Roller type one-side sliding door body

Abstract

To provide a roller type one-side sliding door body capable of blocking a gap between upper and lower parts and insulating sound with a simple configuration.SOLUTION: A roller type one-side sliding door body comprises a sliding door body 10 having at a lower end 11 a roller 17 that can roll in the opening and closing direction parallel to a wall 9, a lower rail 5 that is installed on a support upper surface 4 that extends horizontally at the height of a lower end of an opening and that extends in the opening and closing direction to guide the roller 17, an upper frame 1 that has an upper groove 21 into which an upper end 12 of the sliding door body 10 fits and that extends in the opening and closing direction along the upper end of the opening and the wall 9, and a lower seal member 31 that seals a gap between the lower end 11 of the sliding door body 10 and the support upper surface 4. The roller 17 and the lower rail 5 are positioned offset in a thickness direction Y of the sliding door body 10 from directly below the center of gravity of the sliding door body 10. The sliding door body 10 tilts in the thickness direction Y toward the center of gravity with a contact point 17a between the roller 17 and the lower rail 5 as a fulcrum, thereby bringing the upper end 12 of the sliding door body 10 into tightly contact with an inner wall surface 21a of the upper groove 21.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a roller-type single sliding door body that improves sound insulation. [Background technology]

[0002] In order to improve sound insulation, conventional sliding door devices have a contact portion at the end of the sliding door body that faces the mullion at the intersection of the closed sliding door body and the mullion, and a sound-insulating seal member is provided between the contact portion and the mullion. In addition, conventional sliding door devices also have a sound-insulating seal member provided between the edge of the closed sliding door body and the door stop frame. Such a sliding door device is disclosed, for example, in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5734676 Summary of the Invention [Problem to be solved by the invention]

[0004] In the sliding door device disclosed in Patent Document 1, the gap above and below the sliding door body is closed by a lift-up shutter device that opens the gap when the sliding door body is opened and closes the gap when the sliding door body is closed. However, the structure of the lift-up shutter device is complex and prone to breakdown. Sliding doors used in residential units are required to have a structure that is durable even after years of use. In particular, sliding doors used in residential units are opened and closed frequently, so in order to make them less prone to breakdown, it was necessary to close the gaps above and below the sliding door body with as simple a structure as possible.

[0005] The present invention has been devised to solve the above-mentioned problems. That is, the object of the present invention is to provide a roller-type single sliding door body that can block the gap between the upper and lower parts and insulate noise with a simple structure. [Means for solving the problem]

[0006] According to the present invention, there is provided a roller-type single sliding door body that opens and closes an opening provided in a wall that separates compartments in a building, and closes these compartments in a sound-insulating manner, A sliding door body having a door roller at a lower end portion that can roll in an opening and closing direction parallel to the wall; a lower rail that is installed on a support upper surface that extends horizontally at the height of a lower end of the opening, extends in the opening / closing direction, and guides the door roller; an upper frame having an upper groove for receiving an upper end of the sliding door body and guiding it in the opening / closing direction, the upper frame extending in the opening / closing direction along the upper end of the opening and the wall; a lower sealing member that seals the gap between the lower end of the sliding door body and the support upper surface, The door roller and the lower rail are positioned offset to one side in the thickness direction of the sliding door body from directly below the center of gravity of the sliding door body, A roller-type single sliding door body is provided in which the sliding door body tilts in the thickness direction toward the other side in the thickness direction with the contact point between the roller and the lower rail as a fulcrum, thereby bringing the upper end of the sliding door body into close contact with the inner wall surface on the other side of the upper groove. [Effects of the Invention]

[0007] According to the present invention described above, the roller and lower rail are positioned to one side in the thickness direction from directly below the center of gravity of the sliding door body. This allows the sliding door body to tilt to the other side in the thickness direction with the contact point between the roller and lower rail as a fulcrum, allowing the upper end of the sliding door body to be in close contact with the inner wall surface of the upper groove. Therefore, the upper end of the sliding door body is pressed against the upper groove of the upper frame, improving sound insulation of the upper part of the sliding door body.

[0008] Furthermore, the single sliding door body of the present invention has the door roller positioned to one side in the thickness direction (the door roller side) from directly below the center of gravity of the sliding door body, so that the lower sealing member can be positioned on the other side in the thickness direction (the center of gravity side). This allows the sliding door body to tilt toward the center of gravity, thereby pressing the lower seal member against the upper support surface, thereby further improving the sound insulation of the single sliding door body of the present invention. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a front view of a roller-type single sliding door body according to a first embodiment of the present invention in an open state. [Figure 2] FIG. 2 is a rear view of the roller-type single sliding door body of the first embodiment of the present invention in a closed state. [Figure 3] FIG. 3 is a view taken along the arrow AA in FIG. 2. [Figure 4] FIG. 2 is a view taken along the arrow CC in FIG. [Figure 5] FIG. 3 is a view taken along the arrow BB in FIG. 2. [Figure 6] FIG. 10 is a comparative explanatory diagram of four types of door rollers and door roller rails with the V-shaped door roller and V-shaped rail used in the first embodiment when the sliding door body is about to tilt. [Figure 7] FIG. 2 is a view taken along the arrow DD in FIG. [Figure 8] 2 is a view taken along the arrow DD in FIG. 1 when the sliding door body is closed. [Figure 9] 2 is a view taken along the arrow EE in FIG. 1 when the sliding door body is closed. [Figure 10] 1 is an explanatory diagram of a sliding door body 10 of a roller-type single sliding door body of a first embodiment when having a ventilation opening. FIG. [Figure 11] 5 is a view of the roller-type single sliding door body of the second embodiment as seen from the arrow BB in FIG. 2. FIG. [Figure 12] 1 when the sliding door body of the roller-type single sliding door body of the third embodiment is closed. FIG. [Figure 13] 1 when the sliding door body of the roller-type single sliding door body of the third embodiment is closed. FIG. [Figure 14] 10 is a view of the roller-type single sliding door body of the fourth embodiment as seen from the arrow BB in FIG. 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, common parts in the drawings are given the same reference numerals, and duplicated explanations will be omitted.

[0011] (First embodiment) FIG. 1 is a front view of a roller-type single sliding door body 100 according to a first embodiment of the present invention in an open state. The roller-type single sliding door 100 of this embodiment (hereinafter simply referred to as the single sliding door 100) is a roller-type single sliding door. This single sliding door 100 is used by being attached to an opening 8 provided in a wall 9 that separates compartments (hereinafter simply referred to as compartments) in a building such as an apartment building or a detached house, in order to soundproof and close off each room or hallway from one another. The opening 8 may be a doorway for people to enter and exit, or it may be a ventilation window.

[0012] In the following description, the direction in which the sliding door body 10 opens and closes (the horizontal direction parallel to the surface of the wall 9) is referred to as the opening / closing direction X, and the side of the sliding door body 10 in that direction where the door tip is located is referred to as the door tip side, and the opposite side is referred to as the door trailing side. The door tip side end of the sliding door body 10 is referred to as the "door tip portion 13," and the door trailing side end is referred to as the "door trailing portion 14."

