Gaskets and shoji screens

The gasket design with a rigid base and flexible sealing portions, featuring movement-retaining pieces, addresses the issue of wind-induced panel movement, ensuring airtightness and watertightness by maintaining contact with the panel.

JP2026083791APending Publication Date: 2026-05-20YKK AP INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
YKK AP INC
Filing Date
2024-11-08
Publication Date
2026-05-20

AI Technical Summary

Technical Problem

Conventional gaskets between a frame and a panel are prone to loss of airtightness and watertightness due to bending under wind pressure loads, as the soft seal portions only press against the panel from one side, allowing gaps to form when the panel moves.

Method used

A gasket design with a rigid base and flexible sealing portions, featuring movement-retaining pieces that protrude toward the panel to maintain contact, and a gap between these pieces and the panel, preventing excessive panel movement and ensuring airtightness and watertightness.

Benefits of technology

The gasket maintains airtightness and watertightness even under wind pressure by restricting panel movement, enhancing contact with the flexible sealing portions and preventing gaps, thus improving sealing performance.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide gaskets and sashes that can maintain airtightness and watertightness even when subjected to wind pressure loads. [Solution] The gasket 30 has a hard base portion 31 and a pair of soft sealing portions 41A and 41B. Movement-restricting pieces (first restricting piece 351, second restricting piece 352) are formed on the side pieces 33A and 33B of the hard base portion 31, protruding toward the panel 12. The first restricting piece 351 and the second restricting piece 352 are sized to be positioned with gaps C1 and C2 between them and the panel 12.
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Description

Technical Field

[0001] The present invention relates to gaskets and shoji screens interposed between a frame and a panel or the like.

Background Art

[0002] Conventionally, a gasket interposed between a frame and a panel has been known (see Patent Document 1). This gasket is formed in a substantially U-shaped cross section by combining two gasket components having a base portion made of a hard material and a seal portion made of a soft material. Each of the base portions has a side piece and an other side piece and is formed in a substantially L-shaped cross section, and the seal portion is integrally provided at the end of the other side piece. When two gasket components are combined to form a gasket having a substantially U-shaped cross section, each seal portion closes the gap between the panel material and the frame, thereby maintaining the airtightness and watertightness between the panel and the frame.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the gasket described in Patent Document 1, since the soft seal pieces provided above and below the inner surface of the seal portion only press against the panel, for example, when the panel receives a wind pressure load from the outdoor side, the seal portion on the indoor side where the panel is pressed is likely to bend, and due to this bending, if the panel moves to the indoor side and a gap is formed between the panel and the seal portion on the outdoor side, the airtightness and watertightness between the frame and the panel may decrease.

[0005] An object of the present invention is to provide a gasket and a shoji screen that can maintain airtightness and watertightness even when receiving a wind pressure load. [Means for solving the problem]

[0006] The gasket of the present invention is a gasket interposed between a frame and a panel, comprising a rigid base having a bottom piece and a pair of side pieces, and a pair of flexible sealing portions provided on the pair of side pieces and in contact with the panel, wherein each of the pair of side pieces has a movement-retaining piece formed protruding toward the panel to maintain the contact state of the flexible sealing portion with the panel, and the pair of movement-retaining pieces are arranged with a gap between them and the panel when interposed between the frame and the panel.

[0007] The shoji screen of the present invention is characterized by comprising a frame, a panel disposed within the frame, and the aforementioned gasket of the present invention interposed between the frame and the panel. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide gaskets and sliding doors that can maintain airtightness and watertightness even when subjected to wind pressure loads. [Brief explanation of the drawing]

[0009] [Figure 1] A vertical cross-sectional view showing a sliding window equipped with a shoji screen according to an embodiment of the present invention. [Figure 2] A cross-sectional view showing a sliding window as shown in Figure 1. [Figure 3] Figure 1 is an explanatory diagram showing a magnified view of the gasket used in the shoji screen. [Figure 4] Figure 3 is a cross-sectional view showing an enlarged view of the gasket installation. [Figure 5] Figure 3 is an explanatory diagram showing a magnified view of the gasket's operating state. [Figure 6] Figure 3 is an explanatory diagram showing a modified example of the gasket. [Modes for carrying out the invention]

