JPH09317251A - Supporting structure of auxiliary membrane of membrane structured roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fit a roof of membrane structure to a fixing part by fixing a base member to cover a membrane end supporting part in which a membrane end of the roof membrane is fixed to a part of a steel frame of a main house, and stretching an auxiliary membrane copying the shape of an upper surface of the base member. SOLUTION: A roof membrane 52 is fixed to a membrane end supporting part 50. A base spacer material 10 made of foamed plates is adhered to a flange 54b of a steel frame of a main house. A base foam material 11 is adhered to the base spacer material 10 so as to be laminated. Then, an edge part 20a of a flap membrane 20 is welded to a surface of the roof membrane in a stretching manner so as to cover an upper surface of the base foam material 11. A slender copper piece 25 is fitted to a conductor supporting strip 21. A supporting part of the auxiliary membrane which is inexpensive and excellent in heat insulation performance is easily assembled by a small number of parts to a fixing part of the roof membrane 52.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for an auxiliary membrane of a membrane structure roof, and more particularly to a support structure for an auxiliary membrane covering a fixed portion of a membrane structure stretched between roof steel frames as a roof material.

[0002]

2. Description of the Related Art Generally, in a large-scale membrane structure roof, a membrane material having a shape conforming to the opening shape is stretched so as to cover an opening portion partitioned by a erected roof steel frame. At this time, the edge portion of each membrane material (hereinafter referred to as a roof membrane) is fixed and fixed to a membrane edge supporting portion such as a purlin steel frame provided on the roof steel frame. FIG. 4 is a partial perspective view in which a part of a conventional membrane shell R having a cylindrical shell shape is cut away. As shown in the same figure, in the membrane structure roof R, a predetermined arch-shaped roof steel frame 51 is erected at a predetermined interval in the ridge direction. The roof membrane 52 is preliminarily cut into a width approximately equal to the span dimension B between the adjacent roof steel frames 51, wound in a roll shape and carried into the roof, and as shown by an arrow A in the figure, a strip shape. It is deployed between the roof steel frames 51 so as to form And the roof steel frame 51
The edge 52a (see FIG. 5) extending along the roof 5
It is adapted to be fixed to the first membrane end support portion 50.

FIGS. 5 and 6 show a membrane end support portion 50 of a roof steel frame 51 to which a roof membrane 52 is fixed. FIG. 5 is a partial cross-sectional perspective view showing an enlarged part of the membrane end support portion 50 of the roof steel frame 51 surrounded by a circle in FIG. 4, and FIG. 6 is a further enlarged view of the membrane end support portion 50. It is the partial expanded sectional view shown. As shown in FIGS. 4 to 6, at the upper end of the roof steel frame 51 made of a steel pipe pipe bent into a predetermined arch shape, a web lower end 54 of a purlin steel frame 54 made of CT steel is provided.
a is reinforced by a rib 53 (see FIG. 6) and welded. The edge portions 52a of the roof membrane 52 are fixedly supported on both ends of the flange 54b of the purlin steel frame 54 via fixing bolts 55 and pressing plates 56. At this time, a predetermined tension is introduced into each roof membrane 52 in the direction of the arrow C (stretching direction), and the roof membranes 52 are maintained in a predetermined suspended shape and stretched between the adjacent roof steel frames 51. Further, the membrane edge support portion 50 and the edge portion 52 a of the roof membrane 52 are covered with a flap membrane 57 extending along the roof steel frame 51. The edge 57a in the width direction of the flap film 57
Are welded to the surface of the roof membrane 52. Therefore, the membrane edge support portion 50 covered with the flap membrane 57 is surely waterproof.

Further, a lightning arrester 70 extends along the longitudinal direction of the flap film 57 at a substantially central position on the upper surface of the flap film 57. A part of the lightning protection hardware 70 is electrically connected to the roof steel frame 51 via the purlin steel frame 54.
Further, the roof steel frame 51 is grounded by a grounding means (not shown).

