JP3533257B2 - Tunnel excavator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator, and more particularly, to a main beam, a main gripper fixed to a rear portion of the main beam, and a front side of the main beam with respect to the main beam. The present invention relates to a tunnel excavator that is slidably supported and has a main frame that supports a cutter head on the front side.

[0002]

2. Description of the Related Art Conventionally, a tunnel excavator as disclosed in, for example, Japanese Unexamined Patent Publication No. 6-42285 is used for expanding a pre-excavated small-diameter pilot pit to form a reaming pit. . In the tunnel excavator described in this publication, a cutter head support is supported by a main beam supported by a reaming pit wall and a pilot pit wall so as to be slidable back and forth, and the cutter head is propelled forward by the cutter head support and expanded. Diameter excavation is performed.

[0003]

However, since such a tunnel excavator is an open type, the excavated earth and sand are often dropped on the exposed portion of the main beam, and the main beam and the cutter head support are slid. There is a problem that sand, dust, etc. enter the moving part, and as a result, the exposed part of the main beam is damaged, and the sliding part is worn or galled.

The present invention has been made to solve such problems, and it is a tunnel capable of protecting the exposed portion of the main beam and preventing sand, dust, etc. from entering the sliding portion. The purpose is to provide an excavator.

[0005]

In order to achieve the above-mentioned object, the tunnel excavator according to the present invention comprises, firstly, a main beam and a main beam fixed to a rear portion of the main beam. and the gripper, in the main beam tunnel boring machine comprising a main frame supporting the cutter head in the front side while being slidably supported with respect to the main frame to the outer periphery of the sliding portion of the main frame It is characterized in that a bellows is provided between the rear end portion and the main gripper so as to cover the main beam over the entire circumference and to expand and contract in the sliding direction.

According to the tunnel excavator of the present invention having the first feature, the exposed portion of the main beam between the rear end of the sliding portion of the main frame and the main gripper expands and contracts in the sliding direction. Since it is covered by the flexible bellows, the exposed portion of the main frame does not directly collide with the earth and sand and the main frame is not damaged. In addition, since the presence of the bellows prevents dust, sand and the like from entering the sliding portion between the main frame and the main beam, there is no problem such as galling.

The tunnel excavator according to the present invention is, secondly,
A main beam, a main gripper fixed to the rear portion of the main beam, and a main frame supporting the cutter head in the front side while being slidably supported with respect to the main frame to the outer periphery of the main beam In the tunnel excavator provided, a scraper that comes into contact with the sliding surface of the main beam is provided at the rear end and / or the front end of the sliding portion of the main frame.

According to the tunnel excavator of the present invention having the second feature, when the sliding surface of the main beam makes a sliding motion of the main frame, the sliding portion rear end portion of the main frame and / or Or because it is swept away by a scraper provided at the front end, dust, sand, etc. are prevented from entering between the sliding part of the main frame and the sliding part of the main beam, and no abrasion or galling occurs. .

Thirdly, the tunnel excavator according to the present invention comprises:
A main beam, a main gripper fixed to the rear portion of the main beam, and a main frame supporting the cutter head in the front side while being slidably supported with respect to the main frame to the outer periphery of the main beam In a tunnel excavator provided with the main frame, the main beam is covered between the rear end of the sliding portion of the main frame and the main gripper from above, and a stretchable seat is suspended in the sliding direction. It is a thing.

According to the tunnel excavator of the present invention having the third feature, since the seat which is stretchable in the sliding direction is suspended above the exposed portion of the main frame, even if the earth and sand fall from above. By being protected by the sheet, earth and sand do not collide with the exposed portion of the main frame and the main frame is not damaged.

