Fire-prevention planar lattice

Abstract

To provide a fire-prevention planar lattice which can make heat-releasing through a sash window uninterrupted even when a fire breaks out with the louver completely closed.SOLUTION: A fire-prevention planar lattice comprises a planar lattice body 34 and a heat-sensing operation device 35. The planar lattice body 34 comprises: a frame body 36; a louver 37; a linkage rod 69; a crank shaft 62 of which one end is fixed to the louver 37 while the other end being rotatably supported with the linkage rod 69; a base member 78 having a base-side engagement part 82; and a lever 79 which opens and closes the louver 37 by moving the linkage rod 69 relatively in the up-down direction against the base member 78. The heat-sensing operation device 35 holds the base member 78 in a normal position by engaging with the base-side engagement part 82, and, upon a designated temperature being reached, releases the engagement with the base-side engagement part 82 to enable a relative movement of the base member 78 in the up-down direction to open the louver 37.SELECTED DRAWING: Figure 43

Description

[Technical field]

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

[0002] Traditionally, in apartment complexes and other collective housing, sash windows have been installed facing the common corridors for the purpose of indoor ventilation, lighting, etc. Furthermore, grilles are installed on the exterior side of sash windows facing the common corridors to ensure crime prevention and privacy.

[0003] Various types of grilles have been known in the past, but the use of louver grilles with openable louvers, as described in JP 2009-46868 A and other publications, has been increasing in recent years because they allow for freely adjustable ventilation, light blocking, etc. On the other hand, there has been a demand in recent years for grilles with improved fire resistance to prevent the spread of fire in the event of a fire. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-46868 A Summary of the Invention [Problem to be solved by the invention]

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

[0006] To solve the above-mentioned problems, the present invention aims to provide a fireproof grille that does not block heat dissipation from the 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 invention is installed on the outdoor side of a sash window, and comprises a grille body and a heat-sensing actuator. The grille body has a rectangular frame body, a plurality of louvers, an interlocking rod, a plurality of crankshafts, a base member, and a lever. The multiple louvers are arranged in parallel in the vertical direction inside the frame body, and each is supported so as to be able to rotate around a central axis arranged horizontally relative to the vertical frames that make up the frame body. The interlocking rod is disposed inside the vertical frame and moves vertically relative to the vertical frame to open and close the multiple louvers. The base member supports the interlocking rod so as to allow relative movement in the vertical direction, has a base side engagement portion, and is disposed inside the vertical frame. The heat-sensing operating device engages with the base side engaging portion to support the base member in the correct position, and when a predetermined temperature is reached, it disengages from the base side engaging portion to allow relative vertical movement of the base member relative to the vertical frame, thereby opening the multiple louvers.

[0008] In one embodiment of the fireproof grille of the present invention, a lever may be further provided which engages with the interlocking rod and is supported so as to be swingable in the vertical direction relative to the base member, and which opens and closes the multiple louvers by moving the interlocking rod in the vertical direction relative to the base member. A fireproof grille according to one embodiment of the present invention may further include a biasing member that applies a downward force to the base member, and when the predetermined temperature is reached, the base member can be moved downward relative to the vertical frame.

[0009] In one embodiment of the fire grille of the present invention, the heat-sensing operating device has an operating mechanism that constitutes a link mechanism and a drive mechanism that operates the operating mechanism, and the operating mechanism can have a slide member that can be engaged and disengaged with the base side engagement portion and can move in the left-right direction.

[0010] In the fire grille according to one aspect of the present invention, the base-side engaging portion can be provided at the upper end of the base member, and the operating mechanism can be disposed inside the upper frame constituting the frame body. The left and right ends of the slide member can be inserted into the vertical frame.

[0011] In one embodiment of the fireproof grille of the present invention, the fireproof grille may further include a plurality of crank shafts, each of which has a crank shape, one end of which is arranged coaxially with the central axis of the louver and fixed so as not to be rotatable relative to the louver, and the other end of which is supported rotatably relative to the interlocking rod. In the fire grille according to one aspect of the present invention, the crankshaft may be a cut product from a crank plate.

[0012] In the fire grille according to one aspect of the present invention, the louvers may have a louver body having a corrugated plate shape and a support tube portion having an insertion hole and integrally provided with the louver body. Also, the crankshaft may be entirely made of an aluminum alloy and have an insertion shaft portion inserted into the insertion hole. The insertion hole may be a rectangular hole, and the insertion shaft portion may have a cross-sectional shape that matches the insertion hole.

[0013] In the fire grate according to one aspect of the present invention, one or more outward projections may be provided on an outer circumferential surface of the insertion shaft portion. In this case, the outward projection can be extended in a direction perpendicular to the insertion direction of the insertion shaft portion.

[0014] In the fire grille according to one aspect of the present invention, one or more inward projections may be provided on the inner peripheral surface of the insertion hole. In this case, the inward projection can be extended in the direction of the central axis of the insertion hole.

[0015] In one embodiment of the fireproof grille of the present invention, one or more outward protrusions are provided on the outer peripheral surface of the insertion shaft portion, and one or more inward protrusions are provided on the inner peripheral surface of the insertion hole that faces the outward protrusions, and the outward protrusions and the inward protrusions can be perpendicular to each other.

[0016] In one embodiment of the fireproof grille of the present invention, the frame body further includes a central mullion, and among the plurality of louvers, a pair of louvers arranged on both the left and right sides of the central mullion can be connected to each other so as not to rotate relative to each other via a connecting shaft supported rotatably relative to the central mullion. Effect of the Invention

[0017] According to the fireproof grille of the present invention, even if a fire breaks out with the louvers fully closed, heat dissipation from the sash window is not blocked. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram of a fire grate according to a first embodiment as viewed from the outdoor side. [Diagram 2] FIG. 2 is a vertical cross-sectional view of a fire grille according to a first embodiment. [Diagram 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. [Diagram 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, viewed from the indoor side, with some members 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. [Figure 15] FIG. 15 is an oblique view showing an upper window frame bracket according to a first example of an embodiment, where (A) shows an upper window frame bracket on one side in the left-right direction, and (B) shows an upper window frame bracket on the other side in the left-right direction. [Figure 16] FIG. 16 is a perspective view shown for explaining a manufacturing process of an upper bracket body that constitutes the window frame upper bracket according to the first example of the embodiment. [Figure 17] FIG. 17 is an oblique view showing a window frame lower bracket according to a first example of an embodiment, where (A) shows the window frame lower bracket on one side in the left-right direction, and (B) shows the window frame lower bracket on the other side in the left-right direction. [Figure 18] FIG. 18 is a perspective view shown for explaining a manufacturing process of a lower bracket body constituting the window frame lower bracket according to the first example of the embodiment. [Figure 19] FIG. 19 is an enlarged view of the upper left portion of FIG. [Figure 20] Figure 20(A) is an oblique view corresponding to the lower right part of Figure 11, showing the state in which a lower frame blocking piece has been attached to the fire grille shown in Figure 11, and Figure 20(B) is an oblique view showing a modified example in which an insect net has been attached. [Figure 21] FIG. 21 is a perspective view showing an assembly of a louver and a crankshaft according to a first example of the embodiment. [Figure 22] FIG. 22(A) is an end view showing a louver according to a first example of the embodiment, and FIG. 22(B) is a partially enlarged view of FIG. 22(A). [Figure 23] FIG. 23 is a perspective view of the first example of the embodiment, showing the respective engagement states of the slide member with the window-frame-side engagement portion and the base-side engagement portion, with the frame body omitted. [Figure 24] FIG. 24(A) is a diagram showing a crankshaft according to a first example of the embodiment, and FIG. 24(B) is a partially enlarged view of FIG. 24(A). [Diagram 25] FIG. 25 is a perspective view shown for explaining a manufacturing process of the crankshaft according to the first example of the embodiment. [Figure 26] FIG. 26 is a perspective view of the first example of the embodiment, showing a process of inserting the insertion shaft portion of the crankshaft into the insertion hole of the louver. [Figure 27] FIG. 27 is a perspective view showing a state in which a pair of louvers arranged on both the left and right sides of a central mullion are connected by a connecting shaft, with the central mullion omitted, in the first embodiment. [Figure 28] FIG. 28(A) is a diagram showing a connecting shaft according to a first example of the embodiment, and FIG. 28(B) is a partially enlarged view of FIG. 28(A). [Figure 29] FIG. 29 is a perspective view shown for explaining a manufacturing process of the connecting shaft according to the first example of the embodiment. [Diagram 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 accordance with the first example of the embodiment. [Diagram 31] FIG. 31 is an oblique view showing the opening and closing operation of the louvers based on lever operation in the first example of the embodiment, where (A) shows the louvers in a closed state, and (B) shows the louvers in an open state. [Diagram 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 in the first example of the embodiment, where (A) shows the louvers in a closed state and (B) shows the louvers in an open state. [Diagram 33]FIG. 33 is a perspective view showing a lower bracket of a surface grille according to a first example of an embodiment, where (A) shows the lower bracket of a surface grille on one side in the left-right direction, and (B) shows the bracket of a surface grille on the other side in the left-right direction. [Diagram 34] Figure 34 is an oblique view showing the positional relationship between the lower bracket of the grille and the lower bracket of the window frame in the normal state for the first example of the embodiment, where (A) shows the lower bracket of the grille and the lower bracket of the window frame on one side in the left-right direction, and (B) shows the lower bracket of the grille and the lower bracket of the window frame on the other side in the left-right direction. [Diagram 35] Figure 35 is an oblique view of the upper part of a fire grille in accordance with a first example of an embodiment, viewed from the outdoor side, where (A) shows the normal state before the heat detection activation device is activated, and (B) shows the state after the heat detection activation device has been activated. [Diagram 36] FIG. 36 is a perspective view showing an actuation mechanism according to a first example of an embodiment, where (A) shows a state before actuation and (B) shows a state after actuation. [Figure 37] FIG. 37 is a perspective view showing a drive mechanism according to a first example of an embodiment, where (A) shows a state before operation and (B) shows a state after operation. [Figure 38] FIG. 38 is an exploded perspective view of a drive mechanism according to a first example of the embodiment. As shown in FIG. [Figure 39] FIG. 39 is a diagram illustrating an angle restriction means according to the first example of the embodiment. [Diagram 40] FIG. 40 is a perspective view of a storage case for the angle restriction means according to the first example of the embodiment. [Diagram 41] FIG. 41 is a vertical cross-sectional view showing, in time series order (A) and (B), an example of a change in the position of a fire grille and an opening operation of louvers when a fire occurs, in the first example of the embodiment. [Diagram 42] FIG. 42 is a perspective view showing the positional relationship between the grille lower bracket and the window frame lower bracket in chronological order of (A) and (B) when a fire occurs, in relation to the first example of the embodiment. [Diagram 43]Figure 43 is a perspective view showing, in chronological order (A) and (B), how the base side engagement portion and the slide member are disengaged and the louvers are opened when a fire occurs, in the first example of the embodiment. [Diagram 44] Figure 44 is a side view showing, in chronological order (A) and (B), the changes in the lever and its surrounding components when the base side engagement portion and the slide member are disengaged and the louvers are opened in the event of a fire, in relation to the first example of the embodiment. [Diagram 45] FIG. 45 is a diagram showing a second example of the embodiment, and corresponds to FIG. [Diagram 46] FIG. 46 is a diagram showing a second example of the embodiment, and corresponds to FIG. [Figure 47] Figure 47 is an oblique view showing the engagement mode between the window frame lower bracket and the engagement receiving portion of the vertical frame for the second example of the embodiment, where (A) shows the engagement mode between the window frame lower bracket on one side in the left-right direction and the engagement receiving portion, and (B) shows the engagement mode between the window frame lower bracket on the other side in the left-right direction and the engagement receiving portion. [Figure 48] FIG. 48 is a diagram showing a second example of the embodiment, and corresponds to FIG. [Figure 49] FIG. 49 is a vertical cross-sectional view showing a change in the position of the fire grille and an opening operation of the louvers in the event of a fire in a time series in the order of (A) and (B) in the second example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] [First Example of Implementation] The first example of the embodiment will be described with reference to FIGS. 1 to 44.

