Soundproof sliding door structure

Abstract

To provide a soundproof sliding door structure that is easy to open and close. [Solution] The soundproof sliding door structure 1 comprises a sliding door 3 having a first surface 14 and a second surface 15 that close an opening 8, a wheel unit 4, a rail unit 7 that guides the wheel unit 4 in the opening and closing direction, and an airtight material 5 located at the lower end of the sliding door 3. The wheel unit 4 has an axle 30, a first wheel 31, and a second wheel 32. The first wheel 31 has a first tapered surface 34 that extends radially outward and moves away from the first surface 14, and the second wheel 32 similarly has a second tapered surface 38 that moves away from the second surface 15. The rail portion 7 has a first abutment portion 46 that abuts the first tapered surface 34, a second abutment portion 47 that abuts the second tapered surface 38, a first guide portion 48 and a second guide portion 49 that guide the first wheel 31 and the second wheel 32 downward as they move toward the closed position, and a support portion 45 that abuts the airtight material 5 when the sliding door 3 is in the closed position.

Description

[Technical Field]

[0001] The present invention relates to a soundproof sliding door structure that is easy to open and close. [Background technology]

[0002] The sliding door arrangement structure described in Patent Document 1 includes an upper rail groove and a lower rail groove located opposite each other at the lintel and threshold, a door plate that moves via a door roller to open and close the opening width, and a lower packing attached to the lower bottom surface of the door plate. The lower packing comes into close contact with the threshold when the door plate closes the opening. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 7-21993 Summary of the Invention [Problem to be solved by the invention]

[0004] The lower rail groove has a substantially V-shaped cross section. The lower rail groove is connected to a recessed portion located deeper than the lower rail groove and in the depth direction via a guide path with a downward taper. Therefore, when the door panel is moved from the open position to the closed position, the door panel moves downward and in the depth direction along the guide portion while also moving into the recessed portion. In other words, the door panel moves in three directions: the opening / closing direction, downward, and in the depth direction, making it difficult for users unfamiliar with opening and closing door panels to understand how to operate the door panel.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a soundproof sliding door structure that can be easily opened and closed by the same operation as a general sliding door. [Means for solving the problem]

[0006] (1) A soundproof sliding door structure according to the present invention includes a wall having an opening, a sliding door having first and second surfaces that close the opening, a wheel portion at least partially protruding downward from the bottom surface of the sliding door, a rail portion located on the bottom surface of the opening and guiding the wheel portion in the opening / closing direction, and a first member located at the bottom end of the sliding door. The wheel portion has an axis extending in a direction intersecting the opening / closing direction of the sliding door, a first wheel that rotates about the axis, and a second wheel that rotates about the axis. The first wheel has a first tapered surface that extends radially outward and moves away from the first surface of the sliding door, and the second wheel has a second tapered surface that extends radially outward and moves away from the second surface of the sliding door. The rail portion has a first abutment portion that abuts against the first tapered surface of the first wheel to support the first wheel, a second abutment portion that abuts against the second tapered surface of the second wheel to support the second wheel, a first guide portion that guides the first wheel downward as the sliding door moves toward the closed position, a second guide portion that guides the second wheel downward as the sliding door moves toward the closed position, and a second member that abuts against the first member when the sliding door is in the closed position.

[0007] When the sliding door is moved from the open position to the closed position, it first moves along a horizontal straight line, then moves diagonally downward along that straight line. Therefore, the user only needs to operate the sliding door in the straight line to open or close it, making it as easy to operate as a regular sliding door. Furthermore, because the sliding door does not move in the cross direction, there is no need to take up large dimensions for installing rails in the cross direction, resulting in a compact soundproof sliding door structure. Furthermore, because the first member can be separated from the second member except when in the closed position, resistance to the opening and closing operation can be reduced. Furthermore, deterioration of the first member due to friction with the second member is suppressed, achieving high airtightness and stable soundproofing effects.

[0008] (2) The rail portion has a first groove and a second groove extending in the opening / closing direction, the first abutment portion and the first guide portion being the upper end of the first groove, and the second abutment portion and the second guide portion being the upper end of the second groove.

[0009] A sufficient space can be secured to allow the tips of the first tapered surface and the second tapered surface to move when the wheel portion moves downward.

[0010] (3) The first surface and the first tapered surface face in the same direction, and the second surface and the second tapered surface face in the same direction.

[0011] When the rail portion moves toward the closed position, the separation distance in the intersecting direction between the first guide portion and the second guide portion increases. Therefore, when the sliding door moves toward the closed position, the wheel portion moves downward, with the first tapered surface and the second tapered surface sandwiched between the first guide portion and the second guide portion. At this time, the wheel portion is less likely to receive load in the direction in which the axis bends, preventing damage. Furthermore, the support portion can be made a constant dimension in the left-right direction, allowing for a relatively large area in contact with the airtight material.

[0012] (4) The first member is located between the first wheel and the second wheel in the intersecting direction.

[0013] Since the first member is located at the center of the sliding door in the intersecting direction, the door is supported at the center in the closed position, and the posture is stable.

[0014] (5) The sliding door further includes a receiving portion located above the opening, and the sliding door has a protrusion protruding from the upper end in the intersecting direction and a third member located on the underside of the protrusion, and the receiving portion has an abutment surface located below the third member, and the third member abuts against the abutment surface when the sliding door is in the closed position.

[0015] When the sliding door is in the closed position, the third member is sandwiched between the protrusion and the abutment surface, sealing the gap between the top of the sliding door and the receiving part. The third member is sealed by the weight of the sliding door, providing a high level of airtightness and stable soundproofing.

[0016] (6) The first member has a magnetic body, and the second member is magnetically attracted to the magnetic body.

[0017] When the sliding door is moved to the closed position, the gap between the sliding door and the second member is reliably sealed.

[0018] (7) The upper surface of the second member is at the same height as the floor of the room partitioned by the wall.

