JPH0788737B2 - Shutter winding 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 shutter winding device for assisting manual operation when manually opening a shutter for opening and closing a building entrance.

[0002]

2. Description of the Related Art With a relatively lightweight shutter, the shutter body is manually moved up and down. In order to reduce the operating force during the manual operation, a torsion coil spring is generally interposed between the shutter main body and the building frame so that the shutter main body can be lifted with a light operating force. However, since the lower end of the shutter body collides strongly with the building frame near the end of the upward movement of the shutter body, a buffer coil spring is used separately from the coiling coil for avoiding this. This buffer coil spring rotates in response to the raising / lowering motion of the shutter body, and the stopper provided on the building frame moves relative to this buffer coil spring, engaging the end of the coil spring near the end of the ascending stroke of the shutter body. In this case, a biasing force is applied in the direction opposite to that of the winding torsion coil spring to reduce the rising speed of the shutter body.

For this reason, in the conventional winding device, it is necessary to prepare and install the buffer torsion coil spring separately from the coil winding coil spring, which complicates the structure and the biasing force of the buffer torsion coil spring. Adjustment is also necessary, and workability is poor.

[0004]

SUMMARY OF THE INVENTION In consideration of the above facts, an object of the present invention is to provide a shutter winding device which has a small number of parts, can be installed in a narrow space, and can be easily assembled.

[0005]

[Means for Solving the Problems] Claim 1 according to the present application
The invention described is a support shaft that is bridged over a building frame.
And the shutter that is rotatably supported by this support shaft.
Shutter winding consisting of a winding wheel that winds the main body
In the bending device, one end is connected to the winding wheel and the other end is connected to the winding wheel.
A shutter is connected to the support shaft and is attached to the winding wheel.
Torsional coil spring that gives urging force to the body rising direction
And the torsion coil spring provided on the support shaft
The shutter is guided by a locking member protruding from the middle part of the shutter.
Prevents the locking member from moving during the upward movement of the main body
And a spiral groove.

The invention according to claim 2 of the present application is
The support shaft hung on the structure and this support shuff
Winding wheel that is rotatably supported on the shutter and winds the shutter body.
In the shutter winding device composed of
The locking member protruding from the support shaft and the support shaft
A cylindrical body that is rotatably inserted around the shaft and one end is
The other end of the take-up wheel is connected to the cylinder and the shutter
A first torsion coil spring that applies a biasing force in the body rising direction
And one end connected to the support shaft and the other end connected to the tubular body.
The second that gives a biasing force to the shutter main body ascending direction
A torsion coil spring and the locking member formed on the tubular body
Guided cylinder is rotated to move the shutter body upward.
In the middle of the process, it comes into contact with the locking member to prevent the cylinder from rotating.
And a spiral groove.

[0007]

The shutter winding of the invention according to claim 1 of the present application
In the device, during the ascending stroke of the shutter body
The locking member provided in the middle of the torsion coil spring is the end of the spiral groove.
The contact of the locking part prevents the locking member from rotating.
It This allows one end to be the support shaft and the other end to be the locking member.
The biasing force of the connected torsion coil spring is applied to the winding wheel.
It will not be granted. The invention according to claim 2 of the present application
With the Ming shutter winding device, the shutter body rises
1st torsion coil spring and 2nd torsion in the middle of the stroke
The end of the spiral groove provided in the cylinder that connects the coil spring
By abutting on the locking member protruding from the support shaft,
Therefore, the rotation of the cylinder is prevented. This will support one end
Second torsion coil with the other end connected to the locking member on the shaft
The biasing force of the spring is not applied to the winding wheel.
It Therefore, in any case, raise the shutter body
Biasing force changes in the middle part of the ascending stroke of the shutter body
However, from the middle of the ascending stroke, the hoisting force weakens and the
The force that the lower end of the main body collides with the building frame is not weak.
It

As described above, according to the present invention, since the biasing force of the torsion coil spring for winding the shutter body is changed, it is not necessary to separately provide a buffer spring as in the conventional case. Also
By changing the length of the spiral groove or changing the biasing force of either one of the torsion coil springs, the biasing force of the shutter body in the upward direction can be easily changed.

Further, in the present invention, in addition to the shutter device in which the shutter body is rolled up and then housed, the shutter body is moved horizontally and housed or housed in a folded state. It can be applied to various shutter devices such as.

[0010]

1 and 2 show a shutter winding device 12 to which the present invention is applied.

In this shutter hoisting device 12, a bearing 16 is attached to a support shaft 14 which is fixedly attached to the building frame.
The take-up wheel 18 is axially supported via the. In this embodiment, two winding wheels 18 are used, which are connected to each other by an auxiliary pipe 22. These auxiliary pipes 2
2. The upper end of the shutter body (not shown) is fixed to the winding wheel 18, and the shutter body is wound around the outer periphery of the winding wheel 18 by rotating the winding wheel 18 around the support shaft 14. ing.

