503136 A7 ^____B7____ 五、發明說明（f ) [技術領域] 本發明係有關使用於沖壓機之光線式安全裝置之位置 設定方法及該設定裝置。 [習知技術] 現有在沖壓機本體之左右側面具有側面視呈C形之側 面機架的沖壓機，作爲小型且具泛用性之沖壓機，廣泛地 使用於沖壓加工作業，爲確保作業員之安全，通常在沖壓 機前部具備光線式安全裝置7。圖16，係該種沖壓機械之 立體圖。圖中，在具有側面機架la之沖壓機1下部設有模 枕2，在模枕2上面安裝下模3。又，在沖壓機1之上部， 且模枕2之上方滑件4被設成能上下動，在滑件4之下面 安裝上模5於對向下模3之位置。‘ 如上述之沖壓機1，通常，爲由作業員進行單機加工 ，使用各種模具來操作。如圖16所示，係將上模5與下模 3間之空間作爲作業區域。通常，作業員係從沖壓機1之 前面搬入或搬出材料或加工件。因此，在前面入口處，安 裝有由相面對之左右一對之投光器7a與受光器7b所構成 的光線式安全裝置7。 光線式安全裝置7，形成從投光器7a向受光器7b發 光複數之光軸7c所構成之光線幕，藉作業員之手等身體之 一部分遮住光軸7c之任何一條軸，來偵測是否已侵入前述 作業區域6。當未圖示之控制器輸入光線式安全裝置7之 該偵測訊號時，若滑件4仍在動作中，即使滑件4緊急停 3 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ———Γ I I.-------------訂---------線· (請先閱讀背面之注意事項再填寫本頁) 503136 A7 ------- —_ B7_____ 五、發明說明（/ ) 止以防止事故發生。 使用光線式安全裝置7之沖壓機1，如圖17所示，需 將從光線式安全裝置7之光線幕之面至作業區域6之交界( 通常，係滑件4之前面)之距離，設定爲安全距離Dp。該 安全距離Dp，係表示例如作業員之手等侵入物遮住光線幕 時，在侵入物尙未抵達作業區域6之前，用以使滑件4緊 急停止所需之安全作業上的最小距離，_常‘，係設定於： 根據該沖壓機1緊急停止所需之最大時間，與既定之進入 物最大速度値(通常係作業員之手在動時之最大速度）的積 所求出之距離。 [發明欲解決之課題] ， 然而，上述習知之光線式安全裝眞7之安裝位置設定 時，有如下之問題。 不論模具3, 5之尺寸大小如何，已固定光線式安全裝 置7之安裝位置，亦即係將從光線幕之面至滑件4前面之 距離，設定成爲與每一沖壓機預先決定之一定之安全距離 Dp相等。因此，若所安裝之模具3, 5之尺寸較小時，從光 線式安全裝置7至模具3, 5之前面之距離，將變得較所需 程度爲大(亦即安全距離Dp以上），使該模具使用中之靠近 作業欠佳，有降低作業效果之問題。又，若模具3, 5之尺 寸超過滑件4之前面程度時，從光線幕之面至模具3, 5前 面之距離即變得較安全距離Dp小，安全作業上之管理困 難。如上所述，因光線式安全裝置7未對應模具之尺寸設 4 --I.---.-------------訂---------線 0^1 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公楚） 503136 A7 _____B7___ 五、發明說明（）） 定在適當之位置(亦即確保安全距離Dp之位置），產生不方 便。 (請先閱讀背面之注意事項再填寫本頁) 本發明，係著眼於上述之問題點而開發者，提供能視 模具尺寸確保適當安全距離的光線式安全裝置之位置設定 方法及該設定裝置。 [用以解決課題之手段、作用及效果] 爲達成上述目的，第1發明，係一種光線式安全裝置 之位置設定方法，其特徵在於：以扭點偵測器求出每一模 具之模具前面位置，移動光線式安全裝置進行位置設定， 以在從所求得之模具前面位置相隔既定安全距離之位置， 形成光線式安全裝置之光線幕。 又，第5發明，係一種光線式安全裝置之位置設定裝 置’其特徵在於，具備： 光線式安全裝置，係以能前後移動自如之方式左右一 對分別設於沖壓機之左右側面部，以光線幕偵測侵入模具 作業區域之侵入物； 扭點偵測器，係用以ti測模具前面之扭點；以及 控制器，係求出光線式安全裝置之位置並予以設定， 以在從扭點偵測器所偵測之扭點相隔既定安全距離之位置 ，形成光線式安全裝置之光線幕。 根據第1或第5發明，由於係以扭點偵測器偵測每一 模具，在從求得之扭點位置確保安全距離之位置處，設定 光線式安全裝置，因此無論模具尺寸大小如何，皆能在對 5 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 503136 A7 __B7 ______ 五、發明說明（令） 應模具之適當位置設定光線式安全裝置/藉此，即使是小 模具時亦能因近接作業變佳而提高作業性，亦能減輕作業 員之疲勞，此外，即使是大模具時亦能確實確保安全性。 第2發明，係一種光線式安全裝置之位置設定方法， 其特徵在於：根據安裝在沖壓機之模具的模具尺寸數據求 出前述模具之前面位置，移動光線式安全裝置進行位置設 定，以在從求得之模具前面位置相隔既定安全距離之位置 處，形成光線式安全裝置之光線幕。 第2發明，係根據模具數據，求出每一模具之扭點位 置，在從求得之扭點位置確保安全距離之位置，設定光線 式安全裝置，因此，不論模具尺寸大小如何，近接作業變 佳而能提高作業性及安全性，亦能減輕作業員之疲勞。 第3發明，係根據第1或第2發明，以對應模具所求 出之前述模具前面位置爲基準，顯示至光線式安全裝置之 位置設定之距離的方法。 又第6發明，係根據第5發明，具備··偵測光線式安 全裝置之前後移動位置的安全裝置位置偵測器；及顯示安 全裝置位置偵測器所偵測乏位置的顯示器。 根據第3或第6發明，由於係藉顯示從偵測之模具 前面（扭點）位置至光線式安全裝置之位置設定之距離，使 作業員能確認已確保安全距離，故作業員能安心進行作業 ，而能減輕作業員之疲勞。又，以手動進行位置設定時， 因看著距離顯示而以手動能進行位置設定，故手動之操作 性良好。 6 --丨 — I----------- - ---訂-------- (請先83讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 503136 A7 ___ B7___ _ 五、發明說明（< ) 第4發明，係一種光線式安全裝置之位置設定方法， 其特徵在於：於前後方向移動具有既定長度之安全距離設 定治具，將其一端側之前端部抵接於沖壓機之模具前面， 接著移動光線式安全裝置進行位置設定，以在從所抵接之 安全距離設定治具之另一端側之規定位置，且從一端側之 前端隔離既定之安全距離處，形成光線式安全裝置之光線 慕0 -τττ^ 又，第7發明，係一種光線式安全裝置之位置設定裝 置，其特徵在於，具備： 光線式安全裝置，係以能前後移動自如之方式左右一 對分別設於沖壓機之左右側面部，以光線幕偵測侵入模具 作業區域之侵入物；以及 ， 安全距離設疋治具，係被設定成其一端側，與光線式 安全裝置一起安裝於設置成前後移動自如之構件，藉另一 端側之前端部抵接於模具前面，使從模具前面之扭點至光 線式安全裝置之光線幕之距離確保既定之安全距離。 根據第4或第7發明，由於係使用安全距離設定治具( 具有易設定安全距離之既定長度的距離間隔件或尺等，視 模具尺寸測定確保安全距離之位置，在該位置設定光線式 安全裝置，因此無論模具尺寸之大小皆能將光線式安全裝 置設定於適當位置。因此，即使是小模具時亦會因近接作 業變佳使作業性提高，又即使是大模具時亦能確實確保安 全性。又，由於僅將安全距離設定治具之一端抵接於模具 之扭點，即能簡單地將光線式安全裝置設定於確保安全距 7 --------------------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 503136 A7 _____B7_____ 五、發明說明（卩） 離之位置，故設定作業容易。 [圖式之簡單說明] 圖1，係本發明之扭點及安全距離的說明圖。 圖2,係具備第1實施形態之位置設定裝置之沖壓機 的前視圖。 圖3，係具備第1實施形態之位置設定裝置之沖壓機 的右側視圖。 圖4,係前後移動自如之光線式安全裝置之裝設構造 的說明圖。 圖5，係第1實施形態之扭點偵測器的說明圖。 圖6，係第2實施形態之位置設定裝置的說明圖。 圖7，係顯示第2實施形態之位置設定方法的流程圖 例。 圖8，係具備第3實施形態之位置設定裝置之沖壓機 的前視圖。 圖9，係具備第3實施形態之位置設定裝置之沖壓機 的右側視圖。 ί 圖10，係第4實施形態之位置設定裝置的機能方塊圖 〇 圖11，係第5實施形態之位置設定裝置的要部俯視圖 〇 圖12，係圖11之A-A線截面圖。 圖13，係圖12之B-B線截面圖。 8 ^纸張尺度適用中國國家標準(CNS)A4規格（210 x 297公釐〉^ —I.---'-----------------------^ (請先閱讀背面之注意事項再填寫本頁) 503136 A7 B7 五、發明說明（7 圖14，係圖11之C-C線截面圖。 圖15，係顯示第5實施形態之位置設定方法的流程圖 <請先閱讀背面之注意事項再填寫本頁) 例。 圖16，具備習知技術相關之光線式安全裝置之沖壓機 的立體圖。 圖17，係習知之沖壓機之安全距離的說明圖。 [符號說明] 1 沖壓機 2 模枕 3 下模 4 滑件， 5 上模： 6 作業區域 7, 45 光線式安全裝置 7a，41c 投光器 7b，41d 受光器 8 ’ 扭點 10 開口部 11，16, 21，33, 34, 42 夾持具 14 滾珠螺桿 15 導桿 17 驅動馬達 18 安全裝置位置偵測器 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 503136 A7 B7 五、發明說明（f ) 22 23 24, 27, 44 25 26 28 30 31 32, 37 35 38 39 40 41, 46 51 52 53 54 58 支承件 齒條 小齒輪 夾緊具 定位裝置 電磁制動器 距離間隔件 桿 滾子 銷 水平感測器 燈， 控制器i 扭點偵測器 ID號碼輸入部 扭點位置演算部 模組數據存儲部 移動控制部 顯示器 連結構件 61，62 [發明之實施形態] 以下，參照圖式詳細說明實施形態。 首先，參照圖1，說明本發明之扭點及安全距離的想 10 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 503136 A7 _____B7 __ 五、發明說明（1 ) 法。實際作業中，上模5與上模3所夾之空間爲作業區域 ，如圖1所示，上模5與上模3密合後之狀態下，將作爲 前述作業區域之交界之上下模具3, 5的前端面之位置，稱 爲所謂之扭點(pinch P〇int)8。本發明，係在該扭點8與光 線幕(係以前後方向移動自如之投光器7a及受光器7b所形 成)之距離，對應模具、沖壓機可確保爲安全距離Dp之位 置，設定光線式安全裝置7。 首先，以圖2〜5，說明第1實施形態之光線式安全裝 置之位置設定裝置。圖2，係具備本實施形態之位置設定 裝置之沖壓機的前視圖，圖3，係其側視圖。以下，對與 圖16相同之構成要件使用相同符號，省略其說明。 光線式安全裝置7之投光器7a及受光器7b，係互相 面對設在沖壓機1之前面左右，安裝成於沖壓機1之前後 方向移動自如。亦即，在沖壓機1之左右側面機架la，la 所設之各開口部10之下部，藉機架裝設部16a安裝機架 16，在機架16於前後方向安裝有滾珠螺桿14與導桿15。 在各滾珠螺桿14與導桿15上，分別將夾持具11安裝成於 前後方向移動自如。在左;fe—對之夾持具11，11上面，分 別安裝有投光器7a及受光器7b。又，驅動馬達17之輸出 軸連結在各滾珠螺桿14之一端側，在另一端側安裝偵測光 線式安全裝置7之位置(例如以編碼器所構成）的安全裝置 位置偵測器18。又，投光器7a及受光器7b亦可安裝爲左 右相反。 接著，以圖4詳細說明光線式安全裝置7之安裝構造 11 t氏張尺度適用中ί國家標準（CNS)A4規格（210 X 297公釐）""""""" ~ ~ ΙΙΙΓΙΚ----------!——訂---------線· (請先閱讀背面之注意事項再填寫本頁) 503136 A7 ____B7____ 五、發明說明（丨〇 ) 。該圖係面對沖壓機1安裝於左側面之投光器7a的安裝側 視圖。 其上面安裝有投光器7a(受光器7b亦同）之夾持具U ，形成有貫穿於前後方向之孔14a與孔15a，於孔14a中 嵌插與滾珠螺桿14卡合之螺帽12，在孔15a內設有插通 導桿15之導件13。滾珠螺桿14係旋轉自如地安裝於機架 16，導桿15係與滾珠螺桿14平行安裝於機架16。此外， 機架16係藉機架裝設部16a安裝於側面機架la。又，安 裝於機架16之驅動馬達17之輸出軸，係與滾珠螺桿14之 一端部連結，以該驅動馬達17之正轉，反轉來旋轉滾珠螺 桿I4，透過夾持具11使投光器7a(受光器7b亦同樣)於前 後方向移動自如。夾持具11，係以導件13之內周面爲引 導沿導桿15滑動。驅動馬達17之控制訊號係從控制器40 輸出。 又，作爲移動夾持具11於前後方向之機構，雖使用滾 珠螺桿與驅動馬達，但亦可藉利用空氣壓或油壓之氣缸等 機構。又，亦可連結左右不同之驅動部，以任一側之驅動 馬達加以驅動。 / 在滾珠螺桿14之另一端部，連結以滾珠螺桿14之旋 轉偵測投光器7a及受光器7b之移動位置(例如以編碼器所 構成)的安全裝置位置偵測器18之輸入軸，安全裝置位置 偵測器18本體安裝於機架16。安全裝置位置偵測器18將 所偵測之位置訊號輸出至控制器40。 又，控制器40具有顯示器58，用以監測顯示各模具 12 本紙張尺度適用中國國家標準（CNS)A4規格（210 x 297公釐） -----I----丨裝·-------訂--------線 (請先閱讀背面之注意事項再填寫本頁) 503136 A7 _____B7 _ 五、發明說明（〖丨） 之尺寸數據，對各模具所求得之光線式安全裝置7之位置 設定，或距光線式安全裝置7之扭點之距離、實際移動位 pgq. Asfr 置寺〇 又，在沖壓機1之側面機架la(在圖3，係從後方面向 前方之左側）之開口部10,配設扭點偵測器41之受光器 41d(光軸爲水平方向），該受光器41d以夾持具42安裝於 側面機架la之開口部10上方。又，扭點偵測器41之投光 器41c，係安裝於面對受光器41d在相反側之側面機架(此 處，係右側）。該等投光器41c與受光器41d，具有在水平 方向以既定間隔所配列之複數條光軸，各光軸之遮光訊號 輸入未圖示之控制器40。 其次，說明如上述之構成之作用。 圖5，係顯示使滑件4下降，以士模5將扭點偵測器 41之複數光軸之一部分加以遮光的狀態。藉投光器41c與 受光器41d，於側面視在從模枕2前後方向之中心Μ至超 越模枕2之前面2a之位置間，以既定間隔形成複數之光軸 於前後方向。該複數條光軸上下方向之位置，係設定在裝 模高度之大致中央。 ， 如上述構成之光線式安全裝置之位置設定步驟，如下 〇 首先，交換模具後，使滑件4上升至上死點位置。使 扭點偵測器41動作以投光器41c與受光器4ld形成複數條 光軸後，使已裝妥上模5之滑件4下降。 如圖5所示，設將扭點偵測器41之複數條光軸從滑件 13 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --·--丨-------裝--------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 503136 A7 ___B7_ 五、發明說明（) 4之前面側依序訂出號碼①，②，③，④，⑤，⑥，該圖中號碼⑤ 以上之光軸係被遮光。控制器40根據輸入遮光訊號，偵測 出未遮光之光軸爲①至④，判斷交換後模具之扭點在④之位 置。控制器4〇以求出之該扭點爲基準，移動光線式安全裝 置7之投光器7a及受光器7b至同一位置以確保安全距離 Dp，之後使光線式安全裝置7動作。此時，光線式安全裝 置7距扭點之距離、實際之移動位置等顯示於顯示器58， 由作業員加以確認。因此，光線式安全裝置7之光線幕與 扭點之距離即確實設定在安全距離Dp。 據此，光線式安全裝置7之光線幕與模具前面之距離 ，無論模具尺寸之大小皆可視模具尺寸確保安全距離Dp。 其結果，就同一沖壓機而言，即使是小模具其近接作業亦 變佳，提高作業性及安全性，亦能減輕作業員之疲勞，且 即使是大模具時亦能確實地確保安全距離，進行安全作業 〇 此外，由於顯示了目前光線式安全裝置7對應模具距 扭點之距離及實際移動位置，確保安全距離之狀態等，因 此作業員能容易地確認已’確保安全距離，安心地進行作業 〇 其次，根據圖6及圖7說明第2實施形態。 本實施形態之硬體構成，係不具備第1實施形態之扭 點偵測器41之構成。亦即，如圖6所示，光線式安全裝置 45，具有設於滑件4左右之一對具有複數條光軸之投光器 7a及受光器7b，投光器7a及受光器7b係介藉驅動馬達 14 本紙張尺度適用中國國家標準（CNS)A4規格（21〇 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) .裝 訂---------線 503136 A7 _ B7_ 五、發明說明（θ ) 17透過滾珠螺桿14於前後方向移動自如。本實施形態之 光線式安全裝置45，除通常之安全裝置之機能外，亦具有 扭點偵測器之機能。亦即，光線式安全裝置45之各光軸之 遮光訊號分別輸入控制器40，控制器40即根據該輸入之 各光軸之遮光訊號判斷扭點。 其次，以圖7說明本實施形態之光線式安全裝置之位 置設定方法。於步驟S1拆除模具後，爲將光線式安全裝置 45設置在對應模具之安全距離Dp之位置，先將光線式安 全裝置45移動至原點位置。又，作業員藉設置於未圖示之 操作盤之燈顯示等，來確認原點位置恢復動作已完成。其 次，於步驟S2交換模具。之後，於步驟S3，當控制器40 輸入既定之模具交換結束訊號後，即一邊偵測各個以投光 器7a及受光器7b形成之複數條光軸之遮光，一邊使光線 式安全裝置45從前述原點位置向模具方向移動(向後方）。 又，此移動亦可藉控制器40之自動控制進行，或亦可使用 裝設在手動操作盤之前進用或後退用之按鈕式開關等進行 手動操作。 之後，於步驟S4，以安全裝置位置偵測器18偵測全 部光軸最初被遮光之光線式安全裝置45之位置45a(亦即， 全光軸遮光範圍之前端位置），判斷該偵測之位置爲扭點。 於步驟S5，控制器40根據預先設定之既定安全距離Dp數 據、及前述偵測之扭點位置，演算對應該扭點位置之確保 安全距離Dp之位置，輸出驅動馬達Π之驅動指令，以使 光線式安全裝置45移動至該求出之位置。