JP6238443B2 - Airbag sewing jig - Google Patents

Description

The present invention relates to an airbag sewing jig , and more particularly to an airbag sewing jig capable of improving the sewing accuracy.

  It has become common for vehicles such as automobiles to be equipped with an airbag device for inflating and deploying an airbag in the vehicle in the event of an emergency such as a collision or sudden deceleration to absorb the impact generated on the passenger. Yes. Such an airbag apparatus generally includes an airbag that is normally folded and accommodated in a vehicle structure and inflated and deployed in an emergency, and an inflator that supplies gas to the airbag.

  The above-described airbag is formed into a bag having a predetermined shape by sewing a woven fabric (usually referred to as “base fabric”) having a high strength, heat resistance, and low air permeability, cut into a predetermined shape. The The base fabric is often sewn with a sewing machine, and various jigs are used to improve the sewing accuracy. For example, Patent Literature 1 and Patent Literature 2 include a lower pressing plate having a location pin and a sewing opening, and an upper pressing plate having a through hole and a sewing opening that can be inserted into the location pin. A jig is disclosed.

Japanese Patent Laid-Open No. 5-116575 Japanese Patent Laid-Open No. 11-278188

  The above-described sewing jigs described in Patent Document 1 and Patent Document 2 temporarily position a base cloth on a location pin and position the base cloth to be sewn between a lower presser plate and an upper presser plate. Like to do. Such a sewing jig can perform positioning substantially accurately when performing simple sewing of an outer peripheral portion of an airbag, an opening for an inflator, or the like, and can improve sewing accuracy.

  By the way, for example, the last bag closing portion of the airbag needs to be sewn so that a gap is not generated as much as possible. However, in the final bag closing portion, the shape error of the base fabric, the sewing error, and the like are accumulated, and the shape of the opening portion does not become the shape as designed, and it becomes easy to make wrinkles in the sewing portion.

  In addition, a sewing part for forming an opening formed on the suture line of the airbag (for example, an inflator insertion passage such as a vent hole or a curtain airbag) has a function if the opening is not formed as designed. May be affected. Therefore, in an airbag having such an opening, a stitching accuracy higher than that of a normal sewing portion is required.

The present invention has been devised in view of such problems, and an object thereof is to provide a sewing jig for an airbag capable of improving the sewing accuracy.

According to the present invention, in an airbag sewing jig formed in a bag of a predetermined shape by sewing a base fabric of a predetermined shape, a first plate having a location pin and a first sewing opening; A second plate having a through hole formed at a position substantially coincident with the location pin and a second sewing opening formed at a position substantially coincident with the first sewing opening; and disposed on the first plate A tension member including a rod-like member inserted into the opening of the airbag and a moving means for moving the rod-like member, and fixing the airbag on the first plate. The opening of the airbag is deformed into a flat shape by the tension generating means, and the airbag is sandwiched by fixing the second plate from above the airbag. D Sewing jig bag is provided.

  The moving means includes a rail that is fixed on the first plate, a slider that is movably disposed on the rail, and an elastic body that applies a biasing force to the slider. The slider may be disposed on a side surface of the slider. Further, the rod-shaped member may be bent in the pulling direction. The first plate may have a guide member for guiding the position of the opening of the airbag.

According to the airbag sewing jig according to the present invention described above, when sewing the airbag opening or the peripheral edge thereof, the opening is formed by pulling the opening laterally and deforming it into a flat shape. The outer edge length in a pair of base fabric which comprises a part can be made substantially corresponded, and generation | occurrence | production of a wrinkle can be suppressed. Therefore, even if it is a functional opening such as an opening or a vent hole in which the shape error or sewing error of the base fabric is accumulated, the shape of the opening can be forcibly adjusted and the sewing accuracy can be improved. Can be achieved.

