JP5624292B2 - Watering screen equipment - Google Patents

Description

  The present invention relates to a water spray screen device that sprays water on a screen outdoors or indoors and cools an outdoor space or indoor space by vaporization heat or radiant cooling heat accompanying water evaporation.

  Conventionally, as a technique for cooling an outdoor space, for example, mist spraying in which water is made into a fine mist and sprayed in the air is known. In addition, the pavement is designed to retain the water in the porous pavement block, the sand layer or the roadbed under the porous pavement block, and to ooze the water to the surface of the pavement block by the capillary action of the pavement block material to obtain the water hitting effect. The road is also known.

  However, mist spraying is easily affected by the wind, and the mist is diffused by the wind and the cooling effect is significantly reduced. Moreover, in the paved road aiming at the water hitting effect, the water that oozes out on the surface of the paved block only reduces the temperature of the paved block having a large heat capacity due to the heat of vaporization. Therefore, both of the above prior arts cannot effectively cool the outdoor space.

  On the other hand, for example, a cooling curtain or a net-like shield as disclosed in Patent Document 1 and Patent Document 2 has been proposed. In the conventional configuration described in Patent Document 1, water is supplied from the water tank to the upper part of the curtain suspended outdoors, and the entire curtain is wetted. And water is evaporated from the whole curtain, and ambient air is cooled by the heat of vaporization.

  Further, in the conventional configuration described in Patent Document 2, the mesh shield is wetted by supplying water from the water tank to the upper portion of the mesh shield used as a blind or a shutter. Then, water is evaporated from the mesh shield, and the ambient air is cooled by the heat of vaporization.

Utility Model Registration No. 3034820 JP 2008-25142 A

  The curtains and reticulated shields of Patent Document 1 and Patent Document 2 are provided in place without being rolled up. However, it is also possible to support the curtain and the net-like shield on, for example, a winding shaft and wind up by rotating the winding shaft. If comprised in this way, the motor for rotating a winding axis will be needed, and the motor will be provided in the flame | frame which supports a winding axis. Therefore, in such a configuration, the motor protrudes from the frame in the vicinity of the winding shaft, which not only deteriorates the appearance of the apparatus but also may increase the outer shape of the apparatus.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a watering screen device in which a motor for driving the movement of the screen can be conveniently stored in the device without protruding outside.

In order to achieve the above object, the present invention supports a plurality of rotating shafts in parallel on a frame having a rectangular frame shape , loops a screen between the rotating shafts, and stretches the back surface of the screen. A watering device for spraying water is provided inside the screen, and a motor for rotating the rotating shaft is housed in the rotating shaft.

  Therefore, in the present invention, when the rotating shaft is rotated by the motor, the screen stretched between the rotating shafts is moved. At the same time, water is sprayed from the watering device to the screen to wet the screen. As the screen moves, water is vaporized by the air in contact with the screen, heat of vaporization is taken away from the air, and a radiant cooling effect can be given to the surroundings.

  And in this invention, the motor for rotating a rotating shaft is accommodated in the rotating shaft. For this reason, it is possible to prevent the motor from projecting to the outside of the frame, the entire watering screen device can be configured compactly, and the appearance of the device can be improved.

In the above configuration, the motor is preferably supported by the frame.
Further, in the above configuration, the power supply line for the motor is accommodated in the frame, and a water blocking structure is provided between the rotating shaft and the frame so that water used for water spray does not enter the frame. It is good to. When comprised in this way, it can prevent that the water used for watering falls on the motor in a flame | frame or a feeder.

  As described above, according to the present invention, it is possible to prevent the motor for rotating the rotation shaft from projecting to the outside of the frame, and it is possible to make the entire watering screen device compact and good in appearance. Demonstrate.

The perspective view which shows the watering screen apparatus of one Embodiment. The principal part longitudinal cross-sectional view of the watering screen apparatus of FIG. The partial expanded sectional view in the 3-3 line of FIG. FIG. 4 is a partially enlarged cross-sectional view taken along line 4-4 of FIG. The fragmentary sectional view which expands and shows the support structure of the motor in the upper rotating shaft in the watering screen apparatus of FIG. The fragmentary sectional view in the 6-6 line of FIG. The fragmentary sectional view in the 7-7 line | wire of FIG. The fragmentary sectional view which expands and shows the support structure of the upper rotating shaft on the opposite side to the motor in the watering screen apparatus of FIG. The fragmentary sectional view which expands and shows the support structure of the lower rotating shaft in the watering screen apparatus of FIG. The fragmentary sectional view in the 10-10 line of FIG.

