Sheet-type shutter device

Abstract

In a shutter device 1 equipped with a sheet-type shutter curtain 3, the front sealing material 12, one of the sealing materials 12 and 13 provided before and after the intake opening 10 of the shutter curtain 3, is made easily visible from below for inspection. [Solution] The front sealing material 12 is provided on the rear upright surface portion 7ce of the case bottom plate 7c, and positioned lower than the swallowing opening 10. This makes it easier to see from below compared to when it is provided at the swallowing opening 10, thereby improving maintainability.

Description

Technical Field

[0001] The present invention relates to the technical field of a sheet-type shutter device for opening and closing an opening of a building such as a building, a house, a garage, etc.

Background Art

[0002] Generally, a shutter device for a building may be provided to open and close an opening such as an entrance of a building such as a building, a house, a garage, etc. Such a shutter device includes guide rails provided on the left and right of the opening, a shutter curtain that is guided to open and close by the guide rails to open and close the opening, a winding body (winding drum, winding wheel) disposed in the upper space (ceiling part) of the opening where the shutter curtain is wound, and is attached to the side member of the housing above the opening, and is configured using various member devices such as left and right brackets that support the left and right edge portions of the winding body. And among such shutter devices, there are those in which the shutter curtain is made of a sheet type instead of a slat type made of metal. And in such a sheet-type shutter device, since the shutter curtain is lighter than that of the slat type, a configuration is adopted in which the left and right brackets supporting the winding body are attached to the upper edge portions of the left and right guide rails instead of the housing side, thereby attempting to simplify the on-site installation of the shutter device. However, some sheet-type shutter devices may be provided at an entrance with a wide left and right opening width. In such a case, when simply attaching brackets to the left and right guide rails and attaching a general-purpose shutter case with a flat upper surface, front surface, and lower surface to the brackets, it is predicted that the shutter case will have insufficient strength and the central portion in the left and right directions will sag downward and deform. Therefore, as a measure to address this, it is known that the lower part of the shutter case is made of a curved material that bulges downward below the opening for the shutter curtain, and the upright part of the lower part of the case that faces the guide rail is connected to the guide rail via a connecting means to increase the strength of the shutter case (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2016-44510 [Overview of the project] [Problems that the invention aims to solve]

[0004] Incidentally, even in sheet-type shutter devices, a certain degree of airtightness (sealing) is required. Therefore, conventional devices had a pair of sealing materials (airtight material, sealing material, airtight sheet) attached to the front and back of the intake area, with their tips interfering with the curtain surface of the shutter curtain from both the front and back sides. However, since such sealing materials are generally made of synthetic resin, they inevitably deteriorate and wear down due to friction, and this wear condition was checked by the manager by visually inspecting it from below. However, in the shutter device described above, which has a case bottom surface that bulges downward and has an upright piece, one of the sealing materials that interferes with the sheet surface from the winding body side is positioned at the insertion opening, which is the upper bottom of the narrow groove formed by the curtain surface of the shutter curtain and the upright piece. However, this upper bottom of the groove is on the ceiling side and is difficult for the light from the interior lamp to reach, making it difficult to check the wear status by visual inspection from below, which impairs maintainability and presents problems that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention was created in view of the above circumstances and with the aim of solving these problems, and the invention of claim 1 comprises: guide rails supported on the building structure side in a state where they are arranged on the left and right sides of the opening; left and right brackets attached to the guide rails with their base ends resting on the upper ends of the guide rails; a winding body whose left and right end edges are supported by extensions that extend to one side in the front-rear direction of the left and right brackets; a sheet-type shutter curtain wound around the winding body and guided by the guide rails to open and close the opening; and a shutter case attached to the left and right brackets in a state where it covers the winding body, and which swallows the shutter curtain. A sheet-type shutter device is provided in which a feeding opening is provided at the lower part of the base end of the shutter case, wherein the shutter case is provided with a case bottom portion that bulges downward below the feeding opening, and the case bottom portion has an upright surface portion that faces the guide rail in the front and rear directions and is connected to the guide rail via a connecting means, and a pair of sealing materials are provided on the front and rear of the feeding opening, the tip portions of which interfere with the front and rear curtain surfaces of the shutter curtain, wherein one of the pair of sealing materials that interferes with the curtain surface from the winding body side is attached to the upright surface portion below the feeding opening. The invention of claim 2 is a sheet-type shutter device according to claim 1, characterized in that a guide roller for guiding the shutter curtain is provided on the upper side of the winding body side portion of the intake opening, and the lower portion to which one of the sealing materials is attached is such that when one of the sealing materials bends upward due to the upward movement of the shutter curtain, the tip of the sealing material does not reach the guide roller. The invention of claim 3 is a sheet-type shutter device according to claim 1 or 2, characterized in that the shutter curtain is set such that when the shutter curtain is fully open, the bottom portion of the lowest end is located below the intake opening, and the lower portion to which one of the sealing materials is attached is such that when the shutter curtain is fully open, the tip portion interferes with the curtain surface above the bottom portion. [Effects of the Invention]

