Fire prevention structure of winding assembly

Abstract

Improves the fire resistance of the winding assembly. [Solution] The winding assembly 1 consists of a winding body to which a shutter curtain 2 is attached and around which the shutter curtain is wound, and an opening / closing device M that is housed within the winding body and rotates the winding body. An opening 16 is formed on the outer periphery of the winding body facing the opening / closing device M, and a steel cover 6 is provided on the winding body so as to cover the circumferential portion of the winding body and block at least part of the opening 16. The upper end portion of the shutter curtain 2 has a plurality of excess slats 20', and when the opening is fully closed, the steel cover 6 is located on the outer periphery of the lower side of the winding body and the excess slats 20' are located on the outer periphery of the upper side of the winding body, so that the opening 16 around the opening / closing device M is covered by the steel cover 6 and the excess slats 20'.

Description

[Technical Field]

[0001] The present invention relates to a shutter curtain winding assembly, and more particularly to a fire-resistant structure for the winding assembly. [Background technology]

[0002] A winding assembly is known that comprises a winding body that winds up a shutter curtain and an opening / closing mechanism built into the winding body (see Patent Document 1). Among such winding assemblies with a built-in opening / closing mechanism, there are known ones in which the winding body is formed from a plurality of wheels and a plurality of stays, and ones in which the winding body is formed from a cylindrical member with a wall body, but in the former case, the winding body has a plurality of gaps or openings.

[0003] In a reel with gaps or openings, if the heat of a fire causes a fire to break out in the opening / closing mechanism (containing elements such as oils or resins such as grease) inside the reel, the flames can easily spread through the gaps in the reel and into the shutter case, and the flames can then pass through the opening at the bottom of the shutter case (the gap with the slats) and spread to the outside of the shutter case (the non-fire side).

[0004] This will be explained in detail with reference to Figure 12. As shown in Figure 12, the bottom surface 213 of the recess of the hanging base 21 is located at the top of the winding body, and the hanging base 21 is located in the quadrant above the outer periphery of the winding body and on the body side. The uppermost slat 20 is connected to the interlock connection portion 210 at the lower end of the hanging base 21. When the opening is fully closed, the slat 20 extends downward from the hanging base 21 and further downward from the opening C3 at the lower end of the shutter case C. In Figure 12, when the opening is fully closed, the shutter curtain 2 divides the space into a first space α and a second space β. The space inside the shutter case C includes a space γ1 between the slat 20 in the shutter case C and the body W, and a space γ2 between the front portion C2 of the shutter case C and the winding assembly, and the spaces γ1 and γ2 are connected via a space γ3 between the upper surface portion C1 of the shutter case C and the winding assembly. Assuming that a fire breaks out outside the shutter case C (first space α), the winding body assembly may be heated by the heat of the fire through the shutter case C, and may ignite from the opening / closing mechanism M of the winding assembly. In this case, flames breaking out from the opening along the quadrant of the winding body where the hanging point 21 is located may pass through the space γ1 between the slat 20 inside the shutter case C and the body W, and may spread to the second space β (non-fire side) from between the opening at the bottom end of the shutter case C and the shutter curtain 2.

[0005] Patent document 1 discloses a cover body that is placed in an opening formed in the drum (with dimensions that allow the opening / closing device to be incorporated), but a window portion is formed between the cover body and the opening to allow heat to be dissipated from the opening / closing device, and since the window portion becomes a passageway for flames, there is a risk of a fire breaking out on the non-fire side. [Patent Document 1] Patent Publication No. 7-229379 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0006] The present invention aims to improve the fire resistance of a winding assembly. [Means for solving the problem]

[0007] The technical means adopted by the present invention to solve such problems are as follows: a winding body to which the shutter curtain is attached and around which the shutter curtain is wound; an opening / closing mechanism that is installed inside the winding body and rotates the winding body; In a winding assembly consisting of An opening is formed on the outer periphery of the winding body so as to face the opening and closing device, a steel cover is provided on the winding body so as to cover a circumferential portion of the winding body and close at least a portion of the opening; The upper end portion of the shutter curtain has a plurality of excess slats, When the opening is fully closed, the steel cover is positioned on the outer periphery of the lower side of the winding body, and the excess slats are positioned on the outer periphery of the upper side of the winding body, so that the opening around the opening / closing device is covered by the steel cover and the excess slats. It is a fireproof structure for a winding assembly.

[0008] In one embodiment, the winding body is a fixed shaft that rotatably supports the winding body; a plurality of wheels rotatably mounted on the fixed shaft at intervals in the longitudinal direction; a plurality of stays extending in the longitudinal direction so as to bridge the plurality of wheels; It consists of The opening is part of a gap formed between the wheels and the stays.

