JP2000064204A - Drawing structure of rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly draw a rail in a short time by arranging two standard length rails of standardized products in parallel, installing a drawing rail at the inside of the standard length rail along each standard length rail and constituting the standard length rails and the drawing rail so as to be slidable each other. SOLUTION: In a state that a drawing rail 3 is not drawn, a bogie is moved in a state that wheels and the flanges are taken on treads 11, 31 of each standard length rail 1 and a drawing rail 3. When a facing is advanced and drawn, only the drawing rail 3 releases a bolt connection with a crosstie 4 and the drawing rail 3 is towed to the facing side of a tunnel by using a chain block. As a result, the drawing rail 3 is drawn to the facing side by a required distance, no matter how halfway the distance is. As a result, the bogie supplying a segment to the facing can be sufficiently approached to an elector and an assembling work of the segment can be quickly completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for extending a rail.

[0002]

2. Description of the Related Art In a shield tunnel, as shown in FIG. 4, immediately after excavating the ground by a shield excavator a, a segment b is used to cover the inner surface of the tunnel and advance.
For that purpose, the carriage of the segment b must be brought to just under the erector c for segment assembly. Alternatively, equipment such as a conveyor for discharging the excavated earth and sand must be arranged close to each other in accordance with the forward movement of the excavator a. From such a requirement, the tip of the rail d for moving the carriage needs to be extended in small steps in accordance with the excavation of the shield machine a. However, a typical commercially available rail d has a length of, for example, 5 in accordance with the JIS standard.
It is fixed at about 6m. Therefore, it is difficult to extend the rail d according to the advance of the excavator a little by little.

[0003]

Therefore, conventionally,
Until the excavator moved forward enough to secure the length of the standard length rail, the method of suspending the extension or the method of repeatedly connecting the short rails cut from the standard length rail and extending it was adopted. . <a> However, in the former method, the truck for supplying the segment and other trucks cannot sufficiently approach the erector and the face, so that the segment assembly work requires time and labor. <B> The latter method is uneconomical because it often requires connecting short rails, and when a certain length is reached, the short rail group must be removed and replaced with a regular rail. <C> In particular, in the curved portion of the rail, since the dimensional difference between the inner and outer rails occurs, the adjustment work is duplicated and the efficiency is further inferior. <D> The above problems have been described by taking a shield tunnel as an example, but the same applies to a general tunnel.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a rail extending structure capable of smoothly extending a rail in a short time.

[0005]

In order to achieve the above-mentioned object, the rail extending structure of the present invention is such that two standard length rails are arranged in parallel and the rails extend along each rail. ,
An extension rail is installed inside it, and the extension rails on both sides are connected by a connecting member in the transverse direction, which is orthogonal to the extension direction of the rail, and the standard length rail and the extension rail are configured to be slidable mutually. It is characterized by the extended structure of the rail.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a rail extending structure of the present invention will be described in detail below with reference to the drawings.

<A> Arrangement of standard rails. Except for the position close to the face, two standard length rails 1 are arranged in parallel. The structure of this standard rail 1 part is
This is a rail structure that has been conventionally used in normal tunnel construction, and the arrangement of sleepers and the connection between the sleepers and the rails are well-known structures, and therefore need not be described. When the truck is run, the wheels 2 of the truck are mounted on the tread 11 of the standard length rail 1 to move the truck.

<B> Installation of extension rails. The extension rails 3 are installed along each of the standard length rails 1. The installation position of the extension rail 3 is inside each of the two standard length rails 1. The extension rail 3 is a long steel material having a substantially rectangular cross section, and the upper surface of the extension rail 3 is configured as a tread surface 31 of the flange portion 21 of the wheel 2. Therefore, the difference between the height of the tread 11 of the standard length rail 1 and the height of the tread 31 of the extension rail 3 is set to be the same as the height difference between the wheel 2 and the flange 21 when the two are installed in combination. . Furthermore, inside the tread surface 31 of this extension rail 3 in the longitudinal direction,
A wall plate 32 that is higher than the tread surface 31 is formed. This wall board 32
The wall surface of the flange 21 can prevent the flange 21 from being removed. On the other hand, a part of the lower surface of the extending rail 3 is formed at the same angle as the forming angle of the bottom plate 12 of the standard length rail 1 to form a riding surface on the standard length rail 1. The extension rail 3 is fixed to a sleeper 4 arranged in the transverse direction of the tunnel. As for the fixing method, for example, as shown in FIG. 2, a part of the sleeper 4 is sandwiched via a plate and fixed by bolting. As a result, a part of the riding surface of the extension rail 3 is fixed in a state of riding on the bottom plate 12 of the standard length rail 1.

<C> Connection between the extending rails. Extending rails 3 on both sides installed inside each standard length rail 1.
The spaces are connected by a transverse connecting member 33 which is orthogonal to the extension direction of the rail. As the connecting member 33, a long steel plate, a steel rod, or the like is welded and fixed to the side surface of the drawing rail 3. Therefore, the extending rails 3 on both sides are formed into a ladder-like planar state by the connecting members 33.

