JP5903374B2 - Vehicle back door - Google Patents

Description

  The present invention relates to an improvement in a vehicle back door, and more specifically, in a vehicle back door in which a resin door outer member is bonded to a resin door inner member, water that enters between both members from the outside enters the vehicle compartment side. The present invention relates to technology for preventing

  Patent Document 1 includes a substantially rectangular plate-shaped resin door inner member and a resin door upper outer member bonded to the upper portion thereof. On the other hand, the door inner member is formed with a recess into which the projection piece is fitted, and the projection piece is adhered to the bottom surface of the recess with the projection piece fitted into the recess. A vehicular back door provided with a maze structure that prevents water from entering the vehicle compartment from the outside is disclosed. In this back door, the adhesive is applied on the inner side of the boundary line in order to prevent the adhesive from protruding from the boundary line between the protruding piece and the surrounding door inner member.

JP 2011-219000 A (paragraphs 0036, 0042, columns 0052, FIG. 1, FIG. 2, FIG. 5)

  However, the vehicular back door of Patent Document 1 has the labyrinth structure, but since the adhesive is applied to the inner side of the boundary line, a gap is formed between the adhesive and the recess side wall. Then, when a large amount of water enters, there is a possibility that the water that has entered between the door inner member and the door outer member gets over the maze structure and enters the vehicle compartment through the gap.

  The present invention has been made in view of such a point, and the object of the present invention is to allow water that has entered between the door inner member and the door outer member bonded to the door inner member to enter the vehicle compartment side from the bonded portion. It is to prevent.

  In order to achieve the above object, the present invention devises an adhesive structure between a door inner member and a door outer member.

  Specifically, the present invention includes a resin door inner member in which an opening for a window is formed, a resin door outer member that is divided into a door upper outer member and a door lower outer member and is bonded to the door inner member from the outside of the vehicle, A window member that covers the window opening, and an outer peripheral edge of the door upper outer member is located on the upper edge of the window opening and the outer periphery of the door inner member on the upper side of the window opening of the door inner member. The outer peripheral edge of the door lower outer member is bonded to the lower edge of the window opening and the outer peripheral edge of the door inner member on the lower side of the window opening of the door inner member. The outer peripheral edge of the window member is bonded to the lower edge of the door upper outer member on the window opening upper edge, and the door lower on the window opening lower edge. For vehicle back doors that are bonded to the upper edge of the Uta member on the both side edges in the vehicle width direction of the window opening by means of a second adhesive, respectively, on both side edges in the vehicle width direction of the door inner member The following solutions were taken.

  That is, according to the first aspect of the present invention, the bonding surfaces of the window member, the door inner member, and the door outer member have a rectangular ring shape, and project downward from both ends in the vehicle width direction of the lower edge of the door upper outer member. While an upper protruding piece is provided, a lower protruding piece that protrudes upward is provided at both ends in the vehicle width direction of the upper edge of the door lower outer member, and the lower protruding piece is higher than the upper protruding piece. The upper and lower protrusions that are disposed away from the vehicle width direction outer side end of the door inner member in the vehicle width direction and that correspond to the upper and lower protruding pieces of the door inner member are fitted into the upper and lower protruding pieces. In the state in which the side paragraph is formed and the upper and lower protruding pieces are fitted in the upper and lower paragraphs, the upper protruding piece and the door inner member around the upper protruding piece are flush with each other. Upper boundary of The outer line portion extending in the vehicle width direction at the lower end of the upper protruding piece, the intermediate line portion extending linearly upward from the inner end in the vehicle width direction of the outer line portion, and the vehicle width from the upper end of the intermediate line portion The lower protruding piece and the door inner member around the lower protruding piece are flush with each other, and both lower boundary lines of the lower protruding piece An inner line portion extending in the vehicle width direction at the upper end, an intermediate line portion extending linearly downward from the outer end in the vehicle width direction of the inner line portion, and an outer line portion extending outward in the vehicle width direction from the lower end of the intermediate line portion The first adhesive is provided along the intermediate line portion in the upper and lower paragraph portions, and the second adhesive straddles the intermediate line portion and the door inner member and the door outer member Provided on And said that you are.

