JP2699897B2 - Curtain opening and closing 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 curtain opening / closing device which is used for an opening of a building such as a house, for example, a ventilation opening or a lighting window, and closes the opening of the building.

[0002]

2. Description of the Related Art An opening provided in a wall of a building such as a house is provided as a ventilation port or a lighting window, and a shutter curtain, a roll screen, and the like are provided for the purpose of shading the opening. However, such a mechanism that opens and closes a shutter curtain or a roll screen provided in a building opening is provided below the opening depending on the position where the opening is formed, and is configured to be closed by raising the shutter curtain, That is, a lifting shutter device is installed.

Heretofore, this type of pull-up type shutter device has a winding case for winding up a slat curtain supported on a shutter case arranged below a building opening, and the slat curtain is attached to the winding shaft. Is wound up or rewinded, and
A take-up reel is rotatably supported on a support shaft arranged in parallel with the take-up shaft, and the take-up reel is attached in one rotation direction by a torsion coil spring interposed between the take-up reel and the support shaft. The pulling line wound around the take-up reel is U-turned through a pulley disposed above the shutter opening, guided downward, and connected to the upper edge of the slat curtain. Are known.

[0004] In the same manner as described above, a shutter is wound around a shaft arranged below the opening of the building, the shutter is hung upward by a winding string, and the winding and rewinding of the winding string are performed. In addition to raising and lowering the shutter to open and close it, the mechanism in which a balancer is connected to both the left and right ends of the upper edge of the shutter via ropes and pulleys to maintain the horizontal balance during the vertical movement of the shutter, etc. No. -122891.

[0005]

However, in the above-mentioned conventional opening / closing mechanism, when the slat curtain is raised and closed by the former mechanism, the self-weight of the slat curtain increases due to the rise, and the slat curtain is rewound. The spindle that rotates by this, by this rotation,
The drawback is that the spring will be tightened and this increased spring torque will synergistically increase the lifting force of the slat curtain, i.e. the slat curtain will rise as it approaches the closed state. There was a problem that the force to be increased.

In the latter mechanism of the conventional opening and closing mechanism described above, a balancer is provided to assist the ascending and descending movement of the shutter and to elevate and lower the shutter so that the shutter always keeps horizontal without tilting. Since the balancer must be always suspended in the vertical direction, the position where the shutter having the opening / closing mechanism is installed is limited to only the vertical wall of the building. Have.

In order to solve the above-mentioned problems, the present invention makes it possible to smoothly rotate the winding shaft for winding and rewinding the curtain, and to smoothly open and close the curtain. It is an object of the present invention to provide a curtain opening and closing device that can perform stable opening and closing regardless of a position where the curtain is installed, such as an inclined roof surface.

[0008]

Next, means for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The curtain opening / closing device 1 of the present invention includes a shaft 4 which is located on one side of a building opening 15 and is disposed along the one side, and both ends 4a of which are rotatably supported.
Is rotatably provided by being externally inserted around the outer periphery of the opening 1.
A winding shaft 2 that winds a curtain 3 that closes 5;
One end 3a of the curtain 3 is connected to the curtain 3
A guide line 10 for guiding the opening and closing of the guide line, and a guide line 10 arranged coaxially with the winding shaft 2 and fixed to the shaft 4 and rotated in the same direction as the rotation direction of the winding shaft 2. Take-up pulley 9 for taking up and rewinding the guide wire 1
A guide means 11 for guiding the shaft 4 to the winding pulley 9, and a space between the shaft 4 and the winding shaft 2 in the radial direction, which is interposed on the outer periphery of the shaft 4, and A biasing member 12 for always exerting a biasing force in a constant rotation direction regardless of the rotation direction of the shaft 2 to impart tension to the curtain 3 and the guide rope 10. The opening and closing operation is performed by moving the.

Further, the winding diameter of the winding shaft 2 may be set to be larger than the winding diameter of the winding pulley 9.

[0010]

When the opening 15 of the building is closed by the curtain 3, the curtain 3 wound around the winding shaft 2 is pulled out in the closing direction by grasping one edge 3a of the curtain 3 or the like. The winding shaft 2 rotates with respect to the shaft 4, and at the same time, the shaft 4 rotates following the urging member 12. At this time, the urging member 12 rotates the shaft 4 while the urging force is applied. Thereby, the winding pulley 9 rotates, and the guide cable 10 connected to the curtain 3 is wound.

