JP3261096B2 - Screen lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen elevating device for elevating a screen based on operation of an operation code.

[0002]

2. Description of the Related Art Conventionally, as one type of roll blind, a screen is hung from a winding shaft rotatably supported between a pair of support brackets, and is hung from an operating device provided on one side of the winding shaft. In some cases, the operation code is operated to rotate the winding shaft to move the screen up and down.

In such a roll blind, if the width and the vertical stroke of the screen suspended and supported from the winding shaft increase, the weight of the screen increases.
A large operating force is required to rotationally drive the winding shaft in the screen lifting direction. Therefore, in a large-sized roll blind, a spring motor is provided in the winding shaft in order to reduce the operation force in the screen lifting direction.

The above-mentioned spring motor is constituted by a torsion coil spring, one end of which is fixed to a fixed shaft of the winding shaft, the other end of which is fixed to the winding shaft, and the winding shaft moves in the screen descending direction. When rotated, the torsion coil spring is charged.

[0005] An urging force adjusting device for adjusting the urging force of the torsion coil spring is connected to the spring motor. That is, the end of the adjustment shaft for adjusting the urging force of the torsion coil spring when the screen is pulled up to the upper limit is exposed on the outer side surface of the one support bracket. By rotating the fixed shaft without rotating the winding shaft by operating the adjustment shaft, the biasing force of the torsion coil spring can be adjusted, and the fixed shaft and the adjustment shaft can be adjusted by the biasing force of the torsion coil spring. Rotation is prevented.

Then, by rotating the adjusting shaft,
The biasing force of the torsion coil spring is set to be substantially equal to the weight of the screen hanging from the winding shaft. Therefore, the biasing force of the torsion coil spring substantially equal to the weight of the screen hung from the winding shaft acts on the winding shaft. Therefore, when the operation code is operated to pull up the screen, the screen is pulled up. The operation can be performed with a slight operation force.

[0007]

The above-mentioned roll blind is provided with an operating device on the right side of the winding shaft and a right-hand operation for hanging an operating code on the right side of the screen. And a left-hand operation code for hanging an operation code on the left side of the screen.

The operating device is formed as a left-right type, and for left operation, the operating device is attached to the left support bracket, and an operating cord is hung from the operating device. The winding shaft and the screen hanging from the winding shaft are also used for both left and right.

However, if the spring motor and the urging force adjusting device are switched left and right with respect to the winding shaft, the direction in which the screen is pulled up by the winding shaft and the urging direction of the torsion coil spring do not match.

Then, at least the spring motor
It is necessary to prepare separate parts having different winding directions of the torsion coil spring for the right operation and the left operation. Therefore,
When the right operation and the left operation are set as product specifications, there is a problem that the number of parts increases and the cost increases.

An object of the present invention is to provide a screen lifting / lowering device capable of reducing the number of parts by using a common spring motor while setting right and left operation as product specifications.

[0012]

According to a first aspect of the present invention, a winding shaft is rotatably supported between a pair of supporting members, and a screen is hung from the winding shaft to be provided on one side of the winding shaft. A screen elevating device provided with a spring motor for rotating the take-up shaft by operating the device so that the screen can be moved up and down and for applying a rotational force to the take-up shaft in a screen pulling-up direction; At both ends of the motor, connecting means for detachably connecting the spring motor to the support member is provided, and the spring motor is fitted movably in the axial direction within the winding shaft, and The support member was connected to either end.

According to a second aspect of the present invention, an urging force adjusting device is provided on one side of the winding shaft so that the urging force of the spring motor can be adjusted from outside, and the urging force adjusting device is provided at both ends of the spring motor. A connecting means for detachably connecting is provided, and the urging force adjusting device is connected to one end of the spring motor.

According to a third aspect of the present invention, one of the urging force adjusting device and the spring motor is provided with a connecting shaft, and the other is provided with a connecting hole through which the connecting shaft can be fitted. The inside of the winding shaft is detachable in the axial direction of the winding shaft.

According to a fourth aspect of the present invention, the urging force adjusting device forms the connection hole in a wind cap that rotates based on the rotation of an adjusting shaft that is rotatable from the outside. And a clutch device for preventing rotation of the wind cap based on the urging force of the spring motor.

According to claim 5, the spring motor is
The connecting shaft is formed at both ends of the fixed shaft, and a first fitting member fitted to the winding shaft is rotatably supported at one end side of the fixed shaft, and in the vicinity of the first fitting member. A wind plug is fixed to the fixed shaft, and the other end of the fixed shaft rotatably supports a second fitting member fitted to the winding shaft,
Both ends of the torsion coil spring were attached to the wind plug and the second fitting member.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the roll blind shown in FIGS. 1 and 2, a plurality of mounting brackets 1 are fixed to a mounting surface such as an upper frame of a window, and the mounting bracket 2 supports the mounting frame 2.