[0019] Since the second member and the rail portion do not protrude above the floor surface when the sliding door is in the open position, a barrier-free soundproof sliding door structure can be achieved. [Effects of the Invention]

[0020] According to the present invention, it is possible to provide a soundproof sliding door structure that can be easily opened and closed by the same operation as a general sliding door. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view showing a soundproof sliding door structure 1 according to one embodiment of the present invention. [Figure 2] FIG. 2 is a view of the first surface 14 side of the sliding door 3 as seen obliquely from the front. [Figure 3] FIG. 3 is a bottom view of the sliding door 3. FIG. [Figure 4] FIG. 4 is a partially enlarged cross-sectional view showing the upper part of the sliding door 3 together with the receiving portion 6 when the sliding door 3 is in the open position. [Figure 5] FIG. 5 is a partially enlarged cross-sectional view showing the wheel portion 4 together with the rail portion 7 when the sliding door 3 is in the open position. [Figure 6] FIG. 6 is a plan view of the rail portion 7. As shown in FIG. [Figure 7] FIG. 7 is a plan view showing the position of the sliding door 3 in the open position together with the rail portion 7. As shown in FIG. [Figure 8] FIG. 8 is a plan view showing the position of the sliding door 3 in the closed position together with the rail portion 7. As shown in FIG. [Figure 9] FIG. 9 is a partially enlarged cross-sectional view showing the wheel portion 4 together with the rail portion 7 when the sliding door 3 is in the closed position. [Figure 10]FIG. 10 is a partially enlarged cross-sectional view showing the upper part of the sliding door 3 together with the receiving portion 6 when the sliding door 3 is in the closed position. [Figure 11] FIG. 11 is a cross-sectional view showing a part of the wheel portion 4A of the soundproof sliding door structure 1 according to the first modification together with the rail portion 7A in an enlarged manner. [Figure 12] FIG. 12 is a plan view showing a rail portion 7A of the soundproof sliding door structure 1 according to the first modification. [Figure 13] FIG. 13 is a partially enlarged cross-sectional view showing the wheel portion 4A of the soundproof sliding door structure 1 according to the first modification in a state where the wheel portion 4A is located in the closed position, together with the rail portion 7A. [Figure 14] Figure 14(a) is a partially enlarged cross-sectional view showing the state when the wheel section 4 of the soundproof sliding door structure 1 of variant example 2 is in the open position, and Figure 14(b) is a partially enlarged cross-sectional view showing the state when the wheel section 4 is in the closed position. [Figure 15] Figure 15(a) is a partially enlarged cross-sectional view showing the state when the wheel section 4 of the soundproof sliding door structure 1 of variant example 3 is in the open position, and Figure 15(b) is a partially enlarged cross-sectional view showing the state when the wheel section 4 is in the closed position. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the embodiment described below is merely an example of how the present invention is realized, and it goes without saying that the embodiment can be modified as appropriate without departing from the spirit and scope of the present invention.

[0023] Hereinafter, the directions relating to the soundproof sliding door structure 1 will be referred to as the up-down direction, the left-right direction, and the front-to-back direction. The up-down direction is a direction parallel to the longitudinal direction of the installed sliding door 3. The up direction is the direction from the threshold 104 to the lintel 103, and the down direction is the direction from the lintel 103 to the threshold 104. The left-to-right direction is a direction perpendicular to the up-down direction and parallel to the thickness direction of the sliding door 3. The left direction is the direction in which the second surface 15 of the sliding door 3 faces, and the right direction is the direction in which the first surface 14 faces. The front-to-back direction is a direction perpendicular to the up-down direction and the left-to-right direction and is the width direction of the sliding door 3. The front is the direction toward the door edge, and the rear is the opposite direction.

[0024] [Soundproof sliding door structure 1] The soundproof sliding door structure 1 is installed in a building where people live, such as a house. The soundproof sliding door structure 1 prevents sound from passing through gaps between a first room 100 and an adjacent second room 101. As shown in Figures 1 and 3, the soundproof sliding door structure 1 comprises a wall 2, a sliding door 3, a wheel unit 4, an airtight material 5, a receiving unit 6, and a rail unit 7. The first room 100 and the second room 101 are each an example of a living room.

[0025] The wall 2 separates the first room 100 from the second room 101 within the house. The wall 2 has an opening 8 through which people can enter and exit. The opening 8 is defined at its upper side by a lintel 103. The opening 8 is defined at its lower side by a threshold 104 on which a rail section 7 (described later) is located. The front side of the opening 8 is defined by a front vertical frame 105. As shown in FIG. 6 , the rear side of the opening 8 is defined by an end surface 2a of the wall 2. The vertical and front-to-rear dimensions of the opening 8 are slightly smaller than the vertical and front-to-rear dimensions of the sliding door 3.

[0026] [Sliding door 3] The sliding door 3 moves between a closed position where it closes the opening 8 and an open position where it opens the opening 8. The sliding door 3 is one door in the soundproof sliding door structure 1. As shown in FIG. 7, the sliding door 3 in the closed position is located to the right of the wall 2. As shown in FIG. 2, the sliding door 3 has a door body 10, a handle 11, a protrusion 12, and an airtight material 13. The airtight material 13 is an example of a third member.

[0027] The door body 10 is a plate-shaped body with a predetermined thickness in the left-right direction. The door body 10 is longer in the up-down direction than in the front-to-back direction. The dimension of the door body 10 in the left-to-right direction is smaller than that of the threshold 104. The dimension of the door body 10 in the front-to-back direction is smaller than the dimension of the threshold 104 in the front-to-back direction and larger than half the dimension of the threshold 104 in the front-to-back direction.

[0028] The pull tab 11 is located near the front end of the first surface 14, which is the surface facing to the right of the door body 10. Although not shown in the figures, the pull tab is also located near the front end of the second surface 15, which is the surface facing to the left of the door body 10.

[0029] As shown in Figures 2 and 3, the protrusion 12 is located at the upper end of the first surface 14. The protrusion 12 protrudes to the right from the first surface 14 of the door body 10. The protrusion 12 is, for example, a square pillar, and has the same dimensions in the front-to-rear direction as the door body 10. The dimension of the protrusion 12 in the left-to-right direction is approximately half the dimension of the door body 10 in the left-to-right direction.

[0030] The airtight material 13 seals the gap between the door body 10 and the lintel 103. As shown in Figures 3 and 4, the airtight material 13 is located on the underside 16 of the protrusion 12. The airtight material 13 is, for example, cylindrical in shape. The diameter dimension of the airtight material 13 is smaller than the left-right dimension of the protrusion 12. The airtight material 13 is an elastic material that can be compressed and deformed, such as rubber or silicone. The length of the airtight material 13 in the front-to-rear direction is the same as the length of the protrusion 12 in the front-to-rear direction.

[0031] [Receptacle 6] The receiving portion 6 is located at the top of the sliding door 3 and restricts the sliding door 3 from moving in the left-right direction. The receiving portion 6 is located above the opening 8. The receiving portion 6 is located to the right of the sliding door 3. As shown in FIG. 4, the receiving portion 6 extends from the lintel 103. The receiving portion 6 has a first extension portion 17 and a second extension portion 18. The first extension portion 17 extends from the lintel 103 to a position below the airtight material 13. The first extension portion 17 extends from the rear vertical frame 106 to the front vertical frame 105 in the front-to-rear direction.

