Sash

Abstract

This sash includes a sliding panel stile that can be moved to open and close a sliding panel, and a window frame (14) surrounding the sliding panel stile. The sash is used for single or double sliding windows. In the sliding panel stile, an airtight material is provided over the entire circumference of one surface in the thickness direction of the sliding panel stile in a frame body extending in each of four directions up, down, left, and right. A plurality of door rollers (30, 31) for allowing the sliding panel stile to move to the right and left are spaced apart in the left-right direction at the lower part of the sliding panel stile. A plurality of door roller rails (40, 41) corresponding to the door rollers (30, 31) are formed in the opening of the window frame (14). On the door end side of each door roller rail (40, 41), a push-in part inclined in a linear or curved form with respect to the left-right direction is provided so as to guide the sliding panel stile to one side in the thickness direction.

Description

sash

[0001] The present disclosure relates to a sash.

[0002] Conventionally, a single-sliding window or a double-sliding window is composed of a sash and a translucent material such as glass attached to the sash. The sash has a shoji frame that moves left and right to open and close the window, and a window frame surrounding the shoji frame. The window frame is attached to an opening with a rectangular cross section in the exterior wall of a building.

[0003] Patent Document 1 describes a sliding window in which a pair of guide rails that guide a pair of shoji screens in the direction of movement are provided above and below the window frame, and the distance between the pair of guide rails at a position corresponding to the joining part of the pair of shoji screens when closed is shorter than the distance between the pair of guide rails at a position away from the joining part. This is said to make it easier to ensure the airtightness of the building when the pair of shoji screens are closed.

[0004] JP 2019-131983 A

[0005] In single-sliding or double-sliding windows, it is possible to increase airtightness when closed by installing airtight material around the entire side of the shoji frame. However, in this case, the airtight material comes into contact with the window frame and other opposing shoji screens even during opening and closing operations, causing friction of the airtight material, which increases the force required for opening and closing operations. On the other hand, if the airtight material is prevented from coming into contact with the opposing member facing the airtight material in order to reduce the force required for opening and closing the window, the airtightness when closed will decrease.

[0006] The configuration described in Patent Document 1 may be able to increase the airtightness at the joint when the window is closed, but there is room for improvement in terms of increasing the airtightness around the entire periphery of the shoji screen, including the edge of the door.

[0007] An object of the present disclosure is to realize a sash that reduces the force required to open and close a window and that provides high airtightness when closed.

[0008] The sash disclosed herein comprises a shoji frame that can be moved to open and close, and a window frame that surrounds the shoji frame, and is used for single-sliding or double-sliding windows; the shoji frame is a frame that extends in each of the four directions (top, bottom, left, and right), and an airtight material is provided around the entire circumference of one side of the shoji frame in the thickness direction; a plurality of door rollers that allow the shoji frame to move left and right are arranged at intervals in the left and right direction below the shoji frame; a plurality of door roller rails corresponding to each of the plurality of door rollers are formed in the opening of the window frame; and the door tip side of each of the plurality of door roller rails has a push-in portion that is inclined linearly or curved in the left and right direction so as to guide the shoji frame to one side in the thickness direction.

[0009] According to the sash of the present disclosure, when the window is closed, the airtight material is placed facing the window frame or a component fixed to the window frame, or another shoji frame, over almost the entire circumference in the thickness direction of the shoji frame, so the shoji frame moves to one side in the thickness direction, allowing the airtight material to come into contact with the airtight opposing component over almost the entire circumference. This increases airtightness when the window is closed. On the other hand, when the shoji frame moves to open the window, the airtight material can be moved away from the airtight material opposing component. This reduces the force required to open and close the window, while increasing airtightness when the window is closed.

[0010] 11A is a perspective view of a single sliding window with a translucent glass member attached to a sash according to an embodiment, viewed from the indoor side with some parts omitted. 11B is a schematic cross-sectional view of the inner shoji shown in FIG. 1. 11C is a cross-sectional view of A-A in FIG. 2. 11D is an enlarged view of part B showing the single sliding window of FIG. 1 with a cremone lock attached. 11E is a perspective view of the inner shoji and the glass attached to it, omitting it from FIG. 1. 11F is a cross-sectional view of the inner shoji, viewed from the outdoor side with the airtight material omitted. 11G is a cross-sectional view of the inner shoji, viewed from the outdoor side with the airtight material omitted. 11H is a cross-sectional view of the inner shoji, viewed from the indoor side with the airtight material omitted. 11H ... 11A is a view of the engagement pin and guide portion of FIG. 11A as seen from the outdoor side. It is a perspective view of part J of FIG. 1 as seen from the indoor side. It is a schematic cross-sectional view taken along line K-K of FIG. 12. It is a cross-sectional view taken along line L-L of FIG. 13. It is a cross-sectional view taken along line M-M of FIG. 13. It is an enlarged view of the right half of FIG. 14A. It is an enlarged view of the right half of FIG. 14B. It is a view corresponding to FIG. 12 in another embodiment. It is a schematic cross-sectional view taken along line N-N of FIG. 16. It is a schematic cross-sectional view taken along line P-P of FIG. 17. It is a cross-sectional view of an inner shoji screen and an upper part of a window frame in another embodiment. It is a cross-sectional view of an inner shoji screen and an upper part of a window frame in another embodiment. It is a cross-sectional view of an inner shoji screen and an upper part of a window frame in another embodiment. It is a view corresponding to the right half of FIG. 9 in another embodiment. It is a view corresponding to the right half of FIG. 9 in another embodiment. It is a view corresponding to the right half of FIG. 9 in another embodiment. It is a perspective view of a door roller and a door roller rail as seen from the right side when the door roller is located at part Q of FIG. 22. Fig. 24 is a diagram showing the door roller and the door roller rail of Fig. 23 as viewed from above. Fig. 25 is a cross-sectional view of the door roller and the door roller rail in another example of the embodiment.

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The shapes, materials, and quantities described below are examples for illustrative purposes only and can be changed as appropriate depending on the specifications of the window including the sash.

[0012] Fig. 1 is a perspective view, with some parts omitted, of a single sliding window 10 in which a translucent glass 60 is attached to a sash 12 according to an embodiment, as viewed from the indoor side. Fig. 2 is a schematic cross-sectional view of the inner shoji screen 19 shown in Fig. 1. Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2. Fig. 4 is an enlarged view of part B showing the state in which a cremone lock has been attached to the single sliding window 10.

