JP3830420B2

JP3830420B2 - Waterproof scale

Info

Publication number: JP3830420B2
Application number: JP2002138004A
Authority: JP
Inventors: 幸輝井上; 清志佐川
Original assignee: Tanita Corp
Current assignee: Tanita Corp
Priority date: 2002-05-14
Filing date: 2002-05-14
Publication date: 2006-10-04
Anticipated expiration: 2022-05-14
Also published as: JP2003329509A

Description

【０００１】
【発明の属する技術分野】
本発明は、非計量の際に、荷重伝達のためにケースの内側と外側を連通する開口部を密閉して防水状態とする防水型秤に関する。
【０００２】
【従来の技術】
従来、非計量の際における防水型秤のケース外部に設けられる計量皿とケース内部に設けられる荷重検出部とを結ぶ間に有するケースの開口部から水や埃等がケース内部に入らないようにする手段として、皿受け部材（計量皿）とケーシング（ケース）との間にベローズやダイヤフラムを設けたものが提案されている（実開平１−１１８３２８号公報、実開平４−９４５２４号公報、特開平１１−２５８０３２号公報参照）。
【０００３】
【発明が解決しようとする課題】
しかしながら、上述した皿受け部材（計量皿）とケーシング（ケース）との間にベローズやダイヤフラムが設けられた防水型の秤（特に低秤量タイプ）は、計量のために被計量物を計量皿に載せたときに変形したベローズやダイヤフラムの復元力が計量誤差等の精度劣化を引き起こすという問題があった。
【０００４】
そこで、本発明は、上記のような従来の問題点を解決することを目的とするもので、計量の際には精度低下を引き起こさずに計量でき、非計量の際には荷重伝達のためにケースの内側と外側を連通する開口部を密閉できる防水型秤を提供することを課題とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、本発明の防水型秤は、荷重伝達のために内側と外側を連通する開口部を有し計量物が積載されるケースと、前記ケースの内側に連なって設けられ前記ケースに積載される計量物から伝達される荷重を検出する荷重検出部と、前記荷重検出部に連なって設けられ前記ケースの内側から開口部を通って外側にかけて形成し前記ケースに積載される計量物から伝達される荷重を受ける脚と、前記ケースの開口部を計量の際に開き非計量の際に密閉する開閉手段とを備えることを特徴とする。
【０００６】
これによると、計量の際には、開閉手段によってケースの開口部が開かれるので、通常の状態で計量を行うことができ精度低下を引き起こさない。一方、非計量の際には、開閉手段によってケースの開口部が密閉されるので、水や埃の浸入を防ぐことができる。
【０００７】
また、前記開閉手段は、前記ケースに対して上下方向に前記脚を可動すると共にその上下方向における前記脚の位置の状態を保持する可動保持手段と、前記可動保持手段で前記脚を上方向に可動した位置の状態を保持する際に前記ケースの開口部を開封し前記可動保持手段で前記脚を下方向に可動した位置の状態を保持する際に前記ケースの開口部を密封する開密封部とから成ることを特徴とする。
【０００８】
これによると、可動保持手段で脚を上方向に可動した位置の状態を保持する際に開密封部によってケースの開口部が開封されるので、通常に計量を行うことができ精度低下を引き起こさない。一方、可動保持手段によって脚を下方向に可動した位置の状態が保持される際に開密封部によってケースの開口部が密封されるので、水や埃の浸入を防ぐことができる。
【０００９】
また、前記可動保持手段は、上下方向に摺動する面を有する前記脚と、前記荷重検出部に設けられる第１ベースと、前記第１ベースの下方に対向し前記ケースの内側に配置し前記脚に設けられる第２ベースと、前記第１ベースの下面に立設し摺動する面を有する支柱と、前記脚と前記支柱との間の少なくとも一箇所に設けられ上下方向に摺動する面を有する開閉スイッチと、前記第２ベースの上面に設けられ前記第２ベースに対して水平方向に可動する可動部と、前記第１ベースの下面に立設し非計量の際に前記可動部の上方向への可動を押さえ計量の際に前記可動部の水平方向への可動を押さえるストッパーと、前記可動部と前記開閉スイッチとをつなぎ前記開閉スイッチの可動に伴って前記可動部が所定の可動をするように変換する変換部と、前記脚及び前記開閉スイッチを押し返すように前記支柱に沿って設けられ所定の弾性力を有する圧縮ばねとから成り、前記開密封部は、前記脚が上方向へ所定の可動をした際に前記ケースと前記脚との間隙を開封し前記脚が下方向へ所定の可動をした際に前記ケースと前記脚との間隙を密封する位置となる前記ケース及び前記脚の少なくともいずれか一方側に設けられ柔軟で復元力を有する第１柔軟弾性部と、前記開閉スイッチが上方向へ所定の可動をした際に前記開閉スイッチと前記脚との間隙を開封し前記開閉スイッチが下方向へ所定の可動をした際に前記開閉スイッチと前記脚との間隙を密封する位置となる前記開閉スイッチ及び前記脚の少なくともいずれか一方側に設けられ柔軟で復元力を有する第２柔軟弾性部とから成ることを特徴とする。
【００１０】
これによると、本件防水型秤が設置面に置かれた際には、開閉スイッチが上方向に可動し、変換部がこの上方向の動きを水平方向の動きに変換し、可動部がこの水平方向の動きによって可動し、ストッパーが解放される。そして、更に脚が上方向に可動し、第１柔軟弾性部と第２柔軟弾性部とが開封し、支柱を介しての荷重伝達が可能となるので、通常に計量を行うことができ精度低下を引き起こさない。一方、本件防水型秤が設置面から離れた際には、圧縮ばねによって脚及びストッパーが下方向に可動し、変換部がこの下方向の動きを水平方向の動きに変換し、可動部がこの水平方向の動きによって可動し、ストッパーが上下方向に可動部を制限し、第１柔軟弾性部がケースと脚との間隙を密封し、第２柔軟弾性部が開閉スイッチと脚との間隙を密封するので、水や埃の浸入を防ぐことができる。
【００１１】
また、前記可動保持手段は、上下方向に摺動する面を有する前記脚と、前記荷重検出部に設けられる第１ベースと、前記第１ベースの下方に対向し前記ケースの内側に配置し前記脚に設けられる第２ベースと、前記第１ベースの下面に立設し摺動する面を有する支柱と、前記脚と前記支柱との間の少なくとも１ヶ所に設けられ上下方向に摺動する面を有する開閉スイッチと、前記第２ベースの上面に設けられ前記第２ベースに対して水平方向に可動する可動部と、前記第１ベースの下面に立設し非計量の際に前記可動部の上方向への可動を押さえ計量の際に前記可動部の水平方向への可動を押さえるストッパーと、前記可動部と前記開閉スイッチとをつなぎ前記開閉スイッチの可動に伴って前記可動部が所定の可動をするように変換する変換部と、前記支柱に設けられ所定の弾性力を有する圧縮ばねと、前記開閉スイッチと前記脚とが上下方向に摺動自在となるように前記開閉スイッチと前記脚との間隙を覆うように設けられ柔軟性を有する柔軟シート部とから成り、前記開密封部は、前記脚が上方向へ所定の可動をした際に前記ケースと前記脚との間隙を開封し前記脚が下方向へ所定の可動した際に前記ケースと前記脚との間隙を密封する位置となる前記ケース及び前記脚の少なくともいずれか一方側に設けられ柔軟で復元力を有する第１柔軟弾性部であることを特徴とする。
【００１２】
これによると、本件防水型秤が設置面に置かれた際には、柔軟シート部が柔軟性を有したまま、開閉スイッチが上方向に可動し、変換部がこの上方向の動きを水平方向の動きに変換し、可動部がこの水平方向の動きによって可動し、ストッパーが解放される。そして、更に脚が上方向に可動し、第１柔軟弾性部が開封し、支柱を介しての荷重伝達が可能となるので、通常に計量を行うことができ精度低下を引き起こさない。一方、本件防水型秤が設置面から離れた際には、圧縮ばねによって脚及びストッパーが下方向に可動し、変換部がこの下方向の動きを水平方向の動きに変換し、可動部がこの水平方向の動きによって可動し、ストッパーが上下方向に可動部を制限し、第１柔軟弾性部がケースと脚との間隙を密封すると共に、柔軟シート部が開閉スイッチと脚との間隙を覆うので、水や埃の浸入を防ぐことができる。
【００１３】
また、前記可動保持手段は、上下方向に摺動する面を有する前記脚と、前記荷重検出部に設けられる第１ベースと、前記第１ベースの下方に対向し前記ケースの内側に配置し前記脚に設けられる第２ベースと、前記第１ベースの下面に立設し摺動する面を有する支柱と、前記第２ベースの上面に設けられ前記第２ベースに対して水平方向に可動する可動部と、前記可動部に設けられ前記ケースの内側から開口部を通って外側にかけて軸を形成するつまみと、前記ケースの内側に設けられ対向面を有する固定ブロックと、前記可動部に設けられ対向面を有し前記可動部が所定の可動をした際にこの対向面と前記固定ブロックの対向面とが接して下方向に押し下げられる位置に配置する可動ブロックと、前記固定ブロックと前記可動ブロックとの対向面同士が接して前記可動ブロックが下方向に押し下げられる位置の状態及び前記固定ブロックと前記可動ブロックとが離れている位置の状態を保持する保持部とから成り、前記開密封部は、前記脚が上方向へ所定の可動をした際に前記ケースと前記脚との間隙を開封し前記脚が下方向へ所定の可動をした際に前記ケースと前記脚との間隙を密封する位置となる前記ケース及び前記脚の少なくともいずれか一方側に設けられ柔軟で復元力を有する第１柔軟弾性部と、前記脚が上方向へ所定の可動をした際に前記ケースと前記つまみとの間隙を開封し前記脚が下方向へ所定の可動をした際に前記ケースと前記つまみとの間隙を密封する位置となる前記ケース及び前記つまみの少なくともいずれか一方側に設けられ柔軟で復元力を有する第３柔軟弾性部とから成ることを特徴とする。
【００１４】
これによると、つまみを作動することによって可動部が水平方向に可動し、可動ブロックが固定ブロックと接して下方向に押し下げられ、その位置の状態が保持部によって保持される。その際には、第１柔軟弾性部によってケースと脚との間隙が密封され、第３柔軟弾性部によってケースとつまみとの間隙が密封されるので、水や埃の浸入を防ぐことができる。一方、つまみを作動することによって可動部が水平方向に可動し、固定ブロックと可動ブロックとが離れた状態にもなり、その位置の状態が保持部によって保持される。その際には、脚が上方向に可動し、第１柔軟弾性部と第３柔軟弾性部とが開封し、支柱を介しての荷重伝達が可能となるので、通常に計量を行うことができ精度低下を引き起こさない。
【００１５】
また、前記開閉スイッチと前記可動部と前記変換部と前記ストッパーとは、前記脚毎に設けられることを特徴とする。
【００１６】
これによると、非計量の際にすべての脚の個数に対応した複数のストッパーによって、可動部すなわち脚の上方向への可動を押さえているので、外側から脚が押された際の脚とケースとの間隙の発生を強固に防ぐことができる。
【００１７】
また、前記ストッパーは、これと係わらない前記脚の近くに設けられることを特徴とする。
【００１８】
これによると、ある１ヶ所の開閉スイッチが押された際に、この開閉スイッチと係わる脚が、この開閉スイッチと係わらないストッパーによって上方向への可動を押さえられるので、脚とケースとの間隙の発生を防ぐことができる。
【００１９】
また、前記第１柔軟弾性部は、前記ケースの内側から外側にかけて先端の狭まる斜面を有する錐状体を形成し前記脚の側面に一周して設けられ、前記ケースは、前記第１柔軟弾性部の錐状体の斜面に平行する斜面を開口部の端面に一周して形成することを特徴とする。
【００２０】
また、前記脚は、前記ケースの内側から外側にかけて先端の狭まる傾斜を側面に一周して形成し、前記第１柔軟弾性部は、前記脚の側面の斜面に平行する斜面体を形成し前記ケースの開口部の端面に一周して設けられることを特徴とする。
【００２１】
また、前記第１柔軟弾性部は、前記ケースの内側から外側にかけて先端の狭まる斜面を有する錐状体を形成し前記脚の側面に一周して設けられると共に、前記脚の側面を一周して設けられる錐状体の斜面に平行する斜面体を形成し前記ケースの開口部の端面に一周して設けられることを特徴とする。
【００２２】
これらによると、脚の側面にはケースの内側から外側にかけて先端の狭まる斜面を有するので、ケースと脚との間隙が開封された際に、そこに付着していた水滴は、この斜面を伝わってケースの外側に流れる。したがって、ケースと脚との間隙が開封された際のケースの内側への水滴の浸入を防ぐことができる。
【００２３】
また、前記第２柔軟弾性部は、前記ケースの内側から外側にかけて先端の狭まる斜面を有する錐状体を形成し前記開閉スイッチの前記脚と摺動する面に一周して設けられ、前記開閉スイッチと摺動する前記脚は、前記柔軟弾性部の錐状体の斜面に平行する斜面を摺動する面に一周して形成することを特徴とする。
【００２４】
また、前記開閉スイッチは、前記ケースの内側から外側にかけて先端の狭まる斜面を前記脚と摺動する面に一周して形成し、前記第２柔軟弾性部は、前記開閉スイッチの錐状体の斜面に平行する斜面体を形成し前記脚の摺動する面に一周して設けられることを特徴とする。
【００２５】
また、前記第２柔軟弾性部は、前記ケースの内側から外側にかけて先端の狭まる斜面を有する錐状体を形成し前記開閉スイッチの前記脚と摺動する面に一周して設けられると共に、前記開閉スイッチの錐状体の斜面に平行する斜面体を形成し前記脚の摺動する面に一周して設けられることを特徴とする。
【００２６】
これらによると、開閉スイッチの摺動する面にはケースの内側から外側にかけて先端の狭まる斜面を有するので、開閉スイッチと脚との間隙が開封された際に、そこに付着していた水滴は、この斜面を伝わってケースの外側に流れる。したがって、開閉スイッチと脚との間隙が開封された際のケースの内側への水滴の浸入を防ぐことができる。
【００２７】
また、前記第３柔軟弾性部は、前記ケースの内側から外側にかけて先端の狭まる斜面を有する錐状体を形成し前記つまみの可動軸の側面に一周して設けられ、前記ケースは、前記柔軟弾性部の錐状体の斜面に平行する斜面を開口部の端面に一周して形成することを特徴とする。
【００２８】
また、前記つまみは、前記ケースの内側から外側にかけて先端の狭まる斜面を可動軸の側面に一周して形成し、前記第３柔軟弾性部は、前記つまみの可動軸の側面の斜面に平行する斜面体を形成し前記ケースの開口部の端面に一周して設けられることを特徴とする。
【００２９】
また、前記第３柔軟弾性部は、前記ケースの内側から外側にかけて先端の狭まる斜面を有する錐状体を形成し前記つまみの可動軸の側面に一周して設けられると共に、前記つまみの可動軸の側面に設けられる錐状体の斜面に平行する斜面体を形成し前記ケースの開口部の端面に一周して設けられることを特徴とする。
【００３０】
これらによると、つまみの可動軸の側面にはケースの内側から外側にかけて先端の狭まる斜面を有するので、ケースとつまみとの間隙が開封された際に、そこに付着していた水滴は、この斜面を伝わってケースの外側に流れる。したがって、開閉スイッチとつまみとの間隙が開封された際のケースの内側への水滴の浸入を防ぐことができる。
【００３１】
また、前記第１柔軟弾性部は、前記脚の可動方向に先端が狭まる形状を成し、前記ケースの開口部の周端部の上面と前記周端部の上面に対向する前記第２ベースとの間に設けられることを特徴とする。
【００３２】
また、前記第２柔軟弾性部は、前記脚の可動方向に先端が狭まる形状を成し、前記脚の上面と前記脚の上面に対向する前記開閉スイッチとの間に設けられることを特徴とする。
【００３３】
また、前記第３柔軟弾性部は、前記脚の可動方向に先端が狭まる形状を成し、前記ケースの開口部の周端部の上面と前記周端部の上面に対向する前記第２ベースとの間に設けられることを特徴とする。
【００３４】
これらによると、脚の可動方向に先端が狭まる形状の先端部分が各上面と接触して押された際に大きな変形を伴いながら密封するので、確実に水や埃の浸入を防ぐことができる。
【００３５】
【発明の実施の形態】
以下、本発明の実施の形態について図面を用いて説明する。
【００３６】
まず初めに、床やテーブル等の設置面から離れた際に、自動的にケースと脚との間隙を密封する態様である第１の実施の形態について詳述する。
【００３７】
図１に本発明に係わる防水型秤の外観を斜視図に、図２に設置面に配置される前の状態を断面図に、図３に設置面に配置途中の状態を断面図に、図４に設置面に配置された状態を断面図に、図５に設置面に配置される前の状態から抜粋した内部機構を斜視図に、図６に設置面に配置途中の状態から抜粋した内部機構を斜視図に、図７に設置面に配置された状態から抜粋した内部機構を斜視図に示す。
【００３８】
本発明における第１の実施の形態の防水型秤は、荷重伝達のために内側と外側を連通する開口部ａを４ヵ所に有し計量物が積載されるケース１と４つの脚１６、１７とで秤の外形を形成する。このケース１には、樹脂・ダイカスト・板金等の成形品が用いられる。
【００３９】
このケース１の表面には、電源スイッチ２と表示部３とを備える。また、ケース１の内部には、荷重検出部４、第１ベース５、支柱６、７、ストッパー８、第２ベース９、可動部１０、変換部１１、圧縮ばね１２、１３、第１柔軟弾性部１４、第２柔軟弾性部１５、計測処理部（図示省略）及び電源（図示省略）を備える。更に、ケース１の内側から外側にかけて脚１６、１７と開閉スイッチ１８とを備える。
【００４０】
電源は、電気系各部への電力の供給源である。この電源には、乾電池、ＡＣアダプター又はソーラーバッテリー等が用いられる。電源スイッチ２は、電源の入切をする。
【００４１】
荷重検出部４は、ケース１の内側に連なって設けられケース１に積載される計量物から伝達される荷重を検出する。この荷重検出部４には、静電容量式・電気抵抗線式等のロバーバル機構のセンサーが用いられる。
【００４２】
計測処理部は、荷重検出部４で検出される荷重信号に基づいて計量値等の結果を求めて出力する。この計測処理部には、増幅回路・Ａ／Ｄ変換回路・記憶装置・ＣＰＵ等が実装された公知の電子基板ユニットが用いられる。
【００４３】
表示部３は、計測処理部で出力された計量値等の結果を表示する。この表示部３には、ＬＣＤ又はＬＥＤ等が用いられる。
【００４４】
第１ベース５は、荷重検出部４に連なって設けられ、剛性の高い平板状体から成る。支柱６、７は、摺動する面を有し第１ベース５の下面の４ヵ所（支柱６が３ヵ所（その内の２箇所は図示省略）、支柱７が１箇所）にケース１の開口部ａに向かって立設する。第２ベース８は、第１ベース５の下方に対向して配置し、剛性の高い平板状体から成る。
【００４５】
脚１６、１７は、上下方向に摺動する面を有すると共にケース１の内側から開口部ａを通って外側にかけて形成し、第２ベース９の４ヵ所（脚１６が３ヵ所（その内の２箇所は図示省略）、脚１７が１箇所）に設けられる。そして、このうちの３ヵ所の脚１６は、この上下方向に摺動する面についてを３ヵ所の支柱６の上下方向に摺動する面に摺接する。
【００４６】
開閉スイッチ１８は、上下方向に摺動する面を内側と外側に有して形成する。そして、外側の上下方向に摺動する面については、１ヶ所の脚１７の上下方向に摺動する面に摺接する。また、内側の上下方向に摺動する面については、１ヵ所の支柱７の上下方向に摺動する面に摺接する。
【００４７】
圧縮ばね１２、１３は、所定の弾性力を有する。そして、圧縮ばね１２は、第１ベース５と３ヶ所の脚１６との間の３ヵ所の支柱６に沿って設けられる。また、圧縮ばね１３は、第１ベース５と１ヶ所の脚１７との間の１ヵ所の支柱７に沿って設けられる。なお、ここで所定の弾性力とは、本件の防水型秤を計量のため設置面Ｆに置いた際に、脚１６、１７、開閉スイッチ１８、第２ベース９、可動部１０、変換部１１を除いた各部を合計した自重によって、脚１６及び開閉スイッチ１８と支柱６、７とが摺動し、ケース１の開口部ａが開封状態となるまでに、脚１６、１７及び開閉スイッチ１８が上方向（又はケース１が下方向）に可動することが可能なばね定数である。かつ、本件の防水型秤を非計量のため設置面Ｆから離して保持した際に、脚１６及び開閉スイッチ１８と支柱６、７とが逆に摺動し、ケース１の開口部ａが密封状態となるまでに、脚１６、１７及び開閉スイッチ１８が下方向（又はケース１が上方向）に可動することが可能なばね定数である。
【００４８】
可動部１０は、上下方向に孔ｂを有する長手状板であり、第２ベース９の上面を水平方向に直線的に摺接する。ストッパー８は、非計量の際に可動部１０の上面と接する長さで、計量の際に可動部１０の孔ｂの側面と接するような太さの棒状体で第１ベース５の下面に立設する。
【００４９】
変換部１１は、可動部１０と開閉スイッチ１８とを連結するＬ型リンク片１１ａと、このＬ型リンク片１１ａのコーナー部を回動自在に支持し第２ベース９に立設するＬ型リンク片用軸柱１１ｂとから成り、開閉スイッチ１８の可動に伴って可動部１０が所定の可動をする。なお、ここで所定の可動とは、ケース１が設置場所に置かれて設置面Ｆと接する脚１７及び開閉スイッチ１８の面が同一平面上になった場合（図３、４、６、７）には、可動部１０の孔ｂとストッパー８との位置が一致し、ケース１が設置場所から持ち上げられて脚１７及び開閉スイッチ１８の面が同一平面上でなくなった場合（図２、５）には、可動部１０の孔ｂから外れた位置となる動きをいう。また、Ｌ型リンク片１１ａにおける可動部１０と開閉スイッチ１８と連結する部分は、可動部１０と開閉スイッチ１８とが円滑に可動するような適度な自由度を有する。
【００５０】
第１柔軟弾性部１４は、柔軟で復元力を有する。そして、脚１６、１７が上方向へ所定の可動をした際にケース１と脚１６、１７との間隙（ケース１の開口部ａ）を開封し、脚１６，１７が下方向へ所定の可動をした際にケース１と脚１６、１７との間隙（ケース１の開口部ａ）を密封する脚側の位置に設けられる。なお、ここで所定の可動とは、圧縮ばね１２、１３の所定の弾性力の作用によって生ずる可動をいう。
【００５１】
第２柔軟弾性部１５は、柔軟で復元力を有する。そして、開閉スイッチ１８が上方向へ所定の可動をした際に開閉スイッチ１８と脚１７との間隙（ケース１の開口部ａ）を開封し、開閉スイッチ１８が下方向へ所定の可動をした際に開閉スイッチ１８と脚１７との間隙（ケース１の開口部ａ）を密封する開閉スイッチ側の位置に設けられる。なお、ここで所定の可動とは、圧縮ばね１３の所定の弾性力の作用によって生ずる可動をいう。
【００５２】
なお、上述したうちの第１ベース５、支柱６、７、ストッパー８、第２ベース９、可動部１０、変換部１１、圧縮ばね１２、１３、脚１６、１７及び開閉スイッチ１８によって、ケース１に対して上下方向に脚１６、１７を可動すると共にその上下方向における脚１６、１７の位置の状態を保持する可動保持手段を構成する。
【００５３】
また、第１柔軟弾性部１４と第２柔軟弾性部１５とによって、可動保持手段で脚１６，１７を上方向に可動した位置の状態を保持する際にケース１の開口部ａを開封し、可動保持手段で脚１６，１７を下方向に可動した位置の状態を保持する際にケース１の開口部ａを密封する開密封部を構成する。
【００５４】
第１の実施の形態の防水型秤は、上述のように構成され、次のような使用及び取扱いに伴って防水あるいは非防水の状態となる動作をする。
【００５５】
第１の実施の形態の防水型秤は、ケース１を床やテーブル等の設置面Ｆから離して保持することによって、可動保持手段が自動的に作動して、図２に示すようにケースの開口部ａが密封された防水状態となる。
【００５６】
この防水状態とするための可動保持手段の自動的な作動について詳述する。脚１６、１７及び開閉スイッチ１８が設置面Ｆから離れることによって、第１ベース５と脚１６との間の圧縮ばね１２が脚１６を、第１ベース５と開閉スイッチ１８との間の圧縮ばね１３が開閉スイッチ１８をケース１に対して下方向に押す。これによって、脚１６、１７、開閉スイッチ１８、第２ベース９、変換部１１、可動部１０及び第１柔軟弾性部１４は、一様にケースに対して下方向に下がる。その際、脚側に設けられている第１柔軟弾性部１４が、ケース１と脚１６、１７との間隙を密封する。また、開閉スイッチ側に設けられている第２柔軟弾性部１５が、脚１７と開閉スイッチ１８との間隙を密封する。すなわち、ケース１と脚１６、１７との間隙及び脚１７と開閉スイッチ１８との間隙の部位を示すケースの開口部ａが密封された防水状態となる。
【００５７】
一方、第１の実施の形態の防水型秤は、計量する場合には、床やテーブル等の設置面Ｆに置くことによって、可動保持手段が自動的に作動して、図４に示すようにケース１の開口部ａが開封された非防水状態となり、公知の一般的な秤と同様に電源スイッチ２を押して電源を入れ、計量物をケース１に載せることによって使用可能となる。
【００５８】
この非防水状態とするための可動保持手段の自動的な作動について詳述する。設置面Ｆに置くことによって、まず、図３及び図６に示すように、脚１６、１７、開閉スイッチ１８、第２ベース９、可動部１０、変換部１１を除いた各部を合計した自重によって、開閉スイッチ１８がケース１に対して上方向に可動する。この開閉スイッチ１８の移動に伴って、Ｌ型リンク片１１ａがコーナー部を中心として回動する。このＬ型リンク片１１ａの回動に伴って、可動部１０が第２ベース９の上面上を水平方向に移動する。そして、設置面Ｆと接する脚１７の底面と開閉スイッチ１８の底面とが同一平面上になった際に、可動部１０の孔ｂとストッパー８との位置が一致する。
【００５９】
続いて、図４及び図７に示すように、設置面Ｆと接する脚１７の底面と開閉スイッチ１８の底面とが同一平面上のまま更に、脚１６、１７、開閉スイッチ１８、第２ベース９、可動部１０、変換部１１、圧縮ばね１２、１３、第１柔軟弾性部１４及び第２柔軟弾性部１５を除いた各部を合計した自重によって、脚１６、１７もケース１に対して上方向に可動する。この脚１６、１７の移動に伴って、ストッパー８は可動部１０の孔ｂに挿入する。脚１６の摺接する面の底と支柱６の摺接する面の端及び開閉スイッチ１８の摺接する面の底と支柱７の摺接する面の端とが当接することで、ケース１に対する上方向への可動が止まる。その際、脚側に設けられている第１柔軟弾性部１４が、ケース１と脚１６、１７との間隙を開封する。また、開閉スイッチ側に設けられている第２柔軟弾性部１５が、脚１７と開閉スイッチ１８との間隙を開封する。すなわち、ケース１と脚１６、１７との間隙及び脚１７と開閉スイッチ１８との間隙の部位を示すケース１の開口部ａが開封された非防水状態となる。
【００６０】
そして、この非防水状態の状態で、ケース１に計量物を載せることにより、荷重検出部４の一端側へと荷重が伝わると共に、設置面Ｆから脚１６、１７及び開閉スイッチ１８へ、この脚１６、１７及び開閉スイッチ１８から支柱６、７へ、この支柱６、７から第１ベース５へ、この第１ベース５から荷重検出部４の他端側へと荷重に対する反力が伝わり、公知の秤と同様に正常に測定ができる。
【００６１】
なお、先の防水状態とするための可動保持手段の自動的な作動についてで説明したようにケース１を床やテーブル等の設置面Ｆから離して保持することによって、各部が非防水状態への動作と逆の動作をして非防水状態から防水状態となる。
【００６２】
上述においては、開閉スイッチ１８と可動部１０と変換部１１とストッパー８とは、４ヵ所の脚１６、１７のうち１ヵ所の脚１７に設けたが、他の３ヵ所の脚１６にも設けてもよい。換言すると、１ヵ所以上ならば実施可能である。そして、すべての脚１６、１７に設けられることが最良である。これによると、非計量の際にすべての脚１６、１７の個数に対応した複数のストッパー８によって、可動部１０すなわち脚１６、１７の上方向への可動を押さえているので、外側から脚１６、１７が押された際の脚１６、１７とケース１との間隙の発生を強固に防ぐことができる。
【００６３】
また、上述において、ストッパー８は、可動部１０と変換部１１と開閉スイッチ１８とを中間として、一連につながる脚１７とは別の脚１６の近くに位置するが、一連につながる脚１７の近くに位置してもも実施可能である。ただし、ストッパー８が別の脚１６の近くに位置する場合の方が、ある１ヶ所の開閉スイッチ１８が押された際に、この開閉スイッチ１８と一連につながる脚１７は、この開閉スイッチ１８と一連につながらないストッパーによって上方向への可動が押さえられるので、脚１７とケース１との間隙の発生を防ぐことができる。
【００６４】
上述した基本例のように、床やテーブル等の設置面Ｆから離れた際に、自動的にケース１と脚１６、１７との間隙及び脚１７と開閉スイッチ１８との間隙が密封する態様の第１の実施の形態の防水型秤は、次のような変形例のような態様であっても同様に実施可能である。
【００６５】
その変形例の一つめ（変形例１）として、図８に設置面に配置される前の状態を断面図に、図９に設置面に配置途中の状態を断面図に、図１０に設置面に配置された状態を断面図に、図１１に設置面に配置される前の状態から抜粋した内部機構を斜視図に、図１２に設置面に配置途中の状態から抜粋した内部機構を斜視図に、図１３に設置面に配置された状態のから抜粋した内部機構を斜視図に示す。なお、この変形例１では、図面中、基本例と同じ部分については同じ符号を付し、基本例と異なる部分については異なる符合を付すと共に、基本例と異なる部分についてのみ詳述する。
