1231856 玖、發明說明： t發明所屬之技術領诚3 本發明係有關於一種以利用保護體圍繞玻璃板外周緣 部之玻璃面板覆蓋爐本體上面的瓦斯爐，詳而言之，係有 5 關安裝於玻璃面板燃燒器開口之開口周緣之保護環的改 良0 L· 13 藉由以框等保護體保護玻璃板外周緣部之玻璃面板覆 蓋爐本體上面之玻璃面板的瓦斯爐早為人知，且開設於該 10 面板之玻璃板之燃燒器開口安裝有用以保護該開口周緣之 保護環。 以往’該保護環包含有可插入燃燒器開口内之筒部及 對向於玻璃板開口周緣上面與開口周緣下面之上下凸緣 部’使上下凸緣部可經由該筒部連結（譬如，參閱專利文獻 15 之第2圖）。 藉由將此種保護環安裝於燃燒器開口之開口周緣，可 保護開口周緣。又，為確實防止溢出的煮汁朝爐本體内落 下或保護玻璃板，在上凸緣部與玻璃板之間插設襯整或在 下凸緣部與玻璃板之間插設襯墊。 20 〔專利文獻1〕 特開平10-318545號公報 可是，在上述習知玻璃面板，由於保護環係圓型，當 /月知面板專之際保護環會轉動’傷害玻璃板之燃燒器開口 周緣表面或開口内周面，且在保護壤與玻璃板之間插設概 1231856 墊時’會有保護環之旋動損耗襯墊，結果造成脫落之缺點。 【發明内容3 本發明之課題在於提供一種當清掃等之際，不會因保 護環損傷玻璃面板，或產生所插設之襯墊損耗或脫落情形 5 的瓦斯爐。 為達成上述目的，本發明係一種瓦斯爐，係由可收容 瓦斯燃燒器之爐本體及可覆蓋該爐本體上面開口之面板所 構成者，又，該面㈣玻魏、圍繞其外職部之保護體、 及用以保護開設於前述玻璃板之燃燒器開口之開口周緣的 1〇保護環所構成，而前述保護環包含有可插入前述燃燒器開 口内之筒部、及對向於玻魏開σ周緣上面與開口周緣下 面且經由該筒部連結之上凸緣部，且，在前述下凸緣部形 成有到達並接觸前述保護體之一處以阻止前述保護環旋動 之延長部。 15 根據本發明，即使延長部之位置偏離保護體之上方， 由於很谷易利用下凸緣部之延長部接觸保護體，也能在延 長部形成朝下方之彎曲片。又，由於可確實防止溢出來的 煮汁朝爐本體内落下至面板，故在上凸緣部與玻璃板之間 可插設襯墊，且為了保護玻璃板，可在下凸緣部與玻璃板 20 之間插設襯墊。 在本發明中，即使使用者因破璃面板之清掃等接觸磨 擦保護環，下凸緣部之延長部與保護體之接觸部也會阻止 保濩環旋動，使保護環不會旋動。因而，因保護環而磨擦 損傷玻璃板燃燒器開口之開口周緣表面或燃燒器開口内周 1231856 或在玻璃板與保護環之間插設襯墊時，不會因保護環 磨擦損耗襯塾，結果襯墊也不會脫落。 ，在本發明另_形態中，在前述下凸緣部設有到達並接 觸刚述爐本體之-處以阻止前述保護環旋動之延長部，以 5取代在前述下凸緣部設置到達並接觸前述保護體之一處以 阻止述保護環旋動之延長部。 本發明再另一形態係由可收容瓦斯燃燒器之爐本體及 可覆盍該爐本體上面開口之面板所構成之瓦斯爐，又，該 面板由玻璃板、圍繞其外周緣部之保護體、及用以保護開 10設於前述玻璃板之燃燒器開口之開口周緣之保護環所構 成，而别述保護環包含有可插入前述燃燒器開口内之筒 部、及對向於玻璃板開口周緣上面與開口周緣下面且經由 該筒部連結之上下凸緣部，且至少在前述下凸緣部與玻璃 板之間插設有襯墊，其特徵在於：在前述下凸緣部形成有 15用以保持保持前述業已插設之襯塾的環狀凹部。 由於插設玻璃板下側之襯墊係藉玻璃板壓接，故因保 護環之旋動會由下凸緣部產生滑動力，使襯墊容易由下凸 緣部向直徑方向偏離脫落，但只要將襯墊保持在設置於下 凸緣部之環狀凹部中，就可限制襯墊之直徑方向的移動， 20 因此，即使保護環旋動，也可防止襯塾由下凸緣部向直徑 方向偏離脫落。 根據本發明，在下凸緣部之環狀凹部之外周部上端， 可設置接續該上端並與前述玻璃板對向之水平部。如此， 即使因保護環之旋動而使下凸緣抵接玻璃板下面，也難以 1231856 損傷玻螭板下面。而且，水平部之末端部朝向背離玻璃方 向彎曲時，由於水平部之末端面不會抵接玻璃板下面，即 使在水平部之末端面有邊緣或毛邊，也能確實防止玻璃板 下面受到損傷。 5 【】 以下配合第1〜4圖說明本發明瓦斯爐之一實施形態。 在第1〜4圖中，瓦斯爐係以玻璃面板10覆蓋爐本體52之上 面52a所構成。爐本體52由上面開放的矩形狀箱體形成，且 藉由將彎曲形成於爐本體52周壁上端之凸緣部52b卡止在 10 設置於系統化廚房之流理台面之開口 53a周緣，可吊持設置 於流理台面53之開口 53a。 玻璃面板10包含有耐熱性玻璃板（陶瓷玻璃)2、圍繞其 外周緣部之保護體3、及開設於玻璃板2左右之各位置且安 裝於燃燒¢5開口 2a之開口周緣之保護環20。又，收容於爐 15 本體52内之瓦斯燃燒器54面臨燃燒器開口 2a，且火架55載 置在玻璃板2之保護環20外側。在第4圖中，符號56係檢出 燃燒器54點火停止之熱電偶，且59係覆蓋火焰引導構件58 與保護環20間隙之湯汁蓋。 保護體3雖係支撐玻璃板2外周緣部之支撐框，但同時 也是保護玻璃板2外周緣部之構件。因而在本發明中，該保 護體3意味包含插設於玻璃板2外周緣部與支撐框之間之緩 衝材。在本實施形態中，將保護體3組裝形成前後兩支長的 框材4、5與左右兩支短的框材6、7之矩形狀，且在框材4、 5、6、7之間設有玻璃板2之設置領域，以支撐玻璃板2外周 1231856 緣"卩在本例中，在保護體3後部之框材7後方間隔地架上 後^片8 ’以在框材5、6、7，後部片8之間形成開口 u。該 開可作為吸氣口。在後框材5與後部片8之間能載置將 空氣導入開口 U之罩狀導板57。 5 後部片8係形成具有由垂直壁8a下端向内側水平突出 P b/、由垂直壁心上端向外側向下捲曲後向上凸起之 Λ緣。F 8c的截面構造，且前框材4、左右框材6、7也形成同 樣:構造。該等前框材4、左右框材6、7及後部片8之長向 雨端端面係朝内方變窄且以45度之角度傾斜。後框材5則形 1°成具有由垂直壁5a下端向前方水平突出之緣部5b之截面構 邊後框材5之長向兩端之緣部5b係朝内側變窄且以45度之 角度傾斜。 後部片8與右框材7係由歛合設置於後部片8之緣部卟 端部之逆三角形之頭部8bl與設置於框材7之緣部7b端部之 15二角形狀凹部7bl而結合。後部片8與左框材6，前框材4與 左框材6,前框材4與右框材7也同樣地結合，並將該等四支 框材4、6、7,後部片8裝配成框狀。又後框材5與左框材6 係由歛合設於後框材5之緣部5b之逆三角形狀頭部5Μ與設 置於左框材6之緣部6b途中之三角形狀凹部6bl而結合。後 20框材5與右框材7也可同樣地結合。 玻璃板2之支撐部係以矩形狀支撐框邊所構成，且該支 撐框邊係由荊後框材4、5，左右框材6、7之水平緣部4b、 5b、6b、7b形成，並且玻璃板2載置在該支撐部上面。在所 載置之玻璃板2與該等框材4、5、6、7之垂直壁4a、5a、6a、 1231856 7a之間，可填充作為緩衝材之矽填縫材9，使玻璃板2不會 偏離保護體3，以牢固保持並且確保水密性。 保護環20係由上環21與下環22構成，且該上下環21、 22包含有可插入燃燒器開口 2&内之筒部21b、22b與對向於 5玻璃板2開口周緣上面與開口周緣下面之上下凸緣部21a、 22a。在本例中，下環22之筒部22b以一定間隙插入燃燒器 開口 2a，且上環21之筒部21b嵌合下環22之筒部22b内周。 该間隙具有即使保護環熱膨脹，也不會對玻璃板2之燃燒器 開口 2a内周面施力之尺寸。 10 該上下環21、22之筒部21b、22b具有兩者在上下方向 大略全長地嵌合之長度，且在其中一者，譬如於上環21之 筒部21b上，於周方向複數處形成有卡合孔2ic，並且在下 環22之筒部22b上，於朝直徑方向内方突出之周方向複數處 形成有突起22c。而且，各突起22c卡合在各卡合孔21c上， 15 使上下環21、22不會分離，以結合兩筒部21與22。藉將如 此的保護環20安裝於玻璃板2之燃燒器開口2a開口周緣，可 保護開口周緣。此外，雖突起22c係以切起爪形成，但也可 作成壓花狀突起。 再者，在上凸緣部21a與玻璃板2之間插設襯墊23，以 20 襯墊23阻止從烹調器溢出來的煮汁由上環21與玻璃板2之 間之間隙通過燃燒器開口 2a繞進玻璃板2下面，可確實地防 止溢出來的煮汁朝爐本體2内落下。又，在下凸緣部22a與 玻璃板2之間，插設有用以保護玻璃板2襯墊24。 於本實施形態中，在下凸緣部22a設有環狀凹部22d， 10 1231856 且插設玻璃板2下側之襯塾24下部收容保持於該凹部22d。 在該下凸緣部22a之環狀凹部22d外周部全周，將對向於玻 璃板2與狹窄間隙之水平部22f接續設置於凹部22d上端。 插設於玻璃板2下側之襯墊24由於藉結合上下環21、22 5壓接玻璃板2，故藉由保護環20之旋動會由下凸緣部22a產 生滑動力，且襯墊24可輕易地由下凸緣部22a朝直徑方向分 離而脫落。如上述’下凸緣部22a設有環狀凹部22d，若將 襯墊24保持在該凹部22d，則由於能限制襯墊24直徑方向之 移動，故可防止襯墊24由上凸緣部22a偏離直徑方向脫落。 10又，只要設有凹部22(1，襯墊24就能輕易定位，且使在安裝 保護環20之際的組裝變得簡單。又，只要在凹部22d外周部 設置水平部22f與玻璃板2對向，即使下凸緣部22抵接玻璃 板2下面’也難以彳貝傷玻璃板2下面。 然而，若保護環20旋動，則上凸緣部21a之外周垂下部 15 21d磨擦玻璃板2之燃燒器開口周緣表面，有下環22之筒部 22b磨擦玻璃板2之燃燒器開口内周面之虞，且有損傷該等 面之危險性。 所以，在本發明中，在下凸緣部22a設置延長部22e作 為防止保護環20旋動之裝置。該延長部22e係以與下凸緣部 20 22a直徑略同一尺寸之寬度從下凸緣部22a之水平部22f單向 地水平延伸，且具有到達並接觸玻璃板2之保護體3之一處 的長度。在本實施形態中，延長部22e係伸長至與保護體3 之左右框材6、7平行玻璃板2後方，到達並接觸由保護體3 之後框材5之垂直壁5a下端向前方水平延伸之緣部北前端。 1231856 ^理想的是，在延長部22e寬度方向兩側部設置朝下方之 ¥曲片22el。如此，由於不僅可以只利用延長部22el之板 厚而與緣部5b前端之接觸，亦可藉由彎曲片^“在高度方 向上得到接觸，故可輕易接觸緣部5b前端，且可確實與緣 5邛5b之岫端接觸。又，藉由彎曲片22el提高延長部22e剛 性，可防止延長部22e變形。雖彎曲片22el越長該 剛性越 仫，但圖示之W並非〇，亦即至少筒部22b與彎曲片2261只 要在一部份重疊即可。 根據本實施形態，若因人清掃玻璃面板1〇等而接觸磨 10擦保護環20，則下凸緣部22a之延長部22e與後部框材5之緣 部5b之接觸部將成為保護環2〇之旋動阻力，使保護環2〇不 會旋動。因而，並不會產生因保護環擦傷玻璃板2之燃燒器 開口 2a開口周緣表面或開口内周面，或因保護環2〇磨擦損 耗插設於玻璃板2與保護20之間之襯墊23或24，結果使襯墊 15 脫落等缺點。又，由於將襯墊24保持在設置於下凸緣部22a 之環狀凹部22d，以限制襯塾24朝直徑方向之移動，故可防 止偏離下凸緣部22a而脫落。另外，藉凹部22d可使襯墊24 容易定位，且使安裝保護環20之際的裝配變得簡單。而且， 由於將設於凹部22d外周部之水平部22d與玻璃板2對向，即 20 使下凸緣部22接觸玻璃板2下面，也難損傷玻璃板2下面。 以下藉由第5〜7圖說明本發明另一實施形態。在本實 施形態中，瓦斯爐之玻璃面板30，燃燒器開口 2a設在玻璃 板2之前靠近左右各位置，而在左右燃燒器開口 2a間之後方 位置亦開設直徑比燃燒器開口 2a小之燃燒器開口 2b，且在 12 1231856 接著，將玻璃板2之殘餘兩側緣部插入殘餘的框材14、16之 凹溝，以固定器15與螺絲15d固定被固定之框材14, 17與殘 餘的框材14、16，並互相固定殘餘的框材丨4、16，藉此將 圍繞玻璃板2之保護體3裝配成框狀，並完成玻璃面板30。 5 在本實施形態中，在燃燒器開口 2a之開口周緣部所安 裝之保護環20，也在下環22之下凸緣部22a兩側部設置具有 朝下方之彎曲片22el之延長部22e。該延長部22e配合固定 器之水平部15a内端面寬度形成狹窄寬度，並朝水平部 Ua内端面延伸而接觸該内端面。 10 再者，安裝於燃燒器開口 2b之開口周緣部之保護環2〇a 係除了直徑比保護環20小以外均相同，且係由與保護環2〇 之上下環21、22同樣的上下環21A、22A所構成。在下環22A 之下凸緣部22A1兩側部，設置具有朝下向之彎曲片22E1之 延長部22E。該下凸緣部22A1之延長部22E與左右框材13、 15 14平行延伸至玻璃板2後方，並接觸在後框材Π安裝襯塾12 之破璃板2後緣部保持用凹溝之下片17c前端面。 特別地，在該例之玻璃面板30上，襯墊12安裝於玻璃 板2之外周，且由於下片i4c或固定器15之水平部15a與玻璃 板2裏面分離該襯墊12之厚度量，故朝下方之彎曲片26頂端 2〇 具有接觸面之機能。 此外，藉由將固定器15之水平部15a内側形成於突片 15b與朝相反側之彎曲片，也能作為接觸部。 在本實施形態中，即使因人清掃玻璃面板30等而接觸 磨擦保護環20、20A，保護環20、20A也不會旋動，不會磨 1231856 私損傷玻璃板2之燃燒器開口 2a、2b之開口周緣表面或燃燒 為開口内周面，或因保護環磨擦損耗插設於玻璃板2與保護 環20、20A間之襯塾，結果，使襯墊脫落。 在第8圖所示實施形態中，替代在第5圖保護體3之左右 5 框材13、14,前後框材16、17所使用之左右框材131、141， 前後框材161、171(僅後框材141圖示）均無下片，且譬如， 藉由安裝於框材141與161之固定器151之水平部151&與框 材141之上片141a、側片141b及水平部152a與框材161之上 片、側片，可保持安裝襯墊12之玻璃板2之鄰接側緣部。關 1〇 於框材141與171與安裝於此之固定器、框材131與171與安 裝於此之固定器及框材131與161與安裝於此之固定器也同 樣0 在本實施形態中，將保護環20之下環22之下凸緣部22a 之延長部22e已延伸至與前後框材161、171平行的玻璃板2 15側方’以接觸在右框材131、141之襯墊12之下片121a前端。 此外’在該例中’也可接觸保護體3之襯墊12以外之其 他構成要素，亦即左右框材131、141，前後框材161、171 或固定器151之水平部。 