Sheet fixing device

Abstract

To provide a sheet fixing device capable of fixing a sheet to a structure without increasing costs.SOLUTION: A sheet fixing device comprises a longitudinal recessed groove formed in a structure, and a longitudinal pushed-in member that is pushed into the recessed groove. With a sheet inserted into the recessed groove and the pushed-in member pushed into the recessed groove, the sheet is clamped and fixed between a wall surface of the recessed groove and the pushed-in member. Here, since the pushed-in member for fixing the sheet is configured separately from the sheet, the cost of the sheet fixing device can be reduced.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a sheet fixing device for fixing a sheet stretched over the surface of a truss-like structure. [Background technology]

[0002] Generally, the walls of temporary booths at exhibition halls and the like are set up by fixing a sheet to a structure, for example a truss-like structure, with the sheet stretched over the surface of the structure. As an example of a conventional sheet fixing device for fixing a sheet to a structure, Patent Document 1 discloses a structure equipped with a locking plate for locking the sheet to the structure. In detail, a locking groove (recessed groove) is formed along the edge of the structure on the surface side of the structure (the surface side on which the sheet is stretched). The locking plate has a rectangular cross-sectional shape that can be engaged with the locking groove of the structure. The locking plate is made of an elastic material, and has a thickness that is the same as or slightly larger than the groove width of the locking groove.

[0003] The locking plate is attached to the periphery of the back side of the sheet. Methods for attaching the locking plate to the sheet include, for example, sewing the locking plate to the sheet, fixing it with staples, or gluing it. In addition, a plurality of protrusions are formed at intervals in the depth direction of the locking groove on the surface of the locking plate opposite to the surface attached to the sheet. In the fixing device of Patent Document 1, the locking plate attached to the back side of the sheet is compressed and pushed into the locking groove, making it possible to hold the sheet in a taut state on the front side of the structure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5967740 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in Patent Document 1, it is necessary to attach a locking plate to the peripheral portion of the back side of the seat, which increases the manufacturing cost of the seat fixing device. In addition, when the holding force of the locking plate in the locking groove decreases, the seat needs to be replaced even if it is still usable, which also increases the cost.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a seat fixing device that can fix a seat to a structure without increasing costs. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a sheet fixing device for fixing a sheet stretched over the surface of a truss-like structure, comprising a longitudinal groove formed in the structure, and a longitudinal pushing member that is pushed into the groove, and when the sheet is inserted into the groove, the pushing member is pushed into the groove, whereby the sheet is clamped and fixed between the groove and the pushing member.

[0008] In this configuration, when fixing the sheet to the structure, it is only necessary to push the push-in member into the groove with the sheet in the groove, so the sheet and the push-in member are configured separately, and there is no need to attach the push-in member to the sheet. Even if the push-in member deteriorates and the holding force of the sheet in the groove decreases, only the push-in member needs to be replaced, and the sheet can be used continuously. As a result, it is possible to reduce the cost of the sheet fixing device.

[0009] In the above configuration, preferably, the structure is composed of one or more frame bodies configured to surround it on all four sides, and the grooves are formed on the top surface of the frame body and on the lower end side of the surface of the frame body along the width direction of the frame body.

[0010] According to this configuration, the sheet is fixed along the width direction of the frame body on the top surface of the frame body and the lower end side of the surface of the frame body. Therefore, by fixing the sheet on the top surface of the frame body, the mounting structure on the upper part of the sheet becomes inconspicuous from the surface side. Also, by fixing the sheet on the lower end side of the surface of the frame body, the mounting structure of the sheet located on the lower end side of the surface of the frame body becomes inconspicuous.

[0011] In the above configuration, the structure is preferably composed of one or more frame bodies configured to surround it on all four sides, and the groove is formed on the side of the frame body along the vertical direction of the frame body.

[0012] According to this configuration, the sheet is fixed firmly to the side surface of the frame body in addition to the top surface and the lower end side of the front surface. Also, since the sheet is fixed to the side surface of the frame body along the up-down direction of the frame body, the sheet mounting structure becomes inconspicuous from the front surface side of the frame body.

[0013] In the above configuration, preferably, the frame body includes a pair of beam members which form the upper and lower parts of the frame body and extend along the width direction of the frame body, a pair of column members which form both sides of the width direction of the frame body and extend along the up-down direction of the frame body, and four dice materials which form the corners of the frame body and are interposed between the ends of the beam members and the ends of the column members, and the beam members and the dice materials are detachably connected, and the column members and the dice materials are detachably connected.

[0014] According to this configuration, the beam members and the cubic members are detachably connected, and the column members and the cubic members are detachably connected, so that the size of the frame can be changed appropriately by preparing a plurality of beam members and column members of different lengths. In this case, the same sheet can be reused even if the size of the frame is changed, as long as the surface of the frame can be covered with the sheet.

[0015] In the above configuration, preferably, the beam member and the column member are formed into a square when viewed in the longitudinal direction, and the beam member and the column member each have a pair of the grooves on four side surfaces corresponding to each side of the square, extending in the longitudinal direction along both edges of each side surface and spaced the same distance from each edge.

[0016] According to this configuration, even if the top and surface of the frame are formed from any of the four side surfaces of the beam member, a groove is formed on the lower end of the top and surface of the frame along the width direction of the frame. Similarly, even if the side surface of the frame is formed from any of the four side surfaces of the column member, a groove is formed on both side surfaces of the frame along the up-down direction.

[0017] In the above configuration, preferably, the die material is formed into a cube, and the die material is constructed by connecting together the ends of element members extending along each side of the cube, and the groove is formed at least in two of the element members connected to each other to form an L-shape on a single plane, and in a pair of element members extending perpendicularly to the single plane from both ends of the two element members forming the L-shape, and the element members in which the groove is formed each have a groove on two side surfaces that intersect on either side of one side of the cube, extending longitudinally along the intersection line of the two side surfaces and spaced the same distance from the intersection line.

[0018] With this configuration, by adjusting the positions of the faces of the dice material placed at the four corners of the frame body, it is possible to realize, at the corners of the frame body, a groove formed on the top surface of the frame body, a groove formed on the lower end side of the surface of the frame body, and a groove formed on the side of the frame body.

[0019] In the above configuration, preferably, the pushing member has a longitudinally formed pushing section which is pushed into the groove, and the pushing section is formed with a pair of protrusions which protrude toward the opposing wall surfaces of the groove, and the dimension between the vertices of the pair of protrusions is set to be greater than or equal to the groove width of the groove.

[0020] According to this configuration, when the pushing section is pushed into the groove with the sheet inserted in the groove, the sheet is clamped between the protrusion of the pushing section and the groove, thereby fixing the sheet in the groove.

[0021] In the above configuration, the pushing member is preferably formed with a flange portion that comes into contact with the frame when the pushing portion is pushed into the recessed groove.

