JP2014134025A - Apparatus for constructing tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for constructing a tunnel, capable of smoothly performing various works in the tunnel.SOLUTION: In an apparatus for constructing a tunnel 1, an erector mechanism 10 and a basket mechanism 20 are movable in a longitudinal direction with respect to a travelling base 2. Lower stage rail members 40 extending in the longitudinal direction are installed on both sides of the travelling base 2, respectively. Base bodies 60 for an erector are attached to the lower stage rail members 40, respectively, and the base bodies 60 for the erector are movable along the lower stage rail members 40, and the erector mechanism 10 is supported by the base bodies 60 for the erector. On the other hand, upper stage rail members 50 extending in the longitudinal direction are installed above the lower stage rail members 40, respectively, base bodies 70 for the basket are attached to the upper stage rail members 50, respectively, the base bodies 70 for the basket are movable along the upper stage rail members 50, and thus the basket mechanism 20 is supported by the base bodies 70 for the basket.

Description

  The present invention relates to an apparatus for tunnel construction in which an erector mechanism, a basket mechanism, and a spray mechanism are incorporated in a traveling base.

  Conventionally, there has been an apparatus shown in Patent Document 1 as a tunnel construction apparatus for performing various operations such as erection of a support work and concrete spraying in a tunnel. As shown in (1) of FIG. 15, this tunnel construction device has a configuration in which an erector mechanism 101, a basket mechanism 102, and a spraying mechanism 103 are incorporated in a traveling base 110. Therefore, when this apparatus 100 is used, it is not necessary to frequently enter and exit the construction vehicle or the like in the tunnel, and the construction can proceed smoothly.

  In addition, the tunnel construction apparatus 100 includes a base body 104 that can move back and forth with respect to the traveling base 110, and the base body 104 supports various mechanisms 101, 102, and 103. Therefore, according to the present apparatus 100, the various mechanisms 101, 102, 103 can be moved back and forth in accordance with the situation such as traveling and working, and the construction can be carried out more smoothly. In addition, (1) of FIG. 15 shows the state which moved various mechanisms 101,102,103 to the back side. This is usually the case when traveling. On the other hand, (2) of FIG. 15 shows a state in which the various mechanisms 101, 102, 103 are moved forward. When working, this state is set as necessary.

As described above, the conventional tunnel construction device 100 has a great advantage, but there is room for improvement in the following points.
That is, according to the apparatus 100, the forward and backward movements of the various mechanisms 101, 102, 103 are interlocked. Therefore, for example, when the support work using the erector mechanism 101 is built, the basket mechanism 102 becomes an obstacle, and the smoothness of the building work may be impaired. Further, since the base body 104 and the various mechanisms 101, 102, 103 supported by the base body 104 are incorporated in the center portion in the width direction (direction orthogonal to the front-rear direction), the space on the traveling base 110 is effectively used. I can't.

JP 7-217392 A

  The main problem to be solved by the present invention is to provide a tunnel construction device capable of smoothly performing various operations in a tunnel.

The present invention for solving this problem is as follows.
[Invention of Claim 1]
Elector mechanism, basket mechanism and spray mechanism are built into the traveling base,
At least the erector mechanism and the basket mechanism are tunnel construction devices that are movable back and forth with respect to the traveling base,
Lower rail members extending in the front-rear direction are provided on both sides of the traveling base,
An erector base body is attached to the lower rail material, the erector base body is movable along the lower rail material, and the erector mechanism is supported by the erector base body,
An upper rail member extending in the front-rear direction is provided above at least one of the pair of lower rail members,
A basket base body is attached to the upper rail material, the basket base body is movable along the upper rail material, and the basket mechanism is supported by the basket base body.
Tunnel construction equipment characterized by that.

(Main effects)
An erector base body is attached to the lower rail material, the erector base body can be moved along the lower rail material, an erector mechanism is supported by the erector base body, and a basket base body is mounted on the upper rail material. When the basket base body is attached and is movable along the upper rail member, and the basket mechanism is supported by the basket base body, the erector mechanism and the basket mechanism can be moved back and forth separately. Therefore, for example, it is possible to prevent the basket mechanism from becoming an obstacle when a support work using the erector mechanism is built, and various operations in the tunnel can be performed smoothly.

