JP2011156945A - Joint structure of air-conditioning duct for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of an air-conditioning duct for a vehicle, which allows easy assembling of the air-conditioning duct to an instrument panel while reducing costs. <P>SOLUTION: This joint structure 10 includes a joined part 40 formed in the instrument panel 12 and a plurality of projecting parts 38 swollen toward the joined part 40 from an upper wall part 36 formed in the air-conditioning duct 24 provided on a vehicle lower side in relation to the instrument panel 12 and joined by adhesive in pressed and deformed states on the back face 40A of the joined part 40. By this constitution, the plurality of projecting parts 38 are designed to interfere with the joined part 40, and thereby dimensional dispersion can be absorbed since the plurality of projecting parts 38 are pressed and formed, even if the dimensional dispersion is generated in mutually opposite directions in the joined part 40 and the upper wall part 36. The plurality of projecting parts 38 are joined to the back face 40A of the joined part 40 by the adhesive, attaining cost reduction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a joining structure for an air conditioning duct for a vehicle.

  Patent Document 1 discloses a duct member welding method for an instrument panel in which a duct member is vibration welded to the back surface of the instrument panel.

JP 2007-245881 A JP 2004-90697 A JP 2007-38710 A JP 2004-161041 A JP 2009-262814 A

  However, in general, instrument panels and air-conditioning ducts have large component sizes, so that the dimensions are likely to vary during manufacturing. For this reason, for example, even if the air conditioning duct is positioned with respect to the instrument panel, a situation may occur in which the joined portion of the air conditioning duct does not reach the joined portion of the instrument panel. Therefore, in this case, there is a possibility that the air conditioning duct is difficult to assemble to the instrument panel or cannot be assembled.

  Moreover, in the vibration welding method as described in Patent Document 1, vibration welding is performed after the duct member is set on a jig or an instrument panel, which requires man-hours and increases costs.

  The present invention has been made in view of the above problems, and even when the instrument panel and the air conditioning duct have dimensional variations, the air conditioning duct can be easily assembled to the instrument panel, and the cost can be reduced. An object of the present invention is to provide a vehicular air-conditioning duct joint structure that can be used.

  In order to solve the above-mentioned problem, a vehicular air-conditioning duct joining structure according to claim 1 includes a joined portion formed on an instrument panel provided in a front part of a passenger compartment, and a vehicle up-down direction relative to the instrument panel. A plurality of air-conditioning ducts provided on the lower side in the direction of the air-conditioning duct that bulges toward the bonded portion from the portion facing the bonded portion and is bonded to the back surface of the bonded portion with an adhesive in a pressed state. And a convex portion.

  According to the joining structure of the vehicle air conditioning duct, the plurality of convex portions are so-called interference design with respect to the joined portion, and are joined in a state of being pressed and deformed to the back surface of the joined portion. Yes. Therefore, when joining a plurality of convex portions to the back surface of the joined portion, even if there is a variation in dimensions in the instrument panel or the air conditioning duct (particularly, a variation in the facing direction between the joined portion and the facing portion), This variation in dimensions can be absorbed by pressing and deforming the plurality of convex portions. Thereby, an air-conditioning duct can be easily assembled | attached to an instrument panel.

  In addition, since the plurality of convex portions are joined to the back surface of the joined portion by an adhesive, the number of steps for assembling the air conditioning duct to the instrument panel can be reduced, thereby reducing the cost.

  The vehicle air-conditioning duct joining structure according to claim 2 is the vehicle air-conditioning duct joining structure according to claim 1, wherein the plurality of convex portions are formed to be softer than the joined portion. Has been.

  According to this vehicular air-conditioning duct joining structure, the plurality of convex portions are formed to be softer than the joined portions. Therefore, when joining the plurality of convex portions in a state of being pressed and deformed to the joined portions. The plurality of convex portions can be easily pressed and deformed.

  The vehicular air-conditioning duct joint structure according to claim 3 is the vehicular air-conditioning duct joint structure according to claim 1 or 2, wherein the plurality of convex portions are parallel to each other. And the second group of convex portions are arranged so that there is no linear broken line.

  According to the joining structure of the vehicle air conditioning duct, since there is no linear broken line between the first group of convex portions and the second group of convex portions that are parallel to each other, the folding of the air conditioning duct is suppressed, The rigidity of the air conditioning duct can be ensured.

