Screen-equipped opening and closing devices and release parts

Abstract

To provide an opening / closing device equipped with a release component capable of easily releasing a closed state of a screen by a screen tightening mechanism when necessary while preventing the screen of the opening / closing device from being turned up and suddenly released from the closed state by the screen tightening mechanism in the event of a fire and at normal times, and to provide such a release component.SOLUTION: A screen release component for releasing the closed state by a tightening mechanism of a screen for maintaining the screen movable in the vertical direction in the closed state releases the closed state by the tightening mechanism of the screen by releasing the locking of the tightening mechanism of the screen and a locked part to which the tightening mechanism is locked in the closed state by the screen.SELECTED DRAWING: Figure 16

Description

[Technical Field]

[0001] The present invention relates to an opening and closing device with a screen and a release part, and in particular to a fire protection opening and closing device that can be used as a fire protection facility. [Background technology]

[0002] In the unlikely event of a fire, there is a demand for installing fire prevention equipment at building openings to prevent possible personal injury and the spread of fire. In recent years, fire opening and closing devices equipped with a flexible sheet-like screen that can be rolled up and unrolled along a frame provided on the inner periphery of the building opening have been used as such fire prevention equipment.

[0003] For example, Japanese Patent Application Laid-Open No. 8-303147 discloses an opening and closing device equipped with a roll screen in which a weight bar 6 is attached to the lower end of the fabric 2 serving as the screen in order to maintain the fabric 2 in a stretched state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-303147 Summary of the Invention [Problem to be solved by the invention]

[0005] In the opening and closing device described in Patent Document 1, the weight of the weight bar 6 pulls the screen fabric 2 made of a non-flammable or flame-retardant material such as silica cloth downward, maintaining a stretched state. This prevents flames from penetrating between the interior and exterior of the building in the event of a fire, and is somewhat effective in protecting privacy during normal times. However, in the opening and closing device of Patent Document 1, in order to allow people to pass through during an evacuation, the vertical side of the fabric 2 is left free and the weight bar 6 and the bottom end of the fabric are divided. Therefore, with the opening and closing device of Patent Document 1, there is a possibility that the fabric 2 will be turned up and the closed state will be released due to deformation of the opening in the event of a fire or negative pressure generated by indoor air circulation or strong winds during normal times. Therefore, with the opening and closing device of Patent Document 1, there is a risk that flames may penetrate from the inside to the outside in the event of a fire, making it impossible to provide fire protection, and there is also a risk that privacy may not be sufficiently protected during normal times. Furthermore, there is a demand for technology that allows the opening and closing state of the opening and closing device to be released from the outside when firefighters enter from outside in the event of a fire, or during fire drills, etc.

[0006] The present invention has been made to solve such problems, and aims to provide an opening and closing device equipped with a release part that can easily release the closed state of the screen, which is maintained by the screen tightening mechanism, from the outside when necessary, while using the screen tightening mechanism to prevent the screen of the opening and closing device from being flipped up and suddenly released from the closed state during fires and normal times, and the release part. [Means for solving the problem]

[0007] In order to solve the above problems, the opening and closing device of the present invention includes a screen whose widthwise ends are surrounded by left and right guide frames and which is wound up and unwound along the left and right guide frames, a screen tightening mechanism provided at the lower end of the screen, and a screen release component that releases the closed state caused by the tightening mechanism. 、 the release element is attached to a lower end of the screen; The release part is attached to the lower end of the screen so as to be movable in the longitudinal direction. It is characterized by the following.

[0008] In the opening and closing device of the present invention, it is preferable that the release component of the screen releases the closed state of the screen tightening mechanism by releasing the engagement between the screen tightening mechanism and the engaging portion to which the tightening mechanism is engaged when the screen is in the closed state.

[0011] In the opening and closing device of the present invention, it is preferable to have an attachment part for attaching the release part to the lower end of the screen, an operating part that is operated when moving the release part, and a release part that releases the closed state created by the tightening mechanism.

[0012] In the opening and closing device of the present invention, it is preferable that the release component releases the closed state by the tightening mechanism by moving the release component from a non-release position that does not release the closed state by the tightening mechanism to a release position that releases the closed state by the tightening mechanism.

[0013] The opening and closing device of the present invention preferably further comprises an indicator member that indicates the release position.

[0014] In the opening and closing device of the present invention, it is preferable that the release component is fixed in the non-release position. [Effects of the Invention]

[0016] According to the present invention, in the event of a fire or during normal times, the screen tightening mechanism prevents the screen of the opening and closing device from being flipped up and the closed state being released unexpectedly, and when necessary, the closed state of the screen tightening mechanism can be easily released from the outside. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a central vertical cross-sectional view of a fire protection opening and closing device according to an embodiment. [Figure 2] Cross-sectional view of the same [Figure 3] Enlarged view of the main part of the screen [Figure 4] Enlarged view of the bottom frame [Figure 5] Enlarged view of the main part at the bottom longitudinal end of the right guide frame [Figure 6] An enlarged view of the lower frame and the tightening mechanism, showing the state in which the tightening mechanism is engaged with the lower frame. [Figure 7] FIG. 10 is an enlarged view of the lower frame and the clamping mechanism, showing the state in which the clamping mechanism and the lower frame are disengaged; [Figure 8] (A) to (E) are a plan view, a front view, a right side view, a left side view, and a bottom view of the base member, respectively. [Figure 9] (A) to (E) are a plan view, a front view, a right side view, a left side view, and a bottom view of the latch member, respectively. [Figure 10] Schematic perspective view of the tightening mechanism [Figure 11] FIG. 10 is a diagram showing a state in which the base member and the latch member are connected to each other. [Figure 12] 1A to 1E are a plan view, a front view, a right side view, a left side view, and a bottom view of the release part of this embodiment, respectively. [Figure 13] (A) and (B) are perspective views of the release part of this embodiment. [Figure 14] Reference diagram showing the use of fire protection opening and closing devices [Figure 15] Reference diagram showing the use of fire protection opening and closing devices [Figure 16] Reference diagram showing the use of fire protection opening and closing devices DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification, common components will be designated by common terms, will be illustrated in substantially the same manner in each drawing, and detailed descriptions will be omitted, and will be indicated by the same reference numerals as necessary.

[0019] Fig. 1 is a central vertical cross-sectional view of an opening and closing device provided with a screen release component that releases the closed state maintained by the screen closed state maintaining mechanism according to this embodiment, and Fig. 2 is a horizontal cross-sectional view of the same. The opening and closing device 1 of this embodiment is disposed in or inside an opening in a building or structure such as a house, building, warehouse, factory, underground shopping mall, tunnel, or vehicle loading platform, and can be used as a shutter device that opens and closes the opening, or partitions and opens the space inside the structure, but as a particularly preferred embodiment, an example of a window shutter device that is attached to the interior side of a sash window in an opening in a building will be described.

[0020] As shown in FIGS. 1 and 2, the opening and closing device 1 of this embodiment includes a right guide frame 2, a left guide frame 3, a lower frame 4, a screen 5, and a storage box 6.