[0010] [Structure of this embodiment] Embodiments of the present invention will be described below with reference to the drawings. In Figures 1 and 2, the shoji screen 10 according to this embodiment constitutes an outer shoji screen 3 and an inner shoji screen 4 that are slidably installed within the window frame 2 of a sliding window 1. The shoji screen 10 comprises a frame body 11 and a panel 12 such as a glass panel arranged within the frame body 11, with a gasket 30 interposed between the frame body 11 and the panel 12 as a glazing gasket. The panel 12 is rectangular in shape, and in this embodiment it is composed of a double-layered glass panel with a spacer interposed between two glass panels, but it may also be composed of a single layer with one glass panel, or it may be composed of a double layer with three or more glass panels. For convenience, in the following explanation, the left-right direction of the sliding window 1 will be defined as the X-axis direction, the up-down direction of the sliding window 1 will be defined as the Y-axis direction, and the depth direction (out-of-plane direction, interior-exterior direction) of the sliding window 1 will be defined as the Z-axis direction.

[0011] The frame 11 is composed of a composite profile combining an extruded metal profile (aluminum profile in this embodiment) for the exterior and an extruded resin profile for the interior. The frame 11 comprises an upper frame 21 and a lower frame 22 along the X-axis, and left and right vertical frames 23 along the Y-axis, and is assembled along the four sides of the panel 12. Each of the frame members, such as the upper frame 21, the lower frame 22, and the left and right vertical frames 23, has a projection portion 25 along the Z-axis and a pair of facing portions 26 (26A, 26B) made of aluminum that are continuous with the projection portion 25 and extend inward along the Y-axis from the projection portion 25. The projection portion 25 and the pair of facing portions 26A, 26B form a groove portion 27 in which the peripheral edge of the panel 12 is positioned. The visible piece 26A is an exterior visible piece positioned on the exterior side relative to the visible piece 26B. The tip of the visible piece 26A is a bent portion 261 (see Figure 4) that is bent in a hook shape toward the panel 12 side. The metal bent portion 261 is in contact with the side end piece 332 and the soft seal portion 41A of the side piece 33A, and is positioned on the back side (exterior side) relative to the first blocking piece 351 of the side piece 33A. The visible piece portion 26B is an indoor-side visible piece portion located on the indoor side relative to the visible piece portion 26A. The tip of the visible piece portion 26B is engaged with an engaging piece portion 28 (see Figure 4) made of resin profile material. The resin engaging piece portion 28 abuts against the side end piece portion 332 and the soft sealing portion 41B of the side piece 33B, and is located on the back side (indoor side) relative to the first blocking piece 351 of the side piece 33B. On its indoor side, the gasket 30 abuts only against the resin portion including the engaging piece portion 28, and does not abut against the visible piece portion 26B.

[0012] The gasket 30 is a resin glazing gasket interposed between the frame members 21, 22, 23 and the panel 12 in the groove 27 described above. As shown in Figure 3, the gasket 30 integrally comprises a hard base portion 31 made of hard resin and a soft sealing portion 41 (41A, 41B) made of soft resin.

