JPH0624671A - Bag for airvator @(3754/24)airbag type elevator) - Google Patents

Abstract

(57) [Summary] [Objective] The object of the present invention is to provide a required characteristic of an air bag type elevator utilizing air pressure: strong ≥ 150 kg.
/ 3 cm, peeling strength ≧ 4.0 kg / 2 cm, basis weight (lightness) ≦ 450 g / m 2, sheet hardness (JIS-L-1
096, C method loop compression method) ≦ 100 g, bending resistance ≧ 2
It is to provide a bag for an air beta that satisfies the requirement of 0,000 times. [Constitution] Single yarn fineness of 3.5 denier or less, single fiber strength 1
A checkered spun yarn composed of short fibers having an average fiber length of 100 to 2000 mm at 2 g / d or more is woven, and the woven density and the total fineness in the warp direction and the weft direction of the woven fabric have the following expression, and at least one side An air beta bag comprising a sheet having a thermoplastic resin coated thereon. 900> Woven Density x Route Total Fineness> 500 (Woven Density; Book /
Inch, fineness; denier)

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air beta bag which uses air pressure to elevate and lower an elevator, for example. Here, the air beta is a device that pushes air into the air beta bag to push up the air bag and removes air from the air beta bag to lower the air bag to raise and lower people, animals, and things. . The air beta can be used for general household use, business use, garage, etc.

[0002]

2. Description of the Related Art Conventionally, elevators are lifted and lowered by winding a wire connected to an elevator box exclusively through a pulley and rewinding it with a motor. Since such an elevator is heavy and occupies a large space, its use is limited to business such as building, and it is costly to maintain and to use for general households and garages. It was difficult including.

Generally, the required characteristic of an air bag type elevator utilizing air pressure is that the strength is ≧ 150 kg / 3.
cm, peeling strength ≧ 4.0 kg / 2 cm, basis weight (lightness)
≦ 450 g / m ² , sheet hardness (JIS-L-109
6, C method loop compression method) ≦ 100 g, flex resistance ≧ 200,000 times.

By the way, a composite cloth in which a resin is combined with a fiber is widely used in applications such as a tent, a sail cloth, a balloon, a hovercraft, a rubber boat, a flexible container, and a canoe. Flexible sheets for air betas that satisfy the various characteristics required for sheets have not yet been realized.

For example, a flexible sheet in which a resin is combined with a base fabric made of polyester filament is difficult to apply in terms of peeling strength, strength and light weight. That is, in order for the flexible sheet in which the resin is combined with the base fabric made of polyester filament to satisfy the above required characteristics, the base fabric weight is required to be 300 g / m ² or more and the resin weight is to be 600 g / m ² or more. Therefore, the basis weight of the product becomes 900 g / m ² or more, which is not practical.

The so-called canvas, which is a composite of polyester spun yarn and resin, has a satisfactory peeling strength, but in view of strength and weight, it is more flexible than a flexible sheet in which a base material made of polyester filament is combined with resin. Inferior. Alternatively, a flexible sheet in which a resin is combined with a base fabric made of aramid filament, which uses high-strength fibers, is acceptable in terms of high strength and light weight, but its adhesive strength with the resin is not sufficient, so the peel strength is low. Becomes impractical.

[0007]

OBJECTS OF THE INVENTION The object of the present invention is to solve the above problems in the prior art. That is, an object of the present invention is to simply lift up an air bag by blowing air into the air beta bag and lower the air bag by removing air from the air beta bag to raise and lower people, animals, objects and the like. To provide an elevator. Therefore, the required characteristics of an air bag type elevator using air pressure: Strength ≧ 150 kg / 3 cm, Peel strength ≧ 4.0
kg / 2 cm, basis weight (lightness) ≦ 450 g / m ² , sheet hardness (JIS-L-1096, C method loop compression method) ≦
An object of the present invention is to provide an air beta bag that satisfies 100 g and flex resistance ≧ 200,000 times.

[0008]

That is, according to the present invention, "(Claim 1) Single-strand strength of 3.5 denier or less, single yarn tenacity of 12 g / d or more, and weaving a stretch-cut spun yarn made of short fibers having an average fiber length of 100 to 2000 mm. A bag for an air beta, characterized in that the woven density and the total fineness in the warp direction and the weft direction of the woven fabric have the following relationship, and that the woven fabric comprises a sheet having at least one surface coated with a thermoplastic resin.

