Shutter Device

Abstract

To provide a shutter device capable of preventing a slat from coming off from a guide rail when a flying object collides with it.SOLUTION: A shutter device 10 includes: a shutter curtain 3 consists of multiple slats 2 extending in the horizontal direction connected in the vertical direction; and a guide rail 4 supporting the shutter curtain 3 in the lateral direction end. The multiple slats 2 includes a reinforcement slat 24 that has an engaging member 6 that protrudes from the end of the slat body 21 and engages the guide rail 4. The engaging member 6 has a metal skeleton member 66 and a resin cover 68 that covers the skeleton member 66, the metal skeleton member having a first extension portion 61 extending outward from the end of the slat body 21 and a second extension portion 62 extending from the first extension portion 61 to the outdoor side.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a shutter device. [Background technology]

[0002] Patent Document 1 discloses a shutter curtain having a slat curtain formed by connecting a large number of slats formed in the shape of rectangular plates. This shutter curtain comprises a slat curtain with multiple connected slats, a main body piece portion fixed to the ends of the slats, and a guide rail that guides the slat curtain up and down. The main body piece portion has a metal plate portion and a resin portion that covers a part of it and is molded integrally with it. The resin portion has a retaining portion that protrudes from the end of the slat and has a bulging tip, and the retaining portion functions as a wind-resistant hook. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-040437 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 discloses a technology that uses a wind-resistant hook made of resin, but does not disclose a technology that can handle the large impact that occurs when a flying object hits the shutter. There is a concern that the wind-resistant hook made of resin described in Patent Document 1 may not be durable enough to withstand the impact of a flying object.

[0005] One object of the present disclosure is to provide a shutter device in which the slats are less likely to come off the guide rails when struck by a flying object. [Means for solving the problem]

[0006] To solve the above problems, a shutter device according to one aspect of the present disclosure includes a shutter curtain formed by connecting multiple slats extending laterally in the vertical direction, and a guide rail supporting the horizontal ends of the shutter curtain. The multiple slats include reinforcing slats having an engaging member that protrudes from the end of the front slat body and engages with the guide rail. The engaging member includes a metal frame member having a first extension portion that extends outward from the end of the slat body and a second extension portion that extends from the first extension portion to the outdoors, and a resin cover that covers the frame member. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a front view showing the shutter device according to the embodiment. [Figure 2] 2 is a cross-sectional view showing a horizontal section of a reinforcing slat of the shutter device of FIG. 1. FIG. [Figure 3] 3 is an enlarged cross-sectional view of an engagement portion of the reinforcing slat of FIG. 2. FIG. [Figure 4] 4 is a diagram showing an example of a framework member of the engagement portion of FIG. 3. FIG. [Figure 5] FIG. 10 is a view showing a skeleton member having a plurality of second extension portions. [Figure 6] FIG. 10 is a diagram showing a frame member having a plurality of indoor extensions. [Figure 7] 10 is a view showing a skeleton member having a rib between a first extending portion and a second extending portion. FIG. [Figure 8] FIG. 10 is a rear view showing a reinforcing slat of the shutter device of the first modified example. [Figure 9] FIG. 10 is a rear view showing another example of a reinforcing slat. [Figure 10] FIG. 10 is a plan view showing a reinforcing slat of a shutter device according to a second modified example. [Figure 11] FIG. 11 is a rear view of the reinforcing slat of FIG. 10. DETAILED DESCRIPTION OF THE INVENTION

[0008] The inventors of the present application have studied shutters and have come to the following new realization: High-speed flying objects caused by strong winds such as those from a typhoon can collide with a shutter installed at an opening in a building, shattering the glass in the sash on the interior side of the shutter. In this case, serious damage can occur, such as glass being scattered into the room or strong winds entering the room and blowing off the roof.

[0009] Such glass breakage occurs when the end of a shutter slat comes off the guide rail due to the impact of a flying object hitting it (hereinafter referred to as "slat detachment"), and the slat hits the glass together with the flying object. Therefore, glass breakage can be reduced by preventing slat detachment when a flying object hits it. Below, a technique for preventing slat detachment will be described with reference to an embodiment.

