JP2954866B2 - Workbench elevating device for pile construction machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an auxiliary work for pile construction by a construction mechanism such as an auger drive mechanism and a hammer mechanism,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workbench elevating device for a pile construction machine that moves up and down a workbench used for maintenance and inspection work of a construction mechanism.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 57-26926, a worktable is mounted on a guide shaft having a hexagonal cross section provided along a reader so as to be able to move up and down, and the worktable is suspended by a winch. There is known a mechanism in which a rotation mechanism for rotating a guide shaft is attached to a lower side surface of a reader. Then, the guide shaft is rotated by the rotation mechanism to improve the accessibility between the construction mechanism that moves up and down along the leader and the work table.

[0003]

However, in such a conventional device, the center of gravity of the worktable is suspended by a wire, and the suspended worktable is rotated together with the guide shaft, so that the winch wire also moves with the worktable. Otherwise, the wires would become entangled, making it difficult to handle the wires. On the other hand, if the center of gravity of the work table does not coincide with the center of suspension of the wires, there is a problem that the work table cannot be raised and lowered smoothly when the work table is raised and lowered.

[0004] It is an object of the present invention to provide a workbench lifting and lowering device for a pile construction machine that can smoothly lift and lower a workbench even when the center of gravity and the suspension center do not coincide.

[0005]

In order to achieve the above object, the present invention takes the following means to solve 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, a guide gib is provided on a second guide rail provided on the leader in parallel with the first guide rail. A worktable provided with a movable platform slidably supported by the movable table and a boarding table pivotally supported on the movable table, and a worktable configured to raise and lower the movable table by a wire fastened to the movable table A work winch for a pile construction machine, wherein a guide roller that receives a rotational moment due to the weight of the work table and contacts the second guide rail is attached to the movable table. That is it.

[0006] The guide roller may be provided below the movable table, or may be provided on one side surface of the movable table. Furthermore, it may be provided on both the lower side and the one side surface of the moving table. Further, the guide gib may be swingably supported around a support shaft parallel to the second guide rail, and the guide roller attached to one side surface of the moving base may be configured to be the second guide rail by a spring urging force. The spring may be biased in a direction away from the two guide rails.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1 and FIG.
Is a body of a self-propelled pile construction machine using a crawler. The leader 2 is supported by a pair of stays 4 and a catching fork 6 so as to be able to be turned upside down, and is supported so that the leader 2 can be turned around its axis. Have been.

[0008] Two first guide rails 8 and 10 having a long section with a circular cross section are laid along the longitudinal direction of the reader 2 (see FIG. 5). The auger drive mechanism 12 is slidably engaged along the first guide rails 8 and 10 via a plurality of guide gibs 14. The auger drive mechanism 12 includes a rotating shaft 7 described later.
2 is configured to rotationally drive the auger drill 16 attached thereto.

A pushing mechanism 18 connected to the auger drive mechanism 12 is slidably engaged with the first guide rails 8, 10 via a plurality of guide gibs 20 along the first guide rails 8, 10. Have been. The pushing mechanism 18 includes a pile 71
To give an axial pushing force to the arm.

The auger drive mechanism 12 includes a suspension sheave 22.
Is rotatably supported, one end of a wire 24 is fastened to the upper end of the reader 2, and a plurality of suspension sheaves 22 and a plurality of sheaves 26 rotatably supported by the upper end of the reader 2 are connected to each other. After that, it is wound around a sheave 28 rotatably supported at the upper end of the reader 2.

Further, the wire 24 is wound around a rotary drum 34 of a main winch 32 provided on 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 Drive mechanism 1 by driving
2. It is configured so that the pushing mechanism 18 can be moved up and down.

As shown in FIG. 5, the reader 2 has
Second guide rails 36 and 38 having a circular cross section are laid in parallel with the first guide rails 8 and 10, and the movable table 42 is connected to the second guide rails 36 and 38 via a plurality of guide gibs 40. It is slidably engaged along the guide rails 36 and 38.

In the present embodiment, the guide give 40 has a structure shown in FIG.
As shown in FIG. 5, a semicircular groove 40a corresponding to the outer shape of the second guide rails 36 and 38 is formed.
The second guide rails 36 and 38 are mounted on the second guide rail, and are configured to slide. The guide give 40 is swingably supported by a movable base 42 around a fulcrum pin 41 parallel to the second guide rails 36 and 38, and is provided with pins 43 inserted into the guide give 40 and the movable base 42. The swing of the guide give 40 can be regulated.

By pulling out the pin 43, the guide give 40 is swung to the position shown by the two-dot chain line in FIG. 8 to separate the second guide rails 36 and 38 from the groove 40a,
Is inserted so that it can be fixed in that state. One ends of wires 48, 50 are fastened to the moving table 42, and the wires 48, 50 are hung over a pair of sheaves 52, 54 rotatably supported on the upper end of the reader 2, and It is wound around the drum 58 of the worktable winch 56 attached to the lower side surface.

