JP2015051388A - Fluid jet nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid jet nozzle which can achieve weight reduction, miniaturization, simplification, and cost reduction.SOLUTION: A fluid jet nozzle 11 includes: a nozzle body 13 which consists of an integrated flexible cylindrical body including a base end-side cylindrical part 30 and a flat cylindrical part 31 extending from the cylindrical part 30 to a tip position; and an annular body 15 which is fitted to an outer peripheral part of the flat cylindrical part 31 so as to be movable along an axial direction of the flat cylindrical part 31. A fluid introduced into the cylindrical part 30 and passing through the inside of the nozzle body 13 is jetted outside from a jet port 33 at a tip of the flat cylindrical part 31, whereby a swing part 55 comprising the flat cylindrical part 31 and the annular body 15 is made to perform swinging movement in a flat direction of the flat cylindrical part 31. The fluid jet nozzle 11 has not a member, which restricts the swinging movement, around the swing part 55.

Description

  The present invention relates to a fluid ejection nozzle.

  Some fluid ejection nozzles that have a cylindrical shape and allow fluid to be ejected to the inner peripheral side have a flat portion having flexibility formed in an intermediate range in the axial direction. In this fluid ejection nozzle, the flat part bends in the flat direction due to the reaction force caused by the fluid ejection, and the swinging angle is adjusted by moving the guide provided around it back and forth. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 10-286494

  By the way, in the above-described fluid ejection gun, since a guide for adjusting the swing angle is necessary, there is a problem that the weight is heavy, the size is large, the structure is complicated, and the manufacturing cost is high.

  Accordingly, an object of the present invention is to provide a fluid ejection nozzle that can be reduced in weight, size, simplification, and cost.

  In order to achieve the above object, the invention according to claim 1 is an integrated flexible cylindrical body having a cylindrical portion on the base end side and a flat cylindrical portion extending from the cylindrical portion to the distal end position. A nozzle body, and an annular body that is mounted on the outer peripheral portion of the flat cylindrical portion so as to be movable along the axial direction of the flat cylindrical portion. The fluid passing through the inside is ejected from the jet outlet at the tip of the flat cylindrical portion to the outside, and the swinging portion composed of the flat cylindrical portion and the annular body is swung in the flat direction of the flat cylindrical portion. A fluid ejection nozzle that does not have a member that restricts the swing motion around the swing portion.

  The invention according to claim 2 is characterized in that an outer peripheral length of the flat cylindrical portion in a natural state is longer than an inner peripheral length of the annular body in a natural state.

  According to the first aspect of the present invention, the fluid introduced into the cylindrical portion and passing through the inside of the nozzle body is ejected from the outlet of the tip of the flat cylindrical portion to the outside, thereby allowing the fluid from the flat cylindrical portion and the annular body. The swinging part is swung in the flat direction of the flat cylindrical part. Thereby, the fluid can be ejected in a wide range. Then, when the annular body mounted on the outer peripheral portion of the flat tubular portion is moved in the axial direction of the flat tubular portion, the swing angle is reduced if the annular body is positioned on the proximal end side, and the annular body is If it is located on the side, the swing angle becomes large. As a result, the swing angle can be adjusted without a guide. That is, it becomes a structure which does not have the member which restrict | limits a swing motion around the swing part. Therefore, weight reduction, size reduction, simplification, and cost reduction can be achieved.

  According to the second aspect of the present invention, since the outer peripheral length of the flat cylindrical portion in the natural state is longer than the inner peripheral length of the annular member in the natural state, the flat cylindrical portion is formed into the annular member. If fitted, the annular body can be held in the flat cylindrical portion by a frictional force generated between them. Moreover, the annular body can be moved in the axial direction with respect to the flat cylindrical portion by applying a force exceeding the frictional force. Therefore, the structure in which the annular body is movably attached to the flat cylindrical portion can also be reduced in weight, size, simplification, and cost.

