JP2006273096A - Interior part with airbag door part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive interior part with an airbag door part of which the airbag door part does not sink into the inside by an outer force exerted on the interior part by applying improvement on a support structure at the free end of a flap part. <P>SOLUTION: A support piece 28 is provided which is integrally connected to a flange part 26 of a frame body 22 with a thin-walled hinge 27. Then the end of the flap 20 opposite to the free end part 20b of the hinge is supported by the support piece 28 from below with the thin-walled hinge 27 folded back. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an interior product with an airbag door portion having an airbag door portion that is deployed by the operation of an airbag device in the event of a vehicle collision.

  Conventionally, an interior door body in which an airbag door portion that is deployed by the operation of an airbag device is defined by a portion to be broken, and a flange that is located on the back side of the interior body body and is welded to the outer periphery of the airbag door portion And a frame body part in which the airbag apparatus is accommodated, and a flap part in which the frame body part and one side are integrally connected by a hinge part, and an upper surface is welded to the back surface of the airbag door part. The interior goods with an airbag door part are known (for example, refer to patent documents 1).

In this interior product with an airbag door part, the tip of the flap part is molded so as to be positioned above the flange part of the frame body part, and after the molding, the flap part is pressed from the front side of the interior product body by the interior product body. The front end portion of the frame body is rotated around the hinge portion so as to come into contact with the upper surface of the flange portion of the frame body portion, and is joined to the interior body by vibration welding.
JP 2004-106823 A

  However, in the interior product with an airbag door part of Patent Document 1 described above, the flap part is pressed and joined to the interior product body by vibration welding, so the front end part of the flap part and the flange of the frame part In order to increase the lap allowance with the upper surface of the part, the tip of the flap part must be separated largely upward from the flange part of the frame part. If it does so, the movement amount of the flap part at the time of welding will become large, and it will be necessary to perform vibration welding in the state in which the hinge part was stressed. Therefore, there has been a problem that it is not possible to make a large lapping allowance between the front end portion of the flap portion and the upper surface of the flange portion of the frame portion.

  In addition, since vibration welding is performed while pressing the flap portion toward the flange portion side so as not to cause a gap, it is particularly troublesome to weld while sufficiently pressing the base end side (hinge portion side). was there.

  The present invention has been made in view of such a point, and the object of the present invention is to devise the support structure of the free end of the flap portion so that the airbag door portion is brought into the inside by an external force acting on the interior product. The object is to provide an inexpensive interior product with an airbag door that does not get depressed.

  In order to achieve the above object, in the present invention, a support piece integrally connected by a thin hinge is provided on the flange portion of the frame body portion, and the free end side of the flap portion is supported from below by this support piece. did.

  Specifically, in the invention of claim 1, an interior part body in which an airbag door part that is deployed by the operation of the airbag device is defined by a part to be broken, and the airbag door part on the back surface of the interior part body A frame body portion having a flange portion welded to the outer periphery of the air bag, a frame body portion in which the airbag device is accommodated, the frame body portion and the free end side are separated and a base end side is integrally connected by a hinge portion, and the upper surface is the airbag The interior part with an airbag door part provided with the flap part welded to the back surface of the door part is made into object.

  And the flange part of the said frame part is provided with the support piece integrally connected by the thin hinge, and the support piece supports the free end side of the said flap part from the downward direction in the state which turned down the thin hinge And

  In the invention of claim 2, the support piece is integrally connected to the inner end portion of the flange portion on the free end side of the flap portion by a thin hinge.

  According to a third aspect of the present invention, the support piece is integrally connected to the outer end of the flange portion on the free end side of the flap portion by a thin hinge, and the front end of the support piece is folded back when the thin hinge is folded back. It is comprised so that it may be located in a part.

  In the invention of the interior product with an airbag door part of the first aspect, a support piece integrally connected to the flange part of the frame part by a thin-walled hinge is provided, and the flap part is folded in a state where the support piece is folded back. The free end side is supported from below, and the airbag door portion is prevented from falling inward by an external force acting on the interior product from above. For this reason, when the flap part is welded to the back surface of the airbag door part, the flange part and the flap part can be vibrated and welded to the interior product body while pressing the flange part and the flap part substantially evenly. Can be welded. In addition, since the flap portion is supported by a support piece integrally provided on the flange portion via a thin hinge, there is no need to provide a separate support member, so the flap portion free end can be framed without increasing the number of components. It can be supported by the body part. Therefore, an inexpensive interior product with an airbag door portion in which the airbag door portion does not fall inward due to an external force acting on the interior product can be obtained.

