JP2012146567A - On-vehicle battery vent plug inspection method - Google Patents

On-vehicle battery vent plug inspection method Download PDF

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JP2012146567A
JP2012146567A JP2011005059A JP2011005059A JP2012146567A JP 2012146567 A JP2012146567 A JP 2012146567A JP 2011005059 A JP2011005059 A JP 2011005059A JP 2011005059 A JP2011005059 A JP 2011005059A JP 2012146567 A JP2012146567 A JP 2012146567A
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pressure
inspection
air
vent plug
valve body
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JP4871415B1 (en
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Yutaka Minoura
裕 箕浦
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YASHIMA KK
YASHIMA PRODUCTS
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YASHIMA PRODUCTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Examining Or Testing Airtightness (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle battery vent plug inspection method which has made it possible to precisely discriminate between two types of air tightness defects, excessive leakage and minute leakage.SOLUTION: The inspection method includes a first inspection step in which air is fed in under pressure using an exhaust hole 23 of a vent plug V as a pressure feeding hole 6, and detection is made to see if the pressure-fed air reaches a reference atmospheric pressure to determine excessive leakage (an air tightness defect of a valve body, or the vent plug, where a reference atmospheric pressure is not reached even when air is fed in for a prescribed time) and a second inspection step in which pressure-feeding of air through the exhaust hole is stopped and a difference between atmospheric pressure and the reference atmospheric pressure is detected a certain time after the stoppage to determine minute leakage (an air tightness defect of a valve body, or the vent plug, where, although the reference atmospheric pressure is reached in the first inspection step, there is minute leakage).

Description

本発明は自動車に搭載されたバッテリーの液口を塞ぐプラグ、特に車載バッテリー内部で発生したガスを排気する弁体を備えたベントプラグの検査方法に関するものである。   The present invention relates to a method for inspecting a plug for closing a liquid port of a battery mounted on an automobile, in particular, a vent plug provided with a valve body that exhausts gas generated inside a vehicle-mounted battery.

通常、車載バッテリーにおいては、その内部で発生する水素等のガスによる暴発防止のため、上記ガスの圧力が高まった場合に当該ガスの排気を許容する弁体を備えたベントプラグを設けている。   Usually, in-vehicle batteries are provided with a vent plug provided with a valve body that allows the gas to be exhausted when the pressure of the gas is increased, in order to prevent the gas from being exhausted by a gas such as hydrogen generated inside.

上記ベントプラグは車載バッテリー内部で発生したガスを通気する通気孔と、該通気孔から流入したガスを外部に排気する排気孔と、上記通気孔を形成する弁座の上記排気孔側表面に加圧密着して該通気孔を閉鎖する弁体とを備え、車載バッテリー内部のガス圧が高まると当該ガス圧により上記弁体が上記通気孔を開放し上記排気孔からのガス排気を許容する構造となっている。   The vent plug is added to a vent hole for venting a gas generated inside the vehicle-mounted battery, an exhaust hole for exhausting the gas flowing in from the vent hole to the outside, and the exhaust hole side surface of the valve seat forming the vent hole. And a valve body that closes the vent hole by pressure contact, and when the gas pressure inside the in-vehicle battery increases, the valve body opens the vent hole by the gas pressure and allows gas exhaust from the exhaust hole. It has become.

しかし、上記弁体の未装着や閉鎖不良等の弁体の気密瑕疵により上記通気孔と上記排気孔が連通する状態にあると、ガス排気ができたとしても、内部に存するバッテリー液の水分が上記通気孔から蒸発し該バッテリー液の濃度が高まってバッテリー能力の低下を来してしまう。   However, if the vent hole and the exhaust hole are in communication with each other due to the valve body not being attached or poorly closed, the moisture of the battery liquid present inside will be exhausted even if the gas is exhausted. It evaporates from the vent hole and the concentration of the battery liquid increases, resulting in a decrease in battery capacity.

そのため、上記弁体の気密瑕疵を検出する検査が必須となる。斯かる検査としては、下記特許文献１に示す検査方法が既知である。   Therefore, an inspection for detecting airtight flaws of the valve body is essential. As such an inspection, an inspection method shown in Patent Document 1 below is known.

該特許文献１に示す検査方法は、送気ポンプによりベントプラグの排気孔からベントプラグ内に空気を送り込み、該空気を送り込んでから所定時間が経過した時点、即ち、空気圧送開始から所定時間経過後の該圧送空気の気圧を測定し、該気圧が基準気圧に達しているか否かを検出し、弁体の気密瑕疵を判別する方法である。   The inspection method disclosed in Patent Document 1 is such that air is fed into the vent plug from the vent hole of the vent plug by an air feed pump, and a predetermined time has elapsed since the air was fed, that is, a predetermined time has elapsed since the start of pneumatic feeding. This is a method of determining the airtight flaw of the valve body by measuring the air pressure of the pumped air afterwards and detecting whether or not the air pressure reaches the reference air pressure.

