Fireproof surface grid

Abstract

To achieve a structure of a fireproof planar lattice which can prevent heat radiation from a window device from being shielded, even in the case where a fire occurs indoors, in a state of a louver being totally closed.SOLUTION: A fireproof planar lattice 1 includes a planar lattice body 14, a window frame side bracket 15, and a lock device 16. The planar lattice body 14 is openably / closably mounted on the outdoor side of a window vertical frame constituting a window device 2 by utilizing the window frame side bracket 15. In a normal situation, by the lock device 16 mounted between the window vertical frame and the planar lattice body 14, the planar lattice body 14 is locked to a closed position, and when a fire occurs, a release mechanism included in the lock device 16 is actuated and lock is released. Thereby, the planar lattice body 14 is oscillated and opened.SELECTED DRAWING: Figure 9

Description

[Technical field]

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

[0002] Conventionally, in collective housing such as condominiums, window devices are installed in positions facing common corridors for the purpose of indoor ventilation and lighting. In addition, grilles are installed on the outdoor side of window devices installed facing common corridors to ensure crime prevention and privacy. Various structures of grilles have been known, but the use of louver grilles with openable louvers, as described in JP 2009-46868 A and the like, has been increasing in recent years because they allow for free adjustment of ventilation and light blocking properties. Meanwhile, grilles with improved fire resistance have been demanded in recent years to prevent the spread of fire in the event of a fire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-46868 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to improve fire prevention performance while ensuring crime prevention and privacy, it is effective to design a structure in which the louver grille installed on the outdoor side of the window device does not block heat dissipation from the window device when a fire breaks out indoors with the louvers fully closed.

[0005] To solve the above-mentioned problems, the present invention aims to provide a fireproof grille that does not block heat dissipation from a window device even when a fire breaks out indoors with the louvers fully closed. [Means for solving the problem]

[0006] The present invention The first to fourth aspects Fire prevention grilles both It is installed on the outdoor side of the window device and comprises a window frame bracket, a grille body, and a locking device. The window-frame bracket is attached to the lower part of a vertical window frame of a window device. The grille body is configured in a rectangular frame shape and has a frame body whose lower part is supported (pivoted) so that it can swing relative to the window frame side bracket, and a number of louvers supported on the inside of the frame body so that they can be opened and closed. The locking device has a window frame side locking member attached to the upper part of the vertical window frame, and a grille side locking member attached to the upper part of the vertical frame of the frame body, and locks (holds) the grille body in the closed position. The locking device includes a release mechanism that detects when a predetermined temperature is reached and releases the lock. The present invention The first to fourth aspects Fire prevention grilles both When the release mechanism is activated, the grille body is swung open. The fire grates of the first to fourth aspects of the present invention can be implemented in combination.

[0007] In one embodiment of the fireproof grille of the present invention, the window frame side bracket can be attached to the lower part of each of the left and right vertical window frames, the window frame side locking member can be attached to the upper part of each of the left and right vertical window frames, and the grille side locking member can be attached to the upper part of each of the left and right vertical frames.

[0008] The present invention The first aspect fire safety grid teeth , the window frame side locking member teeth , the window frame side engagement portion Yes , the grille side locking member teeth A window frame side engaging portion and a lattice side engaging portion that can be engaged in the indoor / outdoor direction are provided. With, before Recording grid side engagement Department a movable member that is moved by the release mechanism; do.In addition, engagement in the indoor / outdoor direction refers to engagement in a manner that restricts relative displacement in the indoor / outdoor direction between the window frame side locking member and the grille side locking member.

[0009] The present invention The first aspect fire safety grid teeth The locking member on the grille side is provided with the release mechanism, and the release mechanism moves the engagement portion on the grille side. To make.

[0010] The present invention The first aspect fire safety grid teeth , the window frame side engagement portion teeth , engagement hole Yes , the surface grating side engagement portion teeth The engaging pin is insertable into and removable from the engaging hole. do. The engagement hole includes not only a hole whose periphery is closed, but also a notched hole whose circumferential direction is partially open, and a bottomed hole having a bottom.

[0011] In the fire grille according to one aspect of the present invention, the engagement holes and the engagement pins can be arranged with their respective central axes pointing in the vertical direction. When the engagement hole is a hole with a closed periphery, the release mechanism can move the engagement pin in the upward or downward direction, which is the direction of the central axis of the engagement pin. When the engagement hole is a notched hole with a part open in the circumferential direction, the engagement pin can be moved in the opening direction of the engagement hole and in a direction perpendicular to the central axis of the engagement pin, for example, in an in-plane direction.

[0012] In the fire grille according to one aspect of the present invention, the engagement holes and the engagement pins can be arranged with their respective central axes facing the indoor / outdoor direction. In this case, the engagement pin may have an engagement flange at the end on the indoor side, and the engagement hole may be a notched hole with a portion open in the circumferential direction. The release mechanism may move the engagement pin in the opening direction of the engagement hole and in a direction perpendicular to the central axis of the engagement pin, for example, upward, downward, or in-plane.

[0013] In one embodiment of the fireproof grille of the present invention, the release mechanism can be configured to include an elastic member that applies force to the grille side engagement portion, which is a movable member, in a direction to release the engagement with the window frame side engagement portion in the indoor / outdoor direction. In this case, the release mechanism further includes a melting member, such as a temperature fuse, which melts or blows off when the specified temperature is reached, and the force applied by the elastic member to the grille side engagement portion by the melting member can prevent the grille side engagement portion from moving in a direction that releases the engagement with the window frame side engagement portion in the indoor / outdoor direction.

[0014] The present invention The second aspect fire safety grid teeth , the surface grating body teeth The frame further includes a lattice side bracket fixed to the lower part of the frame body. picture, Either the window frame side bracket or the grille side bracket teeth The central axis is arranged horizontally (including cases where it is shifted by a few degrees from the horizontal), and has a pivot axis that serves as the swing center of the surface grid body. do. before Axis teeth , it can be arranged outdoors relative to the locking device.

[0015] In a fire grille according to one aspect of the present invention, the window frame bracket can be provided with a protruding plate portion consisting of a lower plate portion and a vertical plate portion and having a generally L-shape. The lower plate portion can have an outdoor opening engagement recess provided at the bottom of the outdoor end, an indoor opening engagement recess provided at the top of the outdoor end, an inclined guide portion provided at the upper edge which slopes downward as it approaches the outdoor side and whose outdoor end is connected to the indoor opening engagement recess, and an upper opening retaining recess provided at the indoor end of the inclined guide portion. The grille side bracket is Outdoor side and an outdoor pivot engageable with the outdoor opening engagement recess; Indoor end and may have an indoor side pivot shaft engageable with each of the indoor side opening engagement recess and the upper side opening holding recess. When the grille body is in a closed state, the outdoor pivot shaft engages with the outdoor opening engagement recess, and the indoor pivot shaft engages with the upper opening retention recess. When the release mechanism is activated, the outdoor pivot shaft becomes the swing center of the grille body, and the grille body starts to swing. Then, as the swinging motion of the grille body progresses (the opening angle becomes larger), the weight of the grille body causes the outdoor side pivot to slip out of the outdoor side opening engagement recess to the outdoor side, and at the same time, the indoor side pivot to slip out upward from the upper opening retaining recess and engage with the inclined guide portion. Then, the indoor side pivot shaft is slid toward the outdoor side along the inclined guide portion until the indoor side pivot shaft engages with the indoor side opening engagement recess, thereby sliding the grille body toward the outdoor side. Depending on the attitude of the grille body at the time when the indoor side pivot shaft engages with the indoor side opening engagement recess, the grille body may further swing around the indoor side pivot shaft as the swing center.

[0016] The present invention The third aspect fire safety grid teeth , the frame body teeth The structure is composed of an outdoor side frame body having an upper frame, a lower frame, and the left and right vertical frames, and an indoor side frame body on the inside of which the louvers are arranged. will be done. beforeThe above frame teeth an upper frame body constituting the upper edge of the outdoor side frame body; and an upper frame closing piece constituting the upper edge of the indoor side frame body, which closes the gap between the upper frame body and the window upper frame constituting the window frame when the grille body is in a closed state. Yes , said lower stile teeth a lower frame body constituting the lower side of the outdoor side frame body, and a lower frame closing piece constituting the lower side of the indoor side frame body, which closes the gap between the lower frame body and the window lower frame constituting the window frame when the grille body is in a closed state. Yes , each of the left and right vertical frames teeth The grille body includes a vertical frame body that constitutes the left and right vertical sides of the outdoor side frame body, and a vertical frame closing piece that constitutes the left and right vertical sides of the indoor side frame body and closes the gap between the vertical frame body and the vertical window frame when the grille body is closed. do. before Recording grid body teeth and further comprising a screen door for closing the opening of the outdoor side frame body. do. before Recording grid body teeth It can be swung around a pivot axis arranged at a position overlapping with the lower frame body in the in-plane direction.

[0017] The fourth aspect of the present invention is a fireproof grille. , the surface grating body teeth The outdoor side frame has an upper frame, a lower frame, and the left and right vertical frames, and the louvers are arranged on the inside, and the outdoor side frame has left and right indoor side panels. will be done. before The above frame teeth The outdoor side frame is made up of only an upper frame body. Be , said lower stile teeth The outdoor side frame is made up of only a lower frame body. Be , each of the left and right vertical frames teeth The vertical frame body constitutes the left and right vertical sides of the outdoor side frame body, and the vertical frame auxiliary piece constitutes the indoor side panel, the upper end of which is swingably connected to the upper end of the vertical frame body and the lower end of which is swingably connected and supported to the window frame side bracket. do. before Recording grid body teethThe outdoor side frame body is provided with a screen door for closing the opening. stomach.

[0018] The fire grille according to one aspect of the present invention may further comprise angle restriction means for restricting the opening angle of the grille body.

