JP2015218430A - Blind operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blind operation device.SOLUTION: A blind operation device of the present invention includes a pulley 10 over which a ball chain 9 is looped, and a pulley case 3 for housing the pulley 10. A chain guide 33 or a slope part 323, which assumes a shape satisfying the inequality: R>(180×d)/(3.14×θ)-r, is formed in an opening 3a of the pulley case 3 for inserting the ball chain 9. In the inequality, R represents a radius of curvature; d represents a ball pitch; θ represents a slope angle; and r represents a ball diameter.

Description

  The present invention relates to a blind operating device such as a horizontal blind, a raised curtain, a pleated screen, and a roll blind.

  Blinds that operate the ball chain to move the slats up and down include horizontal blinds, vertical blinds that guide the slats, roll blinds that raise and lower the screen, curtains that raise and lower the curtain fabric, pleated curtains, etc. .

  In these blind operating devices, the ball chain is mounted on a pulley that is rotatably supported by the head box. When the pulley is rotated by operating the ball chain, the angle of the slat is adjusted and the slat is raised and lowered. It has become so.

  In such an operation device using a ball chain, when one of the endless ball chains suspended from the pulley is pulled downward to move the slat up and down, the other ball chain suspended from the pulley swings. Since it is pulled up while colliding with a pulley case, noise may be generated.

  Therefore, a technique for reducing noise by attaching a soft cushioning material to the pulley case (see, for example, Patent Document 1) and a pulley having unevenness that meshes with the ball of the ball chain are separately provided on the pulley case. A technique (see, for example, Patent Document 2) that reduces noise by hanging from a pulley via a pulley is disclosed.

JP 2008-144528 A JP 2010-261174 A

  As disclosed in Patent Document 2, the technique of reducing noise by hanging a ball chain from a pulley through a pulley can reliably avoid collision of the ball chain with a pulley case, etc. It is effective for conversion. However, there is a problem that the operating device is increased in size by the provision of the pulley. For example, in a two-layer type pleated screen in which two screens are arranged in front and back, the front-and-rear width of the operating device increases because of the two-layer type, and noise generated by the ball chain colliding with a pulley case or the like is more likely to occur. Tend to be. For this reason, even if it can reduce the said noise by providing a pulley, since the further enlargement of the front-back width of an operating device may impair aesthetics, it is unpreferable.

  On the other hand, as disclosed in Patent Document 1, the technique of reducing the noise by attaching a soft cushioning material to the pulley case can avoid an increase in the size of the operating device, but the durability of the soft cushioning material is not limited. There is concern about sex.

  In view of the above problems, an object of the present invention is to provide a blind operating device.

An operating device according to a first aspect of the present invention is a blind operating device, comprising a pulley for mounting a ball chain and a pulley case for housing the pulley, and an opening of the pulley case through which the ball chain is inserted. Part
R> (180 × d) / (3.14 × θ) −r
here,
R: radius of curvature,
d: Ball pitch,
θ: slope angle,
r: ball diameter,
The slope part of the shape which satisfy | fills is formed.

  In the operating device according to the first aspect of the present invention, the slope portion is formed of a hard material.

Furthermore, the operating device according to the second aspect of the present invention is a blind operating device, comprising a pulley for hanging the ball chain, and a pulley case for housing the pulley, and the pulley case for inserting the ball chain. At the opening of
R> (180 × d) / (3.14 × θ) −r
here,
R: radius of curvature,
d: Ball pitch,
θ: slope angle,
r: ball diameter,
A chain guide having a shape satisfying the above condition is provided.

  In the operating device according to the second aspect of the present invention, the chain guide is made of a hard material.

  According to the present invention, it is possible to avoid the increase in size of the operating device and to effectively reduce the noise generated by the collision of the ball chain with the pulley case or the like.

It is a front view which shows schematic structure of the 2 layer type pleats screen provided with the operating device of one Embodiment by this invention. It is a top view which shows schematic structure of the 2 layer type pleats screen provided with the operating device of one Embodiment by this invention. It is a side view showing a schematic structure of a 2 layer type pleat screen provided with an operation device of one embodiment by the present invention. (A), (b) is a perspective view which shows the pulley plate and pulley cover which comprise the pulley case in the operating device of one Embodiment by this invention. It is a front view explaining the chain guide attached to the pulley case in the operating device of one embodiment by the present invention. (A) is sectional drawing which shows the comparative example of the pulley case with respect to the operating device of one Embodiment by this invention, (b) is sectional drawing which shows schematic structure of the pulley case in the operating device of one Embodiment by this invention It is.

