Antivibration floor, antivibration floor unit, and method of manufacturing antivibration floor unit

Abstract

To provide an antivibration floor which can reduce vibration from a lateral side.SOLUTION: An antivibration floor 40 has planar rectangular lower floor material 50, and antivibration materials 71, 72, 73 provided below the lower floor material 50. Portions of the antivibration material 73 protrude from respective long sides 50A of the lower floor material 50 and respective short sides 50B of the lower floor material 50.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a vibration-isolating floor, a vibration-isolating floor unit, and a method for manufacturing a vibration-isolating floor unit. [Background technology]

[0002] When transporting an object, for example, the object may be placed in a container and the container may be loaded onto a railroad car or truck for transport to the vicinity of the destination. Also, once near the destination, the object may be transferred from the container to a small cart or the like for transport to the destination.

[0003] Here, when the object is a precision instrument or food such as fruit, an anti-vibration floor may be used that combines an anti-vibration material with a floor material to prevent the object from being subjected to vibrations from the floor surface of the container or the floor surface of the dolly during transportation. In such an anti-vibration floor, the anti-vibration material reduces the vibration transmitted from the floor surface of the container or dolly to the floor material, and thus reduces the vibration applied to the object during transportation (Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 2-141335 Summary of the Invention [Problem to be solved by the invention]

[0005] By the way, the vibration-proofing material is arranged on the floor material so that it is flush with the side surface of the floor material or is located inward from the side surface in a plan view. In such a configuration, for example, if the vibration-proofing floor abuts against the side wall of the container or the side wall of the dolly, vibrations from these side walls will be transmitted directly to the floor material without passing through the vibration-proofing material, and there is a risk that the vibration-proofing effect of the vibration-proofing floor will be reduced.

[0006] In view of the above problems, the present invention aims to provide a vibration-isolating floor, a vibration-isolating floor unit, and a method for manufacturing a vibration-isolating floor unit that can also reduce vibrations from the sides. [Means for solving the problem]

[0007] One embodiment of a vibration-isolating floor that solves the above problem is a vibration-isolating floor having a floor material that is rectangular in a plan view and a vibration-isolating material provided beneath the floor material, a portion of which protrudes outward from at least one side of the floor material.

[0008] The floor material is rectangular in plan view, and the vibration-proof materials are provided with portions of them protruding outward from the side surfaces of each long side of the floor material, and the vibration-proof materials are positioned so that they do not overlap in the longitudinal direction of the floor material.

[0009] The vibration-proof material is provided with a portion thereof protruding outward from each short side surface of the floor material. The vibration-proof material is point-symmetric with respect to the intersection of the diagonals of the floor material in a plan view. The vibration-proof material is polyurethane, and the contact surface of the vibration-proof material has a corrugated cross section.

[0010] One embodiment of a vibration-isolating floor unit that solves the above problem comprises a lower floor unit in which multiple vibration-isolating floors are arranged side by side with their long sides facing each other, and an upper floor unit in which multiple upper floor materials that are rectangular in plan view are arranged side by side on top of the lower floor unit, and the boundaries of the multiple vibration-isolating floors and the boundaries of the multiple upper floor materials are in positions that do not overlap in a plan view.

[0011] The vibration-isolating floor and the upper floor material are fastened together by fastening members. One embodiment of a method for manufacturing an anti-vibration unit that solves the above problem includes a step of arranging multiple anti-vibration floors side by side with their long sides facing each other to form a lower floor unit, and a step of arranging multiple upper floor materials that are rectangular in plan view side by side on top of the lower floor unit to form an upper floor unit, wherein when arranging the upper floor materials side by side on top of the lower floor unit, the boundaries of the multiple anti-vibration floors and the boundaries of the multiple upper floor materials are positioned so that they do not overlap in plan view. Effect of the Invention

[0012] According to the vibration-isolating floor of the present invention, vibrations from the sides can also be reduced. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a perspective view of the vibration isolation floor unit of the first embodiment installed in a container. [Diagram 2] A plan view of the vibration isolation floor unit installed inside the container. [Diagram 3] FIG. [Figure 4] Cross-sectional view of an anti-vibration floor unit. [Diagram 5] Rear view of the vibration isolation floor. [Figure 6] Plan view of the vibration-isolating floor. [Figure 7] An explanatory diagram showing the assembly of the lower floor unit. Fig. 7(a) shows the first anti-vibration floor installed in the container, Fig. 7(b) shows the floor abutting against the side wall of the container, Fig. 7(c) shows the second anti-vibration floor installed in the container, Fig. 7(d) shows the second anti-vibration floor abutting against the first, and Fig. 7(e) shows the three anti-vibration floors assembled in the container. [Figure 8] An explanatory diagram showing the assembly of the upper floor unit, FIG. 8(a) showing a second upper floor material installed on the lower floor unit, and FIG. 8(b) showing an upper floor unit installed on the lower floor unit. [Figure 9] FIG. 11 is a side view showing a modified example of the vibration-proof material. [Figure 10] FIG. 11 is a rear view showing an example of changing the position of the vibration-proof material. [Figure 11] Figures 11(a) to 11(d) are plan views showing modified examples of upper floor materials, and Figure 11(e) is a plan view of a vibration-isolating floor unit combining these. [Figure 12] FIG. 13 is a perspective view of a vibration-isolating floor of a second embodiment installed on a cart. [Figure 13] FIG. 13(a) is a rear view of the vibration-isolating floor of the second embodiment, and FIG. 13(b) is a plan view of the same. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] (First embodiment) An embodiment of a vibration-isolating floor unit for a 12-foot container (hereinafter simply referred to as the "vibration-isolating floor unit") 10 embodying the present invention will be described below with reference to Figs. 1 to 8. Note that, for the sake of convenience, specific values ​​are shown below, but these values ​​are merely examples. In addition, the inner diameter of a 12-foot container (hereinafter simply referred to as the "container") 200, as an example of a container 200 for rail transport, is 3587 mm x 2325 mm for the floor surface 201, and approximately 2232 mm in height for the side wall 202.

