Patent Application
20200360961
The present invention relates to a fountain apparatus, and more particularly, it relates to a fountain apparatus including rotating water jet nozzles.
In general, a fountain apparatus including rotating water jet nozzles is known. Such a fountain apparatus is disclosed in Japanese Patent Laid-Open No. 5-068921, for example.
Japanese Patent Laid-Open No. 5-068921 discloses a fountain apparatus including a submersible pump, a fountain nozzle, a motor, and a tubular rotating shaft with which the fountain nozzle is attached and that supplies water from the submersible pump to the fountain nozzle. The motor functions as a drive that rotationally drives the rotating shaft. The motor is configured to rotate the rotating shaft via a plurality of gears. The rotating shaft is configured to rotate the fountain nozzle by being rotated by the motor.
However, the fountain apparatus described in Japanese Patent Laid-Open No. 5-068921 needs to include the motor as a drive and the plurality of gears in order to rotate the fountain nozzle, and the number of components disadvantageously increases. Therefore, there are problems that the size of the fountain apparatus increases and the apparatus structure becomes complicated.
The present invention has been proposed in order to solve the aforementioned problems, and an object of the present invention is to provide a fountain apparatus in which an increase in its size can be significantly reduced or prevented, and its complicated structure can be significantly reduced or prevented.
In order to attain the aforementioned object, a fountain apparatus according to an aspect of the present invention includes a submersible pump, a water supply pipe including one end connected to a discharge port of the submersible pump, a rotating mechanism including a rotating shaft and a water jet nozzle configured to jet water supplied through the water supply pipe, and a support mechanism provided at the other end of the water supply pipe and configured to rotatably support the rotating mechanism via the rotating shaft. The water jet nozzle includes a first jet nozzle configured to jet the water in a jetting direction having a propulsive force component in a circumferential direction of the rotating shaft.
In the fountain apparatus according to this aspect of the present invention, as described above, the first jet nozzle jets the water in the jetting direction having the propulsive force component in the circumferential direction of the rotating shaft such that a rotational force can be applied to the rotating mechanism. That is, the water can be jetted while the rotating mechanism is rotated without providing a dedicated drive mechanism for rotating the rotating mechanism in addition to the submersible pump that supplies water to the rotating mechanism in the fountain apparatus. Therefore, it is not necessary to provide a motor and a plurality of gears as a drive that rotates the rotating mechanism as in the prior art, and thus an increase in the number of components can be significantly reduced or prevented. Consequently, an increase in the size of the apparatus can be significantly reduced or prevented, and the complicated apparatus structure can be significantly reduced or prevented.
In the aforementioned fountain apparatus according to this aspect, the first jet nozzle preferably includes a plurality of first jet nozzles, and the plurality of first jet nozzles are preferably arranged at substantially equal angular intervals in the circumferential direction of the rotating shaft. According to this structure, a rotational force can be applied to the rotating mechanism in a balanced manner by the plurality of first jet nozzles, and thus the rotating mechanism can be stably rotated.
In the aforementioned fountain apparatus according to this aspect, the water jet nozzle preferably further includes a second jet nozzle configured to jet the water in a jetting direction having no propulsive force component in the circumferential direction of the rotating shaft. According to this structure, the water can be jetted in the different jetting direction from that of the first jet nozzle by the second jet nozzle, and thus the water can be jetted in more various directions, unlike the case in which the water is jetted only from the first jet nozzle. That is, the shape of the jetted water can be changed from a monotonous shape to a more complicated shape. Consequently, when the fountain apparatus is used for ornamental purposes, a preferable water shape can be obtained for ornamental purposes. In addition, the second jet nozzle is provided separately from the first jet nozzle that jet the water having the propulsive force component in the circumferential direction of the rotating shaft such that the water can be jetted in various directions while an excessive increase in a rotational force acting on the rotating mechanism is significantly reduced or prevented.
The aforementioned fountain apparatus according to this aspect preferably further includes a float that surrounds the water supply pipe. According to this structure, unlike the case in which the fountain apparatus is fixed to the bottom surface of a place in which water is stored, the fountain apparatus can be easily installed at a predetermined height position with respect to the water surface by the float. Moreover, the fountain apparatus can be easily installed in various places in which water is stored.