【００６６】
支柱３７は、その摺動する面に上下方向に直線を有する直状凸部３７ａを形成する。開閉スイッチ４８は、この支柱３７の凸部３７ａにより誘導される凹部を内側に有する。可動部４０は、上下方向に孔ｃを有する扇形状板であり、開閉スイッチ４８を中心として水平方向に回転することにより第２ベース９の上面を水平方向に摺接する。変換部４１は、開閉スイッチ４８の外側の摺動する面に上下方向に形成される緩やかな曲を有する曲状凸部４１ａと、開閉スイッチ４８の外側の摺動する面と摺接して曲状凸部４１ａにより誘導される凹部を内側に有し可動部３０の回転中心部に形成されるリング状部４１ｂとから成る。
【００６７】
このように構成することで、支柱３７の摺動する面を直状凸部３７ａに沿って開閉スイッチ４８が上下方向への可動する。これに伴って、開閉スイッチ４８に形成される凸部４１ａにリング状部４１ｂの凹部が誘導されて可動部３０が第２ベース９の上面上を水平方向に移動する。
【００６８】
そして、この際、設置面Ｆと接する脚１７の底面と開閉スイッチ４８の底面とが同一平面上にない場合には、ストッパー８は可動部４０の上面に接する（図８、図１１）。また、開閉スイッチ４８だけがケース１に対して上方向に可動し、設置面Ｆと接する脚１７の底面と開閉スイッチ４８の底面とが同一平面上になった場合には、可動部４０の孔ｃとストッパー８との位置が一致する（図９、図１２）。更に、脚１６、１７もケース１に対して上方向に可動することによって、ストッパー８は可動部４０の孔ｃに挿入する（図１０、図１３）。したがって、同様に防水・非防水の状態を得ることができる。
【００６９】
また、変形例の二つめ（変形例２）として、図１４に設置面に配置される前の状態を斜視図に、図１５に設置面に配置途中の状態を斜視図に、図１６に設置面に配置された状態を斜視図に、図１７に第２ベースと可動部との回転部の部分半断面図に示す。なお、この変形例２では、図面中、基本例と同じ部分については同じ符号を付し、基本例と異なる部分については異なる符合を付すと共に、基本例と異なる部分についてのみ詳述する。
【００７０】
第２ベース６９は、上面の中央に回転軸６９ａを有する。可動部７０は、上下方向に孔ｄを有する円状板７０ａと、内側が回転軸６９ａと摺接し外側を波状に形成し円状板の中央に設けられる回転軸受け７０ｂとから成る。
【００７１】
変換部７１は、開閉スイッチ７８と一端部を接続するＬ型リンク片７１ａと、このＬ型リンク片７１ａのコーナー部を回動自在に支持し第２ベース６９に立設するＬ型リンク片用軸柱７１ｂと、Ｌ型リンク片７１ａの他端部に回動自在に一端部を連結するＩ型リンク片７１ｃと、このＩ型リンク片７１ｃの他端部に回動自在に一端部を連結し回転軸受け７０ｂの波状部と噛み合う波状部を有する波状片７１ｄと、第２ベース６９に立設し波状片７１ｄの回転中心部を回転自在に支持する波状片用軸柱７１ｅと、波状片７１ｄの他端部を引っ張る引張ばね７１ｆと、第２ベース６９に立設し引張ばね７１ｆの一端を固定するばね用柱７１ｇとから成る。
【００７２】
このように構成することで、開閉スイッチ７８の上下方向への可動に伴って、Ｌ型リンク片７１ａがコーナー部を中心として回動する。そして、このＬ型リンク片７１ａの回動に伴って、Ｉ型リンク片７１ｃが水平方向に可動する。更に、このＩ型リンク片７１ｃの回動に伴って、波状片７１ｄが回転中心部を中心として回動する。また更に、この波状片７１ｄの回動に伴って、回転軸受け７０ｂが追従して可動部７０が回動する。なお、開閉スイッチ７８が上方向へ可動した際には、引張ばね７１ｆは更に伸び、開閉スイッチ７８が上方向へ可動した際に可動部７０を回転しながら波状片７１ｄを引き戻す作用をする。
【００７３】
そして、この際、設置面Ｆと接する脚１７の底面と開閉スイッチ７８の底面とが同一平面上にない場合には、ストッパー８は可動部７０の上面に接する。また、開閉スイッチ７８だけがケース１に対して上方向に可動し、設置面Ｆと接する脚１７の底面と開閉スイッチ７８の底面とが同一平面上になった場合には、可動部７０の孔ｄとストッパー８との位置が一致する（図１５）。更に、脚１６、１７もケース１に対して上方向に可動することによって、ストッパー８は可動部７０の孔ｄに挿入する（図１６）。したがって、同様に防水・非防水の状態を得ることができる。
【００７４】
次に、手動的にケースと脚との間隙を密封する態様である第２の実施の形態について詳述する。
【００７５】
図１８に本発明に係わる防水型秤の防水状態の際の状態を斜視図に、図１９に防水状態の際のケースの開口部を部分断面図に、図２０に保持部の詳細を部分拡大図に、図２１に本発明に係わる防水型秤の非防水状態の際の状態を斜視図に、図２２に非防水状態の際のケースの開口部を部分断面図に示す。
【００７６】
本発明における第２の実施の形態の防水型秤は、荷重伝達のために内側と外側を連通する開口部ｅを５ヵ所に有し計量物が積載されるケース９１と４つの脚１１６と１つのつまみ１１０とで秤の外形を形成する。このケース９１には、樹脂・ダイカスト・板金等の成形品が用いられる。
【００７７】
このケース９１の表面には、第１の実施の形態と同様に電源スイッチ（図示省略）と表示部（図示省略）とを備える。また、ケース９１の内部には、荷重検出部９４、第１ベース９５、支柱９６、第２ベース９９、可動部１００、つまみ１１０、固定ブロック１１１、可動ブロック１１２、保持部１１３、第１柔軟弾性部１０４、第３柔軟弾性部１１４、計測処理部（図示省略）及び電源（図示省略）を備える。更に、ケース９１の内側から外側にかけて脚１１６を備える。
【００７８】
電源、電源スイッチ、荷重検出部９４、支柱９６、計測処理部、表示部、第１ベース９５、脚１１６及び第１柔軟弾性部１０４は、第１の実施の形態と同様であるので説明を省略する。
【００７９】
固定ブロック１１１は、対向面を有しケース９１の内側に固設される。第２ベース９９は、第１ベース９５の下方に対向して配置し、中央に軸孔を有し、剛性の高い平板状体から成る。可動部１００は、円状板から成る。
【００８０】
つまみ１１０は、可動部１００の下面の中央部から第２ベース９９の軸孔を通ってケースの外側にかけて形成する可動軸１１０ａと、可動部１００の下面の中央部から第２ベース９９の軸孔を通過した部分に形成するリング状片１１０ｂと、可動軸１１０ａの先端に形成するつかみ片１１０ｃとから成る。
【００８１】
可動ブロック１１２は、対向面を有し、可動部１００を可動をした際にこの対向面と固定ブロック１１１の対向面とが接して下方向に押し下げられる位置となるように可動部１００に固設される。
【００８２】
保持部１１３は、可動部１００の下面に設けられる凹部１１３ａと、この凹部の溝に設けられる小ばね１１３ｂとボール１１３ｃと、固定ブロック１１１と可動ブロック１１２との対向面同士が接して可動ブロック１１２が下方向に押し下げられる際に凹部１１３ａと対向する位置及び固定ブロック１１１と可動ブロック１１２とが離れている際に凹部１１３ａと対向する位置となる第２ベース９９の上面に設けられた２つの円弧溝１１３ｄとから成る。
【００８３】
第３柔軟弾性部１１４は、柔軟で復元力を有する。そして、脚１１６が上方向へ所定の可動をした際にケース９１とつまみ１１０との間隙を開封し、脚１１６が下方向へ所定の可動をした際にケース９１とつまみ１１０との間隙を密封するつまみ側の位置に設けられる。
【００８４】
なお、上述したうちの第１ベース９５、支柱９６、第２ベース９９、可動部１００、固定ブロック１１１、可動ブロック１１２、つまみ１１０、保持部１１３及び脚１１６によって、ケース９１に対して上下方向に脚１１６を可動すると共にその上下方向における脚１１６の位置の状態を保持する可動保持手段を構成する。
【００８５】
また、第１柔軟弾性部１０４と第３柔軟弾性部１１４とによって、可動保持手段で脚１１６を上方向に可動した位置の状態を保持する際にケース９１の開口部ｅを開封し、可動保持手段で脚１１６を下方向に可動した位置の状態を保持する際に前記ケース９１の開口部ｅを密封する開密封部を構成する。
【００８６】
第２の実施の形態の防水型秤は、上述のように構成され、次のような使用及び取扱いに伴って防水あるいは非防水の状態となる動作をする。
【００８７】
図１８、図１９に示すように、まず、ケース９１の開口部ｅが密封された防水状態への動作について詳述する。ケース９１を保持しながらつまみ１１０を一定以上の力で右回りに回すことによって、小ばね１１３ｂが撓んでボール１１３ｃが第２ベース９９の上面に設けられている円弧溝１１３ｄから外れると共に可動部１００が回転する。そして、可動部１１０に伴って動く可動ブロック１１２の対向面が固定ブロック１１１の対向面と接した状態となった位置で、ボール１１３ｃが第２ベース９９の上面に設けられている先の円弧溝１１３ｄとは別の円弧溝１１３ｄと嵌合する。
【００８８】
これによって、脚１１６、第２ベース９９、つまみ１１０、第１柔軟弾性部１０４及び第３柔軟弾性部１１４は、一様にケース９１に対して下方向に下がる。その際、脚側に設けられている第１柔軟弾性部１０４が、ケース９１と脚１１６との間隙を密封する。また、つまみ側に設けられている第３柔軟弾性部１１４が、ケース９１とつまみ１１０との間隙を密封する。更に、可動部１００は、ボール１１３ｃと別の円弧溝１１３ｄとの嵌合によって、一定以上の水平力が加わらないと回転しないでその状態を維持する。すなわち、ケース９１と脚１１６との間隙及びケース９１とつまみ１１０との間隙の部位を示すケースの開口部ｅが密封された防水状態となる。
【００８９】
一方、図２１、図２２に示すように、ケース９１の開口部ｅが開封された非防水状態への動作について詳述する。ケース９１を保持しながらつまみ１１０を一定以上の力で左回りに回すことによって、小ばね１１３ｂが撓んでボール１１３ｃが第２ベース９９の上面に設けられている別の円弧溝１１３ｄから外れると共に可動部１００が回転する。そして、可動部１００に伴って動く可動ブロック１１２の対向面が固定ブロック１１１の対向面と離れた状態となった位置で、ボール１１３ｃが第２ベース９９の上面に設けられている先の円弧溝１１３ｄと嵌合する。
【００９０】
これによって、脚１１６、第２ベース９９、つまみ１１０、第１柔軟弾性部１０４及び第３柔軟弾性部１１４は、一様にケース９１に対して下方向に下がる。その際、脚側に設けられている第１柔軟弾性部１０４が、ケース９１と脚との間隙を開封する。また、つまみ側に設けられている第３柔軟弾性部１１４が、ケース９１とつまみ１１０との間隙を開封する。更に、可動部１００は、ボール１１３ｃと先の円弧溝１１３ｄとの嵌合によって、一定以上の水平力が加わらないと回転しないでその状態を維持する。すなわち、設置面Ｆに置かれた際には、ケース９１と脚１１６との間隙及びケース９１とつまみ１１０との間隙の部位を示すケース９１の開口部ｅが開封された非防水状態となり、公知の秤と同様に測定できる。
【００９１】
以上、本発明の防水型秤は、第１、第２の実施の形態で説明したようなものであるが、ケース１、９１の開口部ａ、ｅの部分については、図２３乃至図３１に示すような形態であっても実施可能である。
【００９２】
図２３は、第２柔軟弾性部に変わるものを用いた態様を示す。開閉スイッチ１３１と脚１３２とが上下方向に摺動自在となるように開閉スイッチ１３１と脚１３２との間隙を柔軟シート部１３３で常に覆う。これによると、脚１３２に対して開閉スイッチ１３１が下方向に可動しても（図２３（ａ））、上方向に可動しても（図２３（ｂ））常に開閉スイッチ１３１と脚１３２との間隙は塞がれ、この部位からの水や埃の浸入を防ぐことができる。
【００９３】
図２４は、第１及び第２柔軟弾性部の形状を変形させた態様を示す。ケース１（又は９１）の内側から外側にかけて先端の狭まる斜面を有する錐状体状の第１柔軟弾性部１３４を脚１３７の側面に一周して設ける。また、ケース１（又は９１）の内側から外側にかけて先端の狭まる斜面を有する錐状体状の第２柔軟弾性部１３５を開閉スイッチ１３６の脚１３７と摺動する面に一周して設ける。一方、これらの錐状体の斜面に平行する斜面をケース１（又は９１）の開口部ａの端面と脚１３７の摺動する面に形成する。
【００９４】
図２５は、第３柔軟弾性部の形状を変形させた態様を示す。ケース９１の内側から外側にかけて先端の狭まる斜面を有する錐状体状の第３柔軟弾性部１３８をつまみ１３９の可動軸の側面に一周して設ける。また、この錐状体の斜面に平行する斜面をケース９１の開口部ｅの端面に形成する。
【００９５】
図２６は、第１及び第２柔軟弾性部を設ける位置と形状を変形させた態様を示す。ケース１（又は９１）の内側から外側にかけて先端の狭まる斜面を脚１４１の側面と開閉スイッチ１４０の摺動する面に一周して形成する。一方、脚１４１の側面の斜面に平行する斜面体状の第１柔軟弾性部を１４２をケース１（又は９１）の開口部ａの端面に設ける。また、開閉スイッチ１４０の摺動する面に平行する斜面体状の第２柔軟弾性部１４３を脚の摺動する面に設ける。
【００９６】
図２７は、第３柔軟弾性部を設ける位置と形状を変形させた態様を示す。ケース９１の内側から外側にかけて先端の狭まる斜面をつまみ１４４の可動軸の側面に一周して形成する。また、このつまみ１４４の可動軸の側面の斜面に平行する斜面体状の第３柔軟弾性部１４５をケース９１の開口部ｅの端面に設ける。
【００９７】
図２８は、図２４及び図２６を複合させた第１及び第２柔軟弾性部の態様を示す。ケース１（又は９１）の内側から外側にかけて先端の狭まる斜面を有する錐状体状の第１柔軟弾性部１４８を脚１４７の側面に一周して設ける。また、ケース１（又は９１）の内側から外側にかけて先端の狭まる斜面を有する錐状体状の第２柔軟弾性部１４９を開閉スイッチ１４６の脚１４７と摺動する面に一周して設ける。一方、脚１４７の側面の斜面に平行する斜面体状の第１柔軟弾性部を１５０をケース１（又は９１）の開口部ａの端面に設ける。また、開閉スイッチ１４６の摺動する面に平行する斜面体状の第２柔軟弾性部１５１を脚の摺動する面に設ける。
【００９８】
図２９は、図２５及び図２７を複合させた第３柔軟弾性部の態様を示す。ケース９１の内側から外側にかけて先端の狭まる斜面を有する錐状体状の第３柔軟弾性部１５３をつまみ１５２の可動軸の側面に一周して設ける。また、このつまみ１５２の可動軸の側面の斜面に平行する斜面体状の第３柔軟弾性部１５４をケース９１の開口部ｅの端面に設ける。
【００９９】
上述した図２４乃至図２９によると、それぞれの密封部分に密封時に付着した水滴が、各部分が開封された際に、斜面を伝わってケース１（又は９１）の外側に流れる。したがって、ケース１（又は９１）の内側への水滴の浸入を防ぐことができる。
【０１００】
図３０は、第１及び第２柔軟弾性部の形状をより有効に変形させた態様を示す。第１柔軟弾性部１５５と第２柔軟弾性部１５６が、脚１５７の可動方向に先端が狭まる形状を成す。そして、これら各々は、ケース１（又は９１）の開口部ａの周端部の上面とこれに対向する第２ベース１５９との間あるいは脚１５７の上面とこれに対向する開閉スイッチ１５８との間に設ける。
【０１０１】
図３１は、第３柔軟弾性部の形状をより有効に変形させた態様を示す。第３柔軟弾性部１６０は、脚の可動方向に先端が狭まる形状を成し、ケース９１の開口部ｅの周端部の上面とこれに対向するつまみ１６１のリング状片１６１ｂとの間に設ける。
【０１０２】
上述した図３０及び図３１によると、脚の可動方向に先端が狭まる形状の先端部分が各上面と接触して押された際に大きな変形を伴いながら密封する。したがって、確実に水や埃の浸入を防ぐことができる。
【０１０３】
【発明の効果】
以上説明したように、本発明の防水型秤は、計量の際には、開閉手段によってケースの開口部が開かれ、非計量の際には、開閉手段によってケースの開口部が密閉される。
【０１０４】
また、可動保持手段で脚を上方向に可動した位置の状態を保持する際に開密封部によってケースの開口部が開封され、可動保持手段によって脚を下方向に可動した位置の状態が保持される際に開密封部によってケースの開口部が密封される。
【０１０５】
また、本件防水型秤が設置面に置かれた際には、開閉スイッチが上方向に可動し、この上方向の動きが変換部により変換され、可動部が水平方向に可動し、ストッパーが解放される。そして、更に脚が上方向に可動し、第１柔軟弾性部と第２柔軟弾性部とが開封し、支柱を介しての荷重伝達が可能となる。一方、本件防水型秤が設置面から離れた際には、圧縮ばねによって脚及びストッパーが下方向に可動し、この下方向の動きが変換部により変換し、可動部が水平方向に可動し、ストッパーが上下方向に制限され、第１柔軟弾性部によってケースと脚との間隙が密封され、第２柔軟弾性部によって開閉スイッチと脚との間隙が密封される。
【０１０６】
また、本件防水型秤が設置面に置かれた際には、柔軟シート部が柔軟性を有したまま、開閉スイッチが上方向に可動し、この上方向の動きが変換部により変換され、可動部が水平方向に可動し、ストッパーが解放される。そして、更に脚が上方向に可動し、第１柔軟弾性部が開封し、支柱を介しての荷重伝達が可能となる。一方、本件防水型秤が設置面から離れた際には、圧縮ばねによって脚及びストッパーが下方向に可動し、この下方向の動きが変換部により変換し、可動部が水平方向に可動し、ストッパーが上下方向に制限され、第１柔軟弾性部によってケースと脚との間隙が密封されると共に、柔軟シート部によって開閉スイッチと脚との間隙が覆われている。
【０１０７】
また、つまみを作動することによって可動部が水平方向に可動し、可動ブロックが固定ブロックと接して下方向に押し下げられ、その位置の状態が保持部によって保持される。その際には、第１柔軟弾性部によってケースと脚との間隙が密封され、第３柔軟弾性部によってケースとつまみとの間隙が密封される。一方、つまみを作動することによって可動部が水平方向に可動し、固定ブロックと可動ブロックとが離れた状態にもなり、その位置の状態が保持部によって保持される。その際には、脚が上方向に可動し、第１柔軟弾性部と第３柔軟弾性部とが開封し、支柱を介しての荷重伝達が可能となる。
【０１０８】
したがって、これらは、精度低下を引き起こさずに計量を行うことができ、かつ、水や埃の浸入を防ぐことができる。よって、非計量時に丸洗いができ、防水型秤を清潔に保つことが可能となる。
【０１０９】
また、非計量の際にすべての脚の個数に対応した複数のストッパーによって、可動部すなわち脚の上方向への可動を押さえているので、外側から脚が押された際の脚とケースとの間隙の発生を強固に防ぐことができる。よって、内部への水の浸入による故障率の低下につながる。
【０１１０】
また、ある１ヶ所の開閉スイッチが押された際、この開閉スイッチと係わる脚は、この開閉スイッチと係わらないストッパーによって上方向への可動が押さえられているので、脚とケースとの間隙の発生を防ぐことができる。
【０１１１】
また、脚の側面又は摺動する面にはケースの内側から外側にかけて先端の狭まる斜面を有するので、ケースと脚との間隙が開封された際に、そこに付着していた水滴は、この斜面を伝わってケースの外側に流れる。
【０１１２】
また、開閉スイッチの摺動する面にはケースの内側から外側にかけて先端の狭まる斜面を有するので、開閉スイッチと脚との間隙が開封された際に、そこに付着していた水滴は、この斜面を伝わってケースの外側に流れる。
【０１１３】
また、つまみの軸の側面にはケースの内側から外側にかけて先端の狭まる斜面を有するので、ケースとつまみとの間隙が開封された際に、そこに付着していた水滴は、この斜面を伝わってケースの外側に流れる。
【０１１４】
したがって、これらは、それぞれにおける間隙が開封された際のケースの内側への水滴の浸入を高く防ぐことができる。よって、内部への水の浸入による故障率の低下につながる。
【０１１５】
また、脚の可動方向に先端が狭まる形状の先端部分が各上面と接触して押された際に大きな変形を伴いながら密封するので、確実に水や埃の浸入を防ぐことができる。よって、内部への水の浸入による故障率の低下につながる。
【図面の簡単な説明】
【図１】防水型秤の外観を表す斜視図である。
【図２】設置面に配置される前の状態を表す断面図である。
【図３】設置面に配置途中の状態を表す断面図である。
【図４】設置面に配置された状態を表す断面図である。
【図５】設置面に配置される前の状態から抜粋した内部機構を表す斜視図である。
【図６】設置面に配置途中の状態から抜粋した内部機構を表す斜視図である。
【図７】設置面に配置された状態から抜粋した内部機構を表す斜視図である。
【図８】設置面に配置される前の状態を表す断面図（変形例１）である。
【図９】設置面に配置途中の状態を表す断面図（変形例１）である。
【図１０】設置面に配置された状態を表す断面図（変形例１）である。
【図１１】設置面に配置される前の状態から抜粋した内部機構を表す斜視図（変形例１）である。
【図１２】設置面に配置途中の状態から抜粋した内部機構を表す斜視図（変形例１）である。
【図１３】設置面に配置された状態から抜粋した内部機構を表す斜視図（変形例１）である。
【図１４】設置面に配置される前の状態を表す断面図（変形例２）である。
【図１５】設置面に配置途中の状態を表す断面図（変形例２）である。
【図１６】設置面に配置された状態を表す断面図（変形例２）である。
【図１７】第２ベースと可動部との回転部を示す部分半断面図（変形例２）である。
【図１８】防水型秤の防水状態の際の状態を表す斜視図（第２の実施の形態）である。
【図１９】防水状態の際のケースの開口部を表すの部分断面図（第２の実施の形態）である。
【図２０】防水型秤のＡ部の詳細を表す部分拡大図（第２の実施の形態）である。
【図２１】防水型秤の非防水状態の際の状態を表す斜視図（第２の実施の形態）である。
【図２２】非防水状態の際のケースの開口部を表す部分断面図（第２の実施の形態）である。
【図２３】ケースの開口部を脚と開閉スイッチが係わり開密封する部分の別形態を表す部分断面図である。
【図２４】ケースの開口部を脚と開閉スイッチが係わり開密封する部分の別形態を表す部分断面図である。
【図２５】ケースの開口部をつまみが係わり開密封する部分の別形態を表す部分断面図である。
【図２６】ケースの開口部を脚と開閉スイッチが係わり開密封する部分の別形態を表す部分断面図である。
【図２７】ケースの開口部をつまみが係わり開密封する部分の別形態を表す部分断面図である。
【図２８】ケースの開口部を脚と開閉スイッチが係わり開密封する部分の別形態を表す部分断面図である。
【図２９】ケースの開口部をつまみが係わり開密封する部分の別形態を表す部分断面図である。
【図３０】ケースの開口部を脚と開閉スイッチが係わり開密封する部分の別形態を表す部分断面図である。
【図３１】ケースの開口部をつまみが係わり開密封する部分の別形態を表す部分断面図である。
【符号の説明】
１ケース
２電源スイッチ
３表示部
４、９４荷重検出部
５、９５第１ベース
６、７、３７、９６支柱
３７ａ直状凸部
８ストッパー
９、６９、９９第２ベース
６９ａ回転軸
１０、４０、７０、１００可動部
７０ａ円状板
７０ｂ回転軸受け
１１、４１、７１変換部
１１ａ、７１ａＬ型リンク片
１１ｂ、７１ｂＬ型リンク片用軸柱
７１ｃＩ型リンク片
７１ｄ波状片
７１ｅ波状片用軸柱
７１ｆ引張ばね
７１ｇばね用柱
４１ａ曲状凸部
１２、１３圧縮ばね
１４、１０４、１３４第１柔軟弾性部
１５、１３５、１４９、１５１第２柔軟弾性部
１６、１７、１１６、１３２、１３７、１４７脚
１８、４８、７８、１３１、１３６、１４６、１５０開閉スイッチ
１１０、１３９、１４４、１６１つまみ
１１０ａ、１３９ａ可動軸
１１０ｂ、１６１ｂリング状片
１１０ｃつかみ片
１１１固定ブロック
１１２可動ブロック
１１３保持部
１１３ａ凹部
１１３ｂ小ばね
１１３ｃボール
１１３ｄ円弧溝
１１４、１３８、１４５第３柔軟弾性部
１３３柔軟シート部
ａ、ｅ開口部
ｂ、ｃ、ｄ孔
Ｆ設置面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof balance that seals an opening that communicates between the inside and the outside of a case for non-weighing so as to be waterproof.
[0002]
[Prior art]
Conventionally, water, dust, etc. are prevented from entering the case from the opening of the case between the weighing pan provided outside the case of the waterproof scale and the load detection unit provided inside the case when not weighing. As means for carrying out the above, there have been proposed ones in which a bellows or a diaphragm is provided between a tray receiving member (measuring pan) and a casing (case) (Japanese Utility Model Laid-Open Nos. 1-1118328 and 4-94524, (See Kaihei 11-258032).
[0003]
[Problems to be solved by the invention]
However, a waterproof balance (particularly a low-weighing type) in which a bellows or a diaphragm is provided between the above-described dish receiving member (weighing dish) and casing (case), the object to be weighed on the weighing dish is used for weighing. There was a problem that the restoring force of the bellows and the diaphragm deformed when they are placed causes deterioration of accuracy such as weighing error.
[0004]
Therefore, the present invention aims to solve the above-mentioned conventional problems, and can measure without causing a decrease in accuracy when measuring, and can transmit a load when not measuring. It is an object of the present invention to provide a waterproof balance capable of sealing an opening that communicates the inside and outside of a case.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a waterproof balance according to the present invention is provided with a case having an opening communicating between the inside and the outside for load transmission, and a case on which a weighing object is loaded, and being connected to the inside of the case. A load detection unit that detects a load transmitted from a weighing object loaded on the case, and a load detection unit that is connected to the load detection unit and that extends from the inside of the case to the outside through the opening, and is loaded on the case. It is characterized by comprising leg for receiving a load transmitted from the weighing object, and opening / closing means for opening the case when measuring and sealing when not measuring.
[0006]
