JP3417345B2 - Fabric for airbag components and method of preparing airbag sewing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a sewing method of preparing raw and the air bag for a vehicle for airbags components.

[0002]

2. Description of the Related Art As an air bag for a vehicle, there is known an air bag having a substantially quadrangular pyramid shape and a long rectangular blow-in port provided at the top thereof. FIG. 2 shows an example of the above-mentioned airbag 1, in which the belt-shaped cloth la having a width in the central portion in the length direction wider than both ends is curved in a U-shape and is provided on the left and right side edges thereof. A substantially triangular side cloth lb, lb is sewn on to form a substantially pyramid-shaped bag body, and a laterally long rectangular blowing roll lc provided on the top of the bag body has a bag-like shape on each of the horizontal and vertical sides. Mounting cloths 2a and 2b are attached.

The above-mentioned airbag 1 is made by coating a woven fabric made of synthetic fibers with a synthetic resin to obtain a raw fabric, and then punching out parts such as the band-shaped cloth la and the side cloth lb, or by making the above-mentioned raw fabric into the above-mentioned components. It was made by applying a paper pattern of No. 1 to cut and then sewing the obtained parts together.
In addition, recently, it has been attempted to use uncoated synthetic fiber woven fabric as a raw material. In this case, in order to prevent the warp or the weft from fraying at the cutting end, a heated blade or a laser beam is used. Alternatively, the fabric is cut while being melted with an ultrasonic tool.

Then, the obtained airbag is spread on a plane as shown in the upper half of FIG. 3, for example, and the portion outside the vertical extension of the blowing roll lc is placed on the outside. As shown in the lower half, a plurality of diffractions are made on the lower side of the strip-shaped cloth la (see the dotted line), and the entire airbag 1 is formed in a strip shape having the same width as the width of the insufflation port lc, and then the right half of FIG. As shown in the section, the belt-like portions before and after the blow-in port lc are folded in a bellows shape,
Compress and invert to the lower side of the blow roll (see the lower left of Fig. 4), stack it into a compact rectangular parallelepiped shape, store it in an airbag case (not shown), and mount it as described above. The cloths 2a and 2b were fixed to the opening of the airbag case.

[0005]

In such an airbag 1, an airbag component, for example, a band-shaped cloth 1a and left and right side cloths 1b, 1b are sewn together to form a bag body (or a single bag body). (The bag body may be constructed by appropriately sewing the components.)
However, there is a problem that dragging or wrinkling occurs at the sutured portion unless the suture is accurately performed.

Further, the above-mentioned parts are not provided with a mark for indicating a position where a fold line is to be formed when the airbag is sewn after folding or a mounting reference point when the airbag is attached to the folding device. Therefore, the position of the folds and the mounting position with respect to the folding device vary, and the initial folding amount is insufficient, and the bag part sticks out sideways from the belt-like part at a predetermined number of times, for example, two times on one side. There was a problem that the folding amount became too large and the part became bulky.

According to the present invention, the airbag component parts are provided with markings for use as stitching or folding marks, so that the airbag component parts can be sewn together, and the airbag which is finally sewn can be folded. It is something that was made.

Further, the present invention is a method for preparing an airbag component by cutting a fabric raw material made of synthetic fiber,
By fusing with a laser beam while conveying the above-mentioned fabric raw material with a conveyor, even if the above-mentioned fabric raw material does not have a synthetic resin coating layer, fraying does not occur due to cutting, and immediately after fusing By printing the sewing mark and the folding mark on the above parts on the same conveyor, it is possible to accurately print these marks, so that the sewing and the folding after the sewing can be performed accurately. It is a thing.

[0009]

Means for Solving the Problems] raw for an air bag component of claim 1 is a raw for an air bag components that constitute the bag body of the air bag by being stitched, the in raw, the airbag components
Goods are marking <br/> grayed reference points are granted only at the margin of the other locations are cut, for folding the suture marks and / or air bag of the air bag component in relation to the marking reference points The mark can be added.

According to a second aspect of the vehicle airbag sewing preparation method of the present invention, the raw fabric is spread and conveyed to the fusing region and the marking region in order, and the raw fabric is preset in the fusing region. Along with melting into the shape of the bag component, a marking reference point is attached only to the blank area other than the airbag component, and then in the marking area, the marking reference point is detected and the airbag component is attached. The stitching marks and / or the folding marks of the airbag, which are preset in relation to the marking reference point, are printed.