特開２００４−２２０９２１号公報JP 2004-220921 A

上記の通り、従来の検査方法は送気ポンプによる圧送空気の圧力変化を検出して弁体の気密瑕疵を判別する方法であり、この検査方法は、弁体の未装着、弁体の周縁のまくれ上がり、弁体の傾斜装着、弁体の割れ等の弁体自身に起因する漏れ、所謂過大漏れ（気密瑕疵）を判別する方法として有効である。   As described above, the conventional inspection method is a method for determining the airtight fistula of the valve body by detecting the pressure change of the pumped air by the air supply pump. It is effective as a method for discriminating leakage caused by the valve body itself such as turning up, tilting of the valve body, cracking of the valve body, etc., so-called excessive leakage (air-tight leak).

しかしながら、上記従来検査方法による検査では、弁体と弁座間に塵埃や微細繊維屑等の微細異物が介在し微小漏れ（気密瑕疵）を生じているベントプラグの場合には、送気ポンプによる圧送空気の気圧が上記基準気圧に達してしまい、見かけ上、気密瑕疵がないと判別されて、使用に供されてしまう問題点を有している。   However, in the inspection by the above conventional inspection method, in the case of a vent plug in which minute foreign matters such as dust and fine fiber scraps are present between the valve body and the valve seat and a minute leak (airtight flaw) is generated, the pressure feeding by the air feeding pump is performed. There is a problem that the air pressure reaches the above-mentioned reference pressure, and it is determined that there is no air-tight flaw and is used.

通常、上記弁体を加圧密着する上記弁座表面にシリコンオイルを塗布して気密性向上を図る方法が採られているが、このシリコンオイルに空気中に漂う塵埃や微細繊維屑等の微細異物が付着してしまい、これが上記微小漏れの主たる原因となっていることを発明者らは見出した。   Normally, a method of improving the airtightness by applying silicone oil to the valve seat surface, which pressurizes and adheres to the valve body, has been adopted. However, the silicon oil has a fine structure such as dust and fine fiber scraps floating in the air. The inventors have found that foreign matter has adhered, and this is the main cause of the above-described minute leakage.

近年においては、ハイブリッドカーに代表される大容量の車載バッテリーを必要とする車種では、車載バッテリーがトランクルームの奥等のメンテナンスが困難な場所に配置される場合があり、このような場合にはできるだけ車載バッテリーをメンテナンスフリーにしておく必要があり、この点からも上記微小漏れ（気密瑕疵）を検出する検査方法が強く要望されている。   In recent years, in vehicles that require a large-capacity on-board battery such as a hybrid car, the on-board battery may be placed in a place where maintenance is difficult such as in the back of a trunk room. It is necessary to keep the in-vehicle battery maintenance-free, and from this point of view, there is a strong demand for an inspection method for detecting the above-described minute leakage (airtight flaw).

本発明は上記過大漏れと微小漏れの双方の気密瑕疵を的確に判別可能とした車載バッテリー用ベントプラグの検査方法を提供する。   The present invention provides an in-vehicle battery vent plug inspection method capable of accurately discriminating between air leaks of both excessive leakage and minute leakage.

要述すると、上記ベントプラグの排気孔を圧送孔として使用して空気を圧送し、該圧送された空気が基準気圧に達するか否かを検出して過大漏れ（所定時間空気を圧送しても基準気圧に達しない弁体即ちベントプラグの気密瑕疵）を判別する第一検査工程を具備すると共に、上記排気孔を通じての空気圧送を停止し、該停止から一定時間経過後の気圧と上記基準気圧との差圧を検出して微小漏れ（上記第一検査工程で基準気圧に達したが微小漏れを生じている弁体即ちベントプラグの気密瑕疵）を判別する第二検査工程を具備する。   Briefly, air is pumped using the vent hole of the vent plug as a pumping hole, and it is detected whether or not the pumped air reaches a reference atmospheric pressure. A first inspection step for discriminating a valve body that does not reach the reference atmospheric pressure, that is, an airtight flaw of the vent plug), and stops the air pressure feeding through the exhaust hole, and the atmospheric pressure after the lapse of a certain time from the stop and the reference atmospheric pressure. And a second inspection step for discriminating a minute leak (a valve element that has reached the reference pressure in the first inspection step but has a minute leak, that is, an airtight flaw of the vent plug).

本発明に係る検査方法によれば、上記第一検査工程で圧送空気が基準気圧に達しない過大漏れ（気密瑕疵）を生じている弁体を有するベントプラグを判別すると共に、上記第二検査工程で上記第一検査工程において基準気圧に達したが微小漏れ（気密瑕疵）を生じている弁体を有するベントプラグを判別し、過大漏れと微小漏れの双方の気密瑕疵を的確に判別して真に正常なベントプラグのみを使用に供することができる。   According to the inspection method of the present invention, it is possible to discriminate a vent plug having a valve body that causes an excessive leak (airtight soot) in which the pumped air does not reach the reference atmospheric pressure in the first inspection step, and the second inspection step. In the first inspection step, the vent plug having a valve element that has reached the reference pressure but has a minute leak (air-tight flaw) is discriminated. Only normal vent plugs can be used.