[0015] Fig. 1 shows a perspective view of a vibration-isolation floor unit 10 installed in a container 200, and Fig. 2 shows a plan view of the same. The vibration-isolation floor unit 10 shown in these figures is installed on the floor surface 201 of the container 200, and is formed in a size that allows for installation within the container 200 with ample space. The vibration-isolation floor unit 10 is configured by stacking an upper floor unit 11 located on the upper side and a lower floor unit 12 located on the lower side in the vertical direction, and further, the upper floor unit 11 and the lower floor unit 12 are fastened together by bolts 80 and nuts 54 shown in Fig. 4. The bolts 80 and nuts 54 form fastening members.

[0016] As shown in an exploded perspective view of the vibration-isolating floor unit 10 in Fig. 3, the upper floor unit 11 and the lower floor unit 12 are each constructed by arranging a plurality of members side by side. Note that in Fig. 3, the bolts 80 that fasten the upper floor unit 11 and the lower floor unit 12 together are not shown.

[0017] (Upper floor unit 11) As shown in Figs. 1 to 3, the upper floor unit 11 is a rectangle in plan view that is long in the left-right direction in Fig. 2, with one side being 3300 mm and the other side being 2200 mm. The upper floor unit 11 is formed by combining two first upper floor materials 20 and two second upper floor materials 30, for a total of four pieces. Hereinafter, for the first upper floor material 20 and the second upper floor material 30, the long sides 20A, 30A (vertical direction in Fig. 2) are referred to as the length, the short sides 20B, 30B (left-right direction in Fig. 2) are referred to as the width, and the direction perpendicular to the long sides 20A, 30A and the short sides 20B, 30B (direction perpendicular to the paper surface in Fig. 2) is referred to as the height. The same applies to the vibration-proof floor 40 and the lower floor material 50 described later. The direction parallel to the long side of each member is referred to as the length direction, the direction parallel to the short side is referred to as the width direction, and the direction parallel to the height is referred to as the height direction.

[0018] As shown in Fig. 3, the two first upper floor materials 20 located toward the center are wooden boards each having a rectangular shape in plan view with a long side 20A of 2200 mm and a short side 20B of 1100 mm, and a height of 12 mm. The two second upper floor materials 30 located on either side of the first upper floor materials 20 are wooden boards each having a rectangular shape in plan view with a long side 30A of 2200 mm and a short side 30B of 550 mm, and a height of 12 mm. In other words, the second upper floor materials 30 are the same as the first upper floor material 20, except that the short side 30B is 1 / 2 the short side 20B of the first upper floor material 20.

[0019] As shown in Figs. 3 and 4, the first upper floor material 20 has a bolt insertion hole 21 formed in the center of its length, penetrating the first upper floor material 20 in the height direction. The bolt insertion holes 21 are through holes with a diameter that allows the screw of the bolt 80 to be loosely fitted, and four bolt insertion holes 21 are formed along the width direction of the first upper floor material 20. The centers of the two bolt insertion holes 21 located on the outer side near both long sides 20A of the first upper floor material 20 are formed 125 mm inward from both long sides 20A of the first upper floor material 20 in the width direction of the first upper floor material 20. The centers of the two inner bolt insertion holes 21 are formed 300 mm inward from the adjacent outer bolt insertion holes 21 in the width direction of the first upper floor material 20. The distance between the centers of the two inner bolt insertion holes 21 is 250 mm. As shown in FIG. 4, the upper portion of each bolt insertion hole 21 is an enlarged countersunk hole 21a, and the height of the countersunk hole 21a is higher than the height of the head of the bolt 80.

[0020] The second upper floor material 30 also has a bolt insertion hole 31 formed in the center of its length direction, penetrating in the height direction. The bolt insertion hole 31 is a through hole with a diameter that allows the screw of the bolt 80 to be loosely fitted, and two bolt insertion holes 31 are formed along the width direction of the second upper floor material 30. The centers of these bolt insertion holes 31 are formed 125 mm inward in the width direction of the second upper floor material 30 from both long sides 30A of the second upper floor material 30. The distance between the centers of the two bolt insertion holes 31 is 300 mm. As shown in FIG. 4, the upper part of each bolt insertion hole 31 is a countersunk hole 31a with an enlarged diameter, similar to the bolt insertion hole 21 of the first upper floor material 20, and its height is higher than the height of the head of the bolt 80.

[0021] As shown in Figures 1 to 3, the upper floor unit 11 is configured with two first upper floor materials 20 positioned in the center and two second upper floor materials 30 positioned on either side of them, arranged side by side. These two first upper floor materials 20 and two second upper floor materials 30 are arranged side by side on the lower floor unit 12 with their adjacent and opposing long sides 20A, 30A abutting against each other. The abutting surface between these long sides 20A, 30A becomes the boundary between the first upper floor material 20 and the second upper floor material 30, or between the first upper floor materials 20. Hereinafter, these will be collectively referred to as the boundary between the first upper floor material 20 and the second upper floor material 30.

[0022] (Lower floor unit 12) As shown in Figures 1 to 3, the lower floor unit 12 has a rectangular shape in plan view that is long in the left-right direction in Figure 2. One side of the floor part of the lower floor unit 12 is 3300 mm and the other side is 2200 mm, which is the same size as the upper floor unit 11. As described later, the lower floor unit 12 is made up of three vibration-proof floors 40, and each vibration-proof floor 40 includes a lower floor material 50 and a vibration-proof material 70 installed on its underside via a base 60. Parts of the vibration-proof material 70 are positioned so as to protrude outward by 20 mm from each of the four side surfaces of the lower floor material 50, so the overall length of the lower floor unit 12 including the vibration-proof material 70 is 3340 mm x 2240 mm.

[0023] As shown in Fig. 3, the lower floor unit 12 is configured by arranging three vibration-proof floors 40 side by side. Each vibration-proof floor 40 is provided with a lower floor material 50 as a floor material. Each lower floor material 50 is a wooden board material having a height of 12 mm and a rectangular shape in plan view with a long side 50A of 2200 mm and a short side 50B of 1100 mm in width, the same size as the first upper floor material 20.

