JP6862623B2 - Vehicle backdoor - Google Patents

Description

The present invention relates to a vehicle back door including an inner panel made of synthetic resin, an outer panel joined to the inner panel, and a back window joined to the outer panel as components.

In order to reduce the weight of the vehicle and the manufacturing cost, a back door made of synthetic resin is known instead of the conventional sheet metal. The back door has an inner panel and an outer panel manufactured by injection molding as constituent elements, and the outer panel is bonded to the inner panel with an adhesive. When the outer panel is joined to the inner panel, if the accuracy of positioning the outer panel with respect to the inner panel is low, there is a concern that the joint portion may be displaced and the installation of the back door may be deteriorated.

Under these circumstances, for example, Patent Document 1 discloses a back door made of synthetic resin capable of improving the positioning accuracy of the inner panel and the outer panel. The inner panel of the back door is provided with a protrusion that protrudes toward the outside of the passenger compartment. Further, the outer panel (outer lower) of the back door is provided with a hole into which the protrusion is fitted. By adopting such a configuration, it is possible to improve the accuracy of positioning the outer panel with respect to the inner panel.

Here, when the positioning structure of the outer panel disclosed in Patent Document 1 is applied, when the protrusions come into contact with each other over the entire peripheral surface of the holes, the frictional force between the holes and the protrusions increases, so that the inner panel is contacted. It becomes difficult to make fine adjustments to the outer panel. In order to make fine adjustment, it is desirable to reduce the contact area between the protrusion and the hole by making the shape of the protrusion cross-shaped to reduce the frictional force between the hole and the protrusion. .. In this case, a gap is formed between the protrusion and the hole.

Further, in the back door disclosed in Patent Document 1, when the back window is damaged due to a collision or the like, a glass piece enters the inside of the back door from the side portion of the inner panel (the portion overlapping the left and right ends of the back window). .. Since it is difficult to remove the glass pieces that have entered the inside of the back door unless the outer panel is removed, the usability and repairability of the back door are reduced. Under these circumstances, for example, according to the synthetic resin back door disclosed in Patent Document 2, the outer panel covers the side portion of the inner panel, and the back window is joined to the outer panel. By adopting such a configuration, it is possible to prevent the glass piece of the back window from entering the inside of the back door.

Here, when the positioning structure disclosed in Patent Document 1 is applied to the back door disclosed in Patent Document 2, it is necessary to apply the structure to the side portion of the inner panel having relatively high rigidity. It is also desirable from the viewpoint of securing. In this case, if a gap is formed between the protrusion and the hole in order to enable fine adjustment of the outer panel with respect to the inner panel, there is a concern that the glass piece of the back window may enter through the gap. ..

Japanese Unexamined Patent Publication No. 2013-22785 Japanese Unexamined Patent Publication No. 2016-20792

In view of the above circumstances, it is an object of the present invention to provide a vehicle back door capable of preventing a glass piece of the back window from entering the inside of the back door while improving the positioning accuracy of the outer panel with respect to the inner panel. And.

The vehicle back door provided by the present invention is a vehicle back door that includes an inner panel made of synthetic resin, an outer panel joined to the inner panel, and a back window joined to the outer panel as components. The inner panel includes an inner opening leading to the back window and a pair of side portions located on the left and right sides of the inner opening and opened toward the rear of the vehicle. Is arranged with a connecting piece having a bottom portion facing the rear of the vehicle, a box frame portion surrounding the peripheral edge of the bottom portion, and a protrusion protruding from the bottom toward the rear of the vehicle, and the protrusion is in the axial direction thereof. The outer panel has a plurality of peripheral surfaces that are oriented in intersecting directions and are separated from each other in the axial direction, and the outer panel is recessed from the joint surface to which the back window is joined toward the inside of the side portion. An entry portion is formed, and a reference hole is formed in the indentation portion through which the protrusion portion of the connecting piece is inserted while penetrating in the front-rear direction of the vehicle. The housing portion formed of the bottom portion and the box frame portion of the connecting piece is closed by the recessed portion.

