JPH083137Y2 - Cover sheet for wiring cords inside automobiles - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover sheet for preventing an accident from occurring by covering wiring cords inside a vehicle that becomes hot to protect them from heat.

[0002]

2. Description of the Related Art A large number of battery cords or wire harnesses are wired for illumination and automation inside various automobiles including general passenger cars, commercial vehicles and trucks. Battery cords and wire harnesses often pass near high-temperature engines and mufflers inside narrow automobiles, and unless these are covered and heat-insulated, a car accident may occur due to wire breakage or electric leakage. Become.

Conventionally, battery cords and wire harnesses have been covered with a heat insulating protective material in which asbestos cloth is pasted on the back side of aluminum foil. However, asbestos cloth is hard and the workability is extremely poor, and the work environment due to dust generation is high. Is becoming a problem. For this reason, it has been proposed to use aromatic nylon fibers that do not melt even at high temperatures near 400 ° C, and a felt made of aromatic nylon fibers is pasted on the back side of the aluminum foil via a glass woven cloth, and this heat insulation protective material is used. Covers the battery cord and wire harness.

[0004]

The felt made of aromatic nylon fiber used for the heat insulating and protective material has heat resistance and self-extinguishing property, but it is instantly ignited when it comes into contact with a strong flame. Then extinguish the fire gradually. In this way, if the heat insulating protective material ignites even in an instant, there is a risk of thermal damage to the battery cord and the wire harness due to this ignition, and there is still a risk of accident occurrence. Also,
In the above heat insulating protective material, the glass woven cloth is interposed between the aluminum foil and the felt, so that the entire sheet becomes hard and the workability is poor.

The present invention has been proposed in order to improve the above-mentioned problems associated with the conventional heat insulating sheet for protecting the wiring cords inside the automobile which becomes hot, and uses a needle felt made of flame resistant fiber. Therefore, it is an object of the present invention to provide a covering sheet capable of preventing accidents due to disconnection of cords and electric leakage.

[0006]

In order to achieve the above-mentioned object, a cover sheet 1 according to the present invention, as shown in FIG.
The metal foil 2 located on the front side and the needle felt 3 made of flameproofed fiber obtained by firing an organic fiber are attached with a flame-retardant adhesive, and for this purpose, the adhesive layer 4 is formed on the back side of the metal foil 2. . The metal foil 2 on the front side is generally an aluminum foil or a stainless steel foil. It is preferable to use an aluminum foil in a normal high temperature environment and a stainless steel foil around a battery to which concentrated sulfuric acid or the like may adhere. The needle felt 3 on the back side has a thickness of usually 0.5 to 20 mm, preferably 1 to 10 mm, and a density of usually 0.05 to 0.25 g / cm ³ ,
It is preferably 0.08 to 0.15 g / cm ³ . As the adhesive layer 4, it is sufficient to apply an adhesive such as acrylic, epoxy, vinyl acetate, rubber, or silicone resin having flame retardancy.

The flameproof fiber constituting the needle felt 3 is made of organic fiber such as acrylic fiber at a temperature of 260 ° C.
It is manufactured by firing for a time, and has a black color with a specific gravity of 1.35 to 1.45. The flame-resistant fiber does not melt even when heated, and gradually loses weight from the heating temperature of 200 ° C.
Maintains practical strength even when reaching 0 ° C. The sheet material obtained by sticking the metal foil 2 and the needle felt 3 may be cut into, for example, a width of 20 to 60 mm and a length of 100 to 600 mm.

The cover sheet 1 is, as illustrated in FIG.
With the metal foil 2 on the front side, both side edges 5 and 5 are sewn to form a tubular shape, and the wiring cords 6 inside the automobile are inserted therein.
Further, as shown in FIG. 3, the flame-retardant pressure-sensitive adhesive layer 7 may be formed by applying a liquid pressure-sensitive adhesive on the back side of the felt or by attaching a double-sided pressure-sensitive adhesive tape. In this case, a covering sheet may be vertically adhered to the periphery of the wiring cords 8 and further fixed with a heat resistant adhesive tape 9 or the like.

[0009]

The needle-felt 3 made of flame-resistant fiber that constitutes the cover sheet 1 does not continue to burn even in an atmosphere where the oxygen concentration in the air is increased, and even if it comes into direct contact with a strong flame, it only heats red and is aromatic. Unlike nylon fiber felt, it does not ignite or ignite in an instant. Needle felt 3
Does not cause fusion or sticking even when it comes into direct contact with a strong flame, and has excellent spark resistance and heat insulation. The cover sheet 1 made of the needle felt 3 has a drape property and a soft feel that are not present in asbestos or glass woven fabric, and therefore the handle sheet is easy to handle during work.

[0010]

EXAMPLES Next, the present invention will be explained based on examples. Example 1 Flame-resistant fibers (trade name: Rastan, manufactured by Asahi Kasei Kogyo Co., Ltd.) having 1.2 denier and a fiber length of 51 to 75 mm were made into a web by carding, and the webs were laminated and appropriately needle punched to have a thickness of 2 mm and a weight. A needle felt 3 with a density of 0.1 g / cm ³ at 200 g / m ² is produced. Apply a flame-retardant acrylic adhesive (equivalent to UL94) on the surface of felt 3 to a thickness of 8
A 0 μm aluminum foil 2 is attached. The obtained sheet material is cut into an appropriate size and used as the covering sheet 1.

