Anti-frost fan device

Abstract

To provide an anti-frost fan device that allows rapid change of the fan orientation using a simple structure.SOLUTION: An anti-frost fan device 1 comprises: a fan 30; a swing unit 10 which has a rotation shaft 16 extending in the vertical direction, is provided on a support post 40, and performs a swinging motion by rotating around the axis of the rotation shaft 16; a frame 21 supported by the swing unit 10; and a pitch angle adjusting unit 20 including a support shaft 22, which is disposed on the frame 21 in a horizontally extending state and supports the fan 30 so as to be rotatable about its own axis, and an electrically driven cylinder 23 capable of extension and retraction, with its one end being connected to the frame 21 and the other end being connected to the fan 30, wherein the pitch angle adjusting unit adjusts the pitch angle of the fan 30 relative to the horizontal direction by extending and retracting the electrically driven cylinder 23 to rotate the fan 30 about the axis of the support shaft 22.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a frost-proof fan device. [Background technology]

[0002] Some frost-proof fan devices are provided with a depression angle adjustment unit that adjusts the depression angle of the fan relative to the horizontal direction in order to blow air in a desired direction.

[0003] For example, Patent Document 1 discloses a frost-proof fan device equipped with a depression angle adjustment unit that adjusts the depression angle of the fan by rotating a fan holder that holds the fan. This frost-proof fan device is provided with a gear provided on the fan holder and an electric motor that rotates the gear. In this frost-proof fan device, the electric motor rotates the gear to rotate the fan holder and adjust the orientation of the fan from horizontal to downward, or vice versa. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-170065 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the frost-proof fan device described in Patent Document 1 has a complex structure because it uses gears, and it is also difficult to quickly point the fan in a desired direction.

[0006] The present invention has been made to solve the above-mentioned problems, and has an object to provide a frost-proof fan device that can quickly change the direction of the fan with a simple configuration. [Means for solving the problem]

[0007] In order to achieve the above object, the frost-proof fan device according to the present invention comprises: With fans, a swing unit having a first shaft extending vertically from a position offset from the axis of the support column, the swing unit being provided on the support column and rotating about the axis of the first shaft to perform a swing operation; an elevation / depression angle adjustment unit including a first base supported by the oscillating unit, a second shaft provided on the first base while extending horizontally and supporting the fan rotatably about its own axis, and an extendable cylinder having one end connected to the first base and the other end connected to the fan, the cylinder extending and contracting to rotate the fan about the axis of the second shaft, thereby adjusting at least the elevation angle of the fan with respect to the horizontal direction; The present invention is characterized by comprising:

[0008] the one end of the cylinder is connected to the first base at a position away from the second shaft, and the other end of the cylinder is connected to the fan at a position away from a portion supported by the second shaft, The cylinder may have a rod and a first electric motor that moves the rod back and forth, and the first electric motor may move the rod back and forth to change the distance from the one end to the other end, thereby rotating the fan around the axis of the second shaft.

[0009] The first shaft is provided on a support base that protrudes horizontally from the support column, The oscillating unit may further include a second electric motor arranged within the support and having an output shaft oriented vertically, and a reducer arranged between the output shaft of the second electric motor and the first shaft. Effect of the Invention

[0010] According to the configuration of the present invention, the elevation / depression angle adjustment unit includes a first base supported by the oscillating unit, a second shaft provided on the first base in a state extending horizontally and supporting the fan rotatably about its own axis, and an extendable cylinder having one end connected to the first base and the other end connected to the fan. The cylinder extends and retracts to rotate the fan about the axis of the second shaft, thereby adjusting at least the depression angle of the fan relative to the horizontal direction. The frost-proof fan device has a simpler configuration than a depression angle adjustment unit that adjusts the depression angle of the fan relative to the horizontal direction by rotating a gear that rotates a fan holder. In addition, the frost-proof fan device can quickly change the direction of the fan. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing an example in which an anti-frost fan device according to an embodiment of the present invention is installed in a tea field. [Diagram 2] FIG. 1 is a side view showing an example in which an antifrost fan device according to an embodiment of the present invention is installed in a tea field. [Diagram 3] 1 is a left side view of an anti-frost fan device according to an embodiment of the present invention. FIG. [Figure 4] 1 is a top view of an antifrost fan device according to an embodiment of the present invention. [Diagram 5] 1 is a front view of an antifrost fan device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, a frost-proof fan device according to an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent parts are given the same reference numerals. In addition, in the orthogonal coordinate system XYZ shown in the drawings, the forward direction in which the impeller of the fan faces is the X-axis, the vertical direction in which the support column extends is the Z-axis, and the direction perpendicular to the X-axis and Z-axis is the Y-axis. In the following, this coordinate system will be referred to as appropriate in the description.

