JP4696393B2

JP4696393B2 - Discharge detection method and apparatus

Info

Publication number: JP4696393B2
Application number: JP2001147940A
Authority: JP
Inventors: 裕一小菅; 文夫後藤; 芳正伊地知
Original assignee: IHI Corp
Current assignee: IHI Corp
Priority date: 2001-05-17
Filing date: 2001-05-17
Publication date: 2011-06-08
Anticipated expiration: 2021-05-17
Also published as: JP2002338031A

Description

【０００１】
【発明の属する技術分野】
本発明は、搬送物の荷くずれの有無を判別する荷くずれ検出方法及び装置に関するものである。
【０００２】
【従来の技術】
一般に、段積の搬送物をコンベヤにより搬送する際には、コンベヤへの載置時もしくはコンベヤによる移送中において荷くずれを起す虞れがあるため、図１３に示す如く、コンベヤａに監視ゲートｂを立設している。
【０００３】
監視ゲートｂは、両側の柱部ｃに構成される第一検出手段ｄと、上部ｅに形成される第二検出手段ｆとを備え、第一検出手段ｄは移送方向の垂直線上で測定し、第二検出手段ｆは移送方向に沿う両側の検出ラインｇで測定し得るように構成されており、搬送物ｈの荷くずれが許容範囲を超えて起った場合には、搬送物ｈの前面及び後面の荷くずれを第一検出手段ｄにより検出すると共に、搬送物ｈの両側面の荷くずれを第二検出手段ｆにより検出し、人手等により荷くずれを直すようにしている。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記の如き、監視ゲートｂの第二検出手段ｆにより搬送物ｈの両側面の荷くずれを検出する際には、搬送物ｈが所定の大きさであると共に許容範囲以上の荷くずれを起す必要があるため、搬送物ｈが所定の大きさより小さい場合には、図１４に示すごとく、許容範囲以上の荷くずれを起している場合であっても（図１４は搬送物ｈの側方への荷くずれを示す）、搬送物ｈの荷くずれが第二検出手段ｆの検出ラインｇに達することなく、搬送物ｈの両側面の荷くずれを検出することができないという問題があった。
【０００５】
本発明は上述の実情に鑑みてなしたもので、搬送物の大きさに影響されることなく、搬送物の前後面及び両側面の荷くずれを検出する荷くずれ検出方法及び装置を提供することを目的としている。
【０００７】
【課題を解決するための手段】
本発明の荷くずれ検出方法は、移送手段による搬送物の移送に伴い、搬送物の前面が第一位置検出手段の第一感知線に進入すると、第一位置検知手段は搬送物の進入を感知して第一エリア検出手段を作動させ、第一エリア検出手段により搬送物の移送方向前方を測定して、搬送物の前面の荷くずれが許容荷くずれ量以上の場合に荷くずれと判断し、
且つ更なる搬送物の移送に伴い、搬送物の後面が第二位置検出手段の第二感知線から退出すると、第二位置検出手段は搬送物の退出を感知して第一エリア検出手段を作動させ、第一エリア検出手段により搬送物の移送方向後方を測定して、搬送物の後面の荷くずれが許容荷くずれ量以上の場合に荷くずれと判断し、
前記搬送物を回転させることにより搬送物の側面を移送方向の前後に向け、
前記搬送物の移送に伴い、搬送物の前面が第三位置検出手段の第三感知線に進入すると、第三位置検知手段は搬送物の進入を感知して第二エリア検出手段を作動させ、第二エリア検出手段により搬送物の移送方向前方を測定して、搬送物の一側面の荷くずれが許容荷くずれ量以上の場合に荷くずれと判断し、
且つ更なる搬送物の移送に伴い、搬送物の後面が第四位置検出手段の第四感知線から退出すると、第四位置検出手段は搬送物の退出を感知して第二エリア検出手段を作動させ、第二エリア検出手段により搬送物の移送方向後方を測定して、搬送物の他側面の荷くずれが許容荷くずれ量以上の場合に荷くずれと判断するものである。
【０００８】
本発明の荷くずれ検出方法について、搬送物を回転させる際に搬送物を移送手段から離間させてもよい。
【００１０】
本発明の荷くずれ検出装置は、搬送物を搬送する移送手段と、
鉛直線上に対する搬送物の荷くずれを移送方向の垂直線上で測定する第一エリア検出手段と、
該第一エリア検出手段により搬送物の移送方向前方を測定して搬送物の前面の荷くずれを検出するよう、搬送物の移送に伴い、搬送物の前面が第一感知線に進入した時に搬送物の進入を感知して第一エリア検出手段を作動させる第一位置検出手段と、
前記第一エリア検出手段により搬送物の移送方向後方を測定して搬送物の後面の荷くずれを検出するよう、更なる搬送物の移送に伴い、搬送物の後面が第二感知線から退出した時に搬送物の退出を感知して第一エリア検出手段を作動させる第二位置検出手段と、
前記搬送物を回転させることにより搬送物の側面を移送方向の前後に向ける回転手段と、
該回転手段の下流に位置し且つ鉛直線上に対する搬送物の荷くずれを移送方向の垂直線上で測定する第二エリア検出手段と、
該第二エリア検出手段により搬送物の移送方向前方を測定して搬送物の一側面の荷くずれを検出するよう、搬送物の移送に伴い、搬送物の前面が第三感知線に進入した時に搬送物の進入を感知して第二エリア検出手段を作動させる第三位置検出手段と、
前記第二エリア検出手段により搬送物の移送方向後方を測定して搬送物の他側面の荷くずれを検出するよう、更なる搬送物の移送に伴い、搬送物の後面が第四感知線から退出した時に搬送物の退出を感知して第二エリア検出手段を作動させる第四位置検出手段とを備えたものである。
【００１１】
本発明の荷くずれ検出装置について、搬送物を回転させる際に搬送物を移送手段から離間させる昇降手段を備えてもよい。
【００１２】
このように、搬送物の前後面の荷くずれを第一エリア検出手段により測定して検出すると共に、搬送物の両側面の荷くずれを、搬送物の回転を介して第二エリア検出手段により搬送物の移送方向前方及び移送方向後方を測定して検出するので、移送方向に沿う両側の検出ラインで測定する場合の如く搬送物の大きさ及び荷くずれ量に影響されることがなく、搬送物の前後面及び両側面の荷くずれを確実に検出することができる。