[0010] An example of an embodiment will be described below. Identical components will be assigned the same reference numerals, and redundant explanations will be omitted. In each drawing, some components will be omitted, enlarged, or reduced as appropriate for ease of explanation. The drawings should be viewed according to the orientation of the reference numerals. The structures and shapes referred to in this specification include not only structures and shapes that strictly match the contents referred to, but also structures and shapes that deviate by errors such as dimensional errors and manufacturing errors. In each drawing, some components that are not important for explaining the embodiment will be omitted.

[0011] Terms including ordinal numbers such as "first" and "second" are used to describe various components. These terms are used only to distinguish one component from another, and do not limit the configuration of the present disclosure. The following embodiments are provided as examples to help understand the contents of the present disclosure, and do not limit the configuration of the present disclosure.

[0012] [Embodiment] Please refer to Figures 1 to 6. An embodiment of the present disclosure is a shutter device 10. The shutter device 10 is suitably installed to open and close openings such as windows and entrances in buildings. In the embodiment, as shown in Figure 1, the shutter device 10 is installed so as to cover the outdoor side of a rectangular window 98 installed in an opening 94 in a wall surface 92. In the embodiment, the shutter device 10 mainly comprises a shutter curtain 3 and a guide rail 4. Figure 1 shows a state in which the shutter curtain 3 is fully closed. As an example, as shown in Figure 2, the window 98 has a screen door 81 and a glass shoji screen 85.

[0013] Hereinafter, for convenience, the opening and closing direction of the shutter curtain 3 will be referred to as the "vertical direction," the direction along the width of the shutter curtain 3 will be referred to as the "horizontal direction," and the direction perpendicular to the vertical and horizontal directions will be referred to as the "front-to-rear direction." In the front-to-rear direction, the side on which the shutter device 10 is placed with respect to the window 98 will be referred to as the "outdoor side," and the opposite side will be referred to as the "indoor side." In this example, the horizontal and front-to-rear directions are horizontal directions, and the vertical direction is the direction along the top and bottom. These directional notations do not limit the orientation of the shutter device 10, and the shutter device 10 can be used in any orientation. The horizontal dimension will sometimes be referred to as the "horizontal width," the vertical dimension as the "vertical width," and the front-to-rear dimension as the "front-to-rear width." In the horizontal direction, the direction from the end of the shutter curtain 3 to the center will be referred to as the "inward" or "inside," and the opposite will be referred to as the "outward" or "outside."

[0014] The shutter curtain 3 is formed by connecting a plurality of slats 2 extending in the horizontal direction in the vertical direction. As shown in FIG. 1, the plurality of slats 2 include normal slats 22 and reinforcing slats 24 (shown with hatching), which will be described later. Guide rails 4 support the horizontal ends of the shutter curtain 3. In this example, two guide rails 4 are provided, spaced apart in the horizontal direction so as to support both ends of the shutter curtain 3. The two guide rails 4 are fixed to a wall surface 92 with an opening 94 between them.

[0015] From the viewpoint of reducing damage caused by flying objects, it is desirable that the slats 2 do not come off the guide rail 4 when a flying object hits the shutter curtain 3. Therefore, in this embodiment, the multiple slats 2 include reinforcing slats 24 having engagement members 6 that protrude from the end of the slat body 21 and engage with the guide rail 4. As shown in FIG. 3, the engagement members 6 have a metal skeleton member 66 and a resin cover 68 that covers the skeleton member 66. The skeleton member 66 has a first extension portion 61 that extends outward from the end of the slat body 21, and a second extension portion 62 that extends from the first extension portion 61 to the outdoors. In FIG. 3, the first extension portion 61 and the second extension portion 62 are indicated by solid hatching.

[0016] A slat 2 that does not have an engaging member 6 is referred to as a slat 22. As shown in FIG. 1, of the plurality of slats 2 that make up the shutter curtain 3, some are reinforcing slats 24 and the rest are slats 22.

