Lower guide rail and sliding door device

Abstract

To provide a bottom guide rail that suppresses deterioration of an appearance of a slide door device.SOLUTION: A bottom guide rail that supports a slide door having a door part, a lower frame fixed on the lower end of the door part, and a stopper member fixed on the lower end of the lower frame, in an opening / closing direction orthogonal to a vertical direction, comprises: a guide rail main body extending in the opening / closing direction; and a cover member mounted on the guide rail main body. The guide rail main body has: a first storage part that includes an opening that opens upward in the vertical direction, and stores the lower frame inside; and a second storage part arranged below the first storage part that stores at least a portion of the stopper member inside. In a first direction orthogonal to both the vertical direction and the opening / closing direction, the internal dimension of the first storage part is larger than the internal dimension of the second storage part. The cover member extends in the opening / closing direction and blocks a portion of the opening.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a lower guide rail and a sliding door device. [Background technology]

[0002] There is known a sliding door device that opens and closes a passageway by sliding a sliding door in a direction perpendicular to the vertical direction. For example, Patent Document 1 describes a sliding door device in which a lower frame is fixed to the lower end of the door, and a guide part fixed to the underside of the lower frame is inserted into a guide rail groove part of a rail main body to prevent the door from swinging. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-203252 Summary of the Invention [Problem to be solved by the invention]

[0004] In the sliding door device as described above, the lower frame is exposed to the outside, so that the lower frame is easily visible to passersby and the like, which may spoil the aesthetic appearance of the sliding door device.

[0005] In view of the above circumstances, one aspect of the present invention aims to provide a lower guide rail that can prevent the lower frame from being exposed to the outside, thereby preventing the aesthetic appearance of the sliding door device from being damaged, and a sliding door device that is equipped with such a lower guide rail. [Means for solving the problem]

[0006] One aspect of the lower guide rail of the present invention is a lower guide rail that supports a sliding door, which has a door section, a lower frame fixed to a vertically lower end of the door section, and a vibration prevention member fixed to a vertically lower end of the lower frame, so that the sliding door can move in an opening and closing direction perpendicular to the vertical direction, and includes a guide rail main body that extends along the opening and closing direction, and a cover member attached to the guide rail main body, wherein the guide rail main body has an opening that opens to the upper side in the vertical direction and has a first storage section that stores the lower frame therein, and a second storage section that is arranged vertically below the first storage section and stores at least a portion of the vibration prevention member therein, and in a first direction that is perpendicular to both the vertical direction and the opening and closing direction, the internal dimensions of the first storage section are larger than the internal dimensions of the second storage section, and the cover member extends in the opening and closing direction to block a portion of the opening.

[0007] The inner surfaces of the first storage section on both sides in the first direction may be arranged with a gap between them and the lower frame, and the second storage section may be configured to support the anti-vibration member so that it can slide in the opening and closing direction.

[0008] The cover member may have a first cover member, the first cover member extending along the opening / closing direction, the first cover member being removably attached to the guide rail main body portion, and the first cover member may have a pair of cover portions arranged opposite each other with a gap in the first direction.

[0009] The cover member may have a second cover member, the second cover member extending along the opening / closing direction, the first cover member and the second cover member arranged side by side in the opening / closing direction, the second cover member fixed to the guide rail main body portion, and the second cover member may have a pair of cover portions arranged opposite each other with a gap in the first direction.

[0010] One aspect of the sliding door device of the present invention comprises the above-mentioned lower guide rail, a fixed wall extending along a plane perpendicular to the first direction, and a sliding door supported by the lower guide rail so as to be movable in the opening and closing direction and movable in the opening and closing direction relative to the fixed wall, wherein when viewed in the first direction, the first cover member overlaps the fixed wall. [Effects of the Invention]

[0011] According to one aspect of the present invention, the lower frame is prevented from being exposed to the outside, thereby preventing the aesthetic appearance of the sliding door device from being impaired. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a front view showing a sliding door device according to an embodiment of the present invention; [Figure 2] 1 is a left side view showing a sliding door device according to an embodiment of the present invention; [Figure 3] 3 is a cross-sectional view showing the lower guide rail according to the embodiment, taken along line III-III in FIG. 1; [Figure 4] 4 is a cross-sectional view showing the lower guide rail according to the embodiment, taken along line IV-IV in FIG. 1. FIG. [Figure 5] FIG. 10 is a cross-sectional view showing a lower guide rail of a first modified example of the embodiment. [Figure 6] FIG. 10 is a cross-sectional view showing a lower guide rail of a second modified example of the embodiment. [Figure 7] FIG. 10 is a cross-sectional view showing a lower guide rail of a third modified example of the embodiment. [Figure 8] FIG. 10 is a cross-sectional view showing a lower guide rail of a fourth modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] A sliding door device 1 according to an embodiment of the present invention will be described below with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiments, and can be modified as desired within the scope of the technical concept of the present invention. In addition, in the following drawings, the scale and number of components in the structures shown in the drawings may differ from the actual structure in order to make each component easier to understand.

[0014] In the following description, the figures will appropriately show an XYZ coordinate system as a three-dimensional Cartesian coordinate system. In the XYZ coordinate system, the Z axis direction is the vertical direction. The +Z side is the upper side in the vertical direction, and the -Z side is the lower side in the vertical direction. In the following description, the upper side in the vertical direction will simply be referred to as the "upper side," and the lower side in the vertical direction will simply be referred to as the "lower side."

[0015] The X-axis direction is a direction perpendicular to the Z-axis direction and is the opening / closing direction in which the door portion 20 of the sliding door device 1 is opened and closed. In the following embodiments, the +X side is the right side of the sliding door device 1, and the -X side is the left side of the sliding door device 1. In the following description, the right side of the sliding door device 1 is simply referred to as the "right side," and the left side of the sliding door device 1 is simply referred to as the "left side."

[0016] The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction, and is the front-to-rear direction of the sliding door device 1. In the following embodiments, the +Y side is the front side of the sliding door device 1, and the -Y side is the rear side of the sliding door device 1. In the following description, the front side of the sliding door device 1 will be simply referred to as the "front side," and the rear side of the sliding door device 1 will be simply referred to as the "rear side." The opening / closing direction and the front-to-rear direction are horizontal directions perpendicular to the vertical direction. Note that the terms upper side, lower side, right side, left side, front side, and rear side are simply names used to describe the relative positional relationships of the various parts, and the actual positional relationships may be other than those indicated by these names.

[0017] In the following description, a first direction D1 is shown in each drawing as appropriate. In this embodiment, the first direction D1 is a direction parallel to the front-rear direction (Y-axis direction). In the following description, the first direction D1 may be referred to as the front-rear direction.

[0018] Fig. 1 is a front view showing a sliding door device 1 of this embodiment. Fig. 1 shows the sliding door device 1 in a closed state where a double-swing sliding door 6 is closed. Fig. 2 is a left side view showing the sliding door device 1 of this embodiment.

[0019] The sliding door device 1 of this embodiment is installed inside a building or at the boundary between the inside and outside of a building. The sliding door device 1 is a double-door sliding door device in which the sliding door 6 opens and closes in an opening / closing direction (X-axis direction). In this embodiment, the sliding door device 1 is an electric sliding door device in which the sliding door 6 moves in the opening / closing direction by supplying power to a door drive unit 10 (described later). Note that the sliding door device 1 may also be a manual sliding door device in which the sliding door 6 is manually moved in the opening / closing direction. The sliding door device 1 opens and closes a passage 80 that opens in the front-to-rear direction (Y-axis direction) by moving the sliding door 6 in the opening / closing direction. The sliding door device 1 is fixed to a top surface 81, a right wall surface 82, a left wall surface 83, and a floor surface 84. The sliding door device 1 includes a door frame 5, an upper guide rail 7, a storage unit 9, a control unit 70, a door drive unit 10, a sliding door 6, and a fixed wall 30.

[0020] As shown in FIG. 1, the door frame 5 is a frame body having a substantially rectangular shape when viewed in the front-to-rear direction (Y-axis direction). The interior of the door frame 5 is open in the front-to-rear direction. The door frame 5 holds an upper guide rail 7, a storage section 9, a fixed wall 30, and a sliding door 6. The door frame 5 has a right side portion 5a, a left side portion 5b, an upper side portion 5c, and a lower guide rail 8.

[0021] The right side portion 5a is columnar and extends in the vertical direction (Z-axis direction). The right side portion 5a is fixed to the right wall surface 82. The lower end of the right side portion 5a is embedded in the floor surface 84. The left side portion 5b is columnar and extends in the vertical direction (Z-axis direction). The left side portion 5b is fixed to the left wall surface 83. The lower end of the left side portion 5b is embedded in the floor surface 84. The upper side portion 5c is columnar and extends in the opening / closing direction (X-axis direction). The upper side portion 5c is fixed to the top surface 81. The right side (+X side) end of the upper side portion 5c is connected to the upper end of the right side portion 5a. The left side (-X side) end of the upper side portion 5c is connected to the upper end of the left side portion 5b.

[0022] As shown in FIG. 1, the lower guide rail 8 is a rail that extends in the opening / closing direction (X-axis direction). The lower guide rail 8 supports the sliding door 6 so that it can move in the opening / closing direction. The lower guide rail 8 is embedded inside the floor surface 84. The right end (+X side) of the lower guide rail 8 is connected to the lower end of the right side portion 5a. The left end (-X side) of the lower guide rail 8 is connected to the lower end of the left side portion 5b. The detailed configuration of the lower guide rail 8 will be described later.

