JP4475484B2 - blind - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blind, and more particularly to a blind with improved connection of a ladder cord to a bottom rail.
[0002]
[Prior art]
In the conventional horizontal blind, as shown in FIG. 6A, a bottom rail 24 is provided at the lower end of the ladder cord 14 that supports the slats 16 in an aligned state on the middle cord 14a of the ladder cord 14 at the lowest level. It is supported. The front and rear vertical cords 14b and 14b below the lowermost middle cord 14a are accommodated in a through hole 24a formed at the bottom of the bottom rail 24, and the tape holder 100 covering the through hole 24a is placed at the bottom. The ladder cord 14 and the bottom rail 24 are connected by being locked to the rail 24 (FIG. 6B) and sandwiching the ladder cord 14 between the tape holder 100 and the bottom rail 24.
[0003]
[Problems to be solved by the invention]
Normally, the height of the blind is manufactured in units of about 1 cm. However, depending on the mounting location, the bottom surface of the bottom rail 24 may come into contact with the lower part of the window frame or the floor when the blind is completely lowered. It must be used without worrying about the contact, or it must be operated so that the blind does not fall any further by operating the stopper just before contacting the lower part of the window frame or the floor. However, if careful attention is not paid when the blind is lowered, it is not preferable because a collision noise is generated when the bottom rail 24 comes into contact with the lower part of the window frame or the floor surface.
[0004]
Although it is conceivable to remove the tape holder 100 from the bottom rail 24 and adjust the position where the ladder cord 14 is clamped, the tape holder 100 is used to securely clamp the ladder cord 14 with the bottom rail 24. Since the tape holder 100 is firmly attached to the bottom rail 24, it takes time to remove the tape holder 100 once attached from the bottom rail 24, and furthermore, it is difficult to finely adjust the clamping position of the ladder cord 14. It is.
[0005]
Alternatively, the bottom slat 16 is pulled out, the bottom rail 24 is placed on the slat 16, and the middle cord 14a of the ladder cord 14 holding the bottom rail 24 is moved upward by one pitch, thereby increasing the height of the blind. Although the size can be reduced, there is a problem that even in this case, fine adjustment of 1 pitch (usually 1 pitch of 20 mm) or less cannot be performed. If the adjustment is made too much and the blinds become too short, light leakage may occur from the bottom of the window.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a blind capable of performing fine adjustment of the blind height dimension finer than the conventional example with a simple operation.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the blind according to the first aspect of the present invention supports a large number of slats in an aligned state by a ladder cord suspended from the head box, and the upper end of the ladder cord is provided in the head box. In the blind that is connected to the ladder cord support device and the bottom rail of the ladder cord is connected to the bottom rail located below the slat row, a holder is attached to the bottom rail, and the holder is adjusted so that it can be rotated with respect to the holder. The drum is pivotally supported, a gear portion is formed on the peripheral surface of the adjustment drum, and a receiving portion is formed on the holder to clamp the ladder cord between the gear portion and the gear portion and the receiving portion are clamped. by connecting the ladder cord to the bottom rail, by rotating by operating the adjusting drum portion to be clamped of the ladder cord moves ladder Over de characterized in that the height of the bottom rail being sent outside the fed or bottom rail in the bottom rail is changed.
[0008]
By rotating the adjustment drum, the portion where the ladder cord is clamped is moved between the holder and the ladder cord exposed to the outside is drawn into the holder, or conversely, the ladder cord is sent out to the outside. By doing so, the exposed length of the ladder cord, that is, the height dimension from the bottom rail to the head box can be changed, and the height dimension of the blind can be adjusted. Since the portion to be sandwiched can be slightly changed by the rotation of the adjustment drum, the height of the blind can be finely adjusted.
[0009]
According to a second aspect of the present invention, the ladder cord in the vicinity of the portion clamped between the gear portion and the receiving portion is prevented from being wound around the adjustment drum in the vicinity of the holder according to the first aspect. Thus, a guiding portion for guiding the separation of the ladder cord from the adjustment drum is formed. As a result, the ladder cord is securely clamped between the holder receiving portion and the gear portion of the adjustment drum without the ladder cord being wrapped around the adjustment drum and obstructing the clamping as the adjustment drum rotates. Can do.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 are views showing an embodiment of a blind according to the present invention.
