JP3273007B2 - Tuck up curtain - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for raising and lowering a curtain.

[0002]

2. Description of the Related Art Conventionally, as one type of a lift-up curtain, a curtain fabric is suspended and supported from a head box attached to a window frame or the like, and a ball chain hanging from one side of the head box is operated. In some cases, a curtain fabric can be raised and lowered by driving a lifting and lowering cord winding device provided in a head box to wind up or lower the lifting and lowering cord.

In such a lift-up curtain, a locking groove for locking the ball chain is provided in an operation section case for accommodating a pulley on which the ball chain is mounted in order to prevent the curtain cloth from falling by its own weight. Have been.
When the ball chain is not operated, the ball chain is hooked into the locking groove to prevent the pulley from rotating in the curtain fabric descending direction, thereby preventing the curtain fabric from falling by its own weight. I have.

[0004]

In the lift-up curtain provided with the above-described weight drop prevention device, the ball chain is detached from the locking groove when the curtain fabric is lifted and lowered, and the ball chain is moved to the operating part case. Is pulled out in the direction of raising the curtain fabric, or is pulled into the operation unit case.

However, since the locking groove is formed at a position where the ball chain hangs down in order to facilitate the operation of locking the ball chain, the ball chain is moved by the weight of the curtain cloth so that the ball chain is operated. In order to lower the curtain fabric by pulling it inside, it is necessary to hold the ball chain pulled obliquely to the front side so that the ball chain does not engage with the locking groove, and the operation is troublesome.

Further, when the curtain fabric is pulled out, if the ball chain is pulled out directly below, the ball chain is pulled out while abutting on the locking groove. Therefore, there is a problem that noise is easily generated due to collision between the ball of the ball chain and the locking groove.

An object of the present invention is to provide a lift-up curtain provided with a self-weight drop prevention device which can improve the operability at the time of raising / lowering operation of curtain fabric and can prevent noise from occurring.

[0008]

According to a first aspect of the present invention, a drive shaft is rotatably supported in a head box, and an operation device for rotating and driving the drive shaft is provided at one end of the head box. In the lift-up curtain that drives the drive shaft to rotate to raise and lower the curtain fabric based on the operation of the operation device, the operating device allows rotation of the drive shaft by operation of the operating device, and the weight of the curtain fabric A stopper for preventing rotation of the drive shaft is provided between the drive shaft and a fitting portion of the operating device fitted into the head box, and the stopper is provided in the front-rear direction with respect to the fitting portion.
And the case of the stopper is cylindrical.
Forming a plurality of projections on the case;
A concave portion for engaging with the convex portion is provided on an inner peripheral surface of the portion;
Parts engage with the convex part of the case replaced in the front-back direction
It is provided in the position where it does .

According to a second aspect of the present invention, the stopper includes a case that is non-rotatably fitted into the insertion portion, a drum that is rotatably supported in the case, and that rotates together with the drive shaft; And a clutch groove interposed between the drum and a drum. The inner peripheral surface of the case is provided with a slide groove for supporting the clutch ball so as to be movable only in the rotation axis direction of the drum. The surface guides the clutch ball along the outer peripheral surface based on the rotation of the drum, and engages with the clutch ball when the drum is rotated based on the weight of the curtain cloth. A guide groove is provided to prevent the rotation of.

According to a third aspect of the present invention, the guide groove includes a lifting groove that enables the clutch ball to relatively rotate on the outer peripheral surface of the drum when the curtain cloth is lifted by the operating device. At the time of the curtain fabric pull-down operation, a pull-down groove allowing the clutch ball to relatively orbit on the outer peripheral surface of the drum, and the drum was rotated in the curtain fabric pull-down direction by the weight of the curtain fabric following the lifting operation. When a stop groove that engages with the clutch ball to prevent rotation of the drum, and when the drum is rotated in a direction in which the curtain cloth is pulled from a state in which the clutch ball is engaged with the stop groove, a second return groove for guiding the clutch ball to the lowered groove, the clutch ball the draw From the state located below the groove, when the drum is rotated in the pulling direction of the curtain fabric,
A first return groove for guiding the clutch ball to the lifting groove.

According to a fourth aspect of the present invention, the stopper can be replaced in the front-rear direction with respect to the fitting portion.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the lift-up curtain shown in FIG. 1, a curtain fabric 2 is suspended from a head box 1 fixed to an upper frame of a window or the like, and a weight bar 3 is provided at a lower end of the curtain fabric 2. Hanging supported.

A plurality of lifting / lowering cords 4 are suspended from the head box 1, and the lower end of the lifting / lowering cord 4 is attached to the lower end of the curtain fabric 2 via a mounting member 5.

The upper end of the lifting cord 4 is supported by a lifting cord winding device 6 provided in the head box 1. Then, the ball chain 7 hanging down from one end of the head box 1 is operated, and the elevating cord winding device 6 is operated.
, The lifting cord 4 is wound up,
Or rewind. Accordingly, the curtain fabric 2 is moved up and down by operating the ball chain 7.

