JP2001329788A - Tunnel inner wall cutting machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a tunnel inner wall cutting machine suitable for cutting a tunnel inner wall by self-running. SOLUTION: In a tunnel inner wall cutting machine for cutting an inner wall of a tunnel by a cutter head 7, a traveling device 2 which travels in a tunnel 9 to move a main body 1, and a turret which rotates around a substantially vertical axis with respect to the main body 1. A boom 3, a slide base 4 that rotates about a substantially horizontal axis with respect to the turret boom 3, and a slide frame 5 that moves in a direction substantially perpendicular to the slide base 4. The head 7 was supported.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel inner wall cutting machine for cutting a tunnel inner wall by self-running.

[0002]

2. Description of the Related Art An old tunnel inner wall is cut to form a new tunnel inner wall in response to an accident in which the inner wall of the tunnel collapses as the concrete wall of the tunnel ages. That is being done.

However, if a conventional tunnel excavator for excavating the ground is used to cut the inner wall of the tunnel, the movement of moving the cutter head along the inner wall of the tunnel is limited, and the inner wall of the tunnel cannot be cut accurately. There was a point.

Further, in the conventional tunnel excavator, since a cutter boom for moving the position of the cutter head is large, it is difficult to reduce the size of the tunnel excavator in correspondence with a tunnel having a small cross section.

The present invention has been made in view of the above problems, and has as its object to provide a tunnel inner wall cutting machine suitable for cutting a tunnel inner wall by self-running.

[0006]

The first invention is applied to a tunnel inner wall cutting machine for cutting a tunnel inner wall with a rotating cutter head.

[0007] A traveling device that travels in the tunnel to move the main body, a turret boom that rotates about a vertical axis with respect to the main body, and a slide base that rotates about a horizontal axis with respect to the turret boom. And a slide frame that moves in a direction substantially perpendicular to the slide base, and the cutter head is moved via the slide frame.

In a second aspect based on the first aspect, a cutter boom swinging with respect to the slide frame is provided,
The cutter head is supported via the cutter boom.

According to a third aspect of the present invention, in the first or second aspect, as the traveling device, a sliding support base for slidably supporting the main body in a substantially horizontal direction, and a main body so as to float the slide support base. Lifting means for lifting the main body and moving the main body with respect to the sliding support table.

[0010] A fourth aspect of the present invention is any one of the first to third aspects of the present invention, further comprising a conveyor that conveys the slip from the front to the rear of the main body, and arranges the conveyor on the main body alongside the base end of the turret boom. To do.

[0011]

According to the first aspect of the present invention, when cutting the inner wall of a tunnel whose section is curved in an arc, the position of the main body is adjusted via the traveling device and the turning position of the turret boom is adjusted. The tip of the turret boom is arranged on the substantially curved center plane of the inner wall of the tunnel. Then, by moving the slide frame in a substantially vertical plane direction, disposing the cutter boom near the inner wall of the tunnel, and rotating the slide base, the cutter head is moved with an arc-shaped trajectory along the inner wall of the tunnel. As a result, the inner wall of the tunnel can be accurately cut.

When cutting the inner wall of the tunnel whose cross section has risen to a plane, the slide base is arranged near the inner wall of the tunnel by adjusting the position of the main body via the traveling device and adjusting the turning position of the turret boom. I do. By raising and lowering the slide frame, the cutter head can be moved along a linear trajectory along the inner wall of the tunnel, and the inner wall of the tunnel can be cut accurately.

Since the inner wall of the tunnel can be cut with high precision, the cutting speed of the inner wall of the tunnel can be increased to improve the cutting efficiency, and the rationalization of concrete spraying can be achieved.

In the second aspect of the present invention, the cutter head can be pressed against the inner wall of the tunnel by swinging the cutter boom in response to a minute change in the inner wall of the tunnel, regardless of the position and orientation of the cutting machine. High-precision cutting is possible.

In the third aspect of the present invention, since the traveling device slides the slide support at the lower portion of the main body, the space occupied by the traveling device is reduced in the vertical direction, and the size of the tunnel inner wall cutting machine can be reduced. .