[0021] The fire opening and closing device 1 is attached to an inner peripheral surface 7a of an opening 7 such as a window or an entrance provided in a building. In this embodiment, the inner peripheral surface 7a is formed by a frame 8 attached to the opening 7, as in a wooden construction or reinforced concrete construction. The fire opening and closing device 1 may be attached directly to the opening 7 without attaching the frame 8.

[0022] Since the right guide frame 2 and the left guide frame 3 have substantially the same configuration, only a configuration example of the right guide frame 2 will be described, and a configuration example of the left guide frame 3 will be omitted. In this embodiment, the right guide frame 2 includes an outer guide portion 21 and an inner guide portion 22, as shown in FIG. 2. The outer guide portion 21 is elongated and has a substantially U-shaped cross section. Specifically, as shown in FIG. 2, the outer guide portion 21 includes a first wall portion 21a abutting against the inner circumferential surface 7a, a second wall portion 21b located on the outdoor side of the opening 7, a third wall portion 21c located on the indoor side of the opening 7, and a pair of fourth wall portions 21d facing the left guide frame 3. In the right guide frame 2 of this embodiment, the first wall portion 21a, the second wall portion 21b, and the third wall portion 21c are configured so that, when the fire opening / closing device 1 is attached to the opening 7, the longitudinal ends on the bottom frame 4 side abut against the inner circumferential surface 7a to which the bottom frame 4 is attached. In addition, as shown in Figure 5, the pair of fourth wall portions 21d have their longitudinal ends on the lower frame side cut out, and when the fire protection opening and closing device 1 is attached to the opening 7, the longitudinal ends on the lower frame 4 side are configured to abut against the upper surface 44a of the upper portion 44 of the lower frame 4 described later.

[0023] A pair of outdoor-side protruding walls 21e are formed at the outdoor-side end of first wall 21a. The pair of outdoor-side protruding walls 21e have bending portions 21f at their tips that bend them toward each other. In outer guide 21, outdoor storage portion 21g is formed by first wall 21a, the pair of outdoor-side protruding walls 21e, and bending portions 21f.

[0024] A pair of indoor-side protruding wall portions 21h are formed at the indoor-side end of the first wall portion 21a. The pair of indoor-side protruding wall portions 21h have bending portions 21i at their tips that bend them toward each other. In the outer guide portion 21, the first wall portion 21a, the pair of indoor-side protruding wall portions 21h, and the bending portions 21i form an indoor-side storage portion 21j.

[0025] The first wall portion 21a is formed with a pair of protruding wall portions 21k between the pair of outdoor-side protruding wall portions 21e and the pair of indoor-side protruding wall portions 21h.

[0026] An opening 21l is formed between the pair of fourth wall portions 21d. A pair of protrusions 21m that protrude toward the first wall portion 21a is formed at the end of the pair of fourth wall portions 21d on the opening 21l side. An end of the bottom frame 11 to which the leading edge of the screen 5 is attached fits into the opening 21l, and when the screen 5 is wound up and unwound, the bottom frame 11 slides up and down while being guided by the pair of protrusions 21m.

[0027] In this embodiment, a guide frame reinforcement member 23 is provided on the inner periphery of the outer guide portion 21. In this embodiment, the guide frame reinforcement member 23 is provided from the upper longitudinal end of the right guide frame 2 to the imaginary line position of the upper surface 44a of the upper portion 44 where a recess 42 of the lower frame 4, which will be described later, is formed. In other words, in this embodiment, the guide frame reinforcement member 23 is not provided below the upper surface 44a of the lower frame 4. As shown in FIG. 2 , the guide frame reinforcement member 23 of this embodiment is formed along the entire inner periphery of the outer guide portion 21 in the longitudinal direction.

[0028] The guide frame reinforcement 23 supports the outer guide portion 21 from the inside, thereby giving the outer guide portion 21 rigidity to withstand deformation due to external forces caused by a fire, and preventing flames from penetrating the outer guide portion 21 from both indoors and outdoors.

[0029] The outer guide portion 21 may be, for example, an aluminum molded product, and the guide frame reinforcement member 23 may be, for example, a steel molded product. In this embodiment, the outer guide portion 21 and the guide frame reinforcement member 23 are fastened together to the inner peripheral surface 7a of the frame 8 with screws, as shown in FIG.

[0030] In this embodiment, a heat-foaming material 9 is provided as a heat-foaming material 9b on the opening side of the reinforcement material on the indoor side of the guide frame reinforcement material 23, at least a portion of which faces the inner guide portion 22. In addition, in this embodiment, a flame-retardant (e.g., chloroprene) sponge material SP is provided on the inner guide portion 22, at least a portion of which faces the outdoor side of the guide frame reinforcement material 23.

[0031] The outdoor-side storage section 21g accommodates a heat-foaming material 9 as the guide frame opening-side heat-foaming material 9c along both ends. The heat-foaming material 9 is fixed to the outdoor-side storage section 21g via adhesive, double-sided tape, or the like. The heat-foaming material 9 expands when heated, providing fire resistance and fire prevention. Therefore, even if a gap occurs between the right guide frame 2 and the inner peripheral surface 7a during a fire due to frame deformation or distortion of the frame, the heat-foaming material 9 closes the gap, preventing flames from penetrating inside and outside the building. For example, Sekisui Chemical Co., Ltd.'s Fi-Block (registered trademark) can be used as the heat-foaming material 9.

[0032] First wall portion 21a of outer guide portion 21 is fixed to inner circumferential surface 7a, and outdoor storage portion 21g is blocked by inner circumferential surface 7a, so that heat-foamable material 9 is contained between inner circumferential surface 7a and outer guide portion 21. Therefore, even if heat-foamable material 9 peels off from outdoor storage portion 21g due to deterioration of adhesives or the like over time or due to melting of adhesives (approximately 120°C) before heat-foamable material 9 starts to expand (approximately 200°C), its attachment position is maintained, and loss of function of heat-foamable material 9 is suppressed.

[0033] In this embodiment, a gap-hiding material 10 such as an elastic material is placed in the indoor storage section 21j where the heated foam material 9 is not placed, and light leakage from the outdoors due to the gap that occurs between the inner surface 7a and the first wall section 21a is suppressed.

[0034] FIG. 3 is an enlarged view of a main portion of the screen. The inner guide portion 22 can be, for example, an aluminum molded product, and is formed of a cylindrical section having slits 22a as guide grooves along which the vertical sides 5a of both edges of the screen 5 slide, as shown in FIGS. 2 and 3. In this embodiment, the inner guide portion 22 has the slits 22a formed by fitting the outdoor-side member 22c into the indoor-side member 22b. The inner guide portion 22 is formed elongated along the outer guide portion 21 and is placed independently on the lower frame 4 disposed at (engulfed in) the lower end of the outer guide portion 21 without being fixed to the outer guide portion 21. In other words, the inner guide portion 22 is housed within the outer guide portion 21 so that clearances are formed around all sides of the inner guide portion 22.

[0035] The lower frame 4 can be, for example, an aluminum molded product, and as shown in Figures 1 and 2, is an elongated member fixed to the inner peripheral surface 7a between the lower ends of the right guide frame 2 and the left guide frame 3, with its cross section formed in a substantially C-shape. The back surface 41a of the bottom 41 of the lower frame 4 is the mounting surface for the inner peripheral surface 7a, and an upper portion 44 on the side opposite the bottom 41 is provided with a recess 42 into which the lower end of a bottom frame 11, which is provided at the lower end of the screen 5 described below, fits.

