JPWO2012127647A1 - Nozzle tip member and nozzle using the same - Google Patents

Abstract

Provided is a nozzle tip member capable of adjusting the shape and arrangement of holes through which fluid is ejected easily and inexpensively without replacing the nozzle or the nozzle tip portion. A nozzle tip member that ejects fluid from an ejection hole and ejects fluid from one or more side holes provided around the ejection hole, and substantially includes a plate-like base portion and the base portion. A first nozzle member having an inner hole which is the injection hole inside the convex portion, and an opening fitted into the convex portion in the plate-like second nozzle main body portion. A second nozzle member provided with a certain through-hole, and the inner peripheral surface of the through-hole and / or the outer peripheral surface of the convex portion have one or more grooves, The second nozzle member is seated on the first nozzle member while being fitted to a portion, and the side hole is formed by the groove and the outer peripheral surface of the convex portion and / or the groove and the inner peripheral surface of the through hole. Configured. [Selection] Figure 1

Description

  The present invention relates to a nozzle tip member and a nozzle using the same, and more particularly, to a nozzle tip member or nozzle provided with a plurality of openings at the tip.

  The external mixing type air spray gun is defined in Japanese Industrial Standard as, for example, JISB 9809, and is widely used as a spray gun for general coating. In such a spray gun, the main body of atomization is formed by a paint nozzle and an air cap at the tip of the spray gun, and compressed air is sprayed from a ring-shaped slit around the paint nozzle screwed to the spray gun body. The paint which is atomized and atomized is sprayed on the object to be coated, and a coating film is formed on the surface of the object to be coated.

  In particular, the paint nozzle is formed by making the tip of the paint nozzle into a truncated cone shape, the center hole of the air cap as a frustoconical space, and a hollow frustoconical ring-shaped slit around the outer periphery of the paint nozzle so that compressed air is crossed into the paint jet flow An invention has been disclosed in which atomization is uniformly performed up to the center of the flow and the amount of paint spray can be increased (Patent Document 1).

  In an adhesive discharge device including a gun body having a nozzle in which an adhesive passage and an air delivery passage are formed, an air jet passing through a through hole inclined with respect to the longitudinal axis is discharged from the nozzle tip. What was comprised so that it might collide with the adhesive bead discharged | emitted from the exit is disclosed (patent document 2).

  As described above, the hole shape and arrangement of the nozzle tip greatly change its characteristics, and therefore the hole shape and arrangement of the tip must be appropriately designed according to the purpose.

JP-A-9-164345 Japanese Patent Laid-Open No. 2-180658

  However, since the shape and arrangement of the holes through which the fluid is ejected can be considered as an important structure that affects the characteristics, the holes are usually fixed for each nozzle. Therefore, adjusting these cannot be achieved without replacement for each nozzle. Even if the nozzle tip portion is removable from the spray body, these structures cannot be easily adjusted unless at least the entire nozzle tip portion is replaced. Further, in the conventional nozzle, the gas passage is drilled with a drill, and the drill used when drilling a plurality of elongated gas passages at an accurate position is as thin as a needle. It was difficult, for example, to break, and it was expensive.

  The present invention has been made in view of the circumstances of the above-described prior art, and the object of the present invention is to easily and inexpensively replace the nozzle or the nozzle tip portion as a whole (or as a whole) without replacing it. To provide a tip member of a nozzle capable of adjusting the shape and arrangement of the holes to be ejected.

  In view of the above-described problem, in the present invention, a nozzle tip member that ejects fluid from an ejection hole and ejects fluid from one or more side holes provided around the ejection hole, A first nozzle member having a convex portion standing upright on the first nozzle member and having a medium hole as the injection hole inside the convex portion, and a plate-like second nozzle main body portion having a through hole fitted to the convex portion. A nozzle tip member that forms and forms the side hole.

More specifically, the following can be provided.
(1) A nozzle tip member that ejects a first fluid from an ejection hole and ejects a second fluid from one or more side holes provided around the ejection hole, the plate-like base portion And a first nozzle member having a middle hole which is the injection hole inside the convex portion, and a plate-like second nozzle main body portion, A second nozzle member provided with a through hole which is an opening fitted to the convex portion, and the inner peripheral surface of the through hole and / or the outer peripheral surface of the convex portion has one or more grooves. The second nozzle member is seated on the first nozzle member while fitting the through hole to the convex portion, and the groove on the inner peripheral surface of the through hole, the outer peripheral surface of the convex portion, The tip member of the nozzle characterized by comprising the side hole can be provided.

