Floor structure for transporting heavy objects

Abstract

Regarding floor structures for transporting heavy objects, the present invention provides a floor structure that prevents shear force from concentrating on the bolts connecting the blocks when a load is applied, and that prevents the floor surface's load-bearing capacity from becoming excessive for heavy objects. [Solution] The floor structure 10 for transporting heavy objects is formed by stacking two or more rectangular blocks 11, 12 of different sizes, with each block being joined to the others with bolts and nuts, and the arrangement of the blocks includes a section where the block directly above two blocks that are placed side by side at the same height is placed across them.

Description

Technical Field

[0001] The present invention relates to a floor structure for transporting heavy objects constructed for transporting heavy machinery and the like.

Background Art

[0002] When heavy objects such as heavy machinery need to be transported in a factory or the like, the factory may be at a position higher than the ground and may have a step. At this time, since the installation of heavy objects is assumed in the factory, the foundation is firmly constructed, but the ground around the factory may be soft. In such a case, it is necessary to construct a floor surface that can withstand heavy objects on the route for transporting to the factory. And, in order to construct a flat and strong floor surface, generally, blocks and sleepers are stacked, a thick iron plate is laid on top of them, and heavy objects are transported using an electric winch, an electric roller, or the like on the iron plate.

[0003] As the blocks, concrete blocks (Patent Document 1) may be used, but in the case of concrete blocks, although they are strong against compressive force, they are heavy, so there is a problem that it is difficult to transport and install the blocks themselves. Also, if wooden sleepers are used, they are lighter than concrete but have problems with strength and corrosion.

[0004] Therefore, it is conceivable to use iron or aluminum blocks (Patent Document 2), but in the case of iron, there is a problem of rust. If it is used as a temporary floor surface, lightweight and rust-free aluminum blocks are suitable.

[0005] Figure 7 shows an example of a conventional aluminum block as described in Patent Document 2, and Figure 8 illustrates the situation of transporting heavy objects to a factory. This aluminum block 100 is constructed with aluminum profiles 13 for the top and bottom surfaces, and four columns 14 connecting the top and bottom surfaces made of aluminum structural steel. Each component is joined by welding, and the outer shape of the block 100 is a rectangular parallelepiped measuring 200 mm × 300 mm × 400 mm. Bolt holes 15 are provided on each surface for joining adjacent blocks. The profiles 13 used for the top and bottom surfaces are made of flat rectangular pipes with ribs provided inside.

[0006] A typical floor for transporting heavy objects is constructed by stacking blocks 100 joined together with bolts and nuts, as shown in Figure 8, and then laying a steel plate 20 on top. The heavy object 50 is then placed on rollers 30 and transported on the steel plate 20 to the factory 60.

[0007] Here, since the bolt holes 15 drilled in the block 100 are about 1-2 mm larger than the bolt diameter, when the blocks 100 are stacked flat, depending on the shape of the ground, displacements of several millimeters may accumulate, resulting in unevenness on the top surface. Also, if the ground is soft and sinks locally, shear force may concentrate on the bolts connecting adjacent blocks 100. In that case, the load-bearing capacity of the floor structure will be determined by the shear strength of the bolts, and it may not be possible to evaluate it based on the load-bearing capacity of the block 100 itself. Furthermore, when the blocks 100 are stacked flat, the blocks 100 will be stacked without gaps, so depending on the size of the heavy object, the load-bearing capacity may be excessive. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2005-67110 [Patent Document 2] Utility Model Registration No. 3240372 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] In view of these circumstances, the present invention relates to a floor structure for transporting heavy objects, and aims to provide a floor structure that prevents shear force from concentrating on the bolts connecting the blocks when a load is applied, and that does not have excessive load-bearing capacity for heavy objects. [Means for solving the problem]

[0010] The floor structure for transporting heavy objects according to the present invention is formed by stacking two or more rectangular blocks of different sizes, with each block being joined to the others by bolts and nuts, and in the arrangement of the blocks, there are locations where a block is installed directly above two blocks that are placed side by side at the same height.

[0011] Here, among the two or more types of blocks, the size of the first block may be 200mm x 300mm x 400mm, and the size of the second block may be 150mm x 300mm x 400mm.

