JP5708427B2 - Sliding door structure - Google Patents

Description

  The present invention relates to a sliding door structure for a vehicle body.

  2. Description of the Related Art Conventionally, there has been known a structure that suppresses the sliding door from entering a cabin when a sliding door provided on a side surface of a vehicle body receives a collision load due to a side collision. For example, the following Patent Document 1 discloses a structure in which a hooking bead provided at a lower portion of a slide door is engaged with an upper edge of a guide groove of a rocker rail to prevent the slide door from entering the cabin. Yes.

Japanese Patent Laying-Open No. 2005-081853

  However, in the conventional structure, when the door inner panel is greatly deformed, the engagement between the hook bead and the upper edge of the rocker rail guide groove is disengaged, and the sliding door cannot be sufficiently prevented from entering the cabin. Conceivable. Therefore, in order to prevent the sliding door from entering the cabin, an extra reinforcing member such as an impact beam is set between the door inner panel and the door outer panel of the sliding door to increase the strength and rigidity of the entire sliding door. It is possible to raise. In this case, the weight of the entire slide door is increased, and as a result, the weight of the entire vehicle body is increased.

  In view of the above facts, an object of the present invention is to obtain a sliding door structure that can suppress the sliding door from entering the cabin during a side collision while suppressing an increase in the weight of the vehicle body.

According to a first aspect of the present invention, there is provided a sliding door structure that is housed in a door frame and that separates a cabin and a vehicle exterior so as to be openable and closable. A rocker that forms an open U-shaped closed cross section; a first protrusion that protrudes outward in the vehicle width direction of the rocker and has a plurality of corners; and the first in the door inner panel of the slide door. A flat portion provided at a position facing the convex portion, and a second convex portion provided below the flat portion of the door inner panel and projecting inward in the vehicle width direction and having a plurality of corner portions. The height in the vehicle vertical direction of the lower corner of the first convex portion is arranged at a position higher than the height in the vehicle vertical direction of the upper corner of the second convex portion, and the second convex portion is It is formed integrally with the door inner panel, Whole serial vehicle vertical direction of the first convex portion is characterized in that opposite the plane portion and the vehicle width direction.

  In the first aspect of the present invention, when the slide door receives a collision load due to a side collision, and the slide door is deformed and moved toward the cabin, first, the first protrusion provided on the rocker and the slide door are provided. The flat part comes into contact. When the sliding door is further deformed toward the inside of the cabin, the second convex portion provided below the flat portion is locked to the first convex portion. In other words, in the present invention according to claim 1, since the flat surface portion is provided, the second convex portion is reliably locked to the first convex portion. As a result, the lower end of the sliding door is prevented from passing through the rocker and entering the cabin, and an extra reinforcing member such as an impact beam is added inside the sliding door to increase the strength and rigidity of the sliding door. Is no longer necessary.

The sliding door structure according to a second aspect of the present invention is the sliding door structure according to the first aspect , wherein the lower corner portion of the first convex portion is outside in the vehicle width direction than the upper corner portion of the second convex portion. It is characterized by being arranged in .

  In the present invention according to claim 2, even if the sliding door is deformed and moved toward the cabin due to the collision load due to the side collision, the lower corner of the first convex portion is the second convex portion. Since it is arrange | positioned rather than the upper side corner | angular part of a vehicle width direction, a 2nd convex part is reliably latched by a 1st convex part.

According to a third aspect of the present invention, there is provided the sliding door structure according to the first or second aspect, wherein the rocker has an upper flange portion of the rocker inner panel and an upper flange portion of the rocker outer panel overlapped. is constituted by a lower flange portion of the lower flange portion and the rocker outer panel of the rocker inner panel is superposed and joined together are joined Te, the upper corner portions of the second protrusion is the upper side of the rocker outer panel It is arranged at the same position in the vehicle width direction or at the inner side in the vehicle width direction with respect to the flange portion.

  In the present invention according to claim 3, the upper corner portion of the second convex portion is arranged at the same position in the vehicle width direction or the inner side in the vehicle width direction with respect to the upper flange portion of the rocker outer panel. Therefore, when the sliding door receives a collision load due to a side collision and the sliding door is deformed and moved toward the cabin, the second convex portion is locked to the first convex portion and the second convex portion is the upper flange of the rocker outer. It is latched by the lower end part of a part.