[0013] As shown in FIG. 1, a single sliding door body 100 according to this embodiment includes a frame body 20, a sliding door body 10, a lower rail 5, a seal member 30, and a wall body 9a. The outside of the frame body 20 is surrounded by a wall 9 and a floor 4b. The frame body 20 has a leading vertical frame 2, a middle mullion 3, and a top frame 1. The leading vertical frame 2 stands at the leading end 8b of the opening 8, and the middle mullion 3 stands at the trailing end 8c. The top frame 1 extends in the opening / closing direction X at the top end 8a of the opening 8. The single sliding door body 100 of the first embodiment has only one middle mullion 3.

[0014] The frame 20 may also have a bottom frame 4a extending in the opening / closing direction X at the bottom end 8d of the opening 8, or a trailing edge vertical frame 29 extending downward from the trailing edge 1c of the upper frame 1 and supporting the trailing edge 1c. The bottom frame 4a and trailing edge vertical frame 29 may or may not be present depending on the design of the single sliding door body 100. The frame 20 may be made of wood or metal such as steel.

[0015] The leading edge vertical frame 2 and the middle mullion 3 are fixed to the wall 9 at the leading edge end 8b and trailing edge end 8c of the opening 8, respectively. The door-front vertical frame 2 extends vertically along the door-front end 8b of the opening 8, with its lower portion extending downward below the sliding door main body 10. A vertical groove 23 extending vertically opens on the opening-side end face 2a of the door-front vertical frame 2 facing the opening 8. When the sliding door main body 10 closes the opening 8, the door-front portion 13 of the sliding door main body 10 enters the vertical groove 23.

[0016] The top frame 1 has its leading end 1a supported by the leading vertical frame 2, and extends from the upper end 2b of the leading vertical frame 2 toward the trailing edge along the upper end 8a of the opening 8. The middle part of the top frame 1 is supported by the middle mullion 3, and a portion of it extends further toward the trailing edge along the wall 9. An upper groove 21 extending in the opening / closing direction X is open on the lower surface 1b of the top frame 1. The upper groove 21 is provided in the upper frame 1 in a portion that extends along the wall 9 toward the door tail side beyond the middle mullion 3 (the portion on the near side in the drawing). This allows the sliding door body 10 to move back and forth in the opening and closing direction X along the upper groove 21, parallel to the wall body 9a.

[0017] A wall 9a is provided at a position closer to the tail end of the middle mullion 3 and below the top frame 1. The wall 9a may be a buttress that is thinner than the wall 9 that surrounds the frame 20. However, the wall 9a is not limited to this, and may be a part of the wall 9 that is continuous with the wall 9 that surrounds the periphery of the frame 20.

[0018] A trailing edge side vertical frame 29 may be provided on the trailing edge side of the wall body 9a. When the trailing edge side vertical frame 29 is provided, the trailing edge side vertical frame 29 is fixed to the wall body 9a and supports the upper frame 1.

[0019] The frame body 20 may have a lower frame 4a at its lower end, facing the upper frame 1. The upper surface of the lower frame 4a is preferably at the same height as the floor surface (the upper surface of the floor 4b) or slightly (about 1 mm) higher than the floor surface. However, the upper surface of the lower frame 4a may be higher or lower than the floor surface as long as it is 3 mm or less. A lower rail 5 that matches the shape of the door roller 17 is provided on the upper surface of the lower frame 4a. Furthermore, if the lower rail 5 is laid directly on the floor surface, the lower frame 4a may not be necessary.

[0020] The lower rail 5 extends in the opening and closing direction X from within the vertical groove 23 of the door-leading side vertical frame 2 to the same position as the door trailing end side end of the upper groove 21 in the opening and closing direction X. A stopper 28 is fixed to the end of the upper groove 21 and the lower rail 5 on the trailing edge side of the door to stop the sliding door body 10 from moving towards the trailing edge side.

[0021] The sliding door body 10 is parallel to the wall 9 and has a pair of side surfaces 10a, 10b facing the inside of the compartment, sized to cover the opening 8. The sliding door body 10 may have ventilation openings 19 at the upper end of one side surface and at the lower end of the other side surface. The sliding door body 10 is preferably made of wood, but may also be made of metal. In the following description of the first embodiment, of the pair of side surfaces, the side surface facing the central mullion 3 in the thickness direction Y of the sliding door body 10 (hereinafter simply referred to as the thickness direction Y) is referred to as the center-of-gravity side surface 10a, and the side surface facing away from the center-of-gravity side surface 10a is referred to as the roller-side side surface 10b. The leading end of the sliding door body 10 is referred to as the leading portion 13, and the trailing end of the sliding door body 10 is referred to as the trailing portion 14. In addition, in the description of the first embodiment, the direction in which the central mullion 3 is located as viewed from the sliding door body 10 in the thickness direction Y is referred to as the "middle mullion side," the "center-of-gravity side," or the "other side in the thickness direction Y of the sliding door body 10." The opposite side is referred to as the "anti-moulder side," the "roller side," or the "one side in the thickness direction Y of the sliding door body 10."

[0022] 1 shows the roller-side side surface 10b visible from the front. As shown in this figure, the sliding door body 10 may be provided with ventilation openings 19 such as an intake port 19a and an exhaust port 19b. However, if ventilation performance is not required for the single sliding door body 100 of this embodiment, a sliding door without ventilation openings 19 may be used as the sliding door body 10.

[0023] The sliding door body 10 has a handle 13a at the door end portion 13. The sliding door body 10 may also have a key 13b at the door end portion 13. The sliding door body 10 has a pair of rollers 17 that can roll in the opening and closing direction X at the leading end and trailing end of its lower end 11. The lower end 11 of the sliding door body 10 is provided with a lower seal member 31 that extends from the leading end 13 to the trailing end 14 of the sliding door body 10.

[0024] The sliding door body 10 also has an abutment portion 16 at the door end portion 14. The abutment portion 16 extends in the height direction along the door end portion 14, protrudes toward the wall 9 (wall body 9a), and is a portion that faces the door end side end surface 3a of the middle mullion 3 when the sliding door body 10 is closed. For example, it is preferable that the upper end of the abutment portion 16 is located at the same height as the door shoulder 12b. The lower end of the abutment portion 16 may be located at the same height as the lower end of the sliding door body 10, or may be located lower than the lower end of the sliding door body 10.

[0025] 2 is a rear view of the single sliding door body 100 of the first embodiment of the present invention in a closed state. This figure shows the single sliding door body 100 as seen from the compartment where the middle mullion 3 is located. 2 shows the center-of-gravity side surface 10a of the sliding door body 10. In the example of this figure, an air intake port 19a, which is a ventilation opening 19, is provided at the lower end of the center-of-gravity side surface 10a.

[0026] The mullion 3 is fixed to the door-end end of the wall body 9a. Additionally, the portion of the upper frame 1 on the middle mullion side, which is located between the leading vertical frame 2 and the middle mullion 3, extends in the opening / closing direction X from the leading vertical frame 2 to the middle mullion 3 (i.e., from the leading end 8b of the opening 8 to the trailing end 8c), and then ends there. As a result, when viewed from the middle mullion side of the single sliding door body 100, it appears as if a wall 9 extends from the middle mullion 3 to the trailing end.

