JPH10286494A - Fluid ejection nozzle and fluid ejection gun - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a fluid ejection nozzle and a fluid ejection gun that can reduce a burden on an operator even when used for cleaning work or the like and can obtain a larger ejection output. SOLUTION: A fluid having a tubular shape is made to pass through the inner peripheral side and is ejected, and a flat portion 16 having flexibility is formed, so that a turbulent flow generated in the fluid passing inside is formed. Due to the influence and the force at the time of ejection of the fluid, the flat portion 16 is caused to reciprocate at the ejection tip side while being curved in the flat direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid ejection nozzle and a fluid ejection gun used for ejecting a gas, a liquid, or a mixture of a gas and a liquid.

[0002]

2. Description of the Related Art A fluid ejection gun is used to eject a fluid such as a gas, a liquid, or a mixture of a gas and a liquid. Such a fluid ejection gun communicates with a fluid supply source, and also includes a gripper, a nozzle capable of ejecting fluid supplied from the fluid supply source, and communication between the fluid supply source and the nozzle.
And a switching means for switching the cutoff. Conventionally, a nozzle having no flexibility is used.

[0003]

By the way, in the above-mentioned conventional fluid ejecting gun, when it is used for a cleaning operation for removing dust by ejecting air, for example, the gun is swung while reciprocating an air collision position. However, if the cleaning range is wide, there is a problem in that a burden is imposed on an operator in shaking the gun. In addition, the ejection power of the fluid is determined by the capacity and flow path shape of the fluid supply source,
There is a problem that it is not possible to cope with a case where a larger ejection power is desired.

Accordingly, an object of the present invention is to provide a fluid ejection nozzle and a fluid ejection gun which can reduce the burden on an operator even when used for a cleaning operation or the like and can obtain a larger ejection power. That is.

[0005]

In order to achieve the above object, a fluid ejection nozzle according to the present invention has a tubular shape and allows fluid to pass through an inner peripheral side to eject the fluid. It is characterized in that a part is formed. As a result, due to the effect of turbulence generated in the fluid passing through the inside and the force at the time of ejection of the fluid, the flat portion is caused to reciprocate on the ejection tip side while being curved in the flat direction.

A fluid ejection gun according to the present invention is connected to a fluid supply source and has a gripper, a nozzle capable of ejecting a fluid supplied from the fluid supply source, and a communication between the fluid supply source and the nozzle. Switching means for switching the cutoff, wherein the nozzle is formed in a tubular shape and allows the fluid to pass through the inner peripheral side, and a flat portion having flexibility is formed. I have. This causes the nozzle to reciprocate at the ejection tip side while bending the flat portion in the flattening direction by the influence of turbulence generated in the fluid passing through the nozzle and the force at the time of ejection of the fluid.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a fluid ejection nozzle (hereinafter, referred to as a nozzle) 11 of this embodiment.
The nozzle 11 has a through hole 1 penetrating along the length direction.
2, a nozzle body 13 having a cylindrical shape,
And a weight portion 14 provided on one end side of the main body. The nozzle body 13 is integrally formed of a flexible material such as nylon, Teflon, polyurethane, or polypropylene to have a substantially constant thickness, and has a width in one direction perpendicular to the length direction within an intermediate predetermined range. Is formed with a flat portion 16 having a so-called flat shape that is smaller than the width in the direction perpendicular to the length direction and in the direction perpendicular to the one direction, and both sides of the flat portion 16, that is, the nozzle body 1.
3 are provided in predetermined ranges at both ends, respectively.
7, 18 are formed. The flat portion 16 has a flat shape even when the nozzle body 13 is linear along the length direction.

