JP2002247923A - Elevating frost-prevention fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating frost-prevention fan facilitating the extension or contraction of a pole relative to a supporting part with slight labor. SOLUTION: The elevating frost-prevention fan is composed of pipes 3b and 3a having a fan 10 attached to the top, a supporting part 2 supporting the pipes in an extensible manner and embedded in a tilled land G, a driving apparatus 20 having a rotatable drum and placed on the tip end of a supporting arm 6 attached to the upper part of the supporting part 2 and a detachable power amplifying apparatus 30. The power amplifying apparatus 30 amplifies the rotational power of a rotary power tool and transmits to the driving apparatus 20 to lift or lower the pipes 3a, 3b and the fan 10 with the drum, wire and pulley. When the rotation of the drum is stopped with stoppers 7a, 7b, the power amplifying apparatus 30 renders the rotary power tool to effect idle rotation with a clutch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-frost fan for preventing frost damage to crops, and more particularly to an elevating type anti-frost fan capable of adjusting the height of a blower.

[0002]

2. Description of the Related Art Conventionally, in the cultivation of agricultural products, for example, in a tea plantation, as shown in FIG. The whole is warmed to prevent frost damage. This type of anti-frost fan 50 generally includes an axial fan for blowing air at the upper end of a pole 51. In a relatively large tea plantation, a tea picking machine W spanning a tea ridge T is introduced for spraying medicine and harvesting tea leaves. In such a tea garden, it is necessary to install many anti-frost fans 50 according to the area,
If the pole 51 is standing on the inside of the tea ridge or on the ridge, it becomes a hindrance when using a working machine such as a tea picking machine W that straddles the tea ridge T. For this reason, for example, Japanese Unexamined Patent Application Publication No. 11-0628
No. 84, Japanese Unexamined Patent Application Publication No. 2000-505074 and Japanese Unexamined Patent Application Publication No. 2001-000055 have been developed.

[0003]

However, JP-A-11-062884 and JP-A-2000-0507
The lifting and lowering type frost prevention fan described in Japanese Patent Publication No. 49 is supported by moving a pole with a pole mounted with a pole mounted with a blower at the tip so that the pole can be extended and contracted with respect to a support section buried in cultivated land. This adjusts the amount of expansion and contraction of the pole with respect to the portion, that is, the height position of the blower. Since the telescopic drive device is located at the top of the pole, the drive unit rises to the top of the pole and reaches out of reach of humans. Therefore, a power source such as a motor is required. Generally, the anti-frost fan is operated from the night when the temperature falls due to its function, to the early morning. Therefore, low-cost midnight power is used. Therefore, there is a problem in performing the expansion and contraction operation of the elevating type defrost fan in the daytime. In addition, at the time of a power failure or when a failure occurs in the drive device, the expansion and contraction work cannot be performed. If it breaks down during extension, repair is also difficult.

[0004] In addition, if an up-and-down type defrost fan as disclosed in Japanese Patent Application Laid-Open No. 2001-000055 is used, it is possible to extend and retract the work by manually turning a rotary handle. When the number of elevating and lowering type defrost fans increases, the work load increases and it becomes difficult to work quickly.

[0005]

According to a first aspect of the present invention, there is provided an elevating type frost prevention fan according to the first aspect of the present invention. With the use of the elevating type frost prevention fan according to claim 1, a drive device and an intensifier capable of extending and retracting the pole can be arranged at a workable height, and a rotary electric motor generally sold on a rotating shaft of the intensifier is provided. By attaching a tool, that is, a drill, a driver, a wrench, or the like, having a low rotational force, the pole can be extended and contracted. This simplifies the structure because the pole does not require a power source, and can be manufactured at low cost. Further, the work of extending and retracting the pole can be performed easily and quickly. Also, if a rechargeable power tool is used, a power source for extending and retracting the pole is not required.

According to a second aspect of the present invention, there is provided an elevating type defrosting fan as described in claim 2. By using the elevating type frost preventing fan according to claim 2, in a tea garden where a plurality of elevating type frost preventing fans are installed, one intensifier can be used for both expansion and contraction work, and the structure of the pole is simplified. , Also can lower the cost of the pole.

