JP7419199B2 - Shoring installation equipment for tunnels - Google Patents

Description

The present invention relates to a support installation device for a tunnel that installs support along the peripheral wall surface of an excavation shaft during tunnel construction.

In constructing tunnels such as mountain tunnels, the so-called NATM method (New Austrian Tunneling Method) is often adopted. In this NATM construction method, a pit (excavation pit) is formed by excavating the ground using blasting or machinery, and arch-shaped supports made of steel H-beams are installed (erected) near the face. Concrete is repeatedly sprayed onto the surrounding wall (inner surface) of the excavation pit. The shoring is generally divided into two parts on the left and right, and the left shoring and the right shoring are connected to each other to form one shoring. Then, the shoring is sequentially installed along the peripheral wall surface of the excavation shaft in the vicinity of the face using a tunnel shoring installation device.

As an example of such a support installation device for a tunnel, the device disclosed in Patent Document 1 is known. The device disclosed in Patent Document 1 includes a work vehicle (hereinafter referred to as a dolly) and a pair of erectors on the left and right that respectively grip and move shoring (left shoring, right shoring). There is. Each erector is extendable and retractable, and its base end portion is supported by the truck so that it can rotate in the width direction of the truck and in the vertical direction. Specifically, each erector includes a telescoping erector boom that can rotate in the width direction and vertical direction of the bogie, a hand provided at the tip of the erector that can grip the shoring, and a structure between the tip of the erector boom and the hand. It has a turning mechanism provided in the. In this turning mechanism, when the swing jack is driven, the hand turns in the width direction of the truck, and when the tilt motor is driven, the hand turns in the vertical direction.

Japanese Patent Application Publication No. 11-229796

By the way, for example, when installing shoring, there are cases where it is desired to move the shoring in the vertical direction or in the width direction of the excavation shaft. Here, in a state in which the telescoping erector of the conventional device disclosed in Patent Document 1 grips the shoring and moves the shoring along the peripheral wall surface of the excavation shaft (tunnel) near the face. , the erector extends obliquely upward and toward the outside in the width direction of the bogie with respect to the tunnel center line (specifically, the center line passing through the center in the width direction of the excavation shaft and extending in the excavation direction of the excavation shaft). . Therefore, by expanding and contracting the erector as necessary in the tilted state, the shoring can be moved in the vertical direction or in the width direction of the excavation shaft.

However, in the device disclosed in Patent Document 1, if an attempt is made to move the shoring in the vertical direction or width direction only by the expansion and contraction of the erector, the shoring will move in the excavation direction of the excavation shaft (tunnel front-back direction). ) will also move, so some measures may be required.

Therefore, the present invention has been made with attention to this actual situation, and it is possible to finely adjust the position of the shoring along the peripheral wall of an excavation shaft (tunnel) without changing the position in the longitudinal direction of the tunnel. The purpose of this invention is to provide a support installation device for tunnels.

In order to solve the above problem, according to one aspect of the present invention, a support for a tunnel includes a bogie and a pair of erectors for installing the support that can swing in the width direction of the bogie and in the vertical direction, respectively, in front of the bogie. Installation equipment is provided. Each erector of the pair of erectors is provided with a telescoping erector boom, a gripping mechanism provided at the tip of the erector and capable of gripping the shoring, and between the erector boom and the gripping mechanism, and a moving mechanism capable of moving the gripping mechanism in a direction along a tunnel cross section in a posture of gripping the support along the peripheral wall surface.

According to the tunnel shoring installation device according to the present invention, in each erector of the pair of erectors, the gripping mechanism in a posture gripping the shoring along the peripheral wall surface of the tunnel is connected to the erector boom and the gripping mechanism. It can be moved in the direction along the tunnel cross section by a moving mechanism provided between the tunnels. Therefore, the shoring along the peripheral wall surface of the excavation shaft (tunnel) can be moved by the moving mechanism in the direction along the cross section of the tunnel without changing the position of the shoring in the longitudinal direction of the tunnel.

In this way, it is possible to provide a tunnel shoring installation device that can finely adjust the position of the shoring along the peripheral wall surface of the excavated shaft (tunnel) without changing its position in the longitudinal direction of the tunnel.

FIG. 2 is a side view of the tunnel support installation device according to the present embodiment. FIG. 3 is a cross-sectional view of a tunnel constructed using the above-mentioned shoring installation device. It is a partially enlarged top view of the said shoring installation apparatus. It is a partially enlarged side view of the said shoring installation apparatus. FIG. 2 is a partial perspective view of an assembly including a pair of erectors, a base, and a base drive mechanism of the shoring installation device. It is a top view of the main part of the said assembly. It is a side view of the main part of the said assembly. FIG. 3 is a conceptual diagram for explaining the operation of the main parts of the assembly. FIG. 3 is a perspective view of the pair of erector catching arms. It is a perspective view of the above-mentioned catching arm seen from another angle. It is a front view of the said catching arm. It is a top view of the said catching arm. It is a side view of the said catching arm. It is a conceptual diagram for explaining the internal structure of the main part of the said catching arm. It is a conceptual diagram for explaining the operation of the above-mentioned shoring installation device. 16 is a partially enlarged view of FIG. 15. FIG. It is another conceptual diagram for demonstrating the operation|movement of the said shoring installation apparatus. 18 is a partially enlarged view of FIG. 17. FIG. FIG. 7 is a perspective view for explaining a modification of the main parts of the assembly of the pair of erectors, the base body, and the base body drive mechanism. FIG. 20 is a top view of essential parts of the assembly shown in FIG. 19; FIG. 7 is a perspective view for explaining another modification of the main parts of the assembly of the pair of erectors, the base body, and the base body drive mechanism. FIG. 22 is a top view of essential parts of the assembly shown in FIG. 21;

Embodiments of the present invention will be described below based on the drawings.
FIG. 1 is a side view of a tunnel support installation apparatus 100 according to an embodiment of the present invention, and shows a case where the apparatus is applied to constructing a support structure for a mountain tunnel. FIG. 2 is a cross-sectional view of a tunnel constructed using the shoring installation device 100, and is shown in a cross section taken along the line AA shown in FIG. Note that FIG. 1 shows an example of a state in which the shoring installation device 100 is installed in front of the face W. Further, in this embodiment, left and right, up and down, and front and rear are defined when viewed toward the face W.

[tunnel]
First, a tunnel constructed using the shoring installation apparatus 100 shown in FIG. 1 will be described.

The tunnel of this embodiment is a mountain tunnel, and is constructed by, for example, the NATM construction method. The excavated shaft T, which is the main part of the tunnel, is formed by excavating the ground G using a breaker or the like.