It is a figure which shows a part of jig | tool for sewing of the airbag which concerns on 1st embodiment of this invention, (A) is a top view of a 1st plate, (B) shows the side view of a tension | tensile_strength generating means. Yes. It is a figure which shows a part of jig | tool for sewing of the airbag which concerns on 1st embodiment of this invention, (A) is a top view of a 2nd plate, (B) combines the 1st plate and the 2nd plate FIG. It is a figure which shows the jig | tool for the sewing of the airbag which concerns on 2nd embodiment of this invention, (A) is a top view of the 1st plate, (B) has shown the top view of the 2nd plate. It is a top view which shows the sewing method of the airbag which concerns on embodiment of this invention, (A) is the state which fixed the airbag to the 1st plate, (B) is the state which inserted the rod-shaped member in the opening part of the airbag (C) The state which deform | transformed the opening part of the airbag into the flat shape, (D) The state which fixed the 2nd plate. It is a top view which shows the jig | tool for the sewing of the airbag which concerns on other embodiment of this invention, (A) has shown 3rd embodiment, (B) has shown 4th embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is a view showing a part of a sewing jig for an airbag according to the first embodiment of the present invention, (A) is a plan view of the first plate, and (B) is tension generating means. FIG. FIG. 2 is a view showing a part of the airbag sewing jig according to the first embodiment of the present invention, in which (A) is a plan view of the second plate, and (B) is the first plate and the second plate. The top view of the state which combined the plate is shown.

  The airbag sewing jig 1 according to the first embodiment of the present invention is a bag having a predetermined shape by sewing a base fabric having a predetermined shape as shown in FIGS. 1 (A) to 2 (B). A sewing jig for the airbag 2 formed on the body, the first plate 11 having a location pin 11a and a first sewing opening 11b, and a through hole 12a formed at a position substantially coincident with the location pin 11a. And a second plate 12 having a second sewing opening 12b formed at a position substantially coinciding with the first sewing opening 11b, and disposed in the first plate 11 and inserted into the opening 21 of the airbag 2. A tension generating means 3 having a rod-shaped member 31 and a moving means 32 for moving the rod-shaped member 31. The airbag 2 is fixed on the first plate 11. Change the opening 21 of the bag 2 into a flat shape And, in which so as to sandwich the airbag 2 by further fixing the second plate 12 from the top of the airbag 2. Refer to FIG. 4 for the positional relationship with the airbag 2.

  The 1st plate 11 is a flat plate member arrange | positioned at the lower surface of the airbag 2, for example, is formed with resin materials, such as a plastics. On the surface of the first plate 11, a location pin 11 a for fixing the second plate 12 and the airbag 2 is erected. The location pin 11 a may be configured by a metal bolt or rivet fixed from the back surface of the first plate 11, or may be formed integrally with the resin material of the first plate 11. The arrangement and the number of the location pins 11a are appropriately changed depending on the shape of the airbag 2 to be sewn and the sewing location, and are not limited to the illustrated arrangement and the number.

  The first plate 11 has a first sewing opening 11b through which a sewing machine needle can be inserted. The illustrated first sewing opening 11 b has a shape suitable for sewing the last bag closing portion of the airbag 2. The first sewing opening 11 b is generally formed so as to penetrate the first plate 11. In addition, the shape of the opening part 11b for 1st sewing is suitably changed according to the sewing location of the airbag 2. FIG.

  The first plate 11 may have a guide member 11 c that guides the position of the opening 21 of the airbag 2. The guide member 11 c has a wall surface portion that extends in the pulling direction so that the position of the opening 21 does not shift when the airbag 2 is pulled by the tension generating means 3. For example, the wall surface portion of the guide member 11c is formed along a straight line X indicated by a one-dot chain line in the drawing. The arrangement and number of guide members 11c are appropriately changed depending on the shape of the airbag 2 to be sewn and the sewing location, and are not limited to the arrangement and number shown in the figure.

  Further, the tension generating means 3 is disposed on the surface of the first plate 11 at a position separated from the location pin 11a. As shown in FIGS. 1A and 1B, for example, the moving means 32 constituting the tension generating means 3 is arranged so as to be movable on the rail 32a and the rail 32a fixed on the first plate 11. And the elastic body 32c for applying a biasing force to the slider 32b.

  As for the rail 32a, the both sides along a longitudinal direction are return | folded inside. The slider 32b is a rectangular parallelepiped member that is elongated in the extending direction of the rail 32a, and has a flange portion 32d that protrudes from the left and right sides on the bottom surface. The slider 32b is slidably disposed with respect to the rail 32a by inserting the flange portion 32d through the folded portion of the rail 32a.

