Opening and closing body device structure

Abstract

To provide an opening and closing body device structure capable of improving fireproof performance of the opening and closing body device by protecting a wind-up cylinder from flame.SOLUTION: An opening and closing body device structure comprises: a first support shaft fixed to a first facing surface on one side and a second support shaft 35 fixed to a second facing surface on the other side in a width direction across an opening 15; a drive part that is cantilevered coaxially with the first support shaft so as to be rotatable; an assisting part that is cantilevered coaxially with the second support shaft 35 so as to be rotatable; and an aluminum wind-up cylinder 51 that coaxially fixes the drive part and the assisting part on the inner side and allows a shutter curtain 17 for opening and closing the opening 15 to be wound around an outer periphery. A base end on winding start side of an opening and closing body that fully closed the opening 15 is connected to the wind-up cylinder 51 through an opening and closing body connection part 61 made of fireproof material that is longer than an outer peripheral length of the wind-up cylinder 51 and covers the wind-up cylinder 51 over whole length along a shaft line of the wind-up cylinder 51.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a structure of an opening / closing body device. [Background technology]

[0002] The shutter device has a winding section whose both ends are supported by brackets on the building frame. The shutter curtain, which is the opening and closing body that opens and closes the opening of the building, is wound up on the winding section. If this winding section has a long shaft that runs along its entire length, it can have a structure in which both ends can be supported by bearings. However, if it has different mechanical parts on the same shaft, such as a drive part (electric mechanism) and an assist part (spring mechanism), whose rotations are not completely synchronized, it cannot have a common single-axis structure.

[0003] In such an opening / closing body device structure, the drive unit and the assisting unit are supported by one drive unit on one side of the building frame and the other assisting unit on the other side of the building frame, with their respective shaft ends fixed. The drive unit and the assisting unit, which are separated on the left and right, are fixed coaxially to the inside and integrally connected by a winding tube (also called a "winding drum") that winds the shutter curtain around its outer periphery. The winding tube is fixed to the drive unit and the assisting unit via wheels, and the drive rotational force and the assisting rotational force are transmitted to them, respectively.

[0004] This winding tube has an engagement structure that regulates the relative rotation with the multiple wheels fixed inside, so it has a complex cross-sectional shape rather than a simple cylinder.For this reason, the winding tube is made of aluminum, which allows for light weight and the ability to be given a complex cross-sectional shape (shape formability). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-214282 A (Fig. 1) Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the case of the opening and closing body device, when the shutter curtain is fully closed and a fire occurs, the shutter curtain, guide rail, storage section, etc. are made of fire-resistant materials such as steel, so they have a fire-resistant structure, but the above-mentioned winding tube is made of aluminum material for the purpose of weight reduction and shape formability, so it has low fire resistance against heat. In other words, when heat or flames enter the storage section from the slit-shaped shutter entrance and exit, when the fire-resistant shutter curtain is fully unrolled, that is, when the opening is fully closed, the winding tube is exposed and is directly exposed to heat. The winding tube may soften or even melt due to high heat, and since the drive section and the assist section are supported by a cantilever, the gravity-direction stress is concentrated near the center of the winding tube due to their own weight, causing the winding tube to buckle and bend, and in the worst case, the winding tube, the drive section, and the assist section may fall due to their own weight.

[0007] The present invention has been made in consideration of the above-mentioned situation, and its object is to provide a structure for an opening / closing body device that can protect the winding tube from heat such as fire, thereby improving the fire resistance of the opening / closing body device. [Means for solving the problem]

[0008] Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The structure of the opening / closing body device according to claim 1 of the present invention is a structure of an opening / closing body device comprising: a first support shaft 31 fixed to a first opposing surface 29 on one side of the opening 15 in the width direction; a second support shaft 35 fixed to a second opposing surface 33 on the other side; a drive section 41 supported by a cantilever so as to be coaxially rotatable on the first support shaft 31; an assist section 47 supported by a cantilever so as to be coaxially rotatable on the second support shaft 35; and a winding cylinder 51 which winds around an opening / closing body 17 that opens and closes the opening 15 with the drive section 41 and the assist section 47 fixed coaxially to the inside, The base end of the opening / closing body 17 on the winding start side, which fully closes the opening 15, is connected to the winding tube 51 via an opening / closing body connecting part 61 made of a fire-resistant material that is longer than the outer circumferential length of the winding tube 51 and covers the winding tube 51 over the entire length along the axis of the winding tube 51.