The weight portion 14 is formed in a substantially cylindrical shape with a through hole 20 formed in the center along the axial direction, and a screw portion 22 is formed in the outer peripheral portion over the entire length. A screw member 21 to be screwed in and a cylindrical fitting member 23 for fitting the cylindrical portion 17 on one side inside are formed. The screw member 21 is made of a metal material, and the fitting member 23 is made of silicon. And the like. The screw member 21 is screwed into a female screw portion 24 formed in advance on the inner peripheral side of the cylindrical portion 17, and the screwing prevents the screw member 21 from coming off from the nozzle body 13. In addition, without forming the female screw part 24 on the inner peripheral side of the cylindrical part 17,
The fixing may be performed simply by a force generated by deformation of the cylindrical portion when the screw member 21 is screwed into the cylindrical portion 17. The inner diameter of the fitting member 23 is smaller than the outer diameter of the cylindrical portion 17 to which the screw member 21 is screwed, so that the force generated by the deformation caused by fitting the cylindrical portion 17 inside the cylindrical member 17. This prevents the cylinder 17 from coming off.
Here, the fitting member 23 is configured to fit the cylindrical portion 17 so as to form a portion that is not fitted to one end thereof, so that the fitting member 23 does not cover the through hole 20 of the screw member 21. The elasticity is such that the distal end side of the cylindrical portion 17 is covered.

FIG. 2 shows a fluid ejection gun (hereinafter referred to as a gun) 26 to which the nozzle 11 is attached.
It has a grip portion 27 gripped by an operator, and a lever (switching means) 28 that is swingably provided substantially parallel to the grip portion 27, and moves the lever 28 forward (toward the fingertip). The operator is gripped by the gripping section 27 in the state where it is arranged. Further, the gun 26 is provided with the gripper 2.
A guide portion 30 extending linearly in the opposite direction from the lever 7 to the lever 28, a curved portion 31 curved in a semicircular shape from the opposite side to the grip portion 27 of the guide portion 30, and a guide for the curved portion 31 An extending portion 32 that extends linearly forward from the opposite side of the portion 30 so as to be parallel to the guide portion 30;
The guide portion 30, the bending portion 31, and the extension portion 32 are formed by bending one cylindrical tube 33. An attachment portion 34 is provided at the tip of the extension portion 32, and the nozzle 11 is fitted to the attachment portion 34 in a state where the cylindrical portion 18 on the opposite side to the weight portion 14 is fitted.
2 so as to form a straight line. The nozzle 11 is attached, for example, so that the flat portion 16 has a horizontal direction (thin direction) in a state where the grip portion 27 extends vertically, and rotation is restricted in the mounted state. ing.

The gun 26 is provided with a guide 30
Is connected to a fluid supply source (not shown) via a piping (not shown) attached to a detachable portion 35 provided on the opposite side to the lever 28. By swinging the lever 28 toward the grip portion 27, The fluid supplied from the fluid supply source is supplied to the gripper 2
7, guide part 30, bending part 31, extension part 32, mounting part 34
And the nozzle 1 through the interior of each of the nozzles 11
1 is ejected from the tip portion on the side of the weight portion 14.
The lever 28 is urged by a spring or the like in a direction opposite to the grip portion 27, and is released in the opposite direction with respect to the grip portion 27 by the urging force of the spring by releasing the swing to the grip portion 27 side. By oscillating, the ejection from the tip of the nozzle 11 is stopped, and in this way, the communication / cutoff between the fluid supply source and the nozzle 11 is switched.

The gun 26 is additionally provided with a guide 37 that can slide along the length of the nozzle 11. The guide 37 includes a support portion 38 that is detachably and slidably supported on the guide portion 30 and can be fixed to the guide portion 30 at an arbitrary position, and a base 39 fixed to the support portion 38. And a guide body 40 fixed to the base 39 so as to cover the outside of the flat portion 16 of the nozzle 11. The support portion 38 has a holding member 42 made of a spring material for holding the guide portion 30 and a pair of operating pieces 43 provided on both sides of the holding member 42. When the gripping members 42 are gripped from both sides in the direction of approaching each other, the gripping member 42 releases the gripping of the guide portion 30, and thereby can move along the guide portion 30. When the holding member 42 is moved to an appropriate position to release the holding of the holding member 42, the holding member 4 is released.
2 is fixed to the guide portion 30 by sandwiching the guide portion 30. The guide body 40 has a cylindrical shape, and the nozzle 11 is inserted along the axial direction of the guide body 40 while providing a gap between the guide body 40 and the nozzle 11 so as to cover the outside of the nozzle 11. Has become. The position of the guide main body 40 with respect to the nozzle 11 is changed by moving the support portion 38 along the guide portion 30 as described above.

