Base Frame Structure

Abstract

To provide a base frame structure for supporting a floor plate of a cargo box, which can secure sufficient rigidity even when the cargo box is enlarged and can secure the inside height to the maximum.SOLUTION: A base frame structure 9 comprises: a first outside frame 91 extending in a longitudinal direction at one side end; a second outside frame 92 extending in the longitudinal direction at the other side end; a front member 93 connecting the first outside frame 91 and the second outside frame 92 on a front end side in the longitudinal direction of a container 1; a rear member 94 connecting the first outside frame 91 and the second outside frame 92 on a rear end side in the longitudinal direction of a cargo box; and a center frame 10 extending in the longitudinal direction between the first outside frame 91 and the second outside frame 92. The center frame 10 comprises a plate-like vertical wall 11 projecting upward from a lower surface of a floor plate 2 and extending in the longitudinal direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a base frame structure that supports the floor of a shipping box. [Background technology]

[0002] Standardized shipping boxes, commonly referred to as containers, are known. In container transport using such containers, the containers are used for marine and land transport with cargo still loaded inside, and are therefore designed to be detachable from cargo ships, railroad cars, and trucks.

[0003] In response to the recent increase in logistics activity and a shortage of drivers, there is a demand for larger containers so that they can be loaded with larger amounts of cargo and improve the efficiency of cargo transportation. Conventionally, a base frame structure supporting the floor plates of a container is basically configured with a pair of outside frames formed at the left and right side ends of the container and extending in the longitudinal direction. When such a container is transferred between ships, railway vehicles, and trucks, for example, corner fittings are arranged at the four upper corners of the container, and spreaders are applied to the corner fittings to lift the container and remove it. However, if the overall height of the container is set low to fit the size of a railway tunnel, the container will have a disadvantageous shape in terms of rigidity during lifting. Therefore, in order to ensure rigidity that prevents the floor plates from bending without increasing the overall height of the container, it is possible to increase the cross-sectional height of the outside frames constituting the base frame structure. However, if the container has a wing design in which the side walls are completely open (see, for example, Patent Document 1), cargo will have to be loaded and unloaded from the side using a forklift or similar, and making the outside frame higher would be disadvantageous in terms of loading and unloading cargo as well, making it undesirable.

[0004] Furthermore, if the height of the outside frames is increased, the height of the floor plates supported by the outside frames also increases, which results in the problem that the interior height of the container cannot be sufficiently secured, resulting in a decrease in transport capacity. This is particularly problematic when a larger container capacity is desired. This problem is not limited to wing-type containers, but can also occur in other containers with side walls that open forward and backward and are fully open.

[0005] Furthermore, in order to increase the rigidity of the container, it is conceivable to arrange a center frame that supports the underside of the floor plates extending in the longitudinal direction of the container, in the intermediate portion between the left and right outside frames of the base frame structure. However, containers that are detachable from railroad cars and trucks are sometimes placed on flat ground, and since the space between the floor plates of the container and the ground is limited, even if the center frame is arranged on the underside of the floor plates, it is difficult to ensure sufficient rigidity to prevent the container from bending. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-292189 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been developed in consideration of the above facts, and its main technical objective is to provide a base frame structure that supports the floor boards of a cargo box while ensuring sufficient rigidity even when the cargo box is enlarged and ensuring maximum interior height. [Means for solving the problem]

