JP2002305990A - Switching device for greenhouse sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switching device for greenhouse sheet, so contrived that a repair on the device in a partial breakdown, routine maintenance or design change thereof is easily carried out at a low cost. SOLUTION: This switching device for the greenhouse sheet has a connection shaft 4 connected to a winding shaft which winds and unwinds the greenhouse sheet so as to open and close the sheet, a drive part which drives the connecting shaft 4, and a control part which controls the winding and unwinding of the greenhouse sheet, wherein a casing 2 for receiving the drive part and a casing 3 for receiving the control part are separately formed and further the casing 2 for receiving the drive part and the casing 3 for receiving the control part are installed so as to be freely attached and detached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for opening and closing a greenhouse sheet, for example, a greenhouse sheet which is disposed on a side surface or a valley of a greenhouse and is opened and closed for ventilation, or a side surface in a greenhouse. The present invention relates to an opening / closing device for a greenhouse sheet or the like, which is provided on a ceiling surface and is used as a curtain (lining) that plays a light shielding and heat retaining function.

[0002]

2. Description of the Related Art In recent years, a wind-up type greenhouse sheet provided for ventilation of a greenhouse is wound by using a motor instead of being manually rotated and opened and closed by a handle connected to a winding shaft. The use of an opening / closing device for rotating a take-up shaft is increasing.

[0003]

[Problems to be solved by the invention]

[0004] This type of opening and closing device for a greenhouse sheet is usually constructed by incorporating a motor as a drive source into a main casing of the opening and closing device. The output shaft is connected to a take-up shaft via a transmission mechanism such as a gear, and is provided so as to move following the take-up shaft with the opening and closing of the greenhouse sheet. In such a greenhouse seat opening / closing apparatus, a control unit such as a stop limit switch is provided in addition to the drive unit. However, as a casing accommodating the control unit, a casing accommodating the drive unit is partially used. In addition, a seal is strictly applied to the joint between the two in order to prevent an electric leakage accident or a failure due to intrusion of rainwater or the like, so that the joint cannot be easily separated.

[0005] Therefore, when a design change is required, for example, when it is desired to incorporate a control unit capable of more complicated control into a greenhouse seat opening / closing device already installed in a greenhouse,
Since only the control unit cannot be separated and replaced, it is necessary to replace the entire device, and there is a problem that the cost is high. Also, the cause of the failure of the greenhouse seat opening and closing device is often a failure of only one of the driving unit and the control unit. In such a case, if only the defective portion is replaced, the original function of the device can be achieved. However, with the conventional structure, the entire device must be replaced, and the economic burden is large. In addition, the opening and closing device of the greenhouse sheet may be installed at a high place,
In the conventional structure in which the control unit and the drive unit cannot be separated, maintenance such as repair must be performed at a high place while being installed in a greenhouse, which is not only heavy labor but also dangerous. Further, although an AC motor is usually used as a driving source, it is used in an environment where it is easy to come into contact with water due to rain when installed outside a greenhouse and even when installed inside a greenhouse even when installed inside a greenhouse. Therefore, there is a possibility that the worker may receive an electric shock accidentally.

[0006] The present invention has been made in view of the above,
An object of the present invention is to provide an opening / closing apparatus for a greenhouse sheet that can easily and inexpensively perform repair, daily maintenance, design change, and the like for a partial failure of the opening / closing apparatus. In addition, the present invention uses a DC motor as a driving unit to improve repairability against the above-described failure and facilitate design changes. It is an object to provide a switchgear.

[0007]

According to a first aspect of the present invention, there is provided a greenhouse sheet opening / closing apparatus for winding a greenhouse sheet, rewinding the sheet, and opening and closing the sheet. A greenhouse sheet opening / closing device including a connecting shaft to be connected, a driving unit that rotates the connecting shaft, and a control unit that controls winding and rewinding of the greenhouse sheet, wherein the driving unit is housed. And a casing accommodating the control unit are separately formed, and a casing accommodating the drive unit and a casing accommodating the control unit are detachably provided. I do.

According to a second aspect of the present invention, there is provided an opening / closing apparatus for a greenhouse sheet according to the first aspect, wherein the driving unit is a DC motor.