【００１３】
又、搬送物を回転させる際に搬送物を移送手段から離間させると、回転時に搬送物の底面にキズが付くことがなく、キズが付きやすい搬送物の材質等に対して容易に対応することができる。
【００１４】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照しつつ説明する。
【００１５】
図１〜図１２は本発明の荷くずれ検出方法及び装置を実施する形態例を示すものである。
【００１６】
搬送物１の荷くずれ検出装置２は、脚部３と側部フレーム４により構成される台部５に複数のローラ６を配置した移送手段のローラコンベヤ７を備え、ローラコンベヤ７のローラ６にはスプロケット８が捲き掛けられると共に、スプロケット８にはチェーン９を介して移送用モータ１０が接続されている。
【００１７】
又、ローラコンベヤ７は、所定位置のローラ６を除き且つ移送方向の所定範囲において中央フレーム１１を介してローラ６を二分割することにより、中途位置に水平面から見て略十字形の空間１２を形成し、略十字形の空間１２の下方には、脚部３の底部フレーム１３に設置される昇降手段の昇降部１４を備えている。
【００１８】
昇降手段の昇降部１４は、図４に示す如く、底部フレーム１３の上面に下部台座１５を取付け、下部台座１５には、昇降用モータ１６を設けると共に、チェーン、ギア等の連結手段１７を介して昇降用モータ１６と接続される複数のカム１８を備え（図４では二個）、複数のカム１８には、接触プレート１９を介して上部台座２０を搭載し、昇降部１４の上部台座２０の上面には回転手段の回転部２１を備えている。
【００１９】
回転手段の回転部２１は、図２に示す如く、昇降部１４の上部台座２０の上面より立設する脚部２２と側部フレーム２３により台部２４を構成し、台部２４の中央には、図５に示す如く、中央フレーム２５を介して回転軸２６を軸支すると共に、台部２４の側部には、チェーン、ギア等の連結手段２７を介して回転軸２６と接続される回転用モータ２８を設置している。又、回転軸２６には側部フレーム２３の方向へ突出するブラケット２９を備えると共に、回転軸２６を取り囲む側部フレーム２３には、ブラケット２９と係止する二つのストッパ３０を備え、回転軸２６の回転を９０゜に制限している。
【００２０】
又、回転軸２６の頂部には、略十字形の空間１２に配置される十字形の支持台３１を配置している。
【００２１】
一方、支持台３１の上流側には、ローラコンベヤ７を跨ぐ第一監視ゲート３２を配置し、第一監視ゲート３２の両側の柱部３３には、上下方向に集合した第一エリア検出手段の光電センサ群３４を備え、鉛直線上で且つ移送方向の垂直線上の範囲を測定し得るように構成されている。又、両側の柱部３３におけるローラ６より上方の所定高さ部分には、光電センサ群３４から許容荷くずれ量αの所定幅を有するよう光電センサ群３４の上流側に配置される第一位置検出手段３５と、光電センサ群３４から許容荷くずれ量αの所定幅を有するよう光電センサ群３４の下流側に配置される第二位置検出手段３６とを備えている。
【００２２】
支持台３１の下流側には、第一監視ゲート３２と略同様なローラコンベヤ７を跨ぐ第二監視ゲート３７を配置し、第二監視ゲート３７の両側の柱部３８には、上下方向に集合した第二エリア検出手段の光電センサ群３９を備え、鉛直線上で且つ移送方向の垂直線上の範囲を測定し得るように構成されている。又、両側の柱部３８におけるローラ６より上方の所定高さ部分には、第一位置検出手段３５と第二位置検出手段３６と同様に、光電センサ群３９から許容荷くずれ量αの所定幅を有する光電センサ群３９の上流側に配置される第三位置検出手段４０と、光電センサ群３９から許容荷くずれ量αの所定幅を有するよう光電センサ群３９の下流側に配置される第四位置検出手段４１とを備えている。
【００２３】
以下、本発明の荷くずれ検出方法及び装置を実施する形態例の作用を説明する。
【００２４】
搬送物１を所定位置に搬送する際には、初めにリフト等によりローラコンベヤ７の端側に載置し、図６（Ａ）に示す如く、移送用モータ１０によって回転するローラ６により搬送物１を移送する。ここで、移送される搬送物１は、水平面より見て四角形の物を段積し、搬送物の前面を１ａ、後面を１ｂ、一側面を１ｃ、他側面を１ｄとしたものであり、図６、図７中、４２は第一監視ゲート３２の光電センサ群３４の検出線、４３は第一位置検出手段３５の第一感知線、４４は第二位置検出手段３６の第二感知線、４５は第二監視ゲート３７の光電センサ群３９の検出線、４６は第三位置検出手段４０の第三感知線、４７は第四位置検出手段４１の第四感知線を示し、図１０、図１１、図１２に示すフロー図は、Ａ、Ｂで夫々通じている。
【００２５】
続いて、図６（Ｂ）、（Ｃ）に示す如く、搬送物１を移送して第一位置検出手段３５の第一感知線４３に進入させると、第一位置検出手段３５は搬送物１の進入を感知して第一監視ゲート３２の光電センサ群３４を作動させ、光電センサ群３４の検出線４２により鉛直線上で且つ移送方向の略垂直線上の範囲で搬送物１の移送方向前方を測定する。この時、図８に示す如く、搬送物１の前面１ａの荷くずれが許容荷くずれ量αの範囲内の場合には、光電センサ群３４の検出線４２により搬送物１の前面１ａの荷くずれを検出することなく、搬送物１をそのままの状態で下流へ移送し、搬送物１の前面１ａの荷くずれが許容荷くずれ量αの範囲以上の場合には、光電センサ群３４の検出線４２により搬送物１の前面１ａの荷くずれを検出し、搬送物１をリジェクトライン（図示せず）に移送することより搬送物１の前面１ａの荷くずれを修正してローラコンベヤ７に戻す。
【００２６】
次に、図６（Ｄ）、（Ｅ）に示す如く、搬送物１を更に移送して第二位置検出手段３６の第二感知線４４より退出させると、第二位置検出手段３６は搬送物１の退出を感知して光電センサ群３４を再度作動させ、光電センサ群３４の検出線４２により鉛直線上で且つ移送方向の略垂直線上の範囲で搬送物１の移送方向後方を測定する。この時、図９に示す如く、搬送物１の後面１ｂの荷くずれが許容荷くずれ量αの範囲内の場合には、光電センサ群３４の検出線４２により搬送物１の後面１ｂの荷くずれを検出することなく、搬送物１をそのままの状態で下流へ移送し、搬送物１の後面１ｂの荷くずれが許容荷くずれ量αの範囲以上の場合には、光電センサ群３４の検出線４２により搬送物１の後面１ｂの荷くずれを検出し、搬送物１をリジェクトライン（図示せず）に移送することより搬送物１の後面１ｂの荷くずれを修正してローラコンベヤ７に戻す。
