Cover units and joinery

Abstract

We provide highly watertight building components and cover units to achieve this. [Solution] The cover unit 30 includes a cover plate 31 (cover member) capable of covering the gap between the sash 10 and the shoji screen 20, a hinge unit 32 (switching member) that allows switching between the state of the cover plate 31 between a covered state (Figure 2) that covers the gap between the sash 10 and the shoji screen 20 and a retracted cover state (Figure 3(A)) that is retracted from the covered state, and a drip plate 33 (cover member support structure) capable of supporting the cover plate 31 in the retracted cover state. Here, the gap between the sash 10 and the shoji screen 20 is the gap between the lower end of the plate body 21 and each rail 12U, 12L when the wheel groove 22X of the wheel 22 engages with the upper rail 12U, and is the wheel housing hole 21Y.

Description

Technical Field

[0006] , , , ,

[0001] The present invention relates to a cover unit and a fitting.

Background Art

[0002] As a fitting for switching the opening and closing of a building opening, a sash provided in the opening and a shoji screen disposed in the internal space of the sash are known. Since the shoji screen is slidable or rotatable with respect to the sash, the opening and closing of the opening can be performed by sliding or rotating the shoji screen. Such a fitting provided on a wall partitioning a bathroom and a dressing room is known (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] <00偶025>By the way, with the recent warming phenomenon, the climate in the country is becoming subtropical. For this reason, extremely strong storms have come to hit various parts of Japan. In such a situation, rainwater is likely to penetrate through the gap between the sash and the shoji screen. <偶000027><0000偶28>In view of such circumstances, the present invention aims to provide a fitting with high watertightness and a cover unit for realizing the same.

Means for Solving the Problems

[0006] <0000偶33>The cover unit of the present invention comprises a sash, a closing device provided in an opening formed in the sash and capable of closing the opening, a cover member capable of covering the gap between the sash and the closing device, and a switching member that allows the state of the cover member to be switched between a covered state that covers the gap and a retracted cover state that is retracted from the covered state, wherein the closing device is switchable between a closed state that closes the opening and an open state that leaves the gap open.

[0007] It is preferable to have a cover member support structure capable of supporting the cover member in the retracted state.

[0008] The cover member is provided with a protrusion on the surface facing the cover member support structure when the cover is retracted, and the cover member support structure is provided with a recess capable of accommodating the protrusion when the cover member is in the retracted state, and when the cover member is in the retracted state, it is preferable that the protrusion blocks the gap between the cover member and the cover member support structure. Furthermore, the cover member is provided with a protrusion on the surface facing the cover member support structure when the cover is retracted, and when the cover member is in the cover state, it is preferable that the protrusion extends upward or away from the sash.

[0009] The system further includes a lateral shielding plate that closes the gap between the cover member and the sash in the covered state, and it is preferable that the lateral shielding plate protrudes from the cover member toward the sash in the covered state.

[0010] Preferably, the switching member comprises a first switching portion provided on the sash or the cover member support structure, and a second switching portion extending from the cover member and capable of engaging with the first switching portion, wherein one of the first switching portion and the second switching portion is rotatable relative to the other, and the cover member can be switched between the covered state and the retracted state by the rotational movement between the first switching portion and the second switching portion.

[0011] The first switching section is provided with first protrusions arranged at predetermined intervals in the rotational direction, and the second switching section is provided with second protrusions arranged at predetermined intervals in the rotational direction, and it is preferable that the rotational movement between the first switching section and the second switching section is restricted when the first protrusions are engaged with the second protrusions.

[0012] The first projection is switchable between an engaged state in which it engages with the second projection and an engaged-retracted state in which it retracts from the engaged state, and it is preferable that rotational movement between the first switching part and the second switching part is possible when it is in the engaged-retracted state.

[0013] The cover member support structure preferably includes a drip plate positioned on the outdoor side with respect to the sash.

