JP2016078775A - Side door structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side door structure which enables improvement of side collision detection performance achieved by detecting atmospheric pressure change in a side door and inhibits the entire side door from intruding into the inner side in a vehicle width direction during a side surface collision.SOLUTION: A front side door 10 is formed including: a door inner panel 14 in which a service hole 18 is formed; and a service hole cover 30 attached to the door inner panel 14 and configured to close the service hole 18. The front side door 10 includes side collision detection means 70 which detects a side collision by detecting atmospheric pressure change in the side door. The service hole cover 30 is formed by a material, such as a synthetic resin, having high rigidity and has a fragile part which is easily broken or deformed by a load from the outer side in a vehicle width direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a side door structure.

  In a general side door structure, a service hole is formed in a door inner panel constituting the side door. In order to prevent unnecessary air and water from entering the passenger compartment from the service hall, a cover (service hole cover) for closing the service hole is attached to the door inner panel.

  As the service hole cover, there are a sheet-like cover made of a lightweight polyethylene film or the like, and a cover hole made of a synthetic resin having rigidity that does not resonate with speaker sound (for example, Patent Document 1 and Patent Document 2).

JP2013-203296A JP 2013-141887 A

  By the way, a side collision is detected by a change in atmospheric pressure inside the side door. Explaining the principle, at the time of a side collision, the door outer panel constituting the side door is pushed into the passenger compartment. Then, the volume inside the side door formed by the door outer panel and the door inner panel (with the service hole cover attached) changes (decreases). A side collision is detected by detecting a pressure change inside the side door in accordance with the volume change.

  Here, when the door outer panel is pushed into the passenger compartment side, if the service hole cover is in the form of a sheet, for example, the service hole cover is deformed to the passenger compartment side, and the rise in pressure inside the side door is mitigated. . Therefore, the service hole cover is required to have a high rigidity such as a synthetic resin in order to prevent shape deformation due to an increase in atmospheric pressure.

  However, if a load is applied to the service hole cover with high rigidity from the outside of the passenger compartment due to a side collision, the load is transmitted as it is to the door inner panel, and the intrusion speed of the entire side door into the vehicle is increased.

  In consideration of the above facts, the present invention improves the side collision detection performance in the side door structure including the side collision detection means for detecting the side collision by detecting the pressure change inside the side door. It aims at providing the side door structure which suppresses that the speed | rate which penetrate | invades into the inside increases.

  The side door structure according to the present invention as defined in claim 1 constitutes the vehicle interior of the side door, and detects a side collision by detecting a change in pressure inside the side door and a door inner panel in which a service hole is formed. Detecting side collision detection means, and formed in a plate shape, attached to the door inner panel to block the service hole, and provided with a fragile portion whose rigidity is set lower than other plate-like general portions And a service hole cover.

  In the first aspect of the present invention, it is possible to attach a part such as a key lock to the inside of the side door through the service hole.

  In addition, a service hole cover for closing the service hole is provided, and the service hole cover is formed in a plate shape. For this reason, the deformation of the door outer panel at the time of a side collision is directly reflected in the pressure change inside the side door (the pressure change is not alleviated by the deformation of the service hole cover).

  Furthermore, this service hole cover has a weak part set with low rigidity with respect to the other plate-like general part. For this reason, for example, when an outside handle frame that constitutes a part of the side door and is provided on the outer side in the vehicle width direction of the service hole cover collides (contacts) from the outer side in the vehicle width direction, the fragile portion is broken or deformed. By doing so, collision energy is absorbed.

  A side door structure according to a second aspect of the present invention is the side door structure according to the first aspect of the present invention, wherein the weakened portion is provided at a portion of the outside handle frame facing the front end in the vehicle front-rear direction. .

  In the second aspect of the present invention, in the case of a side collision, the outside handle frame often collides (abuts) on a portion where the fragile portion of the service hole cover is provided.

  In the side door structure according to the present invention described in claim 3, in the present invention described in claim 1 or 2, the weakened portion is formed by a notch.

  In this invention of Claim 3, since the weak part is comprised by the notch, a weak part can be provided easily. Moreover, since the weak part is comprised by the notch, even when the collision object has collided (contact | abutted) with parts other than the weak part in a service hall hole cover, the notch part which is a weak part is easy to fracture | rupture.

