Connecting member, wheel unit structure, method of transporting wheel unit structure, method of constructing concrete form apparatus, and method of disassembling concrete form apparatus

Abstract

To provide a connecting member, a wheel unit structure, a conveying method of the wheel unit structure, a construction method of a concrete form device, and a demolition method of the concrete form device capable of improving convenience in handling the concrete form device.SOLUTION: The coupling member includes a main body portion extending in a first direction intersecting a vertical direction, first coupling portions respectively coupled to a pair of wheel units in the concrete form apparatus at both end portions of the main body portion, and a rotation portion that rotates the first coupling portions about an axis along the vertical direction with respect to the main body portion. In a state in which the pair of wheel units is connected to the first connection section, the first connection section is movable between a first position at which the pair of wheel units is disposed along a first direction and a second position at which the pair of wheel units is disposed along a second direction that intersects the first direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a connecting member, a wheel unit structure, a method for transporting a wheel unit structure, a method for constructing a concrete formwork device, and a method for dismantling a concrete formwork device. [Background technology]

[0002] For example, Patent Document 1 discloses a construction method for efficiently pouring tunnel lining concrete using a concrete formwork device. This concrete formwork device includes a gantry and a plurality of forms supported by the gantry. The gantry includes a pair of wheel units, a pair of side wall units, and girders.

[0003] The pair of wheel units are installed on the pair of rails at the tunnel construction site, and then the pair of side wall units and girders are attached to the upper portions of the pair of wheel units. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-209657 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when using such a concrete formwork device, it is desired to improve the convenience of handling the concrete formwork device. [Means for solving the problem]

[0006] A connecting member that solves the above problem comprises a main body portion extending in a first direction that intersects the vertical direction, first connecting portions at both ends of the main body portion that are respectively connected to a pair of wheel units in a concrete formwork device, and a rotating portion that rotates the first connecting portion relative to the main body portion around an axis along the vertical direction, and the first connecting portion is displaceable between a first position in which the pair of wheel units are each arranged along the first direction and a second position in which the pair of wheel units are each arranged along a second direction that intersects the first direction when the pair of wheel units are each connected.

[0007] A wheel unit structure that solves the above problem comprises a pair of wheel units in a concrete formwork device, a main body extending in a first direction that intersects the vertical direction, first connecting portions that are respectively connected to the pair of wheel units at both ends of the main body, and a rotating portion that rotates the first connecting portions relative to the main body about an axis along the vertical direction, and the first connecting portions are displaceable between a first position in which the pair of wheel units are each arranged along the first direction and a second position in which the pair of wheel units are each arranged along a second direction that intersects the first direction when the pair of wheel units are each connected.

[0008] A method for transporting a wheel unit structure that solves the above problem includes a pair of wheel units in a concrete formwork device, a main body extending in a first direction intersecting the vertical direction, first connecting portions connected to the pair of wheel units at both ends of the main body, and a rotating portion that rotates the first connecting portions relative to the main body around an axis along the vertical direction, in which the wheel unit structure is transported to a tunnel construction site with the pair of wheel units each connected to the first connecting portions, and with the first connecting portions positioned at first positions where the pair of wheel units are each positioned along the first direction, and with the wheel unit structure loaded on the truck bed so that the first direction is along the fore-and-aft direction of the truck bed.

[0009] A method for constructing a concrete formwork device that solves the above-mentioned problem is a method for constructing a concrete formwork device using a wheel unit structure comprising a pair of wheel units in the concrete formwork device, a main body extending in a first direction intersecting the vertical direction, first connecting portions connected to the pair of wheel units at both ends of the main body, and rotating portions that rotate the first connecting portions relative to the main body around axes along the vertical direction, the method comprising the steps of: lifting the wheel unit structure, in which the pair of wheel units are each connected to the first connecting portions and the first connecting portions are arranged at first positions where the pair of wheel units are each arranged along the first direction, from the bed of a truck at a tunnel construction site; displacing the first connecting portions to second positions where the pair of wheel units are each arranged along a second direction intersecting the first direction; and installing the pair of wheel units on a pair of rails provided at the tunnel construction site with the first connecting portions arranged at the second positions.

