JP2015093616A - Latch periphery structure of resin back door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin back door which secures rigidity and impact strength without depending on a metal component and is advantageous in terms of weight and cost reduction.SOLUTION: A latch storage part of a resin back door has a box shape enclosing a latch with a vertical wall part. A first vertical rib 53 is erected at the latch storage part, and an outer panel 2 includes a second vertical rib 25 which is erected located adjacent to the first vertical rib 53. An edge end of the second vertical rib 25 is fixedly bonded by an adhesive 53b applied along a base part of the first vertical rib 53.

Description

  The present invention relates to a latch peripheral structure of a back door provided in a rear opening of a vehicle body of an automobile, particularly a hatchback type resin back door.

  In recent years, the resinization of the vehicle body has progressed for the purpose of reducing the weight, and various problems in the resinization of the back door provided at the rear opening of the vehicle body of an automobile have been studied. Problems with resinizing the back door are that it is less rigid than sheet metal and weak against impacts, so there is a risk that the panel will break when an impact load is applied from the rear of the vehicle due to a rear impact or the like.

  As a reinforcement and a countermeasure against rear collision, Patent Document 1 discloses that a sheet metal reinforcement is extended from the hinge part to the lower part of the belt line through the window frame part, and the upper hinge part and the lower middle latch part are connected by a wire cable. It is disclosed. However, regardless of the vicinity of the hinge, if the sheet metal reinforcement is extended below the pillar portion or the belt line, the weight increases, and the contribution to weight reduction and cost reduction becomes small.

JP 2010-159037 A

  The present invention has been made in view of such a situation, and an object of the present invention is to latch a resin back door that can ensure rigidity and impact strength without depending on metal parts, and is advantageous for weight reduction and cost reduction. To provide a peripheral structure.

  In order to achieve the above object, the resin back door latch peripheral structure according to the present invention is a resin back door latch peripheral structure provided in an openable and closable manner at the rear opening of the vehicle body, and is provided with a window opening at the top. An outer panel and an inner panel made of a resin molded product are integrally joined at the peripheral edge portion thereof and the peripheral edge portion of the window opening, and the upper end portion that defines the upper edge of the window opening is on the upper edge of the vehicle body rear opening. A latch that is pivotally connected via a hinge and that can be engaged with and disengaged from a striker fixed to a lower side of the rear opening of the vehicle body is accommodated in a latch accommodating portion provided below the window opening of the inner panel. An inner space is formed between the outer panel and the inner panel, and a wire cable for connecting the upper end portion and the main body portion below the window opening is connected to the inner space. In the peripheral structure of the resin back door latch in which the harness is routed, the latch housing portion includes a vertical wall portion standing in the inner space from the inner surface of the inner panel, and the latch housing portion includes the vertical wall portion. A first vertical rib extending from the vertical wall portion toward the lower end of the inner panel is erected, and a reinforcing long fiber is insert-molded in the cross section of the inner panel adjacent to the base portion or the base portion of the first vertical rib. The outer panel includes a second vertical rib standing in the internal space adjacent to the first vertical rib, and an edge of the second vertical rib extends along a base portion of the first vertical rib. It is bonded and fixed by the adhesive applied.

  Moreover, in one aspect of the peripheral structure of the latch of the resin back door according to the present invention, the latch housing portion has a box shape configured to surround the latch by the vertical wall portion.

  Further, in one aspect of the resin back door latch peripheral structure according to the present invention, a pair of ribs are provided so as to extend outward in the vehicle width direction from the vertical wall portion on the outer side in the vehicle width direction of the latch housing portion, A passage for routing the wire cable and / or harness is formed between the pair of ribs, and reinforcing long fibers are insert-molded in a cross section of the inner panel along the passage.

  Further, in one aspect of the latch peripheral structure of the resin back door according to the present invention, a pair of ribs are provided so as to extend outward in the vehicle width direction from the vertical wall portions on both sides in the vehicle width direction of the latch housing portion, A passage for routing the wire cable and / or harness is formed between a pair of ribs, and the passage defines a closed cross section with the outer panel, and the closed cross section Filled with adhesive.