[0013] The rigid base portion 31 has a bottom piece 32 oriented along the Z-axis direction and a pair of side pieces 33 (33A, 33B) that are continuous with the bottom piece 32. The bottom piece 32 has stepped portions 321 formed at both ends in the Z-axis direction, and the intermediate portion 322 between the stepped portions 321 is positioned on the outer circumference side of the stepped portions 321, and a hole is formed in the intermediate portion 322. When the gasket 30 is installed on the panel 12, the stepped portions 321 abut against the panel 12, and the intermediate portion 322 is positioned away from the panel 12, forming a space between them. This space can be used as a drainage space from which water can be drained through the hole. Note that the hole does not need to be formed in gaskets 30 installed in locations where drainage is not required. Each of the pair of side pieces 33A and 33B is continuous with the end of the stepped portion 321 of the bottom piece 32 and has an inclined piece portion 331 that extends inward, with its inner end positioned further away from the panel 12 in the Z-axis direction than its outer end, and a side end piece portion 332 that extends inward from the inner end of the inclined piece portion 331 in the in-plane direction (in-plane direction along the X,Y axis directions). The inner end of the inclined piece portion 331 forms a protruding portion 334 that projects toward the adjacent visible piece portion 26 (26A, 26B) than the side end piece portion 332, and the protruding portion 334 is positioned to engage in the in-plane direction with the tip of the bent portion 261 of the visible piece portion 26A and the engaging piece portion 28 of the resin profile. The side pieces 33A and 33B are in direct contact with the visible pieces 26A and 26B without the intervening soft resin portion, and are directly supported by the visible pieces 26A and 26B in the Z-axis direction. Furthermore, each of the side pieces 33A and 33B has a first blocking piece 351 and a second blocking piece 352 that project in the Z-axis direction toward the panel side from the side piece 33A and 33B. The first blocking piece 351 and the second blocking piece 352 are configured as movement blocking pieces that prevent the panel 12 from moving beyond a predetermined distance in the Z-axis direction, and are spaced further apart toward the projection piece 25 than the tips of the visible pieces 26A and 26B. These movement blocking pieces are provided on both the side piece 33A and the side piece 33B, forming a pair, and their dimensions and arrangement in the Z-axis direction are set so that when installed interposed between the frame 11 and the panel 12, they are positioned with gaps C1 and C2 between them and the panel 12. The first blocking piece 351 is positioned on the inner circumference, spaced further from the bottom piece 32 than the second blocking piece 352, and on the outer circumference, further from the inner end of the visible piece portions 26A and 26B. In this embodiment, the first blocking piece 351 protrudes from the end of the side end piece portion 332. The first blocking piece 351 is formed to be smaller in the Z-axis direction than the second blocking piece 352, and is positioned with a larger gap C1 between it and the panel 12 than the gap C2 between the second blocking piece 352 and the panel 12. A soft portion 43, described later, is provided at the tip of the first blocking piece 351, and the gap C3 between the soft portion 43 and the panel 12 is slightly smaller than the gap C2. The second blocking piece 352 is arranged at a position closer to the inclined piece portion 331 than the first blocking piece 351 and is arranged at an in-plane interval from the first blocking piece 351. In this embodiment, the second blocking piece 352 protrudes from the inclined piece portion 331. The second blocking piece 352 has a larger dimension in the Z-axis direction than the first blocking piece 351 and is arranged with a smaller gap C2 from the panel 12 than the aforementioned gap C1.

[0014] The soft seal portions 41 (41A, 41B) are provided on each of the side pieces 33A and 33B. That is, a pair of them is provided with respect to the rigid base portion 31. The soft seal portions 41A and 41B are continuous with the tip of the side end piece portion 332 and the first blocking piece 351 and protrude toward the panel 12 side from the tip positions of the first blocking piece 351 and the second blocking piece 352 as a flexible seal piece, the first seal piece 42, and are continuous with the second blocking piece 352 and protrude toward the panel 12 side from the tip positions of the first blocking piece 351 and the second blocking piece 352 as a flexible seal piece, the second seal piece 45.

[0015] The first seal piece 42 extends obliquely upward toward the panel 12, and its tip abuts against the panel 12 and is bent. A soft portion 43 provided at the tip of the first blocking piece 351 is continuous with the first seal piece 42. This soft portion 43 is arranged with a gap C3 smaller than the gap C2 between the second blocking piece 352 and the panel 12 from the panel 12. Further, the first seal piece 42 has a stepped portion 44 that applies in the Z-axis direction to the tip of the finding piece portion 26A and the engaging piece portion 28 of the resin molding. By the stepped portion 44 applying to the housing 11, the soft seal portions 41A and 41B are more firmly received with respect to the housing 11. This first seal piece 42 protrudes toward the panel 12 side from the first blocking piece 351 and the second blocking piece 352.