[0013] As shown in Figure 1, a single sliding window 10 is composed of a sash 12 and a sheet of glass 60 attached to the sash 12. The sash 12 includes a window frame 14 attached to the edge of an opening with a rectangular cross section in the exterior wall of a building (not shown), and a pair of shoji frames attached to the inside of the window frame 14: an inner shoji frame 21 on the indoor side and an outer shoji frame 22 on the outdoor side. In this specification, the front view of the single sliding window 10 is defined as the view from the indoor side to the outdoor side, and the left and right sides of the front view are defined as left and right, respectively.

[0014] The window frame 14 is a rectangular annular member when viewed from the front, and is, for example, a resin sash frame made of resin. The window frame 14 may also be a frame made of metal such as aluminum.

[0015] The window frame 14 is fixed along the inner periphery of the opening in the exterior wall of the building with nails or the like, but the fixing method is not limited thereto. The window frame 14 is composed of an upper frame body 15 and a lower frame body 16 that are along the upper side and the lower piece, respectively, and a left frame body 17 and a right frame body 18 that are along the left piece and the right piece, respectively.

[0016] The pair of shoji frames 21, 22 each have a rectangular frame shape when viewed from the front, and are configured so that a plate-shaped glass 60 can be attached to the inside of each. Each shoji frame 21, 22 is formed, for example, from resin, but may also be made of metal such as aluminum. Of each shoji frame 21, 22, the inner shoji frame 21 is movable left and right to open and close, and is movable left and right inside the window frame 14. On the other hand, the outer shoji frame 22 is a fixed shoji frame that is fixed so as to be fitted into the left half of the inside of the window frame 14.

[0017] The inner shoji frame 21 and the outer shoji frame 22 each have glass 60 attached to the inside, forming the inner shoji 19 and the outer shoji 20. The glass 60 may be single-pane glass or double-pane glass. The translucent member is not limited to glass, but may be a transparent or translucent plate-shaped resin member. In this example, the outer shoji 20 is fixed to the left side of the window frame 14, and the inner shoji 19 moves to the right to close the window. However, the outer shoji may be fixed to the right side of the window frame 14, and the inner shoji 19 may move to the left to close the window.

[0018] Each of the shoji frames 21, 22 is comprised of an upper frame body 23 and a lower frame body 24 extending in the direction of the upper and lower edges and the lower piece, respectively, and a left frame body 25 and a right frame body 26 extending in the direction of the left and right piece, respectively. To enable left-right movement of the inner shoji frame 21, two door rollers 30, 31 are attached to the lower end as shown in Figures 2 and 3.

[0019] As shown in Figure 2, the two door rollers 30, 31 are spaced apart in the left-right direction of the inner shoji frame 21. Figure 2 shows a glass unit 61, which includes glass and a glass holder provided around the glass, held in the inner shoji frame 21 via two glass receiving bases 62 on the left and right provided at the bottom end. Each door roller 30, 31 is provided directly below each glass receiving base 62, coinciding with the respective glass receiving bases 62 in the left-right direction and in the thickness direction of the inner shoji frame 21. This allows each door roller 30, 31 to appropriately absorb the load applied downward from each glass unit 61, thereby suppressing deformation of the lower frame body 24 of the inner shoji frame 21.

[0020] As shown in Figure 3, a frame-shaped plate portion 21a protrudes all around from the inner peripheral edge of the indoor end of the inner shoji frame 21. Although not shown, a sealing member made of an elastic material such as rubber may be provided around the entire periphery of the plate portion 21a between the plate portion 21a and the glass unit 61 to seal the gap between the plate portion 21a and the glass unit 61.

[0021] Additionally, at the lower end of the outdoor portion of the inner peripheral surface of the window frame 14, on the right side of the outer shoji screen 20, a plate-like or block-like movement restriction base 64 is fixed which is elongated in the left-right direction and has a length approximately equal to the length from the right end of the outer shoji screen 20 to the left side of the right frame body 18 of the window frame 14. The movement restriction base 64 is provided with legs 65 which extend downward on both ends, on the indoor and outdoor sides. This more reliably prevents the outer shoji screen 20 from moving left-right.

[0022] A cremone lever 66, as shown in Figure 4, is attached to the right frame 26, which is the door tip of the inner shoji stile 21. The cremone lever 66 is roughly L-shaped, similar to those used in general cremone locks. One end of the cremone lever 66 is attached to the vertical middle of the right frame 26. A rotation axis O1 is provided at one end of the cremone lever 66, which runs along the thickness direction of the inner shoji stile 21, and the cremone lever 66 is rotatable around the rotation axis O1. An engagement lever 67 is formed at a portion of the rotation axis O1 located inside the right frame 26, which protrudes diagonally upward when the cremone lever 66 is in the closed position, which is the position indicated by the solid line in Figure 4.

[0023] FIG. 5A is a perspective view of FIG. 1 , omitting the inner shoji screen and the glass attached to it. FIG. 5B is an enlarged perspective view of portion C in FIG. 5A . The tip of the engagement lever 67 shown in FIG. 4 engages with the vertically intermediate portion of the slide member 68 shown in FIGS. 5A and 5B . The slide member 68 is held by the right frame 26 ( FIG. 4 ) for vertical sliding movement and moves vertically in response to the vertical movement of the tip of the engagement lever 67. This allows the slide member 68 to slide vertically by rotating the cremone lever 66. The cremone lever 66 and the slide member 68 form a pulling mechanism 69. As described below, when the inner shoji screen 19 moves toward the door edge (right side in FIG. 1 ), which is the closing direction, the pulling mechanism 69, in conjunction with the operation of the cremone lever 66, moves the inner shoji frame 21 further toward the door edge and toward the outside, which is one side of the inner shoji frame 21 in the thickness direction. The pulling mechanism 69 will be described in detail later. As shown in Figures 5A and 5B, two door roller rails 40, 41 are provided on the upper surface of the lower frame body 16 of the window frame 14. The two door roller rails 40, 41 are separated into one on the outdoor side and one on the indoor side. Of the two door rollers 30, 31 provided on the inner shoji frame 21, the left door roller 30 runs along the outdoor door roller rail 40, and the right door roller 31 runs along the indoor door roller rail 41. The door rollers 30, 31 and the door roller rails 40, 41 will be explained in detail later.

[0024] Figure 6 is a perspective view of the inner shoji screen 19 viewed from the outside without the airtight material. Figures 7A, 7B, 7C, 7D, and 7E are a cross-sectional view taken along line D-D in Figure 1, an enlarged view of part E in Figure 6, a cross-sectional view taken along line F-F in Figure 1, a cross-sectional view taken along line G-G in Figure 1, and a cross-sectional view taken along line H-H in Figure 1, respectively.

