JP6591110B1 - Roof and structure - Google Patents

Abstract

An object of the present invention is to reduce a burden on a lower structure while providing a rise of a roof. A roof 11 is a roof 11 formed by a truss structure, and has an outer peripheral member 51 formed in an annular shape in a plan view, and extends in a first direction X in a plan view and spans the outer peripheral member 51. The first material 52, the second material 53 extending in the second direction Y intersecting the first direction X in plan view, and spanning the outer peripheral material 51 while intersecting the first material 52, and the second material 53 in plan view. A reinforcing material 54 extending in a direction intersecting the first direction X and the second direction Y and spanning the outer peripheral material 51 while intersecting the first material 52 and the second material 53. [Selection] Figure 2

Description

  The present invention relates to roofs and structures.

  2. Description of the Related Art Conventionally, a roof formed by a truss as described in, for example, Patent Documents 1 and 2 below is known.

JP 2000-170308 A Japanese Patent Laid-Open No. 9-111943

  However, the conventional roof has room for improvement in reducing the burden on the lower structure supporting the roof while providing the rise of the roof.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to reduce the burden on the lower structure while providing a rise of the roof.

In order to solve the above problems, the present invention proposes the following means.
The roof according to the present invention is a roof formed by a truss structure, and is an outer peripheral member formed in an annular shape in plan view, and a first extending in the first direction and spanning the outer peripheral member in the plan view. A material, a second material extending in a second direction intersecting the first direction in the plan view, and spanning the outer peripheral material while intersecting the first material, and the first direction in the plan view and A reinforcing material extending in a direction crossing the second direction and extending over the outer peripheral material while crossing the first material and the second material, and the axial rigidity of the reinforcing material is the first material It is higher than the axial rigidity of the material and the axial rigidity of the second material .

For example, when a rise is provided on the roof for the purpose of satisfying design requirements (such as the effective height of the indoor space under the roof) and legal conditions (such as a water gradient), each of the first material and the second material, Thrust force corresponding to the rise is generated. When this thrust force is borne by the lower structure supporting the roof, the first material and the second material are, for example, pin-joined to the lower structure, and the lower structure is utilized by utilizing the arch effect of the first material and the second material. The thrust force.
For example, when the distance in the first direction or the distance in the second direction on the outer peripheral material is large (in the case of a so-called large span structure), the thrust force described above becomes large. In this case, if the thrust force is borne by the lower structure, it is necessary to increase the strength of the lower structure. As a result, for example, there is a problem in that the pillars of the pillars in the lower structure become large and the indoor space under the roof becomes narrow (if the pillar size is restricted due to the design plan, the restriction cannot be observed).
Therefore, a structure that reduces the burden on the lower structure of the thrust force generated in the first material and the second material is desired. For example, the thrust force transmitted to the lower structure can be reduced by forming a part of the support portion between the roof and the column with a roller structure.
In this roof, the reinforcing material extends in a direction intersecting the first direction and the second direction in a plan view, and spans the outer peripheral material while intersecting the first material and the second material. Therefore, the thrust force generated in the first material and the second material can be transmitted to the reinforcing material, and at least a part of these thrust forces can be borne by the reinforcing material. In other words, the bending moment can be converted into an axial force, and this axial force can be balanced in the roof (self). Thereby, for example, the thrust force and horizontal displacement of the first material and the second material borne by the lower structure can be suppressed, and the degree of freedom in designing the lower structure can be increased. Furthermore, for example, it becomes possible to expect an arch effect due to the reinforcing material, and it is possible to reduce the cost of the roof by eliminating the excessive strength of the members applied to the outer peripheral material, the first material, and the second material. it can.

  Since the axial stiffness of the reinforcing material is higher than the axial stiffness of the first material and the axial stiffness of the second material, it is possible to more effectively suppress deformation of the reinforcing material when an axial force acts on the reinforcing material. be able to. Thereby, the magnitude | size of the thrust force which a reinforcing material can bear can be raised effectively, and the horizontal displacement of a roof can be suppressed more effectively.

