JP2022086259A - Windshield for bonfire - Google Patents

Abstract

To provide a windshield for bonfire enabling users to enjoy bonfire comfortably.SOLUTION: A windshield 1 for bonfire comprises: a rectangular first cloth 101; a triangular second cloth 102 being provided on a first lateral side 101a of the first cloth 101, and having a hypotenuse that moves away from the first lateral side 101a from an upper end to a lower end; a triangular third cloth 103 being provided on a second lateral side 101b opposite to the first lateral side 101a of the first cloth 101, and having a hypotenuse that moves away from the second lateral side 101b from the upper end to the lower end; a cylindrical first cylinder part 104 provided along the first lateral side 101a; and a cylindrical second cylinder part 105 provided along the second lateral side 101b. The first cloth 101, the second cloth 102, the third cloth 103, the first cylinder part 104, and the second cylinder part 105 are highly flame-retardant materials.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a bonfire windshield used outdoors.

Conventionally, a lightweight and inexpensive assembly-type windshield device has existed, but it has not been applicable to a bonfire having a high thermal power (Patent Document 1).

Japanese Unexamined Patent Publication No. 2002-42522

As the camp population grows, so does the number of people who bonfire. Under such circumstances, it is required to be able to bonfire more safely and comfortably. The cause of accidents and discomfort that occurs is that the smoke, odor, sparks, etc. generated by the bonfire are scattered and diffused by the wind. However, there is no product that actually suppresses this efficiently.

In recent years, the ease of transporting and installing camping equipment has become more important. A wood stove or the like can achieve the above purpose, but it is heavy and difficult to install and transport.

It is an object of the present disclosure to provide a bonfire windshield that is lightweight, easy to set up, and yet enables safe and comfortable bonfire enjoyment.

According to a certain aspect of the bonfire windshield of the present disclosure, a rectangular shaped first cloth and a triangle provided on the first side of the first cloth and having an inclined side that moves away from the first side from the upper end to the lower end. A triangular second cloth having a shape, and a triangular second side provided on the second side of the first cloth opposite to the first side and having an inclined side that moves away from the second side from the upper end to the lower end. The first cloth is provided with three cloths, a tubular first tubular portion provided along the first side side, and a tubular second tubular portion provided along the second side side. The second cloth, the third cloth, the first cylinder portion, and the second cylinder portion are made of highly flame-retardant materials.

In the bonfire windshield, the lengths of the first side side and the second side side of the first cloth are 40 cm or more and 60 cm or less.

In the bonfire windshield, the lower side of the first cloth, the lower side of the second cloth, and the lower side of the third cloth are provided with notches extending upward.

In the above-mentioned bonfire windshield, the above-mentioned first cloth, the above-mentioned second cloth, the above-mentioned third cloth, the above-mentioned first cylinder portion and the above-mentioned second cylinder portion are composed of organic fibers.

In the above-mentioned windshield for bonfire, the above-mentioned organic fiber is composed of one or more kinds of fibers selected from polyphenylene sulfide fiber, PEEK fiber, meta-aramid fiber, para-aramid fiber, polybenzol fiber, and flame-resistant acrylic fiber.

In the bonfire windshield, the organic fiber is a polybenzoxazole (PBO) fiber.

According to the present disclosure, it is possible to provide a bonfire windshield that enables a comfortable enjoyment of a bonfire.

It is a perspective view from the front side of the bonfire windshield of Embodiment 1. FIG. It is a 1st development view of the windshield for a bonfire of Embodiment 1. FIG. It is a 2nd development view of the windshield for a bonfire of Embodiment 1. FIG. It is a figure which shows the flame retardant property of Zylon (registered trademark). It is a figure which shows the texture characteristic comparison of the woven fabric used for the bonfire windshield of Embodiment 1 and other woven fabrics. It is a figure which shows the LOI value of various cloths. It is a perspective view which shows the use state of the bonfire windshield of Embodiment 1. FIG. It is a perspective view from the front side of the bonfire windshield of Embodiment 2. It is a development view of the windshield for a bonfire of Embodiment 2. It is a side view of the use state of the bonfire windshield of Embodiment 2. It is a side view of another use state of the bonfire windshield of Embodiment 2.

