JP6838988B2 - Assembling method of transport device and rotating structure - Google Patents

Description

The present invention relates to a method of assembling a transport device and a rotating structure, and in particular, a transport device that transports an excavator and materials and equipment necessary for excavation as transport objects in order to construct a plurality of second tunnels on the outer periphery of the first tunnel. And the method of assembling the rotating structure used for the transport device.

Conventionally, a transport device for transporting a transported object in order to construct a plurality of second tunnels on the outer periphery of the first tunnel is known (see, for example, Patent Document 1).

The second tunnel is a tunnel formed side by side on the outer circumference of the first tunnel for protection of the first tunnel. The second tunnel is configured as a protective wall around the first tunnel by being filled with concrete or the like after the tunnel is formed.

In Patent Document 1, an annular outer frame and an inner frame are provided around the first tunnel in the starting base skeleton (underground space) formed around the first tunnel, and between the outer frame and the inner frame. A transport device having a configuration in which a plurality of cylindrical transport units capable of holding a transport object is provided, and an outer frame, an inner frame, and a rotary structure in which the plurality of transport units are integrally connected is provided is disclosed. The rotating structure is rotatably supported by an outer ring receiving roller consisting of a single roller arranged at intervals in the circumferential direction between the outer frame and the starting base skeleton, and the inner frame and the first tunnel. It is rotationally driven by a swivel motor arranged between. When the rotating structure rotates around the first tunnel in the circumferential direction, the plurality of transport units are integrally moved in the circumferential direction, and the transported object in the transport unit is transported to a predetermined position in the circumferential direction.

Japanese Unexamined Patent Publication No. 2016-8461

In Patent Document 1, although the rotating structure is supported by a plurality of outer peripheral ring receiving rollers, when the rotating structure having high rigidity is supported, the load is applied to the outer peripheral ring receiving roller composed of a single roller at a specific position. Easy to concentrate. Therefore, it is desired to further disperse the load of the rotating structure.

Further, in Patent Document 1, although the rotary structure is rotationally driven by a swivel motor, when driving a large facility such as a rotary structure, for example, in order to drive a gear, the large gears are engaged with each other. It is difficult to ensure accuracy, and a reducer with a high reduction ratio is required. Therefore, it is desired to facilitate the rotational drive of the rotating structure.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to further disperse the load of the rotating structure and facilitate the rotational driving of the rotating structure. It is to provide a transfer device capable of assembling a rotating structure in the transfer device.

In order to achieve the above object, the transport device according to the first invention transports an excavator used for constructing a plurality of second tunnels on the outer periphery of the first tunnel and materials and equipment necessary for excavation as transport objects. An annular outer frame provided apart from the outer surface of the first tunnel and an annular inner frame provided inside the outer frame and adjacent to the outer surface of the first tunnel. A plurality of rotating structures including a cylindrical transport unit which is installed between the outer frame and the inner frame and can hold each transported object, and an underground structure in which a plurality of rotating structures are installed. A plurality of support rollers are installed between the inner surface of the skeleton wall and the rotating structure, and a plurality of support rollers each in contact with the skeleton wall or the rotating structure are provided so as to be swingable according to the curvature of the contact surface and rotate. a rotation supporting mechanism you rotatably supporting the structure in the circumferential direction, a plurality of installed on the inner surface of the skeleton wall of underground structures that rotary structure is installed, a hydraulic cylinder for rotating the rotary structure in the circumferential direction The rotary drive mechanism comprises a rotary drive mechanism of the type , the rotary structure has a plurality of contact portions arranged at intervals over the entire circumference in the circumferential direction on the outer peripheral portion of the rotary structure, and the rotary drive mechanism is a skeleton. A hydraulic cylinder arranged on the inner surface of the wall in the circumferential direction, and a columnar operating member and a switching cylinder provided at the tip of the hydraulic cylinder are included, and the operating member stands up at an engaging position in contact with the contact portion. The switching cylinder is rotatably provided so as to fall to a release position that does not come into contact with the contact portion, and the switching cylinder is arranged so that the operating member is arranged at the engaging position when driven and the operating member is arranged at the release position when not driven. The operating member is rotated . The underground structure is a concept including an underground space in which a rotating structure is installed and serves as a starting base for excavating a second tunnel. The excavator includes, for example, a shield excavator, and the materials and equipment in that case include a segment (a block constituting a tunnel tunnel wall) used in the shield method.

In the transport device according to the first invention, as described above, a plurality of rotating structures are installed between the inner surface of the skeleton wall of the underground structure and the rotating structures, and a plurality of rotating structures are installed. A support roller is provided so as to be swingable, and a rotary support mechanism for rotatably supporting the rotary structure in the circumferential direction is provided. As a result, when the plurality of support rollers of the rotary support mechanism abut and support the contact surface of either the inner surface of the skeleton wall or the rotary structure, they swing along the contact surface and come into contact with each other. Maintain proper contact without separating from the surface. As a result, even when the rotating structure having high rigidity is supported, the load of the rotating structure can be distributed to each of the plurality of support rollers. Further, since the rotary support mechanism has a plurality of support rollers, the allowable load of the rotary support mechanism is improved as compared with the case where a single roller is used. As a result, the distance between the plurality of rotation support mechanisms can be increased, so that even if the rotation structure has high rigidity, the structure is slightly bent, and the individual rotation support mechanisms (support rollers). And the rotating structure can be sufficiently brought into contact with each other. This also makes it possible to effectively disperse the load of the rotating structure.

Further, in the transport device according to the first invention, as described above, a plurality of hydraulic cylinders are installed on the inner surface of the skeleton wall of the underground structure in which the rotating structure is installed, and the rotating structure is rotationally driven in the circumferential direction. A rotation drive mechanism is provided. As a result, the rotary structure is rotationally driven by utilizing the expansion / contraction operation of the hydraulic cylinder type rotary drive mechanism. As a result, it is not necessary to secure sufficient meshing accuracy or to provide a reduction gear with a high reduction ratio as in the gear drive system using a motor. Further, since the rotary drive mechanism installed on the inner surface of the skeleton wall of the underground structure can drive the outer peripheral side of the rotary structure to exert a large rotational moment, for example, the rotary structure can be applied from the wall surface side of the first tunnel. The rotating structure can be rotationally driven with a smaller driving force as compared with the case of driving the inner peripheral side of the body. As a result of the above, according to the first invention, it is possible to further disperse the load of the rotating structure and facilitate the rotational driving of the rotating structure. Further, the linear motion of the hydraulic cylinder can be efficiently converted into a driving force in the circumferential direction to easily rotate the rotating structure. Then, the switching cylinder can easily prevent the pressing portion (acting member) of the hydraulic cylinder from interfering with the abutting portion of the rotating structure when returning to the initial position. Further, unlike the configuration in which the engaged state and the disengaged state are switched by, for example, an electromagnetic brake, the switching cylinder can be configured by the same hydraulic mechanism as the hydraulic cylinder, so that the device configuration can be simplified.

In the transfer device according to the first invention, preferably, a plurality of rotation support mechanisms are installed on the outer peripheral portion of the rotation structure, and the plurality of support rollers are swung with respect to the inner surface of the skeleton wall of the underground structure. However, it is configured to be able to travel in the circumferential direction integrally with the rotating structure. With this configuration, the rotating structure itself can rotate in the underground structure, so that the rotating structure can be stably rotationally driven.

In the transfer device according to the first invention, preferably, the plurality of rotation support mechanisms are installed at the lower part of the inner surface of the skeleton wall of the underground structure, via the plurality of support rollers that come into contact with the outer peripheral portion of the rotation structure. , The rotating structure is rotatably supported in the circumferential direction. With this configuration, a plurality of rotation support mechanisms can be fixedly installed on the skeleton wall to rotationally support the rotation structure from below. Therefore, unlike the case where the rotation support mechanism is provided on the outer peripheral portion of the rotation structure over the entire circumference, it is sufficient to provide the rotation support mechanism only on the lower part (lower side of the rotation structure) of the underground structure on which the load acts. The number of support mechanisms can be reduced.

In the transfer device according to the first invention, preferably, the rotary support mechanism is between a pair of support rollers, a roller holding portion that holds the pair of support rollers at intervals in the circumferential direction, and the pair of support rollers. It includes a roller support base that supports the roller holding portion around a swing axis that is located and parallel to the axle direction of the support roller. With this configuration, a so-called bogie wheel type swing mechanism in which a pair of support rollers are swingably provided on the roller support base via the roller holding portion can be obtained. As a result, the pair of support rollers can be swung according to the inclination of the contact surfaces, and the contact surfaces can be reliably supported by both support rollers.

In the transfer device according to the first invention , preferably, the rotary drive mechanism includes a first drive set and a second drive set each composed of one or a plurality of hydraulic cylinders, and is based on the hydraulic cylinders of the first drive set. It is configured so that the drive and the drive by the hydraulic cylinder of the second drive set are alternately performed. With this configuration, while one of the first drive set and the second drive set is driving the rotating structure, the other of the first drive set and the second drive set is in the initial position (extension position or contraction). You can return to the limited position). Therefore, even when a hydraulic cylinder that expands and contracts is used, the rotating structure can be smoothly and continuously rotationally driven.