[0010] A method for dismantling a concrete formwork device that solves the above-mentioned problem is a method for dismantling a concrete formwork device that uses a wheel unit structure including a pair of wheel units in the concrete formwork device, a main body extending in a first direction that intersects the vertical direction, first connecting parts that are respectively connected to the pair of wheel units at both ends of the main body, and a rotating part that rotates the first connecting parts relative to the main body about an axis along the vertical direction, the method includes: lifting the pair of wheel units, each connected to the first connecting parts, from a pair of rails installed at a tunnel construction site, with the pair of wheel units each connected to the first connecting parts and the first connecting parts positioned at second positions along a second direction that intersects the first direction; displacing the first connecting parts to first positions where the pair of wheel units are each positioned along the first direction; and installing the pair of wheel units, with the first connecting parts positioned at the first positions, on the bed of a truck at the tunnel construction site. [Effects of the Invention]

[0011] According to the present invention, it is possible to improve the convenience of handling the concrete formwork device. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram showing a concrete formwork device of the first embodiment. [Figure 2] FIG. 2 is a perspective view showing the wheel unit structure of the first embodiment. [Figure 3] FIG. 3 is a top view showing the wheel unit structure of the first embodiment. [Figure 4] FIG. 4 is a perspective view showing the wheel unit structure of the first embodiment. [Figure 5] FIG. 5 is a perspective view showing the wheel unit structure of the first embodiment. [Figure 6] FIG. 6 is a top view showing the wheel unit structure of the first embodiment. [Figure 7] FIG. 7 is a perspective view showing the wheel unit structure of the first embodiment. [Figure 8] FIG. 8 is a flowchart showing the construction process of the first embodiment. [Figure 9] FIG. 9 is a perspective view showing the wheel unit structure loaded on the bed of the truck of the first embodiment. [Figure 10] FIG. 10 is a top view showing the wheel unit structure loaded on the bed of the truck according to the first embodiment. [Figure 11] FIG. 11 is a schematic view showing the concrete formwork device of the first embodiment. [Figure 12] FIG. 12 is a schematic view showing the concrete formwork device of the first embodiment. [Figure 13] FIG. 13 is a schematic view showing the concrete formwork device of the first embodiment. [Figure 14] FIG. 14 is a schematic view showing the concrete formwork device of the first embodiment. [Figure 15]FIG. 15 is a flowchart showing the disassembly process of the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] [First embodiment] Hereinafter, an embodiment of a connecting member, a wheel unit structure, a method for transporting a wheel unit structure, a method for constructing a concrete formwork device, and a method for dismantling a concrete formwork device will be described. Hereinafter, the concrete formwork device will be simply referred to as a formwork device.

[0014] <Formwork device 10> As shown in Fig. 1, the formwork device 10 is used to provide lining concrete C on the inner surface of a tunnel T. Hereinafter, the direction that is the width of the tunnel T will be referred to as the width direction X, and the direction in which the tunnel T extends will be referred to as the extension direction Y.

[0015] The formwork device 10 includes a gantry 11 and a plurality of forms 12. The gantry 11 is portal-shaped. The gantry 11 may also be arch-shaped. The gantry 11 is configured to support the plurality of forms 12. The gantry 11 is supported on a pair of rails R. The pair of rails R are provided on the ground of the tunnel T.

[0016] The multiple forms 12 are supported by the gantry 11 so as to form an arch shape. Fresh concrete is poured between the outer surfaces of the multiple forms 12 and the inner surface of the tunnel T to form the lining concrete C.

[0017] The gantry 11 includes wheel units 21, side wall units 13, and girder members 14. That is, the formwork device 10 includes wheel units 21, side wall units 13, and girder members 14. The gantry 11 may include a pair of wheel units 21 in the width direction X. The gantry 11 may include wheel units 21 at the four corners in the width direction X and the extension direction Y. That is, the gantry 11 may include a pair of wheel units 21 for the front wheels and a pair of wheel units 21 for the rear wheels. The gantry 11 may include a pair of side wall units 13 in the width direction X.

[0018] The wheel unit 21 includes a support leg 22 and a wheel 23. The support leg 22 is configured to support the side wall unit 13. The support leg 22 houses the wheel 23 so that the wheel 23 is exposed from below. The wheel 23 is supported on the rail R in a state where it is exposed from below the support leg 22. The wheel unit 21 may include a drive unit that drives the wheel 23. The drive unit may be a motor.

[0019] The side wall unit 13 is supported by the support legs 22. The side wall unit 13 is assembled above the front wheel unit 21 and the rear wheel unit 21 so as to straddle the front wheel unit 21 and the rear wheel unit 21. Such a side wall unit 13 corresponds to an example of an assembled member.

[0020] The side wall unit 13 may include a side wall main body 13A, an internal stay 13B, and an external stay 13C. The internal stay 13B is supported by the side wall main body 13A so as to protrude inward in the width direction X from the side wall main body 13A. The external stay 13C is supported by the side wall main body 13A so as to protrude outward in the width direction X from the side wall main body 13A. The internal stay 13B and the external stay 13C may be foldable relative to the side wall main body 13A. The internal stay 13B and the external stay 13C may be detachable from the side wall main body 13A.