[0009] In one embodiment, some of the wheels are located on both sides of the opening and closing device, When the opening is fully closed, the periphery of the opening / closing mechanism is blocked by the steel cover, the excess slats, and wheels located on both sides of the opening / closing mechanism.

[0010] In one embodiment, the winding body is provided with a pair of suspension points located on both sides of the opening and closing device, and the steel cover is fixed to the pair of suspension points. In one embodiment, the suspension points are fixed to wheels located on both sides of the opening and closing machine. In this embodiment, the steel cover is located at approximately the same position as the suspension point when viewed from the side of the winding body.

[0011] In one embodiment, an inspection hatch can be formed by removing a portion of the steel cover. In one embodiment, a portion including the front portion of the shutter case is removable, and by removing this portion, the steel cover portion can be removed to form an inspection hatch. [Effects of the Invention]

[0012] In this invention, a winding assembly comprises a winding body to which a shutter curtain is attached and around which the shutter curtain is wound, and an opening / closing device that is housed within the winding body and rotates the winding body, and an opening formed on the outer periphery of the winding body facing the opening / closing device.When the opening is fully closed, a steel cover is positioned on the outer periphery of the lower side of the winding body, and excess slats are positioned on the outer periphery of the winding body, and the opening around the opening / closing device is covered by the steel cover and the excess slats.Therefore, even if the opening / closing device ignites during a fire, the flames are prevented from passing through the space inside the shutter case and spreading to the non-fire side, thereby improving the fire resistance of the winding assembly. [Brief explanation of the drawings]

[0013] [Figure 1A] 1 is a front view of a shutter device equipped with a winding assembly according to a first embodiment (equipped with a steel cover according to a first example). FIG. [Figure 1B] FIG. 10 is a front view of a shutter device (equipped with the steel cover according to the first embodiment) equipped with a winding assembly according to a second embodiment. [Figure 2A] 1 is a vertical cross-sectional view of a shutter device equipped with a winding assembly according to a first embodiment (equipped with a steel cover according to a first example). FIG. [Figure 2B]FIG. 10 is a vertical cross-sectional view of a shutter device (equipped with the steel cover according to the first embodiment) equipped with a winding assembly according to a second embodiment. [Figure 3A] The left figure is a cross-sectional view taken along the line A in FIG. 1A, and the right figure is a cross-sectional view taken along the line B in FIG. [Figure 3B] The left figure is a cross-sectional view taken along the line A in FIG. 1B, and the right figure is a cross-sectional view taken along the line B in FIG. [Figure 4] 3A is a diagram showing a winding assembly with a steel cover attached according to the first embodiment, and is a diagram for convenience showing the steel cover and the hanging point as viewed from the arrow D (left diagram of FIG. 3A). FIG. [Figure 5] FIG. 2 is a front view of the steel cover according to the first embodiment. [Figure 6] FIG. 2 is a side view of the steel cover according to the first embodiment. [Figure 7] 1A and 1B are a front view and a longitudinal sectional view of a cover body of a steel cover according to a first embodiment. [Figure 8] FIG. 10 is a front view of a steel cover according to a second embodiment. [Figure 9] FIG. 10 is a side view of a steel cover according to a second embodiment. [Figure 10] 10A and 10B are diagrams illustrating the formation of an inspection hatch in a steel cover according to a second embodiment. [Figure 11] FIG. 2 is a diagram showing the winding assembly according to the present embodiment (in a state before the steel cover is attached). [Figure 12] FIG. 1 is a diagram showing a conventional winding assembly. DETAILED DESCRIPTION OF THE INVENTION

[0014] [A] Overall structure of the shutter 1A and 1B are front views of the shutter device from the second space β side (the shutter case C is cut away to show the interior), and 2A and 2B are longitudinal cross-sectional views of the shutter device with the opening fully closed. FIGS. 1A and 2A show a shutter device equipped with a winding assembly according to a first embodiment, and 1B and 2B show a shutter device equipped with a winding assembly according to a second embodiment. This specification discloses two embodiments of a winding assembly with improved fire resistance. Both the first and second embodiments share the use of a steel cover as a component, and this specification discloses a first example (FIGS. 5 to 7) and a second example (FIGS. 8 to 10) of the steel cover.

