JP3250163B2 - Winding drum in architectural shutter - 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 drum for an architectural shutter built at an opening of a building or the like.

[0002]

2. Description of the Related Art In general,
In this type of architectural shutter, a shutter curtain is wound around a winding drum in a spiral shape, and a balance elastic machine is interposed between the winding drum (winding wheel) and the skeleton side. The more the shutter curtain is rotated to the side where the shutter curtain is extended, the more the energy is accumulated, and the accumulated energy balances the own weight of the shutter curtain extended to the opening.

[0003] In such a balanced-type architectural shutter, the dead weight of the fed-out shutter curtain acts on the winding drum as a rotational moment at the feeding end position of the shutter curtain. In such a case, this rotational moment is theoretically determined by the product of the weight of the unfolded shutter curtain and the winding diameter of the curtain unwinding position (the distance from the center of the winding drum to the curtain unwinding position). become. And if the thickness of the shutter curtain is as thin as a sheet and the change in winding diameter is negligible,
The rotational moment changes (linearly) while being substantially linearly proportional to the amount of extension of the shutter curtain, and the stored force of the balance elastic machine changes while being linearly proportional to the amount of rotation of the drum. In response to this, a balance elastic machine having an elastic coefficient corresponding to a change in the rotational moment acting on the weight of the fed shutter curtain may be used.

[0004] However, the actual shutter curtain has an interlock section for connecting the slats.
In fact, it is a fact that a reasonably thick one is used in relation to wind pressure resistance, crime prevention, heat insulation, etc., and in such a case, for example, when moving from the first volume to the second volume, and again from the second volume The winding diameter changes greatly when moving to the third volume, and therefore, the rotating moment due to the fed-out shutter curtain does not change linearly, as shown in FIG.
It changes with a periodic increase and decrease. In addition, in the case of the balance type, when the curtain is fully closed (when the number of rotations of the winding drum is zero), the rotational moment of the fed-out shutter curtain is substantially balanced with the rotational moment of the balance elastic machine due to the accumulated force. When fully closed when set to, the balance armature wins, the shutter curtain seat plate lifts naturally from the floor, and the rotational moment wins, so it is necessary As described above, it is necessary to take care that the shutter curtain is not extended and the shutter curtain is not wavy.

[0005] For this reason, when selecting a balanced ammunition, as shown in FIG. 5, the conventional one has to adopt a medium which changes moderately with respect to the periodic increase and decrease of the rotational moment. In such a case, when trying to release from the fully closed state, the rotational moment of the winding drum acts more than the energy stored in the balance armature, so that the operating force immediately after lifting from the fully closed state becomes heavy. In addition to the light opening operation being hindered, when the shutter is fully closed, there is a problem in that the rotating moment of the shutter curtain fed out immediately before the fully closing wins, the descent of the shutter curtain is accelerated, and the shutter curtain is closed with a shock. .

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made with the object of providing a winding drum in an architectural shutter capable of eliminating these drawbacks. In an architectural shutter including a winding drum for spirally winding a shutter curtain that opens and closes an opening, the drum diameter of the winding drum is set at a value from the winding drum when the curtain is fully closed. The diameter line passing through the curtain feeding position becomes the major axis
An elliptical or elliptical shape is set. The present invention also relates to a constructional shutter comprising a winding drum for spirally winding a shutter curtain for opening and closing an opening, wherein the diameter of the winding drum is set to be equal to the curtain of the winding drum. An elliptical or elliptical shape in which the diameter passing through the connection position is a short diameter and the diameter passing through a position rotated by about 90 degrees from the curtain connection position is the long diameter, is set. Still further, the present invention provides an architectural shutter comprising a winding drum for spirally winding a shutter curtain for opening and closing an opening, wherein the winding drum has a curtain connection position where the curtain is completely closed. In the closed state, it is assumed to be set so as to be substantially at the top of the drum, and the diameter of the take-up drum is a short diameter at the diameter passing through the curtain connection position.
The present invention is also characterized in that a diameter line passing through a position rotated by approximately 90 degrees from the curtain connection position is set to an elliptical or elliptical shape having a long diameter.

According to the present invention, the operation force immediately after lifting of the shutter curtain from the fully closed state is reduced by this configuration, so that the opening operation can be performed lightly.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a shutter to be installed at an opening of a building, and the shutter 1 includes a guide rail 2 erected on both right and left sides of the opening,
Shutter 3 that moves up and down to open and close the opening by being guided up and down, a winding drum 4 that winds the shutter curtain 3 in a spiral shape, a shutter case 5 that houses the winding drum 4, and the shutter. A take-up shaft 6 fixed to the case 5 and rotatably supporting the take-up drum 4; interposed between the take-up shaft 6 and the take-up drum 4; As is the case with the prior art, it is composed of a member such as the balance elastic machine 7 which accumulates energy as it rotates to the side where the 3 is extended.

