JPH076004U - Injection nozzle - Google Patents

Abstract

(57) [Abstract] [Purpose] To select the jet port and jet mode for fluids with different pressures, and also to reduce the size. [Structure] A high-pressure fluid and a low-pressure fluid are selectively introduced into a nozzle body 15 from a single through hole 19, and the high-pressure fluid and the low-pressure fluid are injected into the nozzle hole 1
It is possible to squirt from 8. Through hole 1 in nozzle body 15
An inner nozzle 31 having a nozzle chamber inner 32 communicating with the nozzle chamber 9 and an injection port 34 having a smaller diameter than the ejection hole 18 is selectively moved in the axial direction. The shaft end of the inner nozzle 31 is engaged with and disengaged from the inner opening edge of the ejection hole 18 to open and close the ejection hole 18. The current supply of the introduced fluid is stopped when the fluid is switched.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is suitable for, for example, a car wash nozzle, and relates to an injection nozzle capable of selecting a fluid ejection port and an ejection mode of a fluid having different pressures and further miniaturizing the ejection port.

[0002]

[Prior art]

 For example, large-sized car wash machines recently equipped with water and air injection nozzles, respectively, wash the car with water or warm water, and then blow air to remove the water adhering to the car body and even dry it. .

However, in a small car wash machine having only one injection nozzle, water or warm water is mainly sprayed, and air is not sprayed. In this case, even if air is supplied to the nozzle, there is a problem in that the nozzle for injecting water having a pressure higher than the air pressure has a small diameter and a small amount of air injection, resulting in poor drainage effect.

As a means for solving such a problem, for example, in Japanese Utility Model Laid-Open No. 63-89379, a single nozzle is provided at the tip of a nozzle communicating with a water supply source and an air pressure source, and the base of the nozzle is provided. A changeover switch is provided at the end so that water or air can be selectively ejected from the ejection port through the switching operation of the switch.

[0005]

[Problems to be solved by the device]

 However, since this conventional device shares the water and air jets, there was a problem that the amount of air jetted from the jets was too small, as described above, and it could not be used for actual use.

The present invention solves such a problem, and provides a practical injection nozzle in which the injection port and the ejection mode can be selected according to the fluid having different pressures and the size can be reduced. The purpose is to do.

[0007]

[Means for Solving the Problems]

 Therefore, in the injection nozzle of the present invention, the high pressure fluid and the low pressure fluid are selectively introduced into the nozzle body from a single through hole, and the high pressure fluid and the low pressure fluid can be ejected from the ejection hole inside the nozzle body. , An inner nozzle having a nozzle chamber inner communicating with the through hole and an injection port having a diameter smaller than that of the ejection hole is selectively moved in the axial direction, and the shaft end of the nozzle is moved toward the inner opening edge of the ejection hole. The jet hole can be opened and closed by opening and closing the jet port, and the current supply of the introduced fluid can be stopped at the time of switching the fluid to select the jet port and jet mode of the fluid with different pressures. It is characterized by being designed so that it can withstand actual use.

[0008]

[Work]

 It is possible to select the opening / closing of the discharge hole according to the fluid, and select the jet port and jet mode. Therefore, compared to the one in which the ejection port and the ejection mode are uniformly set according to the fluid pressure, various ejection modes can be obtained, and for example, by intentionally ejecting the high-pressure fluid from the large-diameter ejection port, A discharge mode different from that of injection can be obtained. At the time of switching the fluid, the current supply of the introduced fluid is stopped, the fluid pressure acting on the inner nozzle is reduced, the driving force of the inner nozzle is reduced, and the driving unit can be downsized. In particular, this effect suppresses the increase in size of the solenoid when the solenoid is used for the drive part of the inner nozzle, and can reduce the size and cost of this type of device.

[0009]

【Example】

 1 to 3, reference numeral 1 denotes a box-shaped car wash main body having an air supply pipe 2 communicating with an air supply source such as an air compressor. And a water supply pipe 3 that communicates with a water supply source such as water supply.

