JP4249715B2 - Can airtightness test equipment - Google Patents
Can airtightness test equipment Download PDFInfo
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- JP4249715B2 JP4249715B2 JP2005061072A JP2005061072A JP4249715B2 JP 4249715 B2 JP4249715 B2 JP 4249715B2 JP 2005061072 A JP2005061072 A JP 2005061072A JP 2005061072 A JP2005061072 A JP 2005061072A JP 4249715 B2 JP4249715 B2 JP 4249715B2
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Description
本発明は、缶を装入する真空チャンバと、その内部に缶の地板の膨張を押さえる天板押さえ及び地板押さえを有する缶の気密性試験装置に関する。 The present invention relates to a vacuum chamber for charging a can, a top plate presser for suppressing expansion of the base plate of the can, and a hermeticity testing apparatus for the can having a base plate presser.
化学薬品や食料品等に使用されるドラム缶は、高い信頼性が要求され、とりわけ内容物の漏洩が無いことを強く要望されている。その結果、全製品について気密性試験を行うことが規格により規定されている。 Drums used for chemicals and foodstuffs are required to have high reliability, and in particular, there is a strong demand for no leakage of contents. As a result, the standard stipulates that all products be airtight.
缶の気密性試験においては、テスト缶内部に試験ガスを封入し、テスト缶を真空チャンバに装入して、真空チャンバ内への前記試験ガスの漏洩を検出する。試験後の缶は真空チャンバの外に排出し、次のテスト缶を真空チャンバに装入する。 In the airtightness test of the can, a test gas is sealed inside the test can, and the test can is inserted into a vacuum chamber to detect leakage of the test gas into the vacuum chamber. The test can is discharged out of the vacuum chamber, and the next test can is loaded into the vacuum chamber.
真空引きの際は、缶の内部は大気圧であるため缶は膨張しようとする。缶の胴部は、周方向（フープ方向）と高さ方向に引張応力が作用するが、缶の素材である鋼板の特性として、引張応力に対しては十分な強度を有するため変形は起こらない。しかし、天板と地板は、静水圧プレスと同様の応力が加わるため、比較的容易に変形する。 When evacuating, the can tends to expand because the inside of the can is at atmospheric pressure. The body of the can is subjected to tensile stress in the circumferential direction (hoop direction) and the height direction, but as a characteristic of the steel plate that is the material of the can, it has sufficient strength against tensile stress, so deformation does not occur. . However, the top plate and the base plate are deformed relatively easily because the same stress as that applied by the hydrostatic press is applied.
そこで、缶の気密性試験においては、缶の天板と地板が膨張するのを防ぐため、天地板を治具（天地板押さえ）で押さえて試験を行う。その場合、治具（天地板押さえ）の押さえ方が不適切であると、治具により缶に疵をつけたり、あるいは変形させたりすることになる。従って、適切な押さえ力又は押さえ位置（ストローク）に調整して、缶の形状を保持する必要があり、対策が検討されている。 Therefore, in the airtightness test of the can, in order to prevent the can top plate and the base plate from expanding, the test is performed by pressing the top plate with a jig (top plate pressing). In that case, if the method of pressing the jig (top plate pressing) is inappropriate, the jig will be crushed or deformed by the jig. Therefore, it is necessary to adjust to an appropriate pressing force or pressing position (stroke) to maintain the shape of the can, and countermeasures are being studied.
例えば、特許文献１には、薄肉の材質からなる被検体（缶）の内側と外側とで圧力差が生じても、変形が生じることがなく、全ての箇所での漏洩検査を可能にする試験方法が提案されている。この技術は、トレーサガスが充填された被検体（缶）の外形寸法を測定するとともに、設定寸法との偏差を演算する測定工程と、被検体（缶）を押圧する押圧部材を、予め設定された所定位置から、前記偏差に基づいて移動させる移動工程とを有するというものである。
しかし、従来技術の天地板押さえについては、板面を押さえる際、天板押さえ又は地板押さえの停止位置を調整する必要がある。停止位置の調整結果として、天地板押さえの繰出し量（ストローク）が不足の場合は、天地板が膨張する変形が発生し、ストローク過大の場合は、天地板に疵や凹みが発生するという問題がある。 However, with respect to the top plate holder of the prior art, when pressing the plate surface, it is necessary to adjust the stop position of the top plate holder or the base plate holder. As a result of the adjustment of the stop position, if the top plate push-out amount (stroke) is insufficient, the top plate will be deformed to expand, and if the stroke is excessive, the top plate will have wrinkles or dents. is there.
