JP7798581B2 - Screen-equipped opening and closing devices and release parts - Google Patents

Description

The present invention relates to an opening and closing device and release part equipped with a screen, and in particular to a fire-protection opening and closing device that can be used as fire protection equipment.

In the unlikely event of a fire, there is a demand for installing fire prevention equipment at building openings to prevent potential personal injury and the spread of fire. In recent years, such fire prevention equipment has come to be used in the form of a fire opening/closing device equipped with a flexible sheet-like screen that can be rolled up and down along a frame attached to the inner periphery of the building opening.

For example, Japanese Patent Application Laid-Open Publication No. 8-303147 discloses an opening and closing device equipped with a roller blind 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.

Japanese Patent Application Publication No. 8-303147

In the opening and closing device described in Patent Document 1, the weight of the weight bar 6 pulls downward the fabric 2 serving as a screen made of a non-flammable or flame-retardant material such as silica cloth, maintaining a stretched state. This prevents flames from penetrating between the interior and exterior of a 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 may be turned up and the closed state may 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 prevention performance, and there is a risk that privacy may not be sufficiently protected during normal times. Furthermore, there is a demand for technology that allows firefighters to release the closed state of the opening and closing device from the outside when entering from outside in the event of a fire, during fire training, etc.

The present invention was made to solve these problems, and aims to provide an opening and closing device and a release part that uses a screen tightening mechanism to prevent the screen of the opening and closing device from being flipped up and suddenly released from its closed state during both fires and normal times, and that can easily release the closed state of the screen tightening mechanism from the outside when necessary.

In order to solve the above problems, the opening and closing device of the present invention comprises a screen whose width direction 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, and a screen release part which 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 .

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

The opening and closing device of the present invention preferably includes 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 established by the tightening mechanism.

In the opening and closing device of the present invention, it is preferable that 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.

It is preferable that the opening and closing device of the present invention further comprises an indicator member that indicates the release position.

In the opening and closing device of the present invention, it is preferable that the release component be fixed in the non-release position.

According to this invention, the screen tightening mechanism prevents the screen of the opening and closing device from being flipped up and suddenly released from the closed state during both fires and normal times, and when necessary, the closed state of the screen can be easily released from the outside using the screen tightening mechanism.

FIG. 1 is a central vertical cross-sectional view of a fire protection opening and closing device according to an embodiment. Cross-sectional view of the same Enlarged view of the main part of the screen Enlarged view of the bottom frame Enlarged view of the main part at the bottom longitudinal end of the right guide frame 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. 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. (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. 1A to 1E are a plan view, a front view, a right side view, a left side view, and a bottom view of the latch member, respectively. Schematic perspective view of the tightening mechanism FIG. 10 is a diagram showing a state in which the base member and the latch member are connected to each other. 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. 1A and 1B are perspective views of the release part of this embodiment. Reference diagram showing the use of fire protection opening and closing devices Reference diagram showing the use of fire protection opening and closing devices Reference diagram showing the use of fire protection opening and closing devices

Embodiments of the present invention will be described in detail below with reference to the drawings. Note that in this specification, common components will be designated by common terminology, will be illustrated in approximately the same manner in each drawing, and detailed descriptions will be omitted, and will be indicated by the same reference numerals as necessary.

Figure 1 is a central longitudinal cross-sectional view of an opening/closing device equipped with a screen release component that releases the closed state maintained by the screen closed state maintenance mechanism according to this embodiment, and Figure 2 is a transverse cross-sectional view of the same. The opening/closing device 1 of this embodiment is installed in or inside an opening in a building or structure such as a house, building, warehouse, factory, underground mall, tunnel, or vehicle loading platform, and can be used as a shutter device to open and close the opening, or to partition or open the space inside the structure. However, as a particularly preferred embodiment, an example of a window shutter device attached to the interior side of a sash window in an architectural opening will be described.

As shown in Figures 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.

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

Because the right guide frame 2 and the left guide frame 3 are configured substantially identically, only an example of the configuration of the right guide frame 2 will be described, and an example of the configuration 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 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 this embodiment, the right guide frame 2 is configured such that, when the fire opening/closing device 1 is installed in the opening 7, the longitudinal ends of the first wall portion 21a, the second wall portion 21b, and the third wall portion 21c on the lower frame 4 side abut the inner circumferential surface 7a to which the lower frame 4 is attached. As shown in Figure 5, the pair of fourth walls 21d have their longitudinal ends cut out on the lower frame side, so that when the fire opening and closing device 1 is attached to the opening 7, the longitudinal ends on the lower frame 4 side abut against the upper surface 44a of the upper part 44 of the lower frame 4, which will be described later.