【００２７】
搬送物１の前後面１ａ，１ｂの荷くずれを測定した後には、搬送物１を更に移送して、図６（Ｆ）に示す如く、センサ（図示せず）により支持台３１上で停止させ、昇降部１４のカム１８を回転して上部台座２０を昇降させることにより、図７（Ｇ）に示す如く、回転部２１及び支持台３１を昇降して搬送物１をローラコンベヤ７から離間させ、更に、回転用モータ２８を介して回転部２１の回転軸２６を９０゜回転させることにより、図７（Ｈ）に示す如く、搬送物１の一側面１ｃを移送方向前方へ向けると共に他側面１ｄを移送方向後方へ向け、更に又、昇降部１４のカム１８を回転して上部台座２０を降下させることにより、図７（Ｉ）に示す如く、回転部２１及び支持台３１を降下して搬送物１をローラコンベヤ７に戻す。なお、回転軸２６は、搬送物１を搬送した後は、その位置で待機し、次の搬送物１に逆方向に９０゜回転するように動作する。
【００２８】
続いて、図７（Ｊ）に示す如く、搬送物１を移送して第三位置検出手段４０の第三感知線４６に進入させると、第三位置検出手段４０は搬送物１の進入を感知して第二監視ゲート３７の光電センサ群３９を作動させ、光電センサ群３９の検出線４５により鉛直線上で且つ移送方向の略垂直線上の範囲で搬送物１の移送方向前方を測定する。この時、搬送物１の移送方向前方となった一側面１ｃの荷くずれが許容荷くずれ量αの範囲内の場合には、第一監視ゲート３２の光電センサ群３４と同様に、光電センサ群３９の検出線４５により搬送物１の一側面１ｃの荷くずれを検出することなく、搬送物１をそのままの状態で下流へ移送し、搬送物１の移送方向前方となった一側面１ｃの荷くずれが許容荷くずれ量αの範囲以上の場合には、更に第一監視ゲート３２の光電センサ群３４と同様に、光電センサ群３９の検出線４５により搬送物１の一側面１ｃの荷くずれを検出し、搬送物１をリジェクトライン（図示せず）に移送することより搬送物１の一側面１ｃの荷くずれを修正してローラコンベヤ７に戻す。
【００２９】
次に、図７（Ｋ）に示す如く、搬送物１を更に移送して第四位置検出手段４１の第四感知線４７より退出させると、第四位置検出手段４１は搬送物１の退出を感知して第二監視ゲート３７の光電センサ群３９を再度作動させ、光電センサ群３９の検出線４５により鉛直線上で且つ移送方向の略垂直線上の範囲で搬送物１の移送方向後方を測定する。この時、搬送物１の移送方向後方となった他側面１ｄの荷くずれが許容荷くずれ量αの範囲内の場合には、第一監視ゲート３２の光電センサ群３４と同様に、光電センサ群３９の検出線４５により搬送物１の他側面１ｄの荷くずれを検出することなく、搬送物１をそのままの状態で下流へ移送し、搬送物１の移送方向後方となった他側面１ｄの荷くずれが許容荷くずれ量αの範囲以上の場合には、更に第一監視ゲート３２の光電センサ群３４と同様に、光電センサ群３９の検出線４５により搬送物１の他側面１ｄの荷くずれを検出し、搬送物１をリジェクトライン（図示せず）に移送することより搬送物１の他側面１ｄの荷くずれを修正してローラコンベヤ７に戻す。
【００３０】
更に、搬送物１の前後面１ａ，１ｂ及び両側面１ｃ，１ｄの荷くずれを測定した後には、図７（Ｌ）に示す如く、搬送物１を所定位置に到達させる。
【００３１】
このように、搬送物１の前後面１ａ，１ｂの荷くずれを第一監視ゲート３２の光電センサ群３４により測定して検出すると共に、搬送物１の両側面１ｃ，１ｄの荷くずれを、搬送物１の回転を介して第二監視ゲート３７の光電センサ群３９により搬送物１の移送方向前方及び移送方向後方を測定して検出するので、移送方向に沿う両側の検出ラインで測定する場合の如く搬送物１の大きさ及び荷くずれ量に影響されることなく、搬送物１の前後面１ａ，１ｂ及び両側面１ｃ，１ｄの荷くずれを確実に検出することができる。
【００３２】
又、搬送物１を回転させる際に昇降部１４を介して搬送物１をローラコンベヤ７から離間させると、回転時に搬送物１の底面にキズが付くことがなく、キズが付きやすい搬送物１の材質等に対して容易に対応することができる。
【００３３】
なお、本発明の荷くずれ検出方法及び装置は、上述の形態例にのみ限定されるものではなく、第一エリア検出手段及び第二エリア検出手段は光電センサ群でなく他の検出手段でもよいこと、第一位置検出手段〜第四位置検出手段は搬送物の進入及び退出を感知すると共に第一エリア検出手段及び第二エリア検出手段を作動させるものならばどの様なものでもよいこと、移送手段はローラコンベヤでなくスラットコンベヤ、ベルトコンベヤ等の他のコンベヤでもよいこと、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【００３４】
【発明の効果】
以上述べたように、本発明の荷くずれ検出方法及び装置によれば、下記の如き、種々の優れた効果を奏し得る。
【００３５】
Ｉ）搬送物の前後面の荷くずれを第一エリア検出手段により測定して検出すると共に、搬送物の両側面の荷くずれを、搬送物の回転を介して第二エリア検出手段により搬送物の移送方向前方及び移送方向後方を測定して検出するので、移送方向に沿う両側の検出ラインで測定する場合の如く搬送物の大きさ及び荷くずれ量に影響されることがなく、搬送物の前後面及び両側面の荷くずれを確実に検出することができる。
【００３６】
ＩＩ）搬送物を回転させる際に搬送物を移送手段から離間させると、回転時に搬送物の底面にキズが付くことがなく、キズが付きやすい搬送物の材質等に対して容易に対応することができる。
【図面の簡単な説明】
【図１】本発明を実施する形態例を示す平面図である。
【図２】図１のＩＩ−ＩＩ方向矢視図である。
【図３】図１のＩＩＩ−ＩＩＩ方向矢視図である。
【図４】昇降手段の昇降部を示す概略図である。
【図５】回転手段の回転部を示す概略図である。