據此，於步驟 15 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --：--------—--------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 刈 3136 A7 1〜__B7_____ i、發明說明（4) S6，使光線式安全裝置45向前方移動，在距前述扭點確保 安全距離Dp之位置處停止，以定位於此。之後，於步驟 S7 ’使光線式安全裝置45動作而形成光線幕，步驟S8， 進行沖壓機運轉之準備處理及其後之實際動作。 因此，光線式安全裝置45之光線幕與模具前面之距離 ’無論模具尺寸之大小，皆能視模具尺寸確保安全距離Dp 。其結果，就同一沖壓機而言，即使是小模具其近接作業 亦變佳，提高作業性及安全性，亦能減輕作業員之疲勞， 且在大模具時能確實確保安全距離Dp，提高安全性。 接著，根據圖8及圖9說明第3實施形態。 圖8,係具備本實施形態之位置設定裝置之沖壓機的 前視圖，圖9係其側視圖。此處，對與圖2相同之構成要 件係賦予相同符號，並省略其說明。‘ 在沖壓機1之正面大致中央部支持爲上下動自如之扭 點偵測器46，係安裝於桿47之下部，該桿47係藉設置於 沖壓機1之前面上部之夾持具48導引。在桿47之外面設 置齒條47r，在前述夾持具48之上部將與齒條471：嚙合之 小齒輪49設置成旋轉自命。小齒輪49之軸部連結於馬達 59之輸出軸，藉馬達59之旋轉透過小齒輪49及齒條47ι· 使扭點偵測器46上下動。扭點偵測器46係例如使用雷射 光之非接觸式距離感測器構成，將從上死點之滑件4下面 位置至模枕2之上面位置之範圍設定爲能上下動之掃描範 圍。扭點偵測器46偵測之距離數據輸入控制器40。又， 在馬達59之輸出軸安裝例如以編碼器構成之掃描位置感測 16 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) '------丨—訂 * ------丨· 503136 A7 一^ ----^-- 五、發明說明（、< ) 器59a，掃描位置感測器59a之位置訊號輸入控制器40。 其次，說明本實施形態之作用。 控制器40，係驅動馬達59 ’使扭點偵測器46 —邊從 前述掃描範圍之一端側(例如滑件下面位置）移動至另一端 側，一邊掃描上下模具之前面’偵測在上模5及下模3組 合狀態下之至模具前面之距離與對應其數據之掃描位置(高 度數據），根據該偵測數據求出模具前面之形狀與距既定基 準位置之距離，又，將該等數據顯示於顯示器58。又，根 據該等數據將模具前面之位置偵測爲扭點。其次，控制器 4〇移動光線式安全裝置7 ’使從前述偵測之扭點至光線式 安全裝置7之光線幕的距離與安全距離Dp相等。 藉此，即能進行對應模具尺寸之扭點之偵測，因光線 式安全裝置7能從該偵測之扭點設定至確保安全距離Dp 之位置，故不論模具尺寸之大小皆能將光線式安全裝置7 設定在適當位置，更能提高作業性及安全性。 又，由於能藉扭點偵測器46偵測對應模具形狀之扭點 ，故能不受模具形狀之影響、確保精度良好之安全距離。 其次，以圖1〇說明桌4實施形態。本實施形態之硬體 構成與在第2實施形態圖6所示之構成相同，此處省略其 說明。 下模3與上模5係以一對作模組管理及保管，在各模 組附加ID號碼，以便能辨別成對之上下模具之尺寸數據， 成形品名稱及沖壓加工條件等之模組數據。控制器40，具 備對應各ID號碼存儲各模組數據之存儲器，及用以輸入下 17 --------------------訂—I------線 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 503136 A7 ^____B7___ 五、發明說明（J ) 一組模具之ID號碼所用之ID號碼輸入部。 圖10，係本實施形態之光線式安全裝置之位置設定裝 置的機能方塊圖，以該圖說明各機能。 ID號碼輸入部51，係更換模具時用以輸入下一個欲 安裝之模組之ID號碼。ID號碼輸入部51，亦可例如具有 ID號碼之設定開關、登錄開關及確認顯示器等之操作輸入 機構，亦可是從外部其他控制裝置以通訊等輸入數據之機 構。模組數據存儲部53，係將所有使用模組之每一模組數 據對應ID號碼加以記憶。又，各模組數據，已預先設定對 應ID號碼之下模與上模之模具尺寸。 扭點位置演算部52，將對應從ID號碼輸入部51輸入 之ID號碼之模組數據中之模具尺寸數據，從模組數據存儲 部53讀取後，根據該模具尺寸數據，>演算模具前面之尺寸 及從基準位置至前面之位置，從演算之形狀數據求出扭點 之位置。而後，從求出之扭點位置算出確保安全距離Dp 之光線式安全裝置7之位置，輸出朝該位置移動之指令給 移動控制部54。 移動控制部54，以妄全裝置位置偵測器18, 18邊監視 投光器7a及受光器7b之各位置邊控制驅動馬達17, 17， 使投光器7a及受光器7b移動至上述移動指令之位置。 其次，說明本實施形態之作用。以ID號碼輸入部51 輸入下一個欲安裝之上下模具之ID號碼。對應輸入之ID 號碼之模具尺寸數據，從模組數據存儲部53讀出，根據該 模具尺寸數據，以扭點位置演算部52求出該模具之扭點位 18 本紙張尺度適用中國國家標準（CNS)A4規格（21〇 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) -n mm§ SI an n n^-OJ· n n I n n Is Kn I , 503136 A7 ___B7 _ 五、發明說明（（Ί ) 置及用以確保安全距離dp之光線式安全裝置7之位置， 以移動控制部54控制光線式安全裝置7定位於前述所求之 位置。 又，雖舉出作爲模組數據，預先存儲模具尺寸，根據 該模具尺寸算出從扭點位置至確保安全距離Dp之光線式 安全裝置7之位置的例，然而不限定於此，亦可預先求出 對應各模具尺寸確保既定之安全距離Dp所必要之光線式 安全裝置7之位置數據而預先加以記憶，根據所記憶之位 置數據來控制光線式安全裝置7之位置。 根據上述之本實施形態，光線式安全裝置7與扭點之 距離，不論模具尺寸之大小，皆能視模具尺寸確保安全距 離Dp。因此，就同一沖壓機而言，，即使是小模具其近接作 業亦變佳，提高作業性及安全性，亦能減輕作業員之疲勞 。又，即使是大模具時，亦能確實地確保安全距離Dp。 其次，說明第5實施形態。圖11，係第5實施形態之 位置設定裝置的主要部位俯視圖，圖12係圖11之A-A線 截面圖，圖13係圖12之B-B線截面圖、圖14係圖11之 C-C線截面圖。 / 與受光器7b互相面對之投光器7a，係安裝於夾持具 21之上部(該挾持具21，具有剖面呈T字形之突出部21a 於下端部）。在分別裝設於模枕2之左右側面下方之側面機 架la，la的支承件22, 22之上面，將剖面T字形之槽22a 設置於前後方向，前述夾持具21係將T字形之突出部 21a滑動自如地卡合於前述T字形之槽22a而加以支撐。 19 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐〉 (請先閱讀背面之注意事項再填寫本頁) I 1 訂·-------I . 503136 A7 ______B7_ 五、發明說明（β ) 又，在夾持具21之側面安裝小齒輪軸2如，在小齒輪軸 24a旋轉自如地安裝小齒輪24。在支承件22上面之前述槽 22a側方，設置齒條23於前後方向使與小齒輪24嚙合。 又，在與小齒輪24相反側之夾持具21之側面安裝夾緊具 25，裝設在夾緊具25之把手25a，係連結於內裝之未圖示 的鎖止機構(例如藉轉動推壓支承件22之上面使之鎖止自 如的機構）。又，投光器7a及受光器7b之配置亦可與上述 相反。 在投光器7a及受光器7b之兩上部間與兩下部間，分 別以連結構件61及連結構件62加以連結，使投光器7a及 受光器7b能在互相面對之狀態下前後移動。 欲將投光器7a及受光器7b移動於前後方向時，以手 動操作左右之夾緊具25之把手25a解放鎖止機構，藉手動 操作使投光器7a及受光器7b於前後方向移動。然後，於 期望之位置，以手動操作把手25a鎖止前後移動，將夾持 具21固定於支承件22。 定位裝置26係安裝在支承件22之上部。定位裝置26 之下部具有T字形之突起、6a。在支撐該定位裝置26之支 承件22之上面，於前後方向設置T字形之槽22a，與前述 疋ίϋ裝置26之T字形之突起26a卡合。 在定位裝置26之側面配設小齒輪27，使小齒輪27嚙 合設在支承件22之上面之齒條23，該小齒輪27，固裝於 小齒輪軸27a。小齒輪軸27a係連結於電磁制動器28(係固 裝於與插通定位裝置26之孔26b、配置定位裝置26之小 20 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ------------.—丨丨—訂-—丨丨— (請先閱讀背面之注意事項再填寫本頁) 503136 A7 —__B7 _____ 五、發明說明（ 齒輪27之側面相反側的側面）。藉對電磁制動器28進行勵 磁來固定小齒輪軸27a，藉對小齒輪軸27a進行解磁即能 旋轉。 夾持具21上於前後方向設有貫通孔21c，插通於該貫 通孔21c之附頭軸29之前端部，係連結於定位裝置26。 在該附頭軸29之頭部與夾持具21之間裝設彈簧29a，定 位裝置26被彈簧29a彈壓而被拉向附頭軸29之頭部方向 〇 在構成距離間隔件30之桿31之前端部，將滾子32 支撐爲旋轉自如之夾持具33,係安裝成於前後方向移動自 如，夾持具33被桿31前端部所裝設之彈簧31a彈壓向前 方。在桿31之前端部、且爲夾持具33之後退端，設有偵 測夾持具33係位在後端之近接開關等之抵接感測器31b， 抵接感測器31b係當滾子32之外周部抵接於模具之前端面 (即扭點之候補點）時輸出抵接訊號。又，在距離間隔件30 之上面，裝設根據抵接感測器31b之抵接訊號點亮之燈39 。又，燈39，亦可例如裝設於操作盤(未圖示)上。桿31之 另一端側，以夾持具34美銷35連結，桿31以銷35爲中 心於上下方向搖動自如。在夾持具34設置貫通孔34a於上 下方向，導桿36插通於該貫通孔34a。設置於導桿36之 上端部之滾子37,係左右移動自如地插入在設置於連結左 右之投光器7a及受光器7b之兩上部間之連結構件61的T 字形之槽61a內。又，導桿36之下端部’係以左右移動自 如之方式插入連結構件62所設之槽62a內(連結構件62， 21 ---I I I 1 I 丨 I I .丨丨丨丨丨丨丨 -----I I (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 503136 A7 _ 一一-…— _ B7___ _ -- 五、發明說明（/) 係用以連結左右之投光器7a及受光器7b之兩下部間）。導 桿36之下端部在移動方向具有既定長度之寬廣部，導桿 36在前述連結構件61之槽61a內移動左右時，藉前述下 端部之寬廣部抵接於槽62a內，抑制導桿36之滾子37周 圍之旋轉，使導桿36之姿勢保持垂直。又，在夾持具34 之上部安裝極限開關等之水平感測器38，藉水平感測器38 偵測桿31之水平狀態。 上述抵接感測器31b及水平感測器38之偵測訊號’ 輸入控制器40，從控制器40輸出燈39及電磁制動器28 之動作訊號。 此處，如圖12所示，距離間隔件30之長度，係設定 成光線式安全裝置7之光線幕與呈水平狀態之桿31之滾子 32之外周部前端部的距離，等於安全距離Dp之長度。 其次，說明上述構成之作用。 根據圖15，說明本發明之光線式安全裝置之位置設定 方法。 於步驟S11，作業結束後，解除光線式安全裝置之投 光器7a及受光器7b之夾/緊具25之把手25a。其次，於步 驟S12，使距離間隔件30爲水平狀態，解放定位裝置26 之電磁制動器28。藉此，於步驟S13，定位裝置26被彈簧 29a之彈壓力拉至附頭軸29之頭部方向，光線式安全裝置 7之投光器7a及受光器7b則後退。而且，於步驟s 14，將 上下模具交換爲下一個欲成形之模具時，輸入模具交換訊 號，判斷模具已交換，暫時重設之前輸入光線式安全裝置 22 本紙張尺度適i中國國家標準（CNS)A4規格（210 X 297公釐） ' " 〜 ------------*-------^------—^ (請先閲讀背面之注意事項再填寫本頁) 503136 A7 ______B7 _ 五、發明說明（>1) 7之位置設定數據。又，前述模具交換訊號，亦可藉例如 裝設上模時所偵測之上模偵測訊號或模具夾緊結束訊號等 加以偵測。此時，滑件停止於下死點近旁，使下模與上模 組合呈緊接狀態。於步驟S15，使距離間隔件30爲水平狀 態保持著水平’使光線式安全裝置7之投光器7a及受光器 7b —起前進。 而後，於步驟S16，使距離間隔件30之滾子32之外 周面抵接於模具之扭點’以燈39確認感測器31b所偵測之 扭點抵接訊號。此時，定位裝置26之位置，係確保安全距 離Dp之光線式安全裝置7之設定位置。於步驟S17，使距 離間隔件30倒成垂直狀態，控制器40根據水平感測器38 之水平訊號爲關閉(off)，使電磁制動器28動作，以鎖止定 位裝置26之位置。成爲垂直之距離間隔件30，即沿連結 構件61，62移動至沖壓機1之左端部或右端部。又，該狀 態下，光線式安全裝置7雖無法移動至較前述設定位置、 亦即定位裝置26之鎖緊位置靠近沖壓機1側，然而因可向 與沖壓機1之相反側移動自如，故若要光線式安全裝置7 設置於較前述設定位置安—側時，則係使投光器7a及受光 器7b進一步朝附頭軸29之頭部方向後退。然後，於步驟 S18，藉夾緊具25之把手25a之操作鎖止投光器7a及受光 器7b。而後，於步驟S19，使光線式安全裝置7動作形成 光線幕，於步驟S20，進行運轉沖壓機所需之準備處理。 又，在上述流程圖’步驟S14亦可於步驟11〜13之 任何步驟前進行。 23 尺度適用中國國家標準(CNS)A4規格（210 X 297公釐) 一 " ' ----------------I-----------線 (請先閱讀背面之注意事項再填寫本頁) 503136 A7 __B7_ 五、發明說明（〆） 如上所述，因將距離間隔件30抵接於模具之扭點來設 定安全距離Dp，故光線式安全裝置7之光線幕與模具之扭 點之距離，無論模具尺寸之大小，皆能使模具尺寸確保適 當之安全距離Dp。其結果，就同一沖壓機而言，即使是小 模具時近接作業亦變佳，因容易作業，故能提高安全性， 亦能減輕作業員之疲勞，又，使用大模具時，能確實地確 保安全距離，進一步的提高安全性。 又，本實施形態，雖舉使用距離間隔件(係具有既定長 度之安全距離設定治具，能用手動使安全距離Dp之設定 容易進行)之例說明，然而並不限定於此，亦可例如使用設 定爲安全距離Dp之長度之棒或刻度數之尺(刻度尺)等之測 定治具，測定從光線幕之位置至模具前面之距離，來進行 光線式安全裝置7之位置設定。 i 又，本發明，雖就沖壓機之左右側面具有側視呈C字 形狀之沖壓機所使用之光線式安全裝置作了說明，然而並 不限定於此，亦可適用於例如沖壓機之左右側面，將側視 呈C字型形狀之側面機架之開口部上下之兩前端部以機架 之一部或別之構件連結成Μ 〇字型形狀之側面機架之所謂 〇型機架，及設直立之門型機架之沖壓機。 又，雖就以投光器及受光器形成光線幕之光線式安全 裝置之構成作了說明，然而並不限定於此，當然亦可適用 於將投光器及受光器集中於一處，以反射鏡反射光線形成 光線幕之光線式安全裝置。 如以上之說明，根據本發明，由於係針對設置之每一 24 --------------------訂- ---------線 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 503136 A7 _ B7_ 五、發明說明（4) (請先閱讀背面之注意事項再填寫本頁) 鎮具分別求出扭點，從所求得之扭點求出能確保既定之位 置之光線式安全裝置之設定位置來進行位置設定，因此論 模具尺寸之大小如何，皆能將光線式安全裝置設定於適當 之位置。因此，能提高作業性及安全性。又，因以顯示器 監視光線式安全裝置之位置及之安全距離之確保狀況，故 能容易確認己設定在安全距離，能使作業員安心作業。 25 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）503136 A7 ^ ____ B7____ 5. Description of the Invention (f) [Technical Field] The present invention relates to a position setting method of a light-type safety device used in a punching machine and the setting device. [Know-how] Existing presses that have C-shaped side frames on the left and right sides of the main body of the press are widely used as stamping operations as small and versatile presses. To ensure operators For safety, light safety devices 7 are usually provided on the front of the press. Fig. 16 is a perspective view of the punching machine. In the figure, a die pillow 2 is provided at the lower part of the press 1 having a side frame la, and a lower die 3 is mounted on the die pillow 2. In addition, the upper part of the press 1 and the upper slide 4 of the die pillow 2 are provided to be able to move up and down, and the upper die 5 is installed below the slide 4 at a position opposite to the lower die 3. ‘As with the press machine 1 described above, in general, a single machine is performed by an operator, and various molds are used for operation. As shown in Fig. 16, the space between the upper mold 5 and the lower mold 3 is used as the work area. Usually, the operator moves in or out materials or work pieces from the front of the press 1. Therefore, at the front entrance, a light-type safety device 7 composed of a pair of left and right light projectors 7a and a light receiver 7b is installed. The light type safety device 7 forms a light curtain composed of a plurality of light axes 7c that emit light from the light projector 7a to the light receiver 7b, and covers any one of the light axis 7c by a part of the body such as an operator's hand to detect whether it has been Intrude into the aforementioned work area 6. When the controller (not shown) inputs the detection signal of the optical safety device 7, if the slider 4 is still in motion, even if the slider 4 stops urgently 3 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ——— Γ I I .