The bonfire windshield of each embodiment based on the present disclosure will be described below with reference to the drawings. When the number, quantity, etc. are referred to in the embodiments described below, the scope of the present invention is not necessarily limited to the number, quantity, etc., unless otherwise specified. The same reference number may be assigned to the same part or equivalent part, and duplicate explanations may not be repeated. It is planned from the beginning to use the configurations in the embodiments in appropriate combinations.

[Embodiment 1: Windshield for bonfire 1]
With reference to FIG. 1, the configuration of the bonfire windshield 1 of the present embodiment will be described. FIG. 1 is a perspective view from the front side of the bonfire windshield 1.

The bonfire windshield 1 has a so-called jinmaku-type form as a whole. Specifically, it has a rectangular first cloth 101 and an inclined side provided on the first side side 101a (left side in the drawing) of the first cloth 101 and moving away from the first side side 101a from the upper end to the lower end. It is provided on the triangular second cloth 102 and the second side side 101b on the side opposite to the first side side 101a of the first cloth 101 (on the right side in the figure), and is provided from the second side side 101b from the upper end to the lower end. A triangular third cloth 103 having a distant diagonal side, a tubular first tubular portion 104 along the first side side 101a, and a tubular second tubular portion 105 provided along the second side side 101b. , Are provided.

A reinforcing hole 109 reinforced by eyelets or the like is provided at the tip portion of the triangular second cloth 102 at a position away from the first cloth 101. Similarly, a reinforcing hole 109 reinforced by eyelets or the like is provided at the tip portion of the triangular third cloth 103 at a position away from the first cloth 101. The reinforcing hole 109 reinforced by the eyelet or the like is also used when installing the bonfire windshield 1, but the reinforcing hole 109 reinforced by the eyelet or the like is not necessarily an essential configuration, and various known members. Can be used.

The first woven fabric 101, the second woven fabric 102, the third woven fabric 103, the first tubular portion 104, and the second tubular portion 105 are made of highly flame-retardant materials. The specific materials used for each fabric will be described later.

When installing the bonfire windshield 1 having the above configuration on the ground, the support rod B1 is passed through the first cylinder portion 104, and similarly, the support rod B1 is passed through the second cylinder portion 105. The lower end of the support rod B1 is driven into the ground so that the first fabric 101 is in a pulled state, one end of the rope N1 is fixed to the upper end of the support rod B1, and the other end of the rope N1 is used with the peg P1. And fix it to the ground.

On the other hand, one end of the rope N1 is fixed to the reinforcing hole 109 of the triangular second cloth 102, and the other end of the rope N1 is fixed to the ground by using the peg P1 so that the second cloth 102 is pulled. Similarly, one end of the rope N1 is fixed to the reinforcing hole 109 of the triangular third cloth 103, and the other end of the rope N1 is fixed to the ground by using the peg P1 so that the third cloth 103 is pulled. At this time, the positions of the second cloth 102 and the third cloth 103 are adjusted so as to surround the bonfire table to be used (see FIG. 7).

The size and manufacturing method of the bonfire windshield 1 will be described with reference to FIGS. 2 and 3. 2 and 3 are first and second developed views of the bonfire windshield 1. With reference to FIG. 2, the height (H) of the first fabric 101 is about 60 cm, and the width (W1) is about 60 cm. The height (H) of the second fabric 102 is about 60 cm, and the width of the base (W2) is about 40 cm. The height (H) of the third fabric 103 is about 60 cm, and the width of the base (W2) is about 40 cm. The outer diameters of the first cylinder portion 104 and the second cylinder portion 105 are about 2.5 cm.

