JP6166670B2 - 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 fixed to the panel using an attachment structure of the engaging device that engages with the vehicle body to the inner panel.

  Specifically, the present invention relates to a vehicular back door that can be 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 in a state of facing each other. Is targeted. 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. This door main body has an upper part that constitutes an upper part and is provided with a window part, and a lower part that is positioned below the window part. On the inner space side of the inner panel in the part along the lower edge of the lower part of the door body, it is detachable from the lower edge of the opening (hereinafter referred to as a back door opening) provided at the rear end of the vehicle body. A metal bracket for attaching an engaging device to be engaged is attached. The engagement device is, for example, a latch or striker that constitutes a lock device that locks the back door to the vehicle body. 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 capable of opening and closing the back door opening 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. Furthermore, the inner space in the lower part of the door body has a stretchability bonded to the outer panel at least at both parts along the upper and lower edges of the lower part in a state of being expanded in the vehicle width direction. One reinforcing sheet-like material is provided. The first invention is characterized in that the reinforcing sheet-like object is fixed by being sandwiched between the bracket for mounting the engaging device and the inner panel.

  According to a second aspect of the present invention, in the vehicular back door according to the first aspect of the present invention, the engagement device mounting portion, which is a portion of the inner panel where the bracket for mounting the engagement device is mounted, extends in the front-rear direction of the vehicle body. It has the composition which is. An engagement device housing portion corresponding to the upper side of the engagement device mounting portion of the inner panel and housing the engagement device is formed in a concave shape that is recessed forward of the vehicle body. The reinforcing sheet-like material has a pair of cuts extending in the vertical direction to the lower edge of the reinforcing sheet-like material at intervals in the vehicle width direction at a portion corresponding to the engaging device housing portion. And the 2nd invention arrange | positions in the state which the part located between these pair of cut | interruptions among the reinforcement sheet-like objects was folded in the engagement apparatus accommodating part along the shape of the engagement apparatus accommodating part. The engaging device mounting portion constitutes a folding piece fixed between the bracket for mounting the engaging device and the inner panel.

  According to a third aspect of the present invention, in the vehicle back door according to the second aspect of the present invention, the lower edge portion of the lower portion of the door body is a lower edge bonding portion in which the inner panel and the outer panel are bonded with an adhesive. . According to a third aspect of the present invention, the bonded portion along the lower edge of the lower portion of the reinforcing sheet-like material includes the lower end portion of the folded piece, and the lower edge bonded portion between the inner panel and the outer panel at the lower portion. Between the inner panel and the outer panel.

  According to a fourth aspect of the present invention, in the vehicular back door according to the first aspect of the present invention, an engagement device mounting portion, which is a portion of the inner panel to which the bracket for mounting the engagement device is mounted, extends in the front-rear direction of the vehicle body. It has the composition which is. According to a fourth aspect of the present invention, the inner panel is folded in a portion corresponding to the rear side of the vehicle body with respect to the engagement device mounting portion on the lower portion of the reinforcing sheet-like material and is partially overlapped. An extension piece having a folded portion fastened to the front and a fixed portion that extends from the folded portion to the front of the vehicle body and is fixed between the bracket for mounting the engagement device and the inner panel by the engagement device mounting portion. Is provided.

  According to a fifth invention, in the vehicle back door according to the fourth invention, the lower edge portion of the lower portion of the door body is a lower edge bonding portion in which the inner panel and the outer panel are bonded with an adhesive. . In the fifth aspect of the invention, the bonded portion along the lower edge of the lower portion of the reinforcing sheet-like material includes the folded portion of the extended piece, and the lower edge bonded portion of the lower portion is connected to the inner panel and the outer panel. It is characterized by being sandwiched between the inner panel and the outer panel by being sandwiched together with an adhesive.

  According to a sixth aspect of the present invention, in the vehicle back door according to any one of the first to fifth aspects, the upper edge of the lower portion of the door body is the upper edge where the inner panel and the outer panel are bonded with an adhesive. It has the structure which is an adhesion part. And the 6th invention is sandwiched with the adhesive between the inner panel and the outer panel at the upper edge adhesive part of the lower part of the adhesive part along the upper edge of the lower part of the reinforcing sheet-like material, It is characterized by being bonded to these inner panel and outer panel.

  According to a seventh aspect, in the vehicle back door according to any one of the third, fifth and sixth aspects, the reinforcing sheet is a net-like member having a number of meshes. According to a seventh aspect of the present invention, an adhesive for adhering the reinforcing sheet-like material to the inner panel and the outer panel wraps the adhesive portion of the reinforcing sheet-like material from the outer panel side, and passes the mesh of the reinforcing sheet-like material to the inner panel. It is adhering to.

  According to the first invention, the reinforcing sheet-like material is provided in the inner space in the lower portion of the door body in a state of being expanded in the vehicle width direction, and the reinforcing sheet-like material is provided on the upper edge and the lower edge of the lower portion. Adhering to the outer panel, which is tougher than the inner panel at both parts along, along with the bracket used for mounting to the inner panel of the engagement device that engages with the vehicle body, and the mounting part of this bracket among the inner panel Even if the portion of the inner panel along the bonded portion with the outer panel is damaged at the lower edge of the lower portion of the door body due to a rear-end collision of the vehicle, the reinforcing sheet is used. The shaped object is secured to the attachment position of the engagement device on the inner panel. 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.