The position of the main body can be easily adjusted by sliding the main body on the slide support table.

Since the sliding support base has a large ground contact area, the ground does not need to be damaged by the traveling of the traveling device.

According to the fourth aspect of the present invention, the conveyor and the base end of the turret boom are arranged side by side on the main body, so that the tunnel inner wall cutting machine can be prevented from being enlarged due to the installation space of the conveyor.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. A plane parallel to the bottom of the tunnel is defined as a horizontal plane, and an axis perpendicular to the horizontal plane is defined as a vertical axis.

As shown in FIGS. 1 and 2, the main body 1 of the tunnel inner wall cutting machine is self-propelled via a traveling device 2, and the main body 1 is tunneled through a pair of front and rear side riggers 11 projecting from its left and right. The cutter head 7 is rotated while being supported by the side wall of the tunnel to cut the inner wall of the tunnel.

The traveling device 2 comprises a sliding support 21 for supporting the main body 1 slidably in a substantially horizontal direction, and a sliding support 21
A traveling jack (hydraulic cylinder) 22 for moving the main body 1 in the front-rear direction, and a left-right moving jack (not shown) for moving the main body 1 in the left-right direction with respect to the slide support 21.

A skirt 23 has a pin 24 at the front of the body 1.
The skirt 23 swings via the skirt jack 25 so that the front portion of the main body 1 is lifted.

An elevating jack 26 is provided at the rear of the main body 1 so as to be able to expand and contract in a substantially vertical direction, and when the elevating jack 26 is extended, the rear part of the main body 1 is lifted.

The skirt 23, the skirt jack 25, and the lifting jack 26 constitute lifting means for lifting the main body 1 so as to float the slide support 21.

When the traveling device 2 moves forward, first, the skirt 23,
In a state where the main body 1 is lifted via the lifting jack 26 and the sliding support base 21 is floated, the traveling jack 22 is contracted to advance the sliding support base 21 with respect to the main body 1. Subsequently, in a state where the main body 1 is lowered via the skirt 23 and the lifting / lowering jack 26 and the sliding support base 21 is grounded, the traveling jack 22 is extended to advance the main body 1 with respect to the sliding support base 21. By this operation, the traveling device 2 moves forward by the stroke of the traveling jack 22.

When the traveling device 2 moves backward, the floating sliding support 21 is moved backward with respect to the main body 1, and then the main body 1 is moved backward with respect to the ground sliding support 21.

When the traveling direction of the traveling device 2 is changed, the strokes of the front and rear left and right moving jacks are made different from each other to expand and contract.

When the traveling device 2 is moved in parallel in the left-right direction, the strokes of the front and rear left-right moving jacks are made equal to each other to expand and contract.

As a gist of the present invention, a mechanism for moving the cutter head 7 includes a turret boom 3 that rotates about a substantially vertical axis with respect to the main body 1.
A slide base 4 that rotates about a substantially horizontal axis with respect to the turret boom 3, a slide frame 5 that moves in a direction substantially perpendicular to the slide base 4, and a cutter boom that swings with respect to the slide frame 5. 6 is provided.

As shown also in FIGS. 4 and 5, the turret boom 3 has its turntable 31 supported by the main body 1 via a bearing 32 so as to be rotatable about a substantially vertical axis Z. A turning jack 33 is interposed between the rear end of the turning table 31 and the main body 1. When the turning jack 33 expands and contracts due to the operating oil pressure, the turret boom 3 turns in the left and right directions from the main body center line O within an angle range of θ1 and θ2.

As shown in FIG. 6, the slide base 4 is supported by the tip of the turret boom 3 via a bearing 41 so as to be rotatable about a substantially horizontal axis Y. The mechanism for rotating the slide base 4 includes a ring gear 42 connected to the slide base 4, a pair of pinion gears 43 meshing with the ring gear 42, and hydraulic motors 44 for driving the respective pinion gears 43 to rotate. Each hydraulic motor 4
The slide base 4 is rotated via the respective pinion gears 43 and the ring gear 42 by the synchronous rotation of the slide base 4 by the operating oil pressure. The ring gear 42 also functions as an outer ring of the bearing 41. The ring gear 42 is covered by a cover 45.

