JPH08269960A - Elevation device for working platform for pile constructing machine - Google Patents

Abstract

PURPOSE: To improve the easiness in executing works or performing operations in a narrow place. CONSTITUTION: An auger driving mechanism is installed in engagement in such a way as elevating and sinking along the first guide rails 8, 10 furnished on a leader 2 installed in upright attitude. The arrangement further includes a working platform 70 equipped with a moving table 42 supported movably along the second guide rails 36, 38 furnished on the leader 2 parallel with the first guide rails 8, 10, an arm 60 supported rotatably on the moving table 42, and a table 64 which is supported on the arm 60 rotatably. Wires 48, 50 are fastened to the moving table 42 and hung down by a winch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for a pile construction machine for raising and lowering a workbench used for auxiliary work when constructing a pile by a construction mechanism such as an auger drive mechanism and a hammer mechanism, and for maintenance and inspection work of the construction mechanism. The present invention relates to a workbench elevator.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 57-26926, a workbench is vertically mounted on a guide shaft having a hexagonal cross section provided along a leader, and the workbench is suspended by a winch. A device having a mechanism for rotating a guide shaft is known.

As disclosed in Japanese Patent Laid-Open No. 5-331855, a workbench is supported so that it can be raised and lowered along a guide frame provided on a leader, and a wire having one end fastened to the workbench is wound around a sheave. After that, wind it up on the drum on the car body,
When raising and lowering the workbench and tilting the leader,
It is known that the floor of the workbench can be tilted.

[0004]

However, in such a conventional one, an auxiliary work for connecting a construction mechanism such as an auger drive mechanism or a hammer mechanism to an auger drill or a pile,
When the workbench is enlarged to facilitate the maintenance and inspection work of the construction mechanism, the workbench is rotated around the guide shaft as described in Japanese Utility Model Publication No. 57-26926. It requires a large space. Therefore, if the pile construction site is small, the work table hits the wall of the adjacent building, and there is a limit to making the work table large. Further, from the viewpoint of workability, it is preferable that the workbench be formed close to the construction mechanism, but as described in JP-A-5-331855, when the workbench is not swivel, the construction mechanism is lifted or lowered. At that time, the construction mechanism interferes with the workbench, and the workbench has to be removed every time the construction mechanism is moved up and down.
From this point as well, there is a problem that there is a limit to how large the workbench can be.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a work platform elevating / lowering device for a pile construction machine, which aims to solve the above-mentioned problems and to improve the workability and the workability in a narrow place.

[0006]

In order to achieve such an object, the present invention has the following constitution as means for solving the problem. That is, in a pile construction machine that raises and lowers a construction mechanism along a first guide rail provided on a standing leader, moves along a second guide rail provided on the leader in parallel with the first guide rail. A worktable having a movable table supported movably, an arm member rotatably supported by the movable table, and a platform rotatably supported by the arm member, and a drive for raising and lowering the work table This is the structure of a work platform lifting device for a pile construction machine, which is equipped with a mechanism.

The drive mechanism may be a winch, and a wire from the winch may be fastened to the movable table to suspend the work table. Alternatively, the arm member is rotatably supported on the movable base about an axis parallel to the second guide rail, and the mount base is mounted on the arm member about an axis parallel to the second guide rail. It may be rotatably supported.

Further, the arm member is rotatably supported by the movable base about an axis orthogonal to the second guide rail, and the mount base is mounted on the arm member by the second arm.
It may be configured to include a drive mechanism that is rotatably supported around an axis orthogonal to the guide rail and that moves the platform while keeping the platform horizontal.

The driving mechanism includes a first sprocket fixed to a first fixed shaft that is attached to the moving base orthogonally to the second guide rail and rotatably supports the arm member, and the first mounting sprocket to the mounting base. 2nd which is attached orthogonally to 2 guide rails and is rotatably inserted in said arm member
A configuration may be adopted in which a second sprocket fixed to a fixed shaft and a chain stretched between the two sprockets are provided, and a rotation shaft of a motor fixed to the arm member is connected to the second fixed shaft.

[0010]

In the work platform elevating / lowering device for pile construction machine having the above-described structure, the work platform is moved up and down along the second guide rail by the drive mechanism, and the boarding platform is moved to approach the construction system.
Further, in the case where the wire from the winch is fastened to the moving table, the winch raises and lowers the work table via the moving table. Furthermore, in the case where the arm member and the platform are rotatably supported around an axis parallel to the second guide rail, the arm member and the platform are rotated around an axis parallel to the second guide rail, Move the boarding platform to approach the construction mechanism.