[0025] As shown in Figures 6 and 7A, the inner shoji frame 21 has flange-shaped outer protrusions 27 and inner protrusions 28 that protrude continuously outward along the outer periphery at the upper end of the upper frame body 23, the lower end of the lower frame body 24, and the right end of the right frame body 26, on both the outdoor end and the indoor end.

[0026] 6, a groove 29 is formed around the entire outer periphery of the outer side surface, which is one surface in the thickness direction of the inner shoji frame 21 and includes the outdoor side surface of the outer protrusion 27. As a result, grooves 29 are formed around the entire periphery of the outdoor sides of the upper frame 23, lower frame 24, left frame 25, and right frame 26, following the rectangular outer periphery of the inner shoji frame 21. As shown in FIG. 7B, a portion of the groove 29 may open into the outer periphery of the inner shoji frame 21.

[0027] As shown in Figures 7A and 7C to 7E, a piece 50 made of an elastic material such as rubber is fitted into the groove 29 around the entire periphery, with a portion of it protruding to the outdoor side. The airtight material 50 may be a single piece of airtight material that is continuous around the entire periphery, or it may be four linear pieces of airtight material that are separated and arranged continuously around the entire periphery so as to follow the groove 29 on the four sides (top, bottom, left, and right). In this way, the airtight material 50 is provided around the entire periphery of the outdoor side of the inner shoji frame 21 on each of the frames 23, 24, 25, and 26 of the inner shoji frame 21.

[0028] As shown in Figure 1, when the inner shoji screen 19 is placed in the rightmost closed window position, as shown in Figure 7A, the right ends of the outer protrusion 27 and the inner protrusion 28 open into the inner peripheral side surface of the right frame body 18 of the window frame 14 and are inserted into the outer groove 70 and the inner groove 71, respectively, which are spaced apart in the thickness direction of the window frame 14. The protrusion of the airtight material 50, which is fitted into the groove 29 at the right end of the inner shoji screen 19 and extends in the vertical direction, faces and contacts the flat outdoor side surface of the outer groove 70 of the window frame 14 over its entire vertical length.

[0029] 7C, throughout the entire range of movement of the inner shoji screen 19 when opening and closing, the lower end of the inner protrusion 28 opens into the inner peripheral side surface of the lower frame body 16 of the window frame 14, and is inserted into the inner groove 73 of the outer grooves 72 and inner grooves 73 that are spaced apart in the thickness direction of the window frame 14. Furthermore, throughout the entire range of movement of the inner shoji screen 19 when opening and closing, the lower end of the outer protrusion 27 of the inner shoji screen 19 is inserted into the groove 74 formed by the outer groove 72 formed in the lower frame body 16 of the window frame 14 and the movement restriction base 64 or the indoor side surface of the outer shoji frame 22.

[0030] When the inner shoji screen 19 is placed in the closed window position, the protruding portion of the airtight material 50, which is fitted into the groove 29 at the lower end of the inner shoji screen 19 and extends in the left-right direction, contacts, over almost its entire length, the flat indoor side of the movement control base 64 fixed to the window frame 14 or the flat indoor side of the outer shoji screen frame 22.

[0031] On the other hand, when the inner shoji screen 19 is moved to the left side, opposite the door end, to open the window, the inner shoji screen 19 moves toward the interior due to the shape of the roller rails 40, 41 described below. As a result, the protruding portion of the airtight material 50 fitted into the groove 29 at the bottom end of the inner shoji screen 19 moves away from the movement restriction base 64 and the interior side of the outer shoji frame 22. This reduces the force required to open and close the inner shoji screen 19, improving the operability of the window.

[0032] As shown in Figure 7A, a cam portion 75 is formed on the indoor side of the lower end of the inner groove 71 formed in the right frame body 18 of the window frame 14, with a sloped surface that slopes toward the outdoor side toward the back end of the inner groove 71. At the right end of the inner protrusion 28 of the inner shoji frame 21, a protrusion 76 with an arc-shaped cross section is formed at the lower end of the indoor side, and this protrusion 76 engages with the sloped surface of the cam portion 75 when the window is closed. Therefore, the inner shoji screen 19 is moved toward the outdoor side when closed due to the shape of the roller rails 40, 41, but the inner shoji screen 19 also moves toward the outdoor side when it moves to the right just before closing, pushing the inner shoji screen 19 toward the outdoor side by the sloped surface.

[0033] 7D, when the inner shoji screen 19 is positioned in the closed position, the protruding portion of the airtight material 50, which is fitted into the groove 29 on the outdoor side of the left frame 25 of the inner shoji screen 19 and extends vertically, contacts the flat indoor side of the right end, including the right frame 26, of the outer shoji screen frame 22, over the entire vertical length. When the inner shoji screen 19 is moved to the left, which is the side opposite the door end, to open the window, the inner shoji screen 19 moves indoors as described above, and the protruding portion of the airtight material 50 fitted into the groove 29 on the left end of the inner shoji screen 19 moves away from the indoor side of the outer shoji screen frame 22. This also reduces the force required to open and close the inner shoji screen 19.

[0034] 7E, throughout the entire range of movement of the inner shoji screen 19 when opening and closing, the upper ends of the outer protrusion 27 and the inner protrusion 28 open onto the inner peripheral side surface of the upper frame body 15 of the window frame 14 and are inserted into outer grooves 77 and inner grooves 78, respectively, which are spaced apart in the thickness direction of the window frame 14. The outer grooves 77 and inner grooves 78 each correspond to upper guide rails. When the inner shoji screen 19 is positioned in the closed position of the window, the protrusion of the airtight material 50, which is fitted into the groove portion 29 at the upper end of the inner shoji screen 19 and extends in the left-right direction, contacts the flat outdoor side surface of the outer groove 77 of the upper frame body 15 of the window frame 14 over almost its entire length.

[0035] On the other hand, when the inner shoji screen 19 is moved to the left side, opposite the door end, to open the window, the inner shoji screen 19 moves toward the interior as described above, and the protruding portion of the airtight material 50 fitted into the groove 29 at the top end of the inner shoji screen 19 moves away from the exterior side of the outer groove 77 of the upper frame body 15 of the window frame 14. This also reduces the force required to open and close the inner shoji screen 19.

[0036] In this configuration, when the window is closed, the airtight material 50 faces the airtight material-facing member, which is the window frame 14 or a member fixed to the window frame 14, or another shoji frame, i.e., the outer shoji frame 22, over almost the entire circumference in the thickness direction of the inner shoji frame 21. At this time, by moving the inner shoji 19 to the closed position, the inner shoji frame 21 moves to one side in the thickness direction, so the airtight material 50 can be brought into contact with the airtight material-facing member over almost the entire circumference. This increases airtightness when the window is closed. On the other hand, when the inner shoji frame 21 moves to the left to open the window, the airtight material 50 can be moved away from the airtight material-facing member. This reduces the force required to open and close the window, while increasing airtightness when the window is closed.