As shown in FIG. 2, in this embodiment, the top of the excavation shaft T is formed in an arch shape (approximately semicircular). In addition, as shown in FIG. 1, shoring 1 (steel shoring) made of, for example, steel H-beams is installed along the top and left and right sides of the peripheral wall surface Ta of the excavated shaft T (tunnel). They are provided at predetermined intervals in the excavation direction of T (tunnel front-rear direction). The shoring 1 is formed in a curved arch shape extending in the circumferential direction of the peripheral wall surface Ta in accordance with the cross-sectional shape (see FIG. 2) of the cross section (that is, the tunnel cross section) perpendicular to the excavation direction of the excavation shaft T. ing. The shoring 1 is divided into two parts on the left and right, and the left shoring 1L for the left side of the surrounding wall surface Ta and the right shoring 1R for the right side of the surrounding wall surface Ta are connected to each other to form a single shoring. Engineering 1 is configured.

Concrete is sprayed onto the peripheral wall surface Ta of the excavation shaft T. The peripheral wall surface Ta is primarily supported by shoring 1 and sprayed concrete C, which is concrete sprayed onto the peripheral wall surface Ta. The shotcrete C is sprayed over the entire circumference of the top and left and right sides of the surrounding wall surface Ta so as to fill the spaces between the adjacent shoring structures 1 and 1 and between the shoring structures 1 and the surrounding wall surface Ta. The construction of shotcrete C is performed between the existing shoring 1 and the newly installed shoring 1 every time a new shoring 1 is installed. Although not shown, a plurality of rock bolts penetrate the shotcrete C from the inside of the excavation shaft T at positions spaced apart in the circumferential direction of the peripheral wall surface Ta between the adjacent shoring structures 1 and 1. It is poured so that it reaches G. The construction of the supporting structure by the primary lining (shoring) using shoring 1 and shotcrete C and the casting of rock bolts was repeated, and after that, although not shown in the diagram, a secondary lining with concrete was added from the inside of the shotcrete C. The tunnel will be completed by construction.

[Schematic configuration of shoring installation equipment]
Next, the shoring installation device 100 will be explained.

The shoring installation device 100 is a device for sequentially installing and erecting shoring 1 in the vicinity of the face W. The shoring 1 (left shoring 1L, right shoring 1R) is sequentially installed along the peripheral wall surface Ta in the vicinity of the face W by the shoring installation device 100.

The shoring installation device 100 includes a movable trolley 2 and a pair of left and right erectors 3, 3 for shoring installation that can swing in the width direction of the trolley and in the vertical direction, respectively, in front of the trolley 2. has been done.

The trolley 2 is a movable work vehicle and constitutes the main body of the apparatus. The truck 2 has a body base portion 21 made of a steel member that constitutes the base of the truck 2 (work vehicle).

Wheels 22 are attached to the front end portion and the rear end portion of both sides of the truck 2 (specifically, the vehicle body base portion 21) in the width direction (horizontal direction) of the truck 2, respectively. The trolley 2 is configured to be able to freely run on the bottom surface Tb of the excavation shaft T using wheels 22.

Outriggers 23 for stabilizing the truck 2 are provided at each of the four corners of the truck 2 (vehicle base portion 21). The outriggers 23 extend downward in a state of protruding outward in the width direction of the bogie and touch the bottom surface Tb, so that the bogie 2 (vehicle body base portion 21) is stably installed on the bottom surface Tb. An operating section 24 is provided on the vehicle body base section 21 for operating various devices such as a drive source for the wheels 22 and hydraulic equipment for the pair of erectors 3 and the entire device.

3 and 4 are partially enlarged views including a pair of erectors 3, 3 of the shoring installation device 100, FIG. 3 is a partially enlarged view seen from above, and FIG. 4 is a partially enlarged view seen from the left. be.

A pair of erectors 3, 3 grip the shoring 1 (left shoring 1L, right shoring 1R), move it near the face W, and install the shoring 1 at a predetermined position and direction (attitude). It is for the purpose of The pair of erectors 3, 3 protrude in front of the truck 2, and are spaced apart from each other in the left and right directions (in the width direction of the truck).

For each erector 3 of the pair of erectors 3, 3, when distinguishing between left and right, the left side is called a left erector 3L, and the right side is called a right erector 3R. The left erector 3L and the right erector 3R have the same structure except that they are bilaterally symmetrical.

Each erector 3 includes a telescoping erector boom 31 that is provided so as to extend in front of the truck 2, and a catching arm 32A.

The erector boom 31 is configured to be able to pivot in the width direction of the truck and in the vertical direction using its portion on the truck 2 side as a fulcrum. The erector boom 31 is connected to a swing boom 311 that is swingable (swivelable) in the width direction of the cart and connected to a front end surface 41 of the base body 4 (described later), and to the swing boom 311 that is swingable (raises and falls) in the vertical direction. A tilting boom 313 is connected to the tip of the hoisting boom 312 so as to be able to swing (tilt) in the vertical direction. The erector boom 31 includes a boom rotation cylinder 314 for the rotation operation of the rotation boom 311, a boom hoisting cylinder 315 for the hoisting operation of the hoisting boom 312, and a boom tilt cylinder 316 for the tilt operation of the tilt boom 313. Further, the tip end portion of the hoisting boom 312 is formed into a telescopic shape, and is configured to be extendable and retractable by a boom telescoping cylinder 317. Each cylinder (314, 315, 316, 317) is, for example, a hydraulic cylinder that is extendable and retractable by hydraulic pressure.

Catching arm 32A is attached to the tip of erector boom 31. The catching arm 32A includes a gripping mechanism 32 capable of gripping the shoring 1, and mainly has a function of gripping the shoring 1 (left shoring 1L, right shoring 1R). The gripping mechanism 32 is located at the tip of the catching arm 32A. That is, the gripping mechanism 32 is provided at the tip of the erector 3. Note that the detailed structure of the catching arm 32A including the gripping mechanism 32 will be described in detail later.

[Detailed structure of shoring installation equipment]
Here, the shoring installation device 100 further includes a base 4 and a base drive mechanism 5, and is configured to be able to adjust the overall position and orientation of the pair of erectors 3, 3.

5 to 7 are diagrams for explaining an assembly including a pair of erectors 3, 3, a base 4, and a base drive mechanism 5. FIG. FIG. 5 is a partial perspective view of the assembly, FIG. 6 is a top view of the main parts of the assembly, and FIG. 7 is a side view of the main parts of the assembly.