In this case, the submersible pump is preferably disposed on a rotation center axis of the rotating shaft. According to this structure, the position of the center of gravity of the submersible pump having a relatively heavy weight can be located directly below the float, and thus the submersible pump can be stably supported by the float. Consequently, tilting of the fountain apparatus floated by the float can be significantly reduced or prevented.
In the aforementioned fountain apparatus according to this aspect, the first jet nozzle is preferably inclined at an angle of less than 180 degrees with respect to a normal of a circle that extends in the circumferential direction of the rotating shaft in a plan view. According to this structure, even when the motor rotates in a direction opposite to that of the rotating shaft due to a reaction force generated by rotation of the pump rotating shaft 11a (impeller) of the submersible pump, a propulsive force can be applied by rotating the rotating mechanism in a direction to counteract the force generated by rotation of the motor. Thus, movement of the submersible pump (fountain apparatus) due to the force generated by rotation of the motor can be prevented, and the flying shape of the water jetted from the first jet nozzle can be unique with a stronger twist.
In the aforementioned fountain apparatus according to this aspect, a gap is preferably provided between the water supply pipe and the rotating mechanism, and the water is preferably jetted from the gap. According to this structure, it is not necessary to provide a seal member generally provided between the water supply pipe and the rotating mechanism, and thus the complicated apparatus structure can be further significantly reduced or prevented. Furthermore, there is no mechanical sliding, and thus stable rotation can be maintained as compared with the case in which a seal member or the like is provided. Moreover, the water can be jetted in the different jetting direction from that of the first jet nozzle, and thus unlike the case in which the water is jetted only from the first jet nozzle, the water can be jetted in more various directions. Consequently, when the fountain apparatus is used for ornamental purposes, a preferable water shape can be obtained for ornamental purposes.
In this case, the rotating mechanism preferably further includes a pipe including a tip at which the water jet nozzle is provided, and a rotating member connected to the pipe and configured to rotate together with the rotating shaft, the water supply pipe preferably includes an annular side wall including an opening on an upper side, and the side wall is preferably disposed below the rotating member such that the opening is substantially covered by the rotating member, and preferably includes an upper end spaced apart from the rotating member by the gap that is annular. According to this structure, the water jetted from the annular gap can be jetted annularly and substantially evenly in the circumferential direction of the rotating shaft.
In the aforementioned fountain apparatus according to this aspect, the first jet nozzle is preferably configured to jet the water in a jetting direction having an upward component. According to this structure, interference of the water jetted from between the water supply pipe and the rotating mechanism with the first jet nozzle can be prevented. Moreover, the water can be jetted upward from the first jet nozzle, and thus the jetted water can be more easily visually recognized and can reach a wider range.
In the aforementioned structure in which the gap from which the water is jetted is provided between the water supply pipe and the rotating mechanism, the side wall preferably includes a funnel-shaped water guide jet that surrounds a periphery of the rotating member, the funnel-shaped water guide jet being configured to guide water that has passed through the gap obliquely upward and jet the water. According to this structure, the funnel-shaped water guide jet can adjust the flow direction of the water that passes therethrough, and thus the jetting direction of the water to be jetted can be adjusted.
In this case, the rotating member preferably includes an inclined surface that faces an inner surface of the funnel-shaped water guide jet, and a water guide channel configured to guide the water that has passed through the gap is formed between the inner surface of the funnel-shaped water guide jet and the inclined surface. According to this structure, the water guide channel can further adjust the flow direction of the water that passes therethrough, and thus the jetting direction of the water to be jetted can be further adjusted. Consequently, a unique water shape preferred for ornamental purposes can be obtained. That is, the shape of the water jetted through the water guide channel can be generally made into a dish shape (dish edge shape).
According to the present invention, as described above, an increase in the size of the apparatus can be significantly reduced or prevented, and the complicated apparatus structure can be significantly reduced or prevented.
An embodiment of the present invention is hereinafter described on the basis of the drawings.
(Structure of Fountain Apparatus)
The embodiment of the present invention is now described with reference to
The fountain apparatus 100 includes a submersible pump 1, a water supply pipe 2, a float 3, a support mechanism 4, and a rotating mechanism 5.
The fountain apparatus 100 is configured to send water in the water storage area H pumped by the submersible pump 1 to the rotating mechanism 5 through the water supply pipe 2 and to jet the water from the rotating mechanism 5. The rotating mechanism 5 is rotatably supported by the support mechanism 4 and is configured to jet water while rotating.