  The reinforcing material may be formed in a polygonal shape inscribed in the outer peripheral material in the plan view.

  The reinforcing material is formed in a polygonal shape inscribed in the outer peripheral material in plan view. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing member can be effectively increased.

  The reinforcing member forms a rectangular shape including two first corner portions that are convex in the first direction and two second corner portions that are convex in the second direction in the plan view. May be.

  The reinforcing material forms the aforementioned rectangular shape in plan view. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing material can be increased more effectively.

  In the second corner, two sides forming the second corner may be separated in the first direction.

  In the second corner, the two sides forming the second corner are separated in the first direction. Therefore, the freedom degree of the design of a reinforcing material can be raised.

  The outer peripheral member is formed in a polygonal shape having a plurality of side portions and a plurality of corner portions in the plan view, and the reinforcing member is bridged between the two side portions adjacent to each other across the one corner portion. May be passed.

  The reinforcing material is bridged between two side portions adjacent to each other across one corner portion. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing member can be effectively increased.

  The outer peripheral member is formed in a rectangular shape in the plan view, and the plurality of side portions include two first side portions extending in the first direction, and two second side portions extending in the second direction, The reinforcing member may be bridged between the first side and the second side that are adjacent to each other with one corner interposed therebetween.

  The reinforcing material is bridged between the first side and the second side that are adjacent to each other across one corner. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing material can be increased more effectively.

  The reinforcing material may be provided for all sets of the two side portions adjacent to each other with one corner portion interposed therebetween.

  The reinforcing material is provided for all sets of two side portions adjacent to each other across one corner portion. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing material can be increased more effectively.

  The first material, the second material, and the reinforcing material may be formed in an arc shape that protrudes upward.

  The first material, the second material, and the reinforcing material are formed in an arc shape that protrudes upward, and a rise is provided on the roof. Accordingly, the thrust force described above is generated in the first material and the second material. Therefore, the effect by the reinforcing material can be remarkably achieved.

  It is preferable that the reinforcing material extends linearly in the plan view.

  When the reinforcing material extends in a straight line in plan view, the reinforcing material can be processed by two-dimensional simple bending instead of three-dimensional bending, so processing is easy and production costs can be greatly reduced. is there.

  The reinforcing member may include a rigid body that is formed in an arc shape that protrudes upward and is continuously stretched between two different points on the outer peripheral member. In addition, that the rigid body is continuously bridged between two different points on the outer peripheral member means that one continuous rigid body is bridged between two different points on the outer peripheral member. One continuous rigid body includes a configuration in which a plurality of rigid bodies are integrated through welding. For example, as a continuous rigid body, it is also possible to adopt a shape steel in which one is continuously extruded, and a plurality of separately extruded shapes are integrally formed through welding. It is also possible to employ joined steel shapes.

  Since the reinforcing material is a rigid body continuously spanned, it is possible to reduce the bending process of the reinforcing material and reduce the manufacturing cost.

A plurality of upper chord materials comprising the outer peripheral material, the first material, the second material and the reinforcing material; and a plurality of lower chord materials comprising the outer peripheral material, the first material, the second material and the reinforcing material; An oblique member that connects the plurality of upper chord members and the plurality of lower chord members may be provided.

A plurality of upper chord member and a plurality of lower chord members are each outer peripheral member, a first member, a second member and reinforcing member, respectively. Therefore, the reinforcing material of the upper chord material bears the compressive force, and the reinforcing material of the lower chord material bears the tensile force, so that the thrust force generated in the first material and the second material can be borne by the reinforcing material.
A diagonal member connects a plurality of upper chord members and a plurality of lower chord members. Therefore, by increasing the depth, which is the distance between the plurality of upper chord members and the plurality of lower chord members, for example, the bending moment can be converted into an axial force to make it easier to receive.

  The structure according to the present invention includes the roof and a lower structure that supports the roof.

  Since the roof employs the above-described configuration, for example, it is possible to increase the degree of freedom in designing the lower structure and to realize cost reduction.

