Conveying mechanism and construction method

Abstract

To provide a conveying device capable of conveying a material even when there is no support structure above.SOLUTION: To provide a conveyance mechanism comprising a track part supported by a structural column and a conveyance device for conveying a material by traveling the track section.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a transport mechanism and a construction method. [Background technology]

[0002] As a conventional technique, an electric hoist that runs on a rail fixed to the underside of a deck has been disclosed as a transport device (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-8991 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional technology, when working in a work area where there is no structure to support the rails above, it is not possible to install a conveying device. Therefore, other conveying methods such as manual labor must be used, which makes it difficult to improve the efficiency of the work.

[0005] In view of the above problems, the present invention provides a conveying device that enables the conveying of materials even when there is no support structure above. [Means for solving the problem]

[0006] In order to solve the above problems, one aspect of the present invention provides a conveying mechanism including a track section supported by structural columns, and a conveying device that runs on the track section to convey materials. Effect of the Invention

[0007] According to the present invention, it is possible to provide a conveying device that enables the conveying of materials even when there is no support structure above. [Brief description of the drawings]

[0008] [Figure 1] 4 is a cross-sectional view taken along the X-axis direction showing the transport mechanism and structures according to the embodiment. FIG. [Diagram 2] FIG. 2 is a layout diagram of a transport mechanism and structures according to the embodiment. [Diagram 3] FIG. 2 is a side view of a transport mechanism according to the embodiment. [Figure 4] FIG. 2 is a top view of a transport mechanism according to the embodiment. [Diagram 5] 3 is a cross-sectional view of the transport mechanism according to the embodiment taken along line V-V in FIG. 2. [Figure 6] FIG. 6 is a partially enlarged view of FIG. [Figure 7] 3A and 3B are enlarged views of the vicinity of a hoist in a transfer mechanism according to an embodiment, in which (a) is a side view seen from an X-axis direction, and (b) is a side view seen from a Y-axis direction. [Figure 8] 3 is a cross-sectional view of the transport mechanism according to the embodiment taken along line V-V in FIG. 2, showing the state after construction of the upper deck slab. [Figure 9] FIG. 11 is a cross-sectional view of a transport mechanism according to a modified example. [Figure 10] FIG. 11 is a side view of a transport device according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A transport mechanism 1 according to an embodiment of the present invention will be described below with reference to Figures 1 to 8. The transport mechanism 1 is installed inside a space S formed below an existing structure 9 having a pile foundation, and is mainly used for carrying in materials for constructing the structure 8.

[0010] The directions of mechanisms, components, devices, etc. in the diagram are defined using mutually perpendicular horizontal X-axis and Y-axis as shown in Figure 1. For parts, components, etc. that can be removed from mechanisms, devices, etc., the directions are defined in the state in which they are attached to the mechanisms, devices, etc.

[0011] The structure 8 has piles 81, which are cast-in-place piles, and structural columns 82 extending vertically below the existing structure 9 equipped with piles 91. The structural columns 82 are columns supported by the piles 81, and their upper portions extend upward from the upper portions of the piles 81. The structure 8 is a structure constructed by the inverted construction method, and after the construction of the structural columns 82, an upper deck slab 83 (FIG. 8) is constructed, which is supported and fixed to the upper ends of the structural columns 82. Details of the structure and construction of the structure 8 will be described later.

[0012] The transport mechanism 1 is a mechanism for transporting materials required mainly for the construction of the upper deck 83, and is installed above the structural pillars 82. As shown in Figs. 1 and 2, the transport mechanism 1 includes a track section 10 supported by the structural pillars 82, and a transport device 20 movably supported on the track section 10.

[0013] As shown in FIGS. 3 and 4, the track portion 10 includes a support portion 11, a girder 12, and a rail 13.

[0014] The support part 11 is a beam member that is assembled by joining a plurality of steel members together and supports the girder 12. The lower part of the support part 11 is fixed to the upper end part of the structural column 82, and the upper end part fixes the girder 12. Any method such as bolt joint or welding joint may be adopted as a method of fixing the structural column 82 and the girder 12. Also, in the embodiment, the support part 11 is composed of a plurality of angle irons, but a member other than angle irons may be used.