As shown in
<Structure of Submersible Pump>
As shown in
The submersible pump 1 is disposed on the rotation center axis a of the rotating shaft 51 (described below) of the rotating mechanism 5. The pump rotating shaft 11a of the submersible pump 1 extends in a direction substantially parallel to the rotation center axis a of the rotating shaft 51.
<Structure of Water Supply Pipe>
As shown in
Specifically, the water supply pipe 2 includes a first pipe 21, a second pipe 22 disposed on the downstream side of the first pipe 21, and a side wall 23. The first pipe 21 extends upward (in a Z1 direction) along the outer shape of the submersible pump 1 from the lower end (one end 2a) connected to the discharge port 13b, and has an L-shape that curves inward toward directly above the submersible pump 1 on the upper side of the submersible pump 1. The second pipe 22 is disposed directly above the submersible pump 1 and has a linear shape that extends in the Z direction. The center axis of the second pipe 22 is disposed on the rotation center axis a of the rotating shaft 51.
A mooring 24 is provided in the vicinity of the lower end of the second pipe 22. A mooring rope 24a is tied to the mooring 24. Thus, drifting of the fountain apparatus 100 including the submersible pump 1 can be significantly reduced or prevented.
In the vicinity of the upper end of the second pipe 22, a step 22a in which the horizontal width of the pipe increases upward is provided. The horizontal size of a lower portion of the step 22a of the second pipe 22 is smaller than that of a through-hole 3a (described below) of the float 3, and the horizontal side of an upper portion of the step 22a of the second pipe 22 is larger than that of the through-hole 3a (described below) of the float 3. The step 22a is configured to come into contact with the float 3 through which the second pipe 22 is inserted from above to restrict upward movement of the float 3 with respect to the second pipe 22. Thus, the step 22a locates the height position of the water supply pipe 2 with respect to the float 3 (water surface).
The side wall 23 is provided at the upper end of the second pipe 22. The side wall 23 is annular (cylindrical) so as to have an opening 230 on the upper side. The side wall 23 is disposed below a rotating member 52 (described below) of the rotating mechanism 5 such that the opening 230 is substantially covered by the rotating member 52. The side wall 23 is disposed in such a manner that the upper end (the other end 2b) is spaced apart from the rotating member 52 by an annular gap S.
<Structure of Float>
As shown in
The float 3 is provided below (directly below) the rotating mechanism 5. That is, the float 3 allows the rotating mechanism 5, which jets water, to be located above the water surface.
<Structure of Support Mechanism>
As shown in
The support mechanism 4 includes holders (ribs) 41 and a support mechanism main body 42.
The holders 41 hold the support mechanism main body 42 in a state in which the support mechanism main body 42 is disposed at the center inside the annular side wall 23. A plurality of holders 41 are aligned in the circumferential direction of the rotating shaft 51. Each of the plurality of holders 41 extends radially in the radial direction of the rotating shaft 51 of the rotating mechanism 5. The outer ends of the holders 41 are connected to the side wall 23 of the water supply pipe 2. The inner ends of the holders 41 are connected to the support mechanism main body 42, and hold the support mechanism main body 42. The thicknesses of the holders 41 in the circumferential direction of the rotating shaft 51 of the rotating mechanism 5 are thinner such that the flow of water inside the side wall 23 is less likely to be obstructed.
The support mechanism main body 42 rotatably supports the rotating shaft 51 of the rotating mechanism 5. Specifically, the support mechanism main body 42 includes a pair of fixed-side bearings 42a configured to support the rotating shaft 51 and spaced apart from each other in the Z direction, and a cylindrical spacer 42b disposed between the pair of fixed-side bearings 42a.
<Structure of Rotating Mechanism>
As shown in
The rotating shaft 51 includes a pair of rotating-side bearings 51a configured to sandwich the pair of fixed-side bearings 42a from above and below. The rotating-side bearings 51a rotate together with the rotating shaft 51, and slide while contacting the horizontal surfaces of the fixed-side bearings 42a and supporting a (thrust) load generated in an upward-downward direction around the rotating shaft 51. The sliding surfaces of the fixed-side bearings 42a and the rotating-side bearings 51a are lubricated by water.
