JP6182467B2 - 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.

  In this back door, a wire is provided in the inner space of the lower portion of the door body located below the window portion in order to prevent the panels constituting the door body from being scattered due to damage at the time of a rear-end collision of the vehicle. It has been. 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. So that the reinforcing sheet-like material is connected to a separate reinforcing sheet-like material fixed to the panel by using an attachment structure to the inner panel of the engaging device that engages with the vehicle body. did.

  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 portion of the door body has a stretchability that is bonded to the outer panel at least at both portions along the upper and lower edges of the lower portion in a state of being widened in the vehicle width direction. 1 reinforcing sheet-like material, and a second reinforcing sheet-like material having extensibility, sandwiched and fixed between the bracket for attaching the engaging device and the inner panel, are provided. The first invention is characterized in that the first reinforcing sheet-like material and the second reinforcing sheet-like material are bonded to each other.

  According to a second aspect of the present invention, in the vehicle back door according to the first aspect, 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. . The adhesion portion of the first reinforcement sheet-like material to the second reinforcement sheet-like material is an adhesion portion of the first reinforcement sheet-like material to the outer panel along the lower edge of the lower portion of the door body. And the 2nd invention is with the adhesive between an inner panel and an outer panel in the lower edge adhesion part in the lower part of a door main part, and the adhesion part of the 1st reinforcement sheet-like thing and the 2nd reinforcement sheet-like thing It is sandwiched and bonded to both the inner panel and the outer panel.

  According to a third aspect of the present invention, in the vehicle back door of the second aspect, the lower edge bonding portion in the lower portion of the door body has a portion in which the inner panel and the outer panel are bonded by sandwiching only the adhesive. It is characterized by being.

  4th invention has the structure which is a net-like member in which the 1st reinforcement sheet-like thing and the 2nd reinforcement sheet-like thing are many meshes in the back door for vehicles of the 2nd or 3rd invention. And 4th invention, the adhesive agent which adhere | attaches a 1st reinforcement sheet-like material and a 2nd reinforcement sheet-like material wraps the adhesion part of the said both reinforcement sheet-like materials from between these both reinforcement sheet-like materials, The first reinforcing sheet-like material is attached to the outer panel through the mesh, and the second reinforcing sheet-like material is attached to the inner panel through the mesh.

  According to a fifth aspect of the present invention, in the vehicle back door according to the fourth aspect of the present invention, the adhesive for bonding the adhesive portion along the upper edge of the lower portion of the first reinforcing sheet-like material is applied from the inner panel side to the first reinforcement. The adhesive portion of the sheet-like material is wrapped and attached to the outer panel through the mesh of the first reinforcing sheet-like material.

  According to the first aspect of the present invention, the first reinforcing sheet-like material is provided in the inner space of the lower portion of the door body in a state of being widened in the vehicle width direction, and the second reinforcing sheet-like material is engaged with the vehicle body main body. The bracket used for mounting the inner device to the inner panel is fixed by being sandwiched between the bracket and the mounting portion of the inner panel, and the first reinforcing sheet-like material is placed along the upper and lower edges of the lower portion. In addition to adhering to the outer panel, which is tougher than the inner panel at both parts, it also adheres to the second reinforcing sheet-like material, so the lower edge of the lower part of the door body due to the rear impact of the vehicle Even if the portion of the inner panel along the bonded portion with the outer panel is damaged, the first reinforcing sheet-like material is secured to the attachment position of the engaging device on the inner panel with the second reinforcing sheet-like material. It is. Accordingly, the first reinforcing sheet-like object is prevented from being separated from the inner panel, and the inner space of the lower portion can be prevented from being completely opened outside the vehicle without the first reinforcing sheet-like object. In addition, since the first reinforcing sheet-like material and the second reinforcing sheet-like material have stretchability, even if the lower portion of the door body is greatly deformed, the first reinforcing sheet-like material is stretched according to the deformation, and the impact at the time of the rear collision of the vehicle. It is hard to tear up because it can endure. 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, the first reinforcing sheet-like material can be left at a location corresponding to the panel scattering portion of the lower portion. It can prevent that a big hole opens in the said lower part.

