JP2007253040A - Rotational wave nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve impact resistance function and durability by improving the motive energy conversion efficiency of an elastic tube which rotates by supplying a pressurized fluid and preventing wear resistance. <P>SOLUTION: The rotational wave nozzle 10 comprises an elastic tube 20 to which the pressurized pressure-fluid is supplied, a cylindrical guide 30 into which the elastic tube 20 is inserted, a fluid jetting port 40 formed at the tip end of the elastic tube 20, and a rotation supporting part 50 for supporting the cylindrical guide 30 in a rotable manner. Since the rotational wave nozzle 10 has the configuration that the cylindrical guide 30 is supported in rotable manner by the rotation supporting part 50, the fluid jetting port 40 is pushed against the inner wall of the cylindrical guide 30 and integrally rotated with the cylindrical guide 30 at the time of rotating movement of the elastic tube 20 while sagging the elastic tube 20 in an S-shape by back action of the jet current jetted out of the fluid jetting port 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotating wave nozzle, and in particular, an elastic tube is bent by the action of a fluid ejected from a fluid ejection port, and rotates the tip side of the elastic tube to eject the fluid ejected from the fluid ejection port as a rotating wave. The present invention relates to a rotating wave nozzle configured as described above.

  When pressure is applied to fluid (including all fluids such as gas, liquid, gas / liquid mixture, gas / powder mixture, etc.) and supplied to the elastic tube, the reaction at the tip of the elastic tube when the fluid is ejected It is known that a phenomenon occurs in which the elastic tube is deformed into an S shape to change the direction of the injection port.

  This phenomenon will be described in detail. The elastic tube used in the rotating wave nozzle is mainly formed of a material having elasticity such as polyurethane, nylon, silicon, or rubber. When a pressurized fluid (for example, a liquid such as water or a gas such as air or nitrogen) is supplied from the base end (fixed end) of the elastic tube, the distal end (free end) of the elastic tube becomes irregular due to the elasticity of the tube itself. Perform a swing motion. This is because the elastic tube that has undergone a reaction caused by the injection of pressurized fluid from the distal end opening (injection port) of the soft elastic tube is deformed and the injection direction is changed while the elastic tube is deflected, thereby injecting. It is an irregular motion that changes the direction.

  A rotating wave nozzle that utilizes such a phenomenon has been proposed (see, for example, Patent Document 1). The rotational wave nozzle described in Patent Document 1 has a configuration in which an elastic tube is inserted into a cylindrical guide, and the cylindrical guide is caused by a reaction when an injection port provided at the tip of the elastic tube ejects fluid. By performing a rotational movement along the inner wall, the fluid ejected from the ejection port is configured to form a circular ejection pattern.

Further, the elastic tube receives frictional resistance because it rotates while contacting the inner wall of the cylindrical guide when the distal end side rotates with the proximal end side fixed. For this reason, the elastic tube is twisted, and a force to return intermittently (not necessarily a regular cycle) acts. Because the contact part of the elastic tube is separated from the inner wall of the guide at that moment, it is not an exact circular motion, but the position where the disturbance or twist returns constantly changes, so that it rotates in an irregular D shape. There are many.
JP 11-123350 A

  In the above conventional system, the inner wall of the cylindrical guide is forcibly brought into contact with the inner wall to change it into a rotational motion, so that the friction resistance applied to the elastic tube is always large, and the elasticity that was positioned on the axis at the start of fluid supply Since the impact force when the tube contacts the cylindrical guide is strongly applied, there has been a problem that the inner wall of the cylindrical guide and the elastic tube are worn out in a short period of use.

  Also, with the conventional method, the amount of abrasion powder generated from the inner wall of the cylindrical guide or the elastic tube is large, and fragments of the elastic tube cut off due to friction may fly away. It could not be used.

  Furthermore, the conventional method has a problem that when it is used in winter or cold areas where the temperature is low, the elastic tube is hardened and hard to rotate due to low temperature, causing irregular vibrations, and normal rotational waves cannot be obtained. was there.

  In addition, in the above-mentioned conventional method, the frictional resistance is too large, so the area where stable rotation can be obtained is narrow, and stable immediately due to changes in flow velocity and fluid type (changes in temperature, viscosity, specific gravity, etc.) There was a problem that rotational motion could not be obtained.

  In addition, when using a soft tube that is easy to obtain rotational motion, it is easy to wear and break, and a device is attached to the outer circumference of the tube so that rotation can be achieved by changing the balance and elasticity. However, stable rotation was obtained only under specific conditions (narrow range).

  Further, the elastic tube is not a circular motion having an accurate period on the front end side, and often rotates in a D-shape with irregular turbulence, so that the jetted wave flow is likely to be disturbed. For example, in a cleaning operation on a conveyor-conveyance line, it is difficult to stably remove and move deposits such as dirt in a predetermined direction (outside the circumferential orbit of the rotating jet wave).