[0008] In order to solve the above-mentioned main technical problem, according to the present invention, there is provided a base frame structure for supporting a floor panel of a cargo box, the base frame structure comprising: a first outside frame extending in the longitudinal direction at one side end; a second outside frame extending in the longitudinal direction at the other side end; a front member connecting the first outside frame and the second outside frame at the front end side in the longitudinal direction of the cargo box; a rear member connecting the first outside frame and the second outside frame at the rear end side in the longitudinal direction of the cargo box; and a center frame extending in the longitudinal direction between the first outside frame and the second outside frame, the center frame having a plate-shaped vertical wall portion that protrudes upward from the underside of the floor panel and extends in the longitudinal direction. A plurality of cross members are disposed between the first outside frame and the second outside frame, the cross members being perpendicular to and penetrating the center frame. A base frame structure is provided. Furthermore, according to the present invention, there is provided a base frame structure for supporting the floor panel of a cargo box, the base frame structure comprising: a first outside frame extending longitudinally at one side end; a second outside frame extending longitudinally at the other side end; a front member connecting the first outside frame and the second outside frame at the front end side in the longitudinal direction of the cargo box; a rear member connecting the first outside frame and the second outside frame at the rear end side in the longitudinal direction of the cargo box; and a center frame extending longitudinally between the first outside frame and the second outside frame, the center frame comprising a plate-shaped vertical wall portion that protrudes upward from the underside of the floor panel and extends longitudinally, the cargo box comprising a top wall opposite the floor panel, and the base frame structure is configured so that the spaces on one side and the other side within the cargo box divided by the center frame are connected by an open area formed by the upper end of the center frame and the top wall of the cargo box. Furthermore, according to the present invention, there is provided a base frame structure for supporting the floor panel of a cargo box, the base frame structure comprising: a first outside frame extending longitudinally at one side end; a second outside frame extending longitudinally at the other side end; a front member connecting the first outside frame and the second outside frame at the front end side in the longitudinal direction of the cargo box; a rear member connecting the first outside frame and the second outside frame at the rear end side in the longitudinal direction of the cargo box; and a center frame extending longitudinally between the first outside frame and the second outside frame, the center frame having a plate-shaped vertical wall portion that protrudes upward from the underside of the floor panel and extends longitudinally, and a horizontal portion extending longitudinally formed at at least either the upper end or the lower end of the vertical wall portion.

[0009] It is preferable that a plurality of cross members are disposed between the first outside frame and the second outside frame, intersecting and passing through the center frame. The floor panel of the cargo box is preferably supported by any one of the front member, the rear member, the first outside frame, the second outside frame, the center frame, and the cross member. It is also preferable that the cargo box has a top wall facing the floor panel, and that the spaces on one side and the other side of the cargo box separated by the center frame are connected by an open area formed by the upper end of the center frame and the top wall of the cargo box. [Effects of the Invention]

[0011] The base frame structure of the present invention comprises a first outside frame extending in the longitudinal direction at one side end, a second outside frame extending in the longitudinal direction at the other side end, a front member connecting the first outside frame and the second outside frame at the front end side in the longitudinal direction of the packing box, a rear member connecting the first outside frame and the second outside frame at the rear end side in the longitudinal direction of the packing box, and a center frame extending in the longitudinal direction between the first outside frame and the second outside frame, the center frame comprising a plate-shaped vertical wall portion protruding upward from the underside of the floor panel and extending in the longitudinal direction. In this configuration, a plurality of cross members are disposed between the first outside frame and the second outside frame, and are perpendicular to and penetrate the center frame. Because of this, Alternatively, the packing box is provided with a top wall facing the floor board, and the spaces on one side and the other side of the packing box divided by the center frame are connected to each other by an open area formed by the upper end of the center frame and the top wall of the packing box, or a horizontal portion extending in the longitudinal direction is formed at least at either the upper end or the lower end of the vertical wall portion, It is possible to provide a base frame structure that can support the floor boards of a cargo box, ensuring sufficient rigidity even when the cargo box is made larger, and ensuring the maximum possible interior height.For example, corner fittings are arranged at the four upper corners of the container that makes up the cargo box, and when the container is lifted using spreaders and attached to or detached from a railroad car or truck, problems such as bending of the floor boards are eliminated. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a rear perspective view of the container of the present embodiment. [Figure 2] FIG. 1A is a perspective view of a base frame structure supporting floor panels, and FIG. 1B is a perspective view of the base frame structure shown in FIG. 1A without the floor panels. [Figure 3] FIG. 2A is an enlarged perspective view of a portion of the base frame structure showing how a cross member is fixed to a center frame; FIG. 2B is a further enlarged perspective view of the portion of the base frame structure shown in FIG. 2A. [Figure 4] 1A is a perspective view showing a manner in which the front end portion of the center frame is fixed to the front member, and FIG. 1B is a perspective view showing a state in which the front end portion of the center frame is fixed to the front member. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a base frame structure for a shipping box constructed based on the present invention will be described in detail below with reference to the accompanying drawings.

[0014] FIG. 1 shows a rear perspective view of a container 1 equipped with a base frame structure for a cargo box according to this embodiment, which will be described in detail later. For convenience of explanation, the direction indicated by arrow F in FIG. 1 is the forward direction, the direction indicated by arrow B is the rearward direction, the direction indicated by arrow R is the rightward direction, and the direction indicated by arrow L is the leftward direction, but these directions do not necessarily define the directions in which the container 1 is transported. As shown in FIG. 1, the container 1 according to this embodiment is a cargo box with wings, with open left and right sides. The container 1 is configured to be detachably attached to, for example, a railroad car or a truck (both of which are not shown) using a fastening device (not shown).