  According to the second invention, the first reinforcing sheet-like material and the second reinforcing sheet-like material are bonded to each other at the lower edge adhesive portion having a relatively high rigidity where the inner panel and the outer panel are bonded to each other in the door body. Since it is bonded to both the inner panel and the outer panel, the adhesive strength between the first reinforcing sheet and the second reinforcing sheet is improved, and both of these reinforcing sheets are used at the time of a rear collision of the vehicle. The adhesive part of the object can be left together with the lower edge adhesive part. Accordingly, the first reinforcing sheet-like material can be left in the lower portion of the door body in a state where the first reinforcing sheet-like material is spread over a large area.

  According to the third aspect of the invention, since the adhesive portion dedicated to the panel that does not sandwich either the first reinforcing sheet-like material or the second reinforcing sheet-like material is provided in the lower edge adhesive portion of the lower portion, the inner panel and the outer The first reinforcing sheet and the second reinforcing sheet can be bonded to the door body without impairing the sealing performance with the panel, and the bonding strength at the lower edge bonding portion between the inner panel and the outer panel can be increased. This can be increased as compared with the case where there is no adhesive portion dedicated to the panel.

  According to the fourth aspect of the present invention, the adhesive portions of the first reinforcing sheet and the second reinforcing sheet that are each net-like members are wrapped with the adhesive from between the two reinforcing sheets, and this adhesion is performed. Since the agent is attached to the door body by adhering the agent to the inner panel and the outer panel through the mesh of both the reinforcing sheet-like materials, at least one of the first reinforcing sheet-like material and the second reinforcing sheet-like material is used. The reinforcing sheet-like material is a woven or knitted fabric with no gaps or holes, such as a mesh, through which the adhesive is passed, and is bonded to the inner panel and outer panel with the adhesive applied separately on both surfaces of the reinforcing sheet-like material. Compared with the case where it does, the adhesive strength of the 1st reinforcement sheet-like thing and the 2nd reinforcement sheet-like thing with respect to an inner panel and an outer panel can be raised. In addition, it is possible to simplify the bonding work of both the reinforcing sheet-like materials by the amount of application of the adhesive necessary for the bonding work of the first reinforcing sheet-like material and the second reinforcing sheet-like material. it can.

  According to the fifth aspect of the invention, the adhesive portion along the upper edge of the lower portion of the first reinforcing sheet-like material that is a net-like member is wrapped with the adhesive from the inner panel side, and this adhesive is used as the first reinforcing sheet. Since it was made to adhere to the outer panel by adhering to the outer panel through the mesh of the object, compared with the case where the adhesive part of the first reinforcing sheet is overlapped with the adhesive previously applied to the outer panel. And the adhesive strength of the 1st reinforcement sheet-like object with respect to an outer panel can be raised.

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 an inner surface view showing the surface of the inner panel according to the embodiment of the present invention on the side facing the outer panel. 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 process diagrams showing the bonding work of the first reinforcing sheet-like material to the outer panel according to the embodiment of the present invention. FIGS. 7A and 7B are process diagrams showing an assembly operation of the door body of the vehicle back door according to the 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 embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use. In the present 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 toward 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”.

  FIG. 1 is a perspective view showing a rear part of a vehicle body to which a vehicle back door 1 according to this embodiment 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 inner surface view showing the surface of the inner panel 7 facing the outer panel 9, that is, the 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. 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. The left and right side edge portions of the lower portion 3b are side edge bonded portions 30c (see FIG. 1) in which the outer flange 17 of the inner panel 7 and the outer lower panel 9b 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 forward toward the upper side.

  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 portion is difficult to break even at the time of a rear collision of the vehicle.