[0019] The fire grille according to one aspect of the present invention may further include a biasing member that biases the grille body toward the outdoors. The biasing member may be, for example, a spring or rubber. Effect of the Invention

[0020] According to the fire grille of the present invention, even if a fire breaks out indoors with the louvers fully closed, heat dissipation from the window device is not blocked. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a view 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 corresponding to the cross-section taken along line AA in FIG. 1, with the locking device omitted. [Diagram 3] FIG. 3 is a cross-sectional view corresponding to the cross section taken along line BB in FIG. [Figure 4] Figure 4 shows the grille side bracket removed from the fire grille in the first example of the embodiment, where (A) is a front view seen from the outdoor side, (B) is a plan view seen from above, (C) is a bottom view seen from below, (D) is a right side view, (E) is a left side view, and (F) is a rear view seen from the indoor side. [Diagram 5] FIG. 5 is a cross-sectional view of the lower part of the vertical window frame showing the mounting state of the window-frame bracket with the grille body omitted. [Figure 6]Figure 6 shows the window frame side bracket removed, where (A) is a front view seen from the outdoor side, (B) is a plan view seen from above, (C) is a bottom view seen from below, (D) is a right side view, (E) is a left side view, and (F) is a back view seen from the indoor side. [Figure 7] FIG. 7 is a cross-sectional view corresponding to the cross section taken along line CC in FIG. [Figure 8] FIG. 8 is a cross-sectional view of the upper part of the vertical window frame, showing the attached state of the window-frame-side locking member with the grille body omitted. [Figure 9] FIG. 9 is a vertical cross-sectional view showing a window device and a fire grille with the screens omitted, where (A) shows the grille body in a closed state, and (B) shows the grille body in a swing-open state. [Figure 10] Figure 10 shows the window frame side locking member, where (A) is a front view seen from the outdoor side, (B) is a plan view seen from above, (C) is a bottom view seen from below, (D) is a right side view, (E) is a left side view, and (F) is a back view seen from the indoor side. [Figure 11] Figure 11 shows the grille side locking member, where (A) is a front view seen from the indoor side, (B) is a plan view seen from above, (C) is a bottom view seen from below, (D) is a right side view, (E) is a left side view, and (F) is a back view seen from the outdoor side. [Figure 12] Figure 12 is a diagram corresponding to (D) in Figure 11, showing the grille-side locking member, where (A) shows the state before the release mechanism is activated, and (B) shows the state after the release mechanism is activated. [Figure 13] FIG. 13 is a cross-sectional view corresponding to FIG. 7, showing a second example of the embodiment. [Figure 14] FIG. 14 is a cross-sectional view corresponding to FIG. 8, showing a second example of the embodiment. [Figure 15] FIG. 15 is a vertical cross-sectional view corresponding to FIG. 9, showing a second example of the embodiment. [Figure 16] FIG. 16 is a view corresponding to FIG. 10, showing a window-frame-side locking member according to a second example of the embodiment. [Figure 17] FIG. 17 is a view corresponding to FIG. 11, showing an extracted grille-side locking member according to the second example of the embodiment. [Figure 18] Figure 18 is a diagram corresponding to (F) in Figure 17, showing the grille-side locking member, where (A) shows the state before the release mechanism is activated, and (B) shows the state after the release mechanism is activated. [Figure 19] FIG. 19 is a view corresponding to FIG. 6, showing a window-frame-side bracket according to a third example of the embodiment. [Figure 20] FIG. 20 is a view corresponding to FIG. 4, showing a bracket on a surface grille side according to a third example of the embodiment. [Figure 21] FIG. 21 is a vertical cross-sectional view corresponding to FIG. 9, showing a third example of the embodiment. [Figure 22] FIG. 22 is a cross-sectional view showing the sliding operation of the surface grid body in a stepwise manner in time series in relation to the third example of the embodiment. [Figure 23] FIG. 23 is a vertical cross-sectional view corresponding to FIG. 9(A), showing a fourth example of the embodiment. [Figure 24] FIG. 24 is a vertical cross-sectional view showing an example of a window device to which a fire grille according to a fourth embodiment is attached. [Diagram 25] FIG. 25 is a cross-sectional view corresponding to FIG. 7, showing a fourth example of the embodiment. [Figure 26] FIG. 26 is a cross-sectional view corresponding to FIG. 3, showing a fourth example of the embodiment. [Figure 27] FIG. 27 is a vertical cross-sectional view showing a state in which the grille body has been swung open during maintenance work from the state shown in FIG. [Figure 28] FIG. 28 is a vertical cross-sectional view corresponding to FIG. 9(B) showing a fourth example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] [First Example of Implementation] A first example of the embodiment will be described with reference to FIGS. 1 to 12. FIG.

[0023] The fire grille 1 is installed on the outdoor side of a window device 2 that is installed facing a common corridor in an apartment building, for example, and has the function of automatically swinging open in the event of a fire, so as not to impede the release of heat from the window device 2. Below, the structure of the window device 2 will be briefly explained, and then the structure of the fire grille 1 will be explained in detail.

[0024] [Window device] The window device 2 comprises a rectangular window frame 3, and an inner screen 4 and an outer screen 5 which are fitted inside the window frame 3 in a sliding manner so as to be movable in the in-plane direction (horizontal direction). The outer side in the in-plane direction refers to the outer side in the width direction of the window frame 3 (left and right direction in Figure 1), and the inner side in the in-plane direction refers to the center side of the window frame 3 in the width direction.

[0025] The window frame 3 comprises an upper window frame 6 arranged in the in-plane direction of the opening of the building frame and constituting the upper side, a lower window frame 7 arranged in the in-plane direction and constituting the lower side, and a pair of vertical window frames 8a, 8b arranged vertically and constituting the left and right vertical sides. The in-plane ends of the upper window frame 6 and the lower window frame 7 are connected to the top and bottom ends of the vertical window frames 8a, 8b using tapping screws or the like, thereby forming the window frame 3 into a rectangular frame (a square frame with right-angled corners). The upper window frame 6, the lower window frame 7, and the vertical window frames 8a, 8b are each made of an aluminum alloy.

[0026] The inner screen 4 and the outer screen 5 are composed of rectangular screen frames 9a, 9b and rectangular glass panels 10a, 10b fitted inside the screen frames 9a, 9b. Each of the frames (upper frame, lower frame, door end frame, and door frame) that make up the screen frames 9a, 9b is made of aluminum alloy.

[0027] The inner screen 4 is set into the indoor side of the window frame 3 so that it can move in the in-plane direction. For this purpose, the upper edge of the screen frame 9a of the inner screen 4 is engaged with an upper guide rail 11a provided on the indoor side of the window top frame 6, and a roller 12a provided on the lower edge of the screen frame 9a of the inner screen 4 is engaged with a lower guide rail 13a provided on the indoor side of the window bottom frame 7.

[0028] The outer screen 5 is set into the outdoor portion of the window frame 3 so that it can move in the in-plane direction. For this purpose, the upper edge of the screen frame 9b of the outer screen 5 is engaged with the upper guide rail 11b provided on the outdoor portion of the window top frame 6, and the roller 12b provided on the lower edge of the screen frame 9b of the outer screen 5 is engaged with the lower guide rail 13b provided on the outdoor portion of the window bottom frame 7.

[0029] The window device 2 of this example differs from the structure of a fourth example of the embodiment described later in that it does not include a screen door, but instead includes a screen door 19 in the fire grille 1, as described later.

[0030] In this example, a sliding window device 2 is used as the window device, however, when implementing the present invention, the structure of the window device is not limited to the sliding type, and other structures such as a fixed window, an inward-opening window, or an inward-tilting window can also be used.

[0031] [Overall structure of fireproof grille] The fireproof grille 1 is installed on the outdoor side of a window device 2 to ensure crime prevention and privacy, and is broadly composed of a grille body 14, a pair of window frame side brackets 15, and a pair of locking devices 16.

[0032] The grille body 14 is supported on the outdoor side of the vertical window frames 8a, 8b that make up the window frame 3 of the window device 2 by using window frame side brackets 15 so as to be able to be opened and closed, and is normally locked in the closed position (a position that is arranged parallel to the window device 2 and completely covers the window device 2 from the outdoor side) by a locking device 16, but in the event of a fire, the locking device 16 is released and the grille is swung open. Each of the components that make up the fire grille 1 of this example will be described in detail below.

[0033] <Lattice body> The grille body 14 comprises a rectangular frame body 17, a plurality of louvers 18 supported inside the frame body 17 so as to be able to open and close, a screen door 19, and a pair of grille side brackets 20.

[0034] "Frame body" The frame body 17 has an upper frame 21, a lower frame 22, and left and right vertical frames 23a, 23b, and is composed of a rectangular outdoor frame body 24 arranged on the outdoor side, and a rectangular indoor frame body 25 arranged on the indoor side.

[0035] Louvers 18 are arranged inside the outdoor frame body 24. A screen door 19 is attached to the indoor side of the louvers 18 so as to cover the opening of the outdoor frame body 24. Therefore, the indoor frame body 25 covers all four sides of the space between the screen door 19 and the inner and outer screens 4 and 5, improving visibility from the outdoor side and insect resistance.

[0036] As shown in FIG. 2, the upper frame 21 has an upper frame main body 26 and an upper frame closing piece 27, each of which is made of an aluminum alloy.

[0037] The upper frame body 26 has a substantially rectangular cross-sectional shape and a tapping hole, and constitutes the upper side of the outdoor side frame body 24. Both ends in the in-plane direction of the upper frame body 26 are connected to the upper ends of the left and right vertical frame bodies 34a, 34b (described later) by tapping screws (not shown) or the like.

[0038] The upper frame closing piece 27 is configured in a substantially flat plate shape, is disposed on the indoor side of the upper frame body 26, and constitutes the upper edge of the indoor frame body 25. The upper frame closing piece 27 closes the gap between the upper frame body 26 and the window upper frame 6 when the grille body 14 is in the closed state. A sealing member (mohair in the illustrated example) 28a is attached to the indoor end of the upper frame closing piece 27 over the entire length in the in-plane direction. When the grille body 14 is in the closed state, the sealing member 28a is pressed against the outdoor side of the window upper frame 6. Both ends in the in-plane direction of the upper frame closing piece 27 are connected by multiple (two in the illustrated example) tapping screws 29a to tapping holes provided in the upper ends of the main bodies of the left and right vertical frame closing pieces 35a, 35b described later. In this example, the upper frame body 26 (upper plate portion of the upper frame body 26) and the upper frame blocking piece 27 are integrally formed, but they may also be formed separately.

[0039] The lower frame 22 has a lower frame main body 30 and a lower frame closing piece 31, each of which is made of an aluminum alloy.

[0040] The lower frame body 30 has a substantially rectangular cross-sectional shape and a tapping hole, and constitutes the lower side of the outdoor side frame body 24. Both ends in the in-plane direction of the lower frame body 30 are connected to the lower ends of left and right vertical frame bodies 34a, 34b (described later) by tapping screws (not shown) or the like.