[0011]
The horizontal blind 10 has a head box 12 attached to a wall surface or a ceiling surface via a bracket 11, and a multi-stage slat is formed by a ladder cord 14 suspended from a ladder cord support device 17 in the head box 12. 16 is supported to be tiltable. The ladder cord support device 17 includes, for example, a shaft 18 that extends in the longitudinal direction in the head box 12 and is pivotally supported, and a drum 20 in which the upper end of the ladder cord 14 is coupled so as to be wound and unwound. It consists of. The shaft 18 is connected to an operation rod 22 extending downward from the head box 12 via a rotation transmission mechanism (not shown).
[0012]
A bottom rail 24 is disposed below the slat 16. One end of an elevating cord 26 is connected to the bottom rail 24, and the other end of the elevating cord 26 is inserted into each slat 16 and introduced into the head box 12, and is guided to one end in the width direction of the head box 12. It is led out from the head box 12 and connected to the operation knob 27.
[0013]
As shown in FIG. 2 in an enlarged manner, the ladder cord 14 has front and rear vertical cords 14b and a middle cord 14a that connects the vertical cords 14b. Through holes 24a and 24b are formed on the bottom and top surfaces of the bottom rail 24 corresponding to the position in the width direction of the blind where the ladder cord 14 and the lifting / lowering cord 26 are routed. One end 26 a of the lifting / lowering cord 26 passes through the through hole 24 b, and a knot 26 b formed at the one end 26 a is locked to the through hole 24 b in the bottom rail 24. Further, the lower ends of the front and rear vertical cords 14b extending further downward from the lower middle cord 14a of the ladder cord 14 are introduced into the bottom rail 24 by a tape holder 30 attached to the lower portion of the bottom rail 24. Has been.
[0014]
Specifically, as shown in FIG. 3, the tape holder 30 has an opening 30a formed at the center thereof, and around the opening 30a, there are four protruding wall portions 30b protruding upward in the circumferential direction. It is formed away from. A periphery of the opening 30a excluding these protruding wall portions 30b is a recess 30c. Further, a locking portion 30d bent slightly inward is formed at the front and rear ends of the tape holder 30, and the locking portion 30d is formed so as to protrude forward and backward at the lower end portion of the bottom rail 24. By locking to the locked portion 24c, the tape holder 30 is fixed to the lower portion of the bottom rail 24. At the same time, the opening 30a coincides with the through hole 24a of the bottom rail 24, and the projecting wall portion 30b is connected to the through hole 24a. It protrudes inside. The locking portion 30d is formed with notches 30e through which the vertical cords 14b and 14b before and after the ladder cord 14 are inserted.
[0015]
An adjustment drum 32 is fitted into the opening 30 a of the tape holder 30. The adjusting drum 32 has an annular protrusion 32a fitted in an annular groove 30f provided at the inner edge of the opening 30a, and a flange 32b provided at the tip of the adjustment drum 32 is locked to the tip of the protrusion wall 30b. It is pivotally supported with respect to. A gear portion 32 c is formed on the peripheral surface of the adjustment drum 32. Further, an adjustment groove 32d is formed on the lower surface of the adjustment drum 32 (FIG. 4), and an end of a driver or a coin can be inserted into the adjustment groove 32d.
[0016]
The lower ends of the two vertical cords 14b and 14b inserted through the notch 30e of the tape holder 30 pass through a gap between the recess 30c of the tape holder 30 and the lower surface of the bottom rail 24, and a plurality of protruding wall portions From between 30 b, it passes through between the gear portion 32 c of the adjustment drum 32 and the protruding wall portion 30 b and is introduced into the bottom rail 24. The ladder cord 14 is coupled to the bottom rail 24 by sandwiching the two vertical cords 14b and 14b between the gear portion 32c and the protruding wall portion 30b. Two opposing projecting wall portions 30b1 of the four projecting wall portions 30b function as receiving portions for sandwiching the vertical cord 14b with the adjustment drum 32, and the remaining two opposing projecting wall portions Reference numeral 30 b 2 functions as a guiding portion for guiding the vertical cord 14 b other than the sandwiched portion so as to separate from the adjustment drum 32. By the protruding wall portion 30b2 functioning as the guide portion, the lower ends of the two vertical cords 14b and 14b are introduced into the bottom rail 24 so as to be separated from the adjusting drum 32 and away from each other. A clip 34 is attached to the lower ends of the two vertical cords 14b and 14b in order to prevent the lower ends from coming off between the gear portion 32c and the protruding wall portion 30b.
