JP5901914B2

JP5901914B2 - Liquid filling nozzle

Info

Publication number: JP5901914B2
Application number: JP2011196448A
Authority: JP
Inventors: 田中　康裕; 康裕田中; 秦野　耕一; 耕一秦野
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2011-09-08
Filing date: 2011-09-08
Publication date: 2016-04-13
Anticipated expiration: 2031-09-08
Also published as: JP2013056696A

Description

本発明は液体を容器等に充填するための液体充填用ノズルに関する。 The present invention relates to a liquid filling nozzle for filling a container or the like with a liquid .

従来、液体を容器に充填するときに、容器内における液体の泡立ちを抑制することが求められている。そのためには、ノズルから吐出される液体の流れ（液柱）が乱れのない層流であることが望ましい。液柱の速度分布が液柱断面の中央部でも液柱の表面でも同一になる層流状態とすることで、液柱の表面付近における流れの乱れを抑制する。これによって、容器内の底部に衝突した液柱が容器内の側壁に向けて流れの向きを変える際の流れがスムーズになり、泡の発生を抑制することができる。 Conventionally, when filling a container with a liquid, it is required to suppress foaming of the liquid in the container. For that purpose, it is desirable that the flow (liquid column) of the liquid discharged from the nozzle is a laminar flow without any disturbance. The turbulence of the flow in the vicinity of the surface of the liquid column is suppressed by providing a laminar flow state in which the velocity distribution of the liquid column is the same at the center of the liquid column cross section and the surface of the liquid column. Thereby, the flow when the liquid column colliding with the bottom in the container changes the flow direction toward the side wall in the container becomes smooth, and the generation of bubbles can be suppressed.

一方、泡立ちを抑制する方法として、充填時に容器内に挿入されたノズルの先端と液面の間の距離を最小にするようにノズルの先端レベルを液面のレベル変化に追従して上昇させる、ノズルの液面追従充填操作も行なわれている。この場合、ノズル外径を容器の液充填口内径よりも小さくする必要がある。 On the other hand, as a method for suppressing foaming, the tip level of the nozzle is raised following the change in the level of the liquid so as to minimize the distance between the tip of the nozzle inserted into the container at the time of filling and the liquid level, The liquid level following filling operation of the nozzle is also performed. In this case, it is necessary to make the outer diameter of the nozzle smaller than the inner diameter of the liquid filling port of the container.

また、ノズル内径を可能な限り大きくすることにより、ノズル内の液流通部の流路面積を大きくして、流量を低下させることなく液流速の低減を図り、液柱が容器内の底部に衝突する際の打撃力低減によって泡立ちを抑制することも有効である。 Also, by increasing the inner diameter of the nozzle as much as possible, the flow area of the liquid circulation part in the nozzle is increased to reduce the liquid flow rate without reducing the flow rate, and the liquid column collides with the bottom of the container. It is also effective to suppress foaming by reducing the striking force when doing so.

しかるに、泡立ちを抑制するために液柱を乱れのない層流にする従来例として、特許文献１〜４に記載される如く、ノズル内の出口付近にメッシュを設け、液柱におけるノズル中心部の流速とノズル内壁面付近の流速とを同等化することが試みられている。 However, as a conventional example in which the liquid column is made into a laminar flow without disturbance in order to suppress foaming, as described in Patent Documents 1 to 4, a mesh is provided in the vicinity of the outlet in the nozzle, and the center of the nozzle in the liquid column is provided. Attempts have been made to equalize the flow velocity and the flow velocity in the vicinity of the inner wall surface of the nozzle.

特許文献１に記載のノズルは、ノズルの筒部の先端内縁部を内方へ直角に折り返した取付部とし、筒部内に挿入したメッシュの外縁部を取付部の上に保持するものである。 The nozzle described in Patent Document 1 is a mounting portion in which a tip inner edge portion of a cylindrical portion of the nozzle is folded inwardly at a right angle, and an outer edge portion of a mesh inserted into the cylindrical portion is held on the mounting portion.

特許文献２に記載のノズルは、ノズルの本体筒部と先端筒部とをそれらの外周フランジ部により接続し、メッシュを収めた環状ケースの外周部を先端筒部内に保持するものである。 The nozzle described in Patent Document 2 connects a main body cylinder portion and a tip cylinder portion of the nozzle by their outer peripheral flange portions, and holds an outer peripheral portion of an annular case containing a mesh in the tip cylinder portion.

特許文献３に記載のノズルは、複数のメッシュの中央に設けたピン貫通孔に通したピンとシールリングでメッシュユニットを形成し、このメッシュユニットをノズルの筒部の先端に形成した段部に収容し、メッシュユニットを形成しているピンをノズルの筒部中心部に設けてある雌ねじ部に螺合させることにより、メッシュユニットを保持するものである。 In the nozzle described in Patent Document 3, a mesh unit is formed by a pin and a seal ring that are passed through a pin through-hole provided in the center of a plurality of meshes, and this mesh unit is accommodated in a step formed at the tip of a nozzle cylinder. Then, the mesh unit is held by screwing a pin forming the mesh unit into a female screw portion provided at the center of the cylindrical portion of the nozzle.

特許文献４に記載のノズルは、ノズルの筒部内にメッシュ体を挿入し、メッシュ体の周縁部に切欠部を設け、その周縁部を折り曲げ、メッシュ体の折り曲げによる反発力で筒部内にメッシュ体を保持するものである。 In the nozzle described in Patent Document 4, a mesh body is inserted into a cylindrical portion of the nozzle, a notch portion is provided in a peripheral portion of the mesh body, the peripheral portion is bent, and a repulsive force caused by the bending of the mesh body causes the mesh body to enter the cylindrical portion. Is to hold.

特開2002-321707JP2002-321707 特開2011-57268JP2011-57268 特開2001-225808JP2001-225808 特開2003-112708JP2003-112708

特許文献１に記載のノズルにあっては、ノズルの筒部の先端内縁部を折り返したメッシュ取付部が、ノズル内における液流通部の内壁の段差となる。この段差により、ノズルから吐出される液体の流れ（液柱）の表面が乱れ、この液柱を乱れのない層流とすることが困難になる。また、メッシュ取付部の折り返しによって液流通部の流路面積が小さく、液柱の流速が増加してしまい、液柱が容器底部に衝突する際の打撃力を低減できない。 In the nozzle described in Patent Document 1, the mesh attachment portion that is the folded inner end portion of the tip of the cylindrical portion of the nozzle is a step on the inner wall of the liquid circulation portion in the nozzle. Due to this step, the surface of the liquid flow (liquid column) discharged from the nozzle is disturbed, and it becomes difficult to make this liquid column a laminar flow without any disturbance. Further, the flow path area of the liquid circulation portion is small due to the folding of the mesh attachment portion, the flow velocity of the liquid column is increased, and the striking force when the liquid column collides with the bottom of the container cannot be reduced.

特許文献２に記載のノズルにあっては、ノズルの筒部内にメッシュの環状ケースを保持しており、ノズル内における液流通部の流路面積が小さく、ノズルから吐出される液柱の流速が増加してしまい、液柱が容器底部に衝突する際の打撃力を低減できない。また、ノズルの本体筒部と先端筒部とを接続する外周フランジ部がノズルの外径を大きくし、ノズルを容器内に挿入する液面追従充填を困難にする。 In the nozzle described in Patent Document 2, a mesh annular case is held in the cylindrical portion of the nozzle, the flow area of the liquid circulation portion in the nozzle is small, and the flow rate of the liquid column discharged from the nozzle is small. The impact force when the liquid column collides with the bottom of the container cannot be reduced. Moreover, the outer peripheral flange part which connects the main body cylinder part and the front-end | tip cylinder part of a nozzle enlarges the outer diameter of a nozzle, and makes the liquid level follow-up filling which inserts a nozzle in a container difficult.