The fluid ejection nozzle which concerns on one Embodiment of this invention is shown, (a) is a top view, (b) is a side view, (c) is a front view. It is a side view which shows the state which mounted | wore the air gun with the fluid ejection nozzle which concerns on one Embodiment of this invention. It is a top view for demonstrating the swing motion of the fluid ejection nozzle which concerns on one Embodiment of this invention, Comprising: (a) shows a state with a small swing angle, (b) shows a state with a large swing angle. Is.

  A fluid ejection nozzle according to an embodiment of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the fluid ejection nozzle 11 according to the present embodiment includes an attachment member 12, a nozzle body 13, a connecting member 14, and an annular body 15.

  The attachment member 12 is a metal component, and is provided with a screw shaft portion 21 having a male screw 20 formed on the outer peripheral portion on one end side in the axial direction. Further, the attachment member 12 is provided with a cylindrical attachment portion 22 on the other axial end side. Further, the attachment member 12 is provided with a hexagonal tool engaging portion 23 at an axially intermediate portion. An internal flow path 24 extending along the axial direction is formed at the radial center of the screw shaft portion 21 and the tool engagement portion 23, and the internal flow path 24 opens to the inside of the attachment portion 22. ing.

  The nozzle main body 13 has a cylindrical cylindrical portion 30 on one end side in the length direction and a flat-shaped flat cylindrical portion 31 extending from the cylindrical portion 30 to the other end position in the length direction. It consists of a flexible cylindrical body. The nozzle body 13 has the same length direction and axial direction. The cylindrical nozzle body 13 is an internal flow path 32 whose inner side penetrates in the axial direction. The flat cylindrical portion 31 has a width in one direction perpendicular to the axial direction (vertical direction in FIG. 1A) smaller than a width in a direction perpendicular to the one direction (vertical direction in FIG. 1B). Has been. The flat cylindrical portion 31 has a narrower side width smaller than the outer diameter of the cylindrical portion 30 and a wider side width larger than the outer diameter of the cylindrical portion 30.

  When the nozzle body 13 having such a shape is manufactured, a tube material having a constant cylindrical diameter made of a synthetic resin having flexibility such as nylon, Teflon (registered trademark), polyurethane, and polypropylene is prepared. Is compressed while being sandwiched between parallel opposed surfaces of a pair of pressure plates. This compression is performed except for a portion that becomes the cylindrical portion 30 of the tube material. By the compression while heating, the tube material is plastically deformed to form the flat cylindrical portion 31.

  In the nozzle body 13, the rigidity of the flat cylindrical portion 31 in the flat direction (in the narrow direction) is perpendicular to the flat direction of the flat cylindrical portion 31 (in the wide direction) and the rigidity of the cylindrical portion 30. And the lowest in the nozzle body 13. The nozzle body 13 is entirely linear in a state where no force is received, and when the force is received from this state, the flat cylindrical portion 31 is easily deformed in the flat direction.

  The connecting member 14 has a cylindrical shape, and the cylindrical portion 30 of the nozzle body 13 is fitted inside the connecting member 14, and the outside thereof is fitted to the cylindrical mounting portion 22 of the mounting member 12. . Thereby, the connecting member 14 fixes the cylindrical portion 30 of the nozzle body 13 to the mounting member 12. The connecting member 14 is formed of a cylindrical body such as a rubber tube having airtightness, and is in close contact with the cylindrical portion 30 of the nozzle body 13 and closely with the mounting portion 22 of the mounting member 12 to seal these gaps. To do. If necessary, an adhesive is applied between the connecting member 14 and the cylindrical portion 30 of the nozzle body 13, and an adhesive is also applied between the connecting member 14 and the mounting portion 22 as necessary.

