JP2517213Y2 - Antistatic interior materials for automobiles - Google Patents

Description

TECHNICAL FIELD The present invention relates to interior materials such as seats, carpets, door linings, etc. in a vehicle compartment of an automobile, and particularly to an antistatic interior material in a place where a passenger's clothes are touched.

Conventionally, pile knitted fabrics are generally made by cutting back and forth between the base fabrics by the ground yarns arranged in parallel at a predetermined distance and cutting the pile yarns knitted in zigzag at the center between the two base fabrics. The cut portion is raised and raised from the surface of the base fabric.

When such pile knitted fabric is used as a skin material for automobile seats or the like, friction between the occupant and clothes of the passenger causes frictional electrification, and discharge easily occurs between the occupant and a low-potential object. receive.

Therefore, conventionally, a part of the pile yarn is generally replaced with a conductive yarn so that the pile knitted fabric is partially made electrically conductive to prevent charging.

The electric charge due to friction flows to the conductive yarn to reduce the amount of electric charge so as not to give an occupant an electrostatic shock.

However, as described above, since the pile yarn is knitted between the two base fabrics and then cut at the center between the two base fabrics, when one conductive yarn replaced in place of the pile yarn is cut, the other pile yarn is cut. The naps are arranged at the same raised intervals as the yarns (intervals between adjacent protruding ends of the pile yarns).

Therefore, since the protruding ends having a predetermined length are arranged very close to each other, the amount of conductive yarn used is large and it is not economical, and since they are concentrated in one line, the conductive yarn appears as it is in the appearance. It looks bad.

Therefore, the applicant of the present application has proposed a prior art (Japanese Patent Laid-Open No. 63-203848) in which a conductive yarn is woven into a part of the ground yarn so that both ends of the conductive yarn are projected toward the pile portion. ing.

 An embodiment of the same example is shown in FIGS. 1 and 2.

The ground yarn 01 is composed of a plain weave weft yarn 02 and a warp yarn 03, a pile yarn 04 is woven between the warp yarns 03, and the pile yarn 04 is interwoven with the intermediate portion 04a. At the same time, both end portions 04b, 04b project in one direction and are cut to the same size to form a pile portion.

Then, for each predetermined number of warp yarns 03 of the ground yarn 01, conductive yarns 05 are woven into the weft yarns 02 instead of the warp yarns 03, the conductive yarns 05 are cut at predetermined intervals, and both ends 05b, 05b are pile portion side. It is projected and is cut to the same size.

As the conductive thread 05, for example, a thread in which conductive carbon black, tin oxide or other fine metal particles are dispersed in a synthetic fiber thread, or a thread in which a synthetic fiber thread is metal-plated is used.

In the case where the pile yarn is simply replaced with the conductive yarn, the raised interval is narrow and the amount of the conductive yarn used is large, whereas the conductive yarn can increase the raised interval and the amount of the conductive yarn used is reduced accordingly. To be done.

In addition, the protruding ends of the conductive yarns are mostly scattered on the surface base fabric formed by raising the pile yarns, so that the conductive yarns do not appear as they are in the appearance and the appearance is not deteriorated.

Problems to be Solved However, since a part of the ground yarn is made into conductive yarn and both ends are projected, in the actual manufacturing, the conductive fabric is cut only in some places in the base cloth once woven, and the end portion thereof is cut. Is required to be lifted to the surface side (pile part side) of the skin material, which is very complicated.

Since the conductive thread is cut in places, it does not contribute to the strength of the ground thread.
The strength of the fabric as a whole in the warp direction is reduced by the amount of the ground yarn using the conductive yarn.

In addition, the ground yarn having the normal conductivity is not formed by the conductive yarn alone, but is twisted with other yarns for the ground yarn (rayon, polyester-rayon mixed yarn, etc.) to form one ground yarn. When you lift both ends of this conductive thread,
This rayon or polyester-rayon mixed yarn appears on the surface, and these ground yarns have lower light resistance than polyester and nylon constituting the pile yarn, and therefore the appearance may deteriorate after long-term use.