[0024] As shown in Figs. 3 and 4, the lower floor material 50 has a bolt insertion hole 51 formed in the center of its length direction, penetrating in the height direction. The bolt insertion hole 51 is a through hole with a diameter that allows the screw of the bolt 80 to be loosely fitted, and four bolt insertion holes 51 are formed along the width direction of the lower floor material 50. These bolt insertion holes 51 are formed in positions that are coaxial with the bolt insertion hole 21 of the first upper floor material 20 and the bolt insertion hole 31 of the second upper floor material 30 that constitute the upper floor unit 11 when the upper floor unit 11 is stacked on the lower floor unit 12. That is, the centers of the two bolt insertion holes 51 that are closer to the outer sides and closer to both long sides 50A are formed 125 mm inward from both long sides 50A in the width direction of the lower floor material 50. The centers of the two inner bolt insertion holes 51 are formed 300 mm inward from the adjacent outer bolt insertion holes 51 in the width direction of the lower floor material 50. The distance between the centers of the two inner bolt insertion holes 51 is 250 mm.

[0025] As shown in Figures 4 to 6, four channel steels 52 for the purpose of maintaining strength are fixed to the underside of each sub-floor material 50 with their openings facing downwards by multiple wood screws 53. Note that in Figures 5 and 6, only some of the wood screws 53 are labeled with reference numerals. Each channel steel 52 is arranged such that its length is parallel to the long side 50A of the sub-floor material 50. Each channel steel 52 is 40 mm wide, 20 mm high, and has a length of 2200 mm, the same as the long side 50A of the sub-floor material 50.

[0026] The four channel steels 52 are arranged in a position overlapping with the four bolt insertion holes 51 formed in the lower floor material 50 in the width direction of the lower floor material 50, and the bottom of the channel steel 52 is located at the end of each bolt insertion hole 51 extended axially downward. At a position facing the bolt insertion hole 51 at the bottom of each channel steel 52, a through hole 52a is formed coaxially with the bolt insertion hole 51 and into which the thread of the bolt 80 can be loosely fitted (see FIG. 4). In addition, a nut 54 is welded and fixed to the bottom of the channel steel 52 coaxially with the through hole 52a. That is, in the vibration-proof floor 40, the bolt insertion hole 51 formed in the lower floor material 50, the through hole 52a formed in the channel steel 52, and the female thread of the nut 54 fixed to the channel steel 52 are arranged coaxially. The nut 54 has the same nominal diameter as the bolt 80.

[0027] (Base 60) As shown in Figs. 4 to 6, a plurality of bases 60 are installed on the underside of the lower floor material 50. The bases 60 are made of wood and serve as an installation base for the vibration-proof materials 70. In this embodiment, as described above, the channel steel 52 is fixed to the underside of the lower floor material 50. For this reason, when installing the vibration-proof floor unit 10 on the floor surface 201 of the container 200, it is necessary to prevent interference between the floor surface 201 of the container 200 and the channel steel 52. As a means for this, it is possible to make the vibration-proof materials 70 taller by the height of the channel steel 52. However, since the vibration-proof materials 70 are expensive, the bases 60 corresponding to the height of the channel steel 52 are installed on the lower floor material 50 to prevent interference with the channel steel 52. For this purpose, the bases 60 function as spacers, and the material thereof is not particularly limited, and wood is preferable in terms of cost, weight, etc. The bases 60 are fixed at a predetermined position to the lower floor material 50 by nails or adhesive.

[0028] The bases 60 are of two types: a first base 61 which is a square in plan view with sides both of 200 mm and a height of 21 mm, and a second base 62 which is a rectangle in plan view with a long side 62A of 200 mm and a short side 62B of 100 mm and a height of 21 mm. The reason why the heights of the first base 61 and the second base 62 are both 21 mm is because the height of the channel steel 52 is 20 mm, and if the height of the base 60 exceeds the height of the channel steel 52, interference between the floor surface 201 and the channel steel 52 can be prevented.

[0029] The installation position of the first base 61 relative to the lower floor material 50 will be described. As shown in Figures 5 and 6, seven first bases 61 are installed on the underside of the subfloor material 50. First, the first base 61 is installed at a central position whose center (the intersection of diagonals in a plan view; the same applies below to the first base 61 and the second base 62) is the center of the subfloor material 50 (the intersection of diagonals in a plan view). The central position is a position sandwiched between two inner channel steels 52 on the underside of the subfloor material 50. Note that, regardless of the central position, each first base 61 is installed so that each side is parallel to or perpendicular to the long sides 50A and short sides 50B of the subfloor material 50.

[0030] Next, the first bases 61 are installed at two locations whose centers are 800 mm away from the center of the central position on both sides of the length of the lower floor material 50. The first bases 61 are also installed at four locations whose centers are 280 mm away from the center of the central position on both sides of the width of the lower floor material 50 and 400 mm away from the center of the central position on both sides of the length of the lower floor material 50. These six locations are collectively referred to as the peripheral locations. These seven first bases 61 are point-symmetrical in a plan view with the center of the lower floor material 50 as the axis.

[0031] The installation position of the second base 62 will be described. 4 to 6, the second base 62 is disposed so that the side surface of its long side 62A is on the same plane, i.e., flush, in a plan view with the side surface of the long side 50A or the short side 50B of the lower floor material 50. Note that in Figs. 5 and 6, the reference symbols for the long side 62A and the short side 62B are attached to only a portion of the second base 62.

[0032] 5 and 6, the second bases 62 are installed at two positions along the long sides 50A of the sub-floor material 50, the centers of which are the longitudinal center of each sub-floor material 50 and are 50 mm inward in the width direction of the sub-floor material 50 from the long sides 50A of each sub-floor material 50. The second bases 62 are installed at four positions, the centers of which are 850 mm each in the longitudinal direction of the sub-floor material 50 from the above-mentioned two positions. These six positions along the two long sides 50A of the sub-floor material 50 are collectively referred to as positions along the long sides.

[0033] The second bases 62 are installed at four positions along the short sides 50B of the lower floor material 50, the centers of which are shifted 300 mm outward in the width direction from the center of the width direction of each lower floor material 50 and 50 mm inward in the length direction from the short sides 50B of each lower floor material 50. These four positions along the two short sides 50B of the lower floor material 50 are collectively referred to as positions along the short sides. Note that the long sides 62A of the second bases 62 installed at the positions along the short sides are aligned with the short sides 50B of the lower floor material 50, and therefore have a 90 degree different orientation in plan view from the long sides 62A of the second bases 62 at the positions along the long sides. These ten second bases 62 are point-symmetric in plan view with the center of the lower floor material 50 as the axis.

