JP2014040222A - Skin material for seat and seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin material and a seat for improving a degree of freedom of seat cover design, by simplifying a process when installing a side airbag device.SOLUTION: The skin material 11 for the seat of the present invention is a skin material for a seat for covering an airbag module arranged on at least one side of both sides inside of a seat body with an airbag, and is composed of double-woven knit cloth having a binding part A and a nonbinding part B, and is formed so that an expansion starting point 12 of the cleavable airbag module is set in the binding part A of the double-woven knit cloth, and the airbag module is held in a storage state by both-side nonbinding parts B continuing from the binding part A of the woven cloth on the side for contacting with the airbag module.

Description

  TECHNICAL FIELD The present invention relates to a seat skin material and a seat equipped with an airbag that is installed in a vehicle and instantly inflates to protect an occupant in the event of a vehicle collision, and more particularly, to a seat skin material in a side airbag and Regarding the sheet.

  2. Description of the Related Art In recent years, an airbag device has been widely used as a safety device for protecting an occupant from an impact when a vehicle collides. The airbag device instantly inflates into the space between the occupant and the interior structure at the time of collision, and has a function of absorbing the impact when the occupant directly collides with the instrument panel, side door, handle, etc. . Therefore, as an airbag device, a sensor that detects rapid deceleration when receiving an impact such as a vehicle collision, an inflator that generates a high-pressure gas for inflation by receiving a signal from the sensor, and an inflation from the inflator An air bag body that is inflated and deployed by the high-pressure gas for reducing the impact of the occupant and a diagnostic circuit that determines whether or not the air bag system is functioning normally are provided.

  As an airbag that protects an occupant from a side collision, there is a side airbag device. As shown in FIG. 1, an airbag module 7 including an airbag bag body, an inflator, and the like is mounted inside a seat 1 (hereinafter sometimes simply referred to as a “seat”). It is a mechanism in which the body breaks through the cover of the seat 1 and deploys. From which part of the cover the airbag bag body is deployed is determined by an open seam provided in the cover. The opening seam portion is formed more vulnerable to tension than the other portions, and the seam is opened by the energy when the airbag bag body is deployed, and the airbag bag body is deployed therefrom.

  The cover of the seat 1 is formed into a three-dimensional shape by combining a plurality of skin parts by sewing or the like. When installing a side airbag device, it is necessary to provide a seam portion that opens at an appropriate position in the seat cover in order to use the airbag bag as a starting point for deployment, but this reduces the degree of freedom in seat cover design. ing. Moreover, when this seam part must be provided in addition to the sewing of parts necessary for the three-dimensional shape (for example, reference numeral 10 in FIGS. 4a and 4b), the sewing process is increased. 3a, 3b, 4a, and 4b schematically show a cross section of a side airbag installation portion of the seat.

  Therefore, in order to improve the degree of freedom of seat cover design and simplify the sewing process, a method of using a knitted fabric with a jersey structure as a skin material and providing a weakened portion with the knitted structure as a deployment starting point is disclosed in Patent Document 1. And 2 and the like.

  By the way, in the side airbag device, in order to transmit the deployment energy of the airbag bag body to the deployment start point, the deployment direction is controlled by a part called a batter. As shown in FIGS. 4A and 4B, the webbing 23 is usually composed of a plurality of band-shaped parts, and one end portion is sewn near the deployment start point 22. The other end is fixed to the seat frame 8 or joined to each other. The folded airbag bag body 6 is accommodated in the force cloth 23 (FIG. 4a). The energy that the airbag bag body 6 intends to deploy is directed to the deployment start point 22 due to the presence of the force cloth 23 that blocks the deployment in the other direction, so that the airbag bag body 6 deploys through the deployment start point 22 ( FIG. 4b).

  The process of housing the airbag module 7 in the force cloth 23 is actually complicated. First, the airbag bag body 6 assembled with the inflator 9 is folded to form an airbag module 7 and attached to the seat frame 8. Separately, the ends of each of the two parts of the force cloth 23 are sewn in the vicinity of the deployment start point 22 of the skin material 23 constituting the seat cover, and a plurality of skin material parts are combined to create a seat cover. After attaching a cushion material to the seat frame 8 and covering the seat cover, the other end portions of the webbing 23 are sewn together so as to surround the airbag module 7, or the other end of the webbing 23. A fixing tool such as a hook is coupled to each portion, and the hook is hooked on the seat frame 8 and fixed so as to cover the airbag module 7.