  According to the second invention, even if the engaging device accommodating portion is formed in a concave shape recessed in front of the vehicle body, the folded piece disposed in the accommodating portion along the shape of the engaging device accommodating portion. Is provided between the bracket and the inner panel, so that the folded piece is fixed between the bracket for mounting the engaging device and the inner panel by the engaging device mounting portion. It is not necessary to fix the sandwiched object while folding or stretching the reinforcing sheet. Simply place the reinforcing sheet in a predetermined position and fold the folded piece into the engagement device housing. It is possible to easily perform the work of attaching the reinforcing sheet-like material to the inner panel.

  According to the third invention, the reinforcing sheet-like material is bonded to the inner panel and the outer panel at the lower edge bonding portion having a relatively high rigidity where the inner panel and the outer panel are bonded in the door body. The adhesion strength of the reinforcing sheet-like material to both the panels can be improved, and the adhesion portion of the reinforcing sheet-like material can be left together with the lower edge adhesion portion of the lower portion of the door body at the time of rear collision of the vehicle. Accordingly, the reinforcing sheet-like object can be maintained in the state of being widened in the vehicle width direction and can be left in the lower portion in that state.

  According to the fourth aspect of the present invention, the folded portion that is folded back in a state of being partially overlapped with the lower portion of the reinforcing sheet-like material, and the fixing portion that is fixed between the bracket for mounting the engaging device and the inner panel. Since the folded portion that is doubled is fastened to the inner panel, the strength of the portion of the inner panel where the folded portion is fastened can be suitably reinforced by the reinforcing sheet-like material. As a result, it is possible to make it difficult to damage the engagement device mounting portion at the time of a rear collision of the vehicle.

  According to the fifth aspect of the invention, the reinforcing sheet-like material is bonded to the inner panel and the outer panel at the lower edge bonding portion having a relatively high rigidity where the inner panel and the outer panel are bonded to each other in the door body. The adhesion strength of the reinforcing sheet-like material to the inner panel and the outer panel can be improved, and the adhesion portion of the reinforcing sheet-like material can be left together with the lower edge adhesion portion of the lower portion of the door body at the time of rear collision of the vehicle. Accordingly, the reinforcing sheet-like object can be maintained in the state of being widened in the vehicle width direction and can be left in the lower portion in that state.

  According to the sixth aspect of the invention, the reinforcing sheet-like material is bonded to the inner panel and the outer panel at the upper edge bonding portion having a relatively high rigidity where the inner panel and the outer panel are bonded to each other in the door body. The adhesion strength of the reinforcing sheet-like material to the inner panel and the outer panel can be improved, and the adhesion portion of the reinforcing sheet-like material can be left together with the upper edge adhesive portion of the lower portion of the door body at the time of rear collision of the vehicle. Accordingly, the reinforcing sheet-like object can be maintained in the state of being widened in the vehicle width direction and can be left in the lower portion in that state.

  According to the seventh invention, by wrapping the adhesive portion of the reinforcing sheet-like material which is a net-like member with an adhesive from the outer panel side, and attaching this adhesive to the inner panel through the mesh of the reinforcing sheet-like material, Since it is made to adhere to the inner panel and the outer panel, the reinforcing sheet-like material is a woven or knitted material having no gaps or holes such as a mesh through which the adhesive is passed, and both surfaces of the reinforcing sheet-like material are separately attached to each other. The adhesive strength of the reinforcing sheet-like material to the inner panel and the outer panel can be increased as compared with the case where the adhesive is applied to the inner panel and the outer panel. In addition, the bonding operation of the reinforcing sheet-like material can be simplified by the amount of application of the adhesive necessary for the bonding operation of the reinforcing sheet-like material to the inner panel and the outer panel.

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). 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 (a) and 6 (b) are views showing aspects of the reinforcing sheet-like material 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 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 internal view showing the surface of the inner panel facing the outer panel according to Embodiment 2 of the present invention together with the reinforcing sheet-like material (two-dot chain line). FIG. 11 is a view corresponding to FIG. 5 of the back door according to the second exemplary embodiment of the present invention. 12 (a) and 12 (b) are views showing aspects of a reinforcing sheet-like object according to Embodiment 2 of the present invention. FIGS. 13A and 13B are process diagrams showing the assembly work of the door body of the vehicle back door according to the second 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 each embodiment, 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 “right”. The upper side in the vehicle height direction is called “upper”, and the lower side is called “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 body 3 includes an upper portion 3 a that constitutes an upper portion and is provided with a window portion 6, and a lower portion 3 b that is positioned below the window portion 6. 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 object 81 (two-dot chain line) described later. 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. 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. In addition, a number plate attaching portion 37 to which a number plate (not shown) is attached is provided at the center portion of the outer lower panel 9b. The number plate mounting portion 37 is recessed forward from the periphery thereof, and is inclined to the front side upward.

  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 concealment 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 adhesive 29 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 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.

  That is, the outer upper panel 9 a and the outer lower panel 9 b and the inner panel 7 are bonded to the other portions of the door body 3 by the amount of the panels 7, 9 a and 9 b overlapped with the adhesive 29. Since it is relatively thick, it has a relatively high strength, and in addition, it partially absorbs the stress generated in the door body 3 due to the impact at the time of a rear collision of the vehicle. As a result, the part where these panels 7, 9a, 9b are bonded is prevented from being completely broken even during a rear-end collision of the vehicle, and is difficult to scatter.

