JP6150696B2 - Vehicle back door - Google Patents

Description

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

  Patent Document 1 includes a door main body formed by joining a resin inner panel and a resin outer panel and having an internal space between the two panels, and a window portion is provided in the upper half of the door main body. A vehicle back door is disclosed. This back door has a reinforcement bracket (reinforce) as a rigid member that reinforces the inner panel at the left and right side edges from the upper half to a part of the lower half of the inner panel. A latch device (lock reinforcement) that engages with the provided striker is attached.

  And in this back door, in order to prevent scattering of the panel which constitutes the door body due to breakage at the time of a rear-end collision of the vehicle, an upper end portion is formed in the inner space of the lower portion located below the window portion in the door body. Is connected to the reinforcing bracket, and a wire having a lower end connected to the latch device is installed along the outer peripheral edge of the inner panel.

JP 2010-159037 A

  However, in the back door of Patent Document 1, although both ends of the wire are connected to the vehicle body via the reinforcing bracket and the latch device, the wires remain on the inner panel and the outer panel except for these both ends. And it is constructed along the outer-periphery edge part of an inner panel. For this reason, since the panel which comprises the part at the center part in the lower part of a door main body may fly at the time of the rear surface collision of a vehicle, it is desired to take a countermeasure against panel scattering.

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

  In order to achieve the above object, according to the present invention, a pair of holding members extending in the vehicle width direction along the upper and lower edges of the lower part are provided in the inner space of the lower part of the door body, The holding member is connected to the vehicle body through a rigid member attached to the door body, and the reinforcing sheet-like material is lowered by fixing the upper and lower edges of the reinforcing sheet-like material having stretchability to the pair of holding members. In the internal space of the part, it is stretched in the vertical direction and held in a state of being expanded in the vehicle width direction.

  Specifically, the present invention includes a door body that is formed by joining a resin inner panel and a resin outer panel so as to face each other, and has an internal space between the two panels. The following solution is taken for a vehicle back door having a window in a half portion.

  That is, according to the first aspect of the present invention, the first rigid member connected to the vehicle body is attached at least in the middle in the vertical direction at both end portions in the vehicle width direction of the surface of the inner panel facing the outer panel. The 2nd rigid member engaged with a vehicle body is attached to the lower end part among the surfaces of the outer panel facing side. In the internal space of the lower portion located below the window portion of the door body, an upper holding member extending in the vehicle width direction is used as the first rigid member at a location along the upper edge of the lower portion. Each is provided in a connected state. On the other hand, a lower holding member extending in the vehicle width direction is provided in a position along the lower edge of the lower portion in the internal space in the lower portion of the door body in a state of being connected to the second rigid member. Furthermore, a reinforcing sheet-like material made of stretchable fibers is provided in a state of being expanded in the vehicle width direction between the upper holding member and the lower holding member in the inner space in the lower portion of the door body. ing. In the first invention, the upper edge of the reinforcing sheet is fixed to the upper holding member, and the lower edge of the reinforcing sheet is fixed to the lower holding member. It is characterized by being held by these upper holding member and lower holding member and stretched in the vertical direction.

  According to a second aspect of the present invention, in the vehicular back door according to the first aspect of the present invention, a wiper device is attached to the portion of the inner panel corresponding to the upper holding member from the front of the vehicle body. The second invention is characterized in that the wiper device is connected to the upper holding member.

  According to a third aspect of the present invention, in the vehicle back door of the first or second aspect, the upper and lower edges of the lower portion of the door body are bonded to each other with an adhesive having rubber elasticity between the inner panel and the outer panel. It is the structure which is the made elastic adhesive part. According to a third aspect of the present invention, the upper edge portion of the reinforcing sheet-like material is sandwiched with an adhesive between the upper holding member and the outer panel, and the elastic adhesive portion at the upper edge portion of the lower portion of the outer panel. It is also bonded to a portion on the inner space side along. Further, according to a third aspect of the present invention, the lower edge portion of the reinforcing sheet-like material is sandwiched with an adhesive between the lower holding member and the outer panel, and elastic bonding at the lower edge portion of the lower portion of the outer panel is performed. It is also characterized by being bonded to a portion on the inner space side along the portion.

  According to a fourth invention, in the vehicle back door of the third invention, the upper holding member and the lower holding member are supported by a plurality of ribs protruding from the inner panel so as to be spaced apart from each other in the vehicle width direction. It is characterized by.

  According to a fifth invention, in the vehicle back door of the third or fourth invention, the reinforcing sheet-like material is a net-like member having a number of meshes. The adhesive that bonds the upper edge of the reinforcing sheet to the outer panel wraps around the edge of the reinforcing sheet from the inner panel side and adheres to the outer panel through the mesh of the reinforcing sheet. It also adheres to the upper holding member. In the fifth aspect of the invention, the upper edge portion of the reinforcing sheet-like material is bonded to the upper holding member with the adhesive, that is, the adhesive that bonds the upper edge portion of the reinforcing sheet-like material to the outer panel. It is characterized by. The adhesive that adheres the lower edge of the reinforcing sheet to the outer panel wraps the lower edge of the reinforcing sheet from the inner panel side and adheres to the outer panel through the mesh of the reinforcing sheet. The lower holding member is also attached. In the fifth invention, the lower edge portion of the reinforcing sheet-like material is also bonded to the lower holding member with the adhesive, that is, the adhesive that adheres the lower edge portion of the reinforcing sheet-like material to the outer panel. It is characterized by that.

  According to the first invention, the upper holding member extending in the vehicle width direction along the upper edge of the lower portion is provided in the inner space of the lower portion of the door body, and both end portions of the upper holding member are connected to the inner panel. Since the upper holding member is connected to the vehicle body via both first rigid members, the upper holding member is connected to the first rigid member attached to both side end portions of the vehicle at the time of rear collision of the vehicle. It is difficult to come off the door body due to an impact, and it can be maintained in a state of being arranged along the upper edge of the lower part. In addition, a lower holding member extending in the vehicle width direction along the lower edge of the lower portion is provided in the inner space in the lower portion of the door body, and the lower holding member is attached to the inner panel. Since it is connected to the rigid body and connected to the vehicle body via the second rigid member, the lower holding member is also difficult to come off from the door body due to the impact in the event of a rear-end collision of the vehicle. It can be maintained in a state of being arranged along.

  And according to 1st invention, the reinforcement sheet-like thing was provided in the state which extended in the vehicle width direction in the internal space in the lower part of a door main body, and the upper and lower edges of this reinforcement sheet-like thing were mentioned above in the door main body. The upper and lower holding members that are difficult to come off are fixed to each other, so that even if the inner panel and the outer panel constituting the lower part of the door body are scattered, the reinforcing sheet-like material spread in the vehicle width direction It can be left in the lower part while being stretched up and down. Since this 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 an impact at the time of rear-end collision of the vehicle, and is difficult to tear. Therefore, even if both panels constituting the lower part of the door body are scattered at the time of the rear collision of the vehicle, a reinforcing sheet-like material can be left in the part corresponding to the lower part of the back door. It can prevent a large hole from opening.

