Wire rope winding configuration of pile driver

Abstract

To provide a wire rope winding configuration of a pile driver that reduces work.SOLUTION: In a wire rope winding configuration of a pile driver, out of a plurality of leader stands 33 arranged in a longitudinal direction to support a fallen leader 1, a work device sheave block 32 is attached to a leader stand 33A closest to a top sheave block 29. A leaving winch 36 on which a leaving wire rope 31 that is thinner than a lifting wire rope is wound is provided closer to a main winch 11 than the work device sheave block 32. The leaving wire rope 31 that is unwound from the leaving winch 36 and wound so as to pass through a work device corresponding sheave is connected to a lifting wire rope 18 unwound from the main winch 11. By winding the leaving wire rope 31 with the leaving winch 36, the lifting wire rope 18 is wound through the work device corresponding sheave while being unwound from the main winch 11.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a wire rope reeling configuration for a pile driver, which reels a lifting wire rope for lifting and lowering a work device along a leader. [Background technology]

[0002] An example of a pile driver is disclosed in Patent Document 1 listed below. This pile driver has a rotatable upper rotating body on a crawler-equipped lower traveling body, and a leader that is erected during operation is attached to the front of the upper rotating body. A working device such as an auger is slidably attached to the erected leader and is suspended by a lifting wire rope that is fed through a top sheave at the upper end of the leader. The lifting wire rope is then unwound and reeled in by a main hoisting winch, thereby lifting and lowering the auger along the leader.

[0003] As shown in Patent Document 2 below, the lifting wire rope is unwound from the main winch of the upper rotating body and fed to a top sheave block located at the top end of the leader via guide sheaves on the upper rotating body. The top sheave block is provided with multiple sheaves, and the auger lifting sheave block is also provided with multiple sheaves, with the lifting wire rope running between them. The tip of the lifting wire rope is then connected to the top sheave block. For example, the top sheave block and the lifting sheave block each have six sheaves, and the auger is suspended by a 12-strand lifting wire rope. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-023086 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-047576 Summary of the Invention [Problem to be solved by the invention]

[0005] As mentioned above, in pile drivers, the lifting wire rope, which is unwound from the main winch of the upper rotating body, is threaded through each sheave. However, the lifting wire rope used to raise and lower the auger is heavy, with a diameter of, for example, 20 mm or more, so threading it manually requires a great deal of effort. In particular, between the top sheave block and the lifting sheave block, 12 wire ropes must be threaded over six sheaves each, making it very difficult to handle such a stiff, thick, and heavy wire rope over such a short distance.

[0006] Therefore, in order to solve this problem, an object of the present invention is to provide a wire rope routing configuration for a pile driver that reduces the amount of work required. [Means for solving the problem]

[0007] The wire rope winding configuration of the pile driver according to the present invention winds the lifting wire rope wound on the main hoisting winch through a plurality of lifting sheaves of a top sheave block provided at the top of the leader and a plurality of lifting sheaves of a work device sheave block detachable to a work device that moves up and down along the leader. The work device sheave block is attached to the leader stand closest to the top sheave block among a plurality of leader stands arranged in the longitudinal direction that support the fallen leader, and the work device sheave block is attached to the leader stand closest to the top sheave block. A reeving winch with a reeving wire rope, thinner than the lifting wire rope, wound around it is provided closer to the main winch than the lock, and the reeving wire rope, which is unwound from the reeving winch and wound around so as to pass through the work device corresponding sheave, is connected to the lifting wire rope unwound from the main winch, and by winding up the reeving wire rope with the reeving winch, the lifting wire rope is unwound from the main winch and wound around through the work device corresponding sheave. [Effects of the Invention]

[0008] According to the above configuration, when winding the lifting wire rope, the worker can handle a reeving wire rope, which is thinner than the lifting wire rope, thereby reducing the workload.After winding the wire rope, the worker can connect the reeving wire rope to the lifting wire rope, wind it up with the reeving winch, and unwind it with the main winch, thereby completing the winding of the lifting wire rope through the work device compatible sheave. [Brief explanation of the drawings]