  For these reasons, elastic tube type rotary wave injection nozzles have not been widely used at this stage.

  In view of the above circumstances, an object of the present invention is to provide a rotating wave nozzle that solves the above-described problems.

  In order to solve the above problems, the present invention has the following means.

  The present invention supplies a pressurized pressure fluid to an elastic tube inserted through a cylindrical guide, and rotates the fluid ejection port by a reaction of a jet flow ejected from a fluid ejection port at the tip of the elastic tube. In the wave nozzle, the problem is solved by providing a rotation support portion that rotatably supports the cylindrical guide.

  The rotation support portion includes a bearing that rotatably supports a proximal end of the cylindrical guide, and a holding member that holds the bearing at a position with an axis extending from the elastic tube as a rotation center. desirable.

  The holding member is preferably mounted between the fixed end of the elastic tube and the bearing.

  It is desirable that the holding member is a cover member formed in a cylindrical shape for storing the cylindrical guide.

  The cylindrical guide is preferably formed in a tapered shape with a proximal end of the inner wall with which the elastic tube abuts having a small diameter and a distal end having a large diameter.

  The elastic tube preferably includes a first rotational force transmission member that abuts on an upstream inner wall of the cylindrical guide.

  It is desirable that the elastic tube has a second rotational force transmission member that abuts on the downstream inner wall of the cylindrical guide.

  The bearing preferably includes an outer ring held by the holding member, an inner ring to which a proximal end of the cylindrical guide is fitted, and a plurality of balls that roll between the outer ring and the inner ring. .

  According to the present invention, since the cylindrical guide is rotatably supported by the bearing, when the elastic tube reciprocating which is pressurized and disturbed by the injection force contacts the inner wall of the cylindrical guide, the elastic tube is disturbed. As a result, a force biased in either the clockwise or counterclockwise direction is repeatedly applied to the inner wall of the cylindrical guide, so that the cylindrical guide starts to rotate. Furthermore, since the elastic tube rotates integrally in the same direction so that the elastic tube is in close contact with the inner wall of the cylindrical guide, there is no generation of friction between the elastic tube and the cylindrical guide, and the elastic tube It is possible to prevent wear and improve durability. As a result, the life of the elastic tube can be greatly extended, and the wear resistance of the elastic tube and cylindrical guide is less likely to be generated. Occurrence can also be prevented. In addition, since the frictional resistance that the elastic tube receives is small and there is no sudden twist or return, and an appropriate centrifugal force is applied, the tip of the elastic tube can smoothly move circularly along the inner periphery of the cylindrical guide. it can.

  Furthermore, due to the effect of the rotational force transmission member, the turbulent movement of the elastic tube that occurs in the initial stage of fluid ejection is quickly transmitted to the inner wall of the cylindrical guide, making it possible to easily rotate synchronously. It has become.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a rotating wave nozzle according to the present invention. FIG. 2 is a longitudinal sectional view showing a rotating wave nozzle. As shown in FIGS. 1 and 2, the rotating wave nozzle 10 includes an elastic tube 20 to which a pressurized pressure fluid is supplied, a cylindrical guide 30 through which the elastic tube 20 is inserted, and a distal end of the elastic tube 20. And a rotation support portion 50 that rotatably supports the cylindrical guide 30.

  Since the rotation wave nozzle 10 is configured to rotatably support the cylindrical guide 30 by the rotation support portion 50, the rotation wave nozzle 10 rotates while bending the elastic tube 20 into an S shape by the reaction of the jet ejected from the fluid ejection port 40. When moving, the vicinity of the fluid ejection port 40 is pressed against the inner wall of the cylindrical guide 30.

  The elastic tube 20 is made of, for example, a hollow pipe formed of an elastic material such as polyurethane, nylon, silicon, or rubber, and a passage that penetrates the inside serves as a flow path. The elastic tube 20 has an upstream end (base end) 20 a that is press-fitted into the fitting portion 62 of the fixing member 60, and a downstream end (tip end) 20 b that protrudes a predetermined length from the front end of the cylindrical guide 30. The opening is a fluid ejection port 40.

  In addition, the elastic tube 20 extends linearly as shown in FIG. 2 in a state where no pressure fluid is supplied. However, since the elastic tube 20 is actually formed of an elastic material, the tip portion is lowered by gravity. It will be in a state of bending in the direction of gravity. The first part has the purpose of easily transmitting the rotational force to the inner wall of the cylindrical guide 30 at two locations, the middle part and the tip part of the elastic tube 20, and protecting the elastic tube 20 from friction and impact. The second rotational force transmitting members 24 and 26 are fixedly fitted. The rotational force transmission members 24 and 26 have the same shape, and are tapered portions that are expanded in a direction away from the outer periphery of the elastic tube 20 and the fitting portions 24a and 26a that are fitted to the outer periphery of the elastic tube 20. It has elastic deformation parts 24b and 26b. The elastic deformation portions 24b and 26b are formed of an elastic resin material, and are in close contact with the inner wall of the cylindrical guide 30 by being pressed and elastically deformed by an inner wall of the cylindrical guide 30 during an injection operation described later.

