JP4744362B2 - Spray nozzle for aerosol container - Google Patents

Spray nozzle for aerosol container Download PDF

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Publication number
JP4744362B2
JP4744362B2 JP2006147058A JP2006147058A JP4744362B2 JP 4744362 B2 JP4744362 B2 JP 4744362B2 JP 2006147058 A JP2006147058 A JP 2006147058A JP 2006147058 A JP2006147058 A JP 2006147058A JP 4744362 B2 JP4744362 B2 JP 4744362B2
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cylinder
aerosol container
top plate
nozzle
opening
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JP2007314219A (en
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辰男 椿
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
    • B65D83/22—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means with a mechanical means to disable actuation

Description

本発明は、エアゾール容器用噴射ノズルに関するものであり、容器内の残存ガスを全て放出して安全な廃棄を実現しようとするものである。   The present invention relates to an injection nozzle for an aerosol container, and is intended to realize safe disposal by discharging all residual gas in the container.

エアゾール容器は、容器内の内容物を使い切った後においてもその内部には内容物を噴出させる加圧ガスが残存しており、容器の廃棄に際しては、安全性の観点から容器の胴体に孔を開けて残留するガスを全て放出することが前提となっている。   Even after the contents in the container are used up, the pressurized gas that spouts the contents remains inside the container, and when disposing of the container, a hole is formed in the body of the container from the viewpoint of safety. It is assumed that all gas remaining after opening is released.

ところで、かかる孔開け作業は手間がかかることから、残存ガスを放出することなしに廃棄される場合もあって、この点に関してはこれまでに様々な工夫を凝らしたものが提案されている（例えば特許文献1、特許文献2参照）。
特開2002-80077号公報 特開2004-75161号公報 By the way, since such a drilling operation is time-consuming, it may be discarded without releasing the residual gas. In this regard, various devices have been proposed so far (for example, (See Patent Document 1 and Patent Document 2).
JP 2002-80077 A Japanese Patent Laid-Open No. 2004-75161

また、近年では、容器の使い勝手の改善を図るため、押しボタン式のエアゾール容器に替えて、操作レバーを牽曳することによって内容物を噴出させるトリガー式の商品も開発されているところ、残存ガスの放出構造に関しては未だ改善の余地が残されていた。   In recent years, in order to improve the usability of the container, a trigger type product has been developed in which the contents are ejected by checking the operating lever instead of the push button type aerosol container. There was still room for improvement in the release structure.

本発明の課題は、簡単な動作でもって残存ガスの全てを放出できる新規なエアゾール容器用噴射ノズルを提案するところにある。   An object of the present invention is to propose a novel spray nozzle for an aerosol container that can release all of the residual gas with a simple operation.

本発明は、エアゾール容器の首部に着脱自在に装着される肩カバーと、エアゾール容器のステムにつながる噴出筒を有し上下動を可能とするノズル本体と、肩カバーに対して揺動可能であり、かつノズル本体に軸を介して連結され、その牽曳にて該噴出筒をステムとともに下方に押し込んで内容物を噴出させる操作レバーとを備えたエアゾール容器用噴射ノズルであって、
前記ノズル本体に、噴出筒の胴体部分を通過させる貫通孔を有し該ノズル本体の底壁に沿い左右に往復移動可能なスライダーを設け、
前記貫通孔は、噴出筒の押し込みとその復帰を許容する大開口と、この大開口につながり該噴出筒に連係してその押し込み姿勢を維持する小開口の二種からなる、ことを特徴とするエアゾール容器用噴射ノズルである。 The present invention includes a shoulder cover that is detachably attached to a neck portion of an aerosol container, a nozzle body that has an ejection cylinder connected to a stem of the aerosol container and that can move up and down, and is swingable with respect to the shoulder cover. And an injection nozzle for an aerosol container that is connected to the nozzle body via a shaft, and includes an operation lever that pushes the ejection cylinder downward together with the stem by the check to eject the contents,
The nozzle body has a through-hole that allows the body portion of the ejection cylinder to pass therethrough and is provided with a slider that can reciprocate left and right along the bottom wall of the nozzle body,
The through hole is composed of two types: a large opening that allows the injection cylinder to be pushed in and returned, and a small opening that is connected to the large opening and maintains the pushing posture in connection with the injection cylinder. It is a spray nozzle for aerosol containers.