[0032] The second extension portion 18 extends to the left from the lower end of the first extension portion 17. The second extension portion 18 extends to a position to the left of the airtight material 13. The dimension of the second extension portion 18 in the front-to-rear direction is the same as that of the first extension portion 17. An abutment surface 19 is located on the upper surface of the second extension portion 18. The abutment surface 19 is located below the airtight material 13. The abutment surface 19 abuts against the airtight material 13 when the sliding door 3 is in the closed position.

[0033] [Wheel part 4] The two wheel units 4 move the sliding door 3 along the rail unit 7 to the closed position and the open position. As shown in FIG. 3, one of the two wheel units 4 is located near the front end at the lower end 20 of the sliding door 3. The other of the two wheel units 4 is located near the rear end at the lower end 20 of the sliding door 3. In other words, the two wheel units 4 are located near the front end and the rear end on the lower surface 21. As shown in FIGS. 3 and 5, two recesses 22 are located on the lower surface 21 of the sliding door 3. Each wheel unit 4 enters one of the recesses 22. The wheel unit 4 is located approximately in the center of the lower surface 21 in the left-right direction. As shown in FIG. 5, the wheel unit 4 has an axle 30, a first wheel 31, and a second wheel 32.

[0034] The shaft 30 has a cylindrical shape extending in a direction parallel to the left-right direction. The shaft 30 is rotatably supported within the recess 22. The lower end 33 of the shaft 30 is located slightly above the lower end 20 of the sliding door 3. The direction parallel to the left-right direction is an example of an intersecting direction.

[0035] The first wheel 31 is fixed to the right side of the shaft 30. A portion of the first wheel 31 protrudes downward from the lower surface 21 of the sliding door 3. The first wheel 31 has a first tapered surface 34 and a first inner surface 35. The first tapered surface 34 is a surface that faces right, similar to the first surface 14. The first tapered surface 34 is a surface that expands radially outward from the shaft 30 while moving away from the first surface 14. The first inner surface 35 is located to the left of the first tapered surface 34 and expands from an outer edge 36 of the first tapered surface 34 toward the shaft 30. The first inner surface 35 is a surface that faces left. The first inner surface 35 is a plane that is perpendicular to the center of the shaft 30.

[0036] The second wheel 32 is fixed to the left side of the shaft 30. The second wheel 32 is located to the left of and spaced apart from the first wheel 31. The shape of the second wheel 32 is symmetrical to that of the second wheel 31 with respect to a plane extending in the up-down and front-rear directions at the center position of the sliding door 3 in the left-right direction.

[0037] The second wheel 32 has a second tapered surface 38 and a second inner surface 39. The second tapered surface 38, like the second surface 15, faces left. The second tapered surface 38 is a surface that expands radially outward from the axis 30 while moving away from the second surface 15. The distance between the first tapered surface 34 and the second tapered surface 38 in the left-right direction decreases as it moves radially outward from the axis 30. The second inner surface 39 is located to the right of the second tapered surface 38 and expands from an outer edge 40 of the second tapered surface 38 toward the axis 30. The second inner surface 39 is a surface that faces right and is parallel to the first inner surface 35. The second inner surface 39 is a flat surface that faces opposite the first inner surface 35.

[0038] [Airtight material 5] The airtight material 5 has soundproofing and sealing functions. The airtight material 5 is an elastic material that can be compressed and deformed, such as rubber or silicone. The airtight material 5 has a rectangular shape that is longer in the front-to-rear direction than in the left-to-right direction, and has a predetermined thickness in the up-to-down direction. The airtight material 5 is located at the bottom end 20 of the sliding door 3, and extends in the front-to-rear direction along the bottom surface 21 of the sliding door 3. The airtight material 5 is located in the center of the sliding door 3 in the left-to-right direction. In other words, the airtight material 5 is located below the shaft 30 of the wheel unit 4, between the first wheel 31 and the second wheel 32.

[0039] [Rail part 7] The rail portion 7 guides the first wheel 31 and the second wheel 32 when the sliding door 3 is opened or closed. As shown in FIG. 1, the rail portion 7 is located on the underside of the opening 8. The rail portion 7 extends in the front-to-rear direction at the threshold 104. As shown in FIGS. 5 and 6, the rail portion 7 has a first groove 43, a second groove 44, a support portion 45, a first abutment portion 46, a second abutment portion 47, a first guide portion 48, and a second guide portion 49. The support portion 45 is an example of a second member.

[0040] The first groove 43 is a groove that extends in the front-to-rear direction on the upper surface 108 of the threshold 104. The first groove 43 is located to the right of the center in the left-to-right direction of the upper surface 108. A part of the first wheel 31 is located within the first groove 43. A bottom 53 of the first groove 43 is located below the first wheel 31 in the closed position.

[0041] The second groove 44 is a groove that extends in the front-to-rear direction on the upper surface 108 of the threshold 104, and is located to the left of the first groove 43. The second groove 44 is located to the left of the center in the left-to-right direction of the upper surface 108. A part of the second wheel 32 is located within the second groove 44. A bottom 54 of the second groove 44 is located below the second wheel 32 in the closed position.

[0042] The support portion 45 presses against the airtight material 5 of the sliding door 3 in the closed position in the vertical direction. The upper surface 56 of the support portion 45 abuts against the airtight material 5 when the sliding door 3 is in the closed position. The support portion 45 is located between the first groove 43 and the second groove 44 in the left-right direction. In other words, the support portion 45 is located in the center of the threshold 104 in the left-right direction. The corners on the left and right of the upper surface 56 of the support portion 45 are chamfered. The upper surface 56 is at the same height as the floor surfaces 109, 110 of the first chamber 100 and the second chamber 101.

[0043] The first abutment portion 46 supports the first wheel 31. The first abutment portion 46 is located to the right of the support portion 45. The first abutment portion 46 is located on the upper surface 108 of the threshold 104 and at the upper end of the first groove 43. The first tapered surface 34 abuts against the first abutment portion 46. As shown in FIG. 6, the first abutment portion 46 is located on the rear side of the rail portion 7 in the fore-and-aft direction and towards the front of the center in the fore-and-aft direction. The first abutment portion 46 extends in a straight line in the fore-and-aft direction.