Objects of the present invention will become apparent from the detailed description given below. However, while the detailed description and specific examples describe the most preferred embodiments, various modifications and variations within the product and scope of the invention will be apparent to those skilled in the art from the detailed description, and It will be described as an example.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the tunnel excavator according to the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a tunnel excavator according to an embodiment of the present invention. The tunnel excavator 1 according to the present embodiment is used, for example, for excavating an inclined shaft for water conveyance in a power plant, and after excavating an inclined pilot shaft 2 in advance with the pilot shaft tunnel excavator, It is an inclined shaft reaming excavator that expands the rock mass on the outer peripheral side of the pilot mine 2 into a reaming mine.

In this tunnel excavator 1, a main beam 4 having a cylindrical cross section at the front part and a rectangular tube cross section at the rear part is extended over the pilot pit 2 and the reaming pit 3,
The main frame 5 is slidable back and forth on the main beam 4.
Is supported. A cutter head 7 is rotatably supported on the main frame 5 via a cutter head support 6, and a large number of roller cutters 8 are attached to the front end of the cutter head 7. A main gripper 9 is arranged behind the main frame 5. The main gripper 9 includes a carrier 10 in which the rear portion of the rectangular cross section of the main beam 4 penetrates and is fixed, a gripper jack 11 supported by the carrier 10, and a gripper pin-supported by the tip of the gripper jack 11. And a shoe 12. A nose gripper 14 having a gripper shoe 13 attached to the tip of the gripper jack is fixed to the tip of the main beam 4.

A partially enlarged sectional view of the tunnel excavator 1 shown in FIG. 1 is shown in FIG. A sectional view taken along the line AA of FIG. 2 is shown in FIG. 3, and a schematic sectional view of the circle indicated by the symbol S in FIG. 2 is shown in FIG. As shown,
A slide plate 20 (movable side) provided on the main frame 5 side and a slide plate 21 (fixed side) provided on the main beam 4 side are provided so as to make surface contact. As shown in FIG. 3, two slide plates 20 and two slide plates 21 are provided on each surface of the main beam 4, for a total of eight slide plates.
In such a configuration, the tip of the main beam 4 is supported by the nose gripper 14 against the inner peripheral surface of the pilot pit 2, and the rear portion of the main beam 4 is supported by the main gripper 9 inside the reaming pit 3. The slide plate 2 is supported against a surface (see FIG. 1).
By sliding 0 on the slide plate 21, the main frame 5 supporting the cutter head 7 via the cutter head support 6 can move along the main beam 4.

As shown in FIGS. 2 and 4, a support plate 22 is erected at the rear end of the slide plate 20, and the support plate 22 is folded to the carrier 10 (main gripper 9). A tatami-mat seat 23 is suspended. As shown in FIG. 5, the folding sheet 23 has a plurality of round bars 25 attached to a sheet material 24 in parallel at regular intervals, and the sheet material 24 is placed at an intermediate position between the round bars 25.
Is folded downwards. Further, rings 26, 26 are provided at both ends of each round bar 25,
Each of these rings 26, 26 has a wire 27,
27 is passed through, and the folding sheet 23 is supported by the wires 27, 27. One end of each of the wires 27, 27 is attached to the upper end of the support plate 22, and the other end is attached to a position higher than the upper end of the support plate 22 of the carrier 10 as shown in FIG. Hook 2
It is attached to 8, 28. Both ends 29, 29 of the sheet material 24 are edged with rubber. Further, although the foldable sheet 23 is shown in a folded state in FIG. 2, it is stretched as necessary.

By suspending the folding sheet 23 above the slide plate 21 on the main beam 4 side, even if the earth and sand excavated from above the tunnel excavator 1 of this embodiment falls, The slide plate 21 is protected from sediment.

In this embodiment, as shown in FIGS. 2 and 4, the main beam 4 is provided between the rear end of the slide plate 20 and the carrier 10 (main gripper 9). And a bellows 30 that is expandable and contractible in the sliding direction of the slide plate 20 is provided. Main beam 4
By covering the exposed portion of the slide plate 21 provided on the side with the bellows 30, it is possible to protect the exposed portion of the slide plate 21 from the earth and sand falling during excavation and the like. It is possible to prevent dust, sand, etc. from entering the sliding portion with the slide plate 20.