[0020] The fire grille 1 of this example is installed on the outdoor side of a sash window 2 installed facing a common corridor in an apartment building, for example, and has the function of automatically opening the louvers 37 in the event of a fire, so as not to impede the dissipation of heat from the sash window 2. Below, the structure of the sash window 2 will be explained, and then the structure of the fire grille 1 will be explained.

[0021] In the following explanation, the up-down direction and the left-right direction refer to the respective directions when the fire grille 1 and the sash window 2 are viewed from the front. Therefore, the up-down direction corresponds to the height direction of the fire grille 1 and the sash window 2, and the left-right direction corresponds to the width direction of the fire grille 1 and the sash window 2. Furthermore, the inside in the left-right direction refers to the center side in the width direction of the fire grille 1 and the sash window 2, and the outside in the left-right direction refers to the outside in the width direction of the fire grille 1 and the sash window 2. Furthermore, the indoor / outdoor direction refers to the depth direction (outside the surface direction, thickness direction) of the fire grille 1 and the sash window 2. Furthermore, unless otherwise specified, each direction refers to the respective direction when the fire grille 1 and the sash window 2 are installed in a building such as an apartment building.

[0022] [Sash windows] The sash window 2 comprises a window frame 3 and an inner sash 4 and an outer sash 5 fitted inside the window frame 3.

[0023] <window frame> The window frame 3 is configured in a rectangular frame shape (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. Each of the upper window frame 6, the lower window frame 7, and the vertical window frames 8a, 8b is made of an aluminum alloy.

[0024] 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 for installing the fire grille 1 on the outdoor side of the sash window 2 so that it can be swung open.

[0025] 《Window frame upper bracket》 The upper window frame brackets 9a, 9b work in cooperation with a heat-sensing operating device 35 (described below) provided on the fire grille 1 to hold the fire grille 1 in a closed position under normal conditions, and to enable the fire grille 1 to swing open in the event of a fire.

[0026] 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 Fig. 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 Fig. 3) are attached at the same vertical mounting positions.

[0027] The pair of upper window frame brackets 9a, 9b are symmetrical to each other in the left-right direction. As shown in Fig. 15, each of the upper window frame brackets 9a, 9b has a generally L-shaped side shape when viewed in the left-right direction, and has an upper protruding plate portion 11 that protrudes toward the outdoors and an upper mounting portion 12 that extends in the vertical direction.

[0028] The upper overhanging plate portion 11 is configured as a substantially rectangular plate, and is disposed with its plate thickness oriented in the left-right direction. The indoor end of the upper overhanging plate portion 11 is connected to the upper end of the upper mounting portion 12. The upper overhanging plate portion 11 has a window frame side engagement portion 13 in the middle in the indoor-outdoor direction. In this example, the window frame side engagement portion 13 is configured as a substantially rectangular cutout that opens on the upper end surface and both left and right side surfaces of the upper overhanging plate portion 11. However, the shape of the window frame side engagement portion 13 is not limited to a cutout, and other shapes such as a through hole (including a slit) with a closed periphery or a hook shape can be adopted as long as it can be engaged with and disengaged from the slide members 101a and 101b described later that move in the left-right direction.

[0029] The upper mounting portion 12 is a portion that fixes the window frame upper brackets 9a, 9b to the vertical window frames 8a, 8b, and has an upper clamping portion 14 having a substantially U-shaped end face shape. The upper clamping portion 14 has an upper clamping groove 15 that opens outward in the left-right direction and extends in the up-down direction.

[0030] 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 16 provided on the vertical window frames 8a, 8b into the inside of the upper clamping groove 15 and clamping the vertical frame fin pieces 16 from both indoor and outdoor sides with the upper clamping portion 14.

[0031] The window frame upper brackets 9a and 9b of this example are composed of a plurality of members. Each of the window frame upper brackets 9a and 9b is composed of two parts: an upper bracket body 17 and an upper punch anchor 18.

[0032] As shown in Fig. 16, the upper bracket body 17 is a machined product (pressed product) made from an upper bracket blank 17x, which is an aluminum alloy extruded material, and is made up of an upper protruding plate portion 11 with a window-frame-side engaging portion 13, and an upper mounting base plate 19 extending downward from the indoor-side end of the upper protruding plate portion 11. The upper punch anchor 18 is made of stainless steel plate and has an upper clamping portion 14. Therefore, the upper mounting portions 12 of the window-frame upper brackets 9a, 9b are constructed by fixing the upper punch anchor 18 to the upper mounting base plate 19 of the upper bracket body 17. Note that in this example, the upper punch anchor 18 is fixed to the upper mounting base plate 19 using a screw 20, but it may also be fixed by other fixing means such as welding.

[0033] When implementing the present invention, the window frame upper bracket can be omitted by directly providing the window frame side engagement portion on the upper end portion of the vertical window frame.

[0034] Window frame bottom bracket The window frame lower brackets 10a, 10b work in cooperation with the grille lower brackets 39a, 39b described later 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-tilting window.

[0035] Furthermore, in this example, when the fire grille 1 is swung open, not only is there an opening between the upper part of the sash window 2 and the upper part of the fire grille 1, but also the lower part of the sash window 2 and the lower part of the fire grille 1, so that a lower sliding mechanism for the fire grille 1 is formed by the window frame lower brackets 10a, 10b and the grille lower brackets 39a, 39b.

[0036] The window frame lower brackets 10a, 10b are attached to the 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 positions in the up-down direction.

[0037] The window frame lower brackets 10a, 10b are symmetrical to each other in the left-right direction. As shown in Fig. 17, each of the window frame lower brackets 10a, 10b has a generally L-shaped side shape when viewed in the left-right direction, and has a lower protruding plate portion 21 that protrudes toward the outdoors and a lower mounting portion 22 that extends in the up-down direction.

[0038] The lower protruding plate portion 21 has a substantially J-shape when viewed in the left-right direction, and is disposed with its plate thickness oriented in the left-right direction. The indoor end of the lower protruding plate portion 21 is connected to the lower end of the lower mounting portion 22. The lower protruding plate portion 21 has an inclined guide portion 23, an engagement receiving portion 24, and a pin receiving portion 25.

[0039] The inclined guide portion 23 is provided on the upper edge of the lower protruding plate portion 21. The inclined guide portion 23 is inclined in a direction gradually decreasing downward as it approaches the outdoor side. The inclination angle of the inclined guide portion 23 can be set, for example, in the range of 5 degrees to 20 degrees, and is 10 degrees in the illustrated example.

[0040] The engagement receiving portion 24 is provided on the outdoor side portion of the upper end portion of the lower protruding plate portion 21. The engagement receiving portion 24 is configured in a notch shape and opens to the indoor side. The outdoor side end portion of the inclined guide portion 23 is connected to the engagement receiving portion 24. In this example, a hook portion 26 that is approximately L-shaped in side view is provided on the upper end portion of the outdoor side end portion of the lower protruding plate portion 21, and the portion surrounded on three sides by the hook portion 26 and the outdoor side end portion of the inclined guide portion 23 serves as the engagement receiving portion 24.

[0041] The pin receiving portion 25 is provided at the lower end of the outdoor end of the lower overhanging plate portion 21. The pin receiving portion 25 is a protruding piece that protrudes downward and has a protruding amount that allows it to be engaged and disengaged with a support pin 95, which will be described later.

[0042] The lower mounting portion 22 is a portion that fixes the window frame lower brackets 10a, 10b to the vertical window frames 8a, 8b, and has a lower clamping portion 27 having a substantially U-shaped end face shape. The lower clamping portion 27 has a lower clamping groove 28 that opens outward in the left-right direction and extends in the up-down direction.

[0043] 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 vertical frame fin pieces 16 provided on each of the window vertical frames 8a, 8b into the inside of the lower clamping grooves 28 and clamping the vertical frame fin pieces 16 from both indoor and outdoor sides by the lower clamping portions 27.

[0044] The window frame lower brackets 10a and 10b of this example are composed of a plurality of members. Each of the window frame lower brackets 10a and 10b is composed of two parts: a lower bracket body 29 and a lower punch anchor 30.

[0045] As shown in Fig. 18, the lower bracket body 29 is a machined product (pressed product) made from a lower bracket blank 29x, which is an extruded aluminum alloy material, and is made up of a lower protruding plate portion 21 and a lower mounting base plate 31 extending upward from the indoor end of the lower protruding plate portion 21. The lower punch anchor 30 is made of stainless steel plate and has a lower clamping portion 27. Therefore, the lower mounting portion 22 of the window frame lower brackets 10a, 10b is formed by fixing the lower punch anchor 30 to the lower mounting base plate 31 of the lower bracket body 29. Note that in this example, the lower punch anchor 30 is fixed to the lower mounting base plate 31 using the screw 20, but it may also be fixed by other fixing means such as welding.

[0046] (Inner and outer screens) The inner and outer shoji screens 4 and 5 are fitted inside the window frame 3 in a sliding manner so that they can move left and right (horizontally).

[0047] As shown in Fig. 2, the inner screen 4 and the outer screen 5 are composed of rectangular screen frames 32a, 32b and rectangular glass panels 33a, 33b fitted inside the screen frames 32a, 32b. Each of the frames (upper frame, lower frame, door end frame, and door frame) that make up the screen frames 32a, 32b is made of aluminum alloy.

[0048] The inner screen 4 is set into the indoor side of the window frame 3 so as to be movable left and right, and the outer screen 5 is set into the outdoor side of the window frame 3 so as to be movable left and right. When the inner screen 4 and the outer screen 5 are each moved to the closed position, the inner screen 4 blocks one half of the left and right side of the opening of the window frame 3, and the outer screen 5 blocks the other half of the left and right side of the opening of the window frame 3.

[0049] When implementing the present invention, the structure of the sash window is not limited to the sliding type, but other structures such as a fixed window, an inward-opening window, or an inward-tilting window can also be used.

[0050] [Fire protection grid] The fire grille 1 is installed on the outdoor side of a sash window 2 to ensure crime prevention and privacy, and together with the sash window 2 constitutes a window device.

[0051] The fire grille 1 of this example is roughly divided into a grille body 34 and a heat-sensing actuator 35. In this example, since the heat-sensing actuator 35 is provided in the grille body 34 as described later, no distinction will be made between the fire grille 1 and the grille body 34 in the explanation of the posture.

