JP6232322B2 - Vehicle back door - Google Patents

Description

  The present disclosure relates to an improvement in a vehicle back door. Specifically, the present disclosure relates to a countermeasure against scattering of a panel at the time of a vehicle collision of a vehicle back door provided with a door body made of a resin panel.

  Patent Document 1 discloses a vehicle back door that includes a door main body formed by joining a resin inner panel and a resin outer panel, and a window portion is provided in an upper half portion of the door main body. This back door has metal side reinforcement brackets (reinforcement) that reinforce the inner panel at the left and right sides of the inner panel from the upper half to the lower half of the inner panel. It has a structure in which a metal latch mounting bracket (lock reinforcement) for mounting a latch that engages with a striker provided in the main body is mounted.

  And in this back door, in order to prevent the panel which comprises a door main body from scattering by the damage at the time of the rear surface collision of a vehicle, it is wired in the internal space of the lower part located below a window part among door bodies. Is provided. The wire is constructed along the outer peripheral edge of the inner panel with the upper end connected to the side reinforcing bracket and the lower end connected to the latch mounting bracket.

JP 2010-159037 A

  In the back door of Patent Document 1, both ends of the wire are connected to the vehicle body via side reinforcing brackets and latch mounting brackets, but the wires remain on the inner panel and the outer panel except for both ends. And it is constructed along the outer-periphery edge part of an inner panel. For this reason, at the center part of the lower part of the door body, there is a possibility that a panel constituting the part will be scattered at the time of a rear collision of the vehicle and a large hole may be opened in the door body. desired.

  Therefore, as a countermeasure against scattering of the panel, the outer panel is made tougher than the inner panel, and in the inner space in the lower part of the door body, a stretchable reinforcing sheet is bonded to the outer panel and spread. By providing, even if the panel which comprises the center part in the said lower part scatters, it is possible to leave a reinforcement sheet-like thing in the location corresponding to the scattering part of a panel.

  However, depending on the degree of rear collision and the severity of the vehicle, the lower edge part of the lower part of the door body along the adhesion part with the outer panel is damaged in the inner panel. There is a possibility that the reinforcing sheet-like object is separated from the inner panel together with the outer panel. As a result, the interior space of the door body is opened to the outside of the vehicle, and even if a reinforcing sheet-like material is provided on the outer panel, if the inner panel is severely damaged, a large hole is opened in the lower part of the door body. I can not.

  The present invention has been made in view of such points, and an object of the present invention is to prevent the lower panel even if the inner panel and the outer panel constituting the lower portion of the door body are scattered at the time of a rear surface collision of the vehicle. It is in providing the vehicle back door which can prevent that a big hole opens in a part.

  In order to achieve the above object, in the present invention, the toughness of the outer panel is made higher than the toughness of the inner panel, and a reinforcing sheet-like material having extensibility in the inner space in the lower part of the door body is bonded to the outer panel. The reinforcing sheet-like material is attached to a bracket used for attaching to the inner panel of the engagement device that engages with the vehicle body, and the bracket and the portion of the outer panel to which the number plate is attached. I fixed it in between.

  Specifically, the present invention relates to a vehicle back-and-forth vehicle that is used in a so-called hatchback vehicle and includes a door body that is formed by bonding a resin inner panel and a resin outer panel so as to face each other. Targeting doors. The inner panel is a panel located on the inner side of the vehicle with the back door attached to the vehicle body. On the other hand, the outer panel is a panel located outside the vehicle with the back door attached to the vehicle body.

  In this vehicular back door, an internal space is provided between an inner panel and an outer panel constituting the door body. The door body includes an upper portion that constitutes an upper portion and is provided with a window portion, and a lower portion that is positioned below the upper portion. The inner panel side of the inner panel along the lower edge of the lower part is detachably engaged with the lower edge of an opening (hereinafter referred to as a back door opening) provided at the rear end of the vehicle body. A metal engaging device mounting bracket for mounting the engaging device is attached.

  The engagement device is, for example, a latch that constitutes a lock device that locks the back door to the vehicle body or a striker that engages with the latch. Moreover, the hinge fixed to the upper edge part of a back door opening among vehicle body main bodies is attached to the part located above a window part among the upper parts of a door main body. The vehicle back door targeted by the present invention is a door that can open and close the opening of the vehicle body body by rotating in the vertical direction around the hinge.

  And this invention takes the following solution means in the vehicle back door of the said structure.

  That is, the first invention has a configuration in which the toughness of the outer panel is higher than the toughness of the inner panel. Moreover, the part which comprises a lower part among outer panels has a plate attaching part to which a number plate is attached to the middle in the up-down direction. In the inner space in the lower portion of the door body, the reinforcing sheet having stretchability adhered to the outer panel at least at both portions along the upper and lower edges of the lower portion in a state of being widened in the vehicle width direction. A shape is provided. In the first invention, the engagement device mounting bracket has an extending portion that extends upward and is located on the inner space side of the plate mounting portion, and the extending portion is reinforced between the plate mounting portion and the plate mounting portion. The sheet-like material is sandwiched and fixed to the plate mounting portion.

  According to a second aspect of the present invention, in the vehicle back door of the first aspect, the wiper device for wiping the window portion of the door body is attached to the inner space side of the portion of the inner panel located above the plate mounting portion. A wiper device mounting bracket is attached. In the second invention, the wiper device mounting bracket is provided integrally with the engaging device mounting bracket, or is provided separately from the engaging device mounting bracket and connected to the engaging device mounting bracket. It is characterized by being.

  According to the first invention, the reinforcing sheet-like material is attached to the inner space in the lower portion of the door body in the vertical direction in a state where the reinforcing sheet-like material is spread in the vehicle width direction by bonding to the outer panel having higher toughness than the inner panel. In addition to providing an extension portion extending upward to an engagement device mounting bracket used for mounting the engagement device that engages with the vehicle body to the inner panel, between the extension portion and the plate mounting portion. Since the reinforcing sheet-like material is sandwiched and fixed, even if the lower edge portion of the lower part of the door body is broken along the inner panel along the adhesion portion with the outer panel, the reinforcing sheet-like material is It is secured by the engagement device mounting bracket. Since the engaging device mounting bracket fixes the middle portion in the vertical direction of the reinforcing sheet-like material to the plate attaching portion, the retaining effect of the reinforcing sheet-like material is high. This prevents the reinforcing sheet-like material from being separated from the inner panel as well as the outer panel, and prevents the inner space of the lower part from being completely opened outside the vehicle without the reinforcing sheet-like material. Moreover, since the reinforcing sheet-like material has stretchability, even if the lower portion of the door main body is greatly deformed, it is stretched according to the deformation, can withstand the impact at the time of rear collision of the vehicle, and is difficult to tear. Therefore, even if both panels constituting the lower portion of the door body are scattered at the time of a rear collision of the vehicle, a reinforcing sheet-like material can be left at a location corresponding to the panel scattering portion of the lower portion. It is possible to prevent a large hole from opening in the part.

