JP2003149038A - Load cell and electronic weighing machine - Google Patents
Load cell and electronic weighing machineInfo
- Publication number
- JP2003149038A JP2003149038A JP2001349691A JP2001349691A JP2003149038A JP 2003149038 A JP2003149038 A JP 2003149038A JP 2001349691 A JP2001349691 A JP 2001349691A JP 2001349691 A JP2001349691 A JP 2001349691A JP 2003149038 A JP2003149038 A JP 2003149038A
- Authority
- JP
- Japan
- Prior art keywords
- strain
- load cell
- leg
- mounting table
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measurement Of Force In General (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、載置台の裏側に
配置される平板型ロードセルおよび平板型ロードセルを
備えた体重計に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat plate type load cell arranged on the back side of a mounting table and a weight scale equipped with the flat plate type load cell.
【0002】[0002]
【従来の技術】図13に、載置台1の裏側の四隅にそれ
ぞれロードセル2を配置した従来の体重計(実開平4−
106731号)を示す。ロードセル2は、厚みのある
矩形ブロック状の金属材にめがね型の横孔3を設けて薄
肉の起歪部2aを形成し、この起歪部2aに歪みゲージ
8を貼り付けた構造である。そして、ロードセル2の加
重部は、硬球7を介して載置台1に連結され、ロードセ
ル2の固定部は、脚5を備えたベース4上に固定されて
いる。符号6a,6bは、載置台1とロードセル2間に
介装されて硬球7を支承できるように構成された硬球取
付部材である。2. Description of the Related Art FIG. 13 shows a conventional weight scale (actual flat panel 4-) having load cells 2 arranged at four corners on the back side of a mounting table 1.
No. 106731). The load cell 2 has a structure in which a spectacle-shaped lateral hole 3 is provided in a thick rectangular block-shaped metal material to form a thin strain element 2a, and a strain gauge 8 is attached to the strain element 2a. The weighted portion of the load cell 2 is connected to the mounting table 1 via the hard ball 7, and the fixed portion of the load cell 2 is fixed on the base 4 having the legs 5. Reference numerals 6a and 6b are hard ball mounting members that are interposed between the mounting table 1 and the load cell 2 and configured to support the hard balls 7.
【0003】[0003]
【発明が解決しようとする課題】前記した従来の体重計
では、ロードセル2として厚みのある矩形ブロック材が
使用され、またロードセル2と載置台1とは上下一対の
硬球取付部材6a,6bを介して連結され、さらには、
脚5を四隅に設けたベース4の上にロードセル2の固定
部が固定されるため、体重計を構成する部品点数が多
く、構造が複雑で、載置台1とベース4間にロードセル
2を配置する取り付け作業が面倒な上に、体重計の薄型
化と軽量化を図ることは困難であった。In the conventional scale described above, a thick rectangular block material is used as the load cell 2, and the load cell 2 and the mounting table 1 are provided with a pair of upper and lower hard ball mounting members 6a and 6b. Connected, and further,
Since the fixed part of the load cell 2 is fixed on the base 4 having the legs 5 at the four corners, the load cell 2 is arranged between the mounting table 1 and the base 4 because of the large number of parts constituting the weight scale and the complicated structure. In addition to the complicated mounting work, it was difficult to make the weight scale thin and lightweight.
【0004】また、従来知られている平板状ロードセル
を用いて薄型化を図るにしても、前記体重計では、硬球
取付部材6a,6bやベース4の存在により、構造を簡
潔にしてロードセルの取り付け性を改善したり薄型化や
軽量化するには限界があった。Further, even if a flat plate load cell known in the related art is used to reduce the thickness, the weight scale has a simple structure due to the presence of the hard-ball mounting members 6a and 6b and the base 4. There was a limit to improving the performance and reducing the thickness and weight.
