JP2872988B1 - Bonding structure between antifouling membrane materials in membrane structure - Google Patents

Abstract

An object of the present invention is to provide a film structure formed by thermally welding edges of two adjacent film materials to each other so that a black line due to an organic substance such as a mold does not appear at a joint portion between the two film materials. Thus, the appearance of the film structure is kept good. SOLUTION: A plurality of heat-meltable resin film materials 5, 6 are provided in parallel. The surface 9 of the edge 11 of one of the film materials 5 among the respective edges 11, 11 of the adjacent film materials 5, 6 facing each other.
a, an edge 11 of the other film material 6 facing the edge 11;
The edges 11, 11 of the film materials 5, 6 are overlapped with each other so that the back surface 10a of the film members is bonded. The above one film material 5
The titanium oxide film 14 is coated on the general surface 9b excluding the surface 9a of the edge portion 11 from the surface 9 of the substrate, and the titanium oxide film 14 is coated on the surface 9 of the other film material 6. The two edges 11, 11 are heat-welded to each other at an intermediate portion in the width direction of the overlapping portion of the both edges 11, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is formed by arranging a plurality of antifouling membrane materials side by side and joining mutually opposing edges of both adjacent antifouling membrane materials by heat welding. In a membrane structure such as a tent, the present invention relates to a structure of a joint portion between the two antifouling membrane materials.

[0002]

2. Description of the Related Art Among the above-mentioned membrane structures, there are those conventionally constituted as follows.

[0003] That is, a plurality of heat-meltable resin film materials are juxtaposed, and of the opposing edges of both adjacent film materials,
The respective edges of the two film materials are overlapped with each other such that the back surface of the edge of the other film material facing the edge is joined to the surface of the edge of one film material. Then, the two edges are thermally welded to each other at a middle part in the width direction of the overlapping portion of the both edges, and the two film materials are bonded to each other,
The membrane structure is formed.

[0004]

In the above-mentioned prior art, a small gap is formed between the edge of one film material and the edge of the edge of the other film material facing this edge. As a result, organic matter such as mold may be generated early by rainwater that has entered the gap.

[0005] When this occurs, a black line of the organic material appears along the joint of the edges of the two film materials with each other, which significantly reduces the appearance of the film structure. This is not preferred.

Therefore, the surface of each of the above film materials is coated with, for example, a titanium oxide film acting as a photocatalyst,
It is conceivable to use an antifouling film material. In other words, the titanium oxide film promotes an oxidation or reduction reaction caused by the ultraviolet light applied to the surface of each of the film materials, effectively decomposes organic substances such as molds, and thereby has an antifouling property on the surface of each of the film materials. (Including sterilization and deodorization). For this reason, when the titanium oxide film is coated as described above, it is considered that generation of an organic substance such as mold in the gap is prevented, and the appearance of the film structure is favorably maintained for a long time.

However, when a titanium oxide film is coated on the surface of each of the above-mentioned film materials, the titanium oxide film is generally difficult to be melted by heat. It is hindered by the titanium oxide film, and therefore, there is a possibility that a sufficient bonding strength cannot be secured at a bonding portion between the two film materials.

Further, even if the edges of the two film materials are bonded to each other by welding together with the titanium oxide film interposed therebetween, the film material is transparent (semi-transparent). In the case where the film material is made of resin, the film material, which is made of resin and is an organic substance, is decomposed by ultraviolet rays of light that has passed through the film material and reached the titanium oxide film at the joint between the film materials. Therefore, the bonding strength may be reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is formed by arranging a plurality of film materials in parallel and joining edges of both adjacent film materials to each other by heat welding. An object of the present invention is to prevent a black line due to an organic substance such as mold from appearing at a joint portion between the two film materials so that the appearance of the film structure is kept good.

It is another object of the present invention to secure sufficient bonding strength by thermal welding between the two film materials even when the good appearance is maintained as described above.

