JP2011038981A - Leak inspection apparatus - Google Patents

Leak inspection apparatus Download PDF

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JP2011038981A
JP2011038981A JP2009188968A JP2009188968A JP2011038981A JP 2011038981 A JP2011038981 A JP 2011038981A JP 2009188968 A JP2009188968 A JP 2009188968A JP 2009188968 A JP2009188968 A JP 2009188968A JP 2011038981 A JP2011038981 A JP 2011038981A
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pressure
decompression
housing
leak inspection
chamber
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JP5463789B2 (en
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Yukio Morimi
幸雄 森見
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Icom Inc
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Icom Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To enable a leak inspection to be performed which prevents rapid variations in the pressure within a housing being inspected and eliminates the need for complicated procedures. <P>SOLUTION: The leak inspection apparatus includes a working-side decompression piping for connecting the housing being inspected with a pressure measuring means, a decompression means which can reduce the pressure within the housing connected with the working-side decompression piping via a decompression piping, and a chamber which is branch-connected via a branch connection part provided on the decompression piping and in which the pressure can be reduced by the decompression means. Therefore, rapid lowering of the pressure within the decompression piping is prevented even when the pressure is reduced by the decompression means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、無線通信機等の筐体の防水機能等を検査するリーク検査装置に関するものである。   The present invention relates to a leak inspection apparatus that inspects a waterproof function or the like of a housing of a wireless communication device or the like.

無線通信機等の筐体の防水機能を検査する場合には、以下の手順で行うことができる。
（１）筐体内部を減圧するために減圧ポンプを作動させて、目標の圧力まで減圧したら、減圧ポンプを停止させる。
（２）減圧ポンプを停止させた後も、しばらく筐体内部からの気体の流出が続くので筐体内の圧力が目標圧力よりも低くなる。
（３）筐体内に空気を流し込み、加圧することで筐体内部の圧力を目標圧力に到達させる。
（４）目標圧力に到達後、筐体内を閉鎖して一定時間の圧力の変化量を測定する。
（５）一定時間、圧力に変化がなければリークはないものと判断され、圧力が上昇すればリークしていると判断される。
このようなリーク検査方法の一例が特許文献１に開示されている。 When inspecting the waterproof function of a housing such as a wireless communication device, the following procedure can be used.
(1) When the pressure reduction pump is operated to reduce the pressure inside the housing and the pressure is reduced to the target pressure, the pressure reduction pump is stopped.
(2) Since the outflow of gas from the inside of the housing continues for a while after the decompression pump is stopped, the pressure in the housing becomes lower than the target pressure.
(3) Pour air into the casing and pressurize it so that the pressure inside the casing reaches the target pressure.
(4) After reaching the target pressure, the inside of the housing is closed and the amount of change in pressure over a certain period of time is measured.
(5) If there is no change in pressure for a certain time, it is determined that there is no leak, and if the pressure increases, it is determined that there is a leak.
An example of such a leak inspection method is disclosed in Patent Document 1.

従来のリーク検査方法では、
ポンプ停止後、目標圧力に到達させる工程での圧力の変化量が、検査しようとする容器の容量により大きく異なる。例えば、容量の小さい筐体は、前記工程（２）では、ポンプを停止しても、圧力が大きく下がるので、筐体内のパーツに影響を与えるという課題がある。（課題１）
前記工程（３）では、筐体内に空気を流し込み加圧する際、短時間で圧力が急激に上昇し、目標圧力を越えてしまうという課題がある。（課題２） In the conventional leak inspection method,
The amount of change in pressure in the process of reaching the target pressure after the pump is stopped varies greatly depending on the capacity of the container to be inspected. For example, a housing having a small capacity has a problem that in the step (2), even if the pump is stopped, the pressure is greatly reduced, so that the parts in the housing are affected. (Problem 1)
In the step (3), when air is poured into the casing to pressurize, the pressure rapidly increases in a short time and exceeds the target pressure. (Problem 2)

前記課題１を解決するためには、例えば筐体の容量により減圧量を変更するようにポンプを制御することや、目標圧力に到達する前にポンプを停止するということが考えられる。
また、前記課題２を解決するためには、スピコンにより筐体内に流し込む空気量を制御することが考えられる。
上述した何れの方法も、筐体の容量により設定を変更するものであるから、操作が煩雑となる。
In order to solve the problem 1, for example, it is conceivable to control the pump so as to change the pressure reduction amount according to the capacity of the casing, or to stop the pump before reaching the target pressure.
In order to solve the problem 2, it is conceivable to control the amount of air flowing into the housing by a speed controller.
In any of the above-described methods, the setting is changed according to the capacity of the casing, so that the operation becomes complicated.

