Fireproof opening and closing device

Abstract

To provide an opening / closing device for fire prevention capable of exerting stable fire prevention performance even with a pressure fluctuation occurring in a fire breakout.SOLUTION: In an opening / closing device for fire prevention comprising a left guide frame and a right guide frame and a screen having an end in a width direction enclosed by the left guide frame and the right guide frame and wound and unwound along the left guide frame and the right guide frame, a heating foam material and a fire-resistant cushioning material are provided inside of the left guide frame and the right guide frame, respectively.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a switchgear, and more particularly to a fire protection switchgear 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. 2017-096027 discloses a fire prevention opening and closing device that includes left and right guide frames and a lower frame, a sheet-like opening and closing body (screen) that is wound and unwound along the left and right guide frames, a winding device that winds up the opening and closing body, and frame reinforcement materials that support the left and right guide frames and the lower frame, respectively.

[0004] In recent years, in order to improve the fire resistance of such fire prevention opening and closing devices, the left and right guide frames and the inside of the lower frame are provided with a heat-expanding foam material, as described in Japanese Utility Model Laid-Open Publication No. 60-76942, which expands (foams) in the event of a fire to prevent the penetration of flames. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2017-096027 [Patent Document 2] Japanese Utility Model Application Publication No. 60-76942 Summary of the Invention [Problem to be solved by the invention]

[0006] In the event of a fire, heat generated by the fire causes pressure fluctuations around the fire opening and closing device. Therefore, in the fire opening and closing device described in Patent Document 1, the pressure fluctuations that occur during a fire can cause the screen to oscillate. When this screen oscillates, even if a heat-foaming material is provided inside the left and right guide frames, gaps can form between the foamed heat-foaming material and the screen, or between the foamed heat-foaming material and the left and right guide frames. Furthermore, if the screen oscillates significantly, gaps can form due to the detachment (collapse) of part of the foamed heat-foaming material. Therefore, there is a risk that flames can penetrate from the interior to the exterior through these gaps, and therefore, there is a need for further improvements in fire resistance and fire resistance.

[0007] The present invention has been made to solve such problems, and an object of the present invention is to provide a fire protection opening and closing device that can exhibit stable fire protection and resistance performance even against pressure fluctuations that occur when a fire breaks out. [Means for solving the problem]

[0008] In order to solve the above problems, the fire opening and closing device of the present invention includes a left guide frame, a right guide frame, a screen whose width direction end is surrounded by the left guide frame and the right guide frame, and which is wound up and unwound along the left guide frame and the right guide frame, and On either the indoor or outdoor side Heat-foaming materials and On the other side of the indoor and outdoor Flame-retardant buffer material is provided. The left guide frame and the right guide frame each include an outer guide portion and an inner guide portion, and the heat-foaming material and the flame-retardant buffer material are provided between the inner periphery of the outer guide portion and the outer periphery of the inner guide portion. It is characterized by the presence of

[0009] In the fire opening and closing device of the present invention, it is preferable that the heat-foaming material and the flame-retardant buffer material are provided along the longitudinal direction of the left guide frame and the right guide frame.

[0011] In the fire opening and closing device of the present invention, it is preferable that one of the heat-foaming material and the flame-retardant buffer material is provided on the inner periphery of the outer guide portion, and the other is provided on the outer periphery of the inner guide portion.

[0012] In the fire opening and closing device of the present invention, it is preferable that the heated foaming material is provided on the inner periphery of the outer guide portion, and the flame-retardant buffer material is provided on the outer periphery of the inner guide portion.

[0013] In the fire opening and closing device of the present invention, it is preferable that the heat-foaming material and the flame-retardant buffer material are provided on an outer periphery of the inner guide portion.

[0014] In the fire opening and closing device of the present invention, it is preferable that the heat-foaming material and the flame-retardant buffer material are provided on an inner periphery of the outer guide portion. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a fire opening and closing device that can exhibit stable fire protection and resistance even against pressure fluctuations that occur when a fire occurs. [Brief explanation of the drawings]