In the casing accommodating the driving portion, a manual rotating shaft having a rotating tool engaging portion at one end and connecting the other end to the connecting shaft to manually rotate the connecting shaft is provided. A hole for allowing the rotary tool engaging portion of the manual rotary shaft to engage the rotary tool from outside the casing in which the driving portion is stored is formed at an appropriate position of the casing that stores the driving portion. It is characterized by being.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. 1 to 3
FIG. 1 is a view showing a greenhouse sheet opening / closing device 1 according to one embodiment of the present invention, in which a driving unit casing 2 in which a driving unit is accommodated, a control unit casing 3 in which a control unit is accommodated,
The connection shaft 4 is provided.

The casing 2 for the driving unit includes a first housing 21 having a substantially cylindrical shape in which a motor as a driving unit is housed, and a second housing 22 in which an output shaft of the motor and a speed reduction mechanism are housed.
It consists of. First accommodation section 21 and second accommodation section 2
Although 2 may be formed integrally, it is preferable to adopt a structure that can be separated by screwing as shown in FIG. 2 in consideration of the convenience of maintenance and repair of the motor and the speed reduction mechanism. Note that it is preferable to use a DC motor as the motor that is the driving unit. DC motors need only be small and lightweight to obtain the same output torque as compared to the case of using AC motors. Although the type of the DC motor 30 is not limited, for example, it is preferable to use a permanent magnet field DC motor using a permanent magnet for the field. This is because the size is smaller than that of the winding field type, and further reduction in size and weight can be achieved by selecting a permanent magnet material. In addition, the DC motor has high safety, and is suitable for use in an environment in which it is likely to come into contact with water due to rainfall or moisture in a greenhouse and an electrical leakage accident is likely to occur.

The second housing 22 houses the output shaft of the DC motor protruding from the first housing 21 as described above, and the speed reduction mechanism composed of a plurality of gears. The speed reduction mechanism is interposed between the output shaft of the DC motor and the connection shaft 4 to adjust the rotation speed of the output shaft of the DC motor to an appropriate rotation speed for the connection shaft 4 to wind and rewind the curtain 10. The deceleration is performed, and a known configuration can be used.

A connecting shaft insertion hole 22a is provided at a substantially central portion of the second housing portion 22, and the connecting shaft 4 is provided.
Project through the connecting shaft insertion hole 22a to the outside. In order to open and close the greenhouse sheet 10 for ventilation provided on the side surface of the greenhouse, for example,
The take-up shaft 11 attached to the lower end of the greenhouse sheet 10 is connected.

Further, the second accommodating portion accommodates a manual rotating mechanism for forcibly rotating the connecting shaft 4 to open and close the greenhouse sheet in the event of a power failure or failure of the DC motor. The manual rotating mechanism includes a manual rotating shaft 6 having a connecting portion (not shown) connected to the connecting shaft 4 and having a tool engaging portion 6a at one end of which a rotating tool is engaged. The connecting portion of the manual rotary shaft 6 is formed by a known rotating mechanism directly or through another gear, such as forming a worm in a part of the manual rotary shaft 6 or providing a gear such as a bevel gear at the tip. 4. As the tool engagement portion 6a, a plus or minus driver groove can be formed at the top of the head, or the end can be formed into a hexagonal recess for fitting a tool such as a hexagon wrench or a bolt shape for fitting a spanner. .
A hole 22b is formed in a side portion of the second storage portion 22, and the tool engagement portion 6a is arranged so as to be exposed to the outside from the hole 22b. With this configuration, a rotating tool such as an electric drill can be engaged with the tool engaging portion 6a from the outside of the casing 2 for the driving portion. By manually rotating the connecting shaft 4, the greenhouse sheet 10 can be easily opened and closed, which is convenient.

On the back surface of the second housing 22, there is provided an outlet hole 22c for the detection gear 7 for detecting the rotation of the connecting shaft 4. The detection gear 7 protrudes out of the second housing portion 22 through the extraction hole 22c, and is engaged with a gear constituting a control mechanism in the control unit casing 3 described later. Therefore, the rotation of the connection shaft 4 is transmitted to the control unit via the detection gear 7.

