JP2008038492A - Dome structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dome structure reduced in overall weight and manufactured at low cost. <P>SOLUTION: This dome structure comprises a lattice dome structure 2 formed of lattice members 10 and joint members 20 and reinforcement frames 30. The reinforcement frames 30 are joined, in a ring shape, to the joint members 20 arranged on the same contour line on the dome surface of the lattice dome structure 2 coaxially with each other to form ring reinforcement members 31. The ring reinforcement members 31 are formed in a polygon by rigidly joining the reinforcement frames 30 to each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dome structure including a lattice dome structure formed of a plurality of lattice members and a node member.

  As shown in FIG. 12, the lattice dome structure 101 is configured by assembling a horizontal lattice material 103 and an oblique lattice material 104 in a mesh shape via a node member 102, and the lattice material ( The horizontal lattice material 103 and the oblique lattice material 104) are resisted by an in-plane force (axial force).

The conventional lattice dome structure 101 is designed to maintain the structural strength of the entire dome with the horizontal lattice material 103, the oblique lattice material 104, and the node member 102 connecting them. On the other hand, the covering material of the dome is supported by a support frame that is bridged and fixed between the node members 102 (see FIGS. 1 and 4 of Patent Document 1). Although this support frame was fixed to the node member, adjacent support frames were not fixed to each other.
Japanese Patent Laid-Open No. 6-200598

  In the conventional lattice dome structure 101, the support frame has a function of supporting and fixing the jacket material, and is attached in a state overlapping with the horizontal lattice material 103 and the oblique lattice material 104, but the adjacent support frames are fixed. It did not increase the strength of the dome structure itself.

  Among the dome structures, particularly in the dome structure covering a large space, the area of the dome structure itself is large, and in order to increase the strength, the size of the horizontal lattice material 103 or the oblique lattice material 104 is increased or the number of members is increased. Or the weight becomes very large. Furthermore, since the support frame for supporting the covering material of a large area is attached to the surface, the ratio of the members other than the structural material is large, the overall weight of the lattice dome structure is increased, and the manufacturing cost is increased. There was a problem of being invited.

  Therefore, the present invention has been devised to solve the above-described problems, and an object thereof is to provide a dome structure that can reduce the overall weight and reduce the manufacturing cost.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a lattice dome structure formed of a plurality of lattice members and a node member, and a reinforcement frame, and the reinforcement frame is used as a dome surface of the lattice dome structure. A dome structure is characterized in that a ring-shaped reinforcing member is formed by joining a plurality of node members arranged on the same contour line and concentrically in a ring shape.

  According to the above configuration, by providing the ring-shaped reinforcing member on the lattice dome structure, the out-of-plane load applied to the dome is efficiently distributed to the in-plane force (axial force) between the lattice dome structure and the ring-shaped reinforcing member. The weight of the entire dome structure can be reduced, and the manufacturing cost can be reduced.

  The invention according to claim 2 is the dome structure according to claim 1, wherein the ring-shaped reinforcing member is formed by rigidly joining the plurality of reinforcing frames to each other, and is formed in a polygonal shape. is there.

  According to the above configuration, since the ring-shaped reinforcing member is formed into a polygonal shape by rigidly joining the reinforcing frames to each other, even if a force such as blowing is applied to the dome structure and a compressive force is applied to the reinforcing frame, the seat It is hard to bend.

  The invention according to claim 3 is characterized in that the ring-shaped reinforcing member is joined to the outside of the lattice dome structure, and an outer covering material of the dome is supported by the ring-shaped reinforcing member. The dome structure according to claim 2.

  According to the said structure, since the support frame for supporting the jacket material of a roof can be abbreviate | omitted, the ratio for which the structural material of the whole dome occupies can be increased, and a member can be utilized structurally effectively. Therefore, a significant reduction in the overall weight can be achieved, and the manufacturing cost can be greatly reduced.

  According to the present invention, it is possible to reduce the overall weight of the dome structure and to achieve an excellent effect that the manufacturing cost can be reduced.

