JPH0641843A - Shock-absorbing belt - Google Patents

Abstract

PURPOSE:To easily obtain a shock-absorbing belt for improving the initial constraint of the driver, etc., with a seat belt device to constrain and protect the driver, etc., in the collision of a car, etc., and capable of lessening the shock by the absorption of the collision energy. CONSTITUTION:An additional constituent material 15 composed of plural low- elongation high-tenacity yarns is inserted along the longitudinal direction of a warp 13 which is a principal constituent material 1 for a belt 11. The additional constituent material 15 is clamped between the upper and lower wefts 14, 14 successively woven in the longitudinal direction of the warp 13. The additional constituent material is randomly broken in the longitudinal direction when an impact load is applied to the belt. The harm index (HIC) can be decreased and the safety can be improved by the use of the belt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be applied to a seatbelt device for protecting an occupant in the event of a high-speed driving such as an automobile or an airplane, a collision, or a fall, and a seatbelt device for a child seat. For belts,
More specifically, the present invention relates to a shock absorbing belt formed by weaving warp threads and weft threads as a basic assembly material.

[0002]

2. Description of the Related Art Conventionally, a seat belt device has been known as a device for protecting passengers such as automobiles and airplanes. The seat belt 1 applied to this seat belt device is shown in FIG.
As shown in FIG. 3, the warp yarn 2 and the weft yarn 3 are woven as a basic assembly material, and are formed of a 2/2 twill weave, a 4/4 twill weave, or the like.

As an example of a conventional seat belt 1, the warp yarn 2 has a yarn fineness of 1000 to 1500 de, and a breaking strength of 8 to 10.
g / de, breaking elongation of 10 to 20%, and weft yarn 3 has a yarn fineness of 500 to 750 de and a breaking strength of 5 to 7
Those having a g / de and a breaking elongation of 15 to 25% are used.

Recently, Japanese Patent Publication No. 54-20732 and Japanese Patent Laid-Open No. 60-261474 disclose energy absorbing belts as shock absorbing belts. The energy absorbing belt disclosed in Japanese Patent Publication No. 54-20732 uses two or more different yarns as the warp yarns of the belt, and at least one of them is an aromatic polyamide fiber. Alternatively, an aromatic polyhydrazide polyamide copolymer fiber is used.

The energy absorbing belt disclosed in Japanese Patent Laid-Open No. 60-261474 is composed of a basic material and at least one kind of additional material combined with the basic material, and the basic material when the same force is applied. It is designed to be able to deform more than at least one kind of additional material. These belts are designed to be plastically deformable when absorbing collision energy.

[0006]

In the seat belt of the conventional seat belt device, even if the breaking elongation in the longitudinal direction of the seat belt is as low as 3 to 8%, the winding shaft of the seat belt retractor can be prevented. Since the extension occurs after the belt withdrawal rotation is stopped, the initial restraint of the occupant is delayed, and the occupant cannot be sufficiently protected and restrained.

Further, as shown in FIG. 8, the initial rising is slow, the initial restraint of the occupant is delayed, and the occupant cannot be sufficiently restrained and restrained, as is clear from the load stretching characteristics of the seat belt using the polyester fiber. Met. Further, although there is a retractor outlet locking mechanism for preventing the extension, it is expensive and there is a risk of belt breakage.

The energy absorbing belt disclosed in Japanese Patent Laid-Open No. 54-20732 is composed of a warp yarn with a lower weave shrinkage than the normal weave and a fabric with a higher weave shrinkage than the normal weave. Has been done. Although the primary rising is obtained with warp yarns having a lower weaving shrinkage ratio than the normal weaving shrinkage ratio, although the weaving structure is low even though the weaving shrinkage ratio is low, elongation occurs, and the primary rising, that is, the initial restraint of the occupant. It had the drawback of being delayed and of being unable to reduce the injury value (HIC).

In the energy absorbing belt disclosed in Japanese Patent Laid-Open No. 60-261474, the basic material and the additional material for forming the belt are pretreated by mechanical and / or heating means at the latest in combination processing. This gave different elongation properties. This mechanical pretreatment is a mechanical process of stretching, shrinking and / or twisting,
It is set to a predetermined reference expansion value.

Further, the pretreatment by the heating means is to stretch and shrink the material in a hot state, and then cool it. Therefore, the shock absorbing belt cannot be easily formed, and there is a drawback that the cost increases, and the initial restraint of the occupant is poor due to the stretching of the belt, and the energy cannot be sufficiently absorbed, which is added to the occupant. The impact could not be sufficiently mitigated.