900> weave density × root total fineness> 500
(Woven density: book / inch, fineness; denier) (Claim 2) Single yarn fineness of 3.5 denier or less, single fiber strength of 12 g / d or more, and spun-off spun yarn made of short fibers having an average fiber length of 100 to 2000 mm. A woven fabric in which the woven density and the total fineness in the warp and weft directions of the woven fabric are in the following formula, and at least one surface of which is coated with a thermoplastic resin has a fluorine-based resin or an acrylic resin on at least one surface. The bag for an air beta according to claim 1, which is coated with one resin selected from the following.

900> Woven Density x Root Total Fineness> 500
(Woven density; book / inch, fineness; denier) (Claim 3) The bag for an air beta according to claim 1 or 2, wherein the heat shrinkage rate of the short fibers is 1% or less at 180 ° C of dry heat.

Here, the single yarn fineness is 3.5 denier or less, the single fiber strength is 12 g / d or more, and the average fiber length is 100 to 2000.
The mm short fiber is, for example, an aramid fiber, a high-strength polyester fiber, a high-strength polyvinyl alcohol fiber, a high-strength polyolefin fiber, a carbon fiber, a metal fiber, an inorganic fiber, or the like, which satisfies the above-mentioned required characteristics.

The single yarn fineness is 3.5 denier or less, preferably 1.5 denier or less. When the single yarn fineness exceeds 3.5 denier, the number of single yarns in the multifilament is reduced, the exposed end yarns are reduced, and the peeling strength from the resin is reduced, making it unusable for use.

The single fiber strength is 12 g / d or more, preferably 20 g / d or more. If the single fiber strength is less than 12 g / d, the weight of the base cloth becomes large, and the strength is high and the purpose of weight reduction cannot be achieved.

The average fiber length is 100 to 2000 mm. If the average fiber length is less than 100 mm, the strength utilization factor after weaving is lowered, and it is difficult to obtain sufficient product strength. If the average fiber length exceeds 2000 mm, the tenacity factor after weaving is high, but the number of short fiber end yarns (fluffy end yarns) exposed on the fiber surface of the stretch-cut spun yarn decreases, and Adhesive strength when combined is reduced, so sufficient peel strength cannot be obtained. In order to obtain sufficient peel strength, the number of short fiber end yarns exposed on the surface of the stretch-cut spun yarn is at least 1 /
It is desirable to use those that are present in cm, preferably 2 / cm or more.

The relation between the weaving density and the total fineness in the warp direction and the weft direction of the woven fabric needs to satisfy the following formula.

900> weave density × root total fineness> 500
(Woven density; book / inch, fineness; denier) When the woven density x the total root fineness is 500 or less, it is difficult to obtain uniform sheet properties after resin processing because the weft is too wide and misalignment easily occurs. Weave density x root total fineness is 9
If it exceeds 00, fine yarns and high weaving density may cause the single yarns to be entangled with each other, making it impossible to weave, and the ratio of the fluffy end yarns to be exposed on the surface of the base fabric is reduced, so that resin impregnation is performed. In that case, it becomes difficult to obtain the bridge effect, and thus sufficient peeling strength cannot be obtained.

A vinyl chloride resin is often used as the thermoplastic resin, but a normal canvas resin may be used.
It is not necessarily limited. When at least one surface of the sheet of the present invention according to claim 1 is further coated with one resin selected from a fluororesin or an acrylic resin to form an air beta bag, more water repellency, weather resistance and durability are obtained. It can be used as a bag for an air beta that has high properties.

The short fibers used in the bag for the air beta of the present invention preferably have a heat shrinkage of 1% or less at a dry heat of 180 ° C. Heat shrinkage is 1% at 180 ° C dry heat
When the following short fibers are used, the fiber shrinkage does not occur in the sheet at the processing temperature of 170 to 180 ° C, the voids between the fibers become uniform, the resin is uniformly impregnated into the base cloth, and the peel strength of the entire sheet is increased. Can be increased.

