JP7136170B2 - Bonfire windshield - Google Patents

Description

The present disclosure relates to a windshield for open fires used outdoors.

Conventionally, there have been lightweight, inexpensive, assembly-type windshield devices, but they have not been applicable to bonfires with high heating power (Patent Document 1).

JP-A-2002-42522

As the number of campers increases, more people are setting fires. Among them, it is required to be able to make a fire more safely and comfortably. The cause of the accidents and discomfort that occurs is that the smoke, odor, sparks, etc. generated by the fire are scattered and spread by the wind. However, there is no product that actually effectively suppresses this.

Also, in recent years, the easiness of carrying camping equipment and the easiness of installation have been emphasized. Although the above purpose can be achieved with a wood-burning stove, it is heavy and difficult to install and transport.

An object of the present disclosure is to provide a windshield for bonfire, which is lightweight and easy to set up, and yet allows a safe and comfortable bonfire to be enjoyed.

According to an aspect of the present disclosure, a first fabric having a rectangular shape and a triangular shape provided on the first side of the first fabric and having an oblique side that moves away from the first side from the upper end toward the lower end and a triangular second fabric having an oblique side that is provided on a second side opposite to the first side of the first fabric and that recedes from the second side from the upper end toward the lower end. 3 fabric, a tubular first tubular portion provided along the first side, and a tubular second tubular portion provided along the second side, the first fabric, The second fabric, the third fabric, the first tubular portion, and the second tubular portion are made of a highly flame-retardant material.

In the windshield for bonfire, the length of the first side and the second side of the first fabric is 40 cm or more and 60 cm or less.

In the windshield for bonfire, cuts extending upward are provided in the lower side of the first fabric, the lower side of the second fabric, and the lower side of the third fabric.

In the windshield for bonfire, the first fabric, the second fabric, the third fabric, the first tubular portion, and the second tubular portion are made of organic fibers.

In the windshield for bonfire, the organic fibers are made of one or more fibers selected from polyphenylene sulfide fibers, PEEK fibers, meta-aramid fibers, para-aramid fibers, polybenzol fibers, and flame-resistant acrylic fibers.

In the windshield for bonfire, the organic fibers are polybenzoxazole (PBO) fibers.

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

Fig. 2 is a perspective view from the front side of the windshield for bonfire of Embodiment 1; 2 is a first developed view of the windshield for open fire according to Embodiment 1. FIG. 4 is a second development view of the windshield for open fire according to Embodiment 1. FIG. FIG. 2 shows the flame retardant properties of Zylon®. FIG. 4 is a diagram showing a comparison of texture characteristics between the fabric used for the windshield for open fire of Embodiment 1 and other fabrics. It is a figure which shows the LOI value of various fabrics. FIG. 2 is a perspective view showing a usage state of the windshield for open fire according to Embodiment 1; It is a perspective view from the front side of the windshield for campfires of Embodiment 2. FIG. FIG. 10 is an exploded view of the windshield for open fire according to the second embodiment; FIG. 11 is a side view of the windshield for open fire according to the second embodiment in use. FIG. 11 is a side view of another usage state of the windshield for campfire according to the second embodiment;

A windshield for fire according to each embodiment based on the present disclosure will be described below with reference to the drawings. In the embodiments described below, when referring to the number, amount, etc., the scope of the present invention is not necessarily limited to the number, amount, etc., unless otherwise specified. The same reference numbers are given to the same parts and equivalent parts, and redundant description may not be repeated. It is planned from the beginning to use the configurations in the embodiments in combination as appropriate.

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

This bonfire windshield 1 has a so-called camp curtain shape as a whole. Specifically, it has a rectangular first fabric 101 and an oblique side provided on the first side 101a (left side in the drawing) of the first fabric 101 and moving away from the first side 101a from the upper end to the lower end. The triangular second fabric 102 and the first side 101a of the first fabric 101 are provided on the second side 101b on the opposite side (right side in the drawing), and from the second side 101b from the upper end to the lower end A triangular third fabric 103 having a receding oblique side, a tubular first tubular portion 104 along the first side 101a, and a tubular second tubular portion 105 provided along the second side 101b. , is provided.