In the vehicle back door according to the present invention, a connecting piece having a protrusion is arranged on the side portion of the inner panel, and the outer panel is formed with a reference hole in a recessed portion recessed toward the inside of the side portion. .. The protrusions and reference holes constitute the positioning structure of the outer panel with respect to the inner panel. When the protrusion is inserted into the reference hole, the peripheral surface of the protrusion comes into contact with the edge of the reference hole, and a gap is formed between the two adjacent peripheral surfaces. By adopting such a configuration, the frictional force between the protrusion and the reference hole is reduced, and fine adjustment of positioning becomes easier. Further, the accommodating portion composed of the bottom portion and the box frame portion of the connecting piece is closed by the indentation portion. With such a configuration, when the back window is damaged, the glass pieces that have entered the gap are captured by the accommodating portion. Therefore, according to the vehicle back door according to the present invention, it is possible to prevent the glass piece of the back window from entering the inside of the back door while improving the positioning accuracy of the outer panel with respect to the inner panel.

Other features and advantages of the present invention will become more apparent with the detailed description given below based on the accompanying drawings.

It is an exploded perspective view of the back door for a vehicle which concerns on one Embodiment of this invention. It is a front view (a view seen from the rear of a vehicle) of the inner panel which constitutes the back door shown in FIG. It is sectional drawing which follows the line III-III of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is sectional drawing which follows the VI-VI line of FIG. It is a partially enlarged view of FIG. 2 (near the left side portion). It is a partially enlarged view (near the connecting piece) of FIG. It is a partially enlarged front view of the back door shown in FIG. 1 (near the left side portion of the inner panel). 9 is a partially enlarged front view showing a state when the back window and the upper panel are removed with respect to FIG. 9. It is a partially enlarged view of FIG. 9 (near the recessed portion of the upper panel of the outer panel). It is sectional drawing which follows the XII-XII line of FIG.

An embodiment for carrying out the present invention (hereinafter referred to as “embodiment”) will be described with reference to the accompanying drawings.

A vehicle back door (hereinafter referred to as “back door A10”) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 12. For convenience of understanding, FIGS. 9 and 11 pass through the back window 30 (details will be described later).

Here, for convenience of explanation, up in each figure is the vehicle upward direction, dw is the vehicle downward direction, fr is the vehicle front direction, rr is the vehicle rear direction, rh is the vehicle right direction, and lh is the vehicle left direction. In the following explanation, "front and back", "up and down" and "left and right" are used without particular, "front and back" refers to front and rear in the vehicle front and rear direction, and "up and down" refers to up and down in the vehicle vertical direction. "Left and right" shall refer to the left and right in the vehicle left and right direction (vehicle width direction).

The back door A10 is arranged so as to close the rear opening of the vehicle, and includes an inner panel 10, an outer panel 20, and a back window 30 as components, as shown in FIG. The inner panel 10 is located in front of the vehicle and inside the vehicle, and is made of synthetic resin. The inner panel 10 is made of polypropylene (PP) containing glass fiber (GF), and is integrally molded by injection molding. The color of the inner panel 10 is grayish white. The outer panel 20 is located at the rear of the vehicle and outside the vehicle, and is joined to the inner panel 10. The outer panel 20 according to the present embodiment is made of synthetic resin and has a configuration in which the upper panel 20a and the lower panel 20b are vertically separated. The back window 30 is located behind the vehicle and outside the vehicle with respect to the outer panel 20, and is joined to the outer panel 20. The back window 30 is made of glass.

As shown in FIG. 2, the inner panel 10 includes an inner opening 11, a pair of side portions 12, an opening upper side portion 13 and a hem portion 14. The strength and rigidity (bending and twisting) of the inner panel 10 are set higher than the strength and rigidity of the outer panel 20.

As shown in FIG. 2, the inner opening 11 is an opening area surrounded by a pair of side portions 12, an opening upper side portion 13 and a hem portion 14. The inner opening 11 communicates with the back window 30 in the front-rear direction of the vehicle via the outer opening 21 (details will be described later) of the outer panel 20.

