided on the rear surface of the intermediate second member 22b is released, The undulating cylinder 15 is supported by the cylinder support 37.

  Next, as shown in FIG. 11, the lower end portion of the lower leader 21 that is auxiliary suspended is lowered so that the lower rear surface of the lower reader 21 is brought into contact with the second elastic member 39 a, and the lower leader is supported by the reader support 38. 21 is restricted from rotating in the standing direction, and a locking piece 40a provided at the tip of the fixed leader fixing arm 40 is inserted into the lower end opening of the guide pipe 28 so that the base portion of the leader fixing arm 40 is connected to the arm. By attaching to the attachment part 38b, the rotation of the lower reader 21 in the lying down direction is restricted.

  Next, as shown in FIG. 12, after the crane wire 35 is changed from the lower guide 25 to the suspenders 34 and 34 attached to both ends of the intermediate leader 22, the lower leader 21 and the intermediate leader 22 are connected. At the same time, the chain stopper 36 that temporarily holds the elevating chain 32 is moved from the upper end of the intermediate reader 22 to the upper end of the lower reader 21, and the elevating chain 32 is temporarily fixed to the upper end of the lower reader 21 by the chain stopper 36. In this state, the intermediate reader 22 is lifted and removed from the lower reader 21.

  By completing the above-described steps, the pile driving machine 11 is in a state in which the upper leader 23 and the intermediate leader 22 constituting the standard leader 14 are all removed. As a result, the upper portion of the hoisting cylinder 15 is opened, so that the hoisting cylinder 15 supported by the cylinder support 37 is lifted and removed from the base machine 13 as shown in FIG. The length is adjusted according to the reader 50. As a result, only the lower leader 21 is attached to the front portion of the base machine 13.

  For example, as shown in FIG. 14, the hoisting cylinder 15 includes a mounting portion 15 b provided at a base portion of the hoisting cylinder 15 between a pair of bearing pieces 17 a and 17 a provided to protrude from the cylinder mounting portion 17 of the front bracket 16. The cylinder mounting shaft 41 is inserted into a through hole provided in the bearing pieces 17a, 17a and the mounting portion 15b so that the cylinder mounting shaft 41 can be raised and lowered. When the undulating cylinder 15 is removed, the cylinder mounting shaft 41 is slid toward the one bearing piece 17a, and the cylinder mounting shaft 41 is removed from the through hole of the mounting portion 15b, whereby the bearing pieces 17a and 17a and the undulating cylinder 15 are removed. And the base of the undulation cylinder 15 can be extracted from between the bearing pieces 17a and 17a. Moreover, the workability | operativity at the time of attaching / detaching the raising / lowering cylinder 15 can be improved by keeping the cylinder attachment axis | shaft 41 in the state attached to the one bearing piece 17a. Further, the outer member of one bearing piece 17a and the cylinder mounting shaft 41 are provided with through holes 17b and 41a for inserting retaining pins for retaining the cylinder mounting shaft 41, respectively.

  Next, as shown in FIG. 15, a undulation cylinder 51 having a length corresponding to a short reader is suspended, and the base portion is rotatably attached to the cylinder attachment portion 17, and the upper side is supported by the cylinder support 37. Then, as shown in FIG. 16, while the upper leader 52 having a short length is suspended, the elevating chain 32 is fed into the upper leader 52, and the elevating chain 32 is moved to the upper end of the upper leader 52 by the chain stopper 36. While temporarily fixing, the lower end part of the upper reader | leader 52 and the lower reader | leader 21 are connected, and the short specification reader | leader (short reader | leader) 50 is formed.

  Then, as shown in FIG. 17, the chain stopper 36 is removed from the upper end portion of the upper leader 52, and the elevating chain 32 is sent to the top sheave 53 while the short top sheave 53 is suspended above the upper leader 52. As shown in FIG. 18, the elevating chain 32 is wound around a driven sprocket 54 provided on the top sheave 53, and one end of the elevating chain 32 is connected to the upper side of the work device 26.

  Next, as shown in FIG. 19, a crane wire 35 is connected to the lower guide 25 and auxiliary suspended, and the second leader support 39 and the leader fixing arm 40 are removed from the first leader support 38. As shown, after the short reader 50 including the connected lower reader 21 and upper reader 52 is raised until the rear surface of the lower reader 21 contacts the first elastic member 38a of the first reader support 38, the first reader The leader fixing arm 40 is attached again to the arm attachment portion 38b of the reader support 38, and the locking piece 40a of the leader fixing arm 40 is inserted into the lower end opening of the guide pipe 28, whereby the undulation operation of the short reader 50 is performed. In addition to being regulated by the support 38 and the leader fixing arm 40, the hoisting cylinder 51 can be raised by the wire 35. And the ability of state.

  In this state, as shown in FIG. 21, the wire 35 of the crane is removed from the lower guide 25, the wire 35 is connected to the tip of the hoisting cylinder 51 supported by the cylinder support 37, and the hoisting cylinder 51 is raised. In addition, the cylinder rod 51 a of the hoisting cylinder 51 is extended, the tip of the cylinder rod 51 a is connected to a cylinder bracket 55 provided on the rear side of the top sheave 53, and the short leader 50 is supported by the hoisting cylinder 51. Then, as shown in FIG. 22, the wire 35 is removed from the hoisting cylinder 51, and the leader fixing arm 40 and the first leader support 38 are removed, so that the short leader 50 can be raised and lowered.

  As a result, the short leader 50 and the undulating cylinder 51 are mounted on the base machine 13. Finally, as shown in FIG. 23, the undulating cylinder 51 is extended to raise the short leader 50 vertically. By adjusting the tension of the elevating chain 32, construction using the short leader 50 is possible.

  As described above, in the pile driving machine 11 provided with the chain type lifting device, the stages shown in FIGS. 4 to 23 are sequentially performed from the state in which the standard leader 14 shown in FIGS. 1 to 3 is mounted. The standard reader 14 and undulation cylinder 15 can be recombined with the short reader 50 and undulation cylinder 51 by using only one crane.

  As shown in FIG. 24, the pile driving machine equipped with such a short leader 50 lowers the working cylinder 26 to the lower end of the lower leader 21 and then shortens the raising and lowering cylinder 51 to make the short leader 50 into the raising and lowering cylinder 51. At the same time, the vehicle can be transported by lying on the base machine 13. In this embodiment, the undulating cylinder 51 and the cylinder support 37 do not come into contact with each other in this transport state, so the cylinder support 37 is not removed from the base machine 13, but the cylinder support 37 is removed from the base machine 13. May be.

  FIGS. 25 to 33 show other embodiments of the present invention, and are explanatory diagrams showing each stage of recombination with a reader having a shorter specification than the above-described short reader 50. FIG. In addition, the same code | symbol is attached | subjected to what shows the component similar to the said example, and the detailed description is abbreviate | omitted.

  First, as shown in FIG. 25, instead of the short undulation cylinder 51 attached at the stage shown in FIG. 15 in the embodiment, a short undulation cylinder 61 having a length corresponding to a short specification reader is attached. . That is, the upper leader 23, the intermediate leader 22 and the undulating cylinder 15 are removed in the same manner as described above, and after adjusting the length of the lifting chain 32 temporarily fixed to the upper end of the lower leader 21 by the chain stopper 36, A short hoisting cylinder 61 shorter than the short hoisting cylinder 51 is suspended and a base portion is rotatably attached to the cylinder mounting portion 17, and an upper end portion is supported by the cylinder support 37.

  Next, as shown in FIG. 26, the chain stopper 36 is removed from the upper end portion of the lower leader 21, and the elevating chain 32 is moved to the top sheave while hanging the short sheave top sheave 53 similar to the above on the upper portion of the lower leader 21. 53, and hung around the driven sprocket 54, and one end of the lifting chain 32 is connected to the upper side of the working device 26. As shown in FIG. 27, the hoisting cylinder 61 is supported by the cylinder support 37, and the lower leader 21 is The first reader support 38, the second reader support 39, and the reader fixing arm 40 are fixed.

  Then, as shown in FIG. 28, a crane wire 35 is connected to the lower guide 25 and suspended, and the second leader support 39 and the leader fixing arm 40 are removed from the first leader support 38, and shown in FIG. As described above, after the lower reader 21 is erected until the rear surface of the lower reader 21 comes into contact with the first elastic member 38 a of the first reader support 38, the reader fixing arm 40 is attached to the arm attachment portion 38 b of the first reader support 38. Thus, the undulation operation of the lower reader 21 is restricted.