[0022] According to this configuration, the amount of pushing of the pushing portion into the recessed groove can always be kept at an appropriate value. Effect of the Invention

[0023] As described above, according to the present invention, the cost of a sheet fastening device that fastens a sheet to the surface of a structure can be reduced. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is an overall view of a seat wall according to an embodiment of the present invention. [Diagram 2] 2 is a diagram illustrating the structure of the beam member in FIG. 1. [Diagram 3] FIG. 3 is a cross-sectional view of the frame member of FIG. 2. [Figure 4] FIG. 1 is a diagram illustrating the structure of a die material. [Diagram 5] 5A and 5B are views of the die material of FIG. 4 from various directions. [Figure 6] FIG. [Figure 7] FIG. 11 is a cross-sectional view showing another embodiment of the push-in member. [Figure 8] FIG. 2 is an enlarged view of the upper right corner of the fourth frame in FIG. [Figure 9] FIG. 2 is an enlarged view of the lower right portion of the fourth frame in FIG. [Figure 10] This is a cross-sectional view taken at the upper part of each frame body, at the center of each frame body in the width direction. [Figure 11] FIG. 10 is an enlarged cross-sectional view of the upper left portion of FIG. [Figure 12]FIG. 11 is a cross-sectional view of the case where the push-in member shown in FIG. 6 is applied to FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Fig. 1 is an overall view (perspective view) of a seat wall 10 to which a sheet fixing device 8 according to one embodiment of the present invention is applied. The seat wall 10 is configured by stretching a sheet 14 on a surface 94 of a truss-shaped structural body 12. In Fig. 1, the sheet 14 is stretched only on a part of the right side of the structural body 12, but in reality, the sheet 14 is stretched over the entire surface 94 of the structural body 12. The surface 94 of the structural body 12 on which the sheet 14 is stretched corresponds to the surface located on the near side of the paper.

[0026] The structure 12 is composed of a plurality of frames (16, 18, 20, 22) arranged in the left-right direction. Specifically, the structure 12 is composed of a first frame 16, a second frame 18, a third frame 20, and a fourth frame 22, which are arranged in this order from the left to the right of the page. The first frame 16 to the fourth frame 22 are all configured to surround the structure on all four sides.

[0027] The first frame body 16 and the second frame body 18 are arranged so as to bend at a right angle. Furthermore, adjacent portions of the first frame body 16 and the second frame body 18 are formed of a common material. The second frame body 18 and the third frame body 20 are arranged so as to bend at a right angle. The third frame body 20 and the fourth frame body 22 are arranged so as to be aligned in a straight line. Furthermore, adjacent portions of the third frame body 20 and the fourth frame body 22 are formed of a common material.

[0028] The first frame body 16 is composed of a pair of longitudinally formed beam members 26A, 26B (beam members 26 if no distinction is made), a pair of longitudinally formed column members 28A, 28B (column members 28 if no distinction is made), and four dice members 30A, 30B, 30C, 30D (dice members 30 if no distinction is made) arranged at the four corners of the first frame body 16.

[0029] Beam member 26A constitutes the upper part of first frame body 16, and extends along the width direction of first frame body 16. Beam member 26B constitutes the lower part of first frame body 16, and extends along the width direction of first frame body 16.

[0030] 1 in the width direction of first frame body 16, and extends along the up-down direction of first frame body 16. Pillar member 28B constitutes the right side in Fig. 1 in the width direction of first frame body 16, and extends along the up-down direction of first frame body 16. Pillar member 28 is formed by connecting two members having the same shape as beam member 26 with bolts.

[0031] The cubes 30A to 30D respectively constitute the four corners of the first frame 16. The cube 30A is disposed at the upper left of the first frame 16 and is interposed between the left end of the beam 26A and the upper end of the column 28A. The cube 30B is disposed at the lower left of the first frame 16 and is interposed between the left end of the beam 26B and the lower end of the column 28A. The cube 30C is disposed at the upper right of the first frame 16 and is interposed between the right end of the beam 26A and the upper end of the column 28B. The cube 30D is disposed at the lower right of the first frame 16 and is interposed between the right end of the beam 26B and the lower end of the column 28B. The cubes 30 and the beam 26 are both detachably connected to each other via bolts, and the cubes 30 and the column 28 are both detachably connected to each other via bolts.

[0032] The second frame body 18 is composed of a pair of longitudinally formed beam members 26C, 26D (beam members 26 if no distinction is made), a pair of longitudinally formed column members 28B, 28C (column members 28 if no distinction is made), and four die members 30C, 30D, 30E, 30F (die members 30 if no distinction is made) arranged at the four corners of the second frame body 18.

[0033] Beam member 26C constitutes the upper part of second frame body 18, and extends along the width direction of second frame body 18. Beam member 26D constitutes the lower part of second frame body 18, and extends along the width direction of second frame body 18.

[0034] 1 in the width direction of the second frame body 18, and extends along the up-down direction of the second frame body 18. The pillar member 28C constitutes the right side of the second frame body 18 in the width direction of the second frame body 18 in FIG. 1, and extends along the up-down direction of the second frame body 18. The pillar member 28 is constituted by two members having the same shape as the beam member 26 connected with bolts. The pillar member 28B is a common member that constitutes the right side of the first frame body 16 and the left side of the second frame body 18.

[0035] The dice materials 30C to 30F respectively constitute the four corners of the second frame body 18. The dice material 30C is disposed at the upper left of the second frame body 18 and is interposed between the left end of the beam member 26C and the upper end of the pillar member 28B. The dice material 30D is disposed at the lower left of the second frame body 18 and is interposed between the left end of the beam member 26D and the lower end of the pillar member 28B. The dice material 30E is disposed at the upper right of the second frame body 18 and is interposed between the right end of the beam member 26C and the upper end of the pillar member 28C. The dice material 30F is disposed at the lower right of the second frame body 18 and is interposed between the right end of the beam member 26D and the lower end of the pillar member 28C. The dice material 30C is a common member that constitutes the upper right corner of the first frame body 16 and the upper left corner of the second frame body 18. The die material 30D is a common member that constitutes the lower right corner of the first frame 16 and the lower left corner of the second frame 18.

[0036] The third frame body 20 is composed of a pair of longitudinally formed beam members 26E, 26F (beam members 26 if no distinction is made), a pair of longitudinally formed column members 28D, 28E (column members 28 if no distinction is made), and four die members 30G, 30H, 30I, 30J (die members 30 if no distinction is made) arranged at the four corners of the third frame body 20.

[0037] Beam member 26E constitutes the upper part of third frame body 20, and extends along the width direction of third frame body 20. Beam member 26F constitutes the lower part of third frame body 20, and extends along the width direction of third frame body 20.