The winding drum 4 is integrally connected to the base end of the shutter curtain 3. The curtain connecting position A of the winding drum 4 is
Is set to be substantially at the top of the drum when is fully closed. Further, the winding drum 4 has an elliptical shape instead of a perfect circular shape, and its drum diameter is such that a diameter line X passing through the curtain connection position A is a short diameter and the curtain connection position A
A diameter line Y passing through a position rotated by approximately 90 degrees from the position, that is, a curtain feeding position B from the winding drum 4 when the shutter curtain is fully closed, has a long diameter (L is the long diameter, and S is the short diameter). Then, L> S) is set. When the shutter curtain 3 is fully closed, the stored momentum of the balance armature 7 is determined by the rotational moment acting on the wound curtain 4 in the curtain feeding direction with respect to the winding drum 4 and the balance momentum. 7 is set such that the accumulating force of 7 acts on the winding drum 4 and the rotational moment acting in the curtain winding direction is substantially balanced.

Now, in the shutter configured as described above, the rotational moment by the shutter curtain 3 is represented by F,
The rotational moment due to the accumulated force of the balance elastic machine 7 is f, the own weight of the fed-out shutter curtain 3 is W, the thickness of the shutter curtain 3 is T, the winding diameter of the shutter curtain 3 (the center position of the winding drum 4). C is the distance from O to the feeding position B, and the winding drum 4 at the feeding position B
Is the radius of D, when the shutter curtain 3 is fully closed (when the rotation speed of the winding drum 4 is zero), the winding diameter C
Is the sum of the radius D of the winding drum 4 and the length T / 2 corresponding to half the thickness of the shutter curtain 3 (C ≒ D +
T / 2), the rotational moment F of the shutter curtain 3 at this time is equal to the product [F of the unwound weight W of the unfolded shutter curtain 3 and the winding diameter C.
≒ W × (D + T / 2)], and the rotational moment F and the rotational moment f due to the accumulated force of the balance armature 7 are substantially balanced in the fully closed state (F ≒ f). In the fully-closed state, the winding drum 4 has a major diameter passing through the curtain feeding position B, and D = L.
When the shutter curtain 3 is lifted from the fully closed state, as shown in FIG. 4, the rotational moment f due to the accumulated force of the balance armature 7 decreases (linearly) while being linearly proportional to the amount of rotation. During the period from the fully closed state until the winding drum 4 rotates 1/4 turn, the rotational moment F by the shutter curtain 3 is changed.
The radius D of the winding drum 4 at the feeding position B changes with a decrease from the major axis L to the minor axis S with the decrease of the own weight of the winding drum. As shown in FIG. 4, the rotational moment F due to the shear-to-curtain 3 is smaller than the rotational moment f due to the energy storage device 7 (F <f). Become.

On the other hand, until the winding drum 4 rotates from 取 り rotation to 回 転 rotation, the radius D of the winding drum 4 at the feeding position B changes from the short diameter S to the long diameter L side. Therefore, the rotational moment F caused by the sheer curtain 3 gradually increases due to the accumulated force.
, And at the point of time when the rotation is substantially halved, the rotation moment F by the shear-to-curtain 3 and the rotation moment f by the energy storage device 7 substantially match (F ≒ f). Further, during the period from 1/2 rotation to 3/4 rotation of the winding drum 4, since the shutter curtain 3 becomes the second winding in 3/4 rotation, the winding diameter C gradually increases (winding diameter C Becomes C ≒ D + 3T / 2 in 3/4 rotation), and accordingly, the rotational moment F due to the shear-to-the-curtain 3 becomes larger than the rotational moment f due to the energy storage device 7. In this case, Since the radius D of the winding drum 4 at the time of ／ rotation is the short diameter S, the state where the increase in the winding diameter C is suppressed and the rotational moment F by the sheer curtain 3 is charged It is configured such that it does not become much larger than the rotational moment f by the machine 7.

In the embodiment of the present invention constructed as described above, when the shutter curtain 3 is fully closed, as described above, the rotational moment F by the extended shutter curtain 3 and the energy storage of the balance elastic machine 7 are provided. The rotation moment f due to the force is in a state of being substantially balanced, but when the shutter curtain 3 is lifted from this fully closed state, until the winding drum 4 is rotated about 1/2 turn from the fully closed state, The rotational moment f in which the energy stored in the balance elastic machine 7 acts on the winding drum 4 in the curtain winding direction,
The fed-out shutter curtain 3 acts on the winding drum 4 more than the rotational moment F acting in the curtain feeding-out direction, and the shutter curtain 3 is in an upright state. As a result, the operation force immediately after lifting from the fully closed state can be lightened, and thereafter, the sheer curtain 3 can be opened lightly because of the smooth rise due to inertia. on the other hand,
In the case where the shutter curtain 3 is closed, the rotational moment f by the balance elastic machine 7 is superior at the stage immediately before the full closing, and the rotation by the shutter curtain 3 that is fed just before the full closing as in the related art. Thus, it is possible to effectively avoid a problem that the moment F wins and the descent of the shutter curtain 3 is accelerated and the shutter curtain 3 is closed impulsively.