  The best mode for carrying out the dome structure according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view showing the best mode for carrying out the dome structure according to the present invention, and FIG. 2A is an overall plan view showing the best mode for carrying out the dome structure according to the present invention. FIGS. 3A and 3B are plan views showing the reinforcing frame, FIG. 3 is a perspective view showing a joined state between the node member and the reinforcing frame, and FIG. 4A shows a joined state between the node member and the reinforcing frame. FIG. 5 is a sectional view taken along the line AA in FIG. 4, FIG. 6 is a sectional view taken along the line BB in FIG. 4, and FIG. 7A is a joined state between the reinforcing frames. (B) is the CC sectional view taken on the line of (a), (c) is a disassembled perspective view.

  First, the configuration of the dome structure 1 according to the present embodiment will be described.

  As shown in FIGS. 1 and 2, the dome structure 1 according to the present invention includes a lattice dome structure 2 formed by a plurality of lattice materials 10 and a node member 20 (see FIG. 3) that joins the lattice materials 10 to each other. And a reinforcing frame 30 that reinforces the lattice dome structure 2.

  As shown in FIG. 3, the lattice material 10 according to the present embodiment is made of, for example, an extruded shape member 11 made of aluminum or aluminum alloy, is formed in a pipe shape having a circular cross section, and has flat connection ends at both ends thereof. Part 10a. The lattice material 10 is divided into a horizontal lattice material 12 that extends in the horizontal direction and an oblique lattice material 13 that extends in the inclination direction. The horizontal lattice members 12 are connected so as to form a plurality of concentric polygonal rings in plan view. Note that the lattice material 10 is not limited to the extruded shape 11 made of aluminum or aluminum alloy, and may be composed of other members or alloys such as steel, stainless steel, and titanium. Moreover, wood may be used, and the shape is not limited to a pipe shape with a circular cross section, and may be, for example, an H cross section shape, a square pipe shape, or a solid rod shape.

  The connecting end portion 10a is formed by crushing both ends of the extruded shape member by pressing or the like. Further, at the tip of the connecting end portion 10a, an unevenness 10b is formed in a direction having an angle with the axis of the lattice material 10 (which can form a dome shape), and a connecting groove 20a of the node member 20 to be described later. Can be fitted. In addition, since the connection end part 10a is formed in the flat shape long in the axial direction of the node member 20, a strong joint structure is formed with respect to the external force in the axial direction of the node member.

  The node member 20 has a cylindrical shape, and a plurality of connecting grooves 20a are formed on the outer peripheral surface along the axial direction. Further, a bolt insertion hole 20b is formed in the center of the node member 20 along the axial direction. The node member 20 is made of an extruded shape made of an aluminum alloy, and the connecting groove 20a and the bolt insertion hole 20b are formed when the aluminum alloy is extruded. The node member 20 may be manufactured by casting or forging. Further, the shape of the nodal member 20 is not limited to that shown in the drawing, and may be a prismatic shape or other shapes.

  The connection groove 20a of the node member 20 has the same cross-sectional shape as the tip end portion of the connection end portion 10a of the lattice material 10, and the connection end portion 10a can be fitted therein. Further, the inner wall surface of the connecting groove 20a is formed with unevenness 20c that engages with the unevenness 10b of the connection end 10a. The plurality of connecting grooves 20a are formed radially about the bolt insertion hole 20b.

  When the lattice material 10 is connected to the node member 20, the irregularities 10b formed on the connection end portion 10a of the lattice material 10 may be fitted into the connecting groove 20a from the upper surface side (or lower surface side) of the node member 20. . At this time, since welding or a special tool is not required, workability is good. Note that an adhesive or the like may be poured into the connecting groove 20a in order to fill a minute gap generated between the connecting groove 20a and the connecting end 10a.

  Thus, when the connection end 10a of the lattice material 10 is fitted into the connection groove 20a of the node member 20, the concave and convex portions 10b and 20c formed in each of the connection groove 20a and the connection end 10a are engaged with each other. The material 10 does not slip out in the axial direction.

  In addition, washers 20 d for preventing the lattice material 10 from slipping out are attached to the upper and lower surfaces of the node member 20. The washer 20d is fixed by a bolt B1 (see FIG. 4A) and a nut N1 (see FIG. 4A) inserted through the bolt insertion hole 20b of the node member 20.