  According to a second invention, in the first invention, a portion corresponding to the intermediate line portion of the door inner member and at least one of the upper and lower protruding pieces has a notch portion opened to the intermediate line portion side. It is provided that the first adhesive and the second adhesive are joined at the notch.

  According to the first invention, the upper boundary line between the upper protruding piece and the door inner member around the upper protruding piece is fitted at the lower end of the upper protruding piece with the upper protruding piece fitted in the upper paragraph of the door inner member. It has an outer line portion extending in the width direction and an intermediate line portion extending linearly upward from the inner end in the vehicle width direction of the outer line portion, and this intermediate line portion is set long in the vertical direction, that is, in the direction of gravity. can do. Therefore, water entering from outside tries to enter the passenger compartment side along the boundary line, but the intermediate line portion extends long in the direction of gravity, so it enters upward along the intermediate line portion against gravity. It is difficult to do. Therefore, it is possible to prevent water from entering the passenger compartment side along the boundary line. On the other hand, since the lower boundary line of the lower protruding piece and the door inner member around it is formed in the same manner as the upper boundary line, water can be prevented from entering the passenger compartment along the lower boundary line. can do.

  In addition, the first adhesive is provided along the intermediate line portion in the upper and lower paragraphs, and the second adhesive is provided on the door inner member and the door outer member across the intermediate line portion. The portion where the agent and the second adhesive overlap at the intermediate line portion to close or narrow the gap between them can be set long in the vertical direction. Therefore, it can prevent more reliably that water approachs against gravity along the intermediate line part.

  According to the second invention, the door inner member and the cutout portion that opens to the intermediate line portion side are provided at a portion corresponding to at least one intermediate line portion of the upper and lower protruding pieces, and the first adhesive and the second adhesive are provided. Since the agent is bonded at the notch, the water entrance can be completely blocked at the bonded portion.

It is a disassembled perspective view of the back door for vehicles concerning an embodiment. It is the II section enlarged plan view of Drawing 1 in the state where the door outer member was pasted up to the door inner member. FIG. 3 is a cross-sectional view corresponding to the line AA in FIG. 2 in a state where a window member is bonded. FIG. 3 is a cross-sectional view corresponding to the line BB in FIG. 2 in a state in which a window member is bonded. It is CC sectional view equivalent to the CC arrow of FIG. 2 in the state which bonded the window member. FIG. 3 is a cross-sectional view corresponding to the line D-D in FIG. 2 in a state where a window member is bonded. FIG. 7 is an enlarged plan view of a portion VII in FIG. 1 in a state in which a door outer member is bonded to a door inner member. FIG. 8 is a cross-sectional view corresponding to the line EE in FIG. 7 in a state where the window member is bonded. FIG. 9 is a view corresponding to FIG. 2 of a vehicle back door according to a modified example. FIG. 10 is a cross-sectional view corresponding to the arrow line B′-B ′ in FIG. 9 in a state where the window member is bonded. FIG. 10 is a cross-sectional view corresponding to the arrow line D′-D ′ in FIG. 9 in a state where the window member is bonded.

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

  FIG. 1 shows a vehicle back door (hereinafter referred to as a back door) 1 according to the present embodiment. The back door 1 opens and closes a back door opening (not shown) at the rear end of a vehicle body (not shown) of the hatchback vehicle in the vertical direction. Winkers (not shown) are provided at positions corresponding to the left and right lower halves of the back door opening of the vehicle body, and the lower half of the back door 1 is exposed to the rear of the vehicle body. The width of the part becomes narrower as it goes down. The back door 1 includes a substantially rectangular resin door inner member 3, a door outer member 5 assembled to the door inner member 3 from the outside of the vehicle, and a window member 7 made of glass or resin.

