JP7165590B2 - Pile driver and transportation method for the pile driver - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile driver, and more particularly to a pile driver that can be transported without being disassembled by laying down the leader for transportation, and a method for transporting the pile driver.

Conventionally, construction machines such as pile drivers and earth drills have been used at construction sites where steel pipe piles are buried and ground improvement is performed. Heavy objects such as leaders and augers are removed from the upper revolving structure and transported separately from the base machine. On the other hand, a small pile driver that can be transported without being disassembled can be placed in a transportation posture with the leader tilted backwards, so that it can be placed on a low-floor trailer or other transportation vehicle to achieve a height that is not restricted to transportation. satisfies the A drive rod rack (cradle) that can support the drive rod attached to the auger is used as a jig to protect each part of such a small pile driver from impact and vibration during transportation. (See Patent Document 1, for example). When transporting a pile driver equipped with a relatively large auger among small pile drivers, the auger should be lowered to the lower leader in advance, and then the upper leader should be separated from the lower leader. It is possible to reduce the height dimension by tilting it backward (see, for example, Patent Document 2).

JP 2015-137466 A JP 2015-178733 A (Fig. 3)

However, in the pile driver described in the above-mentioned Patent Document 2, even if the size of the auger is increased, the transport posture can be made compact in the height direction. Since the auger protrudes upward beyond the total height, it has been troublesome to remove the drive rod from the auger each time it is transported. Moreover, since the removed drive rod is in an unstable situation, it is necessary to separately arrange a truck for transportation, resulting in high costs.

Therefore, the present invention provides a pile driver equipped with a drive rod holder that can easily fix the drive rod at a transportation position, contributes to safety during transportation, and reduces transportation costs, and a transportation method for the pile driver. intended to provide.

In order to achieve the above object, the pile driver of the present invention comprises a base machine in which an upper revolving body is rotatably provided on an upper part of a lower traveling body, and a leader which is provided in front of the upper revolving body so as to be able to rise and fall. an auger that ascends and descends along the leader; a drive rod that is rotatably and axially movably inserted through the auger; and a chuck mechanism that regulates axial movement of the drive rod that is inserted through the auger. WHEREIN: With the leader laid down backward and horizontal, the drive rod removed from the auger is held behind the upper revolving body and along the lower surface of the leader. A drive rod holder is provided, and a counterweight mounting portion protrudes from the lower rear end of the upper rotating body. The counterweight mounted on the counterweight mounting portion is held by the drive rod holder on the upper surface of the counterweight. Further, a receiving portion for supporting one end of the drive rod is provided .

Also , the leader is provided with a pair of suspension ears in the longitudinal direction, and the drive rod holder is connected to each suspension ear by a pin, and is composed of a front side bracket and a rear side bracket that hold the drive rod. Both brackets are characterized in that they can be lifted so as to separate the drive rod from the receiving portion as the leader is raised.

Further, the drive rod is provided with a chuck groove that can be engaged with the chuck mechanism, and at least one of the front side bracket and the rear side bracket is engaged with the chuck groove to move the drive rod. An engaging portion for restricting movement in an axial direction is provided, and at least one of the front side bracket and the rear side bracket is a temporary placement frame on which the drive rod can be placed. In addition, the bolt insertion hole corresponds to the position of the bolt insertion hole provided in the transportation rack having a height different from that of the temporary storage rack. It is characterized by being provided as

At least one of the front side bracket and the rear side bracket is provided with an elastic body capable of coming into contact with the peripheral surface of the drive rod. A fixing member is provided for engaging with one end of the drive rod to fix the position of the drive rod.

Further, a method of transporting a pile driver of the present invention comprises a base machine having an upper revolving body rotatably provided on an upper portion of a lower traveling body, a leader undulatingly provided at a front portion of the upper revolving body, and the base machine. An auger that moves up and down along a leader, a drive rod that is rotatably and axially movably inserted through the auger, and a chuck mechanism that restricts axial movement of the drive rod that is inserted through the auger. A detachable pile driver in which the drive rod removed from the auger is held behind the upper revolving body and along the lower surface of the leader with the leader laid down backward and horizontal. In a method for transporting a pile driver having a drive rod holder, the drive rod is placed horizontally on a temporary placement frame arranged behind the upper revolving structure, and the leader is laid down backward. arranging the lower surface of the leader and the drive rod in parallel proximity; attaching the drive rod retainer to the leader to hold the drive rod along the lower surface of the leader; It is characterized in that the step of mounting the rod on the carrier of the transport vehicle by self-running while the rod is held by the drive rod holder is carried out in sequence.