A third aspect of the present invention is an elevating type defrost fan according to the third aspect of the present invention. By using the elevating type frost prevention fan according to the third aspect, the intensifier can be easily and reliably attached and detached by the guide.

According to a fourth aspect of the present invention, there is provided an elevating type anti-frost fan as described in claim 4. With the use of the elevating type frost prevention fan according to claim 4, when the pole reaches the uppermost part during the pole extension operation, the wire winding drum does not rotate any more, and a force more than necessary is transmitted to the driving device by the clutch. And there is no danger of damaging the driving device and the like. In addition, when a power tool directly connected to a motor is used, when the pole reaches the highest position, the locking of the tool prevents a force from being applied to the wrist due to a recoil to the operator, and is safe.

According to a fifth aspect of the present invention, there is provided an elevating type defrost fan according to the fifth aspect. The use of the up-and-down type frost prevention fan according to claim 5 enables the pole to be moved up and down in an emergency such as when the battery of the rechargeable power tool runs out.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a lifting type anti-frost fan according to the present invention, in which the anti-frost fan is in use. FIG. 2 is a diagram illustrating a stored and non-use state. Also,
FIG. 3 shows a configuration of the support arm of the present invention, FIG. 4 is a perspective view showing an internal configuration of the booster, and FIG. 5 is an exploded perspective view showing a configuration of the clutch.

The up-and-down type defrost fan 1 of this embodiment comprises a support portion 2 and a plurality of (two in this embodiment) cylindrical bodies 3a, 3a.
b, a mounting base 4, a blower 10, a support arm 6, a drive unit 20, a booster 30, and the like. The support portion 2 is buried in the cultivated land G such as in the storage space t of the tea ridge T. The cylinders 3 a and 3 b are supported by the support 2 so as to be able to expand and contract with respect to the support 2. The mounting base 4 is a cylindrical body 3
b. The blower 10 is fixed to the mounting base 4. The support arm 6 is attached to the support section 2 with an inclination upward. A drive device 20 for adjusting the cylinders 3a and 3b up and down with respect to the support 2 is attached to the tip of the support arm 6, and includes a detachable booster 30 that amplifies the drive force and transmits the drive force to the drive device. ing.
When the blower 10 is folded in a state in which the cylinders 3a and 3b are most contracted with respect to the support portion 2, the uppermost end of the elevating type frost prevention fan obstructs the work equipment such as the tea picking machine W. It is preferable to set the height range so as not to be too large.

The blower 10 includes a fan base 11, a swing member 12, a fixing member 18, and the like.

The swing member 12 is rotatably mounted on the fixed member 18 (in the direction perpendicular to the plane of FIG. 1 and FIG. 2), and is driven by a motor, a gear mechanism, and a link mechanism provided on the swing member 12. The swing member 12 is configured to reciprocate horizontally in a fixed angle range with respect to the fixed member 18. In addition, the fixing member 18
In order to easily adjust and fix the center of the horizontal rotary reciprocating motion with respect to the mounting base 4, the mounting base 4 has a cylindrical shape, and is fitted to the mounting base 4 having a column shape slightly smaller than the inner diameter thereof. It is fixed by stoppers 14a and 14b.

In order to make the fan 10 foldable, the fan base 11 is rotated about
It is rotatably mounted with respect to. Fan stand 11
In order to easily adjust the vertical angle with respect to the swing member 12, the fan base is provided with a guide groove 16,
The swing member 12 is provided with a guide pin 17 which is movably fitted along the guide groove and which can fix the fan mount. Further, the fan base 11 is provided with a fan for blowing air, a motor for driving the fan, and a protection guard if necessary.

In order to raise and lower the cylinders 3a and 3b with respect to the support 2, a wire 5 having one fixed to the upper end of the support 2 is provided.
a pulley 4a rotatably provided at the lower end of the cylindrical body 3a
And a pulley 4b rotatably provided at the upper end of the support portion 2
And mounted on the drum of the drive unit 20 attached to the support arm 6. A wire 5b, one of which is fixed to the lower end of the cylindrical body, is hooked on a pulley 4c rotatably provided at the upper end of the cylindrical body 3a, and the other is fixed to the lower end of the support portion 2.