------------- Order --------- line · (Please read the precautions on the back before filling in this page) 503136 A7 ------- --_ B7_____ 5. Description of the invention (/) to prevent accidents. As shown in FIG. 17, the punch 1 using the light safety device 7 needs to set the distance from the surface of the light curtain of the light safety device 7 to the junction of the working area 6 (usually, the front face of the sliding member 4). Is the safety distance Dp. The safety distance Dp indicates the minimum distance required for the safe operation of the slider 4 for emergency stop before the intruding object 抵达 reaches the working area 6 when an intruding object such as an operator's hand covers the light curtain. _Chang 'is set to: the distance obtained from the product of the maximum time required for the emergency stop of the punching machine 1 and the maximum speed of the entered object (usually the maximum speed of the operator's hand when moving) . [Problems to be Solved by the Invention] However, when the installation position of the conventional light-type safety device 7 is set, there are the following problems. Regardless of the size of the molds 3 and 5, the installation position of the light-type safety device 7 has been fixed, that is, the distance from the surface of the light curtain to the front of the slide 4 is set to a certain value determined in advance with each stamping machine. The safety distances Dp are equal. Therefore, if the size of the installed molds 3 and 5 is small, the distance from the light-type safety device 7 to the front face of the molds 3 and 5 will become larger than necessary (that is, the safety distance Dp or more). The close operation during the use of the mold is not good, and there is a problem that the operation effect is reduced. In addition, if the dimensions of the molds 3 and 5 exceed the front surface of the slider 4, the distance from the surface of the light curtain to the front of the molds 3 and 5 becomes smaller than the safety distance Dp, making it difficult to manage safety operations. As mentioned above, because the light-type safety device 7 does not correspond to the size of the mold, 4 --I .---.------------- order --------- line 0 ^ 1 (Please read the precautions on the back before filling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 Gongchu) 503136 A7 _____B7___ 5. Description of the invention () That is to ensure the position of the safety distance Dp), causing inconvenience. (Please read the precautions on the back before filling this page.) The present invention was developed by focusing on the above problems, and provides a position setting method and a setting device for a light-type safety device that can ensure an appropriate safety distance depending on the mold size. [Means, functions, and effects to solve the problem] In order to achieve the above object, the first invention is a position setting method of a light-type safety device, which is characterized in that the front face of each mold is obtained by a twist point detector. Position, move the light-type safety device to set the position to form a light curtain of the light-type safety device at a position separated by a predetermined safety distance from the front position of the obtained mold. The fifth invention is a position setting device of a light-type safety device, which is provided with: a light-type safety device, which is provided on the left and right side portions of the punching machine so as to be able to move forward and backward freely. The light curtain detects intruders intruding into the working area of the mold; the twist point detector is used to measure the twist point in front of the mold; and the controller is to find the position of the light safety device and set it so that the The twisted points detected by the point detector are separated by a predetermined safety distance to form a light curtain of a light-type safety device. According to the first or fifth invention, since each mold is detected by a twist point detector, a light-type safety device is set at a position to ensure a safe distance from the obtained twist point position, so regardless of the size of the mold, Both can apply Chinese National Standard (CNS) A4 specification (210 X 297 mm) to 5 paper sizes. 503136 A7 __B7 ______ 5. Description of the invention (order) The light-type safety device should be set at the appropriate position of the mold. When it is a small mold, it can improve the workability due to the improved proximity operation, and it can reduce the fatigue of the operator. In addition, it can ensure the safety even when the mold is large. The second invention is a position setting method of a light-type safety device, which is characterized in that the position of the front surface of the mold is obtained according to the mold size data of the mold installed in the punching machine, and the light-type safety device is moved to perform position setting to The obtained front position of the mold is separated by a predetermined safety distance to form a light curtain of a light safety device. The second invention is to determine the twist point position of each mold based on the mold data, and to set a light-type safety device at a position to ensure a safe distance from the obtained twist point position. Therefore, regardless of the size of the mold, the proximity operation changes. It can improve workability and safety, and can also reduce operator fatigue. A third invention is a method for displaying a distance to a position setting of a light-type safety device based on the first or second position of the aforementioned mold obtained based on the corresponding mold according to the first or second invention. A sixth invention is based on the fifth invention, and includes a safety device position detector that detects the forward and backward movement positions of the light-type safety device, and a display that displays the lack of position detected by the safety device position detector. According to the third or sixth invention, since the distance set from the position of the front of the mold (torsion point) to the position of the light-type safety device is displayed, the operator can confirm that the safety distance is ensured, so the operator can perform the operation with peace of mind. Work while reducing operator fatigue. In addition, when the position setting is performed manually, the position setting can be performed manually by looking at the distance display, so the manual operability is good. 6-丨-I --------------- Order -------- (Please read the precautions on the back before you fill out this page) This paper size applies to China Standard (CNS) A4 specification (210 X 297 mm) 503136 A7 ___ B7___ _ 5. Description of the invention ( <) The fourth invention is a position setting method for a light-type safety device, which is characterized in that: a safety distance setting jig having