JP2693660B2 - Obstacle detection stop device for lighting control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION lighting this invention to lift the lighting adjustment member which is suspended supporting from the head box lift cord
It relates to an adjusting device .

[0002]

2. Description of the Related Art Curtain material is suspended from a head box that is fixed to the upper frame of a window as one type of comb-up curtain, and a plurality of hoisting and lowering shafts are rotatably supported in the head box. The cord is hung down, and the lower end of the lifting cord is attached to the lower part of the curtain.For example, by operating the operation cord hung from one end of the head box, the winding shaft is rotated and moved in the axial direction to move the lifting cord. There is one in which the curtain material is raised and lowered by winding or rewinding in a spiral shape.

[0003]

In the above-mentioned tuck-up curtain, since the lifting cord is always kept in a tensioned state due to the weight of the bottom rail attached to the lower end of the curtain material and the weight of the curtain material, the winding shaft. It is possible to spirally wind or rewind the elevating cord by rotating the shaft while moving it in the axial direction.

However, when the curtain material is lowered, if the bottom rail abuts on an obstacle and cannot be lowered, and the winding shaft is further rotated in the elevating cord rewinding direction, the tension state of the elevating cord is reduced. The lifting cord that is loose and loose around the winding shaft is stuck. Then, when the winding shaft is again rotated in the pulling direction of the curtain material in such a state, the lifting cord stagnant around the winding shaft is not wound in a spiral shape, and the lifting cord is lifted during the subsequent descent operation of the curtain material. It may not be possible to rewind normally.

Therefore, when the bottom rail comes in contact with an obstacle and the tension state of the lifting cord is loosened, an obstacle detection stop device for mechanically preventing the rotation of the winding shaft is required.
Since the take-up shaft moves in the axial direction while rotating when the curtain material is raised and lowered, an obstacle detection stopping device having such a simple structure for the take-up shaft having such a structure has not been proposed yet.

An object of the present invention is to provide a lighting control device.
Accordingly, it is an object of the present invention to provide an obstacle detection stop device having a simple configuration, which automatically prevents the rewinding of the elevating cord when the lighting adjustment member comes into contact with an obstacle and cannot descend.

[0007]

In order to achieve the above object, the present invention suspends and supports a lighting control member from a head box, and suspends a plurality of lifting cords from a winding shaft in the head box. Connected to the lower end of the lighting adjustment member,
A lighting adjustment device that moves the winding shaft in an axial direction while rotating the winding shaft via an operating device to wind or rewind the lifting cord in a spiral shape to move the lighting adjustment member up and down.
In location, on the outer peripheral surface of the winding shaft on the inner side than the outer peripheral surface
A recess formed in a recess is provided in the axial direction of the take- up shaft, and a bearing member that rotatably supports the take-up shaft in the head box is engaged with the recess to prevent the take-up shaft from rotating. The locking member is movably supported between an operating position in which the recess is engaged and a non-operating position in which the locking member is not engaged, and the bearing member biases the locking member toward the operating position. Biasing means is provided, and the locking member is positioned at the non-operating position against the biasing force of the biasing means in a state where the weight of the lighting adjustment member acts on the lifting cord on the locking member. The same lifting cord is inserted so that

[0008]

By the above means, when the winding shaft is rotated in the rewinding direction of the elevating cord with the tension of the elevating cord being relaxed, the locking member engages with the groove of the winding shaft to wind the winding shaft. Is prevented from rotating. Also, is the concave line provided on the winding shaft?
The part provided with the engaging member for engaging
There is no need to newly arrange, and the structure is simple and
It is possible to reduce the number of parts. Therefore, manufacturing
Cost can be reduced. In addition, the groove is
Is it formed so as to be recessed inward from the outer peripheral surface?
The diameter of the take-up shaft is increased due to the part where the engaging member engages.
Minimize the head box that houses the take-up shaft
It is possible to do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a tuck-up curtain 1 has a head box 2 and a curtain material 3 as a lighting control member having an upper end attached to the front surface thereof. It is attached. In the head box 2, pipe-shaped winding shafts 4 are rotatably supported by bearing members 8 arranged at equal intervals in the head box 2, and a plurality of winding shafts 4 are inserted from the winding shafts 4 through the bearing members 8. The lifting cord 5 of the book is hanging. The lower end of the elevating cord 5 is attached to the lower part of the curtain fabric 3 via a cord stopper 6, and the middle part of the elevating cord 5 is attached to the curtain fabric 3 at the hanging position of the elevating cord 5 at equal intervals. Has been inserted into. A bottom rail 9 is supported by a bag-shaped portion formed at the lower end of the curtain fabric 3.