[0037] The structure for moving the inner shoji screen 19 to the outside when the window is closed will be described in detail below. Fig. 8A is an enlarged perspective view showing the door roller units 32 and 33 taken out from Fig. 5B. Fig. 8B is an exploded perspective view of the door roller units 32 and 33.

[0038] As shown in Figures 8A and 8B, the door roller units 32, 33 include a fixed member 34 which is an approximately rectangular plate-like member fixed to the lower end surface of the inner shoji screen 19 by a bolt or the like, a movable support member 35 supported on the fixed member 34 so as to be able to move slightly, and door rollers 30, 31 supported on the movable support member 35 so as to be able to rotate.

[0039] A circular hole 34a is formed in the longitudinal center of the fixed member 34, penetrating vertically. The movable support member 35 has a substantially rectangular upper end plate portion 35a at the upper end and a lower member 35b. The lower member 35b has a substantially rectangular plate portion 35c superimposed and fixed below the upper end plate portion 35a, and a pair of substantially triangular vertical plate portions 35d protruding parallel to each other downward from both widthwise ends of the plate portion 35c. Axles are supported so as to span the pair of vertical plate portions 35d laterally, and the axles pass through the door rollers 30, 31, thereby rotatably supporting the door rollers 30, 31 on the movable support member 35. A groove 36 with a substantially arc-shaped cross section is formed on the outer periphery of the door rollers 30, 31 along the entire periphery. This groove 36 is fitted onto the upper side of door roller rails 40, 41, which have a substantially semicircular cross section, as described below. As a result, the door rollers 30, 31 can run while being guided by the door roller rails 40, 41. The cross-sectional shape of the grooves of the door rollers 30, 31 may be a concave cycloidal curve.

[0040] Furthermore, a stepped columnar portion 35e is formed in the longitudinal center of the upper surface of the plate portion 35c of the movable support member 35. The columnar portion 35e of the plate portion 35c protrudes upward from a groove having an inner surface with an arc-shaped cross section provided in the center of the upper end plate portion 35a. Cylindrical portions 35f are fixed to two positions on both longitudinal sides of the upper end plate portion 35a so as to protrude upward.

[0041] The small-diameter portion of the cylindrical portion 35e passes through the circular hole 34a formed in the fixed member 34 without rattle. Furthermore, the cylindrical portion 35f of the movable support member 35 is inserted into a pair of oval engagement holes 34b formed on either side of the circular hole 34a of the fixed member 34. Each engagement hole 34b is elongated along a circle centered on the central axis of the circular hole 34a. With the fixed member 34 fixed to the inner sash frame 21, the door rollers 30, 31 can rotate around an axis extending in the vertical direction, with the range of movement restricted by the engagement holes 34b, while running on the door roller rails 40, 41 (Fig. 7c).

[0042] Fig. 9 is a schematic diagram of door roller rails 40, 41 and door rollers 30, 31 for an inner shoji screen 19, viewed from above. Fig. 10 is an enlarged view of the right half of Fig. 9. As shown in Figs. 9 and 10, a pair of door roller rails 40, 41 are provided on the upper surface of the lower frame body 16, which is the opening of the window frame 14. As shown in Fig. 7C, the pair of door roller rails 40, 41 are integrally provided on the upper surface of a plate-shaped rail member 42 fixed to the upper surface of the lower frame body 16, and each has a substantially semicircular cross section that protrudes upward. For example, the rail member 42 is formed from resin or metal.

[0043] As shown in Figures 9 and 10, a pair of roller rails 40, 41 are provided at a distance from each other on the indoor and outdoor sides. The indoor roller rail 41 corresponds to the roller 31 located on the indoor side of the inner shoji frame 21. The outdoor roller rail 40 corresponds to the roller 30 located on the outdoor side of the inner shoji frame 21. In Figures 9 and 10, the dashed-dotted lines indicate the rectangular outline of the inner shoji frame 21 as viewed from above at multiple positions as the inner shoji frame 21 moves during opening and closing. The dashed-dotted rectangular portions with diagonal lines or open rectangular portions indicate the rollers 30, 31 corresponding to the inner shoji frame 21 at each position. As shown in Figures 9 and 10, the two rollers 30, 31 are provided at a distance from each other in the thickness direction of the inner shoji frame 21 at each position of the inner shoji frame 21.

[0044] Each door roller rail 40, 41 has a straight section 43, 44 extending in the left-right direction, an inclined section 45, 46 provided on the right side of the straight section 43, 44, which is the door leading side, and an auxiliary straight section 47, 48 provided to the right of the inclined section 45, 46. The straight sections 43, 44 of the pair of door roller rails 40, 41 are parallel to the left-right direction and are spaced a distance d (FIG. 10) apart in the thickness direction of the inner shoji frame 21. The left ends of the straight sections 43, 44 of the pair of door roller rails 40, 41 are at the same position in the left-right direction. As a result, the pair of door roller rails 40, 41 have straight sections 43, 44 that are parallel to each other and extend along the left-right direction on the left side, which is the side opposite the door leading side.

[0045] Each inclined portion 45, 46 is inclined in the left-right direction so as to guide the inner shoji frame 21 to the outside side, which is one side in the thickness direction of the inner shoji frame 21, and is a pushing portion for pushing the inner shoji frame 21 to the outside side.

[0046] Specifically, each inclined portion 45, 46 slopes in a curved manner toward the exterior toward the right. In the example shown in Fig. 10 , the inclined portions 45, 46 are roughly S-shaped, nearly straight, formed by smoothly connecting one end of two roughly arc-shaped curved portions, with the center of curvature located on the opposite side of each roller rail 40, 41. In Figs. 9 and 10 , the roller rails 40, 41 are simplified and shown as straight lines or curves. Alternatively, each inclined portion 45, 46 may have an inclined straight portion that slopes linearly toward the exterior toward the right, and both ends of the inclined straight portion may be smoothly connected to the straight portions 43, 44 and the auxiliary straight portions 47, 48 by roughly arc-shaped curves.

[0047] The inclined portion 46 of the indoor door roller rail 41 is positioned to the right of the inclined portion 45 of the outdoor door roller rail 40 by the left-right distance of the two door rollers 30, 31. The two inclined portions 45, 46 have the same shape when viewed from above.