[0017]
When the exposed length of the ladder cord 14 is finely adjusted to adjust the height of the bottom rail 24, that is, the height of the blind, the adjustment drum 32 on the lower surface side of the bottom rail 24 shown in FIG. When an end of a driver or a coin is inserted into the adjustment groove 32d and the adjustment drum 32 is rotated in an appropriate direction, the gear portion 32c of the adjustment drum 32 is connected to the protruding wall portion 30b. The gear portion 32c moves each vertical cord 14b of the ladder cord 14 while maintaining the sandwiching of the vertical cord 14b. For example, as shown in FIG. 5A, when the adjusting drum 32 is rotated in a direction in which the two vertical cords 14b and 14b are fed into the bottom rail 24, the height of the bottom rail 24 is high. In other words, the length of the blind is shortened. On the contrary, as shown in FIG. 5B, when the adjusting drum 32 is rotated in the direction in which the two vertical cords 14b and 14b are fed out of the bottom rail 24, the height of the bottom rail 24 is increased. Low, in other words, the length of the blind is increased. Thus, the height dimension of the blind can be adjusted. Thus, fine adjustment can be performed by appropriately rotating the adjustment drum 32 and adjusting the amount of rotation.
[0018]
In this embodiment, in order to adjust the height of the blind, it is not necessary to remove the tape holder 30 from the bottom rail 24, and it is only necessary to rotate the adjustment drum 32. Therefore, the adjustment can be easily performed.
[0019]
【The invention's effect】
As described above, according to the present invention, the adjustment drum is rotated, and the ladder cord exposed to the outside is drawn into the holder, or the adjustment drum is rotated in the reverse direction so that the ladder cord is removed from the holder. The height of the blinds can be easily adjusted simply by sending them out. There is no need to remove the holder from the bottom rail, and fine adjustment of the blind height dimension can be easily performed by adjusting the rotation direction and rotation amount of the adjustment drum.
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing an example of a blind according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of the present invention.
FIG. 3 is a perspective view of a holder and an adjustment drum of the present invention.
FIG. 4 is a bottom view of the main part of the present invention.
FIG. 5 is a diagram illustrating the operation of the present invention.
FIGS. 6A and 6B are partial cross-sectional views showing an operation when connecting a conventional ladder cord to a bottom rail. FIGS.
[Explanation of symbols]
10 Blind 12 Head box 14 Ladder cord 14a Middle cord 14b Vertical cord 16 Slat 17 Ladder cord support device 24 Bottom rail 30 Tape holder (holder)
30b1 Projection wall (receiving part)
30b2 Projection wall (guide part)
32 Adjustment drum 32c Gear part

Claims (2)

A ladder cord support device in which a large number of slats (16) are supported in an aligned state by a ladder cord (14) suspended from a head box (12), and an upper end of the ladder cord (14) is provided in the head box (12). In the blind connected to the bottom rail (24) connected to (17) and the bottom rail (24) arranged below the slat (16) row,
A holder (30) is attached to the bottom rail (24), and an adjustment drum (32) is pivotally supported on the holder (30) so as to be rotatable with respect to the holder (30). The gear portion (32c) is formed, and the holder (30) is formed with a receiving portion (30b1) for sandwiching the ladder cord (14) between the gear portion (32c) and the gear portion (32c). The ladder cord (14) is connected to the bottom rail (24) by clamping with the receiving portion (30b1) ,
By rotating by operating the adjusting drum (32), the site to be clamped in the ladder cord (14) is moved, ladder cord (14) is fed to the bottom rail (24) or in the bottom rail (24 ) Blinds characterized in that the height of the bottom rail (24) is changed by being sent out .   In the vicinity of the holder (30), the ladder cord (14) in the vicinity of the portion clamped between the gear portion (32c) and the receiving portion (30b1) is prevented from being wound around the adjustment drum (32). The blind according to claim 1, wherein a guiding portion (30b2) for guiding separation of the ladder cord (14) from the adjusting drum (32) is formed.

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