Fire protection face lattice

Abstract

To provide a fire protection face lattice capable of refraining from blocking heat release from a sash window even in the case of a fire with a louver all closed.SOLUTION: A fire protection face lattice 1 includes: a face lattice body 36; and a thermosensible operation device 37 which is engaged with a window frame-side engaging portion 11 to keep the face lattice body 36 at a closed position and releases its engagement with the window frame-side engaging portion 11 to enable a rocking / opening operation on the face lattice body 36 when a prescribed temperature is reached. The thermosensible operation device 37 includes: a pair of slide members 96a, 96b which can be engaged with and disengaged from the window frame-side engaging portion 11 and can be moved in a longitudinal direction; and a drive mechanism 97 which includes an energization member 103 for energizing one slide member 96a and the other slide member 96b respectively and moves the pair of slide members 96a, 96b when the prescribed temperature is reached.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a fire grille installed on the exterior side of a sash window. [Background technology]

[0002] In apartment complexes and other multi-family housing, sash windows are installed facing the common corridors for the purpose of indoor ventilation and lighting. Furthermore, grilles are installed on the exterior side of sash windows facing the common corridors to ensure security and privacy.

[0003] While grilles of various structures have been known for some time, the use of louver grilles with openable louvers, as described in JP 2009-46868 A and elsewhere, has been increasing in recent years because they allow for flexible adjustment of ventilation, light blocking, etc. On the other hand, there has been a demand in recent years for grilles with high fire resistance to prevent the spread of fire. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-46868 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to improve fire prevention performance while ensuring security and privacy, it is effective to design a louvered grille that does not block heat dissipation from the sash window in the event of a fire when the louvers of the grille installed on the exterior side of the sash window are fully closed.

[0006] An object of the present disclosure is to provide a fire grille that does not block heat dissipation from a sash window even when a fire occurs with the louvers fully closed. [Means for solving the problem]

[0007] A fire grille according to one aspect of the present disclosure is installed on the outdoor side of a sash window and comprises a grille body and a heat-sensing activation device.

[0008] The surface grille body is configured in a rectangular frame shape and has a frame body that is swingably supported (pivoted) relative to the lower part of the window frame that constitutes the sash window, and a plurality of louvers supported on the inside of the frame body. The heat-sensing operating device engages with the window frame side engaging portions provided at the top of each of the left and right vertical window frames of the window frame to hold the grille body in a closed position, and when a predetermined temperature is reached, it disengages from the window frame side engaging portions to allow the grille body to swing open.

[0009] The heat-sensing operating device includes a pair of slide members that can be engaged with and disengaged from the left and right window frame side engaging portions and that can move left and right, and a biasing member that applies a biasing force to one of the pair of slide members and the other slide member, respectively, and a drive mechanism that moves the pair of slide members to disengage the pair of slide members from the left and right window frame side engaging portions when the predetermined temperature is reached.

[0010] In a fire grille according to one aspect of the present disclosure, the drive mechanism may include a restricting member that prevents movement of the pair of sliding members until the predetermined temperature is reached, and that releases the restriction on movement of the pair of sliding members when the predetermined temperature is reached. In this case, the restricting member may be configured to include a melting member that melts or melts when the predetermined temperature is reached.

[0011] In the fire grate according to one aspect of the present disclosure, the drive mechanism may further include a heat transfer member disposed in contact with or in proximity to the melting member.

[0012] In the fire grille according to one aspect of the present disclosure, the biasing member can be connected to the pair of slide members via the restricting member. To implement the fire grate according to one aspect of the present disclosure, the biasing member may be directly connected to the pair of sliding members.

[0013] In a fire grille according to one embodiment of the present disclosure, a pair of vertical frames constituting the frame body can each have a first insertion portion that penetrates in the left-right direction and a second insertion portion that penetrates in the indoor-outdoor direction. In this case, when the surface grille body is in a closed state, the end of the slide member inserted into the vertical frame through the first insertion portion can be engaged with the window frame side engagement portion inserted into the vertical frame through the second insertion portion.

[0014] In a fire grille according to one aspect of the present disclosure, the vertical frame may have a reinforcing metal fitting therein that has an insertion portion through which the end of the sliding member can be inserted. In this case, the reinforcing metal fitting can be disposed between the window frame side engaging portion and the vertical stile first insertion portion in the left-right direction when the surface grille body is in a closed state.

[0015] In a fire grille according to one embodiment of the present disclosure, the width dimension in the left-right direction of the second vertical stile insertion portion can be at least twice the thickness dimension in the left-right direction of the window frame side engagement portion.

[0016] In the fire grille according to one aspect of the present disclosure, at least the portions of the outer circumferential surfaces of the pair of slide members that engage with the window frame-side engaging portions can be configured as cylindrical surfaces.

[0017] In a fire grille according to one aspect of the present disclosure, the frame body may have a pair of movement limiting portions that engage with the pair of sliding members and limit the amount of movement of the pair of sliding members.

[0018] In the fire grille according to one aspect of the present disclosure, the biasing member may be formed of an elastic member. In this case, the biasing member can be configured by a tension spring. Alternatively, the biasing member may be made of fire-resistant rubber.

[0019] The fire grille according to one aspect of the present disclosure may further include an angle restriction means for restricting the opening angle of the grille body.

[0020] In this case, the angle restriction means may include a storage case fixed to the frame body, and a wire having one longitudinal end disposed inside the storage case and the other longitudinal end fixed directly or indirectly to the window frame. The storage case may have a case-side stopper, and the wire may have a wire-side stopper portion that engages with the case-side stopper at the one longitudinal end to prevent the one longitudinal end from slipping out of the storage case. [Effects of the Invention]

[0021] According to a fire grille according to one aspect of the present disclosure, even if a fire breaks out with the louvers fully closed, heat dissipation from the sash window is not blocked. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a schematic diagram of a fire grille according to a first embodiment of the present disclosure, viewed from the outdoor side. [Figure 2] FIG. 2 is a vertical cross-sectional view of a fire grille according to a first embodiment of the present disclosure. [Figure 3] FIG. 3 is a cross-sectional view corresponding to the cross section taken along line AA in FIG. [Figure 4] FIG. 4 is a cross-sectional view corresponding to the cross section taken along line BB in FIG. [Figure 5] FIG. 5 is an enlarged view of the upper part of FIG. [Figure 6] FIG. 6 is an enlarged view of the lower part of FIG. [Figure 7] FIG. 7 is an enlarged view of the left part of FIG. [Figure 8] FIG. 8 is an enlarged view of the right part of FIG. [Figure 9] FIG. 9 is an enlarged view of the left part of FIG. [Figure 10] FIG. 10 is an enlarged view of the right part of FIG. [Figure 11] FIG. 11 is a perspective view of a fire grille according to a first embodiment of the present disclosure, viewed from the indoor side, with some components such as a mullion omitted. [Figure 12] FIG. 12 is an enlarged view of the upper right portion of FIG. [Figure 13] FIG. 13 is an enlarged view of the lower right portion of FIG. [Figure 14] FIG. 14 is a perspective view showing a state in which the window-frame-side engaging portion and the sliding member are engaged inside the vertical frame in the first example of the embodiment of the present disclosure. [Figure 15] FIG. 15 is a perspective view showing the upper window frame bracket removed from the fire grille according to the first embodiment of the present disclosure. [Figure 16] FIG. 16 is a perspective view showing the window frame upper bracket of FIG. 15 separated into its component parts. [Figure 17] Figure 17 is an oblique view showing the window frame lower bracket removed from a fire grille according to a first example of an embodiment of the present disclosure, where Figure 17(A) shows the window frame lower bracket on one side in the left-right direction, and Figure 17(B) shows the window frame lower bracket on the other side in the left-right direction. [Figure 18] FIG. 18 is a perspective view showing the window frame lower bracket of FIG. 17(A) separated into its component parts. [Figure 19] FIG. 19 is an enlarged view of the upper left portion of FIG. [Figure 20] Figure 20 is a schematic diagram of the first example of an embodiment of the present disclosure, viewed from the indoor side, showing an upper extension portion equipped with a window frame side engagement portion inserted into a vertical stile second insertion portion provided on a vertical stile. [Figure 21] FIG. 21 is a perspective view showing an assembly of louvers and a crankshaft that constitute a fire grille according to a first embodiment of the present disclosure. [Figure 22]FIG. 22(A) is an end view showing a louver constituting a fire grille according to a first embodiment of the present disclosure, and FIG. 22(B) is a partially enlarged view of FIG. 22(A). [Figure 23] Figure 23 is an oblique view of a fire grille according to a first example of an embodiment of the present disclosure, omitting the frame body and showing the engagement between the slide member and the window frame side engagement portion, and the engagement between the louver base and the stopper portion. [Figure 24] FIG. 24(A) is a diagram showing a crankshaft that constitutes a fire grille according to a first embodiment of the present disclosure, and FIG. 24(B) is a partially enlarged view of FIG. 24(A). [Figure 25] FIG. 25 is a perspective view shown to explain a manufacturing process of a crankshaft that constitutes a fire grille according to a first embodiment of the present disclosure. [Figure 26] FIG. 26 is a perspective view showing a process of inserting the insertion shaft portion of the crankshaft into the insertion hole of the louver in the fire grille according to the first embodiment of the present disclosure. [Figure 27] Figure 27 is an oblique view of a fire grille according to a first example of an embodiment of the present disclosure, showing a pair of louvers arranged on both the left and right sides of a central mullion connected by a connecting shaft, with the central mullion omitted. [Figure 28] FIG. 28(A) is a diagram showing a connecting shaft constituting a fire grille according to a first embodiment of the present disclosure, and FIG. 28(B) is a partially enlarged view of FIG. 28(A). [Figure 29] FIG. 29 is a perspective view shown to explain a manufacturing process of a connecting shaft constituting a fire grille according to a first embodiment of the present disclosure. [Figure 30] FIG. 30 is a perspective view showing a process of inserting the connecting insertion shaft portion of the connecting shaft into the insertion hole of the louver in the fire grille according to the first embodiment of the present disclosure. [Figure 31] Figure 31 is an oblique view showing the opening and closing operation of the louvers based on lever operation for a fire grille according to a first example of an embodiment of the present disclosure, where Figure 31(A) shows the louvers in a closed state and Figure 31(B) shows the louvers in an open state. [Figure 32] Figure 32 is a side view of the lever and its surrounding components shown to explain the opening and closing operation of the louvers based on lever operation for a fire grille according to a first example of an embodiment of the present disclosure, where Figure 32(A) shows the louvers in a closed state and Figure 32(B) shows the louvers in an open state. [Figure 33] Figure 33 is an oblique view of the top of a fire grille according to a first example embodiment of the present disclosure, viewed from the outdoor side, where Figure 33(A) shows the normal state before the heat-sensing activation device is activated, and Figure 33(B) shows the state after the heat-sensing activation device has been activated. [Figure 34] Figure 34 is a cross-sectional view of a heat-sensing activation device that constitutes a fire grille according to a first example of an embodiment of the present disclosure, viewed from the indoor side, where Figure 34(A) shows the state before activation and Figure 34(B) shows the state after activation. [Figure 35] Figure 35 is an oblique view of a heat-sensing activation device constituting a fire grille according to a first example of an embodiment of the present disclosure, with the casing omitted, viewed from the indoor side, where Figure 35(A) shows the state before activation and Figure 35(B) shows the state after activation. [Figure 36] FIG. 36 is a view corresponding to FIG. 35, showing another example of a heat-sensing actuator constituting a fire grille according to the first embodiment of the present disclosure. [Figure 37] FIG. 37 is a perspective view of a heat transfer member and a part of a casing taken out of a heat sensing actuator constituting a fire grille according to a first embodiment of the present disclosure, viewed from the outdoor side. [Figure 38] Figure 38 is a cross-sectional view of a heat-sensing operating device equipped with another example of a heat transfer member for a fire grille according to a first example embodiment of the present disclosure, viewed from the indoor side, corresponding to Figure 34. [Figure 39] FIG. 39 is a perspective view showing a storage case for an angle restriction means constituting a fire grille according to a first embodiment of the present disclosure. [Figure 40]Figure 40 is a side view showing the angle control means constituting the fire grille according to the first example of an embodiment of the present disclosure, where Figure 40(A) shows the state in which the fire grille is held in the closed position, and Figure 40(B) shows the state after the fire grille has swung open. [Figure 41] Figure 41 is a longitudinal cross-sectional view showing an example of the change in posture of a fire grille and the opening operation of louvers in the event of a fire in a first example of an embodiment of the present disclosure, in chronological order from Figure 41(A) to Figure 41(B). [Figure 42] Figure 42 is a partial vertical cross-sectional view showing the operation of the components of the louver opening and closing mechanism in the event of a fire in a first example of an embodiment of the present disclosure, in chronological order from Figure 42(A) to Figure 42(B). [Figure 43] Figure 43 is a perspective view showing, in chronological order in the order of Figure 43(A), Figure 43(B), and Figure 43(C), how the engagement between the louver base and the stopper portion is released and the louvers are opened in the event of a fire in a fire grille according to a first example of an embodiment of the present disclosure. [Figure 44] Figure 44 is a side view showing, in chronological order from Figure 44(A) to Figure 44(B), the changes in the lever and its surrounding components when the engagement between the louver base and the stopper portion is released and the louvers are opened in the event of a fire, in relation to a fire grille according to a first example of an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0023] [Example 1] A first example of an embodiment of the present disclosure will be described with reference to FIGS.