[0012] Furthermore, the second block may be located at the very top of the floor structure and straddle the two first blocks, and the first or second block may be made of aluminum or carbon fiber. [Effects of the Invention]

[0013] According to the present invention, by using two or more rectangular blocks of different sizes and creating a section where a block is installed directly above two blocks that are placed side by side at the same height, it is possible to create a structure that prevents shear force from concentrating on the bolts connecting adjacent blocks. Furthermore, for heavy objects, by installing a block above two blocks that straddles them, a gap can be created between the blocks, making it possible to design a floor structure that does not have excessive load-bearing capacity. [Brief explanation of the drawing]

[0014] [Figure 1] An example of a block used in the present invention, where (a) is the first block and (b) is the second block. [Figure 2] A diagram for explaining the bolt hole positions of the first block. [Figure 3] An example of a connection using the first block. [Figure 4] Example 1 of the floor structure. [Figure 5] Example 2 of the floor structure. [Figure 6] Example 3 of the floor structure. [Figure 7] An example of a conventional aluminum block. [Figure 8] A diagram for explaining the situation of transporting heavy objects to the factory.

Modes for Carrying Out the Invention

[0015] The present invention relates to a floor structure constructed by stacking blocks for transporting heavy machinery and the like. Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0016] In the present invention, two or more types of rectangular parallelepiped blocks of different sizes will be used. FIG. 1 is an example of a block used in the present invention, where (a) is the first block and (b) is the second block. The first block 11 is a rectangular parallelepiped with an outer shape of 200 mm × 300 mm × 400 mm, and the second block 12 is a rectangular parallelepiped with an outer shape of 150 mm × 300 mm × 400 mm. Note that the sizes of the blocks are not limited to these two types, and a third block or the like with different sizes may be further added and used. Also, these blocks 11 and 12 are preferably made of aluminum or carbon fiber. If made of aluminum, there is no worry of rust, and if made of carbon fiber, the weight of the block can be reduced.

[0017] The basic structure of the first aluminum block 11 consists of a thin rectangular parallelepiped profile 13 on the upper and lower surfaces, and equilateral angle steels are used for the four outer frame columns 14 connecting the profiles 13 to each other. Each member is joined by welding. Incidentally, the centers of the upper and lower surfaces may be connected by cylindrical columns for reinforcement.

[0018] The profiles 13 used for the upper and lower surfaces should preferably be hollow flat angle pipes with ribs provided therein. Such profiles 13 are sometimes called five-flats or ruler angles. Here, the aluminum profiles 13 can be manufactured as extruded materials and have sufficient strength for use on the upper and lower surfaces of the block 11.

[0019] The blocks are joined using bolts and nuts. FIG. 2 is a diagram for explaining the bolt hole positions of the first block. In the first block 11, bolt holes 15 with a diameter of φ12 are drilled in all surfaces. The positions of the bolt holes 15 are determined such that they can be joined regardless of which surfaces of the 200 mm × 300 mm surface, 300 mm × 400 mm surface, and 200 mm × 400 mm surface are combined, and further, they can also be joined across two blocks 11. Incidentally, the diameter of the bolt holes 15 is not limited to φ12. Also, for the second block 12, bolt holes may be provided on the entire surface as well, or when the second block 12 is used at the top of the floor structure, bolt holes may not be provided on the uppermost surface.

[0020] Figure 3 shows examples of connections using the first block. Figure 3(a) shows an example where a 200mm x 300mm surface is joined to a connecting block 16 formed by bolting together the 200mm x 400mm surfaces of two blocks 11, straddling the joining surface 17. Figure 3(b) shows an example where a 200mm x 400mm surface is joined to a 200mm x 300mm surface. Figure 3(c) shows an example where a 300mm x 400mm surface is joined to a connecting block 16 formed by joining two 200mm x 300mm surfaces, straddling the joining surface 17. Figure 3(d) shows an example where two 200mm x 300mm surfaces are joined together, and another 200mm x 300mm surface is joined to the joining block 16 across the joining surface 17, and then another block 11 is joined to the empty space at the end of the joining block 16. Note that the joining examples shown here are only a few examples, and there are countless patterns for joining blocks, so it is possible to freely select stacking methods other than flat stacking depending on the ground conditions and the weight of the heavy objects.