  The door inner member 3 is made of a thermoplastic resin containing a fiber reinforcing material such as PP-GF (Polypropylene Glass Fiber) or PP-CF (Polypropylene Carbon Fiber). The door inner member 3 is a single piece, and has a main body 8 whose upper half is trapezoidal and whose left and right widths become narrower as the lower half goes downward. A ring-shaped outer standing wall 9 is provided so as to rise to the door outer member 5 side as a whole, and an outer flange 11 for joining is provided on the entire protruding end of the outer standing wall 9 so as to project outward. It has been. A window opening 13 extending left and right is formed in the upper half of the door inner member 3, and a pair of hinge mounting portions 15, 15 are provided above the window opening 13 with a space left and right. ing. An annular inner standing wall 17 protrudes from the entire inner peripheral edge of the window opening 13 so as to rise toward the door outer member 5, and a joint inner flange is formed at the entire protruding end of the inner standing wall 17. 19 is provided so as to project inside the window opening 13. A light attachment portion 21 to which a license plate (not shown) illumination light (not shown) is attached is provided at the center in the left-right direction between the lower edge of the inner standing wall 17 and the lower edge of the outer standing wall 9. A lock device (not shown) that is formed and attached to the lower end thereof, that is, the center in the left-right direction of the lower edge of the outer standing wall 9 is engaged with and released from a striker (not shown) fixed to the vehicle body. A mounting portion 23 is formed.

  The said door outer member 5 is divided | segmented into the resin door upper outer member 29 and the resin door lower outer member 31, and both division members consist of thermoplastic resins, such as PP (Polypropylene) containing talc.

  The door upper outer member 29 has a substantially rectangular plate shape that is elongated to the left and right, and a step that is recessed forward of the vehicle body is formed on the entire bottom edge. The outer peripheral edge of the door upper outer member 29 is made of urethane adhesive on the upper edge of the window opening 13 and the outer peripheral edge of the door inner member 3 above the window opening 13 of the door inner member 3. 1 is bonded via an adhesive 33 (see FIGS. 3 and 4). That is, the outer peripheral edge portion of the door upper outer member 29 is bonded to the upper side portion 19a of the inner flange 19, the upper side portion 11a of the outer flange 11 and the upper end portions of the left and right side portions 11b.

  On the other hand, the door lower outer member 31 has a substantially rectangular plate shape whose lateral width becomes narrower as it goes downward, and a step that is recessed forward of the vehicle body is formed on the entire upper edge. The outer peripheral edge portion of the door lower outer member 31 is located below the window opening 13 of the door inner member 3 at the lower edge of the window opening 13 and the outer peripheral edge of the door inner member 3 via the first adhesive 33. Are glued together. That is, the outer peripheral edge portion of the door lower outer member 31 includes a lower side portion 19b of the inner flange 19, a lower side portion 11c of the outer flange 11, and a lower portion of the left and right side portions 11b of the outer flange 11 from the lower end of the central portion. It is glued. A number plate attaching portion 31 a is formed at the center of the door lower outer member 31.

  The window member 7 has a rectangular plate shape, a region corresponding to the window opening 13 is transparent, and an outer region thereof is concealed by black ceramics or the like. The window member 7 includes a step between the lower step of the door upper outer member 29 and the step of the upper end of the door lower outer member 31 in a state where the door upper outer member 29 and the door lower outer member 31 are bonded to the door inner member 3. It is inserted in between. The outer peripheral edge of the window member 7 is located on the lower end edge of the door upper outer member 29 on the upper end edge side of the window opening 13 and on the lower end edge side of the window opening 13 on the door lower outer member 31. A second adhesive made of a urethane-based adhesive on the left and right side edges of the door inner member 3, that is, on the left and right side edges of the outer flange 11, respectively, on the both side edge sides of the window opening 13 in the vehicle width direction. It adhere | attaches through the agent 35 (refer FIGS. 3-5). That is, the bonding surface 37 (see FIG. 2) between the window member 7, the door inner member 3, and the door outer member 5 has a rectangular ring shape.