[0011]

Means for Solving the Problems The structure of the joint between the antifouling membrane materials in the membrane structure of the present invention for solving the above problems is as follows.

In the first aspect of the present invention, a plurality of heat-meltable resin film materials 5 and 6 are provided side by side, as shown in all the drawings, and each of the two adjacent film materials 5 and 6 faces each other. Edge 11, 11
Among them, the front surface 9a of the edge portion 11 of one film material 5 is provided on the back surface 10a of the edge portion 11 of the other film material 6 facing the edge portion 11.
The edges 11, 11 of the two film materials 5, 6 are overlapped with each other so as to join together, and a titanium oxide film is formed on the general surface 9b obtained by removing the surface 9a of the edge 11 from the surface 9 of the one film material 5. 14 and the other film material 6
The surface 9 is coated with a titanium oxide film 14, and the two edges 11, 11 are heat-welded to each other at an intermediate portion in the width direction of the overlapping portion of the both edges 11, 11.

According to a second aspect of the present invention, as illustrated in all the drawings, in addition to the first aspect of the present invention, the edge 14a of the titanium oxide film 14 on the edge portion 11 side of the one film material 5 is provided. The film member 6 faces the edge of the back surface 10a of the edge portion 11 in the other film material 6.

According to a third aspect of the present invention, as shown in FIGS.
The surface 9a of the edge portion 11 of the one film material 5 in the portion where the heat welding A is performed is the general surface 9b of the one film material 5.
It is a step surface which is lowered in a step shape from the step.

According to a fourth aspect of the present invention, as shown in all the drawings, in addition to any one of the first to third aspects, the film materials 5 and 6 are made transparent.

[0016]

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

(First Embodiment)

FIGS. 1 to 3 show a first embodiment.

In the drawing, reference numeral 1 denotes a membrane structure, specifically, a tent installed outdoors or indoors, and the tent is held in shape by a frame (not shown). In the drawing, “IN” indicates the inside of the film structure 1 and “OUT” indicates the outside.

The membrane structure 1 includes a plurality of antifouling membrane materials 2,
3 are formed side by side, and the mutually facing edges of both adjacent antifouling membrane materials 2 and 3 are joined by heat welding.

Each of the antifouling film materials 2 and 3 has a film material 5 and 6 made of a hot-melt resin, and each of the film materials 5 and 6 has a base material which is a cloth material inside thereof. 7, the film materials 5, 6 are sufficiently reinforced. The film materials 5 and 6 are made of a synthetic resin such as PVC, while the base material 7 is made of PE.
The film materials 5 and 6 are colored blue, yellow, or the like, and are made opaque, or the film materials 5 and 6 are made opaque in cooperation with the base material 7. . Each surface 9 of the film materials 5 and 6 faces the outside of the film structure 1 and is an outer surface that comes into contact with rainwater, and each back surface 10 faces the inside of the film structure 1. The thickness dimension L ₁ of each film material 5,6 500~1000μm the like.

The surface 9a of the edge 11 of one of the film materials 5 among the opposing edges 11, 11 of the film materials 5, 6 constituting the adjacent antifouling film materials 2, 3 , This edge 1
1 so that the back surface 10a of the edge portion 11 of the other film material 6 opposed to the first material member 1 is directly joined.
1 are superimposed on each other.

From the surface 9 of the one film material 5 to its edge 1
A flexible titanium oxide film 14 is coated on the general surface 9b except for the surface 9a so as not to peel off.
The surface 9 of the other film material 6 is also coated with the titanium oxide film 14 in the same manner as described above. The thickness L ₂ of the titanium oxide film 14 is less than 3 μm, and the width L ₃ of the general surface 9 b of the edge 11 of the one film material 5 is 20 to 60 mm.

In the middle of the overlapping portion of the both edge portions 11 in the width direction, the two edge portions 1
1, 11 are heat-welded to each other. The heat welding A is performed by hot air welding, high frequency welding, or the like.