[0044] The second abutment portion 47 supports the second wheel 32. The second abutment portion 47 is located to the left of the support portion 45. The second abutment portion 47 is located on the upper surface 108 of the threshold 104 and at the upper end of the second groove 44. As shown in FIG. 6 , the second abutment portion 47 is located at the same position as the first abutment portion 46 in the front-to-rear direction. The second abutment portion 47 is parallel to the first abutment portion 46. The second tapered surface 38 abuts against the second abutment portion 47. The distance between the first abutment portion 46 and the second abutment portion 47 in the left-to-right direction is constant. The distance between the first abutment portion 46 and the second abutment portion 47 in the left-to-right direction is shorter than the longest distance between the first tapered surface 34 and the second tapered surface 38 in the left-to-right direction.

[0045] The first guide portion 48 guides the first wheel 31 downward toward the closed position. The first guide portion 48 is located to the right of the support portion 45. The first guide portion 48 is located rearward of the front end of the rail portion 7 and the center in the front-to-rear direction. As shown in FIG. 5, the first tapered surface 34 abuts against the first guide portion 48. The first guide portion 48 is located on the upper surface 108 of the threshold 104 and at the upper end of the first recessed groove 43. The first guide portion 48 is located forward of the first abutment portion 46 and is continuous with the front end of the first abutment portion 46. As shown in FIG. 6, the first guide portion 48 bends diagonally to the right from the front end of the first abutment portion 46 and extends linearly. The first guide portion 48 moves away from the support portion 45 as it extends forward. When viewed from the left and right, the first guide portion 48 extends horizontally and linearly.

[0046] The second guide portion 49 guides the second wheel 32 downward toward the closed position. The second guide portion 49 is located to the left of the support portion 45. The second guide portion 49 is located at the same position as the first guide portion 48 in the front-to-rear direction. As shown in FIG. 5, the second tapered surface 38 abuts against the second guide portion 49. The second guide portion 49 is located on the upper surface 108 of the threshold 104 and at the upper end of the second recessed groove 44. As shown in FIG. 6, the second guide portion 49 is located forward of the second abutment portion 47 and is continuous with the front end of the second abutment portion 47. The second guide portion 49 bends diagonally leftward from the front end of the second abutment portion 47 and extends linearly. The second guide portion 49 moves away from the support portion 45 as it extends forward. When viewed from the left-right direction, the second guide portion 49 extends horizontally and linearly. The distance between the first guide portion 48 and the second guide portion 49 in the left-right direction increases toward the front. The shortest distance between the first guide portion 48 and the second guide portion 49 in the left-right direction is approximately the same as the distance between the first abutment portion 46 and the second abutment portion 47 in the left-right direction. The longest distance between the first guide portion 48 and the second guide portion 49 in the left-right direction is longer than the distance between the first abutment portion 46 and the second abutment portion 47 in the left-right direction. Note that the longest distance between the first guide portion 48 and the second guide portion 49 in the left-right direction does not have to be longer than the longest distance between the first tapered surface 34 and the second tapered surface 38 in the left-right direction.

[0047] [Soundproof sliding door structure 1 operation] The opening and closing operation of the sliding door 3 in this embodiment will be described below. As shown in Figures 5 and 7, when the sliding door 3 is in the open position, the first wheel 31 and the second wheel 32 are positioned on the first abutment portion 46 and the second abutment portion 47. At this time, the sliding door 3 is positioned to the right of the wall 2. The rear end of the sliding door 3 abuts against the rear vertical frame 106.

[0048] 5, the first wheel 31 and the second wheel 32 abut against the first abutment portion 46 and the second abutment portion 47 at positions radially outward of the first tapered surface 34 and the second tapered surface 38. In this state, the airtight material 5 is spaced upward from the support portion 45. Also, as shown in FIG. 4, the airtight material 13 located on the lower surface 16 of the protrusion 12 is spaced upward from the abutment surface 19 of the receiving portion 6.

[0049] When a user grips the handle 11 and pushes the sliding door 3 forward, the first wheel 31 and the second wheel 32 rotate on the first abutment portion 46 and the second abutment portion 47, and the sliding door 3 moves forward from the closed position. The first wheel 31 and the second wheel 32 move forward horizontally and in a straight line along the first abutment portion 46 and the second abutment portion 47. Before the sliding door 3 reaches the closed position, the first wheel 31 moves from the first abutment portion 46 to the first guide portion 48. In addition, the second wheel 32 moves from the second abutment portion 47 to the second guide portion 49.

[0050] The first wheel 31 and the second wheel 32 moving forward on the first guide portion 48 and the second guide portion 49 move downward as the distance along the left-right direction of the first guide portion 48 and the second guide portion 49 increases. As the sliding door 3 approaches the closed position, the positions at which the first tapered surface 34 and the second tapered surface 38 abut against the first guide portion 48 and the second guide portion 49, respectively, move radially inward. As the sliding door 3 moves downward, the airtight material 5 approaches the support portion 45. In addition, the airtight material 13 approaches the abutment surface 19.

[0051] As shown in FIG. 8 , when the user pushes the sliding door 3 further forward, the front end of the sliding door 3 abuts against the front vertical frame 105, and the sliding door 3 is positioned in the closed position. As shown in FIG. 9 , when the sliding door 3 is in the closed position, the first wheel 31 and the second wheel 32 abut against the first guide portion 48 and the second guide portion 49 at radially inward positions of the first tapered surface 34 and the second tapered surface 38. At this time, the airtight material 5 is sandwiched between the sliding door 3 and the support portion 45 and is compressed and deformed. This blocks sound and air in the gap between the sliding door 3 and the threshold 104. Furthermore, as shown in FIG. 10 , the airtight material 13 is sandwiched between the lower surface 16 of the protrusion 12 and the abutment surface 19 of the receiving portion 6 and is compressed and deformed, so that sound and air are blocked in the gap between the sliding door 3 and the lintel 103. This provides soundproofing and sealing functions above and below the sliding door 3.

[0052] When a user pushes the sliding door 3 backward from the closed position, the sliding door 3 moves backward. At this time, the first wheel 31 and the second wheel 32 move upward as the distance along the left-right direction between the first guide portion 48 and the second guide portion 49 becomes shorter. As the first wheel 31 and the second wheel 32 positioned on the first guide portion 48 and the second guide portion 49 approach the first abutment portion 46 and the second abutment portion 47, the positions where the first tapered surface 34 and the second tapered surface 38 abut against the first guide portion 48 and the second guide portion 49, respectively, move radially outward. As the sliding door 3 moves upward, the airtight material 5 moves away from the support portion 45. Furthermore, the airtight material 13 moves away from the abutment surface 19.

