JP2916711B2 - Winding shaft bearing 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 winding shaft bearing device for supporting a winding shaft on which a winding coil spring for urging a shutter curtain in a winding direction is mounted.

[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 having a winding coil spring mounted thereon so as to cancel the weight of a shutter curtain and easily perform an opening operation. Have been. This coil spring has one end fixed to the winding shaft and the other end fixed to the winding wheel, and the strength of the spring is adjusted to the extent that the weight of the shutter curtain is offset. The curtain can be easily opened and closed manually.

[0003]

However, since the resilient force of the coil spring for winding is very strong, the winding strength is adjusted by rotating the winding shaft at the construction site when installing the shutter. Was difficult to do.

[0004] For example, the winding strength of the winding wheel by the winding coil spring often needs to be adjusted by adding or rewinding the coil spring while the shutter is mounted on site. This work
With the take-up shaft held in place by a pipe wrench, remove the bolts that fix the shaft to the bearing, then, while the take-up wheel is stopped, rotate the take-up shaft 180 ° in the desired direction with the pipe wrench, Although the bolts are fixed again, the coil spring has a very high elasticity, so if the pipe wrench slides or the force supporting the pipe wrench is reduced, the coil spring will be rewound and the winding shaft will rotate. It was very dangerous and difficult to adjust by yourself.

[0005] 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 hole of the take-up shaft must be aligned and fixed to the bearing, the length of the shutter curtain is reduced. If the hole is diametrically penetrated, it can only be adjusted by 180 °, and even if it is crosswise, it can only be adjusted by 90 °. You can adjust the shutter curtain by adding or removing the slats, but after fixing the suspension, the work is not only very troublesome, but also it is not possible to make fine adjustments below the width of the slats There was a problem.

Accordingly, the present invention is to easily and independently rotate the take-up shaft on which a strong spring force of the take-up coil spring acts by an arbitrary angle so that the strength and length can be adjusted steplessly and safely. The technical task is to be able to make adjustments.

[0007]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention supports an end portion of a winding shaft on which a winding coil spring for urging a shutter curtain in a winding direction is mounted on a bracket. in the bearing apparatus of Rumakito shaft is coiled locking springs for switching the winding shaft inserted through the cylindrical bearing case fixed to the bracket in rotatable state and fixed state the inner circumferential surface of the bearing case In the bearing case, it is inserted into the inside of the spring while being fixed to the end of the winding shaft on the bracket mounting side, and is wound around both ends of the spring. A fixed platen that engages in the direction
On the mouth side, there is provided an adjustment plate for a winding coil spring that is inserted inside the spring in a rotatable state around the winding shaft and engages both ends of the spring in the direction of winding reduction. , The adjusting case, the bearing case
From the outside of the opening for inserting the take-up shaft, the adjusting plate
A nut portion for rotating the nut is formed .

[0008]

According to the present invention, when the adjusting plate is rotated, the lock spring is retracted regardless of the rotation in either the left or right direction, and the winding shaft is in a rotatable state. Thereby, the winding shaft is rotated together with the lock spring and the fixed platen.

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

Further, when the winding shaft is rewound by the repelling force of the winding coil spring, the fixing plate fixed to the end of the winding shaft is rotated and the lock spring is wound and expanded. Is strongly in contact with the inner peripheral surface of the case, the frictional force increases, and the rotation of the winding shaft is immediately stopped.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus of the present invention will be described below with reference to specific embodiments shown in the drawings. 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, and FIG. 3 is a sectional view taken along line AA of FIG.

In FIG. 1, reference numeral 1 denotes a shutter case (not shown).
A bearing device fixed to the bracket 2 for supporting the end portion of the winding shaft 3, wherein a shutter winding wheel 4
Are urged in the winding direction by the winding coil spring 5 and attached. The winding coil spring 5 is
One end is fixed to the winding shaft 3 and the other end is fixed to the winding wheel 4.

A winding shaft 3 is inserted into a 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. 6 so as to be in close contact with the inner peripheral surface. The lock spring 7 is formed such that a winding start end 7a and a terminal end 7b are bent in a hook shape inward.

In the bearing case 6, a bracket is provided.
On the attachment side, a fixed plate that is inserted into the inside of the spring 7 while being fixed to the end of the winding shaft 3 and engages with the winding start end 7a and the end 7b of the spring in the winding direction. 8 is provided on the opening side for inserting the winding shaft.
And an adjusting plate 9 for a coil spring 5 for winding, which is rotatable about the winding shaft 3 with respect to a winding start end 7a and a terminal end 7b of the spring 7 in a winding contraction direction. Have been.