[0036] In particular, in this embodiment, the lower frame 4 is configured so that both sides of the longitudinal end 4E do not come into contact with the right guide frame 2 and the left guide frame 3. In other words, the lower frame 4 in this embodiment is configured so that there is a gap between both sides of the longitudinal end 4E and the right guide frame 2 and the left guide frame 3.

[0037] The lower frame 4 of this embodiment is provided with a lower frame reinforcement member 43. The lower frame reinforcement member 43 can be a molded part made of stainless steel or steel, and in this embodiment, it is formed over the entire length of the lower frame 4, abutting against the bottom 41 of the lower frame 4 and conforming to the recess 42, thereby supporting the lower frame 4 from the inside. By providing this lower frame reinforcement member 43, the rigidity of the lower frame 4 is increased, suppressing deformation due to external forces caused by a fire, and even if flames reach the lower frame 4 during a fire, it is possible to prevent the flames from penetrating between the indoor and outdoor areas.

[0038] Specifically, in the longitudinal cross section of the lower frame reinforcement 43 of this embodiment, the lower frame reinforcement 43 is formed from a bottom 43a that abuts the bottom 41 of the lower frame 4, a pair of upright portions 43b extending from both ends of the bottom 43a toward the upper portion 44 of the lower frame 4, and a pair of bent portions 43c extending in the indoor / outdoor direction from the ends of the pair of upright portions 43b on the upper portion 44 side of the lower frame 4.

[0039] The bottom 43a has a dimension in the longitudinal cross section of the lower frame reinforcement 43 that is equal to the distance between a pair of outdoor-side protruding wall portions 41e and a pair of indoor-side protruding wall portions 41h of the lower frame 4, which will be described later. The bottom of the bottom frame 11 abuts against this bottom 43a when the screen 5 is closed. The pair of bent portions 43c are configured parallel to the bottom 43a, and the indoor-side end and the outdoor-side end are each covered by the upper portion 44 of the lower frame 4.

[0040] In particular, in this embodiment, the lower frame reinforcement 43 is formed over the entire length of the lower frame 4, and therefore the lower frame reinforcement 43 is also configured so that both sides of the longitudinal end 43E do not come into contact with the right guide frame 2 and the left guide frame 3. In other words, the lower frame reinforcement 43 of this embodiment is configured so that there is a gap between both sides of the longitudinal end 43E and the right guide frame 2 and the left guide frame 3.

[0041] As described above, in this embodiment, the guide frame reinforcement 23 is not provided below the upper surface 44a of the lower frame 4, and the lower frame reinforcement 43 is not provided between either side of the longitudinal end 43E of the lower frame 4 and the right guide frame 2 and the left guide frame 3. That is, in this embodiment, a space where neither the guide frame reinforcement 23 nor the lower frame reinforcement 43 is provided, i.e., a space S for absorbing thermal expansion of the frame reinforcement, is secured in part of the joint between the right guide frame 2 and the left guide frame 3 and the lower frame 4. The longitudinal end 43E of the lower frame reinforcement 43 and the longitudinal end 23E of the guide frame reinforcement 23 face this space S.

[0042] The fire opening / closing device 1 of this embodiment has a heating foam material 9 in this space S as the guide frame lower end heating foam material 9a. Specifically, in this embodiment, the heating foam material 9 is fixed to the inner surface of the first wall portion 21a of the outer guide portion 21 of the right guide frame 2 via adhesive, double-sided tape, or the like. In this embodiment, as shown in the enlarged view of the main portion of the longitudinal lower end side of the right guide frame 2 in FIG. 5, the heating foam material 9 is fixed to the longitudinal end (longitudinal lower end) of the first wall portion 21a on the lower frame 4 side, and is fixed with a gap between it and the longitudinal end 23E of the guide frame reinforcement member 23. In addition, in this embodiment, the heating foam material 9 is fixed with a gap between it and the second wall portion 21b and the third wall portion 21c. Furthermore, in this embodiment, the heating foam material 9 faces the longitudinal end 43E of the lower frame reinforcement member 43 and is large enough to cover almost the entirety of it.

[0043] In the fire protection opening and closing device 1 of this embodiment, the heated foam material 9 expands in the event of a fire and blocks the space S where no frame reinforcement material is provided, thereby preventing flames from penetrating inside and outside the building through the space S.

[0044] Fig. 6 is an enlarged view of the lower frame 4 and the tightening mechanism 12, showing the state in which the tightening mechanism 12, described below, is locked to the lower frame 4, and Fig. 7 is an enlarged view of the lower frame 4 and the tightening mechanism 12, showing the state in which the tightening mechanism 12 is released from the locking of the lower frame 4. As shown in these figures, the lower frame 4 of this embodiment has grooves 47 formed on the side surface 45a of the indoor-side side portion 45 and the side surface 46a of the outdoor-side side portion 46. The grooves 47 on the side surface 45a of the indoor-side side portion 45 lock with latch members 14 of the tightening mechanism 12, described below, which are attached to the bottom frame 11 of the screen 5 to maintain the closed state of the screen 5. That is, in this embodiment, the grooves 47 formed on the side surface 45a of the indoor-side side portion 45 constitute the locked portions.

[0045] The fire opening and closing device 1 of this embodiment also has a heating foam material 9 as a heating foam material (not shown) on the indoor / outdoor side of the lower frame in the groove portion 47. Specifically, in this embodiment, the heating foam material 9 is fixed inside the groove portion 47 to both sides of the lower frame longitudinal end portion 4E via an adhesive, double-sided tape, or the like.

[0046] 6 and 7, the lower frame 4 of this embodiment has a curved chamfered portion 48 formed between the upper surface 44a and the indoor side surface 45a, more specifically, continuing above the groove portion 47. In this embodiment, a chamfered portion 48 is also formed between the upper surface 44a and the outdoor side surface 46a.

[0047] As described above, the fire opening and closing device 1 of this embodiment has the heated foaming material 9 between the bottom frame 4 and the inner surface of the second wall portion 21b and the inner surface of the third wall portion 21c of the right guide frame 2 (and the left guide frame 3), i.e., between the bottom frame 4 and the outdoor-side inner surface and the indoor-side inner surface of the right guide frame 2 (and the left guide frame 3). In other words, in this embodiment, the heated foaming material 9 is concealed by the right guide frame 2 (and the left guide frame 3), so it does not impair the aesthetic appeal of the opening and closing device. Furthermore, in the event of a fire, the surface temperatures of not only the bottom frame 4 but also the right guide frame 2 (and the left guide frame 3) are sensed. Therefore, even if the surface temperature of one of the bottom frame 4 and the right guide frame 2 (and the left guide frame 3) does not rise, foaming can occur due to an increase in the surface temperature of the other.