[0009] In the structure of this opening / closing body device, the base end of the opening / closing body (shutter curtain) 17 on the winding start side is connected to the winding tube 51 via an opening / closing body connecting part 61. The opening / closing body connecting part 61 is made of a fire-resistant material. The opening / closing body connecting part 61 is rectangular in shape and is large enough to cover the winding tube 51 over its entire length along the axis of the winding tube 51 and to cover the winding tube 51. When opening an opening 15 in a building, the opening / closing body 17, whose base end is fixed to the winding tube 51 via the opening / closing body connecting part 61, is wound onto the winding tube 51 starting from the opening / closing body connecting part 61, thereby fully opening the opening 15. On the other hand, when fully closing the opening 15, the wound opening / closing body 17 descends through the opening 15 with the seat plate 25 attached to the tip in the unwinding direction becoming the lowest end. The opening / closing body 17 fully closes the opening 15 when the seat plate 25 lands on the lower frame 27. The opening / closing body 17 that fully closes the opening 15 is connected to the winding tube 51 via the opening / closing body connecting part 61. The opening / closing body connecting part 61 is longer than the outer circumferential length of the winding tube 51, and is therefore wound around the winding tube 51 at least once. In addition, the opening / closing body connecting part 61 is long over the entire length along the axis of the winding tube 51, and therefore covers the entire circumference of the winding tube 51 without exposing it over the entire length when the opening 15 is fully closed. As a result, the fire resistance of the opening / closing body device (shutter device) 11 having an aluminum winding tube 51 is improved by wrapping the opening / closing body connecting part 61 made of a fire-resistant material around the winding tube 51 in excess, so that even when the opening / closing body 17 is in the fully closed state, the opening / closing body connecting part 61 covers the entire circumference of the winding tube 51 to protect the winding tube 51 from heat. Furthermore, if the drive unit (electric mechanism unit) 41 and the assist unit (spring unit) 47 lose the winding tube 51 connecting them, the boundary between them will bend, and the slat 19 constituting the opening / closing body 17 in the fully closed state of the opening 15 will bend. If the slat 19 bends, there is a risk that the end of the slat 19 will come out of the guide rail 13, and there is a risk that flames will penetrate between the slat 19 and the guide rail 13. In the structure of the opening / closing body device, the opening / closing body connecting part 61 covers the entire circumference of the winding tube 51 to protect it from heat, thereby not only preventing the winding tube 51 from bending or falling, but also reliably preventing the slats 19 from falling out of the guide rail 13. As a result, even when the opening / closing body 17 is in a fully closed state, the opening / closing body connecting portion 61, which is made of a fire-resistant material for connecting the opening / closing body 17 to the winding tube 51, is wrapped around the outer periphery of the winding tube 51 at least once over the entire length of the winding tube 51 to cover the winding tube 51, thereby protecting the winding tube 51 from the heat of a fire and improving the fire resistance performance of the opening / closing body device.

[0010] The structure of the opening / closing body device according to claim 2 of the present invention is a structure of an opening / closing body device comprising: a first support shaft 31 fixed to a first opposing surface 29 on one side of the opening 15 in the width direction; a second support shaft 35 fixed to a second opposing surface 33 on the other side; a drive section 41 supported by a cantilever so as to be coaxially rotatable on the first support shaft 31; an assist section 47 supported by a cantilever so as to be coaxially rotatable on the second support shaft 35; and a winding cylinder 51 which winds around an opening / closing body 17 that opens and closes the opening 15 with the drive section 41 and the assist section 47 fixed coaxially to the inside, The driving portion and the assisting portion are covered by the winding cylinder with a gap between the driving portion and the assisting portion. The base end of the opening / closing body 17 on the winding start side, which fully closes the opening 15, is connected to the winding tube 51 via an opening / closing body connecting part 61 made of a fire-resistant material that is longer than the outer circumferential length of the winding tube 51 and covers the winding tube 51 over the entire length along the axis of the winding tube 51.

[0011] In the structure of this opening / closing body device, even if the drive part 41 and the assisting part 47 are separated with a gap 53 between their respective tips, that is, even if they are not connected by a cantilever structure but have a gap 53 between them, the opening / closing body connecting part 61 made of a fire-resistant material is wrapped around the outer circumference at least once to cover the gap 53, thereby protecting the winding tube 51 from heat and flames caused by a fire, etc., and improving the fire resistance of the opening / closing body device.

[0012] The structure of an opening / closing body device according to claim 3 of the present invention is the structure of an opening / closing body device according to claim 1 or 2, The opening / closing body connecting portion 61 is characterized by being a plurality of slats 19 that constitute the opening / closing body 17.