Reinforcing holes 109 reinforced with eyelets or the like are provided in the tip portion of the triangular second fabric 102 which is located away from the first fabric 101 . Similarly, the triangular third fabric 103 is provided with a reinforcing hole 109 reinforced with an eyelet or the like at the tip portion of the triangular third fabric 103 away from the first fabric 101 . The reinforcing holes 109 reinforced with eyelets or the like are also used when installing the bonfire windshield 1, but the reinforcing holes 109 reinforced with the eyelets or the like are not necessarily an essential configuration. can be used.

The first fabric 101, the second fabric 102, the third fabric 103, the first tubular portion 104, and the second tubular portion 105 are made of a highly flame-retardant material. 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 cylindrical portion 104, and similarly, the support rod B1 is passed through the second cylindrical portion 105. The lower end of the support rod B1 is driven into the ground so that the first fabric 101 is pulled, and one end of the rope N1 is fixed to the upper end of the support rod B1. to the ground.

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

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

The above dimensions are just an example, but since the windshield 1 for bonfire of the present embodiment uses a highly flame-retardant fabric, which will be described later, the bonfire stand is installed close to the windshield 1 for bonfire. can do. As a result, the size of the bonfire windshield 1 can be reduced. For example, it is possible to reduce the height (H) of the first fabric 101 to about 40 cm and the width (W1) to about 40 cm.

Referring to FIG. 3, when manufacturing the windshield 1 for bonfire, a second fabric 102 is formed by cutting a triangular fabric from one side of a piece of rectangular fabric, and this second fabric 102 is used as a rectangular fabric. By attaching to the other side, the first fabric 101, the second fabric 102, the third fabric 103, the first tubular portion 104 and the second tubular portion 105 are formed from one rectangular fabric. For example, when the width of the raw fabric is 1200 mm, the first fabric 101 (W1 = 600 mm), the second fabric 102 (W2 = 400 mm), the third fabric 103 (W2 = 400 mm), the first tubular portion 104 (S1 = 80 mm) and second tubular portion 105 (S1=80 mm). As a result, surplus fabric can be eliminated, and an increase in the manufacturing cost of the windshield 1 for open fire can be suppressed.

(Fabric material)
The material of the highly flame-retardant fabric used for the first fabric 101, the second fabric 102, the third fabric 103, the first tubular portion 104, and the second tubular portion 105 will be described with reference to FIG. The material of the side cloth used in the present embodiment is polybenzol fiber (PBO fiber) (trade name “Zylon (registered trademark)”).

As shown in FIG. 4, Zylon® fibers exhibit very high flame retardancy. In a combustion test based on JISL1091 (A-vertical method), a very small carbonization length and residual time are shown.

Polybenzol fiber refers to a fiber made of polybenzazole polymer, and polybenzazole (hereinafter also referred to as PBZ) includes polybenzoxazole (hereinafter also referred to as PBO) and polybenzothiazole (hereinafter also referred to as PBT). , or polybenzimidazole (hereinafter also referred to as PBI).

In this disclosure, PBO refers to a polymer containing oxazole rings bonded to aromatic groups, which need not necessarily be benzene rings, but may be biphenylene groups, naphthylene groups, and the like. Furthermore, PBO is not only a homopolymer of poly(p-phenylenebenzobisoxazole), but also a copolymer in which a part of the phenylene group of poly(p-phenylenebenzobisoxazole) is substituted with a heterocyclic ring such as a pyridine ring, and an aromatic Polymers consisting of multiple oxazole ring units attached to groups are broadly included. This is the same for PBT and PBI. Also included are mixtures of two or more of PBO, PBT and PBI, block or random copolymers of two or more of PBO, PBT and PBI, and mixtures, copolymers, block polymers, etc. of these polybenzazole polymers. .

The structural units contained in the PBZ polymer are preferably selected from lyotropic liquid crystal polymers that form liquid crystals at specific concentrations. The polymer consists of monomer units described in structural formulas (a)-(h) shown below, preferably consisting essentially of monomer units selected from structural formulas (a)-(d). is. In addition, some of these monomer units may contain monomer units having substituents such as alkyl groups and halogen groups.