  In addition, according to the first invention, since the extension portion of the engagement device mounting bracket is fixed to the outer panel on the back side of the plate mounting portion, the fixing portion of the extension portion of the outer panel is a license plate. Can be hidden. As a method of fixing the extending portion of the engagement device mounting bracket to the outer panel, for example, there are a method of bonding with an adhesive and a method of fastening with a fastener such as a bolt or a rivet. When fixing the said extension part to an outer panel by the former method, there exists a possibility that the distortion by adhesion | attachment may arise in the fixing location of an extension part among outer panels. On the other hand, when fixing the said extension part to an outer panel by the latter method, a fastener will exist in the fixing location of an extension part among outer panels. According to the present invention, since distortion and fasteners due to adhesion are hidden by the number plate, the design of the back door does not deteriorate due to fixing the extension portion of the engagement device mounting bracket to the outer panel. .

  According to the second invention, the wiper device mounting bracket for mounting the wiper device on the inner panel is provided integrally with the engaging device mounting bracket or connected separately, so that when the rear collision of the vehicle occurs, It is possible to prevent the wiper device from flying off the back door by impact.

FIG. 1 is a perspective view showing a rear part of a vehicle body to which a vehicle back door according to Embodiment 1 of the present invention is attached. FIG. 2 is an exploded perspective view of the vehicle back door according to the first embodiment of the present invention. FIG. 3 is an inner surface view showing the surface of the inner panel according to the first embodiment of the present invention on the side opposite to the outer panel together with a reinforcing sheet-like object (two-dot chain line). 4 is a cross-sectional view of the back door taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view of the back door taken along line VV in FIG. 6 (a) and 6 (b) are process diagrams showing a bonding process of the reinforcing sheet-like material to the outer lower panel according to Embodiment 1 of the present invention. FIGS. 7A and 7B are process diagrams showing the assembly work of the door body of the vehicle back door according to the first embodiment of the present invention. FIG. 8 is a cross-sectional view illustrating an example of a state of the lower portion at the time of a rear collision of the vehicle back door according to the first exemplary embodiment of the present invention. FIG. 9 is a perspective view showing the lower part of the back door and its periphery in the rear part of the vehicle body to which the vehicle back door according to the second embodiment of the present invention is attached. FIG. 10 is an exploded perspective view of the vehicle back door according to the second exemplary embodiment of the present invention. 11 is a cross-sectional view of the back door taken along line XI-XI in FIG. FIG. 12 is a cross-sectional view illustrating an example of a state of the lower portion at the time of a rear collision of the vehicle back door according to the second exemplary embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use. In the following embodiments, for convenience of explanation, the front side in the vehicle front-rear direction is referred to as “front”, the rear side is referred to as “rear”, the left side in the vehicle width direction facing the front of the vehicle is “left”, and the right side is “ The upper side in the vehicle height direction is referred to as “upper”, and the lower side is referred to as “lower”.

Embodiment 1 of the Invention
FIG. 1 is a perspective view showing a rear part of a vehicle body to which a vehicle back door 1 according to Embodiment 1 is attached. As shown in FIG. 1, the back door 1 is a vertically openable back door that opens and closes a back door opening 103 provided at a rear end of a vehicle body body 101 of a hatchback vehicle. A rear lamp 105 such as a stop lamp or a blinker is provided at a position corresponding to the lower half of the left and right sides of the back door opening 103 of the vehicle. In the back door 1 of the present embodiment, in order to expose the rear lamps 105 to the rear of the vehicle body, the width in the left-right direction of the lower half of the back door 1 becomes narrower.

  FIG. 2 is an exploded perspective view of the back door 1. In FIG. 2, only a side reinforcing bracket 45 on the right side is shown in a pair of side reinforcing brackets 45 described later, and the side reinforcing bracket 45 on the left side is not shown. As shown in FIG. 2, the back door 1 includes a door body 3 made of resin panels 7 and 9 and a resin or glass window panel 5 held in the upper half of the door body 3. The door body 3 has a structure in which a window portion 6 (see FIG. 1) is provided at a location corresponding to the window panel 5.

  As shown in FIG. 1, the door main body 3 includes an upper portion 3a that constitutes an upper portion and is provided with a window portion 6, and a lower portion 3b that is positioned below the upper portion 3a. As shown in FIG. 2, the door body 3 is in a state in which a resin inner panel 7 located on the vehicle inner side (front side) and a resin outer panel 9 located on the vehicle outer side (rear side) are opposed to each other. Bonded. An internal space S (shown in FIGS. 4 and 5 to be referred to later) is provided between the inner panel 7 and the outer panel 9.

  The inner panel 7 is a single panel, and includes, for example, fiber reinforcing materials such as polypropylene (PP-GF) or polypropylene (PP-CF) containing glass fiber. Made of thermoplastic resin. On the other hand, the outer panel 9 is divided into upper and lower parts, and includes an outer upper panel 9a positioned on the upper side and an outer lower panel 9b positioned on the lower side. The window panel 5 is attached between the outer upper panel 9a and the outer lower panel 9b.

  The outer upper panel 9a and the outer lower panel 9b are made of, for example, a resin obtained by mixing polypropylene (PP-T: Polypropylene Talc) with talc or ethylene propylene diene methylene rubber (EPDM). Accordingly, the toughness of the outer upper panel 9a and the outer lower panel 9b is higher than the toughness of the inner panel 7. On the other hand, the rigidity of the inner panel 7 is higher than the rigidity of the outer upper panel 9a and the outer lower panel 9b.

  FIG. 3 is an internal view showing a surface of the inner panel 7 facing the outer panel 9, that is, a surface on the vehicle rear side, together with a reinforcing sheet-like material 93 (two-dot chain line) described later. 4 is a cross-sectional view of the back door 1 taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view of the back door 1 taken along the line V-V in FIG.

  As shown in FIGS. 3 to 5, the inner panel 7 includes a main body 11 that faces the outer panel 9 in the front-rear direction and forms the main body of the panel 7. The upper half portion of the main body 11 is formed in a substantially trapezoidal shape with the width in the left-right direction becoming wider toward the lower half portion, and the lower half portion goes downward along the outer shape of the left and right rear lamps 105. It is formed in a shape with a narrow width in the left-right direction.

  A window opening 13 extending in the vehicle width direction (left-right direction) is formed in the upper half portion of the main body 11 of the inner panel 7. The window opening 13 is formed in a substantially trapezoidal shape similar to the upper half portion of the main body 11 of the inner panel 7. Of the inner panel 7, the upper half part including the window opening 13 constitutes the upper part 3 a of the door body 3, and the part located below the window opening 13 constitutes the lower part 3 b of the door body 3. It is composed.

  An outer standing wall 15 that rises toward the outer panel 9 (rear side of the vehicle) is provided on the outer peripheral edge of the main body 11 of the inner panel 7 in an annular shape over the entire circumference. An outer flange 17 for joining is provided on the entire rear end of the outer standing wall 15 so as to project outward. Further, an inner standing wall 19 that rises toward the outer panel 9 (rear side of the vehicle) is provided annularly around the window opening 13 of the main body 11 in the inner panel 7 over the entire circumference. On the entire rear end of the inner standing wall 19, an inner flange 21 for bonding is provided so as to project inward of the window opening 13.

  Positioning convex portions used for positioning the outer lower panel 9b in the vertical and horizontal directions when the outer lower panel 9b is assembled to the inner panel 7 are located on the left and right sides of the inner panel 7 near the lower end of the window opening 13. 23 is provided. Below the positioning projections 23, when the outer lower panel 9b is assembled to the inner panel 7, the outer lower panel 9b is positioned in the front-rear direction, and the outer lower panel 9b is slightly lifted from the inner panel 7. A step forming piece 25 for forming a step is provided.