  That is, the rotational force transmitting members 24 and 26 have a protective function for protecting the elastic tube 30 so that the elastic tube 20 does not contact the cylindrical guide 30, and the elastic tube 20 that occurs in the initial stage of fluid ejection. The turbulent movement is quickly transmitted to the inner wall of the cylindrical guide 30 and also has a rotational force transmission function for instantaneously rotating the cylindrical guide 30. Therefore, by providing the elastic tube 20 with the rotational force transmission members 24, 26, the elastic tube 20 that receives the reaction caused by the injection of the pressure fluid as a propulsive force is provided on the inner wall of the cylindrical guide 30. It is possible to perform a stable rotational force transmission through the contact, and the cylindrical guide 30 can be rotated synchronously. Furthermore, the rotational force transmitting members 24 and 26 elastically absorb the impact (rapid reaction) of the wave of the pressure fluid that bounces off the workpiece in the cleaning processing operation in which the pressure fluid is ejected from the tip of the elastic tube 20. It also has an impact mitigating function that can provide a cushioning effect that can be relaxed or keep the rotating elastic tube in close contact with the cylindrical guide 30 away from the rotating track.

  The inner diameter of the elastic tube 20 is smaller than the outer diameter of the fitting portion 62 of the fixing member 60 and has a plurality of engaging protrusions on the outer periphery. Therefore, the upstream end portion 20a of the elastic tube 20 is pressed into the fitting portion 62 of the fixing member 60 in a diameter-enlarged state, thereby closely contacting the fitting portion 62 and preventing fluid leakage.

  Further, the fixing member 60 has a threaded portion 64 that is coupled to a pipe line or the like to which pressure fluid is supplied. Examples of the member into which the screw portion 64 is screwed include an attachment member provided in a pressure fluid supply system, an air gun, a cleaning gun, or a cleaning unit in which a plurality of mounting portions are provided in parallel.

  The cylindrical guide 30 includes a cylindrical small-diameter portion 32 supported by the rotation support portion 50, a tapered guide portion 34 inclined from the small-diameter portion 32 with respect to an axis (center line) at a predetermined angle θ, and a guide portion. And a large-diameter portion 36 having a cylindrical shape that is formed so as to cover the front end side opening of 34. A space 38 through which the elastic tube 20 is inserted is formed on the inner periphery of the cylindrical guide 30. The space 38 forms a tapered space for allowing the elastic tube 20 to be elastically deformed during fluid ejection.

  The inclination angle θ of the guide portion 34 can be arbitrarily set according to the degree of bending of the elastic tube 20. The large-diameter portion 36 functions as a restricting portion that restricts the swiveling position of the fluid ejection port 40, and ejects the fluid ejection port 40 when the rotational movement of the elastic tube 20 occurs due to the start of supply of the pressure fluid. It also functions as a restricting portion that restricts the injection direction so that the direction is the front (X direction).

  The small diameter portion 32 of the cylindrical guide 30 faces the fitting portion 24 a of the rotational force transmission member 24, and the small diameter side guide portion 34 a faces the elastic deformation portion 24 b of the rotational force transmission member 24. The large-diameter side guide portion 34 b of the cylindrical guide 30 faces the fitting portion 26 a of the rotational force transmitting member 26, and the large-diameter portion 36 faces the elastic deformation portion 26 b of the rotational force transmitting member 26.

  The rotation support unit 50 includes a bearing 52 that rotatably supports the small-diameter portion 32 of the cylindrical guide 30 and a holding member 54 that holds the bearing 52 at a position with the axis extending from the elastic tube 20 as a rotation center. . The bearing 52 has a ball bearing structure, and includes an outer ring 52a held by the holding member 54, an inner ring 52b into which the small diameter portion 32 (base end) of the cylindrical guide 30 is fitted, an outer ring 52a and an inner ring. It is comprised from the some ball | bowl 52c which rolls between 52b. Since the inner ring 52 b is fitted to the small diameter portion 32 of the cylindrical guide 30 without a gap, the inner ring 52 b rotates integrally with the small diameter portion 32.

  The bearing 52 is not limited to a ball bearing, and a bearing without a ball may be used as long as the small diameter portion 32 of the cylindrical guide 30 can be rotatably supported with low friction. .

  Here, the operation of the rotating wave nozzle 10 configured as described above will be described with reference to FIG. As shown in FIG. 3, when pressurized fluid is supplied to the fixing member 60 of the rotating wave nozzle 10, the fluid that has passed through the passage of the elastic tube 20 is ejected from the fluid ejection port 40 in the X direction. Since the elastic tube 20 is a resin tube having elasticity, the elastic tube 20 bends so as to bend in the radial direction (outside) due to the reaction of the jet ejected from the fluid ejection port 40.