特開平０４−１９４３１号公報Japanese Patent Laid-Open No. 04-19431

本発明は、煩雑な操作を必要とすることなく、上述したような課題１、２を解決することができるリーク検査装置を提供することを目的としてなされたものである。
The present invention has been made for the purpose of providing a leak inspection apparatus capable of solving the above-described problems 1 and 2 without requiring a complicated operation.

本発明の請求項１に係るリーク検査装置は、
検査対象の筐体と圧力測定手段とが接続されるワーク側減圧配管と、
減圧配管を介して前記ワーク側減圧配管に接続された前記筐体の内部を減圧可能な減圧手段と、
前記減圧配管に設けられた分岐接続部を介して分岐接続されて前記減圧手段により減圧可能なチャンバーと
を備えていることを特徴としている。
請求項２では、前記チャンバーは異なる容量のものと交換可能に構成されている。
請求項３では、前記分岐接続部と前記ワーク側減圧配管との間に開閉可能なバルブを設けてある。
請求項４では、前記分岐接続部と前記チャンバーとの間に開閉可能なバルブを設けてある。
A leak inspection apparatus according to claim 1 of the present invention includes:
A work-side decompression pipe to which the casing to be inspected and the pressure measuring means are connected;
Decompression means capable of decompressing the inside of the housing connected to the work side decompression pipe via a decompression pipe;
And a chamber that is branched and connected via a branch connection provided in the decompression pipe and that can be decompressed by the decompression means.
According to a second aspect of the present invention, the chamber is configured to be exchangeable with one having a different capacity.
In Claim 3, the valve which can be opened and closed is provided between the said branch connection part and the said work side pressure reduction piping.
According to a fourth aspect of the present invention, a valve that can be opened and closed is provided between the branch connection portion and the chamber.

本発明の請求項１に係るリーク検査装置によれば、
検査対象の筐体が接続されるワーク側減圧配管に分岐接続部を介してチャンバーが分岐接続されているので、減圧配管を減圧手段で減圧したときに、前記筐体の内部の圧力が急激に減少することを防止することができ、筐体内部の構成部品などを損傷することを防止できる。また、前記ワーク側減圧配管に外気を導入する場合でも筐体内部の圧力が急激に上昇しないので目標圧力の維持が容易である。
請求項２によれば、前記チャンバーは異なる容量のものと交換可能であるので、検査対象の筐体の容量に応じて適切な容量のチャンバーを接続して、より適切な検査が可能となる。
請求項３によれば、前記減圧配管と前記ワーク側減圧配管との間に開閉可能なバルブが設けられているので、リーク検査時においては、前記バルブを閉にすることにより、前記チャンバーによる減圧配管内の圧力変化に対する影響を排除して正確なリーク検査が可能となる。
請求項４によれば、前記分岐接続部と前記チャンバーとの間に開閉可能なバルブが設けられているので、比較的容量の小さい筐体を検査する際には前記バルブを開にして筐体内部の急激な圧力変化を防ぐことができ、比較的容量の大きい筐体を検査する際には前記バルブを閉にして、検査に要する時間の長時間化を防ぐことができる。
According to the leak inspection apparatus according to claim 1 of the present invention,
Since the chamber is branched and connected to the workpiece-side decompression pipe to which the casing to be inspected is connected via the branch connection portion, when the decompression pipe is decompressed by the decompression means, the pressure inside the casing suddenly increases. It is possible to prevent a decrease, and it is possible to prevent damage to components inside the housing. Further, even when outside air is introduced into the work-side decompression pipe, the pressure inside the housing does not increase rapidly, so that the target pressure can be easily maintained.
According to the second aspect, since the chamber can be replaced with one having a different capacity, a more appropriate inspection can be performed by connecting a chamber having an appropriate capacity according to the capacity of the casing to be inspected.
According to the third aspect of the present invention, since a valve that can be opened and closed is provided between the pressure reducing pipe and the work side pressure reducing pipe, when the leak inspection is performed, the valve is closed to reduce the pressure by the chamber. Exact influence on the pressure change in the piping is eliminated, and an accurate leak inspection becomes possible.
According to claim 4, since the valve that can be opened and closed is provided between the branch connection portion and the chamber, when inspecting a relatively small capacity housing, the valve is opened and the housing A sudden change in pressure inside can be prevented, and when inspecting a housing having a relatively large capacity, the valve can be closed to prevent the time required for the inspection from being prolonged.