[0016] [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] Schematic diagram showing how the inner guide portion 22 is assembled into the outer guide portion 21. [Figure 7] Schematic diagram showing the foaming of the heat-foaming material [Figure 8] A cross-sectional view of a right guide frame of a fire opening and closing device according to a second embodiment. [Figure 9] A cross-sectional view of a right guide frame of a fire opening and closing device according to a third embodiment. [Figure 10] A cross-sectional view of a right guide frame of a fire opening and closing device according to a fourth embodiment. [Figure 11] A cross-sectional view of a right guide frame of a fire opening and closing device according to a fifth embodiment. [Figure 12] A cross-sectional view of a right guide frame of a fire opening and closing device according to a sixth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] In the opening / closing device 1 of this embodiment, a heat-foamed material and a flame-retardant buffer material are provided inside the left guide frame 3 and the right guide frame 2, respectively. Specifically, a heat-foamed material 9 serving as a reinforcement opening-side heat-foamed material 9b is provided on the indoor side of the guide frame reinforcement 23 of this embodiment, at least a portion of which faces the inner guide portion 22. Furthermore, a flame-retardant sponge material SP made of chloroprene is provided as a flame-retardant buffer material, at least a portion of which faces the outdoor side of the guide frame reinforcement 23. For example, GUMSPO (registered trademark) by Inoac Corporation can be used as such a flame-retardant sponge material made of chloroprene. For example, Fi-Block (registered trademark) by Sekisui Chemical Co., Ltd. can be used as the heat-foamed material 9.

[0030] In this embodiment, a flame-retardant sponge material SP made of chloroprene is used as the flame-retardant buffer material, but other materials such as silicone rubber and ethylene propylene diene rubber can also be used as the flame-retardant buffer material.

[0031] In this specification, the flame-retardant buffer material means a foam material having elasticity.

[0032] In this embodiment, the flame-retardant sponge material SP is fixed to the inner guide portion 22 via an adhesive, double-sided tape, or the like.

[0033] In this embodiment, the flame-retardant sponge material SP is provided along the longitudinal direction (vertical direction) of the inner guide portion 22. Therefore, the flame-retardant sponge material SP in this embodiment is provided along the longitudinal direction (vertical direction) of the left guide frame 3 and the right guide frame 2.

[0034] The flame-retardant sponge material SP, i.e., the flame-retardant cushioning material, is preferably provided over the entire longitudinal direction (vertical direction) of the left guide frame 3 and the right guide frame 2. In this embodiment, the flame-retardant sponge material SP is provided over the entire longitudinal direction (vertical direction) of the left guide frame 3 and the right guide frame 2, and over the entire longitudinal direction (vertical direction) of the inner guide portion 22.

[0035] In this embodiment, the flame-retardant sponge material SP is dimensioned to have a distance of 1 to 2 mm from the guide frame reinforcement material 23 before the reinforcing-material opening-side heat-foaming material 9b is foamed. This ensures ease of assembly of the inner guide portion 22 into the outer guide portion 21 while ensuring reliable contact between the flame-retardant sponge material SP and the guide frame reinforcement material 23 in the event of a fire. FIG. 6 is a schematic diagram showing how the inner guide portion 22 is assembled into the outer guide portion 21. In this embodiment, the above-described distance from the guide frame reinforcement material 23 prevents the flame-retardant sponge material SP from interfering with the outer guide portion 21 when the inner guide portion 22 is assembled into the outer guide portion 21, ensuring ease of assembly. Note that the distance between the flame-retardant sponge material SP and the guide frame reinforcement material 23 is not limited to the dimension of this embodiment, and may be appropriately set so that the flame-retardant sponge material SP and the guide frame reinforcement material 23 will contact each other in the event of a fire, as long as it does not impair ease of assembly.

[0036] In this embodiment, a heat-foaming material and a flame-retardant sponge material are provided inside the left guide frame 3 and the right guide frame 2, respectively. The operation of this embodiment in the event of a fire will now be described. FIG. 7 is a schematic diagram showing the foaming of the heat-foaming material in this embodiment. In the event of a fire, the temperature inside the guide frames and / or the surface temperature of the outer guide portion (guide frame reinforcement material) rises and reaches the foaming start temperature of the heat-foaming material. The foaming of the heat-foaming material closes the gap between the outer guide portion 21 and the inner guide portion 22 on the indoor side of the right guide frame 2, preventing flame penetration. Furthermore, the foaming of the heat-foaming material causes the inner guide portion to move to the outdoor side. This movement of the inner guide portion presses the flame-retardant sponge material provided in the inner guide portion against the inner circumferential surface of the outer guide portion, thereby closing the gap between the outer guide portion 21 and the inner guide portion 22 on the outdoor side of the right guide frame 2, preventing flame penetration. In this way, in the event of a fire, the expanded heated foam material and flame-retardant cushioning material block the space inside the left guide frame 3 and the right guide frame 2 that allows passage between indoors and outdoors, thereby preventing flames from passing through.