特許文献３に記載のノズルにあっては、ノズルの筒部に収容されるメッシュユニットを形成するため、メッシュの中央孔に通したピンがノズル内における液流通部の流路面積を小さくし、ノズルから吐出される液柱の流速を増加してしまい、液柱が容器底部に衝突する際の打撃力を低減できない。また、メッシュユニットの外径が上記ピンの存在により大きく、ひいてはノズルの外径が大きくなり、ノズルを容器内に挿入する液面追従充填を困難にする。 In the nozzle described in Patent Document 3, in order to form a mesh unit accommodated in the cylindrical portion of the nozzle, a pin that passes through the center hole of the mesh reduces the flow area of the liquid circulation portion in the nozzle, The flow velocity of the liquid column discharged from the nozzle is increased, and the striking force when the liquid column collides with the bottom of the container cannot be reduced. In addition, the outer diameter of the mesh unit is large due to the presence of the pin, and as a result, the outer diameter of the nozzle is increased, which makes it difficult to follow and fill the liquid surface by inserting the nozzle into the container.

特許文献４に記載のノズルにあっては、ノズルの筒部内壁面付近で、メッシュ体が折り曲げによって斜め上向きになっている。メッシュ体を液流通方向から見るとき、メッシュ体の折り曲げ部における目開き（開口面積）が小さく、液柱の流速が阻害される。これにより、ノズルの筒部内壁面付近における液柱の流速が低下し、この液柱を乱れのない層流とすることが困難になる。 In the nozzle described in Patent Document 4, the mesh body is inclined upward by bending near the inner wall surface of the cylindrical portion of the nozzle. When the mesh body is viewed from the liquid flow direction, the mesh opening (opening area) in the bent portion of the mesh body is small, and the flow rate of the liquid column is hindered. Thereby, the flow velocity of the liquid column in the vicinity of the inner wall surface of the cylindrical portion of the nozzle is lowered, and it becomes difficult to make this liquid column a laminar flow without turbulence.

即ち、特許文献１〜４に記載のノズルにあっては、ノズルの筒部内へのメッシュの保持構造によってノズル内における液流通部の内壁面に段差を発生し、内壁面付近の液柱の流速を低下して液柱表面の流れを乱し、この液柱を乱れのない層流とすることを困難にする。また、ノズル内における上述の段差等によって液流通部の流路面積を小さくし、ノズルから吐出される液柱の流速を増加してしまい、液柱が容器底部に衝突する際の打撃力を低減できない。逆に、ノズル内における段差等をなくすために、ノズルの外壁面を用いてメッシュを取付ける場合には、ノズルの外径が大きくなり、ノズルを容器内に挿入する液面追従充填を困難にする。 That is, in the nozzles described in Patent Documents 1 to 4, a step is generated on the inner wall surface of the liquid circulation portion in the nozzle due to the mesh holding structure in the cylindrical portion of the nozzle, and the flow velocity of the liquid column near the inner wall surface. Is lowered to disturb the flow on the surface of the liquid column, making it difficult to make this liquid column a laminar flow without disturbance. In addition, the flow passage area of the liquid circulation part is reduced by the above-described step in the nozzle, the flow velocity of the liquid column discharged from the nozzle is increased, and the striking force when the liquid column collides with the bottom of the container is reduced. Can not. Conversely, when attaching a mesh using the outer wall surface of the nozzle in order to eliminate a step in the nozzle, the outer diameter of the nozzle increases, making it difficult to follow and fill the liquid surface by inserting the nozzle into the container. .

本発明は、ノズルの外径が大きくなることなく、またノズル内に段差の突出を生じたり、内径を小さくすることなく、ノズル内にメッシュを設けることができ、ノズルから吐出される液柱を乱れのない層流にすることにある。 The present invention can provide a mesh in the nozzle without increasing the outer diameter of the nozzle, without causing a protrusion in the nozzle, or without reducing the inner diameter. It is to make it a laminar flow without turbulence.

請求項１に係る発明は、複数の筒部を接合してなる液体充填用ノズルであって、相接合している本体筒部と付加筒部の端面間にメッシュの外縁部が挟まれ、付加筒部と付加筒部の端面間に他のメッシュの外縁部が挟まれ、それらの筒部が外周面の側で各メッシュの外縁部とともに相接合しているようにしたものである。 The invention according to claim 1 is a liquid filling nozzle formed by joining a plurality of tubular portions, phase bonding and have that the main body tube portion and the outer edge of the mesh between the end face of the additional tubular portion is rare narrow, additional cylindrical portion and the outer edge of the other mesh between the end face of the additional tubular portion is rare today in which those of the cylindrical portion is to have a phase joined with the outer edge of the mesh on the side of the outer peripheral surface.

本発明によれば、ノズルの外径が大きくなることなく、また、ノズル内に段差の突出を生じたり、内径を小さくすることなく、ノズル内にメッシュを設けることができ、ノズルから吐出される液柱を乱れのない層流にすることができる。これにより、容器に液体を充填する際に、容器内の泡立ち発生を抑制することができる。 According to the present invention, the mesh can be provided in the nozzle without increasing the outer diameter of the nozzle, without causing a protrusion in the nozzle, or without reducing the inner diameter, and is discharged from the nozzle. The liquid column can be made laminar without disturbance. Thereby, when filling a container with a liquid, generation | occurrence | production of foam in a container can be suppressed.

また、ノズルの外径が大きくなることがないから、ノズルを容器内に挿入する液面追従充填も容易になる。 Further, since the outer diameter of the nozzle does not increase, liquid level follow-up filling in which the nozzle is inserted into the container is facilitated.

尚、本明細書において、層流とは、「各瞬間的の速度は時間的に変化しない（機械工学便覧改訂第６版〔分冊８〕）」状態であり、一般には流体の流線（流れの速度の方向）が管の軸方向や全体の流れ方向と同一に平行であるものをいう。本発明では、ノズル（管）から排出された液（液柱）についてもこの文言を用いる。 In this specification, the laminar flow is a state in which “the instantaneous speed does not change with time (Mechanical Engineering Handbook, Rev. 6 [Volume 8]”), and is generally a fluid streamline (flow The direction of the velocity of the pipe is parallel to the axial direction of the pipe and the entire flow direction. In the present invention, this terminology is also used for the liquid (liquid column) discharged from the nozzle (tube).

図１２、１３において、（Ａ）はノズル内を流れる液柱の中心軸を通る縦断面の流速分布を示し、（Ｂ）は液柱表面（液柱外周面）の流れの様子を示す。図１２は液柱の中央部も表面でも速度が同一な層流を示し、図１３は液柱の中央部よりも表面の速度が小さい層流を示す。図１２では流れは安定で、液柱の表面に乱れはない。図１３では、液柱の表面では流速に差があるため、表面付近の流れが不安定で、表面に微小に波打ちする現象が認められる。本発明では、図１２のような状態を「乱れのない層流」と表現する。 12 and 13, (A) shows the flow velocity distribution of the longitudinal section passing through the central axis of the liquid column flowing in the nozzle, and (B) shows the flow state on the surface of the liquid column (liquid column outer peripheral surface). FIG. 12 shows a laminar flow having the same velocity at both the central part and the surface of the liquid column, and FIG. 13 shows a laminar flow having a lower surface velocity than the central part of the liquid column. In FIG. 12, the flow is stable and the surface of the liquid column is not disturbed. In FIG. 13, since there is a difference in flow velocity on the surface of the liquid column, a phenomenon in which the flow near the surface is unstable and slightly undulates on the surface is observed. In the present invention, the state shown in FIG. 12 is expressed as “a laminar flow without disturbance”.