  A slide door structure according to a fourth aspect of the present invention is the slide door structure according to any one of the first to third aspects, wherein the slide door is a front seat slide door. .

  By the way, a vehicle body equipped with a sliding door (hereinafter referred to as a “front seat sliding door”) that allows an occupant to get on a front seat such as a passenger seat is a rear seat such as the second row or the third row. Compared to a vehicle body equipped with a sliding door (hereinafter referred to as a “rear seat sliding door”), the distance between the front pillar and the rear pillar constituting the door frame of the sliding door tends to be wider. is there. Therefore, in order to suppress the front seat sliding door from entering the cabin, an extra reinforcing member such as an impact beam formed in an elongated shape in the longitudinal direction of the vehicle is added. That is, in the vehicle body provided with the front seat sliding door, the increase in the weight of the vehicle body due to the provision of a reinforcing member such as an impact beam becomes more remarkable. However, in this invention which concerns on Claim 4, since the said plane part is provided, a 2nd convex part is reliably latched by a 1st convex part. As a result, the lower end of the front seat sliding door is prevented from passing through the rocker and entering the cabin, and a reinforcing member such as an impact beam is attached to the front seat sliding door to increase the strength and rigidity of the front seat sliding door. It becomes unnecessary to add extra to the inside.

  As described above, the sliding door structure according to the first aspect of the present invention has an excellent effect that the sliding door can be prevented from entering the cabin while suppressing an increase in the weight of the vehicle body. .

  The sliding door structure according to the second aspect of the present invention has an excellent effect that the sliding door can be further suppressed from entering the cabin.

  The slide door structure according to the third aspect of the present invention has an excellent effect that the collision load due to the side collision can be efficiently transmitted to the rocker.

  The sliding door structure according to the present invention described in claim 4 is excellent in that the front seat sliding door can be prevented from entering the cabin while suppressing an increase in the weight of the vehicle body including the front seat sliding door. Has an effect.

It is sectional drawing which shows the sliding door structure which concerns on 1st Embodiment. (A) is a perspective view which shows the vehicle body to which the slide door structure which concerns on 1st Embodiment was applied, (B) is a perspective view which shows the door opening state of the slide door in the vehicle body described in (A). . It is sectional drawing which shows the state of a slide door and a rocker when the load by a side collision is added with respect to the slide door which concerns on 1st Embodiment. It is sectional drawing of this slide door and rocker which show the state which the slide door deform | transformed toward the cabin side by applying the load by a side collision to the slide door which concerns on 1st Embodiment. It is an expanded sectional view showing the slide door structure concerning a 2nd embodiment. It is an expanded sectional view showing the slide door structure concerning a 3rd embodiment. It is sectional drawing of this sliding door and rocker which shows the state which the sliding door deform | transformed toward the cabin side by applying the load by a side collision to the sliding door which concerns on 3rd Embodiment. (A) is a perspective view which shows the vehicle body provided with the rear seat slide door, (B) is sectional drawing which shows the slide door structure described in (A).

  The sliding door structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The front side in the vehicle front-rear direction is indicated by an arrow FR, the outer side in the vehicle width direction is indicated by an arrow OUT, and the upper side in the vehicle vertical direction is indicated by an arrow UP.

  As shown in FIG. 2A, the vehicle body 12 to which the slide door structure 10 according to the present embodiment is applied can open and close the slide door 14 so that a passenger can get on a front seat such as a passenger seat. A so-called front seat sliding door is provided.

  As shown in FIG. 2B, the vehicle body 12 includes a rocker 16 that extends in the longitudinal direction of the vehicle, and a front that extends from the end of the rocker 16 on the vehicle front side to the vehicle upper side. And a pillar 18. The vehicle body 12 includes a roof rail 20 extending from the vehicle upper side end of the front pillar 18 to the vehicle rear side, a vehicle rear side end portion of the roof rail 20 extending to the vehicle lower side, and a lower end portion. Includes a center pillar 22 connected to the rear end of the rocker 16. The rocker 16, the front pillar 18, the roof rail 20, and the center pillar 22 form a substantially rectangular door frame 24 in a vehicle side view. As shown in FIG. 2 (A), the sliding door 14 is accommodated in the door frame 24 so that the sliding door 14 separates the cabin 26 and the vehicle exterior so as to be openable and closable.

