1304111 (1) 九、發明說明 【發明所屬的技術領域】 本發明是關於在機車的消音器外側面設置有樹脂製的 消音器保護罩的機車用消音器裝置。 【先前技術】 習知的構造，在機車的消音器外側面設置消音器保護 • 罩，使高溫的消音器不會露出到外側。作爲其中一個例 子，是相對於安裝在消音器主體的支架，以螺栓來固定金 屬製的消音器保護罩（參照專利文獻1 )，將消音器保言隻 罩以樹脂製造，且藉由將其背面（朝向消音器的面，以τ 相同）實施電鍍處理，以降低輻射熱（參照專利文m 2 ) 0 〔專利文獻1〕1304111 (1) Description of the Invention [Technical Field] The present invention relates to a damper device for a locomotive in which a muffler protective cover made of a resin is provided on the outer surface of a muffler of a locomotive. [Prior Art] A conventional structure is provided with a muffler protection cover on the outer side of the muffler of the locomotive so that the high-temperature muffler is not exposed to the outside. As an example of this, a metal muffler protective cover is fixed by bolts with respect to a bracket attached to the muffler main body (refer to Patent Document 1), and the muffler is protected only by a resin, and by The back surface (the surface facing the muffler, the same as τ) is subjected to a plating treatment to reduce radiant heat (refer to Patent Document m 2 ) 0 [Patent Document 1]
曰本實開平2— 97185號公報 〔專利文獻2〕 日本特開2001 — 73758號公報 【發明內容】 〔發明欲解決的課題〕 近年來，在消音器是使用了用來淨化排出氣體的觸 媒。可是，如果使用觸媒的話’排氣溫度會變高而讓消音 -4- (2) 1304111 器的表面溫度變高，即使設置消音器保護罩，其表面溫度 還是會上升。爲了避免這種溫度上升的情形’需要充分地 使消音器保護罩遠離消音器主體’而如果這樣作的話，必 須使消音器保護罩與消音器主體的間隔加大，而很難提升 外觀性。 以樹脂來製作消音器保護罩’可提升隔熱效果，當在 其背面實施電鍍處理時，必須利用可進行電鍍處理的等級 • 的特殊的耐熱性樹脂，而會提高成本。可是，這種耐熱性 樹脂（例如，加入玻璃纖維的聚丙烯樹脂），對於塗裝用 的沖淡劑等的藥品的耐性很高，所以通常很難進行塗裝， 而不得不將染料或顏料等混合而將樹脂本身進行著色（在 本案將這種利用樹脂的配合所呈現的顏色稱作單純的著 色）。可是這種著色方式，並不能得到透明色調或金屬色 調或電鍍色調，無法提升具有高級感的外觀性。因此在本 案發明，是以提升樹脂製的消音器保護罩的外觀性來作爲 ®主要目的。 〔用以解決課題的手段〕 用來解決上述課題的本案的機車的消音器裝置的第1 發明，是具備有：連接於從引擎所延伸出的排氣管的後端 的消音器、以及覆蓋其外側面的消音器保護罩的機車用消 音器裝置，其特徵爲： 是以樹脂來製作上述消音器保護罩，並且是將內側的 第一保護罩與外側的第二保護罩重疊而作成內外的雙重構 (3) 1304111 造。 第2發明，是針對上述第1發明，將上述第一保護罩 相對於上述消音器的消音器主體進行彈性支承，並且將上 述第二保護罩安裝到上述第一保護罩。 第3發明，是針對上述第1發明，上述第一保護罩， 是使用耐熱性較第二保護罩更高的材料。 第4發明，是針對上述第1發明，上述第一保護罩， # 是經過著色的加入玻璃纖維的聚丙烯樹脂製作的，上述第 二保護罩，是透明的聚碳酸酯樹脂製作的。 第5發明，是具備有：連接於從引擎所延伸出的排氣 管的後端的消音器、以及覆蓋其外側面的消音器保護罩的 機車用消音器裝置，其特徵爲： 是以透明的樹脂來製作上述消音器保護罩。 第6發明，是針對上述第5發明，上述消音器保護罩 是以聚碳酸酯樹脂製作的。 # 第7發明，是針對上述第4〜第6發明，在上述透明 的消音器保護罩的內面形成有不透明處理層。 第8發明，是針對上述第7發明，上述不透明處理 層，是進行塗裝處理、電鍍處理或重疊著其他的著色構 件。 〔發明效果〕 藉由第1發明，由於是將消音器保護罩作成雙重構 造，所以可提升隔熱效果。而能藉由樹脂化而達成輕量 -6- (4) 13041 ίΐ 化。除此之外，由於第二保護罩不需要很高的耐熱性，所 以容易作成具有高級感的顏色’即使是樹脂製的消音器保 護罩，也能提升其外觀性。 藉由第2發明，可提升消音器保護罩的防震性，且簡 化第二保護罩的安裝動作。 藉由第3發明，由於是將第一保護罩作成經過著色的 加入玻璃纖維的聚丙烯樹脂，所以將第一保護罩作成具有 Φ 耐熱性的構造，不必加寬與消音器主體間的間隔’而可保 有良好的外觀性。 藉由第4發明，由於是將第二保護罩以透明的聚碳酸 酯樹脂來製作，所以第二保護罩的表面是光澤面，而能構 成金屬感或透明塗裝面的外觀。於是，即使第一保護罩不 容易著色成具有高級感的構造，而藉由第二保護罩能達成 高級感，而能讓使用著色樹脂的消音器保護罩的外觀更優 異。 • 藉由第5發明，是將消音器保護罩作成透明的，所以 可將表面作成光澤面，而能構成具金屬感或透明塗裝面的 外觀，所以可提升樹脂製消音器保護罩的外觀性。 藉由第6發明，是將消音器保護罩以透明度高的聚碳 酸酯樹脂製作，所以容易形成具有光澤的外觀性優異的外 觀面。 藉由第7發明，由於是在消音器保護罩的內面形成不 透明處理層，所以能作爲無法透視到內側的覆蓋外殼的機 會g，並且能在表面維持具有光澤的外觀。 (5) 1304111 藉由第8發明，能夠增加形成不透明處理層的自由 【實施方式】 以下，根據圖面來說明一實施例。第1圖是適用本發 明的消音器的速克達型機車的右側面圖。藉由管體構件所 形成的車體框架1，在其前端部設置有頭管2，中間部作 • 成最低的地板下部3，其後方作成朝斜後下方延伸的後部 框架4。 在頭管2是可自由轉動地支承著轉向柱5 ’轉向柱5 的下部是連結於前叉6，是可將支承於其下端部的前輪7 可自由進行轉向。在後部框架4是經由連桿而可自由擺動 地支承著擺動式動力單元8的前部。在擺動式動力單元8 的後部與後部框架4之間，是設置有後避震單元1 〇。而在 擺動式動力單元的後端部是支承著後輪1 1。 ® 排氣管12是從擺動式動力單元8的氣缸頭8a的排氣 管朝後方延伸而連接到消音器1 3。消音器1 3從側面觀 察，是重疊到後輪11上，以消音器支架14而被安裝到擺 動式動力單元8。在消音器13安裝著消音器保護罩。消音 器保護罩是作成將第一保護罩1 5及第二保護罩1 6內外重 疊的內外雙重構造。 在車體左側成爲與消音器1 3相反側的動力單元8的 上方，配置有空氣濾淸器1 7，是經由化油器1 8將淸淨空 氣供給到氣缸頭8 a。在後部框架4的後端部且在後輪11 -8- (6) 1304111 上方的位置支承著油箱2 0，經由化油器1 8將燃料 氣缸頭8 a。 在油箱20的前方且在擺動式動力單元8的上 置，配置有朝上方開口的置物箱2 1且將其支承於 架4，可藉由座墊22自由開閉。置物箱21、油箱 部框架4、化油器1 8、空氣濾淸器1 7、與擺動式動 8的各部分，是以後外殻23所覆蓋。 第2圖，是將消音器1 3部分放大的右側面圖 器13是金屬製的，是具備有：圓筒狀的消音器 3〇、及覆蓋其前後的開口的前蓋部31及端蓋部32 軸方向較長地配置到消音器主體部3 0的上部側面 罩支架23,是安裝著第一保護罩15。在前蓋部31 排氣管1 2的後端，在消音器主體部3 0的內部收容 (沒有圖示）。尾管32a從端蓋部32朝後方延伸 處藉由觸媒所淨化的排出氣體是排出到大氣中。 第一保護罩15是用來覆蓋消音器13的外側邊 部分的構件，是以耐熱性較佳的耐熱樹脂，例如加 纖維的聚丙烯樹脂所形成，是預先著色成適當的顏 一保護罩1 5所覆蓋的範圍，從側面觀察，其上下 是從較消音器1 3的上下方向中間部稍下方的部分 出到較消音器1 3的上端更上方處來進行覆蓋，前 則是較消音器1 3的前後端部更長，而突出到前後 行覆蓋。 第二保護罩1 6是重視外觀性的構件，雖然耐 供給到 方的位 後部框 20、後 力單元 。消音 主體部 ，在長 的保護 連接著 有觸媒 ，從該 的大半 入玻璃 色。第 方向， ，而突 後方向 來進 性比 -9- (7) 13041li 第一保護罩1 5較差，可是爲著色性較佳的樹脂，例如是 以聚碳酸酯樹脂所構成。第二保護罩1 6是透明的，在背 面是實施了作爲不透明處理的適當顏色的塗裝處理。於 是，表面是作成實施了金屬光澤或透明塗裝處理的外觀， 且背面的顏色可透過外表面側來看見。 第二保護罩1 6，是重疊到第一保護罩1 5上而藉由螺 栓3 4等的鎖裝構件來直接安裝。第二保護罩1 6是稍小於 • 第一保護罩1 5，且作成不同的形狀，其上緣部37朝前斜 下方傾斜，下緣部3 8看起來是與第一保護罩1 5的下緣部 3 6重疊。第一保護罩1 5的上緣部3 5與下緣部3 6是大致 平行的。在第二保護罩1 6的中央部是設置有略飛鏢形狀 的通氣孔3 9。其周圍是成爲朝內側（第一保護罩1 5側） 凹入的凹部40。 第3圖是顯示第2圖的3 — 3線剖面。保護罩支架3 3 是作成作爲上面部也就是安裝面3 3 a的略门字型剖面，是 # 以設置在開放端部的安裝腳部33b，藉由焊接等方式安裝 到消音器主體部30的表面。在保護罩支架33的安裝面 3 3 a是設置有焊接螺母4 1，在該處以螺栓4 2經由橡膠固 定件43來將第一保護罩1 5進行防震安裝。 橡膠固定件43，在與第一保護罩15的安裝面33a對 應的位置，設置有轂部狀的凹部44，是被嵌合在該凹部 44的底面所設置的安裝孔44a，而被抵接到安裝面33a。 45是中介在螺栓42的頭部與橡膠固定件43的上面部的墊 片，46是軸環。 -10- (8) 1304111 第二保護罩16，是覆蓋著螺栓42在第一保言 保護罩支架3 3的安裝部，上緣部3 7是朝內側彎 合到第一保護罩1 5所形成的安裝凹部47的段i 側。下緣部3 8也朝內側彎曲，而與下緣部3 6重 凹部47是在安裝孔44a的上方且從側面觀察是 部37，在上面讓第二保護罩16全體重疊著。 