Cask stacking structure and cask transport structure

Abstract

To easily transport a pedestal to which a cask is attached from a loading platform of a trailer by using a stacking structure for stacking the cask on the loading platform of the trailer.SOLUTION: A stacking structure for stacking a cask (200) on a loading platform (120) of a trailer (100) includes a pedestal (10) and a lower rail (22), the pedestal being placed on the loading platform and having the cask attached thereto, the lower rail being placed on the loading platform in a space formed below the pedestal and protruding from the loading platform in a vehicle-width direction of the trailer. The lower rail is supported, in response to lowering of the vehicle body of the trailer, by a step part (320) provided at the upper part of a trailer loading yard (300) excavated from a floor surface, whereby a traveling path for a carriage (500) that transports the pedestal is formed.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a loading structure for loading a cask onto the bed of a trailer, and a transport structure for transporting a cask from the bed of the trailer. [Background technology]

[0002] Spent fuel assemblies generated in nuclear power plants are housed in cylindrical casks (so-called containers), and the casks containing the fuel assemblies are stored in storage buildings. Here, the casks are transported by trailer, as described in Patent Document 1.

[0003] In Patent Document 1, a platform is loaded onto the bed of a trailer, and the cask is placed on a fixture fixed to the platform, and then the cask is transported by the trailer. The yard of the storage building into which the trailer carrying the cask is brought is dug deeper than the floor of the storage building, and a pair of roller conveyors is arranged at the top of each of the two side surfaces of the yard.

[0004] When the trailer enters the yard, a lifting device attached to the trailer lowers the platform onto a roller conveyor. A wire is attached to the platform and used to pull the platform with the casks loaded onto it into the loading area of ​​the storage building. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-75583 Summary of the Invention [Problem to be solved by the invention]

[0006] In Patent Document 1, a pair of roller conveyors is provided along the trailer loading direction, so when unloading a cask from the trailer, the platform on which the cask is placed must be moved along the trailer loading direction. In addition, after the platform is loaded from the trailer into the loading area, an air pallet must be attached to the platform, and the platform must be transported to the designated storage location by the air pallet.

[0007] An object of the present invention is to use a loading structure for loading a cask onto the bed of a trailer, and to easily transport a platform with a cask attached from the bed of the trailer. [Means for solving the problem]

[0008] The first invention of the present application is a loading structure for loading a cask onto the bed of a trailer, and includes a platform and a lower rail. The platform is placed on the bed, and the cask is attached to it. The lower rail is placed on the bed in a space formed below the platform and protrudes from the platform in the width direction of the trailer. As the trailer body is lowered, the lower rail is supported by a step provided at the top of the trailer loading yard, which is dug down from the floor, and forms a running path for the cart that transports the platform.

[0009] When the lower rail is supported by the step portion, the upper surface of the lower rail can be positioned in the same plane as the floor. The lower rail can be provided with a beam that is detachably connected to the car body.

[0010] The platform support can be disposed between the loading platform and the platform, and can protrude from the loading platform in the width direction of the trailer. As the vehicle body descends, the platform support can be supported by the step portion.

[0011] The second invention of the present application is a transport structure for transporting casks loaded on the bed of a trailer to a storage facility, and includes the loading structure of the first invention of the present application and a travel support member. The travel support member is disposed in the space formed between the end face of the lower rail and the side face of the step portion when the lower rail is supported by the step portion, forming a travel path for the carriage. Here, a connecting beam can be used that receives a force to lift the platform from the lifting device of the carriage that has moved onto the lower rail. [Effects of the Invention]

[0012] According to the present invention, the lower rail placed on the trailer bed is supported on a step in the loading yard and used as a running path for the cart, allowing the cart to easily access the platform placed on the bed, and the platform with the cask attached can be easily transported out of the trailer by the cart. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 10 is a schematic diagram showing the trailer moving to the loading yard of the storage facility. [Figure 2] FIG. 1 shows a loading structure including a platform mounted on the bed of a trailer. [Figure 3] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] 3 is a cross-sectional view of FIG. 2 taken along line B-B. [Figure 5] FIG. 10 is a diagram showing the state in which the lower rail is installed on the step portion of the loading yard. [Figure 6] FIG. 10 is a diagram illustrating the entry of a dolly into the bed of a trailer. [Figure 7] FIG. 10 is a diagram showing the state in which a travel assistance member is installed at a step portion of the delivery yard. [Figure 8] FIG. 10 is a diagram illustrating an example of a carriage. DETAILED DESCRIPTION OF THE INVENTION

[0014] (Cask loading structure) The structure for loading casks onto the bed of a trailer will be described with reference to FIGS.

