JP2017113733A - Nozzle head mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle head mechanism which reduces a dispersion of pressure in each passage to make the jamming of a nozzle tip or a spin part hard to generate by providing a plurality of branch passages to a spinning passage inside the nozzle tip.SOLUTION: A nozzle head mechanism comprises a head body 12 keeping a liquid introduction pipe 22 suspended from the lower surface side and having an annular groove 24 on one side of the outer peripheral surface 18 to include a communication passage C leading from the liquid introduction pipe 22 to a cut 22 on the upstream side end part 24a side of the annular groove 24, and a nozzle tip 30 keeping the peripheral end part of a partition wall part 32 with a nozzle hole 34 coupled with a fitting tubular part 36 inserted into the annular groove 24. A plurality of spinning passages S are formed between a rod-like projection part 26 formed at the head body part in the annular groove 24 and the partition wall part 32. A plurality of branch passages D are formed which pass from the cut 22 through a gap part A between the rod-like projection part 26 and the fitting tubular part 36 and lead to the inflow port e of each spinning passage S.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a nozzle head mechanism, and more particularly to a nozzle head mechanism applied to a spray device for liquids and foams.

  Conventionally, as this type of nozzle head, an annular groove is formed on one side of the outer peripheral surface of a head body having a liquid introduction tube, and a fitting cylinder portion of a nozzle chip is inserted into the annular groove, A nozzle hole is formed in the central part of the continuous partition wall part, and a plurality of spin passages are formed on the back side of the partition wall part, and a single liquid passage for connecting the spin passage and the liquid introduction pipe is fitted into the fitting cylinder part. What was formed inside is known (patent document 1).

JP2012-152726

In Patent Document 1, since the plurality of spin passages described above are arranged at equal intervals throughout the inside of the partition wall of the nozzle chip, the spin passages and the liquid introduction tube are connected by a single liquid passage. When communicating, a difference in hydraulic pressure is generated between the inside of the spin passage close to the liquid passage and the inside of the spin passage far from the liquid passage.
For this reason, for example, when the viscosity of the content containing the paste component / powder component is high, the stagnation or stagnation of the flow of the content occurs at a low pressure location, and the conditions such as drying are added to the nozzle. There was a risk of clogging at the tip and spin section.

  The object of the present invention is to reduce the pressure variation in each passage by providing a plurality of branch passages inside the nozzle tip up to the spin passage, thereby reducing the stagnation and stagnation of the contents. The object is to provide a nozzle head mechanism that eliminates clogging of the nozzle tip and spin section.

The first means is
A head body 12 in which a liquid introduction pipe P is suspended from the lower surface side;
A nozzle tip 30 attached to one side of the head body 12 and having a nozzle hole 34;
Comprising
A plurality of branch passages D extending in the lateral direction are formed between the communication passage C extending in the substantially vertical direction from the liquid introduction pipe P and the spin passage S formed around the nozzle hole 34,
Each branch passage D includes a notch 22 that passes through a wall portion that surrounds the communication passage C.

  In this means, as shown in FIG. 2, a plurality of laterally extending passages are formed between the communication passage C extending from the liquid introduction pipe P in the substantially vertical direction and the spin passage S formed around the nozzle hole 34. It is proposed to form the branch passage D. Each branch passage includes a notch that is a through-hole to the communication passage. As a result, the degree of freedom of the path from the liquid introduction tube P to each spin passage S is increased, so that the variation in pressure loss between the liquid introduction tube P and each spin passage is reduced. Accordingly, the difference in the internal pressure of each spin passage S is reduced, so that the stagnation and stagnation of the flow of contents are eliminated, and clogging of the nozzle tip and the spin part is difficult to occur. Furthermore, since the difference in the internal pressure of each spin passage S is reduced, the mist of the contents can be discharged in a more stable state.

In the present specification, the “nozzle head mechanism” is not limited to the nozzle head itself, and does not exclude a part including a part of the structure of the spray device (the upper end portion of the stem in the illustrated example).
The “branch path” is sufficient if it is branched into a plurality from the communication path C, and may be partially communicated with each other on the downstream side of the branch point.

The second means includes the first means, and an annular groove 24 is formed at the nozzle tip attachment location of the head body 12.
The nozzle chip 30 includes a fitting cylinder part 36 fitted in the annular groove 24 and a partition part 32 having a peripheral end connected to the fitting cylinder part 36 and a nozzle hole 34 opened in the center. And
A plurality of contact ribs 28 that protrude from one of the inner peripheral surface of the fitting tube portion 36 and the small-diameter peripheral surface 26b of the annular groove 24 facing the inner peripheral surface and contact the other are formed.
The branch passage D is an upstream passage portion DU formed by the notch 22 and a downstream passage portion that is located on the outer side in the lateral direction with respect to the notch 22 and is formed between adjacent contact ribs 28. Including DL.