The woven fabric raw material used in the present invention is a woven fabric in which synthetic fiber yarns are used for warp yarns and weft yarns, and may or may not have a synthetic resin coating layer on the surface. The fusing region is a region for fusing the raw fabric by moving the laser beam in the length direction and the width direction of the raw fabric by computer control, and the marking region is the fusing region for fusing the raw fabric. This is an area for pre-printing with a marking robot the sewing marks and the airbag folding marks obtained by sewing on the parts obtained by the above.The above fusing area and marking area are provided in sequence along the conveyor. To be

The above-mentioned fusing region is set to have a width such that at least one airbag component, for example, the above-mentioned strip cloth or side cloth can be arranged on the raw fabric in the region, but one airbag is provided. It is desirable that the size of each part is set as a unit, and the size can be set so that an integral number can be arranged. It is preferable that the marking area is set to have the same width as the fusing area, and the working time in the fusing area and the working time in the marking area are substantially equal to each other.

The laser processing machine used for fusing is of a type in which a laser beam directed perpendicularly to the original fabric is moved in the length direction and width direction of the original fabric like the XY plotter, or in the horizontal direction. It is possible to use a type in which the laser beam of (1) is reflected by an oscillating mirror and directed toward the original fabric web, and the inclination of the oscillating mirror is controlled by a computer. When the fusing region is wider than the movable range of the laser beam, the laser processing machine can be sequentially fed in the length direction or the width direction according to the movable range to perform the fusing. Further, the position of the marking reference point for punching with the laser beam is preferably near the center of the fusing region.

The marking robot used for marking is equipped with a photoelectric sensor capable of detecting the marking reference point perforated by the laser beam, for example, a vidicon camera, and the marking reference point detected by the sensor. Based on this, a desired mark can be printed on the set position with a felt-tip pen, etc.
5 mm points, circles or crosses are preferred. The same mark or a mark having a different size or shape may be used as the stitching mark for instructing the mating portion of the parts and the folding mark for instructing the crease portion of the fold.

[0015]

The operation is obtained from the original fabric for the airbag component of the present invention.
Since Ma <br/> King as described later in the air bag components are subjected to, by utilizing a marking attached to the airbag component, each two airbag adjacent components thereof It is possible to bring it to an accurate relative position and to bring it into contact with each other in this state, and it is possible to prevent dragging and wrinkles from occurring after the end of sewing. Also, by using this marking when folding the airbag after sewing, there is no variation in the position of the folds or the mounting position with respect to the folding device, and the initial folding amount is insufficient or a part of the bag is strip-shaped. It is possible to avoid the problem that the bag protrudes to the side, or conversely, the initial folding amount becomes too large and a part of the bag becomes bulky.

[0016] In the raw for an air bag component of claim 1, the marking for a sewing case or folding of the margin portion except portions where the air bag components are cut
Can be applied accurately and easily in relation to the marking reference points .

In the method for preparing sewing of a vehicle airbag according to a second aspect of the present invention, a marking reference point is detected, and based on the marking reference point, the airbag parts are sewn together and the airbag is folded. The marking can be printed at the exact position as originally designed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 10 is a slat conveyor made of aluminum honeycomb-like perforated plate, 11 is a woven fabric raw material made of synthetic fiber, and the woven fabric raw fabric 11 is placed on the slat conveyor 10 in a spread state. And is intermittently conveyed upward in the drawing (in the direction of arrow P), and sequentially passes through the fusing region 20 and the marking region 30 indicated by the dotted-dotted rectangle,
When the belt conveyor 10 is stopped, the melting by the laser beam occurs in the melting area 20 and the marking area 3 again.
At 0, printing is performed by the marking robot.

The fusing area 20 is a processing area of a carbon dioxide laser processing machine, in which a laser beam is moved by computer control and parts for two airbags, that is, one belt-like shape are designed according to a previously input design. The body 12 and the two sets of side cloths 13, 13 are set to be fused by one set. This fusing region 20
The strip 12 and the two side cloths 13 and 13 drawn with a chain double-dashed line on the right side of the left side of FIG.
Strips 12a and two side cloths I drawn in solid lines in rows
3a and 13a have shown the components after fusing. The black dots 21 around the side cloth 13 on the upper right are the positions of the laser beam, and show the state in which the left parts 12a and 13a are melted and moved to the right. A white circle 22 attached to the margin between the upper ends of the left and right strips 12 and 12a is a marking reference point.

