JP2806114B2 - Connection structure of membrane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for connecting connection ends to each other so that substantially uniform tension acts continuously over the entire length of the connection end of a membrane.

[0002]

2. Description of the Related Art In recent years, there has appeared a structure in which a roof of a large space facility or the like having a pillarless structure such as a dome is constructed as a membrane roof. In this connection structure of the membrane, the upper end of the outer wall surrounding the large space facility is covered with a membrane formed of a waterproof flexible membrane. The membrane roof is inflated (expanded) by injecting air into the inside of the facility, and a dome-shaped roof having a central portion swelled in the inflated state is formed.

[0003] Incidentally, since the membrane roof needs to continuously cover a large space facility, its area becomes extremely large. Therefore, the membrane body constituting this membrane roof is formed by connecting a plurality of membrane pieces to each other. The whole is formed. At this time, the connection between the membrane pieces is, for example, a
As described in Japanese Patent Publication No. 24857 (E04H 15/54), this is performed via a connection fitting. That is, the connection fitting includes inner and outer presser fittings disposed on both sides of the film body so as to straddle between the connection ends of the film pieces. It is configured to be tightened via a nut. And, since the connection end portions of the film pieces are sandwiched between the presser foot, even if a large tension acts on the film body, it is possible to prevent the connection portion from being easily separated. I have.

[0004]

However, in such a conventional connection structure for a membrane member, the inner and outer holding members provided on the connection fitting for connecting the respective membrane pieces are connected to each other through bolts and nuts. They can be tightened at appropriate intervals. Therefore, the tension acting between the membranes connected to each other concentrates on the tightened portions of the bolts and nuts, and the membranes are easily broken at the concentrated portions of the tension, and thus, the tension of the membranes increases. The durability is significantly reduced.

[0005] Further, in the connection portion of the membrane, a high liquid-tight function can be obtained between the membrane piece and the presser foot in the vicinity of the tightening portion of the bolt and the nut, but in the portion away from the tightening portion, the liquid-tightness is obtained. And there is a risk that rainwater or the like may enter.

In view of the foregoing, the present invention has been made in consideration of the above-described conventional problems, and enables a uniform tension to be continuously applied over the entire length of a connection end portion of a film body, and a sealing property of the film body to be significantly improved. The purpose of the present invention is to provide a connection structure.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to hold a connecting end of a film body continuously, and to hold the holding member with its tip end bulging, and to hold the holding member. A connecting member formed at both ends with a continuous bifurcated gripping portion, wherein the holding members respectively held at the connection ends of the membrane to be connected are held at both ends of the connecting member. Connect the bodies together, and inside the tip of the gripper
A magic fastener is provided between the holding member and the holding member .

A first fitting groove is formed outside the distal end portion of the holding member, and a first press-fitting member is press-fitted into the first fitting groove, and the first press-fitting member is press-fitted into the first press-fitting member. It is desirable to make the expanding force of the fitting groove act as the closing force of the holding member.

Further, a second fitting groove is formed outside the connecting member, and a second press-fitting member is press-fitted into the second fitting groove, and the second fitting is press-fitted with the second press-fitting member. It is desirable that the expanding force of the groove act as a closing force of the gripping portion of the connecting member.

Further, it is desirable that the connection end of the film body sandwiched by the sandwiching member is wound around a core material and then folded, and the folded portion is fixed.

[0011]

According to the above structure, in the connection structure of the film body of the present invention, the connection end of the film body is continuously held by the holding member, and the holding member is held by the holding portion of the connecting member. Thus, the swelling portion at the distal end of the holding member is locked in the holding portion while holding the film body. Therefore, the holding member is held by the holding portion, and the bulging portion is locked, so that the holding member can be prevented from being pulled out of the connecting member. In addition, since the connection end of the membrane is sandwiched by the sandwiching member and gripped by the gripping portion, the removal of the membrane can be prevented. For this reason, the connection ends of the membranes to be connected to each other are connected to each other via the holding member and the connecting member. Further, the holding member continuously holds the connecting end of the membrane, and the gripping portion continuously holds the holding member. An even clamping force acts, and in turn, an even tension can be continuously applied to the connection end. In addition, the inside of the tip of the
The magic fastener is provided between the
And the coupling force between the gripping portion and the holding member increases,
Can further increase the closing force of the holding member.