【0005】本発明は、前記した従来技術の問題点を解
決するためになされたもので、その第1の目的は、載置
台への取り付け固定が容易で、体重計を薄型化できるロ
ードセルを提供すること、第2の目的は、脚の取り付け
固定が容易で、体重計を薄型化できるロードセルを提供
すること、第3の目的は、構造を簡潔にすることで、載
置台と脚間へのロードセルの取り付けが容易で、薄型か
つ軽量な体重計を提供することにある。The present invention has been made to solve the above-mentioned problems of the prior art. A first object of the present invention is to provide a load cell which can be easily attached and fixed to a mounting table and which allows a weight scale to be made thin. The second purpose is to provide a load cell in which the legs can be easily attached and fixed, and the weight scale can be made thin. The third purpose is to simplify the structure so that the weight between the mounting table and the legs can be reduced. An object of the present invention is to provide a thin and lightweight scale that allows easy attachment of a load cell.
【0006】[0006]
【課題を解決するための手段および作用】上記した第1
の目的を達成するために、請求項1に係るロードセルに
おいては、載置台の裏側に配置される平板型ロードセル
であって、外形の一部が載置台のコーナ部と同形に形成
されたコーナ配置部と、中央に設けられたスリットと、
前記スリットにより形成され、片持ち支持された舌片と
なる起歪部と、前記起歪部の付け根側に配置された歪み
ゲージとを備え、前記スリットの外側を前記載置台への
取付部とするように構成した。(作用)ロードセルのコ
ーナ配置部と載置台のコーナ部が同じ形状であるため、
ロードセルのコーナ配置部を載置台のコーナ部に配置す
れば、ロードセルを簡単に位置合わせでき、ロードセル
の載置台の裏側への配置作業が迅速かつ正確となる。[Means and Actions for Solving the Problems]
In order to achieve the above object, in the load cell according to claim 1, it is a flat plate type load cell arranged on the back side of the mounting table, and a corner arrangement in which a part of the outer shape is formed in the same shape as the corner portion of the mounting table. Part, a slit provided in the center,
Formed by the slit, comprising a strain-generating part which is a cantilever supported in a cantilever manner, and a strain gauge arranged on the base side of the strain-generating part, and the outside of the slit is attached to the mounting table. Configured to do so. (Operation) Since the corner placement portion of the load cell and the corner portion of the mounting table have the same shape,
By arranging the corner arranging portion of the load cell at the corner portion of the mounting table, the load cell can be easily aligned, and the arranging work of the load cell on the back side of the mounting table becomes quick and accurate.
【0007】また、一枚の板で構成されたロードセルの
スリットの外側が載置台への取付部となるので、従来必
要とした専用の取付部材が不要で、それだけ体重計を構
成する部品点数が少なくなる。また、ロードセルを載置
台に固定することになるので、従来よりも取り付け作業
が簡単で、体重計を扁平にできる。Further, since the outside of the slit of the load cell composed of one plate serves as a mounting portion to the mounting table, a dedicated mounting member conventionally required is not necessary, and the number of parts constituting the scale is reduced accordingly. Less. Further, since the load cell is fixed to the mounting table, the mounting work is easier than before and the scale can be flattened.
【0008】また、前記した第2の目的を達成するため
に、請求項2に係るロードセルにおいては、載置台の裏
側に配置される平板型ロードセルであって、中央に設け
られたスリットと、前記スリットにより形成され、片持
ち支持で下側に取り付けられる脚の外形にほぼ倣った形
状の起歪部と、前記起歪部の付け根側に配置された歪み
ゲージとを備え、前記起歪部の先端側を前記脚の取付部
とするように構成した。
(作用)ロードセルの起歪部の先端側が脚の取付部とな
るので、従来必要であった専用の取付部材が不要で、そ
れだけ体重計を構成する部品点数が少なくなる。また、
起歪部に脚を取り付ければよいので、取り付け作業が簡
単で、体重計を扁平にできる。In order to achieve the above-mentioned second object, the load cell according to a second aspect is a flat plate type load cell arranged on the back side of the mounting table, wherein a slit provided at the center and the A strain gauge formed by a slit and having a shape that substantially follows the outer shape of the leg that is attached to the lower side by cantilever support, and a strain gauge that is arranged on the base side of the strain strain section are provided. The distal end side is configured to be the attachment portion of the leg. (Operation) Since the distal end side of the strain-flexing portion of the load cell serves as the leg mounting portion, a dedicated mounting member that has been conventionally required is not necessary, and the number of parts constituting the weight scale is reduced accordingly. Also,
Since the legs can be attached to the strain-flexing part, the attaching work is easy and the scale can be made flat.