  According to the second invention, the wiper device is connected to the upper holding member connected to the vehicle body via the first rigid member. Even if the attachment location of the wiper device in the panel is not scattered, the wiper device is held by the upper holding member. Thereby, it is possible to prevent the wiper device from being hit by an impact at the time of a vehicle collision.

  According to the third aspect of the present invention, the upper and lower edges of the lower part of the door body are elastic adhesive parts in which the inner panel and the outer panel are bonded with an adhesive having rubber elasticity. In the event of a collision, the stress generated in the door body due to the impact is partially absorbed by this elastic bonding portion, and the elastic bonding portion of the door main body and the outer panel portion along the elastic bonding portion of the outer panel are scattered. It can be left as a door body. And the upper edge part and lower edge part of the reinforcing sheet-like material can be left without being scattered at the time of the rear collision of the vehicle in the door body, that is, the part along the elastic adhesive of the outer panel. Since it is made to adhere, the reinforcing sheet is fixed to the door main body in addition to the upper holding member and the lower holding member, and is firmly held by the pair of holding members and the door main body. Thus, even when both panels constituting the lower portion of the door body are scattered at the time of a rear collision of the vehicle, the lower portion of the door body is in a suitable state before the vehicle collision with the reinforcing sheet-like material spread in the vehicle width direction. Can be left in.

  Further, according to the third invention, the upper edge portion of the reinforcing sheet-like material is between the upper holding member and the outer panel, and the lower edge portion of the reinforcing sheet member is between the lower holding member and the outer panel. Since the upper and lower edges of these reinforcing sheet-like materials are bonded to the outer panel with an adhesive, the adhesive sheet is bonded to the outer panel by joining the inner panel and the outer panel. It is possible to simplify the adhesion work of the reinforcing sheet.

  According to the fourth invention, since the upper holding member and the lower holding member are supported by the plurality of ribs protruding from the inner panel, the two holding members are bonded together when the inner panel and the outer panel are joined. The upper and lower edges of the reinforcing sheet-like material can be stably bonded to the portion of the outer panel along the inner space side of the outer panel while applying as uniform pressure as possible.

  According to the fifth invention, the upper and lower edges of the reinforcing sheet-like material, which is a net-like member, are respectively wrapped with the adhesive from the inner panel side, and this adhesive is attached to the outer panel through the mesh of the reinforcing sheet-like material. By adhering to the outer panel, the adhesive is also attached to the upper holding member or the lower holding member corresponding to the edge of the reinforcing sheet-like material so that the two adhesive members are adhered and fixed. Since the reinforcing sheet-like material is a woven or knitted fabric having no gaps or holes such as a mesh through which the adhesive passes, and the upper and lower edges of the reinforcing sheet-like material are separately coated on the upper holding member. Or compared with the case where it adheres to a lower side holding member and an outer panel, respectively, the reinforcement sheet-like thing with respect to these upper side holding members and a lower side holding member, and an outer panel On capable of increasing the wear strength, it is possible to simplify the bonding operation of the coating of the adhesive requires less amount corresponding reinforcing sheet.

FIG. 1 is a perspective view showing a rear part of a vehicle body to which a vehicle back door according to an embodiment of the present invention is attached. FIG. 2 is an exploded perspective view of the vehicle back door according to the embodiment of the present invention. FIG. 3 is a front view showing a surface of the inner panel according to the embodiment of the present invention on the outer panel facing side. FIG. 4 is a cross-sectional view of the back door taken along the line IV-IV in FIG. FIG. 5 is a cross-sectional view of the back door taken along line V-V in FIG. 6 is a cross-sectional view of the back door taken along the line VI-VI in FIG. FIGS. 7A and 7B are process diagrams showing the assembly operation of the back door body according to the embodiment of the present invention. FIG. 8 is a cross-sectional view illustrating an example of a state corresponding to the lower portion at the time of a rear collision of the vehicle back door according to the 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 this specification, for convenience of explanation, the front side in the vehicle longitudinal direction is referred to as “front”, the rear side is referred to as “rear”, the left side in the vehicle width direction is referred to as “left”, and the right side is referred to as “right”. The upper side in the direction is called “upper” and the lower side is called “lower”.

  FIG. 1 is a perspective view showing a rear portion of a vehicle body 101 to which a vehicle back door 1 according to this embodiment is attached. As shown in FIG. 1, the back door 1 is for opening and closing a back door opening 103 provided in a rear portion of a vehicle body 101 of a hatchback vehicle. A blinker (rear lamp) 105 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 body. In the back door 1 according to the present embodiment, in order to expose these turn signals 105 to the rear of the vehicle body 101, 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 reinforcement bracket 43 on the right side is shown in a pair of side reinforcement brackets 43 described later, and the illustration of the side reinforcement bracket 43 on the left side is omitted. As shown in FIG. 2, the back door 1 includes a door body 3 made of a resin panel, and a resin or glass window panel 5 held in the upper half of the door body 3. 1 has a structure in which a window portion 6 (see FIG. 1) capable of daylighting is provided in a corresponding portion of the window panel 5. The door body 3 is formed by joining 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) to face each other. 7 and 9 has an internal space S (shown in FIG. 4 to be referred to later).

  The inner panel 7 is a single resin molded product formed by injection molding or the like, and for example, glass fiber-containing polypropylene (PP-GF; Polypropylene Glass Fiber) or carbon fiber-containing polypropylene (PP-CF; Polypropylene Carbon). It is made of a thermoplastic resin containing a fiber reinforcing material such as Fiber. On the other hand, the outer panel 9 is divided into an upper part and an outer upper panel 9a located on the upper side and an outer lower panel 9b located on the lower side. As will be described in detail later, 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 resin molded products molded by injection molding or the like. Propylene-Diene-Monomer). Accordingly, the rigidity of the inner panel 7 is higher than the rigidity of the outer upper panel 9a and the outer lower panel 9b, while the toughness of the outer upper panel 9a and the outer lower panel 9b is higher than the toughness of the inner panel 7. .

  FIG. 3 is a front view showing a surface of the inner panel 7 facing the outer panel 9, that is, a surface of the vehicle rear side. 4 is a cross-sectional view of the back door 1 corresponding to the line IV-IV in FIG. FIG. 5 is a cross-sectional view of the back door 1 corresponding to the line VV in FIG. 6 is a cross-sectional view of the back door 1 corresponding to the line VI-VI in FIG. As shown in FIGS. 3 to 6, the inner panel 7 includes a main body 11 that faces the outer panel 9 in the front-rear direction. In the main body 11, the upper half portion 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 is directed downward along the outer shape of the blinkers 105 on both left and right sides. 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.