上記の構成になるエアゾール容器用噴射ノズルにおいて、前記スライダーは、大開口及び小開口を有する天板と、この天板の各辺の下端につながり、その下端部を摺動面とする周壁からなるものにて構成することができる。   In the aerosol container injection nozzle configured as described above, the slider includes a top plate having a large opening and a small opening, and a peripheral wall connected to the lower ends of the sides of the top plate and having the lower end portion as a sliding surface. It can consist of things.

また、前記噴出筒は、その胴体に、小径開口の裏面縁部に上端部分を当接させて該噴出筒の押し込み姿勢をそのまま維持するフランジを設けるか、あるいは、小径開口の裏面縁部に上端部分を当接させて該噴出筒の押し込み姿勢をそのまま維持する膨出部又はリブを設けるのが好ましい。   In addition, the jet cylinder is provided with a flange on its body so that the upper end portion is brought into contact with the rear edge of the small-diameter opening to maintain the pushing posture of the jet cylinder as it is, or the upper end is provided on the rear edge of the small-diameter opening. It is preferable to provide a bulging portion or a rib that abuts the portion and maintains the pushing posture of the ejection cylinder as it is.

操作レバーを牽曳した状態（内容物の噴出状態）でスライダーを移動させ、小径開口において噴出筒が通り抜けるように位置せしめると、該噴出筒のフランジの上端部分、あるいは膨出部又はリブの上端部分が小径開口を形成する天板の裏面縁部に当接して該噴出筒の押し込み姿勢がそのまま維持されることとなり、操作レバーに触れなくとも容器内のガスは全て放出される。   When the slider is moved with the operation lever depressed (the contents are ejected) and positioned so that the ejection cylinder passes through the small-diameter opening, the upper end of the flange of the ejection cylinder, or the upper end of the bulge or rib The portion comes into contact with the rear edge of the top plate forming a small-diameter opening, and the pushing posture of the ejection cylinder is maintained as it is, and all the gas in the container is released without touching the operation lever.

以下、図面を用いて本発明をより具体的に説明する。
図1(a)（b）は本発明に従うエアゾール容器用噴射ノズルの実施の形態を示した図である。
図における1はエアゾール容器である。このエアゾール容器1はステム1aを押圧することによりその先端部より内容物を噴出させる。また、2はエアゾール容器1の首部に着脱自在に装着される肩カバーである。 Hereinafter, the present invention will be described more specifically with reference to the drawings.
1 (a) and 1 (b) are diagrams showing an embodiment of an aerosol container spray nozzle according to the present invention.
In the figure, 1 is an aerosol container. The aerosol container 1 presses the stem 1a to eject the contents from its tip. Reference numeral 2 denotes a shoulder cover that is detachably attached to the neck of the aerosol container 1.

肩カバー2は、ステムを挿通する開口部gを有する隔壁2aを有し、該隔壁2aより下方に延びる外壁2bがエアゾール容器1の肩部を覆うように形成されている。この肩カバー2の先端内面にはエアゾール容器1の首部に係合する係合爪を供えた筒部2cが内壁から垂下されており、隔壁2aの上方の立ち上り壁の後部上面には後述する枢軸Sを受け入れる軸受け部2dが設けられている。   The shoulder cover 2 has a partition wall 2a having an opening g through which the stem is inserted, and an outer wall 2b extending downward from the partition wall 2a is formed so as to cover the shoulder portion of the aerosol container 1. A cylindrical portion 2c provided with an engaging claw that engages with the neck portion of the aerosol container 1 is suspended from the inner wall on the inner surface of the front end of the shoulder cover 2, and a pivot that will be described later is disposed on the rear upper surface of the rising wall above the partition wall 2a. A bearing portion 2d for receiving S is provided.