[0016] The second seal piece 45 is provided by branching in a tree shape from the middle portion of the second blocking piece 352 toward the negative film 32 side (outer peripheral side), extends obliquely downward toward the panel 12, and its tip abuts against the panel 12 and is bent. This second seal piece 45 protrudes toward the panel 12 side more than the first blocking piece 351 and the second blocking piece 352.

[0017] In the gasket 30 described above, the sum (C1 + C1) of the distances (gaps) in the Z-axis direction between the pair of first blocking pieces 351 and the panel 12 is set smaller than the sum (L1 + L1) of the distances L1 of the portions where the first seal piece 42 protrudes toward the panel 12 side more than the tip position of the first blocking piece 351. Also, the sum (C2 + C2) of the distances (gaps) in the Z-axis direction between the pair of second blocking pieces 352 and the panel 12 is set smaller than the sum (L2 + L2) of the distances L2 of the portions where the second seal piece 45 protrudes toward the panel 12 side more than the tip position of the second blocking piece 352. Note that the distance L1 is larger than the distance L2. Therefore, even when the panel 12 moves in the Z-axis direction under an out-of-plane wind pressure load, the first blocking piece 351 and the second blocking piece 352 prevent the panel 12 from moving by a predetermined amount or more, so that the first seal piece 42 and the second seal piece 45 can maintain the state of being in contact with the panel 12, and the airtightness and watertightness can be improved.

[0018] [Function and effect] Hereinafter, in the sliding window 1 including the above-described shoji 10, the function and effect when the shoji 10 receives a wind pressure load in the Z-axis direction from the outdoor side will be described. Note that FIGS. 4 and 5 show the gasket 30 interposed between the vertical frame 23 (outer mating frame) and the panel 12. First, the panel 12 that receives the wind pressure load deflects while pressing the first seal piece 42 and the second seal piece 45 of the soft seal portion 41A disposed on the outdoor side toward the indoor side in the Z-axis direction, and also tends to separate from the first seal piece 42 and the second seal piece 45 of the soft seal portion 41A disposed on the outdoor side toward the indoor side in the Z-axis direction. Next, when the gap C3 on the indoor side is eliminated, the soft part 43 (see Figure 3) elastically contacts the indoor surface of the panel 12, and then when the gap C2 is eliminated, the second blocking piece 352 contacts the indoor surface of the panel 12, changing the state from that shown in Figure 4 to that shown in Figure 5. Note that the first blocking piece 351 receives the indoor surface of the panel 12 via the soft part 43, so although the gap C1 narrows, it does not disappear. On the other hand, on the outdoor side, the panel 12 is moving away from the soft sealing part 41A in the Z-axis direction, so the gaps C1 to C3 also widen somewhat. Here, as mentioned above, with the distance-set gasket 30, the first blocking piece 351 and the second blocking piece 352 prevent the movement of the panel 12 before a gap is formed between the first sealing piece 42 and the second sealing piece 45 and the panel 12 on the outdoor side, thus suppressing the formation of such a gap. Furthermore, since the side pieces 33A and 33B are in direct contact with the frame 11 without going through the soft parts of the soft sealing portions 41A and 41B, they are firmly supported by the frame 11. As a result, the panel 12 can be supported more firmly by the first blocking piece 351 and the second blocking piece 352. In this way, the shoji screen 10 maintains the contact state of the soft sealing parts 41A and 41B with the panel 12 by movement-retaining pieces (first retaining piece 351, second retaining piece 352) that are formed to protrude toward the panel 12 from each of the side pieces 33A and 33B, thereby improving the airtightness and watertightness between the frame 11 and the panel 12.