[0053] As shown in FIG. 7, when the user pushes the sliding door 3 further rearward, the rear end of the sliding door 3 abuts against the rear vertical frame 106, and the sliding door 3 is positioned in the open position. As shown in FIG. 5, when the sliding door 3 is in the open position, the first wheel 31 and the second wheel 32 abut against the first abutment portion 46 and the second abutment portion 47 at positions radially outward of the first tapered surface 34 and the second tapered surface 38. At this time, the airtight material 5 moves away from the support portion 45 and returns to its original state. In this way, when opening or closing the sliding door 3, the user only needs to push it forward or rearward, and does not need to operate it in the up-down or left-right directions as with a general sliding door.

[0054] [Effects of soundproof sliding door structure 1] When the sliding door 3 moves to the closed position, the first tapered surface 34 and the second tapered surface 38 slide downward along the first guide portion 48 and the second guide portion 49. When the sliding door 3 then moves to the closed position, the airtight material 5 is sandwiched between the sliding door 3 and the support portion 45. In other words, when the sliding door 3 moves from the open position to the closed position, it first moves along a horizontal straight line and then moves diagonally downward along that straight line. Therefore, to open or close the sliding door 3, the user only needs to apply force in the straight line direction, making operation similar to that of a typical sliding door simple. Furthermore, because the sliding door 3 does not move left or right, there is no need to increase the dimensions for installing the rail portion 7 in the left or right direction, resulting in a compact soundproof sliding door structure 1. Furthermore, the airtight material 5 can be separated from the support portion 45 except when the sliding door is in the closed position, reducing resistance during opening and closing operations. Furthermore, the reduction in friction between the airtight material 5 and the support portion 45 suppresses deterioration of the airtight material 5, thereby achieving high airtightness and stable soundproofing effects.

[0055] The presence of the first groove 43 and the second groove 44 ensures sufficient space for the radially outer outer edges 36, 40 of the first tapered surface 34 and the second tapered surface 38 to move when the first wheel 31 and the second wheel 32 move downward.

[0056] The first tapered surface 34 faces the same direction as the first surface 14 of the sliding door 3 in the left-right direction, and moves away from the first surface 14 as it extends radially outward. The second tapered surface 38 faces the same direction as the second surface 15, and moves away from the second surface 15 as it extends radially outward. The first guide portion 48 and the second guide portion 49 of the rail portion 7 move further apart in the left-right direction as they move forward. Therefore, when the sliding door 3 moves to the closed position, the first tapered surface 34 and the second tapered surface 38 are sandwiched between the first guide portion 48 and the second guide portion 49, and the wheel portion 4 moves downward between the first guide portion 48 and the second guide portion 49. At this time, the shaft 30 of the wheel portion 4 is less likely to be subjected to a load in a bending direction and is less likely to be damaged.

[0057] Since the airtight material 5 is located in the center of the sliding door 3 in the left-right direction, the sliding door 3 is supported in the center in the closed position, and the posture is stable.

[0058] When the sliding door 3 is in the closed position, the airtight material 13 is sandwiched between the protrusion 12 and the abutment surface 19, so the gap between the sliding door 3 and the receiving part 6 is sealed by the airtight material 13. At this time, the airtight material 13 is sealed by the weight of the sliding door 3, so high airtightness and stable soundproofing effects are achieved.

[0059] Because the upper surface 56 of the support portion 45 is at the same height as the floor surfaces 109, 110 of the first room 100 and the second room 101, the support portion 45 does not protrude from the floor surfaces 109, 110 when the sliding door 3 is in the open position. This allows for a barrier-free soundproof sliding door structure 1 to be realized.

[0060] [Variation 1] In the soundproof sliding door structure 1 in the above-described embodiment, the first tapered surface 34, like the first surface 14, faces rightward and extends radially outward from the axis 30, moving away from the first surface 14. The second tapered surface 38, like the second surface 15, faces leftward and extends radially outward from the axis 30, moving away from the second surface 15. While the above-described embodiment has been described using the above-described example, the present invention is not limited to this configuration. As shown in FIG. 11 , the soundproof sliding door structure 1 may have a first tapered surface 34A that extends radially outward from the axis 30 and approaches the first surface 14. Alternatively, the second tapered surface 38A may extend radially outward from the axis 30 and approach the second surface 15. 12, the first guide portion 48A and the second guide portion 49A of the rail portion 7A may be located on the support portion 45A, and the distance between them may become smaller as they move toward the closed position. This will be explained in detail below.

[0061] The soundproof sliding door structure 1 has the same configuration as the embodiment, except for the wheel portion 4A and rail portion 7A, including the wall 2, sliding door 3, airtight material 5, and receiving portion 6, and therefore will not be described further. As shown in Figure 11, the wheel portion 4A has an axle 30, a first wheel 31A, and a second wheel 32A.

[0062] The first wheel 31A is fixed to the right side of the shaft 30. A portion of the first wheel 31A protrudes downward from the lower surface 21 of the sliding door 3. The first wheel 31A has a first tapered surface 34A and a first outer surface 60A. The first tapered surface 34A, like the second surface 15, faces left. The first tapered surface 34A is a surface that expands radially outward from the shaft 30 while approaching the first surface 14. The first outer surface 60A is located to the right of the first tapered surface 34A and expands from the outer edge 36A of the first tapered surface 34A toward the shaft 30. The first outer surface 60A is a surface that faces right. The first outer surface 60A is a plane that is perpendicular to the center of the shaft 30.

[0063] The second wheel 32A is fixed to the left side of the shaft 30. The second wheel 32A is located to the left of the first wheel 31A and is spaced apart. The shape of the second wheel 32A is symmetrical to that of the first wheel 31A with respect to a plane extending in the up-down and front-rear directions at the center position of the sliding door 3 in the left-right direction.

[0064] The second wheel 32A has a second tapered surface 38A and a second outer surface 61A. The second tapered surface 38A, like the first surface 14, faces right. The second tapered surface 38A is a surface that expands radially outward from the shaft 30 while approaching the second surface 15. The distance between the first tapered surface 34A and the second tapered surface 38A in the left-right direction increases as it expands radially outward from the shaft 30. The second outer surface 61A is located to the left of the second tapered surface 38A and expands from the outer edge 40A of the second tapered surface 38A toward the shaft 30. The second outer surface 61A is a surface that faces left. The second outer surface 61A is a plane that is perpendicular to the center of the shaft 30 and is parallel to the first outer surface 60A.