  In addition, a lower rail material extending in the front-rear direction is provided on both sides of the traveling base, and an upper rail material extending in the front-rear direction is provided above at least one of the pair of lower rail materials. If so, the space on the traveling base can be effectively used as a work space, an installation space for various facilities, or the like.

[Invention of Claim 2]
The base body for the erector has a support portion located on the outer side in the width direction of the lower rail material,
The lower end portion of the support portion is located below the upper end edge of the lower rail material,
The erector mechanism is attached to the front surface of the support portion including the front surface of the lower end,
The tunnel construction device according to claim 1.

(Main effects)
When the base body for the erector has a support portion located outward in the width direction of the lower rail material, and the lower end portion of the support portion is positioned below the upper edge of the lower rail material, the erector mechanism is disposed on the front surface of the support portion. In the case of attachment, the front surface of the lower end can be used. Therefore, the height of the base body for electors can be made low and a lower rail material can be provided in a low position. As a result, the height of the entire tunnel construction device can be reduced.

[Invention of Claim 3]
The lower rail material has an upper piece,
A mounting portion in which the base body for the erector is located above the upper piece and integrated with the support portion; and an extending portion that extends from the mounting portion to a position below the upper piece. Have
As a moving mechanism of the base body for the erector, a front sprocket and a rear sprocket provided on the side of the lower rail material, and a chain member laid around the front sprocket and the rear sprocket are provided,
One end of the chain material is attached to the front end of the extension, and after the front sprocket and the rear sprocket are routed, the other end is attached to the rear end of the extension.
The base body for the erector is configured to move back and forth by the rotation of the chain material.
The apparatus for tunnel construction according to claim 2.

(Main effects)
The lower rail member has an upper piece, the erector base body is located above the upper piece, and a mounting portion integrated with the support portion, and an extension extending from the mounting portion to below the upper piece. As a moving mechanism of the base body for the erector, there are a front sprocket and a rear sprocket provided on the side of the lower rail material, and a chain material laid around the front sprocket and the rear sprocket. The chain member is provided with one end portion attached to the front end portion of the extension portion, and after the front sprocket and the rear sprocket are routed around, the other end portion is attached to the rear end portion of the extension portion. If the base body for the erector is moved back and forth by the rotation of the material, the moving mechanism of the base body for the erector can be accommodated within the range of the lower rail material in the vertical direction. It is possible to reduce the height of the entire Le construction equipment.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes an apparatus for tunnel construction which can perform various operations in a tunnel smoothly.

It is a front view of the apparatus for tunnel construction at the time of driving | running | working. It is a top view of the apparatus for tunnel construction at the time of driving | running | working. It is a rear view (main part) of the apparatus for tunnel construction at the time of driving | running | working. It is a front view (main part) of the apparatus for tunnel construction at the time of construction of a support work. It is a top view (main part) of the apparatus for tunnel construction at the time of construction of a support work. It is a rear view (main part) of the apparatus for tunnel construction at the time of construction of a support work. It is a front view (main part) of the apparatus for tunnel construction at the time of spraying of concrete. It is a top view (main part) of the apparatus for tunnel construction at the time of spraying of concrete. It is a rear view (main part) of the apparatus for tunnel construction at the time of spraying of concrete. It is a figure which shows the relationship between the base body which moves back and forth, and a rail material. It is an enlarged view of A part of FIG. It is a front view which shows the moving mechanism of the base body for erectors. It is a top view which shows the moving mechanism of the base body for erectors. It is AA sectional view taken on the line of FIG. It is a schematic diagram of the conventional apparatus for tunnel construction.

Next, the form for implementing this invention is demonstrated.
As shown in FIGS. 1 to 3, the tunnel construction device 1 of this embodiment includes a traveling base (base machine) 2 that travels on the tunnel floor surface B. The traveling base 2 can travel on the tunnel floor B or the like by a pair of crawlers 3 provided on both sides. The traveling base 2 may be capable of traveling with, for example, tires instead of the crawler 3.

  The traveling base 2 includes two erector mechanisms 10, two basket mechanisms 20, and one sprayer 30. Although not particularly illustrated, in addition to the above, for example, a drilling mechanism or the like may be incorporated in the traveling base 2. Moreover, although the basket mechanism 20 may be only one machine, it is preferable that two machines are incorporated like this form from a viewpoint of work efficiency.