  In a state where the nozzle main body 13 is attached to the attachment member 12 via the connecting member 14, the internal flow path 24 of the attachment member 12 and the internal flow path 32 of the nozzle main body 13 communicate with each other. The fluid is introduced into the internal flow path 32 of the nozzle body 13 from the cylindrical portion 30 side, and thus the cylindrical portion 30 is disposed on the upstream side in the fluid flow direction. That is, the cylindrical portion 30 is the proximal end side of the nozzle body 13, and the end portion of the flat tubular portion 31 opposite to the cylindrical portion 30 is the distal end side of the nozzle body 13. Therefore, the flat cylindrical portion 31 extends from the cylindrical portion 30 on the proximal end side to the distal end position in the nozzle body 13. In the nozzle body 13, an end portion of the flat cylindrical portion 31 opposite to the cylindrical portion 30 is a free end, and this portion serves as a jet outlet 33 that ejects the fluid that has passed through the internal flow path 32. Yes.

  The annular body 15 is a cylindrical body that can be easily deformed. The annular body 15 is made of a cylindrical tube material made of a synthetic resin similar to the nozzle body 13 and has a cylindrical shape in a natural state (a state before assembly) before being attached to the nozzle body 13. The outer peripheral length of the flat cylindrical portion 31 of the nozzle body 13 in the natural state is longer than the inner peripheral length of the annular body 15 in the natural state by the tightening allowance. Here, the outer peripheral length is the length on the axis orthogonal surface of the outer peripheral surface, and the inner peripheral length is the length on the axis orthogonal surface of the inner peripheral surface. Further, the axial length of the annular body 15 is significantly shorter than the axial length of the flat cylindrical portion 31.

  The annular body 15 is fitted with the flat cylindrical portion 31 of the nozzle body 13 on the inner side. At this time, the outer peripheral length of the flat cylindrical portion 31 in the natural state and the natural state of the annular body 15 are determined. At least one of the difference between the inner circumferential length and the flat cylindrical portion 31 and the annular body 15 is elastically deformed to allow this fitting. When the flat cylindrical portion 31 is elastically deformed, the outer peripheral portion is deformed in a contracting direction. When the annular body 15 is elastically deformed, the inner peripheral portion is deformed. Further, the annular body 15 is applied to the flat cylindrical portion 31 by the frictional force between the annular body 15 and the flat cylindrical portion 31 generated by the elastic force of at least one of the annular body 15 and the flat cylindrical portion 31. Stopped (ie fixed). Since the annular body 15 is easily deformable, the flat cylindrical portion 31 is fitted inside to form a flat shape following the external shape of the flat cylindrical portion 31.

  When an external force greater than a predetermined value exceeding the frictional force is applied between the annular body 15 and the flat cylindrical portion 31 in the axial direction, at least one of the annular body 15 and the flat cylindrical portion 31 is elastically deformed. , Move relative to the axial direction. That is, the annular body 15 is mounted on the outer peripheral portion of the flat cylindrical portion 31 so as to be movable along the axial direction of the flat cylindrical portion 31. In addition, when moving the annular body 15 with respect to the flat cylindrical part 31, it is good to pull the flat cylindrical part 31 and to extend to an axial direction. If it does in this way, the flat cylindrical part 31 will be in the state in which outer peripheral length is short, and, thereby, the annular body 15 will be in the state which is easy to move.

  It should be noted that the difference between the outer peripheral length of the flat cylindrical portion 31 in the natural state and the inner peripheral length of the annular body 15 in the natural state is that the internal flow path 32 does not move even if the flat cylindrical portion 31 is elastically deformed in the reduction direction. A sufficient flow path area can be secured without being blocked, the annular body 15 can be satisfactorily maintained in a stopped state with respect to the flat cylindrical portion 31, and the annular body 15 can be manually turned into the flat cylindrical portion 31. On the other hand, it is set so that it can move in the axial direction.

  The fluid ejection nozzle 11 having the above configuration is used by being attached to an air gun 40 as shown in FIG. 2, for example. The air gun 40 ejects compressed air as a fluid, and is gripped by an operator's hand during use, and extends forward from the grip portion 41 while being inclined with respect to the grip portion 41 from one end side of the grip portion 41. A gun body 43 having a body portion 42 to be taken out is provided.

