JP5930657B2 - Weighing device - Google Patents
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- JP5930657B2 JP5930657B2 JP2011230594A JP2011230594A JP5930657B2 JP 5930657 B2 JP5930657 B2 JP 5930657B2 JP 2011230594 A JP2011230594 A JP 2011230594A JP 2011230594 A JP2011230594 A JP 2011230594A JP 5930657 B2 JP5930657 B2 JP 5930657B2
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- 238000005303 weighing Methods 0.000 title claims description 58
- 239000002184 metal Substances 0.000 claims description 23
- 238000003780 insertion Methods 0.000 claims description 20
- 230000037431 insertion Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 241001247986 Calotropis procera Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Description
本発明は、被計量物の質量を測定する計量装置の計量部の構造に関する。 The present invention relates to the structure of a weighing unit of a weighing device that measures the mass of an object to be weighed.
周知のように、被計量物の重さを測定するときは、被計量物を計量皿に載せたり降ろしたりしなければならないので、その載せ降ろし作業を軽減するために、下記特許文献１、２では、計量皿が載置される計量部をできるだけ薄くする技術が開示されている。 As is well known, when measuring the weight of an object to be weighed, the object to be weighed must be placed on or off the weighing pan. Then, a technique for making the weighing unit on which the weighing pan is placed as thin as possible is disclosed.
ところが、特許文献１に記載の計量部は、矩形の枠型固定フレームと、それと上下に嵌り合う同じく矩形の枠型可動フレームとの間に連結板を介して平衡ビーム型ロードセルを取り付ける構造であるため、計量部をさらに薄くすると、枠型フレームと、枠の間に渡される連結板とでは、計量皿に負荷される荷重を支えることができない。 However, the measuring unit described in Patent Document 1 has a structure in which a balanced beam type load cell is attached via a connecting plate between a rectangular frame-type fixed frame and a similarly rectangular frame-type movable frame that fits vertically. Therefore, if the weighing unit is made thinner, the frame-type frame and the connecting plate passed between the frames cannot support the load applied to the weighing pan.
そこで、矩形の枠型フレームに代えて、金属板に補強リブを縦横に張り巡らした剛板を使用すれば、可及的に薄くした計量部に剛性を持たせることはできる。しかし、そうすると、今度は、上下に嵌り合う剛板の間にロードセルを挟み込むことになるので、計量皿に偏荷重を掛けて偏置誤差を修正しようとしても、ロードセルの歪受感部を削るためのヤスリ等の工具が上下の剛板の間に挿入できず、結果的に四隅調整が行えないという新たな問題が生ずる。 Therefore, if a rigid plate in which reinforcing ribs are stretched vertically and horizontally is used instead of the rectangular frame frame, the weighing unit made as thin as possible can be made rigid. However, if this is done, the load cell will be sandwiched between rigid plates that fit vertically. Etc. cannot be inserted between the upper and lower rigid plates, resulting in a new problem that the four corners cannot be adjusted.
本発明は、こうした問題に鑑みて成したもので、計量装置の計量部を可及的に薄くしながら、四隅調整を簡単に行うことができる新たな計量装置を提供することを課題とする。 The present invention has been made in view of such problems, and an object of the present invention is to provide a new weighing device that can easily adjust the four corners while making the weighing unit of the weighing device as thin as possible.
上記課題を解決するために、請求項１に係る計量装置は、上面に計量皿が載置される盤状の皿受け部材の裏面に、ロードセルの可動端部を取り付けてなる計量装置であって、前記皿受け部材の上面に前記ロードセルの歪受感部と連なる工具挿入窓を設け、前記工具挿入窓は、金属製の板でもって着脱可能に塞がれており、前記金属製の板は、前記計量皿の熱が前記金属製の板に伝わり、さらに熱容量の大きい前記皿受け部材に伝わるよう、皿受け部材と同じ材質の金属からなることを特徴とする。 In order to solve the above-described problem, a weighing device according to claim 1 is a weighing device in which a movable end of a load cell is attached to the back surface of a plate-shaped plate receiving member on which a weighing plate is placed. In addition, a tool insertion window connected to the strain sensing part of the load cell is provided on the upper surface of the plate receiving member, and the tool insertion window is detachably closed with a metal plate, and the metal plate is The weighing pan is made of the same material as the pan receiving member so that the heat of the weighing pan is transferred to the metal plate and further to the pan receiving member having a larger heat capacity .