As shown in FIG. 2, the inner edges of the pair of side portions 12, the opening upper side portion 13 and the hem portion 14 adjacent to the inner opening 11 project toward the inner opening 11 in the vehicle vertical direction and the vehicle width direction. The inner peripheral flange 151 is formed. The inner peripheral flange 151 surrounds the inner opening 11. Further, as shown in FIG. 2, an outer peripheral flange 152 is formed on the outer edges of the pair of side portions 12 and the hem portion 14 so as to project toward the outside of the inner panel 10 in the vehicle width direction and below the vehicle. The outer panel 20 is joined to the inner panel 10 by abutting the outer panel 20 against the rear surfaces (front surface of the inner panel 10) of the inner peripheral flange 151 and the outer peripheral flange 152. For joining, for example, a polyurethane adhesive is used.

As shown in FIG. 2, the pair of side portions 12 are located on both the left and right sides of the inner opening 11, and extend in the vertical direction of the vehicle. The pair of side portions 12 form a pillar structure in the inner panel 10. The pair of side portions 12 connect the opening upper side portion 13 and the hem portion 14. As shown in FIG. 3, the side portion 12 has a bottom surface 121 and a pair of inner side surfaces 122.

As shown in FIG. 3, the bottom surface 121 is arranged along the vehicle vertical direction and the vehicle width direction, and faces the rear of the vehicle. The pair of inner side surfaces 122 are connected to the left and right ends of the bottom surface 121 and project toward the rear of the vehicle. The pair of inner side surfaces 122 face each other in the vehicle width direction. The rear end of one inner side surface 122 is connected to the inner peripheral flange 151. The rear end of the other inner side surface 122 is connected to the outer peripheral flange 152. Therefore, the cross-sectional shape of the side portion 12 including the inner peripheral flange 151 and the outer peripheral flange 152 is a hat shape that opens toward the rear of the vehicle.

As shown in FIGS. 2 and 7, the connecting piece 16 is a member arranged on the side portion 12 and connecting the pair of inner side surfaces 122. The connecting piece 16 is integrally molded in the inner panel 10 together with the side portion 12. In the present embodiment, the connecting pieces 16 are arranged one above and one below each side portion 12.

As shown in FIG. 8, the connecting piece 16 has a bottom portion 161, a box frame portion 162, and a protrusion portion 163. The bottom portion 161 is a portion facing the rear of the vehicle. The box frame portion 162 is a portion that surrounds the peripheral edge of the bottom portion 161 and projects toward the rear of the vehicle. The box frame portion 162 is formed with a fastening hole 162a that opens toward the rear of the vehicle. When the outer panel 20 is joined to the inner panel 10, the fastening member 29 (details will be described later) is inserted into the fastening hole 162a from the rear of the vehicle. In the connecting piece 16, the accommodating portion 164 is composed of the bottom portion 161 and the box frame portion 162. The accommodating portion 164 is a hollow region that opens toward the rear of the vehicle. The protrusion 163 is a portion that protrudes from the bottom 161 toward the rear of the vehicle. In the present embodiment, the protrusion 163 has a cross shape when viewed from the rear of the vehicle. The protruding amount of the protruding portion 163 is set to be larger than the protruding amount of the box frame portion 162. The front end of the protrusion 163 connected to the bottom portion 161 is surrounded by the box frame portion 162 and is accommodated in the accommodating portion 164.

As shown in FIG. 8, the protrusion 163 has a plurality of peripheral surfaces 163a. Each peripheral surface 163a faces a direction that intersects the axial direction (vehicle front-rear direction) of the protrusion 163. The plurality of peripheral surfaces 163a are separated from each other in the axial direction (circumferential direction of the protrusion 163). In this embodiment, the number of peripheral surfaces 163a is four. The peripheral surface 163a has a first region 163b that faces a direction orthogonal to the axial direction of the protrusion 163 (the radial direction of the protrusion 163) and a first region 163b that has a taper inclined with respect to the axial direction. It has a second region 163c extending from the protrusion 163 toward the rear end. The connecting piece 16 is formed with a partition wall 165 extending from each first region 163b to the box frame portion 162. The front end of the bulkhead 165 is connected to the bottom 161. In the present embodiment, the partition wall 165 divides the accommodating portion 164 into four.