第一保護罩15，是距離消音器主體部30隔 # 覆蓋外側，上緣部3 5是位於消音器主體部3 0 方，覆蓋著消音器主體部30的外周略1/4的部 一保護罩1 5與第二保護罩1 6之間形成了空間48 間隔D是稍大於安裝腳部3 3 b的高度與凹音f 側突出量加起來的尺寸的程度。該間隔D，是能 音器3 0所造成的熱傳導影響的程度。 第4圖是顯示第2圖的4 一 4線剖面，第 16，是將螺栓34插入到，在長軸方向前後兩處 • 凹部49的各底面所形成的安裝孔49a，而鎖裝到 護罩1 5的對應位置所設置的夾緊螺母5 0。夾緊虫) 作成略U字型剖面的金屬製的構件，是藉由翹起 部52而與螺栓34鎖裝。 51是夾緊螺母50的穿孔，53是用來安裝夾 設置在第一保護罩15的安裝座部，54是其穿孔 來將夾緊螺母5 0安裝到安裝座部5 3的細縫部。； 54是與安裝孔49a及螺母部52 —致。螺栓34構 保護罩1 5與第二保護罩1 6的結合部，是從消音 建罩15與 曲，是嵌 部4 7a內 疊。安裝 沿著上緣 著間隔D 的略正上 分。在第 〇 ;44的內 夠避免消 二保護罩 所設置的 在第一保 I母5 0是 狀的螺母 緊螺母的 ，5 5是用 ，孔 5 1、 成的第一 器主體部 -11 - (9) 1304111 3 〇被分離開來，而不會讓熱量直接從消音器主體部3 ο傳 達過來。 第5圖是第2圖的5 — 5線剖面，透氣孔3 9是與第— 保護罩1 5所形成的通孔5 6重疊，讓來自於消音器主體部 30的表面的熱量通過該通孔56及凹部40如箭頭所示散逸 到外側，保持消音器主體部3 0的良好的冷卻性，且保_ 消音器主體部3 0與第一保護罩1 5及第二保護罩1 6內側 • 的空間5 7的良好的通氣性，防止該部分溫度上升。 第6圖是顯示第一保護罩1 5的側面觀察形狀，安_ 凹部47是形成爲各輪廓與第二保護罩1 6成爲同樣形狀， 在前後方向中間部形成略菱形的通孔5 6。夾著該通孔5 6 在前後分別形成凹部44及安裝座部53。在與安裝凹部47 的段部47a相接的前端部及後端，是貫穿形成有卡合孔 58 ' 59 〇 第7圖是顯示第二保護罩1 6的側面觀察形狀，在前 0 端一體地形成有卡合突起60。在後部上端也一體地形成有 卡合突起61 (參照第9圖）。 第8圖是顯示第7圖的8 - 8線剖面，卡合突起60， 是作成，一次朝內側彎曲之後，再彎曲成略平行而直直地 朝內側延伸的略曲軸狀的剖面，藉由插入到卡合孔5 9，而 重疊卡合到第一保護罩1 5的後部上端內側。 第9圖是顯示第7圖的9— 9線剖面，卡合突起61， 也是作成，朝內側彎曲之後，再彎曲成略平行而直直地朝 內側延伸的略曲軸狀的剖面，藉由插入到卡合孔5 9，而重 -12- (10) 1304111 疊卡合到第一保護罩1 5的後部上端內側。 第1 〇圖是顯示第6圖的1 0 _ 1 0線剖面部的夾緊螺母 5〇的安裝動作。安裝座部53是形成爲，從安裝凹部47的 一般面作出階段部63而朝內側更低一階層，細縫部55是 貫穿於該階段部63來形成。在該階段部63附近，面對於 細縫部5 5的安裝座部5 3的上端部，是作成錐狀部64，而 能容易進行夾緊螺母5 0的安裝。 夾緊螺母50，其形成有穿孔51的表面側65是從上方 被插入到細縫部55而被重疊到安裝座部53上，同時形成 有螺母部52的背面側66是分別被重疊到安裝座部53的 內側表面，以從表背面側夾住安裝座部5 3的方式來進行 安裝。 第11圖是消音器13的俯視圖，第12圖是從前方來 顯示消音器1 3的視圖。消音器支架1 4在側面觀察（第2 圖）’是將作成略三角形的兩枚板材14a及14b經由軸環 67、67讓中空的兩枚構件接合而一體化的構件，設置有軸 環67、67的部分也就是安裝部14c、14c，是朝向消音器 13的上下方向突出，而以螺栓被固定到擺動式動力單元8 (參照第1圖）。構成消音器支架1 4的外側的板材14b， 是被焊接到消音器1 3的表面，並且其一部分是重疊焊接 到前蓋部3 1。內側的板材1 4 a是被焊接到消音器1 3的表 面。（第12圖） 如第1 1圖所示，保護罩支架3 3，是以長度方向中間 部所形成的安裝腳部3 3 b，而被焊接到消音器1 3的表面。 -13- (11) 1304111 在安裝面33a設置有長孔狀的通孔68、68’在長度方 端部設置有穿孔69、69 ’在該部分的內側安裝有焊接 41(第3圖）。 接著，來說明消音器保護罩的安裝順序。首先， 在消音器13安裝第一保護罩15，如第3圖所示’在 罩支架33上重疊第一保護罩15，使預先安裝的橡膠 件43的軸環46的孔部與穿孔69 —致，將螺栓42從 # 穿到軸環46，而將其鎖裝到焊接螺母41 °藉此’將 保護罩1 5以保持著很大的間隔D的方式防震安裝到 罩支架33。 接著，如第6圖及第7圖所示，將第二保護罩] 疊到第一保護罩1 5的安裝凹部47，使凹部49的安 4 9a與預先安裝於第二保護罩16的安裝座部53的穿; 一致，如第4圖及第1 0圖所示，將螺栓34從外側通 裝孔49a、夾緊螺母50的穿孔51以及穿孔54，將其 •到螺母部5 2。 藉此將第二保護罩1 6安裝到第一保護罩1 5的 側。此時，在第二保護罩1 6與第一保護罩1 5之間形 空間部48。空間部48其上緣部37是作出了下緣部： 彎折量及凹部49的內側突出量程度的間隔d。 接著，來說明以這種方式安裝的消音器保護罩的 效果。首先，第一保護罩1 5，是加入了耐熱性優異的 纖維的聚丙烯樹脂，並且與消音器主體部3 0保持著 D，而能充分地降低第一保護罩1 5的表面溫度。可是 向兩 螺母 爲了 保護 固定 外側 第一 保護 6重 裝孔 FL 5 4 過安 鎖裝 表面 成有 丨8的 作用 玻璃 間隔 ，由 -14- (12) 1304111 於第一保護罩1 5是耐熱性樹脂，所以與金屬製的消音器 保護罩相比時，能更縮小間隔D，可提升外觀性。 並且，由於是作成第一保護罩1 5與第二保護罩1 6的 內外雙重構造，所以更能降低表面溫度。因此’當將牽動 車體時，即使腳位於消音器1 3的側邊，表面溫度也不會 讓人有不舒服的感覺。 第二保護罩1 6是透明性高的聚碳酸酯樹脂，所以其 ® 表面側雖然沒有塗裝但仍具有光澤，是呈現金屬感或透明 塗裝的高級感的外觀。於是，第一保護罩1 5雖然是在外 觀上具有限制的著色樹脂，而藉由第二保護罩1 6則不須 實施特別的表面處理，可得到具有高級感的外觀’能夠大 幅提升樹脂製消音器保護罩的外觀性。並且，不須使用昂 貴的耐熱性樹脂，雖然可提升外觀性，仍可使成本降低。 雖然第二保護罩1 6的耐熱性是較第一保護罩1 5更 差，卻是有利於用塗裝或電鍍方式加上顏色的聚碳酸酯樹 ® J3旨，利用該性質在內面施加作爲不透明處理層的適當顏色 的塗裝處理。於是，在重疊的部分會有作爲遮蓋第一保護 罩1 5的覆蓋構件的機能。並且’不透明處理層，能夠透 過透明層而從外側看見，所以能夠附加上喜歡的顏色。除 此之外，與第一保護罩1 5相比’其附加顏色的自由度變 高，且可提升外觀性。 並且，將第一保護罩1 5與第二保護罩1 6作成雙重構 造，在第一保護罩1 5與第二保護罩1 6之間形成空間部 4 8，並且能從透氣孔3 9將空間4 8內的熱量排出到大氣 -15- (13) 1304111 中，所以能將空間部48內進行換氣，熱量不會封閉 間部48內，而能夠防止第二保護罩1 6的表面溫度上: 除此之外，空間部4 8是藉由通孔5 6而與空間f 連通，所以能讓空間部5 7的熱氣通過通孔5 6及空間 而從透氣孔3 9排出到大氣中。於是，藉此可防止第 護罩15、第二保護罩16的表面溫度的上升。 由於第一保護罩15是藉由橡膠固定件43而被安 # 保護罩支架3 3，所以能進行防震支承，並且可達成保 支架3 3與第二保護罩1 6之間的隔熱安裝，能防止第 護罩15的溫度上升且能達成防震安裝。 並且，第二保護罩16，能夠藉由螺栓34而結合 一保護罩1 5，所以能簡單地進行安裝。除此之外，由 栓3 4所構成的結合部，是與消音器主體部3 0分離的 以熱量不會直接從消音器主體部3 0傳達到第二保 16，而能阻止第二保護罩16的表面溫度上升。 • 本發明並不限定於上述實施方式，而可進行各 形、應用。例如，消音器保護罩不一定要是雙重構造 可以是單體構造。在這種情況，藉由以聚碳酸酯樹脂 透明樹脂來構成消音器保護罩，則能將表面形成光澤 所以能得到呈現金屬感或透明塗裝的外觀，能得到具 感的外觀，而能提升樹脂製消音器保護罩的外觀性。 並且，如果在作成單體構造的透明樹脂製的消音 護罩的背面形成上述的不透明處理層的話，可得到與 同樣的提升外觀性的效果。而除了作爲不透明處理層 於空 汁。 那57 部48 一保 裝到 護罩 一保 到第 於螺 ，所 護罩 種變 ，也 等的 面， 高級 器保 上述 的塗 -16- (14) 1304111 裝處理以外，也可進行電鍍處理，或將其他的具有顏色的 材料以黏貼方式積疊在一起。藉此，利用聚碳酸酯樹脂等 的容易加上顏色的樹脂的性質，則可形成多樣的不透明處 理層，而能提高形成不透明處理層的自由度。 除此之外，如果實施鍍鉻處理或金屬塗裝處理來作爲 不透明處理層的話，則該不透明處理層能進行良好的熱反 射，藉此也能防止消音器保護罩的表面溫度的上升。 ©可是，也不一定要設置不透明處理層。如果沒有設置 不透明處理層的話，消音器保護罩會變成透明的，藉由穿 透看到下側的消音器，而具有輪廓感的效果。而針對形成 上述的不透明處理層，單體構造的消音器保護罩及雙重構 造的消音器保護罩的第二保護罩都能適用。 作爲消音器保護罩的樹脂，其耐熱性樹脂不只是加入 玻璃纖維的聚丙烯樹脂，也可使用在耐熱性方面相同效果 的其他樹脂。同樣的，透明樹脂也不限於聚碳酸酯樹脂， # 也可使用透明性優異的其他樹脂。 【圖式簡單說明】 第1圖是適用本發明的消音器的速克達型機車的右側 面圖。 第2圖是將消音器部分放大的側面圖。 第3圖是顯示第2圖的3 — 3線剖面。 第4圖是顯示第2圖的4 一 4線剖面。 弟5圖是第2圖的5 — 5線剖面。 -17- (15) 1304111 第6圖是第一保護罩的側面觀察視圖。 第7圖是第二保護罩的側面觀察視圖。 第8圖是顯示第7圖的8 — 8線剖面。 第9圖是顯示第7圖的9 一 9線剖面。 第1 〇圖是夾緊螺母的安裝動作的說明圖。 第1 1圖是消音器的俯視圖。 第1 2圖是從前方來顯示消音器的視圖。 【主要元件符號說明】 8 :擺動式動力單元 1 2 :排氣管 1 3 :消音器 14 :消音器支架 1 5 :第一保護罩 16 :第二保護罩 • 3 0 :消音器主體部 3 3 :保護罩支架 3 4 :螺栓 3 9 :透氣孔 42 :螺栓 43 :橡膠固定件 4 7 :安裝凹部 4 8 :空間部 5 0 :夾緊螺母 -18- (16)1304111 5 3 :安裝座部 5 6 :通孔 5 7 :空間部。 。 。 。 。 。 。 