[0041] The bottom frame closing piece 31 is configured in a substantially flat plate shape, is disposed on the indoor side of the bottom frame body 30, and constitutes the lower side of the indoor frame body 25. The bottom frame closing piece 31 closes the gap between the bottom frame body 30 and the window bottom frame 7 when the lattice body 14 is in a closed state. The indoor end of the bottom frame closing piece 31 is provided with a bottom frame locking portion 32 having a substantially L-shaped cross section. The bottom frame locking portion 32 is locked from above to a fin-shaped bottom frame locking piece 33 provided on the outdoor end of the window bottom frame 7. The ends on both sides of the bottom frame closing piece 31 in the in-plane direction are connected to tapping holes provided on the lower ends of the main body parts of the left and right vertical frame closing pieces 35a and 35b described later by multiple (two in the illustrated example) tapping screws 29b. In this example, the lower frame body 30 (the lower plate portion of the lower frame body 30) and the lower frame blocking piece 31 are integrally formed, but they may also be formed separately.

[0042] As shown in FIG. 3, the vertical frames 23a, 23b each have a vertical frame main body 34a, 34b and a vertical frame closing piece 35a, 35b, each of which is made of an aluminum alloy.

[0043] The vertical frame bodies 34a, 34b have a generally rectangular cross-sectional shape and form the left and right vertical sides of the outdoor side frame body 24. The upper ends of the vertical frame bodies 34a, 34b are connected to both ends of the upper frame body 26 in the in-plane direction, and the lower ends of the vertical frame bodies 34a, 34b are connected to both ends of the lower frame body 30 in the in-plane direction.

[0044] The vertical frame closing pieces 35a, 35b have a hollow main body and an outdoor side panel, are configured to have a substantially L-shaped cross section, and are fixed to the indoor side of the vertical frame body 34a, 34b by fixing screws (not shown). The vertical frame closing pieces 35a, 35b form the left and right vertical sides of the indoor side frame body 25. When the lattice body 14 is in a closed state, the vertical frame closing pieces 35a, 35b close the gap between the vertical frame body 34a, 34b and the vertical window frames 8a, 8b. Sealing members (elastic members in the illustrated example) 28b, 28c are attached to the indoor end of the vertical frame closing pieces 35a, 35b over the entire length in the vertical direction. When the lattice body 14 is in a closed state, the sealing members 28b, 28c are pressed against the outdoor side of the vertical window frames 8a, 8b. The upper ends of the vertical frame blocking pieces 35a, 35b are connected to both ends in the in-plane direction of the upper frame blocking piece 27, and the lower ends of the vertical frame blocking pieces 35a, 35b are connected to both ends in the in-plane direction of the lower frame blocking piece 31. In this example, the vertical frame main bodies 34a, 34b and the vertical frame blocking pieces 35a, 35b are constructed separately, but they may be constructed as one piece.

[0045] "Luva" As shown in FIG. 2, the louvers 18 are strip-shaped members having a substantially U-shaped cross section, and are arranged vertically with their longitudinal direction facing the in-plane direction. The multiple louvers 18 arranged vertically are parallel to each other. Both ends of the louvers 18 in the in-plane direction are rotatably supported (pivoted) to a pair of vertical frame bodies 34a, 34b using support pins 37a, 37b, respectively. In addition, in order to synchronously open and close the multiple louvers 18, the support pins 37a supporting the ends of the louvers 18 on one side in the in-plane direction are connected to each other by a crank arm 38 (see FIG. 3) and an interlocking rod. This allows the multiple louvers 18 to be synchronously opened and closed by operating an operating lever (not shown) provided on the louvers 18 arranged in the vertical middle. The blade angle of the louvers 18 can be adjusted, for example, between 0 degrees, which is a fully closed state, and 90 degrees, which is a fully open state.

[0046] Screen door As shown in FIG. 2 and FIG. 3, the screen door 19 is attached to the outdoor side frame 24. Inside the room and closes the opening of the outdoor side frame body 24. In the structure of this example, maintenance work such as cleaning and replacement of the screen door 19 can be performed from the indoor side.

[0047] {Lattice grille side bracket} The pair of grille side brackets 20 are intended to support the lower end of the grille main body 14 so that it can swing relative to the pair of window frame side brackets 15, and are fixed to the lower end parts of both outer surfaces in the in-plane direction of the frame body 17.

[0048] As shown in Figure 4, the grille side bracket 20 is a plate-shaped member and has a crank-shaped base portion 39 and a bifurcated bearing portion 40 extending downward from the outdoor end of the base portion 39.

[0049] The base plate portion 39 is bent in a crank shape so that the outdoor half is parallel to the indoor half and positioned outward in the in-plane direction. The indoor half of the base plate portion 39 is provided with a plurality of through holes 41 (two in the illustrated example). The bearing portion 40 has an engagement recess 42 that opens downward. The engagement recess 42 has a semi-elliptical shape with a recessed arc-shaped inner portion (upper end portion).

[0050] The grille side bracket 20 is fixed to the vertical frame closing pieces 35a, 35b by screwing screws 43 inserted through through holes 41 provided in the indoor side half of the base plate part 39 into the lower ends of the outer surfaces in the in-plane direction of the left and right vertical frame closing pieces 35a, 35b that constitute the indoor side frame body 25. With the grille side bracket 20 fixed to the vertical frame closing pieces 35a, 35b, the outdoor side end of the bearing part 40 is positioned so as to overlap with the lower frame main body 30 in the in-plane direction. Also, a gap is provided between the bearing part 40 and the outer end of the lower frame main body 30 (outdoor side frame body 24) in the in-plane direction.

[0051] When implementing the present invention, the window-frame bracket can be omitted and the bearings can be provided directly on the frame of the window frame body. Also, the window-frame bracket attached to the lower part of the vertical window frame can be provided with bearings, and the pivot can be provided on the window frame body.

[0052] <Window frame side bracket> The window frame side bracket 15 works in cooperation with the grille side bracket 20 to support the lower end of the grille body 14 so that it can swing open relative to the window frame 3 in the event of a fire, like a so-called outward-tilting window.

[0053] As shown in Fig. 6, the window frame bracket 15 is a plate-like member having a substantially flat shape, and is attached to the lower end of each of the vertical window frames 8a, 8b. The window frame bracket 15 is configured as a piece having a smaller vertical dimension than the vertical window frames 8a, 8b. The window frame bracket 15 is slightly larger in the indoor / outdoor direction dimension than the indoor side frame body 25 that constitutes the grille main body 14. The pair of window frame brackets 15 each have a symmetrical shape, and are arranged parallel to each other with a space therebetween in the in-plane direction. The vertical mounting positions of the pair of window frame brackets 15 relative to the vertical window frames 8a, 8b are consistent with each other.

[0054] The window frame side bracket 15 has a rectangular, flat extension plate portion 44 extending in the indoor / outdoor direction, an attachment portion 45 provided at the indoor end of the extension plate portion 44, an extension plate portion 46 extending downward from the outdoor end of the extension plate portion 44, and a pivot axis 47.

[0055] The mounting portion 45 has a generally U-shaped cross section and is provided with a locking groove 48 that is open on the outside in the in-plane direction.

[0056] The pivot 47 serves as the center of swing when the grille body 14 swings open. The pivot 47 has a cylindrical shape and protrudes horizontally from the inner surface of the extension plate portion 46 in the in-plane direction. Therefore, the central axis of the pivot 47 is disposed horizontally. The tip of the pivot 47 is provided with an outward flange-shaped anti-slip flange portion 49. As shown in Figure 9 (A) , when the grille body 14 is in the closed state, the pivot 47 is disposed on the outdoor side of the locking device 16.

[0057] As shown in Figure 5, the window frame side bracket 15 is attached to the outdoor portion of the lower end of each of the vertical window frames 8a, 8b by pressing the fin-shaped vertical frame locking pieces 50 provided at the outdoor ends of the vertical window frames 8a, 8b into the inside of the locking grooves 48 and clamping the vertical frame locking pieces 50 from both the indoor and outdoor sides with the mounting parts 45.

[0058] In this example, in order to support the lower end of the grille body 14 so that it can swing relative to the window frame 3, the bearing portion 40 of the grille side bracket 20 fixed to the lower end of the grille body 14 is engaged from above with the pivot 47 of the window frame side bracket 15 attached to the lower end of the vertical window frames 8a, 8b. Specifically, the bearing portion 40 is inserted from above between the extension plate portion 46 and the retaining flange portion 49, and the pivot 47 is engaged with the engagement recess 42 provided in the bearing portion 40. In this way, the lower end of the grille body 14 is supported so that it can swing relative to the vertical window frames 8a, 8b. The weight of the fire grille 1 is supported by the window frame 3 via the window frame side bracket 15. When the grille body 14 swings, the lower frame engaging portion 32 provided at the indoor end of the lower frame blocking piece 31 moves upward with the pivot 47 as the swing center, so that the engagement of the lower frame engaging portion 32 with the lower frame engaging piece 33 is released.

[0059] Locking device The locking device 16 has the function of locking the grille body 14 in a closed position under normal circumstances to prevent the grille body 14 from swinging open, and automatically releasing the lock in the event of a fire.

[0060] As shown in FIG. 7, one locking device 16 is provided between the upper portions of the left and right vertical window frames 8a, 8b and the left and right vertical frames 23a, 23b that constitute the grille body 14.

[0061] The locking device 16 is composed of two parts: a window-frame-side locking member 51 and a grille-side locking member 52.

[0062] <Window frame side locking component> The window frame locking members 51 are attached to the upper ends of the left and right vertical window frames 8a, 8b, and are configured as pieces with smaller vertical dimensions than the vertical window frames 8a, 8b. The pair of window frame locking members 51 each have a symmetrical shape. The vertical mounting positions of the pair of window frame locking members 51 relative to the vertical window frames 8a, 8b are aligned with each other.

[0063] 10, the window-frame-side locking member 51 is a plate-like member bent into an approximately U-shape and has a protruding plate portion 53 extending in the indoor / outdoor direction, and an attachment portion 54 bent at a substantially right angle outward in the in-plane direction from the indoor end of the protruding plate portion 53. The attachment portion 54 is provided with a locking groove 55 that opens outward in the in-plane direction.

[0064] As shown in Figure 8, the window-frame-side locking member 51 is attached to the outdoor portion of the upper end portion of each of the vertical window frames 8a, 8b by pressing the fin-shaped vertical frame locking pieces 50 provided at the outdoor ends of the vertical window frames 8a, 8b into the inside of the locking grooves 55 and clamping the vertical frame locking pieces 50 from both the indoor and outdoor sides with the mounting parts 54.