In the casing 3 for the control section, if the opening / closing width of the greenhouse sheet 10 opened and closed by the greenhouse sheet opening / closing device 1 is arbitrarily set, or if the greenhouse sheet 10 reaches the winding limit position and the rewind limit position, Control parts such as gears, limit switches, etc., necessary for automatically controlling the motor to stop rotating, and an electronic circuit for controlling the greenhouse seat opening / closing device 1 under arbitrary conditions are housed therein. Is done. For example, by rotating a gear having a contact piece via a gear that meshes with a detection gear 7 protruding from the drive unit casing 2, the gear stops at a winding limit position appropriately disposed in the control unit casing 3. A control mechanism (not shown) for switching the first limit switch to be turned on and the second limit switch for stopping at the rewind limit position to set the open / close width of the greenhouse sheet is accommodated. Also,
A rain sensor, a temperature sensor, a humidity sensor, etc., for detecting any environmental conditions inside and outside the greenhouse are provided alone or in combination of two or more, and the detection result by this sensor is reflected on the control means for controlling the drive of the DC motor It is also possible to adopt a configuration in which it is performed. For example, when the temperature sensor detects that the temperature of the greenhouse becomes higher than the set value, the DC motor is driven in the forward direction to open the greenhouse sheet 10 to open the greenhouse sheet 10 by a predetermined amount, or the greenhouse is opened. When the temperature sensor detects that the temperature has become lower than the set value, the DC motor can be driven in the reverse direction to be closed by a predetermined amount.

The shape of the control unit casing 3 is not particularly limited. The control unit casing 3 can be formed along the outer shape of the accommodated control mechanism, or can be formed in a cylindrical shape, a rectangular parallelepiped, or the like. The control unit casing 3 is provided detachably with respect to the drive unit casing 2. As described above, the DC motor as the driving unit and the control unit for controlling the DC motor are housed in the casings 2 and 3 which are separately formed.
By providing the control unit casing 3 in the drive unit casing 2 detachably, if there is a failure in any of the drive unit and the control unit or if it is desired to control the motor by incorporating another control mechanism, Even in the case where the entire greenhouse seat opening / closing device must be replaced, only the drive unit casing 2 or the control unit casing 3 needs to be replaced, and the economic burden is small. Further, the moving distance of the greenhouse seat opening / closing device 1 can be changed by changing the size of the gear housed in the control unit casing 3 that meshes with the detection gear 7, but even in such a case, the control unit The design can be easily changed by removing the casing 3 from the drive unit casing 2 and appropriately replacing the gears. In addition, even when the greenhouse seat opening / closing device 1 is installed at a high place, it is necessary to remove only the parts requiring the repair and the design change as described above and carry out the repair by taking out the work environment. It is possible to reduce the work load and to perform the work safely.

More specifically, in the present embodiment, as shown in FIG. 2, the control unit casing 3 includes a detection gear 7 protruding from the back surface of the second housing portion 22 of the drive unit casing 2. Is provided. Therefore, at the time of assembly, the detection gear 7 is inserted into the control unit casing 3 from the insertion opening 3a, and the control unit casing 3
The casing 2 for the drive unit and the casing 3 for the control unit are brought into close contact with each other while meshing with the gear housed therein. Then, the screw insertion hole 3b formed at an appropriate position of the control unit casing 3 and the female screw 22d formed in the drive unit casing 2 are aligned, and the control unit casing 3 is
It can be attached to the drive casing 2. When removing the control unit casing 3 from the drive unit casing 2, the detection gear 7 can be easily separated by loosening the screw and pulling out the detection gear 7 from the control unit casing 3. In addition, for example, other means such as providing a locking piece (not shown) in the control unit casing 3 and providing a locking piece receiving portion with which the locking piece can be engaged in the driving unit casing 2. It is a matter of course that the control unit casing 3 can be detachably attached to the drive unit casing 2 by using various methods.

An opening 3c is provided on the back of the control unit casing 3 so that the adjusting rod 5 penetrates the control unit casing 3 and protrudes to the outside. The adjustment rod 5 is provided to adjust various settings controlled by the control unit housed in the control unit casing 3. For example, by rotating a gear having a contact piece through a gear meshing with a detection gear protruding from the drive unit casing 2,
Switching between a first limit switch disposed in the control unit casing 3 for stopping at the winding limit position and a second limit switch for stopping at the rewind limit position to open and close the greenhouse sheet The initial position of the gear can be arbitrarily adjusted by the adjustment rod 5 in the control mechanism that sets

A greenhouse sheet opening and closing device 1 according to the present embodiment.
As shown in FIG. 4, while being supported by the guide member 9 via the moving member 8 and being connected to the winding shaft 11 attached to the lower end of the greenhouse sheet 10, the As illustrated in FIG. 3, the member 8 includes two frames 81 and four rollers 82 rotatably spanned between the two frames 81. Then, the attachment piece 81a provided on one of the frames 81 is attached to the drive unit casing 2 by being fixed to the casing 2 with bolts. The four rollers 82 are connected to the frame 8
Two pairs are provided in the vicinity of the upper part and the lower part of 1 at predetermined intervals, and the guide member 9 is inserted between the rollers 82 constituting each pair.

