JP6488186B2 - 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 provided with a door main body formed by bonding a resin inner panel and a resin outer panel, and having an opening for a window provided in an upper half portion of the door main body. In this back door, metal side reinforcing brackets (reinforces) that reinforce the inner panel are attached to both left and right end portions of the inner panel from the upper half portion to a part of the lower half portion. Further, a metal latch mounting bracket (lock reinforcement) for mounting a latch that engages with a striker provided in the vehicle body is mounted at the center of the lower end of the inner panel.

  And in this back door, in order to prevent scattering of the panel which constitutes the door body due to breakage at the time of a rear-end collision of the vehicle, a wire is placed in the inner space of the lower part located below the window opening in the door body. 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. However, except for these both ends, the wire does not remain on the inner panel or the outer panel. And it is constructed along the outer periphery of the inner panel. For this reason, there is a risk that a panel constituting the same part will scatter in the center part of the lower part of the door body and a large hole will be opened in the door body, and therefore, measures against panel scattering should be taken. Is desired.

  Therefore, as a countermeasure against scattering of the panel, a panel constituting the central portion of the lower portion is provided in the inner space in the lower portion of the door body in a state where a reinforcing sheet-like material having stretchability is bonded to the outer panel and spread. Even if splatters, it is conceivable to leave a reinforcing sheet-like material at a location corresponding to the splattered portion of the panel.

  However, if only the upper and lower edges are attached to the reinforcing sheet-like material, for example, depending on the degree of rear collision and the severity of the vehicle, the stress caused by the load applied to the reinforcing sheet-like material may be local. It is easy to concentrate, and there is a possibility that the reinforcing sheet-like material may tear apart from the stress concentration portion. In that case, even if a reinforcing sheet-like material is provided, a large hole may be formed in the lower portion of the door body.

  The present invention has been made in view of such a point, and an object of the present invention is to provide the lower portion even when the inner panel and the outer panel constituting the lower portion of the door body are scattered at the time of a rear surface collision of the vehicle. An object of the present invention is to provide a vehicle back door that can prevent a large hole from being opened.

  In order to achieve the above object, in the present invention, the reinforcing sheet-like material having stretchability as described above is provided in the lower portion of the door body, and the method of adhering the reinforcing sheet-like material to the outer panel is devised.

  Specifically, the present invention includes a resin inner panel and a resin outer panel bonded to face each other, and includes a door body having an internal space between the two panels. The following solution is taken for a vehicle back door provided with a window opening.

That is, the first invention has a configuration in which the inner panel and the outer panel are bonded with an adhesive having rubber elasticity. In the inner space of the lower portion located below the window opening in the door main body, a stretchable reinforcing sheet-like material is provided in a state of being expanded corresponding to the back surface of the outer panel. The outer panel has an opening in the lower portion. Reinforcing sheet has an opening corresponding to the opening of the outer panel, and a streak bonded portion bonded to streak with an adhesive having a rubber elasticity to the backside of the outer panel. According to the first aspect of the present invention, the streak-like adhesive portion includes at least the upper and lower edge portions of the lower portion of the door body and the reinforcing sheet-like material between the upper and lower edge portions and the vehicle width of the outer panel. It is formed of a transverse adhesive part that adheres in the direction and a connecting adhesive part that connects the transverse adhesive parts, and forms a frame-like adhesive part that surrounds the opening at the periphery of the opening of the reinforcing sheet. It is characterized by.

According to a second aspect of the invention, in the vehicular back door of the first aspect, the streak-like adhesive portion divides the reinforcing sheet-like material into a plurality of non-adhesive portions by the transverse adhesive portion and the connecting adhesive portion. To do .

According to a third invention, in the vehicle back door of the first or second invention, the outer panel is bonded to the inner panel at the frame-shaped bonding portion.

4th invention has the structure by which the inner panel and the outer panel were adhere | attached with the adhesive agent which has rubber elasticity. In the inner space of the lower portion located below the window opening in the door main body, a stretchable reinforcing sheet-like material is provided in a state of being expanded corresponding to the back surface of the outer panel. The reinforcing sheet-like material is a net-like member having a large number of meshes, and has a streak-like adhesive portion that is adhered in a streak-like manner with an adhesive having rubber elasticity on the back surface of the outer panel. The streak-like adhesive portion includes at least a transverse adhesive portion for adhering the reinforcing sheet-like material in the vehicle width direction at an upper edge side portion and a lower edge side portion of the lower portion and a portion between these upper and lower edge side portions. It is formed with the connection adhesion part which connects adhesion parts. Further, the streak-like adhesive portion is covered with an adhesive from the inner panel side, and this adhesive is adhered to the outer panel through the mesh of the reinforcing sheet-like material, thereby being adhered to the outer panel. On the inner panel side of the reinforcing sheet-like material, a pressing sheet corresponding to the reinforcing sheet-like material and used to press the adhesive of the streak-like adhesive portion to the outer panel side is stuck with the adhesive of the streaky adhesive portion. It is attached. The fourth invention is characterized in that the pressing sheet has at least one functionality among heat insulation, soundproofing and electromagnetic shielding properties.

  According to the first invention, the reinforcing sheet-like material is provided in the inner space in the lower portion of the door body so as to expand in correspondence with the back surface of the outer panel, and the reinforcing sheet-like material is formed in a streak-like transverse adhesive portion with respect to the outer panel. And when the vehicle is hit by a collision such as a rear collision, the impact applied to the reinforcing sheet-like material is dispersed throughout the lower part, thereby reinforcing the reinforcing sheet. It is possible to prevent local stress concentration from occurring on the object. And since this reinforcing sheet-like material has stretchability, even if the lower portion of the door 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 apart. . Therefore, even if both panels constituting the lower part of the door body are scattered due to a vehicle collision accident, it is possible to leave a reinforcing sheet-like material in the lower part, thus preventing a large hole from being opened in the lower part. it can.

In addition, according to the first invention, since the opening peripheral portion of the reinforcing sheet-like material is the frame-shaped adhesive portion, the rigidity of the opening peripheral portion can be improved. If the reinforcing sheet has an opening, when the reinforcing sheet is loaded due to a vehicle collision accident, it tends to tear from the periphery of the opening. It is possible to prevent the reinforcing sheet-like material from being cleaved from the periphery of the opening.

According to the second invention, when the vehicle is hit by a collision accident such as a rear-end collision, the impact applied to the reinforcing sheet-like object can be more effectively distributed throughout the lower portion.

According to the third invention, since the outer panel is bonded to the inner panel in addition to the reinforcing sheet-like material at the frame-shaped adhesive portion, the rigidity of the opening peripheral portion of the reinforcing sheet-like material can be further increased, thereby It is possible to more reliably prevent the reinforcing sheet-like material from being cleaved from the periphery of the opening.

According to the fourth invention, similarly to the first invention, even if both panels constituting the lower part of the door body are scattered due to a vehicle collision accident, a reinforcing sheet-like object may be left in the lower part. Since it can do, it can prevent that a big hole opens in the said lower part.

Further , according to the fourth invention, the reinforcing sheet-like material that is a net-like member is partially covered with an adhesive and adhered to the outer panel, so that the reinforcing sheet-like material passes through the adhesive or the like. Compared with the case where the reinforcing sheet-like material is bonded to the outer panel with an adhesive, the adhesive strength of the reinforcing sheet-like material to the outer panel can be increased.

Further , according to the fourth invention, the reinforcing sheet-like material disposed on the back side of the outer panel is pressed with the adhesive of the streak-like adhesive portion using the pressing sheet, and the pressing sheet is used as the reinforcing sheet-like material. since it was decided to remain pasted to the outer panel with, it is not necessary to perform the task of separating the presser sheet, and can be easily bonded to the reinforcing sheet in the outer panel, a back door according to the fourth invention Can be realized easily.