[0013] In this opening / closing body device structure, the opening / closing body connecting part 61 is formed of multiple slats 19 that constitute the opening / closing body 17. In the opening / closing body device structure, the opening / closing body connecting part 61 made of a fire-resistant material is wound around the winding tube 51 on the hanging side, which is the winding start side of the opening / closing body 17. In other words, the fire-resistant material is the steel slats 19. The steel slats 19 have greater fire resistance than aluminum and do not melt easily. The opening / closing body connecting portion 61 may be an extension of the slat 19 constituting the opening / closing body 17. The same slat 19 may be used to completely cover the winding portion 23. That is, in this structure of the opening / closing body device, the opening / closing body 17 consisting of the slat 19 is wound around the winding tube 51 at least once. Therefore, when the opening / closing body is in a fully closed state, the slats 19 cover the entire circumference of the aluminum winding tube 51, protecting the winding tube 51. In this way, the multiple engaged slats 19 can block heat and flames caused by a fire, and the aluminum winding tube 51 will not be directly exposed to the fire. Even if high heat is transmitted and the aluminum winding tube 51 melts and disappears, the slats 19 on the outer periphery cover the entire circumference of the winding tube 51, so that the slats 19 run along the entire axial length of the winding tube 51 in a rolled-up shape and do not bend. In other words, each slat 19 that has been wound at least once maintains its cylindrical shape and supports the cantilevered drive unit 41 and assist unit 47 approximately straight on the outside. Thus, by winding the steel slats 19 around the aluminum winding tube 51 at least once, the fire resistance of the opening / closing body device can be improved.

[0014] The structure of an opening / closing body device according to claim 4 of the present invention is the structure of an opening / closing body device according to claim 1 or 2, The opening / closing body connecting portion 61 is characterized by being made of fireproof cloth 69.

[0015] In this opening / closing body device structure, the opening / closing body connecting part 61 is formed of a fire-resistant cloth 69. The fire-resistant cloth 69 is lightweight and flexible, so it can be easily wound around the winding tube 51. The fire-resistant cloth 69 can cover the outer circumferential direction of the winding tube 51 with a surface without any gaps. The opening / closing body connecting part 61 made of the fire-resistant cloth 69 can be thinner than the opening / closing body connecting part 61 in which multiple slats 19 are engaged and connected, so the outer diameter of the winding when wound around the outer periphery of the winding tube 51 can be smaller than that of the slats 19. Effect of the Invention

[0016] According to the structure of the opening / closing body device described in claim 1 of the present invention, even when the opening / closing body is in a fully closed state, the opening / closing body connecting portion made of a fire-resistant material for connecting the opening / closing body to the winding tube is wrapped around the outer periphery of the winding tube at least once over the entire length of the winding tube to cover the winding tube, thereby protecting the winding tube from heat and flames caused by a fire, etc., and improving the fire resistance of the opening / closing body device.

[0017] According to the structure of the opening / closing body device described in claim 2 of the present invention, even if the drive part and the assisting part are separated by a gap between their respective tips, that is, even if they are not connected by a cantilever structure but have a gap between them, the opening / closing body connection part made of a fire-resistant material is wrapped around the outer periphery of the gap at least once to cover it, thereby protecting the winding tube from heat and flames caused by a fire, etc., and improving the fire resistance of the opening / closing body device.

[0018] According to the structure of the opening / closing body device described in claim 3 of the present invention, the opening / closing body connecting part is made of a slat which is a fire-resistant opening / closing body component, so that by wrapping the opening / closing body connecting part around the outer periphery of the winding tube at least once, the slat covers the entire circumference of the winding tube even in the fully closed state, thereby protecting the winding tube from heat.

[0019] According to the structure of the opening / closing body device described in claim 4 of the present invention, the opening / closing body connecting part is made of flexible fire-resistant cloth, making it easier to handle than slats and easier to wind around a winding tube, and since it is thin, it is possible to suppress an increase in the winding diameter. [Brief description of the drawings]