a predetermined length is moved in the front-rear direction, and one end side of the front end is abutted against a die of a punching machine On the front, move the light-type safety device to set the position so that the other end side of the jig is set at a predetermined position from the abutted safety distance, and the predetermined safety distance is isolated from the one end side and the front end to form a light-type safety device. The light beam 0-τττ ^ Also, the seventh invention is a position setting device for a light-type safety device, which is characterized by having: a light-type safety device, which is provided on the left and right sides respectively in a way that can move freely forward and backward On the left and right side of the machine, light curtains are used to detect intruders that invade the mold's working area; and the safety distance fixture is set to one end side, and is installed with the light-type safety device to move forward and backward freely. The component is in contact with the front of the mold by the front end of the other end side, so that the twist point from the front of the mold to the light safety device Distance from the line to ensure the safety curtain of the established. According to the 4th or 7th invention, since a safety distance setting jig (a distance spacer or a ruler having a predetermined length for easily setting the safety distance is used, the position of the safety distance is determined according to the measurement of the mold size, and the light type safety is set at the position Device, so the light-type safety device can be set to an appropriate position regardless of the size of the mold. Therefore, even in the case of a small mold, the work can be improved due to the proximity operation, and the safety can be ensured even in the case of a large mold. In addition, since only one end of the safety distance setting jig abuts the twist point of the mold, the light-type safety device can be simply set to ensure the safety distance 7 ------------- ------- Order --------- Line (Please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 503136 A7 _____B7_____ 5. The description of the invention (卩) It is easy to set the position. [Simplified description of the drawing] Fig. 1 is an illustration of the twist point and safety distance of the present invention. Fig. 2 is provided with the first implementation Form position setting device Fig. 3 is a right side view of a punching machine provided with the position setting device of the first embodiment. Fig. 4 is an explanatory diagram of the installation structure of a light-type safety device that can move forward and backward. Fig. 5 is the first An explanatory diagram of the twist point detector of the embodiment. Fig. 6 is an explanatory diagram of a position setting device of the second embodiment. Fig. 7 is a flowchart example showing a position setting method of the second embodiment. Fig. 8 is provided with Front view of a press machine with a position setting device according to a third embodiment. Fig. 9 is a right side view of a press machine with a position setting device according to a third embodiment. Ί Fig. 10 shows the function of the position setting device according to the fourth embodiment. Block diagram 〇 FIG. 11 is a plan view of the main part of the position setting device of the fifth embodiment. 〇 FIG. 12 is a cross-sectional view taken along line AA of FIG. 11. FIG. 13 is a BB line cross-sectional view shown in FIG. China National Standard (CNS) A4 (210 x 297 mm) ^ --I .---'----------------------- ^ (please first Read the notes on the back and fill in this page) 503136 A7 B7 V. Description of the invention (7 Figure 14 is a sectional view taken along line CC in Figure 11 15, a flowchart of a position-based aspect of the method of the fifth embodiment of the display setting < Please read the notes on the back before filling this page). Fig. 16 is a perspective view of a punching machine equipped with a light safety device related to the conventional technology. FIG. 17 is an explanatory diagram of a safety distance of a conventional punching machine. [Symbols] 1 stamping machine 2 die pillow 3 lower die 4 slider, 5 upper die: 6 working area 7, 45 light safety device 7a, 41c light projector 7b, 41d light receiver 8 'twist point 10 openings 11, 16 , 21, 33, 34, 42 Clamping tool 14 Ball screw 15 Guide rod 17 Drive motor 18 Safety device position detector This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 503136 A7 B7 5 Description of the invention (f) 22 23 24, 27, 44 25 26 28 30 31 32, 37 35 38 39 40 41, 46 51 52 53 54 58 support rack pinion clamp positioning device electromagnetic brake distance spacer rod Roller pin level sensor light, controller i, twist point detector ID number input section, twist point position calculation section, module data storage section, movement control section, display connection member 61, 62 [Embodiment of the invention] hereinafter, referring to the drawings The embodiment will be described in detail. First, referring to Fig. 1, explain the twist point and safety distance of the present invention. 10 paper sizes are applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling in this page) 503136 A7 _____B7 __ 5. Description of the invention (1) Method. In actual operation, the space sandwiched by the upper mold 5 and the upper mold 3 is the work area. As shown in FIG. 1, the upper mold 5 and the lower mold 3 are used as the boundary of the foregoing work area in a state where the upper mold 5 and the upper mold 3 are in close contact. The position of the front end face of 5 is called the so-called pinch point 8. The invention is the distance between the twist point 8 and the light curtain (formed by the light projector 7a and the light receiver 7b that can move freely in the front and back directions), corresponding to the position where the mold and stamping machine can ensure a safe distance Dp, and the light type safety is set.装置 7。 Device 7. First, the position setting device of the light-type safety device according to the first embodiment will be described with reference to Figs. 2 to 5. Fig. 2 is a front view of a press equipped with a position setting device according to this embodiment, and Fig. 3 is a side view thereof. Hereinafter, the same components as those in FIG. 16 are designated by the same reference numerals, and descriptions thereof will be omitted. The light projector 7a and the light receiver 7b of the light-type safety device 7 are installed on the front and left sides of the press 1 so as to face each other, and are installed to move freely in the front and rear directions of the press 1. That is, under the openings 10 provided on the left and right side frames la, la of the punching machine 1, the frame 16 is installed by the frame installation portion 16a, and the ball screw 14 and Guide rod 15. On each of the ball screws 14 and the guide rods 15, the holders 11 are mounted so as to be freely movable in the front-rear direction. On the left; fe-to its holders 11, 11, a light projector 7a and a light receiver 7b are respectively installed. The output shaft of the drive motor 17 is connected to one end side of each ball screw 14, and the other end side is provided with a safety device position detector 18 that detects the position of the optical safety device 7 (e.g., constituted by an encoder). The light projector 7a and the light receiver 7b may be mounted so as to be opposite to each other. Next, the installation structure of the light-type safety device 7 in 11 t-square scale is applicable to the national standard (CNS) A4 specification (210 X 297 mm) in detail with reference to FIG. 4 " " " " " "; ~ ~ ΙΙΙΓΙΚ ----------! —— Order --------- Line · (Please read the precautions on the back before filling out this page) 503136 A7 ____B7____ 5. Description of the invention (丨 〇). This figure is a mounting side