  Further, the adhesive 39 for bonding the outer upper panel 9a and the outer lower panel 9b to the window panel 5 is also an elastic adhesive, and the bonded portions of both the panels 5, 9a, 9b also partially apply the stress generated in the door body 3. It is designed to absorb. As the 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. On the pair of hinge mounting portions 41, an opening / closing hinge (not shown) fixed to the upper edge portion of the back door opening 103 along the rotational axis in the vehicle width direction is mounted 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, the portion extending from the left hinge mounting portion 41 to the left damper mounting hole 43 corresponding portion and the right hinge mounting portion 41 corresponding to the right damper mounting hole 43. A plurality of bracket mounting bosses 44 are provided to protrude rearward at intervals from each other. Then, a substantially L-shaped side reinforcing bracket 45 made of a metal plate is attached to the inner panel 7 by being fastened to the plurality of bracket mounting bosses 44 with fasteners such as bolts and rivets from the rear.

  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 bolts.

  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. It is attached from the side by inserting a fastener such as a bolt into 49. 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 of the inner panel 7, an interior component mounting portion 51 to which a wiper device for wiping the outer surface of the window panel 5 and a license plate illumination lamp (both not shown) are mounted from the front. And a plate mounting portion 53 having a pair of left and right plate mounting bosses 52 for mounting the number plate is provided with the front side of the inner panel 7 recessed backward.

  The wiper device is attached to the interior component attachment portion 51 using an attachment bracket 50 that is a metal plate member, and the wiper is connected to the upper portion of the interior component attachment portion 51 and the holes 50a and 51a provided in the attachment bracket 50. The output shaft of the motor part of the apparatus is inserted into the internal space S, and is provided so as to protrude rearward from a wiper insertion hole 58 provided in the outer lower panel 9b. The lamp for illuminating the license plate is mounted so as to illuminate the lower part from the hole 54 provided in the lower part of the interior part mounting part 51.

  Further, a work opening 55 for performing a work for installing a latch 111 described later is formed on the inner panel 7 below the plate mounting portion 53. A recess formed on the front side of the inner panel 7 by the interior component mounting portion 51 and the plate mounting portion 53 and the work opening 55 is closed by a cover panel 57 (see FIG. 5).

  A pair of reinforcing ribs 59 extending in the vertical direction to the lower side of the outer standing wall 17 are provided on the left and right sides of the work opening 55 of the inner panel 7 so as to protrude rearward. Further, a latch 111 is attached between the pair of reinforcing ribs 59 at a portion along the lower edge portion of the lower portion 3b located below the work opening 55, that is, at the lower side portion of the outer standing wall 15 of the inner panel 7. A latch mounting portion 61 is provided as an engaging device mounting portion.

  A portion of the inner panel 7 corresponding to the upper side of the latch mounting portion 61 is provided with a latch housing portion 62 that houses the latch 111. The latch housing portion 62 is surrounded by the latch mounting portion 61, the lower wall 53a of the plate mounting portion 53, and a pair of reinforcing ribs 59, and is formed in a rectangular concave shape that is recessed forward. 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 mounting portion 61 extends in the front-rear direction, and a latch opening 63 for allowing the latch 111 to face the outside is formed in the middle in the vehicle width direction. One bolt insertion hole 67 through which the bolt 65 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 63. Further, as shown in FIG. 5, rivet insertion holes 69 through which blind rivets 76 are inserted are formed on both front and rear sides of the bolt insertion hole 67.

  A metal latch mounting bracket 71 for mounting the latch 111 to the inner panel 7 is provided on the surface on the inner space S side of the latch mounting portion 61, and the peripheral portion of the latch opening 63, that is, the latch mounting portion 61. It is attached as a rigid member to reinforce. The latch 111 is attached to the latch attachment portion 61 via the latch attachment bracket 71.

  The latch mounting bracket 71 has, for example, a shape in which a pair of edges forming opposite sides of a rectangular metal plate are bent upward. A portion of the latch mounting bracket 71 corresponding to the latch opening 63 of the inner panel 7 is formed with a latch opening 73 having the same size as the latch opening 63 of the inner panel 7 as shown in FIG. ing. Further, as shown in FIG. 5, in the latch mounting bracket 71, a bolt insertion hole 75 is provided in a portion corresponding to the bolt insertion hole 67 of the inner panel 7, and a portion corresponding to the rivet insertion hole 69 of the panel 7 is provided. Rivet insertion holes 79 are respectively provided.

  Further, an annular insertion portion 77 that is inserted into the bolt insertion hole 67 of the inner panel 7 is provided on the peripheral edge portion of the bolt insertion hole 75 of the latch mounting bracket 71 so as to protrude downward. The latch mounting bracket 71 is inserted into the rivet insertion hole 69 of the inner panel 7 and the rivet insertion hole 79 of the latch mounting bracket 71 in a state where the insertion portion 77 is inserted into the bolt insertion hole 75 of the inner panel 7. The blind rivet 76 is inserted from below the panel 7, and the tip end side of the rivet 76 is fastened to the latch mounting bracket 71, so that the rivet 76 is attached to the inner panel 7.

  The latch 111 has a bracket 112 protruding to the side, and the bracket 112 is fixed to the latch mounting bracket 71 with a bolt 65 and attached to the latch mounting portion 61. Specifically, the latch 111 inserts the bolt 65 from below the inner panel 7 into the bolt insertion hole 67 of the inner panel 7 and the bolt insertion hole 75 of the latch mounting bracket 71, and the bolt 65 is inserted into the bracket of the latch 111. By being fastened to a bolt fastening hole 112 a formed in 112, it is attached to the latch mounting bracket 71 and fixed to the latch mounting portion 61 of the inner panel 7.