A first fitting groove is formed outside the distal end of the holding member, and a first press-fitting member is press-fitted into the first fitting groove, and the first press-fitting member is press-fitted into the first press-fitting member. By causing the expanding force of the fitting groove to act as the closing force of the sandwiching member, the force by which the sandwiching member sandwiches the connection end of the membrane is increased by the closing force, and the connecting force of the membranes is extended. Can be further increased.

[0013] Further, a second fitting groove is formed outside the connecting member, and a second press-fitting member is press-fitted into the second fitting groove. By causing the expanding force of the groove to act as a closing force of the gripping portion of the connecting member, the force of gripping the holding member by the gripping portion is increased by the closing force, and the connection between the membrane members is extended. The force can be increased more.

Further, the connection end of the film body sandwiched by the sandwiching member is wound around a core material and folded, and the folded portion is fixed, whereby the wound portion of the core material is locked by the sandwiching member. As a result, the removal of the film body can be reliably prevented.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show one embodiment of a connection structure of a membrane body according to the present invention, FIG. 1 is a schematic configuration diagram showing a cross section of a large space facility using a roof membrane to which the present invention is applied, and FIG. FIG. 2 is an enlarged cross-sectional view of a connection portion of the film body corresponding to line AA in FIG. 1.
FIG. 3 is an exploded cross-sectional view showing a main part of a connection portion of the film body.

That is, the large space facility shown in FIG. 1 is used as an indoor artificial skiing area 10, and outer walls 12, 12 are formed on both sides in a direction perpendicular to the plane of the drawing, and the upper ends of these outer walls 12, 12 are constructed. A membrane roof 14 is stretched between the sections. The floor surface 18 of the large space 16 composed of the outer walls 12 and 12 and the membrane roof 14 is continuously inclined in the direction in which the outer walls 12 and 12 extend. The slopes are made up of snow and can be slid on the snow.

The membrane roof 14 is shown in a solid line state in FIG. 1 as being inflated by injecting air into the large space portion 16, and in a two-dot chain line state, the internal air pressure is eliminated. And deflated (contracted). The membrane roof 14 is supported by a plurality of cables (not shown) provided between the upper ends of the outer walls 12 and 12. The machine room 24 and the lift room 2 are located outside the outer walls 12 and 12.
The machine room 24 is provided with an air conditioner, an artificial snowmaker, a snow gun, and the like.

As shown in FIGS. 2 and 3, the entire membrane 30 constituting the membrane roof 14 is constructed by connecting a plurality of membrane pieces 30a to one another. These membrane pieces 30
The connection of “a” is performed by a holding member 32 that holds each of the connection end portions, and a connecting member 34 that holds each of the pair of holding members 32.

As shown in FIG. 3, the holding member 32 is formed of a flexible member having a certain degree of rigidity such as a flexible high-strength plastic or the like, and is continuously formed in a forked shape. The connection end of the film piece 30a is held therein. In addition, a bent fitting portion 32b that bends and fits the connection end to the branch end portion of the forked portion 32a.
Are formed.

A bulging portion 32c is formed continuously at the distal end (the right end in the figure) of the holding member 32, and a continuous dovetail-shaped groove is formed outside the distal end of the bulging portion 32c. The first fitting groove 32d is formed. The first press-fitting member 36 is press-fitted into the first fitting groove 32d after the connection end of the membrane piece 32a is sandwiched between the forked portions 32a.
When the connection end of the film piece 30a is clamped by the clamping member 32, the gap between the film piece 30a and the clamping member 32 is fused.

On the other hand, the connecting member 34 is disposed so as to straddle between the connection ends of the membrane pieces 30a, 30a to be connected to each other, and holding portions 34a, 34a for holding the holding member 32 at both ends. 34a are formed. The gripping parts 34a, 3
4a is formed in a forked shape continuous in the connection direction (the direction perpendicular to the paper surface in FIG. 2), and its cross-sectional shape is formed along the outer shape of the holding member 32. Also, the connecting member 34 is formed of a flexible member such as plastic having a certain degree of rigidity similarly to the holding member 32.