[0023] The upper guide rail 7 is a rail that extends in the opening / closing direction (X-axis direction). The upper guide rail 7 is open on the upper side and has a groove-shaped recess (not shown) that extends in the opening / closing direction (X-axis direction). In the vertical direction (Z-axis direction), the upper guide rail is disposed above the door section 20 and below the upper section 5c. The right end (+X side) of the upper guide rail 7 is connected to the right section 5a. The left end (-X side) of the upper guide rail is connected to the left section 5b.

[0024] As shown in FIG. 1, the storage unit 9 is a substantially rectangular box-like shape extending in the opening / closing direction (X-axis direction). The storage unit 9 is disposed above the upper guide rail 7. The storage unit 9 is fixed to the front surface (+Y side) of a cross beam (not shown) provided on the top surface 81. The storage unit 9 accommodates a control unit 70 and a door drive unit 10.

[0025] The control unit 70 is a control device that controls the door driving unit 10. The control unit 70 is a rectangular box that houses a CPU, ROM, etc. (not shown). The CPU, ROM, etc. are configured as a computer system. The control unit 70 is electrically connected to an external power source (not shown).

[0026] The door driving unit 10 moves the sliding door 6 in the opening / closing direction (X-axis direction). As shown in FIG. 1, the door driving unit 10 is housed inside the housing 9. The door driving unit 10 includes a driving unit 11, a driving pulley 12, a driven pulley 13, and a driving member 14.

[0027] The drive unit 11 rotates the drive pulley 12. In this embodiment, the drive unit 11 is arranged on the left side (-X side) of the housing 9. The drive unit 11 has a drive motor and a speed reduction mechanism (not shown). The drive motor is electrically connected to the control unit 70, and the operation of the drive motor is controlled by the control unit 70. The rotational torque of the drive motor is transmitted to the drive pulley 12 via the speed reduction mechanism. The configuration of the drive motor and the speed reduction mechanism are not particularly limited, and known motors and speed reduction mechanisms can be used.

[0028] As shown in FIG. 1, the drive pulley 12 is rotatable about a drive axis J1 that is parallel to the front-rear direction (Y-axis direction). In this embodiment, the drive axis J1 is a virtual axis. The drive pulley 12 has a generally circular plate shape with the drive axis J1 as its center. The outer circumferential surface of the drive pulley 12 is provided with first grooves (not shown) that are recessed inward. A plurality of first grooves are provided at equal intervals along the outer circumferential surface of the drive pulley 12.

[0029] The driven pulley 13 is disposed in the right side (+X side) of the housing 9. The driven pulley 13 is rotatable about a driven axis J2 that is parallel to the front-rear direction (Y-axis direction). In this embodiment, the driven axis J2 is a virtual axis. The driven pulley 13 has a substantially circular plate shape centered on the driven axis J2. An inwardly recessed second groove (not shown) is provided on the outer peripheral surface of the driven pulley 13. A plurality of second grooves are provided at equal intervals along the outer peripheral surface of the driven pulley 13.

[0030] The drive member 14 is an annular timing belt. Alternatively, the drive member 14 may be an annular chain-like member. As shown in FIG. 1, the drive member 14 is wound around the drive pulley 12 and the driven pulley 13. The inner peripheral surface of the drive member 14 is provided with protrusions (not shown) that protrude inward. A plurality of protrusions are provided at equal intervals along the inner peripheral surface of the drive member 14. Some of the protrusions engage with the first groove of the drive pulley 12, and when the drive pulley 12 rotates around the drive axis J1, the drive member 14 is driven in the opening / closing direction (X-axis direction). Another portion of the protrusions engages with the second groove of the driven pulley 13, and the driven pulley 13 rotates in response to the rotation of the drive pulley 12 via the drive member 14. This allows the drive member 14 to move in the opening / closing direction.

[0031] 1, the sliding door 6 is a double-door that opens and closes in the opening and closing direction (X-axis direction). The sliding door 6 has a door section 20, an upper frame 21, a first door hanger 22a, a second door hanger 22b, a first door roller 23a, a second door roller 23b, a lower frame 25, and a vibration prevention member 26.

[0032] The door section 20 is movable in the opening and closing direction (X-axis direction). As shown in FIG. 2, the upper end of the door section 20 is located below the upper guide rail 7. The lower end of the door section 20 is located below the floor surface 84 and is housed inside the lower guide rail 8. In this embodiment, the door section 20 is made of glass. The door section 20 may also be made of other materials such as resin and metal. As shown in FIG. 1, the door section 20 has a first door 20a and a second door 20b.

[0033] The first door 20a and the second door 20b are each shaped like a substantially rectangular plate. In this embodiment, the first door 20a and the second door 20b have the same shape. The first door 20a and the second door 20b may have different shapes. The plate surfaces of the first door 20a and the second door 20b each face the front-to-rear direction (Y-axis direction). The first door 20a is disposed on the left side (-X side) of the second door 20b. The first door 20a and the second door 20b are disposed side by side along the opening / closing direction (X-axis direction).

[0034] When the first door 20a moves to the left (-X side) and the second door 20b moves to the right (+X side), the sliding door 6 opens. Although not shown, in the open state where the sliding door 6 is in the most open state, the left end of the first door 20a faces closely to the left side portion 5b in the opening / closing direction (X-axis direction), and the right end of the second door 20b faces closely to the right side portion 5a in the opening / closing direction. When the first door 20a moves to the right and the second door 20b moves to the left, the sliding door 6 closes. In the closed state where the sliding door 6 is closed, the right end of the first door 20a faces closely to the left end of the second door 20b in the opening / closing direction. When the sliding door 6 is in the closed state, the first door 20a and the second door 20b may come into contact with each other.

[0035] 1, the upper frame 21 is fixed to the upper end of the door section 20. The upper frame 21 has a first upper frame 21a and a second upper frame 21b.

[0036] The first upper frame 21a is fixed to the upper end of the first door 20a. The first upper frame 21a has a generally rectangular parallelepiped shape extending in the opening / closing direction (X-axis direction). The dimension of the first upper frame 21a in the opening / closing direction is generally the same as the dimension of the first door 20a in the opening / closing direction. In the opening / closing direction, the position of the right end (+X side) of the first upper frame 21a is generally the same as the right end of the first door 20a. As shown in FIG. 2, a first recess 21a1 recessed upward is provided on the surface facing downward of the first upper frame 21a. The first recess 21a1 extends in the opening / closing direction from the left end (-X side) of the first upper frame 21a to the right end. The upper end of the first door 20a is inserted into the first recess 21a1. The two inner side surfaces of the first recess 21a1 facing the front-rear direction (Y-axis direction) and both side surfaces of the first door 20a facing the front-rear direction are fixed by adhesive.

[0037] As shown in FIG. 1, the second upper frame 21b is fixed to the upper end of the second door 20b. In this embodiment, the shape of the second upper frame 21b is the same as the shape of the first upper frame 21a. In the opening and closing direction (X-axis direction), the position of the left end (-X side) of the second upper frame 21b is approximately the same as the left end of the second door 20b. Although not shown, a second recess recessed upward is provided on the surface facing downward of the second upper frame 21b, and the upper end of the second door 20b is inserted into the second recess. Two inner surfaces facing the front-rear direction (Y-axis direction) of the second recess are fixed to both side surfaces facing the front-rear direction of the second door 20b by adhesive.

[0038] As shown in FIG. 1, the first door hanger 22a is fixed to the upper end of the first upper frame 21a. As shown in FIG. 2, the first door hanger 22a is an L-shaped plate when viewed in the opening / closing direction (X-axis direction). The first door hanger 22a protrudes upward from the first upper frame 21a. Although not shown, the first door hanger 22a is connected to a portion of the driving member 14 that is located above the driving pulley 12 and the driven pulley 13. As shown in FIG. 1, in this embodiment, two first door hangers 22a are provided. The first door hangers 22a are arranged at intervals from each other in the opening / closing direction.

[0039] The second door hanger 22b is fixed to the upper end of the second upper frame 21b. In this embodiment, the second door hanger 22b has the same shape as the first door hanger 22a. The second door hanger 22b protrudes upward from the second upper frame 21b. Although not shown, the second door hanger 22b is connected to a portion of the drive member 14 that is located below the drive pulley 12 and the driven pulley 13. In this embodiment, two second door hangers 22b are provided. The second door hangers 22b are arranged at intervals from each other in the opening / closing direction.

[0040] The first door roller 23a is supported by the first door hanger 22a so as to be rotatable about a first door roller axis J3 that is parallel to the front-rear direction (Y-axis direction). In this embodiment, the first door roller axis J3 is an imaginary axis. In this embodiment, two first door rollers 23a are provided. Each first door roller 23a is substantially circular and has a center on the first door roller axis J3. Each first door roller 23a is inserted into a recess (not shown) in the upper guide rail 7. When the drive unit 11 drives the drive member 14, each first door roller 23a travels in the opening / closing direction (X-axis direction) while rotating about the first door roller axis J3 via the first door hanger 22a. This causes the first door 20a to move in the opening / closing direction.

[0041] The second door roller 23b is supported by the second door hanger 22b so as to be rotatable about a second door roller axis J4 that is parallel to the front-rear direction (Y-axis direction). In this embodiment, the second door roller axis J4 is an imaginary axis. In this embodiment, two second door rollers 23b are provided. Each second door roller 23b is substantially disk-shaped and has its center on the second door roller axis J4. Each second door roller 23b is inserted into a recess in the upper guide rail 7, and when the drive unit 11 drives the drive member 14, each second door roller 23b travels in the opening / closing direction (X-axis direction) while rotating about the second door roller axis J4. This causes the second door 20b to move in the opening / closing direction.

[0042] 1, the lower frame 25 is fixed to the vertically lower end of the door section 20. The lower frame 25 has a first lower frame 25a and a second lower frame 25b.