view of the projector 7a mounted on the left side of the punch 1. A fixture U is mounted on the light projector 7a (the same as the light receiver 7b), and a hole 14a and a hole 15a are formed in the front-rear direction. A nut 12 engaged with the ball screw 14 is inserted into the hole 14a. A guide 13 is formed in the hole 15 a to insert the guide rod 15. The ball screw 14 is rotatably mounted on the frame 16, and the guide rod 15 is mounted on the frame 16 in parallel with the ball screw 14. The frame 16 is mounted on the side frame 1a by the frame mounting portion 16a. The output shaft of the drive motor 17 mounted on the frame 16 is connected to one end of the ball screw 14, and the ball screw I4 is rotated by the normal rotation and reverse rotation of the drive motor 17, and the light emitter 7 a is passed through the holder 11. (Similarly to the light receiver 7b). The holder 11 slides along the guide rod 15 with the inner peripheral surface of the guide 13 as a guide. The control signal of the drive motor 17 is output from the controller 40. In addition, as a mechanism for moving the clamper 11 in the front-rear direction, although a ball screw and a drive motor are used, a mechanism such as an air pressure or an oil pressure cylinder may be used. It is also possible to connect drive units with different left and right sides and drive the drive units on either side. / At the other end of the ball screw 14, connect the input shaft of the position detector 18 of the safety device that detects the movement of the light projector 7a and the receiver 7b (for example, by an encoder) with the rotation of the ball screw 14. The position detector 18 is mounted on the frame 16. The safety device position detector 18 outputs the detected position signal to the controller 40. In addition, the controller 40 has a display 58 for monitoring and displaying each of the 12 paper molds. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 x 297 mm). ----- Order -------- Thread (please read the precautions on the back before filling this page) 503136 A7 _____B7 _ V. The dimension data of the description of the invention (〖丨), obtained for each mold The position setting of the light-type safety device 7 or the distance from the twist point of the light-type safety device 7 and the actual movement position pgq. Asfr Set temple. Also, on the side frame la of the press 1 (in FIG. 3, from the The rear portion (left side facing forward) is provided with a light receiver 41d (the optical axis is horizontal) of the twist point detector 41, and the light receiver 41d is mounted on the opening portion 10 of the side frame 1a with a clamp 42 Up. The light projector 41c of the twist point detector 41 is mounted on a side frame (here, on the right side) facing the light receiver 41d on the opposite side. The light projectors 41c and 41d have a plurality of optical axes arranged at predetermined intervals in a horizontal direction, and the light-shielding signals of the optical axes are input to a controller 40 (not shown). Next, the effect of the above-mentioned configuration will be described. FIG. 5 shows a state in which the slider 4 is lowered, and a part of the plurality of optical axes of the twist point detector 41 is shielded by the mold 5. By using the light projector 41c and the light receiver 41d, a plurality of optical axes are formed at predetermined intervals in the front-rear direction from the center M in the front-back direction of the mold pillow 2 to the position over the front surface 2a of the mold pillow 2 in a side view. The positions of the plurality of optical axes in the vertical direction are set approximately at the center of the mounting height. The position setting steps of the light-type safety device configured as described above are as follows: First, after the mold is exchanged, the slider 4 is raised to the top dead center position. After the twist point detector 41 is operated to form a plurality of optical axes of the light emitter 41c and the light receiver 41d, the slider 4 with the upper mold 5 mounted thereon is lowered. As shown in FIG. 5, a plurality of optical axes of the twist point detector 41 are set from the slider 13. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ----- 丨- ----- install -------- order --------- line (please read the precautions on the back before filling this page) 503136 A7 ___B7_ V. Description of the invention () 4 Front The numbers ①, ②, ③, ④, ⑤, ⑥ are sequentially ordered on the side, and the optical axis above the number ⑤ in the figure is blocked. The controller 40 detects that the unshaded optical axis is ① to ④ according to the input shading signal, and judges that the twist point of the mold after the exchange is in the ④ position. Based on the obtained twist point, the controller 40 moves the light projector 7a and the light receiver 7b of the light-type safety device 7 to the same position to ensure a safe distance Dp, and then operates the light-type safety device 7. At this time, the distance of the light-type safety device from the twist point 7 and the actual moving position are displayed on the display 58 and confirmed by the operator. Therefore, the distance between the light curtain and the twist point of the light-type safety device 7 is indeed set at the safety distance Dp. According to this, the distance between the light curtain of the light safety device 7 and the front of the mold, regardless of the size of the mold, can be determined by the size of the mold to ensure the safety distance Dp. As a result, in the same press, even a small mold has better proximity operation, improving workability and safety, reducing operator fatigue, and ensuring a safe distance even in a large mold. Carry out safe work. In addition, the current light-type safety device 7 shows the distance from the mold to the twist point and the actual movement position to ensure the safe distance status. Therefore, the operator can easily confirm that the safe distance is ensured and proceed with peace of mind. Work 0 Next, a second embodiment will be described with reference to FIGS. 6 and 7. The hardware configuration of this embodiment is not provided with the twist point detector 41 of the first embodiment. That is, as shown in FIG. 6, the light-type safety device 45 has a pair of light projectors 7 a and light receivers 7 b having a plurality of optical axes provided on the left and right sides of the slider 4. The light projectors 7 a and the light receivers 7 b are driven by the drive motor 14. This paper size applies to China National Standard (CNS) A4 (21〇X 297 mm) (Please read the notes on the back before filling this page). Binding --------- Line 503136 A7 _ B7_ 5 Explanation of the invention (θ) 17 can move freely in the front-back direction through the ball screw 14. The light-type safety device 45 of this embodiment has the function of a twist point detector in addition to the function of a normal safety device. That is, the light-shielding signals of the optical axes of the light-type safety device 45 are respectively input to the controller 40, and the controller 40 judges the twist point based on the light-shielding signals of the optical axes of the input. Next, a position setting method of the light type safety device according to this embodiment will be described with reference to FIG. 7. After removing the mold in step S1, in order to set the light safety device 45 at a position corresponding to the safety distance Dp of the mold, first move the light safety device 45 to the origin position. In addition, the operator confirms that the origin position restoration operation is completed by using a lamp display or the like provided on an operation panel (not shown). Next, the molds are exchanged in step S2. After that, in step S3, when the controller 40 inputs the predetermined mold exchange completion signal, it detects the shading of the plurality of