The procedure of fixing the roof membrane 52 to the purlin steel frame 54 and attaching the flap membrane 57 as an auxiliary membrane to the membrane end supporting portion 50 will be described with reference to FIG. Flange 54 of purlin steel frame 54 to which flap membrane 57 is fixed
A buffer sheet 58 made of synthetic rubber is attached to both ends of b. The edge 52a of the developed roof membrane 52 is pulled to the position of the buffer sheet 58, and the edge 52a is folded back in a bag shape so that the membrane edge treatment rope 59 is accommodated inside. Further, the pressing plate 56 is applied to the bag-shaped folded-back portion 60 so that the folded-back portion 60 is sandwiched between the pressing plate 56 and the buffer sheet 58, and the folded-back portion 60 is fixed to the upper surface of the flange 54b by the fixing bolt 55. . At this time, so that the edge portion 52a of the roof membrane 52 is fixed with a uniform pressing force along the longitudinal direction of the flange 54b, the pressing plate 56 is pressed by the thick plate pressing bar 61 along the longitudinal direction of the flange 54b. Press. Further, when the folded-back portion 60 is fixed, a uniform tension is applied to the roof membrane 52 in the stretching direction of the roof membrane 52, and the fixing position is finely adjusted so that wrinkles do not occur on the membrane surface.

On the other hand, the flange 54b of the purlin steel frame 54 is provided with two rows of bolt holes at a pitch of 200 mm in the longitudinal direction. A film protection cap 64 is attached to the tip of the fixing bolt 55 attached to this bolt hole. As shown in the cross section of FIG. 6, the film protection cap 64 is a rod-shaped die member made of aluminum whose upper surface is processed to have a predetermined curvature. By covering the tip of the fixing bolt 55 with the membrane protection cap 64, it is possible to prevent a part of the roof membrane 52 from coming into contact with the tip of the fixing bolt 55, and when the flap membrane 57 to be described later is stretched, The flap film 57 can be stretched with a predetermined curvature following the shape of the shoulder 64a of the film protection cap 64.

Further, the base square member 65 is welded to the center position in the width direction of the flange 54b in accordance with the film protective cap 64 being attached to the bolt. This base square member 65 is shown in FIG.
As shown in FIG. 3, the aluminum pipes are stacked in two stages, and the total height thereof is set to be substantially equal to the top height of the membrane protection cap 64 attached to the fixing bolt 55. In this state, the flap membrane 57 is attached so as to cover the membrane edge supporting portion 50. At the time of attachment, a method is used in which both edge portions 57a of the flap membrane 57 are directly welded to the surface near the edge of the roof membrane 52 stretched adjacent to each other with the roof steel frame 51 interposed therebetween.

Further, a lightning arrester 70 is attached on the base square member 65 so as to sandwich a part of the flap film 57. When assembling the lightning protection metal piece 70, first, a conductor support metal piece 67 made of aluminum, to which a cushion molding rubber 66 formed in a predetermined shape is attached, is attached to a base square member 65 with screws 6.
Fix with 3. Then, the strip-shaped lightning conductor 68 made of a thin copper plate is housed in the recess of the conductor-supporting metal 67, and the strip-shaped lightning conductor 68 is covered with an aluminum cap 69. By the series of operations described above, the attachment of the auxiliary film covering the portion where the roof film 52 is fixed is completed.

[0009]

By the way, the supporting structure of the auxiliary film having the above-mentioned structure has a large number of parts, and among them, there are many custom-molded parts, so that the parts cost is high.
In addition, since the number of man-hours required to attach each component is high, the construction cost of the auxiliary membrane attachment work is high.

Further, as shown in FIG. 6, the conductor supporting metal member 68 is fixed to the metal base square member 65 with the screw 63. Further, the base square member 65 is directly welded to the flange surface of the purlin steel frame 54. For this reason, a thermal bridge with a small heat transmission resistance is easily formed along these components, especially in the winter and the like, cold outside air is transmitted to the roof steel frame, the surface temperature of the steel frame decreases, and the temperature difference between the interior and The surface of the steel frame will be condensed due to the relationship. When the dew condensation is remarkable, water drops may drop directly on the ceiling or floor surface, and each part may be wet or may be stained by bleeding or the like.