  Here, the side hole may be a hole through which a gas (equivalent to the second fluid) such as air or an inert gas is mainly passed. On the other hand, the medium hole may be a hole through which a liquid (corresponding to the first fluid) such as a paint or an adhesive mainly passes. It is preferable that the front end opening of the medium hole is surrounded by the front end openings of the plurality of side holes. These tip openings do not need to be arranged side by side (with a pliers) on the same plane, and there may be a height difference in the injection direction. The inner hole preferably extends along the injection direction, and the side hole may extend along the same way as the inner hole, or may extend at an angle so as to draw a spiral.

(2) The nozzle tip member according to (1) above, wherein the groove is provided in a portion of the outer peripheral surface of the convex portion facing the groove on the inner peripheral surface of the through hole. Can do.

(3) A nozzle tip member that ejects the first fluid from the ejection holes and ejects the second fluid from one or more side holes provided around the ejection holes, and has a plate-like base portion And a first nozzle member having a middle hole which is the injection hole inside the convex portion, and a plate-like second nozzle main body portion, A second nozzle member provided with a through hole which is an opening fitted to the convex portion, and the inner peripheral surface of the through hole and / or the outer peripheral surface of the convex portion has one or more grooves. The second nozzle member is seated on the first nozzle member while fitting the through hole to the convex portion, and the groove on the outer peripheral surface of the convex portion, the inner peripheral surface of the through hole, The tip member of the nozzle characterized by comprising the side hole can be provided.

(4) The nozzle tip member according to (3) is provided, wherein the groove is provided in a portion of the inner peripheral surface of the through hole facing the groove on the outer peripheral surface of the convex portion. Can do.

(5) The convex portion is provided in a tapered shape having a diameter that continuously decreases from the base portion side toward the distal end side, and the side hole extends along the tapered surface of the convex portion. The nozzle tip member according to (1) or (3) above, which is provided to be inclined toward the central axis can be provided.

  Here, the side hole is fitted by one or more grooves provided on the inner peripheral surface of the second nozzle member, and an outer peripheral surface (for example, a tapered surface) that can be said to be an outer peripheral side surface of the convex portion of the first nozzle member. Sometimes prescribed. For this reason, it is sufficient for the side hole processing to substantially perform groove processing. Here, the groove is provided on the second nozzle member side, but may be provided on the outer peripheral surface (for example, a tapered surface) of the first nozzle member. Or you may provide in both. From the viewpoint of ease of working efficiency and ease of forming side holes by fitting, it is preferable to provide the first nozzle member or the second nozzle member.

(6) The tip member of the nozzle according to (5), wherein the side hole is provided to be inclined in a circumferential direction of a concentric circle centering on an axis of the middle hole. it can.

  Such an inclination may be inclined by the same angle in all the side holes, or may be different. Obviously, the inclination angle is not less than 0 and less than 90 degrees.

(7) The tip portion of the nozzle according to (1) or (3) is provided, wherein the base portion includes a base portion through hole which is a flow path opening communicating with the side hole. it can.

(8) A seal member provided between the side surface of the convex portion of the base portion and the first nozzle facing surface of the second nozzle member is further provided to seal the fluid flowing through the side hole. The nozzle tip member according to (1) or (3) above can be provided.

  Here, the seal member may be made of, for example, an elastic body such as silicon rubber, or may be made of an elastic-plastic body such as a so-called gasket.

(9) Said 2nd nozzle member is comprised by the slice body divided | segmented into plurality by the plane orthogonal to the longitudinal direction of the said internal hole, The said (1) or (3) characterized by the above-mentioned. A tip member of the nozzle can be provided.

(10) Each of the plurality of slice bodies includes the groove on an inner peripheral surface of each through hole, and the groove of each slice body is formed so that the groove size and / or the groove shape changes continuously. The tip member of the nozzle according to the above (9) can be provided.

  Here, “continuous” can mean that no discontinuity occurs between the grooves of each slice body. For example, it may mean a state where the opening of the seam of the groove of each slice body is aligned. In addition, this continuous can mean the state which does not have a level | step difference substantially in the field of mechanical engineering as well as not being discontinuous. Therefore, it goes without saying that even if there is a level difference when viewed microscopically, it is included continuously.