図１は液体充填装置を示す模式図である。FIG. 1 is a schematic view showing a liquid filling apparatus. 図２は液面追従充填状態を示す模式図である。FIG. 2 is a schematic diagram showing a liquid level following filling state. 図３はノズルを示し、（Ａ）は正面図、（Ｂ）は下面図である。FIG. 3 shows a nozzle, (A) is a front view, and (B) is a bottom view. 図４はノズルを示す断面図である。FIG. 4 is a sectional view showing the nozzle. 図５はノズルの溶接構造を示し、（Ａ）は図４のＡ部の拡大断面図、（Ｂ）は図４のＢ部の拡大断面図である。FIG. 5 shows a welding structure of the nozzle, (A) is an enlarged cross-sectional view of part A of FIG. 4, and (B) is an enlarged cross-sectional view of part B of FIG. 図６はノズルの溶接工程を示す断面図である。FIG. 6 is a cross-sectional view showing a nozzle welding process. 図７はノズルの他の例を示し、（Ａ）は正面図、（Ｂ）は下面図である。FIG. 7 shows another example of the nozzle, where (A) is a front view and (B) is a bottom view. 図８はノズルを示す断面図である。FIG. 8 is a sectional view showing the nozzle. 図９はノズルのろう付構造を示し、（Ａ）は図８のＡ部の拡大断面図、（Ｂ）は図８のＢ部の拡大断面図である。9 shows the brazing structure of the nozzle, (A) is an enlarged sectional view of part A of FIG. 8, and (B) is an enlarged sectional view of part B of FIG. 図１０はノズルのろう付工程を示す断面図である。FIG. 10 is a cross-sectional view showing a nozzle brazing process. 図１１は本発明例と比較例における液柱の流れ状態を示す模式図である。FIG. 11 is a schematic diagram showing the flow state of the liquid column in the present invention example and the comparative example. 図１２は液柱の表面に乱れのない層流を示す模式図である。FIG. 12 is a schematic diagram showing a laminar flow without disturbance on the surface of the liquid column. 図１３は液柱の表面に微小な波打ちを生じた層流を示す模式図である。FIG. 13 is a schematic diagram showing a laminar flow in which minute undulations are generated on the surface of the liquid column.

図１に示す液体充填装置１０は、充填液タンクに貯留されている液体を加圧装置１１により送液管１２を経てノズル２０に液送する。充填液タンクは、加圧装置１１の上流に配置されたり、加圧装置１１そのものにより構成されたりする。加圧装置１１として、ピストン式の加圧装置、重力による加圧装置、空気圧による加圧装置等が採用できる。 The liquid filling device 10 shown in FIG. 1 feeds the liquid stored in the filling liquid tank to the nozzle 20 via the liquid feeding pipe 12 by the pressurizing device 11. The filling liquid tank is arranged upstream of the pressurizing device 11 or is constituted by the pressurizing device 11 itself. As the pressurizing device 11, a piston-type pressurizing device, a pressurizing device using gravity, a pressurizing device using air pressure, or the like can be adopted.

液体充填装置１０において、ノズル２０は昇降装置１３により降下、上昇される。昇降装置１３はカム等の機械的制御や、サーボモータ等による電気的制御により動作する。ノズル２０の内部又は送液管１２には、液体充填の開始や停止を制御する開閉バルブ１４を有している。 In the liquid filling device 10, the nozzle 20 is lowered and raised by the lifting device 13. The elevating device 13 operates by mechanical control of a cam or the like, or electrical control by a servo motor or the like. The nozzle 20 or the liquid feeding pipe 12 has an open / close valve 14 for controlling the start and stop of liquid filling.

液体充填装置１０は、図２に示す如くの液面追従充填動作を行なう。
液体充填装置１０による充填開始前、図２（Ａ）に示す如く、ノズル２０の先端が容器１の口部（液充填口）１Ａから挿入され、ノズル２０の先端は容器１内の底部１Ｂ近くまで降下させられる。ノズル２０の先端から容器１の底部１Ｂまでの距離を短くすることで、液体が容器１の底部１Ｂに衝突する際の打撃力を低減でき、充填開始時の泡立ちを抑制できる。ノズル２０の先端が所定の位置に降下すると、液体充填装置１０によって充填が開始される。 The liquid filling apparatus 10 performs a liquid level following filling operation as shown in FIG.
Prior to the start of filling by the liquid filling device 10, as shown in FIG. 2A, the tip of the nozzle 20 is inserted from the mouth (liquid filling port) 1A of the container 1, and the tip of the nozzle 20 is near the bottom 1B in the container 1. Can be lowered. By shortening the distance from the tip of the nozzle 20 to the bottom 1B of the container 1, the striking force when the liquid collides with the bottom 1B of the container 1 can be reduced, and foaming at the start of filling can be suppressed. When the tip of the nozzle 20 is lowered to a predetermined position, the liquid filling device 10 starts filling.

液体充填装置１０による充填開始と同時、又は僅かに遅れて、図２（Ｂ）に示す如く、ノズル２０の先端と容器１内の液面との距離が概ね一定となるようにノズル２０は上昇する（液面追従充填）。この距離を短く、かつ一定に保つことで、充填途中の液面の泡立ちを抑制できる。一例として、この距離は約10mmに保たれる。距離を一定に保つために、液面部の容器断面積の変化も鑑みながら、充填液の流量やノズル２０の上昇速度が制御される。 At the same time as the start of filling by the liquid filling apparatus 10 or slightly behind, the nozzle 20 is raised so that the distance between the tip of the nozzle 20 and the liquid level in the container 1 is substantially constant, as shown in FIG. (Liquid level following filling). By keeping this distance short and constant, foaming of the liquid surface during filling can be suppressed. As an example, this distance is kept at about 10 mm. In order to keep the distance constant, the flow rate of the filling liquid and the rising speed of the nozzle 20 are controlled in consideration of the change in the container cross-sectional area of the liquid surface portion.

液体充填装置１０による充填終了後、図２（Ｃ）に示す如く、ノズル２０の先端が容器１の外に達するまで、ノズル２０は上昇させられる。 After completion of filling by the liquid filling device 10, the nozzle 20 is raised until the tip of the nozzle 20 reaches the outside of the container 1 as shown in FIG.

以下、ノズル２０の構造及び製造方法について説明する。
ノズル２０は、図３又は図７に示す如く、複数の筒部２１、２２を接合してなるものであり、具体的には送液管１２又は開閉バルブ１４に接続される本体筒部２１と１個又は複数の付加筒部２２からなり、それらの各筒部２１、２２を順に接合して構成される。複数の筒部２１、２２は互いに同一外径、同一内径をなし、同軸配置される。または、複数の筒部２１、２２は、それぞれの外径または内径、あるいはその両方が高さ方向に変化するテーパー筒形状で、その接合部が互いに概同一外径、概同一内径をなし、同軸配置される。尚、ノズル２０の先端部でノズル出口を形成する付加筒部２２は先端筒部２２Ａを構成する。 Hereinafter, the structure and manufacturing method of the nozzle 20 will be described.
As shown in FIG. 3 or FIG. 7, the nozzle 20 is formed by joining a plurality of cylindrical portions 21, 22. Specifically, the nozzle 20 includes a main body cylindrical portion 21 connected to the liquid feeding pipe 12 or the open / close valve 14. It consists of one or a plurality of additional cylinder portions 22 and is configured by joining the cylinder portions 21 and 22 in order. The plurality of cylindrical portions 21 and 22 have the same outer diameter and the same inner diameter, and are arranged coaxially. Alternatively, each of the plurality of cylindrical portions 21 and 22 has a tapered cylindrical shape in which the outer diameter or the inner diameter or both of them change in the height direction, and the joint portions thereof have substantially the same outer diameter and substantially the same inner diameter, and are coaxial. Be placed. The additional cylinder part 22 that forms the nozzle outlet at the tip part of the nozzle 20 constitutes the tip cylinder part 22A.