  In this initial operation, the elastic tube 20 is bent in the opposite direction by the injection force of the fluid injection port 40 directed in either of the radial directions (outside) due to the bending of the elastic tube 20, and is bent in the opposite direction. appear. This vibration does not become a regular swinging motion due to slight twisting, accuracy, and material non-uniformity caused by gravity and the elastic tube 20 having a round cylindrical shape. It is an irregular movement that changes or sometimes makes a circular motion.

  At this time, the elastic tube 20 bends and repeats a change from an S shape to an inverted S shape. Compared to the fact that the injection force of the fluid injection port 40, which is the driving force for this movement, always moves first and has a large amplitude, the vicinity of the middle portion in the longitudinal direction moves so as to follow and has a small amplitude that does not have a driving force. Become. In this embodiment, the fluid ejection port 40 of the elastic tube 20 as described above amplifies the irregular turning motion, and first, the elastic deformation portion 26b of the rotational force transmitting member 26 provided near the tip of the elastic tube 20 is used. Approaches and reaches the inner wall of the large-diameter portion 36 of the cylindrical guide 30 and comes into close contact therewith. Then, the rotational force transmitting member 26 transmits the direction of the force due to the change in the collision angle caused by the irregular movement of the elastic tube 20 to the inner wall of the large-diameter portion 36 of the cylindrical guide 30. Convert to rotational motion. In addition, as operation | movement when this rotational force transmission member 26 closely_contact | adheres to the inner wall of the large diameter part 36 of the cylindrical guide 30, when the fitting part 26a and the elastic deformation part 26b contact simultaneously, or the joint part 26a or In some cases, both of the elastically deformable portions 26b come into close contact with each other, and the contact operation of the rotational force transmitting member 26 depends on the contact of the inner wall of the large diameter portion 36 of the cylindrical guide 30 and the shape of the close contact portion. Change.

  Next, the elastically deformable portion 24 b of the rotational force transmitting member 24 provided at the intermediate portion in the longitudinal direction approaches, reaches, and comes into close contact with the inner wall of the small diameter portion 32 of the cylindrical guide 30. Then, the rotational force transmitting member 26 transmits the change in the angle at which the force is applied at the intermediate portion of the elastic tube 20 caused by the S-shaped deformation operation of the elastic tube 20 to the inner wall of the small diameter portion 32 of the cylindrical guide 30. Then, the rotational movement of the cylindrical guide 30 is converted. The operation when the rotational force transmitting member 24 comes into close contact with the inner wall of the small diameter portion 32 of the cylindrical guide 30 is the same as that of the rotational force transmitting member 26, or the fitting portion 24a and the elastic deformation portion 24b are simultaneously or After either the joint portion 24a or the elastic deformation portion 24b comes into contact with the tip, both come into close contact.

  Further, compared to the rotational force transmitting member 26 that moves rapidly, the vicinity of the rotational force transmitting member 24 in the middle portion of the elastic tube 20 gradually amplifies the rotational radius after the rotational force transmitting member 26 is substantially fixed, and the cylindrical guide In addition to the purpose of contacting the inner wall of the small-diameter portion 32 of 30 and further stabilizing the rotation, it also has the role of separating and reducing the pressing force applied only to the rotational force transmitting member 26.

  The rotational force obtained by the elastic tube 20 can be efficiently transmitted to the cylindrical guide 30 by the rotational force transmitting members 24 and 26 provided at two locations of the elastic tube 20 being in close contact with the inner wall of the cylindrical guide 30. become. As a result, both the elastic tube 20 and the cylindrical guide 30 can perform a stable and periodic rotation.

  The deformation state of the elastic tube 20 that performs such a rotation operation is a spiral S-shape or a reverse S-shape while rotating in a certain direction from the above-mentioned movement that irregularly changes from the S-shape to the reverse S-shape. Change. This is because the rotational force transmitting member 24 arrives at the inner wall of the large-diameter portion 36 of the cylindrical guide 30 and comes into close contact with it to start the transmission of the rotation. This is due to a time delay that occurs when rotating, and the degree of deformation varies depending on the strength, thickness, jet speed, type of fluid to be jetted, and the like.

  Therefore, the rotating wave nozzle 10 rotates the cylindrical guide 30 while maintaining the state where the rotational force transmitting members 24 and 26 are in close contact with the inner wall of the cylindrical guide 30 by the deformation operation of the elastic tube 20 described above. There is no generation of friction between the elastic tube 20 and the cylindrical guide 30 due to the sliding operation, and the elastic tube 20 can be prevented from being worn and durability can be improved. For this reason, the life of the elastic tube 20 can be greatly extended, and the elastic tube 20 and the cylindrical guide 30 are less likely to generate wear powder, so that the wear powder adheres to the product sprayed with fluid or wear powder. It is also possible to prevent the occurrence of scratches due to. Further, since the frictional resistance received by the elastic tube 20 is small and there is no sudden twisting or returning, and an appropriate centrifugal force is applied, the tip of the elastic tube 20 smoothly moves along the inner circumference of the cylindrical guide 30. Can be made.