  Hereinafter, an embodiment of a watering screen device embodying the present invention will be described with reference to the drawings. First, the basic structure of the watering screen device of this embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the watering screen device of this embodiment includes a box-shaped support base 28 and a frame 21 installed on the upper surface of the support base 28. The frame 21 is installed between a pair of left and right support columns 22 and 23 extending in parallel with each other, an upper frame portion 24 installed between the upper end portions of both support columns 22 and 23, and a lower end portion of both support columns 22 and 23. The lower frame portion 25 is configured to form a square frame shape as a whole. Here, the left and right refer to the left and right in the drawing for the sake of convenience, and are not limited.

  As shown in FIG. 4, both the struts 22 and 23 are made of a stainless steel material having a C-shaped cross section, and are arranged in a state where the opening portion is on the outside. A cover 26 is detachably attached to the outer openings of the columns 22 and 23 by a plurality of screws 27. As shown in FIG. 3, the upper frame portion 24 is made of a stainless steel material having a C-shaped cross section, and is arranged with its opening portion on the lower side. The lower frame portion 25 is made of a stainless steel material having a C-shaped cross section, and is arranged with its opening portion facing upward. The lower frame portion 25 constitutes a gutter member for receiving water sprinkled from a sprinkler 44 described later.

  Mounting plate portions 22a and 23a are fixed to the lower ends of the support columns 22 and 23 by welding. Then, as shown in FIG. 3, the attachment plate portions 22 a and 23 a of the support columns 22 and 23 are attached to the upper surface of the support base 28 by a plurality of bolts 29, so that the lower portion of the frame 21 and the support base 28 can be attached and detached. It is fixed to.

  A cylindrical upper rotary shaft 30 is supported between the upper end portions of both supports 22 and 23 in the upper frame portion 24 so as to be rotatable and located in a horizontal plane. A cylindrical lower rotating shaft 31 is supported between the lower end portions of both supports 22 and 23 in the lower frame portion 25 so as to be rotatable and to extend in parallel with the upper rotating shaft 30. An annular screen 32 is stretched between the rotary shafts 30 and 31. The screen 32 is made of a cloth material made of warps and wefts, and the surface of the screen 32 displays advertising advertisements. A narrow gap of about 0.3 to 3 mm is formed between the warp and weft of the screen 32.

  A motor 33 is supported on the inner surface of the upper end of the left column 22 in a state where almost the entire motor 33 is accommodated in the upper rotary shaft 30. Then, when the upper rotary shaft 30 is rotated by the motor 33, the screen 32 is circulated between the rotary shafts 30 and 31. A pair of L-shaped guide plates 54 are fixed to the inner side surfaces of the support columns 22 and 23 between the rotary shafts 30 and 31 so as to extend in parallel in the vertical direction. These guide plates 54 are engaged with the back side (inner surface side) of the left and right end edges of the screen 32 to guide the circumferential movement of the screen 32. In the screen 32, left and right width end portions are positioned by flange portions 72, 81, 85, which will be described later, at both ends of both rotary shafts 30, 31, and the left and right positions of the screen 32 are regulated.

  An operation panel 34 is provided on the outer surface of the left column 22. On this operation panel 34, a switching knob 35 for switching the operation of the apparatus between automatic and manual, an operation start button 36, an operation stop button 37, a normal rotation button 38 for normal rotation of the screen 32, a screen A reverse rotation button 39 for reversing 32 and an emergency stop button 40 for emergency stop of the operation of the apparatus are provided.

  As shown in FIG. 4, two power supply lines 41 for driving power supply and control for the motor 33 and the operation panel 34 are accommodated in the left column 22. On the left side surface of the support base 28, a connector 42 for the both feed lines 41 is provided. The external power supply line 43 is connected to both the connectors 42 to supply power to the motor 33 and the operation panel 34 via the power supply line 41.