[0020] [Figure 1] 1 is an external perspective view of an opening / closing body device having a structure of an opening / closing body device according to an embodiment of the present invention. [Diagram 2] 1 is a front view showing a portion of the winding section housed in the storage case, with a cutaway view. FIG. [Diagram 3] 3 is a side cross-sectional view of the winding section shown in FIG. 2. [Figure 4] 13 is a side cross-sectional view of a take-up part illustrating the structure of an opening / closing body device according to Modification 1 in which the shutter curtain is rolled inward. FIG. [Diagram 5] 13 is a side cross-sectional view of a take-up part, illustrating the structure of an opening / closing body device according to modified example 2 in which the opening / closing body connecting part is made of fire-resistant cloth. FIG. [Figure 6] 13 is a side cross-sectional view of a take-up portion, illustrating the structure of an opening / closing body device according to Modification 3 in which the opening / closing body connecting portion is a grill portion. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of an opening / closing body device having a structure of an opening / closing body device according to this embodiment. The structure of the opening / closing body device according to this embodiment is suitable for use in a shutter device 11, which is an opening / closing body device. The shutter device 11 is installed in an opening 15 of a building having a pair of guide rails 13 on the left and right. The shutter device 11 includes a shutter curtain 17, which is an opening / closing body, as a constituent member. The shutter curtain 17 is guided so as to be able to move up and down freely in the opening 15 by inserting both sides in the width direction of the opening 15 into the pair of guide rails 13.

[0022] The shutter curtain 17 is formed by connecting a plurality of slats 19, each long and narrow in the width direction of the opening 15, in the opening / closing direction (vertical direction) of the opening 15. The slats 19 are made of steel, which is a fireproof material. The upper and lower parts of the slats 19 are formed with connecting parts that can engage with each other, i.e., curled parts. The shutter curtain 17 connects the slats to each other so that they can be bent vertically with the upper and lower curled parts as joint parts by engaging the lower curled part of the upper slat with the upper curled part of the lower slat, moving them along the slat extension direction, and slidingly engaging them from the lateral direction. For example, the edge of the upper curled part of the slats is cut into a substantially L-shape to form a cutout part, and the lower curled part has a cutout part formed inside the part corresponding to the cutout part. The end of the lower curled part with the cutout part is bent inward and crimped to prevent the slats from moving horizontally.

[0023] The shutter device 11 is provided with a storage case 21 above the opening 15. The storage case 21 houses a winding section 23 (see FIG. 2) constituting a winding mechanism. The winding section 23 is driven by an electric motor (not shown) and winds and unwinds the shutter curtain 17 to raise and lower (open and close). The shutter curtain 17 wound up by the winding section 23 is unwound and wound down from the outer diameter side of the winding. The shutter curtain 17 has a seat plate 25 at the opening and closing tip. The seat plate 25 is connected to the lower end, which is the tip of the shutter curtain 17, by a seat plate connecting slat at the lowest end having a seat plate connecting structure. When the shutter curtain 17 fully closes the opening 15, the seat plate 25 lands on a lower frame 27 of the opening frame provided in the opening 15 or on the floor surface of the opening 15.

[0024] FIG. 2 is a front view of the winding section 23 housed in the storage case 21 with a portion cut away. The opening / closing body device has a structure including a first support shaft 31 fixed to a first opposing surface 29 on one side of the opening 15 in the width direction, and a second support shaft 35 fixed to a second opposing surface 33 on the other side. The first opposing surface 29 and the second opposing surface 33 are, for example, inner wall surfaces facing each other on the inside of a pair of brackets 37 protruding from the building structure on the left and right sides of the upper edge of the opening 15. The first support shaft 31 and the second support shaft 35 are each fixed non-rotatably to a bearing 39 attached to the building structure via the bracket 37.

[0025] The first support shaft 31 is the shaft of an electric mechanism 41 which is the drive section, and this electric mechanism 41 is supported by a bearing 39 in a cantilevered manner. The electric mechanism 41 houses an opening / closing device 43 which is a combination of an electric motor and a brake. The brake detects when the shutter curtain 17 reaches the fully open or fully closed position using a detection sensor or the like, and stops the electric motor from rotating based on this detection signal. The opening / closing device 43 is provided with an output wheel 45 which rotates by the output of the electric motor.

[0026] On the other hand, the second support shaft 35 is the shaft portion of a spring unit 47 which is an assisting portion, and this spring unit 47 is cantilevered by a bearing 39. The spring unit 47 is configured to include a wheel 46 which is rotatably supported on the non-rotating second support shaft 35, and a return spring 49 which is a torsion coil spring connected to the wheel 46 and the second support shaft 35.

[0027] The opening / closing body device has a structure including a winding tube 51 to which the electric mechanism 41 and the spring unit 47 are coaxially fixed on the inside. The shutter curtain 17 that opens and closes the opening 15 is wound around the outer periphery of the winding tube 51. The winding tube 51 is formed of a long cylinder that extends across the width of the opening 15. The inside of the winding tube 51 is a storage space that stores the electric mechanism 41 and the spring unit 47. The center of the winding tube 51 is a gap 53 where the electric mechanism 41 and the spring unit 47 are spaced apart, with the tips of the electric mechanism 41 and the spring unit 47 facing each other. This gap 53 is covered only by the winding tube 51.