A pair of support members 3a, 3b are attached to both ends of the mounting frame 2, and the support members 3a, 3b
A take-up shaft 4 is rotatably supported therebetween. A screen 5 is wound around the winding shaft 4, and the screen 5 is moved up and down as the winding shaft 4 rotates. A bottom rail 6 is suspended from the lower end of the screen 5.

An operating device 7 is attached to the right supporting member 3a of the supporting members 3a and 3b.
An endless operation code 8 hangs down. And
By operating the operation code 8, the pulley 9 in the operation device 7 is operated.
Is rotated, the winding shaft 4 is rotated via a gear mechanism in the operation device 7. Therefore, the roll blind is for right operation, and the screen 5 can be moved up and down based on the operation of the operation code 8.

A spring motor 10 and an urging force adjusting device 11 for adjusting the urging force of the spring motor 10 are built in one side of the winding shaft 4. The configurations of the biasing force adjusting device 11 and the spring motor 10 will be described below.

As shown in FIG. 3, a bearing shaft 12 is fixed to the left support member 3b.
2, a bearing cap 13 is rotatably supported on the outer peripheral surface. The distal end of the bearing shaft 12 is formed in a substantially rectangular cylindrical shape, and is exposed to the distal end side of the bearing cap 13.

A pipe cap 14 is fitted to the outer peripheral surface of the bearing cap 13 so as to be relatively non-rotatable, and the winding shaft 4 is fitted to the outer peripheral surface of the pipe cap 14. Therefore, the winding shaft 4 is rotatably supported by the bearing shaft 12 via the pipe cap 14 and the bearing cap 13.

An adjusting shaft 15 for adjusting the urging force of the spring motor 10 is rotatably supported at the center of the bearing shaft 12.
The base end of 5 is exposed on the side surface of the support member 3b. A hexagonal hole 16 is formed at the base end of the adjustment shaft 15, and can be rotated by inserting a hexagonal rod-shaped jig.

The distal end of the adjusting shaft 15 is formed in a hexagonal shaft shape, and a cam shaft 17 is fitted to the distal end. Therefore, when the adjustment shaft 15 is rotated, the cam shaft 17 is integrally rotated.

A spring drum 18 is provided around the camshaft 17. A square hole 19 is formed at the base end of the spring drum 18, and the square hole 19 is fitted to the square cylindrical tip of the bearing shaft 12. Therefore, the spring drum 18 is mounted on the bearing shaft 12.
It is supported so that it cannot rotate.

On the inner peripheral surface of the spring drum 18,
A clutch spring 20 is provided. The clutch spring 20 is formed of a torsion coil spring, and is pressed against the inner peripheral surface of the spring drum 18 by its own urging force to expand the diameter. The clutch spring 20 is formed in a square cross section so that a sufficient frictional force can be obtained on the inner peripheral surface of the spring drum 18.

As shown in FIG. 6, both ends 21a and 21b of the clutch spring 20 are bent toward the center, and the camshaft 1 is provided between both ends 21a and 21b.
7 is located.

Then, the adjusting shaft 15 is rotated to rotate the camshaft 17, and the cam portion 22 is moved to the ends 21a, 21b.
In this case, the diameter of the clutch spring 20 is reduced, and the frictional force with the inner peripheral surface of the spring drum 18 decreases. Accordingly, the camshaft 17 is rotated integrally with the adjustment shaft 15 based on the rotation of the adjustment shaft 15.

At the open end of the spring drum 18, a wind cap 23 is supported at the tip of the adjusting shaft 15. A cylindrical portion that covers the spring drum 18 is formed at the base end side of the wind cap 23, and cam portions 2 located on both sides of the ends 21 a and 21 b of the clutch spring 20 are formed at the center of the cylindrical portion.
4 are formed.

When the wind cap 23 rotates and the cam portion 24 comes into contact with one of the end portions 21a and 21b, the clutch spring 20 expands in diameter and friction with the inner peripheral surface of the spring drum 18 occurs. Power increases. Therefore, the rotation of the wind cap 23 is prevented based on the rotation force acting on the wind cap 23.

At the tip of the wind cap 23,
A connection hole 25 for connecting the spring motor 10
Is opened on the tip side. The connection hole 25 is formed as a substantially square hole.

The adjusting force adjusting device 11 is composed of the adjusting shaft 15, the cam shaft 17, the spring drum 18, the clutch spring 20 and the wind cap 23.

The fixed shaft 26 of the spring motor 10
Is configured such that base ends of first and second pipe stoppers 28a and 28b are fitted and fixed to both ends of a cylindrical coil guide 27, respectively. At the distal ends of the first and second pipe stoppers 28a and 28b, a substantially square shaft-like connecting shaft 2 that can fit into the connecting hole 25 of the wind cap 23 is provided.
9 are formed respectively.