  Further, in one aspect of the resin back door latch peripheral structure according to the present invention, the wire cable and / or the harness are meandered and arranged on opposite side walls of the pair of ribs defining the passage. The meandering ribs to be projected alternately.

  Further, in one aspect of the resin back door latch peripheral structure according to the present invention, the reinforcing long fibers are insert-molded in the cross section of the inner panel along the seal surface contacting the peripheral edge of the rear opening of the vehicle body. Yes.

  Further, in one aspect of the resin back door latch peripheral structure according to the present invention, the reinforcing long fiber includes a long glass fiber or a long carbon fiber, and is bundled or woven with an impregnating resin. It is insert molded as a product.

  According to one aspect of the resin back door latch peripheral structure according to the present invention, the first vertical rib extending from the vertical wall portion of the latch accommodating portion (15) toward the lower end portion of the inner panel. (52, 53) are erected, reinforcing long fibers (53f) are insert-molded in the cross section of the inner panel adjacent to the base of the first longitudinal rib or the base, and the outer panel A second vertical rib (25) erected in the internal space is provided adjacent to the first vertical rib (53), and an edge of the second vertical rib is applied along a base of the first vertical rib. Since the adhesive is fixed by the adhesive (53b), breakage and separation around the latch due to impact load from the back are prevented by the reinforcing long fibers, and the inner panel and the outer panel are bonded and fixed. With that Separation of N'napaneru and outer panel can be suppressed, it is also advantageous in that the load is distributed across the back door.

  In addition, according to the aspect of the present invention, the latch housing portion has a box shape configured to surround the latch by the vertical wall portion, so that the rigidity of the latch housing portion can be increased. .

  Moreover, according to one aspect of the present invention, a pair of ribs (34, 35) are provided so as to extend from the vertical wall portion on the vehicle width direction outer side of the latch housing portion to the vehicle width direction outer side, and the pair of ribs A passage for routing the wire cable and / or harness is formed therebetween, and reinforcing long fibers are insert-molded in the cross section of the inner panel along the passage. A reinforcing structure is formed around the latch to be engaged, which is advantageous in suppressing breakage around the latch due to an impact load from the rear of the vehicle. In addition to or in addition to the configuration of reinforcing long fibers inserted into the passage, the passage defines a closed cross section with the outer panel, and the closed cross section is filled with an adhesive. The same effect can be obtained in the embodiment. Furthermore, in the aspect in which the passage defines a closed section with the outer panel, and the closed section is filled with the adhesive (33b), the wire routed in the path along the pillar portion The cables and / or harnesses are fixed with an adhesive and a reinforcing structure is formed using them as a core, which is advantageous in preventing deformation and breakage of the entire back door while avoiding an increase in weight as described above.

  Moreover, according to one aspect of the present invention, the wire cable and / or the harness (7) are meandered and arranged on the opposing side walls of the pair of ribs (34) defining the passage. Since the meandering ribs (34a) are alternately projected, the wire cable and / or the harness are locked by the meandering ribs before bonding, and the adhesive can be stably applied to improve workability and adherence. Can also be improved.

  Further, according to one aspect of the present invention, the reinforcing long fiber (33f) is insert-molded in the cross section of the inner panel along the seal surface (32) contacting the peripheral edge of the vehicle body rear opening. The strength and rigidity of the peripheral part of the inner panel including the hinge attachment part (upper end part), the left and right pillar parts, and the latch attachment part (lower end part) that are pivotally connected to the vehicle body are improved, and separation from the outer panel is suppressed. This is advantageous.

  Also, according to one aspect of the present invention, the reinforcing long fibers include glass long fibers or carbon long fibers, and are insert-molded as tape-like articles that are bundled or woven with an impregnating resin. The reinforcing long fibers can be inserted in a certain amount, orientation and shape.