The rotating shaft 51 generally has a cylindrical shape that extends in the Z direction. The rotation center axis a of the rotating shaft 51 substantially coincides with the center position of the second pipe 22 of the water supply pipe 2 that extends in the Z direction. In addition, the rotation center axis a of the rotating shaft 51 is generally located between the center axis 13 of a portion of the first pipe 21 that extends in the upward-downward direction and the rotation center axis y of the pump rotating shaft 11a of the submersible pump 1 in a horizontal direction.
The rotating member 52 has a disk shape that is circular in a plan view (as viewed in the Z direction). The rotating member 52 includes a through-hole 52a and a plurality of (four) through-holes 52b.
The through-hole 52a passes through the rotating member 52 in the Z direction. The through-hole 52a is disposed at the center position of the rotating member 52. The rotating shaft 51 is inserted through the through-hole 52a such that the rotating member 52 is fixed, and the rotating member 52 is attached to the rotating shaft 51 so as to rotate together with the rotating shaft 51. Furthermore, the pipes 55a and the pipes 55b are connected to the rotating member 52, and the rotating member 52 rotates together with the rotating shaft 51.
Each of the plurality of (four) through-holes 52b passes through the rotating member 52 in the Z direction. The plurality of through-holes 52b are arranged at substantially equal angular intervals (90 degrees) in the circumferential direction of the rotating shaft 51.
The pipes 55a are fixed to some (two) of the plurality of (four) through-holes 52b. Furthermore, the pipes 55b are fixed to the others (two) of the plurality of (four) through-holes 52b. The upstream ends (ends on the rotating member 52 side) of the pipes 55a and the pipes 55b are connected to an internal space of the water supply pipe 2 such that water can be received from the water supply pipe 2. Both the pipes 55a and the pipes 55b extend in the radial direction of the rotating shaft 51 in the plan view (see
As described above, the plurality of (two) pipes 55a are provided, and a plurality of (two) first jet nozzles 53 are provided. The pipes 55a (the plurality of first jet nozzles 53 respectively provided at the tips of the plurality of pipes 55a) are arranged at substantially equal angular intervals (180 degrees) in the circumferential direction of the rotating shaft 51.
As described above, the plurality of (two) pipes 55b are provided, and a plurality of (two) second jet nozzles 54 are provided. The plurality of pipes 55b (the plurality of second jet nozzles 54 respectively provided at the tips of the plurality of pipes 55b) are arranged at substantially equal angular intervals (180 degrees) in the circumferential direction of the rotating shaft 51. Furthermore, the plurality of pipes 55b are provided at substantially intermediate angular positions between the pipes 55a in the circumferential direction of the rotating shaft 51.
The first jet nozzles 53 are configured to jet water supplied from the submersible pump 1 through the water supply pipe 2. The first jet nozzles 53 are configured to jet the water in the jetting direction having the propulsive force component in the circumferential direction (tangential direction) of a rotating shaft 51. In
If the first jet nozzles 53 jet water along the normal L2 in the plan view, the jetted water does not have the propulsive force component in the circumferential direction (tangential direction) of the rotating shaft 51, and thus the rotating mechanism 5 does not rotate. Therefore, the first jet nozzles 53 are configured to jet water in a direction inclined by an acute angle A1 with respect to the normal L2 in the plan view. The first jet nozzles 53 jet water toward the inner side of the circular broken line L1.
As shown in
As shown in
As shown in
As shown in
The side wall 23 includes a water guide jet 23a on its outer peripheral side. The water guide jet 23a surrounds the periphery of the rotating member 52, and is configured to guide water that has passed through the gap S obliquely upward and jet the same. The water guide jet 23a has a funnel shape that widens upward. That is, the fountain apparatus 100 is configured to jet water from the gap S via the water guide jet 23a in addition to the first jet nozzles 53 and the second jet nozzles 54.
The rotating member 52 includes an inclined surface 52c that faces the inner surface 23b of the water guide jet 23a. Between the inner surface 23b of the funnel-shaped water guide jet 23a and the inclined surface 52c, a water guide channel D that guides the water that has passed through the gap S is formed. In a direction in which the water guide channel D extends (a direction from the upstream side toward the downstream side), the width (an interval between the inner surface 23b and the inclined surface 52c) of the water guide channel D is substantially constant. The fountain apparatus 100 is configured to jet the water that has passed through the annular gap S in an annular shape and a dish shape (dish edge shape) via the funnel-shaped water guide jet 23a and the water guide channel D.