  Further, due to the close contact operation accompanied by the elastic deformation of the rotational force transmitting members 24 and 26, the turbulent movement of the elastic tube 20 occurring in the initial stage at the time of fluid ejection is quickly transmitted to the inner wall of the cylindrical guide 30 to form a cylindrical shape. The guide 30 can be rotated synchronously.

  In addition, the cylindrical guide 30 supported by the bearing 52 guides the elastic tube 20 so that the fluid ejection port 40 repeats a circular orbit having a certain radius while rotating together with the elastic tube 20. Since the fluid ejected from the rotating fluid ejection port 40 is ejected in a spiral shape, the fluid of the pressure fluid is ejected in the X direction so as to trace a constant circular orbit. As described above, since the cylindrical guide 30 is rotated, the frictional resistance received by the elastic tube 20 is small, there is no sudden twist or return, and an appropriate centrifugal force is applied. The mouth 40 can be smoothly circularly moved along the inner periphery of the cylindrical guide 30.

  Further, in the rotational wave nozzle 10, since the reaction of the injection accompanying the elastic deformation of the elastic tube 20 is transmitted via the rotational force transmission members 24 and 26, the cylindrical guide 30 is provided with the rotational force transmission members 24 and 26. Since the frictional resistance of the rotational force transmitting members 24, 26 or the cylindrical guide 30 is reduced by rotating together with the elastic tube 20 by contact with the elastic tube 20, the structure is such that abrasion powder is not easily generated.

  Further, in the rotational wave nozzle 10, the rotational force transmitting members 24 and 26 are in close contact with the inner wall of the cylindrical guide 30, so that the turbulent movement of the elastic tube 20 that occurs at the initial stage of fluid ejection can be quickly detected. It can be transmitted to the inner wall of 30 and rotated. Further, since the rotational force transmitting members 24 and 26 are not only protected for the elastic tube 20 but also are in close contact with the inner wall of the cylindrical guide 30, stable force transmission is performed and the cylindrical guide 30 can be rotated synchronously. it can. As a result, the rotating wave nozzle 10 can stably rotate from low-speed rotation to high-speed rotation regardless of the strength of the wind speed, so that a stable effect can be obtained without any processing unevenness even in cleaning, draining and dust removal operations. It is done.

  On the other hand, since the elastic tube 20 has an upstream end (fixed end) 20a fitted and fixed to the fixing member 60, there is friction between the elastic tube 20 and the cylindrical guide 30 when the fluid ejection port 40 rotates. A twisting phenomenon occurs between the upstream end 20a and the downstream end (free end) 20b. However, in the present embodiment, since the cylindrical guide 30 is rotatably supported, the inner wall of the cylindrical guide 30 rotates relative to the outer periphery of the rotational force transmitting members 24 and 26.

  Therefore, even if a twisting phenomenon due to friction with the cylindrical guide 30 occurs in the elastic tube 20, the elastically deforming portions 24b and 26b of the rotational force transmitting member are deformed and absorb the force, so that a large impact or force is applied. Furthermore, wear and rotation disturbance due to this are also prevented. Durability can be greatly enhanced by this mechanism.

  As described above, the rotational force transmitting members 24 and 26 are efficient, durable, have a stable force transmission structure and a protective function, and can obtain a stable rotational wave from low speed rotation to high speed rotation. Therefore, for example, even for a work processing of a work having deep dents and gaps, which has been impossible in the past, stable injection waves can be generated, so that the processable area is widened and processed. It can also contribute to shortening the time.

  As a variation of the rotational force transmitting members 24 and 26, shock absorption is achieved by interposing a soft sponge material or the like between the elastic deformation portions 24b and 26b formed in the above-described taper shape and the outer periphery of the elastic tube 20. It is also possible to provide a structure that further enhances protection from splashes of dust, liquid, etc. (prevention of dust, dirt, etc.).

  Further, the inner diameters of the fitting portions 24a, 26a of the rotational force transmitting members 24, 26 are made larger than the outer diameter of the elastic tube 20, so that the rotational force transmitting members 24, 26 can be easily rotated. A configuration in which a resin ring for restricting movement is provided before and after (longitudinal direction) the mounting portion on the outer periphery of 20 is also possible. For example, in order to enable use in an atmosphere such as heat resistance, acid resistance, alkali resistance, etc., when the elastic tube 20 can be used only with a softer material, the outer periphery of the elastic tube 20 has chemical resistance. An elastic tube that is relatively weak against wear is provided by allowing the rotational force transmitting members 24 and 26 to be loosely fitted to the elastic tube 20 to be movable in the axial direction after being reinforced with a coating agent or the like. It is also possible to protect the hub 20 from operations such as frictional resistance, twisting, and return of twisting.