The air supply pipe 2 is connected to a switching valve 4 such as a solenoid valve which is interlocked with a later-described switching switch, and the water supply pipe 3 is connected to a heating device 5 such as an electric heater or a boiler which is interlocked with the above-mentioned switching switch. The pressurizing pump 6 is connected to a switching valve 7 such as a solenoid valve, and the air supply pipe 2 is connected to the downstream side of the switching valve 7.

Both ends of a bypass pipe 8 are connected to the front and rear of the heating device 5, and a switching valve 9 such as a solenoid valve which is linked to a switching switch described later is connected to the pipe 8.

On the outside of the car wash main body 1, for example, one flexible conduit 10 communicating with the downstream side of the water supply pipe 3 is piped, and a handle holder 12 is connected to the tip of the pipe 10 to connect the holder 10 to the holder. A nozzle handle 11 made of a metal tube is connected to the nozzle 12.

At the base end of the nozzle handle 11, that is, at the hand side, a handle holder 12 having the above-described changeover switch is provided, and the changeover switch is provided with a plurality of selection fluids such as water, hot water, and air. An operation button (not shown) is provided, and one of the buttons is turned on to activate the corresponding switching valves 4, 7, 9 and the heating device 5 and the pressurizing pump 6.

An injection nozzle 13 is connected to the tip of the nozzle handle 11, and the nozzle 13 is formed into an elongated cylindrical body, which is a hollow cylindrical nozzle body 15 having a nozzle chamber 14 inside, and It has a nozzle cover 16 attached to one side of the body 15.

A tapered seat surface 17 is formed at the bottom of the nozzle chamber 14, an ejection hole 18 is opened in the center of the surface 17, and a through hole 19 is formed in the inner surface of the nozzle chamber 14. The tip of the nozzle handle 11 is connected to the outer peripheral edge of the opening of the hole 19.

On the opening side of the nozzle chamber 14, a shaft cylinder portion 20 integral with the nozzle cover 16 is fitted in an airtight manner, and the shaft cylinder portion 20 has a hollow cylinder shape, and a guide hole is formed therein. 21 and a bean chamber 22 are formed.

A plunger 23 is slidably and airtightly fitted in the guide hole 21, and a plunger rod 24 of the plunger 23 penetrates a sliding hole 25 formed in the nozzle cover 16 to project outward, and its shaft end A switching lever 27 is connected to the portion via a pin 26 so as to be able to move up and down.

A cam 28 having a substantially elliptical contour curve is provided at the tip of the switching lever 27, and the peripheral surface, which is the contour curve of the cam 28, is engaged with the upper surface of the nozzle cover 16. . A pair of engagement tops 28a, 28a are formed at flat angles on the peripheral surface, and an engagement top 28b is formed in the center between them.

The periphery of the engaging tops 28a, 28b is formed in a planar shape so as to stabilize their positions. The cam lifts h1, h2 from the respective tops 28a, 28b to the pins 26 are h1> It is set to h2. Then, when the engagement top portion 28a and the nozzle cover 16 are engaged, a high pressure fluid can be ejected, and when the engagement top portion 28b and the nozzle cover 16 are engaged, a low pressure fluid can be ejected. In this way, the high-pressure fluid is also able to be injected by lowering the pressure.

A spring 29 is inserted between the upper surface of the spring chamber 22 and the end surface of the plunger 23, and urges the plunger 23 inward through its elasticity.

A screw shaft 30 is projectingly provided on an end surface of the plunger 23, and a base portion of an inner nozzle 31 is screwed to the shaft 30. The inner nozzle 31 is formed in a hollow cylindrical shape, its outer diameter is the same as that of the plunger 23, and is larger than the diameter of the ejection hole 18, and a nozzle chamber inner 32 is formed therein. .

A through hole 33 communicating with the nozzle chamber 14 and the nozzle chamber inner 32 is formed on the peripheral surface of the inner nozzle 31 on the base side, and a nozzle hole 34 having a diameter smaller than that of the nozzle hole 18 is formed at the tip thereof. A seat 35 having a tapered surface is formed on the outer peripheral surface of the seat 35, which is engageable with the seat surface 17.