【図６】本発明を実施する形態例において（Ａ）は搬送物が第一監視ゲートへ進入する前の状態を示す概略図であり、（Ｂ）は搬送物が第一監視ゲートへ進入することによって光電センサ群により搬送物の前面を測定する状態を示す概略図であり、（Ｃ）は（Ｂ）の側面図であり、（Ｄ）は搬送物が第一監視ゲートを退出することによって光電センサ群により搬送物の後面を測定する状態を示す概略図であり、（Ｅ）は（Ｄ）の側面図であり、（Ｆ）は搬送物が支持台上で停止した状態を示す概略図である。
【図７】図６（Ａ）〜（Ｆ）に続くものであり、（Ｇ）は搬送物がローラコンベヤから離間した状態を示す概略図であり、（Ｈ）は搬送物が回転台により回転する状態を示す概略図であり、（Ｉ）は搬送物がローラコンベヤに戻った状態を示す概略図であり、（Ｊ）は搬送物が第二監視ゲートへ進入することによって光電センサ群により搬送物の前方（搬送物の一側面）を測定する状態を示す概略図であり、（Ｋ）は搬送物が第二監視ゲートへ進入することによって光電センサ群により搬送物の後方（搬送物の他側面）を測定する状態を示す概略図であり、（Ｌ）は搬送物の前後面及び両側面の荷くずれを測定した後の状態を示す概略図である。
【図８】図６（Ｃ）のＶＩＩＩ部の拡大概略図である。
【図９】図６（Ｅ）のＩＸ部の拡大概略図である。
【図１０】本発明の荷くずれ検出方法及び装置を実施する形態の手順を示すフロー図である。
【図１１】図１０より続く形態の手順を示すフロー図である。
【図１２】図１１より続く形態の手順を示すフロー図である。
【図１３】従来例の荷くずれ検出装置を示す概略側面図である。
【図１４】所定の大きさよりも小さい搬送物が荷くずれを起した状態を示す概略側面図である。
【符号の説明】
１搬送物
１ａ搬送物の前面
１ｂ搬送物の後面
１ｃ搬送物の一側面
１ｄ搬送物の他側面
７ローラコンベヤ（移送手段）
１４昇降部（昇降手段）
２１回転部（回転手段）
３４光電センサ群（第一エリア検出手段）
３５第一位置検出手段
３６第二位置検出手段
３９光電センサ群（第二エリア検出手段）
４０第三位置検出手段
４１第四位置検出手段
４３第一感知線
４４第二感知線
４６第三感知線
４７第四感知線 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load breakage detection method and apparatus for determining the presence or absence of a load breakage of a conveyed product.
[0002]
[Prior art]
In general, when transporting a stacked product by a conveyor, there is a risk of causing a load slippage when it is placed on the conveyor or being transferred by the conveyor. Therefore, as shown in FIG. Is standing.
[0003]
The monitoring gate b includes first detection means d configured on the pillars c on both sides and second detection means f formed on the upper part e. The first detection means d measures on a vertical line in the transfer direction. The second detection means f is configured so as to be able to measure with detection lines g on both sides along the transfer direction, and when the load of the transported object h exceeds the allowable range, The front and rear load deviations are detected by the first detection means d, and the load deviations on both sides of the transported object h are detected by the second detection means f so that the load deviations are corrected manually.
[0004]
[Problems to be solved by the invention]
However, when the load detection on both sides of the transported object h is detected by the second detection means f of the monitoring gate b as described above, the transported object h has a predetermined size and a load slip exceeding the allowable range. When the transported object h is smaller than a predetermined size, as shown in FIG. 14, even when the load humping exceeds the allowable range (FIG. 14 shows the side of the transported object h). There is a problem that it is impossible to detect the load displacement on both sides of the conveyed product h without the load displacement of the conveyed product h reaching the detection line g of the second detection means f. .