  As shown in FIGS. 10 and 11, a lower rail member 40 and an upper rail member 50 are respectively provided on both sides of the traveling base 2. The lower rail member 40 and the upper rail member 50 are elongated and extend in the front-rear direction, that is, in the traveling direction of the traveling base 2. According to this embodiment, the space on the traveling base 2 can be effectively used as a work space, an installation space for various facilities, or the like. In the illustrated example, a driver's seat 5, a compressor 6, and the like are installed in a space on the traveling base 2.

  In this embodiment, the upper rail member 50 is provided above the pair of lower rail members 40, respectively. However, when the basket mechanism 20 is a single machine, the upper rail member 50 can be provided only above one of the pair of lower rail members 40.

  The lower rail member 40 and the upper rail member 50 can be made of, for example, H-shaped steel, I-shaped steel, T-shaped steel, angle steel, flat steel, groove-shaped steel, Z-shaped steel, or the like. However, in this embodiment, the lower rail member 40 is made of I-shaped steel, and the upper rail member 50 is made of a pair of channel steels. Details of this point will be described below.

  An erector base body 60 is attached to the lower rail member 40. The erector base body 60 is a member that supports the erector mechanism 10. The erector base body 60 is movable back and forth along the lower rail member 40. In this embodiment, the mounting structure and the moving structure for the lower rail member 40 of the base body 60 for the elector are as follows.

  First, as shown in FIG. 11, the lower rail member 40 is made of I-shaped steel. More specifically, the lower rail member 40 includes an upper flange 41 that is an upper piece, a lower flange 42 that is a lower piece, and a web 43 that connects both flanges 41 and 42. The upper flange 41 and the lower flange 42 are in the form of a flat plate having a horizontal direction as a width direction. On the other hand, the web 43 is in the form of a flat plate having the vertical direction as the width direction. Both end portions in the width direction of the web 43 are connected to the center portions in the width direction of the upper flange 41 and the lower flange 42.

  On the other hand, the base body 60 for erectors has the support part 61 located in the width direction outer side of the lower rail material 40, as shown in FIG. The support portion 61 has a substantially cubic shape. However, as shown in FIG. 1, the front end portion of the support portion 61 is provided with a protrusion 61 a that protrudes downward. This protrusion 61 a constitutes the lower end portion of the support portion 61. Further, the protrusion 61 a is located below the upper flange 41 that constitutes the upper edge of the lower rail member 40. The front surface 61x of the support portion 61 including the front surface of the protrusion 61a is a vertical surface. The erector mechanism 10 is supported on the vertical surface (front surface) 61x. According to this embodiment, the front surface 61 x of the support portion 61 that is the support surface of the erector mechanism 10 extends to a position lower than the upper end edge of the lower rail member 40. Therefore, the upper end edge of the erector base body 60 can be kept at a low position, and the upper rail member 50 can be arranged at a low position. As a result, the overall height of the tunnel construction device 1 can be reduced.

  In addition to the support portion 61, the erector base body 60 includes a placement portion 62 positioned above the upper flange 41. The placement portion 62 is also substantially cubic and is adjacent to the support portion 61. The support part 61 and the mounting part 62 are integrated, for example, by connecting side surfaces to each other. As shown in FIG. 11, an upper wheel 64 that rolls on the upper flange 41 is built in the mounting portion 62. The upper wheel 64 is rotatable about a shaft member 64a. The axial direction of the shaft member 64a coincides with the width direction of the tunnel construction device 1.

  The erector base body 60 further includes a pair of extending portions 63 that extend downward from both side portions of the mounting portion 62. The pair of extending portions 63 extends to the lower side of the upper flange 41, and each of them faces the side surface of the web 43. In addition, a lower wheel 65 is attached to each of the pair of extending portions 63. The lower wheel 65 is rotatable about a shaft member 65a. The shaft member 65 a has a proximal end portion fixed to the extending portion 63 and protrudes from the extending portion 63 toward the web 43. The axial direction of the shaft member 65a also coincides with the width direction of the tunnel construction device 1.

  The upper wheel 64 and the lower wheel 65 described above sandwich the upper flange 41 in the vertical direction. The wheels 64 and 65 are configured to roll along the upper and lower surfaces of the upper flange 41. Therefore, the erector base body 60 can be smoothly moved back and forth along the lower rail member 40.