  As shown in FIG. 2, the reinforcing frame 30 that reinforces the lattice dome structure 2 formed by the lattice material 10 and the node member 20 is arranged on the same contour line on the dome surface of the lattice dome structure 2 and concentrically. The ring-shaped reinforcing member 31 is configured by being joined to the plurality of node members 20 in a ring shape. That is, the ring-shaped reinforcing member 31 is divided into a plurality of portions in the circumferential direction, and the reinforcing frame 30 constitutes the divided members. Adjacent reinforcing frames 30 are rigidly joined to each other. The ring-shaped reinforcing member 31 is formed in a polygonal shape. The ring-shaped reinforcing member 31 is formed for each of a plurality of contour lines, and is formed in a plurality of stages (in this embodiment, five stages).

  As shown in FIG. 3, the reinforcing frame 30 is made of an extruded shape made of aluminum or aluminum alloy. The reinforcing frame 30 includes a plurality of (three in the present embodiment) pipe members 30a, 30b, and 30b (see FIG. 2B) each having a circular cross section made of an extruded profile. It is formed by joining by circumferential welding so that 30b and 30b cross at a predetermined angle. The bending angle (intersection angle of the pipe material) of the reinforcing frame 30 is equal to the angle formed by the pair of horizontal lattice members 12 and 12 supported by the node member 20 to which the reinforcing frame 30 is attached. As shown in FIG. 2B, a joint plate 41 (see FIG. 7 for details) is provided at the end of the reinforcing frame 30. Via the joint plate 41, the pipe member 30 b at the end of the reinforcing frame 30 is joined coaxially with the pipe member 30 b at the end of the adjacent reinforcing frame 30. The pipe member 30b at the end of the reinforcing frame 30 is connected to the pipe member 30b at the end of the adjacent reinforcing frame 30, so that the length is equal to the distance between the adjacent node members 20 and 20. . The reinforcement frames 30 and 30 are joined to each other at an intermediate position between the adjacent node members 20 and 20. In the present embodiment, the reinforcing frame 30 is configured by joining three pipe members. However, the number of the reinforcing frames 30 is not limited to this, and the number of the reinforcing frames 30 may be four. It may be as described above, and is appropriately determined within the range of the transportable length.

  As shown in FIG. 3, the reinforcing frame 30 is fixed to the node member 20 via a frame receiving member 32 and a frame pressing member 33. The frame receiving member 32 includes a groove portion 32a having an arcuate cross section and flange portions 32b and 32b formed on both sides thereof. The groove portion 32 a has an inner peripheral surface that matches the outer peripheral surface of the reinforcing frame 30, and is bent in the same manner as the reinforcing frame 30. A bolt fixing plate 32c is integrally formed below the groove 32a. The bolt fixing plate 32c is formed in a flat plate shape, and is formed at a predetermined interval from the bottom of the groove 32a. A through hole 32da through which the head B1a of the bolt B1 can pass is formed at the bottom of the groove 32a. A bolt through hole 32d is formed in the bolt fixing plate 32c, and a head B1a of the bolt B1 is fixed to an upper portion thereof. The through hole 32da has a size that allows a bolt tightening tool to be inserted. By screwing a nut N1 (see FIG. 4A) to the bolt B1, the bolt fixing plate 32c, the upper washer 20d, the node member 20 and the lower washer 20d are fixed.

  The flange portion 32b is formed to be widened on both sides in the width direction of the groove portion 32a, and bolt holes 32e are formed in the vicinity of both axial ends of the groove portion 32a. A bolt B2 for fixing the frame pressing member 33 to the frame receiving member 32 is inserted into the bolt hole 32e. The flange 32b is formed with a bolt hole 32f through which a bolt B3 (see FIG. 4A and FIG. 5) for fixing a gutter material 51 to be described later is inserted.

  The frame receiving material 32 having such a configuration is formed of an extruded shape made of aluminum or aluminum alloy, and the end portions of the two extruded shapes are obliquely cut and welded to be integrated. It is formed in the shape. The bolt through holes 32d and the bolt holes 32e and 32f are formed by drilling after the frame receiving material 32 is integrated by welding.

