Movable wind-resistant hook

Abstract

To secure an operation of a wind resistant hook by maintaining an engagement posture of a claw part when employing a movable wind resistant hook having the claw part that can move between a storage posture and the engagement posture.SOLUTION: A wind resistant hook has an operation plate 7 that can slidably move between a first position and a second position and a claw part 4 that can move between an engagement posture and a storage posture. When the operation plate 7 is located at the first position, the claw part 4 is in the storage posture, and the claw part 4 shifts from the storage posture to the engagement posture in conjunction with the movement of the operation plate 7 from the first position to the second position. When the claw 4 is in the storage posture, the wind resistant hook F is in a non-operation state. When the claw 4 is in the engagement posture, the wind resistant hook F is in an operation state. The wind resistant hook has lock means (a fitting protrusion 140, a second fitting receiving portion 79) to maintain the operation state of the wind resistant hook F.SELECTED DRAWING: Figure 15

Description

[Technical Field]

[0001] The present invention relates to a wind-resistant hook to be attached to a shutter curtain. [Background technology]

[0002] When the shutter curtain is fully closed, closing the building opening, both widthwise ends of the shutter curtain are received within the guide rails on the left and right sides of the building opening. However, when wind pressure acts on the shutter curtain, the shutter curtain may expand, causing the widthwise ends to slip out of the guide rails.

[0003] Wind-resistant hooks are known as a means for preventing the widthwise ends of shutter curtains from slipping out of the guide rails when the opening is fully closed. Wind-resistant hooks are generally provided on heavy shutters that require a certain level of wind resistance, but wind-resistant hooks are rarely required as standard equipment for so-called lightweight shutters.

[0004] In addition, conventional wind-resistant hooks are permanently installed in a protruding position at the longitudinal ends of the slats that make up the shutter curtain, and are installed across the height of the shutter curtain when the opening is in a fully closed position (Patent Document 1, Patent Document 2). [Patent Document 1] Actual opening Showa 62-85688 [Patent Document 2] Jikkai Showa 64-27397 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] The present invention aims to make the operation of a movable wind-resistant hook more reliable by maintaining the engagement position of the claw portion when using a movable wind-resistant hook whose claw portion is movable between a storage position and an engagement position. [Means for solving the problem]

[0006] The technical means adopted by the present invention are: an operating unit that is slidable between a first position and a second position; a claw portion movable between a locking position and a storage position; Equipped with When the operation unit is in the first position, the claw unit is in a stored position, In conjunction with the operation portion moving from the first position to the second position, the claw portion changes from a storage position to a locking position. A wind-resistant hook, When the claw is in the storage position, the wind-resistant hook is in an inoperative state, and when the claw is in the locking position, the wind-resistant hook is in an operative state; A locking means is provided to maintain the wind-resistant hook in an operating state. It is a movable wind-resistant hook.

[0007] In one embodiment, the locking means is a holding means for holding the operating portion in the second position. In one embodiment, the wind-resistant hook includes a case, and the case has a portion facing a side edge of the operating portion, a fitting protrusion is provided on one of the side edge of the operating portion and the portion of the case, and a fitting receiving portion is provided on the other; When the operation portion is in the second position, the fitting protrusion is in a fitted state with the fitting receiving portion, The mated state can be released by sliding the operating portion with a predetermined force.

[0008] In one aspect, when the wind-resistant hook is in an activated state, the claw portion in the locked position is biased by a spring material in a direction to maintain the locked position, and the force acting to move the claw portion in the locked position to the stored position is absorbed by the spring material, thereby maintaining the activated state of the wind-resistant hook by the locking means. In one embodiment, when the fitting protrusion and the fitting receiving portion are in a fitted state (the windproof hook is in an activated state), the claw portion in the locking position is biased by a spring material in a direction to maintain the locking position, When the wind-resistant hook is in an activated state, the force acting to move the claw portion, which is in the locked position, to the stored position is absorbed by the spring material, thereby maintaining the mating state between the mating protrusion and the mating receiving portion.

[0009] In one embodiment, an intermediate member is connected to the operation unit via a spring member and slides in conjunction with the sliding movement of the operation unit, The claw portion is movable between a storage position and a locking position in conjunction with the sliding movement of the intermediate member, When the wind-resistant hook is in an activated state, the force acting to move the claw portion, which is in the locked position, to the stored position is absorbed by the spring material, thereby maintaining the mating state between the mating protrusion and the mating receiving portion.

[0010] In one embodiment, the locking means for maintaining the operating state of the wind-resistant hook is a first locking means, Furthermore, a second locking means is provided to keep the wind-resistant hook in an inoperative state. In one embodiment, the second locking means is a retaining means for retaining the operating portion in the first position.

[0011] In one embodiment, the wind-resistant hook includes a case, and the case has a portion facing a side edge of the operating portion, a fitting protrusion is provided on one of the side edge of the operation portion and the portion of the case, and a first fitting receiving portion and a second fitting receiving portion are provided on the other; When the operation portion is in a first position, the fitting protrusion is in a fitted state with the first fitting receiving portion, When the operation portion is in the second position, the fitting protrusion is in a fitted state with the second fitting receiving portion, The mated state can be released by sliding the operating portion with a predetermined force. In one embodiment, the first locking means and the second locking means share the same fitting protrusion. The first locking means and the second locking means may each be provided with a fitting protrusion.

[0012] One aspect of the present invention relates to a shutter equipped with the above-mentioned movable wind-resistant hook, The guide rails located at both ends of the building opening in the width direction are provided with latching portions corresponding to the height positions of the wind-resistant hooks, When the opening is fully closed, the claw portions in the locking position lock onto the locked portions, providing a wind-resistant structure that prevents the slat ends from slipping out of the guide rails. [Effects of the Invention]

[0013] The present invention employs a movable wind-resistant hook whose claw portion is movable between a storage position and an engagement position, and by maintaining the engagement position of the claw portion after setting the wind-resistant hook to an operating state, the operation of the wind-resistant hook is made more reliable. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 10 is a front view of the shutter device in a fully closed position as viewed from the indoor side. [Figure 1A] FIG. 2 is a partially enlarged view showing the locking device portion of FIG. [Figure 2] FIG. 4 is a vertical cross-sectional view of the shutter device in a fully closed position. [Figure 2A] 3 is a partially enlarged view showing an upper portion of the guide rail of FIG. 2. FIG. [Figure 3] FIG. 10 is a diagram showing a wind-resistant hook unit. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12]FIG. 10 is a diagram showing the wind-resistant hook unit in an inoperative state (steady state) (the cover plate is partially omitted). [Figure 13] 13 is a diagram showing the state in which the operation plate starts to slide in the first direction from the state in FIG. 12 (the cover plate is partially omitted in the drawing). [Figure 14] 14 is a diagram showing a state in which the operation plate has further slid in the first direction from the state in FIG. 13 (the cover plate is partially omitted in the drawing). [Figure 15] 15 is a diagram showing the operation state of the wind-resistant hook after the operation plate has further slid in the first direction from the state of FIG. 14 and locked (the cover plate is partially omitted in the drawing). FIG. [Figure 16] In the operating state of FIG. 15, the state where the claw portion in the locking position is pushed in is shown (the cover plate is partially omitted). [Figure 17] The upper figure shows the mounting plate fixed to the back of the slat, and the lower figure shows the process of attaching the wind-resistant hook unit to the mounting plate. [Figure 18] 10A and 10B are diagrams showing the process of attaching a wind-resistant hook to a mounting plate (only the bottom plate is shown). [Figure 19] The upper figure shows the wind-resistant hook attached to the back of the slat in an inoperative state (the operating plate is in the first position), and the lower figure shows the wind-resistant hook attached to the back of the slat in an activated state (the operating plate is in the second position). [Figure 20] FIG. 10 is a diagram showing an operation panel equipped with a display unit. [Figure 21] The figure shows the state in which the slat is positioned within the guide rail without any deviation, (A) shows the wind-resistant hook in an inoperative state (with the claw portion in the retracted position), (B) shows the wind-resistant hook in an activated state (with the claw portion in the locked position), and (C) is a cross-sectional view of the guide rail. [Figure 22] This shows the slats shifted to one side within the guide rail, (A) shows the wind-resistant hook in an inoperative state (with the claw in the retracted position), (B) shows the wind-resistant hook in a state where the claw abuts the bottom of the guide rail (the claw moves relatively backward) and the operating plate is in the second position and locked, and (C) shows the wind-resistant hook in an activated state (with the claw in the locked position). [Figure 23] This is a diagram explaining the action of the wind-resistant hook when surface pressure acts on the shutter curtain. The upper diagram shows the case where surface pressure acts to inflate the shutter curtain toward the inside, and the lower diagram shows the case where surface pressure acts to inflate the shutter curtain toward the outside. [Figure 24] 2A to 2C are diagrams illustrating in detail the configuration of a shutter curtain according to the present embodiment. [Figure 25] This is a diagram showing a schematic diagram of the behavior of the shutter curtain when the wind-resistant hook is in an activated state with the opening fully closed and wind pressure acts on the shutter curtain, and is a cross-sectional view showing a slat with a wind-resistant hook. [Figure 26] This is a diagram showing a schematic cross-sectional view of the seat plate illustrating the movement of the shutter curtain when the wind-resistant hook is in an activated state with the opening fully closed and wind pressure acts on the shutter curtain. [Figure 27] This is a diagram showing a schematic of the movement of the shutter curtain when the wind-resistant hook is in an activated state with the opening fully closed and wind pressure acts on the shutter curtain, and is a cross-sectional view showing the slats located in the upper part of the opening. [Figure 28] FIG. 10 is a diagram showing the inoperative state (steady state) of a wind-resistant hook unit according to another embodiment. [Figure 29] A diagram showing the operating state of a wind-resistant hook unit according to another embodiment. [Figure 30] This is a diagram showing the inoperative state (steady state) of a wind-resistant hook unit equipped with a stopper. [Figure 31] FIG. 31 is a diagram showing the operating state of the wind-resistant hook unit shown in FIG. 30. DETAILED DESCRIPTION OF THE INVENTION

[0015] [A] Overall structure of the shutter Fig. 1 is a front view of a shutter device according to this embodiment, and Fig. 2 is a longitudinal cross-sectional view of the shutter device according to this embodiment. The shutter device according to this embodiment is a lightweight manual shutter, but lightweight shutters and manual shutters are merely examples and do not limit the present invention, and the present invention can also be applied to, for example, an electric shutter equipped with an opening and closing mechanism.

[0016] The shutter curtain 1 is made up of a number of long slats 10 that extend in the width direction of the opening and are connected in the height direction, and is provided with a seat plate 11 at its lower end, while the upper end of the shutter curtain 1 is connected via a hanging point 10' to a winding body 2 that is placed above the opening. Guide rails 3 are erected on both the left and right ends of the building opening in the width direction, and when the shutter curtain 1 is raised or lowered or in the fully closed position, the grooves of the guide rails 3 are designed to receive both widthwise ends of the shutter curtain 1 (both lengthwise ends of the slats 10).

[0017] When the opening is fully closed, the shutter curtain 1 is wound up onto the winding body 2, causing both widthwise ends of the shutter curtain 1 to rise while being guided by the guide rails 3, thereby opening the building opening; when the opening is fully open, the shutter curtain 1 is unwound from the winding body 2, causing both widthwise ends of the shutter curtain 1 to fall while being guided by the guide rails 3, thereby closing the building opening.

[0018] The shutter device according to this embodiment is a manual shutter. The winding body 2 is biased by a balance spring 2' in the direction of winding up the shutter curtain 1. When a force to lower the shutter curtain 1 is manually applied to the shutter curtain 1 in the fully open position to start the descent, the shutter curtain 1 descends under the manual operating force and its own weight, landing on the floor FL or the ground and assuming the fully closed position. When a force to lift the shutter curtain 1 is manually applied to the shutter curtain 1 in the fully closed position to start the ascent, the shutter curtain 1 rises while being wound up by the manual operating force and the biasing force of the balance spring, assuming the fully open position.

[0019] 1A, a locking device 19 is provided at a position below the middle of the shutter curtain 1 in the height direction. The locking device 19 is provided on a slat 10 at a predetermined height position of the shutter curtain 1, and includes an operating unit 190 provided at the center of the slat 10 in the longitudinal direction, left and right rods 191 extending horizontally from the operating unit 190 toward both ends of the slat 10 in the longitudinal direction, and a locking unit 192 with multi-stage claws formed at the tips of the left and right rods 191. A locked unit (not shown) is provided within the guide rail 3 at a height position corresponding to the locking device 19 in the fully closed state of the opening. When the opening is fully closed, by rotating the operating unit 190 of the locking device 19, the locking unit 192 protrudes from the longitudinal end edge 103 of the slat 10 and locks with the locked unit, thereby restricting upward movement of the shutter curtain 1 in the fully closed position. The locking device 19 restricts the upward movement of the shutter curtain 1 when the opening is fully closed, and the engagement state between the locking portion 192 and the locked portion is such that the upward movement of the locking portion 192 is restricted, and the engagement state of this locking device 19 cannot counteract the movement of the end of the slat 10 coming out of the guide rail 3.

[0020] Both longitudinal ends of the reel 2 are supported by left and right plate-shaped brackets B. In this embodiment, a shutter case 20 is provided above the building opening, and the reel 2 is located inside the shutter case 20. That is, the shutter case 20 provides a shutter storage space for storing the shutter curtain 1 wound on the reel 2. Note that in this embodiment, the shutter case 20 serves as the shutter storage space, but the space within the ceiling may also form the shutter storage space. A horizontally long opening is formed on the underside of the shutter case 20 across the entire width of the building opening, through which the shutter curtain 1 passes when raised and lowered, and an inner lintel 21 and an outer lintel 22 are provided adjacent to the horizontally long opening, extending across the entire width of the building opening. Both longitudinal ends of the inner lintel 21 and the outer lintel 22 are supported by left and right brackets B (upper guides 23). The guide rail 3 extends the entire height of the building opening, and an upper guide 23 is provided at the upper end of the guide rail 3, expanding upward to correspond to the height positions of the inner lintel 21 and outer lintel 22. As shown in FIG. 2A , the upper guide 23 is fixed to the lower portion of the bracket B. The upper guide 23 is formed with a pair of guide sections 230, 230 that expand in a curved shape toward the upper end and a vertical bottom piece 231 (with vertically inclined tapers 2310, 2311). The lower side of the lower surface 232 of the guide section 230 is provided with a recessed section that receives the upper end 36 of the guide rail 3, and the front side of the recessed section is formed with an abutment section 233 against which the wide section 111 of the seat panel 11 abuts when the opening is fully open. The groove width of the pair of guide sections 230, 230 at their lower ends is approximately the same as the width of the guide groove 35 of the guide rail 3.

[0021] When the opening is fully closed, the seat panel 11 at the lower end of the shutter curtain 1 rests on the floor FL or the ground. Both longitudinal ends of the seat panel 11 are located inside the guide rail 3. The seat panel 11 according to this embodiment comprises a rising portion 110 connected to the lowest slat 10 and a wide portion 111 located at the lower end of the rising portion 110 and extending horizontally, with both left and right longitudinal ends of the rising portion 110 located inside the guide rail 3. The length of the wide portion 111 is shorter than the opening width and wider than the width of the guide groove 35 (FIG. 21(C)) of the guide rail 3, with the underside of the wide portion 111 abutting against the floor FL. The seat panel 11 is thicker and sturdier than the slats 10, and has greater mechanical strength than the slats 10.