本発明に係る検査方法の検査対象となる車載バッテリー用ベントプラグの斜視図である。It is a perspective view of the vent plug for vehicle-mounted batteries used as the test object of the test method according to the present invention. 図１のＡ−Ａ線端面図である。It is an AA line end view of FIG. （Ａ）は制御弁の分解斜視図、（Ｂ）は同拡大端面図である。(A) is an exploded perspective view of the control valve, and (B) is an enlarged end view thereof. 本発明に係る検査方法を概示する説明図である。It is explanatory drawing which outlines the inspection method which concerns on this invention. 本発明に係る検査方法のフローチャートである。3 is a flowchart of an inspection method according to the present invention. 第一検査工程及び第二検査工程における気圧変化を例示するグラフである。It is a graph which illustrates the atmospheric pressure change in the 1st inspection process and the 2nd inspection process. 弁体と弁座間に微細異物が介在した状態を説明する説明図である。It is explanatory drawing explaining the state which the fine foreign material intervened between the valve body and the valve seat. 本発明に係る検査方法で使用する検査装置を概示する説明図である。It is explanatory drawing which outlines the inspection apparatus used with the inspection method which concerns on this invention. 検査装置のセット部を示す説明図である。It is explanatory drawing which shows the setting part of an inspection apparatus. 検査装置の検査部を示す説明図である。It is explanatory drawing which shows the test | inspection part of a test | inspection apparatus. 上記検査部の検査ヘッドが降動した状態を説明する説明図である。It is explanatory drawing explaining the state which the test | inspection head of the said test | inspection part descended. 検査装置の不良品回収部を示す説明図である。It is explanatory drawing which shows the inferior goods collection part of an inspection apparatus. 第一ノズル又は第二ノズルによりベントプラグを吹き飛ばす構成を説明する説明図である。It is explanatory drawing explaining the structure which blows off a vent plug by a 1st nozzle or a 2nd nozzle. 検査装置の良品回収部を示す説明図である。It is explanatory drawing which shows the non-defective product collection | recovery part of an inspection apparatus.

以下本発明を実施するための最良の形態を図１乃至図１４に基づき説明する。   The best mode for carrying out the present invention will be described below with reference to FIGS.

本発明に係る検査方法の検査対象たる車載バッテリー用ベントプラグＶは、図１・図２に示すように、操作溝２１ａ付きの頭部２１と該頭部２１から垂下する軸部２２とを有し、該頭部２１に車載バッテリー内部で発生したガスを排気する一対の排気孔２３を穿設すると共に、該排気孔２３から続く内部空間に制御弁２４を配設する構成となっている。   The in-vehicle battery vent plug V to be inspected by the inspection method according to the present invention has a head 21 with an operation groove 21a and a shaft portion 22 hanging from the head 21 as shown in FIGS. The head 21 is provided with a pair of exhaust holes 23 for exhausting the gas generated inside the in-vehicle battery, and a control valve 24 is provided in an internal space extending from the exhaust hole 23.

又上記制御弁２４は、図３にも示すように、上記ガスを通気する通気孔２５を形成する弁座２６を有する弁ケース２７と、該弁ケース２７の弁座２６の上記排気孔２３側表面に加圧密着して上記通気孔２５を閉鎖する弁体２８と、該弁体２８上に弾性体２９を介して挿着される押さえ板３０とを備える構成となっている。尚図中３０ａは上記押さえ板３０に設けられた一対の通気口である。   As shown in FIG. 3, the control valve 24 includes a valve case 27 having a valve seat 26 that forms a vent hole 25 for venting the gas, and the exhaust hole 23 side of the valve seat 26 of the valve case 27. The valve body 28 is configured to include a valve body 28 that pressurizes and adheres to the surface to close the vent hole 25, and a pressing plate 30 that is inserted onto the valve body 28 via an elastic body 29. In the figure, reference numeral 30a denotes a pair of vent holes provided in the pressing plate 30.

上記構成から成る検査対象の車載バッテリー用ベントプラグＶは車載バッテリー内部のガス圧が高まると当該ガス圧により上記弁体２８が弾性体２９を圧縮して持ち上がって通気孔２５を開放し通気口３０ａと連通する通気経路を画成して、上記排気孔２３からのガス排気を許容する構造となっている。   When the gas pressure inside the in-vehicle battery increases, the vent plug V for the in-vehicle battery having the above-described configuration is raised by compressing the elastic body 29 by the gas pressure, thereby opening the vent hole 25 and the vent hole 30a. An air passage that communicates with the exhaust hole 23 is defined, and gas exhaust from the exhaust hole 23 is allowed.

本発明に係る検査方法の実施においては、まず、図４・図５に示すように、検査対象のベントプラグＶの頭部２１に検査ヘッド１をシール部材２を介して加圧密着し、排気孔２３を覆う気密空間Ｓを画成する。   In carrying out the inspection method according to the present invention, first, as shown in FIGS. 4 and 5, the inspection head 1 is press-contacted to the head 21 of the vent plug V to be inspected via the seal member 2 and exhausted. An airtight space S covering the hole 23 is defined.

上記検査ヘッド１にはコンプレッサー３により圧送された空気を上記気密空間Ｓに圧送するエアチューブ４が接続されており、該エアチューブ４には気圧を測定する測定器５が接続されている。   The inspection head 1 is connected to an air tube 4 that pumps air compressed by a compressor 3 to the airtight space S, and a measuring device 5 that measures the atmospheric pressure is connected to the air tube 4.