[0006] The invention of claim 1 provides a shutter device in which the shutter curtain is of the sheet type, in which the lower part of the shutter case is made into a curved structure that bulges below the intake opening into which the shutter curtain is taken in, and the strength of the shutter case is increased by connecting the upright part provided on the lower part of the case to the guide rail. In this device, of the pair of sealing materials provided at the front and rear to interfere with the curtain surface of the shutter curtain, one of the sealing materials on the winding body side is attached to a lower part below the intake opening, and as a result, the deterioration state of the sealing material is easier to check from below compared to when it is attached to a higher part of the intake opening, thus improving maintainability. By adopting the invention of claim 2, one of the sealing materials arranged on the winding body side is installed lower than the intake opening and further away from the guide roller also arranged on the winding body side. As a result, it is possible to avoid the sealing material, which elastically deforms upward during the opening process of the shutter curtain, getting caught between the shutter curtain and the guide roller, thereby ensuring that the opening operation of the shutter curtain is performed smoothly. By adopting the invention of claim 3, when the shutter curtain is fully open, the tip of one of the sealing materials will interfere with the curtain surface above the bottom portion. As a result, when the shutter curtain is fully open, the sealing material will not be subjected to significant bending and deformation by contacting the thick bottom portion, thereby improving the durability of the sealing material and extending its lifespan. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view of a sheet-type shutter device. [Figure 2] This is a side cross-sectional view of a sheet-type shutter device in its fully closed state. [Figure 3] This is a side cross-sectional view of a sheet-type shutter device in its fully open state. [Figure 4] This is a side cross-sectional view of the bottom portion of the shutter case in its fully closed state. [Figure 5] This is a side cross-sectional view of the bottom portion of the shutter case in its fully open state. [Figure 6] This is a side cross-sectional view of the fully closed lower section of the shutter curtain case, with the guide rails omitted. [Figure 7] This is a plan cross-sectional view of a sheet-type shutter device. [Figure 8] This is a schematic exploded perspective view of a sheet-type shutter device. [Figure 9] This is a vertical cross-section of the main part of the shutter curtain. [Figure 10] This is a reference cross-sectional side view of the lower curtain portion of the shutter case, with the front and rear sealing materials installed at the intake opening. [Figure 11] (A), (B), and (C) are the top view, front view, and side view of the bottom of the case. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will now be described based on the drawings. In the drawings, 1 is a sheet-type shutter device, and the shutter device 1 is constructed using various components and devices, such as guide rails 2 provided on structural members (e.g., walls and columns) positioned on the left and right sides of an opening E such as an entrance or exit, a sheet-type shutter curtain 3 that opens and closes the opening E guided by the guide rails 2, a winding body 4 positioned above the opening E for winding the shutter curtain 3, an opening and closing mechanism 5 that drives the winding body 4 in forward and reverse directions, left and right brackets 6 attached to the guide rails 2 as described later, with their base ends resting on the upper ends of the guide rails 2, and a shutter case 7 attached to the left and right brackets 6 in a state that covers the winding body 4. All of these are conventional.

[0009] In this embodiment, the sheet-type shutter curtain 3 is constructed by incorporating insulating material 3b into an insertion section 3a that is shaped like a bag to provide heat insulation, with the upper and lower edges overlapping front to back. By incorporating the insulating material 3b into these insertion sections 3a, the shutter curtain 3 becomes thicker and constitutes a sheet-type shutter device 1 with heat insulation properties. Incidentally, the insulation material used is a flexible foam material (foamed material) made of synthetic resin such as polystyrene foam, polyethylene foam, polypropylene foam, and polyurethane foam. Furthermore, a bottom portion 3c is provided at the lowest end of the shutter curtain 3 to provide a thick weight function by incorporating a weight (not shown), thereby enabling smooth opening and closing of the shutter curtain 3. However, the space between the bottom portion 3c and the insertion portion 3a into which the lowest insulation material 3b is inserted is a thin portion 3d consisting only of sealing material.