ここで、図３に示したノズル２０にあっては、図４、図５に示す如く、各筒部２１、２２を溶接により接合したものであり、相接合される本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間にメッシュ２３の外縁部を挟み、それらの筒部２１、２２が外周面の側でメッシュ２３の外縁部とともに、溶接部（一体化部）３１により相接合される。相接合される筒部２１、２２の内周面の側では、メッシュ２３の外縁部を挟んでいる本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間に空隙３２が形成されるものとする。 Here, in the nozzle 20 shown in FIG. 3, as shown in FIGS. 4 and 5, the cylinder parts 21 and 22 are joined by welding, and the main body cylinder part 21 and the additional cylinder to be phase-joined. The outer edge portion of the mesh 23 is sandwiched between the end surfaces of the portion 22 or between the end surfaces of the additional tube portion 22 and the additional tube portion 22, and these tube portions 21 and 22 are welded together with the outer edge portion of the mesh 23 on the outer peripheral surface side. (Integrated part) 31 is phase-bonded. On the inner peripheral surface side of the cylindrical portions 21, 22 to be phase-joined, between the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22 sandwiching the outer edge portion of the mesh 23, or between the additional cylindrical portion 22 and the additional cylindrical portion 22. It is assumed that a gap 32 is formed between the end faces.

尚、ノズル２０にあっては、本体筒部２１と先端筒部２２Ａの端面間にメッシュ２３を挟んだ１段メッシュ構造のもの、又は本体筒部２１と付加筒部２２の端面間にメッシュ２３を挟み、付加筒部２２と付加筒部２２の端面間に他のメッシュ２３を挟んだ多段メッシュ構造のものを構成できる。 The nozzle 20 has a one-stage mesh structure in which the mesh 23 is sandwiched between the end surfaces of the main body cylindrical portion 21 and the tip cylindrical portion 22A, or the mesh 23 between the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22. And a multi-stage mesh structure in which another mesh 23 is sandwiched between the end surfaces of the additional cylinder portion 22 and the additional cylinder portion 22.

ノズル２０を上述の溶接により製造する工程は以下の通りである。
（工程１）（図６（Ａ））
相接合される本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間にメッシュ２３の外縁部を挟み、それらの筒部２１、２２の外周面の側の周方向複数箇所で、本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間をスポット溶接して点留めし、点留部３１Ａを形成する。 The process of manufacturing the nozzle 20 by the above-described welding is as follows.
(Step 1) (FIG. 6A)
The outer edge portion of the mesh 23 is sandwiched between the end surfaces of the main body cylinder portion 21 and the additional cylinder portion 22 to be phase-joined or between the end surfaces of the additional cylinder portion 22 and the additional cylinder portion 22, and Spot welding is performed by spot-welding between the end surfaces of the main body cylinder portion 21 and the additional cylinder portion 22 or between the end surfaces of the additional cylinder portion 22 and the additional cylinder portion 22 at a plurality of locations in the circumferential direction on the side, thereby forming the point retaining portion 31A. .

（工程２）（図６（Ｂ））
工程１で点留めされた筒部２１、２２の外周面の側から、本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間を溶接する。これにより、相接合される本体筒部２１と付加筒部２２の端面間で、本体筒部２１の端面と付加筒部２２の端面とメッシュ２３の外縁部を溶接して一体化し、溶接部（一体化部）３１を形成するとともに、相接合される付加筒部２２と付加筒部２２の端面間で、付加筒部２２の端面と付加筒部２２の端面とメッシュ２３の外縁部を溶接して一体化し、溶接部（一体化部）３１を形成する。 (Step 2) (FIG. 6B)
From the outer peripheral surface side of the cylindrical portions 21, 22 pointed at step 1, the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22, or the end surfaces of the additional cylindrical portion 22 and the additional cylindrical portion 22 are welded. Thereby, the end surface of the main body cylinder part 21, the end surface of the additional cylinder part 22, and the outer edge part of the mesh 23 are welded and integrated between the end surfaces of the main body cylinder part 21 and the additional cylinder part 22 to be phase-joined. (Integral portion) 31 is formed, and the end surface of the additional cylinder portion 22, the end surface of the additional cylinder portion 22 and the outer edge portion of the mesh 23 are welded between the end surfaces of the additional cylinder portion 22 and the additional cylinder portion 22 to be joined together. To form a welded portion (integrated portion) 31.

相接合される本体筒部２１と付加筒部２２の端面間の溶接部（一体化部）３１、又は相接合される付加筒部２２と付加筒部２２の端面間の溶接部（一体化部）３１を形成する溶接方法は、ガス溶接、アーク溶接、電子ビーム溶接、レーザー溶接等、特に限定されないが、溶融した一体化部が筒部２１、２２の内周面の側にまで達してノズル内周面に段差が突出することのないよう（換言すれば、筒部２１、２２の内周面の側で、それらの端面間に空隙３２が形成されるように）、かつそれらの筒部２１、２２を外周面の側では必ず一体化させる高精度の溶接技術が必要であり、特にアーク溶接の一種である精密TIG溶接が好ましい。筒部２１、２２を内周面の側まで一体化させると、筒部２１、２２の内周面付近に位置するメッシュ２３のメッシュ孔（目開き）２３Ａが塞がれることになり、筒部２１、２２の内周面付近の液流速が低下し、層流が乱れてしまう。相接合される本体筒部２１と付加筒部２２の端面間の溶接部（一体化部）３１、又は相接合される付加筒部２２と付加筒部２２の端面間の溶接部（一体化部）３１が筒部２１、２２の外周面の側で一体化していないと液が漏れる。このような高精度な溶接技術として、本体筒部２１や付加筒部２２の中心軸が回転中心になるように把持し、これを一定速度で回転しながら筒部２１、２２の外周面の側から溶接を行なえば、一定量の溶接部（一体化部）３１を形成できる。逆に、本体筒部２１や付加筒部２２を固定し、溶接装置の側をロボット等で動かし、正確に筒部２１、２２の外周面の溶接箇所に沿う溶接を行なっても良い。 A welded portion (integrated portion) 31 between the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22 to be phase-joined, or a welded portion (integrated portion) between the end surfaces of the additional cylindrical portion 22 and the additional cylindrical portion 22 to be phase-joined. ) The welding method for forming 31 is not particularly limited, such as gas welding, arc welding, electron beam welding, laser welding, etc., but the melted integrated portion reaches the inner peripheral surface side of the cylindrical portions 21 and 22 and is a nozzle. Steps do not protrude from the inner peripheral surface (in other words, the air gap 32 is formed between the end surfaces on the inner peripheral surface side of the cylindrical portions 21, 22), and the cylindrical portions. A high-precision welding technique that always integrates 21 and 22 on the outer peripheral surface side is necessary, and precision TIG welding, which is a kind of arc welding, is particularly preferable. When the cylindrical portions 21 and 22 are integrated to the inner peripheral surface side, the mesh holes (openings) 23A of the mesh 23 located in the vicinity of the inner peripheral surfaces of the cylindrical portions 21 and 22 are closed, and the cylindrical portion The liquid flow velocity in the vicinity of the inner peripheral surfaces of 21 and 22 is lowered, and the laminar flow is disturbed. A welded portion (integrated portion) 31 between the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22 to be phase-joined, or a welded portion (integrated portion) between the end surfaces of the additional cylindrical portion 22 and the additional cylindrical portion 22 to be phase-joined. ) If the 31 is not integrated on the outer peripheral surface side of the cylindrical portions 21 and 22, the liquid leaks. As such a high-precision welding technique, the main body cylinder portion 21 and the additional cylinder portion 22 are gripped so that the central axis is the center of rotation, and the outer peripheral surface side of the cylinder portions 21 and 22 is rotated at a constant speed. If welding is performed from the above, a certain amount of welded portion (integrated portion) 31 can be formed. On the contrary, the main body cylinder portion 21 and the additional cylinder portion 22 may be fixed, and the welding apparatus side may be moved by a robot or the like to perform welding along the welded portions of the outer peripheral surfaces of the cylinder portions 21 and 22 accurately.