また、請求項２に係る計量装置は、請求項１に記載の計量装置であって、前記工具挿入窓には、ロボットハンドによって把持される把持部が形成されていることを特徴とする。 According to a second aspect of the present invention, there is provided a weighing apparatus according to the first aspect, wherein the tool insertion window is formed with a gripping portion that is gripped by a robot hand.
また、請求項３に係る計量装置は、請求項１又は２に記載の計量装置であって、前記工具挿入窓が、前記ロードセルの歪受感部の直上に設けられていることを特徴とする。 A weighing device according to a third aspect is the weighing device according to the first or second aspect, wherein the tool insertion window is provided directly above the strain sensing portion of the load cell. .
請求項１乃至３に係る発明によれば、盤状のベース部材と、同じく盤状の皿受け部材との間にロードセルを組み付けてなる計量部を可及的に薄くしても、皿受け部材の上面側からロードセルの歪受感部に対し、ヤスリ等の工具を挿入して計量部の四隅調整を行うことができる。したがって、ロードセルが組み込まれた計量部に対して偏置誤差を修正することができるので、個々の計量部を高精度なものに仕上げることができる。さらに、計量皿に熱いものや冷たいものが載せられると、その直下にあるロードセルが 熱的不平衡状態に陥って計量精度が落ちることがあるが、工具挿入窓が皿受け部材と同じ金属製の板で塞がれるので、計量皿に熱いものや冷たいものが載せられても、金属製の板を介してロードセルにおける熱的不平衡状態が解消され、計量精度が低下しない効果がある。 According to the inventions according to claims 1 to 3, even if the measuring portion formed by assembling the load cell between the plate-like base member and the plate-like plate receiving member is made as thin as possible, the plate receiving member It is possible to adjust the four corners of the measuring section by inserting a tool such as a file from the upper surface side of the load cell into the strain sensitive section of the load cell. Therefore, since the deviation error can be corrected with respect to the weighing unit incorporating the load cell, each weighing unit can be finished with high accuracy. In addition, if a hot or cold object is placed on the weighing pan, the load cell directly below it may fall into a thermal unbalanced state and the weighing accuracy may be reduced, but the tool insertion window is made of the same metal as the pan support member. Since the plate is closed, even if a hot or cold object is placed on the weighing pan, the thermal imbalance in the load cell is eliminated via the metal plate, and the weighing accuracy is not lowered.
また、請求項２に係る発明によれば、工具挿入窓がロボットハンドによって把持することができるので、皿受け部材をロードセルに組み付けるのに、ロボットハンドを使用することができる。したがって、計量部の組み立てラインにロボットを導入して自動化することができる。 According to the invention of claim 2, since the tool insertion window can be gripped by the robot hand, the robot hand can be used for assembling the dish receiving member to the load cell. Therefore, it is possible to automate by introducing a robot into the assembly line of the measuring unit.
また、請求項３に係る発明によれば、工具挿入窓がロードセルの歪受感部の直上に設けられているので、歪受感部に対する切削箇所や切削量を目で確認しながら四隅調整を行うことができる。また、歪受感部の直上が開放されていることから、歪受感部の表面に貼着された歪ゲージや回路配線等を調整したり、その上に防湿カバーを被せたりする作業も簡単にできる。
According to the invention of claim 3, since the tool insertion window is provided immediately above the strain sensitive portion of the load cell, the four corners can be adjusted while visually checking the cutting location and the cutting amount with respect to the strain sensitive portion. It can be carried out. In addition, since the part directly above the strain sensitive part is open, it is easy to adjust the strain gauge or circuit wiring attached to the surface of the strain sensitive part or to cover the moisture protective cover on it. Can be.