[0022] As shown in Figure 2, when the opening is fully closed, the opening closing portion 1' of the shutter curtain 1 closes the building opening over the entire height of the opening, and both widthwise ends of the slats 10 of the opening closing portion 1' of the shutter curtain 1, which is in a substantially vertical position, are located in the grooves of the guide rail 3. The slats 10 that make up the upper portion 1D of the shutter curtain 1, which is in a substantially vertical position, are located in the shutter case 20, and both longitudinal end portions of these slats 10 are located above the upper end of the guide rail 3. The slats 10 located at the lower end of the shutter case 20 are located between the inner and outer lintels 21, 22, and both longitudinal end portions are located in the upper guide 23.

[0023] As shown in Figures 1, 2 and 24, movable wind-resistant hooks F are provided at both longitudinal ends of a plurality of slats (four in this embodiment) 10 located in the middle of the height direction of the opening closure section 1' of the shutter curtain 1 when it is in the fully closed position. The movable wind-resistant hooks F have movable claws 4. When the shutter curtain 1 is opened or closed, or when the opening is normally fully closed, the claws 4 are in a stored position, and when the opening is fully closed, the claws 4 are in a protruding position, thereby functioning as wind-resistant hooks. Hook receivers 16 are provided inside the guide rail 3, at heights corresponding to the height positions of the wind-resistant hooks F of the shutter curtain 1 when it is in the fully closed position.

[0024] [B] Windproof hook [B-1] Overview The wind-resistant hook F according to this embodiment is a wind-resistant hook assembly or wind-resistant hook unit, and is assembled from a claw portion 4 (Fig. 4), an intermediate plate 5 (Fig. 5), a compression plate 6 (Fig. 6), an operation plate 7 (Fig. 7), a bottom plate 8 (Fig. 8), a cover plate 9 (Fig. 9), a first coil spring 12, a second coil spring 13, and a lock spring 14. These elements, except for the first coil spring 12 and the second coil spring 13, are plate-like elements obtained by bending or punching a metal plate of a predetermined shape.

[0025] As shown in FIG. 3, in this embodiment, the bottom plate 8 and the cover plate 9 form a case for the movable wind-resistant hook F (five sides are closed, namely, the bottom surface 80 of the bottom plate 8, the top surface 90 of the cover plate 9, the hanging wall 91, the first side wall 92, and the second side wall 93, and the tip side is open), and the claw portion 4, the intermediate plate 5, the compression plate 6, the operation plate 7, the first coil spring 12, the second coil spring 13, and the lock spring 14 are housed inside. The wind-resistant hook F according to this embodiment is attached to the surface of the slat 10 via a mounting plate 15 (FIG. 10). More specifically, the mounting plate 15 is fixed to the longitudinal end of the slat 10, and the case for the wind-resistant hook F (the bottom surface 80 of the bottom plate 8) is attached to this mounting plate 15.

[0026] The claw portion 4 is movable between a storage position and an engagement position, and the operation plate 7, intermediate plate 5, and compression plate 6 are slidable. In conjunction with the sliding movement of the operation plate 7, the claw portion 4 moves from the storage position to the engagement position and from the engagement position to the storage position. The operation plate 7 and intermediate plate 5 are connected via a first coil spring 12, so that the intermediate plate 5 slides in conjunction with the sliding movement of the operation plate 7. A base end portion of the claw portion 4 is engaged or loosely fitted with a tip end portion of the intermediate plate 5 with some play, so that the claw portion 4 moves between the storage position and the engagement position in conjunction with the sliding movement of the intermediate plate 5. The intermediate plate 5 and compression plate 6 are connected via a second coil spring 13, so that the compression plate 6 can slide integrally with the operation plate 7 and intermediate plate 5 in conjunction with the sliding movement of the intermediate plate 5, which is linked to the sliding movement of the operation plate 7.

[0027] Below, each element constituting the wind-resistant hook F will be described in detail. The description is based mainly on the position of each element shown in each figure, and it should be noted that this differs from the position of each element when the wind-resistant hook F is actually attached to the slat 10. In this specification, when the wind-resistant hook F is attached to the longitudinal end of the slat 10, the side furthest from the longitudinal center of the slat 10 will be referred to as the tip side or front side, and the side closest to it will be referred to as the base side or rear side. The position when the operating plate 7 has moved furthest to the base side or rear side will be referred to as the first position, and the position when it has moved furthest to the tip side or front side will be referred to as the second position. The direction in which the operating plate 7 slides from the first position to the second position (the tip side or forward direction) will be referred to as the first direction, and the direction in which it slides from the second position to the first position (the base side or rear direction) will be referred to as the second direction.

[0028] [B-2] Claw part 4, the claw portion 4 has a main body integrally formed from a front portion 40 and a rear portion 41 in a "L" shape in side view, and a locking piece 42 that is folded back and integrally formed at the tip of the main body (the tip of the front portion 40) and has a "R" shape in side view. The angle between the front portion 40 and the locking piece 42 is an acute angle.

[0029] The base end portion of the claw portion 4 includes a base end portion 41' of the rear portion 41, a pair of hanging pieces 43 hanging from both widthwise ends of the base end portion 41', and a rising piece 44 positioned between the pair of hanging pieces 43 and rising perpendicularly from the base end portion 41'. The angle between the rear portion 41 and the hanging piece 43 is approximately a right angle, and the angle between the rear portion 41 and the rising piece 44 is also approximately a right angle. In a side view, the hanging piece 43 and the rising piece 44 extend linearly, with the rear portion 41 extending perpendicular to this straight line. The locking piece 42 and the rising piece 44 are formed by being bent toward the same side (upper side in the embodiment of FIG. 4 ) of the main body (the front portion 40 and the rear portion 41).

[0030] The claw portion 4 is a movable element that is in a storage position when the shutter is opened or closed, or when the opening is normally fully closed, so as not to interfere with the opening or closing of the shutter. In conjunction with the sliding movement of the operation plate 7, which is in the first position, in a first direction, the claw portion 4 slides from the storage position toward the tip and protrudes from the tip of the case (tip edge 900 of the top surface portion 90, tip edge 921 of the first side wall 92, and tip edge 931 of the second side wall 93), and then rotates to assume the locking position. When the claw portion 4 is in the locking position, the operation plate 7 is in the second position, and in conjunction with the sliding movement of the operation plate 7, which is in the second position, in the second direction, the claw portion 4 changes from the locking position to the storage position.

[0031] [B-3] Intermediate plate As shown in Figure 5, the intermediate plate 5 has a roughly rectangular surface portion 50 with specified length and width dimensions, and the tip side of the surface portion 50 is a wide portion 51. At the tip of the surface portion 50 (the tip of the wide portion 51), a rising piece 52 is formed that rises vertically across the entire width of the wide portion 51, and at the base end side of the wide portion 51, a pair of rising pieces 53 that also rise vertically are formed.

[0032] A rising piece 54 is formed at the base end of the surface portion 50. An opening 55 extending in the lengthwise direction is formed in the surface portion 50, and the base end of the opening 55 reaches the rising piece 54, and a connecting portion 540 on the base end side (rear end) of the first coil spring 12 is formed on the rising piece 54. At the tip of the opening 55, a rising piece 56 is formed, which is a connecting portion on the tip end side (front end) of the second coil spring 13.

[0033] A pair of protruding pieces 57 protruding in the width direction are formed on the side edge 500 of the face portion 50, positioned closer to the base end than the center in the longitudinal direction of the face portion 50. Each protruding piece 57 has a front edge 570 positioned on the tip side of the face portion 50.

[0034] At the tip end of the intermediate plate 5, rising pieces 52 and 53 are formed at both widthwise ends of the wide portion 51, and a pair of recessed grooves 58 are formed from the rising pieces 52 and 53 to both widthwise ends of the wide portion 51. The width of the wide portion 51 is approximately the same as the width of the claw portion 4. The width of the rising piece 53 is slightly larger than the width of the hanging piece 43 of the claw portion 4. The width of the rising piece 44 of the claw portion 4 is smaller than the distance between the left and right rising pieces 53 of the intermediate plate 5. The height of the rising piece 52 is smaller than the height of the rising piece 53. The recessed groove 58 is designed to receive the hanging piece 43 of the base end portion of the claw portion 4 with some play, and the hanging piece 43 of the base end portion of the claw portion 4 can rotate while received in the recessed groove 58.

[0035] [B-4] Compression plate 6, the compression plate 6 has a substantially rectangular surface portion 60, a narrow contact portion 61 at the tip of the surface portion 60, and a narrow hanging piece 62 at the base end of the surface portion 60. An opening 63 extending in the front-to-rear direction is formed in the surface portion 60, the rear end of the opening 63 reaching the upper half of the hanging piece 62, and a connecting portion 620 for the rear end side of the second coil spring 13 is formed in the lower half of the hanging piece 62.

[0036] The width of the abutment portion 61 formed at the tip of the compression plate 6 is smaller than the width of the raised piece 44 of the claw portion 4 and the distance between the pair of raised pieces 53 of the intermediate plate 5. The compression plate 6 is set with the lower surfaces of both widthwise ends on the tip side of the face portion 60 placed on (in contact with) the upper ends of the raised pieces 53 of the intermediate plate 5, and the abutment portion 61 abutting against the outer surfaces of the raised pieces 44 of the claw portion 4 (with the hanging pieces 43 received in the recessed grooves 58), with the face portion 60 facing the front portion of the face portion 50 of the intermediate plate 5, and the lower end of the hanging piece 62 on the base end side of the face portion 60 abutting against the upper surface of the face portion 50. When the compression plate 6 is set relative to the intermediate plate 5, the raised piece 56 of the intermediate plate 5 is located in front of the opening 63 of the face portion 60 of the compression plate 6.

[0037] The rising piece 56 of the intermediate plate 5 is spaced a predetermined distance forward from the connecting portion 620 of the compression paddle 6. The second coil spring 13 is a tension coil spring, and in a tensioned state, its distal end (front end) is connected to the rising piece 56 of the intermediate plate 5 and its proximal end (rear end) is connected to the connecting portion 620 of the compression paddle 6. The distal ends of the first side wall 81 and the second side wall 82 of the bottom plate 8 abut against the outer surface (rear surface) of the distal rising piece 53 of the intermediate plate 5, restricting rearward movement of the intermediate plate 5 (note that this restriction is optional and movement may not be restricted). The biasing force of the second coil spring 13 connecting the intermediate plate 5 and the compression paddle 6 acts to move the compression paddle 6 forward, and the abutment portion 61 at the distal end of the compression paddle 6 abuts against the rising piece 44 at the proximal end portion of the claw portion 4 so as to press against the rising piece 44.

[0038] When the second coil spring 13 is attached to the intermediate plate 5 and the compression plate 6, the front portion of the face 50 of the intermediate plate 5 faces the face 60 of the compression plate 6, and part of the upper side of the second coil spring 13 is located in the opening 63 of the face 60, and part of the lower side is located in the opening 55 of the face 50. By forming the openings 55, 63 at the second coil spring 13, the distance between the face 50 of the intermediate plate 5 and the face 60 of the compression plate 6 is made as small as possible, thereby reducing the thickness of the case of the movable wind-resistant hook F and making it compact. Note that instead of the openings 55, 63, recessed grooves may be engaged in the faces 50, 60 to partially receive the second coil spring 13.

[0039] The compression plate 6 is placed on the intermediate plate 5 and slides back and forth within the case together with the intermediate plate 5 as the intermediate plate 5 slides back and forth, but the compression plate 6 is placed slidably on the intermediate plate 5 and can slide relative to the intermediate plate 5 in accordance with changes in the length of the second coil spring 13.

[0040] [B-5] Operation board 7, the operation plate 7 includes a face portion 70 that is generally rectangular in plan view, a hanging piece 71 located at the tip of the face portion 70 and hanging down, a hanging piece 72 located at the base end of the face portion 70 and hanging down, a rear face portion 73 that extends rearward from the lower end of the hanging piece 72, and a rising piece 74 that rises from the rear end of the rear face portion 73. The width of the hanging pieces 71 and 72 is slightly smaller than the width of the face portion 70, and the width of the rear face portion 73 and the rising piece 74 is the same as the width of the hanging piece 72.

[0041] The lower end of the hanging piece 71 is cut out to a predetermined width to form a recess 710. The width of the recess 710 is slightly larger than the width of the surface portion 50 of the intermediate plate 5. When the surface portion 50 of the intermediate plate 5 is received in the recess 710, the lower end of the hanging piece 71 abuts against the bottom surface portion 80 of the bottom plate 8, and the inner surface (rear surface) of the hanging piece 71 abuts against or engages with the front edge 570 of the protruding piece 57 of the intermediate plate 5. At this time, the surface portion 70 of the operation plate 7 faces the rear portion of the surface portion 50 of the intermediate plate 5. That is, the surface portion 60 of the compression plate 6 faces the front portion of the surface portion 50 of the intermediate plate 5, and the surface portion 70 of the operation plate 7 faces the rear portion of the surface portion 50 of the intermediate plate 5. In a plan view, the surface portion 60 of the compression plate 6 and the surface portion 70 of the operation plate 7 are lined up in the front-to-rear direction within the case.

[0042] An opening 75 is formed in the surface portion 70 of the operation plate 7 from the front end toward the rear, and a connecting portion 711 is formed in the hanging piece 71 for the front end of the first coil spring 12. The connecting portion 711 of the hanging piece 71 of the operation plate is spaced a predetermined distance forward from the connecting portion 540 of the rising piece 54 of the intermediate plate 5. The first coil spring 12 is a tension coil spring, and when tensioned to a predetermined length, the tip side (front end) is connected to the connecting portion 711 of the hanging piece 71 and the base side (rear end) is connected to the connecting portion 540 of the rising piece 54.

[0043] The inner surface of the hanging piece 71 at the tip of the operation plate 7 engages with the front edge 570 of the protruding piece 57 of the intermediate plate 5, thereby restricting rearward movement of the operation plate 7 relative to the intermediate plate 5, and the outer surface of the rising piece 53 at the tip of the operation plate 7 abuts against the tip edges (front edges) 810, 820 of the first side wall 81 and the second side wall 82 of the bottom plate 8. The biasing force of the first coil spring 12 connecting the operation plate 7 and the intermediate plate 5 acts to counteract the force sliding the operation plate 7 forward, and when the operation plate 7 is slid forward, the operation plate 7 and the intermediate plate 5 move integrally toward the tip side while the stretched length of the first coil spring 12 is maintained.

[0044] When the first coil spring 12 is attached to the intermediate plate 5 and the operation plate 7, the rear portion of the surface 50 of the intermediate plate 5 faces the surface 70 of the operation plate 7, and part of the upper side of the first coil spring 12 is located in the opening 75 of the surface 70, and part of the lower side is located in the opening 55 of the surface 50. By forming the openings 55, 75 at the positions of the first coil spring 12, the distance between the surface 50 of the intermediate plate 5 and the surface 70 of the operation plate 7 is made as small as possible, thereby reducing the thickness of the case of the movable wind-resistant hook F and making it compact. Note that instead of the openings 55, 75, concave grooves may be engaged in the surfaces 50, 70 to partially receive the first coil spring 12.

[0045] As shown in Figures 7 and 20, one side edge 700 of the face portion 70 of the operation plate 7 is formed with a recess 701 in which the lock spring 14 attached to the second side wall 82 of the bottom plate 8 is positioned. The recess 701 is generally trapezoidal in plan view, with a front inclined edge 702, a rear inclined edge 703, and a bottom edge 704, and the bottom edge 704 of the recess 701 is formed with a first protrusion 76 located on the tip side and a second protrusion 77 located on the base end side. A first fitting receiver 78 is formed in front of the first protrusion 76, and a second fitting receiver 79 is formed behind the second protrusion 77. The lock spring 14 according to this embodiment is a leaf spring and includes a protruding fitting protrusion 140.