[0015] As shown in Figure 1, trailer 100 carries cask 200 and moves to loading yard 300 provided in a storage facility for cask 200. Loading yard 300 is dug below the floor of the storage facility, and trailer 100 can move to loading yard 300 via slope 310. Trailer 100 has multiple wheels 110, and a platform 10 to which cask 200 is fixed is placed on a loading platform 120 of trailer 100.

[0016] 2 shows a loading structure including the platform 10 and cask 200 placed on the loading platform 120 of the trailer 100, and is an enlarged view of a portion shown in FIG. 1. As shown in FIG. 2, the platform 10 has a platform body 11, which is fixed to a pair of platform supports 21 by fasteners 12. The platform supports 21 are placed on the loading platform 120 of the trailer 100, and are used to transfer loads between the platform 10 and the loading platform 120.

[0017] The gantry support 21 extends in the vehicle width direction of the trailer 100 (a direction perpendicular to the plane of the paper in FIG. 2), and both longitudinal ends of the gantry support 21 protrude outward in the vehicle width direction from the loading platform 120, as will be described later. By fixing the gantry 10 to the gantry support 21, fixing the gantry support 21 to a beam 23, which will be described later, and fixing the beam 23 to the trailer 100, the gantry 10 with the cask 200 fixed thereto can be transported stably by the trailer 100.

[0018] The pedestal 10 has fixing parts 13 for fixing a convex trunnion 210 provided on the outer peripheral surface of the cask 200. As shown in Fig. 2, a pair of fixing parts 13 are provided at positions corresponding to both ends of the cask 200 in the axial direction (left and right direction in Fig. 2), and a pair of fixing parts 13 is also provided on the back side of the cask 200 shown in Fig. 2. As a result, the cask 200 is fixed to the pedestal 10 by the four fixing parts 13.

[0019] In this embodiment, four trunnions 210 are arranged at equal intervals in the circumferential direction of the cask 200 at each end in the axial direction (left and right direction in FIG. 2) of the cask 200. The trunnions 210 provided at the same phase in the circumferential direction of the cask 200 are fixed to the fixing portion 13.

[0020] A recess 14 is formed in the bottom surface of the platform body 11, and a space is formed between the recess 14 and the loading platform 120 of the trailer 100.

[0021] A pair of lower rails 22 are arranged at positions facing the bottom surface of the gantry main body 11 in the vertical direction. The lower rails 22 are placed on the loading platform 120 of the trailer 100 and extend in the vehicle width direction of the trailer 100. As will be described later, the lower rails 22 form a running path along which the carriage 500 travels, transporting the gantry 10 to which the cask 200 is fixed, and are also used to transmit the load when the gantry 10 is lifted by an elevating device provided on the carriage 500. The number of lower rails 22 can be determined as appropriate.

[0022] Fig. 3 is a cross-sectional view taken along line AA in Fig. 2, and Fig. 4 is a cross-sectional view taken along line BB in Fig. 2. Figs. 3 and 4 show a state in which the trailer 100 carrying the cask 200 and the cradle 10 has entered the loading yard 300 and stopped.

[0023] 3 and 4, the loading yard 300 has a width Wy that is sufficient to accommodate the trailer 100, and the width Wy is wider than the width of the trailer 100. As described above, the loading yard 300 is dug into the floor 400 of the storage facility, and a step 320 is provided at the top of the loading yard 300 (i.e., the boundary between the side wall of the loading yard 300 and the floor 400). The step 320 has a side surface 321 that extends downward from the floor 400 and a bottom surface 322 that extends in a direction parallel to the floor 400, and extends in the loading yard 300 in the direction of movement of the trailer 100 (a direction perpendicular to the plane of the paper in FIGS. 3 and 4).

[0024] 3, the length L1 of the platform receiver 21 in the longitudinal direction (left-right direction in FIG. 3) is longer than the width Wc of the bed 120 of the trailer 100, and both ends of the platform receiver 21 in the longitudinal direction protrude outward in the vehicle width direction from the bed 120 of the trailer 100. In addition, the length L1 of the platform receiver 21 is longer than the width Wy of the delivery yard 300, and both ends of the platform receiver 21 in the longitudinal direction are located above the bottom surface 322 of the step portion 320.

[0025] As shown in Figure 4, length L2 of lower rail 22 in the longitudinal direction (left-right direction in Figure 4) is longer than width Wc of bed 120 of trailer 100, and both ends of lower rail 22 in the longitudinal direction protrude outward in the vehicle width direction from bed 120 of trailer 100. In addition, length L2 of lower rail 22 is longer than width Wy of loading yard 300, and both ends of lower rail 22 in the longitudinal direction are located above bottom surface 322 of step portion 320.