Alternatively, in the case where the arm member and the platform are rotatably supported about an axis orthogonal to the second guide rail, the drive mechanism moves the platform while keeping the platform horizontal to approach the construction mechanism. In the case where the drive mechanism has a chain stretched between sprockets, rotation of the motor moves the boarding platform while keeping it horizontal to approach the construction mechanism.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, reference numeral 1 is a self-propelled pile construction machine main body using a crawler, and a leader 2 is a pair of stays 4
The catching hawk 6 supports the leader 2 so that the leader 2 can be swung up and down, and the leader 2 can be swung around its axis.

Two long first guide rails 8 and 10 having a circular cross section are laid along the longitudinal direction of the leader 2 (see FIG. 3). The first guide rails 8 and 10 are provided on the first guide rails 8 and 10. The auger drive mechanism 12 is slidably engaged with the first guide rails 8 and 10 via a plurality of guide gibs 14. The auger drive mechanism 12 includes a rotary shaft 7 described later.
It is configured to rotationally drive the auger drill 16 attached to the No. 2.

Further, the pushing mechanism 18 connected to the auger drive mechanism 12 is slidably engaged with the first guide rails 8 and 10 through the plurality of guide gibs 20 along the first guide rails 8 and 10. Has been done. The pushing mechanism 18 is a pile 71.
It is configured such that an axial pushing force is applied to the.

The auger drive mechanism 12 includes a hanging sheave 22.
Is rotatably supported, one end of the wire 24 is fastened to the upper end of the leader 2, and a plurality of hanging sheaves 22 and a plurality of sheaves 26 rotatably supported on the upper end of the leader 2. After being wrapped around, the sheave 28 is rotatably supported on the upper end of the leader 2.

Further, the wire 24 is wound around a rotary drum 34 of a main winch 32 provided in the pile construction machine main body 1 via a sheave 30 rotatably supported in the middle of the leader 2, and the main winch 32 is provided. Driven by auger drive mechanism 1
2. The pushing mechanism 18 can be moved up and down.

Further, as shown in FIG.
Second guide rails 36 and 38 having a circular cross section are laid parallel to the first guide rails 8 and 10. The second guide rails 36 and 38 are provided with a movable table 42 secondly via a plurality of guide gibs 40. It is slidably engaged along the guide rails 36 and 38.

This moving table 42 has two wires 48,
One end of 50 is fastened, and the wires 48 and 50 are rotatably supported on the upper end of the reader 2 by a pair of sheaves 5.
2, 54, and is wound around a drum 58 of a workbench winch 56 attached to the lower end side surface of the leader 2.

As shown in FIG. 4, an arm member 60 is supported on the movable table 42 by a support shaft 62 parallel to the second guide rails 36 and 38 so as to be rotatable around the support shaft 62. The support shaft 62 is the auger drive mechanism 1 of the movable table 42.
It is arranged at the end on the second side. In addition, at the tip of the arm member 60, the boarding platform 64 is also provided with the second guide rails 36,
A support shaft 66 parallel to the shaft 38 rotatably supports the support shaft 66.

The boarding platform 64 includes a flat floor 68 on which an operator can board and a fence member 69 that surrounds the four floors of the floor 68, and has a floor area large enough for at least one operator to board. In the present embodiment, the arm member 60 is formed in a substantially [L] shape, and the tip end of the arm member 60 is supported by the support shaft 66 at the end of the platform 64 as shown by the solid line in FIG. There is.

When rotated around the support shaft 66, the platform 64 is held inside the arm member 60, and the platform 64 and the arm member 60 are moved to a compactly folded storage position. . Moreover, when in the storage position, the auger drive mechanism 12 and the pushing mechanism 1
The workbench 70 does not interfere with the auger drive mechanism 12 and the pushing mechanism 18 even when the work piece 8 is moved up and down. When rotated in the opposite direction, the boarding platform 64 is configured to largely project from the reader 2.

When the arm member 60 is rotated around the support shaft 62, as shown in FIG. 5, the arm member 60 wraps around the side surfaces of the auger drive mechanism 12 and the pushing mechanism 18, so that the platform 64 is augered. The drive mechanism 12 and the push-in mechanism 18 are configured so that they can be moved to a work position substantially on the front side.