[0027] Fig. 3 is a view taken along the arrow AA in Fig. 2, and Fig. 4 is a view taken along the arrow CC in Fig. 1. Fig. 5 is a view taken along the arrow BB in Fig. 2. Both Fig. 4 and Fig. 5 are views of the trailing edge of the sliding door body 10, but the difference is that the sliding door body 10 in Fig. 4 is open, while the sliding door body 10 in Fig. 5 is closed. In these figures, 12a represents the door neck at the upper end 12 of the sliding door body 10, and 12b represents the door shoulder. Note that in these figures, the ventilation through-holes 18 and ventilation openings 19 of the sliding door body 10 are omitted. In Figure 3, the door-front vertical frame 2 supports the door-front end 1a of the upper frame 1, and the upper frame 1 extends from there toward the door trailing edge (the front side of the paper in the figure) in the opening and closing direction X. The upper frame 1 is provided with an upper groove 21 that is recessed upward in a U-shape from the lower surface 1b. The upper groove 21 has a pair of vertical planes parallel to the wall 9 as inner wall surfaces 21a. The width of the upper groove 21 in the thickness direction Y is set to be slightly larger than the width of the door neck 12a of the sliding door body 10. A resin rail member 22 may be fitted into the upper groove 21. By having the resin rail member 22 cover the inner wall surfaces 21a of the upper groove 21, the resistance generated between the sliding door body 10 and the upper frame 1 can be reduced, making the opening and closing operation of the sliding door body 10 easier.

[0028] The door-end vertical frame 2 has an opening at its opening-side end face 2a and a vertical groove 23 recessed in a U-shape from the opening-side end face 2a toward the door end in the opening / closing direction X. The vertical groove 23 has a pair of inner wall surfaces 23a at both ends in the thickness direction Y that extend in the height direction parallel to the wall 9. The width of the vertical groove 23 in the thickness direction Y is set to be larger than the width of the upper groove 21 in the thickness direction Y. Furthermore, the width of the vertical groove 23 in the thickness direction Y is set to be larger than the thickness of the sliding door body 10. When the sliding door body 10 is installed in the frame body 20, it is installed at a position where a gap can be secured between both end faces in the thickness direction Y of the door tip portion 13 of the sliding door body 10 and the pair of inner wall surfaces 23a of the vertical groove 23. In other words, the upper groove 21 and the lower rail 5 are provided at a position where a gap is created between the sliding door body 10 and the pair of inner wall surfaces 23a of the vertical groove 23.

[0029] The upper end 12 of the sliding door body 10 of the first embodiment is notched to form a door neck 12a and a door shoulder 12b. The door neck 12a is the part of the notched upper end 12 of the sliding door body 10 that protrudes upward. The door neck 12a of the sliding door body 10 of the first embodiment is inserted into the upper groove 21 and guided in the opening / closing direction X along the inner wall surface 21a of the upper groove 21. The sliding door body 10 of the first embodiment is provided with the door neck 12a facing the middle mullion side in the thickness direction Y.

[0030] A door roller 17 and a lower seal member 31 are attached to the lower end portion 11 of the sliding door body 10. Furthermore, a lower rail 5 is laid at a position facing the door rollers 17 on the supporting upper surface 4 which extends horizontally at the height of the lower end of the opening 8. In the following explanation, the supporting upper surface 4 refers to the upper surface of the lower frame 4a if the single sliding door body 100 has a lower frame 4a. Furthermore, in the case of a single sliding door body 100 where the lower rail 5 is laid directly on the floor 4b and there is no lower frame 4a, the supporting upper surface 4 refers to the upper surface of the floor 4b on which the lower rail 5 is laid.

[0031] The sealing member 30 seals the gap between the sliding door main body 10 and the frame body 20, and includes a lower sealing member 31, a door edge sealing member 32, and a door trailing edge sealing member 33. The door trailing edge sealing member 33 seals the gap between the door trailing edge 14 of the sliding door main body 10 and the frame body 20. The door trailing edge sealing member 33 will be described later with reference to FIG. 7. 3, the lower sealing member 31 is attached to the lower end portion 11 of the sliding door body 10, and seals the gap between the lower end portion 11 and the supporting upper surface 4. The lower sealing member 31 seals the gap between the lower end portion 11 and the supporting upper surface 4 by hanging a flexible film member 31a made of resin or rubber from the lower end portion 11 of the sliding door body 10 to the supporting upper surface 4.

[0032] A pair of door edge seal members 32 are provided on a pair of inner wall surfaces 23a extending in the height direction at both ends in the thickness direction Y of the vertical groove 23. The door edge seal members 32 seal a pair of gaps surrounded by both side surfaces 10a, 10b in the thickness direction Y of the sliding door body 10 when closed, the lower surface 1b of the upper frame 1, the pair of inner wall surfaces 23a extending in the height direction at both ends in the thickness direction Y of the vertical groove 23, and the support upper surface 4. The door edge seal members 32 extend vertically from the support upper surface 4 to the lower surface 1b of the upper frame, and seal the gap between the door edge portion 13 and the pair of inner wall surfaces 23a when the sliding door body 10 is closed. The door edge seal members 32 are made of rubber or resin that is soft enough to distort in response to the tilt of the sliding door body 10 when it is tilted. The door edge seal members 32 are crushed differently at the top and bottom when the sliding door body 10 is tilted. When the sliding door body 10 tilts, the upper side of the door edge seal member 32 on the center mullion side (the side of the center of gravity, i.e., the other side in the thickness direction Y) is further crushed, and the upper side of the door edge seal member 32 on the anti-center mullion side (the door roller side, i.e., one side in the thickness direction Y) becomes farther from the sliding door body 10 than the lower side. Even when the upper side of the door edge seal member 32 on the anti-center mullion side becomes farther from the sliding door body 10, the door edge seal member 32 still adheres to the sliding door body 10. This can be achieved by attaching a larger door edge seal member 32 or a more flexible door edge seal member 32 to the anti-center mullion side.

[0033] Alternatively, the door edge seal member 32 can be made to adhere tightly to the sliding door body 10 even when the sliding door body 10 is far away from the top side of the door edge seal member 32 on the side opposite the center mullion by the following method. As the sliding door body 10 tilts toward the center mullion side (center of gravity side, other side), the center-of-gravity side 10a of the sliding door body 10 and the inner wall surface 23a of the vertical groove 23 on the center mullion side become closer as they move upward. Conversely, the roller-side lateral surface 10b of the sliding door body 10 and the inner wall surface 23a of the vertical groove 23 on the opposite side of the center mullion become closer as they move downward. Since the sliding door body 10 tilts around the contact point 17a between the roller 17 at its lowest end and the lower rail 5, the distance it moves in the thickness direction Y (swing width) becomes larger as it moves closer to the upper end 12 of the sliding door body 10. Therefore, if the gaps between the door edge portion 13 of the sliding door body 10 and the inner wall surface 23a closest to the vertical groove 23 are the same distance on both sides, when the sliding door body 10 tilts, the gap on the upper side becomes too large, and the door edge seal member 32 may not reach the roller-side lateral surface 10b.