ここに、上記筒部2cは、組立て時の容易性及び廃棄時の肩カバー2の分別容易性を考慮して縦方向に伸びるスリット等を形成し、弾性変形容易な構成とすることが可能であり、同様に係合爪を間欠とし係合力を調整することもできる。また、図示の例では、筒部2cをエアゾール容器1の首部の外側から装着する場合について示したが、該係合爪を筒部2cの外面に設け、エアゾール容器1の首部の内側から装着してもよい。   Here, the cylindrical portion 2c is formed with a slit or the like extending in the vertical direction in consideration of the ease of assembly and the ease of separation of the shoulder cover 2 at the time of disposal, and can be configured to be easily elastically deformed. Similarly, the engagement force can be adjusted by intermittently engaging the claws. Further, in the illustrated example, the case where the cylindrical portion 2c is mounted from the outside of the neck portion of the aerosol container 1 is shown, but the engaging claw is provided on the outer surface of the cylindrical portion 2c, and is mounted from the inside of the neck portion of the aerosol container 1. May be.

また、3は上部カバーkによって覆われたノズル本体である。このノズル本体3はL字状をなしエアゾール容器1のステム1aにつながる噴出筒3aを有しており、ステム1aから噴出された内容物は噴出筒3aを通り抜け、その先端に配置されたチップ3bを経て外界へと排出される。   Reference numeral 3 denotes a nozzle body covered with an upper cover k. This nozzle body 3 is L-shaped and has a jet cylinder 3a connected to the stem 1a of the aerosol container 1, and the contents jetted from the stem 1a pass through the jet cylinder 3a and are arranged at the tip 3b at the tip thereof. After that, it is discharged to the outside world.

また、4は肩カバー2及び上部カバーkの内側に配置された操作レバーである。この操作レバー4は軸受け部2dに設けられた枢軸Sを介して肩カバー2に対して揺動可能に支持されている。   Reference numeral 4 denotes an operation lever disposed inside the shoulder cover 2 and the upper cover k. The operation lever 4 is supported so as to be swingable with respect to the shoulder cover 2 via a pivot S provided in the bearing portion 2d.

5はノズル本体3の噴出筒3a外面に形成された軸部である。この軸部5は操作レバー4と噴射筒3aとを相互につなぐものであり、操作レバー4を牽曳することにより軸部5を介して噴出筒3aが押し下げられ、これによりステム1aが下方へ押し込まれる。   Reference numeral 5 denotes a shaft portion formed on the outer surface of the ejection cylinder 3a of the nozzle body 3. This shaft portion 5 connects the operation lever 4 and the injection cylinder 3a to each other. By depressing the operation lever 4, the ejection cylinder 3a is pushed down via the shaft portion 5, and thereby the stem 1a is moved downward. Pushed in.

6は噴出筒3aの胴体外面に一体的に設けられたフランジ、7は隔壁2aに配置されその隔壁2aのガイド2a′に沿って左右に往復移動可能なスライダーである。   Reference numeral 6 denotes a flange integrally provided on the outer surface of the body of the ejection cylinder 3a. Reference numeral 7 denotes a slider which is disposed on the partition wall 2a and can be reciprocated left and right along the guide 2a 'of the partition wall 2a.

スライダー7はその外観斜視図を図2に示すように、天板7aと、この天板7aの各辺の下端につながり、その下端部を摺動面とする周壁7b、7c、7d、7eからなっており、天板7aには、噴出筒3aの胴体部分を通過させる貫通孔hが設けられている。この貫通孔hは大開口h１と、この大開口h１につながる小径開口h２からなる。なお、下端部を摺動面とする周壁7b〜7eのうち、7c、7eには下端部より内方へ向けて延出しガイド2a′に係合してスライダー7の上方への抜けを防止する係合板7c′、7e′が形成されている。 As shown in FIG. 2, the external perspective view of the slider 7 is connected to the top plate 7a and the peripheral walls 7b, 7c, 7d, and 7e connected to the lower ends of the sides of the top plate 7a and having the lower end portions as sliding surfaces. The top plate 7a is provided with a through hole h through which the body portion of the ejection cylinder 3a passes. The through-holes h is a large opening h 1, consisting of a small diameter opening h 2 lead to the large opening h 1. Of the peripheral walls 7b to 7e whose lower end portion is a sliding surface, 7c and 7e are extended inward from the lower end portion and engaged with the guide 2a 'to prevent the slider 7 from being pulled upward. Engagement plates 7c 'and 7e' are formed.