[0015] As shown in Figures 1A, 1B, 2A, and 2B, the shutter device includes a shutter case C located above the opening and attached to the exterior wall (body) W in a corrugated manner, left and right guide rails 4 located on both sides of the opening in a corrugated manner relative to the exterior wall W, a center post 5 erected in the center of the opening in the width direction, a pair of winding assemblies 1 supported by brackets B located at the width ends of the shutter case C and intermediate brackets B' located in the center of the width direction, and a pair of shutter curtains 2 whose upper ends are connected to the winding assemblies 1 and which are wound / unwound by the winding assemblies 1, with their widthwise ends raised and lowered while being guided by the guide rails 4 and the center post 5 to open and close the opening. When the opening is fully closed, the seat plate 3 at the bottom of the shutter curtain 2 rests on the floor FL. The center post 5 is movable and, when moved to a predetermined position, is fixed to the floor FL by a lifting / lowering rod 50. In this embodiment, when the opening is fully closed, the shutter curtain 2 divides the opening into a first space (outdoor space) α and a second space (indoor space) β.

[0016] In the embodiment shown in Figure 2, the bracket B and shutter case C that support the longitudinal ends of the winding assembly 1 are attached in a protruding manner to the second space β side of the main body W, but depending on the fit of the shutter device, the bracket B and shutter case C may be attached in a protruding manner to the first space α (outdoor space) side of the main body W (Figure 12).

[0017] The shutter device according to this embodiment is an electric shutter, and each retractable assembly 1 is equipped with an opening / closing mechanism M, which rotates the retractable assembly 1 to open and close the opening with the shutter curtain 2. The shutter device according to this embodiment is a so-called multi-unit shutter device, and the opening, which is divided into left and right halves by a center post 5, is opened and closed with each shutter curtain 2. Note that the present invention is not limited to multi-unit shutter devices, and the configuration of the retractable assembly 1 according to this embodiment is also applicable to a general shutter device in which both longitudinal ends are supported by left and right brackets, and both widthwise ends of the shutter curtain are guided by left and right guide rails.

[0018] [B] Shutter curtain 1A, 1B, 2A, and 2B, the shutter curtain 2 is formed by connecting long, plate-like slats 20 having a predetermined height and extending in the width direction of the opening so that they can rotate in the height direction. The slats 20 have a width dimension such that both longitudinal ends extend into the internal space of the guide rail 4 and center post 7, and when the shutter curtain 2 is raised or lowered or when the opening is fully closed, one of both widthwise end portions of the slats 20 is received in the guide groove of the guide rail 4 and the other in the guide groove of the center post 5. Interlocking connecting portions 200, 201 are formed on the upper and lower ends of the surface portion of the slats 20, and the shutter curtain 2 is formed by interlocking multiple slats 20 with each other, and a base plate 3 is connected to the lower slat 20, and the upper end of the shutter curtain 2 is connected to the winding assembly 1 via a hanging point 21.

[0019] The hanging point 21 has the same configuration as a conventional hanging point, and the hanging point 21 according to this embodiment will be described with reference to Figures 2A, 2B, and 12 which shows the conventional hanging point 21. The hanging point 21 is an arc-shaped element extending in the circumferential direction of the winding assembly body 1, and has an interlock connection part 210 formed at one end side (lower end side) in the height direction, which is connected to the interlock connection part 200 on the upper side of the uppermost slat 20 (the side farthest from the seat panel 3).

[0020] As shown in Figure 12, the suspension point 21 has a surface portion that forms an arc-shaped outer surface 211, and arc-shaped inner surfaces 212, 213 are formed on the bottom surfaces of two recesses formed in the surface portion, and the arc-shaped inner surfaces 212, 213 are abutted against the peripheral surface of the winding assembly 1 (wheel 13), and the inner surface 213 and the winding assembly 1 (wheel 13) are fixed with a fastening member 214, thereby connecting the suspension point 21 to the winding assembly 1.

[0021] [C] Winding assembly solid As shown in Figures 1A, 1B and 11, the winding assembly 1 comprises a winding body to which the shutter curtain 2 is attached via a hanger 21, and an opening / closing device M that is housed within the winding body and rotates the winding body, so that the shutter curtain 2 is wound around the outer periphery of the winding body. Note that the hanger 21 may also be treated as a component of the winding assembly 1. The shutter device according to this embodiment is a twin-mounted type, and a pair of winding assembly assemblies 1 are arranged in series within the shutter case C. One of the winding assembly assemblies 1 will be described below, but the description can be used to describe the other winding assembly 1.

[0022] The winding body consists of a fixed shaft 10 and a main body supported rotatably on the fixed shaft 10. One end of the fixed shaft 10 is fixed to bracket B, and the other end is fixed to intermediate bracket B'. In a single-mounted shutter device (not equipped with an intermediate bracket), both ends of the fixed shaft are supported by the left and right brackets.