[0024] The fire grille 1 in this example is installed on the outdoor side of a sash window 2 that is installed facing a common corridor in an apartment building, for example, and has the function of automatically swinging open in the event of a fire, so as not to impede heat dissipation from the sash window 2. Below, the structure of the sash window 2 will be explained, followed by the structure of the fire grille 1.

[0025] In the following explanation, the terms "up-down" and "left-right" refer to the directions when viewing the fire grille 1 and sash window 2 from the front. Therefore, the "up-down" direction corresponds to the height of the fire grille 1 and sash window 2, and the "left-right" direction corresponds to the width of the fire grille 1 and sash window 2. Furthermore, the "inside" side in the left-right direction refers to the center of the width of the fire grille 1 and sash window 2, and the "outside" side in the left-right direction refers to the outside of the width of the fire grille 1 and sash window 2. Furthermore, the "indoor-outdoor" direction refers to the depth direction (outside-of-plane direction, thickness direction) of the fire grille 1 and sash window 2. Unless otherwise specified, each direction refers to the direction when the fire grille 1 and sash window 2 are installed in a building such as an apartment building.

[0026] [Sash window] In this example, the sash window 2 comprises a window frame 3, and an inner shoji screen 4 and an outer shoji screen 5 that are set inside the window frame 3.

[0027] <window frame> The window frame 3 is configured as a rectangular frame (a square frame with right-angled corners) and includes an upper window frame 6, a lower window frame 7, and a pair of left and right vertical window frames 8a, 8b. The upper window frame 6, lower window frame 7, and vertical window frames 8a, 8b are each made of an aluminum alloy.

[0028] The window frame 3 in this example further includes a pair of upper window frame brackets 9a, 9b and a pair of lower window frame brackets 10a, 10b to install the fire grille 1 on the outdoor side of the sash window 2 so that it can be swung open.

[0029] The upper window frame brackets 9a, 9b work in conjunction with the heat-sensing operating device 37 (described later) provided on the fire grille 1 to hold the fire grille 1 in a closed position under normal conditions, and to allow the fire grille 1 to swing open in the event of a fire.

[0030] The window frame lower brackets 10a, 10b serve to support the fire grille 1 so that it can swing open relative to the lower part of the window frame 3 in the event of a fire, like a so-called outward-opening window.

[0031] In this example, the window frame upper brackets 9a, 9b and the window frame lower brackets 10a, 10b are configured separately from the vertical window frames 8a, 8b and are fixed to the vertical window frames 8a, 8b.

[0032] However, when implementing a fire grille according to one aspect of the present disclosure, the vertical window frame and the upper window frame bracket or / and the lower window frame bracket can be integrally configured, and the vertical window frame can also serve as the upper window frame bracket or / and the lower window frame bracket. Therefore, as will be described later, in this example, the window frame side engaging portion provided on the upper window frame bracket and the stopper portion provided on the lower window frame bracket can also be provided directly on the vertical window frame.

[0033] Upper window frame bracket The upper window frame brackets 9a, 9b are attached to the upper ends of the vertical window frames 8a, 8b, respectively. The upper window frame bracket 9a attached to the vertical window frame 8a on one side in the left-right direction (the left side in Figure 3) and the upper window frame bracket 9b attached to the vertical window frame 8b on the other side in the left-right direction (the right side in Figure 3) are attached at the same position in the up-down direction.

[0034] The pair of window frame upper brackets 9a, 9b are symmetrical to each other in the left-right direction. As shown in Figure 15, the window frame upper brackets 9a, 9b have a generally L-shaped side profile when viewed from the left-right direction. The window frame upper brackets 9a, 9b have a window frame side engaging portion 11 and an upper clamping portion 12.

[0035] The window frame side engaging portion 11 is provided at the outdoor side of the upper ends of the window frame upper brackets 9a, 9b. The window frame side engaging portion 11 is provided on the upper extension portion 13, which is configured in a flat plate shape and arranged with its plate thickness oriented in the left-right direction. Specifically, the window frame side engaging portion 11 is provided on the outdoor side of the upper extension portion 13.

[0036] In this example, the window frame side engaging portion 11 is configured as a substantially rectangular cutout that opens on the upper end surface and both left and right side surfaces of the upper protruding portion 13. The shape of the window frame side engaging portion 11 is not limited to a cutout, and it may be configured in other shapes, such as a through-hole (including a slit) with a closed periphery or a hook shape, as long as it is a shape that can be engaged with and disengaged from the slide members 96a and 96b described below.

[0037] In order to prevent the window frame side engagement portion 11 from interfering with the slide members 96a, 96b in the event of thermal expansion of the window frame 3 or the like in the event of a fire, gaps are provided between the window frame side engagement portion 11 and the outer surfaces of the slide members 96a, 96b in the vertical and indoor / outdoor directions under normal conditions.

[0038] The upper clamping portion 12 is a portion that fixes the upper window frame brackets 9a, 9b to the vertical window frames 8a, 8b. In this example, the upper clamping portion 12 has a substantially U-shaped end face shape and has an upper clamping groove 14 that opens outward in the left-right direction and extends in the up-down direction.

[0039] As shown in Figures 7 and 8, the upper window frame brackets 9a, 9b are fixed to the vertical window frames 8a, 8b by pressing the thin plate-shaped vertical frame fin pieces 15 provided on the vertical window frames 8a, 8b into the inside of the upper clamping grooves 14 and clamping the vertical frame fin pieces 15 in the indoor / outdoor direction with the upper clamping portions 12.

[0040] The window frame upper brackets 9a and 9b of this example are made up of multiple members. As shown in Figure 16, the window frame upper brackets 9a and 9b are made up of two members: an upper first part 16 having a window frame side engaging part 11, and an upper second part 17 having an upper clamping part 12.

[0041] The upper first component 16 is a machined (pressed) product of an aluminum alloy extrusion, and has a substantially L-shaped side surface when viewed from the left-right direction. The upper first component 16 has an upper overhanging portion 13 and an upper overlapping plate portion 18 that extends downward from the indoor-side end of the upper overhanging portion 13. The upper second component 17 is made of stainless steel plate and has a substantially L-shaped end face. The upper second component 17 has an upper clamping portion 12 and an upper base plate 19 that is bent at a substantially right angle from the outer left-right end of the upper clamping portion 12 toward the outdoor side.

[0042] In this example, the upper first component 16 and the upper second component 17 are fixed together by overlapping and welding (spot welding) the upper overlapping plate portion 18 of the upper first component 16 to the upper substrate 19 of the upper second component 17. However, the upper first component and the upper second component can also be fixed together by other fixing means such as screws.

[0043] When implementing a fire grille according to one aspect of the present disclosure, the upper window frame bracket can be omitted by providing the window frame side engagement portion directly on the upper end of the vertical window frame.

[0044] 《Window frame bottom bracket》 The window frame lower brackets 10a, 10b are attached to the lower parts (lower ends) of the vertical window frames 8a, 8b, respectively. The window frame lower bracket 10a attached to the vertical window frame 8a on one side in the left-right direction and the window frame lower bracket 10b attached to the vertical window frame 8b on the other side in the left-right direction are attached at the same position in the up-down direction.

[0045] As shown in Figure 17, the pair of window frame lower brackets 10a, 10b are symmetrical to each other in the left-right direction, with some exceptions. The window frame lower brackets 10a, 10b have a pivot 20 and a lower clamping portion 21.

[0046] The pivot 20 serves as the center of rotation when the fire grille 1 swings open. The pivot 20 is provided at the lower end of the window frame lower brackets 10a, 10b with its central axis facing horizontally (left-right). The pivot 20 has a cylindrical shape. The tip of the pivot 20 is provided with an outward flange-shaped retaining flange 22.

[0047] The lower clamping portion 21 is a portion that fixes the window frame lower brackets 10a, 10b to the vertical window frames 8a, 8b. In this example, the lower clamping portion 21 has a substantially U-shaped end face shape and has a lower clamping groove 23 that opens outward in the left-right direction and extends in the up-down direction.

[0048] Of the pair of window frame lower brackets 10a, 10b, only the window frame lower bracket 10a on one side in the left-right direction shown in FIG.

[0049] The stopper portion 24 is a member that engages with the louver base 78 of the louver opening / closing mechanism 38 (described later) to prevent the louver base 78 from moving downward when the fire grille 1 is in the closed state. The stopper portion 24 is provided at the outdoor end of the upper end of the window frame lower bracket 10a.

[0050] The stopper portion 24 has an upper surface with an inclined surface 27 that slopes downward as it approaches the outdoor side. The stopper portion 24 is located closer to the outdoor side than the pivot 20. The inclined surface 27 can be configured in a straight line or in a curved shape, such as a convex arc shape.

[0051] As shown in Figures 9 and 10, the window frame lower brackets 10a, 10b are fixed to the window vertical frames 8a, 8b by pressing the thin plate-shaped vertical frame fin pieces 15 provided on the window vertical frames 8a, 8b into the inside of the lower clamping grooves 23 and clamping the vertical frame fin pieces 15 in the indoor / outdoor direction by the lower clamping portions 21.

[0052] The window frame lower brackets 10a, 10b of this example are made up of multiple components. As shown in Figure 18, the window frame lower bracket 10a on one side in the left-right direction is broadly composed of three components: a lower first component 25 having a pivot 20, a lower second component 26 having a lower clamping portion 21, and a lower third component 28 having a stopper portion 24. In contrast, the window frame lower bracket 10b on the other side in the left-right direction is broadly composed of two components: the lower first component 25 and the lower second component 26.

[0053] The lower first component 25 is made of stainless steel plate and includes a pivot 20, a lower first overlapping plate portion 29 with its plate thickness oriented in the left-right direction, and a bent portion 30 with a generally U-shaped end surface when viewed from the top-bottom direction, the bent portion 30 having its outdoor-side end connected to the indoor-side end of the lower first overlapping plate portion 29. The lower first overlapping plate portion 29 and the bent portion 30 are integrally formed, and the pivot 20 is fixed to the lower first overlapping plate portion 29 by welding (spot welding). The lower second component 26 is also made of stainless steel plate and has a generally L-shaped end surface. The lower second component 26 includes a lower clamping portion 21 and a lower base plate 31 bent at a generally right angle from the outdoor-side end of the lower clamping portion 21 toward the outdoor side. The lower third component 28 is made of aluminum alloy and includes an overhanging arm portion 32 with a stopper portion 24 at its tip and a lower third overlapping plate portion 33 extending in the vertical direction.