2 2 2 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 . However, if the catalyst is used, the exhaust gas temperature will increase and the surface temperature of the muffler -4- (2) 1304111 will become high. Even if the muffler cover is set, the surface temperature will rise. In order to avoid such a temperature rise, it is necessary to sufficiently keep the muffler cover away from the muffler body. If this is done, the interval between the muffler cover and the muffler body must be increased, and it is difficult to improve the appearance. The muffler cover is made of resin to improve the heat insulation effect. When the plating process is performed on the back side, it is necessary to use a special heat-resistant resin that can be plated. However, such a heat-resistant resin (for example, a polypropylene resin to which a glass fiber is added) is highly resistant to a drug such as a thinner for coating, so that it is usually difficult to apply the coating, and it is necessary to apply a dye or a pigment. The resin itself is colored by mixing (in the present case, the color exhibited by the compounding of the resin is referred to as simple coloring). However, this coloring method does not give a transparent hue or a metallic hue or an electroplated hue, and does not improve the appearance of a high-grade appearance. Therefore, in the present invention, the main purpose of the purpose of improving the appearance of the muffler protective cover made of resin is as follows. [Means for Solving the Problem] The first aspect of the muffler device for a locomotive according to the present invention for solving the above-described problems includes a muffler connected to a rear end of an exhaust pipe extending from an engine, and a cover A muffler device for a locomotive of a muffler cover of an outer surface is characterized in that the muffler cover is made of a resin, and the inner first cover and the outer second cover are overlapped to form an inner and outer inner cover. Double reconstruction (3) 1304111. According to a second aspect of the invention, the first protective cover is elastically supported with respect to the muffler main body of the muffler, and the second protective cover is attached to the first protective cover. According to a third aspect of the invention, in the first aspect of the invention, the first protective cover is made of a material having higher heat resistance than the second protective cover. According to a fourth aspect of the invention, in the first aspect of the invention, the first protective cover is made of a colored glass fiber-added polypropylene resin, and the second protective cover is made of a transparent polycarbonate resin. According to a fifth aspect of the invention, there is provided a damper device for a locator that is connected to a rear end of an exhaust pipe extending from an engine and a muffler cover that covers an outer surface thereof, and is characterized in that: The above-mentioned muffler protective cover is made of resin. According to a sixth aspect of the invention, the muffler protective cover is made of a polycarbonate resin. According to a seventh aspect of the invention, in the fourth to sixth aspects of the invention, an opaque treatment layer is formed on an inner surface of the transparent muffler protective cover. According to a seventh aspect of the invention, in the seventh aspect of the invention, the opaque layer is subjected to a coating treatment, a plating treatment, or a superposed coloring member. [Effect of the Invention] According to the first aspect of the invention, since the muffler protective cover is double-reconstructed, the heat insulating effect can be improved. Lightweight -6- (4) 13041 ΐ can be achieved by resinization. In addition, since the second protective cover does not require high heat resistance, it is easy to produce a color having a high-grade feeling. Even if it is a resin muffler protective cover, the appearance can be improved. According to the second aspect of the invention, the vibration resistance of the muffler cover can be improved, and the attachment operation of the second cover can be simplified. According to the third aspect of the invention, since the first protective cover is made of a colored glass fiber-added polypropylene resin, the first protective cover is formed to have a heat resistance of Φ, and it is not necessary to widen the space between the main body of the muffler. It can maintain good appearance. According to the fourth aspect of the invention, since the second protective cover is made of a transparent polycarbonate resin, the surface of the second protective cover is a glossy surface, and the appearance of the metallic feeling or the transparent coated