JP4377855B2 - Collision protection device - Google Patents

Description

  The present invention relates to a collision object protection apparatus that absorbs an impact and protects the collision object when the vehicle collides with the collision object.

  A collision object protection device that absorbs and reduces the impact force applied to a collision object by inflating and deploying an air bag on the upper surface of the vehicle when a collision with the vehicle is detected or predicted. The air is composed of a cylindrical bag body in which a main body portion that inflates and expands along the two sides and a pair of pillar portions that are bent from both ends of the main body portion and expands and expands along the vicinity of the lower portion of the front pillar of the vehicle. There is an impact protection device with a bag.

In such a collision object protection device, one end of a strap extending in the vehicle width direction is prevented in order to prevent the pillar portion from fluttering in the vertical direction on the upper surface of the front pillar due to shaking generated when the pillar portion is inflated and deployed. Is attached to the vicinity of the base end of the pillar portion, and the other end portion is attached to the vehicle, so that the pillar portion is suppressed to the upper surface of the front pillar by a strap to prevent vertical flapping (for example, Patent Documents) 1).
Japanese Patent Laying-Open No. 2004-299442 (paragraph 0041, FIGS. 7 to 9)

  However, the conventional collision object protection device described above can prevent the vertical flapping that occurs when the pillar portion expands and deploys, but prevents the tip end portion of the pillar portion from falling down and shifting in the vehicle width direction. I couldn't. In particular, when the pillar portion is formed so as to cover the entire front pillar, the pillar portion is formed in a long shape along the front pillar, and the long pillar portion whose tip is not fixed is, There is a problem that the vehicle is likely to fall down in the vehicle width direction on the upper surface of the vehicle due to the shaking generated during the expansion and deployment, the wind pressure acting after the expansion and deployment, and the pressing force from the collision object.

  Accordingly, an object of the present invention is to solve the above-described problems and to provide a collision object protection device that can surely prevent displacement of the airbag inflated and deployed on the upper surface of the front pillar.

In order to solve the above-described problems, the present invention provides a collision object protection apparatus including an airbag that is inflated and deployed on the upper surface of a vehicle when a collision with the vehicle is detected or predicted. A body portion that inflates and expands along the lower portion of the front windshield of the vehicle, and a pair of pillar portions that are bent from both ends of the body portion and inflated and deployed along the front pillar of the vehicle. A curved inner peripheral surface portion is formed at the bent portion of the main body portion and the pillar portion, and when the pillar portion is inflated and deployed, the shape of the inner peripheral surface portion is maintained, so that the pillar portion is it is prevented from tilting outward in the width direction, Oite outside surface serving as a vehicle width direction outer side of the pillar portion, a proximal end portion serving as a starting point for tilting the occurrence of the pillar portion in the vicinity of the bent portion, the pillar portion When the That is to resist longitudinal stretching, it is characterized in that the elongation reducing means for preventing the pillar portion is inclined inward in the vehicle width direction are provided.

  Here, when the pillar portion is inflated and deployed, the pillar portion is easily tilted inward in the vehicle width direction due to the influence of the flow of the gas supplied to the inside of the pillar portion. When the inflated and expanded pillar portion is about to fall toward the inside in the vehicle width direction, the pillar portion is elongated in the longitudinal direction on the outer side surface that is the outside in the vehicle width direction.

  In the collision object protection apparatus of the present invention described above, the elongation reducing means that resists the elongation in the longitudinal direction generated in the outer surface portion of the pillar portion is provided, and the elongation in the longitudinal direction generated in the outer surface portion is reduced. When the part tries to fall inward in the vehicle width direction, tension is generated on the outer side surface part, and this tension causes the pulling force to act on the pillar part to the outside in the vehicle width direction. The part stays on the upper surface of the front pillar.

