JP3422786B2 - Fluid ejection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid ejecting apparatus having a chamber for receiving a fluid and ejecting the received fluid from a fluid ejection port.

[0002]

2. Description of the Related Art As one example of this type of fluid ejection device, a local cleaning device for cleaning a local part (anus, etc.) of a human body is well known. In such a local cleaning device, when the cleaning water is ejected from one fluid ejection port toward the human body local part, it is usually desired that the range where the ejected cleaning water is landed is wide to some extent.

To meet these demands, a method of rotating a nozzle arm incorporating a nozzle in an arc locus (nozzle arm rotating method) and a method of driving the nozzle itself in the nozzle arm incorporating this (nozzle rotating method) ) Should be taken. By the way, in the former method, since it is necessary to simultaneously control the nozzle arm by two axes on orthogonal coordinates, a drive motor or the like is required for each axis, resulting in an increase in size of the apparatus. On the other hand, the latter method is preferable because only the nozzle is driven, so that the apparatus can be downsized accordingly. Such nozzle rotating technique, for example Japanese Patent are also various of at 2000-8453 JP's is proposed, it is broadly divided into those for driving the nozzle and drives the nozzles in electrical power in cleaning water pressure It The latter is superior to the former in terms of energy saving.

FIG. 1 is an explanatory view for explaining a constitution conventionally adopted so as to rotate and drive a nozzle by washing water pressure.
FIG. 1A shows a schematic cross section of the nozzle arm.
(B) is explanatory drawing which shows the floor cross section of the AA line.

As shown in FIG. 1, a truncated cone-shaped nozzle is rotatably installed in a chamber in a nozzle arm.
A plurality of curved grooves are formed on the peripheral wall of the nozzle around the peripheral wall. This nozzle is sealed with the inner surface of the chamber by a sealing material at its tip side. When washing water is supplied to such a nozzle, when the washing water passes through the inner surface of the chamber and the groove on the peripheral wall of the nozzle, the nozzle is rotated by the pressure of the washing water. Therefore, the nozzle ejects washing water from the ejection port at the tip of the nozzle so that the water landing range is expanded.

[0006]

However, in the above-mentioned conventional structure, since the sealing material is interposed between the tip of the nozzle and the inner surface of the chamber, the nozzle receives a relatively large rotational resistance from the sealing material during its rotation. .

The rotation speed of the nozzle influences the spread of the washing water from the jet outlet, and a certain rotation speed is required to widen and narrow the water landing range. As a result, in order to develop the rotation of the nozzle and maintain it, it is necessary to increase the water pressure at the time of supplying the wash water, which causes a problem that the drive unit such as a pump becomes large and a problem that the operating cost becomes high. there were.

These problems are not peculiar to the washing water jetting device represented by the local washing device, and even in the case of the fluid jetting device used for other purposes, the nozzle rotation is caused by the fluid pressure. Problem is occurring.

The present invention has been made to solve the above-mentioned problems, and adopts a structure in which the nozzle rotation is caused by fluid pressure, and further downsizes a drive unit such as a fluid supply pump to a chamber and reduces operating cost. The purpose is to

[0010]

In order to solve at least a part of the above problems, a fluid ejection device of the present invention includes a chamber for receiving a fluid, and ejects the received fluid from a fluid ejection port. Which is a nozzle incorporated in the chamber, has the fluid outlet on the nozzle tip side, and has a nozzle internal conduit for guiding the fluid received in the chamber to the fluid outlet The nozzle is provided with a reduced diameter portion on the nozzle tip side formed in the nozzle in an opening formed in the chamber so that the nozzle can be rotated and the position of the nozzle can be changed in the axial direction of the nozzle. figure causes enter, the previous SL nozzle is inclined relative to the central axis of the opening
When the fluid is supplied to the chamber, the nozzle is repositioned toward the outer side of the nozzle tip by fluid pressure, and the fluid is larger than the reduced diameter portion. The end surface of the nozzle portion of the diameter abuts the chamber ceiling wall on the opening side, and in the abutting state, the nozzle is fluidized.
While rotating around the axis by pressure, the center
Configured in an inclined position with respect to the axis to eject fluid from the revolving around the central axis length <br/> et the fluid ejection opening Citea
The fluid pressure causes the nozzle to move outward from the nozzle tip.
In the situation where the position is changed toward the side,
The opening means a space around the opening in the chamber.
Fluid passing from the inside to the outside of the opening and from the fluid outlet
It is characterized in that it does not cause interference with the jet fluid of .

In the fluid ejecting apparatus of the present invention having the above structure, when the fluid is supplied to the chamber, the position of the nozzle is changed by the fluid pressure toward the outer side of the nozzle tip,
The end surface of the nozzle portion having a diameter larger than the diameter-reduced portion on the nozzle tip side contacts the chamber ceiling wall on the opening side.

[0012] nozzles take this contact state, while rotating about the nozzle axis by the fluid pressure, also, the opening
Revolve around the center axis in a posture inclined with respect to the center axis
And while, to leave injection fluid from the fluid ejection opening.

As a result , the fluid ejection from the ejection port is
A conical shape centered on the center axis of the opening of the chamber.
Therefore, the fluid can be ejected over a wide range. Further, by the above contact, it is possible to seal between the chamber ceiling wall and the end surface of the nozzle portion having a diameter larger than that of the reduced diameter portion.

Such a sealing condition is caused by the large diameter nozzle portion.
It is caused by the contact of the end face with the chamber ceiling wall,
Is slightly inclined with respect to the center axis of the opening,
Because the fluid between the switch Yanba ceiling wall and the nozzle portion end surface of what there is there is room for entering serves the ingress fluid lubricant. For this reason, the resistance that the end face of the nozzle portion receives from the chamber ceiling wall can be made small, so that good nozzle rotation can be achieved even if the fluid pressure in the chamber is small. That is, since the fluid pressure of the fluid supplied to the chamber can be low, it is possible to reduce the size of the drive unit such as a pump for fluid supply and reduce the operating cost. By the way, the above infiltration fluid is
-Pass from the inside to the outside of the opening. However, the present invention
The fluid pressure causes the nozzle to face outward from the nozzle tip.
In the situation where the position was once changed,
Between the inside of the chamber and the outside of the opening
Interference between the passing fluid and the fluid ejected from the fluid ejection outlet
Since it is not rubbed, it is jetted from the fluid jet
Without causing turbulence in the fluid,
Stabilization can be achieved.

There are also the following advantages. In the nozzle arm rotation method in which the nozzle is fixed and the nozzle arm is rotated in an arc locus, the movement of the fluid ejection port is slow because the drive target is large. Even with the conventional nozzle rotation method shown in FIG. 1, when the fluid pressure of the supplied fluid is low, the nozzle rotation, and consequently the fluid ejection port rotation speed, becomes slow. Therefore, in such a case, there is a problem that the degree of spread of the fluid ejected from the rotating fluid ejection port becomes small. However, in the fluid ejection device of the present invention, even if the fluid pressure of the supply fluid is low, the rotation of the nozzle / fluid ejection port can be maintained at a high rotation speed without greatly decreasing, and therefore the above-mentioned problem does not occur.

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

In the above-mentioned another fluid ejection device of the present invention,
A guide for guiding the nozzle body may be provided in the chamber so that the nozzle revolves around the central axis in a posture inclined with respect to the central axis of the opening. With this, the guide of the nozzle stabilizes the inclined posture of the nozzle when the nozzle revolves around the central axis of the opening. Further, by adjusting the guides in various ways, it becomes easy to set the nozzle tilt posture to a desired posture.
As a result, the fluid can be ejected in a stable conical shape around the center axis of the opening of the chamber, and the ejected fluid can be ejected accurately in a desired range of the ejection target.

Further, in any one of the above fluid ejecting apparatuses of the present invention, at least one of the chamber ceiling wall and the end surface of the nozzle portion having a diameter larger than the reduced diameter portion can be formed into a spherical surface. This makes it possible to further reduce the rotational resistance received by the rotating and revolving nozzle from the chamber ceiling wall. Therefore, the rotation efficiency of the nozzle is increased and it is possible to cope with a low fluid pressure, so that it is possible to further reduce the size of the drive unit and reduce the operating cost.

In order to solve at least a part of the above-mentioned problems, another fluid ejecting apparatus of the present invention is an apparatus for ejecting a fluid from a fluid ejecting port, the chamber receiving the supply of the fluid, and the chamber. The nozzle having the fluid ejection port on the nozzle tip side, the nozzle having a nozzle internal conduit for guiding the fluid received in the chamber to the fluid ejection port, wherein the nozzle comprises:
The fluid ejection port is exposed to the outside of a ceiling opening formed in the chamber, and the ceiling opening is brought into contact with one location of the chamber ceiling wall and with at least one other location. When the fluid is supplied to the chamber so as to be revolvable around the central axis in the inclined posture and the fluid is supplied to the chamber, the inclined posture is caused by the fluid pressure of the supply fluid. while revolving around the central axis in a state of taking the co and you ejecting fluid from the fluid ejection opening through said nozzle conduit
In addition, the tilted posture causes
A gap is formed in one place other than the chamber ceiling wall.
It is characterized in that the passage of the fluid inside the chamber occurs .

In another fluid ejecting apparatus of the present invention having the above structure, when the fluid is supplied to the chamber, the nozzle is
While revolving around the central axis in a tilted posture inclined to the central axis of the ceiling opening by the fluid pressure of the supplied fluid,
A fluid is ejected from the fluid ejection port. Therefore, the fluid ejected from the fluid ejection port of the nozzle has a conical shape centered on the center axis of the opening of the chamber, and the fluid can be ejected in a wide range.

Such a tilted posture of the nozzle is brought about by the abutment of the nozzle on the chamber ceiling wall and the abutment on another location, and both abutments are so-called point contacts. Therefore, at a certain moment during the revolution of the nozzle, at the ceiling opening of the chamber, the nozzle is in contact with the ceiling wall of the chamber (point contact) on the side where the nozzle is inclined, but around the ceiling opening. Then, there is a gap other than this contact point. The degree of this gap is determined by the degree of inclination of the nozzle.

At such gaps around the ceiling opening, the passage of the fluid in the chamber occurs, and the position of this gap changes around the ceiling opening as the nozzle revolves in the inclined posture. Therefore, the fluid passing through the gap functions as a lubricant throughout the revolution of the nozzle. For this reason, the resistance that the nozzle receives from the ceiling wall of the chamber can be reduced, so that good nozzle rotation can be achieved even if the fluid pressure in the chamber is low. Therefore, as described above, it is possible to reduce the size of a drive unit such as a pump for supplying fluid and reduce the operating cost. Moreover, when the nozzle revolves, point contact occurs, and the point contact location changes depending on the nozzle revolution. As a result, the resistance itself associated with the contact is also reduced, so that it is possible to further reduce the size of the drive unit and reduce the operating cost. In addition, since it is point contact, the frictional force associated with this contact can be reduced, which is preferable from the viewpoint of wear prevention.

Further, even if the fluid pressure of the supplied fluid is low, the rotation of the nozzle / fluid outlet can be maintained at a high speed, so that the above problem of narrowing the extent of the ejected fluid does not occur.

Further, since the inclined posture of the nozzle is due to the contact with the chamber ceiling wall and the contact with another place, the inclined posture is stable under the condition where this contact is achieved. When the fluid supply to the chamber has a high fluid pressure, the nozzle tends to incline to a greater extent, but the abutting posture at that time is maintained by the above contact. Therefore, the fluid can be ejected in a stable conical shape around the center axis of the ceiling opening of the chamber, and the ejected fluid can be ejected accurately in a desired range of the ejection target. It should be noted that the nozzle inclining posture can be set to a desired posture by variously adjusting the abutting portion to the other one portion described above.

When the nozzle revolves in the chamber as described above, the rotation resistance is reduced by the fluid passing through the gap as described above at the contact portion of the chamber ceiling wall. But,
The rotation resistance acts on the nozzle as frictional resistance because the nozzle is free in the chamber.
Therefore, when the nozzle revolves, the friction resistance causes the nozzle to rotate around its own center axis, that is, to rotate on its axis. When the nozzle rotates in this manner, the contact portion of the nozzle with respect to the chamber ceiling wall changes around the rotation axis due to the rotation of the nozzle, which does not cause a situation where a certain portion remains in contact with the chamber ceiling wall. Therefore, the wear of the nozzle can be surely suppressed.

The above-mentioned another fluid ejection device of the present invention can take various forms. For example, another contact that causes the inclined posture of the nozzle is caused by contact with the chamber side wall around the nozzle, and occurs at two positions, that is, the chamber side wall contact position and the chamber ceiling wall contact position. It is also possible to adopt the inclined posture.

In this case, since the contact portion of the nozzle is separated from the chamber ceiling wall and the chamber side wall, the stabilization of the tilted posture can be enhanced. Further, since the abutting portions are separated from each other in this manner, even if the ceiling opening of the chamber has a small diameter, it does not affect the expression and reproducibility of the tilted posture of the nozzle.
Moreover, if the ceiling opening is made to have a small diameter, the gap portion around the ceiling opening also becomes small, so that the passing fluid amount can be reduced while maintaining the lubricating function of the fluid passing through the gap portion.

In this case, the following can also be done. That is, the nozzle has a nozzle tip having a diameter smaller than the ceiling opening and a nozzle body having a diameter larger than the ceiling opening and continuing to the nozzle tip, and the nozzle tip is projected outside from the ceiling opening. The fluid ejection port is exposed to the outside of the ceiling opening, the step portion of the nozzle tip and the nozzle main body is brought into contact with the chamber ceiling wall, and the nozzle main body is brought into contact with the chamber side wall to achieve the inclined posture. take.