A pair of outdoor protruding walls 21e are formed at the outdoor end of the first wall 21a. The pair of outdoor protruding walls 21e have bent portions 21f at their tips that bend them toward each other. The outer guide portion 21 defines an outdoor storage portion 21g by the first wall 21a, the pair of outdoor protruding walls 21e, and the bent portions 21f.

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

A pair of protruding wall portions 21k are formed on the first wall portion 21a between a pair of outdoor-side protruding wall portions 21e and a pair of indoor-side protruding wall portions 21h.

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 are formed at the ends of the pair of fourth wall portions 21d on the opening 21l side. The end of the bottom frame 11, to which the leading edge of the screen 5 is attached, fits into the opening 21l, and when winding and unwinding the screen 5, the bottom frame 11 slides up and down while being guided by the pair of protrusions 21m.

In this embodiment, a guide frame reinforcement 23 is provided on the inner periphery of the outer guide portion 21. In this embodiment, the guide frame reinforcement 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 the recess 42 of the lower frame 4, described below, is formed. In other words, in this embodiment, the guide frame reinforcement 23 is not provided below the upper surface 44a of the lower frame 4. As shown in Figure 2, the guide frame reinforcement 23 in this embodiment is formed along the entire inner periphery of the outer guide portion 21 in the longitudinal direction.

The guide frame reinforcement 23 supports the outer guide section 21 from within, providing the outer guide section 21 with the rigidity to withstand deformation caused by external forces such as fire, and preventing flames from penetrating the outer guide section 21 from both indoors and outdoors.

The outer guide portion 21 may be, for example, an aluminum molded part, and the guide frame reinforcement member 23 may be, for example, a steel molded part. 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 Figure 2.

In this embodiment, a heated foam material 9 serving as a heated foam material 9b on the opening side of the reinforcement is provided on the indoor side of the guide frame reinforcement 23, with at least a portion facing the inner guide section 22. Furthermore, in this embodiment, a flame-retardant (e.g., chloroprene) sponge material SP is provided on the inner guide section 22, with at least a portion facing the outdoor side of the guide frame reinforcement 23.

The outdoor storage section 21g contains a heated foam material 9 serving as the guide frame opening-side heated foam material 9c, stretching across both ends. The heated foam material 9 is fixed to the outdoor storage section 21g using adhesive, double-sided tape, or the like. The heated foam material 9 expands when heated, providing 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 heated foam 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 heated foam material 9.

The first wall portion 21a of the outer guide portion 21 is fixed to the inner circumferential surface 7a, and the outdoor storage portion 21g is blocked by the inner circumferential surface 7a, so that the heat-foaming material 9 is contained between the inner circumferential surface 7a and the outer guide portion 21. Therefore, even if the heat-foaming material 9 peels off from the outdoor storage portion 21g due to deterioration of the adhesive over time or due to the adhesive melting (approximately 120°C) before the heat-foaming material 9 begins to expand (approximately 200°C), its attachment position is maintained, preventing the heat-foaming material 9 from losing its functionality.

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, to prevent light from leaking from the outdoors through gaps that occur between the inner surface 7a and the first wall section 21a.

Figure 3 is an enlarged view of a key portion of the screen. The inner guide portion 22 can be, for example, an aluminum molded product, and as shown in Figures 2 and 3, is formed from a cylindrical section having slits 22a as guide grooves along which the vertical edges 5a of the screen 5 slide. In this embodiment, the inner guide portion 22 has the slits 22a formed by fitting the outdoor member 22c into the indoor member 22b. The inner guide portion 22 is formed elongatedly to fit along the outer guide portion 21, and is placed independently on the lower frame 4 disposed (engulfed) at 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 clearance is formed around all sides of the inner guide portion 22.