  Further, an outer standing wall 15 that rises toward the outer panel 9 (rear side of the vehicle) is integrally projected from the outer peripheral edge of the main body 11 of the inner panel 7 over the entire circumference. An outer flange 17 for joining is integrally provided at the protruding end of the outer standing wall 15 so as to project outward. The outer flange 17 is formed over the entire circumference of the outer standing wall 15.

  Further, an inner standing wall 19 that rises toward the outer panel 9 (rear side of the vehicle) is integrally provided over the entire periphery of the inner panel 7 around the window opening 13 of the main body 11. An inner flange 21 for joining is integrally provided at the protruding end of the inner standing wall 19 so as to project inward of the window opening 13. The inner flange 21 is formed over the entire circumference of the inner standing wall 19.

  As shown in FIG. 2, the outer upper panel 9 a of the outer panel 9 is formed in a strip shape elongated in the vehicle width direction (left-right direction). The outer upper panel 9 a is opposed to a portion above the window opening 13 of the inner panel 7 and constitutes an upper portion 3 a of the door body 3. At the lower edge of the outer upper panel 9a, a step 23 that is recessed forward is provided over the entire vehicle width direction. 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 side portions 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 of 21 with an adhesive (not shown).

  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 is opposed to a portion below the window opening 13 of the inner panel 7 and constitutes a lower portion 3 b of the door body 3. On the upper edge portion of the outer lower panel 9b, a step portion 25 recessed forward is formed over the entire vehicle width direction. As shown in FIGS. 4 to 6, the outer peripheral edge portion of the outer lower panel 9 b is the outer peripheral edge portion of the inner panel 7, that is, the lower half portion and the lower side portion on the left and right side portions of the outer flange 17, and the window An adhesive 27 is attached to the lower edge of the opening 13, that is, the lower edge of the inner flange 21. A number plate mounting portion 29 is provided at the center of the outer lower panel 9b so as to be recessed forward.

  As shown in FIG. 2, 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. The window panel 5 is fitted between a step portion 23 at the lower edge portion of the outer upper panel 9a and a step portion 25 at the upper edge portion 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 23 and 25 with the adhesive agent 31 from back (refer FIG.4 and FIG.5). 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 (not shown).

  A region corresponding to the window opening 13 in the window panel 5 is a transparent window region 5a, and an outer region 5b is a concealment region 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. A through hole 33 is formed at the center position in the vehicle width direction of the lower edge portion of the window panel 5.

  The adhesive 27 that bonds 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 27 becomes a rubber-like elastic body when cured, and disperses the internal pressure from the adherend and absorbs external stress such as vibration and impact. As a result, the outer upper panel 9a and the portion where the outer lower panel 9b and the inner panel 7 are bonded, including the upper and lower edges of the lower portion 3b, of the door body 3 are shown in FIGS. As described above, the panels 7, 9a, 9b are overlapped to be a relatively thick and relatively strong portion of the door body 3 as compared with other portions, and the panels 7, 9a, 9b are The elastic bonding portion 35 is bonded with the elastic adhesive 27.

  The elastic bonding portion 35 partially absorbs the stress generated in the door main body 3 due to the impact at the time of rear collision of the vehicle. As a result, the elastic bonding portion 35 and the outer upper panel 9a portion and the outer lower panel 9b portion along the elastic bonding portion 35 of the door main body 3 are suppressed from being completely broken and hardly scattered. The adhesive 31 for bonding the inner panel 7, the outer upper panel 9a and the outer lower panel 9b to the window panel 5 is also an elastic adhesive, and the part where these panels 5, 7, 9a, 9b are bonded is also elastically bonded. Part 36 is formed. As the elastic adhesives 27 and 31, for example, urethane adhesives can be employed.

  Of the surface of the inner panel 7 facing the outer panel 9, the upper edge located above the window opening 13, specifically, the portion between the main body 11 and the outer standing wall 15 at the upper edge. As shown in FIGS. 2 and 3, a pair of left and right hinge mounting portions 37 that are recessed toward the front and project rearward are provided on the outer sides in the vehicle width direction and spaced apart from each other. Each of the pair of hinge mounting portions 37 has two hinge mounting holes 38 arranged side by side.

  Further, a damper penetrating the outer standing wall 15 is located at a lower position of both end portions in the vehicle width direction in the upper half of the inner panel 7, that is, in the middle in the vertical direction of both end portions in the vehicle width direction of the inner panel 7. Each mounting hole 39 is formed. Further, of the upper half portion of the main body 11 of the inner panel 7, the portion extending from the left hinge mounting portion 37 to the left damper mounting hole 39 corresponding portion and the right hinge mounting portion 37 corresponding to the right damper mounting hole 39. A plurality of bracket mounting bosses 40 project from the portion extending from each other at intervals. Each bracket mounting boss 40 has a mounting hole 42 into which a fastener 41 such as a bolt or a rivet is inserted and mounted.

  And in the side part in the vehicle width direction of the upper half part of the surface of the inner panel 7 facing the outer panel 9, that is, in the part from the middle in the vertical direction of the side edge part in the vehicle width direction of the same surface to the upper end. Are substantially L-shaped side reinforcing brackets 43 made of a metal plate such as steel attached to the damper 107 for opening and closing the back door 1, and are attached one by one as a first rigid member that reinforces the inner panel 7. Yes. A mounting surface portion 45 having an insertion hole 44 through which the fastener 41 is inserted is formed at a position corresponding to each bracket mounting boss 40 in the side reinforcing bracket 43.

  The side reinforcing bracket 43 is attached to the inner panel 7 by inserting the fastener 41 inserted through the insertion hole 44 of each of the attachment surface portions 45 into the attachment hole 42 of the bracket attachment boss 40 corresponding to the insertion hole 44. ing. An extension 43a extending to the outer periphery of the lower corner portion of the window opening 13 is provided at the lower end of the side reinforcing bracket 43. The extension 43a is connected to an upper holding member 79 described later. For this purpose, a connecting hole 46 is formed.

  Further, at the upper end portion of the side reinforcing bracket 43, a mounting reinforcing portion 47 which is recessed forward and protrudes rearward so as to correspond to the outer shape of the hinge mounting portion 37 is provided at a position corresponding to the hinge mounting portion 37 of the inner panel 7. Is provided. In the attachment reinforcing portion 47, hinge attachment holes 48 are formed at locations corresponding to the hinge attachment holes 38 of the inner panel 7. Each hinge mounting portion 37 of the inner panel 7 has a hinge (not shown) that is fixed to the upper edge portion of the back door opening 103 along the rotation axis in the vehicle width direction. The bolts 49 are inserted into the holes and the hinge mounting holes 38 and 48 of the inner panel 7 and the side reinforcing bracket 43 corresponding to the holes, so that they are attached from the front. Moreover, the side reinforcement bracket 43 is connected with the hinge by the attachment reinforcement part 47 by that, and is connected with the vehicle body 101 via the hinge.

