Glass unit anti-detachment mechanism
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- ALMETAX MFG
- Filing Date
- 2025-06-26
- Publication Date
- 2026-08-03
Smart Images
Figure 0007899414000001_ABST
Abstract
Description
Technical Field
[0001] The invention disclosed in the present application relates to a structure for preventing the glass unit from coming off, which is applied between the peripheral edge of a glass unit and a frame body in a fitting such as a window sash in which the glass unit is housed inside the frame body.
Background Art
[0002] In a fitting in which a glass unit made of multilayer glass or the like is housed within the opening surface of a frame body (including the frame member in a flush window, the same shall apply hereinafter), even when exposed to the heat of a fire, the frame body shall not deform or melt and flames shall not spout from one side to the other between the inside and outside of the building, and the glass unit shall not easily fall off, and thus it is necessary to have fireproof performance.
[0003] In an aluminum alloy window sash, a frame member (including the frame member in a flush window, the same shall apply hereinafter) having a substantially U-shaped cross section surrounds the four sides of the glass unit, and the glass unit can be held within the opening surface by screw-joining the corner portions where these frame members abut against each other. On the other hand, in a synthetic resin window sash, the frame members are assembled into a rectangle in advance and the corner portions are welded and joined, and after the glass unit is housed in a direction perpendicular to the opening surface from the indoor side or the outdoor side, an edge is often attached to the frame member to press the peripheral edge of the glass unit, and such an assembly structure is often adopted. Patent Documents 1 to 8 and the like disclose a structure for preventing the glass unit from coming off, which is applied to a synthetic resin window sash adopting such an assembly structure.
[0004] The glass unit retention structures disclosed in these documents basically consist of fixing a first glass unit retaining bracket at multiple appropriate intervals to the recessed or exposed portion of each frame member constituting the four sides of the frame (on the indoor side when the glass unit is installed from the outdoor side, and on the outdoor side when it is installed from the indoor side) by screws or the like at the recessed portion or exposed portion of each frame member constituting the four sides of the frame, and attaching a setting block that serves as a support base for the glass unit to the recessed portion of the frame member, then installing the glass unit into the opening surface of the frame from the front side (opposite the aforementioned recessed portion) with the peripheral edge of the glass unit along the setting block, and then attaching a second glass unit retaining bracket from the front side so as to connect with the first glass unit retaining bracket, thereby holding the peripheral edge of the glass unit in place by sandwiching it in the groove formed by both retaining brackets. [Prior art documents] [Patent Documents]
[0005] [Patent Document 1] Japanese Patent Publication No. 2010-248837 [Patent Document 2] Japanese Patent Publication No. 2012-140785 [Patent Document 3] Japanese Patent Publication No. 2016-023529 [Patent Document 4] Japanese Patent Publication No. 2017-218870 [Patent Document 5] Japanese Patent Publication No. 2019-065559 [Patent Document 6] Japanese Patent Publication No. 2019-085834 [Patent Document 7] Japanese Patent Publication No. 2019-127768 [Patent Document 8] Japanese Patent Publication No. 2021-161606 [Overview of the project] [Problems that the invention aims to solve]
[0006] The glass unit retention structures disclosed in the aforementioned Patent Documents 1 to 8 all employ a joining method that uses two types of components: a first glass unit retaining bracket fixed to the rear side of the frame material (hereinafter referred to as the "receiving bracket" in this specification) and a second glass unit retaining bracket attached from the front side after the glass unit has been installed (hereinafter referred to as the "retaining bracket" in this specification). These components are joined in the narrow space between the frame material and the glass unit. Furthermore, the joining method involves cutting and raising an inclined piece on one of the overlapping parts of the receiving bracket and the retaining bracket, and forming a notch on the other. When the retaining bracket is fitted into the receiving bracket, the inclined piece catches on the notch, and the two brackets are joined together. With this joining method, once the retaining bracket is fitted into the receiving bracket, the two brackets cannot be removed. For example, if the glass unit breaks after installation, it becomes difficult to remove the retaining bracket and replace the glass unit.