(11) A nozzle tip member that ejects the first fluid from the ejection holes and ejects the second fluid from one or more side holes provided around the ejection holes. And a first nozzle member having a middle hole which is the injection hole inside the convex portion, and a plate-like second nozzle main body portion, A second nozzle member provided with a through hole which is an opening fitted to the convex portion, and the inner peripheral surface of the through hole and / or the outer peripheral surface of the convex portion has one or more grooves. The second nozzle member is seated on the first nozzle member while fitting the through hole to the convex portion, and the groove on the inner peripheral surface of the through hole, the outer peripheral surface of the convex portion, A tip member comprising the side hole, a nozzle body to which the tip member is attached, and the tip member Serial and a fixing means for fixing the nozzle main body by the fixing means, the tip member can be provided a nozzle, characterized in that provided detachably with respect to the nozzle body.

(12) A nozzle tip member that ejects the first fluid from the ejection holes and ejects the second fluid from one or more side holes provided around the ejection holes. And a first nozzle member having a middle hole which is the injection hole inside the convex portion, and a plate-like second nozzle main body portion, A second nozzle member provided with a through hole which is an opening fitted to the convex portion, and the inner peripheral surface of the through hole and / or the outer peripheral surface of the convex portion has one or more grooves. The second nozzle member is seated on the first nozzle member while fitting the through hole to the convex portion, and the groove on the outer peripheral surface of the convex portion, the inner peripheral surface of the through hole, A tip member comprising the side hole, a nozzle body to which the tip member is attached, and the tip member Serial and a fixing means for fixing the nozzle main body by the fixing means, the tip member can be provided a nozzle, characterized in that provided detachably with respect to the nozzle body.

(13) The nozzle body includes a first fluid channel provided to communicate with the middle hole of the tip member, and a second fluid flow provided to communicate with the side hole of the tip member. The nozzle according to (11) or (12) above, characterized in that a nozzle is provided.

  As described above, in the present invention, the first nozzle member having the base portion and the convex portion substantially upright on the base portion and having a medium hole inside the convex portion, and the through hole fitted to the convex portion are provided. A nozzle tip member having a second nozzle member, and a groove is provided on the inner peripheral surface of the through hole and / or the outer peripheral surface of the convex portion, and the side hole is configured by fitting the through hole to the convex portion. For this reason, the degree of freedom in forming the side holes is increased, and the nozzle can be adjusted more easily.

It is a schematic sectional drawing of the tip member of the nozzle concerning the Example of this invention. It is a schematic side view of the tip member of the nozzle concerning the Example of this invention. It is a schematic side view which shows separately the 1st and 2nd nozzle member of the front-end | tip member of the nozzle concerning the Example of this invention. It is a schematic top view (partially perspective view) of the tip member of the nozzle concerning another example of the present invention. It is a schematic perspective view of the front-end | tip member of the nozzle concerning another Example of this invention. It is a schematic exploded perspective view of the tip member of the nozzle concerning another example of the present invention. It is a schematic side view which shows the state to apply with the nozzle using the tip member of the nozzle of the Example of this invention. It is a schematic see-through | perspective side view of the nozzle front-end | tip part in the state applied by the nozzle using the front-end | tip member of the nozzle of the Example of this invention. It is a schematic sectional drawing of the front-end | tip member of the nozzle concerning another Example of this invention. It is a general | schematic disassembled perspective view of the front-end | tip member of the nozzle concerning another Example of this invention. It is a general | schematic disassembled perspective view of the front-end | tip member of the nozzle concerning another Example of this invention. It is a schematic perspective view of the front-end | tip member of the nozzle concerning another Example of this invention. It is a general | schematic disassembled perspective view of the front-end | tip member of the nozzle concerning another Example of this invention.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings, components having the same configuration or function and corresponding parts are denoted by the same reference numerals and description thereof is omitted. Moreover, in the following description, the example of the embodiment which concerns on this invention is shown, and it can change suitably based on the technical common sense of those skilled in the art, without exceeding the range of this invention. Therefore, the scope of the present invention is not limited to these specific examples. Further, these drawings are emphasized for explanation and may be different from actual dimensions.