（工程３）（図６（Ｃ））
相接合される本体筒部２１と付加筒部２２の端面間の溶接部（一体化部）３１、又は相接合される付加筒部２２と付加筒部２２の端面間の溶接部（一体化部）３１において、筒部２１、２２の外周面から盛り上がった溶接肉盛部３１Ｂ（図６（Ｂ））は、切削、研磨、バフ仕上げ等により平らに加工される。 (Step 3) (FIG. 6C)
A welded portion (integrated portion) 31 between the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22 to be phase-joined, or a welded portion (integrated portion) between the end surfaces of the additional cylindrical portion 22 and the additional cylindrical portion 22 to be phase-joined. ) 31, the weld overlay 31 </ b> B (FIG. 6B) raised from the outer peripheral surface of the cylindrical portions 21 and 22 is processed flat by cutting, polishing, buffing, or the like.

以上のような溶接構造、溶接工程でノズル２０を製造することにより、ノズル２０の外径が大きくなることなく、またノズル２０の出口付近や出口に近いノズル内に段差の突出（突起）を生じたり、内径を小さくすることなく、ノズル内にメッシュ２３を設けることができ、ノズル２０から吐出される液柱を乱れのない層流にすることができる。 By manufacturing the nozzle 20 by the welding structure and the welding process as described above, the outer diameter of the nozzle 20 is not increased, and a protrusion (protrusion) is formed in the vicinity of the outlet of the nozzle 20 or in the nozzle close to the outlet. In addition, the mesh 23 can be provided in the nozzle without reducing the inner diameter, and the liquid column discharged from the nozzle 20 can be made into a laminar flow without disturbance.

また、図７で示したノズル２０にあっては、図８、図９に示す如く、各筒部２１、２２の接合がろうを介したろう付によるものであり、相接合される本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間にメッシュ２３の外縁部を挟み、それらの筒部２１、２２が外周面の側でメッシュ２３の外縁部とともに、ろう付部（一体化部）４１により相接合される。相接合される筒部２１、２２の内周面の側では、メッシュ２３の外縁部を挟んでいる本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間に空隙４２が形成されるものとする。 Further, in the nozzle 20 shown in FIG. 7, as shown in FIGS. 8 and 9, the cylindrical portions 21 and 22 are joined by brazing via the brazing, and the main body cylindrical portions 21 to be phase-joined. The outer edge portion of the mesh 23 is sandwiched between the end surfaces of the additional cylinder portion 22 and between the end surfaces of the additional cylinder portion 22 and the additional cylinder portion 22, and these cylinder portions 21, 22 are on the outer peripheral surface side together with the outer edge portion of the mesh 23. The phase bonding is performed by the brazing part (integrated part) 41. On the inner peripheral surface side of the cylindrical portions 21, 22 to be phase-joined, between the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22 sandwiching the outer edge portion of the mesh 23, or between the additional cylindrical portion 22 and the additional cylindrical portion 22. It is assumed that a gap 42 is formed between the end faces.

ノズル２０を上述のろう付により製造する工程は以下の通りである。
（工程１）（図１０（Ａ））
相接合される本体筒部２１と付加筒部２２の端面間、又は付加筒部２２と付加筒部２２の端面間にメッシュ２３の外縁部を挟み、それらの端面間の周囲に配置されるアウタリング４３でそれらの筒部２１、２２を仮固定する。アウタリング４３と筒部２１、２２の外周面とのクリアランスは0.5〜1.0mm程度とする。アウタリング４３の厚みは、薄いほどノズル２０の外径を小さくでき、例えば厚み0.5〜1.5mmのものが採用される。 The process of manufacturing the nozzle 20 by the above-described brazing is as follows.
(Step 1) (FIG. 10A)
The outer edge portion of the mesh 23 is sandwiched between the end surfaces of the main body cylinder portion 21 and the additional cylinder portion 22 to be phase-joined or between the end surfaces of the additional cylinder portion 22 and the additional cylinder portion 22, and is arranged around the end surfaces. The cylindrical portions 21 and 22 are temporarily fixed by the ring 43. The clearance between the outer ring 43 and the outer peripheral surfaces of the cylindrical portions 21 and 22 is about 0.5 to 1.0 mm. As the thickness of the outer ring 43 is reduced, the outer diameter of the nozzle 20 can be reduced. For example, a thickness of 0.5 to 1.5 mm is employed.

ろう付の下準備として、ろう付を行なう部分にフラックスを塗布しておくことにより、ろう付を行ないたくない部分、即ち、筒部２１、２２の内周面の側にまでろうが流れ込むことを防止できる。フラックスを塗布する場所としては、アウタリング４３の内周面、筒部２１、２２の外周面、筒部２１、２２の端面（より好ましくは筒部２１、２２の端面の外周側）、メッシュ２３の外縁部である。 As a preparation for brazing, by applying a flux to a portion to be brazed, the brazing flows into a portion where brazing is not desired, that is, to the inner peripheral surface side of the cylindrical portions 21 and 22. Can be prevented. The places where the flux is applied include the inner peripheral surface of the outer ring 43, the outer peripheral surfaces of the cylindrical portions 21 and 22, the end surfaces of the cylindrical portions 21 and 22 (more preferably, the outer peripheral side of the end surfaces of the cylindrical portions 21 and 22), and the mesh 23. It is the outer edge part.

（工程２）（図１０（Ｂ））
筒部２１、２２、メッシュ２３、アウタリング４３のろうが流し込まれる部分を加熱し、アウタリング４３が筒部２１、２２の外周面に対してなすクリアランスからろうを流し込む。 (Step 2) (FIG. 10B)
The portions of the cylindrical portions 21 and 22, the mesh 23, and the outer ring 43 are heated, and the wax is poured from the clearance that the outer ring 43 forms with respect to the outer peripheral surfaces of the cylindrical portions 21 and 22.