When the wire 5a is wound by the driving device 20, the wire 5a is shortened, and the pulley 4a is pushed upward, and the cylindrical body 3a provided with the pulley 4a rises according to the winding amount of the wire 5a. In addition, since the pulley 4c also rises when the cylinder 3a rises, the distance between the pulley 4c and the lower end of the support portion 2 to which the wire 5b is fixed is increased, and the lower end of the cylinder 3b to which the other wire 5b is fixed by the lengthened distance. The distance between the portions becomes shorter and the cylinder 3b rises. When the wire is rewound by the driving device 20, the tension of the wire 5a is weakened, and the cylinder 3a descends according to the length of the unwound wire 5a due to the weight of the member above the cylinder 3a. Further, the lowering of the cylinder 3a lowers the tension of the wire 5b, and the cylinder 3b also descends by its own weight above the cylinder 3b.

The driving device 20 attached to the tip of the supporting arm 6 includes a drum 21 for winding the wire 5a, a detent pawl gear, a brake disk, and the like, a driving shaft 22 for transmitting a driving force to the drum, and the like. . On the other hand, the booster 30
Is provided with an input shaft 31 for taking in torque, large and small gears for amplifying torque, a transmission shaft 32 for transmitting the amplified torque to a wire winding device, and the like. The drive shaft 22 and the transmission shaft 32 can be connected by making the shape of the drive shaft 22 into a prism or the like, and providing the transmission shaft 32 with a square hole or the like that can fit therewith. By disposing a guide pin 33 that can be fitted into a guide hole 61 provided in the support arm 6 in the booster, the booster 30
Can be detached from the support arm 6 and the wire winding device. Further, the manual handle 70 may be attached to the drive shaft 22 when the booster 30 is not mounted. Further, by forming the input shaft 31 in the shape of a hexagonal bolt head, a general electric tool 60 can be easily mounted.

The inner periphery of the dust scraper 8a attached to the upper end of the support portion 2 is formed in the same shape as the outer circumferential shape of the cylindrical body 3a in the horizontal direction in FIGS. Sometimes, mud, dust, etc. attached to the surface of the cylinder 3a are removed when the cylinder 3a is stored in the support 2. Similarly, a dust scraper 8b attached to the upper end of the cylinder 3a removes mud, dust, and the like attached to the surface of the cylinder 3b.

Stoppers 7a and 7b are provided on the upper part of the support part 2 and the lower part of the cylinder 3a to prevent the cylinder 3a from falling out of the support 2 upward. When the cylindrical body 3a is at the uppermost position with respect to the support 2, the fitting length 2a between the cylindrical body 3a and the support 2 and the fitting length 3 between the cylindrical bodies 3a and 3b are set.
It is desirable to determine the length of the wire 5a and the positions of the stoppers 7a and 7b so that c has an appropriate length to withstand the reaction force at the time of starting the fan and the wind pressure load due to the external wind.

As shown in FIG. 6, a plurality of (two in this embodiment) large gears 34a, 34
b and the same number of small gears 35a, 35b as the large gear, and the clutch 4
0 or the like. A large gear 34a having teeth 36a is attached to the transmission shaft 32, and is rotatably attached to the frame of the booster 30. On the shaft 38, a large gear 34b having a small gear 35a formed with predetermined teeth 37a meshable with the teeth 36a of the large gear 34a on the outer peripheral side and a large gear 34b having teeth 36b are attached. Mounted as possible. The input shaft 31
A small gear 35b and a clutch 4 having predetermined teeth 37b capable of meshing with the teeth 36b of the large gear 34b are formed on the outer peripheral side.
0 and is rotatably attached to the frame of the booster 30.