[0015] The container 1 comprises floor panels 2 forming the floor surface within the container 1, a front wall 3 erected on the front ends of the floor panels 2, a rear wall 4 erected on the rear ends of the floor panels 2, a center beam 5 connecting the centers of the upper ends of the front wall 3 and the rear wall 4 in the front-to-rear direction and forming part of the ceiling wall, a pair of left and right wings 6, 6 each consisting of an upper surface portion 61 rotatably supported on the center beam 5 and constituting part of the ceiling wall together with the center beam 5, and a side surface portion 62 forming the upper part of the side wall of the container 1 and perpendicular to the upper surface portion 61, a pair of left and right gates 7, 7 forming part of the lower side of the side wall and supported so as to be able to open and close, corner fittings 8 (the front corner fitting 8 is not visible) arranged at the four corners at the top of the container 1 and used when attaching and detaching the container 1, and a center frame 10 having a vertical wall portion 11 arranged at the center of the width of the floor panels 2. The gates 7, 7 may be divided into multiple plate members in the front-to-rear direction.

[0016] The rear wall 4 is, for example, a double door that is divided into two doors and pivotally supported on rear pillars 41, 41, and can completely open the rear of the container 1. The container 1 of this embodiment can load and unload cargo from the left and right side walls and the rear wall 4 by opening the wings 6, 6, the gates 7, 7, and the rear wall 4.

[0017] Figure 2(a) shows a schematic perspective view of a base frame structure 9 obtained by omitting the front wall 3, rear wall 4, center beam 5, wings 6, 6, gates 7, 7, corner fittings 8, etc. from the above-mentioned container 1, and Figure 2(b) shows a schematic perspective view of the base frame structure 9 obtained by omitting the floor panel 2 from Figure 2(a).

[0018] The base frame structure 9 comprises a first outside frame 91 extending longitudinally at one side end (the right in this embodiment), a second outside frame 92 extending longitudinally at the other side end (the left in this embodiment), a front member 93 connecting the first outside frame 91 and the second outside frame 92 at the front end side in the longitudinal direction of the container 1, a rear member 94 connecting the first outside frame 91 and the second outside frame 92 at the rear end side in the longitudinal direction of the container 1, and a center frame 10 extending longitudinally between the first outside frame 91 and the second outside frame 92.

[0019] As can be seen from FIG. 2(a), the vertical wall 11 of the center frame 10 is formed in the shape of a plate that protrudes upward from the underside of the floor panel 2 and extends in the longitudinal direction. Furthermore, as can be seen from FIG. 2(b), horizontal portions 11a, 11b that extend in the longitudinal direction are formed at the upper and lower ends of the vertical wall 11. Furthermore, a plurality of cross members 95 that penetrate perpendicularly to the vertical wall 11 of the center frame 10 are disposed between the first outside frame 91 and the second outside frame 92. The cross members 95 have, for example, a U-shaped cross section, and are fixed to the vertical wall 11 by passing through it. Both ends of the cross members 95 are fixed to the first outside frame 91 and the second outside frame 92.

[0020] Fig. 3 shows a manner in which the cross member 95 is fixed to the center frame 10. Fig. 3(a) is an enlarged view of a portion of the base frame structure 9. As shown in Fig. 3(a), the vertical wall portion 11 of the center frame 10 is formed with a U-shaped through-hole 11c that corresponds to the cross-sectional shape of the cross member 95, and four bolt insertion holes 11d that are used to fix the cross member 95 to the vertical wall portion 11. The cross member 95 is formed with bolt insertion holes 95a that are used to fix the cross member 95 to the vertical wall portion 11, at positions that sandwich the center position C in the longitudinal direction. When fixing the cross member 95 to the center frame 10, as shown in Figure 3(a), the cross member 95 is inserted into the through hole 11c of the vertical wall portion 11, the center position C of the cross member 95 is positioned on the vertical wall portion 11, and a fixing device shown in Figure 3(b), for example, an L-shaped angle 12, is positioned at the location where the cross member 95 and the vertical wall portion 11 are fixed from both the left and right sides, and the vertical wall portion 11 and the cross member 95 are fastened and fixed using a bolt B and a nut N.

[0021] As shown in Figure 2(b) above, both ends of the cross member 95 are positioned inside the first outside frame 91 and the second outside frame 92 and fixed by, for example, welding. Note that the manner in which the cross member 95 is fixed to the center frame 10 described above and the manner in which the cross member 95 is fixed to the first outside frame 91 and the second outside frame 92 are not limited to the above-described manner, and other well-known methods may be used as appropriate.

