Plane forming jig, road structure, and road construction method

Abstract

To provide a versatile plane forming jig capable of coping with various members, a road structure using the plane forming jig, and a road construction method using the plane forming jig.SOLUTION: A plane-forming jig 10 includes a rotary shaft 12 penetrating through the center, an upper ring 13 on which a forward screw is formed on an inner surface facing the rotary shaft 12, a lower ring 15 on which a reverse screw is formed on an inner surface facing the rotary shaft 12, a rotation suppressing plate 14 which is provided between the respective rings 13, 15 and suppresses the rotation of the plane forming jig 10 itself, and a synchronizing pin 11 which synchronizes actions in the respective rings 13,15. On the upper ring 13, the corners of four blocks of a flat plate shape forming a road surface are placed. In the upper ring 13, the rotary shaft 12 moves up and down from the gap between the blocks according to the rotation operation, whereby the height of the block placed on the upper ring 13 is adjusted.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a flat surface forming jig, a road structure, and a road construction method, and in particular to the formation of a structure whose surface is made flat by laying members. [Background technology]

[0002] Commonly known examples of structures in which multiple components are laid on a base material include paved roads made of interlocking blocks and roads made of precast concrete slabs. Even when laying multiple components, it is naturally desirable for the road surface to be flat. To achieve this, a mechanism capable of adjusting the height of the multiple components is required. Conventional road construction methods generally involve laying a layer of sand or similar underneath the components to adjust the height of the multiple components.

[0003] However, since it is difficult to further adjust the height after the components have been laid, in recent years various methods have been proposed that allow the height to be adjusted even after multiple components have been laid on a substrate (Patent Documents 1 to 5). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-73869 [Patent Document 2] Japanese Patent Application Publication No. 2019-78065 [Patent Document 3] Japanese Patent Application Laid-Open No. 2002-339315 [Patent Document 4] Japanese Patent Publication No. 2020-200684 [Patent Document 5] Patent Publication Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the prior art, in order to lay a component in a predetermined location, it was necessary to perform some kind of specialized processing on the component or the installation location. In other words, there were restrictions such as the component and the installation location being made as a pair, and only specialized components could be used. This made it difficult to achieve versatility.

[0006] The present invention aims to provide a versatile planar forming jig that can be used with a variety of components, a road structure that uses this planar forming jig, and a road construction method that uses this planar forming jig. [Means for solving the problem]

[0007] The plane forming jig of the present invention is a plane forming jig that is placed on the installation surface of a structure whose surface is flat when multiple components are laid out, and is characterized by having a height adjustment mechanism that moves the components up and down in response to rotational operation through the gap between the adjacent components when the corners of the components are placed on the surface, and a rotation prevention mechanism that prevents the plane forming jig from rotating in response to rotational operation of the height adjustment mechanism.

[0008] The height adjustment mechanism is also characterized by comprising a movable part on the top of which the corners of the adjacent members are placed, and a rotating shaft that moves the movable part up and down in response to rotational operation.

[0009] The rotation suppression mechanism is characterized in that it is formed by forming a part of the flat surface forming jig so that the cross section has a shape other than a perfect circle.

[0010] The road structure of the present invention is characterized in that it comprises the plane-forming jig described in the above invention, and the members are flat blocks that form the road surface of the structure, which is the road, and are formed by laying multiple blocks on multiple plane-forming jigs arranged on the roadbed, which is the installation surface.

[0011] A partition plate is also provided between the adjacent members.

[0012] The block is also characterized by having a filler injection hole that penetrates from the road surface side to the roadbed side.

[0013] The road construction method of the present invention is characterized by including the steps of scattering the planar forming jigs described in the above invention according to the size of the flat blocks to be laid on the road, forming a road surface by placing the blocks so that the corners of the blocks abut the tops of the planar forming jigs at corresponding positions, adjusting the road surface to be planar by operating the height adjustment mechanism of the planar forming jigs, and injecting filler into the gaps between the blocks and the roadbed.

[0014] The method further includes a step of attaching partition plates between adjacent blocks so that they stand on the roadbed before injecting the filler.

[0015] The method further includes a step of covering the flat surface forming jig with a cover before injecting the filler. [Effects of the Invention]

[0016] According to the invention as set forth in claim 1, it is possible to provide a versatile flat surface forming jig that can be used with a variety of members.

[0017] According to the invention as set forth in claim 2, the height of the member can be adjusted by rotating the rotation shaft even after the member has been placed on the flattening jig.

[0018] According to the invention as set forth in claim 3, the flat surface forming jig itself can be prevented from rotating by being brought into contact with members around the flat surface forming jig.

[0019] According to the invention as set forth in claim 4, a road without unevenness can be formed without being limited to a specific material.

[0020] According to the inventions set forth in claims 5 and 8, desired members can be easily removed even after the road has been formed by injecting the filler.

[0021] According to the sixth aspect of the present invention, the filler can be easily injected below the component even after the component is placed on the flattening jig.

[0022] According to the invention as set forth in claim 7, it is possible to construct a flat road using a variety of materials.

[0023] According to the invention described in claim 9, the filler injected below the component can be prevented from entering the flat forming jig, and the integration of the filler with various components can be kept to a necessary minimum. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view showing an embodiment of a flat surface forming jig according to the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the flat surface forming jig shown in FIG. [Figure 3A] FIG. 2 is a schematic perspective view showing a surface of a block according to the present embodiment. [Figure 3B] FIG. 2 is a schematic perspective view showing the back surface of the block in the present embodiment. [Figure 4] FIG. 10 is a perspective view showing an engagement relationship between a flat surface forming jig and a block in the present embodiment. [Figure 5] FIG. 2 is a side cross-sectional view of a road according to the present embodiment. [Figure 6] 3 is a flowchart showing a road construction procedure according to the present embodiment. [Figure 7] FIG. 10 is a perspective view showing the flat surface forming jig with a cover attached in the present embodiment. [Figure 8A] FIG. 1 is a perspective view showing a place where blocks are laid to compare construction methods of this embodiment and a conventional method. [Figure 8B] FIG. 8B is a cross-sectional side view of the field shown in FIG. 8A. [Figure 9]FIG. 10 is a table showing the results of a comparison between the present embodiment and a conventional construction method. [Figure 10] 10A and 10B are diagrams showing an example of the operation of removing a block from a wooden frame in the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0026] Fig. 1 is a perspective view showing an embodiment of a flat surface forming jig according to the present invention, Fig. 2 is an exploded perspective view of the flat surface forming jig shown in Fig. 1.

[0027] The flat surface forming jig 10 in this embodiment is used by being placed on the installation surface of a structure formed by laying out multiple components. Since the surface of each component is flat, the surface of the structure formed by laying out these components will also be flat, i.e., smooth. The components are placed on top of the flat surface forming jig 10, but unevenness can occur on the surface of the structure due to the condition of the installation surface or variations in the thickness of the components. The flat surface forming jig 10 in this embodiment is used to eliminate these unevenness and make the surface of the structure flat.

[0028] In the following explanation, an example will be given in which the plane forming jig 10 is used to form a road. That is, the road corresponds to the aforementioned structure, and the roadbed corresponds to the aforementioned installation surface. The aforementioned members are formed from flat concrete blocks (hereinafter simply referred to as "blocks") with square or rectangular surfaces, such as interlocking blocks and precast concrete road slabs. Since the blocks in this embodiment are assumed to be flat plates with square surfaces, the plane forming jig 10 is arranged in a grid pattern on the roadbed so that each block can be placed on it.

[0029] First, the structure of the flat surface forming jig 10 in this embodiment will be described with reference to FIGS.