As shown in FIG. 2, the upper side portion 13 of the opening is located above the inner opening 11 and extends in the vehicle width direction. The upper side portion 13 of the opening constitutes a beam structure in the inner panel 10. A pair of door hinge mounting portions 131 are provided on the opening upper side portion 13. The pair of door hinge mounting portions 131 are located at both left and right ends of the opening upper side portion 13. A door hinge (not shown) is attached to each door hinge mounting portion 131 from the front of the vehicle, and a steel door hinge reinforcing material (not shown) is attached from the rear of the vehicle. The back door A10 is connected to the upper edge of the rear opening of the vehicle via a pair of left and right door hinges. Therefore, the back door A10 can be rotated around the upper edge of the rear opening of the vehicle by the door hinge. By this rotation, the back door A10 is opened and closed.

As shown in FIG. 2, the hem portion 14 is located below the inner opening 11 of the vehicle. The hem portion 14 constitutes a plate structure in the inner panel 10. The hem portion 14 has an opening lower side portion 141, a pair of connecting portions 142, and a frame portion 143.

As shown in FIG. 2, the lower side portion 141 of the opening is a portion located at the upper end of the hem portion 14 and extending in the vehicle width direction. As shown in FIG. 5, a peripheral groove 144 opened toward the rear of the vehicle is formed in the lower side portion 141 of the opening. The peripheral groove 144 has a bottom surface 144a that is arranged along the vehicle vertical direction and the vehicle width direction and faces the rear of the vehicle.

As shown in FIG. 2, the pair of connecting portions 142 are located on both the left and right sides of the lower side portion 141 of the opening, and the lower ends of the side portions 12 are connected to each other. A damper stay (not shown) is attached to each connecting portion 142 from the front of the vehicle, and a steel door stay reinforcing material (not shown) is attached from the rear of the vehicle. As shown in FIG. 4, the cross-sectional shape of the connecting portion 142 including the inner peripheral flange 151 and the outer peripheral flange 152 is a hat shape that opens toward the rear of the vehicle. Based on such a hat-shaped cross section, the connecting portion 142 is formed with a peripheral groove 144 that opens toward the rear of the vehicle.

As shown in FIG. 2, the frame portion 143 is a portion that is located at the lower end and the left and right ends of the hem portion 14 and is connected to the pair of connecting portions 142. As shown in FIGS. 5 and 6, the frame portion 143 is formed with a peripheral groove 144 that opens toward the rear of the vehicle, like the opening lower side portion 141 and the pair of connecting portions 142. In the lower side portion 141 of the opening, the pair of connecting portions 142, and the frame portion 143, the peripheral groove 144 is formed in a continuous frame shape (square shape) when viewed from the rear of the vehicle. A latch mounting portion 143a is mounted at the center of the lower end of the frame portion 143. In the back door A10, the rear opening of the vehicle is opened by engaging the latch (not shown) attached to the latch mounting portion 143a with the striker (not shown) provided at the lower edge of the rear opening of the vehicle. The closed state is maintained by.

As shown in FIGS. 2, 5 and 6, in the region surrounded by the peripheral groove 144 in the hem portion 14, a box-shaped bulging portion that bulges toward the rear of the vehicle with respect to the bottom surface 144a of the peripheral groove 144. 145 is formed. The box-shaped bulging portion 145 has a bulging surface 145a that faces the rear of the vehicle and is along the vehicle vertical direction and the vehicle width direction. When the outer panel 20 is joined to the inner panel 10, the box-shaped bulging portion 145 comes into contact with the outer panel 20 via an adhesive (for example, a polyurethane-based adhesive) applied to the bulging surface 145a. The box-shaped bulging portion 145 is formed with a pair of concave grooves 146 that are recessed from the bulging surface 145a toward the front of the vehicle and open toward the rear of the vehicle. The cross-sectional shape of the concave groove 146 is a groove shape (U-shaped). The pair of concave grooves 146 extend obliquely upward with respect to the vehicle width direction from both the left and right sides of the latch mounting portion 143a and reach the pair of connecting portions 142.