In addition, according to the fourth invention, as a pressing sheet, a sheet having at least one functionality among heat insulating properties, soundproofing properties and electromagnetic wave shielding properties is adopted separately from the use of pressing an adhesive. The functionality of the pressing sheet can be added to the back door. Thereby, the heat insulation performance and soundproof performance of a back door can be improved, or an electromagnetic wave shielding property can be given to a back door.

FIG. 1 is an overall perspective view of a vehicular back door according to Embodiment 1 of the present invention as viewed from the rear side. FIG. 2 is an exploded perspective view of the vehicle back door according to the first embodiment of the present invention. FIG. 3 is a back view of the outer lower panel constituting the vehicle back door according to the first embodiment of the present invention as viewed from the inner panel side. FIG. 4 is a view of the outer lower panel of the vehicle back door according to the first embodiment of the present invention and the reinforcing sheet-like material bonded thereto, as viewed from the inner panel side. FIG. 5 is a cross-sectional view of the lower portion of the back door at a location corresponding to line VV in FIG. FIGS. 6A to 6C are process diagrams showing an operation of attaching a reinforcing sheet-like object to the outer lower panel in the vehicle back door assembly method according to the first embodiment of the present invention. FIGS. 7A and 7B are process diagrams showing an operation of assembling the outer lower panel to the inner panel in the vehicle back door assembling method 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 an exploded perspective view showing an outer lower panel of a vehicular back door according to Embodiment 2 of the present invention, a reinforcing sheet-like material, and a pressure sheet attached thereto. FIG. 10 is a view of the outer lower panel of the vehicle back door according to the second embodiment of the present invention, the reinforcing sheet-like material and the pressing sheet bonded thereto, as viewed from the inner panel side. 11 is a cross-sectional view of the lower portion of the back door at a location corresponding to the line XI-XI in FIG. FIG. 12A is an enlarged cross-sectional view of the outer lower panel, the reinforcing sheet-like material, and the pressing sheet taken along line XIIa-XIIa in FIG. Fig. 12 (b) is a view corresponding to Fig. 12 (a) of the vehicle back door according to the first modification of the second embodiment of the present invention. FIG. 12C is a view corresponding to FIG. 12A of the vehicle back door according to the second modification of the second embodiment of the present invention. FIG. 12D is a view corresponding to FIG. 12A of the vehicle back door according to the third modification of the second embodiment of the present invention. FIG. 13 is a view of an outer lower panel of a vehicular back door according to a third embodiment of the present invention, a reinforcing sheet-like material bonded thereto, and a pressing sheet, as viewed from the inner panel side. 14 is a cross-sectional view of the vehicle back door at a location corresponding to the line XIV-XIV in FIG. 13.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use. In the following embodiments, for convenience of explanation, the front side in the vehicle front-rear direction is referred to as “front”, the rear side is referred to as “rear”, the left side in the vehicle width direction facing the front of the vehicle is “left”, and the right side is “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 shows an overall perspective view of the vehicle back door 1 according to the first embodiment as viewed from the rear side. A back door 1 shown in FIG. 1 is a vertical door that opens and closes a back door opening 203 provided at the rear end of a vehicle body 201 of a hatchback vehicle. The back door 1 includes a door body 3 composed of a plurality of resin panels 13 and 15 and a resin or glass window panel 5 held on the upper half of the door body 3.

  The back door 1 is provided with a window portion 7 that can be daylighted into the vehicle through the window panel 5. The door main body 3 includes an upper portion 3 a provided with the window portion 7 and a lower portion 3 b positioned below the window portion 7. A plate attachment portion 9 to which a license plate (number plate) is attached is provided at a central portion in the left-right direction of the lower portion 3b of the door body 3. Further, rear lamps 11 such as stop lamps and turn signals are respectively attached to the left and right side portions of the plate attachment portion 9 in the lower portion 3b.

  FIG. 2 shows an exploded perspective view of the back door 1. 3 shows a rear view of the outer lower panel 63 constituting the lower portion 3b of the door body 3 as viewed from the inner panel 13, and FIG. 4 shows the outer lower panel 63 and the reinforcing sheet-like material 91 bonded thereto as an inner. The figure seen from the panel 13 side is shown, respectively. 5 shows a cross-sectional view of the lower portion 3b of the back door 1 at a location corresponding to the line V-V in FIG. As shown in FIG. 2, the door body 3 is formed by bonding a resin inner panel 13 located on the inside of the vehicle and a resin outer panel 15 located on the outside of the vehicle so as to face each other. An internal space S (see FIG. 5) is provided between the panels 13 and 15.

  The inner panel 13 is a single-piece panel formed by injection molding or the like, and for example, glass fiber-containing polypropylene (PP-GF: Polypropylene Glass Fiber) or carbon fiber-containing polypropylene (PP-CF: Polypropylene Carbon Fiber). It consists of a thermoplastic resin containing a fiber reinforcing material such as. As a result, the rigidity of the inner panel 13 is higher than the rigidity of two panels (the outer upper panel 61 and the outer lower panel 63), which will be described later, constituting the outer panel 15.

  The inner panel 13 has a main body 17 that faces the outer panel 15 in the front-rear direction and forms the main body of the inner panel 13. A substantially trapezoidal window opening 19 extending in the vehicle width direction is formed in the upper half portion of the main body portion 17. Around the window opening 19 of the inner panel 13, there are an inner standing wall 21 that rises toward the outer panel 15 side, and an inner flange 23 for joining that projects from the rear end of the inner standing wall 21 into the window opening 19. Is provided over the entire circumference. In addition, an outer standing wall 25 rising to the outer panel 15 side and an outer flange 27 for joining projecting outward from the rear end of the outer standing wall 25 are provided on the outer peripheral edge of the inner panel 13 over the entire circumference. Is provided.

  As described above, the inner panel 13 has a concave shape in which the inner peripheral edge and the outer peripheral edge around the window opening 19 in the main body 17 rise to the outer panel 15 side. The left and right side portions of the window opening 19 in the inner panel 13 are respectively constituted by inner pillar portions 29 having a concave horizontal section that directs the opening toward the rear of the vehicle. Each inner pillar portion 29 includes a bridging piece 31 that bridges and connects an outer wall 29 a located outside in the vehicle width direction and an inner wall 29 b located inside in the vehicle width direction to the left and right. One pair is provided on each of the upper and lower sides.

  Of the pair of upper and lower bridging pieces 31, the upper bridging piece 31 positions the outer upper panel 61 in the vertical and horizontal directions when an outer upper panel 61, which will be described later, which is a part of the outer panel 15 is assembled to the inner panel 13. Used for. On the other hand, the lower bridging piece 31 is used for vertical and horizontal positioning of the outer lower panel 63 when an outer lower panel 63 (described later), which is a part of the outer panel 15, is assembled to the inner panel 13. Each bridging piece 31 is provided with a fastening hole 33 for fastening a fastener such as a bolt and a positioning hole 35 for positioning.

  In addition, the inner panel 13 is provided with a storage unit 37 that stores electrical components and mechanical components from the middle portion of the lower side portion of the inner standing wall 21 in the left-right direction to the lower side portion of the outer standing wall 25. The storage unit 37 includes a lower storage portion 37A formed in a portion from a position slightly above the middle position in the vertical direction to the lower end, and an upper storage portion 37B formed above the lower storage portion 37A. It consists of and.

  The lower storage portion 37A includes a plate fastening portion 39 that is recessed at the front side and protrudes rearward, and a pair of vertical wall portions that extend in the vertical direction from the left and right ends of the plate fastening portion 39 to the lower side portion of the outer standing wall 25. 41. A latch mounting portion 43 to which a latch (not shown) for locking the back door 1 to the vehicle body main body 201 in a closed state is attached is provided between the pair of vertical wall portions 41 in the lower side portion of the outer standing wall 25. ing.