[0034] (Vibration isolation material 70) As shown in each drawing, vibration-proof material 70 is fixed by adhesive to the lower surfaces of the first base 61 and the second base 62. This vibration-proof material 70 comes into contact with the floor surface 201 of the container 200 to reduce vibrations from the floor surface 201. The vibration-proof material 70 will be described in detail below.

[0035] As shown in Figs. 5 and 6, a first vibration-isolating material 71 having a square shape in plan view of 200 mm x 200 mm, the same as one side of the first base 61, and a height of 25 mm is installed on the first base 61 at the central position. The first vibration-isolating material 71 is installed at a central position where its center (the intersection of diagonals in plan view, the same applies to the vibration-isolating material 70 below) is the center of the lower floor material 50. As a result, each side of the first vibration-isolating material 71 and each side of the first base 61 are flush with each other. Note that the first vibration-isolating material 71 has a contact surface that contacts the floor surface 201 of the container 200 and a fixed surface that is fixed to the first base 61, both of which are flat. This is also true for the second vibration-isolating material 72 and the third vibration-isolating material 73 described later. In addition, on the six peripheral positions of the first base 61, second vibration-damping materials 72 each having a square shape in plan view with each side measuring 150 mm x 150 mm and a height of 25 mm are installed so that their center coincides with the center of the first base 61.

[0036] For the second base 62 along the long side and the short side, a third vibration-damping material 73 is used, the side of which is half the long side 62A of the second base 62, i.e., the same length as the short side 62B, specifically, the side of which is a square in plan view measuring 100 mm x 100 mm, and the height of 25 mm.

[0037] The third vibration-proof materials 73 provided on the second bases 62 along these long sides and short sides are positioned so that their centers are shifted from the center of the second bases 62 in the lengthwise and widthwise directions of the second bases 62.

[0038] Among the positions along the long sides, the third vibration-proof material 73 provided on the second base 62 along the long side 50A on the upper side in FIG. 5 and the lower side in FIG. 6 of the lower floor material 50 will be described. The third vibration-proof material 73 is disposed at a position where its center is shifted 50 mm to the left in the drawing in the length direction of the second base 62 and 20 mm outward in the width direction of the second base 62 with respect to the center of each second base 62. 50 mm is half the length of one side of the third vibration-proof material 73. As a result, one side of the third vibration-proof material 73 is flush with the side of the short side 62B of the second base 62, and one side perpendicular to this is positioned protruding 20 mm outward from the side of the long side 50A of the lower floor material 50 and the long side 62A of the second base 62 perpendicular to that side.

[0039] The third vibration-isolating material 73 provided on the second base 62 along the long side 50A of the lower floor material 50 on the lower side in Fig. 5 and the upper side in Fig. 6 is disposed in a position where its center is shifted 50 mm to the right in the length direction of the second base 62 and 20 mm outward in the width direction of the second base 62 with respect to the center of each second base 62. As a result, one side of the third vibration-isolating material 73 is flush with the side of the short side 62B of the second base 62, and one side perpendicular to this is positioned protruding 20 mm outward from the side of the long side 50A of the lower floor material 50 and the long side 62A of the second base 62, perpendicular to that side.

[0040] In this way, the third vibration-proofing material 73 is disposed at a position along the two long sides, the center of which is shifted 20 mm outward in the width direction of the second base 62. Therefore, a part of the third vibration-proofing material 73 is positioned protruding outward in the width direction of the lower floor material 50 from the side surface of the long side 50A of the lower floor material 50 and the long side 62A of the second base 62. In addition, between one long side 50A and the other long side 50A of the lower floor material 50, the third vibration-proofing material 73 is disposed at a position shifted by half the length of one side of the third vibration-proofing material 73 in different directions from the center of the second base 62 along its length direction. Therefore, each of the third vibration-proofing materials 73 provided on the two long sides 50A of the lower floor material 50 is asymmetrical with respect to a virtual line passing through the width direction center of the lower floor material 50, and is disposed at a position where it does not overlap in the length direction of A of the lower floor material 50.

[0041] The third vibration-proofing material 73 provided on each second base 62 along the short side is provided at a position where its center is shifted 50 mm from the center of the second base 62 in the direction away from each other in the length direction of the second base 62 and shifted 20 mm outward in the width direction of the second base 62. As a result, one side of the third vibration-proofing material 73 is flush with the side of the short side 62B located on both outer sides of each second base 62, and the side perpendicular to it is positioned protruding 20 mm outward from the side of the short side 50B of the lower floor material 50 and the long side 62A of the second base 62 perpendicular to the side. As a result, a part of the third vibration-proofing material 73 is positioned protruding outward in the length direction of the lower floor material 50 from the short side 50B of the lower floor material 50 and the long side 62A of the second base 62. The outward protrusion amount of the third vibration-proofing material 73 at the positions along the long side and the short side is preferably in the range of 5 to 100 mm.

[0042] The positions of the first vibration-isolating material 71, the second vibration-isolating material 72, and the third vibration-isolating material 73 installed on the lower floor material 50 are point-symmetric in a plan view with the center of the lower floor material 50 as the axis. Examples of vibration-isolating materials 70 that can be used as the first vibration-isolating material 71, the second vibration-isolating material 72, and the third vibration-isolating material 73 include vibration-isolating materials 70 made of polyurethane, etc.

[0043] 1 to 3, the lower floor unit 12 is arranged side by side with the long sides 50A of the lower floor materials 50 of the three vibration-isolating floors 40 abutting against each other. The abutting surface between the long sides 50A forms the boundary between the vibration-isolating floors 40 and the lower floor materials 50.

[0044] As shown in Fig. 2, at this boundary, the third vibration-proof material 73, which is positioned protruding from both opposing long sides 50A of the lower floor material 50, is positioned so that its protruding portions fit under the second base 62 along the opposing long sides 50A. Also, as shown in Fig. 2, the boundary (50A, 50A shown by dashed lines) of the vibration-proof floor 40 constituting the lower floor unit 12 and the boundary (20A, 30A shown by solid lines) of the first upper floor material 20 and second upper floor material 30 constituting the upper floor unit 11 are positioned offset from each other and do not overlap in a plan view.