As shown in FIGS. 3 to 5, the carriage 42 is supported on the movable platform 42 by a support shaft 66 parallel to the second guide rails 36 and 38 so as to be rotatable around the support shaft 66. I have. The boarding platform 64 includes a flat floor 68 on which an operator can board and a fence member 69 surrounding four floors 68, and it is sufficient if the board has at least a floor area large enough for one operator to board.

When the board 64 is rotated about the support shaft 66, the boarding platform 64 is moved to a storage position a (a position indicated by a solid line in FIG. 5).
The work table 70 and the auger drive mechanism 12 and the push mechanism 18 do not interfere with each other even if the push mechanism 18 is moved up and down.

When the board 64 is rotated by 90 degrees around the support shaft 66 and is in the working position b (the position shown by the two-dot chain line in FIG. 5), the board 64 approaches the rotary shaft 72. ing. In this embodiment, the guide give 40,
The moving table 42 and the boarding table 64 constitute a work table 70. The pushing mechanism 18 is used at the time of the inside digging pile method, and may be provided as needed.

As shown in FIGS. 3 to 5, the center of gravity p of the work table 70 is located away from the second guide rails 36 and 38. In this embodiment, the board 64 is closer to the movable table 42 of the boarding table 64. is there. When the boarding table 64 moves from the storage position a to the work position b, the center of gravity p moves accordingly. The fastening position between the wires 48 and 50 and the moving table 42 is near the moving table 42 between the second guide rails 36 and 38 and the center of gravity p.

A support member 73 is attached to the lower side of the movable table 42. As shown in FIG. 6, the support member 73 is orthogonal to the movable table 42 and has second guide rails 36 and 38.
Sliding holes 74 and 76 with bottoms are formed that open toward. Holder members 78 and 80 are slidably inserted into the sliding holes 74 and 76, and guide rollers 82 and 84 are respectively inserted into the holder members 78 and 80 with pins 86 orthogonal to the second guide rails 36 and 38. , 88 so as to be rotatable.

On the outer periphery of the guide rollers 82 and 84, a second
Grooves 82a, 84 corresponding to the outer shapes of guide rails 36, 38
a, and push bolts 90, 9 screwed into the bottoms of the sliding holes 74, 76 coaxially with the holder members 78, 80.
2 are applied to the rear ends of the holder members 78 and 80. By rotating the push bolts 90 and 92, the holder member 7
8 and 80, and slides the grooves 82 of the guide rollers 82 and 84.
a, 84 a can be brought into contact with the second guide rails 36, 38.

A support member 94 is mounted on one side surface of the movable table 42 opposite to the work position b and at a position higher than the center of gravity p of the work table 70.
Is formed with a bottomed sliding hole 96 that opens toward the second guide rail 38. The sliding hole 96 is formed perpendicular to the second guide rail 38 and also perpendicular to the sliding holes 74 and 76.

A holder member 98 is slidably inserted into the slide hole 96, and a guide roller 100 is rotatably supported by the holder member 98 by a pin 102 orthogonal to the second guide rail 38. . A groove 10 corresponding to the outer shape of the second guide rail 38 is provided on the outer circumference of the guide roller 100.
4 are formed.

The tip of a push bolt 106 screwed into the bottom of the slide hole 96 coaxially with the holder member 98 is
At the back end. The push bolt 106 is rotated to slide the holder member 98 so that the groove 104 of the guide roller 100 can be brought into contact with the second guide rail 38. Further, the guide member 100 is urged by the coil spring 108 interposed between the holder member 98 and the support member 94 in a direction away from the second guide rail 38.

Next, the operation of the above-described working table lifting / lowering device for a pile construction machine of this embodiment will be described. Auger drive mechanism 1
2. Auger drill 1 inserted into the hollow inside of pile 71
While rotating 6, the pushing mechanism 18 applies a pressing force in the axial direction, and the pile 71 is built. Then, when erected at a predetermined depth, the auger drive mechanism 12 and the pushing mechanism 18 are driven along the first guide rails 8 and 10 by driving the main winch 32. Next, a new pile 71 is added and the auger drills 16 are connected.

Then, it is lowered to the lower end of the reader 2,
An operator gets on the boarding table 64 at the storage position a and drives the worktable winch 56 to raise the worktable 70 along the second guide rails 36 and 38 to near the tip of the auger drill 16. At this time, the position of the center of gravity p of the worktable 70 is
As shown in FIG. 3, the work table 70 is at a position distant from the second guide rails 36 and 38, and a rotational moment acts on the work table 70 by its own weight.

The rotational moment causes the guide roller 8
2 and 84 are pressed against the second guide rails 36 and 38 and the guide rollers 82 and 84 rotate while the worktable 70 is rotated.
Rises smoothly. That is, since the rotational moment due to its own weight is received by the guide rollers 82 and 84, the work table 70
Moves smoothly.