Further, the pillar portion is formed by bending from both end portions of the main body portion that expands and develops along the lower portion of the front window glass.In the expanded bent portion, the inner peripheral surface portion that is the inner side in the vehicle width direction is It has the property of maintaining its shape, and is particularly difficult to deform toward the outside in the vehicle width direction. Therefore, the pillar portion is supported by the bent portion without falling down toward the outside in the vehicle width direction. It will stay on top of the pillar.
In addition, since the effect which maintains the shape increases when the internal peripheral surface part used as the inner side of a vehicle width direction in a bending part is formed in the shape curved gently, the support force of a pillar part can be raised.

  As described above, even if the pillar portion is formed in an elongated shape along the front pillar by providing an extension reducing means for reducing the elongation in the longitudinal direction generated in the outer side surface portion of the expanded and deployed pillar portion. Since the inflated and deployed pillar portion can be prevented from falling and shifting in the vehicle width direction, the front pillar can be reliably covered with the airbag.

  In addition, by preventing displacement of the expanded and expanded pillar part, it is not necessary to take into account the pillar part deviation in advance when creating the pillar part, and the width of the pillar part need not be widened, thereby reducing the size of the airbag. Therefore, the inflator that supplies the gas for inflating and deploying the airbag can be made small, and can be easily mounted on the vehicle.

  Here, the tilt in the vehicle width direction of the expanded and expanded pillar portion is greatly influenced by the fact that the rigidity of the portion that is the starting point of the tilt is low. Therefore, by providing an extension reducing means near the starting point of the occurrence of tilting and increasing the tension near the starting point, the pillar portion can be effectively prevented from falling in the vehicle width direction. Since the starting point of the tilting of the pillar part is the base end part in the vicinity of the bent part of the main body part and the pillar part on the outer side surface part which is the outer side in the vehicle width direction, the elongation reducing means is the tilting of the pillar part. It is desirable to provide it in the vicinity of the base end that is the starting point of occurrence.

  In the above-described collision object protection device, the elongation reducing means can be configured by a strap having one end attached to the outer surface portion of the pillar portion and the other end attached to the vehicle.

  As described above, when the extension reducing means is constituted by the outer surface portion of the pillar portion and the strap attached to the vehicle, the outer surface portion of the pillar portion is strapped when the longitudinal extension occurs in the outer surface portion of the pillar portion. Since the tensile force is received from the vehicle via the vehicle, the elongation of the outer surface portion can be reliably reduced.

  In addition, when the strap is extended along the longitudinal direction of the pillar portion, the joint portion between the outer surface portion of the pillar portion and the strap can be widely secured, and the expanded and expanded pillar portion is located on the inner side in the vehicle width direction. Since the tension generated in the outer side surface portion can be increased over a wide range when it is about to fall down, even if the pillar portion is elongated along the front pillar, It is possible to effectively prevent the vehicle from falling in the vehicle width direction.

  Furthermore, by changing the length of the strap, the strength of the tension generated on the outer surface portion can be easily finely adjusted when the expanded and expanded pillar portion is about to fall toward the inner side in the vehicle width direction. Therefore, it is possible to prevent the inflated and deployed pillar part from being pulled by the strap and falling outside in the vehicle width direction, and the front pillar can be reliably covered by the pillar part.

  In the above-described collision object protection device, the elongation reducing means can be configured by a stitched portion obtained by folding and sewing a part of the outer surface portion of the pillar portion.

In this way, when the elongation reducing means is configured by the stitched portion that is formed by folding and sewing a part of the outer surface portion of the pillar portion, the length in the longitudinal direction of the outer surface portion is reduced by the stitched portion. When the pillar portion is inflated and deployed, tension is generated in the outer surface portion, and the longitudinal elongation generated in the outer surface portion is reduced by this tension.
And since the stitching | suture part which is an elongation reduction means can be provided when sewing an airbag, the man-hour at the time of mounting a collision object protection apparatus in a vehicle can be reduced.

  In addition, it is not necessary to attach the extension reducing means to the vehicle, and when the airbag is inflated and deployed, there is no possibility that the extension reducing means is caught on a part of the vehicle and hinders the inflation and deployment. The collision object protection device can be easily attached to the vehicle.