[0065] (Window frame side engagement part) The window-frame-side locking member 51 is provided with an engagement plate portion 56 that corresponds to the window-frame-side engagement portion. The engagement plate portion 56 is provided on the lower side of the extension plate portion 53 so as to be bent inward at a substantially right angle in the in-plane direction. The engagement plate portion 56 is disposed substantially horizontally in a state in which the window-frame-side locking member 51 is attached to the vertical window frames 8a, 8b. The engagement plate portion 56 is provided with an engagement hole 57 that penetrates the engagement plate portion 56 in the up-down direction (vertical direction). Therefore, the central axis of the engagement hole 57 is disposed facing the up-down direction. The engagement hole 57 is a circular hole with a closed periphery. However, when implementing the present invention, the shape of the engagement hole can be changed as appropriate.

[0066] The window-frame-side locking member 51 has a base portion 58 that is bent inward at a substantially right angle in the in-plane direction from the outdoor end of the extension plate portion 53. A biasing member 59 is attached to the outdoor side of the base portion 58, as described later.

[0067] <Locking member on the grille side> 7 and 9, the grille-side locking members 52 are attached to the upper ends of the left and right vertical frames 23a, 23b. The pair of grille-side locking members 52 have a symmetrical configuration, and their mounting positions in the up-down direction relative to the left and right vertical frames 23a, 23b match each other.

[0068] As shown in FIGS. 11 and 12, the grille-side locking member 52 has a casing 61, an engagement pin 62 that corresponds to the grille-side engagement portion, and a release mechanism 63.

[0069] (Casing) The casing 61 has a rectangular casing body 64 and a flat mounting flange portion 65, and is fixed to the inner side surfaces in the in-plane direction of each of the left and right vertical frame closing pieces 35a, 35b.

[0070] The casing body 64 has an upper plate 66, a lower plate 67, and an intermediate plate 68 arranged parallel to each other. The upper plate 66, the lower plate 67, and the intermediate plate 68 each have through holes 69a to 69c that penetrate in the up-down direction and are coaxial with each other. Each of the through holes 69a to 69c has a diameter that allows the engagement pin 62 to be inserted therethrough. Specifically, the through holes 69a to 69c have a diameter that is slightly larger than the outer diameter of the engagement pin 62. The engagement pin 62 and the release mechanism 63 are housed inside the casing body 64.

[0071] The mounting flange portion 65 has a plurality of mounting holes 70 (two in the illustrated example) which are elongated holes that are long in the vertical direction.

[0072] As shown in Fig. 9, the grille side locking member 52 (casing 61) is fixed to the vertical frame closing pieces 35a, 35b by screwing the mounting screw 71 inserted through the mounting hole 70 into the upper end of each of the left and right vertical frame closing pieces 35a, 35b. Specifically, when the grille main body 14 is in the closed state, the grille side locking member 52 is fixed below the engagement plate portion 56 constituting the window frame side locking member 51, and the lower surface of the engagement plate portion 56 and the upper surface of the upper plate 66 constituting the casing main body 64 are closely opposed to each other. This prevents the grille main body 14 from moving upward relative to the window device 2, and prevents the pivot 47 from slipping out of the engagement recess 42 of the bearing portion 40. The grille side locking member 52 can be adjusted in its vertical position relative to the vertical frame closing pieces 35a, 35b within the range in which the mounting screw 71 can move inside the mounting hole 70.

[0073] (Grating side engagement part) The engagement pin 62, which corresponds to the grille-side engagement part, is a rod-shaped member with a circular cross section and an outer diameter smaller than the inner diameter of the engagement hole 57. The engagement pin 62 is supported inside the casing body 64 with its central axis facing in the vertical direction. Furthermore, when the grille body 14 is in the closed state, the engagement pin 62 and the engagement hole 57 are arranged coaxially. The engagement pin 62 is a movable member that is moved downward by a release mechanism 63, as described below.

[0074] The engagement pin 62 has an upper end portion which can be inserted into and removed from the engagement hole 57 which constitutes the window-frame-side locking member 51 .

[0075] 9(A) and 12(A), under normal circumstances, the upper end of the engagement pin 62 protrudes significantly upward from the through-hole 69a in the upper plate 66 of the casing body 64, is inserted into the engagement hole 57 from below, and engages with the engagement hole 57 in the indoor / outdoor direction. The locking device 16 of this example prevents the grille body 14 from swinging open by engaging the upper end of the engagement pin 62 with the engagement hole 57 in the indoor / outdoor direction, and locks the grille body 14 in the closed position.

[0076] The portion of the engagement pin 62 other than its upper end is disposed inside the casing body 64 and is supported by the casing body 64. Specifically, the portion of the engagement pin 62 near the upper end is inserted and supported in a through hole 69a provided in the upper plate 66, and the portion of the engagement pin 62 near the lower end is inserted and supported in a through hole 69c provided in the intermediate plate 68. This prevents the engagement pin 62 from tilting regardless of the load acting on the engagement pin 62.

[0077] As shown in Fig. 9B and Fig. 12B, when a release mechanism 63, which will be described later, is activated in the event of a fire, the engagement pin 62 is moved downward. Then, the upper end of the engagement pin 62 is inserted downward through the engagement hole 57, and the engagement between the upper end of the engagement pin 62 and the engagement hole 57 in the indoor / outdoor direction is released. This releases the lock of the locking device 16.

[0078] (Release mechanism) The release mechanism 63 has a function of releasing the lock of the locking device 16 in the event of a fire. Specifically, the release mechanism 63 moves the engagement pin 62 downward, which is a direction capable of releasing the engagement between the upper end of the engagement pin 62 and the engagement hole 57 in the indoor / outdoor direction. Then, by inserting (pulling) the upper end of the engagement pin 62 into or out of the engagement hole 57, the engagement between the engagement hole 57 and the engagement pin 62 in the indoor / outdoor direction is released.

[0079] As shown in FIG. 12, the release mechanism 63 has a compression spring 72 which is an elastic member, and a melting member 73.

[0080] The compression spring 72 is disposed around the middle portion of the engagement pin 62. In other words, the engagement pin 62 is inserted through the compression spring 72. The compression spring 72 is also sandwiched in a compressed and deformed state between the lower surface of the upper plate 66 and a retaining ring 74 that is engaged with the middle portion of the engagement pin 62. As a result, the compression spring 72 applies a downward force to the engagement pin 62 via the retaining ring 74.

[0081] Melting member 73 is made of a low melting point alloy and has a lower melting point than the other members constituting locking device 16. Melting member 73 has the property of melting when it reaches a predetermined temperature (for example, about 60°C to 120°C), and functions as a temperature sensor.

[0082] The melting member 73 has a hat shape, and before it melts, it blocks the through hole 69b of the lower plate 67 from above. As a result, the melting member 73 prevents the engagement pin 62 from moving downward due to the force applied to the engagement pin 62 from the compression spring 72. In other words, the melting member 73 functions as a lid that blocks the through hole 69b of the lower plate 67.

[0083] The melting member 73 is composed of an insertion part 75 arranged inside the through hole 69b, and a lid body 76 having an outer diameter larger than the inner diameter of the through hole 69b, which is provided at the upper end part of the insertion part 75. The lower end part of the engagement pin 62 is elastically pressed against the upper surface of the lid body 76 by a compression spring 72.

[0084] In this example, the insertion part 75 constituting the melting member 73 is inserted into the through hole 69b, and the tip part of the insertion part 75 is exposed to the outside from the casing 61. This makes it easier to detect a temperature rise when a fire occurs, and even if a fire occurs indoors, the temperature of the melting member 73 can be brought closer to the temperature in the vicinity of the outdoor side of the window device 2 more quickly and accurately.

[0085] The release mechanism 63 further includes a stopper (retaining ring) 77 for restricting the amount of downward movement of the engagement pin 62. The stopper 77 is engaged with the middle part of the engagement pin 62, and when the melting member 73 melts and the engagement pin 62 moves downward, the stopper 77 comes into contact with the upper surface of the middle plate 68, restricting the amount of downward movement of the engagement pin 62.

[0086] 12(B), when a fire breaks out and the melting member 73 melts due to reaching a predetermined temperature, the engagement pin 62 is moved downward by the force of the compression spring 72. Then, the lower end of the engagement pin 62 penetrates the melting member 73 and protrudes downward from the through hole 69b of the lower plate 67. As a result, the upper end of the engagement pin 62 is inserted downward from the engagement hole 57, and the engagement between the upper end of the engagement pin 62 and the engagement hole 57 in the indoor / outdoor direction is released.

[0087] <Using Member> The fire grille 1 of this example further includes a biasing member 59 for biasing the grille body 14 toward the outdoor side so that the grille body 14 automatically swings open when the locking device 16 is released. In this example, the biasing member 59 is made of a compression coil spring. The biasing member 59 is fixed to the outdoor side of the base part 58 constituting the window frame side locking member 51 by using a fixing screw 60.

[0088] When the lattice main body 14 is locked in the closed position by the locking device 16, the biasing member 59 is biased against the outdoor side surface of the base portion 58 and the left and right vertical frame main bodies 34a, 34b (vertical frame closing pieces 35a, 35b) constituting the lattice main body 14. Outdoor side board ) is compressed between the indoor side and the

[0089] When the release mechanism 63 is activated and the engagement between the upper end of the engagement pin 62 and the engagement hole 57 in the indoor / outdoor direction is released, the left and right vertical frame bodies 34a, 34b are pushed out toward the outdoors by the biasing force of the biasing member 59, and the grille body 14 automatically swings open. When implementing the present invention, the biasing member can be omitted by adjusting the position of the center of gravity of the grille body 14 (for example, by placing the center of gravity on the outdoor side at the top).

[0090] <Angle restriction means> The fire grille 1 of this example further comprises an angle restriction means 78 between the grille body 14 and the window frame side locking member 51 in order to restrict the opening angle (degree of opening) of the grille body 14.

[0091] 9B, the angle restriction means 78 is made of a wire cut to a predetermined length, and both ends thereof are fixed to the upper parts of the left and right vertical frames 23a, 23b (vertical frame closing pieces 35a, 35b) constituting the grille main body 14, and to the window frame side locking member 51, respectively. Therefore, when the grille main body 14 swings open, the angle restriction means 78 braces itself between the grille main body 14 and the window frame side locking member 51, restricting the opening angle of the grille main body 14. The opening angle of the grille main body 14 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 environment of the outdoor side (corridor) of the grille main body 14, and can be restricted to, for example, about 10 degrees to 40 degrees (10 degrees in this example).