[0017] As an example, the frame member 66 can be integrally formed by pressing an iron-based metal plate such as a cold-rolled steel plate (JIS name SPC). The resin cover 68 can be formed by resin molding from a plastic material such as engineering plastic. Examples of such plastic materials include PBT, POM, and PA. The resin cover 68 can be molded into multiple pieces, and each piece can be attached to the frame member 66. As shown in FIG. 3 , the resin cover 68 includes a first cover portion 681 that mainly covers the first extension portion 61, and a second cover portion 682 that mainly covers the second extension portion 62 and the indoor extension portion 64.

[0018] As an example, the base end of the first extension portion 61 is fixed to the indoor side of the slat body 21 by welding or the like. As shown in FIG. 3, the first extension portion 61 extends outward from the end of the slat body 21. In this example, the first extension portion 61 extends diagonally horizontally from the base end to partway toward the indoor side, and then extends horizontally from that point. The second extension portion 62 extends in the front-to-rear direction from the tip of the first extension portion 61 toward the outdoor side. The bending angle between the first extension portion 61 and the second extension portion 62 is set to 90°.

[0019] When a flying object strikes the center of a slat 2 in an indoor direction, the slat 2 may vibrate, repeatedly displacing the center toward the indoor direction and then displacing the center toward the outdoor direction as a reaction to the impact. When the center of the slat 2 is displaced toward the outdoor direction, the slat may become dislodged. Therefore, as shown in Figure 3, the framework member 66 of this embodiment further has an indoor-side extension 64 that extends from the first extension 61 toward the indoor side. In Figure 3, the indoor-side extension 64 is indicated by dashed hatching.

[0020] 3, the base end of the indoor side extending portion 64 extends indoors in the front-to-rear direction from the tip of the first extending portion 61. The bending angle between the first extending portion 61 and the indoor side extending portion 64 is set to 90°, and the second extending portion 62 and the indoor side extending portion 64 extend in opposite directions.

[0021] As shown in Figure 3, the guide rail 4 of this embodiment has an outdoor-side main surface portion 42, a side main surface portion 41, an indoor-side main surface portion 43, a connecting portion 44, a first extending portion 45, and a second extending portion 46. The outdoor-side main surface portion 42 extends horizontally and vertically on the outdoor side. The side main surface portion 41 bends from an end of the outdoor-side main surface portion 42 toward the indoor side and extends in the front-rear direction and vertically. The indoor-side main surface portion 43 extends parallel to the outdoor-side main surface portion 42, away from the outdoor-side main surface portion 42 toward the indoor side.

[0022] The connecting portion 44 bends from the end of the indoor-side main surface portion 43 toward the outdoor side and extends in the front-to-rear and vertical directions to connect to the outdoor-side main surface portion 42. The connecting portion 44 is located outside the engaging member 6 via a gap. The first extending portion 45 and the second extending portion 46 are located apart in the front-to-rear direction to sandwich the first extending portion 61 via a gap, and extend in the front-to-rear and vertical directions. The distance between the first extending portion 45 and the second extending portion 46 is smaller than the front-to-rear width of the second extending portion 62. When the reinforcing slat 24 receives an impact, the first extending portion 45 limits the range of movement of the second extending portion 62, preventing the slat from coming off. When the reinforcing slat 24 receives an impact, the second extending portion 46 limits the range of movement of the indoor-side extending portion 64, preventing the slat from coming off.

[0023] 4 to 6, circle E shows the skeletal member 66 as viewed from the arrow F. As shown in FIG. 1, the skeletal member 66 may have a single second extending portion 62. In the embodiment, in order to make it more difficult for the skeletal member 66 to come off, the skeletal member 66 has multiple second extending portions 62. In the example of FIG. 5, the skeletal member 66 has two second extending portions 62 that are arranged vertically apart with an indoor side extending portion 64 in between. The two second extending portions 62 and the indoor side extending portion 64 are arranged in a staggered pattern in side view.

[0024] To make it more difficult for the frame member 66 to come off, the frame member 66 may have multiple indoor-side extending portions 64. Fig. 6 shows a frame member 66 having two indoor-side extending portions 64 that are spaced apart in the vertical direction with a second extending portion 62 sandwiched between them.