[0015] The girder 12 is a member extending in the X-axis direction and supporting the rail 13. The girder 12 is supported by structural columns 82 via support parts 11, and is erected above the structural columns 82. The lower part of the girder 12 is fixed to the upper end part of the support part 11. The girder 12 has vertical beams 12A, horizontal beams 12B, and a base 12C.

[0016] The vertical beams 12A and the horizontal beams 12B are steel members extending in the X-axis direction and the Y-axis direction, respectively, and are joined to each other. The two vertical beams 12A are arranged in parallel to extend in the X-axis direction and are fixed to the upper part of the support part 11. A plurality of horizontal beams 12B are arranged at approximately equal intervals in the X-axis direction, and each is fixed to the lower part of the vertical beams 12A. The vertical beams 12A and the horizontal beams 12B can be joined by any method, such as bolt joints or welding joints.

[0017] Two pedestals 12C are installed in parallel on the top of the cross beam 12B. More specifically, the two pedestals 12C are fixed to the Y-axis direction ends of the cross beam 12B, respectively. Both pedestals 12C are H-shaped steel extending in the X-axis direction, and are installed so that their flanges are approximately horizontal. Each pedestal 12C supports a rail 13 at its upper portion.

[0018] Two rails 13 are laid in parallel on the upper surface of the base 12C so as to extend in the X-axis direction. The rails 13 support the transport device 20 so that the transport device 20 can travel, and have a function of guiding the travel of the transport device 20 in the X-axis direction. Although rail steel is used for the rails 13 in this embodiment, H-shaped steel, I-shaped steel, etc. may also be used.

[0019] As shown in FIGS. 3 to 7, the transport device 20 includes a carriage 21, a hoist 22, and a hoist .

[0020] The cart 21 includes a main body 211 configured by assembling steel beams into a substantially rectangular parallelepiped shape, rollers 212, two motors 213 that drive the rollers 212, and a locking mechanism 216 (FIGS. 3 to 6).

[0021] The rollers 212 are provided at a plurality of positions on the lower part of the main body 211, and are each rotatably supported by the main body 211 (FIG. 3). The rollers 212 have flanges, and are disposed on the upper part of the rail 13. The rollers 212 are capable of rolling on the rail 13.

[0022] 3 and 4, the motor 213 is fixed to the lower part of the main body 211. The motor 213 can transmit a driving force to the rollers 212 via a reduction mechanism (not shown) to rotate the rollers 212. This allows the cart 21 to travel on the rails 13.

[0023] The locking mechanism 216 is a member extending downward from the lower part of the main body 211, and its lower end is located between the flanges of the pedestal 12C (FIG. 6). The locking mechanism 216 is provided at both ends of the main body 211 in the Y-axis direction. When the main body 211 is tilted, the lower end of the locking mechanism 216 abuts against the flanges of the pedestal 12C. This prevents the cart 21 from falling over.

[0024] The suspender 22 includes two support members 221, a beam member 222, an upper roller 223, a lower roller 224, and two motors 225 (FIGS. 3 to 7). The suspender 22 corresponds to the arm of the present invention.

[0025] The support members 221 are all H-shaped steel members extending in the Y-axis direction, and are fixed to the upper part of the main body 211 so that the flanges are substantially horizontal.

[0026] The girder 222 is a member formed by assembling a plurality of H-shaped steel beams extending in the X-axis direction and the Y-axis direction in a grid shape and joining them together. As shown in Fig. 4, the girder 222 is formed in a substantially rectangular shape when viewed from above.

[0027] The upper roller 223 and the lower roller 224 are installed on the upper part of the beam 222 at three locations, namely, both ends and the center in the Y-axis direction, and are each rotatably supported by the beam 222 (FIGS. 6 and 7). The upper roller 223 and the lower roller 224 vertically sandwich the lower flange of the support material 221.