Outside the upper ends of the connecting member 34 in the figure, second dovetail-shaped second fitting grooves 34b, 34b are formed.
The second press-fitting member 38 is pressed into these second fitting grooves 34b after the holding member 32 is held between the gripping portions 34a.

In this embodiment, the gripper 34
The magic fasteners 40, 40 are provided between the inside of the distal end portion a and the holding member 32, and the coupling force between the holding portion 34a and the holding member 32 is increased.

With the above structure, in the connection structure of the film body 30 of this embodiment, the film piece 30a constituting the film body 30 is formed.
When the two members are to be connected to each other, the connecting end of the membrane piece 30a is held by the holding member 32, and the holding member 3
2 is held by the holding portion 34 a of the connecting member 34. Then
The bulging portion 32c of the holding member 32 is locked inside the holding portion 34a to prevent the holding member 32 from being pulled out of the holding portion 34a, so that the film held by the holding member 32 is prevented. The pieces 30a can be connected to each other.

When the film pieces 30a are connected to each other via the holding member 32 and the connecting member 34 as described above, the holding member 32 continuously holds the connection end of the film piece 30a. Since the holding portion 34a continuously grips the holding member 32, it is possible to fix each connection end with a substantially uniform holding force over the entire length thereof. And an even tension can be applied. Therefore, the tensile strength is not concentrated on the connecting portions of the film pieces 30a, and the durability of the film body 30 can be significantly improved.

Further, in the connection structure of the membrane body 30 of the present embodiment, the first fitting groove 3
2d, and the first press-fit member 3 is inserted into the first fitting groove 32d.
8 is press-fitted, the first fitting groove 32d into which the first press-fitting member 38 is press-fitted is expanded, and the expanding force F
1 acts as a closing force F2 on the tip end side of the holding member 32. Therefore, the force of the holding member 32 holding the connection end of the membrane piece 30a is increased by the closing force F2, and the connection force between the membrane pieces 30a can be further increased.

Further, in the present embodiment, the second fitting groove 34b is formed outside the connecting member 34, and the second press fitting member 38 is press-fitted into the second fitting groove 34b. The expanding force F3 of the second fitting groove 34b into which the second press-fitting member 38 is press-fitted can act as a closing force F4 on the distal end of the grip portion 34a. Therefore, the closing force F4
As a result, the force for gripping the holding member 32 by the gripping portion 34a increases, and the connecting force between the membrane pieces 30a can be further increased.

FIG. 4 shows another embodiment, in which the same components as those of the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The figure is shown as a cross section of one half.

That is, in this embodiment, the connection end of the membrane piece 30a is wound around the core member 50 and folded, and the folded portion is fused. Then, the folded portion around which the core material 50 is wound is held in the holding member 32 in the same manner as in the above-described embodiment.
And held by the holding portion 34a of the connecting member 34.

Therefore, in this embodiment, the connection end of the membrane piece 30a is formed by winding the core material 50 and then folding the folded portion with the holding member 32, so that the winding portion of the core material 50 is engaged. As a stop portion, it is locked inside the holding member 32. Therefore, a large resistance force is generated against the force with which the film piece 30a comes out of the holding member 32, that is, the tension acting on the film body 30, and the connection force between the film pieces 30a can be further increased.

In this embodiment, a reinforcing member 52 made of canvas, glass fiber, stainless steel wire or the like is embedded inside the connecting member 34, so that the strength of the connecting member 34 itself is remarkably improved.

FIG. 5 shows another embodiment, in which the same reference numerals are given to the same components as those in each of the above embodiments, and a duplicate description will be omitted. It should be noted that this figure is a half sectional view on one side, similarly to FIG.

That is, in this embodiment, the bulging portion 32c of the holding member 32 is not provided with the first fitting groove and the first press-fitting member shown in each of the above embodiments, and is provided inside the forked portion 32a of the holding member 32. The connection end of the film piece 30a is fused.

Therefore, in this embodiment, the gap between the holding member 32 and the film piece 30a is fused, so that the removal of the film piece 30a can be sufficiently prevented. Since the first press-fitting member is not provided, the holding member 3
2 can be simplified.