  In this state, as shown in FIG. 30, the crane wire 35 is removed from the lower guide 25, the wire 35 is connected to the tip of the hoisting cylinder 61 supported by the cylinder support 37, and the hoisting cylinder 61 is raised. At the same time, the cylinder rod 61 a of the hoisting cylinder 61 is extended, and the tip of the cylinder rod 61 a is connected to a cylinder bracket 55 provided on the top sheave 53. Then, as shown in FIG. 31, the wire 35 is removed from the distal end portion of the undulating cylinder 61, and the leader fixing arm 40 and the first leader support 38 are removed.

  Finally, as shown in FIG. 32, the hoisting cylinder 61 is extended to raise the lower leader 21 vertically and the tension of the elevating chain 32 is adjusted, so that the shortest state consisting only of the lower leader 21 is achieved. The work is ready for construction. Further, as shown in FIG. 33, the undulation cylinder 61 is shortened and the lower leader 21 is laid down on the base machine 13 together with the undulation cylinder 61, so that the transportation state can be achieved.

  Note that the pipe support member 18 may be placed on the base machine 13 as shown in FIGS. 24 and 33. Further, when rearranging the pile driver of the short specification leader into the pile driving machine of the standard leader specification as shown in FIGS. 1 to 3, the above steps may be reversed, as shown in FIGS. Recombination of the short length specification shown in FIG. 32 and the short length specification shown in FIGS. 32 and 33 can be easily performed by performing the steps in a predetermined order. Further, the number of divisions and division positions of each leader member are arbitrary, and the structure and shape of each part are also arbitrary. Further, as the undulation cylinder, a dedicated undulation cylinder for a short length may be used for each short leader structure, but for example, a two-stage telescopic cylinder may be used so as to be able to cope with a plurality of short leader structures.

It is a front view of a pile driver provided with a standard leader. It is a side view similarly. It is also a plan view. It is a front view which shows the step which fell the standard leader and removed the upper leader. It is explanatory drawing which shows the state which engaged the chain stopper with the leader member upper end. It is a front view which shows the step which installed the cylinder support on the base machine. It is a front view which shows the step which supported the raising / lowering cylinder with the cylinder support, and connected the 1st leader support and the 2nd leader support to the base machine. It is explanatory drawing which shows a 1st leader support, a 2nd leader support, and a reader | leader fixing arm to a base machine as an attachment-like body. It is IX-IX sectional drawing of FIG. It is a front view which shows the stage which suspended the lower guide. It is a front view which shows the step which cancelled | released connection with the raising / lowering cylinder and an intermediate | middle reader | leader, and supported the lower leader and the intermediate | middle reader | leader with the reader | leader support and the reader | leader fixing arm. It is a front view which shows the step which removed the intermediate leader from the lower leader. It is a front view which shows the step which removed the undulation cylinder from the base machine. It is XIV-XIV sectional drawing of FIG. It is a front view which shows the step which attached the raising / lowering cylinder for short leaders to the base machine, and was made to support by the leader support. It is a front view of the stage which connected the upper leader for short length readers to the lower leader. It is a front view which shows the step which connected the top sheave to the upper part of an upper leader. It is a front view which shows the step which connected the raising / lowering chain to the sprocket of a top sheave, and was connected with the working apparatus. It is a front view which shows the step which auxiliary-suspended the lower guide and removed the 2nd leader support and the leader fixing arm. It is a front view which shows the step which made the short leader stand upright, was supported by the 1st leader support, and the leader fixing arm was attached. It is a front view which shows the step which connected the cylinder bracket of the top sheave, and the cylinder rod of the raising / lowering cylinder. It is a front view which shows the step which removed the 1st leader support and the leader fixing arm from the base machine. It is a front view which shows the step which raises a short leader vertically and performs tension | tensile_strength adjustment of a raising / lowering chain. It is a front view which shows the step which made the short reader | leader the transportation state. It is a front view which shows the step which replaced the hoisting cylinder with the hoisting cylinder for leaders still shorter. It is a front view which shows the step which attached the top sheave to the upper part of a lower leader. It is a front view which shows the step which connected the raising / lowering chain to the sprocket of a top sheave, and was connected with the working apparatus. It is a front view which shows the step which auxiliary-suspended the lower guide and removed the 2nd leader support and the leader fixing arm. It is a front view showing a stage where a lower reader is raised and supported by a first reader support and a reader fixing arm is attached. It is a front view which shows the step which connected the cylinder bracket of the top sheave, and the cylinder rod of the raising / lowering cylinder. It is a front view which shows the step which removed the 1st leader support and the leader fixing arm from the base machine. It is a front view which shows the step which raises a lower leader vertically and performs tension adjustment of a raising / lowering chain. It is a front view which shows the step which made the lower leader the transportation state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Pile driver, 12a ... Traveling part, 12b ... Upper turning body, 13 ... Base machine, 14 ... Standard leader, 15 ... Hoisting cylinder, 15a ... Cylinder rod, 15b ... Mounting part, 16 ... Front bracket, 17 ... Cylinder Mounting portion, 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, 23 ... Upper leader, 23a ... Upper first member, 23b ... Upper second member, 24 ... Top sheave, 25 ... Lower guide, 26 ... Working device, 27 ... Lifting device, 28 ... Guide pipe, 29 ... Guide give, 30 ... Drive sprocket, 31 ... Driven sprocket, 32 ... Lifting chain, 33 ... Chain cover, 34 ... Suspension tool, 35 ... Wire, 36 ... Chain Stopper 37 ... Cylinder support 37a ... Cylinder receiving part 37b ... Leg part 38 ... First reader support 38a ... First elastic member 38b ... Arm attachment part 39 ... Second reader support 39a ... Second elasticity 40, leader fixing arm, 40a, locking piece, 41 ... cylinder mounting shaft, 41a ... through hole, 50 ... short leader, 51 ... undulating cylinder, 51a ... cylinder rod, 52 ... upper leader, 53 ... top sheave, 54 ... driven sprocket, 55 ... cylinder bracket, 61 ... undulating cylinder, 61a ... cylinder rod