Next, the operator on the workbench 70 instructs another worker on the ground side to operate the main winch 32 and lower the auger drive mechanism 12. Then, the board 64 is pivoted about the support shaft 66, moved from the storage position a to the work position b indicated by the two-dot chain line in FIG. 5, and the board 64 approaches the auger drill 16.

For example, in the connection operation, the auger drive mechanism 1
The auger drill 16 is inserted into the hexagonal hole formed in the second rotation shaft 72.
Since the hexagonal shaft at the end of the auger drill 16 is inserted, it is necessary to connect the rotary shaft 72 and the auger drill 16 in phase. At this time, the operator moves the auger drill 16 and aligns the cores so that the phases match, while instructing the operator on the ground to perform the inching operation of the rotating shaft 72. Auger drill 1
6 is inserted, the operator on the workbench 70
Insert the connecting pin into the pin insertion hole by hammering or the like.

In the state where the boarding platform 64 has been moved from the storage position a to the working position b, as shown in FIG.
The position of the center of gravity p of 0 also moves. The position of the center of gravity p is closer to the work position b, and a rotational moment is applied to the work table 70 accordingly. By this rotational moment, the guide roller 100 is pressed against the second guide rail 38, and the work table winch 56 is driven to move the work table 70 up and down in a state where the board 64 is in the work position b. Goes up and down smoothly.

Next, after the connection work is completed, the boarding base 64 is turned around the support shaft 66 toward the storage position a.
After reaching the storage position a, the worktable winch 56 is driven to lower the worktable 70. At that time, the work table 70
The guide rollers 82 and 84 are pressed against the second guide rails 36 and 38, and the work table 7 rotates while the guide rollers 82 and 84 rotate.
0 falls smoothly.

On the other hand, the moving table 42 is connected to the second guide rail 3.
To remove the guide roller 100 from the second guide rail 38, first, the push bolt 106 is rotated to the loosening side and the holder member 98 is slid by the urging force of the coil spring 108. . And pin 43
After the guide gib 40 is swung to separate from the second guide rails 36 and 38, the pin 43 is inserted to fix the guide gib 40. Thus, the moving table 42 can be easily removed from the second guide rails 36 and 38.

As described above, the present invention is not limited to such an embodiment, and can be implemented in various modes without departing from the gist of the present invention.

[0033]

As described above in detail, the work table lifting / lowering device for a pile construction machine of the present invention has a structure in which the guide roller is driven by the guide rail by the rotational moment due to the weight of the work table even if the center of gravity does not coincide with the suspension center. The work table is smoothly lifted and lowered.

[Brief description of the drawings]

FIG. 1 is a front view of a pile construction machine provided with a work bench lifting device for a pile construction machine as one embodiment of the present invention.

FIG. 2 is a side view of a pile construction machine provided with a pile construction machine worktable lifting / lowering device of the present embodiment.

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

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

FIG. 5 is an enlarged plan view when the workbench of the workbench lifting / lowering device for a pile construction machine according to the present embodiment is at the storage position.

FIG. 6 is an enlarged sectional view taken along the line BB of FIG. 4;

FIG. 7 is an enlarged cross-sectional view of CC of FIG.

FIG. 8 is an enlarged sectional view taken along the line DD in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pile construction machine main body 2 ... Leader 12 ... Auger drive mechanism 36, 38 ... 2nd guide rail 40 ... Guide gib 42 ... Moving table 48, 50 ... Wire 56 ... Work table winch 64 ... Boarding table 66 ... Support shaft 70 ... Work table 82, 84, 100: Guide roller

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 7/16 E04G 3/04

Claims (5)

(57) [Claims] 1. A pile construction machine for elevating and lowering a construction mechanism along a first guide rail provided on a standing leader, comprising: a second guide rail provided on the leader in parallel with the first guide rail; A worktable having a movable table slidably supported via a guide gib and a boarding table pivotally supported by the movable table is provided, and the worktable is moved up and down by wires fastened to the movable table. A workbench for a pile working machine, wherein a guide roller for receiving a rotational moment due to the weight of the worktable and contacting the second guide rail is attached to the movable table. lift device. 2. The work table lifting and lowering device for a pile working machine according to claim 1, wherein the guide roller is provided below the movable table. 3. The work table lifting and lowering device for a pile construction machine according to claim 1, wherein the guide roller is provided on one side surface of the movable table. 4. The work table lift for a pile construction machine according to claim 1, wherein the guide gib is swingably supported around a support shaft parallel to the second guide rail. apparatus. 5. The pile construction according to claim 4, wherein the guide roller attached to one side surface of the movable table is spring-biased in a direction away from the second guide rail by a spring biasing force. Workbench lift for machine.