在第9圖所示之實施形態中，面板之保護體3外框使用 20以不銹鋼鋼板衝床加工一體形成框狀框部18者。框狀框部 18在全周包含有水平的上面部18a，在該上面部18a繼續朝 外方下降之傾斜部181)與接續該傾斜部18下端之内捲的捲 曲部18c。在接近捲曲部18c上端，來自縱向複數處之安裝 部18d水平地突出，且安裝部18d末端部向上方彎曲形成垂 15 1231856 直α卩18e。又，上面部18a靠近内方部份形成朝内方略微下 降之上面傾斜部18f。 又，對準設置於作為保護體3之框部18之安裝部18d與 固定器19之未圖示螺孔，再藉由螺絲19&將固定器19安裝於 5安I部18d。如此，藉由安裝之固定器19、框部18之垂直部 18e與上面傾斜部18f，可保持安裝有襯墊12之玻璃板2之側 緣部。 在本貫施形態中，保護環2〇之下凸緣部22a之延長部 22e面向保護體3之固定器19延伸，並接觸固定器19前端。 10延長部22e與在第3〜6圖所示實施形態同樣地具有朝下方 之彎曲片22el。利用本實施形態，也可達成與先前之實施 形態同樣的效果。 第10〜11圖表示本發明之另一實施形態。在先前之實 施形怨中，雖全都採用在廚房流理台面之開口吊特所設置 15之嵌入式瓦斯爐為例說明，但本實施形態中之瓦斯爐係使 爐本體32下面腳部33著座並載置於廚房之流理台面53之上 置式者。 覆蓋爐本體32上面開口 32a之玻璃面板4〇係以框狀保 護體43圍繞玻璃板2之周圍而形成者。該保護體43係將由水 20平的凸緣部43a内周端垂設之水平部43b接觸玻璃板2外周 部上面，且將由凸緣部43a外周端垂設之垂下部43c垂下至 水平設置於爐本體32之側壁34靠近上部位置之段部34a，以 設置於爐本體32。垂下部43c下端部形成朝内側之折疊部 43d。此外，玻璃板2係以保護體43與填縫材K黏合。 16 1231856 在開設於玻璃板2之燃燒器開口 2a周緣部，與之前者同 樣地安裝有由上下環21、22構成之保護環2〇，且在下環22 之凸緣22a設置有朝爐本體32之側壁34方向延伸之延長部 22e。在第1〇〜11圖中，與在第1〜9圖之符號同一之符號表 5 示同一構件。 在本實施形態中，係以在延長部22e之頂端設置期朝下 方之彎曲片27以取代在延長部22e兩側部設置朝下方之彎 曲片。而且在由爐本體32之側壁34上端區劃為向内側突出 之爐本體32上面開口 32a之上緣部35，設有與該彎曲片27接 10 觸之承接片28。 承接片28係由在其水平部28a具有矩形狀缺口部29之 截面L字形狀之板所構成，且將承接片28之垂直部28b接觸 後退至側壁34之段部34a上内側之上側壁部34b而安裝於上 緣部35。為防止干涉承接片28與玻璃板2，在上緣部35形成 15具有水平部35&之凹嵌部35b，且以螺絲28c將承接片28之水 平部28a安裝在該凹嵌部35之水平部35a上。 朝下凸緣22之延長部22e頂端下方之彎曲片27延伸至 裝於爐本體32之側壁34的上緣部35之承接片28之缺口部29 内，以接觸缺口部29内側面。因而，即使因人清掃玻璃面 20板40等而接觸磨擦保護環，下凸緣22a之延長部22e與承接 片28之缺口部29接觸部亦將會成為保護環2〇旋動之阻力， 使保護環20不旋動。 如上所述，雖藉螺止於爐本體32之側壁34來設置承接 片28 ’但也可將承接片28直接形成在側壁34上。又，雖在 17 1231856 下凸緣22之延長部22e設置有朝下方之彎曲片27，且在承接 片28設有缺口部29，但亦可在承接片28設置朝下方之彎曲 片27，而在下凸緣22b之延長部22e設置缺口部29。而且， 也可在爐本體32之側壁34不設置承接片28，且使朝下凸緣 5 22b之延長部22e下方之彎曲片27直接接觸爐本體32之側壁 34内面，以防止保護環2〇之旋動。於該例中，也能在下凸 緣22a形成襯墊24之收容凹部。 苐12圖表示本發明又一實施形態，在本實施形態中， 安裝於面板之玻璃板2之燃燒器開口 2a周緣部之保護環20 10係在下環38之下凸緣38a，與先前實施形態下環22之下凸緣 22a並不同，未設置止轉用延長部。在第12圖中，與第2圖 之付说為同一符號係表示同一構件。 因此’為了即使保護環20旋動亦可防止插設於玻璃板2 下側之襯墊24脫落等，在下凸緣部38a設置環狀凹部38d， 15 且將插設於玻璃板2下側之襯墊24下部收容且保持於該凹 38d。在該下凸緣38a之環狀凹部38d外周部全周，將與玻璃 板2以狹窄間隙對向之水平部38f接續設置於凹部38d上 端。又，水平部38f之末端部38e係如第12(b)圖所示，由背 離玻璃板2之方向彎曲，理想的是如第I2(a)圖所示，在内側 20形成可折疊之折疊部。在第12圖中，符號38b係下環38之筒 部，且38c係其卡合片。 插設於玻璃板2下側之襯墊24，由於藉結合上下環21、 38壓接玻璃板2，故藉由保護環20之旋動可由下凸緣部38a 產生滑動力，使襯墊24容易徑向偏離下凸緣部38&而脫落， 18 1231856 但如上述，只要在下凸緣部38a設置環狀凹部38d，且將襯 墊24保持在該凹部38d中，由於能限制襯墊24直徑方向之移 動，故可防止襯墊24徑向偏離上凸緣部38a而脫落。又，只 要設有凹部38d，襯墊24可輕易定位，安裝保護環20之際的 5 組裝也變得簡單。 又，只要在凹部38d之外周部設置水平部38f與玻璃板2 對向，即使下凸緣38a抵接玻璃板2下面，由於以水平的面 接觸玻璃板2下面，也難以損傷玻璃板2下面。然而，如第 12(c)圖所示，水平部38f之末端部38e仍舊在水平時，若在 10 水平部38f之末端面有邊緣或毛邊，則下凸緣38a抵接玻璃 板2下面時，則有損傷玻璃板2下面之虞。在本實施形態中， 如上述，由於將水平部38f之末端部38e朝背離玻璃板2方向 彎曲’水平部38f之末端面並無抵接玻璃板2下面之情形， 即使在水平部38f之末端面有邊緣或毛邊，也能確實防止損 15 傷玻璃板2下面。將水平部38f之末端部38e形成折疊於内側 之折疊部時，能更加提高玻璃板2之損傷防止效果。 如以上說明可知，根據本發明，在以保護體圍繞玻璃 板外周緣部之玻璃面板，由於在玻璃板燃燒器開口周緣部 所安裝之保護環下凸緣部到達並接觸保護體或爐本體之一 20 處，形成阻止保護環旋動之延長部。當清掃等之際，能防 止保護環轉動損傷玻璃板，或插設於保護環與玻璃板間之 襯墊或損耗或脫落。又，由於在下凸緣部設置收容插設於 玻璃板下面襯墊之環狀凹部，可防止襯墊徑向偏離下凸緣 部而脫落。 19 1231856 【圖式簡單說明】 第1圖係表示本發明瓦斯爐一實施形態面板之平面圖 (a)及裏面圖（b)。 $ *第2圖係表示由安裝於第1圖面板燃燒器開口周緣部之 保羞％延長部而產生的旋動阻止法之截面圖（a)及保護安裝 部之擴大截面圖（b)。 第3圖係表示第2圖保護環之下環之立體圖。 第4圖係表示瓦斯爐全體之一部份省略截面圖。 第5圖係表示本發明瓦斯爐其他實施形態之面板之裏 1〇 面圖。 第6圖係表示安裝第5圖面板之玻璃板之固定器之立體 圖。 第7圖係表示依在第5圖之面板保護環之延長部旋動阻 止法之戴面圖。 第8圖係表示依本發明瓦斯爐另一實施形態保護環之 延長部旋動阻止法之截面圖。 第9圖係表示依本發明瓦斯爐又一實施形態保護環之 延長部旋動阻止法之截面圖。 第10圖係表不依本發明瓦斯爐再一實施形態保護環之 延長:旋動阻止法之一部份省略立體圖。 弟11圖係表示第10圖實施形態之旋動阻止法之截面 圖。 6壯Γ12圖係表示以本發明瓦斯爐再—實施形態保護環之 戴面圖’表示保4環適合例之圖（a，b)及表示比較例 20 1231856 之圖（C)。 【圖式之主要元件代表符號表】 2…玻璃板 2a，2b…燃燒器開口 3…保護體 4，161…前框材 4a，5a，6a，7a，8a···垂直臂 4b，5b，7b…水平緣部 5，171…後框材 5bl，8bl···頭部 6，16，131···左框材 6b，8b…緣部(水平） 7，13，17，141···右框材 7bl···凹部 8…後部片 8a…垂直壁 8c，14f···凸緣部 9…矽填縫材 10，30，40…玻璃面板 11，32a…開口 12，23，24…襯墊 14…框材(左） 14a，141a···上片 14b，141b···側片 14c，17c…下片 14d···溝(凹） 14e，17e…溝 15，19，151···固定器 15a，151a…水平部 15b…突片 15c···螺絲孔 15d，19a…螺絲 18…框狀框部 18a···上面部 18b…傾斜部 18c···捲曲部 18cl···安裝部 18e，28b…垂直部 18f···上面傾斜部 20，20A···保護環 22e…延長部 21，21A···上環 21a，21b···上凸緣部 21c—^合孔 22，22A，38···下環 22a，38a···下凸緣部 21 1231856 22b，38b…筒部 22c…突起 22d···環狀凹部 22e…延長部 22el…彎曲片 22f，28a…水平部 27…彎曲片 28…承接片 29…缺口部 32，52…爐本體 33···下面腳部 34…側壁 34a…段部 34b···上側壁部 35…上緣部 35a…水平部 35b···凹嵌部 38c—^合片 38d···凹部 38e…末端部 38f，43b…水平部 43…框狀保護體 43a，52b···凸緣部 43c···垂下部 43d…折疊部 52a···爐本體上面 53···流理台面 53a···流理台面開口 54…瓦斯燃燒器 55…火架 56…熱偶 57…頭巾狀導板 58…火焰引導構件 59…鍋蓋 131…左框材 221231856 发明 Description of the invention: t The technology to which the invention belongs 3 The invention relates to a gas furnace that covers the upper surface of the furnace body with a glass panel that surrounds the outer periphery of the glass plate with a protective body. Specifically, there are 5 related Improved 0 L · 13 protection ring installed on the periphery of the opening of the glass panel burner opening. A gas furnace covering the glass panel above the furnace body with a glass panel that protects the outer periphery of the glass plate with a protective body such as a frame has long been known, and The burner opening of the 10-panel glass plate is provided with a protective ring to protect the periphery of the opening. Conventionally, 'the protective ring includes a cylindrical part that can be inserted into the opening of the burner and upper and lower flange parts facing the upper edge of the opening of the glass plate and the lower edge of the opening periphery' so that the upper and lower flange parts can be connected through the cylindrical part (for example, see Patent Document 15 (2). By mounting such a protective ring on the opening periphery of the burner opening, the opening periphery can be protected. In order to surely prevent the overflowing boiling juice from falling into the furnace body or protecting the glass plate, a liner is inserted between the upper flange portion and the glass plate, or a gasket is inserted between the lower flange portion and the glass plate. 