[0021] The girder 14 is supported by a pair of side wall units 13. The girder 14 is installed between the upper ends of the pair of side wall units 13. The girder 14 is assembled above the pair of side wall units 13. In other words, the girder 14 is assembled above the pair of wheel units 21. The girder 14 may be made of H-shaped steel. The girder 14 supports the top form 12A.

[0022] <Wheel unit structure 20> 2 to 7, in this embodiment, a pair of wheel units 21 are treated as a wheel unit structure 20. The wheel unit structure 20 includes a pair of wheel units 21 and a connecting member 30. The wheel unit structure 20 may include a support member 40. In the following description, a direction intersecting with the vertical direction Z is referred to as a first direction A, and a direction intersecting with the vertical direction Z and the first direction A is referred to as a second direction B.

[0023] The support members 40 are configured to support the pair of wheel units 21 from below, respectively. The support members 40 may be configured to support the pair of wheel units 21, respectively, so that the wheels 23 do not come into contact with the ground. The support members 40 are connected to the pair of wheel units 21, respectively.

[0024] The support member 40 has standing legs for maintaining the pair of wheel units 21 in an upright state. The standing legs may be displaceable along the vertical direction Z. Displacement of the standing legs along the vertical direction Z allows the pair of wheel units 21 to move up and down.

[0025] The connecting member 30 is configured to support the pair of wheel units 21 by connecting the pair of wheel units 21 in the first direction A. This makes it easy to handle the pair of wheel units 21.

[0026] The connecting member 30 includes a main body portion 31, a first connecting portion 32, and a rotating portion 33. The connecting member 30 may include a main body portion 31, a pair of first connecting portions 32, and a pair of rotating portions 33.

[0027] The main body 31 extends in a first direction A. The main body 31 has an end surface 31A shown in FIGS. 5 to 7. The end surface 31A faces the first direction A. The end surface 31A may be a surface onto which a high-strength bolt can be screwed. The main body 31 is configured not to come into contact with the ground, but may have an abutment portion that comes into contact with the ground.

[0028] 2 to 7, the main body 31 may include a second connecting portion 34. The main body 31 may include a pair of second connecting portions 34. The second connecting portions 34 are provided on the upper surface of the main body 31. The second connecting portions 34 are provided in the center of the main body 31 in the first direction A.

[0029] The second connecting portion 34 can be connected to a support member 50 shown in Figures 12 and 13. The support member 50 is a member for maintaining the posture of the pair of side wall units 13 by connecting the connecting member 30 to a pair of side wall units 13, each assembled above the pair of wheel units 21. The support member 50 may be connected to the internal stays 13B of the pair of side wall units 13. In this way, the second connecting portion 34 can be connected to a pair of side wall units 13 assembled above the pair of wheel units 21. The second connecting portion 34 can also connect a clamp attached to a wire when lifting and lowering the wheel unit structure 20.

[0030] As shown in Figures 2 to 7, a pair of first connecting portions 32 are provided at both ends of the main body portion 31. The pair of first connecting portions 32 are respectively connected to a pair of wheel units 21. The first connecting portion 32 has an end surface 32A shown in Figures 5 to 7. The end surface 32A faces the second direction B in Figures 5 to 7. The end surface 32A may be a surface onto which a high-strength bolt can be screwed.

[0031] As shown in FIGS. 2 to 7, the pair of rotating parts 33 are provided at both ends of the main body part 31. The pair of rotating parts 33 are configured to respectively connect the main body part 31 and the pair of first connecting parts 32. The pair of rotating parts 33 are configured to rotate the first connecting parts 32 relative to the main body part 31 about an axis along the vertical direction Z. The pair of rotating parts 33 are configured to rotate the pair of first connecting parts 32 in the same direction in the second direction B of the main body part 31. The rotating parts 33 may be hinges.

[0032] In this way, the pair of first connecting portions 32 are displaceable in a state in which the pair of wheel units 21 are respectively connected. In particular, the pair of first connecting portions 32 are displaceable between a first position P1 shown in Figures 5 to 7 and a second position P2 shown in Figures 2 to 4 in a state in which the pair of wheel units 21 are respectively connected.

[0033] 2 to 4, the second position P2 is a position used when installing a pair of wheel units 21 on a pair of rails R. The second position P2 is a position where the pair of wheel units 21 are arranged along the second direction B in a state where the pair of wheel units 21 are coupled to each other.

[0034] 5 to 7, the first position P1 is a position used when transporting the pair of wheel units 21. The first position P1 is a position where the pair of wheel units 21 are connected to each other and are arranged along the first direction A. In particular, when the pair of first connecting portions 32 are arranged at the first position P1, the pair of wheel units 21 are arranged on the same side of the main body portion 31 in the second direction B.