Therefore, the object of the present invention is to solve the problems of the above-mentioned conventional techniques, to support the auxiliary membrane of a membrane structure roof having a structure having a small number of parts, easy construction, and excellent heat insulation performance. To provide the structure.

[0012]

In order to achieve the above object, the present invention is a membrane end fixed to a part of a purlin steel frame on which a membrane end supporting portion of a roof membrane is provided, and the membrane end of the roof membrane is fixed. A base member made of a foam molded plate material that covers the support portion, and a part of the base member is supported on the upper surface of the base member, and its edge portion is formed on the roof membrane surface so as to be stretched according to the shape of the upper surface. It is characterized by comprising a welded auxiliary film.

In the auxiliary film, a conductor support band is previously welded to a predetermined position on the surface of the auxiliary film, and after the edge portion is welded to the roof film surface, a lightning conductor is attached to the conductor support band. Is preferred.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a support structure for an auxiliary membrane of a membrane structure roof of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partially enlarged cross-sectional view showing a support structure for an auxiliary membrane of the membrane structure roof of the present invention. This membrane structure roof includes a roof steel frame and a purlin steel frame 54 having the same structure as the conventional membrane structure roof shown in FIG. The roof membrane 52 is
It is fixed to the flange 54b of the purlin steel frame 54 by a method similar to the mounting method described with reference to FIG. That is, buffer sheets 58 made of synthetic rubber are attached to both ends of the flange 54b of the purlin steel frame 54, and the roof membrane 5
The edge part 52a of 2 is pulled up to the position of the buffer sheet 58, and is folded back in a bag shape so as to accommodate the membrane end treatment rope 59 inside. Further, the pressing plate 56 is applied to the folded-back portion 60 of the bag-shaped portion so as to be sandwiched between the pressing plate 56 and the cushioning sheet 58, and the folded-back portion 60 is integrally fixed to the flange 54b by the fixing bolt 55. ing. At this time, the edge portion 52a of the roof membrane 52 is evenly pressed by the flange 54
The pressing plate 61 is pressed by the thick pressing bar 61 along the longitudinal direction of the flange 54b so as to be fixed on b. Further, when fixing the edge portion 52a, uniform tension is introduced into the film in the straddling direction. The fixing position is adjusted so that wrinkles do not occur on the film surface. The same components as those of the conventional fixing means for the roof membrane 52 shown in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted.

Further, a base spacer material 10 and a base foam material 11 as base members for tensioning the flap film 20 as an auxiliary film on the film end supporting portion 50 are attached to the surface of the flange 54b of the purlin steel frame 54. There is. The base spacer material 10 and the base foam material 11 are both made of expanded polystyrene resin plate material. Of these, the base spacer material 10 is, as shown in FIG.
It is adhered on the flange 54b so as to close the recessed portion formed between the two edge treatment ropes 59,59. The height is set to be substantially equal to the upper surface of the pressing bar 61. The expanded polystyrene resin plate material used for the base spacer material 10 is a molded plate material having a high heat insulating property and made of a foamed resin molded by a known bead foam molding method, for example.

Foaming resins that can be used for this molded plate material include, in addition to the expanded polystyrene resin, expanded polyethylene resin and expanded polypropylene resin. It is also preferable to use a plate material formed by an extrusion molding method. The plate material formed by the extrusion molding method can be expected to be relatively dense and have higher strength than that formed by the bead foam molding method.

A base foam material 11 is laminated and adhered on the base spacer material 10. As shown in the figure, the base foam material 11 has a through hole 12 for accommodating the tips of the fixing bolts 55 protruding in two rows on the flange surface.
Are formed along the longitudinal direction at a pitch equal to the bolt mounting interval. In the present embodiment, the width of the base foam material 11 is set to be substantially equal to the width of the flange 54b of the purlin steel frame 54, and its height is about twice the protruding length of the fixing bolt 55 housed in the through hole 12. It is set to a degree. Further, equilateral angle steel 13 is applied to both shoulders of the base foam material 11 as corner members. Accordingly, it is possible to prevent the corner portions of the base foam material 11 made of a soft expanded polystyrene resin plate material from being dented and deformed.