[0030] The flat surface forming jig 10 in this embodiment is composed of a pair of synchronization pins 11, a rotating shaft 12, an upper ring 13, a rotation suppression plate 14, and a lower ring 15. The outer shape of the main body of the flat surface forming jig 10, which is mainly formed by the upper ring 13 and the lower ring 15, is cylindrical.

[0031] The plane forming jig 10 in this embodiment is equipped with a height adjustment mechanism that adjusts the height by vertically moving four blocks whose corners are placed on the top of the plane forming jig 10. The height adjustment mechanism in this embodiment is formed by a mechanism in which the upper ring 13 is vertically moved by rotating the rotation shaft 12. Note that the top surface of the plane forming jig 10 is formed by the top surface of the upper ring 13, and therefore the top of the plane forming jig 10 and the top of the upper ring 13 refer to the same part.

[0032] Furthermore, the plane forming jig 10 in this embodiment is equipped with a rotation suppression mechanism that suppresses rotation of the plane forming jig 10 associated with rotation of the rotating shaft 12. The rotation suppression mechanism is provided to prevent the entire plane forming jig 10 from rotating due to rotation about the rotating shaft 12. The rotation suppression mechanism in this embodiment can be formed by forming a portion of the plane forming jig 10 with a cross section that is a shape other than a perfect circle, such as an ellipse or a polygon. In this embodiment, a portion of the plane forming jig 10 described above is located between the upper ring 13 and the lower ring 15, and a rotation suppression plate 14 is provided as a rotation suppression mechanism at a position sandwiched between the upper ring 13 and the lower ring 15. The rotation suppression plate 14 is formed in a square shape, which is an example of a shape other than a perfect circle.

[0033] An elongated hole 12a is formed at the top of the rotating shaft 12. When the plane forming jig 10 is placed on the roadbed and the corner of a block is placed on the plane forming jig 10, a tool such as a screwdriver or a dedicated tool is inserted into the elongated hole 12a through the gap in the block and turned, the rotating shaft 12 rotates relative to each of the rings 13 and 15, whose rotation is prevented.

[0034] The upper ring 13 and the lower ring 15 form the main part of the body of the flat surface forming jig 10. The diameters of the upper ring 13 and the lower ring 15 do not need to be the same, but there is no particular need for them to be different, so in this embodiment they are formed with the same diameter. Through holes 13a and 15a, through which the rotating shaft 12 passes, are formed in the centers of the upper ring 13 and the lower ring 15, respectively. The inner diameter of the through holes 13a and 15a is the same as the outer diameter of the rotating shaft 12, and threads are formed to mesh with the threads formed on the outer periphery of the rotating shaft 12.

[0035] The threads are forward threads at the portion where the rotating shaft 12 and the upper ring 13 engage, and reverse threads at the portion where the rotating shaft 12 and the lower ring 15 engage. As a result, the corners of the placed block rest on the top of the upper ring 13, and the upper ring 13 can function as a movable part that moves up and down in response to the rotation of the rotating shaft 12. That is, when the rotating shaft 12 is rotated in a predetermined direction, i.e., clockwise (right-handed), the upper ring 13 moves upward and the lower ring 15 moves downward. That is, the upper ring 13 moves in a direction away from the lower ring 15 relatively, thereby lifting the placed block upward. On the other hand, when the rotating shaft 12 is rotated counterclockwise (left-handed), the upper ring 13 moves downward and the lower ring 15 moves upward. That is, the upper ring 13 moves in a direction toward the lower ring 15 relatively, thereby lowering the placed block. In this way, by reversing the direction of the formed screws, the upper ring 13 and the lower ring 15 can move relative to each other, thereby allowing the block placed on the upper ring 13 to move up and down.

[0036] The forward and reverse threads formed on the rings 13, 15 and the rotating shaft 12 may be reversed. In this case, the direction in which the upper ring 13 moves up and down relative to the lower ring 15 by the rotation operation is reversed.