[0028] In the electric mechanism 41, the output wheel 45 driven by the opening / closing device 43 is connected to the winding tube 51 by a rivet 55 or the like. In the spring unit 47, the return spring 49 has one end 81 connected and fixed to the second support shaft 35 and the other end 83 connected and fixed to the wheel 46.

[0029] FIG. 3 is a side cross-sectional view of the winding section 23 shown in FIG. A plurality of grooves 57 extending along the axis of the winding tube 51 are formed in the circumferential direction in the wheel 46 of the spring unit 47. A plurality of protrusions 59 protruding radially inward from the inner surface are formed in the circumferential direction in the winding tube 51. The wheel 46 and the winding tube 51 are adapted to transmit the rotational force from the spring unit 47 by engaging the grooves 57 and the protrusions 59.

[0030] In the structure of the opening / closing body device, the winding tube 51 rotates around the non-rotating first support shaft 31 by the rotational driving force of the electric mechanism 41, and when the shutter curtain 17 is unwound, a return spring force is stored in the spring unit 47. This return spring force is used as an auxiliary force when the electric mechanism 41 rotates in the reverse direction to wind up the shutter curtain 17.

[0031] The winding tube 51 has a complex cross-sectional shape with a plurality of protrusions 59 that are engaged with the wheel 46, and is therefore made of aluminum for the purposes of reducing weight and improving shape formability.

[0032] The structure of the opening / closing body device is such that an opening / closing body connecting part 61 made of a fireproof material that is longer than the outer circumferential length of the winding tube 51 and covers the winding tube 51 over the entire length along the axis of the winding tube 51 is connected to the base end of the winding start side of the shutter curtain 17 that fully closes the opening 15. One end of the opening / closing body connecting part 61 is connected to the base end of the winding start side of the shutter curtain 17. The other end of the opening / closing body connecting part 61 is fixed to the outer circumferential surface of the winding tube 51 with a plurality of bolts 63 at predetermined intervals in the axial direction and connected to the winding tube 51. In other words, the shutter curtain 17 is connected to the winding tube 51 via the opening / closing body connecting part 61.

[0033] In this embodiment, the opening / closing body connecting portion 61 is the same slat 19 as the slat 19 constituting the shutter curtain 17, and is composed of a plurality of these slats 19. In other words, the opening / closing body connecting portion 61 is formed by further connecting the slat 19 to the start side of the roll of the shutter curtain 17. In the structure of the opening / closing body device, in the opening fully closed state in which the seat plate 25 is placed on the lower frame 27, the slat 19 on the start side of the roll of the shutter curtain 17 is wound around the outer periphery of the winding tube 51 at least once in the range Kr of the opening / closing body connecting portion 61. More specifically, the opening / closing body connecting portion 61 is composed of a plurality of slats 19, for example, about 2 to 3 more than in the conventional case, that is, about 8 slats 19 in total, and is wound around the outer periphery of the winding tube 51 so as to cover and hide the outer periphery of the winding tube 51.

[0034] In the structure of the opening / closing body device, the left side of the opening 15 in Fig. 3 is the outdoor side 65, and the right side is the indoor side 67. In this case, the shutter curtain 17 is called outwardly wound. In the outwardly wound state, the slats 19 wound around the upper semicircle of the winding tube 51 move toward the outdoor side to be wound.

[0035] FIG. 4 is a side cross-sectional view of a winding section 23, illustrating the structure of an opening / closing body device according to Modification 1 in which the shutter curtain 17 is rolled inward. The opening / closing body device may have an inward winding structure. In the inward winding structure, the slat 19 wound around the upper semicircle of the winding tube 51 moves toward the indoor side, and is wound up. Even in this case, the shutter curtain 17 is wound so that the slat 19 on the winding start side is wound around the outer periphery of the winding tube 51 at least once in the range Kr of the opening / closing body connecting part 61, and covers and conceals the outer periphery of the winding tube 51.

[0036] FIG. 5 is a side cross-sectional view of the winding portion 23, illustrating the structure of an opening / closing body device according to Modification 2 in which the opening / closing body connecting portion 61 is a fireproof cloth 69. The opening / closing body device may have a structure in which the opening / closing body connector 61 is a fireproof cloth 69 having fire resistance, fire prevention, and flame retardancy. The fireproof cloth 69 is formed in a soft, flame-retardant sheet shape having a thickness of, for example, about 1 mm. The fireproof cloth 69 may be made of a single material such as a metal net screen, silica cloth, or glass cloth, or may be made of a composite or laminated material of these materials.