[0019]

The bag for the air beta of the present invention comprises:
Since it can withstand the lifting and lowering of the air beta under a load of about 30 to 600 kg, various characteristics required for a flexible sheet, strength ≧ 150 kg / 3 cm, peel strength ≧ 4.0 k
g / 2 cm, basis weight ≦ 450 g / m ² , sheet hardness (JI
S-1096, C method loop compression method) ≦ 100g, flex resistance ≧ 200,000 times, etc. It is a practical and durable air beta bag, which is a foldable and lightweight air beta bag. is there.

The present invention will be specifically described below with reference to examples. In the examples, the strength, peel strength, sheet hardness, etc. were evaluated according to the following methods.

Strong: JIS-L-1096, 6.12
Tensile strength and elongation Peel strength: K6328.6.3.7 Peel test Sheet hardness: JIS-L-1096, 6.20.3 C
Method (11-10 compression method)

[0022]

Example 1 Single yarn fineness 0.5 denier, single fiber strength 21
g / d, using a stretch-cut spun yarn (average fluffy end yarn count of 4.72 pieces / cm) made of para-aramid short fibers (Technora fiber, Teijin Limited) having an average fiber length of 1500 mm,
It was woven at a weaving density of 55 yarns / inch in both the warp direction and the weft direction. The woven fabric thus obtained was impregnated with vinyl chloride sol, and the vinyl chloride resin was calendered to obtain a flexible sheet having a weight of 380 g / m ² (technola base fabric 90 g / m ² ). The strength of the sheet was 210 kg / 3 cm in the warp direction, 220 kg / 3 cm in the weft direction, and the peeling strength was 4.4 kg / cm in the warp direction.
2 cm, weft direction 4.1 kg / 2 cm, sheet hardness 4
It was 7 g. Using this sheet, the outer diameter is 1. by sewing with a sewing machine and welding with a high-frequency welder.
A bellows type air beta bag having a diameter of 1 m and an inner diameter of 0.5 m was prepared. An air beta using the bellows type air beta bag pushes the air bag up by blowing air into the air beta bag, and lowers the air bag by removing air from the air beta bag to drop people, animals, or objects. Etc. could be raised and lowered safely and smoothly.

[0023]

Comparative Example 1 Single yarn fineness 8.2 denier, single fiber strength 8.
A 0 g / d polyester high-strength filament fiber (total fineness 1000 denier, 192 filament, manufactured by Teijin Ltd.) was woven at a weaving density of 17 filaments / inch in both warp and weft directions. Both sides of the obtained woven fabric were topped with a vinyl chloride resin to obtain 980 g / m ² (polyester base fabric 15
A flexible sheet of 0 g / m ² ) was obtained. The strength of the sheet is 170 kg / 3 cm in the warp direction and 165 k in the weft direction.
g / 3cm, peel strength is 4.5kg / 2cm in the longitudinal direction,
The weft direction was 4.1 kg / 2 cm, and the sheet hardness was 600 g.

The obtained flexible sheet has high weight and low handling workability, and the bellows-shaped air beta produced by using this sheet has low durability and lacks practicality as an air beta. .

Claims (3)

[Claims] 1. A check-punched spun yarn composed of short fibers having a single yarn fineness of 3.5 denier or less, a single fiber strength of 12 g / d or more, and an average fiber length of 100 to 2000 mm, and the warp and weft directions of the woven fabric. A bag for an air beta, characterized in that the woven density and the total fineness in (1) and (2) have a relationship of the following formula, and is composed of a sheet having at least one surface coated with a thermoplastic resin. 900> Woven Density x Root Total Fineness> 500 (Woven Density; Book /
Inch, fineness; denier) 2. A check-punched spun yarn composed of short fibers having a single yarn fineness of 3.5 denier or less, a single fiber strength of 12 g / d or more and an average fiber length of 100 to 2000 mm, and the warp and weft directions of the woven fabric. In the following formula, the woven density and the total fineness are in the following formula, and at least one surface of a sheet having at least one surface coated with a thermoplastic resin is coated with one resin selected from a fluororesin or an acrylic resin. Item 1. Air beta bag. 900> Woven Density x Root Total Fineness> 500 (Woven Density; Book /
Inch, fineness; denier) 3. The bag for an air beta according to claim 1, wherein the heat shrinkage of the short fibers is 1% or less at a dry heat of 180 ° C.