In the transfer device according to the first invention, preferably, the rotating structure includes a horizontal maintenance mechanism including an arcuate pedestal arranged so as to be relatively rotatable in the roll direction around the horizontal central axis of the cylindrical transfer unit. Including, the horizontal maintenance mechanism can adjust the posture of the transported object in at least one of the yaw direction around the vertical axis orthogonal to the axial direction of the transport unit and the pitch direction around the central axis and the horizontal axis orthogonal to the vertical axis. Has a part. Here, in the transport unit of the rotating structure, the rotation angle around the central axis (roll direction) changes with the rotation of the rotating structure in the circumferential direction, but the arc-shaped mount ensures the horizontality in the roll direction. Therefore, the transported object installed on the arcuate pedestal can be stably transported. Further, by providing the horizontal maintenance mechanism with a posture adjusting unit capable of adjusting the posture of the transported object in at least one of the yaw direction and the pitch direction, for example, the starting direction of the excavator can be finely adjusted. As a result, the degree of freedom in the shape of the second tunnel is improved.

In this case, preferably, the posture adjusting unit is configured so that the position can be adjusted by moving the arcuate pedestal in parallel in the vertical axis direction and the horizontal axis direction inside the transport unit. With this configuration, the posture adjusting unit can finely adjust the vertical position and the horizontal (horizontal) position of the transported object in the circular cross section of the cylindrical transport unit. As a result, for example, when loading and unloading materials and equipment into and out of the second tunnel during excavation of the second tunnel, the position of the transporting trolley of the materials and equipment is aligned with the rail for transporting the materials and equipment, and the materials and equipment are smoothly loaded and unloaded. You will be able to do it.

The method of assembling the rotating structure according to the second invention is the method of assembling the rotating structure in the transport device according to the first invention, and the rotating structure is installed on the sub-assembly block in which the rotating structure is divided. The assembled structure part is loaded by the process of assembling the structure part by carrying it in from the first tunnel to the loading position inside the underground structure and the rotation drive mechanism installed in advance on the inner surface of the skeleton wall of the underground structure. By repeating the step of moving from the position in the circumferential direction and the step of joining the structure part moved in the circumferential direction and the structure part of the loading position in the circumferential direction in the underground structure, the rotating structure Assemble the body.

In the method for assembling the rotating structure according to the second invention, as described above, the transfer device according to the first invention further disperses the load of the rotating structure and facilitates the rotational drive of the rotating structure. can do. Then, in the second invention, when assembling the rotating structure of the transport device, the sub-assembly block in which the rotating structure is divided is placed from the first tunnel at the insertion position inside the underground structure in which the rotating structure is installed. The process of carrying in and assembling the structure part, the process of moving the assembled structure part in the circumferential direction from the loading position by the rotation drive mechanism installed in advance on the inner surface of the skeleton wall of the underground structure, and the inside of the underground structure. Then, the step of joining the structure portion moved in the circumferential direction and the structure portion at the loading position in the circumferential direction is repeated. As a result, when the structure part forming a part of the rotating structure is assembled at the insertion position inside the underground structure, the structure part is moved in the circumferential direction, and then another structure part assembled next. And are joined in the circumferential direction. That is, the rotating structure is assembled by extending the structure portion along the circumferential direction. As a result, unlike the general construction method in which the rotating structure is assembled in order from the lower part to the upper part, the assembly work position of the structure part can be fixed to the input position inside the underground structure. It is possible to efficiently assemble a rotating structure in an underground structure having a limited space.

The method for assembling a rotating structure according to the second aspect of the present invention preferably further includes a step of assembling the sub-assembly block in the first tunnel from the constituent members in which the sub-assembly block is divided within the dimension range that can be transported by road. In addition, in this specification, the "dimension range that can be transported by road" is a dimension range that allows a vehicle loaded with cargo (components) to freely travel on the road by law, and a special permission for freight transportation is granted. It means that it can be transported by road without needing it. With this configuration, unlike the case of road transportation of subassembly blocks that exceed the dimensional range that can be transported by road, it can be transported without special permission, so even when constructing a huge structure such as a rotating structure, material transportation It is possible to simplify the preparation process such as. Further, even when the sub-assembly block is transported in units of divided components, by assembling the sub-assembly block in the first tunnel, it is not necessary to assemble the sub-assembly block at the input position inside the underground structure, and the underground structure is not required. The rotating structure can be smoothly assembled in the object.

According to the present invention, as described above, the load of the rotating structure can be more dispersed and the rotational driving of the rotating structure can be facilitated.

It is a schematic diagram which showed the vertical cross section perpendicular to the tunnel traveling direction of the transport device for a shield machine according to one Embodiment. It is a schematic diagram which showed the vertical cross section perpendicular to the tunnel traveling direction of the transport device for material and equipment according to one Embodiment. It is a schematic side view of the transport device for a shield machine and the transport device for materials and equipment. It is an enlarged front view of the transport device which showed the rotation support mechanism. It is a schematic diagram of the vertical cross section along the tunnel traveling direction of the transport device which showed the rotation support mechanism. It is a front view (A) seen from the tunnel traveling direction of a rotation support mechanism, and a side view (B) seen from a circumferential direction. It is a vertical cross-sectional view of the transport device for a shield machine which showed the arrangement example of the rotation support mechanism. It is a vertical cross-sectional view of the transport device for a shield machine which showed the other arrangement example of the rotation support mechanism. It is an enlarged front view of the transport device for a shield machine for explaining a rotation drive mechanism. It is a schematic diagram of the vertical cross section along the tunnel traveling direction of the transport device which showed the rotation drive mechanism. It is a schematic plan view which looked at the rotation drive mechanism from the radial direction of a rotation structure. It is a schematic diagram (A) of the rotation drive mechanism in the state where the actuating member and the contact portion are in contact with each other, and is a schematic diagram (B) of the rotation drive mechanism in a state where the actuating member is switched to the release position by extension. It is a schematic diagram which looked at the rotation drive mechanism in the state where the operating member and the contact portion were in contact with each other from the circumferential direction. It is a schematic diagram of the vertical cross section of the transport device for demonstrating the arrangement of a rotation drive mechanism. It is a time-series schematic diagram (A)-(D) for demonstrating the driving example by the 1st drive set and the 2nd drive set of a rotary drive mechanism. It is a schematic vertical sectional view in front view of the transport unit for explaining a horizontal maintenance mechanism. It is a schematic vertical sectional view in the side view of the transport unit for demonstrating the horizontal maintenance mechanism. It is a schematic diagram which showed the structural example of an arc-shaped pedestal and a roller. It is a schematic view of the front view of the transport unit which showed the structural example of the posture adjustment part. It is a schematic plan view which showed the structural example of the posture adjustment part. It is a schematic vertical sectional view in front view of the transport unit which showed the horizontal maintenance mechanism of the transport device for materials and equipment. It is a figure for demonstrating the sub-assembly block of the rotary structure by one Embodiment. It is an assembly image figure of a sub-assembly block. It is a figure which showed the structural example of the subassembly block which constitutes the transport unit. It is a figure which showed the structural example of the sub-assembly block which constitutes the reinforcing structure part. It is a figure which showed the assembly method of the rotating structure by one Embodiment. It is a figure which showed the assembly method of the rotating structure by one Embodiment. It is a figure which showed the assembly method of the rotating structure by one Embodiment. It is a figure which showed the assembly method of the rotating structure by one Embodiment. It is a figure which showed the progress of the assembly of a rotating structure. It is a figure for demonstrating the final assembly work of a rotating structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, the configuration of the transport device 100 according to the present embodiment will be described with reference to FIGS. 1 to 21.

(Overall configuration of transport device)
As shown in FIGS. 1 and 2, the transport device 100 includes an excavator (shielding machine 5) used for constructing a plurality of second tunnels 2 on the outer periphery of the first tunnel 1 and materials and equipment necessary for excavation. 6 (see FIG. 2) is a transport device that transports the first tunnel 1 in the circumferential direction (C direction) as the transport object 3. Here, the outer circumference of the first tunnel 1 means the outer circumference in a cross section (vertical cross section) perpendicular to the traveling direction of the tunnel as shown in FIGS. 1 and 2, and the circumferential direction is the circumference of the first tunnel 1 in the vertical cross section. It is the direction to go around. The shield machine 5 is an example of an "excavator" within the scope of claims.

The first tunnel 1 is, for example, a large-diameter main-line shield tunnel constructed when a junction of tunnels is installed. The second tunnel 2 is constructed around the first tunnel 1 and is a plurality of shield tunnels having a smaller diameter than the first tunnel 1. The tunnel group including the plurality of second tunnels 2 is formed, for example, from the downstream side of the merging portion toward the merging portion. In this case, the tunnel group composed of the plurality of second tunnels 2 is formed in a trumpet shape as a whole so as to widen the distance from the first tunnel 1 by the amount of connecting the branch line tunnel (not shown) at the confluence to the first tunnel 1. Will be done. Each of the second tunnels 2 is finally configured as a structure for protecting the outer circumference in the vicinity of the junction of the first tunnel 1 and the branch line tunnel by being filled with concrete or the like.

On the outer circumference of the first tunnel 1, a starting base 4 formed in a ring shape so as to surround the periphery is provided. The starting base 4 is an underground space having a circular (annular) vertical cross section surrounding the outer circumference of the first tunnel 1. The starting base 4 is an example of an "underground structure" within the scope of claims. In FIGS. 1 and 2, the skeleton wall 4a of the starting base 4 as a support structure for supporting the transport device 100 is constructed in an annular shape by placing concrete on the ground away from the outer surface of the first tunnel 1. Has been done.