  In the above-described collision object protection device, the elongation reducing means can be configured by a pasting portion in which a cloth that is less likely to stretch than the outer surface portion of the pillar portion is pasted to the outer surface portion.

In this way, when the elongation reducing means is configured by the pasting portion in which the cloth that is harder to stretch than the outer side surface portion of the pillar portion is pasted to the outer side surface portion, the longitudinal stretch generated in the outer side surface portion is pasted to the outer side surface portion. Will be reduced.
And since the bonding part which is an elongation reduction means can be provided when sewing an airbag, the man-hour at the time of mounting a collision object protection apparatus in a vehicle can be reduced.
The material and form of the cloth that is harder to extend than the outer surface part of the pillar part is not limited, and the cloth can be expanded and contracted by using a cloth with a fabric weight, or a cloth sewn with a reinforcing thread. Sex can be adjusted.

  In addition, it is not necessary to attach the extension reducing means to the vehicle, and when the airbag is inflated and deployed, there is no possibility that the extension reducing means is caught on a part of the vehicle and hinders the inflation and deployment. The collision object protection device can be easily attached to the vehicle.

According to the collision object protection device of the present invention, the elongation reducing means that resists the elongation in the longitudinal direction generated in the outer surface portion of the pillar portion is provided, and the elongation in the longitudinal direction generated in the outer surface portion is reduced. When the part tries to fall inward in the vehicle width direction, tension is generated on the outer side surface part, and this tension causes the pulling force to act on the pillar part to the outside in the vehicle width direction. The part stays on the upper surface of the front pillar.
Further, the pillar portion is formed by bending from both end portions of the main body portion that expands and develops along the lower portion of the front window glass.In the expanded bent portion, the inner peripheral surface portion that is the inner side in the vehicle width direction is It has the property of maintaining its shape, and since the bent portion is difficult to deform toward the outside in the vehicle width direction, the pillar portion is supported by the bent portion without falling down toward the outside in the vehicle width direction. Will stay on top of the front pillar.
In this way, by providing the extension reducing means on the outer side surface portion of the pillar portion, even if the pillar portion is formed elongated along the front pillar, the pillar portion expanded and deployed in the vehicle width direction. It can be prevented from falling and slipping, and the front pillar can be reliably covered by the airbag, so that when the vehicle collides with a collision object, the impact force applied to the collision object is reliably absorbed and relaxed. be able to.
In addition, by preventing displacement of the expanded and expanded pillar part, it is not necessary to take into account the pillar part deviation in advance when creating the pillar part, and the width of the pillar part need not be widened, thereby reducing the size of the airbag. Therefore, the inflator that supplies the gas for inflating and deploying the airbag can be made small, and can be easily mounted on the vehicle.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
1A and 1B are diagrams showing a collision object protection apparatus according to the present embodiment, in which FIG. 1A is a plan view of a state before the airbag is inflated and deployed, and FIG. 1B is a state after the airbag is inflated and deployed. It is a top view. 2A and 2B are diagrams showing the collision object protection apparatus of the present embodiment, in which FIG. 2A is a cross-sectional view taken along line AA in FIG. 1A, and FIG. 2B is a cross-sectional view taken along line BB in FIG. is there. FIG. 3 is an exploded perspective view showing the airbag in the collision object protection apparatus of the present embodiment. 4A and 4B are views showing the airbag in the collision object protection apparatus according to the present embodiment, in which FIG. 4A is a perspective view of the state before the strap is attached to the retainer, and FIG. 4B is a perspective view of the strap attached to the retainer. It is the perspective view which looked at the state from the back.

  In the present embodiment, when a vehicle, which is an automobile, collides with a colliding object while traveling, and the colliding object has a secondary collision with the upper surface of the front part of the vehicle, in order to absorb and relax the impact force applied to the colliding object. The collision object protection device mounted on the front part of the vehicle will be described as an example.

