JP5905254B2 - Pile driver - Google Patents

Description

  The present invention relates to a pile driver, and more particularly, to a large pile driver in which a pair of rotating arms each provided with a front jack at the tip are rotatably provided on both sides of a leader bracket in the vehicle body width direction.

  The large pile driver will exceed the transport standard in the assembled work state, so it is disassembled into a lower traveling body and an upper turning body, and each is transported separately using a large low floor trailer. (For example, refer to Patent Document 1).

JP-A-4-31507

  However, especially when the upper swing body is large and heavy on a large pile driver, remove the leader bracket from the upper swing body, disassemble the main body of the upper swing body and the leader bracket, Had to be transported separately using low floor trailers.

  Since transportation with a large low-floor trailer is costly, it is possible to transport a relatively light weight leader bracket with an ordinary truck, but in the case of a large pile driver, the width of the leader bracket is a regular truck. May not fit within the transport range.

  For example, as shown in FIG. 7, the leader bracket 41 has a pair of rotating arms 44, 44 each having a front jack 43 at the front end via rotating pins 42, 42 on both sides in the vehicle body width direction. Are pivotally connected to each other. In the case of a large pile driver, an open / close cylinder 45 for rotating the rotating arm 44 to a predetermined position during work is provided with a first bracket 46 welded to the outer surface of the leader bracket 41 and an outer side of the rotating arm 44. Some are arranged between the second bracket 47 welded to the side surface. In the case of the leader bracket 41 having such an opening / closing cylinder 45, the first bracket 46 obstructs the rotation of the rotating arm 44, and even if the opening / closing cylinder 45 is removed, the rotating arm 44 is attached to the leader bracket 41. It was not possible to rotate it to the rear. Therefore, even when one of the rotating arms 44 is rotated to the front limit position of the leader bracket 41, the other rotating arm 44 protrudes greatly to the side of the leader bracket 44. W2 could not be reduced to a width (2350 mm) or less that can be transported by truck, and the leader bracket 41 had to be transported using a large low-floor trailer. Although it is possible to remove one of the rotating arms 44 and transport it, the work of attaching and detaching the rotating arm 44, which is a large component including the front jack 43, is increased, resulting in an increase in work cost.

  Therefore, the present invention can reduce the minimum width dimension of the leader bracket having the open / close cylinder that rotates the rotating arm having the front jack at the tip to a width dimension that can be transported by truck with a simple operation. The purpose of the present invention is to provide a pile driver that can reduce transportation costs.

In order to achieve the above object, the pile driving machine of the present invention is provided with a leader bracket that supports the leader at the front of the upper swinging body that is pivotably provided on the upper part of the lower traveling body, and the vehicle width direction of the leader bracket is A pair of rotating arms each provided with a front jack at the front end are rotatably provided on both sides, and first brackets respectively projecting from outer side surfaces of both sides of the leader bracket in the vehicle body width direction are provided with the rotating arms. In the pile driving machine provided at a position where the first bracket comes into contact with the outer side surface of the rotating arm when rotated backward, each of the rotating arms opens and closes to rotate the rotating arm to the outer side. with each cylinder, said opening and closing cylinder, before Symbol a first bracket is provided between the second bracket to protrude from the outer surface of said each time Doude, wherein at least one of opening and closing the cylinder first Burake Thereby detachably connected to one one of the bets and the second bracket and, one of the first bracket, it is characterized in that detachably installed in the reader bracket.

  According to the pile driving machine of the present invention, the rotating arm can be sufficiently rotated rearward of the vehicle body by removing one of the opening / closing cylinder and the first bracket connecting the opening / closing cylinder during transportation. Thereby, since the minimum width dimension of a leader bracket can be made below into the width dimension which can be conveyed with a truck, the reduction of transportation cost can be aimed at.

It is a principal part top view of the pile driver which shows one example of this invention. It is a principal part side view similarly. It is explanatory drawing which shows the state of the leader bracket at the time of transportation similarly. It is a top view of a pile driver similarly. It is a side view of a pile driver similarly. It is explanatory drawing which shows the state of the leader bracket at the time of transport which shows another form example. It is explanatory drawing which shows the state at the time of the transport in the conventional leader bracket.

  1 to 5 show an example of a pile driving machine according to the present invention. In this pile driving machine 11, an upper turning body 13 can turn on an upper part of a lower traveling body 12 provided with a crawler 12a. Is provided. A leader bracket 16 to which a leader 14 and a front jack 15 are attached is provided at the front part of the upper swing body 13, and the leader 14 standing on the leader bracket 16 is supported by two backstays 17 and 17. ing. A rear jack 18, a counterweight 19, and an outrigger box 21 to which the generator mounting table 20 is attached are provided at the rear part of the upper swing body 13.

  The leader bracket 16 includes a pair of connecting arms 16a and 16a projecting from the rear end portion toward the main body portion of the upper swing body 13, and a leader holding portion 16b provided at the front end portion. Rotating arms 23 and 23 are attached so as to be rotatable in the horizontal direction via rotating pins 22 and 22, and the front jacks 15 and 15 are provided at the tips of the respective rotating arms 23.