[0052] The fire grille 1 is supported on the outdoor side of the sash window 2 so that it can swing, and is normally held in a closed position (parallel to the sash window 2, completely covering the sash window 2 from the outdoor side) by a heat-sensing actuator 35, but in the event of a fire, the heat-sensing actuator 35 is activated to swing the grille open. In this example, the center of gravity of the fire grille 1 is located on the outdoor side of a pivot 94, which will be described later and serves as the center of swing when the swing starts, so that when the heat-sensing actuator 35 is activated, the fire grille 1 starts swinging open without receiving a biasing force from a biasing means or the like. Furthermore, in the case of the fire grille 1 of this example, when the heat-sensing actuator 35 is activated in the event of a fire, the multiple louvers 37 are opened all at once.

[0053] Below, we will explain each component that constitutes the fire grille 1 of this example. Note that the fire grille 1 of this example changes its posture between normal times and when a fire occurs, but we will explain the structure based on the normal state before the heat-sensing actuator 35 is activated, and then we will explain the operation of the heat-sensing actuator 35 and the behavior of the fire grille 1 after the heat-sensing actuator 35 is activated.

[0054] <Lattice body> The grille main body 34 comprises a frame body 36, a plurality of louvers 37 supported inside the frame body 36 so as to be openable and closable, a louver opening and closing mechanism 38, and a pair of grille lower brackets 39a, 39b.

[0055] "Frame body" The frame body 36 is supported so as to be able to swing relative to the lower portion of the window frame 3 that constitutes the sash window 2. The frame body 36 is configured in a rectangular frame shape by an upper frame 40, a lower frame 41, and left and right vertical frames 42a, 42b. The frame body 36 includes a rectangular outdoor frame body 43 arranged on the outdoor side, and a rectangular indoor frame body 44 arranged on the indoor side.

[0056] A number of louvers 37 are supported inside the outdoor frame body 43. A screen door 45 is attached to the indoor side of the louvers 37 so as to cover the opening of the outdoor frame body 43. Therefore, the indoor frame body 44 covers all four sides of the space between the screen door 45 and the inner and outer screens 4 and 5, ensuring visibility from the outdoors and insect protection.

[0057] The upper frame 40 consists of an upper frame body 46 and an upper frame closing piece 47, each of which is made of an aluminum alloy.

[0058] The upper frame body 46 is configured in a substantially rectangular tubular shape and forms the upper side of the outdoor side frame body 43. Both left and right end portions of the upper frame body 46 are connected to the upper end portions of left and right vertical frame bodies 55a, 55b described later.

[0059] As shown in Fig. 19, the upper frame body 46 has an upper frame insertion part 49 penetrating in the indoor / outdoor direction on the other left-right side of the upper frame inner wall part 48 arranged on the indoor side. The upper frame insertion part 49 is composed of a slit-shaped long hole that is long in the left-right direction. An engagement claw 103 provided on a slide member 101b (described later) that constitutes the heat-sensing actuator 35 is inserted into the upper frame insertion part 49 so as to be movable in the left-right direction.

[0060] The upper frame blocking piece 47 is configured in a substantially flat plate shape, is disposed on the indoor side of the upper frame body 46, and forms the upper edge of the indoor frame body 44. When the fire grille 1 is in a closed state, the upper frame blocking piece 47 blocks the space between the upper frame body 46 and the window upper frame 6. Both left and right ends of the upper frame blocking piece 47 are connected to the upper ends of the main body parts of the left and right vertical frame blocking pieces 56a, 56b, which will be described later. Note that, although the upper frame body 46 and the upper frame blocking piece 47 are configured as a single unit in this example, they may also be configured as separate pieces.

[0061] The lower frame 41 consists of a lower frame main body 50 and a lower frame closing piece 51, each of which is made of an aluminum alloy.

[0062] The lower frame body 50 is configured in a substantially rectangular tubular shape and forms the lower side of the outdoor side frame body 43. Both left and right end portions of the lower frame body 50 are connected to the lower end portions of left and right vertical frame bodies 55a, 55b described later.

[0063] The bottom frame blocking piece 51 is formed in a substantially flat plate shape, is disposed on the indoor side of the bottom frame body 50, and forms the lower side of the indoor frame body 44. The bottom frame blocking piece 51 blocks the gap between the bottom frame body 50 and the window bottom frame 7 when the fireproof grille 1 is closed. As shown in FIG. 20(A), the bottom frame blocking piece 51 has a plurality of slit-shaped exhaust holes 54, each of which is long in the indoor / outdoor direction, arranged in the left-right direction. The left-right width (slit width) of the exhaust holes 54 is about 1 mm to 2 mm (preferably about 1.2 mm to 1.5 mm) from the viewpoint of ensuring insect resistance. The left-right ends of the bottom frame blocking piece 51 are connected to the lower ends of the left and right vertical frame blocking pieces 56a and 56b described later. In this example, the bottom frame body 50 and the bottom frame blocking piece 51 are integrally formed, but they may be formed separately. Furthermore, as in the modified example shown in FIG. 20(B), when an insect net 131 or the like is provided on the indoor side (upper surface) of the lower frame closing piece 51, the slit width of the exhaust hole 54 can be made 2 mm or more.

[0064] The vertical frames 42a, 42b each consist of a vertical frame main body 55a, 55b and a vertical frame closing piece 56a, 56b, both made of an aluminum alloy.

[0065] The vertical frame bodies 55a, 55b are configured in a substantially rectangular tubular shape and form the left and right vertical sides of the outdoor side frame body 43. The upper end portions of the vertical frame bodies 55a, 55b are connected to the left and right ends of the upper frame body 46, and the lower end portions of the vertical frame bodies 55a, 55b are connected to the left and right ends of the lower frame body 50. The vertical frame bodies 55a, 55b are configured from multiple members (two in the illustrated example).

[0066] As shown in Fig. 14, the vertical frame bodies 55a, 55b have a vertical frame first insertion portion 58 penetrating in the left-right direction at the upper end of the vertical frame inner wall portion 57 located on the inside in the left-right direction. The vertical frame first insertion portion 58 is configured as a slit-shaped long hole that is long in the up-down direction. Ends of slide members 101a, 101b (described later) that constitute the heat-sensing actuator 35 are inserted in the left-right direction into the vertical frame first insertion portion 58.

[0067] As shown in Fig. 12, the vertical frame bodies 55a, 55b have a vertical frame second insertion portion 60 that penetrates in the indoor / outdoor direction at the upper end of the vertical frame inner wall portion 59 arranged on the indoor side. The vertical frame second insertion portion 60 is configured as a notch that is long in the vertical direction and opens on the upper end surface and both indoor / outdoor side surfaces of the vertical frame inner wall portion 59. Under normal conditions, the outdoor side portion of the upper protruding plate portion 11 that constitutes the window frame upper brackets 9a, 9b is inserted into the vertical frame second insertion portion 60.

[0068] As shown in Fig. 13, the vertical frame bodies 55a, 55b have a vertical frame third insertion portion 61 penetrating in the indoor / outdoor direction at the lower end of the vertical frame house inner wall portion 59. The vertical frame third insertion portion 61 is formed by a notch that is long in the vertical direction and opens at the lower end face and both indoor / outdoor side faces of the vertical frame house inner wall portion 59. The outdoor side portion of the lower protruding plate portion 21 that constitutes the window frame lower brackets 10a, 10b is inserted into the vertical frame third insertion portion 61.

[0069] The vertical frame blocking pieces 56a, 56b are configured to have a substantially L-shaped cross section and are fixed to the indoor side surfaces of the vertical frame bodies 55a, 55b. The vertical frame blocking pieces 56a, 56b form the left and right vertical sides of the indoor side frame body 44. The vertical frame blocking pieces 56a, 56b block the gap between the vertical frame bodies 55a, 55b and the vertical window frames 8a, 8b when the fire grille 1 is in a closed state. The upper ends of the vertical frame blocking pieces 56a, 56b are connected to the left and right ends of the upper frame blocking piece 47, and the lower ends of the vertical frame blocking pieces 56a, 56b are connected to the left and right ends of the lower frame blocking piece 51. In this example, the vertical frame bodies 55a, 55b and the vertical frame blocking pieces 56a, 56b are configured separately, but they may be configured integrally.

[0070] The frame body 36 of this example further includes a middle mullion 53. The middle mullion 53 is configured in a substantially rectangular tube shape. The upper end of the middle mullion 53 is connected to the left-right middle part of the upper frame body 46, and the lower end of the middle mullion 53 is connected to the left-right middle part of the lower frame body 50. As a result, the middle mullion 53 divides the opening of the outdoor side frame body 43 into two, left and right parts.

[0071] "Luva" The louvers 37 are supported so as to be openable and closable inside the outdoor side frame body 43 that constitutes the frame body 36. The louvers 37 are strip-shaped members, and are arranged in parallel in the vertical direction with their longitudinal directions oriented in the left-right direction.

[0072] In this example, as shown in Figures 4, 31, etc., the louvers 37 are arranged in multiples on both the left and right sides of the middle mullion 53. The left and right ends of the louvers 37 are supported on the vertical frame 42a (or 42b) and the middle mullion 53 so as to be rotatable about a central axis arranged in the horizontal direction.

[0073] Specifically, the multiple louvers 37 in one row on the left-right side have their ends on one left-right side rotatably supported (pivoted) via a crankshaft 62 to the vertical frame body 55a, and their ends on the other left-right side rotatably supported via a connecting shaft 63 to the central mullion 53. In contrast, the multiple louvers 37 in the other row on the left-right side have their ends on one left-right side rotatably supported via the connecting shaft 63 to the central mullion 53, and their ends on the other left-right side rotatably supported via a support pin 64 to the vertical frame body 55b.

[0074] A pair of louvers 37 arranged on both the left and right sides of the central mullion 53 are connected to each other so as not to rotate relative to each other via a connecting shaft 63 that is rotatably supported on the central mullion 53. Therefore, as shown in Figure 31, the multiple sets of louvers 37 arranged on both the left and right sides of the central mullion 53 rotate synchronously.

[0075] Each of the louvers 37 is made of an aluminum alloy, and as shown in Fig. 22, is composed of a louver body 65 having a long corrugated plate shape, and a support cylinder portion 66 provided on the back surface of the louver body 65. The louver body 65 and the support cylinder portion 66 are integrally formed with each other.

[0076] The support cylinder portion 66 is provided over the entire length in the longitudinal direction of the louver body 65. The support cylinder portion 66 is configured in a square tube shape, and has an insertion hole 67 in the center.

[0077] The central axis of the insertion hole 67 is disposed in the horizontal direction. In this example, the insertion hole 67 is a rectangular hole having a rectangular cross-sectional shape. A plurality of inward protrusions 68 are provided on the inner peripheral surface of the insertion hole 67. Specifically, among the four inner side surfaces constituting the inner peripheral surface of the insertion hole 67, a pair of inner side surfaces facing each other are each provided with an inward protrusion 68. The inward protrusions 68 extend in the central axis direction of the insertion hole 67. In other words, the inward protrusions 68 extend in the insertion direction of the insertion shaft portion 71 (described later) constituting the crankshaft 62. The multiple inward protrusions 68 are disposed parallel to each other.

[0078] <Louver opening and closing mechanism> The louver opening / closing mechanism 38 is used to open and close multiple louvers 37 in synchronization (collectively), and has multiple crank shafts 62, multiple connecting shafts 63, an interlocking rod 69, and a lever mechanism section 70.