20 [Patent Document 1] Japanese Unexamined Patent Publication No. 10-318545 However, in the conventional glass panel, the protective ring is a round type, so when the panel is used, the protective ring will rotate to 'damage the periphery of the burner opening of the glass plate' When the surface or the inner peripheral surface of the opening is inserted, and there are approximately 1231856 pads inserted between the protective soil and the glass plate, there will be a rotation loss pad of the protective ring, resulting in the disadvantage of falling off. [Summary of the Invention 3] The object of the present invention is to provide a gas furnace that does not damage the glass panel due to the protection ring or cause loss or fall-off of the inserted gasket during cleaning, etc. 5 In order to achieve the above object, the present invention is a gas furnace, which is composed of a furnace body that can accommodate a gas burner and a panel that can cover the opening on the upper surface of the furnace body. A protection body and a 10-ring protection ring for protecting the periphery of the opening of the burner opening of the glass plate, and the protection ring includes a barrel that can be inserted into the burner opening, and a glass opposite to the glass The upper rim of the opening σ and the lower rim of the opening are connected to the upper flange portion via the cylindrical portion, and an extension portion is formed in the lower flange portion to reach and contact one of the protection bodies to prevent the protection ring from rotating. According to the present invention, even if the position of the extension portion is deviated from above the protector, since the extension portion of the lower flange portion is easy to contact the protector, a downwardly bent piece can be formed in the extension portion. In addition, since the overflowed boiling juice can be reliably prevented from falling down to the panel inside the furnace body, a gasket can be inserted between the upper flange portion and the glass plate, and the lower flange portion and the glass plate 20 can be protected to protect the glass plate. Insert pads between. In the present invention, even if the user rubs the protective ring due to the cleaning of the broken glass panel, the contact portion between the extension of the lower flange portion and the protective body will prevent the retaining ring from rotating, so that the protective ring will not rotate. Therefore, if the protective ring causes friction damage to the opening peripheral surface of the glass plate burner opening or the internal circumference of the burner opening 1231856, or when a gasket is inserted between the glass plate and the protective ring, the protective ring will not lose the lining due to friction. The pad does not fall off. In another aspect of the present invention, the lower flange portion is provided with an extension portion that reaches and contacts the furnace body just described to prevent the protection ring from rotating, and 5 is provided in the lower flange portion to reach and contact One of the aforementioned protection bodies is an extension part for preventing the protection ring from rotating. In another aspect, the present invention is a gas furnace composed of a furnace body capable of accommodating a gas burner and a panel covering the opening on the upper surface of the furnace body, and the panel is composed of a glass plate, a protective body surrounding an outer peripheral portion thereof, And a protection ring for protecting the opening periphery of the burner opening provided on the glass plate, and the other protection ring includes a cylindrical part that can be inserted into the burner opening, and a periphery of the opening facing the glass plate The upper and lower flanges are connected to the upper and lower flanges through the cylindrical portion, and a gasket is inserted at least between the lower flange and the glass plate. In order to maintain the ring-shaped recess of the liner which has been inserted as described above. Since the gasket on the lower side of the inserted glass plate is crimped by the glass plate, a sliding force is generated by the lower flange portion due to the rotation of the protective ring, which makes the gasket easily deviate from the lower flange portion in a radial direction. As long as the gasket is held in the annular recess provided in the lower flange portion, the diameter movement of the gasket can be restricted. 20 Therefore, even if the protective ring rotates, the liner can be prevented from going from the lower flange portion to the diameter. The direction is off. According to the present invention, at the upper end of the outer peripheral portion of the annular recessed portion of the lower flange portion, a horizontal portion may be provided which continues the upper end and faces the glass plate. In this way, even if the lower flange abuts the lower surface of the glass plate due to the rotation of the protective ring, it is difficult to damage the lower surface of the glass plate 1231856. Furthermore, when the end portion of the horizontal portion is bent away from the glass, the end surface of the horizontal portion does not abut the lower surface of the glass plate, and even if there is an edge or burr on the end surface of the horizontal portion, damage to the bottom surface of the glass plate can be reliably prevented. 5 [] An embodiment of the gas furnace of the present invention will be described below with reference to Figs. 1 to 4. In Figures 1 to 4, the gas furnace is constructed by covering the upper surface 52a of the furnace body 52 with a glass panel 10. The furnace body 52 is formed by a rectangular box body which is opened on the upper side, and the flange portion 52b which is bent and formed on the upper end of the peripheral wall of the furnace body 52 is locked at the periphery of the opening 53a provided on the countertop of the systemized kitchen, and can be suspended. The opening 53 a provided on the fluid table 53 is held. The glass panel 10 includes a heat-resistant glass plate (ceramic glass) 2, a protective body 3 surrounding its outer peripheral edge portion, and a protective ring 20 which is opened at various positions around the glass plate 2 and is installed on the opening peripheral edge of the opening 5a. . Further, the gas burner 54 housed in the main body 52 of the furnace 15 faces the burner opening 