本発明に係るリーク検査装置を用いたリーク検査の場合の説明図である。It is explanatory drawing in the case of the leak test | inspection using the leak test | inspection apparatus based on this invention. 前記リーク検査装置を用いたリーク検査における圧力変化の例を示す図である。It is a figure which shows the example of the pressure change in the leak test | inspection using the said leak test | inspection apparatus.

本発明に係るリーク検査装置は、
検査対象の筐体と圧力測定手段とが接続されるワーク側減圧配管と、
減圧配管を介して前記ワーク側減圧配管に接続された前記筐体の内部を減圧可能な減圧手段と、
前記減圧配管に設けられた分岐接続部を介して分岐接続されて前記減圧手段により減圧可能なチャンバーと
を備えていることを特徴としている。
A leak inspection apparatus according to the present invention includes:
A work-side decompression pipe to which the casing to be inspected and the pressure measuring means are connected;
Decompression means capable of decompressing the inside of the housing connected to the work side decompression pipe via a decompression pipe;
And a chamber that is branched and connected via a branch connection provided in the decompression pipe and that can be decompressed by the decompression means.

実施例１に係るリーク検査装置を用いて、検査対象の筐体のリーク検査を行う場合の接続図を、図１を参照して説明する。
図１において、
Ａはリーク検査装置であり、１は検査対象の筐体である。前記筐体１は、例えば携帯用無線通信機の筐体である。前記筐体１は、リーク検査装置Ａに設けられたワーク取付け部１１に取り付けられ、このワーク取付け部11には減圧配管接続部12が設けられている。前記筐体１には、リーク検査用孔が設けられており、このリーク検査用孔に減圧配管接続部12を接続することで、筐体１の内部を加圧、減圧することができる。
２はリーク検査装置Ａに内蔵された減圧ポンプである。この減圧ポンプ２は減圧配管３と前記ワーク取付け部11の減圧配管接続部12を介して筐体１のリーク検査用孔に接続されている。 A connection diagram in the case of performing a leak inspection of a casing to be inspected using the leak inspection apparatus according to the first embodiment will be described with reference to FIG.
In FIG.
A is a leak inspection apparatus, and 1 is a casing to be inspected. The housing 1 is, for example, a portable wireless communication device. The casing 1 is attached to a work attachment portion 11 provided in the leak inspection apparatus A. The work attachment portion 11 is provided with a pressure reducing pipe connection portion 12. The casing 1 is provided with a leak inspection hole. By connecting the pressure reducing pipe connecting portion 12 to the leak inspection hole, the inside of the casing 1 can be pressurized and depressurized.
Reference numeral 2 denotes a decompression pump built in the leak inspection apparatus A. The decompression pump 2 is connected to a leak inspection hole of the housing 1 via a decompression pipe 3 and a decompression pipe connection part 12 of the work attachment part 11.

前記減圧ポンプ２には、減圧制御用スピードコントローラ（以下、ポンプ用スピコンと呼ぶ。）21が設けられているので、減圧ポンプ２の減圧速度を手動で制御することができる。   The decompression pump 2 is provided with a decompression control speed controller (hereinafter referred to as a pump speed controller) 21, so that the decompression speed of the decompression pump 2 can be controlled manually.