  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. Compared with the comparatively thick and relatively high strength, it also 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 part where these panels 7, 9a, 9b are bonded is prevented from being completely broken 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), which is fixed to the upper edge portion of the back door opening 103 along the rotation axis in the vehicle width direction, is mounted from the front with a fastener such as a bolt. .

  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, and a substantially L-shaped side reinforcing bracket 45 made of a metal plate is provided in the plurality of brackets. It is attached to the mounting boss 44 by fastening from the rear with a fastener such as a bolt or rivet.

  At the upper end portion of the side reinforcing bracket 45, a mounting reinforcing portion 47 is provided at a position corresponding to the hinge mounting portion 41 of the inner panel 7 so as to correspond to the outer shape of the hinge mounting portion 41 and protrude rearward. 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 opening / closing hinge is connected to both the hinge mounting portion 41 of the inner panel 7 and the mounting reinforcing portion 47 of the side reinforcing bracket 45 by bolts.

  On the other hand, a damper mounting hole 49 is formed at a position corresponding to the 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 formed at the portion of the inner panel 7 where the damper mounting hole 43 is formed, and both damper mounting holes 43 and 49 of the inner panel 7 and the side reinforcing bracket 45 are provided. It is attached from the side by inserting fasteners such as bolts. The upper end of the damper is fixed at a position closer to the upper part on both 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 open and close the back door opening 103 of the vehicle body 101 by rotating in the vertical direction about the opening / closing hinge, and the opening operation is assisted by the extension operation of the damper. 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 being recessed.

  The wiper device is attached to the interior component mounting portion 51 using a metal mounting bracket 50, and the motor portion of the wiper device is connected to the upper portion of the interior component mounting portion 51 and the holes 50a and 51a provided in the mounting bracket 50. The output shaft 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 15 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. 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.

  In the middle of the latch mounting portion 61 in the vehicle width direction, a latch opening 63 for allowing the latch 111 to face the outside is formed. 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.

  The latch mounting portion 61 includes a metal latch mounting bracket 71 for mounting the latch 111 to the inner panel 7 as a rigid member that reinforces the peripheral portion of the latch opening 63, that is, the latch mounting portion 61. It is attached to the S side. The latch 111 is fixed to the latch mounting portion 61 via the latch mounting bracket 71.

  The latch mounting bracket 71 has 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 rectangular-shaped 1st reinforcement sheet-like object 81 makes the long side along the vehicle width direction in the same direction. As shown in FIGS. 2 and 5, the rectangular second reinforcing sheet 91 is sandwiched and fixed between the latch mounting bracket 71 and the inner panel 7 as shown in FIGS. 2 and 5. Is provided. The second reinforcing sheet 91 has a latch opening 92 that is slightly larger than the latch opening 63 of the inner panel 7 at a portion corresponding to the latch opening 63 of the inner panel 7. Is supposed to be inserted. And these 1st reinforcement sheet-like thing 81 and the 2nd reinforcement sheet-like thing 91 are mutually adhere | attached by the lower edge adhesion part 30b of the lower part 3b.

  The first reinforcing sheet-like member 81 and the second reinforcing sheet-like member 91 are net-like members made of a knotless network having a large number of meshes 83, 93 such as rectangles, rhombuses, hexagons, etc. The mesh of 93 is, for example, about 1.0 mm to 20.0 mm, and the flowability of adhesives 29, 85, and 95, which will be described later, used for bonding these reinforcing sheet-like materials 81 and 91, and the adhesion retention after curing. An appropriate size is selected depending on the strength. The first reinforcing sheet-like material 81 and the second reinforcing sheet-like material 91 are formed by braiding twisted yarns 81a, 91a made of stretchable fibers such as polyester, polyethylene, rubber, or nylon, Has stretchability in multiple directions such as up, down, left and right.