[0023] The main body of the winding body consists of a plurality of wheels (end wheels 12, intermediate wheels 13) rotatably arranged at intervals along the length of the fixed shaft 10, and a plurality of (two) stays 14 extending along the length to bridge the plurality of wheels (end wheels 12, intermediate wheels 13).

[0024] An opening / closing mechanism M is provided in the intermediate portion 10' of the fixed shaft 10 located between the intermediate wheels 13, and a rotating wheel 11 that rotates in conjunction with the rotation of the output shaft of the opening / closing mechanism M is engaged with a stay 14.As the opening / closing mechanism M rotates, the main body consisting of multiple wheels (end wheels 12, intermediate wheels 13) and the stay 14 rotates relative to the fixed shaft 10, thereby winding up the shutter curtain 2 onto the winding body or unwinding the shutter curtain 2 from the winding body.

[0025] Coil springs 15 are fitted to both longitudinal ends of the fixed shaft 10, one end of which is fixed to the fixed shaft 10 and the other end to the end wheel 12, and when the shutter curtain 2 is closed, the coil spring 15 biases the main body of the winding body in the winding direction (opening direction) of the shutter curtain 2. The fixed shaft 10 is a hollow pipe, and the wiring of the opening / closing device M extends inside the fixed shaft 10.

[0026] The main body of the winding body is formed from multiple wheels (end wheels 12, intermediate wheels 13) spaced apart in the longitudinal direction and multiple stays 14, leaving gaps (multiple openings) between these elements. An opening 16 is formed in the area surrounded by the left and right intermediate wheels 13 and the upper and lower stays 14, and in the winding assembly 1 (before the steel cover is attached), the opening / closing device M is exposed through the opening 16. The opening / closing device M according to this embodiment has a portion that includes a roughly semicircular shape in side view, and is attached to a fixed shaft 10 located in roughly the lower half of the winding body (see Figures 3A and 3B). A hanging point 21 is fixed to the left and right intermediate wheels 13 (see Figure 4).

[0027] In the embodiment shown in Figure 2A, when the opening is fully closed, the hanging point 21 is located at a lower part of the outer periphery of the winding body, and multiple slats 20' (excess slats) including slats 20' (excess slats) connected to the hanging point 21 cover the outer periphery of the winding body, and the slats 20 extend downward to extend further downward from the opening at the lower end of the shutter case C (divided by the slats 20 into opening C3 communicating with the first space α and opening C4 communicating with the second space β). In the embodiment shown in Figure 2B, when the opening is fully closed, the hanging point 21 is located in the quadrant above the outer periphery of the winding body and on the body side, and multiple slats 20, including the slat 20 connected to the hanging point 21, extend downward and further downward from the opening at the lower end of the shutter case C (divided by the slats 20 into opening C3 communicating with the first space α and opening C4 communicating with the second space β).

[0028] [C] Shutter Case 2A and 2B, the shutter case C according to this embodiment includes an upper surface C1 and a front surface C2, and the front surface C2 is detachable from the upper surface C1. In the illustrated embodiment, the front surface C2 extends in a curved shape from the front toward the main body W in a side view, with the upper end of the front surface C2 connected with a screw to a case angle member B1 located at the front end of the upper surface C1, and the lower end of the front surface C3 connected with a screw to the case angle member B2 of the lintel. The longitudinal ends of the case angle members B1 and B2 are connected to the bracket B and the intermediate bracket B'.

[0029] The winding assembly 1 is located in the internal space of the shutter case C, which includes a space γ1 between the slats 20 inside the shutter case C and the body W, and a space γ2 between the front surface C2 and the winding assembly, with the upper portion of space γ1 and the upper portion of space γ2 communicating via a space γ3 between the top surface C1 and the winding assembly. The lower portion of space γ1 communicates with the first space α via an opening C3 at the bottom end of the shutter case C, and the lower portion of space γ2 communicates with the second space β via an opening C4 at the bottom end of the shutter case C. Upper guides 4A are provided on brackets B and B', located at the widthwise ends of the opening at the bottom end of the shutter case C and at the upper ends of the guide rail 4 and center column 5.

[0030] [D] Steel cover The winding assembly according to the first embodiment and the winding assembly according to the second embodiment have in common the fact that they are equipped with a steel cover. The steel cover is attached to the winding body so as to cover the opening 16 and conceal the opening / closing mechanism M. The first embodiment and the second embodiment differ in the position of the steel cover on the winding body when the opening is fully closed. This specification discloses, as examples of the steel cover, a first embodiment (Figs. 5 to 7) consisting of a steel cover 6 and a second embodiment (Figs. 8 to 10) consisting of multiple cover units 8, 8'. The configuration of the steel cover will be described below.