天板押さえ又は地板押さえの押さえ力を調整する場合は、大気圧と天地板の面積から計算すると、押さえ力として必要な力は数トンとなる。押さえ力を調節する機構としては、バネやテコ等の機械的手段が考えられるが、数トンの押さえ力を扱うには、かなり大掛かりな装置となる。押さえ力の調整結果として、押さえ力不足の場合は天地板が膨張する変形が発生し、押さえ力過大の場合は天地板に疵や凹み発生するという問題がある。 When adjusting the pressing force of the top plate holder or the bottom plate holder, the force required as the pressing force is several tons when calculated from the atmospheric pressure and the area of the top plate. As a mechanism for adjusting the pressing force, mechanical means such as a spring or a lever can be considered, but it is a considerably large device to handle a pressing force of several tons. As a result of adjusting the pressing force, there is a problem that when the pressing force is insufficient, the top plate is deformed to expand, and when the pressing force is excessive, a wrinkle or a dent is generated on the top plate.
本発明は、以上の問題を解決し、天地板の停止位置の調整が不要で押さえ力発生の調整が簡易な缶の気密性試験装置を提供することを目的とする。
An object of the present invention is to solve the above problems, and to provide an airtightness testing apparatus for cans that does not require adjustment of the stop position of the top and bottom plate and can easily adjust the generation of pressing force.
上記の課題は次の発明により解決される。その発明は、缶を装入する真空チャンバとその内部に缶の天板及び地板の膨張を押さえる天板押さえ及び地板押さえとを有する缶の気密性試験装置において、
真空チャンバの床および／または天井に開口部を有し、前記天板押さえおよび地板押さえの外部大気と接している部分の面積はそれぞれ缶の天板および地板の面積と同程度であり、前記地板押さえおよび／または天板押さえが前記開口部に摺動可能に挿入され、前記地板押さえおよび／または天板押さえと前記開口部との隙間は真空チャンバの気密性を保つためにシールされており、前記開口部に摺動可能に挿入された地板押さえおよび／または天板押さえは、真空チャンバの内部を減圧させると、外部の大気圧により真空チャンバ中に押し込まれることを特徴とする缶の気密性試験装置である。
The above problems are solved by the following invention. The invention is a can hermeticity testing apparatus having a vacuum chamber for charging a can and a top plate holder and a bottom plate holder for suppressing expansion of the top plate and the bottom plate of the can.
There are openings in the floor and / or ceiling of the vacuum chamber, and the areas of the top plate holder and the bottom plate holder that are in contact with the external atmosphere are approximately the same as the areas of the top plate and the bottom plate of the can respectively. A presser and / or a top plate presser are slidably inserted into the opening, and a gap between the base plate press and / or the top plate presser and the opening is sealed to maintain the airtightness of the vacuum chamber , The bottom plate holder and / or the top plate holder slidably inserted into the opening is pressed into the vacuum chamber by the external atmospheric pressure when the inside of the vacuum chamber is depressurized . Test equipment.
この発明では、真空チャンバの床又は天井に設けた開口部に、地板押さえ又は天板押さえ（以下、板押さえ）が挿入されている。開口部と板押さえとは摺動可能にシールされているので、真空チャンバの内部を減圧させると、外部の大気圧により板押さえが真空チャンバの中に押し込まれる。 In the present invention, a base plate press or a top plate press (hereinafter referred to as a plate press) is inserted into an opening provided in the floor or ceiling of the vacuum chamber. Since the opening and the plate holder are slidably sealed, when the inside of the vacuum chamber is decompressed, the plate holder is pushed into the vacuum chamber by the external atmospheric pressure.
その結果、真空チャンバ内の缶の地板又は天板は、地板押さえ又は天板押さえにより押される。その力（押さえ力）は、ほぼ大気圧と同等の圧力となる。特に、開口部の面積を缶の地板又は天板の面積に近くしておくことにより、缶の地板又は天板の大部分の領域に大気圧と同等の圧力を加えることができる。 As a result, the base plate or top plate of the can in the vacuum chamber is pressed by the base plate press or the top plate press. The force (pressing force) is almost equal to atmospheric pressure. In particular, by setting the area of the opening close to the area of the base plate or top plate of the can, a pressure equivalent to the atmospheric pressure can be applied to a large area of the base plate or top plate of the can.