In this way, the fluid ejection port that causes the above-mentioned conical fluid ejection is located outside the ceiling opening, and the nozzle tip is located in this ceiling opening. Therefore, the fluid passing through the gap around the ceiling opening does not interfere with the fluid ejected from the fluid ejection port. Therefore, turbulence does not occur in the conical ejection fluid, so that fluid ejection from the fluid ejection port can be stabilized.

The following is also possible. That is, the nozzle has a nozzle tip having a diameter smaller than the ceiling opening and a nozzle body having a diameter larger than the ceiling opening and continuing to the nozzle tip, and the nozzle tip is projected outside from the ceiling opening. The fluid ejection port is exposed to the outside of the ceiling opening, and the abutment of the other location abuts against the opening wall of the ceiling opening, and the abutment location of the ceiling opening wall and the chamber ceiling wall surface contact. The inclined posture is adopted at two contact points, the nozzle tip is brought into contact with the ceiling opening wall, and the step portion between the nozzle tip and the nozzle body is brought into contact with the chamber ceiling wall.

In this way, by arranging the fluid ejection port outside the ceiling opening, the above-mentioned effects can be achieved, and there are also the following advantages. The inclined posture of the nozzle occurs due to the contact with the ceiling opening wall and the contact with the chamber ceiling wall surface, and these contact points are located across the ceiling opening. Therefore, by adjusting the diameter of the ceiling opening, it is possible to adjust the nozzle inclination posture by separating or bringing the two contact points apart from each other. Since the ceiling opening can be easily post-processed from the outside of the chamber, it is easy to adjust the nozzle inclination posture.

Even in this case, since the ceiling opening of the chamber can be made small in diameter, the gap area around the ceiling opening becomes small. Therefore, the amount of fluid passing through the gap can be reduced while ensuring the lubrication function.

Further, since the ceiling opening wall is brought into contact with the tip of the nozzle having a small diameter, the peripheral speed of the nozzle rotation can be reduced by the smaller diameter of the abutting portion. Therefore, even if the same portion abuts due to the incomplete rotation of the nozzle, the peripheral speed is low, so that the abrasion of the abutting portion can be suppressed. In this case, the contact point wear can be further suppressed by the lubricating action of the fluid passing through the gap around the ceiling opening.

Further, in this case, the following is also possible. That is, in addition to the contact with the ceiling opening wall and the chamber ceiling wall, the nozzle takes the inclined posture by bringing the nozzle body into contact with the chamber side wall.

In this way, the inclined posture of the nozzle is based on the contact at three points, so that the inclined posture can be secured more stably. Moreover, since the number of contact points when adopting the tilted posture increases, even if the fluid supply to the chamber is at a high fluid pressure, the nozzle tilted posture can be maintained more reliably and the fluid in a stable conical shape can be maintained. Ejection and accurate fluid ejection to a desired range can be achieved.

Further, the nozzle is moved to the ceiling opening side by receiving the fluid pressure accompanying the fluid supply to the chamber,
The contact with the ceiling wall of the chamber may occur. In this way, the nozzle can be almost completely free in the chamber at the beginning of the fluid supply before the contact with the chamber ceiling wall. Therefore, the operability of the fluid pressure associated with the subsequent fluid supply is enhanced, and the nozzle can be inclined and the above-described revolution of the nozzle can easily occur. Therefore, it is possible to enhance the starting property of the revolution in the inclined posture.

Further, the chamber ceiling wall may be formed so that the contact portion with the nozzle is bulged in an annular shape. In this case, since the nozzle abutment occurs only in the annular bulge, the point contact accompanying the abutment occurs. It is useful for stabilization of the above and prevention of wear as described above. As long as the worn portion stops at the annular ridge, the state of point contact is still stable due to the annular ridge in the shape after the abrasion.

Further, in the nozzle, the contact portion with the chamber ceiling wall may have a spherical shape or a tapered shape. This way
It is more useful for stabilizing the point contact associated with the contact and preventing the above-mentioned wear. In particular, when the nozzle is tilted, the gap portion around the ceiling opening can be narrowed, so that the cleaning water passing through the gap portion can be reduced. Therefore, the wash water can be effectively used for jetting from the wash water jet.

Further, if the nozzle inner pipe line penetrates in the axial direction of the nozzle, the weight of the nozzle can be reduced by the amount of the penetrating nozzle inner pipe line. Therefore, the inertia exhibited by the nozzle itself becomes small, and it is possible to easily cause an inclined posture and revolve the nozzle due to the fluid pressure, and it is possible to improve the startability and the rotation speed.

In this case, the nozzle inner pipe can have a large-diameter pipe on the side opposite to the fluid ejection port, and this makes the nozzle lighter, which is useful for improving startability and rotation speed. Moreover, when the fluid passes through the nozzle inner duct toward the fluid ejection port, the narrow transition of the duct occurs, so that the rectifying action of the fluid ejection washing water can be achieved.

Further, at least one of the chamber ceiling wall and the contact portion of the nozzle with the chamber ceiling wall may be made of a material having wear resistance, for example, a metal material. In this way, it is possible to suppress the wear due to the nozzle contact (point contact), and it is possible to enhance the heat dissipation efficiency of the wear heat generated at the time of contact. Therefore, it is possible to avoid melting and sticking due to frictional heat, and it is possible to improve the reliability of the revolution of the nozzle and the ejection of the fluid. If the nozzle is made of a metal material as described above, the weight of the nozzle can be increased accordingly. Therefore, the inertia exhibited by the nozzle is increased, the centrifugal force associated with the revolution of the nozzle can be increased, and the tilted posture of the nozzle can be stabilized during revolution.

The fluid jetting device described above can be applied to various devices for discharging washing water to wash an object to be washed. For example, it can be used not only for a human body part cleaning device and a shower device, but also for a portable human body part cleaning device for carrying and cleaning a human body part. In the fluid ejection device described above, when the nozzle revolves in the inclined posture, not only the actuator but also a power source for driving the nozzle, a battery, or the like is not required. Therefore, the fluid ejection device of the present invention is suitable for a portable human body local cleaning device that is required to be lightweight, compact and low cost.

In the human body part cleaning device to which the fluid jetting device of the present invention is applied, the driving part can be miniaturized and the operating cost can be reduced as already described in the fluid jetting device incorporated in the nozzle arm. Even when the cleaning device is bet, the nozzle arm itself and the device itself can be downsized.

In particular, since it is possible to change the position of the jetted cleaning water that comes into contact with water at a high speed through the high speed rotation (revolution) of the nozzle, even if a portion such as a human body part that is sensitive to a stimulus is to be cleaned, It is possible to make it difficult to perceive the transition of the cleaning process and not to make the cleaning feel uncomfortable.

Even a shower device to which the fluid jetting device of the present invention is applied is suitable as a shower device because the drive unit provided by the fluid jetting device can be downsized and the operating cost can be reduced. Further, since it does not require a special device or power source as described above, it is also suitable as an environment where there is a lot of humidity and rust or electric leakage easily occurs, for example, as a shower device in a bathroom. Furthermore, due to the high speed transition of the landing portion of the jet cleaning water, there is no discomfort when taking a shower fountain.

Further, in a cleaning device to which the fluid jetting device of the present invention is applied, for example, a dishwashing device in which dishes are objects to be washed, the nozzle of the fluid jetting device is directed toward the item to be washed, and Sprinkle the conical jet cleaning water with the nozzle revolution. Such jetted cleaning water has a swirl component due to the revolution of the nozzle, and also has a swirl component due to this rotation when the nozzle itself causes rotation around the nozzle axis as described above. Therefore, according to the cleaning apparatus of the present invention, as compared with the case where the cleaning water simply goes straight and the cleaning water lands on the cleaning object, the ability to remove the dirt adhering to the object to be adhered is increased, and the cleaning capacity can be improved. it can. And such a wide range of cleaning water jets,
Water saving is also improved by improving the peeling and cleaning ability.

In such a washing device (dishwashing device), the above fluid ejecting device is attached to a rotatable arm which is disposed in a washing chamber and is rotatable. At the time of this mounting, the fluid jetting device is arranged at the end of the rotary arm with the rotary shaft being sandwiched, and the cleaning water is supplied to the chamber of each fluid jetting device. And, each of this fluid ejection device,
The reaction force generated by the jet of wash water is directed obliquely so that the rotary arm causes rotation in the same direction, and water is discharged from the fluid jet port of the nozzle.

In this way, by discharging water from the nozzle at the end of the rotary arm (water discharge by the nozzle revolution), the rotary arm rotates about the rotation axis and is substantially rotated by the nozzle revolution on the dishes in the washing chamber. You can even spray a cone of water. Therefore, the cleaning ability of tableware can be further improved. Moreover, since the rotating arm can be made smaller by downsizing the fluid ejection device itself, it is possible to increase the effective internal volume of the dishwashing device and improve dishwashing efficiency.

The fluid jetting device of the present invention can be applied not only to such a dishwashing device but also to a device for washing the surface of a bath. In such a bath cleaning device, the fluid ejection device of the present invention is provided on the surface of the bath, and the chemical liquid or the cleaning water is sprayed on the opposing bath surface. By doing so, it is possible to achieve the above-described widespreading of the jetted cleaning water and a high cleaning effect associated therewith. In addition, water can be saved as much as a wide range can be ejected.

[0056]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on Examples. FIG. 2 is a schematic perspective view showing the appearance of a toilet bowl 30 having a flush water ejection device 40 according to an embodiment of the present invention, and FIG. 3 is a schematic exploded perspective view for explaining the configuration of the flush water ejection device 40. Is a schematic vertical sectional view of the cleaning water jetting device 40, and FIG. 5 is a horizontal schematic sectional view of the cleaning water jetting device 40.

The cleaning water jetting device 40 is applied to a human body local cleaning device for cleaning a local part (anus or the like) of a human body after defecation or the like, and is incorporated in the nozzle arm 31. The nozzle arm 31 is movable back and forth with respect to the toilet bowl, advances to a cleaning position as shown in the drawing for local cleaning, and starts cleaning water jetting from the washing water jetting device 40. The cleaning water ejection device 40 includes a chamber 2 for receiving the cleaning water, and ejects the received cleaning water from the cleaning water ejection port 5. Hereinafter, the cleaning water jetting device 40 will be described in detail.

The washing water jetting device 40 is provided with a rectangular parallelepiped rectangular block 8, and a through hole vertically formed in the central portion of the rectangular block 8 serves as a chamber 2. The chamber 2 is closed by an upper lid 9 and a lower lid 10 with O-rings 22 interposed at the upper and lower ends thereof, and each lid is fixed to the corner block 8 by bolts.

As shown in FIGS. 3 and 4, the upper lid 9 is provided with a small-diameter upper through hole 6A at the center thereof and a large-diameter lower through hole 6B following the upper through hole 6A. Ceiling opening. The step portion B between the upper through hole 6A and the lower through hole 6B serves as a receiver for the nozzle 4 described later. The lower lid 10 is provided with a concave portion 41 functioning as a receiving portion for the nozzle 4 at the center of the convex portion.

As shown in FIG. 5, the square block 8 has a female screw hole 12 with a bottom at both ends in the longitudinal direction, and a communication hole 13 reaching the chamber 2 from the screw bottom. A washing water supply hose 50 is connected to the female screw hole 12, and washing water is supplied from this hose to the chamber 2 by a pump (not shown). In this case, the female screw hole 12 is formed to be offset in the horizontal direction with respect to the chamber 2, and the communication hole 13 is formed so as to communicate with the chamber 2 at its outer peripheral wall. Further, the communication holes 13 at both ends of the block body are arranged to have a rotationally symmetrical positional relationship. Therefore, when the cleaning water flows into the chamber 2 through both the communication holes, a swirling flow swirling occurs in the chamber 2 as shown by the arrow in FIG.

The nozzle 4 has a washing water jet port 5 on the tip side of the nozzle, and a flow passage 19 for guiding the fluid received in the chamber 2 to the washing water jet port 5. Further, the nozzle 4 is
A pair of blades 15 are provided on the lower end side of the blade, the nozzle tip side above the blades is a reduced diameter portion 7 having a small diameter, and the blade lower side is a tapered projection 11. The nozzle 4 is assembled by inserting the reduced diameter portion 7 into the upper through hole 6A of the upper lid 9, and is rotatable in the through hole, and the position change of the nozzle 4 in the nozzle axis O direction is permitted. Built into. In this case, the nozzle 4 is supported in a state where the lower end projection 11 is inserted into the recess 41 of the lower lid 10.

The flow passage 19 formed in the nozzle 4 has a lateral flow passage portion 19A formed through the blade 15 in the longitudinal direction (radial direction of the nozzle 4) and a nozzle axis O of 1.4.
It is formed so as to communicate with the vertically oriented flow path portion 19B that is inclined.

The tip end opening of the vertically oriented flow path portion 19B is
It is used as the wash water spout 5. Therefore, the cleaning water jet port 5 is inclined by 1.4 degrees with respect to the nozzle axis O, following the above-described inclined direction of the vertically oriented flow path portion 19B.