The edge 14a of the titanium oxide film 14 on the edge 11 side of the one film material 5 is opposed to the edge of the back surface 10a of the edge 11 of the other film material 6. The edge 14a of the titanium oxide film 14 and the edge of the back surface 10a of the edge 11 are portions where heat welding A is not performed, and a gap 15 is formed between them.
The edge 14a of the titanium oxide film 14 and the other film material 6
Width L ₄ of the edge and is facing portion of the rear surface 10a of the edge 11 of is approximately 1 mm.

The surface 9a of the edge 11 of the one film material 5 at the portion where the two edges 11, 11 are heat-sealed A is
Is from the general surface 9b of the film material 5 of the one and step surface which is lowered stepwise at its thickness direction, the step size L ₅ which lowered its is 10 to 30 [mu] m.

The surface 9a of the edge portion 11 of the film material 5, which is the step surface, is formed as follows. That is, first,
On the surface 9 of the film material 5 whose surface 9 is entirely flat,
1 and the entire surface of the titanium oxide film 14 is coated, and then the surface of the edge portion 11 and the titanium oxide film 14 coated on the surface are scraped off by a rotating buff or a canner. Thereby, the surface 9a is formed.

According to the above configuration, the titanium oxide film 14 coated on the surface 9 of each of the film materials 5 and 6 functions as a photocatalyst, so that the surface 9 of each of the film materials 5 and 6 is formed.
And a gap 15 between the edge 11 of the one film material 5 and the edge of the edge 11 of the other film material 6 facing the edge 11 is provided with a mold or the like. Attempts to generate organic matter are also prevented.

Therefore, the edge portions 11,
The appearance of a black line due to the organic material along the joints of the 11 is prevented, and the appearance of the film structure 1 is kept good.

In the above case, of the surface 9a of the edge portion 11 of the one film material 5 and the back surface 10a of the edge portion 11 of the other film material 6 to be joined to each other, Part 1
Since the titanium oxide film 14 is not coated on the first surface 9a, the thermal welding A of the both edges 11, 11 can be surely performed without being disturbed by the titanium oxide film 14, which is hardly melted by heat.

Therefore, even when the good appearance is maintained as described above, the bonding strength between the two film materials 5 and 6 due to the thermal welding A is sufficiently ensured.
Is sufficiently secured.

As described above, the edge 14a of the titanium oxide film 14 on the edge 11 side of the one film material 5
Is opposed to the edge of the back surface 10a of the edge 11 in the other film material 6, that is, the edge 14a of the titanium oxide film 14 enters the gap 15.

Therefore, the organic matter to be generated in the gap 15 is decomposed by the action of the photocatalyst on the edge 14a of the titanium oxide film 14, that is, the gap 1
5 is more reliably prevented, and the appearance of the film structure 1 is more reliably kept good.

Further, as described above, both edges 11, 11
The surface 9a of the edge portion 11 of the one film material 5 in the portion where the heat welding A is performed is a stepped surface which is stepped down from the general surface 9b of the one film material 5.

For this reason, when the edge 11 of the other film material 6 is brought into close contact with the lower step surface which is the surface 9a of the edge portion 11 of the one film material 5 and thermally welded A, the other film material 6 becomes A part of the edge 11 of the film material 6 is the general surface 9b of the one film material 5 described above.
Is pressed against the edge on the side of the edge 11 thereof, and the edge of the edge 11 of the other film material 6 is bent outward, so that the edge of the edge 11 of the film material 6 is One film material 5
Tends to separate from the titanium oxide film 14 coated on the general surface 9b, and the width of the gap 15 is further increased.

Therefore, while the other film material 6 is made of resin and is an organic material, the edge 11 of the other film material 6
The adhesion to the titanium oxide film 14 coated on the general surface 9b of the one film material 5 is prevented from being decomposed by the action of the photocatalyst of the titanium oxide film 14.