  As shown in FIG. 1, the collision object protection device 1 includes a collision determination device (not shown) that detects or predicts a collision between the vehicle 2 and the collision object, and the collision determination device detects or predicts a collision with the vehicle 2. The airbag 10 is inflated and deployed on the upper surface of the vehicle 2.

  The collision determination device is configured by an ECU (Electronic Control Unit) that detects or predicts a collision between the vehicle 2 and a collision object based on a signal from a sensor mounted on the vehicle 2 or a radar (not shown). When the collision with the vehicle 2 is detected or predicted, the inflators 20 and 20 that generate gas for inflating and deploying the airbag 10 are operated. In addition, the collision determination apparatus is configured using an existing apparatus, and the configuration is not limited.

  As shown in FIG. 1 (b), the airbag 10 is a cylindrical bag body, and a body portion 11 that inflates and deploys along the lower portion of the front window glass 2 a of the vehicle 2, and both end portions of the body portion 11. And a pair of pillar portions 12 and 12 that are inflated and deployed along the front pillars 2 b and 2 b of the vehicle 2.

  The airbag 10 before being inflated and deployed is stored in a folded state inside a retainer 2e disposed below the hood 2c of the vehicle 2 as shown in FIG. The retainer 2e opens at the front of the cowl top 2d, and the opening is closed by a lid 2f that forms the same surface as the cowl top 2d.

In the present embodiment, as shown in FIG. 1A, two inflators 20, 20 are attached to the main body 11, and the airbag 10 is inflated by the gas generated in each inflator 20, 20. Configured to deploy.
In this way, by inflating and deploying the entire airbag 10 by the gas generated in each inflator 20 and 20 attached to the main body part 11 without attaching the inflator 20 to the main body part 11 and each pillar part 12 and 12, respectively. Therefore, the collision object protection device 1 can have a simple configuration.
When the airbag 10 is inflated and deployed, as shown in FIG. 2B, the lid 2f (see FIG. 2A) is opened forward from the opening of the retainer 2e by the inflating force, and the vehicle 2 It expands and develops on the upper surface.

  As shown in FIG. 1B, each pillar portion 12, 12 of the airbag 10 is a cylindrical bag body that inflates and deploys in the vertical direction along each front pillar 2 b, 2 b of the vehicle 2. In addition, since each pillar part 12 and 12 is the same structure, the following pillar part 12 is demonstrated about the front side of the vehicle 2, and description about the left pillar part 12 is abbreviate | omitted in the following description.

  As shown in FIG. 3, in the pillar portion 12, a front end portion 13 a of a strap 13 extending along the longitudinal direction of the pillar portion 12 is attached to the outer side surface portion 12 a that is the outer side in the vehicle width direction. Specifically, the distal end portion 13a of the strap 13 is attached to the proximal end portion in the vicinity of the bent portion 12c between the main body portion 11 and the pillar portion 12 on the outer side surface portion 12a that is the outer side in the vehicle width direction. This attachment position is a part that becomes a starting point of occurrence of tilting when the expanded and expanded pillar portion 12 tilts in the vehicle width direction.

  The strap 13 has a distal end portion 13a stitched to the outer side surface portion 12a of the pillar portion 12, and a proximal end portion 13b attached to the retainer 2e of the vehicle 2 (see FIG. 2), which expands and deploys the pillar portion 12. In some cases, it is an elongation reducing means that resists the elongation in the longitudinal direction occurring in the outer surface portion 12a.

Here, as shown in FIG. 4A, the retainer 2e of the vehicle 2 (see FIG. 2) is formed with an opening 2g through which the strap 13 can be inserted, penetrating the rear surface portion. Below 2g, there is provided a hook 2h whose upper end is joined to the rear surface of the retainer 2e and whose lower end is separated from the rear surface.
When attaching the base end portion 13b of the strap 13 to the retainer 2e, the base end portion 13b of the strap 13 is inserted into the opening 2g from the inside of the retainer 2e, and an attachment hole 13c formed in the base end portion 13b of the strap 13 is formed. Is hooked on the hook 2h so that the base end portion 13b of the strap 13 can be easily attached to the retainer 2e.
In addition, the structure which attaches the base end part 13b of the strap 13 and the retainer 2e is not limited to the said structure, It can clamp | tighten with a volt | bolt and a nut, or can also join with a rivet.