[0035] 7, when the first connecting portion 32 is disposed at the first position P1, the end surface 32A of the first connecting portion 32 faces the second direction B. In this state, the fixing member 51 is fixed to the main body 31 and the first connecting portion 32 by a high-strength bolt (not shown). The fixing member 51 is L-shaped in a plan view.

[0036] In this way, by fixing the main body portion 31 and the first connecting portions 32, the first connecting portions 32 are fixed to the main body portion 31 at the second position P2. In other words, the pair of first connecting portions 32 can be fixed to the main body portion 31 when disposed at the first position P1.

[0037] 4, when the first connecting portions 32 are disposed at the second position P2, the end faces 31A and 32A face each other along the first direction A. In this state, the main body 31 and the first connecting portions 32 are fixed together by high-strength bolts (not shown). By fixing the main body 31 and the first connecting portions 32 together in this manner, the first connecting portions 32 are fixed to the main body 31 at the second position P2. In other words, the pair of first connecting portions 32 can be fixed to the main body 31 when disposed at the second position P2.

[0038] As shown in Figs. 2 to 7, the wheel unit structure 20 may include a support member 35. The support member 35 is connected to the connecting member 30 and the support member 40. More specifically, the support member 35 is connected to the first connecting portion 32 and the support member 40. The support member 35 is a member for maintaining the pair of wheel units 21 in an upright position.

[0039] <Construction process> The construction process will now be described with reference to Figures 8 to 14. For example, the construction process is a process of transporting the formwork device 10 from its source to the construction site of tunnel T, and constructing the formwork device 10 at the construction site of tunnel T. The construction process is included in the handling of the formwork device 10.

[0040] 8, in step S11, a connecting step is performed at the transport source. The connecting step is a step of connecting a pair of wheel units 21 to the connecting member 30. In this way, the wheel unit structure 20 is formed.

[0041] In detail, the connecting process is a process of connecting a pair of wheel units 21 to the support member 40, connecting a pair of wheel units 21 to the first connecting portion 32, and connecting a support member 35 to the first connecting portion 32 and the support member 40.

[0042] In such a case, the pair of wheel units 21 and the first connecting portion 32 may be respectively connected to each other with the first connecting portion 32 disposed at the first position P1 and with the main body 31 and the first connecting portion 32 fixed by the fixing member 51. After the pair of wheel units 21 and the first connecting portion 32 are respectively connected to each other, the first connecting portion 32 may be displaced to the first position P1, and the main body 31 and the first connecting portion 32 may be fixed by the fixing member 51.

[0043] In step S12, a loading process is performed. The loading process is a process of loading the wheel unit structure 20 onto the bed 61 of the truck 60 shown in Figures 9 and 10. In this case, as shown in Figures 9 and 10, the wheel unit structure 20 is loaded onto the bed 61 of the truck 60 with the pair of first connecting portions 32 disposed at the first position P1.

[0044] In particular, the wheel unit structure 20 is loaded onto the bed 61 of the truck 60 so that the first direction A of the wheel unit structure 20 is aligned with the fore-and-aft direction of the bed 61 of the truck 60. The first direction A is the longitudinal direction of the wheel unit structure 20. The fore-and-aft direction of the bed 61 of the truck 60 is the longitudinal direction of the bed 61 of the truck 60. In this embodiment, the wheel unit structure 20 for the front wheels equipped with a drive unit and the wheel unit structure 20 for the rear wheels equipped with a drive unit can be loaded onto the bed 61 of the truck 60 so as to be aligned in the vehicle width direction which intersects with the fore-and-aft direction. In the bed 61 of the truck 60, a space for transporting components can be provided in addition to the wheel unit structure 20 for the front wheels equipped with a drive unit and the wheel unit structure 20 for the rear wheels equipped with a drive unit.

[0045] 8, a transportation process is performed. The transportation process is a process of transporting the wheel unit structure 20 from the transportation source to the construction site of the tunnel T using a truck 60. In this way, the wheel unit structure 20 is transported from the transportation source to the construction site of the tunnel T with the pair of wheel units 21 each connected to the first connecting portion 32 arranged at the first position P1, and with the wheel unit structure 20 loaded so that the first direction A is along the fore-and-aft direction of the loading platform 61 of the truck 60.

[0046] In step S14, a lifting process is performed. The lifting process is a process of lifting the wheel unit structure 20 from the bed 61 of the truck 60 with the first connecting portion 32 disposed at the first position P1. A crane may be used for the lifting. In the lifting process, the wheel unit structure 20 may be lifted with a clamp attached to a wire connected to the second connecting portion 34. In the lifting process, the clamp attached to the wire may be sling-hooked at another position and the wheel unit structure 20 may be lifted.