[0046] When the fitting protrusion 140 of the lock spring 14 is in a fitted state with the first fitting-receiving portion 78 (first fitted state), the operation plate 7 is in a first position, and the windproof hook F is in a non-operated state (the claw portion 4 is in a stored position). The first position of the operation plate 7 is maintained by the fitting protrusion 140 of the lock spring 14 being in a fitted state with the first fitting-receiving portion 78 (first fitted state). When the fitting protrusion 140 of the lock spring 14 is in a fitted state with the second fitting-receiving portion 79 (second fitted state), the operation plate 7 is in a second position, and the windproof hook F is in an operated state (the claw portion 4 is in a locked position). The second position of the operation plate 7 is maintained by the fitting protrusion 140 of the lock spring 14 being in a fitted state with the second fitting-receiving portion 79 (second fitted state). The first and second mated states can be released by placing a finger on the rising piece 74 of the operation plate 7 and manually sliding the operation plate 7. When the operation plate 7 slides back and forth between the first position and the second position, the mating protrusion 140 of the lock spring 14 comes into sliding contact with the bottom edge 704 of the recess 701 (see FIGS. 13 and 14).

[0047] As shown in FIG. 20 , a first indicator G is provided on the upper surface of the face 70 of the operation panel 7, positioned adjacent to each other in the front-to-rear direction, at the front, and a second indicator R is provided on the rear. The first indicator G indicates that the windproof hook F is in an inoperative state, and the second indicator R indicates that the windproof hook F is in an activated state. The first indicator G and the second indicator R are visually distinguishable. Typically, the first indicator G and the second indicator R are distinguishable by color. In this embodiment, the first indicator G is a green sticker, and the second indicator R is a red sticker. Note that the color stickers are merely examples, and the first indicator G and the second indicator R may be formed by applying paint of a predetermined color to a predetermined area of the face 70. The paint may be fluorescent paint or phosphorescent paint. The first indicator G and the second indicator R may also be distinguishable by symbols or letters.

[0048] [B-6] Bottom plate As shown in FIG. 8 , the bottom plate 8 includes a bottom surface portion 80 and a first side wall 81 and a second side wall 82 that rise up oppositely from the side edges of the bottom surface portion 80. The first side wall 81 includes a vertical leading edge 810 and a locking protrusion 811 formed at its rear end. The second side wall 82 includes a vertical leading edge 820 and a locking protrusion 821 formed at its rear end. The lengths of the first side wall 81 and the second side wall 82 are shorter than the length of the bottom surface portion 80. The bottom surface portion 80 includes a front portion 80A located forward of the leading edges 810 and 820 of the first side wall 81 and the second side wall 82, an intermediate portion 80B corresponding to the first side wall 81 and the second side wall 82, and a rear portion 80C located behind the first side wall 81 and the second side wall 82. A protrusion 83 with a curved periphery protrudes from the tip of the bottom surface portion 80 (front side portion 80A). A rising piece 84, a horizontal piece 85, and a hanging piece 86 are formed on the rear end side of the bottom surface portion 80 (rear side portion 80C). If the slat 10 is biased in the width direction of the opening when the shutter is opened or closed or when the opening is fully closed, the protrusion 83 may come into contact with the inner surface of the bottom wall 32 of the guide rail 3, but the curved periphery of the protrusion 83 slides against the inner surface of the bottom wall 32 and the bottom piece 231 (tapers 2310, 2311), allowing the shutter to open and close smoothly.

[0049] Slits 87 are formed between the front portions of the first side wall 81 and the second side wall 82 and the bottom surface portion 80. Openings or cutout portions 801 are formed in the bottom surface portion 80 at positions on the sides of the base end of the front portion 80A and the middle portion 80B, and the slits 87 are formed integrally with the cutout portions 801 at the base end of the front portion 80A. Screw holes 812 and 822 are formed in the front end sides of the first side wall 81 and the second side wall 82.

[0050] A concave cutout for mounting the lock spring 14 is formed in the rear half of the second side wall 82. Projections 823, 823 are formed close to both ends of the bottom edge of the concave cutout, and engagement portions 824, 824 are formed adjacent to the front and rear sides of the projecting pieces 823, with a space 825 being formed between the projecting pieces 823. The lock spring 14 is a leaf spring and includes a protruding fitting protrusion 140, narrow pieces 141, 141 located on both sides of the fitting protrusion 140, and curved locking pieces 142, 142 at the tips of the narrow pieces 141, 141. The locking pieces 142, 142 are locked to the locked portions 824, 824, and the narrow pieces 141, 141 and the fitting protrusion 140 are positioned inside the second side wall 82, with the fitting protrusion 140 attached so as to protrude inward, and the fitting protrusion 140 is located in a recess 701 on the side edge 700 of the face portion 70 of the operation plate 7 (see FIG. 12, etc.). When the fitting protrusion 140 of the lock spring 14 climbs over the first protrusion 76 and the second protrusion 77, the fitting protrusion 140 enters the space 825.

[0051] The operation plate 7, intermediate plate 5, and compression plate 6 are housed in a space surrounded by the bottom surface portion 80 of the bottom plate 8 and the first and second side walls 81 and 82, and are slidable in the length direction of the bottom surface portion 80. The width dimension of the surface portion 50 of the intermediate plate 5 is smaller than the dimension between the inner surfaces of the first and second side walls 81 and 82, and the dimension between the tips of the pair of protrusions 57 is approximately the same as (slightly smaller than) the dimension between the inner surfaces of the first and second side walls 81 and 82, allowing them to slide relative to the first and second side walls 81 and 82. The width dimension of the surface portion 60 of the compression plate 6 and the width dimension of the surface portion 70 of the operation plate 7 are approximately the same as (slightly smaller than) the dimension between the first and second side walls 81 and 82, allowing them to slide relative to the first and second side walls 81 and 82. The width dimension of the wide portion 51 at the tip side of the intermediate plate 5 is larger than the dimension between the inner surfaces of the first side wall 81 and the second side wall 82, and is approximately the same as the dimension between the outer surfaces of the first side wall 81 and the second side wall 82.

[0052] When the intermediate plate 5 is set on the bottom plate 8, the tip edges 810, 820 of the first side wall 81 and the second side wall 82 abut against the outer surface of the second rising piece 53 of the intermediate plate 5, and the hanging piece 72 at the base end of the face portion 70 of the operating plate 7 set on the intermediate plate 5 approximately coincides with the rear ends of the first side wall 81 and the second side wall 82.

[0053] [B-7] Lid plate As shown in FIG. 9 , the cover plate 9 includes a rectangular top surface portion 90 in a plan view, a hanging wall 91 at the base end of the top surface portion 90, and first and second side walls 92 and 93 hanging from both widthwise edges of the top surface portion 90, with the tip end open. The length of the cover plate 9 is shorter than the length of the bottom plate 8 and longer than the length of the side walls 81 and 82 of the bottom plate 8. An opening 94 is formed at the tip end of the top surface portion 90, and an opening 95 is formed at the base end of the top surface portion 90. U-shaped insertion holes 920 and 930 are formed in the first and second side walls 92 and 93, respectively, at positions rearward of the opening 94 of the top surface portion 90. A recess 910 is formed by cutting out the lower end of the hanging wall 91 at the base end. The width of the recess 910 is slightly larger than the width of the rear surface portion 73 of the operation plate 7.

[0054] The rising piece 44 of the base end portion of the claw 4 is positioned in the opening 94. The rising piece 44 of the claw 4 moves in the front-to-rear direction within the opening 94 when the claw 4 moves. The opening 94 has a first edge 940 on the rear side and a second edge 941 on the front side, and when the operation plate 7 is in the first position, the rising piece 44 is close to or in contact with the first edge 940, and when the operation plate 7 moves in the first direction, the rising piece 44 moves forward within the opening 94 and comes into contact with the second edge 941.

[0055] The opening 95 is configured so that a portion of the surface 70 of the operation plate 7 is exposed, and when the operation plate 7 is in the first position, the first display part G is positioned at the opening 95 and exposed, and when the operation plate 7 is in the second position, the second display part R is positioned at the opening 95 and exposed.

[0056] The distance between the inner surfaces of the first side wall 92 and the second side wall 93 of the cover plate 9 is slightly larger than the distance between the outer surfaces of the first side wall 81 and the second side wall 82 of the bottom plate 8, and the cover plate 9 is placed over the bottom plate 8 to form a case for the wind-resistant hook F. Locking holes 96 are formed in the upper halves of both widthwise ends of the hanging wall 91, and locking projections 811, 821 at the rear ends of the first side wall 81 and the second side wall 82 of the bottom plate 8 are locked into the locking holes 96, thereby positioning the cover plate 9 in the longitudinal direction of the bottom plate 8. At this time, the insertion holes 920, 930 in the first side wall 92 and the second side wall 93 of the cover plate 9 are aligned with the screw holes 812, 822 in the first side wall 81 and the second side wall 82 of the bottom plate 8, respectively, and the first side wall 92 and the second side wall 93 of the cover plate 9 are fixed to the first side wall 81 and the second side wall 82 of the bottom plate 8 by the screws 17.

[0057] [B-8] Assembly of wind-resistant hooks The intermediate plate 5, claw portion 4, compression plate 6, operation plate 7, first coil spring 12, second coil spring 13, and lock spring 14 are arranged and set on the bottom plate 8, and then the cover plate 9 is placed on top to store these elements inside the case made up of the bottom plate 8 and the cover plate 9, thereby forming a wind-resistant hook unit. When set up, the claw portion 4 is in the stored position and the operation plate 7 is in the first position, and the cover plate 9 is placed on top and fixed to the bottom plate 8, thereby fixing the positions of the elements.

[0058] The width dimension of the wide portion 51 of the intermediate plate 5 is larger than the dimension between the inner surfaces of the first side wall 81 and the second side wall 82 of the bottom plate 8, and is located on the tip side of the tips of the first side wall 81 and the second side wall 82. The dimension between the protruding pieces 57 of the intermediate plate 5 is approximately the same as the dimension between the inner surfaces of the first side wall 81 and the second side wall 82 of the bottom plate 8, and the intermediate plate 5 can slide in the length direction with the face portion 50 placed on the upper surface of the bottom surface portion 80. The intermediate plate 5 is set with the face portion 50 placed on the bottom surface portion 80 of the bottom plate 8, and the outer surfaces of the rising pieces 53 at both widthwise ends of the tip side wide portion 51 abutting against the tip edges 810, 820 of the first side wall 81 and the second side wall 82 of the bottom plate 8. From this state, the intermediate plate 5 can slide forward.

[0059] The claw 4 is positioned so that the bent portion of the main body (front portion 40 and rear portion 41) abuts against the front portion 80A of the bottom surface 80 of the bottom plate 8, and the base end portion (the corner formed by the base end portion 41' of the rear portion 41 and the hanging piece 43) is engaged with the pair of rising pieces 52 at the tip end portion of the intermediate plate 5. The hanging piece 43 and the rising piece 44 at the base end portion of the claw 4 are inclined with respect to the bottom surface (wide portion 51) of the recessed groove 58, and the pair of hanging pieces 43 are received in the recessed groove 58 with some play. From this state, the claw 4 can slide forward while the bent portion of the main body is in sliding contact with the front portion 80A of the bottom surface 80 of the bottom plate 8, and can also rotate so as to rise up from the front portion 80A.

[0060] The width dimension of the face portion 70 of the operation plate 7 is approximately the same as the dimension between the inner surfaces of the first side wall 81 and the second side wall 82 of the bottom plate 8, and the lower end portion of the inner surface of the hanging piece 71 abuts against the front edge 570 of the protruding piece 57 of the intermediate plate 5, the lower end abuts against the upper surface of the bottom surface portion 80 of the bottom plate 8, and the rear surface portion 73 abuts against the upper surface of the bottom surface portion 80 of the bottom plate 8. At this time, the upper surface of the face portion 70 of the operation plate 7 extends horizontally.

[0061] When the first coil spring 12 is stretched from its natural length in which no external force is acting, its tip is connected to the connecting portion 711 of the operating plate 7 and its base end is connected to the connecting portion 540 of the intermediate plate 5, and part of the upper side of the first coil spring 12 is located in the opening 75 of the face portion 70 and part of the lower side is located in the opening 55 of the face portion 50.

[0062] The first position of the operation plate 7 is locked by fitting the fitting protrusion 140 of the lock spring 14 attached to the second side wall 82 of the bottom plate 8 into the first fitting receiving portion 78 on the side edge 700 of the face portion 70 of the operation plate 7 to establish a first fitted state. From this state, the operation plate 7 can be slid forward by releasing the first fitted state.

[0063] The width of the compression plate 6 is approximately the same as the distance between the inner surfaces of the first side wall 81 and the second side wall 82 of the bottom plate 8, and the left and right ends of the distal end portion are placed on the upper ends of the rising pieces 53 that form the recessed grooves 58, and the lower ends of the hanging pieces 62 are in contact with the upper surface of the surface 50 of the intermediate plate 5. At this time, the surface 60 of the compression plate 6 extends horizontally.

[0064] When the second coil spring 13 is stretched from its natural length when no external force is acting, its tip is connected to the connecting portion (rising piece 56) of the intermediate plate 5 and its base end is connected to the connecting portion 620 of the compression plate 6, and part of the upper side of the second coil spring 13 is located in the opening 63 of the face portion 60 and part of the lower side is located in the opening 55 of the face portion 50.

[0065] The compression plate 6 is in contact with the inclined rising piece 44 at the base end side of the claw portion 4 so that the contact portion 61 at the tip thereof presses it forward. From this state, the compression plate 6 can slide forward integrally with the operation plate 7 and the intermediate plate 5.

[0066] With the intermediate plate 5, claw portion 4, operation plate 7, and compression plate 6 set on the bottom plate 8, the cover plate 9 is placed on top, and the locking projections 811, 821 at the rear ends of the first side wall 81 and the second side wall 82 of the bottom plate 8 are locked into the locking holes 96 to position the cover plate 9. The first side wall 92 and the second side wall 93 of the cover plate 9 are then fixed to the first side wall 81 and the second side wall 82 of the bottom plate 8 with screws 17. The width dimension of the wide portion 51 of the intermediate plate 5 is approximately the same as (slightly smaller than) the dimension between the inner surfaces of the first side wall 92 and the second side wall 93 of the cover plate 9, and both widthwise end edges of the wide portion 51 of the intermediate plate 5 are in sliding contact with the inner surfaces of the first side wall 92 and the second side wall 93 of the cover plate 9. The widthwise end edges of the projections 57 of the intermediate plate 5 are in sliding contact with the inner surfaces of the first side wall 81 and the second side wall 82 of the bottom plate 8. Therefore, the front side of the intermediate plate 5 is in sliding contact with the inner surface of the case, and the rear side is in sliding contact with the inner surface of the case, allowing it to slide stably relative to the case. The rear surface portion 73 of the operation plate 7 extends rearward through the recess 910, and the raised piece 74 serves as a finger hook when sliding the operation plate 7. A portion of the claw portion 4 is located forward of the leading edge 900 of the top surface portion 90, the leading edge 921 of the first side wall 92, and the leading edge 931 of the second side wall 93. The raised piece 44 of the base end portion of the claw portion 4 is located on the side closer to the first edge 940 of the opening 94. The top surface portion 90 of the cover plate 9 and the surface portion 70 of the operation plate 7 are closely opposed to each other, and the first display portion G of the surface portion 70 of the operation plate 7 is exposed in the opening 95. A scratch-proof seal 97 is attached to the surface of the base end portion of the case so as to cover the top surface 90, the first side wall 92, and the second side wall 93, preventing direct contact between the case surface and the slats 10 when the shutter curtain 1 is rolled up.

[0067] [B-9] Mounting plate The movable wind-resistant hook F is attached to the longitudinal end of the slat 10 via a mounting plate 15. As shown in Figure 10, the mounting plate 15 consists of a surface 150 that is rectangular in plan view. The surface 150 has side edges 1500, 1500 extending in the longitudinal direction and a front edge 1501, and a pair of slide locking pieces 151 are formed in a rising shape located forward of the midpoint in the longitudinal direction of the side edges 1500, 1500. A rising piece 152 is formed on the rear end of the surface 150, and a rear piece 153 is formed extending rearward from the rising piece 152, and a screw hole 154 is formed in the rear piece 153.

