Bottom structure in a sheet-type shutter device

Abstract

In a bottom portion 3c provided at the lower end of a sheet-type shutter curtain 3, bottom weights 7 are placed at both left and right edges of the bottom portion 3c, preventing the middle portion of the bottom portion 3c in the left-right direction where the bottom weights 7 are not present from bending and deforming. [Solution] A cylindrical cushioning material 8 is placed in the left-right intermediate section of the bottom portion 3c where there is no bottom weight 7, and a deformation prevention material 9 for preventing deformation of the bottom portion 3c is housed inside the cylinder of the cushioning material 8.

Description

Technical Field

[0001] The present invention relates to the technical field of the bottom structure in 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 along the guide rails to open and close the opening, a winding body (winding drum, winding wheel) arranged in the upper space (ceiling part) of the opening where the shutter curtain is wound, and left and right brackets that are attached to the body side member above the opening and support the left and right edge parts of the winding body, and is composed of various member devices. And among such shutter devices, there is one in which the shutter curtain is made of a sheet type instead of a slat type. And since the sheet-type shutter curtain has a light weight, it cannot be expected to lower itself by its own weight as in the case of a slat-type shutter curtain. Therefore, a bottom part with a bottom weight installed therein is provided at the lower end part of the shutter curtain, and consideration is given so that the closing movement of the shutter curtain can be carried out smoothly by the weight of the bottom part. By the way, the sheet-type shutter curtain is considered so that when an obstacle such as a person or luggage comes into contact in the closed state, it flexes and deforms in the front-rear direction to reduce damage to the obstacle and avoid damage to the shutter curtain itself. And such consideration also applies to the bottom part. Therefore, the bottom part is configured to be a split type in which the bottom weights are arranged on both the left and right sides, so that the middle part in the left-right direction (central part) flexes and deforms in the front-rear direction (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003] [Patent Document 1] Japanese Patent Publication No. 2008-63798 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, when such a sheet-type shutter curtain is made flexible and bendable in the middle section of the bottom part without a bottom weight, when the shutter curtain opens and closes, the left and right ends of the shutter curtain are wound under tension due to the weight of the bottom weight, while the middle section in the left and right direction, which lacks a bottom weight, is not wound under tension like the left and right ends, resulting in an imbalance in the wound state. As a result, as the shutter curtain is opened and closed repeatedly, the middle section in the left and right direction becomes bent when wound, causing problems such as disruption of the shutter curtain's winding posture, and these are the 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 is a bottom structure for a sheet-type shutter device comprising guide rails provided on the left and right sides of an opening, a sheet-type shutter curtain that opens and closes the opening guided by the guide rails, a winding body disposed in the space above the opening and on which the shutter curtain is wound, a cylindrical bottom portion formed at the lower edge of the shutter curtain, and the bottom portion having bottom weights on both the left and right sides and a cushioning material disposed between the left and right bottom weights, wherein the bottom portion is provided with a deformation prevention material to prevent deformation of the cushioning material disposed portion of the bottom portion. The invention of claim 2 is a bottom structure for a sheet-type shutter device according to claim 1, characterized in that the cushioning material is formed using a soft resin foam material, and the deformation-preventing material is a long object formed from a flexible hard resin material and assembled to the cushioning material. The invention of claim 3 is a bottom structure for a sheet-type shutter device according to claim 2, characterized in that the cushioning material is formed in a cylindrical shape and the deformation-preventing material is housed inside the cylinder of the cushioning material. The invention of claim 4 is a bottom structure for a sheet-type shutter device according to claim 2, characterized in that the cushioning material is configured to be expandable by being cut or notched along its entire length, or is made of a sheet material, and the deformation prevention material is wrapped in the expandable cushioning material or sheet material. The invention of claim 5 is a bottom structure for a sheet-type shutter device according to claim 4, characterized in that the deformation-preventing material is wrapped with a cushioning material, and the cushioning material, which has the deformation-preventing material wrapped in a spiral shape, is secured via an adhesive tape material. The invention of claim 6 is a bottom structure for a sheet-type shutter device according to claim 1, characterized in that the cushioning material is made of a soft resin foam material, the deformation prevention material is made of a bottom weight, the bottom weight which serves as the deformation prevention material is positioned in the left-right central part of the bottom section, and the cushioning material is positioned between the bottom weight in the left-right central part and the bottom weights on both the left and right sides. [Effects of the Invention]