  A watering device 44 is supported between the support columns 22 and 23 in the surrounding area of the screen 32. The watering device 44 includes a square pipe-shaped water guide pipe 45 made of stainless steel provided between the support columns 22 and 23, and a plurality of water pipes projecting from the outer peripheral surface of the water pipe 45 at predetermined intervals in the length direction. Mist injection nozzle 46. A water supply hose 47 for supplying water to the water conduit 45 of the watering device 44 is accommodated in the right column 23. A connection port 48 is provided on the right side surface of the support base 28, and a lower end portion of the water supply hose 47 is connected to the connection port 48 in the support base 28. In addition, an external water supply hose 49 extending from a water pipe (not shown) is connected to the connection port 48.

  Then, an unillustrated electromagnetic valve connected to the water supply hose 47 is opened in the right column 23 to supply water into the water conduit 45 of the watering device 44. For this reason, water is sprayed in a mist form from each mist spray nozzle 46 to the back side of the front surface of the screen 32. And when this water is vaporized, the heat of vaporization is taken from the air and the surrounding air is cooled. Further, the surface of the screen 32 becomes a cold radiation surface, and a radiation cold heat effect is given to the surroundings.

  A drainage hose 50 as a drainage part is connected to the lower left part of the lower frame part 25 of the frame 21 via a joint 51. A connection port 52 is provided on the left side surface of the support base 28, and a lower end portion of the drainage hose 50 is connected to the connection port 52 in the support base 28. Further, a drainage extension hose 53 extending to a drainage channel (not shown) is connected to the connection port 52. Then, the water sprayed from the watering device 44 to the screen 32 and flowing down along the front surface or the back surface of the screen 32 is collected in the lower frame portion 25 as a gutter member, and then passed through the drainage hose 50. Discharged.

Next, the configuration of the motor 33 and the upper rotary shaft 30 for rotating the upper rotary shaft 30 and related mechanisms will be described in detail with reference to FIG.
As shown in FIGS. 5 to 7, a U-shaped concave portion 60 for inserting the left end portion of the upper rotary shaft 30 is formed on the upper inner surface of the left column 22 in the frame 21. The motor 33 housed inside the left end of the upper rotary shaft 30 is constituted by a tubular motor in which a drive mechanism such as a stator and a rotor is built in a tubular motor case 61, and the entire motor case 61 is formed in the upper rotary shaft 30. Has been inserted.

  As shown in FIG. 5, a mounting flange 62 having a larger diameter than the motor case 61 is fixed to the base end portion of the motor case 61, and a connecting shaft portion 62 a having a square cross section projects from the end surface of the mounting flange 62. It is installed. The mounting flange 62 is supported by a left position adjusting mechanism 65 (described later) so that the position can be adjusted in the vertical direction perpendicular to the axis of the upper rotary shaft 30 inside the upper end of the left column 22. A large-diameter driving roller 63 projects from the tip of the motor case 61, and the outer periphery of the driving roller 63 is fixed to the inner periphery of the upper rotary shaft 30. An annular free roller 64 for rotatably supporting the distal end portion of the upper rotary shaft 30 is supported on the outer periphery of the base end of the motor case 61.

  As shown in FIG. 5, in the left position adjustment mechanism 65 for adjusting the position of the motor 33, a mounting plate 66 having an inverted L-shaped cross section is fixed inside the upper end of the left column 22 by a bolt (not shown). Below the mounting plate 66, a receiving plate 67 is disposed in the left column 22 so as to be movable in the vertical direction, and a pair of nuts 68 are fixed to the lower surface of the receiving plate 67 by welding. A support plate 69 having an inverted L-shaped cross section is fixed to the upper surface of the receiving plate 67 by welding, and the support plate 69 has a rectangular connecting hole engageable with a connecting shaft portion 62a on the mounting flange 62 of the motor case 61. 69a is formed. The support plate 69 is fixed to the end face of the mounting flange 62 of the motor case 61 with a bolt (not shown) in the engaged state of the connecting shaft portion 62a with the connecting hole 69a.

  A pair of adjusting bolts 70 are rotatably supported in the holes of the mounting plate 66. In this state, the heads of the adjusting bolts 70 engage with the upper surface of the mounting plate 66, and the lower ends of the adjusting bolts 70 pass through the holes of the support plate 69 and the receiving plate 67 and screw into the nut 68. Are combined. And when slack occurs in the screen 32 with the use of the watering screen device, the adjustment bolt 70 is rotated and adjusted with the upper frame portion 24 removed from between the upper ends of both supports 22 and 23. The support plate 69 is moved vertically by the action of the adjusting bolt 70 and the nut 68. By this movement, the support position of the left end portion of the motor 33 and the upper rotary shaft 30 with respect to the left column 22 is changed, and the screen 32 is restored to the tension state. The restoration to the tension state on the right column 23 side is the same, and this will be described later.