The lower reinforcing portion 3b is arranged so that the first reinforcing sheet-like member 81 is disposed in substantially the entire region of the lower portion 3b of the door body 3, specifically, the entire central portion excluding the side end portions on the left and right sides of the lower portion 3b.
It adheres to the outer lower panel 9b at both portions along the upper edge and the lower edge, and is stretched in the vertical direction in the internal space S of the lower portion 3b.

  As shown in FIG. 4, the upper edge portion of the first reinforcing sheet-like object 81 is formed of an elastic adhesive 85 such as a urethane-based adhesive on a portion along the upper edge adhesive portion 30a of the lower portion 3b of the outer lower panel 9b. It is glued. The adhesive 85 for adhering the upper edge of the first reinforcing sheet-like material 81, that is, the adhesive portion along the upper edge of the lower portion 3b, attaches the adhesive portion of the first reinforcing sheet-like material 81 from the inner panel 7 side. It is wrapped and attached to the outer lower panel 9b through the mesh 83 of the first reinforcing sheet 81. Thereby, the adhesive strength of the upper edge portion of the first reinforcing sheet-like material 81 with respect to the outer lower panel 9b is bonded to the adhesive applied previously on the outer lower panel 9b with the adhesive portion of the first reinforcing sheet-like material 81 being adhered. Compared to

  As shown in FIGS. 4 and 5, the lower edge portion of the first reinforcing sheet-like object 81 is different in how it is adhered to the door body 3 between the portion located behind the latch mounting portion 61 and the other portions. Yes. This is due to the configuration of the lower edge bonding portion 30b of the lower portion 3b. The lower edge bonding portion 30b of the lower portion 3b has a structure in which the bonding width in the vertical direction between the outer flange 17 of the inner panel 7 and the outer lower panel 9b is different between the portion located behind the latch mounting portion 61 and the other portions. .

  In the portion of the outer flange 17 of the inner panel 7 that constitutes the lower edge bonding portion 30b, the portion that does not correspond to the rear of the latch mounting portion 61, that is, the portion that is positioned behind the left and right sides of the latch mounting portion 61, 7, the lower part located outside the outer panel 9b faces the outer lower panel 9b, while the upper part located inside the inner panel 7 extends upwardly so as to incline forward and away from the outer lower panel 9b. The outer lower panel 9b is bonded with a relatively small area.

  On the other hand, the portion of the outer flange 17 of the inner panel 7 that constitutes the lower edge bonding portion 30b that is located behind the latch mounting portion 61 extends along the panel 9b so that the entire portion faces the outer lower panel 9b. It extends and is bonded to the outer lower panel 9b with a relatively large area. A plurality of reinforcing ribs 86 are provided at the lower side of the outer flange 17 at the rear side of the latch mounting portion 61 and the outer lower panel 9b so as to protrude downward at intervals in the vehicle width direction. .

  Of the lower edge portion of the first reinforcing sheet-like object 81, the portion located on the left and right sides of the latch mounting portion 61 is urethane on the portion of the outer lower panel 9b adjacent to the lower edge bonding portion 30b of the lower portion 3b. Bonded with an elastic adhesive 85 such as a system adhesive. The adhesive portion of the first reinforcing sheet-like object 81 is wrapped with an adhesive 85 from the inner panel 7 side and adhered to the outer lower panel 9b in the same state as the upper edge of the first reinforcing sheet-like object 81. .

  On the other hand, a portion of the lower edge portion of the first reinforcing sheet member 81 located behind the latch mounting portion 61 is the outer flange 17 of the inner panel 7 and the outer lower panel 9b together with the rear end portion of the second reinforcing sheet member 91. The second reinforcing sheet 91 is bonded with the adhesive 29 together with the adhesive 29 and is bonded to both the outer flange 17 of the inner panel 7 and the outer lower panel 9b.