  As long as the erector base body 60 can be smoothly moved, the attachment positions and the number of attachments of the upper wheel 64 and the lower wheel 65 are not particularly limited. In this embodiment, one upper wheel 64 is attached to the rear end portion of the placing portion 62 as shown in FIG. Further, one reinforced upper wheel 64 x is attached to the front end portion of the mounting portion 62. The strength of the reinforced upper wheel 64x is improved compared to the upper wheel 64 at the rear end so as to be able to withstand the weight of the erector mechanism 10. The wheel diameter of the reinforced upper wheel 64x is larger than the wheel diameter of the upper wheel 64 at the rear end.

  On the other hand, two (a pair of) lower wheels 65 are attached to the rear end portion of the extending portion 63. The pair of lower wheels 65 are attached at positions that sandwich the upper wheel 64 at the rear end in the front-rear direction. By providing a plurality of lower wheels 65, even if a large upward force is applied due to the weight of the erector mechanism 10, the erector base body 60 can be smoothly moved back and forth.

Next, the moving mechanism of the erector base body 60 will be described.
As shown in FIGS. 12 to 14, the moving mechanism 80 of the erector base body 60 includes a front sprocket 81, a rear sprocket 82, a chain member 83, and a turnbuckle 84.

  The front sprocket 81 and the rear sprocket 82 are provided on the side of the lower rail member 40. Among the sprockets 81 and 82, for example, the front sprocket 81 is rotationally driven by a drive source M such as a motor. The rotational axes of both sprockets 81 and 82 coincide with the width direction of the tunnel construction device 1.

  One end 83a of the chain member 83 is attached to the front end 63a of the extending portion 63 of the erector base body 60. After the front sprocket 81 and the rear sprocket 82 are laid in this order, the other end 83b is The extension 63 is attached to the rear end 63b. A turnbuckle 84 is provided on the one end 83 a side of the chain member 83. With this turnbuckle 84, the tension of the chain member 83 can be adjusted.

  In the present embodiment, the chain member 83 rotates in accordance with the rotation of the front sprocket 81 and the like, whereby the extending portion 63 moves back and forth, and as a result, the erector base body 60 moves back and forth. Therefore, according to the present embodiment, the erector base body 60 can be moved back and forth with only the members provided on the side of the lower rail member 40, and the overall height of the tunnel construction device 1 can be reduced.

  On the other hand, a basket base body 70 is attached to the upper rail member 50 as shown in FIG. The basket base body 70 is a member that supports the basket mechanism 20. The basket base body 70 is movable back and forth along the upper rail member 50. In this embodiment, the mounting structure and moving structure for the upper rail member 50 of the basket base body 70 are as follows.

  First, as shown in FIG. 10, the upper rail member 50 is composed of a pair of channel steel. More specifically, each upper rail member 50 includes an upper piece 51, a lower piece 52, and a connection piece 53. The upper piece 51 and the lower piece 52 are in the form of a flat plate having the horizontal direction as the width direction. On the other hand, the connection piece 53 has a flat plate shape with the vertical direction as the width direction. Both end portions in the width direction of the connection piece 53 are connected to outer end portions in the width direction of the upper piece 51 and the lower piece 52.

  On the other hand, the basket base body 70 has a support portion 71 positioned above the pair of upper rail members 50. The support portion 71 has a substantially cubic shape. However, as shown in FIG. 1, the front end portion of the support portion 71 is provided with a protrusion 71 a protruding upward. The front surface 71x of the support portion 71 including the front surface of the protrusion 71a is a vertical surface. The basket mechanism 20 is supported on the vertical surface (front surface) 71x.

  As shown in FIG. 10, the basket base body 70 has a pair of extending portions 72 extending downward from both side portions of the support portion 71. A shaft member 73a is attached to the pair of extending portions 72 so as to straddle between the two extending portions 72 and pass through the extending portions 72. The axial direction of the shaft member 73a coincides with the width direction of the tunnel construction device 1. Wheels 73 are attached to both ends of the shaft member 73a. Each of the wheels 73 is located outside the extending portion 72 and is stored in a groove of the upper rail member 50. As both wheels 73 roll in the groove, the basket base body 70 smoothly moves back and forth along the upper rail member 50.

  As long as the basket base body 70 can be moved smoothly, the mounting position and the number of the wheels 73 are not particularly limited. Although not particularly illustrated, the wheel 73 can be attached to, for example, the front end portion and the rear end portion of the extending portion 72.