[0048] The auxiliary straight sections 47, 48 are formed to prevent edges from forming at the right ends of the inclined sections 45, 46. The right ends of the auxiliary straight sections 47, 48 of the pair of door roller rails 40, 41 are at the same position in the left-right direction. The auxiliary straight sections 47, 48 are not portions on which the door rollers 30, 31 run, and may therefore be omitted. Note that the door rollers 30, 31 may also run on the auxiliary straight sections 47, 48.

[0049] Each roller rail 40, 41 is configured as described above. Therefore, when each roller 30, 31 is located at the right end of the straight section 43, 44, i.e., at positions A1 and A2 in Figures 9 and 10, the inner shoji screen 19 is pulled to the right side (the door edge) by the pulling distance shown in Figure 9 in the left-right direction by the pulling mechanism 69 (Figure 5A) described below, and the inner shoji screen 19 moves so as to be pushed to the outdoor side by the pushing distance shown in Figure 9. This, combined with the airtight material 50 provided around the entire periphery of the outdoor side, which is one surface in the thickness direction of the inner shoji screen frame 21, reduces the force required to open and close the inner shoji screen 19 and increases airtightness when closed.

[0050] In addition, the two left and right door rollers 30, 31 are spaced apart in the thickness direction of the inner shoji frame 21, and the two door roller rails 40, 41 have straight sections 43, 44 that are parallel to each other and extend in the left-right direction on the opposite side of the door edge. Therefore, unlike the configuration of another example shown in Figure 20 described below, where the two left and right door rollers 30, 31 are located at the same position in the thickness direction of the inner shoji frame 21 and the straight sections 43a, 44a on the opposite side of the door edge of each door roller rail 40a, 41a are located at the same position in the thickness direction of the inner shoji frame 21, the leftward movement range of the right door roller 31 is prevented from being limited to the right of the straight section 43a of the left door roller rail 40a. This makes it easier to increase the left-right movement range of the inner shoji frame 21 without increasing the left-right distance between the two left and right door rollers 30, 31. Therefore, the range of movement of the inner shoji screen 19 can be increased without locating the two left and right door rollers 30, 31 further outward in the left-right direction than the glass receiving base 62 shown in Figure 2. If the left and right door rollers 30, 31 are located further outward in the left-right direction than the glass receiving base 62 shown in Figure 2, if the bending strength of the lower end of the inner shoji screen frame 21 is low, the weight of the glass unit 61 may be applied to the lower end via the glass receiving base 62. In this case, the inner shoji screen frame 21 may be deformed so that it bends downward. In this embodiment, there is no need to increase the left-right distance between the door rollers 30, 31 as described above, so this kind of inconvenience can be prevented.

[0051] Fig. 11A is a perspective view showing the slide member 68, engagement pin 80, and guide portion 81 that constitute the pulling mechanism 69. Fig. 11B is a view of the engagement pin 80 and guide portion 81 as seen from above. Fig. 11C is a view of the engagement pin 80 and guide portion 81 as seen from outside.

[0052] As shown in Figures 4, 5A, and 5B, the pulling mechanism 69 includes the cremone lever 66 and slide member 68 provided on the inner screen 19, the engagement pin 80 shown in Figure 11A, and a guide portion 81. As described in Figures 4, 5A, and 5B, the slide member 68 can be slid up and down by rotating the cremone lever 66. As shown in Figures 5A and 5B, two engagement pins 80 are supported at the two upper and lower ends of the slide member 68, penetrating the slide member 68 in the left-right direction. Each engagement pin 80 has a flange 80a at the portion of the slide member 68 facing the inner screen 19, and a disc portion 80b at the tip of the cylindrical shaft that protrudes from the slide member 68 toward the window frame 14. The length of protrusion of each engagement pin 80 from the slide member 68 remains constant.

[0053] Two guide parts 81 are fixed to two positions spaced apart above and below on the inner peripheral part of the right frame body 18 of the window frame 14 so as to be engageable with each engagement pin 80. As shown in Figure 11A, the guide part 81 has a base plate 81a along a plane perpendicular to the thickness direction of the inner shoji frame 21, an outer plate part 81b connected to the right end of the base plate 81a and extending at a right angle to the outdoor side, and a curved guide plate 81c connected to the upper half of the left edge of the base plate 81a and extending to the outdoor side.

[0054] As shown in FIG. 11B , the guide plate 81c has a generally trapezoidal shape, narrower at the left end and wider at the right end, when viewed from above. As shown in FIG. 11C , the guide plate 81c has a curved plate portion 81d that curves from the bottom to the top toward the right when viewed from the outdoor side. The vertical plate portion 81e is connected to the upper end of the curved plate portion 81d and extends vertically. The vertical plate portion 81e is parallel to the outer plate portion 81b. The outdoor-side edge of the curved plate portion 81d is curved upward and toward the outdoor side. As shown in FIG. 11A , when the slide member 68 is positioned at its lowest position, and as viewed from above as shown in FIG. 11B , the indoor-side end of the outer peripheral surface of the shank of the engagement pin 80, indicated by the two-dot chain line, is approximately aligned with the lower end of the outdoor-side edge of the curved plate portion 81d. As shown in FIG. 11C , the engagement pin 80 is positioned below the curved plate portion 81d.

[0055] In this state, when the cremone lever 66 (FIG. 4) is rotated and the slide member 68 rises, the outer peripheral surface of the shaft of the engagement pin 80 engages with the outdoor edge of the curved plate portion 81d. As the slide member 68 further rises, the engagement pin 80 is pulled to the right and pushed toward the outdoor side. The outdoor push distance corresponding to the rightward pull distance corresponds to the push distance shown in FIG. 9 . The push distance can be calculated as the sum of the distance between the airtight material 50 and the opposing component, such as the window frame 14, in the thickness direction of the inner screen 19 and the thickness reduction caused by compressing and crushing the airtight material 50. At this time, the engagement pin 80 moves upward by the slide distance shown in FIG. 11C . As a result, the inner screen 19 also moves toward the outdoor side by the push distance while being pulled to the right, i.e., the closed position, according to the shape of the inclined portions 45, 46 (FIGS. 9 and 10) of each roller rail 40, 41. Furthermore, when the inner shoji screen 19 is positioned in the closed position, the outer peripheral edge of the disk portion 80b of the engagement pin 80 engages with the lower end of the vertical plate portion 81e of the guide portion 81. This converts the rotational force of the cremone lever 66 into a force that moves the inner shoji screen 19 to the closed position and closes the window completely. This makes it easy to close the inner shoji screen 19. Furthermore, the inner shoji screen 19 is locked in the closed position, and movement of the inner shoji screen 19 in the opening direction is prevented unless the cremone lever 66 is rotated in the opposite direction.