  A side door structure according to a fourth aspect of the present invention is the side door structure according to the third aspect of the present invention, wherein the service hole cover is formed integrally with the main body portion for closing the service hole and the main body portion. An attachment portion attached to the inner panel, and the cutout is provided in the attachment portion.

  In the present invention described in claim 4, the notch constituting the fragile portion is provided in the attachment portion, not in the main body portion that functions to close the service hole in the service hole cover.

  As described above, the side door structure according to the first aspect of the present invention enhances the side collision detection performance by detecting a change in air pressure inside the side door, and the entire side door is located inside the vehicle interior during a side collision. It has the outstanding effect that it can suppress entering.

  The side door structure according to the second aspect of the present invention has an excellent effect that the collision energy of the outside handle frame can be absorbed more efficiently.

  The side door structure according to the third aspect of the present invention has an excellent effect that the manufacturing cost is low and the collision energy of the collision object can be stably absorbed.

The side door structure according to the present invention described in claim 4 has an excellent effect that a weak part can be provided in the service hole cover without affecting the original function of the service hole cover.

It is the side view seen from the compartment side which shows the front side door to which the side door structure concerning a 1st embodiment was applied. Corresponding to FIG. 1, (A) is an enlarged view around the mounting portion of the service hole cover, and (B) is a cross-sectional view taken along line BB of (A). It is sectional drawing in the III-III line of FIG. FIG. 4 is a cross-sectional view corresponding to FIG. 3 and showing a state in which the outside handle frame has collided (contacted) with a service hole cover. It is a figure which shows the service hole cover which concerns on 1st Embodiment, (A) is a side view, (B) is sectional drawing in the BB line of (A), (C) is an outside handle frame It is sectional drawing corresponding to (B) which shows the state which has collided. It is a figure which shows the service hole cover which concerns on 2nd Embodiment, (A) is a side view, (B) is sectional drawing in the BB line of (A), (C) is an outside handle frame. It is sectional drawing corresponding to (B) which shows the state which has collided. It is a figure which shows the service hole cover which concerns on 3rd Embodiment, (A) is an enlarged view around the attaching part of a service hole cover, (B) is sectional drawing in the BB line of (A).

[First Embodiment]
Hereinafter, 1st Embodiment of the side door structure which concerns on this invention is described using FIGS. Note that an arrow FR appropriately shown in each figure indicates the front of the vehicle, and an arrow UP indicates the upper side of the vehicle. Furthermore, the arrow IN indicates the inner side in the vehicle width direction (assuming a state in which the front side door 10 is closed).

  As shown in FIG. 1, the front side door 10 to which the side door structure of the first embodiment is applied includes a door outer panel 12 that constitutes the vehicle outer side and a door inner panel 14 that constitutes the vehicle inner side. ing. The door outer panel 12 and the door inner panel 14 are each formed of a steel plate having a substantially rectangular shape in a side view, and the respective outer edges are joined by hemming or the like. A speaker mounting hole 16 and service holes 18 and 20 are formed in the door inner panel 14. The service hole 18 is used when the key lock 22 is attached.

  The front side door 10 includes a service hole cover 30 attached to the door inner panel 14. The service hole cover 30 is a plate-like member made of synthetic resin or the like, and has higher rigidity than the film-like service hole cover. The service hole cover 30 includes a cover main body 32 and a plurality of (five in the present embodiment) attachment portions 34 protruding from the periphery of the cover main body 32. A mounting hole 38 into which the clip 36 is fitted is formed in the mounting portion 34.

  As shown in FIG. 2, the clip 36 is fitted into the mounting hole 38 of the service hole cover 30, and the clip 36 is fitted into the mounting hole 39 formed in the door inner panel 14, thereby A cover 30 is attached to the door inner panel 14. A seal member 40 is disposed on the periphery of the cover body 32 between the cover inner panel 14 and the door inner panel 14. The seal member 40 is disposed over the entire periphery of the cover main body 32. Thus, the service holes 18 and 20 formed in the door inner panel 14 are closed by the service hole cover 30.

  The speaker mounting hole 16 is completely sealed by a speaker (not shown). From the above, the space of the side door interior 42 formed by the door inner panel 14 and the door outer panel 12 is blocked from entering and exiting the gas.

  Further, the front side door 10 includes a side collision detection means 70 that detects a side collision by detecting a change in atmospheric pressure inside the side door 42. When a side collision is detected by the side collision detection means 70, a side airbag, a far side airbag, a curtain airbag, etc. (not shown) are inflated and deployed.