It is the figure which looked at the back door which concerns on 1st Embodiment of this invention from the room inner side. It is the figure which looked at the inner panel from the back side. It is the elements on larger scale of FIG. 2 which shows the wiring state of a harness. It is AA sectional drawing of FIG. It is AA sectional drawing of FIG. 1 which concerns on 2nd Embodiment of this invention. It is AA sectional drawing of FIG. 1 which concerns on the modification of 2nd Embodiment of this invention. It is a perspective view which shows the reinforcement structure of a latch attachment part periphery. It is a BB partial sectional view of FIG. FIG. 9 is a schematic CC sectional view of FIG. 8.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1-4 has shown the back door 1 which concerns on 1st Embodiment of this invention. The back door includes an outer panel 2 and an inner panel 3, a latch 6, a latch housing portion 15, and a harness 7. In each figure, the back door 1 is a hatch-back type back door that can be opened / closed at the rear opening of the vehicle body, and has an outer panel 2 and an inner panel both of which are provided with a window opening 10 and made of a thin resin molded product. 3 form a monaca structure (clamshell structure) having a hollow cross section integrally joined at the peripheral edge portions 21 and 31 and the peripheral edge portions 20 and 30 of the window opening 10.

  The back door 1 (inner panel 3) includes an upper end portion 11 that defines the upper side of the window opening 10, pillar portions 12 and 12 that define both left and right sides of the window opening 10, and a main body portion 13 below the vehicle from the window opening 10. It is composed of Attachment portions for the hinges 5 are provided at the left and right positions of the upper end portion 11, and the back door 1 is rotatably connected to the upper side of the rear opening of the vehicle body via the pair of left and right hinges 5.

  In the illustrated example, a metal reinforcing plate 55 is attached to the back side of the attachment portion of the hinge 5 of the inner panel 3, and the inner panel 3 is sandwiched between the reinforcing plate 55 and the hinge 5 and fastened together. However, the reinforcing plate 55 can be omitted. Adjacent to the hinge mounting portion of the upper end portion 11, a hole 110 is provided for pulling out a harness 7 described later from the hollow portion of the back door 1 to the vehicle body side.

  The lower end portion 14 of the inner panel 3 is provided with a mounting portion 41 of the latch 6 that can be engaged with and disengaged from a striker (not shown) fixed to the lower side of the rear opening of the vehicle body, and the main body portion 13 adjacent to the mounting portion 41. The latch housing 15 for housing the latch 6 and its mechanism is integrally formed. The latch housing portion 15 is recessed in a box shape with respect to the surface of the main body portion 13 facing the vehicle interior side, and the upper portion (the mechanism portion side) of the latch 6 is fixed to the inner bottom surface surrounded by the vertical wall 51. Is done. In this example, the latch accommodating portion 15 has a box shape configured to surround the latch 6 from above the vehicle and from both sides in the vehicle width direction by the vertical wall 51. In addition, the lower part 50 of the latch accommodating part 15 has penetrated so that it may mention later. By making the latch housing portion 15 into a box shape by the vertical wall 51, the rigidity of the latch housing portion 15 is enhanced.

  As shown in FIG. 7, the lower portion 50 of the latch housing portion 15 penetrates toward the opening 40 of the lower end portion 14, and is coupled to the lower end portion 14 by left and right first vertical ribs 52 and 52. The first vertical ribs 53, 53 extend in the vertical direction further to the side (vehicle width direction outer side) of the left and right first vertical ribs 52, 52. Further, the latch accommodating portion 15 is expanded to the left side (right side in the vehicle width direction) in FIG. 1 to be a motor accommodating portion 15a of a rear wiper (not shown), and a hole 15b for inserting the pivot shaft of the rear wiper is provided. It has been. Furthermore, the lower end part 14 on the motor housing part 15a side is provided with a holding part 42 that is used when the opened back door 1 is closed. By providing the first vertical ribs 51 to 54, the rigidity around the latch housing 15 is improved.

  A seal surface 32 is formed adjacent to the center side of the peripheral edge 31 of the inner panel 3. The seal surface 32 is a receiving surface that abuts on an opening trim (weather strip) provided at the rear opening of the vehicle body to form a seal when the back door 1 is closed. As shown in FIG. On the other hand, it is formed as a step surface. A back door glass 4 is bonded and fixed to the surface of the outer panel 2.