[0054] In the window frame lower bracket 10a on one side in the left-right direction, the lower first overlapping plate portion 29 of the lower first part 25 is overlapped and welded (spot welded) to the lower part of the lower base plate 31 that constitutes the lower second part 26, and the lower third overlapping plate portion 33 of the lower third part 28 is overlapped and welded (spot welded) to the upper part of the lower base plate 31, thereby fixing the lower first part 25, the lower second part 26, and the lower third part 28 together. However, the lower first part, the lower second part, and the lower third part that constitute the window frame lower bracket on one side in the left-right direction can also be fixed by other fixing means such as screws.

[0055] In the window frame lower bracket 10b on the other side in the left-right direction, the lower first component 25 and the lower second component 26 are fixed together by overlapping and welding (spot welding) the lower first overlapping plate portion 29 of the lower first component 25 to the lower portion of the lower substrate 31 that constitutes the lower second component 26. However, the lower first component and the lower second component that constitute the window frame lower bracket on the other side in the left-right direction can also be fixed together by other fixing means such as screws.

[0056] (Inner and outer shoji screens) In this example, the inner shoji screen 4 and the outer shoji screen 5 are set inside the window frame 3 so as to be movable in the left-right direction (horizontal direction) and in a sliding manner.

[0057] The inner shoji screen 4 and outer shoji screen 5 are composed of a rectangular shoji frame and a rectangular glass panel fitted inside the frame. Each of the frames (upper frame, lower frame, door edge frame, and door frame) that make up the shoji frame is made of aluminum alloy.

[0058] The inner shoji screen 4 is set into the indoor portion of the window frame 3 so as to be movable left and right, and the outer shoji screen 5 is set into the outdoor portion of the window frame 3 so as to be movable left and right. When the inner shoji screen 4 and the outer shoji screen 5 are moved to their closed positions, the inner shoji screen 4 blocks one half of the left and right side of the opening in the window frame 3, and the outer shoji screen 5 blocks the other half of the left and right side of the opening in the window frame 3.

[0059] When implementing a fire grille according to one aspect of the present disclosure, the structure of the sash window is not limited to a sliding type, and other structures such as a fixed window, an inward-opening window, or an inward-tilting window can also be used.

[0060] [Fire protection grid] The fire grille 1 is installed on the outdoor side of the sash window 2 to ensure security and privacy, and together with the sash window 2 constitutes a window device.

[0061] The fire grille 1 of this example is broadly comprised of a grille body 36, a heat-sensing actuator 37, and a louver opening / closing mechanism 38. In this example, since the heat-sensing actuator 37 and the louver opening / closing mechanism 38 are provided in the grille body 36 as will be described later, no distinction will be made between the fire grille 1 and the grille body 36 in the description of the posture.

[0062] The fire grille 1 is supported so as to be able to swing on the outdoor side of the sash window 2, and under normal circumstances is held in a closed position (positioned parallel to the sash window 2 and completely covering the sash window 2 from the outdoor side) by a heat-sensing actuator 37, but in the event of a fire, the heat-sensing actuator 37 is activated and the grille is swung open. Furthermore, when the fire grille 1 of this example is swung open, the louver opening / closing mechanism 38 is activated and multiple louvers 40 are opened all at once.

[0063] Below, we will explain each component that makes up the fire grille 1 of this example. The fire grille 1 of this example changes its position between normal times and when a fire occurs, but we will explain its structure based on the normal state before the heat-sensing actuator 37 is activated, and then we will explain the operation of the heat-sensing actuator 37 and the louver opening / closing mechanism 38, and the behavior of the fire grille 1 after the heat-sensing actuator 37 is activated.

[0064] <Surface grille body> The surface grille body 36 is configured in a rectangular frame shape and has a frame body 39 supported so as to be swingable relative to the lower part of the window frame 3 that constitutes the sash window 2, and a plurality of louvers 40 supported on the inside of the frame body 39.

[0065] "Stile frame" The frame body 39 is formed in a rectangular frame shape by an upper frame 41, a lower frame 42, and left and right vertical frames 43a, 43b.

[0066] The frame 39 in this example is made up of a rectangular outdoor frame 44 located on the outdoor side, and a rectangular indoor frame 45 located on the indoor side. A plurality of louvers 40 are supported on the inside of the outdoor frame 44. A screen door 46 is attached to the indoor side of the louvers 40 so as to close the opening of the outdoor frame 44. Therefore, the indoor frame 45 closes all four sides of the space existing between the screen door 46 and the inner and outer shoji screens 4 and 5, ensuring visibility from the outdoor side and insect protection.

[0067] 33, the frame body 39 has a pair of movement limiting portions 47a, 47b that engage with a pair of slide members 96a, 96b (described later) that constitute the heat-sensing actuator 37, and limit the amount of movement of the pair of slide members 96a, 96b. In this example, since the pair of slide members 96a, 96b are disposed inside the upper frame 41, as described later, the pair of movement limiting portions 47a, 47b are provided on the upper frame 41.

[0068] The upper frame 41 consists of an upper frame body 48 and an upper frame closing piece 49, each made of an aluminum alloy.

[0069] The upper frame body 48 is configured in a roughly rectangular cylindrical shape and forms the upper side of the outdoor frame body 44. The left and right ends of the upper frame body 48 are connected to the upper ends of the left and right vertical frame bodies 54a and 54b, which will be described later.

[0070] As shown in Figure 33, the upper frame body 48 has a pair of slit-shaped insertion holes 51a, 51b that are long in the left-right direction on the other left-right side of the upper frame indoor wall portion 50 located on the indoor side. The pair of insertion holes 51a, 51b are arranged spaced apart in the left-right direction. Connection portions 100a, 100b provided on a pair of slide members 96a, 96b are inserted into the pair of insertion holes 51a, 51b.

[0071] In this example, of the pair of insertion holes 51a, 51b, the end on the other left-right side of the insertion hole 51a located on one left-right side serves as the movement limiting portion 47a, and the end on one left-right side of the insertion hole 51b located on the other left-right side serves as the movement limiting portion 47b. In other words, the proximal ends of the pair of insertion holes 51a, 51b constitute the movement limiting portions 47a, 47b. The movement limiting portions 47a, 47b, which constitute the closed ends of the insertion holes 51a, 51b, engage with the connecting portions 100a, 100b inserted through the insertion holes 51a, 51b, and limit the amount of movement of the slide members 96a, 96b.

[0072] The upper frame closing piece 49 is configured in a roughly flat plate shape and is arranged on the indoor side of the upper frame body 48, forming the upper edge of the indoor frame body 45. The upper frame closing piece 49 blocks the space between the upper frame body 48 and the window upper frame 6 when the fire grille 1 is in a closed state. The left and right ends of the upper frame closing piece 49 are connected to the upper ends of the left and right vertical frame closing pieces 55a, 55b, which will be described later. In this example, the upper frame body 48 and the upper frame closing piece 49 are configured as a single unit, but they may also be configured as separate pieces.

[0073] The lower frame 42 consists of a lower frame body 52 and a lower frame closing piece 53, each made of an aluminum alloy.

[0074] The lower frame body 52 is configured in a substantially rectangular cylindrical shape and forms the lower side of the outdoor frame body 44. The left and right ends of the lower frame body 52 are connected to the lower ends of the left and right vertical frame bodies 54a and 54b, which will be described later.

[0075] The bottom frame closing piece 53 is configured in a substantially flat plate shape and is arranged on the indoor side of the bottom frame body 52, forming the lower edge of the indoor frame body 45. The bottom frame closing piece 53 blocks the space between the bottom frame body 52 and the window bottom frame 7 when the fire grille 1 is in the closed state.

[0076] The vertical frames 43a, 43b are each made of an aluminum alloy vertical frame body 54a, 54b and vertical frame closing pieces 55a, 55b.

[0077] The vertical frame bodies 54a, 54b are configured in a generally rectangular cylindrical shape and form the left and right vertical sides of the outdoor side frame body 44. The upper end portions of the vertical frame bodies 54a, 54b are connected to the left and right ends of the upper frame body 48, and the lower end portions of the vertical frame bodies 54a, 54b are connected to the left and right ends of the lower frame body 52. ​​The vertical frame bodies 54a, 54b are configured from multiple members (two in the illustrated example).

[0078] As shown in Figure 33, the vertical stile bodies 54a, 54b have a first vertical stile insertion portion 57 penetrating in the left-right direction at the upper end of the vertical stile inner wall portion 56 located on the inside in the left-right direction. In this example, the first vertical stile insertion portion 57 is configured as a circular hole. The ends of the slide members 96a, 96b are inserted into the first vertical stile insertion portion 57 in the left-right direction.

[0079] As shown in Figures 12 and 20, the vertical stile bodies 54a, 54b have second vertical stile insertion portions 59 that penetrate in the indoor-outdoor direction at the upper end of the vertical stile inner wall portion 58 located on the indoor side. The second vertical stile insertion portions 59 are formed by cutouts that are long in the vertical direction, and open at the upper end surface of the vertical stile inner wall portion 58 and on both indoor-outdoor side surfaces.

[0080] Under normal circumstances, the outdoor-side portions of the upper extensions 13 that constitute the window frame upper brackets 9a, 9b are inserted into the stile second insertion portions 59. As a result, when the fire grille 1 is in the closed state, the ends of the slide members 96a, 96b inserted into the stile main bodies 54a, 54b through the stile first insertion portions 57 engage with the window frame-side engaging portions 11 inserted into the stile main bodies 54a, 54b through the stile second insertion portions 59.

[0081] In this example, the upper protrusion 13 is inserted into the left-right middle portion and the up-down middle portion of the second vertical stile insertion portion 59. In other words, the upper protrusion 13 is inserted into the second vertical stile insertion portion 59 with gaps provided between both left-right side surfaces and both up-down end surfaces of the upper protrusion 13 and the opening edges of the second vertical stile insertion portion 59.

[0082] In this example, the left-right width dimension of the second vertical stile insertion portion 59 is at least twice the left-right thickness dimension of the upper protrusion 13 on which the window-frame side engagement portion 11 is provided. Preferably, the left-right width dimension of the second vertical stile insertion portion 59 is about seven times the left-right thickness dimension of the upper protrusion 13 on which the window-frame side engagement portion 11 is provided. Furthermore, the up-down dimension of the second vertical stile insertion portion 59 is sufficiently larger than the up-down dimension of the upper protrusion 13. Specifically, the up-down dimension of the second vertical stile insertion portion 59 is about twice the up-down dimension of the upper protrusion 13.

[0083] 14, the stile bodies 54a and 54b of the stiles 43a and 43b have reinforcing metal fittings 60 inside their respective upper ends. The reinforcing metal fittings 60 have insertion portions 61 through which the ends of the slide members 96a and 96b can be inserted.

[0084] The reinforcing metal fittings 60 ensure the strength of the vertical stile bodies 54a, 54b and also guide the ends of the slide members 96a, 96b. The insertion portions 61 are circular holes whose inner diameters are slightly larger than the outer diameters of the ends of the slide members 96a, 96b.

[0085] In this example, the reinforcing metal fittings 60 have a substantially U-shaped end face. When the fire grille 1 is in a closed state, the reinforcing metal fittings 60 are arranged between the window-frame-side engaging portion 11 and the first vertical stile insertion portion 57 in the left-right direction, and are not arranged on the opposite side of the window-frame-side engaging portion 11 from the first vertical stile insertion portion 57 in the left-right direction. In other words, the reinforcing metal fittings 60 arranged inside the vertical stile 43a on one side in the left-right direction are arranged only on the other left-right side (inside) of the upper projection 13, and are not arranged on the other left-right side (outside) of the upper projection 13. Furthermore, the reinforcing metal fittings 60 arranged inside the vertical stile 43b on the other side in the left-right direction are arranged only on the one left-right side (inside) of the upper projection 13, and are not arranged on the other left-right side (outside) of the upper projection 13.

[0086] Of the vertical stile bodies 54a, 54b, the vertical stile body 54a on one side in the left-right direction has a vertical stile third insertion portion 62 that penetrates from indoors to outdoors in the lower portion of the vertical stile inner wall portion 58, as shown in Figure 13. The vertical stile third insertion portion 62 is configured as a notch that is long in the vertical direction. When the fire grille 1 is in the closed state, the extension arm 32 provided on the window frame lower bracket 10a is inserted into the vertical stile third insertion portion 62. Therefore, when the fire grille 1 is in the closed state, the stopper portion 24 provided at the tip of the extension arm 32 is located inside the lower portion of the vertical stile body 54a.