  Next, an adhesion structure between the door upper outer member 29 and the door inner member 3 will be described with reference to FIGS. 2 is an enlarged plan view of a portion II in FIG. 1 in a state where the door upper outer member 29 is bonded to the door inner member 3, and FIG. 3 is a cross-sectional view corresponding to the line AA in FIG. 4 is a cross-sectional view corresponding to the line BB in FIG. 2 in a state where the window member 7 is bonded, FIG. 5 is a cross-sectional view corresponding to the line CC in FIG. 2 in a state where the window member 7 is bonded, FIG. FIG. 3 is a cross-sectional view corresponding to the line D-D in FIG. 2 in a state where a window member 7 is bonded. In the following, the bonding structure between the lower right end portion of the door upper outer member 29 and the door inner member 3 will be described, but the bonding structure between the lower left end portion of the door upper outer member 29 and the door inner member 3 is also the same structure. In FIG. 2, the window member 7 is omitted.

  As shown in FIGS. 1 and 2, a substantially rectangular plate-like upper protruding piece 29 a that protrudes downward is provided at the right end of the lower edge of the door upper outer member 29. On the other hand, as shown in FIG. 4, an upper paragraph 39 into which the upper protruding piece 29a is fitted is formed at a portion of the outer flange 11 corresponding to the upper protruding piece 29a. The upper protruding piece 29a has an L-shaped cross section and is fitted into the upper paragraph 39 so that the tip of the short side abuts the bottom of the upper paragraph 39 and the long side is the upper protruding piece 29a. It is flush with the surrounding outer flange 11. As shown in FIG. 4, a rib 9 a that secures the thickness of the second adhesive 35 and blocks the second adhesive 35 is provided at the tip of the outer standing wall 9.

  As shown in FIG. 2, the upper boundary line 41 between the upper protruding piece 29 a and the outer flange 11 around the upper protruding piece 29 a includes an upper outer line portion 41 a extending left and right at the lower end of the upper protruding piece 29 a, and the upper outer line portion. The upper intermediate line portion 41b extends linearly upward from the left end of 41a, and the upper inner line portion 41c extends horizontally from the upper end of the upper intermediate line portion 41b to the left side. That is, the upper intermediate line portion 41b can be set longer in the vertical direction, that is, in the direction of gravity. Therefore, water entering from the outside tends to enter the passenger compartment side along the upper boundary line 41, but the upper intermediate line portion 41b extends in the direction of gravity. It is difficult to enter upward along 41b. Therefore, water can be prevented from entering the passenger compartment side along the upper boundary line 41.

  The first adhesive 33 is provided along the upper intermediate line portion 41b in the upper paragraph 39, and the second adhesive 35 removes the upper intermediate line portion 41b as shown in FIG. It is provided on the outer flange 11 and the upper protruding piece 29a. Then, as shown in FIG. 6, the first adhesive 33 and the second adhesive 35 overlap in the vertical direction, and the gap between the door inner member 3 and the door upper outer member 29 is bonded to both. Agents 33 and 35 are blocked or narrowed. Therefore, the part which the 1st adhesive agent 33 and the 2nd adhesive agent 35 overlapped with the upper side intermediate | middle line part 41b, and closed or narrowed the gap between both can be set long in the up-down direction. Accordingly, it is possible to more reliably prevent water from entering upward against the gravity along the upper intermediate line portion 41b.

  Next, an adhesion structure between the door lower outer member 31 and the door inner member 3 will be described with reference to FIGS. 1, 7, and 8. 7 is an enlarged plan view of a portion VII in FIG. 1 in a state in which the door lower outer member 31 is bonded to the door inner member 3, and FIG. 8 is a cross-sectional view corresponding to the line EE in FIG. 7 in a state in which the window member 7 is bonded. In the following, the bonding structure between the upper right end portion of the door lower outer member 31 and the door inner member 3 will be described, but the bonding structure between the left upper end portion of the door lower outer member 31 and the door inner member 3 is also the same structure. In FIG. 7, the window member 7 is omitted.

  As shown in FIG. 7, a rectangular plate-like lower protruding piece 31b protruding upward is provided at the right end of the upper edge of the door lower outer member 31. As shown in FIG. 1, the lower protruding piece 31b is disposed farther leftward from the right end of the door inner member 3 than the upper protruding piece 29a. On the other hand, as shown in FIG. 8, a lower paragraph portion 43 into which the upper protruding piece 29a is fitted is formed at a portion of the outer flange 11 corresponding to the lower protruding piece 31b. The lower protruding piece 31b has a substantially L-shaped cross section, and in a state where the lower protruding piece 31b is fitted into the lower paragraph portion 43, the tip of the short side portion comes into contact with the bottom surface of the lower paragraph portion 43, and the long side portion thereof It is flush with the outer flange 11 around the lower protruding piece 31b. The bent portion of the lower protruding piece 31b is provided with a rib 31c protruding toward the window member 7, and the rib 31c has the thickness of the second adhesive 35 similar to the rib 9a. And securing the second adhesive 35.

  Then, the lower boundary line 45 between the lower protruding piece 31b and the outer flange 11 around the lower protruding piece 31b is, as shown in FIG. 7, a lower inner line portion 45a extending left and right at the upper end of the lower protruding piece 31b. And a lower intermediate line portion 45b extending linearly downward from the right end of the lower inner line portion 45a, and a lower outer line portion 45c extending horizontally from the lower end of the lower intermediate line portion 45b to the right side. . That is, the lower intermediate line portion 45b can be set longer in the vertical direction, that is, in the direction of gravity. Therefore, water entering from the outside tends to enter the passenger compartment along the lower boundary line 45, but the lower intermediate line portion 45b extends in the direction of gravity, so that the lower side against gravity It is difficult to enter upward along the intermediate line portion 45b. Therefore, it is possible to prevent water from entering the passenger compartment side along the lower boundary line 45.

  The first adhesive 33 is provided along the lower intermediate line portion 45b in the lower paragraph 43, and the second adhesive 35 straddles the lower intermediate line portion 45b. It is provided on the flange 11 and the lower protruding piece 31b. Thus, the first adhesive 33 and the second adhesive 35 overlap in the vertical direction, and the adhesives 33 and 35 close or narrow the gap between the door inner member 3 and the door lower outer member 31. ing. Therefore, the part which the 1st adhesive agent 33 and the 2nd adhesive agent 35 overlapped by the lower side intermediate | middle line part 45b and block | closed the gap between them, or narrowed can be set long to an up-down direction. Therefore, it is possible to more reliably prevent water from entering upward against the gravity along the lower intermediate line portion 45b.

<Modification>
In the embodiment described above, the intermediate line portions 41b and 45b have a constant width throughout, but a part thereof may be widened. A vehicle back door according to a modification will be described with reference to FIGS. 9 and 10. 9 is a view corresponding to FIG. 2 of the vehicle back door according to the modification, FIG. 10 is a cross-sectional view corresponding to the arrow B′-B ′ in FIG. 9 in a state where the window member 7 is bonded, and FIG. FIG. 10 is a cross-sectional view corresponding to the arrow line D′-D ′ in FIG. 9 in a bonded state.

  A cutout portion 47 that opens to the upper intermediate line portion 41b side, that is, the left side is provided at a portion corresponding to the upper intermediate line portion 41b of the upper protruding piece 29a. Then, as shown in FIG. 10, the first adhesive 33 and the second adhesive 35 are joined at the notch 47, and as shown in FIG. 11, a part of the upper intermediate line portion 41b in the vertical direction. It is blocking. Thus, since the 1st adhesive agent 33 and the 2nd adhesive agent 35 are joined in the notch part 47, the approach path of water can be completely plugged up in this joined part. In this modification, the notch 47 is provided in the upper protruding piece 29a, but may be provided in a portion corresponding to the upper intermediate line portion 41b of the outer flange 11. Or the notch part 47 may be provided in both the upper side protrusion piece 29a and the outer side flange 11. FIG. Further, in the present modification, the notch 47 is provided in the upper protruding piece 29a, but may be provided in the lower protruding piece 31b.

  As described above, the vehicular back door according to the present invention is applied to applications such as preventing water that enters between the door inner member and the door outer member bonded thereto from entering the vehicle compartment side from the bonded portion. can do.

DESCRIPTION OF SYMBOLS 1 Vehicle back door 3 Door inner member 5 Door outer member 7 Window member 13 Window opening 33 First adhesive 35 Second adhesive 29 Door upper outer member 29a Upper protruding piece 31 Door lower outer member 31b Lower protruding piece 37 Window member Bonding surface 39 with door inner member and door outer member Upper paragraph portion 41 Upper boundary line 41a Upper outer line portion 41b Upper intermediate line portion 41c Upper inner line portion 43 Lower paragraph portion 45 Lower boundary line 45a Lower inner line portion 45b Lower side Middle line part 45c Lower outer line part 47 Notch

Claims (2)

A resin door inner member (3) having a window opening (13) formed therein, a door upper outer member (29) and a door lower outer member (31), and the resin bonded to the door inner member (3) from the outside of the vehicle A door outer member (5) and a window member (7) covering the window opening (13), and the outer peripheral edge of the door upper outer member (29) is the window of the door inner member (3). The upper opening (13) is bonded to the upper edge of the window opening (13) and the outer peripheral edge of the door inner member (3) via a first adhesive (33), and the door lower outer member (31) The outer peripheral edge is formed on the lower edge of the window opening (13) and on the outer peripheral edge of the door inner member (3) below the window opening (13) of the door inner member (3). (33) and the window member (7) has an outer peripheral edge that is connected to the window opening (13) on the upper edge side of the window upper outer member (29) on the lower edge of the window. Opening (13) on the lower edge side of the door lower outer member (31) on the upper edge of the door opening (13) on both sides in the vehicle width direction of the window opening (13) on both sides in the width direction of the door inner member (3) Vehicular backdoors bonded to the edges via a second adhesive (35),
The bonding surface (37) of the window member (7) and the door inner member (3) and the door outer member (5) has a rectangular ring shape,
On both ends in the vehicle width direction of the lower end edge of the door upper outer member (29), there are provided upper protruding pieces (29a) protruding downward, while on the both ends of the door lower outer member (31) in the vehicle width direction of the upper end edge Is provided with a lower projecting piece (31b) projecting upward, and the lower projecting piece (31b) is located closer to the outer side in the vehicle width direction of the door inner member (3) than the upper projecting piece (29a). It is arranged away from the inside in the vehicle width direction,
The upper and lower paragraphs (39, 39) into which the upper and lower protruding pieces (29a, 31b) are fitted in the portions corresponding to the upper and lower protruding pieces (29a, 31b) of the door inner member (3). 43) is formed,
With the upper and lower protruding pieces (29a, 31b) fitted in the upper and lower paragraphs (39, 43), the upper protruding piece (29a) and the door inner member (3) around it. The upper boundary line (41) between the two is composed of an outer line portion (41a) extending in the vehicle width direction at the lower end of the upper protruding piece (29a) and a vehicle of the outer line portion (41a). While having an intermediate line portion (41b) extending linearly upward from the inner end in the width direction and an inner line portion (41c) extending inward in the vehicle width direction from the upper end of the intermediate line portion (41b) The side protruding piece (31b) and the door inner member (3) around the side protruding piece (31b) are flush with each other, and the lower boundary line (45) of both of them is at the upper end of the lower protruding piece (31b) in the vehicle width direction. An inner line portion (45a) extending inward, an intermediate line portion (45b) extending linearly downward from an outer end in the vehicle width direction of the inner line portion (45a), and a vehicle width direction from the lower end of the intermediate line portion (45b) Has an outer line portion which extends outwardly and (45 c),
The first adhesive (33) is provided along the intermediate line (41b, 45b) in the upper and lower paragraphs (39, 43), and the second adhesive (35) A vehicle back door characterized by being provided on the door inner member (3) and the door outer member (5) across a line portion (41b, 45b). The vehicle back door according to claim 1,
The door inner member (3) and the upper and lower projecting pieces (29a, 31b) have at least one intermediate line portion (41b, 45b) corresponding to the intermediate line portion (41b, 45b) side. A notch (47) is provided that opens,
The back door for a vehicle, wherein the first adhesive (33) and the second adhesive (35) are joined at the notch (47).

Images