[0013] The anti-frost fan device according to the embodiment is a device that blows air into a farm field (e.g., a tea field) to protect crops (e.g., tea) grown in the farm field from frost. This anti-frost fan device is installed at the top end of a pole erected in the farm field. In order to blow air from the top end of the pole in a desired direction, the device is equipped with a swing unit and a depression angle adjustment unit.

[0014] The detailed configuration of the frost-proof fan device will be described below with reference to Figures 1 to 5. Note that the depression angle adjustment unit may adjust the elevation angle in addition to the depression angle, but the following description will be given of a configuration including a depression angle adjustment unit that adjusts only the depression angle.

[0015] 1 and 2 are a perspective view and a side view showing an example in which an antifrost fan device 1 according to an embodiment is installed in a tea field R. FIGS. 3 to 5 are a left side view, a top view, and a front view of the antifrost fan device 1 according to an embodiment. In FIG. 3, the internal configuration is shown with solid lines instead of dotted lines to facilitate understanding. Also, in FIG. 3, only the upper end portion of a support 40 erected in the field is shown.

[0016] If the field is a tea plantation, frost damage to tea during the new bud growth period can delay the plucking season and affect yield and quality. The frost-proof fan device 1 is a device that is installed in the tea plantation R to prevent frost from causing such damage, as shown in Figures 1 and 2. The frost-proof fan device 1 includes a swing unit 10, a depression angle adjustment unit 20, and a fan 30, as shown in Figures 3 to 5, to blow air throughout the entire tea plantation R.

[0017] The oscillating unit 10 is attached to a support 40 as shown in Fig. 3. In detail, the support 40 is erected in a farm field with its axis oriented vertically, although this is not shown in Fig. 3. A cylindrical member 41 is fitted to the upper end of the support 40. The oscillating unit 10 is provided on top of the cylindrical member 41 of the support 40 in this state.

[0018] Moreover, the oscillating unit 10 rotates the fan 30 about the axis of the support 40 to orient the fan 30 in a desired direction about the axis of the support 40. In other words, the oscillating unit 10 causes the fan 30 to perform an oscillating motion. To achieve this oscillating motion, the oscillating unit 10 has a motor 11, a reduction gear 12-15 that reduces the rotation speed of the motor 11, and a rotary shaft 16 that rotates by the reduction gear 12-15 to perform the oscillating motion, as shown in Fig. 3. In this specification, rotation refers to a rotational motion in both the forward and reverse directions.

[0019] Motor 11 (also referred to as a second electric motor) is fitted into the internal space of a cylindrical member 41 at the upper end of support column 40. Motor 11 has an output shaft extending in the vertical direction protruding above support column 40. Motor 11 rotates the output shaft in a forward or reverse direction when power is supplied. Reduction gear 12 is provided on the output shaft of motor 11. As a result, motor 11 rotates reduction gear 12 in a forward or reverse direction.

[0020] Each of the reduction gears 12-15 (also called speed reducers) is composed of a spur gear. The reduction gear 12 is provided coaxially with the output shaft of the motor 11. The reduction gear 12 meshes with the reduction gear 13. The reduction gear 13 meshes with the reduction gear 14, which meshes with the reduction gear 15. The diameters of the reduction gears 12-15 increase in the order of the reduction gears 12, 13, 14, and 15. The reduction gears 12-15 are arranged and shaped as described above, and thus transmit the rotation of the output shaft of the motor 11 at a reduced speed.

[0021] On the other hand, the reduction gear 15 is provided coaxially with the rotary shaft 16. Therefore, when the motor 11 rotates, the reduction gear 15 rotates the rotary shaft 16 as the rotation is transmitted to the reduction gears 12-15.