次いで、図５に示すように、上記気密空間Ｓにコンプレッサー３からエアチューブ４を通じての空気圧送を開始し、ベントプラグＶの排気孔２３を圧送孔６として使用して空気をベントプラグＶ内へ圧送する。この際に、空気圧送開始から所定時間経過後の気圧を測定器５で測定し、該気圧が基準気圧に達するか否かを検出し、弁体２８の気密瑕疵を判別する（第一検査工程）。   Next, as shown in FIG. 5, pneumatic supply from the compressor 3 to the airtight space S through the air tube 4 is started, and the air is sent into the vent plug V using the exhaust hole 23 of the vent plug V as the pressure feed hole 6. Pump. At this time, the air pressure after a predetermined time has elapsed from the start of the air pressure feeding is measured by the measuring device 5 to detect whether or not the air pressure reaches the reference air pressure, and the airtight flaw of the valve body 28 is determined (first inspection step). ).

上記第一検査工程にあっては、弁体２８の未装着、弁体２８の周縁のまくれ上がり、弁体２８の傾斜装着、弁体２８の割れ等の弁体２８自身に起因する過大漏れ（気密瑕疵）を的確に判別することができる。   In the first inspection step, excessive leakage caused by the valve body 28 itself such as the valve body 28 not being mounted, the valve body 28 being rolled up, the valve body 28 being tilted, the valve body 28 being cracked, etc. It is possible to accurately determine airtightness.

即ち、上記過大漏れが生じている場合には、圧送空気が通気口３０ａを通じて通気孔２５から漏れてしまい、所定時間までに基準気圧に達しないため、所定時間経過までに基準気圧に達するか否かを検出することにより的確に過大漏れ（気密瑕疵）の有無を判別することができる。   That is, when the excessive leak occurs, the pumped air leaks from the vent hole 25 through the vent 30a and does not reach the reference pressure by a predetermined time. By detecting this, it is possible to accurately determine whether there is an excessive leak (airtight flaw).

例えば、図６に示すように、空気圧送開始から０．７秒を上記第一検査工程における所定時間とすると、空気圧送開始から０．７秒経過時に基準気圧に達するＰ１のグラフのような場合には過大漏れ（気密瑕疵）が生じていないと判断し、空気圧送開始から０．７秒経過時に基準気圧に達しないＰ２のグラフのような場合には過大漏れ（気密瑕疵）が生じていると判断することができ、過大漏れ（気密瑕疵）の有無を的確に判別する。   For example, as shown in FIG. 6, when 0.7 seconds from the start of pneumatic feeding is defined as the predetermined time in the first inspection step, as in a graph of P1 that reaches the reference atmospheric pressure after 0.7 seconds from the start of pneumatic feeding. It is judged that there is no excessive leakage (airtight flaw), and in the case of the P2 graph where the reference pressure is not reached when 0.7 seconds have passed since the start of air pressure feeding, an excessive leakage (airtight flaw) has occurred. It is possible to determine whether there is an excessive leak (airtight flaw) or not.

次いで、図５に示すように、上記排気孔２３（圧送孔６）を通じての空気圧送を停止し、該停止から所定時間経過後の気圧を測定器５で測定し該気圧と上記基準気圧との差圧を検出する。そして、検出した差圧が基準差圧の範囲内か否かを判別することにより、弁体２８の気密瑕疵を判別する（第二検査工程）。   Next, as shown in FIG. 5, the pneumatic feeding through the exhaust hole 23 (pressure feeding hole 6) is stopped, and the atmospheric pressure after a predetermined time has elapsed from the stop is measured by the measuring instrument 5, and the atmospheric pressure and the reference atmospheric pressure are measured. Detect differential pressure. Then, it is determined whether or not the detected differential pressure is within the range of the reference differential pressure, thereby determining the airtight flaw of the valve element 28 (second inspection step).

上記第二検査工程にあっては、上記第一検査工程において基準気圧に達し過大漏れ（気密瑕疵）が生じていないと判別された弁体２８に対しても、図７に示すような弁体２８と弁座２６間に塵埃や微細繊維屑等の微細異物Ｄが介在し弁体２８が僅かに持ち上がることに起因する微小漏れ（気密瑕疵）を的確に判別することができる。   In the second inspection process, the valve body as shown in FIG. 7 is also used for the valve body 28 that has been determined that the reference pressure has been reached and no excessive leakage (airtight flaw) has occurred in the first inspection process. A minute leak (air-tight flaw) caused by a slight lifting of the valve element 28 due to the presence of minute foreign matter D such as dust or fine fiber waste between the valve seat 26 and the valve seat 26 can be accurately determined.

即ち、上記図７に示すような弁体２８と弁座２６間に微細異物Ｄが介在し弁体２８が僅かに持ち上がっている場合には、空気圧送継続時には弁体２８の周縁が下方に押圧されて漏れが生じないか、或いは、極少量の漏れであるため第一検査工程においては基準気圧に達してしまい、見かけ上、気密瑕疵がないと判別されてしまう恐れがあるが、第二検査工程では空気圧送を停止し、該停止後から所定時間経過後に気圧を測定し該気圧と基準気圧との差圧を検出することにより微小漏れ（気密瑕疵）を的確に判別する。   That is, when the fine foreign matter D is interposed between the valve body 28 and the valve seat 26 as shown in FIG. 7 and the valve body 28 is slightly lifted, the peripheral edge of the valve body 28 is pressed downward when the air pressure feeding is continued. In the first inspection process, there is a risk that it will be judged that there is no airtight flaw, but there is a risk that it will be judged that there is no airtight flaw. In the process, air pressure feeding is stopped, and after a predetermined time has passed since the stop, the atmospheric pressure is measured, and the differential pressure between the atmospheric pressure and the reference atmospheric pressure is detected, so that a minute leak (airtight flaw) is accurately determined.