[0014] The first switching section is preferably provided so as to protrude from the drain plate.

[0015] The cover member support structure preferably includes a frame positioned on the indoor space side with respect to the sash, and the first switching portion is provided to protrude from the sash.

[0016] The building fitting of the present invention is characterized by comprising the above-mentioned cover unit, the sash, and the closing device. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide a highly watertight building component and a cover unit for achieving it. [Brief explanation of the drawing]

[0018] [Figure 1] The diagrams schematically show the joinery; (A) is a perspective view of the joinery in the closed state, (B) is an exploded perspective view of the joinery, and (C) is a perspective view of the joinery in the open state. [Figure 2] This is a schematic partial cross-sectional view showing the general outline of the joinery. [Figure 3](A) is a side view schematically showing an overview of a cover plate in a cover retracted state, and (B) is a side view schematically showing an overview of the cover plate in an upright posture. [Figure 4] It is a plan view schematically showing an overview of a fitting. [Figure 5] It is an enlarged view of a main part showing a hinge unit in an engagement retracted state. [Figure 6] It is an enlarged view of a main part showing a hinge unit in an engaged state. [Figure 7] It is a partial cross-sectional view schematically showing an overview of a fitting (modified example).

Mode for Carrying Out the Invention

[0019] [[ID=十九]] As shown in FIGS. 1 to 2, the fitting 2 includes a sash 10 provided on a wall W1 of a building, a plurality of shoji 20 (closing members) capable of closing an opening of the sash 10, and a cover unit 30 (FIG. 2) capable of covering a gap between the sash 以及 the shoji 20.

[0020] Hereinafter, for convenience of explanation, an arbitrary direction in the horizontal plane is defined as the X direction, a direction orthogonal to the X direction among arbitrary directions in the horizontal plane is defined as the Y direction, and a direction orthogonal to the horizontal plane is defined as the Z direction.

[0021] The wall W1 partitions an indoor space and an outdoor space and is formed to extend in the X direction and the Z direction.

[0022] The sash 10 is provided in an opening WX formed in the wall W1 (FIG. 1(B)). The sash 10 is a frame body having a rectangular shape when viewed from the front, an upper side portion 11 extending in the X direction, a lower side portion 12 located below the upper side portion 11 and extending in the X direction, one side portion 13 connecting one end portion of the upper side portion and one end portion of the lower side portion , and the other side portion 14 connecting the other end portion of the upper side portion and the other end portion of the lower side portion . Further, the one side portion 13 and the other side portion 14 extend in the Z direction.

[0023] It should be noted that there is an error in the numbering in the original text. The number "十九" should be "19". This has been corrected in the translation for clarity.As shown in Figure 2, an upper rail 12U extending in the X direction and a lower rail 12L extending in the X direction are formed at the upper end of the lower edge portion 12. The upper rail 12U is located closer to the indoor space than the lower rail 12L. The upper end of the upper rail 12U is located above the upper end of the lower rail 12L.

[0024] The shoji screen 20 comprises a panel 21, a wheel 22 positioned at the lower end of the panel 21, and a wheel axle 23 that holds the wheel 22 in a rotatable state.

[0025] The plate body 21 is rectangular in front view and extends in the X and Z directions. A wheel housing hole 21Y for housing a wheel 22 is formed at the lower end of the plate body 21. The wheel axle 23 extends in the Y direction and is attached to the lower end of the plate body 21 so as to pass through the wheel housing hole 21Y. In this embodiment, one wheel axle 23 is provided at each end of the lower end of the plate body 21 in the X direction. The wheel housing hole 21Y is formed to extend from one wheel axle 23 to the other wheel axle 23.