[0043] The first lower frame 25a is fixed to the lower end of the first door 20a. The first lower frame 25a has a generally rectangular parallelepiped shape extending in the opening / closing direction (X-axis direction). The dimension of the first lower frame 25a in the opening / closing direction is generally the same as the dimension of the first door 20a in the opening / closing direction. In the opening / closing direction, the position of the right end (+X side) of the first lower frame 25a is generally the same as the right end of the first door 20a. As shown in FIG. 2, a third recess 25a1 recessed downward is provided on the surface facing upward of the first lower frame 25a. The third recess 25a1 extends in the opening / closing direction from the left end (-X side) of the first lower frame 25a to the right end. The lower end of the first door 20a is inserted into the third recess 25a1. The two inner side surfaces of the third recess 25a1 facing the front-rear direction (Y-axis direction) and both side surfaces of the first door 20a facing the front-rear direction are fixed by adhesive.

[0044] As shown in FIG. 1, the second lower frame 25b is fixed to the lower end of the second door 20b. In this embodiment, the shape of the second lower frame 25b is the same as the shape of the first lower frame 25a. In the opening and closing direction, the position of the left end (-X side) of the second lower frame 25b is substantially the same as the left end of the second door 20b. Although not shown, a fourth recess recessed downward is provided on the surface facing upward of the second lower frame 25b, and the lower portion of the second door 20b is inserted into the fourth recess. Two inner surfaces facing the front-rear direction (Y-axis direction) of the fourth recess are fixed to both side surfaces facing the front-rear direction of the second door 20b by adhesive.

[0045] As shown in Fig. 1, the anti-vibration member 26 is fixed to the lower end of the lower frame 25 in the vertical direction with a screw 91. The anti-vibration member 26 protrudes downward from the lower frame 25. In this embodiment, the anti-vibration member 26 is made of resin. The anti-vibration member 26 has a pair of first anti-vibration members 26a and a pair of second anti-vibration members 26b.

[0046] The pair of first anti-vibration members 26a are each fixed to the lower end of the first lower frame 25a. Each first anti-vibration member 26a protrudes downward from the first lower frame 25a. As shown in FIGS. 1 and 2, each first anti-vibration member 26a is substantially rectangular parallelepiped-shaped. As shown in FIG. 1, each first anti-vibration member 26a is disposed at an interval from each other along the opening / closing direction (X-axis direction).

[0047] The pair of second anti-vibration members 26b are each fixed to the lower end of the second lower frame 25b. Each second anti-vibration member 26b protrudes downward from the second lower frame 25b. Each second anti-vibration member 26b has the same shape as the first anti-vibration member 26a. Each second anti-vibration member 26b is arranged at an interval from each other along the opening / closing direction (X-axis direction).

[0048] The fixed wall 30 blocks a part of the interior of the door frame 5 in the front-rear direction (Y-axis direction). As shown in FIG. 1 , the fixed wall 30 extends in the front-rear direction (Y-axis direction), i.e., along a plane perpendicular to the first direction D1. The fixed wall 30 is fixed to the door frame 5. Therefore, the sliding door 6 is movable in the opening / closing direction (X-axis direction) relative to the fixed wall 30. The fixed wall 30 has a first fixed wall 31 and a second fixed wall 32.

[0049] The first fixed wall 31 blocks a portion of the left side (-X side) of the interior of the door frame 5. The first fixed wall 31 is shaped like a substantially rectangular plate. The plate surface of the first fixed wall 31 faces the front-rear direction (Y-axis direction). The left end of the first fixed wall 31 is fixed to the left side portion 5b. The upper end of the first fixed wall 31 is fixed to the upper guide rail 7. The lower end of the first fixed wall 31 is embedded in the floor surface 84. The right end (+X side) of the first fixed wall 31 is located to the right of the left end of the first door 20a when the sliding door 6 is in the closed state. Therefore, when the sliding door 6 is in the closed state, the left side of the interior of the door frame 5 is blocked in the front-rear direction by the first door 20a and the first fixed wall 31. The dimension of the first fixed wall 31 in the opening / closing direction (X-axis direction) is greater than the dimension of the first door 20a in the opening / closing direction. Although not shown, when the sliding door 6 is in an open state, the right end of the first fixed wall 31 is located to the right of the right end of the first door 20a.

[0050] The second fixed wall 32 blocks a portion of the right side (+X side) of the interior of the door frame 5. The second fixed wall 32 is shaped like a substantially rectangular plate. The plate surface of the second fixed wall 32 faces the front-to-rear direction (Y-axis direction). The right end of the second fixed wall 32 is fixed to the right side portion 5a. The upper end of the second fixed wall 32 is fixed to the upper guide rail 7. The lower end of the second fixed wall 32 is embedded in the floor surface 84. The left end (-X side) of the second fixed wall 32 is located to the left of the right end of the second door 20b when the sliding door 6 is in the closed state. Therefore, when the sliding door 6 is in the closed state, the right side of the interior of the door frame 5 is blocked in the front-to-rear direction by the second door 20b and the second fixed wall 32. The dimension of the second fixed wall 32 in the opening / closing direction (X-axis direction) is greater than the dimension of the second door 20b in the opening / closing direction. Although not shown, when the sliding door 6 is in an open state, the left end of the second fixed wall 32 is located to the left of the left end of the second door 20b.

[0051] The passage 80 is a passage through which pedestrians can pass in the forward and backward directions through the sliding door device 1 when the sliding door 6 is in an open state. The passage 80 is a portion surrounded by the upper guide rail 7, the floor surface 84, the right end (+X side) of the first fixed wall 31, and the left end (-X side) of the second fixed wall 32. When the sliding door 6 is in a closed state, the passage 80 is blocked by the sliding door 6, thereby restricting pedestrians from passing through in the forward and backward directions.

[0052] Fig. 3 is a cross-sectional view showing a part of the sliding door device 1 when the sliding door 6 is in an open state, and is a cross-sectional view taken along III-III in Fig. 1. Although not shown, the configuration of the sliding door device 1 in the cross-section III'-III' in Fig. 1 when the sliding door 6 is in an open state is the same as the configuration of the sliding door device 1 shown in Fig. 3. Fig. 4 is a cross-sectional view showing a part of the sliding door device 1 when the sliding door 6 is in a closed state, and is a cross-sectional view taken along IV-IV in Fig. 1. Although not shown, the configuration of the sliding door device 1 in the cross-section IV'-IV' in Fig. 1 when the sliding door 6 is in a closed state is the same as the configuration of the sliding door device 1 shown in Fig. 4.

[0053] The lower guide rail 8 supports the lower portion of the sliding door 6 so that it can move in the opening and closing direction (X-axis direction). As shown in Figures 3 and 4, the lower end of the door section 20, a lower frame 25, and a vibration prevention member 26 are housed inside the lower guide rail 8. The lower guide rail 8 includes a guide rail main body 40 and a cover member 50.

[0054] The guide rail main body 40 is embedded and fixed inside the floor surface 84. As shown in FIG. 1, the guide rail main body 40 extends along the opening / closing direction (X-axis direction). The right end (+X side) of the guide rail main body 40 is fixed to the right side portion 5a. The left end (-X side) of the guide rail main body 40 is fixed to the left side portion 5b. As shown in FIGS. 3 and 4, the guide rail main body 40 is composed of a first rail member 43, a second rail member 44, and a third rail member 45. In this embodiment, the first rail member 43, the second rail member 44, and the third rail member 45 are separate members. The first rail member 43 and the third rail member 45 are fixed to each other. The second rail member 44 and the third rail member 45 are fixed to each other. The first rail member 43 and the second rail member 44 may be an integrated member. Furthermore, the first rail member 43, the second rail member 44, and the third rail member 45 may be an integral member.

[0055] The first rail member 43 is the front (+D1 side) portion of the upper portion of the guide rail main body 40. The first rail member 43 has a first side wall portion 43a, a first upper wall portion 43b, a first hanging portion 43c, and a first bottom wall portion 43d.

[0056] The first side wall portion 43a has a plate shape that protrudes in the vertical direction (Z-axis direction). The plate surface of the first side wall portion 43a faces the front-rear direction (Y-axis direction). The first side wall portion 43a is disposed on the front side (+D1 side) of the lower frame 25. In the vertical direction, the upper end of the first side wall portion 43a is positioned above the upper end of the lower frame 25. The lower end of the first side wall portion 43a is positioned below the lower end of the lower frame 25. As shown in FIG. 4, a first through hole 43a1 that penetrates in the front-rear direction is provided in a central portion of the first side wall portion 43a in the opening / closing direction (X-axis direction). When viewed in the front-rear direction, the first through hole 43a1 has a circular shape. Although not shown, a plurality of first through holes 43a1 are provided at intervals along the opening / closing direction.

[0057] As shown in Figures 3 and 4, the first upper wall portion 43b is a plate-like member that protrudes forward (toward the +D1 side) from the upper end of the first side wall portion 43a. The plate surface of the first upper wall portion 43b faces the vertical direction (Z-axis direction). As shown in Figure 3, the first upper wall portion 43b is provided with first female screw holes 43b1 that penetrate in the vertical direction (Z-axis direction). Although not shown, the first female screw holes 43b1 are provided in multiple locations at intervals along the opening / closing direction (X-axis direction) on both the left side (-X side) of the first upper wall portion 43b and the right side (+X side) of the first upper wall portion 43b.