缶の天地板のもう一方の板（天板又は地板）についても、缶が反対側の板押さえにより押し上げ又は押し下げられるので、対応する板押さえ（天板押さえ又は地板押さえ）に押しつけられる。その力（押さえ力）も反対側の押さえ力と等しくなるので、缶の天地板のもう一方の板に対する押さえ力も大気圧相当となる。 As for the other plate (top plate or ground plate) of the can top plate, the can is pushed up or down by the plate retainer on the opposite side, so that it is pressed against the corresponding plate retainer (top plate retainer or ground plate retainer). Since the force (pressing force) is also equal to the pressing force on the opposite side, the pressing force of the can on the other plate of the top plate is equivalent to atmospheric pressure.
缶の内部の試験ガスは大気圧で封入されているので、地板押さえ及び天板押さえには内外からほぼ大気圧と同等の圧力が加わることになる。これは缶の天地板にとって、真空引きする前の缶の状態、即ち大気中に置かれた缶の状態に等しい。このように、天地板にかかる缶内外の力を均衡させることにより、缶の天地板の変形を原理的に防止することができる。 Since the test gas inside the can is sealed at atmospheric pressure, a pressure almost equal to atmospheric pressure is applied to the main plate holder and the top plate holder from the inside and outside. This is equivalent to the state of the can before evacuation, that is, the state of the can placed in the atmosphere, for the top plate of the can. In this way, the balance between the inside and outside of the can applied to the top plate can be balanced to prevent the top plate of the can from being deformed in principle.
この発明では、地板押さえ又は天板押さえの押さえ力に大気圧を利用しているので、天地板に対する押さえ力は大気圧と同程度となる。従って、地板押さえ又は天板押さえの設定位置の調節や荷重の制御を行うことなく、天地板の変形を防止することが可能である。また、天地板押さえの設定位置や押さえ力の過不足に伴う疵や変形を解消することもできる。 In the present invention, since the atmospheric pressure is used for the pressing force of the base plate holder or the top plate holder, the pressing force on the top plate is about the same as the atmospheric pressure. Therefore, it is possible to prevent the top plate from being deformed without adjusting the setting position of the base plate press or the top plate press or controlling the load. In addition, it is possible to eliminate wrinkles and deformations due to the setting position of the top and bottom plate press and excessive or insufficient press force.
地板押さえ又は天板押さえの取付けについては、いずれか一方を真空チャンバの床又は天井に設けた開口部に挿入し、他方を天井又は床に固定すればよい。開口部と板押さえとの隙間は、Ｏリング 等で真空シールを施す。開口部と板押さえの摺動部分は、その内径を缶の天地板の寸法と同程度とすることが望ましい。すなわち、この部分の面積に相当する大気圧が、天地板押さえの押さえ力となるので、缶内の試験ガスによる圧力（大気圧）と均衡させるためには、天地板の面積に近づけておく。 For attaching the base plate holder or the top plate holder, one of them may be inserted into an opening provided on the floor or ceiling of the vacuum chamber, and the other may be fixed to the ceiling or floor. The gap between the opening and the plate holder is vacuum sealed with an O-ring or the like. It is desirable that the sliding portion of the opening and the plate retainer has an inner diameter that is approximately the same as the size of the top plate of the can. That is, since the atmospheric pressure corresponding to the area of this portion serves as a pressing force for the top plate holding, it is set close to the top plate area in order to balance with the pressure (atmospheric pressure) by the test gas in the can.
図１に発明の1例として、装置の断面図を示す。この図は、真空チャンバ４０の内部に缶９（図中、破線で示す）が挿入され、床３０が閉じた状態を示している。図に示すように、真空チャンバの床３０に設けた開口部に、地板押さえ３１が挿入されている。床３０の開口部と地板押さえ３１の隙間は摺動可能にシールされており、地板押さえ３１は上下移動が可能である。 FIG. 1 shows a sectional view of an apparatus as an example of the invention. This figure shows a state in which the can 9 (shown by a broken line in the figure) is inserted into the vacuum chamber 40 and the floor 30 is closed. As shown in the figure, a base plate presser 31 is inserted into an opening provided in the floor 30 of the vacuum chamber. The gap between the opening of the floor 30 and the base plate holder 31 is slidably sealed, and the base plate holder 31 can move up and down.
真空チャンバ４０の天井には、天板押さえ４１を設置しておく。天板押さえ４１は、缶９の巻締め部が天板から立上っている寸法より大きくして、天井から突出させておく。これにより、天板押さえ４１が缶９の天板と接触した状態で、缶の巻締め部と天井は接触せず、この隙間を通して缶の天板からの漏洩を検出する。 A top plate holder 41 is installed on the ceiling of the vacuum chamber 40. The top plate retainer 41 is made larger than the dimension in which the winding portion of the can 9 rises from the top plate and protrudes from the ceiling. Thereby, in the state which the top-plate holder | retainer 41 contacted the top plate of the can 9, the winding part of a can and a ceiling do not contact, but the leak from the top plate of a can is detected through this clearance gap.
図２に真空チャンバの床の部分の詳細を示す。真空チャンバ４０の側面下端のフランジにはガスケット４８が埋め込まれており、ここに真空チャンバの床３０（床面の周辺部）を密着させることにより、真空チャンバ４０がシールされる。また、床３０の開口部と地板押さえ３１との摺動部分は、Ｏリング３６によりシールされている。これらのシール３６，４８により、真空チャンバ４０内は外部とシールされることになる。また、缶９の地板と地板押さえ３１の間に、図に示すようにＨｅ透過シート３３を敷設する。 FIG. 2 shows details of the floor portion of the vacuum chamber. A gasket 48 is embedded in the flange at the lower end of the side surface of the vacuum chamber 40, and the vacuum chamber 40 is sealed by bringing the vacuum chamber floor 30 (periphery of the floor surface) into close contact therewith. Further, the sliding portion between the opening of the floor 30 and the main plate holder 31 is sealed by an O-ring 36. By these seals 36 and 48, the inside of the vacuum chamber 40 is sealed from the outside. Further, a He permeable sheet 33 is laid between the bottom plate of the can 9 and the bottom plate holder 31 as shown in the figure.
次に、この装置の使用の際の各構成部分の動作について説明する。まず、真空チャンバの床を降ろして、床の上に缶を載せる。この時、地板押さえは、缶の装入と排出の際に缶の水平移動を妨げないよう、床面から突出しない位置に待避させておく。これにより、缶を持上げずに水平移動させるだけで、缶を真空チャンバの床に載せたり排出したりすることが可能となる。 Next, the operation of each component when using this apparatus will be described. First, the floor of the vacuum chamber is lowered and a can is placed on the floor. At this time, the base plate presser is retracted to a position where it does not protrude from the floor so as not to hinder horizontal movement of the can during charging and discharging of the can. Thus, the can can be placed on or discharged from the floor of the vacuum chamber by simply moving the can horizontally without lifting it.
次いで、真空チャンバの床を上昇させ、チャンバ内に缶を装入する。真空チャンバの床が側壁の下端部に密着して、真空チャンバが閉鎖された後、真空ポンプでチャンバ内を減圧（真空引き）する。真空引きにより、地板押さえはチャンバ内に引き込まれて上昇し、缶の地板に接触する。地板押さえが缶の地板を押し上げると、缶の天板も上昇し天板押さえに接触する。 The vacuum chamber floor is then raised and a can is loaded into the chamber. After the floor of the vacuum chamber is in close contact with the lower end of the side wall and the vacuum chamber is closed, the inside of the chamber is depressurized (evacuated) with a vacuum pump. Due to the evacuation, the base plate retainer is drawn into the chamber and rises to contact the base plate of the can. When the base plate presses up the base plate of the can, the top plate of the can also rises and comes into contact with the top plate press.
最終的に、缶の地板が地板押さえから受ける力と、缶の天板が天板押さえから受ける力に缶の自重を合わせた力が釣合った時点で、地板押さえの上昇が止まる。このように地板押さえが缶の地板を押し上げることにより、缶の下端部（巻締め部）は床面より離れる。 Eventually, when the force that the base plate of the can receives from the base plate press and the force that the can top plate receives from the top plate press balances the weight of the can, the rise of the base plate stops. In this way, the bottom plate presser pushes up the bottom plate of the can, whereby the lower end portion (winding portion) of the can is separated from the floor surface.
その結果、缶の巻締め部と床は接触せず、地板からの試験ガスの漏洩も検出可能となる。
As a result, the winding part of the can and the floor do not come into contact with each other, and the leakage of the test gas from the main plate can be detected.