A flap film 20 as an auxiliary film is attached so as to cover the entire base foam material 11. This flap film 20 is supported following the shape of the upper surface of the base foam material 11, and its edge portion 20a is stretched adjacently with the roof steel frame 51 sandwiched therebetween as in the conventional mounting method shown in FIG. It is directly welded to the surface of the roof membrane 52 near the edge.

A conductor support band 21 is welded to the upper surface of the flap film 20 in the longitudinal direction. As shown in FIGS. 1 and 2, the conductor supporting band 21 is used for the flap membrane 20.
It is an elongated strip-shaped body that is welded over the entire length in the longitudinal direction of the flap film 20 at a substantially central position in the width direction. The conductor support band 21 includes a base cloth 22 and a plurality of strips 23 welded along the longitudinal direction of the base cloth 22 at predetermined intervals. The welding of the strip 23 to the base cloth 22 and the welding of the completed conductor supporting strip 21 to the flap film 20 are performed at the factory manufacturing stage. Therefore, at the stage where the flap membrane 20 is applied on site, the conductor support band 21 is already attached.

The elongated copper plate piece 25 as a lightning conductor is fixed to the conductor support band 21 after the edge 20a of the flap film 20 is welded to a part of the roof film 52. This thin copper plate piece 2
5 can be fixed to the conductor support band 21 only by inserting the elongated copper plate pieces 25 between the strips 23 mounted on the base cloth 22 and the base cloth 22. This thin copper plate piece 25 is
Since it is a thin plate, it can be wound in a roll shape, and this roll can be loaded onto the membrane structure roof, and one span of the roof steel frame 52 can be constructed with one elongated copper plate piece 25. Then, one end of the elongated copper plate piece 25 may be connected to a grounding structure portion provided in a beam receiving portion (not shown) at the beam end position of the roof steel frame so as to be grounded. Needless to say, it is not necessary to attach the conductor support band 21 to the flap membrane 20 of the roof steel frame portion to which the lightning conductor is not attached.

As the procedure for attaching the base spacer material 10, the base foam material 11, the flap film 20 and the elongated copper plate piece 25 described above, first, after fixing the roof membrane 52 to the membrane end support portion, the purlin steel frame 54 is fixed. The base spacer material 10 is adhered onto the flange 54b, and the base foam material 11 is further adhered to the base spacer material 10 so as to be laminated. afterwards,
The flap film 2 covers the upper surface of the base foam material 11.
0 is set up. Then, a thin copper plate piece 25 is attached to the conductor supporting band 21.
And a series of installation work is completed.

FIG. 2 shows an elongated copper plate piece 25 as a lightning conductor.
FIG. 4 is a perspective view showing the state of attachment of the above to the conductor support band 21 so that it can be understood. As shown in the figure, the conductor support band 2 previously attached to the upper surface of the flap film 20.
Since the elongated copper plate piece 25 can be reliably supported by the strip 23 of No. 1, it is not necessary to support the fixing member and the like by penetrating to the purlin steel frame 54 side. Therefore, no thermal bridge is formed between the lightning conductor and the roof steel frame. Further, the heat insulating effect of the expanded polystyrene resin plate materials 10 and 11 used as the base material maintains the heat insulating property of the roof steel frame. Therefore, it is possible to reliably prevent dew condensation on the roof steel frame. Further, since the flap film 20 is stretched so as to directly cover the upper surface of the base foam material 11, wrinkles and slack are less likely to occur in the flap film 20.

FIG. 3 is a partial cross-sectional view showing another embodiment of the conductor support band 21. The conductor supporting band 21 shown in FIG. 5A is a flap film 20 to which a band piece 23 is directly welded. When the roof span is small, the capacity of the elongated copper plate piece 25 as the lightning conductor may be small, so that a thin plate can be used. In that case, the flap membrane 2
It is also possible to weld a plurality of strips 23 to the surface of 0 at a predetermined interval. Also in this case, the welding of the strips 23 is preferably performed at the factory production stage. FIG. 2B shows an embodiment in which the entire elongated copper plate piece 25 is housed in an aluminum sheath 26 in order to prevent patina from rusting on the exposed elongated copper plate piece 25. Is shown. Since the sheath tube 26 is formed by flattening a circular tube, both end portions 26a have a rounded shape. Therefore, even when the elongated copper plate piece 25 vibrates finely due to wind or the like, it is possible to prevent the welded portion of the strip piece 23 from being damaged.

