JP2902251B2 - Hoisting blinds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting blind which suspends and supports a slat from a hoisting cylinder and winds or rewinds the slat to or from the hoisting cylinder to raise and lower the slat.

[0002]

2. Description of the Related Art Conventionally, there are the following types of hoisting blinds. That is, JP-A-53-833
In the hoist type blind disclosed in Japanese Patent Publication No. 39, a supporting tape is suspended and supported by a hoisting cylinder, and a plurality of slats are suspended and supported by the supporting tape.

In such a hoisting blind, the angle of the slat is adjusted via the support tape by operating the operating cord to slightly rotate the hoisting cylinder. Further, by further rotating the hoisting cylinder, the support tape and the slats are wound by the hoisting cylinder, the slats are lifted, and the slats are lowered by rewinding the support tape and the slats from the hoisting cylinder.

[0004] The following types of roll blinds have been put to practical use as lighting control means in the same manner as the roll-up type blinds. That is, a screen such as cloth is hung and supported from a winding cylinder rotatably supported by a frame attached to a window frame or the like, and a ball chain is mounted on a pulley provided on one side of the winding cylinder. ing. When the hoisting cylinder is rotated based on the operation of the ball chain, the screen moves up and down.

[0005]

In the hoisting blind as described above, when the slat is wound on the hoisting cylinder by operating the operating cord, it is necessary to operate the operating cord in the same direction after winding the slat to the upper limit. , And the bottom rail is wound up by the winding tube. Therefore, there is a problem that noise is generated or a failure is caused.

On the other hand, when lowering the slat by operating the operation cord, the operator does not clearly know the lowermost position of the slat. Therefore, even after the slat is lowered to the lowermost limit, there is a problem that the slat is wound up in the opposite direction by operating the operation cord in the same direction.

In the above-mentioned roll blind, when the screen is wound up, after the screen is wound up to the upper limit, the ball chain is further operated in the same direction.
A weight bar attached to the lower end of the screen is wound between the hoisting cylinder and the frame. Therefore, it may cause noise or hinder subsequent operations.

On the other hand, when lowering the screen, the operator does not clearly know the lowermost position of the screen. Therefore, there is a problem that even after the screen is lowered to the lowermost limit, the ball chain is further operated in the same direction to wind the screen around the winding cylinder in the opposite direction.

Therefore, in the above-mentioned roll blind, a stopper is attached to the ball chain to prevent the weight bar from being entangled and the screen from being reversely wrapped. That is, when the screen is raised or lowered to the uppermost limit or the lowermost limit, the stopper is brought into contact with a pulley case arranged around the pulley to prevent further operation of the ball chain in the same direction. It is configured.

However, in the above configuration, it is necessary to attach two stoppers to the ball chain. In addition, since the stopper and the pulley case are both formed of synthetic resin, when the stopper collides with the pulley case, the stopper or the pulley case may be cracked or the stopper may fall off the ball chain. There is a point.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent reverse winding of a slat or entanglement of a bottom rail in a horizontal blind in which a slat is wound up or down by a hoisting cylinder and a slat angle adjusting operation and a raising / lowering operation are enabled. Is to do.

[0012]

In order to achieve the above object, according to the present invention, in the first aspect, two doughs are rotatably supported on a supporting frame from a hoisting cylinder. Along the upper and lower sides of the fabric , a plurality of slats are supported.
And the slats can be angle-adjusted through the cloth by rotating the hoisting cylinder by operating means provided on the support frame, and the dough and the slats are In the hoisting blind that can be wound up, the fabric and slats are wound up.
Was wound up to a position where it could be taken up by the winding cylinder
How to wind up the slat of the hoisting cylinder by engaging with the bottom rail
The stopper device for restricting the rotation of
Provided within.

[0013] Further, in claim 2, there is described in claim 1.
In the above-mentioned rolling blind, the cloth and the slat
Is rewinded to the lowermost limit, the stopper device and
Engagement member that engages to restrict rotation of the hoisting cylinder in the slat descending direction
A stop piece was provided on the outer peripheral surface of the hoisting cylinder.