[0065] [Rail section 7A] The rail portion 7A guides the first wheel 31A and the second wheel 32A when opening and closing the sliding door 3. As shown in Fig. 12, the rail portion 7A extends in the front-to-rear direction at the threshold 104A. As shown in Figs. 11 and 12, the rail portion 7A has a first groove 43A, a second groove 44A, a support portion 45A, a first contact portion 46A, a second contact portion 47A, a first guide portion 48A, and a second guide portion 49A.

[0066] The first groove 43A is a groove that extends in the front-to-rear direction on the upper surface 108A of the threshold 104A. The first groove 43A is located to the right of the center in the left-to-right direction on the upper surface 108A. A part of the first wheel 31A is located within the first groove 43A. A bottom 53A of the first groove 43A is located below the first wheel 31A in the closed position.

[0067] The second groove 44A is a groove that extends in the front-to-rear direction on the upper surface 108A of the threshold 104A and is aligned with the first groove 43A. The second groove 44A is located to the left of the center in the left-to-right direction on the upper surface 108A. A portion of the second wheel 32A is located within the second groove 44A. A bottom 54A of the second groove 44A is located below the second wheel 32A in the closed position.

[0068] As shown in FIG. 13, the support portion 45A presses against the airtight material 5 of the sliding door 3 in the closed position in the vertical direction. The upper surface 56A of the support portion 45A abuts against the airtight material 5 when the sliding door 3 is in the closed position. The support portion 45A is located between the first groove 43A and the second groove 44A in the left-right direction, and is located in the center of the threshold 104A in the left-right direction. The support portion 45A has corners on the left and right of the upper surface 56A. The upper surface 56A is at the same height as the floor surfaces of the first chamber 100 and the second chamber 101.

[0069] As shown in Figures 11 and 12, the first abutment portion 46A is located on the upper surface 56A of the support portion 45A and at the upper end of the first groove 43A, i.e., at the right corner of the support portion 45A. The first tapered surface 34A abuts against the first abutment portion 46A. As shown in Figure 12, the first abutment portion 46A is located on the rear side of the rail portion 7A in the front-to-rear direction and toward the front of the center in the front-to-rear direction. The first abutment portion 46A extends in a straight line in the front-to-rear direction. When viewed from the left and right, the first abutment portion 46A extends horizontally in a straight line. The first abutment portion 46A is at the same height as the upper surface 108A of the threshold 104A.

[0070] The first guide portion 48A guides the first wheel 31A downward toward the closed position. As shown in FIG. 12, the first guide portion 48A is located forward of the first abutment portion 46A. The first guide portion 48A is located on the upper surface 56A of the support portion 45A and at the upper end of the first recessed groove 43A, i.e., at the right corner of the support portion 45A. The first guide portion 48A is located rearward of the front end of the rail portion 7A and the center in the front-to-rear direction. The first tapered surface 34A abuts against the first guide portion 48A. The first guide portion 48A is continuous with the front end of the first abutment portion 46A. As the first guide portion 48A moves forward, it approaches the center in the left-to-right direction of the support portion 45A. When viewed left-to-right, the first guide portion 48A extends horizontally and in a straight line.

[0071] The second contact portion 47A is located on the upper surface 56A of the support portion 45A and at the upper end of the second recessed groove 44A, i.e., at the left corner of the support portion 45A. The second tapered surface 38A abuts against the second contact portion 47A. The second contact portion 47A is located to the left of the first contact portion 46A. The second contact portion 47A is in the same position as the first contact portion 46A in the front-rear direction. The second contact portion 47A is parallel to the first contact portion 46A. When viewed from the left-right direction, the second contact portion 47A extends horizontally and in a straight line, overlapping with the first contact portion 46A. The distance between the first contact portion 46A and the second contact portion 47A in the left-right direction is constant. The distance between the first contact portion 46A and the second contact portion 47A in the left-right direction is longer than the shortest distance between the first tapered surface 34A and the second tapered surface 38A in the left-right direction.

[0072] The second guide portion 49A guides the second wheel 32A downward toward the closed position. The second guide portion 49A is located forward of the second abutment portion 47A. When viewed from the front-to-rear direction, the second guide portion 49A is located on the upper surface 56A of the support portion 45A and at the upper end of the second recessed groove 44A, i.e., at the left corner of the support portion 45A. The second guide portion 49A is located to the left of the first guide portion 48A. The second tapered surface 38A abuts against the second guide portion 49A. The second guide portion 49A is continuous with the front end of the second abutment portion 47A. The second guide portion 49A approaches the center of the support portion 45A in the left-to-right direction as it moves forward. In other words, the distance between the first guide portion 48A and the second guide portion 49A in the left-to-right direction becomes shorter as it moves forward. When viewed from the left-right direction, the second guide portion 49A extends horizontally and in a straight line. The longest distance in the left-right direction between the first guide portion 48A and the second guide portion 49A is approximately the same as the distance in the left-right direction between the first abutment portion 46A and the second abutment portion 47A. The shortest distance in the left-right direction between the first guide portion 48A and the second guide portion 49A is shorter than the distance in the left-right direction between the first abutment portion 46A and the second abutment portion 47A. Note that the shortest distance in the left-right direction between the first guide portion 48A and the second guide portion 49A does not have to be shorter than the shortest distance in the left-right direction between the first tapered surface 34 and the second tapered surface 38.

[0073] [Operation of the soundproof sliding door structure 1 according to the first modification] The opening and closing operation of the sliding door 3 of the soundproof sliding door structure 1 according to Modification 1 will be described below. When the sliding door 3 is in the open position, the first wheel 31A and the second wheel 32A are positioned on the first abutment portion 46A and the second abutment portion 47A. At this time, as shown in FIG. 11 , the first wheel 31A and the second wheel 32A abut against the first abutment portion 46A and the second abutment portion 47A at positions radially outward of the first tapered surface 34A and the second tapered surface 38A. In this state, the airtight material 5 is spaced upward from the support portion 45A.

[0074] When a user grips the handle 11 and pushes the sliding door 3 forward, the first wheel 31A and the second wheel 32A rotate on the first abutment portion 46A and the second abutment portion 47A, and the sliding door 3 moves forward from the closed position. The first wheel 31A and the second wheel 32A move forward horizontally and in a straight line along the first abutment portion 46A and the second abutment portion 47A. Before the sliding door 3 reaches the closed position, the first wheel 31A and the second wheel 32A that have moved forward move from the first abutment portion 46A and the second abutment portion 47A to the first guide portion 48A and the second guide portion 49A.

