JPH06212728A - Opening and closing roof structure - Google Patents

Abstract

PURPOSE:To lighten a movable shed structure body by forming a shed arranged at least on the lowest stage of a pair of right and left divided roof structure bodies in a string beam structure where a cable is used as a lower chord, and upward bending deformation is given to a top chord. CONSTITUTION:The movable shed structure body 1 of an opening and closing type roof structure is provided with a pair of right and left divided roof structure bodies 6, which are composed of a lower stage shed 7 and an upper stage shed 8. The shed 7 applies a space truss structure beam 9 as main component, and has a top chord 10, whose lower face is provided with a plurality of string beam sections 11, and the adjacent string beam sections 11 are connected by a connecting member 12. Next, the beam section is formed in a string beam structure where the upper end of a plurality of compression members 13 is joined to the member 10, and a cable 14 is stretched from one end of the member 10 to its other end through the lower end of the member 13, and tensile force is given to the cable 14 to give upward bending deformation to the member 10. Thus a rational equilibrium system using the cable 14 can be obtained to lighten the structure body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable roof structure used for a stadium structure, which is a large-scale facility such as a baseball field or a sports field.

[0002]

2. Description of the Related Art It has been common that large-scale competition facilities such as baseball fields and sports fields are not provided with roofs, but in recent years, facilities that can be used regardless of the weather have been desired. , A roof of air film structure was used in which a glass fiber woven fabric was coated with a resin containing tetrafluoroethylene resin (Teflon resin) as a main component as a roof material, and this was inflated by air pressure. The facility is in practical use.

However, in a facility having an air film structure roof, a competition that should originally be performed in a natural environment is performed indoors, which not only spoils the taste, but also costs the power to pressurize the facility. However, the structure of the opening is complicated in order to maintain the airtightness in the facility. Therefore, in recent years, various types of materials that have rigidity and can be opened and closed as needed are provided. Roof structures have been proposed.

As a conventional roof structure of this type, there is one disclosed in Japanese Patent Application Laid-Open No. 3-2439. The disclosed technology includes an annular space truss 30 as shown in FIG. 7, and the space truss 30 has an outer peripheral edge formed by a pillar or an outer wall 32 that is erected on the outer peripheral portion of a baseball field 31 or the like. The club is supported and covers this baseball field 31.

The space truss 30 is constructed by an outer shell member 33, an upper chord member 34, a lower chord member 35, and a lattice member 36 each made of a steel frame material, and the lower end portion of the outer shell member 33 is the upper end of a pillar or outer wall 32. It is adapted to be supported by the column or outer wall 32 by being supported by rollers.

An opening 37 is formed in the center of the space truss 30, and a roof structure 38 for opening and closing the opening 37 is provided on the upper surface of the space truss 30. And this roof 38 is a movable roof 38 with a pair of half-domes.
a movable roof 38a,
38b moves from the state where the opening 37 is closed as shown by the solid line to the position shown by the phantom line to open the opening 37.

[0007]

However, the roof structure 38 in the above conventional stadium structure is not a structure in which a plurality of sheds are stacked, but movable roofs 38a, 3a.
8b is a single piece, and the span is large, the weight is large, the roof structure is large and heavy, and the construction cost of the structure is huge. If that was a big problem.

There is also a moving shed of a type in which a plurality of sheds are piled up and horizontally moved, but in this moving shed, the beam formation becomes higher as the span (span) becomes larger, The weight also increases. For this reason, the structure that supports the moving shed has become large-scaled and has become heavy, and the construction cost of the structure has become huge.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to reduce the weight of a moving roof structure. It is to solve major problems in constructing a large stadium structure, such as avoiding the large scale and heavy weight of the roof structure that supports the construction, enormous construction cost of the structure, and the like.

[0010]

In order to achieve the above-mentioned object, the present invention relates to an opening at the top of a roof structure by stacking a plurality of sheds so that they can move horizontally and moving the sheds. In the openable roof structure of the stadium structure that opens and closes, at least the shed that is arranged at the lowermost stage uses a cable for the lower chord member and applies tensile force to the cable to give upward bending deformation to the upper chord member It is characterized by a stringed beam structure.