2a, and the fire stand 55 is placed outside the protective ring 20 of the glass plate 2. In Fig. 4, reference numeral 56 denotes a thermocouple for detecting that the burner 54 has stopped being ignited, and 59 is a soup cover covering a gap between the flame guide member 58 and the protective ring 20. The protective body 3 is a support frame that supports the outer peripheral edge portion of the glass plate 2, but is also a member that protects the outer peripheral edge portion of the glass plate 2. Therefore, in the present invention, the protective body 3 means a buffer material interposed between the outer peripheral edge portion of the glass plate 2 and the support frame. In this embodiment, the protective body 3 is assembled to form a rectangular shape with two front and rear long frame materials 4, 5 and two short and right frame materials 6, 7 between the frame materials 4, 5, 6, and 7. There is an installation area of the glass plate 2 to support the outer periphery 1231856 of the glass plate 2 "In this example, the rear panel 8 'is spaced behind the frame material 7 at the rear of the protective body 3 to place the frame material 5, 6, 7, an opening u is formed between the rear pieces 8. This opening can be used as a suction port. A cover-like guide 57 for introducing air into the opening U can be placed between the rear frame member 5 and the rear sheet 8. 5 The rear sheet 8 is formed with a Λ edge that protrudes horizontally from the lower end of the vertical wall 8a to the inside inwardly, and curls downward from the upper end of the vertical wall center to the outside and then protrudes upward. The cross-sectional structure of F 8c, and the front frame material 4, left and right frame materials 6, 7 also form the same: structure. The longitudinal direction of the front frame material 4, the left and right frame materials 6, 7, and the rear sheet 8 is narrowed inward and inclined at an angle of 45 degrees. The rear frame material 5 is shaped at 1 ° to have a cross-section with edge portions 5b protruding horizontally forward from the lower end of the vertical wall 5a. The edge portions 5b of the long end portions of the rear frame material 5 are narrowed toward the inside and 45 degrees apart. Angle tilt. The rear sheet 8 and the right frame material 7 are formed by converging an inverse triangular head 8bl provided at the edge portion of the rear portion 8 and a porosity end of the rear sheet 8 and a 15-diagonal recess 7bl provided at the end of the edge 7b of the frame material 7. Combined. The rear sheet 8 and the left frame material 6, the front frame material 4 and the left frame material 6, the front frame material 4 and the right frame material 7 are similarly combined, and the four frame materials 4, 6, 7, and the rear sheet 8 Assembled into a frame. The rear frame material 5 and the left frame material 6 are combined by a reverse triangular shape head 5M convergingly provided on the edge portion 5b of the rear frame material 5 and a triangular shape concave portion 6bl provided in the middle of the edge portion 6b of the left frame material 6. . The rear 20 frame material 5 and the right frame material 7 can be similarly combined. The supporting portion of the glass plate 2 is formed by a rectangular supporting frame edge, and the supporting frame edge is formed by the horizontal edge portions 4b, 5b, 6b, and 7b of the queen frame materials 4, 5 and the left and right frame materials 6, 7. The glass plate 2 is placed on the support portion. Between the placed glass plate 2 and the vertical walls 4a, 5a, 6a, 1231856 7a of the frame materials 4, 5, 6, 7 can be filled with a silicon caulk 9 as a buffer material, so that the glass plate 2 Does not deviate from the protective body 3 to securely hold and ensure water tightness. The protective ring 20 is composed of an upper ring 21 and a lower ring 22, and the upper and lower rings 21 and 22 include the cylindrical portions 21b and 22b which can be inserted into the burner opening 2 & The lower and upper flange portions 21a, 22a. In this example, the cylindrical portion 22b of the lower ring 22 is inserted into the burner opening 2a with a certain gap, and the cylindrical portion 21b of the upper ring 21 is fitted into the inner periphery of the cylindrical portion 22b of the lower ring 22. This gap has a size that does not apply force to the inner peripheral surface of the burner opening 2a of the glass plate 2 even if the protective ring thermally expands. 10 The cylindrical portions 21b and 22b of the upper and lower rings 21 and 22 have a length that fits substantially full length in the vertical direction, and one of them, for example, is formed on the cylindrical portion 21b of the upper ring 21 in a plurality of circumferential directions. The engaging hole 2ic is formed with a plurality of protrusions 22c on the cylindrical portion 22b of the lower ring 22 in a plurality of circumferential directions protruding inward in the diameter direction. Further, each protrusion 22c is engaged with each of the engagement holes 21c, so that the upper and lower rings 21 and 22 are not separated, so that the two cylindrical portions 21 and 22 are combined. By mounting the protection ring 20 on the opening periphery of the burner opening 2a of the glass plate 2, the opening periphery can be protected. In addition, although the protrusion 22c is formed as a cut-and-raised claw, it may be formed as an embossed protrusion. Furthermore, a spacer 23 is inserted between the upper flange portion 21a and the glass plate 2, and the 20 gasket 23 prevents the cooking juice overflowing from the cooker from passing through the gap between the upper ring 21 and the glass plate 2 through the burner opening 2a. By winding under the glass plate 2, the overflowed boiling juice can be reliably prevented from falling into the furnace body 2. Further, a spacer 24 for protecting the glass plate 2 is interposed between the lower flange portion 22 a and the glass plate 2. In this embodiment, the lower flange