JP5056234B2 - Back door latch mounting part reinforcement structure - Google Patents

Description

  The present invention relates to a structure for reinforcing attachment of a latch to a back door of a vehicle, and belongs to the technical field of vehicle body structure.

  In a vehicle such as a wagon car, an opening is provided in the rear wall of the vehicle body, and a back door that opens and closes the opening may be provided. The back door is configured to be rotatable about the upper side via a hinge provided on the upper side of the opening, for example, and a latch provided on the lower side is provided on the lower side of the opening. It is configured to be able to lock in a closed state by engaging with a striker.

  As an attachment structure of a latch to such a back door, for example, in Patent Document 1, the back door is configured as a hollow body by an inner panel and an outer panel, and a back door is provided on a lower surface portion of the front inner panel. A latch opening is formed so that the engagement member of the latch accommodated in the interior faces the outside so that it can be engaged with the striker on the vehicle body side when closed, and the latch is for latching in the inner panel The thing attached to the lower surface part of the said inner panel via the reinforcement plate which reinforces the periphery of an opening part is disclosed.

JP 2006-56361 A

  However, even if a reinforcing plate is provided around the opening for latching as described in Patent Document 1, the following problems may occur. In other words, various external vibrations such as engine vibrations and vibrations caused by tires picking up fine irregularities on the road surface are applied to the back door via the hinges on the upper side of the back door, and between the latch and striker. Is input to the lower side of the back door through the section. In that case, since the engagement portion between the latch and the striker is usually point-like at one place, the vibration is intensively input near the attachment portion of the latch on the lower side of the back door. If the rigidity of the peripheral part of the reinforcing plate is not sufficient, the inner part and the outer panel of the peripheral part and the part connected thereto vibrate while deforming, and this vibration may cause noise from the back door.

  Then, this invention makes it a subject to provide the latch attachment part structure which can suppress generation | occurrence | production of the noise from a back door.

  In order to solve the above-described problems, the present invention is configured as follows.

First, the invention according to claim 1 of the present application is provided with a back door that opens and closes by turning an opening provided on the rear surface of the vehicle body around the upper side via a hinge provided on an upper side of the opening. The back door is configured as a hollow body of an inner panel and an outer panel, and an engaging member of a latch accommodated in the back door is exposed to the outside on the lower surface portion of the inner panel. A latch opening that is engageable with the striker on the vehicle body side when closed, and the latch is connected to the inner panel via a reinforcing plate that reinforces the periphery of the latch opening in the inner panel. A latch mounting portion reinforcing structure for a back door attached to a lower surface portion, and extending upward from a rear portion of the reinforcing plate and joined to the outer panel. With part is provided, on the inner panel, rear extension portion is provided extending rearward, the joint between the upper extension portion and the outer panel of the reinforcing plate, the rear extension of the inner panel is joined It is characterized by being.

  According to a second aspect of the present invention, in the back door latch mounting portion reinforcing structure according to the first aspect, the upper extension of the reinforcing plate is joined to the outer panel on the upper side, and the inner The lower surface portion of the panel extends rearward from the base portion of the upper extension portion, and a closed cross section is formed by the upper extension portion of the reinforcing plate, the portion rearward of the base portion of the lower surface portion of the inner panel, and the outer panel. It is characterized by being.

  According to a third aspect of the present invention, in the back door latch mounting portion reinforcing structure according to the first or second aspect, a bead extending in the vertical direction is formed in an upper extension portion of the reinforcing plate. It is characterized by being.

  According to a fourth aspect of the present invention, in the back door latch mounting portion reinforcing structure according to any one of the first to third aspects, the vehicle extension direction upper side portion of the reinforcing plate has both sides in the vehicle width direction. A bent portion that is bent forward or backward of the vehicle is formed.

  The invention according to claim 5 is the back door latch mounting portion reinforcing structure according to any one of claims 1 to 4, wherein the joint portion between the upper extension portion of the reinforcing plate and the outer panel is: It is covered with the exterior member provided in the back of an outer panel.

According to a sixth aspect of the present invention, there is provided a back door that opens and closes by rotating an opening provided on the rear surface of the vehicle body about the upper side via a hinge provided on an upper side of the opening. The back door is configured as a hollow body with an inner panel and an outer panel, and the engaging member of the latch accommodated in the back door is exposed to the outside on the lower surface portion of the inner panel, A latching opening is formed to be engageable with a striker on the vehicle body side when closed, and the latch has a lower surface portion of the inner panel via a reinforcing plate that reinforces the periphery of the latching opening in the inner panel. A back door latch mounting portion reinforcing structure attached to the side plate, the side plate extending to the reinforcing plate in the vehicle width direction and joined to the lower surface portion of the inner panel. Vignetting and lateral extension of the reinforcing plate, and wherein the proximal bulges upward so as to be separated from the lower surface portion of the inner panel, the distal end side is joined to the lower surface portion of the inner panel To do.