[0007] The invention disclosed herein was conceived in light of these circumstances, and aims to provide a glass unit retention structure that does not involve joining two types of metal fittings in a narrow space, but rather uses only one type of metal fitting to suitably hold the glass unit, allows the fitting to be easily attached to the frame material, and allows the glass unit to be removed by separating the fitting from the frame if necessary, such as for glass replacement, even after installation. [Means for solving the problem]
[0008] To achieve the aforementioned objective, the glass unit retention structure of the present invention disclosed herein is a glass unit retention structure in which a glass unit is placed from either the indoor or outdoor side within the opening surface of a frame body formed by assembling frame members around all four sides, and the peripheral edge of the glass unit is held in place by being sandwiched between glass retaining fittings fixed to each of the frame members, wherein the frame members are perpendicular to the opening surface of the frame body and the space in which the glass unit is placed The inner circumferential surface has a stepped shape and is formed by a recessed portion defining the outer edge, a rear visible portion extending perpendicularly from either the indoor or outdoor side of the recessed portion toward the inside of the opening surface of the frame, and a front visible portion extending perpendicularly from one side of the recessed portion toward the outside of the opening surface of the frame, with a setting block attached to the appropriate place in the recessed portion, and the glass holding fitting has a bottom plate portion that is placed on top of the recessed portion of the frame material. The frame has, and is formed by the bottom plate portion, the rear vertical portion and the front vertical portion being continuous in a groove shape when viewed from the side. The basic configuration is such that the depth of the glass holding portion is set to be greater than the thickness of the setting block, the glass holding fitting which has the glass holding portion placed over the periphery of the glass unit, has the bottom plate portion in contact with the recessed portion of the frame material, and the screw fixing piece portion overlaps the front visible portion of the frame material, and is detachably fixed to the frame material by fixing screws inserted through screw insertion holes formed in the screw fixing piece portion.
[0009] Furthermore, the glass unit retention structure of the invention disclosed herein employs an additional configuration in which a hollow portion is formed on the outside of the corner portion where the recessed portion and the front visible portion of the frame material connect, a metal reinforcing material having a screw receiving piece that overlaps the back side of the front visible portion is inserted into the hollow portion, and the glass retaining fitting is fixed to the frame material by screwing the fixing screws into female screw holes formed in the screw receiving piece.
[0010] In addition to this configuration, a fixing notch is formed in the front visible portion of the frame material, corresponding to the mounting position of the glass retaining bracket, to accommodate the screw fixing piece. The screw fixing piece can then be directly screwed to the screw receiving piece of the metal reinforcing material that is exposed facing the fixing notch.
[0011] Furthermore, the glass unit retaining structure of the invention disclosed herein employs an additional configuration in which an overhanging edge portion is formed on the outer peripheral edge of the opening surface of the front visible portion of the frame material, a recessed groove portion is formed at the connection point between the front visible portion and the overhanging edge portion, and the front upright portion of the glass retaining fitting is concealed by the recessed groove portion. [Effects of the Invention]
[0012] As described above, the glass unit retention structure allows the glass unit to be held in place without falling out simply by placing the glass retaining part, formed on a single type of glass retaining bracket, over the periphery of the glass unit. The glass retaining bracket can be easily fixed to the frame by screwing it to the front visible part of the frame material from the side where the glass unit is housed, thus greatly improving the ease of installation of the joinery.
[0013] Furthermore, even after installation, if glass replacement or other changes are necessary, the glass unit can be removed by detaching the glass retaining brackets from the frame by removing the fixing screws that secure the glass retaining brackets. [Brief explanation of the drawing]
[0014] [Figure 1] It is a front view of the outdoor side of a vertically sliding window to which the anti-disengagement structure of the glass unit disclosed in the present application is applied. [Figure 2] Similarly, it is a front view of the indoor side of the vertically sliding window. [Figure 3] It is a longitudinal sectional view of the vertically sliding window shown in FIGS. 1 and 2 with the middle part omitted. [Figure 4] Similarly, it is a transverse sectional view of the vertically sliding window shown in FIGS. 1 and 2 with the middle part omitted. [Figure 5] It is a perspective view of a glass holding fitting used for the anti-disengagement structure of a glass unit according to an embodiment of the invention disclosed in the present application. [Figure 6] It is a perspective view for explaining the construction procedure of fitting a glass unit into a frame member using the glass holding fitting of FIG. 5 in three steps (a) to (c). [Figure 7] It is an enlarged sectional view of the lower side portion in the state of FIG. 6(a). [Figure 8] It is an enlarged sectional view of the lower side portion in the state of FIG. 6(b). [Figure 9] It is an enlarged sectional view of the lower side portion in the state of FIG. 6(c). [Figure 10] It is a front view of the outdoor side of the lower side portion in the state of FIG. 6(b). [Figure 11] It is a side view showing a modified example of the glass holding fitting.