In addition, reference numeral 36 in the drawing denotes traveling wheels provided on the lower portion of the car wash machine body 1, and 37 and 38 are O-rings mounted on the peripheral surfaces of the shaft tubular portion 20 and the plunger 23.

4 to 11 show another embodiment of the present invention, in which the same reference numerals are used for the portions corresponding to the above-mentioned configuration. Among them, in the embodiment shown in FIGS. 4 and 5, a solenoid 39 and a cap 40 for protecting the solenoid 39 are provided on the upper surface of the nozzle cover 16 instead of the switching lever 27, and the inside of the cap 40 is provided. The stopper 41, which can contact the end of the plunger rod 24, is fixed, while the selector switch 42 for the solenoid 39 is provided on the handle holder 12.

That is, in this embodiment, the plunger rod 24 is attracted to or separated from the stopper 41 side by the electromagnetic force of the solenoid 39, and the ejection portion and the ejection mode are switched by the ejection hole 18 or the ejection port 34. The feature is that it can be easily performed on the hand side of the nozzle handle 11.

It should be noted that the plunger rod 24 needs to be pulled up when switching from the injection mode of the high-pressure fluid such as the cleaning liquid as shown in FIG. 4 to the injection of the low-pressure fluid such as air, but the inner nozzle 31 connected to the rod 24 is When the plunger rod 24 is pulled up against this, it is strongly urged downward due to the pressure of the high-pressure fluid in the nozzle chamber inner 32 and the elasticity of the spring 29. This requires the solenoid 39 to be large in size and large in capacity, which promotes the increase in size and weight of this type of device.

Therefore, for example, when the injection of the high-pressure fluid is temporarily stopped at the time of the above switching, that is, the pressure inside the nozzle chamber inner 32 is reduced, a large electromagnetic force is not required to pull up the plunger rod 24, and the solenoid is not pulled up. It is possible to prevent the increase in size of the device due to the increase in size of 39. Such an operation is also effective when stopping the air injection, and does not require a strong spring 29 to pull down the plunger rod 24. Therefore, the pulling force of the plunger rod 24 can be reduced, so that the above-described effect is enhanced. .

Further, in the embodiment shown in FIGS. 6 to 10, the nozzle body 15 is rotated instead of the operation lever 27 so that the injection port can be switched to simplify the operation, and the shaft end portion of the nozzle body 15 can be realized. It is characterized in that the nozzle handle 11 is connected to the above, the through hole 19 is omitted, and the processing cost is reduced and the appearance of the nozzle 13 is improved.

That is, the plunger 23 is slidably fitted to the inner surface of the nozzle body 15, and these are relatively rotatably fitted, and the end portion of the nozzle body 15 has a dish-shaped ring cover. 42 is fixed, and a through hole 43 is formed in the cover 42. The small diameter shaft portion 24a of the plunger rod 24 slidably penetrates through the through hole 43, and the nozzle handle 11 is connected to the tip end portion of the shaft portion 24a.

A pair of cutout grooves 44 are formed at the opening edge of the through hole 43, and a pair of protrusions 45 engageable with the cutout groove 44 are provided at one end of the plunger rod 24. The inner surface of the ring cover 42 is rotatably arranged immediately above the protrusions 45, 45.

A through hole 46 having the same function as the through hole 19 and communicating with the nozzle chamber inner 32 is formed inside the plunger 23 and the plunger rod 24. In addition, the inner nozzle 31 and a nozzle 47 which is a separate body are detachably attached. The end of the inner nozzle 31 is arranged inside the ejection hole 18, and an annular passage 48 is formed between them.

In the figure, 49 is a retaining ring attached to the inner surface of the nozzle body 15, 50 is a washer, 51 is a passage formed between the inner surface of the nozzle chamber 14 and the peripheral surface of the inner nozzle 31, and is a guide hole which also serves as a spring chamber. It communicates with 21.

In the case of injecting air, which is a low-pressure fluid, in such an embodiment, the nozzle body 15 is held, and the nozzle body 15 is pivotally operated about the axis so that the notch groove 44 and the protrusion 45 are formed as shown in FIGS. It is positioned so that it cannot be engaged.