[0068] As shown in Figure 17, the slat 10 comprises a surface portion 100 of a predetermined height, an upper interlocking portion 101 integrally formed at the upper end of the surface portion 100, and a lower interlocking portion 102 integrally formed at the lower end of the surface portion 100, and the surface portion 100 has a bulging or substantially trapezoidal shape in a side view or cross-sectional view. In this specification, the bulging side is referred to as the front side, and the recessed side is referred to as the back side. A space is formed on the back side of the slat 10, and a wind-resistant hook F is attached so as to fit into this space.

[0069] The installation of the wind-resistant hook F according to this embodiment will be described with reference to Figures 17 and 18. As shown in Figure 17, the back surface of the face portion 150 of the mounting plate 15 is abutted against the back surface of the face portion 100 of the slat 10, and the front edge 1501 of the mounting plate 15 is aligned with the longitudinal edge 103 of the slat 10 and fixed with rivets 155.

[0070] The wind-resistant hook F is attached to the mounting plate 15, which is attached to the rear end of the slat 10 in the longitudinal direction. As shown in Figures 17 and 18 (upper diagram), the bottom surface 80 of the bottom plate 8 of the wind-resistant hook F is temporarily attached from the front to the surface of the face portion 150 of the mounting plate 15. At this time, the pair of slide locking pieces 151 are inserted into the slits 87 formed in the bottom surface 80, and the bottom surface 80 is abutted against the surface of the face portion 150. The rivet 155 is located within the notch 801 formed in the bottom surface 80. The rear rising piece 84 of the bottom surface 80 abuts against the rear rising piece 152 of the face portion 150 of the mounting plate 15, and the horizontal piece 85 abuts against the rear piece 153.

[0071] 18 upper view, by sliding the wind-resistant hook F toward the tip relative to the mounting plate 15, the slit 87 moves relative to the slide locking piece 151, and the slide locking piece 151 and the slit 87 engage, resulting in the state shown in the bottom view of FIG. 18. In the bottom view of FIG. 18, the tip edge 800 of the bottom surface portion 80 of the wind-resistant hook F coincides with the longitudinal edge 103 of the slat 10, and the protruding piece 83 protrudes from the longitudinal edge 103 of the slat 10. The screw hole 154 in the rear piece 153 and the insertion hole 850 in the horizontal piece 85 coincide with each other, and the rear end portion of the wind-resistant hook F and the rear end portion of the mounting plate 15 are fixed with the screw 18. In the bottom view of FIG. 18 lower view, the rivet 155 is located approximately in the center of the cutout portion 801. To remove the wind-resistant hook F, remove the screw 18 and slide the wind-resistant hook F relative to the mounting plate 15 in a direction that releases the engagement between the slide locking piece 151 and the slit 87. By attaching the wind-resistant hook F to the slat 10 via the mounting plate 15, the wind-resistant hook F can be easily replaced.

[0072] [B-10] Hook holder A hook receiver 16 capable of engaging an activated wind-resistant hook F is provided inside the guide rail 3. As shown in FIGS. 2 and 21(C), the guide rail 3 is attached to the main frame or wall W via a guide rail base member 3' in a protruding manner. The guide rail 3 has a U-shaped cross section, consisting of opposing first and second side walls 30 and 31, and a bottom wall 32 connecting the base ends of the first and second side walls 30 and 31. The second side wall 31 is fixed to the guide rail base member 3'. A guide groove 35 for receiving the longitudinal end of the slat 10 is formed between a front portion 33 of the first side wall 30 and a front portion 34 of the second side wall 31. Inside the guide rail 3, a space extending from the guide groove 35 to the bottom wall 32 with the same width serves as a slat end receiving space. In this embodiment, the hook receiver 16 is located at a predetermined height of the guide rail 3 and fixed to the inner surface of the first side wall 30 of the guide rail 3. The hook receiver 16 is provided inside the guide rail 3, but is not located in the slat end receiving space, and does not affect the opening and closing operation of the shutter curtain 1. Note that the shutter according to this embodiment is wound forward, but in the case of a reverse winding shutter, the first side wall 30 is fixed to the guide rail base material 3' instead of the second side wall 1 of the guide rail 3. Therefore, in the case of a forward winding shutter, the hook receiver 16 is located on the side of the shutter core that is farther from the guide rail base material 3', but in the case of a reverse winding shutter, the hook receiver 16 is located on the side of the shutter core that is closer to the guide rail base material 3'.

[0073] As shown in FIG. 11 , the hook receiver 16 has an L-shape in plan view or cross section, with a first edge 160 extending in the forward direction of the guide rail 3 and a second edge 161 extending in the forward direction of the guide rail 3. The first edge 160 is fixed to the inner surface of the first side wall 30 of the guide rail 3, and the second edge 161 extends in the forward direction from the first side wall 30 inside the guide rail 3. In this embodiment, the hook receiver 16 is fixed to the first side wall 30 at two points, one above the other, but it may be fixed at three or more points. The width of the second edge 161 is such that the second edge 161 does not interfere with the longitudinal end of the slat 10 received inside the guide rail 3. The hook receivers 16 are fixed at heights corresponding to the heights of the wind-resistant hooks F when the opening is fully closed. In this embodiment, one hook receiver 16 is provided for each wind-resistant hook F. As shown in FIG. 1 , four hook receivers 16 are provided on each side. The hook receiver 16 is an elongated member having a predetermined height, which is greater than the height of the slat 10 in this embodiment.

[0074] An upper surface 162 is formed at the upper end of the hook receiver 16, and a lower surface 163 is formed at the lower end. The upper surface 162 and the lower surface 163 are rectangular in plan view, and have a larger projection dimension than the first side 160, but have approximately the same projection dimension as the second side 161, so as not to interfere with the raising and lowering of the shutter curtain 1 under normal circumstances. When the claw portion 4 in the locked position moves upward, it comes into contact with the upper surface 162, restricting further upward movement of the shutter curtain 1. The hook receiver 16 according to this embodiment has a vertically symmetrical shape, and when it is turned upside down, the lower surface 163 functions as the abutting portion. If it is not intended to be used upside down, the lower surface 163 is an optional element. The hook receiver 16 is formed integrally by bending a plate material of a predetermined shape.

[0075] [C] Wind-resistant hook operation The operation plate 7, intermediate plate 5, and compression plate 6 are housed in a case made up of a bottom plate 8 and a cover plate 9 so as to be movable in the front-to-rear direction, and the claw portion 4 is movable between a stored position and a locked position in conjunction with the sliding operation of the operation plate 7. The operation of each element of the wind-resistant hook F will be described in detail with reference to Figures 12 to 16. Note that Figures 12 to 16 are merely examples of the position and location of each element of the wind-resistant hook F according to this embodiment, and the description of the position and location of each element should not be construed as limiting the present invention.

[0076] FIG. 12 shows a state in which the operating plate 7 is in the first position and the claw portion 4 of the wind-resistant hook is in the retracted position. The claw portion 4, intermediate plate 5, compression plate 6, and operating plate 7 are located on the proximal side. FIG. 15 shows a state in which the operating plate 7 is in the second position and the claw portion 4 of the wind-resistant hook is in the locked position. The claw portion 4, intermediate plate 5, compression plate 6, and operating plate 7 are located on the distal side. FIG. 13 shows a state in which the claw portion 4, intermediate plate 5, compression plate 6, and operating plate 7 have moved forward from the state in FIG. 12, and the raised piece 44 of the proximal portion of the claw portion 4 abuts against the second edge 941 of the opening 94. FIG. 14 shows a state in which the intermediate plate 5 and operating plate 7 have moved forward from the state in FIG. 13, and the claw portion 4 has rotated, resulting in the state in FIG. 15 from the state in FIG. 14. The state shown in FIG. 12 to the state shown in FIG. 15 is a series of operations. FIG. 16 is a diagram showing a state in which a force is applied to push the claw portion 4 in the state shown in FIG.

[0077] [C-1] Wind-resistant hook in inoperative state 12, the claw portion 4 is in the stored position, and the wind-resistant hook F is in an inoperative state. The position and posture of each element when the wind-resistant hook F is in an inoperative state will be described. The body of the claw portion 4 is such that the bent portions of the front portion 40 and the rear portion 41 abut against the upper surface of the front portion 80A of the bottom surface 80 of the bottom plate 8, and the front portion 40 and the rear portion 41 extend so as to rise at an angle from the upper surface of the front portion 80A of the bottom surface 80. The hanging piece 43 and the rising piece 44 at the base end portion of the claw portion 4 are in an inclined position relative to the bottom of the recessed groove 58 in a side view, with the upper end of the rising piece 44 facing forward and the lower end of the hanging piece 43 facing backward. The tip end portion of the front portion 40 and the locking piece 42 are located more tip-side than the tip edge 900 of the cover plate 9, the tip edge 921 of the first side wall 92, and the tip edge 931 of the second side wall 93, and the locking piece 42 of the claw portion 4 is located inside the tip edge 800 of the bottom surface portion 80, and the tip of the locking piece 42 is at approximately the same height as the top surface portion 90 of the cover plate 9. The tip end edge 800 and the protruding piece 83 of the bottom surface portion 80 of the bottom plate 8 are located in front of the tip end portion of the front portion 40 of the claw portion 4 and the locking piece 42.

[0078] The rising piece 44 of the claw portion 4 is in contact with or close to the first edge 940 of the opening 94. The hanging piece 43 of the claw portion 4 is positioned slightly spaced distally from the rising piece 53 at the distal end portion of the intermediate plate 5, and the hanging piece 43 and / or the base end portion 41' of the rear portion 41 is in contact with or close to the rising piece 52. In one embodiment, the corner formed by the base end side of the hanging piece 43 and the base end portion 41' of the rear portion 41 engages with the upper end of the rising piece 52. Note that the hanging piece 43 may be close to or in contact with the rising piece 53 at the distal end portion of the intermediate plate 5.

[0079] The lower surface of the distal end portion of face portion 60 of compression plate 6 abuts against the upper end of rising piece 53 of the distal end portion of intermediate plate 5, and abutment portion 61 abuts against rising piece 44, which is inclined at the proximal end portion of claw portion 4, pressing rising piece 44 toward the distal end. Distance edges 810, 820 of first side wall 81 and second side wall 82 of bottom plate 8 abut against the outer surface of rising piece 53 formed on wide portion 51 on the distal side of intermediate plate 5. With face portion 50 of intermediate plate 5 received in recess 710, the inner surface of hanging piece 71 abuts against front edge 570 of protruding piece 57 of intermediate plate 5. The fitting protrusion 140 of the lock spring 14 is in a fitted state (first fitted state) with the first fitting receiving portion 78 formed on the side edge 700 of the face portion 70 of the operation plate 7, and the operation plate 7 is held in a first position. In other words, the non-operating state shown in Fig. 12 is locked. In the state of Fig. 12, the operation plate 7, intermediate plate 5, compression plate 6, and claw portion 4 are located on the base end side, and by releasing the locked state, they can be moved toward the tip side (first direction).

[0080] The operation plate 7 and the intermediate plate 5 are connected by a first coil spring 12, and when the operation plate 7 in the first position is moved in a first direction, the tip side of the first coil spring 12 moves in the first direction, and the base side of the first coil spring 12 moves in the first direction, causing the base side of the intermediate plate 5 to move in the first direction. At this time, the first coil spring 12 moves while maintaining its length (without stretching) due to the biasing force. When the tip side of the intermediate plate 5 moves in the first direction, the base side portion of the claw portion 4 loosely fitted in the recessed groove 58 moves in the first direction.

[0081] The operation plate 7 and compression plate 6 are connected by second coil springs 13, and when the operation plate 7 is moved in a first direction, the tip side of the second coil springs 13 moves in the first direction, and the base end side of the second coil springs 13 moves in the first direction via the intermediate plate 5, causing the base end side of the compression plate 6 to move in the first direction. The compression plate 6 moves in the first direction while maintaining the abutment portion 61 at the tip in abutment against the base end portion of the rising piece 44 of the claw portion 4.

[0082] The first coil spring 12 and the second coil spring 13 are formed from the same tension coil spring, and in the state shown in FIG. 12, the length of the first coil spring 12 is slightly longer than the length of the second coil spring 13. That is, the force (biasing force) of the first coil spring 12 returning to its original length is greater than the force (biasing force) of the second coil spring 13 returning to its original length. The biasing force of the first coil spring 12 counters the force that causes the first coil spring 12 to expand, and the biasing force of the second coil spring 13 counters the force that causes the second coil spring 13 to expand. The biasing force of the first coil spring 12 is related to the rotational return force of the claw portion 4 to the locked position in the state shown in FIG. 16; if this rotational return force is to be increased, the biasing force of the first coil spring 12 should be increased. The biasing force of the second coil spring 13 is related to the force with which the compression plate 6 presses the base end portion of the claw portion (the rising piece 44) forward, and if this pressing force needs to be increased, the biasing force of the second coil spring 13 should be increased (within a range that does not exceed the biasing force of the first coil spring 12 at the initial stage). The biasing forces of the first coil spring 12 and the second coil spring 13 can be changed by changing the connection positions of the first coil spring 12 and the second coil spring 13 or by changing the type of spring. For example, by positioning the leading edge 570 of the intermediate plate 5 further forward, the first coil spring 12 can be stretched further when set, thereby increasing the biasing force.

[0083] [C-2] Movement from inactive to active In the state shown in Figure 12, when the operating plate 7 is slid in the first direction, the operating plate 7, intermediate plate 5, and compression plate 6 move together in the first direction until the rising piece 44 on the base end side of the claw portion 4 abuts the second edge portion 941 on the tip side of the opening 94, resulting in the state shown in Figure 13.

[0084] When changing from the state shown in FIG. 12 to the state shown in FIG. 13, the claw portion 4 slides in the first direction while maintaining the stored posture shown in FIG. In the state shown in Figure 12, the tip (upper end) of the rising piece 52 at the tip side portion of the intermediate plate 5 abuts against the base side portion of the claw portion 4 (base side portion 41' of the rear portion 41), and the abutment portion 61 at the tip of the compression plate 6 presses the base side portion (rising piece 44) of the claw portion 4 toward the tip side.When the intermediate plate 5 slides in the first direction in this state, the tip (upper end) of the rising piece 52 at the tip side portion of the intermediate plate 5 moves in the first direction while abutting against the base side portion 41' of the rear portion 41 of the claw portion 4, and the compression plate 6 moves in the first direction integrally with the intermediate plate 5, and the abutment portion 61 at the tip of the compression plate 6 presses the rising piece 44 of the claw portion 4 toward the tip side, and the rising piece 44 at the base side portion of the claw portion 4 abuts against the second edge 941 of the opening 94, resulting in the state shown in Figure 13. In conjunction with the continued sliding movement of the operation plate 7 in the first direction, the operation plate 7 further moves from the state in Figure 13 to the state in Figure 14 to the second position, entering the second engaged state and activating the wind-resistant hook F in Figure 15. In conjunction with the sliding movement of the operation plate 7 in the first direction from the first position to the second position, the intermediate plate 5 slides in the first direction (forward), and the outer surfaces of the pair of rising pieces 53 on the tip side of the intermediate plate 5 move away from the tip edge 810 of the first side wall 81 of the bottom plate 8 and the tip edge 820 of the second side wall 82.