The lower frame 4 can be, for example, an aluminum molded part, and as shown in Figures 1 and 2, is a long piece that is fixed to the inner peripheral surface 7a between the lower ends of the right guide frame 2 and the left guide frame 3, with a roughly C-shaped cross section. The back surface 41a of the bottom 41 of the lower frame 4 forms the attachment surface for the inner peripheral surface 7a, and the upper part 44 on the side opposite the bottom 41 is provided with a recess 42 into which the lower end of the bottom frame 11, which is provided at the lower end of the screen 5 (described below), fits.

In particular, in this embodiment, the lower frame 4 is configured so that both ends 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 ends of the longitudinal end 4E and the right guide frame 2 and the left guide frame 3.

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 along the entire length of the lower frame 4, abutting 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.

Specifically, in a longitudinal cross section of the lower frame reinforcement 43 of this embodiment, the lower frame reinforcement 43 is formed from a bottom portion 43a that abuts against the bottom portion 41 of the lower frame 4, a pair of upright portions 43b that extend from both ends of the bottom portion 43a toward the upper portion 44 of the lower frame 4, and a pair of bent portions 43c that extend 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.

The bottom portion 43a, in the longitudinal cross section of the lower frame reinforcement 43, has a dimension equal to the distance between a pair of outdoor-facing protruding wall portions 41e and a pair of indoor-facing 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 portion 43a when the screen 5 is closed. The pair of bent portions 43c are configured parallel to the bottom portion 43a, and the indoor-facing end and outdoor-facing end are each covered by the upper portion 44 of the lower frame 4.

In particular, in this embodiment, the lower frame reinforcement 43 is formed along 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 in 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.

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 or left guide frame 3. In other words, in this embodiment, a space where neither the guide frame reinforcement 23 nor the lower frame reinforcement 43 is provided is provided at a portion of the joint between the right guide frame 2 or left guide frame 3 and the lower frame 4, i.e., a space S for absorbing thermal expansion of the frame reinforcement. 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.

The fire opening and closing device 1 of this embodiment has a heated foam material 9 in this space S as the guide frame lower end heated foam material 9a. Specifically, in this embodiment, the heated 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 of the right guide frame 2 in Figure 5, the heated 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 from the longitudinal end 23E of the guide frame reinforcement member 23. In addition, in this embodiment, the heated foam material 9 is fixed with a gap from the second wall portion 21b and the third wall portion 21c. Furthermore, in this embodiment, the heated 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.

In the fire opening and closing device 1 of this embodiment, the heated foam material 9 expands in the event of a fire, blocking off the space S where no frame reinforcement material is provided, thereby preventing flames from penetrating through the space S to the interior and exterior of the building.

Figure 6 is an enlarged view of the lower frame 4 and the tightening mechanism 12, showing the tightening mechanism 12 (described below) engaged with the lower frame 4. Figure 7 is an enlarged view of the lower frame 4 and the tightening mechanism 12, showing the tightening mechanism 12 disengaged from 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 portion 45 and the side surface 46a of the outdoor side portion 46. The grooves 47 on the side surface 45a of the indoor side portion 45 engage with latch members 14 of the tightening mechanism 12 (described below) that are attached to the bottom frame 11 of the screen 5 to maintain the screen 5 in a closed state. That is, in this embodiment, the grooves 47 formed on the side surface 45a of the indoor side portion 45 constitute the engaged portions.

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

As shown in Figures 6 and 7, the lower frame 4 of this embodiment has a curved chamfered portion 48 that continues above the groove 47 between the upper surface 44a and the indoor side surface 45a. In this embodiment, a chamfered portion 48 is also formed between the upper surface 44a and the outdoor side surface 46a.

As such, the fire opening and closing device 1 of this embodiment has a heated foam 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 left guide frame 3), i.e., between the bottom frame 4 and the outdoor-facing inner surface and the indoor-facing inner surface of the right guide frame 2 (and left guide frame 3). In other words, in this embodiment, the heated foam material 9 is concealed by the right guide frame 2 (and left guide frame 3), so it does not detract from 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 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 left guide frame 3) does not rise, foaming can occur due to an increase in the surface temperature of the other.

In the fire opening and closing device 1 of this embodiment, the heated foam material 9 expands in the event of a fire, sealing off the gap between the bottom frame 4 and the outdoor-side inner surface and indoor-side inner surface of the right guide frame 2 (and left guide frame 3), thereby preventing flames from penetrating from the inside to the outside through the gap between the bottom frame 4 and the outdoor-side inner surface and indoor-side inner surface of the right guide frame 2 (and left guide frame 3).