  Next, the effect of the present invention will be described.

According to the first aspect of the present invention, the reinforcing plate is provided with an upper extension extending upward from the rear portion thereof and joined to the outer panel, and at the joint between the upper extension and the outer panel. Since the rear extension of the inner panel is joined, the inner panel, the outer panel, and the upper extension support each other in the vehicle longitudinal direction. As a result, the inner panel and the outer panel are deformed in the longitudinal direction (the drum skin The rigidity against deformation (such as vibration) is improved. Therefore, even if external vibration or the like as described in the background art is applied to the back door from the vehicle body side, these panels deform as described above and vibrate in the front-rear direction (vibration like a drum skin). The back door as a whole is prevented from vibrating in the front-rear direction. As a result, the generation of noise due to these vibrations is also suppressed.

  According to the second aspect of the present invention, the lower portion of the back door is formed by a closed cross section formed by the upper extension portion of the reinforcing plate, the rear portion of the lower surface portion of the inner panel than the base portion, and the outer panel. Thus, the rigidity around the latch is further improved, and the above-described effects can be obtained better.

  According to the invention described in claim 3, the rigidity of the upper extension is improved by the bead extending in the vertical direction, and the above-described effects can be obtained better.

  According to the invention described in claim 4, since both sides in the vehicle width direction of the upper extension are bent forward or rearward of the vehicle, the rigidity of the upper extension is improved, and the above-described effect is further enhanced. It will be obtained satisfactorily.

  According to the invention described in claim 5, since the joint portion between the upper extension portion of the reinforcing plate and the outer panel is covered with the exterior member provided behind the outer panel, for example, even when joined by welding The weld mark is not visible from the outside, and the appearance of the vehicle is prevented from deteriorating.

  According to the invention described in claim 6, since the reinforcing plate is provided with a lateral extension portion that extends in the vehicle width direction and is joined to the lower surface portion of the inner panel, the lower surface portion of the inner panel. Is reinforced in a wide range in the vehicle width direction, and the rigidity is further improved. Here, when the lower portion of the back door is closed, it is connected to the vehicle body side via a point-like engagement portion between the striker and the latch. When added, there is a possibility that the lower part of the back door may generate a vibration in the rotational direction around the point-like engaging portion in plan view. In particular, when the rigidity of the lower surface portion of the inner panel is low, the lower surface portion undergoes torsional deformation that allows vibration in the rotational direction, and as a result, the aforementioned rotational vibration is likely to occur. In addition, when such deformation occurs, other parts of the inner panel and the outer panel are also deformed, and vibration and noise associated therewith are easily generated. However, in the present invention, since the lower surface portion of the inner panel is reinforced in a wide range in the vehicle width direction by the laterally extending portion of the reinforcing plate, the rigidity against deformation in the rotational direction is improved, and Generation of vibration and noise will be suppressed.

According to the present invention , the lateral extension portion bulges upward so that the base side is separated from the lower surface portion of the inner panel, and the distal end side is joined to the lower surface portion of the inner panel. A closed cross-section is formed by the lower surface portion and the side extension portion of the reinforcing plate. Therefore, the rigidity of the lower surface portion of the inner panel is further improved, and the noise generation suppressing effect can be further improved.

  Hereinafter, the latch attachment part reinforcement structure of the back door which concerns on embodiment of this invention is demonstrated.

  FIG. 1 is a rear view of a vehicle 1 to which the present latch mounting portion reinforcing structure is applied. On the rear surface of the vehicle 1, an opening 2 for carrying luggage or the like into a luggage space behind the rear seat is formed, and a back door 3 for opening and closing the opening 2 is provided. The back door 3 is configured to be rotatable about the upper side via hinges 4, 4 provided on the upper side 2 a of the opening 2, for example, and provided at the center lower portion in the vehicle width direction. The latch 5 is configured to be locked in a closed state by engaging with a striker 6 provided at the center in the vehicle width direction of the lower side 2b of the opening 2.

  As shown in FIG. 2, the back door 3 is configured as a hollow body with an inner panel 11 and an outer panel 12.