As a result, the edge of the edge portion 11 of the other film material 6 is a portion that is easily visible in appearance, but since this is kept in its initial shape, the above-described film The appearance of the structure 1 is kept good.

In the above case, the above-mentioned part of the edge 11 of the other film material 6 comes into close contact with the edge of the titanium oxide film 14, but the film material 6 is opaque and Is difficult to reach, and the contact portion is located at the deep portion of the gap 15. At this point, too, light does not easily reach, so that the part of the edge 11 of the film material 6 is not oxidized. Decomposition by the action of the titanium film 14 is suppressed.

Although the above description is based on the illustrated example, the respective back surfaces 1 of the film materials 5 and 6 are provided within a range that does not hinder the heat welding A.
0 may be coated with a titanium oxide film 14.

Further, in cooperation with the base material 7, only the film materials 5, 6 or the other film material 6 is transparent (including translucent light transmittance of 10 to 15% or more). Is also good.

As described above, when at least the other one of the two film materials 5 and 6 is transparent in cooperation with the base material 7, the edges 11 and 11 of the two film materials 5 and 6 are formed. The ultraviolet light of light passes through the film material 6 and the base material 7 to reach the contact portion between the both edges 11, 11 at the joint portion between the two, and the contact portion is formed as described above. Since the titanium oxide film 14 does not exist, the edge 11 of the film material 5 is prevented from being decomposed by the titanium oxide film 14.

Accordingly, even when the film material 6 is transparent and light is introduced into the inside of the film structure 1, the bonding strength of the film materials 5 and 6 due to the thermal welding A over time increases. This is prevented from being lowered, and this bonding strength is sufficiently ensured, which is beneficial for the life.

(Second Embodiment)

FIG. 4 shows a second embodiment.

According to this, the surface 9 of one film material 5 is entirely flat, that is, its surface 9a and the general surface 9
b is flush with the surface, and the titanium oxide film 14 is coated only on the general surface 9b excluding the surface 9a of the edge portion 11.

According to this, the shaving operation by the buff or the like described above is unnecessary, and the molding of the antifouling film material 2 is facilitated accordingly.

Since other structures and operations are the same as those of the first embodiment, the same reference numerals are given to the drawings and the duplicated description will be omitted.

[0048]

The effects of the present invention are as follows.

According to the first aspect of the present invention, a plurality of heat-meltable resin film materials are provided side by side, and the surface of one edge of one of the adjacent edges of the two adjacent film materials is opposed to each other. The edges of the two film materials are overlapped with each other so that the back surface of the edge of the other film material facing the edge is joined, and the surface of the edge material is removed from the surface of the one film material. The surface is coated with a titanium oxide film, and the surface of the other film material is coated with a titanium oxide film, and the two edges are thermally welded to each other at an intermediate portion in the width direction of the overlapping portion of the two edges. Have been.

For this reason, the titanium oxide film coated on the surface of each of the above-mentioned film materials acts as a photocatalyst, thereby preventing the surface of each of the above-mentioned film materials from being stained. It is also prevented that an organic substance such as mold is generated in the gap between the other film material facing the edge and the edge of the edge.

Accordingly, it is possible to prevent a black line due to the organic substance from appearing along the joint between the respective edges of the film materials, and thus the appearance of the film structure can be kept good. .

In the above case, of the surface of the edge of one film material and the back surface of the edge of the other film material to be joined to each other, the surface of the edge of the one film material is coated with titanium oxide. Because the film is not coated, the thermal welding of these two edges is
This can be surely performed without being disturbed by the titanium oxide film which is hard to melt by heat.

Therefore, even when the good appearance is maintained as described above, the bonding strength due to the thermal welding between the two film materials is sufficiently secured, that is, the strength of the film structure is sufficiently secured. .