  A support pin 32e is erected on one end of the rail 32a, and an engagement pin 32f is erected on the upper surface of the slider 32b. An elastic body 32c is stretched between the support pin 32e and the engagement pin 32f. The elastic body 32c is, for example, a coil spring, but may be an elastic body such as rubber. The support pin 32e is disposed at a substantially central portion of the rail 32a, and the shaft portion also functions as a stopper for the slider 32b.

  Note that the configuration of the moving means 32 is not limited to the illustrated configuration, and it is sufficient that the slider 32b is configured to be movable along the straight line X. For example, a stopper capable of fixing the slider 32b may be arranged instead of the elastic body 32c, and the slider 32b may be fixed manually at a desired position by moving the slider 32b manually.

  As illustrated, the rod-shaped member 31 is disposed on the side surface of the slider 32b. Since the rod-shaped member 31 is inserted into the opening 21 of the airbag 2 and deforms the opening 21 into a flat shape, the rod-shaped member 31 preferably has a pin shape with a round outer periphery. With this configuration, friction between the base fabric of the airbag 2 and the rod-shaped member 31 can be reduced.

  Moreover, the rod-shaped member 31 may be bent in the pulling direction. As shown in FIG. 1A, the rod-shaped member 31 has a substantially L shape, and is fixed to the slider 32b so that the bent portion 31a is arranged on the straight line X. With this configuration, one end of the opening 21 of the airbag 2 can be securely locked to the bent portion 31a of the rod-shaped member 31, and the rod-shaped member 31 can be prevented from coming off. In addition, when the rod-shaped member 31 is formed linearly, it is preferable that the rod-shaped member 31 is arranged in a state perpendicular to the side surface of the slider 32b or in a state where the tip end portion is inclined in the pulling direction.

  The 2nd plate 12 is a flat plate member arrange | positioned at the upper surface of the airbag 2, for example, is formed with resin materials, such as a plastics. Since the second plate 12 is a member fixed to the first plate 11 from above the airbag 2 fixed on the first plate 11, the location pin 11 a formed on the first plate 11, the guide member 11 c, It is necessary not to interfere with the tension generating means 3. Therefore, the second plate 12 is formed with a through hole 12a through which the location pin 11a can be inserted, an opening 12c through which the guide member 11c can be inserted, and a notch 12d for avoiding interference with the tension generating means 3.

  The second plate 12 is formed with a second sewing opening 12b through which a sewing machine needle can be inserted. The illustrated second sewing opening 12b has a shape suitable for sewing the last bag closing portion of the airbag 2, and matches the shape of the first sewing opening 11b described above. Is formed.

  Here, the state which combined the 2nd plate 12 with the 1st plate 11 is shown to FIG. 2 (B). In addition, in this figure, the figure of the airbag 2 is abbreviate | omitted. As shown in the drawing, the second plate 12 is fixed on the first plate 11 by inserting the location pin 11a and the guide member 11c of the first plate 11 into the through hole 12a and the opening 12c of the second plate 12, respectively. be able to.

  Next, an airbag sewing jig according to a second embodiment of the present invention will be described with reference to FIGS. 3 (A) and 3 (B). Here, FIG. 3 is a figure which shows the jig | tool for the sewing of the airbag which concerns on 2nd embodiment of this invention, (A) is a top view of a 1st plate, (B) is a top view of a 2nd plate. , Shows. In addition, about the component in common with 1st embodiment mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The sewing jig 1 according to the second embodiment shown in FIGS. 3A and 3B has a plurality of magnets 4 and 4 ′ for fixing the first plate 11 and the second plate 12. is there. As shown in FIG. 3A, the first plate 11 has a plurality of magnets 4 fitted on the opposite side of the guide member 11c and the tension generating means 3 with the first sewing opening 11b interposed therebetween. Further, as shown in FIG. 3B, the second plate 12 has a plurality of magnets 4 'fitted on the opposite side of the through hole 12a and the opening 12c with the second sewing opening 12b interposed therebetween. Yes.