surface can be formed. Therefore, even if the first protective cover is not easily colored into a structure having a high-grade feeling, and the second protective cover can achieve a high-grade feeling, the appearance of the muffler protective cover using the colored resin can be made superior. According to the fifth aspect of the invention, since the muffler protective cover is made transparent, the surface can be made into a glossy surface, and the appearance of the metallic or transparent coated surface can be formed, so that the appearance of the resin muffler protective cover can be improved. Sex. According to the sixth aspect of the invention, the muffler protective cover is made of a highly transparent polycarbonate resin, so that it is easy to form an outer surface having excellent gloss appearance. According to the seventh aspect of the invention, since the opaque treatment layer is formed on the inner surface of the muffler protective cover, it is possible to maintain the glossy appearance on the surface as an opportunity to cover the outer casing. (5) 1304111 According to the eighth aspect of the invention, it is possible to increase the freedom of forming the opaque treatment layer. [Embodiment] Hereinafter, an embodiment will be described based on the drawings. Fig. 1 is a right side view of a Scooter type locomotive to which the muffler of the present invention is applied. The body frame 1 formed by the tubular member is provided with a head pipe 2 at its front end portion, the intermediate portion serving as the lowest floor lower portion 3, and the rear portion being formed as a rear frame 4 extending obliquely rearward and downward. The head pipe 2 is rotatably supported by the steering column 5'. The lower portion of the steering column 5 is coupled to the front fork 6, so that the front wheel 7 supported at the lower end portion thereof can be freely steered. The rear frame 4 is rotatably supported by the front portion of the swing type power unit 8 via a link. Between the rear portion of the oscillating power unit 8 and the rear frame 4, a rear suspension unit 1 is provided. At the rear end portion of the oscillating power unit, the rear wheel 11 is supported. The exhaust pipe 12 is connected rearward from the exhaust pipe of the cylinder head 8a of the oscillating power unit 8 to be connected to the muffler 13. The muffler 13 is viewed from the side and is superposed on the rear wheel 11, and is attached to the oscillating power unit 8 by the muffler bracket 14. A muffler cover is attached to the muffler 13. The muffler protective cover is constructed to have a double inner and outer structure in which the first protective cover 15 and the second protective cover 16 are overlapped inside and outside. An air filter 17 is disposed above the power unit 8 on the left side of the vehicle body opposite to the muffler 13 by supplying the clean air to the cylinder head 8a via the carburetor 18. The fuel tank 20 is supported at a rear end portion of the rear frame 4 and above the rear wheels 11-8-(6) 1304111, and the fuel cylinder head 8a is passed through the carburetor 18. In front of the oil tank 20 and above the swing power unit 8, a compartment 2 1 that is open upward is disposed and supported by the rack 4, and the seat cushion 22 can be freely opened and closed. The compartment 21, the tank frame 4, the carburetor 18, the air filter 17, and the respective portions of the swinging motion 8 are covered by the casing 23. In the second drawing, the right side panel 13 in which the muffler 13 is partially enlarged is made of metal, and includes a cylindrical muffler 3A and a front cover portion 31 and an end cover covering the front and rear openings. The portion 32 is disposed in the upper side cover bracket 23 of the muffler main body portion 30 in the axial direction, and the first protective cover 15 is attached. The rear end portion of the front cover portion 31 is housed inside the muffler main body portion 30 (not shown). The exhaust gas purified by the catalyst from the end portion 32a extending rearward from the end cap portion 32 is discharged to the atmosphere. The first protective cover 15 is a member for covering the outer side portion of the muffler 13, and is formed of a heat-resistant resin which is preferably heat-resistant, such as a fiber-reinforced polypropylene resin, and is preliminarily colored into a suitable protective cover. The range covered by 15 is viewed from the side, and the upper and lower portions are covered from the portion slightly below the middle portion of the upper and lower sides of the muffler 13 to the upper end of the muffler 13 to cover, and the