  The adhesive 29 for bonding the first reinforcing sheet-like material 81 and the second reinforcing sheet-like material 91 has a bonding portion between the two reinforcing sheet-like materials 81, 91 between the two reinforcing sheet-like materials 81, 91. It is wrapped and attached to the outer lower panel 9b through the mesh 83 of the first reinforcing sheet-like material 81 and attached to the outer flange 17 of the inner panel 7 through the mesh 93 of the second reinforcing sheet-like material 91. Therefore, at least one of the first reinforcing sheet-like material 81 and the second reinforcing sheet-like material 91 is a woven or knitted material having no gaps or holes such as a mesh through which the adhesive 29 is passed, and its reinforcement Compared to the case where the adhesive on the both sides of the sheet-like material is separately applied to the outer flange 17 and the outer lower panel 9b of the inner panel 7, respectively, both the outer flange 17 and the outer lower panel 9b of the inner panel 7 are bonded. The adhesive strength of the reinforcing sheet-like objects 81 and 91 can be increased.

  The first reinforcing sheet member 81 and the second reinforcing sheet member 91 are bonded to each other at the upper portion of the lower edge bonding portion 30b of the lower portion 3b. The lower edge bonding portion 30b of the lower portion 3b includes a combined bonding portion 30d in which the outer flange 17 of the inner panel 7 and the outer lower panel 9b sandwich the first reinforcing sheet-like material 81 and the second reinforcing sheet-like material 91, and these outer portions. The flange 17 and the outer lower panel 9b have a dedicated bonding portion 30e bonded with only the adhesive 29 interposed therebetween. As a result, the first reinforcing sheet member 81 and the second reinforcing sheet member 91 can be bonded to the door body 3 without impairing the sealing performance between the inner panel 7 and the outer lower panel 9b, and the inner panel 7 It is possible to increase the bonding strength at the lower edge bonding portion 30b between the outer lower panel 9b and the outer lower panel 9b as compared with the case where there is no dedicated bonding portion 30e.

  As described above, the lower edge portion of the first reinforcing sheet member 81 and the rear end portion of the second reinforcing sheet member 91 are bonded together by the lower edge bonding portion 30b of the lower portion 3, so that the first reinforcing sheet is obtained. The adhesive strength between the object 81 and the second reinforcing sheet 91 can be improved. As a result, at the time of a rear-end collision of the vehicle, the adhesion portions of both the reinforcing sheet-like objects 81 and 91 are left together with the lower edge adhering portion 30b, and the first reinforcing sheet-like object 81 is expanded to a large area and the lower portion of the door body 3 is lowered. It can remain in the part 3b.

  The front portion of the second reinforcing sheet-like material 91 is bonded to the main body 11 of the inner panel 7 with an elastic adhesive 95 such as a urethane-based adhesive. An adhesive 95 for adhering the front portion of the second reinforcing sheet-like material 91, an adhesive 85 for adhering the upper edge portion of the first reinforcing sheet-like material 81, and a lower edge portion of the first reinforcing sheet-like material 81 The masking sheet used when the reinforcing sheet-like objects 81 and 91 are bonded to the surface opposite to the adherend with the adhesive 85 for bonding the portions located at the rear of the left and right sides of the latch mounting portion 61. 97 remains attached. In addition, the first reinforcing sheet-like object 81 is 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. ing.

  In order to assemble the back door 1 having the above-described configuration, the first reinforcing sheet-like material 81 needs to be bonded to the surface of the outer lower panel 9b facing the inner panel 7 before the outer lower panel 9b is assembled to the inner panel 7. . Below, the adhesion | attachment operation | work of the 1st reinforcement sheet-like object 81 with respect to the outer lower panel 9b is demonstrated, referring FIG. 6 (a), (b). FIG. 6A is a cross-sectional view illustrating the application process of the adhesive 85. FIG. 6B is a cross-sectional view showing the pressing process of the adhesive 85.