  On the back side of the main body 13 of the inner panel 3, reinforcing ribs having a honeycomb pattern may be provided so as to protrude entirely. Further, a pair of reinforcing ribs 33 extending along the back surface side of the sealing surface 32 described above are projected from the outer edge (outer side and lower portion in the vehicle width direction) of the main body 13, and a passage 33c is defined between them. It is made. The passage 33c has a reinforcing structure and also serves as a drainage channel for discharging internal moisture.

  Further, the passage 33 c also serves as a passage for arranging the harness 7 for supplying power to the latch 6, the motor of the rear wiper, and the lamp 43 of the lower end portion 14 in the upper end portion 11 and the pillar portion 12.

  As shown in FIGS. 2 and 3, a pair of reinforcing ribs 34 projecting from the vertical wall 51 on the left side of the latch accommodating portion 15 in FIG. ing. A passage 34 c is defined between the pair of reinforcing ribs 34. The harness 7 routed through the passage 34 c is introduced into the passage 33 c at the lower portion of the pillar portion 12, and is pulled out from the hole 110 of the upper end portion 11 to the vehicle body side through the upper portion of the pillar portion 12.

  A pair of reinforcing ribs 35 are also erected on the right side of the latch housing 15. The pair of reinforcing ribs 35 extend obliquely upward in parallel from the vertical wall 51 on the right side outward in the vehicle width direction. A passage 35 c is also formed in the pair of reinforcing ribs 35. A pair of reinforcing ribs 34 and 35 on both the left and right sides extend in the vehicle width direction while being connected to the vertical wall 51. For this reason, the rigidity around the latch accommodating portion 15 is improved.

  In the harness routing section of the passage 34c and the passage 33c, meandering ribs 33a and 34a for alternately routing the harness 7 in a meandering manner are provided as shown in FIGS. Has been. The meandering ribs may be provided on the pair of reinforcing ribs 35 on the right side in FIG.

  Although it does not specifically limit in shaping | molding of the outer panel 2 and the inner panel 3 of the back door 1 comprised as mentioned above, The glass fiber reinforced polypropylene which mix | blended the glass fiber as a reinforced fiber based on a polypropylene resin, Carbon fiber reinforced polypropylene using carbon fibers as reinforcing fibers is used. And the reinforcement structure as described below is added.

(Insert molding of reinforcing long fibers)
As shown in FIGS. 1 and 4, the upper end portion 11 of the back door 1, the pillar portion 12, a passage 33 c (seal surface 32) extending from both sides of the main body portion 13 to the lower end portion 14, and passages 34 c and 35 c Reinforcing long fibers 33f, 34f, and 35f are insert-molded in the cross section of the inner panel 3 along.

  As these reinforcing long fibers 33f, 34f, and 35f, glass long fibers, carbon long fibers, and polyester long fibers are suitable. For example, strands or rovings are impregnated with polypropylene resin and bundled or woven as a narrow woven fabric. What is made into the flat tape shape can be used suitably. Further, it may be preformed into a shape to be inserted. These long fibers are sometimes referred to as “ultra long fibers” in order to distinguish them from short fibers (staple fibers) having a long fiber length.

  In addition, the reinforcing long fibers 33f in the sections on both sides and the lower end 14 below the section in which the reinforcing long fibers 34f and 35f are insert-molded are omitted, or the reinforcing long fibers 34f and 35f are omitted. Thus, only the reinforcing long fibers 33f may be used. In the former case, as shown in FIG. 7 or FIG. 9, the reinforcing long fibers 53f and 53f are provided in the cross section of the inner panel 3 adjacent to the first vertical ribs 53 and 53 on both sides of the accommodating portion 15 of the latch 6. Can be insert-molded.