[0037] Similar to the rings 13 and 15, a through hole 14a through which the rotating shaft 12 passes is formed at the center of the rotation suppression plate 14. The inner diameter of the through hole 14a is the same as or slightly larger than the outer diameter of the rotating shaft 12. No threads are formed on the inner diameter of the through hole 14a so that it does not rotate in conjunction with the rotation of the rotating shaft 12.

[0038] The upper ring 13, the rotation suppression plate 14, and the lower ring 15 have synchronization holes 13b, 14b, and 15b formed in positions that are symmetrical and facing each other about their respective centers. Synchronization pins 11 are inserted into the synchronization holes 13b, 14b, and 15b. The synchronization pins 11 prevent the upper ring 13, the rotation suppression plate 14, and the lower ring 15 from shifting position when the rotating shaft 12 rotates. In other words, the synchronization pins 11 fix the upper ring 13, the rotation suppression plate 14, and the lower ring 15 so that they do not rotate in conjunction with the rotation of the rotating shaft 12. The synchronization pins 11 then allow the upper ring 13 and the lower ring 15 to move in synchronization.

[0039] As will be described later, filler such as grout is injected into the gap between the placed block and the roadbed during road construction. In other words, the block and roadbed are normally integrated by the filler, so the planarizing jig 10 does not bear the entire load of the block. Therefore, it is sufficient for the planarizing jig 10 to have the durability and strength to withstand the load applied during height adjustment and the load applied when the filler hardens. In this embodiment, it is assumed that the planarizing jig 10 is made of SUS304, but it may also be made, for example, by injection molding using a polymer material as the raw material.

[0040] FIG. 3 is a schematic perspective view of a block 30 in this embodiment, with FIG. 3A showing the front surface of the block 30 and FIG. 3B showing the back surface of the block. FIG. 4 is a perspective view showing the engagement relationship between the plane-forming jig 10 and the block 30 in this embodiment. The corners of four blocks 30 are placed on the plane-forming jig 10, but one of the placed blocks 30 is omitted in the illustration to make the engagement relationship easier to understand. FIG. 5 is a side cross-sectional view of a road formed by injecting filler, cut at the joints between the blocks 30, in other words, at the center of the plane-forming jig 10. Note that FIG. 5 only shows the area where the plane-forming jig 10 is installed.

[0041] The block 30 is formed in the shape of a flat plate with a square surface. For example, the block 30 is formed to be 498 mm x 498 mm and 10 mm thick. The four corners of the back surface of the block 30 each have a notch 32 formed to match the square shape of the rotation suppression plate 14. The corners of the four blocks 30 are placed on the top of the plane forming jig 10, and the notches 32 at the corners of the four placed blocks 30 align to form a square recess of the same size as the rotation suppression plate 14. Each block 30 is placed on the plane forming jig 10 so that the respective notches 32 align with the corners of the rotation suppression plate 14. As a result, the rotation suppression plate 14 of the plane forming jig 10 fits into the recess formed by the four placed blocks 30. This structure prevents rotation of the plane forming jig 10 itself. The recess is formed to a size that can accommodate the plane forming jig 10, for example, 61 mm x 61 mm and a depth of 41 mm. The bottom surface of the recess abuts against the top of the plane forming jig 10. In this embodiment, it is not necessary to fix the block 30 and the plane forming jig 10 with fixing means such as screws.

[0042] A filler injection hole 34 is formed in the square center of the block 30, penetrating from the road surface side to the roadbed side. A filler such as grout is injected through the filler injection hole 34 between the back surface of the block 30 and the roadbed. The filler injection hole 34 is formed with a diameter of 25 mm on the road surface side, for example. A recess 36 is also formed in the back surface of the block 30 to reduce resistance when injecting the filler.

[0043] Furthermore, a partition plate 40 is attached to the gap that is created between adjacent blocks 30 when they are placed on the plane forming jig 10. The partition plate 40 is installed so as to fit between the blocks 30 and stand on the roadbed.

[0044] Next, the road construction procedure in this embodiment will be described with reference to the flowchart shown in FIG.