[0048] In the fire protection opening and closing device 1 of this embodiment, in the event of a fire, the heated foam material 9 expands and blocks the gap between the outdoor-side inner surface and the indoor-side inner surface of the lower frame 4 and the right guide frame 2 (and left guide frame 3), thereby preventing flames from penetrating from the indoors to the outdoors through the gap between the lower frame 4 and the outdoor-side inner surface and the indoor-side inner surface of the right guide frame 2 (and left guide frame 3).

[0049] On the back surface 41a, a pair of outdoor-side protruding wall portions 41e having bent portions 41f at their tips are formed, forming an outdoor-side storage portion 41g, similar to the first wall portion 21a of the right guide frame 2. Also, on the back surface 41a, a pair of indoor-side protruding wall portions 41h having bent portions 41i at their tips are formed, forming an indoor-side storage portion 41j.

[0050] The outdoor-side accommodating section 41g accommodates the heat-foaming material 9 as the lower-frame-opening-side heat-foaming material 9d along both ends thereof, similar to the outdoor-side accommodating section 21g of the right guide frame 2. The back surface 41a of the lower frame 4 is fixed to the inner circumferential surface 7a, and the outdoor-side accommodating section 41g is closed by the inner circumferential surface 7a, so that the heat-foaming material 9 is accommodated between the inner circumferential surface 7a and the outdoor-side accommodating section 41g. Therefore, even if the heat-foaming material 9 peels off from the outdoor-side accommodating section 41g due to deterioration of the adhesive or the like over time or due to melting of the adhesive (at approximately 120°C) before the heat-foaming material 9 starts to expand (at approximately 200°C), its attachment position is maintained, and loss of the function of the heat-foaming material 9 is suppressed.

[0051] The indoor-side storage section 41j stores a gap concealing material 10, similar to the indoor-side storage section 21j of the right guide frame 2. The gap concealing material 10 prevents light from leaking from the outdoors due to a gap that occurs between the inner circumferential surface 7a and the back surface 41a.

[0052] In this embodiment, the heated foaming materials 9 are arranged in the outdoor-side storage section 21g of the right guide frame 2 (and the left guide frame 3) and the outdoor-side storage section 41g of the lower frame 4, but the position, range, and number of the heated foaming materials 9 are not limited as long as they are on the opening 7 (inner peripheral surface 7a) side, and they may be arranged, for example, in the indoor-side storage section 21j and the indoor-side storage section 41j, or may be arranged in both the outdoor-side storage section 21g and the outdoor-side storage section 41g and the indoor-side storage section 21j and the indoor-side storage section 41j. The heated foaming materials 9 may also be arranged in the centers of the first wall section 21a and the back surface 41a.

[0053] The screen 5 is fireproof and made of glass cloth, silica cloth, or one of these cloths coated with or impregnated with fire-resistant paint. As shown in Figure 3, a pair of vertical edges 5a of the screen 5 are formed with retaining portions 51 made of threads made of a non-combustible material. The retaining portions 51 are located inside the inner guide portion 22. The retaining portions 51 prevent the vertical edges 5a from slipping out of the slits 22a of the inner guide portion 22 when the screen 5 is subjected to a bending force.

[0054] The thread made of a non-combustible material that makes up retaining portion 51 can be, for example, stainless steel thread, and in this embodiment, retaining portion 51 is made of stainless steel thread. The diameter of the thread that can be used can be, for example, 0.35 mm to 1.06 mm, and retaining portion 51 in this embodiment is made of stainless steel thread with a thickness of 0.35 mm. In particular, in this embodiment, retaining portion 51 is made into a substantially spherical shape by sewing stainless steel thread multiple times along vertical side 5a, and is formed to a thickness that does not allow it to pass through slit 22a.

[0055] In this embodiment, retaining auxiliary portions 52 made of a noncombustible material are formed at the widthwise ends of the screen 5. In particular, in this embodiment, the retaining auxiliary portions 52 are formed at regular intervals in the height direction of the screen 5 (the longitudinal direction of the right guide frame 2 and the left guide frame 3) so as to overlap the retaining portions 51. For example, stapler needles can be used as such retaining auxiliary portions 52. In this embodiment, stainless steel stapler needles with a diameter of 0.5 mm, a foot length of 6.0 mm, and a width of 11.6 mm are used. Besides stainless steel, other materials that can be used for the stapler needles include steel, aluminum, copper, and the like. The material of the stapler needles may be the same as or different from the material of the noncombustible thread that constitutes the retaining portions 51.

[0056] The screen 5 of this embodiment is provided with a metal plate 53 made of a non-combustible material at its lower end. Specifically, the screen 5 of this embodiment has the aluminum plate 53 formed along the lower end 5b of the screen 5, across the entire width of the screen 5. The aluminum plate 53 is attached to the screen 5 with double-sided tape.

[0057] The screen 5 of this embodiment is also provided with a retaining portion 51 made of threads made of a non-combustible material at the lower end portion. Specifically, the retaining portion 51 made of threads made of a non-combustible material is provided along the lower end of the plate 53 made of a non-combustible material.

[0058] FIG. 4 is an enlarged view of the bottom frame 11. As shown in FIGS. 1 and 4, the bottom frame 11 is attached to the screen 5 of this embodiment over the entire lower end so as to cover the entire lower end. The bottom frame 11 can be, for example, an aluminum molded product. In this embodiment, the bottom frame 11 is screwed to the screen 5 using an aluminum plate 53 as a seat. In particular, in this embodiment, the bottom frame 11 is composed of an indoor-side member 111 and an outdoor-side member 112. After the screen 5 is screwed to the outdoor-side member 112 with the lower end of the screen 5 sandwiched between them using the aluminum plate 53 as a seat, the indoor-side member 111 is fitted and screwed to the outdoor-side member 112. Therefore, the bottom frame 11 is attached so that the aluminum plate 53 and the retaining portion 51 provided at the lower end are entirely covered by the bottom frame 11.

[0059] The indoor-side member 111 constituting the bottom frame 11 attached to the screen 5 has an opening 111a formed on the indoor-side surface and a storage section 111b that stores a mounting section 131 of the base member 13 (described later) formed over the entire longitudinal direction. The storage section 111b is formed to communicate with the opening 111a. In this embodiment, the base member 13 is provided at the lower end of the screen 5 by storing the mounting section 131 of the base member 13 in the storage section 111b.

[0060] The opening and closing device 1 of this embodiment includes a base member 13 provided at the lower end of the screen 5, and a tightening mechanism 12 for the screen 5, which includes a latch member 14 rotatably provided on the base member 13. Figures 8A to 8E are a plan view, a front view, a right side view, a left side view, and a bottom view of the base member 13, respectively. The base member 13 can be made of, for example, aluminum die-cast, and includes an attachment portion 131 accommodated in the accommodation portion 111b of the indoor-side member 111, a connecting portion 132 to which the latch member 14, which together with the base member 13 constitutes the tightening mechanism 12, is connected, and an operating portion 133 that is operated when moving the screen 5 up and down from any vertical position. The longitudinal dimension of the base member 13 (the left-right direction in the opening and closing device) can be any length as long as the base member 13 can be attached to the screen 5 (in this embodiment, the indoor-side member 111). In the base member 13 of this embodiment, the longitudinal dimensions of all parts constituting the base member 13 are shorter than those of the indoor side member 111 .

