JP2012135721A - Wave motion spraying nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability of a rocking tube.SOLUTION: A wave motion spraying nozzle 10 has a joint 20, a rocking tube 30, a holding part 40 and a supporting part 50. The rocking tube 30 has a flow passage 32, through the inside of which a fluid flows. In the tip end part 36 of the rocking tube 30, a spraying port 38 is opened. The spraying port 38 communicates with the flow passage 32, and thereby, when a pressurized fluid is supplied to the flow passage 32, the pressurized fluid is sprayed into the atmosphere from the spraying port 38. With the spraying, force to rock the rocking tube 30 acts on the spraying port 38 by the reaction when the pressurized fluid is sprayed. The holding part 40 includes a pair of contact members 70, 80 in contact with the right and left both sides of the rocking tube 30 to hold the rocking tube and is supported by a supporting part 50. The rocking tube 30 is rocked toward the Y direction around a part to be held as fulcrum, which is held by a pair of the contact members 70, 80, by the reaction when the pressurized fluid is sprayed from the spraying port 38 of the rocking tube 30.

Description

  The present invention relates to a wave jet nozzle, and more particularly to a wave jet nozzle that jets a pressurized fluid.

  As a conventional wave injection nozzle, for example, there is a nozzle having an adjustment member that fits on the outer periphery of the tube and can move in the longitudinal direction, and a coil spring wound from the adjustment member to the tube tip side (for example, a patent) Reference 1).

  In this wave injection nozzle, the tube swings due to the reaction of the fluid sprayed from the tube, and the spring force of the coil spring wound around the outer periphery of the tube increases according to the amplitude of the tube swinging operation and returns. It is a structure that acts as a force.

Japanese Utility Model Publication No. 6-19879 Japanese Patent Laid-Open No. 10-286494

  The wave injection nozzle of Patent Document 1 has a problem that the coil spring is rubbed by the swinging motion of the tube, so that the tube is easily worn and damaged and is inferior in durability. Further, since the coil spring is mounted and fixed, it is easy to receive a torsional force, and particularly when air is introduced that is unstable in operation, the blowing tube tends to be disturbed due to the weight of the coil spring and the torsional force.

  The fluid ejection nozzle and the fluid ejection gun of Patent Document 2 are provided with a flat portion having flexibility in the tube to ensure the swinging property, but do not have a structure for holding and fixing the flat shape. There is a problem in that the flat portion swells as the internal pressure rises, resulting in poor swingability.

  In addition, the flat part of the tube has a structure in which the crease part receives the force of expansion and contraction when the air is repeatedly pressurized and stopped. There was a problem to do.

  Furthermore, in Patent Document 2, for the purpose of adjusting the swing performance, a weight portion (weight) is provided on the distal end side of the ejecting portion of the tube having the most reciprocating motion, but the swing tube is in a stationary state (operating). In the case of (stop), the tip hangs down in the direction of gravity due to the weight of the tip, and the shape becomes difficult to return. Therefore, an irregularly disturbed rocking state is likely to occur. Further, during the swing, the centrifugal force increases as the weight is added, and the force acts in the direction of falling off on the most distal side. As a result, the swinging tube is always pulled in the same direction. Further, when the swing tube has an increase in temperature or ambient temperature, it is softened (elastically deformed), so that the elongation is accelerated.

  For the above reasons, in Patent Document 2, since the tube on the upstream side of the weight part is stretched and fractured or the weight part is dropped, it cannot withstand long-time use, and dust in a clean room, food, medicine, etc. There is a problem that it cannot be used in a production line that dislikes contamination.

  Furthermore, since the reciprocating motion of the tube in Patent Document 2 increases the speed and the number of amplitudes as the pressure of the fluid used increases, in Patent Document 2, in order to protect the tube from these forces, the swinging tube outer surface is A method of adjusting the amplitude by bringing the tip portion into contact with the inner wall of an amplitude adjusting mechanism or a cylindrical external protective cover to be slid is employed.

  Moreover, in patent document 2, since this site | part and the vibrating tube contact and receive a continuous hit | damage and this impact induces wear and deterioration, the durability which can be used continuously for a long time cannot be ensured. It was.

  Therefore, in view of the above circumstances, the present invention eliminates the structure around the injection port at the tip of the rocking tube that vibrates most intensely, thereby reducing the weight, and rocking the rocking tube upstream of the rocking tube with a small vibration in a predetermined direction. It is an object of the present invention to provide a wave injection nozzle that solves the above-described problems by providing a structure that promotes and stabilizes and a mechanism in which the rocking portion of the tube does not contact any member.

In order to solve the above problems, the present invention has the following means.
(1) The present invention includes a joint connected to a fluid supply path through which pressurized fluid is supplied;
A hollow rocking tube having a base end portion coupled to the joint outlet and a spray port at the tip;
A holding portion that is disposed in the vicinity of the base end portion of the swing tube and holds both sides of the swing tube;
With
The swing tube swings about a held portion held by the holding portion by a reaction when the pressurized fluid is ejected from the ejection port of the swing tube.
(2) The present invention is characterized in that a support portion for supporting the joint, the holding portion, and the swing tube on the same plane is provided.
(3) The holding portion according to the present invention includes a pair of abutting members that abut on both sides of the swing tube.
(4) In the present invention, the swing tube is provided with a deformation assisting member that is fitted closer to the distal end side than the held portion with which the holding portion of the swing tube abuts.
The fluid ejecting force from the ejection port of the rocking tube promotes rocking by an inertial force corresponding to the mass of the deformation assisting member, and the large rocking of the rocking tube is swung by the deformation assisting member. It is characterized by suppressing excessive vibration by the inner wall.
(5) The pair of contact members according to the present invention are characterized in that each of the contact members has a curved surface that contacts the swing tube from the side.
(6) The pair of abutting members of the present invention are formed at a pair of cylindrical portions that hold the swing tube from both sides, and at both axial ends of the cylindrical portion, and hold the swing tube from the upper side and the lower side. A pair of buttocks
The swing tube is deformed into a shape corresponding to a space formed by an outer periphery of the cylindrical portion and the flange portion.
(7) The support portion according to the present invention includes a pair of plate-like bodies that are fixed to both ends of the holding portion and are arranged in parallel so that the plane portions are opposed to each other. The planar portion of the plate-like body swings in a planar space that faces the planar portion.
(8) The pair of plate-like bodies of the present invention is characterized in that the planar portion is formed in a fan shape.
(9) In the present invention, when the length from the center of the holding portion to the injection port of the swing tube is L, the distance L1 from the injection port to the center of the deformation assisting member is 2 / The distance L2 from the center of the holding portion to the center of the deformation assisting member is 1/3 or less of the length L.