スライダー７は肩カバー2の側壁に設けられた窓孔2e、2fの何れか一方から常に露出しており、その突出部分を押し込むことで隔壁2aのガイド2a′に沿って移動せることができるようになっている。   The slider 7 is always exposed from one of the window holes 2e and 2f provided on the side wall of the shoulder cover 2, and can be moved along the guide 2a 'of the partition wall 2a by pushing the protruding portion. It has become.

図1(a)に示す如く、噴出筒3aが貫通孔hの大開口h１を通り抜けるようにスライダー7を移動せしめて、操作レバー4を牽曵することで噴出筒3aが操作レバー4の揺動にてステム1aとともに押し込まれることとなり、これにより容器1内の内容物の噴出が可能となる。 As shown in FIG. 1 (a), the ejection tube 3a is moved the slider 7 to pass through the large opening h 1 of the through-hole h, rocking ejection tube 3a is operating lever 4 by牽曵the operating lever 4 It is pushed together with the stem 1a by the movement, so that the contents in the container 1 can be ejected.

操作レバー4を牽曳したまま、スライダー7を反対側の窓孔2fから押し込み、図3(a)、（b）に示すように噴出筒3aが貫通孔hの小開口h２を通り抜けるように位置せしめると、噴出筒3aのフランジ6はスライダー7の天板7aの下側（裏面）に位置し、この状態で操作レバー4の牽曳を停止しても該フランジ6の上端部分が小開口h２を形成する天板7の裏面縁部に当接して該噴出筒3aは押し込まれた姿勢を維持することとなり、これにより容器1内の残存ガスを全て放出することが可能となる。なお、操作レバー4を牽曳することのない図4(a)、（b）に示す状態においては、フランジ6はスライダー7の天板7aの直上に位置し噴出筒3aの下方への移動が規制されるため操作レバー4はロックされる。 While the operating lever 4 and牽曳, pushing the slider 7 from the opposite side of the window hole 2f, FIG. 3 (a), to pass through the small opening h 2 of the ejection tube 3a through holes h as shown in (b) When positioned, the flange 6 of the ejection cylinder 3a is positioned below the top plate 7a of the slider 7 (the back surface). Even if the check of the operating lever 4 is stopped in this state, the upper end of the flange 6 is a small opening. abuts該噴out tube 3a on the back edge of the top plate 7 forming a h 2 becomes to maintain the pushed-in position and thereby enabling to release all the remaining gas in the container 1. In the state shown in FIGS. 4 (a) and 4 (b) in which the operation lever 4 is not checked, the flange 6 is located immediately above the top plate 7a of the slider 7 and the downward movement of the ejection cylinder 3a is not performed. The operation lever 4 is locked because it is restricted.

図5(a)（b）は本発明に従う噴射ノズルの他の実施の形態を示したものであり、図中8は噴出筒3aの下端周壁にその周りに沿い90°間隔で一体的に設けられたリブ（縦リブ）である。   FIGS. 5 (a) and 5 (b) show another embodiment of the injection nozzle according to the present invention. In FIG. 5, reference numeral 8 is integrally provided on the peripheral wall of the lower end of the injection cylinder 3a at intervals of 90 °. Ribs (vertical ribs).

この例の噴射ノズルも、噴出筒3aが貫通孔hの大開口h１を通り抜けるようにスライダー7を位置せしめ、操作レバー4を牽曵することで噴出筒3aが操作レバー4の揺動にてステム1aとともに押し込まれることとなり、これにより容器1内の内容物の噴出が可能となるが、操作レバー4を牽曳したまま、スライダー7を反対側の窓孔から押し込み、噴出筒3aが貫通孔hの小開口h２を通り抜けるように位置せしめることで、噴出筒3aのリブ8はスライダー7の天板7aの下側（裏面）に位置し、この状態で操作レバー4の牽曳を停止してもその姿勢が保たれるため容器1内の残存ガスを全て放出される。 Also the injection nozzle in this example, ejection tube 3a is allowed to position the slider 7 to pass through the large opening h 1 of the through-hole h, in oscillating jet tube 3a is operating lever 4 by牽曵the operating lever 4 The contents inside the container 1 can be ejected together with the stem 1a, but the slider 7 is pushed in from the window hole on the opposite side while the operation lever 4 is pressed, and the ejection cylinder 3a is inserted into the through-hole. by allowed to position to pass through the small opening h 2 of h, the rib 8 of the ejection tube 3a is positioned below the top plate 7a of the slider 7 (back side), stop牽曳of the operating lever 4 in this state However, since the posture is maintained, all the remaining gas in the container 1 is released.

とくに、噴出筒3aにリブ8を設けた構造のものにおいては、該リブ8の上部で噴出筒3aの径を大きくして段差9を設け、この段差9とスライダー7の天板7aとの間に図6(a)、（b）に示すような着脱可能なストッパー10を配置することができ、これにより噴出筒3aの下方への移動を規制し操作レバー4の誤動作をなくすことができる。なお、前記リブ8の替わりに噴出筒3aの外周に環状に突出する膨出部を設けるようにしてもよい。また、図5、6に示したところのスライダー7は、図1〜4に示した前掲実施の形態と同様に、周壁下端部に内方へ向けて延出する係合板を設け、隔壁2aにはその係合板に係合するガイドを設けてスライダー7の上方への抜けを防止する構造を採用することも可能である。   Particularly, in the structure in which the rib 8 is provided on the ejection cylinder 3a, a step 9 is formed by increasing the diameter of the ejection cylinder 3a at the upper part of the rib 8, and between the step 9 and the top plate 7a of the slider 7. A removable stopper 10 as shown in FIGS. 6 (a) and 6 (b) can be arranged, thereby restricting the downward movement of the ejection cylinder 3a and preventing the operation lever 4 from malfunctioning. Instead of the rib 8, a bulging portion protruding in an annular shape may be provided on the outer periphery of the ejection cylinder 3a. Also, the slider 7 shown in FIGS. 5 and 6 is provided with an engagement plate extending inward at the lower end of the peripheral wall, similar to the above-described embodiment shown in FIGS. It is also possible to adopt a structure in which a guide that engages with the engaging plate is provided to prevent the slider 7 from coming off upward.

噴射ノズル自体は、合成樹脂を用いて射出成形法により所望の形状に形成する。   The injection nozzle itself is formed into a desired shape by injection molding using synthetic resin.

容器内に残存するガスの全てを放出できるエアゾール容器用噴射ノズルが提供できる。   An aerosol container spray nozzle capable of releasing all of the gas remaining in the container can be provided.

(a)（b）は本発明に従う噴射ノズルの実施の形態を示した図である。(a) (b) is the figure which showed embodiment of the injection nozzle according to this invention. 図1に示したスライダーの外観斜視図である。FIG. 2 is an external perspective view of the slider shown in FIG. (a)（b）は図1に示した噴射ノズルの使用形態の説明図である。(a) (b) is explanatory drawing of the usage form of the injection nozzle shown in FIG. (a)（b）は図1に示した噴射ノズルの使用形態の説明図である。(a) (b) is explanatory drawing of the usage form of the injection nozzle shown in FIG. (a)（b）は本発明に従う噴射ノズルの他の実施の形態を示した図である。(a) (b) is the figure which showed other embodiment of the injection nozzle according to this invention. (a)（b）は図5に示した噴射ノズルの使用形態の説明図である。(a) (b) is explanatory drawing of the usage form of the injection nozzle shown in FIG.