[0026] The wheel 22 is formed in a disc shape, with a wheel axle 23 passing through its center. The wheel 22, with the wheel axle 23 passing through it, is rotatable around the wheel axle 23 in the wheel housing hole 21Y. A wheel groove 22X is formed on the circumferential surface of the wheel 22. The wheel groove 22X can engage with the upper rail 12U and the lower rail 12L. When the wheel groove 22X of the wheel 22 engages with the upper rail 12U, the sash 20 can slide along the upper rail 12U, i.e., in the X direction. Similarly, when the wheel groove 22X of the wheel 22 engages with the lower rail 12L, the sash 20 can slide along the lower rail 12L, i.e., in the X direction. In this way, the sash 20 can be switched between a closed state (Figure 1(A)) that closes the opening 10X of the sash 10 and an open state (Figure 1(C)) that opens the opening 10X.

[0027] As shown in Figures 2-3, the cover unit 30 includes a cover plate 31 (cover member) capable of covering the gap between the sash 10 and the sliding screen 20, a hinge unit 32 (switching member) that allows switching between the state of the cover plate 31 between a covered state (Figure 2) covering the gap between the sash 10 and the sliding screen 20 and a retracted cover state (Figure 3(A)) when the cover is retracted from the covered state, and a drip plate 33 (cover member support structure) capable of supporting the cover plate 31 in the retracted cover state. Here, the gap between the sash 10 and the sliding screen 20 is the gap between the lower end of the plate body 21 and each rail 12U, 12L when the wheel groove 22X of the wheel 22 engages with the upper rail 12U, and is the wheel housing hole 21Y.

[0028] The cover plate 31 is a rectangular plate in front view, and in its upright state (Figure 3(B)), the cover plate 31 extends in the X and Z directions. The length of the cover plate 31 in the X direction is such that it can cover the entire length of the upper rail 12U and the lower rail 12L in the X direction (Figure 4). In addition, the height of the cover plate 31 in the Z direction in its upright state (Figure 3(B)) is such that the cover plate 31 in the covered state (Figure 2) can cover the gap between the sash 10 and the sliding door 20. Furthermore, as in this embodiment, when multiple rails are formed with the upper rail 12U and the lower rail 12L, it is preferable that the cover plate 31 in the covered state (Figure 2) can cover the gap in each rail. For example, it is preferable that the upper end of the cover plate 31 in the covered state (Figure 2) is higher than the upper end of each rail 12U, 12L.

[0029] As shown in Figure 2, the flashing plate 33 comprises a flashing plate body 33A extending from the lower edge 12 of the sash 10 toward the outdoor space, and a rail mechanism 33B provided on the upper surface of the flashing plate body 33A. The height of the flashing plate body 33A decreases from the base end toward the tip. The rail mechanism 33B extends in the X direction.

[0030] As shown in Figures 5-6, the hinge unit 32 includes a mounting plate 32A placed on the upper surface of the drain plate 33 (Figure 2), a protrusion 32B projecting upward from the upper surface of the mounting plate 32A, a curved portion 32C (first switching portion) extending from the upper end of the protrusion 32B, a rotating portion 32D (second switching portion) that can engage with the curved portion 32C, a retaining portion 32E provided at the tip of the rotating portion 32D, a cover plate connecting portion 32F that connects to the cover plate 31, and a locking portion 32L projecting in the Z direction from the upper surface of the mounting plate 32A.

[0031] The mounting plate 32A is formed in a rectangular shape when viewed from the front and engages with the rail mechanism 33B (Figure 2) provided on the drain plate 33. When the mounting plate 32A is engaged with the rail mechanism 33B, it is freely movable in the X direction, while its movement in the Y and Z directions is restricted. By attaching caps (not shown) to both ends of the rail mechanism 33B in the X direction, the movement of the mounting plate 32A in the X direction is restricted.

[0032] The protrusions 32B and the rotating portion 32D extend in the X direction. Preferably, the length of the protrusions 32B and the rotating portion 32D in the X direction is about the same as the length of the cover plate 31.