front is silenced. The front and rear ends of the device 13 are longer and protrude to the front and rear lines. The second protective cover 16 is a member that pays attention to the appearance, and is resistant to the rear frame 20 and the rear force unit. The main part of the muffler is connected to the catalyst in the long protection, and the glass is colored from the majority. The first direction, and the rearward direction of the progressiveness ratio -9-(7) 13041li, the first protective cover 15 is inferior, but a resin having a good coloring property, for example, a polycarbonate resin. The second protective cover 16 is transparent, and the back surface is coated with an appropriate color as an opaque treatment. Therefore, the surface is formed to have a metallic luster or a clear coating treatment, and the color of the back surface can be seen through the outer surface side. The second protective cover 16 is directly attached to the first protective cover 15 and is directly attached by a locking member such as a bolt 3 4 . The second protective cover 16 is slightly smaller than the first protective cover 15 and is formed in a different shape, the upper edge portion 37 is inclined obliquely downward toward the front, and the lower edge portion 38 is similar to the first protective cover 15 The lower edge portion 36 overlaps. The upper edge portion 35 of the first protective cover 15 is substantially parallel to the lower edge portion 36. In the central portion of the second protective cover 16 is a vent hole 39 provided with a slightly dart shape. The periphery thereof is a recess 40 which is recessed toward the inner side (the side of the first protective cover 15). Fig. 3 is a 2-3 line cross section showing Fig. 2; The protective cover bracket 3 3 is a slightly cross-shaped cross section which is formed as an upper surface, that is, the mounting surface 33 3 a, and is attached to the muffler main body portion 30 by welding or the like to the mounting leg portion 33b provided at the open end portion. s surface. The mounting surface 3 3 a of the boot bracket 33 is provided with a weld nut 4 1 where the first boot 15 is shock-mounted by the bolts 4 2 via the rubber retainer 43. The rubber fixing member 43 is provided with a boss-shaped recessed portion 44 at a position corresponding to the mounting surface 33a of the first protective cover 15, and is fitted to the mounting hole 44a provided in the bottom surface of the recessed portion 44, and is abutted. Go to the mounting surface 33a. 45 is a spacer interposed on the head portion of the bolt 42 and the upper surface portion of the rubber fixing member 43, and 46 is a collar. -10- (8) 1304111 The second protective cover 16 is a mounting portion of the first protective cover bracket 3 3 which is covered with the bolt 42. The upper edge portion 37 is bent inwardly to the first protective cover 15 The segment i side of the mounting recess 47 formed. The lower edge portion 38 is also bent toward the inner side, and the lower edge portion 36 is formed above the attachment hole 44a and viewed from the side as the portion 37, and the second protective cover 16 is entirely overlapped on the upper surface. The first protective cover 15 is disposed outside the muffler main body portion 30, and the upper edge portion 35 is located at the muffler main body portion 30, and covers a portion of the outer periphery of the muffler main body portion 30. A space 48 is formed between the cover 15 and the second protective cover 16 . The interval D is a degree slightly larger than the height of the mounting leg portion 3 3 b and the amount of the concave sound f side projection amount. This interval D is the extent of the heat conduction effect caused by the stimulator 30. Fig. 4 is a view showing a 4-four-line cross section of Fig. 2, and a sixth mounting hole 49a formed by inserting the bolts 34 into the front and rear sides of the concave portion 49 in the longitudinal direction, and locking is attached thereto. A clamping nut 50 is provided at a corresponding position of the cover 15. The clamped metal member is formed of a metal member having a slightly U-shaped cross section, and is locked to the bolt 34 by the lift portion 52. 51 is a perforation of the clamp nut 50, 53 is a mounting seat portion for mounting the clip to the first protective cover 15, and 54 is a slit portion for perforating the clamp nut 50 to the mounting seat portion 53. 