  The frame pressing member 33 includes a pressing portion 33a having an inverted U-shaped cross section and flange portions 33b formed at both ends of the pressing portion 33a. The frame pressing member 33 is formed by bending a plate made of aluminum or aluminum alloy, or is formed by cutting an extruded shape member made of aluminum alloy. The presser portion 33 a is curved with a radius of curvature equivalent to that of the outer peripheral surface of the reinforcing frame 30. Bolt holes 33c are formed in the flange portion 33b. By inserting the bolt B2 into the bolt hole 33c and the bolt hole 32e of the frame receiving member 32 and tightening with the nut N2, the reinforcing frame 30 is pressed and fixed from above.

  By the way, as shown in FIG. 7, joining of the edge parts of the adjacent reinforcement frames 30 and 30 is bolt joining. A circular plate 40 that closes the opening having a circular cross section is fixed to the end of the reinforcing frame 30 by welding. A joint plate 41 having a cross-shaped cross section is fixed to the surface of the circular plate 40 by welding. The joint plate 41 is disposed so as to extend along the axial direction of the reinforcing frame 30. Bolt holes 41b (see FIG. 7C) are formed in each plate 41a of the joint plate 41, respectively. A plurality of bolt holes 41b are formed in each plate 41a at a predetermined interval along the axial direction of the reinforcing frame 30 (two places in the present embodiment).

  The joint plates 41, 41 at the ends of the adjacent reinforcing frames 30, 30 are abutted against each other. Each joint plate 41 and 41 is arrange | positioned so that the surface of each plate 41a and 41a mutually face | matched may become the same surface, respectively. Between the joint plates 41 and 41 adjacent to each other, an attachment plate 43 is bridged and provided. The attachment plate 43 has an axial length approximately twice that of the joint plate 41. A bolt hole 43 a is formed in the attachment plate 43 at a position corresponding to the bolt hole 41 b of the adjacent joint plate 41. The attachment plate 43 is attached to both the front and back surfaces of each plate 41a, and is configured to be fixed integrally by sandwiching the plate 41a from both sides by fastening with bolts B4 and nuts N4. In this way, the joint plate 41 having a cross-shaped cross section is used to attach and fix the attachment plate 43 in both the horizontal direction and the vertical direction, so that the adjacent reinforcing frames 30 and 30 are coaxially connected. It can be rigidly joined.

  As shown in FIGS. 4 and 5, a gutter material 51 for fixing an outer covering material 50 covering the surface of the lattice dome structure 2 is provided on the upper portion of the reinforcing frame 30. The gutter material 51 is arranged radially from the center of the upper end of the lattice dome structure 2 and is configured to be substantially orthogonal to the plurality of ring-shaped reinforcing members 31 (see FIG. 2). The gutter material 51 includes a groove portion 51a that opens to the top, and flange portions 51b and 51b that widen outward from both sides in the width direction of the groove portion 51a. Bolt holes 51c (see FIG. 5) through which bolts B3 for fixing the gutter material 51 to the frame receiving material 32 are inserted are formed in the flange portion 51b. The lower side of the bolt B3 is inserted into the bolt hole 32f (see FIG. 3) of the frame receiving member 32, the nut N3 is screwed from the lower side, the upper side is inserted into the bolt hole 51c of the gutter member 51, and the nut from the upper side. N3 is screwed. Two bolts B3 are provided on both sides of the groove portion 51a in the width direction at predetermined intervals in the longitudinal direction, and are arranged on both sides of the reinforcing frame 30 in the width direction.

  In the upper part of the groove 51a of the gutter material 51, draining portions 51d extending inward of the groove are formed on the wall surfaces on both sides in the width direction. The jacket material 50 is fixed by a rivet 52 so as to cover the draining portion 51 d, and a joiner material 53 that covers the groove 51 a is provided on the upper portion of the jacket material 50. The joiner material 53 is a rivet 52 that fixes the jacket material 50, and is integrally fixed to the draining portion 51 d and the jacket material 50. Here, even if rainwater or the like enters inside the gap between the jacket material 50 and the joiner material 53, the rainwater or the like flows into the groove 51 a and is appropriately drained into a trough or the like (not shown).