  You may further provide the roller bearing arrange | positioned between the said roof and the said lower structure.

  A roller bearing is disposed between the roof and the substructure. Therefore, the substructure basically does not bear the thrust force of the roof. Therefore, the effect of being able to suppress the thrust force of each of the first material and the second material borne by the lower structure as described above is remarkably achieved.

  ADVANTAGE OF THE INVENTION According to this invention, the burden with respect to a lower structure can be reduced, providing the rise of a roof.

It is a perspective view of the roof which constitutes the structure concerning one embodiment of the present invention. It is an expansion perspective view of the principal part of the roof shown in FIG. It is a side surface of the reinforcing material which comprises the roof shown in FIG. It is an expansion perspective view of the principal part of the reinforcing material shown in FIG. It is a top view of the roof which constitutes the structure concerning the 1st modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 2nd modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 3rd modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 4th modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 5th modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 6th modification of the present invention.

Hereinafter, a structure 10 (building) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIGS. 1 to 4, the structure 10 includes a roof 11, a lower structure 12 that supports the roof 11, and a roller support 13 that is disposed between the roof 11 and the lower structure 12. Yes.
The roof 11 is formed in a rectangular shape in a plan view viewed from the vertical direction Z. Hereinafter, the longitudinal direction of the rectangular shape is referred to as a digit direction X (first direction), and the short direction is referred to as a spanning direction Y (second direction).

  The roof 11 is formed by a truss structure. In the present embodiment, the roof 11 is formed by a three-dimensional truss structure. In the illustrated example, the roof 11 has a double layer structure (multilayer structure) having a plurality of upper chord members 21, a plurality of lower chord members 31, and a plurality of diagonal members 41. Hereinafter, an assembly of a plurality of upper chord members 21 is referred to as an upper chord member 20, and an assembly of a plurality of lower chord members 31 is referred to as a lower chord member 30.

  The upper chord body 20 and the lower chord body 30 are each formed in a planar shape. In other words, the plurality of upper chord members 21 and the plurality of lower chord members 31 (plural string members) are arranged on the same plane. The plurality of upper chord members 21 and the plurality of lower chord members 31 are arranged on the same spherical surface that protrudes upward. In other words, the roof 11 is provided with a rise. The rise is provided, for example, in order to satisfy the internal effective height, water gradient, and the like according to the design and the legal conditions.

The upper chord body 20 includes a plurality of upper chord members 21, an outer peripheral member 51, a first member 52, a second member 53, and a reinforcing member 54. The outer peripheral material 51 is formed in a linear shape. The 1st material 52, the 2nd material 53, and the reinforcing material 54 are formed in the circular arc shape which becomes convex upwards.
The outer peripheral material 51 is formed in an annular shape in plan view. The outer peripheral member 51 is formed in a polygonal shape having a plurality of side portions 55 and a plurality of corner portions 56 in plan view. In the illustrated example, the outer peripheral member 51 is formed in a rectangular shape in plan view. The plurality of side portions 55 include two first side portions 55a extending in the column direction X and two second side portions 55b extending in the spanning direction Y.

The first material 52 extends in the column direction X in plan view. The first material 52 is parallel to the first side 55a in plan view. The first material 52 is stretched over the outer peripheral material 51. A plurality of the first materials 52 are arranged at intervals in the spanning direction Y.
The second material 53 extends in the spanning direction Y in plan view. The second material 53 is parallel to the second side 55b in plan view. The second material 53 is stretched over the outer peripheral material 51 while intersecting the first material 52. A plurality of second materials 53 are arranged at intervals in the column direction X.

  As shown in FIG. 1, the reinforcing member 54 extends in a direction that intersects the crossing direction X and the spanning direction Y in plan view. The reinforcing material 54 is stretched over the outer peripheral material 51 while intersecting the first material 52 and the second material 53. The reinforcing material 54 divides the first material 52 and the first side portion 55a in the direction X of the beam. The reinforcing material 54 divides the second material 53 and the second side portion 55b in the spanning direction Y. In the outer peripheral member 51, the reinforcing member 54 is bridged between two side portions 55 (one between the first side portion 55a and the second side portion 55b) that are adjacent to each other with one corner portion 56 interposed therebetween.