  1 to 3 show a schematic cross-sectional view and a side view of the tip member of the nozzle of the first embodiment. The nozzle tip member 10 is interposed between the first nozzle member 12 disposed on the bottom, the second nozzle member 14 fitted thereon, and the first nozzle member 12 and the second nozzle member 14. And a seal member 16 provided. The first nozzle member includes a plate-like base portion and a convex portion provided substantially upright with respect to the base portion, and the convex portion has a middle hole that is an injection hole in the center thereof. is there. More specifically, the first nozzle member 12 includes a rectangular plate-like base portion 12A that extends horizontally and a columnar (conical frustum-shaped) convex portion 12B that is substantially upright. A central hole 20 that is an injection hole extending in the axial direction is provided at the center of the cylindrical shape of the convex portion 12B, and the intermediate hole 20 is connected (communicated) to a passage 22 provided inside the base portion 12A. A tapered surface 21 is formed on the outer peripheral surface of the convex portion 12 </ b> B and is used for fitting with the second nozzle member 14. In addition, gas passages 39 that are through holes are provided on both sides of the convex portion 12B in the base portion 12A.

  The second nozzle member has a plate-like second nozzle body provided with a through hole that is an opening fitted to the convex portion of the first nozzle member, and one or more grooves are formed on the inner peripheral surface of the through hole. Is provided. More specifically, the second nozzle member 14 is composed of a rectangular plate-like base body having a substantially central through hole 15. The through-hole 15 is provided in the upper opening 15A provided on the upper surface of the second nozzle member 14, the lower opening 15B provided on the lower surface of the second nozzle member 14, the upper opening 15A and the lower opening 15B being larger than the upper opening 15A. It is comprised by the taper surface 30 which connects. As shown in FIG. 3, the tapered surface 30 is provided with at least one groove 32 along the tapered surface 30 and connecting the upper opening 15A and the lower opening 15B. The taper angle of the taper surface 30 is substantially the same as the taper angle of the taper surface 21 of the convex portion 12 </ b> B, and here is 20 to 40 degrees with respect to the axial direction of the inner hole 20.

  In the present embodiment, the case where the groove 32 is along the tapered surface 30, in other words, the case where the upper opening 15 </ b> A side of the groove 32 is inclined toward the center line passing through the center of the through hole 15 is taken as an example. Although described, the present invention is not limited to this. For example, the convex portion 12B has a cylindrical shape and does not have the tapered surface 21, the through hole 15 has the upper opening 15A and the lower opening 15B having the same diameter and does not have the tapered surface 30, and the groove 32 is formed at the center of the through hole 15. You may provide in parallel with the centerline which passes through.

  In FIGS. 2 and 3, the seal member 16 is omitted for simplification, but the first nozzle member 12 and the second nozzle member 14 are fitted without providing such a seal member depending on conditions. May be combined. As shown in FIG. 3, the first nozzle member 12 and the second nozzle member 14 are overlapped with each other by fitting the convex portions 12B and the through holes 15 so that the fixing bolt holes 40 and 42 communicate with each other. These superpositions may be performed by aligning the side surfaces of the base portion 12A of the rectangular plate-shaped first nozzle member 12 and the rectangular plate-shaped substrate of the through hole 15.

  Next, the 2nd nozzle member 14 is lowered | hung and the convex part 15B is fitted to the through-hole 15 (FIG. 2). Thereby, the opening of the groove 32 is blocked by the tapered surface 21, and a side hole 36 is formed by the groove surface of the groove 32 and the tapered surface 21. In this way, the side holes 36 can be formed simply by providing the grooves 32 on the tapered surface 30, so that the side holes 36 can be easily manufactured.

  The nozzle tip member 10 thus combined is supplied with a compressed paint from a paint supply source (not shown) connected to the inner hole 20 and the passage 22, and the paint is supplied from the middle hole opening 20 </ b> A of the inner hole 20. Is injected. On the other hand, the lower opening 15 </ b> B and the gas passage 39 of the second nozzle member 14 are abutted in a state of being sealed by the seal member 16. Then, compressed air is supplied from a compressed air supply device (not shown) through a passage 99 (described later: see FIG. 8) connected to the gas passage 39 so that the compressed air is in the side hole opening 36A of the side hole 36. Is injected from. Since this jet air is jetted along the tapered surfaces 30 and 21, it intersects with the paint jetted from the medium hole opening 20A. The gas supplied through the gas passage 39 is branched into each side hole 36 using the space near the lower opening 15B, that is, the circular recess 38 in the lower surface of the second nozzle member 14 as a header portion.