  The gun body 43 is provided with a connecting portion 46 connected to, for example, an air compressor 45 as a gas supply source at the end of the grip portion 41 opposite to the body portion 42. When the air compressor 45 is connected to the connecting portion 46, the internal flow path 47 of the gun body 43 communicates with the air compressor 45. The fluid jet nozzle 11 is screwed into the gun main body 43 at the distal end portion of the body portion 42 opposite to the grip portion 41 at the male screw 20. As a result, the internal flow path 24 of the attachment member 12 of the fluid ejection nozzle 11 communicates with the internal flow path 47 of the gun body 43.

  The gun main body 43 is provided with a lever 50 that rotates about a rotation shaft 49 provided at an upper position of the body portion 42. The lever 50 extends along the grip portion 41 on the front side of the grip portion 41. Are arranged side by side. The grip portion 41 is provided with a rod 51 that extends in the direction of the lever 50 and contacts the lever 50 so as to be movable in the extending direction. The rod 51 opens and closes an on-off valve 52 built in the grip portion 41, and is urged so as to protrude toward the lever 50 by a spring (not shown).

  The on-off valve 52 is operated so that the lever 50 swings toward the grip part 41, and when the rod 51 is pushed into the grip part 41 from the most protruding position, the internal channel 47 is moved by the movement of the rod 51. And the introduction of compressed air from the air compressor 45 into the internal flow paths 24 and 32 of the fluid ejection nozzle 11 is allowed. On the other hand, the opening / closing valve 52 closes the internal flow path 47 in the gun body 43 when the swing operation to the grip portion 41 side of the lever 50 is released and the rod 51 is positioned at the protruding position by a spring (not shown). Thus, the introduction of compressed air from the air compressor 45 into the internal flow paths 24 and 32 of the fluid ejection nozzle 11 is restricted.

  When the lever 50 of the air gun 40 is operated, compressed air from the air compressor 45 causes the internal flow path 47 of the air gun 40, the internal flow path 24 of the mounting member 12 of the fluid ejection nozzle 11, and the nozzle body 13 of the fluid ejection nozzle 11. Are passed through the internal flow path 32 in this order, and ejected to the outside from the ejection port 33 of the nozzle body 13. At this time, the compressed air is introduced into the cylindrical portion 30 in the nozzle body 13, passes through the inside of the nozzle body 13, and is ejected to the outside from the ejection port 33 at the distal end portion of the flat tubular portion 31. Then, as shown in FIG. 3, due to the reaction force of the jet, the flat cylindrical portion 31 of the fluid jet nozzle 11 is cylindrically farthest from the jet port 33 while being generally curved in the flat direction having low rigidity. The reciprocating rocking is repeated centering on the end side on the part 30 side. That is, the swinging portion 55 including the flat cylindrical portion 31 and the annular body 15 attached to the flat tubular portion 31 performs a swinging motion while being bent in the flat direction around the end portion on the cylindrical portion 30 side.

  Then, the angle of the swing motion of the swing portion 55 is adjusted by the mounting position of the annular body 15 as shown in FIG. That is, as shown in FIG. 3A, when the annular body 15 is positioned on the side closer to the cylindrical portion 30 of the flat cylindrical portion 31, the distance from the center of oscillation becomes shorter and the moment due to the weight of the annular body 15 is reduced. Therefore, the angle of the swing motion of the swing portion 55 is a small angle α1. As shown in FIG. 3B, when the annular body 15 is positioned on the side close to the jet port 33 of the flat cylindrical portion 31, the distance from the swing center becomes longer and the moment due to the weight of the annular body 15 increases. Therefore, the angle of the swing motion of the swing portion 55 is a large angle α2. The more the annular body 15 is positioned on the ejection port 33 side, the greater the angle of the swing motion and the lower the frequency of the swing motion.