[0061] The base member 13 can be attached to the indoor-side member 111 by inserting the attachment portion 131 from the longitudinal end of the accommodation portion 111b. In this embodiment, the attachment portion 131 and the accommodation portion 111b are configured so that a small gap is formed between the attachment portion 131 and the accommodation portion 111b when the attachment portion 131 is accommodated in the accommodation portion 111b. With this configuration, the attachment portion 131 inserted from the longitudinal end of the accommodation portion 111b can slide longitudinally within the accommodation portion 111b. Therefore, in this embodiment, the indoor-side member 111 can easily move to the fixed position of the base member 13 in the longitudinal direction.

[0062] A screw hole 131a is formed on each of both longitudinal ends of the lower end of the mounting portion 131. The base member 13 is fixed to a position in the longitudinal direction of the indoor side member 111 by being screwed into a screw hole (not shown) formed in the indoor side member 111 via the screw hole 131a. The fixing position of the base member 13 in the longitudinal direction of the indoor side member 111 can be changed to any position by changing the position of the screw hole formed in the indoor side member 111. In this embodiment, the base member 13 is fixed to the center of the indoor side member 111 in the longitudinal direction.

[0063] The connecting portion 132 to which the latch member 14 is connected has a generally cylindrical shape. The connecting portion 132 has threaded holes 132a formed on both longitudinal end side surfaces thereof for screwing the latch member 14. The connecting portion 132 of this embodiment is configured so that both longitudinal ends are positioned longitudinally inward relative to the diameter of the threaded holes 131a formed in the mounting portion 131. This configuration prevents the connecting portion 132 from interfering with the screwing of the mounting portion 131, while also preventing the vertical dimension of the mounting portion 131, i.e., the vertical dimension of the base member 13, from increasing.

[0064] The coupling portion 132 of this embodiment is connected to (formed continuously with) the attachment portion 131 via a connecting portion 134. The connecting portion 134 is configured so that both ends in the longitudinal direction are flush with both ends of the attachment portion 131.

[0065] The base member 13 of this embodiment has a notched cylindrical portion 135 between the coupling portion 132 and the connection portion 134. The notched cylindrical portion 135 has a shape obtained by cutting out a cylinder that is concentric with the column of the coupling portion 132, and is configured so that both ends in the longitudinal direction are flush with both ends of the coupling portion 132. In addition, arc-shaped recesses 134a are formed in the connecting portion 134 between both longitudinal ends and both longitudinal ends of the coupling portion 132. In this embodiment, the arc surface of the recesses 134a and the outer arc surface of the cutout cylindrical portion 135 are configured by the arc surface of the same circle.

[0066] The operating unit 133 of this embodiment is configured so that both longitudinal ends are located outward of both longitudinal ends of the mounting unit 131 and the connecting unit 134. The upper surface 133a of the operating unit 133 abuts against the lower surface of the storage box 6 when the screen 5 is wound onto the drum 62 (described later) and the bottom frame 11 moves upward, thereby also functioning as an abutment surface that determines the position of the uppermost part of the bottom frame 11. In addition, a plate-shaped portion 136 extending upward from the upper end of the indoor-side connecting unit 134 is connected to the lower surface 133b of the operating unit 133. The plate-shaped portion 136 is configured so that both longitudinal ends are flush with both ends of the mounting unit 131 and the connecting unit 134.

[0067] 9(A) to 9(E) are respectively a plan view, a front view, a right side view, a left side view, and a bottom view of the latch member 14. The latch member 14 of this embodiment can be made of, for example, aluminum die-cast, and includes a connecting portion 141 that is connected to the base member 13, a locking portion 142 that is locked in the groove portion 47, and a lever portion 143.

[0068] The connecting portion 141 of this embodiment has a notched cylindrical shape with an opening 141b along the longitudinal direction of the cylinder having a hollow portion 141a formed throughout the entire longitudinal direction, and is configured so that its longitudinal dimension is the same as the longitudinal dimensions of the mounting portion 131, connecting portion 134 and plate-shaped portion 136 of the base member 13.

[0069] The hollow portion 141a accommodates the connecting portion 132 of the base member 13. The hollow portion 141a of this embodiment is configured so that a small gap is created between the connecting portion 132 and the hollow portion 141a when the connecting portion 132 of the base member 13 is accommodated therein.

[0070] The opening 141b of the connecting portion 141 is configured so that its dimension in a plane perpendicular to the longitudinal direction of the connecting portion 141 is larger than the distance between both ends of the part where the connecting portion 132 is connected to the cutout cylindrical portion 135 in a plane perpendicular to the longitudinal direction of the base member 13 (the distance between both ends of the inner arc surface of the cutout cylindrical portion 135), and smaller than the diameter of the connecting portion 132.

[0071] In this embodiment, as shown in FIG. 11, the latch member 14 can be provided on the base member 13 by inserting the connecting portion 132 from the longitudinal end of the hollow portion 141a while the cutout cylindrical portion 135 of the base member 13 is positioned within the opening range of the opening 141b of the connecting portion 141.

[0072] In particular, in this embodiment, since the connecting portion 141 is configured as described above, the latch member 14 can rotate relative to the base member 13 with the connecting portion 132 of the base member 13 as the rotation axis between a state in which one end 141c of the notched cylindrical shape of the connecting portion 141 contacts the notched tubular portion 135 of the base member 13 shown in Fig. 6 and a state in which the other end 141d of the notched cylindrical shape of the connecting portion 141 contacts the notched tubular portion 135 of the base member 13 shown in Fig. 7. In addition, the connecting portion 132 is screwed, as described below, to prevent the connecting portion 132 from slipping out of the opening 141b, thereby preventing the latch member 14 from falling off the base member 13.

[0073] In the connecting portion 141 of this embodiment, notched cylindrical recesses 141f are formed on an inner circumferential surface 141e that constitutes the hollow portion 141a, from both longitudinal ends. The notched cylindrical recesses 141f are formed over the entire inner circumferential surface 141e in a plane perpendicular to the longitudinal direction of the latch member 14. The dimension of each notched cylindrical recess 141f in the longitudinal direction of the latch member 14 is formed to be equal to the distance between one end of the mounting portion 131 and one end of the connecting portion 132 of the base member 13 in the longitudinal direction of the base member 13. Therefore, the distance between the two notched cylindrical recesses 141f is equal to the length of the connecting portion 132 in the longitudinal direction.

[0074] By forming such a cutout cylindrical recess 141f, a step 141g is formed on the inner circumferential surface 141e. This step 141g is flush with both longitudinal ends of the connecting portion 132 when the latch member 14 is attached to the base member 13. In particular, in this embodiment, the cutout cylindrical recess 141f is formed so that the thickness h of the step 141g is the same as the thickness H of the cutout cylindrical portion 135 of the base member 13.

[0075] 11, in this embodiment, the notched cylindrical portion 135 and the step portion 141g have outer arc surfaces formed by the arc surfaces of the same circle, and the inner arc surfaces formed by the arc surfaces of approximately the same circle, and are positioned on approximately the same annulus. Therefore, in this embodiment, the notched cylindrical portion 135, the step portion 141g, and the connecting portion 132 serve as seats, and the latch member 14 is screwed to the base member 13 using the screw holes 132a from both longitudinal sides.