An object of the present invention is to quickly restrain an occupant when a vehicle or the like is impacted, and to maintain a constant load for a predetermined time with a predetermined set load (fuse load), thereby increasing the amount of expansion of the fuse. Fuse load can be maintained for a long time,
It is intended to provide a shock absorbing belt which is capable of reducing an injury value (HIC) and is extremely excellent in safety.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in an impact absorbing belt formed by weaving a warp yarn and a weft yarn as a basic assembly material, in the longitudinal direction of the warp yarn of the belt. Along the longitudinal direction of the warp yarn, an additional braid composed of a plurality of low elongation high strength yarns is inserted along the longitudinal direction of the weft yarn at an appropriate interval. It is sandwiched between upper and lower wefts, which are sequentially woven together, and the additional assembly made of the low elongation and high strength yarn is broken when an impact load is applied to the belt. And

[0013]

According to the present invention, the additional braids made up of the low elongation and high strength yarns inserted along the longitudinal direction of the warp yarns are sequentially woven along the longitudinal direction of the warp yarns between the upper and lower weft yarns respectively. When the belt is clamped and an impact load is applied to the belt, the additional braid is more strongly clamped between the upper and lower wefts and is still clamped along the longitudinal direction of the warp yarns. With the extension of, the additional assembly material is ruptured at random along the longitudinal direction, and it is possible to maintain a constant load for a predetermined time with a predetermined set load (fuse load), and to maintain the fuse load for a long time, impact load Can absorb the energy of. Further, the initial restraint on the occupant at the time of impact is fast and the injury value can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shock absorbing belt according to the present invention will be described in detail below with reference to the drawings. 1 to 6 each show an outline of one embodiment of the present invention. The shock absorbing belt according to the present invention can be applied to various seat belt devices, which are not shown in the drawings, and shock sensing is possible. It can also be applied to a seatbelt device with a seatbelt tensioner that sometimes winds and closes the seatbelt.

As shown in FIGS. 1 and 2, the impact absorbing belt 11 is constructed by weaving warp threads 13 and weft threads 14 as a basic assembly material 12. Further, an additional assembly material 15 made up of a plurality of low-elongation, high-strength yarns is inserted along the longitudinal direction of the warp yarns 13 of the impact absorbing belt 11 in the longitudinal direction of the weft yarns 14 at appropriate intervals.

Addition material 15 comprising the low elongation and high strength yarn
Is woven so as to be sandwiched between the upper and lower weft threads 14, 14 which are sequentially woven along the longitudinal direction of the warp threads 13. That is, the two weft threads 14, 14 are woven into the warp thread 13, the additional assembly material 15 is sandwiched between the two weft threads 14, 14 and is clamped by the tightening pressure of the basic assembly material 12. In this embodiment, the case of forming by the 2/2 twill weave is shown, but a 4/4 twill weave or other weaving method capable of inserting the additional braid 15 in a straight line state can be applied.

Warp threads 13 and weft threads 14 of the basic assembly 12
As an example, the dry strength is 10 g / de or less, preferably 7 g
/ De or less, breaking elongation 15% or more, preferably 20% or more, and yarn fineness 1800 de or less, preferably 1700 de or less, high η polyester fiber is used. The warp 12
The weft thread 13 and the weft thread 13 are not limited to those formed of the same material and strength, but can be variously modified.

Additional assembly material 15 comprising the low elongation and high strength yarn
As an example, the dry strength is 15 g / de or more, preferably 20.
g / de or more, breaking elongation 8% or less, preferably 4% or less,
A carbon fiber or an aramid fiber having a raw yarn fineness of 1500 de or less, preferably 1100 de or less is used. By using the low elongation and high tenacity yarn as the additional assembly material 15, it is possible to obtain the initial tensile strength of 2300 kg or more, which is a quality characteristic of the seat belt.

Further, the additional assembly material 15 comprising the low elongation and high strength yarn is dried with a drying force of 8 g / de or more, preferably 10 g / de or more, a breaking elongation of 18% or less, preferably 15% or less, and a yarn fineness of 1500 de Hereafter, it can be preferably composed of polyester fiber (PET) of 1100 de or less. By using a low elongation and high strength yarn made of polyester fiber for the additional braid 15, it is possible to obtain an initial tensile strength of 1500 kg or more, which is a quality characteristic of a seat belt.