  A damper mounting hole 50 is formed at a position corresponding to the damper mounting hole 39 of the inner panel 7 in the lower end side portion of the side reinforcing bracket 43. In the portion of the inner panel 7 where the damper mounting hole 39 is formed, the lower end of the damper 107 is provided with a mounting hole (not shown) provided in the lower end of the damper 107, the corresponding inner panel 7 and the side. It is attached by inserting bolts 51 into the damper mounting holes 39 and 50 of the reinforcing bracket 43. Moreover, the lower end side part of the side reinforcement bracket 43 is connected with the lower end of the damper 107 by that. The upper end of the damper 107 is fixed at a position closer to the upper part on both the left and right sides in the back door opening 103 of the vehicle body 101. Thus, each side reinforcing bracket 43 is connected to the vehicle body 101 via the damper 107.

  The pair of dampers 107 are cylinder-type stays in which gas is sealed, and are extendable in the longitudinal direction, and are urged so as to always expand by the pressure of the gas. The back door 1 is configured to open and close the back door opening 103 by pivoting up and down about a hinge as a fulcrum. The opening operation of each of the dampers 107 is assisted by the extension operation of each of the dampers 107. It is attached to the vehicle body 101 so as to prevent a sudden opening / closing operation by the expansion / contraction sliding resistance.

  A pair of central reinforcements extending parallel to each other in the vertical direction are provided at the center in the vehicle width direction of the lower half portion of the surface of the inner panel 7 facing the outer panel 9 below the window opening 13. The ribs 53 protrude in the left-right direction at intervals. The upper ends of the central reinforcing ribs 53 are integrally connected to the lower side portion of the inner standing wall 19. The lower ends of the central reinforcing ribs 53 are integrally connected to the lower side portion of the outer standing wall 15.

  A plurality of lightening holes 54 are formed on the base end side of each central reinforcing rib 53. The plurality of lightening holes 54 penetrate in the thickness direction of the central reinforcing rib 53 and are arranged at intervals along the length direction of the rib 53. A relatively thin fragile portion 55 is provided between adjacent hollow holes 54 in each central reinforcing rib 53. The thickness of the fragile portion 55 is a thickness that can be broken when the body portion 11 of the inner panel 7 is subjected to a large impact that is deformed or scattered during a rear-end collision of the vehicle. By providing such a weak part 55, it can suppress that a sink mark arises in the site | part corresponding to the center reinforcement rib 53 among the inner panels 7, and can prevent that the external appearance of the panel 7 is impaired.

  Furthermore, between the pair of central reinforcing ribs 53, a pair of connecting portions 57 extending in parallel to each other in the left-right direction are provided so as to protrude in the vertical direction, and the pair of central reinforcing ribs 53 are connected to each of the connecting portions. 57 are connected. The pair of central reinforcing ribs 53 and the pair of connecting portions 57 have a ladder shape as a whole when viewed from the front. The connection part 57 located on the lower side of the pair of connection parts 57 constitutes a light attachment part 58 to which a light for license plate illumination (not shown) is attached.

  A latch 59 is attached between the pair of central reinforcing ribs 53 at the lower end of the portion of the inner panel 7 that is positioned below the light attachment portion 58, that is, the surface of the inner panel 7 that faces the outer panel 9. A latch mounting portion 61 is provided. The latch 59 detachably engages with a striker 109 provided at the lower edge of the back door opening 103, and constitutes a lock device that cooperates with the striker 109 to lock the back door 1 to the vehicle body 101 in a closed state. Is. In the middle of the latch mounting portion 61 in the vehicle width direction, a latch opening 62 for allowing the latch 59 to face the outside is formed. The latch opening 62 is formed from the lower side portion of the outer standing wall 15 to the main body portion 11 in the vicinity thereof.

  One insertion hole 64 through which the bolt 63 is inserted is formed in a portion of the lower side portion of the outer standing wall 15 located on the left and right sides of the latch opening 62. A latch mounting bracket 65 for mounting the latch 59 to the inner panel 7 is mounted on the latch mounting portion 61 as a peripheral portion of the latch opening 62, that is, as a second rigid member that reinforces the latch mounting portion 61. ing. The latch 59 is attached to the inner panel 7 via the latch mounting bracket 65. That is, the latch mounting bracket 65 is engaged with the vehicle body 101 via the latch 59.

  The latch mounting bracket 65 is formed by press-molding a metal plate such as a steel plate, and has a U-shaped longitudinal section that opens rearward. Specifically, the latch mounting bracket 65 includes a lower plate portion 65 a that contacts the outer standing wall 15 and a front plate portion that is bent upward from the front end of the lower plate portion 65 a and contacts the main body portion 11 of the inner panel 7. 65b and an upper plate portion 65c that is bent backward from the upper end of the front plate portion 65b and faces the lower plate portion 65a. A pair of left and right insertion holes 66 through which the bolts 67 are inserted are formed in the upper plate portion 65 c of the latch mounting bracket 65.

  An opening 68 for receiving the latch 59 is formed from the lower plate portion 65a to the front plate portion 65b at a location corresponding to the latch opening 62 of the inner panel 7 in the latch mounting bracket 65. Insertion holes 69 through which the bolts 63 are inserted are respectively formed at positions corresponding to the insertion holes 64 of the outer standing wall 15 on both the left and right sides of the opening 68 in the lower plate portion 65a. The latch mounting bracket 65 has a bolt 63 inserted through the insertion holes 64 and 69 of the latch mounting bracket 65 and the outer standing wall 15 from the outside, and a base front end side of the bolt 63 is connected to the lower plate portion 65a of the bracket 65. It is attached to the latch attaching portion 61 by being fastened to the weld nut 71 fixed to the head.

  In addition, a wiper mounting portion 82 that is recessed forward and protrudes rearward is formed in a portion along the lower edge portion of the window opening 13 between the pair of central reinforcing ribs 53 in the inner panel 7. The wiper mounting portion 82 is formed with a pair of left and right insertion holes 83 through which the bolts 87 are inserted. As shown in FIGS. 2 and 5, a wiper device 84 for wiping the outer surface of the window panel 5 is attached to the wiper attachment portion 82 from the front.

  The wiper device 84 includes a motor unit 85 attached to the front side of the inner panel 7 and a wiper (not shown) attached to the output shaft 85a of the motor unit 85. The output shaft 85 a of the motor unit 85 protrudes outside the vehicle through a through hole 33 formed in the window panel 5, and the wiper is disposed on the vehicle outside of the window panel 5.