[0085] 13, the claw portion 4, intermediate plate 5, compression plate 6, and operation plate 7 are positioned closer to the tip end relative to the bottom plate 8 and cover plate 9 than in the state of FIG. 12. In the state of FIG. 13, the abutment portion 61 at the tip end of the compression plate 6 abuts against and presses the rising piece 44 of the claw portion 4 that is abutting against the second edge portion 941, restricting further movement toward the tip end. When the movement of the rising piece 44 at the base end portion of the claw portion 4 in the first direction is restricted and the tip end portion of the intermediate plate 5 (the portion having the groove 58) slides in the first direction, the hanging piece 43 at the base end portion of the claw portion 4 is received in the groove 58 with some play and is able to rotate within the groove 58.Therefore, the base end portion of the claw portion 4 (the base end portion 41' of the rear portion 41, and / or the hanging piece 43) is pushed forward by the tip end portion of the intermediate plate 5 (the rising piece 52, and / or the rising piece 53), and the claw portion 4 rotates so that the main body (the front portion 40 and the rear portion 41) rises from the bottom portion 80, with the rising piece 44 abutting the second edge portion 941 as a fulcrum. When the operating plate 7 and the intermediate plate 5 move from the state shown in Figure 12 to the state shown in Figure 13, the abutment portion 61 of the pressure plate 6 constantly presses the rising piece 44 at the base end portion of the claw portion 4 forward, so that the claw portion 4 does not rotate but slides forward while maintaining the posture shown in Figure 12.

[0086] 12 and 13, the hanging piece 43 and the rising piece 44 at the base end portion of the claw portion 4 are inclined relative to the front side portion 80A of the bottom surface 80 and the bottom surface (wide portion 51) of the recessed groove 58, but as the main body of the claw portion 4 rotates away from the front side portion 80A of the bottom surface 80, the angle of inclination of the hanging piece 43 and the rising piece 44 at the base end portion relative to the front side portion 80A of the bottom surface 80 and the bottom surface (wide portion 51) of the recessed groove 58 increases. When the operation plate 7 continues to move in the first direction from the state of FIG. 13, the tip end portion of the intermediate plate 5 (the portion including the recessed groove 58) moves in the first direction relative to the claw portion 4 in which the rising piece 44 abuts against the second edge portion 941 of the opening 94, and the rising piece 44 and the hanging piece 43, which were in an inclined position, rotate to a vertical position with the rising piece 44 as a fulcrum. 14 , in the process of the hanging piece 43 and the rising piece 44 at the base end portion of the claw portion 4 rotating from an inclined position to a vertical position, the front portion 40 and the tip-side locking piece 42 of the claw portion 4 rise from the front portion 80A of the bottom surface portion 80, and the hanging piece 43 and the rising piece 44 assume a vertical position along the inner surface of the rising piece 53 at the tip end portion of the intermediate plate 5, and when the rear portion 41 assumes a horizontal position, the claw portion 4 assumes the locking position. When the hanging piece 43 and the rising piece 44 at the base end portion of the claw portion 4 are in the vertical position, the hanging piece 43 abuts or is close to the inner surface of the rising piece 53 at the tip end portion of the intermediate plate 5, and the lower surface of the rear portion 41 is spaced apart from the upper end of the rising piece 52 at the tip end portion of the intermediate plate 5.

[0087] In this embodiment, when the state changes from FIG. 12 to FIG. 14 , the second coil spring 13 elongates slightly, while the length of the first coil spring 12 remains substantially unchanged. When the state changes from FIG. 14 to FIG. 15 , the second coil spring 13 continues to elongate, and the first coil spring 12 also elongates (at this stage, the elongation of the second coil spring 13 is greater than that of the first coil spring 12). When the operation plate 7 slides in the first direction after the rising piece 44 on the base end side of the claw 4 abuts against the second edge portion 941 on the tip side of the opening 94, the intermediate plate 5 slides in the first direction. At this time, the compression plate 6 slides relative to the intermediate plate 5, and the second coil spring 13 connecting the compression plate 6 and the intermediate plate 5 is pulled, increasing its biasing force. This force acts to maintain the engagement position of the claw 4.

[0088] 12, when a finger is hooked on the rising piece 74 of the operation plate 7 and a force is applied to move the operation plate 7, which is in the first position, in a first direction, the first fitted state between the fitting protrusion 140 of the lock spring 14 and the first fitting receiver 78 is released. When the operation plate 7 slides in the first direction to change from the state of FIG. 12 to the state of FIG. 15, the fitting protrusion 140 of the lock spring 14 provided on the second side wall 82 of the bottom plate 8 comes into sliding contact with the bottom edge 704 of the recess 701 provided in the side edge 700 of the face portion 70 of the operation plate 7, and when the operation plate 7 reaches the second position, the fitting protrusion 140 of the lock spring 14 fits into the second fitting receiver 79, resulting in a second fitted state, and the operation plate 7 is maintained in the second position.

[0089] [C-3] Wind-resistant hook operation status 15, the claw portion 4 is in the locked position and the wind-resistant hook F is in the activated state. The posture and position of each element when the wind-resistant hook F is in the activated state will be described. The main body of the claw portion 4 is such that the bent portions of the front portion 40 and rear portion 41 rise up so as to be separated from the front portion 80A of the bottom surface 80 of the bottom plate 8, and the rear portion 41 extends approximately parallel to the upper surface of the front portion 80A of the bottom surface 80.

[0090] The hanging piece 43 and the rising piece 44 at the base end portion of the claw portion 4 abut against or are close to the inner surface of the second rising piece 53 at the tip end portion of the intermediate plate 5, and are in a substantially vertical position with respect to the bottom (wide portion 51) of the recessed groove 58. The rising piece 44 at the base end portion of the claw portion 4 abuts against the second edge portion 941 of the opening 94 in the upper surface portion 90 of the cover plate 9, and the upper surface of the rear portion 41, which is in a horizontal position, abuts against or is close to the lower surface of the upper surface portion 90 of the cover plate 9.

[0091] The lower surface of the rear portion 41 in the horizontal position is spaced apart from the upper end of the rising piece 52 at the tip end portion of the intermediate plate 5. The entire front portion 40 is located more tip-side than the tip edge 900 of the cover plate 9, the tip edge 921 of the first side wall 92, and the tip edge 931 of the second side wall 93, and the locking piece 42 extends in a folded-back manner from the tip of the front portion 40. The positional relationship between the locking piece 42 of the claw portion 4 in the locked position and the hook receiver 16 will be described later. The tip of the claw portion 4 (the bent portion consisting of the base end of the locking piece 42 and the tip of the front portion 40) is in approximately the same position as the tip of the protruding piece 83.

[0092] The distal end portion of the surface 60 of the compression paddle 6 is located rearward of the upper end of the rising piece 53 at the distal end portion of the intermediate plate 5, and the abutment portion 61 abuts against the vertically oriented rising piece 44 at the proximal end portion of the claw 4, pressing the rising piece 44 against the second edge 941 of the opening 94. The compression paddle 6 slides relative to the intermediate plate 5, and the second coil spring 13 connecting the compression paddle 6 and the intermediate plate 5 is pulled, increasing the biasing force. This force acts to maintain the engagement position of the claw 4. As shown in FIG. 15 , the lower surface of the widthwise central portion on the distal side of the surface 60 of the compression paddle 6 rests on the upper end of the rising piece 56, maintaining the horizontal position of the compression paddle 6.

[0093] The outer surface of the rising piece 53 formed on the wide portion 51 on the tip side of the intermediate plate 5 is spaced forward from the tip edges 810, 820 of the first side wall 81 and the second side wall 82 of the bottom plate 8 (different from the state in Figure 12). With the face portion 50 of the intermediate plate 5 received in the recess 710, the inner surface of the hanging piece 71 of the operation plate 7 abuts against the front edge 570 of the protruding piece 57 of the intermediate plate 5 (same as the state in Figure 12).

[0094] The fitting protrusion 140 of the lock spring 14 is in a fitted state (second fitted state) with the second fitting receiving portion 79 formed on the side edge 700 of the face portion 70 of the operation plate 7, and the operation plate 7 is held in the second position. That is, the locking position of the claw portion 4, i.e., the operating state of the wind-resistant hook F, is locked.

[0095] [C-4] Rotation of the claws when the wind-resistant hook is in operation 16 is a diagram showing a state in which, when claw portion 4 is in the locked position and wind-resistant hook F is in an activated state, a force is applied to claw portion 4 in the locked position to return said claw portion 4 to the stored position. When claw portion 4, which has rotated away from front portion 80A of bottom surface portion 80 of bottom plate 8, is pushed closer to front portion 80A, claw portion 4 rotates such that hanging portion 43 and rising portion 44 are inclined from the vertical position with rising portion 44 at the base end portion of claw portion 4 abutting second edge 941 of opening 94, and base end portion 41′ of rear portion 41 and / or hanging portion 43 abuts against the upper end of rising portion 52 at the tip end portion of intermediate plate 5 and / or hanging portion 43 abuts against rising portion 53, moving intermediate plate 5 rearward (as if pushing it into the case).

[0096] The abutment portion 61 of the compression plate 6 abuts against the rising piece 44, which is in an inclined position at the base end portion of the claw portion 4, and presses the rising piece 44 against the second edge portion 941 of the opening 94. However, since the intermediate plate 5 is pushed rearward, the length of the second coil spring 13, which was stretched in the state shown in Figure 15, is shortened in the state shown in Figure 16.

[0097] In the second position of the operation plate 7, the locked state is maintained by maintaining the mated state (second mated state) between the mating protrusion 140 of the lock spring 14 and the second mating-receiving portion 79, and as the intermediate plate 5 moves rearward, the front edge 570 of the protrusion 57 of the intermediate plate 5 moves rearward away from the depending piece 71 of the operation plate 7. At this time, the first coil spring 12 expands, and a force is applied to move the intermediate plate 5 in the first direction. The force that expands the first coil spring 12 (when moving from the state in FIG. 15 to the state in FIG. 16 ) is smaller than the force that disengages the mated state (second mated state) between the mating protrusion 140 of the lock spring 14 and the second mating-receiving portion 79. Therefore, the first coil spring 12 expands in conjunction with the movement of the intermediate plate 5 in the second direction, preventing the second mated state from being disengaged. When the force acting on the claw portion 4 is released, the intermediate plate 5 moves forward (in the first direction) due to the biasing force (compression force) of the first coil spring 12, and the claw portion 4 returns to the locking position shown in FIG.

[0098] [D] Wind-resistant hook according to another embodiment [D-1] Other embodiment 1 A wind-resistant hook F' according to another embodiment will be described with reference to FIGS. 28 and 29. The wind-resistant hook F' is similar to the wind-resistant hook F in that it includes a claw portion 4, an intermediate plate 5, a compression plate 6, an operation plate 7, a bottom plate 8, a cover plate 9, a first coil spring 12, a second coil spring 13, and a lock spring 14. The description of the wind-resistant hook F can be applied to the explanations and operations of these elements, except for the following differences. In the wind-resistant hook F, when the operation plate 7 is in the first position, the fitting protrusion 140 of the lock spring 14 and the first fitting receiving portion 78 formed on the side edge 700 of the face portion 70 of the operation plate 7 are fitted together (first fitted state), thereby maintaining the operation plate 7 in the first position. In the wind-resistant hook F', a third coil spring 24 is provided to maintain the operation plate 7 in the first position. Specifically, the front end of the third coil spring 24 is connected to the hanging piece 72 located on the rear side of the face portion 70 of the operation plate 7, and the rear end of the third coil spring 24 is connected to the hanging wall 91 of the cover plate 9. In the wind-resistant hook F', when the operation plate 7 in the first position moves in the first direction, the third coil spring 24 extends first, then the second coil spring 13 extends, and finally the first coil spring 12 extends. Figure 28 shows the wind-resistant hook F' in an inoperative state, with the operation plate 7 in the first position. Figure 29 shows the wind-resistant hook F' in an activated state, with the operation plate 7 in the second position. When the operation plate 7 is in the first position, the third coil spring 24 holds the operation plate 7 in the first position. When the operation plate 7 slides from the first position to the second position, the fitting protrusion 140 of the lock spring 14 fits into the fitting receptacle 79' formed on the side edge of the rear surface 73 of the operation plate 7, maintaining the operation plate 7 in the second position and locking the operation state of the wind-resistant hook F'. As the operation plate 7 slides from the first position to the second position, the third coil spring 24 expands and accumulates a force that returns it to its original length. In the state of Figure 29, when the engagement state at the second position is released and the operation plate 7 in the second position is slid to the first position, the third coil spring 24 assists the sliding movement of the operation plate 7 in the second direction, and the operation plate 7 is maintained in the first position by the third coil spring 24.

[0099] [D-2] Other embodiment 2 30 and 31, the wind-resistant hook F equipped with a stopper will be described. The wind-resistant hook F is similar to the wind-resistant hook F in that it includes a claw portion 4, an intermediate plate 5, a compression plate 6, an operation plate 7, a bottom plate 8, a cover plate 9, a first coil spring 12, a second coil spring 13, and a lock spring 14. The description of the wind-resistant hook F can be applied to the explanation and operation of these elements, except for the stopper (protrusion 730). The rear surface 73 of the operation plate 7 of the wind-resistant hook F is located outside the case (bottom plate 8, cover plate 9) of the wind-resistant hook F, and a low, disc-shaped protrusion 730 is formed at a predetermined position on the rear surface 73. This protrusion 730 functions as a stopper that prevents the operation plate 7 from being pushed in excessively when the wind-resistant hook F is activated. A detailed description will be given below.

[0100] FIG. 30 shows the wind-resistant hook F in an inoperative state, with the operation plate 7 in the first position. When the operation plate 7 is in the first position, the protrusion 730 protruding from the rear surface 73 of the operation plate 7 is spaced rearward from the hanging wall 91 of the case of the movable wind-resistant hook F. The distance between the protrusion 730 and the hanging wall 91 at this time (the distance in the direction of movement of the operation plate 7) corresponds to the stroke (movement stroke of the operation plate 7) required for the operation plate 7, which is in the first position, to move to the second position. FIG. 31 shows the wind-resistant hook F in an activated state, with the operation plate 7 in the second position. When the operation plate 7 is in the second position, the protrusion 730 protruding from the rear surface 73 of the operation plate 7 abuts against the lower portion of the hanging wall 91 of the cover plate 9 (case) of the movable wind-resistant hook F. When the operation plate 7 slides from the first position to the second position, the protrusion 730 of the operation plate 7 abuts against the hanging wall 91 of the cover plate 9, maintaining the second position. When the operation plate 7 slides from the first position to the second position, the fitting protrusion 140 of the lock spring 14 fits into the fitting receptacle 79 formed on one side edge 700 of the face portion 70 of the operation plate 7, maintaining the operation plate 7 in the second position and locking the operation state of the wind-resistant hook F. When the wind-resistant hook F is activated, a finger is hooked on the raised piece (finger hook) 74 of the operation plate 7 to slide the operation plate 7 from the first position to the second position. However, if the operation plate 7 in the second position is pushed in with more force, the fitting protrusion 140 of the lock spring 14 may deform, causing the lock spring 14 to come off the second side wall 82 of the bottom plate 8, and the locked state may no longer be maintained. In the wind-resistant hook F equipped with a stopper as shown in Figures 30 and 31, when the operation plate 7 slides from the first position to the second position, the protrusion 730 of the operation plate 7 abuts against the hanging wall 91 to maintain the second position, and even if a strong force acts to push the operation plate 7 further, the operation plate 7 in the second position is prevented from being pushed further, thereby preventing the lock spring 14 inside the case from coming off and making it impossible to maintain the locked state.

[0101] [E] Movable wind-resistant shutter This embodiment of the shutter is equipped with wind-resistant hooks. As shown in FIGS. 1 and 2, movable wind-resistant hooks F are provided at both longitudinal ends of a plurality of slats (four in this embodiment) 10 located in the middle of the shutter curtain 1 in the height direction when the shutter curtain 1 is in the fully closed position. The movable wind-resistant hooks F have movable claws 4 and require switching between an inoperative state (claws 4 in the retracted position) and an operative state (claws 4 in the locked position). When the shutter curtain 1 is opened or closed, or when the opening is normally fully closed, the claws 4 are in the retracted position. When the opening is fully closed, the claws 4 are in the protruding position, thereby functioning as wind-resistant hooks. Inside the guide rail 3, hook receivers 16 are provided at heights corresponding to the height positions of the wind-resistant hooks F of the shutter curtain 1 when the opening is in the fully closed position.