According to this, since the opening of the case is opened by the opening / closing means at the time of weighing, the weighing can be performed in a normal state without causing a decrease in accuracy. On the other hand, in the case of non-weighing, since the opening of the case is sealed by the opening / closing means, it is possible to prevent water and dust from entering.
[0007]
The opening / closing means moves the leg vertically with respect to the case and holds the position of the leg in the vertical direction. The movable holding means moves the leg upward. An opening / sealing portion that opens the opening of the case when holding the state of the movable position and seals the opening of the case when holding the state of the position where the leg is moved downward by the movable holding means. It is characterized by comprising.
[0008]
According to this, since the opening of the case is opened by the opening sealing portion when the movable holding means keeps the state of the position where the leg is moved upward, it can be normally measured and does not cause a decrease in accuracy. . On the other hand, since the opening of the case is sealed by the open sealing portion when the movable holding means holds the state where the leg is moved downward, the intrusion of water and dust can be prevented.
[0009]
The movable holding means is disposed on the inner side of the case, facing the lower side of the first base, the leg having a surface that slides in the vertical direction, the first base provided in the load detecting unit, and the first base. A second base provided on the leg; a support column having a surface standing and sliding on a lower surface of the first base; a surface provided in at least one place between the leg and the support column and sliding in the vertical direction An opening / closing switch having an opening, a movable part provided on the upper surface of the second base and movable in a horizontal direction with respect to the second base, and standing on the lower surface of the first base, A stopper that suppresses the movement of the movable part in the horizontal direction during weighing and connects the movable part and the open / close switch to each other and moves the movable part to a predetermined degree as the open / close switch moves. Conversion to convert And a compression spring having a predetermined elastic force that is provided along the column so as to push back the leg and the opening / closing switch, and the opening sealing portion is moved when the leg is moved upward in a predetermined direction. When the gap between the case and the leg is opened and the leg is moved downward in a predetermined direction, the gap between the case and the leg is sealed to be at least one of the case and the leg. When the opening / closing switch is moved upward in a predetermined direction, the gap between the opening / closing switch and the leg is opened and the opening / closing switch is moved downward in the predetermined direction. The movable switch includes a switch and a second flexible elastic portion that is provided on at least one side of the leg and is flexible and has a restoring force when sealing the gap between the switch and the leg. The features.
[0010]
According to this, when the waterproof scale is placed on the installation surface, the open / close switch moves upward, the conversion part converts this upward movement into horizontal movement, and the movable part It is moved by the movement of the direction, and the stopper is released. Further, the leg further moves upward, the first flexible elastic portion and the second flexible elastic portion are opened, and the load can be transmitted through the support column. Does not cause. On the other hand, when the waterproof scale is separated from the installation surface, the leg and the stopper are moved downward by the compression spring, and the conversion part converts the downward movement into the horizontal movement. It moves by horizontal movement, the stopper restricts the movable part in the vertical direction, the first flexible elastic part seals the gap between the case and the leg, and the second flexible elastic part seals the gap between the open / close switch and the leg As a result, water and dust can be prevented from entering.
[0011]
The movable holding means is disposed on the inner side of the case, facing the lower side of the first base, the leg having a surface that slides in the vertical direction, the first base provided in the load detecting unit, and the first base. A second base provided on the leg, a support column having a surface standing and sliding on a lower surface of the first base, and a surface provided in at least one position between the leg and the support column and sliding in the vertical direction An opening / closing switch having an opening, a movable part provided on the upper surface of the second base and movable in a horizontal direction with respect to the second base, and standing on the lower surface of the first base, A stopper that suppresses the movement of the movable part in the horizontal direction during weighing and connects the movable part and the open / close switch to each other and moves the movable part to a predetermined degree as the open / close switch moves. Conversion to convert And a compression spring provided on the support column and having a predetermined elastic force, and the opening / closing switch and the leg are provided so as to cover the gap between the opening / closing switch and the leg so that the opening / closing switch and the leg are slidable in the vertical direction. A flexible sheet part having flexibility, and the opening sealing part opens the gap between the case and the leg when the leg is moved upward in a predetermined direction, and the leg is moved in a predetermined direction downward. In this case, the first flexible elastic portion is provided on at least one side of the case and the leg, which is in a position to seal the gap between the case and the leg, and has a restoring force.
[0012]
According to this, when the waterproof scale is placed on the installation surface, the open / close switch moves upward while the flexible sheet portion remains flexible, and the conversion portion moves the upward movement horizontally. The movable part is moved by this horizontal movement, and the stopper is released. Further, the leg is further moved upward, the first flexible elastic portion is opened, and the load can be transmitted through the support column. Therefore, the measurement can be normally performed and the accuracy is not lowered. On the other hand, when the waterproof scale is separated from the installation surface, the leg and the stopper are moved downward by the compression spring, and the conversion part converts the downward movement into the horizontal movement. Since it is movable by horizontal movement, the stopper restricts the movable part in the vertical direction, the first flexible elastic part seals the gap between the case and the leg, and the flexible sheet part covers the gap between the open / close switch and the leg. Can prevent the ingress of water and dust.
[0013]
The movable holding means is disposed on the inner side of the case, facing the lower side of the first base, the leg having a surface that slides in the vertical direction, the first base provided in the load detecting unit, and the first base. A second base provided on the leg; a support column having a surface that stands and slides on a lower surface of the first base; and a movable that is provided on an upper surface of the second base and is movable in a horizontal direction with respect to the second base. , A knob provided on the movable part, forming a shaft from the inside of the case to the outside through the opening, a fixed block provided on the inner side of the case and having an opposing surface, and provided on the movable part. A movable block disposed at a position where the opposed surface and the opposed surface of the fixed block are brought into contact with each other and pushed downward when the movable portion has a predetermined movement, and the fixed block and the movable block, of It consists of a holding part that holds the state of the position where the facing surfaces are in contact with each other and the position where the movable block is pushed down and the state where the fixed block and the movable block are separated from each other. When the leg moves in a predetermined upward direction, the gap between the case and the leg is opened, and when the leg moves in a predetermined downward direction, the gap between the case and the leg is sealed. A first flexible elastic portion that is provided on at least one of the case and the leg and is flexible and has a restoring force, and a gap between the case and the knob is opened when the leg is moved upward in a predetermined direction. And a flexible and restoring force provided on at least one side of the case and the knob, which becomes a position for sealing the gap between the case and the knob when the leg is moved downward in a predetermined direction. Soft Characterized in that it consists of an elastic portion.
[0014]
According to this, by operating the knob, the movable part moves in the horizontal direction, the movable block comes into contact with the fixed block and is pushed downward, and the state of the position is held by the holding part. At that time, the gap between the case and the leg is sealed by the first flexible elastic portion, and the gap between the case and the knob is sealed by the third flexible elastic portion, so that intrusion of water and dust can be prevented. On the other hand, by operating the knob, the movable part is moved in the horizontal direction, and the fixed block and the movable block are separated from each other, and the state of the position is held by the holding part. At that time, the legs move upward, the first flexible elastic portion and the third flexible elastic portion are opened, and the load can be transmitted through the support column, so that the weighing can be performed normally. Does not cause a decrease in accuracy.
[0015]
The opening / closing switch, the movable part, the converting part, and the stopper are provided for each leg.
[0016]
According to this, since the movable part, that is, the upward movement of the leg is suppressed by a plurality of stoppers corresponding to the number of all legs when not weighing, the leg and case when the leg is pushed from the outside Can be firmly prevented from occurring.
[0017]
The stopper may be provided near the leg that is not related to the stopper.
[0018]
According to this, when a certain opening / closing switch is pressed, the leg associated with this opening / closing switch can be prevented from moving upward by a stopper not associated with this opening / closing switch. Occurrence can be prevented.
[0019]
In addition, the first flexible elastic portion is provided with a conical body having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the side surface of the leg. The case includes the first flexible elastic portion. An inclined surface parallel to the inclined surface of the cone is formed around the end face of the opening.
[0020]
In addition, the leg is formed by making a slope with a tip narrowing from the inside to the outside of the case around the side surface, and the first flexible elastic portion forms a slope body parallel to the slope of the side surface of the leg. It is characterized by being provided around the end face of the opening.
[0021]
In addition, the first flexible elastic portion is provided with a conical body having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the side surface of the leg, and is provided around the side surface of the leg. A sloped body parallel to the slope of the cone-shaped body formed is formed and provided around the end face of the opening of the case.
[0022]
According to these, since the side of the leg has a slope with the tip narrowing from the inside to the outside of the case, when the gap between the case and the leg is opened, the water droplets attached to the case are transmitted along this slope. Flows outside the case. Accordingly, it is possible to prevent water droplets from entering the inside of the case when the gap between the case and the leg is opened.
[0023]
In addition, the second flexible elastic portion is formed in a conical shape having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the surface that slides with the leg of the open / close switch. The leg that slides is formed so as to make a round on a sliding surface of a slope parallel to the slope of the cone-shaped body of the flexible elastic portion.
[0024]
