JP3688379B2 - Underground continuous wall excavator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an underground continuous wall excavator suitable for creating a continuous wall in the ground .
[0002]
[Prior art]
As a machine to create a continuous wall in the ground, a guide post is mounted on a base machine that can run freely, and a chain member with excavating blades projecting at a predetermined pitch on the outer surface can be rotated endlessly on the outer peripheral surface of the guide post An underground continuous wall excavator wound around is known.
[0003]
In the conventional excavator, the operation of inserting the guide post into the ground, so-called dredging, is performed as follows. That is, a hole is excavated by a separately prepared hole excavator, a guide post is inserted into the hole, and then the base machine is run to cut through the ground. A short guide post is press-fitted into the ground. The measures are taken.
[0004]
[Problems to be solved by the invention]
However, as in the conventional case described above, two types of work machines must be prepared at the site when using a separate pit drilling machine, and there are many work processes when the guide posts are sequentially added and press-fitted into the ground. Therefore, all of the above problems have been complicated, resulting in poor work efficiency and increased construction costs.
[0005]
[Means for Solving the Problems]
The means described in claim 1 for solving the above problem is as follows.
A guide post is mounted on a freely movable base machine, and an endless chain member with a drilling blade is rotatably mounted along the outer periphery of the guide post to rotate the chain member. The continuous wall excavator that cuts the ground by inserting the guide post into the ground and running the base machine to create a continuous wall in the ground,
A horizontal posture extending horizontally, a state in which the chain member is rotated while further rotating the guide post from a state where the lower end of the guide post is grounded, and a state in which the chain member is rotated and the chain member is rotated A mounting mechanism that pivotably mounts the guide post to the base machine so that the guide post can swivel in one plane between a vertical posture in which the base machine is driven to create a continuous wall;
A drive mechanism for driving and turning the guide post;
And a locking mechanism for fixing the guide post to the base machine so as not to turn in the horizontal posture and the vertical posture.
[0006]
Moreover, the means described in claim 2 is the underground continuous wall excavator described in claim 1,
A guide rail extending in the same direction as the guide post, connected to the guide post on the side opposite to the guide post with respect to the mounting mechanism;
A balance weight which is provided on the guide rail and is slidable in a direction to contact and separate from the guide post;
When the guide post is swung from the horizontal posture to the vertical posture, the balance weight is moved to the side approaching the guide post, and when the guide post is swung from the vertical posture to the horizontal posture, the guide post is moved from the guide post. A moving mechanism for moving the balance weight to the side to be separated;
Is further provided.
[0007]
Therefore, at the time of continuous wall construction, the base machine is installed at the enforcement site, the lower end of the guide post is swung so as to approach the ground surface, and then the lower end is swung to ground to rotate the chain member. The guide post is further swiveled while excavating, and after the lower end of the guide post reaches the lowest position, the base machine is moved in the direction of continuous wall formation and advanced through the ground, while chemicals such as mortar are used. A continuous wall can be created by injecting a liquid.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings. The base machine 1 has left and right crawlers 2, 2, and a lower end of a gate-shaped guide frame 4 is provided on one side of the gantry 3 that supports the crawlers 2, 2 (one side in the traveling direction of the crawlers 2, 2). The upper portion of the guide frame 4 and the other side of the frame 3 are connected by a stay 5 for reinforcement.
[0009]
The aforementioned guide frame 4, the rail 6, 6 on the upper and lower portions of the outer surface is provided horizontally, and the rail 6, 6, the upper end of the drive unit 8 of the guide post 7 is the guide rail 9 A support member 10 fixed by being sandwiched is supported by rollers 11 so as to be movable in the horizontal direction.
[0010]
A sprocket 12 is supported on the guide post 7 in the drive unit 8 at the upper end, and a guide wheel 13 is pivotally supported on the lower end. A chain member 14 is wound around the sprocket 12 and the guide wheel 13. Endless rotation is possible along the outer periphery of the guide post 7.
[0011]
Excavation blades 16 are attached to the outer surface of the chain member 14 with a fixed pitch via an attachment seat 15 as shown in part in FIG. 5, and the sprocket 12 is attached to the sprocket 12 as shown in FIG. The excavation motor 17 mounted on the drive unit 8 is rotated through gears 18 and 19 so that the chain member 14 is rotated endlessly. This rotation transmission may be by means of chain in addition to the gear.
