JP3953345B2

JP3953345B2 - Gas combustion equipment

Info

Publication number: JP3953345B2
Application number: JP2002078701A
Authority: JP
Inventors: 憲治加藤
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 2002-03-20
Filing date: 2002-03-20
Publication date: 2007-08-08
Anticipated expiration: 2022-03-20
Also published as: TWI263759B; TW200304536A; KR100546934B1; JP2003279037A; KR20030076247A

Description

【０００１】
【発明の属する技術分野】
本発明は、ガスコック内の安全弁を作動させる炎検知手段をバーナ本体の近傍に配置したガス燃焼装置に関する。より詳細には、本発明は、炎検知手段を所定の位置により確実に配置して、安全弁の誤作動を防止するガス燃焼装置に関する。
【０００２】
【従来の技術】
ガス燃焼装置において、バーナ本体近傍に配置される炎検知手段の１つであるサーモカップル（ＴＣ）の取付構造については、従来から数多く提案されている。例えば、特開平１１−２６４５４４号公報には、ＴＣの上部が挿通する差込孔をバーナ本体に穿孔し、別途取付金具の取付部に設けられた挿通孔にＴＣを挿通させ、挿通孔の孔縁から切り起こした弾性突片をＴＣ下部の外面に弾接させたＴＣの取付構造が開示されている。これと類似したＴＣの取付構造も、特開２０００−２８３４１４号公報に開示されている。しかし、これらの取付構造では、バーナ本体に差込孔が穿孔されており、その製造コストが高くつく。しかも、ＴＣの取付作業時には、ＴＣを取付金具の下方から挿通させなければならず、取付作業性に優れているとはいい難い。
また、特開平８−１３５９６５号公報には、ＴＣの保持具にＵ状の切り欠き部を有する上片及び下片を設け、下片の一側部にＴＣに周設したスリット溝の幅寸法に等しい段差をもたせて下片をスリット溝に内接させ、止め具でＴＣを保持具に係止させたＴＣの取付装置が開示されている。しかし、この取付装置では、上記段差寸法の精密さが要求され、段差を形成する際の保持具の加工時に段差寸法にバラツキが生じると、ＴＣの先端が所定の位置から段差側に傾きやすいという問題がある。
【０００３】
一方、本出願人は、ガスバーナの燃焼炎の有無を検知して安全装置を作動させるガス燃焼装置において、図５及び図６に示すような炎検知手段の取付構造を採用してきた。ここで、図５はバーナキャップが載置されたガスバーナ本体に炎検知手段を配置した時の平面図であり、図６はバーナ本体をその取付枠に固定した時の図５の断面図である。
図５，６について簡単に説明すると、ａはバーナ本体であり、空気混合管ｂが一体に形成されている。バーナ本体ａ上にはバーナキャプｃが載置される。ｄは炎検知手段であり、その下部に位置決め用溝ｅが形成されている。炎検知手段ｄはコードｆを介して電磁安全弁を内蔵したガスコックに接続する。ｇは水平部と傾斜部とからなる炎検知手段の固定用取付金具であり、水平部と傾斜部とは所定の角度θで折曲している。取付金具ｇの傾斜部の上部及び下部には一対の挟持片ｈ，ｉが設けられ、その中間の両側縁に一対の係止片ｊを設けている。上記溝ｅは挟持片ｉで挟持され、係止片ｊに係止する押圧部材ｋによって炎検知手段ｄは取付金具ｇに固定される。
【０００４】
【発明が解決しようとする課題】
以上のように、図５，６に図示する従来の炎検知手段の取付構造にあっては、炎検知手段の位置決めは取付金具のなす折曲角θで規制されていた。そのため、炎検知手段の固定用取付金具を製造する際の曲げ加工時における折曲角θのバラツキにより、場合によっては更に取付金具が固着される部材、具体的にはバーナ本体固着用取付枠の加工時の寸法のバラツキにより、バーナ本体に対する炎検知手段の取付位置にバラツキが生じるという問題が発生していた。炎検知手段が所定の位置に固定されなかったガス燃焼装置は、ガスコックの安全弁が正常に作動しないことになるので、不良品として取り扱われ、ガス燃焼装置の歩留まりの低下を招く。
そこで、本発明の目的は、上述の従来技術の問題点を解消することにあり、ガス燃焼装置に配置される炎検知手段の固定用取付金具やこれが固着される部材について、高度の寸法精度を必要とすることがなく、簡単な組付操作で炎検知手段を所定の位置に確実に固定することができ、延いては製品の歩留まりの向上を図ろうとするものである。
【０００５】
【課題を解決するための手段】
本発明者は、上述の問題点を解決すべく鋭意検討を重ねてきたところ、炎検知手段を固定する取付金具にバーナ本体側に折曲させた爪片を設けて、この爪片の先端をバーナ本体の外周壁に当接させ、取付金具が、バーナ本体に固定される前の水平部に対する傾斜部のなす角がバーナ本体へ固定された後の該なす角より小さく設定されていることにより、取付金具をバーナ本体に固定した際、該爪片の先端がバーナ本体の外周壁に押し当てられた状態で当接し、爪片が一対の片からなり、バーナ本体は外周壁が円筒状で、２つの爪片の先端面がバーナ本体の外周壁に点接触していることによって、本発明の課題を解決するに至ったものである。
【０００６】
即ち、本発明は、水平部と該水平部からバーナ本体側に上方に折曲した傾斜部とからなる取付金具に、炎検知手段をその上部が傾斜部から突出した状態で取付け、該取付金具をバーナ本体に固定したガス燃焼装置において、傾斜部に関してバーナ本体側に折曲した爪片が取付金具の傾斜部に設けられており、前記取付金具は、バーナ本体に固定される前の水平部に対する傾斜部のなす角が、バーナ本体へ固定された後の該なす角より小さく設定されていることにより、取付金具をバーナ本体に固定した際、該爪片の先端がバーナ本体の外周壁に押し当てられた状態で当接し、前記爪片が一対の片からなり、前記バーナ本体は外周壁が円筒状で、前記２つの爪片の先端面がバーナ本体の外周壁に点接触していることを特徴とする。
【０００７】
【作用】
本発明（請求項１に係る発明）によれば、上述の通り、炎検知手段が固定される取付金具に爪片を設けて、その先端をバーナ本体の外周壁に当接させ、前記取付金具は、バーナ本体に固定される前の水平部に対する傾斜部のなす角が、バーナ本体へ固定された後の該なす角より小さく設定されていることにより、取付金具をバーナ本体に固着した際、該爪片の先端がバーナ本体の外周壁に押し当てられた状態で当接するものであるから、爪片の先端がバーナ本体の外周壁に密着した状態で、炎検知手段の上端部（感熱部）の位置が設定される。従って、炎検知手段の感熱部の配設位置は主として爪片の長さによって規制されるので、単に取付金具の水平部と傾斜部とのなす角度θに依存する従来の炎検知手段の位置決め手段と比較して、上記角度θが加工時に多少ばらついても、バーナ本体に対する炎検知手段の設置位置がさほどばらつかず安定し、しかも、バーナ本体は外周壁が円筒状で、爪片が一対の片からなるので、２つの爪片の先端面がバーナ本体の円筒状の外周壁に２箇所でスムーズに点接触し、取付金具がバーナ本体の外周壁に安定して固定され、バーナ本体に対する炎検知手段の設置位置がさらに安定する。