[0058] As shown in FIGS. 3 and 4, first hanging portion 43c is plate-shaped and protrudes downward from the front (+D1 side) end of first upper wall portion 43b. The plate surface of first hanging portion 43c faces the front-rear direction (Y-axis direction). As shown in FIG. 4, a second through-hole 43c1 penetrating in the front-rear direction is provided in the center of first hanging portion 43c in the opening / closing direction (X-axis direction). As viewed in the front-rear direction, second through-hole 43c1 has a circular shape. Although not shown, a plurality of second through-holes 43c1 are provided at intervals along the opening / closing direction. As viewed in the front-rear direction, each second through-hole 43c1 overlaps with a first through-hole 43a1.

[0059] 3 and 4, the first bottom wall portion 43d is a plate-like member that protrudes rearward (toward the -D1 side) from the lower end of the first side wall portion 43a. The plate surface of the first bottom wall portion 43d faces vertically (in the Z-axis direction). The rear end of the first bottom wall portion 43d is spaced apart from the anti-vibration member 26 in the front-rear direction (in the Y-axis direction).

[0060] The second rail member 44 is a rear (-D1 side) portion of the upper portion of the guide rail main body 40. The second rail member 44 has a second side wall portion 44a, a second upper wall portion 44b, a second hanging portion 44c, and a second bottom wall portion 44d. The shape of the second rail member 44 is plane-symmetrical to the shape of the first rail member 43, with the door portion center plane S1, which is a plane passing through the center of the door portion 20 in the front-rear direction (Y-axis direction), as the plane of symmetry. Therefore, descriptions of parts of the shape of the second rail member 44 that overlap with the shape of the first rail member 43, other than those that are plane-symmetrical, may be omitted. In this embodiment, the door portion center plane S1 is perpendicular to the front-rear direction.

[0061] The second side wall portion 44a is disposed on the rear side (-D1 side) of the lower frame 25. As shown in Fig. 4, a third through hole 44a1 penetrating in the front-rear direction (Y-axis direction) is provided in the center of the second side wall portion 44a in the opening / closing direction (X-axis direction). Although not shown, a plurality of third through holes 44a1 are provided at intervals along the opening / closing direction.

[0062] 3 and 4, the second upper wall portion 44b is plate-shaped and protrudes rearward (toward the -D1 side) from the upper end of the second side wall portion 44a. As shown in Fig. 3, the second upper wall portion 44b is provided with second female screw holes 44b1 that penetrate in the vertical direction. Although not shown, the second female screw holes 44b1 are provided in multiple locations at intervals along the opening / closing direction (X-axis direction) on each of the left (-X side) and right (+X side) portions of the second upper wall portion 44b.

[0063] 3 and 4, second hanging portion 44c is plate-shaped and protrudes downward from the rear (-D1 side) end of second upper wall portion 44b. As shown in FIG. 4, a fourth through hole 44c1 penetrating in the front-rear direction (Y-axis direction) is provided in the center of second hanging portion 44c in the opening / closing direction (X-axis direction). Although not shown, a plurality of fourth through holes 44c1 are provided at intervals along the opening / closing direction (X-axis direction). When viewed in the front-rear direction, each fourth through hole 44c1 overlaps with a third through hole 44a1.

[0064] 3 and 4, the second bottom wall portion 44d is a plate-like member that protrudes forward (toward the +D1 side) from the lower end of the second side wall portion 44a. The front end of the second bottom wall portion 44d is disposed at a distance from the anti-vibration member 26 in the front-rear direction (the Y-axis direction).

[0065] The third rail member 45 is a lower portion of the guide rail main body 40. The third rail member 45 has a third upper wall portion 45a, a third side wall portion 45b, a fourth upper wall portion 45c, a fourth side wall portion 45d, and a third bottom wall portion 45e.

[0066] The third upper wall portion 45a is a plate-like portion that protrudes in the front-rear direction (Y-axis direction). The plate surface of the third upper wall portion 45a faces the vertical direction (Z-axis direction). The third upper wall portion 45a is disposed on the front side (+D1 side) of the anti-vibration member 26. The surface of the third upper wall portion 45a facing downward is fixed to the surface of the first bottom wall portion 43d facing upward. This fixes the first rail member 43 and the third rail member 45 together.

[0067] The third side wall portion 45b is a plate-like portion that protrudes downward from the rear end (-D1 side) of the third upper wall portion 45a. The plate surface of the third side wall portion 45b faces the front-rear direction (Y-axis direction). The lower end of the third side wall portion 45b is located lower than the lower end of the anti-vibration member 26. The surface of the third side wall portion 45b facing rearward faces the surface of the anti-vibration member 26 facing frontward (+D1 side) in the front-rear direction. The surface of the third side wall portion 45b facing rearward may come into contact with the surface of the anti-vibration member 26 facing frontward.

[0068] The fourth upper wall portion 45c has a plate shape that protrudes in the front-rear direction (Y-axis direction). The plate surface of the fourth upper wall portion 45c faces the vertical direction (Z-axis direction). The fourth upper wall portion 45c is disposed on the rear side (-D1 side) of the anti-vibration member 26. The surface of the fourth upper wall portion 45c facing downward is fixed to the surface of the second bottom wall portion 44d facing upward. This fixes the second rail member 44 and the third rail member 45 together.

[0069] The fourth side wall portion 45d is a plate-like portion that protrudes downward from the front end (+D1 side) of the fourth upper wall portion 45c. The plate surface of the fourth side wall portion 45d faces the front-rear direction (Y-axis direction). The lower end of the fourth side wall portion 45d is located lower than the lower end of the anti-vibration member 26. The surface of the fourth side wall portion 45d facing the front side faces the surface of the anti-vibration member 26 facing the rear side (-D1 side) in the front-rear direction. The surface of the fourth side wall portion 45d facing the front side may come into contact with the surface of the anti-vibration member 26 facing the rear side.

[0070] The third bottom wall portion 45e has a plate shape that protrudes in the front-to-rear direction (Y-axis direction). The plate surface of the third bottom wall portion 45e faces the vertical direction (Z-axis direction). The front end (+D1 side) of the third bottom wall portion 45e is connected to the lower end of the third side wall portion 45b. The rear end (-D1 side) of the third bottom wall portion 45e is connected to the lower end of the fourth side wall portion 45d.

[0071] As shown in FIGS. 3 and 4, the guide rail main body 40 has a first storage section 41 and a second storage section 42. The first storage section 41 is the upper portion of the guide rail main body 40. The first storage section 41 has a rectangular cylindrical shape extending in the opening / closing direction (X-axis direction). When viewed in the opening / closing direction, the first storage section 41 has a substantially rectangular shape. The first storage section 41 is composed of a first side wall section 43a, a first bottom wall section 43d, a third upper wall section 45a, a second side wall section 44a, a second bottom wall section 44d, and a fourth upper wall section 45c. The lower end of the door section 20, the lower frame 25, and the upper portion of the anti-vibration member 26 are housed inside the first storage section 41. The first storage section 41 has an opening 40a that opens vertically upward. The door section 20 is passed through the opening 40a in the vertical direction (Z-axis direction). The inner surfaces of the first accommodating portion 41 on both sides in the front-rear direction (Y-axis direction), i.e., in the first direction D1, are disposed with a gap between them and the lower frame 25. Therefore, according to this embodiment, when the sliding door 6 moves in the opening / closing direction, contact between the lower frame 25 and the first accommodating portion 41 can be suppressed. Therefore, the sliding door 6 can be moved smoothly in the opening / closing direction.

[0072] The second housing portion 42 is a lower portion of the guide rail main body 40. The second housing portion 42 is disposed vertically below the first housing portion 41. The second housing portion 42 has a rectangular cylindrical shape extending in the opening / closing direction (X-axis direction). When viewed in the opening / closing direction, the second housing portion 42 has a generally rectangular shape that opens upward. The interior of the second housing portion 42 is connected to the interior of the first housing portion 41. The second housing portion 42 is formed by a third side wall portion 45b, a fourth side wall portion 45d, and a third bottom wall portion 45e. In the front-rear direction (Y-axis direction), i.e., the first direction D1, the interior dimension L3 of the first housing portion 41 is greater than the interior dimension L4 of the second housing portion 42. The interior of the second housing portion 42 accommodates a lower portion of the anti-vibration member 26. That is, the second housing portion 42 accommodates at least a portion of the anti-vibration member 26 therein. Therefore, according to this embodiment, a portion of the anti-sway member 26 is accommodated inside the second accommodating portion 42, which has a small dimension in the front-to-rear direction, so that the sliding door 6 can be prevented from swinging in the front-to-rear direction when the sliding door 6 moves in the opening / closing direction. Therefore, the sliding door 6 can be moved smoothly in the opening / closing direction.

[0073] In the front-rear direction (Y-axis direction), the internal dimension L4 of the second accommodating portion 42 is larger than the dimension L5 of the anti-vibration member 26. Also, in FIGS. 3 and 4 , the surface of the anti-vibration member 26 facing the front-rear direction (Y-axis direction) and the surface of the inner surface of the second accommodating portion 42 facing the front-rear direction are separated in the front-rear direction. However, when the door section 20 moves in the opening / closing direction (X-axis direction), one of the pair of surfaces of the inner surface of the second accommodating portion 42 facing the front-rear direction comes into contact with the anti-vibration member 26. This allows the second accommodating portion 42 to support the anti-vibration member 26 so that it can slide in the opening / closing direction (X-axis direction). Therefore, according to this embodiment, when the sliding door 6 moves in the opening / closing direction, the inner surface of the second accommodating portion 42 can guide the sliding door 6 in the opening / closing direction. Therefore, when the sliding door 6 moves in the opening / closing direction, the sliding door 6 can be more effectively prevented from swinging in the front-rear direction, allowing the sliding door 6 to move more smoothly in the opening / closing direction.