[0037] In particular, in this embodiment, even if the screen sways significantly due to pressure fluctuations during a fire, causing a gap between the expanded heated foam material 9 and the inner guide portion 22 due to the detachment (collapse) of a portion of the heated foam material 9, the cushioning properties of the flame-retardant buffer material seal the gap. For example, in this embodiment, the heated foam material 9b provided on the indoor side foams during a fire, sealing the gap between the indoor side of the inner guide portion 22 and the guide frame reinforcement member 23. When a gap is created due to the detachment (collapse) of a portion of the heated foam material 9 in the blocked portion caused by pressure fluctuations, the cushioning properties of the flame-retardant sponge material SP (flame-retardant buffer material) provided on the outdoor side urge the inner guide portion 22 toward the indoor side, sealing the gap. In this way, by providing a heated foam material on either the indoor side or the outdoor side inside the left guide frame 3 and the right guide frame 2 and a flame-retardant sponge material on the other side, gaps that may be created due to pressure fluctuations during a fire can be sealed and the passage of flames can be prevented.

[0038] The outdoor-side storage section 21g contains a heating foam material 9 as the guide frame opening-side heating foam material 9c along both ends. The heating foam material 9 is fixed to the outdoor-side storage section 21g using adhesive, double-sided tape, or the like. The heating foam material 9 foams when heated, thereby exhibiting fire resistance and fire prevention properties. 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 heating foam material 9 closes the gap, preventing flames from penetrating inside and outside the building.

[0039] First wall portion 21a of outer guide portion 21 is fixed to inner circumferential surface 7a, and outdoor-side 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-side storage portion 21g due to deterioration of adhesives or the like over time or due to melting of adhesives (approximately 120°C) before the heat-foamable material 9 starts to foam (approximately 200°C), its attachment position is maintained, and loss of function of heat-foamable material 9 is suppressed.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In the fire protection opening and closing device 1 of this embodiment, the heated foam material 9 foams 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.

[0051] In the lower frame 4 of this embodiment, grooves 47 are formed on the side surface 45a of the indoor side portion 45 and the side surface 46a of the outdoor side portion 46. A tightening mechanism 12 attached to the bottom frame 11 of the screen 5 is engaged with the grooves 47 on the side surface 45a of the indoor side portion 45 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 portion 45 constitute the engaged portions.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In the fire protection opening and closing device 1 of this embodiment, the heated foam material 9 foams in the event of a fire and blocks the gap between the outdoor inner surface and indoor 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 inner surface and indoor inner surface of the right guide frame 2 (and left guide frame 3).

[0056] 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.

[0057] 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 (approximately 120°C) before the heat-foaming material 9 starts to foam (approximately 200°C), its attachment position is maintained, and loss of the function of the heat-foaming material 9 is suppressed.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] The thread made of a non-combustible material that makes up the retaining portion 51 can be, for example, a thread made of stainless steel, and in this embodiment, the retaining portion 51 is made of stainless steel thread. In particular, in this embodiment, the retaining portion 51 is made into a substantially spherical shape by sewing stainless steel thread multiple times along the vertical side 5a, and is formed to a thickness that does not allow it to pass through the slit 22a.

[0062] In this embodiment, retaining auxiliary portions 52 made of a non-combustible 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. Staples, for example, can be used as such retaining auxiliary portions 52. In this embodiment, steel staples are used.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] The base material 61 is made of steel and is thick, so that the rigidity of the storage box 6 is increased.

[0068] 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.

[0069] 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 sides. 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).

[0070] 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 heat-expanding foam material 9 is disposed in the space S, and in the event of a fire, the heat-expanding foam material 9 expands and closes 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 during normal times.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] Fig. 8 is a cross-sectional view of the right guide frame of a fire opening / closing device according to the second embodiment. In the embodiment shown in Fig. 8, a heat-foaming material 9 serving as a heat-foaming material 9b on the opening side of the reinforcement is provided on the outdoor side of the guide frame reinforcement 23, at least a portion of which faces the inner guide portion 22. In addition, a flame-retardant sponge material SP made of chloroprene is provided on the inner guide portion 22 of this embodiment, at least a portion of which faces the indoor side of the guide frame reinforcement 23, as a flame-retardant cushioning material.