【０００８】
【発明の実施の形態】
以下、本発明について詳細に説明する。
本発明のガス燃焼装置において、炎検知手段（以下、炎検知器という）としては、炎を検知できる手段であれば特に限定されるものではないが、例えばサーモカップルやフレームロッド、熱電対等が用いられる。炎検知器が固定される取付金具については、次に述べるような構造の第一及び第二の取付金具等が挙げられる。
第一の取付金具は、水平部とバーナ本体側の上方に折曲した傾斜部とからなる。傾斜部には、炎検知器の胴部を挟持する一対の挟持片及び炎検知器の位置決めのための突起が設けられる。また、線状または板状の押圧部材によって炎検知器の胴部を傾斜部上に押圧するための一対の係止片を設けることが好ましい。傾斜部には、先端がバーナ本体の外周壁に当接する爪片が更に設けられる。
挟持片は、傾斜部に関してバーナ本体と反対側に直角に折曲していて、垂直方向に扁平である。炎検知器をより安定に固定するには、挟持片の上方または下方に更に別の挟持片を傾斜部に設けることが好ましい。この別の挟持片は、一対の片からなり、傾斜部に関してバーナ本体と反対側に直角に折曲していて、水平方向に扁平である。突起は、傾斜部に関してバーナ本体と反対側に僅かに突出している。この突起は、炎検知器の胴部外周に形成された感熱部の位置決め用溝に係合して、炎検知器を傾斜部上に係止する。取付金具は１枚の板金から製作することが好ましいので、その場合は、傾斜部に切り欠き部が形成され、この切り欠き部の両側縁に挟持片が設けられ、欠き部の下端縁に突起が設けられる。また、係止片は、傾斜部に関してバーナ本体と反対側に直角に折曲していて、垂直方向に扁平である。押圧部材で炎検知器を傾斜部上に押圧するためには、係止片は例えば逆Ｌ形状をなす屈曲部を有し、押圧部材の両端部を屈曲部に係止させることが好ましい。
【０００９】
爪片は、傾斜部に関してバーナ本体側に折曲していて、水平方向に扁平である。この爪片は、傾斜部からバーナ本体の外周壁の当接位置までの距離が必要以上に長くならないように、取付金具の水平部と実質的に平行に設けることが好ましい。同様の理由から、爪片を傾斜部の上部に設けることも好ましく、傾斜部の上端縁に設けることが特に好ましい。このような爪片は、１つまたは複数設けることができる。
また、爪片の先端面を外周壁の形状に一致またはほぼ一致させることが好ましい。例えば、バーナ本体の外周壁が円筒状であれば、爪片の先端面を凹状に湾曲させることになる。このように両者の形状を一致させると、爪片がバーナ本体の外周壁にスムーズに接触し、しかも、爪片の先端と外周壁との接触面が広くとれるので、取付金具をバーナ本体に容易に安定して固定することができる。なお、爪片を複数設ける場合は、各爪片の先端面をバーナ本体の外周壁と点接触させることが好ましい。更に、バーナ本体の外周壁の周方向に例えば凹部が形成されていても、この凹部内に爪片の先端面を当接させることが容易に可能である。
前記挟持片及び係止片の各一対の片や爪片を複数設ける場合は、傾斜部の高さ方向中心線に対称に配設され、突起及び爪片を１つ設ける場合は、上記中心線上に配設される。また、水平部の両側縁には、下方に垂直に折曲した一対の脚片が設けられ、この脚片はバーナ本体を固着する取付枠に固定される。
【００１０】
第二の取付金具は、第一の取付金具と同様に、水平部とバーナ本体側の上方に折曲した傾斜部とからなる。傾斜部には、炎検知器の胴部を挟持する一対の挟持片が設けられ、また、前述の係止片を設けることが好ましい。傾斜部には、先端がバーナ本体の外周壁に当接する爪片が更に設けられる。
一対の挟持片は傾斜部の上部及び下部に設けられる。上部及び下部挟持片は、傾斜部に関してバーナ本体と反対側に直角に折曲していて、水平方向に扁平である。より正確には、挟持片は傾斜部に直角に折曲しているため上向きに設けられる。また、係止片は通常上部及び下部挟持片の中間に設けられる。爪片は、傾斜部に関してバーナ本体側に折曲していて、垂直方向に扁平である。前述と同様の理由により、爪片を取付金具の水平部と実質的に平行に、また、傾斜部の上部、特にその上端縁に設けることが好ましい。更に、バーナ本体の外周壁にスムーズに接触するように、対をなす爪片の先端面を凸状に湾曲させて、外周壁に２点接触で当接させることが好ましい。一対の爪片の各片を傾斜部の両側縁に設けて、その間隔を広くした上記２点接触を採用すると、特に炎検知器の設置位置が安定したものとなる。
前記挟持片、係止片及び爪片の各片は、傾斜部の高さ方向中心線に対称または中心線上に配設される。また、水平部の両側縁に前述の脚片が設けられる。
【００１１】
取付金具（脚片）を最終的にバーナ本体の取付枠に固定した時、水平部に対する傾斜部の角度は一般に５０〜７０°の範囲にあり、５５〜６５°の範囲にあることが好ましい。上記角度が５０〜７０°の範囲にあれば、市販のガス燃焼装置において、炎検知器の感熱部の位置がバーナ本体の外周壁に近接しすぎたり離間しすぎたりすることがなく、炎検知器を最適の位置に取り付けることが可能である。なお、炎検知器の最適位置とは、バーナを弱火燃焼とした時に、燃焼炎のバーナ本体と反対側の外縁に炎検知器の感熱部が配置されることをいう。
【００１２】
炎検知器は、ペンシル状の胴部外周に感熱部の位置決め用溝が形成される。取付金具への炎検知器の装着は、位置決め用溝を第一取付金具の突起あるいは第二取付金具の挟持片の少なくとも一方の一対の片間に係止させて、炎検知器をバーナ本体側に押し込みながら取付金具の傾斜部に炎検知器の胴部を当接させた後、前記押圧部材の両端部を係止片に係止させるだけの操作でよい。即ち、バーナ本体とは反対側からの単純な押し込み及び係止片への押圧部材の係止操作によって、炎検知器を取付金具の傾斜部上に固定することができる。上部及び下部の一方の挟持片で位置決め用溝を係止する場合は、他方の一対の挟持片は位置決め用溝と離間した位置の炎検知器胴部を挟持する。炎検知器が取付金具に固定されると、炎検知器の上部（感熱部）が傾斜部から突出した状態にある。
第二の取付金具において、位置決め用溝を炎検知器胴部の下部に形成して下部挟持片で挟持することが好ましいが、上部挟持片で挟持したり、あるいは位置決め用溝を２つ形成して上部及び下部挟持片で挟持してもよい。また、一対の挟持片が係合する箇所に位置決め用溝を形成しておけば足り、必ずしも炎検知器胴部の全周に溝を刻設する必要はない。更に、円弧状に湾曲した押圧部材が嵌合または遊嵌する溝を炎検知器の胴部に形成しておくことも好ましい。
【００１３】