[0102] [E-1] Visually check the storage and operation status of wind-resistant hooks 19 is a front view and a side view of the longitudinal end of a slat 10 to which a wind-resistant hook F is attached, viewed from the back side. The wind-resistant hook F is attached to a recessed portion on the back side of the slat 10, with the bottom surface 80 of the bottom plate 8 facing the slat 10 and the top surface 90 of the cover plate 9 facing the back side (indoor side). The wind-resistant hook F is attached to the slat 10 with the leading edge 800 of the bottom surface 80 of the bottom plate 8 aligned with the longitudinal end edge 103 of the slat 10. In this embodiment, the wind-resistant hook F is attached to the slat 10 via a mounting plate 15.

[0103] When the shutter curtain 1 is in the fully closed position, the tip portion of the wind-resistant hook F is located inside the guide rail 3. That is, the wind-resistant hook F is made up of a first portion (inner portion) located inside the guide rail 3 and a second portion (outer portion) located outside the guide rail 3, and the first portion (inner portion) includes the claw portion 4 and the opening 94 formed in the upper surface portion 90 of the cover plate 9, while the second portion (outer portion) includes the opening 95 formed in the upper surface portion 90 of the cover plate 9, the warning sign located between the openings 94 and 95 and provided on the upper surface portion 90 of the cover plate 9, the rear surface portion 73 of the operation plate 7, and the raised piece (finger hook) 74.

[0104] The upper diagram shows the wind-resistant hook F in an inoperative state, with the claw 4 in the retracted position and the operation plate 7 in the first position. The first display G provided on the surface 70 of the operation plate 7 is located in an opening 95 formed in the upper surface 90 of the cover plate 9 and is exposed through the opening 95. The claw 4 is positioned so as not to protrude from the longitudinal edge 103 of the slat 10. The rising piece 44 at the base end portion of the claw 4 is close to the first edge 940 of the opening 94 in the upper surface 90 of the cover plate 9. The protruding piece 83 at the tip of the bottom surface 80 protrudes from the longitudinal edge 103 of the slat.

[0105] The lower diagram shows the activated state of the wind-resistant hook F, with the claw 4 in the locked position and the operation plate 7 in the second position. The second display R provided on the surface 70 of the operation plate 7 is located in and exposed from an opening 95 formed in the upper surface 90 of the cover plate 9. The locking piece 42 at the tip of the claw 4 protrudes from the longitudinal edge 103 of the slat 10. The rising piece 44 at the base end of the claw 4 abuts against a second edge 941 of the opening 94 in the upper surface 90 of the cover plate 9. The protruding piece 83 at the tip of the bottom surface 80 is in approximately the same position as the claw 4 protruding from the longitudinal edge 103 of the slat (the corner between the locking piece 42 and the front part 40).

[0106] A caution is displayed on the upper surface 90 of the cover plate 9 of the wind-resistant hook F, located between the openings 94 and 95. The caution states that the shutter is locked (activated) when the second display part R is exposed from the opening 95, and that the shutter is unlocked (inactivated) when the first display part G is exposed from the opening 95, and states, "Do not open or close the shutter when the second display part R is exposed from the opening 95."

[0107] The wind-resistant hook F has a first part (inner part) located inside the guide rail 3 and a second part (outer part) located outside the guide rail 3, and the second part (outer part) has the first display part G to the second display part R located in the opening 95 and exposed from the opening 95, as well as a warning display, so that when the opening is fully closed and the operator tries to raise the shutter curtain 1, the operator can visually determine whether the first display part G or the second display part R is exposed.

[0108] In this embodiment, the shutter curtain 1 is provided with multiple wind-resistant hooks F, which are provided at both longitudinal ends of multiple slats (four in this embodiment) 10 located in the middle of the height direction of the opening blocking portion 1' of the shutter curtain 1 when it is in the fully closed position.All of the wind-resistant hooks F are located within a limited, fixed height range compared to the opening height, and since multiple wind-resistant hooks F are included in the same field of view, visual inspection of the condition of the wind-resistant hooks F can be easily performed.

[0109] [E-2] Wind-resistant hook storage and operation Figure 21 is a cross-sectional view of the widthwise end of the shutter device in a fully closed state, showing the state in which the lengthwise end of the slat 10 to which the wind-resistant hook F is attached is received within the guide rail, and the wind-resistant hook F has a first part (inner part) located within the guide rail and a second part (outer part) located outside the guide rail.

[0110] In Figure 21(A), the wind-resistant hook F is in an inoperative state, and the claw portion 4 is in a stored position. The claw portion 4 is located within the thickness of the slat 10, and the hook receiver 16 has a projected dimension such that it does not protrude from the guide groove 35 into the slat end receiving space toward the bottom wall 32 of the guide rail 3, so that the slat 10 and the wind-resistant hook F do not interfere with the hook receiver 16 and hinder the shutter opening and closing operation when the shutter curtain 1 is raised and lowered. In Figure 21(A), the operation plate 7 is in the first position, and by sliding the operation plate 7 from the first position to the second position, it becomes in the operative state shown in Figure 21(B), where the second fitting receiver 79 of the operation plate 7 and the fitting protrusion 140 of the lock spring 14 are fitted together, locking the operative state.

[0111] 21(B), the wind-resistant hook F is in an activated state, and the claw portion 4 is in a locked position. The front portion 40 of the claw portion 4 extends obliquely in a plan view from the longitudinal edge 103 of the slat 10 toward the bottom wall 32 and the first side wall 30, and the locking piece 42 formed in a folded shape at the tip of the front portion 40 is close to or in contact with the inner surface of the first side 160 of the hook receiver 16. The locking piece 42 is positioned rearward of the inner surface of the second side 161 of the hook receiver 16 and spaced apart.

[0112] Figure 22 is a cross-sectional view of the widthwise end of the shutter device in the fully closed state, showing the state in which the longitudinal end of the slat 10 to which the wind-resistant hook F is attached is received within the guide rail, and also showing the state in which the slat 10 is biased toward the bottom side of the guide rail 3.

[0113] In Figure 22(A), the wind-resistant hook F is in an inoperative state, and the claw portion 4 is in the stored position. The claw portion 4 is located within the thickness of the slat 10, and the hook receiver 16 has a projected dimension such that it does not protrude from the guide groove 35 into the slat end receiving space toward the bottom wall 32 of the guide rail 3, so that when the shutter curtain 1 is raised or lowered, the slat 10 or the wind-resistant hook F does not interfere with the hook receiver 16 and hinder the shutter opening and closing operation. The protruding piece 83 at the tip of the bottom portion 80 of the bottom plate 8 of the wind-resistant hook F abuts against the inner surface of the bottom wall 32 of the guide rail 3, and the claw portion 4 in the stored position and the inner surface of the bottom wall 32 of the guide rail 3 are spaced a predetermined distance apart, ensuring space for the claw portion 4 to protrude.

[0114] In Figure 22(A), the operation plate 7 is in the first position, and when the operation plate 7 is slid from the first position to the second position from the state in Figure 22(A), the claw portion 4 attempts to slide in conjunction with the movement of the operation plate 7 in the first direction, but when the claw portion 4 protrudes a predetermined distance, the end portion of the claw portion 4 (the corner formed by the front portion 40 and the locking piece 42) abuts against the inner surface of the bottom wall 32 of the guide rail 3, and as the operation plate 7 continues to slide in the first direction, the claw portion 4 moves relative to the operation plate 7 so as to be pushed into the inside of the case (when the operation plate 7 moves in the first direction, the intermediate plate 5 does not move and the first coil spring 12 extends), and when the operation plate 7 moves to the second position, the second mating receiving portion 79 of the operation plate 7 and the mating protrusion 140 of the lock spring 14 are mated, and the operating state is locked.

[0115] In Figure 22(B), the wind-resistant hook F is in the operating state (the second fitting receiving portion 79 of the operation plate 7 and the fitting protrusion 140 of the lock spring 14 are in a fitting state), but the claw portion 4 is in the stored position. The claw portion 4 is biased in the direction of rotation to the locking position. The internal state of the wind-resistant hook F is similar to that in Figure 16.

[0116] In the state shown in Figure 22(B), when the offset of the slat 10 is eliminated, the protrusion 83 at the tip of the intermediate plate 5 moves away from the inner surface of the bottom wall 32 of the guide rail 3, and the claw 4 rotates to the locked position, resulting in the state shown in Figure 22(C). The state shown in Figure 22(C) is the same as the state shown in Figure 21(B), in which the front portion 40 of the claw 4 extends obliquely in plan view from the longitudinal edge 103 of the slat 10 toward the bottom wall 32 and the first side wall 30, and the locking piece 42 formed in a folded-back shape at the tip of the front portion 40 is close to or in contact with the inner surface of the first edge 160 of the hook receiver 16. The locking piece 42 is positioned rearward of the inner surface of the second edge 161 of the hook receiver 16 and away from it. Furthermore, in the state shown in Figure 22(C), when the slat 10 shifts to the bottom wall 32 side of the guide rail 3, the claw portion 4 in the engagement position hits the bottom wall 32 and is pushed toward the case, but when the claw portion 4 is pushed in slightly, the protrusion 83 abuts against the bottom wall 32 of the guide rail 3, thereby restricting the pushing of the claw portion 4, and the claw portion 4 is not pushed further toward the case, which would release the locked state of the second position of the operating plate 7.

[0117] 21(B) and 22(C), the shutter curtain 1 is in the state shown in FIG. 21(B) and the state shown in FIG. 22(C). The upper figure shows the case where the wind pressure acting on the shutter curtain 1 is positive, and the shutter curtain 1 bulges toward the indoor side, causing the longitudinal ends of the slats 10 to assume an inclined position in plan view, and the claws 4 to engage with the corners of the first side 160 and the second side 161. The surface side portion of the slat 10 abuts against the front portion 33 of the first side wall 30 of the guide rail 3. The lower figure shows the case where the wind pressure acting on the shutter curtain 1 is negative, causing the shutter curtain 1 to bulge toward the outdoor side, causing the longitudinal ends of the slats 10 to assume an inclined position in plan view, and the claws 4 to engage with the corners of the first side 160 and the second side 161. The rear side portion of the slat 10 abuts against the front portion 34 of the second side wall 31 of the guide rail 3. Since the claw portion 4 in this embodiment is rotatable, the claw portion 4 can be engaged with the engaged portion (hook receiver 16) at an appropriate rotation angle depending on the position of the wind-resistant hook F relative to the engaged portion. This is one of the advantages over conventional fixed wind-resistant hooks. In fact, in the embodiment shown in the lower figure, the claw portion 4 is more reliably engaged with the engaged portion when rotated relative to the embodiment shown in the upper figure (close to the position shown in Figure 16).

[0118] [E-3] Curtain opening control means As described above, this embodiment is provided with a means for visually confirming whether the wind-resistant hooks F are activated or deactivated when the opening is fully closed. By displaying the state of the wind-resistant hooks F, the shutter curtain 1 is prevented from being opened when the wind-resistant hooks F are activated (when the first display G is displayed). However, it is possible that the shutter curtain 1 may be opened while overlooking the fact that one or more wind-resistant hooks F are activated (the claws 4 are in the locked position). In this case, the claws 4 may hit the underside 232 of the upper guide 23 at the top end of the guide rail 3 with force, potentially damaging the claws 4 or the upper guide 23. Even if the design of the upper guide 23 were modified, the claws 4 in the locked position may interfere with the shutter curtain 1 when it is wound onto the winding body 2, causing irregular winding or generating abnormal noise.

[0119] The hook receiver 16 according to this embodiment has an L-shape in plan view or cross section, formed by a first edge 160 extending in the forward direction of the guide rail 3 and a second edge 161 extending in the forward direction of the guide rail 3. The first edge 160 and the second edge 161 form a latching portion on which the claw portion 4 in the latching position can be latched. The hook receiver 16 is fixed at a height corresponding to the height of each wind-resistant hook F when the opening is fully closed. In this embodiment, one hook receiver 16 is provided corresponding to each wind-resistant hook F, and as shown in FIG. 1 , four hook receivers 16 are provided on each side. The hook receiver 16 is an elongated member having a predetermined height, which in this embodiment is higher than the height of the slat 10. Alternatively, one hook receiver 16 may correspond to multiple wind-resistant hooks spaced apart in the vertical direction.

[0120] An upper surface 162 is formed at the upper end of each hook receiver 16. When the wind-resistant hook F is in an inoperative state (the claw portion 4 is in the stored position), the upper surface 162 does not interfere with the raising and lowering of the shutter curtain 1, but when the wind-resistant hook F is in an operative state, it is positioned above the claw portion 4 in the locked position and forms an abutment portion against which the claw portion 4 can abut. When the shutter curtain 1 is raised while the wind-resistant hook F is in an operative state, the claw portion 4 in the locked position abuts against the upper surface 162 from below, restricting the rise of the shutter curtain 1.

[0121] Therefore, if one or more wind-resistant hooks F are in an activated state (claw portions 4 are in the locked position) and an attempt is made to raise the shutter curtain 1 by mistake, the claw portions 4 in the locked position will rise and come into contact with the upper surface 162, restricting further upward movement of the shutter curtain 1. With regard to the accuracy of the mounting position of the hook receiver 16 corresponding to the height of the wind-resistant hook F of the shutter curtain 1 when the opening is fully closed, it is sufficient that the engaged portions (first side 160 and second side 161) of the hook receiver 16 correspond to the height of the claw portions 4 of the wind-resistant hook F, and furthermore, the height position of the abutted portions (upper surface 162) is allowed to be spaced above the claw portions 4 of the wind-resistant hook F in the locked position, so there is no need to mount the hook receiver 16 in a precise position relative to the guide rail 3, improving the efficiency of the mounting work. In this embodiment, the abutment portion (upper surface 162) is located above and spaced apart from the claw portion 4 in the locked position, and after the shutter curtain 1 has risen slightly (when there is a gap between the floor surface F and the seat plate 11), it may restrict further rise. In the case of an electric shutter, the rise of the shutter curtain can be stopped by detecting the load. Alternatively, a sensor may be provided to detect the claw portion 4 in the locked position, thereby detecting the operating state of the wind-resistant hook F.

[0122] [E-4] Wind-resistant shutter structure As shown in Figures 2 and 24, the shutter curtain 1 is configured vertically in a height direction and is divided into four sections 1A-1D from bottom to top, each of which includes a plurality of slats. When the opening is fully closed, the shutter curtain 1 comprises an opening blocking section 1' corresponding to the overall height of the building opening and an upper section 1D located above the building opening. The opening blocking section 1' comprises an upper section 1C located below the upper section 1D, a lower section 1A having a base panel 11 at its lower end, and an intermediate section 1B between the upper section 1C and the lower section 1A. At least one slat 10 of the upper section 1D of the shutter curtain 1 faces an inner lintel 21 and an outer lintel 22 extending in the width direction of the building opening above the building opening, and both widthwise ends of the opening blocking section 1' are located inside the guide rail 3.

[0123] A wind-resistant hook F is provided at both longitudinal ends of one or more of the slats 10 in the middle region 1B. The wind-resistant hooks F are provided on the rear surface of the shutter curtain 1 when the opening is fully closed. In this embodiment, wind-resistant hooks F are provided at both longitudinal ends of four slats 10. The number of wind-resistant hooks F is not limited to the illustrated embodiment, and for example, two to six wind-resistant hooks F are provided at each of both widthwise ends of the shutter curtain 1. In one embodiment, wind-resistant hooks F are provided at both widthwise ends of the 15th, 18th, 22nd, and 25th slats 10 from the bottom. That is, a plurality of wind-resistant hooks F are provided every three or four slats. The middle region 1B is formed by the 14th to 26th slats from the bottom. In the opening blocking portion 1' of the shutter curtain 1, no wind-resistant hooks are provided on the slats 10 located above and below the middle portion 1B, and multiple wind-resistant hooks F are concentrated in the middle portion 1B of the opening blocking portion 1'.