According to the present invention, in a state in which the leader is laid down backward and horizontal, the drive rod is held by the drive rod holder behind the upper revolving structure and along the lower surface of the leader. In addition to being able to carry out the operation easily while in the house, it becomes possible to transport the main body of the pile driver and the drive rod as a unit, thereby reducing transportation costs. In particular, since the drive rod is held at a suitable height from the ground, there is no risk of hindering the running of the vehicle during loading into the transport vehicle or delivery to the site. Since the width dimension can be satisfied, safety during transportation is also ensured.

In addition, since one end of the drive rod held by the drive rod holder is supported by the receiving portion provided on the upper surface of the counterweight, the load acting on the drive rod holder is reduced and the size of the drive rod holder is reduced. and weight reduction can be achieved.

1 is a side view showing a working posture in which a leader is erected, showing one embodiment of the pile driver of the present invention. FIG. FIG. 10 is a side view of the essential parts showing a state in which the leader is laid down and the drive rod is held on the lower surface of the leader by the drive rod holder. 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. FIG. 3 is a sectional view taken along IV-IV in FIG. 2; FIG. 3 is a cross-sectional view taken along the line VV of FIG. 2; FIG. 3 is a sectional view taken along line VI-VI of FIG. 2; FIG. 11 is an explanatory diagram showing a state in which the drive rod is similarly arranged behind the upper revolving structure; It is an explanatory view showing a state in which the leader is similarly laid down and arranged close to the drive rod. FIG. 11 is an explanatory diagram showing a state in which the drive rod is similarly held on the lower surface of the leader by mounting the drive rod holder. FIG. 11 is an explanatory diagram showing the operation of loading the vehicle on the platform of the transportation vehicle while holding the drive rod. It is similarly explanatory drawing which shows the state during transportation.

1 to 11 are diagrams showing one embodiment of the pile driver of the present invention. As shown in FIG. 1, the pile driver 11 has a base machine 14 comprising a lower traveling body 12 having crawlers 12a and an upper revolving body 13 rotatably provided on the lower traveling body 12. , a leader 15 erected on the front portion of the upper revolving body 13, and a leader hoisting cylinder 16 for supporting the leader 15 from behind. A front bracket 17 that supports the leader 15 so that it can be raised and lowered is provided at the front of the upper rotating body 13, and a piping support member 18 that supports hydraulic piping is provided above the front of the upper rotating body 13. ing. Further, an operation room 19 is provided on the right side of the upper rotating body 13, and an equipment room 20 containing an engine and a hydraulic unit is provided on the left side. Jack cylinders 21 are provided at four locations on the front, back, left, and right of the upper revolving body 13, respectively, and a counterweight mounting portion 22 projecting from the lower rear end of the upper revolving body 13 is used to balance the base machine 14 during work. A plurality of counterweights 23 for taking weight are mounted in a stacked state.

The reader 15 includes a basic reader 25 rotatably attached to a support shaft 24 provided on the front bracket 17 in the width direction of the base machine, an upper reader 26 connected to the upper part of the basic reader 25, and a basic reader 26. 25, and a lower reader 27 connected to the lower part of 25. Further, the upper reader 26 is divided into an upper first member 26a, an upper second member 26b, and an upper third member 26c. These leader members are connected by flange members at the upper and lower ends, and are detachable using bolts and nuts.

A top sheave block 28 is arranged at the upper end of the upper leader 26, and a detachable anti-vibration member 29 is arranged at the front of the lower part of the lower leader 27, respectively. A pair of left and right guide pipes 31 are provided continuously over the entire length of the reader 15 at the front ends of both side surfaces of a rack member 30 which is one of the components of the device. Further, a pair of suspension ears 32, 33 are provided in the longitudinal direction on the rear surface of the upper third member 26c of the upper leader 26, and each suspension ear 32, 33 has a drive rod holder, which will be described later. It is detachable.

