JP4352382B2 - Tunnel wall cutting equipment - Google Patents

Description

  The present invention relates to a cutting device used for removing a surface deterioration portion of a tunnel wall surface during repair work on an existing tunnel wall surface.

  When an existing tunnel wall surface such as a road or a water channel becomes obsolete, there is a risk that the concrete of the tunnel wall is cracked or peeled, the strength of the tunnel wall surface is reduced, and water leakage or collapse occurs. Therefore, it is necessary to perform repair work such as cutting the deteriorated portion of the tunnel wall surface from the surface side at a certain depth and spraying new concrete.

  Conventionally, as a cutting device for cutting deteriorated concrete on a tunnel wall surface having a fixed cross-sectional shape at a certain depth, there is one described in Japanese Patent Laid-Open No. 2-252889. In this cutting apparatus, a cutting tool provided with a plurality of cutting picks on a circumferential surface of a cylindrical cutter head is arranged in front of a crawler type work vehicle via a parallel support link mechanism and a swivel seat, In order to cut the deteriorated concrete on the tunnel wall surface at a certain depth by the cutting device, first, the vehicle body is moved to a predetermined position, and the swivel seat is positioned on a vertical line passing through the center of the inner peripheral surface of the tunnel. After the adjustment, the angle of the parallel support link mechanism is adjusted so that the inner peripheral surface of the tunnel matches the revolution radius of the cutter head.

  At this time, since the cutter head and the swivel seat are connected via a parallel support link mechanism, the rotation axis of the cutter head and the rotation shaft of the swivel seat are parallel and face in the horizontal direction. The plane is parallel to the inner circumferential surface of the tunnel in the axial direction. When the rotating seat is rotated while rotating the cutter head in this state, the cutter head revolves along the tunnel wall surface with the parallel support link mechanism as an arm, and the tunnel wall surface can be cut at a certain depth. .

  Further, in order to cut a tunnel wall surface having an irregular cross-sectional shape using the cutting device, cutting is performed while finely adjusting the parallel support link mechanism so that the cutter wall always cuts the tunnel wall surface to a predetermined depth. Although it is necessary to adjust the parallel support link mechanism by manual operation while the operator visually observes it, it is necessary to be skilled, especially in an environment where dust from cutting stands near the cutter head. May be difficult to adjust.

Therefore, electronic control means that uses leather light to detect the attitude of the aircraft, detect the position of the cutting tool, input various data such as the positional relationship between the tunnel wall surface and the cutting tool, calculate, output operation commands, and display images. Although the cutting means described in Japanese Patent Laid-Open No. Hei 4-38399, which uses it to control the cutting depth, is also presented, this method has a problem that the entire system becomes extremely complicated and expensive. .
Japanese Patent Laid-Open No. 2-252892 JP-A-4-38399

  The present invention solves the problem of making the cutting depth of deteriorated concrete constant on the existing tunnel wall without using a complicated and expensive system consisting of a combination of electrical and optical means as described above. Therefore, an object of the present invention is to provide a cutting device capable of cutting at a constant depth with a simple device and an easy operation.

In the present invention, in order to solve the above-mentioned problem, a casing is extended on the front end side of a mounting flange mounted on a bracket provided at the front end of an undulating arm portion protruding from a work vehicle, A pair of horizontal shafts extending in the left-right direction are provided at the front end of the casing so as to face each other, and the one horizontal shaft can be rotated by a power source provided adjacent to the casing and on the circumferential surface. A cutting drum having a cutting pick is mounted, and a guide roller having a predetermined diameter smaller than that of the cutting drum is detachably mounted on the other horizontal axis, and the bottom wall is cut to a certain depth by the cutting drum. that the guide roller is pressed against the existing wall surface, by the guide rollers cutting into the bottom wall portion by cutting drum becomes stopper is limited, already said guide rollers Pressing of the tunnel wall, it made it possible this is a constant milling depth by a cutting drum as a guide wall.

  Further, by making the guide roller detachable, guide rollers having different diameters can be appropriately selected and used, and the cutting depth can be made variable.

  Further, the position of the cutting drum and the guide roller can be reversed by the rotation mechanism, so that the tunnel wall surface is sequentially predetermined in the length direction by simply rotating the cutting portion at a predetermined position without moving the work vehicle. It is possible to improve workability by cutting each width.