  An open / close cylinder 24 that rotates the rotating arm 23 and a fixing member 25 that fixes the rotating arm 23 in a state where the rotating arm 23 is rotated to a predetermined operating position are attached to the outer side of the rotating arm 23. Yes. In the open / close cylinder 24, the base end of the cylinder body 24a protrudes from the first bracket 26 protruding from the outer surface of the leader bracket 16, and the distal end of the piston 24b protrudes from the second bracket 27 protruding from the outer surface of the rotating arm 23. Each is detachably connected. The fixing member 25 is detachably connected to the third brackets 28 and 28 whose both ends protrude from the outer surface of the rotating arm 23. When the rotating arm 23 is opened, one end of the fixing member 25 is 3 is removed from the bracket 28 and connected to a fourth bracket 29 protruding from the outer surface of the leader bracket 16 to keep the rotating arm 23 open.

  The second bracket 27 and the third brackets 28 and 28 are fixed to the outer surface of the rotating arm 23 by welding, and the fourth bracket 29 is fixed to the outer surface of the leader bracket 16 by welding. One first bracket 26 that connects one open / close cylinder 24 is detachably attached to the outer surface of the leader bracket 16 by a plurality of bolts 26 a, and the other first bracket that connects the other open / close cylinder 24. 26 is fixed to the outer surface of the leader bracket 16 by welding or bolts.

  The front jack 15 includes a jack cylinder 15a attached to the tip of the rotating arm 23, a cylinder rod 15b protruding downward from the lower end of the jack cylinder 15a, and a grounding plate 15c attached to the lower end of the cylinder rod 15b. Have.

  The pile driver 11 formed in this way is transported from the upper turning body 13 from which the lower traveling body 12 is separated, to the leader 14, the back stay 17, the leader bracket 16, the rear jack 18, the counterweight 19, The generator mounting table 20 and the outrigger box 21 are removed and mounted on a truck or trailer for transport.

  As shown in FIG. 3, the leader bracket 16 removes both the fixing members 25 from the third brackets 28, 28, then removes the opening / closing cylinder 24 from one of the first bracket 26 and the second bracket 27, and 26a is removed and one first bracket 26 is removed. Next, one of the rotating arms 23 is fully rotated around the rotating pin 22 toward the rear of the vehicle body. As a result, the minimum width W1 of the leader bracket 16 can be made smaller than the width dimension that can be transported by truck, and the leader bracket 16 can be transported by placing it on the truck bed. The transportation cost can be greatly reduced compared with the case of transportation. Moreover, workability | operativity can be improved compared with the case where the rotation arm 23 is attached or detached.

  FIG. 6 shows another embodiment of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the leader bracket 16 shown in this embodiment, the position of one third bracket 31 provided on one rotating arm 23 and the position of one fourth bracket 32 provided on the leader bracket 16 is rotated. In a state where the pin 22 is pivoted fully toward the rear of the vehicle body, they are arranged at positions that overlap each other and connected to insertion holes 31a and 32a formed in the third bracket 31 and the fourth bracket 32, respectively. Pins can be inserted. Thereby, since the rotation arm 23 can be reliably fixed to the position of a transportation state, the stability at the time of transportation can be improved.

  The present invention is not limited to the above-described embodiments. Both the first brackets 26 are detachably attached to the leader bracket 16 with bolts, and both the opening and closing cylinders are connected to the first bracket and the second bracket. Alternatively, it may be detachably connected. Further, the direction of the opening / closing cylinder 24 may be reversed.

  DESCRIPTION OF SYMBOLS 11 ... Pile driver, 12 ... Lower traveling body, 12a ... Crawler, 13 ... Upper turning body, 14 ... Leader, 15 ... Front jack, 15a ... Jack cylinder, 15b ... Cylinder rod, 15c ... Ground plate, 16 ... Leader bracket , 16a ... connecting arm, 16b ... reader holding part, 17 ... back stay, 18 ... rear jack, 19 ... counterweight, 20 ... generator mounting base, 21 ... outrigger box, 22 ... rotating pin, 23 ... rotating arm 24 ... Open / close cylinder, 24a ... cylinder body, 24b ... piston, 25 ... fixing member, 26 ... first bracket, 26a ... bolt, 27 ... second bracket, 28 ... third bracket, 29 ... fourth bracket, 31 ... 2nd bracket, 31a ... insertion hole, 32 ... bracket, 32a ... insertion hole

Claims (1)

A pair of pivots with a front bracket at the front end of the leader bracket on the both sides of the leader bracket in the vehicle width direction is provided at the front of the upper swinging body provided on the upper part of the lower traveling body. Arms are provided so as to be pivotable, and when the pivoting arms are pivoted rearward from the first brackets protruding from the outer side surfaces of both sides of the leader bracket in the vehicle body width direction, the first brackets are In a pile driver provided at a position that contacts the outer surface of the rotating arm ,
Wherein each time Doude comprises a closing cylinder for rotating the rotating arm to the outer portion, respectively, the opening and closing cylinder, before Symbol a first bracket, the second bracket to protrude from the outer surface of said each time Doude It is provided between, while detachably connecting at least one of opening and closing the cylinder on one and the one and the second bracket of the first bracket, one of the first bracket and detachably mounted to said reader bracket A pile driver characterized by that.

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