  In this way, the nozzle tip is a separate part from the nozzle body, and the nozzle tip is divided into a first nozzle member 12 and a second nozzle member 14 on a plane orthogonal to the longitudinal direction of the central flow path, A central hole 20 that is a through hole for the central flow path and a side hole 36 that is a through hole for the gas flow path are provided, but the groove 32 constituting the side hole 36 is connected to the air passage 39. Are fitted together. And the side hole 36 which is a gas flow path is a flow path smaller in diameter than the middle hole 20 which is a central flow path, and is disposed around the central flow path. The gas channel is formed so as to be inclined (or curved) toward the center channel along the tapered surfaces 21 and 30 so that the nozzle of the gas channel is close to the nozzle of the center channel on the tip side of the nozzle. Such 1st nozzle member 12 and 2nd nozzle member 14 may be comprised with resin injection molded parts. Alternatively, the first nozzle member 12 and the second nozzle member 14 may be formed of a cast (for example, lost wax casting) product (made of metal or resin) or a metal powder injection molded product. The seal member 16 is not particularly limited as long as it is a member having a lower hardness (softer) than the constituent members of both nozzle members, and examples thereof include silicon resin. In addition, it goes without saying that any member that can seal liquid or gas, or any member conventionally used as a sealing member or gasket member can be applied.

  Here, the first nozzle member 12 and the second nozzle member 14 described above are each made of a resin injection molded product made by injection molding of resin. The groove 32 constituting the side hole 36 in the nozzle tip member 10 of this embodiment is formed simultaneously with the injection molding. On the other hand, when the nozzle tip member is integrally formed by injection molding as in the prior art, it is necessary to use a cast pin (core pin) or the like in order to form the side hole. Since the thin core pin may be broken, the running cost of the mold and, as a result, the manufacturing cost of the product is increased. Since the nozzle tip member 10 of the present embodiment does not have such a problem, the manufacturing cost of the product can be reduced.

  Moreover, since the groove | channel 32 which comprises the side hole 36 in the nozzle tip member 10 of a present Example is formed simultaneously at the time of injection molding, it is not necessary to carry out perforation formation using a drill after injection molding. Even if the groove 32 is formed later by using a cutting tool without forming the groove 32 at the same time as injection molding, there is almost no possibility that the cutting tool is broken as in the case of drilling. Therefore, it is possible to form the side holes more easily and at a lower cost than in the past.

  Furthermore, the hole diameter of the side hole 36 in the nozzle tip member 10 of this embodiment formed by fitting two resin injection molded products (nozzle members 12 and 14) is the same as that of the side hole in the nozzle tip portion integrally molded to the same size. Compared to the hole diameter, it can be made smaller (for example, a diameter of 0.4 mm). As a result, the flow rate of the compressed gas is further increased, and the liquid is ejected at a high pressure. This has the effect of improving the impact force on the object to be sprayed, and is particularly effective for uses such as cleaning. Moreover, the injection region is widened by high-pressure injection.

  4 to 6 show a tip member of a nozzle according to another embodiment of the present invention in a top view, a perspective view, and an exploded perspective view. Since the structure is basically the same as that shown in FIGS. 1 to 3, overlapping descriptions are omitted, and common reference numerals are used for common or corresponding members. In the same manner as described above, the nozzle tip member 10 includes a first nozzle member 12 disposed at the bottom, a second nozzle member 14 fitted thereon, and the first nozzle member 12 and the second nozzle member 14. And a seal member 16 provided therebetween. Similarly, the side holes 36 are also formed. The injection holes of the side holes 36 are inclined toward the circumferential direction of a concentric circle with the center hole 20 as the center, and six are provided at equal intervals. The inclination angle at this time is 5 to 20 degrees. Since the side holes 36 are inclined as described above, the jetted compressed air advances in the paint jetting direction while drawing a spiral. That is, the side hole 36 which is a gas flow path is a flow path having a smaller diameter than the central hole 20 which is a central flow path, and the side hole opening 36A is disposed so as to surround the middle hole opening 20A. The side hole 36 is formed so as to be inclined (or curved) so as to be close to the middle hole opening 20 </ b> A that is the injection port of the middle hole 20 on the nozzle tip side. For this reason, an injection liquid can be injected in the shape of a tornado, the injection area | region becomes still wider, and the further improvement of the injection capability is aimed at by this.