  In the second aspect of the invention, the support piece is integrally connected to the inner end portion of the flange portion on the free end side of the flap portion by a thin hinge, so that the flap portion free end is supported by the frame body portion only by folding the support piece. can do. Therefore, an inexpensive interior product with an airbag door portion is obtained in which the airbag door portion does not fall inward due to an external force acting on the interior product with an extremely simple configuration.

  In the invention of claim 3, the support piece is folded back by a thin hinge provided at the flange portion outer end on the free end side of the flap portion, the tip thereof is positioned at the flange portion inner end portion, and the flap portion free end is the frame body. Support in the department. For this reason, since the support piece can be molded outside the flange portion during molding, the design freedom is high, and the flap portion free end is securely attached to the frame body by taking a large wrap allowance with the flap portion free end. It can be supported by the part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 partially shows a panel body 1 (interior part body) of an instrument panel (interior part with an airbag door) A arranged in the front part of a vehicle compartment. The panel body 1 includes an airbag door 5 having a rectangular door portion 17 (airbag door portion) at a portion corresponding to the front of the passenger seat next to the driver's seat. The door portion 17 is defined by a planned breaking portion 7 that is broken when the airbag (not shown) of the airbag device 42 shown in FIG. 2 is deployed. The door portion 17 is a so-called seamless type in which the planned fracture portion 7 cannot be identified from the front side of the panel body 1. The airbag device 42 protects the passenger in the passenger seat against an impact from the longitudinal direction of the vehicle body.

  As shown in FIG. 2, the panel body 1 is made of a resin base material 10 formed by injection molding polypropylene / filler hard resin (PPF) or the like.

  On the back surface of the substrate 10, for example, a groove portion 15 having a substantially V-shaped cross section that is recessed toward the front surface side is formed so as to form each rectangular side of the door portion 17. That is, the panel body 1 has a portion where the groove portion 15 is provided as a thinner fragile portion than the other portions, and the thin fragile portion serves as the planned fracture portion 7. The planned break portion 7 forms an outer edge of a rectangular door portion 17 that opens toward the rear side of the vehicle.

  A resin molded body 13 is disposed on the back side of the panel main body 1. In the present embodiment, the airbag door 5 is a combination of a part of the panel body 1 (the door portion 17 opened by the deployment of the airbag and the peripheral portion of the door portion 17) and the resin molded body 13. pointing.

  The resin molded body 13 extends along the door portion 17, a reinforcing flap portion 20 integrally coupled to the back surface of the door portion 17, and a frame body portion in which the airbag device 42 is disposed on the inside. 22 and a hinge part 24 that connects the flap part 20 and the frame part 22 to each other. The flap portion 20, the frame portion 22 and the hinge portion 24 are integrally formed by injection molding using a molten resin made of a polyolefin-based soft resin (TPO) or the like.

  The frame body portion 22 corresponds to the door portion 17 and extends in a direction away from the panel body 1, and the back surface of the base material 10 from the opening end of the frame body 23 on the panel body 1 side. And a flange portion 26 that spreads outside the door portion 17. The frame body 23 is formed in a cylindrical shape having a rectangular cross section. A plurality of elongated holes 32 penetrating in the plate thickness direction are formed in an intermediate portion of the hinge side portion 23a integrally joined with the hinge portion 24 and an intermediate portion of the anti-hinge side portion 23b facing the hinge side portion 23a. Each is formed.

  The flange portion 26 is disposed outside the door portion 17, that is, outside the planned fracture portion 7, and at least the anti-hinge free end flange portion 26a connected to the anti-hinge side portion 23b of the frame body 23, and the above A proximal end flange portion 26 b connected to the hinge side portion 23 a of the frame body 23, and is welded to the back surface of the base material 10 outside the planned fracture portion 7.

  The anti-hinge free end flange portion 26 a is integrally formed on the outside of the frame body 23, and extends on the extension line of the flap portion 20 along the base material 10 toward the outside of the door portion 17.

  On the other hand, the base end side flange portion 26b is formed integrally with the end portion on the panel main body 1 side of the hinge side portion 23a of the frame main body 23, and extends on the extension line of the flap portion 20 along the base material 10. The hinge free end side flange portion 26a extends to the opposite side.

  As shown in FIG. 3, the flange portion 26 is a side free end flange portion 26 c that extends from the pair of side edges extending in the vehicle body front-rear direction in the frame body 23 to the left and right outer sides along the back surface of the base material 10. The side free end flange portion 26c is integrally formed with the flange portions 26a and 26b on the anti-hinge free end side and the base end side, and is formed in a rectangular frame shape in plan view.