54 is identical to the mounting hole 49a and the nut portion 52. The bolt 34 structure is a joint portion of the protective cover 15 and the second protective cover 16 from the sound absorbing cover 15 and the curved portion, and is embedded in the fitting portion 47a. Installation Slightly up the interval D along the upper edge. In the second; 44, it is enough to avoid the nut tightening nut provided in the first protective cover 50, and 5 5 is used, the hole 5 1 , the first main body portion -11 - (9) 1304111 3 The 〇 is separated without transferring heat directly from the muffler body 3 ο. 5 is a 5 - 5 line cross section of Fig. 2, and the vent hole 39 is overlapped with the through hole 56 formed by the first protective cover 15 to allow heat from the surface of the muffler main body portion 30 to pass through the through hole. The hole 56 and the recessed portion 40 are dissipated to the outside as indicated by the arrow, and maintain the good cooling property of the muffler main body portion 30, and the inside of the muffler main body portion 30 and the first protective cover 15 and the second protective cover 16 • The space of 5 7 is well ventilated to prevent this part from rising in temperature. Fig. 6 is a view showing a side view of the first protective cover 150, and the recessed portion 47 is formed such that each contour has the same shape as that of the second protective cover 16, and a through-hole 56 is formed in the middle portion in the front-rear direction. The recessed portion 44 and the mounting seat portion 53 are formed in front and rear, respectively, with the through hole 5 6 interposed therebetween. The front end portion and the rear end portion that are in contact with the segment portion 47a of the mounting recess 47 are formed with an engaging hole 58' 59. The seventh drawing shows the side view shape of the second protective cover 16 and is integrated at the front 0 end. An engaging projection 60 is formed in the ground. An engaging projection 61 is also integrally formed at the upper end of the rear portion (see Fig. 9). Fig. 8 is a cross-sectional view taken along line 8-8 of Fig. 7, and the engaging projection 60 is formed by bending a slightly crank-like cross section which is slightly parallel and extends straight inward after being bent inwardly. It is inserted into the engaging hole 5 9 and overlapped and engaged to the inner side of the rear upper end of the first protective cover 15 . Fig. 9 is a cross-sectional view taken along line 9-9 of Fig. 7, and the engaging projection 61 is also formed. After being bent inward, it is bent into a slightly crank-like cross section which is slightly parallel and extends straight inward, by inserting To the engaging hole 5 9, and the weight -12-(10) 1304111 is engaged to the inner side of the rear upper end of the first protective cover 15. The first drawing shows the mounting operation of the clamp nut 5〇 in the section of the line 1 0 _ 1 0 of Fig. 6. The mounting seat portion 53 is formed such that the step portion 63 is formed from the general surface of the mounting recess portion 47 and is lowered toward the inner side, and the slit portion 55 is formed through the step portion 63. In the vicinity of the stage portion 63, the upper end portion of the mounting seat portion 5 3 of the slit portion 55 is formed into a tapered portion 64, and the clamping nut 50 can be easily attached. The clamp nut 50 having the surface side 65 formed with the through hole 51 is inserted into the slit portion 55 from above and overlapped to the mounting seat portion 53, while the back side 66 on which the nut portion 52 is formed is respectively overlapped to the mount The inner surface of the portion 53 is attached so as to sandwich the mount portion 53 from the front and back sides. Fig. 11 is a plan view of the muffler 13, and Fig. 12 is a view showing the muffler 13 from the front. The muffler holder 14 is viewed from the side (Fig. 2). The two sheets 14a and 14b which are formed in a slightly triangular shape are joined by a hollow member and joined by the hollow members 67 and 67, and are provided with a collar 67. The portions of 67, that is, the attachment portions 14c and 14c project toward the vertical direction of the muffler 13, and are fixed to the swing power unit 8 by bolts (see Fig. 1). The plate 14b constituting the outer side of the muffler holder 14 is welded to the surface of the muffler 13 and a part thereof is overlap-welded to the front cover portion 31. The inner sheet 14 a is welded to the surface of the muffler 13 . (Fig. 12) As shown in Fig. 1, the protective cover holder 3 3 is welded to the surface of the muffler 13 by the mounting leg portion 3 3 b formed at the intermediate portion in the longitudinal direction. -13- (11) 1304111 The through holes 68, 68' having long holes in the mounting surface 33a are provided with perforations 