[0087] The vertical frame closing pieces 55a, 55b are configured with a generally L-shaped cross section and are fixed to the indoor sides of the vertical frame bodies 54a, 54b. The vertical frame closing pieces 55a, 55b form the left and right vertical sides of the indoor frame body 45. When the fire grille 1 is closed, the vertical frame closing pieces 55a, 55b block the gap between the vertical frame bodies 54a, 54b and the vertical window frames 8a, 8b. The upper ends of the vertical frame closing pieces 55a, 55b are connected to the left and right ends of the upper frame closing piece 49, and the lower ends of the vertical frame closing pieces 55a, 55b are connected to the left and right ends of the lower frame closing piece 53. In this example, the vertical frame bodies 54a, 54b and the vertical frame closing pieces 55a, 55b are configured separately, but they may also be configured as an integrated unit.

[0088] As shown in Figure 6, each of the vertical stile blocking pieces 55a, 55b has an engagement receiving portion 63 at its lower end. The engagement receiving portion 63 is configured as a notch that opens downward. The engagement receiving portion 63 has a semi-elliptical shape when viewed from the left and right, and the inner end of the engagement receiving portion 63 is configured as a concave arc.

[0089] In this example, the engagement receiving portion 63 engages from above with the pivot 20 provided on the window frame lower brackets 10a, 10b. Specifically, the engagement receiving portion 63 is inserted from above between the lower third overlapping plate portion 33 and the retaining flange portion 22, and engages with the pivot 20. This allows the lower end of the fire grille 1 to be supported so that it can swing relative to the window frame 3. Therefore, the weight of the fire grille 1 is supported by the window frame 3 via the window frame lower brackets 10a, 10b.

[0090] The frame body 39 of this example further includes a middle mullion 64. The middle mullion 64 is configured in a roughly rectangular cylindrical shape. The upper end of the middle mullion 64 is connected to the middle part of the upper frame body 48 in the left-right direction, and the lower end of the middle mullion 64 is connected to the middle part of the lower frame body 52 in the left-right direction. As a result, the middle mullion 64 divides the opening of the outdoor side frame body 44 into left and right halves.

[0091] Louva The louvers 40 are arranged in parallel in the vertical direction inside the frame body 39, and are supported so as to be able to rotate around central axes arranged horizontally relative to the vertical frames 43a, 43b that make up the frame body 39.

[0092] In this example, the louvers 40 are supported so as to be openable and closable inside the outdoor frame body 44 that constitutes the frame body 39. The louvers 40 are strip-shaped members, and are arranged with their longitudinal directions facing in the left-right direction.

[0093] In this example, as shown in Figures 4 and 31, multiple louvers 40 are arranged on both the left and right sides of the mullion 64. The ends of the louvers 40 on both the left and right sides are supported by the vertical frame 43a (or vertical frame 43b) and the central mullion 64 so as to be rotatable about a central axis arranged in the horizontal direction.

[0094] Specifically, the multiple louvers 40 in one row on one side in the left-right direction have their ends on one side in the left-right direction rotatably supported (pivoted) via a crankshaft 65 to the vertical frame body 54a, and their ends on the other side in the left-right direction are rotatably supported via a connecting shaft 66 to the central mullion 64. In contrast, the multiple louvers 40 in the other row on the left-right direction have their ends on one side in the left-right direction rotatably supported via the connecting shaft 66 to the central mullion 64, and their ends on the other side in the left-right direction are rotatably supported via a support pin 67 to the vertical frame body 54b.

[0095] A pair of louvers 40, arranged on both the left and right sides of the central mullion 64, are connected to each other so as not to rotate relative to each other via a connecting shaft 66 that is rotatably supported on the central mullion 64. Therefore, as shown in Figure 31, the multiple sets of louvers 40 arranged on both the left and right sides of the central mullion 64 rotate synchronously.

[0096] The louver 40 is made of an aluminum alloy, and as shown in Fig. 22, is composed of a louver main body 68 having a long corrugated plate shape, and a support cylinder portion 69 provided on the back surface of the louver main body 68. The louver main body 68 and the support cylinder portion 69 are integrally formed with each other.

[0097] The support cylinder portion 69 is provided over the entire length in the longitudinal direction of the louver main body 68. The support cylinder portion 69 is configured in a square tube shape and has an insertion hole 70 in the center.

[0098] The central axis of the insertion hole 70 is disposed in the horizontal direction. In this example, the insertion hole 70 is configured as a rectangular hole. The inner peripheral surface of the insertion hole 70 is provided with a plurality of inward protrusions 71. Specifically, of the four inner side surfaces that constitute the inner peripheral surface of the insertion hole 70, an inward protrusion 71 is provided on each of a pair of inner side surfaces that face each other. The inward protrusions 71 extend in the central axis direction of the insertion hole 70. The multiple inward protrusions 71 are disposed parallel to each other.

[0099] (crankshaft) The crankshaft 65 is made of an aluminum alloy and has a crank shape. As shown in Fig. 25, the crankshaft 65 is a cut product (pressed product) from a crankshaft blank 65x, which is an aluminum alloy crank plate (extruded profile), and is composed of an insertion shaft portion 72, a support shaft portion 73, and a connecting portion 74. The crankshaft 65, excluding the insertion shaft portion 72, is disposed inside the vertical frame 43a (vertical frame main body 54a) on one side in the left-right direction.

[0100] The insertion shaft 72 and the support shaft 73 are disposed horizontally and parallel to each other. The connecting portion 74 connects the proximal ends of the insertion shaft 72 and the support shaft 73 to each other.

[0101] The insertion shaft portion 72 has a rectangular pillar shape and is provided on the other left-right side of the crankshaft 65. The insertion shaft portion 72 has a rectangular cross-sectional shape that matches the insertion hole 70 provided in the louver 40.

[0102] The insertion shaft 72 is inserted in the left-right direction through a through-hole (not shown) provided in the vertical stile inner wall 56, and is supported so as to be rotatable only relative to the vertical stile inner wall 56. The insertion shaft 72 is arranged coaxially with the central axis of each insertion hole 70 of the louvers 40 in one row on one side in the left-right direction, and is press-fitted into the insertion hole 70 so as not to be rotatable relative to the louvers 40 in one row on the left-right direction. As a result, the insertion shaft 72 is fixed so as not to be rotatable relative to the louvers 40 in one row on the left-right direction.

[0103] The outer peripheral surface of the insertion shaft portion 72 is provided with a plurality of outward protrusions 75. Specifically, of the four outer surfaces constituting the outer peripheral surface of the insertion shaft portion 72, the outward protrusions 75 are provided on a pair of outer surfaces facing opposite each other. The outward protrusions 75 extend in a direction perpendicular to the insertion direction of the insertion shaft portion 72 into the insertion hole 70. That is, the outward protrusions 75 extend in the circumferential direction of the insertion shaft portion 72. The multiple outward protrusions 75 are arranged parallel to each other. Furthermore, the side surface on one left-right side of the outward protrusions 75 is inclined in a direction from the distal end side toward the proximal end side of the insertion shaft portion 72 as it moves from the radial inner side toward the radial outer side of the insertion shaft portion 72. That is, the side surface on one left-right side of the outward protrusions 75 is inclined in a direction opposite to the insertion direction of the insertion shaft portion 72 into the insertion hole 70.

[0104] In this example, when the insertion shaft 72 is inserted (press-fitted) into the insertion hole 70, the inward protrusion 71 and the outward protrusion 75 are arranged perpendicular to each other. The tip of the outward protrusion 75 is plastically deformed by the tip of the inward protrusion 71 and tightly engages with the inward protrusion 71.

[0105] The support shaft portion 73 has a rectangular pillar shape and is provided on one side in the left-right direction of the crankshaft 65. The support shaft portion 73 is rotatably supported by an interlocking rod 77, which will be described later.

[0106] (Connection shaft) The connecting shaft 66 is made of aluminum alloy and has a linear shape. As shown in Fig. 29, the connecting shaft 66 is a cut (pressed) product from a connecting shaft blank 66x, which is a flat plate (extruded shape) made of aluminum alloy, and has a pair of connecting insertion shaft portions 76 on both left and right sides. The middle portion of the connecting shaft 66 in the left-right direction is supported by the center mullion 64 so as to be rotatable only.

[0107] The connecting insertion shafts 76 have a rectangular columnar shape and a rectangular cross-sectional shape that matches the insertion holes 70 provided in the louvers 40. In this example, the connecting insertion shafts 76 on one side in the left-right direction are arranged coaxially with the central axes of the insertion holes 70 provided in the louvers 40 in one row on the left-right side, and are press-fitted into the insertion holes 70 so as not to rotate relative to them. Meanwhile, the connecting insertion shafts 76 on the other side in the left-right direction are arranged coaxially with the central axes of the insertion holes 70 provided in the louvers 40 in the other row on the left-right side, and are press-fitted into the insertion holes 70 so as not to rotate relative to them. As a result, the connecting insertion shafts 76 on one side in the left-right direction are fixed so as not to rotate relative to the louvers 40 in one row on the left-right side, and the connecting insertion shafts 76 on the other side in the left-right direction are fixed so as not to rotate relative to the louvers 40 in the other row on the left-right side.

[0108] The outer peripheral surface of the connecting insertion shaft portion 76 is provided with a plurality of outward protrusions 75. The outward protrusions 75 provided on the outer peripheral surface of the connecting insertion shaft portion 76 have the same configuration as the outward protrusions 75 provided on the outer peripheral surface of the insertion shaft portion 72.

[0109] When implementing a fire grating according to one aspect of the present disclosure, if the opening area of ​​the opening of the fire grating is small, the mullion and connecting shaft can be omitted.

[0110] <Louver opening / closing mechanism> The louver opening / closing mechanism 38 synchronously (collectively) opens and closes the multiple louvers 40. The louver opening / closing mechanism 38 of this example can not only manually open and close the louvers 40, but also automatically open the louvers 40 in the event of a fire.

[0111] However, when implementing a fire grating according to one aspect of the present disclosure, it is optional to provide a louver opening / closing mechanism. Even if a louver opening / closing mechanism is provided, it is optional for the louver opening / closing mechanism to have a configuration that automatically opens multiple louvers in the event of a fire.

[0112] In this example, the louver opening / closing mechanism 38 is disposed inside the vertical frame 43a on one side in the left-right direction.

[0113] As shown in FIG. 23 and other figures, the louver opening / closing mechanism 38 has an interlocking rod 77, a louver base 78, a biasing force imparting member 79, and a lever mechanism portion 80.

[0114] 《Interlocking rod》 The interlocking rod 77 is disposed inside the vertical frame body 54a that constitutes the vertical frame 43a, and moves up and down to open and close the multiple louvers 40.

[0115] In this example, the interlocking rod 77 is made of a long plate-like member, and is arranged with its longitudinal direction facing the up-down direction and its plate thickness facing the left-right direction.

[0116] The interlocking rod 77 has an action pin 81 (see FIG. 32) at a part in the vertical direction.

[0117] The interlocking rod 77 rotatably supports the support shaft portions 73 of the multiple crankshafts 65. Therefore, when the interlocking rod 77 moves up and down, the multiple crankshafts 65 rotate around their respective insertion shaft portions 72. This makes it possible to open and close multiple louvers 40 collectively. Specifically, as shown in Figures 31(A) and 32(A), moving the interlocking rod 77 upward allows multiple louvers 40 to be closed collectively, and as shown in Figures 31(B) and 32(B), moving the interlocking rod 77 downward allows multiple louvers 40 to be opened collectively.

[0118] Louver base The louver base 78 supports the interlocking rod 77 so that it can move up and down, and is disposed inside the vertical frame body 54a that constitutes the vertical frame 43a so that it can move downward.

[0119] In this example, the louver base 78 is made of a long plate-like member, and is arranged with its longitudinal direction facing the vertical direction and its plate thickness facing the indoor / outdoor direction. The louver base 78 is arranged on the indoor side of the interlocking rod 77.