While the two sets of parts (two strips of cloth 12a and four side cloths 13a) are melted from the fabric material 11 in the melt-cutting region 20, and the marking reference points 22 are punched, In the marking area 30, the marking is performed by the marking robot. This marking area 3
On the right side of 0 , the strip 12a and the two side cloths 13a, 13a immediately after moving from the fusing region 20 are drawn in one row. The white circle 31 attached to the right side cloth 13a is a marking tool (felt pen) of the marking robot.
The position is shown, and the imprint has moved to the right after the printing on the left is completed. Further, on the left side, the belt-like cloth 12b and the side cloths 13b, I having both the stitching mark 32 for mutual airbag parts and the airbag folding mark 33 are attached.
3b is shown in column 1.

The suturing mark 32 and the folding mark 33 are detected by the vidicon camera of the marking robot to detect the marking reference point 22 and then preset in the computer based on the marking reference point 22. Printing is performed by moving the above printing tool to the position where the printing is performed and hitting it.

When the fusing and marking are performed as described above, the band-shaped cloths 12b and the side cloths 13b are collectively taken out from the belt conveyor 10 one by one and conveyed to the sewing process. In the sewing process, the stitching marks 32 printed on the band-shaped cloth 12b and the stitching marks 32 printed on the side cloth 13b are sewn together at corresponding positions. When the sewing is completed, the airbag is inspected and then the folding mark 33 is attached to the airbag.
Fold based on the product.

[0023]

INDUSTRIAL APPLICABILITY The original fabric for the airbag component of the present invention
In addition, marking can be done accurately and easily
Is. In the airbag component obtained from this original fabric, it is possible to bring two adjacent airbag components to their correct relative positions by using the marking, and to attach them in this state, and to finish sewing. It is possible to prevent later occurrence of dragging and wrinkling. Further, by using this marking when folding the airbag after sewing, uniform folding becomes possible.

In the vehicle airbag sewing preparation method according to the present invention , the marking reference points are detected, and based on the marking reference points, the stitching markings between the airbag parts and the folding markings of the airbag are initially performed. It is printed at the exact position as designed.

[0025] Keep <br/> sewing preparation method for a vehicle air bag of the present invention, made of a synthetic fiber fabric raw transported placed on a conveyor, the preset airbag parts the fabric raw The shape is melted by a laser beam, a marking reference point is punched in the margin, then the marking robot is moved based on the marking reference point, and the airbag parts are left on the conveyor at the time of melting. In the case of printing the stitching marks for the airbag parts and the folding marks for the airbag, the airbag parts are taken out from the fabric raw material in the exact shape as designed, and the fabric raw fabric is made of resin. The warp or weft of the cut traces does not fray whether it is coated or not. Since the above-mentioned airbag parts are printed with the sewn marks for mutual parts and the folding marks for the airbag at the exact positions as originally designed, it is easy to sew by using the above sewn marks. It is possible to obtain an airbag free from dragging and wrinkles, and by using the above-mentioned folding mark, individual differences in attachment to the folding device are eliminated, and folding is easy, and there is no individual difference. A simple folding shape can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a fabric original fabric showing an embodiment.

FIG. 2 is a perspective view of an airbag.

FIG. 3 is a plan view showing how to fold an airbag.

FIG. 4 is a front view of an airbag that is folded into a bellows.

[Explanation of symbols]

10: Belt conveyor, 11: Fabric raw fabric made of synthetic fiber,
12, 12a, 12b: band-shaped cloth, 13, 13a, 13
b: side cloth, 20: fusing region, 21: laser beam,
22: Marking reference point, 30: Marking area, 3
1: Marking robot's printing tool, 32: Marks for sewing parts to each other, 33: Marks for folding airbags.

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-50-136846 (JP, A) JP-A-3-16049 (JP, A) JP-A-5-221278 (JP, A) JP-A-5- 270337 (JP, A) JP 5-213138 (JP, A) JP 4-66437 (JP, A) Actual flat 5-92002 (JP, U) Actual flat 6-18105 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60R 21/16

Claims (2)

(57) [Claims] 1. A raw for an air bag components that constitute the bag body of the air bag by being stitched, in this raw, only in the margin of the other portion where the airbag components are cut marking <br/> reference point and is given, that no way may confer marks for folding suture marks and / or air bag of the air bag component in relation to the marking reference points Original fabric for characteristic airbag components . 2. An unrolled raw material is spread and conveyed to the fusing region and the marking region in order, and in the fusing region, the raw fabric is fused and cut into a preset shape of an airbag component, and the airbag is also provided. Marking reference points are attached only to the margins other than the parts, and then the above-mentioned marking reference points are detected in the above-mentioned marking area, and the above-mentioned marking reference points are applied to the above-mentioned airbag parts. A method for preparing sewing of an airbag for a vehicle, comprising printing a stitching mark for airbag parts and / or a folding mark for an airbag, which are set in advance in association with each other.