[0028] The motor 225 is installed near the upper roller 223 and above the girder 222 (FIG. 7(b)). The motor 225 is connected to the upper roller 223 via a speed reducer mechanism and can drive the upper roller 223 to rotate. When the motor 225 drives the upper roller 223 to rotate, the upper roller 223 moves while rotating relative to the support 221, and following this, the lower roller 224 also rolls relative to the support 221. This allows the girder 222 to move in the Y-axis direction relative to the support 221. In other words, the suspension girder 22 can expand and contract in the Y-axis direction as shown by the white arrows in FIGS. 4 to 6 and 8.

[0029] The hoist 23 is disposed at approximately the center in the X-axis direction of the beam 222 (FIG. 7(b)). The hoist 23 is supported so as to be movable in the Y-axis direction relative to the beam 222, and includes a wire 231, a hook 232, a motor 233, a motor 234, and a roller 235, as shown in FIG.

[0030] The hoist 23 uses a motor 233 to wind up and down a wire 231, and can move a hook 232 suspended from the wire 231 up and down. Materials can be suspended and held on the hook 232 directly or via a wire rope or the like. The hook 232 corresponds to the holding part in this invention.

[0031] The motor 234 is installed near the roller 235 (FIG. 7). The motor 234 is connected to the roller 235 via a reduction mechanism, and can rotate the roller 235. The roller 235 is disposed on the lower flange of the H-shaped steel that constitutes the girder 222 (FIG. 7(b)). The hoist 23 can travel in the Y-axis direction between both ends of the girder 222 by rotating the roller 235 using the motor 234.

[0032] <Process> Taking the above-mentioned transport mechanism 1 as an example of use, the process of constructing a structure 8 below an existing structure 9 will be described below.

[0033] (Installation of structural columns) In the first step, the builder installs the piles 81, which are cast-in-place piles. First, an opening A is made in the ground surface near the existing structure 9, and excavation is performed below the existing structure 9. As a result, a space S for constructing the structure 8 and a ground surface G are formed below the existing structure 9 (Fig. 1).

[0034] Next, the builder constructs the piles 81 and the structural columns 82. The structure and construction method of the piles 81 are appropriately selected according to the design conditions, etc. For example, the piles 81 may be made of reinforced concrete or may be made of steel pipe concrete. It is also possible to make the piles 81 into steel pipe columns that are extended upward to become the structural columns 82. The structure of the structural columns 82 is also appropriately selected, and examples thereof include steel columns, steel pipe columns, H-shaped steel columns, and steel columns in which H-shaped steel is assembled into a cross-shaped cross section. As an example, when the piles 81 are cast-in-place piles made of reinforced concrete, the ground surface G is excavated, and reinforcement is arranged in the excavated hole, the structural columns 82 are erected, and concrete is poured.

[0035] As a result of construction, as shown in Figure 1, the lower part of the structural pillar 82 is fixed to the pile 81, and the upper part of the structural pillar 82 protrudes upward from the ground surface G.

[0036] (Installation of conveying mechanism) As the next step, the installer installs the transport mechanism 1 in the following procedure.

[0037] The contractor erects the girder 12 above the structural columns 82. The girder 12 is installed below the existing structure 9 so as to pass between the piles 91 of the existing structure 9 and further pass below the opening A (FIG. 2). The transport mechanism 1 can be installed in multiple locations depending on the size of the existing structure 9 and the shape of the work area. In this embodiment, the transport mechanism 1 is installed in two locations as shown in FIG. 2.

[0038] In the process of erecting the girder 12, the builder first assembles and fixes the support part 11 to the top of the structural column 82 (Figs. 3 and 4). Next, two vertical beams 12A are erected and fixed to the tops of the multiple support parts 11, and then the cross beams 12B and the vertical beams 12A are assembled and joined to each other in a grid pattern. In this way, the girder 12 is erected above the structural column 82, as shown in Figs. 3 and 4.

[0039] The girder 12 may be erected by sequentially assembling the girder 12 above the support 11 as described above, or may be erected by installing the preassembled girder 12 on the upper part of the support 11. By using the cross beam 12B and the vertical beam 12A, the trolley 21 can be manufactured with a light weight, and the installation workability and economy at the site can be improved.