Further, the open / close switch is formed with a slope whose tip is narrowed from the inside to the outside of the case around the surface sliding with the leg, and the second flexible elastic portion is a slope of the cone of the open / close switch. And is provided around the surface on which the leg slides.
[0025]
In addition, the second flexible elastic portion is formed in a conical shape having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the surface that slides with the leg of the open / close switch. A sloped body parallel to the slope of the cone of the switch is formed and provided around the sliding surface of the leg.
[0026]
According to these, the sliding surface of the open / close switch has a slope whose tip narrows from the inside to the outside of the case, so when the gap between the open / close switch and the leg is opened, the water droplets adhering thereto are It flows along the slope and flows to the outside of the case. Accordingly, it is possible to prevent water droplets from entering the inside of the case when the gap between the open / close switch and the leg is opened.
[0027]
In addition, the third flexible elastic portion is provided with a conical body having an inclined surface whose tip is narrowed from the inside to the outside of the case, and is provided around the side surface of the movable shaft of the knob. An inclined surface parallel to the inclined surface of the conical body is formed around the end surface of the opening.
[0028]
Further, the knob is formed with a slope whose tip is narrowed from the inside to the outside of the case around the side surface of the movable shaft, and the third flexible elastic portion is a slope parallel to the slope of the side surface of the movable shaft of the knob. A body is formed and provided around the end face of the opening of the case.
[0029]
In addition, the third flexible elastic portion forms a conical body having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the side surface of the movable shaft of the knob. A sloped body parallel to the slope of the cone-shaped body provided on the side surface is formed and provided around the end face of the opening of the case.
[0030]
According to these, the side of the movable shaft of the knob has a slope with a narrowed tip from the inside to the outside of the case, so when the gap between the case and the knob is opened, the water droplets attached to this slope It flows to the outside of the case. Accordingly, it is possible to prevent water droplets from entering the inside of the case when the gap between the open / close switch and the knob is opened.
[0031]
The first flexible elastic portion has a shape in which a tip is narrowed in a movable direction of the leg, and the upper surface of the peripheral end portion of the opening of the case and the second base facing the upper surface of the peripheral end portion. It is characterized by being provided between.
[0032]
The second flexible elastic portion has a shape in which a tip is narrowed in a movable direction of the leg, and is provided between the upper surface of the leg and the open / close switch facing the upper surface of the leg. .
[0033]
The third flexible elastic portion has a shape whose tip is narrowed in the movable direction of the leg, and the upper surface of the peripheral end portion of the opening of the case and the second base facing the upper surface of the peripheral end portion. It is characterized by being provided between.
[0034]
According to these, since the tip portion having a shape whose tip is narrowed in the movable direction of the leg is pressed while being brought into contact with each upper surface while being largely deformed, water and dust can be reliably prevented from entering.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0036]
First, a detailed description will be given of a first embodiment, which is an aspect in which a gap between a case and a leg is automatically sealed when leaving from an installation surface such as a floor or a table.
[0037]
FIG. 1 is a perspective view of the appearance of a waterproof balance according to the present invention, FIG. 2 is a cross-sectional view of the state before being placed on the installation surface, FIG. 4 is a cross-sectional view of the state arranged on the installation surface, FIG. 5 is a perspective view of the internal mechanism extracted from the state before being arranged on the installation surface, and FIG. The mechanism is shown in a perspective view, and the internal mechanism extracted from the state of being placed on the installation surface in FIG. 7 is shown in the perspective view.
[0038]
The waterproof scale according to the first embodiment of the present invention has a case 1 and four legs 16 and 17 on which four objects have openings a that communicate between the inside and the outside for load transmission. And form the outer shape of the balance. For this case 1, a molded product such as resin, die-casting, sheet metal or the like is used.
[0039]
A power switch 2 and a display unit 3 are provided on the surface of the case 1. In addition, in the case 1, there are a load detection unit 4, a first base 5, struts 6 and 7, a stopper 8, a second base 9, a movable unit 10, a conversion unit 11, compression springs 12 and 13, and a first flexible elasticity. Unit 14, a second flexible elastic unit 15, a measurement processing unit (not shown), and a power source (not shown). Furthermore, legs 16 and 17 and an opening / closing switch 18 are provided from the inside to the outside of the case 1.
[0040]
The power source is a power supply source to each part of the electric system. A dry battery, an AC adapter, a solar battery, or the like is used as the power source. The power switch 2 turns on and off the power.
[0041]
The load detection unit 4 is connected to the inside of the case 1 and detects a load transmitted from a weighing object loaded on the case 1. The load detector 4 uses a sensor of a robust mechanism such as a capacitance type or an electric resistance wire type.
[0042]
The measurement processing unit obtains and outputs a result such as a measurement value based on the load signal detected by the load detection unit 4. A known electronic board unit on which an amplifier circuit, an A / D conversion circuit, a storage device, a CPU, and the like are mounted is used for the measurement processing unit.
[0043]
The display unit 3 displays a result such as a measurement value output from the measurement processing unit. The display unit 3 is an LCD or LED.
[0044]
The first base 5 is connected to the load detection unit 4 and is formed of a flat plate having high rigidity. The support columns 6 and 7 have sliding surfaces, and the opening of the case 1 is provided at four positions on the lower surface of the first base 5 (three support columns 6 (two of which are not shown) and one support column 7). It stands up toward the part a. The second base 8 is disposed opposite to the lower side of the first base 5 and is made of a highly rigid flat plate.
[0045]
The legs 16 and 17 have a surface that slides in the vertical direction and is formed from the inside of the case 1 to the outside through the opening a, and the four positions of the second base 9 (three legs 16 (of which 2 are included) The location is not shown) and the leg 17 is provided at one location). Of these, the three legs 16 are in sliding contact with the surfaces sliding in the vertical direction of the three columns 6 on the surface sliding in the vertical direction.
[0046]
The opening / closing switch 18 is formed with surfaces that slide in the vertical direction on the inside and outside. The outer surface that slides in the vertical direction is in sliding contact with the surface that slides in the vertical direction of one leg 17. Further, the inner surface that slides in the vertical direction is in sliding contact with the surface that slides in the vertical direction of one column 7.
[0047]
The compression springs 12 and 13 have a predetermined elastic force. The compression springs 12 are provided along the three columns 6 between the first base 5 and the three legs 16. Further, the compression spring 13 is provided along one column 7 between the first base 5 and one leg 17. Here, the predetermined elastic force refers to the legs 16 and 17, the open / close switch 18, the second base 9, the movable unit 10, and the conversion unit 11 when the waterproof scale of the present case is placed on the installation surface F for measurement. The legs 16 and the open / close switch 18 and the support columns 6 and 7 slide by the total weight excluding the parts, and the legs 16 and 17 and the open / close switch 18 are moved until the opening a of the case 1 is opened. It is a spring constant that can move upward (or the case 1 is downward). In addition, when the waterproof scale of the present case is held away from the installation surface F for non-weighing, the leg 16, the open / close switch 18 and the support columns 6 and 7 slide in reverse, and the opening a of the case 1 is sealed. The spring constant is such that the legs 16 and 17 and the open / close switch 18 can move downward (or the case 1 upward) before reaching the state.
[0048]
The movable portion 10 is a longitudinal plate having a hole b in the vertical direction, and linearly slides on the upper surface of the second base 9 in the horizontal direction. The stopper 8 has a length that contacts the upper surface of the movable portion 10 when not measuring, and is a rod-shaped body that contacts the side surface of the hole b of the movable portion 10 when measuring, and stands on the lower surface of the first base 5. Set up.
[0049]
The conversion unit 11 includes an L-shaped link piece 11 a that couples the movable unit 10 and the opening / closing switch 18, and an L-shaped link that supports a corner portion of the L-shaped link piece 11 a so as to be rotatable and is erected on the second base 9. It consists of a single-use shaft column 11b, and the movable portion 10 moves in a predetermined manner as the opening / closing switch 18 moves. Here, the predetermined movable means that the case 1 is placed at the installation location and the surfaces of the legs 17 and the opening / closing switch 18 that are in contact with the installation surface F are on the same plane (FIGS. 3, 4, 6, and 7). When the position of the hole b of the movable portion 10 and the stopper 8 coincide with each other, and the case 1 is lifted from the installation location, the surfaces of the legs 17 and the opening / closing switch 18 are not on the same plane (FIGS. 2 and 5). Refers to the movement of the movable part 10 at a position that is out of the hole b. Further, the portion of the L-shaped link piece 11a that is connected to the movable portion 10 and the open / close switch 18 has an appropriate degree of freedom that allows the movable portion 10 and the open / close switch 18 to move smoothly.
[0050]
The first flexible elastic portion 14 is flexible and has a restoring force. When the legs 16 and 17 are moved upward in a predetermined direction, the gap between the case 1 and the legs 16 and 17 (opening a of the case 1) is opened, and the legs 16 and 17 are moved downward in a predetermined direction. Is provided at a position on the leg side that seals the gap between the case 1 and the legs 16 and 17 (the opening a of the case 1). Here, the predetermined movement refers to the movement caused by the action of a predetermined elastic force of the compression springs 12 and 13.
[0051]
The second flexible elastic portion 15 is flexible and has a restoring force. When the open / close switch 18 is moved upward in a predetermined direction, the gap between the open / close switch 18 and the leg 17 (opening a of the case 1) is opened, and when the open / close switch 18 is moved downward in a predetermined manner. Is provided at a position on the open / close switch side for sealing the gap between the open / close switch 18 and the leg 17 (opening a of the case 1). Here, the predetermined movement means movement that is caused by the action of a predetermined elastic force of the compression spring 13.
[0052]
Note that the first base 5, the columns 6 and 7, the stopper 8, the second base 9, the movable portion 10, the conversion portion 11, the compression springs 12 and 13, the legs 16 and 17, and the opening / closing switch 18 among the above-described cases 1 In contrast, a movable holding means is configured to move the legs 16 and 17 in the vertical direction and hold the position of the legs 16 and 17 in the vertical direction.
[0053]
Further, when the first flexible elastic portion 14 and the second flexible elastic portion 15 hold the state where the legs 16 and 17 are moved upward by the movable holding means, the opening a of the case 1 is opened, An open-sealing part that seals the opening a of the case 1 when the movable holding means holds the state where the legs 16 and 17 are moved downward is configured.