The transport device 100 is constructed on the skeleton wall 4a, and transports the transported object 3 to a predetermined position (starting position) in the circumferential direction within the starting base 4. Each second tunnel 2 is constructed by a shield machine 5 conveyed in the circumferential direction to each starting position using the starting base 4. The shield machine 5 is an excavator that advances while propulsing a shield portion having a shape corresponding to an excavation cross section (here, a circular shape) to excavate the ground and assembling segments in an annular shape to construct a tunnel inner wall. As the transported object 3 other than the shield machine 5, the material / equipment 6 may include, for example, a segment, and may include various equipment such as a motor for driving the shield machine 5, a hydraulic unit, and a control unit.

In the present embodiment, the transport device 100 includes a rotary structure 10 that holds the transported object 3, a rotary support mechanism 20 that rotatably supports the rotary structure 10 in the circumferential direction (C direction) (see FIG. 4). A rotary drive mechanism 30 for rotationally driving the rotary structure 10 in the circumferential direction is provided. When the rotary drive mechanism 30 rotationally drives the rotary structure 10 supported by the rotary support mechanism 20 in the circumferential direction, the rotary structure 10 rotates in the circumferential direction together with the conveyed object 3 to bring the conveyed object 3 into a predetermined position. Transport.

In this embodiment, a plurality of rotating structures 10 are provided. In FIG. 3, a rotating structure 10 for a shield machine for transporting a plurality of shield machines 5 and a rotating structure 10 for materials and equipment for transporting the materials and equipment 6 are provided.

The plurality of rotary structures 10 may be supported by individual rotary support mechanisms 20 and driven by individual rotary drive mechanisms 30. In that case, the transport device 100 can be configured as a plurality of devices, each of which operates independently. The transport device 100 may be configured as three or more devices. FIG. 3 shows an example in which the transport device 100 is composed of two devices, and includes a shield machine transport device 101 (see FIG. 1) having a rotating structure 10 for transporting a plurality of shield machines 5. A material / equipment transfer device 102 (see FIG. 2) having a rotating structure 10 for transporting the material / equipment 6 is provided. In each transfer device, the main structures of the rotation support mechanism 20 and the rotation drive mechanism 30 are common. In the following, items common to both the shield machine transfer device 101 and the material / equipment transfer device 102 may be collectively referred to as the transfer device 100.

As described above, the transport device 100 is installed in the annular starting base 4. For the following explanation, the vertical vertical direction is the vertical direction (Z direction), and the direction along the first tunnel 1 is the front-rear direction or the depth direction (Y direction, see FIG. 3). Of the depth directions, the direction in which the shield machine 5 digs is forward, and the side opposite to the digging direction is backward. The horizontal direction in the circular cross section of the starting base 4 is the left-right direction (X direction).

The shield machine transfer device 101 and the material / equipment transfer device 102 are arranged in the depth direction. The shield machine transfer device 101 is arranged in front of the excavation direction, and the material / equipment transfer device 102 is arranged adjacent to the rear of the shield machine transfer device 101. When the shield machine transfer device 101 conveys the shield machine 5 to a predetermined position (digging start position) and starts excavation, the material / equipment transfer device 102 transfers the material / equipment 6 to a predetermined position from the rear side of the shield machine transfer device 101. It is transported to (digging start position), and the materials and equipment 6 required for the shield machine 5 being dug are transported.

<Rotating structure>
The rotating structure 10 has an annular outer frame 11 provided apart from the outer surface of the first tunnel 1 and an annular shape inside the outer frame 11 and adjacent to the outer surface of the first tunnel 1. Includes a plurality of cylindrical transport units 13 installed between the outer frame 11 and the inner frame 12 and capable of holding the transported object 3, respectively.

The annular outer frame 11 and the annular inner frame 12 are arranged concentrically and are connected to each other via a plurality of transport units 13. The outer frame 11, the inner frame 12, and the plurality of transport units 13 are fixed to each other and rotate integrally. The rotating structure 10 can be reinforced by using the reinforcing structure portion 15 in addition to the plurality of transport units 13. As the reinforcing structure portion 15, rod-shaped ones such as I-shaped steel and H-shaped steel can be adopted, but the present invention is not limited to this, and plate-shaped ones such as steel plates and other shapes are used. You can also do it. In FIGS. 1 and 2, the rotating structure 10 is formed by connecting the outer frame 11 and the inner frame 12 by a plurality of cylindrical transport units 13 and a plurality of rod-shaped reinforcing structure portions 15. It has a truss structure.

In the configuration example of the shield machine transport device 101 shown in FIG. 1, the rotating structure 10 includes six transport units 13 at equal intervals in the circumferential direction. That is, the shield machine transport device 101 can simultaneously transport the six shield machines 5. As a result, the six transported shield machines 5 can be started from their respective starting positions (six locations in the circumferential direction), and the construction can be performed at the same time. In FIG. 1, each transport unit 13 is provided at intervals of approximately 60 degrees in the circumferential direction. Therefore, six second tunnels 2 can be constructed at 0 degree, 60 degree, 120 degree, 180 degree, 240 degree, and 300 degree rotation positions. Further, by arranging each transport unit 13 at a rotation position of 30 degrees, 90 degrees, 150 degrees, 210 degrees, 270 degrees, and 330 degrees between them, further between the above six second tunnels 2. Six second tunnels 2 can be constructed, and a total of 12 second tunnels 2 can be constructed.

In the configuration example of the material / equipment transfer device 102 shown in FIG. 2, an example in which 12 transfer units 13 are provided is shown. By providing more transport units 13, more materials and equipment 6 can be transported to the transport position (excavation position of the second tunnel 2 under construction). In this configuration example, the material / equipment transfer device 102 can perform the transfer operation of the material / equipment 6 independently of the shield machine transfer device 101. The material / equipment transfer device 102 is configured to be able to continuously supply the material / equipment 6 such as segments into the second tunnel 2 excavated by the plurality of shield machines 5.

<Rotation support mechanism>
4 and 5 show a configuration example of the rotation support mechanism 20. A plurality of rotation support mechanisms 20 are provided for each of the plurality of rotation structures 10. A plurality of rotation support mechanisms 20 are installed between the inner surface of the skeleton wall 4a of the starting base 4 where the plurality of rotation structures 10 are installed and the rotation structure 10. The rotary support mechanism 20 is provided with a plurality of support rollers 21 so as to be swingable, and is configured to rotatably support the rotary structure 10 in the circumferential direction.

In the present embodiment, each rotation support mechanism 20 includes a pair of support rollers 21 that can swing around an axis in the depth direction. Specifically, the rotary support mechanism 20 is located and supported between the pair of support rollers 21, the roller holding portion 22 that holds the pair of support rollers 21 at intervals in the circumferential direction, and the pair of support rollers 21. A roller support base 23 that supports the roller holding portion 22 around a swing axis parallel to the axle direction of the roller 21 is included.

In the configuration example of FIG. 6, the rotation support mechanism 20 has a structure in which the support roller 21 having the bearing 24 is rotatably supported by the roller holding portion 22 by the first pin 25. A pair of support rollers 21 are arranged on the roller holding portion 22. The roller holding portion 22 is configured as a wheel box for accommodating two types of wheels (support rollers 21). The pair of support rollers 21 are held at both ends of the roller holding portion 22 in the longitudinal direction at intervals of each other. The pair of support rollers 21 are arranged side by side in a straight line.

The roller holding portion 22 is swingably supported by the roller support base 23 via a second pin 26 in the depth direction arranged in the intermediate portion in the longitudinal direction of the roller holding portion 22. The second pin 26 supports the roller holding portion 22 at an intermediate position between the pair of support rollers 21. As a result, the roller holding portion 22 can rotate (swing) around the axis (second pin 26) in the depth direction with respect to the roller support base 23 with the second pin 26 as the center of rotation.

As a result, when the rotary support mechanism 20 receives a load, the roller holding portion 22 swings until the pair of support rollers 21 of the roller holding portion 22 come into contact with the contact surface CF. The tilt angle of the roller holding portion 22 is determined by the balance of the moment around the second pin 26 due to the load acting on each support roller 21. Therefore, the load acting on the rotation support mechanism 20 is evenly distributed from the second pin 26 and the roller holding portion 22 to the pair of support rollers 21.

In the configuration example of FIG. 7, the plurality of rotation support mechanisms 20 are installed on the outer peripheral portion of the rotation structure 10, respectively. The rotation support mechanism 20 is configured to be able to travel integrally with the rotation structure 10 in the circumferential direction while swinging a plurality of support rollers 21 with respect to the inner surface of the skeleton wall 4a of the starting base 4.