[0009] [Figure 1] This is an image diagram showing the wiring of the wire rope used in the pile driver. [Figure 2] FIG. 1 is a side view of a pile driver showing the wire rope winding configuration of the first embodiment. [Figure 3] FIG. 10 is a side view of a pile driver showing the wire rope winding configuration of the second embodiment. [Figure 4] FIG. 10 is a side view of a pile driver showing the wire rope winding configuration of the third embodiment. [Figure 5] FIG. 10 is a side view of a pile driver showing the wire rope winding configuration of the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] One embodiment of the wire rope reeling configuration for a pile driver according to the present invention will be described below with reference to the drawings. FIG. 1 is an image diagram showing the reeling of the wire rope used in the pile driver. FIG. 2 is a side view of the pile driver showing the wire rope reeling configuration of the first embodiment. The overall structure of the pile driver 1, similar to the conventional example, is such that a rotatable upper revolving body 7 is mounted on a lower traveling body 6 equipped with crawlers 8, and a raisable leader 5 is connected to the front of the upper revolving body 7. The upper revolving body 7 is equipped with multiple winches around which wire ropes for various applications are wound.

[0011] Specifically, they are a main winch 11, an auxiliary winch 12, a third winch 13, a leader hoist winch 14, and a fourth winch 15. These multiple winches (11-15) are mounted side by side at the rear of the upper rotating body 7 so that the rotation axes of each drum are coaxial or parallel. The pile driver 1 is equipped with working devices such as an auger 81 and a hammer 82 attached to the front side of the erected leader 5, allowing work to be performed by lifting and lowering along the leader 5. The working devices are connected to the wire rope that is unwound from a specified winch, and lifting and lowering are performed by unwinding and rewinding the wire rope.

[0012] Of the winches, the main winch 11 is used to raise and lower the auger 81, and the auxiliary winch 12 is used to lift the pile 83, etc. The third winch 13 is used to lift the hammer 82, etc., at the side of the leader 5, and the leader hoisting winch 14 is used to raise the leader 5 when it is in a collapsed state as shown in Figure 2. In this embodiment, the fourth winch 15 is a spare winch, and can be used as part of the wire rope reeling configuration, as will be described later.

[0013] The wire rope reeling configuration of this embodiment is intended for the reeling of the lifting wire rope 18 wound around the main hoisting winch 11 that raises and lowers a work device such as an auger 81. As described above, the lifting wire rope 18 has a diameter of 20 mm or more in order to suspend a heavy work device such as an auger 81. The work of reeling such a lifting wire rope 18 as shown in Figure 1 places a heavy burden on the worker, requires a large number of workers, and lengthens the work time.

[0014] During the reeling operation, the lifting wire rope 18 wound around the main hoisting winch 11 passes through a lower guide sheave 21 provided on the front bracket, and is fed from an intermediate guide sheave 22 provided on the back side of the leader 5 to a top sheave block 29 (see Figure 2) provided at the top end of the leader 5. A rear sheave 23 and a front suspension sheave 25 are provided in the top sheave block 29, and the lifting wire rope 18 fed to the top end of the leader 5 is fed from the rear sheave 23 to the suspension sheave 25.

[0015] The lifting sheave 25 has six sheaves supported coaxially, and six lifting sheaves 27 are also supported coaxially on the working device side, such as the auger 81. The lifting wire rope 18 is then routed six times back and forth between the lifting sheave 25 of the top sheave block 29 and the lifting sheave 27 of the auger 81, and then its tip is connected to the load cell 34 of the top sheave block 29. The work of routing the lifting wire rope 18 around multiple working device sheaves, such as the lower guide sheave 21, is extremely hard work, especially since the heavy and stiff lifting wire rope 18 must be routed six times back and forth between the lifting sheave 25 and the lifting sheave 27. Therefore, this embodiment proposes a wire rope routing configuration that reduces this burden.

