Sliding door structure of vehicle

Abstract

A sliding door structure of a vehicle includes: a sliding door configured to slide to open and close a door opening portion of the vehicle; a lower sliding part provided on the lower end side of the sliding door; and a battery unit disposed on a vehicle lower side of a floor panel of the vehicle. The lower sliding part is arranged at a position on the upper side of the vehicle of the battery unit, the lower guide rail is arranged on the lower side of the inner side of the door opening part so as to extend in the sliding direction, and the guided part is only formed by a sliding member axially supported by a shaft part extending to the upper side of the vehicle, and the lower guide rail is arranged on the lower side of the inner side of the door opening part so as to extend in the sliding direction. The sliding member slides while being limited by the lower guide rail from the width direction of the vehicle.

Description

Technical Field

[0001] The invention relates to a sliding door structure of a vehicle. Background Art

[0002] A vehicle including such a sliding door is described in Japanese Unexamined Patent Application Publication No. 2019-214314. In this vehicle, the door opening is configured to be opened and closed by a sliding door. In addition, a floor panel is arranged on the inner side of the door opening in the vehicle width direction, and a battery unit is mounted on the lower side of the floor panel in the vehicle. The outer end of the battery unit on the outer side in the vehicle width direction protrudes from the floor panel. In addition, the upper side of the protruding outer end of the battery unit is covered with a step lower panel (external material). In addition, on the lower side of the door opening, a step is provided, which protrudes from the floor panel to the outer side in the vehicle width direction. The step is arranged at a height position higher than the battery unit, so as to be arranged directly above the step lower panel (external material) at a moderate interval.

[0003] A guide rail for guiding the sliding door is provided on the lower surface of the above-mentioned step board so as to extend in the sliding direction. In addition, a lower hinge is provided on the lower end side of the sliding door so as to extend to the inner side in the vehicle width direction. In addition, at the distal end of the lower hinge, a guide roller and a load roller are provided as a guided portion, the guide roller being axially supported by an axis extending in the vehicle height direction, and the load roller being axially supported by an axis extending in the vehicle width direction. In the above-mentioned structure, when the sliding door slides, the guide roller slides along the guide rail of the step board. In addition, the load roller is arranged directly below the step board and is placed on the lower panel of the step board. Thus, the load roller slides on the lower panel of the step board, and the load of the sliding door is received by the lower panel of the step board. In addition, in the above-mentioned structure, since the load roller is placed on the lower panel of the step board, the lower hinge provided with the load roller can be arranged on the upper side of the vehicle of the battery unit. Summary of the invention

[0004] In the field of the above-mentioned vehicle, it is required to make the lower hinge (lower sliding part) and the like as compact as possible. For example, by making the lower hinge compact in the vehicle height direction, the height position of the component arranged on the upper side of the vehicle of the lower hinge, such as the height position of the step board, can be easily adjusted. However, in the above-mentioned structure, it is necessary to make the load roller slide between the step board and the lower panel of the step board, and therefore, it is difficult to make the size of the lower hinge compact in the vehicle height direction. The present invention is invented in view of the above-mentioned points, and the problem to be solved by the present invention is to allow the lower sliding part of the sliding door to be guided at an appropriate height position while being as compact as possible.

[0005] One embodiment of the present invention is a sliding door structure of a vehicle. The sliding door structure of the vehicle includes: a sliding door configured to slide to open and close a door opening of the vehicle; a lower sliding portion provided on the lower end side of the sliding door; and a battery unit arranged on the lower side of the vehicle of a floor panel of the vehicle. The load when the sliding door slides is received on the upper side of the vehicle of the lower sliding portion, and the lower sliding portion is supported by the sliding door and arranged at a position on the upper side of the vehicle of the battery unit. A lower guide rail is provided on the lower side of the inner side of the door opening to extend in the sliding direction, and the lower guide rail guides a guided portion of the lower sliding portion. The guided portion is constituted by only a sliding member axially supported by a shaft portion to slide while being restricted from the vehicle width direction by the lower guide rail, and the shaft portion extends to the upper side of the vehicle. In the above configuration, the lower sliding portion can be supported by the sliding door and can be arranged on the upper side of the vehicle of the battery unit (at an appropriate height position). Furthermore, the lower sliding portion includes only the sliding member axially supported by the shaft portion extending to the upper side of the vehicle as a guided portion guided by the lower guide rail, and is compact in the vehicle height direction.