  The inner panel 11 has a vertical surface portion 11a that extends substantially vertically and a lower surface portion 11b that extends rearward from the lower end of the vertical surface portion 11a. The outer panel 12 has a vertical surface portion 12 a extending substantially vertically, and a lower end portion of the vertical surface portion 12 a is joined to a rear end portion of the lower surface portion 11 b of the inner panel 11.

  The striker 6 is formed by bending a round bar-like member into a U shape, and both ends are fixed to the base plate 21. The base plate 21 is fixed to the upper surface of the lower side 2b of the opening 2. The lower side 2b of the opening 2 has a closed cross-sectional structure extending in the vehicle width direction by the inner panel 31 and the outer panel 32. A reinforcing member 33 is overlapped and joined to the inner surface of the inner panel 31, and the base plate 21 is overlapped with the overlapping portion and fastened by bolts and nuts.

  As shown in FIG. 3, the latch 5 includes a base plate 41, a housing 42 fixed to the base plate 41, and a support that is pivotally supported by the housing 42 and extends in parallel with the rear vertical bar portion 6 a of the striker 6. By being supported on the shaft 45 so as to be rotatable about the shaft 45 and being engageable with the rear vertical bar portion 6a of the striker 6, the housing 44 is fixed to the striker 6 when the back door 3 is closed. The elastic member 44 etc. which absorb an impact are included.

  Here, at the center in the vehicle width direction of the lower surface portion 11b of the inner panel 11 of the back door 3, the lower portion (including the flange member 43) of the latch 5 housed in the inner space of the back door 3 is exposed to the outside. A latching opening 11c is formed (see FIG. 4). A reinforcing plate 50 for reinforcing the periphery of the latch opening 11c is disposed on the inner surface in the vehicle width direction of the lower surface portion 11b. The latch 5 is fixed to the lower portion of the back door 3 by fastening the base plate 41 to the lower surface portion 11b of the inner panel 11 via the reinforcing plate 50 with bolts and nuts.

As shown in FIG. 4, a plurality of openings 11e... 11e for weight reduction are formed in the vertical surface portion 11a of the inner panel 11 below the window opening 11d. Further, the inner panel 11 extends from the upper edge of a predetermined opening of these openings 11e... 11e to the outer panel 12 side, and bent portions 11i, 11k... 11k, 11j. The rear extensions 11f, 11g,... 11g, 11h,. These rear extensions 11f, 11g,... 11g, 11h,... 11h have a curved shape that bulges upward in a rear view in order to ensure the rigidity.

  As shown in FIG. 5, the reinforcing plate 50 has an opening 51a formed at a position corresponding to the latching opening 11c of the inner panel 11, and is joined to the periphery of the latching opening 11c of the inner panel 11 by welding. The main body 51 (the portion corresponding to the reinforcing plate in the patent document of the background art), the upper extension 52 extending upward from the rear end of the main body 51, and the left and right ends of the main body 52 It has side extensions 53, 53 extending in the width direction.

  A bent portion 51b that bends upward along the vertical surface portion 11a of the inner panel 11 is formed at the front end portion of the main body portion 51a.

  A bead 52a extending in the vertical direction is formed at the center of the upper extension 52 in the vehicle width direction.

  Further, bent portions 52b and 52b that are bent forward of the vehicle are formed on both sides of the upper extension portion 52 in the vehicle width direction.

  Further, projecting portions 52c and 52c projecting on both sides in the vehicle width direction are formed at the upper end portion of the upper extension portion 52, and the projecting portions 52c and 52c are formed on the inner panel as shown in FIG. 11 is overlapped with the front end bent portion 11i of the rear extension portion 11f located at the center in the vehicle width direction and the fixing portion 12b of the vertical surface portion 12a of the outer panel 12, and is joined by welding. The fixing portion 12b is slightly recessed on the inner panel 11 side in order to improve rigidity around the portion of the vertical surface portion 12a. The joint β is covered with a license plate L attached to the rear of the outer panel 12.

  Further, as shown in FIG. 1, the front end bent portion 11j of the rear extension portions 11h, 11h above the rear extension portion 11f at the center in the vehicle width direction and the vertical surface portion 12a of the outer panel 12 are joined together by welding. Yes. This joint is covered with a garnish G attached to the rear of the outer panel 12.