69, 69' at the longitudinal end portions, and the welding 41 is attached to the inside of the portion (Fig. 3). Next, the installation sequence of the muffler cover will be described. First, the first protective cover 15 is attached to the muffler 13, and as shown in Fig. 3, the first protective cover 15 is overlapped on the cover holder 33 so that the hole portion of the collar 46 of the pre-installed rubber member 43 and the through hole 69 are provided. Thus, the bolts 42 are threaded from # to the collar 46, and they are locked to the weld nut 41° to thereby shock-shield the protective cover 15 to the cover bracket 33 in such a manner as to maintain a large interval D. Next, as shown in FIGS. 6 and 7, the second protective cover is folded over the mounting recess 47 of the first protective cover 15 to mount the mounting portion 49 of the recess 49 and the second protective cover 16 in advance. The wear of the seat portion 53 is identical. As shown in Figs. 4 and 10, the bolt 34 is passed from the outer through hole 49a, the through hole 51 of the clamp nut 50, and the through hole 54 to the nut portion 52. Thereby, the second protective cover 16 is attached to the side of the first protective cover 15 . At this time, the space portion 48 is formed between the second protective cover 16 and the first protective cover 15 . The upper edge portion 37 of the space portion 48 is an interval d at which the lower edge portion is formed by the amount of bending and the amount of protrusion of the inside of the recess portion 49. Next, the effect of the muffler cover installed in this manner will be explained. First, the first protective cover 15 is a polypropylene resin to which fibers having excellent heat resistance are added, and D is held by the muffler main body portion 30, and the surface temperature of the first protective cover 15 can be sufficiently lowered. However, in order to protect the fixed outer side first protection 6 re-installation hole FL 5 4, the surface of the lock is made to have a function of 丨8, and the heat resistance is determined by the first protective cover 15 by -14-(12) 1304111. Resin, when compared with a metal muffler protective cover, the spacing D can be further reduced, and the appearance can be improved. Further, since the inner and outer double structures of the first protective cover 15 and the second protective cover 16 are formed, the surface temperature can be further lowered. Therefore, when the vehicle body is to be pulled, even if the foot is located on the side of the muffler 13, the surface temperature does not cause an uncomfortable feeling. Since the second protective cover 16 is a polycarbonate resin having high transparency, the surface of the ® surface is glossy without being coated, and it is a high-grade appearance which is metallic or transparent. Therefore, the first protective cover 15 is a colored resin having a limited appearance, and the second protective cover 16 does not require a special surface treatment, and a high-grade appearance can be obtained. The appearance of the muffler cover. Moreover, it is not necessary to use an expensive heat-resistant resin, and although the appearance can be improved, the cost can be reduced. Although the heat resistance of the second protective cover 16 is worse than that of the first protective cover 15, it is advantageous for coating or plating to add color to the polycarbonate tree J3, and this property is applied to the inner surface. A coating process of an appropriate color as an opaque treatment layer. Thus, there is a function as a covering member for covering the first protective cover 15 in the overlapped portion. Further, the 'opaque layer can be seen from the outside through the transparent layer, so that a favorite color can be added. In addition to this, the degree of freedom of the additional color is higher than that of the first protective cover 15 and the appearance can be improved. Further, the first protective cover 15 and the second protective cover 16 are double-structured, and a space portion 4 8 is formed between the first protective cover 15 and the second protective cover 16 and can be vented from the vent hole 3 9 The heat in the space 48 is discharged into the atmosphere -15-(13) 1304111, so that the space portion 48 can be ventilated, and the heat does not close the space 48, and the surface temperature of the second protective cover 16 can be prevented. In addition, the space portion 48 is connected to the space f by the through hole 56, so that the hot air of the space portion 57 can be discharged from the vent hole 39 to the atmosphere through the through hole 56 and the