[0021] The floor structure is formed by joining blocks together with bolts and nuts and stacking them. Examples of floor structures are shown below. Figure 4 shows Example 1 of the floor structure. Here, the floor structure 10 is formed to create a road surface 18 that forms two parallel rails so that rollers carrying heavy objects can move back and forth in a straight line. This floor structure 10 is connected using blocks 11 at the second level from the top, which is provided to maintain the shape of the floor structure 10.

[0022] A second block 12 is installed at the very top of the floor structure 10. If the top surface of the second block 12 is flat and free of irregularities such as bolt holes, it becomes unnecessary to lay a steel plate on top of the floor structure 10 as in the conventional method, and the roller can pass directly over the top surface of the second block 12.

[0023] The second block 12 is installed straddling the two first blocks 11. In other words, the joint surfaces of adjacent second blocks 12 are directly above the first blocks 11, so that when a heavy load is placed on them, the structure prevents shear force from concentrating on the bolts joining the second blocks 12 together. Also, since there is a gap between adjacent first blocks 11, the load-bearing capacity of the floor structure 10 is smaller than that of flat stacking, but when the weight of the heavy object is not very large, it can be an appropriate structure that does not result in an over-designed structure.

[0024] Figure 5 shows Example 2 of the floor structure. This floor structure 10 is also formed to constitute two road surfaces 18. A second block 12 is placed at the top of the floor structure 10. The same type of formwork 13 used for the upper and lower surfaces of the first block 11 is stacked and installed in the space created at the end of the road surface 18. The topmost second block 12 is provided straddling the first block 11 located below it. Furthermore, the second row of blocks 11 from the top is provided straddling the third row of blocks 11. Thus, the structure is such that shear force is not concentrated on the bolts connecting the top row of blocks 12 or the bolts connecting the second row of blocks 11. In addition, since the second row of blocks 11 from the top are placed horizontally without gaps, the floor structure 10 is stronger than that of Example 1. Furthermore, since there are gaps between the blocks 11 in the bottom row, the number of blocks 11 can be reduced compared to flat stacking, preventing an excessive design.

[0025] Figure 6 shows Example 3 of the floor structure. This floor structure 10 is also formed to constitute two road surfaces 18. A second block 12 is placed at the top of the floor structure 10. In Example 3, by shifting the third layer from the top by half the length of the block 11 from the flat stacked state, the joint surfaces of adjacent blocks 11 at the same height are shifted for each layer, thus preventing shear force from concentrating on the bolts.

[0026] Examples 1, 2, and 3 described above are merely a few examples of floor structure 10, and there are many other patterns of floor structures. Furthermore, as in Examples 1, 2, and 3, by using two or more types of rectangular blocks of different sizes, and by arranging the blocks so that there are places where the block directly above straddles two blocks placed side by side at the same height, it is possible to create a structure that prevents shear force from concentrating on the bolts connecting adjacent blocks, thus allowing the design to be based on the load-bearing capacity of the blocks themselves. In addition, by arranging the blocks with gaps to accommodate heavy objects, it is possible to design a floor structure that does not have excessive load-bearing capacity. [Explanation of symbols]

[0027] 10 Floor structure 11 (First) Block 12 (2nd) Block 13 Profile material 14 pillars 15 bolt holes 16 Joint Blocks 17 Joint surface 18 Road surface 20 Iron Plates 30 rollers 50 heavy items 60 factories 100 conventional blocks

Claims

1. A floor structure for transporting heavy objects, characterized by being formed by stacking two or more rectangular blocks of different sizes, with each of the blocks being joined together with bolts and nuts, and having a location in the arrangement of the blocks where a block directly above two blocks placed side by side at the same height is installed across them.

2. The floor structure for transporting heavy objects according to claim 1, characterized in that, among two or more types of blocks, the size of the first block is 200 mm x 300 mm x 400 mm and the size of the second block is 150 mm x 300 mm x 400 mm.

3. The floor structure for transporting heavy objects according to claim 2, characterized in that the second block is installed at the top of the floor structure and straddles the two first blocks.

4. The floor structure for transporting heavy objects according to claim 2 or 3, characterized in that the first or second block is made of aluminum or carbon fiber.

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