[0074] Furthermore, as described above, according to this embodiment, the anti-sway member 26 is made of resin. This reduces the frictional force between the anti-sway member 26 and the inner surface of the second accommodating portion 42, allowing the sliding door 6 to move more smoothly in the opening / closing direction (X-axis direction).

[0075] As shown in FIGS. 3 and 4, the cover member 50 is attached to the guide rail main body 40. The cover member 50 covers a portion of the opening 40a of the guide rail main body 40. As shown in FIG. 1, the cover member 50 extends in the opening / closing direction (X-axis direction). In the opening / closing direction, the left end (-X side) of the cover member 50 is positioned approximately at the same position as the left end of the guide rail main body 40. In the opening / closing direction, the right end (+X side) of the cover member 50 is positioned approximately at the same position as the right end of the guide rail main body 40. The cover member 50 includes a first cover member 51 and a second cover member 55. Note that the second cover member 55 does not necessarily have to be provided. In this case, a configuration can be adopted in which only the first cover member 51 covers the entire opening / closing direction of the opening 40a of the guide rail main body 40. Note that in this case, only one first cover member 51 may be provided, or two or more first cover members 51 may be provided side by side along the opening / closing direction.

[0076] The first cover members 51 close both sides of the opening 40a of the guide rail main body 40 in the opening / closing direction (X-axis direction). As shown in FIG. 1 , the first cover members 51 extend along the opening / closing direction. In this embodiment, two first cover members 51 are provided, sandwiching the second cover member 55 in the opening / closing direction. One first cover member 51 is disposed on the left side (-X side) of the second cover member 55 in the opening / closing direction. The other first cover member 51 is disposed on the right side (+X side) of the second cover member 55 in the opening / closing direction. Therefore, the first cover members 51 and the second cover members 55 are disposed side by side in the opening / closing direction. In this embodiment, the two first cover members 51 are similar in configuration, such as their shapes and the configurations for attachment to the guide rail main body 40, except for their positions in the opening / closing direction. Therefore, in the following description, common configurations of the two first cover members 51 will be described only for one first cover member 51, and a description of the other first cover member 51 will be omitted.

[0077] In the opening / closing direction (X-axis direction), the left-side (-X side) end of one first cover member 51 is at approximately the same position as the left-side end of the guide rail main body 40. The right-side (+X side) end of one first cover member 51 is located between the right-side end of the first fixed wall 31 and the left-side end of the first door 20a when the sliding door 6 is in the closed state. When viewed in the front-rear direction (Y-axis direction), one first cover member 51 overlaps with the first fixed wall 31. A dimension L2 in the opening / closing direction of one first cover member 51 is greater than a dimension L1 in the opening / closing direction of the first door 20a.

[0078] In the opening / closing direction (X-axis direction), the right-side (+X-side) end of the other first cover member 51 is located at approximately the same position as the right-side end of the guide rail main body 40. The left-side (-X-side) end of the other first cover member 51 is located between the left-side end of the second fixed wall 32 and the right-side end of the second door 20b when the sliding door 6 is in the closed state. When viewed in the front-rear direction (Y-axis direction), the other first cover member 51 overlaps with the second fixed wall 32. Therefore, when viewed in the front-rear direction, i.e., the first direction D1, the first cover member 51 overlaps with the fixed wall 30. The dimension L2 of the other first cover member 51 in the opening / closing direction is greater than the dimension L1 of the second door 20b in the opening / closing direction.

[0079] As shown in FIG. 3, the first cover member 51 is attached to the upper end of the guide rail main body 40. In the vertical direction (Z-axis direction), the upper end of the first cover member 51 is at approximately the same position as the floor surface 84. The first cover member 51 has a first cover portion 52 and a second cover portion 53. In this embodiment, the first cover portion 52 and the second cover portion 53 are separate from each other. The first cover portion 52 and the second cover portion 53 are arranged opposite each other with a gap in the front-rear direction (Y-axis direction). That is, the first cover member 51 has a pair of cover portions 52, 53 arranged opposite each other with a gap in the front-rear direction, i.e., in the first direction D1.

[0080] 3, the first lid portion 52 closes a portion of the front side (+D1 side) of the opening 40a. The first lid portion 52 is disposed forward of the door portion 20. The first lid portion 52 is attached to the first rail member 43 with screws 92. That is, the first lid portion 52 is attached to the guide rail main body 40. The first lid portion 52 has a first top wall portion 52a, a first folded portion 52b, and a first inner wall portion 52c.

[0081] The first top wall portion 52a is plate-shaped and protrudes in the front-rear direction (Y-axis direction). The plate surface of the first top wall portion 52a faces the vertical direction (Z-axis direction). The downward surface of the first top wall portion 52a contacts the upward surface of the first upper wall portion 43b. The front end (+D1 side) of the first top wall portion 52a is positioned at approximately the same position as the front end of the first upper wall portion 43b. The rear end (-D1 side) of the first top wall portion 52a is positioned rearward of the first side wall portion 43a and faces the door portion 20 with a gap therebetween in the front-rear direction. As a result, the first lid portion 52 blocks a portion of the front portion of the opening 40a. A fifth through-hole 52a1 penetrating the front portion of the first top wall portion 52a in the vertical direction (Z-axis direction) is provided. The inner circumferential surface of the fifth through hole 52a1 is tapered such that the inner diameter of the fifth through hole 52a1 decreases toward the bottom. Although not shown, a plurality of fifth through holes 52a1 are provided at intervals along the opening / closing direction (X-axis direction). When viewed in the vertical direction, each fifth through hole 52a1 overlaps with a corresponding first female screw hole 43b1.

[0082] The first folded portion 52b is a plate-like member that bends from the rear end (-D1 side) of the first top wall portion 52a toward the front end (+D1 side) and protrudes forward. The plate surface of the first folded portion 52b faces the vertical direction (Z-axis direction). The front end of the first folded portion 52b faces the first side wall portion 43a. The front end of the first folded portion 52b may be in contact with the first side wall portion 43a.

[0083] The first inner wall portion 52c is a plate-like portion that protrudes downward from the front end (+D1 side) of the first folded portion 52b. The plate surface of the first inner wall portion 52c faces the front-rear direction (Y-axis direction). The first inner wall portion 52c faces the first side wall portion 43a in the front-rear direction. The first inner wall portion 52c may be in contact with the first side wall portion 43a.

[0084] As shown in FIG. 3 , the screw 92 is passed vertically through the fifth through-hole 52a1 from above and tightened into the first female screw hole 43b1. The downward surface of the head 92a of the screw 92 contacts the inner circumferential surface of the fifth through-hole 52a1. This allows the first cover portion 52 to be attached to the first rail member 43. The head 92a is exposed to the outside of the sliding door device 1 from the upward surface of the first cover portion 52. This allows the screw 92 to be easily attached to and detached from the guide rail main body 40.

[0085] The second lid portion 53 closes a portion of the rear side (-D1 side) of the opening 40a. The second lid portion 53 is disposed rearward of the door portion 20. The second lid portion 53 is attached to the second rail member 44 with screws 93. That is, the second lid portion 53 is attached to the guide rail main body 40. The second lid portion 53 has a second top wall portion 53a, a second folded portion 53b, and a second inner wall portion 53c. The shape of the second lid portion 53 is plane-symmetrical to the shape of the first lid portion 52, with the door portion center plane S1 as the plane of symmetry. Of the shape, etc. of the second lid portion 53, descriptions of parts that overlap with the shape, etc. of the first lid portion 52, other than the plane-symmetrical parts, may be omitted.

[0086] The second top wall portion 53a is plate-shaped and protrudes in the front-rear direction (Y-axis direction). The front (+D1 side) end of the second top wall portion 53a is located forward of the second side wall portion 44a and faces the door portion 20 with a gap in the front-rear direction. This allows the second lid portion 53 to block a part of the rear (-D1 side) portion of the opening 40a. A sixth through hole 53a1 penetrating in the vertical direction (Z-axis direction) is provided in the rear portion of the second top wall portion 53a. Although not shown, a plurality of sixth through holes 53a1 are provided at intervals along the opening / closing direction (X-axis direction). When viewed in the vertical direction, each sixth through hole 53a1 overlaps with a second female screw hole 44b1.

[0087] The second folded portion 53b is a plate-like member that bends from the front end (+D1 side) of the second top wall portion 53a toward the rear end (-D1 side) and protrudes rearward. The rear end of the second folded portion 53b faces the second side wall portion 44a.

[0088] The second inner wall portion 53c is a plate-like portion that protrudes downward from the rear end (-D1 side) of the second folded portion 53b. The second inner wall portion 53c faces the second side wall portion 44a.

[0089] As shown in FIG. 3 , the screw 93 is passed vertically through the sixth through-hole 53a1 from above and screwed into the second female screw hole 44b1. The downward surface of the head 93a of the screw 93 contacts the inner circumferential surface of the sixth through-hole 53a1. This attaches the second cover portion 53 to the second rail member 44. The head 93a is exposed to the outside of the sliding door device 1 from the upward surface of the second cover portion 53. This allows the screw 93 to be easily attached to and detached from the guide rail main body 40. Therefore, the second cover portion 53 can be easily attached to and detached from the guide rail main body 40. As described above, the head 92a of the screw 92 is exposed to the outside of the sliding door device 1. Furthermore, as described above, the dimension L2 of the first cover member 51 in the opening / closing direction (X-axis direction) is greater than the dimension L1 of the first door 20a and the second door 20b in the opening / closing direction. Therefore, according to this embodiment, the first cover member 51 can be removed from the guide rail main body 40, and the lower end of the sliding door 6 can be pulled out from inside the guide rail main body 40 to outside the guide rail main body 40 through the portion of the opening 40a that was previously blocked by the first cover member 51. This allows the sliding door 6 to be removed from the lower sliding door device 1. Furthermore, the lower end of the sliding door 6 can be inserted from outside the guide rail main body 40 into the inside of the guide rail main body 40 through the portion of the opening 40a that was previously blocked by the first cover member 51. This allows the sliding door 6 to be attached to the sliding door device 1. This makes it possible to perform installation and maintenance of the sliding door 6.