  In this means, as shown in FIG. 3, the branch passage D is positioned laterally outward with respect to the upstream passage portion DU formed by the notch 22 and the notch 22, and the inner periphery of the fitting cylinder portion 36 It is proposed to include a downstream passage portion DL formed between the surface and the small-diameter peripheral surface of the annular groove 24. As a result, the pressure loss variation is reduced not only in the notch 22 but also in the annular groove 24 on the downstream side thereof, so that the pressure in each spin passage S can be made more uniform.

The third means includes the first means or the second means, and each of the contact ribs 28 is located between the adjacent notches 22 when viewed from the lateral direction.

  In this means, as shown in FIG. 3, it is proposed that the contact rib 28 is positioned between the adjacent notches 22 when viewed from the lateral direction. Thereby, a flow becomes smoother from the upstream passage part DU of the branch passage D to the downstream passage part DL.

According to the first aspect of the invention, a plurality of laterally extending portions are provided between the communication passage C extending in the substantially vertical direction from the liquid introduction pipe P and the spin passage S formed around the nozzle hole 34. Since the branch passages D are formed, the pressure variation in each spin passage S can be reduced as compared with the case where the spin passages S communicate with each other through a single passage.
According to the second aspect of the invention, the branch passage D is located on the outer side in the lateral direction with respect to the upstream passage portion DU formed by the notch 22 and the notch 22, Since the downstream passage portion DL formed between the circumferential surface and the small-diameter circumferential surface of the annular groove 24 is included, the pressure in each spin passage S can be made more uniform.
According to the third aspect of the invention, since the abutment rib 28 is proposed to be positioned between the adjacent notches 22 when viewed from the lateral direction, the upstream passage portion of the branch passage D is proposed. The flow becomes smoother from the DU to the downstream passage portion DL.

It is a general view which shows the nozzle head mechanism which concerns on 1st Embodiment of this invention in the state integrated in the spray apparatus. FIG. 2 is a half sectional view of the nozzle head mechanism of FIG. 1. It is sectional drawing seen from the III-III direction of the nozzle head mechanism of FIG. FIG. 3 is an operation explanatory diagram of the nozzle head mechanism of FIG. 2. It is a fragmentary longitudinal cross-sectional view of the nozzle head mechanism which concerns on 2nd Embodiment of this invention. It is sectional drawing seen from the VI-VI direction of the nozzle head mechanism of FIG. It is a longitudinal cross-sectional view of the modification of the nozzle head mechanism of FIG. It is sectional drawing seen from the VIII-VIII direction of the nozzle head mechanism of FIG.

1 to 4 show a nozzle head mechanism according to a first embodiment of the present invention together with a spray device.
In FIG. 1, reference numeral 2 denotes a spray device, which has an operating member 5 that hangs a cylinder 4 from a cap 3 attached to a container body neck and neck portion and inserts a lower half portion into the cylinder. The actuating member stands up the stem 6 from a piston (not shown), and the nozzle head 10 of the present invention is attached to the upper end of the stem. At the same time, it is configured to eject from the nozzle head 10.

  The nozzle head 10 includes a head body 12 and a nozzle chip 30. Each of these members can be formed of, for example, a synthetic resin.

In the head main body 12, a head peripheral wall 16 is suspended from the outer peripheral portion of the head top wall 14, and a liquid introduction pipe P is suspended from the lower surface side of the main body. In the present embodiment, the seal tube portion 20 protruding downward from the bottom wall portion of the head body 12 is fluid-tightly fitted to the outer surface of the upper end portion of the stem 6, and the seal tube portion 20 and the upper end portion of the stem are Thus, the liquid introduction pipe P is formed.
A communication path C extends from the inside of the liquid introduction pipe P upward (substantially in the vertical direction). An annular groove 24 is formed in a part of the outer peripheral surface 18 of the head peripheral wall 16. In the illustrated example, notches 22 are formed at several locations on the upstream end 24 a of the annular groove to serve as communication ports with the communication path C. In FIG. 3, the position of the notch 22 that does not originally appear in FIG. In a preferred illustrated example, when the same number of notches 22 as the downstream passage portion DL of the branch passage D described later are viewed from the direction of FIG. 3 (the protruding direction of a rod-shaped protrusion 26 described later), the notch 22 is the downstream passage portion. It is arranged at a position overlapping with DL. In the illustrated example, four notches 22 are formed on the top, bottom, left, and right shown in FIG. The insertion depth of the stem 6 into the head main body 12 is set so that each notch 22 is not blocked at the top of the stem 6.