When the curtain 3 is opened, the curtain 3
The curtain 3 is moved in the opening direction by grasping and holding one edge 3a of the curtain 3. The movement of the curtain 3 causes the guide rope 1
0 is towed, and is sequentially rewound from the winding pulley 9 via the guide means 11. The rotation of the winding pulley 9 causes the shaft 4 to rotate, and at the same time, the winding shaft 2
Follow and rotate. At this time, the urging member 12 rotates the winding shaft 2 with the urging force acting. Thus, the curtain 3 is wound around the winding shaft 2. Since the urging force of the urging member 12 interposed between the shaft 4 and the winding shaft 2 is always working,
The curtain 3 and the guide rope 10 do not loosen under tension.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the curtain opening / closing device according to the present invention will be specifically described below. Curtain opening and closing device 1 of the present embodiment
As shown in FIGS. 1 and 2, a winding shaft 2 is disposed below an opening 15 formed in a vertical wall surface of a building, and a slat curtain 3 as a curtain is suspended from above. A description will be given as a pull-up shutter device for raising and lowering the slat curtain 3.

First, as shown in FIGS. 1 and 2, a shaft 4 for rotatably supporting the winding shaft 2 is provided with a pair of brackets disposed on both left and right sides below a building opening 15. The brackets 5 are horizontally hung between the brackets 5, and both ends 4 a are rotatably supported and attached to bearings 5 a protruding from the inner surface of each bracket 5.

As shown in FIG. 2, the winding shaft 2 has a disk-shaped adapter 6 having a through hole 6a rotatable with respect to the shaft 4, and has the same outer diameter as the adapter 6. Similarly to this adapter 6, it is composed of a cylindrical spacer 7 rotatable with respect to the shaft 4, and a connecting rod 8 for connecting the adapter 6 and the spacer 7, and a suspension (not shown) is provided on the outer periphery. The slat curtain 3 is connected and wound through the slat curtain 3.

As shown in FIG. 1, winding pulleys 9, 9 are fixedly provided at both ends 4a of the shaft 4 located at both ends of the winding shaft 2. These winding pulleys 9,
One end of each of the guide ropes 10 made of a wire or the like is fixed to 9, and the guide ropes 10 are wound up and rewinded.

The winding direction of the guide cable 10 wound on the winding pulley 9 is opposite to the winding direction of the slat curtain 3 of the winding shaft 2. The outer diameter of the winding portion around which the 9 guide ropes 10 are wound is set and formed so as to be smaller than the outer diameter of the winding shaft 2.

The other ends of the guide wires 10 are connected and fixed to the left and right ends of one end 3a, which is the uppermost edge of the slat curtain 2, respectively.

As shown in FIG. 1, each of the guide ropes 10 is guided by guide means 11 including a plurality of guide pulleys disposed on a skirting board or the like constituting the building opening 15, as shown in FIG.
Between the slat curtain and one end edge 3a of the building opening 15
It is bridged through the upper side.

A torsion coil spring 12 as an urging member is interposed between the shaft 4 on which the winding pulley 9 is fixed and the adapter 6 of the winding shaft 2.
As shown in FIG. 2, the torsion coil spring 12 has one end 12a fixed to the shaft 4 and wound around the shaft 4, and the other end 12b fixed to the plate surface of the adapter 6. ing.

The torsion coil spring 12 is attached by being twisted a predetermined number of times in advance, and the adapter 6 that is rotatable with respect to the shaft 4, that is, the winding shaft 2, is always attached to the shaft 4. An urging force acts so as to rotate in a certain direction.

The direction in which the biasing force acts is independent of the rotational direction of the shaft 4 and the adapter 6 (the winding shaft 2).
The guide cable 10 and the slat curtain 3 connecting the shaft and the winding shaft 2 are always kept in tension, that is, the torsion coil spring 12 generates a rotational force to rewind the shaft 4. The guide shaft 10 is wound around the winding pulley 9 of the shaft 4 so as to rotate the winding shaft 2 in a direction opposite to the winding direction.

On the left and right sides of the building opening 15,
As shown in FIG. 1, a guide rail 13 for guiding the slat curtain 3 up and down is provided.
A storage unit (not shown) for storing the slat curtain 3 wound around the winding shaft 2 is provided below the storage shaft 2.