[0031] [D-1] First Example of Steel Cover A first embodiment of the steel cover will be described with reference to Figures 5 to 7. The winding assembly shown in Figures 1A, 1B, 2A, 2B, 3A, 3B, and 4 is equipped with a steel cover 6 according to the first embodiment. Note that the steel cover is hidden in some of the drawings. The orientation and posture of the steel cover 6 in Figures 5 to 7 correspond to the view from arrow D in Figure 3A, and note that "up" and "down" can be reversed depending on the orientation and posture of the steel cover 6.

[0032] In the first embodiment, as shown in Fig. 7, the cover body 7 of the steel cover 6 is a plate-like body with a predetermined width and height and has an area sufficient to cover the opening / closing device M from the front. The cover body 7 is formed of four surfaces 70-73 that extend at an angle to one another. Specifically, the cover body 7 has a shape that follows the outer circumferential surface (quadrants) of the main body of the winding body in a side view, consisting of an upper first surface 70 located on the front of the steel cover 6, a lower second surface 71, a third surface 72 located above the first surface 70, and a fourth surface 73 located below the second surface 71. At both ends of the cover body 7 in the width direction, a silencing belt 63 is provided across the entire surfaces of the four surfaces 70-73.

[0033] A rectangular opening 74 extending in the width direction is formed in the first surface portion 70, and the opening functions as an inspection hatch. Four female screws 75 are formed in the first surface portion 70 near the four corners of the opening 74. A lid 60 is detachably attached to the first surface portion 70 of the cover body 7 with screws 600 so as to cover the opening 74. The lid 60 according to this embodiment is a steel lid, similar to the steel cover 6.

[0034] An upper bar 61, which is a first horizontal member, is fixed to the third surface portion 72 on the upper side of the cover body 7 with fastening members (rivets) 611, and both longitudinal ends of the upper bar 61 are provided with protrusions 610 that protrude from the widthwise ends of the cover body 7. A lower bar 62, which is a second horizontal member, is fixed to the fourth surface portion 73 on the lower side of the cover body 7 with fastening members (rivets) 621, and both longitudinal ends of the lower bar 62 are provided with protrusions 620 that protrude from the widthwise ends of the cover body 7.

[0035] 4, a pair of hanging points 21 are fixed to the intermediate wheels 13 located on both sides of the opening / closing device M, and the steel cover 6 has one protrusion 610 of the upper bar 61 and one protrusion 620 of the lower bar 62 fixed to one of the hanging points 21, and the other protrusion 610 of the upper bar 61 and the other protrusion 620 of the lower bar 62 fixed to the other hanging point 21. In other words, the steel cover 6 is located between the left and right hanging points 21, and is provided in approximately the same position as the hanging points 21 in a side view.

[0036] [D-2] Second Example of Steel Cover A second embodiment of the steel cover will be described with reference to Figures 8 to 10. The main body of the steel cover according to the second embodiment is formed by connecting three cover units 8, 8' in the width direction, and has approximately the same width and height dimensions as the cover main body 7 according to the first embodiment, and is attached in the same position as the cover main body 7. The orientation and posture of the steel cover (cover units 8, 8') in Figures 8 to 10 correspond to the case seen from arrow D in Figure 3A (assuming that the steel cover of the second embodiment has been attached in place of the steel cover 6), and it should be noted that "up" and "down" can be reversed depending on the orientation and posture of the steel cover (cover units 8, 8').

[0037] In the steel cover (three cover units 8, 8') of the second embodiment, the cover units 8 on both sides are connected to the shutter curtain 2 as hanging points, and the central cover unit 8' is a detachable cover unit that can be removed from the main body of the winding body, and by removing the central cover unit 8', an inspection hatch 85 for the opening / closing device M is formed.

[0038] The cover unit 8 is essentially the same element as the hanging base 21, and has an interlocking connection 80 formed at one end of the arc-shaped surface, a surface that forms an arc-shaped outer surface 81, and two recesses formed in the surface that have arc-shaped inner surfaces (corresponding to the arc-shaped inner surfaces 212 and 213 of the hanging base 21) at the bottom, with the inner surface corresponding to the arc-shaped inner surface 212 being referred to as inner surface 82 (see FIG. 9). The cover unit 8' differs from the cover unit 8 in that the interlocking connection 80 is cut out and the cover unit 8' does not have an interlocking connection (see FIG. 10). The cover units 8 and 8' have sound-deadening belts 84 at both widthwise ends.