The auger 34 is provided with a pair of left and right guide gibs 35 that protrude rearward and are in sliding contact with the guide pipe 31, and a pair of left and right pinions that mesh with the racks provided on both sides of the rack member 30 are applied by hydraulic pressure for elevating the auger. It moves up and down along the reader 15 by being rotationally driven by the motor 36 . In addition, the auger 34 is rotatably and axially movably inserted through the drive rod 37, and selects one of chuck grooves 37a provided at two locations in the longitudinal direction of the drive rod 37 and extends it below the auger 34. The axial movement of the drive rod 37 is restricted by engaging the provided chuck mechanism 38, and the output mechanism 39 is applied with the auger driving hydraulic pressure while the square shaft portion 37b is engaged with the output mechanism 39. Drive rod 37 is rotated by being driven by motor 40 .

When the pile driver 11 is used at a construction site, for example, a steel pipe pile 41 is used as a construction member, and the upper end of the steel pipe pile 41 is connected via a cap rod 42 provided at the lower end of the drive rod 37. be. On the other hand, when transporting the pile driver 11, the anti-vibration member 29 is removed from the leader 15, and the lower leader 27 and the basic leader 25 are separated while the auger 34 is supported by the lower leader 27. 2, the portion above the basic leader 25 is laid down rearward to a horizontal state. By laying the top sheave block 28 backward, the total height can be kept within the height limit on the loading platform of the transport vehicle. At this time, the drive rod 37 removed from the auger 34 is held behind the upper revolving structure 13 and along the lower surface of the leader 15 using the drive rod holder 43. carried to the carrier.

The drive rod retainer 43 consists of a front bracket 46 and a rear bracket 47 that are attached to each hanging ear 32, 33 using fixing pins 44, 45, respectively, and both brackets 46, 47 are attached to the center of gravity of the drive rod 37. It is configured to simultaneously hold the lower side (front side) and the upper side (rear side) in the axial direction across. In this holding state, the lower end of the drive rod 37, in other words, the one end 37c located in front of the front bracket 46 is supported by the block-shaped receiving portion 48 provided on the upper surface of the counterweight 23. That is, it is held at a position where it does not protrude rearward beyond the top sheave block 28 corresponding to the rear end of the fuselage by moving forward along the lower surface of the leader 15 toward the upper revolving body 13 side.

Each of the brackets 46 and 47 is formed by bending a steel plate to make it small and lightweight so that it can be handled manually. As shown in FIG. 3, the front side bracket 46 includes a substantially U-shaped bracket body 49 that can be hung by sandwiching the lower part of the peripheral surface of the drive rod 37 from below, and an open portion of the bracket body 49 that closes the drive shaft. It is composed of a substantially U-shaped pressing member 50 capable of coming into contact with the upper peripheral surface of the rod 37 . Further, on the inner arcuate surface of the bracket body 49, the drive rod 37 is engaged with and supported by the chuck groove 37a, and in this supported state, a substantially U-shaped groove that restricts the movement of the drive rod 37 in the axial direction. is provided with an engaging portion 49a. Further, the pressing member 50 is provided with a rubber 50a which is an elastic body having an arcuate surface capable of coming into contact with the circumferential surface of the chuck groove 37a. As a result, both end portions 49b, 49b of the bracket body 49 are inserted into the bifurcated portions 32a, 32a of the left and right hanging ears 32, 32, respectively, and the engaging portion 49a is engaged with the chuck groove 37a, and the pressing member 50 is arranged. As a result, the peripheral surface of the chuck groove 37a is held by the engaging portion 49a and the rubber 50a, and the fixing pin 44 is inserted through the pin insertion holes 32b, 49c, and 50b provided in the overlapping portions of the respective members. By doing so, the lower side (front side) of the drive rod 37 is held by the front side bracket 46 .

As shown in FIG. 4, the rear bracket 47 includes a substantially U-shaped bracket body 51 that can be hung by sandwiching the lower peripheral surface of the drive rod 37 from below, and a bracket body 51 that closes the open part of the bracket body 51. It is composed of a substantially U-shaped pressing member 52 capable of coming into contact with the upper peripheral surface of the drive rod 37 . The bracket main body 51 and the pressing member 52 are provided with rubbers 51a and 52a, which are elastic bodies having arcuate surfaces capable of coming into contact with the peripheral surface of the drive rod 37, respectively. As a result, both ends 51b, 51b of the bracket main body 51 are inserted into the bifurcated portions 33a, 33a of the left and right hanging ears 33, 33, respectively, and the pressing member 52 is arranged, so that the rubbers 51a, 52a move the drive rod 37. By inserting the fixing pin 45 into the pin insertion holes 33b, 51c, and 52b provided in the overlapped portions of the respective members, the upper side (rear side) of the drive rod 37 is turned to the rear side. It is held by a bracket 47 .