  The lower end portion of the motor portion 85 of the wiper device 84 is in contact with the wiper mounting portion 82 from the front, and has a pair of left and right plate-like brackets 86 protruding to both sides. In the pair of brackets 86, insertion holes 88 through which the bolts 87 are inserted are formed at positions corresponding to the respective insertion holes 83 of the wiper mounting portion 82.

  A plurality of upper support ribs 73 project substantially over the entire surface of the inner panel 7 facing the outer panel 9 along the lower edge of the window opening 13 at intervals in the vehicle width direction. It is installed. Each of the upper support ribs 73 protrudes toward the outer lower panel 9b and extends in the vertical direction, and is formed in a shape that narrows in the vertical direction as the tip end portion moves rearward. The upper ends of the upper support ribs 73 are integrally connected to the lower side portion of the inner standing wall 19. The front end of each upper support rib 73 is integrally connected to the main body 11 of the inner panel 7.

  One holding member mounting boss 75 projects from each of the left and right sides in the vehicle width direction of the row formed by the plurality of upper support ribs 73. The left holding member mounting boss 75 is disposed at a position corresponding to the front side of the extending portion 43a of the left side reinforcing bracket 43 in the main body portion 11 of the inner panel 7, and the right holding member mounting boss 75 is formed on the inner panel. 7 is disposed at a position corresponding to the front side of the extending portion 43 a of the right side reinforcing bracket 43. Each of these holding member mounting bosses 75 has mounting holes 76 into which bolts 81 are inserted and mounted.

  Further, in the internal space S of the lower portion 3b of the door body 3, an upper holding member 79 extending in the vehicle width direction is attached to a location along the elastic bonding portion 35 at the upper edge of the lower portion 3b. Provided between the bosses 75 and supported by a plurality of upper support ribs 73. The upper holding member 79 is a rigid member made of a metal plate such as steel. The upper holding member 79 is an elongated strip plate-like rear plate portion 79 a that contacts the rear end surface of the upper support rib 73, and is bent forward from the lower end of the rear plate portion 79 a to contact the lower end surface of the upper support rib 73. And an elongated strip-like lower plate portion 79b. The wiper mounting portion 82 corresponds to the central portion of the upper holding member 79 in the vehicle width direction.

  Portions located at both ends of the rear plate portion 79a of the upper holding member 79 have insertion holes 80 through which the bolts 81 are inserted, corresponding to the extended portions 43a of the side reinforcing brackets 43 and the holding member mounting bosses 75. Then, the upper holding member 79 allows the bolts 81 inserted through the respective insertion holes 80 of the upper holding member 79 to be inserted into the connection holes 46 of the extension portions 43 a of the side reinforcing brackets 43 corresponding to the insertion holes 80. At the same time, the both end portions are attached to the corresponding side reinforcing brackets 43 by being inserted into the mounting holes 76 of the holding member mounting bosses 75 so as to be mounted on the inner panel 7. In this way, the upper holding member 79 is connected to the vehicle body 101 via the both side reinforcing brackets 43, so that it is difficult for the upper holding member 79 to be detached from the door body 3 due to the impact at the time of a rear collision of the vehicle. It is maintained in a state of being arranged along the elastic bonding portion 35 at the edge portion.

  Although not shown, the lower plate portion 79b of the upper holding member 79 includes a portion positioned on the left side of the pair of central reinforcing ribs 53, a portion positioned on the right side of the pair of central reinforcing ribs 53, and the pair of central reinforcing members. The central reinforcing rib 53 is divided into three parts between the ribs 53, and the central reinforcing rib 53 is inserted between adjacent parts of the three parts. As shown in FIG. 5, a connecting piece 79c that extends to the inner panel 7 side by the extension of the lower plate portion 79b and then bends downward to come into contact with the wiper mounting portion 82 is formed at the center portion of the lower plate portion 79b. Is provided. Insertion holes 78 through which the bolts 87 are inserted are formed at positions corresponding to the respective insertion holes 83 of the wiper mounting portion 82 in the connecting piece 79c.

  The wiper device 84 is connected to the connecting piece 79 c of the upper holding member 79. The wiper device 84 inserts the bolt 87 inserted through the insertion hole 88 of each bracket 86 from the front into the both insertion holes 78 and 83 of the connecting piece 79c in the wiper mounting portion 82 and the upper holding member 79. The base end side is fastened to a weld nut 89 fixed to the connecting piece 79 c of the upper holding member 79, and is attached to the wiper attaching portion 82 while being connected to the upper holding member 79.

  A plurality of lower support ribs 91 are provided on the lower edge portion of the surface of the inner panel 7 facing the outer panel 9, specifically, on the lower edge portion located on both sides of the pair of central reinforcing ribs 53. Are protruded over substantially the entire space at intervals in the vehicle width direction. Each lower support rib 91 protrudes toward the outer lower panel 9b and extends in the vertical direction, and is formed in a substantially trapezoidal shape in a side view. The lower ends of the lower support ribs 91 are integrally connected to the lower side portion of the outer standing wall 15. The front end of each lower support rib 91 is integrally connected to the main body 11 of the inner panel 7. One holding member mounting boss 70 is projected from each of the left and right sides in the vehicle width direction of the row formed by the plurality of lower support ribs 91. Each of these holding member mounting bosses 70 has mounting holes 72 into which bolts 74 are inserted and mounted.

  Further, in the internal space S of the lower portion 3b of the door body 3, a lower holding member 92 extending in the vehicle width direction is provided substantially along the elastic bonding portion 35 at the lower edge of the lower portion 3b. And is supported by a plurality of lower support ribs 91. The lower holding member 92 is a rigid member made of a metal plate material such as steel, like the upper holding member 79. The lower holding member 92 includes an elongated strip-like rear plate portion 92a that contacts the rear end surface of the lower support rib 91, and an upper end surface of the lower support rib 91 that is bent forward from the upper end of the rear plate portion 92a. And a band plate-like upper plate portion 92b that comes into contact with each other, and attachment portions 92f for attaching the lower holding member 92 to the inner panel 7 at both ends.

  Each mounting portion 92f of the lower holding member 92 corresponds to the holding member mounting boss 70, and is bent at a right angle so as to extend the lower holding member 92 after extending forward from the end of the rear plate portion 92a. It has an L-shaped transverse cross-sectional shape extending in the direction, and has an insertion hole 90 through which a bolt 74 is inserted in a portion extending in the lateral direction. The lower holding member 92 is fixed to the inner panel 7 by inserting the bolt 74 inserted into the insertion hole 90 of each attachment portion 92c into the attachment hole 72 of the holding member attachment boss 70 corresponding to the attachment portion 92c. ing.