[0034] Therefore, assuming that the sliding door body 10 is not tilted, the distance in the thickness direction Y from the center-of-gravity side surface 10a to the inner wall surface 23a on the center mullion side (center-of-gravity side, other side) of the vertical groove 23 may be set to be larger than the distance in the thickness direction Y from the roller-side side surface 10b to the inner wall surface 23a on the anti-center mullion side (roller side, one side) of the vertical groove 23. In this case, it is preferable that the difference in the distance in the thickness direction Y from the sliding door body 10 to each inner wall surface 23a of the vertical groove 23 is, for example, 1 to 2 mm. As a result, even if the door edge seal members 32 on the center mullion side and the anti-center mullion side are the same size, the entire door edge seal member 32 from the lower end 11 to the upper end 12 reaches the sliding door body 10. Therefore, even if the sliding door body 10 is far away from the top side of the door edge seal member 32 on the anti-center mullion side, the door edge seal member 32 can be in close contact with the sliding door body 10, thereby improving the sound insulation of the single sliding door body 100.

[0035] The shape of the tail seal member 33 may be a valve shape, a membrane shape, or a tube shape, as shown in FIG. 7 to be described later. In the above example, the tail seal member 33 is provided on the inner wall surface 23a extending parallel to the wall 9 of the vertical groove 23, but it may be provided in other locations. For example, the door edge seal member 32 may be provided on the bottom surface of the vertical groove 23 (the wall surface that contacts the small edge on the door edge side of the sliding door main body 10) or on the small edge on the door edge side of the sliding door main body 10 (the door edge side end surface of the sliding door main body 10). Alternatively, the door edge seal member 32 may be provided on the center-of-gravity side side surface 10a of the door edge portion 13 of the sliding door main body 10 (the door edge side end of the center-of-gravity side side surface 10a).

[0036] The lower rail is a rail member that is installed on the upper support surface 4 and extends in the opening / closing direction X, and guides the door roller 17 in the opening / closing direction X. The most preferred door roller 17 in this embodiment is a V-shaped door roller, and the most preferred lower rail 5 is a V-shaped rail.

[0037] 3, the dashed dotted line represents a vertical line 15a passing through the center of gravity 15 of the sliding door body 10, and the dashed two dotted line represents the axis 17b of the door roller. In a conventional roller-type sliding door, the axis 17b of the door roller is located on a vertical line passing through the center of gravity 15 of the sliding door body 10. In contrast to this, the door roller 17 and the lower rail 5 of this embodiment are positioned offset toward the anti-center mullion side (door roller side, one side) in the thickness direction Y of the sliding door body 10 from directly below the center of gravity 15 of the sliding door body 10. In other words, the present invention is characterized in that the axis 17b of the door roller 17 is offset toward the anti-center mullion side (door roller side, one side) in the thickness direction Y of the sliding door body 10 from the center of gravity 15 of the sliding door body 10.

[0038] The single sliding door body 100 of this embodiment has the door roller 17 and the lower rail 5 shifted from directly below the center of gravity 15 of the sliding door body 10 to the opposite side of the center mullion (door roller side, one side) in the thickness direction Y, which provides five advantages to the single sliding door body 100 of this embodiment. The first advantage is that the axis 17b (chain double-dashed line) of the door roller is located on the side opposite the center mullion from the vertical line 15a (chain dotted line) passing through the center of gravity 15 of the sliding door body 10, so the sliding door body 10 tilts to one side in the thickness direction Y. The tilt of the sliding door body 10 is preferably 0.01° to 2°. In this case, due to the positional relationship between the center of gravity 15 of the sliding door body 10 and the door roller 17, the sliding door body 10 always tilts toward the center of gravity where the center of gravity 15 is located (i.e., the center mullion side, the other side, the right side in Figure 3), with the contact point 17a between the door roller 17 and the lower rail 5 as the fulcrum. As the entire sliding door body 10 tilts toward the center of gravity side (center of gravity side), the end surface 12c of the upper end portion 12 of the sliding door body 10 on the center mullion side comes into close contact with the inner wall surface 21a of the upper groove 21. This closes the gap between the upper end 12 of the sliding door body 10 and the upper frame 1, making it possible to insulate the gap above the sliding door body 10 from sound.

[0039] The second advantage is that, because this embodiment can close the gap above the sliding door body 10 using this method, there is no need to provide a sealing member for sound insulation on the upper end portion 12 of the sliding door body 10 or the inner wall surface 21a of the upper groove 21. This solves the problem of the sliding door body 10 becoming heavy when opening and closing. In addition, the single-side sliding door body 100 illustrated in the figures has the surface of the upper groove 21 covered with a resin rail member 22, which allows the sliding door body 10 to be opened and closed even more smoothly.

[0040] The third advantage is that the tilt direction of the sliding door body 10 can always be determined to be toward the center mullion side. This allows the part that comes into close contact with the inner wall surface 21a of the upper groove 21 of the upper end 12 of the sliding door body 10 to be located near the door-end seal member 32 and the door-end seal member 33 when the sliding door body 10 is closed. In other words, if the sliding door body 10 is tilted toward the anti-moulder side, let's say the upper end surface of the door neck 12a on the anti-moulder side and the inner wall surface 21a of the upper groove 21 on the anti-moulder side are brought into tight contact. In this case, the gap between the upper surface of the door neck 12a and the upper groove 21 communicates with the compartment on the anti-moulder side at the door tail end, and communicates with the compartment on the central mullion side via the gap created between the end surface 12c of the door neck 12a on the central mullion side and the inner wall surface 21a of the upper groove 21 on the central mullion side. Therefore, in this hypothetical case, sound insulation between the compartments is not possible.

[0041] In contrast, in the single-side sliding door body 100 of this embodiment, the sliding door body 10 is always tilted toward the center mullion side. This allows the upper edge of the center-of-gravity side 10a of the sliding door body 10, the leading edge, and the trailing edge to be continuously in close contact with the frame body 20. That is, as shown in FIG. 3, the leading edge seal member 32 extends from the support upper surface 4 to the lower surface 1b of the upper frame. The single-side sliding door body 100 is configured so that the sliding door body 10 is attached to the frame body 20 with the neck 12a facing the center mullion side, and therefore the upper groove 21 is located inside the vertical groove 23 in the thickness direction Y, close to the inner wall surface 23a on the center mullion side. With this configuration, the upper end of the leading edge seal member 32 is located just below the portion of the neck 12a that is in close contact with the inner wall surface 23a on the center mullion side, sealing the door leading portion 13 from there to the bottom end of the sliding door body 10.

[0042] On the other hand, the abutment portion 16 on the door trailing edge 14 extends upward to the same height as the door shoulder 12b, as shown in Figure 4. The distance from the top surface of the abutment portion 16 to the bottom surface 1b of the upper frame 1 is approximately 5 mm. When the sliding door body 10 is closed, the door trailing edge seal member 33 is sandwiched between the door trailing edge end surface 3a of the middle mullion 3 and the door leading edge end surface of the abutment portion 16 (hereinafter referred to as the abutment surface 16a), as shown in Figure 5, and extends vertically and horizontally. As a result, the door trailing edge seal member 33 is expected to close or reduce the gap between the top surface of the abutment portion 16 and the bottom surface 1b of the upper frame 1. Therefore, the single sliding door body 100 of this embodiment can further improve sound insulation.