[0011]

With this structure, at least the lowermost shed has a stringed beam structure, and the shed that overlies the upper shelves is also supported. The weight of the entire structure can be reduced. Therefore, the roof structure that supports this moving shed structure will not be upscaled and heavier, and the big problems in constructing a large stadium structure such as enormous construction cost of the structure will be solved. be able to.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the retractable roof structure according to the present invention, FIG. 2 is a plan view of the retractable roof structure, FIG. 3 is a front view of the retractable roof structure, and FIG. 4 is the retractable roof structure. FIG.

The movable roof structure 1 having a retractable roof structure according to the present invention is provided at the top of the roof structure 2 and opens and closes an opening 3 provided at the top.

That is, the gantry 4 is installed at the left and right portions (with the longitudinal direction of the opening 3 as the left-right direction) sandwiching the opening 3 of the roof structure 2. A rail 5 is provided along the rail.

The moving roof structure 1 is provided with a pair of left and right split roof structures 6, and these split roof structures 6 are provided.
Is composed of a lower shed 7 and an upper shed 8, respectively.

The lower shed 7 has a stringed beam structure. That is, as shown in FIGS. 3 and 4, this lower shed 7 has, as a main constituent member, a beam 9 having a mountain-shaped three-dimensional truss structure that inclines downward from the central portion toward both end sides. Upper chord member (roof member) constructed by using sub beams, ridge connecting beams and beam beams (all not shown)
The upper chord member 10 is provided with a plurality of tension beam members 11 on the lower surface of the upper chord member 10 at predetermined intervals in the left-right direction, and adjacent tension beam members 11 are connected to each other by a connecting member 12.

These stringed beam portions 11 are joined to the upper chord member 10 by connecting the upper end portions of a plurality of compression members 13 whose length gradually decreases from the central portion of the upper chord member 10 toward both ends. The cable 14 is stretched from one end to the other end of the upper chord member 10 via the lower end of the compression member 13. The end of the cable 14 is the upper chord member 1
Pins are connected to the center of both ends of 0.

In this lower shed 7, the cable 1
A rational balance system using 4 is obtained, and the overall weight is lighter than that of a steel structure roof.

The lower shed 7 thus constructed has a plurality of wheels (not shown) at its lower portion, and a rail 15 extending in the left-right direction is provided on the upper surface of the lower shed 7. It is laid in the lateral direction at a predetermined interval. The lower shed 7 is arranged so that the wheels can be placed on the rails 5 and moved to the gantry 4.

The upper shed 8 of the shed 7 has, as a main constituent member, a beam 16 having a mountain-shaped three-dimensional truss structure which inclines downward from the central portion toward both end sides. An upper chord member (roof member) 10 'assembled by using beam beams (not shown) is provided, and a string string beam portion 18 is formed at the inner end of the roof 8. Like the above-mentioned tension string beam portion 11, this tension string beam portion 18 has the upper end portions of the plurality of compression members 13 ′ whose length gradually decreases from the central portion of the upper chord member 10 ′ toward both ends to the upper chord member 10 ′. The cable 14 'is connected and stretched from one end of the upper chord member 17 through the lower end of the compression member 13' to the other end of the upper chord member 10 '. The ends of the cable 14 'are pin-connected to both ends of the upper chord member 10'. A plurality of wheels (not shown) are provided on the lower surface of the shed 8. In addition, a moving drive device (not shown) for moving is installed in the upper and lower sheds 7, 8.

The upper shed 8 is placed on the lower shed 7 with wheels mounted on the rails 15, and the upper and left shed 8 on the left and right have a stringed beam portion 18 at the inner end thereof. They are facing each other. Then, like the lower shed 7, it is arranged so that it can be moved to the gantry 4.

The following operation will be described.