炎検知器が装着された取付金具をバーナ本体固着用取付枠に固定するには、まず、バーナ本体側の水平部の先端部をバーナ本体裏面と取付枠の上面との間の隙間に挿入すると共に、取付枠の上面に形成された一対のスリットに取付金具の脚片を挿入する。次に、一対の爪片がバーナ本体の外周壁に当接するまで取付金具を押し込む。この爪片を当接させた状態で、バーナ本体を取付枠に例えばビス締めすることにより、取付枠への取付金具の固定が行われる。上記隙間及びスリットは、それぞれ水平部及び脚片の板厚より僅かに広い程度に設定される。また、スリットは、取付枠に対する取付金具の位置決めを兼ねている。
ここで、取付金具がバーナ本体の取付枠に固定される前は、水平部に対する傾斜部のなす傾斜角が、前述の最終的な角度より１〜５°、好ましくは２〜４°ほど小さく設定されている。このように、加工時の上記傾斜角が最終的な角度より予め小さく設定された取付金具を用い、爪片をバーナ本体の外周壁に押し当てた状態でバーナ本体をその取付枠に固着すると、傾斜角が僅かながら押し広げられ、前述した最終的な傾斜角に調整される。
本発明においては、炎検知器の感熱部の配設位置が専ら爪片の長さにより規制されるので、取付金具の製造過程で上記傾斜角に多少のバラツキがあっても、更に固着前のバーナ本体裏面とその取付枠の上面との間隔に多少のバラツキがあっても、バーナ本体と炎検知器との位置関係は所定のものと殆ど変わらないことになる。なお、取付金具をバーナ本体固着用取付枠に固定した後に、前述の手順で炎検知器を取付金具に装着しても、上記位置関係は殆ど変化しない。
【００１４】
本発明における第二の取付金具は、例えばプレス加工によって、１枚の板金から製造することができる。具体的には、傾斜部の下部、場合によっては傾斜部の下部から水平部に跨って切り欠け部が形成される。この切り欠け部の上端縁からその内部に延出する曲げ加工前の下部挟持片が形成される。
取付金具を製造するには、まず、板金を裁断して、平坦に連続した水平部及び傾斜部と共に上記切り欠け部を形成する。その際、前述の各一対の爪片、上部挟持片及び係止片を傾斜部周縁の外側に残し、一対の脚片を水平部の両側に残す。爪片は、傾斜部の上部両側縁に形成され、水平部と平行に折り曲げる場合はやや上向きに形成される。上部挟持片は、傾斜部の上端部から上側に形成される。また、係止片は傾斜部の両側縁に形成される。なお、傾斜部の両側縁の外側に形成される爪片及び係止片の幅は、水平部の両側縁の外側に形成される脚片の幅より短くすることが好ましい。ここでいう幅とは、各一対の片の先端間の距離を意味する。
裁断された板金は、その後各片を前述した方向に曲げ加工することにより、第二の取付金具が製造される。
第一の取付金具も、上述の方法に準拠して１枚の板金から製造できることは、上述の説明から明らかであろう。
【００１５】
次に、図面を参照しながら本発明を具体的に説明する。
図１(Ａ)において、符号１ａは第一のサーモカップル固定用取付金具であり、水平部２及び傾斜部３を有する。傾斜部３は、水平部２と５８°の傾斜角でバーナ本体側に上方に折曲している。また、傾斜部３の略中央部には切り欠け部４ａが形成される。水平部２の両側縁には、下方垂直に折曲した一対の脚片５が設けられる。
傾斜部３の切り欠け部４ａには、突起６ａ及び一対の縦長の挟持片６ｂが、それぞれ下端縁中央及び両側縁に設けられる。また、傾斜部３には、両側縁に一対の係止片７、上端縁に一対の横長の挟持片８、及び上端縁中央に爪片９ａが、それぞれ設けられる。これらの一対の各片（６ｂ，７，８）は、傾斜部３の高さ方向中心線に対称に配設される。
突起６ａはバーナ本体と反対側に突出する。縦長の挟持片６ｂ、垂直方向に扁平な係止片７及び横長の挟持片８は、バーナ本体と反対側に傾斜部３と直角に折曲する。係止片７の形状は逆Ｌ形状をなす。水平方向に扁平な爪片９ａは、バーナ本体側に折曲していて、水平部２と平行である。また、爪片９ａの先端面は、バーナ本体の外周壁の形状に合致するように凹状に湾曲している。
【００１６】
図１(Ｂ)は第二のサーモカップル固定用取付金具を示し、第一の固定用取付金具と同様の機能を有する部材には図１(Ｂ)に同一の番号を付す。
サーモカップル固定用取付金具１ｂは水平部２及び傾斜部３を有する。傾斜部３は、水平部２と同一幅の下部、下部より幅の狭い中間部及び中間部より幅の狭い上部からなり、水平部２と５８°の傾斜角でバーナ本体１０側に上方に折曲している（図３参照）。また、取付金具１ｂには、傾斜部３の下部から水平部２の一部に跨って切り欠け部４ｂが形成される。水平部２の両側縁には、下方垂直に折曲した一対の脚片５が設けられる。この脚片５は、大略矩形状の片からなり、バーナ本体と反対側の折曲部分が切り欠かれ、同じ反対側の下部の角部が切り欠かれて台形をなしている。
傾斜部３には、下部に形成された切り欠け部４ｂの上端縁に一対の下部挟持片６、中間部の両側縁に一対の係止片７、上部の上端縁に一対の上部挟持片８、及び上部の上端部両側縁に一対の爪片９ｂが、それぞれ設けられる。これらの一対の各片（５〜９ｂ）は、傾斜部３の高さ方向中心線に対称に配設される。
水平方向に扁平な下部及び上部挟持片６，８は、バーナ本体と反対側に傾斜部３と直角に折曲する。垂直方向に扁平な係止片７は、バーナ本体と反対側に傾斜部３と直角に折曲し、その形状は逆Ｌ形状をなす。垂直方向に扁平な爪片９ｂは、バーナ本体側に傾斜部３と直角に折曲し、その上端面が水平部２と平行である。また、爪片９ｂの先端面は円弧状に凸曲している。
【００１７】
図２，３は一例としてバーナキャップが載置されたガス調理器具のこんろ用バーナ本体に図１(Ｂ)に図示する取付金具１ｂを取り付けた状態を示し、図４はバーナ本体をその取付枠に固着した状態を示している。
図２〜図４において、符号１０はガス燃焼装置のバーナ本体であり、空気混合管１１と、環状のバーナヘッド１２と、平坦な鍔部１３とから構成される。バーナ本体１０は、２枚の金属板の外周縁をかしめ合わせることにより形成される。空気混合管１１には、端部の内側に燃料ガスを供給するノズルが配設され、その端面に一次空気吸込口が形成される（図示せず）。
バーナヘッド１２上には、バーナキャップ１４が着脱自在に載置される。バーナキャップ１４の外周部裏面には多数の溝が設けられ、この溝とバーナヘッド１２に形成してある燃焼ガス流出口１５との間に多数の炎孔１６が形成される。更に、バーナヘッド１２の中央環状部上に、複数の中央炎孔１７からなる炎孔群が配置される。また、鍔部１３の先端角部にはビス孔１８，１８が穿設される。
一方、バーナ本体固着用取付枠１９は、開口部が下向きの断面コ字状の細長い部材で構成される。取付枠１９の両端には係合片２０が設けられ、これらの係合片２０はそれぞれガス調理器具のグリルボックス及び本体側板に形成された係止穴に係止される（図示せず）。図３には、グリルボックス側の係止穴に係止される係合片２０が図示されている。
【００１８】
符号２１は頂部に感熱部２２を備えたサーモカップルであり、下部に位置決め用溝２３が形成される。このサーモカップル２１の中間部にも、押圧部材２４が嵌入する溝が形成される。押圧部材２４は、両端に輪を備えた略半円状の剛性部材からなる。サーモカップル２１は電気コード２５を介して電磁安全弁を内蔵したガスコック（図示せず）に接続される。