When the cleaning water is supplied to the chamber 2 by the pump, the chamber 2 is filled with the cleaning water flowing in at a pump pressure from the pair of communication holes 13 in contact with the cleaning water. Therefore, the nozzle 4 receives this cleaning water pressure (pump pressure) from the cleaning water, and changes its position (displaces upward) toward the outer side (upper side) of the nozzle tip. As a result, the end surface A of the nozzle portion having a diameter larger than that of the reduced diameter portion 7 has the upper through hole 6A on the upper lid 9 side.
It contacts the lower end face B (corresponding to the chamber ceiling wall on the opening side). At this time, the rear end side of the nozzle 4 (the side of the protrusion 11) is in a state of floating in the washing water.

Since the cleaning water is continuously supplied to the chamber 2, the cleaning water swirls in the chamber 2 at the above pump pressure as described above. Therefore, the nozzle 4 rotates (rotates) around the nozzle axis O by the wash water pressure (pump pressure) of the swirling wash water. Moreover, the cleaning water in the chamber 2 is guided to the lateral flow passage portion 19A and the vertical flow passage portion 19B and reaches the cleaning water jet port 5. Therefore, the nozzle 4 spouts the wash water from the wash water spout 5 while rotating around the nozzle axis O.

Since the direction of the cleaning water ejection port 5 is set to be inclined with respect to the nozzle axis O, the cleaning water is ejected from the cleaning water ejection port 5 in the direction inclined with respect to the nozzle axis O. , It is ejected in a conical shape with this inclination. In other words, the nozzle 4 can eject the cleaning water onto the peripheral surface of the virtual cone having the extension of the nozzle axis O as the central axis, thereby ejecting the cleaning water over a wide range.

Further, as described above, the nozzle 4 abuts the end surface A of the nozzle portion having a diameter larger than that of the reduced diameter portion 7 on the lower end surface B of the upper through hole 6A due to the displacement of the rising position of itself. Then, seal between both end faces.

In such a sealing condition, although there is a small amount of room for the cleaning water to enter between the both end surfaces, the infiltration cleaning water serves as a lubricant. Therefore, the end surface A of the nozzle portion receives less resistance from the lower end surface B of the upper through-hole 6A, so that the chamber 2
Even if the washing water pressure in the inside is small, it is possible to achieve a good sealing effect and a good nozzle rotation. That is, the cleaning water pressure in the chamber 2, and hence the pump pressure, can be small.

In the cleaning water jetting device 40 having the above structure, the pressure of the cleaning water in the chamber 2 is set to about 0.01MP.
A squirt experiment was carried out as a degree. It has been proved that even with such low-pressure water supply, the cleaning water jetting device 40 of the present embodiment can spray the cleaning water in the conical shape by operating the nozzle 4 without any trouble. For this reason, according to the cleaning water jetting device 40 of the present embodiment, even if the supply pressure of the cleaning water to the chamber 2 is low, the drive unit such as a pump for supplying the cleaning water can be downsized accordingly. It is possible to reduce the operating cost. Moreover, even with the low-pressure water supply as described above, the rotation of the nozzle 4 and the cleaning water jet port 5 thereof could be maintained at a high rotation speed without greatly decreasing the speed. Therefore, even with low-pressure water supply, the above-mentioned conical cleaning water jet can be reliably realized, and the cleaning range is not narrowed.

Further, in the washing water jetting device 40, the nozzle 4
Since the blades 15 for receiving the fluid pressure are provided in the peripheral portion of this, the cleaning water can be efficiently pressured by the blades.
Therefore, since the rotation efficiency of the nozzle 4 can be increased, there is more room for dealing with low-pressure water supply, and it is possible to further reduce the size of the drive unit and reduce the operating cost.

Next, a modification of the above embodiment will be described. FIG. 6 is a schematic vertical sectional view of the cleaning water jetting device 40 of the modification, and FIG. 7 is a horizontal schematic sectional view of the cleaning water jetting device 40 of the modification.

As shown in these drawings, in this modification, the lateral flow passage portion 19A of the washing water flow passage 19 in the nozzle 4 is used as a closed flow passage, and the washing water inlet 42 is penetrated at both ends thereof. Formed. By doing so, the directions of both the inlets are orthogonal to the blade surface of the blade 15, so that the washing water that flows into the lateral flow passage portion 19A from each inlet also flows into the nozzle 4.
To rotate as described above. Therefore, it is beneficial to downsize the driving unit and reduce the operating cost.

Next, another embodiment will be described. Figure 8
Is an explanatory view showing a schematic vertical cross section of a cleaning water jetting device 40 of another embodiment and its principal part in an enlarged manner, and FIG. 9 is a horizontal schematic cross sectional view of the cleaning water jetting device 40.

As shown in the figure, the cleaning water jetting device 40 in this embodiment is different from the washing water jetting device in the first embodiment in the structure of the nozzle 4 and the like. The difference will be described below.

The cleaning water jetting device 40 is also provided with the chamber 2 and the outer periphery of the upper through hole 6A which is the ceiling opening thereof is depressed. Thereby, the upper through hole 6
A is an edge-shaped opening whose axial dimension is reduced. The nozzle 4 is incorporated by inserting the reduced diameter portion 7 on the nozzle tip side into the upper through hole 6A. In the nozzle 4 thus incorporated, in the upper through-hole 6A, the cleaning water jet port 5 is exposed to the outside of the through-hole, and the position of the nozzle 4 is allowed to rotate freely in the direction of the nozzle axis O. It is said that. In this case, the reduced diameter portion 7
The end surface A of the nozzle portion having a larger diameter than that is formed into a spherical shape as shown in the enlarged view of the main part.

The nozzle 4 has a lower end portion 4 having a reduced diameter at its lower end.
4, a round hole-shaped recess 4 on the tip (upper end) side of the lower lid 10.
The lower end portion 44 is inserted in 3. The recess 43 is
Since its diameter is set to be about 1.3 times the diameter of the lower end portion 44, it functions as a guide for the nozzle when the lower end portion 44 changes its position in the recess 43 in the radial direction.

Due to the function of guiding the radial position change of the lower end portion 44 by the concave portion 43 and the narrowing of the axial direction of the upper through hole 6A which is an edge-shaped opening, the nozzle 4 has the central axis P of the upper through hole 6A. It is possible to adopt a posture inclined by about 1.78 degrees. Then, the nozzle 4 can revolve around the central axis P in this inclined posture. Details of how the nozzle revolves will be described later.

In this embodiment, the nozzle 4 forms the flow passage 19 for introducing the wash water to the wash water jet port 5 by the flow passage portion 19A and the flow passage portion 19B. The flow channel portion 19A is a cross-shaped lateral flow channel that is formed so as to pass through in the vicinity of the central portion in the nozzle longitudinal direction so as to be orthogonal to the nozzle axis O. Flow path portion 19B
Is formed vertically along the nozzle axis O, communicates with the flow path portion 19A, and reaches the cleaning water jet port 5 on the tip side.

The cleaning water is supplied to the chamber 2 by a pump (not shown).
, The chamber 2 is filled with the inflowing cleaning water as described above, and the nozzle 4 receives the cleaning water pressure (pump pressure).
Is received from the cleaning water, and the position is changed (moved upward) toward the outer side (upper side) of the nozzle tip. This allows
The end surface A on the larger diameter side than the reduced diameter portion 7 abuts on the lower end surface B (corresponding to the opening side chamber ceiling wall) of the upper through hole 6A on the upper lid 9 side. At this time, the lower end 44 of the nozzle 4 floats in the washing water, and the lower end 44 is recessed 43.
Take the above guide by. That is, the nozzle 4 can take the tilted posture described above.

The nozzle 4 rotates (rotates) around the nozzle axis O by the cleaning water pressure (pump pressure) of the swirling cleaning water in the chamber 2 during continuous supply of the cleaning water to the chamber 2. At this time, the nozzle 4 has an upper through hole 6A.
The nozzle 4 rotates (revolves) around the central axis P of the upper through-hole 6A because it takes a posture inclined with respect to the central axis P. Moreover, the cleaning water in the chamber 2 is guided to the lateral flow passage portion 19A and the vertical flow passage portion 19B and reaches the cleaning water jet port 5. Therefore, the nozzle 4 ejects the cleaning water from the cleaning water ejection port 5 while rotating around the nozzle axis O and revolving around the central axis P in the inclined posture.

As a result, the washing water jet from the washing water jet port 5 becomes a conical shape with the opening center axis P of the upper through hole 6A in the chamber 2 as the center, and the fluid can be jetted in a wide range. . That is, the nozzle 4 can eject the cleaning water onto the peripheral surface of the virtual cone having the extension of the central axis P of the upper through hole 6A as the central axis, and eject the cleaning water over a wide range.

As described above, the nozzle 4 causes the end face A of the nozzle portion to abut on the lower end face B of the upper through hole 6A due to the displacement of the rising position of the nozzle 4, and seals between both end faces. Plan.

In such a sealing condition, although there is a little room for the cleaning water to enter between the both end faces, the infiltration cleaning water serves as a lubricant. Therefore, the end surface A of the nozzle portion receives less resistance from the lower end surface B of the upper through-hole 6A, so that the chamber 2
Even if the washing water pressure in the inside is small, it is possible to achieve a good sealing effect and a good nozzle rotation. That is, the cleaning water pressure in the chamber 2, and hence the pump pressure, can be small.

When the jetting experiment was carried out at the low water supply pressure (about 0.01 MPa) described above for the washing water jetting device 40 having the above structure, the nozzle 4 was operated without any trouble and the washing water was conical. We were able to demonstrate that it can be ejected at.
Therefore, even with the cleaning water jetting device 40 of the present embodiment,
It is possible to reduce the size of a drive unit such as a pump for supplying wash water and reduce the operating cost. Moreover, even with the low-pressure water supply as described above, the nozzle 4 and its cleaning water jet 5
It is possible to maintain a high rotation speed and not narrow the cleaning range.

Further, in this embodiment, when the nozzle 4 adopts the inclined posture, the lower end portion 44 is guided by the concave portion 43, so that the nozzle inclined posture during the revolution of the nozzle around the central axis P of the opening is stabilized. . Therefore, the condition of the jetted cleaning water is stabilized, and the jetted cleaning water can be reliably landed on the cleaning portion and cleaned.

In this case, the nozzle inclination posture can be easily set to a desired posture by variously adjusting the dimensional relationship between the lower end portion 44 and the concave portion 43. For this reason, the landing range (cleaning range) of the spray target (cleaning location) of the spray cleaning water can be adjusted to be wide and narrow.

In addition, in the cleaning water jetting device 40 of this embodiment, the end surface A of the nozzle portion having a diameter larger than that of the reduced diameter portion 7 is formed into a spherical shape in order to bring the end surfaces into contact with each other. Therefore, the rotational resistance that the rotating and revolving nozzle 4 receives from the end surface B on the chamber 2 side can be further reduced. As a result, the efficiency of the revolution of the nozzle 4 is increased, and the adaptability to low water supply pressure is improved. Therefore, it is possible to further reduce the size of the drive unit and reduce the operating cost.

Further, since the end surface A of the nozzle portion having a diameter larger than that of the diameter-reduced portion 7 is spherical, the point contact is stabilized and the wear is prevented due to the contact between the end surface A and the end surface B. Is even more beneficial. In particular, when the nozzle 4 revolves in an inclined posture, the gap portions other than the point contact portions on the both end surfaces around the upper through hole 6A can be narrowed, so that the cleaning water passing through the gap portion can be reduced. Therefore, the wash water can be effectively used for jetting from the wash water jet port 5.

In the above-mentioned embodiment, the nozzle 4 is made of a material excellent in slidability and wear resistance, for example, resin such as polyacetal, nylon, polypropylene, polytetrafluoroethylene, silicone, ABS, PPS, stainless steel or the like. Made of metal. Therefore, it is possible to reliably suppress the wear caused by the contact between the end surfaces and the contact between the lower end portion 44 and the inner wall of the recess 43. In particular, if the nozzle 4 is made of metal, it is possible to improve the efficiency of radiating the wear heat generated by these contacts. As a result, it is possible to avoid melting and sticking of the member due to frictional heat, and it is possible to improve the reliability of the nozzle revolution, and thus the cleaning water jetting. Moreover, if the nozzle 4 is made of metal, the weight of the nozzle can be increased accordingly. For this reason, the inertia exerted by the nozzle is increased, the centrifugal force, which will be described later, that accompanies the revolution of the nozzle is increased, and the inclined posture of the nozzle during revolution is stabilized, which is preferable. When the nozzle 4 is made of metal such as stainless steel, it is more preferable to reduce the surface roughness. It is also possible to use the nozzle 4 in which the site where wear occurs is made of metal and the other site is made of resin. Such a nozzle 4 can be easily manufactured by a so-called two-color molding method of metal / resin.

Next, a modification of the above-mentioned other embodiment will be described. This modified example is different from the other embodiments described above in the nozzle configuration. FIG. 10 shows a cleaning water jetting device 40 of a modified example.
An explanatory view showing a schematic vertical cross-section of FIG.
FIG. 11 is a schematic horizontal sectional view of the cleaning water jetting device 40 of this modification.

The nozzle 4 in this modification is formed to be hollow, and the hollow portion thereof is provided with a flow path 19 to the washing water jet port 5.
And The flow passage 19 has a reduced diameter on the side of the cleaning water jet 5 on the nozzle tip side, and guides the wash water flowing from the lower end of the flow passage to the wash water jet 5 after being rectified in the reduced diameter passage portion. It is also possible to form a plurality of through lateral holes in the peripheral wall of the nozzle 4 so as to receive the cleaning water in the flow passage 19 also from the radially outer side.