  In any case, the strength and rigidity are improved by the reinforcing long fibers 33f, 34f, and 35f that are insert-molded in the cross section of the inner panel 3, and breakage when subjected to an impact load, in particular via the hinge 5. The upper part (11, 12) of the back door 1 pivoted to the upper part of the rear opening of the vehicle body and the lower part (13, 14) engaged with the lower part of the rear opening of the vehicle body via the latch 6, and the housing part of the latch 6 Breakage at both side portions of 15 is prevented.

  Moreover, since the reinforcing long fibers 33f, 34f, 35f, 53f are insert-molded in the cross section of the inner panel 3, reinforcing ribs can be provided on the inner surface side of the portion, and the wire / harness described below is used. This is also advantageous when used in combination with the reinforcing structure.

(Filling the adhesive to the closed section)
In the second embodiment shown in FIG. 5, passages 33 c and 34 c in which the harness 7 is routed, that is, a passage 33 c extending to the upper end portion 11 and the pillar portion 12 of the back door 1 (seal surface 32, main body portion 13). And the pair of reinforcing ribs 33, 34 (35) defining the passage 34c (35c) and the reinforcing ribs 23 in the same arrangement on the back surface side of the outer panel 2. In a state where the outer panel 2 and the inner panel 3 are joined, a closed cross section is defined between the reinforcing rib 33 (34, 35) and the reinforcing rib 23, and the closed cross section is included in the closed cross section. The adhesive 33b (foamed adhesive) is filled.

  In this embodiment, a composite reinforcing structure is formed by the reinforcing ribs 23, 33 (34, 35) defining the closed cross section, the harness 7 and the solidified adhesive 33b, and when subjected to an impact load as described above. In particular, the upper part (11, 12) of the back door 1 pivoted to the upper part of the rear opening of the vehicle body via the hinge 5 and the lower part (13, 14) engaged with the lower part of the rear opening of the vehicle body via the latch 6. ) Is prevented from breaking or breaking.

  Further, the inner panel 3 and the outer panel 2 are firmly integrated by the adhesive 33b and the reinforcing ribs 23, 33 (34, 35). In the above embodiment, as shown in FIG. 6, the reinforcing rib 23 on the outer panel 2 side is partially or entirely omitted, and the adhesive 33 d is foamed in the closed cross section of the Monaca-structured back door 1 itself. May be.

  In the second embodiment described above, the passage 33c from both side portions to the lower end portion 14 of the main body portion 13 cannot be filled with an adhesive. This part is secured as a drainage channel for draining moisture in the internal space.

  Therefore, as shown in FIGS. 8 and 9, the second vertical rib 25 is provided on the outer panel 2 adjacent to the first vertical rib 53 of the inner panel 3, and is applied in advance to the base of the first vertical rib 53. The outer panel 2 and the inner panel 3 can be joined at this portion (both side portions of the latch 6) by the adhesive 53b. In the example of FIG. 9, the first vertical rib 53 and the second vertical rib 25 are joined to the inner panel 3 in a state where the first vertical rib 53 and the second vertical rib 25 are arranged with a space therebetween in the vehicle width direction. In addition, you may arrange | position the 1st vertical rib 53 and the 2nd vertical rib 25 so that it may mutually contact.

  In this case, the vertical rib 53 (25) also has a function of preventing the water flowing down through the drainage path (passage 33c) from flowing into the attachment portion 41 side of the latch 6. By comprising in this way, the fracture | rupture and isolation | separation in the periphery of the latch 6 by the impact load from a vehicle rear are prevented by the reinforcing long fiber, and the inner panel 3 and the outer panel 2 are bonded and fixed. It is also advantageous in that the separation between the inner panel 3 and the outer panel 2 is suppressed and the load is distributed over the entire back door.

  In the first embodiment, the reinforcing long fibers 33f are insert-molded in a cross section along the seal surface 32 at the upper end portion 11, the pillar portion 12, both side portions of the main body portion 13, and the lower end portion 14. However, for the purpose of local reinforcement, insert molding may be performed in a section from the left and right pillar portions 12 to the upper end portion 11, or only the left and right pillar portions 12 may be insert molded.