That is, the roller support base 23 is fixed to the outer peripheral portion (outer frame 11) of the rotating structure 10, and the pair of support rollers 21 face the skeleton wall 4a on the outer side in the radial direction. The skeleton wall 4a is provided with, for example, a rail 4b (see FIG. 5) for traveling the support roller 21. The rail 4b may be installed on the inner surface of the skeleton wall 4a, or may be embedded in the skeleton wall 4a so that the traveling surface is arranged on the same surface as the inner surface of the skeleton wall 4a. In the configuration example of FIG. 7, the contact surface CF of the pair of support rollers 21 is the inner surface of the skeleton wall 4a or the rail 4b. The plurality of rotation support mechanisms 20 rotate integrally with the rotation structure 10 in the circumferential direction and travel along the skeleton wall 4a. During traveling, the pair of support rollers 21 change the swing angle according to the curvature of the annular contact surface CF, and maintain the contact state with the contact surface CF.

In the rotation support mechanism 20, a pair of support rollers 21 are arranged together. Therefore, since it is possible to support twice the load by simple calculation as compared with the case where the support mechanism provided with a single support roller is provided at a predetermined interval, the arrangement interval of the rotary support mechanism 20 can be expanded to about twice. .. Therefore, even if the rotating structure 10 has sufficiently high rigidity, some bending can be generated between the rotating support mechanisms 20. Due to the generated deflection, dimensional errors and the like are absorbed, and the support rollers 21 of the respective rotary support mechanisms 20 and the contact surface CF are brought into contact with each other more reliably to promote load distribution. As a result, stable rotational support can be realized.

FIG. 8 shows another arrangement example of the rotation support mechanism 20. In the present embodiment, the rotation support mechanism 20 does not have to be provided in the rotation structure 10. In the configuration example of FIG. 8, the plurality of rotation support mechanisms 20 are installed at the lower part of the inner surface of the skeleton wall 4a of the starting base 4, and rotate via the plurality of support rollers 21 that come into contact with the outer peripheral portion of the rotation structure 10. The structure 10 is rotatably supported in the circumferential direction.

That is, in the configuration example of FIG. 8, the rotation support mechanism 20 is not arranged on the rotation structure 10, but the rotation support mechanism 20 is arranged below the skeleton wall 4a of the starting base 4 on which the rotation structure 10 is installed. It is shown. In this configuration, the rotation support mechanism 20 is fixedly installed on the inner surface of the skeleton wall 4a so as not to move in the circumferential direction. The roller support base 23 is fixed to the inner surface of the skeleton wall 4a, and the support roller 21 is provided toward the rotating structure 10 on the inner side in the radial direction, and comes into contact with the outer peripheral portion (outer frame 11) of the rotating structure 10. The support roller 21 functions like a bearing that rotates with the rotation of the rotating structure 10 while supporting the weight of the rotating structure 10.

In the configuration example of FIG. 8, the contact surface CF of the support roller 21 is the outer peripheral portion of the rotating structure 10 (the outer peripheral surface of the outer frame 11). When the rotating structure 10 is rotated, the pair of support rollers 21 change the swing angle according to the curvature of the annular contact surface CF, and maintain the contact state with the contact surface CF. In the configuration example of FIG. 8, since the rotation support mechanism 20 does not move in the circumferential direction, the rotation support mechanism 20 is simply arranged only under the skeleton wall 4a of the starting base 4 that contributes to the weight support of the rotation structure 10. I'm done. That is, in this configuration example, the number of rotation support mechanisms 20 can be reduced to about half. One or more rotation support mechanisms 20 may be provided on the upper side of the skeleton wall 4a of the starting base 4 for the rotation guide.

In any of the arrangement examples, a plurality of rotation support mechanisms 20 are arranged at intervals in the depth direction of the rotation structure 10 (see FIG. 5). In FIG. 5, three rotation support mechanisms 20 are arranged at intervals at the front end portion, the rear end portion, and the intermediate portion of the rotation structure 10. Since the respective rotation support mechanisms 20 in the depth direction are arranged side by side in the circumferential direction, in FIG. 5, three rows of rotation support mechanisms 20 arranged in the circumferential direction are provided in the depth direction.

<Rotation drive mechanism>
9 and 10 show a configuration example of the rotation drive mechanism 30 of the present embodiment. A plurality of rotation drive mechanisms 30 are installed on the inner surface of the skeleton wall 4a of the starting base 4 where the rotation structure 10 is installed. Each rotary drive mechanism 30 is configured as a hydraulic cylinder type drive mechanism that rotationally drives the rotary structure 10 in the circumferential direction.

In the configuration examples of FIGS. 9 and 10, the rotary drive mechanism 30 includes a drive hydraulic cylinder 31 arranged on the inner surface of the skeleton wall 4a in the circumferential direction. The rotary drive mechanism 30 applies a driving force to a plurality of abutting portions 14 arranged at intervals over the entire circumference in the circumferential direction on the outer peripheral portion of the rotary structure 10 by a driving hydraulic cylinder 31. The rotating structure 10 is configured to rotate in the circumferential direction with respect to the skeleton wall 4a. The drive hydraulic cylinder 31 is an example of a “hydraulic cylinder” within the scope of the claims.

That is, the thrust of the drive hydraulic cylinder 31 of the rotary drive mechanism 30 installed on the skeleton wall 4a of the start base 4 on the fixed side is provided on the outer frame 11 of the rotary structure 10 on the drive side (movable side). By pushing out and moving the contact portion 14, the rotating structure 10 is rotationally driven. The contact portion 14 is a rotating claw (engagement protrusion) provided on the outer frame 11. The contact portion 14 is arranged on the outer frame 11 of the rotating structure 10 at a pitch that matches the stroke of the drive hydraulic cylinder 31.

In the configuration examples of FIGS. 9 and 10, the rotation drive mechanism 30 is arranged on the front side and the rear side in the depth direction with respect to the rotation structure 10, respectively (see FIG. 10). The rotary drive mechanisms 30 of the four types (30-1, 30-3, 30-5, 30-7) are arranged in the circumferential direction on the front side of FIG. 9, and on the back side of FIG. 9 (rear side of FIG. 10). The rotary drive mechanisms 30 of the four types (30-2, 30-4, 30-6, 30-8) are arranged in the circumferential direction. In the configuration example of FIG. 9, out of a total of eight types of rotational drive mechanisms 30, four types (30-1 to 30-4) on one side in the circumferential direction are rotational drive mechanisms 30 for clockwise rotation, and are in the circumferential direction. The other type 4 (30-5 to 30-8) is a rotation drive mechanism 30 for counterclockwise rotation. The contact portion 14 is arranged on the outer frame 11 on the front side in the depth direction and the outer frame 11 on the rear side of the rotating structure 10, respectively.

In the configuration examples shown in FIGS. 11 to 13, the rotary drive mechanism 30 stands up during driving and engages with the abutting portion 14, and falls down during non-driving to release the engagement with the abutting portion 14. And a switching cylinder 33 for operating the operating member 32. The drive hydraulic cylinder 31 applies a driving force to the contact portion 14 by performing either extension operation or contraction operation from the initial position with the operation member 32 upright, and extends the operation member 32 in a tilted state. It returns to the initial position by performing either actuation or contraction. Here, the driving force is applied by pressing the contact portion 14 by the extension operation of the drive hydraulic cylinder 31, but the driving force is applied by pulling the contact portion 14 by the contraction operation of the drive hydraulic cylinder 31. It may be given.

More specifically, the rotary drive mechanism 30 includes a housing 34 that houses the drive hydraulic cylinder 31 inside. A pressing unit 35 for applying a driving force to the contact portion 14 is provided at the rod tip of the driving hydraulic cylinder 31. The switching cylinder 33 and the operating member 32 are provided in the pressing unit 35. The switching cylinder 33 is composed of a hydraulic cylinder like the driving hydraulic cylinder 31. The rotation drive mechanism 30 presses the contact portion 14 provided on the outer frame 11 of the rotation structure 10 by the operating member 32 to act the driving force of the drive hydraulic cylinder 31.

In the configuration examples of FIGS. 11 to 13, the operating member 32 is made of a columnar member, and the lower end thereof is rotatably attached to the pressing unit 35. The switching cylinder 33 expands and contracts the rod connected to the intermediate portion of the operating member 32 so that the operating member 32 is upright at the engaging position P1 (see FIG. 12A) and the operating member 32 is aligned along the circumferential direction. The posture of the operating member 32 is switched between the release position P2 (see FIG. 12B). The switching cylinder 33 raises (rotates) the operating member 32 to switch to the engaging position P1, and lays (rotates) the operating member 32 to switch to the releasing position P2. The engaging position P1 (FIG. 13) is the posture (position) at which the operating member 32 comes into contact with the abutting portion 14 of the rotating structure 10, and the disengaging position P2 is the abutting portion of the operating member 32 with the rotating structure 10. It is a posture (position) that does not come into contact with 14.

As shown in FIG. 12, the rotary drive mechanism 30 is operated by switching the operating member 32 to the engaging position P1 by the switching cylinder 33 and extending the driving hydraulic cylinder 31 from the initial position (reduced position). The member 32 is moved together with the pressing unit 35 in the circumferential direction. As a result, the contact portion 14 is pushed out in the circumferential direction by one stroke of the driving hydraulic cylinder 31 via the operating member 32 that is in contact with the contact portion 14, and the rotating structure 10 is rotated. After the rod (pressing unit 35) of the drive hydraulic cylinder 31 reaches the extension position, the rotary drive mechanism 30 switches the operating member 32 to the release position P2 by the switching cylinder 33, and sets the drive hydraulic cylinder 31 to the initial position. It contracts toward (reduced position). At this time, the operating member 32 passes by without contacting the contact portion 14, and is returned to the initial position (reduced position). As a result, the rotary drive of the rotary structure 10 is realized by the individual rotary drive mechanisms 30.