Embodiments for Carrying Out the Invention
[0015] The embodiments of the invention disclosed herein will be described below with reference to the drawings. The glass unit retention structure disclosed herein is intended to be applied to the joint between the frame of a sliding door and the glass unit in building fixtures such as window sashes and doors with windows to which openable and closable sliding doors are assembled, but the method of opening and closing the sliding door is not particularly limited. Furthermore, although this glass unit retention structure is intended to be applied to building fixtures that use frame materials made of synthetic resin, it can also be applied to composite sashes and the like that which combine frame materials made of synthetic resin and metal. In addition, this glass unit retention structure can be applied not only to the frame of a sliding door but also to the frame of a fixed window, in which case it can be implemented in the same way by reading "frame / frame material" as "frame / frame material".
[0016] [Basic structure of joinery] Figures 1 to 4 show an example of a joinery to which this glass unit anti-detachment structure is applied. The example joinery is a vertical sliding window in which a sash 2 assembled on a vertically elongated rectangular frame 1 is opened and closed to the outside by operating an opening / closing device (operator handle) 9 attached to the lower frame material 10 from the inside.
[0017] The frame members 10 that make up the four sides of the frame body 1 are all extruded materials made of synthetic resin. The frame members 10 on all four sides have a common cross-sectional shape, and the ends that are cut at a 45-degree angle are butted together in a mitered joint and welded to form a rectangle.
[0018] Similarly, the top, bottom, left, and right frame members 30 that make up the frame body 3 of the shoji screen 2 are also extruded materials made of synthetic resin. The frame members 30 on all four sides have a common cross-sectional shape, and these are also joined by welding together the ends that have been cut at a 45-degree angle in a mitered joint.
[0019] As shown in an enlarged view in Figure 7, the frame material 30 has an inner circumferential surface that is continuous in a stepped manner toward the outdoors, with the distance between opposing sides widening, and includes a recessed portion 31 that defines the outer edge of the space in which the glass unit 4 is housed, perpendicular to the opening surface of the frame body 3; a rear facing portion 32 that extends perpendicularly to the recessed portion 31 and toward the inside of the opening surface from the rear side of the recessed portion 31 (indoor side in the exemplary embodiment); and a front facing portion 33 that extends perpendicularly to the recessed portion 31 and toward the outside of the opening surface from the front side of the recessed portion 31 (outdoor side in the exemplary embodiment). On the outside of these inner circumferential surfaces (outside the opening surface or on the rear side), there are multiple hollow portions 34 and 35 that are continuous in the length direction of the frame material 30, and multiple partition wall members that surround them. However, the invention disclosed in this application is not particularly limited in terms of the shape of the partition member, etc., that extends to the outside of the aforementioned inner circumferential surface (the visible portion 31, the rear visible portion 32, and the front visible portion 33).
[0020] Setting blocks 21 are attached to the recessed portion 31 of the frame material 30 that constitutes the lower edge and the left and right vertical edges, in order to secure a predetermined clearance between them and the glass unit 4. The setting blocks 21 are roughly rectangular parallelepipeds and are placed at appropriate intervals in the recessed portion 31 of each frame material 30 (positions that do not interfere with the glass holding fittings 5 described later). These setting blocks 21 are attached to the recessed portion 31 of the frame material 30 using, for example, double-sided tape or adhesive. In addition, a rear bead material 38 is attached to the inner peripheral edge of the opening surface at the rear visible portion 32 to seal the gap between the glass unit 4 and the frame material 30.