[0076] In this embodiment, the locking portion 142 is connected to the connecting portion 141 by a plate-shaped portion 144. When one end 141c of the notched cylindrical shape of the connecting portion 141 shown in Fig. 6 is in contact with the notched cylindrical portion 135 of the base member 13, the locking portion 142 is locked in the groove portion 47 of the lower frame 4. When the other end 141d of the notched cylindrical shape of the connecting portion 141 shown in Fig. 7 is in contact with the notched cylindrical portion 135 of the base member 13, the locking portion 142 is located outside the groove portion 47 and is not locked in the groove portion 47.

[0077] Lever portion 143 extends in a direction away from the rotation axis direction of latch member 14, and in this embodiment, is formed on the outer periphery of connecting portion 141. In this specification, lever portion 143 extending in a direction away from the rotation axis direction means that, in a cross section perpendicular to the rotation axis direction, the lever portion has a portion that is farther from the rotation axis than one end of lever portion 143 on the rotation axis side. In this embodiment, lever portion 143 is formed so that the angle it forms with plate-shaped portion 144 is 90 degrees or more and less than 180 degrees in a plane perpendicular to the longitudinal direction of latch member 14. Furthermore, the indoor end of lever portion 143 is formed in a cylindrical shape, and both longitudinal ends of lever portion 143 are configured to be located longitudinally outward of both longitudinal ends of plate-shaped portion 144.

[0078] As shown in Figure 1, the storage box 6 is made up of a main body 60 and a base material 61 as a storage box reinforcement material to which the main body 60 is attached. The main body 60 houses a drum 62 to which the base end edge of the screen 5 is attached. The drum 62 winds up and unwinds the screen 5 and is equipped with a mechanism that can temporarily stop the drum at any vertical position along the way.

[0079] The base material 61 is made of steel and is thick, so that the rigidity of the storage box 6 is increased.

[0080] In consideration of the possibility of a gap forming between the box 6 and the inner peripheral surface 7a in the event of a fire, a storage section may be formed where the main body 60 contacts the inner peripheral surface 7a, and a heating foam material may be placed inside the storage section.

[0081] The opening and closing device 1 of this embodiment is provided with a screen release component 15 that releases the closed state of the screen tightening mechanism 12. Specifically, the opening and closing device 1 of this embodiment is provided with a screen release component 15 that releases the closed state of the screen tightening mechanism 12 by releasing the engagement between the screen tightening mechanism 12 and a groove portion 47 that serves as an engaged portion to which the tightening mechanism 12 is engaged when the screen 5 is in the closed state.

[0082] 12(A) to 12(E) are a plan view, a front view, a right side view, a left side view, and a bottom view, respectively, of the release part 15 of this embodiment, and FIGS. 13(A) and 13(B) are perspective views of the release part 15 of this embodiment. The release part 15 of this embodiment includes an attachment part 151 that attaches the release part 15 to the lower end of the screen 5, an operation part 152 that is operated when moving the release part 15, and a release part 153 that releases the closed state of the tightening mechanism 12. The release part 15 of this embodiment is made of stainless steel, steel, or the like, and the attachment part 151, operation part 152, and release part 153 are integrally formed.

[0083] The mounting portion 151 of this embodiment is composed of a bottom portion 151A, an indoor-side side surface portion 151B, and an outdoor-side side surface portion 151C. In this embodiment, the indoor-side side surface portion 151B and the outdoor-side side surface portion 151C are configured so that the distance between the indoor-side side surface portion 151B and the outdoor-side side surface portion 151C is smaller than the indoor-outdoor dimension of the bottom frame 11. Therefore, by press-fitting the bottom frame 11 between the indoor-side side surface portion 151B and the outdoor-side side surface portion 151C, the release component 15 can be attached to the lower end portion of the screen 5 to which the bottom frame 11 is attached.

[0084] The operating unit 152 of this embodiment includes a top surface portion 152A having one end connected to the upper end of the outdoor side surface portion 151C, a side surface portion 152B extending from the other end of the top surface portion 152A toward the lower frame 4, a bottom surface portion 152C extending from the lower end of the side surface portion 152B toward the outdoor side surface portion 151C, and pressing portions 152D connected to the top surface portion 152A at both ends of the operating unit 152. In this embodiment, the operating unit 152 is formed in a box shape, and by pressing the pressing portion 152D, the release part 15 can be moved with a small force along the longitudinal direction of the lower end of the screen 5.

[0085] The release section 153 of this embodiment includes a top surface section 153A, one end of which is connected to the upper end of the indoor side surface section 151B, and a side surface section 153B, which extends from the other end of the top surface section 153A toward the lower frame 4. In particular, the release section 153 of this embodiment includes inclined surface sections 153C, which are inclined toward the indoor side surface section 151B, at both left and right ends of the side surface section 153B in the opening / closing device. Note that the left and right ends of the bottom side (lower frame 4 side) of the inclined surface section 153C are close to the chamfered section 48 of the lower frame 4. Even if the inclined surface section 153C comes into contact with the chamfered section 48 due to the inner surface 7a of the opening or the installation state of the components, the resistance is kept small because it is point contact with the curved surface, and the release part 15 can be moved smoothly along the longitudinal direction of the lower end of the screen 5.

[0086] The release component 15 is in a non-release position that does not release the closed state of the screen 5 by the tightening mechanism 12 when it is not necessary to release the closed state of the screen 5 by the tightening mechanism 12. In this embodiment, the tightening mechanism 12 is provided in the center of the opening and closing device 1 in the left-right direction, and therefore the release component 15 is fixed to one end of the opening and closing device 1 in the left-right direction by a fixing sticker. The fixing sticker can be affixed, for example, to straddle the top surface 152A of the operating unit 152 of the release component 15 and the outdoor-side member 112 of the bottom frame 10. The sticker may include instructions to break the sticker and move the release component 15 to the release position when it is necessary to release the closed state of the screen 5.

[0087] The release part 15 of this embodiment releases the closed state of the tightening mechanism 12 by moving from a non-release position, which does not release the closed state of the tightening mechanism 12, to a release position, which releases the closed state of the tightening mechanism 12. In this embodiment, the release position is indicated by a sticker serving as an indicator member. This sticker serving as an indicator member is affixed to the outdoor-side member 112, and it is described that the closed state of the tightening mechanism 12 is released by moving the release part 15 to the position corresponding to the sticker.

[0088] 14 to 16 are reference diagrams showing the use state of the fire opening and closing device of this embodiment. When the release element 15 of this embodiment moves to the release position, it disengages the screen's tightening mechanism 12 from the groove 47, which serves as the locked portion to which the tightening mechanism 12 is locked when the screen 5 is closed, thereby releasing the closed state of the screen tightening mechanism 12. Specifically, in this embodiment, the top surface 153A of the release element 153 is configured so that the indoor-side end of the top surface 153A is located closer to the indoor side than the indoor-side end of the latch member 14 in the closed state. Therefore, when the release element 15 moves to the release position, the release element 153 is inserted between the latch member 14 and the bottom frame 11. In particular, because the release element 153 of this embodiment includes the inclined surface 153C, the release element 15 can be smoothly moved to the release position without being hindered from inserting the release element 153 between the latch member 14 and the bottom frame 11. When the release part 15 has completed moving to the release position, the indoor end of the top surface 153A of the release part 153 is positioned closer to the indoor side than the indoor end of the latch member 14 in the closed state, so that the latch member 14 is rotated in a direction in which the engaging portion 142 of the latch member 14 disengages from the groove portion 47 as the engaged portion, thereby releasing the engagement and releasing the closed state.