Next, the operation of the pull-up type shutter device 1 as the curtain opening / closing device configured as described above will be described. First, when the slat curtain 3 is fully opened or fully closed, or when the slat curtain 3 is at an intermediate position and stopped, the slat curtain 3 and the winding pulley wound on the winding shaft 2 are used. Since the guide cable 10 wound around 9 is always biased by the action of the torsion coil spring 12 in the winding direction, the slat curtain 3 and the guide cable 10 are always in tension. State, and holds this stopped state.

Next, below the building opening 15, from the fully opened state in which the slat curtain 3 is completely wound around the winding shaft 2 (see FIG. 3) or the state where the slat curtain 3 is stopped halfway, in the closing direction. In other words, when the slat curtain 3 is lifted, the slat curtain 3 is lifted by grasping the upper end 3a of the slat curtain 3 or the like. When the slat curtain 3 is raised (arrow S in FIG. 3), the slat curtain 3 is wound from the winding shaft 2. Then, the winding shaft 2 rotates with respect to the shaft 4 while moving upward along the guide rail 13, whereby the torsion coil spring 12 is tightened with respect to the shaft 4.

The tightening of the torsion coil spring 12 is performed as follows.
An urging force is generated to cause the torsion coil spring 12 to loosen (rewind) to the initial torsion state, and the shaft 4 follows the rotation of the winding shaft 2 and rotates. The guide cable 10 which starts to descend (arrow D) at the same time as the raising (arrow S) of the slat curtain 3 is wound around the winding pulley 9 by the rotation of the shaft 4.

At this time, there is a difference in rotation between the winding shaft 2 and the winding pulley 9 having different outer diameters.
2 will absorb this. The absorption of the rotation difference by the torsion coil spring 12 is such that the amount of tightening of the torsion coil spring 12 by rotation of the winding shaft 2 larger than the winding pulley 9 is A, and the torsion by rotation of the winding pulley 9 is A. Assuming that the unwinding amount of the torsion coil spring 12 is B and the predetermined number of pre-twisting times of the torsion coil spring 12 is the initial number of torsion, the relationship is (AB) <(initial number of torsion). Thus, the torque generated by the torsion coil spring 12 constantly applies tension to the slat curtain 3 and the guide cable 10, and the slat curtain 3 is opened and closed without loosening.

Next, from the fully closed state in which the building opening 15 is closed by the slat curtain 3 (see FIG. 4) or the state in which it is stopped halfway, the slat curtain 3 is lowered (FIG. 4). 4 In the case of the middle arrow O), the upper end 3a of the slat curtain 3 is lowered by grabbing, etc.
When the slat curtain 3 is lowered (arrow O), the slat curtain 3 moves down along the guide rail 13, and the guide rope 10 connected to the slat curtain 3 is pulled, and the winding pulley 9 rotates. It is rewound and fed out (arrow U). Then, the shaft 4 rotates with respect to the winding shaft 2 by the rotation of the winding pulley 9, whereby the torsion coil spring 12 is tightened around the winding shaft 2.

The torsion of the torsion coil spring 12 is as follows.
The torsion coil spring 12 generates an urging force to wind and loosen (rewind) to the initial torsion state,
The take-up shaft 2 follows the rotation of the shaft 4 and rotates, and the guide rope 10 which starts rising (arrow U) by lowering (arrow O) of the slat curtain 3 is wound by the rotation of the shaft 4. The slat curtain 3 which is unwound from the take-off pulley 9 and simultaneously descends on the take-up shaft 2 which is rotated by this urging force is taken up.

At this time, a difference in rotation occurs between the winding shaft 2 and the winding pulley 9 having different outer diameters in the same manner as when the slat curtain 3 is raised, but the torsion coil spring 12 absorbs the rotation difference. Become. Absorption of the rotation difference of the torsion coil spring 12 is achieved by setting the unwinding amount due to the rotation of the winding shaft 2 larger than the winding pulley 9 as A and the winding amount due to the rotation of the winding pulley 9 as B. Twist coil spring 12
Let the predetermined number of times of pre-twisting be the initial number of torsions,
(BA) <(initial number of twists)
As a result, the torque generated by the torsion coil spring 12 constantly applies tension to the slat curtain 3 and the guide cable 10, and the slat curtain 3 is opened and closed without loosening.

