JP7379106B2 - Sheet fixing structure - Google Patents

Description

The present invention relates to a sheet fixing structure for fixing a sheet in a membrane structure building such as an air dome or a tent when the sheet member is used to assemble the building.

Conventionally, there has been known a sheet fixing structure in which the edge of the sheet member is locked to a fixing member placed at a predetermined position on the building, etc. when fixing the sheet member in the assembly of a membrane structure building, etc. (For example, see Patent Document 1).

The sheet fixing structure of Patent Document 1 includes a sheet member having a plurality of membrane bodies, a fixing member fixed to a fixing body for fixing the sheet member, and a pressing member that sandwiches the sheet member between the fixing member and the fixing member. , is provided. The plurality of membrane bodies are fixed to each other in a laminated state at their peripheral edges. The sheet member configured in this manner is inflated by filling gas such as air between each membrane body.

Japanese Patent Application Publication No. 2012-172374

In the sheet fixing structure of Patent Document 1, since snow tends to adhere to the pressing member, a large amount of snow tends to accumulate on the pressing member. When a large amount of snow accumulates on the holding member, a large amount of snow will also reach the part of the sheet member adjacent to the holding member, causing the shape of the gas-filled sheet member to collapse or the large amount of snow to fall on the sheet member. There is a problem that it becomes easy to fall from the member.

Therefore, the present invention has been made based on the above-mentioned problem, and an object of the present invention is to provide a sheet fixing structure to which snow is less likely to adhere.

The sheet fixing device according to the present invention includes a sheet member, a fixing member configured to be fixed to a fixing body, and a pressing member arranged to sandwich an edge of the sheet member between the fixing member and the fixing member. and a protective film that covers the upper surface of the pressing member, and a bolt that fixes the protective film and the pressing member to the fixing member . The protective film is made of fluororesin.

According to this configuration, since the protective film is made of fluororesin, it has a low coefficient of friction and high slipperiness. Therefore, snow that has accumulated on the protective film is less likely to adhere to the protective film, and therefore a large amount of snow is prevented from accumulating on the protective film. As a result, a large amount of snow is prevented from reaching the portion of the sheet member adjacent to the pressing member, and therefore, the sheet member is prevented from losing its shape and a large amount of snow is prevented from falling from the sheet member.

In the above configuration, the upper surface of the pressing member may be inclined downwardly toward the outside. The protective film may be attached to the upper surface of the pressing member along the upper surface of the pressing member.

According to this configuration, the protective film is attached to the upper surface of the pressing member along the upper surface of the pressing member, so that the upper surface of the protective film is inclined downwardly toward the outside. Therefore, the snow that has accumulated on the protective film becomes easier to slide on the upper surface of the protective film toward the outside due to gravity, so that a large amount of snow is further suppressed from accumulating on the protective film.
The bolt may be attached to a rubber member, and the rubber member may cover a head of the bolt.

According to the present invention, it is possible to provide a sheet fixing structure to which snow is difficult to adhere.

1 is a diagram schematically showing a structure to which the sheet fixing structure according to the present embodiment is applied. It is a figure for explaining the arrangement state of a sheet member. FIG. 3 is a longitudinal cross-sectional view showing the sheet fixing structure. FIG. 3 is an exploded view showing the sheet fixing structure.

Hereinafter, a sheet fixing structure according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view schematically showing an example of a structure to which the sheet fixing structure of this embodiment is applied.

The sheet fixing structure according to the present embodiment is a structure for fixing a sheet member 30 to a support member 10 of a structure, and the sheet member 30 and a fixing member 220 to which this sheet member 30 is fixed are attached to the support member 10. A sheet fixing device 20 for fixing the sheet is provided.

The structure includes a plurality of (three in this embodiment) support members (fixed bodies) 10 arranged at predetermined intervals. The support member 10 includes a horizontal plate 10a that extends horizontally and perpendicular to the direction in which the support members 10 are lined up, and a predetermined area below the horizontal plate 10a in the direction in which the horizontal plate 10a extends in order to support the horizontal plate 10a. It has pillars 10b, 10b, . . . arranged at intervals. A sheet fixing device 20 is arranged on this horizontal plate 10a, and the sheet members 30, 30 on both sides are fixed to the support member 10 by this sheet fixing device 20.