Similar to the first wall portion 21a of the right guide frame 2, the back surface 41a is formed with a pair of outdoor-side protruding wall portions 41e having bent portions 41f at their tips, forming an outdoor-side storage portion 41g. Furthermore, the back surface 41a is formed with a pair of indoor-side protruding wall portions 41h having bent portions 41i at their tips, forming an indoor-side storage portion 41j.

Like the outdoor storage section 21g of the right guide frame 2, the outdoor storage section 41g accommodates heated foam material 9 as the lower frame opening-side heated foam material 9d along both ends. The back surface 41a of the lower frame 4 is fixed to the inner circumferential surface 7a, and the outdoor storage section 41g is sealed by the inner circumferential surface 7a, so that the heated foam material 9 is contained between the inner circumferential surface 7a and the outdoor storage section 41g. Therefore, even if the heated foam material 9 peels off from the outdoor storage section 41g due to deterioration of the adhesive over time or melting of the adhesive (approximately 120°C) before the heated foam material 9 begins to expand (approximately 200°C), its attachment position is maintained, preventing the functionality of the heated foam material 9 from being impaired.

The indoor storage section 41j contains a gap concealing material 10, similar to the indoor storage section 21j of the right guide frame 2. This gap concealing material 10 prevents light from leaking from the outdoors through gaps that occur between the inner circumferential surface 7a and the back surface 41a.

In this embodiment, the heated foam material 9 is placed in the outdoor storage section 21g of the right guide frame 2 (and left guide frame 3) and the outdoor storage section 41g of the lower frame 4. However, the placement position, range, and number of heated foam material 9 are not limited as long as it is on the opening 7 (inner surface 7a) side. For example, it may be placed in the indoor storage section 21j and the indoor storage section 41j, or it may be placed in both the outdoor storage section 21g and the outdoor storage section 41g and the indoor storage section 21j and the indoor storage section 41j. The heated foam material 9 may also be placed in the center of the first wall section 21a and the back surface 41a.

The screen 5 is fireproof and made of glass cloth, silica cloth, or 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.

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

In this embodiment, retention assisting portions 52 made of a non-combustible material are formed at the widthwise ends of the screen 5. In particular, in this embodiment, retention assisting 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 left guide frame 3) so as to overlap with retention portions 51. For example, stapler needles can be used as such retention assisting 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. In addition to stainless steel, other materials that can be used for stapler needles include steel, aluminum, copper, etc. Furthermore, the material of the stapler needles may be the same as or different from the material of the non-combustible thread that makes up retention portion 51.

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

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

Figure 4 is an enlarged view of the bottom frame 11. As shown in Figures 1 and 4, the bottom frame 11 is attached to the entire lower end of the screen 5 in this embodiment, covering 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. The screen 5 is screwed to the outdoor-side member 112 with the aluminum plate 53 as a seat, sandwiching the lower end of the screen 5. The indoor-side member 111 is then 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.

The indoor-side member 111 that constitutes 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 the mounting section 131 of the base member 13 (described below) formed along the entire longitudinal direction. The storage section 111b is formed to communicate with the opening 111a. In this embodiment, the base member 13 is attached to the lower end of the screen 5 by storing the mounting section 131 of the base member 13 in the storage section 111b.

The opening/closing device 1 of this embodiment includes a base member 13 attached to the lower end of the screen 5, and a tightening mechanism 12 for the screen 5, which includes a latch member 14 rotatably attached to 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 constructed, for example, from aluminum die-casting, and includes an attachment portion 131 housed in the housing 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 operated to move the screen 5 up or down from any vertical position. The longitudinal dimension of the base member 13 (the left-right direction in the opening/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 this embodiment, the longitudinal dimensions of all parts of the base member 13 are shorter than those of the indoor side member 111.

The base member 13 can be attached to the indoor side member 111 by inserting the mounting portion 131 from the longitudinal end of the storage portion 111b. In this embodiment, the mounting portion 131 and storage portion 111b are configured so that a small gap is created between the mounting portion 131 and storage portion 111b when the mounting portion 131 is stored in the storage portion 111b. This configuration allows the mounting portion 131, inserted from the longitudinal end of the storage portion 111b, to slide longitudinally within the storage portion 111b. Therefore, in this embodiment, the indoor side member 111 can easily move to its fixed position in the longitudinal direction of the base member 13.