[0021] A roughly rectangular hollow section 34 is formed on the outside of the corner portion where the recessed section 31 and the front visible section 33 connect in an L-shape in cross-section. A metal reinforcing material 23, which will serve as the fixing base for the glass retaining bracket 5 described later, is inserted into this hollow section 34. This metal reinforcing material 23 has screw receiving pieces 24 that overlap at least on the back side of the front visible section 33 and is arranged over substantially the entire length of the frame material 30.
[0022] An overhanging edge portion 36 is formed on the outer edge of the opening surface of the front visible portion 33, extending further forward to close the gap with the frame 1. At the connection point between the front visible portion 33 and the overhanging edge portion 36, a recessed groove portion 37 is provided, opening to the inside of the opening surface, for attaching the push-edge 22 after the glass unit 4 is placed in the frame 3.
[0023] In the example embodiment, the glass unit 4 employs three layers of fire-resistant glass. This fire-resistant glass is formed, for example, by sandwiching a heat-resistant tempered glass plate 41, positioned in the center in the thickness direction, between non-heat-resistant glass plates 42 and 43 positioned on either side of it. Spacers 44 and 45 are interposed around the entire circumference between the periphery of the heat-resistant tempered glass plate 41 and the periphery of the non-heat-resistant glass plates 42 and 43. These spacers 44 and 45 are bonded to the heat-resistant tempered glass plate 41 and the non-heat-resistant glass plates 42 and 43 via sealing members (not shown), thereby sealing the inner and outer layers of space sandwiched between the heat-resistant tempered glass plate 41 and the non-heat-resistant glass plates 42 and 43.
[0024] Furthermore, the invention disclosed herein does not limit the type or lamination configuration of the glass plates constituting the glass unit 4, and is applicable to single-layer, double-layer, or four-layer or more glass units 4. In addition, as a measure against thermal cracking of the glass plates in the event of a fire, a highly thermally conductive metal tape may be attached to the periphery of the glass unit 4, or a cover member made of a thin metal plate may be fitted.
[0025] Such a glass unit 4 is fitted into the opening surface of a frame 3 that has been pre-assembled on all four sides, from either the outdoor or indoor side in a direction perpendicular to the surface, and is held within the opening surface of the frame 3 via a glass retaining fitting 5, which will be described later. At this time, a clearance equivalent to the thickness S of the setting block 21 is secured between the bottom edge and the frame material 30 of the left and right vertical edges. Then, a trim 22 is attached to the frame 3 from the same side as the side in which the glass unit 4 is fitted, and the peripheral edge of the glass unit 4 is hidden. The shoji screen 2 in the example form is an "external trim structure" in which the glass unit 4 is fitted and the trim 22 is attached from the outdoor side. However, this glass unit retention structure can also be applied to a shoji screen 2 with an "internal trim structure" in which the glass unit 4 is fitted into the frame 3 from the indoor side and the trim 22 is attached, by reversing the indoor / outdoor direction.
[0026] In this specification, when describing the positional relationships and directions of operation of parts and components, the viewpoint shown in Figure 1, viewed from the side where the glass unit 4 is housed in the frame 3 (the "one side" in the claims / the outdoor side in the exemplary embodiment), is used as the reference point to specify the vertical direction (or height direction) and the horizontal direction (or opening width direction). Furthermore, the central side of the opening surface of the frame 3 is referred to as the inside of the opening surface or inward side, and the outer periphery side (wall side) is referred to as the outside of the opening surface or outward side. In addition, the indoor / outdoor direction perpendicular to the opening surface of the frame 3 is referred to as the depth direction (or projection direction), and in that depth direction, the side where the glass unit 4 is housed in the frame 3 is referred to as the front side, and the opposite side (the "other side" in the claims / the indoor side in the exemplary embodiment) is referred to as the back side.
[0027] The essential part of the present invention lies in the arrangement of the glass retaining bracket 5, which is installed between the frame material 30 and the glass unit 4. Figure 5 shows one embodiment of the glass retaining bracket 5, and Figures 6 to 10 show the installation procedure using the glass retaining bracket 5 of Figure 5. Although Figures 6 to 10 show the arrangement of the glass retaining bracket 5 on the lower edge of the frame material 30, the arrangement of the glass retaining bracket 5 is basically the same for all four sides of the frame material 30, so the explanation below will focus on the arrangement on the lower edge.