As shown in FIG. 5, the base body 4 supports the base end portions of the pair of erectors 3, 3 on the side of the truck 2. The base body 4 is made of a steel member, and has a base front end surface 41 to which base end portions of the pair of erectors 3, 3 on the truck side are connected. The base body 4 is generally formed into a plate shape as a whole, and its back surface is reinforced with ribs. The base body 4 is coupled (connected) to the front end portion of the truck 2, specifically, to the front end side (face W side) of the upper surface of the vehicle body base portion 21 via the base body drive mechanism 5. The base body front end surface 41 faces the face W side, and is formed into a generally rectangular shape when viewed from the face W side.

As shown in FIGS. 3 and 6, the pair of erectors 3, 3 are arranged with a base center line They are arranged on the front end surface 41 of the base body symmetrically with respect to the base body center line X2. Therefore, the base center line is located. In addition, in FIGS. 3 to 7, the base body center line X2 is aligned with the device center line X1, which passes through the center in the width direction of the truck and extends in the front-rear direction (longitudinal direction) of the truck 2 in a plan view viewed from above. A substrate 4 is shown.

The base body driving mechanism 5 has a connecting portion 51 that connects the base body 4 to the trolley 2, and drives the base body 4. The base drive mechanism 5 further includes a drive unit 52 that drives the base 4 to adjust the position and orientation of the base 4.

The connecting portion 51 is a connecting member that connects the base body 4 to the truck 2 so that the base body 4 is movable in the width direction of the truck and pivotable around an axis Y extending in the vertical direction. In this embodiment, the connecting portion 51 includes a connecting base portion 511 and a swing arm portion 512.

The connection base portion 511 is fixed on the truck 2 (specifically, on the front end side of the upper surface of the vehicle body base portion 21), and is made of a steel block material. The connecting base portion 511 has a base front end surface 511a facing the back surface of the base body 4. The connecting base portion 511 is configured such that, for example, its base front end surface 511a is parallel to the truck front end surface 21a of the truck 2 (vehicle body base portion 21), and the center in the width direction is located on the device center line X1. It is fixed on the vehicle body base part 21.

The swing arm portion 512 has a base end portion pivotally connected to the front end portion (base front end surface 511a) of the connection base portion 511 via a first pin 513 extending in the vertical direction, and a shaft extending in the vertical direction. It has a tip end rotatably connected to the back side of the base body 4 via a second pin 514 as Y. The first pin 513 is arranged to be located at the widthwise center of the base front end surface 511a (that is, on the device center line X1). Although not particularly limited, in this embodiment, the swing arm portion 512 is provided at two locations, upper and lower. Therefore, the first pin 513 and the second pin 514 are also provided at two locations, upper and lower. The upper swing arm section 512 and the lower swing arm section 512 are connected by an arm connecting member 512a extending in the vertical direction, and are configured to be able to pivot integrally with each other, resulting in more stable pivoting operation. is possible.

The drive unit 52 is a mechanism for moving the base body 4 in the width direction of the truck and turning it around an axis Y extending in the vertical direction.

Specifically, the drive section 52 includes a first drive section 521 for sliding the base body 521 that rotates the swing arm section 512 around the first pin 513 to move the base body 4 in the width direction of the cart, and a first drive section 521 for rotating the base body 4 around the second pin 514. a first drive unit 522 for rotating the base body. The first drive unit 521 for sliding the base body and the first drive unit 522 for rotating the base body each include, for example, a telescopic hydraulic cylinder. The first drive section 521 for sliding the base body is connected at one end to the connection base section 511 and at the other end to a side portion of an arm connection member 512a integrally formed with the swing arm section 512. The first drive parts 522 for rotating the base body are provided, for example, at four locations on the top, bottom, left and right. Each of the first drive parts 522 for rotating the base body has one end connected to the front end (base front end surface 511a) of the connection base part 511, and the other end connected to the back surface of the base 4.

FIG. 8 is a conceptual diagram for explaining the operation of the main part (substrate drive mechanism 5) of the above assembly. FIG. 8(a) shows a state in which the base body center line X2 of the base body 4 coincides with the apparatus center line X1 in a plan view viewed from above (the same state as in FIGS. 3 to 7).

Here, when the base body 4 is to be moved in the width direction of the cart, the first base body sliding drive unit 521 is operated as shown in FIG. 8(b). At this time, the base body 4 moves slightly (retreats) not only in the width direction of the truck but also to the rear side in the longitudinal direction (longitudinal direction) of the truck 2. Therefore, the first drive unit 522 for rotating the base body operates in conjunction with the first drive unit 521 for sliding the base body so as to allow movement of the base body 4 in the front and back direction. Further, when the base body 4 is to be rotated around the axis Y (second pin 514), the first base body rotation drive unit 522 is operated as shown in FIG. 8(c). At this time, the two first drive parts 522, 522 for rotating the base body on the left side and the two first drive parts 522, 522 for rotating the base body on the right side operate in conjunction with each other in opposite directions and with the same stroke. As shown in FIG. 8(d), it is also possible to both move the base body 4 in the width direction of the cart and rotate the base body 4 around the axis Y (second pin 514).

Next, the structure of the catching arm 32A will be explained in detail.

9 to 14 are diagrams for explaining the structure of the catching arm 32A, in which FIG. 9 is a perspective view, FIG. 10 is a perspective view seen from another angle, FIG. 11 is a front view, and FIG. 12 is a top view. FIG. 13 is a side view, and FIG. 14 is a conceptual diagram for explaining the internal structure of main parts. Note that the catching arm 32A of the left erector 3L and the catching arm 32A of the right erector 3R have the same structure, except that they are bilaterally symmetrical. 9 to 14, the catching arm 32A of the left erector 3L is shown, and the catching arm 32A of the left erector 3L will be described as an example.

As shown in FIGS. 9 to 13, the catching arm 32A swings (swivels) in the width direction of the bogie using its base end on the erector boom 31 side as a fulcrum, and attaches to the tip of the erector boom 31 (tilt boom 313). connected. The erector 3 has an arm swing cylinder 318 for swinging the catching arm 32A in the width direction of the truck.

The catching arm 32A is configured to include a gripping mechanism 32 capable of gripping the shoring 1, and a moving mechanism 33 provided between the erector boom 31 and the gripping mechanism 32 and for moving the gripping mechanism 32. . The moving mechanism 33 also has a function as a connecting member that connects the erector boom 31 and the gripping mechanism 32.

Specifically, the gripping mechanism 32 includes a gripping part body 321 extending in one direction, a first gripping part 322 and a second gripping part 323 provided on both sides of the gripping part main body 321 in the longitudinal direction, and a gripping part main body 321. 321 (first grip part 322 in the figure) and an auxiliary grip part 324 provided in parallel with either one of the first grip part 322 or the second grip part 323 (in the figure, the first grip part 322). The first gripping part 322 is arranged on the outside in the width direction of the cart (on the left side in the left erector 3L and on the right side in the right erector 3R).