サーモカップル２１を取付金具１ｂに装着するには、位置決め用溝２３を下部挟持片６の一対の片間に係止させて、サーモカップル２１をバーナ本体１０側に押し込み、サーモカップル２１の外面を取付金具１ｂの傾斜部３上に当接させる。その後、押圧部材２４を溝に嵌入し、押圧部材２４の両端部を係止片７に係止させると、サーモカップル２１が取付金具１ｂに固定される。
【００１９】
サーモカップル２１が固定された取付金具１ｂは、次のようにして、前記取付枠１９に固定される。
バーナ本体１０裏面と取付枠１９の上面間の水平部２の板厚より僅かに広い隙間に水平部２の先端部を、更に取付枠１９の上面板に形成され取付金具１ｂの位置決めを兼ねる一対のスリット（図示せず）に脚片５を、取付枠１９に関してバーナ本体１０とは反対側から斜め下方に向けて挿入する。取付枠１９の上面板にも前記鍔部１３に穿設されたビス孔１８，１８と対応する箇所にビス孔が形成されているが、このビス孔を形成する際に、ビス孔部分を切り起こして折り曲げ、これを上板に沿ってほぼ重合させることにより、上記隙間を確保している。
一対の脚片５をスリットに挿入すると、取付金具１ｂを上向きに起こしながら一対の爪片９ｂがバーナ本体１０の外周壁に当接するまで押し込み、爪片９ｂをバーナ本体１０に押し当てた状態で、ビス孔１８にビス２６を挿通してビス締めすることにより、バーナ本体１０が取付枠１９に固着される。このように、バーナ本体１０をその取付枠１９に固着すると、水平部２に対する傾斜部３の傾斜角が２°ほど押し広げられ、最終的に傾斜角が６０°となる。
【００２０】
【発明の効果】
本発明によれば、炎検知手段が固定される取付金具の傾斜部にバーナ本体側に折曲した爪片を設けて、その先端をバーナ本体の外周壁に当接させたものであり、爪片の先端がバーナ本体の外周壁に密着した状態で炎検知手段の炎検知部の配設位置が設定される。そのため、炎検知手段の位置は専ら爪片の長さによって規制されるので、バーナ本体に対する炎検知手段の固定位置が安定する。
その結果、加工過程で取付金具の水平部に対する傾斜部の傾斜角に多少のバラツキがあっても、炎検知部の設置位置に大きな影響はない。更に、固着前のバーナ本体裏面と取付枠の上面との間隔に多少の隙間があっても、バーナ本体と炎検知手段との位置関係は所定のものと殆ど変わらず、取付金具製造時における加工の自由度が大きくなる。従って、ガスコックの安全弁が正常に作動しないことに起因するガス燃焼装置の歩留まりが向上する。
【００２１】
また、一対の各爪片の先端がバーナ本体の外周壁に２箇所で接触し、バーナ本体に対する炎検知手段の設置位置がより容易に安定できる。また、爪片がバーナ本体の外周壁にスムーズに接触するという利点がある。
【図面の簡単な説明】
【図１】（Ａ）は本発明のガス燃焼装置に取り付けられる第一の炎検知手段の固定用取付金具の斜視図であり、（Ｂ）は同第二の炎検知手段の固定用取付金具の斜視図である。
【図２】バーナキャップを載置した本発明のガス燃焼装置のバーナ本体に第二の取付金具が取り付けられた状態を示す平面図である。
【図３】バーナ本体をその取付枠に固定した状態を示す図２の断面図である。
【図４】バーナ本体をその取付枠に固定した状態を示す平面図である。
【図５】バーナキャップを載置した従来のガスバーナ本体に炎検知手段が取り付けられた状態を示す平面図である。
【図６】バーナ本体をその取付枠に固定した状態を示す図５の断面図である。
【符号の説明】
１・・・取付金具、２・・・水平部、３・・・傾斜部、９・・・爪片、１０・・・バーナ本体、２１・・・炎検知手段。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas combustion apparatus in which flame detection means for operating a safety valve in a gas cock is arranged in the vicinity of a burner body. More specifically, the present invention relates to a gas combustion apparatus that securely disposes flame detection means at a predetermined position to prevent malfunction of a safety valve.
[0002]
[Prior art]
In the gas combustion apparatus, many mounting structures for a thermocouple (TC), which is one of flame detection means arranged near the burner body, have been proposed. For example, in Japanese Patent Application Laid-Open No. 11-264544, an insertion hole through which the upper part of TC is inserted is drilled in the burner body, and TC is inserted through an insertion hole provided in a mounting portion of the mounting bracket separately. There is disclosed a TC mounting structure in which an elastic protruding piece cut and raised from an edge is elastically contacted with an outer surface of a TC lower part. A similar TC mounting structure is also disclosed in Japanese Patent Laid-Open No. 2000-283414. However, in these mounting structures, the insertion hole is formed in the burner body, and the manufacturing cost is high. Moreover, at the time of the TC mounting operation, the TC must be inserted from below the mounting bracket, and it is difficult to say that the mounting workability is excellent.