The cover sheet 1 is formed into a tubular shape by sewing both edges 5 and 5 with the aluminum foil 2 on the front side. In this
For example, when a wire harness around the muffler pipe is passed through, the covering sheet 1 does not ignite at all even if flames or sparks come into direct contact therewith, and these can be almost completely insulated and protected. In order to compare the heat insulating property of the cover sheet 1 with that of aluminum foil and asbestos cloth or aluminum foil and glass cloth, heat retention rate and claw value (calculated from heat transfer test between hot plate covered with fabric or batting and low temperature air) To measure. Insulation rate is JIS L
Based on the 1096A method, using an ASTM type heat retention tester, the test plate area is 225 cm ² , and the test plate temperature is 35 ± 0.5.
℃, outside temperature is about 20 ℃, the test time is 30 minutes. In addition, the claw value is determined based on ASTM D 1518. The measurement results are shown in the table below.

[0012]

The higher the heat retention rate and the claw value, the better the heat insulation and heat retention of the sample. Therefore, the covering sheet 1
Is superior to that of aluminum foil and asbestos cloth or aluminum foil and glass cloth.

Example 2 A coating sheet is manufactured by the same process as in Example 1 except that 1.9 denier flame-resistant fiber (trade name Lastane) and stainless steel foil are used as the metal foil. This cover sheet is formed into a tubular shape by sewing both side edges 5 and 5 with the stainless steel foil 2 on the front side. As shown in FIG. 2, when the cords 6 connected to the battery 10 are passed through this, the covering sheet does not ignite at all even when a flame or a spark directly contacts, and these can be almost completely insulated and protected. . Further, even if the concentrated sulfuric acid leaked from the battery 10 adheres to the cover sheet, no holes are formed in the cover sheet.

Example 3 A flameproof fiber (trade name: Rastan) having a denier of 51 to 75 mm and a fiber length of 1.2 denier was carded into a web, and the web was laminated and appropriately needle punched to give a thickness of 3
mm, to produce a needle felt 3 of density 0.12 g / cm ³ weighs 350 g / m ^2. A flame-retardant acrylic adhesive is applied to the surface of the felt 3, and an aluminum foil 2 having a thickness of 80 μm is attached.
The obtained sheet material is cut into an appropriate size, and a double-sided adhesive tape is attached to the back surface of the felt 3 to form the flame-retardant adhesive layer 7. The above-mentioned needle felt is tested for flame resistance performance (indoor) by applying the standard (45 ° micro-burner method) of Article 4-3 of the Fire Service Law Enforcement Regulation. The acceptance criteria based on Article 4-3 of the Fire Service Law Enforcement Regulations are an afterflame time of 3 seconds or less, an afterglow time of 5 seconds or less, and a carbonization time of 30 cm ² .
The test results are shown in the table below.

[0016]

From this result, the needle felt passed the criteria of Article 4-3 of the Fire Service Law Enforcement Regulations,
It turns out that it has sufficient flameproof performance.

As shown in FIG. 4, the cover sheet of Example 3 is vertically adhered to the periphery of the cords 7 around the engine by the adhesive layer 7 formed on the back side of the felt. A silicone rubber tape 9 is further wound on the cover sheet adhered in a tubular shape to firmly fix the sheet.

[0019]

EFFECTS OF THE INVENTION Since the covering sheet according to the present invention uses the needle felt made of flame resistant fiber, it does not burn even in an atmosphere where the oxygen concentration in the air is increased, and it becomes red hot even if it comes into direct contact with a strong flame or spark. Just by itself, there is no momentary ignition / flame. By covering with the seat of the present invention, even if the battery cord and the wire harness pass near the engine and the muffler in a narrow automobile, they are almost completely insulated and protected. As a result, the cover sheet of the present invention protects the wiring cords inside the vehicle which becomes hot and prevents the occurrence of automobile accidents due to the disconnection of the cord or the electric leakage.

Further, the needle felt used for the cover sheet of the present invention is made of flame resistant fiber and has a drape property and a soft touch which are not present in asbestos or glass woven fabric, and thus the cover sheet is easy to handle during work. . If the metal foil used is a stainless steel foil, even if concentrated sulfuric acid or the like leaked from the battery adheres to the cover sheet, no holes are formed in the cover sheet, which is safe.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view schematically showing a covering sheet according to the present invention.

FIG. 2 is a partial perspective view illustrating a usage state of the covering sheet of the present invention.

FIG. 3 is an enlarged sectional view schematically showing a modified example of the present invention.

FIG. 4 is a partial perspective view illustrating a usage state of the covering sheet of FIG.

[Explanation of symbols]

 1 Cover Sheet 2 Metal Foil 3 Needle Felt 4 Flame Retardant Adhesive Layer 5 Sheet Side Edge 6 Wiring Cords

Claims (2)

[Scope of utility model registration request] 1. A metal foil located on the front side and a flame-resistant fiber obtained by firing an organic fiber, having a thickness of 0.5 to 20 mm and a density of 0.05 to
A 0.25 g / cm ³ needle felt is attached with a flame-retardant adhesive, and the metal foil is laid on the front side and sewn on both edges to form a tubular shape. Passing cover sheet. 2. A metal foil located on the front side and a flame-resistant fiber obtained by firing an organic fiber, having a thickness of 0.5 to 20 mm and a density of 0.05 to
A 0.25g / cm ³ needle felt is attached with a flame-retardant adhesive, and the flame-retardant adhesive applied to the back of the felt adheres vertically around the wiring cords inside the automobile.