[0043] The fourth advantage is that, because the lower seal member 31 is positioned closer to the center mullion than the door roller 17 (toward the center of gravity, i.e., the other side), tilting the sliding door body 10 increases the degree of adhesion of the film member 31a of the lower seal member 31 to the supporting upper surface 4. In other words, the lower seal member 31 has the film member 31a extending downward from the lower end portion 11 of the sliding door body 10. When the sliding door body 10 tilts toward the center mullion than the door roller 17, the distance to the supporting upper surface 4 of the lower end portion 11 of the sliding door body 10, which is closer to the center mullion than the door roller 17, decreases. As a result, the film member 31a of the lower seal member 31 is pressed against the supporting upper surface 4, increasing the degree of adhesion between the film member 31a and the supporting upper surface 4, thereby improving the sound insulation of the single sliding door body 100 of this embodiment. The fifth advantage of the single sliding door body 100 of this embodiment will be described later with reference to FIG.

[0044] FIG. 6 is a comparative explanatory diagram of four types of door rollers 40 and door roller rails 41 when the sliding door main body 10 is about to tilt, and the door roller 17 and lower rail 5 used in the first embodiment. Of the door rollers 40 and door roller rails 41 in FIG. 6, (A) represents a square door roller and a square rail, (B) represents a round door roller and a rounded rail, (C) represents a Y-shaped door roller and a Y-rail, and (D) represents a T-shaped door roller and a T-rail. FIGS. 6(E) and 6(F) show the door roller 17 and lower rail 5 used in this embodiment. FIG. 6(E) shows a V-shaped door roller and a V-rail 5. FIG. 6(F) shows a door roller 17 with a R-shaped wheel shape and the corresponding lower rail 5. These figures (A) to (F) show the case where each door roller is tilted as far to the right as possible.

[0045] As shown in this figure, in the case of a door roller 40 and a door roller rail 41 in which the flange 40a and the door roller rail 41 have a vertical plane 43 perpendicular to the rotation axis, the flange 40a of the door roller 40 and the vertical plane 43 of the door roller rail 41 come into contact with each other, so the door roller 40 cannot be tilted. For example, in the case of the square door roller and square rail in Fig. 6(A) or the round door roller and half-round rail in Fig. 6(B), when the door roller 40 is tilted to the right, the lower end of the right flange 41 hits the right side surface of the door roller rail 41. If further tilting force is applied to the door roller 40 due to the weight of the sliding door body 10, there is a possibility that the flange 41 of the door roller 40 will break. Furthermore, if the door roller 40 continues to be used for a long period of time while excessive force is being applied to it, there is a possibility that the door roller 40 will come off the door roller rail 41 or the rotation axis of the door roller 40 will break.

[0046] The Y-shaped door roller and Y-rail in Figure 6(C) are fitted into the groove of the Y-rail with the central flange 41 of the door roller 40 in contact with the vertical plane 43 of the Y-rail. In this state, the Y-shaped door roller 40 is pressed against the door roller rail 41 by the weight of the sliding door main body 10. Therefore, if the sliding door main body 10 tilts, the flange 41 of the Y-shaped door roller 40 will bend and eventually break. 6(D), not only do the flange 41 of the door roller 40 and the vertical plane 43 of the door roller rail 41 fit closely together, but the circumferential surface 42 of the door roller 40 and the upper surface of the door roller rail 41 also fit closely together, so the door roller 40 cannot be tilted at all unless it is disengaged. Because the door roller 40 cannot be tilted relative to the door roller rail 41, the single sliding door body 100 of this embodiment cannot be realized.

[0047] In contrast to this, the V-shaped door roller 17 and the V-shaped rail 5 used in the single sliding door body 100 of this embodiment can easily tilt the door roller 17 without causing it to come off the track. That is, the groove 5a of the V-shaped rail 5 is tapered so that it becomes wider as it approaches the opening at the top end, so when the door roller 17 tilts, it slides along the taper and moves to the center while changing the position of contact 17a between the door roller 17 and the lower rail 5 in the groove 5a. Therefore, the door roller 17 does not come off the lower rail 5.

[0048] Furthermore, since the V-shaped door roller 17 and the V-shaped rail 5 do not have a vertical plane, the door roller 17 is not prevented from tilting, and therefore, even if the sliding door body 10 tilts, no excessive force is applied to the door roller 17. Therefore, in the single sliding door body 100 of this embodiment, by using a V-shaped door roller 17 as the door roller 17 and a V-shaped rail as the lower rail 5, the sliding door body 10 can be configured to be easily tilted with the contact point 17a between the door roller 17 and the lower rail 5 as the fulcrum.

[0049] Furthermore, even if the sliding door body 10 is tilted, no excessive force is applied to the door roller 17 and the lower rail 5, so the single sliding door body 100 can be configured to be resistant to breakage even after long-term use.

[0050] Furthermore, if there is no interlocking vertical plane 43 at the position where the lower rail 5 and the door roller 17 contact each other, the door roller 17 and lower rail 5 of this embodiment do not have to be a V-shaped door roller 17 and a V-shaped rail 5. For example, the door roller 17 and lower rail 5 of this embodiment may be as shown in Figure 6(F). The lower rail 5 of Figure 6(F) has a groove that is recessed downward in an arc shape when viewed in vertical cross section. The groove is formed by a curved surface whose width in the thickness direction Y gradually increases toward the opening at its upper end. The door roller 17 of Figure 6(F) may have a so-called R-shaped circumferential surface, in which the vertical cross section of its peripheral surface forms an arc toward the outer periphery.

[0051] Fig. 7 is a view taken along the arrow DD in Fig. 1, showing the sliding door body 10 when it is open, and Fig. 8 is a view taken along the arrow DD in Fig. 1 when the sliding door body 10 is closed. Note that the ventilation holes 18 in the sliding door body 10 are omitted. In these figures, 1 is the upper frame, 1b is the underside of the upper frame, 2 is the leading vertical frame, 2a is the opening-side end face of the leading vertical frame 2, and 9a is the wall. In the seal member 30, 32 is the leading seal member, and 33 is the trailing seal member. In addition, in this figure, the portion of the sliding door body 10 above the dashed line represents the neck 12a, and the portion below the dashed line represents the door shoulder 12b. 16 is the abutment portion, 16a is the abutment surface, 21 is the upper groove, 21a is the inner wall surface of the upper groove 21, 22 is a resin rail member, 25 is the trailing-side end face of the middle mullion 3, and 28 is the stopper.

[0052] As shown in Figure 7, a portion (upper side in Figure 7) of the upper frame 1 extends between the leading vertical frame 2 and the middle mullion 3. The remaining portion (lower side in Figure 7) of the upper frame 1 passes the middle mullion 3 in the center and continues from there along the wall 9 (wall body 9a in Figure 7) toward the trailing edge. The upper frame 1 has an upper groove 21 on the lower surface 1b of this remaining portion (lower side in Figure 7). The leading-end end 21b of the upper groove 21 is located inside the vertical groove 23 of the leading-end vertical frame 2. The upper groove 21 extends from there in the opening / closing direction X, parallel to the wall body 9a. A stopper 28 is fixed to the trailing-end end 21c of the upper groove 21.