Japanese Patent Application Laid-Open No. 8-135965 discloses a TC holder having an upper piece and a lower piece having a U-shaped notch, and a width dimension of a slit groove provided around one side of the lower piece. There is disclosed a TC attachment device in which a lower piece is inscribed in a slit groove with a step equal to, and the TC is locked to a holder with a stopper. However, in this attachment device, the precision of the step size is required, and if the step size varies when the holder is processed when forming the step, the tip of the TC tends to tilt from the predetermined position to the step side. There's a problem.
[0003]
On the other hand, the present applicant has adopted a flame detection means mounting structure as shown in FIGS. 5 and 6 in a gas combustion apparatus that activates a safety device by detecting the presence or absence of a combustion flame in a gas burner. Here, FIG. 5 is a plan view when the flame detection means is arranged on the gas burner body on which the burner cap is placed, and FIG. 6 is a cross-sectional view of FIG. 5 when the burner body is fixed to its mounting frame. .
5 and 6, a is a burner body, and an air mixing tube b is integrally formed. A burner cap c is placed on the burner body a. d is a flame detecting means, and a positioning groove e is formed in the lower part thereof. The flame detection means d is connected to a gas cock having a built-in electromagnetic safety valve through a cord f. Reference numeral g denotes a mounting bracket for fixing the flame detection means composed of a horizontal portion and an inclined portion, and the horizontal portion and the inclined portion are bent at a predetermined angle θ. A pair of clamping pieces h and i are provided on the upper and lower sides of the inclined portion of the mounting bracket g, and a pair of locking pieces j are provided on both side edges. The groove e is clamped by a clamping piece i, and the flame detection means d is fixed to the mounting bracket g by a pressing member k that is locked to the locking piece j.
[0004]
[Problems to be solved by the invention]
As described above, in the conventional flame detection means mounting structure shown in FIGS. 5 and 6, the positioning of the flame detection means is regulated by the bending angle θ formed by the mounting bracket. Therefore, due to variations in the bending angle θ during bending when manufacturing the fixing bracket for fixing the flame detection means, a member to which the mounting bracket is further fixed in some cases, specifically, the mounting frame for fixing the burner body Due to variations in dimensions during processing, there has been a problem that variations occur in the mounting position of the flame detection means with respect to the burner body. A gas combustion device in which the flame detection means is not fixed at a predetermined position will be handled as a defective product because the safety valve of the gas cock will not operate normally, leading to a decrease in the yield of the gas combustion device.
Accordingly, an object of the present invention is to eliminate the above-mentioned problems of the prior art, and to provide a high degree of dimensional accuracy with respect to the mounting bracket for fixing the flame detecting means arranged in the gas combustion apparatus and the member to which the fixing member is fixed. The flame detection means can be securely fixed at a predetermined position by a simple assembling operation without any necessity, and as a result, the product yield is improved.
[0005]
[Means for Solving the Problems]
The present inventor has conducted extensive studies to solve the above-described problems.As a result, a claw piece bent on the burner body side is provided on the mounting bracket for fixing the flame detection means, and the tip of the claw piece is attached to the mounting piece. By making contact with the outer peripheral wall of the burner body, and the mounting bracket is set so that the angle formed by the inclined part with respect to the horizontal part before being fixed to the burner body is smaller than the angle formed after being fixed to the burner body when fixing the mounting bracket to the burner body, abut in a state in which the leading end of the claw piece is pressed against the outer peripheral wall of the burner body, the claws are a pair of pieces, the burner body outer peripheral wall cylindrical Thus, since the tip surfaces of the two claw pieces are in point contact with the outer peripheral wall of the burner body, the problem of the present invention has been solved.
[0006]
That is, the present invention attaches a flame detecting means to a mounting bracket comprising a horizontal portion and an inclined portion bent upward from the horizontal portion toward the burner body, with the upper portion protruding from the inclined portion. In the gas combustion device in which the burner body is fixed, a claw piece bent toward the burner body side with respect to the inclined portion is provided on the inclined portion of the mounting bracket, and the mounting bracket is a horizontal portion before being fixed to the burner body. The angle formed by the inclined portion with respect to the burner body is set to be smaller than the angle formed after fixing to the burner body, so that when the mounting bracket is fixed to the burner body, the tip of the claw piece is placed on the outer peripheral wall of the burner body. abut while being pressed, made from the claw piece pair of piece, the burner body in the outer peripheral wall cylindrical, distal end surface of the two claws are in point contact with the peripheral wall of the burner body and said that you are.
[0007]
[Action]
According to the present invention (the invention according to claim 1), as described above, the mounting bracket to which the flame detecting means is fixed is provided with a claw piece, and the tip thereof is brought into contact with the outer peripheral wall of the burner body, and the mounting bracket The angle formed by the inclined portion with respect to the horizontal portion before being fixed to the burner body is set smaller than the angle formed after being fixed to the burner body, so that when the mounting bracket is fixed to the burner body, Since the tip of the claw piece comes into contact with the outer peripheral wall of the burner body, the upper end of the flame detection means (heat sensitive part) with the tip of the claw piece in close contact with the outer peripheral wall of the burner body. ) Position is set. Accordingly, since the position of the heat-sensitive portion of the flame detection means is mainly regulated by the length of the claw piece, the conventional flame detection means positioning means that simply depends on the angle θ formed by the horizontal portion and the inclined portion of the mounting bracket. Compared with the above, even if the angle θ varies somewhat during processing, the flame detector is not scattered in a stable position relative to the burner body , and the burner body has a cylindrical outer peripheral wall and a pair of claw pieces. Because it consists of a piece, the tip surfaces of the two claw pieces make smooth point contact with the cylindrical outer peripheral wall of the burner body at two locations, the mounting bracket is stably fixed to the outer peripheral wall of the burner body, and the flame against the burner body The installation position of the detection means is further stabilized .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
In the gas combustion apparatus of the present invention, the flame detection means (hereinafter referred to as a flame detector) is not particularly limited as long as it is a means capable of detecting a flame. For example, a thermocouple, a frame rod, a thermocouple, or the like is used. It is done. Examples of the mounting bracket to which the flame detector is fixed include first and second mounting brackets having the following structure.
The first mounting bracket includes a horizontal portion and an inclined portion bent upward on the burner body side. The inclined portion is provided with a pair of sandwiching pieces for sandwiching the body portion of the flame detector and a protrusion for positioning the flame detector. Moreover, it is preferable to provide a pair of locking pieces for pressing the body part of the flame detector onto the inclined part by a linear or plate-like pressing member. The inclined portion is further provided with a claw piece whose tip abuts against the outer peripheral wall of the burner body.