[0092] According to the fire grille 1 of this embodiment as described above, even if a fire breaks out indoors with all the louvers 18 fully closed, heat dissipation from the window device 2 is not blocked. That is, in the fire grille 1 of this example, when a fire breaks out indoors and the melting member 73 provided in the locking device 16 reaches a predetermined temperature, the melting member 73 melts and moves the engagement pin 62 downward. Then, the engagement between the engagement hole 57 and the upper end of the engagement pin 62 in the indoor / outdoor direction is automatically released, and the grille body 14 can be swung open around the pivot 47. At that time, since the outdoor side frame body 24 and the indoor side frame body 25 of the grille body 14 are integrated, the window frame side bracket 15 and the window frame side locking member 51 remain in the window frame 2. Therefore, according to the fire grille 1 of this example, it is possible to prevent the heat dissipation from the window device 2 from being hindered. As a result, even if a fire breaks out indoors with all the louvers 18 fully closed, it is possible to prevent the heat dissipation from the window device 2 from being blocked.

[0093] In particular, in this example, in the event of a fire, the grille body 14 can be swung open like a so-called outward-tilting window, widening the gap between the top of the window device 2 and the top of the grille body 14, allowing the rising high-temperature air to escape efficiently to the outside. This allows heat to be dissipated effectively from the window device 2. In addition, because the melting member 73 is disposed at the upper ends of the vertical frames 23a and 23b that constitute the grille body 14, it is easier to increase the temperature of the melting member 73 compared to when it is disposed on the bottom frame 22, etc.

[0094] In this example, the locking device 16 is composed of only two parts: the window-frame-side locking member 51 and the grille-side locking member 52 equipped with a release mechanism 63. This makes it possible to reduce the number of parts in the locking device 16. As a result, it is possible to reduce the number of installation steps for the locking device 16 and improve the ease of installation.

[0095] In addition, since the melting member 73 constituting the release mechanism 63 functions as a temperature sensor and as a lid that covers the through hole 69c of the casing 61, the grille-side locking member 52 equipped with the release mechanism 63 can be constructed compactly with a small number of parts. This allows for cost reduction and improves the design of the fire grille 1 from the indoor side.

[0096] In addition, the central axis of the engagement hole 57 provided in the window frame side locking member 51 and the central axis of the engagement pin 62 provided in the window grille side locking member 52 are arranged in the vertical direction, and a release mechanism 63 The movable direction of the engagement pin 62 is set downward, which coincides with the direction of the central axis. Indoor / outdoor direction This allows the fire grille 1 to project to the outdoor side in a reduced amount.

[0097] [Second Example of the Implementation Form] The second embodiment will be described with reference to FIGS.

[0098] In this example, only the structure of the pair of locking devices 16a is changed from the structure of the first embodiment. The structures of the grille body 14 and the window frame side bracket 15 are the same as those of the first embodiment.

[0099] The locking device 16a of this example is composed of two parts: a window-frame-side locking member 51a and a grille-side locking member 52a.

[0100] <Window frame side locking component> The window-frame-side locking member 51a of this example is attached to the upper end portions of the left and right vertical window frames 8a, 8b, and is configured in the shape of a piece whose vertical dimensions are smaller than those of the vertical window frames 8a, 8b.

[0101] As shown in Fig. 16, the window-frame-side locking member 51a is a plate-like member bent into a substantially U-shape, and has a protruding plate portion 53 extending in the indoor / outdoor direction, and a mounting portion 54 bent at a substantially right angle from the indoor end of the protruding plate portion 53 outward in the in-plane direction. The mounting portion 54 is provided with a locking groove 55 that opens outward in the in-plane direction. The mounting structure of the window-frame-side locking member 51a to the vertical window frames 8a, 8b is the same as the mounting structure of the window-frame-side locking member 51 according to the first example of the embodiment.

[0102] (Window frame side engagement part) The window frame side locking member 51a is provided with an engagement plate portion 56a corresponding to the window frame side engagement portion. The engagement plate portion 56a is provided at the outdoor side end of the extension plate portion 53 so as to be bent inward at a substantially right angle with respect to the in-plane direction. The engagement plate portion 56a is arranged with both side surfaces facing the indoor / outdoor direction when the window frame side locking member 51a is attached to the vertical window frames 8a and 8b. An engagement hole 57a is provided at the lower part of the engagement plate portion 56a, penetrating the engagement plate portion 56a in the indoor / outdoor direction. Therefore, the central axis of the engagement hole 57a is arranged facing the indoor / outdoor direction. The engagement hole 57a has a semi-elliptical shape with a recessed arc-shaped inner part (upper end) and is a notched hole that opens at the lower end of the engagement plate portion 46a. However, when implementing the present invention, the shape of the engagement hole can be changed as appropriate.

[0103] Unlike the structure of the first example of the embodiment described above, the window-frame-side locking member 51a in this example does not have a biasing member attached to it for biasing the lattice body 14 toward the outdoors. In this example, as described below, a biasing member 59 is attached to the lattice-side locking member 52a.

[0104] (Lattice side locking member) The grille-side locking members 52a in this example are attached to the upper ends of the left and right vertical frames 23a, 23b.

[0105] As shown in FIGS. 17 and 18, the grille-side locking member 52a has a casing 61a, an engagement pin 62a that corresponds to the grille-side engagement portion, and a release mechanism 63a.

[0106] (Casing) The casing 61a has a casing body 64a having a generally U-shaped cross section and a flat mounting flange portion 65, and is fixed to the inner side surfaces in the in-plane direction of each of the left and right vertical frame closing pieces 35a, 35b.

[0107] The casing body 64a has a pair of side plate portions 79 arranged on both sides in the in-plane direction, and Inside the roomThe pair of side plate portions 79 has a front plate portion 80 connecting the ends of the side plate portions 79 and the casing body 64a. An indoor side locking groove 81 and an outdoor side locking groove 82 are provided on the mutually facing inner surfaces of the pair of side plate portions 79 over the entire vertical length. A guide hole 83 which is a long hole extending in the vertical direction is provided in the vertical middle portion of the front plate portion 80. The width dimension of the guide hole 83 in the in-plane direction is slightly larger than the outer diameter of a shaft portion 84 (described later) constituting the engagement pin 62a, and the length dimension of the guide hole 83 in the vertical direction is sufficiently larger than the outer diameter of the shaft portion 84 constituting the engagement pin 62a. The outdoor side portion of the engagement pin 62a and the release mechanism 63a are housed inside the casing body 64a.

[0108] The mounting structure of the grille-side locking member 52a (casing 61a) to the vertical window frames 8a, 8b is the same as that of the grille-side locking member 52 according to the first embodiment. With the grille-side locking member 52a fixed to the upper ends of the vertical frame blocking pieces 35a, 35b, the upper half of the guide hole 83 faces the engagement hole 57a constituting the window frame-side locking member 51a in the indoor / outdoor direction. In other words, the lower half of the guide hole 83 is positioned in a portion that is offset downward from the engagement hole 57a.

[0109] (Grating side engagement part) The engagement pin 62a, which corresponds to the grille-side engagement portion, is composed of a screw (truss screw) with a head. The engagement pin 62a is arranged with its central axis facing the indoor / outdoor direction. The engagement pin 62a has a cylindrical shaft portion 84 arranged in the axial middle portion, an outward flange-like engagement flange portion 85 arranged at the indoor-side end portion, and a male thread portion 86 arranged at the outdoor-side end portion. In addition, when the grille body 14 is in the closed state, the engagement pin 62a and the engagement hole 57a are arranged coaxially. The engagement pin 62a is a movable member that is moved downward (translated) by a release mechanism 63a as described later.

[0110] The engagement pin 62a is fixed to a movable plate 87, which constitutes the release mechanism 63a, by screwing a male screw portion 86, which is inserted into the inside of the casing body 64a through the guide hole 83, to the movable plate 87, which will be described later. With the engagement pin 62a fixed to the movable plate 87, the shaft portion 84 and the engagement flange portion 85 are positioned on the indoor side relative to the front plate portion 80. The shaft portion 84 can be inserted into and removed from the engagement hole 57a.

[0111] Under normal circumstances, the engagement pin 62a is located at the upper end of the guide hole 83, and the shaft portion 84 of the engagement pin 62a is inserted into the engagement hole 57a from below. This causes the engagement flange portion 85 of the engagement pin 62a to engage in the indoor / outdoor direction with the portion of the engagement plate portion 56a that is present on the periphery of the engagement hole 57a. The locking device 16a of this example prevents the grille body 14 from swinging open by engaging the engagement flange portion 85 of the engagement pin 62a with the engagement plate portion 56a in the indoor / outdoor direction, and locks the grille body 14 in the closed position.

[0112] In the event of a fire, when the release mechanism 63a (described later) is activated, the engagement pin 62a is moved downward and moves to the lower end of the guide hole 83. Then, the shaft 84 of the engagement pin 62a is inserted downward from the engagement hole 57a, and the engagement between the engagement flange 85 and the engagement plate 56a in the indoor / outdoor direction is released. This releases the lock of the locking device 16a.

[0113] (Release mechanism) The release mechanism 63a has a function of releasing the lock of the locking device 16a in the event of a fire. Specifically, the release mechanism 63a moves the engagement pin 62a downward, which is a direction capable of releasing the engagement between the engagement flange 85 and the engagement plate 56a in the indoor / outdoor direction. Then, the shaft 84 is inserted and removed (pulled out) from the engagement hole 57a to release the engagement between the engagement flange 85 and the engagement plate 56a in the indoor / outdoor direction.

[0114] As shown in FIG. 18, the release mechanism 63a has a movable plate 87, a fixed plate 88, a compression spring 72a which is an elastic member, and a melting member 73a.