[0005]
The present invention has been made in view of the above circumstances, and provides a load slip detection method and apparatus for detecting load slip on the front and rear surfaces and both side surfaces of a transport object without being affected by the size of the transport object. It is an object.
[0007]
[Means for Solving the Problems]
According to the load displacement detection method of the present invention , when the front surface of the conveyed object enters the first sensing line of the first position detecting means as the conveyed object is transferred by the transferring means, the first position detecting means detects the entry of the conveyed object. Then, the first area detecting means is operated, and the first area detecting means is used to measure the front of the transported object in the transfer direction , and when the load displacement on the front surface of the conveyed object is greater than or equal to the allowable load displacement amount,
In addition , when the rear surface of the transported object leaves the second sensing line of the second position detecting means as the transported object further moves, the second position detecting means detects the retreat of the transported object and operates the first area detecting means. is allowed, by measuring the transport direction behind the conveyed by the first area detecting means, collapsing of the rear surface of the conveyed object is determined to collapsing when the above amount collapses permissible load,
By rotating the transported object, the side surface of the transported object is directed back and forth in the transfer direction ,
When the front of the transported object enters the third sensing line of the third position detecting means along with the transport of the transported object, the third position detecting means senses the entrance of the transported object and activates the second area detecting means, Measure the front in the transfer direction of the transported object by the second area detecting means, and determine that the load slippage on one side of the transported object is greater than the allowable load slippage amount,
In addition , when the rear surface of the transported object leaves the fourth sensing line of the fourth position detecting means as the transported object further moves, the fourth position detecting means detects the retreat of the transported object and operates the second area detecting means. is allowed, by measuring the transport direction behind the conveyed object by the second area detecting means is for determining the collapsing when collapsing the other side is not less than the amount broken permissible load of conveying thereof.
[0008]
In the load displacement detection method of the present invention, the conveyed product may be separated from the transfer means when the conveyed product is rotated.
[0010]
Collapsing detecting apparatus of the present invention includes a transport means for conveying the conveyed object,
A first area detecting means for measuring the load load on the vertical line on the vertical line in the transfer direction ;
Conveyed when the front of the transported object enters the first sensing line as the transported object is moved so that the first area detection means measures the front of the transported object in the transport direction and detects the load displacement on the front surface of the transported object. First position detecting means for operating the first area detecting means by sensing the entry of an object ;
The rear surface of the transported object has left the second sensing line with the further transport of the transported object so that the first area detecting means measures the rearward direction of the transported object to detect the load slippage on the rear surface of the transported object. Second position detecting means for sometimes sensing the exit of the conveyed object and activating the first area detecting means ;
Rotating means for rotating the transported object to turn the side surface of the transported object back and forth in the transfer direction ;
A second area detecting means that is located downstream of the rotating means and that measures the load load on the vertical line on the vertical line in the transfer direction ;
When the front of the transported object enters the third sensing line with the transport of the transported object so that the second area detection means measures the front in the transport direction of the transported object and detects the load displacement on one side of the transported object. A third position detecting means for operating the second area detecting means by sensing the entry of the conveyed product ;
To detect the other side of the crumbling of the conveyed object by measuring the transport direction behind the conveyed object by the second area detecting means, with the transfer of further conveyed, the rear surface of the conveyed object is withdrawn from the fourth sensing line And a fourth position detecting means for operating the second area detecting means by sensing the retreat of the conveyed product .
[0011]
The load deviation detecting device of the present invention may be provided with lifting / lowering means for separating the conveyed product from the transfer means when rotating the conveyed product.
[0012]
In this way, the load displacement on the front and rear surfaces of the conveyed product is measured and detected by the first area detecting means, and the load displacement on both side surfaces of the conveyed product is conveyed by the second area detecting means via the rotation of the conveyed product. Since the front and rear of the transport direction are measured and detected, the size of the transported object and the amount of load displacement are not affected as in the case of measuring with detection lines on both sides along the transport direction. It is possible to reliably detect the load displacement on the front and rear surfaces and both side surfaces.
[0013]
Also, if the transported object is moved away from the transfer means when rotating the transported object, the bottom surface of the transported object will not be scratched during the rotation, and it will be easy to cope with the material of the transported object that is easily scratched. Can do.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIGS. 1-12 shows the example which implements the load loss detection method and apparatus of this invention.
[0016]
The load displacement detection device 2 for the conveyed product 1 includes a roller conveyor 7 as a transfer means in which a plurality of rollers 6 are arranged on a base portion 5 constituted by a leg portion 3 and a side frame 4. The sprocket 8 is strung and a transfer motor 10 is connected to the sprocket 8 through a chain 9.
[0017]
Further, the roller conveyor 7 divides the roller 6 into two through the central frame 11 in a predetermined range in the transfer direction, excluding the roller 6 in a predetermined position, thereby forming a substantially cross-shaped space 12 in the middle position when viewed from the horizontal plane. Below the substantially cross-shaped space 12 formed, an elevating part 14 for elevating means installed on the bottom frame 13 of the leg part 3 is provided.
[0018]
As shown in FIG. 4, the elevating part 14 of the elevating means is provided with a lower pedestal 15 attached to the upper surface of the bottom frame 13, and the lower pedestal 15 is provided with an elevating motor 16 and via a connecting means 17 such as a chain and a gear. And a plurality of cams 18 connected to the lifting motor 16 (two in FIG. 4). The plurality of cams 18 are mounted with an upper pedestal 20 via a contact plate 19, and the upper pedestal 20 of the lifting unit 14 is mounted. Is provided with a rotating part 21 of rotating means.
[0019]
As shown in FIG. 2, the rotating part 21 of the rotating means comprises a base part 24 composed of a leg part 22 and a side frame 23 erected from the upper surface of the upper base 20 of the elevating part 14. As shown in FIG. 5, the rotary shaft 26 is pivotally supported via the central frame 25, and the side portion of the base 24 is connected to the rotary shaft 26 via a connecting means 27 such as a chain or a gear. Motor 28 is installed. The rotating shaft 26 includes a bracket 29 protruding in the direction of the side frame 23, and the side frame 23 surrounding the rotating shaft 26 includes two stoppers 30 that are engaged with the bracket 29. Is limited to 90 °.