Here, the slat curtain 3 described above is used.
The relationship of the balance at the time of opening / closing (elevating) operation will be described in detail. FIG. 5 used in this description shows the winding shaft 2 and the winding pulley 9 that are coaxially separated. First,
When the slat curtain 3 is fully opened (see FIG. 5A), the winding radius on the winding shaft 2 side is R ₁ , the winding radius on the winding pulley 9 side is R ₂ , the spring torque of the torsion coil spring 12 is T,
The lifting force of the slat curtain 3 is F, the load of the slat curtain 3 is W, and the winding radius of the winding shaft 2 side in the fully closed state of the slat curtain 3 (see FIG. 5B) is R ₁ ′. The winding radius of the winding pulley 9 is R ₂ ′, the spring torque of the torsion coil spring 12 is T ′, the lifting force of the slat curtain 3 is F ′, and the load of the slat curtain 3 is W ′, and R ₁ > R, respectively. _{1 '> 0,0 <R 2 <} R 2', T>
T ′, W <W ′, and R ₁ > R ₂ .

If the direction of the force acting in the direction in which the slat curtain 3 is raised is + and the direction of the force in the direction in which the slat curtain 3 descends is-, the fully opened state of the slat curtain 3 shown in FIG. The balance equation at the time of is F + (T / R ₂ ) = (T / R ₁ ) + W, that is, F = T ((R ₂ −R ₁ ) / (R ₁ · R ₂ )) + W
Becomes

The balance equation when the slat curtain 3 is fully closed as shown in FIG. 5 (b) is given by F '+ (T' /
_{R 2 ') = (T'} / R 1 ') + W' becomes, that is, F '
= T a _{'((R 2' -R 1} ') / (R 1' · R 2 ')) + W'.

Here, F ≠ F ′, and F <F ′
It is.

From the above relation, a graph as shown in FIG. 6 is obtained. The vertical axis is slat curtain 3
The vertical axis indicates the magnitude of force, the vertical axis indicates the closing (up) direction, the downward direction indicates the opening (down) direction,
The right direction in the drawing of the horizontal axis indicates the direction of the pulling force (+) of the slat curtain 3, and the left direction indicates the direction of the falling force (-) of the slat curtain.

According to this graph (FIG. 6), as the slat curtain 3 is raised (closed direction), the own weight W of the slat curtain 3 increases, and the force for descending (the force in the minus direction) increases. Since the torque T of the torsion coil spring 12 gradually decreases due to the change in the winding diameters R ₁ and R ₂ , the force F for lifting the slat curtain 3 does not greatly increase but gradually increases. As can be seen from the equation, the force F for lifting the slat curtain 3 is smaller than the weight W of the slat curtain 3, that is, the operation for lifting the slat curtain 3 can be performed much smaller than the force for lifting the slat curtain 3 itself. The opening operation can be performed lightly and smoothly.

In particular, in this embodiment, the winding shaft 2 side
Winding diameter R₁Is the winding diameter R on the winding pulley 9 side. _TwoSet larger
Because of the weight of the slat curtain 3 to be raised,
In comparison, the lifting force F can be reduced,
The curtain 3 is fully wound up on the winding shaft 2
So you can get a balance.

Therefore, according to the pull-up type shutter device 1 as a curtain opening / closing device configured as described above, the winding shaft 2 for winding the slat curtain 3 and the guide cable 1 are provided.
Since the take-up pulley 9 for winding 0 is mounted on the same shaft 4, it is possible to reduce the size of the entire apparatus and to have a simple structure. Because it is not used, there is no restriction on the installation position in buildings, etc., it is possible to install it on skylights with sloping roofs, etc. Even if it is installed on such slopes, it can smoothly open and close. it can.

Further, the winding shaft 2 and the shaft 4 of the winding pulley 9 are connected by a torsion coil spring (biasing member) 12, and the winding shaft 2 is connected to the winding shaft 2 by the biasing force of the biasing member 12. Since the slat curtain 3 and the guide cable 10 that connect the shaft 4 (the take-up pulley 9) are always provided with tension, the slat curtain 3 is not loosened, and a reliable opening and closing operation is performed. With this urging force, the guide rope 10
In addition, the slat curtain 3 can be securely wound without being loosened, and the opening and closing operation can be performed smoothly.