  Until simplification of such a complicated process, it is not mentioned in Patent Document 1, and the webbing 23 itself needs to be attached separately.

  Moreover, in Patent Document 2, as an example of using a double jersey double knitted fabric, a set-up portion extending inward from the development starting point is formed on the back side knitted fabric holding the airbag module, and this set-up is performed. It is described that the use of the portion for the bundling can eliminate the bundling process. However, when using the set-up portion from the above-mentioned starting point of development, the force acting on the webbing when the airbag is inflated first acts in the direction of peeling the back side knitted fabric of the double knitted fabric from the front side knitted fabric. Therefore, in order to overcome this force and cleave the front side knitted fabric, it is easy to cleave the front side knitted fabric portion of the unfolding origin by a method such as reducing the strength of the yarn knitting the front side knitted fabric or the knitting density. Must be configured. However, since the front side knitted fabric is a surface that directly contacts the occupant when used as a car seat, it needs strength against friction and is not preferable to be weakened as described above, and may be subject to design restrictions. It is not preferable.

Japanese Patent Laid-Open No. 10-24799 JP 2000-24344 A

  An object of the present invention is to solve the above-described problems, and to provide a skin material and a sheet that simplify the process for attaching a side airbag device and improve the degree of freedom of seat cover design. .

  According to the present invention, the seat skin material for covering the airbag module disposed on at least one side of the both sides inside the seat body with the airbag according to claim 1, comprising a connecting portion and a non-connecting portion A deployment start point of a tearable airbag module is set at a joint portion of the double woven fabric, and continuous from the joint portion of the woven fabric on the side in contact with the airbag module. It is related with the sheet | seat skin material formed so that an airbag module may be hold | maintained in the accommodation state by the non-connecting part of the both sides which do.

  According to the skin material having this configuration, the appearance of the seat cover is good because the presence of the airbag module deployment start point is not confirmed from the surface side of the seat cover while the airbag module is provided with a deployment starting point. In addition, when the airbag is inflated, the force acting on the non-joined portion of the woven fabric holding the airbag module is pulled in the direction of expanding the deployment starting point through the joined portion of the double woven fabric. Thus, even if the other knitted fabric or the development starting point on the front side does not have a fragile configuration, the portion of the development starting point can be reliably cleaved. Accordingly, the seat cover can be designed freely. Moreover, since it is not necessary to sew the fabric on the skin material, the process of attaching the side airbag device can be simplified.

  According to the second aspect of the present invention, the end portions of the non-connected portion of the woven fabric on the side in contact with the airbag module are joined together so as to cover at least a part of the airbag module. It is desirable to keep the module in the stowed state. Thereby, an airbag module can be held reliably.

  According to a third aspect of the present invention, it is desirable that the deployment start point is formed by providing a cleavage assisting portion on a woven or knitted fabric on the side in contact with the airbag module holding the airbag module.

  According to claim 4, it is desirable that the double woven fabric is a double warp knitted fabric. In the case of a double warp knitted fabric, it is easy to form a knitted structure with low extensibility.

  Moreover, according to Claim 5, it is related with the sheet | seat which has a seat cover comprised including the said skin material.

  ADVANTAGE OF THE INVENTION According to this invention, the process at the time of attaching a side airbag apparatus is simplified, and the skin material and sheet | seat with which the freedom degree of the seat cover design was improved can be provided.

It is a perspective view of a seat with a side airbag device. It is the schematic diagram which showed the cross section of the skin material of this invention which covers the airbag module of a seat seat. It is a schematic diagram explaining the accommodation condition of the side airbag at the time of using the skin material of this invention. It is a schematic diagram explaining the side airbag deployment situation at the time of using the skin material of this invention. It is a schematic diagram explaining the accommodation situation of the conventional side airbag. It is a schematic diagram explaining the conventional side airbag deployment condition.