The clutch 40 is shown in an exploded perspective view in FIG. The small gear 35 b is attached to the input shaft 31 so as to be rotatable and movable in the axial direction of the input shaft 31.
One is a brake disc 41a, a brake presser plate 43,
The opposite side of the nut 45 is constituted by the brake disc 41b, the brake presser plate 44, the spring 46, the spring guide 47, and the C-shaped stopper 48. The inner circumference of the brake presser plate 43
Denotes a notch 31 formed on the input shaft 31 for rotation prevention
It is formed in the same shape as a and has a width that can be fitted. On the inner periphery of the nut 95, a screw portion 45a that can be screwed with the screw portion 31b formed on the input shaft 31 is formed. Thus, the position of the brake pressing plate 43 in the axial direction of the input shaft 31 can be adjusted. C-type stopper 48
Is fitted in a ring groove 32 c formed in the input shaft 31. A force is applied to the spring 46 in a direction to repel the spring guide 47 and the brake pressing plate 44, and the nut 45 and the C-shaped stopper 48 generate a force for pressing each member incorporated in the input shaft 31 to each other. Thus, when a rotational force is applied to the input shaft 31, the brake presser plate 43 also rotates, and the small gear 35b also rotates due to the force pressing each other, and the amplified rotational force is transmitted to the transmission shaft 31 by meshing the gears.

When the rotation of the transmission shaft 32 is restricted, even if a rotational force is applied to the input shaft 31, if the force for stopping the rotational force exceeds the force for pressing the small gear 35b, the small gear 35b is applied. On the other hand, the input shaft 31 rotates.

Next, an example of how to use the elevating type defrost fan of this embodiment will be described. Cylindrical bodies 3a, 3b
When the air blower 10 is folded, the storage state (non-use state) shown in FIG. 2 is obtained. From this state, in order to use, first, the guide pins 17 for fixing the fan base 11 are used.
Loosen and adjust the vertical angle of the ventilation to fix it. next,
When the power intensifier 30 is mounted, the power tool is fitted to the input shaft, and the power tool is turned on so as to apply a rotational force in a predetermined direction, the torque of the power tool is amplified by the power intensifier 30. The drum 21 rotates and the wire is wound up by the drive device 20, and the cylinders 3 a and 3 b rise with respect to the support 2. That is, the arrangement position of the blower 10 in the height direction becomes high. Then, the lifting of the blower 10 is stopped by the stopper fittings 7a and 7b, and the rotation of the drum is stopped.
That is, a force for stopping the rotational force is applied to the small gear 35b, and the input shaft 31 idles, so that the power tool is turned off. At this time, this state is maintained by a detent provided in the wire winding device. When there are a plurality of lifting / lowering frost fans, the booster and the power tool are removed, and the lifting / lowering frost fans are extended by the same procedure. Next, when the blower is started, the blower 10 blows toward the tea ridge T while rotating and reciprocating within a predetermined range in the horizontal direction.

Next, when a working machine such as a tea picking machine W is used and the up-and-down type defrosting fan is to be stored, the cylindrical members 3a and 3b are first contracted with respect to the support portion 2. In other words, when the power intensifier 30 is mounted, the power tool is fitted to the input shaft, and the power tool is turned on so as to apply a rotational force in the opposite direction to the extension, the torque of the power tool is rotated by the power intensifier 30. The force is amplified and transmitted to the driving device 20, the drum 21 rotates, and the wire 5a is rewound from the drum 21. As a result, the tension of the wire is loosened and the cylinders 3a and 3b
To shrink. That is, the height arrangement position of the blower 10 becomes lower. The power tool is turned off with the cylinders 3a and 3b stored in the support 2. Next, fan mount 1
The guide pin 17 fixing the guide pin 17 is loosened, and the fan base is rotated so that the fan faces downward, thereby fixing the guide pin 17. In this state, since the position of the upper end of the blower is lowered, the working machine such as the tea picking machine W can straddle the elevating type frost prevention fan, so that there is no obstacle to the work.

As described above, the up-and-down type anti-frost fan of the present embodiment includes the support portion 2 that supports the cylinders 3a and 3b so as to extend and contract.
The support arm 6 is mounted above the support arm 6, and a wire winding device and a booster 30 are provided at the tip of the support arm 6, so that a commonly available electric tool can be easily mounted. Since the intensifier 30 is detachable, it can be shared by a plurality of retractable frost preventing fans, and can be manufactured at a low cost because it has a simple structure without the need for power of a motor or the like. Further, it can be easily attached and detached by the guide pin 33 and the guide hole 61. In addition, since the power tool is not locked by the clutch 40 of the booster 30, the wrist of the worker is not subjected to excessive force and is safe, and even a weak person such as a woman or an elderly person can easily work. In addition, when the battery runs out with a rechargeable power tool, the blower 10 can be raised and lowered with a manual handle 81. The booster can be operated with a power tool having a weak rotating force so that the input shaft can be operated in accordance with the amplification amount. Rotation speed increases. In this case, by removing the booster,
The number of rotations can be set to a value that allows operation with the manual handle 81.