  A water blocking structure 71 is provided between the left end portion of the upper rotating shaft 30 and the left column 22. That is, the flange portion 72 is fixed to the left end outer periphery of the upper rotary shaft 30. A water blocking plate 73 is attached to the upper inner surface of the left column 22 so as to be adjacent to the flange portion 72 so that the position can be adjusted in the vertical direction by screws 74 inserted into the pair of long holes 73a. The water blocking plate 73 has a packing structure in which a surface of the stainless steel plate on the left column 22 side is coated with rubber, and the upper portion thereof is adjacent to the outer periphery of the left end of the upper rotary shaft 30 from the lower side outside the flange portion 72. In addition, a closing portion 73b for closing the lower portion of the recess 60 is formed.

  Then, the movement of water from the screen 32 side on the upper rotary shaft 30 to the left end side of the upper rotary shaft 30 is blocked by the flange portion 72 and the water blocking plate 73, and water enters the left column 22. Can be prevented. For this reason, it is possible to prevent water from falling on the motor 33 accommodated in the upper rotary shaft 30 and the power supply line 41 accommodated in the left column 22. Further, when adjusting the positions of the motor 33 and the left end of the upper rotary shaft 30, the position of the water blocking plate 73 is adjusted in the vertical direction following the position adjustment movement, so that the upper rotary shaft 30 and the left column 22 Is maintained in a water blocking state. That is, the water blocking plate 73 constitutes a maintaining member for maintaining the water blocking state.

  As shown in FIG. 8, the right end portion of the upper rotary shaft 30 is supported by the right position adjusting mechanism 75 so that the position of the right end portion can be adjusted in the vertical direction perpendicular to the axis of the upper rotary shaft 30 inside the upper end of the right column 23. Has been. The right side position adjusting mechanism 75 includes a mounting plate 76 and a receiving plate that have substantially the same structure as the mounting plate 66, the receiving plate 67, the nut 68, the support plate 69, the adjusting bolt 70, and the water blocking plate 73 of the left side position adjusting mechanism 65. 77, a nut 78, a support plate 79, an adjusting bolt 80, and a water blocking plate 55. A mounting plate 76 is fixed inside the upper end of the right column 23, and a receiving plate 77 is disposed below the mounting plate 76 in the right column 23 so as to be movable in the vertical direction.

  As shown in FIG. 8, a flange portion 81 is fixed to the right end surface of the upper rotary shaft 30, and a support shaft 82 is fixed to the center of the flange portion 81. A ball bearing 83 is attached to the support plate 79 of the right position adjustment mechanism 75 via a ball bearing case 84 or the like, and the support shaft 82 is supported by the inner race of the ball bearing 83. When the screen 32 becomes slack with the use of the watering screen device, the right position adjusting mechanism 75 is adjusted to adjust the right column 23 with respect to the right position adjusting mechanism 75 in the same manner as the left position adjusting mechanism 65. The support position of the right end portion of the upper rotary shaft 30 is changed, and the screen 32 is restored to the tension state.

  Further, the flanged portion 81 of the rotating shaft 30 and the water blocking plate 55 prevent the sprayed water from entering the right column 23, so that the electromagnetic valve and its power supply line in the right column 23 can be supplied with water. Can be prevented from falling. When the rotary shaft 30 is adjusted upward due to tension of the screen 32, the water blocking plate 55 can be adjusted by loosening the screw 56 to maintain the water blocking state.

  Next, the support structure of the lower rotary shaft 31 and the related configuration will be described in detail. Note that the left and right ends of the lower rotary shaft 31 are supported on both side supports 22 and 23 of the frame 21 by the same configuration. Therefore, only the support structure of the right end portion of the lower rotating shaft 31 is illustrated, and a description is added based on the illustration, and the detailed description on the left end side is omitted.