  In the present embodiment, the reinforcing material 54 is provided for all sets of two side portions 55 that are adjacent to each other with one corner portion 56 interposed therebetween. As a result, the reinforcing material 54 (tension ring) is formed in a polygonal shape inscribed in the outer peripheral material 51 in plan view. The reinforcing member 54 includes two first corners 57 that are convex in the column direction X and two second corners 58 that are convex in the spanning direction Y in plan view. In the second corner portion 58, two side portions 59 forming the second corner portion 58 are separated in the column direction X. Thus, in the 2nd corner | angular part 58, the side parts 59 do not need to actually cross | intersect, but should just form the 2nd corner | angular part 58 substantially. The interval between the side portions 59 can be adjusted by the scale of the structure 10 (building), the member configuration of the roof 11 and the configuration of the members between the side portions 59.

As shown in FIG. 2, the reinforcing member 54 includes a main rigid body 60 (rigid body) and a sub-rigid body 61 (rigid body). The main rigid body 60 and the sub-rigid body 61 are formed in an arc shape that is convex upward.
The main rigid body 60 is continuously stretched between two different points on the outer peripheral member 51. A plurality (three in the illustrated example) of main rigid bodies 60 are provided at intervals on each side portion 59. Note that the main rigid body 60 is continuously spanned between two different points on the outer peripheral member 51, that one continuous main rigid body 60 is spanned between two different points on the outer peripheral member 51. Means. The single continuous main rigid body 60 includes a configuration in which a plurality of rigid bodies are integrated through welding. For example, as one continuous main rigid body 60, it is possible to adopt a shape steel in which one is continuously extruded, and a plurality of separately extruded shape steels are connected via welding. It is also possible to adopt a shape steel joined together.

  The sub-rigid body 61 connects adjacent main rigid bodies 60 to each other. The secondary rigid body 61 includes a first rigid body 62 and a second rigid body 63. The first rigid body 62 extends in the column direction X. The first rigid body 62 is bridged between the first material 52 and the first side portion 55a where the reinforcing material 54 is divided. The second rigid body 63 extends in the spanning direction Y. The second rigid body 63 is bridged between the second material 53 and the second side 55b where the reinforcing material 54 is divided.

  As shown in FIG. 4, each of the outer peripheral member 51, the first member 52, and the second member 53 includes a plurality of truss members and a joint member that connects adjacent truss members. The truss member is formed of, for example, a steel pipe (for example, φ88.9 to φ267). The joint member is formed in a spherical shape, for example. The outer peripheral member 51, the first member 52, and the second member 53 intersect at the joint member, respectively.

The reinforcing member 54 is made of, for example, a section steel (for example, an H-section steel, H350 wide). The reinforcing material 54 is formed, for example, by welding a plurality of shape steels. The axial rigidity of the reinforcing material 54 is higher than the axial rigidity of the outer peripheral material 51, the first material 52, and the second material 53. The compressive strength of the reinforcing material 54 (compressed strength of the shape steel) is higher than the compressive strength of the outer peripheral material 51, the first material 52 and the second material 53 (compressive strength of the steel pipe). The tensile strength of the reinforcing material 54 (tensile strength of the shape steel) is higher than the tensile strength of the outer peripheral material 51, the first material 52, and the second material 53 (tensile strength of the steel pipe).
The outer peripheral member 51, the first member 52, and the second member 53 are rigidly joined to the reinforcing member 54 by, for example, welding or high strength bolts. The form of joining is not limited to rigid joining, and may be semi-rigid joining or pin joining.