[0053] The upper groove 21 is provided in close proximity to the inner wall surface 23a of the vertical groove 23 on the mullion side in the thickness direction Y. The distance in the thickness direction Y between the inner wall surface 23a of the vertical groove 23 on the mullion side and the inner wall surface 21a of the upper groove 21 on the mullion side and the middle mullion 3 is preferably 4 mm or less, for example, but may be 5 mm or less.

[0054] The mullion 3 is fixed to the door-front end of the wall 9a. The anti-moulder end of the mullion 3 protrudes further from the wall 9a toward the sliding door body 10. It is preferable that the anti-moulder end of the mullion 3 and the inner wall surface 23a on the mullion side of the vertical groove 23 are at the same position in the thickness direction Y. The part of the mullion 3 that protrudes further from the wall 9a on the anti-moulder side has a door-tail-side end surface 3a on the door-tail side.

[0055] The trailing edge seal member 33 is a seal member that seals the gap between the trailing edge portion 14 of the sliding door main body 10 and the frame body 20. The trailing edge seal member 33 may be provided on the trailing edge end surface 3a on the opposite side of the mullion 3. In this case, the trailing edge seal member 33 closes the gap between the trailing edge end surface 3a of the mullion 3 and the abutment portion 16 when the sliding door body 10 is closed.

[0056] The trailing edge seal member 33 extends in the height direction from the upper support surface 4 to the lower surface 1b of the upper frame 1. The trailing edge seal member 33 is preferably made of rubber or resin. It is also preferably tubular, as shown in FIG. 7. If the trailing edge seal member 33 is tubular, the length of the circumferential surface (or the circumferential length if the cross section is annular) of the tubular shape remains unchanged even when it is crushed in the opening / closing direction X. Therefore, as shown in FIG. 8, the trailing edge seal member 33, sandwiched and crushed between the center mullion 3 and the contact portion 16, expands in the thickness direction Y compared to when it is not crushed. Therefore, the crushed trailing edge seal member 33 expanded in the thickness direction Y can seal not only the gap between the contact portion 16 and the wall body 9a, but also the gap between the end of the trailing edge end surface 3a of the center mullion 3 opposite the center mullion and the center-of-gravity side surface 10a of the sliding door body 10. The cross-sectional shape of the trailing edge seal member 33 may be annular or polygonal.

[0057] The trailing edge seal member 33 is not limited to the above-described configuration. For example, the trailing edge seal member 33 may be provided on the abutment surface 16a of the abutment portion 16 of the sliding door main body 10. In this case, when the sliding door main body 10 is closed, the trailing edge seal member 33 is crushed between the trailing edge end surface 3a of the middle mullion 3 and the abutment surface 16a, thereby sealing the gap between the trailing edge portion 14 and the frame body 20.

[0058] Alternatively, if the sliding door main body 10 does not have the abutment portion 16, the trailing edge seal member 33 may be provided on the roller-side end face of the middle mullion 3 (the end face extending in the vertical direction facing the sliding door main body 10). Alternatively, if the middle mullion 3 is also not provided, the trailing edge seal member 33 may be provided on the roller-side end face of the wall body 9a (the end face extending in the vertical direction facing the sliding door main body 10). Alternatively, the trailing edge seal member 33 may be provided on the center-of-gravity side surface 10a of the trailing edge portion 14 of the sliding door main body 10 so as to protrude from the center-of-gravity side surface 10a toward the wall body 9a. In this case, the tail seal member 33 may be made of rubber or resin in a tube shape as in the above-mentioned example, or may be valve-shaped or membrane-shaped like the leading seal member 32 in FIG.

[0059] Next, a fifth advantage of the single sliding door body 100 of this embodiment will be described. FIG. 9 is a view taken along the arrow EE in FIG. 1 when the sliding door body 10 is closed. By installing the door roller 17 closer to the side opposite the center mullion (the door roller side, one side in the thickness direction Y) than the center of gravity 15 of the sliding door body 10, space is freed up on the center mullion side of the door roller 17 at the bottom end 11 of the door tip 13 and the door tail 14. The fifth advantage is that this freed up space can be used to attach a sealing member to the center mullion side of the door roller 17, which can seal the entire area of ​​the bottom end 11 of the sliding door body 10 in the opening and closing direction X.

[0060] The door rollers 17 are provided at both ends of the lower end 11 of the sliding door body 10 in the opening and closing direction X. Therefore, when installing them directly below the center of gravity 15 of the sliding door body 10, the sealing member has no choice but to be installed between the pair of door rollers 17 in the opening and closing direction X. In this regard, in the single-side sliding door body 100 of this embodiment, the attachment position of the door rollers 17 is shifted away from the center mullion side, thereby creating space at both ends of the lower end portion 11 of the sliding door body 10 in the opening / closing direction X. As a result, as shown in FIG. 9 , the single-side sliding door body 100 can position the membrane member 31a of the lower seal member 31, which extends from one end to the other of the lower end portion 11 of the sliding door body 10 in the opening / closing direction X, at the lower end portion 11 of the sliding door body 10. In other words, because the attachment location of the lower seal member 31 is on the center mullion side (the center of gravity side, the other side in the thickness direction Y) of the lower end portion 11 of the sliding door body 10, the lower seal member 31 can be positioned close to the door leading seal member 32 and the door trailing seal member 33. When the sliding door body 10 is closed, the edge of the door leading portion 13 (the end face of the sliding door body 10 facing the bottom surface of the vertical groove 23) comes into contact with the bottom surface of the vertical groove 23.

[0061] Therefore, the single-side sliding door body 100 has almost no gap between the leading edge of the membrane member 31a and the bottom surface of the vertical groove 23. Furthermore, as shown in FIG. 5, the trailing edge seal member 33 sandwiched between the trailing edge end face 3a of the central mullion 3 and the abutment surface 16a of the abutment portion 16 stretches vertically and horizontally, reducing the gap between the bottom surface of the abutment portion 16 and the upper support surface 4. This reduces the gap the closer the membrane member 31a is positioned to the central mullion. Furthermore, if the bottom end of the abutment portion 16 is positioned lower than the bottom end of the sliding door body 10, the gap can be further reduced. Therefore, the single-side sliding door body 100 of this embodiment can further improve sound insulation.

[0062] Figure 10 is an explanatory diagram of the sliding door body 10 of the single sliding door body 100 of this embodiment when it has a ventilation opening 19. Figure 10(A) is a view taken along the arrow AA in Figure 2 showing only the sliding door body 10, Figure 10(B) is an enlarged view of Figure 10(A) with the central portion omitted, and Figure 10(C) is a cross-sectional view taken along the line FF in Figure 10(A). When ventilation performance as well as sound insulation performance is required for the single sliding door body 100 of this embodiment, it is preferable to use a sliding door body 10 having ventilation through holes 18 and ventilation openings 19, as shown in Figure 10. The sliding door body 10 is preferably made of a wood material. This allows the single sliding door body 100 to be lightweight and also ensures sufficient strength as a door. However, the sliding door body 10 is not limited to this and may also be made of metal.

