JP2002238735A - Roman shade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To vertically move a screen of a Roman shade by a small operation quantity and to keep the design of the screen good when the screen is rolled up. SOLUTION: This Roman shade is provided with a winding drum 20 supported rotatably, a screen 16 the upper end of which is fitted to a supporting member 12, elevating and cords 22 one end of which is connected to the drum 20 and the other end of which is connected to the lower part of the screen 16 so as to be wound and rewound, a winding spring 24 for biasing the drum 20 so as to turn in the winding direction of the elevating and lowering cords, a stopper 26 which can be switched to the state of permitting the rotation of the drum 20 or the state of blocking the rotation, and a second stopper 28 for preventing the elevating and lowering cords from being wound up by the drum 20 more than a prescribed quantity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a Roman shade.

[0002]

2. Description of the Related Art As a conventional Roman shade, a take-up drum rotatably supported by a support member, a screen having an upper end fixed to the support member, and one end connected to the take-up drum, The other end is connected to the lower part of the screen, and a lifting cord that can be wound and unwound on the winding drum, a pulley for rotating the winding drum, and an operation code wound on the pulley, A so-called drum type in which a screen is moved up and down by operating an operation code to rotate a winding drum is generally known. Or take-up drum,
Without using pulleys and operation cords, the other end of the elevating cord is guided to the other end of the head rail along the head rail as a support member, and the elevating cord is hung down via a stopper, and the other end of the elevating cord A so-called cord type in which the screen is raised and lowered by manipulating the end is also generally known.

[0003]

However, in both the drum type and the cord type, it is necessary to operate an operation code or a lifting code for raising and lowering the screen. A large operating force is required when the screen is raised, and a screen that can be moved up and down with a small amount of operation is desired.

In this regard, blinds other than the Roman shade have a built-in winding spring for urging the winding drum in the winding direction of the elevating cord, as shown in, for example, JP-A-6-240962. There has been proposed a structure in which the lifting cord is wound by the urging force of a winding pipe so that the shielding material of the blind can be raised with a small operation amount. However, the configuration described in this publication can be applied to a blind in which a shielding material is folded on the lower surface of a head box such as a horizontal blind or a pleated screen. By not doing so, it cannot be applied to those that emphasize the design of the screen that has been lifted.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a Roman shade capable of raising and lowering a screen with a small amount of operation and maintaining a good design property at the time of lifting. With that purpose.

[0006]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a winding drum rotatably supported by a support member, and an upper end of which is provided on the support member. A Roman shade comprising a screen attached and an elevating cord having one end connected to the winding drum and the other end connected to a lower portion of the screen, which can be wound and unwound on the winding drum. , A take-up spring that urges the take-up drum to rotate in the elevating cord take-up direction, a stopper that can be switched between a state in which the take-up drum is allowed to rotate and a state in which the take-up drum is prevented from rotating, and an elevating cord A second stopper for preventing a predetermined amount or more from being wound on the winding drum.

When the stopper is released to allow the rotation, the lifting cord is wound on the winding drum by the urging force of the winding spring. In this manner, the lower portion of the screen is automatically raised, so that the screen can be raised with a small operation amount of releasing the stopper. When the lifting cord is wound on the winding drum by a predetermined amount or more, the winding of the screen is automatically stopped because the winding by the winding drum is prevented by the second stopper. Thus, the screen can be prevented from being pulled into the winding drum, and the screen can be stopped in a good up state. In this way, the design property in the tucked-up state, which is a characteristic of the Roman shade, can be favorably maintained.

When it is desired to stop the lower portion of the screen at an arbitrary height, the lower portion of the screen is maintained at an arbitrary height by stopping the rotation of the winding drum by operating a stopper. can do.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are views showing an embodiment of a Roman shade of the present invention. In the figure, reference numeral 12
Denotes a head rail (supporting member) 12 attached to a window frame, a wall surface, or the like, and an upper end of a screen 16 is attached to a front surface of the head rail 12.

At both ends of the head rail 12, side plates (support members) 14, 14 are provided, respectively.
A winding pipe 18 is rotatably mounted. A winding drum 20 is integrally attached to the outside of the winding pipe 18 at a predetermined interval in the longitudinal direction. An appropriate number of winding drums 20 are provided according to the length of the winding pipe 18 in the longitudinal direction. The upper end of a lifting cord 22 is attached to each winding drum 20, and the lifting cord 22 can be wound and unwound on the winding drum 20 according to the rotation direction of the winding pipe 18. .

The lower end of the lifting cord 22 is suspended from the winding drum 20 and passes along the screen 16 through a plurality of cord rings 16a attached to the rear surface of the screen 16 at predetermined intervals in the vertical direction. The lower end of the lifting cord 22 is connected to a cord ring 16 a near the weight bar 17 attached to the lower end of the screen 16.