According to this embodiment, the following advantageous effects are achieved.
According to this embodiment, as described above, the first jet nozzles 53 jets the water in the jetting direction having the propulsive force component in the circumferential direction of the rotating shaft 51 such that a rotational force can be applied to the rotating mechanism 5. That is, water can be jetted while the rotating mechanism 5 is rotated without providing a dedicated drive mechanism for rotating the rotating mechanism 5 in addition to the submersible pump 1 that supplies water to the rotating mechanism 5 in the fountain apparatus 100. Therefore, it is not necessary to provide a motor and a plurality of gears as a drive that rotates the rotating mechanism 5 as in the prior art, and thus an increase in the number of components can be significantly reduced or prevented. Consequently, an increase in the size of the apparatus can be significantly reduced or prevented, and the complicated apparatus structure can be significantly reduced or prevented.
According to this embodiment, as described above, the plurality of first jet nozzles 53 are provided, and the plurality of first jet nozzles 53 are arranged at the substantially equal angular intervals in the circumferential direction of the rotating shaft 51. Accordingly, a rotational force can be applied to the rotating mechanism 5 in a balanced manner by the plurality of first jet nozzles 53, and thus the rotating mechanism 5 can be stably rotated.
According to this embodiment, as described above, the second jet nozzles 54 are further provided to jet water in the jetting direction having no propulsive force component in the circumferential direction of the rotating shaft 51. Accordingly, water can be jetted in the different jetting direction from that of the first jet nozzles 53 by the second jet nozzles 54, and thus water can be jetted in more various directions, unlike the case in which water is jetted only from the first jet nozzles 53. That is, the shape of the jetted water can be changed from a monotonous shape to a more complicated shape. Consequently, when the fountain apparatus 100 is used for ornamental purposes, a preferable water shape can be obtained for ornamental purposes. In addition, the second jet nozzles 54 are provided separately from the first jet nozzles 53 that jet the water having the propulsive force component in the circumferential direction of the rotating shaft 51 such that water can be jetted in various directions while an excessive increase in a rotational force acting on the rotating mechanism 5 is significantly reduced or prevented.
According to this embodiment, as described above, the float 3 that surrounds the water supply pipe 2 is further provided. Accordingly, unlike the case in which the fountain apparatus 100 is fixed to the bottom surface of a place in which water is stored, the fountain apparatus 100 can be easily installed at a predetermined height position with respect to the water surface by the float 3. Moreover, the fountain apparatus 100 can be easily installed in various places in which water is stored.
According to this embodiment, as described above, the submersible pump 1 is disposed on the rotation center axis a of the rotating shaft 51. Accordingly, the position of the center of gravity of the submersible pump 1 having a relatively heavy weight can be located directly below the float 3, and thus the submersible pump 1 can be stably supported by the float 3. Consequently, tilting of the fountain apparatus 100 floated by the float 3 can be significantly reduced or prevented.
According to this embodiment, as described above, the first jet nozzles 53 are inclined at an angle of less than 180 degrees with respect to the normal of the circle that extends in the circumferential direction of the rotating shaft 51 in the plan view. According to this structure, even when the motor 11 rotates in a direction opposite to that of the rotating shaft 51 due to a reaction force generated by rotation of the pump rotating shaft 11a (impeller 12), a propulsive force can be applied by rotating the rotating mechanism 5 in a direction to counteract the force generated by rotation of the motor 11. Thus, movement of the submersible pump 1 (fountain apparatus 100) due to the force generated by rotation of the motor 11 can be prevented, and the flying shape of the water jetted from the first jet nozzles 53 can be unique with a stronger twist.
According to this embodiment, as described above, the gap S is provided between the water supply pipe 2 and the rotating mechanism 5, and water is jetted from the gap S. Accordingly, it is not necessary to provide a seal member generally provided between the water supply pipe 2 and the rotating mechanism 5, and thus the complicated apparatus structure can be further significantly reduced or prevented. Furthermore, there is no mechanical sliding, and thus stable rotation can be maintained as compared with the case in which a seal member or the like is provided. Moreover, water can be jetted in the different jetting direction from that of the first jet nozzles 53, and thus unlike the case in which water is jetted only from the first jet nozzles 53, water can be jetted in more various directions. Consequently, when the fountain apparatus 100 is used for ornamental purposes, a preferable water shape can be obtained for ornamental purposes.