[0026] Beams 23 protruding downward from the frame support 21 and the lower rail 22 are provided at both longitudinal ends of the frame support 21 and both longitudinal ends of the lower rail 22, and the beams 23 are detachably connected to the body of the trailer 100. In addition, above the lower rail 22, a space (a space formed by the recess 14 described above) is formed into which a connecting beam 30 arranged along the width direction of the trailer 100 and a bogie 500 (described later) can enter.

[0027] When the beam 23 and the trailer 100 body are disconnected and the body is lowered (i.e., the vehicle height is lowered), both longitudinal ends of the lower rail 22 can be brought into contact with the bottom surface 322 of the step portion 320, as shown in Figure 5.

[0028] On the other hand, when the vehicle body is lowered as described above, both longitudinal ends of the gantry support 21 can also be brought into contact with the bottom surface 322 of the step portion 320. As a result, the load of the cask 200 and the gantry 10 acts on the step portion 320 of the loading yard 300 via the gantry support 21. In other words, the step portion 320 can support the gantry 10 to which the cask 200 is fixed and the gantry support 21.

[0029] The height of lower rail 22 is approximately equal to the height of side surface 321 of step portion 320, and as shown in Fig. 5, when the lower surface of lower rail 22 contacts bottom surface 322 of step portion 320, the upper surface of lower rail 22 is located in the same plane as floor surface 400. As a result, as shown in Fig. 6, by moving truck 500, which is placed on floor surface 400 and on which connecting beam 30 is placed, in the direction of arrow D (the vehicle width direction of trailer 100), truck 500 can be moved from floor surface 400 to the upper surface of lower rail 22.

[0030] Depending on the length L2 of lower rail 22, a space may be formed between the leading end surface of lower rail 22 and side surface 321 of step portion 320. In this case, it may be difficult to move cart 500 from floor surface 400 to the upper surface of lower rail 22. Therefore, as shown in FIG. 7, travel assist member 40 can be disposed between the leading end surface of lower rail 22 and side surface 321 of step portion 320. This allows cart 500 to move smoothly between floor surface 400 and lower rail 22 via travel assist member 40. Note that travel assist member 40 may be any member that fills the space formed between lower rail 22 and step portion 320, and the shape of travel assist member 40 may be determined as appropriate.

[0031] The dolly 500 has a height that allows it to enter the space formed between the lower rail 22 and the frame 10 (the space formed by the recess 14 described above) together with the connecting beam 30. As the dolly 500, for example, the dolly 500 shown in FIG. 8 can be used. The dolly 500 shown in FIG. 8 has multiple sub-carriages 520 connected to each other via connectors 510. Each sub-carriage 520 can move in any direction within the plane shown in FIG. 8 and has an elevator device (not shown). As the elevator device, for example, a hydraulic or pneumatic elevator device can be used. As the sub-carriage 520, for example, a Super Micro Dolly (manufactured by Sankyu Inc.) can be used.

[0032] In the bogie 500 shown in Fig. 8, four sub-bogies 520 are connected in a row via connectors 510. The four sub-bogies 520 are arranged in two rows, and the sub-bogies 520 located at both ends of each row are connected via connectors 510. In this embodiment, by moving the bogie 500 in the direction in which the four sub-bogies 520 are lined up (the left-right direction in Fig. 8), the bogie 500 and the connecting beam 30 can enter the space formed between the lower rail 22 and the frame 10.

[0033] 8, four sub-carriages 520 are arranged in two rows, but this is not limited to this. In other words, it is sufficient that the cart 500 and the connecting beam 30 can enter the space formed between the lower rail 22 and the frame 10, and the total number of sub-carriages 520 constituting the cart 500 and the arrangement of the multiple sub-carriages 520 can be determined appropriately.

[0034] On the other hand, the carriage 500 has a control carriage 530, and the control carriage 530 has a connector 531. The connector 531 is detachably connected to the connector 510, and the control carriage 530 controls the running and lifting of the sub carriage 520. The control carriage 530 can be controlled via wireless or wired communication.

[0035] As described above, after the carriage 500 (sub-carriage 520 shown in FIG. 8) and connecting beam 30 enter the space formed between the lower rail 22 and the gantry 10, when the lifting device of each sub-carriage 520 is raised, the lifting device comes into contact with the gantry main body 11 and lifts the gantry 10. By lifting the gantry 10, the cask 200 attached to the gantry 10 can be lifted. Here, the connecting beam 30 receives a force from the lifting device of the sub-carriage 520 that lifts the gantry 10. The length of the connecting beam 30 in the longitudinal direction (left-right direction in FIG. 7) can be determined appropriately taking into consideration the lifting of the connecting beam 30 by the carriage 500.