The nozzle 4 has a lower lid 10 at its lower end opening.
The convex portion 45 having a truncated cone shape on the tip (upper end) side is inserted. The maximum diameter of the convex portion 45 is set to be about 1 / 1.3 times the size of the lower end side opening of the nozzle 4, so that the convex portion 45 is inserted into the lower end side opening in the lower end side opening. It abuts and functions as a guide when changing the position of the nozzle 4 in the radial direction.

The upper through-hole 6A, which is the ceiling opening of the chamber 2, is an edge-shaped opening having a reduced axial dimension, and a nozzle portion having a diameter larger than the reduced diameter portion 7 of the nozzle 4. The point that the end face A is formed into a spherical surface is the same as the other embodiments described above.

Also in this modified example, the nozzle 4 has an upper through hole due to the function of guiding the radial position of the nozzle 4 by the convex portion 45 and the narrowing in the axial direction of the upper through hole 6A having an edge-shaped opening. About 1.7 with respect to the central axis P of 6A
It is possible to take a posture inclined by 8 degrees. Then, the nozzle 4 revolves around the central axis P in this inclined posture.

Even in this modification, the cleaning water is supplied to the chamber 2 to cause the above-described ascending position displacement of the nozzle 4, and the end surface A on the larger diameter side than the reduced diameter portion 7 is located on the upper lid 9 side. The lower end surface B of the upper through-hole 6A (corresponding to the chamber ceiling wall on the opening side) is brought into contact. At this time, the lower end side of the nozzle 4 is in a state of floating in the washing water, and the nozzle 4 receives the guide by the convex portion 45 through the nozzle lower end side opening and takes the tilted posture described above.

The nozzle 4 adopts such an abutting state to rotate around the nozzle axis O due to the cleaning water pressure and to revolve in the inclined posture around the central axis P of the upper through hole 6A, while maintaining the cleaning water. Cleaning water is ejected from the ejection port 5.

As a result, also in this modified example, the washing water jet from the washing water jet port 5 becomes a conical shape with the opening center axis P of the upper through hole 6A in the chamber 2 as the center, and the fluid is spread over a wide range. Can be gushed out. That is, the nozzle 4 jets the cleaning water onto the peripheral surface of the virtual cone whose center axis is the extension of the center axis P of the upper through hole 6A,
The cleaning water can be jetted over a wide range.

Further, in this modified example, since the flow path 19 is penetrated in the axial direction of the nozzle, the weight of the nozzle 4 can be reduced. Therefore, the inertia exhibited by the nozzle itself becomes small, and it is possible to easily cause an inclined posture and revolve the nozzle due to the fluid pressure, and it is possible to improve the startability and the rotation speed.

Since the contact state between the end surface A on the nozzle side and the end surface B on the chamber side is the same as in the other embodiment described above, the effect of reducing the resistance between both end surfaces, for example, for supplying cleaning water It is possible to achieve the above-described effects such as downsizing of a drive unit such as a pump and reduction of operating cost.

Another modification of the above-mentioned embodiment will be described. The other modified example is different from the above modified example in the manner of holding the nozzle tilt posture. FIG. 12 is an explanatory view showing an enlarged schematic vertical direction cross section of a cleaning water jetting device 40 of another modified example and its essential part, and FIG. 13 is a horizontal schematic cross sectional view of the cleaning water jetting device 40 of this modified example. .

As shown, in this modified example, the lower lid 1
0 is that the above-mentioned convex portion 45 is not provided on the tip (upper end) side, and that the upper lid 9 extends into the chamber 2 and the lower through hole 6B is deep hole-shaped, which is different from the above-described modification. To do.

In this modification, when the nozzle 4 takes an inclined posture and revolves around the central axis P of the upper through hole 6A, the contact between the end faces A and B described above is caused and the upper lid 9 is caused.
The peripheral wall of the lower through hole 6B contacts the nozzle 4 to guide the nozzle 4. Even in this modification, the same effect as that of the above-described modification can be obtained.

In the embodiment and the modified examples described above, in order to supply the cleansing water to the chamber 2, the square block 8 is provided with a pair of communicating holes 13 symmetrically. However, only one communication hole 13 may be formed and the cleaning water may be supplied to the chamber 2 from only one water supply hose 50.

Further, the lower end surface B of the upper through hole 6A may be formed in a spherical shape. Further, the lower end face B of the upper through hole 6A and the end face A of the nozzle portion having a diameter larger than that of the reduced diameter portion 7 are formed.
Both of them can be formed in a spherical shape.

Here, the manner in which the nozzle 4 in the chamber 2 revolves around the central axis P of the upper through hole 6A by the supply of cleaning water in the embodiment and the modification shown in FIGS. 8 to 13 will be described in detail. To do. FIG. 14 is an explanatory diagram for explaining the behavior of the nozzle 4 after the cleaning water flows into the chamber 2 and the state of the force applied to the nozzle 4 over time, and FIG. 15 shows that the nozzle 4 takes such behavior. It is explanatory drawing explaining the appearance of the obtained wash water ejection. In order to simplify the description, a case will be described in which cleaning water is supplied to the chamber 2 from a single communication hole 13.

Now, as shown in FIG. 14, the communication hole 13
Wash water is caused to flow into the chamber 2 (time t0).
When the wash water thus flows into the chamber 2, the wash water causes a swirling flow along the inner wall of the chamber 2 as described above. This swirling flow becomes a swirling flow that swirls around the nozzle 4 (specifically, a large-diameter nozzle portion of the nozzle 4) located in the center of the chamber 2. The flow velocity in this swirling flow is Ui at the communicating portion of the communicating hole 13.
n is the highest.

A place where the inflowing cleaning water first swirls, that is, a peripheral wall portion 2a on the extension line of the opening of the communication hole 13,
A difference occurs between the flow velocity Ua and the flow velocity Ub between the peripheral wall portion 2b and the peripheral wall portion 2b facing each other, and the relationship between them is Ua> U.
b. That is, while the cleaning water is spread (swirled) from the peripheral wall portion 2a to the peripheral wall portion 2b, it is affected by the flow dispersion in the chamber 2, contact of the cleaning water with the inner wall surface of the chamber 2, viscosity of the cleaning water, surface friction, and the like. , The wash water slows down.
Therefore, a flow velocity difference of the wash water occurs around the nozzle 4. In this case, what moves is fluid (cleaning water), but the relative relationship between this cleaning water and the nozzle 4 does not change from the situation in which an object moves in the fluid.

Therefore, when an object moves through the fluid, a lift force acts on the object based on the speed difference of the fluid sandwiching the object between the cleaning water in the chamber 2 and the nozzle 4. The same force as lift is applied to the nozzle 4. This lift acts as one mode of the wash water pressure exerted on the nozzle 4 by the wash water flowing into the chamber 2 as described in the above embodiments and the like. Note that, for convenience, this force is referred to as the lift force, as described above. However, if another phenomenon is used as an example, the fact that the lift force is generated due to the difference in the fluid velocity is as follows. It is similar to the generation of lift force due to the speed difference, that is, the pressure difference.

As shown in FIG. 14, the chamber 2 is crushed.
At time t0 when the rule 4 has entered, the following occurs. this
A swirling flow around the nozzle 4 stopped at time t0 occurs
Therefore, its lift F_LIs the swirling flow of the peripheral wall portion 2a.
It is affected by the speed Ua [m / sec]. And this lift
F_LIs the maximum projected area of the nozzle 4 that receives the lift force.
[m ²], The density of washing water is ρ [kg / m³],
expressed. C in the formula_LIs the lift coefficient.

F _L = (ρ · V ² · C _L · S) / 2 [N]

[0111] Thus the lift F _L acts on the nozzle 4, as a result the nozzle 4 drag _{F D (= (ρ · V} 2
_-CD * S) / 2 [N]) also works. This C _D is the drag coefficient. This drag force also acts as one mode of the wash water pressure exerted on the nozzle 4 by the wash water flowing into the chamber 2 as described in the above-mentioned embodiments and the like.

The maximum projected area S in the above equation is the nozzle 4
Depends on the length (specifically, a large-diameter nozzle portion located in the chamber 2) L [m]. Therefore, if the length L of the nozzle 4 is increased, the lift / drag can be increased.

When a swirling flow around the nozzle 4 occurs in the chamber 2 as shown at time t0 in FIG. 14, lift force acts on the nozzle 4 as described above. This lift acts outward from the center side in the swirling flow on the side of the peripheral wall portion 2a where the flow velocity of the swirling flow around the nozzle 4 is large. On the other hand, the nozzle 4
In the chamber 2, the upper through hole 6A in an inclined posture
Since it can revolve around the central axis P of the
_When it receives _L , it inclines in the direction indicated by the arrow FL in the figure. Thus, when the nozzle 4 tilts toward the inner wall of the chamber 2, the time t
In 1, the lift force F _L and drag F _D are both acts move in the force direction. This resultant force acts in the direction of moving the nozzle 4 along the flow direction of the swirl flow because the drag force is along the flow direction of the swirl flow.

In this case, the passage interval of the swirling flow becomes narrow on the side where the nozzle 4 is inclined, and the swirling flow velocity increases due to this narrowing. Since this situation occurs so that the narrow gap portion moves around the nozzle 4, the portion of the swirling flow having the largest flow velocity also moves along the inner peripheral wall of the chamber 2. Therefore, since the direction of the lift force _{FL and} the direction of the drag force F _D also change with the movement of the portion having the largest flow velocity, the times t2, t3, t
4, the nozzle 4 moves in the flow direction of the swirling flow while maintaining the inclined posture. In this way, when the nozzle 4 starts to revolve under the influence of lift and drag, the chamber 2
A centrifugal force acts on the nozzle 4 in the radial direction.
This centrifugal force also acts as one mode of the wash water pressure exerted on the nozzle 4 by the wash water flowing into the chamber 2 as described in the above-mentioned embodiments and the like.

For this reason, the nozzle 4 takes an inclined posture in the state where the end faces are in contact with each other, and revolves in the chamber 2 around the central axis P of the upper through hole 6A. Nozzle 4
Since the revolution occurs in this way, as described above, the cleaning water is jetted onto the peripheral surface of the virtual cone whose central axis is the extension of the central axis P of the upper through hole 6A, and the cleaning water is spread over a wide range. It gushes out.

While the conical cleaning water is ejected, the maximum inclination angle of the nozzle 4 is restricted by the concave portion 43 or the convex portion 45 or the peripheral wall of the lower through hole 6B. It is designed so that it does not revolve around a large slope.

Moreover, as described above, the nozzle 4 lifts the lift force _FL.
When tilted toward the inner wall side of the chamber 2 under the influence of, the nozzle 4 receives a drag force F _D in the direction directly pushed by the swirling flow of the chamber 2. Therefore, the nozzle 4 in the inclined posture moves in the flow direction of the swirl flow while being in the inclined posture under the influence of the centrifugal force described above, and the revolution of the nozzle 4 is promoted.

Here, the state of such revolving water discharge will be described with reference to the drawings. As shown in FIG. 15, when the nozzle 4 revolves as described above, the wash water ejection port 5 revolves while changing the water discharge direction as the nozzle 4 revolves. Therefore, the cleaning water ejection port 5 ejects the cleaning water while drawing a spirally expanded trajectory, and as a result, realizes the conical cleaning water ejection described above. Therefore, the ejection trajectory of the cleaning water is a conical trajectory having a trajectory much larger than the trajectory of the cleaning water ejection port 5, and the local area can be cleaned over a wide range.

Moreover, in order to carry out such a wide range of cleaning, it suffices to cause cleaning water to flow into the chamber 2 to generate a swirling flow, and the swirling flow causes the nozzle 4 to revolve. That is, the movable member can be only the small nozzle 4 that can be incorporated into the chamber 2 provided in the nozzle arm 31 in the case of extensive cleaning.

Further, the wide area cleaning by the above-mentioned conical cleaning water jet can be easily realized by incorporating the nozzle 4 into the chamber 2 and generating the swirling flow by introducing the cleaning water into the chamber 2. As a result, the structure can be simplified and the cost can be reduced, and the device can be made compact through the simplification of the structure.

Further, the communication hole 13 for inflowing the cleaning water into the chamber 2 has a smaller water passage cross-sectional area than the water supply hose 50, and the flow velocity of the cleaning water flowing into the chamber 2 is increased. Washing water flow rate flowing into the chamber 2, define a lift F _L as previously described. Therefore, if the communication holes 13 (specifically, the corner blocks 8 having the communication holes 13 of various diameters) having various water passage cross-sectional areas are prepared and these are selectively used, the nozzle 4 can be operated. In addition to the lift force F _L , the drag force and centrifugal force can be adjusted. These forces also determine the frequency of the revolution of the nozzle 4. Therefore, the revolution frequency of the nozzle 4 can also be adjusted by adjusting the water passage cross-sectional area of the communication hole 13 or selecting the square block 8. Therefore, there are the following advantages.

When the force and the area at the moment when the washing water hits the object to be washed such as the human body are F1 and ΔS, respectively, the strength of the washing water felt by the human body at a certain moment can be defined as F1 / ΔS. When the nozzle revolution frequency of the nozzle 4 is f1, and when water discharge is continued at this frequency, the total area S that hits the object to be cleaned such as a human body at time intervals of a cycle (Δt = 1 / f1) that is the reciprocal of the frequency f1 , A value obtained by integrating ΔS during this period Δt (S = ∫ΔS).