By adopting the above configuration,
When the lever 28 is swung in the direction of the grip portion 27 and the fluid supplied from the fluid supply source is ejected from the tip of the nozzle 11 through the inner peripheral side of the nozzle 11, the cylindrical portion 17 The turbulence of the fluid is generated inside due to the change in the cross-sectional shape of the flat portion 16 and the flat portion 16 and the pulsation of the fluid. Thus, the flat portion 16 of the nozzle 11 bends in the flat direction and reciprocates along the flat direction on the ejection tip side. Therefore, since the tip side of the nozzle 11 reciprocates automatically, it is not necessary to shake it even when performing a cleaning operation or the like, and the burden on the operator can be reduced. In addition, since the flat portion 16 of the nozzle 11 has extremely low rigidity in the flat direction, the flat portion 16 is curved in the flat direction, and thus the reciprocating direction on the ejection tip side can be made constant. In addition, since the high-speed reciprocating motion of the nozzle 11 amplifies the pressure wave of the fluid, it becomes an intense shock wave and is generated in a band shape, so that a larger ejection power can be obtained.

Further, a weight part 1 is provided at the ejection tip side of the nozzle 11.
Since the nozzle 4 is provided, the ejection tip side of the nozzle 11 can be reciprocated with a larger amplitude. Further, since the hollow screw member 21 that is screwed into the inner periphery of the nozzle 11 on the ejection front end side is used as the weight portion 14, the attachment is simplified. In addition, a guide 37 slidable along the length direction of the nozzle 11 is provided outside the flat portion 16, and the guide 37 is brought into contact with both sides of the flat portion 16 in the moving direction, so that the nozzle 11 The movement range, that is, the amplitude, of the reciprocating movement is regulated. If the guide 37 is moved to the ejection tip side of the nozzle 11, the length from the guide 37 to the ejection tip of the nozzle 11 is reduced, so that the amplitude of the reciprocating motion is reduced, and the guide 37 is moved to the ejection tip of the nozzle 11. If it is separated from the side, the length from the guide 37 of the nozzle 11 to the ejection tip becomes longer, and the amplitude of the reciprocating motion increases. In this way, the nozzle 11
The amplitude of the reciprocating motion of the ejection tip of the nozzle can be adjusted.

If it is not necessary to adjust the amplitude of the reciprocating movement of the ejection tip of the nozzle 11, the guide body 40 outside the flat portion 16 can be fixed in position with respect to the gun 26. In this case, for example, as shown in FIG. 3, a guide portion 46 for fixing the guide 45 to the mounting portion 34, and a cylindrical shape fixed to the base portion 46 so as to cover the flat portion 16 outside a predetermined position. A structure having the guide body 47 can be adopted. Here, the fluid described above is a gas such as air, a liquid, a mixture of a gas and a liquid, and the like.When a mixture of a gas and a liquid is ejected, the gas is supplied from a fluid supply source. Only to allow the liquid to be introduced into the gun 26,
It is possible to mix a liquid with a gas and eject it by the principle of a Venturi tube. In addition, when the gas is ejected as the fluid, there are, for example, a cleaning operation for removing dust by ejecting air and an operation for removing moisture, and when the liquid is ejected as the fluid, for example, the cleaning liquid is washed. There is a cleaning operation or the like for ejecting a target, and a case where a mixture of gas and liquid is ejected includes, for example, a painting operation.