space. . Therefore, the temperature of the surface of the first shroud 15 and the second shroud 16 can be prevented from rising. Since the first protective cover 15 is protected by the rubber fixing member 43, the anti-shock support can be performed, and the heat-insulating mounting between the retaining bracket 3 3 and the second protective cover 16 can be achieved. It is possible to prevent the temperature of the first shroud 15 from rising and to achieve shockproof mounting. Further, since the second protective cover 16 can be coupled to the protective cover 15 by the bolts 34, it can be easily mounted. In addition, the joint portion formed by the plug 34 is separated from the muffler main body portion 30 so that heat is not directly transmitted from the muffler main body portion 30 to the second fuse 16, and the second protection can be prevented. The surface temperature of the cover 16 rises. The present invention is not limited to the above embodiment, and various shapes and applications are possible. For example, the muffler cover does not have to be a double construction and may be a single construction. In this case, by forming the muffler protective cover with a polycarbonate resin transparent resin, the surface can be made shiny, so that the appearance of the metallic feeling or the transparent coating can be obtained, and the appearance can be obtained, and the appearance can be improved. The appearance of the resin muffler cover. Further, when the above-described opaque layer is formed on the back surface of the muffler cover made of a transparent resin having a single structure, the same effect of improving the appearance can be obtained. And in addition to being an opaque treatment layer in the empty juice. The 57 parts of the 48 are attached to the shield, and the cover is changed to the first snail. The cover is changed, and the surface is also protected. The advanced device can also be plated in addition to the above-mentioned coating-16-(14) 1304111. , or stack other colored materials together in a sticky manner. Thereby, by using the properties of a resin which is easy to add color such as a polycarbonate resin, various opaque treatment layers can be formed, and the degree of freedom in forming the opaque treatment layer can be improved. In addition, if chrome plating treatment or metal coating treatment is performed as the opaque treatment layer, the opaque treatment layer can perform good heat reflection, thereby preventing the surface temperature of the muffler protective cover from rising. © However, it is not necessary to set the opaque processing layer. If the opaque treatment layer is not provided, the muffler cover will become transparent, and the effect of the contour will be obtained by penetrating the muffler on the lower side. For the formation of the opaque treatment layer described above, a muffler protective cover of a single structure and a second protective cover of a double-reconstructed muffler protective cover can be applied. As the resin of the muffler protective cover, the heat resistant resin is not limited to a polypropylene resin to which glass fibers are added, and other resins having the same effects in heat resistance can be used. Similarly, the transparent resin is not limited to the polycarbonate resin, and other resins having excellent transparency can also be used. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a right side view of a Scooter type locomotive to which a muffler of the present invention is applied. Fig. 2 is a side view showing an enlarged portion of the muffler. Fig. 3 is a 2-3 line cross section showing Fig. 2; Figure 4 is a 4-to-4 line cross-section showing Figure 2. Figure 5 is the 5 - 5 line section of Figure 2. -17- (15) 1304111 Fig. 6 is a side elevational view of the first protective cover. Figure 7 is a side elevational view of the second protective cover. Fig. 8 is a sectional view taken along line 8-8 of Fig. 7. Fig. 9 is a 9-line cross section showing Fig. 7. The first drawing is an explanatory view of the mounting operation of the clamp nut. Figure 11 is a top view of the muffler. Figure 12 is a view showing the muffler from the front. [Main component symbol description] 8 : Swing power unit 1 2 : Exhaust pipe 1 3 : Silencer 14 : Silencer bracket 1 5 : First protective cover 16 : Second protective cover • 3 0 : Silencer main body 3 3: Protective cover bracket 3 4 : Bolt 3 9 : Ventilation hole 42 : Bolt 43 : Rubber fixing member 4 7 : Mounting recess 4 8 : Space portion 5 0 : Clamping nut -18- (16) 1304111 5 3 : Mounting seat Part 5 6 : Through Hole 5 7 : Space Department
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