[0089] The fire opening and closing device 1 of this embodiment is provided with a screen tightening mechanism 12 including a base member 13 provided at the lower end of the screen 5 and a latch member 14 rotatably provided on the base member 13, and this latch member 14 is formed with a lever portion 143 extending in a direction away from the rotation axis direction of the latch member 14. Therefore, the weight of the lever portion 143 urges the latch member 14 into the groove portion 47 serving as a locked portion with which the locking portion 142 of the latch member 14 is locked. In addition, a bottom frame reinforcement member 43 provided on the bottom frame 4 suppresses deformation of the bottom frame 4 (locked portion) in the event of a fire, thereby maintaining the lock of the latch member.

[0090] Furthermore, the right guide frame 2 (and left guide frame 3) has guide frame reinforcement 23 provided on the inner periphery of the outer guide section 21, and the inner guide section 22 that houses the vertical side of the screen 5 is housed inside the outer guide section 21 so that a clearance is formed around all of its side surfaces. Therefore, in the event of a fire, the guide frame reinforcement 23 suppresses deformation of the right guide frame 2 (and left guide frame 3), and the clearance formed around the inner guide section 22 also suppresses deformation of the inner guide section 22 due to high temperatures, etc., so that the vertical side of the screen 5 will not come out of the right guide frame 2 (and left guide frame 3).

[0091] Furthermore, at the joint between the right guide frame 2 (and left guide frame 3) and the bottom frame 4, a space S is provided where neither the guide frame reinforcement 23 nor the bottom frame reinforcement 43 is provided, to absorb thermal expansion of the frame reinforcement. This prevents the guide frame reinforcement 23 and the bottom frame reinforcement 43 from thermally expanding and coming into contact with each other in the event of a fire, suppressing deformation of the right guide frame 2 (and left guide frame 3) and the bottom frame 4 due to thermal expansion of the frame reinforcement. Furthermore, a heating foam material 9 is disposed in the space S, and in the event of a fire, the heating foam material 9 expands to close the space S where no frame reinforcement is provided. This prevents the screen 5 of the opening and closing device 1 from being lifted up and releasing the closed state, thereby preventing flames from penetrating inside and outside in the event of a fire, thereby providing sufficient fire protection performance. Furthermore, privacy can be adequately protected in normal times.

[0092] In the above embodiment, the lower frame 4 has a chamfered portion 48 between the upper surface 44a and the indoor-side side surface 45a. With this configuration, when the screen 5 is closed, the locking portion 142 that abuts against the lower frame 4 can move along the chamfered portion 48 into the groove portion 47 formed in the indoor-side side surface 45. Therefore, the movement of the locking portion 142 is not hindered by contact with the upper surface 44a of the lower frame 4. Therefore, the locking portion 142 can be easily locked into the groove portion 47, which serves as the locked portion, by simply biasing the operating portion 133 downward to close the screen 5. Note that when the screen 5 is in any vertical position or when the bottom frame 11 is at the top and the operating portion 133 is abutting against the underside of the storage box 6, the screen 5 can also be closed by holding the lever portion 143.

[0093] Furthermore, when storing the screen 5 in the storage box 6, the lock can be released and the screen can be stored to a certain extent simply by lifting (rotating) the lever portion 143 upward, making the operation of storing the screen 5 simple.

[0094] Furthermore, in the above embodiment, the screen release component 15 that releases the closed state of the screen tightening mechanism 12 is provided, and the closed state of the screen tightening mechanism 12 can be released by releasing the engagement between the screen tightening mechanism 12 and the locked portion to which the tightening mechanism 12 is locked when the screen is in the closed state. Therefore, while the closed state can be reliably maintained in situations where release of the closed state of the screen tightening mechanism 12 is not intended, the closed state can be easily released even from the indoor side when release of the closed state is intended. Therefore, even if release of the closed state of the screen is required, for example, during a fire drill, the opening and closing device can be easily returned to the released closed state it was in before the drill without damaging the opening and closing device.

[0095] In particular, the release part 15 of the screen of this embodiment does not require other members (such as the bottom frame 11) to be penetrated in order to be attached. Therefore, no gaps are created by penetrating other members. This means that the release part 15 can be attached without creating gaps through which flames can pass. In other words, the release part 15 can be attached without reducing fire protection performance.

[0096] In the above embodiment, the release part 15 is attached to the lower end of the screen 5. Therefore, there is no need to provide a separate installation location for the release part 15, and the release part 15 can be prevented from being lost.

[0097] In the above embodiment, the release part 15 includes an attachment part 151 that attaches the release part 15 to the lower end of the screen 5, an operation part 152 that is operated when moving the release part 15, and a release part 153 that releases the closed state of the tightening mechanism 15. Therefore, with a simple configuration, it is possible to achieve attachment to the lower end of the screen 5, movement of the release part 15, and release from the closed state.

[0098] In the above embodiment, the closed state of the tightening mechanism 12 is released by moving the release part 15 from a non-release position that does not release the closed state of the tightening mechanism 12 to a release position that releases the closed state of the tightening mechanism 12. Therefore, the closed state of the tightening mechanism 12 can be released with a simple operation.

[0099] The above embodiment further includes an indicator member that indicates the release position. Therefore, when the user intends to release the closed state by the screen tightening mechanism 12, it is possible to prevent the release part 15 from being moved to an incorrect position, thereby ensuring that the closed state can be released.

[0100] In the above embodiment, the release part 15 is fixed in the non-release position, which can reliably prevent the screen from being released from the closed state by the tightening mechanism 12 in a situation where the release is not intended.

[0101] In the above embodiment, the notched cylindrical portion 135, the step portion 141g, and the connecting portion 132 are used as a seat to screw the latch member 14 to the base member 13. Also, in order to position the seat formed by the notched cylindrical portion 135, the step portion 141g, and the connecting portion 132 more inward than the longitudinal ends of the hollow portion 141a, notched cylindrical recesses 141f are provided on both longitudinal ends of the latch member 14. With this configuration, there is no need to use a separate member as a seat, and the presence of the screws is made less visible.

[0102] In the fire opening and closing device 1 of this embodiment, the widthwise ends of the screen 5 are formed with stopper portions 51 made of threads made of a noncombustible material. Therefore, even if the stopper portions 51 are provided to prevent the sheet-like screen 5 from coming off the right guide frame 2 and the left guide frame 3, and even if the stopper portions 51 overlap radially on the widthwise end sides of the screen 5 in a rolled-up state, it is possible to prevent the winding diameter on the widthwise end sides from increasing. Therefore, the fire opening and closing device 1 of the above embodiment can prevent an increase in the size of the storage box 6, restrictions on the installation location, and deterioration in the aesthetic appearance of the opening of a building, while also preventing a decrease in the operability of the fire opening and closing device.