[0006] The sliding door structure of the vehicle may further include an upper sliding portion provided on the upper portion of the sliding door. The upper sliding portion may be provided on the upper side of the vehicle of the lower sliding portion, and an upper guide rail may be provided on the upper side of the door opening portion to extend in the sliding direction, and the upper guide rail causes the guided portion of the upper sliding portion to slide in a state of receiving the load of the sliding door. In the above configuration, the load of the sliding door when sliding can be received by the upper guide rail.

[0007] In the sliding door structure of the vehicle, the lower guide rail and the lower slide portion may be arranged on the upper side of the vehicle of the exterior material covering the upper side of the vehicle of the battery unit. In the above configuration, the lower guide rail and the lower slide portion are arranged at a position higher than the exterior material, i.e., at a more appropriate height position.

[0008] In the sliding door structure of the vehicle, the lower guide rail and the lower sliding portion may be arranged on the lower side of the vehicle of the tread of the step board provided on the upper side of the vehicle of the exterior material. In the above configuration, the lower guide rail and the lower sliding portion may be arranged between the step board and the exterior material in a well-matched manner. In addition, the vertical compactness of the lower sliding portion makes it easy to adjust the height position of the step board and ensure the ease of getting on and off.

[0009] In the sliding door structure of the vehicle, a position holding mechanism may be provided at the lower sliding portion, the position holding mechanism restricting the movement of the sliding member to the lower side of the vehicle. In the above configuration, the position holding mechanism makes it possible to more appropriately hold the height position of the sliding member, and when the member is placed on the upper side of the vehicle of the sliding member, the height position of the member (step board, etc.) can be easily adjusted.

[0010] The above-mentioned construction allows the lower sliding portion of the sliding door to be guided at an appropriate height position while being as compact as possible. Furthermore, in the above-mentioned construction, the lower sliding portion can be more reliably arranged at an appropriate height position. Furthermore, in the above-mentioned construction, the lower sliding portion can be further reliably arranged at an appropriate height position. Furthermore, in the above-mentioned construction, various components can be more appropriately arranged on the upper side of the vehicle of the lower sliding portion. Furthermore, in the above-mentioned construction, various components can be further appropriately arranged on the upper side of the vehicle of the lower sliding portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals represent like elements, and in which:

[0012] Figure 1 is a perspective view of the vehicle as viewed from the left side;

[0013] Figure 2 is a cross-sectional view of the lower part of the vehicle;

[0014] Figure 3 is a cross-sectional view of the upper portion of the vehicle;

[0015] Figure 4 is a three-dimensional view of the upper sliding portion;

[0016] Figure 5 is an enlarged cross-sectional view of the lower portion of the vehicle showing the lower sliding portion;

[0017] Figure 6 is an enlarged cross-sectional view of the lower portion of the vehicle showing the lower sliding portion in the second embodiment; and

[0018] Figure 7 It is a perspective view of the position holding mechanism in the second embodiment. DETAILED DESCRIPTION

[0019] The following will refer to Figures 1 to 7 An embodiment of the present invention is described. In the drawings, arrow lines showing the front-rear direction, left-right direction (vehicle width direction), and up-down direction (vehicle height direction) of the vehicle are illustrated as appropriate. In addition, in the drawings, the left side of the vehicle is completely illustrated. The left side of the vehicle corresponds to the outer side in the vehicle width direction, and the right side of the vehicle corresponds to the inner side in the vehicle thickness direction.

[0020] Vehicle Overview

[0021] Before describing the sliding door structure of the vehicle, the following will be described. Figure 1 An outline of a vehicle 2 is shown. A rear door opening portion 10 corresponding to a rear seat is formed on a vehicle body 3 of the vehicle 2. The rear door opening portion 10 is configured to be openable and closable by a sliding door 20 that slides in the vehicle front-rear direction. In addition, a door sill 30 that is a frame having a hollow cross section is provided at a lower edge portion of the rear door opening portion 10 so as to extend in the vehicle front-rear direction. In addition, a step plate 40 is provided on the vehicle upper side of the door sill 30, that is, on the vehicle lower side on the inner side of the rear door opening portion 10 (in the housing of the rear door opening portion 10) so as to extend in the vehicle front-rear direction.

