JPH0518167A - Bearing device for winding shaft - Google Patents

Abstract

PURPOSE:To simply adjust the strength of a coil spring by simply rotating a winding shaft applied with the strong elastic force of the winding coil spring of a balance shutter and the like by an optional angle by oneself. CONSTITUTION:A lock spring 7 switching a winding shaft 3 inserted into a bearing case 6 to the fixed state or the rotatable state is inserted into a bearing case 6, and a fixed disk 8 coupled with the lock spring 7 in the expanding direction while being fixed to the end section of the winding shaft 3 and an adjusting disk 9 coupled with the lock spring 7 in the shrinking direction while being kept rotatable around the winding shaft 3 are provided. When the adjusting disk 9 is rotated, the lock spring 7 is shrunk, the winding shaft 3 can be rotated by an optional angle, the lock spring 7 is expanded by the fixed disk 8 even if the winding shaft 3 is unwound, and the rotation of the winding shaft 3 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding shaft bearing device for supporting a winding shaft to which a winding coil spring for urging a shutter curtain in a winding direction is attached.

[0002]

2. Description of the Related Art For example, a balance shutter which is opened and closed by a manual operation uses a winding shaft equipped with a winding coil spring so that the weight of the shutter curtain can be canceled and the opening operation can be easily performed. Has been done. This coil spring has one end fixed to the winding shaft and the other end fixed to the winding wheel, and the spring strength is adjusted to the extent that the weight of the shutter curtain is offset. Even curtains can be easily opened and closed manually.

[0003]

However, since the coil spring for winding is very strong in resilience, the winding strength can be adjusted by rotating the winding shaft at the construction site when installing the shutter. Was difficult to do.

For example, it is often necessary to adjust the winding strength of the winding wheel by the winding coil spring by adding or rewinding the coil spring with the shutter installed on site. This work
While holding the take-up shaft with a pipe wrench, remove the bolts that fix the shaft to the bearing, then with the take-up wheel stopped, rotate the take-up shaft 180 ° in the desired direction with the pipe wrench, Although it is fixed again with bolts, the coil spring has a very strong resilience, so if the pipe wrench slips or the force that supports the pipe wrench is weakened, the coil spring is rewound and the winding shaft reverses. As a result, the adjustment work by one person was very dangerous and difficult.

The length of the shutter curtain is adjusted by rotating the take-up shaft to adjust the position of the suspension. However, since the bolt holes of the take-up shaft must be aligned and fixed to the bearing, the bolts must be fixed. If the hole is diametrically penetrated, it can only be adjusted by 180 °, and even if it is crossed in a cross, it can only be adjusted by 90 °. It is possible to adjust by adding or removing the slats of the shutter curtain, but after fixing the suspension, not only is the work extremely troublesome, but it is impossible to make fine adjustments below the width of the slats. There was a problem.

Therefore, according to the present invention, the winding shaft on which the strong springing force of the winding coil spring acts can be easily rotated by one person by an arbitrary angle to adjust the strength and length safely and steplessly. The technical challenge is to be able to make adjustments.

[0007]

In order to solve this problem, the present invention relates to a winding shaft supporting a winding shaft to which a winding coil spring for urging a shutter curtain in a winding direction is attached. In the bearing device, a coil-shaped lock spring that switches a take-up shaft inserted in a cylindrical bearing case between a fixed state and a rotatable state is fitted in close contact with the inner peripheral surface of the bearing case, A fixed plate that is inserted into the inside of the spring in a state of being fixed to the end of the winding shaft, and engages with both ends of the spring in the unfolding direction, and rotates around the winding shaft as an axis. An adjusting plate for the coil spring for winding is provided which is freely inserted into the inside of the spring and engages with both ends of the spring in the winding contraction direction. And wherein the Rukoto.

[0008]

According to the present invention, when the adjusting plate is rotated, the lock spring is contracted to rotate the winding shaft regardless of whether the adjusting plate is rotated in the left or right direction. As a result, the winding shaft is rotated together with the lock spring and the fixed platen.