[0020]
Further, a cross-shaped support base 31 disposed in the substantially cross-shaped space 12 is disposed on the top of the rotating shaft 26.
[0021]
On the other hand, a first monitoring gate 32 that straddles the roller conveyor 7 is arranged on the upstream side of the support base 31, and the pillars 33 on both sides of the first monitoring gate 32 have first area detection means that are gathered vertically. The photoelectric sensor group 34 is provided, and it is comprised so that the range on the vertical line and the vertical line of a transfer direction can be measured. Further, a first position arranged on the upstream side of the photoelectric sensor group 34 so as to have a predetermined width of an allowable load displacement amount α from the photoelectric sensor group 34 at a predetermined height portion above the roller 6 in the pillars 33 on both sides. The detection means 35 and the second position detection means 36 disposed downstream of the photoelectric sensor group 34 so as to have a predetermined width of the allowable load displacement amount α from the photoelectric sensor group 34 are provided.
[0022]
On the downstream side of the support 31, a second monitoring gate 37 straddling the roller conveyor 7, which is substantially the same as the first monitoring gate 32, is arranged, and the column portions 38 on both sides of the second monitoring gate 37 gather in the vertical direction. The photoelectric sensor group 39 of the second area detecting means is configured so as to be able to measure a range on the vertical line and on the vertical line in the transfer direction. Further, in the predetermined height portions above the rollers 6 in the column portions 38 on both sides, the predetermined width of the allowable load deviation amount α from the photoelectric sensor group 39 is provided, as in the first position detecting means 35 and the second position detecting means 36. A third position detecting means 40 disposed on the upstream side of the photoelectric sensor group 39 and a fourth position disposed on the downstream side of the photoelectric sensor group 39 so as to have a predetermined width of the allowable load displacement amount α from the photoelectric sensor group 39. Position detecting means 41 is provided.
[0023]
Hereinafter, the operation of the embodiment for carrying out the load displacement detection method and apparatus of the present invention will be described.
[0024]
When transporting the transported object 1 to a predetermined position, the transported object 1 is first placed on the end side of the roller conveyor 7 by a lift or the like, and is transported by a roller 6 rotated by a transfer motor 10 as shown in FIG. 1 is transferred. Here, the transported object 1 is a stack of rectangular objects as viewed from the horizontal plane, with the front surface of the transported object being 1a, the rear surface being 1b, one side surface being 1c, and the other side surface being 1d. 6, in FIG. 7, the 42 detection line of the photoelectric sensors 34 of the first monitoring gate 32, 43 is a first sensing line of the first position detection means 35, 44 the second sensing line of the second position detecting means 36, 45 detection line of the photoelectric sensors 39 of the second monitoring gate 37, 46 is a third sense line of the third position detection means 40, 47 show a fourth sense line of the fourth position detector 41, 10, FIG. The flowcharts shown in FIGS. 11 and 12 are respectively shown as A and B.
[0025]
Subsequently, as shown in FIGS. 6B and 6C, when the conveyed product 1 is transferred and enters the first sensing line 43 of the first position detecting means 35, the first position detecting means 35 is moved to the conveyed object 1. , The photoelectric sensor group 34 of the first monitoring gate 32 is activated, and the detection line 42 of the photoelectric sensor group 34 moves the forward direction of the transported object 1 in the range of the vertical line and the substantially vertical line of the transfer direction. taking measurement. At this time, as shown in FIG. 8, when the load displacement of the front surface 1a of the conveyed object 1 is within the allowable load displacement amount α, the load displacement of the front surface 1a of the conveyed object 1 is detected by the detection line 42 of the photoelectric sensor group 34. When the transported object 1 is transferred downstream without being detected, and the load displacement of the front surface 1a of the conveyed object 1 is equal to or larger than the allowable load displacement amount α, the detection line 42 of the photoelectric sensor group 34 is detected. Thus, the load displacement of the front surface 1a of the conveyed product 1 is detected, and the conveyed material 1 is transferred to a reject line (not shown) to correct the load displacement of the front surface 1a of the conveyed product 1 and return to the roller conveyor 7.
[0026]
Next, as shown in FIGS. 6D and 6E, when the transported object 1 is further transported and retreated from the second sensing line 44 of the second position detecting means 36, the second position detecting means 36 is moved to the transported object. 1 is detected, the photoelectric sensor group 34 is actuated again, and the back of the transported object 1 in the transport direction is measured in the range on the vertical line and in the substantially vertical line of the transport direction by the detection line 42 of the photoelectric sensor group 34. At this time, as shown in FIG. 9, when the load displacement of the rear surface 1b of the conveyed product 1 is within the allowable load displacement amount α, the load displacement of the rear surface 1b of the conveyed product 1 is detected by the detection line 42 of the photoelectric sensor group 34. When the transported object 1 is transferred downstream without being detected, and the load displacement of the rear surface 1b of the conveyed object 1 is equal to or larger than the allowable load displacement amount α, the detection line 42 of the photoelectric sensor group 34 is detected. By detecting the load displacement of the rear surface 1b of the conveyed product 1 and transferring the conveyed product 1 to a reject line (not shown), the load displacement of the rear surface 1b of the conveyed product 1 is corrected and returned to the roller conveyor 7.