In the above embodiment, the clutch 40 is provided in the booster 30, but may be provided in the drive. In addition, by using an electric tool having a clutch mechanism, the power consumption of the clutch mechanism can be reduced. Further, a sprocket, a chain, or the like may be used instead of the small gear and the large gear used for the booster 30.

As the expansion / contraction means, various expansion / contraction means other than the expansion / contraction means used in the embodiment can be used. Further, the configuration of the blower 10 is not limited to the configurations shown in FIGS. 1 and 2, and various configurations such as a swing mechanism and an elevation angle adjustment mechanism can be used. In addition, the frost prevention fan for preventing frost damage of agricultural products and the like has been described. Moreover, it can also be used for various uses other than the above. In that case, the invention is configured as a telescoping fan.

[0028]

As described above, by using the elevating type defrost fan according to the first aspect, a commonly available electric tool can be easily attached and operated. Thus, since it has a simple structure without requiring the power of a motor or the like individually, it can be manufactured at low cost. In addition, if the up-and-down type frost prevention fan according to claim 2 is used, since the intensifier 30 is detachable, it can be shared by a plurality of retractable frost prevention fans and can be manufactured at low cost. Further, by using the lifting type anti-frost fan according to the third aspect, the booster can be easily attached and detached. In addition, the use of the elevating type anti-frost fan according to claim 4 is safe because the power tool is not locked by the clutch 40. Further, by using the up-and-down frost prevention fan according to claim 5, it is possible to raise and lower the blower with a manual handle in an emergency such as when the battery runs out with a rechargeable power tool.

[Brief description of the drawings]

FIG. 1 is a diagram showing a use state of an embodiment of a lifting type defrost fan of the present invention.

FIG. 2 is a view showing a stored state of an elevating type frost prevention fan according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a supporting arm of one embodiment of the elevating type defrost fan of the present invention.

FIG. 4 is a perspective view of the internal configuration of a booster device according to an embodiment of the elevating type frost prevention fan of the present invention.

FIG. 5 is an exploded perspective view of a clutch mechanism according to an embodiment of the elevating type defrost fan of the present invention.

FIG. 6 is a diagram in which a defrost fan is installed in a tea garden.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevation type anti-frost fan 2 Support part 3a, 3b Cylindrical body 4a, 4b, 4c Pulley 5a, 5b Wire 6 Support arm 7a, 7b Stopper metal fitting 8a, 8b Dust scraper 10 Blower 20 Drive device 30 Intensifier 40 Clutch 60 Electric tool 70 Handwheel

Claims (6)

[Claims] 1. A support buried in a cultivated land such as a tea plantation, a cylindrical body which can be moved up and down on the support, a blower provided on the top of the cylindrical body, a support arm attached to the support, A lifting and lowering type frost prevention fan including a drum attached to an arm and capable of adjusting the amount of lifting and lowering of the cylindrical body by winding and rewinding a wire, and a booster that assists rotation of the drum. 2. The elevating type anti-frost fan according to claim 1, wherein the intensifier is detachable. 3. The elevating type defrosting fan according to claim 1, wherein the elevating type defrosting fan is provided with a fixed guide for attaching and detaching a booster. 4. The elevating type defrosting fan according to claim 1, 2 or 3, wherein the drum or the booster is provided with a clutch mechanism. 5. An elevating and lowering type defrosting fan according to claim 1, further comprising a detachable manual handle. 6. A support buried in the ground, a cylinder fitted to the support so as to be able to move up and down, a blower provided on the top of the cylinder, a support arm attached to the support, and an attachment to the support arm A lifting / lowering device including a drum capable of adjusting a vertical movement amount of the cylindrical body by winding and rewinding the wound wire;