[0010] The bracket 6 is roughly rectangular in shape, with bent pieces 6a, 6b, 6c, and 6d formed on its upper and lower front and rear edges, which are bent inward in the left and right directions. The left and right edges of the winding body 4 are supported by an extension 6f that extends forward in the front-rear direction (corresponding to "one side in the front-rear direction" in this invention) from a base end 6e that rests on the guide rail 2. An extension 6g is provided that extends further forward from the extension 6f of one of the brackets 6 in the left-right direction, and an electric opening and closing mechanism 5 is attached to this extension 6g. The winding body 4 is configured to rotate in the forward and reverse directions based on the forward and reverse drive of the opening and closing mechanism 5. The bracket 6 is then attached to the guide rail 2 via a mounting body 8. The mounting body 8 is fixed to the bracket 6 by bolts 8b, with a mounting piece 8a, which is bent inward in the left-right direction from its horizontal upper edge, contacting the lower bent piece 6b of the bracket 6 from below. On the one hand, the attachment body 8 is fixed to the guide rail 2 by attaching it via a bolt 8b with the rear half part 8c in a vertical plane abutting against the outer side surfaces in the left - right direction of the guide rail 2. By configuring it in this way, the bracket 6 is attached and fixed to the guide rail 2 via the attachment body 8 while being placed on the upper edge part of the guide rail 2.

[0011] On the other hand, the shutter case 7 is configured to include a case upper - surface plate 7a, a case front - surface plate 7b, a case lower - surface plate 7c, and a case rear - surface plate 7d which are integrated to form an L - shape. The case upper - surface plate 7a and the case rear - surface plate 7d are fixed to the upper bent piece 6a and the rear bent piece 6d of the bracket 6 via screws 7e. The case front - surface plate 7b abuts or is in close proximity to the front bent piece 6c of the bracket 6 from the front in a state where the case upper - surface plate 7a is fixed to the upper bent piece 6a of the bracket 6. The lower end part of the case front - surface plate 7b is provided with a front - surface - plate lower - part 7ba which is bent rearward so as to abut or be in close proximity to the lower bent piece 6b of the bracket 6 from the lower side. The front - surface - plate lower - part 7ba is fixed to the lower bent piece 6b via a screw 7e. Further, a front - surface - plate standing - part 7bb which is bent upward from the tip (rear end) of the front - surface - plate lower - part 7ba is formed, and a front - surface - plate locking - piece part 7bc is horizontally bent and formed from the upper end of the front - surface - plate standing - part 7bb toward the front.

[0012] In contrast, the lower case panel 7c is provided with a lower panel body surface portion 7ca that bulges with a gap below the lower bent piece 6b of the bracket 6. A lower panel front surface portion 7cb is formed that slopes upward and forward from the front end of the lower panel body surface portion 7ca to reach the rear end of the front panel lower surface portion 7ba. Further, from the upper end of the lower panel front surface portion 7cb, a lower panel front upright surface portion 7cc is formed in a state of adhering to the rear surface side of the front panel upright surface portion 7bb. From the upper end of the lower panel front upright surface portion 7cc, a lower panel engaging piece portion 7cd that engages with the front panel locking piece portion 7bc from above is formed in an inverted L shape. The lower panel engaging piece portion 7cd is bent at an obtuse angle (for example, 75 degrees with respect to the horizontal plane) and is configured to engage with the front panel locking piece portion 7bc from above. Since the lower panel engaging piece portion 7cd is bent at an obtuse angle, compared to a right-angled bend, accidental contact due to vibration with the tip of the front panel locking piece portion 7bc during opening and closing operations is avoided, reducing noise generation such as rubbing sounds and contact sounds. Also, consideration is given to making it easier to lock (hook) the case lower panel 7c to the long case front panel 7b.

