JP3955658B2 - Fluid ejection gun - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a gas, liquid or relates Fluid spray gun that is used when ejecting the mixture of gas and liquid.
[0002]
[Prior art]
A fluid ejection gun is used when fluid such as gas, liquid, or a mixture of gas and liquid is ejected. Such a fluid ejection gun communicates with a fluid supply source, and also has a gripper, a nozzle capable of ejecting fluid supplied from the fluid supply source, and a switching means for switching communication / blocking between the fluid supply source and the nozzle. Conventionally, the nozzle is not flexible.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional fluid ejection gun, for example, when used for cleaning work by ejecting air to remove dust, it is performed while reciprocating the collision position of the air by shaking the gun. In a wide area, there was a problem that the work of shaking the gun put a burden on the operator.
In addition, the fluid jet output is determined by the ability on the fluid supply source side and the shape of the flow path, and there is a problem that it is impossible to cope with the case where a larger jet output is desired.
[0004]
Accordingly, an object of the present invention is to reduce the burden on the operator even when used in cleaning or the like, also is to provide a Ru Fluid spray gun may obtain a larger ejection force.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a fluid ejection gun according to the present invention communicates with a fluid supply source, swings to the gripping portion, a nozzle capable of ejecting fluid supplied from the fluid supply source, and the gripping portion. A fluid ejection gun that is freely provided and switches between communication and blocking between the fluid supply source and the nozzle, and a guide portion that linearly extends in the opposite direction from the grip portion to the lever; A curved portion that curves in a semicircular shape from the opposite side to the grip portion of the guide portion, and an extension that linearly extends forward from the opposite side of the curved portion to the guide portion so as to be parallel to the guide portion. The nozzle is formed at the tip of the extending portion, and is formed in a cylindrical shape and has a flat portion having flexibility while allowing fluid to pass through to the inner peripheral side, Removable and slidable support for the guide And a support part that can be fixed to the guide part at an arbitrary position, a base part fixed to the support part, and a guide fixed to the base part so as to cover the outside of the flat part of the nozzle. A guide that is slidable along the length direction of the nozzle by having a main body is provided outside the flat portion.
[0006]
This ensures that the nozzle is in force during jetting effects and fluid turbulence caused in the fluid passing therein, will cause a reciprocating motion in jet tip side while bending the flat portion in its flat direction .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
Figure 1 (hereinafter referred to as nozzle) flow body ejection nozzle 11 intended to show, the nozzle 11 includes a cylindrical nozzle body 13 having a through hole 12 penetrating along the length, the nozzle body 13 And a weight portion 14 provided on one end side of the.
The nozzle body 13 is integrally formed of a flexible material such as nylon, Teflon, polyurethane, polypropylene, etc., with a substantially constant thickness, and has a width in one direction orthogonal to the length direction within a predetermined intermediate range. Are formed so as to have a flat portion 16 having a so-called flat shape that is smaller than a width in a direction perpendicular to the length direction and perpendicular to the one direction, and predetermined portions on both sides of the flat portion 16, that is, both ends of the nozzle body 13 are formed. Cylindrical cylindrical portions 17 and 18 are formed in the ranges. The flat portion 16 has a flat shape even when the nozzle body 13 is linear along the length direction.
[0008]
The weight portion 14 is formed with a through-hole 20 penetrating along the axial direction in the center thereof to form a substantially cylindrical shape, and a screw portion 22 is formed over the entire length of the outer peripheral portion, and is screwed into the cylindrical portion 17 on one side. The member 21 is composed of a cylindrical fitting member 23 that fits the cylindrical portion 17 on one side to the inside. The screw member 21 is made of a metal material, and the fitting member 23 is stretchable such as silicon. Made of sex material.
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 screw member 21 is prevented from coming off from the nozzle body 13. Instead of forming the female thread portion 24 on the inner peripheral side of the cylindrical portion 17, it may be fixed by a force generated by deformation of the cylindrical portion when the screw member 21 is simply screwed into the cylindrical portion 17.
Further, the fitting member 23 has an inner diameter smaller than the outer diameter of the cylindrical portion 17 to which the screw member 21 is screwed, and thereby a force generated by deformation caused by fitting the cylindrical portion 17 inside thereof. This prevents the cylindrical portion 17 from coming off. Here, the fitting member 23 is adapted to fit the cylindrical portion 17 so as to form a portion that is not fitted to one end side thereof, so that the fitting member 23 does not reach the through hole 20 of the screw member 21. The stretchable shape covers the tip side of the cylindrical portion 17.