In this embodiment, the workbench 70 is composed of the guide gib 40, the moving table 42, the arm member 60, and the board 64.
Is configured. A motor may be attached to each of the support shafts 62 and 66 so that the arm member 60 and the platform 64 can be rotated around each of the support shafts 62 and 66 by the rotation of the motor. Further, the arm member 60 is composed of two arm members in which the first arm member and the second arm member are rotatably connected by another supporting shaft parallel to the supporting shafts 62 and 66. Can also be implemented. The shape of the arm member 60 is substantially “L”.
The shape is not limited to the letter shape, and the outer shapes of the auger drive mechanism 12 and the pushing mechanism 18 as the construction mechanism and the moving table 4 are not limited thereto.
The shape may be such that the loading platform 64 can be moved between the compactly folded storage position and the working position close to the auger drive mechanism 12 and the push-in mechanism 18 in accordance with 2 or the like. The push-in mechanism 18 is used in the case of the underground digging pile construction method, and may be provided as necessary.

Next, the operation of the work platform elevating / lowering device for the pile construction machine according to the present embodiment described above will be described by taking an example of construction by the hollow digging pile construction method. While rotating the auger drill 16 inserted into the hollow inside of the pile 71 by the auger drive mechanism 12,
A pushing force is applied in the axial direction by the pushing mechanism 18 to build the pile 71. Then, when it is installed to a predetermined depth, the auger drive mechanism 12 and the push-in mechanism 18 drive the main winch 32 to raise it along the first guide rails 8 and 10. Next, a new pile 71 is added and the auger drills 16 are connected to each other.

Then, the reader 2 is lowered to the lower end,
An operator rides on the platform 64 at the storage position, drives the platform winch 56, and raises the platform 70 near the tip of the auger drill 16 along the second guide rails 36 and 38. At this time, another worker on the ground may operate the workbench winch 56 according to the instruction of the worker on the workbench 70, or the worker on the workbench 70 may operate the workbench 70. It may be operated remotely on the above.

Next, the operator on the workbench 70 instructs another operator on the ground side to operate the main winch 32 and lower the auger drive mechanism 12. At this time, the worker on the workbench 70 first rotates the boarding platform 64 from the storage position around the support shaft 66, and projects the boarding platform 64 to the outside as shown by the chain double-dashed line in FIG. Then, the arm member 60 is rotated around the support shaft 62, and as shown by the solid line in FIG.
The platform 64 is moved to wrap around the front side of the auger drive mechanism 12, and is moved to a work position close to the auger drive mechanism 12.

For example, in connection work, the auger drive mechanism 1
The auger drill 16 is inserted in the hexagonal hole formed in the rotary shaft 72 of
Since the hexagonal shaft at the tip of is inserted, the rotary shaft 72 and the auger drill 16 must be connected in phase with each other. At that time, the operator instructs the operator on the ground to perform an inching operation of the rotary shaft 72, and moves the auger drill 16 or the like so that the phases are aligned with each other. Auger drill 1
After inserting 6, the operator on the workbench 70 moves the rotary shaft 72
The connecting pin 76 is inserted into the pin insertion hole 74 by hammering or the like.

After the connection work is completed, the arm member 60 is rotated around the support shaft 62 to move the platform 64 away from the auger drive mechanism 12 and drive the auger as shown by the chain double-dashed line in FIG. The mechanism 12 is moved to the side surface side. Furthermore,
As shown by the solid line in FIG. 4, the platform 6 is mounted around the support shaft 66.
4 is rotated to move the boarding platform 64 to the storage position inside the arm member 60 to store the workbench 70, and then the workbench winch 56 is driven to lower the workbench 70.

Then, as described above, the auger drive mechanism 1
While driving 2 to rotate the auger drill 16, pile 7
Build 1. Even if the auger drive mechanism 12 is lowered, the auger drive mechanism 12 does not interfere with the workbench 70,
Even with the worktable 70 supported on the second guide rails 36 and 38, the auger drive mechanism 12 can be lowered to a predetermined position without any trouble.

In this way, the operator moves the platform 64 to approach the auger drive mechanism 12, connects the rotary shaft 72 of the auger drive mechanism 12 and the auger drill 16, and the auger drive mechanism 12 and the pushing mechanism. It is possible to easily and efficiently perform the maintenance and inspection work of 18. Moreover, boarding platform 6
When 4 is moved and stored, even if the auger drive mechanism 12 and the pushing mechanism 18 are moved up and down, there is no interference and no hindrance to the pile construction work.