[0013] In contrast, from the rear end of the lower panel body surface portion 7ca of the case lower panel 7c, a lower panel rear upright surface portion (corresponding to the "upright surface portion" of the present invention) 7ce is bent upward so as to face the front end surface 2a of the guide rail 2 with a gap. From the upper edge of the lower panel rear upright surface portion 7ce, a lower panel bent piece portion 7cf is formed that is bent so as to approach and face the attachment piece portion 8a of the attachment body 8 from below. On the other hand, at both the left and right ends of the lower panel body surface portion 7ca, closing plates 7cg for closing the gap between the case lower panel 7c and the attachment body 8 are provided in a state of abutting from below. The rear end portion of the closing plate 7cg is extended rearward and bent downward in a state of reaching the front end surface 2a of the guide rail 2, forming a closing plate bent surface portion 7ch. The closing plate bent surface portion 7ch is fixed to the guide rail 2 via a bolt 7e. Furthermore, an inverted L-shaped connecting fitting 9 is attached to the rear upright surface portion 7ce of the case bottom plate 7c. This connecting fitting 9 is fixed to the front end surface 2a of the guide rail 2 via an inverted L-shaped connecting receiving fitting 9a and a bolt 9b.

[0014] Furthermore, at the lower part of the base (rear end) of the shutter case 7, a swallowing opening 10 is formed, which is continuous with the guide groove 2b formed in the guide rail 2, for swallowing the shutter curtain 3 into the shutter case 3. On the front upper side of the swallowing opening 10, that is, the upper part on the winding body 4 side, a guide roller 11 is provided, which guides the shutter curtain 3 as it is swallowed from the swallowing opening 10, with both the left and right ends supported by brackets 6.

[0015] In this configuration, the shutter curtain 3 passing through the swallowing opening 10 is arranged such that the front and rear ends 12a and 13a of a pair of sealing materials 12 and 13 placed at the swallowing opening 10 interfere with the front and rear curtain surfaces by contact (sliding contact). The interference of the sealing materials 12 and 13 is configured to occur when they are bent and deformed in the vertical direction, as they are made of a flexible member made of synthetic resin. In this case, the rear sealing material 13 is configured such that its tip 13a is positioned at the insertion opening 10 in a natural, uninterfering state, by fixing its base end 13b to the lower end of the rear panel 7d of the shutter case 7 via screws 13c.

[0016] In contrast, the front sealing material (corresponding to "one of the sealing materials" in this invention) 12 is attached to a portion of the rear upright surface portion 7ce of the lower plate that is below the insertion opening 10. Specifically, an inverted L-shaped mounting bracket 14 is attached to the rear upright surface portion 7ce of the lower plate via screws 14a, and a mounting piece 14b extending to the rear of the mounting bracket 14 extends rearward from the upper and lower intermediate portion of the rear upright surface portion 7ce of the lower plate, which is lower than the swallowing opening 10, and the base end portion 12b of the front sealing material 12 is attached to the mounting piece 14b via screws 12c. The mounting position of the front sealing material 12, which is located below the intake opening 10, is set such that when the shutter curtain 3 moves upward to open, causing the front sealing material 12 to elastically deform so that its tip 12a faces upward, the tip 12a does not get caught between the shutter curtain 3 and the guide roller 11. In other words, as shown in Figure 10, if the front sealing material 12 is installed in the same way as the rear sealing material 13, with its tip 12a positioned at the intake opening 10 in its natural state, there is a risk that the front sealing material 12, which has elastically deformed during the rising process of the shutter curtain 3, may get caught and entangled between the guide roller 11 and the shutter curtain 3 at its tip 12a. Measures have been taken to prevent this from happening.

[0017] On the other hand, when the shutter curtain 3 is fully open, the bottom portion 3c at the lowest end of the shutter curtain 3 is positioned below the case bottom plate 7c, so that the thin portion 3d faces the rear upright surface portion 7ce of the bottom plate in the front and rear directions. In this case, the tip portion 12a of the front sealing material 12 is configured to contact and interfere with the thin portion 3d above the bottom portion 3c. With this configuration, when the shutter curtain 3 is fully open, the tip portion 12a of the front sealing material 12 contacts and interferes with the thin portion 3d and the insertion portion 3a, which is thinner than the bottom portion 3c but into which the heat insulating material 3b is inserted and incorporated, rather than the thick bottom portion 3c. As a result, when the shutter curtain 3 is fully open, the deflection deformation of the front sealing material 12 is smaller than when it contacts the bottom portion 3c, extending the lifespan of the front sealing material 12 and improving its durability.