[0037] One end of the fireproof cloth 69 is fixed to the base end of the shutter curtain 17 by fastening members such as a plurality of rivets 55 spaced at a predetermined interval in the width direction, and the other end is fixed to the outer circumferential surface of the winding tube 51 by fastening members such as a plurality of bolts 63 spaced at a predetermined interval in the axial direction. Even in this case, the fireproof cloth 69 is wound around the outer circumferential surface of the winding tube 51 at least once in the range Kr where the winding start side becomes the opening / closing body connecting portion 61, so that the outer circumferential surface of the winding tube 51 is covered and concealed.

[0038] FIG. 6 is a side cross-sectional view of the winding section 23, illustrating the structure of an opening-closing body device according to Modification 3 in which the opening-closing body connecting section 61 is replaced with a grill section 71. As shown in FIG. The opening / closing body device may have a structure in which the opening / closing body connecting portion 61 is a grill portion 71. The grill portion 71 has a configuration equivalent to that constituting a so-called grill shutter curtain, and is configured by connecting a plurality of small-diameter, long pipe materials 73 extending over the entire length along the axis of the winding tube 51 at intervals in the winding direction via rectangular connecting links 75, and the connecting links 75 are configured in plurality in the longitudinal direction of the pipe materials 73. The connecting links 75 may have a curved shape as shown in the figure, or may be straight plate materials.

[0039] In addition, the structure of the opening / closing body device may be a combination of the above-mentioned configuration examples as other modified examples. For example, if the fireproof cloth 69 is wound around the first turn and the slats 19 are wound around the second turn, the fireproof cloth 69 will be in close contact with the winding tube 51, improving the fireproof performance and improving the rigidity of the slats 19. Also, if the fireproof cloth 69 is wound around the first turn and the grill section 71 is wound around the second turn, the rigidity of the grill section 71 can be given a shielding function against heat such as fire. In this case, the grill section can supplement the flexibility of the fireproof cloth 69, and the fireproof cloth 69 can supplement the flame shielding property of the grill section. Furthermore, if the fireproof cloth 69 and the slats 19, or the fireproof cloth 69 and the grill section 71 are overlapped to form the opening / closing body connecting section 61 within the illustrated range Kr, that is, if the above-mentioned configuration examples of different materials are configured in an overlapping state within the length of the range Kr, it becomes possible to complete the winding around the winding tube 51 in one turn instead of two turns.

[0040] Next, the operation of the above-mentioned configuration will be described.

[0041] In the structure of the opening / closing body device according to this embodiment, the base end of the shutter curtain 17 on the winding start side is connected to the winding tube 51 via the opening / closing body connecting part 61. The opening / closing body connecting part 61 is made of a fire-resistant material. The opening / closing body connecting part 61 is rectangular in shape and is large enough to cover the winding tube 51 over its entire length along the axis of the winding tube 51 and to cover the winding tube 51.

[0042] When opening an opening 15 of a building, the shutter curtain 17, whose base end is fixed to the winding tube 51 via the opening / closing body connecting part 61, is wound up around the winding tube 51 starting from the opening / closing body connecting part 61, thereby fully opening the opening 15. On the other hand, when fully closing the opening 15, the rolled up shutter curtain 17 descends through the opening 15 with the seat plate 25 attached to the tip in the unwinding direction becoming the lowest end. The shutter curtain 17 fully closes the opening 15 when the seat plate 25 lands on the lower frame 27 or the floor.

[0043] The shutter curtain 17 that fully closes the opening 15 is connected to the winding tube 51 via the opening / closing body connecting part 61. The opening / closing body connecting part 61 is longer than the outer circumferential length of the winding tube 51, so it remains wound around the winding tube 51 for at least one revolution. In addition, the opening / closing body connecting part 61 is long over the entire length along the axis of the winding tube 51, so that even when the opening is fully closed, the opening / closing body connecting part 61 covers the entire circumference of the winding tube 51 without exposing it over the entire length.

[0044] As a result, the fire resistance of the shutter device 11 having an aluminum winding tube 51 is improved by wrapping the opening / closing body connecting part 61 made of a fire-resistant material around the winding tube 51 in excess, so that even when the opening of the shutter curtain 17 is fully closed, the opening / closing body connecting part 61 covers the entire circumference of the winding tube 51 to protect the winding tube 51 from heat.