In this way, the through hole 46 communicates with the injection port 34 through the nozzle chamber inner 32, the seat surface 17 and the seat 35 are separated from each other as shown, and the nozzle chamber 14 has the annular passage 48. And the nozzle chamber 14 communicates with the nozzle chamber inner 32 through the through hole 33.

Therefore, when air is sent from the nozzle handle 11 under such a condition, the air is guided to the nozzle chamber inner 32 from the through hole 46, jetted from the jet port 34, and a part of the air passes through. The flow is branched from the hole 33 to the nozzle chamber 14, guided to the annular passage 48, and ejected annularly from the ejection hole 18.

As described above, in the above case, air is ejected from both the ejection port 34 and the annular passage 48, and a large ejection port area can be obtained, so that a large amount of air can be ejected. In this case, a part of the air in the nozzle chamber 14 is guided to the passage 51 and acts on the end surface of the plunger 23 under pressure to try to push it up, but the upper surface of the protrusion 45 engages with the inner surface of the ring cover 42. In addition, since the plunger 23 or the inner nozzle 31 is prevented from moving upward, the current injection state is maintained.

On the other hand, when switching from air injection to injection of hot water, which is a high-pressure fluid, the nozzle body 15 is held, and this is rotated around the axis to align the cutout groove 44 with the position of the protrusion 45. These are positioned so that they can be engaged.

When hot water is fed from the nozzle handle 11 under such a circumstance, the hot water is guided from the through hole 46 to the inner nozzle chamber 32 and jetted from the nozzle 34, and a part of the hot water passes through the hole. The flow is split from 33 to the nozzle chamber 14 and guided to the passage 51, where pressure acts on the end face of the plunger 23.

Therefore, the plunger 23 is pushed up against the elasticity of the spring 29, the protrusion 45 engages with the notch groove 44, and the inner nozzle 31 connected to the plunger 23 moves together with it. When the seat surface 35 is engaged with the seat 17, the upward movement is stopped.

This situation is as shown in FIG. 10, in which the nozzle chamber 14 and the ejection hole 18 are blocked, the ejection of hot water from the hole 18 is cut off, and the ejection of the hot water only occurs from the ejection port 34. Therefore, in this case, hot water can be intensively jetted.

The embodiment shown in FIG. 11 belongs to an application example of the above-mentioned embodiment, and instead of rotating the nozzle body 15 as described above, the rotary handle 52 attached to the tip of the small diameter shaft portion 24a is operated to project the protrusion. The nozzle 45 is engaged with and disengaged from a notch groove (not shown) to facilitate the turning operation, and the nozzle handle 11 is connected to the peripheral surface of the nozzle body 15. Are substantially the same.

The injection nozzle configured as described above is connected to the tip of the nozzle handle 11, and the other end of the handle 11 is connected to a single conduit 10. The pipe 10 has water or hot water, air, and In addition to the above, detergent liquid and liquid wax can be supplied.

Therefore, the weight applied to the nozzle handle 11 is reduced as compared with the case where the conduits are drawn out from each of these jetted fluids and the other ends thereof are connected to the nozzle handle 11, and the load required for operating the handle 11 is reduced. This can be done easily and lightly, and the cost of the conduit 10 can be significantly reduced.

Further, in the injection nozzle of the present invention, since a single nozzle 13 can select two different injection port diameters and injection port areas as will be described later, it is possible to obtain an injection mode according to the ejected fluid, The number of parts of the nozzle can be halved compared to the one with one nozzle and one nozzle.

For convenience of handling, the switching nozzle 27 of the injection nozzle attached to the nozzle handle 11 is always turned over as shown in FIG. 2, and the engaging top portion 28 a is engaged with the upper surface of the nozzle cover 16 as shown in FIG. The cam lift h1 is formed. Therefore, the plunger rod 24 and the plunger 23 integral with the plunger rod 24 are pushed down to the lowest position, and the inner nozzle 31 connected to the lower end of the plunger rod 24 is pushed down in the same manner to push the seat 35 against the seat surface 17 and the seat 35. The elasticity of the spring 29 acts on the surface 17 to strongly seal the surface 17.