[0120] 7, the louver base 78 is slidably engaged in a dovetail-shaped engaging groove 82 provided on the outdoor side of the vertical frame interior wall portion 58 of the vertical frame main body 54a. This prevents the louver base 78 from moving left and right and indoors and outdoors relative to the vertical frame main body 54a.

[0121] As shown in Figure 23, when the fire grille 1 is in the closed state, the louver base 78 engages with the stopper portion 24 inserted into the stile main body 54a through the stile third insertion portion 62 of the stile main body 54a. Specifically, the lower surface of the louver base 78 engages with the inclined surface 27 on the upper surface of the stopper portion 24. This prevents the louver base 78 from moving downward. As will be described later, a downward biasing force is applied to the louver base 78 by the biasing force applying member 79, but the louver base 78 is prevented from moving downward regardless of this biasing force.

[0122] As shown in FIG. 42(A), the engagement portion between the louver base 78 and the stopper portion 24 is located on the outdoor side of the pivot 20 which is the swing center of the fire grille 1.

[0123] The louver base 78 has, at its lower end, a locking portion 83. In this example, the locking portion 83 is configured in the shape of a substantially J-shaped hook.

[0124] <<Using force imparting member>> The biasing force applying member 79 applies a downward biasing force to the louver base 78 .

[0125] In this example, the biasing force applying member 79 is made of an elastic member such as a spring or fire-resistant rubber, etc. Specifically, the biasing force applying member 79 is made of a tension spring.

[0126] The biasing force applying member 79 is disposed between the lower end of the louver base 78 and the lower end of the stile main body 54a. Specifically, the biasing force applying member 79 spans between a protrusion 84 provided on the lower end of the stile interior wall portion 58 of the stile main body 54a and a locking portion 83 provided on the lower end of the louver base 78. However, when implementing a fire grille according to one embodiment of the present disclosure, the biasing force applying member may be disposed in another position, such as between the upper end of the stile and the upper end of the louver base, rather than between the lower end of the stile and the lower end of the louver base. Note that when the biasing force applying member is disposed between the upper end of the stile and the upper end of the louver base, the biasing force applying member may be configured by a compression coil spring or the like.

[0127] When the fire grille 1 is in the closed state, the biasing member 79 extends from its free state and applies a downward biasing force to the louver base 78. As a result, the lower surface of the louver base 78 is pressed against the inclined surface 27 of the upper surface of the stopper portion 24.

[0128] Lever mechanism The lever mechanism 80 is a member that enables the louvers 40 to be opened and closed manually.

[0129] The lever mechanism 80 includes a lever support 85 and a lever 86 .

[0130] (Lever support part) The lever support portion 85 has a substantially T-shaped side surface when viewed from the left and right, and includes an attachment portion 87, an angle adjustment portion 88, and an intermediate protrusion portion 89.

[0131] The mounting portions 87 are provided at both ends in the vertical direction of the lever support portion 85. The mounting portions 87 are fixed to the louver base 78 by screws 90.

[0132] The angle adjustment portion 88 is for adjusting and maintaining the swing angle of the lever 86, and is provided on the indoor end surface of the vertically intermediate portion of the lever support portion 85. The angle adjustment portion 88 has an uneven shape with multiple recesses and multiple protrusions arranged alternately in the vertical direction. The lever mechanism portion 80 of this example can adjust the swing angle of the lever 86, in other words, the opening angle of the louver 40, in stages equal to the number of recesses that make up the angle adjustment portion 88.

[0133] The intermediate protrusion 89 protrudes toward the exterior from the vertical middle of the lever support portion 85. A fulcrum pin 91 is fixed to the tip of the intermediate protrusion 89.

[0134] (lever) The lever 86 is supported so as to be swingable up and down relative to the lever support portion 85. The lever 86 has a knob portion 92 provided at the indoor end, a pin insertion hole 93 provided at the outdoor end, a pin engagement hole 94 provided between the knob portion 92 and the pin insertion hole 93, and a locking pin 95 provided between the pin engagement hole 94 and the knob portion 92.

[0135] The pin insertion hole 93 is configured as a long hole that is long in the longitudinal direction of the lever 86. A fulcrum pin 91 is inserted into the pin insertion hole 93 so as to be movable in the longitudinal direction of the lever 86.

[0136] The pin engagement hole 94 is configured as a long hole that is long in the longitudinal direction of the lever 86. The action pin 81 provided on the interlocking rod 77 is engaged with the pin engagement hole 94 so as to be movable in the longitudinal direction of the lever 86.

[0137] The locking pin 95 is locked in a recess in the angle adjustment portion 88 provided in the lever support portion 85, and keeps the swing angle of the lever 86 constant. In this example, to prevent the locking pin 95 from accidentally falling out of the recess in the angle adjustment portion 88, a spring, which is an elastic member, is hung between the lever 86 and an intermediate protrusion 89 provided in the lever support portion 85.

[0138] In the lever mechanism 80 of this example, the lever 86 is swung up and down about the fulcrum pin 91, thereby moving the interlocking rod 77 up and down and opening and closing the multiple louvers 40 collectively. That is, by swinging the lever 86 up and down about the fulcrum pin 91, the action pin 81 of the interlocking rod 77 is moved up and down, and the multiple louvers 40 supported by the interlocking rod 77 via the crankshaft 65 are opened and closed collectively. For example, as shown in FIGS. 31(A) and 32(A), when the lever 86 is swung upward so as to lift the knob 92, the multiple louvers 40 can be closed collectively, and when the lever 86 is swung downward so as to lower the knob 92, the multiple louvers 40 can be opened collectively.

[0139] <Heat-sensing actuator> The heat-sensing operating device 37 engages with the window frame side engaging portion 11 provided on the top of the left and right vertical window frames 8a, 8b of the window frame 3 to hold the fire grille 1 (grating body 36) in the closed position, and when a predetermined temperature is reached, it disengages from the window frame side engaging portion 11, allowing the fire grille 1 to swing open.

[0140] The heat-sensing actuator 37 includes a pair of slide members 96a, 96b and a drive mechanism 97, as shown in FIG.

[0141] <Sliding member> The pair of slide members 96a, 96b are arranged so as to be engageable with and disengageable from window frame side engaging portions 11 provided on the left and right vertical window frames 8a, 8b, and so as to be movable in the left-right direction.

[0142] In this example, the slide members 96a and 96b are elongated members, and are arranged inside the upper frame body 48 of the upper frame 41 that constitutes the frame body 39, with their longitudinal directions facing the left-right direction.

[0143] The outer peripheral surfaces of the slide members 96a, 96b are cylindrical, at least at the tip portions that engage with the window frame-side engaging portion 11. In this example, the slide members 96a, 96b are made of rod-shaped members, and most of their outer peripheral surfaces are cylindrical, except for the portions where the connecting portions 100a, 100b (described later) are provided. The tip surfaces of the slide members 96a, 96b are hemispherical.

[0144] The sum of the overall lengths of the two slide members 96a, 96b is smaller than the left-right dimension of the surface grille main body 36 (upper frame main body 48). For this reason, a gap 98 (see FIGS. 3 and 8) is provided between the proximal ends (base ends) of the slide members 96a, 96b. The left-right dimension of the gap 98 is set to a size that prevents the proximal ends of the slide members 96a, 96b from interfering with each other, even when the drive mechanism 97 is activated and the pair of slide members 96a, 96b move toward each other.

[0145] The slide members 96a, 96b are supported by guide portions 99 so as to be able to slide in the left-right direction relative to the upper frame body 48. In this example, the slide member 96a on one side in the left-right direction is supported by two guide portions 99, and the slide member 96b on the other side in the left-right direction is supported by one guide portion 99.

[0146] As shown in Figures 34 and 38, the pair of slide members 96a, 96b are each connected to a drive mechanism 97. For this purpose, the slide members 96a, 96b have connection portions 100a, 100b in a portion of their respective longitudinal lengths. The slide member 96a on one side in the left-right direction has the connection portion 100a at its base end. The slide member 96b on the other side in the left-right direction has the connection portion 100b in its middle portion.

[0147] The connecting portions 100a, 100b are disposed so as to protrude in a direction perpendicular to the longitudinal direction of the slide members 96a, 96b, that is, toward the indoor side.

[0148] In this example, the connection parts 100a and 100b have a flat plate shape and are arranged with their thickness direction facing up and down. The connection parts 100a and 100b are inserted into elongated insertion holes 51a and 51b formed in the upper frame interior wall part 50 of the upper frame main body 48, and their respective tips protrude into the indoor side of the upper frame main body 48.

[0149] In this example, the connection portions 100a, 100b are configured separately from the long, rod-shaped slide member main bodies 101a, 101b that constitute the slide members 96a, 96b, and are fixed to the slide member main bodies 101a, 101b by fastening members 102 such as bolts, but the connection portions may also be provided integrally with the slide member main bodies.

[0150] When implementing a fireproof grille according to one aspect of the present disclosure, the shape of the connection part is not limited to a flat plate shape, and may be configured in other shapes such as a cylindrical shape or a rectangular prism shape, as long as it can be inserted through the insertion hole formed in the upper frame body and can be connected to a drive mechanism.

[0151] In this example, the slide member 96a on one side in the left-right direction is prevented from moving further in the other left-right direction by the engagement of the connection portion 100a with the movement limiting portion 47a constituting the end portion on the other left-right side of the insertion hole 51a. The slide member 96b on the other side in the left-right direction is prevented from moving further in the one left-right direction by the engagement of the connection portion 100b with the movement limiting portion 47b constituting the end portion on one left-right side of the insertion hole 51b.

[0152] The left-right positions of the movement limiting portions 47a, 47b, in other words, the end positions of the insertion holes 51a, 51b, are set to a position where the engagement between the slide members 96a, 96b and the window frame side engagement portion 11 is released when the movement limiting portions 47a, 47b and the connection portions 100a, 100b are engaged (abutted) with each other.

[0153] As shown in Figures 14 and 33(A), the distal end (tip) of each of the slide members 96a, 96b is inserted into the inside of the vertical frame main body 54a, 54b through the vertical frame first insertion portion 57 formed on the vertical frame inner wall portion 56 of the left and right vertical frames 43a, 43b and the insertion portion 61 of the reinforcing bracket 60.

[0154] Under normal conditions, the tip of slide member 96a engages with window frame engaging portion 11 provided on window frame upper bracket 9a in the indoor / outdoor direction, and the tip of slide member 96b engages with window frame engaging portion 11 provided on window frame upper bracket 9b in the indoor / outdoor direction. Specifically, the left and right ends of slide members 96a, 96b, which have cylindrical outer surfaces, are inserted laterally through the vertical and indoor / outdoor middle portions of notched window frame engaging portion 11. This prevents fire grille 1 from swinging toward the outdoors and holds fire grille 1 in the closed position.

[0155] In this example, the pair of slide members 96a, 96b have different length dimensions. In this example, as will be described later, because the drive mechanism 97 is attached to the other end of the upper frame 41 in the left-right direction, the total length of the slide member 96a on one side in the left-right direction, whose tip is located farther from the drive mechanism 97, is longer than the total length of the slide member 96b on the other side in the left-right direction, whose tip is located closer to the drive mechanism 97. However, when the drive mechanism is located on one side of the upper frame in the left-right direction, the total length of the slide member on one side in the left-right direction is made shorter than the total length of the slide member on the other side in the left-right direction, and when the drive mechanism is located in the center position of the upper frame in the left-right direction, the total lengths of the pair of slide members are made the same.

[0156] Drive Mechanism The drive mechanism 97 includes a biasing member 103 that applies a biasing force to the pair of slide members 96a and 96b.

[0157] In this example, the drive mechanism 97 includes one biasing member 103. However, when implementing a fire grate according to one aspect of the present disclosure, the drive mechanism may include multiple (e.g., two) biasing members.

[0158] (biasing member) The biasing member 103 applies a biasing force to one slide member 96a and the other slide member 96b of the pair of slide members 96a, 96b.

[0159] The biasing member 103 is configured to be expandable and contractible in the left-right direction. In this example, both left-right end portions of the biasing member 103 are connected to a pair of slide members 96a, 96b via restricting members 104, which will be described later. However, the end portions of the biasing member can also be directly connected to the slide members.