[0045] 7 and 8, a manufacturing method for the vibration-isolating floor unit 10 using the first upper floor material 20, the second upper floor material 30, and the vibration-isolating floor 40 will be described. The container 200 has a door on one longitudinal side of the side wall 202, which is the lower side in the figure, that opens and closes on both sides; this door is not shown in the figure.

[0046] As shown in FIG. 7(a), the installer installs the first vibration-isolating floor 40 at a position close to the short-side wall 202 on the floor surface 201 of the container 200. In this state, although not shown in FIG. 7, the grounding surfaces of the first vibration-isolating material 71, the second vibration-isolating material 72, and the third vibration-isolating material 73 are grounded on the floor surface 201 of the container 200. Then, as shown in FIG. 7(b), the side surfaces of the third vibration-isolating material 73 protruding from the long side 50A and the short side 50B of the lower floor material 50 are abutted against the two side walls 202 of the container 200. The protruding side surfaces of the third vibration-isolating material 73 at the positions along the long side and the short side are abutted against the side wall 202 of the container 200. On the other hand, the side surfaces of the long side 50A and the short side 50B of the lower floor material 50 do not abut against the side wall 202 of the container 200, and there is a gap of 20 mm therebetween, which corresponds to the protruding amount of the third vibration-isolating material 73.

[0047] 7(c), a second vibration-isolating floor 40 is installed on the floor surface 201 of the container 200 adjacent to the previously installed vibration-isolating floor 40, and the second vibration-isolating floor 40 is moved so that its long side 50A approaches the long side 50A of the previously installed vibration-isolating floor 40 until the opposing long sides 50A come into contact with each other. A portion of the third vibration-isolating material 73 protrudes outward from the opposing long sides 50A of both lower floor materials 50, but the opposing third vibration-isolating materials 73 are positioned so as not to overlap in the longitudinal direction of the lower floor materials 50.

[0048] Therefore, as shown in FIG. 7(d), even if the positions of the short sides 50B are aligned and the long sides 50A of both lower floor materials 50 are brought closer to each other, the opposing third vibration-proof materials 73 do not interfere with each other. In addition, the protruding third vibration-proof materials 73 are inserted under the second bases 62 at the long sides 50A of the opposing lower floor materials 50, so that the long sides 50A of the two lower floor materials 50 can abut each other. Then, when the third vibration-proof floor 40 is installed adjacent to the second vibration-proof floor 40 in the same manner, the three vibration-proof floors 40 are arranged side by side as shown in FIG. 7(e), thereby completing the lower floor unit 12 in which the opposing long sides 50A of the adjacent vibration-proof floors 40 abut each other. Note that the lower floor unit 12 is simply arranged side by side with the long sides 50A abutting each other, and is not fixed so as to be immovable relative to each other.

[0049] Next, the upper floor unit 11 is assembled onto the lower floor unit 12. As shown in Fig. 8(a), the second upper floor material 30 is installed on the vibration-isolating floor 40 located at the end of the lower floor unit 12 in the juxtaposition direction so that the long side 30A of the second upper floor material 30 and the long side 50A of the lower floor material 50 overlap in a plan view. Next, the first upper floor material 20 is installed next to the second upper floor material 30 installed on the lower floor unit 12, and the long sides 30A, 20A are abutted against each other. Next, the first upper floor material 20 and the second upper floor material 30 are installed in that order, and the long sides 20A, 30A of each are abutted against each other.

[0050] As a result, as shown in FIG. 8(b), the vibration-proof floor 40 of the lower floor unit 12 and the first and second upper floor materials 20 and 30 of the upper floor unit 11 are stacked in a state of overlapping in a plan view. A second upper floor material 30 having a width of 1 / 2 that of the first upper floor material 20 is used on both outer sides of the upper floor unit 11 in the longitudinal direction. Therefore, the boundary of the vibration-proof floor 40 constituting the lower floor unit 12 and the boundary of the first and second upper floor materials 20 and 30 constituting the upper floor unit 11 do not overlap in a plan view, and the boundaries are shifted in the longitudinal direction of the upper floor unit 11 and the lower floor unit 12. Specifically, the first upper floor material 20 is positioned across two adjacent vibration-proof floors 40, and the first upper floor material 20 or the second upper floor material 30 is positioned across one vibration-proof floor 40. In addition, the upper floor unit 11 is simply arranged such that the first upper floor material 20 and the second upper floor material 30 are in contact with each other at their long sides 20A, 30A, and are not fixed so as to prevent relative movement.

[0051] As shown in FIG. 4, in the stacked state, the bolt insertion holes 21, 31 of the first upper floor material 20 and the second upper floor material 30 and the bolt insertion holes 51 of the vibration-proof floor 40 are coaxially positioned. When the bolt 80 is inserted into the bolt insertion holes 21, 31 of the first upper floor material 20 and the second upper floor material 30, the thread of the bolt 80 passes through the bolt insertion holes 51 of the vibration-proof floor 40 and further passes through the through hole 52a formed in the channel steel 52 to reach the nut 54. When each bolt 80 is screwed into the nut 54, the bolt 80 is seated on the bottom surface of the countersunk holes 21a, 31a, and the first upper floor material 20, the second upper floor material 30 and the vibration-proof floor 40 are fastened by the bolt 80 and the nut 54. As a result, the movement of the first upper floor material 20, the second upper floor material 30 and the vibration-proof floor 40 in the axial direction of the bolt 80 and in the direction perpendicular thereto is restricted. In addition, the boundary between the first upper floor material 20 and the second upper floor material 30 and the boundary of the vibration-proof floor 40 are located at positions that do not overlap in a plan view. Therefore, fastening with the bolt 80 and the nut 54 restricts the relative movement between the first upper floor material 20, the second upper floor material 30 and the vibration-proof floor 40, and also restricts the relative movement between adjacent first upper floor materials 20 and second upper floor materials 30, and between adjacent vibration-proof floors 40. The head of the bolt 80 is accommodated in the countersunk holes 21a, 31a of the first upper floor material 20 and the second upper floor material 30, and the bolt 80 is not exposed from the first upper floor material 20 and the second upper floor material 30.