  As shown in FIG. 2, the outer upper panel 9 a of the outer panel 9 is formed in a strip shape that is elongated in the vehicle width direction (left-right direction). The outer upper panel 9 a faces the portion of the inner panel 7 above the window opening 13 and constitutes the upper portion 3 a of the door body 3. The outer peripheral edge portion of the outer upper panel 9a is the outer peripheral edge portion of the inner panel 7, that is, the upper edge portion and the upper side portion of the left and right sides of the outer flange 17, and the upper edge portion of the window opening 13, that is, the inner flange. It is bonded to the upper side portion of 21 with an adhesive. At the lower edge of the outer upper panel 9a, a step portion 27 recessed forward is provided over the entire vehicle width direction.

  On the other hand, the outer lower panel 9b is formed in a shape in which the left and right widths become narrower toward the lower side corresponding to the shape of the lower half portion of the inner panel 7. The outer lower panel 9 b faces the portion of the inner panel 7 below the window opening 13 and constitutes the lower portion 3 b of the door body 3. As shown in FIGS. 4 and 5, the outer peripheral edge of the outer lower panel 9 b is the outer peripheral edge of the inner panel 7, that is, the lower half and the lower side of the left and right sides of the outer flange 17, and the window An adhesive 29 is adhered to the lower edge of the opening 13, that is, the lower edge of the inner flange 21.

  That is, the upper edge portion of the lower portion 3b of the door body 3 is an upper edge bonding portion 30a in which the inner flange 21 of the inner panel 7 and the outer lower panel 9b are bonded with the adhesive 29, and the lower edge portion of the lower portion 3b. These are lower edge bonding portions 30b in which the outer flange 17 of the inner panel 7 and the outer lower panel 9b are bonded with an adhesive 29. Furthermore, the left and right side edge portions of the lower portion 3 b are side edge bonded portions 30 c (see FIG. 1) in which the outer flange 17 of the inner panel 7 and the outer lower panel 9 b are bonded with an adhesive 29.

  Further, as shown in FIG. 2, a stepped portion 31 that is recessed forward is provided on the entire upper edge portion of the outer lower panel 9 b in the vehicle width direction. Protruding pieces 33 projecting upward are provided at both left and right end portions of the step portion 31. Each protruding piece 33 is formed with a positioning hole 35 into which the positioning projection 23 of the inner panel 7 is inserted.

  Further, a plate attachment portion 37 to which the number plate 107 (see FIG. 5) is attached is provided at the center portion of the outer lower panel 9b. The plate attachment portion 37 is recessed forward from the periphery thereof, an attachment surface portion 37a inclined forward and upward, a hook-like surface portion 37b extending in the front-rear direction above the attachment surface portion 37a, and an attachment surface portion And a pair of side surface portions 37c extending in the front-rear direction on both right and left sides of 37a.

  The window panel 5 is formed in a substantially trapezoidal shape similar to the portion of the upper half portion of the inner panel 7 excluding the portion corresponding to the outer panel 9. A region corresponding to the window opening 13 in the window panel 5 is a transparent window region 5a, and an outer region thereof is a concealment region 5b concealed by a concealing layer made of black ceramics or the like. The window region 5 a of the window panel 5 constitutes the window portion 6 together with the window opening 13 formed in the inner panel 7.

  The window panel 5 is fitted between a stepped portion 27 at the lower edge of the outer upper panel 9a and a stepped portion 31 at the upper edge of the outer lower panel 9b. And the upper edge part and lower edge part of the window panel 5 are adhere | attached on these both level | step-difference parts 27 and 31 with the adhesive agent 39 from back. Further, the left and right side edge portions of the window panel 5 are bonded to the left and right side edge portions of the inner panel 7, that is, the side edge portions of the outer flange 17 with an adhesive 39.

  The outer upper panel 9a, the outer lower panel 9b, and the portion where the inner panel 7 is bonded are different from the other portions of the door body 3 because the two panels 7, 9a, 9b are overlapped with the adhesive 29. Since it is relatively thick, it has a relatively high strength. The adhesive 29 for bonding the outer upper panel 9a and the outer lower panel 9b to the inner panel 7 is a so-called elastic adhesive having rubber elasticity. The elastic adhesive 29 becomes a rubber-like elastic body when cured, disperses internal stress such as thermal strain, and absorbs external stress such as vibration and impact. As a result, the outer upper panel 9a and the outer lower panel 9b and the inner panel 7 including the upper edge bonding portion 30a, the lower edge bonding portion 30b, and the side edge bonding portion 30c of the lower portion 3b of the door body 3 are bonded. The part is difficult to break.

  Further, the adhesive 39 for bonding the outer upper panel 9a and the outer lower panel 9b and the window panel 5 is also an elastic adhesive, and the bonded portion of both the panels 5, 9a, 9b also absorbs external stress generated in the door body 3. It is like that. As these elastic adhesives 29 and 39, for example, urethane adhesives can be employed.

  As shown in FIG. 2, a portion of the inner panel 7 positioned above the window opening 13, specifically, a portion between the main body 11 and the outer standing wall 15 at the upper edge of the inner panel 7 is shown. In addition, a pair of hinge mounting portions 41 that are recessed on the front side and protrude rearward are provided on both the left and right sides in the vehicle width direction so as to be spaced from each other. An opening / closing hinge (not shown) that is fixed to the upper edge of the back door opening 103 along the vehicle width direction is attached to the pair of hinge mounting portions 41 from the front with a fastener such as a bolt. Is fixed.

  Further, damper mounting holes 43 penetrating the outer standing wall 15 are respectively formed in the middle in the vertical direction among the left and right side portions of the outer standing wall 15 of the inner panel 7. Further, of the upper half portion of the main body 11 of the inner panel 7, a portion extending from the left hinge mounting portion 41 to a location corresponding to the left damper mounting hole 43, and a right damper mounting hole from the right hinge mounting portion 41. A plurality of bracket mounting bosses 44 are provided in a portion extending to a portion corresponding to 43 so as to protrude rearward at intervals. Then, a substantially L-shaped side reinforcing bracket 45 made of a metal plate material is attached to the inner panel 7 by being fastened to the plurality of bracket mounting bosses 44 from the rear with fasteners such as bolts and rivets. .

  At the upper end portion of the side reinforcing bracket 45, a portion corresponding to the hinge mounting portion 41 of the inner panel 7 is provided with a mounting reinforcing portion 47 that is recessed forward and protrudes rearward so as to correspond to the outer shape of the hinge mounting portion 41. ing. The opening / closing hinge is attached to the attachment reinforcing portion 47 with a fastener used for fixing to the hinge attachment portion 41 with the hinge attachment portion 41 of the inner panel 7 interposed therebetween. That is, the open / close hinge is fastened to both the hinge mounting portion 41 of the inner panel 7 and the mounting reinforcing portion 47 of the side reinforcing bracket 45 with a fastener.