  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 reinforcing sheet-like object 81 is provided in the state expanded in the vehicle width direction. The reinforcing sheet-like object 81 is a net-like member made of a knotless net having a large number of meshes 83 such as a rectangle, a rhombus, and a hexagon. The mesh of the mesh 83 is, for example, about 1.0 mm to 20.0 mm, and is appropriate depending on the flowability of the adhesives 29 and 85 used for bonding the reinforcing sheet 81 and the adhesive holding strength after curing. A large size is selected. The reinforcing sheet 81 is formed by knitting a twisted yarn 81a 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.

  FIG. 6A is a developed view of the reinforcing sheet-like object 81 as viewed from the rear side. FIG. 6B is a rear view showing a state in which the reinforcing sheet 81 is attached to the inner panel 7. In FIG. 6A, a fold line indicated by a broken line is a valley fold line, and a fold line indicated by an alternate long and short dash line is a mountain fold line. This is the same also in FIG. 13A referred later. As shown in FIGS. 6A and 6B, the reinforcing sheet-like object 81 is formed in a substantially convex shape having a folding piece 82 that protrudes downward in a deployed state at a portion corresponding to the latch accommodating portion 62. ing.

  Specifically, the reinforcing sheet-like member 81 has a pair of narrow cuts 84 extending in the vertical direction from the middle to the lower edge of the reinforcing sheet-like member 81 in a portion corresponding to the latch housing portion 62. Yes. The pair of cuts 84 are provided at intervals in the vehicle width direction at a portion corresponding to the space between the pair of reinforcing ribs 59 in the reinforcing sheet-like material 81. The left cut 84 extends along the reinforcing rib 59 on the right side of the left reinforcing rib 59, and the right cut 84 extends along the reinforcing rib 59 on the left side of the right reinforcing rib 59.

  And the part located between these pair of cut | interruptions 84 among the reinforcement sheet-like objects 81 comprises the tongue-shaped folding piece 82 extended long below rather than another part in the expansion | deployment state. As shown in FIG. 5, the folding piece 82 is arranged in a state of being folded in the latch accommodating portion 62 along the shape of the latch accommodating portion 62, and the latch mounting portion 61 is used to connect the latch mounting bracket 71 and the inner panel 7. It is fixed in between.

  As shown in FIG. 6A, an opening 85 for performing the installation work of the latch 111 is formed in a portion corresponding to the work opening 55 in the folded piece 62, and corresponds to the latch opening 63. An opening 86 for inserting the latch 111 is formed in the portion. The reinforcing sheet 81 is also formed with an opening 87 for passing wiring (not shown) for supplying power to the lamp for license plate illumination and a hole 89 for passing the output shaft of the wiper device. .

  The reinforcing sheet-like material 81 is fastened to the inner panel 7 at a plurality of locations by welding pins 91. On the lower side of the inner standing wall 19 of the inner panel 7 and on the left and right sides of the interior component mounting portion 51, the upper fastening ribs 93 shown in FIG. (Not shown) are provided at intervals in the vehicle width direction. The upper end of the upper retaining rib 93 is integrally connected to the inner standing wall 19, and the front end of the upper retaining rib 93 is integrally connected to the main body 11 of the inner panel 7. A portion near the upper edge of the reinforcing sheet 81 is fastened to the rear ends of these upper fastening ribs 93 by welding pins 91. And the upper edge part of the reinforcing sheet-like object 81 is extended to the upper edge adhesion part 30a of the lower part 3b.

  Further, in the lower side portion of the outer flange 17 of the inner panel 7, the lower portion located outside the inner panel 7 faces the outer lower panel 9b and constitutes an adhesive portion 17a bonded to the outer lower panel 9b. The bonding portion 17a constitutes a lower edge bonding portion 30b of the lower portion 3b. On the other hand, the upper portion located inside the inner panel 7 at the lower side of the outer flange 17 is inclined upward and constitutes an inclined portion 17b extending away from the outer lower panel 9b.

  A portion of the inclined portion 17b that does not correspond to the rear side of the latch mounting portion 61, that is, a portion that is located on the rear side of the left and right sides of the latch mounting portion 61 has a lower retaining rib 95 shown in FIG. A plurality of (not shown in FIG. 3) are provided at intervals in the vehicle width direction. A portion near the lower edge of the reinforcing sheet 81 is fastened to the rear ends of the lower fastening ribs 95 with welding pins 91. And the lower edge part of the reinforcement sheet-like object 81 is extended to the lower edge adhesion part 30b of the lower part 3b.

  Further, in the reinforcing sheet-like material 81, the folding piece 82 is fastened to the latch housing portion 62 at a plurality of locations by the welding pins 91, and the upper portion of the folding piece 82 is fastened to the plate attachment portion 53 by the welding pins 91. Further, as shown in FIG. 5, a positioning pin 97 is provided so as to protrude rearward in a portion of the inclined portion 17 b of the lower side portion of the outer flange 17 located behind the latch mounting portion 61. The lower end portion of the folded piece 82 of the reinforcing sheet 81 is positioned by inserting the positioning pins 97 through the mesh 83 and extends to the lower edge bonding portion 30b of the lower portion 3b.