  As shown in FIG. 3, an outside handle frame 44 is disposed outside the front side door 10 in the vehicle width direction. The outside handle frame 44 is attached to the door outer panel 12 and is disposed at a position facing the service hole 18 of the door inner panel 14 in the vehicle width direction.

  As shown in FIGS. 5A and 5B, the cover body 32 of the service hole cover 30 has a notch 46 formed on the vehicle interior side and the vehicle interior outside. Specifically, three notches 46 along the vehicle vertical direction are formed on the vehicle interior side and one on the vehicle exterior side. Further, three notches 46 along the vehicle front-rear direction are formed on the vehicle interior side and one on the vehicle exterior side. Thereby, when a load is applied to the service hole cover 30 from the outside of the passenger compartment, the thin portion 47 as the weakened portion that is thinned by the formation of the notch 46 is easily broken. By being formed in this way, the service hole cover 30 is composed of a plate-shaped general portion 33 and a fragile portion provided by a notch 46 (thin wall portion 47).

  Further, the notch 46 (thin wall portion 47) is provided around the portion of the outside handle frame 44 corresponding to the vehicle width direction inner side of the front end portion in the vehicle front-rear direction.

  Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 4, when a side collision occurs, the door outer panel 12 is deformed to the vehicle interior side immediately after the collision. As the door outer panel 12 is deformed in this manner, the volume inside the side door is reduced and the air pressure inside the side door is increased.

  In particular, in this embodiment, the door inner panel 14 is formed of a steel plate, and the service hole cover 30 is formed of a synthetic resin in a plate shape. In other words, even if the pressure inside the side door rises due to the deformation of the door outer panel 12, the service hole cover 30 is suppressed or prevented from being deformed to the vehicle interior side. For this reason, the deformation of the door outer panel 12 toward the vehicle interior is directly reflected as a decrease in the volume inside the side door. As a result, when a side collision occurs, a side collision can be detected quickly by detecting a change in atmospheric pressure inside the side door.

  Further, as shown in FIG. 4, when a side collision occurs, the outside handle frame 44 may be pushed into the vehicle interior side and may collide (abut) against the service hole cover 30 from the outside of the vehicle interior.

  As shown in FIG. 4, at the time of a side collision, the front handle front end and the vehicle width direction inner end of the outside handle frame 44 often collide (contact) with the service hole cover. In other words, the outside handle frame easily comes into contact with a portion (a portion of the service hole cover) that faces the front end in the vehicle longitudinal direction of the outside handle frame 44 in the vehicle width direction.

  In this case, in the service hole cover in which the weak part is not formed, the service hole cover is not broken, and the load input to the service hole cover due to the collision of the outside handle frame 44 is applied to the door inner panel 14 via the attachment part 34. Is transmitted to.

  On the other hand, the service hole cover 30 of the present embodiment has a fragile portion. For this reason, as shown in FIG. 5C, the load input by the collision of the outside handle frame 44 is transmitted to the door inner panel 14 while breaking the fragile portion. In other words, the collision energy is absorbed by breaking the fragile portion. As a result, it is possible to suppress an increase in the speed at which the entire side door enters the vehicle interior side during a side collision.

  In the present embodiment, the notch 46 is provided at a portion corresponding to the vehicle width direction inner side of the front end portion in the vehicle front-rear direction of the outside handle frame 44. In other words, the fragile portion is provided in a portion where the outside handle frame 44 is likely to come into contact. For this reason, when the outside handle frame 44 collides with the service hole cover 30, a load is directly input to the fragile portion, so that the fragile portion is easily broken.

  However, the fragile portion may be provided in another portion of the cover main body 32 without being provided in a portion where the outside handle frame 44 is likely to come into contact. In particular, in this embodiment, since the fragile portion is constituted by the notch 46, the fragile portion is broken even if the portion where the outside handle frame abuts and the portion where the notch 46 is formed (fragile portion) are misaligned. It's easy to do.

  Moreover, in this embodiment, since the weak part is formed by notching the surface of the service hole cover 30, a weak part can be provided easily.

[Second Embodiment]
Hereinafter, 2nd Embodiment of the side door structure which concerns on this invention is described using FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 6A and 6B, the second embodiment is characterized in that the fragile portion is not formed by the notch but is formed by the extra length portion 52. . Specifically, the surplus portion 52 is formed by making the service hole cover 50 slightly thin and wavy, and is formed so as to draw a substantially circular shape in a side view.