[0028] The illustrated glass retaining bracket 5 is formed by punching and bending a single metal plate, such as a stainless steel plate. Preferably, the metal plate has sufficient rigidity to not easily deform during and after installation. The glass retaining bracket 5 has a shape in which a groove shape is continuous when viewed from the side, and the inside of the groove-shaped portion forms the glass retaining portion.
[0029] The bottom plate portion 51 is a flat, rectangular section in plan view that extends along the length direction (opening width direction) of the frame material 30. The rear vertical portion 52 and the front vertical portion 53 are also flat, rectangular sections in front view that extend along the length direction of the frame material 30. The corners of the rear vertical portion 52 and the front vertical portion 53 that protrude inward from the opening surface are rounded into an arc shape. The rear vertical portion 52 and the front vertical portion 53 face each other parallel to one another, with their overhang heights being approximately the same. The distance between the rear vertical portion 52 and the front vertical portion 53 is set to be slightly larger (approximately 1-3 mm) than the thickness G of the glass unit 4. The overhang heights H of the rear vertical section 52 and the front vertical section 53 do not necessarily have to be exactly the same, but each is set to be at least a few millimeters (approximately 5 mm) larger than the thickness S of the setting block 21, and slightly smaller than the overhang height D of the rear visible section 32 of the frame material 30, so as not to interfere with the rear bead material 38 after construction.
[0030] In the example configuration, the width of the bottom plate portion 51 and the width of the rear vertical portion 52 are aligned along the length direction (opening width direction) of the frame material 30, but they may be different. In the example configuration, the width of the front vertical portion 53 is formed to be smaller than the width of the bottom plate portion 51, and the front vertical portion 53 is connected to the middle portion of the bottom plate portion 51 in the width direction. On both sides of the front vertical portion 53, screw fixing pieces 54 are formed by bending a plate piece extending from the front edge of the bottom plate portion 51 outwards from the opening surface so as to be perpendicular to the bottom plate portion 51. The pair of left and right screw fixing pieces 54 have substantially the same shape, and each has one screw insertion hole 55. The folded height V of the screw fixing piece 54 is set to be substantially the same as the thickness S of the setting block 21 (S ± 1 to 3 mm). Furthermore, the screw fixing piece 54 can also be formed by cutting out the middle portion of the front upright portion 53 in the lateral direction, rather than on both sides of the front upright portion 53, and then bending the cut-out portion to the opposite side from the front upright portion 53.
[0031] The procedure for assembling the glass unit 4 to the frame 3 using the glass retaining bracket 5 configured in this way will be explained with reference to Figures 6 to 10. First, the glass retaining bracket 5 is temporarily fixed to the periphery of the glass unit 4 by placing the groove-shaped glass retaining portion, which is surrounded by the bottom plate portion 51, the rear vertical portion 52, and the front vertical portion 53 of the glass retaining bracket 5, over the periphery of the glass unit 4. At this time, all screw fixing pieces 54 should face the same side (outdoor side), and the glass retaining bracket 5 should be moved towards the center of the glass unit 4 so that the bottom plate portion 51 abuts against the glass unit 4. In order to maintain the temporary fixing state, the front vertical portion 53 of the glass retaining bracket 5 may be attached to the surface of the glass unit 4 with masking tape or the like.
[0032] Alternatively, as shown in Figure 11, the front vertical portion 53 of the glass retaining bracket 5 can be bent into a V-shape when viewed from the side, allowing it to bend and deform, and the glass unit 4 can be elastically fitted between this front vertical portion 53 and the rear vertical portion 52.
[0033] As shown in Figure 1, the glass retaining brackets 5 are placed at appropriate intervals, one or more times, on the top, bottom, left, and right edges of the glass unit 4. This can also be done, for example, with the glass unit 4 placed horizontally. In that case, the screw fixing piece 54 should face upwards.
[0034] Then, the glass unit 4 is placed perpendicular to the opening surface of the frame 3, from the front side (the outdoor side of the frame 3) together with the glass retaining bracket 5. The setting block 21 is positioned so as not to interfere with the glass retaining bracket 5 at this time. The state in Figures 6(a) and 7, where the glass unit 4 is placed inside the opening surface of the frame 3 with the setting block 21 in place, and the rear vertical portion 52 of the glass retaining bracket 5 is close to or in contact with the rear visible portion 32 of the frame material 30, is the temporary placement state of the glass unit 4.