  The flap portion 20 is formed in a plate-like body having a rectangular shape in plan view along the back surface of the base material 10 and having a size substantially corresponding to the shape of the door portion 17. The base end portion 20a on one side of the flap portion 20 is integrally connected to the frame body portion 22 via the hinge portion 24, and the other three sides are free ends separated from the frame body portion 22. An anti-hinge free end 20b and both side free ends 20c are formed.

  As shown in FIG. 2, the hinge portion 24 extends over substantially the entire length of the front side of the rectangular door portion 17, and is formed on the hinge side portion 23 a of the frame body 23 on the side opposite to the proximal end flange portion 26 b. A rotation action portion 24a having a substantially U-shaped cross section that protrudes toward the panel main body 1 side, and protrudes to the opposite side of the panel main body 1 continuously from the rotation action portion 24a. It comprises an extending action portion 24b having a substantially U-shaped cross section to be joined. Thus, the hinge portion 24 integrally connects the base end portion 20a of the flap portion 20 and the end portion on the panel body 1 side of the hinge side portion 23a of the frame body 23.

  The groove portion 15 on the hinge portion 24 side forming the planned fracture portion 7 is provided at a portion corresponding to the connecting portion between the hinge portion 24 and the hinge side portion 23a of the frame body 23 in the base material 10 of the panel body 1. . The configuration of the hinge portion 24 prevents the hinge portion 24 from interfering with an outer portion of the panel body 1 than the door portion 17 when the door portion 17 is opened. On the other hand, the flap portion 15 on the free end side of the flap portion that forms the planned break portion 7 is disposed outside the free end portions 20 b and 20 c of the flap portion 20.

  A plurality of welding projections 40 are provided on the front side surfaces of the flap portion 20 and the flange portion 26 so as to be arranged at predetermined intervals. The flap portion 20 and the flange portion 26 are coupled to the base material 10 by vibration welding the tip of the protrusion 40 to the back surface of the base material 10.

  The airbag device 42 is disposed inside the frame body portion 22. The airbag device 42 includes an airbag case 43 that houses the airbag and an inflator (not shown). A hook-shaped attachment 45 is fixed to the airbag case 43, and the airbag case 43 is engaged with the long hole 32 of the frame body 23 via the attachment 45. The airbag is stored in a folded state in an airbag case 43. The inflator generates gas when a vehicle collision is detected, and the airbag is inflated and deployed by the gas. Yes.

  As a feature of the present invention, a support piece 28 integrally connected by a thin hinge 27 extending in the vehicle width direction is provided on the non-hinge free end flange portion 26a of the flange portion 26 of the frame body portion 22. Yes. That is, the support piece 28 has a bar shape with a substantially right-angled cross section, and is formed on the upper inner end portion of the anti-hinge free end flange portion 26a so as to substantially correspond to the anti-hinge free end portion 20b of the flap portion 20. One acute angle portion of the right-angled triangle in section is integrally connected by a thin-walled hinge 27 that is thinner than the surroundings. In a state where the support piece 28 folds the thin hinge 27, the right angle portion is brought into contact with the non-hinge side portion 23b of the frame main body 23, and the free end side of the flap portion 20 is detachably supported from below. .

  Accordingly, in the instrument panel A, the airbag device 42 is activated by an impact such as a vehicle collision, the airbag is inflated, and the flap portion 20 is pushed up by the pressure, and the planned break portion 7 is broken, The door portion 17 extends forward integrally with the flap portion 20 around the hinge portion 24, and the door portion 17 is normally supported by the anti-hinge free end portion 20b of the flap portion 20 abutting against the support piece 28. It has become so.

-Instrument panel manufacturing method-
Here, a method for manufacturing the instrument panel A will be described. FIG. 4 shows a mold 48 for injection molding the resin molded body 13, and the mold 48 includes a first mold 50 and a second mold 54.

  When the first mold 50 and the second mold 54 are closed, a cavity 55 for molding the resin molded body 13 is formed between the first molding surface 50a and the second molding surface 54a. Of the cavities 55, the first cavity portion 55 a is configured to mold the frame body portion 22, and the second cavity portion 55 b is configured to mold the flap portion 20. A third cavity portion 55c having a substantially triangular cross section is continuously formed in a portion of the first cavity portion 55a corresponding to the anti-hinge free end portion 20b side of the flap portion 20 of the second cavity portion 55b. The third cavity portion 55c forms a support piece 28 that is integrally connected by a thin hinge 27 that extends in the vehicle width direction. The first to third cavities 55a, 55b, and 55c communicate with each other, so that the flap portion 20, the frame body portion 22, the hinge portion 24, and the support piece 28 can be integrally formed.