[0022] The above-mentioned oscillating unit 10 has a gear frame 17 (also called a support base) fixed to the upper end of the support 40 in order to support the reduction gears 12-15. The rotating shaft 16 (also called a first shaft) is rotatably held by a bearing 18 provided on the gear frame 17. In detail, the rotating shaft 16 is rotatably held by the bearing 18 around the axis line in a state where the axis line is oriented in the vertical direction. The output shaft of the motor 11 rotates in the forward or reverse direction, and the reduction gear 15 rotates in conjunction with the rotation, so that the rotating shaft 16 rotates in the forward or reverse direction around the axis line oriented in the vertical direction. This causes the rotating shaft 16 to perform a oscillating motion. A depression angle adjustment unit 20 is provided on the upper end of the rotating shaft 16. The rotating shaft 16 causes the depression angle adjustment unit 20 to perform a oscillating motion. As a result, the pivot shaft 16 orients the depression angle adjustment unit 20 in a desired direction.

[0023] Depression angle adjustment unit 20 adjusts the depression angle of fan 30 with respect to the horizontal direction in order to adjust the air blowing direction of fan 30. In order to adjust the depression angle, depression angle adjustment unit 20 has a base 21, a support shaft 22 that is provided on base 21 and rotatably supports fan holder 31, and an electric cylinder 23 that rotates fan holder 31 about support shaft 22 to adjust the depression angle of fan holder 31.

[0024] The platform 21 (also referred to as the first base portion) supports the members of the depression angle adjustment unit 20, such as the support shaft 22 and the electric cylinder 23. The platform 21 has a flat bottom surface in order to support these members. With the bottom surface of the platform 21 held horizontally, a portion of the platform 21 slightly forward of the center in the front-rear direction, i.e., slightly on the +Y side of the center in the Y direction, is supported by the rotating shaft 16. This causes the platform 21 to oscillate due to the oscillating motion of the rotating shaft 16. As a result, the platform 21 oscillates the support shaft 22, the electric cylinder 23, and the like, which it supports, around the rotating shaft 16. The support shaft 22 is provided at the tip portion of the platform 21, i.e., the +Y end portion.

[0025] The support shaft 22 (also referred to as the second shaft) is provided on the mount 21 with its axis directed horizontally. In detail, when the tip of the mount 21 is directed in the +Y direction, the support shaft 22 is provided on the mount 21 with its axis directed in the left-right direction, i.e., the X direction.

[0026] 4, fan holder 31 has a plate bent into a U-shape, a bracket 33 that holds motor 32 that drives fan 30 in the opening of the U-shape, and a base 34 with two plates protruding downward, i.e., toward the -Z side, from bracket 33 and with the plate surfaces facing the X direction. Furthermore, a through hole (not shown) is formed in the -Z end portion of each plate of base 34.

[0027] The support shaft 22 is inserted through these through holes (not shown). The outer diameter of the support shaft 22 is slightly smaller than the diameter of these through holes. As a result, the support shaft 22 shown in FIG. 3 supports the base 34 in a state in which it can rotate around itself. That is, it rotatably supports the fan holder 31. As described above, the support shaft 22 has an axis oriented horizontally, so that the fan holder 31 can rotate along a vertical plane. As a result, the support shaft 22 makes it possible to tilt the fan holder 31 up and down. On the other hand, the base 21 is provided with an electric cylinder 23 as shown in FIG. 3 and FIG. 4 in order to tilt the fan holder 31 in a desired depression angle direction.

[0028] The electric cylinder 23 (also simply referred to as a cylinder) has a motor 24 (also referred to as a first electric motor), a power conversion mechanism (e.g., a ball screw) not shown that converts the rotation of the motor 24 into linear motion, and a rod 25 that moves back and forth by the power conversion mechanism.

[0029] As shown in FIG. 3, the fan holder 31 is provided with a protrusion 36 that protrudes downward from the support plate 35 of the bracket 33 to a smaller extent than the base 34. The protrusion 36 is disposed between two plates of the base 34 shown in FIG. 4, the plate surfaces of which face in the X direction. Furthermore, as shown in FIG. 3, the protrusion 36 is provided with a pin 26 that penetrates in the X direction. The tip of the rod 25 of the electric cylinder 23, i.e., the +Y end, is connected to the protrusion 36 by the pin 26. The +Y end of the rod 25 is rotatable around the pin 26. Meanwhile, the -Y end portion of the stand 21 is provided with a pin 27 (also called a clevis pin) that extends in the X direction. The base end of the electric cylinder 23, i.e., the -Y end, is connected to the -Y end portion of the stand 21 by the pin 27. In this connection, the -Y end of the electric cylinder 23 is rotatable around the pin 27.