[0054]
The waterproof balance according to the first embodiment is configured as described above, and operates to be in a waterproof or non-waterproof state with the following use and handling.
[0055]
In the waterproof balance of the first embodiment, the movable holding means is automatically operated by holding the case 1 away from the installation surface F such as a floor or a table, and the case opening as shown in FIG. It will be in the waterproof state by which the part a was sealed.
[0056]
The automatic operation of the movable holding means for achieving the waterproof state will be described in detail. When the legs 16, 17 and the opening / closing switch 18 are separated from the installation surface F, the compression spring 12 between the first base 5 and the leg 16 causes the leg 16 and the compression spring between the first base 5 and the opening / closing switch 18. 13 pushes the open / close switch 18 downward with respect to the case 1. As a result, the legs 16, 17, the open / close switch 18, the second base 9, the conversion unit 11, the movable unit 10, and the first flexible elastic unit 14 are uniformly lowered downward with respect to the case. At that time, the first flexible elastic portion 14 provided on the leg side seals the gap between the case 1 and the legs 16 and 17. The second flexible elastic portion 15 provided on the open / close switch side seals the gap between the leg 17 and the open / close switch 18. That is, a waterproof state is achieved in which the opening a of the case indicating the gap between the case 1 and the legs 16 and 17 and the gap between the leg 17 and the opening / closing switch 18 is sealed.
[0057]
On the other hand, in the waterproof scale of the first embodiment, when weighing, the movable holding means is automatically operated by placing it on the installation surface F such as a floor or a table, as shown in FIG. 1 is opened in a non-waterproof state, and can be used by pressing the power switch 2 to turn on the power and placing the weighing object on the case 1 in the same manner as a known general scale.
[0058]
The automatic operation of the movable holding means for achieving the non-waterproof state will be described in detail. By placing on the installation surface F, first, as shown in FIG. 3 and FIG. 6, by the total weight of each part excluding the legs 16, 17, the opening / closing switch 18, the second base 9, the movable part 10, and the conversion part 11. The open / close switch 18 is movable upward with respect to the case 1. As the opening / closing switch 18 moves, the L-shaped link piece 11a rotates around the corner portion. As the L-shaped link piece 11a rotates, the movable portion 10 moves on the upper surface of the second base 9 in the horizontal direction. Then, when the bottom surface of the leg 17 in contact with the installation surface F and the bottom surface of the open / close switch 18 are on the same plane, the positions of the hole b of the movable portion 10 and the stopper 8 coincide.
[0059]
Subsequently, as shown in FIGS. 4 and 7, the bottom surface of the leg 17 in contact with the installation surface F and the bottom surface of the open / close switch 18 are on the same plane, and the legs 16, 17, the open / close switch 18, the second base 9 The legs 16, 17 are also directed upward with respect to the case 1 by the total weight of the parts excluding the movable part 10, the conversion part 11, the compression springs 12, 13, the first flexible elastic part 14, and the second flexible elastic part 15. It is movable. As the legs 16 and 17 move, the stopper 8 is inserted into the hole b of the movable portion 10. The bottom of the slidable contact surface of the leg 16 and the end of the slidable contact surface of the support column 6 and the bottom of the slidable contact surface of the open / close switch 18 and the end of the slidable contact surface of the support column 7 are brought into contact with each other. It stops moving. At that time, the first flexible elastic portion 14 provided on the leg side opens the gap between the case 1 and the legs 16 and 17. Further, the second flexible elastic portion 15 provided on the opening / closing switch side opens the gap between the leg 17 and the opening / closing switch 18. That is, the opening 1a of the case 1 indicating the gap between the case 1 and the legs 16 and 17 and the gap between the leg 17 and the opening / closing switch 18 is unsealed.
[0060]
And in this non-waterproof state, by placing a weighing object on the case 1, the load is transmitted to one end side of the load detection unit 4, and the leg from the installation surface F to the legs 16, 17 and the open / close switch 18. The reaction force against the load is transmitted from 16, 17 and the open / close switch 18 to the columns 6 and 7, from the columns 6 and 7 to the first base 5, and from the first base 5 to the other end side of the load detection unit 4, and thus known. Normal measurement is possible in the same way as
[0061]
Note that, as described above in connection with the automatic operation of the movable holding means for making the waterproof state, the case 1 is held away from the installation surface F such as a floor or a table so that each part is operated to the non-waterproof state. The operation is reversed to change from a non-waterproof state to a waterproof state.
[0062]
In the above description, the opening / closing switch 18, the movable part 10, the conversion part 11, and the stopper 8 are provided on one leg 17 of the four legs 16, 17, but are also provided on the other three legs 16. May be. In other words, it can be implemented at one or more locations. It is best to be provided on all the legs 16, 17. According to this, since the movable portion 10, that is, the upward movement of the legs 16, 17 is suppressed by the plurality of stoppers 8 corresponding to the number of all the legs 16, 17 during non-weighing, the legs 16 from the outside are suppressed. , 17 can be firmly prevented from generating gaps between the legs 16 and 17 and the case 1.
[0063]
Further, in the above description, the stopper 8 is positioned near the leg 16 that is different from the leg 17 connected in series with the movable part 10, the conversion part 11, and the opening / closing switch 18 in the middle, but near the leg 17 connected in series. It is also possible to implement it. However, when the stopper 8 is located near another leg 16, when one opening / closing switch 18 is pressed, the leg 17 connected in series with the opening / closing switch 18 is connected to the opening / closing switch 18. Since the upward movement is suppressed by the stopper that is not connected in series, the occurrence of a gap between the leg 17 and the case 1 can be prevented.
[0064]
As in the basic example described above, the gap between the case 1 and the legs 16 and 17 and the gap between the legs 17 and the open / close switch 18 are automatically sealed when they are separated from the installation surface F such as a floor or a table. The waterproof balance according to the first embodiment can be implemented in the same manner even in the following modifications.
[0065]
As a first modified example (modified example 1), FIG. 8 is a cross-sectional view of the state before being placed on the installation surface, FIG. 9 is a cross-sectional view of the state of being placed on the installation surface, and FIG. 11 is a sectional view, FIG. 11 is a perspective view of the internal mechanism extracted from the state before being placed on the installation surface, and FIG. 12 is a perspective view of the internal mechanism extracted from the state in the middle of placement on the installation surface. FIG. 13 is a perspective view showing the internal mechanism extracted from the state of being arranged on the installation surface. In the first modification, the same reference numerals are given to the same parts as the basic examples in the drawings, different reference numerals are given to the parts different from the basic examples, and only the parts different from the basic examples will be described in detail.
[0066]
The support column 37 forms a straight convex portion 37a having a straight line in the vertical direction on the sliding surface. The open / close switch 48 has a concave portion that is guided by the convex portion 37 a of the column 37 on the inside. The movable portion 40 is a fan-shaped plate having a hole c in the vertical direction, and slides horizontally on the upper surface of the second base 9 by rotating in the horizontal direction around the open / close switch 48. The conversion part 41 has a curved convex part 41 a having a gentle curve formed in the vertical direction on the outer sliding surface of the open / close switch 48, and a curved shape in sliding contact with the outer sliding surface of the open / close switch 48. The ring-shaped part 41b is formed at the center of rotation of the movable part 30 with a concave part guided by the convex part 41a on the inside.
[0067]
With this configuration, the open / close switch 48 is movable in the vertical direction on the sliding surface of the support column 37 along the straight convex portion 37a. Accordingly, the concave portion of the ring-shaped portion 41 b is guided to the convex portion 41 a formed on the opening / closing switch 48, and the movable portion 30 moves in the horizontal direction on the upper surface of the second base 9.
[0068]
At this time, if the bottom surface of the leg 17 in contact with the installation surface F and the bottom surface of the open / close switch 48 are not on the same plane, the stopper 8 contacts the top surface of the movable portion 40 (FIGS. 8 and 11). In addition, when only the opening / closing switch 48 is movable upward with respect to the case 1 and the bottom surface of the leg 17 in contact with the installation surface F and the bottom surface of the opening / closing switch 48 are on the same plane, The positions of c and the stopper 8 coincide (FIGS. 9 and 12). Further, the legs 16 and 17 are also moved upward with respect to the case 1, whereby the stopper 8 is inserted into the hole c of the movable portion 40 (FIGS. 10 and 13). Therefore, a waterproof / non-waterproof state can be obtained similarly.
[0069]
Further, as a second modification (Modification 2), FIG. 14 is a perspective view showing a state before being placed on the installation surface, FIG. 15 is a perspective view showing a state of being placed on the installation surface, and FIG. FIG. 17 is a partial half sectional view of the rotating part of the second base and the movable part. In addition, in this modification 2, the same code | symbol is attached | subjected about the same part as a basic example in a drawing, a different code | symbol is attached | subjected about a different part from a basic example, and only a different part from a basic example is explained in full detail.
[0070]
The second base 69 has a rotation shaft 69a at the center of the upper surface. The movable portion 70 includes a circular plate 70a having a hole d in the vertical direction, and a rotary bearing 70b provided in the center of the circular plate, the inner side being in sliding contact with the rotary shaft 69a and forming the outer side in a wave shape.
[0071]
The conversion unit 71 is for an L-shaped link piece 71a that connects the open / close switch 78 and one end, and a corner portion of the L-shaped link piece 71a that rotatably supports the second base 69. A shaft 71b, an I-type link piece 71c that rotatably connects one end to the other end of the L-shaped link piece 71a, and an end connected to the other end of the I-type link piece 71c. The corrugated piece 71d having a corrugated portion that meshes with the corrugated portion of the rotary bearing 70b, the corrugated piece shaft column 71e that stands on the second base 69 and rotatably supports the center of rotation of the corrugated piece 71d, and the corrugated piece 71d. The tension spring 71f that pulls the other end of the spring and the spring column 71g that stands on the second base 69 and fixes one end of the tension spring 71f.
[0072]
With this configuration, the L-shaped link piece 71a rotates around the corner portion as the open / close switch 78 moves in the vertical direction. The I-type link piece 71c moves in the horizontal direction as the L-type link piece 71a rotates. Further, with the rotation of the I-type link piece 71c, the wave-like piece 71d rotates about the center of rotation. Furthermore, as the wave piece 71d rotates, the rotary bearing 70b follows and the movable portion 70 rotates. When the opening / closing switch 78 is moved upward, the tension spring 71f is further extended, and when the opening / closing switch 78 is moved upward, the movable portion 70 is rotated and the corrugated piece 71d is pulled back.