  The upper plate portion 92b of the lower holding member 92 includes a portion 92c positioned on the left side of the pair of central reinforcing ribs 53, a portion 92d positioned on the right side of the pair of central reinforcing ribs 53, and the pair of central reinforcing ribs. The central reinforcing rib 53 is inserted between adjacent portions of the three portions. A central portion 92e of the upper plate portion 92b of the lower holding member 92 abuts on the upper plate portion 65c of the latch mounting bracket 65 from below, and corresponds to each insertion hole 66 of the upper plate portion 65c in the bracket 65. There is an insertion hole 93 through which the bolt 67 is inserted.

  The lower holding member 92 is connected to the insertion holes 66 and 93 of the center portion 92e and the upper plate portion 65c of the latch mounting bracket 65 of the upper plate portion 92b of the lower holding member 92. The bolt 67 is inserted from the upper side of the portion 65c, and the base end side of the bolt 67 is fastened to the weld nut 94 fixed to the center portion 92e of the upper plate portion 92b of the lower holding member 92. It is connected. In this way, the lower holding member 92 is connected to the vehicle body 101 via the latch mounting bracket 65 and the latch 59, so that it is difficult for the lower holding member 92 to be detached from the door body 3 due to the impact at the time of a rear collision of the vehicle. 3b is maintained along the lower edge.

  Further, in the internal space S in the lower portion 3b of the door body 3, a rectangular reinforcing sheet 95 is placed between the upper holding member 79 and the lower holding member 92 with the long side along the vehicle width direction. It is provided in a state of being expanded in the same direction. The reinforcing sheet-like object 95 is a net-like member made of a knotless network having a number of meshes 96 such as a rectangle, a rhombus, and a hexagon. The mesh size of the mesh 96 of the reinforcing sheet 95 is about 1.0 mm to 20.0 mm, and the flowability of the elastic adhesive 97, which will be described later, used for bonding the reinforcing sheet 95 and after curing. An appropriate size is selected depending on the adhesive holding strength.

  The reinforcing sheet 95 is formed by knitting a twisted yarn 95a 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. An opening 99 is formed in the central portion of the reinforcing sheet 95 to allow wiring (not shown) for supplying power to the lamp for license plate illumination.

  The upper edge portion of the reinforcing sheet 95 is bonded and fixed to the upper holding member 79 with an elastic adhesive 97 throughout the vehicle width direction. Further, the lower edge portion of the reinforcing sheet 95 is bonded and fixed to the lower holding member 92 with the elastic adhesive 97 over the whole in the vehicle width direction. As a result, the reinforcing sheet 95 is held by the upper holding member 79 and the lower holding member 92 and is stretched in the vertical direction, and substantially the entire lower portion 3b of the door body 3, that is, the lower portion 3b. It is arranged on the entire portion near the center except for the side end sides on both the left and right sides.

  The upper edge of the reinforcing sheet 95 is sandwiched between the upper holding member 79 and the outer lower panel 9b together with the elastic adhesive 97, and is bonded to the rear plate portion 79a of the upper holding member 79 with the elastic adhesive 97. In addition, the outer lower panel 9b is bonded to the inner space S side portion along the elastic bonding portion 35 at the upper edge portion of the lower portion 3b by the elastic adhesive 97. The elastic adhesive 97 that bonds the upper edge of the reinforcing sheet 95 wraps the upper edge of the reinforcing sheet 95 from the inner panel 7 side, and passes through the mesh 96 of the reinforcing sheet 95 to form the outer lower panel 9b. And also attached to the rear plate portion 79a of the upper holding member 79. Thus, the twisted yarn 95 a constituting the upper edge portion of the reinforcing sheet 95 is embedded in the elastic adhesive 97.

  In addition, the lower edge portion of the reinforcing sheet 95 is sandwiched between the lower holding member 92 and the outer lower panel 9b together with the elastic adhesive 97, and the elastic adhesive 97 is attached to the rear plate portion 92a of the lower holding member 92. In addition, the outer lower panel 9b is also bonded to a portion on the inner space S side along the elastic bonding portion 35 at the lower edge portion of the lower portion 3b by an elastic adhesive 97. The elastic adhesive 97 that adheres the lower edge of the reinforcing sheet 95 wraps the lower edge of the reinforcing sheet 95 from the inner panel 7 side, and passes through the mesh 96 of the reinforcing sheet 95 to form the outer lower panel 9b. And also attached to the rear plate portion 92a of the lower holding member 92. Thus, the twisted yarn 95a constituting the lower edge portion of the reinforcing sheet 95 is also embedded in the elastic adhesive 97.

  In this way, the upper and lower edges of the reinforcing sheet 95 that is a net-like member are bonded to the outer lower panel 9b by the elastic adhesive 97 adhering to the outer lower panel 9b through the mesh 96 of the reinforcing sheet 95. In addition, since the elastic adhesive 97 is also attached to the upper holding member 79 or the lower holding member 92 corresponding to the edge of the reinforcing sheet-like material 95, it is also bonded to the holding members 79 and 92, respectively. Therefore, the reinforcing sheet 95 is a woven or knitted fabric without a gap or hole such as a mesh through which the adhesive is passed, and the adhesive is applied to both the upper and lower edges of the reinforcing sheet 95 separately. Compared to the case where the outer lower panel 9b is bonded to the upper holding member 79 or the lower holding member 92, respectively, the upper holding member 79, the lower holding member 92 and the outer lower panel 9 are bonded. Can be simplified over that can increase the adhesive strength of the reinforcing sheet 95, the bonding work of the coating of the adhesive requires less amount corresponding reinforcing sheet 95 against and.

  Next, a method for assembling the back door 1 configured as described above will be described with reference to FIGS. 7 (a) and 7 (b). FIG. 7A is a cross-sectional view showing the application process of the elastic adhesives 27 and 97. FIG. 7B is a cross-sectional view showing a joining process between the inner panel 7 and the outer lower panel 9b.

  To assemble the back door 1, first, the side reinforcing brackets 43 are fastened to the plurality of bracket mounting bosses 40 with the fasteners 41 and attached to the inner panel 7. The upper holding member 79 is fastened to the holding member mounting boss 75 of the inner panel 7 with bolts 81 together with the extending portions 43a of the side reinforcing bracket 43, so that the upper holding member 79 is attached to the plurality of upper support ribs. It fixes to the state supported by 73, is attached to the inner panel 7, and is connected with both side reinforcement brackets 43.