[0014]

According to the first aspect of the present invention, the bottom rail is wound.
When it is wound up to the position where it can be
The upper rail in the same direction
Further rotation into is regulated. In addition, the stopper
Since the device is installed in the support frame, the stopper
When the device and the bottom rail engage, the stopper device
It can be configured to abut the support frame. This place
The stopper device and the bottom lever
Can be prevented from being disengaged from the
You. As a result, the bottom rail is reliably prevented from getting caught.
I can.

According to the second aspect of the present invention, in addition to the above operation,
After the dough and slats have been rewound to the lowest limit,
If the hoisting cylinder is to be further rotated in the same direction,
Of the upper cylinder in the same direction
Further rotation into is regulated. Also, one stop
The two effects are obtained by the
Configuration can be simplified compared to the case where a
Wear.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the hoist type blind shown in FIGS. 5 and 6, a supporting frame 1 is supported and fixed to a window frame 3 or the like via a mounting bracket 2, and a hoisting cylinder 4 is rotatably supported by the supporting frame 1. ing. A pulley 5 is attached to one side of the hoisting cylinder 4, and an endless ball chain 6 is mounted on the pulley 5. By operating the ball chain 6, the hoisting cylinder 4 can be driven to rotate in the forward and reverse directions. The driving device for driving the hoisting cylinder 4 via the pulley 5 by operating the ball chain 6 has the same configuration as a known screen raising / lowering device of a roll blind.

As shown in FIG. 1, the hoisting cylinder 4 is formed in a pentagonal cross-sectional shape, and one of the pentagons is positioned upward. 4 two thin fabrics 7a, 7b such as lace ground over the entire length of 4
The upper edge of is attached. That is, the dough 7a, 7b
The upper end of the holding piece 8 protrudes in a hook shape on the surface of the winding cylinder 4.
And a holding member 9 fitted on the surface of the upper cylinder 4.

The mounting position of the fabrics 7a and 7b on the winding cylinder 4 is determined by rotating the
When hoisting a and 7b, the bottom rail 10 is set to be tilted in the vertical direction.

A bottom rail 10 is suspended from the lower ends of the fabrics 7a and 7b. The bottom rail 10 has a main body 22 curved so that the lower surface swells downward,
It is formed in a cylindrical shape from a fitting member 23 fitted to the main body 22. When the fitting member 23 is fitted to the main body 22, the cloths 7a and 7b are sandwiched between the main body 22 and the fitting member 23.

The main body 22 extends rearward from the rear edge of the cylindrical portion of the bottom rail 10 to form a hooking piece 10a. The slats 11 are connected between the cloths 7a and 7b so that the cloths 7a and 7b are connected at regular intervals in the vertical direction.
Are arranged. The slat 11 is made of a thick flexible cloth and has a front-rear width larger than the distance between the cloths 7a and 7b, and both front and rear edges are welded to the cloths 7a and 7b.

As shown in FIG. 1, a locking piece 12 is formed on the hoisting cylinder 4 by extending the upper front oblique side 4a in a state where the bottom rail 10 is suspended and supported in the horizontal direction. ing.

In the support frame 1, a stopper device 13 is provided on a rear side surface thereof to prevent the hoisting cylinder 4 from rotating more than necessary. That is, as shown in FIG. 4, a pair of vertically opposed mounting pieces 14 are formed on the rear side surface in the support frame 1, and a bearing member 15 is supported between the mounting pieces 14.

A support shaft 16 is supported by the bearing member 15, and a base end of a stopper arm 17 is rotatably supported by the support shaft 16. A torsion coil spring 18 is wound around the support shaft 16, one end 19 a of the torsion coil spring 18 abuts the support frame 1, and the other end 19 b abuts the stopper arm 17. I have.

Accordingly, the stopper arm 17 is always urged downward by the urging force of the torsion coil spring 18 with the support frame 1 as a fulcrum, and as shown in FIG. As shown in FIG. 2, the cloth 7a wound around the winding cylinder 4 is pressed against the cloth 7a.

The distal end of the stopper arm 17 is formed in a substantially wedge shape, and projects upward and engages with the engaging piece 12 of the hoisting cylinder 4 in a vertically inclined state. Hanging piece 1 of the bottom rail 10 to be wound up
0a is provided with a locking recess 21.

When the hoisting blind constructed as described above is installed inside a window or the like, the slats 11 are supported horizontally in the state shown in FIG. 1, so that the two cloths 7a and 7b are separated. The transmitted soft light is collected.