[0079] (Crankshaft) The crankshaft 62 is made of an aluminum alloy and has a crank shape. As shown in Fig. 25, the crankshaft 62 is a cut product (pressed product) from a crankshaft blank 62x, which is an aluminum alloy crank plate (extruded material), and is composed of an insertion shaft portion 71, a support shaft portion 72, and a connecting portion 73. The crankshaft 62, except for the insertion shaft portion 71, is disposed inside the vertical frame 42a (vertical frame main body 55a) on one side in the left-right direction.

[0080] The insertion shaft portion 71 and the support shaft portion 72 are disposed in the horizontal direction and are disposed parallel to each other. The connecting portion 73 connects the proximal ends of the insertion shaft portion 71 and the support shaft portion 72 to each other in the left-right direction.

[0081] The insertion shaft portion 71 has a rectangular columnar shape, and is provided on the other left-right side of the crankshaft 62. The insertion shaft portion 71 has a rectangular cross-sectional shape that matches the insertion hole 67 provided in the louver 37.

[0082] The insertion shaft 71 is inserted in the left-right direction through a through hole (not shown) provided in the vertical frame inner wall portion 57, and is supported so as to be rotatable only relative to the vertical frame inner wall portion 57. The insertion shaft 71 is disposed coaxially with the central axis of each of the insertion holes 67 of the louvers 37 in one row on one side in the left-right direction, and is press-fitted into the insertion holes 67 so as not to be rotatable relative to the louvers 37 in one row on the left-right direction. As a result, the insertion shaft 71 is fixed so as not to be rotatable relative to the louvers 37 in the one row on the left-right direction.

[0083] The outer peripheral surface of the insertion shaft portion 71 is provided with a plurality of outward projections 74. Specifically, outward projections 74 are provided on each of a pair of outer peripheral surfaces facing opposite to each other among the four outer surfaces constituting the outer peripheral surface of the insertion shaft portion 71. The outward projections 74 extend in a direction perpendicular to the insertion direction of the insertion shaft portion 71 into the insertion hole 67. That is, the outward projections 74 extend in the circumferential direction of the insertion shaft portion 71. The plurality of outward projections 74 are arranged parallel to each other. In addition, the side surface on one side in the left-right direction of the outward projections 74 is inclined in a direction from the tip side to the base end side of the insertion shaft portion 71 as it goes from the radial inner side to the radial outer side of the insertion shaft portion 71. That is, the side surface on one side in the left-right direction of the outward projections 74 is inclined in a direction opposite to the insertion direction of the insertion shaft portion 71 into the insertion hole 67.

[0084] In this example, the inward protrusions 68 and the outward protrusions 74 are arranged so as to be perpendicular to each other when the insertion shaft portion 71 is inserted (press-fitted) into the insertion hole 67. Then, the tip portions of the inward protrusions 68 plastically deform the tip portions of the outward protrusions 74, thereby tightly engaging the inward protrusions 68 and the outward protrusions 74.

[0085] The support shaft portion 72 has a rectangular columnar shape, and is provided on one left-right side of the crankshaft 62. The support shaft portion 72 is supported by the interlocking rod 69 so as to be rotatable relative to the interlocking rod 69.

[0086] (Connection shaft) The connecting shaft 63 is made of an aluminum alloy and has a linear shape. As shown in Fig. 29, the connecting shaft 63 is a cut product (pressed product) from a connecting shaft blank 63x, which is an aluminum alloy flat plate (extruded material), and has a pair of connecting insertion shaft portions 75 on both left and right sides. The left-right intermediate portion of the connecting shaft 63 is supported by the center mullion 53 so as to be rotatable only.

[0087] The connecting insertion shaft portion 75 has a rectangular column shape and has a rectangular cross-sectional shape that matches the insertion hole 67 provided in the louvers 37. In this example, the connecting insertion shaft portion 75 on one side in the left-right direction is arranged coaxially with the center axis of the insertion hole 67 provided in the louvers 37 in one row on the left-right direction, and is press-fitted into the insertion hole 67 so as not to rotate relative to the louvers 37. The connecting insertion shaft portion 75 on the other side in the left-right direction is arranged coaxially with the center axis of the insertion hole 67 provided in the louvers 37 in the other row on the left-right direction, and is press-fitted into the insertion hole 67 so as not to rotate relative to the louvers 37. As a result, the connecting insertion shaft portion 75 on one side in the left-right direction is fixed so as not to rotate relative to the louvers 37 in the one row on the left-right direction, and the connecting insertion shaft portion 75 on the other side in the left-right direction is fixed so as not to rotate relative to the louvers 37 in the other row on the left-right direction.

[0088] The outer peripheral surface of the connecting insertion shaft portion 75 is provided with a plurality of outward projections 76. Specifically, outward projections 76 are provided on each of a pair of outer peripheral surfaces facing opposite each other among the four outer surfaces constituting the outer peripheral surface of the connecting insertion shaft portion 75. The outward projections 76 extend in a direction perpendicular to the insertion direction of the connecting insertion shaft portion 75 into the insertion hole 67. That is, the outward projections 76 extend in the circumferential direction of the connecting insertion shaft portion 75. The plurality of outward projections 76 are arranged parallel to each other. In addition, the front side surface of the outward projections 76 in the insertion direction of the connecting insertion shaft portion 75 into the insertion hole 67 is inclined in the direction from the tip side to the base side of the connecting insertion shaft portion 75 as it moves from the radial inner side to the radial outer side of the connecting insertion shaft portion 75. That is, the front side surface of the outward projections 76 in the insertion direction of the connecting insertion shaft portion 75 into the insertion hole 67 is inclined in the opposite direction to the insertion direction of the connecting insertion shaft portion 75 into the insertion hole 67. Specifically, the side surface of one of the connecting insertion shaft portions 75 on one side in the left-right direction inclines in the direction toward the other side in the left-right direction as it moves from the radial inside to the radial outside of the connecting insertion shaft portion 75, and the side surface of the other of the connecting insertion shaft portions 75 on the other side in the left-right direction inclines in the direction toward one side in the left-right direction as it moves from the radial inside to the radial outside of the connecting insertion shaft portion 75.

[0089] In this example, when the connecting insertion shaft portion 75 is inserted (press-fitted) into the insertion hole 67, the inward protrusion 68 and the outward protrusion 76 are arranged so as to be perpendicular to each other. Then, the tip portions of the inward protrusions 68 plastically deform the tip portions of the outward protrusions 76, thereby tightly engaging the inward protrusions 68 and the outward protrusions 76. If the opening area of ​​the opening in which the fire grate is to be installed is small, the center mullion and the connecting shaft can be omitted from the fire grate.

[0090] (interlocking rod) The interlocking rod 69 is configured in a rectangular flat plate shape, and is disposed inside the vertical frame 42a (vertical frame main body 55a) on one side in the left-right direction with its lengthwise direction facing up-down and its plate thickness direction facing left-right. The interlocking rod 69 moves up-down relative to the vertical frame 42a on one side in the left-right direction, thereby opening and closing the multiple louvers 37. An action pin 77 with a central axis facing horizontally is fixed to a part of the vertical direction of the interlocking rod 69.

[0091] The interlocking rod 69 rotatably supports the support shaft portions 72 of the crankshafts 62. Therefore, when the interlocking rod 69 moves in the vertical direction, the crankshafts 62 rotate about their respective insertion shaft portions 71. This makes it possible to open and close the multiple louvers 37 collectively. Specifically, as shown in Figures 31(A) and 32(A), when the interlocking rod 69 is moved upward, the multiple louvers 37 can be closed collectively, and as shown in Figures 31(B) and 32(B), when the interlocking rod 69 is moved downward, the multiple louvers 37 can be opened collectively.

[0092] (Lever mechanism) As shown in FIG. 23, the lever mechanism 70 has a base member 78 and a lever 79 supported so as to be swingable in the vertical direction relative to the base member 78, and has the function of moving the interlocking rod 69 in the vertical direction relative to the base member 78.

[0093] The base member 78, like the interlocking rod 69, is disposed inside the vertical frame 42a (vertical frame main body 55a) on one side in the left-right direction, and includes a base 80 having a base-side engagement portion 82, and a lever support portion 81. The base member 78 supports the interlocking rod 69 so as to enable relative movement in the up-down direction.

[0094] The base 80 is configured in a rectangular flat plate shape, and is disposed inside the vertical frame body 55a so as to be movable in the vertical direction, with its longitudinal direction facing the up-down direction and its plate thickness direction facing the indoor / outdoor direction. The base 80 is disposed on the indoor side of the interlocking rod 69. A tension spring 83, which corresponds to a biasing member, is suspended between the base 80 and the lower frame 41. As a result, a downward elastic force is applied to the base 80 from the tension spring 83.

[0095] The base-side engagement portion 82 is configured in a generally J-shaped hook shape, and is provided on the upper end portion of the base 80. The base-side engagement portion 82 is disposed adjacent to the window-frame-side engagement portion 13 provided on the window-frame upper bracket 9a on one side in the left-right direction.

[0096] An end of a slide member 101a (described later) is engaged in the vertical direction with the base-side engaging portion 82. This prevents the base 80 from moving downward regardless of the elastic force applied by the tension spring 83, and supports the base 80 in the correct position. In the event of a fire, the engagement between the base-side engaging portion 82 and the end of the slide member 101a is released.

[0097] The lever support portion 81 has a substantially T-shaped side shape when viewed in the left-right direction, and has a pair of attachment portions 84, an angle adjustment portion 85, and an intermediate protrusion portion 86.

[0098] The pair of mounting portions 84 are provided on both upper and lower ends of the lever support portion 81. The lever support portion 81 is fixed to the base 80 by using screws 87 that are inserted through each of the pair of mounting portions 84.

[0099] The angle adjustment portion 85 is for adjusting and maintaining the swing angle of the lever 79, and is provided on the indoor end surface of the vertical middle portion of the lever support portion 81. The angle adjustment portion 85 has an uneven shape with multiple concave portions and multiple convex portions arranged alternately in the vertical direction. In the louver opening / closing mechanism 38 of this example, the swing angle of the lever 79, in other words, the opening angle of the louver 37, can be adjusted in stages by the number of concave portions that make up the angle adjustment portion 85.

[0100] The intermediate protrusion 86 protrudes toward the outdoor side from the vertical middle part of the lever support part 81. A fulcrum pin 88 is fixed to the tip of the intermediate protrusion 86, and the central axis of the fulcrum pin 88 is arranged in the horizontal direction.

[0101] (lever) The lever 79 is supported on the lever support portion 81 so as to be able to swing vertically, and has a knob portion 89 at the indoor end, a pin insertion hole 90 at the outdoor end, a pin engagement hole 91 between the knob portion 89 and the pin insertion hole 90, and a locking pin 92 between the pin engagement hole 91 and the knob portion 89.

[0102] The pin insertion hole 90 is an elongated hole that is long in the longitudinal direction of the lever 79. The fulcrum pin 88 is inserted into the pin insertion hole 90 so as to be movable in the longitudinal direction of the lever 79.

[0103] The pin engagement hole 91 is an elongated hole that is long in the longitudinal direction of the lever 79. An action pin 77 provided on the interlocking rod 69 is engaged with the pin engagement hole 91 so as to be movable in the longitudinal direction of the lever 79.

[0104] The locking pin 92 is locked in a recess of the angle adjustment part 85 provided on the lever support part 81, and keeps the swing angle of the lever 79 constant. In this example, to prevent the locking pin 92 from accidentally falling out of the recess of the angle adjustment part 85, an elastic member is hung between the lever 79 and an intermediate protrusion 86 provided on the lever support part 81.