  Further, the lower holding member 92 and the latch mounting bracket 65 are coupled by fastening the center portion 92e of the upper plate portion 92b of the lower holding member 92 to the upper plate portion 65c of the latch mounting bracket 65 with a bolt 67. Let Then, by fastening the attachment portions 92 f at both ends of the lower holding member 92 to the holding member attachment boss 70 of the inner panel 7 with bolts 74, the lower holding member 92 is attached to the plurality of lower support ribs 91. Fix in a supported state and attach to the inner panel 7. At this time, the latch mounting bracket 65 is disposed in the latch mounting portion 61.

  Note that at least the surfaces of the rear plate portions 79a and 92a of the upper holding member 79 and the lower holding member 92 are previously subjected to a surface treatment such as a primer treatment or a washing treatment in order to improve the adhesion with the adhesive 97. May be.

  Next, the reinforcing sheet member 95 is placed on the surface of the outer lower panel 9b facing the inner panel 7, and the reinforcing sheet member 95 is aligned at a predetermined position on the outer lower panel 9b. At this time, the upper edge portion of the reinforcing sheet-like material 95 is disposed on a portion of the outer lower panel 9b along the portion to be bonded to the inner panel 7 at the upper edge portion of the panel 9b. A lower edge part is arrange | positioned in the part along the adhesion plan part with the inner panel 7 in the lower edge part of the panel 9b among the outer lower panels 9b.

  Subsequently, in the outer lower panel 9b, the portions along the inner side of the portions to be bonded at the upper and lower edges, that is, the upper and lower edges of the reinforcing sheet 95, as shown in FIG. The elastic adhesive 97 is applied so as to cover the upper and lower edges of the reinforcing sheet 95 by discharging the elastic adhesive 97 from the nozzle 201 while scanning the nozzle 201. At this time, the elastic adhesive 27 is also applied to the portions to be bonded at the upper and lower edges of the outer lower panel 9b.

  Next, as shown in FIG. 11B, the left and right side portions and the lower side portions of the outer flange 17 in the lower half portion of the inner panel 7 and a part of the main body portion 11 located in the periphery thereof are shown. Then, the pressing jig 205 is bonded to the left and right side edge portions and the lower edge portion of the outer lower panel 9b by pressing them through the elastic adhesive 27, respectively. At the same time, the lower side portion of the inner flange 21 of the inner panel 7 is bonded to the upper edge portion of the outer lower panel 9b by pressing it through an elastic adhesive 27.

  At this time, the elastic adhesive 97 applied to the upper edge of the reinforcing sheet 95 is pressed against the outer lower panel 9b by the rear plate 79a of the upper holding member 79, and the reinforcing sheet 95b. The elastic adhesive 97 applied to the lower edge of the sheet 95 is pressed against the outer lower panel 9b together with the reinforcing sheet 95 by the rear plate portion 92a of the lower holding member 92. As a result, in the portion of the reinforcing sheet 95 to which the elastic adhesive 97 is applied, the elastic adhesive 97 is filled into the mesh 96 and reaches the outer lower panel 9b through the mesh 96. Twisted yarns 95 a constituting both upper and lower edges are embedded in the elastic adhesive 97.

  Further, the upper holding member 79 is supported from the inner panel 7 side by a plurality of upper support ribs 73, and the lower holding member 92 is supported from the inner panel 7 side by a plurality of lower support ribs 91. A substantially uniform pressure is applied to the elastic adhesive 97 pressed by the members 79 and 92. As a result, the upper and lower edges of the reinforcing sheet 95 can be stably bonded to the outer lower panel 9b. Thereafter, by curing (drying) the elastic adhesive 97, the upper and lower edges of the reinforcing sheet 95 are bonded to the upper holding member 79 or the lower holding member 92 corresponding to the edge and the outer lower panel 9b. At the same time, the inner panel 7 and the outer lower panel 9b are bonded together, and both the panels 7 and 9b are joined.

  Further, an elastic adhesive is applied to a portion to be bonded at the outer peripheral edge portion of the outer upper panel 9 a, and thereafter, the upper end portion and the upper and lower side portions of the left and right side portions of the outer flange 17 of the inner panel 7. By pressing the upper side portion against the outer peripheral edge portion of the outer upper panel 9a via an elastic adhesive, the inner panel 7 and the outer upper panel 9a are bonded to each other, and both the panels 7 and 9a are joined.

  Thereafter, the stepped portions 23 and 25 of the outer upper panel 9a and the outer lower panel 9b joined to the inner panel 7 are arranged on the left and right side portions of the outer flange 17 of the inner panel 7 facing the window panel 5, respectively. An elastic adhesive 31 is applied. Then, the window panel 5 is fitted between the step portions 23 and 25 and bonded to the outer upper panel 9a, the outer lower panel 9b, and the inner panel 7 via the elastic adhesive 31.

  Finally, by fastening the lower plate portion 65a of the latch mounting bracket 65 from the outside to the latch mounting portion 61 with a bolt 63, the latch mounting bracket 65 is attached to the latch mounting portion 61 and the latch 59 is attached to the latch mounting bracket 65. Fix it. Further, the output shaft 85a of the motor unit 85 of the wiper device 84 is projected to the outside of the vehicle through the through hole 33 of the window panel 5, and both brackets 86 of the motor unit 85 are fastened to the wiper mounting portion 82 of the inner panel 7 with bolts 87. Thus, after the motor unit 85 is attached to the wiper attachment portion 82, the wiper device 84 is configured by attaching the wiper to the output shaft 85a.

  Through the above operations, the back door 1 shown in FIG. 1 is 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 elastic adhesive 31 to the window panel 5 side. .

-Effect of the embodiment-
FIG. 8 is a cross-sectional view illustrating an example of the state of the portion corresponding to the lower portion 3 b at the time of a rear collision of the back door 1. In this embodiment, a reinforcing sheet 95 is provided in the inner space S of the lower portion 3b of the door body 3 in a state where the reinforcing sheet 95 is expanded in the vehicle width direction. The upper holding member 79 and the lower holding member 92, which are difficult to come off, are bonded to the upper holding member 92, and further, the portion of the door body 3 that can be left without being scattered at the time of a rear collision of the vehicle, that is, the elastic bonding portion of the outer lower panel 9b. Since the reinforcing sheet-like object 95 is firmly fixed by the upper holding member 79, the lower holding member 92, and the outer lower panel 9b by being adhered to the portion along the line 35, as shown in FIG. Even if both panels 7, 9b constituting the lower portion 3b of the door body 3, that is, not only the highly rigid inner panel 7 but also the tougher outer lower panel 9b are scattered. It can be left to the lower portion 3b in a state where the reinforcing sheet 95 spread in a vehicle width direction passed over in the vertical direction. Since the reinforcing sheet 95 has stretchability, even if the lower portion 3b of the door body 3 is greatly deformed, the reinforcement sheet 95 is stretched according to the deformation and can withstand an impact at the time of a rear-end collision of the vehicle. hard. Therefore, according to this embodiment, even if both 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 portion corresponding to the lower portion 3b in the back door 1 Since the reinforcing sheet-like object 95 can be left, it can be prevented that a large hole is opened at the same location.