[0045] In addition, if the winding tube 51 bends under its own weight at the boundary between the electric mechanism 41, which is the driving section, and the spring unit 47, which is the assisting section, that is, at the gap 53 between their respective tips, the slats 19 constituting the shutter curtain 17 will bend. If the slats 19 bend, the ends of the slats 19 may come off the guide rails 13, and flames or heat from a fire may penetrate between the slats 19 and the guide rails 13. In contrast, in the structure of the opening / closing body device of the present invention, the opening / closing body connecting part 61 covers the entire circumference of the winding tube 51 to protect it from flames and heat, so that in addition to preventing the winding tube 51 from bending or falling, it is also possible to reliably prevent the slats 19 from coming off the guide rails 13.

[0046] As a result, even when the shutter curtain 17 is in a fully closed state, the opening / closing body connecting portion 61, which is made of a fire-resistant material for connecting the shutter curtain 17 to the winding tube 51, is wrapped around the outer periphery of the winding tube 51 at least once over the entire length of the winding tube 51, covering the winding tube 51, thereby protecting the winding tube 51 from flames and heat caused by a fire, thereby improving the fire resistance of the shutter device 11.

[0047] In addition, in the structure of this opening / closing body device, the opening / closing body connector 61 is formed of multiple slats 19 that constitute the shutter curtain 17. In the structure of the opening / closing body device, the opening / closing body connector 61 made of a fire-resistant material is wound around the winding tube 51 on the hanging side, which is the side where the shutter curtain 17 begins to roll up. In this example, the fire-resistant material is the steel slats 19. The steel slats 19 are more fire resistant than aluminum and will not melt.

[0048] The opening / closing body connecting portion 61 may be configured as an extension of the slats 19 constituting the shutter curtain 17. The same slats 19 may be used to cover the winding portion 23. That is, in this structure of the opening / closing body device, the shutter curtain 17 consisting of the slats 19 is wound around the winding tube 51 in excess.

[0049] In the past, shutter devices were constructed by reducing the number of parts, so there were no slats that could be wound around the winding tube, and when the shutter curtain was fully closed, the winding tube was exposed inside the storage case, resulting in insufficient fire prevention measures.

[0050] In the opening / closing body connecting portion 61 according to this embodiment, when the shutter curtain 17 is in the fully closed state, the slats 19 are configured to be several more than in the conventional case, and the slats 19 cover the entire circumference of the aluminum winding tube 51, protecting it without exposing it. In this way, the several engaged slats 19 can block flames and heat caused by a fire, and the aluminum winding tube 51 will not be directly exposed to the fire.

[0051] Even if the aluminum winding tube 51 melts and disappears due to high heat, the slats 19 on the outer periphery cover the entire circumference of the winding tube 51, so that the slats 19 run through the entire axial length of the winding tube 51 in a rolling pin shape and do not bend as the winding section 23. In other words, the slats 19 maintain their cylindrical shape and support the cantilevered driving section 41 and the assisting section 47 almost straight on the outside. Thus, by winding the steel slats 19 around the aluminum winding tube 51 at least once, the fireproof performance of the shutter device 11 can be improved. As a result, even in the fully closed state, the slats 19, which are the opening / closing body connecting section 61, cover the entire circumference of the winding tube 51, and can protect the winding tube 51 from fire and heat.

[0052] Even if the slats 19 themselves become hot and the aluminum winding tube 51 melts due to the slats 19 acting as a heat source, the slats 19 maintain their cylindrical shape because they are wound around the tube at least once, and as a result, the aluminum from which the winding tube 51 is made will not melt.

[0053] Furthermore, in this opening / closing body device structure, the opening / closing body connecting part 61 may be formed of a fire-resistant cloth 69. The fire-resistant cloth 69 is lightweight and flexible, and therefore can be easily wound around the winding tube 51. Moreover, the fire-resistant cloth 69 can cover the outer circumferential direction of the winding tube 51 with a surface without any gaps. The fire-resistant cloth 69 is a component material that is also used for fire shutters, and is a flexible cloth product made of a fabric that is resistant to fire and heat. The opening / closing body connecting part 61 in the opening / closing body device structure is formed using this material.

[0054] Since the opening / closing body connecting part 61 made of the fire-resistant cloth 69 can be thinner than the opening / closing body connecting part 61 in which a plurality of slats 19 are engaged and connected, the outer diameter of the winding when wound around the outer periphery of the winding tube 51 can be made smaller than that of the slats 19. As a result, since the opening / closing body connecting part 61 is made of the flexible fire-resistant cloth 69, it is easier to handle than the slats 19 and can be easily wound around the winding tube 51, preventing the winding diameter from becoming too large.