  The joining structure of the vehicle air-conditioning duct according to claim 4 is the joining structure of the vehicle air-conditioning duct according to any one of claims 1 to 3, wherein the joining portion is arranged from the back surface of the joined portion to the facing portion. It further includes an abutment rib that protrudes toward and abuts against the facing portion.

  According to the vehicular air-conditioning duct joining structure, the amount of pressing deformation of the plurality of convex portions can be managed by the abutting rib being brought into contact with the facing portion.

  The vehicular air-conditioning duct joining structure according to claim 5 is the vehicular air-conditioning duct joining structure according to any one of claims 1 to 4, wherein the vehicular air-conditioning duct joining structure extends from the back surface of the joined portion to the facing portion. It further includes a bonding rib that protrudes toward the side and is bonded to the side wall of at least one of the plurality of protrusions by an adhesive.

  According to the joining structure of the vehicle air-conditioning duct, at least one of the plurality of convex portions is joined to the joining rib in addition to the back surface of the joined portion. As a result, the bonding area between the convex portion and the bonded portion is increased, so that the bonding strength between the convex portion and the bonded portion, and thus the assembly strength between the air conditioning duct and the instrument panel can be improved. it can.

  As described above in detail, according to the present invention, the air conditioning duct can be easily assembled to the instrument panel and the cost can be reduced even when the instrument panel and the air conditioning duct have dimensional variations.

It is a disassembled perspective view which shows the state before the assembly | attachment of the instrument panel and the air conditioning duct to which the joining structure of the vehicle air conditioning duct which concerns on one Embodiment of this invention was applied. It is a principal part expansion perspective view which shows the some convex part formed in the side air conditioning duct shown by FIG. 1, and its peripheral part. FIG. 3 is an enlarged sectional view taken along line F3-F3 of FIG. It is a figure corresponding to FIG. 3 which shows the state by which the some convex part shown by FIG. 3 was joined to the back surface of the to-be-joined part. It is a principal part expansion perspective view which shows the attachment seat shown by FIG. It is a principal part expansion perspective view which shows the modification of the some convex part shown by FIG. It is a principal part expanded side surface sectional view which shows the state by which the some convex part shown by FIG. 6 was joined to the back surface of the to-be-joined part. It is a principal part expansion perspective view which shows the modification of the side air conditioning duct shown by FIG. FIG. 9 is an enlarged sectional view taken along line F9-F9 in FIG. It is a figure corresponding to FIG. 9 which shows the modification of the some convex part shown by FIG. It is a principal part expansion perspective view which shows the modification of the center air conditioning duct shown by FIG. It is F12-F12 line expanded sectional view of FIG. It is a figure corresponding to FIG. 4 which shows the modification of the joining structure of the air conditioning duct for vehicles shown by FIG. It is a figure corresponding to FIG. 4 which shows the other modification of the joining structure of the air conditioning duct for vehicles shown by FIG.

  An embodiment of the present invention will be described below with reference to the drawings.

  In each figure, an arrow UP, an arrow FR, and an arrow OUT indicate the vehicle vertical direction upper side, the vehicle longitudinal direction front side, and the vehicle width direction outer side (right side).

  The instrument panel 12 shown in FIG. 1 is provided in the front part of the passenger compartment. The instrument panel 12 is attached to an instrument panel reinforcement spanned between left and right front pillars (not shown), and covers the air conditioner 14 and the like from the upper side of the vehicle.

  A center air conditioning outlet 16 and a center defroster outlet 18 are formed at the center of the instrument panel 12, and a side air conditioning outlet 20 and a side defroster outlet 22 are formed outside the vehicle width direction. Has been.

  On the other hand, the air conditioning duct 24 is provided between the instrument panel 12 and the air conditioner 14 in the vehicle vertical direction, and includes a center air conditioning duct 26, a center defroster duct 28, a side air conditioning duct 30, and a side defroster duct 32. Configured.

  The center air-conditioning duct 26 and the center defroster duct 28 communicate the outlet 34 formed in the air conditioner 14 with the center air-conditioning outlet 16 and the center defroster outlet 18, and the side air-conditioning duct 30 and the side defroster duct 32 are The above-described outlet 34, the side air conditioning outlet 20, and the side defroster outlet 22 are communicated with each other.