In the configuration example of FIG. 14, the rotary drive mechanism 30 includes a first drive set DA and a second drive set DB, each of which is composed of one or a plurality of drive hydraulic cylinders 31. Each rotary drive mechanism 30 is configured to alternately drive the drive hydraulic cylinder 31 of the first drive set DA and the drive hydraulic cylinder 31 of the second drive set DB.

For example, of the four types of rotary drive mechanisms (30-1 to 30-4) for clockwise rotation, the rotary drive mechanisms 30-1 and 30-2 form the first drive set DA, and the rotary drive mechanism 30 -3 and 30-4 constitute the second drive set DB. Of the four types of rotary drive mechanisms (30-5 to 30-8) for counterclockwise rotation, the rotary drive mechanisms 30-5 and 30-6 form the first drive set DA, and the rotary drive mechanism 30- 7 and 30-8 constitute a second drive set DB.

As an example, the operations of the first drive set DA and the second drive set DB when rotationally driven in the clockwise direction will be described with reference to FIG. The rotary drive mechanism 30 included in each drive set operates in the same manner. Therefore, the operation of the rotation drive mechanism 30-1 will be described on behalf of the first drive set DA, and the operation of the rotation drive mechanism 30-3 will be described on behalf of the second drive set DB.

For example, as shown in FIG. 15A, rotational drive is started from the first drive set DA. As shown in FIG. 15B, the rotational drive mechanism 30-3 of the second drive set DB starts the contraction operation until the first drive set DA reaches the extension limit.

As shown in FIG. 15C, when the rotation drive mechanism 30-1 of the first drive set DA pushes the contact portion 14 and reaches the extension limit, the rotation drive mechanism 30-3 of the second drive set DB is switched to. The contact portion 14 is pushed and moved to continuously rotate the rotating structure 10.

As shown in FIG. 15D, the drive hydraulic cylinder 31 of the rotary drive mechanism 30-1 that has reached the extension limit starts the contraction operation at the same time as the extension operation of the second drive set DB. That is, the rotation drive mechanism 30-1 operates to the limit for the next operation while contracting the switching cylinder 33 and tilting the operating member 32 to prevent interference with the contact portion 14.

After that, when the drive hydraulic cylinder 31 of the first drive set DA reaches the contraction limit, the switching cylinder 33 is extended to raise the operating member 32 and the contact portion 14 is set to the engaging position P1. Then, the rotation drive mechanism 30-3 of the second drive set DB that has reached the extension limit is switched, and the rotation drive mechanism 30-1 of the first drive set DA pushes and moves the contact portion 14 to continuously move the rotation structure 10. And rotate. By repeating this operation, it can be continuously rotated. Here, the case of rotationally driving in the clockwise direction has been described, but the same applies to the case of rotating and driving in the counterclockwise direction, and the description thereof will be omitted.

<Horizontal maintenance mechanism>
A configuration example of the horizontal maintenance mechanism 40 is shown in FIG. In FIGS. 1 and 2, while the rotating structure 10 makes one rotation, the direction of the transport unit 13 changes by 360 degrees according to the rotation angle. The rotating structure 10 includes a horizontal maintenance mechanism 40 in order to prevent the transported object 3 in the transport unit 13 from rotating. The horizontal maintenance mechanism 40 maintains the conveyed object 3 up and down with respect to the rotation of the conveyed unit 13 accompanying the movement in the circumferential direction. The horizontal maintenance mechanism 40 includes an arc-shaped pedestal 41 arranged so as to be relatively rotatable in the roll direction Qr around the central axis of the cylindrical transfer unit 13 in the horizontal direction (Y direction).

As shown in FIGS. 16 and 17, the horizontal maintenance mechanism 40 is provided inside each transport unit 13. The leveling mechanism 40 is installed in all the transport units 13, and has a function of always maintaining the level regardless of the position (rotation angle in the circumferential direction) of each transport unit 13.

As shown in FIG. 18, the arcuate pedestal 41 is arranged on the inner peripheral portion of the annular frame constituting the transport unit 13 of the rotating structure 10 via a plurality of rollers 42. The arc-shaped mount 41 has a shape along the inner peripheral surface of the transport unit 13. The arc-shaped mount 41 is arranged inside the transport unit 13 by the rollers 42 so as to be relatively rotatable in the roll direction QR around the central axis. The central axis is the central axis of the cylindrical transport unit 13 extending in the depth direction. The roller 42 is provided with a plurality of side rollers (not shown) in order to suppress movement in the thrust direction (roller axial direction, Y direction).

Further, the horizontal maintenance mechanism 40 includes a drive roller 43a for driving the arcuate frame 41 in the roll direction QR, and a drive device 43b for driving the drive roller 43a. The drive device 43b can rotationally drive the drive roller 43a to move the arcuate pedestal 41 along the inner peripheral surface of the transport unit 13 in the roll direction QR.

The horizontal maintenance mechanism 40 can always be kept substantially horizontal by the own weight and eccentricity of the horizontal maintenance mechanism 40, and by the own weight and eccentricity of the mounted conveyed object 3, but the driving roller 43a and the driving device 43b can keep the horizontal maintenance mechanism 40 substantially horizontal. , Attitude control is possible to adjust the accurate horizontal position.

A shield machine stand 44 is installed on the arcuate stand 41 of the transport unit 13 for the shield machine. The shield machine stand 44 (see FIG. 17) is configured to be able to support the outer peripheral surface of the cylindrical shield machine 5.

Here, in the present embodiment, the horizontal maintenance mechanism 40 has a yaw direction Qy (see FIG. 20) around the vertical axis orthogonal to the axial direction of the transport unit 13, and a pitch direction around the horizontal axis orthogonal to the central axis and the vertical axis. It has an attitude adjusting unit 45 capable of adjusting the attitude of the conveyed object 3 in at least one of Qp (see FIG. 17). That is, the horizontal maintenance mechanism 40 has a function of finely adjusting the position and posture of the transported object 3 in the transport unit 13 by the posture adjusting unit 45 in addition to maintaining the horizontal. The axial direction of the transport unit 13 coincides with the Y direction, and the vertical axis of the transport unit 13 coincides with the Z direction. The horizontal axis orthogonal to the central axis and the vertical axis coincides with the X direction. Here, a configuration example of the posture adjusting unit 45 capable of adjusting the postures in both the yaw direction Qy and the pitch direction Qp is shown.

As shown in FIGS. 19 and 20, the posture adjusting unit 45 includes a plurality of elevating hydraulic cylinders 45a and a plurality of horizontal hydraulic cylinders 45b. The shield machine pedestal 44 is installed on the arc-shaped pedestal 41 via the elevating hydraulic cylinder 45a and the horizontal hydraulic cylinder 45b.

The elevating hydraulic cylinder 45a is symmetrically arranged on both the left and right sides of the shield machine stand 44 in a plan view (see FIG. 20), and is arranged on both the front and rear sides, respectively. That is, the elevating hydraulic cylinders 45a are arranged at the four corners of the shield machine stand 44, respectively. The elevating hydraulic cylinder 45a is provided so as to expand and contract in the vertical axis direction (Z direction).

In the horizontal view, the horizontal hydraulic cylinder 45b has four sets arranged two by two from the center in the left-right direction toward both outer sides, and is symmetrically arranged on both front and rear sides of the shield machine stand 44, for a total of eight. This is provided. The horizontal hydraulic cylinders 45b are provided so as to expand and contract in the horizontal axis direction (X direction).

Since the elevating hydraulic cylinder 45a and the horizontal hydraulic cylinder 45b are each composed of a plurality of hydraulic cylinders, the positions can be adjusted in parallel by controlling the strokes of the respective cylinders by the same amount, and the strokes of the respective cylinders can be adjusted. The posture (angle) can be adjusted by controlling the cylinders differently.

For example, if the stroke of the elevating hydraulic cylinder 45a is different in the front-back direction (Y direction), the posture (tilt angle) in the pitch direction Qp can be adjusted, and if the horizontal hydraulic cylinder 45b is different in the front-rear direction, the posture in the yaw direction Qy. (Inclination angle) can be adjusted.

Further, in the present embodiment, the posture adjusting unit 45 can adjust the position by moving the arcuate pedestal 41 in the vertical axis direction (Z direction) and the horizontal axis direction (X direction) in parallel inside the transport unit 13. It is configured. That is, by matching the strokes of the elevating hydraulic cylinder 45a, the position in the vertical direction (Z direction) can be adjusted by translation, and by matching the strokes of the horizontal hydraulic cylinder 45b, the position in the left-right direction (X direction) can be adjusted by translation. Can be adjusted.

As described above, in the present embodiment, the horizontal maintenance mechanism 40 rotates the conveyed object 3 (shield stand 44) in each rotation direction (around three orthogonal axes) in the roll direction Qr, the yaw direction Qy, and the pitch direction Qp. And the position of the conveyed object 3 (shield stand 44) in the vertical direction (vertical direction, Z direction) and the horizontal direction (horizontal direction, X direction) can be adjusted.