[0075] The first wheel 31A and the second wheel 32A moving forward on the first guide portion 48A and the second guide portion 49A move downward as the distance in the left-right direction between the first guide portion 48A and the second guide portion 49A becomes shorter. As the sliding door 3 approaches the closed position, the positions at which the first tapered surface 34A and the second tapered surface 38A abut against the first guide portion 48A and the second guide portion 49A, respectively, move radially inward. As the sliding door 3 moves downward, the airtight material 5 approaches the support portion 45A.

[0076] When the user pushes the sliding door 3 further forward, the front end of the sliding door 3 abuts against the front vertical frame 105, and the sliding door 3 is positioned in the closed position. As shown in FIG. 13 , when the sliding door 3 is in the closed position, the first wheel 31A and the second wheel 32A abut against the first abutment portion 46A and the second abutment portion 47A at positions radially inward of the first tapered surface 34A and the second tapered surface 38A. At this time, the airtight material 5 is sandwiched between the sliding door 3 and the support portion 45A and is compressed and deformed. This blocks sound and air from entering the gap between the sliding door 3 and the threshold 104A.

[0077] When a user pushes the sliding door 3 backward from the closed position, the sliding door 3 moves backward. At this time, the first wheel 31A and the second wheel 32A move upward as the distance in the left-right direction of the first guide portion 48A and the second guide portion 49A increases. As the first wheel 31A and the second wheel 32A positioned on the first guide portion 48A and the second guide portion 49A approach the first abutment portion 46A and the second abutment portion 47A, the positions where the first tapered surface 34A and the second tapered surface 38A abut against the first guide portion 48A and the second guide portion 49A, respectively, move radially outward. As the sliding door 3 moves upward, the airtight material 5 moves away from the support portion 45A.

[0078] When the user pushes the sliding door 3 further rearward, the rear end of the sliding door 3 abuts against the rear vertical frame 106, and the sliding door 3 is positioned in the open position. As shown in FIG. 13 , when the sliding door 3 is in the open position, the first wheel 31A and the second wheel 32A abut against the first abutment portion 46A and the second abutment portion 47A at positions radially inward of the first tapered surface 34A and the second tapered surface 38A. At this time, the airtight material 5 moves away from the support portion 45A and returns to its original state. In this way, when opening or closing the sliding door 3, the user only needs to push it rearward, and there is no need to operate it in the up-down or left-right directions.

[0079] Because the first wheel 31A and the second wheel 32A are supported by the support portion 45A, it is possible to make the outer dimensions of the first groove 43A and the second groove 44A of the threshold 104A relatively small in the left-right direction, thereby realizing a soundproof sliding door structure 1 that is more compact in the left-right direction.

[0080] [Variation 2] In the soundproof sliding door structure 1 in the above embodiment, the airtight material 5 located at the bottom end 20 of the sliding door 3 is an elastic material that can be compressed and deformed, such as rubber or silicone, but this configuration is not limiting. For example, the airtight material 5B may have a magnetic material 64B, as shown in Figures 14(a) and 14(b).

[0081] Specifically, the airtight material 5B extends in the front-to-rear direction along the underside 21B of the sliding door 3 and is located in the center in the left-to-right direction. The magnetic body 64B is a sheet-like magnet. When viewed from the top-to-bottom direction, the magnetic body 64B has the same rectangular shape that is long in the front-to-rear direction as the airtight material 5B. The magnetic body 64B has a predetermined thickness and is located above the airtight material 5B. The airtight material 5B is fixed to the underside 21B of the sliding door 3. The support portion 45B is a magnetic material such as iron to which the magnetic body 64B is magnetically attracted.

[0082] As shown in FIG. 14(a), when the sliding door 3 is in the open position, the airtight material 5B is spaced upward from the support portion 45B. When the user moves the sliding door 3 forward, the airtight material 5B approaches the support portion 45B. When the user moves the sliding door 3 to the closed position, as shown in FIG. 14(b), the airtight material 5B is magnetically attached to the support portion 45B. At this time, the airtight material 5B is sandwiched between the magnetic body 64B and the support portion 45B.

[0083] When the sliding door 3 is moved to the closed position, the airtight material 5B is magnetically attached to the support part 45B, reliably sealing the gap between the sliding door 3 and the support part 45B. This reliably provides soundproofing and sealing functions between the sliding door 3 and the threshold 104.

[0084] [Variation 3] In the soundproof sliding door structure 1 in the above embodiment, the airtight material 5 is positioned between the first wheel 31 and the second wheel 32 in the left-right direction, but this configuration is not limiting. In the soundproof sliding door structure 1, the airtight material 5C may be positioned outward of the first wheel 31 and the second wheel 32 in the left-right direction.

[0085] Specifically, the airtight material 5C is located on the left and right sides of the underside 21 of the sliding door 3. The airtight material 5C extends in the front-to-rear direction along the underside 21 of the sliding door 3. The airtight material 5C has a rectangular shape that is longer in the front-to-rear direction than in the left-to-right direction, and has a predetermined thickness in the up-down direction.

[0086] As shown in Figure 15(a), the airtight materials 5C located on the left and right sides of the underside 21C are spaced apart from the left and right upper surfaces 108C of the threshold 104C when in the open position. When the sliding door 3 is in the closed position, as shown in Figure 15(b), the airtight materials 5C abut outside the first groove 43 and the second groove 44 on the upper surface 108C of the threshold 104 in the left-right direction. The sliding door 3 is stably supported on the threshold 104 on the left and right sides.

[0087] [Other variations] In the above embodiment, an example was described in which the soundproof sliding door structure 1 is installed on the wall 2 that separates the first room 100 and the second room 101, but this configuration is not limiting. The soundproof sliding door structure 1 may also be installed on a wall that separates a living room from a non-living room.

[0088] In the above embodiment, the soundproof sliding door structure 1 has been described as having one sliding door 3, but this configuration is not limiting. The number of sliding doors 3 in the soundproof sliding door structure 1 may be two or more. In this case, the soundproof sliding door structure 1 may have an additional airtight material in the gaps between the sliding doors 3 that seals the gaps when the sliding doors are in the closed position.

[0089] In the above-described embodiment, the sliding door 3 is located to the right of the wall 2, but an airtight material for sealing the gap may be located between the sliding door 3 and the wall. The airtight material may, for example, protrude toward the wall 2 on the rear side of the door main body 10 and abut against the wall 2. Alternatively, the airtight material may protrude toward the door main body 10 on the front side of the wall 2 and abut against the door main body 10 in the closed position.

[0090] In the above embodiment, the case where the lower end 33 of the shaft 30 is located slightly above the lower end 20 of the sliding door 3 has been described as an example, but this is not the only possible configuration. The lower end 33 of the shaft 30 may be located at the same position as the lower end 20 of the sliding door 3.