  On the other hand, a damper mounting hole 49 is formed at a position corresponding to each damper mounting hole 43 of the inner panel 7 in the lower end side portion of the side reinforcing bracket 45. The lower end of the damper (not shown) for opening and closing the back door 1 is connected to the damper mounting holes 43 of the inner panel 7 and the side reinforcing bracket 45 at the portion of the inner panel 7 where the damper mounting holes 43 are formed. 49 is attached from the side by inserting a fastener such as a bolt. The upper ends of the pair of dampers are fixed at positions closer to the upper portions on the left and right sides of the back door opening 103 of the vehicle body 101. Thus, the side reinforcing bracket 45 is connected to the lower end of the damper and is connected to the vehicle body 101 via the damper.

  The damper is, for example, a cylinder-type stay in which gas is sealed. The damper is extendable in the longitudinal direction, and is urged so as to always expand by the pressure of the gas. The back door 1 can be opened and closed by rotating up and down around the hinge for opening and closing so that the back door opening 103 of the vehicle body 101 can be opened and closed. It is attached to the vehicle body 101 so that a sudden opening / closing operation is prevented by dynamic resistance.

  Further, on the lower side of the inner standing wall 19 in the main body 11 of the inner panel 7, as shown in FIGS. 2, 3 and 5, a wiper device 109 for wiping the outer surface of the window panel 5 and a license plate illumination An interior part mounting portion 51 to which a lamp (not shown) is attached from the front, and a fastener fastening portion 65 for fastening fasteners such as bolts and rivets used to attach the number plate 107 to the plate attachment portion 37, The front side of the inner panel 7 is recessed rearward and is close to the outer lower panel 9b.

  The interior part attachment portion 51 is located above the plate attachment portion 37 of the outer lower panel 9 b and projects over the bowl-shaped surface portion 37 b of the plate attachment portion 37. The interior part mounting portion 51 includes an upper wall portion 51a facing obliquely upward on the rear side, a rear wall portion 51b extending downward from the rear end of the upper wall portion 51a and facing rearward, and a lower end of the rear wall portion 51b. A lower wall portion 51c that extends from the front to the front and faces obliquely downward on the rear side. The wiper device 109 is attached to the interior part attachment portion 51 using a wiper device attachment bracket 52 made of a metal plate member.

  The wiper device mounting bracket 52 is mounted on the inner space S side of the interior component mounting portion 51. The wiper device mounting bracket 52 is formed in a substantially U shape in side view so as to be in contact with the surface shape of the interior component mounting portion 51 on the mounted side, and is formed on the upper wall portion 51a of the interior component mounting portion 51. An upper surface portion 52a along the rear surface portion 52b extending downward from the rear end of the upper surface portion 52a and extending along the rear wall portion 51b of the interior component mounting portion 51, and an interior component mounting portion extending from the lower end of the rear surface portion 52b to the front side. 51 has a lower surface portion 52c along the lower wall portion 51c.

  Wiper openings 53 and 54 through which the wiper device 109 is inserted are provided in the central portion of the upper wall portion 51a of the interior part mounting portion 51 and the central portion of the upper surface portion 52a of the wiper device mounting bracket 52 so as to correspond to each other. It has been. Further, bolt insertion holes 55 are provided on the left and right sides of the wiper opening 53 in the upper wall portion 51 a of the interior part mounting portion 51 and on the left and right sides of the wiper opening 54 in the upper surface portion 52 a of the wiper device mounting bracket 52. 56 are provided one by one so as to correspond to each other. Further, a plurality of the rear wall portions 51b of the interior part mounting portion 51 and the rear surface portion 52b of the wiper device mounting bracket 52 are spaced apart in the vehicle width direction so that the rivet insertion holes 57 and 58 correspond to each other (see FIG. 3 in the example shown in FIG.

  The wiper device mounting bracket 52 has a blind rivet 59 inserted through the rivet insertion hole 57 of the interior part mounting portion 51 and the rivet insertion hole 58 of the wiper device mounting bracket 52 from the front of the inner panel 7. Is attached to the interior part attachment portion 51 by fastening the wiper device attachment bracket 52 to the rear surface portion 52b. Further, the wiper device mounting bracket 52 is fastened together with the wiper device 109 to the upper wall portion 51 a of the interior part mounting portion 51 with a bolt 60.

  The wiper device 109 has laterally protruding brackets 109a on both the left and right sides, and the bracket 109a is fastened to the upper wall portion 51a of the interior component mounting portion 51 with the upper surface portion 52a of the wiper device mounting bracket 52 with a bolt 60. It is attached to the interior part attaching part 51.

  Specifically, the wiper device 109 allows the wiper device 109 to be inserted into both the wiper openings 53 and 54 of the interior part attaching portion 51 and the wiper device attaching bracket 52 attached thereto, and the pair of brackets 109a are provided internally. A bolt fastening hole 110 provided in the bracket 109a, and the bolt insertion holes of the interior part mounting part 51 and the wiper device mounting bracket 52 in this state are addressed to the upper wall part 51a of the part mounting part 51 from obliquely below the front side. The bolt 60 is inserted through 55 and 56, and the tip end side of the bolt 60 is fastened to the upper surface portion 52 a of the wiper device mounting bracket 52, so that the bolt 60 is attached to the interior component mounting portion 51. The wiper device 109 is provided by causing the output shaft 109b of the motor unit to protrude rearward from the wiper insertion hole 61 provided in the outer lower panel 9b.

  In addition, a lamp opening 62 for allowing a license plate illumination lamp to face the plate mounting portion 37 side is provided in a central portion in the left-right direction of the lower wall portion 51c of the interior component mounting portion 51. A notch 63 is provided in the lower surface portion 52 c of the wiper device mounting bracket 52 so as not to block the lamp opening 62. Accordingly, the lower surface portion 52 c of the wiper device mounting bracket 52 is divided into the left and right sides of the lamp opening 62. The license plate illumination lamp faces the interior space S of the door body 3 through the lamp opening 62 and the license plate located below the illumination hole 64 provided in the bowl-shaped surface portion 37b of the plate mounting portion 37. It is attached to the interior part attaching part 51 so as to illuminate 107.

  The fastener fastening portion 65 is located on the front side of the plate attachment portion 37 and faces the attachment surface portion 37a of the plate attachment portion 37 in the front-rear direction. A pair of plate mounting bosses 66 are provided on the left and right sides of the fastener fastening portion 65 so as to protrude rearward. The number plate 107 includes an insertion hole 67 provided in a portion corresponding to each of the plate attachment bosses 66 in the plate attachment portion 37, and an insertion hole (not shown) provided in the number play 107 so as to correspond thereto. Then, a fastener such as a bolt or a rivet is inserted into the plate, and the tip end side of the fastener is fastened to the plate attachment boss 66 of the fastener fastening portion 65, thereby attaching to the plate attachment portion 37. Furthermore, a positioning hole 68 is formed between the pair of plate mounting bosses 66 in the fastener fastening portion 65.

  The main body 11 of the inner panel 7 is provided with a pair of reinforcing ribs 69 extending in the vertical direction from the left and right ends of the fastener fastening portion 53 to the lower side of the outer standing wall 15 so as to protrude rearward. . Further, a portion of the inner panel 7 along the lower edge portion of the lower portion 3 b, specifically, a portion to which the latch 111 is attached between the pair of reinforcing ribs 69 at the lower side portion of the outer standing wall 15. A latch mounting portion 71 is provided as an engaging device mounting portion. The latch mounting portion 71 is a part of the outer standing wall 15 and extends in the front-rear direction.