  Hereinafter, a two-layer pleated screen according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of a two-layer pleated screen including an operating device according to an embodiment of the present invention. FIG. 2 is a plan view showing a schematic configuration of a two-layer pleated screen including the operating device according to the embodiment of the present invention. FIG. 3 is a side view showing a schematic configuration of a two-layer pleated screen including the operating device according to the embodiment of the present invention. In the present specification, with respect to the front view of the pleated screen shown in FIG. The left direction in the figure is defined as the left side of the pleat screen, and the right direction in the figure is defined as the right side of the pleat screen. When referred to as the front-rear direction of the pleated screen, it refers to a direction perpendicular to the illustrated surface in the plan view of FIG.

  The two-layer pleated screen shown in FIGS. 1 to 3 includes two screens 15F that can be bent in a zigzag shape vertically from a head box 1 fixed to a mounting surface via a bracket 2. 15R are arranged side by side in the front-rear direction. Respective bottom rails 8F and 8R are attached to the lower ends of the screens 15F and 15R. One end of the lifting / lowering cords 14F and 14R is attached to the bottom rails 8F and 8R, and the other end of the lifting / lowering cords 14F and 14R is attached to the winding shafts 5F and 5R in the head box 1. Further, between the bottom rails 8F, 8R and the head box 1, pitch holding cords 13F, 13R having annular support cords 131F, 131R that respectively pass through the lifting cords 14F, 14R are respectively connected to the screens 15F, It arrange | positions so that the joining piece provided in 15R may be supported.

  A pulley case 3 is attached to one end of the head box 1. A pulley 10 is rotatably accommodated in the pulley case 3, and a plurality of recesses into which the ball portions 9 a of the ball chain 9 are fitted are formed on the outer peripheral surface of the pulley 10.

  An endless ball chain 9 is wound around the pulley 10. The ball chain 9 includes ball portions 9a connected by a cord portion 9b at predetermined intervals. A portion of the ball chain 9 that is not wound around the pulley 10 is suspended through the opening 3a of the pulley case 3 and is divided into a front chain 9F and a rear chain 9R.

  The pulley 10 is connected to a transmission gear 7 composed of a plurality of gears, and the transmission gear 7 is connected to the transmission clutches 11F and 11R. Therefore, the rotation of the pulley 10 is transmitted to the rotational drive shafts 16F and 16R via the transmission clutches 11F and 11R by the transmission gear 7.

  The take-up shaft 5F, which is rotatably supported in the head box 1, is rotated by the rotation of the rotary drive shaft 16F, and the screen 15F is raised / lowered by winding and unwinding the lifting / lowering cord 14F by the rotation of the take-up shaft 5F. . Similarly, the winding shaft 5R rotatably supported in the head box 1 is rotated by the rotation of the rotary drive shaft 16R, and the screen 15R is wound by winding and rewinding the lifting / lowering cord 14R by the rotation of the winding shaft 5R. Go up and down.

  Between the winding shafts 5F and 5R arranged on the left and right, stopper devices 4F and 4R for controlling the rotation of the rotation drive shafts 16F and 16R are arranged, respectively. The stopper devices 4F and 4R are connected to the bottom rails 8F and 8R. When the ball chain 9 is released after the lifting operation, it functions to prevent the bottom rails 8F and 8R from dropping their weight.

  Further, on the side of the stopper devices 4F and 4R, the rotational drive shafts 16F and 16R are inserted into the governor devices 6F and 6R. The governor devices 6F and 6R have a function of suppressing the rotation speed of the rotary drive shafts 16F and 16R to a predetermined value or less and suppressing the descending speed when the bottom rails 8F and 8R are lowered by their own weight to a predetermined speed or less.