[0033] The curved portion 32C has its base end located at the upper end of the convex ridge 32B, and its tip extends away from the sash 10. The cross-sectional shape of the curved portion 32C in the cross-section including the Y and Z directions is an arc shape centered on the central axis AX. Here, the central axis AX is set to be further away from the sash 10 than the convex ridge 32B in the X direction (Figure 5).

[0034] The cross-sectional shape of the rotating portion 32D in a cross-section including the Y and Z directions is arc-shaped. The rotating portion 32D engages with the curved portion 32C in a concentric manner. In a cross-section including the Y and Z directions, when the radius of the cross-sectional shape of the radially outer surface 32CG of the curved portion 32C is defined as R1 and the radius of the cross-sectional shape of the radially inner surface 32DN of the rotating portion 32D is defined as R2, radius R1 is smaller than radius R2. Therefore, when the rotating portion 32D is engaged with the curved portion 32C, it can rotate freely around a common central axis AX relative to the curved portion 32C.

[0035] The retaining portion 32E extends from the tip of the rotating portion 32D toward the central axis AX. The distance between the tip of the retaining portion 32E and the radially inner surface 32DN at the base end of the rotating portion 32D is a predetermined interval CL1. Preferably, the interval CL1 is such that the curved portion 32C can pass through, that is, that the curved portion 32C can be inserted into and removed from the rotating portion 32D and the retaining portion 32E.

[0036] In a cross-section including the Y and Z directions, outer projections 32CT (first projections) are arranged at predetermined intervals around the central axis AX on the radial outer surface 32CG of the curved portion 32C. The outer projections 32CT protrude radially outward from the radial outer surface 32CG and extend in the X direction. Similarly, in a cross-section including the Y and Z directions, inner projections 32DT (second projections) are arranged at predetermined intervals around the central axis AX on the radial inner surface 32DN of the rotating portion 32D. The inner projections 32DT protrude radially towards the central axis AX and extend in the X direction.

[0037] The curved portion 32C, inserted into the rotating portion 32D and the retaining portion 32E, is movable in the radial direction of the central axis AX. Therefore, it is possible to switch between an engaged state in which the curved portion 32C is engaged with the rotating portion 32D (Figure 6) and an engaged-retracted state in which it is retracted from the engaged state (Figure 5). When the curved portion 32C is in the engaged-retracted state (Figure 5), the curved portion 32C is rotatable relative to the rotating portion 32D, while when the curved portion 32C is in the engaged state (Figure 6), the rotation of the curved portion 32C relative to the rotating portion 32D is restricted.

[0038] The cover plate connecting portion 32F extends from the base end of the rotating portion 32D, and its tip connects to the cover plate 31. In this way, the relative rotational operation of the rotating portion 32D and the curved portion 32C makes it possible to switch between the covered state (Figure 2) and the retracted cover state (Figure 3(A)) of the cover plate 31.

[0039] The locking portion 32L is intended to prevent the engagement between the rotating portion 32D and the curved portion 32C from disengaging when the cover plate 31 is in the retracted cover position, and is located on the opposite side of the sash 10 with respect to the protrusion 32B. The distance CL2 between the locking portion 32L and the protrusion 32B can be switched between the engaged state (Figure 6) and the retracted engagement state (Figure 5), and in the retracted engagement state (Figure 5), it is sufficient that the rotating portion 32D is rotatable relative to the curved portion 32C.

[0040] Next, we will explain how to use the cover unit 30.

[0041] In the engaged and retracted state (Figure 5), the cover plate 31 can be freely switched between a covered state (Figure 2) that covers the gap between the sash 10 and the sliding door 20 and a retracted cover state (Figure 3(A)) by the relative rotational operation of the rotating part 32D and the curved part 32C. When the cover plate 31 is in the covered state (Figure 2), switching from the engaged and retracted state (Figure 5) to the engaged state (Figure 6) allows the cover plate 31 to remain in the covered state (Figure 2). Similarly, when the cover plate 31 is in the retracted cover state (Figure 3(A)), switching from the engaged and retracted state (Figure 5) to the engaged state (Figure 6) allows the cover plate 31 to remain in the retracted cover state (Figure 3(A)).