[0073]
At this time, if the bottom surface of the leg 17 in contact with the installation surface F and the bottom surface of the open / close switch 78 are not on the same plane, the stopper 8 contacts the top surface of the movable portion 70. In addition, when only the opening / closing switch 78 is movable upward with respect to the case 1 and the bottom surface of the leg 17 in contact with the installation surface F and the bottom surface of the opening / closing switch 78 are on the same plane, The positions of d and the stopper 8 coincide (FIG. 15). Further, the legs 16 and 17 are also moved upward with respect to the case 1, whereby the stopper 8 is inserted into the hole d of the movable portion 70 (FIG. 16). Therefore, a waterproof / non-waterproof state can be obtained similarly.
[0074]
Next, a detailed description will be given of a second embodiment in which the gap between the case and the leg is manually sealed.
[0075]
18 is a perspective view of a waterproof balance according to the present invention in a waterproof state, FIG. 19 is a partially sectional view of an opening of a case in the waterproof state, and FIG. 20 is a partially enlarged view of details of a holding portion. FIG. 21 is a perspective view of the waterproof balance according to the present invention in a non-waterproof state, and FIG. 22 is a partial sectional view of the opening of the case in the non-waterproof state.
[0076]
The waterproof scale according to the second embodiment of the present invention has a case 91 and four legs 116 and 1 each having a plurality of openings e that communicate between the inside and the outside for transmitting a load at five places. The outer shape of the balance is formed with the two knobs 110. For the case 91, a molded product such as resin, die-casting, or sheet metal is used.
[0077]
On the surface of the case 91, as in the first embodiment, a power switch (not shown) and a display unit (not shown) are provided. Further, inside the case 91, there are a load detection unit 94, a first base 95, a support 96, a second base 99, a movable unit 100, a knob 110, a fixed block 111, a movable block 112, a holding unit 113, and a first flexible elastic. Unit 104, third flexible elastic unit 114, measurement processing unit (not shown), and power source (not shown). Furthermore, a leg 116 is provided from the inside to the outside of the case 91.
[0078]
Since the power source, power switch, load detection unit 94, support column 96, measurement processing unit, display unit, first base 95, leg 116, and first flexible elastic unit 104 are the same as those in the first embodiment, description thereof is omitted. To do.
[0079]
The fixed block 111 has a facing surface and is fixed inside the case 91. The second base 99 is arranged to face the lower side of the first base 95, has a shaft hole in the center, and is made of a highly rigid flat plate. The movable part 100 is made of a circular plate.
[0080]
The knob 110 includes a movable shaft 110a formed from the center portion of the lower surface of the movable portion 100 through the shaft hole of the second base 99 to the outside of the case, and the shaft hole of the second base 99 from the center portion of the lower surface of the movable portion 100. The ring-shaped piece 110b formed in the portion that has passed through, and the gripping piece 110c formed at the tip of the movable shaft 110a.
[0081]
The movable block 112 has an opposing surface, and is fixed to the movable unit 100 so that when the movable unit 100 is moved, the opposing surface and the opposing surface of the fixed block 111 are in contact with each other and are pushed downward. Is done.
[0082]
The holding portion 113 has a concave portion 113a provided on the lower surface of the movable portion 100, a small spring 113b and a ball 113c provided in the groove of the concave portion, and opposed surfaces of the fixed block 111 and the movable block 112 in contact with each other. Two arcs provided on the upper surface of the second base 99 that are positioned opposite to the recess 113a when pressed downward and positioned opposite to the recess 113a when the fixed block 111 and the movable block 112 are separated from each other. It consists of a groove 113d.
[0083]
The third flexible elastic portion 114 is flexible and has a restoring force. The gap between the case 91 and the knob 110 is opened when the leg 116 is moved upward in a predetermined direction, and the gap between the case 91 and the knob 110 is sealed when the leg 116 is moved in a predetermined downward direction. It is provided at a position on the knob side.
[0084]
The first base 95, the support column 96, the second base 99, the movable unit 100, the fixed block 111, the movable block 112, the knob 110, the holding unit 113, and the legs 116 are vertically moved with respect to the case 91. A movable holding means is configured to move the leg 116 and hold the state of the position of the leg 116 in the vertical direction.
[0085]
In addition, when the first flexible elastic portion 104 and the third flexible elastic portion 114 hold the state where the leg 116 is moved upward by the movable holding means, the opening e of the case 91 is opened and moved and held. An opening sealing portion that seals the opening e of the case 91 when the state in which the leg 116 is moved downward by the means is maintained is configured.
[0086]
The waterproof balance of the second embodiment is configured as described above, and operates to be in a waterproof or non-waterproof state with the following use and handling.
[0087]
As shown in FIGS. 18 and 19, the operation to the waterproof state in which the opening e of the case 91 is sealed will be described in detail. By rotating the knob 110 clockwise with a certain force or more while holding the case 91, the small spring 113b is bent and the ball 113c is detached from the arc groove 113d provided on the upper surface of the second base 99 and the movable part 100 is moved. Rotates. Then, at the position where the opposing surface of the movable block 112 that moves along with the movable portion 110 is in contact with the opposing surface of the fixed block 111, the ball 113c is formed in the previous arc groove provided on the upper surface of the second base 99. It fits in a circular arc groove 113d different from 113d.
[0088]
Thereby, the leg 116, the second base 99, the knob 110, the first flexible elastic portion 104, and the third flexible elastic portion 114 are uniformly lowered with respect to the case 91. At this time, the first flexible elastic portion 104 provided on the leg side seals the gap between the case 91 and the leg 116. Further, the third flexible elastic portion 114 provided on the knob side seals the gap between the case 91 and the knob 110. Furthermore, the movable part 100 maintains its state without rotating by applying a horizontal force of a certain level or more by fitting the ball 113c with another arc groove 113d. That is, a waterproof state is achieved in which the opening e of the case indicating the gap between the case 91 and the leg 116 and the gap between the case 91 and the knob 110 is sealed.
[0089]
On the other hand, as shown in FIGS. 21 and 22, the operation to the non-waterproof state in which the opening e of the case 91 is opened will be described in detail. By rotating the knob 110 counterclockwise with a certain force or more while holding the case 91, the small spring 113b is bent and the ball 113c is detached from another arc groove 113d provided on the upper surface of the second base 99 and is movable. Part 100 rotates. Then, at the position where the opposing surface of the movable block 112 that moves along with the movable portion 100 is separated from the opposing surface of the fixed block 111, the ball arc 113 is provided on the upper surface of the second base 99. Fits 113d.
[0090]
Thereby, the leg 116, the second base 99, the knob 110, the first flexible elastic portion 104, and the third flexible elastic portion 114 are uniformly lowered with respect to the case 91. At that time, the first flexible elastic portion 104 provided on the leg side opens the gap between the case 91 and the leg. Further, the third flexible elastic portion 114 provided on the knob side opens the gap between the case 91 and the knob 110. Furthermore, the movable part 100 maintains its state without rotating by applying a horizontal force of a certain level or more by fitting the ball 113c with the arcuate groove 113d. That is, when placed on the installation surface F, the case 91 and the leg 116 and the gap e between the case 91 and the knob 110 indicating the gap portion between the case 91 and the knob 110 are unsealed. It can be measured in the same way as the scales.
[0091]
As described above, the waterproof balance of the present invention is as described in the first and second embodiments, but the openings a and e of the cases 1 and 91 are shown in FIGS. Even if it is a form as shown, it can be implemented.
[0092]
FIG. 23 shows a mode in which a second flexible elastic portion is used. The flexible sheet portion 133 always covers the gap between the open / close switch 131 and the leg 132 so that the open / close switch 131 and the leg 132 are slidable in the vertical direction. According to this, even if the open / close switch 131 is movable downward relative to the leg 132 (FIG. 23 (a)) or upward (FIG. 23 (b)), the open / close switch 131 and the leg 132 are always The gap is closed and water and dust can be prevented from entering from this portion.
[0093]
FIG. 24 shows a mode in which the shapes of the first and second flexible elastic portions are deformed. A cone-shaped first flexible elastic portion 134 having a slope whose tip is narrowed from the inside to the outside of the case 1 (or 91) is provided around the side surface of the leg 137. Further, a cone-shaped second flexible elastic portion 135 having a slope whose tip is narrowed from the inside to the outside of the case 1 (or 91) is provided around the surface that slides with the leg 137 of the open / close switch 136. On the other hand, slopes parallel to the slopes of these cones are formed on the end surface of the opening a of the case 1 (or 91) and the surface on which the legs 137 slide.
[0094]
FIG. 25 shows a mode in which the shape of the third flexible elastic portion is deformed. A cone-shaped third flexible elastic portion 138 having a slope whose tip is narrowed from the inside to the outside of the case 91 is provided around the side surface of the movable shaft of the knob 139. A slope parallel to the slope of the cone is formed on the end surface of the opening e of the case 91.
[0095]
FIG. 26 shows a mode in which the position and shape of the first and second flexible elastic portions are deformed. A slope whose tip is narrowed from the inside to the outside of the case 1 (or 91) is formed around the side surface of the leg 141 and the sliding surface of the open / close switch 140. On the other hand, a sloped first flexible elastic portion 142 parallel to the slope of the side surface of the leg 141 is provided on the end surface of the opening a of the case 1 (or 91). A sloped second flexible elastic portion 143 parallel to the sliding surface of the open / close switch 140 is provided on the surface on which the leg slides.
[0096]
FIG. 27 shows a mode in which the position and shape of the third flexible elastic portion are deformed. A slope whose tip is narrowed from the inside to the outside of the case 91 is formed around the side surface of the movable shaft of the knob 144. In addition, a sloped third flexible elastic portion 145 parallel to the slope of the side surface of the movable shaft of the knob 144 is provided on the end surface of the opening e of the case 91.
[0097]
FIG. 28 shows an aspect of the first and second flexible elastic portions in which FIGS. 24 and 26 are combined. A cone-shaped first flexible elastic portion 148 having a slope whose tip is narrowed from the inside to the outside of the case 1 (or 91) is provided around the side of the leg 147. Further, a cone-shaped second flexible elastic portion 149 having a slope whose tip is narrowed from the inside to the outside of the case 1 (or 91) is provided around the surface that slides with the leg 147 of the open / close switch 146. On the other hand, a sloped body-like first flexible elastic portion parallel to the slope of the side surface of the leg 147 is provided on the end surface of the opening a of the case 1 (or 91). A sloped second flexible elastic portion 151 parallel to the sliding surface of the open / close switch 146 is provided on the surface on which the leg slides.