  In the bonding operation of the first reinforcing sheet-like member 81 to the outer lower panel 9b, first, the first reinforcing sheet-like member 81 is placed on the surface of the outer lower panel 9b facing the inner panel 7, and the first reinforcing sheet-like member. 81 is aligned at a predetermined position on the outer lower panel 9b. At this time, the upper edge part of the 1st reinforcement sheet-like object 81 is arrange | positioned in the position along the adhesion plan part with the inner panel 7 in the upper edge part of the panel 9b among the outer lower panels 9b. Moreover, the position located in the lower edge part of the 1st reinforcement sheet-like object 81 in the back of the both right and left sides of the latch attachment part 61 is a position along the planned adhesion portion with the inner panel 7 in the lower edge part of the outer lower panel 9b. In addition, a portion of the lower edge portion of the first reinforcing sheet-like material 81 that is located behind the latch mounting portion 61 is arranged at a portion to be bonded to the inner panel 7 at the lower edge portion of the outer lower panel 9b.

  Next, in the portion of the outer lower panel 9b along the portion scheduled to be bonded to the inner panel 7 at the upper and lower edges, the upper and lower edges of the first reinforcing sheet-like material 81 are disposed at the position shown in FIG. As shown in FIG. 5, the adhesive 85 is discharged so as to cover the adhesive portion of the upper and lower edges of the first reinforcing sheet-like material by discharging the adhesive 85 from the nozzle 201 while scanning the nozzle 201 of the adhesive device. Apply. At this time, the adhesive 85 is not applied to the portion of the outer lower panel 9b located behind the latch mounting portion 61.

  Subsequently, as shown in FIG. 6B, the adhesive 85 is pressed against the first reinforcing sheet-like object 81 side, that is, the outer lower panel 9 b side through the masking sheet 97 by the pressing roller 203. As a result, in the portion of the first reinforcing sheet-like material 81 to which the adhesive 85 is applied, the adhesive 85 is filled into the mesh 83 and spreads to the outer lower panel 9b through the mesh 83, and the first reinforcing sheet-like material. A twisted yarn 81 a that constitutes an adhesive portion between the upper and lower edges of 81 is embedded in the adhesive 85.

  Thereafter, the adhesive 85 is cured (dried), whereby the upper and lower edges of the first reinforcing sheet-like object 81 are bonded to the outer lower panel 9b. At this stage, a portion of the lower edge portion of the first reinforcing sheet-like object 81 that is located behind the latch mounting portion 61 is not bonded anywhere.

  On the other hand, a pair of side reinforcing brackets 45 are fastened and attached to the plurality of bracket mounting bosses 44 with fasteners on the inner panel 7. Further, the front end portion of the second reinforcing sheet member 91 is bonded to the main body portion 11 of the inner panel 7 with the adhesive 95 in the same manner as the bonding method of the first reinforcing sheet member 81 to the outer lower panel 9b, and the inner panel The latch mounting bracket 71 is attached to the latch mounting portion 61 of the seventh, and the second reinforcing sheet-like material 91 is sandwiched and fixed between the latch mounting bracket 71 and the inner panel 7.

  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, a rear end portion of the second reinforcing sheet-like material 91 is placed on a portion of the outer flange 17 of the inner panel 7 positioned behind the latch mounting portion 61, and this second reinforcing sheet-like material is placed. The adhesive 29 is applied so as to cover the rear end portion of 91.

  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, an unbonded portion of the first reinforcing sheet-like member 81 attached to the outer lower panel 9b overlaps with the rear end portion of the second reinforcing sheet-like member 91 via the adhesive 29, and is pressed by the pressing jig 205. Then, the adhesive 29 is filled into the meshes 83 and 93 of the reinforcing sheet-like materials 81 and 91 from between the reinforcing sheet-like materials 81 and 91, and the outer lower panel 9 b and the inner panel 7 are passed through the meshes 83 and 93. The lower edge of the first reinforcing sheet 81 and the rear end of the second reinforcing sheet 91 are embedded in the adhesive 29.