以下、本発明の一実施形態を図面に基づいて説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
図１は、本発明の一実施形態に係る計量装置Ａの外観斜視図を示す。この図では、計量部１００を本体２００とは別置きにしているが、計量部１００を本体２００の上面２０１に設置したり、そこに固定したりすることもできる。 FIG. 1 shows an external perspective view of a weighing device A according to an embodiment of the present invention. In this figure, the weighing unit 100 is provided separately from the main body 200, but the weighing unit 100 may be installed on the upper surface 201 of the main body 200 or fixed thereto.
計量装置Ａは、前面にタッチパネル３００が取り付けられ、背面に客側表示部３１０が組み込まれた本体２００と、被計量物が載荷される計量部１００とを備える。この計量部１００は、後述のロードセル４００と、ロードセル４００の出力を増幅してデジタル信号に変換する信号処理回路と、デジタル信号を本体２００側に送信する無線モジュールと、これらに給電するバッテリーとを備える。また、本体２００は、計量部１００から送信されたデジタル信号を受信する無線モジュールと、受信した信号を質量に変換するとともに、設定された単位質量当りの単価を掛けて価格を算出し、それをタッチパネル３００や客側表示部３１０に表示するコンピュータと、被計量物の重さや価格等をラベルやレシート紙に印字するプリンタと、これらに給電する電源装置とを備える。 The weighing device A includes a main body 200 having a touch panel 300 attached to the front surface and a customer-side display unit 310 incorporated on the back surface, and a weighing unit 100 on which an object to be weighed is loaded. The weighing unit 100 includes a load cell 400 described later, a signal processing circuit that amplifies the output of the load cell 400 and converts it into a digital signal, a wireless module that transmits the digital signal to the main body 200 side, and a battery that supplies power to these modules. Prepare. In addition, the main body 200 calculates a price by multiplying a unit price per unit mass, and a radio module that receives the digital signal transmitted from the weighing unit 100, converts the received signal into mass, A computer that displays on the touch panel 300 and the customer display unit 310, a printer that prints the weight, price, and the like of the object to be weighed on a label or receipt paper, and a power supply device that supplies power to these are provided.
前記計量部１００は、図２、図３に示すように、昇降自在の脚部１０１が設けられた金属製のベース部材１０２と、ベース部材１０２の上に非接触状態で被さる金属製の皿受け部材１０３とを備え、この両部材１０２、１０３がロードセル４００を介して上下に結合される。また、皿受け部材１０３の上面には、断熱性のあるクッション材１３０が貼り付けられ、その上から金属製の計量皿Ｂが被せられる。なお、図３は、図１に示す計量部１００のａ，ａ断面を矢印方向に見た断面図である。 As shown in FIGS. 2 and 3, the weighing unit 100 includes a metal base member 102 provided with a leg portion 101 that can be raised and lowered, and a metal tray receiver that covers the base member 102 in a non-contact state. The member 103 is provided, and both the members 102 and 103 are connected to each other up and down via the load cell 400. In addition, a heat insulating cushion material 130 is attached to the upper surface of the dish receiving member 103, and a metal weighing dish B is placed thereon. FIG. 3 is a cross-sectional view of the weighing unit 100 shown in FIG.
前記ベース部材１０２は、図２に示すように、矩形の盤状に形成され、その四隅には、雌ネジが施されたボス部１０４が形成され、そのボス部１０４の雌ネジにボルト埋め込み型の脚部１０１が捻じ込まれて、その捻じ込み量の調整により、ベース部材１０２の水平度が調整できるようになっている。 As shown in FIG. 2, the base member 102 is formed in a rectangular disk shape, and boss portions 104 with female screws are formed at four corners thereof, and a bolt embedded type is formed on the female screw of the boss portion 104. The level part of the base member 102 can be adjusted by adjusting the screwing amount.