[0052] Then, by placing precision equipment, etc. on the vibration-proof floor unit 10 manufactured inside the container 200, transportation can be carried out while the vibration-proof material 70 provides vibration protection from the floor 201 of the container 200 and from the side walls 202 of the container 200.

[0053] According to the vibration isolation floor unit 10 of the above embodiment, the following effects can be obtained. (1) In the above embodiment, the vibration-isolating floor 40 has a lower floor material 50 that is rectangular in plan view, and below that, a base 60 and a vibration-isolating material 70 are provided via the base 60. The vibration-isolating material 70 absorbs vibrations from the floor surface 201 of the container 200, and therefore can reduce vibrations transmitted to precision equipment and the like placed on the vibration-isolating floor 40.

[0054] (2) The third vibration-proof material 73 is positioned to protrude outward from the side surfaces of the long side 50A and the short side 50B of the lower floor material 50 in a direction perpendicular to the side surfaces. Therefore, even if the vibration-proof floor 40 is disposed in contact with the side wall 202 of the container 200, the third vibration-proof material 73 abuts against the side wall 202 of the container 200, but the lower floor material 50 does not abut against it. As a result, the third vibration-proof material 73 absorbs vibrations from the side wall 202 of the container 200, and the vibrations transmitted to the lower floor material 50 can be reduced.

[0055] (3) At the position along the long side, the center of the third vibration-proof material 73 is provided at a position shifted by half a side of the third vibration-proof material 73, i.e., 50 mm, in the length direction of the second base 62 from the center of the second base 62. Furthermore, at the positions along the two long sides, the third vibration-proof materials 73 are arranged shifted in different directions from each other. Therefore, the opposing third vibration-proof materials 73 are not positioned to overlap in the length direction of the lower floor material 50. Even when the long sides 50A of two vibration-proof floors 40 are opposed to each other, the opposing third vibration-proof materials 73 of adjacent vibration-proof floors 40 can abut against each other without interfering with each other.

[0056] (4) Furthermore, the portions of the opposing third vibration-proof materials 73 of adjacent vibration-proof floors 40 that protrude from the lower floor material 50 go under the second base 62 of the opposing vibration-proof floor 40. The opposing third vibration-proof materials 73 are located under the opposing second bases 62 so as to mesh with each other, and vibrations from these portions can be reduced.

[0057] (5) The first vibration-isolating material 71, the second vibration-isolating material 72, and the third vibration-isolating material 73 of the vibration-isolating floor 40 are provided point-symmetrically with respect to the center of the lower floor material 50. Therefore, even if the vibration-isolating floor 40 is rotated 180 degrees, the third vibration-isolating material 73 remains in the same position, and the directionality during use is not easily restricted.

[0058] (6) The boundaries between the three vibration-isolating floors 40 that make up the lower floor unit 12 and the boundaries between the first upper floor material 20 and the second upper floor material 30 that make up the upper floor unit 11 are located in positions that do not overlap in the width direction. Therefore, even if a load is concentrated at the boundary between the first upper floor material 20 and the second upper floor material 30, the load will not be concentrated at the boundary of the vibration-isolating floors 40.

[0059] (7) The first upper floor material 20, the second upper floor material 30 and the vibration-proof floor 40 are fastened together with bolts 80 and nuts 54. This ensures that the upper floor unit 11 and the lower floor unit 12 are fixed together. Also, in the vibration-proof floor 40, the nuts 54 are fixed to the channel steel 52 arranged on the underside of the lower floor material 50. Therefore, once the first upper floor material 20, the second upper floor material 30 and the vibration-proof floor 40 are positioned, the bolts 80 can be inserted from above and fixed to the nuts 54, making the fastening work easy.

[0060] The above embodiment may be modified as follows. In the above embodiment, the vibration-isolating floor unit 10 is formed by combining two first and two second upper floor materials 20 and 30 with three vibration-isolating floors 40, but other combinations are also possible. For example, one first upper floor material 20 may be placed on top of one vibration-isolating floor 40 and the two may be fastened together with a bolt 80. This results in a vibration-isolating floor unit 10 measuring 2200 mm x 1100 mm. In cases such as when the size of the object to be loaded is small, it is not necessary to install the vibration-isolating floor unit 10 over the entire floor surface 201 of the container 200, and the vibration-isolating floor unit 10 may be of the required size.

[0061] Only one vibration-isolating floor 40 may be used. When the size of the load is small, the first upper floor material 20 and the second upper floor material 30 may be omitted and only one vibration-isolating floor 40 may be used.

[0062] Although the first upper floor material 20, the second upper floor material 30 and the lower floor material 50 are made of wooden boards, this is not limited to this. They may be made of resin or metal, or may be made partially of these materials. In cases where a sufficient clearance can be secured between the channel steel 52 and the floor surface 201, taking into consideration the deflection of the vibration-proof material 70, due to the relationship between the height of the channel steel 52 and the thickness of the vibration-proof material 70, the vibration-proof material 70 may be fixed directly to the lower floor material 50 without using the base 60. In this case, the position of the vibration-proof material 70 relative to the lower floor material 50 in a plan view does not need to be changed from the above embodiment.

[0063] Although the contact surface of the vibration-proof material 70 is flat, this is not limited to the above. For example, as shown in the side view of Fig. 9, the contact surface of the vibration-proof material 70 may have a corrugated shape with uneven cross-section, such as a large number of spherical cones lined up. When such a shape is adopted, the convex parts do not sink as much for a light load, reducing the contact area of ​​the vibration-proof material 70 and lowering the spring constant, whereas the convex parts do sink as much for a heavy load, increasing the contact area of ​​the vibration-proof material 70 and increasing the spring constant.

[0064] The contact surface of the vibration-proof material 70 may have a so-called ridge shape in which the corrugated cross-sectional unevenness continues in a direction perpendicular to the cross-sectional unevenness. The arrangement and size of the vibration-proof material 70 may be changed as appropriate.