  In the second embodiment, the case where the adhesive 33b (33d) is filled in the upper end portion 11, the passage 33c in the pillar portion 12, and the passages 34c and 35c in the main body portion 13 has been described. As an object, only the passage 33c in the section from the left and right pillar portions 12 to the upper end portion 11 may be filled with the adhesive 33b (33d), or only the passage 33c of the left and right pillar portions 12 may be filled with the adhesive 33b ( 33d) may be filled.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention. .

DESCRIPTION OF SYMBOLS 1 Back door 2 Outer panel 3 Inner panel 4 Back door glass 5 Hinge 6 Latch 7 Harness 10 Window opening 11 Upper end part 12 Pillar part 13 Main body part 14 Lower end part 15 Latch accommodating part 20, 30, 21, 31 Peripheral part 23 Reinforcement rib 25 Second vertical rib 32 Seal surface 33, 34, 35 Reinforcing rib 33a, 34a Meandering rib 33b, 33d, 53b Adhesive 33c, 34c, 35c Passage 33f, 34f, 35f, 53f Reinforcing long fiber 51 Vertical wall 52, 53 1st vertical rib 55 reinforcement board

Claims (7)

A resin back door latch peripheral structure provided to be openable and closable at the rear opening of the vehicle body,
An outer panel and an inner panel made of a resin molded product having a window opening on the upper part are integrally joined at their peripheral edge and the peripheral edge of the window opening, and an upper end that defines the upper edge of the window opening is A latch that is pivotally connected to the upper side of the rear opening of the vehicle body via a hinge and that can be engaged with and disengaged from a striker fixed to the lower side of the rear opening of the vehicle body is provided below the window opening of the inner panel. A wire cable that is accommodated in the latch accommodating portion, an internal space is formed between the outer panel and the inner panel, and the upper end portion and the main body portion below the window opening are connected to the internal space; In the structure around the latch of the resin back door where the harness is routed,
The latch housing portion includes a vertical wall portion erected in the internal space from the inner surface of the inner panel,
A first vertical rib extending from the vertical wall portion of the latch housing portion toward a lower end portion of the inner panel is erected, and is reinforced in a cross section of the inner panel adjacent to the base portion or the base portion of the first vertical rib. The long fiber is insert molded,
The outer panel includes a second vertical rib standing in the internal space adjacent to the first vertical rib, and an edge of the second vertical rib is applied along a base portion of the first vertical rib. A latch peripheral structure of a resin back door, characterized in that it is bonded and fixed by a bonded adhesive.   The latch peripheral structure of the resin back door according to claim 1, wherein the latch housing portion has a box shape configured to surround the latch by the vertical wall portion.   A pair of ribs are provided so as to extend outward in the vehicle width direction from the vertical wall portion outside in the vehicle width direction of the latch housing portion, and the wire cable and / or harness is routed between the pair of ribs. The resin back door according to claim 1 or 2, wherein a passage is formed, and the reinforcing long fibers are insert-molded in a cross section of the inner panel along the passage. Latch peripheral structure.   A pair of ribs are provided so as to extend outward in the vehicle width direction from the vertical wall portions on both sides of the latch housing portion in the vehicle width direction, and the wire cable and / or the harness is routed between the pair of ribs. A passage is formed, and the passage defines a closed section with the outer panel, and the closed section is filled with the adhesive. 4. A latch peripheral structure of the resin back door according to any one of 3 above.   The meandering ribs for alternately projecting the wire cable and / or the harness meanderingly are provided on opposite side walls of the pair of ribs defining the passage. The latch back peripheral structure of the resin-made back doors of Claim 3 or Claim 4.   6. The reinforcing long fiber is insert-molded in a cross section of the inner panel along a seal surface that is in contact with a peripheral edge portion of the rear opening of the vehicle body. 6. Latch peripheral structure of the resin back door as described.   7. The reinforcing long fiber includes glass long fiber or carbon long fiber, and is insert-molded as a tape-like product that is bundled or woven with an impregnating resin. The resin back door latch peripheral structure as described in any one of the above.

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