[0105] In this example, the lever 79 can be swung up and down about the fulcrum pin 88 to open and close the multiple louvers 37 collectively. That is, by swinging the lever 79 up and down about the fulcrum pin 88, the action pin 77 of the interlocking rod 69 is moved up and down, and the multiple louvers 37 supported by the interlocking rod 69 via the crankshaft 62 are opened and closed collectively. For example, as shown in Figures 31(A) and 32(A), when the lever 79 is swung upward so as to lift the knob portion 89, the multiple louvers 37 can be closed collectively, and when the lever 79 is swung downward so as to lower the knob portion 89, the multiple louvers 37 can be opened collectively.

[0106] {Lower bracket for grille} The grille lower brackets 39a, 39b cooperate with the window frame lower brackets 10a, 10b to support the lower end of the fire grille 1 so that it can swing relative to the window frame 3 in order to allow the fire grille 1 to swing open like a so-called outward-tilting window in the event of a fire. In this example, the grille lower brackets 39a, 39b, together with the window frame lower brackets 10a, 10b, form a lower slide mechanism for the fire grille 1.

[0107] The grille lower brackets 39a, 39b are attached to the lower ends of the left and right vertical frames 42a, 42b, respectively, as shown in Fig. 33. The grille lower bracket 39a attached to the vertical frame 42a on one side in the left-right direction and the grille lower bracket 39b attached to the vertical frame 42b on the other side in the left-right direction are attached at the same positions in the up-down direction.

[0108] The grille lower brackets 39a, 39b are symmetrical to each other in the left-right direction. Each of the grille lower brackets 39a, 39b has a bracket frame 93 having a substantially U-shaped end face shape when viewed in the indoor / outdoor direction, a pivot 94, and a support pin 95.

[0109] The bracket frame 93 is made up of a pair of side plates 96a, 96b and a connecting plate 97. One side plate 96a has a substantially L-shaped side surface when viewed from the left and right, and is fixed to the inner side surfaces of the lower ends of the vertical frames 42a, 42b in the left and right direction using a plurality of screws 98. The other side plate 96b has a substantially rectangular side surface when viewed from the left and right, and is disposed substantially parallel to the side plate 96a with a gap in the left and right direction at a portion facing the outdoor end of the one side plate 96a. The connecting plate 97 connects the lower ends of the pair of side plates 96a, 96b to each other in the left and right direction.

[0110] The pivot 94 is fixed to the indoor side of one of the side panels 96a with its central axis facing horizontally. The pivot 94 can slide in the indoor / outdoor direction along the inclined guides 23 provided on the window frame lower brackets 10a, 10b, and can engage with the engagement receiving parts 24. The pivot 94 serves as the swing center when the fire grille 1 starts to swing. The pivot 94 also serves as the sliding part when the fire grille 1 slides to the outdoor side, and serves as the support axis after the fire grille 1 finishes swinging.

[0111] The support pin 95 is suspended between the outdoor ends of the pair of side plate portions 96a, 96b with its central axis oriented horizontally. The support pin 95 is parallel to the pivot 94 and disposed below the pivot 94. The support pin 95 is engageable with and disengageable from the pin receiving portion 25 provided on the window frame lower brackets 10a, 10b.

[0112] As shown in Fig. 34, the lower overhanging plate 21 constituting the window frame lower brackets 10a, 10b is disposed between the pair of side plate portions 96a, 96b. When the fire grille 1 is in the closed state, the pivot 94 is engaged (placed) from above with the indoor side portion of the inclined guide portion 23 provided on the upper edge of the lower overhanging plate 21, and the support pin 95 is engaged from the indoor side with the pin receiving portion 25 provided on the outdoor side end of the lower overhanging plate 21. This allows the weight of the fire grille 1 to be supported by the window frame 3, and prevents the lower end of the fire grille 1 from moving to the outdoor side.

[0113] When implementing the present invention, the lower bracket of the grille may be omitted, and the pivot and support pin may be provided directly on the vertical frame.

[0114] <Heat-sensing actuator> As shown in FIG. 35, the heat-sensing actuator 35 of this example comprises an operating mechanism 99 and a drive mechanism 100 that operates the operating mechanism 99, and is installed on the upper frame 40 that constitutes the grille body 34.

[0115] The heat sensing actuator 35 of this embodiment performs the following two functions. The first function is to hold the fire grille 1 in a closed position under normal circumstances, and to swing the fire grille 1 open in the event of a fire. The second function is to open the multiple louvers 37 collectively in the event of a fire.

[0116] In order to realize the first function, the heat sensing operating device 35 engages with the window frame side engaging portion 13 provided on the upper part of each of the left and right vertical window frames 8a, 8b of the window frame 3 to hold the fire grille 1 (grating body 34) in the closed position, and when a predetermined temperature is reached, it releases the engagement with the window frame side engaging portion 13 to enable the fire grille 1 (grating body 34) to swing open.

[0117] In order to realize the second function, the heat-sensing operating device 35 engages with a base side engaging portion 82 provided on the base member 78 of the louver opening and closing mechanism 38 to support the base member 78 in the correct position, and when a predetermined temperature is reached, it disengages from the base side engaging portion 82 to allow relative vertical movement of the base member 78 with respect to the vertical frame 42a, thereby opening the multiple louvers 37 together.

[0118] In addition, when carrying out the present invention, the heat sensing actuator may be caused to perform only one of the first function and the second function.

[0119] Actuation Mechanism The operating mechanism 99 is disposed inside the upper frame body 46 that constitutes the upper frame 40. The operating mechanism 99 in this example constitutes a link mechanism and has a pair of slide members 101a, 101b that can slide left and right, and a rotating plate 102 that can rotate around a central axis of rotation.

[0120] (Slide member) The sliding members 101a, 101b have a shape that allows them to be engaged with and disengaged from the window frame side engagement parts 13 provided on the left and right window vertical frames 8a, 8b, respectively. In this example, the window frame side engagement parts 13 are configured with substantially rectangular cutouts, and therefore, the sliding members 101a, 101b are each configured with a rectangular long plate as shown in Fig. 36. Each of the sliding members 101a, 101b is disposed inside the upper frame body 46 with its longitudinal direction facing the left-right direction and its plate thickness direction facing the indoor-outdoor direction.

[0121] The proximal end (base end) of each of the slide members 101a and 101b is rotatably supported on the opposite side of the rotation center axis in the rotating plate 102. In other words, the end on the other side of the left-right direction of the slide member 101a arranged on one side in the left-right direction and the end on one side of the left-right direction of the slide member 101b arranged on the other side in the left-right direction are rotatably supported on the opposite side of the rotation center axis in the rotating plate 102. Therefore, the pair of slide members 101a and 101b can move synchronously in opposite directions to each other in the left-right direction by rotating the rotating plate 102 about the rotation center axis.

[0122] The distal end (tip) of each of the slide members 101a and 101b is inserted into the inside of the vertical frame main body 55a and 55b through the vertical frame first insertion portion 58 formed on the vertical frame inner wall portion 57 of the left and right vertical frames 42a and 42b, as shown in Figures 14 and 35(A). In other words, one end of the slide member 101a in the left-right direction is inserted into the inside of the vertical frame main body 55a, and the other end of the slide member 101b in the left-right direction is inserted into the inside of the vertical frame main body 55b.

[0123] In normal operation, one end of the slide member 101a in the left-right direction engages with the window frame side engaging part 13 provided on the window frame upper bracket 9a in the indoor / outdoor direction, and the other end of the slide member 101b in the left-right direction engages with the window frame side engaging part 13 provided on the window frame upper bracket 9b in the indoor / outdoor direction. Specifically, the left-right ends of the slide members 101a and 101b, which are rectangular plates, are inserted in the left-right direction through the notched window frame side engaging part 13. This prevents the fire grille 1 from swinging so as to fall to the outdoors, and holds the fire grille 1 in the closed position.

[0124] 23, one end of the slide member 101a in the left-right direction is engaged in the up-down direction with a base-side engagement portion 82 provided on the base member 78 constituting the louver opening / closing mechanism 38. In other words, the hook-shaped base-side engagement portion 82 is hooked from above onto one end of the slide member 101a in the left-right direction. This prevents the base member 78 from moving downward with respect to the vertical frame 42a, regardless of the biasing force of the tension spring 83 attached to the base 80 constituting the base member 78, and supports the base member 78 in the correct position.

[0125] In this example, the pair of slide members 101a, 101b have different length dimensions. In this example, as described later, the drive mechanism 100 is attached to the other end of the upper frame 40 in the left-right direction, so that of the slide members 101a, 101b, the slide member 101a arranged at a position farther from the drive mechanism 100 is longer than the slide member 101b arranged near the drive mechanism 100. When the drive mechanism is arranged on one side of the upper frame in the left-right direction, the slide member on one side in the left-right direction is made shorter than the slide member on the other side in the left-right direction, and when the drive mechanism is arranged at the center position in the left-right direction of the upper frame, the pair of slide members have the same length.

[0126] A bifurcated engagement claw 103 is provided on the indoor side of the slide member 101b arranged near the drive mechanism 100. The indoor side portion of the engagement claw 103 is arranged indoors relative to the upper frame inner wall portion 48 through the upper frame insertion portion 49 formed in the upper frame inner wall portion 48 of the upper frame main body 46, as shown in FIG.

[0127] (Turning disk) The rotating plate 102 has a central axis of rotation facing the indoor / outdoor direction and is rotatably supported in a portion closer to the other left or right direction inside the upper frame body 46. The central axis of rotation of the rotating plate is not limited to the indoor / outdoor direction and can be arranged to face, for example, in the vertical direction.

[0128] The rotating plate 102 is configured in a disk shape, and is rotatably supported on an L-shaped plate-shaped base 105 fixed to the upper frame body 46 by means of a support pin 104 inserted through the center.

[0129] The proximal ends of the slide members 101a and 101b are rotatably supported by the pivot pins 106a and 106b on both sides (parts with a phase difference of 180 degrees) of the rotating plate 102 sandwiching the central axis of rotation. Therefore, the pair of slide members 101a and 101b connected via the rotating plate 102 can move synchronously in opposite directions in the left-right direction. In other words, when one slide member 101a (or 101b) moves to one side in the left-right direction, the other slide member 101b (or 101a) moves to the other side in the left-right direction, and when one slide member 101a (or 101b) moves to the other side in the left-right direction, the other slide member 101b (or 101a) moves to one side in the left-right direction.

[0130] Driving mechanism When a fire breaks out and a predetermined temperature is reached, the drive mechanism 100 activates the operating mechanism 99. The drive mechanism 100 of this example moves only one slide member 101b constituting the operating mechanism 99 in the left-right direction. Particularly in this example, the drive mechanism 100 moves one slide member 101b to one side in the left-right direction, which is a direction in which the slide member approaches the other slide member 101a.

[0131] When carrying out the present invention, depending on the engagement state between the slide members and the window frame side engagement portion, the drive mechanism can also move one slide member in a direction away from the other slide member.

[0132] The drive mechanism 100 is fixed to the indoor side of the upper frame body 46. Specifically, the drive mechanism 100 is fixed to the other end of the indoor side of the upper frame indoor inner wall portion 48 of the upper frame body 46, which is opposite the upper frame of the outer sash 5 in the indoor / outdoor direction.