[0065] The vibration-proof material 70 protruding from the long sides 50A and short sides 50B of the lower floor material 50 may protrude diagonally outward from the four corners of the lower floor material 50. In this way, one vibration-proof material 70 can protrude outward from each of the long sides 50A and short sides 50B of the lower floor material 50.

[0066] The number, size, and position of the vibration-proof materials 70 protruding from the lower floor material 50 may be changed, and it is sufficient that there is at least one vibration-proof material 70 protruding from each of the long side 50A and the short side 50B of the lower floor material 50. As shown in FIG. 5, the centers of the third vibration-proof materials 73 are located at positions along each short side of the lower floor material 50 at positions shifted 50 mm from the center of the second base 62 in the direction away from each other in the length direction of the second base 62, but this is not limited to the above. As shown in FIG. 10, the centers of the third vibration-proof materials 73 may be located at positions shifted in the same direction in the length direction of the second base 62 at positions along each short side of the lower floor material 50 at positions shifted in different directions from the center of the second base 62 in the same direction in the length direction of the second base 62. In this case, the positions of the third vibration-proof materials 73 are point-symmetrical in a plan view with the center of the lower floor material 50 as an axis, that is, in different directions at positions along the left and right short sides in FIG. 10, specifically, downward on the right side and upward on the left side. In this way, the third vibration-proof materials 73 do not interfere with each other even when the short sides 50B of the lower floor material 50 are abutted against each other. In this case, the abutting surfaces of the short sides 50B also become the boundaries of the vibration-proof floor 40.

[0067] It is not necessary for the vibration-isolating material 70 to protrude from all of the long sides 50A and short sides 50B of the lower floor material 50. It is sufficient to install it only in places that may come into contact with the side wall 202 when installing the vibration-isolating floor 40. For example, the vibration-isolating material 70 may be provided so as to protrude only from the long sides 50A or only from the short sides 50B of the lower floor material 50.

[0068] The size, length of the long and short sides, etc. of the first upper floor material 20, the second upper floor material 30, the lower floor material 50 or the vibration-proof floor 40 may be changed. In addition to the first upper bedding material 20 shown in Fig. 11(a) and the second upper bedding material 30 shown in Fig. 11(b), a third upper bedding material 22 shown in Fig. 11(c) and a fourth upper bedding material 23 shown in Fig. 11(d) may be used. Specifically, the third upper bedding material 22 has a shape obtained by halving the first upper bedding material 20 in the length direction, and the fourth upper bedding material 23 has a shape obtained by halving the second upper bedding material 30 in the length direction. For the sake of convenience in explaining the sizes, the third upper bedding material 22 is shown in a state in which two sheets are combined, and the fourth upper bedding material 23 is shown in a state in which four sheets are combined.

[0069] As a result, for example, when four vibration-isolating floors 40 of the modified example shown in Fig. 10 are combined in a cross shape, a boundary is formed where the sides meet in a cross shape, as shown by the dashed lines in Fig. 11(e). Even in such a case, by combining the first upper floor material 20 to the fourth upper floor material 23 on top of the vibration-isolating floor 40 as shown in the figure, it is possible to position the boundaries (dashed lines) of the four vibration-isolating floors 40 in the vibration-isolating floor unit 10 so that they do not overlap with the boundaries (solid lines) of the upper floor materials in a plan view.

[0070] -May be used for purposes other than containers. Second Embodiment Next, a second embodiment of the present invention, which is a vibration-isolating floor for a trolley (hereinafter referred to as "vibration-isolating floor") 110, will be described with reference to Figs. 12 and 13. Note that detailed descriptions of the same parts of the second embodiment as those of the first embodiment will be omitted. For the sake of convenience, specific numerical values ​​will be shown below, but these numerical values ​​are merely examples.

[0071] As shown in Fig. 12, a perspective view of a dolly 210 on which a vibration-isolating floor 110 is installed, the dolly 210 has swivelable wheels installed at its four lower corners. Furthermore, frames are formed on three side surfaces of a floor surface 211 of the dolly 210, and only one surface is open. The inner dimensions of the floor surface 211 of the dolly 210 are such that the length of the side along the opening surface and the opposite side thereto are 1020 mm, and the lengths of the two sides perpendicular to these are each 1060 mm. Furthermore, side walls 212 with a height of 50 mm are formed on the three sides of the floor surface 211 of the dolly 210 excluding the sides of the opening surface.

[0072] Fig. 13(a) shows a rear view of the vibration-isolating floor 110, and Fig. 13(b) shows a plan view of the same. The vibration-isolating floor 110 shown in the figure is placed on the floor surface 211 of the cart 210, and is formed in a size that allows it to be placed on the floor surface 211 with ample space to spare. As shown in Fig. 13(a), the vibration-isolating floor 110 is made up of a floor material 120 and a number of vibration-isolating materials 130 fixed to the underside of the floor material 120. Unlike the first embodiment, the vibration-isolating materials 130 are fixed directly to the underside of the floor material 120 with an adhesive.

[0073] The floor material 120 is a wooden board material with a rectangular shape in plan view, with long sides 120A extending in the vertical length direction in the figure being 1040 mm, and short sides 120B extending in the horizontal width direction in the figure being 1000 mm, and a height of 20 mm. As described later, the vibration-isolating floor 110 is disposed so as to protrude by 10 mm from each of the side surfaces of the long sides 120A and short sides 120B of the floor material 120, so that the total length of the vibration-isolating floor 110 is 1060 mm in the long side direction and 1020 mm in the short side direction.

[0074] The vibration-proof materials 130 are of three types: an eleventh vibration-proof material 131 which is a square in plan view with each side measuring 167 mm, a twelfth vibration-proof material 132 which is a square in plan view with each side measuring 100 mm, and a thirteenth vibration-proof material 133 which is a square in plan view with each side measuring 60 mm. All of them have a height of 25 mm. The eleventh vibration-proof material 131, twelfth vibration-proof material 132, and thirteenth vibration-proof material 133 all have flat surfaces on their contact surfaces and fixed surfaces which are fixed to the floor material 120.