[0124] The lower portion 1A is made up of a plurality of slats 10 including a base plate 11, and in a manual shutter, a locking device 19 is provided on the slats 10 in the lower portion 1A. In one embodiment, the lower portion 1A is made up of the thirteenth slat 10 from the bottom of the base plate, and the locking device 19 is provided on the thirteenth slat 10 from the bottom. When the locking device 19 is provided at a predetermined height on the shutter curtain 1 when the opening is fully closed, all of the wind-resistant hooks F are provided above the locking devices 19.

[0125] Let H1 be the height dimension of the lower region 1A of the opening blocking region 1' of the shutter curtain 1, H2 be the height dimension of the middle region 1B, and H3 be the height dimension of the upper region 1C, and H1 ≥ H2 is satisfied. In one embodiment, the height dimension H1 of the lower region 1A remains constant even when the opening height changes. The height dimension H2 of the middle region 1B satisfies H2 ≤ H1, and as the opening height increases, the height dimension H3 of the upper region 1C increases. By keeping the position of the lowest slat 10 to which the wind-resistant hooks F are attached constant from the bottom edge of the opening regardless of the opening height at the site, the installation workability of the wind-resistant hooks F and hook receivers 16 is improved. Furthermore, because all of the wind-resistant hooks F are located in the middle region 1B of the opening blocking region 1', the workability of switching the wind-resistant hooks F between the inoperative state and the operative state is improved.

[0126] The shutter curtain 1 is prepared in sections at the factory, packed in sections, and transported to the construction site for assembly. In this embodiment, the slats 10 immediately above the base plate 11 through the slats 10 immediately below the slat 10 equipped with the locking device 19 are designated as the first set S1, the multiple slats 10 substantially corresponding to the middle section 1B are designated as the second set S2, and the slats 10 substantially corresponding to the upper section 1C and upper section 1D are designated as the third set. One or more packaging sets are prepared for each of the first set S1, second set S2, and third set S3. All slats 10 equipped with wind-resistant hooks F are included in the second set S2. The base plate 11 and the slats 10 equipped with the locking device 19 are prepared separately from the packaging sets. These packaging configurations are merely examples; for example, the first set S1 and the second set S2 may be packaged together.

[0127] A hook receiver 16 is provided inside the guide rail 3 at a height corresponding to the height position of the wind-resistant hook of the shutter curtain 1 when the opening is in the fully closed position. When the wind-resistant hook F is in the inoperative state, the claw portion 4 of the wind-resistant hook F is in the stored position and is separated from the hook receiver 16, so that it does not affect the raising and lowering operation of the shutter curtain 1.

[0128] When the opening is fully closed, the operating plate 7 is slid from the first position to the second position as necessary to change the wind-resistant hook F from its inactive state to its active state, and the claws 4 are placed in the locked position. The installation method for the wind-resistant structure according to this embodiment includes the steps of lowering the shutter curtain 1 with the wind-resistant hooks F in its inactive state to fully close the building opening, and sliding the operating plate 7 of the wind-resistant hook F in the first direction to place the wind-resistant hook F in its active state, where the claws 4 of the wind-resistant hook F are in the locked position and can be locked into the hook receivers 16 in the guide rail 3. When the opening is fully closed, setting the wind-resistant hooks F in the active state allows the multiple wind-resistant hooks in the heightwise intermediate portion to lock into the hook receivers 16, thereby resisting the surface pressure when it acts on the shutter curtain 1.

[0129] When the opening is fully closed, the shutter curtain 1 in a vertical position consists of a lower section 1A, a middle section 1B, an upper section 1C, and an upper section 1D, and the lower section 1A has a base plate 11 which is more rigid than the slats 10, and wind-resistant hooks F are provided at both widthwise ends of the multiple slats 10 in the middle section 1B, and one or more slats 10 located at the upper end of the upper section 1C and / or one or more slats 10 located at the lower end of the upper section 1D face the inner lintel 21 and the outer lintel 22.

[0130] When wind pressure of a predetermined magnitude or greater acts on the shutter curtain 1 when the opening is fully closed, multiple wind-resistant hooks F at both widthwise ends of the intermediate portion 1B of the opening blocking portion 1' engage with hook receivers 16 in the left and right guide rails 3 to resist the wind pressure (Figures 23 and 25).

[0131] At the lower end portion of the opening when it is fully closed, both widthwise ends of the seat panel 11 at the lower end of the lower portion 1A of the opening closing portion 1' abut against the guide rail 3 from the inside to resist wind pressure (Fig. 26). The seat panel 11 has greater mechanical strength than the slats 10 and is less likely to deform than the slats 10, and both lengthwise ends abut against the front portions 33 and 34 of the guide rail 3, thereby preventing it from slipping off the guide rail 3.

[0132] At the upper end of the opening when it is fully closed, one or more slats 10 located at the lower end of the upper section 1D and / or one or more slats 10 located at the upper end of the upper section 1C come into contact with the inner lintel 21 at their widthwise central portions to withstand wind pressure (Fig. 27). In this embodiment, the strength of the outer lintel 22 is less than that of the inner lintel 21, but the structural body W is located adjacent to the outer lintel 22, and when surface pressure acts in a direction that causes the shutter curtain 1 to expand indoors, one or more slats 10 located at the lower end of the upper section 1D and / or one or more slats 10 located at the upper end of the upper section 1C come into contact with the structural body W to withstand wind pressure.

[0133] In this embodiment, when wind pressure of a predetermined magnitude or greater acts on the shutter curtain 1 when the opening is fully closed, the wind-resistant hooks F provided at both widthwise ends of the middle portion 1B of the opening blocking portion 1' lock into hook receivers (locked portions) 16 in the guide rails 3, the widthwise central portions of the slats 10 located at the upper ends of the opening blocking portion 1' abut against the structure (lintels 21, 22 and the main body), and both widthwise ends of the seat board 11 abut against the guide rails 3 from the inside, thereby facing the wind pressure. As the opening height and opening width increase, the surface pressure acting on the opening blocking portion 1' also increases, but by gradually increasing the strength of the seat board 11 and / or the lintels 21, 22 as the opening height and opening width increase, it is possible to withstand the surface pressure without increasing the number of wind-resistant hooks F.

[0134] [Appendix 1] A shutter curtain made up of multiple slats connected in the height direction; Left and right guide rails located at both widthwise ends of the building opening and extending to the entire height of the building opening; Wind-resistant hooks are provided at both ends of the length direction of some of the slats of the shutter curtain; Equipped with The wind-resistant hook is a movable wind-resistant hook having a claw portion that is movable between a locking position and a storage position, A locking portion is provided in the guide rail at a height corresponding to the height position of the wind-resistant hook. shutter.

[0135] In one embodiment, an abutment portion is provided in the guide rail and positioned above the locked portion, When the claw portion is in the locking position, the abutted portion is located above the claw portion. In one embodiment, the contacted portion is integrally formed with the locked portion. In one embodiment, a hook receiver having the locked portion and the abutted portion is provided inside the guide rail. In one embodiment, when the opening is fully closed, the claw portion in the locking position locks onto the locked portion, thereby providing a wind-resistant structure that prevents the slat end from slipping out of the guide rail. A method for installing a wind-resistant structure using shutters, comprising: We provide shutter curtains with wind-resistant hooks at both ends of the slats. The guide rails located at both ends of the building opening in the width direction are provided with latching portions corresponding to the height positions of the wind-resistant hooks, The wind-resistant hook is a movable wind-resistant hook that can be in an operating state where the claw portion is in an engaging position and in an inoperable state where the claw portion is in a stored position, The wind-resistant hook is deactivated, and the shutter curtain closes the building opening. When the opening is in a fully closed state, the wind-resistant hook is changed from a non-operated state to an activated state, and the claw portion is brought into an engaging position so that the claw portion can be engaged with the engaged portion. How to install a wind-resistant structure using shutters.

[0136] [Appendix 2] A shutter curtain made up of multiple slats connected in the height direction and equipped with a seat plate at the bottom end; Left and right guide rails located at both widthwise ends of the building opening and extending to the entire height of the building opening; In a shutter equipped with The shutter curtain comprises an opening closing portion corresponding to the entire height of the building opening when the opening is fully closed, and an upper portion located above the building opening, At least one slat in the upper portion and / or at least one slat at the upper end portion of the opening closing portion faces a structure extending in the width direction of the building opening above the building opening, Both widthwise ends of the opening closing portion are located within the guide rail, One or more slats located at the height center of the opening blocking portion are provided with wind-resistant hooks at both ends in the length direction, A locking portion is provided in the guide rail at a height corresponding to the height position of the wind-resistant hook, When a wind pressure of a predetermined magnitude or greater acts on the shutter curtain with the opening fully closed, the central portion of the width direction of the at least one slat abuts against the structure, both ends of the width direction of the seat plate abut against the guide rails from the inside, and the one or more wind-resistant hooks are engaged with the engaged portion. Wind-resistant shutter structure.

[0137] In one embodiment, the opening blocking portion comprises an upper portion consisting of a plurality of slats, a lower portion consisting of a plurality of slats and a lower end seat plate, and an intermediate portion between the upper portion and the lower portion, The intermediate portion is made up of a plurality of slats, and one or more of the plurality of slats are provided with wind-resistant hooks at both ends in the longitudinal direction. In one embodiment, the height dimension of the lower section is equal to or greater than the height dimension of the intermediate section. In one embodiment, the plurality of wind-resistant hooks are provided for every third or every third slat. In one embodiment, the plurality of wind-resistant hooks are provided at two to six positions on each of both widthwise ends of the shutter curtain. In one embodiment, the structure is a lintel. In one embodiment, the structure is a wall or a building frame. In one embodiment, the wind-resistant hook is a movable wind-resistant hook having a claw portion that is movable between a locking position and a storage position. In one embodiment, a locking device is provided, and the wind-resistant hook is provided on the upper side of the locking device. A method for installing a wind-resistant structure using shutters, comprising: We provide shutter curtains with wind-resistant hooks at both ends of the slats. The shutter curtain comprises an opening closing portion corresponding to the entire height of the building opening when the opening is fully closed, and an upper portion located above the building opening, The opening closing portion comprises an upper portion, a lower portion provided with a seat plate, and an intermediate portion between the upper portion and the lower portion, and one or more slats in the intermediate portion are provided with wind-resistant hooks at both ends in the longitudinal direction thereof; The guide rails located at both ends of the building opening in the width direction are provided with latching portions corresponding to the height positions of the wind-resistant hooks, The wind-resistant hook is a movable wind-resistant hook that can be in an operating state where the claw portion is in an engaging position and in an inoperable state where the claw portion is in a stored position, The wind-resistant hook is deactivated, and the shutter curtain closes the building opening. When the opening is fully closed, both ends of the seat plate in the longitudinal direction are positioned within the guide rails, and the lower end of the upper portion and / or the upper end of the upper portion face a structure positioned above the building opening, When the opening is in a fully closed state, the wind-resistant hook is changed from a non-operated state to an activated state, and the claw portion is brought into an engaging position so that the claw portion can be engaged with the engaged portion. How to install a wind-resistant structure using shutters.

[0138] [Appendix 3] an operating unit that is slidable between a first position and a second position; a claw portion movable between a locking position and a storage position; Equipped with When the operation unit is in the first position, the claw unit is in a stored position, In conjunction with the operation portion moving from the first position to the second position, the claw portion changes from a storage position to a locking position. A wind-resistant hook, When the claw is in the storage position, the wind-resistant hook is in an inoperative state, and when the claw is in the locking position, the wind-resistant hook is in an operative state; A locking means is provided to maintain the wind-resistant hook in an operating state. Movable wind-resistant hook.

[0139] In one embodiment, the locking means is a holding means for holding the operating portion in the second position. In one embodiment, the wind-resistant hook includes a case, and the case has a portion facing a side edge of the operating portion, a fitting protrusion is provided on one of the side edge of the operating portion and the portion of the case, and a fitting receiving portion is provided on the other; When the operation portion is in the second position, the fitting protrusion is in a fitted state with the fitting receiving portion, The mated state can be released by sliding the operating portion with a predetermined force. In one embodiment, when the fitting protrusion and the fitting receiving portion are in a fitted state (the windproof hook is in an activated state), the claw portion in the locking position is biased by a spring material in a direction to maintain the locking position, When the wind-resistant hook is in an activated state, the force acting to move the claw portion, which is in the locked position, to the stored position is absorbed by the spring material, thereby maintaining the mating state between the mating protrusion and the mating receiving portion. In one embodiment, an intermediate member is connected to the operation unit via a spring member and slides in conjunction with the sliding movement of the operation unit, The claw portion is movable between a storage position and a locking position in conjunction with the sliding movement of the intermediate member, When the wind-resistant hook is in an activated state, the force acting to move the claw portion, which is in the locked position, to the stored position is absorbed by the spring material, thereby maintaining the mating state between the mating protrusion and the mating receiving portion.

[0140] In one embodiment, the locking means for maintaining the operating state of the wind-resistant hook is a first locking means, Furthermore, a second locking means is provided to keep the wind-resistant hook in an inoperative state. In one embodiment, the second locking means is a retaining means for retaining the operating portion in the first position. In one embodiment, the wind-resistant hook includes a case, and the case has a portion facing a side edge of the operating portion, a fitting protrusion is provided on one of the side edge of the operating portion and the portion of the case, and a first fitting receiving portion and a second fitting receiving portion are provided on the other; When the operation portion is in a first position, the fitting protrusion is in a fitted state with the first fitting receiving portion, When the operation portion is in the second position, the fitting protrusion is in a fitted state with the second fitting receiving portion, The mated state can be released by sliding the operating portion with a predetermined force. Equipped with the above-mentioned movable wind-resistant hook, The guide rails located at both ends of the building opening in the width direction are provided with latching portions corresponding to the height positions of the wind-resistant hooks, A shutter with a wind-resistant structure that prevents the slat ends from slipping out of the guide rails when the opening is fully closed by engaging the claw portions in an engaging position with the engaged portions.

[0141] [Appendix 4] an operating unit that is slidable between a first position and a second position; a claw portion movable between a locking position and a storage position; Equipped with When the operation unit is in the first position, the claw unit is in a stored position, In conjunction with the operation portion moving from the first position to the second position, the claw portion changes from a storage position to a locking position. A wind-resistant hook, When the claw portion is in the storage position, the wind-resistant hook is in an inoperative state, and when the claw portion is in the locking position, the wind-resistant hook is in an operative state. Equipped with a visual confirmation means that can distinguish the operating state or non-operating state of the wind-resistant hook. Movable wind-resistant hook.

[0142] In one embodiment, the wind-resistant hook comprises a case, the operating unit or an element that slides in conjunction with the sliding movement of the operating unit includes a portion that faces the inner surface of the face portion of the case, In the part, a first indicator showing a non-operated state and a second indicator showing an operated state are arranged side by side in the sliding direction, A visual inspection opening is formed on the surface of the case, When the operating unit is in the first position, the first display unit is positioned in the visual confirmation opening and exposed, and when the operating unit is in the second position, the second display unit is positioned in the visual confirmation opening and exposed. In one embodiment, the first display portion and the second display portion are distinguished by color. In one embodiment, the first display portion and the second display portion are identified by letters and / or symbols. In one embodiment, the wind-resistant hook has a portion located within the guide rail and a portion located outside the guide rail, and the visual inspection opening is formed in the portion located outside the guide rail. In one embodiment, the wind-resistant hooks are attached to the rear surface of the shutter curtain, so that the state of the wind-resistant hooks can be visually observed from inside the house. In one aspect, multiple wind-resistant hooks are provided at both ends of the length of the slats in a limited area in the height direction, midway up the height direction of the opening occluding portion of the shutter curtain when the opening is fully closed, making visual inspection easier than when wind-resistant hooks are provided across the entire height. Equipped with the above-mentioned movable wind-resistant hook, A locking portion is provided in the guide rail at a height corresponding to the height position of the wind-resistant hook, A shutter with a wind-resistant structure that prevents the slat ends from slipping out of the guide rails when the opening is fully closed by engaging the claw portions in an engaging position with the engaged portions.