  According to the present invention, due to the reaction when the pressurized fluid is ejected from the ejection port of the oscillating tube, the oscillating tube is directed to the direction in which the holding portion is disposed with the held portion held by the holding portion as a fulcrum. Therefore, there is no coil spring or weight (weight) in the vicinity of the tube spout where the rocking is most severe. -The force that stretches or deteriorates can be greatly reduced. In addition, since there is no contact with other parts due to the swinging motion and the swinging tube is less likely to deteriorate or break, durability can be greatly extended, and dust and foreign matter such as food and chemicals can be mixed in the clean room. It can be used even on production lines that dislike it.

  Furthermore, according to the present invention, a hard tube or a short tube that has conventionally been difficult to ensure a stable swinging operation is also provided by placing the deformation assisting member in the vicinity of the holding portion. The inertial force according to the vibration speed is promoted, and the vibration from the swing tube outlet is received by the inner wall of the deformation assisting member and the swing of the tip is suppressed so that the swing does not become too large. The swinging motion of the entire moving tube can be stabilized in the same direction.

It is a top view which shows one Example of the wave injection nozzle by this invention. It is a longitudinal cross-sectional view which follows the AA line in FIG. 1A. It is the rear view which looked at the wave injection nozzle shown in Drawing 1A from the joint side. It is a top view which shows the state which removed the support part of the wave injection nozzle. It is a figure which expands and shows the holding | maintenance part which clamps a rocking | fluctuation tube. It is a figure which shows the state in which the holding | maintenance part hold | maintained the rocking | fluctuation tube. It is a top view which shows a mode that a rocking | fluctuation tube rock | fluctuates typically. It is a top view which shows the 1st step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by injection start. It is a top view which shows the 2nd step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by injection start. It is a top view which shows the 3rd step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by injection start. It is a top view which overlaps and shows the 1st-3rd steps of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by the injection start. It is a top view which shows the 1st step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by a high flow velocity. It is a top view which shows the 2nd step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by a high flow velocity. It is a top view which shows the 3rd step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by a high flow velocity. It is a top view which shows the 4th step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by a high flow velocity. It is a top view which overlaps and shows the 1st-4th step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube by a high flow velocity. It is a top view which shows the modification 1 of a holding | maintenance part. It is a top view which shows the modification 2 of a holding | maintenance part. It is a top view which shows the modification 3 of a holding | maintenance part. It is a top view which shows the modification 4 of a holding | maintenance part. It is a figure which shows the modification 5 of a holding | maintenance part. It is a figure which shows the modification 6 of a holding | maintenance part. It is a figure which shows the modification 7 of a holding | maintenance part. It is a figure which shows the modification 8 of a holding | maintenance part. It is a figure which shows the modification 9 of a holding | maintenance part. It is a top view which shows the modification 10. FIG. 10 is a plan view showing a state in which a support portion is removed from Modification 10. FIG. It is a figure which shows the process 1 which attaches a deformation | transformation auxiliary member to the rocking | fluctuation tube of the modification 10. FIG. It is a figure which shows the process 2 of attaching a deformation | transformation auxiliary member to the rocking | fluctuation tube of the modification 10. FIG. It is a top view which shows the initial stage operation | movement of the rocking | fluctuation operation | movement of the rocking | fluctuation tube of the modification 10. FIG. 10 is a plan view showing a first stage of a swinging operation of a swing tube of Modification 10; 12 is a plan view showing a second stage of the swinging motion of the swing tube of Modification 10. FIG. FIG. 12 is a plan view showing a third stage of the swinging operation of the swing tube of Modification 10; 12 is a plan view showing a fourth stage of the swinging operation of the swing tube of Modification 10. FIG. It is a top view which overlaps and shows the 1st-4th step of the rocking | fluctuation operation | movement of the rocking | fluctuation tube of the modification 10. FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[Configuration of wave injection nozzle]
FIG. 1A is a plan view showing an embodiment of a wave injection nozzle according to the present invention. FIG. 1B is a longitudinal sectional view taken along line AA in FIG. 1A. FIG. 1C is a rear view of the wave injection nozzle shown in FIG. 1A as viewed from the joint side.

  As shown in FIGS. 1A to 1C, the wave injection nozzle 10 includes a joint 20, a swing tube 30, a holding unit 40, and a support unit 50.

  The joint 20 has an upstream connection port 22 to which the fluid supply path 60 is connected at the upstream end. The fluid supply path 60 has a built-in valve mechanism for turning on / off a pressurized fluid made of, for example, compressed air pressurized by an air compressor or liquid (water or cleaning liquid, chemicals) pressurized by a pump. When the valve mechanism is opened, the pressurized fluid is supplied to the connection port 22.

  Further, the joint 20 has a flow path 24 communicated with the upstream connection port 22, and a downstream connection port 26 communicated with the flow path 24 projects from the downstream end portion. The downstream connection port 26 is formed in a cylindrical shape, and has a tube locking portion 28 that protrudes in a tapered shape on the outer periphery. In addition, although the screw type thing is widely used for the joint 20, it is not restricted to this, The tube side which can be attached or detached by one touch using a quick coupling may also be a one touch insertion type.

  The swing tube 30 is, for example, a hollow elastic tube having a flow path 32 through which a fluid passes, which is made of an elastic synthetic resin material. The proximal end portion 34 of the oscillating tube 30 is connected to the downstream connection port 26 of the joint 20, and the tube locking portion 28 is engaged with the inner wall of the flow path 32 to prevent the falling off. In addition, an injection port 38 is opened at the distal end portion 36 of the swing tube 30.

  Since the injection port 38 communicates with the flow path 32, when the pressurized fluid is supplied to the flow path 32, the pressurized fluid is injected from the injection port 38 into the atmosphere. At the same time, a force for swinging the swing tube 30 is applied to the injection port 38 by a reaction when the pressurized fluid is sprayed.

  The holding portion 40 includes a pair of contact members 70 and 80 that contact the held portions on both the left and right sides of the swing tube 30. The pair of abutting members 70, 80 are supported by the support portion 50 in a state of being upright in the vertical direction (Z direction) with respect to the extending direction (X direction) of the swing tube 30. In the vicinity, the swing tube 30 is held from the left-right direction (Y direction). The pair of abutting members 70, 80 are fixed to the support portion 50 by mounting bolts 72, 82 and nuts 73, 83.

  As described above, the swing tube 30 inserted through the gap (space) formed between the pair of contact members 70 and 80 is easily elastically deformed in the left-right direction (Y direction), and the up-down direction (Z direction). ) Is held in a restricted state. Therefore, the swinging tube 30 has the pair of contact members 70 as a fulcrum by the reaction when the pressurized fluid is ejected from the ejection port 38 of the swinging tube 30. , 80 swings in the left-right direction (Y direction). Thereby, the injection port 38 reciprocates in the left-right direction (Y direction) at a predetermined cycle while injecting the pressurized fluid.

