Fixed structure

Abstract

To provide a fixing structure etc. that can suitably connect and fix base iron plates.SOLUTION: A fixing structure 10 connects and fixes base iron plates 1 to each other. The fixing structure 10 has a flat bar 12 that extends so as to straddle adjacent base iron plates 1 and is placed only on the top surface of the base iron plates 1, and bolts 13 that are inserted into holes 121 at the end parts of each flat bar 12 on the side of each base iron plate 1 and fastened to screw holes 11 provided in each of the adjacent base iron plates 1. Threaded inserts 111 are mounted on the threaded holes 11, and the shaft portion of the bolts 13 are screwed into the female threads on the inner surface of the threaded inserts 111.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fixing structure for laid steel plates and the like.

Background Art

[0002] At construction sites, steel plates are laid in various locations within the site. If the laid steel plates are used as they are placed side by side without being fixed to each other, the laid steel plates may shift or rattle as heavy machinery or vehicles pass over them, which becomes a cause of occupational accidents.

[0003] For this reason, displacement prevention is achieved by connecting and fixing the laid steel plates to each other, and such methods include welding a flat bar to adjacent laid steel plates, and fixing adjacent laid steel plates to each other with fixing members.

[0004] Patent Documents 1 to 3 disclose examples of such fixing members. For example, Patent Document 1 describes that adjacent laid steel plates are sandwiched between two upper and lower flat bars, and bolts are passed through holes drilled in both flat bars and the laid steel plates for tightening.

[0005] Further, Patent Document 2 describes that adjacent laid steel plates are sandwiched from above and below on both sides of a metal fitting body having a laterally oriented H-shape, and the laid steel plates are bitten and secured by bolts or the like screwed into the metal fitting body.

[0006] Patent Document 3 describes a connector that includes: a connector body having a U-shaped cross section that sandwiches, from above and below, side end faces orthogonal to the end faces of both laid steel plates in a state where the opposing end faces of adjacent laid steel plates are in contact with each other; a wedge member driven between the connector body and both laid steel plates; and a bolt that fixes the wedge member to the connector body.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

[0008] When connecting and fixing steel plates together by welding flat bars, the welding process is time-consuming and requires the work to be performed by qualified personnel. Furthermore, when returning the steel plates to the leasing company, the flat bars must be removed and the welded areas polished, incurring additional return maintenance costs.

[0009] The fixing members described in Patent Documents 1 and 2 have a portion that is placed on the underside of the steel plate, so at least a portion of the fixing members must be installed when laying the steel plate, which increases the time required for laying the steel plate. Furthermore, if the fixing members come loose or are damaged, it is necessary to move the steel plate with a crane and redo the installation of the fixing members and laying the steel plate. In addition, the fixing members described in Patent Document 3 have the problem that the installation location is limited to the side end surface of the steel plate.

[0010] This invention has been made in view of the above-mentioned problems, and aims to provide a fixing structure, etc., that can suitably connect and fix steel plates. [Means for solving the problem]

[0011] The present invention, which solves the aforementioned problems, Having uneven surfaces A fixing structure for connecting and securing steel plates placed on the ground, comprising: a steel plate extending to straddle adjacent steel plates and positioned only on the upper surface of the steel plates; and bolts inserted into holes at the ends of the steel plate side of the steel plate and fastened to screw holes provided in each steel plate, wherein the steel plate is elastic, Due to its elasticity, it deforms in response to the unevenness and follows the unevenness. This is a fixed structure characterized by the following features. The head of the bolt is, for example, dome-shaped with a smooth convex upper surface.

[0012] According to the fixing structure of the present invention, after laying the steel plates, it is only necessary to install the steel plates on top of the adjacent steel plates and fasten them to each steel plate with bolts, eliminating the need for work during the laying of the steel plates. Therefore, the laying of steel plates can be done quickly. Furthermore, the position of the steel plates is not particularly limited, and unlike welding, no special qualifications are required to attach the steel plates. Moreover, the steel plates and bolts can be easily attached, and safety during work is high. When returning the steel plates to the leasing company, the steel plates can be easily returned to their original state by removing the steel plates and bolts, and no maintenance costs are required. Furthermore, even if the steel plates or bolts are damaged, the original state can be easily and quickly restored by simply replacing the steel plates, etc., without having to move the steel plates with a crane, and it is possible to carry out the restoration work while the steel plates are still in use.

[0013] Preferably, the holes in the steel plate are elongated holes in the direction of extension of the steel plate. This allows the arrangement of the steel plates to accommodate slight deviations in the spacing of the steel plates, meaning the steel plates only need to be laid with a certain degree of precision, allowing the installation work to be completed in a short amount of time.