  When the gutter material 51 intersects the reinforcing frame 30 at a portion where the nodal member 20 is not present, the gutter material 51 is fixed to the reinforcing frame 30 using a U-shaped bolt B6 (see FIGS. 9 and 10) described later. Will be.

  Next, the operation of the dome structure 1 having the above configuration will be described.

  According to the dome structure 1, the ring-shaped reinforcing member 31 formed by connecting the reinforcing frame 30 in a ring shape is provided on the upper surface of the lattice dome structure 2, so that an out-of-plane load applied to the dome is ringed together with the lattice dome structure 2. The in-plane force (as an axial force between each frame constituting the lattice dome structure 2 and the ring-shaped reinforcing member 31) can be efficiently dispersed by the cylindrical reinforcing member 31. Thereby, the size of the lattice material 10 and the node member 20 can be reduced. Furthermore, since the stress applied to the tension ring (not shown) formed at the lowermost end of the lattice dome structure 2 can be reduced, the size of the tension ring can be reduced.

  In particular, according to the present invention, since the ring-shaped reinforcing member 31 is formed in a plurality of stages on the upper surface of the lattice dome structure 2, the ring-shaped reinforcing member 31 is used to fix the jacket material 50. The material 51 can be fixed. That is, since the ring-shaped reinforcing member 31 also serves as a support frame (main building) that supports the jacket material 50, there is no need to provide a support frame only for supporting the jacket material, and the entire structure of the dome structure 1. The proportion of the material can be increased, and the member can be effectively used structurally. Accordingly, since the ring-shaped reinforcing member 31 can be configured by a member having a weight substantially equal to that of the conventional support frame and the horizontal effect can be dispersed, the size of the lattice material 10, the node member 20, and the tension ring can be reduced. , The corresponding weight reduction can be achieved, and the manufacturing cost can be reduced.

  Further, the ring-shaped reinforcing member 31 has a structure in which the reinforcing frames 30 are rigidly joined to each other, so that it can sufficiently resist the tensile force applied to the reinforcing frame 30 by the horizontal reaction force generated by the out-of-plane load. . Furthermore, since the ring-shaped reinforcing member 31 is formed in a polygonal shape and its bent portion is fixed to the node member 20, the reinforcing frame 30 between the adjacent node members 20, 20 is linear. Therefore, even if a force such as blowing is applied to the dome structure 1 and a compressive force is applied to the reinforcing frame 30, it is difficult to buckle.

  Since each reinforcing frame 30 of the ring-shaped reinforcing member 31 is partially inserted into the groove 32a of the frame receiving member 32 and fixed by the frame pressing member 33, the reinforcing frame 32 is the inner peripheral surface of the groove 32a. Will be locked. Therefore, the stress that the node member 20 tends to spread radially outward by the load of the lattice dome structure 2 can be reliably transmitted to the ring-shaped reinforcing member 31, and effective reinforcement can be performed.

  FIG. 8A is a side view showing another form of joining state of the reinforcing frames, FIG. 8B is a sectional view taken along the line DD of FIG. 8A, and FIG. 8C is an exploded perspective view.

  As shown in FIG. 8, a circular plate 40 that closes the opening having a circular cross section is fixed to the end of the reinforcing frame 30 by welding. A joint plate 45 having an L-shaped cross section is fixed to the surface of the circular plate 40 by welding. The joint plate 45 is disposed so as to extend along the axial direction of the reinforcing frame 30. The joint plate 45 is fixed to one of the fan-shaped regions (for example, the upper right in FIG. 8B) that is radially divided into four at equal angular pitches from the center of the circular plate 40 and has an L-shaped cross section. The protruding corner portion is arranged so as to be positioned at the center of the circular plate 40. The joint plate 45 ′ adjacent to the joint plate 45 is arranged at a point-symmetrical position (lower left in FIG. 8B) with respect to the center of the circular plate 40. Bolt holes 45b are formed in the joint plates 45 and 45 ', respectively. A plurality of bolt holes 45b are formed in each plate 45a at a predetermined interval along the axial direction of the reinforcing frame 30 (four in this embodiment).