The board 64 may be a small one that can be boarded by a single person, and can rotate around the support shafts 62 and 66 to move in a wide range together with the board 64. Moreover, when it is moved to the storage position, it is stored compactly and construction in a narrow space becomes possible. Further, since the wires 48 and 50 are fastened to the moving table 42, the positions of the wires 48 and 50 do not move even if the boarding table 64 is moved.
8 and 50 do not sway and entangle or rub against other members or wires.

Next, a workbench of the second embodiment different from the workbench 70 described above will be described with reference to FIGS. 6 and 7.
The same members as those in the above-described embodiment are designated by the same reference numerals and detailed description thereof will be omitted. A support member 80 is erected on the movable table 42, and a second member is provided at the tip of the support member 80.
A first fixed shaft 82 orthogonal to the guide rails 36 and 38 is fixed. An arm member 84 is rotatably supported on the first fixed shaft 82, and the first sprocket 8 is also supported.
6 is fixed.

A second fixed shaft 88, which is parallel to the first fixed shaft 82, is rotatably inserted into the arm member 84.
The second sprocket 90 is fixed to the fixed shaft 88, and the connecting member 92 is attached to the fixed shaft 88. Connection member 9
A boarding base 94 is rotatably supported around the support shaft 96 by a support shaft 96 parallel to the second guide rails 36 and 38. The connection member 92 and the boarding base 94 can be integrated without the support shaft 96, but the support shaft 96 improves the accessibility described later.

The first sprocket 86 and the second sprocket 90 have the same number of teeth, and both sprockets 86, 90 have the same number of teeth.
A chain 98 is stretched between them. The frame of the motor 100 with a brake is fixed to the arm member 84, and the rotation shaft of the motor 100 is the second fixed shaft 88.
It is connected to the. Incidentally, in the second embodiment, the guide give 4
0, movable table 42, support member 80, first fixed shaft 82, first
Sprocket 86, arm member 84, second fixed shaft 88,
A workbench 102 is constituted by the second sprocket 90, the chain 98, and the motor 100.

In the second embodiment, first, as shown by the chain double-dashed line in FIG. 7, the platform 94 is stored on the side of the leader 2 by the pile construction machine body 1 side away from the auger drive mechanism 12. It is moved to the position and the storage position is selected at a position away from the auger drive mechanism 12 and the pushing mechanism 18, and even if the auger drive mechanism 12 and the pushing mechanism 18 are moved up and down, Do not interfere. The motor 100 is driven from this retracted position to move the arm member 84 to about 18
The boarding base 94 is moved to the boarding position rotated by 0 degrees.

When the second sprocket 90 is rotated once,
Since the arm member 84 has a relationship of making one rotation around the first fixed shaft 82, when the motor 100 is driven, the platform 94 is
Moves while keeping horizontal. By moving to the boarding position and lowering the board 94, it becomes easier for the worker to board. After that, the worker boards the board 94, and as in the first embodiment, the work table winch 56 is removed. By driving, the workbench 102 is raised along the second guide rails 36 and 38 to the vicinity of the tip of the auger drill 16.

Then, the motor 100 is driven to drive the boarding platform 9
4 is pulled up to the working position in which the auger drive mechanism 12 is approached, and as shown by the solid line in FIG.
The auger drive mechanism 1 is rotated by rotating the board 94 around the
Get closer to 2. As a result, the worker can approach the auger drive mechanism 12 and the pushing mechanism 18 and easily and efficiently perform the connecting work and the maintenance / inspection work. Moreover, even if the platform 94 is large enough for one person to ride, sufficient accessibility is obtained, and since the platform 94 rotates about the first fixed shaft 82, the required rotation area on the horizontal plane is small, Can be rotated even in a narrow space.

After the work is finished, the winch 5 for the workbench is used.
The workbench 102 is lowered by 6 to drive the motor 10 to move the boarding platform 94 to the boarding position to lower the worker, and then the motor 10 is driven to move the boarding platform 94 to the storage position. Then, the auger driving mechanism 12 is driven to rotate the auger drill 16, and the main winch 32 lowers the auger driving mechanism 12 to build the pile 71. At that time, since the boarding base 94 is in the storage position, it does not interfere with the auger drive mechanism 12 and the pushing mechanism 18.

Next, the workbench of the third embodiment will be described with reference to FIG. In the third embodiment, unlike the second embodiment, two ends of two link members 110 and 112 of the same length are rotatably connected to the moving base 42 and the connecting member 92, respectively, so-called parallel links. The mechanism is formed. The link members 110, 11 by a motor or the like (not shown)
2 is configured to be able to swing. As a result, the boarding base 94 can be moved to the work position and the storage position as described above. However, in this case, the movement angle is limited to approximately 90 degrees or less.

