JP4919830B2 - Synthetic resin ventilation louvers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin ventilation louver for restraining a cross-sectional S shape and corrugated deformation even in outdoor use, by enhancing efficiency in assembling work, by fixing a deflection preventive bar to an opposed frame by easiest work, while maintaining a high Young's modulus. <P>SOLUTION: A blade 1 having a wide base board 11, a neck part 12 of its upper-lower end parts and a fitting projection strip 13 arranged via the neck part 12, is formed by extrusibly molding a synthetic resin, and a thickness change is applied for steplessly and gradually increasing the thickness of the wide base board 11 toward 2.3 mm of a central part from the thickness of 1.5 mm of the neck part 12. The ventilation louver A is formed by fastening by a screw from the opposed frame 3 to a tapping hole 23, by tightly fitting the fitting projection strip 13 to a fitting recessed strip 21 of an aluminum deflection preventive bar 2. Thinning of the central part caused by extrusion molding of the blade 1 is eliminated, and as a result, deformation and deflection of the blade 1 can be eliminated. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a synthetic resin ventilation louver that can be suitably used for louver products such as fences, surface lattices, and joinery.

  As this kind of synthetic resin ventilation louver, the present inventor slide-fits the upper and lower fitting ridges arranged on the synthetic resin blade to the fitting groove arranged on the aluminum deflection preventing bar, and By fixing the bending prevention bar to the opposing frame and rotating the fitting ridge within the fitting groove, the fitting ridge is tightly fitted to the fitting groove, and a large number of spaces are provided between the left and right opposing frames. Proposal has been made with the blades arranged.

  At this time, the louver blade is formed by extruding a synthetic resin having good weather resistance, such as polycarbonate or ASA, for example, having a vertical width of about 10 cm, a length of about 1.2 to 1.5 m, and a wall thickness of 1. The above-mentioned fitting ridges are formed in an inverted C-shaped cross-section arranged so as to protrude, for example, on the front and back of the blade. On the other hand, the anti-bending bar has an ellipse vertically and a wide opening is arranged on one side of the bar, and a tapping hole is arranged in a bridge shape at an intermediate position between the upper and lower sides. The aluminum is provided by extrusion molding with a sliding fitting of the fitting protrusion of the blade and rotating the fitting protrusion so as to arrange a loose fitting space in close contact with the inner wall.

Japanese Patent Application No. 2006-178279 (Japanese Patent Laid-Open No. 2008-8006)

  In this case, the fitting protrusion is slide-fitted into the fitting groove, and a bending prevention bar is arranged above and below the blade, and the longitudinal end portion of the bending prevention bar is fitted into, for example, a receiving groove installed in the opposing frame. When the anti-bending bar is fixed to the counter frame so that the screw from the counter frame side is screwed into the tapping hole, the blade fitting protrusion is forced to rotate and the blade It can be firmly fixed, ensuring a high Young's modulus of the blade, eliminating the bending that is likely to occur in synthetic resin blades, and eliminating the flutter noise during strong winds, and the blinding function is impaired by pressing and pulling the blade. It can be solved.

  However, the bending prevention bar is fixed to the opposite frame by, for example, fitting the bending prevention bar into the two parallel receiving grooves formed on the opposite frame and positioning the screw. However, even in this case, since the blade has a length of 1 m or more, fixing the anti-deflection bar to the opposing frame in the state where the anti-deflection bar is arranged is not possible to While there is a problem that the work is not always easy due to the forced rotation of the strip, if it is a fitting without forced rotation to facilitate the work, As a result, the high Young's modulus cannot be ensured.

  In addition, when a synthetic resin ventilation louver using this blade and an anti-bending bar was subjected to a cold temperature repeated test of, for example, −20 ° C. and 70 ° C. for 10 cycles, the blade was deformed to have a somewhat S-shaped cross section. At the same time, irregularities occurred in the vicinity of the central part in the longitudinal direction, and the blade tended to bend and deform in a wavy shape in the longitudinal direction. Ventilation louvers are often used outdoors, for example, but they are exposed to direct sunlight in summer, while they may be frozen in cold areas in winter. It is necessary to suppress the occurrence of unevenness due to repeated cold temperatures and the undulation phenomenon caused by this.