An upper end of the lifting cord 5 has a hook 20 described later.
The hook 20 is attached to the winding shaft 4, and the elevating cord 5 is hung from the hook 20 below the head box 2 via the winding shaft 4 and the bearing member 8.
Then, when the winding shaft 4 is rotationally driven in the pulling direction of the curtain material 3 by a known manual operation device (not shown), the winding shaft 4 is moved in the direction of arrow C in FIG. 5 is spirally wound around the winding shaft 4, and when the winding shaft 4 is rotationally driven in the descending direction of the curtain material 3, the winding shaft 4 is rotated and moved in the direction opposite to the above direction. The lifting cord 5 is rewound from the winding shaft 4.

The attachment structure of the hook 20 and the winding shaft 4 will be described with reference to FIGS. 2 and 3. As shown in FIG. 2, two recesses 19 are formed on the outer peripheral surface of the pipe-shaped winding shaft 4. Formed in the axial direction, each groove 19 is formed in a square groove shape in cross section, and is formed in line symmetry with respect to the center of the winding shaft 4. The hook 20 is formed of, for example, a synthetic resin having elasticity in a semi-arcuate shape, the inner diameter of the arc portion 21 is formed to be substantially the same as the outer diameter of the winding shaft 4, and the protruding portions 22 facing each other are provided at both ends of the arc portion 21. Is formed, and a ridge 23 is formed at the intermediate portion of the inner peripheral surface of the arc portion 21. Also, the arc portion 2
An engaging hole 24 for attaching the upper end of the elevating cord 5 is formed in the middle portion of the outer peripheral surface of the device 1.

Then, as shown in FIG. 3, the upper end of the elevating cord 5 is wound by connecting the upper end of the elevating cord 5 to the locking hole 24 of the hook 20 and fitting the protrusion 22 into the recess 19 of the winding shaft 4. The hook 20 is supported by the take-up shaft 4, and the hook 20 is fitted to the take-up shaft 4 so that the hook 20 is located near the bearing member 8 with the curtain material 3 being lowered to the lower limit. When the dough 3 is rotated in the pulling direction, the hook 20
Is moved in the direction of arrow C shown in FIG. 1 so as to move away from the bearing member 8 while rotating with the winding shaft 4. In addition, the hook 20 has a protrusion 22 on the winding shaft 4.
When it is fitted into the recessed ridge 19, the protrusion 22 and the ridge 23 are crimped to the winding shaft 4 at three places, and the winding shaft 4 of the hook 20 is
It is designed to prevent lateral slippage with respect to.

As shown in FIGS. 4 and 5, the bearing member 8 rotatably supports the winding shaft 4 on an arcuate bearing surface 25 having an open upper portion. A locking member 26 is supported on the bottom surface of the bearing member 8 on the side of the bearing surface 25 so as to be movable in the radial direction of the winding shaft 4.
A locking piece 27 protruding upward is formed on one side. The locking member 26 is on the bottom surface in a range from a state in which the locking piece 27 is located on one side on the bottom surface of the bearing member 8 as shown in FIG. 4 to a state in which it is centrally located on the bottom surface as shown in FIG. In the state in which the locking piece 27 is movably supported at one side (non-operating position) on the bottom surface, the locking piece 27 does not engage with the groove 19 of the winding shaft 4, and the locking piece 27 is on the bottom surface. When it becomes possible to move to the upper center, the curtain material 3 of the winding shaft 4
Based on the downward rotation, that is, the rotation in the direction of arrow A shown in FIG. 4, the locking piece 27 engages with the recess 19 and moves to the center (operating position) on the bottom surface, and further movement is restricted. By doing so, the rotation of the winding shaft 4 is prevented.

An insertion hole 28 for inserting the lifting cord 5 is formed on the other side of the locking member 26, and the locking piece 27 is located on one side on the bottom surface of the bearing member 8 as shown in FIG. In the state, the insertion hole 28 communicates with the insertion hole 29 formed on the bottom side of the bearing member 8. And
The lifting cord 5 wound around the winding shaft 4 has both insertion holes 2
8 and 29, the bearing member 8 and the head box 2 are guided downward, and when the lifting cord 5 is strained by the weight of the bottom rail 9 and the curtain material 3, both lifting holes 28 and 29 are inserted by the lifting cord 5. It is designed to maintain communication.