When the rotation of the adjusting plate is stopped, the retracted lock spring returns to its original position due to its repulsive force and comes into close contact with the inner peripheral surface of the bearing case, so that the winding shaft is fixed. The strength of the winding coil spring and the length of the shutter curtain can be adjusted steplessly by rotating the winding shaft by an arbitrary angle.

When the winding shaft is rewound due to the elastic force of the winding coil spring, the fixed plate fixed to the end of the winding shaft is rotated and the lock spring is unrolled. Is strongly contacted with the inner peripheral surface of the case, the frictional force is increased, and the rotation of the winding shaft is immediately blocked.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The device of the present invention will be described below with reference to specific embodiments shown in the drawings. 1 is an exploded assembly view showing a bearing device for a winding shaft according to the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional view taken along line AA of FIG.

Reference numeral 1 in the figure is a shutter case (not shown).
Is a bearing device that is fixed to the bracket 2 of the shutter and supports the end portion of the winding shaft 3, and the winding wheel 4 of the shutter.
Is urged in the winding direction by the winding coil spring 5 and attached. The coil spring 5 for winding is
One end is fixed to the winding shaft 3 and the other end is fixed to the winding wheel 4.

The winding shaft 3 is inserted into the cylindrical bearing case 6 of the bearing device 1, and a coil-shaped lock spring 7 for switching the winding shaft 3 between a fixed state and a rotatable state is provided in the case. It is fitted so as to be in close contact with the inner peripheral surface of 6. The lock spring 7 is formed by winding the winding start end portion 7a and the end portion 7b inwardly in a hook shape.

Further, the bearing case 6 is inserted into the inside of the spring 7 while being fixed to the end portion of the winding shaft 3 and wound around the winding start end portion 7a and the end portion 7b of the spring 7. The fixing plate 8 engaging in the expanding direction and the spring 7 in a rotatable state around the winding shaft 3 as an axis.
The winding start end portion 7a of the spring 7 that is inserted inside the
An adjusting plate 9 for the coil spring 5 for winding is provided which engages with the end portion 7b in the winding contraction direction.

The fixed platen 8 is formed with a flange portion 10 which is slidably contacted with the inner peripheral surface of the bearing case 6, and the flange portion 1 is formed.
A concave groove 11 to be engaged with the pin 3 a of the winding shaft 3 is formed on one side of the winding shaft 3. Further, on the opposite surface side, the winding start end portion 7a and the end portion 7b of the lock spring 7 are rotated when rotated by the torque transmitted from the winding shaft 3.
On the other hand, the engaging portion 12 that abuts in the direction in which the lock spring 7 is rolled up is inserted into the lock spring 7.

The adjusting plate 9 is formed with a through hole 13 through which the winding shaft 3 is loosely formed, and a flange portion 14 which is slidably contacted with the inner peripheral surface of the bearing case 6 is formed. A hexagonal nut portion 15 is formed on one side of the bearing case 6 so as to protrude from the bearing case 6 with the pinch 14 interposed therebetween. Further, on the opposite side, when the hexagon nut portion 15 is rotated, an engaging portion 16 is brought into contact with the winding start end portion 7a and the end portion 7b of the lock spring 7 in a direction in which the lock spring 7 is retracted.
Is inserted into the lock spring 7.

The above is an example of the configuration of the present invention, and its operation will be described below. First, the lock spring 7 fitted in the bearing case 6 in which the winding shaft 3 is inserted.
After assembling the fixed platen 8 and the adjusting plate 9 from both sides, the pins 3a are inserted into the winding shaft 3 and integrally attached to the fixed platen 8, and then the bearing case 6 is fixed to the bracket 2.

At this time, the engaging portion 12 of the fixed plate 8 and the engaging portion 16 of the adjusting plate face each other with the winding start end portion 7a and the end portion 7b sandwiched therebetween, and the engaging portion 12 of the fixed plate 8 is a lock spring. 7
The adjustment plate 9 is positioned so as to abut in the direction in which the
The engaging portion 16 of the winding start end portion 7a and the winding end portion 7b,
The lock spring 7 is positioned so as to abut in the direction in which the lock spring 7 is retracted.