[0016] The lifting wire rope 18 is reeled in with the leader 5 in a laid-down position as shown in FIG. 2. The pile driver 1 is large, and the laid-down leader 5 is supported by three leader stands 33 (33A, 33B, 33C) arranged in the longitudinal direction. In the wire rope reeling configuration of this embodiment, the work equipment sheave block 32 is attached to the leader stand 33A, which is the closest to the top sheave block 29 among the three leader stands 33. The work equipment sheave block 32 of the work equipment such as the auger 81 is detachable by pinning, and is detached when the lifting wire rope 18 is reeled in. The leader stand 33A is formed with a bracket that can be pinned to detach the work equipment sheave block 32.

[0017] In addition, in the wire rope reeling configuration of this embodiment, a reeving winch 36 is attached to the leader stand 33C, which is the closest of the three leader stands 33 to the lower traveling body 6. A reeving wire rope 31 having a diameter of approximately 6 mm is wound around the reeving winch 36. This reeving wire rope 31 is thinner and lighter than the lifting wire rope 18, making it easier for workers to handle. In addition, it has sufficient strength to withstand the payout of the lifting wire rope 18, which will be described later. The reeving winch 36 is connected to a battery mounted on the pile driver 1 by a power cable 37, and is used for driving operation.

[0018] Next, a load cell 34 is attached to the top sheave block 29, and a reeving sheave 35 is temporarily attached to its wire socket in place of the lifting wire rope 18. In the pile driver 1, after the lifting wire rope 18 has been reeled in, its end is connected to the load cell 34, and the pull-out load applied to the leader 5 is detected. In other words, the value detected by the load cell 34 is displayed on a load meter in the driver's seat, and the pile driver is operated so as not to apply an overload to the leader 5. In the reeling work of this embodiment, the load cell 34 is used to attach the reeving sheave 35.

[0019] Next, a method for reeving the lifting wire rope 10 of this embodiment will be described. In conventional reeving work, the heavy lifting wire rope 18 unwound from the main hoisting winch 11 is passed directly through the work device sheave. However, in this embodiment, the worker reeves a reeving wire rope, which is easier to handle. That is, the reeving wire rope 31 is reeved before the lifting wire rope 18 is reeved.

[0020] The reeving wire rope 31 is wound around by being unwound from the reeving winch 36 in the opposite direction to the lifting wire rope 18. Therefore, the reeving wire rope 31 is sent from the reeving winch 36 toward the top of the leader 5 through the gap between the leader stands 33A and 33B, and is wound around the reeving sheave 35. Then, the reeving wire rope 31 is wound around six round trips between the lifting sheave 27 at the position of the leader stand 33A and the suspension sheave 25 of the top sheave block 29.

[0021] Furthermore, the reeving wire rope 31 is stretched along the back surface of the leader 5 via the rear sheave 23 of the top sheave block 29, and is connected to the lifting wire rope 18 that has been unwound from the main hoisting winch 11 by a connector 38. This completes preparations for reeling the lifting wire rope 18. Thereafter, the reeving wire rope 31 is wound onto the reeving winch 36, and the lifting wire rope 18 is fed as if pulled by it.

[0022] The connected lifting wire rope 18 and reeving wire rope 31 are unwound from the main hoisting winch 11 or wound onto the reeving winch 36 while maintaining a constant tension. As a result, the lifting wire rope 18, pulled by the reeving wire rope 31, is reeled in and around the work device sheave without coming off the suspension sheave 25 and the lifting sheave 27, which make six round trips. After the lifting wire rope 18 is reeled in and around the last lifting sheave 27, it is detached from the reeving wire rope 31. Then, the reeving sheave 35 is removed from the load cell 34 of the top sheave block 29, and the tip of the lifting wire rope 18 is connected to the wire socket installed in its place, completing the reeving process.

[0023] Next, Figure 3 is a side view of a pile driver showing the wire rope reeling configuration of a second embodiment. This pile driver 2 is the same as the pile driver 1 of the first embodiment, but a reeving winch 36 is attached to the lower traveling body 6. The lower traveling body 6 has crawlers 8 rotatably attached to the left and right sides of the frame, and the reeving winch 36 is mounted on the front part of the frame, centered between them. A sheave block 32 for the work device is fixed to the leader stand 33A that supports the fallen leader 5 in the same way. In the following explanation, the same components as those in the first embodiment will be described using the same reference numerals.