[0018] In this embodiment, configured as described above, the shutter device 1 has a sheet-type shutter curtain 3, and the case bottom plate 7c of the shutter case 7 is made of a curved material that bulges downward below the opening 10 into which the shutter curtain 3 is swallowed. Furthermore, the strength of the shutter case 3 is increased by connecting the rear upright surface portion 7ce of the case bottom plate 7c to the guide rail 3.

[0019] In this design, of the pair of sealing materials 12 and 13 provided at the front and rear to interfere with the curtain surface of the shutter curtain 3, the front sealing material 12 on the winding body 4 side is attached to the rear upright surface portion 7ce of the lower plate, which is lower than the intake opening 10. As a result, the front sealing material 12 is positioned lower than the one that is located at the intake opening 10 and in the groove-shaped ceiling area formed by the shutter curtain 3 and the rear upright surface portion 7ce of the lower plate. Therefore, the deterioration state of the front sealing material 12 is easier to see, improving maintainability.

[0020] Furthermore, in this design, the front sealing material 12 is installed lower than the intake opening 10. As a result, it is further away from the guide roller 11 located on the winding body 4 side of the intake opening 10. This prevents the tip 12a of the front sealing material 12, which elastically deforms upward during the opening operation of the shutter curtain 3, from getting caught between the shutter curtain 3 and the guide roller 11, thus ensuring that the opening operation of the shutter curtain 3 is smooth.

[0021] Furthermore, when the shutter curtain 3 is fully open, the front seal material 12's tip 12a interferes with the curtain surface of the thin-walled portion 3d or insertion portion 3a above the bottom portion 3c of the shutter curtain 3. As a result, when the shutter curtain 3 is fully open, the front seal material 12 is in a state of bending deformation as it contacts a portion thinner than the bottom portion 3c, reducing the deformation of the front seal material 12, extending its lifespan, and improving its durability. [Industrial applicability]

[0022] This invention can be used as a sheet-type shutter device for opening and closing openings in buildings such as office buildings, houses, and garages. [Explanation of Symbols]

[0023] 1. Shutter device 2 Guide rails 3. Shutter Curtain 3c Bottom section 4. Winding mechanism 6 brackets 6a, 6b, 6c, 6d Folded pieces at the top, bottom, front, and back 6e Base 6f extension 7 Shutter case 7c Case bottom plate 7ca Bottom plate main body surface part 7ce Bottom plate rear side upright surface part 10 Swallowing opening 11 Guide Laura 12 Front sealant (one of the sealants) 12a Tip 13 Rear sealant (other sealant) E Opening

Claims

1. Guide rails are supported on the building structure side, positioned on the left and right sides of the opening, Left and right brackets are attached to the guide rail with their base ends resting on the upper end of the guide rail, A winding body whose left and right end edges are supported by extensions that extend to one side in the front-rear direction of the left and right brackets, A sheet-type shutter curtain is wound onto the winding body and guided by a guide rail to open and close the opening, The system includes a shutter case that is attached to the left and right brackets in a state that covers the winding body, In a sheet-type shutter device in which a swallowing opening for swallowing the shutter curtain is provided at the lower part of the base end of the shutter case, The shutter case is provided with a lower surface portion that bulges downward below the intake opening. The lower surface of the case is provided with an upright surface that faces the guide rail in the front-rear direction and is connected to the guide rail via a connecting means. In providing a pair of sealing materials on either side of the swallowing opening, with their tips interfering with the front and rear curtain surfaces of the shutter curtain, A sheet-type shutter device characterized in that, of the pair of sealing materials, one of the sealing materials that interferes with the curtain surface from the winding body side is attached to a portion below the intake opening on the upright surface.

2. An guide roller is installed on the upper side of the winding body portion of the intake opening to guide the shutter curtain. The sheet-type shutter device according to claim 1, characterized in that the lower portion to which one of the sealing materials is attached is such that when one of the sealing materials is deflected upward due to the upward movement of the shutter curtain, its tip does not reach the guide roller.

3. The shutter curtain is set so that when fully open, its lowest end is positioned below the intake opening. The sheet-type shutter device according to claim 1 or 2, characterized in that the lower portion to which the sealing material is attached is the portion in which the tip interferes with the curtain surface above the bottom portion when the shutter curtain is fully open.

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