[0036] (Cask 200 transportation method) Next, a method for transporting the cask 200 placed on the loading platform 120 of the trailer 100 to a predetermined storage position in the storage facility will be described.

[0037] 2, the gantry 10 to which the cask 200 is attached is fixed to the gantry support 21 placed on the platform 120 by a fixture 12, so first, the fixture 12 is removed, thereby making the gantry 10 movable.

[0038] Next, as shown in Fig. 6, the dolly 500 on which the connecting beam 30 is placed is caused to travel on the floor surface 400, thereby moving the dolly 500 onto the upper surface of the lower rail 22 placed on the bottom surface 322 of the step portion 320. Specifically, by moving the dolly 500 in the vehicle width direction of the trailer 100, the dolly 500 and the connecting beam 30 are allowed to enter the space formed between the lower rail 22 and the platform 10. Here, the dolly 500 moves from the floor surface 400 onto the upper surface of the lower rail 22, and moves along the longitudinal direction of the lower rail 22.

[0039] After the carriage 500 and the connecting beam 30 are stopped at a position corresponding to the gantry 10, the lifting device of the sub-carriage 520 is raised, thereby lifting the gantry 10 and the cask 200 via the connecting beam 30. Here, by synchronizing the lifting operations of the lifting devices of the multiple sub-carriage 520 that make up the carriage 500, it becomes easier to lift the gantry 10 and the cask 200.

[0040] With the carriage 500 lifting the connecting beam 30, the control carriage 530 controls and runs the sub-carrier 520, thereby moving the frame 10 and the cask 200 from the loading platform 120 of the trailer 100 to the floor 400. Then, the carriage 500 can be run to transport the cask 200 to a predetermined storage position.

[0041] After the cask 200 has been transported to a predetermined storage position, the lifting device of the sub-carriage 520 can be lowered to place the platform 10 on the floor 400. After the platform 10 has been placed on the floor 400, the connecting beam 30 and the sub-carriage 520 can be retrieved by moving the sub-carriage 520 in a direction away from the platform 10. Here, the platform 10 can be fixed to the floor 400 of the storage position using the fixing device 12.

[0042] According to this embodiment, by supporting the platform support 21 and lower rail 22 placed on the loading platform 120 of the trailer 100 on the step portion 320 of the loading yard 300, the support of the cask 200 and the platform 10 can be switched from the loading platform 120 to the step portion 320. Furthermore, by using the lower rail 22 as a running path for the carriage 500, the carriage 500 can easily access the platform 10 placed on the loading platform 120, and the carriage 500 can easily carry the platform 10 with the cask 200 attached from the loading platform 120 of the trailer 100 to the floor surface 400.

[0043] When the cask 200 placed in the storage position is to be transported to the loading platform 120 of the trailer 100, the above-described procedure can be carried out in reverse. [Explanation of symbols]

[0044] 10: stand, 11: stand body, 12: fixing device, 13: fixing part, 14: recess, 21: stand holder, 22: Lower rail, 23: Beam, 30: Connecting beam, 40: Traveling auxiliary member, 100: Trailer, 110: Wheel, 120: Bed, 200: Cask, 300: loading yard, 310: slope, 320: step, 321: side, 322: bottom, 400: floor surface, 500: carriage, 510: connector, 520: sub carriage, 530: control carriage, 531: Connector

Claims

1. A loading structure for loading casks onto a trailer bed, a platform mounted on the platform and on which the cask is attached; a lower rail that is placed on the loading platform in a space formed below the platform and protrudes from the loading platform in the vehicle width direction of the trailer; A cask loading structure characterized in that the lower rail is supported by a step portion provided at the top of the trailer loading yard, which is dug down from the floor surface in response to the descent of the trailer body, thereby forming a running path for the cart transporting the frame.

2. 2. The cask loading structure according to claim 1, wherein the upper surface of the lower rail is located in the same plane as the floor surface when the lower rail is supported by the step portion.

3. 2. The cask loading structure according to claim 1, wherein the lower rail has a beam detachably connected to the vehicle body.

4. a platform support disposed between the loading platform and the platform and protruding from the loading platform in the vehicle width direction of the trailer; 2. The cask loading structure according to claim 1, wherein the platform support is supported by the step portion in response to the lowering of the vehicle body.

5. A transport structure for transporting casks loaded on a trailer bed to a storage facility, A loading structure according to any one of claims 1 to 5; A cask transport structure characterized by having a running support member that is positioned in the space formed between the end face of the lower rail and the side face of the step portion when the lower rail is supported by the step portion, and that forms a running path for the cart.

6. 6. The cask transport structure according to claim 5, further comprising a connecting beam that receives a force for lifting the platform from an elevator device of the carriage that has moved onto the lower rail.

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