  Next, the rocker 16 and the slide door 14 which are the main parts of the slide door structure 10 of this embodiment will be described.

(Rocker 16)
As shown in FIG. 1, the rocker 16 has a substantially U-shaped closed cross section that opens outward in the vehicle width direction in a cross-sectional view. The rocker 16 has a divided structure including a rocker outer panel 28 disposed on the outer side in the vehicle width direction and a rocker inner panel 30 disposed on the inner side in the vehicle width direction. Further, the rocker outer panel 28 has a divided structure formed by joining a lower end portion of the rocker outer upper 32 disposed on the upper side of the vehicle and an upper end portion of the rocker outer lower 34 disposed on the lower side of the vehicle. .

  The rocker outer upper 32 includes a first extending portion 32A extending in the vehicle vertical direction. Further, the end portion of the first extending portion 32A on the vehicle lower side is a joint portion 32B. Further, the rocker outer upper 32 includes a second extending portion 32C that extends by bending outward from the end of the first extending portion 32A on the vehicle upper side in the vehicle width direction, and the vehicle of the second extending portion 32C. A third extending portion 32E is provided extending from the outer end in the width direction to the outer side in the vehicle width direction through the step portion 32D. In addition, the rocker outer upper 32 includes an upper flange portion 32F that is bent and extends upward from the end of the third extending portion 32E on the vehicle width direction outer side.

  The rocker outer lower 34 includes a first extending portion 34A extending in the vehicle vertical direction. Further, the end portion of the first extending portion 34A on the vehicle upper side is a joint portion 34B that is overlapped and joined to the joint portion 32B of the rocker outer upper 32. Further, the rocker outer lower 34 includes a second extending portion 34C that extends by bending outward from the end of the first extending portion 34A on the vehicle lower side in the vehicle width direction, and the second extending portion 34C in the vehicle width direction. A third extending portion 34E extending from the outer end portion to the outer side in the vehicle width direction through the step portion 34D is provided. Further, the rocker outer lower 34 includes a fourth extending portion 34F that extends from the end of the third extending portion 34E on the outer side in the vehicle width direction so as to be inclined outward in the vehicle width direction. Further, the rocker outer lower 34 includes a fifth extending portion 34G that extends obliquely inward in the vehicle width direction from an end portion on the vehicle width direction outer side of the fourth extending portion 34F, and a vehicle lower side of the fifth extending portion 34G. A lower flange portion 34H that bends and extends from the side end to the vehicle lower side is provided.

  The rocker inner panel 30 includes a first extending portion 30A extending in the vehicle vertical direction. In addition, the rocker inner panel 30 includes a second extending portion 30B that is bent and extends outward from the end of the first extending portion 30A on the vehicle upper side in the vehicle width direction, and the vehicle of the second extending portion 30B. A third extending portion 30 </ b> D extending outward in the vehicle width direction from the end portion on the outer side in the width direction via the step portion 30 </ b> C is provided. Further, the rocker inner panel 30 is bent and extended from the vehicle width direction outer side end of the third extending portion 30D to the vehicle upper side, and is overlapped and joined to the upper flange portion 32F of the rocker outer upper 32. The upper flange portion 30E is provided. Further, the rocker inner panel 30 includes a fourth extending portion 30G extending from the end of the first extending portion 30A on the vehicle lower side to the vehicle lower side via the step portion 30F. Further, the rocker inner panel 30 includes a fifth extending portion 30H that extends obliquely outward in the vehicle width direction from the vehicle lower side end portion of the fourth extending portion 30G to the vehicle upper side to the lower side. . Further, the rocker inner panel 30 extends from the end of the fifth extending portion 30H on the vehicle width direction outer side to the vehicle lower side, and is joined to the lower flange portion 34H of the rocker outer lower 34 so as to overlap with each other. A flange portion 30I is provided. Furthermore, a shoulder patch 36 that extends in the vehicle longitudinal direction and has a substantially L-shaped cross section is joined to the bent portion 30J formed by the first extending portion 30A and the second extending portion 30B. Yes.

