JPH0765474B2 - Tunnel cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a tunnel cutting device used for repair work of a railway tunnel of a commercial line.

<Problems to be Solved by the Present Invention> Concrete on the inner peripheral surface of a tunnel such as a railway deteriorates and collapses or cracks due to long-term use. Tunnel repair work for placing concrete is required.

However, when repairing tunnels such as railways on business lines, it is necessary to perform repair work within a limited short time from the last train to the first train, so it is difficult to work efficiently and reliably. .

<Object of the Present Invention> The present invention has been made to solve the above problems, and in the case of tunnel repair work, etc., it is possible to quickly, easily, and reliably cut concrete in a tunnel. An object is to provide a cutting device for a tunnel.

<Structure of the Present Invention> An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the tunnel repair work will be described as an example.

<a> Bogie (Fig. 1) The bogie 1 has wheels 11 and is a rail laid in the tunnel.
It is configured so that it can run on 12 roads.

On this trolley 1, rail members 13 having an H-shaped cross section are arranged at intervals.
Are installed in the extension direction of the tunnel.

<B> Slide Plate (FIG. 1) The slide plate 14 is a plate-like member slidably attached to the rail member 13 on the carriage 1 for sliding in the extension direction of the tunnel.

The slide plate 14 may be slid by a hydraulic device or the like.

<C> Turntable (Fig. 1) The turntable 15 is a disk mounted on the slide plate 14 so as to be rotatable by a motor or the like.

On the turntable 15, a plurality of vertical expansion and contraction jacks 16 that can be expanded and contracted vertically are attached.

<D> Boom support pedestal (Fig. 1) The boom support pedestal 2 has a bottom plate 21 attached to the upper ends of the vertical telescopic jacks 16 and a side plate 22 attached at a right angle to the bottom plate 21.
An arch-shaped member 23 is laid across the ends of the side plate 22 and the side plate 22 to form a fan shape.

A rack 24 is formed on the outer peripheral surface of the arch-shaped member 23.

At this time, the distances from the corners 25 formed by the bottom plate 21 and the side plates 22 to the rack 24 are equal to each other.

<E> Boom (Fig. 1) The boom is composed of the base boom 3 and the tip boom 31.

(1) Base end boom The base end boom 3 is a plate-like body whose one end is pivotally supported by the corner portion 25 of the boom support base 2.

A pinion 32 is attached to the base end boom 3 so as to mesh with the rack 24 of the arch-shaped member 23.

[Pinion and Rack] The pinion 32 is rotated by the undulating hydraulic motor 33, and moves on the outer peripheral surface of the arch-shaped member 23 while meshing with the rack 24.

Therefore, the base boom 3 can rotate around the corner 25 in the circumferential direction of the tunnel.

(2) Tip Boom The tip boom 31 is a plate-like body pivotally supported on the free end of the base boom 3.

The boom jack is attached to the tip boom 31 and the base boom 3.
Both ends of 34 are pivotally supported.

The boom jack 34 is hydraulically expanded and contracted so that the distal boom 31 and the proximal boom 3 can be bent.

<F> Drum Case (FIG. 3) The drum case 4 is a box that houses a cutter drum 5 and a disc cutter 6 described later.

A tip boom 31 is pivotally supported near the lower end of the drum case 4, and one end of a pressing arm 41 is pivotally supported near the upper end so as to be horizontally mounted.

The other end of the pressing arm 41 pivotally supports one end of the rotary arm 42, and the other end of the rotary arm 42 pivotally supports the tip boom 31 to form a link mechanism.

One end of a pressing jack 43 is pivotally supported on the connecting portion between the rotary arm 42 and the pressing arm 41, and the other end is pivotally supported on the tip boom 31.

A wire 44 is stretched between both ends of the pressing jack 43, and a stroke detector 45 for detecting the stroke of each jack is installed.

Once the predetermined cutting depth of the concrete 6 is set, the stroke of each jack is confirmed by the stroke detector 45 and used as a guide for setting the position at the next point after the movement.

The stroke of each jack at this time may be digitally displayed.

The drum case 4 has a surface open to the inner peripheral surface of the tunnel, and the rotary shaft 46 is positioned in the drum case 4 in a vertical direction substantially parallel to the inner peripheral surface of the tunnel.

The rotary shaft 46 is rotated by a cutter drum hydraulic motor 47 attached to the end of the drum case 4.

<G> Cutter drum (Figs. 3 and 4) The cutter drum 5 is a cylinder having a plurality of cutting bits 51 on its surface.

The cutter drum 5 is rotatably attached to the rotary shaft 46.