[0115] The movable plate 87 is configured in a rectangular plate shape, and is disposed inside the indoor side locking groove 81 provided in the casing body 64a. An upwardly convex lower locking portion 89 is provided at the lower portion of the movable plate 87. The upper end portion of the movable plate 87 is fixed to the casing body 64a via the melting member 73a. Therefore, the movable plate 87 cannot be displaced relative to the casing body 64a before the melting member 73a melts, but when a fire breaks out and the melting member 73a melts, it becomes possible to displace the movable plate 87 relative to the casing body 64a. Specifically, the movable plate 87 is disposed inside the indoor side locking groove 81. 81 This allows for downward movement along the

[0116] The fixing plate 88 is configured in a rectangular plate shape, is disposed inside the outdoor locking groove 82 provided in the casing body 64a, and is fixed to the casing body 64a with a fixing screw 90. A downwardly convex upper locking portion 91 is provided on the lower portion of the fixing plate 88. When implementing the present invention, the fixing plate can be omitted by directly providing the upper locking portion on a part of the casing body.

[0117] The compression spring 72a is disposed between the movable plate 87 and the fixed plate 88. Specifically, a lower locking portion 89 is inserted and locked into the lower end portion of the compression spring 72a, and an upper locking portion 91 is inserted and locked into the upper end portion of the compression spring 72a, so that the compression spring 72a is sandwiched in a compressed and deformed state between the movable plate 87 and the fixed plate 88. As a result, the compression spring 72a applies a downward force to the engagement pin 62a via the movable plate 87.

[0118] The melting member 73a is a temperature fuse made of a low melting point alloy, and has a characteristic of melting when a predetermined temperature (for example, about 60°C to 120°C) is reached. As shown in FIG. 18(A), the melting member 73a is formed in a flat plate shape, and is fixed by screws so as to span between the upper part of the movable plate 87 and the casing main body 64a. In this way, the melting member 73a prevents the engagement pin 62a from moving downward due to the force applied to the engagement pin 62a from the compression spring 72a. Note that the entire melting member 73a does not have to be a temperature fuse. A temperature fuse may be used in a part of the melting member 73a as long as it can be melted when a predetermined temperature is reached. In this case, a copper-based alloy or the like may be used at both ends.

[0119] As shown in Fig. 18(B), when a fire breaks out and the melting member 73a reaches a predetermined temperature and melts, the force of the compression spring 72a moves the movable plate 87 downward relative to the casing body 64a, and the engagement pin 62a is moved downward. As a result, the shaft portion 84 of the engagement pin 62a is inserted downward from the engagement hole 57a, and the engagement between the engagement flange portion 85 and the engagement plate portion 56a in the indoor / outdoor direction is released. In this example, the downward movement of the engagement pin 62a can be restricted by engagement with the lower end of the guide hole 83.

[0120] In this example, the biasing member 59 is fixed to the casing body 64a constituting the window-frame locking member 52a. Specifically, the biasing member 59 is fixed to a portion of the indoor side of the front plate 80 that is located above the guide hole 83 using a fixing screw 60. When the window-frame locking member 14 is locked in the closed position by the locking device 16a, the biasing member 59 is compressed between the indoor side of the front plate 80 and the upper part of the outdoor side of the engagement plate 56a constituting the window-frame locking member 51a. Therefore, when the release mechanism 63a is activated, the window-frame locking member 14 can be automatically swung open.

[0121] In this example having the above configuration, it is not necessary to dispose the engagement pin 62a with its central axis facing up and down inside the casing body 64a, so the dimensions of the casing body 64a in the indoor / outdoor direction can be reduced.

[0122] Furthermore, since a plate-shaped thermal fuse is used as the melting member 73a, the melting member 73a can be manufactured at low cost, which contributes to reducing the cost of the locking device 16a. The other configurations and effects are the same as those of the first embodiment.

[0123] [Third Example of the Implementation Form] The third embodiment will be described with reference to FIGS.

[0124] In this example, the structure of the portion that supports the lower part of the grille main body 14 so that it can swing freely has been changed from the structure in the first embodiment. Specifically, the structures of the window-frame side bracket 15a and the grille side bracket 20a have been changed from the structures in the first embodiment. The structures of the grille main body 14 and the locking device 16 are the same as those in the first embodiment.

[0125] In the structures of the first and second example embodiments, when the grille body 14 is swung open, only the portion between the top of the window device 2 and the top of the grille body 14 is opened. For this reason, in terms of improving heat dissipation from the window device 2, it is advantageous to increase the opening angle of the grille body 14. However, in a fire grille 1 installed facing a common corridor, for example, it may be difficult to make the opening angle of the grille body 14 sufficiently large.

[0126] Therefore, in this example, by changing the structure of the window frame side bracket 15a and the grille side bracket 20a, a function is added that not only does it open up the gap between the upper part of the window device 2 and the upper part of the grille main body 14 when the grille main body 14 is swung open, but it also opens up the gap between the lower part of the window device 2 and the lower part of the grille main body 14. In other words, the window frame side bracket 15a and the grille side bracket 20a form a lower sliding mechanism for the grille main body 14. This improves heat dissipation from the window device 2.

[0127] <Window frame side bracket> As shown in Fig. 19, the window frame bracket 15a is a plate-like member having a substantially flat shape, and is attached to the lower end of each of the vertical window frames 8a, 8b. The window frame bracket 15a is configured as a piece having a smaller vertical dimension than the vertical window frames 8a, 8b. The window frame bracket 15 has a larger dimension in the indoor / outdoor direction than the indoor side frame body 25 that constitutes the grille main body 14. The pair of window frame brackets 15a each have a symmetrical shape, and are arranged parallel to each other with a space in the in-plane direction.

[0128] The window-frame bracket 15a has a generally L-shaped protruding plate portion 44a and a mounting portion 45 provided at the indoor end of the protruding plate portion 44a.

[0129] The extending plate portion 44a has a lower plate portion 92 extending in the indoor / outdoor direction, and a vertical plate portion 93 extending upward from the indoor end of the lower plate portion 92.

[0130] The lower plate portion 92 has an outdoor opening engagement recess 94 that opens to the outdoor side at the bottom of the outdoor side end. The outdoor opening engagement recess 94 has a semi-elliptical shape with a concave arc-shaped back portion (indoor side end). The straight bottom side 95 of the outdoor opening engagement recess 94 is inclined downward as it approaches the outdoor side.

[0131] The lower plate portion 92 has an indoor side opening engagement recess 96 that opens to the indoor side at the top of the outdoor side end. The indoor side opening engagement recess 96 has a semi-elliptical shape with a concave arc-shaped back portion (outdoor side end). In this example, in order to form such an indoor side opening engagement recess 96, a hook portion 97 having a substantially L-shape is provided at the upper end of the outdoor side end of the lower plate portion 92.

[0132] The upper edge of the lower plate portion 92 is provided with an inclined guide portion 98 that is inclined downward as it approaches the outdoor side. The inclination angle of the inclined guide portion 98 with respect to the horizontal plane can be, for example, about 5 degrees to 30 degrees (15 degrees in this example). The indoor end of the inclined guide portion 98 is provided with an upper opening holding recess 99 that is recessed downward and opens upward. The upper opening holding recess 99 has a concave arc shape. The outdoor end of the inclined guide portion 98 is smoothly connected to the lower side of the indoor opening engagement recess 96.

[0133] The outdoor side edge of the vertical plate portion 93 is provided with a guide portion 100 that is curved in an arc shape centered on the central axis of the outdoor side opening engagement recess 94. The lower end of the guide portion 100 smoothly connects to the indoor side end of the upper opening holding recess 99.

[0134] <Lattice side bracket> As shown in FIG. 20, the grille side bracket 20a is a plate-like member, and has a base plate portion 39a bent into a crank shape, an outdoor side pivot 101, and an indoor side pivot .

[0135] The substrate portion 39a is bent in a crank shape so that the lower half is parallel to the upper half and is positioned outside in the in-plane direction. The upper half of the substrate portion 39a is provided with a plurality of through holes 41a (two in the illustrated example).

[0136] The outdoor pivot 101 and the indoor pivot 102 each have a cylindrical shape and are provided in the lower half of the base plate 39a. Specifically, the outdoor pivot 101 is provided in the lower part of the outdoor end of the lower half of the base plate 39a. The indoor pivot 102 is provided in the upper part of the indoor end of the lower half of the base plate 39a. The outdoor pivot 101 and the indoor pivot 102 protrude horizontally from the outer surface of the lower half of the base plate 39a in the in-plane direction. Therefore, the central axes of the outdoor pivot 101 and the indoor pivot 102 are arranged horizontally. As shown in FIG. 21(A), in the closed state of the lattice main body 14, the outdoor pivot 101 is arranged on the outdoor side of the locking device 16, and the indoor pivot 102 is arranged below the locking device 16.

[0137] The outdoor pivot 101 serves as the swing center when the grille body 14 starts to swing. On the other hand, the indoor pivot 102 serves as the sliding part when the grille body 14 slides toward the outdoor side, and also serves as the support axis after the grille body 14 finishes swinging.

[0138] The outdoor pivot 101 and the indoor pivot 102 are provided at their respective tips with outward flange-shaped retaining flanges 49a, 49b.

[0139] The grille side bracket 20a is fixed to the vertical frame closing pieces 35a, 35b by screwing a screw 43a inserted through a through hole 41a provided in the upper half of the base portion 39a into the lower end parts of the outer surfaces in the in-plane direction of the left and right vertical frame closing pieces 35a, 35b that constitute the indoor side frame body 25.

[0140] Furthermore, when implementing the present invention, the bracket on the grille side can be omitted, and the outdoor side pivot axis and the indoor side pivot axis can be provided directly on the frame body of the grille body.

[0141] As shown in Figures 21 (A) and 22 (A), when the grille body 14 is in the closed state, the outdoor side pivot 101 is rotatably engaged with the outdoor side opening engagement recess 94, and the indoor side pivot 102 is engaged with the upper opening retaining recess 99.

[0142] [Swinging and sliding movement of the grille body] 22(A)→(B), when the release mechanism 63 of the locking device 16 is actuated, the lattice main body 14 starts to swing about the outdoor pivot 101. Specifically, the lattice main body 14 is swung about the outdoor pivot 101 in a direction in which the indoor pivot 102 moves upward out of the upper opening retaining recess 99. At this time, the indoor pivot 102 moves upward and to the outdoor side along the guide part 100.

[0143] 22(B)→(C), as the swinging motion of the grille main body 14 progresses (the opening angle becomes larger), the outdoor-side pivot 101 moves along the lower edge 95 of the outdoor-side opening engagement recess 94 to the outdoor side due to the weight of the grille main body 14. At the same time, the indoor-side pivot 102 moves upward from the upper-side opening holding recess 99 and engages with the inclined guide portion 98.