  And this reinforcement sheet-like object 81 is arrange | positioned so that it may be arrange | positioned in the substantially whole area in the lower part 3b of the door main body 3, specifically, the whole center part except the side edge part of right and left both sides among the lower parts 3b. It adheres to the outer lower panel 9b at both portions along the upper edge and the lower edge of 3b, 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 reinforcing sheet-like objects 81 is the lower edge of the inner flange 21 of the inner panel 7 at the upper edge adhesive part 30a of the lower part 3b as shown in FIG. And the outer lower panel 9b are sandwiched together with the adhesive 29 and bonded to the panels 7 and 9b. Moreover, the lower edge part which is a part along the lower edge of the lower part 3b among the reinforcement sheet-like objects 81 contains the lower end part of the folding piece 82, and the outer edge of the inner panel 7 is the lower edge adhesive part 30b of the lower part 3b. It is sandwiched between the lower side portion of the flange 17 and the outer lower panel 9b together with the adhesive 29, and is bonded to both the panels 7 and 9b.

  The adhesive 29 that bonds the upper and lower edges of the reinforcing sheet-like material 81 wraps the adhesive portion of the reinforcing sheet-like material 81 from the outer lower panel 9b side, and passes through the mesh 83 of the reinforcing sheet-like material 81 to the inner panel 7. It adheres to the outer flange 17 and the inner flange 21. As a result, the reinforcing sheet-like material 81 is a woven or knitted material having no gaps or holes such as the mesh 83 through which the adhesive 29 is passed, and is an adhesive in which both surfaces of the reinforcing sheet-like material 81 are separately applied. Compared with the case where it adheres to the flanges 17 and 21 of the inner panel 7 and the outer lower panel 9b, respectively, the adhesive strength of the reinforcing sheet member 81 to the inner panel 7 and the outer lower panel 9b can be increased.

  In order to assemble the back door 1 having the above-described 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 b to the inner panel 7. Further, before assembling the outer lower panel 9 b to the inner panel 7, it is necessary to attach the reinforcing sheet-like object 81 together with the latch mounting bracket 71 to the inner panel 7. Below, the attachment operation | work of the reinforcement sheet-like object 81 with respect to the inner panel 7 is demonstrated.

  In order to attach the reinforcing sheet member 81 to the inner panel 7, first, the reinforcing sheet member 81 is placed at a predetermined position on the surface of the inner panel 7 facing the outer lower panel 9 b. At this time, the portion near the lower end of the reinforcing sheet-like material 81 is hooked on the welding pin 91 provided on each lower fastening rib 95 and the folding piece 82 is latched along the shape of the latch accommodating portion 62. It folds in the accommodating part 62 and hooks on the welding pin 91 provided in the latch accommodating part 62 (refer Fig.7 (a)).

  Further, the upper portion of the folding piece 82 is hooked on the welding pin 91 provided on the plate mounting portion 53, and the portion near the lower end of the folding piece 82 is hooked on the positioning pin 97 provided on the inclined portion of the outer flange. The lower end portion of the folding piece 82 is overlapped with the bonding portion 17 a of the outer flange 17. Further, the portion near the upper edge of the reinforcing sheet 81 is hooked on the welding pin 91 provided on each upper fastening rib 93, and the upper edge portion is overlapped with the lower side portion of the inner flange 21.

  Then, the reinforcing sheet-like object 81 is attached to the inner panel 7 by melting and deforming each welding pin 91 from the tip side with heat. Thereafter, the latch mounting bracket 71 is mounted by sandwiching the folded piece 82 of the reinforcing sheet-like material 81 between the latch mounting portion 61 and the inner panel 7 and fastening the latch mounting portion 61 to the latch mounting portion 61 with a bridging rivet 76. Thus, according to the aspect of the reinforcing sheet member 81 of the present embodiment, the fixing sheet member 81 is folded back in the fixing operation for fixing the reinforcing sheet member 81 between the latch mounting bracket 71 and the inner panel 7. It can be done simply by folding the folded piece 82 into the latch accommodating portion 62.

  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 201. At this time, the adhesive 29 is applied to the adhesive portion 17a on the lower side portion of the outer flange 27 and the lower side portion of the inner flange 21 so as to cover the edge portion of the reinforcing sheet-like object 81 superimposed on these portions.

  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, a portion applied with the adhesive 29 is pressed by a pressing jig 205. At this time, the adhesive 29 is filled into the mesh 83 at both the upper and lower edges of the reinforcing sheet 81 by pressing with the pressing jig 205, and is passed through the mesh 83 to the inner flange 17 and the outer flange 21 of the inner panel 7. The upper and lower edges of the reinforcing sheet 81 are embedded in the adhesive 29.

  Thereafter, the adhesive 29 is cured (dried), thereby bonding the outer flange 17 and the inner flange 21 of the inner panel 7 to the outer lower panel 9b. In this way, the outer lower panel 9b can be assembled to the inner panel 7. If it does as mentioned above, the adhesion | attachment operation | work of the reinforcement sheet-like object 81 will be simplified only by the application | coating process of the adhesive agent 29 required for adhesion | attachment work of the inner panel 7 and the outer lower panel 9b, and the reinforcement sheet-like object 81. Can be

  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 55 of the inner panel 7, and the latch 111 is fixed to the latch mounting bracket 71 with the bolt 65. Further, after the wiper device and the license plate illumination lamp are attached to the interior part attaching portion 51 of the door body 3, the cover panel 57 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. In the first embodiment, the reinforcing sheet member 81 is provided in the inner space S of the lower portion 3b of the door body 3 in a state where the reinforcing sheet member 81 is widened in the vehicle width direction, and the reinforcing sheet member 81 is provided at the upper edge of the lower portion 3b. For attachment to the inner panel 7 of the latch 111 that is engaged with the striker 113 provided on the vehicle body 101 and bonded to the outer lower panel 9b having higher toughness than the inner panel 7 at both portions along the lower edge. Since the latch mounting bracket 71 used and the inner panel 7 are sandwiched and fixed between the mounting portions of the latch mounting bracket 71, 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-like object 81 is attached to the latch 111 on the inner panel 7. It is moored in the folded piece 82 in place. This prevents the reinforcing sheet-like object 81 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 81.