[0045] First, as described above, the corners of the four blocks 30 are placed on the plane forming jigs 10, and the plane forming jigs 10 are scattered on the roadbed being compacted according to the sizes of the blocks 4. In this embodiment, the blocks 30 are formed in a square shape, so the plane forming jigs 10 are arranged in a grid pattern (step S110).

[0046] In a later process, filler will be injected between the back surface of the block 30 and the roadbed. If the planarization jig 10, particularly the rings 13 and 15, were installed in an exposed state, the filler injected into the gap between the planarization jig 10 and the block 30 would harden, integrating the planarization jig 10 and the block 30 through the filler, making it difficult to remove the block 30. Therefore, in this embodiment, a cover 42 is attached to cover the side of the planarization jig 10 before the filler is injected (step S120). A perspective view of the planarization jig 10 with this cover 42 attached is shown in FIG. 7. This cover 42 minimizes the amount of filler that is required to integrate the planarization jig 10 and the block 30.

[0047] Next, each block 30 is placed so that the notches 32 at the corners of the block 30 abut against the top of the plane forming jig 10 placed in the corresponding position, and are positioned at the corners of the rotation suppression plates 14 (step S130). In this way, the road surface is formed.

[0048] As described above, in this embodiment, the blocks 30 that will form the road are simply placed on the plane forming jig 10 and do not need to be fixed with screws, etc. Therefore, processes such as aligning screw holes and tightening screws to fix the blocks 30 to the plane forming jig 10 are not required.

[0049] Although a road is formed as described above, simply placing the blocks 30 on the plane forming jig 10 may result in insufficient flattening of the roadbed, or the spacing between the rings 13, 15 of the plane forming jig 10 may be uneven when placed on the roadbed, and the road surface formed by laying multiple blocks 30 may not necessarily be flat. Therefore, in this embodiment, the height of the blocks 30 is adjusted as follows to flatten the road surface (step S140).

[0050] For example, the plane forming jigs 10 positioned at the four corners of a block 30 (hereinafter referred to as the "reference block 30") that is set to the correct height or that has been set to the correct height can be considered to be adjusted to the correct height. By adjusting the height of other plane forming jigs 10 on which the corners of blocks 30 other than the reference block 30 placed on the correctly adjusted plane forming jig 10 are placed, the heights of the blocks 30 (hereinafter referred to as the "adjacent blocks 30") positioned around the reference block 30 are adjusted. This makes the road surface formed by the reference block 30 and the adjacent blocks 30 flat. The adjacent blocks 30 can then be used as the reference block 30. By repeating this height adjustment process, the entire road surface can be flattened.

[0051] As mentioned above, the height of each block 30 can be adjusted by inserting a tool into the long hole 12a at the top of the rotating shaft 12 of the plane forming jig 10 through the gap between the blocks 30 and rotating the rotating shaft 12 in the desired direction.

[0052] Depending on the adjusted height, in other words, the amount of rotation of the rotating shaft 12, it may be possible for the bottom surface of the rotating shaft 12 to reach the roadbed. To avoid this, for example, the height (also called "thickness") of the lower ring 15 may be increased, or the cover 42 may be formed into a box shape so that it covers the bottom surface of the plane forming jig 10.

[0053] As described above, in this embodiment, by providing a rotation suppression mechanism (in this embodiment, the "rotation suppression plate 14") having a shape other than a perfect circle, the main body of the flat surface forming jig 10 can be prevented from rotating in conjunction with the rotation of the rotating shaft 12. The rotation suppression plate 14 is provided in this embodiment because the main body of the flat surface forming jig 10 (i.e., each ring 13, 15) is formed in a cylindrical shape. In other words, if at least one of the rings 13, 15 has a portion whose cross section is not a perfect circle, a part of the flat surface forming jig 10 that is not a perfect circle will be formed, and the rotation suppression plate 14 will be unnecessary. In other words, for example, the upper ring 13 may be formed integrally with the rotation suppression plate 14, so that the upper ring 13 functions as a rotation suppression mechanism. This eliminates the need for the rotation suppression plate 14. Alternatively, the upper ring 13 may be made unnecessary by providing a screw on the inner surface of the through hole 14a in the rotation suppression plate 14.