As shown in FIGS. 1 to 4, the lower chord body 30, like the upper chord body 20, includes a plurality of upper chord members 21, an outer peripheral member 51, a first member 52, a second member 53, and a reinforcing member 54. It is equipped with.
As shown in FIG. 1 and FIG. 2, the first material 52 of the lower chord body 30 is one more than the first material 52 of the upper chord body 20, and is a half span and a tension between the first material 52 of the upper chord body 20. It is shifted in the direction Y. The second material 53 of the lower chord body 30 is one more than the second material 53 of the upper chord body 20, and is shifted in the half-span and column direction X with respect to the second material 53 of the upper chord body 20.

The outer peripheral member 51 of the lower chord body 30 is larger than the outer peripheral member 51 of the upper chord body 20 in the direction X and the span direction Y. The outer peripheral material 51 of the lower chord body 30 is larger than the outer peripheral material 51 of the upper chord body 20 by one span of the second material 53 in the direction X of the beam. The outer peripheral material 51 of the lower chord body 30 is larger than the outer peripheral material 51 of the upper chord body 20 by one span of the first material 52 in the spanning direction Y.
The main rigid body 60 of the lower chord body 30 overlaps the main rigid body 60 of the upper chord body 20 in the vertical direction. The main rigid body 60 of the lower chord member 31 is disposed directly below the main rigid body 60 of the upper chord body 20.

As shown in FIGS. 2 to 4, the diagonal material 41 includes a first diagonal material 42 and a second diagonal material 43.
The first diagonal member 42 connects the outer peripheral member 51, the first member 52, and the second member 53 of the lower chord body 30, and the outer peripheral member 51, the first member 52, and the second member 53 of the upper chord member 20, respectively. At least one end of the diagonal member 41 includes an outer peripheral member 51, a first member 52, and a second member 53 of the lower chord member 30, and an outer peripheral member 51, a first member 52, and a second member 53 of the upper chord member 20. It is connected to one of the joints. The outer peripheral member 51, the first member 52 and the second member 53 of the lower chord member 30, the outer peripheral member 51, the first member 52 and the second member 53 of the upper chord member 20, and the first diagonal member 42 constitute a three-dimensional truss. is doing.

  The second diagonal member 43 connects the upper and lower main rigid bodies 60 to each other. The second diagonal member 43 is located immediately below the main rigid body 60 of the upper chord body 20 and directly above the main rigid body 60 of the lower chord body 30. The main rigid body 60 of the upper chord body 20, the main rigid body 60 of the lower chord body 30, and the second diagonal member 43 connecting these two main rigid bodies 60 form a plane truss.

As shown in FIGS. 1 to 3, the roof 11 further includes a secondary member 71. The secondary member 71 is a member for receiving (supporting) an outer wall provided around the roof 11. In other words, the secondary member 71 is not a structural member of the roof 11. The secondary member 71 is formed in an annular shape on the outer periphery of the roof 11. The secondary member 71 has a truss structure. The secondary member 71 is made of, for example, a shape steel.
As shown in FIG. 3, the lower structure 12 includes a plurality of pillars 12a. The roller support 13 is disposed between the column 12 a and the outer peripheral member 51 of the lower chord body 30.

By the way, for example, when a rise is provided on the roof 11 for the purpose of satisfying design requirements (such as an effective height of the indoor space under the roof 11) and legal conditions (such as a water gradient), the first material 52 and the first material 52 A thrust force corresponding to the rise is generated in each of the two materials 53. When this thrust force is borne by the lower structure 12 that supports the roof 11, the first material 52 and the second material 53 are pin-bonded to the lower structure 12, for example, and the arches of the first material 52 and the second material 53, respectively. The thrust force is borne by the lower structure 12 using the effect.
For example, when the distance in the direction X of the outer circumferential member 51 and the distance in the spanning direction Y are large (in the case of a so-called large span structure), the above-described thrust force becomes large. In this case, when the thrust force is borne by the lower structure 12, it is necessary to increase the strength of the lower structure 12. As a result, for example, the pillars of the pillars 12a in the lower structure 12 become large, and the indoor space under the roof 11 becomes narrow (if the size of the pillars 12a is restricted due to the design plan, the problem cannot be observed). Occurs.
Therefore, a structure that reduces the burden on the lower structure 12 due to the thrust force generated in the first material 52 and the second material 53 is desired.