[0144] As shown in Fig. 22(C), when the outdoor pivot 101 falls out of the outdoor-side opening engagement recess 94 and the indoor pivot 102 engages with the inclined guide portion 98, the indoor pivot 102 slides toward the outdoor side along the inclined guide portion 98, causing the lattice main body 14 to slide toward the outdoor side under its own weight. The sliding movement of the lattice main body 14 continues until the indoor pivot 102 engages with the indoor-side opening engagement recess 96, as shown in Fig. 22(D). In other words, the indoor-side opening engagement recess 96 functions as a stopper for the sliding movement of the lattice main body 14.

[0145] If there is any bending remaining in the wire that constitutes the angle restriction means 78 at the time when the indoor side pivot 102 engages with the indoor side opening engagement recess 96, the grille body 14 will further swing around the indoor side pivot 102 as the swing center. In contrast, if there is no bending remaining in the wire that constitutes the angle restriction means 78, the grille body 14 will not swing.

[0146] 21(B) and 22(D), when the indoor side pivot 102 engages with the indoor side opening engagement recess 96 and the sliding and swinging movement of the grille body 14 stops, the grille body 14 is supported by the window-frame side bracket 15a with the indoor side pivot 102 as a support axis. In addition, there is a wide opening between the bottom frame 22 that constitutes the grille body 14 and the window bottom frame 7.

[0147] In this example having the above configuration, by changing the structure of the window frame side bracket 15a and the grille side bracket 20a, when the grille main body 14 is swung open, it is possible to open not only the gap between the upper part of the window device 2 and the upper part of the grille main body 14, but also the gap between the lower part of the window device 2 and the lower part of the grille main body 14. This improves heat dissipation from the window device 2 and prevents stagnation of flammable gases generated from the window device 2 in the event of a fire.

[0148] Also, by changing the overall length of the inclined guide portion 98, it is possible to freely set the width of the opening between the sill 22 and the window sill 7. Furthermore, by changing the inclination angle of the inclined guide portion 98, it is also possible to adjust the time required for the lattice main body 14 to slide.

[0149] In addition, since outward flange-shaped anti-slip flange portions 49a, 49b are provided at the respective tips of the outdoor side pivot 101 and the indoor side pivot 102, it is possible to prevent the outdoor side pivot 101 and the indoor side pivot 102 from accidentally falling off from each part of the window frame side bracket 15a.

[0150] In addition, the lower sliding mechanism composed of the window frame side bracket 15a and the grille side bracket 20a in this example can of course be applied to the fire grilles of the first and second embodiments of the invention, and can also be implemented in combination with other fire grilles that have a structure that opens only the area between the upper part of the grille body and the upper part of the window device in the event of a fire. The other configurations and effects are the same as those of the first embodiment.

[0151] [Fourth Example of the Implementation Form]

[0152] The fourth embodiment will be described with reference to FIGS.

[0153] In this example, the structure of the grille body 14a and the pair of window frame side brackets 15b is changed from that of the first example of the embodiment. This allows the grille body 14a to be automatically swung open in the event of a fire, and also allows the grille body 14a to be manually opened when performing maintenance on the window device 2a. The structure of the locking device 16 is the same as that of the first example of the embodiment.

[0154] <Window frame side bracket> As shown in Figures 23 and 26, the window-frame bracket 15b is a plate-like member bent into a substantially U-shape and is attached to the lower end of each of the vertical window frames 8a, 8b. The window-frame bracket 15b is configured as a piece with a smaller vertical dimension than the vertical window frames 8a, 8b. The pair of window-frame brackets 15b each have a symmetrical shape and are arranged parallel to each other with a space in the in-plane direction.

[0155] The window frame side bracket 15b has a rectangular, flat extension plate portion 44 extending in the indoor / outdoor direction, an attachment portion 45 provided at the indoor end of the extension plate portion 44, and a fixed plate portion 103 bent inward at approximately a right angle in the in-plane direction from the outdoor end of the extension plate portion 44.

[0156] <Lattice body> The grille body 14a comprises a rectangular frame 17a and a number of louvers 18 supported inside the frame 17a so as to be able to open and close. The grille body 14a of this example does not comprise a screen door, unlike the structure of the first example of the embodiment. In this example, as shown in FIG. 24, the window device 2a is provided with a screen door screen 104. The screen door screen 104 is set into the window frame 3, further outdoors than the part into which the outer screen 5 is set, so as to be movable in the in-plane direction.

[0157] "Frame body" The frame body 17a has an upper frame 21a, a lower frame 22a, and left and right vertical frames 23c, 23d, and is composed of a rectangular outdoor frame body 24 arranged on the outdoor side, and left and right indoor side panels 105a, 105b arranged on the indoor side.

[0158] The louvers 18 are disposed inside the outdoor frame body 24. The indoor side panels 105a, 105b close both the left and right sides of the space between the louvers 18 and the window device 2a, improving visibility from the outdoor side.

[0159] The upper frame 21a consists only of an aluminum alloy upper frame body 26. The lower frame 22a consists only of an aluminum alloy lower frame body 30. The structures of the upper frame body 26 and the lower frame body 30 are almost the same as those of the first example of the embodiment.

[0160] The vertical frames 23c, 23d each have a vertical frame body 34a, 34b and vertical frame auxiliary pieces 106a, 106b, each made of an aluminum alloy. The vertical frame bodies 34a, 34b form the left and right vertical sides of the outdoor side frame body 24, and the vertical frame auxiliary pieces 106a, 106b form the indoor side panels 105a, 105b. The structure of the vertical frame bodies 34a, 34b is also substantially the same as that of the first example of the embodiment.

[0161] The vertical frame auxiliary pieces 106a, 106b are plate-like members having a substantially L-shaped cross section, and have substantially the same overall length (vertical dimension) as the vertical frame bodies 34a, 34b. The vertical frame auxiliary pieces 106a, 106b have a cover plate portion 107 extending in the indoor / outdoor direction, and an attachment plate portion 108 bent inward at a substantially right angle in the in-plane direction from the outdoor end of the cover plate portion 107. The grille-side locking member 52 constituting the locking device 16 is attached to the indoor side of the attachment plate portion 108.

[0162] In this example, the upper end portions of the vertical frame auxiliary pieces 106a, 106b are supported so as to be able to swing relative to the upper end portions of the vertical frame main bodies 34a, 34b. Specifically, the upper end portions of the mounting plate portions 108 constituting the vertical frame auxiliary pieces 106a, 106b and the upper end portions of the indoor side surfaces of the vertical frame main bodies 34a, 34b are connected to each other using upper hinges 109.

[0163] As a result, as shown in Figure 27, during maintenance work on the window device 2a, the outdoor side frame body 24 that constitutes the grille body 14 can be swung open around a swing axis located at the top of the grille body 14a, like a so-called protruding window. At this time, the upper end of the outdoor side frame body 24 becomes the swing end, and the lower end becomes the free end. Also, the vertical frame auxiliary pieces 106a, 106b remain in the window frame 2.

[0164] Except when maintenance is being performed, the vertical frame auxiliary pieces 106a, 106b and the vertical frame bodies 34a, 34b are fixed with fixing screws (not shown). Therefore, a maintenance worker can only swing open the outdoor side frame body 24 that constitutes the grille body 14a after removing the fixing screws. This allows the replacement of the screen door 104 and cleaning of the glass panels 10a, 10b.

[0165] In this example, the lower end portions of the vertical frame auxiliary pieces 106a, 106b are connected and supported to be swingable relative to the window frame bracket 15b. Specifically, the lower end portions of the mounting plate portions 108 constituting the vertical frame auxiliary pieces 106a, 106b and the fixing plate portion 103 constituting the window frame bracket 15b are connected to each other using the lower hinges 110.

[0166] As a result, as shown in FIG. 28, in the event of a fire, the grille body 14a can be swung open around a swing axis located at the bottom of the grille body 14a, like a so-called outward-tilting window. At this time, the lower end of the grille body 14a becomes the swing end, and the upper end becomes the free end. When the grille body 14a swings open in this way, the vertical frame auxiliary pieces 106a, 106b are integrated with the outdoor side frame body 24. Therefore, the window frame side locking member 51 and the window frame side bracket 15b remain in the window frame 2a. In this way, in this example, the opening pattern of the grille body 14a differs between when a fire occurs and when maintenance work is performed.

[0167] In this example having the above-mentioned configuration, the upper ends of the vertical frame main bodies 34a, 34b and the upper ends of the vertical frame auxiliary pieces 106a, 106b are connected to each other using upper hinges 109, so that maintenance work on the window device 2a can be performed by swinging open the outdoor side frame body 24 that constitutes the grille main body 14a, just like a so-called protruding window. The other configurations and effects are the same as those of the structure of the first example of the embodiment.

[0168] 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. Furthermore, the structures of the examples of the embodiment can be combined as appropriate as long as no contradiction occurs.

[0169] The present invention is not limited to the embodiments. For example, the structure of the window frame side locking member and the window grille side locking member constituting the locking device can be changed as appropriate. The window frame side engaging portion and the window grille side engaging portion are not limited to the engaging hole and the engaging pin, and can be changed as appropriate to other structures, such as those having a hook shape. The structure of the release mechanism can also be changed as appropriate. The release mechanism can be provided only in the window frame side locking member, or can be provided in both the window grille side locking member and the window frame side locking member.