[0063] A decorative panel 10c is attached to the surface of the sliding door body 10. Inside the sliding door body 10 of this embodiment, a plurality of ventilation through holes 18 are formed, which are open at the upper and lower ends of the sliding door body 10. The ventilation through holes 18 extend vertically inside the sliding door body 10. The sliding door body 10 may be formed, for example, by stacking and gluing two plates having projections and recesses corresponding to the ventilation through-holes 18 together so that the projections come into contact with each other, or by any other suitable method.

[0064] The openings of the ventilation through holes 18 that can be provided at the upper and lower ends of the sliding door body 10 are ventilation openings 19. The lower ventilation opening 19 is an intake port 19a, and the upper ventilation opening 19 is an exhaust port 19b. In the ventilation opening 19, one of the intake port 19a and the exhaust port 19b opens to one side in the thickness direction Y, and the other of the intake port 19a and the exhaust port 19b opens to the other side in the thickness direction Y. The intake port 19a may be formed on the side surface 10a on the center of gravity side of the sliding door body 10, or on the side surface 10b on the door roller side.

[0065] Air intake port 19a extends in the opening / closing direction X above door rollers 17 and lower seal member 31. Air vent through-hole 18 extends upward from air intake port 19a, passes air taken in through air intake port 19a upward, and exhausts the air from exhaust port 19b that opens at the upper end of air vent through-hole 18. With this configuration, when the sliding door body 10 closes the opening 8, the single sliding door body 100 of this embodiment can ventilate between the two compartments while maintaining a high level of sound insulation performance.

[0066] With the above-described configuration, the single sliding door body 100 of the first embodiment has the roller 17 and the lower rail 5 at a position shifted to one side (the roller side) in the thickness direction Y from directly below the center of gravity 15 of the sliding door body 10. As a result, the sliding door body 10 tilts to the other side in the thickness direction Y (the center of gravity side) with the contact point 17a between the roller 17 and the lower rail 5 as a fulcrum, so that the upper end portion 12 of the sliding door body 10 can be brought into close contact with the inner wall surface 21a of the upper groove 21. Therefore, the upper end portion 12 of the sliding door body 10 is pressed against the upper groove 21 of the upper frame 1, improving the sound insulation of the upper part of the sliding door body 10.

[0067] In addition, the single sliding door body 100 of this embodiment has the door roller 17 positioned off to one side (door roller side) in the thickness direction Y from directly below the center of gravity 15 of the sliding door main body 10, thereby allowing the lower sealing member 31 to be positioned on the other side (center of gravity side) in the thickness direction Y. This allows the sliding door body 10 to tilt towards the center of gravity, thereby pressing the lower seal member 31 against the upper supporting surface 4, thereby further improving the sound insulation of the single sliding door body 100 of this embodiment.

[0068] (Second embodiment) FIG. 11 is a view of the single sliding door body 100 of the second embodiment as seen from the arrow BB in FIG. The single-side sliding door body 100 of the second embodiment is characterized in that the upper surface of the upper end portion 12 of the sliding door body 10 is flat, the upper end portion 12 does not have a door neck 12a or door shoulder 12b, and has only one central mullion 3. The upper groove 21 of the second embodiment receives the upper end portion 12 of the sliding door body 10 across the entire area in the thickness direction Y, and guides the upper end portion 12 in the opening and closing direction X. Furthermore, the width of the vertical groove 23 in the thickness direction Y of the second embodiment is set larger than the width of the upper groove 21 in the thickness direction Y by an amount sufficient to ensure installation space for the door-edge seal member 32.

[0069] In this embodiment, in the thickness direction Y, the side where the mullion 3 is located when viewed from the sliding door body 10 is called the "moulder side," and the opposite side is called the "anti-moulder side." Even if there is no door neck 12a, if there is only one central mullion 3, the central mullion side becomes the "center of gravity side" or "other side," and the opposite side (opposite the central mullion side) becomes the "door roller side" or "one side." The door roller 17 and lower rail 5 of this embodiment are located in a position shifted from directly below the center of gravity 15 of the sliding door body 10 to the opposite side to the central mullion in the thickness direction Y of the sliding door body 10. The sliding door body 10 of the second embodiment tilts toward the central mullion side (left side in Figure 11). Other configurations and effects of the single sliding door body 100 of this embodiment are the same as those of the first embodiment.

[0070] (Third embodiment) Figure 12 is a view taken along the arrow DD in Figure 1 when the sliding door main body 10 in the single sliding door body 100 of the third embodiment is closed, and Figure 13 is a view taken along the arrow EE in Figure 1 when the sliding door main body 10 in the single sliding door body 100 of the third embodiment is closed. The single sliding door body 100 of the third embodiment is a roller-type single sliding door. The single sliding door is a single sliding door that has a door pocket 6. The single sliding door body 100 of this embodiment has two mullions 3. The two mullions 3 are fixed to both sides of the door pocket 6 in the thickness direction Y. The wall body 9a of this embodiment may be one of the side surfaces of the door pocket 6 that extends parallel to the wall 9. Furthermore, the trailing edge vertical frame 29 of this embodiment may be a wall surface that forms the side surface of the door pocket 6 on the trailing edge.

[0071] The sliding door body 10 of the single-side sliding door body 100 of the third embodiment has a door neck 12a at the upper end 12. In this case, the direction in the thickness direction Y where the door neck 12a is located (hereinafter referred to as the door neck side) is referred to as the "center of gravity side," i.e., the "other side" in the thickness direction Y, and the direction in the thickness direction Y where the door shoulder 12b is located (hereinafter referred to as the door shoulder side) is referred to as the "door roller side," i.e., the "one side." In other words, even if there are two mullions 3, as long as the sliding door body 10 has a door neck 12a, the sliding door body 10 will always tilt so that the upper edge of the door neck 12a is always pressed against the inner wall surface 21a of the upper groove 21. The door roller 17 is provided on the door shoulder side, and the lower seal member 31 is provided on the door neck side. The abutment portion 16 extends from the door tail end of the sliding door body 10 toward the door neck side, and a door tail seal member 33 is provided on the door tail side end surface 3a of the door tail side of the door neck side mullion 3. With this configuration, even if the single sliding door body 100 of this embodiment has two middle mullions 3, the sliding door body 10 is in close contact with the middle mullions 3 on the door neck side, the inner wall surface 23a on the door neck side of the vertical groove 23, and the inner wall surface 23a on the door neck side of the upper groove 21, so the two compartments can be closed off in a soundproof manner. Other configurations and effects of the single sliding door body 100 of this embodiment are the same as those of the first embodiment.

[0072] (Fourth embodiment) FIG. 14 is a view of the single sliding door body 100 of the fourth embodiment as seen from the CC arrow in FIG. The single-side sliding door body 100 of the fourth embodiment does not have a door neck 12a on the sliding door body 10 as in the second embodiment, but has two middle mullions 3 as in the third embodiment. In such cases, either side in the thickness direction Y may be set as the center of gravity side (the other side). In the single-side sliding door body 100 of this embodiment, a door trailing edge seal member 33 is attached to the door trailing edge side end face 3a of the middle mullion 3 on the side determined as the center of gravity side, and the abutment portion 16 protrudes toward the center of gravity. A lower seal member 31 is attached to the bottom end portion 11 of the sliding door body 10, and a door roller 17 and a lower rail 5 are attached to the opposite side (the door roller side, one side in the thickness direction Y).