portion 22a is provided with an annular recessed portion 22d, 10 1231856, and the lower portion of the lining 24 inserted into the lower side of the glass plate 2 is housed and held in the recessed portion 22d. A horizontal portion 22f facing the glass plate 2 and the narrow gap is continuously provided on the upper end of the recessed portion 22d over the entire periphery of the outer peripheral portion of the annular recessed portion 22d of the lower flange portion 22a. Since the gasket 24 inserted on the lower side of the glass plate 2 is crimped to the glass plate 2 by combining the upper and lower rings 21 and 22 5, a sliding force is generated by the lower flange portion 22 a by the rotation of the protective ring 20, and the gasket 24 can be easily separated in the diameter direction by the lower flange portion 22a and come off. As described above, the 'lower flange portion 22a is provided with the annular recessed portion 22d. If the gasket 24 is held in the recessed portion 22d, the radial movement of the gasket 24 can be restricted, so the gasket 24 can be prevented from moving from the upper flange portion 22a. Drop off the diameter. As long as the recess 22 (1) is provided, the gasket 24 can be easily positioned, and assembly at the time of mounting the protective ring 20 is simplified. Moreover, as long as the horizontal portion 22f and the glass plate 2 are provided on the outer periphery of the recess 22d In the opposite direction, even if the lower flange portion 22 abuts the lower surface of the glass plate 2, it is difficult to damage the lower surface of the glass plate 2. However, if the protection ring 20 rotates, the outer flange portion 21a hangs from the lower portion 15 21d and rubs the glass plate. The peripheral surface of the burner opening of 2 may cause the cylindrical portion 22b of the lower ring 22 to rub the inner peripheral surface of the burner opening of the glass plate 2, and there is a risk of damaging such surfaces. Therefore, in the present invention, the lower flange The portion 22a is provided with an extension portion 22e as a means for preventing the rotation of the protective ring 20. The extension portion 22e extends horizontally in one direction from the horizontal portion 22f of the lower flange portion 22a with a width approximately the same as the diameter of the lower flange portion 20 22a. And has a length reaching and contacting one of the protective bodies 3 of the glass plate 2. In this embodiment, the extension portion 22e is extended to be parallel to the left and right frame materials 6, 7 of the protective body 3 behind the glass plate 2 and reaches and The lower end of the vertical wall 5a of the frame material 5 is moved forward after contacting the protective body 3. The north front end of the edge portion extending flat. 1231856 ^ Ideally, the two side portions of the extension portion 22e in the width direction are provided with downwardly bent pieces 22el. In this way, not only can the plate thickness of the extension portion 22el be used to communicate with the edge portion 5b The contact of the front end can also be obtained by the bending piece ^ "in the height direction, so the front end of the edge portion 5b can be easily contacted, and it can be surely contacted with the 岫 end of the edge 5 邛 5b. Moreover, the extension is improved by the bending piece 22el The portion 22e is rigid and can prevent the extension portion 22e from being deformed. Although the longer the bending piece 22el is, the greater the rigidity is, but the W in the figure is not 0, that is, at least the cylindrical portion 22b and the bending piece 2261 need only partially overlap. In this embodiment, if a person cleans the glass panel 10 or the like and rubs the protective ring 20, the contact portion between the extended portion 22e of the lower flange portion 22a and the edge portion 5b of the rear frame member 5 will become the protective ring 2. The rotation resistance prevents the protection ring 20 from rotating. Therefore, the protection ring does not scratch the peripheral edge surface or the opening inner peripheral surface of the burner opening 2a of the glass plate 2 or the friction loss of the protection ring 20 Liner interposed between glass plate 2 and protection 20 23 or 24, as a result, the gasket 15 falls off. Also, the gasket 24 is held in the annular recessed portion 22d provided in the lower flange portion 22a to restrict the movement of the gasket 24 in the diameter direction, so that deviation can be prevented. The lower flange portion 22a is detached. In addition, the recessed portion 22d allows easy positioning of the gasket 24 and simplifies assembly when the protection ring 20 is mounted. Furthermore, the horizontal portion 22d provided on the outer periphery of the recessed portion 22d and The glass plates 2 face each other, that is, if the lower flange portion 22 contacts the lower surface of the glass plate 2, it is also difficult to damage the lower surface of the glass plate 2. Hereinafter, another embodiment of the present invention will be described with reference to Figs. 5 to 7. In this embodiment, In the glass panel 30 of the gas furnace, the burner opening 2a is provided near the left and right positions before the glass plate 2, and a burner opening 2b having a diameter smaller than that of the burner opening 2a is also provided behind the left and right burner openings 2a. 12 1231856 Next, insert the remaining edges of both sides of the glass plate 2 into the grooves of the remaining frame materials 14, 16 and fix the fixed frame materials 14, 17 and the remaining frame materials 14, 16 with the holder 15 and the screw 15d. , And fixed the remaining frame materials to each other. 4, 16, Thereby, the protective body 3 surrounding the glass plate 2 is assembled into a frame shape, and the glass panel 30 is completed. 