The present invention has been made in view of the above points, and an object thereof is to provide an antistatic interior material for an automobile, which is easy to manufacture, does not reduce the strength of the entire fabric, and can maintain its appearance even after long-term use. In point.

Means and Actions for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an automobile interior material using a pile knitted fabric in which a pile yarn is woven into a ground yarn, and a part of the pile yarn has conductivity. Made up of yarn,
The middle part of the pile yarn having the same conductivity is woven multiple times with the ground yarn, and both ends of the pile yarn are protruded to the front side of the interior material and napped. Is an antistatic interior material for automobiles, in which the gap is greater than the raised intervals of other pile yarns.

When knitting the pile yarn into the ground yarn, the knitting method can be freely set depending on the adjustment of the knitting machine.Therefore, change the knitting position of the conductive pile yarn used instead of the pile yarn at regular intervals, and change the position. The raised area can be easily adjusted by cutting the changed part, which improves productivity.

Furthermore, since the pile yarn having conductivity is trimmed to the same length as the raised length of the other pile yarns, it is sufficient to trim all the pile yarns without distinction, which reduces the number of work steps and the work itself.

Since the pile yarn is made of conductive yarn and the ground yarn is the same as before, the strength of the base fabric is not reduced, and the middle portion of the conductive pile yarn is replaced with the ground yarn. Since it is woven multiple times, it has a reinforcing effect on the base fabric.

The conductive pile yarn is twisted together with the conductive yarn and the pile yarn (polyester, nylon, etc.) to form a single yarn, so it has light resistance and looks like other pile yarns for long-term use. Does not reduce.

Embodiment An embodiment of the present invention shown in FIGS. 3 to 6 will be described below.

This embodiment is an example in which the interior material of the present invention is used for the seat cover 4 used in the vehicle seat 1 shown in FIG. 3, and the seat cover 4 is used for both the seat back 2 and the seat cushion 3. Is used.

FIG. 4 is a partially enlarged plan view of the seat cover 4, and FIG. 5 is a sectional side view of the same.

The ground yarn 5 is a synthetic fiber such as rayon or polyester.
Rayon mixed yarn is used, and weft yarn 6 and warp yarn 7 of ground yarn 5 are used.
Ordinary plain weave does not reduce the strength of the entire base cloth because there are no special places even in parts.

A plurality of pile yarns 8 are interwoven with the weft yarns 6 between the adjacent warp yarns 7 of the ground yarn 5 to cover the surface of the ground yarn 5.

The pile yarn 8 is made of polyester, nylon or the like and has light resistance.

The pile yarn 8 is fixed at the intermediate portion 8a to the weft yarn 6 and is
8b, 8b are protruded to the front side and cut into the same size to form a pile portion having a constant thickness.

Then, a part of the pile yarn 8 is used as a conductive pile yarn.

The conductive pile yarn is a synthetic fiber yarn in which carbon black, tin oxide, or other fine metal particles are dispersed as a core material, and a polyester, which is a material for the ordinary pile yarn 8, is used as a sheath. The pile yarn having conductivity is hereinafter referred to as a conductive yarn 9.

The conductive yarn 9 is provided between the adjacent warp yarns 7 like the normal pile yarn 8 and is interwoven with the weft yarns 6. However, the intermediate portion 9a is woven into the weft yarns 6 like the warp yarns 7 so that both end portions 9b have a constant length. , 9
The b is protruded to the front side, and is cut and trimmed to the same size as the raised length of the normal pile yarn 8 and raised.

One conductive thread 9 has its middle portion 9a woven into seven weft threads 6, and seven weft threads 6 are opened in the same row, and another conductive thread 9 is woven into seven weft threads 6 again. Since they are periodically woven at intervals, the napped distance d ₁ of the end portion 9b of the conductive yarn 9 in the warp direction is substantially constant.