Although the above dimensions are an example, since the bonfire windshield 1 of the present embodiment uses a very flame-retardant cloth described later, the bonfire stand is installed close to the bonfire windshield 1. can do. As a result, the size of the bonfire windshield 1 can be reduced. For example, the height (H) of the first fabric 101 can be reduced to about 40 cm, and the width (W1) can be reduced to about 40 cm.

With reference to FIG. 3, when manufacturing the windshield 1 for bonfire, a triangular cloth is cut out from one side of one rectangular cloth to form a second cloth 102, and the second cloth 102 is made of a rectangular cloth. By attaching to the other side, the first cloth 101, the second cloth 102, the third cloth 103, the first cylinder portion 104, and the second cylinder portion 105 are formed from one rectangular cloth. For example, when the width of the original fabric is 1200 mm, the first cloth 101 (W1 = 600 mm), the second cloth 102 (W2 = 400 mm), the third cloth 103 (W2 = 400 mm), and the first cylinder portion 104 (S1 =). 80 mm) and the second tubular portion 105 (S1 = 80 mm) can be cut out. This makes it possible to eliminate the surplus fabric and suppress an increase in the manufacturing cost of the bonfire windshield 1.

(Material of fabric)
With reference to FIG. 4, the material of the highly flame-retardant fabric used for the first fabric 101, the second fabric 102, the third fabric 103, the first cylinder portion 104, and the second cylinder portion 105 will be described. The material of the side fabric used in this embodiment is polybenzol fiber (PBO fiber) (trade name "Zylon (registered trademark)").

As shown in FIG. 4, Zylon® fibers exhibit very high flame retardancy. The combustion test based on JIS L1091 (A-vertical method) also shows a very small carbonization length and remaining dust time.

Polybenzol fiber refers to a fiber made of a polybenzazole polymer, and polybenzazole (hereinafter, also referred to as PBZ) refers to polybenzoxazole (hereinafter, also referred to as PBO) and polybenzothiazole (hereinafter, also referred to as PBT). , Or one or more polymers selected from polybenzimidazole (hereinafter, also referred to as PBI).

In the present disclosure, PBO refers to a polymer containing an oxazole ring bonded to an aromatic group, and the aromatic group does not necessarily have to be a benzene ring, and may be a biphenylene group, a naphthylene group, or the like. Furthermore, PBO is not only a homopolymer of poly (p-phenylene benzobisoxazole), but also a copolymer in which a part of the phenylene group of poly (p-phenylene benzobisoxazole) is replaced with a heterocycle such as a pyridine ring, and aromatics. Polymers consisting of a plurality of units of oxazole rings bonded to a group are widely included. This also applies to PBT and PBI. Also included are mixtures of two or more of PBO, PBT and PBI, two or more block or random copolymers of PBO, PBT and PBI and mixtures, copolymers, block polymers of these polybenzazole polymers. ..

The structural unit contained in the PBZ polymer is preferably selected from a lyotropic liquid crystal polymer that forms a liquid crystal at a specific concentration. The polymer is composed of the monomer units represented by the following structural formulas (a) to (h), and preferably is essentially composed of the monomer units selected from the structural formulas (a) to (d). Is. Further, these monomer units may partially contain a monomer unit having a substituent such as an alkyl group or a halogen group.

Suitable solvents for forming the polymer dope include cresol and non-oxidizing acids capable of dissolving the polymer. Examples of suitable acid solvents include polyphosphoric acid, methanesulfonic acid and high concentrations of sulfuric acid or mixtures thereof. More suitable solvents are polyphosphoric acid and methanesulfonic acid. The most suitable solvent is polyphosphoric acid.

The polymer concentration in the dope is preferably at least about 7% by weight, more preferably at least 10% by weight, and particularly preferably at least 14% by weight. The maximum concentration is limited by practical handling, such as polymer solubility and dope viscosity. Due to these limiting factors, the polymer concentration usually does not exceed 20% by weight.