検査対象の筐体１は、ワーク側減圧配管31を介して減圧、加圧が行われ、ワーク側減圧配管31の一方の端部には前記筐体１に取り付けられるワーク取付け部11が設けられた減圧配管接続部12が接続されている。前記ワーク側減圧配管31の他方の端部は２つに分岐されて、一方の分岐ライン311が電磁弁41を介してポンプ側ライン312に接続され、他方の分岐ライン313が電磁弁42を介して開放ライン314に接続されている。
前記電磁弁41は請求項３に記載されたバルブに対応する構成である。 The casing 1 to be inspected is depressurized and pressurized through the work-side decompression pipe 31, and a work attachment portion 11 that is attached to the casing 1 is provided at one end of the work-side decompression pipe 31. The reduced pressure pipe connecting part 12 is connected. The other end of the work side pressure reducing pipe 31 is branched into two, one branch line 311 is connected to the pump side line 312 via the electromagnetic valve 41, and the other branch line 313 is connected via the electromagnetic valve 42. Connected to the open line 314.
The electromagnetic valve 41 corresponds to the valve recited in claim 3.

前記電磁弁41、42は、リーク検査装置Ａに内蔵された制御部５によって制御される。
減圧配管３のワーク側減圧配管３１には圧力計43が取り付けられており、電磁弁41、42を閉にすることで、筐体１の内部を閉鎖して筐体１の内部の圧力を測定することができる。
前記圧力計43で測定された圧力は、前記制御部５によって監視されている。 The electromagnetic valves 41 and 42 are controlled by the control unit 5 built in the leak inspection apparatus A.
A pressure gauge 43 is attached to the work side decompression pipe 31 of the decompression pipe 3, and by closing the solenoid valves 41 and 42, the inside of the casing 1 is closed and the pressure inside the casing 1 is measured. can do.
The pressure measured by the pressure gauge 43 is monitored by the control unit 5.

減圧ポンプ２が接続された減圧配管３と筐体１が接続されたワーク側減圧配管31とは、電磁弁41と分岐接続部300を介して接続されている。
前記分岐接続部300と減圧ポンプ２との間には逆流防止用にチェックバルブ44が設けられており、空気等の流体が減圧ポンプ２側からワーク側に流れることを防止するように構成されている。 The pressure reducing pipe 3 to which the pressure reducing pump 2 is connected and the work side pressure reducing pipe 31 to which the housing 1 is connected are connected via an electromagnetic valve 41 and a branch connection part 300.
A check valve 44 is provided between the branch connection portion 300 and the decompression pump 2 for preventing backflow, and is configured to prevent a fluid such as air from flowing from the decompression pump 2 side to the workpiece side. Yes.

前記分岐接続部300には、安定時間制御スピードコントローラ（以下、圧力安定用スピコンと呼ぶ。）45が分岐接続されており、リーク検査工程において筐体１の内部の圧力が目標圧力よりも小さくなった際に、圧力安定用スピコン45から外気を電磁弁41を介して筐体１の内部に注入して、筐体１の内部の圧力を目標圧力に戻すように構成されている。   The branch connection section 300 is connected to a stable time control speed controller (hereinafter referred to as a pressure stabilization speed controller) 45 so that the pressure inside the housing 1 becomes lower than the target pressure in the leak inspection process. In this case, outside air is injected from the pressure stabilizing speed controller 45 into the housing 1 through the electromagnetic valve 41, and the pressure inside the housing 1 is returned to the target pressure.