[0160] In this example, the biasing member 103 is made of an elastic member such as a spring or fire-resistant rubber, etc. Specifically, the biasing member 103 is made of a tension spring.

[0161] The biasing member 103 is connected to the pair of slide members 96a, 96b in an elastically stretched state when the fire grille 1 is in the closed state. Therefore, when the fire grille 1 is in the closed state, the biasing member 103 applies a biasing force to the pair of slide members 96a, 96b in directions that move them toward each other.

[0162] (Regulating member) The drive mechanism 97 further includes a regulating member 104 that prevents the movement of the pair of slide members 96a, 96b until a predetermined temperature (for example, approximately 60°C to 120°C) is reached, and that releases the prevention of the movement of the pair of slide members 96a, 96b when the predetermined temperature is reached.

[0163] The restricting member 104 is disposed at approximately the same position in the left-right direction as the biasing member 103. In this example, the restricting member 104 is disposed on the indoor side of the biasing member 103.

[0164] In this example, the left and right ends of the restricting member 104 are attached to the connecting portions 100a and 100b of the sliding members 96a and 96b and the left and right ends of the biasing member 103, respectively. However, when implementing a fire grille according to one aspect of the present disclosure, the left and right ends of the restricting member may be connected to only one of the sliding member or the biasing member, as long as the sliding member and the biasing member are directly connected.

[0165] The restricting member 104 includes a melting member 105 that melts or melts when the predetermined temperature is reached.

[0166] In this example, the restricting member 104 is composed of a fusing member 105 and a pair of relay members 106a and 106b. The fusing member 105 and the pair of relay members 106a and 106b are configured separately from each other. However, when implementing a fire grille according to one embodiment of the present disclosure, the fusing member and the pair of relay members can also be configured as a single unit.

[0167] (melting material) The melting member 105 normally supports the biasing force (elastic force) of the biasing member 103. The melting member 105 is provided at the middle part of the restricting member 104 in the left-right direction.

[0168] Melting member 105 is made of a low-melting-point alloy and has a lower melting point than the other members constituting drive mechanism 97. Melting member 105 is a thermal fuse that melts when the predetermined temperature is reached, and functions as a temperature sensor that detects when the predetermined temperature is reached.

[0169] The fusing member 105 is formed in a thin plate shape and is attached so as to bridge the pair of relay members 106a, 106b before being melted. In this example, the fusing member 105 is formed by joining two copper-based metal plates together.

[0170] The entire fusing member 105 does not have to be a thermal fuse, but may be a thermal fuse in part as long as it can be melted when the predetermined temperature is reached. In this case, a copper-based alloy or the like may be used on both the left and right ends of the fusing member.

[0171] (Relay component) The pair of relay members 106 a and 106 b transmits the biasing force of the biasing member 103 to the melting member 105 .

[0172] The pair of relay members 106a, 106b are connected to each other via the fusing member 105. Specifically, the pair of relay members 106a, 106b are connected via the fusing member 105 in a state in which a portion of each of them overlaps in the indoor / outdoor direction. Therefore, the pair of relay members 106a, 106b are prevented from moving relative to each other in the left-right direction under normal conditions. The pair of relay members 106a, 106b are supported by a casing 116 (described later) constituting the drive mechanism 97 so as to be movable only in the left-right direction, so that they can move in the left-right direction when the fusing member 105 melts.

[0173] In this example, the relay members 106a, 106b are configured in the shape of crank plates. The relay members 106a, 106b are arranged with their longitudinal direction facing the left-right direction and their plate thickness direction facing the indoor-outdoor direction. The pair of relay members 106a, 106b are arranged offset in the left-right direction with their respective proximal portions overlapping in the indoor-outdoor direction.

[0174] The relay member 106a on one side in the left-right direction has its one end in the left-right direction attached to the connecting portion 100a of the slide member 96a and the end in the left-right direction of the urging member 103, and its other end in the left-right direction attached to the end in the left-right direction of the fusing member 105. The relay member 106b on the other side in the left-right direction has its other end in the left-right direction attached to the connecting portion 100b of the slide member 96b and the end in the left-right direction of the urging member 103, and its one end in the left-right direction attached to the end in the left-right direction of the fusing member 105.

[0175] The relay members 106a and 106b include mounting plate portions 107a and 107b, overlapping plate portions 108a and 108b, and extending portions 109a and 109b.

[0176] The mounting plate 107a is provided on one side of the relay member 106a in the left-right direction, and the mounting plate 107b is provided on the other side of the relay member 106b in the left-right direction. The mounting plates 107a and 107b are arranged at approximately the same position as the central axis of the biasing member 103 in the indoor / outdoor direction.

[0177] The left and right ends of the connecting portions 100a, 100b of the slide members 96a, 96b and the biasing member 103 are attached to the mounting plate portions 107a, 107b. In this example, the connecting portions 100a, 100b of the slide members 96a, 96b are attached to the mounting plate portions 107a, 107b by being securely locked (inserted) from the outdoor side into rectangular locking holes 110a, 110b formed in the mounting plate portions 107a, 107b. The left and right ends of the biasing member 103 are attached to the mounting plate portions 107a, 107b with fixing screws 111a, 111b.

[0178] When implementing a fireproof surface grille according to one aspect of the present disclosure, the attachment structure of the connecting portion of the sliding member and the biasing member to the relay member is not limited to the structure in this example, and can be modified as appropriate.

[0179] The overlapping plate portion 108a is provided on the other left-right side of the relay member 106a on one side in the left-right direction, and the overlapping plate portion 108b is provided on one left-right side of the relay member 106b on the other side in the left-right direction. The overlapping plate portions 108a and 108b are arranged closer to the indoor side than the mounting plate portions 107a and 107b, and are overlapped with each other in the indoor-outdoor direction. In this example, the overlapping plate portion 108a provided on the relay member 106a on one side in the left-right direction is arranged closer to the outdoors than the overlapping plate portion 108b provided on the relay member 106b on the other side in the left-right direction.

[0180] The left-right dimension of the outdoor-side overlapping plate portion 108a is smaller than the left-right dimension of the indoor-side overlapping plate portion 108b. In the illustrated example, the left-right dimension of the indoor-side overlapping plate portion 108b is approximately twice the left-right dimension of the outdoor-side overlapping plate portion 108a. Under normal conditions, the left-right dimension of the outdoor-side overlapping plate portion 108a is approximately the same as the left-right dimension of the fusing member 105.

[0181] The left and right ends of the fusing member 105 are attached to the overlapping plate portions 108a and 108b. Specifically, the left and right end of the fusing member 105 is attached to the overlapping plate portion 108a provided on the relay member 106a on one side in the left and right direction, and the left and right end of the fusing member 105 is attached to the overlapping plate portion 108b provided on the relay member 106b on the other side in the left and right direction.

[0182] The other left-right end of the fusing member 105 may be fixed to the overlapping plate portion 108a provided on the relay member 106a on one left-right side using a mounting screw 114a as shown in Fig. 35, or may be attached by engaging an engaging claw 117 provided on the overlapping plate portion 108a with an engaging hole 118 provided in the fusing member 105 as shown in Fig. 36, or may be attached by some other structure. In either case, the mounting screw 114a and the engaging claw 117 are attached to the other left-right end of the fusing member 105 through a through-hole 115 provided in the overlapping plate portion 108b of the relay member 106b on the other left-right side.

[0183] The end portion of one of the left and right sides of the melting member 105 may be fixed to the overlapping plate portion 108b provided on the relay member 106b on the other left and right side using a mounting screw 114b as shown in Figure 35, or may be fixed using a bolt 112 and a nut 113 as shown in Figure 36, or may be attached using some other structure.

[0184] The extension portions 109a and 109b connect the mounting plate portions 107a and 107b to the overlapping plate portions 108a and 108b. Specifically, the extension portion 109a connects the other left-right end of the mounting plate portion 107a to one left-right end of the overlapping plate portion 108a, and the extension portion 109b connects the one left-right end of the mounting plate portion 107b to the other left-right end of the overlapping plate portion 108b. In this example, the indoor / outdoor dimension of the extension portion 109b is slightly larger than the indoor / outdoor dimension of the extension portion 109a.

[0185] The pair of relay members 106a, 106b are biased toward each other in the left-right direction by the biasing force (elastic force) of the biasing member 103. As a result, the overlapping plate portion 108a of the relay member 106a on one side in the left-right direction presses the end portion on the other side in the left-right direction of the fusing member 105 toward the other side in the left-right direction, while the overlapping plate portion 108b of the relay member 106b on the other side in the left-right direction presses the end portion on one side in the left-right direction of the fusing member 105 toward the one side in the left-right direction.

[0186] As a result, a tensile force in the left-right direction is applied to the melting member 105 by the biasing member 103. Under normal conditions, the melting member 105 bears the tensile force applied by the biasing member 103. When the melting member 105 reaches the predetermined temperature and melts, the tensile force of the biasing member 103 causes the mounting plate portion 107a on one side in the left-right direction and the mounting plate portion 107b on the other side in the left-right direction to move toward each other in the left-right direction. As a result, the pair of slide members 96a, 96b move toward each other.

[0187] (Casing) The drive mechanism 97 of this example further includes a casing 116 that covers the biasing member 103 and the restricting member 104 .

[0188] The casing 116 is configured in a substantially rectangular box shape. The casing 116 is open on the indoor side. As shown in Figures 5 and 19, the opening on the indoor side of the casing 116 is closed by fixing an indoor side panel portion 123.

[0189] A bottom plate 119 constituting the casing 116 has a guide groove 120 that is long in the left-right direction at the middle part of the top surface in the indoor-outdoor direction. The lower ends of the mounting plate parts 107a and 107b constituting the relay members 106a and 106b are engaged with the guide groove 120 so as to be slidable in the left-right direction.

[0190] The casing 116 is fixed to the upper frame body 48 (upper frame inner wall portion 50) using mounting screws 121 (see FIG. 19).

[0191] (heat transfer material) The driving mechanism 97 of this example further includes a heat transfer member 122 for transferring heat to the melting member 105 that constitutes the restricting member 104 .

[0192] The heat transfer member 122 is made of a metal part with high thermal conductivity, such as solid aluminum.

[0193] The heat transfer member 122 is fixed inside the casing 116. Specifically, it is fixed with screws 124 to the middle part in the left-right direction of the outdoor side of the indoor side panel 123 that constitutes the casing 116. The heat transfer member 122 is disposed in contact with or in close proximity to the melting member 105. The heat transfer member 122 can be configured in a block shape as shown in Figures 34 and 37, or in a thin plate shape as shown in Figure 38.

[0194] <Angle Control Means> The fire grille 1 of this example further includes angle restriction means 125 between the fire grille 1 and the window frame 3 to restrict the opening angle (degree of opening) of the fire grille 1. In this example, one angle restriction means 125 is provided at each end of the fire grille 1 in the left and right directions.

[0195] In this example, the angle control means 125 comprises a storage case 126 fixed to the frame body 39, and a wire 127 whose end on one longitudinal side is positioned inside the storage case 126 and whose end on the other longitudinal side is fixed directly or indirectly to the window frame 3.

[0196] 39, in this example, storage case 126 has a rectangular cylindrical shape that is long in the vertical direction and is fixed inside the upper ends of vertical frame bodies 54a, 54b. Storage case 126 has openings 128 at the upper ends of its side surfaces and case-side stoppers 129 in the vertical middle.

[0197] In this example, opening 128 is configured as a notch having a substantially T-shaped opening shape in front view. Case side stopper 129 is configured as the shank of a bolt arranged with its central axis oriented horizontally.

[0198] One longitudinal end of wire 127 is housed in storage case 126 below case-side stopper 129. Wire 127 has wire-side stopper 130 at one longitudinal end that engages with case-side stopper 129 to prevent one longitudinal end of wire 127 from slipping out of opening 128 of storage case 126. Therefore, the one longitudinal end portion of wire 127 passes through the gap between the inner surface of storage case 126 and case-side stopper 129 in the vertical direction.