The drive mechanism is a work table winch 56.
Not limited to this, the rack 114 is laid on the leader 2 along the second guide rails 36 and 38, and the pinion gears 116 and 118 attached to the rotation shaft of the motor attached to the moving table 42.
It is also possible to implement a mechanism in which the rack is engaged with the rack 114 and the workbench 60 is raised and lowered by the rotation of the motor.

The present invention is not limited to the embodiments as described above, and can be carried out in various modes without departing from the gist of the present invention.

[0042]

As described above in detail, the workbench lifting device for pile construction machines according to the present invention moves by rotating the arm member and the boarding platform, so that even if the boarding platform is small, sufficient accessibility is achieved. In addition to being obtained, it is possible to perform construction in a narrow place. Further, when the wire is fastened to the moving table, the wire does not move even if the boarding table is moved, so that the wires can be prevented from being entangled or rubbed with each other.

Further, in the case of being rotatably supported around an axis parallel to the second guide rail, the platform can be moved in a wide range in the horizontal plane, and the platform can be moved around the axis perpendicular to the second guide rail. The rotatably supported one is particularly suitable for construction in a narrow place because the rotation area on the horizontal plane required for movement may be small.

[Brief description of drawings]

FIG. 1 is a front view of a pile construction machine equipped with a work platform lifting device for a pile construction machine as an embodiment of the present invention.

FIG. 2 is a side view of a pile construction machine equipped with the work platform lifting device for a pile construction machine according to the present embodiment.

FIG. 3 is an enlarged perspective view of a workbench of the workbench lifting device for a pile construction machine according to the present embodiment.

FIG. 4 is a plan view when the workbench of the workbench lifting device for the pile construction machine according to the present embodiment is in the retracted position.

FIG. 5 is a plan view when the workbench of the workbench lifting device for the pile construction machine according to the present embodiment is in the work position.

FIG. 6 is a plan view of a workbench of a workbench lifting device for a pile construction machine according to a second embodiment.

FIG. 7 is a side view of a workbench of the workbench lifting device for a pile construction machine according to the second embodiment.

FIG. 8 is a side view of a workbench of a workbench lifting device for a pile construction machine according to a third embodiment.

[Explanation of symbols]

 1 ... Pile construction machine main body 2 ... Leader 8, 10 ... First guide rail 12 ... Auger drive mechanism 16 ... Auger drill 36, 38 ... Second guide rail 48, 50 ... Wire 56 ... Workbench winch 62, 66 ... Support Shaft 60, 84 ... Arm member 64 ... Board 70, 102 ... Work table 71 ... Pile 82 ... First fixed shaft 86 ... First sprocket 88 ... Second fixed shaft 90 ... Second sprocket 94 ... Board 96 ... Support shaft

Claims (5)

[Claims] 1. A pile construction machine for elevating and lowering a construction mechanism along a first guide rail provided on an upright leader, comprising: a second guide rail provided on the leader in parallel with the first guide rail. A work table having a movable table movably supported along the movable table, an arm member rotatably supported by the movable table, and a mounting table rotatably supported by the arm member is provided, and the work table is A workbench lifting device for a pile construction machine, which is equipped with a drive mechanism for lifting and lowering. 2. The workbench lifting device for a pile construction machine according to claim 1, wherein the drive mechanism is a winch, and a wire from the winch is fastened to the moving base to suspend the workbench. . 3. The arm member is provided on the moving base with the second arm.
The pedestal is rotatably supported around an axis parallel to the guide rail, and the platform is rotatably supported by the arm member around an axis parallel to the second guide rail. The workbench lifting device for a pile construction machine according to claim 1 or 2. 4. The arm member is provided on the moving table with the second member.
The platform is rotatably supported around an axis orthogonal to the guide rail, the platform is rotatably supported by the arm member around an axis orthogonal to the second guide rail, and the platform is horizontal. The workbench lifting device for a pile construction machine according to claim 1 or 2, further comprising a drive mechanism that moves the workbench while keeping the work. 5. The drive mechanism includes the second base on the movable base.
A first sprocket mounted orthogonal to a guide rail and fixed to a first fixed shaft that rotatably supports the arm member; and a first sprocket mounted orthogonally to the second guide rail on the platform and rotatable on the arm member A second sprocket fixed to a second fixed shaft inserted into the shaft, and a chain stretched between the two sprockets, and a rotation shaft of a motor fixed to the arm member is connected to the second fixed shaft. The workbench lifting device for a pile construction machine according to claim 4.