  The plate fastening portion 39 is provided with a fastening boss (not shown) to which a fastener such as a bolt for fastening the license plate is fastened, and a latch is attached to the latch attachment portion 43 or a harness is wired. A working opening 45 for mounting or maintenance is formed. A recess formed on the front side of the inner panel 13 by the storage unit 37 including the work opening 45 is closed by a cover panel (not shown).

  On the other hand, the upper storage part 37B is higher in the front-rear direction than the lower storage part 37A, and is formed to protrude rearward from the lower storage part 37A. A step difference between the upper storage part 37B and the lower storage part 37A have. A part mounting recess 47 having a shape recessed forward is formed so as to cut out a corner of the upper storage portion 37B at an intermediate portion in the left-right direction of the lower portion of the upper storage portion 37B. A knob mechanism and a license plate illumination lamp (both not shown) for operating the lock state of the latch are attached to the component mounting recess 47.

  Furthermore, lamp installation portions 49 in which the rear lamps 11 are installed are respectively provided on the left and right sides of the storage unit 37 in the main body portion 17 of the inner panel 13 on the outer side in the vehicle width direction. As shown in FIG. 5, the lamp installation portion 49 has a rectangular opening 51 on the front side, a frame-like standing wall 53 that rises from the periphery of the opening 51 toward the outer panel 15, and a rear of the frame-like standing wall 53. It is comprised by the flange piece 55 projected over the opening 51 inward from the edge.

  As shown in FIG. 2, an inner-side lamp opening 57 for inserting the rear lamp 11 is formed in a rectangular shape at the rear end of the lamp installation portion 49, as shown in FIG. Yes. That is, the inner lamp opening 57 is formed to be slightly smaller than the front opening 51 of the lamp installation portion 49. The front opening 51 of the lamp installation part 49 is closed by a cover panel 58 as shown in FIG.

  Further, as shown in FIG. 2, a portion of the inner panel 13 positioned above the window opening 19, specifically, an upper edge portion of the inner panel 13, between the main body portion 17 and the outer standing wall 25. The part is provided with a pair of hinge mounting portions 59 that are recessed on the front side and protrude rearward, on the left and right sides in the vehicle width direction. The back door 1 is attached to each of the hinge attachment portions 59 so as to be openable and closable to the vehicle body 201 via an opening / closing hinge (not shown) fixed from the front by a fastener such as a bolt.

  The outer panel 15 is composed of an outer upper panel 61 positioned on the upper side and an outer lower panel 63 positioned on the lower side, which are divided into upper and lower parts. The outer upper panel 61 and the outer lower panel 63 are panels formed by injection molding or the like. For example, polypropylene containing talc (PP-T: Polypropylene Talc) or ethylene propylene diene methylene rubber (EPDM: Ethylene Propylene Diene). Monomer) is a synthetic resin mixed. Thereby, the toughness of the outer upper panel 61 and the outer lower panel 63 is higher than the toughness of the inner panel 13.

  The outer upper panel 61 is a horizontally long panel elongated in the vehicle width direction, is formed in a triangular shape in a side view having a hollow portion, and has a spoiler that produces a so-called downforce effect. The outer upper panel 61 is opposed to a portion of the inner panel 13 above the window opening 19 and constitutes an upper portion 3 a of the door body 3. The outer peripheral edge of the outer upper panel 61 is bonded to an outer lower panel 63, which will be described later, on the upper edge and the upper edge of the left and right sides of the outer flange 27 of the inner panel 13 and the upper edge of the inner flange 23. The same adhesive (elastic adhesive) 70 is used.

  At the lower edge portion of the outer upper panel 61, an upper step portion 65 that is recessed forward is provided over substantially the entire vehicle width direction. Upper extension pieces 67 extending downward along the inner pillar portion 29 are provided at both left and right end portions of the upper step portion 65. Each of the upper extension pieces 67 is formed with an insertion hole 68 and a positioning projection 69 similar to those of the lower extension piece 73 of the outer lower panel 63 described later.

  On the other hand, the outer lower panel 63 is opposed to a portion of the inner panel 13 below the window opening 19 and constitutes a lower portion 3 b of the door body 3. The outer peripheral edge portion of the outer lower panel 63 is bonded to the lower half portion and the lower side portion of the left and right side portions of the outer flange 27 of the inner panel 13 and the lower side portion of the inner flange 23 with an adhesive 70. . The portion of the outer lower panel 63 that is bonded to the inner panel 13 is indicated by a two-dot chain line in FIG. This also applies to FIGS. 10 and 13 referred to in later embodiments.

  As shown in FIG. 5, the upper edge portion of the lower portion 3 b of the door body 3 constitutes an upper edge bonding portion 3 x in which the inner flange 23 of the inner panel 13 and the outer lower panel 63 are bonded with an adhesive 70. . The lower edge portion of the lower portion 3 b constitutes a lower edge bonding portion 3 y in which the lower side portion of the outer flange 27 of the inner panel 13 and the outer lower panel 63 are bonded with an adhesive 70. Further, the left and right side edge portions of the lower portion 3b constitute a side edge bonding portion 3z in which the side portion of the outer flange 27 of the inner panel 13 and the outer lower panel 63 are bonded with an adhesive 70 ( (See FIG. 1).

  As shown in FIG. 3, a lower stepped portion 71 that is recessed forward is provided on the upper edge portion of the outer lower panel 63 over substantially the entire vehicle width direction. Lower extension pieces 73 extending upward along the inner pillar portion 29 are respectively provided at both left and right end portions of the lower step portion 71. The lower extension piece 73 is formed with an insertion hole 68 corresponding to the fastening hole 33 of the bridging piece 31 of the inner panel 13 and a positioning projection 69 inserted into the positioning hole 35 of the bridging piece 31. ing.

  As shown in FIGS. 1 to 3, the plate attachment portion 9 is formed in a concave shape that is recessed forward in the central portion of the outer lower panel 63 corresponding to the plate fastening portion 39, and the open surface has a lower side on the upper side. Larger trapezoidal shape. The plate mounting portion 9 includes a plate mounting seat 77 facing rearward in a posture inclined forward and upward, a pair of side wall portions 78 extending in the left and right sides of the plate mounting seat 77, and the plate mounting seat 77. An upper wall portion 79 that connects the pair of side wall portions 78 on the upper side is provided.

  The plate mounting seat 77 is a portion where the license plate is installed, and has a pair of plate mounting holes 81 into which fasteners such as bolts for mounting the plate are inserted. Further, the upper wall portion 79 of the plate mounting portion 9 has a knob opening 83 for operating the knob mechanism and a light projecting opening 85 through which the light of the license plate illumination lamp passes. The knob opening 83 is provided in the middle of the upper wall portion 79 in the left-right direction. One projection opening 85 is provided on each of the left and right sides of the knob opening 83.

  Further, in the outer lower panel 63 on the left and right sides of the plate mounting portion 9 corresponding to the lamp installation portion 49 of the inner panel 13, a rectangular outer portion that is equal to or slightly smaller than the inner-side lamp opening 57. Side lamp openings 87 are respectively formed. As shown in FIG. 5, a rectangular frame-like projecting wall 89 projecting toward the inner panel 13 is provided around the outer lamp opening 87 of the outer lower panel 63. The protruding wall 89 is inserted inside the inner lamp opening 57. The rear lamp 11 is mounted on the door body 3 in a state of being inserted into the lamp installation portion 49 through the outer lamp opening 87 and the inner lamp opening 57.

  The adhesive 70 that bonds the outer upper panel 61 and the outer lower panel 63 to the inner panel 13 is a so-called elastic adhesive having rubber elasticity. The elastic adhesive 70 becomes a rubber-like elastic body when cured, disperses internal stress due to thermal strain or the like from the adherend, and absorbs external stress such as vibration or impact. As the elastic adhesive 70, for example, a urethane-based adhesive can be employed.