When actually washing the vehicle under such a condition, the changeover switch of the handle holder 12 mounted on the hand side of the nozzle handle 11 is operated to turn on the operation button of water or hot water.

With this configuration, for example, when the hot water button is turned on, the signal is sent to the heating device 5, the pressurizing pump 6 and the switching valve 7, and these are operated to cause the heating device 5 to wash water. Is heated to a predetermined temperature, and the pressurizing pump 6 pressurizes it to a predetermined pressure, which is about 80 kg / cm @ 2 in the embodiment, and sends it from the switching valve 7 after opening to the conduit 10.

The hot water is guided to the conduit 10 and moves to the nozzle handle 11, and flows into the through hole 19 of the injection nozzle 13 from the front end of the handle 11. The hot water is guided from the through hole 19 to the nozzle chamber 14, and also through the through hole 33 facing the through hole 19 to the nozzle chamber inner 32, and the hot water of the inner 32 is jetted out from the jet port 34 to the outside. It is sprayed on the car body.

In this case, since the injection port 34 has a very small diameter as compared with the ejection hole 18 described later, the hot water is ejected intensively and vigorously. Therefore, even if the nozzle 13 of the present invention is slightly heavier than the conventional car wash nozzle, the reaction force at the time of the fountain does not burden the operation of the nozzle handle 11.

When the water adhering to the vehicle body is removed after washing the car, the switching switch of the handle holder 12 is operated to turn off the hot water button. By doing so, the heating device 5 and the pressurizing pump 6 stop driving, the switching valve 7 closes, and the supply of hot water to the injection nozzle 13 is stopped.

Therefore, when the hot water in the nozzle chamber inner 32 is ejected to the outside, the pressure of the inner 32 drops, and the pressing force of the inner nozzle 31 against the seat surface 17 is weakened, the switching lever 27 is operated. Then, this is rotated 90 ° counterclockwise in FIG. 2 about the pin 26.

In this way, the peripheral surface of the cam 28 slides on the upper surface of the nozzle cover 16, the engaging top portion 28 a is separated from the upper surface of the nozzle cover 16, and instead, the engaging top portion 28 b having a large cam lift is attached to the nozzle cover 16. By engaging the upper surface, the plunger rod 24 is pulled up against the elasticity of the spring 29 by the difference between the cam lifts, that is, h2-h1. In this case, since the pressing force of the inner nozzle 31 is weakened as described above, the turning operation force of the switching lever 27 is reduced accordingly.

FIG. 3 shows the situation after the switching operation of the switching lever 27. In this case, the inner nozzle 31 moves together with the plunger rod 24, and the seat 35 moves away from the seat surface 17 as shown in FIG. The chamber 14 and the air ejection hole 18 communicate with each other. Therefore, the cleaning liquid remaining in the nozzle chamber 14 flows out from the ejection holes 18.

Under such circumstances, the changeover switch of the handle holder 12 is operated to turn on the air button. As described above, according to the present invention, since the ON / OFF operation can be performed with the change-over switch at hand, there is no tediousness of having to go to the corresponding equipment position at the time of the above operation and interrupting the work.

On the other hand, the air compressor is driven by the above operation, and the switching valve 4 is opened, so that compressed air of a predetermined pressure, in the embodiment, about 8 kg / cm 2 of air is sent out from the switching valve 4 to the conduit 10. Be done.

The air is guided to the conduit 10 and moves to the nozzle handle 11. The air is guided from the tip of the handle 11 to the through hole 19 of the injection nozzle 13, moves from the through hole 19 to the nozzle chamber 14, and The nozzle 31 slides between the sheet 35 and the sheet surface 17 and moves to the ejection hole 18. Further, a part of the air is guided from the through hole 33 to the inner nozzle chamber 32 and is ejected from the ejection port 34. This air merges with the air and is ejected from the ejection hole 18 to the outside to be blown to the vehicle body.