[0006] By adopting the invention of claim 1, in a shutter device in which the shutter curtain is of the sheet type, the bottom portion provided at the lower end of the shutter curtain is fitted with bottom weights on both the left and right sides and a cushioning material disposed between the left and right bottom weights, so that when an obstacle comes into contact with the bottom portion, the middle portion of the bottom portion in the left-right direction flexes and deforms, while a deformation prevention material is provided in the area where the cushioning material is installed in the bottom portion. As a result, the middle portion of the bottom portion in the left-right direction does not flex unintentionally, and smooth opening and closing operation is achieved. By adopting the invention of claim 2, the cushioning material is formed using a soft resin foam material, and the deformation prevention material is a long object made from a flexible hard resin material and assembled to the cushioning material. As a result, the deformation prevention material is integrated with the cushioning material, making it more compact. As a result of the invention of claim 3, the deformation-preventing material is housed inside the cylindrical cushioning material, and the deformation-preventing material can be compactly housed inside the cushioning material. By adopting the invention of claim 4, the cylindrical cushioning material is configured to be expandable by being cut or notched along its entire length, or is made of a sheet material, and the deformation prevention material is wrapped in the expandable cushioning material or sheet material. As a result, the deformation prevention material is prevented from moving unintentionally, and the deformation prevention material can be stably positioned. By adopting the invention of claim 5, the wrapping of the deformation-preventing material with the cushioning material is achieved by securing the cushioning material, which has spirally wrapped around the deformation-preventing material, via adhesive tape. As a result, the wrapping does not collapse, and stable wrapping can be achieved over a long period of time. By adopting the invention of claim 6, the cushioning material is made of a soft resin foam material, and the deformation prevention material is made of a bottom weight. The bottom weight, which serves as the deformation prevention material, is positioned in the left-right center of the bottom portion, and the cushioning material is positioned between the bottom weight in the left-right center and the bottom weights on both sides. This allows the bottom weight to be used as the deformation prevention material, thus avoiding the need to prepare the deformation prevention material as a separate part. [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 view of a sheet-type shutter device. [Figure 3] This is a plan view of the guide rail section. [Figure 4] (A) and (B) are front and side views of the shutter curtain. [Figure 5] This is a side view of the bottom section of the shutter curtain. [Figure 6] This is a front view of the bottom section of the shutter curtain. [Figure 7] This is a front view of the vertical cross-section of the bottom section. [Figure 8] (A) and (B) are cross-sectional views AA and BB of Figure 7. [Figure 9] This is a front view of the bottom portion of the second embodiment in vertical cross-section. [Figure 10] (A) and (B) are cross-sectional views of A-A and BB in Figure 9. [Figure 11] This is a front view of the vertical cross-section of the bottom portion of the third embodiment. [Figure 12] (A) and (B) are cross-sectional views AA and BB of Figure 11. [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 composed of various components and devices such as guide rails 2 provided on the left and right sides of an opening E such as an entrance, a sheet-type shutter curtain 3 that is guided by the guide rails 2 to open and close the opening, a winding body 4 positioned above the opening E to wind up the shutter curtain 3, and an opening / closing mechanism 5 that drives the winding body 4 in the forward and reverse directions. All of these are conventional, and its basic configuration is the same as that described in the aforementioned Patent Document 1, so the details will be omitted except for the components necessary to explain the present invention.

[0009] The shutter curtain 3 is provided with two adjacent bag-shaped insertion sections 3a for inserting and incorporating an insulating material 6, with the upper and lower edges overlapping each other front to back, in order to provide heat insulation. The insulating material 6 is incorporated into these insertion sections 3a, thereby forming a shutter device 1 with heat insulation functionality. Incidentally, the insulation materials used are flexible foam materials (foamed materials) made of synthetic resins such as polystyrene foam, polyethylene foam, polypropylene foam, and polyurethane foam.