One end of a first torsion coil spring 24 is fixed to the winding wheel 18 via a bolt 26.
The middle portion of the first torsion coil spring 24 is the support shaft 14
This support shaft 1 is spaced apart from the outer periphery of
It is wound around 4 times and the other end is joined pipe 28.
It is fixed via a bolt 31. One end of a second torsion coil spring 34 is fixed to the joint pipe 28 with a bolt 32. The second torsion coil spring 34 is wound around the support shaft 14 similarly to the first torsion coil spring 24, and the other end thereof is fixed to the outer periphery of the support shaft 14 with a bolt 36. As a result, the first torsion coil spring 24 and the second torsion coil spring 34
Are connected in series via a joint pipe 28, and the shutter main body is provided with these first torsion coil springs 2
4, urging force in the ascending direction by the second torsion coil spring 34
Is given. In addition, the shutter body is a winding wheel
Attached to the building frame via 18 and support shaft 14.
Has been.

As shown in FIG. 3, the joint pipe 28
Has screw holes 37 and 38 for screwing the bolts 31 and 32 in the radial direction, and further has a fixing screw 4 as a locking member.
Two (FIG. 2) screw holes 43 for screwing are formed in the radial direction.

Next, FIG. 4 shows a second embodiment of the present invention. In this embodiment, the joint pipe 28 to which the first torsion coil spring 24 and the second torsion coil spring 34 are attached has a shaft dimension longer than that of the above embodiment, and a spiral groove 52 is formed in the middle portion thereof. This spiral groove 5
A fixing pin 56, which is a locking member radially implanted in the support shaft 14, is inserted into the support shaft 2.

As shown in FIG. 2, the joint pipe 28
Is inserted into the outer periphery of a spring guide 48 fixed to the outer periphery of the support shaft 14 with bolts 47. A spiral groove 52 is formed in the spring guide 48. This spiral groove 52
The tip of the fixing screw 42 is inserted therein. Therefore, the joint pipe 28 is guided by the fixing screw 42 and moves spirally along the spiral groove 52 when the take-up wheel 18 rotates when the shutter body moves up and down. That is, when the shutter body descends, the fixing screw 42
Moves toward the take-up wheel 18 (direction of arrow A), and conversely, when the shutter body rises, the take-up wheel 1
It moves in the direction away from 8 (direction of arrow B). The movement of the fixing screw 42 in the direction of the arrow B is stopped by coming into contact with the end portion 52A of the spiral groove 52. When the movement of the fixing screw 42 is stopped in this way, the second
Since the biasing force of the torsion coil spring 34 is supported by the support shaft 14 via the spring guide 48, it does not act on the winding wheel 18 and the shutter body. When the torsion coil springs 24 and 32 have the same specifications, the number of rotations of the fixing screw 42 is about half that of the winding wheel 18.

By changing the mounting position of the spring guide 48 to the support shaft 14 and the mounting position of the fixing screw 42 on the joint pipe 28, the rising biasing force changing position of the rising stroke of the shutter body, that is, the second
The rising position where the biasing force of the torsion coil spring 34 does not act can be changed.

In this embodiment, when the first torsion coil spring 24 and the second torsion coil spring 34 are made of a single torsion coil spring, the intermediate portion of the single torsion coil spring is connected to the joint pipe 28. It should be fixed to a part of.

Next, the operation of this embodiment will be described. When the shutter body (not shown) is lowered in the direction of closing the building entrance, the take-up wheel 18 is rotated in accordance with the movement of the shutter body, and the shutter body is taken up by the take-up wheel 1.
Unrolled from 8. At the same time, the take-up wheel 18 has a first torsion coil spring 24 and a second torsion coil spring 34.
Strain energy is accumulated because it elastically deforms.
In this case, the fixing screw 42 is attached to the end portion 52 along the spiral groove 52.
Move in a direction away from A (direction of arrow A).

On the contrary, when the shutter body is raised, the shutter body is wound around the winding wheel 18, and the first torsion coil spring 24 and the second torsion coil spring 34 release the accumulated strain energy. The shutter body can be raised with a light force. The fixing screw 42 contacts the end portion 52A of the spiral groove 52 during the ascending stroke. Therefore, since the biasing force of the second torsion coil spring 34 is not transmitted to the winding wheel 18, the biasing force of only the first torsion coil spring 24 serves to assist the lifting force of the shutter main body, and the end of the upward stroke of the shutter main body. In the vicinity of the part, the rising spring force is reduced, and the problem of a strong collision with the building frame is avoided.

In the above embodiment, the biasing forces acting on the shutter body by the first torsion coil spring 24 and the second torsion coil spring 34 may be equal, but one of them is made stronger or weaker than the other. You can also

Next, FIG. 4 shows a second embodiment of the present invention. In this embodiment, the joint pipe 28 to which the first torsion coil spring 24 and the second torsion coil spring 34 are attached has a shaft dimension longer than that of the above embodiment, and a spiral groove 52 is formed in the middle portion thereof. This spiral groove 5
A fixing pin 56, which is a fixing member radially implanted in the support shaft 14, is inserted into the support shaft 2.