A winding spring 24, a stopper 26, and a second stopper 28 are mainly accommodated on the inner diameter side of the winding pipe 18 and the winding drum 20.

The take-up spring 24 is formed of a coiled spring, and has one end fixed to a fixed shaft 30 extending from one side plate 14 and the other end connected to the take-up pipe 1.
8 and is attached to a take-up pipe receiver 31 connected to the take-up drum 18 and the take-up pipe 20.
2 is always urged in the direction of rotation in the winding direction.

The stopper 26 is provided in a state in which the rotation of the winding pipe 18 and the winding drum 20 is allowed, and
And the rotation of the winding drum 20 is stopped, and the screen 16 is stopped.
Is stopped at an arbitrary height including the lowermost position.

As the stopper 26, any known configuration can be adopted. In this example, as shown in detail in FIG. 3, the stopper main shaft 40, the grooved drum 42, the stopper case 44, Stopper case cap 45, clutch spring 46 and ball 48
Consists of

The stopper main shaft 40 is connected to a bolt shaft 5 described later.
0 is connected and fixed at one end by a rivet 41,
It is non-rotatably fixed in the winding pipe 18. On the outer peripheral side of the stopper main shaft 40, a grooved drum 42 is fitted so as to be relatively rotatable. A guide groove 42a for guiding the ball 48 is formed on the outer peripheral surface of the grooved drum 42, and the ball 48 is movably fitted into the guide groove 42a. A clutch spring 46 is wound around the stopper main shaft 40 alongside the grooved drum 42, one end of the clutch spring 46 is inserted into the grooved drum 42, and the other end is in contact with the outer peripheral surface of the stopper main shaft 40. Thus, the grooved drum 42 and the stopper main shaft 40 can be connected or disconnected. That is, when the grooved drum 42 attempts to rotate in the direction of unwinding the elevating cord of the winding pipe 18, the clutch spring 46 is expanded, and the grooved drum 42 is disconnected from the stopper main shaft 40, and The rotation of the drum 42 is allowed. On the other hand, when the grooved drum 42 is about to rotate in the direction of winding the elevating cord of the winding pipe 18, the clutch spring 46 is reduced in diameter and connects the grooved drum 42 to the stopper main shaft 40. The rotation of 42 is prohibited. Further, on the outer peripheral side of the grooved drum 42,
A stopper case 44 is provided. A stopper case cap 45 is attached to one end of the stopper case 44, and the stopper case 44 and the stopper case cap 45 constitute a case. This case is rotatably supported relative to the stopper main shaft 40, and houses a grooved drum 42 in its internal space so as to be relatively rotatable. The outer peripheral surface of the stopper case 44 is engaged with the inner peripheral surface of the winding pipe 18, and the stopper case 44
Rotates integrally with the winding pipe 18. A vertical groove 44 a extending in the axial direction of the stopper main shaft 40 is formed on the inner peripheral surface of the stopper case 44.
The ball 48 is movably fitted therein.

In the present invention, a second stopper 28 is provided adjacent to the stopper 26. The second stopper 28 stops rotation of the winding drum 20 and the winding pipe 18 when the lifting cord 22 is wound on the winding drum 20 by a predetermined amount or more.

The second stopper 28 can also have an arbitrary configuration, but in this example, as shown in detail in FIG. 3, mainly the bolt shaft 50 and the moving piece 5
2, a guide member 54, a regulating assembly 56 and a stop position adjusting assembly 58.

One end of the bolt shaft 50 is connected to the side plate 14 and is fixed so as not to rotate in the winding pipe 18, and a male screw 50a is formed on the outer peripheral surface thereof. The moving piece 5 is attached to the male screw 50a of the bolt shaft 50.
Two female screws 52a are screwed together, and are movable in the axial direction of the bolt shaft 50. A guide member 54 is provided in parallel with the bolt shaft 50. The guide member 54 has one end (the right end in FIG. 3) inserted into the stop position adjusting assembly 58. The guide member 54 is formed with a guide portion 54a, and the moving piece 52 is fitted into the guide portion 54a. The movable piece 52 is relatively non-rotatable with respect to the guide portion 54a of the guide member 54, and is movable in the longitudinal direction while being guided by the guide portion 54a of the guide member 54. The stop position adjusting assembly 58 has its outer peripheral surface engaged with the inner peripheral surface of the winding pipe 18 and rotates integrally with the winding pipe 18. Accordingly, the rotation of the winding pipe 18 rotates the stop position adjusting assembly 58 and the guide member 54, and the moving piece 52 rotates with respect to the bolt shaft 50. The movable piece 52 moves in the axial direction of the bolt shaft 50 by screwing the shaft 50 with the male screw 50a.