[0012]
A guide post 7 including the guide rail 9 is mounted on the support member 10 so as to be rotatable in a vertical plane. In the illustrated embodiment, as shown in FIG. 3, a ring gear 20 is fixed to the support member 10, and a circular guide ring 21 fixed to the guide rail 9 is provided on the inner periphery of the ring gear 20 via a slewing bearing 22. The ring gear 20 is engaged with a pinion 24 that is rotatably attached to the guide rail 9 and is rotated by a turning motor 23 fixed to the guide rail 9, and the pinion 24 moves around the ring gear 20 by the driving of the turning motor 23. By rotating, both the guide rail 9 and the guide post 7 are configured to pivot in a vertical plane.
[0013]
The guide rail 9 is provided with a rotation lock mechanism 25 for locking the turning motion together with the guide post 7. The rotation lock mechanism 25 is inserted and supported by a bearing portion 26 provided on the side surface of the guide rail 9 so as to be movable forward and backward in a horizontal direction, as shown in FIG. 4A and a lower surface in FIG. A lock pin 27, a cylinder 28 whose base end is pivotally supported by the guide rail 9, and a substantially L-shaped interlocking lever 30 whose intermediate portion is pivotally supported by a pin 29 on the guide rail 9 side. A long hole 30a at one end of the lever 30 and the inner end of the lock pin 27 are connected by a pin 31, and the other end of the interlocking lever 30 is connected to a piston rod 28a of the cylinder 28 by a pin 32. The lock pin 32 retracts into the guide rail 9 by the extension operation of the rod 28a, and the lock pin 27 protrudes from the guide rail 9 by the shortening operation of the piston rod 28a, as shown in FIG. And fitted into the lock hole 33 of the support member 10 is configured to be locked in. Therefore, by providing the lock hole 33 at a position corresponding to the vertical position and the horizontal position of the guide post 7, it is possible to lock at that position.
[0014]
A balance weight 34 is slidably attached to the guide rail 9, and the balance weight 34 is connected to a piston rod 35 a of a hydraulic cylinder 35 supported along the guide rail 9. It is designed to slide over.
[0015]
1 is a sliding cylinder used when the guide post 7 including the guide rail 9 needs to be moved in the lateral direction. The piston rod is fixed to the guide rail 9 in the horizontal direction. The tip end portion 37 of the guide rail 4 can be fixed to the guide frame 4 by inserting / removing the pin 38, and the cylinder 36 is operated in the fixed state, whereby the guide rail 9 is moved laterally with respect to the guide frame 4 by the reaction force. It is like that. Therefore, the guide post 7 including the guide rail 9 can be moved in the lateral direction by the scooping insect movement by drilling the holes for the pins 38 in the guide frame 4 at regular intervals.
[0016]
In FIG. 1, reference numeral 39 denotes a ladder for climbing on the guide frame 4, 40 denotes a handrail, and in FIG. 5, reference numeral 41 denotes a chemical liquid pouring outlet such as mortar supplied through a passage in the guide post 7.
[0017]
Next, the effect | action of the said embodiment is demonstrated with reference to FIG. 6 (A)-(D).
[0018]
At the time of building the continuous wall, as shown in FIG. 6A, the guide posts 7 and the guide rails 9 are set in a horizontal posture, and the crawlers 2 and 2 of the base machine 1 are moved to move to the enforcement site. Then, the turning motor 23 is driven to rotate the pinion 24 so that the lower end of the guide post 7 is positioned at the continuous wall forming position, and the pinion 24 relatively moves around the ring gear 20 to move the lower end of the guide post 7. Ground.
[0019]
Next, the excavating motor 17 is driven to rotate the sprocket 12 through the gears 18 and 19, the chain member 14 is rotated endlessly, and the excavating blades 16, 16. Or it is swung in the direction of arrow A in FIG. During the above operation, the piston rod 35a of the hydraulic cylinder 35 is shortened so that the balance weight 34 is lowered to the lowest lowered position so that the lower end of the guide post 7 can be easily lowered.
[0020]
After the guide post 7 reaches the vertical posture in this way, the cylinder 28 of the rotation lock mechanism 25 is shortened to cause the lock pin 27 to protrude and fit into the lock hole 33 of the support member 10 to be fixed in the vertical posture (FIG. 6). (C)).