[0019] Furthermore, since the flexible portion 43 is positioned with a gap C3 between it and the panel 12, interference between the flexible portion 43 and the panel 12 can be suppressed, the gasket 30 can be easily attached to the periphery of the panel 12, and since the second sealing piece 45 branches out diagonally downward from the middle portion of the second blocking piece 352, the workability of assembling the gasket 30 and the panel 12 can be improved, a gap C2 can be formed between the second blocking piece 352 and the panel 12, and the second sealing piece 45 itself can be made longer, allowing the second sealing piece 45 to contact the panel 12 more favorably.

[0020] [Differentiation] In the above embodiment, a first blocking piece 351 and a second blocking piece 352 are provided, but the embodiment is not limited to this, and if either of these can prevent the panel 12 from moving by a predetermined amount or more, the configuration of either the first blocking piece 351 or the second blocking piece 352 may be omitted. In the above embodiment, the soft part 43 is positioned with a gap C3 between it and the panel 12. However, it is not limited to this configuration, and if there is no problem with assembly workability, it may be in contact with the panel 12 without a gap C3. In the above embodiment, the first sealing piece 42 extends diagonally upward toward the panel 12, but it is not limited to this configuration. It may extend straight along the Z-axis toward the panel 12, or it may extend diagonally downward toward the panel 12, as long as it can be configured to properly abut the panel 12. In the above embodiment, the second sealing piece 45 extends diagonally downward toward the panel 12, but it is not limited to this, and may extend straight along the Z-axis toward the panel 12, or diagonally upward toward the panel 12, as long as it can properly contact the panel 12 and does not cause any problems with assembly workability. In the above embodiment, the flexible sealing portion 41 has a stepped portion 44 related to the frame 11, but it is not limited to this, and the stepped portion 44 may be omitted if the flexible sealing portion 41 is firmly supported by the frame 11 even without the stepped portion 44. In the above embodiment, the side pieces 33A and 33B are in direct contact with the frame 11. However, the embodiment is not limited to this, and the side pieces 33A and 33B may be indirectly supported by the frame 11, even with a soft portion between them, as long as the frame 11 can firmly support them. In the above embodiment, the gasket 30 is in contact only with the resin portion including the engaging piece 28 on its indoor side, and is not in contact with the visible piece 26B. However, the gasket 30 is not limited to this, and may be in contact with the visible piece 26B, which is a metal portion, as long as sufficient heat insulation can be maintained. In the above embodiment, the bottom piece 32 of the hard base 31 has stepped portions 321 formed at both ends thereof, but the configuration of these stepped portions 321 may be omitted, for example, as shown in Figure 6. In the above embodiment, the gasket 30 is configured to be interposed between the frame 11 and the panel 12, but it may also be configured to be interposed between various types of frames and various types of panels. In the above embodiment, the fixture equipped with the shoji screen 10 was described as a sliding window 1, but other types of windows may also be used.