  The configurations shown in FIGS. 1 to 3 are basic configurations of the present invention, and it is needless to say that other configurations may be added to the configuration described above.

  Here, a modified example will be described. FIG. 4 is a perspective view showing the configuration of the first modification. FIG. 5 is a longitudinal sectional view of the first modification. 4 and 5, the same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 4 and 5, the rotation support portion 70 of Modification 1 is slidably attached to a metal stay 72 such as stainless steel formed in an L shape and a horizontal portion 72 a of the stay 72. And a metal belt 76 having both ends coupled to the pair of fastening portions 74. A fixing member 60 is inserted into the vertical portion 72 b of the stay 72 and is fixed to the fixing member 60 by a nut 61. Therefore, the stay 72 is mounted between the upstream end (fixed end) 20 a of the elastic tube 20 and the bearing 50.

  The metal belt 76 is mounted in an inverted U shape so as to be wound around the outer periphery of the outer ring 52 b of the bearing 52. Therefore, when the distance between the pair of fastening portions 74 is narrowed by tightening the screws 78, the metal belt 76 increases the clamping force with respect to the outer periphery of the outer ring 52b. Further, the pair of fastening portions 74 move in a direction away from each other by loosening the screws 78 and relax the clamping force of the metal belt 76. As a result, the fastening portion 74 can move along the horizontal portion 72 a of the stay 72.

  Therefore, the cylindrical guide 30 supported by the bearing 52 can be moved in the X direction by sliding the fastening portion 74 and the metal belt 76 in the X direction, so that the axial direction of the cylindrical guide 30 with respect to the elastic tube 20 It is possible to adjust the relative position in the (X direction). Therefore, the degree of bending of the elastic tube 20 is adjusted by adjusting the contact position between the rotational force transmitting members 24 and 26 provided on the elastic tube 20 and the inner wall of the cylindrical guide 30 according to the nature of the fluid (temperature, viscosity, etc.). By changing the above, it becomes possible to keep the wave of the fluid ejected from the fluid ejection port 40 favorable.

  Of course, in the configuration of the first modification, the same effect as that of the first embodiment can be obtained.

  FIG. 6 is a perspective view showing the configuration of the second modification. FIG. 7 is a longitudinal sectional view of the second modification. 6 and 7, the same parts as those in the above-described embodiment and modification 1 are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 6 and 7, the cylindrical guide 30 of Modification 2 has an inner wall that is not circular but is formed in a polygonal shape (for example, a hexagonal shape, an octagonal shape, or a dodecagonal shape) 80. Therefore, the rotational force transmitting members 24 and 26 provided on the elastic tube 20 are held in close contact with the corner portion 82 formed on the inner wall of the cylindrical guide 30 and transmit the rotational force to the corner portion 82. Therefore, the fluttering of the elastic tube 20 that occurs when the fluid that has passed through the elastic tube 20 is ejected in the X direction from the fluid ejection port 40 is suppressed by the corner portion 82, and the fluttering (vibration) of the elastic tube 20 is achieved in a short time. The wave of the fluid that converges and is ejected from the fluid ejection port 40 is quickly stabilized.

  Therefore, also in the configuration of the second modification, the same effect as in the first embodiment can be obtained.

  FIG. 8 is a longitudinal sectional view showing the configuration of the third modification. In FIG. 8, the same parts as those in the above-described embodiment and the first and second modifications are designated by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 8, the rotation support portion 90 of Modification 3 is slidable on a stay 92 made of metal such as stainless steel and a pair of horizontal portions 92 a and 92 b of the stay 92. It has a pair of attached fastening portions 74 and a metal belt 76 having both ends connected to the pair of fastening portions 74. A fixing member 60 is inserted through the vertical portion 92 c of the stay 92, and is fixed to the fixing member 60 by a nut 61. Thus, since the bearing 52 is supported from above and below by the pair of horizontal portions 92a and 92b, the bearing 52 is stable even when the reaction generated when the high-pressure fluid is ejected from the fluid ejection port 40 in the X direction is increased. Therefore, the wave of the fluid ejected from the fluid ejection port 40 is stabilized. Therefore, also in the configuration of the third modification, the same effect as that of the first embodiment can be obtained.

  The metal belt 76 is mounted in an inverted U shape so as to straddle the pair of horizontal portions 92 a and 92 b of the stay 92 so as to be wound around the outer periphery of the outer ring 52 b of the bearing 52. Therefore, when the distance between the pair of fastening portions 74 is narrowed by tightening the screws 78, the metal belt 76 increases the clamping force with respect to the outer periphery of the outer ring 52b. In addition, the pair of fastening portions 74 can move along the horizontal portion 72 a of the stay 72 by loosening the screws 78 to relax the clamping force of the metal belt 76.