  FIGS. 7 and 8 are a schematic side view showing a state in which application is performed by a nozzle using the nozzle tip member 10 as described above, and a side view in which a part thereof is seen through. The nozzle tip member 10 is fixed with a bolt or the like to a nozzle body 91 connected to a supply member for supplying liquid and gas (not shown), and the nozzle tip member 10 is fixed to the nozzle body 91 with a bolt 96 via a washer 94. . A passage 22 (see FIG. 1) of the nozzle tip member 10 is connected to a passage (first fluid passage) 98 in the nozzle main body 91, and a liquid supply device (not shown) is connected to the passage 98, and paint Etc. are supplied. Further, a gas passage 39 (see FIG. 1) of the nozzle tip member 10 is connected to a passage (second fluid passage) 99 in the nozzle body 91, and a gas supply device (not shown) is connected to the passage 99. Gas is supplied. In this way, the liquid and the gas are ejected from the respective openings (the middle hole opening 20A and the side hole opening 36A), and the coating liquid 103 is sprayed on the surface of the spray target 101. Since the nozzle tip member 10 is detachably fastened to the nozzle body 91 with bolts, cleaning and replacement are facilitated even when liquid is clogged in the inner hole 20.

  9 and 10 are a schematic sectional view and a schematic exploded perspective view of a tip member of a nozzle according to still another embodiment. Since the structure is basically the same as that of FIG. 4 to FIG. 6, overlapping descriptions are omitted, and common reference numerals are used for common or corresponding members. As shown in FIG. 10, the side holes 36 are inclined in the circumferential direction, but in FIG. 9, only the side holes 36 are drawn in a cross section along the inclination for the sake of simplification. It will have the same cross section as not). In the same manner as described above, the nozzle tip member 200 includes the first nozzle member 12 disposed on the bottom, the second nozzle member 14 fitted thereon, and the first nozzle member 12 and the second nozzle member 14. And a seal member 16 provided therebetween. Here, the second nozzle member 14 includes an upper first slice body 142 and a lower second slice body 144. The groove that becomes the side hole 36 includes a first groove 132 that is slightly narrower placed on the first slice body 142 and a second groove 133 that is placed on the second slice body 144 and has a normal width. That is, the side holes 36 are holes having different thicknesses on the upper side and the lower side. Usually, it is difficult to provide such a hole with a drill, but if such an assembly is used, a side hole 36 having a diameter easily changed can be provided. In this way, the second nozzle member 14 has a plurality of slice division structures, and each slice body is positioned and overlapped in order so that each through hole is continuous and the side hole 36 that is a gas flow path is formed. Thus, various side holes 36 can be formed. Although the first nozzle member 12 is provided integrally instead of a plurality of slice division structures, the liquid has a higher viscosity than gas and may be fixed. Is more preferable.

  FIG. 11 is a schematic exploded perspective view showing a tip member of a nozzle according to still another embodiment. Since the structure is basically the same as that of FIG. 9 and FIG. 10, overlapping descriptions are omitted, and common reference numerals are used for common or corresponding members. In the same manner as described above, the nozzle tip member 210 includes the first nozzle member 12 disposed on the bottom, the second nozzle member 14 fitted thereon, and the first nozzle member 12 and the second nozzle member 14. And a seal member 16 provided therebetween. Here, the first nozzle member 12 includes a rectangular plate-like base portion 12A that extends horizontally and a columnar convex portion 112B that is substantially upright. A center hole 20 that is an injection hole extending in the axial direction is provided at the center of the cylindrical shape of the convex portion 112B, and is connected to a passage 22 that is slightly thicker than the center hole 20 (see FIG. 9). In the middle of the convex portion 112 </ b> B, a cylindrical side surface 121 serving as a straight body is formed and used for fitting with the second nozzle member 14. Gas passages 39 are provided on both sides of the convex portion 112B.

  The second nozzle member 14 includes an upper first slice body 142 and a second slice body 144. The 1st slice body 142 and the 2nd slice body 144 are comprised from the rectangular-plate-shaped base | substrate provided with the substantially central through-holes 115A and 115B, respectively. The through holes 115A and 115B have openings of the same size on the upper surface and the lower surface. Accordingly, the grooves 132 and 133 (see FIG. 10) are inclined in the circumferential direction of the cylinder, but extend along the column side surface 121. Accordingly, the injection gas is not injected toward the center, but is injected in a spiral pattern.