  The head main body portion surrounded by the annular groove 24 is preferably formed in a rod-like protrusion 26 having a round bar or cylindrical shape. Here, the term “projection” means that the projection protrudes outward in the horizontal direction with respect to the upstream end 24 a of the annular groove 24. The protruding length is shorter than the depth of the annular groove 24. As shown in FIG. 2, the tip end surface 26 a of the rod-shaped protrusion 26 is inward of the outer peripheral surface 18 of the head peripheral wall 16. Note that the tip end surface 26a of the rod-shaped protrusion is formed in a vertical flat surface.

  A plurality of contact ribs 28 extending in the protruding direction are formed on the small-diameter peripheral surface of the annular groove 24 (in other words, the side peripheral surface 26b of the rod-shaped protrusion 26). In the illustrated example, these contact ribs 28 are formed on the side peripheral surface portion excluding the tip end side of the rod-like protrusion 26.

  The nozzle chip 30 preferably includes a disk-shaped partition wall portion 32 and a fitting cylinder portion 36 having a front end portion connected to a peripheral edge portion of the partition wall portion 32.

  The partition wall 32 has a nozzle hole 34 in the center. A plurality of spin passages S are formed between the partition wall 32 and the tip end surface 26 a of the rod-shaped protrusion 26 from the peripheral edge side toward the nozzle hole 34. In this embodiment, a spin groove is provided on the back surface of the partition wall, and a spin passage S is formed by the spin groove and the tip surface 26 a of the rod-shaped protrusion 26. However, a spin groove may be formed on the tip surface 26 a of the rod-shaped protrusion 26, and a spin passage may be formed by the spin groove and the rear surface of the partition wall 32.

The fitting cylinder portion 36 is fitted into the annular groove 24. The inner diameter of the fitting cylinder portion 36 is larger than the outer diameter of the rod-like protrusion 26, and the contact rib 28 protruding outward from the side peripheral surface 26 b of the rod-like protrusion 26 is formed on the inner surface of the fitting cylinder portion 36. The gap portion A for abutment and passage formation is secured, and the fitting cylinder portion 36 is held between the annular groove 24 and the large-diameter peripheral surface. However, this configuration can be changed as appropriate. For example, the abutment rib 28 may protrude inward from the inner surface of the fitting tube portion 36 and abut against the side peripheral surface 26 b of the rod-like protrusion 26.
In the present embodiment, the fitting cylinder portion 36 does not reach the upstream end 24a of the annular groove 24, and a gap is formed between the fitting cylindrical portion 36 and the upstream end 24a. This gap is formed as a midstream passage portion DM which will be described later.

The nozzle head 10 of the present invention has a plurality of branch passages D from the notches 22 opened in the upstream end 24a of the annular groove 24 to the inlet e of the spin passage S through the gap A. Yes. The branch passage D of the present embodiment is formed by an upstream passage portion DU, a midstream passage portion DM, and a downstream passage portion DL.
The upstream passage portion DU is formed as a notch 22 formed in the upstream end 24 a of the annular groove 24. As shown in FIG. 2, each notch 22 is arranged at a position facing the downstream passage portion DL with the middle flow passage portion DM interposed therebetween.
As described above, the downstream passage portion DL is formed between the adjacent contact ribs 28 by disposing the contact ribs 28 between the adjacent branch passages D. In other words, the abutment rib 28 serves as a partition means.
The middle flow passage portion DM is a portion of the annular groove 24 that is inward from the fitting cylinder portion 36 and is located between the upstream passage portion DU and the downstream passage portion DL. Adjacent branch passages D communicate with each other through a midstream passage portion DM. This contributes to further averaging the internal pressure of each branch passage D.
However, these structures can be changed as appropriate. For example, by setting the length of the fitting cylinder portion 36 to reach the upstream end 24a of the annular groove 24, the midstream passage portion DM can be omitted.

As shown in FIG. 3, each downstream passage portion DL is a wide passage having a passage width w1 in the circumferential direction larger than at least the gap length g between the inner surface of the fitting tube portion 36 and the outer surface of the rod-like protrusion 26. ing. If the shape is wide, variations in pressure loss in each branch passage are reduced, and a sufficient flow of each spin channel on the downstream side can be secured, so that nozzle clogging is less likely to occur.
Further, in a preferred illustrated example, the passage width w1 of the branch passage D is made larger than the width w2 of the contact rib 28. In this way, the passage area as a whole is increased, so that even when the content is highly viscous, a required amount of the content can be smoothly discharged. However, these configurations can be changed as appropriate.

In the present embodiment, four branch passages D are provided that are positioned on the top, bottom, left, and right in FIG. However, the number of branch passages D can be changed as appropriate, and the number may not be the same as the number of spin passages S.
Each branch passage D is desirably designed so that the pressure loss when the fluid passes through the passage is the same. In the illustrated example, the cross-sectional shape of the upstream passage portion (notch 22) of each branch passage D and the cross-sectional shape of the downstream passage portion are substantially the same.