  The extra length portion 52 is formed so as to surround the above-described “portion where the outside handle frame 44 is easily abutted”.

(Action / Effect)
The service hole cover 50 according to the present embodiment is a plate-like member as a whole, although the extra length portion 52 is formed to be slightly thin. Therefore, the same side collision detection performance as that of the first embodiment can be exhibited. .

  Further, as shown in FIG. 6C, the load input by the collision of the outside handle frame 44 extends the surplus length portion 52 toward the vehicle interior side, and the portion surrounded by the surplus length portion 52 is the vehicle interior. Displace inside. In other words, the collision energy is absorbed by this deformation. As a result, it is possible to suppress an increase in the speed at which the entire side door enters the vehicle interior side during a side collision.

[Third Embodiment]
Hereinafter, a third embodiment of the side door structure according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 7A and 7B, the third embodiment is characterized in that the weakened portion is not provided in the cover main body 62 but is provided in the attachment portion 64. . Specifically, a notch 66 is formed along the edge of the attachment portion 64 on the cover main body 62 side. In addition, the notch 66 is formed outside the passenger compartment of the service hole cover 60.

(Action / Effect)
Also in the third embodiment, since the service hole cover 60 is a plate-like member as a whole, the side collision detection performance similar to that of the first embodiment can be exhibited.

  Further, when the outside handle frame 44 collides with the service hole cover 60, the input load is transmitted to the door inner panel 14 through the mounting portion 64, so that the notch 66 is formed to reduce the thickness. The attachment portion 64 is broken with the thinned portion 67 as a starting point. In other words, the collision energy is absorbed by the breaking of the mounting portion 64. As a result, it is possible to suppress an increase in the speed at which the entire side door enters the vehicle interior side during a side collision.

  Also in this third embodiment, since the fragile portion is formed by the notch 66, the fragile portion is easily broken even if the outside handle frame 44 collides with any portion of the service hole cover 30.

  Furthermore, in this embodiment, the notch constituting the fragile portion is provided in the mounting portion, not the main body portion that performs the function of closing the service hole in the service hole cover. A vulnerable part can be provided in the service hole cover without affecting the service hole cover.

[Supplementary explanation of the above embodiment]
In each of the above-described embodiments, the fragile portion is configured by the notch 46 of the cover main body 32, the extra length portion 52 of the cover main body 32, and the notch 66 of the attachment portion 34. Alternatively, the notch 46 of the cover main body 32 and the notch 66 of the attachment part 34 may be provided at the same time to constitute the weak part.

  Moreover, in each embodiment mentioned above, although the weak part was comprised by the notches 46 and 66 and the surplus length part 52, this invention is not limited to this. Any configuration that easily breaks or deforms when a load is applied to the service hole cover from the outside of the passenger compartment and transmitted to the door inner panel is included in the “fragile portion” of the present invention.

  Moreover, although each embodiment mentioned above demonstrated what attached the service hole cover with respect to a door inner panel by the clip, this invention is not restricted to this, A various attachment aspect can be employ | adopted.

  Moreover, in each embodiment mentioned above, although the side door structure concerning this invention was applied to the front side door, the application object of this invention is not restricted to this, You may apply to a rear side door.

10 Front side door (side door)
14 Door inner panel 18 Service hole 30 Service hole cover 32 Main body part 34 Mounting part 42 Inside side door 44 Outside handle frame 46 Notch 47 Thin part (fragile part)
50 Service hole cover 52 Extra length (fragile)
60 Service hole cover 66 Notch 67 Thin part (fragile part)
70 Side collision detection means

Claims (4)

A door inner panel in which the service hole is formed and the vehicle interior of the side door,
A side collision detection means for detecting a side collision by detecting a change in air pressure inside the side door;
A service hole cover that is formed in a plate shape, is attached to the door inner panel and closes the service hole, and is provided with a weakened portion set to be low in rigidity relative to other plate-like general portions;
Side door structure with The fragile portion is provided in a portion facing the front end in the vehicle front-rear direction of the outside handle frame in the vehicle width direction,
The side door structure according to claim 1. The fragile part is constituted by a notch,
The side door structure according to claim 1 or claim 2. The service hole cover includes a main body portion that closes the service hole, and an attachment portion that is integrally formed with the main body portion and is attached to the door inner panel.
The notch is provided in the attachment portion,
The side door structure according to claim 3.

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