Further, since the conductive yarn 9 is woven in the weft direction at an interval of approximately d ₂ , the nap distance in the weft direction of the end portion 9b of the conductive yarn 9 is d.
_2, thus raising intervals of the conductive yarn 9 d ₁ in the warp direction and d ₂ in the weft direction.

Such weaving of the conductive yarn 9 can be easily performed by adjusting the knitting machine.

FIG. 6 is a simplified cross-sectional view of the sheet skin 4 in one step of the manufacturing process of the sheet skin 4, and the warp yarn 7 and the normal pile yarn 8 are omitted.

The base fabrics of the base yarns 5 are vertically arranged in parallel with each other at a constant interval, and the conductive yarns 9 woven into the base yarns 5 of one base fabric for a predetermined length are next attached to the base yarns 5 of the other base fabric. If the knitting machine is properly adjusted such that the knitting machine is moved to the predetermined length and then woven into the ground yarn 5 of the original base fabric again and woven for the predetermined length, this operation can be repeated. When the knitted conductive yarn 9 is cut at the center between the base fabrics of both the ground yarns 5, the conductive yarn 9 (and the pile yarn 8) are provided on the surfaces facing each other.
The two sheet skins 4 which are raised are formed. Thus, the weaving and raising of the conductive yarn 9 can be easily performed, and the seat cover 4 can be easily manufactured.

The sheet skin 4 thus manufactured has the conductive yarn 9 woven in places of the ground yarn 5, so that the amount of the conductive yarn 9 used is small.

The raised distance d is 0.5 cm, 0.7 cm, 1.0 cm, 2.
The following table shows the amount of charge and the amount of conductive yarn used when the distance is 0 cm.

Here, the charge amount is the result of a test based on the Japanese Industrial Standard JIS L1094C method, and the test method is a method in which a test piece is rubbed with a friction cloth to be frictionally charged, and then the generated charge amount is measured.

On the other hand, in the case of a conventional pile knitted fabric in which the nap intervals of the conductive yarns are arranged in the longitudinal direction at the nap intervals of the normal pile yarns and the nap intervals of 1.0 cm in the lateral direction, the charge amount is 3.6 μc / m.
^{In 2} , the amount of conductive yarn used was 6 g / m ² .

Among the pile knitted fabrics of the present invention tested this time, the amount of conductive yarn used is 4.0 g / m ² and the amount of conductive yarn used is 6 g / m ² which is 6 g / m ² which is the same as the conventional one even if the raised spacing d is 0.5 cm in both the longitudinal and longitudinal directions
In addition, the amount of charge is 1.8 μc / m ^{2, which} is much smaller than the conventional 3.6 μc / m ² despite the small amount of conductive thread used, and the conductivity is extremely good and the effect of preventing electrostatic shock to passengers is great. .

In addition, since the conductive yarn 9 has a conductive core material covered with a polyester sheath, it has excellent light resistance similarly to the other pile yarns 8. Absent.

In the above embodiments, no conductive material-like material is provided on the back side of the pile knitted fabric, but a conductive backing material may be integrally provided on the back surface.

This backing material can be easily obtained by mixing and finely dispersing carbon powder particles in an ordinary backing resin.

When the back of a pile knitted fabric in which conductive pile yarns are woven in some places is lined with a conductive backing material, the electric charges on the conductive yarns flow to the backing material and are discharged, resulting in more charging. The amount will be lower and the electrostatic shock can be prevented more reliably.

It is even more effective if the backing material is grounded to the body or the like.

The result of measuring the charge amount of the clothes after a person actually sits on the automobile seat 1 and drives the automobile shows that the charge amount of 36 KV is obtained when the seat cover 4 is not used. Seat back 2 and seat cushion 3
Antistatic sheet skin 4 with backing material on the entire surface of
It shows a very low electrostatic charge of 7 KV when used with, and it can be seen that the effect of preventing electrostatic shock is great.