  The support portion 50 is composed of a pair of plate-like bodies 52 and 54 arranged in parallel so that the plane portions face each other, and the joint 20, the holding portion 40, and the swing tube 30 are interposed between the pair of plate-like bodies 52 and 54. Are arranged on the same plane.

  The pair of plate-like bodies 52 and 54 are cover members that cover the swinging range of the swinging tube 30, and have a flat surface portions 52 a and 54 a that are formed in a fan shape and smaller in width than the flat surface portions 52 a and 54 a. It has the formed fixing | fixed part 52b, 54b. The fixing portions 52b and 54b of the pair of plate-like bodies 52 and 54 are fixed to the upper and lower surfaces 21a and 21b of the attachment portion 21 of the joint 20 by attachment bolts 90 and nuts 91, respectively.

  Further, the pair of plate-like bodies 52 and 54 are held so as to face each other depending on the height positions of the upper and lower surfaces 21a and 21b of the mounting portion 21 and the height positions of the upper and lower end portions of the contact members 70 and 80. A planar space 100 for swinging the swing tube 30 is formed. The flat space 100 is a space whose upper and lower directions are surrounded by the flat portions 52a and 54a, and is opened in the left-right direction (Y direction) and the injection direction (X direction) on the tip side widened in an arc shape. Yes.

  Therefore, the oscillating tube 30 oscillates in the planar space 100 where the pressurized fluid is ejected from the ejection port 38 into the atmosphere and the planar portions 52a and 54a of the pair of plate-like bodies 52 and 54 face each other. .

  The pair of plate-like bodies 52 and 54 may be formed on a metal plate such as stainless steel, iron, or an aluminum alloy to reinforce the wave injection nozzle 10, or may be a resin plate or a transparent acrylic plate. Alternatively, it may be made of glass or the like so that the swinging motion of the swinging tube 30 can be visually observed.

  The swing range of the swing tube 30 swinging in the planar space 100 is a combination of various conditions such as the elasticity of the swing tube 30 and the pressure and viscosity of the pressurized fluid supplied to the flow path 32. Fluctuates depending on

Spacers 110 and 120 are provided outside the swing range of the swing tube 30 to define the distance between the pair of plate-like bodies 52 and 54 in the up and down direction (Z direction) in the left and right direction (Y direction). It is fixed by mounting bolts 112 and 122 and nuts 113 and 123 so as to be interposed on both the left and right sides of the planar space 100. The spacers 110 and 120 may be provided at a position other than the position shown in FIG. 1A because the spacers 110 and 120 may be fixed at a position where the swinging swinging tube 30 is not in contact. In addition, the spacers 110 and 120 may be resin molded products, or may be fixed by a fitting structure or an adhesive structure.
[About the configuration of the holding part]
FIG. 2A is a plan view showing a state in which the support portion 50 of the wave injection nozzle 10 is removed. FIG. 2B is an enlarged view of the holding portion 40 that holds the swing tube 30. FIG. 2C is a diagram illustrating a state in which the holding unit 40 holds the swing tube 30. 2A to 2C, illustration of the support bodies 52 and 54 of the support portion 50 is omitted.

  As shown in FIGS. 2A to 2C, the pair of contact members 70 and 80 constituting the holding portion 40 have the same size and the same shape, and a pair of cylindrical portions 74 that hold the swing tube 30 from both sides. , 84 and a pair of flange portions 76, 86 formed at both ends in the axial direction of the cylindrical portions 74, 84 and holding the swing tube 30 from the upper side and the lower side.

  Since the swing tube 30 is held by the pair of contact members 70 and 80 from the left-right direction (Y direction) and the vertical direction (Z direction), the cross-sectional shape of the held portion held by the holding portion 40 is the holding direction. It is deformed into a narrow and oval shape (oval shape) in the (Y direction). Further, since the contact members 70 and 80 are configured such that the cylindrical portions 74 and 84 are curved surfaces on the outer periphery and hold both sides of the swing tube 30, the cover members of the swing tube 30 are swung when the swing tube 30 swings. The holding part is not worn and the durability by the swinging operation is greatly improved.

  In addition, since the pair of contact members 70 and 80 in this embodiment are positioned at positions where the outer peripheries of the flange portions 76 and 86 are in contact with each other, the outer diameter of the cylindrical portions 74 and 84 and the outside of the flange portions 76 and 86 are The amount of deformation of the oscillating tube 30 is defined by the ratio with the diameter. Therefore, by appropriately changing the ratio of the outer diameter of the cylindrical portions 74 and 84 and the outer diameter of the flange portions 76 and 86, the deformation amount of the swing tube 30 can be set to an arbitrary value by the pair of contact members 70 and 80. Can be adjusted.

  On the other hand, the reaction when the pressurized fluid is ejected from the injection port 38 at the tip of the oscillating tube 30 is not determined in which direction, and is a force that irregularly changes the direction of the oscillating tube 30. Work as. On the other hand, the oscillating tube 30 is held in each of the upper, lower, left and right directions by the pair of contact members 70 and 80 as described above, and has an oval shape (oval shape) that narrows in the holding direction (Y direction). Therefore, swinging in the up and down direction (Z direction) where the held portion is widened is restricted, and swinging in the left and right direction (Y direction) where the held portion is narrowed is allowed. . Therefore, the reaction when the pressurized fluid is ejected from the ejection port 38 acts on the distal end portion of the oscillating tube 30, and the oscillating tube 30 is supported by the held portion sandwiched between the pair of contact members 70 and 80. Oscillates in the left-right direction (K direction).

  Further, the base end portion 34 of the swing tube 30 is fitted to the outer periphery of the downstream connection port 26 in which the internal flow path 32 protrudes from the joint 20, and the tube locking provided in the downstream connection port 26 is provided. The portion 28 bites into the inner wall of the base end portion 34 and is prevented from being pulled out toward the distal end side of the tube.

  Further, the vicinity of the proximal end portion 34 of the swing tube 30 is sandwiched by a pair of contact members 70 and 80 constituting the holding portion 40, and the cross-sectional shape is deformed into a vertically long rectangular shape. For this reason, the oscillating tube 30 is pulled out by the interaction of the proximal end 34 with the tube locking portion 28 and the holding force of the pair of contact members 70 and 80 even if the centrifugal force due to the oscillating operation is applied. It is prevented from falling off.

  Further, the contact members 70 and 80 are positioned so that the swing range S of the injection port 38 is within a predetermined range (see FIG. 3) with respect to the longitudinal direction (X direction) of the swing tube 30. As described above, the mounting positions of the contact members 70 and 80 with respect to the longitudinal direction (X direction) of the swing tube 30 may be fixed at a position determined according to the swing range S of the injection port 38. Or it is good also as a structure which adjusts a position suitably according to the kind, viscosity, etc. of the fluid to be injected.