At one end of the head box 1, an operating device 8 for driving the elevating cord winding device 6 by operating the ball chain 7 is attached. The specific configuration of the operating device 8 will be described. As shown in FIG. 2, a pulley 10 formed of a synthetic resin is rotatably supported on a case 9 of the operating device 8, and the pulley 10 is mounted on the ball chain. 7 is mounted.

An output shaft 11 protruding into the head box 1 is integrally formed at the center of the pulley 10, and a hexagonal rod-shaped drive shaft 1 is provided at the tip of the output shaft 11.
2 are fitted.

Accordingly, when the pulley 10 is rotated, the drive shaft 12 is rotated, and based on the rotation of the drive shaft 12,
The elevating cord 4 is wound or unwound by the elevating cord winding device 6.

As shown in FIG. 3, the case 9 is formed with a substantially square tube-shaped insertion portion 13, and the insertion portion 13 is inserted into an end of the head box 1. A stopper 14 that operates as a device for preventing the curtain fabric 2 from falling by its own weight is fitted into the fitting portion 13. The case 15 of the stopper 14 is formed in a substantially cylindrical shape, and a convex portion 16 is formed on an outer peripheral surface thereof at a position opposed to each other with the center therebetween.

A stopper 14 is provided on the inner surface of the fitting portion 13.
A curved surface along the outer peripheral surface of the case 15 is formed,
3 are provided on the inner surfaces of the four corners.
A concave portion 17 is formed for positioning the shaft so that it cannot rotate.

Accordingly, as shown in FIG. 5, the stopper 14 is non-rotatably supported in the fitting portion 13 with the convex portion 16 engaged with the concave portion 17 in the fitting portion 13. Also,
It is also possible to insert the stopper 14 into the insertion portion 13 with its front-rear direction being replaced.

A drum 18 is rotatably supported in the case 15 of the stopper 14, and the output shaft 11 is inserted into the center of the drum 18 so as not to rotate relatively. A plurality of split grooves are formed at the tip of the output shaft 11, and a spring piece 19 is formed between each split groove. The spring piece 1
A barb 20 is formed at the tip of the output shaft 9, and the stopper 14 fitted to the output shaft 11 allows the output shaft 11
Is prevented from coming off. If the spring piece 19 is bent inward, the stopper 14 can be removed from the output shaft 11.

A guide groove 21 having a semicircular cross section is formed on the outer peripheral surface of the drum 18 so as to orbit the outer peripheral surface.
5, a slide groove 22 having a semicircular cross section is formed in the center axis direction of the stopper 14.

A clutch ball 23 made of a steel ball is provided between the guide groove 21 and the slide groove 22. Accordingly, when the drum 18 is rotated, the clutch ball 23 moves along the slide groove 22 while relatively rotating on the outer peripheral surface of the drum 18 along the guide groove 21.

The structure of the guide groove 21 will be described with reference to the development shown in FIG. In FIG. 4, when the drum 18 is rotated in the direction in which the curtain fabric 2 is pulled up, the clutch ball 23 relatively moves on the guide groove 21 in the direction of arrow A. When the drum 18 is rotated in the direction in which the curtain fabric 2 is pulled down, the clutch ball 23 relatively moves on the guide groove 21 in the direction of arrow B.

A pull-down groove 24 is formed on one side of the outer peripheral surface of the drum 18, and a pull-up groove 25 is formed on the other side. A first return groove 26 branching in the direction of arrow A communicates with the pull-down groove 24, and the first return groove 26 joins the upward groove 25 in the direction of arrow A.

A stop groove 27 branching in the direction of arrow B communicates with the lifting groove 25, and the stop groove 27 reaches a dead end in the direction of arrow B at a locking portion 28. Through a second return groove 29 extending in the direction, it merges with the pull-down groove 24.

In the stopper 14 configured as described above,
When the raising operation of the curtain fabric 2 is performed, the clutch ball 23 moves in the arrow A direction in the raising groove 25.
When the ball chain 7 is released after the curtain fabric 2 is pulled up to a desired position, the lifting cord 4 is rewound by the weight of the curtain fabric 2, and the drive shaft 12 and the output shaft 11
When the clutch ball 23 moves in the direction indicated by the arrow B in the pulling groove 24, the clutch ball 23 engages with the locking portion 28, and the drum 18 further rotates in the same direction. Is blocked. Therefore, in this state, the descent of the curtain fabric 2 under its own weight is prevented.

When the curtain fabric 2 is to be lowered from this state, the ball chain is operated and the curtain fabric 2 is slightly pulled up. Through the lowering groove 24. Then, the clutch ball 23 can orbit inside the pull-down groove 24, so that the curtain fabric 2 can be lowered by its own weight.

When the curtain fabric 2 is further pulled up from the state in which the clutch ball 23 is engaged with the locking portion 28, the ball chain 7 is operated in the direction in which the curtain fabric 2 is pulled up. Is guided from the locking portion 28 through the second return groove 29 into the pull-down groove 24, and further through the first return groove 26, into the pull-up groove 25.
Will be guided inside. Therefore, the curtain fabric 2 can be pulled up by the ball chain 7.