  The instrument panel 12 and the air conditioning duct 24 are both made of resin. In the present embodiment, as an example, the instrument panel 12 is formed by injection molding, and the air conditioning duct 24 is formed by blow molding. ing.

  The vehicle panel air-conditioning duct joint structure 10 according to an embodiment of the present invention is applied to the instrument panel 12 and the air-conditioning duct 24, and the air-conditioning duct 24 is connected to the vehicle air-conditioning duct joint structure 10. Is integrally assembled with the instrument panel 12.

  That is, as shown in FIGS. 1 and 2, a plurality of convex portions 38 are formed on the upper wall portion 36 as an opposing portion formed on the straight portion 30 </ b> A of the side air conditioning duct 30. The plurality of convex portions 38 are formed in ridges extending along the longitudinal direction (vehicle width direction) of the linear portion 30A, and are formed in parallel to each other.

  On the other hand, as shown in FIG. 3, the instrument panel 12 is formed with a joined portion 40 that opposes the upper wall portion 36, and each of the above-described convex portions 38 extends from the upper wall portion 36 to the joined portion. It is formed in a bead shape having a trapezoidal cross section that bulges toward 40.

  Furthermore, each convex part 38 in the state before being joined to the joined part 40 is more than the gap L <b> 2 between the upper wall part 36 and the joined part 40 in the state where the air conditioning duct 24 is assembled to the instrument panel 12. The height L1 is also set high (L1> L2). That is, each convex portion 38 has a so-called interference design with respect to the instrument panel 12.

  The plurality of convex portions 38 are stretched when formed by blow molding, and are formed to be thinner (softer) than other general portions and the above-described bonded portion 40.

  Then, as shown in FIG. 4, each convex portion 38 is pressed and deformed in the height direction on the back surface 40 </ b> A of the bonded portion 40 (the thin side wall 38 </ b> A is buckled) by an adhesive. It is joined.

  Further, the side defroster duct 32 shown in FIG. 1 is formed with a mounting seat 46 as an opposing portion extending outward in the vehicle width direction. As shown in FIG. In addition, a plurality of convex portions 48 are formed.

  The plurality of convex portions 48 are also configured in the same manner as the plurality of convex portions 38 described above, and are pressed against the back surface of the joined portion (not shown) formed on the instrument panel 12 so as to face the mounting seat 46. It is joined by an adhesive in a deformed state.

  In addition, the hole 52 into which the positioning protrusion 50 (refer FIG. 5) formed in the above-mentioned instrument panel 12 (refer FIG. 1) is inserted in the above-mentioned attachment seat 46 and the other site | part of the air-conditioning duct 24. FIG. Is formed. And the air-conditioning duct 24 shown by FIG. 1 is positioned with respect to the instrument panel 12 by inserting the positioning protrusion 50 in this hole part 52. FIG.

  With the above structure, the air conditioning duct 24 is integrally assembled to the instrument panel 12.

  Next, the operation and effect of one embodiment of the present invention will be described.

  As shown in FIG. 4, according to the vehicular air-conditioning duct joining structure 10, the plurality of convex portions 38 have a so-called interference design with respect to the joined portion 40. It is joined to the back surface 40A in a state of being pressed and deformed.

  Accordingly, when the plurality of convex portions 38 are joined to the back surface 40A of the joined portion 40, the instrument panel 12 and the air conditioning duct 24 have different dimensions (particularly, in the opposing direction of the joined portion 40 and the upper wall portion 36). Even if a variation occurs, the variation of this dimension can be absorbed by the plurality of convex portions 38 being pressed and deformed. Thereby, the air-conditioning duct 24 can be easily assembled to the instrument panel 12.

  Further, the plurality of convex portions 38 are formed to be thinner (softer) than the joined portion 40 by being stretched when formed by blow molding. Therefore, when the plurality of convex portions 38 are joined to the joined portion 40 in a state of being pressed and deformed, the plurality of convex portions 38 can be easily deformed by pressure.

  In addition, since the plurality of convex portions 38 are joined to the back surface 40A of the joined portion 40 by an adhesive, the number of steps for assembling the air conditioning duct 24 to the instrument panel 12 can be reduced, thereby reducing the cost. be able to.