  Of the door body 3, the outer upper panel 61 and the outer lower panel 63 and the inner panel 13, including the upper edge bonding portion 3 x, the lower edge bonding portion 3 y and the side edge bonding portion 3 z of the lower portion 3 b, are both panels. As much as 61, 63, and 13 are overlapped via the adhesive 70, the door body 3 is relatively thicker and stronger than the other parts in the door body 3. The generated stress is partially absorbed by the adhesive 70. Thus, the outer upper panel 61 and the bonded portion of the outer lower panel 63 and the inner panel 13 are difficult to break even at the time of a rear collision of the vehicle.

  Then, as shown in FIGS. 4 and 5, in the inner space S in the lower portion 3 b of the door body 3, a rectangular reinforcing sheet-like object 91 extends its long side along the vehicle width direction and the outer lower panel 63. It is provided in a state where it is expanded in correspondence with the back surface. The reinforcing sheet-like material 91 is a net-like member made of a knotless net having a number of meshes such as a rectangle, a rhombus, and a hexagon. The mesh 93 of the reinforcing sheet 91 is about 1.0 mm to 20.0 mm, and the flowability of the elastic adhesive 90 used for bonding the reinforcing sheet 91 to the outer lower panel 63. The appropriate size is selected according to the adhesive retention strength after curing.

  The reinforcing sheet-like product 91 is formed by knitting a twisted yarn 91a made of a stretchable fiber such as polyester, polyethylene, rubber, or nylon. This reinforcing sheet-like material 91 has stretchability in multiple directions such as up, down, left, and right, so that even if the lower portion 3b of the door body 3 is greatly deformed, it is stretched according to the deformation. It can withstand the impact of a rear collision and is difficult to tear apart. The reinforcing sheet-like material 91 is stretched in the vertical direction so as to be disposed in substantially the entire region of the lower portion 3b of the door body 3, that is, the entire central portion excluding the left and right side end portions of the lower portion 3b. Has been.

  A portion of the reinforcing sheet 91 corresponding to the plate mounting portion 9 is formed with a rectangular center opening 95 that collectively surrounds both the plate mounting holes 81, the knob opening 83, and the light projecting opening 85. Further, a side opening 97 through which the protruding wall 89 is inserted is formed in a portion corresponding to each outer lamp opening 87 in the reinforcing sheet-like material 91. The center opening 95 and the side opening 97 are arranged side by side in the same direction at intervals in the vehicle width direction.

  The reinforcing sheet-like object 91 has a streak-like adhesive portion 99 that is adhered in a streak-like manner with an elastic adhesive 90 on the back surface of the outer lower panel 63. Specifically, the streak-like adhesive portion 99 is covered with the adhesive 90 from the inner panel 13 side, and the adhesive 90 adheres to the outer lower panel 63 through the mesh 93 of the reinforcing sheet-like material 91. Bonded to the lower panel. The streak-like adhesive portion 99 includes a transverse adhesive portion 101 that straightly bonds the reinforcing sheet-like object 91 at a plurality of portions in the vehicle width direction, and a plurality of connection adhesive portions 103 that connect the transverse adhesive portions 101 to each other. Is formed.

  The transverse adhesive portion 101 includes a first transverse adhesive portion 101a that adheres the upper edge portion of the reinforcing sheet-like material 91 at a portion along the upper edge adhesive portion 3x of the door body 3 lower portion 3b, a center opening 95, and a side opening 97. A second transverse adhesive portion 101b for adhering the reinforcing sheet-like material 91 directly on the upper side, a third transverse adhesive portion 101c for adhering the reinforcing sheet-like material 91 immediately below the center opening 95 and the side opening 97, and a reinforcing sheet The lower edge part of the shaped object 91 is comprised by the 4th crossing adhesion part 101d which adhere | attaches the part along the lower edge adhesion part 3y of the door main body 3 lower part 3b. These first to fourth transverse adhesive portions 101a, 101b, 101c, and 101d adhere the reinforcing sheet 91 to the outer lower panel 63 over substantially the entire vehicle width direction.

  The connecting adhesive part 103 includes a longitudinal adhesive part 105 that adheres the reinforcing sheet-like material 91 straight in a plurality of portions in the vertical direction, and an oblique adhesive part 107 that extends obliquely with respect to the longitudinal adhesive part 105. It is configured.

  The longitudinal adhesive portion 105 includes a first longitudinal adhesive portion 105a that adheres the right edge of the reinforcing sheet-like material 91 at a portion along the right side edge adhesive portion 3z of the door body 3 lower portion 3b, and a right side opening 97. A second longitudinally bonded portion 105b for adhering the reinforcing sheet-like material 91 immediately on the left side, a third longitudinally adhesive portion 105c for adhering the reinforcing sheet-like material 91 immediately on the right side of the center opening 95, and a right side of the center opening 95. A fourth longitudinal adhesive portion 105d for adhering the reinforcing sheet material 91, a fifth longitudinal adhesive portion 105e for adhering the reinforcing sheet material 91 just on the right side of the left side opening 97, and a left edge of the reinforcing sheet material 91 And a sixth longitudinal adhesive portion 105f for adhering at a portion along the left side edge adhesive portion 3z of the door main body 3 lower portion 3b.

  The first longitudinal adhesive portion 105a and the sixth longitudinal adhesive portion 105f are integrally formed with the end portions of the first to fourth transverse adhesive portions 101a, 101b, 101c, and 101d that are located on opposite sides of each other, and are reinforced. The sheet-like object 91 is bonded to the outer lower panel 63 over substantially the entire vertical direction. The second longitudinal adhesive portion 105b and the fifth longitudinal adhesive portion 105e are provided only between the second transverse adhesive portion 101b and the third transverse adhesive portion 101c, and both the second and third transverse adhesive portions 101b, 101c and both ends. It is formed by connecting the parts together. The third longitudinal adhesive portion 105c and the fourth longitudinal adhesive portion 105d are formed integrally with the middle portion of the first to fourth transverse adhesive portions 101a, 101b, 101c, 101d, and the reinforcing sheet-like material 91 is moved up and down. It adheres to the outer lower panel 63 over substantially the entire direction.

  Among the line-shaped adhesive portions 99, the second transverse adhesive portion 101b, the third transverse adhesive portion 101c, the third longitudinal adhesive portion 105c, and the fourth longitudinal adhesive portion 105d are center frame-like adhesives that surround the center opening 95 with the periphery thereof. A portion 99a is formed. Therefore, the rigidity of the periphery of the center opening 95 in the reinforcing sheet-like material 91 is higher than that of other parts.

  In addition, the second transverse adhesive portion 101b, the third transverse adhesive portion 101c, the first longitudinal adhesive portion 105a, and the second longitudinal adhesive portion 105b include a side frame-like adhesive portion 99b that surrounds the right side opening 97 with its peripheral portion. Forming. As a result, the rigidity of the peripheral portion of the right side opening 97 in the reinforcing sheet-like material 91 is also higher than that of other portions.

  Further, the second transverse adhesive portion 101b, the third transverse adhesive portion 101c, the fifth longitudinal adhesive portion 105e, and the sixth longitudinal adhesive portion 105f include a side frame-like adhesive portion 99b that surrounds the left side opening 97 with its peripheral edge. Forming. Therefore, the rigidity of the periphery of the left side opening 97 in the reinforcing sheet-like material 91 is also higher than that of other portions.

  The outer lower panel 63 is also bonded to the inner panel 13 at the center frame-shaped adhesive portion 99a and the both side frame-shaped adhesive portions 99b. With this configuration, the rigidity of the periphery of the center opening 95 and the periphery of each side opening 97 of the reinforcing sheet-like material 91 is further enhanced.