Threaded holes 131a are formed on both longitudinal ends of the lower end of the mounting portion 131. The base member 13 is fixed to a longitudinal position on the indoor side member 111 by being screwed into threaded holes (not shown) formed in the indoor side member 111 via these threaded holes 131a. The fixed 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 threaded holes formed in the indoor side member 111. In this embodiment, the base member 13 is fixed to the longitudinal center of the indoor side member 111.

The connecting portion 132 to which the latch member 14 is connected has a generally cylindrical shape. Threaded holes 132a for screwing the latch member 14 are formed on the side surfaces of both longitudinal ends of the connecting portion 132. In this embodiment, the connecting portion 132 is configured so that both longitudinal ends are located 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.

In this embodiment, the connecting portion 132 is connected (formed continuously) to the mounting portion 131 via the connecting portion 134. The connecting portion 134 is configured so that both ends in the longitudinal direction are flush with both ends of the mounting portion 131.

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 thereof 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 formed by the arc surface of the same circle.

In this embodiment, the operating unit 133 is configured so that both longitudinal ends are located longitudinally outboard 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 underside of the storage box 6 when the screen 5 is wound onto the drum 62 (described below) and the bottom frame 11 moves upward, thereby also functioning as an abutment surface that determines the position of the top of the bottom frame 11. In addition, a plate-shaped portion 136 extending upward from the upper end of the indoor side of the 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.

Figures 9A to 9E are a plan view, a front view, a right side view, a left side view, and a bottom view, respectively, of the latch member 14. The latch member 14 of this embodiment can be made, for example, from aluminum die-casting, and includes a connecting portion 141 that connects to the base member 13, a locking portion 142 that locks into the groove portion 47, and a lever portion 143.

The connecting portion 141 in this embodiment has a notched cylindrical shape with a hollow portion 141a formed throughout its entire length and an opening 141b provided along the length of the cylinder, and is configured so that its longitudinal dimensions are the same as the longitudinal dimensions of the mounting portion 131, connecting portion 134, and plate-like portion 136 of the base member 13.

The hollow portion 141a accommodates the connecting portion 132 of the base member 13. In this embodiment, the hollow portion 141a 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.

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 portion where the connecting portion 132 connects to the notched 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 notched cylindrical portion 135), and smaller than the diameter of the connecting portion 132.

In this embodiment, as shown in Figure 11, the latch member 14 can be attached to the base member 13 by inserting the connecting portion 132 from the longitudinal end of the hollow portion 141a while the notched cylindrical portion 135 of the base member 13 is positioned within the opening range of the opening 141b of the connecting portion 141.

In particular, in this embodiment, because 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, as 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, as shown in FIG. 7. Furthermore, the screw fastening of the connecting portion 132, described below, prevents the connecting portion 132 from slipping out of the opening 141b, thereby preventing the latch member 14 from falling off the base member 13.

In this embodiment, the connecting portion 141 has notched cylindrical recesses 141f formed on both longitudinal ends of the inner circumferential surface 141e that constitutes the hollow portion 141a. The notched cylindrical recesses 141f are formed across 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 longitudinal length of the connecting portion 132.

By forming this 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.

In this embodiment, as shown in Figure 11, 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.

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 tubular portion 135 of the base member 13, the locking portion 142 locks into the groove portion 47 of the lower frame 4. Furthermore, 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 tubular portion 135 of the base member 13, the locking portion 142 is positioned outside the groove portion 47 and is not locked into the groove portion 47.

The lever portion 143 extends in a direction away from the rotation axis direction of the latch member 14, and in this embodiment is formed on the outer periphery of the connecting portion 141. In this specification, the 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 the rotation axis-side end of the lever portion 143. In this embodiment, the lever portion 143 is formed so that, in a plane perpendicular to the longitudinal direction of the latch member 14, the angle it forms with the plate-shaped portion 144 is greater than or equal to 90 degrees and less than 180 degrees. The indoor end of the lever portion 143 is formed in a cylindrical shape, and both longitudinal ends of the lever portion 143 are configured to be located longitudinally outward of both longitudinal ends of the plate-shaped portion 144.

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

The base material 61 is made of steel and is thick, increasing the rigidity of the storage box 6.

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 heated foam material may be placed inside the storage section.