[0021] [Summary of the invention] (1) The gasket of the present invention is a gasket interposed between a frame and a panel, comprising a rigid base having a bottom piece and a pair of side pieces, and a pair of flexible sealing portions provided on the pair of side pieces and in contact with the panel, wherein each of the pair of side pieces has a movement-retaining piece formed protruding toward the panel to maintain the contact state of the flexible sealing portion with the panel, and the pair of movement-retaining pieces are arranged with a gap between them and the panel when interposed between the frame and the panel. According to the gasket of the present invention, even if the panel moves by a predetermined amount, the movement-restricting piece prevents the panel from moving beyond a predetermined amount, thereby suppressing the formation of a gap between the sealing piece and the panel. This allows for maintaining airtightness and watertightness between the frame and the panel. (2) In the gasket of the present invention, each of the pair of soft sealing portions has a flexible sealing piece that protrudes toward the panel side beyond the tip position of the movement-retaining piece, and the sum of the distances between the pair of movement-retaining pieces and the panel may be less than the sum of the distances of the portions of the pair of sealing pieces that protrude beyond the tip positions of the pair of movement-retaining pieces. With this configuration, even when the movement of the panel is blocked by the movement-restricting piece, the contact between the sealing piece and the panel can be maintained. (3) In the gasket of the present invention, each of the side pieces has a first stopping piece and a second stopping piece as the movement stopping piece, the first stopping piece is positioned further apart from the bottom piece than the second stopping piece, and a soft portion may be provided at the tip of the first stopping piece. With this configuration, when the panel is pressed against by wind pressure and the sealing piece flexes, causing the panel to move slightly out of plane, the aforementioned soft part first comes into contact with the panel, elastically resisting the panel's movement, and this contact can also enhance airtightness and watertightness. Furthermore, if the panel moves further, both the first and second stopping pieces can firmly prevent the panel from moving beyond a predetermined amount. (4) In the gasket of the present invention, the soft portion may be positioned between itself and the panel with a gap smaller than the gap between the second blocking piece and the panel. With this configuration, interference between the soft material and the panel can be suppressed, and the gasket can be easily attached to the periphery of the panel. (5) In the gasket of the present invention, each of the side pieces has a first stopping piece and a second stopping piece as the movement stopping piece, the first stopping piece is positioned further apart from the bottom piece than the second stopping piece, and the soft sealing portion may have a first sealing piece that is continuous with the first stopping piece and extends diagonally upward toward the panel, and a second sealing piece that is continuous with the second stopping piece and extends diagonally downward toward the panel. With this configuration, by bringing both the first and second sealing pieces into contact with the panel, airtightness and watertightness can be improved. Furthermore, by extending the second sealing piece diagonally downwards, the ease of assembly of the gasket and panel can also be improved. (6) In the gasket of the present invention, the second sealing piece may be provided branching from the intermediate portion of the second blocking piece toward the bottom piece. With this configuration, a predetermined gap can be formed between the second blocking piece and the panel, and the second sealing piece can be made longer, allowing the second sealing piece to more favorably contact the panel. (7) The shoji screen of the present invention is characterized by comprising a frame, a panel disposed within the frame, and the gasket of the present invention described above interposed between the frame and the panel. According to the present invention, it is possible to construct a shoji screen that can exhibit the same effects as the gasket of the present invention described above. (8) In the shoji screen of the present invention, the frame has a projection portion and a pair of facing portions continuous with the projection portion, and the projection portion and the pair of facing portions form a groove in which the panel is placed, the movement-preventing piece is positioned at a distance from the tip of the facing portion toward the projection portion, and the soft sealing portion may have a stepped portion that fits over the frame. With this configuration, the stepped portion of the flexible seal engages with the tip of the protruding piece, allowing the flexible seal to be firmly supported by the frame compared to when the stepped portion is absent, thereby improving airtightness and watertightness. (9) In the shoji screen of the present invention, the frame has a projection piece and a pair of facing pieces continuous with the projection piece, and the projection piece and the pair of facing pieces form a groove in which the panel is placed, and the side piece may be in direct contact with the frame. With this configuration, for example, compared to a case where a soft portion is interposed between the side piece and the facing piece, and the side piece is indirectly supported by the facing piece, the side piece can be firmly supported by the facing piece. This prevents the panel subjected to wind pressure load from moving out of plane by a predetermined amount or more, thereby improving airtightness and watertightness. (10) In the shoji screen of the present invention, the frame has a groove formed of a metal portion in which the peripheral edge of the panel is arranged, and the frame is provided with a resin portion that is combined with the metal portion on its indoor side, and the gasket may abut the metal portion on the outdoor side and abut only the resin portion on the indoor side. With this configuration, the frame's strength against wind pressure loads can be improved by forming the groove where the panel's periphery is positioned with a metal part, and the thermal insulation can be improved by providing a resin part on the interior side. Furthermore, the gasket on which the aforementioned movement-preventing piece is provided can be firmly held by the metal part of the frame forming the groove, allowing the movement of the panel toward the interior to be prevented more precisely by the movement-preventing piece, and further improving the airtightness and watertightness between the frame and the panel. [Explanation of Symbols]