[0021]
Next, the base machine 1 is moved in the continuous wall formation direction (arrow B direction) while the ground is cut by the excavating blades 16, 16... Of the chain member 14, while the chemical solution is poured out from the chemical solution outlet 41, and kneaded with the earth and sand. Then, a continuous wall is created (FIG. 6D).
[0022]
At the end of excavation work, the piston rod 35a of the hydraulic cylinder 35 is extended to slide the balance weight 34 toward the upper end of the guide rail 9, and the piston rod 28a of the cylinder 28 of the rotation lock mechanism 25 is extended to lock pin. 27 is removed from the lock hole 33, and then the turning motor 23 is driven to rotate the guide post 7 in the opposite direction to the state shown in FIG. Here, the lock pin 27 of the rotation lock mechanism 25 is moved forward again and fixed to the support member 10.
[0023]
In the illustrated embodiment, the guide post 7 is mounted so as to be pivotable within a vertical plane. However, if the lower end of the guide post 7 is grounded and the ground member can be excavated by the chain member 14 during the pivoting motion. You may make it turn in the plane inclined by the required angle.
[0024]
【The invention's effect】
As described above, according to the present invention, since excavation in the dredging direction at the time of continuous wall construction can be performed only by rotating the guide post, dredging excavation by introduction of a dredging excavator as in the past or guide There is no need to add a post or the like, eliminating the complexity of the work and greatly improving the work efficiency.
[0025]
Also, when the base machine is traveling, it is placed in a horizontal posture on one side parallel to the traveling direction, so that it can be immediately excavated by laying down on the enforcement location and rotating the guide post downward, The workability can be improved.
[0026]
If the guide rail is continuously provided at the upper end of the guide post as in claim 2 and the balance weight is slidably provided on the guide rail, the power during the upward rotation of the guide post can be reduced, Lightly can be converted to a horizontal posture.
[Brief description of the drawings]
FIG. 1 is a front view illustrating a state in which a guide post is in a vertical posture according to an embodiment of the present invention.
FIG. 2 is a front view of the same.
FIG. 3 is an enlarged side view in which a part near the upper part of the guide post is taken as a cross section.
4A and 4B are a front view and a bottom view of a rotation lock mechanism, respectively.
FIG. 5 is an enlarged front view showing the vicinity of the lower end of the guide post.
FIGS. 6A to 6D are operation explanatory views.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base machine 3 Base 4 Guide frame 6 Rail 7 Guide post 8 Drive part 9 Guide rail 10 Support member 12 Sprocket 13 Guide wheel 14 Chain member 16 Excavation blade 17 Excavation motor 20 Ring gear (mounting mechanism)
21 Guide ring (mounting mechanism)
22 Slewing bearing (mounting mechanism)
23 Rotating motor (drive mechanism)
24 pinion (drive mechanism)
25 Rotation lock mechanism (lock mechanism)
27 Lock pin (lock mechanism)
33 Lock hole (lock mechanism)
34 Balance Weight
35 Hydraulic cylinder (movement mechanism)
36 Cylinder for lateral sliding

Claims (2)

A guide post is mounted on a movable base machine, and an endless chain member with an excavating blade is rotatably mounted along the outer periphery of the guide post to rotate the chain member. The continuous wall excavator that cuts the ground by inserting the guide post into the ground and running the base machine to create a continuous wall in the ground,
A horizontal posture extending horizontally, a state where the chain member is rotated while further rotating the guide post from a state where the lower end of the guide post is grounded, and a state where the chain member is rotated and the chain member is rotated while the chain member is rotated. A mounting mechanism that pivotably mounts the guide post to the base machine so that the guide post can swivel in one plane between a vertical posture in which the base machine is driven to create a continuous wall;
A drive mechanism for driving and turning the guide post;
A locking mechanism for fixing the guide post to the base machine so as not to pivot in the horizontal posture and the vertical posture;
An underground continuous wall excavator characterized by comprising: A guide rail extending in the same direction as the guide post, which is connected to the guide post on the side opposite to the guide post with respect to the mounting mechanism;
A balance weight which is provided on the guide rail and is slidable in a direction to contact and separate from the guide post;
When the guide post is swung from the horizontal posture to the vertical posture, the balance weight is moved to the side approaching the guide post, and when the guide post is swung from the vertical posture to the horizontal posture, the guide post is moved from the guide post. A moving mechanism for moving the balance weight to the side to be separated;
The underground continuous wall excavator according to claim 1, further comprising:

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