[0133] As shown in FIGS. 37 and 38, the drive mechanism 100 includes a casing 107, a movable plate 108, a fixed plate 109, an elastic member 110, a heat transfer member 111, a melting member 112, and a drive pin 113.

[0134] (Casing) The casing 107 has a rectangular casing body 114 and a flat mounting flange portion 115 .

[0135] The casing body 114 is open at the top, and a pair of inner sides facing each other in the indoor / outdoor direction are each formed with a guide groove 116 extending in the left-right direction. The casing body 114 is provided with a guide hole 117 (see FIG. 19) formed of a long hole extending in the left-right direction in the bottom plate portion disposed at the bottom.

[0136] Mounting flange portion 115 is provided so as to hang down from the outdoor end portion of casing body 114. Casing 107 is fixed to upper frame body 46 by fixing mounting flange portion 115 to upper frame inner wall portion 48 with a plurality of screws 118 (see FIG. 19).

[0137] (movable plate) The movable plate 108 has a generally square shape when viewed in the up-down direction, and is engaged with the pair of guide grooves 116 so as to be movable in the left-right direction. That is, the movable plate 108 has an elongated hole that penetrates in the up-down direction and extends in the left-right direction. The movable plate 108 also has a movable-side protrusion 119 at an end on the other left-right side, and a hook-shaped movable-side engagement portion 120 at an end on one left-right side.

[0138] (Fixed plate) The fixed plate 109 is engaged with the other left-right end of the pair of guide grooves 116, and is immovably fixed to the casing body 114. The fixed plate 109 has a fixed-side protrusion 121 at one left-right end. When implementing the present invention, the fixed plate can be omitted by directly providing a fixed-side protrusion on a part of the casing body.

[0139] (Elastic material) The elastic member 110 is composed of a compression coil spring, and is disposed between the movable plate 108 and the fixed plate 109. Specifically, the elastic member 110 is sandwiched in a compressed and deformed state between the movable plate 108 and the fixed plate 109 by inserting and locking a movable-side convex portion 119 into the inside of one end of the elastic member 110 in the left-right direction and a fixed-side convex portion 121 into the inside of the end of the elastic member 110 in the other left-right direction. This causes the elastic member 110 to apply an elastic force to the movable plate 108 in the left-right direction.

[0140] (Heat transfer material) The heat transfer member 111 is a metal part having high thermal conductivity such as solid aluminum, and is fixed to the casing body 114 in the middle in the left-right direction. The heat transfer member 111 is arranged inside the movable plate 108 so as not to hinder the movement of the movable plate 108. Specifically, a screw 134 is inserted vertically through a circular hole provided in the bottom plate of the casing body 114, an elongated hole provided in the movable plate 108, a circular hole 132 provided in the heat transfer member 111, and a circular hole 133 provided at the end of the other left-right direction of the melting member 112 described later, and a nut 135 is screwed onto the screw 134, thereby fixing the heat transfer member 111 to the casing body 114 without hindering the left-right movement of the movable plate 108. The heat transfer member may be omitted. In this case, the end of the melting member may be fixed to the casing body instead of the heat transfer member.

[0141] (Melting material) Melting member 112 is made of a low-melting-point alloy and has a lower melting point than the other members constituting drive mechanism 100. Melting member 112 is a temperature fuse that melts when a predetermined temperature (for example, about 60°C to 120°C) is reached, and functions as a temperature sensor that detects when the predetermined temperature is reached.

[0142] Melting member 112 is made of a thin plate, and before melting, is attached so as to span movable plate 108 and heat transfer member 111. In this way, melting member 112 prevents movable plate 108 from moving to one side in the left-right direction due to the elastic force applied to movable plate 108 by elastic member 110.

[0143] The other left-right end of the melting member 112 is fixed to the heat transfer member 111 with a bolt. One left-right end of the melting member 112 engages with one left-right end of the movable-side engaging part 120. That is, an engaging hole 122 provided at one left-right end of the melting member 112 engages with the movable-side engaging part 120 provided at one left-right end of the movable-side engaging part 120. With the melting member 112 attached so as to span between the movable plate 108 and the heat transfer member 111, most of the lower surface of the melting member 112 is in surface contact with the upper surface of the heat transfer member 111.

[0144] The entire melting member 112 does not have to be a thermal fuse. As long as it can be melted when a predetermined temperature is reached, a thermal fuse may be used in a part of the melting member 112. In that case, a copper-based alloy or the like may be used for both ends.

[0145] (Drive pin) The drive pin 113 is composed of a screw (truss screw) with a head. The drive pin 113 is fixed to the movable plate 108 by a screw with its central axis facing the up-down direction. The lower portion of the drive pin 113 protrudes downward from the casing body 114 through a guide hole 117. The lower portion of the drive pin 113 engages in the left-right direction with a bifurcated engagement claw 103 provided on the slide member 101b.

[0146] In the driving mechanism 100 of this example, in normal operation, the melting member 112 is attached to the movable plate 108 and the heat transfer member 111 fixed to the casing body 114 so as to bridge them, and the left-right movement of the movable plate 108 and the driving pin 113 is prevented by the melting member 112. Therefore, the left-right movement of the slide member 101b having the engagement claw 103 engaged with the driving pin 113, and the slide member 101a connected to the slide member 101b via the rotating disk 102 are also prevented. This prevents the slide members 101a, 101b from disengaging from the window frame side engagement part 13, and stably holds the fire grille 1 in the closed position.

[0147] <Angle restriction means> The fire grille 1 of this embodiment further includes an angle restriction means 123 between the fire grille 1 and the window frame 3 in order to restrict the opening angle (degree of opening) of the fire grille 1.

[0148] As shown in FIG. 39, the angle restriction means 123 is made up of a storage case 124 and a wire 125.

[0149] Storage case 124 is fixed inside vertical frame main body 55a. Storage case 124 has a hook portion 126 and a storage portion 127. Hook portion 126 is formed of a truss screw with a head, and is fixed to storage case 124 with its central axis facing horizontally. Storage portion 127 is disposed below hook portion 126.

[0150] The wire 125 has one end in the length direction fixed to a portion of the storage case 124 above the hook portion 126, and the other end in the length direction passes under the hook portion 126 from the outdoor side to the indoor side, and is fixed directly or indirectly to the window frame 3. That is, the middle part of the wire 125 passes under the hook portion 126 in the indoor-outdoor direction. In this example, the one end of the wire 125 in the length direction is fixed by a screw 128 to a portion of the storage case 124 above the hook portion 126 and on the indoor side, and the other end of the wire 125 in the length direction is fixed to the window frame upper bracket 9a fixed to the vertical window frame 8a. When the fire grille 1 is in the closed state, the middle part of the wire 125 bends in an approximately U-shape as viewed in the left-right direction, is stored in the storage portion 127, and is hung from below the hook portion 126 when the fire grille 1 is in the open state (pushes up the hook portion 126).

[0151] As shown in Figure 41 (B), when the fire grille 1 swings open, the angle restriction means 123 restricts the opening angle by tensioning the wire 125 between the fire grille 1 and the upper window frame bracket 9a. The opening angle of the fire grille 1 can be changed by changing the length of the wire, 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 degrees to 40 degrees.

[0152] [Explanation of operation of heat sensing actuator] In the drive mechanism 100 of the heat sensing actuator 35 of this example, when a fire breaks out and the melting member 112, which is a thermal fuse, reaches a predetermined temperature and melts, as shown in Fig. 37(A)->(B), the elasticity of the elastic member 110 moves the movable plate 108 and the drive pin 113 to one side in the left-right direction relative to the casing 107. Then, only one slide member 101b having the engagement claw 103 engaged with the drive pin 113 is moved to one side in the left-right direction, which is the direction approaching the other slide member 101a.

[0153] As a result, as shown in (A)→(B) of FIG. 36, the pair of slide members 101a and 101b connected via the rotating disk 102 are moved toward each other. That is, the slide member 101a arranged on one side in the left-right direction is moved to the other side in the left-right direction, and the slide member 101b arranged on the other side in the left-right direction is moved to one side in the left-right direction. Then, as shown in (A)→(B) of FIG. 35, the ends of the slide members 101a and 101b are pulled out in the left-right direction from the window frame side engaging portion 13, and the engagement between the slide members 101a and 101b and the window frame side engaging portion 13 in the indoor / outdoor direction is released. This allows the fire grille 1 to swing open.

[0154] In this example, the pivot 94 is located at the bottom of the indoor end of the fire grille 1, so that the center of gravity of the fire grille 1 is located on the outdoor side of the pivot 94, and when the engagement between the slide members 101a, 101b and the window frame side engagement parts 13 is released, the fire grille 1 immediately swings open as shown in Figure 41(A). If the center of gravity of the fire grille 1 is located on the indoor side of the pivot 94, for example, a biasing means for biasing the fire grille 1 toward the outdoor side may be provided between the fire grille 1 and the window frame 3, so that the fire grille can be swung open when the engagement between the slide members and the window frame side engagement parts is released.

[0155] 43(A)→(B), the end of the slide member 101a is pulled out from the base-side engagement portion 82 to the other left-right side, and the vertical engagement between the slide member 101a and the base-side engagement portion 82 is released. This allows the base member 78 to move vertically relative to the vertical frame 42a.

[0156] In this example, a tension spring 83 is stretched between the base 80 and the lower frame 41 that constitute the base member 78, and a downward elastic force is applied to the base 80. Therefore, when the engagement between the slide member 101a and the base side engagement part 82 is released, as shown in Figures 43(B) and 44(B), the base member 78 and the lever mechanism part 70 move downward relative to the vertical frame 42a, and the lever 79 itself does not swing, but the interlocking rod 69 moves downward via the action pin 77, so that the multiple louvers 37 can be opened all at once. As shown in Figure 41, the swing-opening action of the fire grille, the sliding movement of the fire grille, and the opening action of the louvers are performed simultaneously in parallel.

[0157] [Explanation of the operation of the grille body] In this example, when the heat-sensing actuator 35 is actuated and the sliding members 101a, 101b are disengaged from the window frame side engaging parts 13, the fire grille 1 starts to swing about the pivot 94 provided on the grille lower brackets 39a, 39b as the swing center, as shown in Figure 41(A). More specifically, as shown in Figure 42(A), the fire grille 1 is swung about the pivot 94 in the direction in which the support pin 95 comes out of the pin receiving part 25 downward.

[0158] Then, when the engagement between the support pin 95 and the pin receiver 25 is released, the fire grille 1 advances its swinging motion (increases the opening angle) and, as shown in Figures 41(B) and 42(B), the pivot 94 slides toward the outdoors along the inclined guide 23 provided on the upper edge of the lower projection 21, causing the fire grille 1 to slide toward the outdoors under its own weight. The fire grille 1 continues to slide until the pivot 94 engages with the engagement receiver 24 provided on the lower projection 21. In other words, the engagement receiver 24 functions as a stopper for the fire grille 1 to slide.

[0159] If there is still bending in the wire 125 constituting the angle restriction means 123 at the time when the pivot 94 engages with the engagement receiving portion 24, the fire grille 1 will continue to swing around the pivot 94 as the swing center. On the other hand, if there is no bending remaining in the wire 125, the fire grille 1 will not swing.

[0160] When the pivot 94 engages with the engagement receiving portion 24 and the sliding and swinging motion of the fire grille 1 is stopped, the fire grille 1 is supported by the window frame lower brackets 10a, 10b with the pivot 94 as a support axis. In addition, a wide opening is formed between the bottom frame 41 and the window frame 7 that constitute the fire grille 1.