ろうは硬ろうであり、本体筒部２１や付加筒部２２の材質等から最適なものが選ばれるが、例えば、銀ろうが使用される。工程１で塗布したフラックスの塗布場所が限定されているため、ろうは筒部２１、２２の内周面の側にまで流れ込むことがなく、筒部２１、２２の内周面に段差の突出を生じたり、筒部２１、２２の内周面付近に位置するメッシュ２３のメッシュ孔２３Ａを塞ぐこともない。筒部２１、２２の外周面の側では、相接合される本体筒部２１と付加筒部２２の端面間で、本体筒部２１の端面と付加筒部２２の端面とメッシュ２３の外縁部がろう付部４１を介して一体化されるとともに、相接合される付加筒部２２と付加筒部２２の端面間で、両付加筒部２２の端面とメッシュ２３の外縁部がろう付部４１を介して一体化される。本体筒部２１、付加筒部２２、アウタリング４３に、はみ出したろうは、切削、研磨、バフ仕上げ等により滑らかに加工される。また、アウタリング４３を外周側から削り込み、ノズル外径をより小さくすることも可能である。 The wax is a hard wax, and an optimal one is selected from the material of the main body cylinder part 21 and the additional cylinder part 22, and for example, a silver solder is used. Since the application location of the flux applied in step 1 is limited, the wax does not flow to the inner peripheral surface side of the cylindrical portions 21 and 22, and a protrusion of a step is formed on the inner peripheral surfaces of the cylindrical portions 21 and 22. It does not occur or does not block the mesh hole 23A of the mesh 23 located in the vicinity of the inner peripheral surface of the cylindrical portions 21 and 22. On the outer peripheral surface side of the cylindrical portions 21, 22, the end surface of the main body cylindrical portion 21, the end surface of the additional cylindrical portion 22, and the outer edge portion of the mesh 23 are between the end surfaces of the main body cylindrical portion 21 and the additional cylindrical portion 22 to be phase-joined. The brazing portion 41 is integrated via the brazing portion 41 and the end surfaces of the additional cylindrical portion 22 and the outer edge portion of the mesh 23 are connected to the brazing portion 41 between the additional cylindrical portion 22 and the end surface of the additional cylindrical portion 22 to be phase-joined. Integrated. The wax that protrudes from the main body cylinder portion 21, the additional cylinder portion 22, and the outer ring 43 is processed smoothly by cutting, polishing, buffing, or the like. It is also possible to cut the outer ring 43 from the outer peripheral side to make the nozzle outer diameter smaller.

以上のようなろう付構造、ろう付工程でノズル２０を製造することにより、ノズル２０の外径が大きくなることなく、またノズル２０の出口付近や出口に近いノズル内に段差の突出（突起）を生じたり、内径を小さくすることなく、ノズル内にメッシュ２３を設けることができ、ノズル２０から吐出される液柱を乱れのない層流にすることができる。 By manufacturing the nozzle 20 by the brazing structure and the brazing process as described above, the outer diameter of the nozzle 20 is not increased, and a protrusion (protrusion) is formed in the vicinity of the outlet of the nozzle 20 or in the nozzle close to the outlet. The mesh 23 can be provided in the nozzle without causing a decrease in the inner diameter, and the liquid column discharged from the nozzle 20 can be made into a laminar flow without disturbance.

以上の溶接やろう付により複数の筒部２１、２２が接合されてなるノズル２０の詳細構造について説明する。 A detailed structure of the nozzle 20 in which the plurality of cylindrical portions 21 and 22 are joined by the above welding or brazing will be described.

ノズル２０は、ノズル内周面に段差の突出（突起）がなく、ノズル出口から吐出される液（液柱）が乱れのない層流になる。ノズル外周面にも突起はなく、ろう付の場合にアウタリング４３の厚み分だけノズル外径ａが大きくなるが、極僅かな外径の増加であり、ノズル２０を容器１の口部１Ａに挿入する液面追従充填が可能になる。メッシュ２３を環状ケースに収めてノズル内に組込むことなく、メッシュ２３を本体筒部２１や付加筒部２２と一体化しているので、メッシュ２３の液流通部の直径をノズル内径ｂと同一の最大にし、ノズル２０の液流通部の断面積が大きく確保でき、流量を低下させることなくノズル出口から吐出される液柱の流速を低減し、その流速の増加を抑制できる。 The nozzle 20 has no stepped protrusions (protrusions) on the inner peripheral surface of the nozzle, and the liquid (liquid column) discharged from the nozzle outlet is a laminar flow without any disturbance. There are no projections on the outer peripheral surface of the nozzle, and in the case of brazing, the outer diameter a of the nozzle is increased by the thickness of the outer ring 43. However, the outer diameter is slightly increased, and the nozzle 20 is placed in the mouth 1A of the container 1. Liquid level following filling becomes possible. Since the mesh 23 is integrated with the main body cylinder part 21 and the additional cylinder part 22 without the mesh 23 being housed in an annular case and incorporated in the nozzle, the diameter of the liquid circulation part of the mesh 23 is the same as the nozzle inner diameter b. In addition, a large cross-sectional area of the liquid circulation portion of the nozzle 20 can be secured, the flow rate of the liquid column discharged from the nozzle outlet can be reduced without reducing the flow rate, and an increase in the flow rate can be suppressed.

ノズル２０のノズル外径ａ、ノズル内径ｂは、容器１の充填容量、充填に必要な時間、液面追従充填の場合は容器１の口部１Ａの内径等によって適宜定められる。一例として小型200mL容量の容器１にて、液面追従充填を行なう際のノズル２０として、ノズル外径ａ：16mm、ノズル内径ｂ：14mmとされる。ノズル厚み（ａ−ｂ／2）は、筒部２１、２２の上述の一体化加工時に、筒部２１、２２をそれらの外周面の側のみで接合一体化させることができる厚みが必要であるが、厚すぎるとノズル内径ｂが小さくなって液流速が増大してしまう。ノズル厚みは好ましくは0.7〜2.5mm、より好ましくは0.9〜2.0mmとされる。筒部２１、２２は、通常は加工のし易さや、液面追従充填時の容器１の口部１Ａの形状に合せて、真円とすることが一般的である。しかしながら容器１の口部１Ａの真円以外の例えば楕円等の特別な充填口形状に合せた、真円とは異なる形状としても良い。 The nozzle outer diameter a and nozzle inner diameter b of the nozzle 20 are appropriately determined depending on the filling capacity of the container 1, the time required for filling, the inner diameter of the mouth 1A of the container 1 in the case of liquid level follow-up filling, and the like. As an example, the nozzle 20 used for liquid level following filling in a small 200 mL capacity container 1 has a nozzle outer diameter a: 16 mm and a nozzle inner diameter b: 14 mm. The nozzle thickness (ab-2) needs to be a thickness that allows the cylindrical portions 21 and 22 to be joined and integrated only on the outer peripheral surface side when the cylindrical portions 21 and 22 are integrated. However, if it is too thick, the nozzle inner diameter b becomes smaller and the liquid flow rate increases. The nozzle thickness is preferably 0.7 to 2.5 mm, more preferably 0.9 to 2.0 mm. The cylindrical portions 21 and 22 are generally made into perfect circles according to the ease of processing and the shape of the mouth portion 1A of the container 1 at the time of liquid level follow-up filling. However, it may have a shape different from the perfect circle according to a special filling mouth shape such as an ellipse other than the perfect circle of the mouth portion 1A of the container 1.

ノズル２０を構成する筒部２１、２２の材質は金属が好ましく、特に腐食に強いものであれば材質は限定されない。例えば、ステンレス材のSUS304、SUS316、SUS316L等が選択される。尚、レーザー溶接によれば、精密な溶接が可能で、樹脂材料も使用できる。メッシュ２３の材質も金属が好ましく、特に腐食に強いものであれば材質は限定されない。例えば、ステンレス材のSUS304、SUS316、SUS316L等が選択される。ろう付の場合には、金属に限定されないが、ろう付時の温度で燃焼したり極度に強度の低下するものは避けることが好ましい。尚、レーザー溶接によれば樹脂材料と金属材料を接合することもできる。また、電子ビーム溶接によれば、更に精密な溶接が可能で、チタンなどの難溶接材料の溶接も可能である。 The material of the cylindrical portions 21 and 22 constituting the nozzle 20 is preferably a metal, and the material is not limited as long as it is particularly resistant to corrosion. For example, stainless steel SUS304, SUS316, SUS316L, or the like is selected. In addition, according to laser welding, precise welding is possible and a resin material can also be used. The material of the mesh 23 is also preferably a metal, and the material is not limited as long as it is particularly resistant to corrosion. For example, stainless steel SUS304, SUS316, SUS316L, or the like is selected. In the case of brazing, although not limited to metal, it is preferable to avoid those that burn at the temperature at the time of brazing or extremely decrease in strength. In addition, according to laser welding, a resin material and a metal material can also be joined. Further, according to electron beam welding, more precise welding is possible, and welding of difficult-to-weld materials such as titanium is also possible.