As shown in FIGS. 7 to 9, the slide base 4 has a pair of guide rails 46.
The slide frame 5 is supported via the reference numeral 6 so as to be movable in a substantially vertical plane direction. Each guide rail 46 has a U-shaped cross section, and the slide base 4 includes a pair of slide rails 51 that slide in contact with each other so as to sandwich each guide rail 46.

A slide jack 52 is interposed between the slide base 4 and the slide frame 5. When the slide jack 52 expands and contracts by operating hydraulic pressure, the slide frame 5 moves in a substantially vertical plane direction.

The base end of the cutter boom 6 is swingably supported on the upper end of the slide frame 5 via a pair of pins 61. Each pin 61 is disposed so as to be substantially orthogonal to the moving direction of the slide frame 5, and the cutter boom 6 swings in the moving direction of the slide frame 5. A tilt jack 62 is interposed between the slide frame 5 and the cutter boom 6. When the tilt jack 62 expands and contracts by the operating oil pressure, the cutter boom 6 swings in the angle range of θ3 and θ4 with respect to the substantially horizontal axis Y.

A hydraulic motor 71 is connected to the swinging tip of the cutter head 7, and when the hydraulic motor 71 is rotated by the operating oil pressure, the cutter head 7 rotates to cut the inner wall of the tunnel. The cutter head 7 is provided with a cutter (not shown) for cutting the inner wall of the tunnel on an outer peripheral surface 72 having a cylindrical shape.

The cutter boom 6 is provided with a pair of nozzles 63 for spraying water on the left and right sides of the cutter head 7.

On the left side of the turret boom 3 on the main body 1, there is provided a conveyor 12 for transporting the shears from the front to the rear of the main body 1, and on the skirt 23, there is provided a gathering 13 for gathering the shears to the conveyor 12. It is done automatically.

In order to secure a space for installing the conveyor 12 on the main body 1, the swivel base 31 is offset to the right with respect to the main body center line O. The turret boom 3 is formed with a bent portion 35 in the middle thereof, and the distal end thereof is positioned at the center line O of the main body.
It is located above.

An operation panel 14 is provided at the rear of the turret boom 3 on the main body 1, a driver's seat 15 is provided at the rear of the operation panel 14, and a hydraulic control device 16 and the like are provided at the rear of the driver's seat 15. .

Next, the operation of the embodiment of the present invention configured as described above will be described.

The inner wall cutting machine of the tunnel runs by itself through the traveling device 2, so that the main body 1 can be easily moved even in response to the bending of the tunnel. The tunnel inner wall cutting machine comprises a pair of front and rear side riggers 1 whose main body 1 projects from the left and right.
While being supported by the side wall of the tunnel 9 via 1, the cutter head 7 is moved along the inner wall of the tunnel while rotating the cutter head 7 to cut the inner wall of the tunnel.

When cutting the inner wall of the tunnel whose section is curved in an arc shape, the position of the main body 1 is adjusted via the traveling device 2 and the turning position of the turret boom 3 is adjusted so that the tip of the turret boom 3 can be cut. Is disposed on the substantially curved center plane of the inner wall of the tunnel. Then, by moving the slide frame 5 in a direction substantially perpendicular to the slide base 4 and disposing the cutter boom 6 near the inner wall of the tunnel and rotating the slide base 4, the cutter head 7 is moved along the inner wall of the tunnel. It can be moved with a circular arc trajectory, and can cut the tunnel inner wall with high accuracy.

When cutting the inner wall of the tunnel whose section has risen to a planar shape, the slide base 4 is adjusted by adjusting the position of the main body 1 via the traveling device 2 and the turning position of the turret boom 3 so that the inner wall of the tunnel is cut. Is placed in the vicinity of. Then, by moving the slide frame 5 up and down, the cutter head 7 can be moved with a linear trajectory along the inner wall of the tunnel, and the inner wall of the tunnel can be cut accurately.

The cutter head 7 can be pressed against the inner wall of the tunnel by oscillating the cutter boom 6 in response to a minute change in the inner wall of the tunnel. Can be cut.