According to the above configuration, when the spray device 2 is attached to the mouth and neck of the container body and the nozzle head 10 is pushed down, the liquid pushed out from the cylinder 4 of the spray device 2 is, for example, denoted by F1 in FIG. Along the flow lines indicated by F2 and F3, the air enters the inlet e of the spin passage S from the communication passage C through the branch passages D.
Assuming that there is only one passage in the annular groove 24, in order for the fluid to enter the spin passage S far from the single passage, a route as depicted by an imaginary line F0 in FIG. Must be traced.
Compared to this, in the configuration of the present invention, since there is no significant difference in the way to enter any one of the spin passages through each branch passage D, the variation in pressure loss is reduced. As a result, the pressure in each spin passage S is also averaged, and nozzle clogging due to local stagnation and stagnation can be avoided. Therefore, it is effective to use the nozzle head mechanism particularly in a spray device suitable for discharging contents containing a paste component or a powder component.

  Hereinafter, other embodiments of the present invention will be described. In these descriptions, the description of the same structure as that of the first embodiment is omitted.

5 and 6 show an example of a nozzle head according to the second embodiment of the present invention. In the present embodiment, the number and shape of the branch passages D are changed.
That is, as shown in FIG. 6, three branch passages D are provided, and the notch 22 of each branch passage D is on the upper side and both left and right sides of the upstream end 24 a of the annular groove 24. The downstream passage portion DL of the branch passage D has a larger width in the lower right downstream passage portion DL and the lower left downstream passage portion DL than in the upper downstream passage portion DL. Also, the size of the notch 22 is larger on the left and right than on the upper side.
In the present embodiment, the stem 6 is inserted further into the head body 12 than in the configuration shown in FIG. As a result, the position of the outlet of the communication path C (the portion above the stem in the illustrated example) is biased upward from the center of the annular groove 24, so that the branch path D is closer to the outlet of the communication path C. Also, the flow path area of the branch passage D located far from the outlet is set large. Thereby, the dispersion | variation in the pressure loss in each branch passage D is reduced.

  7 and 8 are modifications of the present embodiment. 5 and 6, the right and left cutouts 22 are rectangular, but in the present modification, the right and left cutouts 22 are bent along the upstream end 24 a of the annular groove 24. The shape is long in the circumferential direction. Thereby, the size of the notch 22 can be further increased.

DESCRIPTION OF SYMBOLS 2 ... Spray apparatus 3 ... Mounting cap 4 ... Cylinder 5 ... Actuating member 6 ... Stem 10 ... Nozzle head 12 ... Head main body 14 ... Head top wall 16 ... Head peripheral wall 18 ... Outer peripheral surface 20 ... Seal cylinder part 22 ... Notch 24 ... Annular groove 24a ... upstream end 26 ... rod-like protrusion 26a ... tip end face 26b ... side peripheral surface 28 ... contact rib 30 ... nozzle tip 32 ... partition wall 34 ... nozzle hole 36 ... fitting cylinder part A ... gap part C ... Communication passage D ... Branch passage DU ... Upstream passage portion DM ... Middle flow passage portion DL ... Downstream passage portion e ... Inlet F0, F1, F2, F3 ... Stream line g ... Gap length P ... Liquid introduction pipe S ... Spin passage w1 ... passage width of downstream passage portion w2 ... width of abutment rib

Claims (3)

A head body (12) in which a liquid introduction pipe (P) is suspended from the lower surface side;
A nozzle tip (30) attached to one side of the head body (12) and having a nozzle hole (34);
Comprising
A plurality of branch passages extending in the lateral direction between the communication passage (C) extending substantially vertically from the liquid introduction pipe (P) and the spin passage (S) formed around the nozzle hole (34) (D) is formed,
Each branch passage (D) includes a notch (22) penetrating a wall portion surrounding the communication passage (C). An annular groove (24) is formed at the nozzle tip mounting location of the head body (12),
The nozzle tip (30) includes a fitting cylinder portion (36) fitted in the annular groove (24), a peripheral end portion connected to the fitting cylinder portion (36), and a nozzle hole in the center portion. (34) has an open partition (32),
A plurality of abutting ribs (28) projecting from one of the inner peripheral surface of the fitting tube portion (36) and the small-diameter peripheral surface of the annular groove (24) facing the inner peripheral surface are formed,
The branch passage (D) has an upstream passage portion (DU) formed by the notch (22) and an abutment rib (28) located on the outer side in the lateral direction with respect to the notch (22) and adjacent thereto. The nozzle head mechanism according to claim 1, further comprising a downstream passage portion (DL) formed therebetween.   3. The nozzle head according to claim 1, wherein each of the contact ribs (28) is located between adjacent notches (22) when viewed from the lateral direction. mechanism.