[0047] In step S15, a displacement step is performed. In the displacement step, after removing the fixing member 51, the pair of first connecting portions 32 are displaced from the first position P1 to the second position P2, and the main body 31 and the pair of first connecting portions 32 are fixed by screwing them together. This causes the pair of wheel units 21 to extend in the second direction B.

[0048] In step S16, a wheel unit installation process is performed. As shown in Fig. 11, the wheel unit installation process is a process of installing the wheel unit structure 20 lifted by a crane on the rail R with the first connecting portion 32 disposed at the second position P2. In this case, the wheel unit structure 20 may be supported by a support member 40. To configure the formwork apparatus 10, at least a wheel unit structure 20 for the front wheels and a wheel unit structure 20 for the rear wheels are installed.

[0049] In step S17 of Fig. 8, a side wall unit assembling process is performed. As shown in Fig. 12, the side wall unit installation process is a process in which a pair of side wall units 13 transported to the construction site of tunnel T is lifted by a crane, and the pair of side wall units 13 is installed and assembled on the wheel unit structures 20. The pair of side wall units 13 may be assembled so as to straddle the wheel unit structures 20 for the front wheels and the wheel unit structures 20 for the rear wheels, respectively. Thereafter, a support member 50 is connected to the pair of side wall units 13 and the second connecting portion 34.

[0050] The girder assembly process is performed in step S18 of Fig. 8. As shown in Fig. 13, the girder assembly process is a process in which the girder 14 transported to the construction site of the tunnel T is lifted by a crane, and the girder 14 is placed on and assembled onto a pair of side wall units 13. In the girder assembly process, multiple girder 14 may be assembled onto the pair of side wall units 13.

[0051] In step S19 of Fig. 8, a disconnection process is performed. As shown in Fig. 14, the disconnection process is a process of removing the support member 50 from the side wall unit 13 and the second connecting portion 34, removing the support member 35 from the wheel unit structure 20, and removing the connecting member 30 and the support member 40 from the pair of wheel units 21. In this way, the gantry 11 is constructed. Thereafter, a plurality of forms 12 are assembled to the gantry 11, and the formwork device 10 is constructed.

[0052] <Demolition process> Next, the dismantling process will be described with reference to Figure 15. The dismantling process is a process that is generally carried out in the reverse order of the construction process. For example, the dismantling process is a process of dismantling the formwork device 10 that was constructed at the construction site of tunnel T, and transporting the formwork device 10 from the construction site of tunnel T to its source. The dismantling process is included in the handling of the formwork device 10.

[0053] As shown in Figure 15, a connecting process is performed in step S21. The connecting process is performed after a plurality of forms 12 have been removed from the formwork device 10 at the construction site of the tunnel T. As shown in Figure 13, the connecting process is a process of connecting the connecting members 30 and the support members 40 to the pair of wheel units 21, connecting the support members 35 to the connecting members 30 and the support members 40, and connecting the support members 50 to the side wall unit 13 and the second connecting portions 34. In this case, the pair of first connecting portions 32 are fixed to the main body portion 31 while being disposed at the second position P2. In this way, the wheel unit structure 20 is configured.

[0054] In step S22 of Fig. 15, a girder dismantling process is performed. As shown in Fig. 12, the girder dismantling process is a process of removing the girder 14 from the pair of side wall units 13 and lifting the girder 14 with a crane. In this way, the girder 14 is dismantled.

[0055] In step S23 of Fig. 15, a side wall unit dismantling process is performed. As shown in Fig. 11, the side wall unit dismantling process is a process of removing the support members 50 from the side wall units 13 and the second connecting portions 34, removing the pair of side wall units 13 from the wheel unit structure 20, and lifting the pair of side wall units 13 with a crane. In this way, the pair of side wall units 13 are dismantled.

[0056] A lifting step is performed in step S24 of Fig. 15. The lifting step is a step in which the wheel unit structure 20 is lifted from the pair of rails R in a state in which the first connecting portion 32 is disposed at the second position P2.

[0057] In step S25, a displacement step is performed. The displacement step is a step of releasing the fixation between the main body 31 and the pair of first connecting portions 32, displacing each of the pair of first connecting portions 32 to a first position P1, and then fixing the main body 31 and the pair of first connecting portions 32 with the fixing members 51. This causes the pair of wheel units 21 to extend in the first direction A.

[0058] In step S26, a loading process is performed. The loading process is a process of loading the wheel unit structure 20 onto the bed 61 of the truck 60 shown in Figures 9 and 10 at the construction site of the tunnel T, with the first coupling portion 32 disposed at the first position P1, similar to step S12.

[0059] 15, a transportation process is performed. The transportation process is a process of transporting the wheel unit structure 20 from the construction site of the tunnel T to the transportation origin using a truck 60. In this way, the wheel unit structure 20 is transported from the construction site of the tunnel T to the transportation origin in a state where the pair of wheel units 21 are each connected to the first connecting portion 32 arranged at the first position P1, and the wheel unit structure 20 is loaded so that the first direction A is along the fore-and-aft direction of the loading platform 61 of the truck 60.