例えば、図６に示すように、空気圧送停止から３秒を上記第二検査工程における所定時間とすると、空気圧送停止から３秒経過時に基準気圧との差圧が基準差圧の範囲を超えていないＰ３のグラフのような場合には微小漏れ（気密瑕疵）が生じていないと判断し、空気圧送停止から３秒経過時に基準気圧との差圧が基準差圧の範囲を超えているＰ４のグラフのような場合には微小漏れ（気密瑕疵）が生じていると判断することができ、微小漏れ（気密瑕疵）の有無を的確に判別する。   For example, as shown in FIG. 6, assuming that 3 seconds from the stop of pneumatic feeding is the predetermined time in the second inspection step, the differential pressure from the reference pressure exceeds the range of the reference differential pressure after 3 seconds from the stop of pneumatic feeding. If there is no P3 graph, it is determined that a minute leak (airtight flaw) has not occurred, and the pressure difference from the reference pressure exceeds the range of the reference pressure difference after 3 seconds from the stop of pneumatic supply. In the case of a graph, it can be determined that a minute leak (airtight flaw) has occurred, and the presence or absence of a minute leak (airtight flaw) is accurately determined.

尚上記第二検査工程にあっては、弁体２８の気密瑕疵でなくとも、例えば、ベントプラグＶの内部空間に上記制御弁２４が僅かに傾斜して配設され、該制御弁２４の弁ケース２７とベントプラグＶの内壁間に隙間が生じて微小漏れ（気密瑕疵）が生じている場合に当該微小漏れ（気密瑕疵）を判別することを排除しない。   In the second inspection step, for example, the control valve 24 is slightly inclined in the internal space of the vent plug V, even if the valve body 28 is not airtight, and the valve of the control valve 24 When a gap is generated between the case 27 and the inner wall of the vent plug V and a minute leak (airtight flaw) is generated, it is not excluded to determine the minute leak (airtight flaw).

上記の通り、本発明に係る検査方法によれば、上記第一検査工程で圧送空気が基準気圧に達しない過大漏れ（気密瑕疵）を生じている弁体２８を有するベントプラグＶを判別すると共に、上記第二検査工程で上記第一検査工程において基準気圧に達したが微小漏れ（気密瑕疵）を生じている弁体２８を有するベントプラグＶを判別し、過大漏れと微小漏れの双方の気密瑕疵を的確に判別して真に正常なベントプラグＶのみを使用に供することができる。   As described above, according to the inspection method according to the present invention, the vent plug V having the valve body 28 that causes the excessive leakage (airtight soot) that the pumped air does not reach the reference atmospheric pressure in the first inspection step is determined. In the second inspection step, the vent plug V having the valve body 28 that has reached the reference pressure in the first inspection step but has a minute leak (airtight flaw) is discriminated, and airtightness of both excessive leakage and minute leakage is detected. By accurately discriminating the wrinkles, only the normal normal vent plug V can be used.

尚上記第一検査工程における「空気圧送開始からの所定時間」や「基準気圧」、第二工程における「空気圧送停止からの所定時間」や「基準差圧」は気密空間Ｓの容量や時間当たりの空気圧送量等により適宜選択できる。   The “predetermined time from the start of pneumatic feeding” and the “reference pressure” in the first inspection step, and the “predetermined time from the stop of pneumatic feeding” and the “reference differential pressure” in the second step are per volume and time of the airtight space S. The pressure can be appropriately selected depending on the pneumatic feed amount.

ここで、本発明に係る検査方法で使用する検査装置について説明する。該検査装置は、図８に示すように、基本構造として、その中心に９０度ずつ回転するターンテーブル７を設け、該ターンテーブル７上に等間隔を置いて４つの検査台８を配置すると共に、該各検査台８に対応する位置に、それぞれ、セット部９・検査部１０・不良品回収部１１及び良品回収部１２を備え、各検査台８がセット部９から検査部１０、不良品回収部１１、良品回収部１２へと順に移動し、再度セット部９に戻る動作を繰り返す構成と成っている。   Here, an inspection apparatus used in the inspection method according to the present invention will be described. As shown in FIG. 8, the inspection apparatus has a turntable 7 that rotates 90 degrees at the center as a basic structure, and four inspection tables 8 are arranged on the turntable 7 at equal intervals. In addition, a set unit 9, an inspection unit 10, a defective product collection unit 11 and a non-defective product collection unit 12 are provided at positions corresponding to the inspection tables 8, respectively. The configuration is such that the operation of moving sequentially to the collection unit 11 and the non-defective product collection unit 12 and returning to the set unit 9 is repeated.