In the present disclosure, suitable polymers or copolymers and dope are synthesized by known methods. For example, Wolfe et al., US Pat. No. 4,533,693 (1985.8.6), Sibert et al., US Pat. No. 4,772,678 (1988.9.22), Harris, US Pat. No. 4,847,350 (July 11, 1989) or Gregory et al., US Pat. No. 5,089,591 (1992.2.18). In summary, suitable monomers are temperatureed in a non-oxidizing, dehydrating acid solution in a non-oxidizing atmosphere at high speed stirring and high shear conditions at a stepwise or constant heating rate from about 60 ° C to 230 ° C. You can make it react by raising it.

The spun yarn requires a draw zone length of sufficient length to obtain a sufficient draw ratio (SDR), and is rectified at a relatively high temperature (above the dope solidification temperature and below the spinning temperature). It is desirable that the temperature is uniformly cooled by the cooling air. The length (L) of the draw zone needs to be long enough to complete solidification in a non-coagulable gas, and is determined by the single-hole discharge amount (Q). In order to obtain good fiber physical characteristics, the draw zone extraction stress needs to be 1.8 g / dtex or more in terms of polymer (assuming that stress is applied only to the polymer).

The threads stretched in the draw zone are then guided to a medium bath for solvent extraction and thread coagulation. As the extraction (coagulation) medium used in the extraction (coagulation) bath, a liquid having a hydroxyl group in the molecule, that is, water, methanol, ethanol, ethylene glycol and a solution prepared by mixing these with phosphoric acid is preferable and more preferable. Is water or an aqueous solution of phosphoric acid.

The phosphoric acid concentration in the case of an aqueous phosphoric acid solution is preferably 5% by mass or more and 60% by mass or less, more preferably 10% by mass or more and 50% by mass or less, and most preferably 20% by mass or more and 40% by mass or less. Further, the region preferable for the solidification temperature is 5 ° C. or higher and 60 ° C. or lower, more preferably 10 ° C. or higher and 50 ° C. or lower, and most preferably 15 ° C. or higher and 40 ° C. or lower.

After passing through the first extraction (coagulation) bath, the mixture is further neutralized with an aqueous solution of sodium hydroxide or the like, and the phosphoric acid contained in the fibers (threads) is extracted through a washing step such as the second extraction bath. Finally, in the extraction bath, the phosphoric acid contained in the yarn is extracted so as to be 1.0% by mass or less, preferably 0.5% by mass or less.

The liquid used as the extraction medium in the present disclosure is not particularly limited, but water, methanol, ethanol, acetone, ethylene glycol, etc., which are substantially incompatible with polybenzazole, are preferable, and a phosphoric acid aqueous solution or water is preferable. More preferred. The extraction (coagulation) bath may be separated in multiple stages, the concentration of the phosphoric acid aqueous solution may be gradually reduced, and finally washed with water. By these extraction treatments, the phosphorus atom content in the fiber is usually reduced to about 10,000 to 2000 ppm.

Finally, the water content in the fiber is dried to 2% or less through the drying step. For the drying method, select a general roller drying method or a method of leaving it in the oven. For the purpose of improving the fiber elastic modulus, heat treatment may be performed at 400 ° C. or higher under tension, if necessary.

(Texture characteristics)
Next, with reference to FIG. 5, the texture characteristics of the fabrics used for the first fabric 101, the second fabric 102, the third fabric 103, the first cylinder portion 104, and the second cylinder portion 105 will be described. FIG. 5 is a diagram showing the results of comparing the texture characteristics of the woven fabric used for the bonfire windshield 1 with other woven fabrics.

The "weight (absolute dry mass)" of the fabric used in this embodiment is preferably 100 to 1200 g / m ² , and more preferably 150 to 800 g / m ² . In this embodiment, 320 g / m ² was used.