  For example, long holes 52c and 54c indicated by broken lines in FIG. 2B are provided in the flat portions 52a and 54a of the plate-like bodies 52 and 54 so as to extend in the longitudinal direction (X direction) of the swing tube 30. An adjustment mechanism for adjusting the positions of the contact members 70 and 80 is configured. Mounting bolts 72 and 82 for fixing the contact members 70 and 80 to the plate-like bodies 52 and 54 are inserted into the long holes 52c and 54c. The mounting bolts 72 and 82 are loosened and the long holes 52c, By moving in the X direction along 54c, the holding positions of the contact members 70 and 80 with respect to the longitudinal direction (X direction) of the swing tube 30 can be adjusted to an arbitrary position.

That is, as the holding position of the swing tube 30 by the contact members 70 and 80 approaches the injection port 38, the lateral width of the swing range S by the injection port 38 becomes narrower, and the swing tube 30 is held by the contact members 70 and 80. As the position is further away from the injection port 38, the lateral width of the swing range S by the injection port 38 becomes wider.
[About the swinging motion of the swinging tube 30]
FIG. 3 is a plan view schematically showing how the swing tube 30 swings. As shown in FIG. 3, the swing tube 30 swings in the left-right direction (Y direction) with the held portion held by the pair of contact members 70, 80 as a fulcrum. Further, the oscillating tube 30 has a characteristic that the region La on the distal end side with respect to the held portion held by the contact members 70 and 80 is deformed so as to be bent slightly behind the distal end portion 36 by 180 degrees.

  In FIG. 3, the distal end portion 36 of the swing tube 30 swings in the left-right direction (Y direction) while being bent so that the injection port 38 faces in the left-right direction, as indicated by a one-dot chain line. Such an operation in the vicinity of the injection port 38 includes an injection force (reaction of fluid injection) that acts on the distal end portion 36 when the pressurized fluid is injected, elasticity of the oscillating tube 30, and centrifugation by the oscillating operation. While the force influences each other and bends in a curved shape, the curvature radius of the curved line changes, so that the swinging operation in the left-right direction (Y direction) is performed. The details of the swinging operation of the swing tube 30 vary depending on conditions such as the fluid injection pressure and the elasticity of the swing tube 30 as will be described later. There is also.

  Therefore, the trajectory of the swing range S of the distal end portion 36 of the swing tube 30 is such that the region La on the distal end side of the held portion held by the pair of contact members 70 and 80 is 180 degrees opposite to the distal end portion 36. By curving, it will draw a parabola.

  Further, the distal end portion 36 of the oscillating tube 30 is a process in which the oscillating range S is oscillated in the left-right direction (Y direction) when the fluid reaches a high flow rate. The rocking direction is reversed to the direction of action of the jetting force (reaction of fluid jetting) at the moment when the jet port 38 is turned sideways. In the intermediate region SC of the swing range S, the spray port 38 is swung while being bent in an S shape with the held portion held by the pair of contact members 70 and 80 as a fulcrum. While changing, the pressurized fluid can be ejected radially in the forward ejection direction.

  Further, in the process in which the injection port 38 passes through the intermediate region SC, the rocking tube 30 on the distal end side of the held portion D (see FIG. 2B) held by the pair of abutting members 70 and 80 is curved and the intermediate point Accelerated towards X. Eventually, when the distal end portion 36 of the swing tube 30 that has passed through the intermediate region SC enters the left and right end region SA or SB, the direction of the injection port 38 accompanying the increase in the radius of curvature of the swing tube 30 is lateral to the swing direction. The swinging direction is reversed at the moment when it is directed in the direction (Y direction).

  As described above, the swing tube 30 swings the swing range S while changing the direction of the injection port 38 with the held portion D held by the contact members 70 and 80 as a fulcrum. No wear occurs and durability is greatly improved. In addition, the oscillating tube 30 does not have a coil spring or a weight (heavy part) or the like around the tube ejection port that is most oscillating as in the prior art (see Patent Document 1), and the portion is significantly reduced in weight. In addition, the force for extending or deteriorating the swinging tube can be greatly reduced.

  Furthermore, in the wave injection nozzle 10, the friction associated with the swinging operation does not act on the swinging tube 30, and the swinging tube 30 is unlikely to be deteriorated or damaged, so that the durability can be greatly extended.

  Further, the wave injection nozzle 10 does not come into contact with other parts associated with the swinging operation of the swing tube 30, and the swing tube 30 is less likely to be deteriorated or damaged, so that the durability can be greatly extended. It can also be used in clean rooms and production lines that do not want to be mixed with dust or foreign substances such as food and chemicals.

  Furthermore, the wave injection nozzle 10 can be used in an unattended automatic conveyor line because it can withstand the above-mentioned use in a clean room, food, medicine, etc., which is impossible with the prior art, and continuous use for a long time. It has become.

  Here, the rocking | fluctuation operation | movement of the rocking | swiveling tube 30 according to the flow velocity of the fluid which flows through the rocking | fluctuation tube 30 is demonstrated in steps. In the following description, the low speed region will be described with reference to FIGS. 4A to 4D, and the high speed region will be described with reference to FIGS. 5A to 5E, but FIGS. 4A to 4D and FIGS. The change of the swing tube 30 continuously performed from the start of injection until reaching the high speed region is shown.

In addition, the flow velocity changes continuously from the low speed at the start of injection to the high speed due to the fluid supply pressure, and the lower the pressure, the faster the speed changes from low speed to high speed. After reaching the high speed region, it stabilizes at a flow rate (high speed) according to the pressure. Accordingly, while the low speed region is instantaneous, the high speed region is continued from immediately after the start of injection until the fluid injection is stopped.
[Oscillating motion of the oscillating tube]
First, the swinging operation at the start of injection will be described with reference to FIGS. 4A to 4D. 4A to 4D show the state in which the upper support body 52 is removed for easy understanding of the swing operation of the swing tube 30. Further, the operation direction at the time of starting the swing of the swing tube 30 is not fixed, and elastically deforms in the Ya direction or the Yb direction depending on the direction of the injection port 38 at that time.

(First stage of swinging operation at the start of injection)
FIG. 4A is a plan view showing a first stage of the swinging motion of the swinging tube 30 by the start of injection. As shown in FIG. 4A, when a pressurized fluid is supplied to the swing tube 30 and a fluid with a low flow velocity is started to be ejected from the ejection port 38, the ejection port 38 is caused by the ejection force (reaction of fluid ejection). Is tilted in either the left or right direction (for example, Yb direction), and the distal end portion 36 of the swing tube 30 is curved in the direction opposite to the tilt direction (fluid ejection direction) of the ejection port 38 (Ya direction). The swing tube 30 is deformed into a gentle S shape when viewed from above.

(Second stage of swinging operation at the start of injection)
FIG. 4B is a plan view showing a second stage of the swinging motion of the swinging tube 30 at the start of injection. As shown in FIG. 4B, the distal end portion 36 of the oscillating tube 30 is opposite to the injection direction (Yb direction) of the first-stage injection port 38 (Ya direction) by the injection force (reaction of fluid injection). Bends and curves. At this time, the oscillating tube 30 bends with the held portions held by the contact members 70 and 80 as fulcrums.