[0090] Furthermore, according to this embodiment, the heads 92a, 93a are exposed to the outside of the sliding door device 1, so the screws 92, 93 can be easily removed from the outside of the sliding door device 1. This allows the first cover member 51 to be easily removed from the guide rail main body 40. Furthermore, when reattaching the first cover member 51 to the guide rail main body 40, the screws 92, 93 can be easily fastened from the outside of the sliding door device 1, so the first cover member 51 can be easily attached to the guide rail main body 40. This simplifies the installation and maintenance work of the sliding door 6. Furthermore, if a foreign object gets inside the guide rail main body 40, the foreign object can be easily removed by removing the first cover member 51.

[0091] Furthermore, according to this embodiment, the sliding door 6 can be attached to and detached from the sliding door device 1 by removing the first cover member 51 from the guide rail main body 40, so there is no need to remove the second cover member 55 when performing installation and maintenance work on the sliding door 6. Therefore, the installation and maintenance work on the sliding door 6 can be further simplified.

[0092] The second cover member 55 closes the center of the opening 40a of the guide rail main body 40 in the opening / closing direction (X-axis direction). As shown in FIG. 1, the second cover member 55 extends along the opening / closing direction. In the opening / closing direction, the left (-X side) end of the second cover member 55 is located between the right (+X side) end of the first fixed wall 31 and the left side end of the first door 20a when the sliding door 6 is in the closed state. In the opening / closing direction (X-axis direction), the right (+X side) end of the second cover member 55 is located between the left side end of the second fixed wall 32 and the right side end of the second door 20b when the sliding door 6 is in the closed state. The second cover member 55 closes the portion of the opening 40a of the guide rail main body 40 that overlaps with the passage 80. As shown in FIG. 4, the second cover member 55 is fixed to the upper end of the guide rail main body 40. In the vertical direction, the upper end of second lid member 55 is at approximately the same position as floor surface 84. Second lid member 55 has third lid portion 56 and fourth lid portion 57. Third lid portion 56 and fourth lid portion 57 are arranged opposite each other with a gap in the front-to-rear direction (Y-axis direction). That is, second lid member 55 has a pair of lid portions 56, 57 arranged opposite each other with a gap in the front-to-rear direction, i.e., in first direction D1.

[0093] 4, the third lid portion 56 closes the front side (+D1 side) of the opening 40a. The third lid portion 56 is disposed forward of the door portion 20. The third lid portion 56 has a third top wall portion 56a, a third folded portion 56b, a third inner wall portion 56c, and a third outer wall portion 56d.

[0094] The third top wall portion 56a is plate-shaped and protrudes in the front-rear direction (Y-axis direction). The plate surface of the third top wall portion 56a faces the vertical direction (Z-axis direction). The downward surface of the third top wall portion 56a contacts the upward surface of the first upper wall portion 43b. The rear end (-D1 side) of the third top wall portion 56a is located rearward of the first side wall portion 43a and faces the door portion 20 with a gap in the front-rear direction. As a result, the third lid portion 56 closes the front portion of the opening 40a.

[0095] The third folded portion 56b is a plate-like portion that bends from the rear end (-D1 side) of the third top wall portion 56a toward the front end (+D1 side) and protrudes forward. The plate surface of the third folded portion 56b faces the vertical direction (Z-axis direction). The front end of the third folded portion 56b faces the first side wall portion 43a. The front end of the third folded portion 56b may contact the first side wall portion 43a.

[0096] The third inner wall portion 56c is a plate-like portion that protrudes downward from the front (+D1 side) end of the third folded portion 56b. The plate surface of the third inner wall portion 56c faces the front-rear direction (Y-axis direction). The front-facing surface of the third inner wall portion 56c faces the rear (-D1 side) surface of the first side wall portion 43a. The third inner wall portion 56c may be in contact with the first side wall portion 43a. The third inner wall portion 56c is provided with a seventh through hole 56c1 that penetrates in the front-rear direction. Although not shown, a plurality of seventh through holes 56c1 are provided at intervals along the opening / closing direction (X-axis direction). Each of the seventh through holes 56c1 overlaps with a first through hole 43a1.

[0097] The third outer wall portion 56d is a plate-like portion that protrudes downward from the front (+D1 side) end of the third top wall portion 56a. The plate surface of the third outer wall portion 56d faces the front-rear direction (Y-axis direction). The rear (-D1 side) surface of the third outer wall portion 56d faces the front surface of the first side wall portion 43a. The third outer wall portion 56d may be in contact with the first side wall portion 43a. An eighth through hole 56d1 that penetrates in the front-rear direction is provided in the third outer wall portion 56d. Although not shown, a plurality of eighth through holes 56d1 are provided at intervals along the opening / closing direction (X-axis direction). Each of the eighth through holes 56d1 overlaps with a first through hole 43a1.

[0098] As shown in FIG. 4 , the fastening member 95 is passed through the first through hole 43a1, the second through hole 43c1, the seventh through hole 56c1, and the eighth through hole 56d1 in the front-rear direction (Y-axis direction). The fastening member 95 is fitted into the first through hole 43a1, the second through hole 43c1, the seventh through hole 56c1, and the eighth through hole 56d1. In this embodiment, the fastening member 95 is a rivet. This fastens the third cover portion 56 to the first rail member 43. The fastening member 95 is disposed inside the floor surface 84. The third cover portion 56 and the first rail member 43 may be fastened by other fastening members such as screws, or by welding. The third cover portion 56 and the first rail member 43 may be fastened by a combination of fastening members such as rivets and screws and welding. In this case, the third cover portion 56 can be more firmly fixed to the first rail member 43.

[0099] As shown in FIG. 4, the fourth cover portion 57 closes the rear (-D1 side) of the opening 40a. The fourth cover portion 57 is disposed rearward of the door portion 20. The fourth cover portion 57 has a fourth top wall portion 57a, a fourth folded portion 57b, a fourth inner wall portion 57c, and a fourth outer wall portion 57d. The shape of the fourth cover portion 57 is plane-symmetrical to the shape of the third cover portion 56, with the door portion center plane S1 as the plane of symmetry. Therefore, descriptions of parts of the shape of the fourth cover portion 57 that overlap with the shape of the third cover portion 56, etc., other than the plane symmetry, may be omitted.

[0100] The fourth top wall portion 57a ​​is a plate-like member that protrudes in the front-rear direction (Y-axis direction). The front end (+D1 side) of the fourth top wall portion 57a ​​is located forward of the second side wall portion 44a and faces the door portion 20 with a gap therebetween in the front-rear direction. This allows the fourth lid portion 57 to close the rear side (-D1 side) of the opening 40a.

[0101] The fourth folded portion 57b is a plate-like member that bends from the front end (+D1 side) of the fourth top wall portion 57a ​​toward the rear end (-D1 side) and protrudes rearward. The rear end of the fourth folded portion 57b faces the second side wall portion 44a.

[0102] The fourth inner wall portion 57c is a plate-like member that protrudes downward from the rear end (-D1 side) of the fourth folded portion 57b. The fourth inner wall portion 57c is provided with a plurality of ninth through holes 57c1 that penetrate in the front-rear direction (Y-axis direction). Each of the ninth through holes 57c1 overlaps with a corresponding one of the third through holes 44a1.

[0103] The fourth outer wall portion 57d is a plate-like member that protrudes downward from the rear (-D1 side) end of the fourth top wall portion 57a. The fourth outer wall portion 57d is provided with a plurality of tenth through holes 57d1 that penetrate in the front-rear direction. Each of the tenth through holes 57d1 overlaps with a corresponding one of the third through holes 44a1.

[0104] The fastening member 95 is fitted into the third through hole 44a1, the fourth through hole 44c1, the ninth through hole 57c1, and the tenth through hole 57d1. This fixes the fourth cover portion 57 to the second rail member 44. Therefore, according to this embodiment, the second cover member 55 is fixed to the guide rail main body 40. Furthermore, because the fastening member 95 is disposed inside the floor surface 84, the second cover member 55 cannot be removed from the guide rail main body 40 as long as the lower guide rail 8 is disposed inside the floor surface 84. Therefore, the second cover member 55 and the guide rail main body 40 can be fixed together more firmly, and even if a passerby steps on the second cover member 55 while passing through the passageway 80, the passerby can pass through the passageway 80 safely.

[0105] According to this embodiment, the lower guide rail 8 includes a guide rail main body 40 extending in the opening / closing direction (X-axis direction) and a cover member 50 attached to the guide rail main body 40. The guide rail main body 40 has an opening 40a opening upward. The guide rail main body 40 includes a first housing portion 41 that houses the lower frame 25 therein, and a second housing portion 42 that is disposed below the first housing portion 41 and houses at least a portion of the anti-vibration member 26 therein. In the front-rear direction (Y-axis direction) perpendicular to both the vertical direction (Z-axis direction) and the opening / closing direction, i.e., in the first direction D1, the internal dimension L3 of the first housing portion 41 is greater than the internal dimension L4 of the second housing portion 42. The cover member 50 extends in the opening / closing direction and blocks a portion of the opening 40a. Therefore, the lower frame 25 can be housed inside the guide rail main body 40, and the opening 40a can be blocked by the cover member 50, thereby preventing the lower frame 25 from being exposed to the outside. Therefore, the lower frame 25 can be prevented from being seen from the outside, and the aesthetic appearance of the sliding door 6 and the sliding door device 1 can be prevented from being impaired.