  The latch 111 is an engagement device that detachably engages with a striker 113 (see FIG. 5) provided at the lower edge of the back door opening 103, and closes the back door 1 in cooperation with the striker 113. Thus, the lock device 115 for locking to the vehicle body 101 is configured. The latch 111 is attached using a latch mounting bracket 72 made of a metal plate member. The latch mounting bracket 72 is mounted on the upper surface of the latch mounting portion 71 on the inner space S side as a rigid member that reinforces the latch mounting portion 71.

  The latch mounting bracket 72 is formed in a shape in which only one side surface portion of the pair of side surface portions facing each other in the shallow channel steel is extended long upward, and is a rectangular shape that is installed on the latch mounting portion 71. The seat surface portion 73, a projecting portion 74 projecting upward from the front end of the seat surface portion 73, and an extending portion 75 extending upward from the rear end of the seat surface portion 73 are provided.

  Latch openings 76 and 77 (the latch opening 77 of the latch mounting bracket 72) for allowing the latch 111 to be exposed to the center portion in the left-right direction of the latch mounting portion 71 and the seat surface portion 73 of the latch mounting bracket 72. Are provided so as to correspond to each other. Further, bolt insertion holes 78 and 79 shown in FIG. 5 are formed on the left and right sides of the latch opening 76 in the latch mounting portion 71 and on the left and right sides of the latch opening 77 in the seat surface portion 73 of the latch mounting bracket 72. One by one is provided to correspond. Further, one rivet insertion hole 80, 81 corresponds to each other on the front and rear sides of each bolt insertion hole 78 in the latch mounting portion 71 and on both front and rear sides of each bolt insertion hole 79 in the latch mounting bracket 72. It is provided one by one.

  An annular insertion portion 82 that is inserted into the bolt insertion hole 78 of the latch attachment portion 71 protrudes downward from the peripheral edge portion of the bolt insertion hole 79 of the latch attachment bracket 72. The latch mounting bracket 72 is positioned below the rivet insertion hole 80 of the latch mounting portion 71 and the rivet insertion hole 81 of the latch mounting bracket 72 in a state where the insertion portion 82 is inserted into the bolt insertion hole 78 of the latch mounting portion 71. The blind rivet 83 is inserted through the rivet 83, and the tip end side of the rivet 83 is fastened to the seat surface portion 73 of the latch mounting bracket 72, so that the rivet 83 is attached to the inner panel 7.

  The latch 111 has brackets 111 a protruding sideways on both the left and right sides, and these brackets 111 a and the latch mounting bracket 72 are fastened to the latch mounting portion 71 with bolts 84, and are attached to the inner panel 7. Specifically, the latch 111 inserts the latch 111 into both latch openings 77 of the latch mounting portion 71 and the latch mounting bracket 72 attached thereto, and the pair of brackets 111a is attached to the seat of the latch mounting bracket 72. In this state, the bolt 84 is inserted into the bolt insertion holes 78 and 79 of the latch mounting portion 71 and the latch mounting bracket 72 from below, and the tip end side of the bolt 84 is attached to the bracket 111a of the latch 111. By being fastened to the bolt insertion hole 112 formed in the above, it is attached to the latch mounting bracket 72 and fixed to the latch mounting portion 71.

  The extending portion 75 of the latch mounting bracket 72 extends to the front side of the plate mounting portion 37, that is, to the inner space S side (back side) of the mounting portion 37. That is, the upper end portion of the extending portion 75 is located on the inner space S side of the plate mounting portion 37 and faces the mounting surface portion 37a. A portion of the extending portion 75 facing the mounting surface portion 37 a of the plate mounting portion 37 includes a fixing surface portion 85 having an adhesive groove 85 a provided with the rear side recessed forward, and an upper end of the fixing surface portion 85. Further, a positioning piece 86 extending upward is provided. The fixing surface portion 85 of the latch mounting bracket 72 is disposed along the mounting surface portion 37a of the plate mounting portion 37, and is adhered to the mounting surface portion 37a with an elastic adhesive 29 such as a urethane-based adhesive.

  The positioning piece 86 is formed in a small piece shape having a portion extending from the upper end of the fixed surface portion 85 to the front side, and is disposed along the fastener fastening portion 65. The positioning piece 86 has a positioning hole 87 corresponding to the positioning hole 68 of the fastener fastening portion 65. Then, the positioning piece 86 is inserted into the positioning hole 87 and the positioning hole 68 of the fastener fastening portion 65 from the front, and the distal end side of the rivet 88 is fastened to the positioning piece 86, so that It is attached to the fastening part 65. As a result, the extending portion 75 of the latch mounting bracket 72 is positioned at the fastener fastening portion 65.

  In addition, an opening 89 having a size that does not greatly impair the strength of the latch mounting bracket 72 is formed in a portion of the extending portion 75 of the latch mounting bracket 72 below the fixed surface portion 85. As a result, the weight of the latch mounting bracket 72 is reduced.

  A latch accommodating portion 90 as an engaging device accommodating portion, which is a portion for accommodating the latch 111, is provided above the latch attaching portion 71 to which the latch attaching bracket 72 is attached in the inner panel 7. The latch housing portion 90 is surrounded by an upper standing wall 65 a that extends obliquely downward toward the front side below the fastener fastening portion 65, a pair of reinforcing ribs 69, and the outer standing wall 15 that constitutes the latch mounting portion 71. And formed in a concave shape opened to the rear side.

  The latch accommodating portion 90 is formed with a working opening 91 for performing the work of installing the latch 111 from the upper standing wall 65a to a part of the bottom wall portion 90a continuous to the lower side. The recesses formed on the front side of the inner panel 7 by the interior part attachment portion 51 and the fastener fastening portion 65 including the work opening 91 are closed by the cover panel 92.

  And in the internal space S in the lower part 3b of the door main body 3, as shown in FIG.2 and FIG.3, the rectangular-shaped reinforcement sheet-like object 93 is provided in the state expanded in the vehicle width direction. The reinforcing sheet 93 is a net-like member made of a knotless network having a number of meshes 94 such as a rectangle, a rhombus, or a hexagon. The mesh size of the mesh 94 is, for example, about 1.0 mm to 20.0 mm, and is appropriate depending on the flowability of the adhesives 29 and 95 used for bonding the reinforcing sheet 93 and the adhesive holding strength after curing. A large size is selected. The reinforcing sheet 93 is formed by knitting a twisted yarn 93a made of a stretchable fiber such as polyester, polyethylene, rubber, or nylon, and has stretchability in multiple directions such as up, down, left, and right.

  The reinforcing sheet 93 is arranged in substantially the entire region of the lower portion 3b of the door body 3, specifically, the entire central portion excluding the side end portions on the left and right sides of the lower portion 3b. It is bonded to the outer lower panel 9b at both portions along the upper edge and the lower edge, and is stretched in the vertical direction in the internal space S of the lower portion 3b.

  The upper edge part which is a part along the upper edge of the lower part 3b among the reinforcement sheet-like objects 93 is a part along the upper edge adhesion part 30a of the lower part 3b in the outer lower panel 9b as shown in FIG. Bonded with an elastic adhesive 95 such as urethane adhesive. Moreover, the lower edge part which is a part along the lower edge of the lower part 3b among the reinforcement sheet-like objects 93 was adjacent to the lower edge adhesion part 30b of the lower part 3b in the outer lower panel 9b as shown in FIG. The part is bonded with an elastic adhesive 95 such as urethane adhesive. As a result, at the time of a rear collision of the vehicle, the adhesion portion of the reinforcing sheet 93 is left together with the upper edge bonding portion 30a and the lower edge bonding portion 30b of the lower portion 3b, and the reinforcement sheet 93 is widened in the vehicle width direction. It can be maintained in the state.