  As shown in FIGS. 9 and 10, a flange portion 85 is fixed to the end surface of the lower rotating shaft 31, and a ball bearing 86 is attached to the center of the flange portion 85. A mounting plate 87 is mounted on the inner surfaces of the lower ends of both supports 22 and 23 by a plurality of bolts 88, and a support shaft 89 is fixed to the center of the mounting plate 87. The support shaft 89 is inserted into the inner race of the ball bearing 86 through the holes on the inner side surfaces of the columns 22 and 23, so that both ends of the lower rotating shaft 31 can rotate between the columns 22 and 23. It is supported by.

  A water blocking structure 90 is provided between both ends of the lower rotating shaft 31 and the support columns 22 and 23. That is, the water blocking plate 91 is fastened and fixed to the inner side surfaces of the support columns 22 and 23 by the bolts 88 corresponding to the flange portions 85 at both ends of the lower rotary shaft 31. The water blocking plate 91 has a packing structure in which a surface of the stainless steel plate on the side of the columns 22 and 23 is coated with rubber. A blocking portion 91a is formed on the outer periphery of the portion and is close from above. Further, a waterproof caulking material 92 is filled between the inner surface of the guide plate 54 and both side edges of the water blocking plate 91 so as to block water from above. Then, the movement of water from the screen 32 side on the lower rotary shaft 31 to the both end sides of the lower rotary shaft 31 is blocked by the flange portion 85 and the water blocking plate 91, and water into the columns 22 and 23 is blocked. Intrusion can be prevented. For this reason, it is possible to prevent the water from falling on the power supply line 41 accommodated in the left column 22 or the electromagnetic valve accommodated in the right column 23.

Next, the operation of the watering screen device configured as described above will be described.
Now, when the operation start button 36 on the operation panel 34 is turned on in a state where the watering screen device is installed outdoors or the like, the upper rotary shaft 30 is rotated by the motor 33 so that the rotary shafts 30 and 31 are separated. The screen 32 stretched around is moved around every half time at regular intervals (for example, every minute). At the same time, water is sprayed in the form of mist from the mist spray nozzle 46 of the water sprinkler 44 to the back side of the screen 32, and the entire surface of the screen 32 is wetted. Then, when water is vaporized and heat of vaporization is taken away from the air, the air is cooled and a radiant cooling effect is given to the surroundings.

  In this case, the water sprayed on the screen 32 from the mist spray nozzle 46 of the watering device 44 and flowing down along the surface of the screen 32 is collected in the lower frame portion 25 as a dredging member, and then drained hose. It is discharged to the outside through 50. Therefore, it can be avoided that the water flowing down from the screen 32 accumulates or spreads around the place where the watering screen device is installed, and hinders walking or the like.

In this embodiment, the following effects can be obtained.
(1) In this embodiment, the motor 33 for rotating the upper rotary shaft 30 is constituted by a tubular motor, and is supported on the column 22 of the frame 21 while being accommodated in the upper rotary shaft 30. For this reason, the motor 33 does not protrude to the outside of the frame 21, and the entire watering screen device can be configured compactly, and the appearance of the device can be kept good.

  (2) In this embodiment, water blocking structures 71 and 90 are provided between the upper rotating shaft 30 and the support columns 22 and 23 that house the motor 33 and between the lower rotating shaft 31 and the support columns 22 and 23. Yes. For this reason, it is possible to prevent the water used for watering from falling on the motor 33 in the upper rotary shaft 30, the power supply line 41 in the support columns 22 and 23, and the like.

  (3) Moreover, since the water blocking structures 71 and 90 do not use a ring-shaped seal packing that stops water around the shaft, it is possible to prevent an excessive load from being applied to the rotational drive of the motor 33. There is no fear of wear damage and the durability is excellent.

  (4) In this embodiment, the upper rotating shaft 30 is supported by the position adjusting mechanisms 65 and 75 so that the position of the upper rotating shaft 30 can be adjusted in the direction perpendicular to the axis of the rotating shaft 30 with respect to the support columns 22 and 23 of the frame 21. . For this reason, when the screen 32 is slackened due to the use of the watering screen device, the position adjustment mechanism 65, 75 adjusts the position of the upper rotary shaft 30 in the upward direction perpendicular to the axis line, thereby making the screen 32. Can be restored to tension.