[0035] Once the glass unit 4 is temporarily placed within the opening surface of the frame 3, each glass retaining fitting 5 is slid outward from the opening surface so that the bottom plate portion 51 of the glass retaining fitting 5 contacts the recess portion 31 of the frame material 30. In the exemplary embodiment, at this time the screw fixing piece portion 54 of the glass retaining fitting 5 is configured to fit into a fixing notch 39 that has been formed in advance in the frame material 30. The fixing notch 39 is formed by cutting out the front visible portion 33 of the frame material 30 to a width slightly wider than the screw fixing piece portion 54, in accordance with the mounting position of the glass retaining fitting 5, so that the screw receiving piece 24 of the metal reinforcing material 23 inserted into the hollow portion 34 is partially exposed to the outside. The screw receiving piece 24 exposed facing the fixing notch 39 has a female screw hole 25 into which a fixing screw 71 can be screwed.
[0036] As shown in Figures 6(b), 8, and 10, each glass retaining bracket 5 is slid outward from the opening surface, the screw fixing piece 54 is inserted into the fixing notch 39 of the frame material 30, and the fixing screw 71 is inserted from the outside into the screw insertion hole 55 and screwed into the female screw hole 25 of the metal reinforcing material 23, thereby fixing the glass retaining bracket 5 to the frame material 30 via the metal reinforcing material 23. At this time, the overhang height (depth of the glass retaining part) H of the rear vertical part 52 and the front vertical part 53 of the glass retaining bracket 5 is set to be sufficiently larger than the thickness S of the setting block 21. As a result, the rear vertical part 52 and the front vertical part 53 of the glass retaining bracket 5 are fixed so that they overlap the periphery of the glass unit 4 by a height of several mm or more when viewed from the front. In this way, the periphery of the glass unit 4 is swallowed by the glass retaining part of the glass retaining bracket 5 fixed to the frame material 30 and held in place so as not to fall out. This is the assembled state of glass unit 4.
[0037] It is also possible to omit the fixing notch 39 as shown in the example form on the front visible portion 33 of the frame material 30, and instead simply overlap the screw fixing piece 54 of the glass retaining bracket 5 onto the front visible portion 33 of the frame material 30 and fasten it to the metal reinforcing material 23 over the front visible portion 33. The position of the screw fixing piece 54 extending from the front edge of the bottom plate portion 51 of the glass retaining bracket 5 in the indoor / outdoor direction is set appropriately according to the configuration of the connection with the frame material 30.
[0038] Subsequently, as shown in Figures 6(c) and 9, the trim piece 22 is fitted into the groove 37 formed at the connection point between the front visible portion 33 and the protruding edge portion 36 of the frame material 30, completing the assembly of the shoji screen 2. This trim piece 22 is sized to conceal the front upright portion 53 of the glass retaining bracket 5.
[0039] Conventional glass unit retention structures consisted of two components: a receiving bracket fixed to the back of the frame and a retaining bracket attached from the front after the glass unit was installed. These two components were joined together in the narrow space between the glass unit and the frame to sandwich the glass unit, making installation cumbersome. In contrast, the glass unit retention structure disclosed in this application allows the glass unit 4 to be held in place by a simple procedure: a single type of glass retaining bracket 5 is installed together with the glass unit 4 within the opening surface of the frame 3. The glass retaining bracket 5 can be manufactured using only simple punching and bending processes, thus reducing manufacturing costs. The glass retaining bracket 5 is fixed to the frame 30 by screwing it in from the front, making the process extremely simple. As a result, the ease of installation of the joinery is greatly improved. Furthermore, if the glass unit 4 breaks or requires replacement after installation, the glass retaining bracket 5 can be separated from the frame material 30 by removing the trim 22 and then removing the fixing screws 71 from the front side, thereby allowing the glass unit 4 to be removed from the frame body 3.