On the other hand, when a person feels a stimulus with his / her skin or the like, the receptor that feels the stimulus varies continuously depending on the stimulus in the range of several Hz to several hundreds Hz depending on the person and the place where the stimulus is received. Or, the illusion of receiving the same stimulus as continuous is generated. Therefore, at a certain moment, a stimulus of strength F1 / ΔS moves on a trajectory having a period of Δt (total movement trajectory S = ∫Δ
In the case of S), the person has the illusion that he is receiving a stimulus of strength F1 / ΔS over the total area S. This tendency becomes more pronounced as Δt becomes smaller, and starts to be felt at f = about 3 Hz, that is, Δt = about 0.3 seconds.

Accordingly, the revolution frequency f1 of the nozzle 4 is adjusted by adjusting the water passage cross-sectional area of the communication hole 13 and selecting the square block 8.
Can be about 3 Hz or higher. In this way, the washing area can be increased without impairing (decreasing) the stimulation of washing.

Further, the force F1 at the above moment (hereinafter, force F1
, And the amount of jetted cleaning water Q1 can be expressed by the following equation, where S1 is the outlet area and V1 is the flow rate of cleaning water.

F1 = ρ · Q · V1 = ρ · Q ² · Q / S1

As is clear from this equation, the force F1 is proportional to the square of the instantaneous flow rate Q and inversely proportional to the jet outlet area S1. Therefore, when water is saved to reduce the flow rate, the force F1 can be increased by reducing the area S1 of the wash water jet port 5. Therefore, it can be seen that in order to reduce or reduce the amount of water and improve or maintain the stimulation and the cleaning power at the time of cleaning, the jet outlet area S1 should be made small, that is, the flow velocity of the jetted cleaning water should be increased.

The revolution frequency f1 of the nozzle 4 can be set to about 40 Hz or higher by adjusting the water passage cross-sectional area of the communication hole 13 and selecting the square block 8. By doing so, the nozzle 4 can be revolved at high speed, and the cleaning point where the jetted cleaning water reaches can be moved at high speed. Therefore, it is possible to make an illusion that the human body is receiving water over the entire range of water discharge (collection points of water arrival points). Therefore, it is preferable to perform the frequency adjustment as described above, because the illusion of a high-speed movement of the landing point can realize a soft and wide range of cleaning needs. Specifically, in a bidet washing of a female-only cleaning device for a local area sensitive to irritation or a general local area cleaning device, a wide range of spouting water washing can be executed while suitably reducing the feeling of irritation.

In addition, since the above illusion occurs even if the transition of water landing to the cleaning point actually occurs, it is necessary to continuously spout water so that the cleaning water reaches all of the water landing range at the same time. do not do. Therefore, there is a water saving effect.

Next, the manner in which the nozzle 4 in the chamber 2 rotates (spins) around the nozzle axis O by the supply of cleaning water in the embodiment and modification shown in FIGS. 8 to 13 will be described in detail. . 16A and 16B are explanatory diagrams for explaining the relationship between the revolution and the rotation of the nozzle 4, and FIG. 16A is a diagram illustrating the case where the revolution and the rotation of the nozzle 4 have the same rotation direction.
6 (b) is an explanatory view showing a case where the rotation directions of the revolution and the rotation of the nozzle 4 are opposite to each other, and FIG. 17 is an explanatory view for explaining a state of jetting of cleaning water when the nozzle 4 takes the behavior of FIG. 17 (a) is an explanatory view for explaining the state of the cleaning water jet when the nozzle revolution and the rotation are in the same direction, and FIG. 17 (b) is the cleaning water jet when the nozzle revolution and the rotation are in the opposite directions. It is explanatory drawing explaining a mode.

The nozzle 4 revolves in the same direction as the swirling flow shown in FIG. 16 by the swirling flow in the chamber 2. When the nozzle revolves, as described above, only a slight sliding resistance acts on the abutting portions (end surfaces A and B) of the nozzle 4 due to the lubricating function of the infiltration cleaning water described above. Therefore, in a state in which only such contact occurs (for example, in the state in which the lower end portion 44 does not contact the recess 43 in FIG. 8 or a configuration in which such contact does not occur), the nozzle 4 is revolved by the lift force based on the swirling flow. The force (orbital force) resists a slight slip resistance and tries to rotate the nozzle 4 on its own axis. Therefore, the nozzle 4 revolves in the swirling chamber while rotating around the same direction as the swirling direction (revolution direction) of the wash water.

Therefore, the nozzle 4 which revolves in the same direction and revolves around the nozzle jets the cleaning water in the locus schematically shown in FIG. 17 (a). In FIG. 17A, the direction of the rotation trajectory of the wash water at the wash water jet port 5 due to the rotation of the wash water and the movement trajectory of the wash water due to the nozzle revolution on an arbitrary plane perpendicular to the jet direction can be understood using the arrows. Easy to show. That is, the cleaning water is spouted while rotating counterclockwise by the rotation of the nozzle 4, and such spouting revolves counterclockwise by the revolution of the nozzle 4. Therefore, on the outer circumference of the revolution path of the wash water, the direction of revolution of the wash water and the direction of revolution coincide with each other. Receive resistance. This air resistance causes the wash water to
With the passage of time, turbulence is generated from the collected water flow, and the water drops are torn and dispersed. For this reason, in this situation, the cleaning water ejected from the nozzle 4 advances in the form of dispersed water droplets along the revolution orbit and lands on the human body, so that a wider area can be cleaned more softly.

On the other hand, in the nozzle 4 shown in FIGS. 8, 10 and 12, when the nozzle revolves, in addition to the end face contact,
It contacts the inner wall of the recess 43, the outer wall of the protrusion 45, or the inner wall of the chamber 2. In this state, the slip resistance against the revolution of the nozzle 4 is higher than that in the above-described state, so that the revolution force may not cause the nozzle 4 to rotate in the same direction as the revolution direction. Even in this case, since the nozzle 4 revolves due to the revolution force, the nozzle 4 receives the sliding resistance at the contact point and receives the slip resistance at the inner wall of the recess 43 or the protrusion 4.
5. Rotate while inscribed on the outer wall or the inner wall of the chamber 2.

The rotation direction in this case is determined by the position where the nozzle 4 receives this slip resistance. That is, in the case of the outer wall of the convex portion 45 shown in FIG. 10, the direction is the same as the revolving direction of the nozzle 4, and the nozzle 4 revolves in the same direction while revolving and spouts the cleaning water. On the other hand, the recess 43 in FIG. 8 or FIG.
In the case of the inner wall or the inner wall of the chamber 2, the direction of rotation is opposite to the direction of revolution of the nozzle 4, and the nozzle 4 revolves and revolves in the opposite direction to discharge cleaning water. When the rotation direction of the nozzle is the same as the revolution direction, the rotation energy of the jetted cleaning water acts on the revolution of the nozzle.
The nozzle revolution can occur more efficiently.

The nozzle 4 which revolves orbits and rotates in the opposite direction ejects cleaning water in the locus schematically shown in FIG. 17 (b). In other words, the cleaning water is ejected while rotating clockwise by the rotation of the nozzle 4, and the cleaning water is revolved counterclockwise by the revolution of the nozzle 4. Therefore, on the outer circumference of the revolution path of the wash water, the rotation direction of the wash water is opposite to the revolution direction of the wash water. Therefore, the comparison of the wash water occurs on the outer circumference of the revolution trajectory due to the difference between the rotation speed of the wash water and the revolution speed of the wash water. Only receives small air resistance. Since the air resistance is relatively small,
The wash water is jetted continuously in a relatively concentrated water flow state without being dispersed so much. Therefore, under this condition, the wash water ejected from the nozzle 4 lands on the human body in a relatively concentrated water flow state, so that more intense and strong wash can be performed. Further, since the spouted water is collected, it is possible to perform cleaning with less scattering.

As shown in FIG. 16, if the communication holes 13 have different diameters, the flow rates of the washing water flowing into the chamber 2 can be made different. Therefore, the above-described speed difference can be easily created, which is useful for generating lift or the like due to the swirling flow in the chamber 2. Needless to say, it is preferable that the communication holes 13 have the same diameter.

Next, the point in which the nozzle 4 is inclined with respect to the central axis of the opening of the chamber 2 will be described in detail. FIG. 18 is an explanatory diagram illustrating a first method when the nozzle 4 is in the inclined posture.

As shown in the figure, in order to adopt the first method, the chamber 2 has a ceiling opening 2A in its ceiling wall, and has a tapered wall-shaped guide hole 2B and a bottom hole 2C below it. . The ceiling opening 2A is an opening corresponding to the upper through hole 6A in the cleaning water jetting device 40 shown in FIG. 8 and the like, and is an edge-shaped opening having a small axial dimension.

The washing water flowing into the chamber 2 through the communication hole 13 becomes a swirling flow as described above in the chamber 2 including the bottom hole portion 2C, and causes the above-described revolution of the nozzle 4. The nozzle 4 takes an inclined posture due to the lift force and the like associated with the revolution of the nozzle. At this time, the nozzle 4
The reduced diameter portion 7, the large diameter portion 4A, and the stepped end surface 7A (the end surface A in the above embodiment) are brought into contact with the ceiling wall 2D of the chamber 2. The nozzle 4 causes such contact on the side of the reduced diameter portion 7 and also causes the peripheral wall of the large diameter portion 4A to contact the edge portion of the lower end of the guide hole portion 2B. That is, the nozzle 4 abuts at the two abutting points T1 and T2 shown in the figure, the inclined posture is defined at both abutting points, and the posture is stabilized.

Moreover, since the contact points T1 and T2 are separated from the ceiling wall 2D and the lower edge portion of the guide hole portion 2B of the chamber side wall, the inclination posture can be further stabilized. Further, since the abutting portions are separated from each other in this manner, even if the ceiling opening 2A has a small diameter, it does not affect the expression and reproducibility of the nozzle tilt posture. Moreover, if the ceiling opening 2A has a small diameter, the space around the ceiling opening also becomes small, so that the passing fluid amount can be reduced while ensuring the lubricating function by the leaked cleaning water.

Then, the nozzle 4 spouts the washing water while revolving around the central axis of the ceiling opening 2A in the inclined posture defined as described above. The appearance of this flush water is shown in Fig. 1.
This is as described in 5. The nozzle 4 described with reference to FIG. 8 is similar to the tilt posture regulation according to the first method,
The contact at the end surfaces A and B is the contact at the contact point T1, and the contact between the recess 43 and the lower end portion 44 is the contact at the contact point T2. Even in the nozzle 4 described in FIG. 10, this first method is adopted, and the contact at the end faces A and B becomes the contact at the contact point T1, and the contact between the convex portion 45 and the nozzle lower end side opening. Is the contact at the contact point T2.

Therefore, even if the nozzle inclination posture is defined by this first method, the jet of cleaning water from the nozzle 4 becomes a conical shape centering on the central axis of the ceiling opening 2A in the chamber 2 and is wide. Fluid can be ejected into the area.

When the nozzle revolves in such an inclined posture, the lubricating function is exerted by the leakage cleaning water as shown in the figure. Therefore, as described above, since the resistance that the nozzle 4 receives from the ceiling wall 2D of the chamber 2 can be reduced, there are the above advantages that the drive unit can be downsized, and the operating cost can be reduced. Even if the wash water supply pressure is low, the rotation of the nozzle can be maintained at a high speed, so that the extent of spread of the jetted wash water is not narrowed.

Further, in this first method, the rotation resistance at the contact point T1 of the ceiling wall 2D is small due to the lubricating action of the leak cleaning water, and furthermore, even at the contact point T2, there is point contact. Only a small rotation resistance works. However, since the nozzle 4 is free in the chamber,
Since these rotational resistances act as frictional resistances on the nozzle 4, as described with reference to FIG.
Rotates about its own central axis. For this reason, the contact point T1 of the nozzle 4 with respect to the ceiling wall 2D does not cause a situation in which a certain part of the contact point T1 changes around the rotation axis due to the rotation of the nozzle and remains in contact with the ceiling wall 2D. Therefore, the wear of the nozzle 4 can be reliably suppressed.

Further, since the reduced diameter portion 7 at the tip of the nozzle is inserted in the ceiling opening 2A, the cleaning water passing through the gap around the ceiling opening 2A does not interfere with the jet cleaning water. For this reason, since the conical jetted washing water is not disturbed, the jetting of the washing water can be stabilized.

The first method can be realized also as follows. FIG. 19 is an explanatory view for explaining another aspect in the case of adopting the first method of defining the nozzle inclination posture, and FIG. 20 is the first diagram.
It is explanatory drawing explaining the other aspect of the method.

As shown in the figure, in these modes, the nozzle 4 does not have the diameter-reduced portion 7 and is composed of only the large-diameter portion 4A. Even in this nozzle 4, the tip portion 4B of the large-diameter portion 4A is brought into contact with the ceiling wall 2D at the contact point T1 instead of the stepped end surface 7A, and the other end is contacted at the contact point T2. In FIG. 19, the tip portion 4B is tapered, and in FIG. 20, it is spherical.

In such a mode, the nozzles 4 are all incorporated in the chamber 2 and do not project outside the chamber, but the cleaning water jet port 5 is connected to the ceiling opening 2 of the chamber 2.
There is no change in being exposed to the outside of A.

Even in the embodiment shown in FIGS. 19 and 20, the nozzle 4 can achieve the same effects as the nozzle having the diameter-reduced portion 7. In particular, such an aspect has the following advantages.