Although the description is omitted, the horizontal maintenance mechanism 40 provided in the transport unit 13 for materials and equipment also has the same configuration and has the same function. In the material / equipment transport device 102 shown in FIG. 21, a flat material / equipment transport stand 46 is provided so as to transport the material / equipment 6 instead of the shield machine stand 44. Other points are the same as those of the shield machine transport device 101.

As described above, the transport device 101 for a shield machine shown in FIG. 1 uses a rotation support mechanism 20 and a rotation drive mechanism 30 to rotate the rotation structure 10 in the circumferential direction, and the shield machine to a predetermined starting position. 5 is transported. It is possible to rotate the rotating structure 10 every 60 degrees, carry in six shield machines 5 in sequence, start them at the same time, and perform construction at the same time.

The material / equipment transfer device 102 shown in FIG. 2 uses the rotation support mechanism 20 and the rotation drive mechanism 30 to rotate the rotary structure 10 in the circumferential direction, and the material / equipment 6 is moved to the excavation position of each of the second tunnels 2. To transport. When the rotating structure 10 is rotated every 30 degrees and the transported object 3 is sequentially carried into the 12 transport units 13 and the transport unit 13 loaded with the materials and equipment 6 reaches the excavation position to be the transport destination, the materials and equipment are used. 6 passes through the shield machine transport device 101 and is transported to the excavation position.

(Effect of the transport device of this embodiment)
In the transport device 100 of the present embodiment, the following effects can be obtained.

In the present embodiment, as described above, a plurality of rotating structures 10 are installed between the inner surface of the skeleton wall 4a of the starting base 4 and the rotating structure 10, and a plurality of support rollers are installed. 21 is provided so as to be swingable, and a rotation support mechanism 20 for rotatably supporting the rotation structure 10 in the circumferential direction is provided. As a result, when the plurality of support rollers 21 of the rotation support mechanism 20 abut and support the contact surface CF (see FIGS. 7 and 8) of either the inner surface of the skeleton wall 4a or the rotation structure 10. , It swings along the contact surface CF to maintain an appropriate contact state without being separated from the contact surface CF. As a result, even when the rotating structure 10 having high rigidity is supported, the load of the rotating structure 10 can be distributed to each of the plurality of support rollers 21. Further, since the rotation support mechanism 20 has a plurality of support rollers 21, the allowable load of the rotation support mechanism 20 is improved as compared with the case where a single roller is used. As a result, since the distance between the plurality of rotation support mechanisms 20 can be increased, the structure of the rotation structure 10 having high rigidity is slightly bent by that amount, and the individual rotation support mechanisms 20 ( The support roller 21) and the rotating structure 10 can be sufficiently brought into contact with each other. This also makes it possible to effectively disperse the load of the rotating structure 10.

Further, in the present embodiment (see FIG. 9), as described above, a plurality of rotary structures 10 are installed on the inner surface of the skeleton wall 4a of the starting base 4 where the rotary structure 10 is installed, and the rotary structure 10 is rotationally driven in the circumferential direction. A rotary drive mechanism 30 of the drive hydraulic cylinder 31 type is provided. As a result, the rotary structure 10 is rotationally driven by utilizing the expansion / contraction operation of the rotary drive mechanism 30 of the drive hydraulic cylinder 31 type. As a result, it is not necessary to secure sufficient meshing accuracy or to provide a reduction gear with a high reduction ratio as in the gear drive system using a motor. Further, since the rotation drive mechanism 30 installed on the inner surface of the skeleton wall 4a of the starting base 4 can drive the outer peripheral side of the rotation structure 10 to exert a large rotation moment, for example, the wall surface of the first tunnel 1 The rotary structure 10 can be rotationally driven with a smaller driving force as compared with the case where the inner peripheral side of the rotary structure 10 is driven from the side. As a result of the above, according to the transport device 100 of the present embodiment, the load of the rotary structure 10 can be more dispersed and the rotary drive of the rotary structure 10 can be facilitated.

Further, in the configuration example of FIG. 7 of the present embodiment, as described above, a plurality of rotation support mechanisms 20 are installed on the outer peripheral portion of the rotation structure 10, respectively, with respect to the inner surface of the skeleton wall 4a of the starting base 4. While swinging the plurality of support rollers 21, the rotating structure 10 is integrally formed so as to be able to travel in the circumferential direction. As a result, the rotating structure 10 itself can rotate in the starting base 4, so that the rotating structure 10 can be stably rotationally driven.

Further, in the configuration example of FIG. 8 of the present embodiment, as described above, a plurality of rotation support mechanisms 20 are installed at the lower part of the inner surface of the skeleton wall 4a of the starting base 4, and are in contact with the outer peripheral portion of the rotation structure 10. The rotating structure 10 is rotatably supported in the circumferential direction via a plurality of supporting rollers 21 in contact with each other. As a result, the plurality of rotation support mechanisms 20 can be fixedly installed on the skeleton wall 4a, and the rotation structure 10 can be rotationally supported from below. Therefore, unlike the case where the rotation support mechanism 20 is provided on the outer peripheral portion of the rotation structure 10 over the entire circumference, only the rotation support mechanism 20 is provided only on the lower part (lower side of the rotation structure 10) of the starting base 4 on which the load acts. The number of rotation support mechanisms 20 can be reduced.

Further, in the present embodiment (see FIG. 6), as described above, the rotary support mechanism 20 includes a pair of support rollers 21 and a roller holding portion 22 that holds the pair of support rollers 21 at intervals in the circumferential direction. The configuration includes a roller support base 23 that is located between the pair of support rollers 21 and supports the roller holding portion 22 around the swing axis parallel to the axle direction of the support rollers 21. As a result, a so-called bogie wheel type swing mechanism in which a pair of support rollers 21 are swingably provided on the roller support base 23 via the roller holding portion 22 can be obtained. As a result, the pair of support rollers 21 can be swung according to the inclination of the contact surface CF, and the contact surface CF can be reliably supported by both support rollers 21.

Further, in the present embodiment (see FIG. 9), as described above, a plurality of contact portions 14 in which the rotation drive mechanism 30 is arranged on the outer peripheral portion of the rotary structure 10 at intervals over the entire circumference in the circumferential direction. By applying a driving force to the driving hydraulic cylinder 31, the rotating structure 10 is configured to rotate in the circumferential direction with respect to the skeleton wall 4a. As a result, the driving hydraulic cylinder 31 directed in the circumferential direction is extended and contracted in the tangential direction of the rotating structure 10 to apply a driving force in the circumferential direction to the outer peripheral portion (contact portion 14) of the rotating structure 10. be able to. As a result, the linear motion of the driving hydraulic cylinder 31 can be efficiently converted into a driving force in the circumferential direction to easily rotationally drive the rotating structure 10.

Further, in the present embodiment (see FIGS. 14 and 15), as described above, the rotation drive mechanism 30 includes a first drive set DA and a second drive set DB each composed of one or a plurality of hydraulic cylinders. Including, the drive by the drive hydraulic cylinder 31 of the first drive set DA and the drive by the drive hydraulic cylinder 31 of the second drive set DB are alternately performed. With this configuration, while one of the first drive set DA and the second drive set DB is driving the rotating structure 10, the other of the first drive set DA and the second drive set DB is in the initial position ( You can return to the extended or contracted position). Therefore, even when a hydraulic cylinder that expands and contracts is used, the rotary structure 10 can be smoothly and continuously rotationally driven.

Further, in the present embodiment (see FIG. 12), as described above, the rotary drive mechanism 30 is provided with the operating member 32 and the switching cylinder 33, and the driving hydraulic cylinder 31 is initially in a state where the operating member 32 is upright. A driving force is applied to the contact portion 14 by performing either extension or contraction from the position, and rotation is performed so as to return to the initial position by performing the extension or contraction while the operating member 32 is tilted. The drive mechanism 30 is configured. The switching cylinder 33 can easily prevent the pressing portion (operating member 32) of the driving hydraulic cylinder 31 from interfering with the abutting portion 14 of the rotating structure 10 when returning to the initial position. Further, unlike the configuration in which the engaged state and the disengaged state are switched by, for example, an electromagnetic brake, the switching cylinder 33 can be configured by the same hydraulic mechanism as the driving hydraulic cylinder 31, which simplifies the device configuration. be able to.

Further, in the present embodiment (see FIGS. 16 and 20), as described above, the rotating structure 10 is provided with a horizontal maintenance mechanism 40 including an arcuate pedestal 41 arranged so as to be relatively rotatable in the roll direction Qr. The horizontal maintenance mechanism 40 is provided with a posture adjusting unit 45 capable of adjusting the posture of the transported object 3 in at least one of the yaw direction Qy (see FIG. 20) and the pitch direction Qp (see FIG. 17). As a result, the horizontality of the roll direction Qr can be ensured by the arc-shaped pedestal 41, so that the conveyed object 3 installed on the arc-shaped pedestal 41 can be stably conveyed. Further, the attitude adjusting unit 45 can make fine adjustments of the starting direction (yaw direction Qy and pitch direction Qp) of the excavator, for example. As a result, the degree of freedom in the shape of the second tunnel 2 is improved.