  In addition, a plurality of concave portions 61 are formed on the first molding surface 50a of the first mold 50 so as to be arranged at predetermined intervals. The recess 61 is for forming the welding protrusion 40 on the flap portion 20 and the flange portion 26.

  After the molten resin is injected into the cavity 55 of such a mold 48 and the molten resin is solidified, the first mold 50 and the second mold 54 are opened, and the resin molded body 13 is demolded. This resin molded body 13 was erected upward from the inner end of the anti-hinge free end side flange portion 26a so that the support piece 28 was connected by the thin-walled hinge 27 and the right-angled portion thereof faced the flap portion 20 side. Molded in a state.

  Subsequently, the support piece 28 is folded down to the flap portion 20 side with the thin hinge 27 folded back, is positioned below the flap portion 20, and is pressed by the base material 10 while being pressed by the base material 10. And the welding protrusion 40 of the front side of the flange part 26 is vibration-welded to the base material 10. Thus, the anti-hinge free end portion 20b of the flap portion 20 and the support piece 28 can be formed in a state in which they are detachably contacted.

-Effect of Embodiment 1-
Therefore, according to the instrument panel A of the present embodiment, the support piece 28 integrally connected to the flange portion 26 of the frame body portion 22 by the thin-walled hinge 27 is provided, and the support piece 28 is in a state where the thin-walled hinge 27 is folded back. The free end side of the flap part 20 is supported from below, and the door part 17 is prevented from falling inward by an external force acting on the panel body 1 from above. For this reason, when the flap part 20 is welded to the back surface of the door part 17, the flange part 26 and the flap part 20 can be vibrated and welded to the panel body 1 while being pressed substantially evenly. Both can be welded. Further, since the flap portion 20 is supported by the support piece 28 provided integrally with the flange portion 26 via the thin hinge 27, it is not necessary to provide a separate support member, so that the flap portion can be increased without increasing the number of components. The 20 free ends can be supported by the frame body portion 22.

  Further, the support piece 28 is integrally connected to the inner end portion of the anti-hinge free end flange portion 26a by the thin hinge 27, so that the free end of the flap portion 20 is supported by the frame body portion 22 simply by folding the support piece 28. be able to. Therefore, an inexpensive instrument panel A is obtained in which the door portion 17 does not fall inward due to an external force acting on the panel body 1 with an extremely simple configuration.

(Embodiment 2)
5 to 7 show a second embodiment of the present invention, which differs from the first embodiment in that the configuration of the support piece is different. In the present embodiment, the same portions as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, in the instrument panel A of the present embodiment, the support piece 128 is integrally connected to the outer end portion of the anti-hinge free end side flange portion 26 a on the opposite side to the hinge portion 24 by the thin-walled hinge 127. The support piece 128 has a window portion 128a formed in a lattice shape at the center, and a hook-shaped locking portion 128b formed at the outer end portion. On the other hand, on the upper surface of the anti-hinge free end flange portion 26a, an accommodation recess 129 is formed in a lattice shape so as to accommodate a portion other than the window portion 128a of the support piece 128.

  With the above configuration, the support piece 128 is folded back toward the flap portion 20 with the thin hinge 127 as a center, and the upper surface of the anti-hinge free end flange portion 26a appears in the window portion 128a so that the inside of the housing recess 129 is formed. It is inserted. In this state, the locking portion 128b of the support piece 128 is in contact with the housing recess 129 located at the inner end of the anti-hinge free end flange portion 26a. And the support piece 128 is supporting the free end side of the flap part 20 so that isolation | separation is possible from the downward direction.

-Manufacturing method for interior parts for vehicles-
As shown in FIG. 7, when the first mold 150 and the second mold 154 of the molding die 148 of the present embodiment are closed, a cavity 155 for molding the resin molded body 113 is formed. Of the cavities 155, the first cavity part 155 a molds the frame body part 22, and the second cavity part 155 b molds the flap part 20. A third cavity portion 155c is formed on the opposite side of the first cavity portion 155a from the second cavity portion 155b. The third cavity portion 155c forms a support piece 128 integrally connected to the anti-hinge free end flange portion 26a by a thin hinge 127 extending in the vehicle width direction.

  After the molten resin is injected into the cavity 155 of such a mold 148 and the molten resin is solidified, the first mold 150 and the second mold 154 are opened, and the resin molded body 113 is demolded. The resin molded body 113 is formed in a state where the support pieces 128 are connected by the thin-walled hinge 127 and are continuously continuous from the outer end of the anti-hinge free end flange portion 26a.