According to a second aspect of the present invention, the edge of the titanium oxide film on the edge portion side of the one film material is opposed to the edge of the back surface of the edge portion of the other film material. The edge of the titanium oxide film enters the gap.

Therefore, the organic matter to be generated in the gap is decomposed by the action of the photocatalyst on the edge of the titanium oxide film, that is, the generation of the organic matter in the gap is more reliably prevented. The appearance of the structure is more reliably kept good.

According to a third aspect of the present invention, there is provided a stepped surface in which the surface of the edge of the one film material in the heat-welded portion of the both edges is lowered stepwise from the general surface of the one film material. It has been.

For this reason, when the edge of the other film is closely adhered to the step surface on the lower side, which is the surface of the edge of the one film, and thermally welded, the edge of the other film is formed. A part is pressed against the edge on the edge side of the general surface of the one film material, and the edge of the edge of the other film material is bent outward, whereby the film material The edge of the edge part is separated from the titanium oxide film coated on the general surface of the one film material, so that the width of the gap is increased.

Therefore, while the other film material is made of resin and is an organic material, the edge of the other film material is in close contact with the titanium oxide film coated on the general surface of the one film material. The decomposition of the titanium oxide film by the action of the photocatalyst is suppressed.

As a result, the edge of the edge portion of the other film material is a portion that is easily visible in appearance, but is kept in its initial shape. Appearance is kept good.

According to a fourth aspect of the present invention, the film material is transparent, and the following effects are produced.

That is, as described above, when the film material is transparent, the ultraviolet light of the light passes through the film material at the joint between the edges of the film materials and the edge of the film material is connected to each other. Although the contact portion is reached, the titanium oxide film does not exist in the contact portion as described above, so that the edge of the film material is prevented from being decomposed by the titanium oxide film.

Therefore, even when the film material is transparent and light is introduced into the film structure, the bonding strength of the film materials due to thermal welding can be reduced with time. When prevented, this bond strength is sufficiently ensured, which is beneficial for the life.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along line 1-1 of FIG. 2 in a first embodiment.

FIG. 2 is a perspective view of a membrane structure that is a tent according to the first embodiment.

FIG. 3 is a developed view of the first embodiment shown in FIG. 1;

FIG. 4 is a diagram corresponding to FIG. 3 in a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Membrane structure 2, 3 Antifouling membrane material 5, 6 Membrane material 9 Surface 9a Surface 9b General surface 10 Back surface 10a Back surface 11 Edge 14 Titanium oxide film 14a Edge 15 Gap A Thermal welding

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toru Kawamura 3-20 Sumida, Hirakata-shi, Osaka Taiyo Kogyo Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04H 15/54 D06H 5 / 00 B29C 65/02

Claims (4)

(57) [Claims] 1. A plurality of heat-meltable resin film materials are provided side by side, and, of each of opposing edges of both film materials adjacent to each other, a surface of one of the film materials is provided on the surface of the edge of the film material. The respective edges of the two film materials are overlapped with each other so that the back surfaces of the edges of the other film material facing each other are joined together, and a titanium oxide film is formed on the general surface obtained by removing the surface of the edge material from the surface of the one film material. And a titanium oxide film is coated on the surface of the other film material, and the two edges are thermally welded to each other at a halfway portion in the width direction of the overlapping portion of the two edges. Structure of the joint between the antifouling membrane materials. 2. The film structure according to claim 1, wherein an edge of said titanium oxide film on an edge portion side of said one film material faces an edge of a back surface of an edge portion of said another film material. Structure of the joint between the antifouling membrane materials. 3. The surface of the edge portion of the one film material at the heat-welded portions of the both edge portions is a step surface which is stepped down from the general surface of the one film material. 3. A structure of a joint between antifouling membrane materials in the membrane structure according to 2. 4. The method according to claim 1, wherein the film material is transparent.
The joint structure between the antifouling membrane materials in the membrane structure according to any one of the above.