5 In this embodiment, the protective ring 20 is attached to the opening peripheral portion of the burner opening 2a, and both sides of the flange portion 22a below the lower ring 22 are provided with extensions 22e having downwardly bent pieces 22el. The extension 22e forms a narrow width in accordance with the width of the inner end surface of the horizontal portion 15a of the holder, and extends toward the inner end surface of the horizontal portion Ua to contact the inner end surface. 10 Furthermore, the protective ring 20a mounted on the opening peripheral portion of the burner opening 2b is the same except that the diameter is smaller than the protective ring 20, and the upper and lower rings are the same as the upper and lower rings 21 and 22 of the protective ring 20. 21A, 22A. On both sides of the flange portion 22A1 below the lower ring 22A, an extension portion 22E having a downwardly bent piece 22E1 is provided. The extension 22E of the lower flange portion 22A1 extends parallel to the left and right frame materials 13 and 15 14 to the rear of the glass plate 2 and contacts the grooves for holding the rear edge portion of the broken glass plate 2 where the lining 12 is installed in the rear frame material Π. The front surface of the lower piece 17c. In particular, in the glass panel 30 of this example, the gasket 12 is mounted on the outer periphery of the glass plate 2 and the thickness of the gasket 12 is separated from the inside of the glass plate 2 by the horizontal portion 15a of the lower piece i4c or the holder 15, Therefore, the top 20 of the bent piece 26 facing downward has the function of a contact surface. In addition, the horizontal portion 15a of the holder 15 is formed inside the protruding piece 15b and the curved piece facing the other side can also serve as a contact portion. In this embodiment, even if a person cleans the glass panel 30 and contacts the friction protection rings 20 and 20A, the protection rings 20 and 20A will not rotate and will not wear 1231856. The burner openings 2a and 2b of the glass plate 2 will not be damaged. The peripheral surface of the opening may be burned to form the inner peripheral surface of the opening, or the liner inserted between the glass plate 2 and the protective rings 20, 20A due to frictional wear of the protective ring, and as a result, the gasket may fall off. In the embodiment shown in FIG. 8, the left and right frame materials 131 and 141 used for the left and right 5 frame materials 13 and 14, the front and rear frame materials 16 and 17, and the front and rear frame materials 161 and 171 ( Only the rear frame member 141 is shown) without a lower sheet, and for example, the horizontal part 151 & of the holder 151 mounted on the frame members 141 and 161 and the upper sheet 141a, the side sheet 141b and the horizontal part 152a of the frame member 141 With the top sheet and the side sheet of the frame material 161, the adjacent side edge portions of the glass plate 2 on which the gasket 12 is mounted can be held. Close 10 is the same for the frame materials 141 and 171 and the fixtures installed here, the frame materials 131 and 171 and the fixtures installed here and the frame materials 131 and 161 and the fixtures installed here. In this embodiment, too , The extension 22e of the flange portion 22a of the lower ring 22 of the protective ring 20 has been extended to the side of the glass plate 2 15 parallel to the front and rear frame materials 161 and 171 to contact the pads of the right frame materials 131 and 141 12 the front end of the lower sheet 121a. In addition, 'in this example', it is also possible to contact other components other than the pad 12 of the protective body 3, that is, the horizontal portions of the left and right frame materials 131, 141, the front and rear frame materials 161, 171, or the holder 151. In the embodiment shown in Fig. 9, the outer frame of the protective body 3 of the panel 20 is formed by punching a stainless steel plate to form a frame-like frame portion 18. The frame-like frame portion 18 includes a horizontal upper surface portion 18a throughout the entire circumference, and an inclined portion 181) which continues to descend outward on the upper surface portion 18a, and a curved portion 18c continuing from the lower end of the inclined portion 18. Near the upper end of the crimped portion 18c, the mounting portions 18d from a plurality of longitudinal positions protrude horizontally, and the end portion of the mounting portion 18d is bent upward to form a vertical 15 1231856 straight α 卩 18e. Further, the upper surface portion 18a is formed near the inner portion to form an upper inclined portion 18f which is slightly lowered inward. In addition, the mounting portion 18d provided on the frame portion 18 as the protective body 3 and the unillustrated screw hole of the holder 19 are aligned, and the holder 19 is mounted on the 5A portion 18d by screws 19 & In this way, the side edge portion of the glass plate 2 on which the gasket 12 is mounted can be held by the fixed fixture 19, the vertical portion 18e of the frame portion 18, and the upper inclined portion 18f. In this embodiment, the extension 22e of the flange portion 22a below the protective ring 20 extends toward the holder 19 of the protective body 3 and contacts the front end of the holder 19. The 10 extension portion 22e includes a downwardly bent piece 22el similarly to the embodiment shown in Figs. 3 to 6. According to this embodiment, the same effect as that of the previous embodiment can be achieved. Figures 10 to 11 show another embodiment of the present invention. In the previous implementation, although all built-in gas stoves with 15 installed on the openings of the kitchen countertops were taken as an example, the gas stove in this embodiment uses the bottom 33 of the furnace body 32 A person who is placed on the countertop 53 of the kitchen. The glass panel 40 covering the opening 32a on the upper surface of the furnace body 32 is formed by surrounding the glass plate 2 with a frame-shaped protective body 43. The protective body 43 contacts a horizontal portion 43b suspended from the inner peripheral end of the flange portion 43a flat with the water 20 to the upper surface of the outer peripheral portion of the glass plate 2 and hangs a lower portion 43c suspended from the outer peripheral end of the flange portion 43a to a horizontal position. The side wall 34 of the furnace body 32 is near the upper portion 34 a to be disposed on the furnace body 32. The lower end portion of the lower portion 43c forms a folded portion 43d facing inward. In addition, the glass plate 2 is bonded to the sealing material K with a protective body 43. 