The load stretching characteristics in the elongation test of the impact absorbing belt 11 in which the additional assembly member 15 is inserted in the basic assembly member 12 will be described with reference to FIG. In addition, this load elongation characteristic diagram is prepared based on the average value in the elongation test. First,
When a tensile load is applied to the shock absorbing belt 11, the primary rising a as an initial constraint is obtained, and the additional assembly material 15 is provided between the upper and lower weft threads 14, 14 pressed by the warp thread 13.
Is clamped more strongly, and is also clamped at a number of positions along the longitudinal direction of the warp yarns 13.
Along with the extension of the warp yarn 13, the predetermined fuse load point b is reached, and at this time, the fuse extension amount c at which the additional assembly material 15 is randomly broken along its longitudinal direction is obtained.

After the fuse expansion amount c is completed, the shock absorbing belt 11 extends to the point d which receives a load of 1130 kg. During the fuse elongation amount c at which the additional assembly material 15 breaks, the plurality of additional assembly materials 15 are randomly broken at a plurality of positions along the longitudinal direction, and as shown in FIG. It was 2-10 cm. In addition, FIG. 5 shows a partial plan view of the additional assembly member 15 of the shock absorbing belt 11 in a broken state, and a portion indicated by a dotted line in the drawing shows the additional assembly member 15.
Is the fractured part of. FIG. 6 shows a broken state in which a part of the additional assembly material 15 is extracted from the basic assembly material 12 and arranged in a disassembled state.

According to the present invention, the additional braids made up of low elongation and high tenacity yarns inserted along the longitudinal direction of the warp yarns of the basic braid are sequentially woven along the longitudinal direction of the warp yarns. When the belt is clamped between the weft threads and an impact load is applied to the belt, the additional braid material is more strongly held between the upper and lower weft threads pressed by the warp threads, and is also held along the longitudinal direction of the warp threads. And the warp of the basic assembly stretches,
The additional assembly material is ruptured at random along the longitudinal direction, the fuse elongation amount can be increased to maintain the fuse load for a long time, and the energy of the impact load can be absorbed.

[0023]

The structure of one embodiment of the shock absorbing belt according to the present invention has been described above. According to this structure, the space between the upper and lower weft yarns of the basic assembly when the belt is subjected to an impact load. The additional assembly is clamped more strongly and is held along the longitudinal direction of the warp of the basic assembly, and as the warp of the basic assembly is extended, the additional assembly is randomly distributed along the longitudinal direction. When the vehicle is impacted, the initial restraint of the occupant can be performed quickly, the amount of expansion of the fuse can be increased to maintain the fuse load for a long time, and the injury value (HIC) can be reduced. In addition, the broken additional material is exposed on the surface of the belt,
The history of wearing the seat belt is known, and since the additional assembly is not exposed directly to the surface of the belt under normal conditions, it is not affected by wear or light, has excellent wear resistance and light resistance, and is significantly It is possible to obtain a shock absorbing belt that is highly safe and can be recycled and saves resources when the basic and additional braids are formed from the same type of polyester fiber, which can significantly improve economic efficiency. it can.

[Brief description of drawings]

FIG. 1 is a woven state of a shock absorbing belt according to the present invention.
FIG.

2A and 2B are views showing a state in which an additional assembly member of the shock absorbing belt according to the present invention is inserted, in which FIG. 2A is a partial front view and FIG.

FIG. 3 is a load extension characteristic diagram in an extension test of the impact absorbing belt according to the present invention.

FIG. 4 is a partial vertical cross-sectional view showing a fractured state of an additional assembly member in an elongation test of a shock absorbing belt according to the present invention.

FIG. 5 is a partial front view showing a fractured state of the additional assembly member in the elongation test of the impact absorbing belt according to the present invention.

FIG. 6 is a disassembled plan view showing a fractured state of an additional assembly member in an elongation test of a shock absorbing belt according to the present invention, in which a part of the additional assembly member is extracted from a basic assembly member.

FIG. 7 is a vertical cross-sectional view of a conventional seat belt in a woven state.

FIG. 8 is a load extension characteristic diagram in an extension test of a conventional seat belt.

[Explanation of symbols]

 11 Shock Absorbing Belt 12 Basic Assembly 13 Warp 14 Weft 15 Additional Assembly

Claims (1)

[Claims] 1. A shock absorbing belt formed by weaving a warp yarn and a weft yarn as a basic braid, wherein an additional braid composed of a plurality of low-elongation and high-strength yarns along the longitudinal direction of the warp yarn of the belt is a weft yarn. Of the low-extension high-strength yarn, which are inserted at appropriate intervals in the longitudinal direction, are sandwiched between upper and lower weft yarns that are sequentially woven along the longitudinal direction of the warp yarns, and are attached to the belt. A shock absorbing belt, characterized in that, when an impact load is applied, the additional assembly material comprising the low elongation and high strength yarn is broken.