Furthermore, in this embodiment, as shown in FIG. 4, the slide plate 20 is attached
A scraper 40 that is in contact with the sliding surface of the slide plate 21 provided on the main beam 4 side is attached to the rear end of the main frame 5 . The scraper 40 is a blade-shaped member having the same width as that of the slide plate 20 (see FIG. 3) and having a pointed tip portion in contact with the slide plate 21. Since eight slide plates 20 are provided, eight scrapers 40 are also provided. These scrapers 40 are preferably made of rubber. Such a scraper 40
By providing the above, even if dust, sand, etc. fall on the slide plate 21, the dust, sand, etc. can be swept away by the tip portion of these scrapers 40.
The sliding surface between the slide plate 20 and the slide plate 21 is free from problems such as wear and galling.

Although the scraper 40 is provided at the rear end of the slide plate 20 in this embodiment, it may be provided at the front end. Alternatively, it may be provided at both the front end and the rear end.

Further, although the tunnel excavator 1 of this embodiment is provided with the folding seat 23, the bellows 30 and the scraper 40, they may be provided individually, or two types may be combined as required. It goes without saying that you can do it.

As mentioned above, it is obvious that the present invention can be variously modified. Such modifications are within the spirit and scope of the invention, and all such variations and modifications apparent to those skilled in the art are intended to be within the scope of the following claims.

[Brief description of drawings]

FIG. 1 is a perspective view showing a tunnel excavator of this embodiment.

FIG. 2 is a partially enlarged sectional view of the tunnel excavator of this embodiment.

3 is a sectional view taken along line AA of FIG.

4 is a schematic cross-sectional view of a circle S in FIG.

FIG. 5 is a perspective view of a foldable seat.

[Explanation of symbols]

1 tunnel excavator 2 pilot pits 3 reaming mines 4 main beam 5 mainframe 7 cutter head 9 Main gripper 10 careers 14 Nose gripper 20 Slide plate (movable side) 21 Slide plate (fixed side) 23 Foldable seat 30 bellows 40 scraper

Front page continued (72) Inventor Yujiro Shibukawa 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka City Okumura Gumi Co., Ltd. (72) Inventor Tsutomu Mizobata 2--2 Matsuzaki-cho, Abeno-ku Osaka City Okumura Gumi Co., Ltd. (72) Inventor Shinichi Terada 3-1-1, Ueno, Hirakata-shi, Osaka, Komatsu Ltd. Osaka factory (72) Inventor, Yoshito Minami 3-1-1, Ueno, Hirakata-shi, Osaka, Komatsu Ltd., Osaka factory (72) ) Inventor Toshihiro Yamazaki 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka factory (56) References JP-A-5-187191 (JP, A) JP-A-5-321579 (JP, A) Publication 47-24803 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/08 E21D 9/00 E21D 9/06 E21D 9/10

Claims (3)

(57) [Claims] 1. A main beam, and a main gripper fixed to the rear portion of the main beam, the cutter head in the front side while being slidably supported with respect to the main frame to the outer periphery of the main beam support In a tunnel excavator including a main frame, a bellows is provided between a rear end of a sliding portion of the main frame and the main gripper so as to cover the main beam over the entire circumference and expand and contract in the sliding direction. A tunnel excavator characterized by that. 2. A main beam, and a main gripper fixed to the rear portion of the main beam, the cutter head in the front side while being slidably supported with respect to the main frame to the outer periphery of the main beam support In the tunnel excavator including a main frame, a scraper that comes into contact with a sliding surface of the main beam is provided at a rear end portion and / or a front end portion of the sliding portion of the main frame. . 3. A main beam, and a main gripper fixed to the rear portion of the main beam, the cutter head in the front side while being slidably supported with respect to the main frame to the outer periphery of the main beam support In a tunnel excavator including a main frame, the main beam is covered between the rear end of the sliding portion of the main frame and the main gripper from above, and a stretchable seat is suspended in the sliding direction. A tunnel excavator characterized by that.