Since it is not necessary to insert the reduced diameter portion 7 into the ceiling opening 2A, the diameter of the ceiling opening 2A can be reduced accordingly. Therefore, the gaps around the ceiling opening 2A are also reduced, so that the amount of passing wash water can be further reduced while maintaining the lubrication function by the leaked wash water.

Further, since there is no nozzle protrusion to the outside of the chamber 2, even if the chamber 2 is brought close to the cleaning location,
Do not let the nozzle touch the cleaning area. For this reason, the situation in which the nozzle revolution is stopped from the outside is not brought about and there is no hindrance to the jet of cleaning water.

In addition, the ceiling opening 2A can be made small to the extent that it does not hit the water, and the diameter of the movement locus of the contact point T1 can also be made small. Therefore, the range where the water pressure is applied in the chamber is narrowed, and the rotation of the nozzle can be maintained even if the wash water supply pressure is low.

FIG. 21 is an explanatory diagram for explaining the second method when the nozzle 4 is in the inclined posture, and FIG. 22 is an explanatory diagram for explaining the third method when the nozzle 4 is in the inclined posture. Figure 2
As shown in FIG. 1, in the second method, in addition to the contact of the step end surface 7A at the contact point T1, the nozzle 4 contacts the outer periphery of the reduced diameter portion 7 with the opening wall of the ceiling opening 2A at the contact point T3. Contact. Even in this case, the nozzle inclination posture is defined by the contact at these two points, and the posture is stabilized.

In the mode shown in FIG. 21, the reduced diameter portion 7 is inserted and disposed in the ceiling opening 2A, so that the above-described effect can be obtained and the following advantages are also obtained.

As described above, the nozzle inclination posture occurs at the contact point T3 of the ceiling opening 2A and the contact point T1 of the ceiling wall 2D, and these contact points are located with the ceiling opening 2A in between.
Therefore, by adjusting the diameter of the ceiling opening 2A, it is possible to adjust the nozzle inclination posture by separating or bringing the contacting points apart from each other. Since the ceiling opening 2A can be easily post-processed from the outside of the chamber 2, the nozzle inclination posture can be easily adjusted. Particularly, if the ceiling opening 2A and the guide hole portion 2B are formed by the upper lid 9 as shown in FIG. 8, the nozzle tilt can be changed through the replacement of the upper lid 9 having various opening diameters and guide hole shapes. The posture can be adjusted easily.

Further, since the contact is caused at the small diameter reduced portion 7 at the tip of the nozzle, the peripheral speed of the rotation of the nozzle can be reduced by the smaller diameter of the contact portion. For this reason, even if the same portion abuts due to the incomplete rotation of the nozzle, the peripheral speed is low, and therefore the abrasion of the abutting portion T3 around the opening can be suppressed. Moreover, due to the lubricating action of the leaked cleaning water,
The wear of the contact portion T3 around the opening can be suppressed more effectively.

In the embodiment shown in FIG. 22, the above-mentioned contact point T
In addition to 1 and T3, the nozzle 4 also abuts at the abutment point T2 at the edge portion of the lower end of the guide hole 2B. Therefore, in this aspect, since the tilted posture is defined in three places, the tilted posture can be more stably ensured. Moreover, since the number of contact points when adopting the inclined posture increases, even if the wash water supply to the chamber 2 is at a high water supply pressure, the nozzle inclined posture can be more reliably maintained and a stable conical shape can be obtained. It is possible to spout the washing water and to spout the washing water accurately to a desired range.

Here, a modification of the above-described method of taking the inclined posture will be described. FIG. 23 is an explanatory view for explaining another method of setting the nozzle 4 in the inclined posture, and FIG. 24 is an explanatory view for explaining a modified example of this method.

As shown in FIG. 23, when the nozzle 4 makes contact at the contact points T1 to T3 described above, the contact point T2 is the nozzle lower end opening and the convex portion 45. Even in this case, the nozzle tilt posture can be stabilized, and the above effects can be achieved. Further, as shown in FIG. 24, a bottomed hole 4D is provided at the lower end of the nozzle, and the contact point T2 is
The bottomed hole 4D and the convex portion 45 may be used. In this case, the flow path 19 may be vertical and horizontal flow path portions 19A and 19B.

The method shown in FIGS. 23 and 24 can also be performed as follows. That is, the nozzle 4 may be in contact with the contact point T1 of the ceiling wall 2D and the contact point T2 of the convex portion 45, and the nozzle inclination posture may be defined by these contact points.

Here, the point of causing the above-mentioned ascending position displacement of the nozzle 4 in defining the nozzle inclination posture by the method shown in FIGS. 18 to 24 will be described. FIG. 25 is an explanatory diagram for explaining how the nozzle 4 is displaced upward as the cleaning water is supplied.

As shown in the figure, at time t0 before water supply,
The nozzle 4 is at the bottom of the chamber 2 due to its own weight Mg.
Now, assuming that the wash water supply is started at time t1, the chamber 2 is filled with the wash water supplied at the supply water pressure P1. The nozzle 4 receives this water supply pressure P1 as the pushing force F _U and starts rising. Such washing water supply at the same time (time t2), since the swirling flow as described above in the chamber 2 occurs, the nozzle 4 receives lift F _L and drag F _D based on the swirling flow as described previously inclined To start.

In such a water supply condition, the nozzle 4 receives the reaction force F _d due to the jet of cleaning water, but since the pushing force F _U based on the water supply pressure exceeds this, there is no problem.
Further, although the cleaning water leaks from the gap DN between the step end surface 7A of the nozzle 4 and the ceiling wall 2D, the cleaning water has a lubricating action at the start of the revolution of the nozzle that starts thereafter.

Since the amount of wash water supplied increases with time until it reaches the set flow rate, during that time, the lift _FL and drag F _D increase as the flow rate increases. Therefore, the nozzle 4 is further inclined (time t3). Since such inclination and the above-mentioned nozzle rise occur at the same time, the nozzle 4 rises until it is limited by the ceiling wall 2D, and the contact point T1 ,.
The tilted posture is defined by T2 (time t4), and revolves stably in this tilted posture. The time t1 described above
After that, since the nozzle 4 receives the lift force _FL and the drag force F _D and starts to revolve, centrifugal force also acts on the nozzle inclination. Therefore,
The nozzle 4 quickly tilts.

[0165] Thus, the nozzle 4 is a previous free state in which the increase in the ceiling wall 2D is restricted, receives a force (lift F _L-drag F _{D-centrifugal} force) resulting in tilting-revolution of the nozzle . Therefore, these forces are more effective in the nozzle 4
Therefore, the nozzle can be inclined and the nozzle can easily revolve around the nozzle, and the revolving startability in the inclined position can be improved. Further, the startability is further enhanced by the lubricating action of the cleaning water in the gap DN from the beginning of the water supply.

In the nozzle in which the step end surface 7A is in contact with the ceiling wall 2D, since the nozzle tilts in this state, the tilting / revolving force (lift F _L , drag F _D , centrifugal force) is generated. There is a loss in the transmission of. Therefore, in such a case, the startability is inferior to that of the above-described displacement of the rising position of the nozzle, but there is no particular problem in practical use.

Next, the mode of nozzle contact with the ceiling wall 2D of the chamber 2 will be described. FIG. 26 is an enlarged view of an essential part of the modified example of the contact state between the ceiling wall 2D of the chamber 2 and the stepped end surface 7A of the nozzle 4, and FIG. 26 (a) shows the nozzle stationary state. , FIG. 26
(B) is an explanatory view showing a nozzle inclined state.

As shown, the chamber 2 has an annular ridge 2E on the ceiling wall 2D. The annular ridge 2E is bulged toward the chamber, following the opening wall of the ceiling opening 2A, and contacts the step end surface 7A of the nozzle 4. Chamber 2
When the washing water is supplied to the nozzle 4 and the nozzle 4 is displaced and tilted as described above, the nozzle 4 contacts the annular ridge 2E at one point (contact point T1) of the ridge of the annular ridge 2E. The contact point T1 moves around the ceiling opening as the nozzle revolves.

Therefore, the nozzle 4 is brought into contact with the annular protrusion 2E.
Since it occurs only at this point, it is possible to stabilize the point contact state associated with the contact at the contact point T1, and it is useful for preventing wear of the step end surface 7A and the annular ridge 2E. Moreover, even if abrasion occurs, as long as the worn portion stops at the annular ridge 2E, the annular ridge 2E having the shape after the abrasion causes the nozzle 4 to make point contact (contact) in a stable state.
This is useful for stabilizing the nozzle tilt posture.

In this case, if the stepped end face 7A is formed into a spherical shape or a tapered shape as described above, it is more useful for stabilizing the point contact associated with the contact with the annular ridge 2E and preventing the above wear.

Further, the nozzle contact on the ceiling wall 2D of the chamber 2 can be modified as follows. FIG. 27
FIG. 6 is an explanatory diagram illustrating a modified example of the contact state between the ceiling wall 2D of the chamber 2 and the nozzle 4.

As shown in the figure, the nozzle 4 has a thrust bearing 7C at the base of the diameter-reduced portion 7, and the bearing is used to make contact with the annular ridge 2E. This way, the nozzle 4
In addition to increasing the rotation efficiency, the wear of the annular protrusion 2E can be prevented more effectively. In this case, the upper plate of the thrust bearing 7C is more preferably tapered as shown in the drawing, and may be spherical. The nozzle 4 is not limited to the one having the annular protrusion 2E, and the nozzle 4 may be incorporated in the chamber 2 having the ceiling wall 2D having no protrusion.

Next, another embodiment will be described. In this embodiment, the jet of washing water accompanying the above-mentioned revolution of the nozzle is applied to a device other than the human body local washing device. FIG. 28 shows a shower device 291 to which spray of cleaning water is applied in accordance with the revolution of the nozzle.
28A is a lateral cross-sectional view of the shower device 291 and FIG. 28B is a cross-sectional view of the shower device 291 in FIG. 28A taken along the line AA. is there. FIG. 29 is an explanatory view for explaining how the wash water from the shower device 291 is discharged.

As shown in FIG. 28A, the shower device 291 is provided with a water passage 296 and a buffer chamber inflow passage 295 having a passage area narrower than that of the water passage 296, and wash water is supplied to the buffer chamber 298 with high kinetic energy ( That is, at a high flow rate). A plurality of chambers 294 are arranged in the buffer chamber 298. Each chamber 294 is surrounded by a swivel guide 294a that reaches the head cover 299, and the guide guides washing water into the chamber 294 from the opening along the inner wall of the guide. Therefore, the chamber 294 generates a swirl flow inside thereof, and is exactly the same as the chamber 2 in the above-described embodiment and modification in the function (generation of swirl flow).

The head cover 299 has a ceiling opening 299A.
Are provided in a scattered manner, and the respective ceiling openings 299A are located substantially in the center of the bottom surface of the chamber 294. Incidentally, even in this ceiling opening 299A, the outer side thereof is depressed like the ceiling opening 2A.

Each chamber 294 has a chamber shown in FIG.
The nozzle 4 as shown in FIG. The nozzle 4 has its flushing water ejection port 5 exposed from the ceiling opening 299A to the outside. Further, the nozzle 4 adopts the above-described inclined posture in a state where the step end surface 7A is brought into contact with the head cover rear surface wall around the ceiling opening 299A and the nozzle side wall lower end is brought into contact with the inner wall of the swivel guide 294a. As described above, the nozzle 4 is provided with the vertical and horizontal flow paths 19, and the cleaning water in the chamber 294 is guided to the cleaning water ejection port 5 at the tip of the nozzle through this flow path and ejected. Note that the nozzle 4 having the vertical and horizontal flow paths 19 shown in FIG. 8 is drawn in FIG. 28, but it is also possible to have the nozzle through flow path 19 as shown in FIG.

Therefore, when the wash water flows from the buffer chamber inflow passage 295 into the buffer chamber 298, and the wash water flows into the respective chambers 294, the wash water flows along the inner peripheral wall surface of the chamber 294. It causes a swirling flow around the nozzle 4. As a result, the lift force acts on the nozzle 4 as described above, and the nozzle 4 moves to the ceiling opening 299.
It revolves around the central axis of A.

A shower device 291 having such a configuration
In this case, since the nozzle 4 is revolved in each chamber 294, the cleaning water jetted from each nozzle 4 is revolved as described in FIG.
The water discharged from the shower device 291 as a whole is shown in FIG.
As shown in FIG. 9, the revolving jets from the respective nozzles 4 are collected, and the washing water spouted from the respective nozzles 4 are revolving jets independent of each other.

Therefore, also with this shower device 291, the same effects (wide range ejection, miniaturization, etc.) as those of the above-described embodiments and their modifications can be obtained. In particular, since the shower device is used for washing hair for a relatively long time, in the present embodiment, the water saving effect is enhanced through the wide range jet with a low water supply amount.

Further, the revolution frequency of the nozzle 4 in each chamber 294 can be set to about 3 Hz or higher by adjusting the flow rate as described above. In this way, the revolving jet from each nozzle 4 gives a feeling as if the water is uniformly sprayed as described above.
Since the orbital jets are gathered together, the shower water discharge as a whole gives a feeling of being uniformly hit.