  Moreover, since the reinforcing sheet-like material 81 has stretchability, even if the lower portion 3b of the door body 3 is greatly deformed, the reinforcement sheet-like material 81 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. In addition, the upper and lower edges of the reinforcing sheet 81 are connected to the upper edge bonding portion 30a and the lower edge bonding portion having relatively high rigidity in which the inner panel 7 and the outer lower panel 9b of the lower body 3b of the door body 3 are bonded. 30b, the adhesive strength of the reinforcing sheet member 81 to the inner panel 7 and the outer lower panel 9b can be improved. As a result, at the time of the rear collision of the vehicle, the adhesion portion of the reinforcing sheet-like object 81 can be left together with the upper edge adhesion portion 30a and the lower edge adhesion portion 30b of the lower portion 3b. It can be maintained in the state widened in the vehicle width direction in 3b. Therefore, even if the two 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-like object 81 is left at a position corresponding to the panel scattered portion of the lower portion 3b. Therefore, it is possible to prevent a large hole from opening in the lower portion 3b.

<< Embodiment 2 of the Invention >>
The vehicular back door 1 according to the second embodiment is different from the first embodiment in the configuration of the reinforcing sheet-like object 81 and how to attach the reinforcing sheet-like object 81 to the inner panel 7. In the second embodiment, the configuration of the reinforcing sheet 81 and the mounting method thereof are the same as those of the first embodiment except for the configuration different from that of the first embodiment. Only the reinforcing sheet-like object 81 will be described, and the same components will be left to the description of the first embodiment based on FIGS. 1 to 8, and detailed description thereof will be omitted.

  FIG. 9 is a perspective view showing the rear part of the vehicle body to which the vehicle back door 1 according to the second embodiment is attached. FIG. 10 is an internal view showing the surface of the inner panel 7 according to the second embodiment on the side facing the outer panel 9 together with the reinforcing sheet-like object 81 (two-dot chain line). FIG. 11 is a view corresponding to FIG. 5 of the back door 1 according to the second embodiment. FIG. 12A is a development view of the reinforcing sheet-like object 81 according to the second embodiment as viewed from the rear side. FIG. 12B is a rear view showing a state in which the reinforcing sheet 81 is attached to the inner panel 7.

  In the first embodiment, the reinforcing sheet-like object 81 has a tongue-like folded piece 82 between a pair of cuts 84, and the folded piece 82 is fixed to the latch mounting portion 61. However, as shown in FIGS. 9 and 10, the reinforcing sheet-like object 81 of the second embodiment has an extending piece 99 that is folded back to the inner panel 7 side at a location corresponding to the latch housing portion 62. The extending piece 99 is fixed to the latch mounting portion 61.

  Specifically, as shown in FIGS. 12A and 12B, the reinforcing sheet-like object 81 is an extended piece that extends downward in a deployed state below a portion corresponding to the latch accommodating portion 62. 99 is formed in a convex shape. The extension piece 99 is folded back at a position corresponding to the rear side of the latch mounting portion 61, and extends forward from the folded portion 99 a and is latched by the latch mounting portion 61 and the inner panel 7. And a fixing portion 99b fixed between the two.

  As shown in FIG. 11, the folded portion 99 a of the extension piece 99 is fastened to the inner panel 7 by a welding pin 91 in a state where a part of the reinforcing sheet-like object 81 is overlapped. As a result, the portion of the inner panel 7 where the folded portion 99a is fastened can be suitably reinforced with the reinforcing sheet 81, and the latch mounting portion 61 can be made difficult to break. The lower edge portion of the reinforcing sheet 81 includes the folded portion 99a, and is sandwiched between the lower edge portion of the outer flange 17 and the outer lower panel 9b together with the adhesive 29 at the lower edge bonding portion 30b of the lower portion 3b. It is adhered to both panels 7 and 9b, and in the same way as in the first embodiment, at the time of rear collision of the vehicle, the adhesion portion of the reinforcing sheet 81 can be left together with the lower edge adhesion portion 30b of the lower portion 3b. Yes.

  Further, the distal end side portion of the extending piece 99 is disposed along the main body portion 7 of the inner panel 7 in the latch housing portion 62, and is fastened to the main body portion 7 with a welding pin 91. In addition, an opening 86 through which the latch 111 is inserted is formed in a portion corresponding to the latch opening 63 in the fixed portion 99 b of the extension piece 99. In addition, the opening for performing the installation operation | work of the latch 111 is not formed in the reinforcement sheet-like object 81 of this embodiment.

  FIG. 13A is a cross-sectional view showing the application process of the adhesive 29 in the assembly operation of the outer lower panel 9b to the inner panel 7 in the present embodiment. Moreover, FIG.13 (b) is sectional drawing which shows the adhesion process of the inner panel 7 and the outer lower panel 9b in the same operation | work. In order to attach the reinforcing sheet member 81 according to the second embodiment to the inner panel 7, first, the reinforcing sheet member 81 is placed at a predetermined position on the surface of the inner panel 7 facing the outer lower panel 9b.