[0038] 1 in the width direction of the third frame body 20, and extends along the up-down direction of the third frame body 20. Pillar member 28E constitutes the right side in Fig. 1 in the width direction of the third frame body 20, and extends along the up-down direction of the third frame body 20. Pillar member 28 is formed by connecting two members having the same shape as beam member 26 with bolts.

[0039] The cube materials 30G to 30J respectively constitute the four corners of the third frame body 20. The cube material 30G is disposed at the upper left of the third frame body 20 and is interposed between the left end of the beam member 26E and the upper end of the pillar member 28D. The cube material 30H is disposed at the lower left of the third frame body 20 and is interposed between the left end of the beam member 26F and the lower end of the pillar member 28D. The cube material 30I is disposed at the upper right of the third frame body 20 and is interposed between the right end of the beam member 26E and the upper end of the pillar member 28E. The cube material 30J is disposed at the lower right of the third frame body 20 and is interposed between the right end of the beam member 26F and the lower end of the pillar member 28E.

[0040] The fourth frame body 22 is composed of a pair of longitudinally formed beam members 26G, 26H (beam members 26 if no distinction is made), a pair of longitudinally formed column members 28E, 28F (column members 28 if no distinction is made), and four dice members 30I, 30J, 30K, 30L (dice members 30 if no distinction is made) arranged at the corners of the fourth frame body 22.

[0041] The beam member 26G constitutes an upper portion of the fourth frame body 22, and extends along the width direction of the fourth frame body 22. The beam member 26H constitutes a lower portion of the fourth frame body 22, and extends along the width direction of the fourth frame body 22.

[0042] 1 in the width direction of the fourth frame body 22, and extends along the up-down direction of the fourth frame body 22. The pillar member 28F constitutes the right side in FIG. 1 in the width direction of the fourth frame body 22, and extends along the up-down direction of the fourth frame body 22. The pillar member 28 is constituted by two members having the same shape as the beam member 26 connected with bolts. The pillar member 28E is a common member that constitutes the right side of the third frame body 20 and the left side of the fourth frame body 22.

[0043] The cubes 30I to 30L respectively constitute the four corners of the fourth frame 22. The cube 30I is disposed at the upper left of the fourth frame 22 and is interposed between the left end of the beam 26G and the upper end of the pillar 28E. The cube 30J is disposed at the lower left of the fourth frame 22 and is interposed between the left end of the beam 26H and the lower end of the pillar 28E. The cube 30K is disposed at the upper right of the fourth frame 22 and is interposed between the right end of the beam 26G and the upper end of the pillar 28F. The cube 30L is disposed at the lower right of the fourth frame 22 and is interposed between the right end of the beam 26H and the lower end of the pillar 28F. The cube 30I is a common member that constitutes the upper right corner of the third frame 20 and the upper left corner of the fourth frame 22. The die material 30J is a common member that constitutes the lower right corner of the third frame 20 and the lower left corner of the fourth frame 22.

[0044] The sheet 14 is fixed at each top surface 92 of the first frame body 16 to the fourth frame body 22, the lower end sides of the surfaces 94 of the first frame body 16 to the fourth frame body 22, a side surface 70 located at the left end of the first frame body 16 in Fig. 1, and a side surface 72 located at the right end of the fourth frame body 22 in Fig. 1. The structure of a sheet fixing device 8 that fixes the sheet 14 at each of the above surfaces will be described later.

[0045] 2 is a diagram illustrating the structure of beam members 26A to 26H. In this embodiment, beam members 26A to 26H (hereinafter, beam members 26) all have the same shape and dimensions. Beam member 26 has a rectangular parallelepiped shape that extends longitudinally. Beam member 26 is formed in a square shape when viewed in the longitudinal direction.

[0046] The beam member 26 comprises four frame members 32 arranged at the four corners of a square when viewed in the longitudinal direction, eight connecting members 34 arranged at both ends of the frame members 32 in the longitudinal direction and interposed between adjacent frame members 32, and a plurality of lattice members 36 arranged at the middle of the frame members 32 in the longitudinal direction and interposed between adjacent frame members 32. The lattice members 36 function as reinforcing members for the beam member 26.

[0047] The frame members 32 are elongated members made of aluminum or an aluminum alloy, and are disposed at the four corners of a square when viewed in the longitudinal direction of the beam member 26.

[0048] FIG. 3 is a cross-sectional view of the frame member 32. The frame member 32 has a square cross section. Four rectangular holes 40A to 40D are formed inside the frame member 32. Each of the rectangular holes 40A to 40D penetrates the frame member 32 in the longitudinal direction. Each of the rectangular holes 40A to 40D is formed inward by a predetermined value X [mm] from each side (each edge) that forms the square of the frame member 32. The rectangular holes 40A and 40D are each formed in a square shape, and are disposed at positions facing each other with respect to the center of the frame member 32. The rectangular holes 40B and 40C are each formed in a rectangular shape, and are disposed at positions facing each other with respect to the center of the frame member 32.

[0049] One side of square hole 40A is longer than one side of square hole 40D. One side of square hole 40A is the same length as the long sides of square holes 40B and 40C. One side of square hole 40D is shorter than the short sides of square holes 40B and 40C.

[0050] In addition, a recessed groove 42A is formed between the square holes 40B and 40D, recessed from the edge of the frame member 32. The recessed groove 42A is formed at a position distance Y [mm] away from one of the two sides intersecting with the apex T1 of the square when the frame member 32 is viewed in the longitudinal direction. Similarly, a recessed groove 42B is formed between the square holes 40C and 40D, recessed from the edge of the frame member 32. The recessed groove 42B is formed at a position distance Y [mm] away from the other of the two sides intersecting with the apex T1 of the square when the frame member 32 is viewed in the longitudinal direction. The recessed grooves 42A and 42B are both formed continuously to both ends of the frame member 32 in the longitudinal direction, and the groove width W1 and the groove depth DP1 are both the same dimension.

[0051] The vertex T1 of the frame member 32 is positioned so as to overlap with each of the vertices TA to TD (see FIG. 2) of the square of the beam member 26 as viewed in the longitudinal direction. Therefore, as shown in FIG. 2, a pair of recessed grooves 42A, 42B is formed near each of the vertices TA to TD of the square of the beam member 26 as viewed in the longitudinal direction. Specifically, the pair of recessed grooves 42A, 42B is formed at a position spaced apart by the same distance Y [mm] from each side intersecting with each of the vertices TA to TD of the square of the beam member 26 as viewed in the longitudinal direction. The pair of recessed grooves 42A, 42B are both formed continuously over both ends of the beam member 26 in the longitudinal direction. Thus, the beam member 26 has a pair of recessed grooves 42A, 42B on four side surfaces corresponding to each side of the square as viewed in the longitudinal direction, extending in the longitudinal direction along both edges of each side surface and spaced apart by the same distance Y [mm] from each edge.