The collision object protection apparatus 1 configured as described above operates as follows to achieve the effects of the present invention.
As shown in FIG. 1A, a collision determination device (not shown) detects or predicts a collision with the vehicle 2 based on a signal from a sensor mounted on the vehicle 2 or a radar (not shown). When this occurs, the collision determination device activates the inflators 20 and 20, and the airbag 10 is inflated on the upper surface of the vehicle 2 by the gas generated in the inflators 20 and 20, as shown in FIG. Will be deployed.

Here, when the pillar portion 12 is inflated and deployed, the pillar portion 12 is easily tilted inward in the vehicle width direction due to the influence of the flow of gas supplied to the inside of the pillar portion 12. In particular, when the pillar portion 12 is formed so as to cover the entire front pillar 2b (see FIG. 1A) as in the present embodiment, the pillar portion 12 is formed to be elongated along the front pillar 2b. As a result, the long pillar portion 12 whose tip is not fixed is inflated on the upper surface of the vehicle 2 due to the shaking generated when the inflated and deployed, the wind pressure acting after the inflated and deployed, and the pressing force from the collision object. It is easy to fall down in the width direction.
When the pillar portion 12 that has been inflated and expanded tends to fall toward the inside in the vehicle width direction, the pillar portion 12 is elongated in the longitudinal direction on the outer side surface portion 12a that is the outside in the vehicle width direction.

  At this time, in the collision object protection device 1 of the present embodiment, as shown in FIGS. 1B and 3, the strap 13 which is an extension reducing means that resists the extension in the longitudinal direction generated in the outer surface portion 12 a of the pillar portion 12. However, in the outer side surface portion 12a of the pillar portion 12, the base end portion in the vicinity of the bent portion 12c between the main body portion 11 and the pillar portion 12, that is, the starting point of the occurrence of tilting when the pillar portion 12 tilts in the vehicle width direction. Since the extension in the longitudinal direction generated in the outer surface portion 12a is reduced by the strap 13, when the pillar portion 12 tries to fall inward in the vehicle width direction, the outer surface portion 12a Tension will be generated. Then, a force pulled outward in the vehicle width direction acts on the pillar portion 12 by this tension, and the pillar portion 12 stays on the upper surface of the front pillar 2b (see FIG. 1A).

Further, the pillar portion 12 is formed by bending from both end portions of the main body portion 11 that inflates and expands along the lower portion of the front window glass 2a, and an inner periphery that is the inner side in the vehicle width direction at the expanded bent portion 12b. The surface portion 12b has a property of maintaining its shape, and since the bent portion 12c is difficult to deform toward the outside in the vehicle width direction, the pillar portion 12 falls down toward the outside in the vehicle width direction. Instead, it is supported by the bent portion 12c and remains on the upper surface of the front pillar 2b (see FIG. 1A).
In the present embodiment, since the inner peripheral surface portion 12b of the bent portion 12c is formed in a gently curved shape, the effect of maintaining the shape is increased, and the support force of the pillar portion 12 is increased. .

  Thus, in the collision object protection device 1, the pillar portion 12 is provided with the front pillar 2b (FIG. 1 (a) by providing the strap 13 that reduces the elongation in the longitudinal direction generated on the outer surface portion 12a of the expanded and expanded pillar portion 12. ))), It is possible to prevent the inflated and deployed pillar portion 12 from falling down and shifting in the vehicle width direction. Therefore, when the vehicle 2 collides with a collision object, the impact force applied to the collision object can be reliably absorbed and relaxed.

  Further, by preventing the displacement of the expanded and expanded pillar portion 12, when creating the pillar portion 12, it is not necessary to take into account the displacement of the pillar portion 12 in advance and to increase the width of the pillar portion 12. Since the bag 10 can be reduced in size, the inflator 20 (see FIG. 1A) that supplies gas for inflating and deploying the airbag 10 can be made small and easily mounted on the vehicle 2. be able to.

