JPH0765475B2 - 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 repairing a railway tunnel for a commercial line.

<Problems to be Solved by the Present Invention> The concrete on the inner 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. .

<Purpose of the present invention> The present invention has been made to solve the above problems, and in the case of tunnel repair work, etc., the concrete of the tunnel can be cut quickly, easily, and reliably. 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 inside 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 so that it can slide 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 disc 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 is constructed by attaching side plates 22 at right angles to the edges of the bottom plate 21 attached to the upper ends of the vertical telescopic jacks 16.
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.

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 engaging 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. 2) The drum case 4 is a box for housing a cutter drum 5 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 arm 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.

It should be noted that the nozzle 53 as shown in FIG. 4 is provided in the drum case 4, and water can be sprayed at the time of cutting the concrete 6 to reduce the generation of dust and obtain the cooling effect of the cutting bit 51.

<G> Cutter drum (FIGS. 2 and 3) The cutter drum 5 is a cylinder having a plurality of cutting bits 51 on the 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.

<H> Jet Nozzle (FIGS. 1 and 4) The jet nozzle 7 is connected to a known air jet device and is provided on the tip boom 31 toward the tip of the tip boom 31.

Air is sprayed from the spray nozzle 7 to form an air curtain 71 in order to prevent dust from scattering around during cutting.

Therefore, it is desirable to provide a plurality around the tip boom 31.

<I> Suction blower (Figs. 1 and 4) The suction blower 72 is a device for sucking dust trapped in the air curtain 71.

This suction blower 72 has a tip boom rather than the injection nozzle 7.
It is provided on the tip side of 31, and a known device can be used.

Then, the sucked dust is removed to the dust collector 74 through the flexible duct 73.

<Nut> Chute (FIGS. 1 and 5) The chute 8 is a box body pivotally supported on the inner peripheral surface side of the tunnel of the bottom plate 21 of the boom support base 2.

The chute 8 is configured to be foldable on the way.

At the time of cutting, the chute 8 is positioned upward so as to receive the suspended debris of the concrete 6, and then it is lowered to transfer the suspended debris to the conveyor 9 described later.

Further, since it is configured to be foldable, it does not hinder the work even in a narrow space inside the tunnel.

<Le> Conveyor (FIGS. 1 and 5) The conveyor 9 is configured to be mounted and mounted on a rotating plate 91 that is axially supported along the inner peripheral surface of the tunnel of the truck 1.

The conveyor 9 can receive the scraps from the chute 8 and can remove the scraps from the scraps-only cart or the like.

<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.

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.

At this time, air is jetted from the jet nozzle 7 to trap the dust produced by cutting the concrete 6 in the air curtain 71.

Then, the suction blower 72 removes the dust into the dust collector 74.

When cutting, as shown in FIGS. 6 and 7, the concrete 6 is cut alternately 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.

<C> Elimination of chipping scraps The chipping scraps of the cut concrete 6 are received by the chute 8 and transferred to the conveyor 9 to be removed from the conveyor 9 to another place.

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

<B> The apparatus 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 route can be cut.

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

<C> According to the present invention, the folding chute can be received by the foldable chute, and can be removed to another place by the conveyor provided along the side surface of the truck on the inner peripheral surface side of the tunnel.

Therefore, the hanging scrap does not cover the device, and the workability is improved.

<D> The chute and the conveyor are both foldable.

Therefore, even if the distance between the cutting device and the inner peripheral surface of the tunnel is narrow, it does not hinder the cutting, or it is possible to surely perform the work of removing the hanging debris.

<E> Air can be jetted to prevent dust at the time of cutting from scattering by the air curtain, and the dust can be sucked by a suction blower.

Therefore, it is possible to improve the processing capability of dust that causes pneumoconiosis.

<F> By adopting an air curtain, dust does not scatter around, so the cutting situation can be visually confirmed.

Therefore, the cutting work can be performed reliably and easily.

[Brief description of drawings]

 FIG. 1: Illustration of an embodiment of the device of the present invention FIG. 2: Enlarged view of the tip of the boom FIG. 3: Illustration of the cutter drum FIG. 4: Illustration of the state in which air is jetted FIG. 5: Hatsuri Explanatory diagram of the state of eliminating rattle Fig. 6 and 7: Explanatory diagram of tunnel excavation method

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Iwamura Iwamura 1-2-1 Okura, Setagaya-ku, Tokyo Kinuta Park Himiko Mansion B-312 (56) Reference JP-A-57-116896 (JP, A) 54-59722 (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. A boom mounted on the turntable so that it can rotate in the circumferential direction of the tunnel, and a rotating shaft that is pivotally supported by the free end of the boom and is located substantially parallel to the inner surface of the tunnel. A cutter drum that can be cut and a shaft supported on the inner surface of the tunnel above the turntable.
A foldable chute, a stowable conveyor installed along the side of the bogie on the inner surface of the tunnel, an air injection nozzle on the boom facing the tip of the boom, and a boom Tunnel cutting device consisting of a suction blower installed on the tip side