A recess 3 provided on the bottom surface of the bearing member 8.
0 is provided with a coil spring 31 as a biasing means, one end of the coil spring 31 abuts on the side surface of the recess 30, and the other end abuts on the locking member 26. Therefore, the locking member 26 is biased by the biasing force of the coil spring 31 so that the locking piece 27 moves toward the center on the bottom surface.

In the lifting / lowering device for the comb-up curtain constructed as described above, if the winding shaft 4 is rotated in the winding direction of the lifting / lowering cord 5 via the manual operation device, the lifting / lowering cord 5 is wound up. The curtain material 3 is pulled up by being spirally wound around the shaft 4.

On the other hand, when the winding shaft 4 is rotated in the rewinding direction of the elevating cord 5, the elevating cord 5 is rewound from the winding shaft 4 and the curtain material 3 is lowered. At this time, when the bottom rail 9 or the curtain material 3 comes into contact with an obstacle to loosen the tension state of the elevating cord 5, the biasing force of the coil spring 31 causes the locking member 26 to move in the direction of arrow B in FIG. It is ready to move to. Then, as the take-up shaft 4 rotates in the rewinding direction, the recess 19 of the take-up shaft 4 and the locking piece 27 of the locking member 26 are engaged with each other, and the engaging shaft 27 rotates. When the stop member 26 moves in the direction of the arrow B and the locking member 26 is moved to the position shown in FIG. 5, the locking member 26 is prevented from moving further, and thus the winding shaft 4 is prevented from moving further. Rotation is blocked. Therefore, the rewinding of the lifting cord 5 in a relaxed state is prevented.

As described above, in this lifting device, the winding shaft 4
The raising and lowering cord 5 is provided by the obstacle detection stop device including the recessed strip 19, the locking member 26 and the coil spring 31.
Since it is possible to prevent the rewinding of the lifting cord 5 when the tension of the lifting cord 5 is loose, the winding shaft 4 of the lifting cord 5 can be prevented.
It is possible to surely prevent the occurrence of a problem at the time of raising / lowering operation due to the disorder of the winding state on the winding shaft 4 and
The obstacle detection stopping device can be realized with an extremely simple structure, while the lifting cord 5 is spirally wound around the winding shaft 4 by moving the rotating shaft in the axial direction while rotating.

[0019]

As described in detail above , according to the present invention,
The structure can be simplified and the number of parts is small.
Manufacturing cost can be reduced.
it can. Also, downsize the head box that houses the take-up shaft.
can do.

[Brief description of the drawings]

FIG. 1 is a front view showing a tuck-up curtain according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a winding shaft and a hook according to an embodiment.

FIG. 3 is a cross-sectional view showing a state in which a hook is fitted on the winding shaft of the embodiment.

FIG. 4 is a sectional view showing a bearing member according to an embodiment.

FIG. 5 is a sectional view showing a bearing member according to an embodiment.

[Explanation of symbols]

 2 Headbox 3 Lighting control member 4 Winding shaft 5 Elevating cord 8 Bearing member 19 Recessed line 26 Locking member 31 Biasing means (coil spring)

Claims (1)

(57) [Claims] 1. A head box (2) suspends and supports a lighting control member (3), and a plurality of lifting cords (5) are suspended from a winding shaft (4) in the head box (2). The lifting cord (5) is spirally wound or wound by being connected to the lower end of the lighting adjusting member (3) and moving the winding shaft (4) in an axial direction while rotating the winding shaft (4) through an operating device. Lighting control for raising and lowering the lighting control member (3) by returning
In the knot device , the outer circumference of the winding shaft (4) should be recessed inward from the outer circumference.
A bearing member (8) rotatably supporting the take-up shaft (4) in the head box (2) by providing a recessed line (19) formed in this way in the axial direction of the take- up shaft (4). ) Is the groove (19)
Locking member (2
6) is movably supported between an operating position in which it engages with the groove (19) and a non-operating position in which it does not engage, and the locking member (26) is attached to the bearing member (8). A biasing means (31) for biasing toward the position is provided, and the locking member (26) is locked when the weight of the lighting adjustment member (3) acts on the lifting cord (5). Member (2
The obstacle detection stopping device of the lighting adjustment device , wherein the lifting cord (5) is inserted so as to position 6) in the non-operating position against the biasing force of the biasing means (31).