また、図３に示すように、ベース部材１０２の上面には、ロードセル４００の周囲を囲む補強リブ１０５と、その補強リブ１０５を囲む外側補強リブ１０５ａとが設けられ、さらに、ベース部材１０２のロードセル取り付け面には、座金状のボス１０６が形成され、そのボス１０６を含むベース部材１０２に施された雌ネジにボルト１０７を捻じ込んでロードセル４００の固定端部４０２をベース部材１０２に固定している。 As shown in FIG. 3, a reinforcing rib 105 surrounding the periphery of the load cell 400 and an outer reinforcing rib 105 a surrounding the reinforcing rib 105 are provided on the upper surface of the base member 102, and the load cell of the base member 102 is further provided. A washer-like boss 106 is formed on the mounting surface, and a bolt 107 is screwed into a female screw applied to the base member 102 including the boss 106 to fix the fixed end 402 of the load cell 400 to the base member 102. Yes.
前記皿受け部材１０３は、図２に示すように、同じく矩形の盤状に形成され、その四隅は、前記ボス部１０４と干渉しないように円弧状にカットされ、そのカット面には、水平にブラケット１０８が設けられ、そのブラケット１０８に穿設されたネジ穴にストッパーとしての調整ボルト１０８ａが捻じ込まれ、その調整ボルト１０８ａの先端部とベース部材１０２との間隔調整により、皿受け部材１０３の過度な沈下が調整ボルト１０８ａによって制限されるようになっている。また、皿受け部材１０３の上面４ヶ所には、計量皿Ｂの裏面に設けられたピンを挿入するためのゴム製ブッシュ１０９が取り付けられている。 As shown in FIG. 2, the dish receiving member 103 is also formed in a rectangular disk shape, and its four corners are cut in an arc shape so as not to interfere with the boss portion 104, and the cut surface is horizontal. A bracket 108 is provided, and an adjustment bolt 108a as a stopper is screwed into a screw hole drilled in the bracket 108. By adjusting the distance between the tip of the adjustment bolt 108a and the base member 102, the plate receiving member 103 Excessive settlement is limited by the adjusting bolt 108a. Further, rubber bushes 109 for inserting pins provided on the back surface of the weighing pan B are attached to the upper surface of the tray receiving member 103 at four locations.
前記皿受け部材１０３の中央部には、図２に示すように、ロードセル４００の偏置誤差を修正するための工具挿入窓１１０が設けられ、その延長線上には、皿受け部材１０３の下面をロードセル４００の可動端部４０３にボルト１２２で固定するための凹部１１１と、図４の回路基板１１４に実装されたスパン調整ネジを操作するための貫通孔１１２を備えた凹部１１３と、回路基板１１４に実装された電子部品１１５との接触を避けるための開口窓１１６と、水準器１１７を覗き見るための覗き窓１１８とが設けられている。また、皿受け部材１０３の裏面には、図３に示すように、ベース部材１０２の補強リブ１０５、１０５ａと非接触状態で嵌り合う補強リブ１２０が縦横に張り巡らされている。 As shown in FIG. 2, a tool insertion window 110 for correcting an offset error of the load cell 400 is provided at the center of the plate receiving member 103, and the lower surface of the plate receiving member 103 is placed on the extended line. A recess 111 for fixing to the movable end 403 of the load cell 400 with a bolt 122, a recess 113 having a through hole 112 for operating a span adjustment screw mounted on the circuit board 114 of FIG. There are provided an opening window 116 for avoiding contact with the electronic component 115 mounted on and a viewing window 118 for looking into the level 117. Further, as shown in FIG. 3, reinforcing ribs 120 that fit in the non-contact state with the reinforcing ribs 105, 105 a of the base member 102 are stretched vertically and horizontally on the back surface of the dish receiving member 103.