[0022] In addition, Figure 1 In the vehicle 2 shown, a plurality of guide rails (7, 8, 9) extending in the sliding direction of the sliding door 20 are provided. That is, in the vehicle 2, an upper guide rail 7 is provided on the upper side of the vehicle of the rear door opening 10. In addition, a center guide rail 8 is provided at the center position in the height direction of the rear side of the rear door opening 10. In addition, a lower guide rail 9 is provided on the lower surface of the step plate 40.

[0023] Next, the sliding parts (21, 22, 23) are arranged on Figure 1 The upper position, middle position and lower end position of the sliding door 20 are shown. In addition, the sliding door 20 is constructed so that when the sliding portion moves (slides, etc.) along the corresponding guide rails 7, 8, 9, it can slide under the guidance of the guide rails. The upper guide rail 7, the center guide rail 8 and the lower guide rail 9 extend generally in a straight line in the front-rear direction of the vehicle, but are inclined and bent toward the inner side (right side) in the vehicle width direction near the front end. Therefore, the sliding door 20 moves generally in the front-rear direction of the vehicle between the fully open position and the fully closed position, but near the fully closed position, it moves obliquely in the vehicle front-rear direction and the vehicle width direction (in the direction of the right side). Figure 1 In the figure, for convenience, the sliding door sliding in the closing direction is shown by dotted lines).

[0024] Will refer to Figure 2The structure of the lower part of the vehicle 2 is described in more detail. First, the step board 40 includes a guard plate 43 as a tread located on the upper side of the step board 40 of the vehicle. The end of the guard plate 43 on the inner side (right side) in the vehicle width direction is connected to the carpet 4c on the floor panel 4. In addition, a longitudinal beam 4s ​​is provided on the lower surface of the floor panel 4 to extend in the front-rear direction of the vehicle. In addition, the battery unit 5 is assembled at a position lower than the longitudinal beam 4s. The outer end 5E of the battery unit 5 on the outer side (left side) in the vehicle width direction protrudes outwardly of the vehicle width of the floor panel 4. The vibration-damping member 6 is provided at the end of the outer end 5E of the battery unit 5, and the door sill 30 is arranged on the left side of the lower part of the vibration-damping member 6. In addition, the outer end 5E of the battery unit 5 is covered by the step board lower panel 50 (external material) described later.

[0025] Figure 2 The step lower panel 50 shown is bent in a step-like manner so as to be joined with the floor panel 4 and the rocker 30. That is, an inner vertical wall portion 51 extending in the vehicle height direction, an upper wall portion 52 bent from the inner vertical wall portion 51 to the outer side (left side) in the vehicle width direction, and an outer vertical wall portion 53 bent from the upper wall portion 52 to the vehicle lower side are formed on the step lower panel 50. In addition, the upper end of the inner vertical wall portion 51 is bent in the vehicle width direction so as to provide an upper flange portion 510. The upper flange portion 510 is placed and joined to the lower surface of the floor panel 4. In addition, the upper portion of the outer vertical wall portion 53 extends obliquely and then extends to the vehicle lower side. In addition, the lower end of the outer vertical wall portion 53 is bent to the outer side in the vehicle width direction so as to provide a lower flange portion 530. The lower flange portion 530 is placed and joined to the upper surface of the rocker 30. The flange-shaped portion of the rocker 30 on the outer side in the vehicle width direction protrudes to the vehicle upper side of the lower flange portion 530. Furthermore, a seal strip WS filling a gap between the flange-shaped portion and the sliding door 20 is attached to an upper end position of the flange-shaped portion.

[0026] also, Figure 2The upper wall portion 52 of the step lower panel 50 shown in the figure is arranged to cover the upper surface of the outer end portion 5E of the battery unit 5. In addition, the outer vertical wall portion 53 of the step lower panel 50 is arranged to cover the upper part of the side surface of the outer end portion 5E of the battery unit 5. In addition, the end portion of the above-mentioned step 40 on the inner side (right side) in the vehicle width direction is fastened to the upper wall portion 52 of the step lower panel 50. That is, the step 40 is formed to have a substantially L-shaped cross-section, thereby being composed of a main body portion 41 extending in the vehicle width direction and a support portion 42 extending in the vehicle height direction on the inner side of the main body portion 41 in the vehicle width direction. In addition, a flange portion 420 bent inwardly in the vehicle width direction is formed at the lower end portion of the support portion 42, and the flange portion 420 is placed and fastened to the upper wall portion 52 of the step lower panel 50. Therefore, the step board 40 is supported by the step board lower panel 50 via the support portion 42 , so that the main body portion 41 of the step board 40 is arranged on the vehicle upper side of the upper wall portion 52 of the step board lower panel 50 at an appropriate interval.