Therefore, in this embodiment, contrary to the above-described embodiment, the spiral groove 52 rotates as the shutter body moves up and down, and moves relative to the fixed pin 56. However, as in the above-described embodiment, when the fixing pin 56 comes into contact with the end portion 52A in the intermediate portion of the upward movement of the shutter body, the second torsion coil is formed.
Since both ends of the spring 34 are fixed to the support shaft 14, only the biasing force of the first torsion coil spring 24 acts on the shutter main body, and the winding biasing force can be changed from the middle as in the above-described embodiment.

Next, FIG. 5 shows a third embodiment of the present invention. In this embodiment, two coil springs 62 and 63 are attached to the outer periphery of the support shaft 14 at their ends, respectively.
By being fixed by 4 (in FIG. 5, the mounting bolt on the back side of the drawing overlaps with the mounting bolt 64 on the front side), a spiral groove is substantially formed. That is, the coil spring 62
And the coil spring 63 each have pitches at equal intervals, and a two-row helical structure in which the other coil spring enters between the pitches, the coil length of the coil spring 62 is longer than that of the coil spring 63. Between the tip portion 63A of the coil spring 63 and the tip portion 62A of the coil spring 62, the coil spring 62 substantially forms a spiral groove 52 that accommodates the fixing screw 42 between the coil wires. The joint pipe 28 is arranged outside the coil diameters of the coil springs 62 and 63 and is movable coaxially with the support shaft 14.

Therefore, also in this embodiment, the operation of the joint pipe 28 and the spring fixing screw 42 is the same when the shutter body is moved up and down, and the fixing screw 42 contacts the coil spring tip 63A forming the end of the spiral groove. This prevents the spring biasing force of the second torsion coil spring 34 from acting on the shutter body.

In this embodiment, it is not necessary to form the spiral groove 52 in the joint pipe 28 by machining as in the first and second embodiments, so that the manufacturing is facilitated.

The spiral groove 52 of FIG. 2 formed in the first embodiment is not limited to the structure of penetrating the inside and outside of the joint pipe 28, and may be a bottomed groove. Further, the structure is not limited to the spiral groove forming structure as in each of the above-mentioned embodiments, and a combination of a nut and a screw such as a bolt may be used to combine the spiral groove and the fixing member. Furthermore, the number of torsion coil springs is limited to two.
However, it may be three or more.

[0026]

Since the present invention has the above-mentioned structure, it has an excellent effect that a shutter winding device having a smaller number of parts than the conventional structure and capable of being installed in a narrow space can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing a shutter winding device to which a first embodiment of the present invention is applied.

FIG. 2 is an enlarged cross-sectional view showing a part of FIG.

FIG. 3 is a side view showing a joint pipe used in the first embodiment.

FIG. 4 is an enlarged sectional view showing a shutter winding device according to a second embodiment of the present invention.

FIG. 5 is an enlarged sectional view showing a shutter winding device according to a third embodiment of the present invention.

[Explanation of symbols]

 12 Shutter hoisting device 24 First torsion coil spring 34 Second torsion coil spring 34 42 Fixing screw 48 Spring guide 52 Spiral groove 52A End 56 Fixing pin 62 Coil spring 63 Coil spring

Claims (2)

[Claims] 1. A support shaft laid over a building frame.
And the shutter that is rotatably supported by this support shaft.
Shutter winding consisting of a winding wheel that winds the main body
In the bending device, one end is connected to the winding wheel and the other end is connected to the winding wheel.
A shutter is connected to the support shaft and is attached to the winding wheel.
Torsional coil spring that gives a biasing force to the body rising direction
And the torsion coil spring provided on the support shaft
The shutter is guided by a locking member protruding from the middle part of the shutter.
Prevents the locking member from moving during the upward movement of the main body
Shutter winding, characterized by having a spiral groove
apparatus. 2. A support shaft spanning a building frame.
And the shutter that is rotatably supported by this support shaft.
Shutter winding consisting of a winding wheel that winds the main body
In the lifting device, the locking protruding from the support shaft
A member and a rotatably inserted outer periphery of the support shaft.
The cylinder is connected to the winding wheel at one end and to the cylinder at the other end.
It is tied and gives a biasing force in the upward direction of the shutter body.
1 torsion coil spring, one end on the support shaft and the other end
Is connected to the cylinder and urged in the upward direction of the shutter body
Second torsion coil spring for applying force and formed on the cylindrical body
Then, the cylinder is rotated by being guided by the locking member and the chassis is rotated.
During the ascending stroke of the main body, the cylinder comes in contact with the locking member.
And a spiral groove for preventing rotation of the body,
Shutter winding device.