Further, in the present embodiment (see FIG. 20), as described above, the posture adjusting unit 45 is placed inside the transport unit 13, and the arcuate frame 41 is placed in the vertical axis direction (Z direction) and the horizontal axis direction (X direction). The position can be adjusted by moving it in parallel. Thereby, the vertical direction (Z direction) position and the horizontal direction (X direction) position of the conveyed object 3 in the conveyed unit 13 can be finely adjusted. As a result, for example, when the material / equipment 6 is carried in / out of the inside of the second tunnel 2 during the excavation of the second tunnel 2, the position of the transport trolley of the material / equipment 6 is smoothly aligned with the rail for transporting the material / equipment. You will be able to carry in and out.

<Assembly method of rotating structure>
Next, a method of assembling the rotating structure 10 in the transport device 100 of the present embodiment will be described with reference to FIGS. 22 to 31.

As shown in FIG. 22, in the present embodiment, the rotating structure 10 is constructed by a combination of sub-assembly blocks 50 (see the broken line portion) in which the rotating structure 10 is divided. The rotating structure 10 is, for example, a frame structure made of a standard steel material. As shown in FIG. 23, the rotating structure 10 is divided into sub-assembly blocks 50 and assembled in the starting base 4 which is an underground space. The individual sub-assembly blocks 50 are assembled from the constituent members 51 as the smallest assembly unit.

The component 51 constitutes each part of the rotating structure 10, such as the outer frame 11, the inner frame 12, and the transport unit 13. The component 51 is manufactured with a welded integral structure, for example, within a dimension range that can be transported by road without a special permission application. After the component 51 is manufactured, the component 51 is transported to the construction site, and the component 51 is joined by bolts and nuts at the assembly site at the construction site to be assembled as a sub-assembly block 50.

In the example of FIG. 23, one transport unit 13 is composed of a sub-assembly block 50 divided into two left and right in a front view. In the rotating structure 10 for the shield machine, the constituent members 51 including the semicircular unit portion shown in the front view are arranged in three rows in the depth direction (see FIG. 3), and each of them is connected in a plurality of depth directions. The transport unit 13 is composed of sub-assembly blocks 50 having a three-dimensional frame structure joined by members 52 (see FIG. 3).

Three (three rows) structural surfaces (see FIG. 3) are formed in the depth direction by the three constituent members 51 extending in the surface direction (longitudinal cross-sectional direction orthogonal to the depth direction) of the rotating structure 10. Therefore, at the time of transportation, the connecting member 52 in the depth direction of the sub-assembly block 50 including the constituent members 51 for three rows can be removed and disassembled into the constituent members 51 for each surface.

FIG. 24 shows the constituent members 51a of the transport unit 13, and FIG. 25 shows the constituent members 51b of the reinforcing structure portion 15 (framework portion of the truss structure, see FIG. 1) between the transport units. If it is within the range of the road transport restriction dimension, an accessory device such as a rotation support mechanism 20 is installed in the constituent member 51 in advance as much as possible. Therefore, 51 units of the constituent members can be loaded on the transport vehicle and transported to the assembly site without requiring a special transport permit.

Next, the procedure for assembling the rotating structure 10 will be described. 26 to 31 show an assembly procedure at a construction site.

In the example of FIG. 26, a communication opening 61 connected to the starting base 4 and an assembly site 62 are installed in the lower part of the existing first tunnel 1 in the center. The communication opening 61 may be provided in a portion other than the lower portion, such as the side portion of the first tunnel 1. A plurality of communication openings 61 may be provided, such as on the left and right sides of the first tunnel 1. The assembly site 62 is an example of the “insertion position” in the claims.

<Step S1: Step of assembling the sub-assembly block in the first tunnel>
In the present embodiment, a step of assembling the sub-assembly block 50 (see the broken line portion) in the first tunnel 1 is carried out from the constituent members 51 in which the sub-assembly block 50 is divided within the dimension range that can be transported by road.

An assembly device such as a portal crane 63 is installed at a position where the connecting opening 61 of the first tunnel 1 is formed. The component 51 such as the rotating structure 10 transported from the ground into the first tunnel 1 is assembled into the sub-assembly block 50 in the first tunnel 1 by the portal crane 63. That is, in the example of FIG. 23, the three rows of the constituent members 51 are connected by the connecting member 52 to form the sub-assembly block 50 having a three-dimensional skeleton structure. In the example of FIG. 22, the rotating structure 10 is composed of a total of 24 blocks of subassembly blocks 50. How many blocks the rotating structure 10 is divided into is appropriately determined in consideration of workability at the assembly site 62, the size of the connecting opening 61, and the like.

That is, if the sub-assembly block 50 is within the size and mass that can be assembled by the portal crane 63 in the first tunnel 1 and can be transported to the assembly site 62 through the connecting opening 61, the sub-assembly block 50 is more suitable. Many constituent members 51 may be used to increase the size. For example, the sub-assembly blocks 50 divided into two on the left and right may be combined to form a sub-assembly block having the size of one transport unit 13.

<Step S2: Step of assembling the structure part>
Next, a step of carrying the sub-assembly block 50 in which the rotary structure 10 is divided into the assembly site 62 inside the starting base 4 where the rotary structure 10 is installed from the first tunnel 1 to assemble the structure portion 53. Is carried out. The structure portion 53 is a part of the rotating structure 10 composed of a plurality of sub-assembly blocks 50.

In the example of FIG. 26, the sub-assembly block 50 sub-assembled in the first tunnel 1 up to the size of the transport unit 13 divided into two left and right is put into the assembly site 62 below the starting base 4.

At the assembly site 62 provided at the lower part of the starting base 4, a temporary assembly stand (not shown) and a rotation drive mechanism 30 are already installed. The sub-assembly block 50 thrown into the assembly site 62 can be moved in the circumferential direction (C direction) at the assembly site 62 to secure a space for throwing the next sub-assembly block 50 into the assembly site 62.

As shown in FIG. 27, when the next sub-assembly block 50 is thrown into the assembly site 62, block assembly of the sub-assembly blocks 50 with the sub-assembly block 50 that has already been thrown is performed. Each of the following sub-assembly blocks 50 is aligned and the joints are joined by bolts and nuts to assemble the structure portion 53. FIG. 27 shows an example in which the structure portion 53 including the transport unit 13 is assembled. When the structure portion 53 is assembled, various accessories are installed in the structure portion 53. For example, an accessory device such as a horizontal maintenance mechanism 40 installed inside is assembled to the transport unit 13.

The structure portion 53 is once assembled to a predetermined size. In the example of FIG. 27, the structure portion 53 composed of the sub-assembly blocks 50 for 5 blocks is assembled. The size of the structure portion 53 is not limited to 5 blocks, and is appropriately set in consideration of workability, the size of the starting base 4, and the like.

<Step S3: Step of moving the structure portion in the circumferential direction>
When the structure portion 53 is assembled to a predetermined size, the assembled structure portion 53 is moved from the assembly site 62 in the circumferential direction (C direction) by the rotation drive mechanism 30 installed in advance on the inner surface of the skeleton wall 4a of the starting base 4. The process of moving to is carried out.

As shown in FIG. 28, the assembled structure portion 53 is moved in the circumferential direction by the rotation drive mechanism 30 and temporarily placed on one side (left side in the drawing). The structure portion 53 is moved in the circumferential direction to a position that does not interfere with the assembly work at the assembly site 62. For example, the structure portion 53 is temporarily placed at a position separated from the assembly site 62 in the circumferential direction, and is temporarily fixed to maintain the position.

<Step S4: Step of joining the structure portion in the circumferential direction>
Next, in the starting base 4, a step of joining the structure portion 53 moved in the circumferential direction and the structure portion 53 of the assembly site 62 in the circumferential direction is performed.

First, as shown in FIG. 28, a structure portion 53 having a predetermined size (for example, 5 blocks) is assembled at the assembly site 62 by the same operation as steps S1 to S3, and the rotary drive mechanism 30 is moved in the circumferential direction. Temporarily placed on the other side (on the right side in the figure, see the alternate long and short dash line).

Next, as shown in FIG. 29, the temporarily placed structure portions 53 on both the left and right sides are moved to the lower portion (assembly site 62), and the joint portions of the respective structure portions 53 are joined with bolts and nuts. .. As a result, the structure portion 53 for 10 blocks is assembled.

In the present embodiment, the rotating structure 10 is assembled by repeating the above steps S1 to S4.

For example, as shown in FIG. 30, after the structure portion 53 for 10 blocks is temporarily placed on one side (left side in the figure), the structure portion 53 for 6 blocks is assembled by steps S1 to S3, and the other. Temporarily placed in the space on the side (right side in the figure). In step S4, each structure portion 53 is joined to form a total of 16 blocks of structure portion 53. As described above, in the present embodiment, by repeating steps S1 to S4, the structure portions 53 are connected in the circumferential direction and assembled in the circumferential direction.

As shown in FIG. 31, by repeating the steps S1 to S4, for example, the structure portion 53 up to 22 blocks out of all 24 blocks is assembled. For example, the structure portion 53 is assembled until the space of the space portion in which the sub-assembly block 50 has not been assembled becomes smaller than the space required for carrying the sub-assembly block 50 into the assembly site 62. After that, the final assembly is carried out.

To assemble the final 2 blocks. The assembly portion in the first tunnel 1 is moved to the assembly site 62 below the starting base 4, and the final sub-assembly block 50 is assembled to the structure portion 53. In this final assembly, for example, the individual constituent members 51 may be assembled to the starting base 4. As described above, the assembly of the rotating structure 10 is completed.