A first fitting member 30a is supported at one end of the first pipe stopper 28a so as to be rotatable and immovable in the axial direction. The first pipe stopper 28
A wind plug 31 is fitted and fixed to a so that it cannot rotate relatively and cannot move in the axial direction, and one end of a torsion coil spring 32 is fixed to the outer peripheral surface thereof.

A second fitting member 30b is rotatably fitted to the second pipe stopper 28b so as to be immovable in the axial direction. As shown in FIG. 5, the first and second fitting members 30a and 30b are not rotatable relative to the winding shaft 4 within the winding shaft 4 and are movable in the axial direction. Mated.

The other end of the torsion coil spring 32 is fixed to the second fitting member 30b. In the right operation spring motor 10 shown in FIG.
The connection shaft 29 of the first pipe stopper 28a is fitted in the connection hole 25 of the wind cap 23 of the biasing force adjusting device 11 provided at the left end of the winding shaft. The first fitting member 30 a is located near the left end of the winding shaft 4, and the second fitting member 30 b is located at the longitudinal center of the winding shaft 4.

The spring motor 10 is composed of the fixed shaft 26, the first and second fitting members 30a and 30b, the wind plug 31, and the torsion coil spring 32.

Next, the operation of the roll blind configured as described above will be described. In order to adjust the urging force of the spring motor 10 with the urging force adjusting device 11, the jig is fitted into the hexagonal hole 16 of the adjusting shaft 15, and the adjusting shaft 15 is rotated while the rotation of the winding shaft 4 is blocked. I do.

Then, the adjustment shaft 15 is rotated to rotate the cam shaft 17, the clutch spring 20 is reduced in diameter, and the wind cap 23 is rotated together with the cam shaft 17. Then, based on the rotation of the wind cap 23, the fixed shaft 26 is rotated.

At this time, when the adjusting shaft 15 is rotated in the screen lifting direction, the fixed shaft 26 is rotated in the same direction, the torsion coil spring 32 is charged, and the adjusting shaft 15 is rotated in the screen lowering direction. Then, the torsion coil spring 32 is castrated. Thus, the biasing force of the spring motor 10 can be set optimally.

When the winding shaft 4 is rotated in the screen lowering direction by operating the operation code 8 with the biasing force of the spring motor 10 being optimally set, the screen 5 is rewound from the winding shaft 4. And descend. At this time, since the rotational force transmitted from the first pipe stopper 28a to the wind cap 23 is supported by the spring drum 18, the fixed shaft 26 is non-rotatably supported.

Then, the torsion coil spring 32 is charged by the wind plug 31 fixed to the fixed shaft 26 and the second fitting member 30b rotating together with the winding shaft 4. When the operation of the operation code 8 is stopped by lowering the screen 5 to a desired position, the screen 5 is held at the position by the operation of the brake device in the operation device 7.

When the operation code 8 is operated to rotate the winding shaft 4 in the screen pulling direction, the screen 5 is wound up by the winding shaft 4. At this time, the fixed shaft 26 is supported so as not to rotate. Then, the torsion coil spring 32 is formed by the wind plug 31 fixed to the fixed shaft 26 and the second fitting member 30b rotating together with the winding shaft 4.
Is castrated. When the operation of the operation code 8 is stopped by lifting the screen 5 to a desired position, the operation device 7
The screen 5 is held at the position by the operation of the brake device inside.

When the roll blind is to be operated leftward, the operating device 7 is attached to the left end of the winding shaft, and the urging force adjusting device 11 is attached to the right end of the winding shaft 4 as shown in FIG. Attach.

That is, the spring motor 10 is positioned on the right end side of the winding shaft 4, and the connecting shaft 29 of the second pipe stopper 28 b is fitted into the connecting hole 25 of the wind cap 23.

In the roll blind constructed as described above, the biasing force of the spring motor 10 can be adjusted by rotating the adjusting shaft 15 as in the case of the right operation.

The operation code 8 is operated to operate the winding shaft 4.
Is rotated in the screen lowering direction, the screen 5 is lowered, the spring motor 10 is charged, and the winding shaft 4 is rotated.
Is rotated in the screen pulling direction, the screen 5
And the spring motor 10 is castrated.
Then, when the operation of the operation code 8 is stopped, the screen 5 is held at a desired position.