As shown in FIG. 1, the outer panel 20 is composed of an upper panel 20a and a lower panel 20b separated vertically in the present embodiment. When the upper panel 20a and the lower panel 20b are joined to the inner panel 10, an outer opening 21 located between the inner opening 11 of the inner panel 10 and the back window 30 is formed in the outer panel 20.

As shown in FIG. 1, the upper panel 20a is a portion located in the upper half of the outer panel 20. When the upper panel 20a is joined to the inner panel 10, the upper half of the pair of side portions 12 and the opening upper side portion 13 are closed by the upper panel 20a from the rear of the vehicle.

As shown in FIG. 1, the upper panel 20a includes a pair of upper arm portions 221 located on the left and right sides of the outer opening 21. The upper arm portion 221 extends downward toward the vehicle. As shown in FIG. 9, the upper arm portion 221 has a joint surface 23a facing the rear of the vehicle. An adhesive (for example, a polyurethane adhesive) for joining the back window 30 to the upper panel 20a is applied to the joint surface 23a. A rectangular flange 241 is formed at the lower end of the upper arm portion 221 when viewed from the rear of the vehicle.

As shown in FIG. 1, the lower panel 20b is a portion located in the lower half of the outer panel 20. When the inner panel 10 is joined to the lower panel 20b, the lower half of the pair of side portions 12 and the hem portion 14 are closed by the lower panel 20b from the rear of the vehicle.

As shown in FIG. 1, the lower panel 20b includes a pair of lower arm portions 222 located on the left and right sides of the outer opening 21. The lower arm portion 222 extends upward toward the vehicle. As shown in FIGS. 9 and 10, the lower arm portion 222 has a joint surface 23b facing the rear of the vehicle. An adhesive for joining the back window 30 to the lower panel 20b (same as the adhesive applied to the joint surface 23a) is applied to the joint surface 23b. As shown in FIG. 10, a butt portion 242 recessed from the joint surface 23b is formed at the upper end of the lower arm portion 222. The flange 241 of the upper panel 20a engages with the butt portion 242 from the rear of the vehicle. Therefore, in the present embodiment, as shown in FIG. 10, the lower panel 20b is first joined to the inner panel 10, then the upper panel 20a is joined to the inner panel 10 and the outer panel is joined as shown in FIG. The back window 30 is joined to the 20.

As shown in FIG. 9, the pair of upper arm portions 221 are formed with recessed portions 25a that are recessed from the joint surface 23a toward the inside of the side portion 12 of the inner panel 10 (front of the vehicle). Similarly, as shown in FIGS. 9 and 10, the pair of lower arm portions 222 are formed with recessed portions 25b that are recessed from the joint surface 23b toward the inside of the side portion 12. Reference holes 251 penetrating in the front-rear direction of the vehicle are formed in the recessed portions 25a and 25b. The protrusion 163 of the connecting piece 16 arranged on the side portion 12 is inserted into the reference hole 251. When the outer panel 20 is joined to the inner panel 10, the protrusions 163 and the reference hole 251 form a positioning structure of the outer panel 20 with respect to the inner panel 10. Further, as shown in FIG. 9, the fastening member 29 is arranged in the recessed portions 25a and 25b at a position adjacent to the reference hole 251. The fastening member 29 is, for example, a tapping screw. The fastening member 29 is arranged when the positioning of the outer panel 20 with respect to the inner panel 10 is completed. The fastening member 29 communicates with a hole (not shown) formed in the recessed portions 25a and 25b and a fastening hole 162a of the connecting piece 16.