  Therefore, the swing tube 30 is guided so that when the ejection port 38 is moved by the action of the fluid ejection force, the operation direction is either the Ya direction or the Yb direction by the held portions held by the contact members 70 and 80. Therefore, stable swinging operation can be performed without a burden such as twisting.

(Third stage of swinging operation at the start of injection)
FIG. 4C is a plan view showing a third stage of the swinging motion of the swinging tube 30 at the start of injection. As shown in FIG. 4C, the distal end portion 36 of the oscillating tube 30 is opposite to the injection direction (Ya direction) of the second-stage injection port 38 (Yb direction) by the injection force (reaction of fluid injection). Bends and curves. At this time, the oscillating tube 30 bends with the held portions held by the contact members 70 and 80 as fulcrums. Then, the operations in the second and third stages are repeated. Further, as the swinging operation of the swinging tube 30, when the fluid pressure and flow velocity are increased, the movement of the injection port 38 is further accelerated and the amplitude in the left-right direction (swinging range) is also amplified.

FIG. 4D is a plan view showing the first to third steps of the swinging motion of the swinging tube 30 at the start of injection. As shown in FIG. 4D, the swing tube 30 repeats the first to third gradual swing operations 30A to 30C by the injection force at the start of injection. Note that the swinging operation of the swing tube 30 at the start of the injection ends instantaneously and shifts to a swing operation in a high speed region as the flow velocity increases.
(First stage of rocking motion at high flow rate after injection starts)
FIG. 5A is a plan view showing a first stage of the swinging operation of the swing tube 30 at a high flow rate after the start of injection. As shown in FIG. 5A, when pressurized fluid is supplied to the oscillating tube 30 and the flow velocity of the fluid ejected from the ejection port 38 becomes high, the fluid is oscillated by the ejection force (reaction of fluid ejection). The distal end portion 36 of the tube 30 is greatly curved on the side opposite to the injection direction of the injection port 38 (Yb direction). In the case of a high flow rate, the injection force is larger than that at the time of a low flow rate, so that the swing tube 30 is curved in a large arc shape when viewed from above.

(Second stage of swinging operation at high flow velocity after injection starts)
FIG. 5B is a plan view showing a second stage of the swinging operation of the swinging tube 30 at a high flow rate after the start of injection. As shown in FIG. 5B, since the injection force (reaction of fluid injection) is higher at a high flow rate than at a low flow rate, the swing tube 30 does not change the injection direction (Ya direction) of the injection port 38. The tip 36 is displaced in the direction opposite to the injection direction (Yb direction) by the injection force from the injection port 38 so that the front end portion 36 is bundled. At this time, the swing tube 30 swings with the held portion held by the contact members 70 and 80 as a fulcrum.

(Third stage of swinging operation at high flow velocity after injection starts)
FIG. 5C is a plan view showing a third stage of the swinging operation of the swing tube 30 at a high flow rate after the start of injection. As shown in FIG. 5C, the oscillating tube 30 is displaced to the center side while the injection direction of the injection port 38 is reversed in the Yb direction and is bent in the reverse direction (Ya direction) by the injection force from the injection port 38. . At this time, the oscillating tube 30 oscillates with the held portion held by the abutting members 70 and 80 as a fulcrum while maintaining a large arc shape.

(Fourth stage of rocking motion at high flow rate after injection starts)
FIG. 5D is a plan view showing a fourth stage of the swinging operation of the swing tube 30 at a high flow rate after the start of injection. As shown in FIG. 5D, when the flow velocity is high, the above-described injection force (reaction of fluid injection) is larger than when the flow velocity is low, so the swing tube 30 does not change the injection direction (Yb direction) of the injection port 38. The tip 36 is displaced in the direction opposite to the injection direction (Ya direction) by the injection force from the injection port 38 so that the tip end portion 36 is bundled.

  The oscillating tube 30 that oscillates is not linear, and always oscillates between the tip 36 and the portion to be held with a predetermined phase difference. Further, the swinging motion in the vicinity of the held portion held by the contact members 70 and 80 has a smaller amplitude than the swinging motion of the tip portion 36.

  FIG. 5E is a plan view showing the first to fourth steps of the swing operation of the swing tube 30 at a high flow rate after the start of injection. As shown in FIG. 5E, the oscillating tube 30 repeats the first to fourth large oscillating operations 30A1 to 30D1 at a high speed by the injection force when a high flow rate fluid is injected.

  The oscillating operation of the oscillating tube 30 at the high flow rate is a steady operation that is stably repeated at a flow rate corresponding to the supply pressure of the fluid, and is an operation in a normal use state.

  In this way, the wave injection nozzle 10 can stably swing the swing tube 30 even if the fluid supply pressure or flow velocity is changed, so that an excessive twisting force does not act on the swing tube 30. Since the burden associated with the swing is small and no extra friction is generated, the durability is improved regardless of the flow velocity of the jet.

Next, a modified example will be described. In each modification, the same parts as those in the above embodiment are given the same reference numerals, and the description thereof is omitted.
[Modification 1]
FIG. 6A is a plan view showing Modification 1 of the holding unit. As shown in FIG. 6A, the contact members 70 </ b> A and 80 </ b> A of Modification 1 are formed with flat surfaces 76 a and 86 a in which the portions of the flange portions 76 and 86 that are close to each other extend in the X direction. The pair of flat surfaces 76a and 86a are not in contact with each other and are separated by a predetermined distance.

  In addition, the contact members 70A and 80A hold the vicinity of the base end portion 34 of the swing tube 30 from the left and right directions as in the above embodiment, and have a rectangular shape that is narrow in the holding direction (Y direction). Transformed into

  Long holes 52c and 54c through which mounting bolts 72 and 82 for fixing the contact members 70A and 80A are inserted into the flat portions 52a and 54a of the supports 52 and 54 that support both ends of the contact members 70A and 80A. Is provided. The long holes 52 c and 54 c are provided in a direction extending in the Y direction orthogonal to the longitudinal direction (X direction) of the swing tube 30. Therefore, the position of the contact members 70A and 80A in the Y direction can be adjusted by loosening the mounting bolts 72 and 82. That is, the deformation amount of the swing tube 30 by the contact members 70A and 80A can be adjusted to an arbitrary value.