[0040] Next, the contractor lays the rails 13 on the top of the girders 12 to complete the assembly of the track section 10. After laying the rails 13, the contractor installs the conveying device 20 on the rails 13. The installation of the conveying device 20 may be performed by a method of installing the assembled conveying device 20 on the rails 13. The installation of the conveying device 20 may also be performed by a method of sequentially assembling the carriage 21, the hoist 22, and the hoist 23 on the rails 13.

[0041] (Construction of upper deck) Next, the builder constructs the upper deck 83. Materials necessary for constructing the upper deck 83 are carried in by the conveying device 20. In detail, the builder carries materials such as shoring 71, formwork 72 (FIGS. 5 and 6), and reinforcing bars from the opening A into the space S, and then uses the conveying mechanism 1 to transport these materials to appropriate locations. The materials are unloaded into the space S, for example, using a crane CR as shown in FIG. 1 and FIG. 2.

[0042] When transporting materials, as shown in FIG. 5 and other figures, the hoist 23 and the sling 22 of the transport device 20 are extended and retracted in the Y-axis direction, and the hoist 23 is used to wind up and lower the wire 231, thereby lifting and unloading the materials. Since the sling 22 extends and retracts, and the hoist 23 moves relative to the beam 222, the range in which the materials can be lifted and unloaded can be expanded. Furthermore, the sling 22 is retracted during transport to prevent interference with the pile 91 (right side of FIG. 5). The locking mechanism 216 prevents the transport device 20 from tipping over during lifting and unloading. Therefore, the transport device 20 has a higher lifting performance than a transport device without a locking mechanism.

[0043] The conveying device 20 travels on rails 13 to convey the materials. Because the conveying mechanism 1 is installed above the construction range of the upper deck 83, the materials are conveyed without interfering with reinforcement work, formwork assembly, and other work. Because the track section 10 is installed to pass below the opening A (FIGS. 1 and 2), the materials brought in through the opening A can be easily unloaded and conveyed by the conveying device 20.

[0044] In this embodiment, the transport mechanism 1 is installed in two locations, so the contractor can divide the construction area into two work sections R1 and R2, with the transport mechanism 1 installed in the center, and carry out construction in the work sections R1 and R2 in parallel (Figure 2). This allows the construction work to proceed efficiently.

[0045] The builder assembles the support 71 and the formwork 72 and arranges the reinforcement as shown in Figures 3 and 4. After that, concrete is poured and cured to construct the upper deck 83 (Figure 8). Note that a bucket may be transported by the transport device 20 when pouring the concrete.

[0046] After the upper deck 83 is constructed, the transport device 20 is dismantled and carried out through the opening A. Meanwhile, the ground below the upper deck 83 is excavated, and construction of the structure 8 below the upper deck 83, including the construction of a new deck, continues.

[0047] <Modification> In the embodiment, the two rails 13 laid on the upper part of the girder 12 are used as the track of the transport device 20. However, the present invention is not limited to such a configuration. As shown in Fig. 9, a monorail 13A may be used as the track and supported by a support part 11A. If the rail 13 has sufficient strength, the rail 13 may be directly placed on the structural pillar 82.

[0048] In the embodiment, an assembly type crane having an extendable hoist 22 is used as the transport device 20, but it is also possible to use other types of cranes such as a jib crane (FIG. 10). Also, a configuration without the hoist 22 or jib, i.e., without arms, may be used in which materials are directly placed on the cart 21 for transport.

[0049] In the embodiment, the structural pillar 82 supports the upper deck 83 at its upper end. The configuration of the structural pillar 82 is not limited to this structure. As with the construction method and structure adopted in the general inverted construction method, in areas that do not interfere with the existing structure 9, the structural pillar 82 extends above the upper deck 83 and functions as a pillar, and can support and fix the deck (right side of FIG. 1).

[0050] The upper floor slab 83 may be of a structure other than reinforced concrete, such as a steel frame structure or a reinforced concrete structure. The structure of the connection between the upper floor slab 83 and the structural columns 82 is also selected appropriately according to the design conditions, such as reinforced concrete or a steel frame bracket.

[0051] <Effects> In the above embodiment, the conveying mechanism 1 includes a track section 10 supported by a structural pillar 82, and a conveying device 20 that travels on the track section 10 to convey materials.