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 concentrated sulfuric acid or mixtures thereof. Further suitable solvents are polyphosphoric acid and methanesulphonic acid. Also the most suitable solvent is polyphosphoric acid.

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

In the present disclosure, suitable polymers or copolymers and dopes are synthesized by known methods. For example, Wolfe et al., U.S. Pat. No. 4,533,693 (1985.8.6); Sybert et al., U.S. Pat. No. 4,772,678 (1988.9.22); 4,847,350 (1989.7.11) or Gregory et al., US Pat. No. 5,089,591 (1992.2.18). Briefly, the preferred monomer is heated in a non-oxidizing, dehydrating acid solution in a non-oxidizing atmosphere under conditions of high agitation and high shear, from about 60° C. to 230° C. at a stepped or constant heating rate. Raise it to react.

The spun yarn requires a draw zone length of sufficient length to obtain a sufficient draw ratio (SDR) and a relatively high temperature (above the solidification temperature of the dope and below the spinning temperature) rectified It is desirable to cool uniformly with cooling air. The length (L) of the draw zone is required to complete solidification in the non-coagulating gas, and is determined by the single hole discharge rate (Q). In order to obtain good fiber physical properties, the take-out stress in the draw zone must be 1.8 g/dtex or more in terms of polymer (assuming that the stress is applied only to the polymer).

The yarn drawn in the draw zone is then led to a medium bath for solvent extraction and yarn coagulation. The extraction (coagulation) medium used in the extraction (coagulation) bath is preferably a liquid having a hydroxyl group in the molecule, that is, water, methanol, ethanol, ethylene glycol, or a solution prepared by mixing these with phosphoric acid, and more preferably. is water or an aqueous phosphoric acid solution.

The concentration of phosphoric acid in the phosphoric acid aqueous 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 solidification temperature is preferably in the range of 5°C to 60°C, more preferably 10°C to 50°C, and most preferably 15°C to 40°C.

After passing through the first extraction (coagulation) bath, it is further neutralized with an aqueous sodium hydroxide solution or the like, and the phosphoric acid contained in the fiber (thread) is extracted through a washing step such as the second extraction bath. The final extraction is carried out so that the amount of phosphoric acid contained in the yarn in the extraction bath is 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 preferred, and an aqueous solution of phosphoric acid and water are preferred. more preferred. The extraction (coagulation) bath may be divided into multiple stages to gradually reduce the concentration of the phosphoric acid aqueous solution, and finally washed with water. These extraction treatments generally reduce the phosphorus atom content in the fiber to around 10000-2000 ppm.

Finally, the moisture in the fiber is dried to 2% or less through the drying process. For the drying method, you can choose the general roller drying method or the 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, texture properties of fabrics used for the first fabric 101, the second fabric 102, the third fabric 103, the first tubular portion 104, and the second tubular portion 105 will be described. FIG. 5 is a diagram showing the result of comparing the texture characteristics of the fabric used for the windshield 1 for open fire and other fabrics.

The "basis weight (absolute dry mass)" of the fabric used in the present embodiment is preferably 100 to 1200 g/m ² , more preferably 150 to 800 g/m ² . In this embodiment, 320 g/m ² is 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 is used. The "thickness" measurement method is based on JIS L1096.

The fabric used in this embodiment is not a filament fabric, but a spun yarn fabric. Zylon (registered trademark) fabrics include filament fabrics and spun yarn fabrics, but the spun yarn fabric was used because it "softens the texture" and "easily increases thickness even with the same basis weight". 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 fabric (work clothes)" were used as samples to be compared with the Zylon (registered trademark) fabric. Here, "polyester fabric (work clothes)" is a blend of 65% PET and 35% cotton.

As comparison parameters, the "average coefficient of friction", "thickness (mm)", "basis weight (g/ ^m2 )", and "thermal conductivity (W/mk)" of each sample were compared.