尚図中２０は判別装置であり、該判別装置２０は後述する検査部１０における上記第一・第二検査工程で検出された気圧又は基準気圧との差圧に基づき弁体２８の気密瑕疵の有無を判別し、弁体２８の気密瑕疵を有するベントプラグＶを回収するよう不良品回収部１１に信号を発信するものである。   In the figure, reference numeral 20 denotes a discriminating device, which discriminates the airtight flaw of the valve element 28 on the basis of the pressure difference detected from the atmospheric pressure or the reference atmospheric pressure detected in the first and second inspection steps in the inspection unit 10 described later. The presence / absence is determined, and a signal is transmitted to the defective product collection unit 11 so as to collect the vent plug V having the airtight fistula of the valve body 28.

上記検査台８には検査対象のベントプラグＶをセットする４つのセット孔８ａが穿設されおり、該セット孔８ａは上記ベントプラグＶの軸部２２と略同径を呈し、上記検査台８及びターンテーブル７を貫通して該ターンテーブル７の下部空間と連通している。従って、上記セット部９で上記検査台８のセット孔８ａに検査対象のベントプラグＶをセットすると、図９に示すように、各ベントプラグＶの軸部２２下端はターンテーブル７の下部空間に露出することとなる。尚上記セット孔８ａは４つに限らず、実施に応じその数を増減することも任意である。   The inspection table 8 has four set holes 8a for setting the vent plug V to be inspected. The set holes 8a have substantially the same diameter as the shaft portion 22 of the vent plug V, and the inspection table 8 In addition, the turntable 7 passes through and communicates with the lower space of the turntable 7. Therefore, when the vent plug V to be inspected is set in the set hole 8a of the inspection table 8 by the setting portion 9, the lower end of the shaft portion 22 of each vent plug V is placed in the lower space of the turntable 7, as shown in FIG. It will be exposed. The number of the set holes 8a is not limited to four, and the number of the set holes 8a can be increased or decreased depending on the implementation.

次に、上記検査部１０について説明する。検査部１０は、図１０に示すように、上記検査台８にセットされた各ベントプラグＶに対応する４つの検査ヘッド１を備え、各検査ヘッド１が昇降装置１３により昇降動する構成となっている。尚上述したように、各検査ヘッド１にはシール部材２が設けられると共に、コンプレッサー３により圧送された空気を圧送するエアチューブ４が接続されている。又具体的には図示しないが該エアチューブ４には気圧を測定する測定器５が接続されている。   Next, the inspection unit 10 will be described. As shown in FIG. 10, the inspection unit 10 includes four inspection heads 1 corresponding to the vent plugs V set on the inspection table 8, and the inspection heads 1 are moved up and down by the lifting device 13. ing. As described above, each inspection head 1 is provided with the seal member 2 and is connected with the air tube 4 for pumping the air pumped by the compressor 3. Although not specifically shown, the air tube 4 is connected to a measuring instrument 5 for measuring the atmospheric pressure.

上記昇降装置１３はエアシリンダー１４により昇降動するシリンダーロッド１５と、該シリンダーロッド１５の下端に取り付けられる可動板１６と、該可動板１６に対して上下動可能に配設され上記各検査ヘッド１を保持する保持ロッド１７とを備える構成となっている。又上記各保持ロッド１７にはスプリング１８が設けられ検査ヘッド１をベントプラグＶ側（下側）に弾性付勢している。   The lifting device 13 is provided with a cylinder rod 15 that is moved up and down by an air cylinder 14, a movable plate 16 attached to the lower end of the cylinder rod 15, and a movable plate 16 that can be moved up and down. It is the structure provided with the holding rod 17 which hold | maintains. Each holding rod 17 is provided with a spring 18 to elastically bias the inspection head 1 toward the vent plug V (downward).

上記検査部１０で本発明に係る検査方法の上記第一検査工程及び第二検査工程を行う。即ち、図１１に示すように、上記エアシリンダー１４により上記シリンダーロッド１５を降動させて上記可動板１６と共に各保持ロッド１７で保持された検査ヘッド１を各ベントプラグＶの頭部２１にシール部材２を介して加圧密着し上記気密空間Ｓを画成する。この際に、上記各保持ロッド１７に設けられたスプリング１８が各ベントプラグＶのセット状態による高さのバラツキを吸収すると共に、各検査ヘッド１のベントプラグＶの頭部２１に対する加圧密着を促すこととなる。   The inspection unit 10 performs the first inspection step and the second inspection step of the inspection method according to the present invention. That is, as shown in FIG. 11, the cylinder rod 15 is moved down by the air cylinder 14, and the inspection head 1 held by the holding rod 17 together with the movable plate 16 is sealed to the head 21 of each vent plug V. The airtight space S is defined by press-contacting via the member 2. At this time, the springs 18 provided on the holding rods 17 absorb the variation in height due to the set state of the vent plugs V, and the pressure contact of the heads 21 of the vent plugs V of the inspection heads 1 is maintained. Will be encouraged.