  Further, when the outer surface portion 12a of the pillar portion 12 is elongated in the longitudinal direction, the outer surface portion 12a of the pillar portion 12 receives a tensile force from the vehicle 2 through the strap 13, and therefore, the extension of the outer surface portion 12a. Can be reliably reduced.

  Further, a wide joint portion between the outer side surface portion 12a of the pillar portion 12 and the strap 13 extended along the pillar portion 12 can be secured, and the expanded and expanded pillar portion 12 falls inward in the vehicle width direction. When trying to do so, the tension generated in the outer surface portion 12a can be increased over a wide range. Therefore, even when the pillar portion 12 is formed elongated along the front pillar 2b (see FIG. 1A). It is possible to effectively prevent the pillar portion 12 from falling in the vehicle width direction.

  Furthermore, by changing the length of the strap 13, the strength of the tension generated in the outer side surface portion 12a can be easily finely adjusted when the expanded and expanded pillar portion 12 is about to fall inside the vehicle width direction. Therefore, it is possible to prevent the expanded pillar portion 12 from being pulled by the strap 13 and falling to the outside in the vehicle width direction, and the pillar 12 can reliably secure the front pillar 2b (see FIG. 1A). Can be covered.

  Note that the tilting of the expanded and deployed pillar portion 12 in the vehicle width direction has a great influence because the rigidity of the portion that becomes the starting point of the tilting is low. The starting point of occurrence of tilting of the pillar portion 12 is a base end portion in the vicinity of the bent portion 12c between the main body portion 11 and the pillar portion 12 in the outer surface portion 12a of the pillar portion 12, and in this embodiment, the pillar portion. Since the strap 13 is attached to the outer side surface portion 12a in the vicinity of the base end portion 12, when the inflated pillar portion 12 is about to fall inside in the vehicle width direction, the tension near the starting point of occurrence of tilting increases. Therefore, the pillar portion 12 that has been inflated and deployed is effectively prevented from falling in the vehicle width direction.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. 5A and 5B are views showing another embodiment, in which FIG. 5A is a perspective view of a state before inflating and deploying an airbag having a configuration in which a stitching portion is provided on the outer surface of the pillar portion, and FIG. 5B is inflating and deploying. FIG. FIG. 6 is a view showing another embodiment, and is a perspective view of a state before an airbag having a configuration in which a bonded portion is provided on the outer surface portion of the pillar portion before sewing.
For example, in the present embodiment, as shown in FIG. 3, by attaching the strap 13 having the base end portion 13 b attached to the vehicle 2 to the outer surface portion 12 a of the pillar portion 12, the longitudinal extension generated in the outer surface portion 12 a is increased. Although the elongation reducing means to reduce is constituted, as shown in FIG. 5B, the elongation reducing means can also be constituted by a stitched portion 14 in which a part of the outer surface portion 12a of the pillar portion 12 is folded and stitched together. .

  Specifically, by providing a stitched portion 14 in which a part of the outer surface portion 12a of the pillar portion 12 is folded and stitched together, the length in the longitudinal direction of the outer surface portion 12a is reduced. When inflated and deployed, tension is generated in the outer surface portion 12a, and elongation in the longitudinal direction generated in the outer surface portion 12a is reduced by this tension.

Such a stitching portion 14 can be provided when the airbag 10 is sewn as shown in FIG. 5A, so that the man-hour when the collision object protection device is mounted on the vehicle can be reduced.
Further, it is not necessary to attach the stitching portion 14 to the vehicle, and when the airbag 10 is inflated and deployed, there is no possibility that the stretch reducing means will be caught on the vehicle and hinder the inflation and deployment. The collision object protection device can be easily attached to the vehicle.