In FIG. 6A, the elongated holes 52c and 54c are extended in the longitudinal direction (X direction) of the oscillating tube 30, thereby holding the contact members 70A and 80A in the longitudinal direction (X direction) of the oscillating tube 30. The position can be adjusted to an arbitrary position.
[Modification 2]
FIG. 6B is a plan view showing Modification Example 2 of the holding unit. As shown in FIG. 6B, the contact members 70B and 80B of Modification 2 have a U-shaped contour when viewed from above, and are semicircular contact portions 74b that contact the swing tube 30, 84b and semicircular flanges 76b and 86b. Therefore, in the contact members 70B and 80B, the portion that contacts the swing tube 30 is formed in a semicircular curved surface, so that the swing tube 30 can be prevented from being damaged.
[Modification 3]
FIG. 6C is a plan view showing Modification 3 of the holding unit. As shown in FIG. 6C, the contact members 70C and 80C of Modification 3 have a D-shaped contour when viewed from above, and arc-shaped contact portions 74c that contact the swing tube 30; 84c and arc-shaped flanges 76c and 86c. Therefore, in the contact members 70C and 80C, the portion that contacts the swing tube 30 is formed into an arcuate curved surface combined with different curvature deformations, so that the swing tube 30 can be prevented from being damaged.
[Modification 4]
FIG. 6D is a plan view showing Modification Example 4 of the holding unit. As shown in FIG. 6D, the contact members 70D and 80D of Modification 4 have a rectangular corner portion on the side of the quadratic spout when viewed from above, and a straight portion that contacts the swing tube 30. The contact portions 74d and 84d are formed of curved surfaces, and the flange portions 76d and 86d are formed of straight and curved portions. Therefore, in the contact members 70D and 80D, the portion that contacts the swing side of the swing tube 30 is formed in a curved surface, so that the swing tube 30 can be prevented from being damaged.
[Modification 5]
FIG. 6E is a diagram illustrating a fifth modification of the holding unit. As shown in FIG. 6E, the contact members 70E and 80E of Modification 5 are formed in curved surfaces in which the contact portions 74e and 84e are recessed toward the center side. Accordingly, the held portion of the swing tube 30 held between the contact portions 74e and 84e is deformed into a barrel shape in which both sides swell outward.

Thereby, in contact member 70E, 80E, since the part contact | abutted to the rocking | swiveling side of rocking | fluctuation tube 30 is formed in the curved surface, damage to rocking | fluctuation tube 30 can be prevented.
[Modification 6]
FIG. 6F is a diagram illustrating a sixth modification of the holding unit. As shown in FIG. 6F, the contact members 70F and 80F of Modification 6 are formed into curved surfaces in which the contact portions 74f and 84f swell toward the outer peripheral side. Accordingly, the held portion of the swing tube 30 held between the contact portions 74f and 84f is deformed into a shape in which both sides are recessed outward.

Thereby, in the contact members 70F and 80F of the rocking tube 30, the portion that contacts the rocking side of the rocking tube 30 is formed in a curved surface, so that the rocking tube 30 can be prevented from being damaged.
[Modification 7]
FIG. 6G is a diagram illustrating Modification Example 7 of the holding unit. As shown in FIG. 6G, the contact members 70G and 80G of Modification 7 have inclined surfaces 75g and 85g formed at the corners of the contact portions 74g and 84g and the flange portions 76 and 86, respectively. Accordingly, the held portion of the swing tube 30 held between the contact portions 74g and 84g is deformed into a chamfered shape at each corner of the rectangle.

Thereby, in the contact members 70G and 80G, the contact portions 74g and 84g that contact the swing side of the swing tube 30 and the inclined surfaces 75g and 85g are formed in a curved surface. Can be prevented.
[Modification 8]
FIG. 6H is a diagram illustrating a modification 8 of the holding unit. As shown in FIG. 6H, the contact members 70H and 80H of Modification 8 are formed with inclined relief surfaces 75h and 85h at the corners of the contact portions 74h and 84h and the flange portions 76 and 86, respectively. Accordingly, the held portion of the swing tube 30 held between the contact portions 74h and 84h is deformed into a shape in which each rectangular corner portion protrudes on both sides.

Thereby, in the contact members 70G and 80G, the contact portions 74h and 84h that contact the swing side of the swing tube 30 are formed in a curved surface, and the inclined relief surfaces 75h and 85h are tilted. 30 damage can be prevented.
[Modification 9]
FIG. 6I is a diagram illustrating a ninth modification of the holding unit. As shown in FIG. 6I, the abutting members 70I and 80I of Modification 9 are formed with holding portions 75i and 85i projecting at the intermediate portions of the abutting portions 74i and 84i. Accordingly, the held portion of the swing tube 30 held between the abutting portions 74i and 84i and the holding portions 75i and 85i is deformed into an I shape in which a rectangular intermediate portion is held inside.

  As a result, in the contact members 70I and 80I, the portion that contacts the swing side of the swing tube 30 is formed into a curved surface, and the holding portions 75i and 85i that protrude from the intermediate portions of the contact portions 74h and 84h hold the contact members 70I and 80I. Therefore, the rocking tube 30 can be securely held and the rocking tube 30 can be prevented from being damaged.

  Also, in the case of Modifications 2 to 5, as in the case of Modification 1, the elongated holes 52c and 54c extend in the Y direction orthogonal to the longitudinal direction (X direction) of the swing tube 30. It is possible to adjust the deformation amount of the swing tube 30 by the contact members 70B to 70I and 80B to 80I to an arbitrary value.

Also, in the modified examples 2 to 5, the elongated holes 52c and 54c are extended in the longitudinal direction (X direction) of the oscillating tube 30 to contact the longitudinal direction (X direction) of the oscillating tube 30. The holding positions of 70B to 70I and 80B to 80I can be adjusted to arbitrary positions.
[Modification 10]
FIG. 7A is a plan view showing Modification Example 10. FIG. FIG. 7B is a plan view showing a state in which the support portion is removed from Modification Example 10 of the swing tube.

  As shown in FIGS. 7A and 7B, in the modified example 10, the rocking tube 30 is made of a material having low elasticity (for example, hard nylon (registered trademark) or the like, a resin tube, or a metal, glass or the like on the surface of the tube). In the case of being formed of a mesh-coated one, a sufficient swinging operation does not occur only by the reaction when the pressurized fluid is ejected from the ejection port 38.

  Therefore, a deformation assisting member 200 is attached to the outer periphery of the swing tube 30 of the present modification 10. The deformation assisting member 200 is made of a metal, is formed in a tapered shape having a large diameter at the tip side, and is provided at a position closer to the injection port 38 than the holding portion 40. Further, since the deformation assisting member 200 applies an inertial force corresponding to the mass to the vicinity of the swing fulcrum of the swing tube 30, the deformation assisting member 200 is shaken by the mass of the deformation assisting member 200 as described later. It is slightly curved in the opposite direction to the moving tube tip (of the injection port 38). Therefore, the swing can be promoted at the initial stage of the swing of the swing tube 30.