  The joint plates 45 and 45 ′ at the ends of the adjacent reinforcing frames 30 and 30 are abutted at the corners of the L-shaped section. Between the back surfaces 45c and 45c 'of the joint plates 45 and 45' adjacent to each other, an attachment plate 46 is provided so as to be bridged. The contact plate 46 has an L-shaped cross section equivalent to that of the joint plate 45, and is arranged so that the back surface 46b thereof abuts against the back surfaces 45c and 45c 'of the joint plates 45 and 45'. Bolt holes 46a are formed in the attachment plate 46 at positions corresponding to the bolt holes 45b of the joint plates 45 and 45 '. The bolts B4 are inserted into the bolt holes 45b, 46a of the joint plates 45, 45 'and the attachment plates 46, 46 that are in contact with each other, and the nuts N4 are screwed together to be tightened. Thus, the joint plates 45 and 45 'are fixed to each other. In this way, since the attachment plates 46 are attached and fixed in both the horizontal direction and the vertical direction using the joint plates 45, 45 ′ having an L-shaped cross section, the adjacent reinforcing frames 30, 30 are It can be rigidly connected in a coaxial state.

  Even with such a configuration, it is possible to obtain the same effects as those of the above-described embodiment.

  The connection structure between the end portions of the reinforcing frame 30 is not limited to the above-described embodiment, and the design can be changed as appropriate as long as the reinforcing frames 30 can be rigidly connected to each other and do not depart from the gist of the present invention. Is possible. For example, instead of bolt joining, other joining methods such as welding may be employed.

  9 is a side view showing another embodiment of the joined state between the node member and the reinforcing frame, FIG. 10 is a sectional view taken along line EE of FIG. 9, and FIG. 11 is another joined state between the node member and the reinforcing frame. It is the perspective view which showed the form.

  As shown in FIGS. 9 to 11, in this embodiment, the reinforcing frame 30 is made of a pipe material formed in a straight line, and both ends of the reinforcing frame 30 are fixed by adjacent node members 20. In the node member 20, the adjacent reinforcement frames 30, 30 are fixed so as to be bent at a predetermined angle.

  A joining member 35 for joining the reinforcing frames 30 to each other is fixed to the upper part of the node member 20. The joining member 35 is cut out from an extruded shape made of aluminum alloy. The joining member 35 includes a bolt hollow portion 35a connected to the node member 20, and a joining plate 35b extending upward from the upper surface of the bolt hollow portion 35a. A bolt hole 35c is formed in the lower surface of the bolt hollow portion 35a, and a nut N1 is fixed to the upper portion thereof. The nut N1 is inserted into the bolt hollow portion 35a and is fixed by a tool inserted from the small end of the bolt hollow portion 35a when the nut N1 is tightened.

  The joining plate 35 b is formed to extend in the radial direction of the lattice dome structure 2. That is, the joining plate 35b is formed along a surface that bisects the bending angle formed by the adjacent reinforcing frames 30 and 30. A plurality of bolt holes 35d (see FIG. 11) are formed in the joining plate 35b.

  An end plate 36 that is in contact with the joining plate 35b is fixed to the end portion of the reinforcing frame 30 by welding all around. A bolt hole 36a (see FIG. 11) is formed in the end plate 36 at a position corresponding to the bolt hole 35d of the joining plate 35b. The end portion of the reinforcing frame 30 is cut obliquely, and the end plate 36 is joined to the axial direction of the reinforcing frame 30 so as to form a half angle of the bending angle formed by the reinforcing frames 30, 30. Yes. Therefore, the adjacent reinforcement frames 30 and 30 are joined at a predetermined angle by bringing the end plate 36 at the end of the reinforcement frame 30 into contact with both surfaces of the joining plate 35b. The joining plate 35 b is formed with a smaller area than the end plate 36 and abuts on the lower half of the end plate 36. Bolt holes 36 a are also formed in the upper half of the end plate 36. A spacer 37 having a thickness equivalent to that of the joining plate 35b is provided at a position corresponding to the bolt hole 36a located in the upper half of the end plate 36 above the joining plate 35b. The spacer 37 is also formed with a bolt hole 37 a equivalent to the bolt hole 36 a of the end plate 36. In short, the reinforcing frames 30 and 30 are joined to each other by sandwiching the joining plate 35b and the spacers 37 and 37 between the end plates 36 and 36 of the adjacent reinforcing frames 30 and 30 and tightening the bolts B5 and nuts N5. . Thus, by providing the spacer 37 in the upper part of the joining plate 35b, it can be firmly tightened with the bolt B5 and the nut N5, and the reinforcing frames 30 and 30 are securely joined without shaking.