電磁弁42には、開放ライン314を介して排気用マフラー46が接続されている。
リーク検査終了時に、電磁弁42を開とすることで、排気マフラー46から外気をワーク側減圧配管31を介して筐体１内部に注入して、筐体１内部を大気圧に復帰させるように構成されている。
前記分岐接続部300には、例えば容量が300ｃｃのダミーチャンバー６が分岐接続されており、減圧ポンプ２を作動させているときには、筐体１内部とともに、前記ダミーチャンバー６が減圧され、圧力安定用スピコン45から外気を注入する際には、筐体１内部に電磁弁41を介して外気が導入されるとともに、ダミーチャンバー６にも外気が導入される。
なお、ワーク側減圧配管31は分岐ライン311、313を含み、ワーク側減圧配管31には、ワーク取付け部11、圧力計43、電磁弁42、そして電磁弁41が接続されている。
減圧配管３はポンプ側減圧ライン312を含み、減圧配管３には、減圧ポンプ２、チェックバルブ44、安定時間制御用スピコン45、ダミーチャンバー６、そして電磁弁41が接続されている。前記電磁弁41は、前記減圧配管３と前記ワーク側減圧配管31の境界に配設されているといえる。そして、前記分岐接続部300では減圧配管３が４つに分岐され、それぞれ、チェックバルブ44、安定時間制御用スピコン45、ダミーチャンバー６、そして電磁弁41が分岐接続されている。 An exhaust muffler 46 is connected to the solenoid valve 42 via an open line 314.
At the end of the leak inspection, the solenoid valve 42 is opened, so that outside air is injected from the exhaust muffler 46 into the housing 1 through the work-side decompression pipe 31, and the interior of the housing 1 is returned to atmospheric pressure. It is configured.
For example, a dummy chamber 6 having a capacity of 300 cc is branchedly connected to the branch connection portion 300. When the decompression pump 2 is operated, the dummy chamber 6 is decompressed together with the inside of the housing 1 for pressure stabilization. When injecting outside air from the speed controller 45, outside air is introduced into the housing 1 via the electromagnetic valve 41, and outside air is also introduced into the dummy chamber 6.
The work side pressure reducing pipe 31 includes branch lines 311 and 313, and the work side pressure reducing pipe 31 is connected to the work mounting portion 11, the pressure gauge 43, the electromagnetic valve 42, and the electromagnetic valve 41.
The decompression pipe 3 includes a pump side decompression line 312, and the decompression pump 2, a check valve 44, a stable time control speed controller 45, a dummy chamber 6, and an electromagnetic valve 41 are connected to the decompression pipe 3. It can be said that the electromagnetic valve 41 is disposed at the boundary between the pressure reducing pipe 3 and the work side pressure reducing pipe 31. In the branch connection section 300, the decompression pipe 3 is branched into four, and the check valve 44, the stable time control speed controller 45, the dummy chamber 6 and the electromagnetic valve 41 are branched and connected, respectively.

次に、目標圧力を−10KPaとしてリーク検査を行う場合について説明する。
ワーク取付け部11に設けられた減圧配管接続部12に検査対象の筐体１を取り付けて、制御部５の操作パネルの「スタートスイッチ」を操作してリーク検査を開始させるように指示すると、制御部５は、電磁弁41を開、電磁弁42を閉に制御して、減圧ポンプ２を作動させる。
この際、ワーク取付け部に取り付けた筐体１の内部とともにダミーチャンバー６の内部も減圧される。
したがって、ワーク取付け部11に取り付けた筐体１の内部容量が小さいものであっても、その筐体の内部とダミーチャンバー６の内部とがまとめて減圧されるので、筐体１の内部が急激に減圧されるという不具合は発生せず、筐体１内部の部品等を損傷させることもない。 Next, a case where the leak inspection is performed with the target pressure set to −10 KPa will be described.
When the casing 1 to be inspected is attached to the pressure reducing pipe connecting portion 12 provided in the work attaching portion 11, and the operation of the “start switch” on the operation panel of the control portion 5 is instructed to start the leak inspection, the control is performed. The unit 5 controls the opening of the electromagnetic valve 41 and closes the electromagnetic valve 42 to operate the decompression pump 2.
At this time, the inside of the dummy chamber 6 is decompressed together with the inside of the housing 1 attached to the work attachment portion.
Therefore, even if the internal capacity of the housing 1 attached to the workpiece attaching portion 11 is small, the inside of the housing and the inside of the dummy chamber 6 are collectively decompressed, so that the inside of the housing 1 is suddenly reduced. Therefore, there is no inconvenience that the pressure is reduced, and parts inside the housing 1 are not damaged.