The "thickness" of the fabric used in this embodiment is preferably 0.1 to 3.5 mm, more preferably 0.2 to 2.5 mm. In this embodiment, 0.5 mm was used. The method for measuring "thickness" is based on JIS L1096.

As the cloth used in this embodiment, a spun yarn woven fabric was used instead of a filament woven fabric. Zylon (registered trademark) woven fabrics include filament woven fabrics and spun yarn woven fabrics, but spun yarn woven fabrics were used because they "soften the texture" and "easily give thickness even with the same texture". As a result, it is possible to suppress ventilation while maintaining the texture.

As shown in FIG. 5, "glass fiber", "silicon coated glass fiber" and "polyester woven fabric (work clothes)" were used as samples to be compared with Zylon (registered trademark) cloth. Here, the "polyester woven fabric (work clothes)" is a blend of 65% PET and 35% cotton.

As comparison parameters, the "average coefficient of friction", "thickness (mm)", "grain (g / m ² )", and "thermal conductivity (W / mk)" of each sample were compared.

The "average coefficient of friction" was measured using a KES-SE friction feeling tester manufactured by Kato Tech Co., Ltd. under the following conditions. Cut the sample to a length of 5 cm or more and a width of 5 cm or more, measure the vertical direction and the horizontal direction 5 times each with standard sensitivity, standard friction element (1 mm square piano wire sensor), load 50 gf, and test speed 1 mm / cm. The average value in the horizontal direction was calculated.

"Thermal conductivity (W / mk)" was measured as follows using KES-FB7 and Thermolab II of Katou Tech Co., Ltd. Sample under the measurement conditions of ambient environment 20 ° C 65% RH, hot plate temperature (BT-Box) 35 ° C, sample table (thermocool) temperature 20 ° C (ΔT: 15 ° C), and contact load 6 g / cm ² (standard). Was placed on a thermocool, a thermolab hot plate was placed on the sample, and the power consumption of the thermolab hot plate after 10 minutes was measured three times, and the average value was calculated. The thickness of the sample required for calculating the thermal conductivity was measured with a load of 6 g / cm ² (calculated by BT-Box weight).

When used as a windshield for bonfire, the bonfire is concentrated and becomes high heat, and in order to prevent the surface temperature from reaching the thermal decomposition temperature or the ignition point, it is desirable to diffuse the heat quickly, so thermal conductivity. It is preferable that (W / mk) is high and heat transfer is fast.

Glass fiber "pricks" when touched, so coating is essential to improve the feel. When a heavy glass fiber having a specific gravity of more than 2 is coated with silicon, the basis weight becomes high and the weight of the cloth becomes heavy. Furthermore, coating rigid glass fiber gives it a firm texture.

As shown in FIG. 5, as a result of comparing the samples, it was confirmed that the Zylon (registered trademark) fabric had a texture equal to or higher than that of clothing, the thinnest thickness, the lightest basis weight, and the fastest heat transfer. did it.

[Flame retardant (LOI value)]
The flame retardancy of each fiber will be described with reference to FIG. The LOI value is the limit oxygen index, and can be measured by the combustibility test method of a polymer material according to the JISK7201-1995 oxygen index method. The larger the LOI value, the better the flame retardancy. JISL1091 method Judgment was made according to the combustion test (B method) of textile products.

As shown in FIG. 6, it can be seen that the PBO fiber has a large LOI value and is excellent in flame retardancy as compared with other fibers.

In the bonfire windshield 1 of the present embodiment, PBO fiber is used as a preferred fabric having high flame retardancy. However, as another cloth, one or more fibers selected from polyphenylene sulfide fibers, PEEK fibers, meta-aramid fibers, para-aramid fibers, PBO fibers, and flame-resistant acrylic fibers composed of organic fibers may be used.