As shown in FIGS. 1 and 2, each sheet member 30 includes a plurality of membrane bodies 32a, 32b, and 34a, which are parts for configuring the roof or outer wall of a structure. Each sheet member 30 has a sheet main body 32 composed of a membrane body 32a and a membrane body 32b, and a connecting portion 34 composed of a membrane body 34a coupled to the sheet body 32. The sheet main body 32 mainly exists outside the sheet fixing device 20 (in FIG. 1, between the supporting members 10), and includes a sheet main body part 36b and a fixing part 36a. Specifically, in this sheet body 32, a fixed portion 36a is formed by fixing the peripheral edges of the plurality of membrane bodies 32a, 32b to each other in a laminated state. Further, a portion of the seat body 32 that is inside the fixed portion 36a constitutes a seat body portion 36b. In this sheet body portion 36b, the membrane bodies 32a and 32b are arranged in the stacking direction in a state where they are not fixed to each other (separated or separable). The space between each membrane body (for example, between the membrane bodies 32a and 32b) is airtight. This sheet main body 32 has a shape in which a fluid (air in this embodiment) is filled between the laminated membrane bodies 32a and 32b, so that the central portion bulges in the thickness direction of the sheet member 30.

The connecting portion 34 is a portion connected to the peripheral edge of the sheet body 32 and is located inside the sheet fixing device 20 . One end 34b of the connecting portion 34 is overlapped with and fixed to the ends of the membrane bodies 32a, 32b constituting the seat body 32. That is, the sheet member 30 has a fixed portion 36a to which the film bodies 32a, 32b of the sheet main body 32 and the film body 34a of the connecting portion 34 are fixed. In this embodiment, the sheet member 30 has three membrane bodies 32a, 32b, and 34a, two of which constitute the sheet body 32, and one membrane body 34a constitutes the connection portion 34. are doing. In the fixed portion 36a, the membrane bodies 32a, 32b, and 34a are fixed to each other by thermal welding, adhesive bonding, or double-sided tape in areas where strength is not required.

The membrane bodies 32a, 32b, and 34a are constructed of thin resin members that do not have a fiber fabric serving as a core material. For example, specifically, the membrane bodies 32a, 32b, and 34a are formed of synthetic resin such as fluororesin, polyvinyl chloride resin, and polyethylene resin. That is, the membrane bodies 32a, 32b, and 34a have a strength that can withstand the tension generated when the seat body 32 is filled with air. Note that the membrane bodies 32a, 32b, and 34a are not limited to resin members that do not have a fiber fabric serving as a core material, but may be made of at least one of the core materials formed of a fiber fabric (fiber woven fabric, knitted fabric, etc.). It may be constituted by a member whose surface is coated with the above synthetic resin. The membrane bodies 32a, 32b, and 34a of this embodiment are formed of, for example, a fluororesin, and a tetrafluoroethylene-ethylene copolymer (ETFE) is used as the fluororesin, and are square in size, for example, 4 x 4 m. , the thickness is, for example, 50 to 500 μm.

Such an edge of the sheet member 30 constitutes a held portion 33 that is held by the locking member 210. The held portion 33 is configured to have a larger thickness (the dimension in the vertical direction in FIG. 2) than a portion of the seat body 32 adjacent to the held portion 33. Specifically, the held portion 33 of this embodiment is one of the membrane bodies 32a and 32b laminated to form the sheet main body 32 (in the example shown in FIG. 2, the lower It is formed by folding back the end portion of the membrane body 32a) so as to enclose the elongated core material 38 therein. The tip of the folded portion of the film body 32a is fixed in a stacked state with the other film bodies 32b and 34a at a fixed portion 36a.

The connecting portion 34 of one sheet member 30 is connected to the connecting portion 34 of the other sheet member 30. That is, the connecting portion 34 of one sheet member 30 extends toward the connecting portion 34 of the other sheet member 30. One end 34b of the connecting portion 34 of one sheet member 30 is fixed to the membrane bodies 32a, 32b of the sheet main body 32 at the fixing portion 36a as described above, and the other end 34c is fixed to the connecting portion 34 of the other sheet member 30. It is overlapped with the other end 34c. In this embodiment, the other ends 34c, 34c of the connecting portion 34 are fixed to each other with double-sided tape 39, but the present invention is not limited thereto.

FIG. 3 is a longitudinal sectional view showing the sheet fixing structure of this embodiment, and FIG. 4 is an exploded view thereof.

The sheet fixing device 20 in the sheet fixing structure of the present embodiment includes a locking member 210 that holds the edge (held portion 33) of the sheet member 30, a fixing member 220 fixed to the support member 10, and this fixing member. 220 , and a protective film 240 that covers the upper surface 23 a of the presser member 230 .

The locking member 210 extends along the held portion 33 of the sheet member 30 and includes a main body portion 211 into which the held portion 33 can be inserted, and a locked piece 212 that protrudes from the main body portion 211. , is arranged in a space (locking member accommodation space) S1 formed between the fixing member 220 and the pressing member 230.