[0056] Figure 12 is a perspective view of part J in Figure 1 as seen from the indoor side. Figure 13 is a schematic cross-sectional view taken along line K-K in Figure 12. Figure 14A is a cross-sectional view taken along line L-L in Figure 13, and Figure 14B is a cross-sectional view taken along line M-M in Figure 13. Figure 15A is an enlarged view of the right half of Figure 14A, and Figure 15B is an enlarged view of the right half of Figure 14B.

[0057] As described above, the position of the inner shoji screen 19 in the thickness direction is different when it is open and when it is closed, and the outer protrusion 27 and inner protrusion 28 at the upper end of the inner shoji frame 21 are respectively positioned in the outer groove 77 and inner groove 78 of the window frame 14. For this reason, a gap is formed in the thickness direction of the inner shoji screen 19 between each of the protrusions 27, 28 and the corresponding grooves 77, 78. If this gap becomes large, it will cause the inner shoji screen 19 to rattle.

[0058] In this example, in order to suppress such rattle and allow the inner shoji screen 19 to move outdoors just before the window is closed, as shown in Figures 12 and 13, protrusions 90, 91 are formed on both thickness-wise side surfaces of the inner protrusion 28 at two positions spaced apart in the vertical and horizontal directions from the portion located inside the corresponding inner groove 78. These protrusions 90, 91 partially protrude in the horizontal direction toward the side surfaces of the inner groove 78. As shown in Figures 14A, 14B, 15A, and 15B, the cross-sectional shape of each protrusion 90, 91 when cut horizontally is approximately semicircular.

[0059] As shown in the left portions of Figures 14A and 14B, when the inner shoji screen 19 is in the open position, each protrusion 90, 91 can be in contact with or closely facing the side of the inner groove 78. This reduces rattle at the upper end of the inner shoji screen 19. Also, in this state, a large gap is formed between the inner groove 78 and positions on both thickness-wise sides of the inner protrusion 28 of the inner shoji screen 19 that are spaced left and right from the protrusions 90, 91. This reduces the friction between the inner groove 78 and the inner protrusion 28 when the inner shoji screen 19 is opened or closed, thereby reducing the force required to open and close the inner shoji screen 19.

[0060] 13, 14A, and 14B, and as shown in the right portions thereof and in Figures 15A and 15B, the upper frame body 15 of the window frame 14 is formed with two inclined grooves 92 and 93 on the left and right into which the protrusions 90 and 91 on the outdoor side of the inner shoji screen 19 fit, so as to allow the inner shoji screen 19 to move outdoors when the inner shoji screen 19 is in the closed position, and inclined protrusions 94 and 95 located opposite the inclined grooves 92 and 93 on the indoor side and onto which the protrusions 90 and 91 on the indoor side of the inner shoji screen 19 ride. The inclined grooves 92 and 93 and the inclined protrusions 94 and 95 each have an inclined surface that slopes outdoors toward the right. When the lower rollers 30, 31 are guided by the inclined portions 45, 46 (FIGS. 9 and 10) so that the inner shoji screen 19 moves to the closed position, the outdoor-side protrusions 90, 91 move along the inclined surfaces of the inclined grooves 92, 93 to the innermost parts of the inclined grooves 92, 93. Also, the indoor-side protrusions 90, 91 move along the inclined surfaces of the inclined protrusions 94, 95 to the vicinity of the tops of the inclined protrusions 94, 95. This prevents rattling at the upper end of the inner shoji screen 19 when closed, and also allows the upper end of the inner shoji screen 19 to move outdoors when closed, making it easier to maintain the inner shoji screen 19 upright.

[0061] In addition, the protrusions 90, 91 formed on the inner projection 28 are spaced apart in the left-right and up-down directions, which more stably suppresses rattle of the inner shoji screen 19. Also, even if the right-side protrusion 91 moves significantly to the left in the opening direction, the right-side indoor protrusion 91 can be prevented from interfering with the inclined protrusion 94 that climbs up onto the left-side protrusion 90 of the window frame 14.

[0062] In the above configuration, an airtight material 50 is provided on the outdoor side of the outer protrusion 27 of the inner shoji screen 19, but another airtight material may be provided on the outer peripheral edge of the outdoor side of the inner protrusion 28 of the inner shoji screen 19, and the airtight material may be pressed against the side of the inner groove 78 of the window frame 14 when the window is closed.

[0063] Fig. 16 is a view corresponding to Fig. 12 in another example of the embodiment. Fig. 17 is a schematic cross-sectional view taken along line N-N in Fig. 16. Fig. 18 is a schematic cross-sectional view taken along line P-P in Fig. 17.

[0064] 1 to 15, in this example, as shown in Figures 16 and 17, on both thickness-wise side surfaces of the inner protrusion 28, protrusions 90a, 91a are formed at the same vertical position on the portion located inside the corresponding inner groove 78, but at two positions spaced apart in the horizontal direction, so as to partially protrude toward the side surfaces of the inner groove 78. In Figure 16, the protrusions 90a, 91a are indicated by hatched areas. As shown in Figure 16, in this example, the left and right protrusions 90a, 91a are provided near both left and right edges of the upper end of the inner shoji screen 19 when the inner shoji screen 19 is in the closed position.

[0065] 18, in the upper frame body 15 of the window frame 14, two inclined grooves 92a, 93a on the left and right into which the protrusions 90a, 91a on the outdoor side of the inner shoji screen 19 fit, and inclined protrusions 94a, 95a, which are located opposite the inclined grooves 92a, 93a on the indoor side and onto which the protrusions 90a, 91a on the indoor side of the inner shoji screen 19 ride, are formed so as to allow the inner shoji screen 19 to move outdoors when the inner shoji screen 19 is in the closed position. In this example, the inclined grooves 92a, 93a and the inclined protrusions 94a, 95a are formed at a greater distance in the left-right direction than in the configuration shown in FIG. 15, so as to face the protrusions 90a, 91a when closed. Therefore, even if the inner shoji screen 19 moves significantly from the closed position to the left in the opening direction, the right indoor protrusion 91a can be prevented from interfering with the inclined protrusion 94a that is used to ride up the left protrusion 90a, without causing the left protrusion 90a and the right protrusion 91a to have different vertical positions.

[0066] In this example, unlike the configuration shown in Figures 12 to 15B, there is no need to make the left-side protrusion 90a and the right-side protrusion 91a different in vertical position, so it is possible to reduce the vertical length of each of the protrusions 27, 28 of the inner shoji screen 19 and the upper frame body 15 of the window frame 14. The other configurations and functions are the same as those of the configurations shown in Figures 1 to 15B.