  The attachment structure and the moving structure for the upper rail member 50 of the basket base body 70 may be the same as the attachment structure and the moving structure for the lower rail member 40 of the erector base body 60, for example. In consideration of the relationship between the height of the tunnel and the height of the tunnel construction device 1 as a whole, it is possible to appropriately determine which structure is adopted.

  In this embodiment, the longitudinal movement length of the erector base body 60 and the longitudinal movement length of the basket base body 70 are not particularly limited. The back-and-forth movement length of the erector base body 60 can be set to 2 to 4 m, for example. Moreover, the back-and-forth movement length of the basket base body 70 can be set to 3 to 5 m, for example.

Next, various mechanisms will be described in order from the erector mechanism 10.
In this embodiment, two erector mechanisms 10 are incorporated so as to be a target across the center line in the width direction of the tunnel construction device 1. The two erector mechanisms 10 have the same structure. Each erector mechanism 10 has an outer boom 11, an inner boom 12, a guide mount (13, 14), and a catcher mechanism 15 as shown in FIGS.

  The outer boom 11 has, for example, a hollow structure with a substantially rectangular cross section. The base end portion 11a of the outer boom 11 is supported on the front surface 61x of the erector base body 60 (support portion 61). This support is performed so that the outer boom 11 can swing in the vertical direction and the horizontal direction with the base end portion 11a of the outer boom 11 as a fulcrum.

  The outer boom 11 is swung in the vertical direction by the expansion and contraction of the lift cylinder 16. The base end portion of the lift cylinder 16 is supported on the front surface of the protrusion 61 a that constitutes the support portion 61. On the other hand, the tip of the lift cylinder 16 is supported at the center of the outer boom 11. The swing range of the outer boom 11 in the vertical direction is, for example, 45 ° upward and 30 ° downward.

  On the other hand, the swinging of the outer boom 11 in the horizontal direction is performed by expansion and contraction of a swing cylinder (not shown). The horizontal swing range of the outer boom 11 is, for example, 45 ° leftward and rightward, respectively.

  The inner boom 12 is inserted into the outer boom 11 from the front end opening of the outer boom 11. The inner boom 12 is slidable in the axial direction so that the exposed length from the opening of the distal end of the outer boom 11 changes. This sliding is performed by expansion and contraction of the slide cylinder 17. The base end portion of the slide cylinder 17 is supported by the center portion of the outer boom 11. Further, the front end portion of the slide cylinder 17 is supported by the central portion of the inner boom 12.

  The guide mounts (13, 14) are composed of a main body portion 13 supported by the distal end portion 12 b of the inner boom 12 and an attachment portion 14 connected to the distal end portion of the main body portion 13. The guide mounts (13, 14) are configured to be substantially L-shaped in plan view by the main body portion 13 and the attachment portion.

  The guide mounts (13, 14) can swing in the horizontal direction with the base end of the main body 13 as a fulcrum. The guide mounts (13, 14) are swung in the horizontal direction by the expansion and contraction of the cylinder 19. The horizontal swing range of the guide mounts (13, 14) is, for example, 45 ° leftward and rightward.

  On the other hand, the mounting portion 14 of the guide mount (13, 14) can swing in the vertical direction with the main body portion 13 as a swing axis. The mounting portion 14 is swung in the vertical direction by the expansion and contraction of the cylinder 18. The swing range of the mounting portion 14 in the vertical direction is, for example, 45 ° upward and 30 ° downward.

  The catcher mechanism 15 includes a proximal catcher 15a and a distal catcher 15b. The proximal catcher 15a is attached to the proximal end portion of the attachment portion 14 of the guide mount (13, 14). On the other hand, the distal catcher 15b is attached to the tip of the support portion 14 of the guide mount (13, 14).

  Both catchers 15a and 15b have the same structure. Both catchers 15a and 15b hold the arcuate support S by opening and closing two claws by expanding and contracting the cylinder 15x.

Next, the basket (lift deck) mechanism 20 will be described.
In this embodiment, two basket mechanisms 20 are incorporated so as to be a target across the center line in the width direction of the tunnel construction device 1. Although the basket mechanism 20 can be only one machine, it is preferable that the basket mechanism 20 is two machines because the support work S can be built, connected, and concrete sprayed quickly. .