As shown in FIG. 11, when the outer panel 20 is joined to the inner panel 10, the peripheral surface 163a (first region 163b) of the protrusion 163 comes into contact with the hole edge of the reference hole 251. At this time, a gap 251a is formed between two peripheral surfaces 163a adjacent to each other in the axial direction of the protrusion 163. In this case, as shown in FIG. 12, the accommodating portion 164 composed of the bottom portion 161 and the box frame portion 162 in the connecting piece 16 is closed by the indentation portions 25a and 25b. The gap 251a leads to the accommodating portion 164. When the back window 30 is joined to the outer panel 20, the back window 30 is configured to close the recessed portions 25a and 25b from the rear of the vehicle.

Next, the action and effect of the back door A10 will be described.

In the back door A10, the connecting piece 16 having the protrusion 163 is arranged on the side portion 12 of the inner panel 10. At the same time, the outer panel 20 is formed with a reference hole 251 through which the protrusion 163 is inserted into the recessed portions 25a and 25b that are recessed from the joint surfaces 23a and 23b toward the inside of the side portions 12. When the protrusion 163 is inserted into the reference hole 251, the peripheral surface 163a of the protrusion 163 comes into contact with the hole edge of the reference hole 251 and a gap 251a is formed between the two adjacent peripheral surfaces 163a. With such a configuration, when the outer panel 20 is positioned with respect to the inner panel 10, the frictional force between the protrusion 163 and the reference hole 251 is reduced, and fine adjustment of the positioning becomes easier.

Further, in the connecting piece 16, the accommodating portion 164 composed of the bottom portion 161 and the box frame portion 162 is closed by the indentation portions 25a and 25b. With such a configuration, when the back window 30 is damaged, the glass piece that has entered the gap 251a is captured by the accommodating portion 164. Therefore, according to the back door A10, it is possible to prevent the glass piece of the back window 30 from entering the inside of the back door A10 while improving the positioning accuracy of the outer panel 20 with respect to the inner panel 10.

The present invention is not limited to the embodiments described above. The specific configuration of each part of the present invention can be freely redesigned.

A10: Back door 10: Inner panel 11: Inner opening 12: Side 121: Bottom surface 122: Inner side surface 13: Opening upper side 131: Door flange mounting part 14: Hem part 141: Opening lower side 142: Connecting part 143: Frame Part 143a: Latch mounting part 144: Circumferential groove 144a: Bottom surface 145: Box-shaped bulging part 145a: Swelling surface 146: Concave groove 151: Inner peripheral flange 152: Outer flange 16: Connecting piece 161: Bottom part 162: Box frame part 162a : Fastening hole 163: Protruding part 163a: Peripheral surface 163b: First area 163c: Second area 164: Accommodating part 165: Partition wall 20: Outer panel 20a: Upper panel 20b: Lower panel 21: Outer opening 221: Upper arm part 222 : Lower arm part 23a, 23b: Joint surface 241: Flange 242: Butt part 25a, 25b: Inset part 251: Reference hole 251a: Air gap 29: Fastening member 30: Back window

Claims (1)

Inner panel made of synthetic resin and
The outer panel joined to the inner panel and
A vehicle back door including a back window joined to the outer panel as a component.
The inner panel includes an inner opening leading to the back window and a pair of side portions located on the left and right sides of the inner opening and opened toward the rear of the vehicle.
On the side portion, a connecting piece having a bottom portion facing the rear of the vehicle, a box frame portion surrounding the peripheral edge of the bottom portion, and a protrusion protruding from the bottom portion toward the rear of the vehicle is arranged.
The protrusion has a plurality of peripheral surfaces that are oriented in a direction intersecting the axial direction and are separated in the axial direction.
The outer panel is formed with a recessed portion that is recessed from the joint surface to which the back window is joined toward the inside of the side portion.
A reference hole is formed in the recessed portion so as to penetrate in the front-rear direction of the vehicle and through which the protrusion of the connecting piece is inserted.
The peripheral surface of the protrusion comes into contact with the edge of the reference hole, and the housing portion formed of the bottom portion and the box frame portion of the connecting piece is closed by the recessed portion. Back door for vehicles.

Images