Further, the nozzle revolution frequency is increased to 40
If the frequency is higher than Hz, it is possible to eliminate the unpleasant sensation at the time of washing, even if the human body is sensitive to cutaneous sensations, cuts, abrasions, and the like. If this frequency is made higher, the feeling of water discharge received by the human body comes closer to the feeling that water is discharged uniformly over the entire landing area. Then, when the nozzle revolution frequency is about 160 Hz, it is only possible to obtain the sensation that the water is uniformly sprayed over the entire landing area.

As the nozzle revolution frequency is increased in this way, the centrifugal force and the air shear applied to the jetted cleaning water increase, which causes dispersion and scattering of the jetted cleaning water. Therefore, when it is desired to limit the dispersion or splashing of the jet cleaning water, the nozzle revolution frequency may be set to about 160 Hz or less.

In the above shower device 291, the nozzles 4 are brought into contact with each other by the head cover 299.
It is not limited to this. For example, it is possible to directly form a plurality of chambers 294 in the shower device 291 without providing the buffer chamber 298 and to branch the wash water into each chamber. Further, the nozzles 4 incorporated in the respective chambers 294 can also be nozzles having only the large diameter portion 4A without the reduced diameter portion 7 as shown in FIGS. 19 and 20. In this way, since the nozzles do not protrude outside the head cover 299, even if the shower device 291 is close to the cleaning portion, the nozzles do not touch the cleaning portion. For this reason, the situation in which the nozzle revolution is stopped from the outside is not brought about and there is no hindrance to the jet of cleaning water. Therefore, the user does not feel uncomfortable when showering.

Next, another example of revolving jetting of the cleaning water accompanying the revolution of the nozzle will be described. FIG. 30 is a schematic perspective view of a portable body part cleaning apparatus 300 for a human body, which employs the revolving jet accompanying the revolution of the nozzle.

As shown in the figure, this human body local cleaning device 3
00 has a tank 301 and a nozzle arm 302 that can move forward and backward with respect to the tank. Nozzle arm 3
When the cleaning water in the tank 301 is pushed out by the pump holding the tank or the dry battery as a drive source, the 02 is moved to a predetermined position by receiving the water pressure, and then ejects the cleaning water. There is.

This nozzle arm 302 is provided with a chamber (not shown) and the above-mentioned nozzle 4 on the nozzle tip side,
As described above, the nozzle 4 is provided in the chamber so as to be able to revolve in an inclined posture. Then, the cleaning water is supplied to the chamber to generate a swirl flow, and the revolution of the cleaning water during the local cleaning is jetted out.

In this human body local cleaning device 300, since the nozzle revolves and jets based on the swirling flow, it is possible to eliminate the dissatisfaction that the cleaning water in the tank 301 is immediately exhausted by improving the water saving efficiency as described above. In addition, since it is lightweight because it does not require an actuator, it is suitable for carrying, and while being a portable type, the cleaning range can be expanded,
The cleaning power can be improved at the same time.

Next, another example of revolving jet of wash water will be described. FIG. 31 is a schematic perspective view of a dishwashing apparatus 310 to which the revolution of the washing water is ejected along with the revolution of the nozzle, and FIG. 32 is an explanatory diagram for explaining a rotary washing arm 320 included in the dishwashing apparatus 310.

As shown, the dishwasher 310 is
Upper and lower doors 311 and 312 on the front surface of the apparatus are provided, and the cleaning chamber 313 is closed by these doors. The cleaning chamber 313 is provided with two upper and lower rows of rotary cleaning arms 320 that rotate while ejecting cleaning water.

The rotary cleaning arm 320 is rotatably supported by a column 321 at the center thereof, and has two nozzles 4 at each of the left and right ends sandwiching the column 321. The nozzle 4 has the above-described chambers 2, and also has a water supply pipe line (not shown) for supplying cleaning water to each chamber 2 from the tangential direction to generate a swirling flow of the cleaning water. In this case, the chamber 2 and the nozzle 4 can be various ones described in the above-described embodiment or its modification. For example, the chamber 2 and the nozzle 4 shown in FIGS. 8 to 13 or 18 to 27 can be used.

In this dishwasher 310, the respective nozzles 4 shown in FIG. 32 are arranged such that the direction of jetting of the washing water is directed obliquely, and the nozzles on the left and right of the rotary washing arm 320 have the direction of jetting of the washing water. So that it is the opposite. That is, the nozzle 4 on the left side in the drawing ejects cleaning water toward the back side with respect to the paper surface, and the nozzle 4 on the right side ejects toward the front side with respect to the paper surface. Therefore, when cleaning water is ejected from the nozzles at the left and right ends of the rotary cleaning arm 320, the reaction force generated by the ejection of cleaning water is applied to the rotary cleaning arm 320 in the same direction.

In order to make the direction of the jet of cleaning water oblique, the central axis of the ceiling opening (not shown) in the chamber 2 may be formed obliquely in line with this direction.

In this dishwashing apparatus 310, the nozzles 4 on the left and right of the rotary washing arm revolve around the nozzles in an inclined posture as the washing water is supplied, so that the washing water is ejected as shown in FIG. To do.

Even in the dishwasher 310, since the respective nozzles 4 are revolvingly ejected, as described above, the water-saving efficiency is improved and the washing ability (the stain removing ability of dishes) is improved. It is possible to expand the cleaning range (watering range). In particular, in view of the characteristic of washing dishes, the advantage that a high washing ability can be exhibited with a small amount of washing water is preferable.

If necessary, the nozzle 4 described above can be fixedly installed on the wall surface of the cleaning chamber 313. For example,
Clean the rice bowl with the chawanmushi, which is said to be difficult to remove.
It is stored in the strong cleaning basket 3 and cleaning water is jetted (revolution jet) from the nozzle 4 fixed on the wall surface to the strong washing basket. By doing so, even tableware cooked with cabbage can be suitably washed with high washing ability. In addition, in such a wall surface fixed nozzle, the existing normal nozzle may be removed, and the nozzle 4 and the chamber 2 may be assembled and replaced. By doing so, the existing dishwashing device can be easily modified into one having excellent water-saving property and high cleaning ability.

In addition, the dishwasher 310 described above has the following advantages. When water is ejected from each nozzle 4 of the rotary cleaning arm 320 as described above, the rotary cleaning arm 320 is rotated by the water ejection reaction force. Therefore, the rotating cleaning arm 320
It is possible to pour the washing water ejected from each nozzle 4 onto the dishes while rotating the nozzle. Therefore, it is possible to further enhance the cleaning ability of the tableware, and the cleaning chamber 3
You can wash the dishes thoroughly by spraying the washing water to all 13 corners.

Further, as described above, in the rotary cleaning arm 320, the chamber 2 takes an oblique posture with respect to the rotary cleaning arm 320, and the nozzle 4 is incorporated in the chamber 2. Therefore, the nozzle 4 after assembling is tilted in the chamber 2 during non-cleaning, and forms a narrow space between the nozzle outer wall surface and the chamber inner wall surface around the nozzle.

Therefore, in this situation, when the cleaning water is supplied to the chamber 2 from the tangential direction, the flow velocity of the swirling flow increases in the narrow portion with the above-mentioned interval. Therefore, the flow velocity difference described above can be reliably generated around the nozzle 4. Therefore, the nozzle revolution based on the above-mentioned lift is surely caused,
The reliability of orbital ejection can be improved. Moreover, since the nozzle 4 is oblique to the chamber 2 from the beginning,
The collision of the swirl flow also occurs from the beginning of the inflow, and the nozzle 4 is pushed by the swirl flow. Therefore, the nozzle 4 promptly revolves around the nozzle, and the revolution ejection can be started from the beginning of the flush water supply.

In this case, the situation in which the chamber 2 and the nozzle 4 are relatively inclined before the start of cleaning as described above can be easily realized by the above-described embodiment and its modification. For example,
In the human body local cleaning apparatus of FIG. 2, since the nozzle arm 31 advances and retracts obliquely, the nozzle 4 in the cleaning water jetting device 40 at the tip of the arm is oblique to the chamber 2, which has the above advantages.

In the dishwasher 310 described above, the rotary washing arm 320 is rotated by utilizing the spouting reaction force, but the present invention is not limited to this. For example, the rotary cleaning arm 320 may be rotated by a motor or the like, and the nozzle 4 may be disposed upward on the rotary cleaning arm 320.

Alternatively, the nozzle 4 may be provided upward on the upper surface of the rotary cleaning arm 320, and the nozzle 4 may be provided on the side surface of the rotary cleaning arm 320. By doing so, the nozzle 4 on the side surface rotates the rotary cleaning arm 320 by the jet reaction force while cleaning the dishes on the side of the rotary cleaning arm 320. On the other hand, the nozzle 4 on the upper surface cleans the dishes above the rotary cleaning arm 320.

Next, another example of revolving jet of wash water will be described. FIG. 33 is an explanatory view for explaining a schematic configuration of a bath cleaning device 350 to which the revolution spray of the cleaning water accompanying the nozzle revolution is applied.
FIG. 34 is an explanatory diagram for explaining how the nozzle 4 is tilted by the guide hole 2B of the chamber 2 used in the bath cleaning apparatus 350.

As shown, the bath cleaning device 350 is
A plurality of chambers 2 are provided on the inner peripheral wall of the bath 352, and the detergent and washing water (tap water) are jetted toward the opposing inner peripheral wall of the bath from the nozzle 4 incorporated in the chamber.
This bathtub cleaning device 350 has a switching valve 358 that switches between supply of cleaning water from a water pipe and detergent supply of a pump 356 from a detergent tank 354. The switching valve 358 controls switching of water supply by the control device 360, and the bath washing operation including this water supply switching is performed by an instruction from the remote controller 362. A check valve for preventing backflow is provided in each of the wash water supply pipe and the detergent water supply pipe upstream of the switching valve 358.

In the chamber 2 of this embodiment, as described with reference to FIG. 18, the contact portion T1 of the ceiling wall 2D and the guide hole 2 are provided.
The contact point T2 of B defines the nozzle inclination posture. Then, as shown in FIG.
Has an elliptical guide hole 2B that causes nozzle contact at the contact point T2 in a horizontal cross section, and the elliptical guide hole 2B regulates the inclination of the nozzle 4. In other words, the nozzle 4 starts to revolve due to the swirling flow in the chamber 2 described above, but when it comes into contact with the guide hole 2B, it revolves along the locus indicated by the alternate long and short dash line in the figure following the shape of the opening. For this reason, in the bath cleaning device 350, the jet of cleaning water from each nozzle 4 has a flat conical shape. In this case, the flat direction is the lateral direction on the inner peripheral wall of the bathtub, and the locations of the nozzles 4 and the chambers 2 are near the normal water level on the inner peripheral wall of the bathtub.

When the bath remote control start operation is performed by the remote controller 362, the control device 360 receives the signal and switches the switching valve 358 to the detergent water supply and the pump 35.
Drive 6 to supply detergent water. As a result, the inner peripheral wall of the bath receives splashes of the detergent from the respective nozzles 4 around the inner peripheral wall of the bath within a range including the vicinity of the normal water level. When such detergent water is supplied for a predetermined time, the control device 360
When the pump is stopped, the switching valve 358 is switched to the wash water supply to supply the wash water. As a result, the inner wall of the bathtub
In the range including the vicinity of the normal water level, the washing water is sprayed from the respective nozzles 4 around the inner peripheral wall of the bath. Then, the control device 360 alternately repeats such detergent spraying / cleansing water spraying, and carefully performs cleaning water supply at the last stage, and finishes the cleaning operation of the inner peripheral wall of the bathtub.

Therefore, the bathtub cleaning device 350 of this embodiment is used.
According to the method, the washing water and the detergent are sprayed concentrated on the inner peripheral wall of the bathtub near the normal water level where the dirt adheres significantly, so that the bath washing can be suitably performed. In addition, in cleaning the bathtub, the nozzle 4 that ejects cleaning water accompanying the revolution of the nozzle
The above-mentioned effects (improvement of water saving, improvement of cleaning ability, etc.) provided by can be exhibited.

The embodiments of the present invention have been described above.
The present invention is not limited to the above examples and embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention. For example, the numerical values given in the embodiments and modified examples are examples, and the numerical values are not limited to these exemplified numerical values. Further, as shown in FIG. 4, the nozzle 4 that causes the revolution in the above-described inclined posture is the cleaning water jet port 5 and the flow path 1 that are inclined with respect to the central axis of the nozzle.
Can have 9. By doing so, the cleaning water that is ejected in a conical shape as the nozzle revolves further causes a conical ejection in the peripheral wall of the cone as the nozzle rotates. Therefore,
It is possible to spray the cleaning water over a wider area.

Further, not limited to the above-mentioned cleaning water jetting device,
It can also be applied to a fluid jetting device used for another purpose such as a fountain. Further, the fluid is not limited to water.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a configuration that has been conventionally used to drive a nozzle to rotate with cleaning water pressure.

FIG. 2 is a cleaning water jetting device 40 of an embodiment to which the present invention is applied.
It is a schematic perspective view which shows the external appearance of the toilet bowl 30 which has.

FIG. 3 is a schematic exploded perspective view for explaining the configuration of the wash water jetting device 40.

FIG. 4 is a schematic vertical cross-sectional view of the wash water jetting device 40.

FIG. 5 is a schematic horizontal cross-sectional view of the wash water jetting device 40.

FIG. 6 is a schematic vertical sectional view of a cleaning water jetting device 40 of a modified example.

FIG. 7 is a schematic horizontal sectional view of a cleaning water jetting device 40 of this modification.

FIG. 8 is an explanatory view showing an enlarged schematic vertical cross section of a flush water jetting device 40 of another embodiment and its main part.