Further, the force for lifting the slat curtain 3 is assisted by a torsion coil spring 12 which is an urging member. And the other is always fixed to the other part, and the other always follows one, so that the biasing force of the torsion coil spring 12 is A large force is required because the biasing force 12 does not change greatly and changes only with a slight increase or decrease caused by the difference between the winding diameter of the winding shaft 2 and the winding diameter of the winding pulley 9. The opening and closing of the slat curtain 3 can be performed without the need, and the lifting operation as a closing operation can be particularly easily performed.

In the above-described embodiment, the example in which the winding diameter R ₁ on the winding shaft 2 side is set to be larger than the winding diameter R ₂ on the winding pulley 9 side has been described. diameter R ₂ may be larger constructed from winding diameter R ₁ of the winding shaft 2 side. In this case, as the slat curtain 3 is pulled up, the force F for pulling up the slat curtain 3 decreases, and the slat curtain 3 can be balanced in the fully closed state in which the slat curtain 3 is all extended.

Further, in the above-described embodiment, an example in which the slat curtain 3 is used as the curtain has been described. However, the present invention is not limited to this, and may be a roll screen or the like.

Further, in the above-described embodiment, this curtain opening / closing device is provided by disposing the winding shaft 2 below the opening 15 in the vertical wall of the building and pulling the slat curtain 3 upward from below. Although the example in which the lifting shutter device 1 is closed is described above, the shutter device may be installed not only on the wall surface of the building but also on a skylight or a horizontal surface of a sloping roof surface. Take shaft 2
And a shutter device having a structure in which the slat curtain 3 is wound up.

Further, in the above-described embodiment, the example in which the biasing member 12 provided between the shaft 4 and the winding shaft 2 is constituted by a torsion coil spring has been described, but as shown in FIG. , A spiral leaf spring. In the case of the spiral leaf spring 12, one end of the inner periphery is fixed to the shaft 4, and the other end of the outer periphery is fixed to a part of the winding shaft 2, for example, a connecting rod. The spring 12 is also twisted and mounted a predetermined number of times in advance, and is set so as to apply an urging force so that the winding shaft 2 always rotates in a fixed direction with respect to the shaft 4.

Further, in the above-described embodiment, the guide ropes 10 connected to the slat curtain 3 are located at the left and right ends of the upper edge 3a, and are hung by the two guide ropes 10, and each of the guide ropes 10 is wound. An example in which a pair of take-up pulleys 9 is provided has been described. As shown in FIG. 8, one guide wire 10 is connected to substantially the center of the upper edge 3 a of the slat curtain 3 and provided at one end of the shaft 4. With one taken up pulley 9,
It is good also as a structure which winds up and rewinds this guide rope 10. Also, as shown in FIG.
The guide ropes 10 are connected to and suspended from both left and right ends of the upper end edge 3a of the shaft 4, and the guide ropes 10 are joined together from a middle 10a, and are wound around a winding pulley 9 provided at one end of the shaft 4. May be adopted.

Further, in the above-described embodiment, the example in which the shape of the slat curtain 3 as a curtain is rectangular has been described.
As shown in FIGS. 10 to 13, it goes without saying that the shape of the upper edge of the slat curtain 3 may be variously selected and formed into a triangular shape, a trapezoidal shape, a pentagonal shape, a curved shape, or the like.

[0046]

As described above, in the curtain opening / closing device according to the present invention, the curtain opening / closing device is located at one side (lower side) of the building opening 15 and is disposed along the one side (lower side).
a shaft rotatably supported on the shaft 4, a winding shaft 2 that is rotatably provided externally around the shaft 4 and winds a curtain 3 that closes the opening 15, 4, a winding pulley 9 that rotates in the same direction as the rotation of the winding shaft 2 to wind and rewind the guide cable 10, and the shaft 4 and the winding shaft 2. In the space between the radial directions, the curtain 3 and the guide 3 are provided by being always provided with an urging force in a constant rotating direction regardless of the rotating directions of the shaft 4 and the winding shaft 2. Rope 10
And the biasing member 12 for imparting a tension to the same, are configured to be concentrically mounted on the same axis, so that it is possible to reduce the size of the entire apparatus and to achieve a simple structure. .

Further, since there is no need to use a hanging balancer as in the conventional opening / closing mechanism, there is no restriction on the installation position in a building or the like, and the installation can be performed on a skylight with an inclined roof surface or a horizontal ceiling surface. This makes it possible to smoothly open and close the curtain even when installed on such an inclined surface.

Further, the winding shaft and the shaft of the winding pulley are connected by an urging member, and a curtain for connecting the winding shaft and the shaft (winding pulley) by the urging force of the urging member. Since the guide rope is always provided with tension, the curtain and the guide rope do not loosen and have a tensioned state, so that the opening and closing operation can be reliably performed, and with this urging force. The guide line and the curtain can be wound up without any slack with respect to the shaft and the winding shaft, and the opening and closing operation can be performed smoothly.

The force for opening and closing the curtain is assisted by an urging member. The urging member is interposed between the revolving winding shaft and the shaft. Since the other is always fixed to the other part without being fixed, the urging force of this urging member always generates a substantially constant urging force without largely changing due to these rotations. Also, since this biasing force changes only with a slight increase or decrease caused by the difference between the winding diameter of the winding shaft and the winding diameter of the winding pulley, without feeling the force of lifting the curtain itself, and There is an effect that the curtain can be smoothly opened and closed without requiring a large force.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a curtain opening / closing device according to the present invention.

FIG. 2 is a partially cut front view of the curtain opening / closing device according to the embodiment.

FIG. 3 is a schematic side view of the curtain opening / closing device according to the embodiment.

FIG. 4 is a schematic side view of the curtain opening / closing device according to the embodiment.

FIG. 5A is a diagram illustrating the operation of the curtain opening / closing device according to the embodiment; FIG. 5B is a diagram illustrating the operation of the curtain opening / closing device according to the embodiment;

FIG. 6 is a graph showing the relationship between the opening / closing position of the curtain and the forces at opening / closing of the curtain of the curtain opening / closing device according to the embodiment.

FIG. 7 is a partially enlarged perspective view of a curtain opening / closing device according to another embodiment.

FIG. 8 is a perspective view of a curtain opening / closing device according to another embodiment.

FIG. 9 is a perspective view of a curtain opening / closing device according to another embodiment.

FIG. 10 is a perspective view of a curtain opening / closing device according to another embodiment.

FIG. 11 is a perspective view of a curtain opening / closing device according to another embodiment.

FIG. 12 is a perspective view of a curtain opening / closing device according to another embodiment.

FIG. 13 is a perspective view of a curtain opening / closing device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Curtain opening / closing apparatus (pull-up type shutter device) 2 ... Winding shaft 3 ... Curtain (slat curtain) 3a ... One end edge 4 ... Shaft 4a ... End 9 ... Winding pulley 10 ... Guide wire 11 ... Guide means 12 ... With Energizing member (torsion coil spring) 15: Building opening

Claims (4)

(57) [Claims] 1. A are arranged along the one side as well as located on one side of the building opening, and a shaft having both ends freely supported turning, freely extrapolated by turning the outer circumference of the shaft A winding shaft that winds a curtain that closes the opening, is connected to one edge of the curtain, and guides a guide for opening and closing the curtain. A winding pulley that is fixed to a shaft and rotates in the same direction as the rotation of the winding shaft to wind and rewind the guide rope; and guide means for guiding the guide rope to the winding pulley. In the space between the shaft and the winding shaft in the radial direction.
And an urging member disposed on the outer periphery of the shaft to apply a urging force in a constant rotation direction regardless of the rotation direction of the shaft and the winding shaft to apply tension to the curtain and the guide rope. , Which are opened by the movement of the curtain or the guide rope.
A curtain opening / closing device that is closed . 2. The curtain opening and closing device according to claim 1, wherein a winding diameter of the winding shaft is set to be larger than a winding diameter of the winding pulley. 3. The winding shaft is rotated with respect to the shaft.
A disk-shaped adapter and spacer that can rotate
And a connecting rod to be connected.
3. The curtain opening / closing device according to claim 1 or 2. 4. The shaft, a winding shaft and a winding pulley.
Is located below the building opening, and the guide rope is
The upper edge of the curtain is designed to be suspended upward.
The curtain according to claim 1, 2, or 3,
Switchgear.