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

"Thermal conductivity (W/mk)" was measured using KES-FB7, Thermo Lab II manufactured by Kato Tech Co., Ltd. as follows. Ambient environment 20 ° C. 65% RH, hot plate temperature (BT-Box) 35 ° C., sample stage (Thermo Cool) temperature 20 ° C. (ΔT: 15 ° C.), contact load 6 g / cm ² (standard) was placed on Thermo Cool, and a Thermolab hot plate was placed on the sample. After 10 minutes, the power consumption of the Thermolab hot plate was measured three times, and the average value was obtained. Further, the thickness of the sample necessary for calculating the thermal conductivity was measured with a load of 6 g/cm ² (calculated by the BT-Box weight).

When used as a windshield for bonfires, bonfires concentrate and heat up, and in order to avoid the surface temperature reaching the thermal decomposition temperature or flash point, it is desirable to diffuse heat quickly. It is preferable that the (W/mk) is high and the heat transfer is fast.

Fiberglass is 'tingly' to the touch, so a coating is essential to improve the feel. If a heavy glass fiber having a specific gravity of more than 2 is coated with silicon, the basis weight increases and the weight of the fabric increases. Furthermore, coating rigid glass fiber gives it a hard texture.

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

[Flame retardance (LOI value)]
The flame retardancy of each fiber will be described with reference to FIG. The LOI value is a limiting oxygen index, which can be measured by the combustibility test method for polymer materials according to the JIS K7201-1995 oxygen index method. The larger the LOI value, the better the flame retardancy. Judgment was made according to the JISL1091 method textile product combustion test (B method).

As shown in FIG. 6, the PBO fiber has a larger LOI value than the other fibers, indicating superior flame retardancy.

In the windshield 1 for bonfire according to the present embodiment, PBO fiber is used as a preferable fabric that is highly flame-retardant. However, as other fabrics, 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 form)
A usage pattern of the windshield 1 for open fire will be described with reference to FIG. 7 . FIG. 7 is a perspective view showing how the windshield 1 for open fire is used. As shown in FIG. 7, when this windshield 1 for bonfire is used, the bonfire stand 200 can be used as the windshield 1 for bonfire because the fabric with extremely high flame resistance is used as described above. Can be placed close together.

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

[Embodiment 2: Bonfire windshield 1A]
Next, with reference to FIGS. 8 to 10, a windshield 1A for fire according to Embodiment 2 will be described. FIG. 8 is a front perspective view of the bonfire windshield 1A, FIG. 9 is an exploded view of the bonfire windshield 1A, and FIG. 10 is a side view of the bonfire windshield 1A in use.

The basic structure of the windshield 1A for fire according to the present embodiment is the same as that of the windshield 1 for fire according to the first embodiment. The difference is that, as shown in FIGS. 8 and 9, the windshield for bonfire 1A has notches extending upward on the lower side of the first fabric 101, the lower side of the second fabric 102, and the lower side of the third fabric 103. 101 s, 102 s, and 103 s are provided in the vicinity of the first tubular portion 104 and the second tubular portion 105 . The cuts 101s, 102s, and 103s of the present embodiment are provided at two locations on the lower side of the first fabric 101, one location on the lower side of the second fabric 102, and one location on the lower side of the third fabric 103, a total of four locations. . This quantity can be changed as appropriate. The shape of each incision has an isosceles triangle shape in this embodiment, but the shape of the incision is not limited to this shape, and the tension acting in the horizontal direction can be relaxed. Any shape is acceptable.

In addition, a first double structure 102h is provided in which a part of the corner of the second fabric 102 opposite to the first fabric 101 is folded back toward the first fabric 101 to improve the strength of the tip portion. ing. A 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 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 am letting A second annular member 103r is provided in the portion of the second double structure 103h.

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

As shown in FIG. 9, in the bonfire windshield 1A having the above configuration, similarly to the bonfire windshield 1 of Embodiment 1, surplus fabric is removed from one rectangular fabric to manufacture the bonfire windshield 1A. This makes it possible to suppress cost increases.