First, as shown in FIG. 4, the greenhouse sheet opening and closing device 1 according to the present embodiment
A DC motor is connected to a DC power supply while being inserted between each pair of rollers 82 constituting the moving member 8. As the DC power supply, a rectifier that is connected to an AC power supply and converts to DC can be used, but a storage battery or a DC generator can also be used.

For opening and closing the ventilation greenhouse sheet 10 provided on the side of the greenhouse, for example, the connection shaft 4 is connected to a winding shaft 11 attached to the lower end of the greenhouse sheet 10. .

The greenhouse sheet 10 is rewound to bring the ventilation section into a fully closed state. In this state, when the main switch provided on the operation panel is turned on in the opening direction, the DC motor is driven and the output shaft rotates in one direction. As a result, while the connecting shaft 4 rotates in one direction, the winding shaft 11 rotates, and the greenhouse sheet 10 is wound up.

When the greenhouse sheet 10 is wound up, the winding shaft 11 rises with it. The moving member 8 follows the guide shaft 9 and rises along the guide member 9, and the rollers 82 move. Since the stator side of the DC motor is engaged with the guide member 9, the greenhouse seat opening and closing device 1 moves together without rotating the stator side of the DC motor. At this time, according to the present embodiment, since a DC motor is employed as the driving unit,
The weight of the entire opening and closing device 1 is considerably lighter than the case where an AC motor is employed, and the winding shaft 11 near the opening and closing device 1 hardly bends downward and meanders.

In the above description, the case of opening and closing the ventilation greenhouse seat provided on the side of the greenhouse is described. However, the greenhouse seat for ventilating the valley in the continuous greenhouse is described. Of course, it can be used as an opening / closing device for a greenhouse sheet used as a curtain (lining) for shading and keeping heat in a greenhouse along a ceiling surface or a side surface.

[0026]

According to the opening / closing device for a greenhouse sheet of the present invention, the casing accommodating the drive section and the casing accommodating the control section are formed separately, and both are detachably attached. Therefore, only one can be removed, and repair, daily maintenance, and design change for a partial failure of the switchgear can be easily and inexpensively performed. Further, when a DC motor is used, there is an effect that the safety is high and the device is suitable as an apparatus to be used in an environment where it is likely to come into contact with water due to rainfall or moisture in a greenhouse and an electric leakage accident is likely to occur.

[Brief description of the drawings]

FIG. 1 is a view showing a greenhouse sheet opening and closing device according to one embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a control unit casing is removed from a drive unit casing.

FIG. 3 is a perspective view showing a state in which a moving member is attached to the greenhouse sheet opening and closing device according to the embodiment.

FIG. 4 is a diagram for explaining an operation of the greenhouse sheet opening and closing device according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening / closing apparatus of the sheet for greenhouses 2 Casing for drive part 21 1st accommodating part 22 2nd accommodating part 3 Casing for control part 4 Connecting shaft 5 Adjustment rod 6 Manual rotating shaft 7 Detection gear 8 Moving member 9 Guide member 10 Greenhouse Sheet 11 winding shaft

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ryo Otsuka 262-10 Shiba, Kokubunji-cho, Shimotsuga-gun, Tochigi F-term in Seiwa Koganei Plant (reference) 2B029 EC12 EC18 LA01 NA19 RA03 RA06 RB07 RB25

Claims (3)

[Claims] 1. A connecting shaft connected to a winding shaft that winds, rewinds, and opens and closes a greenhouse sheet, a driving unit that rotates the connecting shaft, and control of winding and rewinding of the greenhouse sheet. And a casing for accommodating the drive unit and a casing for accommodating the control unit, respectively, and the drive unit is accommodated therein. A greenhouse seat opening and closing device, wherein a casing and a casing in which a control unit is housed are detachably provided. 2. The greenhouse sheet opening / closing device according to claim 1, wherein the driving unit is a DC motor. 3. A manual rotating shaft connected to the connecting shaft and having a rotating tool engaging portion formed at one end, wherein the rotating shaft is rotated by engaging a rotating tool with the rotating tool engaging portion. A manual rotating mechanism configured to be forcibly rotated is housed in a casing in which the driving unit is housed, and a rotary tool is provided from outside the casing in which the driving unit is housed in a rotating tool engagement portion of the manual rotating shaft. 2. A hole, which allows the engagement of the drive unit and rotation, is formed at an appropriate position of a casing in which the drive unit is housed.
Or the opening and closing device of the sheet for greenhouses according to claim 2.