In addition, the rear bracket 47 has flanges 51d, 51d for bolt connection on the lower left and right sides of the bracket body 51, and can be attached to and detached from the upper surface of the temporary placement base 55 with bolts 53 and nuts 54 at four locations on the front, rear, left, and right. It has become. This makes it possible to support the upper portion (rear side) of the drive rod 37 with the rear bracket 47 while the rear bracket 47 is bolted to the temporary placement frame 55 in advance. At this time, since the lower side (front side) of the drive rod 37, that is, the one end 37c is supported by the receiving portion 48, the mounting of the brackets 46 and 47 is performed with the axis of the drive rod 37 substantially horizontal. (Fig. 2). In addition, since the mounting on the transportation vehicle is self-propelled, the rear side bracket 47 and the temporary placement frame 55 are once separated on the ground and then reassembled on the loading platform, or the height is different from the temporary placement frame 55. is replaced by the transport cradle 56 of the Therefore, in the temporary storage stand 55, the intervals (pitch) of the four bolt insertion holes on the front, back, left and right are provided corresponding to the positions of the bolt insertion holes in the transportation stand 56, and the bolts 53 and nuts 54 are used.

By the way, since the drive rod 37 is heavy, it is desirable that it be held more stably during transportation. Therefore, the upper surface of the counterweight 23 is provided with a fixing member 57 that engages with one end portion 37c of the drive rod 37 to fix the position of the drive rod 37. As shown in FIG. As shown in FIG. 5, the fixing member 57 includes a substantially inverted U-shaped holder 58 that is bolted to the upper surface of the receiving portion 48 by sandwiching the upper peripheral surface of one end 37c of the drive rod 37 from above. 6, it comprises a projecting stopper 59 capable of contacting the one end 37c of the drive rod 37 in the axial direction. As a result, with the one end 37c of the drive rod 37 in contact with the stopper 59, the receiving part 48 and the holder 58 are integrally engaged with the flange-like engaging part 37d provided on the peripheral surface of the one end 37c. The drive rod 37 is thereby fixed (FIG. 2).

Here, a method for transporting the pile driver 11 will be described with reference to FIGS. 7 to 11. FIG. First, as shown in FIG. 7, the temporary placement frame 55 to which the rear bracket 47 is attached in advance is arranged behind the upper rotating body 13, and the drive rod 37, which is horizontally hung using the hanging wire 60 of the crane, is lowered. and placed horizontally across the receiving portion 48 on the upper surface of the counterweight 23 and the rear bracket 47 . At this time, the drive rod 37 is restricted from protruding rearward by engaging the engaging portion 37d with the receiving portion 48, and the position in the front-rear direction is determined. A space for mounting 59 is secured. Next, as shown in FIG. 8, the upper leader 26 is laid down backward, and the lower surface of the upper leader 26 and the drive rod 37 are arranged in parallel and close to each other. Here, regarding the rear bracket 47 , the pressing member 52 is arranged on the upper peripheral surface of the drive rod 37 and pinned by the fixing pin 45 , and the upper side (rear side) of the drive rod 37 is attached to the rear bracket 47 . Let it be held (Fig. 4).

Subsequently, the front side bracket 46 is pin-connected by the fixing pin 44 in a state in which the chuck groove 37a of the drive rod 37 located directly below the suspension ear 32 is sandwiched from above and below by the bracket body 49 and the pressing member 50. Then, the lower side (front side) of the drive rod 37 is held by the front bracket 46 (FIG. 3). As a result, as shown in FIG. 9, the drive rod 37 is held by both the brackets 46 and 47 without losing its balance even when the temporary placement frame 55 is removed. It can be mounted on the loading platform of the transportation vehicle while being kept along the lower surface of 15.例文帳に追加