(Usage form)
8 and 10, when installing the windshield 1A for bonfire on the ground, the support rod B1 is passed through the first tubular portion 104, and the first reinforcement provided at the upper end of the first tubular portion 104 is installed. One end of the rope N1 is fixed to the hole 104h, the rope N1 is engaged with a step 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 pegs P1.

Similarly, the support rod B1 is passed through the second cylindrical portion 105, one end of the rope N1 is fixed to the second reinforcing hole 105h provided at the upper end of the second cylindrical portion 105, and the rope N1 is positioned above the support rod B1. After engaging with the step provided, 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 a peg P1.

The second fabric 102 fixes the first annular member 102r provided at the tip to the ground using the peg P1. Similarly, the third fabric 103 fixes the second annular member 103r provided at the tip to the ground using the peg P1.

When the bonfire windshield 1A is fixed to the ground using the pegs P1, tension (arrows T1, T2, T3, T4, and T5 in FIG. 10) is generated in each fabric. The windshield 1A is provided with notches for relaxing the tension (T5) acting in the horizontal direction. This makes it possible to improve the durability of the windshield 1A for open fire.

FIG. 11 shows another usage state of the windshield 1A for open fire. In the above-described use state, the case where the support rod B1 is passed through the first cylindrical portion 104 and the second cylindrical portion 105 has been described, but in FIG. is illustrated. Even if the rod B2 cannot pass through the first cylindrical portion 104 and the second cylindrical 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 and Similarly for the fourth annular member 105r), the bonfire windshield 1A can be installed on the ground.

As with the bonfire windshield 1 of Embodiment 1, this bonfire windshield 1A is also compact, easy to transport, and easy to install. It becomes possible, and when making a fire, it is possible to enjoy the fire comfortably.

In the above-described bonfire windshield 1A, one bonfire windshield 1A is provided with all of the cuts, the double structure, the annular member, and the reinforcing hole described above. It is assumed from the beginning that it is possible to apply

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

1, 1A windshield for bonfire, 101 first fabric, 101a first side, 101b second side, 101s, 102s, 103s cut, 102 second fabric, 102h first double structure, 102r first annular member, 103 Third fabric 103h Second double structure 103r Second annular member 104 First tubular portion 104h First reinforcing hole 104r Third annular member 105 Second tubular portion 105h Second reinforcing hole 105r 4th annular member, 109 reinforcement hole, 200 fire stand.

Claims (6)

a rectangular first fabric;
a triangular second fabric having an oblique side that is provided on the first side of the first fabric and moves away from the first side from the upper end toward the lower end;
a triangular third fabric having an oblique side that is provided on a second side of the first fabric opposite to the first side and that extends away from the second side from an upper end toward a lower end;
a cylindrical first cylindrical portion provided along the first side;
a cylindrical second cylindrical portion provided along the second side;
a first support rod through which the first tubular portion passes;
a second support rod through which the second cylindrical portion passes;
with
A first reinforcing hole is provided in a tip portion of the second fabric which is a position away from the first fabric,
A second reinforcing hole is provided at a tip portion of the third fabric that is separated from the first fabric,
The first fabric, the second fabric, the third fabric, the first cylindrical portion, and the second cylindrical portion are made of a highly flame-retardant material. The windshield for open fire according to claim 1, wherein the first side and the second side of the first fabric have a length of 40 cm or more and 60 cm or less. The windshield for open fire according to claim 1 or 2, wherein cuts extending upward are provided in the lower side of the first fabric, the lower side of the second fabric, and the lower side of the third fabric. Said 1st fabric, said 2nd fabric, said 3rd fabric, said 1st cylinder part, and said 2nd cylinder part are any one of Claims 1-3 comprised with the organic fiber. Windshield for bonfire. 5. The windshield for open fire according to claim 4, wherein the organic fibers are made of one or more fibers selected from polyphenylene sulfide fibers, PEEK fibers, meta-aramid fibers, para-aramid fibers, polybenzol fibers, and flame-resistant acrylic fibers. 5. The campfire windshield according to claim 4, wherein the organic fibers are polybenzoxazole (PBO) fibers.

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