The rotation torque of the cutter drum 5 is variable, and the cutter drum 5 is configured to be rotatable forward and backward.

As the cutting bit 51, one that matches the strength of the concrete 6 is used.

For example, a toe type for scraping concrete 6 and a cutter type for cutting are appropriately arranged on the surface of the cutter drum 5.

Further, the cutting bit 51 is replaceably attached by a bit holder 52.

<Cutting Method by Device of the Present Invention> First, the device of the present invention is placed on the rail 12 laid in the tunnel.

<A> Determination of Cutting Position The turntable 15 is rotated so that the cutting bit 51 of the cutter drum 6 faces the concrete 6 side.

When cutting concrete 6 on the wall of the next line,
Turn the turntable 15 180 degrees.

When setting the height of the cutting place of the tunnel, the vertical expansion / contraction jack 16 is expanded / contracted.

Next, rotate the pinion 32 to move it on the rack 24,
Rotate the base boom 3 in the circumferential direction of the tunnel to set the concrete cutting position.

In this way, since the pinion 32 is moved in engagement with the rack 24, the adjustment can be easily performed as compared with the position setting using a cylinder or the like.

Further, it is possible to reduce vibration of the entire machine that occurs during cutting.

After performing the rough position setting as described above, the boom jack 34 is expanded and contracted, and the tip boom 31 is rotated in the circumferential direction of the tunnel to perform fine adjustment.

Then, finally, the pressing jack 43 is expanded / contracted, the drum case 4 is rotated around the connecting portion with the tip boom 31, and the cutter drum 5 is positioned so as to be substantially parallel to the inner peripheral surface of the tunnel.

<B> Cutting of concrete After the cutting position is determined, the slide plate 14 is moved in the extension direction of the tunnel to cut the concrete 6 into strips.

When cutting, as shown in FIGS. 5 and 6, the concrete 6 is cut alternately on the left and right at a required interval according to the properties of the tunnel, and the concrete is sequentially cut by a spraying machine from the place where the cutting is completed. I will set it.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<A> The device of the present invention can freely determine the cutting position in the tunnel by operating the jack, pinion and rack.

Therefore, if a truck equipped with a cutter drum or the like is installed at a predetermined position, a wide range of concrete can be cut without moving the truck.

Therefore, it is not necessary to move the entire apparatus every time the cutting position is changed, the working time can be shortened, and the work can be performed easily.

As a result, as described above, even in the case where it is necessary to perform the work within a limited short time from the last train to the first train in the repair work of the railway tunnel of the commercial line, it is possible to sufficiently deal with the work.

<B> By rotating the turntable, the concrete on the wall surface of the adjacent line can be cut.

Therefore, it is possible to save the time and effort for moving the truck to the adjacent route.

<C> In the present invention, the pinion is rotated to move on the arch-shaped member while meshing with the rack, and the boom is rotated in the circumferential direction of the tunnel to set the cutting position of concrete.

Therefore, as compared with the setting of the cutting position by the cylinder or the like, the fine adjustment can be easily performed for the position setting by the meshing of the pinion and the rack.

Therefore, it is possible to cut the exact position of the concrete in the tunnel.

<D> The rack attached to the outer peripheral surface of the arch-shaped member and the pinion attached to the boom are surely meshed with each other.

Therefore, vibration of the entire machine that occurs when cutting concrete can be received and mitigated by the arch-shaped member.

[Brief description of drawings]

 FIG. 1: Explanatory diagram of an embodiment of the apparatus of the present invention FIG. 2: Explanatory diagram of pinion and rack FIG. 3: Enlarged diagram of boom tip FIG. 4: Explanatory diagram of cutter drum FIG. 5, 6: Tunnel Illustration of cutting method

Front page continuation (72) Iwamura Iwamura 1-2-1 Okura Setagaya-ku, Tokyo Kinuta Park Himiko Mansion B-312 (56) References JP-A-57-116896 (JP, A) 59722 (JP, U)

Claims (1)

[Claims] 1. A bogie capable of traveling on rails laid in a tunnel, a slide plate slidably mounted on the bogie in an extension direction of the tunnel, and a turntable rotatably mounted on the slide plate. An arch-shaped rack on the turntable, a boom rotatably mounted on the turntable in the circumferential direction of the tunnel, and a rotatable pinion mounted on the boom so that the rack meshes with the boom. A cutting device for a tunnel, which is rotatably supported at the free end of the tunnel, has a rotary shaft positioned substantially parallel to the inner peripheral surface of the tunnel, and comprises a cutter drum capable of cutting in the extension direction of the tunnel.