[0027]
After measuring the load displacement of the front and rear surfaces 1a and 1b of the conveyed product 1, the conveyed item 1 is further transferred and stopped on the support base 31 by a sensor (not shown) as shown in FIG. 6 (F). By rotating the cam 18 of the elevating unit 14 and elevating the upper base 20, the rotating unit 21 and the support table 31 are raised and lowered to separate the conveyed product 1 from the roller conveyor 7 as shown in FIG. Further, by rotating the rotary shaft 26 of the rotating portion 21 by 90 ° via the rotation motor 28, as shown in FIG. 7H, one side 1c of the conveyed product 1 is directed forward in the transfer direction and the other side surface. By turning 1d rearward in the transfer direction and rotating the cam 18 of the elevating part 14 to lower the upper base 20, the rotating part 21 and the support base 31 are lowered as shown in FIG. The conveyed product 1 is returned to the roller conveyor 7. In addition, after the conveyed product 1 is conveyed, the rotating shaft 26 stands by at that position and operates to rotate 90 ° in the reverse direction to the next conveyed product 1.
[0028]
Subsequently, as shown in FIG. 7 (J), when the conveyed product 1 is transported and entered into the third sensing line 46 of the third position detecting means 40, the third position detecting means 40 senses the entry of the conveyed object 1. Then, the photoelectric sensor group 39 of the second monitoring gate 37 is operated, and the forward direction of the transported object 1 is measured in the range on the vertical line and on the substantially vertical line of the transfer direction by the detection line 45 of the photoelectric sensor group 39. At this time, when the load displacement of the one side surface 1c that is in front of the transported object 1 is within the allowable load displacement amount α, the photoelectric sensor group is the same as the photoelectric sensor group 34 of the first monitoring gate 32. 39, without detecting the load displacement of the one side surface 1c of the conveyed object 1, the conveyed object 1 is transported downstream as it is, and the load on the one side surface 1c that is in front of the conveying direction of the conveyed object 1 is detected. If the breakage is greater than or equal to the allowable load displacement amount α, the load displacement of the one side surface 1c of the conveyed object 1 is further detected by the detection line 45 of the photoelectric sensor group 39, similarly to the photoelectric sensor group 34 of the first monitoring gate 32. By detecting and transporting the conveyed product 1 to a reject line (not shown), the load displacement on one side 1c of the conveyed product 1 is corrected and returned to the roller conveyor 7.
[0029]
Next, as shown in FIG. 7 (K), when the transported object 1 is further transferred and retracted from the fourth sensing line 47 of the fourth position detecting means 41, the fourth position detecting means 41 causes the transported object 1 to exit. The photoelectric sensor group 39 of the second monitoring gate 37 is actuated again, and the rearward direction of the transported object 1 is measured in the range on the vertical line and in the substantially vertical line of the transfer direction by the detection line 45 of the photoelectric sensor group 39. . At this time, in the case where the load displacement of the other side surface 1d located behind the transported object 1 is within the allowable load displacement amount α, the photoelectric sensor group is similar to the photoelectric sensor group 34 of the first monitoring gate 32. 39, without detecting the load displacement of the other side surface 1d of the transported object 1, the transported object 1 is transported downstream as it is, and the load on the other side surface 1d that is behind the transport direction of the transported object 1 is detected. If the breakage is greater than or equal to the allowable load slippage amount α, the load on the other side surface 1d of the conveyed product 1 is further detected by the detection line 45 of the photoelectric sensor group 39 in the same manner as the photoelectric sensor group 34 of the first monitoring gate 32. By detecting and transferring the conveyed product 1 to a reject line (not shown), the load displacement of the other side 1d of the conveyed product 1 is corrected and returned to the roller conveyor 7.
[0030]
Furthermore, after measuring the load displacement of the front and rear surfaces 1a and 1b and the side surfaces 1c and 1d of the conveyed product 1, the conveyed product 1 is made to reach a predetermined position as shown in FIG.
[0031]
In this way, the load displacement of the front and rear surfaces 1a and 1b of the conveyed product 1 is measured and detected by the photoelectric sensor group 34 of the first monitoring gate 32, and the load displacement of both side surfaces 1c and 1d of the conveyed product 1 is conveyed. Since the photoelectric sensor group 39 of the second monitoring gate 37 measures and detects the forward direction and the backward direction of the transported object 1 through the rotation of the object 1, the measurement is performed on both detection lines along the transport direction. Thus, the load displacement of the front and rear surfaces 1a, 1b and the side surfaces 1c, 1d of the conveyed product 1 can be reliably detected without being affected by the size of the conveyed product 1 and the load displacement amount.
[0032]
Further, when the conveyed product 1 is separated from the roller conveyor 7 via the elevating unit 14 when the conveyed product 1 is rotated, the bottom surface of the conveyed product 1 is not scratched during the rotation, and the conveyed product 1 is easily scratched. It is possible to easily cope with the material and the like.
[0033]
The load displacement detection method and apparatus according to the present invention is not limited to the above-described embodiment, and the first area detection means and the second area detection means may be other detection means instead of the photoelectric sensor group. The first position detection means to the fourth position detection means may be any means as long as they sense the entry and exit of the conveyed product and operate the first area detection means and the second area detection means. Of course, other conveyors such as a slat conveyor and a belt conveyor may be used instead of the roller conveyor, and various modifications can be made without departing from the scope of the present invention.
[0034]
【The invention's effect】
As described above, according to the load displacement detection method and apparatus of the present invention, various excellent effects can be obtained as described below.
[0035]
I) The load displacement on the front and rear surfaces of the conveyed product is measured and detected by the first area detecting means, and the load displacement on both sides of the conveyed product is detected by the second area detecting means via the rotation of the conveyed product. Since the front and rear of the transfer direction are measured and detected, the measurement is not affected by the size and load displacement of the conveyed item, as measured by the detection lines on both sides along the transfer direction. It is possible to reliably detect the load displacement on the surface and both side surfaces.
[0036]
II) If the transported object is separated from the transfer means when rotating the transported object, the bottom surface of the transported object will not be scratched during rotation, and the material of the transported object that is easily scratched can be easily handled. Can do.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment for carrying out the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
3 is a view taken in the direction of arrows III-III in FIG.