16 1231856 A protective ring 20 composed of upper and lower rings 21 and 22 is installed at the periphery of the burner opening 2a of the glass plate 2 in the same manner as the former, and a flange 22a of the lower ring 22 is provided with a furnace body 32 An extension 22e extending in the direction of the sidewall 34. In Figs. 10 to 11, the same symbols as those in Figs. 1 to 9 indicate the same components. In this embodiment, curved pieces 27 facing downward at the top of the extension portion 22e are replaced with downward curved pieces provided at both sides of the extension portion 22e. Further, an upper edge portion 35 of the upper opening 32a of the furnace body 32 which is partitioned inwardly from the upper end of the side wall 34 of the furnace body 32 is provided with a receiving piece 28 which is in contact with the curved piece 27. The receiving piece 28 is constituted by a plate having a cross-section L-shape having a rectangular cutout portion 29 at the horizontal portion 28 a, and the vertical portion 28 b of the receiving piece 28 is brought into contact with and retracted to the upper side of the side portion 34 a of the side wall 34. 34b is attached to the upper edge portion 35. In order to prevent interference between the receiving piece 28 and the glass plate 2, a recessed portion 35 b having a horizontal portion 35 & is formed in the upper edge portion 35, and the horizontal portion 28 a of the receiving piece 28 is mounted on the level of the recessed portion 35 with a screw 28 c.部 35a。 35a. The bent piece 27 below the top end of the extension 22e of the downward flange 22 extends into the cutout portion 29 of the receiving piece 28 mounted on the upper edge portion 35 of the side wall 34 of the furnace body 32 to contact the inner side surface of the cutout portion 29. Therefore, even if the friction protection ring is contacted by a person cleaning the glass surface 20 plate 40 or the like, the contact portion between the extension portion 22e of the lower flange 22a and the notch portion 29 of the receiving piece 28 will become resistance to the rotation of the protection ring 20, so that The guard ring 20 does not rotate. As described above, although the receiving piece 28 'is provided by screwing on the side wall 34 of the furnace body 32, the receiving piece 28 may be directly formed on the side wall 34. In addition, although the extension 22e of the lower flange 22 of 17 1231856 is provided with a downwardly bent piece 27 and the receiving piece 28 is provided with a notch portion 29, the receiving piece 28 may be provided with a downwardly bent piece 27, and A cutout portion 29 is provided in the extension portion 22e of the lower flange 22b. Moreover, the receiving piece 28 may not be provided on the side wall 34 of the furnace body 32, and the curved piece 27 below the extension 22e of the downward flange 5 22b directly contacts the inner surface of the side wall 34 of the furnace body 32 to prevent the protective ring 2. Rotation. In this example, it is also possible to form a receiving recessed portion of the gasket 24 in the lower flange 22a. Fig. 12 shows still another embodiment of the present invention. In this embodiment, the protective ring 20 10 attached to the periphery of the burner opening 2a of the glass plate 2 of the panel is attached to the lower ring 38 under the flange 38a, which is the same as the previous embodiment. The lower flange 22a of the lower ring 22 is different, and no rotation stop extension is provided. In Fig. 12, the same symbols as those in Fig. 2 indicate the same members. Therefore, 'in order to prevent the gasket 24 inserted on the lower side of the glass plate 2 from falling off even if the protective ring 20 is rotated, the lower flange portion 38a is provided with an annular recess 38d, 15 and inserted on the lower side of the glass plate 2. The lower part of the gasket 24 is accommodated and held in the recess 38d. A horizontal portion 38f opposed to the glass plate 2 with a narrow gap is continuously provided on the upper end of the concave portion 38d over the entire periphery of the annular concave portion 38d of the lower flange 38a. The end portion 38e of the horizontal portion 38f is bent from a direction facing away from the glass plate 2 as shown in FIG. 12 (b). It is desirable to form a foldable fold on the inner side 20 as shown in FIG. I2 (a). unit. In Fig. 12, reference numeral 38b denotes a cylindrical portion of the lower ring 38, and 38c denotes an engaging piece thereof. The gasket 24 inserted on the lower side of the glass plate 2 is crimped to the glass plate 2 by combining the upper and lower rings 21 and 38. Therefore, by the rotation of the protection ring 20, a sliding force can be generated by the lower flange portion 38a to make the gasket 24 It is easy to deviate radially from the lower flange portion 38 & 18 1231856. However, as mentioned above, as long as the annular flange portion 38d is provided in the lower flange portion 38a and the gasket 24 is held in the recess portion 38d, the diameter of the gasket 24 can be restricted The movement in the direction can prevent the gasket 24 from being radially deviated from the upper flange portion 38a and detached. In addition, as long as the recessed portion 38d is provided, the gasket 24 can be easily positioned, and assembly when the guard ring 20 is attached is also simplified. In addition, as long as the horizontal portion 38f is provided on the outer periphery