[0009]
FIG. 2 shows a fluid ejection gun (hereinafter referred to as a gun) 26 to which the nozzle 11 is attached, and a gripping portion 27 gripped by an operator and swingable so as to be substantially parallel to the gripping portion 27. And a lever (switching means) 28 provided in the gripping portion 27 in a state where the lever 28 is disposed in the front (fingertip direction).
The gun 26 has a guide portion 30 that extends linearly in the opposite direction from the grip portion 27 to the lever 28, and a curved portion 31 that curves in a semicircular shape from the opposite side with respect to the grip portion 27 of the guide portion 30. And an extending portion 32 extending linearly forward so as to be parallel to the guiding portion 30 from the opposite side to the guiding portion 30 of the bending portion 31, and the guiding portion 30 and the bending portion 31. The extending portion 32 is formed by bending one cylindrical tube body 33.
An attachment part 34 is provided at the tip of the extension part 32, and the extension part 32 is fitted in the state where the cylindrical part 18 on the opposite side to the weight part 14 is fitted to the attachment part 34. It is attached to make a straight line. The nozzle 11 is attached, for example, so that the flattened direction (thin width direction) of the flattened portion 16 is the left-right direction in a state where the gripping portion 27 is aligned vertically, and rotation is restricted in the attached state. ing.
[0010]
The gun 26 is communicated with a fluid supply source (not shown) through a pipe (not shown) attached to an attaching / detaching portion 35 provided on the opposite side of the guide portion 30 of the grip portion 27, and the lever 28 is moved. By swinging toward the grip portion 27 side, the fluid supplied from the fluid supply source passes through the grip portion 27, the guide portion 30, the bending portion 31, the extension portion 32, the attachment portion 34, and the nozzle 11. The nozzle 11 is ejected from the tip portion on the weight portion 14 side. The lever 28 is biased by a spring or the like in the opposite direction with respect to the gripping portion 27, and by releasing the swing toward the gripping portion 27, the lever 28 is biased in the opposite direction by the biasing force of the spring. Oscillating to stop the ejection from the tip of the nozzle 11, thus switching between communication / blocking of the fluid supply source and the nozzle 11.
[0011]
In addition, the gun 26 is provided with a guide 37 slidable along the length direction of the nozzle 11. The guide 37 is detachably and slidably supported with respect to the guide portion 30 and can be fixed to the guide portion 30 at an arbitrary position, and a base portion 39 fixed to the support portion 38. The guide body 40 is fixed to the base 39 so as to cover the outside of the flat portion 16 of the nozzle 11.
The support portion 38 includes a holding body 42 made of a spring material that sandwiches the guide portion 30, and a pair of operating pieces 43 provided on both sides of the holding body 42. When the gripping body 42 is gripped from both sides in the direction in which they are close to each other, the gripping body 42 releases the gripping of the guide portion 30, and is thereby movable along the guide portion 30. Then, when the gripping body 42 is released from being gripped by being moved to an appropriate position, the gripping body 42 grips the guide portion 30 and is fixed to the guide portion 30.
The guide body 40 has a cylindrical shape, and the nozzle 11 is inserted inside the guide body 40 along the axial direction with a gap between the nozzle 11 and the outer side of the nozzle 11 so as to cover the outside. It has become.
And the position with respect to the nozzle 11 of the guide main body 40 will be changed by moving the support part 38 along the guide part 30 as mentioned above.
[0012]
By adopting the configuration as described above, 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. In the nozzle 11, a turbulent flow of fluid is generated inside due to a change in the cross-sectional shape of the cylindrical portions 17, 18 and the flat portion 16, a pulsation of fluid, and the like. With the force at the time of ejection, the flat portion 16 of the nozzle 11 made of a flexible material is curved in the flat direction and causes a reciprocating motion along the flat direction on the ejection tip side.
Therefore, since the tip end side of the nozzle 11 automatically reciprocates, 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. Moreover, since the flat portion 16 of the nozzle 11 has extremely small rigidity in the flat direction, the flat portion 16 is curved in the flat direction, and in this way, 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 is generated as a violent shock wave in a band shape, and a larger jet output can be obtained.
[0013]
Moreover, since the weight part 14 is provided on the ejection tip side of the nozzle 11, the ejection tip side of the nozzle 11 can be reciprocated with a larger amplitude.