  Moreover, since the deformation | transformation auxiliary member 200 has the inner peripheral surface formed in the taper shape, it suppresses that a taper-shaped inner wall contacts a part of outer periphery of the rocking | fluctuation tube 30, and the amplitude of the rocking | fluctuation tube 30 does not become large. You can also Therefore, in the swing stable state, as described later, an effect of suppressing excessive swing of the swing tube 30 (effect of pulling in the direction opposite to the swing direction) can be obtained.

  The attachment position of the deformation assisting member 200 can be defined as follows. For example, in FIG. 7B, when the length from the center of the contact members 70 and 80 to the injection port 30 of the swing tube 30 is L, the distance L1 from the injection port 30 to the center of the deformation assisting member 200 is the length L. The distance L2 from the center of the contact members 70 and 80 to the center of the deformation assisting member 200 is 1/3 or less of the length L. Therefore, the deformation assisting member 200 is provided at a position close to the held portion held by the contact members 70 and 80.

  Here, the attachment process of the deformation | transformation auxiliary member 200 is demonstrated.

  FIG. 8A is a diagram showing a step 1 of attaching the deformation assisting member 200 to the swing tube. As shown in FIG. 8A, in step 1, a cylindrical deformation assisting member 200 is inserted through the outer periphery of the swing tube 30.

  FIG. 8B is a diagram illustrating a process 2 for attaching the deformation assisting member 200 to the swing tube. As shown in FIG. 8B, in step 2, the outer peripheral portion on the base end portion 34 side of the deformation assisting member 200 through which the oscillating tube 30 is inserted is approximately half of the entire length in the Y direction (shown by a one-dot chain line) in the Y direction. To press work. Accordingly, the deformation assisting member 200 is deformed into a flat shape such as a substantially rectangular cross section while the half on the base end portion 34 side is held from both sides in the Y direction.

  8A and 8B, the oscillating tube 30 so that the narrow press surface 202 of the deformation assisting member 200 that is pressed and the holding direction (Y direction) of the holding portion 40 coincide with each other. The base end portion 34 is fitted into the downstream connection port 26 of the joint 20.

  In this way, the deformation assisting member 200 made of metal is provided at a position where the distance L1 from the ejection port 30 in the longitudinal direction of the swing tube 30 to the center of the deformation assisting member 200 is 2/3 or more of the length L. Therefore, even when the elasticity of the oscillating tube 30 is low, the inertial force that causes the oscillating tube 30 to oscillate in the left-right direction (Y direction) increases, and the oscillating operation of the oscillating tube 30 is amplified. Further, since the deformation assisting member 200 is pressed on the upstream half and holds the cross section of the swing tube 30 from the left and right direction (Y direction) in the same manner as the contact members 70 and 80 described above, the swing tube 30 30 is guided in the Y direction by the rocking direction due to the reaction when the pressurized fluid is ejected from the ejection port 38.

  In this modification, the case where the deformation assisting member 200 is provided at one place of the swing tube 30 is described. However, the present invention is not limited to this. For example, the deformation assisting member 200 may be provided at a plurality of places. Is possible.

According to the modified example 10, a hard tube or a short tube, which has conventionally been difficult to ensure a stable swinging motion, is also provided by placing the deformation assisting member 200 in the vicinity of the held portion. The inner wall of the deformation assisting member 200 receives the vibration of the tube 30 and promotes the swinging by the inertial force corresponding to the mass of the deformation assisting member 200, thereby stabilizing the swinging operation of the entire swinging tube 30 in the same direction. Can do.
[Oscillation of the Oscillation Tube of Modification 10]
Here, the rocking | fluctuation operation | movement of the rocking | fluctuation tube 30 of the modification 10 is demonstrated. In FIGS. 9A to 9F, the upper support 52 is removed in order to make the swing operation of the swing tube 30 easier to understand.

(Initial operation of the swing tube 30)
FIG. 9A is a plan view showing an initial operation of the swinging motion of the swing tube of the tenth modification. As shown in FIG. 9A, when pressurized fluid is supplied to the swing tube 30 and fluid starts to be ejected from the ejection port 38, the ejection port 38 moves to the left and right by the ejection force (reaction of fluid ejection). While tilting in any direction (for example, Yb direction), the distal end portion 36 of the swing tube 30 is curved in the direction opposite to the tilting direction (fluid ejection direction) of the ejection port 38 (Ya direction).

  Further, at the mounting position of the deformation assisting member 200 in the swing tube 30, a delay occurs with respect to the operation of the distal end portion 36 due to the mass of the deformation assisting member 200, so that the curve is curved in the Yb direction opposite to the distal end portion 36. Therefore, the oscillating tube 30 is deformed into a gentle S shape when viewed from above.

  In this initial operation, the portion curved in the Yb direction of the oscillating tube 30 contacts the tapered inner wall of the deformation assisting member 200, so that the base portion of the oscillating tube 30 (the tip side from the contact members 70, 80) It is pushed back in the Yb direction by the deformation assisting member 200. As a result, the swing tube 30 is pressed in the swing direction by the deformation assisting member 200 and an inertial force corresponding to the mass of the deformation assisting member 200 acts, so that the swinging operation is promoted.

(First stage of swing motion)
FIG. 9B is a plan view showing a first stage of the swinging motion of the swing tube of the tenth modification. As shown in FIG. 9B, when pressurized fluid is supplied to the swing tube 30 and fluid at a high flow rate is started to be ejected from the ejection port 38, the ejection port 38 is caused by the ejection force (reaction of fluid ejection). Is inclined in either the left or right direction (for example, the Ya direction), and the distal end portion 36 of the swing tube 30 is greatly curved in the direction opposite to the injection direction of the injection port 38 (Yb direction). In the case of a high flow rate, since the injection force is larger than that in the case of a low flow rate, the swing tube 30 is curved in a large arc shape.

  In the process in which the swing tube 30 swings in the Ya direction, an inertial force corresponding to the mass of the deformation assisting member 200 acts, so that the amplitude of the swing operation is rapidly amplified. When the distal end portion 36 of the swing tube 30 swings greatly and comes into contact with the tapered inner wall of the deformation assisting member 200, the reaction force due to the contact acts on the outer periphery of the swing tube 30 as a force for pushing back the swing tube 30. Therefore, excessive swinging in the swing direction is suppressed. When the swing range of the distal end portion 36 of the swing tube 30 is amplified, a part of the outer periphery of the swing tube 30 is only momentarily in contact with the tapered inner wall of the deformation assisting member 200. 30 becomes the structure which is hard to wear.

(Second stage of rocking motion)
FIG. 9C is a plan view showing a second stage of the swinging motion of the swing tube of Modification 10. FIG. As shown in FIG. 9C, when the flow velocity is high, the injection force (reaction of fluid injection) is larger than when the flow velocity is low, so the swing tube 30 does not change the injection direction (Ya direction) of the injection port 38. The tip 36 is displaced in the direction opposite to the injection direction (Yb direction) by the injection force from the injection port 38 so that the front end portion 36 is bundled. At this time, the swing tube 30 swings with the held portion held by the contact members 70 and 80 as a fulcrum.