[0052] In the above configuration, the materials can be efficiently transported using the transport device 20, and construction can proceed. Without the transport mechanism 1, it is not possible to improve the efficiency of construction using other transport methods such as human power. On the other hand, in the above configuration, since the track section 10 is supported by the structural pillars 82, a transport route can be secured even if there is no structure above to support the track section 10, and construction can proceed efficiently.

[0053] In the above embodiment, at least a part of the track portion 10 is located below the existing structure 9 different from the structural pillar 82. In addition, the track portion 10 is located between the piles 91 of the existing structure 9.

[0054] In the above configuration, it is possible to efficiently transport materials below the existing structure 9 while avoiding interference with the existing structure 9. Without the transport mechanism 1, it would be necessary to start formwork work from the point farthest from the opening A, which is the entrance for materials, whereas by using the transport mechanism 1, materials can be brought in to any point along the track 10 and construction can be carried out. It is also possible to simultaneously carry out construction work in each of the work sections R1 and R2, regardless of the distance from the opening A, improving construction efficiency and shortening the construction period. In this way, construction efficiency can be improved even in cases where the entrance for materials is limited.

[0055] In the above embodiment, the track portion 10 is located above the structural column 82. In detail, the structural column 82 supports the upper deck 83 at its upper end portion, and the track portion 10 is located above the structural column 82 and the upper deck 83.

[0056] The above configuration does not interfere with the construction of the structure up to the upper end of the structural column 82. Therefore, construction of the structure 8, such as the upper deck 83, can be progressed efficiently.

[0057] In the above embodiment, the track section 10 includes the rails 13 on which the transport device 20 runs, and the girder 12 configured of the vertical beams 12A and the horizontal beams 12B joined to each other.

[0058] In the above configuration, the lightweight girder 12 can be assembled with a simple configuration using the vertical beams 12A and the horizontal beams 12B. Therefore, the transport mechanism 1 can be easily installed. This improves the efficiency and economy of installation work on site.

[0059] In the above embodiment, the transport device 20 has an extendable hoist 22, a wire 231 supported by the hoist 22, and a hook 232 suspended from the wire 231 as a holder capable of holding materials.

[0060] In the above configuration, the conveying device 20 can be configured with a simple mechanism and can be made to be a device capable of holding and conveying materials. Since the hoist 22 is extendable, the range in which the conveying device 20 can lift and unload can be expanded.

[0061] The construction method shown in the above embodiment includes the steps of constructing a structural column 82, installing a conveying mechanism 1, transporting materials using a conveying device 20, and constructing an upper deck slab 83 supported on the upper end of the structural column 82 using the transported materials.

[0062] In the above construction method, materials can be efficiently transported using the transport device 20, and construction can proceed. Since the track section 10 is supported by the structural pillars 82, a transport route can be secured even if there is no structure above to support the track section 10, and construction can proceed efficiently. [Explanation of symbols]

[0063] 1. Transport mechanism 10 Track section 20. Conveyor 8 Structures 81 Pile 82 Structure Pillar 83 Upper deck version 9 Existing Structures 91 Pile

Claims

1. A track portion supported by a structural column; a conveying device that travels on the track portion to convey materials, At least a portion of the track portion is located below an existing structure independent of the structural column; Transport mechanism.

2. The transport mechanism according to claim 1 , wherein the track portion is located above the structural pillar.

3. A track portion supported by a structural column; a conveying device that travels on the track portion to convey materials, The structural column supports a deck slab at its upper end, The track portion is located above the structural column and the deck, Transport mechanism.

4. The raceway portion is A rail along which the conveying device runs; The transport mechanism according to any one of claims 1 to 3, further comprising: a girder on which the rails are laid, the girder being constituted by vertical beams and horizontal beams joined together.

5. The conveying device is An extendable arm; A wire supported by the arm portion; The transport mechanism according to claim 1 , further comprising: a holder suspended from the wire and capable of holding a material.

6. A step of constructing a structural column; A process of installing a conveying mechanism including a track section supported by the structural columns and a conveying device that travels on the track section to convey materials; transporting materials using the transport device; and using the transported materials to construct a deck supported on the upper ends of the structural columns.

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