[0054] In addition, in this embodiment, the notches 32 at the corners of the back surfaces of the four blocks are fitted together to form a square recess in accordance with the shape of the square rotation prevention plate 14, but the shape of the notches 32 may also be determined according to the shape of the rotation prevention mechanism.

[0055] Next, before the filler is injected, the partition plates 40 are attached between the adjacent blocks 30 (step S150). The partition plates 40 are inserted to a position where they will stand on the roadbed.

[0056] Thereafter, the filler is injected through the filler injection holes 34 onto the back side of the block 30 (step S160). At this time, adjacent blocks 30 are separated by partition plates 40, so the filler injected through the filler injection holes 34 does not flow out into the other blocks 30. Thereafter, the filler may be filled so that the filler injection holes 34 are filled and also on top of the partition plates 40, thereby making the road more even.

[0057] The road can be formed according to the construction procedure described above. As described above, according to this embodiment, the blocks 30 can be simply placed on the plane forming jig 10, and there is no need to fix them with screws or the like. This eliminates the need for a process for fixing the blocks 30, thereby shortening the construction work.

[0058] Next, advantages of the road structure and construction method characteristic of this embodiment will be explained in comparison with the prior art.

[0059] FIG. 8A is a perspective view of a section 50 where blocks were laid to compare construction methods, and FIG. 8B is a side cross-sectional view showing the ground inside the section 50 shown in FIG. 8A. Sections 50 were set up to correspond to the blocks of this embodiment (hereinafter also referred to as "prototype concrete blocks") and conventional interlocking blocks. Each section 50 was formed by digging a 1.6 m x 1.6 m area of ​​wilderness soil 52 to a depth of 0.25 m, laying 0.13 m of crushed stone 54 as the roadbed material, and compacting it. The area that would become section 50 was then enclosed by a wooden frame 56. Within this wooden frame 56, prototype concrete blocks made for comparison and conventional interlocking blocks were laid in each section 50. This laying work was carried out, and the work time was measured. The measurement results are shown in FIG. 9. The conventional interlocking blocks were made by processing Strong Pave SP85-21 (495mm x 795mm x 100mm) manufactured by Nippon Kogyo Co., Ltd. to 495mm x 495mm x 100mm.

[0060] Conventional road construction procedures include the following steps: First, the main preparatory work for laying blocks includes "sand preparation," which involves transporting sand onto the roadbed within the wooden frame 56; "leveling," which sets the height standards for the sand and blocks; "sand leveling," which flattens the sand; and "sand compaction," which makes the sand density uniform. Another main laying work involves "block laying, height and joint adjustment," which involves laying blocks while adjusting the gaps between them to form the pavement.

[0061] In the road construction process of this embodiment, the conventional preparatory work for laying is not required. Furthermore, the laying work naturally requires "laying blocks and adjusting height and joints" as in the conventional case, but the construction work is different. Therefore, in this embodiment, the laying work is divided into "installation of the planar forming jig, blocks, and partition boards" in which the planar forming jig 10, blocks 30, and partition boards 40 are installed, "joint adjustment" in which the joints are adjusted, and "height adjustment" in which the planar forming jig 10 is operated to adjust the height.

[0062] As can be seen from a comparison of the time required to lay each block (the "cumulative time" shown in Figure 9) shown in Figure 9, the road structure of this embodiment can reduce the time required to lay the blocks. Specifically, the time required for laying the blocks can be reduced by about 2.5 times.

[0063] However, there may be cases where the blocks laid as described above need to be removed and reattached for maintenance work such as replacement.