[0199] The wire-side stopper 130 is a die-cast product made of zinc alloy or the like, and has a shape that allows it to move up and down inside the storage case 126. In the illustrated example, the wire-side stopper 130 has a cylindrical shape.

[0200] The other end of the wire 127 in the length direction is fixed to upper window frame brackets 9a and 9b fixed to vertical window frames 8a and 8b.

[0201] As shown in Figure 41(B), when the fire grille 1 swings open, the angle restriction means 125 restricts the opening angle by tensioning the wires 127 between the fire grille 1 and the upper window frame brackets 9a, 9b. The opening angle of the fire grille 1 can be changed by changing the length of the wires 127, and the extent to which the opening angle is restricted can be determined appropriately based on the outdoor environment of the fire grille 1, for example, to about 10 to 40 degrees.

[0202] <Pressing member> The fire grille 1 of this example is provided with a pressing member 131 between the fire grille 1 and the window frame 3 that presses the fire grille 1 toward the outdoors when the heat-sensing actuator 37 is activated and the pair of slide members 96a, 96b are disengaged from the left and right window frame engaging portions 11, so that the fire grille 1 can be reliably swung open. However, when implementing a fire grille according to one embodiment of the present disclosure, it is optional to provide a pressing member between the fire grille and the window frame.

[0203] 7 and 8, in this example, the pressing member 131 is disposed between the stile bodies 54a, 54b of the left and right stiles 43a, 43b that make up the fire grille 1 and the left and right window frame upper brackets 9a, 9b. The pressing member 131 can be formed of an elastic member, and in this example, is formed of a compression coil spring. When the fire grille 1 is in the closed state, the pressing member 131 is compressed between the stile bodies 54a, 54b and L-shaped mounting brackets 132 fixed to the window frame upper brackets 9a, 9b.

[0204] [Explanation of operation of heat-sensing actuator] In the present example, when a fire breaks out and the melting member 105, which is a thermal fuse, reaches a predetermined temperature and melts, the drive mechanism 97 of the heat-sensing actuator 37 moves a pair of slide members 96a, 96b by the biasing force of the biasing member 103, as shown in Figures 35 and 36.

[0205] Specifically, the slide member 96a located on one side in the left-right direction is moved to the other side in the left-right direction, and the slide member 96b located on the other side in the left-right direction is moved to one side in the left-right direction. Then, as shown in Figure 33(A) → (B), the ends of the slide members 96a, 96b are pulled out in the left-right direction from the window frame-side engaging portion 11, thereby releasing the engagement between the slide members 96a, 96b and the window frame-side engaging portion 11 in the indoor / outdoor direction. This allows the fire grille 1 to swing open.

[0206] In this example, the pivot 20 is located below the indoor end of the fire grille 1, so the center of gravity of the fire grille 1 is located on the outdoor side of the pivot 20, which is the swing center. Therefore, when the sliding members 96a, 96b and the window frame side engaging parts 11 are disengaged, the fire grille 1 automatically swings open, as shown in Figure 41(A) → Figure 41(B). In this example, the pressing members 131 are located between the fire grille 1 and the left and right window frame upper brackets 9a, 9b, so when the sliding members 96a, 96b and the window frame side engaging parts 11 are disengaged, the fire grille 1 reliably swings open.

[0207] Furthermore, in this example, as shown in Figures 42(A) and 42(B), when the fire grille 1 swings open, the louver base 78 and the stopper 24, which constitute the louver opening / closing mechanism 38, are disengaged. A biasing member 79 is suspended between the louver base 78 and the lower end of the vertical frame 43a, applying a downward biasing force to the louver base 78. Therefore, when the engagement between the louver base 78 and the stopper 24 is disengaged, the louver base 78 moves downward, as shown in Figures 43(B) and 43(C). As a result, the interlocking rod 77 moves downward via the lever support 85 and the action pin 81 supported by the louver base 78, without the lever 86 itself swinging. In other words, the louver base 78, interlocking rod 77, and lever mechanism 80 move downward together, opening the multiple louvers 40 collectively. The swing-open operation of the fire grille 1 and the opening operation of the louvers 40 are carried out simultaneously in parallel.

[0208] According to the fire grille 1 of this embodiment, even if a fire breaks out with the louvers 40 fully closed, heat dissipation from the sash window 2 is not blocked.

[0209] That is, in the fire grille 1 of this example, when the drive mechanism 97 constituting the heat-sensing actuator 37 detects that a predetermined temperature has been reached, it moves the pair of slide members 96a, 96b. This disengages the pair of slide members 96a, 96b from the left and right window frame side engagement parts 11, allowing the fire grille 1 (grating body 36) to swing open in the event of a fire.

[0210] In particular, in this example, the biasing member 103 of the drive mechanism 97 applies a biasing force to one slide member 96a and the other slide member 96b, respectively, to move the pair of slide members 96a, 96b, so that the timing at which one slide member 96a disengages from the window frame engaging part 11 tends to coincide with the timing at which the other slide member 96b disengages from the window frame engaging part 11. This allows the fire grille 1 to swing open smoothly while maintaining the fire grille 1 and sash window 2 parallel to each other.

[0211] As described above, in this example, in the event of a fire, the fire grille 1 can be swung open like a so-called outward-opening window, opening the gap between the top of the sash window 2 and the top of the fire grille 1, allowing the rising high-temperature air to efficiently escape to the outside. As a result, even if a fire occurs with the louvers 40 fully closed, heat dissipation from the sash window 2 can be uninterrupted.

[0212] Since the biasing member 103 is connected to the pair of slide members 96a, 96b via the restricting member 104, the biasing member 103 and the restricting member 104 can be connected in advance. This improves the ease of handling of the drive mechanism 97 and improves the workability of manufacturing the fire grille 1.

[0213] The connection between the relay members 106a, 106b that make up the drive mechanism 97 and the slide members 96a, 96b can be performed by engaging the connection parts 100a, 100b provided on the slide members 96a, 96b with the engaging holes 110a, 110b provided on the relay members 106a, 106b, which also improves the manufacturing efficiency of the fire grille 1.

[0214] Furthermore, the flat connecting portions 100a, 100b are locked without rattle in the rectangular locking holes 110a, 110b provided in the relay members 106a, 106b, which prevents the slide members 96a, 96b from tilting. Therefore, the ends of the slide members 96a, 96b can be positioned appropriately relative to the window-frame-side engaging portion 11.

[0215] In this example, both left and right ends of one biasing member 103 are connected to a pair of slide members 96a, 96b, so that it is possible to apply approximately the same magnitude of biasing force to one slide member 96a and the other slide member 96b. This makes it easier to match the timing at which one slide member 96a and the window frame side engaging portion 11 are disengaged with the timing at which the other slide member 96b and the window frame side engaging portion 11 are disengaged.

[0216] Furthermore, because upper frame 41 constituting frame body 39 is provided with movement limiting portions 47a, 47b that engage with slide members 96a, 96b to limit the amount of movement of slide members 96a, 96b, it is possible to prevent a large difference from occurring between the amount of movement of one slide member 96a and the amount of movement of the other slide member 96b due to the biasing force of biasing member 103. This makes it possible to prevent the slide member 96a (or slide member 96b) with a large amount of movement from disengaging from window-frame-side engaging portion 11, while the slide member 96b (or slide member 96a) with a small amount of movement from not disengaging from window-frame-side engaging portion 11.

[0217] Since the biasing member 103 is made up of a tension spring, which is an elastic member, the manufacturing cost of the drive mechanism 97 can be reduced.

[0218] Because the slide members 96a, 96b are engaged only with the window-frame-side engaging portion 11, the slide members 96a, 96b can be moved smoothly when the slide members 96a, 96b are moved left and right by the drive mechanism 97. This makes it easier to disengage the slide members 96a, 96b from the window-frame-side engaging portion 11.

[0219] Furthermore, because the outer peripheral surfaces of the slide members 96a, 96b, at least the portion that engages with the window-frame-side engaging portion 11, are configured as cylindrical surfaces, even when the outer peripheral surfaces of the slide members 96a, 96b come into contact with the window-frame-side engaging portion 11 due to the influence of thermal expansion or the like, the contact area is kept small. This keeps the frictional force generated between the outer peripheral surfaces of the slide members 96a, 96b and the window-frame-side engaging portion 11 small, allowing the slide members 96a, 96b to be moved with a small force. This makes it easier for the slide members 96a, 96b to disengage from the window-frame-side engaging portion 11.

[0220] The width of the second vertical stile insertion portion 59 is set to at least twice the thickness of the upper extension portion 13 provided with the window-frame-side engaging portion 11, and in this embodiment, approximately seven times the thickness. The vertical dimension of the second vertical stile insertion portion 59 is also set to approximately twice the vertical dimension of the upper extension portion 13. Therefore, the upper extension portion 13 is inserted into the second vertical stile insertion portion 59 with gaps between its both horizontal side surfaces and both vertical end surfaces and the opening edges of the second vertical stile insertion portion 59. This prevents interference between the opening edges of the second vertical stile insertion portion 59 and the upper extension portion 13, even if thermal expansion occurs in the window frame 3 and the frame body 39. Therefore, the upper extension portion 13 is smoothly pulled out of the second vertical stile insertion portion 59 when the fire grille 1 begins to swing. Therefore, the fire grille 1 can be smoothly swung open.

[0221] When the fire grille 1 is in the closed state, the reinforcing metal fittings 60 inside the vertical stiles 43a, 43b are positioned between the window-frame-side engaging portion 11 and the vertical stile first insertion portion 57 in the left-right direction, and are not positioned on the opposite side of the window-frame-side engaging portion 11 from the vertical stile first insertion portion 57 in the left-right direction. Therefore, even if the upper extension portion 13 is displaced in the left-right direction away from the vertical stile first insertion portion 57 due to thermal expansion of the vertical window frames 8a, 8b and the upper window frame 6, as shown by the dashed-dotted line in Figure 20, interference between the upper extension portion 13 and the reinforcing metal fittings 60 can be prevented. Therefore, when the fire grille 1 begins to swing, the upper extension portion 13 is smoothly pulled out of the vertical stile second insertion portion 59.

[0222] Because the fusing member 105, which functions as a thermal fuse, is in contact with or close to the heat transfer member 122, which has high thermal conductivity, such as solid aluminum, it is possible to easily detect a temperature rise in the event of a fire using the fusing member 105. In other words, the temperature of the fusing member 105 can be brought closer to the temperature near the outdoor side of the sash window 2 more quickly and accurately.

[0223] In addition, since the slide members 96a, 96b are positioned inside the upper frame body 48, the slide members 96a, 96b can be protected, and the provision of the slide members 96a, 96b can prevent a reduction in the design freedom of the fire grille 1.

[0224] Since the casing 116 housing the drive mechanism 97 is fixed to the indoor side of the upper frame house inner wall portion 50, providing the drive mechanism 97 prevents a reduction in the design freedom of the fire grille 1. It also prevents the drive mechanism 97 from being operated from the outdoors. Furthermore, in this example, since the drive mechanism 97 is fixed to the other end of the indoor side of the upper frame house inner wall portion 50 on the left-right direction opposite the outer screen 5, the gap between the drive mechanism 97 and the outer screen 5 can be reduced. This makes it easier for the drive mechanism 97 to detect temperature increases in the event of a fire.

[0225] Since the window frame side engagement portion 11 is provided on the window frame upper brackets 9a, 9b which are fixed to the upper ends of the left and right vertical window frames 8a, 8b, the fire grille 1 of this example can be installed on the outdoor side of an existing sash window.

[0226] The window frame side engagement portion 11 is located at the portion of the window frame upper brackets 9a, 9b that is inserted into the left and right vertical frames 43a, 43b when the fire grille 1 is in the closed state, so that the engagement portion between the window frame side engagement portion 11 and the slide members 96a, 96b can be protected.

[0227] In the window frame upper brackets 9a, 9b, the upper second part 17 equipped with the upper clamping part 12 for fixing to the vertical window frames 8a, 8b is made of high-strength stainless steel plate, while the upper first part 16 equipped with the window frame side engaging part 11, which requires less strength than the part fixed to the vertical window frames 8a, 8b, is made of aluminum alloy, which is less expensive than stainless steel plate. This makes it possible to ensure the strength of the window frame upper brackets 9a, 9b while reducing costs.