[0014] It is also desirable that a cylindrical member having an internal thread on its inner surface be fitted into the screw hole, and that the shaft of the bolt be screwed into the internal thread on the inner surface of the cylindrical member. The cylindrical member described above can be used to protect female threads and screw holes, and by simply replacing the cylindrical member with a new one, the screw holes can be kept in a wear-free state at all times, and the steel plates can be reused. [Effects of the Invention]

[0015] The present invention provides a fixing structure and the like that can suitably connect and secure steel plates. [Brief explanation of the drawing]

[0016] [Figure 1] A diagram showing steel plate 1. [Figure 2] A diagram showing the fixed structure 10. [Figure 3] A diagram showing the screw hole 11. [Figure 4] A view showing the screw insert 111. [Figure 5] A view explaining a laying method for the laid steel plate 1 using the fixing structure 10.

Description of Embodiments

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

[0018] (1. Fixing Structure 10) FIG. 1(a) is a plan view of the laid steel plate 1, which is the application target of the fixing structure 10 according to the embodiment of the present invention. As shown in FIG. 1(b), the laid steel plates 1 are laid side by side vertically and horizontally within the construction site, to serve as traveling paths for heavy machinery and vehicles, or for ground curing.

[0019] As shown in FIG. 1(a), the laid steel plate 1 is formed with screw holes 11 used for connecting and fixing adjacent laid steel plates 1 to each other. Adjacent laid steel plates 1 are connected and fixed using these screw holes 11, with a flat bar 12 (steel plate) and bolts 13 as shown in FIG. 1(b). The screw holes 11 of the laid steel plate 1, the flat bar 12, the bolts 13 and the like constitute the fixing structure 10 of the present embodiment.

[0020] FIG. 2(a) shows a vertical cross-section taken along line A-A of the fixing structure 10 in FIG. 1(b), and FIG. 2(b) is a top view of the fixing structure 10 in FIG. 2(a).

[0021] In this embodiment, adjacent steel plates 1 are arranged with a gap between them, and flat bars 12 are placed on the upper surfaces of both steel plates 1, extending across them. Holes 121 are provided at the ends of the flat bars 12 on each steel plate 1 side. These holes 121 are elongated holes in the direction of extension of the flat bars 12. The direction of extension of the flat bars 12 corresponds to the left-right direction in Figures 2(a) and (b). The flat bars 12 are positioned so that the planar positions of these holes 121 correspond to the screw holes 11 of the steel plates 1. Furthermore, the flat bars 12 are placed only on the upper surfaces of the steel plates 1 and not on the lower surfaces of the steel plates 1.

[0022] By inserting the shaft of the bolt 13 into the hole 121 above the flat bar 12 and fastening the shaft to the screw hole 11 of each steel plate 1, adjacent steel plates 1 are connected and fixed by the fixing structure 10. Due to its elasticity, the flat bar 12 can easily conform to uneven ground such as the ground below the steel plates 1, and the fixing structure 10 can be used even on deformed ground (slope sections).

[0023] In this embodiment, a screw insert 111 is mounted on the inner surface of the screw hole 11, and the shaft of the bolt 13 is screwed into the inner surface of the screw insert 111. The screw insert 111 is a component that is mounted in the screw hole 11 and used for purposes such as female threading or protection of the screw hole 11, and in this embodiment, it is a metal coil-shaped cylindrical member having female threads on its inner surface.

[0024] (2. Method for laying steel plates 1 using the fixed structure 10) Next, a method for laying the steel plates 1 using the fixing structure 10 will be described. In this embodiment, as a preliminary preparation for the steel plates 1, as shown in Figure 3(a), holes are made in the necessary locations on the steel plates 1 to create screw holes 11 with female threads on the inner surface. Figure 3(b) shows the upper part of these screw holes 11.

[0025] Next, as shown in Figure 4(a), a screw insert 111 is installed on the inner surface of the prepared screw hole 11. Figure 4(b) shows the upper part of the screw hole 11 with the screw insert 111 installed.

[0026] Then, the steel plates 1, with the screw inserts 111 attached, are laid out in a row as shown in Figure 5(a). After laying a certain number of steel plates 1, adjacent steel plates 1 are connected and fixed together using the fixing structure 10.

[0027] In this process, as shown in Figure 5(b), a flat bar 12 is installed on top of the steel plates 1 so as to straddle adjacent steel plates 1. Then, as shown in Figure 2, the shafts of bolts 13 are passed through each hole 121 on top of the flat bar 12, and these shafts are screwed into the screw inserts 111 of the screw holes 11 of each steel plate 1. This connects and fixes adjacent steel plates 1 together with the fixing structure 10, preventing the steel plates 1 from sliding when heavy machinery or vehicles pass over them, suppressing the scattering of pebbles and other debris caused by the flapping of the steel plates 1, and thus preventing industrial accidents. It also prevents the soiling of public roads by mud and other debris adhering to vehicle tires.