前記工具挿入窓１１０は、そこからヤスリ等の工具を差し込んでロードセル４００の歪受感部４０１を適度な角度から切削できる形状とされている。また、工具挿入窓１１０には、図示しないロボットハンドのチャックが挿入できる切り欠け１１０ａが設けられ、その切り欠け１１０ａに左右のチャックを挿入して広げれば、皿受け部材１０３がロボットハンドに把持されるようになっている。なお、図２の皿受け部材１０３の段差部１０３ａに設けた窪み１０３ｂは、ロボットハンドが皿受け部材１０３を保持するときの位置決めとなる窪みである。 The tool insertion window 110 has a shape that allows a tool such as a file to be inserted therefrom and cut the strain sensing part 401 of the load cell 400 from an appropriate angle. Further, the tool insertion window 110 is provided with a notch 110a into which a chuck of a robot hand (not shown) can be inserted. If the left and right chucks are inserted into the notch 110a and spread, the dish receiving member 103 is gripped by the robot hand. It has become so. Note that the recess 103 b provided in the stepped portion 103 a of the dish receiving member 103 in FIG. 2 is a recess that is positioned when the robot hand holds the dish receiving member 103.
そして、皿受け部材１０３をロードセル４００に取り付けた状態で四隅調整が完了すれば、図４に示すように、金属板Ｃが工具挿入窓１１０に被せられ、その上から金属板Ｃのはみ出し部Ｃ１を下に敷きながら、封印カバー１１９が両凹部１１１、１１３の上に被せられ、その上から金属板Ｃのはみ出し部Ｃ１と共にネジ止めされるようになっている。また、前記はみ出し部Ｃ１には、図２の凹部１１３に設けられたボス１１３ａと勘合する貫通孔が設けられ、その貫通孔をボス１１３ａに挿入して金属板Ｃを位置決めし、その上から封印カバー１１９を被せてネジ止めするようになっている。 When the four corner adjustment is completed with the dish receiving member 103 attached to the load cell 400, as shown in FIG. 4, the metal plate C is put on the tool insertion window 110, and the protruding portion C1 of the metal plate C is formed thereon. The sealing cover 119 is placed on the concave portions 111 and 113 and is screwed together with the protruding portion C1 of the metal plate C from above. Further, the protruding portion C1 is provided with a through hole that engages with the boss 113a provided in the recess 113 in FIG. 2, and the metal plate C is positioned by inserting the through hole into the boss 113a and sealed from above. The cover 119 is covered and screwed.
前記封印カバー１１９は、スパン調整ネジを操作するための貫通孔１１２（図２参照）を封印するもので、国内仕様では、その上からシールを貼って封印するが、海外使用では、ワイヤーが連結されたネジを凹部１１３のネジ穴１１９ａに捻じ込んで封印し、ワイヤーの一端は、封印カバー１１９に設けたフランジ部１１９ｂに固定して止めるが、ここでは、その機能を利用して、前記はみ出し部Ｃ１を封印カバー１１９とともにボス１１３ａにネジ止めして、工具挿入窓１１０も同時に封印するようにしている。したがって、封印カバー１１９が封印されると、ワイヤーを切断しない限り、封印カバー１１９も金属板Ｃも取り外しができないようになっている。 The sealing cover 119 seals the through-hole 112 (see FIG. 2) for operating the span adjustment screw. In the domestic specification, a seal is applied from above, and the wire is connected for overseas use. The screw is screwed into the screw hole 119a of the recess 113 and sealed, and one end of the wire is fixed and fixed to the flange portion 119b provided on the sealing cover 119. The part C1 is screwed to the boss 113a together with the sealing cover 119 so that the tool insertion window 110 is sealed at the same time. Therefore, when the sealing cover 119 is sealed, the sealing cover 119 and the metal plate C cannot be removed unless the wire is cut.