The grip main body 321 is a member that supports the first grip part 322 and the second grip part 323. The grip main body 321 is parallel to the shoring 1 with each of the gripping parts 322 and 323 gripping the shoring 1 (left shoring 1L, right shoring 1R) (see FIGS. 11 and 12). .

Each gripping part 322, 323 has the same structure. Each gripping part 322, 323 has two gripping claws 34a, 34b facing each other, and by opening and closing the two gripping claws 34a, 34b by expanding and contracting a hydraulic opening/closing cylinder provided inside, the shoring 1 (Left shoring 1L, right shoring 1R) can be gripped. One of the two gripping claws 34a, 34b (gripping claw 34a in the figure) is located and fixed at the tip of the erector 3, and the other of the two gripping claws 34a, 34b (gripping claw 34b in the figure) is configured to move in the direction toward and away from the one (gripping claw 34a in the figure).

The auxiliary grip part 324 is connected to the side of the first grip part 322 in this embodiment. The auxiliary gripping part 324 has two gripping claws 35a and 35b, and is configured to open and close the two gripping claws 35a and 35b by expanding and contracting the opening/closing cylinder of the first gripping part 322. The two gripping claws 35a and 35b, for example, protrude to the side of the first gripping portion 322, and can supplementally grip the shoring 1 at a portion of the shoring 1 that has a relatively small radius of curvature.

The gripping mechanism 32 is connected to the moving mechanism 33 by a shaft for left and right movement, which will be described later, with a portion on the one end side (in the figure, the second gripping portion 323 side) of the gripping body 321 as a fulcrum. It is connected to the left-right moving shaft part 331b (grip mechanism connecting part 331b2) so as to be tiltable with respect to the part 331b. The catching arm 32A has a tilting cylinder 36 for tilting the gripping mechanism 32.

Here, for example, when gripping the left shoring 1L by the gripping mechanism 32 of the left erector 3L, first, each cylinder (see FIGS. 3 and 4, the boom rotation cylinder 314, the boom hoisting cylinder 315, The boom tilt cylinder 316, boom telescoping cylinder 317, arm swing cylinder 318, and tilting cylinder 36) are operated so that the left erector 3L has a length and orientation that allows it to grip the left shoring 1L. The same holds true when the gripping mechanism 32 of the right erector 3R grips the right shoring 1R. For example, the left erector 3L is further operated while gripping the longitudinal intermediate portion of the left shoring 1L, so as to move the left shoring 1L along the left side of the peripheral wall surface Ta of the excavation shaft T in the vicinity of the face W. The right erector 3R is further operated while gripping the longitudinal middle part of the right shoring 1R, and the right erector 3R is moved to the right part of the peripheral wall surface Ta of the excavation shaft T in the vicinity of the face W. Temporarily place it along the

The moving mechanism 33 moves the gripping mechanism 32 in a posture (hereinafter referred to as basic posture) in which it grips the support 1 along the peripheral wall surface Ta of the excavation shaft T (tunnel) along a tunnel cross section (the cross section shown in FIG. 2). This is a mechanism that allows movement in different directions. The tunnel cross section is parallel to the face W, and the moving mechanism 33 is, in other words, a mechanism capable of moving the gripping mechanism 32 in the basic posture in a direction parallel to the face W. For example, suppose that the gripping mechanism 32 of the catching arm 32A shown in FIGS. 12 and 13 is in the basic position gripping the support 1 (left support 1L) along the peripheral wall surface Ta of the excavation shaft T. The moving mechanism 33 of this catching arm 32A can move the shoring 1 (left shoring 1L) in the direction along the tunnel cross section (in other words, the face surface W) by moving the gripping mechanism 32.

In this embodiment, when the gripping mechanism 32 is in the basic position (for example, see FIGS. 12 and 13), the moving mechanism 33 is a shaft portion 331 that can be driven to extend and contract in the direction along the cross section of the tunnel, and the erector It has a shaft portion 331 that forms part of a connecting member between the boom 31 and the gripping mechanism 32. That is, in this embodiment, the shaft portion 331 of the moving mechanism 33 extends in the direction along the tunnel cross section when the gripping mechanism 32 is in the basic posture (in other words, the shaft portion 331 of the moving mechanism 33 extends in the direction along the tunnel cross section and the face W. (extending parallel to the The moving mechanism 33 is configured to move the gripping mechanism 32 in the basic posture in the direction along the tunnel cross section by driving the shaft portion 331 to extend and contract. Further, the shaft portion 331 of the moving mechanism 33 extends in a direction inclined with respect to the tunnel cross section in a state where the gripping mechanism 32 is inclined with respect to the basic posture, and in this state, the moving mechanism 33 is By expanding and contracting the shaft portion 331, the gripping mechanism 32 is moved in a direction along a plane inclined with respect to the cross section of the tunnel.

In this embodiment, the moving mechanism 33 has two shaft portions 331, and the two shaft portions 331, 331 extend in directions intersecting (orthogonal to) each other. Specifically, there is a shaft portion 331 for vertical movement to move the gripping mechanism 32 in the vertical direction, and a shaft portion 331 for horizontal movement to move the gripping mechanism 32 in the width direction (left and right) of the cart. When distinguishing between the two shaft parts 331, 331, the shaft part 331 for vertical movement is called the shaft part 331a for vertical movement, and the shaft part 331 for horizontal movement is called the shaft part 331b for horizontal movement.

In this embodiment, each catching arm 32A (erector 3) further includes a longitudinal movement mechanism 37. The longitudinal direction moving mechanism 37 is provided between the erector boom 31 and the moving mechanism 33, and is capable of moving the gripping mechanism 32 in the basic posture in the tunnel longitudinal direction (in other words, in the direction perpendicular to the tunnel cross section). This is a possible mechanism.

Specifically, when the gripping mechanism 32 is in the basic position, the longitudinal movement mechanism 37 is a shaft portion 371 that can be driven to extend and contract in the longitudinal direction of the tunnel, and the erector boom 31 and the gripping mechanism 32 (in this embodiment It has a shaft portion 371 that forms part of a connecting member between the moving mechanism 33) and the moving mechanism 33). That is, in this embodiment, the shaft portion 371 of the longitudinal direction moving mechanism 37 extends in the tunnel longitudinal direction (extends in a direction perpendicular to the tunnel cross section) when the gripping mechanism 32 is in the basic posture. ). The longitudinal movement mechanism 37 is configured to move the gripping mechanism 32 in the basic posture in the longitudinal direction of the tunnel by driving its shaft portion 371 to expand and contract. In addition, when the shaft portion 371 of the longitudinal direction moving mechanism 37 extends in a direction inclined with respect to the tunnel longitudinal direction in a state where the gripping mechanism 32 is inclined with respect to the basic posture, the longitudinal direction moving mechanism 371 37 moves the gripping mechanism 32 in a direction inclined with respect to the longitudinal direction of the tunnel by driving the shaft portion 371 to extend and contract.