[0143] [Appendix 5] The wind-resistant hooks provided at the longitudinal ends of the slats have claws that are movable between a storage position and a locking position, The locking portion at the tip of the claw in the locking position can be locked to the locked portion provided inside the guide rail, When the claw portion is in the storage position, the claw portion is in a first position where the locking portion is positioned at the same level as or inside the slat edge, When the claw portion is in the locking position, the claw portion is in a second position in which the locking portion protrudes outward from the slat edge, The slats are provided at their longitudinal ends with protrusions that protrude beyond the slat edges, When the claw portion is in the first position, the tip of the convex portion is located closer to the bottom of the guide rail than the locking portion. Movable wind-resistant hook.

[0144] In one aspect, when the slat is biased toward the bottom of the guide rail, the claw portion in the storage position is kept spaced apart from the bottom of the guide rail, ensuring space for the claw portion to protrude. In one embodiment, the wind-resistant hook has a case, and the protrusion is part of the case. In one embodiment, when the claw portion is in the second position, at least a portion of the engaging portion is positioned approximately at the same position as the tip of the convex portion or closer to the bottom of the guide rail than the tip of the convex portion. In one embodiment, the tip of the convex portion is curved. In one embodiment, an operating unit that is slidable between a first position and a second position; a claw portion movable between a locking position and a storage position; Equipped with In conjunction with the operation portion moving from the first position to the second position, the claw portion changes from a storage position to a locking position, When the operation unit moves to the second position, the second position is maintained, When the slat is biased toward the bottom of the guide rail, the convex portion abuts against the bottom of the guide rail, thereby securing a space for the claw portion to protrude toward the bottom, thereby allowing the operation unit to move to the second position, When the operation unit moves to the second position with the claw portion in contact with the bottom portion, the claw portion is biased in a direction to assume a locking posture, When the offset is eliminated and the protrusion is separated from the bottom, the claw portion is brought into the locking position by the biasing force.

[0145] [Appendix 6] an operating unit that is slidable between a first position and a second position; an intermediate member connected to the operation unit via a first spring member and sliding in conjunction with the sliding movement of the operation unit; a pressing member that is connected to the intermediate member via a second spring member and slides in conjunction with the sliding movement of the intermediate member; a claw portion that is movable between a storage position and a locking position in conjunction with the sliding movement of the operation portion; Equipped with a base end portion of the claw portion is loosely fitted into a tip end portion of the intermediate member, and the claw portion moves from a storage position to a locking position in conjunction with the sliding movement of the operation portion from the first position to the second position, The tip of the compression member abuts against a base end portion of the claw portion and presses the base end portion toward the tip side. Movable wind-resistant hook.

[0146] In one embodiment, when the operating unit is in the first position, the biasing force of the first spring material is equal to or greater than the biasing force of the second spring material (the biasing force is the same as or greater than the biasing force of the second spring material), and when the operating unit slides from the first position to the second position, the operating unit, the intermediate member, and the compression member slide integrally toward the tip side. In one embodiment, the base end portion of the claw portion includes a first portion (a hanging piece 43), a second portion (a rising piece 44), and a third portion (a base end portion 41′ of the rear portion), a first portion and / or a third portion of a base end portion of the claw portion is engaged with a tip end portion of the intermediate member, and the claw portion moves from a storage position to a locking position in conjunction with the sliding movement of the operation unit from the first position to the second position, The tip of the pressing member abuts against a second portion of the base end side portion of the claw portion and presses the second portion toward the tip side. In one embodiment, the tip side portion of the intermediate member includes a first raised piece on a side closer to the tip and a second raised piece on a side farther from the tip, and a recessed groove is formed by the first raised piece and the second raised piece, a first portion of a base end portion of the claw portion is received in the recessed groove with play; When the operating portion is in the first position, the first portion and / or the third portion of the base end side portion of the claw portion is engaged with the first rising piece. In one embodiment, when the operation unit is in the first position, a base end portion of the claw portion is in an inclined position in which a second portion is located closer to a tip end than the first portion, When the operating portion is in the second position, the base end portion of the claw portion has a first portion and a second portion that are in a vertical position along the second rising piece, and the third portion is in a horizontal position.

[0147] In one embodiment, when the operation unit is in the first position, an abutment portion is provided at a distance from the tip end side of the second portion of the base end side of the claw portion, When the operating portion moves from the first position to the second position, the operating portion, the intermediate member, and the pressing member slide integrally toward the tip end side until the second portion abuts against the abutted portion, and the claw portion slides toward the tip end side, With the second portion in contact with the abutted portion, the operating portion and the intermediate member slide toward the tip while stretching the second spring material, causing the first portion and / or third portion of the claw portion to be pressed against the tip side portion (first raised piece and / or second raised piece), causing the claw portion to rotate around the abutted portion as a fulcrum and assume a locking position. In one embodiment, the device comprises a case, An opening is formed on the front end side of the face portion of the case, and the opening has a first edge portion on the side farther from the front end and a second edge portion on the side closer to the front end, a second portion of the base end portion of the claw portion is located within the opening, When the operating portion is in the first position, the second portion of the base end portion is located on the first edge portion side, and the second edge portion serves as the abutted portion. In one embodiment, the surface of the operating part faces the rear portion of the surface of the intermediate part, a first spring material is positioned in the space between the surface of the operating part and the rear portion of the surface of the intermediate part, and an opening or groove that receives a portion of the first spring material is formed in one or both of the surface of the operating part and the rear portion of the surface of the intermediate part. In one embodiment, the surface of the compression member faces the front portion of the surface of the intermediate member, a second spring material is positioned in the space between the surface of the compression member and the front portion of the surface of the intermediate member, and an opening or groove is formed in one or both of the surface of the compression member and the front portion of the surface of the intermediate member to receive a portion of the second spring material.

[0148] [Appendix 7] an operating unit that is slidable between a first position and a second position; a claw portion movable between a locking position and a storage position; a claw actuation mechanism that moves the claw from a storage position to a locking position in conjunction with movement of the operation unit from the first position to the second position; Equipped with The claw actuation mechanism includes a first actuation mechanism that slides the claw in the storage position toward the tip end, and a second actuation mechanism that rotates the claw that has slid toward the tip end to place it in the locking position. Movable wind-resistant hook.

[0149] In one embodiment, a base end portion of the claw portion is loosely fitted into a tip end portion of the operation portion, When the operation portion is in the first position, an abutment portion is provided on the tip side of the base end portion of the claw portion at a distance therefrom, When the operation unit moves from the first position to the second position, the first actuation mechanism operates until the base end portion abuts the abutted portion, and the tip end portion slides toward the tip end, whereby the claw portion is pushed by the tip end portion and slides toward the tip end, The second operating mechanism is activated after the base end portion comes into contact with the abutted portion when the operating part moves from the first position to the second position, and when the base end portion comes into contact with the abutted portion, the tip end portion slides toward the tip side, causing the base end portion of the claw portion to be pressed by the tip end portion, and the claw portion rotates around the abutted portion as a fulcrum to assume a locking position. In one embodiment, the tip side portion includes a first raised piece on a side closer to the tip and a second raised piece on a side farther from the tip, and a recessed groove is formed by the first raised piece and the second raised piece, The base end portion of the claw portion includes a first portion, a second portion, and a third portion, a first portion of a base end portion of the claw portion is received in the recessed groove with play; When the operating portion is in the first position, a first portion and / or a third portion of a base end portion of the claw portion is engaged with the first rising piece, When the operation portion is in the first position, the abutment portion is provided at a distance from a tip end side of a second portion of a base end side portion of the claw portion, the first actuation mechanism causes the second portion to slide until it abuts against the abutted portion; The second operating mechanism is activated after the second portion comes into contact with the abutted portion, and when the tip portion slides toward the tip while the second portion is in contact with the abutted portion, the first portion and / or the third portion of the claw portion is pressed by the tip portion (first raised piece and / or second raised piece), causing the claw portion to rotate around the abutted portion as a fulcrum and assume a locking position. In one embodiment, the device comprises a case, An opening is formed on the front end side of the face portion of the case, and the opening has a first edge portion on the side farther from the front end and a second edge portion on the side closer to the front end, a second portion of the base end portion of the claw portion is located within the opening, When the operating portion is in the first position, the second portion of the base end portion is located on the first edge portion side, and the second edge portion serves as the abutted portion. In one aspect, when the operation unit is in the first position, a base end portion of the claw portion is in an inclined position in which the second portion is located closer to the tip end than the first portion, When the first actuation mechanism is actuated, the claw portion slides toward the distal end side while maintaining the inclined posture of the proximal end portion, When the second actuation mechanism is actuated, the base end side portion of the claw portion, which is in the inclined position, assumes a vertical position in which the first portion and the second portion are aligned with the second rising piece. In one embodiment, an intermediate member is provided that slides in conjunction with the sliding movement of the operation unit, The tip side portion is the tip side portion of the intermediate member. In one embodiment, a pressing member is provided that slides in conjunction with the sliding movement of the intermediate member, The tip of the compression member abuts against a second portion of the base end side region of the claw portion. In one aspect, an intermediate member is connected to the operation unit via a first spring member and slides in conjunction with the sliding movement of the operation unit; a pressing member that is connected to the intermediate member via a second spring member and slides in conjunction with the sliding movement of the intermediate member; When the first operating mechanism is initially actuated, the biasing force of the first spring material is equal to or greater than the biasing force of the second spring material (the biasing force is the same as or greater than the biasing force of the second spring material), and when the first operating mechanism is actuated, the operation portion, the intermediate member, and the compression member slide integrally toward the tip side, When the second actuation mechanism is actuated, the operating portion and the intermediate member slide integrally toward the tip end side, and the second spring material expands, thereby increasing the biasing force of the second spring. [Explanation of symbols]

[0150] 1. Shutter Curtain 1´ Orifice occlusion site 1A lower part 1B Intermediate part 1C upper part 1D upper part 10 slats 103 Longitudinal edge of slat (slat edge) 11 Seat board 21 Inner lintel 22 Exterior lintel 3 Guide rails 31 First side wall 32 Second side wall 32 Bottom wall (bottom) 4 Claws 40 Front part 41 Posterior part 41´ Proximal portion of the rear portion (proximal portion of the nail, third portion) 42 Locking piece (locking part) 43 Hanging piece (proximal part of the claw, first part) 44 Rising piece (base end part of claw, second part) 5 Intermediate plate (intermediate member) 50 sides 51 Wide part (tip side part) 52 Rising piece (first rising piece, tip side part) 53 Rising piece (second rising piece, tip side part) 58 Concave groove (tip side part) 6 Compression plate (compression member) 60 area 61 Contact part 7 Operation panel (operation section) 70 area 78 First fitting receiving portion (second locking means, holding means) 79 Second fitting receiving portion (first locking means, holding means) 730 Protrusion (stopper) 8 Bottom plate (case) 83 Projection (protrusion) 9 Cover plate (case) 90 Top part 91 Hanging wall (immovable part) 94 Aperture 940 First edge 941 Second edge (abutted part) 95 Opening (visual inspection opening, visual inspection means) 12 First coil spring (first spring material) 13 Second coil spring (second spring material) 14 Lock spring (locking means, holding means) 15 Mounting plate 16 Hook holder 160 First side (engaged portion) 161 Second side (engaged portion) 162 Top surface (abutted part) F. Windproof hook W frame G 1st display section R 2nd display

Claims

1. an operating unit that is slidable between a first position and a second position; a claw portion movable between a locking position and a storage position; Equipped with When the operation unit is in the first position, the claw unit is in a stored position, In conjunction with the movement of the operation portion from the first position to the second position, the claw portion rotates from the storage position to the locking position. A wind-resistant hook, When the claw portion is in the storage position, the wind-resistant hook is in an inoperative state, and when the claw portion is in the locking position, the wind-resistant hook is in an operative state. The wind-resistant hook is provided with a locking means for maintaining its operating state. When the wind-resistant hook is in an activated state, the claw portion in the locked position is biased by the spring material in a direction to maintain the locked position, so that the claw portion can rotate while maintaining the locked position, and the force acting to move the claw portion in the locked position to the stored position is absorbed by the spring material, so that the locking means maintains the activated state of the wind-resistant hook. Movable wind-resistant hook.

2. The locking means is a holding means for holding the operating unit in the second position; The movable wind-resistant hook according to claim 1.

3. The wind-resistant hook includes a case, and the case has a portion facing a side edge of the operating portion, a fitting protrusion is provided on one of the side edge of the operating portion and the portion of the case, and a fitting receiving portion is provided on the other; When the operating portion is in the second position, the fitting protrusion is in a fitted state with the fitting receiving portion, The fitted state can be released by sliding the operation unit with a predetermined force. A movable wind-resistant hook according to any one of claims 1 and 2.

4. When the fitting protrusion and the fitting receiving portion are in a fitted state, the claw portion in the locking position is biased by a spring material in a direction to maintain the locking position, When the wind-resistant hook is in an activated state, the force acting to move the claw portion from the locking position to the storage position is absorbed by the spring material, thereby maintaining the mating state between the mating protrusion and the mating receiving portion. The movable wind-resistant hook according to claim 3.

5. an intermediate member connected to the operation unit via a spring member and sliding in conjunction with the sliding movement of the operation unit; The claw portion is movable between a storage position and a locking position in conjunction with the sliding movement of the intermediate member, When the wind-resistant hook is in an activated state, the force acting to move the claw portion from the locking position to the storage position is absorbed by the spring material, thereby maintaining the mating state between the mating protrusion and the mating receiving portion. The movable wind-resistant hook according to any one of claims 3 and 4.

6. The locking means for maintaining the operating state of the wind-resistant hook is a first locking means, Further, a second locking means is provided to keep the wind-resistant hook in an inoperative state. A movable wind-resistant hook according to any one of claims 1 to 5.

7. The second locking means is a holding means for holding the operating unit in a state where it is in the first position; The movable wind-resistant hook according to claim 6.

8. The wind-resistant hook includes a case, and the case has a portion facing a side edge of the operating portion, a fitting protrusion is provided on one of the side edge of the operation portion and the portion of the case, and a first fitting receiving portion and a second fitting receiving portion are provided on the other; When the operating portion is in a first position, the fitting protrusion is in a fitted state with the first fitting receiving portion, When the operation portion is in the second position, the fitting protrusion is in a fitted state with the second fitting receiving portion, The fitted state can be released by sliding the operation unit with a predetermined force. The movable wind-resistant hook according to any one of claims 6 and 7.

9. The operating part is provided with a stopper that abuts on a fixed part of the wind-resistant hook when the operating part moves to the second position. A movable wind-resistant hook according to any one of claims 1 to 8.

10. The stationary part is a case of a wind-resistant hook. The movable wind-resistant hook according to claim 9.

11. A movable wind-resistant hook according to any one of claims 1 to 10, The guide rails located at both ends of the building opening in the width direction are provided with latching portions corresponding to the height positions of the wind-resistant hooks, A shutter with a wind-resistant structure that prevents the slat ends from slipping out of the guide rails when the opening is fully closed by engaging the claw portions in an engaging position with the engaged portions.

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