  The magnets 4, 4 ′ are configured to be attracted to each other when the second plate 12 is fixed on the first plate 11. By arranging the magnets 4 and 4 ', the first plate 11 and the second plate 12 can be brought into close contact with each other by the attractive force of the magnets 4 and 4' even when the airbag 2 is sandwiched. It is possible to suppress the positional deviation of the airbag 2 during the sewing work or before shifting to the sewing work. Only one of the magnets 4 and 4 'may be a magnet, and the other may be a metal piece.

  By the way, the sewing jig 1 according to the first embodiment described above does not have the magnets 4 and 4 ′, but after the second plate 12 is fixed on the first plate 11 and the airbag 2 is sandwiched. The outer edges of the first plate 11 and the second plate 12 may be clamped by a fixture such as a clip, or a cap may be put on the top of the location pin 11a to prevent the second plate 12 from coming off. .

  Then, the sewing method of the airbag 2 using the sewing jig 1 which concerns on 2nd embodiment mentioned above is demonstrated, referring FIG. 4 (A)-(D). Here, FIG. 4 is a plan view showing the airbag sewing method according to the embodiment of the present invention, in which (A) is a state in which the airbag is fixed to the first plate, and (B) is an opening portion of the airbag. The state which inserted the rod-shaped member in (C), the state which deform | transformed the opening part of the airbag into the flat shape, (D) The state which fixed the 2nd plate is shown.

  The sewing method of the airbag 2 shown in FIGS. 4A to 4D is a sewing method of the airbag 2 formed in a bag body of a predetermined shape by sewing a base fabric of a predetermined shape. The bag 2 has an opening 21, and the opening 21 is deformed into a flat shape by pulling the opening 21 in at least one direction, and a base fabric forming the opening 21 is sewn. Specifically, the airbag 2 is sewn using the sewing jig 1 according to the above-described embodiment. In the following description, the sewing jig 1 according to the second embodiment shown in FIG. 3 is used.

  First, the airbag 2 is fixed to the first plate 11 as shown in FIG. Specifically, the tab 22 having the through hole of the airbag 2 is inserted into the location pin 11a of the first plate 11, and the airbag 2 is arranged on the first plate 11 so that the opening 21 is along the guide member 11c. To do. That is, in this process, the airbag 2 is fixed by inserting the location pin 11 a around the opening 21.

  Next, as shown in FIG. 4B, the slider 32 b of the tension generating means 3 is inserted into the opening 21 of the airbag 2. Specifically, the slider 32 b is moved in a direction (arrow direction in the figure) to approach the location pin 11 a against the urging force of the elastic body 32 c, and the tip of the rod-shaped member 31 is inserted into the opening 21. At this time, it is preferable that the end of the opening 21 is locked at the position of the bent portion 31 a of the rod-shaped member 31.

  Then, as shown in FIG. 4 (C), the opening 21 of the airbag 2 is pulled in the lateral direction by the tension generating means 3. Specifically, the opening portion 21 of the airbag 2 is pulled in the lateral direction by moving the slider 32b in the direction away from the location pin 11a (opposite direction) by the urging force of the elastic body 32c. At this time, one end of the opening 21 is fixed to the location pin 11a and is pulled in the opposite direction by the tension generating means 3, so that the opening 21 is deformed into a flat shape so that the upper base cloth and the lower base cloth stick together. Thus, wrinkles generated at the outer edge of the opening 21 can be removed.

  Finally, as shown in FIG. 4D, the second plate 12 is fixed from above the airbag 2 on the first plate 11. Specifically, the through hole 12a of the second plate 12 is inserted into the location pin 11a of the first plate 11, the opening 12c of the second plate 12 is inserted into the guide member 11c of the first plate 11, and the first plate 11 is inserted. And the second plate 12 are brought into close contact with each other, whereby the second plate 12 is fixed on the first plate by the attractive force of the magnets 4 and 4 '.

  Therefore, by using the sewing jig 1 described above, the airbag 2 can be clamped in a flat plate shape while suppressing the generation of wrinkles at the outer edge of the opening 21, and can be easily set in a sewing device such as a sewing machine. The airbag 2 can be sewn appropriately.