[0052] Returning to FIG. 2, the connecting member 34 is composed of a longitudinal member having an L-shaped cross section. The connecting member 34 is composed of, for example, an aluminum material. The connecting members 34 are disposed at both ends of the frame member 32 in the longitudinal direction along each side of the square of the beam member 26 as viewed in the longitudinal direction, and both ends of the connecting member 34 are connected to the adjacent frame members 32. The frame members 32 and the connecting member 34 are connected to each other by welding. In addition, the corners of the L-shaped cross section of the connecting member 34 are disposed so as to form the edges of the square of the beam member 26 as viewed in the longitudinal direction. Each connecting member 34 has a plurality of bolt holes 44 for connecting the beam member 26 and the cubic material 30 with bolts. In relation to this, the beam member 26 and the cubic material 30 are detachably connected with bolts, so that the frame can be assembled and disassembled at an exhibition venue or the like.

[0053] The column member 28 basically has the same shape as the beam member 26 shown in FIG. 2 and FIG. 3. In this embodiment, the column member 28 is configured by connecting members having the same shape and dimensions as the beam member 26 in the longitudinal direction. Therefore, the column member 28 has twice the dimensions of the beam member 26 in the longitudinal direction. The column member 28 also has a pair of grooves 42A, 42B on four side surfaces corresponding to each side of the square in the longitudinal view of the column member 28, which extend in the longitudinal direction along both edges of each side surface and are spaced the same distance Y [mm] from each edge. The pair of grooves 42A, 42B are both formed continuously over both ends of the column member 28 in the longitudinal direction. In addition, bolt holes 44 for connecting the column member 28 and the die material 30 with bolts are formed in each connecting member 34 constituting both ends of the column member 28 in the longitudinal direction. In relation to this, the pillar members 28 and the die members 30 are detachably connected with bolts, making it possible to assemble and disassemble the frame at an exhibition venue, etc.

[0054] A pair of recessed grooves 42A, 42B are formed in each of the beam members 26 and the pillar members 28, so that a pair of recessed grooves 42A, 42B extending along the width direction of each of the frame bodies 16-22 is formed in each corner of each of the beam members 26 constituting the first frame body 16-4 frame body 22. Similarly, a pair of recessed grooves 42A, 42B extending along the up-down direction of each of the frame bodies 16-22 is formed in each corner of each of the pillar members 28 constituting the first frame body 16-4 frame body 22.

[0055] In this embodiment, the column member 28 has a length twice that of the beam member 26, but the length of the beam member 26 and the column member 28 can be changed as appropriate. The beam member 26 and the column member 28 have basically the same structure in cross section, but only differ in longitudinal dimension. Therefore, if a plurality of members having the same structure as the beam member 26 and the column member 28 but different longitudinal dimensions are manufactured, the size of the frame body can be changed as appropriate by appropriately selecting the members used as the beam member 26 and the column member 28. Even if the size of the frame body is configured to be changeable, in this embodiment, the same sheet 14 can be reused as long as the sheet 14 is large enough to cover the surface 94 of the frame body.

[0056] FIG. 4 is a diagram illustrating the structure of the cube materials 30A to 30L. The cube materials 30A to 30L (hereinafter referred to as cube materials 30) all have the same shape and dimensions. The cube material 30 is formed into a cube, and is composed of groove forming members 48A to 48D (groove forming member 48 when no distinction is made) and angle members 50A to 50H (angle member 50 when no distinction is made), which are arranged along each side of the cube. A plurality of bolt holes 49 are formed in the groove forming member 48, and a plurality of bolt holes 51 are formed in the angle member 50. The groove forming member 48 and the angle member 50 correspond to the "element members" in the claims.

[0057] The groove forming member 48 and the angle member 50 are both formed in a longitudinal shape. Each angle member 50 has an L-shaped cross section. The groove forming member 48 has a cross section with the same shape as the frame member 32 described above (see FIG. 3). In relation to this, the groove forming member 48 has a square cross section. The groove forming member 48 is also formed with a recessed groove 46 extending along the longitudinal direction of the groove forming member 48.

[0058] FIG. 5 is a view of the cube material 30 of FIG. 4 as viewed from the direction of each arrow shown in FIG. 4. For example, the view A of FIG. 5 corresponds to the view of the cube material 30 of FIG. 4 as viewed from the direction of the arrow A. As shown in the views A, C to F of FIG. 5, the grooves 46 formed in the groove forming member 48 are formed on two side surfaces intersecting one side of the cube, extending in the longitudinal direction along the intersection line LX of the two side surfaces and at the same distance Y [mm] inward from the intersection line LX. Also, as shown in the view B of FIG. 5, when viewed in the longitudinal direction of the groove forming member 48 in which the grooves 46 are formed, the grooves 46 are formed at positions at the same distance Y [mm] away from two sides adjacent to each vertex TX, TY of the cube. That is, the groove forming member 48 has a pair of grooves 46 on two side surfaces intersecting one side of the cube of the die material 30, the pair extending in the longitudinal direction along the intersection line LX of the two side surfaces and spaced the same distance Y [mm] from the intersection line LX. The groove width W1 and groove depth DP1 of each groove 46 are the same dimensions as the grooves 42A, 42B (groove 42 when not distinguished) formed in the beam member 26 and the column member 28. The groove forming member 48 corresponds to the "element member in which a groove is formed" in the claims.

[0059] The die material 30 has an A view frame body 52, a B view frame body 54, a C view frame body 56, a D view frame body 58, an E view frame body 60, and an F view frame body 62 which constitute each face (A view surface to F view surface) of the cube of the die material 30.

[0060] The A-view frame body 52 is composed of a pair of groove forming members 48A, 48B and a pair of angle members 50A, 50B. The groove forming member 48A and the groove forming member 48B are connected to each other to form an L-shape. The angle member 50A and the angle member 50B are also connected to each other to form an L-shape, and the ends of the groove forming members 48A and 48B are connected to the ends of the angle members 50A and 50B, respectively, to form the A-view frame body 52 in a square shape with the same dimensions for each side. All of these are connected by welding. The A-view frame body 52 has a recessed groove 46 extending along the longitudinal direction of the groove forming members 48A and 48B.

[0061] The C-view frame body 56 is composed of a pair of groove forming members 48B, 48C and a pair of angle members 50C, 50D. The groove forming members 48B and 48C are connected to each other to form an L-shape. The angle members 50C and 50D are also connected to each other to form an L-shape, and the ends of the groove forming members 48B and 48C are connected to the ends of the angle members 50C and 50D, respectively, to form the square C-view frame body 56 with the same dimensions for each side. The C-view frame body 56 is also formed with a recessed groove 46 extending along the longitudinal direction of the groove forming members 48B and 48C.