[0091] In the above embodiment, the shaft 30 is rotatably supported within the recess 22, but the present invention is not limited to this configuration. The shaft 30 may be rotatably supported by a metal fitting fixed to or fitted within the recess 22.

[0092] In the above-described embodiment, the airtight materials 5 and 13 are elastic materials that can be compressed and deformed, such as rubber or silicone, but the present invention is not limited to this configuration. The airtight materials 5 and 13 may be any materials that can block sound and air.

[0093] In the above-described second modification, the magnetic body 64B is a sheet-shaped magnet, but the present invention is not limited to this configuration. The magnetic body 64B may be, for example, a plurality of magnets embedded in the airtight material 5C.

[0094] In the above-mentioned modified example 3, the case where the airtight material 5C is located at two locations, the front and rear, of the lower end 20 of the sliding door 3 has been described as an example, but the present invention is not limited to this configuration. The airtight material 5C may be located only at the front or only at the rear of the lower end 20 of the sliding door 3.

[0095] [Appendix 1] a wall having an opening; a sliding door having a first surface and a second surface that closes the opening; A wheel portion at least partially protruding downward from the lower surface of the sliding door; a rail portion located on a lower surface of the opening and guiding the wheel portion in an opening / closing direction; a first member located at the lower end of the sliding door, The wheel part is an axis extending in a direction intersecting the opening and closing direction of the sliding door; a first wheel that rotates about the axis; a second wheel that rotates about the axis; the first wheel has a first tapered surface that extends radially outward and moves away from a first surface of the sliding door; the second wheel has a second tapered surface that extends radially outward and moves away from the second surface of the sliding door; The rail section is a first contact portion that contacts the first tapered surface of the first wheel to support the first wheel; a second contact portion that contacts the second tapered surface of the second wheel to support the second wheel; a first guide portion that guides the first wheel downward as the sliding door moves toward a closed position; a second guide portion that guides the second wheel downward as the sliding door moves toward a closed position; A soundproof sliding door structure having a second member that abuts against the first member when the sliding door is in a closed position.

[0096] [Appendix 2] the rail portion has a first groove and a second groove extending in the opening and closing direction, the first contact portion and the first guide portion are upper ends of the first groove, The soundproof sliding door structure according to claim 1, wherein the second contact portion and the second guide portion are upper ends of the second groove.

[0097] [Appendix 3] the first surface and the first tapered surface face in the same direction; 3. The soundproof sliding door structure according to claim 1, wherein the second surface and the second tapered surface face in the same direction.

[0098] [Appendix 4] The soundproof sliding door structure according to any one of claims 1 to 3, wherein the first member is positioned between the first wheel and the second wheel in the intersecting direction.

[0099] [Appendix 5] The device further includes a receiving portion located above the opening, the sliding door has a protrusion protruding from an upper end portion in the intersecting direction and a third member located on a lower surface of the protrusion, the receiving portion has an abutment surface located below the third member, The soundproof sliding door structure according to any one of appendixes 1 to 4, wherein the third member abuts against the abutment surface when the sliding door is in a closed position.

[0100] [Appendix 6] 6. The soundproof sliding door structure according to any one of claims 1 to 5, wherein the first member has a magnetic body, and the second member is magnetically attached to the magnetic body.

[0101] [Appendix 7] A soundproof sliding door structure according to any one of claims 1 to 6, wherein the upper surface of the second member is at the same height as the floor of the room separated by the wall. [Explanation of symbols]

[0102] 1. Soundproof sliding door structure 2. Wall 3. Sliding door 4, 4A...Wheel part 5, 5B, 5C... Airtight material (first component) 6 Receiving part 7, 7A... Rail section 8...Aperture 12. Projection 13. Airtight material (third component) 14...Front page 15...2nd page 16: Lower surface of protrusion 12 19...Abutment surface 21, 21B, 21C... Underside of sliding door 3 20. Bottom edge of sliding door 30 axes 31, 31A...1st wheel 32, 32A...2nd wheel 34, 34A: First tapered surface 38, 38A... Second tapered surface 43, 43A... First groove 44, 44A...Second groove 45, 45A, 45B... Support portion (second member) 46, 46A...1st contact part 47, 47A...Second contact part 48, 48A...1st guide section 49, 49A...Second guide section 56, 56A: Upper surfaces of the support portions 45, 45A 64B...Magnetic material 109, 110...Floor

Claims

1. a wall having an opening; a sliding door having a first surface and a second surface that closes the opening; A wheel portion at least partially protruding downward from the lower surface of the sliding door; a rail portion located on a lower surface of the opening and guiding the wheel portion in an opening / closing direction; a first member located at a lower end of the sliding door, The wheel part is an axis extending in a direction intersecting the opening and closing direction of the sliding door; a first wheel that rotates about the axis; a second wheel that rotates about the axis; The first wheel has a first tapered surface that extends radially outward and moves away from a first surface of the sliding door, the second wheel has a second tapered surface that extends radially outward and moves away from the second surface of the sliding door; The rail section is a first contact portion that contacts the first tapered surface of the first wheel to support the first wheel; a second contact portion that contacts the second tapered surface of the second wheel to support the second wheel; a first guide portion that guides the first wheel downward as the sliding door moves toward a closed position; a second guide portion that guides the second wheel downward as the sliding door moves toward a closed position; a second member that abuts against the first member when the sliding door is in a closed position.

2. the rail portion has a first groove and a second groove extending in the opening and closing direction, the first contact portion and the first guide portion are upper ends of the first groove, The soundproof sliding door structure according to claim 1, wherein the second contact portion and the second guide portion are upper ends of the second groove.

3. the first surface and the first tapered surface face in the same direction; 3. The soundproof sliding door structure according to claim 1, wherein the second surface and the second tapered surface face in the same direction.

4. 3. The soundproof sliding door structure according to claim 1, wherein the first member is located between the first wheel and the second wheel in the cross direction.

5. The device further includes a receiving portion located above the opening, the sliding door has a protrusion protruding from an upper end portion in the intersecting direction and a third member located on a lower surface of the protrusion, the receiving portion has an abutment surface located below the third member, 3. The soundproof sliding door structure according to claim 1, wherein the third member abuts against the abutment surface when the sliding door is in the closed position.

6. the first member has a magnetic body, The soundproof sliding door structure according to claim 1 or 2, wherein the second member is magnetically attracted to the magnetic body.

7. 3. The soundproof sliding door structure according to claim 1, wherein the upper surface of the second member is flush with the floor of the room partitioned by the wall.

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