<D> Cutting of the drawing rail. The two extending rails 3 arranged in parallel in a ladder shape are cut at regular intervals at substantially the same position on both sides. The cutting surface 34 is formed on a plane having an angle orthogonal to the extension direction of the rail or an intersecting angle, or an arc-shaped surface. Then, from one cut surface 34 to the next cut surface 34
At least two tie members 33 are positioned in one section up to. In this way, by connecting the extended rails 3 on both sides after cutting with the two connecting members 33, it is possible to form a frame body having a cross-shaped planar shape.

<E> Connection of extension rails. As it is, the stretch rails 3 in one section are still formed in a cross beam shape and cannot be extended. Therefore, a link 35 that is rotatable via a pin 36 between the connecting member 33 of the extending rail 3 in one section and the connecting member 33 in the adjacent section.
Connected with to form a long ladder. By providing a slight margin between the link 35 and the pin 36, the connecting members 33 in the adjacent sections can move and rotate with respect to each other. As a result, it is possible to freely change the central axis between one section of the extension rail 3 having the cross beam shape and the section of the extension rail 3 adjacent thereto. Further, it is possible to cope with the meandering of the shield tunnel in the vertical direction.

<F> Pulling out from the standard rail. The ladder-shaped extending rails 3 thus formed are installed between the fixed-length rails 1 on both sides. Therefore, when the extension rail is not pulled out, the wheel 2 and its flange 21 are
And treads 11 and 3 of the standard length rail 1 and the extension rail 3, respectively.
The dolly moves while riding 1. When the face advances and extends, only the extension rail 3 releases the bolt connection with the sleeper 4, and the extension rail 3 is pulled toward the face of the tunnel using a chain block or the like. Then the extension rail 3
Since the standard length rail 1 and the standard length rail 1 are slidable with respect to each other, the required distance can be extended to the face even if the distance is halfway. After the stretching, the bolts are fixed from below via the sleepers 4 arranged in the transverse direction.

<G> Movement of the carriage. For segment trucks, etc.
Moves over the tread 11 of the standard length rail 1. When reaching the extension rail 3, on the tread surface 31 of the extension rail 3,
The flange 21 of the wheel 2 rides on and can be moved to the tip of the extension rail 3 as it is. Therefore, the bogie can be advanced to a free position in accordance with the gradual advance of the shield machine or the irregular advance of the face.

<H> Refilling to standard rails. When the drawn rail 3 thus drawn out reaches the standard size of the commercial rail, the fixed-length rails 1 are arranged on both sides of the drawn rail 3 and firmly fixed to the sleeper 4. Therefore, the fixed-length rail 1 is laid with the extended rail 3 held inside, and the extended rail 3 is laid again by a free dimension as needed.
Can be pulled out.

[0015]

The structure of the stretched rail of the present invention is as described above, so that the following effects can be obtained. <B> It is possible to bring the cart that supplies the segment to the face sufficiently close to the erector. Therefore, in the case of a shield tunnel, the segment assembly work can be completed quickly regardless of the position of the shield machine. <B> It is possible to perform economical extension work without the complicated work of connecting short rails frequently as in the past and removing the short rail group and switching to the standard length rail when reaching a certain length. . <C> Further, even in the curved portion of the rail, the angle of the stretched rail can be freely changed in the middle, so that it is possible to lay smoothly in a curved line. The change of the angle is not limited to the change on the horizontal plane, and it is possible to follow the meandering in the vertical direction, that is, the meandering in the vertical direction. <D> Not only in shield tunnels, but also in ordinary tunnels or propulsion methods, it is possible to stretch to any position even with halfway dimensions in accordance with the small advance of the face or the irregular advance of the face. It is possible to freely move forward the trolley and other equipment mounted on the rail.

[Brief description of drawings]

FIG. 1 is an explanatory view of an example of a rail extending structure of the present invention.

FIG. 2 is an explanatory view of a combined state of a standard length rail and an extension rail.

FIG. 3 is an explanatory view of an example of a cut portion of a stretch rail.

FIG. 4 is an explanatory diagram of an embodiment of a general shield machine.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Miwaji             11-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harimaju             Industrial Co., Ltd. Aichi factory (72) Inventor Hiroaki Tomimatsu             11-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harimaju             Industrial Co., Ltd. Aichi factory F-term (reference) 2D054 DA17

Claims (3)

[Claims] 1. Two standard length rails are arranged in parallel, and an extension rail is installed inside each of the length rails, and the extension rails on both sides are perpendicular to the rail extension direction. ,
A rail extension structure that is connected by a transverse tie and is configured so that the standard length rail and the extension rail can slide relative to each other. 2. The extending rails are cut at regular intervals, and a connecting member for connecting the extending rails on both sides is positioned between one cutting position and the next cutting position to connect the extending rails. The extended structure of the rail according to claim 1, wherein the members and the connecting members in the adjacent sections are connected by a rotatable link. 3. The extending rail is cut at regular intervals, the cutting surface is set at an angle intersecting with the extension direction of the rail, and both sides are provided between one cutting position and the next cutting position. 2. The rail extending structure according to claim 1, wherein a connecting member for connecting the extending rails is positioned, and a connecting member for one section and a connecting member for an adjacent section are connected by a rotatable link.