[0098]
FIG. 29 shows an aspect of a third flexible elastic portion obtained by combining FIG. 25 and FIG. A cone-shaped third flexible elastic portion 153 having a slope whose tip is narrowed from the inside to the outside of the case 91 is provided around the side surface of the movable shaft of the knob 152. Further, a sloped third flexible elastic portion 154 parallel to the slope of the side surface of the movable shaft of the knob 152 is provided on the end surface of the opening e of the case 91.
[0099]
According to FIG. 24 to FIG. 29 described above, water droplets attached to the respective sealed portions at the time of sealing flow to the outside of the case 1 (or 91) along the slope when each portion is opened. Accordingly, it is possible to prevent water droplets from entering the inside of the case 1 (or 91).
[0100]
FIG. 30 shows a mode in which the shapes of the first and second flexible elastic portions are more effectively deformed. The first flexible elastic portion 155 and the second flexible elastic portion 156 form a shape whose tip is narrowed in the movable direction of the leg 157. And each of these is between the upper surface of the peripheral edge part of the opening part a of case 1 (or 91), and the 2nd base 159 facing this, or between the upper surface of the leg 157, and the opening / closing switch 158 facing this. Provided.
[0101]
FIG. 31 shows a mode in which the shape of the third flexible elastic portion is more effectively deformed. The third flexible elastic portion 160 has a shape whose tip is narrowed in the movable direction of the leg, and is provided between the upper surface of the peripheral end portion of the opening e of the case 91 and the ring-shaped piece 161b of the knob 161 opposed thereto. .
[0102]
According to FIG. 30 and FIG. 31 described above, when the tip portion having a shape whose tip is narrowed in the movable direction of the leg is pressed in contact with each upper surface, it is sealed with a large deformation. Therefore, water and dust can be reliably prevented from entering.
[0103]
【The invention's effect】
As described above, in the waterproof balance of the present invention, the opening of the case is opened by the opening / closing means when weighing, and the opening of the case is sealed by the opening / closing means when not weighing.
[0104]
In addition, when the movable holding means holds the state where the leg is moved upward, the opening of the case is opened by the opening sealing portion, and the state where the leg is moved downward is held by the movable holding means. When opening, the opening of the case is sealed by the open sealing portion.
[0105]
In addition, when the waterproof scale is placed on the installation surface, the open / close switch moves upward, the upward movement is converted by the conversion unit, the movable unit moves horizontally, and the stopper is released. Is done. Further, the leg is further moved upward, the first flexible elastic portion and the second flexible elastic portion are opened, and load transmission via the column is possible. On the other hand, when the waterproof scale is separated from the installation surface, the leg and the stopper are moved downward by the compression spring, the downward movement is converted by the conversion unit, and the movable unit is moved in the horizontal direction. The stopper is restricted in the vertical direction, the gap between the case and the leg is sealed by the first flexible elastic part, and the gap between the open / close switch and the leg is sealed by the second flexible elastic part.
[0106]
In addition, when the waterproof scale is placed on the installation surface, the open / close switch is moved upward while the flexible sheet portion remains flexible, and the upward movement is converted by the conversion unit to be movable. The part moves horizontally and the stopper is released. Then, the leg further moves upward, the first flexible elastic portion is opened, and the load can be transmitted through the support column. On the other hand, when the waterproof scale is separated from the installation surface, the leg and the stopper are moved downward by the compression spring, the downward movement is converted by the conversion unit, and the movable unit is moved in the horizontal direction. The stopper is restricted in the vertical direction, the gap between the case and the leg is sealed by the first flexible elastic part, and the gap between the open / close switch and the leg is covered by the flexible sheet part.
[0107]
Further, by operating the knob, the movable part moves in the horizontal direction, the movable block comes into contact with the fixed block and is pushed downward, and the state of the position is held by the holding part. At that time, the gap between the case and the leg is sealed by the first flexible elastic portion, and the gap between the case and the knob is sealed by the third flexible elastic portion. On the other hand, by operating the knob, the movable part is moved in the horizontal direction, and the fixed block and the movable block are separated from each other, and the state of the position is held by the holding part. At that time, the leg moves upward, the first flexible elastic portion and the third flexible elastic portion are opened, and the load can be transmitted through the support column.
[0108]
Therefore, they can be measured without causing a decrease in accuracy, and can prevent water and dust from entering. Therefore, it is possible to wash in a non-weighing state and to keep the waterproof balance clean.
[0109]
In addition, since the movable part, that is, the upward movement of the leg, is suppressed by a plurality of stoppers corresponding to the number of all legs when not weighing, the leg and case when the leg is pushed from the outside are suppressed. Generation | occurrence | production of a clearance gap can be prevented firmly. Therefore, it leads to a decrease in failure rate due to water intrusion into the interior.
[0110]
In addition, when a certain open / close switch is pressed, the leg associated with the open / close switch is pressed upward by a stopper not engaged with the open / close switch, so that a gap between the leg and the case is generated. Can be prevented.
[0111]
In addition, since the side of the leg or the sliding surface has a slope with the tip narrowing from the inside to the outside of the case, when the gap between the case and the leg is opened, water droplets adhering to the slope are It flows to the outside of the case.
[0112]
In addition, the sliding surface of the open / close switch has a slope whose tip narrows from the inside to the outside of the case, so that when the gap between the open / close switch and the leg is opened, water droplets adhering to the slope are It flows to the outside of the case.
[0113]
Also, since the side of the knob shaft has a slope that narrows the tip from the inside to the outside of the case, when the gap between the case and the knob is opened, the water droplets that have adhered to the slope travel along this slope. Flows outside the case.
[0114]
Therefore, these can prevent the infiltration of water droplets into the inside of the case when the gaps are opened. Therefore, it leads to a decrease in failure rate due to water intrusion into the interior.
[0115]
Further, since the tip portion of the shape whose tip is narrowed in the movable direction of the leg is pressed in contact with each upper surface while being largely deformed, it can be reliably prevented from entering water and dust. Therefore, it leads to a decrease in failure rate due to water intrusion into the interior.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the appearance of a waterproof balance.
FIG. 2 is a cross-sectional view illustrating a state before being placed on an installation surface.
FIG. 3 is a cross-sectional view illustrating a state in the middle of arrangement on the installation surface.
FIG. 4 is a cross-sectional view showing a state of being arranged on an installation surface.
FIG. 5 is a perspective view showing an internal mechanism extracted from a state before being placed on the installation surface.
FIG. 6 is a perspective view showing an internal mechanism extracted from a state in the middle of arrangement on the installation surface.
FIG. 7 is a perspective view showing an internal mechanism extracted from a state of being arranged on an installation surface.
FIG. 8 is a cross-sectional view (Modification 1) showing a state before being placed on the installation surface.
FIG. 9 is a cross-sectional view (Modification 1) showing a state in the middle of arrangement on the installation surface.
FIG. 10 is a cross-sectional view (Modification 1) showing a state of being arranged on an installation surface.
FIG. 11 is a perspective view (Modification 1) showing an internal mechanism extracted from a state before being placed on the installation surface.
FIG. 12 is a perspective view (Modification 1) showing an internal mechanism extracted from a state in the middle of arrangement on the installation surface.
FIG. 13 is a perspective view (Modification 1) showing an internal mechanism extracted from a state of being arranged on an installation surface.
FIG. 14 is a cross-sectional view (Modification 2) showing a state before being placed on the installation surface.
FIG. 15 is a cross-sectional view (Modification 2) showing a state in the middle of arrangement on the installation surface;
FIG. 16 is a cross-sectional view (Modification 2) showing a state of being arranged on an installation surface.
FIG. 17 is a partial half sectional view (Modification 2) showing a rotating part of a second base and a movable part.
FIG. 18 is a perspective view (second embodiment) showing a waterproof balance in a waterproof state.
FIG. 19 is a partial cross-sectional view (second embodiment) showing an opening of a case in a waterproof state.
FIG. 20 is a partially enlarged view (second embodiment) showing details of a part A of the waterproof balance.
FIG. 21 is a perspective view (second embodiment) showing a waterproof balance in a non-waterproof state.
FIG. 22 is a partial cross-sectional view (second embodiment) showing an opening of a case in a non-waterproof state.
FIG. 23 is a partial cross-sectional view showing another embodiment of a portion where the opening of the case is opened and sealed by the leg and the open / close switch.
FIG. 24 is a partial cross-sectional view showing another embodiment of a part that opens and seals the opening of the case with the leg and the open / close switch engaged.
FIG. 25 is a partial cross-sectional view showing another form of a portion where the opening portion of the case is engaged with a knob to be opened and sealed.
FIG. 26 is a partial cross-sectional view showing another embodiment of a portion that opens and seals the opening of the case with the legs and the open / close switch engaged.
FIG. 27 is a partial cross-sectional view showing another form of a portion where the opening portion of the case is engaged and opened and sealed.
FIG. 28 is a partial cross-sectional view showing another embodiment of a portion where the opening of the case is opened and sealed by the leg and the open / close switch.
FIG. 29 is a partial cross-sectional view showing another embodiment of a portion where the opening portion of the case is engaged and opened and sealed.
FIG. 30 is a partial cross-sectional view showing another form of a portion where a leg and an open / close switch are engaged to open and seal the opening of the case.
FIG. 31 is a partial cross-sectional view showing another form of a portion where the opening portion of the case is engaged and opened and sealed.
[Explanation of symbols]
1 case
2 Power switch
3 Display section
4, 94 Load detector
5,95 1st base
6, 7, 37, 96 Prop
37a Straight convex part
8 Stopper
9, 69, 99 Second base
69a Rotating shaft
10, 40, 70, 100 Movable parts
70a circular plate
70b Rotating bearing
11, 41, 71 Conversion unit
11a, 71a L-shaped link piece
11b, 71b L-shaped link piece shaft
71c Type I link piece
71d wavy piece
71e Axis for wavy piece
71f tension spring
71g Spring pillar
41a Curved convex part
12, 13 Compression spring
14, 104, 134 First flexible elastic portion
15, 135, 149, 151 Second flexible elastic portion
16, 17, 116, 132, 137, 147 legs
18, 48, 78, 131, 136, 146, 150 Open / close switch
110, 139, 144, 161 Knob
110a, 139a Movable shaft
110b, 161b Ring-shaped piece
110c Grab piece
111 fixed block
112 Movable block
113 Holding part
113a recess
113b Small spring
113c ball
113d Arc groove
114, 138, 145 Third flexible elastic portion
133 Flexible sheet part
a, e opening
b, c, d holes
F Installation surface