[0042] Thus, according to the present invention, when the cover plate 31 is in the covering state (Figure 2), it is possible to cover the gap between the sash 10 and the shoji screen 20, making it more difficult for rainwater to seep in through the gap, even during stronger storms than before.

[0043] In the covered state (Figure 2), it is preferable that the cover plate 31 is angled toward the sash 10 more than when it is in the upright state (Figure 3(B)). For this reason, it is preferable that the cover unit 30 be equipped with a lateral shielding plate 36. When the upright state (Figure 2(B)), the lateral shielding plate 36 protrudes toward the sash 10 from both ends in the X direction of the cover plate 31. The lateral shielding plate 36 can block rainwater from flowing into the gap between the cover plate 31 and the sash 10 in the covered state (Figure 2). For this reason, the lateral shielding plate 36 only needs to have a shape that can close the gap between the cover plate 31 and the sash 10 in the covered state (Figure 2). Furthermore, when the cover plate 31 is in the covered state (Figure 2), it is preferable that the edge of the lateral shielding plate 36 engages with at least one of the lower part 12, one side part 13, and the other side part 14 of the sash 10. This increases the stability of the lateral shielding plate 36 when the cover is retracted (Figure 3(A)).

[0044] Furthermore, when air flows near the side of the cover plate 31 opposite to the sash 10 in the covered state (Figure 2), there is a risk that the cover plate 31 may switch to the retracted cover state (Figure 3(A)) due to negative pressure. According to the present invention, by creating an engaged state (Figure 6) in which the curved portion 32C engages with the rotating portion 32D, it is possible to prevent the cover plate 31 from unintentionally switching to the retracted cover state (Figure 3(A)).

[0045] Furthermore, when the cover plate 31 is in the retracted cover position (Figure 3(A)), it is preferable that the water drain plate 33 supports the cover plate 31 from below. As shown in Figures 2-3, when the water drain plate 33 supports the cover plate 31 from below, if air flows into the gap between the water drain plate 33 and the cover plate 31, the cover plate 31 may lift up relative to the water drain plate 33. To suppress the lifting of the cover plate 31, it is preferable that the cover unit 30 includes an inflow prevention mechanism 38 provided at the tip of the cover plate 31 and a housing structure 39 (recess) capable of housing the inflow prevention mechanism 38 (protrusion).

[0046] The inflow prevention mechanism 38 is a protrusion provided on the surface of the cover plate 31 on the side of the water drain plate 33 at the tip of the cover plate 31, and when in an upright position (Figure 2(B)), it protrudes in the direction opposite to the sash 10. Preferably, the length of the protrusion in the X direction is equal to the length of the cover plate 31 in the X direction. However, the length of the protrusion in the X direction may be shorter than the length of the cover plate 31 in the X direction, as long as it is within a range that prevents the cover plate 31 from lifting up.

[0047] Furthermore, when the drain plate 33 supports the cover plate 31 from below, the orientation of the inflow prevention mechanism 38 should be such that it obstructs the gap between the drain plate 33 and the cover plate 31 in the retracted state (Figure 3(A)). For example, it is preferable that it faces downwards in the Z direction or diagonally downwards towards the tip of the drain plate 33. In order to suppress the lifting of the cover plate 31, when the drain plate 33 supports the cover plate 31 from below, it is preferable that the orientation of the inflow prevention mechanism 38 faces downwards in the Z direction.

[0048] Furthermore, when the cover plate 31 is in the covering position (Figure 2), it is preferable that the orientation of the inflow prevention mechanism 38 faces in the Z direction or away from the sash 10. This prevents rainwater from flowing from the outdoor space towards the sash 12 from overflowing the cover plate 31 and reaching the gap between the sash 10 and the sash 20. As a result, watertightness can be further improved.