[0027] Sliding door structure of vehicle in first embodiment

[0028] Figure 1 and Figure 2 The sliding door structure of the vehicle shown is a structure in which the lower side sliding portion 23 at the lower end position of the above-mentioned sliding door 20 is guided by the lower guide rail 9 provided on the step plate 40. In the above-mentioned structure, it is desirable that the lower side sliding portion 23 of the sliding door 20 is guided at an appropriate height position, that is, on the vehicle upper side of the battery unit 5, while being as compact as possible. Therefore, the present embodiment allows the lower side sliding portion 23 of the sliding door 20 to be guided at an appropriate height position by a compact structure described later. The sliding door structure of the vehicle will be described in detail below in the order of the structure on the sliding door 20 side and the structure on the rear door opening portion 10 side.

[0029] Sliding door side structure

[0030] first, Figure 1 The sliding door 20 shown includes sliding parts (21, 22, 23) located at the upper side position, the center position, and the lower end position of the sliding door 20. The upper side sliding part 21 at the upper side position and the center sliding part 22 at the middle position have substantially the same basic configuration, and therefore, the details of the upper side sliding part 21 will be described as an example. At the upper side sliding part 21, as shown in FIG. Figure 3 As shown, the upper door arm portion 21a fixed to the sliding door 20 is arranged to extend to the inner side (right side) in the vehicle width direction. Figure 3 and Figure 4 At the distal end of the upper door arm 21a, a pair of front and rear upper guide rollers 21c and a load roller 21d are provided through a bracket 21b (at Figure 4In the figure, for the sake of convenience, the figure mark corresponding to one upper guide roller is shown). A front and rear vertical shaft portion A1 extending in the vehicle height direction is provided at the bracket 21b, and the upper guide roller 21c is axially supported by the front and rear vertical shaft portion A1 in a rotatable manner. In addition, a horizontal shaft portion A2 extending in the vehicle width direction is provided at the center of the bracket 21b in the front and rear directions. In addition, in a state where the load roller 21d protrudes to the lower side of the vehicle of the front and rear upper guide rollers 21c, the load roller 21d is axially supported by the horizontal shaft portion A2 in a rotatable manner. Therefore, the upper sliding portion 21 is provided with the front and rear upper guide rollers 21c and the load roller 21d as the guided portions, that is, two types of sliding components. In addition, Figure 1 The illustrated central slide 22 also includes a pair of front and rear upper guide rollers and a load roller (reference numerals not shown).

[0031] Lower sliding part

[0032] Reference Figure 1 and Figure 2 , the lower sliding portion 23 is provided on the lower end side of the sliding door 20, so as to be arranged on the lower side of the vehicle of the above-mentioned upper sliding portion 21 and the center sliding portion 22. The lower door arm portion 23a of the lower sliding portion 23 is formed to have a substantially L-shaped cross section, so as to be provided with a vertical arm portion 231 fixed to the sliding door 20 and a horizontal arm portion 232 extending from the vertical arm portion 232 to the inner side (right side) in the vehicle width direction. The lower end portion 233 of the vertical arm portion 231 is bent toward the inner side in the vehicle width direction, and the horizontal arm portion 232 is fastened to the bent lower end portion 233. In addition, at the distal end portion of the horizontal arm portion 232, as a guided portion, only the lower guide roller 23c, that is, only one kind of sliding member, is axially supported in a rotatable manner by the lower vertical shaft portion 23b extending to the upper side of the vehicle.

[0033] Rear door opening side structure

[0034] Next, we will describe Figure 1 The upper guide rail 7 and the center guide rail 8 are shown. The guide rails 7 and 8 have the same basic structure, so the details of the upper guide rail 7 will be described as an example. Figure 3As shown, the upper guide rail 7 corresponding to the upper guide rail in the present invention is formed into a hollow column shape with an opening on the outer side (left side) in the vehicle width direction, and is arranged to extend in the sliding direction of the sliding door 20. In addition, on the upper guide rail 7, an opening communicating with the outside on the outer side in the vehicle width direction is formed at the same height position as the above-mentioned upper sliding portion 21. In addition, the upper portion 70 of the upper guide rail 7 is formed in a substantially inverted U shape, and therefore, the upper guide rail 7 is configured to be able to restrict the movement of the front and rear upper guide rollers 21c of the upper sliding portion 21 from the vehicle width direction. In addition, the vertical plate portion 71 on the inner side (right side) in the vehicle width direction of the upper guide rail 7 is arranged to extend toward the lower side of the vehicle, and in addition, the lower end of the vertical plate portion 71 is bent substantially orthogonally, thereby forming a lower plate portion 72 protruding toward the outer side in the vehicle width direction. In addition, the load roller 21d of the upper sliding portion 21 abuts on the support plate portion 73 provided on the lower plate portion 72 of the upper guide rail 7 and having a substantially L-shaped cross section, and slides in this state.