  Further, as shown in FIG. 6, the stretch reducing means can be constituted by a bonding portion 15 in which a cloth 15a that is harder to extend than the outer surface portion 12a of the pillar portion 12 is bonded to the outer surface portion 12a.

  Specifically, the stretch in the longitudinal direction generated in the outer surface portion 12a is bonded to the outer surface portion 12a by providing the bonding portion 15 by bonding the cloth 15a that is harder than the outer surface portion 12a of the pillar portion 12 to the outer surface portion 12a. This is reduced by the cloth 15a.

Since such a bonding portion 15 can be provided when the airbag 10 is sewn, it is possible to reduce the man-hour when the collision object protection device is mounted on the vehicle.
Further, similarly to the above-described stitching portion 14 (see FIG. 5A), it is not necessary to attach the bonding portion 15 to the vehicle, and when the airbag 10 is inflated and deployed, the stretch reducing means is caught on the vehicle and inflated and deployed. Therefore, it is not necessary to provide means for preventing such a state, and the collision object protection device can be easily attached to the vehicle.
In addition, the material and form of the cloth which is harder to extend than the outer side surface part 12a of the pillar part 12 are not limited, and by using a cloth with a fabric weight or by sewing a reinforcing thread. The elasticity can be adjusted.

It is the figure which showed the collision object protection apparatus of this embodiment, (a) is a top view of the state before inflating and deploying an airbag, (b) is a top view of the state after inflating and deploying an airbag. . It is the figure which showed the collision object protection apparatus of this embodiment, (a) is AA sectional drawing of Fig.1 (a), (b) is BB sectional drawing of FIG.1 (b). It is the disassembled perspective view which showed the airbag in the collision object protection apparatus of this embodiment. It is the figure which showed the airbag in the collision object protection apparatus of this embodiment, (a) is the perspective view which looked at the state before attaching a strap to a retainer from back, (b) is the state which attached the strap to the retainer back It is the perspective view seen from. It is the figure which showed other embodiment, (a) is a perspective view of the state before inflating and deploying the airbag of the structure which provided the stitching | suture part in the outer surface part of the pillar part, (b) is after inflating and deploying. It is a perspective view. It is the figure which showed other embodiment, and is a perspective view of the state before sewing the airbag of the structure which provided the bonding part in the outer surface part of the pillar part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Collision protective device 2 Vehicle 2b Front pillar 2e Retainer 10 Air bag 11 Main body part 12 Pillar part 12a Outer side surface part 13 Strap 20 Inflator

Claims (4)

A collision object protection apparatus comprising an airbag that inflates and deploys on the upper surface of the vehicle when a collision with a vehicle is detected or predicted,
The airbag is a tubular bag body, a main body portion that inflates and expands along a lower portion of the front windshield of the vehicle, and an air bag that is bent from both ends of the main body portion and expands along the front pillar of the vehicle. A pair of pillars to be deployed are formed,
A curved inner peripheral surface portion is formed in the bent portion of the main body portion and the pillar portion, and the shape of the inner peripheral surface portion is maintained when the pillar portion is inflated and expanded, so that the pillar portion Is prevented from tilting outward in the vehicle width direction,
Oite outside surface portion of the outer side in the vehicle width direction of the pillar portion, said at a base end portion serving as a starting point for tilting the occurrence of the pillar portion in the vicinity of the bent portion, the pillar portion when inflated deployed, The collision object protection apparatus according to claim 1, further comprising an extension reduction unit that resists the pillar portion from tilting inward in the vehicle width direction by resisting elongation in the longitudinal direction generated in the outer surface portion. 2. The collision object protection device according to claim 1, wherein the elongation reducing means is a strap having one end attached to the outer surface portion of the pillar portion and the other end attached to the vehicle. The collision object protection device according to claim 1, wherein the elongation reducing means is a stitched portion obtained by folding and sewing a part of the outer surface portion of the pillar portion. 2. The collision object protection device according to claim 1, wherein the elongation reducing unit is a bonding portion in which a cloth that is less likely to extend than the outer surface portion of the pillar portion is bonded to the outer surface portion.

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