  Further, the left and right rear extension portions 11g... 11g of the rear extension portion 11f at the center in the vehicle width direction are joined to the front end bent portions 11k... 11k and the vertical surface portion 12a of the outer panel 12 using an adhesive. The adhesive is used in order to prevent welding marks.

  As shown in FIG. 5, the left and right side extensions 53 and 53 of the reinforcing plate 50 bulge upward so that the portion 53 a on the main body 51 side is separated from the lower surface portion 11 b of the inner panel 11. 53b is joined to the lower surface portion 11b by welding.

  As shown in FIG. 2, the lower surface portion 11 b of the inner panel 11 extends further to the rear than the base portion 52 d of the upper extension portion 52 of the reinforcing plate 50. As a result, a closed cross section X is formed by the upper extension 52 of the reinforcing plate 50, the portion 11 b ′ behind the base 52 d of the lower surface 11 b of the inner panel 11, and the vertical surface 12 a of the outer panel 12. ing.

As described above, according to the latch attachment portion reinforcing structure of the back door according to the present embodiment, the reinforcing plate 50 is provided with the upper extension portion 52 that extends upward from the rear portion and is joined to the outer panel 12. In addition, since the front end bent portion 11i of the rear extension portion 11f provided on the inner panel 11 is joined to the joint portion between the upper extension portion 52 and the outer panel 12, the inner panel 11, the outer panel 12, and the upper extension portion 52 are joined. Are supported in the vehicle front-rear direction, and as a result, the rigidity of the inner panel 11 and the outer panel 12 against deformation in the front-rear direction is improved. Therefore, even if external vibration or the like as described in the background art is applied to the back door 3 from the vehicle body side, these panels 11 and 12 are deformed as described above to vibrate in the front-rear direction (such as a drum skin). Vibration) or the back door 3 as a whole is restrained from vibrating in the front-rear direction. As a result, the generation of noise due to these vibrations is also suppressed.

  Further, a closed cross section is formed by the upper extension 52 of the reinforcing plate 50, the portion 11b 'of the lower surface 11b of the inner panel 11 behind the base 52d of the upper extension 52 of the reinforcing plate 50, and the outer panel 12. As a result, the rigidity of the lower portion of the back door 3 is further improved, and the above-described effects can be obtained better.

  Further, since the bead 52a extending in the vertical direction is formed in the upper extension portion 52 of the reinforcing plate 50, the rigidity of the upper extension portion 52 is improved, and the above-described effects can be obtained better.

  Further, since both side portions in the vehicle width direction of the upper extension portion 52 of the reinforcing plate 50 are bent forward or rearward of the vehicle, the rigidity of the upper extension portion 52 is improved, and the above-described effects can be obtained better. Become.

  Further, since the joint portion β between the upper extension 52 of the reinforcing plate 50 and the outer panel 12 is covered by a license plate L (exterior member) provided at the rear of the outer panel 12, the welding trace is not visible from the outside, and the vehicle Deterioration of the appearance is prevented.

  Further, since the reinforcing plate 50 is provided with a side extension 53 that extends in the vehicle width direction and is joined to the lower surface portion 11b of the inner panel 11, the lower surface portion 11b of the inner panel 11 has a wide range in the vehicle width direction. The rigidity is further improved. Here, as described above, the lower portion of the back door 3 is connected to the vehicle body side via a point-like engagement portion γ between the striker 6 and the latch 5 as shown in FIG. 3 when closed. However, in the case of such a structure, when external vibration or the like as described above is applied, the lower portion of the back door 3 may generate vibration in the rotational direction centering on the point-like engagement portion γ in plan view. There is. In particular, when the rigidity of the lower surface portion 11b of the inner panel 11 is low, the lower surface portion 11b is torsionally deformed to allow vibration in the rotational direction, and as a result, the above-described rotational direction vibration is likely to occur. In addition, when such deformation occurs, the vertical surface portion 11a (other part) of the inner panel 11 and the vertical surface portion 12a of the outer panel 12 are also deformed, and vibration and noise associated therewith are easily generated. However, in the present embodiment, since the lower surface portion 11b of the inner panel 11 is reinforced in a wide range in the vehicle width direction by the side extending portions 53, 53 of the reinforcing plate 50, the rigidity against deformation in the rotational direction is increased. Thus, the generation of vibration and noise due to the above-described deformation is suppressed.