[0035] Figure 3 The upper rail 7 shown may be fixed to extend along the roof rail 100 forming the upper portion of the rear door opening 10. The side outer panel 101 is fixed to the vehicle width direction outer side (left side) of the roof rail 100 to extend in the vehicle front-rear direction. Furthermore, the upper rail 7 may be fastened and fixed to an appropriate position on the side outer panel 101 by a fastener BM. In this case, the upper rail 7 may be fastened to the side outer panel 101 and to a reinforcement 102 placed on the back side of the side outer panel 101. Furthermore, the upper portion of the reinforcement 102 is formed into a plate shape extending to the vehicle width direction inner side (right side), and is fixed to the roof rail 100 side.

[0036] Lower rail

[0037] Next, if Figure 2 The lower rail 9, which corresponds to the lower rail in the present invention, is integrally provided on the lower surface of the step plate 40 as described above. Thus, the lower rail 9 is arranged on the lower side of the vehicle inside the rear door opening 10 (in the housing of the rear door opening 10). Figure 5 As shown, the lower rail 9 is formed by a left wall portion 9a, a right wall portion 9b and an upper wall portion 9c to have a substantially U-shaped cross section, and the upper wall portion 9c is formed integrally with the lower surface of the step plate 40. In addition, the vehicle lower side of the lower rail 9 is opened, so that the lower guide roller 23c of the above-mentioned lower side sliding portion 23 is fitted into the lower rail 9 from the vehicle height direction. Thus, when sliding, the movement of the lower guide roller 23c in the vehicle width direction is restricted by the left wall portion 9a and the right wall portion 9b.

[0038] The structure and function of the sliding door structure of the vehicle

[0039] exist Figure 2In the vehicle 2 shown, it is desirable that the lower sliding portion 23 of the sliding door 20 is guided at an appropriate height position while being as compact as possible. Therefore, in the sliding door structure of the vehicle, the load of the sliding door 20 when sliding is received on the upper side of the vehicle of the lower sliding portion 23, whereby the lower sliding portion 23 is supported by the sliding door 20 and arranged at a position H1 on the upper side of the vehicle of the battery unit 5. In addition, the lower guide rail 9 that guides the guided portion of the lower sliding portion 23 is provided on the lower side of the inner side of the rear door opening portion 10 so as to extend in the sliding direction. In addition, the guided portion of the lower sliding portion 23 is composed only of a lower guide roller 23c (sliding member) axially supported by a lower vertical shaft portion 23b extending to the upper side of the vehicle so as to slide while being restricted from the vehicle width direction by the lower guide rail 9.

[0040] That is, in the above-mentioned sliding door structure of the vehicle, Figure 1 and Figure 3 The upper rail 7 shown accommodates the load roller 21d, thereby receiving the load of the sliding door 20 provided with the load roller 21d. Figure 1 The central guide rail 8 shown has substantially the same configuration as the upper guide rail 7. Therefore, the central guide rail 8 is also configured to receive the load of the sliding door 20, and the front and rear guide rollers and load rollers (not shown) of the central sliding portion 22 slide. Figure 2 The illustrated lower sliding portion 23 is supported by the slide door 20 , and is arranged at an appropriate height position, that is, at a height position H1 higher than the position H0 of the battery unit 5 .

[0041] also, Figure 5 The lower sliding portion 23 shown includes only the lower guide roller 23c (a sliding member) axially supported by the lower vertical shaft portion 23b as a guided portion, so that the dimension S2 in the vehicle height direction is compact. Therefore, the load roller is omitted, and the lower sliding portion 23 is compacted in the vertical direction, so that the vertical distance D1 between the main body 41 of the step board 40 and the step board lower panel 50 can be shortened. As a result, the height position H2 of the step board 40 can be reduced as much as possible, and high riding and descending performance of the occupant can be ensured. In particular, in the above-mentioned configuration, even when the distance D1 between the main body 41 and the step board lower panel 50 is shortened, the lower sliding portion 23 can be arranged between the main body 41 and the step board lower panel 50 in a good fitting manner. In addition, since the lower sliding portion 23 is configured to slide, and the lower guide roller 23c is restricted in the vehicle width direction when sliding, the lower guide roller 23c is appropriately guided by the action of the lower guide rail 9.