optical axes formed by the light projector 7a and the light receiver 7b, and makes the light-type safety device 45 from the original The point position moves in the mold direction (backward). In addition, this movement may be performed by the automatic control of the controller 40, or it may be manually operated by using a push-button switch or the like provided before or after the manual operation panel. Then, in step S4, the position 45a of the light-type safety device 45 (that is, the front end position of the full-light-axis light-shielding range) is detected by the safety device position detector 18 at the position where all the optical axes are initially blocked. The position is the twist point. In step S5, the controller 40 calculates the position of the ensured safety distance Dp corresponding to the torsion point position based on the preset safety distance Dp data set in advance and the aforementioned torsion point position, and outputs a driving instruction of the drive motor Π so that The light type safety device 45 moves to the obtained position. Therefore, in step 15, the paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) ---------------------- Order ---- ----- Line (please read the precautions on the back before filling this page) 刈 3136 A7 1 ~ __B7 _____ i. Description of the invention (4) S6, make the light safety device 45 move forward, and make sure that it is away from the twist point Stop at the safety distance Dp to locate here. After that, in step S7 ', the light-type safety device 45 is operated to form a light curtain, and in step S8, preparation processing for the operation of the press and subsequent actual operations are performed. Therefore, the distance between the light curtain of the light type safety device 45 and the front of the mold ′ can ensure the safety distance Dp depending on the size of the mold regardless of the size of the mold. As a result, in the same punching machine, even a small mold has an improved proximity operation, improving workability and safety, reducing operator fatigue, and ensuring a safe distance Dp in a large mold, thereby improving safety. Sex. Next, a third embodiment will be described with reference to Figs. 8 and 9. Fig. 8 is a front view of a press equipped with a position setting device according to this embodiment, and Fig. 9 is a side view thereof. Here, the same constituent elements as those in Fig. 2 are assigned the same reference numerals, and descriptions thereof are omitted. '' A torsion point detector 46 that can move up and down is supported at the substantially central part of the front of the press 1 and is mounted on the lower part of the rod 47. The rod 47 is guided by a clamp 48 provided on the upper part of the front surface of the press 1. lead. A rack 47r is provided on the outer surface of the lever 47, and a pinion 49 that meshes with the rack 471: is provided on the upper portion of the holder 48 to be rotatable. The shaft portion of the pinion 49 is connected to the output shaft of the motor 59. The rotation of the motor 59 passes through the pinion 49 and the rack 47m to move the twist point detector 46 up and down. The twist point detector 46 is constituted by, for example, a non-contact distance sensor using laser light, and the range from the position below the slider 4 at the top dead point to the position above the die pillow 2 is set to a scanning range capable of moving up and down. The distance data detected by the twist point detector 46 is input to the controller 40. In addition, the output shaft of the motor 59 is installed with, for example, a scanning position sensor configured by an encoder. 16 The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling in this Page) '------ 丨 --Order * ------ 丨 · 503136 A7 A ^ ---- ^-V. Description of the invention (, <) 59a, the position signal of the scanning position sensor 59a is input to the controller 40. Next, the effect of this embodiment will be described. The controller 40 is a drive motor 59 that causes the twist point detector 46 to move from one end side (for example, the position below the slider) to the other end side of the scanning range described above, while scanning the front surface of the upper and lower molds to detect the upper mold. The distance to the front of the mold and the scanning position (height data) corresponding to its data in the combined state of 5 and the lower mold 3, and based on the detection data, the shape of the front of the mold and the distance from the predetermined reference position are obtained. The data is shown on the display 58. Based on these data, the position in front of the mold is detected as the twist point. Secondly, the controller 40 moves the light-type safety device 7 'so that the distance from the aforementioned detected twist point to the light curtain of the light-type safety device 7 is equal to the safety distance Dp. In this way, the detection of the twist point corresponding to the size of the mold can be performed. Since the light type safety device 7 can be set from the detected twist point to a position to ensure a safe distance Dp, the light type can be changed regardless of the size of the mold. The safety device 7 is set at an appropriate position to further improve workability and safety. In addition, since the twist point corresponding to the shape of the mold can be detected by the twist point detector 46, a safe distance with good accuracy can be ensured without being affected by the shape of the mold. Next, an embodiment of the table 4 will be described with reference to FIG. 10. The hardware configuration of this embodiment is the same as that shown in Fig. 6 of the second embodiment, and its description is omitted here. The lower mold 3 and the upper mold 5 are managed and stored as a pair of modules, and an ID number is added to each module to identify the module data such as the size data of the upper and lower molds, the name of the molded product, and the stamping processing conditions. . The controller 40 is provided with a memory that stores the data of each module corresponding to each ID number, and is used to input 17 -------------------- Order-I ---- --Line (please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 503136 A7 ^ ____ B7___ V. Description of the invention (J) ID number input part used for ID number. Fig. 10 is a functional block diagram of the position setting device of the light-type safety device according to this embodiment, and each function will be described using this figure. The ID number input section 51 is used to input the ID number of the next module to be installed when the mold is replaced. The ID number input unit 51 may be, for example, an operation input mechanism such as an ID number setting switch, a registration switch, and a confirmation display, or may be a mechanism for inputting data from other external control devices through communication or the like. The module data storage section 53 stores each module data corresponding ID number of all the used modules. In addition, the size of the lower mold and the upper mold corresponding to the ID number has been set in advance for each module data. The twist point position calculation unit 52 reads the mold size data from the module data corresponding to the ID number input from the ID number input unit 51 from the module data storage unit 53 and calculates the mold based on the mold size data. The size of the front and the position from the reference position to the front, the position of the twist point is calculated from the calculated shape data. Then, the position of the light beam type safety device 7 for securing the safety distance Dp is calculated from the obtained twist point position, and a command to move to the position is output to the movement control unit 54. The movement control unit 54 controls the drive motors 17 and 17 while monitoring the positions of the light projector 