  The adhesive 95 that bonds the upper and lower edges of the reinforcing sheet-like material 93 wraps the adhesive portion of the reinforcing sheet-like material 93 from the inner panel 7 side, and adheres to the outer lower panel 9b through the mesh 94 of the reinforcing sheet-like material 93. doing. Thereby, the adhesive strength of the upper and lower edges of the reinforcing sheet-like material 93 to the outer lower panel 9b is compared with the case where the adhesive portion of the reinforcing sheet-like material 93 is overlapped with the adhesive previously applied to the outer lower panel 9b. Has been enhanced.

  Further, as shown in FIG. 5, the reinforcing sheet-like object 93 is sandwiched between the fixing surface portion 85 of the latch mounting bracket 72 and the mounting surface portion 37 a of the plate mounting portion 37 and is adhered to both. That is, the reinforcing sheet 93 is bonded to the mounting surface 37 a of the plate mounting portion 37 by the adhesive 29 as well as the fixing surface portion 85 of the latch mounting bracket 72. As described above, the fixing surface portion 85 of the latch mounting bracket 72 is fixed to the mounting surface portion 37 a with the adhesive 29 with the reinforcing sheet-like material 93 sandwiched between the mounting surface portion 37 a of the plate mounting portion 37.

  An adhesive 29 that bonds the fixing surface portion 85 of the latch mounting bracket 72 to the mounting surface portion 37 a of the plate mounting portion 37 is filled in the bonding groove 85 a of the fixing surface portion 85. The adhesive portion corresponding to the adhesive groove 85a in the reinforcing sheet-like material 93 is wrapped with the adhesive 29 from the fixing surface portion 85 side, and the plate attachment portion is in the same adhesive state as the upper and lower edges of the reinforcing sheet-like material 93. 37 is attached to the mounting surface portion 37a. Thereby, the adhesive strength of the reinforcing sheet-like object 93 to the plate attaching part 37 is increased, and the reinforcing sheet-like object 93 is strongly fixed to the plate attaching part 37. Thus, the latch mounting bracket 72 holds the middle portion of the reinforcing sheet 93 in the vertical direction firmly to the mounting surface portion 37 a of the plate mounting portion 37 with the fixed surface portion 85.

  As shown in FIGS. 4 and 5, in the adhesive 95 that bonds the upper and lower edges of the reinforcing sheet 93 to the surface opposite to the outer lower panel 9 b that is an adherend, the reinforcing sheet 93. The masking sheet 97 used when adhering is left as it is. Further, as shown in FIGS. 2 and 3, the reinforcing sheet 93 has an opening 98 for passing wiring (not shown) for supplying power to a lamp for license plate illumination and an output shaft of the wiper device 109. A hole 99 for passing 109b is formed.

  In order to assemble the back door 1 having the above configuration, it is necessary to attach a pair of side reinforcing brackets 45 to the inner panel 7 before assembling the outer upper panel 9 a to the inner panel 7. Further, before the outer lower panel 9b is assembled to the inner panel 7, it is necessary to attach the latch mounting bracket 72 to the inner panel 7 and attach the reinforcing sheet-like material 93 to the outer lower panel 9b.

  Below, the operation | work which attaches the reinforcement sheet-like object 93 to the outer lower panel 9b is demonstrated, referring FIG. 6 (a), (b). FIG. 6A is a cross-sectional view showing the application process of the adhesive 95. FIG. 6B is a cross-sectional view showing the pressing process of the adhesive 95.

  In order to attach the reinforcing sheet member 93 to the outer lower panel 9b, first, the reinforcing sheet member 93 is placed on the surface of the outer lower panel 9b facing the inner panel 7, and the reinforcing sheet member 93 is placed on the outer lower panel 9b. In step 1, the position is aligned with a predetermined position. At this time, the upper edge portion of the reinforcing sheet-like material 93 is disposed at a position along the planned adhesion portion with the inner panel 7 in the upper edge portion of the outer panel 9b. Moreover, the lower edge part of the reinforcement sheet-like object 93 is arrange | positioned in the position adjacent to the said part along the adhesion plan part with the inner panel 7 in the lower edge part of the same panel 9b among the outer lower panels 9b.

  Next, with respect to the portion where the upper and lower edges of the reinforcing sheet 93 are arranged in the portion of the outer lower panel 9b along the portion scheduled to be bonded to the inner panel 7 at both the upper and lower edges, FIG. As shown, the adhesive 95 is applied so as to cover the adhesive portion of the upper and lower edges of the reinforcing sheet 93 by discharging the adhesive 95 from the nozzle 201 while scanning the nozzle 201 of the bonding apparatus. To do.

  Subsequently, as shown in FIG. 6B, the adhesive 95 is pressed against the reinforcing sheet 93 side, that is, the outer lower panel 9 b side, with the pressing roller 203 through the masking sheet 97. As a result, the portion of the reinforcing sheet-like material 93 to which the adhesive 95 is applied fills the mesh 94 and reaches the outer lower panel 9b through the mesh 94. The twisted yarn 93a that constitutes the bonding portion of the edge portion is buried in the adhesive 95.

  Thereafter, by curing (drying) the adhesive 95, the upper and lower edges of the reinforcing sheet 93 are bonded to the outer lower panel 9b.

  Next, an operation of assembling the back door 1 by assembling the outer upper panel 9a and the outer lower panel 9b to the inner panel 7 is performed. Below, the operation | work which assembles the outer lower panel 9b to the inner panel 7 is demonstrated, referring FIG. 7 (a), (b). FIG. 7A is a cross-sectional view showing the application process of the adhesive 29. FIG. 7B is a cross-sectional view showing a bonding process between the inner panel 7 and the outer lower panel 9b.

  In order to assemble the outer lower panel 9b to the inner panel 7, first of all, the bonding device to the outer lower panel 9b of the outer flange 17 and the inner flange 21 of the inner panel 7 is bonded to the outer panel 9b as shown in FIG. The adhesive 29 is applied by discharging the adhesive 29 from the nozzle 201 while scanning the nozzle 205. At this time, the adhesive 29 is similarly applied to the adhesive groove 85a of the latch mounting bracket 72 attached to the outer lower panel 9b.

  Next, the outer lower panel 9b is positioned and overlapped with the lower half portion of the inner panel 7 by inserting the positioning convex portion 23 into the positioning hole 35 of the protruding piece 33, and as shown in FIG. Of the outer flange 17 and the inner flange 21, the portion to which the adhesive 29 is applied is pressed by the pressing jig 207. At this time, the reinforcing sheet-like material 93 overlaps the fixing surface portion 85 of the latch mounting bracket 72 via the adhesive 29, and the adhesive 29 is filled into the mesh 94 of the reinforcing sheet-like material 93 by pressing with the pressing jig 207. Then, it reaches the outer lower panel 9 b through the mesh 94, and the portion of the reinforcing sheet 93 corresponding to the adhesive groove 85 a of the latch mounting bracket 72 is buried in the adhesive 29.