以上のようなリーク検査工程において、圧力計43で監視している筐体１の内部の圧力が目標の−10KPaに到達すると、電磁弁41を開にしたまま制御部５は減圧ポンプ２を停止させる。（図２の「Ｃ」参照。）
減圧ポンプ２が停止しても、しばらくは筐体１から気体の流出が続き、圧力は下がり続ける。
このようにして、圧力が下がり過ぎた場合には、圧力安定用スピコン45から電磁弁41を介して外気が導入されるので、筐体１内部の圧力は目標圧力に戻される。（図２の「Ｄ」参照。）この際の外気導入は、圧力安定用スピコン45の開放度に依存するものであり、筐体１内部のみならず、ダミーチャンバー６にも外気が導入される。
圧力安定用スピコン45から導入された外気は、筐体１内部のみならず、ダミーチャンバー６にも流入するので、筐体１内部の圧力が急激に上昇して目標圧力を越えることは抑止される。 In the leak inspection process as described above, when the pressure inside the housing 1 monitored by the pressure gauge 43 reaches the target −10 KPa, the control unit 5 stops the decompression pump 2 with the electromagnetic valve 41 open. Let (See “C” in FIG. 2.)
Even if the decompression pump 2 is stopped, the outflow of gas from the casing 1 continues for a while and the pressure continues to decrease.
In this way, when the pressure has dropped too much, outside air is introduced from the pressure stabilizing speed controller 45 via the electromagnetic valve 41, so that the pressure inside the housing 1 is returned to the target pressure. (Refer to “D” in FIG. 2) The introduction of the outside air at this time depends on the degree of opening of the pressure stabilizing speed controller 45, and the outside air is introduced not only into the housing 1 but also into the dummy chamber 6. .
Since the outside air introduced from the pressure stabilizing speed controller 45 flows not only into the housing 1 but also into the dummy chamber 6, it is possible to prevent the pressure inside the housing 1 from rapidly rising and exceeding the target pressure. .

制御部５は、圧力計43を監視することで、目標圧力以下であった筐体１内部の圧力が目標圧力に到達したことを検出すると、電磁弁41を閉じ、筐体１内部を孤立させる。（図２の「Ｄ」参照。）
そして、圧力計43を監視して、筐体１内部の圧力が一定の監視時間（図２の「Ｄ」〜「Ｅ」参照。）の間でどの程度変化するかを監視して検査する。 When the control unit 5 monitors the pressure gauge 43 to detect that the pressure inside the housing 1 that is equal to or lower than the target pressure has reached the target pressure, the control unit 5 closes the electromagnetic valve 41 and isolates the inside of the housing 1. . (See “D” in FIG. 2.)
Then, the pressure gauge 43 is monitored to check how much the pressure inside the housing 1 changes during a certain monitoring time (see “D” to “E” in FIG. 2).

以上のようにして、制御部５は、圧力計43を監視して、一定時間の間における筐体１内部の圧力が例えば図２の太線で示したように、所定のしきい値範以下であれば、監視時間における圧力変化は小さく、筐体１にはリークはないものとして、ブザーを鳴らし、制御部５の操作パネルの「ＧＯＯＤ」ランプを点灯させて、リーク検査合格を報知する。
一定時間の間における筐体内部の圧力変化が例えば図２の一点鎖線で示したように、所定のしきい値範囲を越えて上昇すれば、筐体１にはリークが発生しているものとして、ブザーを鳴らし、制御部５の操作パネルの「ＮＧ」ランプを点灯させて、リーク検査不合格を報知する。
そして、リーク検査終了後に、電磁弁42を開とすることで排気用マフラー46から外気を筐体１内部に導入し、筐体１内部の圧力を外気と同じ大気圧に復帰させて、検査が終了した筐体をワーク取付け部11から取り外す。
このようにして、検査対象の筐体１のリーク検査を終了するのである。 As described above, the control unit 5 monitors the pressure gauge 43, and the pressure inside the housing 1 during a predetermined time is, for example, below a predetermined threshold range as shown by the thick line in FIG. If there is, the pressure change during the monitoring time is small, and it is assumed that there is no leak in the housing 1, and a buzzer is sounded, and the “GOOD” lamp on the operation panel of the control unit 5 is turned on to notify the leak inspection pass.
If the pressure change inside the casing during a certain period of time rises beyond a predetermined threshold range as shown by, for example, the one-dot chain line in FIG. 2, it is assumed that the casing 1 is leaking. The buzzer is sounded, and the “NG” lamp on the operation panel of the control unit 5 is turned on to notify the failure of the leak inspection.
After the leak inspection is completed, the electromagnetic valve 42 is opened to introduce outside air into the housing 1 from the exhaust muffler 46, and the pressure inside the housing 1 is returned to the same atmospheric pressure as the outside air. The completed housing is removed from the workpiece attachment portion 11.
In this way, the leak inspection of the casing 1 to be inspected is completed.