[0028] As described above, with the fixing structure 10 of this embodiment, after the steel plates 1 are laid, the flat bars 12 are installed on top of the adjacent steel plates 1 and fastened to each steel plate 1 with bolts 13, eliminating the need for work during the laying of the steel plates 1. Therefore, the steel plates 1 can be laid quickly. Furthermore, the position of the flat bars 12 and the like is not particularly limited, and unlike welding, no special qualifications are required to install the flat bars 12 and the like.

[0029] Furthermore, the flat bars 12 and bolts 13 can be easily attached, ensuring high safety during operation. Also, when returning the steel plate 1 to the leasing company, the steel plate 1 can be easily returned to its original state by removing the flat bars 12 and bolts 13, eliminating the need for maintenance costs. Moreover, even if the flat bars 12 or bolts 13 are damaged, the steel plate 1 can be easily and quickly restored to its original state simply by replacing the flat bars 12, etc., without having to move the steel plate 1 with a crane or other means, and it is possible to carry out the restoration work while the steel plate 1 is still in use.

[0030] Furthermore, since the holes 121 in the flat bar 12 are elongated holes in the direction of extension of the flat bar 12, the arrangement of the flat bars 12 can accommodate slight deviations in the spacing of the steel plates 1. Therefore, the steel plates 1 only need to be arranged with a certain degree of precision, and the laying work can be completed in a short time.

[0031] Furthermore, since screw inserts 111 are fitted into the screw holes 11 of the steel plate 1, the screw inserts 111 can be used to protect the female threads and screw holes 11, and by simply replacing the screw inserts 111 with new ones, the screw holes 11 can always be kept in a wear-free state, making it possible to reuse the steel plate 1.

[0032] However, the present invention is not limited to the embodiments described above. For example, a recess can be formed around the hole 121 of the flat bar 12, and the head of the bolt 13 can be housed in the recess. This prevents the tracks (caterpillar tracks) of heavy machinery from catching on the head of the bolt 13 and causing the bolt 13 to shift. Making the head of the bolt 13 dome-shaped or dish-shaped with a smooth convex upper surface is also effective in preventing snagging, and these heads can also be housed in the recess formed around the hole 121. A hexagonal hole (not shown) is provided in these heads, and the bolt 13 can be fastened using a wrench or other tool by utilizing the hexagonal hole.

[0033] In this embodiment, the holes 121 in the flat bar 12 are elongated holes, but it is also possible to provide circular holes instead of elongated holes. Furthermore, even when providing elongated holes, their direction is not limited to the extension direction of the flat bar 12. In addition, it is possible to fix each end of the flat bar 12 to the steel plate 1 with multiple bolts 13, and the arrangement and other aspects can be determined in various ways. In this embodiment, the flat bar 12 is used in the fixing structure 10 of the steel plate 1, but other steel plates can be used instead of the flat bar 12, and their planar shape and other aspects are not particularly limited.

[0034] In this embodiment, a screw insert 111 is fitted into the screw hole 11, but instead, another cylindrical member having an internal thread, such as an insert nut, can be fitted into the screw hole 11. Alternatively, the screw insert 111 may be omitted, and the shaft of the bolt 13 may be screwed directly into the internal thread on the inside of the screw hole 11.

[0035] In this embodiment, as shown in Figure 1(b), two fixing structures 10 are formed at each corner of the rectangular steel plate 1, and a fixing structure 10 is formed at the center of each of the pair of long sides of the steel plate 1, thereby forming 10 fixing structures 10 per steel plate 1. However, the number and arrangement of the fixing structures 10 are not particularly limited and will vary depending on the shape and dimensions of the steel plate 1.

[0036] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea disclosed herein, and these will naturally also fall within the technical scope of the present invention. [Explanation of Symbols]

[0037] 1: Steel plate 10:Fixed structure 11: Screw hole 12: Flat bar 13: Bolt 111: Screw insert 121: Hole

Claims

1. A fixing structure for connecting and fixing steel plates laid on uneven ground, A steel plate that extends across adjacent steel plates and is positioned only on the upper surface of the steel plates, A bolt is inserted into a hole at the end of each steel plate on the side of the steel plate and fastened to a screw hole provided in each steel plate. It has, The steel plate is elastic, and the fixing structure is characterized in that it deforms due to the unevenness caused by this elasticity, thereby conforming to the unevenness.

2. The fixing structure according to claim 1, characterized in that the head of the bolt is dome-shaped with a smooth convex upper surface.

3. A cylindrical member having an internal thread on its inner surface is fitted into the screw hole. The fixing structure according to claim 1, characterized in that the shaft portion of the bolt is screwed into the female thread on the inner surface of the cylindrical member.

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