ノズル２０を構成するメッシュ２３のサイズは、液粘度や液流速によって適宜選択されるが、一例としてASTM60メッシュ（JIS目開き0.25mm）、40メッシュ、80メッシュ等が使用される。前述した多段メッシュ構造のノズル２０では、異なるメッシュサイズの複数枚のメッシュ２３を組合せても良い。ノズル２０を構成するメッシュ２３の使用枚数は多いほど層流を形成して好ましいが、あまりに多いとノズル２０の液流通部における圧力損失が大きくなり充填液を高い圧力で加圧する必要があり各部の強度アップが求められ、またノズル２０の加工時間や製作費用の面からも不利である。好ましくは2〜10枚程度、より好ましくは3〜6枚程度とするのが良い。 The size of the mesh 23 constituting the nozzle 20 is appropriately selected depending on the liquid viscosity and the liquid flow rate. As an example, ASTM 60 mesh (JIS mesh 0.25 mm), 40 mesh, 80 mesh, or the like is used. In the nozzle 20 having the multistage mesh structure described above, a plurality of meshes 23 having different mesh sizes may be combined. It is preferable to form a laminar flow as the number of the meshes 23 constituting the nozzle 20 is larger. However, if the number is too large, the pressure loss in the liquid circulation portion of the nozzle 20 increases and the filling liquid needs to be pressurized at a high pressure. Strengthening is required, and it is also disadvantageous in terms of processing time and manufacturing cost of the nozzle 20. Preferably it is about 2 to 10 sheets, more preferably about 3 to 6 sheets.

ノズル２０が前述した多段メッシュ構造からなるとき、上下のメッシュ間距離Ｌは、液粘度や液流速によって適宜選択されるが、筒部２１、２２の溶接やろう付のし易さから、好ましくは3〜40mm、より好ましくは5〜25mmにするのが良い。ノズル２０の出口から最先端メッシュ２３の距離Ｅは小さいほど、ノズル内周面の影響によるノズル内周面付近の液流速の低下を抑制できるが、溶接やろう付のし易さから、好ましくは5mm以下、より好ましくは2mm以下にするのが良い。 When the nozzle 20 has the above-described multistage mesh structure, the distance L between the upper and lower meshes is appropriately selected depending on the liquid viscosity and the liquid flow rate, but is preferably from the ease of welding and brazing of the cylindrical portions 21 and 22. The thickness should be 3 to 40 mm, more preferably 5 to 25 mm. The smaller the distance E from the outlet of the nozzle 20 to the most advanced mesh 23, the lower the liquid flow velocity near the nozzle inner peripheral surface due to the influence of the nozzle inner peripheral surface, but preferably from the viewpoint of ease of welding and brazing. It should be 5 mm or less, more preferably 2 mm or less.

本発明例としての上述した溶接やろう付により複数の筒部２１、２２が接合されてなるノズル２０による層流形成効果を、比較例１、２と対比して説明すれば、以下の通りである（図１１）。 The laminar flow forming effect by the nozzle 20 in which the plurality of cylindrical portions 21 and 22 are joined by the above-described welding and brazing as an example of the present invention will be described in comparison with Comparative Examples 1 and 2. There is (FIG. 11).

（本発明例）（図１１（Ａ））
本発明例のノズル２０にあっては、ノズル内の液流通部で、ノズル中心部でもノズル内周面近傍でも、メッシュ２３の同一サイズのメッシュ孔２３Ａの各個から液が流出するため、各メッシュ孔２３Ａを流出する液に及ぶ抵抗が同一になる。これにより、ノズル出口付近に設けた上記メッシュ２３を通過してノズル出口から吐出される液柱は、当該液柱断面の全域で流速を同等にするものになり、乱れのない層流になる。 (Invention Example) (FIG. 11A)
In the nozzle 20 of the example of the present invention, the liquid flows out from each of the mesh holes 23A of the same size in the mesh 23 at the center of the nozzle or in the vicinity of the inner peripheral surface of the nozzle in the liquid circulation portion in the nozzle. The resistance to the liquid flowing out of the hole 23A becomes the same. As a result, the liquid column that passes through the mesh 23 provided near the nozzle outlet and is discharged from the nozzle outlet has the same flow velocity over the entire area of the liquid column cross section, and is a laminar flow that is not disturbed.

（比較例１）（図１１（Ｂ））
比較例１のノズル１００は、本発明例のノズル２０に比してノズル外径及びノズル内径を同一にし、メッシュ２３を設けていない。ノズル内部では、ノズル内周面の影響によって、ノズル内周面近傍の液流速が遅くなる。ノズル出口から吐出される液柱の流速状態も同様となり、層流ではあるが液柱表面には乱れが生じ易い。 (Comparative Example 1) (FIG. 11B)
The nozzle 100 of Comparative Example 1 has the same nozzle outer diameter and nozzle inner diameter as compared with the nozzle 20 of the present invention example, and is not provided with the mesh 23. Inside the nozzle, the liquid flow velocity in the vicinity of the nozzle inner peripheral surface becomes slow due to the influence of the nozzle inner peripheral surface. The flow velocity state of the liquid column discharged from the nozzle outlet is the same, and the surface of the liquid column is likely to be turbulent although it is a laminar flow.

（比較例２）（図１１（Ｃ））
比較例２のノズル２００は、メッシュ２０１を納めた環状ケース２０２をノズル筒部内に保持したものである。ノズル内の液流通部の断面積が環状ケース２０２の分だけ小さくなり、液体の流れの妨げになることから、メッシュ２０１の環状ケース２０２付近の液流速は、ノズル中心部より低下する。これにより、メッシュ２０１のメッシュ孔による速度均一化の効果はある程度あるものの、ノズル出口から吐出される液柱の表面の流速は低下し、層流ではあるが液柱表面には僅かながら乱れが生じ易い。また、液流通部の断面積が本来のノズル内径よりも小さくなることで、ノズル内全域で液流速が増加してしまう。液流通部の断面積を大きくしてその液流速を低下させようとすると、ノズル外径が大きくなる。 (Comparative Example 2) (FIG. 11C)
The nozzle 200 of Comparative Example 2 is one in which an annular case 202 containing a mesh 201 is held in a nozzle cylinder portion. Since the cross-sectional area of the liquid circulation part in the nozzle is reduced by the amount of the annular case 202 and the flow of the liquid is hindered, the liquid flow velocity in the vicinity of the annular case 202 of the mesh 201 is lower than the center part of the nozzle. As a result, although there is a certain level of speed equalization effect due to the mesh holes of the mesh 201, the flow velocity of the surface of the liquid column discharged from the nozzle outlet is reduced, and the surface of the liquid column is slightly disturbed although it is a laminar flow. easy. Further, the liquid flow velocity increases in the entire area of the nozzle because the cross-sectional area of the liquid circulation portion is smaller than the original nozzle inner diameter. When the cross-sectional area of the liquid circulation part is increased to reduce the liquid flow rate, the outer diameter of the nozzle increases.