Claims (3)

A leader provided at the front part of the base machine is supported by a raising and lowering cylinder by a raising and lowering cylinder, and a working device mounted on the leader to be movable up and down is provided at an upper sprocket attached to the upper end of the leader and a lower end of the leader In the leader recombination method of a pile driver that recombines the leader and the hoisting cylinder of the pile driver that is moved up and down by the lifting chain spanned over the lower sprocket, the leader of the pile driver is replaced with the leader and the hoisting cylinder of other specifications. It is divided into a lower leader that is rotatably attached to the front part of the base machine via a support shaft in the width direction provided at the front part of the base machine, and an upper leader member that is connected to the upper part of the lower leader The hoisting cylinder is shortened in a state where the working device is lowered to the lower leader, and the leader is rotated on the support shaft together with the hoisting cylinder. A leader support is attached between the front part of the base machine below the support shaft and the lower part of the lower leader in the inclined state so that the leader is held in an inclined state. While temporarily attaching the lifting chain with a chain stopper, the upper leader member and the upper sprocket are attached and detached, the hoisting cylinder is replaced according to the length of the leader after the upper leader member is attached and detached, and A leader recombination method of a pile driver characterized by adjusting a length. A leader provided at the front part of the base machine is supported by a raising and lowering cylinder by a raising and lowering cylinder, and a working device mounted on the leader to be movable up and down is provided at an upper sprocket attached to the upper end of the leader and a lower end of the leader. In the leader recombination method of the pile driver that recombines the leader and the undulation cylinder of the pile driving machine that is raised and lowered by the raising and lowering chain hung over the lower sprocket,
The reader is connected to the rear surface of a lower reader rotatably attached to the front portion of the base machine via a support shaft in the width direction provided at the front portion of the base machine, and connected to the upper portion of the lower reader. From a long reader having an intermediate leader to which a hoisting cylinder is connected, and a long upper reader connected to the upper part of the intermediate leader and having the upper sprocket attached to the upper end thereof, the upper part of the lower leader When replacing the undulation cylinder from the long undulation cylinder to the short undulation cylinder,
Lowering the working device to a lower leader;
A step of shortening the undulation cylinder for elongate and inclining the leader together with the undulation cylinder above the base machine with the support shaft as a rotation center;
Removing one end of the lifting chain connected to the upper side of the working device, removing the lifting chain from the upper sprocket, and removing the upper sprocket from the upper leader;
After releasing the connection between the upper reader and the intermediate reader in a state where the upper reader is suspended and held, the upper reader is lifted and removed from the intermediate reader, and a chain stopper is attached to the upper end of the intermediate reader to A temporary fixing stage,
Installing a cylinder support in the base machine;
Attaching a leader support to the front part of the base machine below the support shaft;
Suspending the lower part of the lower reader and maintaining the inclined state of the connecting body between the lower reader and the intermediate reader, removing the undulating cylinder from the rear surface of the intermediate reader, and supporting the undulating cylinder by the cylinder support;
Supporting the lower part of the lower reader with the reader support;
While the intermediate reader is suspended and held, the connection between the intermediate reader and the lower reader is released, the chain stopper is removed from the upper end of the intermediate reader, the intermediate reader is lifted and removed from the lower reader, and the upper end of the lower reader is removed. Attaching a chain stopper to temporarily fix the elevating chain, and adjusting the elevating chain to a length corresponding to a short reader,