Moreover, each shaft portion 331a, 331b of the moving mechanism 33 and the shaft portion 371 of the longitudinal direction moving mechanism 37 extend in directions intersecting (orthogonal to) each other. That is, in the present embodiment, the catching arm 32A has three shaft parts (371, 331a, 331b) that intersect (orthogonally) each other, and extend in the extending direction of the axis of each shaft part (371, 331a, 331b). It has shaft portions (371, 331a, 331b) that are extendable and retractable and each form a part of a connecting member between the erector boom 31 and the gripping mechanism 32.

In this embodiment, each shaft portion 331a, 331b of the moving mechanism 33 has a fixed portion 332 and a movable portion 333 that is movable with respect to the fixed portion 332. Similarly, the shaft portion 371 of the forward-backward movement mechanism 37 includes a fixed portion 372 and a movable portion 373 that is movable relative to the fixed portion 372.

In this embodiment, the three shaft parts (371, 331a, 331b) of the catching arm 32A each form a part of the connecting member between the erector boom 31 and the gripping mechanism 32, as described above, and the erector boom 31 side, a shaft portion 371 for forward and backward movement (hereinafter appropriately referred to as a shaft portion for forward and backward movement 371), a shaft portion for up and down movement 331a, and a shaft portion for left and right movement 331b are connected in this order.

Specifically, in the three shaft parts (371, 331a, 331b), from the erector boom 31 side, the fixed part 372 of the longitudinal movement shaft part 371, the movable part 373, the fixed part 332 of the vertical movement shaft part 331a, The fixed portion and the movable portion are alternately connected in this order: the movable portion 333, the fixed portion 332 of the horizontal movement shaft portion 331b, and the movable portion 333. That is, in this embodiment, in the two shaft parts 331, 331 (331a, 331b), the fixed part 332 and the movable part 333 are connected alternately in the order of the fixed part 332 and the movable part 333 from the erector boom 31 side. There is.

More specifically, each fixed part (332, 372) and each movable part (333, 373) are each formed into a cylindrical shape. The fixed portion 372 of the longitudinal movement shaft portion 371 is connected to the tip portion (tilt boom 313) of the erector boom 31 so as to be swingable (swivelable) in the width direction of the truck, using the base end portion on the erector boom 31 side as a fulcrum. has been done. The movable portion 373 of the shaft portion 371 for longitudinal movement is attached to be slidable in the axial direction within the fixed portion 372 of the shaft portion 371 for longitudinal movement. A portion of the side portion of the fixed portion 332 of the vertical movement shaft portion 331a is fixed to a portion of the side portion of the movable portion 373 of the shaft portion 371 for longitudinal movement. The movable part 333 of the vertically moving shaft part 331a is attached to be slidable in the axial direction within the fixed part 332 of the vertically moving shaft part 331a. A base end side portion of the side portion of the fixed portion 332 of the horizontal movement shaft portion 331b is fixed to the distal end portion of the movable portion 333 of the vertical movement shaft portion 331a. The movable portion 333 of the left-right moving shaft portion 331b is attached to the fixed portion 332 outside the fixed portion 332 of the left-right moving shaft portion 331b so as to be slidable in the axial direction thereof.

As shown in FIG. 14, in this embodiment, each of the shaft parts (371, 331a, 331b) has a telescopic drive part (374, 334a, 334b), which is made of, for example, a hydraulic cylinder. There is. Hereinafter, the drive section for the longitudinal movement shaft section 371 will be referred to as a longitudinal movement drive section 374, the drive section for the vertical movement shaft section 331a will be called a vertical movement drive section 334a, and the horizontal movement shaft section will be referred to as a drive section for vertical movement. The drive unit for 331b is called a left-right movement drive unit 334b.

Returning to FIGS. 9 to 13, the fixed part 372 of the longitudinally moving shaft part 371 has a first part that protrudes from the side toward the distal end (front) of the fixed part 372. Ribs 372a are provided. One end of the arm swing cylinder 318 for swinging the catching arm 32A in the width direction of the truck is rotatably connected to the tip of the first rib 372a, and the other end of the arm swing cylinder 318 is connected to the erector via a link mechanism 372b. It is connected to the tip of the boom 31 (tilt boom 313).

A gripping mechanism connecting portion 331b2 for connecting to the gripping mechanism 32 is provided on the side surface of the movable portion 333 of the left-right moving shaft portion 331b opposite to the erector boom 31 through a second rib 331b1 protruding from this side surface. It is provided integrally with the movable part 333 of the left-right moving shaft part 331b. Furthermore, a third rib 321a that protrudes downward is provided on one end side (second gripping portion 323 side) of the bottom of the gripping body 321 of the gripping mechanism 32. The third rib 321a is connected to the gripping mechanism connecting portion 331b2 via a tilting pin 321b extending parallel to the back-and-forth movement shaft portion 371 so as to be able to turn (tilt) around the tilting pin 321b. . One end of the tilting cylinder 36 for tilting the gripping mechanism 32 is connected to the gripping mechanism connecting portion 331b2, and the other end of the tilting cylinder 36 is connected to the other end of the gripping body 321. The grip main body 321 of the grip mechanism 32 extends parallel to the left-right movement shaft portion 331b when viewed from above. When the tilting cylinder 36 operates, the gripping mechanism 32 pivots (tilts) around the tilting pin 321b and tilts with respect to the left-right moving shaft portion 331b.

In this embodiment, when the gripping mechanism 32 is in the basic position, in a plan view of the moving mechanism 33 from above, the moving mechanism 33 has an end surface 325 ( 12 and 13), and the end surface 325 of the gripping mechanism 32 forms the tip end surface of the erector 3.

Next, the installation operation of the shoring 1 in the shoring installation device 100 according to this embodiment will be explained. 15 to 18 are conceptual diagrams for explaining the operation of the shoring installation device 100. 15 and 16 mainly describe the operation of the moving mechanism 33, and FIGS. 17 and 18 mainly describe the operation of the base drive mechanism 5. 16 is an enlarged view of the left catching arm 32A shown in FIG. 15, and FIG. 18 is an enlarged view of the main parts including the base body drive mechanism 5 shown in FIG. 17.