[0062] The D-view frame 58 is composed of a pair of groove forming members 48A, 48D and a pair of angle members 50D, 50E. The groove forming member 48A and the groove forming member 48D are connected to each other to form an L-shape. The angle member 50D and the angle member 50E are also connected to each other to form an L-shape, and the ends of the angle members 50D, 50E are connected to the ends of the groove forming members 48A, 48D, respectively, to form the square-shaped D-view frame 58 with the same dimensions for each side. In addition, the D-view frame 58 has recessed grooves 46 extending along the longitudinal direction of the groove forming members 48A, 48D, respectively.

[0063] The E-view frame body 60 is composed of a groove forming member 48D and three angle members 50A, 50F, and 50G. The three angle members 50A, 50F, and 50G are connected to each other to form a U-shape, and both ends of the groove forming member 48D are connected to the ends of the angle members 50A and 50F so that the groove forming member 48D closes the opening formed in the U-shape. This forms the E-view frame body 60 in a square shape with the same dimensions for each side. In addition, the E-view frame body 60 is formed with a recessed groove 46 extending along the longitudinal direction of the groove forming member 48D.

[0064] The F-viewing frame 62 is composed of a groove forming member 48C and three angle members 50B, 50G, and 50H. The three angle members 50B, 50G, and 50H are connected to each other to form a U-shape, and the groove forming member 48C is connected to each end of the angle members 50B and 50H so that the groove forming member 48C closes the opening formed in the U-shape. This forms the F-viewing frame 62 in a square shape with the same dimensions for each side. In addition, the F-viewing frame 62 is formed with a recessed groove 46 extending along the longitudinal direction of the groove forming member 48C.

[0065] The B-view frame 54 is composed of four angle members 50C, 50E, 50F, and 50H. A pair of angle members 50C and 50E are connected to each other to form an L-shape, and a pair of angle members 50F and 50H are connected to each other to form an L-shape. In addition, an end of a groove forming member 48C is interposed between an end of the angle member 50C and an end of the angle member 50H, and these are connected to each other. Furthermore, a groove forming member 48D is interposed between an end of the angle member 50E and an end of the angle member 50F, and these are connected to each other. Therefore, a square-shaped B-view frame 54 is formed by the four angle members 50C, 50E, 50F, and 50H, including the end of the groove forming member 48C and the end of the groove forming member D.

[0066] As described above, in the die material 30, a pair of groove forming members 48A, 48B are connected to each other to form an L-shape on a single plane, and a pair of recessed grooves 46 are formed along the longitudinal direction in groove forming members 48C, 48D arranged perpendicular to the single plane from each end of groove forming members 48A, 48B forming the L-shape.

[0067] As shown in FIG. 1, each of the cube materials 30 is disposed at each of the four corners of the first frame body 16 to the fourth frame body 22. Each of the cube materials 30 is disposed so that a groove 46 is formed on the top surface 92 of each of the frames 16 to 22 along the width direction of each of the frames 16 to 22. Specifically, each of the cube materials 30 is disposed so that a groove 46 is formed on the top surface 92 of each of the frames 16 to 22 along the width direction near the edge of the front surface 94 side of each of the frames 16 to 22 (at a position inward by a distance Y [mm] from the edge). As a result, the groove 46 of the cube material 30 and the groove 42 of the beam members 26A, 26C, 26E, and 26G are continuously connected to each other near the edge of the front surface 94 side of each of the frames 16 to 22, thereby forming a groove 74 extending along the width direction of each of the frames 16 to 22.

[0068] Further, each of the cube materials 30 is arranged such that a groove 46 is formed along the width direction of each of the frame bodies 16-22 at a lower end position on the surface 94 of each of the frame bodies 16-22. As a result, the groove 46 of the cube material 30 and the grooves 42 of the beam members 26B, 26D, 26F, and 26H are continuously connected to each other on the lower end side of the surface 94 of each of the frame bodies 16-22, thereby forming a groove 76 extending along the width direction of each of the frame bodies 16-22.

[0069] The cube materials 30A, 30B located at the left end in the width direction of the first frame body 16 are arranged so that a groove 46 extending in the up-down direction is formed in the side surface 70 of the first frame body 16. As a result, the grooves 46 of the cube materials 30A, 30B and the groove 42 of the pillar member 28A are continuously connected to each other in the side surface 70 of the first frame body 16, thereby forming a groove 78 extending in the up-down direction of the first frame body 16.

[0070] The diced materials 30K, 30L located at the right end in the width direction of the fourth frame body 22 are arranged such that a groove 46 extending in the up-down direction is formed in the side surface 72 of the fourth frame body 22. As a result, the grooves 46 of the diced materials 30K, 30L and the groove 42 of the pillar member 28F are continuously connected to each other in the side surface 72 of the fourth frame body 22, thereby forming a groove 79 extending in the up-down direction of the fourth frame body 22.

[0071] For example, the die material 20A located at the upper left of the first frame 16 is arranged so that the A-view frame 52 is located on the top surface 92 side and the F-view frame 62 is located on the left side surface 70 side. At this time, as shown in Fig. 1, at the upper left of the first frame 16, a groove 46 (i.e., groove 74) extending along the width direction of the first frame 16 is formed on the surface 94 side of the top surface 92, and a groove 46 (i.e., groove 78) extending along the up-down direction is formed on the surface 94 side of the side surface 70.

[0072] Also, the die material 30B located at the lower left of the first frame 16 is arranged so that the D-view frame 58 is located on the surface 94 side and the E-view frame 60 is located on the left side surface 70 side. At this time, at the lower left of the first frame 16, a groove 46 (i.e., groove 76) extending along the width direction of the first frame 16 is formed on the lower end side of the surface 94, and a groove 46 (i.e., groove 78) extending along the up-down direction is formed on the surface 94 side of the side surface 70.

[0073] The die material 30C located at the upper right of the first frame 16 and the upper left of the second frame 18 is arranged so that the A-view frame 52 is located on the top surface 92 side, the C-view frame 56 is located on the surface 94 side of the first frame 16, and the D-view frame 58 is located on the surface 94 side of the second frame 18. At this time, a groove 46 (i.e., groove 74) extending along the width direction of the first frame 16 is formed on the surface 94 side of the top surface 92 at the upper right of the first frame 16, and a groove 46 (i.e., groove 74) extending along the width direction of the second frame 18 is formed on the surface 94 side of the top surface 92 at the upper left of the second frame 18.

[0074] The die material 30D located at the lower right of the first frame 16 and the lower left of the second frame 18 is arranged so that the D-view frame 58 is located on the surface 94 side of the first frame 16 and the C-view frame 56 is located on the surface 94 side of the second frame 18. At this time, a groove 46 (i.e., groove 76) extending along the width direction of the first frame 16 is formed on the lower end side of the surface 94 at the lower right of the first frame 16, and a groove 46 (i.e., groove 76) extending along the width direction of the second frame 18 is formed on the lower end side of the surface 94 at the lower left of the second frame 18.