[0106] According to this embodiment, the first cover member 51 has a pair of cover portions, namely, the first cover portion 52 and the second cover portion 53, that are arranged opposite to each other with a gap in the front-rear direction (Y-axis direction), i.e., in the first direction D1, and therefore the first cover member 51 can close both front-rear sides of the opening 40a of the guide rail main body 40 on both sides in the opening / closing direction (X-axis direction). This can more effectively prevent the lower frame 25 from being exposed to the outside, and more effectively prevent the aesthetic appearance of the sliding door 6 and the sliding door device 1 from being impaired.

[0107] According to this embodiment, the second cover member 55 has a pair of cover portions, namely, the third cover portion 56 and the fourth cover portion 57, that are arranged opposite to each other with a gap in the front-rear direction (Y-axis direction), i.e., in the first direction D1, and therefore the second cover member 55 can close both front-rear directions of the opening 40a of the guide rail main body 40 at the center in the opening / closing direction (X-axis direction). This can more effectively prevent the lower frame 25 from being exposed to the outside, and more effectively prevent the aesthetic appearance of the sliding door 6 and the sliding door device 1 from being impaired.

[0108] <Variation 1> FIG. 5 is a cross-sectional view showing the lower guide rail 108 of the sliding door device 101 of Modified Example 1 of this embodiment. Note that FIG. 5 is a cross-sectional view when the sliding door 6 is in an open state, and is a cross-sectional view showing the III-III cross section shown in FIG. 1. The configuration of Modified Example 1 that can be adopted in the above-mentioned embodiment will be described below. Note that the same components as those in the above-mentioned embodiment are given the same reference numerals, and their description will be omitted. As shown in FIG. 5, in the lower guide rail 108 of this modified example, the first cover portion 152 and the guide rail main body portion 140 are attached with screws 92 arranged along the front-rear direction (Y-axis direction). The second cover portion 153 and the guide rail main body portion 140 are attached with screws 93 arranged along the front-rear direction.

[0109] 5, in this modification, a first female screw hole 143b1 and a third female screw hole 143b2 that penetrate in the vertical direction (Z-axis direction) are provided in the first upper wall portion 143b of the first rail member 143. The third female screw hole 143b2 is provided on the front side (+D1 side) of the first female screw hole 143b1. Although not shown, the first female screw hole 143b1 and the third female screw hole 143b2 are provided in plural numbers at intervals along the opening / closing direction (X-axis direction) on each of the left side (-X side) and right side (+X side) of the first upper wall portion 143b.

[0110] A second female screw hole 144b1 and a fourth female screw hole 144b2 that penetrate in the vertical direction (Z-axis direction) are provided in the second upper wall portion 144b of the second rail member 144. The fourth female screw hole 144b2 is provided on the rear side (-D1 side) of the second female screw hole 144b1. Although not shown, the second female screw hole 144b1 and the fourth female screw hole 144b2 are provided in plural numbers at intervals along the opening / closing direction (X-axis direction) on each of the left side (-X side) and right side (+X side) of the second upper wall portion 144b.

[0111] The first cover member 151 of the cover member 150 of this modification has a first cover portion 152 and a second cover portion 153. As shown in FIG. 5, a fifth through hole 152a1 and an eleventh through hole 152a2 are provided in the first top wall portion 152a of the first cover portion 152, penetrating in the vertical direction (vertical direction). The eleventh through hole 152a2 is provided on the front side (+X side) of the fifth through hole 152a1. Although not shown, the fifth through hole 152a1 and the eleventh through hole 152a2 are provided in plurality at intervals along the opening / closing direction (X-axis direction). When viewed in the vertical direction, each of the fifth through holes 52a1 overlaps with the first female screw hole 143b1. When viewed in the vertical direction, each of the eleventh through holes 152a2 overlaps with the third female screw hole 143b2.

[0112] The screw 92 is passed vertically from above through the fifth through hole 152a1 and screwed into the first female screw hole 143b1. The screw 92 is also passed vertically from above through the eleventh through hole 152a2 and screwed into the third female screw hole 143b2. In this way, the first lid portion 152 is attached to the first rail member 143. Compared to the above-described embodiment, in this modification, the first lid portion 152 is attached to the first rail member 143 by the screws 92 arranged side by side in the front-to-rear direction (Y-axis direction), so that the first lid portion 152 can be attached to the first rail member 143 more firmly.

[0113] The second top wall portion 153a of the second lid portion 153 is provided with a sixth through hole 153a1 and a twelfth through hole 153a2 that penetrate in the vertical direction (Z-axis direction). The twelfth through hole 153a2 is provided on the rear side (-X side) of the sixth through hole 153a1. Although not shown, the sixth through holes 153a1 and the twelfth through holes 153a2 are provided in plurality at intervals along the opening / closing direction (X-axis direction). When viewed in the vertical direction, each sixth through hole 153a1 overlaps with the second female screw hole 144b1. When viewed in the vertical direction, each twelfth through hole 153a2 overlaps with the fourth female screw hole 144b2.

[0114] The screw 93 is passed vertically through the sixth through hole 153a1 from above and is screwed into the second female screw hole 144b1. The screw 93 is also passed vertically through the twelfth through hole 153a2 from above and is screwed into the fourth female screw hole 144b2. This allows the second lid portion 153 to be firmly attached to the second rail member 144.

[0115] <Variation 2> FIG. 6 is a cross-sectional view showing a lower guide rail 208 of a sliding door device 201 according to a second modification of this embodiment. Note that FIG. 6 is a cross-sectional view showing the sliding door 6 in a closed state, taken along the line IV-IV in FIG. 1. The configuration of the second modification that can be employed in the above-described embodiment will be described below. Note that the same components as those in the above-described embodiment are denoted by the same reference numerals, and their description will be omitted. As shown in FIG. 6, in the lower guide rail 208 of this modification, a third cover portion 256 of a second cover member 255 is fixed to the guide rail main body 40 together with a first mounting member 258. A fourth cover portion 257 is fixed to the guide rail main body 40 together with a second mounting member 259.

[0116] As shown in Fig. 6, the third cover portion 256 of this modified example has a substantially L-shaped plate shape when viewed in the opening / closing direction (X-axis direction). The third cover portion 256 has a third top wall portion 56a and a third outer wall portion 56d. The first mounting member 258 has a substantially L-shaped plate shape when viewed in the opening / closing direction (X-axis direction). The first mounting member 258 extends along the opening / closing direction. The first mounting member 258 has a fifth top wall portion 258a and a fifth inner wall portion 258b.

[0117] The fifth top wall portion 258a is plate-shaped and protrudes in the front-to-rear direction (Y-axis direction). The plate surface of the fifth top wall portion 258a faces the vertical direction (Z-axis direction). In the vertical direction, the fifth top wall portion 258a is disposed between the third top wall portion 56a and the first upper wall portion 43b. The downward surface of the fifth top wall portion 258a contacts the upward surface of the first upper wall portion 43b. The upward surface of the fifth top wall portion 258a contacts the downward surface of the third top wall portion 56a. The rear end (-D1 side) of the fifth top wall portion 258a is located rearward of the first side wall portion 43a.

[0118] The fifth inner wall portion 258b is a plate-like portion that protrudes downward from the rear end (-D1 side) of the fifth top wall portion 258a. The plate surface of the fifth inner wall portion 258b faces the front-rear direction (Y-axis direction). The fifth inner wall portion 258b is provided with thirteenth through holes 258b1 that penetrate in the front-rear direction. Although not shown, a plurality of the thirteenth through holes 258b1 are provided at intervals along the opening / closing direction (X-axis direction). Each of the thirteenth through holes 258b1 overlaps with a first through hole 43a1.

[0119] The fastening member 95 is fitted into the first through hole 43a1, the second through hole 43c1, the thirteenth through hole 258b1, and the eighth through hole 56d1, thereby fixing the third lid portion 256 together with the first mounting member 258 to the first rail member 43.

[0120] As shown in Fig. 6, the fourth cover portion 257 of this modified example has a substantially L-shaped plate shape when viewed in the opening / closing direction (X-axis direction). The fourth cover portion 257 has a fourth top wall portion 57a ​​and a fourth outer wall portion 57d. The second mounting member 259 has a substantially L-shaped plate shape when viewed in the opening / closing direction (X-axis direction). The second mounting member 259 extends along the opening / closing direction. The second mounting member 259 has a sixth top wall portion 259a and a sixth inner wall portion 259b.

[0121] The sixth ceiling wall 259a is a plate-like member that protrudes in the front-rear direction (Y-axis direction). In the vertical direction, the sixth ceiling wall 259a is disposed between the fourth ceiling wall 57a and the second upper wall 44b. The front end (+D1 side) of the sixth ceiling wall 259a is located further forward than the second side wall 44a.

[0122] The sixth inner wall portion 259b is plate-shaped and protrudes downward from the front end (+D1 side) of the sixth ceiling wall portion 259a. The sixth inner wall portion 259b is provided with fourteenth through holes 259b1 that penetrate in the front-rear direction (Y-axis direction). Although not shown, a plurality of fourteenth through holes 259b1 are provided at intervals along the opening / closing direction (X-axis direction). Each of the fourteenth through holes 259b1 overlaps with a third through hole 44a1.

[0123] The fastening member 95 is fitted into the third through hole 44a1, the fourth through hole 44c1, the fourteenth through hole 259b1, and the tenth through hole 57d1, thereby fixing the fourth lid portion 257 together with the second mounting member 259 to the second rail member 44.