(Usage pattern)
A usage pattern of the bonfire windshield 1 will be described with reference to FIG. 7. FIG. 7 is a perspective view showing a usage pattern of the bonfire windshield 1. As shown in FIG. 7, when the bonfire windshield 1 is used, the bonfire stand 200 is extremely used as the bonfire windshield 1 because the cloth having a very high flame retardancy is used as described above. Can be installed in close proximity.

As a result, the size of the bonfire windshield 1 can be reduced. This makes it possible to provide a bonfire windshield 1 that is compact, easy to transport, and easy to install, and makes it possible to comfortably enjoy the bonfire when performing the bonfire.

[Embodiment 2: Windshield for bonfire 1A]
Next, the bonfire windshield 1A of the second embodiment will be described with reference to FIGS. 8 to 10. 8 is a perspective view from the front side of the bonfire windshield 1A, FIG. 9 is a developed view of the bonfire windshield 1A, and FIG. 10 is a side view of the bonfire windshield 1A in a used state.

The basic configuration of the bonfire windshield 1A of the present embodiment is the same as that of the bonfire windshield 1 of the first embodiment. The difference is that the bonfire windshield 1A has notches extending upward in the lower side of the first cloth 101, the lower side of the second cloth 102, and the lower side of the third cloth 103, as often shown in FIGS. 8 and 9. 101s, 102s, 103s are provided in the vicinity of the first cylinder portion 104 and the second cylinder portion 105. The notches 101s, 102s, 103s of the present embodiment are provided at two places on the lower side of the first cloth 101, one place on the lower side of the second cloth 102, and one place on the lower side of the third cloth 103, for a total of four places. .. This quantity can be changed as appropriate. In the present embodiment, the shape of each notch has the shape of an isosceles triangle, but the shape of the notch is not limited to this shape, and the tension acting in the horizontal direction can be relaxed. It may be in shape.

Further, a first double structure 102h is provided in which a part of the corner portion of the second cloth 102 opposite to the first cloth 101 is folded back toward the first cloth 101 side to improve the strength of the tip portion. ing. The first annular member 102r is provided in the portion of the first double structure 102h.

Similarly, a second double structure 103h is provided in which a part of the corner portion of the third fabric 103 opposite to the first fabric 101 is folded back toward the first fabric 101 to improve the strength of the tip portion. I'm letting you. A second annular member 103r is provided in the portion of the second double structure 103h.

Further, a first reinforcing hole 104h reinforced by eyelets or the like is provided at the upper end of the first cylinder portion 104, and a third annular member 104r is provided at the lower end of the first cylinder portion 104. Similarly, a second reinforcing hole 105h reinforced by eyelets or the like is provided at the upper end of the second tubular portion 105, and a fourth annular member 105r is provided at the lower end of the second tubular portion 105.

As shown in FIG. 9, in the bonfire windshield 1A having the above configuration, as in the case of the bonfire windshield 1 of the first embodiment, the surplus cloth is eliminated from one rectangular cloth to manufacture the bonfire windshield 1A. It is possible to suppress the increase in cost.

(Usage pattern)
With reference to FIGS. 8 and 10, when installing the bonfire windshield 1A on the ground, the support rod B1 is passed through the first cylinder portion 104, and the first reinforcement provided at the upper end of the first cylinder portion 104. One end of the rope N1 is fixed to the hole 104h, the rope N1 is engaged with a step portion provided above the support rod B1, and then the other end of the rope N1 is fixed to the ground using the peg P1. At the lower end of the first tubular portion 104, the third annular member 104r is fixed to the ground using the peg P1.

Similarly, the support rod B1 is passed through the second cylinder portion 105, one end of the rope N1 is fixed to the second reinforcing hole 105h provided at the upper end of the second cylinder portion 105, and the rope N1 is above the support rod B1. After engaging with the provided step portion, the other end of the rope N1 is fixed to the ground using the peg P1. At the lower end of the second tubular portion 105, the fourth annular member 105r is fixed to the ground using the peg P1.