[0075] The die material 30E located at the upper right of the second frame 18 is arranged so that the A-view frame 52 is located on the top surface 92 and the D-view frame 58 is located on the surface 94 side of the second frame 18. At this time, a groove 46 (i.e., groove 74) extending along the width direction of the second frame 18 is formed on the surface 94 side of the top surface 92 of the second frame 18 at the upper right of the second frame 18.

[0076] The die material 30F located at the lower right of the second frame 18 is arranged so that the C-view frame 56 is located on the surface 94 side of the second frame 18 and the groove forming member 48B constituting the C-view frame 56 is located at the lower end. At this time, a groove 46 (i.e., groove 76) extending along the width direction of the second frame 18 is formed at the lower end side of the surface 94 at the lower right of the second frame 18.

[0077] The die material 30G located at the upper left of the third frame 20 is arranged so that the A-view frame 52 is located on the top surface 92 side of the third frame 20 and the C-view frame 56 is located on the surface 94 side of the third frame 20. At this time, a groove 46 (i.e., groove 74) extending along the width direction of the third frame 20 is formed on the surface 94 side of the top surface 92 at the upper left of the third frame 20.

[0078] The die material 30H located at the lower left of the third frame 20 is arranged so that the D-view frame 58 is located on the surface 94 side of the third frame 20 and the groove forming member 48A constituting the D-view frame 58 is located at the lower end. At this time, a groove 46 (i.e., groove 76) extending along the width direction of the third frame 20 is formed at the lower end side of the surface 94 at the lower left of the third frame 20.

[0079] The die material 30I located at the upper right of the third frame 20 and the upper left of the fourth frame 22 is arranged so that the A-view frame 52 is located on the top surface 92 side of the third frame 20 and the fourth frame 22, and the C-view frame 56 is located on the surface 94 side of the third frame 20 and the fourth frame 22. At this time, at the upper right of the third frame 20 and the upper left of the fourth frame 22, a groove 46 (i.e., groove 74) extending along the width direction of the third frame 20 and the fourth frame 22 is formed on the surface 94 side of the top surface 92.

[0080] The die material 30J located at the lower right of the third frame 20 and the lower left of the fourth frame 22 is arranged so that the D-view frame 58 is located on the surface 94 side of the third frame 20 and the fourth frame 22, and the groove forming member 48A constituting the D-view frame 58 is located at the lower end. At this time, the lower right of the third frame 20 and the lower left of the fourth frame 22 have a recessed groove 46 (i.e., recessed groove 76) formed on the lower end side of the surface 94, which extends along the width direction of the third frame 20 and the fourth frame 22.

[0081] The die material 30K located at the upper right of the fourth frame 22 is arranged so that the A-view frame 52 is located on the top surface 92 side and the D-view frame 58 is located on the side surface 72 side. At this time, at the upper right of the fourth frame 22, an L-shaped groove 46 (i.e., groove 74) is formed on the top surface 92, and a groove 46 (i.e., groove 79) extending along the vertical direction is formed on the side surface 72.

[0082] The die material 30L located at the lower right of the fourth frame 22 is arranged so that the D-view frame 58 is located on the front surface 94 side and the C-view frame 56 is located on the side surface 72 side. At this time, an L-shaped groove 46 (i.e., groove 76) is formed on the lower end side of the front surface 94 and the side surface 72 at the lower right of the fourth frame 22, and a groove 46 (i.e., groove 79) extending in the up-down direction is formed on the side surface 72.

[0083] With the sheet 14 inserted in each of the grooves 74, 76, 78, 79 (hereinafter referred to as groove 74, etc.) formed in each of the above-mentioned frames 16-22, a push-in member 80 is pushed into the groove 74, etc. At this time, the sheet 14 is clamped between the wall surface of the groove 74, etc. and the push-in member 80, so that the sheet 14 is fixed in the groove 74, etc. The sheet fixing device 8 of this embodiment is composed of each of the grooves 74, etc. formed in each of the frames 16-22 and a push-in member 80 (or a push-in member 88 described later) that is pushed into each of the grooves 74, etc.

[0084] The push-in member 80 is formed in a longitudinal shape (see Figs. 8 and 9) like the grooves 74 so that it can be pushed in along the longitudinally extending grooves 74. Fig. 6 is a cross-sectional view of the push-in member 80 cut along a plane perpendicular to the longitudinal direction. In Fig. 6, a pair of opposing wall surfaces 98A, 98B of the grooves 74 are indicated by two-dot chain lines. As shown in Fig. 6, the push-in member 80 includes a push-in portion 82 that is pushed into the grooves 74 and a pair of flange portions 84 that come into contact with the frames 16-22 when the push-in portion 82 is pushed into the grooves 42. The push-in member 80 is made of a resin material such as EVA (ethylene-vinyl acetate copolymer resin). The push-in member 80 is not limited to a resin material, and may be made of rubber, silicon, or the like.

[0085] The push-in portion 82 is formed in a longitudinal shape so as to be pushed along the recessed grooves 74 and the like. The push-in portion 82 has a tapered shape so as to be easily pushed into the recessed grooves 74 and the like. A pair of flanges 84 protrude from the base of the push-in portion 82 in a direction perpendicular to the center CL of the push-in portion 82. The flanges 84 are sized to be able to abut against the respective frames 16-22 when the push-in member 80 is pushed into the recessed grooves 74 and the like. In addition, the flanges 84 are set so that the amount of the push-in portion 82 into the recessed grooves 74 and the like is an appropriate value when the flanges 84 abut against the respective frames 16-22. Therefore, the operator can push the push-in member 80 until the flanges 84 abut against the respective frames 16-22, so that the amount of the push-in portion 82 into the recessed grooves 74 and the like is always an appropriate value.

[0086] Further, the pushing-in portion 82 is formed with a pair of protrusions 86 that protrude toward the opposing wall surfaces 98A, 98B of the recessed groove 74. The pair of protrusions 86 are also formed in an elongated shape so that they can be pushed in along the recessed groove 74.

[0087] A dimension DP2 in the depth direction based on the flange 84 of the push-in portion 82 is set to be substantially the same as or shorter than the depth DP1 of the grooves such as the recessed groove 74. In addition, a dimension W2 between the apexes of a pair of protrusions 86 is set to be equal to or longer than the groove width W1 of the recessed groove 74.

[0088] Fig. 7 is a cross-sectional view of a push-in member 88 having a different shape from the push-in member 80. The push-in member 88 in Fig. 7 also has a push-in section 82 of the same dimensions as the push-in member 80, and a pair of flanges 90A and 90B. In the push-in member 88, the dimension LA from the push-in section 82 to the tip of the flange 90A is longer than the dimension LB from the push-in section 82 to the tip of the flange 90B. The push-in member 88 is preferably used in cases where the end of the sheet 14 is hidden by the flange 90B, for example, on the lower end side of the surface 94 of each frame 16-22.