The main body part 211 is provided with a notch part 213 through which the sheet member 30 extending from the held part 33 inserted into the main body part 211 is inserted, and between this notch part 213 and the locked piece 212. It has a support surface part 214.

The notch portion 213 is a portion that connects the space S2 inside the main body portion 211 (held part accommodation space) with the space outside the main body portion 211. The cutout portion 213 is formed throughout the main body portion 211 in the length direction. The interval between the parts of the notch 213 through which the sheet member 30 passes is smaller than the diameter of the core material 38 of the held part 33.

The outer surface 214a of the support surface portion 214 has a curved shape that bulges outward. Specifically, the outer surface 214a of the support surface portion 214 is a curved surface whose cross section perpendicular to the longitudinal direction of the main body portion 211 forms an arc that bulges outward.

The locked piece 212 is provided on the opposite side of the main body 211 with the notch 213 and the held part housing space S2 interposed therebetween. When the locking member 210 is rotated in the locking member housing space S1 so that the support surface portion 214 is along the receiving surface 222 of the fixing member 220, the locking piece 212 is formed at the locking portion of the fixing member 220. 224. The locked piece 212 of this embodiment is formed over the entire length of the main body portion 211 .

Note that the locking member 210 is not limited to the above configuration as long as the held portion 33 of the sheet member 30 can be inserted into the held portion accommodation space S2. The locking member 210 may be integrally coupled to the fixing member 220, for example.

The fixing member 220 has a shape extending in one direction (the direction along the held portion 33 of the sheet member 30). This fixing member 220 is provided between thick portions 220a, 220a on both sides, a protruding portion 220b in the center, and between the thick portion 220a and the protruding portion 220b in a cross section perpendicular to the one direction. Attachment recesses 221, 221 are provided.

The protruding portion 220b is provided with a female threaded hole portion 220c into which a bolt B2 for fixing the holding member 230 to the fixing member 220 is screwed.

The thick portion 220a is provided with a bolt receiving portion 220d for receiving a bolt B1 for fixing the fixing member 220 to the support member 10 (horizontal plate 10a). An inclined sheet receiving surface 225 is formed at the end of the thick portion 220a on the opposite side from the support member 10. This seat receiving surface 225 is formed outside the attachment recess 221 in the width direction of the fixing member 220. The sheet receiving surface 225 has a width larger than the width of the fixed portion 36a in the width direction of the fixed member 220. Thereby, the sheet receiving surface 225 can sandwich a predetermined range of the sheet member 30 including the fixed portion 36a between the sheet receiving surface 225 and the pressing member 230. Further, the seat receiving surface 225 is inclined outward in a direction away from the support member 10 (for example, in a direction that becomes higher toward the outside in FIG. 3). The fixing member 220 of this embodiment has a waterproof member 226 disposed on the sheet receiving surface 225 and along the sheet receiving surface 225. The surface of this waterproof member 226 (the surface opposite to the fixing member 220) is approximately parallel to the sheet receiving surface 225. Then, the sheet member 30 extending from the held portion 33 inserted into the locking member 210 is arranged on this waterproof member 226. At this time, the fixed portion 36a of the sheet member 30 is located inside the outer end of the waterproof member 226 in the width direction of the fixed member 220. The waterproof member 226 of this embodiment is made of rubber.

The attachment recess 221 extends along the held portion 33 of the sheet member 30, and is a portion into which the locking member 210 is inserted. This mounting recess 221 forms a space (locking member accommodating space) S1 between it and the holding member 230. The mounting recess 221 has a receiving surface 222 facing the locking member storage space S1, and the receiving surface 222 is formed to be continuous with a surface 227 extending substantially perpendicularly from the inner end of the sheet receiving surface 225. . The upper side of this substantially vertically extending surface 227 is slightly inclined toward the outside in the width direction of the fixing member 220 (toward the adjacent sheet receiving surface 225 side).

The receiving surface 222 is a surface that receives a force from the supporting surface section 214 that is applied by the tension T of the sheet member 30, and has a concave curved shape. Specifically, the receiving surface 222 has a curved shape corresponding to the outer surface 214a of the supporting surface portion 214 of the locking member 210, and is disposed within the locking member housing space S1 (that is, inserted into the mounting recess 221). and) is in surface contact with the outer surface 214a of the support surface portion 214 of the locking member 210. Therefore, the support surface portion 214 can be rotated along the receiving surface 222, and thereby the locking member 210 can be rotated at the fixed position on the fixing member 220.