The sandwiching piece is bent at a right angle to the opposite side of the burner body with respect to the inclined portion, and is flat in the vertical direction. In order to fix the flame detector more stably, it is preferable to provide another sandwich piece on the inclined portion above or below the sandwich piece. This another clamping piece is composed of a pair of pieces, is bent at a right angle to the opposite side of the burner body with respect to the inclined portion, and is flat in the horizontal direction. The protrusion slightly protrudes on the opposite side of the burner body with respect to the inclined portion. This protrusion engages with the positioning groove of the heat sensitive part formed on the outer periphery of the body part of the flame detector, and locks the flame detector on the inclined part. Since the mounting bracket is preferably manufactured from a single sheet metal, in that case, notched portions are formed in the inclined portion, clamping pieces are provided on both side edges of the notched portion, and projections are formed on the lower end edge of the notched portion. Is provided. Further, the locking piece is bent at a right angle on the opposite side to the burner body with respect to the inclined portion, and is flat in the vertical direction. In order to press the flame detector onto the inclined portion with the pressing member, it is preferable that the locking piece has, for example, a bent portion having an inverted L shape, and both end portions of the pressing member are locked to the bent portion.
[0009]
The claw piece is bent toward the burner body with respect to the inclined portion, and is flat in the horizontal direction. This claw piece is preferably provided substantially parallel to the horizontal portion of the mounting bracket so that the distance from the inclined portion to the contact position of the outer peripheral wall of the burner body does not become longer than necessary. For the same reason, it is also preferable to provide the claw piece on the upper part of the inclined part, and particularly preferable to provide it on the upper edge of the inclined part. One or a plurality of such claw pieces can be provided.
Moreover, it is preferable to make the front end surface of the claw piece coincide with or substantially coincide with the shape of the outer peripheral wall. For example, if the outer peripheral wall of the burner body is cylindrical, the tip surface of the claw piece is curved in a concave shape. By matching both shapes in this way, the claw piece smoothly contacts the outer peripheral wall of the burner body, and the contact surface between the tip of the claw piece and the outer peripheral wall can be widened, so the mounting bracket can be easily attached to the burner body. Can be fixed stably. In addition, when providing two or more claw pieces, it is preferable to make the front end surface of each claw piece point-contact with the outer peripheral wall of a burner main body. Furthermore, even if, for example, a recess is formed in the circumferential direction of the outer peripheral wall of the burner body, it is possible to easily bring the tip surface of the claw piece into contact with the recess.
When a plurality of pairs of claw pieces and claw pieces are provided for each of the clamping pieces and the locking pieces, they are arranged symmetrically with respect to the center line in the height direction of the inclined portion, and when one protrusion and claw piece are provided, It is arranged. Further, a pair of leg pieces bent vertically downward are provided on both side edges of the horizontal portion, and the leg pieces are fixed to a mounting frame to which the burner body is fixed.
[0010]
Similar to the first mounting bracket, the second mounting bracket includes a horizontal portion and an inclined portion bent upward on the burner body side. The inclined portion is preferably provided with a pair of clamping pieces that clamp the body portion of the flame detector, and is preferably provided with the aforementioned locking pieces. The inclined portion is further provided with a claw piece whose tip abuts against the outer peripheral wall of the burner body.
The pair of clamping pieces are provided at the upper and lower portions of the inclined portion. The upper and lower clamping pieces are bent at right angles to the opposite side of the burner body with respect to the inclined portion, and are flat in the horizontal direction. More precisely, since the sandwiching piece is bent at a right angle to the inclined portion, it is provided upward. Further, the locking piece is usually provided between the upper and lower clamping pieces. The claw piece is bent toward the burner body with respect to the inclined portion, and is flat in the vertical direction. For the same reason as described above, it is preferable that the claw piece is provided substantially in parallel with the horizontal portion of the mounting bracket and on the upper portion of the inclined portion, particularly on the upper edge thereof. Further, it is preferable that the tip surfaces of the pair of claw pieces are curved in a convex shape so as to make smooth contact with the outer peripheral wall of the burner body, and are brought into contact with the outer peripheral wall by two-point contact. When the above-mentioned two-point contact in which each piece of the pair of claw pieces is provided on both side edges of the inclined portion and the interval between them is widened, the installation position of the flame detector becomes particularly stable.
Each of the sandwiching piece, the locking piece, and the claw piece is arranged symmetrically or on the center line of the inclined portion in the height direction. Further, the aforementioned leg pieces are provided on both side edges of the horizontal portion.
[0011]
When the mounting bracket (leg piece) is finally fixed to the mounting frame of the burner body, the angle of the inclined portion with respect to the horizontal portion is generally in the range of 50 to 70 °, and preferably in the range of 55 to 65 °. If the angle is in the range of 50 to 70 °, in a commercially available gas combustion apparatus, the position of the heat sensitive part of the flame detector is not too close or too far from the outer peripheral wall of the burner body, and flame detection is possible. It is possible to mount the vessel in an optimal position. The optimum position of the flame detector means that when the burner is set to low-fire combustion, the heat detector of the flame detector is arranged on the outer edge of the combustion flame opposite to the burner body.
[0012]
In the flame detector, a positioning groove for the heat sensitive part is formed on the outer periphery of the pencil-shaped body part. The flame detector is attached to the mounting bracket by locking the positioning groove between at least one pair of protrusions of the first mounting bracket or the clamping piece of the second mounting bracket, and the flame detector is attached to the burner body side. It is only necessary to make the both ends of the pressing member engage with the engaging pieces after the body part of the flame detector is brought into contact with the inclined portion of the mounting bracket while being pushed into the mounting member. That is, the flame detector can be fixed on the inclined portion of the mounting bracket by simple pushing from the side opposite to the burner body and the operation of locking the pressing member to the locking piece. When the positioning groove is locked by one of the upper and lower holding pieces, the other pair of holding pieces holds the flame detector body at a position separated from the positioning groove. When the flame detector is fixed to the mounting bracket, the upper portion (heat sensitive portion) of the flame detector is in a state of protruding from the inclined portion.
In the second mounting bracket, it is preferable that the positioning groove is formed in the lower part of the flame detector body and is sandwiched between the lower sandwiching pieces, but it is sandwiched between the upper sandwiching pieces or two positioning grooves are formed. The upper and lower holding pieces may be clamped. Further, it is only necessary to form a positioning groove at a position where the pair of sandwiching pieces engage, and it is not always necessary to cut the groove on the entire circumference of the flame detector body. Furthermore, it is also preferable that a groove in which the pressing member curved in an arc shape is fitted or loosely fitted is formed in the body portion of the flame detector.