FIG. 4 is a schematic view showing an elevating part of the elevating means.
FIG. 5 is a schematic view showing a rotating part of a rotating means.
FIG. 6A is a schematic diagram illustrating a state before a conveyed product enters the first monitoring gate in the embodiment for carrying out the present invention, and FIG. 6B is a schematic diagram illustrating a conveyed material enters the first monitoring gate. It is the schematic which shows the state which measures the front surface of a conveyed product by a photoelectric sensor group by this, (C) is a side view of (B), (D) is by a conveyed product leaving a 1st monitoring gate. It is the schematic which shows the state which measures the back surface of a conveyed product by a photoelectric sensor group, (E) is a side view of (D), (F) is the schematic which shows the state which the conveyed product stopped on the support stand. It is.
7 (A) to FIG. 6 (F), FIG. 7 (G) is a schematic view showing a state in which the conveyed product is separated from the roller conveyor, and FIG. 7 (H) is a diagram in which the conveyed product is rotated by a turntable. (I) is a schematic diagram showing a state where the conveyed product has returned to the roller conveyor, and (J) is conveyed by the photoelectric sensor group when the conveyed item enters the second monitoring gate. It is the schematic which shows the state which measures the front (one side of a conveyed product) of a thing, (K) is the back of a conveyed item (others of a conveyed item) by a photoelectric sensor group when a conveyed item approachs a 2nd monitoring gate. It is the schematic which shows the state after measuring the state which measures a side surface, (L) is the state after measuring the load slip of the front and back surface of a conveyed product, and both side surfaces.
FIG. 8 is an enlarged schematic view of a VIII portion in FIG. 6 (C).
FIG. 9 is an enlarged schematic diagram of the IX portion in FIG.
FIG. 10 is a flowchart showing the procedure of the embodiment for carrying out the load slippage detection method and apparatus of the present invention.
FIG. 11 is a flowchart showing the procedure of the embodiment continued from FIG. 10;
FIG. 12 is a flowchart showing the procedure of the embodiment following FIG.
FIG. 13 is a schematic side view showing a conventional load slippage detecting device.
FIG. 14 is a schematic side view showing a state in which a transported object smaller than a predetermined size is unloaded.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveyed object 1a Front surface of conveyed object 1b Rear surface of conveyed object 1c One side surface of conveyed object 1d Other side surface of conveyed object 7 Roller conveyor (transfer means)
14 Lifting part (lifting means)
21 Rotating part (Rotating means)
34 Photoelectric sensor group (first area detection means)
35 First position detection means 36 Second position detection means 39 Photoelectric sensor group (second area detection means)
40 Third position detecting means 41 Fourth position detecting means
43 first sensing line
44 second sensing line
46 third sense line
47 4th sensing line

Claims

When the front surface of the transported object enters the first sensing line of the first position detecting means as the transported object is transferred by the transporting means, the first position detecting means detects the ingress of the transported object and operates the first area detecting means. is allowed, by measuring the transport direction in front of conveyed by the first area detecting means, the front surface of the collapsing of the conveyed object is determined to collapsing when the above amount collapses permissible load,
In addition , when the rear surface of the transported object leaves the second sensing line of the second position detecting means as the transported object further moves, the second position detecting means detects the retreat of the transported object and operates the first area detecting means. is allowed, by measuring the transport direction behind the conveyed by the first area detecting means, collapsing of the rear surface of the conveyed object is determined to collapsing when the above amount collapses permissible load,
By rotating the transported object, the side surface of the transported object is directed back and forth in the transfer direction ,
When the front of the transported object enters the third sensing line of the third position detecting means along with the transport of the transported object, the third position detecting means senses the entrance of the transported object and activates the second area detecting means, Measure the front in the transfer direction of the transported object by the second area detecting means, and determine that the load slippage on one side of the transported object is greater than the allowable load slippage amount,
In addition , when the rear surface of the transported object leaves the fourth sensing line of the fourth position detecting means as the transported object further moves, the fourth position detecting means detects the retreat of the transported object and operates the second area detecting means. And the second area detecting means measures the rear of the transported object in the transfer direction, and determines that the load is shifted when the load shift on the other side of the transferred object is greater than or equal to the allowable load shift amount. .

Collapsing detection method according to claim 1, wherein for separating from the transfer means the transfer material when rotating the conveyed object.

Transport means for transporting the transported object ;
A first area detecting means for measuring the load load on the vertical line on the vertical line in the transfer direction ;
Conveyed when the front of the transported object enters the first sensing line as the transported object is moved so that the first area detection means measures the front of the transported object in the transport direction and detects the load displacement on the front surface of the transported object. First position detecting means for operating the first area detecting means by sensing the entry of an object ;
The rear surface of the transported object has left the second sensing line with the further transport of the transported object so that the first area detecting means measures the rearward direction of the transported object to detect the load slippage on the rear surface of the transported object. Second position detecting means for sometimes sensing the exit of the conveyed object and activating the first area detecting means ;
Rotating means for rotating the transported object to turn the side surface of the transported object back and forth in the transfer direction ;
A second area detecting means that is located downstream of the rotating means and that measures the load load on the vertical line on the vertical line in the transfer direction ;
When the front of the transported object enters the third sensing line with the transport of the transported object so that the second area detection means measures the front in the transport direction of the transported object and detects the load displacement on one side of the transported object. A third position detecting means for operating the second area detecting means by sensing the entry of the conveyed product ;
To detect the other side of the crumbling of the conveyed object by measuring the transport direction behind the conveyed object by the second area detecting means, with the transfer of further conveyed, the rear surface of the conveyed object is withdrawn from the fourth sensing line And a fourth position detecting means for operating the second area detecting means by sensing the retreat of the conveyed product when the load is detected.

4. The load displacement detecting device according to claim 3, further comprising lifting means for separating the conveyed product from the transfer means when rotating the conveyed product.