  FIG. 12 is a perspective view showing a tip member of a nozzle according to another embodiment of the present invention. Since the structure is basically the same as that shown in FIG. 5, overlapping description is omitted, and common reference numerals are used for common or corresponding members. In the same manner as described above, the nozzle tip member 10 includes a first nozzle member 12 disposed at the bottom, a second nozzle member 14 fitted thereon, and the first nozzle member 12 and the second nozzle member 14. And a seal member 16 provided therebetween. Similarly, the side holes 36 are also formed. The injection holes of the side holes 36 are inclined toward the circumferential direction of a concentric circle with the center hole 20 as the center, and six are provided at equal intervals. The inclination angle at this time is 5 to 20 degrees. These side holes 36 are formed in the groove 33 formed on the tapered surface 21 on the outer peripheral surface of the convex portion 12B (see FIG. 1) and the tapered surface 30 which is the inner peripheral surface of the through hole 15 (see FIG. 3). It is formed by the groove 32. That is, the side hole 36 may be formed by the groove 33 on the outer peripheral surface of the convex portion 12B and the inner peripheral surface of the through hole 15, and may include the opening 36B. Alternatively, the side hole 36 may be formed by the groove 32 on the outer peripheral surface of the convex portion 12B and the inner peripheral surface of the through hole 15, and may include an opening 36A. Alternatively, the side hole 36 may be formed by the groove 33 on the outer peripheral surface of the convex portion 12B and the groove 32 on the inner peripheral surface of the through hole 15, and may include an opening 36C. As described above, by appropriately changing the members forming the grooves, the variety of side holes 36 and the respective openings 36A, 36B, and 36C can be made relatively easily.

  FIG. 13: shows the front-end | tip member of the nozzle concerning another Example in a schematic exploded perspective view. Since the structure is basically the same as that of FIG. 11, repeated description is omitted, and common reference numerals are used for common or corresponding members. In the same manner as described above, the nozzle tip member 210 includes the first nozzle member 12 disposed on the bottom, the second nozzle member 14 fitted thereon, and the first nozzle member 12 and the second nozzle member 14. And a seal member 16 provided therebetween. Here, the first nozzle member 12 includes a rectangular plate-like base portion 12A that extends horizontally and a columnar convex portion 112B that is substantially upright. A center hole 20 that is an injection hole extending in the axial direction is provided at the center of the cylindrical shape of the convex portion 112B, and is connected to a passage 22 that is slightly thicker than the center hole 20 (see FIG. 9). In the middle of the convex portion 112B, a cylindrical side surface 121 serving as a straight body is formed, and a groove 134 is formed on the side peripheral surface thereof. The grooves 134 are formed so as to correspond to the grooves 132 and 133 formed on the inner peripheral surfaces of the through holes of the first slice body 142 and the second slice body 144. 132, 133, 134 coincide to form a side hole 36 (see FIG. 12 and the like).

  As described above, in the tip member of the nozzle of the present invention, the groove 32 is formed on at least one of the outer peripheral surface of the convex portions 12B and 112B of the first nozzle member 12 and the inner peripheral surface of the through hole 15 of the second nozzle member 14. By providing the projections 12B and 112B of the first nozzle member 12 and the through holes 15 of the second nozzle member 14, the region surrounded by the groove surface of the groove and the plane covering the groove is fluid (gas). ) Side holes for injection (gas flow path). For this reason, even if it is the shape of the hole (gas flow path) of the nozzle tip where accuracy is required, it is possible to form the hole at the nozzle tip precisely, accurately and inexpensively. Therefore, a significant reduction in the manufacturing cost of the nozzle tip member can be realized.

10, 200, 210 Nozzle tip member 12 First nozzle member
12A Base 12B, 112B Convex
14 Second nozzle member 15 Through hole 15A Upper opening
15B Lower opening 16 Seal member 20 Middle hole
20A Middle hole opening 21 Tapered surface 22 Passage
30 Tapered surface 32 Groove 36, 139 Side hole
38 Recess 39 Gas passage 40, 42 Bolt hole
90 nozzle 91 nozzle body 94 washer
96 bolt 98 passage 101 object to be sprayed
103 Coating liquid 121 Cylindrical side surface 132 First groove
133 2nd groove 142 1st slice body
144 Second slice body

Claims (13)