[0042] also, Figure 5 The lower sliding portion 23 shown is configured not to receive the load of the sliding door 20. Figure 3 and Figure 5, this configuration enables the thickness dimension S1 of the lower door arm portion 23a (horizontal arm portion 232) to be set smaller than the thickness dimension S0 of the other door arm portion (upper door arm portion 21a, etc.), and the increase in vehicle weight can be suppressed. The length dimension L1 of the upper door arm portion 21a in the vehicle width direction is smaller than the length dimension L2 of the horizontal arm portion 232. Therefore, even when the thickness of the upper door arm portion 21a having a relatively short length is increased, the increase in weight of the vehicle 2 is suppressed as much as possible.

[0043] As described above, in the sliding door structure of the vehicle, the lower sliding portion 23 can be supported by the sliding door 20 and can be arranged on the vehicle upper side of the battery unit 5 (at an appropriate height position H1). In addition, the lower sliding portion 23 includes only the lower guide roller 23c (sliding member) axially supported by the shaft portion extending to the upper side of the vehicle as a guided portion guided by the lower guide rail 9, and is compact in the vehicle height direction. Therefore, the present embodiment allows the lower sliding portion 23 of the sliding door 20 to be guided at an appropriate height position while being as compact as possible.

[0044] Furthermore, in the present embodiment, the load of the sliding door 20 when sliding is received by the upper guide rail 7 (upper side guide rail). Furthermore, in the present embodiment, the lower guide rail 9 and the lower side sliding portion 23 are arranged at a height position higher than the step board lower panel 50 (external material), that is, a more appropriate height position H0. Furthermore, in the present embodiment, the lower guide rail 9 and the lower side sliding portion 23 are arranged between the step board 40 and the step board lower panel 50 in a well-fitting manner. Furthermore, the vertical compactness of the lower side sliding portion 23 makes it easy to adjust the height position H2 of the step board 40 and ensure the boarding and alighting performance.

[0045] Sliding door structure of vehicle in second embodiment

[0046] Next, a vehicle sliding door structure in a second embodiment will be described. In the vehicle sliding door structure in this embodiment, the same configurations as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof are omitted. Figure 6 The sliding door structure of the vehicle in the second embodiment shown has substantially the same basic construction as the sliding door structure of the vehicle in the first embodiment, but differs from the sliding door structure of the vehicle in the first embodiment in that the lower sliding portion 23X is provided with a position retaining mechanism 60 described later.

[0047] The position holding mechanism 60 is a mechanism for restricting the lower guide roller 23c (sliding member) from moving toward the lower side of the vehicle, and can be constituted by the door arm portion 25. Figure 6 and Figure 7, the door arm portion 25 as the position holding mechanism 60 includes a fixed side plate portion 25x, a movable side plate portion 25y and a hinge portion 25z. The fixed side plate portion 25x is formed into a strip plate shape that is longer in the vertical direction and is fixed to the lower end side of the sliding door 20. In addition, the movable side plate portion 25y is connected to the lower edge of the fixed side plate portion 25x through the hinge portion 25z. The hinge portion 25z is a ginglyform portion that connects the lower edge of the fixed side plate portion 25x and the left edge of the movable side plate portion 25y, and includes an axle pin AB extending in the front-rear direction of the vehicle. In addition, the movable side plate portion 25y is formed into a strip plate shape that extends from the hinge portion 25z to the inner side (right side) in the vehicle width direction, and the lower guide roller 23c is axially supported by the distal end of the movable side plate portion 25y through the lower vertical shaft portion 23b. Furthermore, the distal end portion of the movable side plate portion 25y can pivot up and down relative to the fixed side plate portion 25x about the shaft pin AB of the hinge portion 25z, and furthermore, is biased to the vehicle upper side by the biasing force of the biasing material TM attached to the shaft pin AB.