For example, you may want to move the shoring 1 (1L, 1R) in the vertical direction or in the width direction of the excavation shaft T before, during, or after connecting the left shoring 1L and the right shoring 1R. . Here, each telescopic erector 3 grips the shoring 1 and moves the shoring 1 (1L, 1R) near the face W along the peripheral wall surface Ta of the excavation shaft T. The erector 3 extends diagonally upward and outward in the width direction of the truck and is inclined. Therefore, by expanding and contracting each erector 3 as necessary in the tilted state, the shoring 1 (1L, 1R) can be moved in the vertical direction or in the width direction of the excavation shaft T. However, if it is attempted to move the shoring 1 in the vertical direction or the width direction only by expanding and contracting the erector 3, the shoring 1 will also move in the front-back direction during this movement. Regarding this point, the shoring installation device 100 uses the moving mechanism 33 to move the shoring 1 as follows.

In the example shown in FIGS. 15 and 16, the shoring 1 is along the circumferential wall surface Ta of the excavation shaft T in the vicinity of the face W, and the position of the shoring 1 in the longitudinal direction coincides with the target position. However, it is assumed that the position of the shoring 1 in the vertical direction and the width direction of the excavation shaft T is shifted from the target position (in the figure, it is shifted diagonally to the upper right). In this example, the gripping mechanism 32 has already been rotated around the tilting pin 321b by the tilting cylinder 36 in the basic posture in which it grips the shoring 1 along the peripheral wall surface Ta of the excavation shaft T. In this state, the moving mechanism 33 of the catching arm 32A moves the gripping mechanism 32 in the basic position gripping the support 1 along the peripheral wall surface Ta of the excavation shaft T in the direction along the tunnel cross section. Taking as an example the catching arm 32A of the left erector 3L shown in FIG. (the face surface W) and extends in the vertical direction, and the shaft portion 331b for left and right movement of the moving mechanism 33 is parallel to the tunnel cross section (the face surface W) and extends in the width direction (horizontal direction) of the excavation shaft T. It is extending. In this state, the vertical movement drive unit 334a is operated to move the gripping mechanism 32 in the vertical direction (downward in the figure), and the left and right movement drive unit 334b is activated to move the gripping mechanism 32 in the left and right direction (to the left in the figure). move it to In this manner, the shoring installation device 100 moves the gripping mechanism 32 in the direction along the cross section of the tunnel, thereby moving the shoring 1 in the vertical and vertical directions without changing the position of the shoring 1 in the longitudinal direction of the tunnel. It is placed at a target position in the width direction of the excavation shaft T.

By the way, when installing the shoring 1, the device center line X1 of the shoring installation device 100 is aligned with the tunnel center line In other words, the front end surface 21a of the cart 2 is at the front center of the face W of the excavation shaft T. It is preferable to operate the erector 3 while facing the surface W. However, in reality, it is often difficult to install the trolley 2 in the ideal state as described above. Regarding this point, the shoring installation device 100 uses the base drive mechanism 5 to move the left shoring 1L to the left shoring 1L as follows before, during, and after the connection between the left shoring 1L and the right shoring 1R. Then, the position of the entire right shoring 1R in the vehicle width direction and the orientation around the axis Y (second pin 514) extending in the vertical direction are adjusted.

Specifically, as shown in FIG. 17, the device center line X1 of the shoring installation device 100 passes through the tunnel center line X0 (specifically, the widthwise center of the excavation shaft T and The shoring installation device 100 is installed in front of the face W in a state where it is tilted in the width direction of the excavation shaft T and shifted in the width direction of the excavation shaft T with respect to the center line extending in the excavation direction of the shaft T. I often get lost.

In such a case, as shown in FIG. 18, the first drive unit 522 for base body rotation is operated to rotate the base body 4 around the axis Y (second pin 514), and the first drive unit for base body sliding is activated. The portion 521 is operated to move the base body 4 in the width direction of the truck. As a result, as shown in FIG. 18, the position and orientation of the base body 4 is adjusted so that the base body center line X2 of the base body 4 is parallel to the tunnel center line X0 and coincides with the tunnel center line X0 when viewed from above. adjust. In addition, in this base body drive mechanism 5, when the first drive unit 521 for base body sliding is operated, the base body 4 is moved not only in the width direction of the truck but also slightly to the rear in the front-rear direction (longitudinal direction) of the truck 2 (backward). )do. When it is desired to correct only the movement of the trolley 2 in the longitudinal direction, for example, the longitudinal movement drive section 374 of the catching arm 32A is activated, and the longitudinal movement mechanism 37 moves the gripping mechanism 32 in the tunnel longitudinal direction (in other words, It is only necessary to move it in a direction perpendicular to the cross section of the tunnel.

According to the tunnel support installation device 100 according to the present embodiment, each erector 3 holds the gripping mechanism 32 in the basic posture gripping the support 1 along the peripheral wall surface Ta of the excavation shaft T (tunnel) in a tunnel cross section. It is configured to include a moving mechanism 33 that can be moved in a direction along. Therefore, in each erector 3, the gripping mechanism 32 in the posture (the basic posture) gripping the support 1 along the peripheral wall surface Ta of the excavation shaft T (tunnel) is provided between the erector boom 31 and the gripping mechanism 32. It can be moved in the direction along the tunnel cross section by the moving mechanism 33 that is moved. As a result, for example, before, during, or after the connection of the left shoring 1L and the right shoring 1R, the gripping mechanism 32 in the basic posture is moved in the direction along the tunnel cross section by the moving mechanism 33. By doing this, the shoring 1 along the peripheral wall surface Ta of the excavated shaft T (tunnel) is moved in the direction along the tunnel cross section without changing the position of the shoring 1 in the longitudinal direction of the tunnel, and the shoring 1 in the vertical direction and the width direction of the excavation shaft T can be finely adjusted.

In this way, a shoring installation device 100 for a tunnel is provided that can finely adjust the position of the shoring 1 along the peripheral wall surface Ta of the excavated shaft T (tunnel) without changing its position in the longitudinal direction of the tunnel. be able to.

In this embodiment, in the shoring installation device 100, each base end of the pair of erectors 3, 3 on the side of the truck 2 is connected to a base body 4, and this base body 4 is moved in the width direction of the truck by a base body drive mechanism 5. and can be rotated around an axis Y (second pin 514) extending in the vertical direction. As a result, even if the cart 2 is installed in a state where the device center line X1 of the shoring installation device 100 is tilted or shifted in the width direction with respect to the tunnel center line X0 (see FIG. 18), the base drive The mechanism 5 moves the base 4 in the width direction of the trolley or rotates the base 4 around an axis Y extending in the vertical direction. Since it can be moved to the same position and orientation as when it is installed in the same position and orientation (see Figures 3 and 4), the operability of the erector 3 is improved and the shoring 1 can be easily installed. It becomes like this. In other words, the bogie 2 (bogie front end surface 21a, base front end surface 511a) is not directly facing the face W but is tilted obliquely, or the bogie 2 (bogie front end surface 21a, base front end surface 511a) is not directly facing the face W. However, even if the device center line X1 is offset in the width direction from the tunnel center line It can be moved to the same position and orientation as if it were installed in the same position and orientation.