【0009】また、前記した第3の目的を達成するため
に、請求項3に係る電子体重計においては、矩形状の載
置台と、前記載置台の裏側の四隅に配置され、平板状の
起歪部をもつロードセルと、前記ロードセルの荷重信号
を集計する演算手段と、前記演算手段の計量値をデジタ
ル表示する表示手段と、前記ロードセルの起歪部に取り
付けられた脚と、前記起歪部と脚との間に配置されて荷
重を伝達する硬球とを備え、前記脚の上面に硬球支承用
の凹部を設け、前記硬球が前記起歪部の下面に接触する
ように構成した。
(作用)硬球を取付けるために従来必要であった専用の
取付部材が不要で、それだけ体重計を構成する部品点数
が少なくなる。また、脚が硬球を取付けるための取付部
材を兼ねるので、硬球支承用の凹部に硬球を収容した脚
を起歪部に取り付ければよく、取り付け作業が簡単で、
体重計を扁平にできる。In order to achieve the above-mentioned third object, in an electronic scale according to a third aspect of the present invention, a rectangular mounting table and four flat corners arranged on the back four corners of the mounting table are provided. A load cell having a strained portion, a calculation means for totalizing load signals of the load cell, a display means for digitally displaying a weight value of the calculation means, a leg attached to the strained portion of the load cell, and the strain generating portion. And a hard ball for transmitting a load disposed between the leg and the leg, a recess for supporting the hard ball is provided on the upper surface of the leg, and the hard ball is configured to contact the lower surface of the strain-flexing portion. (Function) A dedicated mounting member conventionally required for mounting a hard ball is not required, and the number of parts constituting the scale is reduced accordingly. Also, since the leg also serves as a mounting member for mounting the hard ball, it is sufficient to mount the leg accommodating the hard ball in the concave portion for supporting the hard ball on the strain-flexing portion, and the mounting work is easy.
The scale can be flattened.
【0010】請求項4においては、請求項3における脚
を、硬球を支承する凹部と起歪部締結用のねじ孔とを設
けた金属プレートを用い、これを樹脂またはゴムにイン
サートした成形体によって構成するようにした。
(作用)硬球を支承する凹部を設けた金属プレートは高
硬度の金属材で構成されており、硬球を支承する凹部は
摩滅しにくく、硬球の回転機能は長期にわたって損なわ
れない。また、脚の下表面を覆う樹脂層またはゴム層
は、床面を傷つけず、床面の多少の凹凸を吸収する。According to a fourth aspect of the present invention, the leg according to the third aspect uses a metal plate provided with a recess for supporting a hard ball and a screw hole for fastening a strain-flexing portion, and the leg is formed by a resin or rubber molded body. I configured it. (Operation) The metal plate provided with the concave portion for supporting the hard ball is made of a metal material having high hardness, the concave portion for supporting the hard ball is hard to wear, and the rotating function of the hard ball is not impaired for a long time. Further, the resin layer or the rubber layer covering the lower surface of the leg does not damage the floor surface and absorbs some unevenness of the floor surface.
【0011】[0011]
【発明の実施の形態】次に、この発明の好適な実施形態
を実施例に基づいて詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described in detail based on examples.