Furthermore, the mounting recess 221 has a side surface 223 (side surface of the protruding portion 220b) that is provided on the opposite side of the receiving surface 222 with the locking member 210 in between and faces the locking member housing space S1. A locking portion 224 projects from this side surface 223 toward the main body portion 211 of the locking member 210 . This locking portion 224 is a portion for locking the locked piece 212 as described above. Specifically, the locking portion 224 is brought into contact with the locked piece 212 by rotating the locking member 210 disposed in the locking member storage space S1 so that the support surface portion 214 follows the receiving surface 222. It has a contact surface 224a. For example, when the fixing member 220 is fixed to the support member 10 in the posture shown in FIG. There is.

By inserting the locking member 210 into such a mounting recess 221, the locking member 210 is fixed to the fixing member 220. Specifically, when the outer surface 214a of the support surface portion 214 is in surface contact with the receiving surface 222 and the locked piece 212 is locked (in contact with) the locking portion 224, the mounting recess 221 of the fixing member 220 is opened. By arranging the locking member 210 within, the locking member 210 is fixed to the fixing member 220.

The fixing member 220 configured as described above is fixed to the horizontal plate 10a of the support member 10 by bolts B1.

The holding member 230 holds the sheet member 30 between the holding member 230 and the fixing member 220. The pressing member 230 of this embodiment is a plate-shaped member that extends along the fixing member 220. The upper surface 230a of this pressing member 230 is formed to be inclined downward toward the outside in the width direction of the pressing member 230. A sheet pressing surface 232, which is an inclined surface corresponding to the sheet receiving surface 225 of the securing member 220, is formed on both widthwise sides of a back surface 231 (a surface facing the securing member 220) of the pressing member 230. A sheet member 30 extending from the locking member 210 is arranged between the sheet pressing surface 232 of the holding member 230 and the sheet receiving surface 225 of the fixing member 220. In other words, the sheet member 30 extending from the held portion 33 is pressed toward the sheet receiving surface 225 by the sheet pressing surface 232 . In the present embodiment, the waterproof cover 233 is placed on top of the fixing member 220 (on the presser member 230 side) with the locking member 210 and the sheet member 30 placed thereon, and the presser member 230 is attached to the fixing member 220. A sheet member 30 is sandwiched between them. Thereby, the sheet member 30 extending from the locking member 210 is held between the waterproof member 226 and the waterproof cover 233. This waterproof cover 233 is made of rubber similarly to the waterproof member 226. Therefore, by sandwiching the sheet member 30 between the waterproof cover 23 and the waterproof member 226 in close contact with the sheet member 30, even if rainwater or the like flows along the sheet main body 32, it will not flow into the sheet fixing device 20. This can prevent the infiltration of rainwater, etc. This prevents the rainwater and the like from penetrating into the structure to which the sheet member 30 is fixed.

The fixed portion 36a of the sheet member 30 is located inside the sheet pressing surface 232 and the outer end of the waterproof cover 233 in the width direction of the holding member 230 (fixed member 220). Further, also in the fixing member 220 that sandwiches the sheet member 30 between the holding member 230 and the fixing member 230, the fixing portion 36a of the sheet member 30 is located inside the outer end of the fixing member 220. Therefore, the fixed portion 36a and the portions before and after the fixed portion 36a are sandwiched between the fixed member 220 and the pressing member 230 in the sheet member 30 extending from the locking member 210 housed in the locking member storage space S1. state. In the sheet member 30 in this embodiment, the fixed portion 36a does not come out from between the fixing member 220 and the pressing member 230 (to the outside in the width direction of the fixing member 22) when the sheet member 30 is extended by the tension T. It is formed in such a position. For example, in the present embodiment, in the width direction of the fixing member 220, the outer end of the fixing part 36a is located about 10 mm inside the outer ends of the fixing member 220 and the pressing member 230. In the present embodiment, the end of the waterproof member 226 of the fixing member 220 protrudes outward in the width direction more than the end of the sheet pressing surface 232 of the pressing member 230 (FIG. 3). reference).

The protective film 240 is made of fluororesin. Tetrafluoroethylene-ethylene copolymer (ETFE) is used as the fluororesin. Note that since the protective film 240 is not subjected to as much tension as the membrane bodies 32a, 32b, and 34a, it may have a lower strength than the membrane bodies 32a, 32b, and 34a. The protective film 240 is formed in a substantially rectangular shape that is elongated in the direction in which the fixing member 220 extends, and is configured to have a size that can cover the upper surface 230a of the pressing member 230. In this embodiment, the entire upper surface 230a of the pressing member 230 is covered with two protective films 240, 240, but how many protective films 240 can be used to cover the upper surface 230a of the pressing member 230? may be used.