[0039] The three cover units 8, 8' are connected by a lower elongated element 90 and an upper elongated element 91. The lower elongated elements 90 are connected at an arc-shaped inner surface 82. The central cover unit 8' is detachably fixed to the lower elongated element 90 by a screw 900' and to the upper elongated element 91 by a screw 910'. The left and right cover units 8 are fixed to the lower elongated element 90 by a screw 900, with one widthwise side edge 83 abutting the side edge 83' of the central cover unit 8', and are fixed to the upper elongated element 91 by a rivet 910. Both longitudinal end portions of the lower elongated element 90 form protrusions 901 that protrude from the other side edges of the left and right cover units 8'.

[0040] The interlocking connection portions 80 of the left and right cover units 8 are connected to the interlocking connection portion 210 of the uppermost slat 20 (the side farthest from the seat panel 3), and the protrusion portion 901 of the lower elongated element 90 is fixed to the hanging point 21. In the winding assembly 1 equipped with the steel cover (three cover units 8, 8') of the second embodiment, the steel cover 6 in Figure 4 is replaced with a steel cover consisting of three cover units 8, 8', and the steel cover (three cover units 8, 8') is located between the left and right hanging points 21 and is provided in approximately the same position as the hanging point 21 in a side view.

[0041] [E] First embodiment A first embodiment of the winding assembly will be described with reference to Figures 1A, 2A, 3A, and 4. The winding body is provided with a steel cover that covers the circumferential portion of the winding body, and the upper end portion of the shutter curtain 2 has multiple excess slats 20'. When the opening is fully closed, the steel cover is located on the lower outer periphery of the winding body, and the multiple excess slats 20' are located on the upper outer periphery of the winding body, so that the periphery of the opening / closing device M is covered by the steel cover and the excess slats 20'. Furthermore, intermediate holes 13 are located on both sides of the opening / closing device M, and the periphery of the opening / closing device M is blocked by the steel cover, the excess slats 20', and the intermediate wheels 13 located on both sides of the opening / closing device M.

[0042] In Figures 2A and 3A, the opening 16 facing the opening / closing mechanism M on the outer periphery of the winding body is blocked by a steel cover 6 at the lower part of the outer periphery of the winding body so that the opening / closing mechanism M is not exposed to the space γ2 inside the shutter case C at this part, and is blocked by multiple excess slats 20' at the upper part of the outer periphery of the winding body so that the opening / closing mechanism M is not exposed to the spaces γ3 and γ1 inside the shutter case C at this part.

[0043] Here, assuming that a fire breaks out outside the shutter case C (second space β), the heat from the fire will heat up the winding body, and there is a risk of it catching fire from the switchgear M. However, because a steel cover 6 and multiple excess slats 20' are provided to cover the opening 16 around the switchgear M, the flames igniting from the switchgear M are prevented from spreading to spaces γ1, γ2, and γ3, and the fire will not spread to the first space α (non-fire side) from opening C3 at the bottom end of the shutter case C below space γ1. However, there is no problem with fire spreading to the second space β (fire side) from opening C4 below space γ2.

[0044] When the opening is fully closed, the opening / closing device M housed in the winding body is covered by the steel cover 6 and the multiple excess slats 20'. In the steel cover 6 according to the first embodiment, the cover body 7 is provided with an opening 74 that functions as an inspection hatch, and the opening 74 is closed by a removable lid 60. The opening / closing device M according to this embodiment is located in the lower half of the winding body, and the parts necessary for maintenance are exposed corresponding to the opening 74. In the shutter case C according to this embodiment, the front part C2 is removable, and by removing the front part C2, the steel cover 6 is exposed, and by further removing the lid 60, the opening / closing device M is exposed from the inspection hatch 74, allowing maintenance of the opening / closing device M.

[0045] In the winding assembly 1 of the first embodiment, the steel cover 6 (Figures 5 to 7) can be replaced with a steel cover (Figures 8 to 10) consisting of three cover units 8, 8', and the steel cover (three cover units 8, 8') is located between the left and right hanging points 21 and is provided at approximately the same position as the hanging points 21 when viewed from the side.

[0046] Referring to Figures 2A and 3A, the opening 16 facing the opening / closing mechanism M on the outer periphery of the winding body is blocked by a steel cover (three cover units 8, 8') at the lower part of the outer periphery of the winding body so that the opening / closing mechanism M is not exposed to the space γ2 inside the shutter case C at this part, and is blocked by multiple excess slats 20' at the upper part of the outer periphery of the winding body so that the opening / closing mechanism M is not exposed to the spaces γ3, γ1 inside the shutter case C at this part.