  Further, according to this embodiment, since the wiper device 84 is connected to the upper holding member 79 connected to the vehicle body 101 via the both side reinforcing brackets 43, the inner panel 7 is affected by the impact at the time of rear collision of the vehicle. Even if the wiper mounting portion 82 of the panel 7 does not scatter due to damage, the wiper device 84 can be held by the upper holding member 79 and the device 84 can be prevented from being hit by an impact at the time of a vehicle collision.

  In the above-described embodiment, the reinforcing sheet-like material 95 is described as an example of a net-shaped member made of a knotless net formed in a rectangular shape. This member may consist of a knotted net. The reinforcing sheet 95 may be a knitted or woven fabric made of stretchable fibers, and may be formed in other shapes such as a trapezoid. The reinforcing sheet 95 is desirably stretchable in multiple directions, but can be employed as long as it has stretchability in at least one direction.

  In the above embodiment, the adhesive 97 that bonds the upper and lower edges of the reinforcing sheet 95 to the outer lower panel 9b or the like is an elastic adhesive. However, the adhesive 97 is not limited to this. Adhesives other than elastic adhesives such as epoxy adhesives can also be employed. The same applies to the adhesive 27 for bonding the outer upper panel 9a and the outer lower panel 9b to the inner panel 7, and the adhesive 31 for bonding the window panel 5 to these panels 7, 9a, 9b.

  Moreover, in the said embodiment, the side reinforcement bracket 43 was attached to the part from the up-down direction middle to the upper end of the both ends in the vehicle width direction among the surfaces of the inner panel 7 facing the outer panel 9. However, the present invention is not limited to this, and the side reinforcing brackets 43 may be respectively attached from the upper end to the entire lower end of both side ends in the vehicle width direction on the same surface, and in the vehicle width direction on the same surface. It suffices if it is attached at least in the middle in the up-down direction at both end portions.

  Moreover, in the said embodiment, although the outer panel 9 illustrated the form comprised by the two division body of the outer upper panel 9a and the outer lower panel 9b, it is not limited to this, The outer panel 9 is a single piece. It may consist of panels. In this case, the outer panel 9 has, for example, 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 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 a large hole from opening at a corresponding location.

S internal space 1 back door 3 door body 3a upper part 3b lower part 5 window panel 5a window area 5b outer area (hiding area)
6 Window part 7 Inner panel 9 Outer panel 9a Outer upper panel 9b Outer lower panel 13 Window opening 27 Elastic adhesive 35 Elastic adhesive part 43 Side reinforcement bracket (first rigid member)
65 Latch mounting bracket (2nd rigid member)
73 Upper support rib 79 Upper holding member 82 Wiper mounting portion 84 Wiper device 91 Lower support rib 92 Lower holding member 95 Reinforcing sheet-like material 96 Mesh 97 Elastic adhesive 101 Car body

Claims (5)

The resin inner panel (7) and the resin outer panel (9) are joined to each other so as to face each other, and a door body (3) having an internal space between the two panels (7, 9) is provided. A vehicle back door provided with a window (6) in the upper half of the door body (3),
A first rigid member (43) connected to the vehicle body (101) is provided at least in the middle in the vertical direction at both side ends in the vehicle width direction of the surface of the inner panel (7) facing the outer panel (9). A second rigid member (65) that engages with the vehicle body (101) is attached to the lower end of the surface of the inner panel (7) facing the outer panel (9),
In the internal space (S) of the lower part (3b) located below the window part (6) in the door body (3), in a location along the upper edge of the lower part (3b), An upper holding member (79) extending in the vehicle width direction is provided in a state where both ends are connected to the first rigid member (43), respectively, and a position along the lower edge of the lower portion (3b) A lower holding member (92) extending in the direction is provided in a state of being connected to the second rigid member (65), and an extension property is provided between the upper holding member (79) and the lower holding member (92). A reinforcing sheet-like material (95) made of fibers having a width is provided in a state of being expanded in the vehicle width direction,
The upper edge portion of the reinforcing sheet-like object (95) is fixed to the upper holding member (79), and the lower edge portion of the reinforcing sheet-like object (95) is fixed to the lower holding member (92). Accordingly, the vehicle back door is characterized in that the reinforcing sheet-like object (95) is held by the upper holding member (79) and the lower holding member (92) and is stretched in the vertical direction. In the vehicle back door according to claim 1,
A wiper device (84) is attached from the front of the vehicle body (101) to a portion of the inner panel (7) corresponding to the upper holding member (79).
The vehicular back door characterized in that the wiper device (84) is connected to the upper holding member (79). In the vehicle back door according to claim 1 or 2,
The upper and lower edges of the lower part (3b) have an elastic bonding part (35) in which the inner panel (7) and the outer panel (9) are bonded with a rubber elastic adhesive (27). And
An upper edge portion of the reinforcing sheet-like object (95) is sandwiched between the upper holding member (79) and the outer panel (9) together with an adhesive (97), and the outer panel (9) Adhered to the inner space (S) side part along the elastic bonding part (35) at the upper edge of the lower part (3b) with the adhesive (97),
The lower edge portion of the reinforcing sheet-like object (95) is sandwiched between the lower holding member (92) and the outer panel (9) together with an adhesive (97), so that the outer panel (9) Of these, the vehicle is characterized in that the adhesive (97) is also bonded to the inner space (S) side portion along the elastic bonding portion (35) at the lower edge portion of the lower portion (3b). back door. The vehicle back door according to claim 3,
The upper holding member (79) and the lower holding member (92) are supported by a plurality of ribs (73, 91) projecting from the inner panel (7) at intervals in the vehicle width direction. A vehicle back door characterized by that. In the vehicle back door according to claim 3 or 4,
The reinforcing sheet-like material (95) is a net-like member having a large number of meshes (96),
The adhesive (97) for adhering the upper edge of the reinforcing sheet-like material (95) to the outer panel (9) has the upper edge of the reinforcing sheet-like material (95) from the inner panel (7) side. Wrapping and adhering to the outer panel (9) through the mesh (96) and also adhering to the upper holding member (79), the upper edge of the reinforcing sheet (95) is the upper holding member (95) 79) with the adhesive (97),
The adhesive (97) for adhering the lower edge of the reinforcing sheet-like material (95) to the outer panel (9) has the lower edge of the reinforcing sheet-like material (95) from the inner panel (7) side. Wrapping and adhering to the outer panel (9) through the mesh (96), and also adhering to the lower holding member (92), the lower edge of the reinforcing sheet-like object (95) is held on the lower side A vehicular back door characterized by being adhered to the member (92) with the adhesive (97).

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