  Thereafter, the adhesive 29 is cured (dried) to bond the outer flange 17 of the inner panel 7 and the outer lower panel 9b. At the same time, the lower edge portion of the first reinforcing sheet member 81 and the rear end portion of the second reinforcing sheet member 91 are bonded to each other, and both the reinforcing sheet members 81 and 91 are connected to the outer flange of the inner panel 7. 17 and the outer lower panel 9b.

  In this way, the first reinforcing sheet-like material 81, the second reinforcing sheet-like material 91, the outer lower panel 9b, and the inner panel 7 need only be coated once with the adhesive 29 required for the bonding operation. The adhesion work of both the reinforcing sheet-like objects 81 and 91 can be simplified.

  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 to be bonded to the outer upper panel 9a of the outer flange 17 and the inner flange 21 of the inner panel 7, and then the outer upper panel 9a is overlapped on the upper end portion of the inner panel 7 to It adhere | attaches by pressing the outer upper panel 9a to the part which applied the adhesive agent among the outer side flange 17 and the inner side flange 21 of the panel 7. FIG.

  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 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 adhesive 39 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 lower portion 3b at the time of a rear surface collision of the back door 1. In this embodiment, the first 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 first reinforcing sheet member 81 is expanded in the vehicle width direction, and the second reinforcing sheet member 91 is connected to the latch mounting bracket 71. The first reinforcing sheet-like object 81 is tougher than the inner panel 7 at both portions along the upper and lower edges of the lower portion 3b. In addition to being bonded to the high outer lower panel 9b, it is also bonded to the rear end portion of the second reinforcing sheet member 91. Therefore, as shown in FIG. The two panels 7 and 9b constituting the upper part, that is, not only the inner panel 7 but also the outer tougher lower panel 9b having high toughness are scattered, and a portion of the inner panel 7 along the lower edge bonding part 30b of the lower part 3b is formed. Also becomes Sonsuru situation, the first reinforcing sheet-like material 81 is moored at the second reinforcing sheet-like material 91 to the latch mounting portion 61 of the inner panel 7. Accordingly, the first reinforcing sheet-like object 81 is prevented from being separated from the inner panel 7 with the outer lower panel 9b, and the inner space S of the lower portion 3b is completely opened outside the vehicle without the first reinforcing sheet-like object 81. Can be prevented. In addition, since the first reinforcing sheet-like material 81 and the second reinforcing sheet-like material 91 have stretchability, even if the lower portion 3b of the door body 3 is greatly deformed, the first reinforcing sheet-like material 81 and the second reinforcing sheet-like material 91 are stretched according to the deformation. It can withstand the impact of time and is difficult to break. Therefore, 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 first reinforcing sheet 81 is provided 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.

  In the embodiment described above, the lower edge portion of the first reinforcing sheet-like member 81 and the rear end portion of the second reinforcing sheet-like member 91 are bonded by the lower edge bonding portion 30b in the lower portion 3b of the door body 3. Although described as an example, the present invention is not limited to this, and other portions may be bonded to each other. For example, even if the lower edge portion of the first reinforcing sheet member 81 and the rear end portion of the second reinforcing sheet member 91 are bonded to each other at a position spaced upward from the lower edge bonding portion 30b of the lower portion 3b. Good. In addition, the front end portion of the second reinforcing sheet-like material 91 may be bonded to the first reinforcing sheet-like material 81 using a structure such as a convex portion provided on the plate mounting portion 53.

  Moreover, in the said embodiment, although the 1st reinforcement sheet-like article 81 and the 2nd reinforcement sheet-like article 91 were said to be a net-like member which consists of a rectangular-shaped knotless net | network, it is not limited to this, 1st reinforcement The sheet-like material 81 and the second reinforcing sheet-like material 91 may be composed of a knotted net. Moreover, the 1st reinforcement sheet-like thing 81 and the 2nd reinforcement sheet-like thing 91 may be the knitted fabric and textile fabric which consist of a fiber which has a drawability, and may be formed in other shapes, such as trapezoid shape. . The first reinforcing sheet-like material 81 and the second reinforcing sheet-like material 91 desirably have stretchability in multiple directions, but can be employed as long as they have stretchability in at least one direction. .