In this way, even if the bogie 2 is not installed in an ideal position or orientation, there is provided a shoring installation device 100 for a tunnel that can install the shoring 1 more easily than in the past. be able to.

In this embodiment, the moving mechanism 33 is a shaft portion 331 (331a, 331b) that can be driven to extend and contract in the direction along the cross section of the tunnel when the gripping mechanism 32 is in the basic posture, and is configured to hold the erector boom 31 and the shaft portion 331b. It has a shaft portion 331 (331a, 331b) that forms a part of a connecting member with the mechanism 32. That is, a portion (331) of the connecting member between the erector boom 31 and the gripping mechanism 32 is driven to expand and contract, thereby moving the gripping mechanism 32 in the direction along the tunnel cross section. Thereby, the moving mechanism 33 can be constructed with a relatively simple structure without separately providing a connecting member between the erector boom 31 and the gripping mechanism 32.

In this embodiment, the moving mechanism 33 has two shaft portions 331, and the two shaft portions 331 (331a, 331b) extend in directions that intersect with each other. Thereby, in the tunnel cross section, the gripping mechanism 32 can be moved in two directions (biaxial directions) that intersect with each other. Further, the shaft portion 331 has a fixed portion 332 and a movable portion 333 that is movable with respect to the fixed portion 332. Thereby, the shaft portion 331 can be divided into a portion fixed to other members and a movable portion.

In this embodiment, in the two shaft parts 331 (331a, 331b), the fixed part 332 and the movable part 333 are connected alternately in the order of the fixed part 332 and the movable part 333 from the erector boom 31 side. This provides a compact and simple connection structure in which each shaft portion 331 forms a part of the connection member between the erector boom 31 and the gripping mechanism 32 and can expand and contract independently. I can do it. Further, the shaft portion 331 has drive portions (334a, 334b) for telescopic driving inside, and further compactness of the moving mechanism 33 is achieved.

In this embodiment, the catching arm 32A has a longitudinal movement mechanism 37 that can move the gripping mechanism 32 in the basic posture in the longitudinal direction of the tunnel. Thereby, only the position of the shoring 1 (1L, 1R) in the longitudinal direction of the tunnel can be changed without changing the position in the direction along the tunnel cross section. Moreover, by providing the longitudinal direction moving mechanism 37 between the erector boom 31 and the moving mechanism 33, the moving mechanism 33 can be brought closer to the gripping mechanism 32 side. Note that the longitudinal direction moving mechanism 37 may be provided not only between the erector boom 31 and the moving mechanism 33 but also between the moving mechanism 33 and the gripping mechanism 32.

In the present embodiment, when the gripping mechanism 32 is in the basic position (FIGS. 12 and 13), the moving mechanism 33 is located at the end surface of the gripping mechanism 32 opposite to the cart 2 in a plan view of the moving mechanism 33 from above. The end face 325 of the gripping mechanism 32 forms the tip end face of the erector 3. As a result, when installing the shoring 1 in the vicinity of the face W using the shoring installation device 100, there is no member that protrudes toward the face W from the tip surface (end surface 325) of the erector 3. The tip surface (end surface 325) of the erector 3 can be brought close to the face W, and the shoring 1 can be disposed close to the face W easily.

In this embodiment, the connecting portion 51 of the base drive mechanism 5 includes a connecting base portion 511 and a swing arm portion 512. As a result, the swing arm section 512 is rotated around the first pin 513 to move the base body 4 in the width direction of the truck, and the base body 4 is moved around the axis Y provided at the tip of the swing arm section 512 and extending in the vertical direction. It can be pivoted around two pins 514. That is, in this base drive mechanism 5, all movable parts are connected in the form of pins, and the drive mechanism can be constructed with a relatively simple structure. Furthermore, compared to the base drive mechanism 5 shown in FIGS. 19 to 22, which will be described later, the weight of the device can be reduced.

The base drive mechanism 5 is not limited to the pin type, but may be a roller and pin type as shown in FIGS. 19 and 20, or a roller and bearing type as shown in FIGS. 21 and 22. .

Specifically, in the base drive mechanism 5 shown in FIGS. 19 and 20, the connecting portion 51 is connected to a rail portion 515 fixed on the truck 2 and extending in the width direction of the truck, and a rail portion 515 that is fixed on the truck 2 and extends in the width direction of the truck along the rail portion 515. It is configured to include a movable moving table 516.

The rail portion 515 is fixed on the bogie 2 (the front end side portion of the upper surface of the vehicle body base portion 21), and includes a pair of rail members 515a, 515a provided with an interval in the front-rear direction, and a pair of rails. It consists of a rail support plate 515b connecting between members 515a, 515a.

The movable base 516 includes a movable base body 516b to which a rotatable roller 516a guided by a rail portion 515 (rail member 515a) is attached, and a block portion made of a steel block fixed on the movable base body 516b. 516c. The rollers 516a are attached to a plurality of locations on each of the front side surface and the rear side surface of the movable platform main body 516b at intervals in the cart width direction. The block portion 516c has a block front end surface 516d that faces the back surface of the base body 4. The block portion 516c is configured such that, for example, the front end surface 516d of the block is parallel to the front end surface 21a of the truck 2 (vehicle body base portion 21), and the center in the width direction is located on the device center line X1. , is fixed on the movable table main body 516b.

In the base drive mechanism 5 shown in FIGS. 19 and 20, the connecting portion 51 includes a movable table pin 514' as an axis Y extending in the vertical direction, and the base body is rotatably connected to a moving table 516 (specifically, a protrusion 516e provided on a front end surface 516d of the block portion 516c). The movable table pin 514' is arranged to be located at the center of the block front end surface 516d in the width direction (that is, on the device center line X1). The drive section 52 also includes a second base slide drive section 521' that moves the movable base 516 along the rail section 515 and moves the base 4 in the width direction of the dolly, and a second base slide drive section 521' that moves the base body 4 around the movable base pin 514'. and a second drive unit 522' for rotating the base body. The second drive unit 521' for sliding the base body and the second drive unit 522' for rotating the base body each include, for example, a telescopic hydraulic cylinder. The second base slide driving section 521' has one end connected to the rail support plate 515b of the rail section 515, and the other end connected to the bottom surface of the moving table main body 516b of the moving table 516. The second drive unit 522' for rotating the base body is provided, for example, at two locations on the left and right. Each of the second drive parts 522' for rotating the base body has one end connected to the movable base body 516b of the movable base 516, and the other end connected to the back surface of the base body 4.