  The two basket mechanisms 20 have the same structure. Each basket mechanism 20 includes an outer boom 21, an inner boom 22, a guide mount 23, and a lift deck 25.

  For example, the outer boom 21 has a hollow structure with a substantially rectangular cross section. The base end portion of the outer boom 21 is supported by the front surface 71x of the basket base body 70 (support portion 71). This support is performed so that the outer boom 21 can swing in the vertical direction and the horizontal direction with the base end portion of the outer boom 21 as a fulcrum.

  The outer boom 21 is swung in the vertical direction by the expansion and contraction of the lift cylinder 26. The base end portion of the lift cylinder 26 is supported by the front surface 71 x of the support portion 71. On the other hand, the tip of the lift cylinder 26 is supported at the center of the outer boom 21. The swing range of the outer boom 21 in the vertical direction is, for example, 45 ° upward and 30 ° downward.

  On the other hand, the swinging of the outer boom 21 in the horizontal direction is performed by expansion and contraction of a swing cylinder (not shown). The horizontal swing range of the outer boom 21 is, for example, 45 ° leftward and rightward.

  The inner boom 22 is inserted into the outer boom 21 from the front end opening of the outer boom 21. The inner boom 22 is slidable in the axial direction so that the exposed length from the opening of the distal end of the outer boom 21 changes. This sliding is performed by extending and contracting the slide cylinder 27. The base end portion of the slide cylinder 27 is supported by the central portion of the outer boom 21. The tip of the slide cylinder 27 is supported at the center of the inner boom 22.

  The guide mount 23 is supported at the tip of the inner boom 22. This support is performed so that the guide mount 23 can swing in the vertical direction with the base end portion of the guide mount 23 as a fulcrum. If necessary, the guide mount 23 can be swung in the left-right direction.

  The guide mount 23 swings in the vertical direction by the expansion and contraction of the cylinder 28 supported by the tip end portion of the inner boom 22. The swing range of the guide mound 23 in the vertical direction is, for example, 45 ° upward and 30 ° downward.

  In this embodiment, an auxiliary cylinder 26x having a base end portion supported by the basket base body 70 and a tip end portion supported by the outer boom 21 is provided. The auxiliary cylinder 26x is disposed so as to be substantially parallel to the lift cylinder 26. The auxiliary cylinder 26x is configured to be interlocked with a cylinder 28 for swinging the guide mount 23 in the vertical direction. Due to the expansion and contraction of the auxiliary cylinder 26x, even if the outer boom 21 swings in the vertical direction, the lift deck 25 can always be kept horizontal.

  The lift deck 25 is attached on the guide mount 23. On the lift deck 25, the worker can also perform the construction and connection work of the support work S, the concrete spraying work, and the like.

Next, the structure of the spray mechanism 30 will be described.
In this embodiment, one spraying mechanism 30 is incorporated in the traveling base 2. The spray mechanism 30 may be a plurality of two or more machines.

  The spray mechanism 30 includes an outer boom 31, an inner boom 32, a guide mount 33, and a sprayer 35 as shown in FIGS.

  The outer boom 31 has, for example, a hollow structure with a substantially rectangular cross section. The base end portion of the outer boom 31 is supported by a support base 39 attached to the front center portion of the traveling base 2. This support is performed so that the outer boom 31 can swing in the vertical direction and the horizontal direction with the base end portion of the outer boom 31 as a fulcrum.

  The outer boom 31 is swung in the vertical direction by the expansion and contraction of the lift cylinder 36. The base end portion of the lift cylinder 36 is supported by the support base 39. On the other hand, the tip of the lift cylinder 36 is supported at the center of the outer boom 31. The swing range of the outer boom 31 in the vertical direction is, for example, 45 ° upward and 30 ° downward.

  On the other hand, the swinging of the outer boom 31 in the horizontal direction is performed by expansion and contraction of a swing cylinder 39x provided in the support base 39. The swing cylinder 39x is provided on both sides of the base end portion of the outer boom 31, and is configured such that the outer boom 31 swings by the expansion and contraction of both the swing cylinders 39x. The horizontal swing range of the outer boom 31 is, for example, 45 ° leftward and rightward.