[0025] When impacted by a flying object, the tip of the second extension portion 62 may vibrate and come off the guide rail 4. Therefore, as shown in FIG. 7 , the framework member 66 may have a third extension portion 63 extending inward from the second extension portion 62. The third extension portion 63 extends inward in the horizontal direction from the tip of the second extension portion 62. The bending angle between the second extension portion 62 and the third extension portion 63 is set to 90°. The extension amount of the third extension portion 63 can be set to be greater than the thickness of the third extension portion 63. In this case, the guide rail 4 may be provided with a third extension portion 47 that limits the movement range of the third extension portion 63 when impacted by a flying object. In the example shown in FIG. 7 , the third extension portion 47 extends outward in the horizontal direction from the tip of the first extension portion 45 and extends in both the horizontal and vertical directions.

[0026] When impacted by a flying object, the second extending portion 62 engages with the guide rail 4, restricting its position, and a force is applied to the first extending portion 61 and the second extending portion 62 in a direction that widens the bending angle. If the bending angle between the first extending portion 61 and the second extending portion 62 widens, the slats are more likely to come off. Therefore, as shown in FIG. 7, the frame member 66 may have reinforcing ribs 65 between the first extending portion 61 and the second extending portion 62. The shape and number of the ribs 65 can be determined by calculation or simulation depending on the desired strength. The presence of the ribs 65 allows the frame member 66 to be made thinner, which is advantageous for reducing the weight of the shutter curtain 3.

[0027] In the shutter curtain 3, some of the multiple slats 2 may be composed of reinforcing slats 24. When a flying object hits the vertical center portion, the slats 2 may be prone to coming off the guide rail 4, so it is desirable to reinforce the center portion. Therefore, in the embodiment, as shown in Fig. 1, when the shutter curtain 3 is closed, if the vertical dimension of the exposed portion of the shutter curtain 3 that is exposed to the outdoors is taken as 100%, at least one reinforcing slat 24 is arranged within a range of 30% to 70% from the vertical end of the exposed portion. In the example of Fig. 1, three reinforcing slats 24 are arranged within the range of 30% to 70%.

[0028] The features of the shutter device 10 configured as above will be described. The shutter device 10 comprises a shutter curtain 3 formed by connecting a plurality of slats 2 extending laterally in the vertical direction, and a guide rail 4 that supports the horizontal ends of the shutter curtain 3. The plurality of slats 2 include reinforcing slats 24 that have an engaging member 6 that protrudes from the end of the slat body 21 and engages with the guide rail 4. The engaging member 6 has a metal frame member 66 that has a first extending portion 61 that extends outward from the end of the slat body 21 and a second extending portion 62 that extends from the first extending portion 61 to the outdoors side, and a resin cover 68 that covers the frame member 66.

[0029] With this configuration, the second extension portion 62 extending outdoors engages with the guide rail 4, reducing the likelihood of the slat coming off due to impact from flying objects. The metal frame member 66 is less likely to deform or break even when subjected to a strong impact. The resin cover 68 reduces friction between the engagement member 6 and the guide rail 4 when the shutter curtain 3 is raised or lowered, suppressing wear on the guide rail 4.

[0030] In this embodiment, the framework member 66 further has an indoor-side extending portion 64 extending indoors from the first extending portion 61. In this case, when an outward force is applied to the shutter device 10, the slat 2 is less likely to come off the guardrail.

[0031] In the embodiment, the second extending portions 62 and the indoor side extending portions 64 are arranged in a staggered pattern in a side view and are integrally formed. In this case, the second extending portions 62 and the indoor side extending portions 64 can be easily integrated, simplifying the structure.

[0032] The framework member 66 may have a third extending portion 63 extending inward from the second extending portion 62. In this case, by having the third extending portion 63, it is possible to reduce the possibility that the tip of the second extending portion 62 will come off the guide rail 4 even if it vibrates.

[0033] A rib 65 may be provided between the first extending portion 61 and the second extending portion 62. In this case, the strength between the first extending portion 61 and the second extending portion 62 can be increased. Since the first extending portion 61 and the second extending portion 62 can be made thinner while maintaining the same strength, this is advantageous for reducing the weight of the shutter curtain 3.