(Effect of the assembly method of this embodiment)
The following effects can be obtained by the assembly method of the present embodiment.

In the present embodiment (see FIGS. 26 to 31), as described above, when assembling the rotating structure 10 of the transport device 100, the rotating structure 10 installs the sub-assembly block 50 in which the rotating structure 10 is divided. The step of assembling the structure portion 53 by carrying it into the assembly site 62 inside the starting base 4 from the first tunnel 1 (step S2) and the rotation drive mechanism 30 installed in advance on the inner surface of the skeleton wall 4a of the starting base 4. The step (step S3) of moving the assembled structure portion 53 from the assembly site 62 in the circumferential direction (C direction), the structure portion 53 moved in the circumferential direction in the starting base 4, and the assembly site. The step of joining the structure portion 53 of 62 in the circumferential direction (step S4) is repeated. As a result, when the structure portion 53 forming a part of the rotating structure 10 is assembled at the assembly site 62 inside the starting base 4, the structure portion 53 is moved in the circumferential direction and then assembled separately. It is joined to the structure portion 53 of the above in the circumferential direction. That is, the rotating structure 10 is assembled by extending the structure portion 53 along the circumferential direction. As a result, unlike the general construction method in which the rotating structure 10 is assembled in order from the lower part to the upper part, the assembly work position of the structure portion 53 can be fixed to the assembly site 62 inside the starting base 4. Therefore, the rotating structure 10 can be efficiently assembled in the starting base 4 where the work space is limited.

Further, in the present embodiment (see FIGS. 23 and 26), as described above, the sub-assembly block 50 is placed in the first tunnel 1 from the constituent members 51 in which the sub-assembly block 50 is divided within the dimension range that can be transported by road. The step of assembling in (step S1) is further provided. As a result, the component 51 can be transported by road without special permission, so that the preparation process such as material transportation can be facilitated even when a huge structure such as the rotating structure 10 is constructed. Further, even when the sub-assembly block 50 is transported in units of 51 divided components, the sub-assembly block 50 is assembled at the assembly site 62 inside the starting base 4 by assembling the sub-assembly block 50 in the first tunnel 1. There is no need to do so, and the rotating structure 10 can be smoothly assembled in the starting base 4.

[Modification example]
The embodiments disclosed this time should be considered as exemplary in all respects and not restrictive. The scope of the present invention is shown not by the description of the above embodiment but by the scope of claims, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

For example, in the above embodiment, the first tunnel 1 shows one example, but the present invention is not limited to this. In the present invention, the first tunnel may be a plurality of tunnels.

Further, in the above embodiment, an example of carrying out the step of assembling the sub-assembly block 50 from the constituent member 51 (step S1) in the first tunnel 1 is shown, but the present invention is not limited to this. In the present invention, the constituent member 51 may be thrown into the assembly site 62, and the sub-assembly block 50 may be assembled at the assembly site 62 inside the starting base 4.

Further, in the above embodiment, an example in which the posture adjusting unit 45 is provided in the horizontal maintenance mechanism 40 is shown, but the present invention is not limited to this. In the present invention, it is not necessary to provide the posture adjusting unit. Further, when the posture adjusting unit is provided, only one of the yaw direction Qy (see FIG. 20) and the pitch direction Qp (see FIG. 17) may be prepared, and the position adjustment by translation may not be possible. ..

Further, in the above embodiment, an example in which the rotary drive mechanism 30 is provided with the operating member 32 and the switching cylinder 33 is shown, but the present invention is not limited to this. In the present invention, a configuration other than the operating member 32 and the switching cylinder 33 may be adopted as long as the rotation drive mechanism 30 can switch between a state in which it engages with the rotation structure 10 and a state in which it does not engage.

Further, in the above embodiment, the drive hydraulic cylinder 31 of the first drive set DA and the drive hydraulic cylinder 31 of the second drive set DB are alternately driven to continuously move the rotating structure 10. Although an example is shown, the present invention is not limited to this. In the present invention, the rotating structure 10 may be driven intermittently by a single drive set.

Further, in the above embodiment, the configuration in which the shield machine 5 is used as an example of the excavator is shown, but the present invention is not limited to this. In the present invention, any excavator may be transported.

1 1st tunnel 2 2nd tunnel 3 Transport 4 Start base (underground structure)
4a Frame wall 5 Shielding machine (excavator, transported object)
6 Materials and equipment (transported goods)
10 Rotating structure 11 Outer frame 12 Inner frame 13 Conveying unit 14 Contact part 20 Rotating support mechanism 21 Support roller 22 Roller holding part 23 Roller support base 30 Rotation drive mechanism 31 Drive hydraulic cylinder (hydraulic cylinder)
32 Acting member 33 Switching cylinder 40 Horizontal maintenance mechanism 41 Arc-shaped mount 45 Posture adjustment part 50 Sub assembly blocks 51, 51a, 51b Components 53 Structure part 62 Assembly site (loading position)
100 Conveying device 101 Conveying device for shield machine (conveying device)
102 Transport equipment for materials and equipment (conveyor equipment)
DA 1st drive set DB 2nd drive set

Claims (9)

An excavator used to construct a plurality of second tunnels on the outer circumference of the first tunnel and a transport device for transporting materials and equipment necessary for excavation as a transport object.
An annular outer frame provided apart from the outer surface of the first tunnel, an annular inner frame inside the outer frame and adjacent to the outer surface of the first tunnel, and the outer frame. A plurality of rotating structures including a plurality of cylindrical transport units installed between the frame and the inner frame and capable of holding the transported object, respectively.
A plurality of supports which are installed between the inner surface of the skeleton wall of the underground structure in which the plurality of rotating structures are installed and the rotating structure, and each of which is in contact with the skeleton wall or the rotating structure. A rotary support mechanism that provides the rollers so that they can swing according to the curvature of the contact surface and rotatably supports the rotary structure in the circumferential direction.
A plurality of hydraulic cylinder type rotary drive mechanisms are installed on the inner surface of the skeleton wall of the underground structure in which the rotary structure is installed, and the rotary structure is rotationally driven in the circumferential direction .
The rotating structure has a plurality of abutting portions arranged at intervals on the entire circumference in the circumferential direction on the outer peripheral portion of the rotating structure.
The rotary drive mechanism includes a hydraulic cylinder arranged on the inner surface of the skeleton wall in the circumferential direction, and a columnar operating member and a switching cylinder provided at the tip of the hydraulic cylinder.
The operating member is rotatably provided so as to stand up at an engaging position in contact with the abutting portion and fall to a release position not in contact with the abutting portion.
The switching cylinder is a transport device that rotates the operating member so that the operating member is arranged at the engaging position when driven and the operating member is arranged at the released position when not driven. The plurality of rotary support mechanisms are installed on the outer peripheral portion of the rotary structure, respectively, and are integrated with the rotary structure while swinging the plurality of support rollers with respect to the inner surface of the skeleton wall of the underground structure. The transport device according to claim 1, which is configured to be able to travel in the circumferential direction. The plurality of rotary support mechanisms are installed in the lower part of the inner surface of the skeleton wall of the underground structure, and the rotary structure is rotated in the circumferential direction via the plurality of support rollers that come into contact with the outer peripheral portion of the rotary structure. The transport device according to claim 1, which is rotatably supported. The rotation support mechanism is
With the pair of the support rollers
A roller holding portion that holds the pair of support rollers at intervals in the circumferential direction,
The invention according to any one of claims 1 to 3, further comprising a roller support base that is located between the pair of support rollers and supports the roller holding portion around a swing axis parallel to the axle direction of the support rollers. Conveyor device. The rotary drive mechanism includes a first drive set and a second drive set each composed of one or more of the hydraulic cylinders, and the drive of the first drive set by the hydraulic cylinder and the drive of the second drive set. The transport device according to any one of claims 1 to 4, which is configured to alternately drive with a hydraulic cylinder. The rotating structure includes a horizontal maintenance mechanism including an arcuate pedestal arranged so as to be relatively rotatable in a roll direction around the horizontal central axis of the cylindrical transport unit.
The horizontal maintenance mechanism can adjust the attitude of the transported object in at least one of the yaw direction around the vertical axis orthogonal to the axial direction of the transport unit and the pitch direction around the central axis and the horizontal axis orthogonal to the vertical axis. The transport device according to any one of claims 1 to 5 , which has a posture adjusting unit. The transport device according to claim 6 , wherein the posture adjusting unit is configured so that the position can be adjusted by moving the arc-shaped mount in parallel in the vertical axis direction and the horizontal axis direction inside the transport unit. .. The method for assembling the rotating structure in the transport device according to any one of claims 1 to 7.
A step of carrying the sub-assembly block in which the rotating structure is divided from the first tunnel into a loading position inside the underground structure where the rotating structure is installed to assemble the structure portion.
A step of moving the assembled structure portion in the circumferential direction from the loading position by the rotation drive mechanism installed in advance on the inner surface of the skeleton wall of the underground structure.
In the underground structure, a step of joining the structure portion moved in the circumferential direction and the structure portion at the loading position in the circumferential direction.
A method of assembling a rotating structure, which assembles the rotating structure by repeating the above. The method for assembling a rotating structure according to claim 8 , further comprising a step of assembling the sub-assembly block in the first tunnel from a component member obtained by dividing the sub-assembly block within a dimension range that can be transported by road.

Images