[0024] The wire rope reeling configuration of this embodiment is the same as that of the first embodiment, in which the reeving wire rope 31 unwound from the reeving winch 36 is reeled in. The reeling is performed in the opposite direction to the lifting wire rope 18, and the reeving wire rope 31 is fed toward the top of the leader 5 through the gap in the leader stand 33. The reeving wire rope 31 is then reeled back and forth six times between the lifting sheave 27 located at the leader stand 33A and the suspension sheave 25 of the top sheave block 29 via the reeving sheave 35.

[0025] Furthermore, the reeving wire rope 31 is stretched along the back surface of the leader 5 via the rear sheave 23 of the top sheave block 29, and is connected by a connector 38 to the lifting wire rope 18 being unwound from the main hoisting winch 11. Thereafter, the connected lifting wire rope 18 and reeving wire rope 31 are unwound from the main hoisting winch 11 while maintaining a constant tension, or are wound onto the reeving winch 36. The lifting wire rope 18 is then disconnected from the reeving wire rope 31 and connected to the load cell 34 of the top sheave block 29, completing the reeving process.

[0026] Next, Figure 4 is a side view of a pile driver showing a wire rope reeling configuration of a third embodiment. This pile driver 3 is the same as the pile driver 1 of the first embodiment, but has a work winch 41 built into the side of the leader 5 so that a predetermined work device can be raised and lowered. In the wire rope reeling configuration of this embodiment, the work winch 41 is used as a reeving winch, and the reeving wire rope 31 is wound around it. In addition, a reeving sheave 42 is attached to the leader stand 33C so as to adjust the feed position of the reeving wire rope 31 fed out from the side of the leader 5. A work device sheave block 32 is fixed to the leader stand 33A.

[0027] Therefore, in the wire rope reeling configuration of this embodiment, the reeling wire rope 31 unwound from the work winch 41 is sent toward the top of the leader 5 through the reeling sheave 42. Then, via the reeling sheave 35, the wire rope is reeled back and forth six times between the lifting sheave 27 located at the leader stand 33A and the hanging sheave 25 of the top sheave block 29.

[0028] Furthermore, the reeving wire rope 31 is stretched along the back surface of the leader 5 via the rear sheave 23 of the top sheave block 29, and is connected by a connector 38 to the lifting wire rope 18 being unwound from the main hoisting winch 11. Thereafter, the connected lifting wire rope 18 and reeving wire rope 31 are unwound from the main hoisting winch 11 while maintaining a constant tension, or are wound onto the work winch 41. The lifting wire rope 18 is then disconnected from the reeving wire rope 31 and connected to the load cell 34 of the top sheave block 29, completing the reeving process.

[0029] Next, FIG. 5 is a side view of a pile driver showing the wire rope reeling configuration of a fourth embodiment. This pile driver 4 is the same as the pile driver 1 of the first embodiment, but in this case, a spare fourth winch 15 is used as a reeving winch, and a reeving wire rope 31 is wound around it. The fourth winch 15 is located at the rear of the upper rotating body 7. Therefore, the reeving wire rope 31 is fed forward through a guide sheave 91 provided at the top of the gantry 9. After passing through the guide sheave 91, the reeving wire rope 31 needs to be fed below the fallen leader 5. For this reason, the pile driver 4 has a reeving sheave 45 attached to a bracket provided at the front of the upper rotating body 7. A sheave block 32 for the work equipment is fixed to a leader stand 33A that supports the leader 5.

[0030] Therefore, in the wire rope reeling configuration of this embodiment, the reeling wire rope 31 unwound from the fourth winch 15 is sent from the guide sheave 91 through the reeling sheave 45 toward the top of the leader 5. Then, via the reeling sheave 35, the wire rope is reeled back and forth six times between the lifting sheave 27 located at the leader stand 33A and the hanging sheave 25 of the top sheave block 29.