After removing the long undulation cylinder from the base machine, attaching the short undulation cylinder to the base machine and supporting it by the cylinder support;
Suspending a short upper reader, sending the elevating chain into the upper reader, attaching a chain stopper to the upper end of the upper reader and temporarily fixing the elevating chain pulled out from the upper end of the upper reader;
Removing the chain stopper from the upper end of the upper leader for a short length, attaching an upper sprocket to the upper end of the upper leader, hanging a lifting chain around the upper sprocket, and connecting one end to the upper side of the working device;
Connecting a relief cylinder to the rear surface of the upper leader;
And a step of removing the leader support and the cylinder support from a base machine in a state where a short leader connected to the lower leader and the upper leader is supported by a short hoisting cylinder. Reader recombination method. A leader provided at the front part of the base machine is supported by a raising and lowering cylinder by a raising and lowering cylinder, and a working device mounted on the leader to be movable up and down is provided at an upper sprocket attached to the upper end of the leader and a lower end of the leader. In the leader recombination method of the pile driver that recombines the leader and the undulation cylinder of the pile driving machine that is raised and lowered by the raising and lowering chain hung over the lower sprocket,
The reader is connected to the rear surface of a lower reader rotatably attached to the front portion of the base machine via a support shaft in the width direction provided at the front portion of the base machine, and connected to the upper portion of the lower reader. From the long reader having an intermediate leader to which the hoisting cylinder is connected and a long upper reader connected to the upper part of the intermediate leader and having the upper sprocket attached to the upper end, only the lower leader is used. When changing the undulation cylinder from the undulation cylinder for the long to the undulation cylinder for the short,
Lowering the working device to a lower leader;
A step of shortening the undulation cylinder for elongate and inclining the leader together with the undulation cylinder above the base machine with the support shaft as a rotation center;
Removing one end of the lifting chain connected to the upper side of the working device, removing the lifting chain from the upper sprocket, and removing the upper sprocket from the upper leader;
After releasing the connection between the upper reader and the intermediate reader in a state where the upper reader is suspended and held, the upper reader is lifted and removed from the intermediate reader, and a chain stopper is attached to the upper end of the intermediate reader to A temporary fixing stage,
Installing a cylinder support in the base machine;
Attaching a leader support to the front part of the base machine below the support shaft;
Suspending the lower part of the lower reader and maintaining the inclined state of the connecting body between the lower reader and the intermediate reader, removing the undulating cylinder from the rear surface of the intermediate reader, and supporting the undulating cylinder by the cylinder support;
Supporting the lower part of the lower reader with the reader support;
While the intermediate reader is suspended and held, the connection between the intermediate reader and the lower reader is released, the chain stopper is removed from the upper end of the intermediate reader, the intermediate reader is lifted and removed from the lower reader, and the upper end of the lower reader is removed. Attaching a chain stopper to temporarily fix the elevating chain, and adjusting the elevating chain to a length corresponding to a short reader,
After removing the long undulation cylinder from the base machine, attaching the short undulation cylinder to the base machine and supporting it by the cylinder support;
Removing the chain stopper from the upper end portion of the lower leader and attaching an upper sprocket to the upper end portion of the lower leader, suspending an elevating chain around the upper sprocket, and connecting one end to the upper side of the working device;
Connecting a relief cylinder to the rear surface of the lower leader;
A leader recombination method for a pile driver comprising: a step of removing the leader support and the cylinder support from a base machine in a state where a short leader consisting of only a lower leader is supported by a short hoisting cylinder .

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