  The present invention has been made in view of such circumstances, and the problem to be solved is that the above-described anti-bending bar can be fixed to the opposing frame by an operation as easy as possible while maintaining a high Young's modulus. Thus, it is possible to improve the efficiency of assembly work and to provide a synthetic resin ventilation louver that suppresses deformation having an S-shaped cross section or undulation even when used outdoors.

Therefore, when the cause of the workability hindering the fixing of the anti-bending bar to the opposite frame was examined, when the anti-bending bar was fixed, the fitting protrusion slide-fitted to the fitting groove was forcibly rotated. In order to achieve this, it is recognized that the upper and lower ends of the blade bend by receiving a bending force. On the basis of such knowledge, the present invention makes it possible to easily turn the fitting ridge by arranging the thinned neck portions at the upper and lower ends of the blade. The arrangement of the neck portion on the premise of rotation facilitates the bending of the blade, and the workability of fixing the anti-bending bar to the opposing frame is ensured while maintaining a high Young's modulus. The fitting protrusions at the upper and lower ends arranged on the synthetic resin blade are slide-fitted to the fitting recess arranged on the aluminum deflection preventing bar, and the deflection preventing bar is attached to the opposing frame. fixing the fitting projection by rotating the fitting projection within the fitting concave and closely fitted to the fitting concave to and arranged a number of blades between the left and right opposing frame outdoor a louver for installation, thin the neck upper and lower end portions of the blade Arrangement, and it is obtained by a synthetic resin ventilating louver, characterized by comprising placing the fitting protrusion of the upper and lower ends through the 該頚 unit.

  In addition, when the cause of deformation of the blade in the S-shaped cross section and the wavy shape was sought, the width of the blade, that is, the vertical width, is relatively wide, so that the raw resin tends to flow to the upper and lower ends during extrusion molding. , Even if the set thickness of the central portion in the width direction, that is, the vertical direction is about 2 mm, for example, the upper and lower ends are actually thickened such as 1.5 to 1.6 mm, and the central portion tends to be thinned. Therefore, the strength of the central portion in the width direction is relatively impaired and the strength of the central portion in the longitudinal direction is relatively weak because the length of the blade is relatively long. The blade is closely fitted to the fitting recess of the prevention bar and firmly fixed to the deflection prevention bar, so that the thermal expansion and contraction of the blade, especially the thermal expansion in the width direction when heated There is no escape, and the thermal expansion As a result of the stress acting on the central portion in the direction, the blade is deformed so as to have an S-shaped cross section, while thermal expansion in the longitudinal direction is added to the blade, and the central portion in the longitudinal direction is further deformed in the undulating shape in the front-rear direction. It is recognized that Based on such knowledge, the inventions according to claim 2 and claim 3 avoid deformation caused by thickness reduction by avoiding thickness reduction and resultant strength reduction occurring in the central portion in the width direction. The invention according to claim 2 is a stepwise increase in thickness of the blade stepwise from the neck portion to the center portion of the upper and lower end portions so that the upper and lower center portions thereof have a maximum thickness. The synthetic resin ventilation louver according to claim 1 and the invention according to claim 3 are characterized in that the blade has a neck at the upper and lower ends so that the upper and lower central portions thereof have a maximum thickness. The synthetic resin ventilation louver according to claim 1, wherein the thickness is gradually increased from the central portion toward the central portion.

  In the present invention, these are used as means for solving the above problems as the gist of the invention.

  Since the present invention is configured as described above, the invention according to claim 1 is configured so that the fitting ridge can be easily rotated by disposing the thinned neck portions at the upper and lower end portions of the blade. The blade is easily bent by the arrangement of the neck while assuming the forced rotation of the fitting protrusion, and the workability of fixing the anti-bending bar to the opposite frame is improved while maintaining a high Young's modulus. It is possible to provide a synthetic resin ventilating louver that is secured and can be efficiently assembled.

  In addition to the above, the invention described in claim 2 and claim 3, respectively, avoids the thickness reduction that occurs in the central portion in the width direction and the resulting strength reduction, and prevents deformation accompanying the thickness reduction. Even if it is used outdoors, it can be a synthetic resin louver that suppresses deformation with a S-shaped cross section or a wavy shape.

Hereinafter, the present invention will be described in more detail with reference to the example of the drawings. A is a synthetic resin ventilation louver, and the ventilation louver A is fitted on the upper and lower fitting protrusions 13 disposed on the synthetic resin blade 1. Is slidably fitted to the fitting recess 21 disposed on the aluminum deflection preventing bar 2, and the deflection preventing bar 2 is fixed to the opposing frame 3, and the fitting projection 13 is inserted into the fitting recess 21. By rotating, the fitting protrusion 13 is tightly fitted to the fitting recess 21, and a louver for outdoor installation in which a large number of blades 1 are arranged between the left and right opposing frames 3.

  In this example, the synthetic resin blade 1 is made of, for example, a synthetic resin extruded material obtained by extruding a synthetic resin such as polycarbonate or ASA and cut into an appropriate length. The width is about 15 cm, for example about 11 to 12 cm, and the length is about 1 m or more, for example about 1.2 to 1.5 m. Is a cross-sectionally inverted C-shape that is arranged at the upper and lower ends of the blade 1 so as to protrude from the front and back. In this example, the fitting ridge 13 includes the inverted V-shaped projecting piece 14 projecting obliquely in the front-rear direction at the upper and lower ends of the blade 1 and a pair of upstanding pieces 15 respectively standing from the front and rear ends. It is C-shaped.

  In this example, the aluminum deflection preventing bar 2 is, for example, formed into an oval shape in the vertical direction, and a wide opening 22 is arranged on one side of the bar, and a tapping hole 23 is provided at an intermediate position in the vertical direction. Arranged in a bridge shape, the fitting ridge 13 of the blade 1 is slidably fitted on the wide opening 22 side of the tapping hole 23 and the fitting ridge 13 is rotated so as to be in close contact with the inner wall. The loose-fitting space 24 to be fitted is arranged, and at this time, the deflection preventing bar 2 can be commonly used above and below the blade 1 by reversing the bar. In this example, the deflection preventing bar 2 is formed by notching a part of the oval curved portion so that the opening end defining the wide opening 22 is formed in a stepped shape. Is disposed so as to have an opening angle of, for example, about 20 degrees or more, and a gap portion having a C-shaped cross section between the remaining curved portion and the bridge-shaped tapping hole 23 is formed as described above. There is a loose fitting space 24. At this time, the branch projections are arranged so that the opening ends on both sides of the wide opening 22 are branched up and down to thicken the vicinity of the opening end, It is assumed that a locking portion of the ridge 13 is formed.

  As another example of the deflection preventing bar 2, as shown in FIG. 5, for example, the thick portions on both the front and back sides of the tapping hole 23 in the upper and lower elliptical shapes are removed to steal the meat and the tapping is performed. By projecting opposite-length opposed bent pieces 25 from the holes 23, a wide-mouth opening 22 that opens to the blade 1 side with an equal front and rear width is disposed between the projecting pieces that protrude from the opposed bent pieces 25 in a vertical step shape. A step gap portion between the opposing bent piece 25 and the tapping hole 23 can be used as the loose fitting space 24 and the inside of the protruding piece can also be used as a locking portion of the fitting protrusion 13. .

  The blade 1 and the anti-bending bar 2 are provided with a fitting protrusion 13 in the fitting recess 13, particularly in the loose fitting space 24, so that the bending prevention bar 2 is slid from the longitudinal end of the blade 1, for example. By sliding fitting, the deflection preventing bars 2 are arranged at the upper and lower ends of the blade 1, and both longitudinal ends of the deflection preventing bars 2 at the upper and lower ends are in contact with each other in, for example, a facing frame 3, or, for example, The front and rear fitting grooves formed in the opposite frame 3 are respectively fitted, and screws from the opposite frame 3 side are screwed into the tapping holes 23 so that the bending prevention bar 2 is perpendicular to the opposite frame 3. By fixing, the positional relationship between the blade 1 and the deflection preventing bar 2 is displaced from the extension line of the blade 1 so that the deflection preventing bar 2 bends to one side, and the fitting protrusions 13 of the blade 1 are respectively moved at the upper and lower ends thereof. Anti-bending bar For example, the engaging portion of the fitting protrusion 13 having a C-shaped cross section is used as the engaging portion of the loose fitting space 24 of the fitting recess 21 of the deflection preventing bar 2. By locking, the close fitting is performed. At this time, the upper and lower deflection preventing bars 2 are arranged so that one upper end and the other lower end are horizontal between the upper and lower adjacent blades 1, and thereby, between the upper and lower adjacent blades 1. In addition, a ventilation space 4 is formed respectively, and the deflection preventing bar 2 is superposed through the ventilation space 4 to prevent see-through between adjacent blades 1.

  The synthetic resin blade 1 used in this manner has a thin neck portion 12 disposed at both upper and lower end portions, and the upper and lower fitting protrusions 13 are disposed through the neck portion 12. Thus, the fitting protrusion 13 of the blade 1 can be easily rotated within the fitting recess 21 of the deflection preventing bar 2. Further, in this example, the blade 1 is obtained by gradually increasing the thickness from the neck 12 at the upper and lower ends toward the center so that the upper and lower central portions have the maximum thickness. Thus, even when the blade 1 is used outdoors, the S-shaped cross section and the wave-like deformation can be suppressed.

  That is, in this example, the blade 1 is integrally provided with a wide substrate 11, a neck portion 12 at the upper and lower ends thereof, and a fitting protrusion 13 disposed on the wide substrate 11 via the neck portion 12. While the transparent resin is extruded, the extrusion is performed so that the entire surface of the blade 1 is bent in a wave-like shape in the vertical direction, thereby preventing the see-through in the front-rear direction and having a lighting property, and the wide substrate. The thickness of 11 is the above-mentioned gradually increasing change from the neck 12 side of the upper and lower ends toward the center.

  In this example, the neck portion 12 of the blade 1 is a flat strip-shaped protrusion piece disposed by standing outward in the width direction so as to form a flat strip shape on the upper and lower ends of the blade 1, respectively. The neck portion 12 is thinner than the blade 1, has a thickness that facilitates the rotation and can reliably hold the fitting protrusion 13, and allows the fitting protrusion 13 to rotate. That is, the blade 1 has a standing width that does not impede the rotation when the blade 1 touches the wide opening 21 when the fitting protrusion 13 rotates. In this example, the neck 12 is formed of a flat belt-like standing piece having a thickness of about 1.3 to 1.6 mm, for example, 1.5 mm, and a standing width of several mm, for example, 4 mm.

  In this example, the wide substrate 11 of the blade 1 has a thickness of about 1.5 to 1.7 mm on the neck 12 side, that is, on the upper and lower ends, and 2.3 to 2.5 mm on the center. In this example, the thickness of the neck 12 side is 1.5 mm, the center is 2.3 mm, and the thickness between them is set to increase gradually in a stepwise manner. The maximum thickness portion is made to have the same thickness width of several cm, for example, about 3 cm. The blade 1 is in a state in which the thickness of the blade 1 is gradually changed, for example, with a pitch of 4 to 5 mm in the vertical direction and an unevenness of about 0.2 to 0.3 mm in the front and rear, the surface of the blade 1 is corrugated. It is for blindfold.

  Thus, by arranging the neck portion 12 which is thinner than the blade 1 at the upper and lower end portions of the blade 1, the neck portion 12 becomes relatively weaker than the strength of the other portions of the blade 1. The fitting protrusion 13 is forcibly rotated in the bending direction of the bending prevention bar 2 at the upper and lower ends thereof, and the engaging portion of the fitting protrusion 13 having the C-shaped cross section is moved to the bending prevention bar 2. The close fitting by engaging with the engaging portion of the loose fitting space 24 in the fitting recess 21 can be performed very easily and reliably. That is, when the neck portion 12 is not disposed on the blade 1 and the thickness of the blade 1 is set to about 1.5 to 2 mm, for example, the strength of the blade 1 is the same in the width direction. The operation of fixing the blade 1 to the opposing frame 3 in the state where the blade is disposed, that is, the operation of performing the close fitting is not always easy, but the forced rotation of the fitting protrusion 13 is caused by the arrangement of the neck 12. Assembling of the ventilation louver A that secures a high Young's modulus is made possible by eliminating the problem that the blade 1 is made of synthetic resin, that is, the problem that the Young's modulus is low. Therefore, the work efficiency can be increased as much as possible.

  In addition, by gradually increasing the wall thickness of the blade 1, it becomes possible to perform extrusion molding that suppresses the phenomenon that the raw material resin flows to the upper and lower ends and the central portion is thinned during the extrusion molding. Even if the central part is thinned due to the mold, extrusion pressure, etc., the thickness of the central part can be kept as small as possible, and the thickness of the central part can be maintained as much as possible. While being exposed to direct sunlight in summer, it is possible to suppress the occurrence of unevenness due to cold temperatures, particularly thermal expansion, which can be frozen in cold areas in winter, and the undulation phenomenon caused by this.

  That is, the ventilation louver A of the example using the blade 1 of this example and the ventilation louver of the comparative example using the blade 1 having a set wall thickness of 2 mm without arranging the neck 12 for comparison. As a body, a cold temperature repetition test of −20 ° C. and 70 ° C., 10 cycles was performed. As a result, the blade 1 of the comparative example exhibited an S-shaped cross section between the anti-deflection bars 2 as shown in FIG. As shown in FIG. 10, the blade of the embodiment has almost no deformation as shown in FIG. 10 and exhibits a straight line between the deflection preventing bars 2 and no wavy deformation at all. I got it.

  In the figure, 5 is a column used to install the ventilation louver A by fixing the opposing frame 3, and 31 is a screw that is screwed into the column 5 from the opposing frame 3 to fix the opposing frame 3 to the column 5. , 6 is an upper horizontal frame, 7 is a lower horizontal frame, and 61 is a lower portion from a step portion of the upper horizontal frame 6 in a step arrangement in which a ventilation guide port is formed between the upper and lower deflection frames 2 and 6 at the upper end. A hanging fin that hangs down to prevent the upper end bending prevention bar 2 from being exposed is shown.

  The example shown in the drawing is as described above. However, the gradual increase in the wall thickness of the blade is performed in a stepwise change instead of the stepless change, and the fitting ridge is formed in the cross section. In carrying out the present invention, including a solid block shape instead of a C-shaped one, a blade, its fitting protrusion, a bending prevention bar, its fitting groove, opposite Each specific shape, structure, material, relationship between these, the addition to these, etc., such as the frame and the neck can be in various forms as long as they do not contradict the gist of the invention.

It is a front view of a ventilation louver. It is a longitudinal cross-sectional view which shows the structure of a ventilation louver. It is a longitudinal cross-sectional view which shows the relationship between a bending prevention bar and a braid | blade. FIG. 4 is a partially enlarged view of FIG. 3. It is a longitudinal cross-sectional view which shows the relationship between the bending prevention bar of another example, and a braid | blade. It is a cross-sectional view of the support | pillar part which shows the installation state of a ventilation louver. It is a longitudinal cross-sectional view of a blade. It is the elements on larger scale of FIG. It is a longitudinal cross-sectional view of the comparative example which shows the S-shaped deformation | transformation of a braid | blade. It is a longitudinal cross-sectional view of the Example using the braid | blade of FIG.

A Synthetic resin ventilation louver 1 Blade 11 Wide substrate 12 Neck part 13 Neck 13 Mating protrusion 14 Reverse V-shaped protrusion 15 Standing piece 2 Deflection prevention bar 21 Mating recess 22 Wide opening 23 Tapping hole 24 Free fitting space 25 Opposing Bending piece 3 Opposing frame 31 Screw 4 Ventilation space 5 Prop 6 Upper horizontal frame 61 Hanging fin 7 Lower horizontal frame

Claims (3)

The fitting protrusions on the upper and lower ends arranged on the synthetic resin blade are slide-fitted to the fitting recess arranged on the aluminum bending prevention bar, and the bending prevention bar is fixed to the opposing frame and the fitting is performed. A louver for outdoor installation in which a plurality of blades are arranged between right and left opposing frames by closely fitting the fitting ridge to the fitting groove by rotating the fitting ridge within the groove. A synthetic resin ventilating louver comprising thin necks disposed at both upper and lower ends of the blade, and the upper and lower fitting ridges disposed through the necks.   2. The blade according to claim 1, wherein the blade is gradually increased in thickness stepwise from the neck portion to the center portion of the upper and lower end portions so that the upper and lower center portions thereof have a maximum thickness. Synthetic resin ventilation louvers.   2. The blade according to claim 1, wherein the blade is gradually increased in thickness from the neck portion of the upper and lower end portions toward the center portion so that the upper and lower center portions thereof have a maximum thickness. Synthetic resin ventilation louver.

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