[0228] Furthermore, in the window frame lower brackets 10a, 10b, the lower second part 26 equipped with the lower clamping part 21 that fastens to the vertical window frames 8a, 8b is made of a high-strength stainless steel plate, while the other lower first part 25 and lower third part 28 are made of an aluminum alloy that is less expensive than stainless steel plate. This makes it possible to ensure the strength of the window frame lower brackets 10a, 10b while reducing costs.

[0229] When the fire grille 1 swings open, the swing angle of the fire grille 1 is restricted by engaging a case-side stopper 129 provided on the storage case 126 constituting the angle restriction means 125 with a wire-side stopper 130 provided on one longitudinal end of the wire 127. This not only allows the angle restriction means 125 to be constructed simply and compactly, but also reliably restricts the swing angle of the fire grille 1. Furthermore, when the fire grille 1 is installed facing a common corridor, setting the swing angle of the fire grille 1 to a small value can ensure the safety of people evacuating through the common corridor in the event of a fire.

[0230] Furthermore, when the fire grille 1 of this example swings open, the louver base 78 and stopper portion 24 that make up the louver opening / closing mechanism 38 are disengaged, and the louver base 78 moves downward due to the biasing force of the biasing member 79. Then, the interlocking rod 77 moves downward, opening multiple louvers 40 all at once. Therefore, the fire grille 1 of this example can further improve heat dissipation from the sash window 2. Moreover, because multiple louvers 40 open almost simultaneously with the fire grille 1 swinging open, heat dissipation from the sash window 2 can be sufficiently ensured.

[0231] The louver base 78 is supported by the vertical frame body 54a of the vertical frame 43a so as not to be movable left and right or indoors and outdoors, and therefore moves downward reliably and quickly when disengaged from the stopper portion 24. This allows the louver 40 to be opened quickly.

[0232] When the fire grille 1 is in the closed state, the biasing force of the biasing member 79 presses the underside of the louver base 78 against the upper surface of the stopper portion 24, and since the stopper portion 24 has an inclined surface 27 on its upper surface that slopes downward as it moves toward the outdoors, the engagement between the louver base 78 and the stopper portion 24 is released while the swing angle of the fire grille 1 is small, in other words, immediately after the fire grille 1 begins to swing. This allows the louvers 40 to be opened quickly.

[0233] When the fire grille 1 is in the closed state, the engagement portion between the louver base 78 and the stopper portion 24 is located on the outdoor side of the pivot 20, which is the center of swing of the fire grille 1. Therefore, from this perspective, the engagement between the louver base 78 and the stopper portion 24 is released while the swing angle of the fire grille 1 is still small.

[0234] The stopper portion 24 is attached to the window frame lower bracket 10a, which is fixed to the bottom of the vertical window frame 8a and supports the stile body 39 so that it can swing. Therefore, the stopper portion 24 can be attached to the vertical window frame 8a simply by fixing the window frame lower bracket 10a to the vertical window frame 8a. This reduces the installation time for the fire grille 1. It also reduces the number of parts.

[0235] When the fire grille 1 is in the closed state, the stopper portion 24 is provided at the tip of the protruding arm portion 32 of the window frame lower bracket 10a that is inserted inside the vertical frame 43a, thereby protecting the engagement portion between the stopper portion 24 and the louver base 78.

[0236] The biasing member 79 is placed between the louver base 78 and the lower end of the vertical frame 43a and applies a downward biasing force to the louver base 78, so that the louver base 78 moves downward faster than if it were to fall due to gravity. This allows the multiple louvers 40 to be opened quickly.

[0237] A pair of louvers 40 arranged on both the left and right sides of the central mullion 64 are connected to each other by a connecting shaft 66 so that they cannot rotate relative to each other, so that even in a structure equipped with the central mullion 64, the louvers 40 arranged on both the left and right sides of the central mullion 64 can be opened together in the event of a fire.

[0238] Since the crankshaft 65 and the connecting shaft 66 are each cut and processed from a blank aluminum alloy plate, the fire resistance performance can be improved compared to when they are made from plastic parts, and the weight and cost of the fire grille 1 can be reduced.

[0239] An inward protrusion 71 is provided on the inner peripheral surface of the insertion hole 70 provided in the louver 40, and an outward protrusion 75 is provided on the outer peripheral surface of each of the insertion shaft portion 72 constituting the crankshaft 65 and the connecting insertion shaft portion 76 constituting the connecting shaft 66, thereby preventing the insertion shaft portion 72 and the connecting insertion shaft portion 76 from slipping out of the insertion hole 70. Furthermore, of the outward protrusion 75, the front side surface in the insertion direction of the insertion shaft portion 72 and the connecting insertion shaft portion 76 into the insertion hole 70 is inclined toward the opposite side with respect to the insertion direction of the insertion shaft portion 72 and the connecting insertion shaft portion 76 into the insertion hole 70 as it moves from the radially inner side to the radially outer side. This reduces frictional resistance when the insertion shaft portion 72 and the connecting insertion shaft portion 76 are inserted into the insertion hole 70, and prevents the insertion shaft portion 72 and the connecting insertion shaft portion 76 from slipping out of the insertion hole 70.

[0240] When implementing a fire grille according to one aspect of the present disclosure, by changing the structure of the lower window frame bracket, when the fire grille swings open, it is possible to create an opening not only between the top of the sash window and the top of the fire grille, but also between the bottom of the sash window and the bottom of the fire grille.

[0241] Although the embodiments of the present disclosure have been described above, the invention of the present disclosure is not limited to these and can be modified as appropriate within the scope of the technical concept of the invention. [Explanation of symbols]

[0242] 1 Fire protection grid 2 sash windows 3. Window Frame 4 Inner Shoji Screen 5. Outer Shoji Screen 6 Window top frame 7 Window sill 8a, 8b window vertical frame 9a, 9b Window frame upper bracket 10a, 10b Window frame bottom bracket 11 Window frame side engagement portion 12 Upper clamping part 13 Upper overhang 14 Upper clamping groove 15 Vertical frame fin piece 16 Upper first part 17 Upper second part 18 Upper overlapping plate section 19 Upper board 20 Axis 21 Lower clamping part 22 Anti-slip flange 23 Lower clamping groove 24 Stopper part 25 Lower first part 26 Lower second part 27 Slope 28 Lower third part 29 Lower first overlapping plate section 30 Bend 31 Lower board 32 Overhanging arm 33 Lower third overlapping plate section 36 Surface grille body 37 Heat-sensitive actuator 38 Louver opening and closing mechanism 39 Frame 40 Louver 41 Upper stile 42 Lower stile 43a, 43b stiles 44 Outdoor side frame 45 Indoor frame 46 Screen door 47a, 47b Movement restriction section 48 Upper frame body 49 Upper stile blockage piece 50 Upper frame inner wall 51a, 51b Insertion holes 52 Lower frame body 53 Lower stile blockage piece 54a, 54b Vertical frame body 55a, 55b vertical stile blocker 56 Vertical frame inner wall 57 Vertical frame first insertion part 58 Vertical frame inner wall 59 Second vertical frame insertion part 60 Reinforcement metal fittings 61 Insertion part 62 Third vertical frame insertion part 63 Engagement receiving portion 64 Neutral mullion 65 crankshaft 65x crankshaft blank 66 Connecting shaft 66x connecting shaft blank 67 Support pin 68 Louver body 69 Support cylinder part 70 Insertion hole 71 Introvert process 72 Insertion shaft 73 Support shaft part 74 Connecting part 75 Extrovert process 76 Connecting insertion shaft 77 Interlocking rod 78 Louver base 79 Force applying member 80 Lever mechanism 81 Action pin 82 Locking groove 83 Locking part 84 Protrusion 85 Lever support 86 Lever 87 Mounting part 88 Angle adjustment section 89 Intermediate protrusion 90 screws 91 Fulcrum pin 92 Knob 93 Pin insertion hole 94 Pin engagement hole 95 Locking pin 96a, 96b Slide members 97 Drive Mechanism 98 Gap 99 Guide part 100a, 100b connection 101a, 101b Slide member body 102 Fastening members 103 biasing member 104 Regulatory member 105 Melting material 106a, 106b relay members 107a, 107b Mounting plate part 108a, 108b overlapping plate section 109a, 109b Retractable section 110a, 110b locking hole 111a, 111b fixing screws 112 volts 113 Nut 114a, 114b Mounting screws 115 Penetration 116 Casing 117 Engagement claw 118 Engagement hole 119 Bottom plate part 120 Guide groove 121 Mounting screw 122 Heat transfer components 123 Indoor side panel 124 bis 125 Angle control means 126 Storage Case 127 Wire 128 Opening 129 Case side stopper 130 Wire side stopper 131 Pressing member 132 Mounting bracket

Claims

1. a surface grille body having a rectangular frame-shaped frame body supported so as to be swingable relative to a lower portion of a window frame constituting a sash window, and a plurality of louvers supported on the inside of the frame body; a heat-sensing operating device that engages with window frame-side engaging portions provided at the top of each of the left and right window vertical frames of the window frame to hold the surface grille body in a closed position, and that, when a predetermined temperature is reached, releases the engagement with the window frame-side engaging portions to allow the surface grille body to swing open; Equipped with The heat-sensing operating device includes a pair of slide members that can be engaged with and disengaged from the left and right window frame side engaging portions and can move in the left and right direction, and a biasing member that applies a biasing force to one slide member and the other slide member of the pair of slide members, respectively, and a drive mechanism that moves the pair of slide members to release the engagement between the pair of slide members and the left and right window frame side engaging portions when the predetermined temperature is reached. Fire safety grid.

2. 2. The fire grille of claim 1, wherein the drive mechanism includes a restricting member that prevents movement of the pair of sliding members until the predetermined temperature is reached, and that releases the restriction on movement of the pair of sliding members when the predetermined temperature is reached.

3. The fire grille according to claim 2 , wherein the restricting member includes a melting member that melts or melts and cuts when the predetermined temperature is reached.

4. 4. The fire grate of claim 3, wherein the drive mechanism further comprises a heat transfer member disposed in contact with or in proximity to the fusing member.

5. 3. The fire grille according to claim 2, wherein the biasing member is connected to the pair of slide members via the restricting member.

6. The pair of vertical frames constituting the frame body each have a first vertical frame insertion portion penetrating in the left-right direction and a second vertical frame insertion portion penetrating in the indoor-outdoor direction, When the grille body is in a closed state, the end of the slide member inserted into the vertical frame through the vertical frame first insertion portion is engaged with the window frame side engagement portion inserted into the vertical frame through the vertical frame second insertion portion.

2. The fire grate of claim 1.

7. The vertical frame has a reinforcing metal fitting therein having an insertion portion through which the end of the slide member can be inserted, The reinforcing metal fitting is disposed between the window frame side engaging portion and the vertical stile first insertion portion in the left-right direction when the surface grille body is in a closed state.

7. The fire grate of claim 6.

8. 7. The fire grille according to claim 6, wherein the width dimension in the left-right direction of the second vertical stile insertion portion is at least twice the thickness dimension in the left-right direction of the window frame side engagement portion.

9. 2. The fire grille according to claim 1, wherein at least the outer peripheral surfaces of the pair of slide members that engage with the window frame side engaging portions are configured as cylindrical surfaces.

10. 2. The fire grille according to claim 1, wherein the frame body has a pair of movement limiting portions that engage with the pair of slide members to limit the amount of movement of the pair of slide members.

11. The fire grille according to claim 1 , wherein the biasing member is an elastic member.

12. 12. The fire grate of claim 11, wherein the biasing member comprises a tension spring.

13. further comprising angle restriction means for restricting the opening angle of the surface grating body; The angle restriction means comprises a storage case fixed to the frame body, and a wire whose end on one side in the length direction is disposed inside the storage case and whose end on the other side in the length direction is fixed directly or indirectly to the window frame, The storage case has a case-side stopper, The wire has a wire-side stopper that engages with the case-side stopper at one end in the length direction to prevent the end on one side in the length direction from slipping out of the storage case.

2. The fire grate of claim 1.

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