Since the inner wall of the tunnel can be cut with high accuracy in this manner, the cutting speed of the inner wall of the tunnel can be increased to improve the cutting efficiency, and the concrete spraying can be rationalized.

If a cutter for excavating the ground of the tunnel is provided at the tip of the cutter head 7, a new tunnel can be dug.

Since a mechanism such as a large cutter boom is not provided as a mechanism for moving the cutter head 7, a small-sized tunnel inner wall cutting machine corresponding to a tunnel having a small cross section can be realized.

The swivel 3 of the turret boom 3 is mounted on the main body 1.
1 and the conveyor 12 are provided side by side, and since the swivel base 31 is offset to the center line O of the main body, it is possible to avoid the tunnel inner wall cutting machine from being enlarged due to the installation space of the conveyor 12.

The traveling device 2 is mounted on the sliding support base 2
Due to the structure in which the sliding device 1 is slid, the space occupied by the traveling device 2 is reduced in the vertical direction, and the tunnel inner wall cutting machine can be reduced in size. By sliding the main body 1 on the slide support table 21, the position of the main body 1 can be easily adjusted in all directions of front, rear, left and right. Since the ground area of the sliding support base 21 is large, the ground does not need to be damaged by the traveling of the traveling device 2.

As another embodiment, the traveling device 2 may be constituted by crawlers or wheels.

As another embodiment, the cutter head 7
Alternatively, a mechanism for moving the cutter head 7 may be driven via an electric motor or the like.

It is apparent that the present invention is not limited to the above-described embodiment, and that various changes can be made within the scope of the technical concept.

[Brief description of the drawings]

FIG. 1 is a side view of a tunnel inner wall cutting machine showing an embodiment of the present invention.

FIG. 2 is a plan view of the tunnel inner wall cutting machine.

FIG. 3 is a front view of the tunnel inner wall cutting machine.

FIG. 4 is a side view of the turret boom and the like.

FIG. 5 is a plan view of a turret boom and the like.

FIG. 6 is a front view of the turret boom and the like.

FIG. 7 is a side view of the slide frame and the like.

FIG. 8 is a plan view of a slide frame and the like.

FIG. 9 is a front view of the slide frame and the like.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Traveling device 3 Turret boom 4 Slide base 5 Slide frame 6 Cutter boom 7 Cutter head 11 Side rigger 21 Sliding support stand 22 Running jack 23 Skirt 25 Skirt jack 26 Elevating jack 31 Swing table 32 Bearing 33 Swing jack 41 Bearing 42 Ring gear 43 Pinion gear 44 Hydraulic motor 46 Guide rail 52 Slide jack 61 Pin 62 Tilt jack 71 Hydraulic motor

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Naomune Tamura 2-1-1, Shibadaimon, Minato-ku, Tokyo Fuji Building Nippon Mining Machinery Co., Ltd. F-term (reference) 2D054 AC20 BA03 DA02

Claims (4)

[Claims] 1. A tunnel inner wall cutting machine for cutting an inner wall of a tunnel by a rotating cutter head, comprising: a traveling device that travels in a tunnel to move a main body; and a turret boom that rotates about a substantially vertical axis with respect to the main body. A slide base that rotates about a substantially horizontal axis with respect to the turret boom, and a slide frame that moves in a direction substantially perpendicular to the slide base, and moves the cutter head via the slide frame. An inner wall cutting machine for a tunnel, characterized in that: 2. The tunnel inner wall cutting machine according to claim 1, further comprising a cutter boom swinging with respect to the slide frame, wherein the cutter head is moved via the cutter boom. 3. A traveling device comprising: a sliding support base for slidably supporting the main body in a substantially horizontal direction; and lift means for lifting the main body so as to float the sliding support base. The tunnel inner wall cutting machine according to claim 1 or 2, wherein the main body is moved relative to the main body. 4. The turret boom according to claim 1, further comprising a conveyor for transferring the slip from the front to the rear of the main body, wherein the conveyor is arranged on the main body alongside a base end of the turret boom. The tunnel inner wall cutting machine according to any one of the above.