FIG. 9 is a schematic horizontal cross-sectional view of the cleaning water jetting device 40.

FIG. 10 is an explanatory view showing an enlarged schematic vertical cross section of a cleaning water jetting device 40 of a modified example and its main part.

FIG. 11 is a schematic horizontal cross-sectional view of a cleaning water jetting device 40 of this modification.

FIG. 12 is an explanatory view showing an enlarged schematic vertical cross section of a cleaning water jetting device 40 of another modification and its essential part.

FIG. 13 is a schematic horizontal sectional view of a cleaning water jetting device 40 of this modification.

FIG. 14 is an explanatory diagram for explaining the behavior of the nozzle 4 and the state of the force applied to the nozzle 4 after the washing water has flowed into the chamber 2 with the passage of time.

FIG. 15 is an explanatory diagram illustrating a state of jetting of cleaning water obtained by the nozzle 4 having the behavior shown in FIG.

16A and 16B are explanatory diagrams for explaining the relationship between the revolution and the rotation of the nozzle 4, and FIG. 16A is a diagram illustrating a case where the revolution and the rotation of the nozzle 4 have the same rotation direction; FIG. FIG. 6 is an explanatory diagram showing a case where the revolution of the nozzle 4 and the rotation of the nozzle 4 are opposite to each other.

FIG. 17 is an explanatory diagram for explaining a state of jetting of cleaning water when the nozzle 4 takes the behavior of FIG. 16, and FIG. 17A is a state of jetting cleaning water when the nozzle revolution and the rotation are in the same direction. FIG. 17B is an explanatory diagram for explaining the state of jetting of cleaning water when the nozzle revolution and the rotation are in opposite directions.

FIG. 18 is an explanatory diagram illustrating a first method when the nozzle 4 is in the inclined posture.

FIG. 19 is an explanatory diagram for explaining another aspect when the first method of defining the nozzle tilt posture is adopted.

FIG. 20 is an explanatory diagram illustrating another aspect of the first method.

FIG. 21 is an explanatory diagram illustrating a second method when the nozzle 4 is in the inclined posture.

FIG. 22 is an explanatory diagram illustrating a third method when the nozzle 4 is in the inclined posture.

FIG. 23 is an explanatory diagram illustrating another method of setting the nozzle 4 in an inclined posture.

FIG. 24 is an explanatory diagram illustrating a modified example of this method.

FIG. 25 is an explanatory diagram for explaining a situation in which the nozzle 4 is displaced in the ascending position with the supply of wash water.

FIG. 26 is an enlarged view showing the main part of the modified example of the contact state between the ceiling wall 2D of the chamber 2 and the step end surface 7A of the nozzle 4, and FIG. 26 (a) shows the nozzle stationary state. FIG. 26B is an explanatory diagram showing a nozzle inclined state.

FIG. 27 is an explanatory view illustrating a modified example of the contact state between the ceiling wall 2D of the chamber 2 and the nozzle 4.

FIG. 28 is an explanatory diagram illustrating a shower device 291 to which cleaning water is ejected as the nozzle revolves, and FIG.
FIG. 28B is a cross-sectional view of the shower device 291 in the lateral direction, and FIG. 28B is a cross-sectional view of the shower device 291 in FIG.

FIG. 29 is an explanatory diagram illustrating a state in which cleaning water is discharged from the shower device 291.

FIG. 30 is a schematic perspective view of a portable body part cleaning apparatus for human body 300 to which revolving squirt accompanying nozzle revolution is applied.

FIG. 31 is a schematic perspective view of a dishwashing apparatus 310 to which the revolution spouting of wash water associated with the revolution of the nozzle is applied.

FIG. 32 is an explanatory diagram for explaining a rotary washing arm 320 included in the dishwasher 310.

FIG. 33 is an explanatory diagram illustrating a schematic configuration of a bath cleaning device 350 to which revolution revolving jet of cleaning water accompanying nozzle revolution is applied.

FIG. 34 is an explanatory diagram for explaining how the nozzle 4 is tilted by the guide hole 2B of the chamber 2 used in the bath cleaning apparatus 350.

[Explanation of symbols]

2 ... Chamber 2A ... Ceiling opening 2B ... Guide hole 2C ... bottom hole 2D ... Ceiling wall 2E ... annular ridge 2a ... Peripheral wall part 2b ... Peripheral wall part 4 ... Nozzle 4A ... Large diameter part 4B ... Tip 4D ... bottomed hole 5: Wash water spout 6A ... upper through hole 6B: lower through hole 7 ... Reduced diameter 7A ... Step end face 7C ... Thrust bearing 8 ... Square block 9 ... Top lid 10 ... Lower lid 11 ... Protrusion 12 ... Female screw hole 13 ... Communication hole 15 ... feather 19 ... Channel 19A ... Channel portion 19B ... Flow path part 30 ... Toilet bowl 31 ... Nozzle arm 40 ... Washing water jetting device 41 ... Recess 42 ... Wash water inlet 43 ... Recess 44 ... Lower end 45 ... convex part 50 ... Water supply hose 291 ... Shower device 294 ... Chamber 294a ... Turning guide 295 ... Buffer chamber inflow path 296 ... Waterway 298 ... Buffer room 299 ... Head cover 299A ... Ceiling opening 300 ... Human body local cleaning device 301 ... tank 302 ... Nozzle arm 310 ... dishwasher 320 ... Rotating washing arm 311 ... Door 313 ... Washing room 321 ... Support post 350 ... Bath cleaning device 352 ... bathtub 354 ... Detergent tank 356 ... Pump 358 ... Switching valve 360 ... Control device 362 ... Remote control O ... Nozzle shaft core P ... central axis of opening T1 to T3 ... Abutting point

Front page continuation (72) Inventor Makoto Hatakeyama 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture Totoki Kikai Co., Ltd. 3 Kyoritsu Alloy Manufacturing Co., Ltd. (56) Reference JP 2000-8452 (JP, A) JP 8-246535 (JP, A) JP 2000-282545 (JP, A) JP 7-184820 ( JP, A) Fukukaihei 4-26049 (JP, U) European Patent Application Publication 879644 (EP, A 2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E03D 9/08 A47L 15/20 A61H 35/00 B05B 3/00

Claims (19)

(57) [Claims] 1. A fluid ejection device comprising a chamber for receiving a fluid and ejecting the received fluid from a fluid ejection port, wherein the nozzle is incorporated in the chamber, and the fluid ejection port is provided on the nozzle tip side. The nozzle having the nozzle inner conduit for guiding the fluid received in the chamber to the fluid ejection port, and rotating the reduced diameter portion of the nozzle tip side formed in the nozzle in the opening formed in the chamber. The nozzle is freely movable into a state in which the position of the nozzle can be changed in the axial direction of the nozzle, and the nozzle can revolve around the central axis in a posture inclined with respect to the central axis of the opening. Then, when the fluid is supplied to the chamber, the position of the nozzle is changed toward the outer side of the nozzle tip by the fluid pressure, and the nozzle having a diameter larger than that of the reduced diameter portion is generated. The end surface of the nozzle portion abuts the chamber ceiling wall on the opening side, and in that abutment state, the nozzle rotates around the axis by fluid pressure, and the nozzle rotates around the central axis in a posture inclined with respect to the central axis. It is configured to eject the fluid from the fluid ejection port while revolving in the direction of
In the situation where the position is changed toward
The opening means a space around the opening inside the chamber.
From the fluid jet to the outside of the opening and the jet from the fluid jet
A fluid ejection device that is designed not to interfere with the ejected fluid. 2. The fluid ejection device according to claim 1, further comprising a guide for guiding the nozzle so that the nozzle revolves around the central axis in a posture inclined with respect to the central axis of the opening. A fluid ejection device provided in the chamber. 3. A fluid ejection apparatus according to claim 1 or claim 2 Symbol placement, and the chamber ceiling wall, at least one of the end face of the nozzle portion having a diameter larger than said reduced diameter portion is formed in a spherical A fluid ejection device. 4. A device for ejecting a fluid from a fluid ejection port, comprising: a chamber receiving the supply of the fluid; and a nozzle incorporated in the chamber, the fluid ejection port being provided on the nozzle tip side, A nozzle having a nozzle inner duct for guiding the fluid received in the chamber to the fluid ejection port, wherein the nozzle exposes the fluid ejection port to the outside of a ceiling opening formed in the chamber, and the ceiling opening Side chamber ceiling wall is brought into contact with one place and at least another place to take a posture inclined with respect to the central axis of the ceiling opening, and revolves around the central axis in the inclined posture. When the fluid is supplied to the chamber, the fluid pressure of the supplied fluid revolves around the central axis in the inclined posture, The rewritable ejecting fluid from the fluid ejection opening via the serial in line nozzles, it becomes the inclined posture
Except at one location on the chamber ceiling wall around the ceiling opening
A gap is formed in the chamber, and the fluid inside the chamber is formed at the gap.
A fluid ejecting device characterized by causing passage of a fluid. 5. A fluid ejection apparatus according to claim 4 Symbol mounting, the nozzle, the other abutting one place raised in contact with the chamber sidewalls surrounding the nozzle, and the chamber side wall contact portion A fluid ejection device that adopts the inclined posture at two points of contact with the chamber ceiling wall. 6. A fluid ejection apparatus according to claim 5 Symbol mounting, the nozzle includes a nozzle tip from the ceiling opening has a smaller diameter, and the nozzle body subsequent to said nozzle tip is larger in diameter than the ceiling opening The nozzle tip is projected to the outside from the ceiling opening to expose the fluid ejection port to the outside of the ceiling opening, and the step portion between the nozzle tip and the nozzle body is brought into contact with the chamber ceiling wall. A fluid ejection device, wherein the nozzle main body is brought into contact with the side wall of the chamber to take the inclined posture. 7. A fluid ejection apparatus according to claim 4 Symbol mounting, the nozzle includes a nozzle tip from the ceiling opening has a smaller diameter, and the nozzle body subsequent to said nozzle tip is larger in diameter than the ceiling opening And has the nozzle tip projecting from the ceiling opening to the outside to expose the fluid ejection port to the outside of the ceiling opening, and abutting the other one position with an opening wall of the ceiling opening. The nozzle tip is brought into contact with the ceiling opening wall and the nozzle tip is brought into contact with the nozzle tip and the nozzle body. A fluid ejecting device in which the stepped portion of is contacted with the chamber ceiling wall. 8. A fluid ejection apparatus according to claim 7 Symbol mounting, the nozzle, in addition to the abutment of the abutment and the chamber ceiling wall to the ceiling opening wall, the nozzle body to the chamber side wall A fluid ejecting device that is brought into contact with the fluid ejection device to assume the inclined posture. 9. A fluid ejection device according to any claim 4 of stone claim 8 have shifted, the nozzle receives a fluid pressure associated with the fluid supply to the chamber, and moved to the ceiling opening side A fluid ejecting device that causes contact with the chamber ceiling wall. 10. A fluid ejection apparatus according to any claim 4 of stone claim 9 had shifted, the chamber ceiling wall, a contact portion between the nozzle and is raised annular, fluid ejection device. 11. A fluid ejection apparatus according to any claim 4 for stone 10. There deviation, the nozzle, the contact area between the chamber ceiling wall,
A fluid ejection device having a spherical shape or a tapered shape. 12. A fluid ejection apparatus according to any claim 4 of stone claim 11 have shifted, the nozzle has to penetrate the nozzle pipe to the nozzle axis direction, the fluid ejection device. 13. A fluid ejection apparatus according to claim 12 Symbol mounting, the nozzle is the nozzle pipe and the fluid ejection opening opposite the large diameter of the pipe, the fluid ejection device. 14. A fluid ejection apparatus according to any claim 4 of stone claim 13 have shifted, and the chamber ceiling wall, at least one of the contact portion of the nozzle to the chamber ceiling wall is a metallic material A fluid ejection device formed of. The 15. Water has been cleaned water a human private part washing device for jetting water toward the human private, a nozzle arm positioned in the cleaning position during a local washing, as set forth in any claims 1 to 14 have deviated A human body local area cleaning apparatus comprising: the fluid jetting apparatus, wherein the fluid jetting apparatus is incorporated in the nozzle arm so as to spout washing water from the nozzle toward the human body local area. 16. A water supply has been cleaned water to a shower device for jetting water toward the human body, the fluid discharge device according to one claims 1 to 14 have shifted, washing water from the nozzle toward the human body Shower device built into the shower head to discharge water. 17. A water supply has been cleaned water to a cleaning device for water discharge toward a cleaning article has the fluid discharge device according to one claims 1 to 14 have shifted, the object from the nozzle A cleaning device that discharges cleaning water toward a cleaning article. 18. A cleaning apparatus according to claim 17 Symbol mounting, with the fluid ejection device, the nozzle is in the toward the in the cleaning chamber to be cleaned article is housed, the cleaning apparatus. 19. A cleaning apparatus according to claim 18 Symbol mounting, the disposed in the cleaning chamber, a rotary arm which is rotatable about an axis of rotation, said rotary arm, the rotary on the arm end The fluid jetting device is arranged with the shaft sandwiched, and the chamber of each of the fluid jetting devices has a water supply passage for supplying washing water. Each of the fluid jetting devices is generated by jetting of washing water. A cleaning device that directs the cleaning water from the nozzle in an oblique direction with respect to the rotating arm so that the reaction force causes the rotating arm to rotate in the same direction about the rotation axis.