A nozzle tip member for ejecting a first fluid from an ejection hole and ejecting a second fluid from one or more side holes provided around the ejection hole;
A first nozzle member having a plate-like base portion and a convex portion substantially upright with respect to the base portion, and having an inner hole as the injection hole inside the convex portion;
A plate-like second nozzle main body portion, and a second nozzle member provided with a through-hole that is an opening fitted to the convex portion,
The inner peripheral surface of the through hole has one or more grooves,
The second nozzle member is seated on the first nozzle member while fitting the through hole to the convex portion,
A nozzle tip member, wherein the side hole is constituted by a groove on an inner peripheral surface of the through hole and an outer peripheral surface of the convex portion. The outer peripheral surface of the convex portion has one or more grooves in a portion facing the groove on the inner peripheral surface of the through hole,
2. The nozzle tip member according to claim 1, wherein the groove on the inner peripheral surface of the through hole and the groove on the outer peripheral surface of the convex portion are opposed to each other to form the side hole. A nozzle tip member for ejecting a first fluid from an ejection hole and ejecting a second fluid from one or more side holes provided around the ejection hole;
A first nozzle member having a plate-like base portion and a convex portion substantially upright with respect to the base portion, and having an inner hole as the injection hole inside the convex portion;
A plate-like second nozzle main body portion, and a second nozzle member provided with a through-hole that is an opening fitted to the convex portion,
The outer peripheral surface of the convex portion has one or more grooves,
The second nozzle member is seated on the first nozzle member while fitting the through hole to the convex portion,
A nozzle tip member, wherein the side hole is constituted by a groove on an outer peripheral surface of the convex portion and an inner peripheral surface of the through hole. The inner peripheral surface of the through hole has one or more grooves in a portion facing the groove on the outer peripheral surface of the convex portion,
4. The nozzle tip member according to claim 3, wherein a groove on an outer peripheral surface of the convex portion and a groove on an inner peripheral surface of the through hole are opposed to each other to form the side hole. The convex portion is provided in a tapered shape whose diameter continuously decreases from the base side toward the tip side,
4. The nozzle tip member according to claim 1, wherein the side hole is provided to be inclined toward a central axis of the middle hole along a tapered surface of the convex portion. 5.   6. The nozzle tip member according to claim 5, wherein the side hole is provided so as to be inclined in a circumferential direction of a concentric circle centering on an axis of the middle hole.   4. The nozzle tip member according to claim 1, wherein the base includes a base through hole that is a channel opening communicating with the side hole. 5.   A seal member provided between the convex side surface of the base portion and the first nozzle facing surface of the second nozzle member is further provided to seal the fluid flowing through the side hole. Item 4. A nozzle tip member according to Item 1 or 3.   4. The nozzle tip member according to claim 1, wherein the second nozzle member is formed of a slice body divided into a plurality of planes orthogonal to the longitudinal direction of the medium hole. 5.   The plurality of slice bodies are provided with the grooves on the inner peripheral surface of each of the through holes, and the grooves of each of the slice bodies are formed so that the groove size and / or the groove shape changes continuously. The tip member of the nozzle according to claim 9. A nozzle tip member for ejecting a first fluid from an ejection hole and ejecting a second fluid from one or more side holes provided around the ejection hole;
A first nozzle member having a plate-like base portion and a convex portion substantially upright with respect to the base portion, and having an inner hole as the injection hole inside the convex portion;
A plate-like second nozzle main body portion, and a second nozzle member provided with a through-hole that is an opening fitted to the convex portion,
The inner peripheral surface of the through hole and / or the outer peripheral surface of the convex portion has one or more grooves,
The second nozzle member is seated on the first nozzle member while fitting the through hole into the convex portion, and the groove is formed on the inner peripheral surface of the through hole and the outer peripheral surface of the convex portion. A tip member comprising a hole;
A nozzle body to which the tip member is attached;
The tip member includes fixing means for fixing to the nozzle body,
The nozzle characterized in that the tip member is detachably attached to the nozzle body by the fixing means. A nozzle tip member for ejecting a first fluid from an ejection hole and ejecting a second fluid from one or more side holes provided around the ejection hole;
A plate-like base and a convex part substantially upright with respect to the base,
A first nozzle member having an inner hole as the injection hole inside the convex portion, and a plate-like second nozzle main body portion provided with a through hole which is an opening fitted into the convex portion. 2 nozzle members,
The inner peripheral surface of the through hole and / or the outer peripheral surface of the convex portion has one or more grooves,
The second nozzle member is seated on the first nozzle member while fitting the through hole into the convex portion, and the groove is formed on the outer peripheral surface of the convex portion and the inner peripheral surface of the through hole. A tip member comprising a hole;
A nozzle body to which the tip member is attached;
The tip member includes fixing means for fixing to the nozzle body,
The nozzle characterized in that the tip member is detachably attached to the nozzle body by the fixing means. The nozzle body is
A first fluid channel provided to communicate with the inner hole of the tip member;
The nozzle according to claim 11, further comprising: a second fluid channel provided so as to communicate with the side hole of the tip member.

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