JP2545947Y2 - Pleated blinds - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to improvement of pleated blinds.

[Prior Art] Pleated blinds are known from Japanese Utility Model Laid-Open No. 2-99194. In the known pleated blind, a bottom rail is attached to the lower edge of the shade member, and one lifting cord is suspended from the left and right sides of the head box to form a lifting cord hole drilled in the center between the pleats of the shade member. The lower end is fixed to the bottom rail. When the elevating cord is raised and the shade member is contracted, the blind is opened, and when the elevating cord is lowered by its own weight of the bottom rail and the shade member is deployed, the blind is closed.

[Problem to be Solved by the Invention] When the blind is deployed, the weight of the shade member below it and the weight of the bottom rail are applied to each pleat of the shade member as a load, so as shown in FIG.
The higher the pleats, the greater the load, which increases the pleat opening. Accordingly, the upper pleat has a large opening, that is, the vertical interval between the pleats is wide, and the lower pleat has a small opening, that is, the vertical interval between the pleats is narrow. Therefore, the pleat opening degrees are not uniform and the appearance is poor. To prevent the pleats from being irregularly arranged, two tapes on the left and right sides of the shade member are fixed to the pleats at equal intervals to regulate the pleat opening. There is a possibility that the shape of the entire shade member may be changed.

The present invention has been made to solve this problem, and an object of the present invention is to provide a pleated blind in which the pleat opening is uniform from top to bottom without attaching the opening restriction tape. It is in.

[Means for Solving the Problems] In order to achieve the above object, the present invention adopts
When two plungers are suspended from the left and right sides of the head box, they pass through the elongated hole at the center of the vertical interval of each pleat of the shade member, and when the pleat opening reaches a predetermined angle, both ends of the elongated hole However, the contact between the front and rear lifting cords restricts the pleat opening.

[Operation] In the blind of the present invention, the two elevating cords arranged in front and rear pass through a long hole in the front-rear direction at the center of each pleat interval of the shade member. Assuming that the width before and after the long hole is L, the pleat opening when the two front and rear cords contact both poles of the long hole is given by the following equation.

θ = 2arccos (I / L) For example, the front-to-back length of the long hole is 1.4
When it is doubled, θ becomes about 90 degrees, the pleat opening is specified at 90 degrees, and the pleats of the blind are about open from top to bottom.
Since it is aligned at 90 degrees, it presents a good appearance.

[Example] The pleated blind of the present invention will be described based on an example shown in the drawings.

As shown in FIGS. 1 and 2, the upper edge of the shade member 10 is fixed to the head box 12, and the lower edge is fixed to the bottom rail 14, respectively. The front and rear two lifting cords 20 pass through a long hole 16 extending forward and backward at the center of each pleat 11 of the shade member 10, and the lower ends thereof are fixed to the bottom rail 14 via knots. The lifting cord 20 is the lifting cord hole of the head box 12.
The inside enters from 13 and proceeds to one end via a guide roll 15, from which it is drawn out through a stopper (not shown). The front and rear width L of the long hole 16 in the front and rear direction provided at the center of the vertical interval of each pleat of the shade member 10 is 2
It is longer than the interval of the lifting code 20 of the book. I / L in the figure
= 0.866. When the blinds are unfolded, the pleats 11 open and the two lifting cords 20 abut on both ends of the long hole 16, and the pleats 11 cannot be further opened. It is defined by the ratio between the interval I and the front and rear width L of the slot 16, and is given by its opening θ = 2arccos (I / L). The figure shows I / L =
Since 0.866, θ = 60 degrees is specified, and the pleat opening of the blind is 60 degrees uniformly from top to bottom,
The appearance of the blinds is clean and good.

[Effects of the invention] As described above, the pleated blind of the present invention regulates the pleat opening degree by the two plunging cords arranged in front and rear striking both ends of a long hole formed in the shade member. Even if it is not attached, when the blind is deployed, there is an excellent effect that the opening of all the pleats from top to bottom can be made uniform.

[Brief description of the drawings]

FIG. 1 is a side view of a pleated blind according to an embodiment of the present invention, FIG. 2 is a perspective view of a main part of FIG. 1, and FIG. 3 is a view corresponding to FIG. In the drawing, reference numeral 10 denotes a shade member, 11 denotes pleats, 12 denotes a head box, 14 denotes a bottom rail, 16 denotes a long hole, and 20 denotes a lifting cord.

Claims (1)

(57) [Scope of request for utility model registration] 1. A head box (12), a shade member (10) having an upper edge fixed to the head box, pleats (11) formed at equal intervals on the shade member, and Bottom rail (14) fastened to lower edge
An elevating cord through hole (16) drilled at the center between the pleats of the shade member; In a pleated blind comprising left and right lifting cords (20) fixed to the front and rear, the left and right lifting cords (20) are arranged in front and rear, and the lifting and lowering cord through holes are formed in elongated holes (16) extending in front and rear. A pleat blind characterized in that a front-rear width (L) of the slot and an interval (I) between the front and rear elevation cords are set in accordance with a predetermined opening θ of the pleat (11).