  The rocker 16 is formed by the rocker outer upper 32, the rocker outer lower 34, and the rocker inner panel 30 described above.

  In addition, a slide rail guide 40 and a guide roller 41 that slide the slide door 14 so as to be openable and closable are provided in the groove portion 38 that opens to the outside in the vehicle width direction of the rocker 16. The slide rail guide 40 has a U-shaped cross section that extends in the longitudinal direction of the vehicle and that opens to the vehicle lower side. The slide rail guide 40 is joined to the wall surface on the vehicle lower side of the second extending portion 32 </ b> C of the rocker outer upper 32. A guide roller is slidably accommodated along the slide rail guide 40 so that the slide door 14 can slide in the vehicle front-rear direction via a hinge 42.

  Further, a lower portion 44 of the cycle outer is joined to the upper flange portion 32 </ b> F of the rocker outer upper 32 in the rocker 16. The lower portion 44 of the cycle outer includes a joint portion 44 </ b> A that extends in the vehicle vertical direction and is joined to the upper flange portion 32 </ b> F of the rocker outer upper 32. In addition, the lower part 44 of the cycle outer includes a first extending part 44B extending from the end of the joint part 44A on the vehicle lower side inclining outward in the vehicle width direction, and a lower end part of the first extending part 44B. A second extending portion 44C extending downward is provided. Furthermore, the lower part 44 of the cycle outer includes a third extending part 44D that extends from the end of the second extending part 44C on the vehicle lower side in an inclined manner inward in the vehicle width direction. In addition, a first convex portion 46 that protrudes outward in the vehicle width direction is formed on the lower portion 44 of the cycle outer by the first extending portion 44B, the second extending portion 44C, and the third extending portion 44D. Furthermore, the corner on the vehicle upper side of the first convex portion 46 is an upper corner portion 46A, and the corner on the vehicle lower side of the second convex portion 56 is a lower corner portion 46B.

(Sliding door 14)
The slide door 14 includes a door outer panel 48 disposed on the outer side in the vehicle width direction and a door inner panel 50 disposed on the inner side in the vehicle width direction as main elements. A door lower hinge reinforcement 52 and a door hinge reinforcement lower 54 that reinforce the slide door 14 are provided between the door outer panel 48 and the door inner panel 50.

  The door outer panel 48 is a plate-like press-molded part that extends in the vehicle front-rear direction and the vehicle width direction, and protrudes outward in the vehicle width direction and is gently curved. Further, the outer surface in the vehicle width direction of the door outer panel 48 is a design surface that constitutes a part of the exterior design of the vehicle. Also, the vehicle lower side end portion 48A of the door outer panel 48 is folded and hemming is performed, so that the vehicle lower side end portion 48A of the door outer panel 48 and the door lower hinge reinforcement 52 on the vehicle lower side end portion. And are combined.

  The door inner panel 50 includes a flat portion 50A extending in the vehicle vertical direction. The flat surface portion 50 </ b> A is disposed at a position facing the first convex portion 46 in a state where the slide door 14 is accommodated in the door frame 24. Further, the door inner panel 50 includes a first extending portion 50C extending from the end portion of the flat surface portion 50A on the vehicle upper side via the step portion 50B to the vehicle upper side. Further, the door inner panel 50 includes a second extending portion 50 </ b> D that extends obliquely from the end of the flat portion 50 </ b> A on the vehicle lower side toward the inner side in the vehicle width direction. Furthermore, the door inner panel 50 includes a third extending portion 50E that is bent and extends from an end of the second extending portion 50D on the vehicle lower side to the vehicle lower side, and a vehicle lower side of the third extending portion 50E. A fourth extending portion 50F extending obliquely from the end on the side toward the outer side in the vehicle width direction is provided. The fourth extending portion 50F is joined to the door lower hinge reinforcement 52, whereby the lower end portion of the door outer panel 48 and the lower end portion of the door inner panel 50 are joined via the door lower hinge reinforcement 52. is there.