[0030] With this configuration, the electric cylinder 23 advances and retreats the rod 25 to change the distance between the protrusion 36 of the fan holder 31 and the -Y end portion of the stand 21. As a result, the electric cylinder 23 rotates the fan holder 31 about the axis of the support shaft 22. In this way, the electric cylinder 23 adjusts the elevation angle of the fan holder 31 with respect to the horizontal direction.

[0031] At this time, a guide groove 37 is formed in the base 34 of the fan holder 31 by cutting out the plate of the base 34 in the shape of an arc centered on the support shaft 22. Furthermore, the fixed shaft 28 fixed to the stand 21 passes through the guide groove 37. Furthermore, the width of the guide groove 37 is larger than the outer diameter of the fixed shaft 28. As a result, when the electric cylinder 23 rotates the fan holder 31 as described above, the guide groove 37 moves relative to the fixed shaft 28 with the fixed shaft 28 still inserted. Thereby, the guide groove 37 rotates the fan holder 31 along an arc centered on the support shaft 22. As a result, the fan holder 31 is less likely to rattle when rotating. That is, rattling is prevented when the elevation angle is adjusted in the fan holder 31. Furthermore, the elevation angle of the fan holder 31 is adjusted more accurately.

[0032] The fan holder 31 holds the fan 30. In detail, as shown in FIG. 4 and FIG. 5, the fan 30 has an impeller 38 and a motor 32 that supports the impeller 38 from the -Y side and rotates the impeller 38. The fan holder 31 holds the motor 32. The electric cylinder 23 of the depression angle adjustment unit 20 shown in FIG. 3 adjusts the elevation angle of the fan holder 31 with respect to the horizontal direction, thereby adjusting the direction of the rotation axis of the impeller 38 and adjusting the wind direction. As a result, the fan 30 blows wind in a desired downward direction. The fan 30 is provided at the upper end of a support 40 erected in a farm field, for example, a tea plantation R shown in FIG. 2, so that the fan 30 blows wind in a desired downward direction to a desired location in the farm field. As a result, the fan 30 can prevent a decrease in yield and quality during the plucking season due to frost damage.

[0033] To adjust the depression angle of the fan 30, the electric cylinder 23 adjusts the depression angle of the fan 30 with respect to the horizontal direction simply by moving the rod 25 forward and backward. Therefore, in the frost-proof fan device 1, the air blowing direction can be easily adjusted. Also, the air blowing direction can be adjusted quickly. Furthermore, the configuration is simple because the tip and base ends of the electric cylinder 23 are connected to the fan holder 31 and the stand 21, and the fan holder 31 is simply supported by the stand 21 so that it can be rotated.

[0034] As described above, in the frost-proof fan device 1 according to the embodiment, the depression angle adjustment unit 20 includes the base 21 supported by the rotating shaft 16, the support shaft 22 that is provided on the base 21 in a state of extending horizontally and supports the fan holder 31 rotatably about its own axis, and the extendable electric cylinder 23 that has one end connected to the base 21 and the other end connected to the fan holder 31. The rod 25 of the electric cylinder 23 advances and retreats to rotate the fan holder 31 about the axis of the support shaft 22, thereby adjusting the depression angle of the rotation shaft of the impeller 38 of the fan 30 with respect to the horizontal direction. For this reason, the configuration is simpler than that of the frost-proof fan device including the depression angle adjustment unit that adjusts the depression angle of the fan by rotating the fan holder by rotating the gear described in Patent Document 1.

[0035] The depression angle of the fan 30 can be adjusted simply by advancing and retracting the rod 25 of the electric cylinder 23. Therefore, in the frost-proof fan device 1, the orientation of the fan 30 can be quickly changed.

[0036] Although the frost-proof fan device 1 according to the embodiment of the present invention has been described above, the present invention is not limited to this. For example, in the embodiment, the fan 30 is held by the fan holder 31, but the present invention is not limited to this. In the present invention, the presence or absence of the fan holder 31 is optional. For example, the housing of the motor 32 of the fan 30 itself may be held by the depression angle adjustment unit 20.