[0089] FIG. 8 is an enlarged view of the upper right of the fourth frame 22 in FIG. 1. As shown in FIG. 8, a groove 74 is formed on the top surface 92 of the fourth frame 22 along the edge on the surface 94 side. The groove 74 formed on the top surface 92 is formed in an L-shape along the surface 94 of the fourth frame 22 and the side surface 72 of the fourth frame 22. When the pressing member 80 is pressed in with the sheet 14 inserted in the L-shaped groove 74, the sheet 14 is sandwiched and compressed between the walls 98A and 98B of the groove 74 and the protrusion 86 formed on the pressing portion 82 in the groove 74. As a result, the sheet 14 is fixed on the top surface 92 of the fourth frame 22.

[0090] 9 is an enlarged view of the lower right of the fourth frame 22 in FIG. 9. As shown in FIG. 9, a groove 76 extending along the width direction of the fourth frame 22 is formed on the lower end side of the surface 94 of the fourth frame 22. For example, a push-in member 88 is pushed into this groove 76 with the sheet 14 sandwiched therebetween, whereby the sheet 14 is fixed on the lower end side of the surface 94 of the fourth frame 22. In addition, a groove 76 is also formed on the lower end of the side surface 72 of the fourth frame 22, so that the push-in member 88 is also pushed into this groove 76 with the sheet 14 sandwiched therebetween, whereby the sheet 14 is fixed on the lower end side of the side surface 72 of the fourth frame 22.

[0091] In addition, although not shown in Figures 8 and 9, a groove 79 extending in the vertical direction is formed in the side surface 72 of the fourth frame body 22, and when the pushing member 80 (or the pushing member 88) is pushed in with the sheet 14 inserted into this groove 79, the sheet 14 is fixed to the side surface 72.

[0092] In addition, with respect to the first frame body 16, the sheet 14 is fixed by pushing in the pushing member 80 (or the pushing member 88) with the sheet 14 inserted into the groove 74 formed in the top surface 92 of the first frame body 16, the groove 76 formed on the lower end side of the surface 94, and the groove 78 formed in the side surface 70 located on the left side.

[0093] In addition, with respect to the second frame body 18, the sheet 14 is fixed by pushing the insertion member 80 (or the insertion member 88) into the groove 74 formed in the top surface 92 of the second frame body 18 and the groove 76 formed on the lower end side of the surface 94 with the sheet 14 inserted therein.

[0094] In addition, with respect to the third frame body 20, the sheet 14 is fixed by pushing the insertion member 80 (or the insertion member 88) into the recessed groove 74 formed in the top surface 92 of the third frame body 20 and the recessed groove 76 formed on the lower end side of the surface 94 with the sheet 14 inserted therein.

[0095] FIG. 10 is a cross-sectional view of the upper part of each frame 16-22, cut at the center of the width of each frame 16-22, and FIG. 11 is a cross-sectional view of an enlarged upper left portion of FIG. 10. As shown in FIG. 10 and FIG. 11, a groove 74 is formed on the surface 94 side of the top surface 92 of each frame 16-22, and the press-in part 82 of the press-in member 88 is pressed in with the sheet 14 in the groove 74. The sheet 14 is in a U-shape in the groove 74 along the wall surface of the groove 74. When the press-in part 82 is pressed into the groove 74 from this state, the sheet 14 is sandwiched between a pair of protrusions 86 formed on the press-in part 82 and the wall surfaces 98A, 98B (see FIG. 6) of the groove 74. As a result, the sheet 14 is fixed in the groove 74. FIG. 12 shows a state in which the press-in member 80 is pressed in instead of the press-in member 88 of FIG. 11. Even in this case, the sheet 14 is clamped between the projection 86 of the insertion portion 82 and the wall surfaces 98A, 98B of the recessed groove 74, so that the sheet 14 is fixed.

[0096] As described above, in the sheet fixing device 8 according to the above embodiment, when fixing the sheet 14 to the structure 12, it is only necessary to push the push-in members 80, 88 into the recessed grooves 74, etc., with the sheet 14 inserted in the recessed grooves 74, 76, 78, 79 formed in each of the frames 16 to 22. Therefore, the sheet 14 and the push-in members 80, 88 are configured separately, and it is not necessary to attach the push-in members 80, 88 to the sheet 14. In addition, even if the push-in members 80, 88 deteriorate and the holding force of the sheet 14 in the recessed grooves 74, etc. decreases, it is only necessary to replace the push-in members 80, 88, and the sheet 14 can be used continuously. As a result, it is possible to reduce the cost of the sheet fixing device 8.

[0097] In the above embodiment, the sheet is fixed along the width direction of each frame body 16-22 on the top surface 92 of each frame body 16-22 and on the lower end side of the surface 94 of each frame body 16-22, so that the mounting structure of the upper part of the sheet 14 becomes inconspicuous from the surface 94 side. Also, by fixing the sheet 14 on the lower end side of the surface 94 of each frame body 16-22, the mounting structure of the sheet 14 located at the lower end of the surface 94 of each frame body 16-22 becomes inconspicuous.

[0098] Furthermore, in the above embodiment, the sheet 14 is fixed in the up-down direction to the side surface 70 of the first frame 16 and the side surface 72 of the fourth frame 22, so that the sheet 14 can be firmly fixed. Furthermore, the mounting structure of the sheet 14 is not noticeable from the front surface 94 side of each of the frames 16-22.

[0099] In the above embodiment, the beam members 26 and the diced materials 30 are detachably coupled, and the pillar members 28 and the diced materials 30 are detachably coupled, so that by preparing a plurality of beam members 26 and pillar members 28 of different lengths, the size of each of the frame bodies 16-22 can be appropriately changed. In this case, within the range where the sheet 14 can cover the front surface 94 side of each of the frame bodies 16-22, the same sheet 14 can be reused even if the size of each of the frame bodies 16-22 is changed.

[0100] Furthermore, in the above embodiment, regardless of whether the top surface 92 and the surface 94 of each of the frame bodies 16-22 are formed from any of the four side surfaces of the beam member 26, the lower ends of the top surface 92 and the surface 94 of each of the frame bodies 16-22 have recessed grooves 74, 76 formed along the width direction of each of the frame bodies 16-22. Similarly, regardless of whether the side surface 70 of the first frame body 16 and the side surface 72 of the fourth frame body 22 are formed from any of the four side surfaces of the pillar member 28, the side surface 70 of the first frame body 16 and the side surface 72 of the fourth frame body 22 have recessed grooves 78, 79 formed along the up-down direction in the side surface 70 of the first frame body 16 and the side surface 72 of the fourth frame body 22.