[0034] In the embodiment, when the shutter curtain 3 is closed, and the vertical dimension of the portion of the shutter curtain 3 exposed to the outdoors is taken as 100%, at least one reinforcing slat 24 is arranged within a range of 30% to 70% from the vertical end of the exposed portion among the multiple slats 2. In this case, the slat 2 in the vertical center is less likely to come off the guardrail, so the entire shutter curtain 3 can be supported.

[0035] The following describes modified examples. In the drawings and descriptions of the modified examples, the same or equivalent components and members as those in the embodiment are denoted by the same reference numerals. Explanations that overlap with the embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the embodiment.

[0036] [First Modification] A shutter device 10 of a first modified example will be described with reference to Figures 8 and 9. This modified example differs from the embodiment in that it includes a connecting member 72, but the other configurations are similar. Therefore, redundant explanations will be omitted and the explanation will focus on the connecting member 72.

[0037] When impacted by a flying object, the impact may cause the fastening portion between the engaging member 6 and the slat body 21 to separate, resulting in the engaging member 6 becoming detached from the slat body 21. While it is possible to increase the strength of the fastening portion, this would increase the number of manufacturing steps, which would be disadvantageous in terms of cost. Therefore, as shown in Figure 8, the reinforcing slat 24 of this modified example has a connecting member 72 for connecting the two engaging members 6 provided on both ends of the slat body 21 to each other. The connecting member 72 in the example of Figure 8 is a horizontally long, strip-shaped member. The connecting member 72 is composed of a single member.

[0038] The connecting member 72 may be formed integrally with the skeletal member 66 of one of the two engaging members 6. As shown in Fig. 9, the connecting member 72 may be formed integrally with the skeletal members 66 of both of the two engaging members 6. Although Figs. 8 and 9 show examples of engaging members without resin covers, the engaging members may be fitted with resin covers.

[0039] The first modified example provides the same functions and effects as the embodiment. In addition, the first modified example makes it difficult for the fixed portion to come off because the two skeletal members 66 are linked together. This is advantageous in terms of the number of steps required to manufacture the fixed portion between the engaging member 6 and the slat body 21.

[0040] [Second Modification] A shutter device 10 of a second modified example will be described with reference to Figures 10 and 11. This modified example differs from the embodiment in that it is provided with a guide 28 and the engaging member 6 (skeleton member 66) is movable laterally, but the other configurations are the same. Therefore, redundant explanations will be omitted and the explanation will focus on the configuration of the differences.

[0041] The smaller the gap between the engaging member 6 and the guide rail 4 (first extension portion 45), the less likely the slat will come off when hit by a flying object. However, if this gap is too small, the chances of them coming into contact with each other increase, increasing frictional resistance during lifting and lowering, and increasing wear on the components. Therefore, as shown in Figures 10 and 11, the reinforcing slat 24 may have a guide 28 that supports the engaging member 6 so that it can slide laterally.

[0042] In disaster prevention mode, when there is a possibility of flying objects, the engaging members 6 can be slid inward to reduce the gap with the guide rail 4, thereby reducing the possibility of the slat coming off. In Figures 10 and 11, the state in which the engaging members 6 are slid inward in disaster prevention mode is shown by dashed lines. At this time, the engaging members 6 may be fixed to the slat body 21 by a fastener (not shown) such as a bolt. Note that the engaging members 6 may also be configured to come into contact with the guide rail 4 in disaster prevention mode.

[0043] In normal mode, when there is little possibility of flying objects, the engaging members 6 can be slid outward to widen the gap with the guide rails 4. In Figures 10 and 11, the state in which the engaging members 6 are slid outward in normal mode is shown by solid lines.

[0044] The framework member 66 has a sliding portion 67 extending inward from the inward end of the first extending portion 61, and a bending portion 69 bending from the inward end of the sliding portion 67 toward the interior of the room. There are no limitations on the configuration of the guide 28, but in the example of FIGS. 10 and 11 , the guide 28 includes a pair of rails 282 that are spaced apart in the vertical direction and extend in the horizontal direction. The sliding portion 67 has a band shape that extends in the horizontal direction, and both vertical ends of the sliding portion 67 are slidably supported in grooves provided in the pair of rails 282. The bending portion 69 functions as a finger hook, and the framework member 66 can be slid by pushing or pulling the bending portion 69 in the horizontal direction.