  That is, according to the sewing method of the airbag 2 using the sewing jig 1 according to the above-described embodiment, when the opening portion 21 of the airbag 2 or the peripheral portion thereof is sewn, the opening portion 21 is arranged in the lateral direction. By pulling to a flat shape, the outer edge lengths of the pair of base fabrics constituting the opening 21 can be made substantially coincident, and the generation of wrinkles can be suppressed. Therefore, even if the opening 21 has a functionality such as the opening 21 or the vent hole in which the shape error or sewing error of the base fabric is accumulated, the opening 21 can be forcibly adjusted to a flat shape. It is possible to improve the stitching accuracy.

  Next, a sewing jig 1 for an airbag 2 according to another embodiment of the present invention will be described with reference to FIGS. 5 (A) and 5 (B). Here, FIG. 5 is a plan view showing an air bag sewing jig according to another embodiment of the present invention, in which (A) shows a third embodiment and (B) shows a fourth embodiment. ing. In addition, about the component in common with embodiment mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The sewing jig 1 according to the third embodiment shown in FIG. 5A is used, for example, when the slit 23 is formed in the opening 21 of the airbag 2. Specifically, the slit 23 is formed as an opening having a length S by sewing a part of both ends of the opening 21 of the airbag 2.

  By using such a sewing jig 1, the shape accuracy of the slit 23 can be improved, and the slit 23 having the length S can be accurately sewn. Therefore, for example, when the slit 23 is used as a vent hole, the function of the slit 23 can be maintained, such as opening and closing according to the design value or securing a gas exhaust amount as the design value. it can.

  The sewing jig 1 according to the fourth embodiment shown in FIG. 5B is used when the throat 24 is formed in the opening 21 of the airbag 2. Specifically, the throat 24 has a cylindrical opening having a width W when flattened (a radius when inflated and deployed) by sewing a part of both ends of the opening 21 of the airbag 2 into a substantially L shape. A cylindrical opening having a circular cross section of W / π). In the present embodiment, the first sewing opening 11b and the second sewing opening 12b are formed in an L-shape with one end bent downward in the figure, but bent upward in the figure. It may be L-shaped.

  By using such a sewing jig 1, the shape accuracy of the throat 24 can be improved, and the cylindrical throat 24 with a radius W / π can be sewn accurately. Therefore, when the throat 24 is used as a gas flow path, a gas flow path as designed can be secured, and when the throat 24 is used as an inflator insertion path, the gap with the inflator is minimized. The function of the throat 24 can be maintained.

  The first plate 11 and the second plate 12 shown in the third embodiment and the fourth embodiment are the same as those in the second embodiment described above, and the first sewing opening 11b and the second sewing opening 12b. It has the same configuration except for the shape.

  The present invention is not limited to the above-described embodiments, and can be applied to all airbags such as a driver airbag, a passenger airbag, a side airbag, a curtain airbag, and the like. Of course, various changes can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Sewing jig 2 Air bag 3 Tension generating means 4, 4 'Magnet 11 First plate 11a Location pin 11b First sewing opening 11c Guide member 12 Second plate 12a Through hole 12b Second sewing opening 12c Opening 12d Notch portion 21 Opening portion 22 Tab 23 Slit 24 Throat 31 Bar-shaped member 31a Bending portion 32 Moving means 32a Rail 32b Slider 32c Elastic body 32d Hook 32e Support pin 32f Engagement pin

Claims (4)

In an air bag sewing jig formed in a bag of a predetermined shape by sewing a base fabric of a predetermined shape,
A first plate having a location pin and a first sewing opening;
A second plate having a through hole formed at a position substantially coincident with the location pin and a second sewing opening formed at a position substantially coincident with the first sewing opening;
A tension member provided on the first plate, the rod member inserted into the opening of the airbag, and a moving means for moving the rod member;
The airbag is fixed on the first plate, the opening of the airbag is deformed into a flat shape by the tension generating means, and the second plate is fixed from above the airbag. I tried to pinch
An air bag sewing jig characterized by the above. The moving means includes a rail that is fixed on the first plate, a slider that is movably disposed on the rail, and an elastic body that applies a biasing force to the slider. The airbag sewing jig according to claim 1 , wherein the jig is disposed on a side surface of the slider. 2. The airbag sewing jig according to claim 1 , wherein the rod-shaped member is bent in a pulling direction. 2. The airbag sewing tool according to claim 1 , wherein the first plate has a guide member that guides a position of an opening of the airbag . 3.