  The seat skin material 11 of the present invention is used for a cover (seat cover) of the seat 1 shown in FIG. 1 equipped with an airbag, particularly a side airbag, in a vehicle. Specifically, the airbag module 7 disposed on at least one side of both sides 4 (left and right portions) inside the seat body is covered. The seat cover is formed into a three-dimensional shape according to the form of the seat 1 by combining a plurality of material parts including the seat covering material 11 of the present invention by means such as sewing. Reference numeral 2 denotes a headrest, reference numeral 3 denotes a seat back surface, reference numeral 5 denotes a seat seating surface, and reference numeral 8 denotes a seat frame.

  As shown in FIG. 2, the skin material 11 of the present invention is composed of a double woven fabric of woven and knitted fabrics 13a and 13b. The type of double woven fabric is not particularly limited, and double woven fabric such as warp double woven fabric, weft double woven fabric and weft double woven fabric, double warp knitted fabric such as double denby and double raschel, double jersey, etc. Can be used. Especially, it is preferable that it is a double Russell at the point that formation of the knitting structure | tissue with a low elongation rate is easy. The woven structure and the knitted structure are not particularly limited. Moreover, the sheet | seat cover surface side of the skin material 11 of this invention may be brushed or resin-processed.

  In the present invention, as shown in FIG. 3 a, the woven / knitted fabric 13 a accommodates the airbag module 7, and serves as a webbing for controlling the deployment direction of the airbag bag body 6. That is, the deployment energy of the airbag bag body 6 is transmitted from the woven / knitted fabric 13a to the deployment start point 12 described later, and the airbag bag body 6 is split. The airbag module 7 is accommodated in the woven / knitted fabric 13a as shown in FIG. 3a, in addition to the state where the airbag module 7 is completely covered by the woven / knitted fabric 13a. Including the state. When the airbag module 7 is completely covered with the woven / knitted fabric 13a, for example, both ends of the woven / knitted fabric 13a are connected to each other as shown in FIG. 3A, or the both ends are fixed to the same portion of the seat frame 8. When only a part of the airbag module 7 is covered with the woven / knitted fabric 13a, for example, both ends of the woven / knitted fabric 13a are fixed to locations separated from the seat frame 8.

  The airbag module 7 includes an inflator 9 that generates a high-pressure gas for inflating in response to a signal from a sensor that detects rapid deceleration when receiving an impact, and a high-pressure gas for inflating from the inflator 9. Are provided with a diagnostic circuit for determining whether or not the airbag system is functioning normally.

  The skin material 11 has a connecting portion A in which the woven and knitted fabrics 13a and 13b are connected by a connecting yarn, and a non-connecting portion B that is not connected.

  In the connecting portion A, a deployment start point 12 of the airbag bag body 6 is formed. The unfolding starting point 12 has a cleavage assisting portion 12a. The cleavage assisting portion 12a is a portion that does not have warp or weft partially due to the woven or knitted structure, or a warp that partially differs in tensile strength or shear strength. You may form by providing the part which has a weft, and you may form by creating the slit which is not penetrated with a laser, a heat cutter, etc. Especially, it is preferable to form by providing the part which does not have a thread | yarn by a woven structure or a knitting structure at the point which a process is simplified.

  Since the skin material 11 of the present invention is composed of a double woven knitted fabric, only the woven knitted fabric 13a on the side in contact with the airbag module 7 which is the back surface of the double woven knitted fabric when used as a seat cover, The cleavage assisting portion 12a can be formed. In addition, the force acting on the woven fabric 13a when the airbag bag body 6 is inflated works so as to cleave the deployment start point 12 via the connecting portion A of the double woven fabric. Therefore, it can be configured such that the presence of the airbag bag body 6 cannot be confirmed from the surface (woven / knitted fabric 13b) side of the seat cover while ensuring the deployment location of the airbag bag body 6. This improves the degree of freedom in seat cover design.

  As described above, the unfolding start point 12 is formed in the connecting portion A, but a bundling is not separately bonded in the vicinity thereof as in the conventional case. Therefore, it is not necessary to consider the joining margin to the deployment start point 12 of the bundling. However, in the present invention, it is necessary to maintain a certain degree of joint strength between the woven and knitted fabrics 13a and 13b, and the unevenness of the airbag module 7 installed in the seat 1 is on the seat cover surface side. It is preferable that the width of the joint portion A is about 30 mm to 100 mm in that the double woven knitted portion can be used as a cushioning material so as not to appear.