At this time, the urging force of the spring motor 10 is applied to the second fitting member 30 located near the right end of the winding shaft 4.
It acts on the winding shaft 4 via b. With the roll blind as described above, the following operational effects can be obtained. (1) By operating the operation code 8, the screen 5 can be moved up and down with a small operation force based on the action of the spring motor 10. (2) The spring motor 10
Can be adjusted. Further, by adjusting the urging force of the spring motor 10, the operation force required for the screen lifting operation can be adjusted. (3) Since the roll blinds for the right operation and the left operation can be configured by the common operation device 7, the urging force adjustment device 11, and the spring motor 10, the number of parts can be reduced and the cost can be reduced. it can. (4) The operating device 7 and the biasing force adjusting device 11 are swapped left and right, and the spring motor 10 is moved within the winding shaft 4,
By connecting with the biasing force adjusting device 11, the operation convenience of right operation or left operation can be easily changed at the installation site of the roll blind.

The roll blind may have the following configuration. Although the connection shaft 29 is formed at the end of the fixed shaft 26 and the connection hole is formed in the wind cap 23, the connection hole may be formed at the end of the fixed shaft 26 and the connection shaft may be formed in the wind cap 23. Good. -The cross-sectional shape of the connection shaft 26 and the connection hole 25 may be any shape other than a square. The spring motor 10 can be used as an auxiliary function for the screen winding operation.
The screen 5 may be pulled up by an urging force of zero. -It is also possible to adopt a configuration in which one end of the spring motor 10 is directly connected to one of the support members 3a and 3b without providing the urging force adjusting device 11. -The screen elevating device of the above embodiment can be applied to a screen elevating device of a seat shutter in addition to the roll blind.

The technical ideas other than the claims described in the above embodiment will be described below together with their effects. (1) The clutch device according to (3), wherein the clutch device is disposed in the spring drum so as to be non-rotatably fixed to the support member, and is freely disposed with respect to the spring drum based on rotation of the adjustment shaft. And a clutch spring that makes the wind cap rotatable, and presses against the spring drum based on the rotational force acting on the wind cap to make the wind cap unrotatable. The clutch device can be formed with a simple configuration.

[0051]

As described in detail above, the present invention provides a screen elevating device capable of reducing the number of parts by using a common spring motor while setting right and left operation as product specifications. can do.

[Brief description of the drawings]

FIG. 1 is a front view showing a roll blind according to an embodiment.

FIG. 2 is a side view showing a roll blind.

FIG. 3 is a cross-sectional view showing a biasing force adjusting device and a spring motor when used for a right operation.

FIG. 4 is a cross-sectional view showing a biasing force adjusting device and a spring motor when used for a left operation.

FIG. 5 is a sectional view showing a spring motor in the winding shaft.

FIG. 6 is a sectional view taken along line AA in FIG. 3;

[Explanation of symbols]

 3a, 3b Supporting member 4 Winding shaft 5 Screen 7 Operating device 10 Spring motor 11 Energizing force adjusting device 25 Connecting means (connecting hole) 29 Connecting means (connecting shaft)

Claims (5)

(57) [Claims] 1. A winding shaft is rotatably supported between a pair of supporting members, a screen is hung from the winding shaft, and the winding shaft is rotated by operating an operation device provided on one side of the winding shaft. A screen motor capable of raising and lowering the screen, and having a spring motor in the winding shaft for applying a rotational force to the winding shaft in a screen pulling direction, wherein the spring motor is provided at both ends of the spring motor. A connecting means for detachably connecting the supporting member to the supporting member, the spring motor being fitted movably in the axial direction within the winding shaft, and the supporting member being attached to one end of the spring motor. Screen elevating device, characterized in that: 2. A biasing force adjusting device for adjusting the biasing force of the spring motor from the outside is provided on one side of the winding shaft, and the biasing force adjusting device is detachably attached to both ends of the spring motor. 2. The screen elevating device according to claim 1, wherein a connecting means for connecting is provided, and the urging force adjusting device is connected to one end of the spring motor. 3. A connecting shaft is provided on one of the urging force adjusting device and the spring motor, and a connecting hole is provided on the other side so that the connecting shaft can be fitted. The connecting shaft and the connecting hole are connected to the winding shaft. 3. The screen elevating device according to claim 2, wherein the screen elevating device is detachable in the axial direction of the winding shaft. 4. The biasing force adjusting device, wherein the connecting hole is formed in a wind cap that rotates based on rotation of an adjusting shaft that is rotatable from outside, and the connecting hole is provided between the wind cap and the adjusting shaft. 4. A clutch device for preventing rotation of the wind cap based on a biasing force of a spring motor is provided.
A screen elevating device as described in the above. 5. The spring motor has the connecting shaft formed at both ends of a fixed shaft, and rotatably supports a first fitting member fitted to the winding shaft at one end of the fixed shaft, A wind plug is fixed to the fixed shaft in the vicinity of the first fitting member, and the other end of the fixed shaft rotatably supports a second fitting member fitted to the winding shaft, The screen lifting device according to claim 3, wherein both ends of the torsion coil spring are attached to the wind plug and the second fitting member.