[0049] The accommodating structure 39 is a raised accommodating groove formed in the drain plate 33, extending in the X direction on the drain plate 33. The depth of the raised accommodating groove should be such that it can accommodate the inflow prevention mechanism 38 when the drain plate 33 supports the cover plate 31 from below (Figure 3(A)).

[0050] In the above embodiment, the cross-sectional shape of the curved portion 32C and the rotating portion 32D in the cross-section including the Y and Z directions is described as being arc-shaped. However, the present invention is not limited to this, and is not particularly limited as long as relative rotational operation between the curved portion 32C and the rotating portion 32D is possible, such as an elliptical arc shape.

[0051] In the above embodiment, the hinge unit 32 is provided on the drip plate 33, but the present invention is not limited thereto, and the hinge unit 32 may also be provided on the sash 10 on the indoor space side.

[0052] In the above embodiment, the hinge unit 32 may be provided on the sash 10 on the indoor space side. For example, as shown in Figure 7, the hinge unit 32 includes a protrusion 32B projecting in the Y direction from the indoor space side surface 12N of the lower edge 12 of the sash 10, a curved portion 32C (first switching portion) extending from the upper end of the protrusion 32B, a rotating portion 32D (second switching portion) that can engage with the curved portion 32C, a retaining portion 32E provided at the tip of the rotating portion 32D, a cover plate connecting portion 32F that connects to the cover plate 31, and a locking portion 32L. The locking portion 32L protrudes in the Y direction from a position above the protrusion 32B on the indoor space side surface 12N of the lower edge 12 of the sash 10.

[0053] By the relative rotational operation of the curved portion 32C and the rotating portion 32D, the cover plate 31 can be switched between a cover state that covers the gap between the sash 10 and the shoji screen 20 and a retracted cover state (Figure 7) in which it is retracted from the cover state. In the cover state, the cover plate 31 is preferably supported by the lower edge portion 12 of the sash 10 (for example, the surface 12N on the indoor space side). In the retracted cover state (Figure 7), the cover plate 31 is preferably supported by a frame 133 that is positioned further into the indoor space than the lower edge portion 12 of the sash 10. The frame 133 extends in the X direction along the lower edge portion 12. Here, it is preferable that the tip side of the cover plate 31 is provided with a frame-side projection 138A that protrudes toward the frame 133 when the cover plate 31 is in the retracted cover state (Figure 7). Furthermore, it is preferable that a receiving recess 139 is formed on the upper surface of the frame 133, capable of accommodating the frame-side protrusion 138A. This prevents the cover plate 31 from lifting up by allowing air to flow between the cover plate 31 and the upper surface of the frame 133 when the cover is retracted (Figure 7). It is also preferable that an opposite protrusion 138B is provided that protrudes on the opposite side from the frame 133 when the cover plate 31 is in the retracted state (Figure 7). The cover plate 31 and the opposite protrusion 138B function as receivers for water droplets generated by condensation.

[0054] The length of the receiving recess 139 in the Y direction should be such that it can accommodate the frame-side protrusion 138A when the cover plate 31 is in the cover retracted state (Figure 7). As shown in the figure, it may extend from the middle of the Y direction on the upper surface of the frame 133 toward the sash 10. Although not shown in the figure, it may also be a groove-like structure formed in the middle of the Y direction on the upper surface of 133.

[0055] Furthermore, when the cover plate 31 is in the retracted cover state (Figure 7), it is preferable that the cover plate 31 is movable in the Y direction to such an extent that it is possible to switch between the engaged state and the engaged-retracted state between the curved portion 32C and the rotating portion 32D.

[0056] Furthermore, depending on the purpose, only one of the frame-side projection 138A and the opposite-side projection 138B may be provided.