  As shown in FIGS. 9 and 10, a gutter material 51 is provided on the upper portion of the reinforcing frame 30. Since this gutter material 51 has the same configuration as that of the gutter material 51 shown in FIGS. 4 and 5, the same reference numerals are given and description thereof is omitted. In the present embodiment, the gutter material 51 is configured to be directly fixed to the reinforcing frame 30. Both ends of a U-shaped bolt B6 curved in a U-shape are inserted into a pair of bolt holes 51c, 51c (see FIG. 10) formed at predetermined intervals in the longitudinal direction of the gutter material 51, and the nut N6 is inserted. It is screwed. By screwing the nut N <b> 6, the U-shaped bolt B <b> 6 moves to the gutter material 51 side and sandwiches the reinforcement frame 30, so that the gutter material 51 is fixed to the reinforcement frame 30. The radius of curvature of the U-shaped bolt B <b> 6 is formed to be equal to the radius of curvature of the outer peripheral surface of the reinforcing frame 30. The bolt holes 51c and 51c are formed in the flange portions 51b on both sides, and two U-bolts B6 are used for one joint portion.

  Even with such a configuration, the ring-shaped reinforcing member 31 is formed in a polygonal shape by rigidly joining the plurality of reinforcing frames 30 to each other, so that the same operational effects as the above-described operational effects can be obtained.

  Although the best mode for carrying out the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately changed in design without departing from the spirit of the present invention. For example, in the above-described embodiment, the reinforcing frame 30 is formed in a pipe shape with a circular cross section, but is not limited thereto, and may be a square pipe with a rectangular cross section. According to this, it becomes possible to fix the gutter material directly to the surface of the square pipe. Further, the material of the reinforcing frame 30 is not limited to aluminum or aluminum alloy, and may be other members or alloys such as steel, stainless steel and titanium, or wood as long as it has a required strength. Good. Moreover, the material which is easy to process is preferable.

It is the side view which showed the best form for implementing the dome structure which concerns on this invention. (A) is the whole top view which showed the best form for implementing the dome structure which concerns on this invention, (b) is the top view which showed the reinforcement frame. It is the perspective view which showed the joining state of a nodal member and a reinforcement frame. (A) is the side view which showed the joining state of a node member and a reinforcement frame, (b) is the top view. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. (A) is the side view which showed the joining state of reinforcement frames, (b) is CC sectional view taken on the line of (a), (c) is an exploded perspective view. (A) is the side view which showed the other form of the joining state of reinforcement frames, (b) is CC sectional view taken on the line of (a), (c) is a disassembled perspective view. It is the side view which showed the other form of the joining state of a node member and a reinforcement frame. It is the EE sectional view taken on the line of FIG. It is the perspective view which showed the other form of the joining state of a node member and a reinforcement frame. It is the top view which showed the conventional dome structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dome structure 2 Lattice dome structure 10 Lattice material 20 Node member 30 Reinforcement frame 31 Ring-shaped reinforcement member 50 Jacket | cover material

Claims (3)

A lattice dome structure formed of a plurality of lattice members and node members, and a reinforcing frame,
The reinforcing frame is joined in a ring shape to a plurality of node members arranged on the same contour line on the dome surface of the lattice dome structure and concentrically, thereby forming a ring-shaped reinforcing member. Dome structure. The dome structure according to claim 1, wherein the ring-shaped reinforcing member is formed by rigidly joining a plurality of the reinforcing frames to each other, and is formed in a polygonal shape. The ring-shaped reinforcing member is joined to the outside of the lattice dome structure,
The dome structure according to claim 1 or 2, wherein a covering material of the dome is supported by the ring-shaped reinforcing member.

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