According to this embodiment, as described above, the rotating mechanism 5 further includes the pipes 55a and 55b including the tips at which the water jet nozzles 50 are provided, and the rotating member 52 connected to the pipes 55a and 55b and configured to rotate together with the rotating shaft 51. Furthermore, the water supply pipe 2 includes the annular side wall 23 including the opening 230 on the upper side, and the side wall 23 is disposed below the rotating member 52 such that the opening 230 is substantially covered by the rotating member 52, and includes the upper end spaced apart from the rotating member 52 by the annular gap S. Accordingly, the water jetted from the annular gap S can be jetted annularly and substantially evenly in the circumferential direction of the rotating shaft 51.
According to this embodiment, as described above, the first jet nozzles 53 are configured to jet water in the jetting direction having the upward component. Accordingly, interference of the water jetted from between the water supply pipe 2 and the rotating mechanism 5 with the first jet nozzles 53 can be prevented. Moreover, water can be jetted upward from the first jet nozzles 53, and thus the jetted water can be more easily visually recognized and can reach a wider range.
According to this embodiment, as described above, the side wall 23 includes the funnel-shaped water guide jet 23a that surrounds the periphery of the rotating member 52 and that guides the water that has passed through the gap S obliquely upward and jets the same. Accordingly, the funnel-shaped water guide jet 23a can adjust the flow direction of the water that passes therethrough, and thus the jetting direction of the water to be jetted can be adjusted.
According to this embodiment, as described above, the rotating member 52 includes the inclined surface 52c that faces the inner surface 23b of the funnel-shaped water guide jet 23a, and the water guide channel D that guides the water that has passed through the gap S is formed between the inner surface 23b of the funnel-shaped water guide jet 23a and the inclined surface 52c. Accordingly, the water guide channel D can further adjust the flow direction of the water that passes therethrough, and thus the jetting direction of the water to be jetted can be further adjusted. Consequently, the shape of the water jetted through the water guide channel D can be generally made into a dish shape (dish edge shape).
The embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is not shown by the above description of the embodiment but by the scope of claims for patent, and all modifications (modified examples) within the meaning and scope equivalent to the scope of claims for patent are further included.
For example, while the example in which the fountain apparatus includes the float has been shown in the aforementioned embodiment, the present invention is not restricted to this. In the present invention, instead of providing the float in the fountain apparatus, the fountain apparatus may be fixed to the bottom surface of the water storage area, for example.
While the example in which the fountain apparatus includes both the first jet nozzles and the second jet nozzles has been shown in the aforementioned embodiment, the present invention is not restricted to this. In the present invention, the fountain apparatus may include only the first jet nozzles and may not include the second jet nozzles.
While the example in which water is jetted outward in the radial direction of the rotating shaft from the second jet nozzles has been shown in the aforementioned embodiment, the present invention is not restricted to this. In the present invention, for example, water may be jetted inward in the radial direction of the rotating shaft from the second jet nozzles.
The jetting direction of the first jet nozzles according to the present invention is not limited to the water jetting direction of the first jet nozzles shown in the embodiment described above, but water may be jetted in any direction from the first jet nozzles as long as the jetting direction of the first jet nozzles according to the present invention has the propulsive force component in the circumferential direction of the rotating shaft.
While the example in which the two first jet nozzles are provided has been shown in the aforementioned embodiment, the present invention is not restricted to this. In the present invention, one or three or more first jet nozzles may be provided.
While the example in which the two second jet nozzles are provided has been shown in the aforementioned embodiment, the present invention is not restricted to this. In the present invention, one or three or more second jet nozzles may be provided.
While the example in which the fountain apparatus includes equal numbers of first jet nozzles and second jet nozzles has been shown in the aforementioned embodiment, the present invention is not restricted to this. In the present invention, for example, the fountain apparatus may include different numbers of first jet nozzles and second jet nozzles, such as four first jet nozzles and two second jet nozzles.
While the example in which the submersible pump is disposed on the rotation center axis of the rotating shaft of the rotating mechanism has been shown in the aforementioned embodiment, the present invention is not restricted to this. In the present invention, the submersible pump may be disposed at a position deviated from the rotation center axis of the rotating shaft.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-090842 | May 2018 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2019/016041 | 4/12/2019 | WO | 00 |