前記金属板Ｃに代えて、断熱性のあるクッション材１３０を被せると、計量皿Ｂに熱いものや冷たいものが載せられたときに、ロードセル４００の上側の歪受感部４０１に温度勾配が生じ、これが原因で計量精度が低下することがある。これは、封印カバー１１９が金属であり、そこに金属製の計量皿Ｂが被せられるため、封印カバー１１９には、計量皿Ｂの熱が直接伝達される。すると、ロードセル４００の可動端部４０３と歪受感部４０１との間に温度勾配が生じ、それが原因で計量精度が低下すると考えられる。そこで、クッション材１３０に代えて、工具挿入窓１１０を金属板Ｃで被うと、計量皿Ｂの熱が金属板Ｃに伝わり、さらに熱容量の大きい皿受け部材１０３に伝わって、ロードセル４００の上側の歪受感部４０１には、温度勾配が生じ難くなると思われる。 If a heat-insulating cushion material 130 is placed in place of the metal plate C, a temperature gradient is generated in the strain sensing part 401 on the upper side of the load cell 400 when a hot or cold object is placed on the weighing pan B. This may cause the weighing accuracy to decrease. This is because the sealing cover 119 is made of metal and the weighing pan B made of metal is placed on the sealing cover 119, so that the heat of the weighing pan B is directly transmitted to the sealing cover 119. Then, a temperature gradient is generated between the movable end portion 403 of the load cell 400 and the strain sensing portion 401, and it is considered that the measurement accuracy decreases due to the temperature gradient. Therefore, when the tool insertion window 110 is covered with the metal plate C instead of the cushion material 130, the heat of the weighing pan B is transmitted to the metal plate C, and further to the plate receiving member 103 having a larger heat capacity, so that the upper side of the load cell 400 is A temperature gradient is unlikely to occur in the strain sensing unit 401.
図２の回路基板１１４は、ベース部材１０２に取り付けられているが、その基板には、ロードセル４００の出力を増幅してデジタル信号に変換する信号処理回路が実装され、そこで変換されたデジタル信号は、ベース部材１０２の裏面に取り付けられた図示しない無線モジュールを介して本体２００側の無線モジュールに送信される。 ただし、この無線モジュールに代えて、計量部１００と本体２００とを電送ケーブルで接続して、計量部１００の出力信号を本体２００側へ送信するようにしてもよい。その場合には、計量部１００のバッテリーは、不要となる。 The circuit board 114 in FIG. 2 is attached to the base member 102, and a signal processing circuit that amplifies the output of the load cell 400 and converts it into a digital signal is mounted on the board. The data is transmitted to the wireless module on the main body 200 side via a wireless module (not shown) attached to the back surface of the base member 102. However, instead of this wireless module, the weighing unit 100 and the main body 200 may be connected by a power transmission cable, and the output signal of the weighing unit 100 may be transmitted to the main body 200 side. In that case, the battery of the weighing unit 100 becomes unnecessary.
なお、ベース部材１０２の水平度を見るための水準器１１７は、ベース部材１０２に取り付けられ、皿受け部材１０３には、その水準器１１７を覗き見るための覗き窓１１８が設けられているが、計量皿Ｂには、その覗き窓１１８に対応する窓が設けられていない。 これは、計量皿Ｂが皿受け部材１０３から簡単に取り外せ、それによって計量部１００の水平度をいつでも確認できるからである。 The level 117 for viewing the level of the base member 102 is attached to the base member 102, and the pan receiving member 103 is provided with a viewing window 118 for looking into the level 117. The weighing pan B is not provided with a window corresponding to the viewing window 118. This is because the weighing pan B can be easily removed from the pan receiving member 103, and thereby the level of the weighing unit 100 can be confirmed at any time.
前記ロードセル４００は、図３に示すように、中央部がめがね状に刳り貫かれた平衡ビーム型のロードセルとして成形されているが、この実施形態では、特に、計量部１００の厚みを可及的に薄くするために、ロードセル４００の横幅を広げて扁平にしている。そして、薄肉に形成された上下の歪受感部４０１には、歪ゲージが貼着され、それらは、図示しないフレキシブルプリント基板を介してホイートストンブリッジに結線される。そして、これらの上には、防湿カバー４０４が被せられる。 As shown in FIG. 3, the load cell 400 is formed as a balanced beam type load cell in which the central portion is wound in the shape of glasses, but in this embodiment, the thickness of the measuring unit 100 is made as much as possible. In order to make the load cell 400 thinner, the width of the load cell 400 is increased and flattened. Then, strain gauges are attached to the upper and lower strain sensing parts 401 formed thin, and they are connected to a Wheatstone bridge via a flexible printed circuit board (not shown). And a moisture-proof cover 404 is put on these.