The second cloth 102 fixes the first annular member 102r provided at the tip to the ground using the peg P1. Similarly, in the third fabric 103, the second annular member 103r provided at the tip thereof is fixed to the ground by using the peg P1.

When the windshield 1A for bonfire is fixed to the ground using the peg P1, tension (arrows T1, T2, T3, T4, T5 in FIG. 10) is generated in each cloth, but the bonfire of the present embodiment is generated. The windshield 1A is provided with a notch for relaxing the tension (T5) acting in the horizontal direction. This makes it possible to improve the durability of the bonfire windshield 1A.

FIG. 11 shows another usage state of the bonfire windshield 1A. In the above-mentioned usage state, the case where the support rod B1 is passed through the first cylinder portion 104 and the second cylinder portion 105 has been described, but in FIG. 11, the case where the rod B2 such as a branch available at the campsite is used. Is illustrated. Even when the rod B2 cannot be passed through the first cylinder portion 104 and the second cylinder portion 105, the first reinforcing hole 104h and the third annular member 104r are used (the second reinforcing hole 105h on the opposite side and the second reinforcing hole 105h). The same applies to the fourth annular member 105r), and the bonfire windshield 1A can be installed on the ground.

In this bonfire windshield 1A, as in the case of the bonfire windshield 1 of the first embodiment, the bonfire windshield 1A can be provided in a compact size, easy to carry, and easy to install. It will be possible, and it will be possible to enjoy the bonfire comfortably when performing the bonfire.

In the above-mentioned bonfire windshield 1A, all of the above-mentioned notches, double structures, annular members and reinforcing holes are provided in one bonfire windshield 1A, but any one or more of them may be appropriately combined to form these configurations. It is assumed from the beginning that it is possible to apply.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1,1A bonfire windshield, 101 first cloth, 101a first side, 101b second side, 101s, 102s, 103s notch, 102 second cloth, 102h first double structure, 102r first annular member, 103 3rd cloth, 103h 2nd double structure, 103r 2nd annular member, 104 1st cylinder part, 104h 1st reinforcing hole, 104r 3rd annular member, 105 2nd cylinder part, 105h 2nd reinforcing hole, 105r 4th annular member, 109 reinforcement holes, 200 bonfire.

In the bonfire windshield 1 of the present embodiment, PBO fiber is used as a preferable cloth having high flame retardancy. However, as another cloth, one or more fibers selected from polyphenylene sulfide fibers, PEEK fibers, meta-aramid fibers, para-aramid fibers, PBO fibers, and flame-resistant acrylic fibers composed of organic fibers may be used.

Claims (6)

The rectangular first fabric and
A triangular second fabric provided on the first side of the first fabric and having a hypotenuse away from the first side from the upper end to the lower end.
A triangular third fabric provided on the second side of the first fabric opposite to the first side and having a hypotenuse that is away from the second side from the upper end to the lower end.
A tubular first tubular portion provided along the first side and
A tubular second tubular portion provided along the second side is provided.
The first woven fabric, the second woven fabric, the third woven fabric, the first cylinder portion, and the second cylinder portion are bonfire windshields made of highly flame-retardant materials. The bonfire windshield according to claim 1, wherein the length of the first side side and the second side side of the first cloth is 40 cm or more and 60 cm or less. The bonfire windshield according to claim 1 or 2, wherein the lower side of the first cloth, the lower side of the second cloth, and the lower side of the third cloth are provided with notches extending upward. The first fabric, the second fabric, the third fabric, the first cylinder portion, and the second cylinder portion are made of organic fibers, according to any one of claims 1 to 3. Windshield for bonfire. The windshield for bonfire according to claim 4, wherein the organic fiber comprises one or more fibers selected from polyphenylene sulfide fiber, PEEK fiber, meta-aramid fiber, para-aramid fiber, polybenzol fiber, and flame resistant acrylic fiber. The bonfire windshield according to claim 4, wherein the organic fiber is a polybenzoxazole (PBO) fiber.

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