Further, the side extension 53 of the reinforcing plate 50 bulges upward such that the portion 53a on the main body 51 side is separated from the lower surface 11b of the inner panel 11, and the tip 53b extends to the lower surface 11b of the inner panel 11. Since they are joined, a closed cross section is formed by the lower surface portion 11b of the inner panel 11 and the lateral extension portion 53 of the reinforcing plate 50. Therefore, the rigidity of the lower surface portion 11b of the inner panel 11 is further improved and the deformation thereof is further suppressed, and the generation of vibration and noise associated therewith is further suppressed.

  The present invention can suppress generation of noise from the back door provided on the rear surface of the vehicle body and vibration of the back door, and can be widely applied to vehicles provided with the back door.

1 is a rear view of a vehicle to which a latch mounting portion reinforcing structure for a back door according to an embodiment of the present invention is applied. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. 2 (it represents with the dashed-two dotted line other than the collar member of a striker and a latch). It is the perspective view which looked at the inner panel single-piece | unit of a back door from the vehicle diagonally back. It is the expansion perspective view which looked at the latch attachment part vicinity of the back door from the vehicle diagonally back in the state which removed the outer panel and the latch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Opening part 3 Back door 4, 4 Hinge 5 Latch 6 Striker 11 Inner panel 11a Vertical surface part 11b Lower surface part 11c Latching opening part 11f Back extension part (part joined to the upper extension part of the reinforcement plate in an inner panel)
12 Outer panel 12a Longitudinal surface portion 43 Gutter member (engagement member)
50 Reinforcing plate 51 Main body 52 Upper extension 52a Bead 52b Bending part 52c Projection (part joined to outer panel in upper extension)
53 Side extension 53a A part of the side extension that bulges upward on the main body side (part that bulges upward on the base side)
53b Tip (tip side of side extension)
L License plate (exterior material)

Claims (6)

A back door is provided that opens and closes by rotating an opening provided on the rear surface of the vehicle body around a top side via a hinge provided on an upper side of the opening. The back door includes an inner panel and an outer panel. And a latch member housed inside the back door facing the outside on the lower surface of the inner panel so that it can be engaged with the striker on the vehicle body side when closed. And a latch mounting portion reinforcement of a back door attached to the lower surface portion of the inner panel via a reinforcing plate that reinforces the periphery of the latch opening portion in the inner panel. Structure,
The reinforcing plate is provided with an upper extension extending upward from the rear portion and joined to the outer panel,
The inner panel is provided with a rear extension extending rearward,
A back door latch mounting portion reinforcement structure , wherein a rear extension portion of the inner panel is joined to a joint portion between the upper extension portion of the reinforcement plate and the outer panel. In the back door latch mounting portion reinforcing structure according to claim 1,
The upper extension of the reinforcing plate is joined to the outer panel on the upper side,
The lower surface portion of the inner panel extends to the rear from the base portion of the upper extension portion,
A back door latch mounting portion reinforcing structure characterized in that a closed section is formed by an upper extension portion of the reinforcing plate, a portion of the lower surface portion of the inner panel behind the base portion, and an outer panel. In the latch attachment part reinforcement structure of the back door of the said Claim 1 or Claim 2,
A latch mounting portion reinforcing structure for a back door, wherein a bead extending in the vertical direction is formed in an upper extension portion of the reinforcing plate. In the latch attachment part reinforcement structure of the back door in any one of the said Claims 1-3,
A back door latch mounting portion reinforcing structure, wherein bent portions bent forward or backward of the vehicle are formed on both side portions in the vehicle width direction of the upper extension portion of the reinforcing plate. In the back door latch mounting portion reinforcing structure according to any one of claims 1 to 4,
The back door latch mounting portion reinforcing structure, wherein a joint portion between the upper extension portion of the reinforcing plate and the outer panel is covered with an exterior member provided behind the outer panel. A back door is provided that opens and closes by rotating an opening provided on the rear surface of the vehicle body around a top side via a hinge provided on an upper side of the opening. The back door includes an inner panel and an outer panel. And a latch member housed inside the back door facing the outside on the lower surface of the inner panel so that it can be engaged with the striker on the vehicle body side when closed. And a latch mounting portion reinforcement of a back door attached to the lower surface portion of the inner panel via a reinforcing plate that reinforces the periphery of the latch opening portion in the inner panel. Structure,
The reinforcing plate is provided with a lateral extension that extends in the vehicle width direction and is joined to the lower surface of the inner panel .
A back door latch characterized in that a lateral extension of the reinforcing plate bulges upward so that a base side is separated from a lower surface portion of the inner panel, and a distal end side is joined to the lower surface portion of the inner panel. Mounting part reinforcement structure.

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