[0064] Conventional interlocking blocks are bound by interlocking blocks on all four sides and cannot be removed individually. Therefore, it is necessary to destroy the block itself. If the interlocking block to be removed contains a sensor or other device that is easily damaged or expensive and needs to be replaced without destroying it, it is necessary to destroy the surrounding interlocking blocks that do not contain the sensor, creating a gap and then removing the interlocking block to be removed.

[0065] In contrast, in the present embodiment, the blocks 30, roadbed 2, and plane-forming jig 10 located on all four sides are integrated with a filler such as grout. However, partition plates 40 are inserted between the blocks 30, and the integration of the sides of the blocks 30 with the filler is kept to a minimum. Furthermore, the plane-forming jig 10 is covered with a cover 42, which prevents the filler from entering the plane-forming jig 10 and minimizes the integration of various components with the filler. This minimizes the integration of the plane-forming jig 10 and the block 30 with the filler. Therefore, for example, the block 30 to be removed can be easily removed by impacting the four sides with a hammer or the like, creating cracks in the minimally connected filler, which separates the filler adhering to the partition plates 40 from the filler adhering to the plane-forming jig 10.

[0066] Figure 10 is a diagram showing an example of the work required to remove the block 30 from the wooden frame 56, i.e., from the road. If the filler has been filled into the filler injection hole, the filler must be removed. However, the filler injection hole may also be effectively used for the removal work. That is, as shown in Figure 10, the filler injection hole can be used as a lifting hole, and a rod-shaped lifting tool can be inserted into this lifting hole to lift the block 30, allowing it to be easily removed.

[0067] As described above, according to this embodiment, only the desired block 30 can be easily removed, thereby improving maintainability.

[0068] In this embodiment, notches 32 are provided at the corners of the block 30, and the recesses formed by the notches 32 engage with the rotation suppression plates 14 of the plane forming jig 10 to suppress rotation of the plane forming jig 10 itself. In this manner, the recesses have at least the function of assisting in suppressing rotation of the plane forming jig 10 and the function of preventing displacement of the plane forming jig 10. However, the block 30 can be placed on the plane forming jig 10 even without the notches 32. Alternatively, a rotation suppression mechanism corresponding to the absence of the notches 32 may be provided in the plane forming jig 10.

[0069] The rotation suppression mechanism provided in the flat surface forming jig 10 may be, for example, a separate member formed in a shape such that the upper ring 13 fits into the gap between the blocks 30, for example a cross shape, to suppress the rotation of the rings 13, 15 that rotate synchronously, and on which the block 30 is placed in place of the upper ring 13. Alternatively, a separate member may be provided to prevent the rings 13, 15 from rotating.

[0070] The processing to provide the notch 32 in the block 30 is extremely simple and easy. However, depending on the rotation suppression mechanism provided in the plane forming jig 10 as exemplified above, it may not be necessary to process the block 30 to correspond to the rotation suppression mechanism of the plane forming jig 10, such as the notch 32.

[0071] Furthermore, although the present embodiment has been described using the plane forming jig 10 for roads as an example, the structure does not have to be limited to roads. For example, if this embodiment is applied to a free access floor, the free access floor is the structure, the floorboards are the members, and the plane forming jig can be applied as legs that support the floorboards.