Claims

A case having an opening that communicates the inside and the outside for load transmission, and a load on which a weighing object is loaded, and a load that is provided continuously from the inside of the case and that is transmitted from the weighing object loaded on the case is detected. A load detection unit; a leg that is connected to the load detection unit, is formed from the inside of the case to the outside through the opening, and receives a load transmitted from a weighing object loaded on the case; and an opening of the case A waterproof balance comprising: an opening / closing means that opens the portion when weighing and seals when not weighing.

The opening / closing means moves the leg in the vertical direction with respect to the case and moves the leg upward by the movable holding means for holding the position of the leg in the vertical direction. An opening sealing portion for opening the opening of the case when holding the state of the position and sealing the opening of the case when holding the state of the position where the leg is moved downward by the movable holding means The waterproof balance according to claim 1, wherein the waterproof balance is formed.

The movable holding means includes the leg having a surface that slides in a vertical direction, a first base provided in the load detection unit, and is disposed below the first base and disposed on the inner side of the case. A second base provided; a support column having a surface that stands and slides on a lower surface of the first base; an open / close switch having a surface that is provided between the leg and the support column and that slides in a vertical direction; A movable part provided on the upper surface of the second base and movable in a horizontal direction with respect to the second base; and a movable part standing on the lower surface of the first base and capable of moving upward in the movable part when not measured. A stopper that holds the movable portion in the horizontal direction during press-down measurement is connected to the movable portion and the open / close switch, and the movable portion is converted so that the movable portion moves in a predetermined manner as the open / close switch moves. Conversion unit, leg and opening / closing A compression spring is provided along the column so as to push back the switch and has a predetermined elastic force.The open sealing portion is formed between the case and the leg when the leg is moved in a predetermined direction upward. A flexible and restoring force is provided on at least one of the case and the leg, which is a position that seals the gap between the case and the leg when the gap is opened and the leg is moved in a predetermined downward direction. When the opening / closing switch is moved in a predetermined direction upward, a gap between the opening / closing switch and the leg is opened and the opening / closing switch is moved in a downward direction. 3. The opening / closing switch serving as a position that seals a gap between the switch and the leg, and a second flexible elastic portion that is provided on at least one side of the leg and is flexible and has a restoring force. Record Of waterproof scales.

The movable holding means includes the leg having a surface that slides in a vertical direction, a first base provided in the load detection unit, and is disposed below the first base and disposed on the inner side of the case. A second base provided; a support column having a surface that stands and slides on a lower surface of the first base; an open / close switch having a surface that is provided between the leg and the support column and that slides in a vertical direction; A movable part provided on the upper surface of the second base and movable in a horizontal direction with respect to the second base; and a movable part standing on the lower surface of the first base and capable of moving upward in the movable part when not measured. A stopper that holds the movable portion in the horizontal direction during press-down measurement is connected to the movable portion and the open / close switch, and the movable portion is converted so that the movable portion moves in a predetermined manner as the open / close switch moves. Conversion unit, leg and opening / closing A gap between the opening / closing switch and the leg is provided so that the compression spring provided along the column so as to push the switch back and having a predetermined elastic force, and the opening / closing switch and the leg can slide up and down. A flexible sheet portion provided so as to cover the flexible sheet portion, and the opening sealing portion opens the gap between the case and the leg when the leg is moved in a predetermined direction upward, and the leg is A first flexible elastic portion that is flexible and has a restoring force provided on at least one side of the case and the leg, which is a position that seals a gap between the case and the leg when moved in a predetermined direction. The waterproof balance according to claim 2.

The movable holding means includes the leg having a surface that slides in a vertical direction, a first base provided in the load detection unit, and is disposed below the first base and disposed on the inner side of the case. A second base provided; a column having a surface that stands and slides on a lower surface of the first base; and a movable portion that is provided on an upper surface of the second base and is movable in a horizontal direction with respect to the second base. A knob provided on the movable part to form an axis from the inside of the case to the outside through the opening, a fixed block provided on the inner side of the case and having an opposing surface, and an opposing surface provided on the movable part. A movable block disposed at a position where the opposed surface and the opposed surface of the fixed block are in contact with each other and pressed downward when the movable portion is moved in a predetermined manner, and the fixed block and the movable block are opposed to each other surface A holding part that holds a state where the movable block is in contact with the movable block and a position where the fixed block and the movable block are separated from each other. The case where the gap between the case and the leg is opened when the leg is moved upward and the gap between the case and the leg is sealed when the leg is moved downward. And a first flexible elastic portion that is provided on at least one side of the leg and is flexible and has a restoring force, and the gap between the case and the knob is opened when the leg is moved upward in a predetermined direction. A third flexible elastic that is flexible and has a restoring force provided on at least one side of the case and the knob, which becomes a position that seals a gap between the case and the knob when the leg is moved downward in a predetermined direction Waterproof scale according to claim 2, characterized in that it consists of a.

The waterproof balance according to claim 3 or 4, wherein the opening / closing switch, the movable portion, the converting portion, and the stopper are provided for each leg.

The waterproof balance according to claim 6, wherein the stopper is provided near the leg not associated with the stopper.

The first flexible elastic portion is provided with a conical body having an inclined surface whose tip is narrowed from the inside to the outside of the case, and is provided around the side surface of the leg. The case is provided with a cone of the first flexible elastic portion. The waterproof balance according to any one of claims 3 to 7, wherein a slope parallel to the slope of the cylindrical body is formed around the end face of the opening.

The leg is formed by rounding the side surface of the slope with the tip narrowing from the inside to the outside of the case, and the first flexible elastic portion forms a slope body parallel to the slope of the side surface of the leg, and the opening of the case The waterproof balance according to any one of claims 3 to 7, wherein the waterproof scale is provided around the end surface of the portion.

The first flexible elastic portion forms a cone-like body having a slope whose tip is narrowed from the inside to the outside of the case and is provided around the side surface of the leg, and the cone provided around the side surface of the leg. The waterproof balance according to any one of claims 3 to 7, wherein a slope body parallel to the slope of the cylindrical body is formed and provided around the end face of the opening of the case.

The second flexible elastic portion forms a conical body having an inclined surface whose tip is narrowed from the inside to the outside of the case, and is provided around the surface that slides with the leg of the open / close switch. 8. The waterproof balance according to claim 3, 6 or 7, wherein the moving leg is formed around a surface that slides on a slope parallel to the slope of the cone of the flexible elastic portion.

The open / close switch is formed by making a slope whose tip narrows from the inside to the outside of the case around the surface sliding with the leg, and the second flexible elastic portion is parallel to the slope of the cone of the open / close switch. The waterproof balance according to claim 3, 6 or 7, characterized in that a sloped body is formed and is provided around the sliding surface of the leg.

The second flexible elastic portion is formed in a conical shape having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the surface that slides with the leg of the open / close switch. The waterproof scale according to claim 3, 6 or 7, characterized in that a sloped body parallel to the slope of the cone-shaped body is formed and is provided around the sliding surface of the leg.

The third flexible elastic portion is formed with a conical body having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the side surface of the movable shaft of the knob. 6. The waterproof balance according to claim 5, wherein a slope parallel to the slope of the cone is formed around the end face of the opening.

The knob is formed by making a slope whose tip narrows from the inside to the outside of the case around the side surface of the movable shaft, and the third flexible elastic portion has a slope body parallel to the slope of the side surface of the movable shaft of the knob. 6. The waterproof scale according to claim 5, wherein the waterproof scale is formed and provided around the end face of the opening of the case.

The third flexible elastic portion is provided with a conical body having a slope whose tip is narrowed from the inside to the outside of the case, and is provided around the side surface of the movable shaft of the knob. 6. The waterproof scale according to claim 5, wherein a sloped body parallel to the slope of the provided cone-shaped body is formed and provided around the end face of the opening of the case.

The first flexible elastic portion has a shape whose tip is narrowed in the movable direction of the leg, and is between the upper surface of the peripheral end portion of the opening of the case and the second base facing the upper surface of the peripheral end portion. The waterproof balance according to any one of claims 3 to 7, wherein the waterproof balance is provided.

The second flexible elastic portion has a shape whose tip is narrowed in the movable direction of the leg, and is provided between the upper surface of the leg and the open / close switch facing the upper surface of the leg. The waterproof balance according to 3, 6 or 7.

The third flexible elastic portion has a shape whose tip is narrowed in the movable direction of the leg, and is between the upper surface of the peripheral end portion of the opening of the case and the second base facing the upper surface of the peripheral end portion. The waterproof balance according to claim 5, wherein the waterproof balance is provided on the waterproof scale.