[0045] The two skeletal members 66 at both ends of the reinforcing slat 24 may be extended laterally so as to overlap each other, thereby increasing the strength of the reinforcing slat 24. Although Figures 10 and 11 show examples of engaging members without resin covers, the engaging members may be fitted with resin covers.

[0046] According to the second modified example, the same actions and effects as those of the embodiment can be achieved. In addition, according to the second modified example, the gap between the framework member 66 and the guide rail 4 can be changed between the disaster prevention mode and the normal mode.

[0047] [Other variations] In the description of the embodiment, an example has been shown in which some of the plurality of slats 2 are configured as reinforcing slats 24, but the present invention is not limited to this. All of the plurality of slats may be configured as reinforcing slats.

[0048] In the description of the embodiment, an example has been shown in which the resin cover 68 is molded in multiple pieces, and each piece is attached to the skeletal member 66, but the present invention is not limited to this. The resin cover may be attached to the skeletal member by insert molding, or by painting such as electrostatic powder painting.

[0049] In the description of the embodiment, an example has been shown in which the resin cover 68 covers the entire first extending portion 61 and the second extending portion 62, but this is not limiting. The resin cover may cover only a portion of the first extending portion and the second extending portion.

[0050] Any combination of the above components is also valid as an aspect of the technical idea that abstracts the embodiment and the modified examples. For example, any description of another embodiment may be combined with the embodiment, or any description of an embodiment and another modified example may be combined with the modified example.

[0051] The above describes the embodiments and modifications. When understanding the abstract technical concepts of the embodiments and modifications, the technical concepts should not be interpreted as being limited to the contents of the embodiments and modifications. The above-described embodiments and modifications are merely illustrative examples, and many design modifications, such as changes, additions, and deletions of components, are possible. In the embodiments, the content in which such design modifications are possible is emphasized by adding the notation "embodiment." However, design modifications are also permitted even in content without such notation. Hatching on cross sections in the drawings does not limit the material of the hatched object. [Explanation of symbols]

[0052] 2 Slat, 3 Shutter curtain, 4 Guide rail, 6 Engagement member, 21 Slat body, 24 Reinforcing slat, 28 Guide, 61 First extension portion, 62 Second extension portion, 63 Third extension portion, 64 Indoor extension portion, 65 Rib, 66 Skeleton member, 67 Slide portion, 68 Resin cover, 72 Connecting member, 10 Shutter device.

Claims

1. A shutter curtain is provided which is formed by connecting a plurality of slats extending in the horizontal direction in the vertical direction, and a guide rail which supports the horizontal end portion of the shutter curtain, The plurality of slats include reinforcing slats having engagement members that protrude from ends of the slat bodies and engage with the guide rails; The engaging member includes a metal frame member having a first extension portion extending outward from an end of the slat body and a second extension portion extending from the first extension portion to the exterior side, and a resin cover covering the frame member; The reinforcing slat has a guide that supports the engaging member so that the engaging member is slidable in the lateral direction, The guide includes a pair of rails spaced apart in the longitudinal direction and extending in the transverse direction; The skeletal member has a slide portion extending inward from the inward end of the first extension portion, and a finger hook portion bent toward the inside of the room from the inward end of the slide portion.

2. The shutter device according to claim 1 , wherein the framework member further includes an indoor-side extension portion that extends from the first extension portion toward the indoor side.

3. The shutter device according to claim 2 , wherein the second extension portion and the indoor extension portion are arranged in a staggered pattern in a side view and are integrally formed.

4. The shutter device according to claim 1 , wherein the skeletal member has a third extending portion extending inward from the second extending portion.

5. The shutter device according to claim 1 , wherein a rib is provided between the first extension portion and the second extension portion.

6. A shutter device described in any one of claims 1 to 5, wherein when the shutter curtain is closed and the vertical dimension of the part of the shutter curtain exposed to the outdoors is 100%, at least one of the reinforcing slats is positioned within a range of 30% to 70% from the vertical end of the exposed part of the shutter curtain among the plurality of slats.

Images