[0067] The arrangement of the protrusions 90, 91, 90a, and 91a of the inner shoji screen 19 is not limited to the configurations of the above examples, and may be, for example, the configurations of the examples shown in Figures 19A, 19B, and 19C. Figures 19A, 19B, and 19C are cross-sectional views of the upper part of the inner shoji screen 19 and the window frame 14 in three examples of another embodiment.

[0068] 16 to 18, the configuration shown in Figure 19A has protrusions 97, 98 formed on the outdoor side of inner protrusion 28 and the indoor side of outer protrusion 27. Furthermore, in the upper frame body 15 of the window frame 14, an inclined recessed groove 99 is formed in the inner groove 78 at a position corresponding to the protrusion 97 when closed, and an inclined protrusion 100 is formed in the outer groove 77 at a position corresponding to the protrusion 98 when closed.

[0069] In the configuration shown in Figure 19B, unlike the configurations in Figures 16 to 18, the inner protrusion 28 and the inner groove do not have protrusions, inclined grooves, and inclined protrusions, respectively. Instead, the outer protrusion 27 and the outer groove 77 are provided with protrusions 90a, 91a, inclined grooves 92a, 93a, and inclined protrusions 94a, 95a, respectively.

[0070] 16 to 18, the configuration shown in Figure 19C has protrusions 98, 97 formed on the indoor side of inner protrusion 28 and the outdoor side of outer protrusion 27. Furthermore, in the upper frame body 15 of the window frame 14, an inclined protrusion 100 is formed at a position corresponding to the protrusion 98 of inner groove 78 when closed, and an inclined recessed groove 99 is formed at a position corresponding to the protrusion 97 of outer groove 77 when closed.

[0071] Figure 20 is a diagram corresponding to the right half of Figure 9 in another example of the embodiment. In the configuration of this example, unlike the configuration of Figure 9, the two left and right door rollers 30, 31 provided on the inner shoji frame 21 are arranged at the same position in the thickness direction of the inner shoji frame 21. In addition, the straight portions 43a, 44a provided on the left side, opposite the door end, of each door roller rail 40a, 41a provided on the window frame 14 are arranged at the same position in the thickness direction of the inner shoji frame 21, that is, on the same straight line along the left-right direction.

[0072] In addition, the inclined portions 45a, 46a and auxiliary straight portions 47a, 48a provided on each door roller rail 40a, 41a are each provided at the same position in the thickness direction of the inner shoji frame 21.

[0073] In the configuration of this example, the range of movement of the inner shoji screen 19 in the left-right direction is smaller than in the configuration shown in Figure 9, but there is no need to arrange the straight sections 43a, 44a of the two door roller rails 40a, 41a parallel to each other so that their positions in the thickness direction are different. This makes it easier to reduce the thickness of the window frame 14 and the inner shoji screen frame 21.

[0074] Furthermore, by positioning the two left and right door rollers 30, 31 laterally outboard of the glass support base 62 shown in Figure 2, it is possible to increase the range of movement of the inner shoji 19 in the left-right direction, but in that case, as mentioned above, the lower end of the inner shoji frame 21 becomes more likely to bend. Therefore, in this case, it is preferable to change the shape and structure of the lower end, such as by increasing the thickness of the cross-sectional shape of the lower end in the vertical direction, so as to increase the bending strength of the lower end of the inner shoji frame 21. In this example, the other configurations and functions are the same as those in Figures 1 to 15B.

[0075] Figure 21 is a diagram of another example of the embodiment, corresponding to the right half of Figure 9. In this example, an intermediate door roller rail 82 is provided between the indoor door roller rail 41 and the outdoor door roller rail 40 in the configuration of Figure 9. In addition, an intermediate door roller 37 is provided at the lower end of the inner shoji frame 21 between the two left and right door rollers 30, 31.

[0076] The intermediate door roller rail 82 has, on the side opposite the door end, a straight portion 83 that runs along the left-right direction and is parallel to the straight portions 43, 44 of the door roller rails 40, 41. The inclined portion 84 and auxiliary straight portion 85 of the intermediate door roller rail 82 are also parallel to the inclined portions 45, 46 and auxiliary straight portions 47, 48 of the indoor-side and outdoor-side door roller rails 40, 41, respectively.

[0077] The intermediate straight section 83 is located between the indoor and outdoor straight sections 43, 44. The intermediate inclined section 84 is located midway between the indoor and outdoor inclined sections 45, 46 in the thickness direction and left-right direction of the inner shoji frame 21. The intermediate auxiliary straight section 85 is also located midway between the indoor and outdoor auxiliary straight sections 47, 48 in the thickness direction and left-right direction of the inner shoji frame 21. In this configuration, the window frame 14 and inner shoji frame 21 may be thicker than the configuration shown in Figure 9, but the load applied from the glass unit 61 via the inner shoji frame 21 can be shared by the three door rollers 30, 31, and 37 and applied to the window frame 14, thereby reducing the load applied to each door roller 30, 31, and 37. This improves the durability of each door roller 30, 31, and 37. In this example, other configurations and operations are similar to those of the configurations in FIGS. 1 to 15B.

[0078] The number of rollers 30, 31, 38 provided on the inner shoji frame 21 and the number of roller rails 40, 41, 82 provided on the window frame 14 are not limited to two or three, but may be four or more each.

[0079] Fig. 22 is a view corresponding to the right half of Fig. 9 in another example of the embodiment. Fig. 23 is a perspective view of the door roller 30a and the door roller rail 40 as seen from the right side when the door roller 30a is located at part Q in Fig. 22. Fig. 24 is a view of the door roller 30a and the door roller rail 40 in Fig. 23 as seen from above. Fig. 25 is a cross-sectional view of the door rollers 30a, 31a and the door roller rails 40, 41.

[0080] In this example, the door rollers 30a, 31a are attached to the lower end of the inner door frame 21 (Figure 1) so that they cannot rotate around an axis in the vertical direction relative to the inner door frame 21. Specifically, two axles are fixed to the lower end of the inner door frame 21, spaced apart in the left-right and thickness directions so as to be parallel to the thickness direction of the inner door frame 21, and the door rollers 30a, 31a pass through each axle, so that each door roller 30a, 31a is rotatably supported on the inner door frame 21.