[0057] In the above embodiment, a sliding screen 20 that can slide along a rail in the X direction was used as a closing device, but the present invention is not limited thereto. For example, the opening 10X of the sash 10 may be opened and closed using a pivot shaft that penetrates the upper edge 11 and lower edge 12 of the sash 10 and a door that is rotatably mounted relative to the pivot shaft. In this case, the door may be used as a closing device.

[0058] In the above embodiment, the gap between the sash 10 and the shoji screen 20, that is, the gap between the sash 10 and the shoji screen 20 positioned on the upper rail 12U, and the gap between the sash 10 and the shoji screen 20 positioned on the lower rail 12L, was switched between a covered state (Figure 2) and a retracted cover state (Figure 3(A)) using one cover plate 31. However, the present invention is not limited to this, and multiple cover plates 31 may be used. The gap between the sash 10 and the shoji screen 20 positioned on the upper rail 12U (hereinafter referred to as the "upper side gap") may be switched between a covered state (Figure 2) and a retracted cover state (Figure 3(A)) using the upper side cover plate 31, and the gap between the sash 10 and the shoji screen 20 positioned on the lower rail 12L (hereinafter referred to as the "lower side gap") may be switched between a covered state (Figure 2) and a retracted cover state (Figure 3(A)) using the lower side cover plate 31. In this case, it is preferable that the edge of the upper cover plate 31 or the lateral shielding plate 36 provided thereon engages with either the sash 10 or the sliding screen 20 positioned on the upper rail 12U. This allows the respective cover plates 31 to be brought closer to the upper and lower gaps in the Y direction, thereby further improving watertightness. Furthermore, by placing the upper cover plate 31 in the covered state (Figure 2), it is possible to close the upper gap and restrict the opening and closing of the sliding screen 20 positioned on the lower rail 12L. When opening the sliding screen 20 positioned on the lower rail 12L, the sliding screen 20 positioned on the upper rail 12U is opened, and the upper cover plate 31 is switched from the covered state (Figure 2) to the retracted cover state (Figure 3(A)).

[0059] In the above embodiment, one protrusion 32B and one rotating part 32D are provided, but the present invention is not limited thereto, and multiple protrusions 32B and rotating parts 32D may be provided. In this case, pairs of protrusions 32B and rotating parts 32D may be arranged at predetermined intervals in the X direction. It is preferable that the length of the protrusions 32B and rotating parts 32D in the X direction be about the same as the length of the cover plate 31 so that they can cover the gap between each sash 20 and the sash 10. For example, when three pairs of protrusions 32B and rotating parts 32D are provided, it is preferable that the pairs located at both ends in the X direction face one side 13 and the other side 14 directly.

[0060] Furthermore, when multiple pairs of protrusions 32B and rotating parts 32D are provided, outer protrusions 32CT and inner protrusions 32DT may be provided for all pairs, or outer protrusions 32CT and inner protrusions 32DT may be provided for at least one pair.

[0061] In the above embodiment, a rail mechanism 33B is provided on the upper surface of the drip plate 33 (Figure 2), but the present invention is not limited thereto. For example, the rail mechanism 33B may be provided in a recess provided on the upper surface of the drip plate 33, and the mounting plate 32A may be engaged with the rail mechanism 33B. The depth of the recess may be such that it can accommodate the rail mechanism 33B and the mounting plate 32A, or it may be such that it can accommodate the entire hinge unit 32.

[0062] In the above embodiment, a mounting plate 32A is provided on the upper surface of the drain plate 33, but the present invention is not limited thereto, and a protruding ridge 32B may be provided from the upper surface of the drain plate 33. This makes it possible to omit the mounting plate 32A and the rail mechanism 33B.

[0063] In the above embodiment, a water-draining plate 33 was used as the cover member support structure, but the present invention is not limited thereto. For example, a gutter block may be used, which is positioned from the lower edge 12 of the sash 10 toward the outdoor space. In this case, the tops of both sides of the groove formed in the gutter block function as the cover member support structure.

[0064] In the above embodiment, when the cover is retracted (Figure 3(A)), a slip-preventing material may be formed on the upper surface of the cover plate 31.

[0065] It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. [Explanation of symbols]

[0066] 2. Joinery 10 sashes 10X aperture 11 Upper part 12 Lower part 12L Lower rail 12U Upper Rail 13 One side 14 Other side 20 Shoji 21 Plate 21Y Wheel housing hole 22 wheels 22X wheel groove 23 Wheel axle 30 Cover Units 31 Cover plate 32 Hinge Units 32A Mounting plate 32B Convex strip 32C Curved section 32CG Radial outer surface 32CT Lateral process 32D Rotating part 32DN radial inner surface 32DT inner protrusion 32E Retaining part 32F Cover plate connection section 32L Locking section 33 Drainboard 33A Drain Plate Body 33B Rail mechanism 36 Posture maintenance board 38 Inflow prevention mechanism 39. Containment structure 133 Stile 138A Frame side protrusion 138B Convex part on the opposite side 139 Receiving recess AX center axis CL1 interval CL2 interval R1 radius R2 radius W1 Wall WX opening

Claims

1. A cover member capable of covering the gap between a sash, a closing device provided in an opening formed in the sash and capable of closing the opening, The device includes a switching member that allows switching between a covered state that covers the gap and a retracted state in which the cover member is retracted from the covered state, The cover unit is characterized in that the closing device can be switched between a closed state that closes the opening and an open state that opens the gap.

2. The cover unit according to claim 1, characterized in that it comprises a cover member support structure capable of supporting the cover member in the retracted state.

3. The cover member is provided with a protrusion on the surface facing the cover member support structure when the cover is retracted, The cover member support structure includes a recess capable of accommodating the protrusion when the cover member is in the retracted position. The cover unit according to claim 2, characterized in that when the cover member is in the retracted position, the protrusion blocks the gap between the cover member and the cover member support structure.

4. The cover member is provided with a protrusion on the surface facing the cover member support structure when the cover is retracted, The cover unit according to claim 2, characterized in that when the cover member is in the cover state, the protrusion extends upward or away from the sash.

5. The system further includes a lateral shielding plate that closes the gap between the cover member in the covered state and the sash, The cover unit according to claim 1, characterized in that the lateral shielding plate protrudes from the cover member toward the sash when in the covered state.

6. The aforementioned switching member is A first switching section provided in the sash or the cover member support structure, The cover member is provided with a second switching part that is capable of engaging with the first switching part, Of the first switching unit and the second switching unit, one is rotatable relative to the other. The cover unit according to any one of claims 1 to 5, characterized in that the cover member can be switched between the covered state and the retracted cover state by a rotational movement between the first switching unit and the second switching unit.

7. The first switching section is provided with first protrusions arranged at predetermined intervals in the rotational direction, The second switching section is provided with second protrusions arranged at predetermined intervals in the rotational direction, The cover unit according to claim 6, characterized in that rotational movement between the first switching part and the second switching part is restricted when the first projection is engaged with the second projection.

8. The first projection is switchable between an engaged state in which it engages with the second projection and an engaged-retracted state in which it retracts from the engaged state. The cover unit according to claim 7, characterized in that rotational movement between the first switching part and the second switching part is possible when the engagement retracted state is in place.

9. The cover unit according to any one of claims 1 to 5, characterized in that the cover member support structure includes a drip plate positioned on the outdoor space side with respect to the sash.

10. The cover unit according to claim 9, characterized in that the first switching portion is provided so as to protrude from the drain plate.

11. The cover member support structure comprises a frame positioned on the indoor space side with respect to the sash, The cover unit according to any one of claims 1 to 5, characterized in that the first switching portion is provided so as to protrude from the sash.

12. A cover unit according to any one of claims 1 to 5, The aforementioned sash and, A building fixture characterized by comprising the aforementioned closing device.

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