  According to the roof 11 and the structure 10 according to the present embodiment, the reinforcing material 54 extends in a direction intersecting the crossing direction X and the spanning direction Y in plan view, and the first material 52 and the second material 53. It crosses over the outer periphery 51 while crossing. Therefore, the thrust force generated in the first material 52 and the second material 53 can be transmitted to the reinforcing material 54, and at least a part of these thrust forces can be borne by the reinforcing material 54. In other words, the bending moment can be converted into an axial force, and this axial force can be balanced within the roof 11 (self). Thereby, for example, the thrust force and horizontal displacement of the first material 52 and the second material 53 borne by the lower structure 12 can be suppressed, and the degree of freedom in designing the lower structure 12 can be increased. Further, for example, it becomes possible to expect an arch effect due to the reinforcing material 54, and it is possible to reduce the cost of the roof 11 by eliminating the excessive strength of the truss members applied to the outer peripheral material 51, the first material 52, and the second material 53. Can be realized.

The reinforcing material 54 is formed in a polygonal shape inscribed in the outer peripheral material 51 in plan view. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing member 54 can be effectively increased.
The reinforcing material 54 forms the aforementioned rectangular shape in plan view. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing material 54 can be increased more effectively.
In the second corner portion 58, the two side portions 55 forming the second corner portion 58 are separated in the column direction X. Therefore, the degree of freedom in designing the reinforcing material 54 can be increased.

The reinforcing material 54 is bridged between two side portions 55 adjacent to each other with one corner portion 56 interposed therebetween. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing member 54 can be effectively increased.
The reinforcing material 54 is bridged between the first side portion 55a and the second side portion 55b that are adjacent to each other with one corner portion 56 interposed therebetween. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing material 54 can be increased more effectively.
The reinforcing material 54 is provided for all sets of two side portions 55 adjacent to each other across one corner portion 56. Therefore, the magnitude of the thrust force that can be borne by the entire reinforcing material 54 can be increased more effectively.

The first material 52, the second material 53, and the reinforcing material 54 are formed in an arc shape that protrudes upward, and the roof 11 is provided with a rise. Therefore, the thrust force described above is generated in the first material 52 and the second material 53. Therefore, the effect by the reinforcing material 54 can be remarkably achieved.
The axial rigidity of the reinforcing material 54 is higher than the axial rigidity of the first material 52 and the axial rigidity of the second material 53. Therefore, the deformation of the reinforcing material 54 when the axial force acts on the reinforcing material 54 can be more effectively suppressed. Thereby, the magnitude | size of the thrust force which the reinforcing material 54 can bear can be raised effectively, and the horizontal displacement of the roof 11 can be suppressed more effectively.

The reinforcing material 54 extends linearly in plan view. Therefore, since the reinforcing material 54 can be processed by two-dimensional simple bending instead of three-dimensional bending, the processing is easy and the manufacturing cost can be significantly reduced.
Since the reinforcing material 54 is the main rigid body 60 continuously stretched, it is possible to reduce the bending process of the reinforcing material 54 and to reduce the manufacturing cost.

Each of the plurality of upper chord members 21 and the plurality of lower chord bodies 30 includes an outer peripheral member 51, a first member 52, a second member 53, and a reinforcing member 54, respectively. Therefore, the reinforcing material 54 of the upper chord member 21 bears a compressive force, and the reinforcing member 54 of the lower chord member 31 bears a tensile force, so that the thrust force generated in the first member 52 and the second member 53 is applied to the reinforcing member 54. Can be borne.
A diagonal member 41 connects a plurality of upper chord members 21 and a plurality of lower chord members 31. Therefore, by increasing the depth, which is the distance between the plurality of upper chord members 21 and the plurality of lower chord members 31, for example, the bending moment can be converted into an axial force to make it easier to receive.