By the operation of the moving drive device, the left and right lower sheds 7 move inward on the rails 5 and stop, and then the upper shed 8 moves inwardly on the rails 15. By moving and contacting the inner ends of the upper sheds 8 with each other, the opening 3 is closed by the upper and lower sheds 7, 8.

By the reverse operation of the moving drive device, the left and right upper shelves 8 move outward on the rails 15 and are stacked on the lower shed 7, and then the lower shed. The upper shed 8 as well as the shed 7 moves outward on the rail 5 to open the opening 3.

The lower shed 7 has a plurality of tension beam portions 11 on the lower surface of the upper chord member 10 at predetermined intervals in the left-right direction.
And a stringed beam structure in which adjacent stringed beam portions 11 are connected to each other by a connecting member 12, a rational balance system is provided, and moreover, the entire structure is lighter than a roof having a steel frame structure. Therefore, the weight of the moving roof structure 1 can be reduced. Therefore, the roof structure 2 supporting the moving roof structure 1 is prevented from increasing in size and weight.

In addition, as described above, the tension beam portion 11 of the lower shed 7 has the upper end portions of the plurality of compression members 13 whose length gradually decreases from the central portion of the upper chord member 10 toward both ends. And a cable 14 is stretched from one end portion of the upper chord member 10 to the other end portion of the upper chord member 10 through the lower end portion of the compression member 13, and the lower end portions of the plurality of compression members 13 are aligned to form a straight line. However, the present invention is not limited to this, but the lower ends of the plurality of compression members 13 are not aligned as shown in FIG. The compression members 13 are shortened, and the cable 1 is attached to the lower ends of these compression members 13.
When the cable 4 is stretched, the cable 14 may be stepped so that a larger tension is generated in the cable 14.

As described above, the split roof structure 6 of the movable shed structure 1 has a two-tiered structure consisting of the lower shed 7 and the upper shed 8. The lower shed 7 And one or more intermediate sheds are provided between the upper shed and the upper shed 8, and when the opening 3 is opened, the intermediate shed and the upper shed 8 are superposed on the lower shed 7, When closing the opening 3, the middle shed may be moved inward on the lower shed 7, and the upper shed 8 may be moved inward on the middle shed.

[0029]

As described above, according to the present invention, a plurality of horizontally movable shelves are superposed, and at least the shed arranged at the lowermost stage uses a cable for the lower chord member and pulls the cable to the cable. Since the string beam structure is applied to apply the force to the upper chord member to bend it upwards, at least the lowermost shed is a string beam structure, and also supports the shed that overlaps the upper part. Since the weight of the moving roof structure is lighter than that of the steel structure roof, it is possible to reduce the weight of the entire movable shed structure. Therefore, it is possible to avoid the large scale and heavy weight of the roof structure that supports the moving roof structure, and to solve the major problems in constructing a large stadium structure such as the huge construction cost of the structure. You can

[Brief description of drawings]

FIG. 1 is a perspective view of a retractable roof structure according to the present invention.

FIG. 2 is a plan view of the openable roof structure.

FIG. 3 is a front view of the openable roof structure.

FIG. 4 is a sectional view taken along the line XX in FIG.

FIG. 5 is a front view of the upper shed of the retractable roof structure according to the present invention.

FIG. 6 is a front view of another embodiment of the upper shed of the opening / closing roof structure.

FIG. 7 is a vertical cross-sectional view of a roof structure in a conventional stadium structure.

[Explanation of symbols]

 1 Moving Shed Structure 2 Roof Structure 7 Lower Shed 8 Upper Shed 10 Upper Chord Member 13 Compression Member 14 Cable

Claims (1)

[Claims] 1. In an openable roof structure in which a plurality of sheds are superposed so as to be horizontally movable and the shed is moved to open and close an opening at an upper portion of the roof structure, at least the uppermost shelves are arranged. An openable roof structure characterized in that the roof has a string beam structure in which a cable is used for the lower chord member and a tensile force is applied to the cable to bend and bend the upper chord member to the upper chord member.