[0081] In this case, the overall shape of each door roller rail 40, 41 provided at the lower end of the window frame 14 is the same as the shape shown in Figures 9 and 10. On the other hand, as shown in Figures 22 to 24, even when the door rollers 30a, 31a are positioned on the inclined portions 45, 46 of the door roller rails 40, 41, it is necessary to prevent the ends of the door rollers 30a, 31a that have come out of the grooves 36a from riding up and coming off the door roller rails 40, 41. For this reason, in the configuration of this example, as shown in Figure 25, the cross-sectional shape of the grooves 36a of the door rollers 30a, 31a and the cross-sectional shape of the upper end of the door roller rails 40, 41 are each semicircular, and the radius of the semicircle of the groove 36a is larger than the radius of the semicircle of the upper end of the door roller rails 40, 41. The relationship between the grooves 36a of the door rollers 30a, 31a and the door roller rails 40, 41 is not limited to the relationship shown in Figure 25, and various structures can be adopted as long as the ends of the grooves of the door rollers 30a, 31a do not ride up on the door roller rails 40, 41 and the inclination of the door rollers 30a, 31a relative to the door roller rails 40, 41 can be tolerated.

[0082] In the above embodiment, the case where the inner shoji screen 19 is movable has been described, but the configuration of the present disclosure may also be applied to a configuration where the outer shoji screen 20 is movable. In this case, an airtight material 50 is provided around the entire periphery of the interior side, which is one side in the thickness direction of the outer shoji screen frame. In addition, the door end side of each of the multiple door roller rails 40, 41 is configured to have a push-in portion that is inclined linearly or curvedly in the left-right direction so as to guide the outer shoji screen frame toward the interior side.

[0083] Furthermore, in the above embodiment, the configuration of the present disclosure was described as being applied to a sash used in a single-sliding window, but the configuration of the present disclosure may also be applied to a sash used in a double-sliding window.

[0084] In this case, for example, to allow the outer shoji screen to move, a linear roller rail extending left and right can be provided on the upper surface of the lower end of the window frame, similar to the structure of a typical sliding window, and a roller attached to the lower end of the outer shoji screen can move left and right along the roller rail. In this case, the airtight material attached to the inner shoji screen or outer shoji screen is brought into contact with the side of the mating outer shoji screen or inner shoji screen and the side of the window frame or a member fixed to the window frame over almost the entire circumference when the window is closed. In this case, a crescent lock with a crescent receiver and crescent can be provided between the door-end end of the outer shoji screen and the vertical frame of the window frame, or between the vertically extending frame where the outer shoji screen and inner shoji screen meet, so that the outer shoji screen is locked in the closed position.

[0085] The present disclosure is further described by the following embodiments. Configuration 1: A sash for use in a single sliding window or double sliding window, comprising a shoji frame that can move to open and close the window, and a window frame surrounding the shoji frame, wherein the shoji frame has a frame body extending in each of the four directions (top, bottom, left, and right), and an airtight material is provided around the entire periphery of one side in the thickness direction of the shoji frame, and a plurality of door rollers that allow the shoji frame to move left and right are arranged at intervals in the left and right direction below the shoji frame, and a plurality of door roller rails corresponding to each of the plurality of door rollers are formed in the opening of the window frame 14, and a door tip side of each of the plurality of door roller rails has a push-in portion that is inclined linearly or curvedly with respect to the left and right direction so as to guide the shoji frame to one side in the thickness direction. Configuration 2: The sash according to Configuration 1, wherein the plurality of door rollers are spaced apart in the thickness direction, and the plurality of door roller rails have straight portions that are parallel to each other on the side opposite the door leading edge and that extend along the left-right direction.Configuration 3: The sash according to Configuration 1 or 2, wherein the shoji frame includes a pulling mechanism that moves the shoji frame toward the door leading edge and to one side in the thickness direction in conjunction with the operation of a lever when each of the plurality of door rollers moves to the pushing portion.Configuration 4: The sash according to any one of Configurations 1 to 3, wherein an upper guide rail that extends along the left-right direction is provided at an upper portion of the opening, and a portion of the upper portion of the shoji frame that is positioned inside the upper guide rail has a protrusion that is partially provided in the left-right direction and protrudes toward a side surface of the upper guide rail.

[0086] 10 Single sliding window, 12 Sash, 14 Window frame, 15 Upper frame body, 16 Lower frame body, 17 Left frame body, 18 Right frame body, 19 Inner shoji screen, 20 Outer shoji screen, 21 Inner shoji frame, 22 Outer shoji frame, 23 Upper frame body, 24 Lower frame body, 25 Left frame body, 26 Right frame body, 27 External protrusion, 28 Internal protrusion, 29 Groove portion, 30, 31 Door roller, 32, 33 Door roller unit, 34 Fixing member, 35 Movable support member, 36 Groove, 37 Door roller, 40, 41 Door roller rail, 42 Rail member, 43, 44 Straight portion, 45, 46 Inclined portion, 47, 48 Auxiliary straight portion, 50 Airtight material, 50 Airtight material, 60 Glass, 61 Glass unit, 62 Glass receiving base, 64: Movement control base, 65: Leg, 66: Cremon lever, 67: Engagement lever, 68: Slide member, 69: Pulling mechanism, 70, 72: Outer groove, 71, 73: Inner groove, 74: Groove portion, 75: Cam portion, 76: Protrusion, 77: Outer groove, 78: Inner groove, 80: Engagement pin, 81: Guide portion, 82: Door roller rail, 83: Straight portion, 84: Inclined portion, 85: Auxiliary straight portion, 90, 91: Protrusion, 92, 93: Inclined groove, 94, 95: Inclined protrusion, 97, 98: Protrusion, 99: Inclined groove, 100: Inclined protrusion.

Claims

1. A sash for use in a single-sliding window or a double-sliding window, comprising a sliding screen frame that can be moved to open and close, and a window frame surrounding the sliding screen frame, wherein the sliding screen frame has a frame extending in each of the four directions (top, bottom, left, and right) and an airtight material is provided around the entire circumference of one side of the frame in the thickness direction, a plurality of rollers that enable the frame to move left and right are arranged at intervals in the left and right direction at the bottom of the frame, a plurality of rollers that correspond to each of the plurality of rollers are formed in the opening of the window frame, and the door end side of each of the plurality of roller rails has a push-in portion that is inclined in a straight or curved manner in the left and right direction so as to guide the frame to one side in the thickness direction.

2. A sash as described in claim 1, wherein the plurality of door rollers are spaced apart in the thickness direction, and the plurality of door roller rails have straight portions that are parallel to each other on the side opposite the door end and extend along the left-right direction.

3. The sash as described in claim 1, wherein the shoji frame includes a pulling mechanism that moves the shoji frame toward the door end and to one side in the thickness direction in conjunction with the operation of a lever when each of the multiple door rollers moves to the pushing portion.

4. A sash as described in claim 1, wherein an upper guide rail is provided at the top of the opening along the left-right direction, and a protrusion is provided partially in the left-right direction at the top of the shoji frame located inside the upper guide rail and has a protrusion protruding toward the side of the upper guide rail.

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