[0081] Fig. 9 is a cross-sectional view of the right guide frame of a fire opening / closing device according to a third embodiment. In the embodiment shown in Fig. 9, a flame-retardant sponge material SP made of chloroprene is provided as a flame-retardant cushioning material on the outdoor side of the inner guide portion 22, at least a portion of which faces the outdoor side of the guide frame reinforcement material 23. In addition, a heated foaming material 9 is provided as a reinforcement opening-side heated foaming material 9b on the indoor side of the inner guide portion 22, at least a portion of which faces the indoor side of the guide frame reinforcement material 23.

[0082] Fig. 10 is a cross-sectional view of the right guide frame of a fire opening / closing device according to the fourth embodiment. In the embodiment shown in Fig. 10, a heat-foaming material 9 serving as a heat-foaming material 9b for a reinforcement opening is provided on the outdoor side of the inner guide portion 22, at least a portion of which faces the outdoor side of the guide frame reinforcement 23. In addition, a flame-retardant sponge material SP made of chloroprene is provided as a flame-retardant cushioning material on the indoor side of the inner guide portion 22, at least a portion of which faces the indoor side of the guide frame reinforcement 23.

[0083] Fig. 11 is a cross-sectional view of the right guide frame of a fire opening / closing device according to the fifth embodiment. In the embodiment shown in Fig. 11, a heat-foaming material 9 serving as a heat-foaming material 9b for the opening side of the reinforcement is provided on the indoor side of the guide frame reinforcement 23, at least a portion of which faces the inner guide portion 22. In addition, a flame-retardant sponge material SP made of chloroprene is provided as a flame-retardant cushioning material on the outdoor side of the guide frame reinforcement 23, at least a portion of which faces the outdoor side of the inner guide portion 22.

[0084] Fig. 12 is a cross-sectional view of the right guide frame of a fire opening / closing device according to the sixth embodiment. In the embodiment shown in Fig. 12, a heated foaming material 9 serving as a reinforcement opening-side heated foaming material 9b is provided on the outdoor side of the guide frame reinforcement 23, at least a portion of which faces the inner guide portion 22. In addition, a flame-retardant sponge material SP made of chloroprene is provided on the indoor side of the guide frame reinforcement 23, at least a portion of which faces the indoor side of the guide frame reinforcement 23, as a flame-retardant cushioning material. [Industrial Applicability]

[0085] According to the present invention, it is possible to provide an opening and closing device that can exhibit stable fire protection and resistance even against pressure fluctuations that occur when a fire occurs. [Explanation of symbols]

[0086] 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

Claims

1. A left guide frame and a right guide frame; a screen whose width direction end portions are surrounded by the left guide frame and the right guide frame and which is wound up and unwound along the left guide frame and the right guide frame, a heat-foaming material is provided on one of the indoor and outdoor sides inside the left guide frame and the right guide frame, and a flame-retardant buffer material is provided on the other of the indoor and outdoor sides inside the left guide frame and the right guide frame, The left guide frame and the right guide frame each include an outer guide portion and an inner guide portion, The fire-prevention opening and closing device is characterized in that the heat-foaming material and the flame-retardant buffer material are provided between the inner periphery of the outer guide portion and the outer periphery of the inner guide portion.

2. 2. The fire opening and closing device according to claim 1, wherein the heat-foaming material and the flame-retardant buffer material are provided along the longitudinal direction of the left guide frame and the right guide frame.

3. 3. A fire-retardant opening and closing device according to claim 1, wherein one of the heat-foaming material and the flame-retardant buffer material is provided on the inner periphery of the outer guide portion, and the other is provided on the outer periphery of the inner guide portion.

4. 4. The fire opening and closing device according to claim 3, wherein the heat-foaming material is provided on the inner periphery of the outer guide portion, and the flame-retardant buffer material is provided on the outer periphery of the inner guide portion.

5. 3. The fire opening and closing device according to claim 1, wherein the heat-foaming material and the flame-retardant buffer material are provided on an outer periphery of the inner guide portion.

6. 3. The fire opening and closing device according to claim 1, wherein the heat-foaming material and the flame-retardant buffer material are provided on an inner periphery of the outer guide portion.

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