[0047] Here, assuming that a fire breaks out outside the shutter case C (second space β), the heat from the fire will heat up the winding body, and there is a risk of it catching fire from the switchgear M. However, because a steel cover (three cover units 8, 8') and multiple excess slats 20' are provided to cover the opening 16 around the switchgear M, the flames igniting from the switchgear M are prevented from spreading to spaces γ1, γ2, and γ3, and the fire will not spread to the first space α (non-fire side) from opening C3 at the bottom end of the shutter case C below space γ1. However, there is no problem with fire spreading to the second space β (fire side) from opening C4 below space γ2.

[0048] When the opening is fully closed, the opening / closing device M housed in the winding body is covered with a steel cover (three cover units 8, 8') and multiple excess slats 20'. In the steel cover (three cover units 8, 8') according to the second embodiment, an inspection hatch 85 for the opening / closing device M is formed by removing the central cover unit 8'. The opening / closing device M according to this embodiment is located in the lower half of the winding body, and the areas required for maintenance are exposed corresponding to the inspection hatch 85. In the shutter case C according to this embodiment, the front part C2 is removable, and by removing the front part C2, the steel cover (three cover units 8, 8') is exposed, and by further removing the central cover unit 8', the opening / closing device M is exposed from the inspection hatch 85, allowing maintenance of the opening / closing device M.

[0049] [F] Second embodiment A second embodiment of the winding assembly will be described with reference to Figures 1B, 2B, and 3B. In Figure 2B, the opening / closing mechanism M faces a portion (opening 16) on the outer periphery of the winding body that corresponds to the quadrant on the upper side of the winding body where the hanging point 21 is located and on the body side. However, the portion on the outer periphery of the winding body that corresponds to the opening / closing mechanism M is covered with a steel cover 6 so that the opening / closing mechanism M is not exposed to the space γ1 inside the shutter case C. In the left diagram of Figure 3B, the steel cover 6 as viewed from the arrow D' is in a state that is upside down from Figure 4.

[0050] Here, assuming that a fire breaks out outside the shutter case C (second space β), the winding body will be heated by the heat of the fire and there is a risk of it igniting from the opening / closing mechanism M. However, because a steel cover 6 is provided to cover the opening / closing mechanism M, the flames igniting from the opening / closing mechanism M are prevented from spreading to space γ1, and the fire does not spread to the first space α (non-fire side) from the opening C3 at the bottom end of the shutter case C below space γ1.

[0051] Even if a flame ignited from the opening / closing mechanism M spreads to the space γ2 between the front part C2 of the shutter case C and the winding assembly body 1, the flame has a long path to travel to the space γ1 and the opening C3, so the spread of fire from the opening C3 to the first space α (non-fire side) is suppressed or delayed. Also, there is no problem with fire spreading from the opening C4 below the space γ2 to the second space β (fire side).

[0052] The winding body according to this embodiment has an opening 16 formed around the entire periphery, and in Fig. 2B, by removing the front portion C2, the opening / closing device M can be accessed through the opening 16. In the winding body, if the portion facing the front portion C2 is blocked when the opening is fully closed, the shutter curtain 2 can be rolled up slightly from the fully closed state of the opening, and the hanging point 21 and the steel cover 6 will rotate to a position corresponding to the front portion C2 of the shutter case C. In this state, by removing the front portion C2, the steel cover 6 is exposed, and by removing the lid 60, an inspection hatch for the opening / closing device M is formed, allowing maintenance of the opening / closing device M.

[0053] In the winding assembly 1 of the second embodiment, the steel cover 6 (Figures 5 to 7) can be replaced with a steel cover (Figures 8 to 10) consisting of three cover units 8, 8', and the steel cover (three cover units 8, 8') is located between the left and right hanging points 21 and is provided at approximately the same position as the hanging points 21 when viewed from the side.

[0054] The opening / closing mechanism M faces a portion (opening 16) on the outer periphery of the winding body that corresponds to the quadrant on the upper side of the winding body where the hanging point 21 is located and on the main body side (see Figures 2B, 3B, and 4). However, on the outer periphery of the winding body, the portion corresponding to the opening / closing mechanism M is covered with a steel cover (three cover units 8, 8') so that the opening / closing mechanism M is not exposed to the space γ1 inside the shutter case C at this portion.

[0055] Here, assuming that a fire breaks out outside the shutter case C (second space β), the winding body will be heated by the heat of the fire and there is a risk of it catching fire from the opening / closing mechanism M. However, because a steel cover (three cover units 8, 8') is provided to cover the opening / closing mechanism M, the flames igniting from the opening / closing mechanism M are prevented from spreading to space γ1, and the fire does not spread to the first space α from the opening C3 at the bottom end of the shutter case C below space γ1.