[0060] In step S28, a loading / unloading process is performed. The loading / unloading process is a process of unloading the wheel unit structure 20 from the bed 61 of the truck 60 in a state where the first connecting portion 32 is arranged at the first position P1 at the transport source.

[0061] In step S29, a disconnection step is performed. The disconnection step is a step of removing the support member 35 from the wheel unit structure 20, and removing the connecting member 30 and the support member 40 from the pair of wheel units 21.

[0062] <Actions and Effects of the First Embodiment> The operation and effects of the first embodiment will be described. (1) The connecting member 30 includes a main body portion 31 extending in a first direction A, first connecting portions 32 connected to the pair of wheel units 21 at both ends of the main body portion 31, and a rotating portion 33 that rotates the first connecting portion 32 relative to the main body portion 31 about an axis along the vertical direction Z. The first connecting portion 32 is displaceable between a first position P1 and a second position P2 when the pair of wheel units 21 are connected to each other. The first position P1 is a position where the pair of wheel units 21 are arranged along the first direction A. The second position P2 is a position where the pair of wheel units 21 are arranged along the second direction B.

[0063] According to this configuration, the pair of wheel units 21 can be connected to the connecting members 30 at the transport source. Then, if the first connecting parts 32 are disposed at the first position P1, the pair of wheel units 21 can be transported by truck 60 from the transport source to the construction site of the tunnel T in a state where the pair of wheel units 21 are connected to the connecting members 30. This improves the transportability of the pair of wheel units 21. Therefore, the convenience of handling the formwork device 10 can be improved.

[0064] In addition, workability can be improved to prevent the pair of wheel units 21 from tipping over, and the work of connecting the pair of wheel units 21 does not have to be performed at the construction site of the tunnel T. This reduces the work time at the construction site of the tunnel T. Therefore, the convenience of handling the formwork device 10 can be improved.

[0065] (2) When the first connecting portion 32 is disposed at the first position P1, each of the pair of wheel units 21 is disposed on the same side in the second direction B relative to the main body portion 31. With this configuration, the pair of wheel units 21 can be transported more compactly by the truck 60. This improves the transportability of the pair of wheel units 21. Therefore, the convenience of handling the formwork device 10 can be improved.

[0066] (3) The first connecting portion 32 can be fixed to the main body portion 31 when disposed at the first position P1. The first connecting portion 32 can be fixed to the main body portion 31 when disposed at the second position P2. According to this configuration, by fixing the first connecting portion 32 and the main body portion 31 when the first connecting portion 32 is disposed at the first position P1, the pair of wheel units 21 can be transported stably. This improves the transportability of the pair of wheel units 21. Therefore, the convenience of handling the formwork apparatus 10 can be improved.

[0067] In addition, by fixing the first connecting portion 32 and the main body 31 together while the first connecting portion 32 is disposed at the first position P1 and the second position P2, the pair of wheel units 21 can be handled stably. This improves workability by preventing the pair of wheel units 21 from tipping over, thereby improving workability at the construction site of the tunnel T. Therefore, the convenience of handling the formwork device 10 can be improved.

[0068] (4) The main body 31 includes a second connecting portion 34 that can be connected to the side wall unit 13 that is assembled above the pair of wheel units 21 via the support member 50. This configuration prevents the pair of wheel units 21 from tipping over when assembling the side wall unit 13 and the girder 14 above the pair of wheel units 21, improving workability. Therefore, the formwork device 10 can be more easily handled.

[0069] In addition, when lifting the wheel unit structure 20, a clamp attached to the wire can be connected to the second connecting portion 34. This improves the workability of lifting the wheel unit structure 20. Therefore, the convenience of handling the formwork device 10 can be improved.

[0070] [Example of change] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0071] The fixing member 51 may be foldably connected to the connecting member 30. More specifically, the fixing member 51 may be foldably connected to the first connecting portion 32. The fixing member 51 may be foldably connected to the main body portion 31. In this manner, the connecting member 30 may include the fixing member 51.

[0072] The fixing member 51 does not have to fix the end surface 31A of the main body 31 to the end surface 32A of the first connecting portion 32. The fixing member 51 may fix the main body 31 to the pair of wheel units 21 when the first connecting portion 32 is disposed at the first position P1.

[0073] At the construction site of the tunnel T, the wheel unit structure 20 may be installed directly from the bed 61 of the truck 60 onto the pair of rails R. At the construction site of the tunnel T, the wheel unit structure 20 may be temporarily placed from the bed 61 of the truck 60 into a temporary placement area, and then the wheel unit structure 20 may be installed from the temporary placement area onto the pair of rails R.