  Further, a lower limit device for setting the lower limit position of the bottom rails 8F, 8R by setting the maximum rewinding amount of the lifting / lowering cords 14F, 14R from the winding shafts 5F, 5R at the other end of the head box 1. 12F and 12R are provided.

  The operation of this two-layer pleated screen will be described. When the front chain 9F of the ball chain 9 is pulled downward, the rotational force generated by the force is transmitted to the transmission clutches 5F and 5R via the pulley 10. At this time, only the transmission clutch 5F transmits the rotation to the rotation drive shaft 16F, and only the rotation drive shaft 16F is rotated. Then, the winding shaft 5F is rotated by the rotation of the rotary drive shaft 16F, the lifting / lowering cord 14F is spirally wound, and the bottom rail 8F attached to the tip of the lifting / lowering cord 14F is raised.

  When the hand is released from the ball chain 9 in this state, the stopper device 4F is activated to prevent the bottom rail 8F from dropping its own weight. Subsequently, when the hand is released after pulling the ball chain 9 downward again, the self-weight drop prevention operation of the stopper device 4F is released, the lifting cord 14F is rewound from the winding shaft 5F, and the bottom rail 8F is lowered. To do.

  On the other hand, when the rear chain 9R of the ball chain 9 is pulled downward, the rotational force generated by the force is transmitted to the transmission clutches 5F and 5R via the pulley 10. At this time, only the transmission clutch 5R transmits the rotation to the rotation drive shaft 16R, and only the rotation drive shaft 16R is rotated. Then, the winding shaft 5R is rotated by the rotation of the rotary drive shaft 16R, the lifting / lowering cord 14R is spirally wound, and the bottom rail 8R attached to the tip of the lifting / lowering cord 14R is raised.

  When the hand is released from the ball chain 9 in this state, the stopper device 4R is actuated to prevent the bottom rail 8R from dropping its own weight. Subsequently, when the ball chain 9 is pulled again downward and then released, the stopper device 4R is released from its own weight drop prevention operation, the lifting cord 14R is unwound from the winding shaft 5R, and the bottom rail 8R is lowered. To do.

  According to this two-layer pleated screen, the screens 15F and 15R can be individually opened and closed with only one endless ball chain 9. In such a two-layer pleated screen, since the two-layer type is used, the front and rear width of the pulley case 3 constituting the operating device is increased, and more noise is generated due to the ball chain 9 colliding with the pulley case 3 and the like. It tends to be easy to do. Therefore, since the operation device according to the present invention is configured as described below, it is possible to avoid the increase in size of the operation device and to effectively reduce noise caused by the collision of the ball chain 9 with the pulley case 3 and the like. Be able to.

(Operating device)
The operation device according to the present embodiment includes a pulley case 3 and a pulley 10, and the pulley case 3 includes a pulley plate 31 and a pulley cover 32 to which a chain guide 33 is attached. 4A and 4B are perspective views showing the pulley plate 31 and the pulley cover 32 that constitute the pulley case 3 in the operation device according to the embodiment of the present invention.

  The pulley plate 31 and the pulley cover 32 are each formed of a hard resin material, and the positioning concave portion 311 of the pulley plate 31 and the positioning convex portion 321 of the pulley cover 32 are fitted together and integrated with a mounting screw or the like, The pulley case 3 can be configured. The opening 3a of the pulley case 3 is formed by the gap when the pulley plate 31 and the pulley cover 32 are fitted together. Further, the shaft hole of the central axis of the pulley 10 is inserted into the support shaft 322 provided in the pulley cover 32, and the pulley 10 is rotatably accommodated in the pulley case 3.

  The slope portion 323 of the pulley cover 32 constitutes a constituent portion of the opening 3a of the pulley case 3, and corresponds to a portion that causes the rear chain 9R to come into contact and cause noise. In the example of this embodiment, the chain guide 33 is fixed so as to follow the shape of the slope portion 323. As will be described later with reference to FIGS. 5 and 6, the chain guide 33 is formed of a hard material, for example, a metal material, which is molded into a predetermined shape and obtains high durability.

  First, the defined shape of the chain guide 33 will be described with reference to FIG. FIG. 5 is a front view for explaining the chain guide 33 attached to the pulley case 3 in the operating device according to the embodiment of the present invention. The chain guide 33 is formed such that the radius of curvature R satisfies the following formula (1) in the range S constituting the slope portion 323.