In the base body drive mechanism 5 shown in FIGS. 19 and 20, when the base body 4 is to be moved in the width direction of the cart, the second base body sliding drive section 521' is operated. Further, when the base body 4 is to be rotated around the axis Y (movement table pin 514'), the second base body rotation driving section 522' is operated. At this time, the left and right base body rotation second drive units 522', 522' operate in conjunction with each other in opposite directions and with the same stroke. It is also possible to both move the base body 4 in the width direction of the cart and turn the base body 4 around the axis Y (movement base pin 514').

Also, in the base drive mechanism 5 shown in FIGS. 21 and 22, the connecting portion 51 includes a rail portion 515 and a moving table 516. However, this base body drive mechanism 5 is different from the base body drive mechanism 5 shown in FIGS. 19 and 20 in the structure for rotating the base body 4 around an axis Y extending in the vertical direction.

In the base drive mechanism 5 shown in FIGS. 21 and 22, the moving table 516 has a moving table main body 516b and does not have a block portion 516c. Further, the connecting part 51 is a turning table 517 that is provided on the moving table 516 (the moving table main body 516b) and can turn around a rotation axis 514'' serving as an axis Y extending in the vertical direction. It further includes a turning table 517 to which the base body 4 is fixed. The connecting portion 51 rotatably connects the base body 4 to the movable table 516 via the rotary table 517. Specifically, a base block portion 42 that protrudes rearward is formed on the back surface of the base 4, and the base 4 is rotated so that its base center line X2 passes through the rotation axis 514''. It is fixed on a table 517.

In addition, in the base body drive mechanism 5 shown in FIGS. 21 and 22, the drive unit 52 is provided with a base body rotation drive unit 52 that rotates the base body 4 around the rotation axis 514″ instead of the base body rotation second drive unit 522′. 3 drive units 522''. The third drive unit 522'' for rotating the base body is composed of, for example, a telescopic hydraulic cylinder. The third drive unit 522'' for rotating the base body is provided, for example, at two locations on the left and right. Each of the third drive parts 522'' for rotating the base body is connected at one end to the movable base body 516b of the movable base 516, and at the other end to a protrusion on the side surface of the base block portion 42 of the base body 4. .

In the base body drive mechanism 5 shown in FIGS. 21 and 22, when the base body 4 is to be rotated around the axis Y (rotation axis 514''), the third base body rotation drive unit 522'' is operated. At this time, the left and right third base body rotation drive units 522'', 522'' operate in conjunction with each other in opposite directions and with the same stroke. It is also possible to both move the base body 4 in the width direction of the cart and turn the base body 4 around the axis Y (rotation axis 514''). Further, in the base body drive mechanism 5 of FIGS. 19 and 20 and the base body drive mechanism 5 of FIGS. 21 and 22, the base body 4 can be moved only in the width direction of the truck, and the position in the front and rear direction accompanying the movement in the width direction of the truck. No misalignment will occur.

Moreover, each erector 3 does not need to have the longitudinal direction movement mechanism 37. Further, the shoring installation device 100 does not need to have the base drive mechanism 5. In this case, the base body 4 is fixed directly to the carriage 2. Further, although not shown, a pair of spraying booms on the left and right sides each having a spraying nozzle for spraying concrete onto the peripheral wall surface Ta of the excavation shaft T may be provided on the base body front end surface 41 of the base body 4. .

Although the preferred embodiments and modified examples of the present invention have been described above, the present invention is not limited to the embodiments and modified examples, and various modifications and changes can be made based on the technical idea of the present invention. be.

1... shoring,
2... Trolley,
3, 3...a pair of erectors,
31... Erecta boom,
32...gripping mechanism,
325... End surface on the opposite side of the cart in the gripping mechanism,
33...Movement mechanism,
331...Shaft part,
331a...shaft part for vertical movement (shaft part),
331b...Shaft part for left and right movement (shaft part),
332... fixed part,
333...Movable part,
334a... vertical movement drive unit (extension drive drive unit),
334b... Drive unit for left and right movement (drive unit for telescopic drive),
37... Fore-and-aft direction movement mechanism,
4...Base body,
5...base drive mechanism,
51...Connection part,
511...Connection base part,
512...Swing arm section,
513...1st pin,
514...Second pin,
514'...Moving table pin,
514''...Rotation axis center,
515...Rail part,
516...Moving table,
517...Swivel table,
100... Shoring installation device,
T... Excavation pit (tunnel)
Ta...peripheral wall surface,
Y...axis extending in the vertical direction

Claims (8)

A shoring installation device for a tunnel, comprising a bogie and a pair of shoring installation erectors that can swing in the width direction and the vertical direction of the bogie, respectively, in front of the bogie,
Each erector of the pair of erectors is
A telescoping erecta boom,
a gripping mechanism provided at the tip of the erector and capable of gripping the shoring;
A moving mechanism that is provided between the erector boom and the gripping mechanism and is capable of moving the gripping mechanism in a basic position gripping the shoring along the peripheral wall surface of the tunnel in a direction along the cross section of the tunnel. and,
including,
Shoring installation equipment for tunnels. The moving mechanism is a shaft part that can be driven to expand and contract in a direction along the cross section of the tunnel when the gripping mechanism is in the basic position, and is a part of a connecting member between the erector boom and the gripping mechanism. The shoring installation device for a tunnel according to claim 1, wherein the shaft portion forms a section. The tunnel shoring installation device according to claim 2, wherein the moving mechanism has two shaft portions, and the two shaft portions extend in directions that intersect with each other. The tunnel shoring installation device according to claim 3, wherein the shaft portion has a fixed portion and a movable portion movable with respect to the fixed portion. The tunnel shoring according to claim 4, wherein in the two shaft parts, the fixed part and the movable part are connected alternately in the order of the fixed part and the movable part from the erector boom side. Installation equipment. The tunnel shoring installation device according to any one of claims 2 to 5, wherein the shaft portion has a driving portion for driving expansion and contraction therein. Any one of claims 1 to 6, further comprising a longitudinal movement mechanism provided between the erector boom and the movement mechanism and capable of moving the gripping mechanism in the basic posture in the tunnel longitudinal direction. Shoring installation equipment for tunnels as described in . When the gripping mechanism is in the basic posture, in a plan view of the moving mechanism from above, the moving mechanism is located closer to the cart than the end surface of the gripping mechanism opposite to the cart; The tunnel shoring installation device according to any one of claims 1 to 7, wherein the end face forms a tip end face of the erector.