Subsequently, after the jack cylinder 21 in the grounded state is contracted and moved to the rear of the loading platform 62 of the transport vehicle 61 by self-running, as shown in FIG. A distance from the loading platform 62 is secured. At this time, as the leader 15 is raised, the brackets 46 and 47 are separated from the receiving portion 48 of the drive rod 37 and lifted obliquely. It is held in a state of being engaged with the engaging portion 49a. As a result, the drive rod 37 will not drop off even if the leader 15 swings up and down and further tilts during loading onto the transport vehicle 61 . Then, as shown in FIG. 11, the jack cylinder 21 is grounded on the loading platform 62 of the transport vehicle 61, the leader 15 is raised and lowered, and the drive rod 37 is bridged between the receiving part 48 and the transport platform 56. Place horizontally. At this time, the transportation platform 56 is positioned on the upper surface of the traction frame 63 that is kicked up from the loading platform 62 and extends in the traveling direction, specifically, at a position that is substantially directly above the coupling device (coupler) 65 mounted on the tractor 64. , and after adjusting the position corresponding to the rear side bracket 47, they are connected to each other with bolts and nuts. Finally, the holder 58 and the stopper 59 are attached to fix the one end 37c of the drive rod 37, and the drive rod 37 is transported to the destination in this state.

In this way, with the leader 15 laid down rearward and horizontal, the drive rod 37 is held behind the upper rotating body 13 and on the lower surface of the leader 15 by the front side bracket 46 and the rear side bracket 47 that constitute the drive rod holder 43 . Since the piling machine is held along the line, the setup before transportation can be easily performed while on the ground, and the main body of the pile driver 11 and the drive rod 37 can be transported integrally, thereby reducing the transportation cost. can be done. In particular, since the drive rod 37 is held at an appropriate height above the ground, there is no risk of hindering the traveling of the transport vehicle 61 during loading or delivery to the site. Since the width and width dimensions can be satisfied, safety during transportation is also ensured.

Further, since one end 37c of the drive rod 37 held by the front bracket 46 and the rear bracket 47 is supported by the receiving portion 48 provided on the upper surface of the counterweight 23, the load acting on both brackets 46 and 47 is reduced. Therefore, it is possible to reduce the size and weight of these parts.

Further, the front side bracket 46 and the rear side bracket 47 are pin-coupled to hanging ears 32 and 33 provided in pairs in the longitudinal direction of the leader 15, respectively, so that the drive rod 37 can be lifted as the leader 15 is raised. , the inclination of the drive rod 37 can be adjusted with a simple operation, in addition to being advantageous in terms of working efficiency and strength. That is, this configuration enables quick and safe loading on the transport vehicle 61 . In addition, due to the structure of the crawler type traveling body, the vehicle body becomes unstable when it climbs over a step. Therefore, the drive rod 37 can be stably held against the vertical movement (inclination) of the leader 15 due to the difference in level during loading. In particular, in a site with a narrow carry-in entrance, there are cases where the carry-in is carried out by self-running with the undulating angle of the reader 15 set at, for example, 45 degrees or more with respect to the ground. However, even in such a case, the drive rod 37 can be securely held on the lower surface of the leader 15 without falling off.

Further, in the held state, the drive rod 37 is elastically supported by the rubbers 50a, 51a, 52a provided on both brackets 46, 47, thus preventing the drive rod 37 from rattling during loading and transportation. Furthermore, since one end portion 37c of the drive rod 37 is fixed by the holder 58 and the stopper 59 that constitute the fixing member 57, it is possible to transport the drive rod 37 in a more secure state.

In this embodiment, the drive rod retainer is composed of a plurality of components including the front bracket and the rear bracket having different shapes, but these brackets may have the same shape. In this case, each bracket may be provided with an engaging portion that engages with the chuck groove of the drive rod and a bolt insertion hole for the mount. In addition, as long as the drive rod can be held along the lower surface of the leader, it may be composed of a single component, and its mounting position and mounting method are arbitrary. In addition, the temporary placement stand and the transport stand have the same spacing between the bolt insertion holes for attaching the rear brackets, which enhances usability. If the structure is easy, the cost is low. In addition, the shape of a receiving portion that supports one end of the drive rod and fixing members such as holders and stoppers can be changed as appropriate. Also, although rubber is used as the elastic body for supporting the drive rod, it is not particularly limited, and a wide range of materials such as metal materials and resin materials can be used.