  Therefore, the cylindrical guide 30 supported by the bearing 52 can be stably moved in the X direction by sliding the fastening portion 74 and the metal belt 76 in the X direction along the pair of horizontal portions 92a and 92b arranged vertically. Since it can be moved, the relative position in the axial direction (X direction) of the cylindrical guide 30 with respect to the elastic tube 20 can be adjusted.

  FIG. 9 is a longitudinal sectional view showing the configuration of the fourth modification. In FIG. 9, the same parts as those in the above embodiment and the first to third modifications are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 9, the rotation support portion 100 of Modification 4 includes an L-shaped metal stay 102 such as stainless steel and a fastening portion 104 provided at the tip of the horizontal portion 102 a of the stay 102. And a clamp plate 106 disposed so as to face the fastening portion 104, and an adjustment bolt 108 inserted between the fastening portion 104 and the clamp plate 106. Further, the vertical portion 102 b of the stay 102 is fixed to the fixing member 60.

  The fastening portion 104 holds one side (the left side in FIG. 9) of the outer ring 52b of the bearing 52 via a plate-like spacer 110, and the clamp plate 106 is tightened by a nut 112 that is screwed into the adjustment bolt 108. Sandwiches the other side (the right side in FIG. 9) of the outer ring 52b of the bearing 52. The fastening portion 104, the clamp plate 106, and the spacer 110 are provided with holes (not shown) through which the adjustment bolts 108 are inserted, and the interval between the fastening portion 104 and the clamp plate 106 is narrowed by tightening the nut 112. Thus, a clamping force in the X direction can be applied.

  Further, although the spacer 110 has an arbitrary thickness, it is possible to adjust the position of the bearing 52 in the X direction with respect to the fastening portion 104 by interposing a plurality of spacers.

  Therefore, in the fourth modification, the cylindrical guide 30 supported by the bearing 52 can be moved in the X direction by changing the number of the spacers 110, so that the axial direction (X Direction) relative position can be adjusted.

  Further, the cylindrical guide 30 is restricted from moving in the X direction with respect to the inner ring 52b of the bearing 52 by the retaining ring 33 fitted in the groove of the small diameter portion 32, so that the cylindrical guide 30 is prevented from falling off the bearing 52. Yes. Therefore, the cylindrical guide 30 is held so that the cylindrical guide 30 does not come out of the bearing 52 even when it comes into contact with a peripheral device or an object to be cleaned.

  FIG. 10 is a longitudinal sectional view showing the configuration of the fifth modification. In FIG. 10, the same parts as those in the above embodiment and the first to fourth modifications are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 10, the rotation support portion 120 of Modification 5 is provided at the end of a pair of horizontal portions 122 a and 122 b of a stay 122 made of metal such as stainless steel and a stay 122. The pair of fastening portions 104 and 105, the clamp plates 106 and 107 disposed so as to face the fastening portion 104, and the adjustment bolts inserted between the pair of fastening portions 104 and 105 and the clamp plates 106 and 107 108,109. Further, the vertical portion 122 c of the stay 122 is fixed to the fixing member 60.

  Thus, since the bearing 52 is supported from above and below by the pair of horizontal portions 122a and 122b, the bearing 52 is stable even when the reaction generated when the high-pressure fluid is ejected from the fluid ejection port 40 in the X direction is increased. Therefore, the wave of the fluid ejected from the fluid ejection port 40 is stabilized.

  Further, the fastening portions 104 and 105 sandwich one side (left side in FIG. 10) of the outer ring 52b of the bearing 52 via the plate-like spacer 110 at two places, and a nut 112 that is screwed to the adjustment bolt 108. The clamp plates 106 and 107 clamp the other side (right side in FIG. 10) of the outer ring 52b of the bearing 52 at two locations, upper and lower. The fastening portions 104 and 105, the clamp plates 106 and 107, and the spacers 110 and 111 are provided with holes (not shown) through which the adjustment bolts 108 are inserted. A clamping force in the X direction can be applied so as to narrow the distance from the clamping plate 106.

  Moreover, although the spacers 110 and 111 have arbitrary thickness, it is possible to adjust the position of the bearing 52 in the X direction with respect to the fastening portion 104 by interposing a plurality of spacers.

  Therefore, in the fourth modification, the cylindrical guide 30 supported by the bearing 52 can be moved in the X direction by changing the number of the spacers 110 and 111, so the axial direction of the cylindrical guide 30 with respect to the elastic tube 20 It is possible to adjust the relative position in the (X direction).

  FIG. 11 is a perspective view showing the configuration of the sixth modification. FIG. 12 is a longitudinal sectional view of Modification 6. In FIG. 11 and FIG. 12, the same parts as those in the above embodiment and the first to fifth modifications are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIGS. 11 and 12, the rotation support portion 130 of Modification 6 is configured by a cover member 132 formed in a cylindrical shape that houses the cylindrical guide 30. The cover member 132 is formed on the small-diameter fitting portion 134 into which the fixing member 60 is fitted, the tapered portion 136 having a diameter larger than that of the small-diameter fitting portion 134, and the distal end side of the tapered portion 136, and is a large housing that houses the bearing 52. A diameter fitting portion 138 and a guide cover portion 140 formed so as to cover the cylindrical guide 30 are integrally formed.