従って、本発明のノズル２０によれば以下の作用効果を奏する。
(a)複数の筒部２１、２２が外周面の側でメッシュ２３の外縁部とともに相接合されるから、ノズル内周面にメッシュ保持のための段差を突出させない。従って、ノズル内周面付近における液流速がそのような段差に起因して低下することがなく、ノズル出口から吐出される液柱表面の流速が低下することがなく、液柱表面の乱れを生じない。また、ノズル内の液流通部の断面積がそのような段差に起因して小さくなることがないから、ノズル出口から吐出される液柱の流速の増加を流量を低下させることなく抑制し、液柱が容器１の底部１Ｂに衝突する際の打撃力を低減できる。 Therefore, according to the nozzle 20 of the present invention, the following effects can be obtained.
(a) Since the plurality of cylindrical portions 21 and 22 are phase-joined together with the outer edge portion of the mesh 23 on the outer peripheral surface side, a step for retaining the mesh is not projected on the inner peripheral surface of the nozzle. Therefore, the liquid flow velocity in the vicinity of the inner peripheral surface of the nozzle does not decrease due to such a step, the flow velocity of the liquid column surface discharged from the nozzle outlet does not decrease, and the liquid column surface is disturbed. Absent. Further, since the cross-sectional area of the liquid circulation portion in the nozzle does not become small due to such a step, an increase in the flow velocity of the liquid column discharged from the nozzle outlet is suppressed without reducing the flow rate, The striking force when the column collides with the bottom 1B of the container 1 can be reduced.

ノズル内周面にメッシュ保持のための段差の突出を生じず、上述の通り、ノズル内の液流通部の断面積がそのような段差に起因して小さくなることがないから、ノズル出口から吐出される液柱の流速の増加を抑制するために、ノズル外径を大きくしてノズル内の液流通部の断面積を大きくする必要がない。従って、ノズル２０を容器１の口部１Ａに挿入する液面追従充填が容易になる。
以上により、容器１内における液体の泡立ちを抑制できる。 No protrusion of the step for holding the mesh occurs on the inner peripheral surface of the nozzle, and as described above, the cross-sectional area of the liquid circulation part in the nozzle does not become small due to such a step. In order to suppress an increase in the flow velocity of the liquid column, it is not necessary to increase the outer diameter of the nozzle and increase the cross-sectional area of the liquid circulation portion in the nozzle. Therefore, the liquid level following filling for inserting the nozzle 20 into the mouth portion 1A of the container 1 is facilitated.
As described above, foaming of the liquid in the container 1 can be suppressed.

(b)ノズル２０が、相接合される筒部２１、２２の内周面の側では、メッシュ２３の外縁部を挟んでいる筒部２１、２２の端面間に空隙３２、４２が形成されるものとすることにより、ノズル内周面におけるメッシュ保持のための段差の突出を確実に排除するものになる。 (b) On the inner peripheral surface side of the cylindrical portions 21 and 22 where the nozzle 20 is phase-joined, voids 32 and 42 are formed between the end surfaces of the cylindrical portions 21 and 22 sandwiching the outer edge portion of the mesh 23. By doing so, the protrusion of the step for holding the mesh on the inner peripheral surface of the nozzle is surely eliminated.

(c)ノズル２０が本体筒部２１と複数の付加筒部２２からなり、それらの各筒部２１、２２を順に接合してなるものとすることにより、複数枚のメッシュ２３を多段配置した多段メッシュ構造とするものになり、ノズル出口から吐出される液柱を一層確実に乱れのない層流にできる。 (c) The nozzle 20 includes a main body cylinder portion 21 and a plurality of additional cylinder portions 22, and the cylinder portions 21, 22 are joined in order, so that a plurality of meshes 23 are arranged in multiple stages. It becomes a mesh structure, and the liquid column discharged from the nozzle outlet can be more surely made into a laminar flow without turbulence.

本発明によれば、ノズルの外径が大きくなることなく、またノズル内に段差の突出を生じたり、内径を小さくすることなく、ノズル内にメッシュを設けることができ、ノズルから吐出される液柱を乱れのない層流にすることができる。これにより、容器に液体を充填する際に、容器内の泡立ち発生を抑制することができる。 According to the present invention, the mesh can be provided in the nozzle without increasing the outer diameter of the nozzle, without causing a protrusion in the nozzle, or without reducing the inner diameter, and the liquid discharged from the nozzle. The column can be made laminar without disturbance. Thereby, when filling a container with a liquid, generation | occurrence | production of foam in a container can be suppressed.

容器内の泡立ち発生を抑制できる効果としては、
(i)容器容積に対して多くの液を充填できるので、容器材料が節減できる
(ii)泡立ちによる液の溢れが防げるので、容器表面の洗浄が不要である
(iii)泡立ちによる液の溢れが防げるので、キャップのシール部に液が付着せず、雑菌発生の危険性が低減できる
(iv)柔軟容器への充填の場合、泡立ちによりシール面が液で濡れて、シール強度が低下することを防止できる
を挙げることができる。 As an effect of suppressing the occurrence of foaming in the container,
(i) Since many liquids can be filled to the container volume, the container material can be saved.
(ii) Since the overflow of liquid due to foaming can be prevented, cleaning of the container surface is unnecessary.
(iii) Since the overflow of liquid due to foaming can be prevented, the liquid does not adhere to the seal part of the cap, and the risk of generation of germs can be reduced.
(iv) In the case of filling into a flexible container, it can be mentioned that the sealing surface can be prevented from lowering due to foaming and the sealing surface becoming wet.

尚、本発明のノズルにより液体が充填される容器は、特に限定されるものではなく、一例として、樹脂容器、ガラス容器、金属容器、樹脂や金属によるフィルム状の柔軟な容器等が挙げられる。 In addition, the container filled with the liquid by the nozzle of the present invention is not particularly limited, and examples thereof include a resin container, a glass container, a metal container, a film-like flexible container made of resin or metal, and the like.

また、本発明のノズルが用いられる液体は、特に限定されるものではなく、一例として、衣料用洗剤、柔軟剤、シャンプーやリンス、家庭用洗剤、飲料、液体食品、食用油、燃料等が挙げられる。 In addition, the liquid in which the nozzle of the present invention is used is not particularly limited, and examples thereof include clothing detergents, softeners, shampoos and rinses, household detergents, beverages, liquid foods, edible oils, fuels, and the like. It is done.

２０ノズル
２１本体筒部
２２付加筒部
２２Ａ先端筒部
２３メッシュ
３１溶接部
３２空隙
４１ろう付部
４２空隙 20 Nozzle 21 Body cylinder part 22 Additional cylinder part 22A Tip cylinder part 23 Mesh 31 Welding part 32 Gap 41 Brazing part 42 Gap

Claims

A liquid filling nozzle formed by joining a plurality of tubular portions, the outer edge of the mesh between the end face of the additional tubular portion and the main body tube portion that are phase bonding is rare clamping, the end face of the additional tubular portion and an additional tubular portion other outer edge of the mesh is rare clamping, liquid filling nozzle of the multi-stage mesh structure their cylindrical portion is phase bonding with the outer edge of the mesh on the side of the outer peripheral surface therebetween.

There is no protrusion on the outer peripheral surface between the end surface of the cylindrical portion and the cylindrical portion that has the phase bonding, liquid filling nozzle according to claim 1, wherein.

The side of the inner peripheral surface of the cylindrical portion that has the phase bonding a liquid filling nozzle according to claim 1 or 2 is gap between the end surface of the cylindrical portion and the cylindrical portion sandwiching the outer edge of the mesh.

The liquid filling nozzle according to any one of claims 1 to 3 , wherein a portion where the cylindrical portion and the cylindrical portion are joined is a welded portion .

Liquid filling nozzle according to claim 1 which is brazed portion via a joint gallery of the cylindrical portion and the cylindrical portion.