また、皿受け部材１０３の凹部１１１裏面には、座金状のボス１２３が形成され、ボルト１２２でロードセル４００の可動端部４０３を締め付けたときに、その可動端部４０３全面が凹部１１１裏面に密着するのを防止している。同様に、固定端部４０２側のベース部材１０２にもボス１０６が形成されているが、これは、ボルト１０７、１２２でロードセル４００を締め付けたときの歪ゲージへの影響を低減するためである。 Further, a washer-like boss 123 is formed on the back surface of the recess 111 of the dish receiving member 103, and when the movable end 403 of the load cell 400 is tightened with the bolt 122, the entire surface of the movable end 403 is in close contact with the back surface of the recess 111. Is prevented. Similarly, the boss 106 is formed on the base member 102 on the fixed end 402 side in order to reduce the influence on the strain gauge when the load cell 400 is tightened with the bolts 107 and 122.
なお、前記ロードセル４００の可動端部４０３は、歪受感部４０１よりも一段低くされて、ボルト１２２の頭が計量部１００内に収まるようにしている。また、可動端部４０３に近接するベース部材１０２には、上下に貫通するネジ穴が設けられ、そこに底面からストッパー用のボルト１２４が捻じ込まれて、その捻じ込み量の調整により、前記可動端部４０３が過度に沈下するのを防止している。 The movable end 403 of the load cell 400 is made one step lower than the strain sensing unit 401 so that the head of the bolt 122 can be accommodated in the measuring unit 100. Further, the base member 102 close to the movable end 403 is provided with a screw hole penetrating vertically, and a stopper bolt 124 is screwed into the screw hole from the bottom surface, and the movable member is adjusted by adjusting the screwing amount. The end portion 403 is prevented from sinking excessively.
１００ 計量部
１０２ ベース部材
１０３ 皿受け部材
１０５ 補強リブ
１０５ａ 補強リブ
１１０ 工具挿入窓
１１０ａ 切り欠け（把持部）
１２０ 補強リブ
４００ ロードセル
４０１ 歪受感部
４０２ 固定端部
４０３ 可動端部
Ａ 計量装置
Ｂ 計量皿
Ｃ 金属製の板
DESCRIPTION OF SYMBOLS 100 Weighing part 102 Base member 103 Plate receiving member 105 Reinforcement rib 105a Reinforcement rib 110 Tool insertion window 110a Notch (gripping part)
120 Reinforcement rib 400 Load cell 401 Strain sensing part 402 Fixed end part 403 Movable end part
A Weighing device
B Weighing pan
C metal plate
Claims (3)
A weighing device in which a movable end portion of a load cell is attached to the back surface of a plate-shaped plate receiving member on which a weighing plate is placed, and is connected to the strain sensing portion of the load cell on the upper surface of the plate receiving member. A tool insertion window is provided, the tool insertion window is detachably closed with a metal plate, and the metal plate transmits heat from the weighing pan to the metal plate, and further has a heat capacity. The weighing device is made of the same material as the plate receiving member so as to be transmitted to the plate receiving member having a large size .
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|---|---|---|---|
| JP2011230594A JP5930657B2 (en) | 2011-10-20 | 2011-10-20 | Weighing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011230594A JP5930657B2 (en) | 2011-10-20 | 2011-10-20 | Weighing device |
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| JP2013088340A JP2013088340A (en) | 2013-05-13 |
| JP5930657B2 true JP5930657B2 (en) | 2016-06-08 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0326430Y2 (en) * | 1985-02-19 | 1991-06-07 | ||
| JP3654545B2 (en) * | 1996-07-03 | 2005-06-02 | 株式会社タニタ | Weight scale |
| JP2001221681A (en) * | 2000-02-14 | 2001-08-17 | Kubota Corp | Metering device |
| JP4705345B2 (en) * | 2004-07-30 | 2011-06-22 | 株式会社エー・アンド・デイ | Weighing pan mounting structure |
| JP5369746B2 (en) * | 2009-02-16 | 2013-12-18 | 株式会社Ｉｈｉ | Conveyor system |
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