  Inside the large-diameter fitting portion 138, a step portion 142 into which the outer ring 52b of the bearing 52 is fitted is provided. The annular stopper 146 restricts the movement of the outlet side end of the outer ring 52 b of the bearing 52 by a screw 144 screwed from the outer periphery of the large-diameter fitting portion 138.

  Since the rotation support part 130 is the structure which hold | maintains the bearing 52 in the state which accommodated the elastic tube 20, the cylindrical guide 30, and the bearing 52, it can protect the elastic tube 20, the cylindrical guide 30, and the bearing 52 from the outside. For example, the rotating portion can be protected from the rebound of the jetted fluid, the surrounding atmosphere, solar heat, and cold air in a cold region. That is, by providing the rotation support part 130, for example, the rotating part is protected from the rebound of the fluid accompanied by the injected fluid and dust, sewage, sand, mud, etc., and the nozzle main body caused by the contact with the rotating part is caused. It is possible to obtain effects such as prevention of fire due to breakage, heat generation due to friction, or contact with the human body.

  The rotating wave nozzle of the present invention is configured to eject all fluids such as gas, liquid, gas / liquid mixture, gas / powder mixture, etc. as the fluid to be ejected, and is not limited by the fluid. .

  In addition, the rotating wave nozzle of the present invention includes draining, rapid drying, dust removal, cleaning work, spraying of fine particle liquid or mixed fluid of powder and gas, fire extinguishing work, etc., massage requiring low frequency vibration, It can be used for many purposes such as tanning of resin and cloth leather.

It is a block diagram which shows one Example of the rotation wave nozzle by this invention. It is a longitudinal cross-sectional view which shows a rotation wave nozzle. 4 is a longitudinal sectional view showing the operation of the rotating wave nozzle 10. FIG. 10 is a perspective view showing a configuration of Modification 1. FIG. It is a longitudinal cross-sectional view of Modification 1. 12 is a perspective view showing a configuration of Modification 2. FIG. It is a longitudinal cross-sectional view of Modification 2. 10 is a longitudinal sectional view showing the configuration of Modification 3. FIG. 10 is a longitudinal sectional view showing a configuration of Modification 4. FIG. 10 is a longitudinal sectional view showing a configuration of Modification 5. FIG. 10 is a perspective view showing a configuration of Modification 6. FIG. It is a longitudinal cross-sectional view of Modification 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotating wave nozzle 20 Elastic tube 24,26 Rotational force transmission member 30 Cylindrical guide 32 Small diameter part 34 Guide part 36 Large diameter part 38 Space 40 Fluid injection port 50,70,90,100,130 Rotation support part 52 Bearing 54 Holding Member 60 Fixing member 72, 92, 102, 122 Stay 74 Fastening portion 76 Metal belt 80 Polygon 110, 111 Spacer 104, 105 Fastening portion 106, 107 Clamp plate 108, 109 Adjustment bolt 132 Cover member 134 Small diameter fitting portion 136 Taper 138 Large diameter fitting part 140 Guide cover part

Claims (8)

In a rotating wave nozzle that supplies pressurized fluid to an elastic tube inserted through a cylindrical guide and rotates the fluid injection port by the action of a jet injected from a fluid injection port at the tip of the elastic tube.
A rotating wave nozzle comprising a rotation support portion for rotatably supporting the cylindrical guide. The rotation support part is
A bearing that rotatably supports the proximal end of the cylindrical guide;
A holding member that holds the bearing at a position about the axis of rotation of the elastic tube as a rotation center;
The rotational wave nozzle according to claim 1, wherein   The rotary wave nozzle according to claim 2, wherein the holding member is mounted between a fixed end of the elastic tube and the bearing.   The rotating wave nozzle according to claim 2, wherein the holding member is a cover member formed in a cylindrical shape that houses the cylindrical guide.   2. The rotating wave nozzle according to claim 1, wherein the cylindrical guide is formed in a tapered shape in which a proximal end of an inner wall with which the elastic tube abuts has a small diameter and a distal end has a large diameter.   The rotational wave nozzle according to claim 5, wherein the elastic tube includes a first rotational force transmission member that abuts on an upstream inner wall of the cylindrical guide.   The rotational wave nozzle according to claim 5, wherein the elastic tube includes a second rotational force transmission member that abuts against a downstream inner wall of the cylindrical guide. The bearing includes an outer ring held by the holding member, an inner ring to which a proximal end of the cylindrical guide is fitted, and a plurality of balls that roll between the outer ring and the inner ring. The rotational wave nozzle according to claim 2.

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