JP3616800B2 - Boring machine leader support device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a leader support device for a boring machine that is used for civil engineering and can store a leader substantially horizontally above a base machine during transportation.
[0002]
[Prior art]
Conventionally, Japanese Utility Model No. 5-26111 has been disclosed as a leader support device for a pile driver.
As shown in FIGS. 5 and 6, the pile driving machine 10 includes a leader support frame 13 attached to a front bracket 12 of a base machine 10 with pins 14 a and 14 b via two sets of front and rear brackets 13 a, 13 b and 13 c and 13 d. The reader support frame 13 is pivotally supported at the base end of the leader 15 and the hoisting cylinder 16, and the side end of the leader support frame 13 is erected on the front bracket 12. It was connected to the moving cylinder 17.
[0003]
The leader support frame 13 is rotated in the left-right direction of the pile driving machine 10 by the expansion and contraction of the rotation cylinder 17, so that the reader 15 is tilted in the left-right direction. In addition, the leader 15 is raised and lowered by the expansion and contraction of the raising and lowering cylinder 16, and the raising and lowering cylinder 16 is fully retracted, so that the leader 15 can be stored in the upper part of the base machine 11 while being transported. It was.
[0004]
[Problems to be solved by the invention]
However, the rotating cylinder 17 not only has a function of rotating the reader 15 left and right, but also supports the load applied to the reader 15 together with the pins 14a and 14b during work.
[0005]
Accordingly, it is necessary to fix the rotating cylinder 17 by closing the flow of oil in the rotating cylinder 17 during the operation (for example, closing the operation valve). However, a considerable load is applied to the rotating cylinder 17. As a result, the piston of the rotating cylinder 17 and the seal of the piston rod, the valve or the like are likely to be worn out.
[0006]
The present invention has been made in view of the above-described circumstances, and the lower part of the leader is pivotally supported by and supported by the tip of the leader support shaft disposed in the front-rear direction of the front bracket of the base machine. Is rotated by a cylinder for rotating the shaft attached to the front bracket, thereby tilting the reader in the left-right direction.
[0007]
[Means for Solving the Problems]
The leader support device of the boring machine of the present invention includes a leader on which a drill head is mounted so as to be movable up and down,
A leader support shaft that is disposed in the front bracket in the front and rear direction of the base machine and pivotally pivotable, and a lower part of the leader is pivotally attached to the tip so that the leader can be undulated in the longitudinal direction;
And a forward / reverse rotation means for the leader support shaft.
[0008]
Further, the leader support device of the boring machine of the present invention is arranged in the front-rear direction and pivotally mounted on the front bracket of the base machine and the leader on which the drill head is mounted so as to be movable up and down. A leader support shaft having a lower part of the leader pivoted so that the leader can be undulated in the front-rear direction, and a first hub pivotally attached to the leader and fixed to the leader support shaft. One end is pivotally attached to the tip of an undulation cylinder which is pivotally attached and undulates the leader in the front-rear direction by expanding and contracting, and a second hub fixed to the leader support shaft at a substantially right angle, A shaft rotating cylinder having the other end pivotally attached to a bracket erected laterally from the front bracket is provided.
[0009]
The first hub fixed to the leader support shaft of the leader support device of the boring machine according to the present invention is rotatably fitted on the leader support shaft.
[0010]
Further, the leader support shaft of the leader support device of the boring machine according to the present invention is characterized in that the first hub and the second hub are separated and each is pivotally attached to the front bracket.
[0011]
[Action]
The lower part of the leader is pivotally attached to the tip of the leader support shaft, and can be raised and lowered in the front-rear direction by a raising and lowering cylinder.
[0012]
The leader is supported by the front bracket via a leader support shaft.
[0013]
In addition, the leader support shaft is rotated in the left-right direction by the shaft-rotating cylinder in a state where the load from the reader is supported, and the reader tilts in the left-right direction.
[0014]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1-4, 25 is a leader, 22 is a front bracket. As shown in FIGS. 2 to 4, the boring machine 20 has a front bracket 22 disposed in front of a base machine 21, and a drill head ( A reader 25 to which an elevator (not shown) is attached is erected, and the leader 25 is configured to be able to undulate in the front-rear direction and tilt in the left-right direction.
As shown in FIG. 1, the leader 25 is pivotally supported on the front end of a leader support shaft 23 that is disposed on the front bracket 22 in the front-rear direction and is rotatable via a pin 23a. A first hub 28 is disposed at the rear portion of the leader support shaft 23, and the proximal end of the hoisting cylinder 26 (FIGS. 2 to 4) is pivotally attached to the pin 28b of the first bracket 28a erected on the first hub 28. The tip of the undulation cylinder 26 is pivotally attached to the leader 25 via a pin 25a (FIGS. 2 to 4).
[0015]
A second hub 29 is disposed at the front portion of the leader support shaft 23, and an arm 29a is erected at a right angle thereto.
A bracket 22a is erected on the side of the front bracket 22, and a shaft rotation cylinder 31 is attached between the tip of the arm 29a and the tip of the second bracket 22a via pins 29b and 22b.
[0016]
FIG. 2 is a side view for explaining the first invention. The first hub 28 is fixed to the leader support shaft 23 by a key 28c. Of course, the second hub 29 is fixed to the reader support shaft 23 by a key or other means (not shown).
In this case, when the leader support shaft 23 is rotated by the shaft rotation cylinder 31, both the reader 25 and the undulation cylinder 26 are forcibly tilted by a predetermined angle.
[0017]
FIG. 3 is a side view for explaining the second aspect of the invention. The first hub 28 is rotatably fitted on the leader support shaft 23, and the leader support shaft 23 is rotated by the shaft rotation cylinder 31. The reader 25 is forcibly tilted by a predetermined angle, and the undulation cylinder 26 is also tilted by a predetermined angle when pulled.
[0018]
FIG. 4 is a side view for explaining the third invention. The first hub 28 is rotatably fitted to the leader support shaft 23 in the same manner as FIG. 3, and the first hub 28 and the first hub 28 of the leader support shaft 23 are As shown in FIG. 3, when the leader support shaft 23 is rotated by the shaft rotation cylinder 31, the reader 25 is forcibly tilted by a predetermined angle and pulled by this. Accordingly, the undulating cylinder 26 is also tilted by a predetermined angle.
[0019]
In FIGS. 2 to 4, when the hoisting cylinder 26 is expanded and contracted, the leader 25 tilts back and forth to maintain the vertical required for work.
During transportation, when the undulation cylinder 26 is fully contracted, the leader 25 is stored substantially horizontally on the upper portion of the base machine 21.
Further, when the shaft rotation cylinder 31 is expanded and contracted in a state where the reader 25 is erected, the reader 25 is tilted by a predetermined angle in the left-right direction, and the reader 25 is made vertical.
Therefore, by operating the hoisting cylinder 26 and the shaft rotating cylinder 31, the reader 25 can be held in a vertical state necessary for work or at a necessary angle.
[0020]
2 to 4 show a crawler type boring machine, the present invention can be applied to a boring machine having no tire traveling type or other traveling means, and also a construction machine having a pile driving machine or other leader. All are applicable.
[0021]
【The invention's effect】
According to the present invention described in detail above, the following effects can be obtained.
(1) The reader is supported by only the reader support shaft and is rotated by the shaft rotating cylinder. Since the reader does not receive the load of the reader as well as the rotation unlike the conventional rotating cylinder, the reader The tilting motion in the left-right direction is stable.
[0022]
(2) Since a large load is not always applied to the cylinder, there is little damage to the rotating cylinder, and the service life of the rotating cylinder can be extended.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a side view of the first invention showing an embodiment of the present invention.
FIG. 3 is a side view of the second invention showing an embodiment of the present invention.
FIG. 4 is a side view of the third invention showing an embodiment of the present invention.
FIG. 5 is a side view of a leader support device of a conventional pile driver.
FIG. 6 is a side view of a conventional pile driver.
[Explanation of symbols]
20 boring machine 21 base machine 22 front bracket 22a first bracket 23 leader support shaft 25 leader 26 hoisting cylinder 28 first hub 29 second hub 29a arm 31 shaft rotating cylinder