そして、コンプレッサー３からエアチューブ４を通じて上記気密空間Ｓ内に空気を圧送し上記第一検査工程を行ない、又上記空気圧送を停止して上記第二検査工程を行うこととなる。該第一・第二検査工程終了後は上記エアシリンダー１４により上記シリンダーロッド１５を昇動させて上記可動板１６と共に各保持ロッド１７で保持された検査ヘッド１を各ベントプラグＶの頭部２１から離間せしめ、検査を終了する。   Then, air is pumped from the compressor 3 through the air tube 4 into the airtight space S to perform the first inspection step, and the pneumatic feeding is stopped to perform the second inspection step. After completion of the first and second inspection steps, the cylinder rod 15 is moved up by the air cylinder 14 and the inspection head 1 held by the holding rod 17 together with the movable plate 16 is moved to the head 21 of each vent plug V. The inspection is finished.

次に、上記不良品回収部１１について説明すると、不良品回収部１１は、図１２に示すように、ターンテーブル７の下部空間に各ベントプラグＶの下端を持ち上げる４つの第一リフト１８Ａと、該各第一リフト１８Ａで持ち上げられたベントプラグＶをエアブローにより吹き飛ばす第一ノズル１９Ａとを備える構成となっている。上記第一リフト１８Ａは上記判別装置２０からの信号により上記検査部１０での第一検査工程及び第二検査工程で弁体２８の気密瑕疵を有すると判断されたベントプラグＶのみを持ち上げ、図１３に示すように、対応する上記第一ノズル１９Ａで吹き飛ばして、不良品として回収箱等に回収する。   Next, the defective product collecting unit 11 will be described. The defective product collecting unit 11 includes four first lifts 18A for lifting the lower ends of the vent plugs V in the lower space of the turntable 7, as shown in FIG. The first nozzle 19A is configured to blow the vent plug V lifted by the first lifts 18A by air blow. The first lift 18A lifts only the vent plug V which is determined to have an airtight fistula of the valve body 28 in the first inspection process and the second inspection process in the inspection unit 10 based on a signal from the determination device 20. As shown in FIG. 13, it is blown off by the corresponding first nozzle 19A and collected as a defective product in a collection box or the like.

最後に、上記良品回収部１２について説明すると、良品回収部１２は、図１４に示すように、ターンテーブル７の下部空間に各ベントプラグＶの下端を持ち上げる４つの第二リフト１８Ｂと、該各第二リフト１８Ｂで持ち上げられたベントプラグＶをエアブローにより吹き飛ばす第二ノズル１９Ｂとを備える構成となっている。上記第二リフト１８Ｂは常に４つすべてが作動するが、弁体２８の気密瑕疵を有する不良品のベントプラグＶは既に上記不良品回収部１１で回収され良品のベントプラグＶのみが残存しているので、図１３に示すように、残存している当該良品のベントプラグＶを上記第二ノズル１９Ｂで吹き飛ばして、良品として回収箱等に回収する。   Finally, the non-defective product collecting unit 12 will be described. The non-defective product collecting unit 12 includes four second lifts 18B for lifting the lower ends of the vent plugs V in the lower space of the turntable 7, as shown in FIG. The vent plug V lifted by the second lift 18B is provided with a second nozzle 19B that blows off the air by air blow. Although all four of the second lifts 18B are always operated, the defective vent plug V having the airtight fistula of the valve element 28 has already been recovered by the defective product recovery unit 11 and only the good vent plug V remains. Therefore, as shown in FIG. 13, the remaining good vent plug V is blown off by the second nozzle 19 </ b> B and collected as a good product in a collection box or the like.

以上の検査装置により複数のベントプラグＶに対して自動で本発明に係る検査方法を実施することができる。   The inspection method according to the present invention can be automatically performed on the plurality of vent plugs V by the above inspection apparatus.

１ 検査ヘッド
２ シール部材
３ コンプレッサー
４ エアチューブ
５ 測定器
６ 圧送孔
７ ターンテーブル
８ 検査台
８ａ セット孔
９ セット部
１０ 検査部
１１ 不良品回収部
１２ 良品回収部
１３ 昇降装置
１４ エアシリンダー
１５ シリンダーロッド
１６ 可動板
１７ 保持ロッド
１８Ａ 第一リフト
１８Ｂ 第二リフト
１９Ａ 第一ノズル
１９Ｂ 第二ノズル
２０ 判別装置
２１ 頭部
２１ａ 操作溝
２２ 軸部
２３ 排気孔
２４ 制御弁
２５ 通気孔
２６ 弁座
２７ 弁ケース
２８ 弁体
２９ 弾性体
３０ 押さえ板
３０ａ 通気口
Ｖ ベントプラグ
Ｓ 気密空間
Ｄ 微細異物 DESCRIPTION OF SYMBOLS 1 Inspection head 2 Seal member 3 Compressor 4 Air tube 5 Measuring device 6 Pressure feed hole 7 Turntable 8 Inspection stand 8a Set hole 9 Set part 10 Inspection part 11 Defective product collection part 12 Good product collection part 13 Lifting device 14 Air cylinder 15 Cylinder rod DESCRIPTION OF SYMBOLS 16 Movable plate 17 Holding rod 18A 1st lift 18B 2nd lift 19A 1st nozzle 19B 2nd nozzle 20 Discriminating device 21 Head 21a Operation groove 22 Shaft part 23 Exhaust hole 24 Control valve 25 Vent hole 26 Valve seat 27 Valve case 28 Valve body 29 Elastic body 30 Holding plate 30a Ventilation hole V Vent plug S Airtight space D Fine foreign matter