The tunnel wall surface cutting device according to the present invention has a configuration in which a cutting drum is provided on one of a pair of horizontal shafts that project from the tip of the cutting portion and a guide roller is provided on the other side. It was possible to cut the tunnel wall surface at a certain depth with a cutting drum by pressing it against the tunnel wall surface and using it as a guide wall.
Further, by making the guide roller detachable, it becomes possible to make the cutting depth variable by appropriately selecting and using guide rollers having different diameters.
Furthermore, since the positions of the cutting drum and the guide roller can be reversed by the rotation mechanism, the left and right tunnel wall surfaces can be completely moved at the same location by simply rotating the cutting portion at a predetermined position without moving the work vehicle. It was possible to cut over the circumference.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows an example of a preferred embodiment of the present invention. A cutting apparatus 1 includes a vehicle body portion having a driver's seat 5 and a hydraulic unit 6 on a frame 3 that supports left and right crawlers 2 and 2 for traveling. 7 is mounted so as to be rotatable about the rotation shaft 4, and an arm portion 8 having a cutting portion 10 at the tip is provided in front of the vehicle body portion 7 so as to be undulated by drive cylinders 81, 82, 83. Has been.

  FIG. 2 shows an enlarged longitudinal sectional view of the cutting portion 10. A rotating shaft 18 is disposed at the center of the bracket 11 disposed at the tip of the arm portion 8 (see FIG. 1), and its protrusion. A substantially rectangular parallelepiped casing 13 is attached to the front end via an attachment flange 12 so as to be rotatable about the rotation shaft 18.

Further, on the bracket 11 side of the mounting flange 12, a rotation that meshes with a gear 16 that is rotated by a hydraulic motor 15 that is attached to the bracket 11 via a rotating frame 19 to rotate the casing 13 around the rotating shaft 18. A bearing 17 is disposed around the rotary shaft 18.

  Further, a hydraulic motor 21 is disposed on the vertical flange 20 provided on the side surface of the base end portion of the casing 13. The hydraulic motor 21 is covered with a motor cover 22, and an output shaft 23 of the hydraulic motor 21 is inserted into the casing 13 through the center of an upper sprocket 24 provided at the upper part of the casing 13.

  A horizontal shaft 25 is provided on the right side of the lower end portion of the casing 13 so as to protrude in the horizontal direction. The horizontal shaft 25 passes through a shaft support portion 26 and a lower sprocket 27 located in the lower portion of the casing 13. A chain 28 (shown by a one-dot chain line) is wound around the upper sprocket 24 and the lower sprocket 27, and these constitute a chain drive type power transmission mechanism that transmits the rotation of the hydraulic motor 21 to the horizontal shaft 25. ing. In place of the hydraulic motor 21, a gasoline engine, a diesel engine, or an electric motor may be used.

  A receiving seat 29 is locked to the front end of the horizontal shaft 25 by a bolt A, and the cutting drum 14 is mounted on the receiving seat 29 so as to be replaceable via bolts B and B. A plurality of cutting picks 30 are attached to the surface via a plurality of planting bases 31. Then, the cutting pick 30 is cut by rotating the cutting drum 14 by the above-described chain drive type power transmission mechanism. Further, a guide roller 40 made of, for example, steel having a smaller diameter than the cutting drum 14 is detachably provided on the lower left side of the casing 13. The power transmission mechanism is not limited to the chain drive system, and may be a conventionally known direct drive system, speed reducer drive system, or the like in this type of apparatus.

  FIG. 3 is an exploded perspective view showing a means for attaching the guide roller 40 to the casing 13, and a mounting portion 41 having a cylindrical shape and having bolt holes a and a is extended from the lower left side of the casing 13. The mounting cylinder 42 having the same diameter as the mounting portion 41 and having a cylindrical receiving seat 43 and a cylindrical shaft 44 standing on the surface thereof is provided with bolts C, C via bolt holes a, a and through holes b, b. It is latched by the attachment part 41 by. Further, a cylindrical shaft 46 having bolt holes c and c is fitted into the column shaft 44 to form a rotary bearing 45.

  Further, a mounting projection 47 having the same diameter as the cylindrical shaft 46 and having through holes d and d is provided on the side surface of the guide roller 40. The guide roller 40 has bolt holes c and c and through holes d and d. And is secured to the cylindrical shaft 46 of the rotary bearing 45 by bolts D and D. Therefore, the guide roller 40 is detachable, and the guide roller 40 having a different diameter can be attached. As shown in FIG. 2, the guide roller 40 can rotate around the rotary bearing 45.

  In order to cut the tunnel wall surface with the cutting device 1 as described above, as shown in FIGS. 1 and 4, the cutting device 1 is arranged at the center of the tunnel cross section, and the cylinders 81, 82, 83 are driven to arm The angle of the portion 8 is adjusted, and cutting is started from the bottom wall portion YR portion of the cutting wall surface X located on the right side in the cross section of the tunnel T by the cutting pick 30 provided on the peripheral surface of the cutting drum 14.