The flap membrane 20 and the conductor support band 21 described above are preferably made of the same material as the roof membrane 52. Further, the tensile strength of the conductor support band 21 may be set higher than that of other film materials. As the membrane material used,
In addition to glass fiber woven cloth coated with tetrafluoroethylene resin as a main component, vinyl chloride resin, chloroprene rubber, chlorosulfonated polyethylene rubber, etc. as a coating material are preferable. . Also, as the woven cloth, in addition to the glass fiber woven cloth,
It can also be applied to a membrane material using a woven fabric of synthetic resin fibers such as polyamide type, polyaramid type, polyester type or polyvinyl alcohol type resin. In the above description, the arched steel frame structure composed of the cylindrical shell shown in FIG. 4 is taken as an example, but as the steel frame structure to which this support structure of the auxiliary membrane can be applied, various structural types such as a space truss structure are available. It goes without saying that there is

[0025]

As is apparent from the above description, according to the present invention, in the fixing portion of the roof membrane, the supporting structure of the auxiliary membrane, which is inexpensive and has excellent heat insulation performance against the outside air temperature, can be provided with a small number of parts. The effect is that it can be easily assembled.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view showing an embodiment of a support structure for an auxiliary membrane of a membrane roof according to the present invention.

FIG. 2 is a partial cross-sectional perspective view showing an embodiment of a support structure for an auxiliary membrane of a membrane structure roof according to the present invention.

FIG. 3 is a partially enlarged cross-sectional view showing another embodiment of the conductor support band.

FIG. 4 is a partial cross-sectional perspective view showing a part of an arched roof of a conventional membrane structure roof.

5 is a partial cross-sectional perspective view showing an enlarged view of the roof steel frame shown in FIG. 4 and a membrane end supporting portion of a roof membrane.

FIG. 6 is a partially enlarged cross-sectional view showing a further enlargement of the membrane end supporting portion shown in FIG.

[Explanation of symbols]

 10 Base Spacer Material 11 Base Foam Material 20 Flap Membrane 21 Conductor Support Band 25 Elongated Copper Plate Piece 50 Membrane End Support 52 Roof Membrane 54 Purlin Steel Frame

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Yoshiyuki Nakamura 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Corporation (72) Inventor Ryotaro Kaneda 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo No. Taisei Corporation (72) Inventor Kenichi Fujita 3-22-1 Higashiyama, Meguro-ku, Tokyo Taiyo Kogyo Co., Ltd. (72) Inventor Makoto Kikushima 3-22-1 Higashiyama, Meguro-ku, Tokyo Taiyo Kogyo Co., Ltd. Inside the formula company (72) Inventor Shigeto Utsunomiya 3-22-1 Higashiyama, Meguro-ku, Tokyo Taiyo Kogyo Co., Ltd. (72) Inventor Katsuhiro Takagi 3-22-1 Higashiyama, Meguro-ku, Tokyo Taiyo Kogyo Co., Ltd.

Claims (2)

[Claims] 1. A base member made of a foam molded plate material fixed to a part of a purlin steel frame provided with a membrane end supporting portion of a roof membrane and covering the membrane end supporting portion to which the membrane end of the roof membrane is fixed; A membrane, characterized in that a part of the membrane is supported on the upper surface of the member, and an auxiliary membrane is welded to the roof membrane surface at its edge so that the member is stretched according to the shape of the upper surface. Structural support structure for auxiliary membrane of roof. 2. A conductor support band is previously welded to a predetermined position on the surface of the auxiliary film, and after the edge portion is welded to the roof film surface, a lightning conductor is attached to the conductor support band. The support structure for an auxiliary membrane according to claim 1, wherein: