JPS61183595A - Louver type blind - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a louvered blind. In particular, the invention relates to a blind having slats and means for tilting the slats from a generally horizontal fully open position that allows maximum solar radiation to pass between the slats to a closed position that slopes outwardly or inwardly. Specifically, slats associated with blinds that are rigid in the vertical direction, allow maximum light passage in all positions, and minimize light passage in the open and closed positions to achieve maximum concealment. between specific shapes.

BACKGROUND OF THE INVENTION Several competing objectives influence the design of louvered blinds, also known as Venetian blinds. One of the objectives is to allow maximum solar radiation to pass through when the slats are swiveled to the fully open position, and to ensure maximum blinding angle when the slats are swiveled to either fully closed position. . The second objective is to make the slats as thin as possible, minimizing the vertical dimension of the overlapping slats when the blind is raised to the top. If you can see even a slight overlap of the slats at the top of the window,
unsightly. The third purpose is to ensure that the slats remain perfectly straight during use. this is,
If the slats are even slightly bent or warped, it will be noticeable and unsightly.

However, it is not possible to simultaneously satisfy these objectives. For example, the best slats for maximum blindness and good overlap are very thin and flat slats, but
Such slats have insufficient longitudinal rigidity and tend to sag.

Thick, typical wood slats that have been in use for many years are thick enough to avoid sagging, but the vertical dimension of the slats when stacked is relatively thick and unsightly.

A compromise solution that has been used for many years is to use thin slats with arcuate cross-sections. The slats have a reasonably good overlap and have an arcuate cross-section, so that the longitudinal stiffness is adequate. However, this slat sacrifices the desired maximum solar radiation passage in the closed position and the desired minimum solar radiation and maximum blinding in the closed position.

(Problems to be Solved by the Invention) Accordingly, it is an object of the present invention to have good overlap, a small vertical dimension in the fully overlapped state, adequate longitudinal stiffness, and a conventional circular arc section. compared to the slats of
To provide a blind having slats that provide more solar radiation in the closed position and less solar radiation and more blinding angle in the closed position.

SUMMARY OF THE INVENTION In order to achieve the object of the invention, the invention comprises horizontally arranged slats supported on a cord ladder on which are arranged two pull cords and a mechanism; To provide a blind whose slats can be tilted between a fully open position where the slats are horizontal and a fully closed position where the slats are tilted downwardly inwardly or downwardly outwardly. The pull cord is positioned to pull the bottom rail upwardly and overlay the series of slats onto each other to a full overlap position at the top. The slats of the present invention are comprised of extruded vinyl strips and have a flat central portion and a pair of downwardly sloping edges on either side of the central portion forming opposing shallow passages. The angle between the flat center and the edge is a dominant angle of about 215° to 265°, and the width of the edge is about 8 to 15% of the total width of the slat.

(Operation) A feature of the present invention is that the shallow channel shape of the slats provides sufficient stiffness to avoid sagging, although it does not provide 111 degrees of longitudinal stiffness.

Another feature of the invention is that the means of overlaying is economical and aesthetically pleasing.

Yet another feature of the invention is that the slats of the invention, in the fully open position, allow 6% more solar radiation to pass through compared to conventional curved shapes.

Yet another feature of the present invention is that the slats of the present invention have a blinding angle that is 50% steeper than that of a conventional curved shape in the fully closed position, and that the maximum amount of sunlight passing through the slat in the closed position is The objective is to reduce, on average, less than 75% of the amount of solar radiation that passes through the shaped slats when they are in the closed position.

(Example) In FIGS. 1 and 2, 10 indicates the entire louver-shaped blind based on the present invention.

These figures are views from the inside of a blind 10 that covers a window or area of a pond that is to be shaded.
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fil < tl jll l Consists of 4 plurality of slats 12. These slats 12 are supported by a slat supporting cord ladder. As will be explained in more detail below, this cord ladder is provided with a mechanism for tilting the slats 12. The mechanism operates from a fully open horizontal position allowing the maximum amount of solar radiation to pass through the blinds by operating a cord ladder.
The slats 12 are inclined to a fully closed position in which they are inclined downwardly outwardly or downwardly inwardly. FIG. 1 shows the lower and outer closed position, and FIG. 2 shows the fully open position.

FIG. 3 shows the support mechanism. This mechanism consists of slats 12
The cord ladder includes a support box 14 fixed to the window frame 16 (or pond support). Inside the support box 14 is a shaft 20.
A pair of glue wheels 18 are attached which rotate around the center. A shaft 20 extends longitudinally within the support box 14 and is rotated through gears (not shown) by an external wand 22 inside the blind. Reel 18 supports the cord ladder. The cord ladder is the outer cord 24
, an inner cord 26, and a horizontal cord 28 between the two. The overall width of the slats 12 in the illustrated embodiment is 1 inch. The overall width of the transverse cord 28 measures 1.02 inches or slightly greater than the overall width of the slats 12.

There are two of these code ladders, each one for each reel.
It is supported by 8. Thus, when reel 18 is rotated, cords 24 and 26 are lowered or raised equally and simultaneously in opposite directions. Thereby, the slats are tilted by simultaneously rotating the rotary rolls 18 of the shaft 20.

Two pull cords 30 are attached and slots 32 are drilled in the slats 12 for passing one pull cord adjacent to each cord ladder. The pull cord 30 supports a bottom rail 34 (see FIG. 1) and is simultaneously pulled to lift the blind from the bottom, overlapping each slat 12 and lifting it to the top in a cluster.

The slats 12 are made of semi-rigid extruded vinyl and are made of 0.
It has a thickness of 0.020 inches and is in the form of an inverted shallow groove. Each of the groove shapes consists of a flat central portion 36 and a pair of downwardly sloping edges 38 . The illustrated dominant angle between the center portion 36 and the edge portion 38 is 2256. Approximately 215°~
It has been found that an angle of 280" can be used and that the features of the present invention can be utilized at such an angle. The edges 38 are mirror symmetrical to each other and approximately 8-15% of the total width of the slat. (It is preferable to use a shape with wider edges as it falls below the preferred range of dominant angles.)
.

FIG. 4 shows a conventional slat 40 having an arcuate cross section. This conventional example is compared with the slat 12 of the present invention as follows. When the slats 40 are horizontal and in the fully open position (see dotted line in Figure 3), the maximum opening degree against solar radiation is:
As shown in Figures 4 and 5, when the slats are rotated to the fully closed position, the maximum opening degree of the slats 120 against solar radiation is 6% less than the maximum opening degree of the arcuate slats 40. It is 60%. Slat 1 at this time
The sharpness of the blinding angle for 2 is 23° below the horizontal, while for the slat 40 it is 14° below the horizontal.

Of course, these blinding angles can be reversed by placing the slats in the opposite closed position.

It can be seen that the pull cord 30, when touching the end 42 of the slot 32, becomes an element that limits the inclination of the slat 120 blinding angle. Therefore, if you reduce the diameter of the pull cord 30,
Regardless of the slat shape, a sharp blinding angle can be obtained by reducing the opening degree. , but the slabs 40 can be closed more closely than shown in FIG. 4, but the closer they are closed, the higher the contact point 44 between the slat and one cord 26 or 24 may be, depending on the situation. .

Therefore, the slats 40 can never achieve the same degree of closure or the same blinding angle as the slats 12.

Therefore, the combination of the present invention provides a significant improvement in the passage of solar radiation and the sharpness of the blinding angle in the closed and closed positions compared to the prior art.

Additionally, they do not overlap unsightly, and these features are achieved without significantly compromising stiffness.

Although a preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that several modifications are possible, such as curved edges 38 and undulating central portion 36. Edge 3
8 can be tilted upward rather than downward to achieve a very steep blinding angle, provided that different blinding angles in the two closed positions are acceptable or desired. possible. in this case,
'As such, it is an obvious feature and is claimed as a separate feature within the essential scope of the invention. Accordingly, the invention is not limited to the examples, but rather is defined by the claims.

[Brief explanation of drawings]

Figure 1 shows a front view of a blind according to the invention, with the slats tilted outward and downward in a fully closed position; Figure 2 shows a blind according to the invention, with the slats fully open; Figure 3 is a front view shown in position; Figure 3 is an end view showing the two slats of the blind according to the invention and the interior of the broken support box; Figure 41! I is an end view showing a conventional curved slat in the fully closed position, and FIG. 5 is an end view showing the slat of the present invention in the fully closed position. 10...Blind, 12...Slat, 14...
・Support box, 16...Window frame, 18...Reel, 20・
...Shaft, 22...Wand, 24...Outer cord, 26...Inner cord, 28...Horizontal cord, 30
... Pull cord, 32 ... Slot, 34 ... Bottom rail

Claims (8)

[Claims] (1) A louvered blind in which horizontally disposed slats are supported in a common plane encompassing the area to be covered by the blind, comprising: (a) a support box mounted across the top of said area; (b) a plurality of thin elongated slats forming a shallow passage; (c) each having a pair of longitudinally parallel extending support cords and a plurality of identically dimensioned slats extending parallel and spaced apart between the support cords; (d) for each of said cord ladders, one of said support cords is attached to the inside of the blind with respect to said area, said support cords comprising: a pair of cord ladders for supporting said slats; the other being mounted on the outside, said transverse cords extending between both support cords being mounted in a plane perpendicular to the plane of the blind, thus at symmetrically spaced positions in the longitudinal direction of said support box. means for attaching the upper ends of each of said cord ladders to said support box; (e) the length of said transverse cords is substantially the same as the width of said slats disposed horizontally on said transverse cords; , placing a slat on a corresponding pair of transverse cords that are at the same height in a direction transverse to said blind; (f) varying the height of said support cords to tilt the transverse cords, thereby , means for changing the slat placed on the transverse cord from a closed position in which the inside of the slat slopes downward, to an open position in which the slat is horizontal, and to a closed position in which the outside of the slat slopes downward; (g) a pair of pull cords mounted within the support box and extending from the support box at respective positions of the pair of cord ladders; and (h) provided on the slats when the slats are installed. , a transverse slot for receiving the pull cord at a location adjacent to the transverse cord; and (i) means for securing the pull cord to a lowermost slat of the blind, the pull cord being retractable; (j) said slats are essentially:
(k) a width of each of the edges; is a louvered blind which is approximately 8-15% of the total width of said slats. (2) A louvered blind according to claim (1), wherein both of the edges slope downwardly in the plane of the central body member. (3) The louvered blind according to claim (1), wherein one of the edges slopes downwardly in the plane of the central body member and the other edge slopes upwardly. . (4) A louvered blind according to claim (1), wherein both of the edges slope above the plane of the central body member. (5) a flat central portion extending lengthwise along the longitudinal direction, substantially in a first plane, having longitudinally parallel ends; and from each of the longitudinal ends of said flat central portion; , protrudes at an angle of 35° to 80° with respect to the first plane, has approximately the same length as the flat central portion, and has a width of 8 to 15% of the width of the flat central portion. Slats for louvered blinds, consisting of sloped edges. (6) The slat according to claim (5), wherein the edge portion projects downward from the flat central portion. (7) The slat according to claim (5), wherein one of the edges protrudes upward from the flat central portion, and the other edge protrudes downward. (8) The slat according to claim (5), wherein the longitudinal ends of the edges are parallel to the longitudinal ends of the flat central part.