[0040] The glass unit retention structure disclosed in this application has been described above. However, the technical scope of the invention disclosed in this application should not be interpreted restrictively by the exemplary embodiments, but rather conceptually based on the claims. The names of the components used in the claims and specification are for convenience to make the invention easier to understand concretely, and the names do not unnecessarily limit the concept or properties of the components. When implementing the invention disclosed in this application, the detailed shape, dimensions, structure, material, quantity, combination form with other elements, relative positional relationship, etc. of components not specifically identified in the claims may be modified as appropriate, within the scope of using an operating principle substantially equivalent to that of the exemplary form, or within the scope of obtaining an effect substantially equivalent to or better than that of the exemplary form. [Explanation of Symbols]
[0041] 1 frame 10 Frame material 2 Shoji 21 Setting Blocks 22 Pressed edge 23 Metal reinforcement 24 Screw receiving pieces 25 Female screw holes 3 frame 30 Frame material 31 Estimated portion 32 Rear side visible section 33 Front side visible section 34 Hollow part 35 Hollow part 36 Overhang edge 37 Groove 38 Rear bead material 39 Fixing notch 4 Glass Units 41 Heat-resistant tempered glass sheet 42 Non-heat-resistant glass plate 43 Non-heat-resistant glass plate 44 Spacers 45 Spacers 5. Glass retaining bracket 51 Bottom plate part 52 Rear vertical section 53 Front side upright section 54 Screw fixing piece 55 Screw insertion holes 71 Fixing screws 9. Switching device
Claims
1. A glass unit is placed within the opening of a frame body formed by assembling frame members on all four sides, from either the indoor or outdoor side, and the peripheral edge of the glass unit is held in place by glass retaining fittings fixed to each of the frame members, in a structure that prevents the glass unit from coming off. The frame material has an inner surface that is continuous in a stepped manner, comprising a recess that defines the outer edge of the space in which the glass unit is housed, perpendicular to the opening surface of the frame, a rear facing portion that extends perpendicularly from either the indoor or outdoor side of the recess towards the inside of the opening surface of the frame, and a front facing portion that extends perpendicularly from one side of the recess towards the outside of the opening surface of the frame, with setting blocks attached at appropriate locations in the recess. The glass retaining fitting comprises a bottom plate portion that is placed on top of the recessed portion of the frame material, a rear vertical portion that extends perpendicularly from the other edge of the bottom plate portion toward the inside of the opening surface of the frame, a front vertical portion that extends perpendicularly from the one edge of the bottom plate portion toward the inside of the opening surface of the frame, and a screw fixing piece that extends perpendicularly from the one edge of the bottom plate portion toward the outside of the opening surface of the frame, The depth of the glass holding portion, formed by the connection of the bottom plate portion, the rear vertical portion, and the front vertical portion in a groove shape when viewed from the side, is set to be greater than the thickness of the setting block. The glass retaining bracket, with the glass retaining portion placed over the periphery of the glass unit, is detachably fixed to the frame material by fixing screws inserted through screw insertion holes formed in the screw fixing piece, with the bottom plate portion in contact with the recessed portion of the frame material and the screw fixing piece portion overlapping the front visible portion of the frame material. A glass unit retention structure characterized by the following features.
2. In the glass unit retention structure described in claim 1, A hollow portion is formed on the outside of the corner portion where the recessed portion and the front visible portion of the frame material connect. A metal reinforcing material having a screw receiving piece that overlaps the back side of the front visible portion is inserted into the hollow portion. The glass retaining bracket is fixed to the frame material by screwing the fixing screw into the female screw hole formed in the screw receiving piece. A glass unit retention structure characterized by the following features.
3. In the glass unit retention structure described in claim 2, The front visible portion of the frame material has a fixing notch formed therein, which accommodates the screw fixing piece, in accordance with the mounting position of the glass retaining bracket. The screw fixing piece is directly screwed to the screw receiving piece of the metal reinforcing material that is exposed facing the fixing notch. A glass unit retention structure characterized by the following features.
4. In the glass unit retention structure described in claim 1, 2, or 3, An overhanging edge is formed on the outer edge of the opening surface of the front visible portion of the frame material, which extends outwards to one side. A recessed groove is formed at the connection point between the front visible portion and the protruding edge portion for attaching a trim piece. The front vertical portion of the glass retaining bracket is concealed by the pressing edge that fits into the groove. A glass unit retention structure characterized by the following features.