[0022] The front end 10a and rear end 10b of the center frame 10 are fixed to the front member 93 and the rear member 94, respectively. When fixing the front end 10a and rear end 10b of the center frame 10 to the front member 93 and the rear member 94, they can be fixed, for example, in the manner shown in FIGS. 4(a) and 4(b). With reference to FIG. 4(a), a manner of fixing the front end 10a of the center frame 10 to the front member 93 will be described. A notch 93b into which the tip end 10a of the center frame 10 is inserted is formed in the center position in the width direction of the upper surface 93a of the front member 93. In addition, a recess 93d is formed in the lower surface 93c of the front member 93, into which the horizontal portion 11b formed at the lower end of the vertical wall portion 11 of the center frame 10 is engaged. Furthermore, a reinforcing member 13 consisting of reinforcing walls 13a, 13b is attached by welding to the area where the above-mentioned cuts 93b and recesses 93d are formed, and the upper surface 93a, lower surface 93c and front surface 93e of the front member 93 form a box-like shape, reinforcing the reduction in strength caused by the above-mentioned cuts 93b and recesses 93d.

[0023] As shown in FIG. 4(a), the front end 10a of the center frame 10 is inserted into the notch 93b of the front member 93, and the horizontal portion 11b of the vertical wall portion 11 is engaged with the recess 93d. The L-side angle plate 14 is positioned at the right angle formed by the vertical wall portion 11 and the reinforcing member 13, and they are fixed by welding. The rear end 10b of the center frame 10 can also be fixed to the rear member 94 in a manner similar to that described above (detailed description will be omitted). Note that the manner in which the front end 10a and the rear end 10b of the center frame 10 are fixed to the front member 93 and the rear member 94 is not limited to the manner described above. For example, they may be fixed using the L-shaped angle 12, bolt B, and nut N used when fixing the cross member 95 to the vertical wall portion 11.

[0024] The floor panel 2 is supported by any one of the front member 93, rear member 94, first outside frame 91, second outside frame 92, center frame 10, and cross member 95 of the base frame structure 9 described above, but in this embodiment, it is supported directly or indirectly by the cross member 95. The upper surface of the floor panel 2 supported by the base frame structure 9 is flush with the upper surfaces of the first outside frame 91 and second outside frame 92, and the floor panel 2 is supported by arranging a spacer (not shown) on the upper surface of the cross member 95 as necessary.

[0025] As shown in Fig. 1, the container 1 of this embodiment has a top wall formed by the above-mentioned center beam 5 and the upper surfaces 61 of the wings 6 at a position opposite the floor plate 2. The space P1 on one side (right side) and the space P2 on the other side (left side) of the container box, which are divided by the center frame 10 having a vertical wall portion 11, are configured to communicate with each other through an open area S formed by the upper end of the center frame 10 (the horizontal portion 11a in this embodiment) and the center beam 5 of the top wall. Note that nothing is provided in the open area S to block the space P1 from the space P2.

[0026] As described above, the base frame structure 9 supporting the floor panels 2 includes a center frame 10 extending in the longitudinal direction between the first outside frame 91 and the second outside frame 92, and the center frame 10 includes a plate-shaped vertical wall portion 11 that protrudes upward from the underside of the floor panels 2 and extends in the longitudinal direction. As a result, even if the overall height of the container 1 is set to a low dimension, the rigidity of the base frame structure 9 of the container 1 is significantly strengthened, and it becomes possible to ensure sufficient rigidity to prevent the floor panels 2 from bending, for example, even when the container 1 is lifted using spreaders (not shown) applied to corner fittings 8 arranged at the four corners at the top of the container 1.

[0027] Note that, when loading cargo into the container 1, for example, a standardized pallet (not shown) (1100 mm × 900 mm or 1100 mm × 1100 mm) is often used. Therefore, by setting the internal dimension from the center frame 10 to the gate 7 of the container 1 to, for example, 1150 mm or more, it does not pose a significant problem even if the vertical wall 11 is disposed in the center of the floor panel 2. In this case, it is preferable to make the left-right dimension of the horizontal portion 11a formed at the upper end of the vertical wall 11 as small as possible. For example, it is preferable to set the width dimension of the horizontal portion 11a smaller than the width dimension of the horizontal portion 11b at the lower end located on the underside of the floor panel 2. As described above, since the vertical wall 11 protrudes above the floor panel 2, the standardized pallet can be used as a reference position when loading the container 1, thereby enabling cargo to be loaded efficiently into the container 1.