[0010] The lower edge of the shutter curtain 3 configured as described above forms a bottom portion 3c in which a cylindrical bottom space X is formed by folding back a bottom sheet portion 3ba that is the lower edge of the sheet material 3b constituting the shutter curtain 3, and fixing the leading edge 3bc of the folded-back portion 3bb to the sheet material 3b by fixing means such as sewing, adhesion, or fusion. And this bottom portion 3c is further covered with an exterior material 3d, whereby the bottom portion 3c has a two-layer (double) structure. The lower edge 3da of the exterior material 3d is arranged with a space below the lower edge 3bd of the bottom sheet portion 3ba, and thus an auxiliary bottom space Y is formed between the lower edge 3bd of the bottom sheet portion 3ba and the lower edge 3da of the exterior material 3d in the bottom portion 3c.

[0011] In the bottom space X of the bottom portion 3c configured as described above, weights of the same amount and width of the bottom weights 7 are arranged on both left and right edge portions. On the other hand, in the middle portion (central portion) in the left-right direction of the bottom portion 3c between the left and right bottom weights 7, a buffer material 8 and a deformation prevention material 9 for preventing deformation of the arrangement portion of the buffer material 8 are arranged in an enclosed state. The buffer material 8 is a soft and flexible foam material (foamed material) made of synthetic resin such as polyethylene foam, polypropylene foam, or polyurethane foam. The buffer material 8 in this embodiment is configured to be expandable by forming a notch portion 8a that is cut out over the entire length for a cylindrical shape.

[0012] On the other hand, the deformation prevention material 9 is made of a hard or semi-hard synthetic resin material such as polyvinyl chloride, polystyrene, polyester, or polyethylene terephthalate. The deformation prevention material 9 is configured as a cylindrical body with a smaller diameter than the buffer material 8 and is housed inside the cylinder of the buffer material 8. Incidentally, as a method for housing the deformation prevention material 9 in the cushioning material 8, one end of the deformation prevention material 9 may be inserted from one end of the cushioning material 8. However, in this case, if the width of the opening E is wide, a large working space will be required. Therefore, there are two methods for inserting and assembling the deformation prevention material 9 into the cushioning material 8 by forcibly fitting it through the notch 8a, or inserting and assembling it into the cushioning material 8 with the notch 8a widened. Of course, either of these methods may be adopted.

[0013] Furthermore, in this embodiment, an auxiliary weight (weight rubber) 10 having rubbery elasticity is inserted and incorporated into the auxiliary bottom space Y of the bottom portion 3c. The length of the auxiliary weight 10 is set such that the left and right end edges 10a overlap the left and right inner end edges of the bottom weights 7 placed at both ends, and it plays the role of providing weight load to the left and right intermediate portion of the bottom portion 3c where the bottom weights 7 are not placed.

[0014] In this embodiment configured as described above, the shutter device 1, in which the shutter curtain 3 is of the sheet type, has bottom weights 7 on both the left and right sides and a cushioning material 8 disposed between the left and right bottom weights 7 installed inside the bottom portion 3c provided at the lower end of the shutter curtain 3. This is designed so that when an obstacle comes into contact with the bottom portion 3c, the middle portion of the bottom portion 3c in the left-right direction flexes and deforms, while a deformation prevention material 9 is provided in the middle portion of the bottom portion 3c in the left-right direction where the cushioning material 8 is installed. As a result, the middle portion of the bottom portion 3c in the left-right direction does not flex unintentionally due to an imbalance in the winding state of the shutter curtain 3 with respect to the winding body 4, and smooth opening and closing operation is achieved. Incidentally, in this embodiment, the bottom weight 7 is of a divided type to accommodate the fact that the left and right widths of the shutter curtain 3 differ in width corresponding to the width of the opening E, and the necessary number of bottom weights 7 corresponding to the shutter curtain are arranged on the bottom part 3c.

[0015] Moreover, in this case, the cushioning material 8 is formed using a soft resin foam material, and the deformation prevention material 9 is a long object made from a flexible hard resin material and assembled to the cushioning material 8. As a result, the deformation prevention material 9 is integrated with the cushioning material 8, making it more compact. In this design, the deformation-preventing material 9 is housed inside the cylindrical cushioning material 8, resulting in the deformation-preventing material 9 being compactly housed within the cushioning material 8. Furthermore, when housing the deformation-preventing material 9 in the cushioning material 8 in this manner, the cylindrical cushioning material 8 is configured to be expandable by forming a notch 8a along its entire length. As a result, when housing the deformation-preventing material 9 in the cushioning material 8, it is possible to either force the deformation-preventing material 9 into the notch 8a or insert it with the notch 8a expanded, thus simplifying the assembly process.

[0016] It should be noted that the present invention is not limited to the above-described embodiments. The cushioning material 8 does not have to be a notched portion 8a with a defined width, but may simply be a material cut along its entire length. In this case, the deformation-preventing material 9 can be inserted by force or inserted by expanding it.

[0017] Furthermore, when using a notched portion 8a or a cushioning material 8 that has been cut, the method is not limited to simply inserting and assembling it, but may also be such that the deformation-preventing material 9 is wrapped in a spiral shape, as shown in the second embodiment in Figures 9 and 10. This configuration allows for stable placement of the deformation-preventing material 9. In this case, adhesive tape 11 or double-sided adhesive tape or similar tape material will be used to secure the cushioning material 8, which is wrapped in a spiral shape around the deformation-preventing material 9, so that it does not lose its shape. Furthermore, when wrapping the deformation-preventing material 9 with the cushioning material 8, it is also possible to make the cushioning material 8 a flat sheet material instead of a cylindrical one, and wrap the deformation-preventing material 9 with the sheet-shaped cushioning material 8.

[0018] In yet another embodiment of the present invention, as shown in the third embodiment in Figures 11 and 12, the same material as the bottom weight 7 is used as the deformation prevention material 9a, and the deformation prevention material 9a is placed in the left-right center of the bottom portion 3c, thereby preventing the left-right intermediate portion of the bottom portion 3c from bending and deforming. In this case, the same material as the bottom weight 7 placed on both the left and right sides can be used as the deformation prevention material 9a, so the bending deformation can be prevented without increasing the number of parts. [Industrial applicability]

[0019] This invention can be used as a bottom structure in a sheet-type shutter device for opening and closing openings in buildings such as office buildings, houses, and garages. [Explanation of Symbols]

[0020] 1. Shutter device 2 Guide rails 3. Shutter Curtain 3b Sheet material 3c Bottom section 4. Winding mechanism 7 Bottom weight 8 Cushioning material 8a Notch 9. Deformation prevention material 9a Deformation prevention material E Opening

Claims

1. The opening comprises guide rails provided on the left and right sides of the opening, a sheet-type shutter curtain that opens and closes the opening guided by the guide rails, and a winding body positioned in the space above the opening on which the shutter curtain is wound. In a sheet-type shutter device in which a cylindrical bottom portion is formed at the lower edge of the shutter curtain, and bottom weights on both the left and right sides and a cushioning material disposed between the left and right bottom weights are housed in the bottom portion, The bottom section structure of a sheet-type shutter device is characterized in that a deformation-preventing material is provided in the bottom section to prevent deformation of the cushioning material area of ​​the bottom section.

2. The cushioning material is formed using a soft resin foam material. The bottom structure of the sheet-type shutter device according to claim 1, characterized in that the deformation-preventing material is a long object formed from a flexible hard resin material and is assembled to the cushioning material.

3. The bottom structure of a sheet-type shutter device according to claim 2, characterized in that the cushioning material is formed in a cylindrical shape, and the deformation-preventing material is housed inside the cylinder of the cushioning material.

4. The cushioning material is configured to be expandable by cutting or notching along its entire length, or it is made of sheet material. The bottom structure of the sheet-type shutter device according to claim 2, characterized in that the deformation-preventing material is wrapped in an expandable cushioning material or a sheet material.

5. The bottom structure of the sheet-type shutter device according to claim 4, characterized in that the cushioning material encasing the deformation-preventing material is secured to the cushioning material, which has been spirally wrapped around the deformation-preventing material, via adhesive tape.

6. The cushioning material is made of soft resin foam, and the deformation prevention material is made of bottom weights. The bottom structure of a sheet-type shutter device according to claim 1, characterized in that the bottom weight, which serves as the deformation prevention material, is positioned in the left-right center of the bottom section, and a cushioning material is positioned between the bottom weight in the left-right center and the bottom weights on both sides.

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