  The inner boom 32 is inserted into the outer boom 31 from the front end opening of the outer boom 31. The tip of the inner boom 32 is bent slightly upward. The rear end side of the inner boom 32 is slidable in the axial direction so that the exposed length from the opening of the distal end portion of the outer boom 31 changes. This sliding is performed by expansion and contraction of a cylinder (not shown) built in the outer boom 31.

  The guide mount 33 is supported at the tip of the inner boom 32. This support is performed so that the guide mount 33 can swing in the vertical direction. This swinging is performed by expansion and contraction of the cylinder 37.

  The sprayer 35 is mounted on the guide mount 34. This attachment is performed such that the sprayer 35 swings in the horizontal direction. This swinging is performed by expansion and contraction of the cylinder 38. The swing range of the spraying machine 35 is 45 degrees to the left and right, for example.

  In performing various operations using the tunnel construction device 1 of this embodiment, first, the crawler 3 and the like are operated to travel the tunnel construction device 1 to the vicinity of the face. Next, the outrigger 4 is extended to the tunnel floor B, and the tunnel construction device 1 is stabilized. Then, primary spraying of concrete or the like is performed using the spraying mechanism 30. Next, the erector mechanism 10 is moved forward, and the pair of supporters S are arranged in an arch shape along the face using the erector mechanism 10. In the tunnel construction device 1 of the present embodiment, the erector mechanism 10 and the basket mechanism 20 can be moved back and forth separately, and the basket mechanism 20 can be kept rearward when the support work S is arranged. Therefore, when the support work S is arranged, the support work S can be prevented from interfering with the basket mechanism 20, and the arrangement work of the support work S can be smoothly advanced.

  When the placement of the support works S is completed, the basket mechanism 20 is moved forward, and an operator or the like performs a connection of the pair of support works S or temporary fixing to the face on the lift deck 25. When the construction work of the support work S is completed in this way, the erector mechanism 10 and the basket mechanism 20 are moved backward as necessary. Then, secondary spraying of concrete or the like is performed using the spraying mechanism 30.

(Other)
The various cylinders provided in the tunnel construction device 1 of the present embodiment can be configured by, for example, a hydraulic cylinder using a hydraulic pump or the like as a drive source. The various mechanisms 10, 20, and 30 incorporated in the traveling base 2 can be freely moved to appropriate positions such as the vicinity of the face of the tunnel and the side wall near the face by operating the various cylinders. .

  The present invention can be applied as an apparatus for tunnel construction in which an erector mechanism, a basket mechanism, and a spray mechanism are incorporated in a traveling base.

  DESCRIPTION OF SYMBOLS 1 ... Tunnel construction apparatus, 10 ... Elector mechanism, 20 ... Basket mechanism, 30 ... Spraying mechanism, 40 ... Lower rail material, 50 ... Upper rail material, 60 ... Base body for erector, 70 ... Base body for basket, S ... support work.

Claims (3)

Elector mechanism, basket mechanism and spray mechanism are built into the traveling base,
At least the erector mechanism and the basket mechanism are tunnel construction devices that are movable back and forth with respect to the traveling base,
Lower rail members extending in the front-rear direction are provided on both sides of the traveling base,
An erector base body is attached to the lower rail material, the erector base body is movable along the lower rail material, and the erector mechanism is supported by the erector base body,
An upper rail member extending in the front-rear direction is provided above at least one of the pair of lower rail members,
A basket base body is attached to the upper rail material, the basket base body is movable along the upper rail material, and the basket mechanism is supported by the basket base body.
Tunnel construction equipment characterized by that. The base body for the erector has a support portion located on the outer side in the width direction of the lower rail material,
The lower end portion of the support portion is located below the upper end edge of the lower rail material,
The erector mechanism is attached to the front surface of the support portion including the front surface of the lower end,
The tunnel construction device according to claim 1. The lower rail material has an upper piece,
A mounting portion in which the base body for the erector is located above the upper piece and integrated with the support portion; and an extending portion that extends from the mounting portion to a position below the upper piece. Have
As a moving mechanism of the base body for the erector, a front sprocket and a rear sprocket provided on the side of the lower rail material, and a chain material laid around the front sprocket and the rear sprocket are provided,
One end of the chain material is attached to the front end of the extension, and after the front sprocket and the rear sprocket are routed, the other end is attached to the rear end of the extension.
The base body for the erector is configured to move back and forth by the rotation of the chain material.
The apparatus for tunnel construction according to claim 2.

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