[0124] As described above, in this modification, third lid part 256, fourth lid part 257, first attachment member 258, and second attachment member 259 each have a simple L-shape, which makes it possible to prevent an increase in the number of steps required to manufacture third lid part 256, fourth lid part 257, first attachment member 258, and second attachment member 259. Therefore, it is possible to prevent an increase in the number of steps required to manufacture second lid member 255 and lid member 250.

[0125] <Variation 3> FIG. 7 is a cross-sectional view showing a lower guide rail 308 of a sliding door device 301 according to a third modification of this embodiment. Note that FIG. 7 is a cross-sectional view showing the sliding door 6 in an open state, taken along the line III-III in FIG. 1. The configuration of the third modification that can be employed in the above-described embodiment will be described below. Note that components identical to those in the above-described embodiment are designated by the same reference numerals, and their description will be omitted. As shown in FIG. 7, in the lower guide rail 308 according to this modification, the configuration of the guide rail main body 340 differs from the configuration of the guide rail main body 40 in the above-described embodiment.

[0126] 7, guide rail main body 340 of this modified example is composed of first rail member 343, second rail member 344, and third rail member 345. First rail member 343 has first side wall portion 43a, first upper wall portion 43b, and first hanging portion 43c. Second rail member 344 has second side wall portion 44a, second upper wall portion 44b, and second hanging portion 44c.

[0127] The third rail member 345 has a third upper wall portion 345a, a third side wall portion 45b, a fourth upper wall portion 345c, a fourth side wall portion 45d, a third bottom wall portion 45e, a fifth side wall portion 345f, and a sixth side wall portion 345g.

[0128] The third upper wall portion 345a and the fourth upper wall portion 345c are each shaped like a plate that protrudes in the front-rear direction (Y-axis direction). The plate surfaces of the third upper wall portion 345a and the fourth upper wall portion 345c face the vertical direction (Z-axis direction). The front end (+X side) of the third upper wall portion 345a is located forward of the first side wall portion 43a. The rear end (-X side) of the fourth upper wall portion 345c is located rearward of the second side wall portion 44a.

[0129] The fifth side wall portion 345f is a plate-like member that protrudes upward from the front (+D1 side) end of the third upper wall portion 345a. The plate surface of the fifth side wall portion 345f faces the front-rear direction (Y-axis direction). The surface of the fifth side wall portion 345f facing the rear (-D1 side) is fixed to the surface of the first side wall portion 43a facing the front. This fixes the first rail member 343 and the third rail member 345 together.

[0130] The sixth side wall portion 345g is a plate-like member that protrudes upward from the rear end (-D1 side) of the fourth upper wall portion 345c. The plate surface of the sixth side wall portion 345g faces the front-rear direction (Y-axis direction). The surface of the sixth side wall portion 345g facing the front (+D1 side) is fixed to the surface of the second side wall portion 44a facing the rear. This fixes the second rail member 344 and the third rail member 345 together.

[0131] 7, in this modification, the first storage section 41 is formed by a first side wall 43a, a third upper wall 345a, a second side wall 44a, and a fourth upper wall 345c, while the second storage section 42 is formed by a third side wall 45b, a fourth side wall 45d, and a third bottom wall 45e.

[0132] <Variation 4> FIG. 8 is a cross-sectional view showing a lower guide rail 408 of a sliding door device 401 according to a fourth modification of this embodiment. Note that FIG. 8 is a cross-sectional view showing the sliding door 6 in an open state, and is a cross-sectional view showing the III-III cross section shown in FIG. 1. The configuration of the fourth modification that can be adopted in the above-described embodiment will be described below. Note that components that are the same as those in the above-described embodiment are given the same reference numerals, and their description will be omitted. As shown in FIG. 8, in the lower guide rail 408 of this modification, a guide rail main body 440 is formed from a single member. The guide rail main body 440 has a first side wall portion 443a, a first upper wall portion 443b, a first hanging portion 443c, a first bottom wall portion 443d, a second side wall portion 443e, a second upper wall portion 443f, a second hanging portion 443g, a second bottom wall portion 443h, a third side wall portion 443i, a fourth side wall portion 443j, and a third bottom wall portion 443k.

[0133] The shapes and arrangements of first side wall portion 443a, first upper wall portion 443b, first hanging portion 443c, and first bottom wall portion 443d are similar to those of first side wall portion 43a, first upper wall portion 43b, first hanging portion 43c, and first bottom wall portion 43d of the present embodiment, respectively. The shapes and arrangements of second side wall portion 443e, second upper wall portion 443f, second hanging portion 443g, and second bottom wall portion 443h are similar to those of second side wall portion 44a, second upper wall portion 44b, second hanging portion 44c, and second bottom wall portion 44d of the present embodiment, respectively.

[0134] The third side wall portion 443i is a plate-like portion that protrudes downward from the rear (-D1 side) end of the first bottom wall portion 443d. The plate surface of the third side wall portion 443i faces the front-rear direction (Y-axis direction). The fourth side wall portion 443j is a plate-like portion that protrudes downward from the front (+D1 side) end of the second bottom wall portion 443h. The plate surface of the fourth side wall portion 443j faces the front-rear direction. The third bottom wall portion 443k is a plate-like portion that protrudes in the front-rear direction. The plate surface of the third bottom wall portion 443k faces the vertical direction (Z-axis direction). The front end of the third bottom wall portion 443k is connected to the lower end of the third side wall portion 443i. The rear end of the third bottom wall portion 443k is connected to the lower end of the fourth side wall portion 443j.

[0135] As shown in FIG. 8 , in this modification, the first storage section 41 is formed by a first side wall 443a, a first bottom wall 443d, a second side wall 443e, and a second bottom wall 443h. The second storage section 42 is formed by a third side wall 443i, a fourth side wall 443j, and a third bottom wall 443k. In this modification, as described above, the guide rail main body 440 is formed by a single member. This reduces the number of components of the guide rail main body 440 and the number of steps required to manufacture the guide rail main body 440 compared to the present embodiment, in which the guide rail main body 40 is formed by three members: the first rail member 43, the second rail member 44, and the third rail member 45. Therefore, the number of components and the number of steps required to manufacture the lower guide rail 408 and the sliding door device 401 can be reduced.

[0136] The present invention is not limited to the above-described embodiments, and other configurations and methods may be adopted within the scope of the technical concept of the present invention. For example, as long as it is possible to prevent the lower frame from being exposed to the outside, the configuration of the cover member is not limited to the above-described embodiments, and may be formed of, for example, one member or three or more members. Furthermore, the second cover member may be attached to the guide rail main body with a configuration similar to that of the first cover member. Furthermore, the second cover member may be formed of a single member. Furthermore, the first cover member and the second cover member may be configured to have a cover portion on only one side in the first direction.

[0137] As long as the lower frame and the anti-vibration member can be housed inside and the sliding door can be supported so as to be movable in the opening and closing direction, the configuration of the guide rail main body is not limited to this embodiment, and for example, the first hanging portion and the second hanging portion do not have to be provided, which simplifies the configuration of the guide rail main body.

[0138] The sliding door device to which the present invention is applied is not limited to a double-swing sliding door device, but can also be applied to a single-swing sliding door device.Furthermore, the sliding door device to which the present invention is applied is not limited to an electric sliding door device, but can also be applied to a manual sliding door device. [Explanation of symbols]

[0139] 1,101,201,301,401...sliding door device, 6...sliding door, 8,108,208,308,408...lower guide rail, 20...door portion, 25...lower frame, 26...anti-vibration member, 30...fixed wall, 40,140,340,440...guide rail main body portion, 40a...opening, 41...first storage portion, 42...second storage portion, 50,150,250...lid member, 51,151...first cover member, 52,152...first cover portion (cover portion), 53,153...second cover portion (cover portion), 55,255...second cover member, 56,256...third cover portion (cover portion), 57,257...fourth cover portion (cover portion), D1...first direction

Claims

1. A lower guide rail supports a sliding door, which has a door section, a lower frame fixed to a vertically lower end of the door section, and a vibration prevention member fixed to a vertically lower end of the lower frame, so as to be movable in an opening / closing direction perpendicular to the vertical direction, a guide rail main body portion extending along the opening and closing direction; a cover member attached to the guide rail main body; Equipped with The guide rail main body is a first housing portion having an opening that opens vertically upward and that houses the lower frame therein; a second housing portion disposed vertically below the first housing portion and housing at least a portion of the vibration prevention member therein; and In a first direction perpendicular to both the vertical direction and the opening / closing direction, an internal dimension of the first accommodating portion is larger than an internal dimension of the second accommodating portion; the cover member extends in the opening / closing direction and closes a portion of the opening, The cover member has a first cover member, The first cover member extends along the opening and closing direction, the first cover member is detachably attached to the guide rail main body, The first cover member has a pair of cover portions arranged opposite each other with a gap in the first direction.

2. the first housing portion has an inner surface on both sides in the first direction, the inner surface being disposed with a gap between the first housing portion and the lower frame; The lower guide rail according to claim 1 , wherein the second housing portion supports the anti-vibration member so as to be slidable in the opening and closing direction.

3. The cover member has a second cover member, The second cover member extends along the opening and closing direction, the first cover member and the second cover member are arranged side by side in the opening and closing direction, the second cover member is fixed to the guide rail main body, The lower guide rail according to claim 1 or 2, wherein the second cover member has a pair of cover portions arranged opposite each other with a gap in the first direction.

4. A lower guide rail according to claim 3; a fixed wall extending along a plane perpendicular to the first direction; a sliding door supported by the lower guide rail so as to be movable in the opening and closing direction and movable in the opening and closing direction relative to the fixed wall; Equipped with A sliding door device, wherein the first cover member overlaps with the fixed wall when viewed in the first direction.

Images