JPS6141563Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an opening/closing device for winding and unwinding a film, sheet, etc. stretched as a partition curtain in a greenhouse.

Generally, when a long film or the like is wound and unwound using a winding shaft that rotates at a constant speed, the winding amount changes and the winding diameter increases or decreases. Therefore, even if the rotational speed of the winding shaft is constant, the winding and unwinding speeds change.
In such cases, the applicant has already proposed a device for moving the unrolled part of the film, etc., which is being wound or rewound without causing any dubbing or tension. 23494
I am proposing a number. In this device, the winding drum is rotated by a constant speed drive device such as an electric motor to drive the traveling rope, and the moving edge of the curtain is moved at a constant speed, and the curtain winding shaft is driven by a mainspring spring. It is biased in the winding direction as a source. According to these, when the curtain opening/closing width, winding shaft length, curtain thickness, etc. are large, the rotational torque generated when winding the curtain becomes large.
Corresponding to this, the setting torque of the mainspring must be made strong. Therefore, there is a drawback that the mainspring spring driving section is large and expensive.

The present invention was provided in order to eliminate the above-mentioned drawbacks, and its purpose is to provide a partition curtain that is wound with one end fixed to a winding shaft, and a partition curtain that is wound with one end fixed to a winding shaft. a first drive device for rotating the curtain; It consists of a running rope connected to a moving end, a drum shaft that supports one or more of the winding drums and can rotate forward and backward, and a mainspring spring as a driving source to always urge the drum shaft to rotate in one direction. This is achieved by a greenhouse curtain opening/closing device comprising a second drive device.

Next, the present invention will be explained in more detail according to an embodiment shown in the drawings.

1 is a greenhouse; 1a and 1b are left and right side wall frames of the greenhouse 1; 2 is a drum shaft for a running rope disposed along the side walls of the greenhouse; Therefore, a rotational force in the r direction is always applied. Reference numeral 3 denotes a winding drum fixed on the drum shaft 2, and a long running rope 4 is wound around the circumferential surface of the drum so that both ends thereof are wound in opposite directions. Reference numeral 5 denotes a winding shaft disposed along the side wall of the greenhouse, and is provided so as to be capable of winding up and unwinding the partition curtain 6 by fixing its base end edge thereto. The winding shaft 5 is provided so as to be rotatable in forward and reverse directions at a constant speed by a prime mover M with or without a transmission mechanism. Reference numeral 8 denotes a support member for supporting the intermediate portion of the winding shaft 5, and rotatably supports the rolled winding portion of the curtain 6 on it.
Reference numeral 9 denotes a plurality of mutually parallel support wires stretched and fixed below the curtain 6, and form a partition surface when the curtain is opened and closed.
Thus, the running rope 4 is guided by guide pulleys 10a and 10b.
The winding drum 3 is wound endlessly around the winding drum 3, and the running direction of the running portions 4a and 4b changes according to the forward and reverse rotation of the winding drum 3. Reference numeral 12 indicates the movable edge 6a of the curtain 6 and one of the running portions of the running rope (4 in the figure).
(a) A fixing device, for example, a fastening clip. Although the drawings show that the winding shaft 5 is disposed on the side wall 1a of the greenhouse on the same side as the drum shaft 2, disposing it on the side wall 1b is a design change included in the present invention. Rather than making the running rope endless, one end is wound around a winding drum as shown in the running rope 4' in Fig. 2.
The other end may be fixed to the curtain edge 6a.

FIG. 3 shows a second drive device 7 for rotationally energizing the drum shaft 2. As shown in FIG. 7l is a casing fixedly attached to the greenhouse frame, and 13 is an output drum, which is rotatably supported within the casing 7l with the output shaft 13a as a pivot. A main drum 14 is rotatably supported within the casing 7l about a pin 14a. 15 is a constant torque mainspring spring, one end of which is fixed to the winding part 13b of the output drum 13, and the other end is not fixed to the winding part 14b of the drum 14, but is tightly wound. has been done. 13
Reference characters c and 14c are flanges on both sides of each of the drums 13 and 14, which are provided as necessary to wind the mainspring spring 15 in an aligned manner. 16 is a tightening screw, and the tubular output shaft 13
The drum 2 is connected and fixed in a state where it is inserted into the interior of the drum 2. It goes without saying that the drum shaft 2 may be shaped like a rectangular tube as shown in the drawings, or may be a round pipe, a round bar, or the like.

Now, when the winding shaft 5 is rotated in the direction of arrow Y by the prime mover M, which is the first driving device, the curtain 6 wound into a roll is rewound. Therefore, the tension on the unrolled surface of the curtain is reduced, so that the movable edge 6a is pulled in the direction of arrow S by the rope running section 4a via the clip 12 and closed. That is, the winding drum 3
Since the mainspring spring 15 in the drive device 7 is biased to rotate in the direction of the arrow r by receiving the unwinding torque from the output drum 13 to the main drum 11, the running rope is driven by the reduction in tension in the curtain. This is the result.
At this time, since the main spring spring 15 is a constant torque main spring spring, the rotational torque of the output drum 13 during rotation is always constant. Therefore, the winding shaft 5
Even if the winding diameter decreases and the moving speed of the moving edge 6a of the curtain 6 slows down, the running portion 4b of the running rope 4 is wound around the winding drum 3 with a constant torque regardless of the speed change. It is something that can be done. In other words, the traction force on the clip 12 can be kept constant.

Next, when the prime mover M is reversed, the curtain 6 is wound up on the winding shaft 5 and opened. At this time, the running rope 4 is pulled by the curtain 6 through the clip 12 in the direction opposite to the arrows s and t.

Therefore, the winding drum 3 and the drum shaft 2 are also rotated in the direction opposite to the arrow r, so that the mainspring spring 15 is extracted from the main drum 14 and wound around the output drum 13. That is, the winding drum 3 is rotated against the unwinding torque of the mainspring spring 15. However, in this case as well, since the unwinding torque is always constant, the tension at the clip 12 remains constant regardless of changes in the moving speed or moving position of the curtain moving edge 6a.

Therefore, when the curtain is closed, the unwinding rotational load of the roll-shaped winding portion of the curtain is applied to the electric motor M, and the pulling load on the curtain edge 6a is only the tension of the curtain unwinding portion, so that the mainspring spring 15 is not required. The set torque to be set does not have to be as large as shown in the left. Therefore, the second drive device 7 can be made small and low cost.

Since the present invention has the above-described structure and operation, even if the moving speed of the curtain moving edge 6a changes due to an increase or decrease in the winding diameter of the winding shaft rotated by the first drive device that rotates at a constant speed, Due to the characteristics of the mainspring spring 15, the running rope 4 runs in accordance with the curtain moving speed and always pulls the curtain in the unwinding direction, that is, in the closing direction, so that there is no doubling of the curtain partitioning surface. Furthermore, if a constant torque mainspring spring 15 is used as shown in the figure, the curtain traction torque is always constant, so the clip 12
Curtain 6
No damage to the product. Of course, instead of the constant torque mainspring spring, a wound type normal mainspring having an appropriate setting torque may be used.

In addition, winding shafts 5, 5...
These may be provided so that they are simultaneously rotated by one prime mover M via an appropriate transmission mechanism. At this time, the running rope 4 that pulls the curtains 6, 6, etc. wound around each winding shaft is driven to be stretched in each ridge as shown in FIG. 2, or is continuously stretched across each ridge. It goes without saying that it may be moved by one drum shaft 2.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the curtain opening/closing device according to the present invention, FIG. 2 is a partially omitted perspective view,
FIG. 3 is a central vertical sectional view showing an embodiment of the second drive device. 2... Drum shaft, 3... Winding drum, 4... Running rope, 5... Winding shaft, 6... Curtain, 7...
...Second drive device, M...First drive device.

Claims (1)

[Claims for Utility Model Registration] 1. A partitioning curtain wound with one end fixed to a winding shaft, a first driving device for rotating the winding shaft in forward and reverse directions, and a partitioning surface of the curtain. a running rope stretched substantially parallel to the winding drum, at least one end of which is fixed to a winding drum, and the other end or a key point of the running part is connected to the movable edge of the curtain; and one or more of the winding ropes. It has a drum shaft that supports the take-up drum and can rotate in forward and reverse directions, and a second drive device that uses a constant-torque spring spring as a drive source to always urge the drum shaft to rotate in the curtain partition closing direction. Greenhouse curtain opening/closing device. 2. The greenhouse curtain opening/closing device according to claim 1, wherein a plurality of curtain winding shafts are simultaneously rotated by one first drive device.