Claims (4)

A reader with a drill head mounted so as to be movable up and down;
A leader support shaft that is disposed in the front bracket of the base machine in the front-rear direction and pivotally pivotable, and a lower part of the leader is pivotally attached to the tip so that the leader can be raised and lowered;
A leader support device for a boring machine, comprising: forward / reverse rotation means for the leader support shaft. A reader with a drill head mounted so as to be movable up and down;
A leader support shaft that is disposed in the front bracket of the base machine in the front-rear direction and pivotally pivotable, and a lower part of the leader is pivotally attached to the tip so that the leader can be raised and lowered;
A undulation cylinder that is pivoted in the middle of the leader, a proximal end is pivotally attached to a first hub fixed to the leader support shaft, and undulates the leader in the front-rear direction by expanding and contracting;
A shaft having one end pivotally attached to the tip of an arm standing substantially perpendicular to the second hub fixed to the leader support shaft, and the other end pivotally attached to a bracket standing sideways from the front bracket. A leader support device for a boring machine, comprising a turning cylinder. The leader support device for a boring machine according to claim 1 or 2, wherein the first hub is rotatably fitted to the leader support shaft. 3. The leader support device for a boring machine according to claim 2, wherein the leader support shaft is separated from the first hub and the second hub and is pivotally attached to the front bracket.

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