  At this time, as shown in FIG. 13 (a), in the reinforcing sheet-like material 81, the tip end portion of the extending portion 99 is hooked on the welding pin 91 provided in the latch housing portion 62, and the fixing portion 99b is latched. The folded portion 99a is hooked on the welding pin 91 provided on the lower side portion of the outer flange 17 and folded along the portion 61. And although not shown in figure, the part near the upper end of the reinforcement sheet-like thing 81 is hooked on the welding pin 91 provided in each upper side fastening rib 93, and the upper edge part is accumulated on the lower side part of the inner side flange 21. FIG.

  Then, the reinforcing sheet-like object 81 is attached to the inner panel 7 by melting and deforming each welding pin 91 from the tip side with heat. Thereafter, the fixing portion 99b of the extension piece 99 of the reinforcing sheet-like material 81 is sandwiched between the latch mounting bracket 71 and the inner panel 7 by the latch mounting portion 61, and in this state, the latch mounting portion 61 is fixed by the blind rivet 76. Attach to the inner panel 7 by fastening.

  Next, in the same manner as in the first embodiment, the adhesive 29 is applied to portions to be bonded to the outer flange 17 of the inner panel 7 and the outer lower panel 9b of the inner flange 21. Then, the outer lower panel 9b is positioned and overlapped with the lower half portion of the inner panel 7, and the adhesive 29 is applied to the outer flange 17 and the inner flange 21 of the inner panel 7 as shown in FIG. The part is pressed with a pressing jig 205.

  Thereafter, the adhesive 29 is cured (dried), thereby bonding the outer flange 17 and the inner flange 21 of the inner panel 7 to the outer lower panel 9b. In this way, the outer lower panel 9b can be assembled to the inner panel 7.

-Effect of Embodiment 2-
According to the second embodiment, the reinforcing sheet-like object 81 is secured to the attachment position of the latch 111 in the inner panel 7 by the extending portion 99, so that the lower portion of the door body 3 is the same as in the first embodiment. Even if the panels 7 and 9b constituting the 3b are scattered, the reinforcing sheet-like object 81 can be left in a portion corresponding to the panel scattering portion of the lower portion 3b, and a large hole is opened in the lower portion 3b. Can be prevented.

  In the first embodiment, a configuration in which the reinforcing sheet 81 has the folded piece 82 is taken as an example, and the lower end portion of the folded piece 82 is the lower edge bonding portion 30b of the lower portion 3b and the outer flange 17 of the inner panel 7. Although the form bonded to the lower side portion and the outer lower panel 9b has been described, the present invention is not limited to this, and the folded piece 82 of the reinforcing sheet 81 extends to the lower edge bonding portion 30b of the lower portion 3b. However, it does not need to be bonded to the inner panel 7 and the outer lower panel 9b by the bonding portion 30b.

  Moreover, in the said Embodiment 2, the structure which the reinforcement sheet-like thing 81 has the extension piece 99 is mentioned as an example, The folding | returning part 99a of the extension piece 99 is the lower edge adhesion part 30b of the lower part 3b, and the inner panel 7 is provided. Although the form which adhere | attached on the lower side part of the outer side flange 17 and the outer lower panel 9b was demonstrated, it is not limited to this, The extension piece 99 of the reinforcement sheet-like thing 81 has the folding | returning part 99a at the lower edge of the lower part 3b. The fixing portion 99b may be fixed by being sandwiched between the latch mounting bracket 71 and the inner panel 7 without being bonded to the both panels 7 and 9b by the bonding portion 30b.

  Further, in the first and second embodiments, the reinforcing sheet-like object 81 is configured so that the portion corresponding to the latch accommodating portion 62 fits the latch accommodating portion 62 instead of the configuration having the folding piece 82 or the extending piece 99. It may have a shape bent toward the front side of the vehicle, and the bent portion may be fixed by being sandwiched between the latch mounting bracket 71 and the inner panel 7 by the latch mounting portion 61. Further, the reinforcing sheet-like object 81 is arranged along the shape of the latch housing portion 62 by extending a portion corresponding to the latch housing portion 62, and the latch mounting portion 61 uses the latch mounting bracket 71 and the inner panel 7. It may be sandwiched between and fixed.

  In the first and second embodiments, the reinforcing sheet-like object 81 is a net-like member made of a knotless net. However, the present invention is not limited to this, and the reinforcing sheet-like object 81 is made of a knotted net. It doesn't matter. Further, the reinforcing sheet-like material 81 may be a knitted fabric or a woven fabric made of stretchable fibers. As the reinforcing sheet-like material 81, it is desirable to have stretchability in multiple directions, but any material having stretchability in at least one direction can be employed.

  Moreover, in the said Embodiment 1 and 2, the adhesive agent 29 which adhere | attaches the inner panel 7 and the outer panel 9, ie, the adhesive agent 29 which adhere | attaches the upper and lower edges of the reinforcement sheet-like object 81 to the inner panel 7 and the outer lower panel 9b. However, the present invention is not limited to this, and the adhesive 29 may be an adhesive other than an elastic adhesive such as an epoxy adhesive. The same applies to the adhesive 39 that bonds the window panel 5 to the inner panel 7 and the outer panel 9.