DESCRIPTION OF SYMBOLS 11... Piling machine, 12... Lower traveling body, 12a... Crawler, 13... Upper revolving body, 14... Base machine, 15... Leader, 16... Elevating cylinder, 17... Front bracket, 18... Piping support member, 19... Operation Chamber 20 Equipment room 21 Jack cylinder 22 Counterweight mounting portion 23 Counterweight 24 Support shaft 25 Basic leader 26 Upper leader 26a Upper first member 26b Upper first member 2 members, 26c... upper third member, 27... lower leader, 28... top sheave block, 29... anti-vibration member, 30... rack member, 31... guide pipe, 32... suspension ear, 32a... bifurcated portion, 32b... pin Insertion hole 33 Hanging ear 33a Bifurcated portion 33b Pin insertion hole 34 Auger 35 Guide gib 36 Hydraulic motor for auger elevation 37 Drive rod 37a Chuck groove 37b Square shaft , 37c...one end portion, 37d...engaging portion, 38...chuck mechanism, 39...output mechanism, 40...hydraulic motor for driving auger, 41...steel pipe pile, 42...cap rod, 43...drive rod holder, 44, 45 Fixing pin 46 Front bracket 47 Rear bracket 48 Receiving part 49 Bracket main body 49a Engagement part 49b End part 49c Pin insertion hole 50 Pressing member 50a Rubber , 50b... Pin insertion hole 51... Bracket main body 51a... Rubber 51b... End 51c... Pin insertion hole 51d... Flange 52... Pressing member 52a... Rubber 52b... Pin insertion hole 53... Bolt 54... Nut, 55... Temporary placement platform, 56... Transportation platform, 57... Fixing member, 58... Holder, 59... Stopper, 60... Suspension wire, 61... Transportation vehicle, 62... Loading platform, 63... Traction frame, 64... Tractor , 65 ... coupling device

Claims (8)

A base machine in which an upper revolving body is rotatably provided on an upper part of a lower traveling body, a leader provided in a front part of the upper revolving body so as to be able to rise and fall, an auger that moves up and down along the leader, and a rotation on the auger A pile driver comprising a drive rod inserted movably in the axial direction and a chuck mechanism for restricting axial movement of the drive rod inserted in the auger, wherein the leader is tilted backward. a detachable drive rod holder for holding the drive rod removed from the auger in a horizontal state along the rear side of the upper rotating body and along the lower surface of the leader ;
A counterweight mounting portion protrudes from the lower rear end of the upper rotating body, and one end of the drive rod held by the drive rod holder is attached to the upper surface of the counterweight mounted on the counterweight mounting portion. A pile driver characterized by being provided with a receiving part for supporting . The leader is provided with a pair of suspension ears in the longitudinal direction, and the drive rod retainer comprises a front bracket and a rear bracket that are pin-coupled to each suspension ear to hold the drive rod. 2. The pile driver according to claim 1 , wherein the bracket is configured to lift the drive rod away from the receiving portion as the leader is raised. The drive rod is provided with a chuck groove that can be engaged with the chuck mechanism, and at least one of the front side bracket and the rear side bracket engages with the chuck groove to move the drive rod axially. 3. The pile driver according to claim 2 , further comprising an engaging portion for restricting the movement of the pile driver. At least one of the front side bracket and the rear side bracket is provided with a bolt insertion hole for bolting to a temporary placement frame on which the drive rod can be placed. Or the pile driver according to 3 . 5. The pile driver according to claim 4 , wherein the bolt insertion holes are provided corresponding to the positions of the bolt insertion holes provided in the transport rack having a height different from that of the temporary placement rack. 6. The bracket according to any one of claims 2 to 5 , wherein at least one of the front side bracket and the rear side bracket is provided with an elastic body capable of coming into contact with the peripheral surface of the drive rod. Pile driver as described. 7. The counterweight according to any one of claims 1 to 6 , wherein the upper surface of the counterweight is provided with a fixing member that engages with one end of the drive rod to fix the position of the drive rod. pile driver. A base machine in which an upper revolving body is rotatably provided on an upper part of a lower traveling body, a leader provided in a front part of the upper revolving body so as to be able to rise and fall, an auger that moves up and down along the leader, and a rotation on the auger A pile driver comprising a drive rod inserted movably and axially through the auger and a chuck mechanism for restricting axial movement of the drive rod inserted through the auger, wherein the leader is laid backward. a detachable drive rod holder for holding the drive rod removed from the auger behind the upper revolving body and along the lower surface of the leader in a horizontal state. In the transportation method, the steps of horizontally placing the drive rod on a temporary placement frame arranged behind the upper revolving structure, and laying down the leader backward so that the lower surface of the leader and the drive rod are parallel to each other. attaching the drive rod retainer to the leader to retain the drive rod along the lower surface of the leader; and while the drive rod is retained by the drive rod retainer, A method of transporting a pile driver, characterized in that the step of mounting the pile driver on a carrier of a transport vehicle by self-propelled operation is sequentially performed.

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