A flange 10 is formed on the fixed platen 8 so as to be in sliding contact with the inner peripheral surface of the bearing case 6.
0, a concave groove 11 is formed to be engaged with the pin 3a of the winding shaft 3. On the opposite side, the winding start end portion 7a and the end portion 7b of the lock spring 7 when rotated by the torque transmitted from the winding shaft 3.
The engaging portion 12 which is brought into contact with the lock spring 7 in the direction of expanding the lock spring 7 is inserted into the lock spring 7.

The adjusting plate 9 is provided with a through hole 13 through which the winding shaft 3 passes, and a flange portion 14 which is slidably contacted with the inner peripheral surface of the bearing case 6. A hexagonal nut portion 15 protruding out of the bearing case 6 is formed on one side with the 14 interposed therebetween. On the opposite side, an engaging portion 16 which is brought into contact with the winding start end portion 7a and the terminal end portion 7b of the lock spring 7 in a direction in which the lock spring 7 is retracted when the hexagon nut portion 15 is rotated.
Are inserted into the lock spring 7. That is,
The hexagon nut 15 of the adjusting plate 9 is
For inserting the take-up shaft formed on the side opposite to the
It protrudes out of the case 6 from the opening side and the bracket
2 from the direction in which the winding shaft 3 extends.
It is made so that it can be made.

The above is an example of the configuration of the present invention, and its operation will now be described. First, a lock spring 7 fitted in a bearing case 6 into which the winding shaft 3 is inserted.
Then, the fixing plate 8 and the adjustment plate 9 are assembled from both sides so as to be engaged with each other, the pin 3a is inserted into the winding shaft 3, and the fixing plate 8 is integrally attached thereto.

At this time, the engaging portion 12 of the fixed platen 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 interposed therebetween. 7
Is positioned so as to abut in the direction in which the
Of the winding start end 7a and the end 7b,
The lock spring 7 is positioned so as to be in contact with the direction in which the lock spring 7 is retracted.

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

Therefore, the lock spring 7 is retracted and wound in any direction, and if the take-up wheel 4 is fixed, the take-up coil spring 5 is added in accordance with the rotation direction of the adjusting plate 9. Or rewind. In this case, a hexagon nut for rotating the adjustment
The bearing part 15 is on the side opposite to the bracket mounting side of the bearing case 6.
From the side of the winding shaft insertion opening formed in
Because it protrudes out of the base 6,
From the same side where the winding shaft 3 is extended
While holding the winding wheel 4 with one hand,
The nut part 15 can be rotated with the other hand.
You.

When the wrench is removed from the adjusting plate 9, the lock spring 7, which has been wound and contracted by the engaging portion 16 of the adjusting plate 9, returns to its original position by its resilient force and returns to the inner periphery of the bearing case 6. The winding shaft 3 is kept in a fixed state in close contact with the surface. Therefore, the winding shaft 3 can be easily rotated by an arbitrary angle, and the winding strength of the winding coil spring 5 can be adjusted very easily by adding and rewinding. In the case where 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, so that fine adjustment is possible.

When the resilient force of the winding coil spring 5 acts in the direction of rewinding the winding shaft 3, the engaging portion 12 of the fixed plate 8 comes into contact with the start end 7a or the end 7b, Since the lock spring 7 is unwound, the outer peripheral surface of the lock spring 7 is strongly pressed against the inner peripheral surface of the bearing case 6, so that the lock spring 7 cannot rotate and the winding shaft 3 is maintained in a fixed state.

The fixing plate 8 and the take-up shaft 3 are not limited to being engaged with the pins 3a, but may employ any mounting means. Further, the shape of the nut portion 15 of the adjusting plate 9 is not limited to a hexagon, and may be any shape as long as the shape 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 the 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.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION 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 board 9 ... adjustment board

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E06B 9/17-9/174

Claims (1)

(57) [Claims] 1. A of Rumakito shaft ends is supported by the bracket (2) winding a coil spring for the winding for biasing the shutter curtain in the winding direction (5) is mounted a shaft (3) bearing In the apparatus, the bracket
(2) inserted into the cylindrical bearing casing (6) which is fixed
A coil-shaped lock spring (7) for switching the take-up shaft (3) between a fixed state and a rotatable state is fitted in tight contact with the inner peripheral surface of the bearing case (6), and the bearing case (6). Inside, the bracket (7) is inserted through the inside of the spring (7) while being fixed to the end of the winding shaft (3) on the bracket mounting side.
A fixing plate (8) is provided which engages with both ends (7a, 7b) of the winding shaft in the winding direction, and an opening for inserting the winding shaft is provided.
Side, is inserted inside the spring (7) in a rotatable state about the winding shaft (3), and engages with both ends (7a, 7b) of the spring (7) in the winding contraction direction. Adjusting plate (9) for winding coil spring (5)
Is provided, and the adjustment case (9) is provided with the bearing case.
(6) From the outside of the winding shaft insertion opening,
A nut part (15) for rotating the adjusting plate (9) is formed.
The bearing device of the winding shaft, characterized in that is.