  When the reinforcing sheet 91 has an opening, when a load is applied due to a collision accident of the vehicle, the opening tends to start from the periphery of the opening, but in this embodiment, a center frame shape is formed. With the effect of improving the rigidity by the adhesive portion 99a and the side frame-like adhesive portions 99b, the reinforcing sheet-like material 91 can be prevented from being split from the peripheral portion of the center opening 95 and the peripheral portions of the side openings 97.

  On the other hand, the oblique bonding portion 107 is a rectangular sheet surrounded by the third transverse adhesive portion 101c, the fourth transverse adhesive portion 101d, the first longitudinal adhesive portion 105a, and the third longitudinal adhesive portion 105c in the reinforcing sheet-like material 91. The first oblique adhesive portion 107a that divides the shape portion into four, and the third transverse adhesive portion 101c, the fourth transverse adhesive portion 101d, the third longitudinal adhesive portion 105c, and the fourth longitudinal adhesive in the reinforcing sheet-like material 91 A second diagonally bonded portion 107b that divides the rectangular portion surrounded by the portion 105d into four, and the third transverse adhesive portion 101c, the fourth transverse adhesive portion 101d, and the fourth longitudinal section of the reinforcing sheet 91. The rectangular portion surrounded by the bonding portion 105d and the sixth longitudinal bonding portion 105f is composed of a third oblique bonding portion 107c that divides the rectangular portion into four.

  The first diagonally bonded portion 107a is formed by a pair of diagonally lined portions 107x and 107y that connect diagonal portions that are different from each other in a rectangular shape divided by the first diagonally bonded portion 107. Yes. Specifically, the first oblique adhesive portion 107a is formed by a corner portion formed by the third transverse adhesive portion 101c and the first longitudinal adhesive portion 105a, a fourth transverse adhesive portion 101d, and the third longitudinal adhesive portion 105c. A first oblique line portion 107x that extends straight between the corner portions in a diagonally upward direction and is integrally connected to both corner portions, and a corner portion formed by the fourth transverse adhesive portion 101d and the first longitudinal adhesive portion 105a. A second oblique line portion 107y is formed integrally with the corner portion formed by the third transverse adhesive portion 101c and the third longitudinal adhesive portion 105c so as to extend straight in the diagonally upward direction and are integrally connected to both corner portions. Being done. In addition, the second oblique adhesion portion 107b and the third oblique adhesion portion 107c are also composed of a pair of oblique line portions 107x and 107y that correspond to the first oblique line portion 107x and the second oblique line portion 107y and intersect each other. ing.

  In this way, the reinforcing sheet-like material 91 is bonded to the outer lower panel 63 almost entirely by the above-described streak-like adhesive portion 99, and is attached to the plurality of non-adhesive portions 109 by the transverse adhesive portion 101 and the connecting adhesive portion 103. It is partitioned. Thereby, when the vehicle is hit by a collision accident such as a rear collision, it is possible to effectively disperse the impact applied to the reinforcing sheet 91 on the entire lower portion 3b of the door body 3.

  The window panel 5 is formed in a horizontally long substantially trapezoidal shape extending in the vehicle width direction across the left and right ends of the back door 1. The window panel 5 is fitted between the upper step portion 65 of the outer upper panel 61 and the lower step portion 71 of the outer lower panel 63 so as to close the window opening 19, and the upper extension piece 67 and the lower extension piece. 73 covers the openings of both inner pillars 29. The window panel 5 is bonded to the upper step portion 65 and the lower step portion 71 and the side portions of the inner flange 23 and the outer flange 27 with an adhesive 111 from the rear.

  A region corresponding to the window opening 19 in the window panel 5 is a transparent window region 5a, and a region located outside the window region 5a is a concealing region 5b concealed by a concealing layer made of black ceramics or the like. It has become. The window region 5 a of the window panel 5 constitutes the window portion 7 together with the window opening 19 of the inner panel 13. On the other hand, the concealment region 5 b of the window panel 5 includes portions corresponding to the upper step portion 65, the lower step portion 71, and the inner pillar portion 29. As a result, the bonded portion of the inner panel 13 and the outer panel 15 and the window panel 5 and the internal structure of the inner pillar portion 29 are not visible from the outside of the vehicle.

  Next, an assembling method of the back door 1 having the above configuration will be described with reference to FIGS. 6 (a) to 6 (c) and FIGS. 7 (a) and 7 (b). In order to assemble the back door 1, it is necessary to affix the reinforcing sheet 91 on the back surface of the outer lower panel 63 before assembling the outer lower panel 63 to the inner panel 13. 6A to 6C are process diagrams showing an operation of attaching the reinforcing sheet-like material 91 to the outer lower panel 63. FIG. FIGS. 7A and 7B are process diagrams showing the work of assembling the outer lower panel 63 to the inner panel 13.

  In the operation of attaching the reinforcing sheet-like object 91 to the outer lower panel 63, first, the reinforcing sheet-like object 91 is placed on the back surface of the outer lower panel 63, and the outer lower panel 63 protrudes into both side openings 97 of the reinforcing sheet-like object 91. By inserting the wall 89, the reinforcing sheet-like object 91 is aligned at a predetermined position on the outer lower panel 63. At this time, the upper edge portion of the reinforcing sheet-like product 91 is disposed in a portion along the portion to be bonded to the inner panel 13 at the upper edge portion of the outer lower panel 63. In addition, the lower edge portion of the reinforcing sheet-like object 91 is disposed in a portion along the planned adhesion portion with the inner panel 13 at the lower edge portion of the outer lower panel 63.

  Next, as shown in FIG. 6A, the adhesive 90 is discharged from the nozzle 301 while scanning the nozzle 301 of the bonding apparatus with respect to a portion where the reinforcing sheet 91 is to be bonded in the outer lower panel 63. Then, the adhesive 90 is applied to the pattern corresponding to the above-described streak-like adhesive portion 99 from above the reinforcing sheet-like material 91 so as to cover the reinforcing sheet-like material 91 with the planned bonding portion.

  Subsequently, the pressing sheet 113 is overlaid on the reinforcing sheet-like material 91 with the adhesive 90 interposed therebetween, and the pressing roller 303 is rolled on the pressing sheet 113, thereby, as shown in FIG. 6B, the pressing roller. The adhesive 90 is pressed against the reinforcing sheet-like material 91 side, that is, the outer lower panel 63 side through the pressing sheet 113 by the pressing force of 303. As a result, in the portion of the reinforcing sheet-like material 91 to which the adhesive 90 is applied, the adhesive 90 is filled into the mesh 93 and reaches the back surface of the outer lower panel 63 through the mesh 93, The twisted yarn 91a constituting the bonded portion is embedded in the adhesive 90.

  As the pressing sheet 113, for example, a sheet having excellent releasability such as coating of a pressing surface with a fluorine-based or silicone-based release agent is suitably used. Next, as shown in FIG. 6C, the pressing sheet 113 that is attached to the adhesive 90 and attached to the outer lower panel 63 is peeled off from the adhesive 90. After that, by curing the adhesive 90, a streak-like adhesive portion 99 is formed on the reinforcing sheet-like material 91, and the reinforcing sheet-like material 91 is entirely covered by the streaky adhesive portion 99 of the outer lower panel 63. Affixed to the back.

  In the operation of assembling the outer lower panel 63 to the inner panel 13, first, as shown in FIG. 7A, a bonding device is attached to a portion to be bonded to the outer lower panel 63 of the inner flange 23 and the outer flange 27 of the inner panel 13. The adhesive 70 is applied by discharging the adhesive 70 from the nozzle 305 while scanning the nozzle 305. At the same time, the adhesive 70 is also applied to the flange piece 55 of each lamp installation portion 49 over the entire circumference.