In addition, when the shutter curtain 3 is wound and rewound on the winding drum 4, for example, when moving from the first winding to the second winding, or when moving from the second winding to the third winding, When the winding diameter increases or decreases, the winding diameter greatly changes. In the embodiment, the winding drum 4 has an elliptical shape, and the diameter line passing through the feeding position when the winding layer increases or decreases is a short diameter. Therefore, the change in the winding diameter is suppressed, and the shutter curtain 3
Therefore, there is an advantage that the change of the rotational moment F due to the rotation can be made as linear as possible.

It should be noted that the present invention is not limited to the above embodiment, and the shape of the winding drum may be an elliptical shape. Further, the curtain from the winding drum when the curtain is fully closed may be used. If the diameter line passing through the feeding position is formed in an elliptical or elliptical shape having a long diameter, the effect is obtained that the operating force immediately after lifting from the fully closed state is reduced. Incidentally, the appropriate value of the difference between the length of the major axis and the minor axis of the winding drum is determined in consideration of various conditions such as the thickness and weight of the shutter curtain, the drum diameter of the winding drum, and the like. The differences shown in the figures are not all.

[0015]

In summary, since the present invention is constructed as described above, the winding drum is an ellipse whose major axis passes through the curtain feeding position from the winding drum when the curtain is fully closed. Or, when the shutter curtain is in an oval shape and the shutter curtain in the fully closed state is opened, the change in the rotation moment of the winding drum based on the curtain's own weight due to the fed-out shutter curtain decreases the winding diameter of the winding drum. And a decrease accompanied by a downwardly convex moment change. As a result, when the shutter curtain is lifted from the fully closed state in a case where the rotational moment corresponding to the accumulating force of the balance armature at the time of full closing and the rotating moment based on the curtain own weight are set to be balanced. In addition, the rotational moment due to the curtain's own weight that changes in the downwardly convex state is inferior to the rotational moment due to the balance elastic machine that changes in a substantially linear manner, so that the lifting operation force from the fully closed state can be reduced. Thus, the sheer curtain can be easily opened. On the other hand, in the case where the shutter curtain is closed, the rotational moment due to the balance elastic machine wins at the stage immediately before full closing, and the rotational moment due to the conventional weight of the curtain wins, and the descending speed of the shutter curtain is accelerated. In addition, it is possible to effectively avoid the occurrence of a problem such as a shock-like closing, and to perform a quiet closing.

Further, in the case where the diameter line passing through the curtain connection position of the winding drum is set to be a short diameter,
Since the change in the winding diameter when the winding layer increases or decreases is suppressed, there is an advantage that the change in the rotational moment due to the shutter curtain can be made as linear as possible.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a shutter.

FIG. 2 is a side sectional view of a winding drum.

FIGS. 3 (A), (B), (C), and (D) are explanatory views showing a winding state of a first turn of a shutter curtain.

FIG. 4 is a graph showing a rotational moment acting on a winding drum.

FIG. 5 is a graph showing a rotational moment acting on a winding drum in a conventional example.

[Explanation of symbols]

 3 Shutter curtain 4 Winding drum

Claims (3)

(57) [Claims] 1. An architectural shutter comprising a winding drum for spirally winding a shutter curtain for opening and closing an opening, wherein a diameter of the winding drum is in a fully closed state of the curtain. Oval or ellipse whose major axis passes through the curtain unwinding position from the take-up drum
A winding drum for an architectural shutter characterized by having a shape set. 2. An architectural shutter comprising a winding drum for spirally winding a shutter curtain for opening and closing an opening, wherein a diameter of the winding drum is determined by connecting a curtain of the winding drum to the curtain. A winding drum for an architectural shutter, wherein a diameter line passing through the position is a short diameter, and a diameter line passing through a position rotated by about 90 degrees from the curtain connection position is set to be an ellipse or an oval shape having a long diameter. 3. An architectural shutter comprising a winding drum for spirally winding a shutter curtain that opens and closes an opening, wherein the winding drum has a curtain connection position in a fully closed state of the curtain. The winding diameter of the take-up drum was rotated by approximately 90 degrees from the curtain connection position, with the diameter of the winding passing through the curtain connection position being a short diameter and the drum diameter being short. A winding drum for an architectural shutter, wherein a diameter line passing through the position is set to an elliptical or elliptical shape having a long diameter.