[0022] 1...Sliding window, 10...Sash, 11...Frame, 12...Panel, 2...Window frame, 21...Upper frame, 22...Lower frame, 23...Vertical frame, 25...Filling piece, 26 (26A, 26B)...Face piece, 261...Bend, 27...Groove, 28...Engaging piece, 3...Outer sash, 30...Gasket, 31...Hard base, 32...Bottom piece, 321... step part, 322... middle part, 33 (33A, 33B)... side piece, 331... inclined piece part, 332... side end piece part, 334... protruding part, 351... first blocking piece, 352... second Blocking piece, 4...Inner shoji (shoji), 41 (41A, 41B)...Soft seal part, 42...First seal piece, 43...Soft part, 44...Step part, 45...Second seal piece, C1~C3...Gap.

Claims

1. A gasket interposed between the frame and the panel, It has a rigid base having a bottom piece and a pair of side pieces, and a pair of flexible sealing parts provided on the pair of side pieces and in contact with the panel, Each of the pair of side pieces has a movement-retaining piece formed on it that protrudes toward the panel, maintaining the contact state of the soft sealing portion with the panel, and the pair of movement-retaining pieces are positioned with a gap between them and the panel when installed interposed between the frame and the panel. A gasket characterized by the following features.

2. In the gasket according to claim 1, Each of the pair of flexible sealing portions has a flexible sealing piece that protrudes toward the panel side beyond the tip position of the movement-restricting piece. The sum of the distances between the pair of movement-blocking pieces and the panel is less than the sum of the distances of the portions of the pair of sealing pieces that protrude beyond the tip positions of the pair of movement-blocking pieces. A gasket characterized by the following features.

3. In the gasket according to claim 1, Each of the side pieces has a first stopping piece and a second stopping piece as the movement stopping piece, The first blocking piece is positioned further apart from the bottom piece than the second blocking piece. A soft portion is provided at the tip of the first blocking piece. A gasket characterized by the following features.

4. In the gasket according to claim 3, The soft portion is positioned between itself and the panel with a gap smaller than the gap between the second blocking piece and the panel. A gasket characterized by the following features.

5. In the gasket according to claim 1, Each of the side pieces has a first stopping piece and a second stopping piece as the movement stopping piece, The first blocking piece is positioned further apart from the bottom piece than the second blocking piece. The flexible sealing portion includes a first sealing piece that is continuous with the first blocking piece and extends diagonally upward toward the panel, and a second sealing piece that is continuous with the second blocking piece and extends diagonally downward toward the panel. A gasket characterized by the following features.

6. In the gasket according to claim 5, The second sealing piece is provided by branching off from the intermediate portion of the second blocking piece toward the bottom piece. A gasket characterized by the following features.

7. The system comprises a frame, a panel disposed within the frame, and a gasket according to any one of claims 1 to 6 interposed between the frame and the panel. A shoji screen characterized by the following features.

8. In the shoji screen according to claim 7, The frame has a projection portion and a pair of facing portions continuous with the projection portion, and the projection portion and the pair of facing portions form a groove in which the panel is placed. The movement-preventing piece is positioned at a distance from the tip of the visible piece towards the visible piece. The soft sealing portion has a stepped portion that fits over the frame. A shoji screen characterized by the following features.

9. In the shoji screen according to claim 7, The frame has a projection portion and a pair of facing portions continuous with the projection portion, and the projection portion and the pair of facing portions form a groove in which the panel is placed. The side piece is in direct contact with the frame. A shoji screen characterized by the following features.

10. In the shoji screen according to claim 7, The frame has a groove formed of metal where the peripheral edge of the panel is positioned. The frame is provided with a resin portion that is combined with the metal portion on its interior side. The gasket abuts the metal portion on the outdoor side and abuts only the resin portion on the indoor side. A shoji screen characterized by the following features.