  Next, the outer lower panel 63 is positioned and overlapped with the lower half portion of the inner panel 13 by inserting the positioning convex portion 69 into the positioning hole 35 of the bridging piece 31, and as shown in FIG. 13 is pressed by the pressing jig 307 to the portion where the adhesive 70 is applied. Thereafter, by curing the adhesive 70, the outer lower panel 63 is bonded to the inner flange 23 and the outer flange 27 of the inner panel 13. At the same time, the flange piece 55 of the lamp installation part 49 of the inner panel 13 is adhered to the side frame-like adhesive part 99b of the streak-like adhesive part 99 of the reinforcing sheet-like material 91 by the adhesive 70, and this side frame-like adhesion. It adheres to the outer lower panel 63 via the part 99b.

  The work for assembling the outer upper panel 61 to the inner panel 13 is performed in the same procedure as the work for assembling the outer lower panel 63. That is, the adhesive 70 is applied to a portion of the inner flange 23 and the outer flange 27 of the inner panel 13 to be bonded to the outer upper panel 61, and then the outer upper panel 61 is extended upward to the upper end portion of the inner panel 13. The pieces 67 are aligned and overlapped, and are bonded by pressing the outer upper panel 61 to a portion of the inner panel 13 where the adhesive 70 is applied.

  Thereafter, the step portions 65 and 71 of the outer upper panel 61 and the outer lower panel 63 bonded to the inner panel 13 and the portions to be bonded to the window panel 5 among the inner flange 23 and the outer flange 27 of the inner panel 13. Then, the adhesive 111 is applied. Then, the window panel 5 is fitted between the step portions 65 and 71, and the inner panel 13, the outer upper panel 61, the outer lower panel 63 and the window panel 5 are bonded to each other with the adhesive 111.

  Finally, a latch is inserted into the internal space S of the door body 3 from the work opening 45 of the inner panel 13, and the latch is attached to the latch attachment portion 43. Further, after the rear lamp 11 is inserted into the lamp installation portion 49 from the outer lamp opening 87 and attached to the door body 3, the cover panel 58 is attached to the front side of the door body 4.

  Through the above operations, the back door 1 shown in FIG. 1 is assembled. The bonding operation of the window panel 5 may be performed in combination with the bonding operation of the outer upper panel 61 and the outer lower panel 63 and the inner panel 13 by previously applying the adhesive 111 to the window panel 5.

-Effect of Embodiment 1-
In FIG. 8, an example of sectional drawing about the mode of the lower part 3b at the time of the rear surface collision of the back door 1 is shown. According to the back door 1 according to the first embodiment, when the vehicle is hit by a collision accident such as a rear-end collision, the impact applied to the reinforcing sheet-like object 91 is dispersed throughout the lower portion 3b. The local stress concentration can be avoided from occurring on the object 91, and the reinforcing sheet 91 can be prevented from tearing. Therefore, even if both panels 13 and 63 constituting the lower portion 3b of the door body 3 are scattered due to a vehicle collision accident, a reinforcing sheet 91 may be left on the lower portion 3b as shown in FIG. It is possible to prevent a large hole from opening in the lower portion 3b.

<< Embodiment 2 of the Invention >>
The back door 1 according to the second embodiment is different from the first embodiment in the configuration of the lower portion 3 b of the door body 3. In each of the following embodiments, the back door 1 is configured in the same manner as in the first embodiment except that the configuration of the lower portion 3b of the door main body 3 is different from that in the first embodiment. Only the different parts of the configuration of 3b will be described, and the same components are left to the description of the first embodiment based on FIGS. 1 to 8, and the detailed description thereof is omitted.

  FIG. 9 shows an exploded perspective view of the outer lower panel 63 constituting the lower portion 3b of the back door 1 according to the second embodiment, the reinforcing sheet-like material 91 and the pressing sheet 113 attached thereto. In FIG. 10, the figure which looked at these outer lower panels 63, the reinforcement sheet-like thing 91, and the press sheet | seat 113 from the inner panel 13 side is shown. FIG. 11 is a cross-sectional view of the lower portion 3b of the back door 1 at a location corresponding to the line XI-XI in FIG. FIG. 12A shows a cross-sectional view of the outer lower panel 63, the reinforcing sheet-like material 91, and the pressing sheet 113 along the line XIIa-XIIa in FIG. In FIG. 10, the illustration of the substantially left half of the pressing sheet 113 is omitted.

  In the back door 1 of the present embodiment, as shown in FIGS. 9 to 11, an adhesive 90 that forms the streak-like adhesive portion 99 of the reinforcing sheet 91 is applied to the back surface of the outer lower panel 63. The pressing sheet 113 used to press the outer sheet panel 63 via the adhesive is overlapped on the inner panel 13 side of the reinforcing sheet material 91 with the adhesive 90 of the streak-like adhesive portion 99 of the reinforcing sheet material 91. It is pasted. As shown in FIG. 12A, the pressing sheet 113 adheres to the adhesive 90 by pressing with the pressing roller 303, and the reinforcing sheet 91 and the outer sheet 63 remain attached to the outer lower panel 63 in FIG. As shown, it is provided in the internal space S of the lower portion 3 b of the door body 3.

  The pressing sheet 113 has a size corresponding to the entire reinforcing sheet-like material 91 and is formed in the same shape or a similar shape as the reinforcing sheet-like material 91. An opening 115 having the same size and shape as the center opening 95 is formed in a portion of the pressing sheet 113 corresponding to the center opening 95 of the reinforcing sheet-like material 91. Further, openings 117 having the same size and shape as the side openings 97 are formed in portions of the pressing sheet 113 corresponding to the side openings 97 of the reinforcing sheet-like material 91. As shown in FIG. 12A, the pressing sheet 113 is a resin sheet having heat insulation properties, and is made of a foamed resin such as polyurethane or polyethylene. The thickness of the pressing sheet 113 is, for example, about 1.0 mm to 5.0 mm.

-Effect of Embodiment 2-
According to the back door 1 according to the second embodiment, since the heat-insulating resin sheet is employed for the pressing sheet 113, the heat insulating property of the pressing sheet 113 is added to the back door 1. The heat insulation performance can be improved. Further, since the pressing sheet 113 is left attached to the outer lower panel 63 together with the reinforcing sheet-like object 91, the work of peeling the pressing sheet 113 does not have to be performed, and the reinforcing sheet-like substance 91 is removed from the outer lower panel. It can be easily bonded to 63.

<Modification 1 of Embodiment 2>
FIG. 12B is a view corresponding to FIG. 12A of the back door 1 according to the first modification. In the second embodiment, the pressing sheet 113 is a resin sheet having a heat insulating property. However, the pressing sheet 113 of the present modification has both a heat insulating property and a soundproofing property as shown in FIG. A fiber sheet made of cotton-like material such as glass wool or rock wool. The thickness of the pressing sheet 113 is, for example, about 1.0 mm to 10.0 mm.

  According to the back door 1 according to the modified example 1, since the fiber sheet having heat insulating properties and soundproofing properties is adopted for the pressing sheet 113, the heat insulating properties and soundproofing properties of the pressing sheet 113 are added to the back door 1. In addition, both the heat insulation performance and soundproof performance of the back door 1 can be improved.

<Modification 2 of Embodiment 2>
FIG. 12C shows a view corresponding to FIG. 12A of the back door 1 according to the second modification. In the said Embodiment 2 and its modification 1, although the press sheet 113 was supposed to have heat insulation and soundproofing property, as shown in FIG.12 (c), the press sheet 113 of this modification is extensibility and tensile strength. Is a tough resin sheet.

  According to the back door 1 according to the second modified example, a tough resin sheet is adopted as the pressing sheet 113, so that the impact resistance at the lower portion 3b of the door body 3 can be enhanced by the pressing sheet 113. It is possible to further prevent the reinforcing sheet-like material 91 from being split by the overlapping structure with the reinforcing sheet-like material 91.

<Modification 3 of Embodiment 2>
FIG. 12D is a view corresponding to FIG. 12A of the back door 1 according to the third modification. As shown in FIG. 12 (d), the pressing sheet 113 of this modification is a composite sheet having electromagnetic wave shielding properties composed of a resin sheet 121 on which an aluminum foil 119 is laminated. The pressing sheet 113 may be the aluminum foil 119 itself.

  According to the back door 1 according to the modified example 3, since the sheet having the electromagnetic wave shielding property is adopted as the pressing sheet 113, the electromagnetic wave shielding property of the pressing sheet 113 is added to the back door 1, and the back door 1 itself In addition, it is possible to prevent malfunction of electronic devices mounted on the vehicle due to external electromagnetic waves.

<< Embodiment 3 of the Invention >>
FIG. 13 is a view corresponding to FIG. 4 of the back door 1 according to the third embodiment. FIG. 14 is a cross-sectional view of the back door 1 taken along the line XIV-XIV in FIG. In the first embodiment, the center frame-shaped adhesive portion 99a and the side frame-shaped adhesive portion 99b are formed by the combination of the transverse adhesive portion 101 and the longitudinal adhesive portion 105, but the center frame-shaped adhesive portion of the third embodiment is used. The part 99a and the side frame-shaped adhesive part 99b are provided separately from the transverse adhesive part 101 and the longitudinal adhesive part 105.

  Specifically, the transverse adhesive portion 101 includes a first transverse adhesive portion 101a that adheres the upper edge portion of the reinforcing sheet 91 at a portion along the upper edge adhesive portion 3x of the door body 3 lower portion 3b, and a center opening. 95 and the second transverse adhesive portion 101b for bonding the reinforcing sheet-like material 91 at a position spaced downward from the side opening 97, and the lower edge portion of the reinforcing sheet-like material 91 as the lower edge of the door body 3 lower portion 3b It is comprised with the 3rd crossing adhesion part 101c adhere | attached in the part along the adhesion part 3y. These first to third transverse adhesive portions 101a, 101b, and 101c respectively adhere the reinforcing sheet-like material 91 to the outer lower panel 63 over substantially the entire vehicle width direction.

  The longitudinal adhesive portion 105 includes a first longitudinal adhesive portion 105a that adheres the right edge of the reinforcing sheet-like material 91 at a portion along the right side edge adhesive portion 3z of the door body 3 lower portion 3b, and a right side opening 97. The reinforcing sheet 91 is bonded at the intermediate position between the center opening 95 and the left side opening 97, and the second longitudinal bonding portion 105b for bonding the reinforcing sheet 91 at an intermediate position between the center opening 95 and the center opening 95. And a fourth longitudinal adhesive portion 105d for adhering the left side edge of the reinforcing sheet-like material 91 at a portion along the left side edge adhesive portion 3z of the door body 3 lower portion 3b. ing. The first longitudinal adhesive portion 105 a and the fourth longitudinal adhesive portion 105 d are interrupted at the peripheral portion of the side opening 97. The second longitudinal adhesive portion 105b and the third longitudinal adhesive portion 105c adhere the reinforcing sheet 91 to the outer lower panel 63 over substantially the entire vertical direction.

  The pressing sheet 113 of the present embodiment has a shape different from that of the reinforcing sheet-like material 91 in that the size of the center opening 95 of the reinforcing sheet-like material 91 and the size of the corresponding opening 115 are different, and further, a notch 123 is formed. Have.

  Specifically, an opening 115 that is slightly larger than the center opening 95 is formed in a portion of the pressing sheet 113 corresponding to the center opening 95 of the reinforcing sheet-like material 91. The peripheral part of the center opening 95 in the reinforcing sheet-like material 91 is exposed forward from the pressing sheet 113 inside the opening 115.

  Further, a portion of the pressing sheet 113 corresponding to each side opening 97 of the reinforcing sheet-like material 91 is formed with a notch 123 that is slightly larger than the side opening 97 and opened to the outside in the vehicle width direction. Yes. The peripheral portion of each side opening 123 in the reinforcing sheet-like material 91 is exposed forward from the pressing sheet 113 inside the corresponding notch 123.

  The periphery of the center opening 95 of the reinforcing sheet 91 is directly bonded to the inner panel 13 with the adhesive 70 to form a rectangular frame-shaped center frame bonding portion 99a surrounding the center opening 95. Yes. Further, the peripheral portion of each side opening 97 in the reinforcing sheet-like material 91 is directly bonded with the flange piece 55 of the corresponding lamp installation portion 49 by the adhesive 70, and has a rectangular frame shape surrounding the side opening 97. The side frame-shaped adhesive portion 99b is used.

  In order to assemble the back door 1 having the above-described configuration, in the operation of attaching the reinforcing sheet 91 to the outer lower panel 63, an adhesive is provided around the center opening 95 and the side openings 97 of the reinforcing sheet 91. 90 is not applied, and the peripheral portions of these openings 95 and 97 in the reinforcing sheet 91 are left unbonded. In the operation of assembling the outer lower panel 63 to the inner panel 13, the adhesive 70 is applied to the inner panel 13 corresponding to the peripheral portion of the center opening 95 and the flange piece 55 of each lamp installation portion 49. The agent 70 is pressed against the outer lower panel 63 with the periphery of the center opening 95 and the side openings 97 of the reinforcing sheet-like material 91 sandwiched therebetween and cured in this state, whereby the center frame-shaped adhesive portion 99a and the side frame-shaped adhesive portion 99b is formed, and the outer lower panel 63 is directly bonded to the inner panel 13 by the two frame-shaped bonding portions 99a and 99b.

-Effect of Embodiment 3-
Even with the back door 1 according to the third embodiment, the same effect as that of the first embodiment is obtained, and even if both panels 13 and 63 constituting the lower portion 3b of the door body 3 are scattered due to a vehicle collision accident, Since the reinforcing sheet-like material 91 can be left in the lower portion 3b, it is possible to prevent a large hole from being opened in the lower portion 3b.

  In the first to third embodiments, three or four cross-bonding portions 101 and four or six longitudinal bond portions 105 and three oblique crossings of the streak-like bonding portion 99 of the reinforcing sheet-like material 91 are used. Although the form which is a combination pattern with the adhesion part 107 was illustrated, this invention is not limited to this. For example, instead of the oblique adhesive portion 107, only one oblique line portion 107x, 107y that forms the oblique adhesive portion 107 may be provided. Further, the streak-like adhesive portion 99 may be formed in a lattice shape only by the transverse adhesive portion 101 and the longitudinal adhesive portion 105, and the connecting adhesive portion 103 including the transverse adhesive portion 101 and a diagonal line portion extending obliquely thereto. It may be formed only by. There may be two or more transverse adhesive portions 101, and the connecting adhesive portion 103 may be either one or plural.

  In the first to third embodiments, the reinforcing sheet-like object 91 is a net-like member made of a rectangular no-node network. However, the present invention is not limited to this, and the reinforcing sheet-like object 91 is made of a knot-like net. It does not matter. The reinforcing sheet-like material 91 may be a knitted or woven fabric made of fibers, or may be a resin sheet. In this case, in order to affix the reinforcing sheet-like material 91 to the outer lower panel 63, the adhesive 90 may be applied to the outer lower panel 63, placed on the adhesive 90, and bonded to the outer lower panel 63. Further, the reinforcing sheet-like object 91 may be formed in other shapes such as a trapezoidal shape. As the reinforcing sheet-like material 91, 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 2 and its modification 1-3, what has heat insulation, sound insulation, and electromagnetic wave shielding property is employ | adopted for the press sheet 113, but this invention is not limited to this, As the press sheet 113 By using a composite sheet made by laminating an aluminum foil on the surface of a resin sheet having at least one of heat insulation and sound insulation, it is possible to add electromagnetic shielding properties to the back door 1 as well as heat insulation and sound insulation. It is also possible to do.

  In the first to third embodiments, the outer panel 15 is configured by two divided bodies of the outer upper panel 61 and the outer lower panel 63. However, the present invention is not limited thereto, and the outer panel 15 is a single piece. The panel may be configured. In this case, the outer panel 15 has, for example, a structure in which a middle panel in which a window opening is formed between the outer upper panel 61 and the outer lower panel 63 is provided, and is manufactured by integrally molding these three members. The

  As mentioned above, although preferable embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in each said embodiment. It is to be understood by those skilled in the art that the above-described embodiments are exemplifications, and that various modifications can be made to combinations of the respective constituent elements, and such modifications are also within the scope of the present invention.

  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-end collision of the vehicle, the lower portion is greatly affected. It is suitable for a vehicle back door that is desired to prevent the hole from opening.

DESCRIPTION OF SYMBOLS 1 ... Back door, 3 ... Door main body, 3a ... Upper part, 3b ... Lower part, 3x ... Upper edge adhesion part,
3y ... lower edge adhesion portion, 3z ... side edge adhesion portion, 5 ... window panel, 5a ... window region, 5b ... concealment region,
7 ... Window part, 9 ... Plate mounting part, 11 ... Rear lamp, 13 ... Inner panel,
15 ... Outer panel, 17 ... Main body, 19 ... Window opening, 21 ... Inside standing wall,
23 ... Inner flange, 25 ... Outer standing wall, 27 ... Outer flange, 29 ... Inner pillar part,
29a ... outer wall, 29b ... inner wall, 31 ... bridging piece, 33 ... positioning hole, 35 ... fastening hole,
37: Storage unit, 37A: Lower storage part, 37B: Upper storage part,
39 ... Plate fastening surface portion, 41 ... Vertical wall portion, 43 ... Latch mounting portion, 45 ... Working opening,
47 ... Component mounting recess, 49 ... Lamp installation part, 51 ... Opening, 53 ... Frame-like standing wall,
55 ... Flange piece, 57 ... Inner side lamp opening, 58 ... Cover panel,
59 ... Hinge mounting part, 61 ... Outer upper panel, 63 ... Outer lower panel,
65 ... Upper stepped portion, 67 ... Upper extending piece, 68 ... Positioning convex portion, 69 ... Insertion hole,
70 ... Adhesive (elastic adhesive), 71 ... Lower step, 73 ... Lower extension piece,
77 ... Plate mounting seat, 78 ... Side wall, 79 ... Upper wall, 81 ... Plate mounting hole,
83 ... Knob opening, 85 ... Floodlight opening, 87 ... Outer lamp opening, 89 ... Projection wall,
90 ... adhesive (elastic adhesive), 91 ... reinforcing sheet, 91a ... twisted yarn, 93 ... mesh,
95 ... Center opening, 97 ... Side opening, 99 ... Straight adhesion part,
99a ... center frame-like adhesive part, 99b ... side frame-like adhesive part, 101 ... transverse adhesive part,
103 ... Linked adhesive part, 101a ... First transverse adhesive part, 101b ... Second transverse adhesive part,
101c ... 3rd transverse adhesive part, 101d ... 4th transverse adhesive part, 105 ... Longitudinal adhesive part,
105a ... 1st longitudinal adhesion part, 105b ... 2nd longitudinal adhesion part, 105c ... 3rd longitudinal adhesion part,
105d ... 4th longitudinal adhesive part, 105e ... 5th longitudinal adhesive part, 105f ... 6th longitudinal adhesive part,
107: Obliquely bonded portion, 107a: First obliquely bonded portion, 107b: Second obliquely bonded portion,
107c: third oblique adhesion portion, 107x: first oblique portion, 107y: second oblique portion,
109 ... Non-adhesive part, 111 ... Adhesive (elastic adhesive), 113 ... Press sheet,
115, 117 ... opening, 119 ... aluminum foil, 121 ... resin sheet, 201 ... body body,
203 ... back door opening, 301 ... nozzle, 303 ... pressing roller, 305 ... nozzle,
307 ... Pressing jig

Claims (4)

It is composed of a resin inner panel (13) and a resin outer panel (15) bonded to face each other, and includes a door body (3) having an internal space (S) between these two panels (13, 15).
A vehicle back door provided with an opening for a window (19) in an upper half portion of the door body (3),
The inner panel (13) and the outer panel (15) are bonded with an adhesive (70) having rubber elasticity,
In the internal space (S) of the lower part (3b) located below the window opening (19) in the door body (3), a reinforcing sheet-like material (91) having stretchability is provided. Provided in an expanded state corresponding to the back surface of the outer panel (15),
The outer panel (15) has openings (83, 85, 87) in the lower part (3b),
The reinforcing sheet-like material (91) includes an opening (95, 97) corresponding to the opening (83, 85, 87) of the outer panel (15) and an adhesive having rubber elasticity on the back surface of the outer panel (15) ( a stripe-like bonding portion bonded to streak at 90) and (99),
The streak-shaped adhesive portion (99) is arranged such that at least the upper edge side portion and the lower edge side portion of the lower portion (3b) and the portion between the upper and lower edge side portions of the reinforcing sheet-like material (91) in the vehicle width direction Formed by a transverse adhesive portion (101) that adheres to each other and a connecting adhesive portion (103) that connects the transverse adhesive portions (101) to each other, and the openings (95, 97) of the reinforcing sheet-like material (91) A vehicular back door characterized in that a frame-like adhesive portion (99a, 99b) surrounding the opening (95, 97) is formed in the peripheral portion . In the vehicle back door according to claim 1,
The streak-like adhesive part (99) divides the reinforcing sheet-like material (91) into a plurality of non-adhesive parts (109) by the transverse adhesive part (101) and the connecting adhesive part (103). Vehicle back door. In the vehicle back door according to claim 1 or 2 ,
The back panel for a vehicle according to claim 1, wherein the outer panel (15) is also bonded to the inner panel (13) at the frame-shaped bonding portions (99a, 99b). It is composed of a resin inner panel (13) and a resin outer panel (15) bonded to face each other, and includes a door body (3) having an internal space (S) between these two panels (13, 15).
A vehicle back door provided with an opening for a window (19) in an upper half portion of the door body (3),
The inner panel (13) and the outer panel (15) are bonded with an adhesive (70) having rubber elasticity,
In the internal space (S) of the lower part (3b) located below the window opening (19) in the door body (3), a reinforcing sheet-like material (91) having stretchability is provided. Provided in an expanded state corresponding to the back surface of the outer panel (15),
The reinforcing sheet-like material (91) is a net-like member having a large number of meshes (93), and is a streak bonded to the back surface of the outer panel (15) with a rubber elastic adhesive (90). Shaped adhesive part (99)
The streak-shaped adhesive portion (99) is arranged such that at least the upper edge side portion and the lower edge side portion of the lower portion (3b) and the portion between the upper and lower edge side portions of the reinforcing sheet-like material (91) in the vehicle width direction And a connecting adhesive portion (103) for connecting the transverse adhesive portions (101) to each other, and the adhesive (90) from the inner panel (13) side. And the adhesive (90) is adhered to the outer panel (15) through the mesh (93) of the reinforcing sheet (91), thereby being adhered to the outer panel (15),
On the inner panel (13) side of the reinforcing sheet-like material (91), an adhesive (90) corresponding to the reinforcing sheet-like material (91) is applied to the outer panel (15). The pressing sheet (113) used to press the side is attached with the adhesive (90) of the streak-like adhesive portion (99),
The back door for a vehicle according to claim 1, wherein the pressing sheet (113) has at least one of a heat insulating property, a soundproofing property, and an electromagnetic wave shielding property.

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