  Since the angle of the swinging motion of the swinging portion 55 can be changed by adjusting the position of the annular body 15 in this way, the swinging motion is restricted by contacting the swinging portion 55 around the swinging portion 55. It becomes a structure which does not have a member to do. In other words, a structure that does not require a member that restricts the swing motion required to define the angle of the swing motion of the swing portion 55 is obtained. In other words, the fluid ejection nozzle 11 has a structure in which a member other than the swinging portion 55 is not provided in a portion overlapping the swinging portion 55 in the axial direction in a linear state.

  According to the fluid ejection nozzle 11 of the present embodiment described above, the fluid that is introduced into the cylindrical portion 30 and passes through the internal flow path 32 inside the nozzle body 13 is ejected from the tip of the flat tubular portion 31. By squirting from 33 to the outside, the swinging portion 55 formed of the flat tubular portion 31 and the annular body 15 is swung in the flattening direction of the flat tubular portion 31. Thereby, the fluid can be ejected in a wide range. Then, when the annular body 15 mounted on the outer peripheral portion of the flat tubular portion 31 is moved in the axial direction of the flat tubular portion 31, the swing angle is reduced if the annular body 15 is positioned on the proximal side. If the annular body 15 is positioned on the distal end side, the swing angle is increased. As a result, the swing angle can be adjusted without a guide. In other words, the configuration is such that there is no member that restricts the swing motion around the swing portion 55. Therefore, weight reduction, size reduction, simplification, and cost reduction can be achieved.

  In addition, since the outer peripheral length of the flat tubular portion 31 in the natural state is longer than the inner peripheral length of the annular member 15 in the natural state, the flat tubular portion 31 can be fitted to the annular member 15. For example, the annular body 15 can be held in the flat cylindrical portion 31 by the frictional force generated between them. Further, the annular body 15 is moved on the flat cylindrical portion 31 by applying a force exceeding the frictional force. Accordingly, the structure in which the annular body 15 is movably mounted on the flat cylindrical portion 31 can also be reduced in weight, size, simplification, and cost. Further, since the annular body 15 is formed of a cylindrical body that can be easily deformed, if the flat cylindrical portion 31 is fitted to the annular body 15, the annular body 15 also becomes a flat shape following the shape of the flat cylindrical portion 31. . Thereby, it becomes unnecessary to form the annular body 15 in a flat shape in advance, and further cost reduction can be achieved.

  In addition to the air gun 40 that ejects compressed air, the fluid ejection nozzle 11 according to the present embodiment includes, for example, a gun that ejects other compressed gas, a gun that ejects liquid to be pumped, and a compressed fluid mixed with gas and liquid. It can be applied to the ejection nozzles of all fluid ejection guns that eject fluid, such as guns that eject water.

DESCRIPTION OF SYMBOLS 11 Fluid ejection nozzle 13 Nozzle main body 15 Annular body 30 Cylindrical part 31 Flat cylindrical part 32 Internal flow path 33 Jet outlet 55 Swing part

Claims (2)

A nozzle body formed of an integral flexible tubular body having a proximal cylindrical portion and a flat tubular portion extending from the cylindrical portion to the distal end position;
An annular body mounted on the outer peripheral portion of the flat cylindrical portion so as to be movable along the axial direction of the flat cylindrical portion;
A fluid swinging into the cylindrical part and passing through the inside of the nozzle body is ejected to the outside from a jet outlet at the tip of the flat cylindrical part, whereby a swinging part made of the flat cylindrical part and the annular body is provided. A fluid ejection nozzle that swings in a flat direction of the flat cylindrical portion;
A fluid ejection nozzle characterized by not having a member for limiting the swing motion around the swing portion.   The fluid ejection nozzle according to claim 1, wherein an outer peripheral length of the flat cylindrical portion in a natural state is longer than an inner peripheral length of the annular body in a natural state.

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