Here, for example, the coil spring 5 for winding is used.
In order to adjust the strength of the lock plate 7, the hexagonal nut portion 15 of the adjusting panel 9 is rotated, for example, in the direction of arrow F in FIG. Is contracted and becomes rotatable in the bearing case 6. In this state, further adjustment panel 9
When is rotated, the lock spring 7 is rotated together with the fixed platen 8 and the winding shaft 3. Further, when the engaging portion 16 is rotated in the direction of the opposite arrow F, the other end 16b side of the engaging portion 16 is the end portion 7b.
When the adjusting plate 9 is rotated further, the lock spring 7 is rotated together with the fixed plate 8 and the winding shaft 3.

Therefore, the lock spring 7 is contracted by winding in any direction, and if the winding wheel 4 is fixed, the winding coil spring 5 may be added or wound depending on the rotating direction. Can be returned.

When the wrench is removed from the adjusting panel 9, the lock spring 7, which has been contracted by the engaging portion 16 of the adjusting panel 9 until now, returns to its original position due to its elastic force, and the inner circumference of the bearing case 6 is restored. It is in close contact with the surface and keeps the winding shaft 3 fixed. Therefore, the winding shaft 3 can be easily rotated by an arbitrary angle, and the winding strength can be adjusted by rewinding and rewinding the winding coil spring 5 very easily. Even when the length of the shutter curtain 2 is adjusted, the winding shaft 3 can be rotated by an arbitrary angle in the same procedure as described above, and thus fine adjustment is possible.

When the elastic force of the winding coil spring 5 acts in the direction of rewinding the winding shaft 3, the engaging portion 12 of the fixed platen 8 is brought into contact with the starting end portion 7a or the terminating end portion 7b, Since the lock spring 7 is unrolled and expanded, the outer peripheral surface of the lock spring 7 is strongly pressed against the inner peripheral surface of the bearing case 6 so that it cannot rotate, and the winding shaft 3 is maintained in a fixed state.

The fixed platen 8 and the winding shaft 3 are not limited to being engaged by the pin 3a, and any attachment means can be adopted. Further, the shape of the nut portion 15 of the adjusting panel 9 is not limited to the hexagonal shape, and may be any shape as long as it can be rotated from the outside.

[0024]

As described above, according to the present invention, the adjusting plate can be easily rotated by one person, and the winding shaft can be rotated by an arbitrary angle to increase the strength of the winding coil spring. It has a very excellent effect that the length of the shutter curtain can be adjusted steplessly and safely.

[Brief description of drawings]

FIG. 1 is an exploded view showing a bearing device for a winding shaft according to the present invention.

FIG. 2 is a sectional view thereof.

3 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 3 ... Winding shaft 4 ... Winding wheel 5 ... Winding coil spring 6 ... Bearing case 7 ... Lock spring 7a ... Winding start end 7b ... Winding end 8・ ・ ・ Fixed plate 9 ・ ・ ・ Adjusting plate

Claims (1)

Claim: What is claimed is: 1. A bearing device for a winding shaft, which supports a winding shaft (3) to which a winding coil spring (5) for urging a shutter curtain in a winding direction is attached. A coil-shaped lock spring (7) for switching the winding shaft (3) inserted in the cylindrical bearing case (6) between a fixed state and a rotatable state is in close contact with the inner peripheral surface of the bearing case (6). And is inserted into the inside of the spring (7) while being fixed to the end portion of the winding shaft (3) in the bearing case (6) so that both ends (7a) of the spring (7) are inserted. , 7b) is engaged with the stationary platen (8) in the unfolding direction, and is inserted into the spring (7) so as to be rotatable around the winding shaft (3) as an axis. ) Both ends (7a Winding coil spring for winding contracted engagement direction relative 7b) (5) of the adjusting plate (9) bearing device of the winding shaft, characterized in that is provided.