なお、ダミーチャンバー６の容量が300ｃｃの場合には、検査対象の筐体の容量としては、１ｃｃから300ｃｃが適している。そこで、前記ダミーチャンバー６を交換可能に構成し、例えば小容量のダミーチャンバーを装着したり、大容量のダミーチャンバーを装着したできるように構成してもよい。検査対象の筐体の内部容量が小さい場合には、大きすぎる容量のダミーチャンバーを用いると余分な減圧時間を要したりして能率よく検査できないので、小容量のダミーチャンバーを装着してリーク検査を行う。一方、検査対象の筐体の内部容量が大きい場合には、小さな容量のダミーチャンバーを用いると十分なチャンバー効果が得られず急激な圧力変動が発生するので、大容量のダミーチャンバーを装着してリーク検査を行う。   When the capacity of the dummy chamber 6 is 300 cc, 1 cc to 300 cc is suitable as the capacity of the casing to be inspected. Therefore, the dummy chamber 6 may be configured to be replaceable, and for example, a small-capacity dummy chamber may be mounted or a large-capacity dummy chamber may be mounted. If the internal volume of the case to be inspected is small, using a dummy chamber with an excessively large capacity will require extra decompression time and cannot be inspected efficiently. I do. On the other hand, if the internal volume of the housing to be inspected is large, using a small-capacity dummy chamber will not provide a sufficient chamber effect and abrupt pressure fluctuation will occur. Perform a leak test.

前記圧力安定用スピコン45を調整することで、目標圧力より低くなった筐体内部の圧力が目標圧力に到達するまでの時間を調整することができる。
ポンプ側減圧ライン312上の分岐接続部300とダミーチャンバー６との間に、破線で示したようにチャンバー用バルブ47を設けた構成としてもよい。このチャンバー用バルブ47は請求項４に記載されたバルブに対応する構成である。
このような構成によれば、比較的容量の小さい筐体を検査する際には前記チャンバー用バルブ47を開にして筐体内部の急激な圧力変化を防ぐことができ、比較的容量の大きい筐体を検査する際には前記チャンバー用バルブ47を閉にして、検査に要する時間の長時間化を防ぐことができる。
なお、検査対象の筐体１を接続する前に、ワーク取付け部11の減圧配管接続部12を完全に塞いだ状態でリーク検査装置Ａ本体の動作テストを行う。
また、前記リーク検査装置Ａにおけるリーク検査の開始／停止をリモート操作するためのリモコンユニットを備えてもよい。 By adjusting the pressure stabilizing speed controller 45, it is possible to adjust the time until the pressure inside the housing that has become lower than the target pressure reaches the target pressure.
A chamber valve 47 may be provided between the branch connection part 300 on the pump-side decompression line 312 and the dummy chamber 6 as indicated by a broken line. The chamber valve 47 corresponds to the valve described in claim 4.
According to such a configuration, when inspecting a housing having a relatively small capacity, the chamber valve 47 can be opened to prevent a sudden change in pressure inside the housing, and the housing having a relatively large capacity can be prevented. When inspecting the body, the chamber valve 47 can be closed to prevent an increase in the time required for the inspection.
Before connecting the casing 1 to be inspected, an operation test of the main body of the leak inspection apparatus A is performed in a state where the pressure reducing pipe connecting portion 12 of the work mounting portion 11 is completely closed.
Further, a remote control unit for remotely operating start / stop of the leak inspection in the leak inspection apparatus A may be provided.

以上の実施形態においては、エアリーク検査を目的として気体を減圧して気体のリークを検査する場合を想定して説明したが、気体に限らず液体などの流体のリーク検査を目的とする場合には減圧ポンプに代えて流体吸引ポンプを用いて、配管上の流体の圧力を監視すればよい。
In the above embodiment, the description has been made assuming that the gas is depressurized and the gas leak is inspected for the purpose of air leak inspection. What is necessary is just to monitor the pressure of the fluid on piping, using a fluid suction pump instead of a pressure reduction pump.