  Subsequently, the flap portion 20 of the resin molded body 13 is pressed while the support piece 128 is pressed by the base material 10 in a state in which the thin hinge 127 is folded back and the locking portion 128b is in contact with the receiving recess 129. And the welding protrusion 40 of the front side of the flange part 26 is vibration-welded to the base material 10. Thus, the instrument panel A can be formed in a state in which the anti-hinge free end portion 20b of the flap portion 20 and the support piece 28 are in contact with each other in a detachable manner.

-Effect of Embodiment 2-
Therefore, according to the instrument panel A of the present invention, the support piece 128 is folded back by the thin-walled hinge 127 provided at the outer end portion of the anti-hinge free end side flange portion 26a of the flap portion 20, and the locking portion 128b is anti-hinge free. The inner end portion of the end flange portion 26 a is positioned below the flap portion 20, and the anti-hinge free end portion 20 b of the flap portion 20 is supported by the frame body portion 22. For this reason, since the support piece 128 can be molded outside the flange portion 26 at the time of molding, the design freedom is high, and the wrap allowance with the anti-hinge free end portion 20b of the flap portion 20 can be ensured. The anti-hinge free end portion 20b of the flap portion 20 can be supported by the frame body portion 22.

(Other embodiments)
The present invention may be configured as follows for each of the above embodiments.

  That is, in each said embodiment, although the panel main body 1 shall consist of the base material 10 of one layer, it is good also as a thing of two or more layers by which the skin material was provided in the surface side of this base material 10. FIG.

  Moreover, in each said embodiment, although the support pieces 28 and 128 were provided in the anti-hinge free end side flange part 26a so that the anti-hinge free end part 20b of the flap part 20 on the opposite side to the hinge part 24 might be supported, The support pieces 28 and 128 may be provided on the side free end flange portion 26c so as to support the side free end portion 20c of the flap portion 20. Furthermore, the airbag device 42 is a front airbag device disposed in front of the passenger seat on the side of the driver's seat, and the airbag device 42 protects the occupant from an impact from the vehicle front-rear direction. It can also be applied to the steering wheel pad to protect the driver. In addition, the present invention can also be applied to the case where an air bag device is installed in a vehicle interior such as a center pillar garnish.

  As described above, the present invention is useful for an interior product with an airbag door portion that has an airbag door portion that is deployed by the operation of an airbag device at the time of a vehicle collision, such as an instrument panel.

It is a perspective view which shows partially the instrument panel main body concerning Embodiment 1 of this invention. It is sectional drawing of the frame part in the II-II line of FIG. It is a top view which shows a part of resin molding. It is sectional drawing which shows a part of shaping | molding die of a resin molding. It is FIG. 2 equivalent view of the frame part concerning Embodiment 2 of this invention. It is FIG. 3 equivalent view of the frame part concerning Embodiment 2 of this invention. It is FIG. 4 equivalent view of the shaping | molding die concerning Embodiment 2 of this invention.

Explanation of symbols

A Instrument panel (interior with airbag door)
1 Panel body (interior product body)
7 Destroying part 17 Door part (airbag door part)
20 Flap part 20b Anti-hinge free end (free end)
DESCRIPTION OF SYMBOLS 22 Frame part 24 Hinge part 26 Flange part 27,127 Thin-walled hinge 28,128 Support piece 42 Airbag apparatus

Claims (3)

An interior part main body in which an airbag door part to be deployed by the operation of the airbag device is partitioned and formed at a part to be broken, and a flange part welded to the outer periphery of the airbag door part on the back surface of the interior part main body, A frame body portion in which the airbag device is accommodated, and a flap portion in which the frame body portion and the free end side are separated, the base end side is integrally connected by a hinge portion, and the upper surface is welded to the back surface of the airbag door portion. It is an interior product with an airbag door part provided,
The flange portion of the frame body portion is provided with a support piece integrally connected with a thin hinge, and the support piece supports the free end side of the flap portion from below with the thin hinge folded back. An interior product with an air bag door. In the interior part with an airbag door part of Claim 1,
The interior piece with an airbag door portion, wherein the support piece is integrally connected to the inner end portion of the flange portion on the free end side of the flap portion by a thin hinge. In the interior part with an airbag door part of Claim 1,
The support piece is integrally connected to the outer end portion of the flange portion on the free end side of the flap portion by a thin-walled hinge, and the tip is positioned at the inner end portion of the flange portion when the thin-walled hinge is folded back. An interior product with an airbag door, characterized by being made.

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