[0170] In the embodiment, a case where a wire is used as the angle restriction means for restricting the opening angle of the grille body has been 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 grille body toward the outdoors can be used as the angle restriction means. [Explanation of symbols]

[0171] 1 Fire grill 2, 2a Window device 3. Window Frame 4. Inner Shoji Screen 5. Outside Shoji Screen 6 Window Frame 7 Window sill 8a, 8b Window vertical frame 9a, 9b Shoji frame 10a, 10b Glass panels 11a, 11b Upper guide rail 12a, 12b Roller 13a, 13b Lower guide rail 14, 14a Lattice body 15, 15a Window frame side bracket 16, 16a Locking device 17, 17a frame frame 18 Louver 19 Screen door 20, 20a Lattice side bracket 21 Upper stile 22 Lower stile 23a, 23b stiles 24 Outdoor side frame 25 Indoor frame 26 Upper frame body 27 Upper stile blockage piece 28a, 28b, 28c sealing members 29a, 29b tapping screws 30 Lower frame body 31 Lower stile blockage piece 32 Lower stile locking part 33 Lower frame locking piece 34a, 34b Vertical frame body 35a, 35b vertical stile blockage piece 37a, 37b Support pin 38 Crank arm 39 Circuit Board 40 Bearing section 41, 41a through hole 42 Engagement recess 43 Screw 44, 44a: Support plate 45 Mounting part 46 Extension plate part 47 Axis 48 Locking groove 49, 49a, 49b Anti-slip flange 50 Vertical frame locking piece 51, 51a Window frame side locking member 52, 52a Lattice side locking member 53 Support plate 54 Mounting part 55 Locking groove 56, 56a Engagement plate portion 57, 57a Engagement hole 58 Pedestal 59 Pressing member 60 Fixing screw 61, 61a Casing 62, 62a Engagement pin 63, 63a release mechanism 64, 64a Casing body 65 Mounting flange 66 Upper Plate 67 Lower plate 68 Intermediate plate 69a~69c through hole 70 Mounting hole 71 Mounting screw 72, 72a Compression spring 73, 73a Melting member 74 Retaining ring 75 Insertion section 76 Lid 77 Stopper 78 Angle control means 79 Side plate part 80 Front plate part 81 Indoor side locking groove 82 Outdoor side locking groove 83 Guide hole 84 Shaft 85 Engagement flange 86 Male thread 87 Movable plate 88 Fixed plate 89 Lower locking part 90 Fixing screw 91 Upper locking part 92 Lower plate part 93 Vertical plate section 94 Outdoor side opening engagement recess 95 Bottom 96 Indoor side opening engagement recess 97 Hook part 98 Incline guide section 99 Upper opening holding recess 100 Guide part 101 Outdoor side pivot 102 Indoor Pivot 103 Fixed plate part 104 Screen door 105a, 105b Indoor side panel 106a, 106b Stiles auxiliary pieces 107 Cover plate part 108 Mounting plate 109 Upper hinge 110 Lower hinge

Claims

1. A window frame side bracket attached to a lower portion of a vertical window frame of a window device; A grille body having a rectangular frame shape, a frame body whose lower part is supported so as to be able to swing relative to the window frame side bracket, and a plurality of louvers supported inside the frame body so as to be able to open and close; a locking device that has a window frame side locking member attached to an upper portion of the vertical window frame and a grille side locking member attached to an upper portion of the vertical frame of the frame body, and locks the grille body in a closed position; The locking device includes a release mechanism that detects that a predetermined temperature has been reached and releases the lock, The window frame side locking member has a window frame side engaging portion having an engaging hole, the window-frame-side locking member has an engagement pin that can be inserted into and removed from the engagement hole, and has a window-frame-side engagement portion that can engage with the window-frame-side engagement portion in the indoor / outdoor direction, the release mechanism is provided in the grille-side locking member and moves the grille-side engagement portion, which is a movable member; When the release mechanism is activated, the grille body is swung open. Fire safety grid.

2. A window frame side bracket attached to a lower portion of a vertical window frame of a window device; A grille body having a rectangular frame shape, a frame body whose lower part is supported so as to be able to swing relative to the window frame side bracket, and a plurality of louvers supported inside the frame body so as to be able to open and close; a locking device that has a window frame side locking member attached to an upper portion of the vertical window frame and a grille side locking member attached to an upper portion of the vertical frame of the frame body, and locks the grille body in a closed position; The locking device includes a release mechanism that detects that a predetermined temperature has been reached and releases the lock, The grille body further includes a grille side bracket fixed to a lower portion of the frame body, One of the window frame bracket and the grille bracket has a pivot axis that is a pivot center of the grille body, the pivot axis being horizontally disposed and located on the outdoor side relative to the locking device, When the release mechanism is activated, the grille body is swung open. Fire safety grid.

3. A window frame side bracket attached to a lower portion of a vertical window frame of a window device; A grille body having a rectangular frame shape, a frame body whose lower part is supported so as to be able to swing relative to the window frame side bracket, and a plurality of louvers supported inside the frame body so as to be able to open and close; a locking device that has a window frame side locking member attached to an upper portion of the vertical window frame and a grille side locking member attached to an upper portion of the vertical frame of the frame body, and locks the grille body in a closed position; The frame body has an upper frame, a lower frame, and the left and right vertical frames, and is composed of an outdoor side frame body on the inside of which the louvers are arranged, and an indoor side frame body, The upper frame includes an upper frame body constituting the upper edge of the outdoor side frame body, and an upper frame closing piece constituting the upper edge of the indoor side frame body, which closes the gap between the upper frame body and the window upper frame constituting the window frame when the grille body is in a closed state; The bottom frame includes a bottom frame main body constituting the bottom edge of the outdoor side frame body, and a bottom frame closing piece constituting the bottom edge of the indoor side frame body, which closes the gap between the bottom frame main body and the window bottom frame constituting the window frame when the grille main body is in a closed state; Each of the vertical frames has a vertical frame body constituting the left and right vertical sides of the outdoor frame body, and a vertical frame closing piece constituting the left and right vertical sides of the indoor frame body and closing the gap between the vertical frame body and the vertical window frame when the grille body is in a closed state, The grille body further includes a screen door that closes an opening of the outdoor side frame body, The locking device includes a release mechanism that detects that a predetermined temperature has been reached and releases the lock, When the release mechanism is activated, the grille body is swung open. Fire safety grid.

4. A window frame side bracket attached to a lower portion of a vertical window frame of a window device; A grille body having a rectangular frame shape, a frame body whose lower part is supported so as to be able to swing relative to the window frame side bracket, and a plurality of louvers supported inside the frame body so as to be able to open and close; a locking device that has a window frame side locking member attached to an upper portion of the vertical window frame and a grille side locking member attached to an upper portion of the vertical frame of the frame body, and locks the grille body in a closed position; The frame body has an upper frame, a lower frame, and the left and right vertical frames, and is made up of an outdoor side frame body on the inside of which the louvers are arranged, and left and right indoor side panels, The upper frame is composed only of an upper frame body constituting the upper side of the outdoor side frame body, The lower frame is composed only of a lower frame body that constitutes the lower side of the outdoor side frame body, Each of the vertical frames has a vertical frame main body constituting the left and right vertical sides of the outdoor side frame body, and a vertical frame auxiliary piece constituting the indoor side panel, the upper end of which is swingably connected to the upper end of the vertical frame main body and the lower end of which is swingably connected and supported to the window frame side bracket, The locking device includes a release mechanism that detects that a predetermined temperature has been reached and releases the lock, When the release mechanism is activated, the grille body is swung open. Fire safety grid.

5. The window frame brackets are attached to the lower portions of the left and right window vertical frames, The window frame side locking members are attached to the upper portions of the left and right vertical window frames, The grille side locking members are attached to the upper portions of the left and right vertical frames, A fire grate according to any one of claims 1 to 4.

6. The window frame side locking member has a window frame side engagement portion, The grille-side locking member has a grille-side engaging portion that can engage with the window frame-side engaging portion in the indoor / outdoor direction, At least one of the window frame side engaging portion and the grille side engaging portion is a movable member that is moved by the release mechanism. A fireproof grille according to any one of claims 2 to 4.

7. 7. The fire grille according to claim 6, wherein the release mechanism is provided on the grille-side locking member and causes the grille-side engaging portion to move.

8. The window frame side engagement portion has an engagement hole, the grille side engagement portion has an engagement pin that can be inserted into and removed from the engagement hole, A fire grate according to claim 7.

9. 9. The fire grille according to claim 1, wherein the engagement holes and the engagement pins are arranged with their respective central axes pointing in the vertical direction.

10. 9. The fire grille according to claim 1, wherein the engagement holes and the engagement pins are arranged with their respective central axes directed in the indoor / outdoor directions.

11. The release mechanism includes an elastic member that applies a force to the grille side engagement portion in a direction to release the engagement with the window frame side engagement portion in the indoor / outdoor direction. A fireproof grille according to any one of claims 1 and 7 to 10.

12. The release mechanism further includes a melting member that melts or melts when the predetermined temperature is reached; The melting member prevents the grille-side engaging portion from moving in a direction to release the engagement with the window frame-side engaging portion in the indoor / outdoor direction due to a force applied to the grille-side engaging portion from the elastic member. A fire grate according to claim 11.

13. The grille body further includes a grille side bracket fixed to a lower portion of the frame body, Either the window frame bracket or the grille bracket has a pivot axis that serves as the swing center of the grille body and whose central axis is horizontally disposed. A fire protection grille according to any one of claims 1, 3 and 4.

14. The fire grille according to claim 13, wherein the pivot is disposed on the exterior side of the locking device.

15. The frame body has an upper frame, a lower frame, and the left and right vertical frames, and is composed of an outdoor side frame body on the inside of which the louvers are arranged, and an indoor side frame body, The upper frame includes an upper frame body constituting the upper edge of the outdoor side frame body, and an upper frame closing piece constituting the upper edge of the indoor side frame body, which closes the gap between the upper frame body and the window upper frame constituting the window frame when the grille body is in a closed state; The bottom frame includes a bottom frame main body constituting the bottom edge of the outdoor side frame body, and a bottom frame closing piece constituting the bottom edge of the indoor side frame body, which closes the gap between the bottom frame main body and the window bottom frame constituting the window frame when the grille main body is in a closed state; Each of the vertical frames has a vertical frame body constituting the left and right vertical sides of the outdoor frame body, and a vertical frame closing piece constituting the left and right vertical sides of the indoor frame body and closing the gap between the vertical frame body and the vertical window frame when the grille body is in a closed state, The grille body further includes a screen door that closes the opening of the outdoor side frame body. A fire grate according to claim 1 or 2.

16. The frame body has an upper frame, a lower frame, and the left and right vertical frames, and is made up of an outdoor side frame body on the inside of which the louvers are arranged, and left and right indoor side panels, The upper frame is composed only of an upper frame body constituting the upper side of the outdoor side frame body, The lower frame is composed only of a lower frame body that constitutes the lower side of the outdoor side frame body, Each of the vertical frames has a vertical frame body constituting the left and right vertical sides of the outdoor side frame body, and a vertical frame auxiliary piece constituting the indoor side panel, the upper end of which is swingably connected to the upper end of the vertical frame body and the lower end of which is swingably connected and supported to the window frame side bracket. A fire grate according to claim 1 or 2.

17. A fireproof grille according to any one of claims 1 to 16, further comprising an angle restricting means for restricting an opening angle of the grille body.

18. A fireproof grille according to any one of claims 1 to 17, further comprising a biasing member that biases the grille body toward the outdoor side.

Images