[0074] The formwork apparatus 10 may be provided with another pair of wheel units 21 in addition to the pair of wheel units 21 for the front wheels and the pair of wheel units 21 for the rear wheels. The wheel units 21 may not be provided with a drive unit. If the wheel units 21 do not have a drive unit, the longitudinal length of the wheel units 21 will be shorter than if the wheel units 21 have a drive unit. When the pair of wheel units 21 do not have a drive unit, the first connecting portions 32 may be connected to the connecting members 30 arranged at the second position P2, and the wheel units 21 may be loaded onto the bed 61 of the truck 60.

[0075] The length of the main body portion 31 may be adjustable in the first direction A. The main body portion 31 may be separable into two or more parts in the first direction A. In other words, the connecting member 30 may include a pair of main body portions 31, a pair of first connecting portions 32, and a pair of rotating portions 33. The wheel unit structure 20 may be transported by the truck 60 in a state where the pair of wheel units 21, the pair of main body portions 31, the pair of first connecting portions 32, and the pair of rotating portions 33 are separated into two or more parts.

[0076] The phrase "at least any" used herein means one or more of the desired options. As an example, when the number of options is two, the phrase "at least any" used herein means only one option or both options. As another example, when the number of options is three or more, the phrase "at least any" used herein means only one option or any combination of two or more options.

[0077] [Note] The technical concepts and their effects that can be understood from the above-described embodiments and modifications will be described below. The technical concepts and their effects can be combined with each other to the extent that they are not technically inconsistent.

[0078] [1] The connecting member comprises a main body portion extending in a first direction intersecting the vertical direction, first connecting portions at both ends of the main body portion that are respectively connected to a pair of wheel units in a concrete formwork device, and a rotating portion that rotates the first connecting portion relative to the main body portion around an axis along the vertical direction, and the first connecting portions are displaceable between a first position in which the pair of wheel units are each arranged along the first direction and a second position in which the pair of wheel units are each arranged along a second direction intersecting the first direction when the pair of wheel units are each connected to each other.

[0079] [2] In the above-mentioned connecting member, when the first connecting portion is disposed at the first position, each of the pair of wheel units is disposed on the same side in the second direction relative to the main body portion. [3] In the above connecting member, the first connecting portion can be fixed to the main body portion when positioned at the first position, and can be fixed to the main body portion when positioned at the second position.

[0080] [4] In the above connecting member, the main body portion has a second connecting portion that can be connected to an assembly member that is assembled above the pair of wheel units. [5] The wheel unit structure comprises a pair of wheel units in a concrete formwork device, a main body extending in a first direction intersecting the vertical direction, first connecting portions connected to the pair of wheel units at both ends of the main body, and a rotating portion that rotates the first connecting portions relative to the main body about an axis along the vertical direction, and the first connecting portions are displaceable between a first position in which the pair of wheel units are each arranged along the first direction and a second position in which the pair of wheel units are each arranged along a second direction intersecting the first direction when the pair of wheel units are each connected to each other.

[0081] [6] A method for transporting a wheel unit structure comprising a pair of wheel units in a concrete formwork device, a main body extending in a first direction intersecting the vertical direction, first connecting portions connected to the pair of wheel units at both ends of the main body, and a rotating portion for rotating the first connecting portions relative to the main body around an axis along the vertical direction, wherein the wheel unit structure is transported to a tunnel construction site with the pair of wheel units each connected to the first connecting portions, and with the first connecting portions positioned at first positions where the pair of wheel units are each positioned along the first direction, and with the wheel unit structure loaded on the truck bed so that the first direction is along the fore-and-aft direction of the truck bed.

[0082] [7] A method for constructing a concrete formwork device using a wheel unit structure including a pair of wheel units in a concrete formwork device, a main body extending in a first direction intersecting the vertical direction, first connecting portions connected to the pair of wheel units at both ends of the main body, and rotating portions for rotating the first connecting portions relative to the main body about axes along the vertical direction, the method comprising the steps of: lifting the wheel unit structure, in which the pair of wheel units are each connected to the first connecting portions and the first connecting portions are arranged at first positions where the pair of wheel units are each arranged along the first direction, from the bed of a truck at a tunnel construction site; displacing the first connecting portions to second positions where the pair of wheel units are each arranged along a second direction intersecting the first direction; and installing the pair of wheel units on a pair of rails provided at the tunnel construction site with the first connecting portions arranged at the second positions.

