JPH0723511Y2 - 3-axis shutter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a shutter device, in particular, a guide shaft for guiding to a guide rail of the shutter in addition to a take-up shaft, and a support shaft disposed between these two shafts. The present invention relates to a shutter device.

(Prior Art) FIG. 2 is a schematic cross-sectional view of a conventionally used shutter device. The shutter 1 is wound around a winding shaft 2 to open and close the frontage. A guide rail 3 is provided along the vertical direction, and a guide shaft 4 is provided to guide the shutter 1 on the guide rail 3. That is,
The guide shaft 4 is located above the guide rail 3, and the shutter 1 is wound around the winding shaft 2 through the guide shaft 4. Further, the winding shaft 2 is arranged at substantially the same height as the guide shaft 4, and by setting both shafts in such a layout, it is possible to install in a low space above the ceiling. However, when both shafts are provided at substantially the same height, and when the diameter of the shutter 1 wound around the take-up shaft 2 is particularly small, the length L of the shutter 1 that straddles the two shafts becomes large, and due to its own weight. Bends downward. If the diameter of the shutter 1 is increased due to the winding of the shutter 1, it is partially supported along the outer circumference of the wound shutter 1, so that the amount of deflection is slightly reduced, but the slats 5, 5 ... The bending direction of the joint portion due to this flexure is opposite to the bending direction when winding around the winding shaft 2. Therefore, it goes without saying that the fitting portion of each slat 5 is overloaded.
When the slat 5 that is forcibly bent in the opposite direction is wound around the winding shaft 2, the slat 5 is bent back and a creaking noise is generated. At the same time, the winding torque becomes large, and it becomes difficult for the winding shaft 2 to be wound around, and as a result, opening and closing operations of the shutter become difficult.

(Object of the Invention) As described above, when the winding shaft is installed at substantially the same height as the guide shaft for guiding the shutter to the guide rail, the above problems occur. Therefore, the present invention is a technology developed for the purpose of solving this problem, in which both shafts are installed at the same height in a low ceiling space, preventing the shutter from flexing between the two shafts, and it is quiet and smooth. Provided is a shutter device capable of performing various opening / closing operations.

(Structure of the present invention) Since the shutter device of the present invention can be installed in a low space above the ceiling, the guide shaft and the winding shaft are installed at substantially the same height. A support shaft is arranged between the guide shaft and the take-up shaft, and the intermediate region of the shutter extending between the two shafts is supported by the support shaft to prevent bending. However, arranging the support shaft at almost the same height as both shafts is no different from the case where the distance between the guide shaft and the take-up shaft is shortened.If the winding diameter of the shutter becomes smaller, A shutter suspended between the take-up shafts causes the same bending phenomenon. Therefore, the support shaft is arranged at a position higher than both shafts to some extent, and as a result, the shutter suspended between the guide shaft and the support shaft and the shutter suspended between the support shaft and the take-up shaft are not horizontal. Instead, it is hung on the support shaft in an inclined state from side to side. Therefore, when the shutter is slanted and suspended, the self-weight acting vertically downward has a force dispersed in the direction perpendicular to the longitudinal direction of the shutter, and the above-mentioned vertical component force exhibiting a bending action is relatively small. Further, by disposing the support shaft upward, the distance between the guide shaft and the winding shaft can be shortened, and the present invention is a shutter device aiming at the effects obtained from both of them.

Hereinafter, an embodiment of a triaxial shutter device according to the present invention will be described in detail with reference to the drawings.

(Embodiment) FIG. 1 is an embodiment of a three-axis type shutter device according to the present invention, in which a shutter 1 wound around a winding shaft 2 is shown.
Are guided to the guide rail 3 through the support shaft 6 and the guide shaft 4. Needless to say, the shutter 1 is composed of a plurality of slats 5, 5, ... Connected to each other through a fitting portion. The shutter 1 itself has no characteristic and the conventional shutter 1 If The shutter 1 is wound around the winding shaft 2 to open and close the front, and the winding shaft 2 is connected to the drive motor 7 via the chain 8. The shutter 1 is moved up and down by being guided by guide rails 3 installed vertically on both sides of the frontage, and the guide shaft 4 allows the shutter 1 to be guided to the guide rails 3. It is provided at an appropriate position. Here, the guide shaft 4 is a metallic rotating cylinder body having a constant outer diameter and a length corresponding to the width of the shutter 1. Therefore, when the shutter 1 comes into contact, a contact sound is generated. A buffer ring may be attached to the outer circumference of the guide shaft 4 in order to eliminate contact noise. The same applies to the support shaft 6 pivotally supported between the guide shaft 4 and the winding shaft 2.

By the way, as shown in FIG. 1, the support shaft 6 is disposed at a position higher than both the shafts 4 and 2, and the shutter 1 projects with the support shaft 6 as an apex, and the front and rear sides of the support shaft 6 (left and right in FIG. 1). The side) is slanted and suspended. The self-weight W of the shutter 1 which is thus slanted and hung is as follows:
Is decomposed into a horizontal component W _H and a vertical component W _{V in} the longitudinal direction of W
Since> W _V , the deflection of the shutter 1 is reduced by tilting even if the hanging distance is the same. Similarly, the amount of deflection of the shutter 1 suspended between the support shaft 6 and the take-up shaft 2 also decreases.

Moreover, since the support shaft 6 is supported above the guide shaft 4 and the winding shaft 2, the distance between the guide shaft 4 and the supporting shaft 6 and the distance between the supporting shaft 6 and the winding shaft 2 are inevitably shortened. To be done.

As described above, in the shutter device according to the present invention, the support shaft is supported between the guide shaft and the winding shaft, and the support shaft is arranged above the guide shaft and the winding shaft. The following effects can be obtained.

(Effect) (1) In the shutter device of the present invention, by disposing the support shaft between the guide shaft and the winding shaft, it is possible to reduce the amount of deflection of the shutter suspended between the shafts. For this reason, the bending of each slat fitting portion forming the shutter is extremely small, and the stat bending caused by the bending when winding around the winding shaft is not returned, so that a smooth opening / closing operation can be performed. That is, no squeaking noise is generated in the fitting portion when the bending is returned, and the torque required for winding is reduced.

(2) Further, not bending the shutter does not force the fitting portion as described above, which can improve the durability of the shutter itself.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a shutter device according to the present invention.
FIG. 2 shows a conventional shutter device. 1 ... Shutter, 2 ... Winding shaft, 3 ... Guide rail, 4 ...
Guide shaft, 5 ... Slat, 6 ... Support shaft, 7 ... Motor, 8 ...
chain.

Claims (2)

[Scope of utility model registration request] 1. A shutter device comprising a guide shaft for guiding a shutter to a guide rail and a shutter take-up shaft installed at substantially the same height as the guide shaft in a space above the ceiling.
A three-axis shutter device in which a supporting shaft is supported between the guide shaft and the winding shaft, and the height of the supporting shaft is higher than that of the guiding shaft and the winding shaft. 2. A triaxial shutter device according to claim 1, wherein the outer diameter of the support shaft is smaller than that of the guide shaft.