  Thereafter, the adhesive 29 is cured (dried), whereby the outer flange 17 and the inner flange 21 of the inner panel 7 and the fixing surface portion 85 of the latch mounting bracket 72 are bonded to the outer lower panel 9b. In this way, the outer lower panel 9b can be assembled to the inner panel 7.

  Further, the outer upper panel 9a is assembled to the inner panel 7 in the same procedure as the outer lower panel 9b. That is, an adhesive is applied to a portion of the outer flange 17 and the inner flange 21 of the inner panel 7 to be bonded to the outer upper panel 9a, and then the outer upper panel 9a is overlaid on the upper end portion of the inner panel 7. The outer upper panel 9a is bonded to the portion of the outer flange 17 and the inner flange 21 of the inner panel 7 where the adhesive is applied.

  Thereafter, an adhesive 39 is applied to the stepped portions 27 and 31 of the outer upper panel 9a and the outer lower panel 9b bonded to the inner panel 7 and the portion to be bonded to the window panel 5 in the outer flange 17 of the inner panel 7. Apply. Then, the window panel 5 is fitted between the step portions 27 and 31, and the outer upper panel 9 a and the outer lower panel 9 b are bonded to the window panel 5 with an adhesive 39.

  Finally, the latch 111 is inserted into the internal space S of the door body 3 from the work opening 91 of the inner panel 7, and the latch 111 is fixed to the latch mounting bracket 72 with the bolt 65. Further, after the wiper device 109 and the license plate illumination lamp are attached to the interior part attachment portion 51 of the door body 3, the cover panel 92 is attached to the front side of the door body 3.

  Through the above operations, the back door 1 shown in FIG. 1 can be assembled. Note that the bonding operation of the window panel 5 can be performed together with the bonding operation of the outer upper panel 9a and the outer lower panel 9b and the inner panel 7 by previously applying the adhesive 39 to the window panel 5 side.

-Effect of Embodiment 1-
FIG. 8 is a cross-sectional view illustrating an example of the state of the lower portion 3b at the time of a rear surface collision of the back door 1. According to the first embodiment, the reinforcing sheet-like material 93 is spread in the vehicle width direction by adhering the reinforcing sheet-like material 93 to the outer lower panel 9b having higher toughness than the inner panel 7 in the inner space S in the lower portion 3b of the door body 3. The latch mounting bracket 72 used for mounting the latch 111 to the inner panel 7 is provided with an extending portion 75 extending upward, and between the extending portion 75 and the plate mounting portion 37. Since the reinforcing sheet 93 is sandwiched between the two and fixed to each other with the adhesive 29, as shown in FIG. 8, the portion of the inner panel 7 along the lower edge bonding portion 30b of the lower portion 3b is damaged. Even so, the reinforcing sheet 93 is secured by the latch mounting bracket 72. Since the latch mounting bracket 72 fixes a middle portion in the vertical direction of the reinforcing sheet-like material 93 to the plate attaching portion 37, the holding effect of the reinforcing sheet-like material 93 is high. This prevents the reinforcing sheet-like object 93 from being separated from the inner panel 7 as well as the outer lower panel 9b, and prevents the inner space S of the lower portion 3b from being completely opened outside the vehicle without the reinforcing sheet-like object 93. In addition, since the reinforcing sheet 93 has stretchability, even if the lower portion 3b of the door body 3 is greatly deformed, it is stretched according to the deformation and can withstand an impact at the time of a rear-end collision of the vehicle. It is hard to do. Therefore, even if the panels 7 and 9b constituting the lower portion 3b of the door body 3 are scattered at the time of a rear-end collision of the vehicle, the reinforcing sheet 93 is left at a position corresponding to the panel scattering portion of the lower portion 3b. Therefore, it is possible to prevent a large hole from being opened in the lower portion 93.

  Further, according to the first embodiment, the extended portion 75 of the latch mounting bracket 72 is fixed to the outer lower panel 9b on the back side (inside the internal space S) of the plate mounting portion 37, so that the latch mounting of the outer lower panel 9b is performed. Even if distortion occurs due to adhesion at the fixing portion of the extension portion 75 of the bracket 72, it can be hidden by the number plate 107. Accordingly, the design of the back door 1 is not impaired due to the bonding of the extending portion 75 of the latch mounting bracket 72 to the outer lower panel 9b.

<< Embodiment 2 of the Invention >>
The vehicular back door 1 according to the second embodiment includes a rivet in which the wiper device mounting bracket 52 and the latch mounting bracket 72 are connected, and the fixing surface portion 85 of the latch mounting bracket 72 is replaced with the adhesive 29. It differs from the said Embodiment 1 in the point which was made to fix to the plate attaching part 37 by 131. FIG. In the present embodiment, only the wiper device mounting bracket 52 and the latch mounting bracket 72 having different configurations and the portions related to the brackets 52 and 72 in the door body 3 will be described, and the same components are shown in FIGS. The detailed description of the first embodiment based on FIG. 8 will be omitted.

  FIG. 9 is a perspective view showing the lower part 3b of the back door 1 and its periphery in the rear part of the vehicle body to which the back door 1 according to the second embodiment is attached. FIG. 10 is an exploded perspective view of the back door 1 according to the second embodiment. FIG. 11 is a cross-sectional view of the back door 1 taken along line XI-XI in FIG. In the back door 1 of the present embodiment, as shown in FIG. 10, the positioning convex portion 120 is located rearward instead of the positioning hole 68 between the pair of plate mounting bosses 66 in the fastener fastening portion 65 of the inner panel 7. It is provided to protrude.

  The wiper device mounting bracket 52 includes an upper surface portion 52a, a rear surface portion 52b and a lower surface portion 52c similar to those of the first embodiment, and an extending portion 52d extending downward from the front end of the lower surface portion 52c and extending along the fastener fastening portion 65. Have. An opening 121 is formed in a portion from the lower surface portion 52c of the wiper device mounting bracket 52 to the extending portion 52d so as not to block the lamp opening 62. The extending portion 52d of the wiper device mounting bracket 52 is provided with a positioning piece 52e extending inward from the lower end edge of the opening 121.

  The positioning piece 52e of the wiper device mounting bracket 52 is formed in a small piece shape having a portion extending forward from the lower end edge of the opening 121 of the extension portion 52d of the wiper device mounting bracket 52, and extends along the fastener fastening portion 65. Is arranged. The positioning piece 52 e has a positioning hole 123, and the positioning convex portion 120 of the fastener fastening portion 65 is inserted into the positioning hole 123. As a result, the extending portion 52 d of the wiper device mounting bracket 52 is positioned at the fastener fastening portion 65.

  Further, the positioning convex portion 120 of the fastener fastening portion 65 is also inserted into the positioning hole 87 of the positioning piece 86 in the latch mounting bracket 72. As a result, the extending portion 75 of the latch mounting bracket 72 is positioned on the fastener fastening portion 65. Thus, the extended portion 75 of the latch mounting bracket 72 and the extended portion 52d of the wiper device mounting bracket 52 are positioned together by being positioned by the positioning convex portion 120.