[0015]

As described above in detail, according to the fluid ejection nozzle of the present invention, the flat portion is curved in the flat direction due to the influence of turbulence generated in the fluid passing inside and the force at the time of ejecting the fluid. This causes a reciprocating motion on the ejection tip side. Therefore, since the distal end side automatically reciprocates, the use of this makes it unnecessary to shake the fluid ejection gun even when performing cleaning work or the like with the fluid ejection gun, thereby reducing the burden on the operator. In addition, since the flat portion has extremely low rigidity in the flat direction, the flat portion is curved in the flat direction, and thus the reciprocating direction on the jetting tip side can be made constant. In addition, since the high-speed reciprocating motion of the nozzle amplifies the pressure wave of the fluid, it becomes an intense shock wave and is generated in a band shape, so that a larger ejection power can be obtained. Further, by providing the weight portion on the ejection tip side, the ejection tip side can be reciprocated with a larger amplitude. Furthermore, if a hollow screw member that is screwed into the inner periphery on the ejection tip side is used as the weight portion, the attachment is simplified.

According to the fluid ejection gun of the present invention, the nozzle is configured to bend the flat portion in the flat direction by the influence of turbulence generated in the fluid passing through the nozzle and the force at the time of ejecting the fluid. Causes a reciprocating motion.
Therefore, since the tip side of the nozzle reciprocates automatically, it is not necessary to shake the nozzle when performing a cleaning operation or the like, and the burden on the operator can be reduced. In addition, since the flat portion of the nozzle has extremely low rigidity in the flat direction, it is curved in the flat direction, and thus the reciprocating direction on the jetting tip side can be made constant.
In addition, since the high-speed reciprocating motion of the nozzle amplifies the pressure wave of the fluid, it becomes an intense shock wave and is generated in a band shape, so that a larger ejection power can be obtained. Further, by providing the weight portion on the ejection tip side of the nozzle, the ejection tip side of the nozzle can be reciprocated with a larger amplitude. Furthermore, if a hollow screw member that is screwed into the inner periphery of the nozzle at the front end side of the nozzle is used as the weight portion, the attachment is simplified. In addition, by providing a guide slidable along the length direction of the nozzle outside the flat portion, if the guide is moved to the ejection tip side of the nozzle, the length from the guide to the ejection tip becomes shorter. Therefore, the amplitude of the reciprocating motion is reduced, and if the guide is separated from the ejection tip side of the nozzle, the length from the guide to the ejection tip becomes longer, and the amplitude of the reciprocating motion increases. In this way, the amplitude of the reciprocating motion of the ejection tip of the nozzle can be adjusted.

[Brief description of the drawings]

1A and 1B show one embodiment of a fluid ejection nozzle of the present invention, wherein FIG. 1A is a cross-sectional view, and FIG.
FIG. 3C is a cross-sectional view along the line B, and FIG. 3C is a cross-sectional view along the line CC shown in FIG.

FIG. 2 is a perspective view showing one embodiment of the fluid ejection gun of the present invention.

FIG. 3 is a perspective view showing a part of another embodiment of the fluid ejection gun of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Fluid ejection nozzle 13 Nozzle main body 14 Weight part 21 Screw member 26 Fluid ejection gun 27 Gripping part 28 Lever (switching means) 37 Guide

Claims (7)

[Claims] 1. A fluid ejection nozzle having a tubular shape and having a flexible flat portion formed therein, the fluid ejection nozzle being configured to allow a fluid to pass therethrough and to eject the fluid to an inner peripheral side thereof. 2. The fluid ejection nozzle according to claim 1, wherein a weight portion is provided on the ejection front end side. 3. The fluid ejection nozzle according to claim 2, wherein the weight portion has a hollow screw member that is screwed into an inner periphery on the ejection tip side. 4. A holding part, a nozzle capable of ejecting a fluid supplied from the fluid supply source, and a switching means for switching communication / shutoff between the fluid supply source and the nozzle while communicating with the fluid supply source. A fluid ejecting gun comprising: a nozzle having a cylindrical shape, through which a fluid passes on an inner peripheral side, and a flexible flat portion being formed. 5. The fluid ejection gun according to claim 4, wherein the nozzle is provided with a weight portion on the ejection tip side. 6. The fluid ejection gun according to claim 5, wherein the weight portion has a hollow screw member that is screwed into an inner periphery of the nozzle on the ejection front end side. 7. The fluid ejection gun according to claim 4, wherein a guide slidable along a length direction of the nozzle is provided outside the flat portion. .