The stop position adjusting assembly 58 includes an adjusting handle 60, a guide receiving member 62, a pipe receiving 64, and a control member (not shown). One end of the above-described guide member 54 is inserted into the guide receiving member 62, and the guide receiving member 62 and the guide member 54 rotate integrally. Further, the outer peripheral surface of the pipe receiver 64 is engaged with the inner peripheral surface of the winding pipe 18, and the pipe receiver 64 and the winding pipe 18 rotate integrally. The adjustment handle 60 is rotatable relative to the guide receiving member 62 by a predetermined angle.
0 is rotated relative to the guide receiving member 62 by a predetermined angle, so that the control member is moved and the guide receiving member 62 is rotated.
And the pipe receiver 64 can be connected or disconnected. Normally, the guide receiving member 62 and the pipe receiving 64 are connected by a control member, and
, The pipe receiver 64 and the guide receiving member 62 rotate together, and this rotation is transmitted to the guide member 54. On the other hand, when the adjustment handle 60 is rotated relative to the guide receiving member 62 by a predetermined angle during the adjustment, the control member moves to disconnect the guide receiving member 62 and the pipe receiver 64. Therefore, in this disconnected state, the adjustment handle 6
By rotating 0 in the same direction, the guide receiving member 62, the guide member 54, and the movable piece 52 can be rotated without rotating the winding pipe 18, that is, the pipe receiver 64. Thus, without rotating the winding pipe 18,
The moving piece 52 can be adjusted to an arbitrary position on the bolt shaft 50.

The regulating assembly 56 is composed of a plurality of flat washers 70 and a spring washer 72 sandwiched between adjacent flat washers 70, and is provided at the end of the male screw 50 a of the bolt shaft 50. When the movable piece 52 that moves the bolt shaft 50 in the axial direction while screwing with the male screw 50a of the bolt shaft 50 abuts on the regulating assembly 56, the movable piece 52 cannot move in the same direction any more. The movement of the moving piece 52 is regulated.

Next, the operation of the Roman shade configured as described above will be described. First, in order to lower the lower end of the screen 16, the weight bar 17 at the lower end of the screen 16 is gripped and pulled down.
Is unwound from the winding drum 20, and the winding drum 20 rotates together with the winding pipe 18.

At this time, in the stopper 26, the rotation of the winding pipe 18 in the lifting / lowering cord unwinding direction causes the stopper case 44 to rotate in the same direction, and
Since the rotational force in the same direction is also transmitted to 2, the clutch spring 46 is expanded in diameter, and the grooved drum 42 and the stopper main shaft 40 are disconnected. Thus, both the stopper case 44 and the grooved drum 42 can rotate, and the rotation of the winding pipe 18 is allowed.

At this time, in the second stopper 28, the stop position adjusting assembly 58 rotates in the same direction by the rotation of the winding pipe 18 in the lifting / lowering cord unwinding direction. Since the rotational force in the same direction is also transmitted, the moving piece 52 moves in the axial direction while being screwed to the bolt shaft 50. At this time, the moving frame 52
The bolt shaft 50 is moved away from the regulating assembly 56.
It is set to move along.

Next, when the height of the lower end of the screen 16 becomes the desired height and the downward pulling force on the screen 16 is released, the accumulated biasing force of the winding spring 24 causes the winding pipe 18 to move. , A rotational force acts in the winding direction of the lifting cord, and the winding pipe 18 rotates in that direction. At this time, in the stopper 26, the stopper case 44 rotates in the same direction together with the lifting pipe 18, and the rotational force in the same direction is transmitted to the grooved drum 42. However, since the diameter of the clutch spring 46 is reduced, the grooved drum 42 and the stopper main shaft 40 are connected, and the grooved drum 42 cannot rotate. Therefore, the stopper case 44 rotates relative to the grooved drum 42, and the ball 48 that rotates together with the stopper case 44 moves in the guide groove 42 a of the grooved drum 42 and locks on the locking portion of the guide groove 42 a. Then, further movement is prevented. As a result, the winding pipe 18 cannot rotate and the lower end of the screen 16 stops at its desired position (FIG. 4).

Next, in order to raise the lower end of the screen 16 again, the weight bar 17 is slightly pulled downward and then released. At this time, in the stopper 26, the ball 48 separates from the locking portion of the guide groove 42a,
The guide groove 42a can be moved. Therefore, the stopper case 44 can be rotated relative to the grooved drum 42 in the elevating cord winding direction. Thus, the stopper case 44 becomes rotatable, and the rotation of the winding pipe 18 is permitted.

Accordingly, the winding pipe 18 is rotated in the lifting cord winding direction by the urging force of the winding spring 24, and the winding drum 20 winds the lifting cord 22, so that the lower end of the screen 16 is It rises automatically.