  By the way, as mentioned above, when the air conditioning duct 24 is formed by blow molding so as to be thinner than the instrument panel 12 as a whole, the rigidity of the air conditioning duct 24 may be insufficient.

  However, according to the vehicular air-conditioning duct joining structure 10, the upper wall portion 36 is formed with a plurality of bead-shaped convex portions 38. Rigidity can be ensured.

  Further, since the plurality of convex portions 38 are formed in the side air conditioning duct 30, the rigidity of the side air conditioning duct 30 can be ensured without adding a new member, and thus the weight of the air conditioning duct 24 is reduced. You can also.

  Furthermore, since the side wall 38A of each convex portion 38 disposed between the upper wall portion 36 and the joined portion 40 serves as a beam, the rigidity of the instrument panel 12 can be improved.

  In particular, when the plurality of convex portions 38 are adhered to the back surface of the instrument panel 12 over a wide range, the rigidity of the instrument panel 12 can be further improved.

  Next, a modification of one embodiment of the present invention will be described.

  In the above embodiment, as shown in FIG. 2, the plurality of convex portions 38 are each formed on a protrusion and formed in parallel with each other, but may be configured as follows.

  That is, in the modification shown in FIG. 6, each of the plurality of convex portions 38 is formed in a regular hexagonal shape in plan view, and the base end side (the vehicle vertical direction lower side) of the plurality of convex portions 38 is formed. The upper wall portions 36 to be connected are arranged so as to form a honeycomb shape as a whole.

  In other words, the plurality of protrusions 38 includes a first group of protrusions 38 (for example, a plurality of protrusions 38 arranged in the vertical direction surrounded by the square A) and a second group of protrusions 38. (For example, a plurality of convex portions 38 arranged in the vertical direction surrounded by a square B) are arranged so that no linear broken line exists.

  That is, when a boundary line L is set between the first group of convex portions 38 and the second group of convex portions 38, one of the convex portions 38 belonging to the first group is placed on the boundary line L. A part of each convex part 38 which belongs to a part and a 2nd group is located.

  In this case, the first group of convex portions 38 and the second group of convex portions 38 that are parallel to each other are surrounded by the plurality of convex portions 38 and the square B that are arranged in the vertical direction surrounded by the square A described above. In addition to the plurality of convex portions 38 arranged in the vertical direction, for example, a plurality of convex portions 38 arranged in an oblique direction surrounded by a square C and a plurality of convex portions 38 arranged in an oblique direction surrounded by a square D, and particularly illustrated However, a plurality of protrusions 38 arranged in an oblique direction different from a plurality of protrusions 38 arranged in the horizontal direction and a plurality of protrusions 38 arranged in the horizontal direction in parallel with this, or a plurality of protrusions 38 surrounded by squares C and D. This also applies to the portion 38 and a plurality of convex portions 38 arranged in parallel with the portion 38 in an oblique direction.

  When configured in this manner, since there is no linear broken line between the first group of convex portions 38 and the second group of convex portions 38 that are parallel to each other, the side air conditioning duct 30 is prevented from being folded. Thus, the rigidity of the side air conditioning duct 30 can be ensured.

  Further, in this modified example, as shown in FIG. 7, the closed section 54 between the plurality of convex portions 38 plays a role as a resonance cell, so that a sound absorption effect due to a sound resonance effect can also be exhibited. Thereby, the sound-absorbing material arranged on the back side of the instrument panel 12 can be reduced in size or eliminated.

  As described above, the plurality of convex portions 38 may be arranged so that no linear polygonal line exists between the first group of convex portions 38 and the second group of convex portions 38 that are parallel to each other. In addition to being formed in a regular hexagonal shape in plan view, for example, it may be formed in a circular shape in plan view.

  The plurality of convex portions 48 formed on the mounting seat 46 shown in FIG. 1 may also be formed in the same manner as the plurality of convex portions 38 shown in FIGS.

  Moreover, although the some convex part 38 was formed along the linear part 30A of the side air conditioning duct 30, as FIG. 1 shows, as shown in FIG. 8, the corner part 30B of the side air conditioning duct 30 is formed. It may be formed across.

  Further, the plurality of convex portions 38 may each be formed in a triangular cross section as shown in FIG. 9, or may be formed in a quadrangular cross section as shown in FIG.

  Further, in this air conditioning duct 24, as shown in FIG. 1, a plurality of convex portions 38 are formed in the side air conditioning duct 30, but, for example, as shown in FIG. A plurality of convex portions 58 similar to the convex portion 38 may be formed, and the plurality of convex portions 58 may be bonded to the bonded portion 60 (see FIG. 12) with an adhesive in a state where the plurality of convex portions 58 are pressed and deformed.

  Further, in this case, the plurality of convex portions 58 are configured in the same manner as the modification example shown in FIGS. 6 and 7 described above, that is, each of the plurality of convex portions 58 is formed in a regular hexagonal shape in plan view. The upper wall portions 56 that connect the base end sides of the convex portions 58 may be arranged so as to form a honeycomb shape as a whole.

  In addition, as shown in FIG. 4, the plurality of convex portions 38 are directly joined to the back surface 40 </ b> A of the joined portion 40, but when the joined portion 40 forms a design surface, for example, Further, it may be bonded to the back surface 40A of the bonded portion 40 via a heat insulating material (not shown) for preventing condensation.

  In addition, the vehicular air conditioning duct joining structure 10 may be configured as follows.

  That is, in the modification shown in FIG. 13, the contact rib 62 protrudes from the back surface 40 </ b> A of the bonded portion 40 toward the upper wall portion 36. The abutment rib 62 is set to have a protruding length L3 shorter than the height L1 of each convex portion 38 in a state before being joined to the joined portion 40 (L1> L3), and the air conditioning duct 24 is In the state assembled to the instrument panel 12, it is in contact with the upper wall portion 36.

  With such a configuration, the amount of pressing deformation of the plurality of convex portions 38 can be managed by the contact rib 62 being in contact with the upper wall portion 36.

  In the modification shown in FIG. 14, a joining rib 64 protrudes from the back surface 40 </ b> A of the joined part 40 toward the upper wall part 36, and the joining rib 64 is connected to the side wall 38 </ b> A of the plurality of convex parts 38. Bonded with adhesive. Since the plurality of convex portions 38 are formed thin as a whole, the bonding ribs are deformed in the lateral direction (the direction indicated by the arrow X and parallel to the upper wall portion 36). 64 is joined.

  With such a configuration, the bonding area between the plurality of convex portions 38 and the bonded portion 40 is increased, so that the bonding strength between the plurality of convex portions 38 and the bonded portion 40, and consequently the air conditioning duct 24. Assembling strength between the instrument panel 12 and the instrument panel 12 can be improved.

  The joining rib 64 may be joined to all of the plurality of convex portions 38, or may be joined to only one of the plurality of convex portions 38.

  Further, the joining rib 64 may have a role as a contact rib that manages the amount of pressing deformation of the plurality of convex portions 38 by being in contact with the upper wall portion 36.

  In addition, the modification which can be combined among the said several modification can be implemented combining suitably.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 Joint structure of vehicle air-conditioning duct 12 Instrument panel 24 Air-conditioning ducts 36 and 56 Upper wall part (opposite part)
38, 48, 58 Convex 40, 60 Joined part 46 Mounting seat (opposite part)
62 Abutment rib 64 Joining rib

Claims (5)

A joined portion formed on an instrument panel provided in the front part of the passenger compartment;
In a state where the air-conditioning duct provided on the lower side in the vehicle vertical direction with respect to the instrument panel bulges from the facing part to the joined part toward the joined part and is pressed and deformed to the back surface of the joined part. A plurality of convex portions joined by an adhesive;
A vehicular air-conditioning duct joining structure. The plurality of convex portions are formed to be softer than the bonded portions.
The joining structure of the air conditioning duct for vehicles according to claim 1. The plurality of protrusions are arranged so that there is no linear polygonal line between the first group of protrusions and the second group of protrusions parallel to each other,
The joining structure of the air-conditioning duct for vehicles of Claim 1 or Claim 2. Protruding toward the facing portion from the back surface of the bonded portion, and provided with a contact rib that is in contact with the facing portion,
The joint structure of the air conditioning duct for vehicles as described in any one of Claims 1-3. A rib that protrudes from the back surface of the bonded portion toward the facing portion and is bonded to the side wall of at least one of the plurality of protruding portions by an adhesive;
The joint structure of the air conditioning duct for vehicles as described in any one of Claims 1-4.

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