  Further, the oscillating tube 30 is accelerated by the fluid ejection force and oscillates at a high speed because an inertial force corresponding to the mass of the deformation assisting member 200 acts.

(Third stage of swinging motion)
FIG. 9D is a plan view showing a third stage of the swinging motion of the swing tube of the tenth modification. 9D, the oscillating tube 30 is displaced in the Ya direction while being deflected in the reverse direction (Ya direction) by the injection force from the injection port 38 while the injection direction of the injection port 38 is reversed in the Yb direction. . At this time, the oscillating tube 30 oscillates with the held portion held by the abutting members 70 and 80 as a fulcrum while maintaining a large arc shape.

(Fourth stage of rocking motion)
FIG. 9E is a plan view showing a fourth stage of the swinging motion of the swing tube of Modification 10. As shown in FIG. 9E, since the injection force (reaction of fluid injection) is large at a high flow velocity, the swing tube 30 moves the distal end portion 36 without changing the injection direction (Yb direction) of the injection port 38. It is displaced in the direction opposite to the injection direction (Ya direction) by the injection force from the injection port 38 so as to be bundled.

  FIG. 9F is a plan view showing the first to fourth steps of the swinging motion of the swinging tube of Modification 10 in an overlapping manner. As shown in FIG. 9F, the swing tube 30 repeats the first to fourth large swing operations 30A2 to 30D2 at high speed by the injection force when a high flow rate fluid is jetted.

  Therefore, even if the oscillating tube 30 has low elasticity, an inertial force corresponding to the mass of the deformation assisting member 200 acts on the oscillating tube 30, and thus the oscillating tube 30 can stably perform the oscillating operation. Further, when the amplitude of the oscillating tube 30 increases, the distal end portion 36 of the oscillating tube 30 comes into contact with the tapered inner wall of the deformation assisting member 200, and the reaction force due to the contact oscillates on the outer periphery of the oscillating tube 30. Since it acts as a force for pushing back the tube 30, the deformation assisting member 200 suppresses the movement in the vicinity of the held portion and prevents the swinging tube 30 from swinging excessively.

  Further, since the deformation assisting member 200 is attached to the deformation assisting member 200 by a mass, the deforming assisting member 200 is slightly bent in the direction opposite to the tip of the swinging tube (of the injection port 38). Then, it is possible to obtain the effect of promoting the oscillation and further suppressing the oscillation of the oscillation tube 30 in an oscillation stable state (an effect of pulling in the direction opposite to the oscillation direction).

  Further, as described above, since the swing tube 30 swings in a state of being deformed into an S shape, the curved portion between the attachment portion of the deformation assisting member 200 and the tip portion 36 is opposite to the movement of the tip portion 36. Operates to curve. Therefore, the force for swinging the swing tube 30 acts in the Ya and Yb directions perpendicular to the tube extending direction, does not act in the direction of pulling the deformation assisting member 200 toward the distal end portion 36 side, and is deformed. Since the amplitude of the auxiliary member 200 is small, the deformation auxiliary member 200 is prevented from falling off.

  The wave jet nozzle is connected to an injection port such as an air gun for injecting compressed air, or draining, drying, dust removal, mixing of gas and liquid, or a cleaning gun for injecting water. can do.

  The pressing and fixing method using the fixing bolts of the contact members 70 and 80 and the holes 72 and 82 is not limited to this, and pressing and fixing with bolts from the same direction, a pressing method using a spring structure such as metal or resin, injection molding, or the like. It is good also as an integral structure.

DESCRIPTION OF SYMBOLS 10 Wave injection nozzle 20 Joint 21 Attachment part 22 Upstream side connection port 24 Channel 26 Downstream side connection port 28 Tube latching part 30 Oscillation tube 34 Base end part 36 Tip part 38 Injection port 40 Holding part 50 Support parts 52 and 54 Plate-like body 52a, 54a Plane part 52b, 54c Fixed part 52c, 54c Long hole 60 Fluid supply path 70, 80, 70A-70I, 80A-80I Contact member 72, 82, 90, 112, 122 Mounting bolt 73, 83 91, 113, 123 Nut 74, 84 Cylindrical part 74b-74h, 84b-84h Abutting part 76, 86, 76b-76d, 86b-86d Ridge part 76a, 86a Flat surface 75g, 85g Inclined surface 75h, 85h Inclined relief surface 75i, 85i Holding part 100 Planar space 110, 120 Spacer 200 Deformation auxiliary member 202 Press surface

Claims (9)

A joint connected to a fluid supply path through which pressurized fluid is supplied;
A hollow rocking tube having a base end portion coupled to the joint outlet and a spray port at the tip;
A holding portion that is disposed in the vicinity of the base end portion of the swing tube and holds both sides of the swing tube;
With
The oscillating tube oscillates with the held portion held by the holding portion as a fulcrum by a reaction when the pressurized fluid is ejected from the ejection port of the oscillating tube. nozzle.   The wave injection nozzle according to claim 1, further comprising a support portion that supports the joint, the holding portion, and the swing tube on the same plane.   The wave injection nozzle according to claim 1, wherein the holding portion includes a pair of abutting members that abut on both sides of the swing tube. A deformation assisting member fitted to the distal end side of the held portion with which the holding portion of the rocking tube abuts is provided on the rocking tube;
The fluid ejecting force from the ejection port of the rocking tube promotes rocking by an inertial force corresponding to the mass of the deformation assisting member, and the large rocking of the rocking tube is swung by the deformation assisting member. The wave injection nozzle according to claim 1, wherein excessive vibration is suppressed by an inner wall.   The wave jet nozzle according to claim 3, wherein each of the pair of abutting members has a curved surface that abuts against the swing tube from the side. The pair of contact members includes a pair of cylindrical portions that hold the swing tube from both sides, and a pair of flange portions that are formed at both ends in the axial direction of the cylindrical portion and hold the swing tube from the upper side and the lower side. Have
6. The wave injection nozzle according to claim 3, wherein the oscillating tube is deformed into a shape corresponding to a space formed by an outer periphery of the cylindrical portion and the flange portion. The support part is composed of a pair of plate-like bodies fixed in parallel at both ends of the holding part and arranged in parallel so that the plane parts face each other,
The wave spray nozzle according to claim 2, wherein the swing tube swings in a planar space where the planar portions of the pair of plate-like bodies are opposed to each other.   The wave jet nozzle according to claim 7, wherein the pair of plate-like bodies have the flat portion formed in a fan shape. When the length from the center of the holding portion to the spray port of the swing tube is L, the distance L1 from the spray port to the center of the deformation assisting member is 2/3 or more of the length L, and the holding portion 5. The wave injection nozzle according to claim 4, wherein a distance L <b> 2 from the center of the deformation to the center of the deformation assisting member is 1/3 or less of the length L. 6.

Images