Although this is a place where the antistatic seat skin 4 with a backing material is used, even when the antistatic seat skin 4 is used only for the seat cushion 3 of the automobile seat 1, a charge amount of 9 KV and a considerable charge. Has a preventive effect.

However, when the antistatic seat skin 4 is used only for the seat back 2 instead of the seat cushion 3, the electrification amount of 23 KV is less effective than the attached area.

Further, in FIG. 7, when the antistatic seat cover 4 with the backing material is used only on the door side (right side) bank portion 3a (hatched portion) of the seat cushion 3, the charge amount of 11 KV is measured. The result shows that the antistatic effect is extremely large compared to the installation area.

The above result is obtained because the place where the clothes rub most when a person gets in or out of the car is the door side bank portion 3a of the seat cushion 3, and the antistatic seat cover 4 is provided only on the bank portion 3a. By using it, the cost can be kept low.

During operation, the front end 3b of the seat cushion 3 (the grid-shaped part in Fig. 7) is the part where the clothes are most rubbed, and the metal parts inside the vehicle, such as switches and seat slide levers, should be discharged. Therefore, it is more effective to use the antistatic seat skin 4 on the front end portion 3b of the seat cushion 3 as well.

Therefore, by using the antistatic seat skin 4 on the bank portion 3a and the front end portion 3b of the seat cushion 3, it is possible to obtain a large antistatic effect and at the same time be economically superior.

Effect of the Invention According to the present invention, since a part of the pile yarn in the automobile interior material is made of conductive yarn, manufacturing is simplified and time and labor can be saved. As it is, the strength of the entire cloth can be maintained and further strengthened.

In addition, since the nap spacing on the surface side of the interior material of the pile yarn having conductivity is made larger than the nap spacing of other pile yarns, the amount of conductive yarn used is small and the amount of electrification is small even though it is economical. It can prevent electrostatic shock sufficiently and has excellent appearance.

Furthermore, both ends of the pile yarn having the same conductivity are raised to the front side of the interior material and raised, and the pile yarn having the special conductivity can be trimmed to the same length as the raised length of the other pile yarn. There is no need for a process of shortening, it is sufficient to cut and arrange all pile yarns without distinction,
Moreover, the work itself is simple and the manufacturing is extremely easy.

By attaching a conductive backing material to the surface of the interior material, electrostatic shock can be more reliably prevented.

[Brief description of drawings]

1 is a partially enlarged plan view of a conventional pile knitted fabric, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is an automobile to which an interior material of one embodiment according to the present invention is applied. FIG. 4 is a perspective view of the seat, FIG. 4 is a partially enlarged plan view of the interior material, and FIG.
FIG. 6 is a cross-sectional view taken along line VV in FIG. 6, FIG. 6 is a cross-sectional view showing a step in the manufacturing process of the interior material, and FIG. 7 is a perspective view of a vehicle seat of another embodiment. 1 ... Automotive seat, 2 ... Seat back, 3 ... Seat cushion, 4 ... Seat skin, 5 ... Ground thread, 6 ...
... weft, 7 ... warp, 8 ... pile, 9 ... conductive.

Claims (2)

(57) [Scope of utility model registration request] 1. In an automobile interior material using a pile knitted fabric in which pile yarns are woven into ground yarns, a part of the pile yarns is constituted by conductive yarns, and an intermediate portion of the conductive pile yarns is formed. Are woven multiple times into the ground yarn, both ends of which are raised toward the interior material front side and raised, and are trimmed to the same length as the raised length of the other pile yarns, and the raised intervals are greater than the raised intervals of other pile yarns. An antistatic interior material for automobiles characterized by being made larger. 2. The antistatic interior material for automobiles according to claim 1, wherein a conductive backing material is additionally provided on the back surface of the interior material.