[0083] [8] A method for dismantling a concrete formwork device using a wheel unit structure including a pair of wheel units in the concrete formwork device, a main body extending in a first direction intersecting the vertical direction, first connecting parts connected to the pair of wheel units at both ends of the main body, and a rotating part for rotating the first connecting parts relative to the main body about an axis along the vertical direction, the method comprising the steps of: lifting the pair of wheel units, each connected to the first connecting parts, from a pair of rails installed at a tunnel construction site, with the pair of wheel units connected to the first connecting parts and the first connecting parts positioned at second positions along a second direction intersecting the first direction; displacing the first connecting parts to first positions where the pair of wheel units are each positioned along the first direction; and installing the pair of wheel units, with the first connecting parts positioned at the first positions, on the bed of a truck at the tunnel construction site. [Explanation of symbols]

[0084] 10...formwork device, 11...gantry, 12...form, 13...side wall unit, 14...girder, 20...wheel unit structure, 21...wheel unit, 23...wheel, 30...connecting member, 31...main body, 32...first connecting portion, 33...rotating portion, 34...second connecting portion, 40...support member, 51...fixing member, 60...truck, 61...loading platform, A...first direction, B...second direction, P1...first position, P2...second position, R...rail, T...tunnel, X...width direction, Y...extension direction, Z...vertical direction.

Claims

1. a main body portion extending in a first direction intersecting the vertical direction; First connecting portions at both ends of the main body are respectively connected to a pair of wheel units of a concrete formwork device; a rotating unit that rotates the first connecting unit relative to the main body unit about an axis along the vertical direction, The first connecting portion is a connecting member that, when the pair of wheel units are connected to each other, can be displaced between a first position in which the pair of wheel units are each arranged along the first direction, and a second position in which the pair of wheel units are each arranged along a second direction that intersects the first direction.

2. The connecting member according to claim 1, A connecting member in which, when the first connecting portion is positioned at the first position, each of the pair of wheel units is positioned on the same side in the second direction relative to the main body portion.

3. The connecting member according to claim 2, The first connecting portion is a connecting member that can be fixed to the main body portion when disposed at the first position, and can be fixed to the main body portion when disposed at the second position.

4. The connecting member according to any one of claims 1 to 3, The main body portion is a connecting member having a second connecting portion that can be connected to an assembly member that is assembled above the pair of wheel units.

5. a pair of wheel units in the concrete formwork device; a main body portion extending in a first direction intersecting the vertical direction; a first coupling portion coupled to each of the pair of wheel units at both ends of the main body; a rotating unit that rotates the first connecting unit relative to the main body unit about an axis along the vertical direction, A wheel unit structure in which the first connecting portion is displaceable between a first position in which the pair of wheel units are each arranged along the first direction and a second position in which the pair of wheel units are each arranged along a second direction that intersects the first direction when the pair of wheel units are each connected.

6. a pair of wheel units in the concrete formwork device; a main body portion extending in a first direction intersecting the vertical direction; a first coupling portion coupled to each of the pair of wheel units at both ends of the main body; a rotating unit that rotates the first connecting portion relative to the main body portion about an axis along the vertical direction, A method for transporting a wheel unit structure, in which the wheel unit structure is transported to a tunnel construction site in a state in which the pair of wheel units are each connected to the first connecting portion, the first connecting portion is positioned at a first position in which the pair of wheel units are each positioned along the first direction, and the wheel unit structure is loaded on the bed of the truck so that the first direction is along the fore-and-aft direction of the bed of the truck.

7. a pair of wheel units in the concrete formwork device; a main body portion extending in a first direction intersecting the vertical direction; a first coupling portion coupled to each of the pair of wheel units at both ends of the main body; a rotating unit that rotates each of the first connecting portions relative to the main body portion about an axis along the vertical direction, Lifting the wheel unit structure, in which the pair of wheel units are each connected to the first connecting portion and the first connecting portion is disposed at a first position where the pair of wheel units are each disposed along the first direction, from a truck bed at a tunnel construction site; displacing the first coupling portion to a second position where each of the pair of wheel units is disposed along a second direction intersecting the first direction; and installing the pair of wheel units on a pair of rails provided at the tunnel construction site, respectively, with the first connecting portion positioned at the second position.

8. a pair of wheel units in the concrete formwork device; a main body portion extending in a first direction intersecting the vertical direction; a first coupling portion coupled to each of the pair of wheel units at both ends of the main body; a rotating unit that rotates the first connecting portion relative to the main body portion about an axis along the vertical direction, Lifting the pair of wheel units from a pair of rails installed at a tunnel construction site in a state where the pair of wheel units are each connected to the first connecting portion and the first connecting portion is arranged at a second position where the pair of wheel units are each arranged along a second direction intersecting the first direction; displacing the first connecting portion to a first position where the pair of wheel units are respectively disposed along the first direction; and placing the first connecting portion in the first position on the bed of a truck at the tunnel construction site.

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