  (5) In this embodiment, water blocking plates 73 and 55 as maintenance members for maintaining the water blocking state by moving to the water blocking structures 71 and 90 following the position adjustment movement of the upper rotary shaft 30 are provided. Is provided. Therefore, when the position of the upper rotary shaft 30 is adjusted, the water blocking plate 73 is moved following the position adjustment movement, so that the water blocking state between the upper rotary shaft 30 and the column 22 can be maintained. .

  (6) By providing the guide plate 54 inside the support columns 22 and 23, not only can the guide plate 54 guide the movement of the screen 32, but also water spray can be discharged directly to the outside without passing through the screen 32. I can stop. Therefore, useless watering can be prevented.

  (7) Since the motor 33 in the rotating shaft 30 is cooled via the rotating shaft 30 due to vaporization heat or the like in the screen 32, even if the motor 33 is inserted into the rotating shaft 30 in a sealed state, overheating can be suppressed. It is possible to prevent malfunctions and damages of the device.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
The motor 33 is supported on the left column 22 while being accommodated inside the left end of the lower rotating shaft 31, or is supported on the right column 23 while being accommodated inside the right end of the lower rotating shaft 31.

In the above embodiment, the two upper and lower rotating shafts 30 and 31 are provided.
In the above embodiment, the screen 32 is configured in an endless annular shape, but is configured in a band shape having an end. In this case, both ends of the screen 32 are wound around the rotation shaft.

-Use a motor whose outer casing is rotated, and fix the casing to the inner peripheral surface of the rotating shaft 30.
-Change the vertical position of the sprinkler 44 and the spray direction of the mist spray nozzle 46 as appropriate.

-Use a screen or knitted sheet as the screen 32.
(Other technical ideas)
An example of the technical idea that can be grasped from the embodiment but cannot be described as claims is shown below.

(A) The watering screen device according to claim 1 or 2, wherein the rotating shaft is supported so that the position of the rotating shaft can be adjusted in a direction orthogonal to the axis.
In the case of such a configuration, when the screen becomes slack as the apparatus is used, the screen can be restored to the tension state by adjusting the position of the rotation axis in the direction orthogonal to the axis.

  (B) In the technical idea (A), the water blocking structure is provided with a maintaining member for maintaining the water blocking state by following the position adjustment movement of the rotating shaft. Watering screen device.

  In such a configuration, when the position of the rotating shaft is adjusted, the maintenance member is moved following the position adjusting movement to maintain the water blocking state between the rotating shaft and the frame.

  (C) The water blocking structure is constituted by a flange provided at an end of the rotating shaft and a water blocking plate provided on the opposite side of the frame through the flange so as to cover the flange. 1-3, The watering screen apparatus as described in any one of the said technical thought (A) term and (B) term.

  If comprised in this way, since it is not necessary to use a ring-shaped seal packing, there is no fear of abrasion damage and it will be excellent in durability.

  21 ... Frame, 22 ... Left column, 23 ... Right column, 24 ... Upper frame, 25 ... Lower frame, 30 ... Upper rotary shaft, 31 ... Lower rotary shaft, 32 ... Screen, 33 ... Motor, 34 ... Operation panel , 41 ... feeder line, 44 ... sprinkler, 45 ... water conduit, 46 ... mist injection nozzle, 55 ... water blocking plate, 61 ... motor case, 63 ... drive shaft, 64 ... free roller, 65 ... left side position adjustment mechanism, 66 ... Mounting plate, 69 ... Support plate, 70 ... Adjustment bolt, 71 ... Water blocking structure, 73 ... Water blocking plate as maintenance member, 75 ... Right position adjusting mechanism, 76 ... Mounting plate, 79 ... Support plate, 80 ... Adjustment bolt, 90 ... water blocking structure, 91 ... water blocking plate.

Claims (3)

A plurality of rotating shafts are supported in parallel by a frame having a rectangular frame shape, and a screen is looped between the rotating shafts so as to be stretched, and a watering device for spraying water on the back surface of the screen is provided on the screen. A watering screen device characterized in that a motor for rotating the rotating shaft is housed inside the rotating shaft. The watering screen device according to claim 1, wherein the motor is supported by the frame. The power supply line for the motor is accommodated in the frame, and a water blocking structure is provided between the rotating shaft and the frame so that water used for water spray does not enter the frame. The watering screen apparatus according to claim 1 or 2.

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