JP2018009353A - Screen shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen shutter that offers high air-tightness, heat insulation property and sound insulation property when a screen is closed, as both side edges of the screen come in contact with a vertical casing, and prevents damaging of the screen caused by abrasion with the vertical casing when the screen is opened/closed, as a gap is formed between the screen and the vertical casing.SOLUTION: A flexible bottom rail 6 is suspended by lifting cords 41, 42 inserted into a part close to both side edges of a screen 3 and at an intermediate part. A differential motion mechanism provided on a take-up device 7 of the lifting cords 41, 42 causes the lifting cord 42 at the intermediate part to be delivered ahead of the lifting cord 41 near both side edges while the screen 3 is being lifted/lowered. Thus, the bottom rail 6 is lifted/lowered in a curved state protruding downward.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a screen shutter installed in a building opening or the like for the purpose of light shielding, airtightness, heat insulation and the like. More specifically, the present invention relates to a screen shutter that opens and closes a screen formed by folding a flexible sheet material with a certain width so that the screen can be expanded in the vertical direction.

  A screen shutter, also called a pleat screen, is known which is formed by forming a large number of pleats with a constant width on a flexible sheet material, and alternately folding them so that they can be expanded in the vertical direction (for example, Patent Document 1).

  In addition, a plurality of sheet materials are overlapped and partially joined to form a hollow cylindrical part with a longitudinal cross section of hexagonal, rhombus, triangle, etc., folded in the vertical direction and stretched. A screen shutter called a honeycomb screen, a box screen, or the like that has been made possible is also known (for example, Patent Document 2).

  Furthermore, screen shutters in which hollow cylindrical portions are multilayered indoors and outdoors to improve heat insulation and sound insulation are also known (for example, Patent Documents 3 and 4).

  This type of screen shutter is a basic component for opening and closing the screen, a head box that is connected to the upper edge of the screen and fixed to the upper frame of the opening, and is inserted vertically into the screen. The lifting / lowering cord, the winding device assembled in the head box so that the lifting / lowering cord can be fed out, the bottom rail connected to the lower edge of the screen and suspended by the lifting / lowering cord, and connected to the winding device An operation cord or an operation rod suspended from the indoor side of the screen is provided.

Japanese Patent Laying-Open No. 2015-105556 JP-A-6-299767 JP 2007-197906 A JP2013-87534A

  This type of screen shutter is often installed in an opening of a building for the purpose of light shielding, airtightness, heat insulation and the like. Therefore, in a state where the screen is lowered to the lowest position, it is desirable that the both side edges of the screen and the left and right vertical picture frames of the opening are sealed so as not to generate a gap.

  However, if the width dimension of the screen is matched with the inner method of the opening, when the screen is opened and closed, both side edges of the screen rub against the vertical frame and the screen is damaged or soiled. For this reason, this type of screen shutter is often attached in such a way that a minute gap is formed between both side edges of the screen and the vertical picture frame.

  Under such circumstances, the gap formed between the both side edges of the screen and the vertical picture frame reduces the airtightness, heat insulation, and sound insulation performance required for the screen shutter. Particularly in the winter season, condensation on the window surface of the opening and cold draft in which cold air touching the window surface flows into the room along the floor surface is likely to occur, and the comfortability is greatly impaired.

  In order to improve such a problem, a groove or convex guide rail that engages both side edges of the screen may be provided inside the opening surface of the vertical frame to close the gap between the screen and the vertical frame. Conceivable. However, the folding screen itself is flexible and easily deformed, and the folding width (indoor / outdoor depth) changes depending on the position during opening and closing, so the screen and the guide rail are securely sealed. The fact is that it is difficult to do.

  The present invention has been made in view of such circumstances, and in a state where the screen is extended to the lowest position, the gap between the both side edges of the screen and the vertical picture frame is reliably closed, high airtightness, heat insulation, It is an object of the present invention to obtain sound insulation properties and prevent the screen from being damaged by rubbing with the vertical frame by preventing the screen from contacting with the vertical frame when the screen is opened and closed.

  In order to solve the above-mentioned problems, a screen shutter of the present invention includes a screen formed by folding a flexible sheet material in the vertical direction so as to be stretchable, a lifting cord inserted in the vertical direction inside the screen, A screen, comprising: a bottom rail connected to a lower edge of the screen and suspended by a lifting / lowering cord; and a winding means provided on an upper portion of the screen for opening and closing the screen by feeding and winding the lifting / lowering cord. In the shutter, the bottom rail is formed to be flexible enough to bend in the vertical direction by its own weight, and the lifting / lowering cord includes at least one of the vicinity of both side edges of the screen and an intermediate portion of the screen. The winding means is inserted into a place where the lifting length of the lifting cord in the vicinity of both side edges and the lifting cord of the intermediate portion are A differential mechanism for generating a difference between the length and the length of the protruding portion, and when the screen is raised and lowered, the raising and lowering cords of the intermediate portion are advanced before the raising and lowering cords in the vicinity of both side edges, whereby the bottom rail When the screen is extended to the lowest position, when the screen is extended to the lowest position, the lifting length of the lifting cord in the intermediate portion and the feeding length of the lifting cord in the vicinity of both side edges are A configuration is adopted in which the bottom rails are held in a substantially horizontal state.

  According to this configuration, when the screen is opened and closed, the bottom rail is curved, so that the horizontal width of the screen is slightly reduced. Therefore, even when the width of the screen is formed to match the full width of the frame of the opening where the screen shutter is installed, a gap is formed between the side edges of the screen and the vertical frame when the screen is opened and closed. Abrasion of both is avoided. When the screen is extended to the lowest position, the bottom rail is held in a substantially horizontal state, and both side edges of the screen come into contact with the vertical frame. Thereby, when the screen is fully closed, preferable airtightness, heat insulation, sound insulation and the like can be obtained.

  Furthermore, the screen shutter of the present invention is such that even when the screen is folded to the uppermost position, the feeding length of the lifting / lowering cords in the intermediate portion matches the feeding length of the lifting / lowering cords in the vicinity of both side edges. A configuration is adopted in which the rail is held in a substantially horizontal state. According to this configuration, the bottom rail is held in a substantially horizontal state even when the screen is fully opened, and a favorable aesthetic appearance is obtained.

  Further, in the present invention, as a specific configuration of the winding means including the differential mechanism that generates a difference between the feeding length of the lifting / lowering cord in the vicinity of both side edges and the feeding length of the lifting / lowering cord in the middle portion, An intermediate winding piece that winds up the lifting cord in the middle portion, a double-side edge winding piece that winds up the lifting cord in the vicinity of both side edges, and the intermediate winding piece and both-side edge winding pieces on the same axis. A common winding shaft that rotates integrally, and the intermediate winding piece is formed to have an equal diameter, and the lifting cord is fed out at a uniform speed according to the rotation of the winding shaft, Both side edge winding pieces are tapered around the beginning and end of the lifting and lowering cord, and immediately after the screen starts to be stretched, the lifting and lowering cord is delayed from the intermediate winding and is fed out. , Just before the expansion of the screen The over de than the intermediate portion winding frame can be made unwinding much as the lagging amount.

  In the present invention, the bottom rail having flexibility enough to bend in the vertical direction by its own weight can be formed by laminating a plurality of strip plates made of thin steel plates without being bonded to each other, for example. .

  The screen shutter of the present invention configured as described above is a differential mechanism that generates a difference between the extension length of the lifting / lowering cord near the side edges and the extension length of the lifting / lowering cord in the middle when the screen is opened / closed. The bottom rail connected to the lower edge of the screen is moved up and down by the action of the winding means having the above. Therefore, even when the horizontal width of the screen is formed to fill the full width of the frame of the opening, the horizontal width of the screen is slightly reduced during the opening and closing operation of the screen, and a gap is formed between the vertical frame. Friction between the screen and the vertical picture frame is avoided.

  When the screen is extended to the lowest position, the bottom rail is held in a substantially horizontal state, and both side edges of the screen come into contact with the vertical frame. Thus, when the screen is fully closed, favorable airtightness, heat insulation, sound insulation and the like are obtained, and the occurrence of condensation and cold drafts in winter is suppressed.

1 is a schematic front view showing a basic configuration of a screen shutter according to an embodiment of the present invention. It is the front schematic of the state which folded the screen of the said screen shutter in the uppermost position. It is a front schematic diagram of the state in the middle of opening and closing the screen of the screen shutter. It is the schematic front view of the state which extended the screen of the said screen shutter to the lowest position.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a basic configuration of a screen shutter 1 according to an embodiment of the present invention. The illustrated screen shutter 1 includes a screen 3 that is hung inside a frame 2 and the like surrounding an opening, and is opened and closed by folding and extending in a vertical direction. A plurality of screen shutters 1 are inserted into the screen 3 in a vertical direction. The lifting / lowering cord 4 (41, 42) of the book, the head box 5 connected to the upper edge of the screen 3 and fixed to the upper frame 21 of the opening, and the lifting / lowering cord 4 connected to the lower edge of the screen 3 A bottom rail 6 to be held, a winding device (winding means) 7 provided on the upper portion of the screen 3 to open and close the screen 3 by feeding and winding the lifting / lowering cord 4, and connected to the winding device 7 An operation rod or other operation tool 8 or the like suspended from the indoor side of the screen 3 is provided.

  As the screen 3, various conventionally known materials can be applied as long as a flexible sheet material such as a polyester nonwoven fabric is folded in a vertical direction with a certain width. In the present invention, the material, cross-sectional shape, cross-sectional detail size, etc. of the screen 3 are not particularly limited. However, the horizontal width of the screen 3 is formed to have the same size as the inner method between the vertical frame frames 22 and 22 of the opening where the screen shutter 1 is installed, or slightly larger (about 1 to 2 mm). Shall be.

  The lifting / lowering cord 4 for opening and closing the screen 3 has a horizontal width at two locations in the vicinity of the left and right side edges of the screen 3 and at least one intermediate portion (two locations in the illustrated embodiment) in the horizontal width direction of the screen 3. It is inserted in a position that is symmetric in the direction. The substantial working lengths of the lifting / lowering cords 4 are all the same.

  The head box 5 connected to the upper edge of the screen 3 has an appropriate shape, and the winding device 7 is accommodated therein. The winding device 7 includes winding pieces 71 and 72 corresponding to the number of the lifting cords 4 and a common winding shaft 73 that integrally rotates the winding pieces 71 and 72 on the same axis. Yes. An operating tool 8 for opening and closing the screen 3 is connected to one end of the winding shaft 73.

  The illustrated winding device 7 includes a differential mechanism that generates a difference between the feeding length of the lifting / lowering cord 41 in the vicinity of both side edges and the feeding length of the lifting / lowering cord 42 in the intermediate portion. Specifically, the winding pieces 72 at the two intermediate parts for winding the lifting code 42 at the intermediate part are formed in an equal-diameter cylindrical shape, and are lifted at a uniform speed according to the rotation of the winding shaft 73. The cord 42 is formed so as to be fed out. On the other hand, the winding pieces 71 at two ends on both sides of the lifting cord 41 in the vicinity of both side edges wind up the tapered reduced diameter portion 71 a that winds up the vicinity of the starting end of the lifting cord 41 and the intermediate portion of the lifting cord 41. The constant diameter part 71b and the taper-shaped enlarged diameter part 71c which winds up the terminal vicinity vicinity of the raising / lowering cord 41 have comprised the shape which continues.

  Therefore, when these winding pieces 71 and 72 rotate at the same angular velocity in conjunction with the rotation of the winding shaft 73, the beginning of feeding is relative to the length of the lifting / lowering cord 42 fed out from the winding piece 72 at the intermediate portion. Thus, the length of the lifting / lowering cord 41 fed from the winding pieces 71 at both ends is shortened. During feeding, the lifting cords 41 and 42 are fed out equally from the winding piece 72 at the intermediate portion and the winding pieces 71 at both ends while maintaining the difference at the beginning of feeding. At the final stage of feeding, the length of the lifting / lowering cord 41 fed from the winding piece 71 at both ends becomes longer than the length of the lifting / lowering cord 42 fed from the winding part 72 at the intermediate portion. Are canceled out, and finally the feeding lengths of the lifting / lowering cords 41 and 42 are aligned.

  At the time of winding, the length of the lifting / lowering cord 41 wound around the winding pieces 71 at both ends is longer than the length of the lifting / lowering cord 42 wound around the winding piece 72 at the intermediate portion. During winding, the lifting cords 41 and 42 are evenly wound around the winding piece 72 at the intermediate portion and the winding pieces 71 at both ends while maintaining the difference at the beginning of winding. In the final stage of winding, the length of the lifting / lowering cord 42 wound around the winding piece 72 at the intermediate portion is longer than the length of the lifting / lowering cord 41 wound around the winding piece 71 at both ends, and the initial difference is By offsetting, the winding lengths of the lifting / lowering cords 41 and 42 are finally aligned.

  Each winding piece 71, 72 is provided with a groove (not shown) for fixing the winding position of the lifting / lowering cords 41, 42 in order to properly maintain the feeding length of the lifting / lowering cords 41, 42. More preferably.

  The bottom rail 6 connected to the lower edge of the screen 3 is flexible enough to bend in the vertical direction by its own weight. The flexibility is, for example, the extent to which the central part is suspended 1 to 2 cm below the both ends when the both ends of the bottom rail 6 having a length of 1 m are suspended. Such a bottom rail 6 is formed by, for example, laminating 2 to 4 strips made of thin steel plates having a thickness of about 0.3 to 0.5 mm, and bending them independently without connecting them together. It can be formed by bundling in a state.

  As shown in FIG. 3, the screen shutter 1 configured in this manner has a gap between the extension length of the lifting / lowering cord 41 in the vicinity of both side edges and the extension length of the lifting / lowering cord 42 in the middle when the screen 3 is opened and closed. By generating the difference, the bottom rail 6 connected to the lower edge of the screen 3 moves up and down in a curved state. Therefore, even if the horizontal width of the screen 3 is formed to fill the inner frame between the vertical picture frames 22 and 22, the horizontal width of the screen 3 is slightly reduced during the opening and closing operation of the screen 3, A gap is formed between the vertical frame 22 and the friction between the two is avoided.

  And in the state which the screen 3 extended to the lowest position, as shown in FIG. 4, the difference at the time of initial feeding is eliminated, and the bottom rail 6 is hold | maintained in a substantially horizontal state. As a result, both side edges of the screen 3 abut against the left and right vertical frame frames 22 and 22, and preferable airtightness, heat insulation, sound insulation, and the like are obtained.

  Further, as shown in FIG. 2, even when the screen 3 is folded to the uppermost position, the bottom rail 6 is held in a substantially horizontal state, and a favorable aesthetic appearance is obtained.

  It should be noted that the technical scope of the present invention should not be construed as limited by the illustrated embodiments, but should be conceptually interpreted based on the description of the claims. In carrying out the present invention, the specific material and structure of the bottom rail 6 and the detailed configuration and parts of the winding device 7 (particularly the differential mechanism) are within a range in which substantially the same operational effects as the exemplary embodiment can be obtained. Of course, the shape and the like can be modified as appropriate. The winding device 7 may be operated either manually or electrically.

DESCRIPTION OF SYMBOLS 1 Screen shutter 2 Frame 21 Upper frame 22 Vertical frame 3 Screen 4 (41, 42) Lifting cord 5 Head box 6 Bottom rail 7 Winding device 71, 72 Winding piece 73 Winding shaft 8 Operation tool

Furthermore, in the screen shutter of the present invention, even when the screen is folded to the uppermost position, the feeding length of the lifting / lowering cords in the intermediate portion and the feeding length of the lifting / lowering cords near the both side edges match, A configuration is adopted in which the bottom rail is held in a substantially horizontal state. According to this configuration, the bottom rail is held in a substantially horizontal state even when the screen is fully opened, and a favorable aesthetic appearance is obtained.

Claims (4)

A screen formed by folding a flexible sheet material in the vertical direction so that it can be extended;
An elevating cord inserted vertically in the screen;
A bottom rail connected to the lower edge of the screen and suspended by a lifting cord;
Winding means for opening and closing the screen by feeding and winding the elevating cord provided on the screen;
In a screen shutter comprising:
The bottom rail is formed so as to be flexible enough to bend in the vertical direction by its own weight,
The lifting cord is inserted in the vicinity of both side edges of the screen and at least one place in the middle of the screen,
The winding means is provided with a differential mechanism that generates a difference between the feeding length of the lifting cord near the both side edges and the feeding length of the lifting cord in the intermediate portion,
When opening and closing the screen, the lifting and lowering cord of the intermediate part is advanced before the lifting and lowering cord near the both side edges, so that the bottom rail is raised and lowered in a curved state so as to protrude downward, and
When the screen is extended to the lowest position, the feeding length of the lifting / lowering cords in the middle portion matches the feeding length of the lifting / lowering cords in the vicinity of both side edges, and the bottom rail is held in a substantially horizontal state.
A screen shutter characterized by that. The screen shutter according to claim 1.
Even when the screen is folded to the uppermost position, the feeding of the lifting / lowering cords in the intermediate portion and the feeding length of the lifting / lowering cords in the vicinity of both side edges coincide with each other, and the bottom rail is held in a substantially horizontal state. ,
A screen shutter characterized by that. The screen shutter according to claim 1 or 2,
The winding means includes an intermediate winding piece that winds the lifting cord of the intermediate portion, a side edge winding piece that winds the lifting cord in the vicinity of the both side edges, and the intermediate winding piece and both side edges. A common winding shaft that rotates the winding piece on the same axis on the same axis;
The intermediate winding piece is formed to have an equal diameter, and the lifting cord is fed out at an equal speed according to the rotation of the winding shaft,
The both-side edge winding pieces are tapered in the vicinity of the beginning and end of the lifting / lowering cord, and the lifting / lowering cord is delayed from the intermediate winding piece immediately after the screen starts to be stretched. Extending immediately before completion of expansion of the screen, the lifting / lowering cord is configured to extend more than the intermediate winding frame by the amount of the delay,
A screen shutter characterized by that. The screen shutter according to claim 1, 2 or 3,
The bottom rail is formed by laminating a plurality of strip plates made of thin steel plates without being bonded to each other.
A screen shutter characterized by that.

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