[0013]
To fix the mounting bracket equipped with the flame detector to the burner body fixing mounting frame, first insert the tip of the horizontal part on the burner body side into the gap between the back surface of the burner body and the top surface of the mounting frame. At the same time, the leg pieces of the mounting bracket are inserted into a pair of slits formed on the upper surface of the mounting frame. Next, the mounting bracket is pushed in until the pair of claw pieces contact the outer peripheral wall of the burner body. With the claw pieces in contact with each other, the mounting bracket is fixed to the mounting frame by, for example, screwing the burner body to the mounting frame. The gap and the slit are set to be slightly wider than the plate thickness of the horizontal portion and the leg piece, respectively. The slit also serves as positioning of the mounting bracket with respect to the mounting frame.
Here, before the mounting bracket is fixed to the mounting frame of the burner body, the inclination angle formed by the inclined portion with respect to the horizontal portion is set to be 1 to 5 °, preferably 2 to 4 ° smaller than the final angle described above. Has been. In this way, using the mounting bracket in which the inclination angle at the time of processing is set in advance smaller than the final angle, and fixing the burner body to the mounting frame with the claw piece pressed against the outer peripheral wall of the burner body, The tilt angle is slightly expanded and adjusted to the final tilt angle described above.
In the present invention, the arrangement position of the heat sensitive part of the flame detector is exclusively regulated by the length of the claw piece. Even if there is some variation in the distance between the back surface of the burner body and the upper surface of the mounting frame, the positional relationship between the burner body and the flame detector is almost the same as the predetermined one. Even if the flame detector is mounted on the mounting bracket in the above-described procedure after the mounting bracket is fixed to the burner body fixing mounting frame, the positional relationship hardly changes.
[0014]
The 2nd attachment metal fitting in this invention can be manufactured from one sheet metal, for example by press work. Specifically, a notch portion is formed across the horizontal portion from the lower portion of the inclined portion, and in some cases from the lower portion of the inclined portion. A lower clamping piece before bending is formed extending from the upper end edge of the notch to the inside thereof.
In order to manufacture the mounting bracket, first, the sheet metal is cut, and the cutout portion is formed together with the flat and continuous horizontal portion and the inclined portion. At that time, the pair of claw pieces, the upper clamping piece and the locking piece are left outside the periphery of the inclined portion, and the pair of leg pieces are left on both sides of the horizontal portion. The claw pieces are formed on both upper side edges of the inclined portion, and are formed slightly upward when bent in parallel with the horizontal portion. The upper clamping piece is formed on the upper side from the upper end of the inclined portion. The locking pieces are formed on both side edges of the inclined portion. In addition, it is preferable to make the width | variety of the nail | claw piece formed in the outer side of the both-sides edge of an inclination part, and a locking piece shorter than the width | variety of the leg piece formed in the outer side of the both-sides edge of a horizontal part. The width here means the distance between the tips of each pair of pieces.
The cut sheet metal is then bent in the above-described direction to produce a second mounting bracket.
It will be apparent from the above description that the first mounting bracket can also be manufactured from a single sheet metal in accordance with the above method.
[0015]
Next, the present invention will be specifically described with reference to the drawings.
In FIG. 1A, reference numeral 1 a denotes a first thermocouple fixing fitting, which has a horizontal portion 2 and an inclined portion 3. The inclined portion 3 is bent upward toward the burner body at an inclination angle of 58 ° with the horizontal portion 2. Further, a cutout portion 4 a is formed at a substantially central portion of the inclined portion 3. A pair of leg pieces 5 bent vertically downward are provided on both side edges of the horizontal portion 2.
In the cutout portion 4a of the inclined portion 3, a protrusion 6a and a pair of vertically long sandwiching pieces 6b are provided at the center of the lower edge and on both side edges, respectively. Further, the inclined portion 3 is provided with a pair of locking pieces 7 on both side edges, a pair of horizontally long holding pieces 8 on the upper edge, and a claw piece 9a at the center of the upper edge. The pair of pieces (6b, 7, 8) are arranged symmetrically with respect to the center line in the height direction of the inclined portion 3.
The protrusion 6a protrudes on the opposite side to the burner body. The vertically long holding piece 6b, the vertically flat locking piece 7 and the horizontally long holding piece 8 are bent at right angles to the inclined portion 3 on the side opposite to the burner body. The shape of the locking piece 7 has an inverted L shape. The claw piece 9 a that is flat in the horizontal direction is bent toward the burner body and is parallel to the horizontal portion 2. Further, the tip surface of the claw piece 9a is curved in a concave shape so as to match the shape of the outer peripheral wall of the burner body.
[0016]
FIG. 1B shows a second thermocouple fixing bracket, and members having the same functions as those of the first fixing bracket are denoted by the same reference numerals in FIG.
The thermocouple fixing mounting bracket 1 b has a horizontal portion 2 and an inclined portion 3. The inclined portion 3 includes a lower portion having the same width as the horizontal portion 2, an intermediate portion that is narrower than the lower portion, and an upper portion that is narrower than the intermediate portion, and is folded upward toward the burner body 10 at an inclination angle of 58 ° with the horizontal portion 2. It is curved (see FIG. 3). Further, a notch 4b is formed in the mounting bracket 1b from the lower part of the inclined part 3 to a part of the horizontal part 2. A pair of leg pieces 5 bent vertically downward are provided on both side edges of the horizontal portion 2. The leg piece 5 is formed of a substantially rectangular piece, and a bent portion on the opposite side to the burner body is cut out, and a lower corner portion on the same opposite side is cut out to form a trapezoid.
The inclined portion 3 includes a pair of lower sandwiching pieces 6 at the upper end edge of the notch 4b formed at the lower portion, a pair of locking pieces 7 at both side edges of the intermediate portion, and a pair of upper sandwiching pieces 8 at the upper end edge of the upper portion. And a pair of claw pieces 9b are provided on both side edges of the upper end of the upper part. These pair of pieces (5 to 9b) are arranged symmetrically with respect to the center line in the height direction of the inclined portion 3.
The lower and upper holding pieces 6 and 8 that are flat in the horizontal direction are bent at a right angle to the inclined portion 3 on the opposite side of the burner body. The locking piece 7 flat in the vertical direction is bent at a right angle to the inclined portion 3 on the side opposite to the burner body, and the shape thereof is an inverted L shape. The claw piece 9 b that is flat in the vertical direction is bent at a right angle to the inclined portion 3 on the burner body side, and the upper end surface thereof is parallel to the horizontal portion 2. Further, the tip surface of the claw piece 9b is curved in an arc shape.
[0017]
2 and 3 show, as an example, a state in which the mounting bracket 1b shown in FIG. 1 (B) is attached to the burner body for a gas cooker on which a burner cap is placed, and FIG. The state which adhered to the frame is shown.