At this time, in the second stopper 28, the stop position adjusting assembly 58 rotates together with the winding pipe 18 due to the rotation of the winding pipe 18 in the lifting cord winding direction, and the guide member 54 and the moving frame. Since the rotational force in the same direction is also transmitted to the moving shaft 52,
It moves in its axial direction while being screwed to zero. At this time, the moving piece 52 moves along the bolt shaft 50 in a direction approaching the regulating assembly 56.

As the weight bar 17 rises, it comes into contact with the code ring 16a immediately above, in order from the lowest code ring 16a, and by repeating this in sequence, the screen 16 is folded while forming folds.

When the lower end of the screen 16 moves upward and the moving piece 52 of the second stopper 28 moves along the bolt shaft 50 and contacts the regulating assembly 56, the moving piece 52
Can no longer move. Therefore, the rotation of the movable piece 52 is also restricted, and the rotation of the winding pipe 18 is restricted via the guide member 54 and the stop position adjusting assembly 58.
The winding to zero is prevented, and the lower end of the screen 16 stops rising (FIG. 5).

If there is no second stopper 28,
Although the screen 16 is wound around the winding drum 20, the rotation of the winding drum 20 is stopped as a result, but the folds formed on the screen 16 are also broken and the appearance is very poor. However, since the second stopper 28 is provided, as shown in FIG. 5, the lower end of the screen 16 is prevented from rising when the screen 16 is sufficiently raised, and the folds formed on the screen 16 are kept. Since 16 can be held in a desired raised shape, the appearance can be improved. In this way, the screen 16 can be raised with a small amount of operation, and the state in which the screen 16 is completely raised can be displayed with good appearance.

In order to adjust the stop height of the lower end of the screen 16 shown in FIG.
The adjustment handle 60 of the stop position adjustment assembly 58 of FIG. Accordingly, as described above, the moving piece 52 can be moved in the axial direction of the bolt shaft 50 without rotating the winding pipe 18, and by adjusting the position of the moving piece 52, the moving piece 52 can be moved. Can be changed at the timing of contact with the regulating assembly 56, and therefore, the stop height of the lower end of the screen 16 can be adjusted.

In the above-described embodiment, a plurality of winding drums 20 are respectively mounted on the outer peripheral side of the winding pipe 18 so as to be integral with the winding pipe 18 and have an outer diameter of the winding pipe 18. Is relatively large, the take-up cord 22 can be wound by rotating the take-up drum 20 with a large torque against the urging force from the take-up spring 24. However, the present invention is not limited to this configuration, and the plurality of winding drums 20 may be connected by any means such as a rod-shaped winding shaft, and the means may be urged by the winding spring 24 in the winding direction. It is.

Further, a pulley is provided at one end of the winding pipe 18, and by operating an endless operation chain wound around the pulley, rotation can be transmitted to the winding pipe 18 so that the stopper 26 is locked or released. Can be switched, the screen 16 is lowered by continuously pulling one side of the operation chain, and the stopper 26 is released by pulling a predetermined amount of the other end of the operation chain to take up It is also possible to adopt a configuration in which the screen 16 is raised by the urging force from the spring 24.

[0036]

As described above, according to the present invention,
The screen can be raised with a small operation amount by using the urging force of the winding spring, and the lifting code is prevented from being wound by a predetermined amount by the second stopper. When wound up,
Screen lift stops automatically. Because of this, without the screen being pulled into the winding drum,
The screen can be stopped in a good tapped state. In this way, the design property in the tucked-up state, which is a characteristic of the Roman shade, can be favorably maintained.

[Brief description of the drawings]

FIG. 1 is an overall front view of a Roman shade according to an embodiment of the present invention (a screen is shown by phantom lines and a partial cross-sectional view is shown).

FIG. 2 is an end view of the Roman shade of FIG. 1 as viewed along line 2-2.

FIG. 3 is a partial cross-sectional view of the inside of the winding pipe of FIG. 1 showing a stopper and a second stopper.

FIG. 4 is a view corresponding to FIG. 2, showing a state where the lower end of the screen is lowered.

FIG. 5 is a diagram corresponding to FIG. 2, showing a state in which the lower end of the screen is raised.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Head rail (support member) 16 Screen 20 Winding drum 22 Elevating cord 24 Winding spring 26 Stopper 28 Second stopper

Claims (1)

[Claims] 1. A winding drum (20) rotatably supported by supporting members (12, 14), a screen (16) having an upper end attached to the supporting member (12), and a winding drum (20). 20), one end of which is connected to the lower portion of the screen (16), and the other end of which is connected to the winding drum (2).
0) The lifting cord (2
2) a winding spring (24) for urging the winding drum (20) to rotate in the elevating cord winding direction, and a state in which the rotation of the winding drum (20) is permitted. A stopper (26) that can be switched to a state of preventing rotation and a rotation cord (22);
Second stopper (28) for preventing winding on
And a Roman shade comprising: