JPS606130A - Wind-up type sheet opening and closing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a roll-up sheet opening/closing device used in plant cultivation greenhouses and the like.

Conventional Structures and Problems Generally, in greenhouse cultivation, it is common to use heat-retaining sheets, but the sheets are opened during the day and closed at night. There are two ways to open and close this sheet: a pull-out type and a roll-up type, but the pull-out type creates too much shade in the room, which has a negative impact on crop growth, and tends to create puddles, making it difficult to open and close the sheet. There was a problem that occurred.

In terms of construction, the pull-through type required much more labor than the roll-up type. On the other hand, the winding type does not have the above disadvantages, but foreign objects (seams other than opening/closing seam 1 and
If there is any sagging of the foreign object or the sheet holding band, etc., there is a problem in that the force between the foreign object and the opening/closing sheet causes one of them to be torn apart.

By the way, even though the retractable type is far superior to the retractable type, the retractable type is already motorized, while the retractable type has some problems. The reality is that it has not been electrified. This is because it is difficult to deal with the above-mentioned problem of foreign matter being rolled in, which is the only drawback of the winding type. When using manual winding, even if a problem with foreign matter occurs, it can be detected early by feeling with the hand or visually.
Although it can be dealt with on a case-by-case basis, it is extremely difficult to deal with this when electrified.This is a major reason why electrification has not yet been achieved. Once a problem occurs in the motor, the sheet is torn and the sheet winding shaft is deformed.
Its restoration requires a great deal of effort and expense. Although the winding type has many advantages over the pulling type, it is difficult to deal with the trouble of winding up as described above, so it has not been electrified until now.

Purpose of the Invention The present invention has been developed with the above in mind, and has developed a winding system that can detect winding problems at an early stage and stop the motor even when a motor is used, in the same way as manual winding operation. An object of the present invention is to provide a seat opening/closing light.

Structure of the Invention In order to achieve the above object, the present invention provides an apparatus that has a take-up rope and an unwind rope, and winds and unwinds a sheet via the take-up rope and the unwind rope by a speed reducer motor. In this invention, a retractable seat opening/closing device has a configuration in which a spring is interposed in the middle of the unwinding rope, and the contraction of the spring operates a switch to stop the reducer motor. Basically, as will be explained in the embodiments below, an emergency stop can be made if a foreign object is caught during the winding operation.

Description of examples An embodiment of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a sheet, one end of which is fixed to a part of the greenhouse, and the sheet is arranged so that its surface is inclined. A driving tapered drum 3 and guiding tapered drums 4, 4' are fixed close to one end of the sheet winding shaft 2. Reference numeral 5 denotes a winding rope, one end of which is wound around and fixed to a drive drum 8 fixed to the output shaft 10 of a reducer motor 9 installed in a part of the greenhouse, and the other end is fixed to the drive tapered drum 3. The required amount is rolled in and fixed in the large direction in advance so that it can be unraveled from the small diameter side. Reference numeral 6 denotes a rewinding rope, one end of which is wound and fixed in advance to the driving drum 8 by a required amount in the opposite direction to the winding direction of the winding rope 5, and the other end is attached to an extension in the direction of the sheet winding shaft 2. It is pulled back via a first pulley 11 located opposite to the driving drum 8, and is fixed so as to be wound around the driving tapered drum 3 from the small diameter side.

A second pulley 12 is inserted in the middle of the unwinding rope 6 wound around the drive drum 8, and this pulley 12 is pulled by a spring 13. 14 is the lower limit switch, 1
Reference numeral 5 denotes an upper limit switch, both of which are installed in a hole where the sheet winding shaft 2 comes into contact with the actuator of each limit switch 14, 16. 16 is a thread, one end of which is connected to the second pulley 12 and the other end to the actuator of the upper limit mint switch 15.

In the above device, when opening the seat 1, if the output shaft 1o of the reducer motor 9 is turned in the incoming direction, the drive rope 8
Attempts are made to pull the take-up rope 6 in the direction of the arrow. on the other hand,
Since the guide rope 7.7' has already been wound up in the required amount on the guiding tapered drums 4, 4' and one end thereof is fixed to a part of the greenhouse, the guide rope 7.7' must be unraveled. The guide rope 7,7' is pre-wound in such a way that when the take-up roller 6 is pulled in the direction of the arrow,

Therefore, when the output shaft 1o of the reducer motor 9 rotates in the input direction, the sheet winding shaft 2 rotates in the B direction, moves toward the drive drum 8 while winding up the sheet 1, and comes into contact with the upper limit switch 15. and stop.

The reducer motor 9 employs a worm reduction mechanism and is self-locking.

When closing the seat 1, the output shaft 10 of the reducer motor 9
When the sheet winding shaft 2 is rotated in the opposite direction to the direction A, the winding roller 16 is engaged, and the sheet winding shaft 2 tends to roll down along the inclined surface (indicated by the dashed line). At this time, the winding rope 6 and the guide ropes 7 and 7 are respectively wound up again around the driving tapered drum 3 and the guiding tapered drums 4 and 4'. At this time, if the slope of the inclination plane 1 is small, and if there is a large amount of distortion on the inclined plane, the unwinding rope 6 is used because the component that tends to roll down the sheet winding shaft 2 is small.

When unwinding the sheet, the unwinding rope 6 is unwound from the driving drum 8 in advance, and the unwound rope is wound up from the small diameter side of the driving tapered drum 3 via the first pulley 11. When closing the sheet 1, the drive drum 8 is rotated in the opposite direction to the opening direction.
The unwinding rope 6 is wound around the drive drum 8 and attempts to pull the drive tapered drum 3 in the opposite direction of the arrow via the first pulley 11. On the other hand, since the sheet 1 is wound around the sheet winding shaft 2, the sheet 1 cannot be moved unless it is unwound. Therefore, the sheet take-up shaft 2 is forced to rotate and move so that the sheet 1 is unwound. Further, a second pulley 12 is inserted in the middle of the unwinding rope 6 and biased by a spring 13, so that a tension load is constantly applied to the unwinding rope 6. This plays the role of adjusting the slight difference in rope elongation between the winding rope 6 and the unwinding rope 6, but the more important function is that this spring 13 contracts when a winding trouble occurs. It is. (Here, when opening sheet 1, wrap the foreign object)
If the winding is loaded, the load of winding up the foreign object will be added to the normal load. If the direction opposite to the winding side of the foreign matter is fixed, tension will occur between the sheet winding shaft and the foreign matter.

The stronger the tensile strength of the foreign material, the greater the abnormal load added to the normal winding load. The sheet winding shaft 2 will break if the tensile strength of the sheet 1 is weak.

The increase in load when the winding is l/rub results in an increase in the strength of the winding rope 6, and the winding rope 5 is suddenly stretched.

At this time, the drive drum 8 winds up the length of the winding rope 5, but at the same time unwinds the unwinding rope 6 in excess.
This excess amount of unwinding rope 60 is absorbed by spring 13. That is, the spring 13 will be compressed. This abnormal contraction of the spring is transmitted to the upper limit switch 15 through the thread 16, causing the spring 13 to collapse.
By arranging the structure so that the second limit limit switch 16 operates to stop the speed reducer motor 9 when the voltage reaches 1, an emergency stop device in case of an overload trouble is completed.

Effects of the Invention As is clear from the description of the embodiments above, the present invention constitutes an emergency stop device in the event of entanglement trouble, which has been a problem for many years, and the device is compact, can be provided at low cost, and has reliable operation. This is extremely effective as it can promote the electrification of retractable seat opening/closing devices.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the overall structure of a winding type seat opening/closing device according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of thread pulling. 1...Sheet, 2...Sheet winding shaft,
3゛・・・・・・Tapered drum for driving, 4, 4′ hitting・
・Guiding tapered drum, 5°...take-up rope,
6...1 Rewinding rope, 7.7'...Guide rope, 8...Driving drum, 9...Reducer motor, 1o...Mark/output Shaft, 11...1 first pulley, 12...mountain/second pulley, 13...-spring, 14...lower limit glue mint switch, 1
5...±1 slope limit switch, 16...
···thread.

Claims (1)

[Claims] In a device that has a take-up rope and an unwind rope and winds and unwinds a sheet via the take-up rope and the unwind rope by a speed reducer motor, a spring is interposed in the middle of the unwind rope. and a retractable seat opening/closing device configured to actuate a switch by the contraction of the spring to stop the reducer motor.