  Moreover, in the said embodiment, although the adhesive agent 85 which adhere | attaches the up-and-down both edge part of the 1st reinforcement sheet-like object 81 to the outer lower panel 9b etc. was an elastic adhesive agent, it is not limited to this, The said adhesive agent 85 It is also possible to employ an adhesive other than an elastic adhesive such as an epoxy adhesive. The same applies to the adhesive 29 that bonds the inner panel 7 and the outer panel 9 and the adhesive 39 that bonds the window panel 5 to the inner panel 7 and the outer panel 9.

  In the above embodiment, 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. Without being limited thereto, a striker 113 as an engagement device may be attached to the inner panel 7 of the door body 3, and a latch 111 that engages with the striker 113 may be provided on the vehicle body 101. In this case, the second reinforcing sheet-like material 91 is sandwiched and fixed between the bracket for attaching the striker 113 to the inner panel 7 and the mounting position of the bracket in the inner panel 7. And the first reinforcing sheet-like material 81 may be bonded to each other.

  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. The panel may be configured. 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 30b Lower edge adhesive part 30e Dedicated adhesive part 71 Latch mounting bracket 81 First reinforcing sheet 83 Mesh 85 Adhesive 91 Second reinforcing sheet 93 93 Mesh 101 Car body 103 Back door opening 111 Latch (engagement device)

Claims (5)

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 expanded in the vehicle width direction. A first reinforcing sheet-like material (81) having extensibility bonded to the outer panel (9), and an extensibility fixed by being sandwiched between the bracket (71) and the inner panel (7). A second reinforcing sheet (91) is provided,
The back door for vehicles, wherein the first reinforcing sheet-like object (81) and the second reinforcing sheet-like object (91) are bonded to each other. In the vehicle back door according to claim 1,
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,
The adhesion portion of the first reinforcing sheet-like object (81) with the second reinforcing sheet-like object (91) is along the lower edge of the lower part (3b) of the first reinforcing sheet-like object (81). It is an adhesive part with the outer panel (9),
The bonding portion between the first reinforcing sheet-like material (81) and the second reinforcing sheet-like material (91) is the lower edge bonding portion (30b) and the inner panel (7) and the outer panel (9). The vehicle back door is sandwiched between the inner panel (7) and the outer panel (9) by being sandwiched together with the adhesive (29). The vehicle back door according to claim 2,
The lower edge bonding portion (30b) has a portion (30e) in which the inner panel (7) and the outer panel (9) are bonded with only the adhesive (29) interposed therebetween. Vehicle back door. In the vehicle back door according to claim 2 or 3,
The first reinforcing sheet-like material (81) and the second reinforcing sheet-like material (91) are net-like members having a large number of meshes (83, 93),
The adhesive (29) for bonding the first reinforcing sheet (81) and the second reinforcing sheet (91) is formed between the two reinforcing sheets (81, 91). Wrapping the adhesive part of the object (81, 91) and attaching to the outer panel (9) through the mesh (83) of the first reinforcing sheet (81) and the second reinforcing sheet (91) The vehicle back door is attached to the inner panel (7) through the mesh (93). The vehicle back door according to claim 4,
The adhesive (85) for adhering the adhesive portion along the upper edge of the lower portion (3b) in the first reinforcing sheet-like material (81) is shaped like the first reinforcing sheet from the inner panel (7) side. A vehicular back door characterized by wrapping an adhesive portion of an object (81) and adhering to the outer panel (9) through a mesh (83) of the first reinforcing sheet-like object (81).

Images