The opening and closing device 1 of this embodiment is equipped 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 equipped 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 the groove portion 47, which serves as the locked portion to which the tightening mechanism 12 is engaged when the screen 5 is closed.

Figures 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 Figures 13(A) and 13(B) are perspective views of the release part 15 of this embodiment. The release part 15 of this embodiment comprises 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.

In this embodiment, the mounting portion 151 is composed of a bottom portion 151A, an indoor side portion 151B, and an outdoor side portion 151C. In this embodiment, the indoor side portion 151B and the outdoor side portion 151C are configured so that the distance between the indoor side portion 151B and the outdoor side 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 portion 151B and the outdoor side portion 151C, the release component 15 can be attached to the lower end of the screen 5 to which the bottom frame 11 is attached.

The operating unit 152 of this embodiment includes a top surface 152A, one end of which is connected to the upper end of the outdoor side surface 151C, a side surface 152B extending from the other end of the top surface 152A toward the lower frame 4, a bottom surface 152C extending from the lower end of the side surface 152B toward the outdoor side surface 151C, and pressing portions 152D connected to the top surface 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.

The release section 153 of this embodiment includes a top surface 153A, one end of which is connected to the upper end of the indoor side surface 151B, and a side surface 153B that extends from the other end of the top surface 153A toward the lower frame 4. In particular, the release section 153 of this embodiment includes inclined surface sections 153C, which slope toward the indoor side surface 151B, at both left and right ends of the side surface 153B in the opening/closing device. 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. However, even if they come into contact with the chamfered section 48 due to the inner surface 7a of the opening or the installation state of the components, point contact with the curved surface minimizes resistance, allowing the release part 15 to move smoothly along the longitudinal direction of the lower end of the screen 5.

When it is not necessary to release the screen 5 from its closed state by the tightening mechanism 12, the release component 15 is in a non-release position that does not release the screen 5 from its closed state by the tightening mechanism 12. In this embodiment, the tightening mechanism 12 is located 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 the top surface 152A of the operating section 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 screen 5 from its closed state.

In this embodiment, the release part 15 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 indicator member, or sticker, 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.

Figures 14 to 16 are reference diagrams showing the use of the fire opening and closing device of this embodiment. When the release element 15 of this embodiment is moved 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 in the closed state, thereby releasing the closed state of the screen's 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 is moved 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 an inclined surface 153C, insertion of the release element 153 between the latch member 14 and the bottom frame 11 is not impeded, allowing the release element 15 to move smoothly to the release position. When the release part 15 has completed its movement to the release position, the indoor end of the top surface 153A of the release part 153 is located closer to the indoor side than the indoor end of the latch member 14 in the closed position, causing the latch member 14 to rotate in a direction that disengages the engaging portion 142 of the latch member 14 from the groove portion 47, which serves as the engaged portion, thereby releasing the engagement and releasing the closed position.

The fire opening and closing device 1 of this embodiment is equipped with a screen tightening mechanism 12 that includes a base member 13 attached to the lower end of the screen 5 and a latch member 14 rotatably attached to the base member 13. This latch member 14 is formed with a lever portion 143 that extends in a direction away from the rotational axis of the latch member 14. Therefore, the weight of the lever portion 143 urges the latch member 14 into the groove portion 47, which serves as the latched portion with which the locking portion 142 of the latch member 14 locks. In addition, a lower frame reinforcement member 43 attached to the lower frame 4 suppresses deformation of the lower frame 4 (locked portion) in the event of a fire, maintaining the latch member in engagement.

In addition, the right guide frame 2 (and left guide frame 3) has a guide frame reinforcement 23 attached to the inner periphery of the outer guide section 21, and the inner guide section 22, which houses the vertical side of the screen 5, is housed inside the outer guide section 21 so that clearance is formed around all sides of it. Therefore, in the event of a fire, the guide frame reinforcement 23 prevents deformation of the right guide frame 2 (and left guide frame 3), and the clearance formed around the inner guide section 22 also prevents deformation of the inner guide section 22 due to high temperatures, etc., so the vertical side of the screen 5 will not come out of the right guide frame 2 (and left guide frame 3).