  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. The striker 113 may be attached to the inner panel 7 of the door body 3 as an engaging device, and the body 111 may be provided with a latch 111 that engages with the striker 113. In this case, it is only necessary that the reinforcing sheet-like object 81 is sandwiched and fixed between the bracket for attaching the striker 113 to the inner panel 7 and the attachment portion of the bracket on the inner panel 7.

  Moreover, in the said Embodiment 1 and 2, although the outer panel 9 illustrated the form comprised by two division bodies of the outer upper panel 9a and the outer lower panel 9b, it is not limited to this, The outer panel 9 is 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 part 3b Lower part 5 Window panel 6 Window part 7 Inner panel 9 Outer panel 29 Adhesive 30a Upper edge adhesive part 30b Lower edge adhesive part 61 Latch attachment part (engagement device attachment part) )
62 Latch receiving part (engaging device receiving part)
71 Latch mounting bracket 81 Reinforcement sheet-like material 82 Folding piece 83 Mesh 84 Cut 99 Extension piece 99a Folding part 99b Fixing part 101 Car body 103 Back door opening 111 Latch (engaging device)

Claims (7)

The resin inner panel (7) and the resin outer panel (9) are bonded to each other, and an internal space (S) is provided between these two panels (7, 9). Comprising a door body (3) having an upper part (3a) provided with a window part (6) and a lower part (3b) positioned below the window part (6),
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) in the portion along the lower edge of the lower part (3b) A metal bracket (71) is attached to attach the engagement device (111) that is detachably engaged with
A hinge fixed to the upper edge of the opening (103) of the vehicle body (101) is attached to a portion of the upper part (3a) located above the window (6), and the hinge is centered on the hinge. The vehicle back door is capable of opening and closing the opening (103) of the vehicle body (101) by rotating in the vertical direction as
The toughness of the outer panel (9) is higher than the toughness of the inner panel (7),
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 (81) having stretchability adhered to the outer panel (9),
The vehicular back door, wherein the reinforcing sheet-like object (81) is sandwiched and fixed between the inner panel (7) and the bracket (71). In the vehicle back door according to claim 1,
An engagement device mounting portion (61), which is a portion of the inner panel (7) to which the bracket (71) is mounted, extends in the front-rear direction of the vehicle body (101),
The engagement device accommodating portion (62), which corresponds to the upper side of the engagement device mounting portion (61) of the inner panel (7) and accommodates the engagement device (111), ) Is formed in a concave shape in front of
The reinforcing sheet-like object (81) extends to the lower edge of the reinforcing sheet-like object (81) in the vertical direction at intervals in the vehicle width direction at a portion corresponding to the engagement device housing portion (62). Having a pair of cuts (84),
A portion of the reinforcing sheet-like material (81) positioned between the pair of cuts (84) is formed in the engagement device housing portion (62) along the shape of the engagement device housing portion (62). The folded piece (82) is arranged between the inner panel (7) and the bracket (71) by the engagement device mounting portion (61). Vehicle back door. The vehicle back door according to claim 2,
The lower edge portion of the lower portion (3b) of the door body (3) is a lower edge bonding portion (30b) in which the inner panel (7) and the outer panel (9) are bonded with an adhesive (29). Yes,
An adhesion portion along the lower edge of the lower portion (3b) of the reinforcing sheet-like material (81) includes a lower end portion of the folded piece (82), and the inner panel is formed by the lower edge adhesion portion (30b). A vehicular back door characterized by being sandwiched between the outer panel (9) and the outer panel (9) together with an adhesive (29) and bonded to the inner panel (7) and the outer panel (9). . In the vehicle back door according to claim 1,
An engagement device mounting portion (61), which is a portion of the inner panel (7) to which the bracket (71) is mounted, extends in the front-rear direction of the vehicle body (101),
The lower part of the reinforcing sheet-like object (81) is folded at a position corresponding to the rear side of the vehicle body (101) with respect to the engagement device mounting part (61) and partially overlapped. A folded portion (99a) fastened to the inner panel (7) in the state, and extends from the folded portion (99a) to the front of the vehicle body (101), and the engagement device mounting portion (61) An extended piece (99) having a fixing portion (99b) fixed between (7) and the bracket (71) is provided. The vehicle back door according to claim 4,
The lower edge portion of the lower portion (3b) of the door body (3) is a lower edge bonding portion (30b) in which the inner panel (7) and the outer panel (9) are bonded with an adhesive (29). Yes,
Of the reinforcing sheet-like material (81), an adhesive portion along the lower edge of the lower portion (3b) includes a folded portion (99a) of the extended piece (99), and the lower edge adhesive portion (30b) And is sandwiched between the inner panel (7) and the outer panel (9) together with the adhesive (29), and is bonded to the inner panel (7) and the outer panel (9). Vehicle back door. In the vehicle back door according to any one of claims 1 to 5,
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 panel (7) and the outer panel (9) are bonded with an adhesive (29). Yes,
Of the reinforcing sheet-like material (81), the bonded portion along the upper edge of the lower portion (3b) is the upper edge bonded portion (30a) between the inner panel (7) and the outer panel (9). A vehicular back door characterized by being sandwiched between an adhesive (29) and being bonded to the inner panel (7) and the outer panel (9). The vehicle back door according to any one of claims 3, 5, and 6,
The reinforcing sheet-like material (81) is a net-like member having a large number of meshes (83),
The adhesive (29) for adhering the reinforcing sheet (81) to the inner panel (7) and the outer panel (9) is an adhesive portion of the reinforcing sheet (81) from the outer panel (9) side. And is attached to the inner panel (7) through the mesh (83) of the reinforcing sheet (81).

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