Ａ リーク検査装置
１ 筐体
２ 減圧ポンプ
３ 減圧配管
31 ワーク側減圧配管
300 分岐接続部
311 分岐ライン
312 ポンプ側減圧ライン
313 分岐ライン
314 開放ライン
42 電磁弁
43 圧力計
44 チェックバルブ
47 チャンバー用バルブ
５ 制御部 A Leak inspection device 1 Housing 2 Pressure reducing pump 3 Pressure reducing piping
31 Workpiece side decompression piping
300 branch connection
311 Branch line
312 Pump side decompression line
313 branch line
314 Open line
42 Solenoid valve
43 Pressure gauge
44 Check valve
47 Valve 5 controller for chamber

Claims (4)

検査対象の筐体と圧力測定手段とが接続されるワーク側減圧配管と、
減圧配管を介して前記ワーク側減圧配管に接続された前記筐体の内部を減圧可能な減圧手段と、
前記減圧配管に設けられた分岐接続部を介して分岐接続されて前記減圧手段により減圧可能なチャンバーと
を備えていることを特徴とするリーク検査装置。 A work-side decompression pipe to which the casing to be inspected and the pressure measuring means are connected;
Decompression means capable of decompressing the inside of the housing connected to the work side decompression pipe via a decompression pipe;
A leak inspection apparatus comprising: a chamber that is branched and connected via a branch connection provided in the decompression pipe and can be decompressed by the decompression means. 前記チャンバーは異なる容量のものと交換可能に構成されていることを特徴とする請求項１に記載のリーク検査装置。 The leak inspection apparatus according to claim 1, wherein the chamber is configured to be exchangeable with one having a different capacity. 前記分岐接続部と前記ワーク側減圧配管との間に開閉可能なバルブを設けてあることを特徴とする請求項１、２の何れか１項に記載のリーク検査装置。 The leak inspection apparatus according to claim 1, wherein a valve that can be opened and closed is provided between the branch connection portion and the work-side decompression pipe. 前記分岐接続部と前記チャンバーとの間に開閉可能なバルブを設けてあることを特徴とする請求項１、２、３の何れか１項に記載のリーク検査装置。 The leak inspection apparatus according to claim 1, wherein a valve that can be opened and closed is provided between the branch connection portion and the chamber.
JP2009188968A 2009-08-18 2009-08-18 Leak inspection device Expired - Fee Related JP5463789B2 (en)

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* Cited by examiner, † Cited by third party
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JP2013236261A (en) * 2012-05-09 2013-11-21 Ntt Docomo Inc Radio communication system and radio base station
WO2019004087A1 (en) * 2017-06-28 2019-01-03 日立オートモティブシステムズ株式会社 Method for detecting sealed state of cylinder device, and device for detecting sealed state

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JPH11304633A (en) * 1998-04-21 1999-11-05 Matsushita Electric Works Ltd Air-leak detecting apparatus
JP2001141597A (en) * 1999-11-17 2001-05-25 Cosmo Instruments Co Ltd Temperature measuring device of leakage test device and leakage test device
JP2001228047A (en) * 2000-02-17 2001-08-24 Fukuda:Kk Volume-adjusting method in air leak testing device and air leak testing device having volume adjusting function

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Publication number Priority date Publication date Assignee Title
JPH11304633A (en) * 1998-04-21 1999-11-05 Matsushita Electric Works Ltd Air-leak detecting apparatus
JP2001141597A (en) * 1999-11-17 2001-05-25 Cosmo Instruments Co Ltd Temperature measuring device of leakage test device and leakage test device
JP2001228047A (en) * 2000-02-17 2001-08-24 Fukuda:Kk Volume-adjusting method in air leak testing device and air leak testing device having volume adjusting function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013236261A (en) * 2012-05-09 2013-11-21 Ntt Docomo Inc Radio communication system and radio base station
WO2019004087A1 (en) * 2017-06-28 2019-01-03 日立オートモティブシステムズ株式会社 Method for detecting sealed state of cylinder device, and device for detecting sealed state

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