[0072] [Configuration of the present invention] Configuration 1: A flat surface forming jig that is placed on the installation surface of a structure having a flat surface formed by laying a plurality of members, a height adjustment mechanism that moves the adjacent members up and down in response to rotational operation through a gap between the members when the corners of the adjacent members are placed on the members; a rotation suppression mechanism that suppresses rotation of the flat surface forming jig associated with a rotation operation of the height adjustment mechanism; A flat surface forming jig comprising: Configuration 2: The height adjustment mechanism is a movable portion on which the corner portions of the adjacent members are placed; a rotation shaft that moves the movable part up and down in response to a rotation operation; The flat surface forming jig according to configuration 1, comprising: Configuration 3: 3. The flat surface forming jig according to configuration 1 or 2, wherein the rotation suppression mechanism is formed by forming a part of the flat surface forming jig so that the cross section has a shape other than a perfect circle. Configuration 4: A flat surface forming jig according to any one of configurations 1 to 3 is provided, the member is a flat block that forms a road surface of the road that is the structure, The block is formed by laying a plurality of the blocks on a plurality of the plane forming jigs arranged on the roadbed, which is the installation surface. A road structure characterized by: Configuration 5: A road structure according to configuration 4, characterized in that a partition plate is attached between adjacent members. Configuration 6: A road structure according to configuration 4 or 5, characterized in that the blocks are provided with filler injection holes that penetrate from the road surface side to the roadbed side. Configuration 7: A step of distributing the plane forming jig according to any one of configurations 1 to 3 in accordance with the size of the flat block to be laid on the road; a step of forming a road surface by placing the block so that a corner of the block abuts on a top of the plane forming jig at a corresponding position; a step of adjusting the road surface to be flat by operating a height adjustment mechanism of the flat surface forming jig; A step of injecting a filler into the gap between the block and the roadbed; A road construction method comprising: Configuration 8: A road construction method according to configuration 7, characterized in that it includes a step of attaching partition plates between adjacent blocks so that they stand on the roadbed before injecting the filler. Configuration 9: 9. The road construction method according to configuration 7 or 8, further comprising a step of covering the plane forming jig with a cover before injecting the filler. [Explanation of symbols]

[0073] 2 Roadbed, 4 Block, 10 Plane forming jig, 11 Synchronizing pin, 12 Rotating shaft, 12a Slot, 13 Upper ring, 13a, 14a, 15a Through holes, 13b, 14b, 15b Synchronizing holes, 14 Rotation suppression plate, 15 Lower ring, 30 Block, 32 Notch, 34 Filler injection hole, 36 Depression, 40 Partition plate, 42 Cover, 50 Compartment, 52 Wilderness soil, 54 Crushed stone, 56 Wooden frame.

Claims

1. A flat surface forming jig that is placed on the installation surface of a structure having a flat surface formed by laying a plurality of members, a height adjustment mechanism that moves the adjacent members up and down in response to rotational operation through a gap between the members when the corners of the adjacent members are placed on the members; a rotation suppression mechanism that suppresses rotation of the flat surface forming jig associated with a rotation operation of the height adjustment mechanism; A flat surface forming jig comprising:

2. The height adjustment mechanism is a movable portion on which the corner portions of the adjacent members are placed; a rotation shaft that moves the movable part up and down in response to a rotation operation; The flat surface forming jig according to claim 1 , further comprising:

3. 2. The flat surface forming jig according to claim 1, wherein the rotation suppression mechanism is formed by forming a part of the flat surface forming jig so that the cross section has a shape other than a perfect circle.

4. A flat surface forming jig according to claim 1 is provided, the member is a flat block that forms a road surface of the road that is the structure, The block is formed by laying a plurality of the blocks on a plurality of the plane forming jigs arranged on the roadbed, which is the installation surface. A road structure characterized by:

5. 5. The road structure according to claim 4, wherein a partition plate is attached between adjacent members.

6. 5. The road structure according to claim 4, wherein the blocks are provided with filler injection holes that penetrate from the road surface side to the roadbed side.

7. a step of distributing the plane forming jig according to claim 1 in a scattered manner according to the size of the flat block to be laid on the road; a step of forming a road surface by placing the block so that a corner of the block abuts on a top of the plane forming jig at a corresponding position; a step of adjusting the road surface to be flat by operating a height adjustment mechanism of the flat surface forming jig; A step of injecting a filler into the gap between the block and the roadbed; A road construction method comprising:

8. 8. The road construction method according to claim 7, further comprising the step of attaching partition plates to stand on the roadbed between adjacent blocks before injecting the filler.

9. 8. The road construction method according to claim 7, further comprising the step of covering the plane forming jig with a cover before injecting the filler.

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