符号の説明Explanation of symbols

1 エアゾール容器
1a ステム
2 肩カバー
2a 隔壁
2b 外壁
2c 筒部
2d 軸受け部
3 ノズル本体
3a 噴出筒
3b チップ
4 操作レバー
5 軸部
6 フランジ
7 スライダー
7a 天板
7b 周壁
7c 周壁
7d 周壁
7e 周壁
8 リブ
9 段差
10 ストッパー
S 枢軸
K 上部カバー 1 Aerosol container
1a stem
2 Shoulder cover
2a Bulkhead
2b outer wall
2c Tube
2d bearing
3 Nozzle body
3a Spout tube
3b chip
4 Control lever
5 Shaft
6 Flange
7 Slider
7a Top plate
7b wall
7c wall
7d wall
7e wall
8 ribs
9 steps
10 Stopper
S axis
K top cover

Claims (4)

エアゾール容器の首部に着脱自在に装着される肩カバーと、エアゾール容器のステムにつながる噴出筒を有し上下動を可能とするノズル本体と、肩カバーに対して揺動可能であり、かつノズル本体に軸部を介して連結され、その牽曳にて該噴出筒をステムとともに下方に押し込んで内容物を噴出させる操作レバーとを備えたエアゾール容器用噴射ノズルであって、
前記ノズル本体に、噴出筒の胴体部分を通過させる貫通孔を有し該ノズル本体の底壁に沿い左右に往復移動可能なスライダーを設け、
前記貫通孔は、噴出筒の押し込みとその復帰を許容する大開口と、この大開口につながり該噴出筒に連係してその押し込み姿勢を維持する小開口の二種からなる、ことを特徴とするエアゾール容器用噴射ノズル。 A shoulder cover that is detachably attached to the neck portion of the aerosol container, a nozzle body that has a jet cylinder connected to the stem of the aerosol container and that can move up and down, and that can swing with respect to the shoulder cover, and is a nozzle body An injection nozzle for an aerosol container, comprising an operation lever that is connected via a shaft portion and pushes the ejection cylinder downward together with the stem by the check to eject the contents,
The nozzle body has a through-hole that allows the body portion of the ejection cylinder to pass therethrough and is provided with a slider that can reciprocate left and right along the bottom wall of the nozzle body,
The through hole is composed of two types: a large opening that allows the injection cylinder to be pushed in and returned, and a small opening that is connected to the large opening and maintains the pushing posture in connection with the injection cylinder. Spray nozzle for aerosol containers. 前記スライダーは、大開口及び小開口を有する天板と、この天板の各辺の下端につながり、その下端部を摺動面とする周壁からなる、請求項1記載のエアゾール容器用噴射ノズル。   2. The spray nozzle for an aerosol container according to claim 1, wherein the slider includes a top plate having a large opening and a small opening, and a peripheral wall that is connected to a lower end of each side of the top plate and has a lower end portion as a sliding surface. 前記噴出筒は、その胴体に、小径開口を形成する天板の裏面縁部に上端部分を当接させて該噴出筒の押し込み姿勢をそのまま維持するフランジを有する、請求項1又は2に記載のエアゾール容器用噴射ノズル。   3. The jet cylinder according to claim 1 or 2, wherein the jet cylinder has a flange that maintains the pushing posture of the jet cylinder as it is by bringing the upper end portion into contact with the rear edge of the top plate forming the small-diameter opening. Spray nozzle for aerosol containers. 前記噴出筒は、その胴体に、小径開口を形成する天板の裏面縁部に上端部分を当接させて該噴出筒の押し込み姿勢をそのまま維持する膨出部又はリブを有する、請求項1又は2に記載のエアゾール容器用噴射ノズル。   The jet cylinder has a bulge portion or a rib that maintains the pushing posture of the jet cylinder as it is by bringing the upper end portion into contact with the rear edge of the top plate forming the small-diameter opening on the body. 2. An injection nozzle for an aerosol container according to 2.
JP2006147058A 2006-05-26 2006-05-26 Spray nozzle for aerosol container Expired - Fee Related JP4744362B2 (en)

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JP4883714B2 (en) * 2007-12-13 2012-02-22 東洋エアゾール工業株式会社 Residual content discharge device for aerosol container
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JPH08169480A (en) * 1994-12-16 1996-07-02 Seiichi Kitabayashi Pistol-operated jet head structure
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