  Further, on the vehicle lower side of the flat surface portion 50A of the door inner panel 50, a second protrusion protruding inward in the vehicle width direction by the second extending portion 50D, the third extending portion 50E, and the fourth extending portion 50F. A portion 56 is formed. Furthermore, the corner of the second convex portion 56 on the vehicle upper side is an upper corner portion 56A, and the corner of the second convex portion 56 on the vehicle lower side is a lower corner portion 56B.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 3, when a collision load due to a side collision is applied to the slide door 14 according to the present embodiment, the door outer panel 48 is deformed inward in the vehicle width direction and comes into contact with the door hinge reinforcement lower 54 and slides. The entire door 14 moves toward the cabin 26. In this case, first, the flat surface portion 50 </ b> A of the door inner panel 50 comes into contact with the second extending portion 44 </ b> C of the first convex portion 46 of the lower portion 44 of the cycle outer joined to the rocker 16. Further, as shown in FIG. 4, when the slide door 14 is further deformed toward the cabin 26, the second extending portion 50 </ b> D of the second convex portion 56 provided at the lower portion of the flat surface portion 50 </ b> A becomes the first convex portion 46. Abuts on the lower corner portion 46B. That is, the second convex portion 56 is locked to the first convex portion 46.

  Here, in the sliding door structure 10 of the present embodiment, first, the flat portion 50A of the door inner panel 50 abuts on the first convex portion 46 of the lower portion 44 of the cycle outer, and then the second convex portion 56 is the first convex portion 46. It is locked to. In other words, since the slide door structure 10 of the present embodiment includes the flat surface portion 50A, the second convex portion 56 can be reliably locked to the first convex portion 46. As a result, the lower end of the slide door 14 is prevented from passing through the rocker 16 and entering the cabin 26, and a reinforcing member such as an impact beam is attached to the slide door 14 in order to increase the strength and rigidity of the slide door 14. It becomes unnecessary to add extra inside. That is, in the sliding door structure 10 of this embodiment, it is possible to suppress the sliding door 14 from entering the cabin 26 while suppressing an increase in the weight of the vehicle body.

  Further, the slide door structure 10 of the present embodiment is applied to a vehicle body provided with a front seat slide door, but the vehicle body provided with the front seat slide door is a slide door compared to the vehicle body provided with the rear seat slide door. The distance between the front pillar 18 and the center pillar 22 constituting the 14 door frames 24 tends to increase. Therefore, in order to suppress the sliding door 14 from entering the cabin 26, an extra reinforcing member such as an impact beam formed in a long shape in the vehicle front-rear direction is added. That is, in the vehicle body provided with the front seat sliding door, the increase in the weight of the vehicle body due to the provision of a reinforcing member such as an impact beam becomes more remarkable. However, in this embodiment, since the planar portion 50A, the first convex portion 46, and the second convex portion 56 having the above-described configuration are provided, an extra reinforcing member such as an impact beam is added inside the slide door 14. In addition, the sliding door 14 can be prevented from entering the cabin 26.

(Second Embodiment)
Next, a sliding door structure according to a second embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 5, in the sliding door structure 58 of the present embodiment, the third extending portion 50 </ b> E of the second protruding portion 56 is on the inner side in the vehicle width direction than the second extending portion 44 </ b> C of the first protruding portion 46. It is characterized in that it is arranged (in the present embodiment, the third extending portion 50E is arranged inward in the vehicle width direction by a than the second extending portion 44C). That is, the lower corner portion 46B of the first convex portion 46 is configured such that the upper corner portion 56A of the second convex portion 56 is disposed further outward in the vehicle width direction.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  In the slide door structure 58 according to the present embodiment, the lower convex portion 46B of the first convex portion 46 is disposed on the outer side in the vehicle width direction than the upper angular portion 56A of the second convex portion 56. 56 is securely locked by the first convex portion 46. As a result, it is possible to further suppress the sliding door 14 from entering the cabin 26.