[0056] The winding body according to this embodiment has an opening 16 formed around the entire periphery, and in Fig. 2B, by removing the front portion C2, the opening / closing device M can be accessed through the opening 16. In the winding body, if the portion facing the front portion C2 is blocked when the opening is fully closed, the shutter curtain 2 can be rolled up slightly from the fully closed state of the opening, and the hanging base 21 and steel cover (three cover units 8, 8') will rotate to a position corresponding to the front portion C2 of the shutter case C. In this state, by removing the front portion C2, the steel cover 6 is exposed, and by removing the central cover unit 8', an inspection hatch 85 for the opening / closing device M is formed, allowing maintenance of the opening / closing device M.

[0057] [Note] a winding body to which the shutter curtain is attached and around which the shutter curtain is wound; an opening / closing mechanism that is installed inside the winding body and rotates the winding body; In a winding assembly consisting of An opening is formed on the outer periphery of the winding body so as to face the opening and closing device, A steel cover is provided on the winding body so as to cover a circumferential portion of the winding body and close at least a portion of the opening. Winding assembly three-dimensional. In one embodiment, an access hatch can be formed by removing a portion of the steel cover. In one embodiment, the winding body is a fixed shaft that rotatably supports the winding body; a plurality of wheels rotatably mounted on the fixed shaft at intervals in the longitudinal direction; a plurality of stays extending in the longitudinal direction so as to bridge the plurality of wheels; It consists of A gap is formed between the wheels and between the stays, and the opening is a part of the gap. In one embodiment, the winding body is provided with a pair of hanging points located on both sides of the opening and closing device, The steel cover is fixed to the pair of hanging points. In one embodiment, the suspension point is fixed to a wheel that forms the winding body. In this embodiment, the steel cover is located at approximately the same position as the suspension point in a side view. In one embodiment, the suspension point and the steel cover are located in the quadrant on the upper side of the outer periphery of the winding body and on the body side, The winding assembly is located within a shutter case that is attached to the main body in a corbel-like manner, and the steel cover faces the upper space between the slats located within the shutter case and the main body. In one embodiment, a portion including the front portion of the shutter case is removable, and by removing this portion, the steel cover portion can be removed to form an inspection hatch. In one embodiment, the steel cover is formed by connecting a plurality of cover units in the width direction, Some of the multiple cover units are connected to the shutter curtain as hanging points, and the remaining cover units are detachable cover units that can be removed from the winding body, and the inspection hatch is formed by removing the detachable cover units. [Explanation of symbols]

[0058] 1-volume assembly 10 Fixed axis 12 End wheel (winding body) 13 Intermediate wheel (winding body) 14 Stay (winding body) 16 Aperture 2. Shutter Curtains 20 slats 20´ extra slats 21 Hanging base 6 Steel cover 60 Lid 7 Cover body 74 Opening (inspection hatch) 8 Cover unit (steel cover) 8´ Cover Unit (Steel Cover) 85 Inspection hatch Shutter Case C M Opening and Closing Machine

Claims

1. a winding body to which the shutter curtain is attached and around which the shutter curtain is wound; an opening / closing mechanism that is installed inside the winding body and rotates the winding body; In a winding assembly consisting of An opening is formed on the outer periphery of the winding body so as to face the opening and closing device, a steel cover is provided on the winding body so as to cover a circumferential portion of the winding body and close at least a portion of the opening; The upper end portion of the shutter curtain has a plurality of excess slats, When the opening is fully closed, the steel cover is positioned on the outer periphery of the lower side of the winding body, and the excess slats are positioned on the outer periphery of the upper side of the winding body, so that the opening around the opening / closing device is covered by the steel cover and the excess slats. Fireproof structure of a winding assembly.

2. The winding body is a fixed shaft that rotatably supports the winding body; a plurality of wheels rotatably mounted on the fixed shaft at intervals in the longitudinal direction; a plurality of stays extending in the longitudinal direction so as to bridge the plurality of wheels; It consists of A gap is formed between the wheels and between the stays, and the opening is a part of the gap. A fireproof structure for a winding assembly according to claim 1.

3. some of the wheels are located on both sides of the opening and closing machine; When the opening is fully closed, the periphery of the opening / closing device is blocked by the steel cover, the excess slats, and wheels located on both sides of the opening / closing device. A fireproof structure for a winding assembly according to claim 2.

4. An inspection hatch can be formed by removing the steel cover. A fireproof structure for a wound assembly according to any one of claims 1 to 3.

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