7a and the light receiver 7b with the full-position device position detectors 18 and 18, so that the light projector 7a and the light receiver 7b are moved to the positions of the movement instructions described above. Next, the effect of this embodiment will be described. Use the ID number input section 51 to input the ID number of the next upper and lower mold to be installed. The mold size data corresponding to the entered ID number is read from the module data storage section 53. According to the mold size data, the twist point position of the mold is determined by the twist point position calculation section 52. The paper size is applicable to Chinese national standards ( CNS) A4 specification (21〇X 297 mm) (Please read the notes on the back before filling this page) -n mm§ SI an nn ^ -OJ · nn I nn Is Kn I, 503136 A7 ___B7 _ V. Invention Explanation ((Ί)) The position and position of the light-type safety device 7 to ensure the safety distance dp are controlled by the movement control unit 54 to position the light-type safety device 7 at the previously requested position. It is also cited as module data. An example of storing the mold size in advance, and calculating the position of the light safety device 7 from the twist point position to the safety distance Dp according to the mold size, but is not limited to this, and it can also be obtained in advance to ensure the predetermined safety corresponding to each mold size. The position data of the light safety device 7 necessary for the distance Dp is stored in advance, and the position of the light safety device 7 is controlled based on the stored position data. According to the above-mentioned embodiment, the light The distance between the safety device 7 and the twist point, regardless of the size of the mold, can ensure the safe distance Dp depending on the size of the mold. Therefore, as for the same stamping machine, even the small mold has close operation, which improves the workability and Safety can also reduce operator fatigue. In addition, even in the case of large molds, the safety distance Dp can be reliably ensured. Next, the fifth embodiment will be described. Fig. 11 shows the main position setting device of the fifth embodiment. Partial plan view, FIG. 12 is a cross-sectional view taken along the line AA in FIG. 11, FIG. 13 is a cross-sectional view taken along the line BB in FIG. 12, and FIG. 14 is a cross-sectional view taken along the line CC in FIG. 11. / The light projector 7a facing the light receiver 7b is installed. On the upper part of the gripper 21 (the gripper 21 has a T-shaped protruding portion 21a at the lower end portion). Support members 22 are installed on the side frames la, la respectively below the left and right sides of the mold pillow 2. , 22, the cross-section T-shaped groove 22a is set in the front-rear direction, and the holder 21 supports the T-shaped protrusion 21a to be slidably engaged with the T-shaped groove 22a to support it. 19 Paper dimensions Applicable Chinese national standards CNS) A4 specification (210 X 297 mm) (Please read the notes on the back before filling out this page) I 1 Order · ------- I. 503136 A7 ______B7_ 5. Description of the invention (β) The pinion shaft 2 is mounted on the side surface of the holder 21, for example, and the pinion shaft 24a is rotatably mounted on the pinion shaft 24a. A rack 23 is provided on the side of the groove 22a on the support member 22 to the pinion 24 in the front-rear direction. The clamp 25 is mounted on the side of the clamp 21 on the side opposite to the pinion 24, and a handle 25a mounted on the clamp 25 is connected to a built-in lock mechanism (not shown) (for example, A mechanism that locks the support member 22 by turning and pushing it freely). The arrangement of the light projector 7a and the light receiver 7b may be reversed from the above. Between the upper and lower portions of the light projector 7a and the light receiver 7b, they are connected by a connecting member 61 and a connecting member 62, respectively, so that the light projector 7a and the light receiver 7b can move back and forth while facing each other. When the light projector 7a and the light receiver 7b are to be moved in the front-rear direction, the locking mechanism of the left and right clamps 25 is manually operated to release the locking mechanism, and the light projector 7a and the light receiver 7b are moved in the front-rear direction by manual operation. Then, at the desired position, the manual operation handle 25a is locked to move forward and backward, and the holder 21 is fixed to the support 22. The positioning device 26 is installed above the support 22. The lower part of the positioning device 26 has a T-shaped protrusion 6a. A T-shaped groove 22a is provided on the support member 22 supporting the positioning device 26 in the front-rear direction, and engages with the T-shaped protrusion 26a of the aforementioned device 26. A pinion 27 is arranged on the side of the positioning device 26, and the pinion 27 is engaged with a rack 23 provided on the support member 22. The pinion 27 is fixed to the pinion shaft 27a. The pinion shaft 27a is connected to the electromagnetic brake 28 (fixed to the hole 26b inserted into the positioning device 26, and the small 20 with the positioning device 26. This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ) ------------.— 丨 丨 —Order-— 丨 丨 — (Please read the notes on the back before filling out this page) 503136 A7 —__ B7 _____ V. Description of the invention (Gear 27 of The side opposite to the side). The pinion shaft 27a is fixed by exciting the electromagnetic brake 28, and it can be rotated by demagnetizing the pinion shaft 27a. The holder 21 is provided with a through hole 21c in the front-rear direction. The front end of the fulcrum shaft 29 passing through the through hole 21c is connected to the positioning device 26. A spring 29a is installed between the head of the fulcrum shaft 29 and the holder 21, and the locating device 26 is elastically pressed by the spring 29a. And it is pulled toward the head of the head shaft 29. Before the end of the rod 31 constituting the distance spacer 30, the roller 32 is supported as a rotatable clamp 33, which is installed to move freely in the front-rear direction. The holder 33 is urged forward by a spring 31a provided at the front end portion of the lever 31. The front end portion is before the lever 31, and In order to retract the gripper 33, an abutment sensor 31b for detecting the gripper 33 is a proximity switch at the rear end, and the abutment sensor 31b is abutted when the outer periphery of the roller 32 is in contact. An abutment signal is output at the front face of the mold (that is, a candidate point of the twist point). On the distance spacer 30, a lamp 39 which is lit according to the abutment signal of the abutment sensor 31b is installed. Also, the lamp 39, for example, can be installed on an operation panel (not shown). The other end of the lever 31 is connected with a clamp 34 and a pin 35, and the lever 31 can be pivoted freely in the vertical direction with the pin 35 as the center. The tool 34 is provided with a through hole 34a in the up-down direction, and a guide rod 36 is inserted through the through hole 34a. A roller 37 provided at the upper end of the guide rod 36 is inserted into the light projector 7a and the light receiver connected to the left and right to move freely. The T-shaped groove 61a of the connecting member 61 between the two upper portions of the device 7b. The lower end portion of the guide rod 36 is inserted into the groove 62a provided in the connecting member 62 in a freely movable manner (connecting members 62, 21). --- III 1 I 丨 II. 