  When the bottom wall portion YR is cut to a certain depth by the cutting pick 30, the guide roller 40 is pressed against the existing wall surface Z as shown in FIG. For this reason, the guide roller 40 serves as a stopper, and cutting to the bottom wall portion YR by the cutting pick 30 is restricted, so that the bottom wall portion YR is not cut deeper than this.

  After the cutting of the bottom wall portion YR, the guide roller 40 is in contact with the existing wall surface Z, and the cutting pick 30 is in contact with the cutting wall surface X. In this state, as shown in FIG. When it is driven to turn the arm portion 8 (indicated by the alternate long and short dash line) to move the cutting portion 10 toward the top of the tunnel T, the guide roller 40 becomes a stopper as described above, and at least the cutting wall surface X is cut by the cutting pick 30. The right half circumference shown in FIG. 1 can be cut at a certain depth. Since the guide roller 40 is rotatably supported, the guide roller 40 only rotates on the existing wall surface Z even if it is moved while being pressed against the existing wall surface Z. There is no.

  Further, if the cutting wall surface X on the left half of the tunnel T shown in FIG. 1 is cut as it is, the cutting drum 14 and the guide roller 40 are reversed from the previous positional relationship, and the cutting drum 14 is brought into contact with the existing wall surface Z. The guide rollers 40 are respectively positioned on the cutting wall surface X, and the cutting wall surface X corresponding to the right half circumference cannot be cut to a predetermined depth that is the same as that of the right bottom wall portion YR. Therefore, the casing 13 is rotated by 180 degrees about the rotation shaft 18 through the rotary bearing 17 engaged with the gear 16 by driving the hydraulic motor 15, and the cutting drum 14 is set on the cutting wall surface X and the guide roller 40 is set on the existing wall surface Z. By making it located, the cutting wall surface X of the same surrounding surface can be cut without any trouble.

  Note that the present invention improves the attachment part of the conventional twin header and has a structure in which a guide roller is provided on one side of the twin header, so that it is not necessary to newly develop a device for cutting the tunnel wall surface. Not only was it possible to provide a tunnel wall cutting device at a low cost, but it was also possible to expand the use of twin headers that were conventionally used for excavating the ground.

FIG. 1 is a plan view illustrating a cutting method of a cutting wall surface on the right side of a tunnel by a work vehicle, showing an example of a preferred embodiment of the present invention. FIG. 2 is an enlarged longitudinal sectional view of a cutting part shown in FIG. 1. It is an expansion perspective exploded view which shows the attachment method to the casing of the guide roller shown in FIG. It is an enlarged plan view which shows the cutting method of the bottom wall part of the right side of a tunnel. FIG. 3 is an enlarged longitudinal sectional view showing a state after the bottom wall portion is cut by the cutting portion shown in FIG. 2. It is a top view which shows the cutting method of the left wall surface of the tunnel T by a working vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting device, 4 Rotating shaft, 7 Car body part, 8 Arm part, 10 Cutting part, 11 Bracket, 12 Mounting flange, 13 Casing, 14 Cutting drum, 16 Gear, 17 Rotating bearing, 18 Rotating shaft, 19 Rotating frame, 20 Vertical flange, 21 motor, 24 upper sprocket, 25 horizontal shaft, 27 lower sprocket, 28 chain, 29 receiving seat, 30 cutting pick, 40 guide roller, 41 mounting portion, 42 mounting cylinder, 44 cylindrical shaft, 45 rotary bearing, 46 Cylindrical shaft, 47 mounting protrusion

Claims (2)

A casing is extended to the front end side of a mounting flange mounted on a bracket provided at the front end of a undulating arm portion projecting from the work vehicle, and a pair of lateral sides extending in the left-right direction at the front end portion of the casing. Shafts are provided so as to be opposed to each other, and a cutting drum having a cutting pick on the peripheral surface is mounted on the one horizontal shaft, which can be rotated by a power source provided adjacent to the casing, and the other A guide roller having a diameter smaller than that of the cutting drum is detachably mounted on the horizontal axis of the cutting drum. When the bottom wall is cut to a certain depth by the cutting drum, the guide roller is pressed against the existing wall surface. An apparatus for cutting a tunnel wall surface, characterized in that the guide roller serves as a stopper and cutting to the bottom wall portion by the cutting drum is restricted . The cutting depth is determined by the diameter of the cutting drum and the diameter of the guide roller having a predetermined diameter, and the cutting depth is variable by appropriately selecting and using guide rollers having different diameters. Tunnel wall cutting equipment.

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