[0161] According to the fire grille 1 of this embodiment as described above, even if a fire breaks out with the louvers 37 fully closed, heat dissipation from the sash window 2 is not blocked.

[0162] That is, when the drive mechanism 100 constituting the heat-sensing actuator 35 detects that a predetermined temperature has been reached, the fire grille 1 of this example releases the engagement between the slide member 101a and the base-side engagement portion 82, allowing the base member 78 to move up and down relative to the vertical frame 42a. This allows the interlocking rod 69 to move up and down, so that the multiple louvers 37 can be opened all at once. In this example, when the engagement between the slide member 101a and the base-side engagement portion 82 is released, the base member 78 and the lever mechanism portion 70 move downward due to the elasticity of the tension spring 83, and the interlocking rod 69 moves downward via the action pin 77, so that the multiple louvers 37 are opened all at once. Therefore, according to the fire grille 1 of this example, high-temperature air can be efficiently released to the outside, so that even if a fire occurs with the louvers 37 fully closed, heat dissipation from the sash window 2 can be unobstructed.

[0163] Furthermore, when the drive mechanism 100 constituting the heat-sensing actuator 35 detects that a predetermined temperature has been reached, the fire grille 1 of this example moves only one of the pair of slide members 101a, 101b in the left-right direction. The pair of slide members 101a, 101b are configured to be able to move synchronously in opposite directions relative to the left-right direction, so that when one slide member 101b is moved left-right by the drive mechanism 100, the other slide member 101a can be moved in the opposite left-right direction to the one slide member 101b. This allows the slide members 101a, 101b to be disengaged from the window frame side engagement portion 13, so that the fire grille 1 (grating body 34) can be swung open in the event of a fire.

[0164] In particular, in this example, the timing at which one slide member 101a and the window frame side engagement portion 13 are disengaged can be matched to the timing at which the other slide member 101b and the window frame side engagement portion 13 are disengaged, so that the fire grille 1 can be smoothly swung open while keeping the fire grille 1 and the sash window 2 parallel to each other.

[0165] 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-tilting window, widening 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 escape efficiently to the outside, further improving heat dissipation from the sash window 2. Moreover, in this example, the fire grille 1 can be swung open and slid toward the outdoors almost simultaneously with the opening of the multiple louvers 37, so sufficient heat dissipation from the sash window 2 can be ensured.

[0166] In this embodiment, the grille lower brackets 39a and 39b are provided with a pivot 94 and a support pin 95, and the window frame lower brackets 10a and 10b are provided with an inclined guide portion 23, an engagement receiving portion 24, and a pin receiving portion 25. Therefore, when the fire grille 1 is swung open, not only the upper portion of the sash window 2 and the upper portion of the fire grille 1 are opened, but also the lower portion of the sash window 2 and the lower portion of the fire grille 1 are opened. This improves the heat dissipation from the sash window 2 and prevents the accumulation of flammable gas generated from the sash window 2 due to a fire. In addition, by changing the overall length of the inclined guide portion 23, the width of the opening between the lower frame 41 and the window frame 7 can be freely set. Furthermore, by changing the inclination angle of the inclined guide portion 23, the time required for the fire grille 1 to slide can be adjusted.

[0167] In addition, in this example, multiple exhaust holes 54 are provided in the lower frame blocking piece 51 that constitutes the fire grille 1, so that flammable gases generated from the sash window 2 can also be discharged to the outdoors through the exhaust holes 54.

[0168] In addition, in this example, one heat-sensing operating device 35 can perform two functions: a first function of holding the fire grille 1 in a closed position under normal conditions, and a second function of opening the fire grille 1 by swinging it open in the event of a fire, and a second function of opening multiple louvers 37 together in the event of a fire.This makes it possible to make the fire grille 1 lighter and more compact than when the two functions are performed by separate devices.

[0169] Furthermore, in this example, the operating mechanism 99 is composed of a pair of slide members 101a, 101b and a rotating plate 102. Therefore, while having a simple configuration with a small number of parts, the pair of slide members 101a, 101b can be moved synchronously in opposite directions relative to the left and right direction.

[0170] Furthermore, in this example, the pair of slide members 101a, 101b can be moved in the left-right direction by only one driving mechanism 100, so that the weight and cost of the fire grille 1 can be reduced.

[0171] In addition, in this example, since the melting member 112 functioning as a temperature fuse is in contact with the heat transfer member 111 having high thermal conductivity such as solid aluminum, it is possible to easily detect a temperature rise in the event of a fire by the melting member 112. In other words, it is possible to more quickly and accurately bring the temperature of the melting member 112 close to the temperature in the vicinity of the outdoor side of the sash window 2.

[0172] In addition, in this example, since the operating mechanism 99 is located inside the upper frame body 46, the operating mechanism 99 can be protected and the provision of the operating mechanism 99 can prevent a reduction in the design freedom of the fire grille 1.

[0173] Furthermore, in this example, since the drive mechanism 100 is fixed to the indoor side of the upper frame house inner wall portion 48, it is possible to suppress a decrease in the freedom of design of the fire grille 1 due to the provision of the drive mechanism 100. It is also possible to prevent the drive mechanism 100 from being operated from the outdoor side. In particular, in this example, since the drive mechanism 100 is fixed to the other end of the indoor side of the upper frame house inner wall portion 48 on the left-right direction that faces the outer screen 5, it is possible to reduce the gap between the drive mechanism 100 and the outer screen 5. Therefore, the drive mechanism 100 makes it easier to detect a temperature rise when a fire occurs.

[0174] In this example, the window frame side engagement parts 13 that engage with the pair of slide members 101a, 101b are provided on the window frame upper brackets 9a, 9b that are fixed to the upper ends of the left and right vertical window frames 8a, 8b. Therefore, the fire grille 1 of this example can be installed on the outdoor side of an existing sash window.

[0175] In addition, since the window frame side engagement portion 13 is provided on the portion of the window frame upper brackets 9a, 9b that is inserted inside the left and right vertical frames 42a, 42b when the fire grille 1 is in the closed state, the engagement portion between the window frame side engagement portion 13 and the slide members 101a, 101b can be protected.

[0176] Also, in this example, each of the window frame upper brackets 9a, 9b is composed of an upper bracket body 17 made of aluminum alloy and having a window frame side engaging portion 13, and an upper punch anchor 18 made of stainless steel plate. In other words, the upper punch anchor 18, which is the part fixed to the vertical window frames 8a, 8b, is made of high-strength stainless steel plate, and the upper bracket body 17 having the window frame side engaging portion 13, 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.

[0177] Furthermore, in this example, each of the window frame lower brackets 10a, 10b is composed of a lower bracket body 29 made of an aluminum alloy and having a lower protruding plate portion 21, and a lower punch anchor 30 made of a stainless steel plate. In other words, the lower punch anchor 30, which is the part fixed to the vertical window frames 8a, 8b, is made of a high-strength stainless steel plate, and the lower bracket body 29 having the lower protruding plate portion 21, which requires less strength than the part fixed to the vertical window frames 8a, 8b, is made of an aluminum alloy, which is less expensive than a stainless steel plate. This makes it possible to ensure the strength of the window frame lower brackets 10a, 10b while reducing costs.

[0178] In addition, in this example, a pair of louvers 37 arranged on both the left and right sides of the central mullion 53 are connected to each other by a connecting shaft 63 so that they cannot rotate relative to each other. Therefore, even in a structure that includes a central mullion 53, in the event of a fire, the louvers 37 arranged on both the left and right sides of the central mullion 53 can be opened together.

[0179] In this example, a tension spring 83 is hung between the base member 78 and the lower frame 41, and a downward elastic force is applied to the base member 78, so that when the engagement between the slide member 101a and the base side engagement part 82 is released, the base member 78 can be moved downward relative to the vertical frame 42a more quickly than if it were to fall due to gravity. Therefore, the multiple louvers 37 can be opened quickly.

[0180] In addition, in this example, since the engaging portion between the base side engaging portion 82 and the slide member 101a is disposed inside the vertical frame 42a, the engaging portion can be protected.

[0181] In addition, in this example, the crank shaft 62 and the connecting shaft 63 that make up the louver opening and closing mechanism 38 are each cut and processed from an aluminum alloy blank, which improves fire resistance compared to when they are made from plastic parts, and also enables the fire grille 1 to be made lighter and less expensive.

[0182] In this example, the inward projection 68 is provided on the inner peripheral surface of the insertion hole 67 provided in the louver 37, and the outward projections 74, 76 are provided on the outer peripheral surfaces of the insertion shaft portion 71 constituting the crankshaft 62 and the connecting insertion shaft portion 75 constituting the connecting shaft 63, respectively, so that the insertion shaft portion 71 and the connecting insertion shaft portion 75 can be prevented from slipping out of the insertion hole 67. In particular, in this example, the front side surfaces of the outward projections 74, 76 in the insertion direction of the insertion shaft portion 71 and the connecting insertion shaft portion 75 into the insertion hole 67 are inclined toward the opposite side with respect to the insertion direction of the insertion shaft portion 71 and the connecting insertion shaft portion 75 into the insertion hole 67 as they move from the radially inner side toward the radially outer side. This reduces frictional resistance when the insertion shaft portion 71 and the connecting insertion shaft portion 75 are inserted into the insertion hole 67, and effectively prevents the insertion shaft portion 71 and the connecting insertion shaft portion 75 from slipping out of the insertion hole 67.

[0183] In addition, in this example, one end of the wire 125 constituting the angle regulating means 123 for regulating the opening angle of the fire grille 1 is fixed to a portion of the storage case 124 above the hooking portion 126, and the other end of the wire 125 passes under the hooking portion 126 from the outdoor side to the indoor side and is directly or indirectly fixed to the window frame 3. This improves the workability of storing the wire 125 in the storage portion 127 when the fire grille 1 is in the closed state. That is, in this example, the intermediate portion of the wire 125 is hung on the hooking portion 126 from the bottom, so that the wire 125 is curved inside the storage case 124 so that the bottom side where the storage portion 127 is located is convex. Therefore, the portion of the wire 125 protruding from the storage case 124 to the indoor side is pushed obliquely downward and toward the outdoor side toward the storage portion 127, so that the wire 125 can be efficiently stored in the storage portion 127.

[0184] [Second Example of the Implementation Form] The second embodiment will be described with reference to FIGS.

[0185] In the structure of the first example of the embodiment, when the fire grille 1 is swung open, the space between the top of the sash window 2 and the top of the fire grille 1 is opened, and the space between the bottom of the sash window 2 and the bottom of the fire grille 1 is opened, but in the fire grille 1a of this example, only the space between the top of the sash window 2 and the top of the fire grille 1a is opened.

[0186] For this reason, in this example, the structure of the part that supports the lower part of the fire grille 1a (grating body 34a) so that it can swing freely is changed from the structure of the first example of the embodiment. Specifically, the structure of the window frame lower brackets 10c, 10d is changed from the structure of the first example of the embodiment, and the grille lower bracket is omitted from the fire grille 1a. The structure of the other parts is the same as the structure of the first example of the embodiment.

[0187] Window frame bottom bracket The window frame lower brackets 10c, 10c are symmetrical to each other in the left-right direction. As shown in Fig. 48, each of the window frame lower brackets 10c, 10d is a substantially flat plate-like member, and has a lower protruding plate portion 21a protruding toward the outdoors, a lower mounting portion 22a provided at the indoor end of the lower protruding plate portion 21a, and a pivot 94a.