In addition, at the joint between the right guide frame 2 (and left guide frame 3) and the bottom frame 4, neither the guide frame reinforcement 23 nor the bottom frame reinforcement 43 is provided, leaving a space S 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 during 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 heated foam material 9 is placed in the space S, which expands during a fire to close off the space S where no frame reinforcement is provided. This prevents the screen 5 of the opening and closing device 1 from flipping up and releasing the closed state, thereby preventing flames from penetrating inside and outside during a fire, providing sufficient fire protection. It also provides sufficient privacy protection during normal times.

In the above embodiment, the lower frame 4 has a chamfered portion 48 between the upper surface 44a and the indoor 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 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, simply by pressing the operating portion 133 downward to close the screen 5, the locking portion 142 can be easily locked into the groove portion 47, which serves as the locked portion. Furthermore, 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.

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 storage operation of the screen 5 simple.

Furthermore, the above embodiment is equipped with a screen release component 15 that releases the closed state of the tightening mechanism 12. This allows the closed state of the screen tightening mechanism 12 to 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 is reliably maintained in situations where releasing 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 releasing the closed state is intended. Therefore, even if it becomes necessary to release the closed state of the screen, for example, during a fire drill, the opening and closing device can be easily returned to the unlocked state it was in before the drill without damaging the opening and closing device.

In particular, the release parts 15 of the screen in this embodiment do not require other components (such as the bottom frame 11) to be pierced for installation. Therefore, no gaps are created by piercing other components. This means that the release parts 15 can be installed without creating gaps through which flames can pass. In other words, the release parts 15 can be installed without compromising fire protection performance.

In the above embodiment, the release part 15 is attached to the lower end of the screen 5. This eliminates the need to provide a separate installation location for the release part 15, and also prevents the release part 15 from being lost.

In the above embodiment, the release component 15 includes an attachment portion 151 that attaches the release component 15 to the lower end of the screen 5, an operation portion 152 that is operated when moving the release component 15, and a release portion 153 that releases the closed state of the tightening mechanism 15. Therefore, with a simple configuration, it is possible to attach the release component 15 to the lower end of the screen 5, move the release component 15, and release the closed state.

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, 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. Therefore, the closed state of the tightening mechanism 12 can be released with a simple operation.

The above embodiment further includes an indicator member that indicates the release position. This prevents the release part 15 from being moved to the wrong position when the closed state of the screen tightening mechanism 12 is intended to be released, ensuring that the closed state is released reliably.

In the above embodiment, the release component 15 is fixed in the non-release position. This reliably prevents the screen tightening mechanism 12 from releasing the closed state in situations where this release is not intended.

In the above embodiment, the notched cylindrical portion 135, step portion 141g, and connecting portion 132 are used as a seat to screw the latch member 14 to the base member 13. Furthermore, to position the seat formed by the notched cylindrical portion 135, step portion 141g, and connecting portion 132 more inward than the longitudinal end of the hollow portion 141a, notched cylindrical recesses 141f are provided on both longitudinal ends of the latch member 14. This configuration eliminates the need to use a separate member as a seat and also makes the presence of the screws less visible.

In the fire opening and closing device 1 of this embodiment, the widthwise ends of the screen 5 are formed with retaining sections 51 made of threads made of a non-combustible material. Therefore, even if the retaining sections 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 retaining sections 51 overlap radially on the widthwise end sides of the screen 5 when the screen 5 is rolled up, 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 installation locations, and a decrease in the aesthetic appearance of the building opening, while also preventing a decrease in the operability of the fire opening and closing device.

In addition, 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. This non-combustible plate 53 not only protects the lower end of the screen 5 from fire, but can also 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 improved fire protection and a simplified mounting structure for attaching the bottom frame 11 to the screen 5.

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.

Furthermore, in the fire opening and closing device 1 of this embodiment, the anti-detachment auxiliary parts 52 made of a non-combustible material are formed on the widthwise ends of the screen 5, so that the sheet-like screen 5 can be prevented from coming off the right guide frame 2 and left guide frame 3 even if the right guide frame 2 and left guide frame 3 are deformed during a fire, or if a large force is applied to the screen 5, such as when a child pushes hard on the screen 5 under normal circumstances.

In the above embodiment, a stapler is used as the retaining auxiliary part 52, but the retaining auxiliary part 52 is not limited to a stapler as long as it is possible to prevent the screen 5 from coming off even when a large force is applied. Furthermore, if it is possible to prevent the screen 5 from coming off without providing the retaining auxiliary part 52, it is not necessary to provide the retaining auxiliary part 52.