  A roller bearing 13 is arranged between the roof 11 and the lower structure 12. Therefore, the lower structure 12 basically does not bear the thrust force of the roof 11. Therefore, the effect of being able to suppress the thrust forces of the first material 52 and the second material 53 borne by the lower structure 12 as described above is remarkably achieved.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The upper chord body 20 and the lower chord body 30 of the roof 11 are not limited to the configuration shown in the embodiment.
For example, each side 55 of the reinforcing material 54 may not include a plurality of main rigid bodies 60 but may include only one main rigid body 60.
In the second corner portion 58 of the reinforcing member 54, the two side portions 59 forming the second corner portion 58 are separated from each other in the row direction X, but the two side portions 59 are separated from each other in the row direction X. It does not have to be.

Like the roof 11 </ b> A according to the first modification shown in FIG. 5, the outer circumferential member 51 may be square instead of rectangular.
As in the roofs 11B, 11C, 11D, and 11E according to the second to fifth modifications shown in FIGS. 6 to 9, the outer peripheral member 51 has a hexagonal shape, octagonal shape, perfect circular shape, and elliptical shape in plan view. It may be.
As in the roof 11F according to the sixth modification shown in FIG. 10, the reinforcing material 54 may be formed in a triangular shape in plan view.

  The roof 11 may have a triple layer structure or a single layer structure.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Structure 11 Roof 12 Lower structure 13 Roller bearing 21 Upper chord material 31 Lower chord material 41 Diagonal material 51 Peripheral material 52 1st material 53 2nd material 54 Reinforcement material 55a 1st edge part 55b 2nd edge part 57 1st corner | angular part 58 Second corner 60 rigid body X Digit direction (first direction)
Y Zhang direction (second direction)

Claims (13)

A roof formed by a truss structure,
An outer peripheral material formed in an annular shape in plan view;
A first material extending in the first direction in the plan view and spanning the outer peripheral material;
A second material extending in a second direction intersecting the first direction in the plan view and spanning the outer peripheral material while intersecting the first material;
A reinforcing material extending in a direction intersecting the first direction and the second direction in the plan view, and spanning the outer peripheral material while intersecting the first material and the second material ,
The roof of the reinforcing member has a higher axial rigidity than the first member and the second member . The roof according to claim 1, wherein the reinforcing material is formed in a polygonal shape inscribed in the outer peripheral material in the plan view. The reinforcing member forms a rectangular shape including two first corner portions that are convex in the first direction and two second corner portions that are convex in the second direction in the plan view. The roof according to claim 2 . 4. The roof according to claim 3 , wherein at the second corner, two sides forming the second corner are separated in the first direction. The outer peripheral material is formed in a polygonal shape having a plurality of sides and a plurality of corners in the plan view,
The roof according to any one of claims 1 to 4 , wherein the reinforcing member is bridged between two side portions adjacent to each other with the one corner portion interposed therebetween. The outer peripheral material is formed in a rectangular shape in the plan view,
The plurality of sides include two first sides extending in the first direction and two second sides extending in the second direction,
The roof according to claim 5 , wherein the reinforcing member is bridged between the first side portion and the second side portion that are adjacent to each other across the one corner portion. The roof according to claim 5 or 6 , wherein the reinforcing material is provided for all sets of the two side portions adjacent to each other across one corner portion. The roof according to any one of claims 1 to 7 , wherein the first material, the second material, and the reinforcing material are formed in an arc shape protruding upward. The roof according to any one of claims 1 to 8 , wherein the reinforcing member extends linearly in the plan view. The reinforcing material is any one of claim 1, comprising a rigid bridged continuously between two different points in the outer peripheral member is formed into an arc shape projecting toward the upper side 8 The roof described in. A plurality of upper chord members comprising the outer peripheral member, the first member, the second member and the reinforcing member;
The peripheral member, the first member, and a plurality of lower chord member comprising the second material and the reinforcing material,
The roof according to any one of claims 1 to 10 , further comprising a diagonal member connecting the plurality of upper chord members and the plurality of lower chord members. The roof according to any one of claims 1 to 11 ,
And a lower structure that supports the roof. The structure according to claim 12 , further comprising a roller bearing disposed between the roof and the lower structure.