Furthermore, since the hollow screw member 21 screwed into the inner periphery on the ejection tip side of the nozzle 11 is used as the weight portion 14, the attachment becomes simple.
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 in the moving direction of the flat portion 16, so that the nozzle 11 This restricts the reciprocal motion range, that is, the amplitude. When 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 shortened, so that the amplitude of the reciprocating motion is reduced, and the guide 37 is ejected from the nozzle 11. If 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 becomes larger. In this way, the amplitude of the reciprocating motion of the ejection tip of the nozzle 11 can be adjusted.
[0014]
As a reference technique, when it is not necessary to adjust the amplitude of the reciprocating motion of the ejection tip of the nozzle 11, the guide main body 40 outside the flat portion 16 can be fixed to the gun 26. In this case, for example, as shown in FIG. 3, a base portion 46 that fixes the guide 45 to the mounting portion 34, and a cylindrical shape that is fixed to the base portion 46 so as to cover the outside of the flat portion 16 at a predetermined position. A structure having a guide body 47 can be employed.
Here, the fluid described above is a gas such as air, a liquid, a mixture of a gas and a liquid, or the like. When the mixture of a gas and a liquid is ejected, the gas is supplied from a fluid supply source. For example, the liquid can be introduced into the gun 26, and the liquid can be mixed with the gas and ejected by the principle of the Venturi tube.
In addition, as a case where gas is ejected as a fluid, for example, there are a cleaning operation for removing dust by ejecting air, an operation for removing moisture, and a case where a liquid is ejected as a fluid. There is a cleaning operation or the like to be ejected to the target, and examples of the case where the mixture of gas and liquid is ejected include a painting operation and the like.
[0015]
【The invention's effect】
According to the fluid ejection gun of the present invention, the nozzle reciprocates toward the ejection tip side while curving the flat portion in the flat direction by the influence of the turbulent flow generated in the fluid passing through the nozzle or the force at the time of fluid ejection. Will be generated.
Therefore, since the tip end side of the nozzle automatically reciprocates, 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. Moreover, since the rigidity of the flat portion of the nozzle becomes extremely small, the nozzle is curved in the flat direction, and in this way, the reciprocating direction on the ejection 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 is generated as a violent shock wave in a band shape, and a larger jet 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 the hollow portion is screwed into the inner periphery of the nozzle on the ejection tip side as the weight portion, the attachment becomes simple.
In addition, by providing a guide that is slidable along the length direction of the nozzle outside the flat portion, if the guide is moved toward the ejection tip side of the nozzle, the length from the guide to the ejection tip is shortened. 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 is increased, so the amplitude of the reciprocating motion is increased. In this way, the amplitude of the reciprocating motion of the nozzle ejection tip can be adjusted.
[Brief description of the drawings]
FIG. 1 shows a fluid ejection nozzle used in an embodiment of a fluid ejection gun of the present invention, wherein (a) is a cross-sectional view, and (b) is a cross section taken along line BB shown in (a). FIG. 4C is a cross-sectional view taken along the line CC shown in FIG.
FIG. 2 is a perspective view showing an embodiment of a fluid ejection gun of the present invention.
FIG. 3 is a perspective view showing a part of a fluid ejection gun according to a reference technique .
[Explanation of symbols]
11 fluid jetting nozzle 13 nozzle body 14 by weight part 21 screw member 26 fluid spray gun 27 gripper 28 levers <br/> 37 guide

Claims (1)

In communication with the fluid source,
A gripping part;
A nozzle capable of ejecting fluid supplied from the fluid supply source;
A lever that is swingably provided in the gripping part and switches communication / blocking between the fluid supply source and the nozzle;
In a fluid ejection gun having
A guide portion that extends linearly in the opposite direction from the grip portion to the lever, a curved portion that curves in a semicircular shape from the opposite side to the grip portion of the guide portion, and the guide portion of the curved portion An extension portion extending linearly forward from the opposite side to be parallel to the guide portion, and a fluid is passed through the inner peripheral side in a cylindrical shape at the tip of the extension portion And the nozzle formed with a flat part having flexibility is attached,
A support part that is detachably and slidably supported with respect to the guide part and can be fixed to the guide part at an arbitrary position, a base part fixed to the support part, and an outer side of the flat part of the nozzle And a guide main body fixed to the pedestal so as to cover the nozzle, and a guide that is slidable along the length direction of the nozzle is provided outside the flat part. gun.

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