(Third embodiment)
Next, a sliding door structure according to a third embodiment of the present invention will be described using FIG. In addition, about the same member as the said 1st Embodiment etc., the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6, in the sliding door structure 60 of the present embodiment, the third extending portion 50 </ b> E of the second convex portion 56 is disposed on the inner side in the vehicle width direction than the upper flange portion 32 </ b> F of the rocker outer upper 32. (In the present embodiment, the third extending portion 50E is arranged on the inner side in the vehicle width direction by b than the upper flange portion 32F). That is, the upper corner portion 56 </ b> A of the second convex portion 56 is arranged on the inner side in the vehicle width direction than the upper flange portion 32 </ b> F of the rocker outer upper 32.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  When a collision load due to a side collision is applied to the slide door 14 according to the present embodiment, the door outer panel 48 is deformed inward in the vehicle width direction and abuts against the door hinge reinforcement lower 54 and the entire slide door 14 faces the cabin 26. Move. In this case, similarly to the first embodiment, first, the first convex portion 46 of the lower portion 44 of the outer cylinder joined to the rocker 16 comes into contact with the flat surface portion 50 </ b> A of the door inner panel 50. Further, when the slide door 14 is deformed toward the cabin 26, the second convex portion 56 provided at the lower portion of the flat surface portion 50 </ b> A is locked to the first convex portion 46. Further, when the slide door 14 is deformed toward the cabin 26, the second convex portion 56 is locked to the lower end portion of the upper flange portion 32F of the rocker outer upper 32 as shown in FIG. As a result, in the sliding door structure according to the present embodiment, the collision load due to the side collision can be efficiently transmitted to the rocker.

  In the first and second embodiments, the example in which the rocker 16 is divided by the rocker outer upper 32, the rocker outer panel 28, and the rocker inner panel 30 has been described. However, the present invention is not limited to this. For example, it is good also as a structure of 2 division by a rocker outer panel and a rocker inner panel.

  In the first to third embodiments, the example in which the present invention is applied to the vehicle body having the front seat sliding door has been described. However, the present invention is not limited to this, and the rear seat sliding door is provided. The present invention may be applied to a different vehicle body. For example, by applying the sliding door structure 62 shown in FIG. 8 (B) to the vehicle body having the rear seat sliding door shown in FIG. 8 (A), the same effects as in the first embodiment and the like can be obtained. Can do.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 Sliding door structure 14 Sliding door 16 Rocker 24 Door frame 26 Cabin 28 Rocker outer panel 30 Rocker inner panel 30E Upper flange part 30I Lower flange part 32F Upper flange part 34H Lower flange part 46 1st convex part 46A Upper corner part (corner) Part)
46B Lower corner (corner)
50 Door inner panel 50A Plane portion 56 Second convex portion 56A Upper corner portion (corner portion)
56B Lower corner (corner)
58 Sliding door structure 60 Sliding door structure 62 Sliding door structure

Claims (4)

A sliding door housed in a door frame and configured to open and close the cabin and the outside of the vehicle;
A rocker that forms the lower part of the door frame and that forms a U-shaped closed cross section that opens outward in the vehicle width direction;
A first protrusion that protrudes outward in the vehicle width direction of the rocker and has a plurality of corners;
A flat portion provided at a position facing the first convex portion in the door inner panel of the sliding door;
A second convex portion provided below the flat portion of the door inner panel, protruding inward in the vehicle width direction and having a plurality of corner portions;
Have
The height in the vehicle vertical direction of the lower corner portion of the first convex portion is arranged at a position higher than the height in the vehicle vertical direction of the upper corner portion of the second convex portion,
The second convex part is formed integrally with the door inner panel;
A sliding door structure in which the entire first convex portion in the vehicle vertical direction faces the flat portion in the vehicle width direction . The sliding door structure according to claim 1, wherein a lower corner portion of the first convex portion is disposed on an outer side in the vehicle width direction than an upper corner portion of the second convex portion . In the rocker, the upper flange portion of the rocker inner panel and the upper flange portion of the rocker outer panel are overlapped and joined, and the lower flange portion of the rocker inner panel and the lower flange portion of the rocker outer panel are overlapped and joined. Is composed by
Claim 1 or claim 2 the sliding door structure according disposed in the vehicle width direction the position or the vehicle width direction inner side with respect to the upper corner portion the upper flange portion of the rocker outer panel of the second protrusion.   The sliding door structure according to any one of claims 1 to 3, wherein the sliding door is a front seat sliding door.