  When the seat cover is configured as described above, in the manufacturing process of the seat cover, it is not necessary to go through a separate step of sewing a blanket to the skin material 11, and the process can be simplified.

  The woven / knitted fabric 13a for accommodating the airbag module 7 is a long woven / knitted fabric having a certain width. The width may be a width that can accommodate the airbag module 7, and is preferably about 10 mm to 60 mm.

  It is preferable that the woven / knitted fabric 13a on the side in contact with the airbag module 7 serving as a force cloth has an elongation rate of 110% or less in the tearing direction so as to control the deployment direction of the airbag bag body 6. When the stretch rate exceeds 110%, the woven / knitted fabric absorbs the deployment energy of the airbag bag body 6, and the opening portion of the airbag bag body 6 is delayed even when the tearing portion does not open. Therefore, it tends to be difficult to normally restrain the passenger. The elongation rate is more preferably 80% or less, and particularly preferably 50% or less. Moreover, it is preferable that it is larger than 20%. This elongation rate is a numerical value for the direction in which the force for breaking the deployment start point 12 acts, and numerical values in other directions may not be taken into consideration. Further, the stretch rate is not particularly limited for the other woven or knitted fabric 13b.

  The sheet 1 of the present invention is manufactured as follows. First, the skin material 11 of the present invention constituting the seat cover is woven and knitted and subjected to a dyeing process or the like. This is cut into the shape of a part for the seat cover, and the part is combined with a plurality of other parts to create a three-dimensional seat cover. When the development starting point 12 is formed later, it is performed after the parts are cut. In addition, the parts which consist of skin materials other than the skin material 11 of this invention can be used for parts other than the side airbag deployment part. Separately, an airbag bag body 6 is created and an inflator 9 is assembled. Next, the airbag bag body 6 is folded and the inflator 9 is attached to the seat frame 8. Next, a cushion material is attached to the seat frame 8, and the seat cover is covered with a part of the opening for the remaining steps. Finally, the end portions of the two non-connecting parts B sandwiching the connecting part A in the skin material 11 of the present invention are joined so as to cover the airbag module 7, and the sheet is completed.

  The material constituting the skin material 11 of the present invention is not particularly limited, such as natural fiber, regenerated fiber, semi-synthetic fiber, synthetic fiber, and inorganic fiber, and these can be used in combination of two or more. Especially, it is preferable that it is a synthetic fiber from the point of physical property durability, such as light fastness, and it is more preferable that it is a polyester fiber.

A connection part
B Unconnected part
1 seat
2 Headrest
3 Seat back
4 Seat seat side
5 Seat surface
6 Airbag body
7 Airbag module
8 Seat frame
9 Inflator
10 Seat cover sewing section
11 Skin material
12 Deployment start point 12a Cleavage assisting parts 13a, 13b Woven knitted fabric
21 Skin material
22 Starting point
23

Claims (5)

  A seat skin covering an airbag module disposed on at least one side of a seat seat body with an airbag, comprising a double woven knitted fabric having a connecting portion and a non-connecting portion, The deployment start point of the tearable airbag module is set at the connection portion of the heavy knitted fabric, and the airbag is formed by the non-connection portions on both sides continuous from the connection portion of the woven fabric on the side in contact with the airbag module. A sheet skin material characterized by being formed so as to hold a module in an accommodation state.   Claims in which the airbag module is held in an accommodated state by joining the ends of the non-joined portions of the woven or knitted fabric on the side in contact with the airbag module so as to cover at least a part of the airbag module. Item 1. A skin material for a sheet according to Item 1.   3. The seat skin according to claim 1, wherein the deployment start point is formed by providing a tear assisting portion on a knitted fabric on a side in contact with the airbag module that holds the airbag module. 4. Wood.   The skin material for sheets according to any one of claims 1 to 3, wherein the double woven fabric is a double warp knitted fabric.   The sheet | seat which has a seat cover comprised including the skin material of any one of Claims 1-4.

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