[0028] Furthermore, in this embodiment, the right-side space P1 and the left-side space P2 within the container 1, which are separated by the center frame 10, are configured to communicate with each other through an open area S formed by the upper end (horizontal portion 11a) of the center frame 10 and the center beam 5 constituting the top wall of the container 1, and nothing in the open area S obstructs the view between the spaces P1 and P2. By utilizing the open area S thus formed, it is also possible to load cargo larger than the above-mentioned standardized pallets. In this case, empty pallets or the like can be stacked on the floor surface 2 forming the left and right spaces P1 and P2, thereby forming a horizontal loading surface at a position higher than the horizontal portion 11a at the upper end of the vertical wall portion 11. [Explanation of symbols]

[0029] 1: Container 2: Floorboards 3: Front wall 31: Front pillar 4: Back wall 41: Posterior pillar 5: Center beam 6: Wing 7: Aori 8: Corner fittings 9: Base frame structure 91: First Outside Frame 92: Second Outside Frame 93: Front member 94: Rear member 95: Cross member 10: Center frame 10a: Front end 10b: Rear end 11: Vertical wall section 11a:Horizontal part 11b:Horizontal part 11c: Through hole 11d: Bolt insertion hole 12: L-shaped angle 14: L-shaped plate

Claims

1. A base frame structure supporting the floor of a packing box, The base frame structure comprises: a first outside frame extending in a longitudinal direction at one side end; a second outside frame extending in the longitudinal direction at the other side end; a front member connecting the first outside frame and the second outside frame at a front end side in the longitudinal direction of the cargo box; a rear member connecting the first outside frame and the second outside frame at a rear end side in the longitudinal direction of the cargo box; a center frame extending in the longitudinal direction between the first outside frame and the second outside frame, The center frame includes a plate-like vertical wall portion that protrudes upward from the lower surface of the floor board and extends in the longitudinal direction, A base frame structure in which a plurality of cross members are disposed between the first outside frame and the second outside frame, the cross members being perpendicular to and penetrating the center frame.

2. A base frame structure supporting a floor board of a cargo box, The base frame structure comprises: a first outside frame extending in a longitudinal direction at one side end; a second outside frame extending in the longitudinal direction at the other side end; a front member connecting the first outside frame and the second outside frame at a front end side in the longitudinal direction of the cargo box; a rear member connecting the first outside frame and the second outside frame at a rear end side in the longitudinal direction of the cargo box; a center frame extending in the longitudinal direction between the first outside frame and the second outside frame, The center frame includes a plate-like vertical wall portion that protrudes upward from the lower surface of the floor board and extends in the longitudinal direction, The packing box has a top wall facing the floor board, A base frame structure configured so that the spaces on one side and the other side of the cargo box divided by the center frame are connected by an open area formed by the upper end of the center frame and the top wall of the cargo box.

3. A base frame structure supporting a floor board of a cargo box, The base frame structure comprises: a first outside frame extending in a longitudinal direction at one side end; a second outside frame extending in the longitudinal direction at the other side end; a front member connecting the first outside frame and the second outside frame at a front end side in the longitudinal direction of the cargo box; a rear member connecting the first outside frame and the second outside frame at a rear end side in the longitudinal direction of the cargo box; a center frame extending in the longitudinal direction between the first outside frame and the second outside frame, The center frame includes a plate-like vertical wall portion that protrudes upward from the lower surface of the floor board and extends in the longitudinal direction, A base frame structure in which a horizontal portion extending in the longitudinal direction is formed at at least one of the upper and lower ends of the vertical wall portion.

4. A base frame structure as described in claim 2 or 3, in which a plurality of cross members are arranged between the first outside frame and the second outside frame, perpendicular to and penetrating the center frame.

5. A base frame structure as described in claim 1 or 4, wherein the floor panel of the cargo box is supported by any one of the following components: the front member, the rear member, the first outside frame, the second outside frame, the center frame, and the cross member.

6. The floor board of the cargo box is supported by any one of the front member, the rear member, the first outside frame, the second outside frame, the center frame, and the cross member; The packing box has a top wall facing the floor board, The space on one side and the space on the other side within the packing box divided by the center frame are configured to communicate with each other through an open area formed by the upper end of the center frame and the top wall of the packing box, 2. The base frame structure according to claim 1, wherein a horizontal portion extending in the longitudinal direction is formed at at least one of the upper end and the lower end of the vertical wall portion.

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