As described above, in the present invention, the desired nozzle can be switched according to the ejected fluid, and in the case of low-pressure air, the nozzle area can be set larger than that of high-pressure washing water, so a large amount of air can be discharged. Can be sprayed onto the car body to drain water efficiently.

Moreover, at that time, since the air is guided to the nozzle chamber 14 and the nozzle chamber inner 32, the residual liquid in the relevant portion can be removed. In particular, this effect can prevent a situation in which, for example, after the detergent liquid or wax is sprayed, they remain at the injection port 34 and solidify to cause clogging.

In the above-described embodiment, the cleaning liquid or the detergent liquid is ejected from the ejection port 34 having a small ejection port diameter, but this is intentionally made to have a large ejection port diameter by operating the switching lever 27, for example. When jetted from the jet holes 18, the jet pressure is lowered and the cleaning liquid or the like can be set from the jet mode to the so-called watering mode. On the other hand, on the contrary, by ejecting air from the ejection port 34 having a small ejection port diameter, high-pressure air can be concentrated and ejected, and in combination with the above, various car washing modes can be obtained.

[0060]

[Effect of device]

 As described above, in the injection nozzle of the present invention, an inner nozzle having an inner nozzle chamber communicating with the through hole and an injection port having a diameter smaller than the ejection hole is selectively moved in the axial direction inside the nozzle body. Since the nozzle end is engaged and disengaged with the inner opening edge of the ejection hole to open and close the ejection hole, the opening and closing of the ejection hole can be selected according to the fluid, and the ejection port and ejection mode can be selected. You can Therefore, a variety of ejection modes can be obtained as compared with the one in which the ejection port and the ejection mode are uniformly set according to the fluid pressure.For example, by intentionally ejecting a high-pressure fluid from a large-diameter ejection port, A discharge mode different from that of injection can be obtained. Further, in the present invention, since the current supply of the introduced fluid is stopped at the time of switching the fluid, the fluid pressure acting on the inner nozzle is reduced, the driving force of the inner nozzle is reduced, and the driving unit can be downsized. You can In particular, this effect has a practical effect in that when a solenoid is used in the drive part of the inner nozzle, the size of the solenoid is prevented from increasing, the size of this type of device is reduced, and the cost is reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example in which the present invention is applied to a car wash nozzle.

FIG. 2 is a cross-sectional view showing an embodiment of the present invention, showing a situation when a high-pressure fluid is jetted.

FIG. 3 is a cross-sectional view showing a situation when the low-pressure fluid of the present invention is jetted.

FIG. 4 is a cross-sectional view showing a main part of another embodiment of the present invention, showing a situation when a high-pressure fluid is ejected.

FIG. 5 is a front view showing the outer appearance of the other embodiment.

FIG. 6 is a cross-sectional view showing another embodiment of the present invention, showing a situation when a low pressure fluid is injected.

FIG. 7 is a perspective view showing an example of a protrusion in the another embodiment.

8 is a sectional view taken along the line AA of FIG.

FIG. 9 is a front view showing the outer appearance of the another embodiment.

FIG. 10 is a cross-sectional view showing a situation at the time of jetting a high-pressure fluid in the another embodiment.

FIG. 11 is a sectional view showing still another embodiment of the present invention, showing a situation at the time of injecting a low pressure fluid.

[Explanation of symbols]

 13 injection nozzle 15 nozzle body 18 ejection hole 19 through hole 31 inner nozzle 32 nozzle chamber inner 34 ejection port

Claims (1)

[Scope of utility model registration request] 1. An injection nozzle in which a high-pressure fluid and a low-pressure fluid are selectively introduced into a nozzle body through a single through hole, and the high pressure fluid and the low pressure fluid can be ejected from the ejection hole, and the inside of the nozzle body is communicated with the through hole. An inner nozzle having an inner nozzle chamber and an ejection port having a diameter smaller than that of the ejection port is selectively moved in the axial direction, and an axial end portion of the nozzle is engaged with and disengaged from an inner opening edge portion of the ejection port. The injection nozzle is characterized in that the current supply of the introduced fluid is stopped when the fluid is switched.