[0037] In the embodiment, the oscillating unit 10 includes a gear frame 17 that protrudes laterally and horizontally from the support 40, but the present invention is not limited to this. In the present invention, the oscillating unit 10 may be anything that extends vertically from a position offset from the axis of the support 40, supports the stand 21, in other words, has a first shaft that supports the first base portion, is provided on the support 40, and performs a oscillating operation by rotating around the axis of the first shaft. Therefore, the shape of the gear frame 17 is arbitrary. For example, the gear frame 17 may be a box shape that protrudes on both sides of the support 40.

[0038] In the embodiment, the oscillating unit 10 includes the reduction gear 12-15, but the present invention is not limited thereto. As described above, the oscillating unit 10 may be any unit that extends vertically from a position offset from the axis of the support 40, has a first shaft that supports the first base portion, is mounted on the support 40, and performs the oscillating operation by rotating around the axis of the first shaft. Therefore, the presence or absence of the reduction gear 12-15, the number of the reduction gears 12-15, and their shapes are arbitrary. For example, the number of the reduction gears 12-15 included in the oscillating unit 10 may be changed according to the speed, accuracy, etc. of positioning, and may be more than that of the embodiment. The reduction gear 12-15 may be a reducer other than a gear.

[0039] In the embodiment, the depression angle adjustment unit 20 has the fan 30 facing horizontally or downward from the horizontal direction, but in the present invention, in addition to this, the fan 30 may be facing upward from the horizontal direction. In short, in the present invention, the depression angle adjustment unit 20 only needs to be a unit that adjusts at least the depression angle, and as a result, the elevation angle may be adjusted in addition to the depression angle. In that case, the depression angle adjustment unit 20 may be what is called an elevation / depression angle adjustment unit. In other words, the depression angle adjustment unit 20 may include what is called an elevation / depression angle adjustment unit.

[0040] The present invention allows various embodiments and modifications without departing from the broad spirit and scope of the present invention. The above-described embodiments are for the purpose of explaining the present invention and do not limit the scope of the present invention. In other words, the scope of the present invention is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and within the scope of the meaning of the invention equivalent thereto are considered to be within the scope of the present invention. [Explanation of symbols]

[0041] 1...Frost prevention fan device 10... Swing unit 11...Motor (second electric motor) 12-15…Reduction gear (reduction gear) 16...Rotation axis (first axis) 17...Gear frame (support) 18...Bearing 20 Depression angle adjustment unit 21... Stand (first base part) 22...Support shaft (second shaft) 23...Electric cylinder (cylinder) 24...Motor (first electric motor) 25…Rod 26,27…Pin 28…Fixed axis 30…Fan 31...Fan holder 32…Motor 33…Bracket 34…Bass 35...Support plate 36…Protrusion 37...Guide groove 38…Impeller 40…post 41...Cylindrical member R...Tea field

Claims

1. With fans, a swing unit having a first shaft extending in a vertical direction from a position offset from the axis of the support column, the swing unit being provided on the support column and rotating about the axis of the first shaft to perform a swing operation; an elevation / depression angle adjustment unit including a first base supported by the oscillating unit, a second shaft provided on the first base while extending horizontally and supporting the fan rotatably about its own axis, and an extendable cylinder having one end connected to the first base and the other end connected to the fan, the cylinder extending and contracting to rotate the fan about the axis of the second shaft, thereby adjusting at least the elevation angle of the fan with respect to the horizontal direction; An anti-frost fan device comprising:

2. the one end of the cylinder is connected to the first base portion at a position away from the second shaft, and the other end of the cylinder is connected to the fan at a position away from a portion supported by the second shaft, The cylinder has a rod and a first electric motor that moves the rod back and forth, and the first electric motor moves the rod back and forth to change the distance from the one end to the other end, thereby rotating the fan around the axis of the second shaft. The frost-proof fan device according to claim 1.

3. The first shaft is provided on a support base that protrudes horizontally from the support column, The oscillating unit further includes a second motor arranged in the support and having an output shaft oriented vertically, and a reducer arranged between the output shaft of the second motor and the first shaft. The frost-proof fan device according to claim 1 or 2.

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