[0073] With this configuration, the single sliding door body 100 of this embodiment has a flat upper end 12 of the sliding door body 10 without a door neck 12a, and even when there are two middle mullions 3, it can soundproof and close off two compartments. Other configurations and effects of the single sliding door body 100 of this embodiment are the same as those of the second or third embodiment.

[0074] According to the present invention described above, the door roller 17 and the lower rail 5 are located at a position shifted to one side (door roller side) in the thickness direction Y from directly below the center of gravity 15 of the sliding door body 10. As a result, the sliding door body 10 tilts to the other side in the thickness direction Y (toward the center of gravity) with the contact point 17a between the door roller 17 and the lower rail 5 as a fulcrum, so that the upper end portion 12 of the sliding door body 10 can be brought into close contact with the inner wall surface 21a of the upper groove 21. Therefore, the upper end portion 12 of the sliding door body 10 is pressed against the upper groove 21 of the upper frame 1, so that the sound insulation of the upper part of the sliding door body 10 can be improved.

[0075] Furthermore, the single sliding door body 100 of the present invention has the door roller 17 positioned to one side (door roller side) in the thickness direction Y from directly below the center of gravity 15 of the sliding door main body 10, so that the lower sealing member 31 can be positioned on the other side (center of gravity side) in the thickness direction Y. This allows the sliding door body 10 to tilt towards the center of gravity, thereby pressing the lower seal member 31 against the upper supporting surface 4, thereby further improving the sound insulation of the single sliding door body 100 of the present invention.

[0076] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0077] 100 Roller-type single sliding door body, 1 Upper frame, 1a Door end side end of upper frame, 1b Lower surface of upper frame, 1c Door tail end, 2. Vertical frame at the front of the door, 2a End face of the door end vertical frame on the opening side, 2b Upper end of the vertical frame at the door end, 3 Middle mullion, 3a End face of middle mullion on the tail end side, 4 Support top surface (top surface of lower frame, floor surface), 4a lower frame, 4b floor, 5 Lower rail (V-shaped rail), 5a groove, 6 door pockets, 8 opening, 8a upper end of opening, 8b Door end of opening, 8c End of the opening on the tail side of the door, 8d Lower end of opening; 9 wall, 9a wall, 10 sliding door body, 10a center of gravity side surface, 10b Door roller side, 10c veneer, 11 Lower end of the sliding door body, 12 Upper end of the sliding door body; 12a Door neck, 12b Door shoulder, 12c: the end surface of the upper end of the sliding door body on the middle mullion side; 13 Door front, 13a Handle, 13b Key, 13c The end surface of the center mullion side of the door tip of the sliding door body, 14 Tojiribe, 15 Center of gravity of sliding door body, 15a: A vertical line passing through the center of gravity of the sliding door body; 16 contact part, 16a contact surface, 17 Door roller (V-type door roller), 17a Contact point between door roller and lower rail, 17b Door roller shaft center, 18 Ventilation holes, 19 ventilation openings, 19a Intake port, 19b Exhaust port, 20 frame, 21 upper groove, 21a inner wall surface of the upper groove, 21b Upper groove end on the door tip side, 22 Resin rail components, 23 longitudinal groove, 23a inner wall surface of longitudinal groove, 28 Stopper, 29 Door end side vertical frame, 30 sealing member, 31 lower seal member, 31a membrane member, 32 door leading seal member, 33 door trailing seal member, 40 door rollers, 40a tsuba, 41 Door roller rail, 42 peripheral surface, 43 Vertical plane of flange or door roller rail, X Open / close direction, Y: Thickness direction of the sliding door body

Claims

1. A roller-type single sliding door body that opens and closes an opening provided in a wall that separates compartments in a building, and closes these compartments in a sound-insulating manner, A sliding door body having a door roller at a lower end portion that can roll in an opening and closing direction parallel to the wall; a lower rail that is installed on a support upper surface that extends horizontally at the height of a lower end of the opening, extends in the opening / closing direction, and guides the door roller; an upper frame having an upper groove for receiving an upper end of the sliding door body and guiding it in the opening / closing direction, the upper frame extending in the opening / closing direction along the upper end of the opening and the wall; a lower sealing member that seals the gap between the lower end of the sliding door body and the support upper surface, The door roller and the lower rail are positioned offset to one side in the thickness direction of the sliding door body from directly below the center of gravity of the sliding door body, The sliding door body tilts in the thickness direction toward the other side in the thickness direction with the contact point between the roller and the lower rail as a fulcrum, thereby bringing the upper end of the sliding door body into close contact with the inner wall surface on the other side of the upper groove.

2. 2. The roller-type single sliding door body according to claim 1, wherein the lower sealing member is located on the other side of the roller at the lower end of the sliding door body, extends downward from the lower end of the sliding door body, and is pressed against the upper support surface when the sliding door body tilts toward the other side and a distance from the lower end of the sliding door body to the upper support surface decreases.

3. The door roller is a V-type door roller, The roller-type single sliding door body according to claim 1, wherein the lower rail is a V-shaped rail.

4. A door-end vertical frame is provided at the door-end end of the opening, The door-front vertical frame has a vertical groove into which the door front portion of the sliding door main body can enter when the opening is closed, the longitudinal groove has a width in the thickness direction greater than that of the upper groove; 2. The roller-type single sliding door body according to claim 1, further comprising a pair of door edge seal members that seal a pair of gaps surrounded by both side surfaces in the thickness direction of the sliding door body when closed, a lower surface of the upper frame, a pair of inner wall surfaces extending in the height direction at both ends of the vertical groove in the thickness direction, and the upper support surface.

5. 5. The roller-type single sliding door body according to claim 4, wherein, assuming that the sliding door body is not tilted, a pair of gaps surrounded by both side surfaces in the thickness direction of the closed sliding door body, the lower surface of the upper frame, the inner wall surfaces of the vertical grooves, and the upper support surface are larger on the other side than on the one side in the thickness direction.

6. The sliding door body has a door neck that protrudes upward at its upper end, The roller-type single sliding door body according to claim 1, wherein a direction in the thickness direction of the roller-type single sliding door body where the door neck is located is defined as the other side.

7. The door has only one vertical mullion erected at the end of the door trailing edge of the opening, The sliding door body has a door neck protruding upward at its upper end, and the door neck faces the mullion side where the mullion is located in the thickness direction, The roller-type single sliding door body according to claim 1, wherein the center mullion side of the roller-type single sliding door body is the other side.

8. A mullion is provided at the end of the door trailing edge of the opening, the sliding door body has a contact portion that extends in the height direction along its door trailing edge, protrudes toward the wall, and faces the door trailing edge end surface of the middle mullion when the sliding door body is closed; The roller-type single sliding door body according to claim 1, further comprising a trailing edge seal member provided on the trailing edge end surface of the middle mullion to close a gap between the trailing edge end surface of the middle mullion and the abutment portion when the sliding door body is closed.

9. 2. The roller-type single sliding door body according to claim 1, wherein the sliding door body has a ventilation through-hole formed therein and extending in the vertical direction, and ventilation openings for the ventilation through-hole provided at an upper end of one side surface facing the inside of the compartment and at a lower end of the other side surface.

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