[0103] Furthermore, in the fire opening and closing device 1 of this embodiment, a metal plate 53 made of a non-combustible material is provided at the lower end of the screen 5. Such a plate 53 made of a non-combustible material not only functions to protect the lower end of the screen 5 from fire, but also can be used as a seat when screwing the bottom frame 11 to the screen 5. Therefore, the fire opening and closing device 1 of the above embodiment can simultaneously achieve an improvement in the fire protection function and a simplification of the mounting structure for mounting the bottom frame 11 to the screen 5.

[0104] Furthermore, in the fire opening and closing device 1 of this embodiment, a retaining portion 51 made of threads made of a non-combustible material is formed at the lower end of the screen 5. This prevents the lower end of the sheet-like screen 5 from coming off the bottom frame 11.

[0105] Furthermore, in the fire protection opening and closing device 1 of this embodiment, a slip-out prevention auxiliary section 52 made of a non-combustible material is formed at the widthwise end of the screen 5, so that even if the right guide frame 2 and the left guide frame 3 are deformed during a fire or a large force is applied to the screen 5, such as a child pushing hard on the screen 5 under normal circumstances, the sheet-like screen 5 can be prevented from slipping out of the right guide frame 2 and the left guide frame 3.

[0106] In the above embodiment, a stapler is used as the removal prevention auxiliary part 52, but the removal prevention auxiliary part 52 is not limited to a stapler as long as it is possible to prevent the screen 5 from coming out even when a large force is applied, and further, if it is possible to prevent the screen 5 from coming out without providing the removal prevention auxiliary part 52, it is not necessary to provide the removal prevention auxiliary part 52.

[0107] In the above embodiment, only the anti-slip portion 51 made of thread made of non-combustible material is formed as the anti-slip portion 51, but as long as the effects of the present invention are achieved, an anti-slip portion other than the anti-slip portion made of thread made of non-combustible material may be formed.

[0108] In the above embodiment, the heated foam material 9 as the guide frame lower end side heated foam material 9a is provided at the end of the first wall portion 21a on the lower frame 4 side, but the heated foam material 9 can be provided at any member or position as long as it is in a space where the longitudinal end portion 43E of the lower frame reinforcement material 43 and the longitudinal end portion 23E of the guide frame reinforcement material 23 face each other.

[0109] In the above embodiment, the heating foam material 9 as the heating foam material on the indoor / outdoor side of the lower frame is provided in the groove portion 47 of the lower frame 4, but the heating foam material 9 can be attached to any member or position between the lower frame and the outdoor inner surface and / or indoor inner surface of the left and right guide frames.

[0110] The present invention is not limited to the above-described embodiment, and many modifications can be made by a person having ordinary skill in the art within the technical concept of the present invention. For example, in the above embodiment, the locking portion is locked to the groove portion of the lower frame, but it may be locked to another part of the lower frame, or a locked portion may be provided on the building. [Industrial Applicability]

[0111] According to the present invention, it is possible to provide an opening and closing device that uses a screen tightening mechanism to prevent the screen of the opening and closing device from being flipped up and releasing the closed state during fires and during normal times, and that is equipped with a release part that can easily release the closed state of the screen tightening mechanism from the outside when necessary. [Explanation of symbols]

[0112] 1: Switchgear 2: Right guide frame 21: Outer guide part 21a: First wall portion 21b: Second wall portion 21c: Third wall portion 21d: a pair of fourth wall portions; 21e: a pair of outdoor-side protruding wall portions 21f: Bending section 21g: Outdoor storage section 21h: A pair of indoor protruding wall portions 21i: Bent portion 21j: Indoor storage section 21k: Pair of protruding wall sections 21l: Opening 21m: Pair of protrusions 22: Inner guide part 22a: Slit 23: Guide frame reinforcement 3: Left guide frame 4: Bottom frame 4E: Longitudinal end 41: Bottom 41a: rear surface; 41e: pair of outdoor protruding wall portions 41f: Bending section 41g: Outdoor storage section 41h: A pair of indoor protruding wall sections 41i: Bent section 41j: Indoor storage area 42: Recess 43: Lower frame reinforcement 43a: bottom portion 43b: pair of upright portions 43c: A pair of bent parts 43E: Longitudinal end 44: Upper 44a:Top surface 45: Indoor side 45a: Side 46: Outdoor side 46a: Side 47: Groove (locked part) 48: Chamfered part 5: Screen 5a: Vertical side 5b: Bottom edge 51: Retaining portion 52: Retaining auxiliary portion 53: Plate 6: Storage box 60: Main body 61: Base material 62: Drum 7: Opening 7a: Inner surface 8: Picture frame 9: Heat foam material 9a: Heat-foamed material on the lower end of the guide frame 9b: Heat-foamed material on the opening side of the reinforcing material 9c: Heating foam material on the opening side of the guide frame 9d: Heating foam material on the opening side of the lower frame 10: Gap hiding material 11: Bottom frame 111: Indoor side parts 111a: Opening 111b: Storage section 112: Outdoor component 12:Tightening mechanism 13: Base material 131: Mounting part 131a: screw hole 132:Connection part 132a: screw hole 133:Operation unit 133a:Top surface 133b: Bottom surface 134: Connection 134a recess 135: Notched cylindrical part 136: Plate-shaped part 14: Latch member 141:Connection part 141a: Hollow part 141b: Opening part 141c: One end 141d: other end 141e: inner peripheral surface 141f: Notched cylindrical recess 141g: Stepped portion 142: Locking part 143: Lever part 15: Release parts 151: Mounting part 151A: Bottom 151B: Indoor side side 151C: Outdoor side side part 152:Operation unit 152A: Top section 152B: Side section 152C: Bottom section 152D: Pressing part 153: Liberation Department 153A: Top section 153B: Side section 153C: Slope section H: Thickness h: thickness

Claims

1. a screen whose widthwise ends are surrounded by a left guide frame and a right guide frame and which is wound up and unwound along the left guide frame and the right guide frame; a screen tightening mechanism provided at the lower end of the screen; a screen release component that releases the closed state of the tightening mechanism, the release element is attached to a lower end of the screen; An opening and closing device characterized in that the release part is attached to the lower end of the screen so as to be movable in the longitudinal direction.

2. The opening and closing device according to claim 1, characterized in that the release component of the screen releases the closed state of the screen tightening mechanism by releasing the engagement between the tightening mechanism of the screen and the locked portion to which the tightening mechanism is locked when the screen is in the closed state.

3. The opening and closing device according to claim 1 or 2, characterized in that the release part comprises an attachment part for attaching the release part to the lower end part of the screen, an operating part that is operated when the release part moves, and a release part that releases the closed state by the tightening mechanism.

4. The opening and closing device according to claim 3, wherein the release component releases the closed state of the tightening mechanism by moving the release component from a non-release position that does not release the closed state of the tightening mechanism to a release position that releases the closed state of the tightening mechanism.

5. The opening and closing device according to claim 4, further comprising an indicator member that indicates the release position.

6. The opening and closing device according to claim 4, wherein the release part is fixed in the non-release position.

Images