R> (180 × d) / (3.14 × θ) −r (1)
here,
R: radius of curvature,
d: Ball pitch,
θ: slope angle,
r: Ball diameter

  By providing the chain guide 33 formed as described above in the opening 3a of the pulley case 3, noise caused by the collision of the ball chain 9 with the pulley case 3 and the like can be effectively reduced. This point will be described in more detail with reference to FIG. FIG. 6A is a cross-sectional view showing a comparative example of the pulley case 3 with respect to the operating device according to the embodiment of the present invention, and FIG. 6B is a schematic configuration of the pulley case 3 in the operating device according to the embodiment of the present invention. FIG.

  First, referring to the comparative example of FIG. 6A, in this comparative example, an example in which the pulley case 3 is constituted by one part is shown, but the ball portion 9a and the cord portion 9b of the rear chain 9R are Alternatingly, it abuts against the slope portion 323 in the opening 3a of the pulley case 3 (see view A), and noise is generated.

  On the other hand, as shown in FIG. 6B, according to the pulley case 3 in the operating device of the present embodiment, the chain guide formed on the slope portion 323 of the pulley cover 32 with the curvature radius R satisfying the formula (1). 33 is fixed. The radius of curvature R is longer than the ball pitch d of the rear chain 9R, and two or more ball portions 9a ride on the chain guide 33 (see B), so that the noise is reduced. .

  As described above, according to the operating device of the present embodiment, it is possible to avoid an increase in size of the operating device and to effectively reduce noise generated by the collision of the ball chain 9 with the pulley case 3 or the like.

  The present invention has been described above with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. For example, in the above-described embodiment, the example in which the operating device according to the present invention is applied to a two-layer pleated screen has been described. However, the embodiment includes a single-layer pleated screen and can be applied to any blind operating device. .

  In the above-described embodiment, the example in which the chain guide 33 is fixed so as to follow the shape of the slope portion 323 of the pulley cover 32 has been described. However, the shape of the chain guide 33 itself satisfies the above formula (1). As long as it is formed in this way, the slope portion 323 may have another form.

  In the above-described embodiment, the example in which the chain guide 33 is formed with a substantially single curvature radius in the range S configuring the slope portion 323 has been described, but the shape is formed with a plurality of curvature radii. However, it can be formed so as to satisfy the formula (1).

  In the above-described embodiment, the example using the chain guide 33 has been described. However, when the slope portion 323 can be formed of a hard material whose durability is not regarded as a problem, the expression (( The slope portion 323 may be formed so as to satisfy 1).

  In the above-described embodiment, the example in which the pulley case 3 is configured by the two members of the pulley plate 31 and the pulley cover 32 has been described. However, the pulley case 3 may be configured by one member or by three or more members.

  According to the present invention, noise generated by the collision of the ball chain 9 with the pulley case 3 or the like can be effectively reduced, and therefore, the present invention is useful for a blind application using the ball chain 9.

3 Pulley Case 9 Ball Chain 9F Front Chain 9R Rear Chain 9a Ball Chain Ball 9b Ball Chain Cord 10 Pulley 31 Pulley Plate 32 Pulley Cover 33 Chain Guide

Claims (4)

A blind operating device,
A pulley for hanging the ball chain;
A pulley case for accommodating the pulley;
In the opening of the pulley case through which the ball chain is inserted,
R> (180 × d) / (3.14 × θ) −r
here,
R: radius of curvature,
d: Ball pitch,
θ: slope angle,
r: ball diameter,
An operating device characterized in that a slope portion having a shape satisfying the above is formed.   The operating device according to claim 1, wherein the slope portion is formed of a hard material. A blind operating device,
A pulley for hanging the ball chain;
A pulley case for accommodating the pulley;
In the opening of the pulley case through which the ball chain is inserted,
R> (180 × d) / (3.14 × θ) −r
here,
R: radius of curvature,
d: Ball pitch,
θ: slope angle,
r: ball diameter,
An operation device characterized in that a chain guide having a shape satisfying the requirements is provided.   The operating device according to claim 3, wherein the chain guide is made of a hard material.