The operating device 8 shown in FIGS. 1 and 2 is attached to the left end of the head box 1 and used for left operation. The operating device 8 can also be used for right operation. .

That is, when the operating device 8 shown in FIG. 2 is detached from the left end of the head box 1 and is attached to the right end of the head box 1 as it is, the rotating direction of the drum 18 during the raising and lowering operation of the curtain fabric 2 is reversed. Therefore, the insertion section 1
When the stopper 14 is taken out of the stopper 3 and inserted into the fitting portion 13 with the front and rear of the stopper 14 interchanged as shown in FIG. 5, the raising / lowering operation of the curtain fabric 2 and the rotation direction of the drum 18 match.

The following effects can be obtained with the raised curtain configured as described above. (A) The stopper 14 built in the operating device 8 can prevent the curtain fabric 2 from falling by its own weight,
When the curtain fabric 2 is lowered, it is not necessary to hold the ball chain pulled obliquely downward on the front side. Therefore,
Operability at the time of the descent operation of the curtain fabric 2 can be improved. (B) The stopper 14 built in the operating device 8 can prevent the curtain fabric 2 from falling under its own weight, and the stopper 14 can be used to move the clutch ball 23 into the guide groove 21 of the drum 18 when the curtain fabric 2 is moved up and down. , No noise is generated. (C) The stopper 14 is inserted into the fitting portion 13 of the operating device 8
Since it is formed so as to be interchangeable in the front-rear direction, the operating device 8 can be used for either right operation or left operation.

[0033] The have been technical idea described in the above embodiment will be described in conjunction with the effects below. (1) before SL form a casing of the stopper to cylindrical, in the case to form a plurality of convex portions, a recess which engages with the protrusion formed on the inner peripheral surface of the inserting portion, the recess Are provided at positions respectively engaging with the convex portions of the case replaced in the front-rear direction. The case can be non-rotatably fitted to the fitting portion while replacing the case back and forth.

[0034]

As described above in detail, the present invention provides a lift-up curtain provided with a self-weight drop prevention device which can improve the operability in raising and lowering the curtain fabric and can prevent noise from occurring. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tuck-up curtain.

FIG. 2 is a cross-sectional view illustrating an operation device.

FIG. 3 is an exploded perspective view showing the operation device.

FIG. 4 is a development view showing a guide groove.

FIG. 5 is a cross-sectional view showing a mounting state of the operating device.

FIG. 6 is a cross-sectional view showing a mounting state of the operating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head box 2 Curtain cloth 8 Operating device 12 Drive shaft 13 Fitting part 14 Stopper

Claims (4)

(57) [Claims] An operation device for rotatably supporting a drive shaft in a head box, and an operation device for rotating and driving the drive shaft is provided at one end of the head box, and the drive shaft is operated based on an operation of the operation device. In the lift-up curtain for rotating and raising and lowering the curtain fabric, the operating device has a stopper that allows rotation of the drive shaft by operation of the operating device and prevents rotation of the drive shaft due to the weight of the curtain fabric. , provided between the inserting portion of the operating device to be fitted into the head box and the drive shaft, the stopper, instead placed in the longitudinal direction with respect to the fitting portion
It is possible to form the stopper case into a cylindrical shape,
Forms a plurality of convex portions, and the convex portion is formed on the inner peripheral surface of the insertion portion.
A concave portion is provided for engaging the portion, and the concave portion is shifted in the front-rear direction.
A lift-up curtain provided at a position to be engaged with the convex portion of the case . 2. A case, wherein the stopper is non-rotatably fitted into the fitting portion, a drum rotatably supported in the case, and rotates with the drive shaft; A slide groove for supporting the clutch ball movably only in the rotation axis direction of the drum, on an inner peripheral surface of the case, and an outer peripheral surface of the drum on the inner peripheral surface of the case. Guiding the clutch ball along the outer peripheral surface based on the rotation of the drum, and engaging the clutch ball to rotate the drum when the drum is rotated based on the weight of the curtain fabric. The guide groove for blocking is provided.
The described lift-up curtain. 3. The method according to claim 1, wherein the guide groove is provided when the operation device raises the curtain fabric.
A lifting groove that allows the clutch ball to relatively circulate on the outer peripheral surface of the drum; and
A pull-down groove that allows the clutch ball to relatively rotate on the outer peripheral surface of the drum, When the drum is rotated in the curtain-dough lowering direction by the weight of the curtain material following the lifting operation,
A stop groove that engages with the clutch ball and prevents rotation of the drum; and a state in which the clutch ball is engaged with the stop groove, the clutch ball is rotated when the drum is rotated in a direction in which the curtain cloth is pulled up. A second return groove for guiding the clutch ball to the pull-down groove, and when the drum is rotated in a direction in which the curtain cloth is pulled from the state in which the clutch ball is positioned in the pull-down groove, the clutch ball is moved to the pull-up groove. 3. The lift-up curtain according to claim 2, further comprising a first return groove for guiding. 4. The lift-up curtain according to claim 2, wherein the stopper is replaceable in the front-rear direction with respect to the insertion portion.