[0031] Furthermore, the reeving wire rope 31 is stretched along the back surface of the leader 5 via the rear sheave 23 of the top sheave block 29, and is connected by a connector 38 to the lifting wire rope 18 being unwound from the main hoisting winch 11. Thereafter, the connected lifting wire rope 18 and reeving wire rope 31 are unwound from the main hoisting winch 11 while maintaining a constant tension, or are wound onto the fourth winch 15. The lifting wire rope 18 is then disconnected from the reeving wire rope 31 and connected to the load cell 34 of the top sheave block 29, completing the reeving process.

[0032] According to the wire rope reeling configuration of the above embodiment, the worker handles a reeving wire rope 31 with a diameter of about 6 mm, which significantly reduces the burden on the worker compared to the work of directly reeling the conventional thick lifting wire rope 18. After reeling the reeving wire rope 31, which is thinner than the conventional lifting wire rope 18, the reeving wire rope 31 is connected to the lifting wire rope 18, and the reeving winch 36 (the same applies to the work winch 41 and the fourth winch 15) is wound up and the main hoisting winch 11 is unwound, completing the work of reeling the lifting wire rope through the work device compatible sheaves (21, 22, 23, 25, 27).

[0033] Although one embodiment of the present invention has been described above, the present invention is not limited to this and various modifications are possible without departing from the spirit of the present invention. For example, the position of the reeving winch 36 shown in the above embodiment can be changed as desired, and other winches such as the work winch 41 and the fourth winch 15 used as the reeving winch may be used instead. Furthermore, although the embodiment has been described with three reader stands, the number may be two, or four or more. In addition, although the wire rope to be wound around in the above embodiment is the wire rope of the main winch, it may be the wire rope of another winch. [Explanation of symbols]

[0034] 1, 2, 3, 4... Pile driver 5... Leader 6... Lower running body 7... Upper rotating body 8... Crawler 11... Main winch 15... Fourth winch 18... Lifting wire rope 25... Lifting sheave 27... Lifting sheave 29... Top sheave block 31... Reeving wire rope 32... Sheave block for work equipment 33 (33A, 33B, 33C)... Leader stand 34... Load cell 36... Reeving winch 81... Auger

Claims

1. A wire rope winding configuration for a pile driver in which the lifting wire rope wound around the main winch is wound through a plurality of lifting sheaves of a top sheave block provided at the top of the leader and a plurality of lifting sheaves of a work device sheave block detachable from the work device that moves up and down along the leader, Among a plurality of leader stands arranged in the longitudinal direction to support the laid down leader, the sheave block for the working device is attached to the leader stand closest to the top sheave block, a reeving winch on which a reeving wire rope thinner than the lifting wire rope is wound is provided closer to the main hoisting winch than the working device sheave block; The reeving wire rope is unwound from the reeving winch and wound around the work device corresponding sheave, and is connected to the lifting wire rope unwound from the main hoisting winch, A wire rope winding configuration for a pile driver in which the reeving wire rope is wound up by the reeving winch, and the lifting wire rope is wound through the work device corresponding sheave while being unwound from the main winch.

2. The wire rope winding configuration of a pile driver as described in claim 1, wherein the reeving winch is attached to the leader stand at a position closer to the main hoisting winch than the leader stand to which the work device sheave block is attached.

3. 2. The wire rope reeling structure for a pile driver according to claim 1, wherein the reeving winch is attached to an upper rotating body of the pile driver.

4. 2. The wire rope winding configuration of a pile driver as described in claim 1, wherein the reeving winch is a work winch attached to the side of the leader, and a reeving sheave for feeding the reeving wire rope is attached to the leader stand.

5. 2. The wire rope winding configuration of a pile driver as described in claim 1, wherein the reeving winch is a spare winch provided on the upper rotating body of the pile driver, and has a gantry guide sheave provided on the upper rotating body and a reeving sheave provided on the upper rotating body for feeding the reeving wire rope.

6. A wire rope winding configuration for a pile driver described in any one of claims 1 to 5, wherein a reeving wire rope is wound around the work device corresponding sheave via a reeving sheave connected to a load cell attached to the top sheave block.

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