In the above embodiment, only the retaining portion 51 made of thread made of a non-combustible material is formed as the retaining portion 51, but as long as the effects of the present invention are achieved, a retaining portion other than the retaining portion made of thread made of a non-combustible material may also be formed.

In the above embodiment, the heated foam material 9 serving as the guide frame lower end 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 in any component or position as long as it is in a space that faces the longitudinal end 43E of the lower frame reinforcement member 43 and the longitudinal end 23E of the guide frame reinforcement member 23.

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

The present invention is not limited to the embodiments described above, and many modifications within the technical spirit of the present invention are possible for those with ordinary skill in the art. For example, in the above embodiment, the locking portion is locked into a groove in the lower frame, but it may also be locked into another part of the lower frame, or a locking portion may be provided on the building.

This invention provides an opening and closing device that uses a screen tightening mechanism to prevent the screen of the opening and closing device from flipping up and releasing the closed state during both fires and normal times, while also providing a release component that can easily release the closed state of the screen tightening mechanism from the outside when necessary.

1: opening and closing device 2: right guide frame 21: outer guide portion 21a: first wall portion 21b: second wall portion 21c: third wall portion 21d: pair of fourth wall portions 21e: pair of outdoor-side protruding wall portions 21f: bent portion 21g: outdoor-side storage portion 21h: pair of indoor-side protruding wall portions 21i: bent portion 21j: indoor-side storage portion 21k: pair of protruding wall portions 21l: opening 21m: pair of protruding portions 22: inner guide portion 22a: slit 23: guide frame reinforcement member 3: left guide frame 4: bottom frame 4E: longitudinal end portion 41: bottom portion 41a: back surface 41e: pair of outdoor-side protruding wall portions 41f: bent portion 41g: outdoor-side storage portion 41h: pair of indoor-side protruding wall portions 41i: bent portion 41j: indoor-side storage portion 42: Recess 43: Lower frame reinforcement 43a: Bottom 43b: Pair of upright portions 43c: Pair of bent portions 43E: Longitudinal end 44: Upper portion 44a: Top surface 45: Indoor side portion 45a: Side surface 46: Outdoor side portion 46a: Side surface 47: Groove portion (engaged portion)
48: Chamfered portion 5: Screen 5a: Vertical side 5b: Bottom end 51: Removal prevention portion 52: Removal prevention auxiliary portion 53: Plate 6: Storage box 60: Main body 61: Base material 62: Drum 7: Opening 7a: Inner peripheral surface 8: Frame 9: Heated foaming material 9a: Heated foaming material on lower end side of guide frame 9b: Heated foaming material on opening side of reinforcing material 9c: Heated foaming material on opening side of guide frame 9d: Heated foaming material on opening side of lower frame 10: Gap hiding material 11: Bottom frame 111: Indoor side member 111a: Opening 111b: Storage portion 112: Outdoor side member 12: Tightening mechanism 13: Base member 131: Mounting portion 131a: Screw hole 132: Connecting portion 132a: Screw hole 133: Operating portion 133a: Top surface 133b: Bottom surface 134: Connection portion 134a: Recess 135: Notched cylindrical portion 136: Plate-shaped portion 14: Latch member 141: Connecting portion 141a: Hollow portion 141b: Opening 141c: One end 141d: Other end 141e: Inner peripheral surface 141f: Notched cylindrical recess 141g: Step portion 142: Locking portion 143: Lever portion 15: Release part 151: Mounting portion 151A: Bottom portion 151B: Indoor side surface portion 151C: Outdoor side surface portion 152: Operation portion 152A: Top surface portion 152B: Side surface portion 152C: Bottom surface portion 152D: Pressing portion 153: Release portion 153A: Top surface portion 153B: Side surface portion 153C: Inclined surface portion H: Thickness h: Thickness

Claims (6)

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 . The opening and closing device described in claim 1, characterized in that the screen release component releases the closed state of the screen tightening mechanism by releasing the engagement between the screen tightening mechanism and the locked portion to which the tightening mechanism is locked when the screen is in the closed state. 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. 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. The opening and closing device according to claim 4 , further comprising an indicator member that indicates the release position. The opening and closing device according to claim 4 , wherein the release part is fixed in the non-release position.