[0055] Furthermore, in the structure of this opening / closing body device, the opening / closing body connecting part 61 may be a grill part 71. The grill part 71 connects a plurality of small-diameter, long pipe materials 73 extending over the entire length along the axis of the winding tube 51 at intervals in the winding direction via rectangular connecting links 75. In other words, the opening / closing body connecting part 61 may not cover the winding tube 51 with a surface, but may wrap a fully-running pipe such as a grill shutter curtain around the winding tube 51 at intervals to keep the winding tube 51 straight.

[0056] The structure of the opening / closing body device using the grill section 71 in the opening / closing body connecting section 61 does not block flames from a fire that strikes the winding tube 51, but even if the aluminum winding tube 51 melts and disappears due to heat, the pipe material 73 on its outer periphery surrounds the entire circumference of the winding tube 51, so that the pipe material 73 passes through the axial direction of the winding tube 51 in a rolling pin shape and does not bend as the winding section 23. In other words, the pipe material 73 maintains a cylindrical basket shape and supports the cantilevered drive section 41 and assisting section 47 almost straight.

[0057] In this way, the fireproof performance of the shutter device 11 can be improved by winding the grill section 71 made of the steel pipe material 73 at least once around the aluminum winding tube 51. As a result, the opening / closing body connecting section 61 is wound around the outer periphery of the winding tube 51 in a rolling pin shape, and the opening / closing body connecting section 61 maintains a substantially straight cage structure and outer shell structure along the axis of the winding tube 51, and even if the winding tube 51 melts due to heat, bending of the winding section 23 between the cantilevered driving section 41 and the assisting section 47 can be prevented.

[0058] Therefore, according to the structure of the opening / closing body device of this embodiment, even when the shutter curtain 17 is in a fully closed state, the opening / closing body connection part 61, which is made of a fire-resistant material for connecting the shutter curtain 17 to the winding tube 51, is wrapped around the outer periphery of the winding tube 51 at least once over the entire length of the winding tube 51 to cover the winding tube 51, thereby protecting the winding tube 51 from flames and heat caused by a fire and improving the fire resistance of the shutter device 11. [Explanation of symbols]

[0059] 11...Opening and closing device (shutter device) 15…Opening 17...Opening and closing body (shutter curtain) 19…Slat 29…First opposing surface 31...1st spindle 33…Second opposing surface 35…Second spindle 41...Drive unit (electric mechanism unit) 47...Assisting part (spring unit) 51…Winding cylinder 53...Void 61...Opening and closing body connection part 69…Fireproof cloth

Claims

1. A structure of an opening / closing body device comprising: a first support shaft fixed to a first opposing surface on one side of an opening in a width direction; a second support shaft fixed to a second opposing surface on the other side; a drive section supported by a cantilever so as to be coaxially rotatable on the first support shaft; an assist section supported by a cantilever so as to be coaxially rotatable on the second support shaft; and a winding cylinder which winds an opening / closing body around an outer periphery thereof, the opening / closing body having the drive section and the assist section fixed coaxially to the inside, A structure of an opening / closing body device, characterized in that the base end of the opening / closing body at the start of winding, which completely closes the opening, is connected to the winding tube via an opening / closing body connecting part made of a fire-resistant material that is longer than the outer circumferential length of the winding tube and covers the winding tube along the entire length along the axis of the winding tube.

2. A structure of an opening / closing body device comprising: a first support shaft fixed to a first opposing surface on one side of an opening in a width direction; a second support shaft fixed to a second opposing surface on the other side; a drive section supported by a cantilever so as to be coaxially rotatable on the first support shaft; an assist section supported by a cantilever so as to be coaxially rotatable on the second support shaft; and a winding cylinder which winds an opening / closing body around an outer periphery thereof, the opening / closing body having the drive section and the assist section fixed coaxially to the inside, The driving portion and the assisting portion are covered by the winding cylinder with a gap between the driving portion and the assisting portion. A structure of an opening / closing body device, characterized in that the base end of the opening / closing body at the start of winding, which completely closes the opening, is connected to the winding tube via an opening / closing body connecting part made of a fire-resistant material that is longer than the outer circumferential length of the winding tube and covers the winding tube along the entire length along the axis of the winding tube.

3. 3. The opening / closing body device structure according to claim 1, wherein the opening / closing body connecting portion is a plurality of slats that constitute the opening / closing body.

4. 3. The opening / closing body device structure according to claim 1, wherein the opening / closing body connecting portion is made of fireproof cloth.

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