Since the holding member 32 and the connecting member 34 shown in each of the above-mentioned embodiments are formed of a plastic having high rigidity and flexibility, the weight can be remarkably reduced, and the roof can be extended. The weight of the membrane 14 itself can be reduced. Therefore, the overpressure inside the facility required when the roof membrane 14 is inflated can be set low, and the blower can be downsized. Further, in the present embodiment, the case where the present invention is applied to the membrane roof 14 is disclosed, but it goes without saying that the present invention is not limited to this and can be applied to connection of general membranes.

[0036]

As described above, in the connection structure of the film body according to the present invention, after the connection end of the film body is clamped by the continuous clamping member, the clamping member is clamped by the gripping portion of the connecting member. Since the connection ends are continuously gripped, a substantially uniform clamping force acts on the connection end of the membrane body over its entire length, and thus a uniform tension is continuously applied to the connection end in the connection direction. Can work. Therefore, it is possible to prevent the tensile force from being concentrated on the connection portion of the film body, to significantly improve the durability of the film body, and to improve the sealing property of the connection portion. Also, the inside of the tip of the gripping portion and the holding member
By holding a magic fastener between
The binding force between the part and the holding member is increased,
The closing force of the member can be further increased .

According to the second aspect of the present invention, the first press-fitting member is press-fitted into the first fitting groove formed on the outside of the distal end portion of the holding member. The force of expanding the first fitting groove expanded by the press-fitting can be used as a closing force of the holding member, and the force of the holding member holding the connection end of the film body is increased to increase the force of the film bodies. The connection force can be further increased.

Further, according to the third aspect of the present invention, since the second press-fitting member is press-fitted into the second fitting groove formed outside the connecting member, the second press-fitting member is press-fitted. The expanding force of the expanded second fitting groove can be made to act as a closing force of the gripping portion of the connecting member, and the gripping portion increases the gripping force of the gripping member to increase the force of the film members. The connection force can be further increased.

Further, in claim 4 of the present invention,
The connection end of the film body held by the holding member is wound around the core material and folded back, and the folded portion is fixed, so that the wound portion of the core material is locked by the holding member and the film body is removed. And various excellent effects that can be surely prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a cross section of a large space facility using a roof membrane to which the present invention is applied.

FIG. 2 is an enlarged cross-sectional view of a portion corresponding to line AA in FIG. 1 showing one embodiment of the present invention.

FIG. 3 is an exploded cross-sectional view showing a main part of a connection portion of a film body according to an embodiment of the present invention.

FIG. 4 is an enlarged sectional view of one half showing another embodiment of the present invention.

FIG. 5 is an enlarged sectional view of a half of one side showing still another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Artificial skiing area (large space facility) 12 Outer wall 14 Membrane roof 30 Membrane 30a Membrane piece 32 Clamping member 32c Swelling part 32d First fitting groove 34 Connecting member 34a Gripping part 34b Second fitting groove 36 First press fit Member 38 Second press-fitting member 50 Core material

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Toru Aoyagi 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (56) References JP-A-49-87116 (JP, A) (58) Surveyed field (Int.Cl. ⁶ , DB name) E04H 15/54

Claims (4)

(57) [Claims] 1. A connecting member for continuously holding a connection end of a membrane body and swelling the tip end side, and a continuous bifurcated holding portion for holding the holding member at both ends. And connecting the membrane members together by gripping the holding members respectively held at the connection end portions of the membrane members to be connected, at both ends of the connecting member, and connecting the inside of the distal end portion of the gripping portion.
A connection structure for a film body, wherein a magic fastener is provided between the holding member and the holding member . 2. A first fitting groove is formed outside the distal end portion of the holding member, and a first press-fitting member is press-fitted into the first fitting groove, and the first press-fitting member is press-fitted into the first press-fitting member. 2. The connection structure for a membrane according to claim 1, wherein the expanding force of the fitting groove acts as a closing force of the holding member. 3. A second fitting groove is formed outside the connecting member, and a second press-fitting member is press-fitted into the second fitting groove, and the second fitting is press-fitted into the second press-fitting member. The connection structure for a film body according to claim 1 or 2, wherein the expanding force of the groove acts as a closing force of the grip portion of the connecting member. 4. The membrane according to claim 1, wherein the connection end of the membrane body sandwiched by the sandwiching member is wound around a core material and folded, and the folded portion is fixed. Connection structure of the body.