[0048] Furthermore, in the present embodiment, the step board 40 has an inclined posture in which the step board 40 gradually inclines toward the lower side of the vehicle toward the outer side (left side) in the vehicle width direction, as shown in FIG. Figure 6 As shown. In addition, the movable side plate portion 25y of the door arm portion 25, which serves as a position holding mechanism 60, extends obliquely along the step board 40. In addition, the lower guide roller 23c of the lower side sliding portion 23 is assembled into the lower guide rail 9 provided on the lower surface of the step board 40. Furthermore, in the above-mentioned structure, the position holding mechanism 60 makes it possible to more appropriately maintain the height position H1 of the lower side sliding portion 23X (the distal end portion) to improve space efficiency, and to more appropriately lower the height position H2 of the step board 40. Furthermore, the unintentional movement of the lower guide roller 23c to the lower side of the vehicle is suppressed, so that various components can be placed on the upper side of the vehicle on the lower guide roller 23c. For example, in Figure 6 In the illustrated configuration, at the time of the installation work of the tread plate 40, by fitting the lower guide rail 9 of the tread plate 40 into the lower guide roller 23c that maintains the height position, the height position of the tread plate 40 can be easily adjusted. Therefore, in the present embodiment, the position holding mechanism 60 makes it possible to more appropriately maintain the height position of the lower guide roller 23c. Therefore, in the case where the tread plate 40 is installed on the vehicle upper side of the lower guide roller 23c, it is easier to adjust the height position of the tread plate 40.

[0049] The sliding door structure of the vehicle in this embodiment is not limited to the above-mentioned embodiment, and various other embodiments can be adopted. For example, in the sliding door structure of the vehicle in the embodiment, the lower sliding part and the lower guide rail are arranged between the step board and the lower panel of the step board, but the arrangement position of the lower sliding part and the lower guide rail is not limited. For example, in addition to the step board, various upper side components can be arranged on the upper side of the vehicle of the lower guide rail, etc., in which case it is also easy to adjust the height position of the upper side components. In addition, various lower side components can be placed on the lower side of the vehicle of the lower sliding part, and the lower side components can be omitted as needed. The step board and the lower guide rail can be constructed as separate components. In addition, the construction of the position holding mechanism can also be set at an appropriate time, and the hinge part can be set at a moderate position of the door arm in the vehicle width direction.

[0050] In addition, in the embodiment, as the configuration of the lower part of the vehicle, for example, the configuration of the step lower panel, the battery unit, and the door sill has been described, but these configurations are not limited. In addition, the configuration of the step can also be changed when appropriate. In addition, the configuration and movement trajectory of the sliding door can also be changed when appropriate. When appropriate, the above-mentioned configurations in the first embodiment and the second embodiment can be combined.

Claims

1. A sliding door structure of a vehicle, characterized in that include: a sliding door configured to slide to open and close a door opening of the vehicle; a lower sliding portion disposed on a lower end portion side of the sliding door; as well as A battery unit is arranged on a vehicle underside of a floor panel of the vehicle, wherein: A load when the sliding door slides is received on the vehicle upper side of the lower sliding portion, and the lower sliding portion is supported by the sliding door and arranged at a position on the vehicle upper side of the battery unit; A lower guide rail is provided at a lower side of the inner side of the door opening portion to extend in a sliding direction, the lower guide rail guiding a guided portion of the lower sliding portion; and The guided portion is constituted by only a sliding member axially supported by a shaft portion extending to the vehicle upper side so as to slide while being restricted from the vehicle width direction by the lower side guide rail.

2. The sliding door structure of a vehicle according to claim 1, characterized in that It also includes an upper sliding portion disposed on the upper portion of the sliding door, wherein: The upper sliding portion is disposed on the upper side of the vehicle of the lower sliding portion; and An upper guide rail is provided on an upper side of the door opening so as to extend in the sliding direction, and the upper guide rail slides a guided portion of the upper sliding portion while receiving the load of the sliding door.

3. The sliding door structure of a vehicle according to claim 1, characterized in that The lower guide rail and the lower slide portion are arranged on the vehicle upper side of an exterior material covering the vehicle upper side of the battery unit.

4. The sliding door structure of a vehicle according to claim 3, characterized in that The lower guide rail and the lower slide portion are arranged on the vehicle lower side of a tread surface of a step board provided on the vehicle upper side of the exterior material.

5. The sliding door structure of a vehicle according to any one of claims 1 to 4, characterized in that The lower sliding portion is provided with a position holding mechanism that restricts movement of the sliding member to the lower side of the vehicle.

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