[0188] The lower protruding plate portion 21a is configured in a substantially rectangular flat plate shape, and is disposed with its plate thickness oriented in the left-right direction.

[0189] The lower mounting portion 22a is a portion that fixes the window frame lower brackets 10c, 10c to the vertical window frames 8a, 8b, and has a lower clamping portion 27a having a substantially U-shaped end face shape. The lower clamping portion 27a has a lower clamping groove 28a that opens outward in the left-right direction and extends in the up-down direction.

[0190] The pivot 94a is provided at the lower end of the outdoor end of the lower overhanging plate 21a with its central axis facing horizontally. The pivot 94a serves as the swing center when the fire grille 1a swings open. The pivot 94a has a cylindrical shape and protrudes horizontally from the inner surface of the lower overhanging plate 21a in the left-right direction. The tip of the pivot 94a is provided with an outward flange-shaped retaining flange 129.

[0191] The window frame lower brackets 10c, 10d are fixed to the window vertical frames 8a, 8b by pressing the vertical frame fin pieces 16 provided on each of the window vertical frames 8a, 8b into the inside of the lower clamping groove 28a and clamping the vertical frame fin pieces 16 from both indoor and outdoor sides by the lower clamping portion 27a.

[0192] The window frame lower brackets 10c and 10d of this example are composed of a plurality of members. Each of the window frame lower brackets 10c and 10d is composed of three parts: a lower bracket body 29a, a lower punch anchor 30a, and a pivot 94a.

[0193] The lower bracket body 29a is configured in a rectangular flat plate shape. The lower punch anchor 30a has a lower clamping portion 27a and a protruding plate portion 130 extending from the lower clamping portion 27a toward the outdoor side. Therefore, the lower protruding plate portion 21a of the window frame lower brackets 10c, 10d is configured by fixing the lower bracket body 29a to the protruding plate portion 130 of the lower punch anchor 30a.

[0194] In this example, instead of omitting the grille lower bracket from the fire grille 1a, an engagement receiving portion 24a is formed at the lower end of each of the vertical frame blocking pieces 56a, 56b that make up the left and right vertical frames 42a, 42b. The engagement receiving portion 24a is formed as a notch that opens downward. The engagement receiving portion 24a has a semi-elliptical shape when viewed from the left and right, and the inner part (upper end) of the engagement receiving portion 24a has a concave arc shape.

[0195] In this example, in order to support the lower end of the fire grille 1a so that it can swing relative to the window frame 3, the engagement receiving portion 24a formed at the lower end of each of the left and right vertical frame blocking pieces 56a, 56b is engaged from above with the pivot 94a provided on the window frame lower bracket 10c, 10c. Specifically, the engagement receiving portion 24a is inserted from above between the lower protruding plate portion 21a and the retaining flange portion 129, and the pivot 94a is engaged with the engagement receiving portion 24a. In this way, the lower end of the fire grille 1a is supported so that it can swing relative to the vertical window frames 8a, 8b (see FIG. 4). The weight of the fire grille 1 is supported by the window frame 3 via the window frame lower brackets 10c, 10d.

[0196] In the case of this example as described above, when a fire breaks out, the heat-sensing actuator 35 is activated, and when the engagement between the slide members 101a, 101b and the window frame side engagement portion 13 is released, the fire grille 1a is swung around the pivot 94a provided on the window frame lower brackets 10c, 10d as the swing center, as shown in Fig. 49(A)→(B). Also in this example, when the heat-sensing actuator 35 is activated, the engagement between the slide member 101a and the base side engagement portion 82 is released, and the multiple louvers 37 are opened together, as shown in Fig. 43(A)→(B). Therefore, according to the fire grille 1a of this example, even if a fire breaks out with the louvers 37 fully closed, it is possible to prevent heat dissipation from the sash window 2 from being blocked. The other configurations and effects are the same as those of the first embodiment.

[0197] Although the embodiment of the present invention has been described above, the present invention is not limited to this, and can be modified as appropriate without departing from the technical concept of the invention.

[0198] The present invention is not limited to the examples of the embodiments. For example, the engagement between the window frame side engagement part and the slide member, and the engagement between the base side engagement part and the slide member are not limited to the structures of the examples of the embodiments, and may be changed to other engagement forms known in the art as long as they can perform their functions.

[0199] In the embodiment, a case where a wire is used as the angle restriction means for restricting the opening angle of the fire grille is described, but the structure of the angle restriction means is not particularly limited, and for example, a link mechanism used in sliding windows can be used, or a hinge that can restrict the opening angle can be used. Also, a biasing means for biasing the fire grille toward the outdoors can be used as the angle restriction means. [Explanation of symbols]

[0200] 1, 1a Fire side grating 2. Sash windows 3. Window Frame 4. Inner Shoji Screen 5. Outside Shoji Screen 6 Window Frame 7 Window sill 8a, 8b Window vertical frame 9a, 9b Window frame upper bracket 10a~10d Window frame bottom bracket 11 Upper extension plate 12 Upper mounting part 13 Window frame side engagement part 14 Upper clamping part 15 Upper clamping groove 16 Vertical frame fin piece 17 Upper bracket body 17x Upper bracket blank 18 Upper punch anchor 19 Upper mounting board 20 Screws 21, 21a Lower protruding plate part 22, 22a Lower mounting part 23 Incline guide section 24, 24a Engagement receiving part 25 Pin receiving part 26 Hook part 27, 27a Lower clamping part 28, 28a Lower clamping groove 29, 29a Lower bracket body 29x Bottom Bracket Blank 30, 30a Lower punch anchor 31 Lower mounting board 32a, 32b Shoji frame 33a, 33b Glass panels 34 Lattice body 35 Heat-sensing actuator 36 Frame body 37 Louver 38 Louver opening and closing mechanism 39a, 39b Grille lower bracket 40 Upper stile 41 Lower stile 42a, 42b stiles 43 Outdoor side frame 44 Indoor frame 45 Screen door 46 Upper frame body 47 Upper stile blockage piece 48 Upper frame inner wall 49 Upper frame insertion part 50 Lower frame body 51 Lower stile blockage piece 53 Neutral mullion 54 Exhaust Vent 55a, 55b Vertical frame body 56a, 56b vertical stile blocker 57 Vertical frame inner wall 58 Vertical frame first insertion part 59 Inner wall of vertical frame 60 Vertical frame second insertion part 61 Vertical frame third insertion part 62 Crankshaft 62x Crankshaft blank 63 Connecting shaft 63x connecting shaft blank 64 Support pin 65 Louver body 66 Support cylinder part 67 Insertion hole 68 Introvert process 69 Interlocking rod 70 Lever mechanism 71 Insertion shaft 72 Support shaft part 73 Connecting part 74 External process 75 Connecting insertion shaft 76 External process 77 Action pin 78 Base material 79 Lever 80 Bases 81 Lever support part 82 Base side engagement part 83 Tension Spring 84 Mounting part 85 Angle adjustment section 86 Intermediate protrusion 87 Screw 88 Fulcrum pin 89 Knob 90 pin insertion hole 91 Pin engagement hole 92 Locking pin 93 Bracket frame 94, 94a Axis 95 Support pin 96a, 96b Side plate part 97 Connecting plate part 98 Screw 99 Operating Mechanism 100 Drive mechanism 101a, 101b Slide members 102 Turntable 103 Engagement claw 104 Support pin 105 Pedestal 106a, 106b Pivot pin 107 Casing 108 Movable plate 109 Fixed plate 110 Elastic member 111 Heat transfer components 112 Melting parts 113 Drive pin 114 Casing body 115 Mounting flange 116 Guide groove 117 Guide hole 118 Screw 119 Movable side convex part 120 Movable side engagement part 121 Fixed side protrusion 122 Engagement hole 123 Angle control means 124 Storage Case 125 Wire 126 Latch part 127 Storage section 128 Screw 129 Anti-slip flange 130 Overhang plate section 131 Insect Net 132 Round hole 133 Round hole 134 Screw 135 Nut

Claims

1. The grille body and the heat-sensing actuator are provided. The surface grating body is A frame body formed in a rectangular frame shape; A plurality of louvers are arranged in parallel in the vertical direction inside the frame body, and each louver is supported so as to be rotatable around a central axis arranged horizontally with respect to the vertical frame constituting the frame body; An interlocking rod is disposed inside the vertical frame and moves vertically relative to the vertical frame to open and close the plurality of louvers; A base member that supports the interlocking rod so as to be movable relative to the interlocking rod in the vertical direction, has a base side engagement portion, and is disposed inside the vertical frame; The heat-sensing actuator engages with the base-side engaging portion to support the base member in a normal position, and when a predetermined temperature is reached, disengages from the base-side engaging portion to allow the base member to move vertically relative to the vertical frame, thereby opening the plurality of louvers. Fire safety grid.

2. a biasing member that applies a downward force to the base member; When the predetermined temperature is reached, the base member is moved downward relative to the vertical frame.

2. A fire grate according to claim 1.

3. The heat sensing actuator includes an actuating mechanism that constitutes a link mechanism, and a drive mechanism that actuates the actuating mechanism, The actuation mechanism has a slide member that is engageable with and disengageable from the base side engagement portion and is movable in the left-right direction.

2. A fire grate according to claim 1.

4. The base-side engagement portion is provided on an upper end portion of the base member, The operating mechanism is disposed inside an upper frame constituting the frame body, and the left and right ends of the slide member are inserted into the vertical frame. A fire grate according to claim 3.

5. 2. The fire grille of claim 1, further comprising a plurality of crank shafts, each of which has a crank shape, one end of which is arranged coaxially with the central axis of the louver and fixed to the louver so as not to rotate relative thereto, and the other end of which is supported rotatably relative to the interlocking rod.

6. 6. The fire grille of claim 5, wherein the crankshaft is cut from a crank plate.

7. The louver includes a louver body having a corrugated plate shape, and a support tube portion having an insertion hole and integrally provided with the louver body, the crankshaft is entirely made of an aluminum alloy and has an insertion shaft portion to be inserted into the insertion hole, The insertion hole is a rectangular hole, The insertion shaft portion has a cross-sectional shape that matches the insertion hole. A fire grate as claimed in claim 5.

8. 8. The fire grille according to claim 7, wherein the outer circumferential surface of the insertion shaft is provided with one or more outward projections.

9. 9. The fire grille according to claim 8, wherein the outward projection extends in a direction perpendicular to an insertion direction of the insertion shaft portion.

10. 8. The fire grille according to claim 7, wherein an inner peripheral surface of the insertion hole is provided with one or more inward projections.

11. 11. The fire grille according to claim 10, wherein the inward projection extends in a direction parallel to a central axis of the insertion hole.

12. The outer circumferential surface of the insertion shaft is provided with one or more outward protrusions, One or more inward protrusions are provided on an inner circumferential surface of the insertion hole that faces the outward protrusion, The outward protrusion and the inward protrusion are perpendicular to each other. A fire grate according to claim 7.

13. The frame body further includes a middle mullion, Among the plurality of louvers, a pair of louvers arranged on both the left and right sides of the central mullion are connected to each other so as not to rotate relative to each other via a connecting shaft supported rotatably on the central mullion.

2. A fire grate according to claim 1.

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