要述すると、検査対象のベントプラグをセットする複数のセット孔が穿設された検査台と、該検査台にセットされた各ベントプラグに対応する複数の検査ヘッドと、該複数の検査ヘッドを昇降動させる昇降装置とを備え、上記検査ヘッドは空気を圧送するエアチューブが接続されると共にベントプラグの頭部に加圧密着するシール部材を有し、上記昇降装置はエアシリンダーにより昇降動するシリンダーロッドと、該シリンダーロッドの下端に取り付けられる可動板と、該可動板に対して上下動可能に配設され上記各検査ヘッドを保持する保持ロッドと、該保持ロッドに設けられ検査ヘッドをベントプラグの頭部側に弾性付勢するスプリングとを有する検査装置を用意し、上記エアシリンダーにより上記シリンダーロッドを降動させて上記可動板と共に各保持ロッドで保持された検査ヘッドを降動させ、該検査ヘッドを上記検査台にセットされた各ベントプラグの頭部に上記シール部材を介して加圧密着して該ベントプラグの排気孔を覆う気密空間を画成し、該気密空間に上記エアチューブを通じて空気を圧送することにより上記ベントプラグの排気孔を圧送孔として使用して空気を圧送し、該圧送された空気が基準気圧に達するか否かを検出して過大漏れ（所定時間空気を圧送しても基準気圧に達しない弁体即ちベントプラグの気密瑕疵）を判別する第一検査工程を具備すると共に、上記排気孔を通じての空気圧送を停止し、該停止から一定時間経過後の気圧と上記基準気圧との差圧を検出して微小漏れ（上記第一検査工程で基準気圧に達したが微小漏れを生じている弁体即ちベントプラグの気密瑕疵）を判別する第二検査工程を具備する。
In short, an inspection table having a plurality of set holes for setting a vent plug to be inspected, a plurality of inspection heads corresponding to each vent plug set in the inspection table, and the plurality of inspection heads. A lifting device that moves up and down, and the inspection head is connected to an air tube that pumps air and has a sealing member that pressurizes and adheres to the head of the vent plug, and the lifting device moves up and down by an air cylinder. A cylinder rod; a movable plate attached to the lower end of the cylinder rod; a holding rod which is arranged to be movable up and down with respect to the movable plate; and holds the inspection heads; and vents the inspection head provided on the holding rod. An inspection device having a spring that elastically biases the head of the plug is prepared, and the cylinder rod is lowered by the air cylinder to allow the above-mentioned possibility. The inspection head held by each holding rod together with the plate is moved down, and the inspection head is pressed and adhered to the head of each vent plug set on the inspection table via the seal member to exhaust the vent plug. An airtight space that covers the hole is defined, and air is pumped into the airtight space through the air tube so that the air is pumped using the vent hole of the vent plug as a pumping hole. And a first inspection step for determining whether excessive leakage (a valve body that does not reach the reference atmospheric pressure even if air is pumped for a predetermined time, that is, an airtight flaw of a vent plug) is provided, The air pressure supply is stopped, and the differential pressure between the reference pressure and the atmospheric pressure after a lapse of a certain time since the stop is detected to detect a minute leak (the valve that has reached the reference pressure in the first inspection step but has a minute leak) Body Comprising a second inspection step of determining the airtightness defect) of plugging.

Claims (1)

下記のＡ乃至Ｃの構成を備える車載バッテリー用ベントプラグの検査方法。
Ａ：車載バッテリー内部で発生したガスを通気する通気孔と、該通気孔から流入したガスを外部に排気する排気孔と、上記通気孔を形成する弁座の上記排気孔側表面に加圧密着して該通気孔を閉鎖する弁体とを備え、車載バッテリー内部のガス圧が高まると当該ガス圧により上記弁体が上記通気孔を開放し上記排気孔からのガス排気を許容する車載バッテリー用ベントプラグの検査方法において、
Ｂ：上記ベントプラグの排気孔を圧送孔として使用して空気を圧送し、該圧送された空気が基準気圧に達するか否かを検出して弁体の気密瑕疵を判別する第一検査工程と、
Ｃ：上記排気孔を通じての空気圧送を停止し、該停止から一定時間経過後の気圧と上記基準気圧との差圧を検出して弁体の気密瑕疵を判別する第二検査工程とを具備する。 An inspection method for an in-vehicle battery vent plug having the following configurations A to C.
A: A vent hole for venting the gas generated inside the vehicle-mounted battery, an exhaust hole for exhausting the gas flowing in from the vent hole to the outside, and pressure contact with the exhaust hole side surface of the valve seat forming the vent hole And a valve body that closes the vent hole, and when the gas pressure inside the in-vehicle battery increases, the valve body opens the vent hole by the gas pressure and allows gas exhaust from the exhaust hole. In the inspection method of the vent plug,
B: a first inspection step in which air is pumped by using the vent hole of the vent plug as a pumping hole, and whether or not the pumped air reaches a reference pressure to determine an airtight flaw of the valve body; ,
C: a second inspection step of stopping air pressure feeding through the exhaust hole and detecting a pressure difference between the reference pressure and a pressure after a lapse of a certain time from the stop to determine an airtight fouling of the valve body. .
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