  Furthermore, a pair of connecting holes 125 and 127 are provided on the left and right sides of the lower end portion of the extending portion 52d of the wiper device mounting bracket 52 and the fixing surface portion 85 of the latch mounting bracket 72 so as to correspond to each other. That is, the fixing surface portion 85 of the latch mounting bracket 72 has a pair of connecting holes 127 instead of the adhesive grooves 85a. The wiper device mounting bracket 52 and the latch mounting bracket 72 allow the blind rivet 131 to be inserted from the rear into the mounting holes 129 provided in the portions corresponding to the connecting holes 125 and 127 of the mounting surface portion 37a of the plate mounting portion 37. The rivet 131 is fastened to the extending portion 52d of the wiper device mounting bracket 52 by fastening the tip end side thereof, and is connected to each other and between the extending portion 75 of the latch mounting bracket 72 and the plate mounting portion 37. 93 is sandwiched and fixed to the mounting surface portion 37 a of the plate mounting portion 37.

-Effect of Embodiment 2-
FIG. 12 is a cross-sectional view illustrating an example of the state of the lower portion 3b at the time of a rear collision of the back door 1 according to the second embodiment. Also in the second embodiment, since the reinforcing sheet-like object 93 is sandwiched and fixed between the extension portion 75 of the latch mounting bracket 72 and the plate mounting portion 37, as shown in FIG. Even if the portion along the lower edge bonding portion 30b of the lower portion 3b is damaged, the reinforcing sheet 93 is held by the latch mounting bracket 72, and the same effect as in the first embodiment can be obtained.

  Further, according to the second embodiment, the extension portion 75 of the latch mounting bracket 72 is fixed to the outer lower panel 9b by the rivet 131 on the back side of the plate mounting portion 37, so that the latch mounting bracket 72 of the outer lower panel 9b is fixed. Even if the rivet 131 is present at the fixed portion of the extending portion 75, it can be hidden by the number plate 107, and the design of the back door 1 is not impaired.

  Further, according to the second embodiment, since the wiper device mounting bracket 52 is connected to the latch mounting bracket 72, the wiper device 109 is released from the back door 1 by the impact at the time of rear collision of the vehicle. Can be prevented.

  In the first and second embodiments, the reinforcing sheet-like object 93 is a net-like member made of a rectangular no-joint net. However, the present invention is not limited to this, and the reinforcing sheet-like article 93 is made of a nodule net. It does not matter. The reinforcing sheet-like product 93 may be a knitted fabric or a woven fabric made of stretchable fibers, and may be formed in other shapes such as a trapezoidal shape. The reinforcing sheet 93 preferably has stretchability in multiple directions, but can be adopted as long as it has stretchability in at least one direction.

  In the first and second embodiments, the outer upper panel 9a and the adhesive 29 for bonding the outer lower panel 9b and the inner panel 7 and the adhesive 95 for bonding the reinforcing sheet 93 to the outer lower panel 9b are elastic adhesives. However, the present invention is not limited to this, and an adhesive other than an elastic adhesive such as an epoxy-based adhesive can be used as the adhesives 29 and 95. The same applies to the adhesive 39 that bonds the window panel 5 to the outer upper panel 9a, the outer lower panel 9b, and the inner panel 7.

  In the first and second embodiments, the latch 111 is attached to the inner panel 7 of the door body 3 and the striker 113 that engages with the latch 111 is provided on the vehicle body 101 as an example. Not limited to this, the striker 113 may be attached to the inner panel 7 of the door body 3, and the body 111 may be provided with a latch 111 that engages with the striker 113. In this case, the striker mounting bracket (engagement device mounting bracket) for mounting the striker 113 to the inner panel 7 has an extending portion 75 that extends upward and is located on the inner space S side of the plate mounting portion 37. The extension portion 75 may be fixed to the attachment surface portion 37a of the plate attachment portion 37 with a reinforcing sheet-like material 93 sandwiched between the extension portion 75 and the plate attachment portion 37 with a fastener such as a rivet or an adhesive.

  In the second embodiment, the wiper device mounting bracket 52 is provided separately from the latch mounting bracket 72 and connected to the latch mounting bracket 72. However, the present invention is not limited to this. The latch mounting bracket 72 may be provided integrally. That is, the wiper device mounting bracket 52 and the latch mounting bracket 72 may be a single member. Even with such a configuration, it is possible to prevent the wiper device 109 from flying off the back door 1 due to an impact at the time of a rear-end collision of the vehicle.

  In Embodiments 1 and 2 described above, the outer panel 9 is exemplified by two divided bodies of the outer upper panel 9a and the outer lower panel 9b. However, the present invention is not limited to this. It may be composed of a single panel. In this case, for example, the outer panel 9 has a configuration in which a middle panel in which a window opening is formed between the outer upper panel 9a and the outer lower panel 9b is provided, and these three members are integrally molded. Manufactured.

  As described above, the present invention is useful for a vehicle back door. In particular, even when the inner panel and the outer panel constituting the lower portion of the door main body are scattered at the time of a rear collision of the vehicle, the lower portion It is suitable for a vehicle back door that is required to prevent the opening of a large hole.

S Internal space 1 Back door 3 Door body 3a Upper portion 3b Lower portion 6 Window portion 7 Inner panel 9 Outer panel 37 Plate mounting portion 52 Wiper device mounting bracket 72 Latch mounting bracket (engaging device mounting bracket)
75 Extension part 93 Reinforcing sheet-like object 101 Car body body 103 Back door opening 107 Number plate 109 Wiper device 111 Latch (engagement device)

Claims (2)

The door body is made by bonding the resin inner panel (7) and the resin outer panel (9) so that they face each other, and an internal space (S) is provided between these two panels (7, 9). (3)
The door body (3) includes an upper portion (3a) that constitutes an upper portion and is provided with a window portion (6), and a lower portion (3b) that is positioned below the upper portion (3a). And
The lower edge of the opening (103) provided at the rear end of the vehicle body (101) on the inner space (S) side of the inner panel (7) along the lower edge of the lower part (3b) A metal engagement device mounting bracket (72) for attaching an engagement device (111) that is detachably engaged with the part is attached,
A hinge that is fixed to the upper edge of the opening (103) of the vehicle body (101) is attached to a portion of the upper part (3a) that is located above the window (6). A vehicle back door capable of opening and closing the opening (103) of the vehicle body (101) by rotating in the vertical direction as a center,
The toughness of the outer panel (9) is higher than the toughness of the inner panel (7),
The portion constituting the lower portion (3b) of the outer panel (9) has a plate attachment portion (37) to which the number plate (107) is attached in the middle in the vertical direction,
In the inner space (S) in the lower part (3b) of the door body (3), at least both parts along the upper and lower edges of the lower part (3b) in a state of being widened in the vehicle width direction. A reinforcing sheet-like material (93) having stretchability adhered to the outer panel (9),
The engagement device mounting bracket (72) has an extending portion (75) extending upward and positioned on the inner space (S) side of the plate mounting portion (37),
The extension portion (75) is fixed to the plate attachment portion (37) by sandwiching the reinforcing sheet-like material (93) between the extension portion (75) and the plate attachment portion (37). back door. In the vehicle back door according to claim 1,
A wiper device (109) for wiping the window (6) of the door body (3) on the inner space (S) side of a portion of the inner panel (7) located above the plate mounting portion (37). ) To attach the wiper device mounting bracket (52)
The wiper device mounting bracket (52) is provided integrally with the engaging device mounting bracket (72) or is provided separately from the engaging device mounting bracket (72). 72) A vehicle back door characterized by being connected to the vehicle.

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