[0101] In addition, in the above embodiment, by adjusting the position of the faces of the dice material 30 arranged at the four corners of each frame body 16-22, it is possible to realize all of the following: groove 74 formed on the top surface 92 of each frame body 16-22, groove 76 formed on the lower end side of the surface 94 of each frame body 16-22, groove 78 formed on the side surface 70 of the first frame body 16, and groove 79 formed on the side surface 72 of the fourth frame body 22.

[0102] Furthermore, in the above embodiment, when the pushing-in section 82 is pushed into the recessed groove 74, etc. with the sheet 14 inserted within the recessed groove 74, etc., the sheet 14 is clamped between the protrusion 86 of the pushing-in section 82 and the wall surfaces 98A, 98B of the recessed groove 74, etc., so that the sheet 14 can be fixed within the recessed groove 74, etc.

[0103] [Variations] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment, and may be appropriately modified within the scope of the gist of the invention. For example, in the above embodiment, the structure 12 is composed of the first frame body 16 to the fourth frame body 22 arranged in the horizontal direction, but the number of frame bodies is not limited to four. For example, it may be composed of only one frame body, or may be composed of five or more frame bodies.

[0104] In the above embodiment, the first frame body 16 to the fourth frame body 22 all have the same dimensions, but the first frame body 16 to the fourth frame body 22 may have different dimensions in the width direction and the up-down direction. In other words, the first frame body 16 to the fourth frame body 22 may be composed of beam members 26 or column members 28 having different dimensions in the longitudinal direction.

[0105] In the above embodiment, the pillar member 28 is configured by connecting two members, but the pillar member 28 may be configured by one member, or may be configured by connecting three or more members. Also, the beam member 26 may be configured by connecting two or more members.

[0106] In the above embodiment, the die material 30 includes four groove forming members 48A to 48D, i.e., the groove forming member 48A forming the A-view frame body 52 and the D-view frame body 58, the groove forming member 48B forming the A-view frame body 52 and the C-view frame body 56, the groove forming member 48C forming the C-view frame body 56 and the F-view frame body 62, and the groove forming member 48D forming the D-view frame body 58 and the E-view frame body 60. However, the present invention is not limited to this. For example, the groove forming member 48 having the groove 46 formed therein may be used in all the portions forming each side of the die material 30. In short, it is sufficient that the groove 46 can be formed at an appropriate position in the corner of the frame body by adjusting the position of the face of the die material 30.

[0107] In the above embodiment, the protrusion 86 is formed on the pushing portion 82 of the pushing member 80, but the protrusion 86 is not necessarily required. That is, the embodiment can be implemented without the protrusion 86. For example, at least a part of the thickness of the pushing portion 82 that faces the wall surfaces 98A, 98B of the recessed groove 74 or the like when the pushing portion 82 is pushed into the recessed groove 74 or the like is set to be equal to or larger than the dimension of the groove width W1 of the recessed groove 74 or the like. In this way, when the pushing portion 82 is pushed into the recessed groove 74 or the like, the sheet 14 is sandwiched between the pushing portion 82 and the wall surfaces of the recessed groove 74 or the like, and the sheet 14 can be fixed in the recessed groove 74 or the like.

[0108] In the above embodiment, the protrusions 86 formed on the insertion portion 82 may be provided in a plurality of pieces in the depth direction of the insertion portion 82 .

[0109] In the above embodiment, the structure 12 is made of aluminum material, but it is not necessary that the entire structure is made of aluminum material, and a part of the structure may be made of iron material. [Explanation of symbols]

[0110] 8: Seat fixing device 12: Structure 14: Sheet 16: First frame (frame) 18: Second frame (frame) 20: 3rd frame (frame) 22: 4th frame (frame) 26: Beam member 28: Pillar member 30: Dice material 42A, 42B: Concave groove 46: Groove 48A, 48B, 48C, 48D: Groove forming member (element member in which a concave groove is formed) 50: Angle member (element member) 70: Side 72: Side 74, 76, 78, 79: Groove 80A, 80B: Pressing parts 82: Closet 84: Tsuba section 86: Protrusion 88: Closet parts 90: Tsuba section 92: Top 94: Surface 98A, 98B: Wall LX: Intersection line Y:Distance

Claims

1. A sheet fixing device for fixing a sheet stretched on a surface of a truss-like structure, comprising: A longitudinal groove formed in the structure; a longitudinal pushing member that is pushed into the groove; When the sheet is inserted into the groove, the pushing member is pushed into the groove, whereby the sheet is clamped and fixed between the groove and the pushing member. A seat fixing device characterized by:

2. The structure is composed of one or more frames configured to surround the structure on all four sides, The recessed groove is formed on the top surface of the frame body and on the lower end side of the front surface of the frame body along the width direction of the frame body.

2. The seat fixing device according to claim 1 .

3. The structure is composed of one or more frames configured to surround the structure on all four sides, The recessed groove is formed on a side surface of the frame body along the up-down direction of the frame body.

3. The seat fixing device according to claim 2.

4. The frame body is A pair of beam members that form an upper portion and a lower portion of the frame body and extend along a width direction of the frame body; A pair of column members that define both sides of the frame body in the width direction and extend along the up-down direction of the frame body; four cube members that form corners of the frame body and are interposed between the ends of the beam members and the ends of the column members; The beam member and the cubic material are detachably connected, and the column member and the cubic material are detachably connected.

4. The seat fixing device according to claim 2 or 3.

5. The beam member and the column member are formed into a square shape when viewed in the longitudinal direction, The beam member and the column member each have a pair of the grooves on four side surfaces corresponding to each side of the square, the grooves extending in the longitudinal direction along both edges of each side surface and spaced the same distance from each edge.

5. The seat fixing device according to claim 4.

6. The diced material is formed into a cube, The cube material is constructed by connecting ends of element members extending along each side of the cube to each other, The groove is formed at least in two of the element members that are connected to each other to form an L-shape on a single plane, and in a pair of the element members that extend perpendicularly to the single plane from both ends of the two element members that form the L-shape, The element member in which the groove is formed has the groove extending in the longitudinal direction along the intersection line between the two side surfaces on two side surfaces intersecting one side of the cube and spaced the same distance from the intersection line.

5. The seat fixing device according to claim 4.

7. The pushing member includes a pushing portion formed in a longitudinal direction to be pushed into the groove, The push-in portion is formed with a pair of protrusions protruding toward opposing wall surfaces of the recessed groove, The dimension between the apexes of the pair of protrusions is set to be equal to or greater than the width of the recessed groove.

2. The seat fixing device according to claim 1 .

8. The pushing member is formed with a flange portion that comes into contact with the frame body when the pushing portion is pushed into the recessed groove.

8. A seat fixing device according to claim 7.

Images