[0075] The eleventh vibration-proof material 131 is placed in a central position where its center is the center of the floor material 120. The eleventh vibration-proof material 131 is placed so that each side is parallel to or perpendicular to the long side 120A and short side 120B of the floor material 120. The same is true for the twelfth vibration-proof material 132 and the thirteenth vibration-proof material 133. The twelfth vibration-proof material 132 is placed in a position where its center is on the diagonal line of the floor material 120, and is the midpoint between the four corners of each floor material 120 and the center of the floor material 120. There are four such positions, and they are called peripheral positions.

[0076] The twelfth vibration-proof materials 132 are installed at two locations, each 460 mm away from the center of the floor material 120 on both sides in the width direction, and at two locations, each 480 mm away from the center of the floor material 120 on both sides in the length direction. These locations are referred to as the central location along the long side and the central location along the short side, respectively. One side of the twelfth vibration-proof materials 132 installed at the central location along the long side and the central location along the short side protrudes 10 mm outward from the side of the long side 120A or the short side 120B of the floor material 120, perpendicular to that side.

[0077] Furthermore, the center of the thirteenth vibration-proof material 133 is located 150 mm in the length direction or width direction from each of the four corners of each floor material 120, and 20 mm inward in the width direction from each long side 120A of the floor material 120, or 20 mm inward in the length direction from each short side 120B. There are eight such positions, two on each long side 120A and each short side 120B, and these positions are called corner positions. One side of the thirteenth vibration-proof material 133 installed at these corner positions protrudes 10 mm outward from the side of the long side 120A or short side 120B of the floor material 120, perpendicular to that side.

[0078] The positions of the eleventh vibration-proof material 131, the twelfth vibration-proof material 132, and the thirteenth vibration-proof material 133 installed on the floor material 120 are point-symmetric in a plan view with the center of the floor material 120 as the axis, and are line-symmetric with respect to an imaginary line passing through the center of the width direction of the floor material 120 and an imaginary line passing through the center of the length direction of the floor material 120. As with the first embodiment, commercially available products can be used as these vibration-proof materials 130.

[0079] The vibration-isolating floor 110 of the second embodiment may be installed so that the opening in the floor surface 211 of the dolly 210 and the short side 120B of the vibration-isolating floor 110 are parallel to each other. In this way, the vibration-isolating material 130 is in contact with the floor surface 211 of the dolly 210, and the vibration-isolating material 130 is positioned protruding outward from each long side 120A and each short side 120B of the vibration-isolating floor 110, so that the side surface of this protruding vibration-isolating material 130 abuts against the side wall 212 of the dolly 210. As a result, the vibration-isolating floor 110 can reduce vibrations from not only the floor surface 211 of the dolly 210 but also the side wall 212 by the vibration-isolating material 130.

[0080] Therefore, the second embodiment can achieve the same effects as the first embodiment. This embodiment may be modified in the same manner as the modifications explained for the vibration-isolating floor 40 of the first embodiment, and may also be modified as follows.

[0081] The flooring material 120 is made square in plan view, which eliminates restrictions on the direction of use. -Can be used for purposes other than as a trolley. [Explanation of symbols]

[0082] 10...Anti-vibration floor unit 11...Upper floor unit 12...Lower floor unit 20…First upper floor material (upper floor material) 20A…Long side of the first upper floor material (boundary) 30…Second upper floor material (upper floor material) 30A…Long side of second upper floor material (boundary) 40…Anti-vibration floor 50…Subfloor material (flooring material) 50A…Long side of subfloor material (boundary) 50B…Short side of subfloor 54...Nut (fastening member) 60…Foundation 70...Vibration isolation material 71...First vibration-proof material (vibration-proof material) 72...Second vibration-proof material (vibration-proof material) 73...Third vibration-proof material (vibration-proof material) 80...Bolt (fastening member) 110...Anti-vibration floor for trolleys (Anti-vibration floor) 120…Flooring 120A…Long side of flooring 120B…Short side of flooring 130...Vibration isolation material 131...11th vibration-proof material (vibration-proof material) 132...12th vibration-proof material (vibration-proof material) 133...13th vibration-proof material (vibration-proof material)

Claims

1. A vibration-proof floor having a floor material having a rectangular shape in a plan view and a vibration-proof material provided under the floor material, A vibration-isolating floor characterized in that a portion of the vibration-isolating material protrudes outward from at least one side surface of the floor material.

2. The floor material is rectangular in plan view, and the vibration-proof material is provided so that a portion of the vibration-proof material protrudes outward from each long side of the floor material. The vibration-isolating floor according to claim 1 , wherein the vibration-isolating materials are positioned so as not to overlap in the longitudinal direction of the floor material.

3. 3. The vibration-isolating floor according to claim 2, wherein the vibration-isolating material is provided so that a portion of the vibration-isolating material protrudes outward from each short side surface of the floor material.

4. The vibration-isolating floor according to claim 2 or 3, wherein the vibration-isolating material is point-symmetric with respect to an intersection point of diagonals of the floor material in a plan view.

5. The vibration-isolating floor according to claim 2 or 3, wherein the vibration-isolating material is polyurethane.

6. 6. The vibration-isolating floor according to claim 5, wherein the contact surface of the vibration-isolating material has a corrugated cross-section.

7. A lower floor unit in which a plurality of vibration-isolating floors according to claim 2 or 3 are arranged side by side with the long sides facing each other; and an upper floor unit in which a plurality of upper floor materials each having a rectangular shape in plan view are arranged side by side on the lower floor unit, A vibration-isolating floor unit in which the boundaries of the multiple vibration-isolating floors and the boundaries of the multiple upper floor materials are positioned so as not to overlap when viewed in a plan view.

8. The vibration-isolating floor unit according to claim 7 , wherein the vibration-isolating floor and the upper floor material are fastened together by fastening members.

9. A step of arranging a plurality of vibration-isolating floors according to claim 2 or 3 side by side with the long sides facing each other to form a lower floor unit; A manufacturing method of a vibration-isolation floor unit, comprising a step of arranging a plurality of upper floor materials each having a rectangular shape in a plan view on the lower floor unit to form an upper floor unit, A manufacturing method for a vibration-isolation floor unit in which, when the upper floor material is juxtaposed on top of the lower floor unit, the boundaries of the multiple vibration-isolation floors and the boundaries of the multiple upper floor materials are positioned so that they do not overlap in a planar view.

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