of the recessed portion 38d to face the glass plate 2, even if the lower flange 38a abuts the lower surface of the glass plate 2, it is difficult to damage the lower surface of the glass plate 2 because it contacts the lower surface of the glass plate 2 with a horizontal surface. . However, as shown in FIG. 12 (c), when the end portion 38e of the horizontal portion 38f is still horizontal, if there is an edge or burr on the end surface of the horizontal portion 38f, the lower flange 38a abuts the lower surface of the glass plate 2. , There is a possibility that the lower surface of the glass plate 2 may be damaged. In this embodiment, as described above, since the end portion 38e of the horizontal portion 38f is bent away from the glass plate 2, the end surface of the horizontal portion 38f does not contact the lower surface of the glass plate 2, even at the end of the horizontal portion 38f. If the surface has edges or burrs, it can also prevent damage 15 and damage the glass plate 2 below. When the distal end portion 38e of the horizontal portion 38f is formed as a folded portion folded on the inside, the effect of preventing damage to the glass plate 2 can be further enhanced. As can be seen from the above description, according to the present invention, in the glass panel with the protective body surrounding the outer peripheral edge of the glass plate, the lower flange portion of the protective ring installed at the peripheral edge of the opening of the glass plate burner reaches and contacts the protective body or the furnace body. At 20 points, an extension is formed to prevent the guard ring from rotating. When cleaning, etc., it can prevent the protection ring from rotating and damaging the glass plate, or the gasket inserted between the protection ring and the glass plate can be worn out or fall off. In addition, since the annular recessed portion for accommodating the gasket inserted under the glass plate is provided in the lower flange portion, it is possible to prevent the gasket from being radially deviated from the lower flange portion and falling off. 19 1231856 [Brief description of the drawings] Fig. 1 is a plan view (a) and a back view (b) showing a panel of an embodiment of the gas furnace of the present invention. Fig. 2 is a cross-sectional view (a) of the rotation prevention method and an enlarged cross-sectional view (b) of the rotation prevention method generated by the shy% extension portion installed on the peripheral edge of the panel burner opening in Fig. 1. Fig. 3 is a perspective view showing the lower ring of the guard ring of Fig. 2; Fig. 4 is a cross-sectional view showing a part of the entire gas furnace. Fig. 5 is a top view 10 of a panel of another embodiment of the gas furnace according to the present invention. Fig. 6 is a perspective view showing a holder to which the glass plate of Fig. 5 is attached. Fig. 7 is a wearing view showing the rotation blocking method of the extension of the panel protection ring according to Fig. 5. Fig. 8 is a cross-sectional view showing a rotation prevention method of an extension of a protective ring according to another embodiment of the gas furnace according to the present invention. Fig. 9 is a cross-sectional view showing the rotation prevention method of the extension of the protective ring according to another embodiment of the gas furnace according to the present invention. Fig. 10 shows the extension of the protection ring according to another embodiment of the gas furnace according to the present invention: a perspective view of a part of the rotation prevention method is omitted. Figure 11 is a cross-sectional view showing the rotation prevention method of the embodiment shown in Figure 10. Fig. 6 and Fig. 12 show the wearing surface of the protective ring of the gas furnace re-implementation form according to the present invention ', which is a diagram (a, b) of a suitable example of the four rings, and a diagram (C) of Comparative Example 20 1231856. [Representative symbols for main components of the drawing] 2 ... glass plates 2a, 2b ... burner openings 3 ... protectors 4,161 ... front frame materials 4a, 5a, 6a, 7a, 8a ... vertical arms 4b, 5b, 7b ... horizontal edge portion 5,171 ... rear frame material 5bl, 8bl ... head 6,16,131 ... left frame material 6b, 8b ... edge portion (horizontal) 7,13,17,141 ... Right frame material 7bl ... Recess 8 ... Rear sheet 8a ... Vertical wall 8c, 14f ... Flange 9 ... Silicone sealant 10, 30, 40 ... Glass panel 11, 32a ... Opening 12, 23, 24 ... Pad 14 ... Frame material (left) 14a, 141a ... Upper sheet 14b, 141b ... Side sheet 14c, 17c ... Lower sheet 14d ... Groove (concave) 14e, 17e ... Groove 15, 19, 151 ... · Fixers 15a, 151a ... Horizontal portion 15b ... Protruding piece 15c ... Screw holes 15d, 19a ... Screw 18 ... Frame-shaped frame portion 18a ... Upper surface portion 18b ... Inclined portion 18c ... Curl portion 18cl ... · Mounting portions 18e, 28b ... Vertical portions 18f ··· Upper inclined portions 20,20A ·· Protection ring 22e ... Extensions 21,21A ·· Upper ring 21a, 21b ··· Upper flange portion 21c— ^ Hole 22, 22A, 38 ... Lower ring 22a, 38a ... Lower flange portion 21 1231856 22b 38b ... cylindrical part 22c ... protrusion 22d ... annular recess 22e ... extension 22el ... bending piece 22f, 28a ... horizontal portion 27 ... bending piece 28 ... receiving piece 29 ... notch portion 32, 52 ... furnace body 33 ... Lower foot portion 34 ... side wall 34a ... segment portion 34b ... upper side wall portion 35 ... upper edge portion 35a ... horizontal portion 35b ... recessed portion 38c- ^ segment 38d ... recessed portion 38e ... end portion 38f, 43b ... Horizontal part 43 ... Frame-shaped protective bodies 43a, 52b ... Flange part 43c ... Lower part 43d ... Folding part 52a ... Upper surface of the furnace body 53 ... Flow table 53a ... Flow table Opening 54 ... Gas burner 55 ... Fire stand 56 ... Thermocouple 57 ... Scarf-shaped guide 58 ... Flame guide member 59 ... Pot cover 131 ... Left frame material 22