2 to 4, reference numeral 10 denotes a burner main body of the gas combustion apparatus, which includes an air mixing tube 11, an annular burner head 12, and a flat flange 13. The burner body 10 is formed by caulking the outer peripheral edges of two metal plates. The air mixing tube 11 is provided with a nozzle for supplying fuel gas inside the end portion, and a primary air suction port is formed on the end surface (not shown).
A burner cap 14 is detachably mounted on the burner head 12. A large number of grooves are provided on the rear surface of the outer peripheral portion of the burner cap 14, and a large number of flame holes 16 are formed between the grooves and the combustion gas outlet 15 formed in the burner head 12. Further, a flame hole group including a plurality of central flame holes 17 is arranged on the central annular portion of the burner head 12. In addition, screw holes 18 and 18 are formed in the tip corners of the flange portion 13.
On the other hand, the burner body fixing mounting frame 19 is formed of an elongated member having a U-shaped cross section with the opening facing downward. Engagement pieces 20 are provided at both ends of the mounting frame 19, and these engagement pieces 20 are respectively engaged with engagement holes formed in the grill box and the main body side plate of the gas cooking utensil (not shown). FIG. 3 shows the engaging piece 20 that is locked in the locking hole on the grill box side.
[0018]
Reference numeral 21 denotes a thermocouple having a heat-sensitive portion 22 at the top, and a positioning groove 23 is formed in the lower portion. A groove into which the pressing member 24 is fitted is also formed in the intermediate portion of the thermocouple 21. The pressing member 24 is made of a substantially semicircular rigid member having rings at both ends. The thermocouple 21 is connected via an electric cord 25 to a gas cock (not shown) having a built-in electromagnetic safety valve.
To attach the thermocouple 21 to the mounting bracket 1b, the positioning groove 23 is locked between the pair of pieces of the lower clamping piece 6, the thermocouple 21 is pushed into the burner body 10 side, and the outer surface of the thermocouple 21 is It is made to contact | abut on the inclination part 3 of the attachment metal fitting 1b. Thereafter, when the pressing member 24 is fitted into the groove and both end portions of the pressing member 24 are locked to the locking pieces 7, the thermocouple 21 is fixed to the mounting bracket 1b.
[0019]
The mounting bracket 1b to which the thermocouple 21 is fixed is fixed to the mounting frame 19 as follows.
A pair formed between the back surface of the burner body 10 and the upper surface of the mounting frame 19 with the tip of the horizontal portion 2 in a gap slightly wider than the plate thickness of the horizontal portion 2 and also on the upper surface plate of the mounting frame 19 and also serving as the positioning of the mounting bracket 1b. The leg pieces 5 are inserted into the slits (not shown) of the mounting frame 19 obliquely downward from the side opposite to the burner body 10. Screw holes are also formed on the top plate of the mounting frame 19 at locations corresponding to the screw holes 18, 18 drilled in the flange portion 13. When this screw hole is formed, the screw hole portion is cut. The gap is ensured by raising and bending it and polymerizing it along the upper plate.
When the pair of leg pieces 5 is inserted into the slit, the pair of claw pieces 9b are pushed in while the mounting bracket 1b is raised upward until the pair of claw pieces 9b come into contact with the outer peripheral wall of the burner body 10, and the claw pieces 9b are pressed against the burner body 10. The burner body 10 is fixed to the mounting frame 19 by inserting the screw 26 into the screw hole 18 and tightening the screw. As described above, when the burner body 10 is fixed to the mounting frame 19, the inclination angle of the inclined portion 3 with respect to the horizontal portion 2 is expanded by about 2 °, and finally the inclination angle becomes 60 °.
[0020]
【The invention's effect】
According to the present invention, a claw piece bent toward the burner body side is provided on the inclined portion of the mounting bracket to which the flame detection means is fixed, and the tip is brought into contact with the outer peripheral wall of the burner body. The arrangement position of the flame detection unit of the flame detection means is set in a state where the tip of the piece is in close contact with the outer peripheral wall of the burner body. For this reason, the position of the flame detection means is exclusively regulated by the length of the claw piece, so that the fixing position of the flame detection means with respect to the burner body is stabilized.
As a result, even if there is some variation in the inclination angle of the inclined portion with respect to the horizontal portion of the mounting bracket during the processing process, the installation position of the flame detecting portion is not greatly affected. Furthermore, even if there is a slight gap between the back surface of the burner main body before fixing and the upper surface of the mounting frame, the positional relationship between the burner main body and the flame detection means is almost the same as the predetermined one, and processing at the time of manufacturing the mounting bracket The degree of freedom increases. Therefore, the yield of the gas combustion apparatus resulting from the malfunction of the safety valve of the gas cock is improved.
[0021]
Moreover, the tip of each pair of claw pieces comes into contact with the outer peripheral wall of the burner body at two locations, and the installation position of the flame detection means with respect to the burner body can be more easily stabilized. Moreover, there exists an advantage that a nail | claw piece contacts the outer peripheral wall of a burner main body smoothly.
[Brief description of the drawings]
FIG. 1 (A) is a perspective view of a mounting bracket for fixing a first flame detection means attached to a gas combustion apparatus of the present invention, and FIG. 1 (B) is a mounting bracket for fixing the second flame detection means. FIG.
FIG. 2 is a plan view showing a state where a second mounting bracket is attached to the burner body of the gas combustion apparatus of the present invention on which a burner cap is placed.
3 is a cross-sectional view of FIG. 2 showing a state in which the burner body is fixed to its mounting frame.
FIG. 4 is a plan view showing a state in which the burner body is fixed to its mounting frame.
FIG. 5 is a plan view showing a state in which flame detecting means is attached to a conventional gas burner body on which a burner cap is placed.
6 is a cross-sectional view of FIG. 5 showing a state in which the burner body is fixed to its mounting frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mounting bracket, 2 ... Horizontal part, 3 ... Inclined part, 9 ... Claw piece, 10 ... Burner main body, 21 ... Flame detection means.

Claims

The flame detecting means is attached to a mounting bracket comprising a horizontal portion and an inclined portion bent upward from the horizontal portion toward the burner body, and the mounting bracket is fixed to the burner body with the upper portion protruding from the inclined portion. In the gas combustion apparatus, a claw piece bent toward the burner body with respect to the inclined portion is provided on the inclined portion of the mounting bracket, and the mounting bracket is formed at an angle formed by the inclined portion with respect to the horizontal portion before being fixed to the burner body. However, when the mounting bracket is fixed to the burner body, the tip of the claw piece is pressed against the outer peripheral wall of the burner body. abut, the claw piece is a pair of pieces, the burner body in the outer peripheral wall cylindrical, distal end surface of the two claws is equal to or in contact point to the outer peripheral wall of the burner body Gas combustion device.