The two protective films 240 are arranged such that the edge 240a of one protective film 240 and the edge 240a of the other protective film 240 are laminated at the center of the upper surface 230a of the presser member 230. 230 along the upper surface 230a. As a result, the upper surface of the protective film 240 is inclined downward toward the outer side of the pressing member 230 in the width direction. A bolt B2 attached to the rubber member 250 is screwed into the female screw hole 220c of the protruding portion 220b via the edges 240a, 240a of the two protective films 240 and the pressing member 230. Thereby, the holding member 230 is attached to the fixing member 220, and the protective film 240 is attached to the upper surface 230a of the holding member 230. Further, edge portions 240b of the two protective films 240 opposite to the laminated edge portion 240a are each welded to the membrane body 32b. The rubber member 250 includes a metal plate 260 embedded therein. This ensures the strength of the rubber member 250. In the present embodiment, the rubber member 250 is fitted into a downwardly recessed recess 230aa on the upper surface 230a of the pressing member 230, but the recess 230aa and the rubber member 250 may be omitted.

Next, the work of fixing the sheet member 30 to the support member 10 using the above-described sheet fixing structure will be described.

First, in a factory or the like, the edge 240b of the protective film 240 is welded to the membrane body 32b in advance.

Next, the fixing member 220 is attached on the horizontal plate 10a of the support member 10. Then, the held portion 33 of the sheet member 30 is inserted into the held portion accommodating space S2 of the locking member 210, and the sheet member 30 is held by the locking member 210. Next, the locking member 210 is inserted into the locking member housing space S1 of the fixing member 220. Next, while rotating the locking member 210 using the tension T of the sheet member 30, the locked piece 212 is brought into contact with the contact surface 224a of the locking portion 224, and the outer surface 214a of the support surface portion 214 is It is brought into contact along the receiving surface 222 of the fixing member 220 (see FIGS. 3 and 4). Thereby, the locking member 210 is fixed to the fixing member 220.

Next, the waterproof cover 233 and the pressing member 230 are sequentially placed over the fixing member 220.

In this state, the edges 240a, 240a of the two protective films 240, 240 are laminated to cover the upper surface 230a of the pressing member 230 with the protective film 240. Finally, the bolt B2 is screwed into the female screw hole 220c through the edges 240a of the two protective films 240, 240, the pressing member 230, and the waterproof cover 233 (see FIGS. 3 and 4). Thereby, the holding member 230 and the waterproof cover 233 are attached to the fixing member 220, and the protective film 240 is attached to the upper surface 230a of the holding member 230.

In the manner described above, the sheet member 30 is fixed to the support member 10. Then, air is filled between the membrane bodies 32a and 32b constituting the sheet main body 32 of the sheet member 30 to inflate the sheet member 30 and introduce tension to the membrane body.

According to the sheet fixing structure described above, the protective film 240 is made of fluororesin, so it has a low coefficient of friction and high slipperiness. Therefore, snow that has accumulated on the protective film 240 is difficult to adhere to the protective film 240, and a large amount of snow is difficult to accumulate on the protective film 240. As a result, a large amount of snow is prevented from reaching the portion of the sheet member 30 adjacent to the pressing member 230, so that the shape of the air-filled sheet member 30 may be distorted or a large amount of snow may fall from the sheet member 30. Things to do are suppressed.

According to the sheet fixing structure, the protective film 240 is attached to the upper surface 230a of the pressing member 230 along the upper surface 230a of the pressing member 230, so the upper surface of the protective film 240 is attached to the upper surface 230a of the pressing member 230 . The member 230 is inclined downward toward the outside in the width direction. Therefore, the snow that has accumulated on the protective film 240 easily slides outward on the upper surface of the protective film 240 due to gravity, so that a large amount of snow is prevented from accumulating on the protective film 240.

30 Sheet member 36a Edge 220 Fixing member 230 Pressing member 230a Top surface 240 Protective film

Claims (3)

a sheet member;
a fixing member configured to be fixed to the fixing body;
a pressing member arranged to sandwich an edge of the sheet member between the holding member and the fixing member;
a protective film that covers the upper surface of the pressing member;
A bolt for fixing the protective film and the pressing member to the fixing member ,
The protective film is formed of a fluororesin.
Sheet fixing structure. The upper surface of the pressing member is inclined downwardly toward the outside,
The protective film is attached to the upper surface of the pressing member along the upper surface of the pressing member.
The sheet fixing structure according to claim 1. The bolt is attached to a rubber member,
the rubber member covers the head of the bolt;
The sheet fixing structure according to claim 1.

Images