From this state, when the hoisting cylinder 4 is rotated in the slat winding direction by operating the ball chain 6, first, the cloth 7a is pulled up by the hoisting cylinder 4, and the slat 11 is tilted. Then, when each slat 11 is tilted until it is substantially vertical, light is blocked by the slat 11.

When the hoisting cylinder 4 is further rotated from this state, the slats 11 together with the fabrics 7a and 7b
It is wound up. At this time, as shown in FIG.
The cloth 7a, 7b and the slat 11 are sequentially wound up, and the diameter of the winding increases, so that the stopper arm 17 is gradually pushed upward.

Next, when the bottom rail 10 is about to be caught between the hoisting cylinder 4 and the support frame 1, the engaging piece 10a of the bottom rail 10 moves upward while pushing the stopper arm 17 upward. Then, as shown in FIG.
, So that the bottom rail 10 is prevented from being entangled and the hoisting cylinder 4 is prevented from further rotating in the same direction.

On the other hand, when the hoisting cylinder 4 is rotated in the slat descending direction by operating the ball chain 6, the doughs 7a, 7b
And the slats 11 are sequentially rewound to form the bottom rail 1
0 is decreased. When the bottom rail 10 is lowered to the lowermost limit as shown in FIG.
Is suspended in a horizontal direction.

In this state, the dough 7a, 7
Since b is not wound up and the locking piece 12 is exposed, the locking projection 20 of the stopper arm 17 engages with the locking piece 12.

Therefore, when the bottom rail 10 is lowered to the lowermost limit, the locking projections 20 are engaged with the locking pieces 12 to prevent further rotation of the winding cylinder 4 in the same direction. The reverse winding of the doughs 7a and 7b around the hoisting cylinder 4 is prevented.

As described above, in this winding blind,
Bottom rail 10 between support frame 1 and hoisting cylinder 4
And the reverse winding of the doughs 7a and 7b around the hoisting cylinder 4 can be prevented beforehand. Then, the common stopper arm 17 can prevent the winding of the bottom rail 10 and the reverse winding of the cloths 7a and 7b.

[0034]

As described in detail above , according to the present invention,
The bottom rail can be prevented from getting caught in advance
When the stopper device and the bottom rail are engaged
So that the stopper device contacts the support frame.
The bottom rail can be reliably prevented
it can. In particular, according to the second aspect of the present invention, with a simple configuration,
It is possible to prevent reverse winding of the fabric and slats.
Wear.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a hoist type blind of one embodiment.

FIG. 2 is a longitudinal sectional view showing a state where a slat is pulled up.

FIG. 3 is a longitudinal sectional view showing a state in which a slat is raised to an upper limit.

FIG. 4 is a longitudinal sectional view showing a stopper device.

FIG. 5 is a front view showing a hoisting blind of one embodiment.

FIG. 6 is a side view showing a hoisting blind of one embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support frame 4 Hoisting cylinder 7a, 7b Fabric 10 Bottom rail 11 Slat 12 Locking piece 13 Stopper device

Claims (2)

(57) [Claims] 1. A fabric (7a, 7b) suspended from a hoisting cylinder (4) rotatably supported by a support frame (1) along the hoisting cylinder (4). Both fabrics (7
a, 7b), a plurality of slats (11) are supported up and down, and a bottom lay is provided at the lower end of both fabrics (7a, 7b)
Of the slat (11) via the cloth (7a, 7b) by rotating and driving the hoisting cylinder (4) by operating means provided on the support frame (1). ) Can be adjusted in angle, and the dough (7a,
7b) and a slat (11) in a hoisting blind capable of being wound around a hoisting cylinder (4), in which the cloth (7a, 7b) and the slat (11) are wound up.
In the unwinding operation, up to the position where it can be taken up by the winding cylinder (4).
Engage with the rolled up bottom rail (10) and roll up
A strut for restricting rotation of the cylinder (4) in the slat winding direction
A hopper device (13) is provided in the support frame (1).
Hoisting blind, characterized in that the. 2. The fabric (7a, 7b) and a slat
When (11) is rewound to the lowermost limit, the stopper
-The slats of the hoisting cylinder (4) are lowered by engaging with the device (13).
The locking piece (12) for restricting the rotation in the
(4) The outer peripheral surface is provided on the outer peripheral surface.
Roll-up blinds.