ここで、大気圧（1kgf/cm2）が缶の地板又は天板（約数1000cm2）に及ぼす力は数トンに及ぶので、缶の自重（数10kg）や地板押さえの自重（数１０kg）は大気圧に比べて無視できる。従って、缶の地板及び天板には、ほぼ大気圧に相当する力が加わることになる。缶内に封入された試験ガスは大気圧であるから、缶の地板及び天板は、内部と外部からほぼ等しい力が加わることになり、真空引きの過程でも変形は原理的に起らない。 Here, the force exerted by atmospheric pressure (1kgf / cm 2 ) on the base plate or top plate (about several thousand cm 2 ) of the can reaches several tons. Is negligible compared to atmospheric pressure. Therefore, a force corresponding to almost atmospheric pressure is applied to the base plate and top plate of the can. Since the test gas sealed in the can is at atmospheric pressure, almost equal force is applied to the base plate and the top plate of the can from the inside and the outside, and deformation does not occur in principle even during the vacuuming process.
なお、チャンバ内を真空引きしていない時に、地板押さえ３１の操作（床からの出没操作）は、エアシリンダ等を用いることができる。例えば図２．１に示すように、地板押さえ３１に、エアシリンダ５１のロッド５２を取付けて、操作する。 In addition, when the inside of the chamber is not evacuated, the operation of the main plate holder 31 (the operation of moving in and out from the floor) can use an air cylinder or the like. For example, as shown in FIG. 2.1, the rod 52 of the air cylinder 51 is attached to the main plate holder 31 and operated.
なお、地板押さえ３１の摺動部には、缶の装入排出により持ち込まれる塵埃が入りやすい。塵埃が溜まると、地板押さえの摺動の際、Ｏリング３６を損傷するので、何らかの防塵処置を施すことが望ましい。そこで図２．２に示す例では、摺動部の上部にブッシング３７を設け、塵埃の侵入をある程度防止している。なお、ブッシング３７は、ある程度の強度を持たせるため金属製とするが、地板押さえよりは軟質の材料として地板押さえの側面を摩耗させないようにしている。 In addition, the dust brought in by charging / discharging of the can easily enters the sliding portion of the main plate holder 31. If dust accumulates, the O-ring 36 is damaged when the main plate presser slides, so it is desirable to take some dust-proofing measures. Therefore, in the example shown in FIG. 2.2, a bushing 37 is provided on the upper portion of the sliding portion to prevent dust from entering to some extent. The bushing 37 is made of metal in order to give a certain degree of strength, but the side surface of the ground plate retainer is not worn as a softer material than the ground plate retainer.
以上の例とは別の形態の装置として、図３に示すように、真空チャンバ４０の天井に開口部を設け、天板押さえ４１を摺動可能にシールして挿入してもよい。天板押さえ４１は、缶９の装入前は真空チャンバ４０の天井から十分に低い位置（最終的に缶の天板と接触可能な位置）に突出させておく。また、天板押さえ４１は、缶の装入前の状態では、落下しないようストッパ等で支持しておく。
As an apparatus different from the above example, as shown in FIG. 3, an opening may be provided in the ceiling of the vacuum chamber 40, and the top plate holder 41 may be slidably sealed and inserted. The top plate holder 41 protrudes from the ceiling of the vacuum chamber 40 to a sufficiently low position (position where it can finally come into contact with the top plate of the can) before the can 9 is inserted. Further, the top plate holder 41 is supported by a stopper or the like so as not to drop before the can is inserted.
缶の装入の際は、真空チャンバの床３０に固定した地板押さえ３１に、缶９の地板を載せて、床を上昇させる。すると、缶９の天板に天板押さえ４１が接触し、缶の天板が天板押さえ４１から受ける力（及び缶の自重）と、缶の地板が地板押さえ３１から受ける力が釣合った状態となる。この状態で、天板押さえ４１は開口部を摺動しながら持上げられる。 When charging the can, the base plate of the can 9 is placed on the base plate holder 31 fixed to the floor 30 of the vacuum chamber, and the floor is raised. Then, the top plate holder 41 contacts the top plate of the can 9, and the force that the top plate of the can receives from the top plate holder 41 (and the weight of the can) balances the force that the base plate of the can receives from the base plate holder 31. It becomes a state. In this state, the top plate holder 41 is lifted while sliding on the opening.
真空チャンバの床３０がチャンバ側面の下端部に密着した後、真空ポンプでチャンバ内を減圧（真空引き）する。真空引きの過程では、缶９の天板には天板押さえ４１により大気圧相当の力が加わるので、缶内の圧力とほぼ等しくなり変形は原理的に起らない。また、缶９の地板も同じ力で地板押さえ３１に押しつけられるので、地板に加わる内外の力もほぼ等しくなり、地板についても変形は起らない。 After the floor 30 of the vacuum chamber is in close contact with the lower end of the side surface of the chamber, the inside of the chamber is depressurized (evacuated) with a vacuum pump. In the evacuation process, a force corresponding to atmospheric pressure is applied to the top plate of the can 9 by the top plate presser 41, so that the pressure is almost equal to the pressure in the can and no deformation occurs in principle. Further, since the base plate of the can 9 is also pressed against the base plate holder 31 with the same force, the internal and external forces applied to the base plate are substantially equal, and the base plate is not deformed.
この例では、天板押さえ４１の摺動部分が真空チャンバ４０の天井にあるので、摺動部分への塵埃の付着が起こりにくいという効果がある。しかしその一方、地板押さえ３１が真空チャンバの床３０から突出した状態で固定されているため、缶を水平方向に移動しようとすると缶の最下端の巻締め部が衝突する。そのため、缶の装入及び排出の際は、缶を持上げて操作する必要がある。 In this example, since the sliding portion of the top plate presser 41 is on the ceiling of the vacuum chamber 40, there is an effect that dust does not easily adhere to the sliding portion. However, on the other hand, since the main plate holder 31 is fixed in a state of protruding from the floor 30 of the vacuum chamber, when the can is moved in the horizontal direction, the lowermost tightening portion of the can collides. Therefore, it is necessary to lift and operate the can when charging and discharging the can.
その他の例として、図４に示すように、天板押さえ４１と地板押さえ３１を双方とも摺動可能とすることもできる。この場合は、缶９の装入及び排出の際、地板押さえ３１を真空チャンバの床３０の面から突出しない位置に待避させておくことができる。その結果、缶９を持上げずに真空チャンバの床３０に載せたり排出したりすることができる。
As another example, as shown in FIG. 4, both the top plate holder 41 and the main plate holder 31 can be slidable. In this case, the base plate holder 31 can be retracted to a position where it does not protrude from the surface of the floor 30 of the vacuum chamber when the can 9 is inserted and discharged. As a result, the can 9 can be placed on or discharged from the floor 30 of the vacuum chamber without lifting the can 9.
本発明によれば、真空チャンバの天井に天板押さえを取付けるたので、オープン缶の気密性試験もほとんど切り替え時間を必要とせず行うことができ、オープン缶とクローズド缶の両方を高能率に気密性試験を行うことができる。 According to the present invention, since the top plate holder is attached to the ceiling of the vacuum chamber, the airtightness test of the open can can be performed with almost no switching time, and both the open can and the closed can are airtight with high efficiency. A sex test can be performed.
９ 缶
３０ 真空チャンバの床
３１ 地板押さえ
３３ Ｈｅ透過シート
３６ Ｏリング（地板押さえ用）
３７ ブッシング
４０ 真空チャンバ
４１ 天板押さえ
４４ 真空チャンバの天井
４５ 天井の開口部
４６ Ｏリング（天板押さえ用）
４７，４８ ガスケット
５１ エアシリンダ
５２ エアシリンダのロッド
９１ 缶の天板
９２ 胴部上端のカール部
９３ 天板カール部
９７ ガスケット（オープン缶密閉用）
９９ 締結用バンド
9 Can 30 Floor of vacuum chamber 31 Base plate holder 33 He permeable sheet 36 O-ring (for base plate holder)
37 Bushing 40 Vacuum chamber 41 Top plate holder 44 Vacuum chamber ceiling 45 Ceiling opening 46 O-ring (for top plate holder)
47, 48 Gasket 51 Air Cylinder 52 Air Cylinder Rod 91 Can Top Plate 92 Curl at Upper End of Body 93 Top Plate Curl 97 97 Gasket (for Open Can Sealing)
99 Fastening band
Claims (1)
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005061072A JP4249715B2 (en) | 2005-03-04 | 2005-03-04 | Can airtightness test equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005061072A JP4249715B2 (en) | 2005-03-04 | 2005-03-04 | Can airtightness test equipment |
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| JP4249715B2 true JP4249715B2 (en) | 2009-04-08 |
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