丨 丨 丨 丨 丨 丨 丨 ----- II (Please read the precautions on the back before filling this page) The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 503136 A7 _11-... — _ B7___ _-5. Description of the invention (/) It is used to connect the left and right projectors 7a and 7b Between the two lower portions). The lower end of the guide rod 36 has a wide portion of a predetermined length in the moving direction. When the guide rod 36 moves left and right in the groove 61a of the connecting member 61, the wide portion of the lower end abuts against the groove 62a. Inside, the rotation around the roller 37 of the guide rod 36 is suppressed, so that the posture of the guide rod 36 is kept vertical. Further, a level sensor 38 such as a limit switch is mounted on the upper part of the holder 34, and the horizontal state of the lever 31 is detected by the level sensor 38. The above detection signals of the abutting sensor 31b and the level sensor 38 are input to the controller 40, and the operation signals of the lamp 39 and the electromagnetic brake 28 are output from the controller 40. Here, as shown in FIG. 12, the length of the distance spacer 30 is set as the distance between the light curtain of the light safety device 7 and the front end portion of the roller 32 of the rod 31 in a horizontal state, which is equal to the safety distance Dp. Its length. Next, the effect of the above configuration will be described. The position setting method of the light type safety device according to the present invention will be described with reference to FIG. At step S11, after the operation is completed, the handle 25a of the clip / clamp 25 of the light projector 7a and the light receiver 7b of the light-type safety device is released. Next, in step S12, the distance spacer 30 is made horizontal, and the electromagnetic brake 28 of the positioning device 26 is released. Thereby, in step S13, the positioning device 26 is pulled to the head direction of the attached shaft 29 by the spring pressure of the spring 29a, and the light projector 7a and the light receiver 7b of the light type safety device 7 are retracted. Furthermore, in step s14, when the upper and lower molds are exchanged for the next mold to be formed, the mold exchange signal is input to judge that the molds have been exchanged, and the light-type safety device 22 is temporarily reset before the paper size is in accordance with Chinese National Standard (CNS ) A4 specification (210 X 297 mm) '" ~ ------------ * ------- ^ ------— ^ (Please read the note on the back first Please fill in this page again for details) 503136 A7 ______B7 _ 5. Description of the invention (> 1) 7 Position setting data. In addition, the aforementioned mold exchange signal can also be detected by, for example, an upper mold detection signal or a mold clamping end signal detected when the upper mold is installed. At this time, the slider stops near the bottom dead center, so that the combination of the lower mold and the upper mold is in a close state. At step S15, the distance spacer 30 is kept horizontal and kept horizontal 'so that the projector 7a and the receiver 7b of the light-type safety device 7 are advanced together. Then, in step S16, the outer surface of the roller 32 of the distance spacer 30 is brought into contact with the twist point of the mold ', and the lamp 39 is used to confirm the twist point detected by the sensor 31b. At this time, the position of the positioning device 26 is the setting position of the light-type safety device 7 which ensures a safe distance Dp. In step S17, the distance spacer 30 is inverted to a vertical state, and the controller 40 turns off according to the horizontal signal of the horizontal sensor 38, so that the electromagnetic brake 28 is activated to lock the position of the positioning device 26. The vertical distance spacer 30 is moved along the connecting members 61, 62 to the left or right end of the press 1. In this state, although the light-type safety device 7 cannot be moved closer to the press machine 1 than the previously set position, that is, the locking position of the positioning device 26, it can move to the opposite side of the press machine 1 freely, so When the light-type safety device 7 is set to be more secure than the previously set position, the light projector 7a and the light receiver 7b are further moved toward the head of the attached shaft 29. Then, in step S18, the light projector 7a and the light receiver 7b are locked by the operation of the handle 25a of the clamp 25. Then, in step S19, the light-type safety device 7 is operated to form a light curtain, and in step S20, preparation processing required for operating the press is performed. It is to be noted that step S14 of the above flowchart may be performed before any of steps 11 to 13. 23 scales are applicable to China National Standard (CNS) A4 specifications (210 X 297 mm)-"---------------- I ----------- (Please read the precautions on the back before filling in this page) 503136 A7 __B7_ V. Description of the invention (〆) As mentioned above, the distance Dp is set against the twist point of the mold to set the safety distance Dp, so the light type The distance between the light curtain of the safety device 7 and the twist point of the mold, regardless of the size of the mold, enables the mold size to ensure an appropriate safety distance Dp. As a result, the same stamping machine can improve the proximity operation even when the mold is small. Since it is easy to work, it can improve safety and reduce operator fatigue. In addition, when using a large mold, it can be reliably ensured. Safety distance to further improve safety. In this embodiment, a distance spacer (a safety distance setting jig having a predetermined length and a manual setting of the safety distance Dp can be easily performed) has been described. However, the embodiment is not limited to this, and for example The position setting of the light-type safety device 7 is performed by using a measuring jig such as a rod or a scale ruler (scale) set as the safety distance Dp to measure the distance from the position of the light curtain to the front of the mold. i In the present invention, although the light type safety device used in a press machine having a C-shaped side view on the left and right sides of the press machine has been described, it is not limited to this, and it can also be applied to, for example, the left and right sides of a press machine. On the side, the two front ends above and below the opening of the side frame in the shape of a C-shape are connected to one of the frames or other components to form a side frame of an M-shape. And stamping machines with upright door-type frames. In addition, although the structure of the light-type safety device in which the light projector and the light receiver form a light curtain has been described, it is not limited to this. Of course, it can also be applied to concentrating the light projector and the light receiver in one place and reflecting the light with a reflector A light-type safety device forming a light curtain. As explained above, according to the present invention, since each 24 -------------------- order for the setting---------- line ( Please read the precautions on the back before filling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 503136 A7 _ B7_ V. Description of the invention (4) (Please read the precautions on the back first (Fill in this page again) Find the twist point separately for the fixture. From the obtained twist point, find the setting position of the light-type safety device that can ensure the predetermined position to set the position. Therefore, regardless of the size of the mold, you can Set the light safety device in place. Therefore, workability and safety can be improved. In addition, since the position of the light-type safety device and the status of the safety distance are monitored by a monitor, it can be easily confirmed that the safety distance has been set, and the operator can work with peace of mind. 25 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)