【0012】図1〜8は、本発明の第1の実施例である
体重計を示し、図1は同体重計の平面図、図2は同体重
計の底面斜視図、図3は同体重計の縦断面図(図1に示
す線III−IIIに沿う断面図)、図4は同体重計の縦断面
図(図1に示す線IV−IVに沿う断面図)、図5は同体
重計のロードセル取り付け部の分解斜視図、図6は脚の
平面図、図7は同脚の縦断面図(図6に示す線VII−V
IIに沿う断面図)、図8は脚にインサート成形される金
属製ディスクの斜視図である。1 to 8 show a weight scale according to a first embodiment of the present invention. FIG. 1 is a plan view of the weight scale, FIG. 2 is a bottom perspective view of the weight scale, and FIG. Vertical cross-sectional view of the scale (cross-sectional view taken along line III-III shown in FIG. 1), FIG. 4 is a vertical cross-sectional view of the same scale (cross-sectional view taken along line IV-IV shown in FIG. 1), and FIG. 6 is a plan view of the leg, and FIG. 7 is a longitudinal sectional view of the leg (a line VII-V shown in FIG. 6).
FIG. 8 is a perspective view of a metal disk insert-molded on the leg.
【0013】これらの図において、体重計10は、人が
乗ることができる大きさに形成された平面視正方形状の
載置台12と、載置台12の四隅下方にそれぞれ設けら
れた脚14と、載置台12の下面と各々の脚14間に介
装されたロードセル20と、ロードセル20の検出する
荷重信号を集計する演算手段である演算制御部(CP
U)30と、載置台12の表面側に露出し、演算制御部
(CPU)30の演算結果(計量値)をデジタル表示す
る表示手段である表示部40とから主として構成されて
いる。In these figures, a scale 10 includes a mounting base 12 having a square shape in plan view, which is formed so that a person can ride on it, and legs 14 provided below the four corners of the mounting base 12, respectively. The load cell 20 interposed between the lower surface of the mounting table 12 and each leg 14, and an operation control unit (CP) that is an operation unit that adds up load signals detected by the load cell 20.
U) 30 and a display unit 40 which is exposed on the surface side of the mounting table 12 and which is a display unit for digitally displaying the calculation result (measured value) of the calculation control unit (CPU) 30.
【0014】ロードセル20は、平板状の起歪体21の
起歪部24に歪みゲージ28を貼り付けて構成されてい
る。詳しくは、図5に示されるように、五角形状の金属
製プレート体のほぼ中央に略U字状に延びるスリット2
2を形成することで、片持ち梁状の起歪部24を備えた
起歪体21が構成され、起歪体21の起歪部24におけ
る幅狭の付け根部に歪みゲージ28を貼り付けること
で、ロードセル20となる。即ち、図4符号Pに示すよ
うに、載置台に荷重が作用すると、U字状スリット22
で囲まれた舌片状の起歪部24は、スリット22外側の
起歪体周縁領域23に対して上方向に揺動し、このとき
起歪部24に発生する歪みが歪みゲージ28を介して検
出される。The load cell 20 is constructed by attaching a strain gauge 28 to a strain-generating portion 24 of a flat-plate strain-generating body 21. More specifically, as shown in FIG. 5, a slit 2 extending in a substantially U-shape is formed substantially in the center of a pentagonal metal plate body.
By forming 2, the strain element 21 having the cantilever type strain element 24 is configured, and the strain gauge 28 is attached to the narrow base portion of the strain element 24 of the strain element 21. Then, it becomes the load cell 20. That is, as shown by symbol P in FIG. 4, when a load is applied to the mounting table, the U-shaped slit 22
The tongue-shaped strain-generating portion 24 surrounded by oscillates upward with respect to the strain-generating-member peripheral region 23 outside the slit 22, and the strain generated in the strain-generating portion 24 at this time passes through the strain gauge 28. Detected.
【0015】載置台12の四隅の裏側には、起歪部24
の上方揺動スペースを確保するためのスペーサ部材26
が溶接,接着その他の固着手段によって固定されてお
り、起歪体周縁領域23にはねじ孔23aが等間隔に設
けられ、載置台12に一体化された馬蹄形のスペーサ部
材26にも、ねじ孔23aに対応するねじ孔26aが設
けられている。そして、ねじ孔23a,26a同士を一
致させて、スペーサ部材26にロードセル20(起歪体
周縁領域23)がねじ締結されている。即ち、ロードセ
ル20のスリット22外側が締結ねじ26bによって載
置台12に固定されている。On the back side of the four corners of the mounting table 12, a strain-flexing part 24 is provided.
Member 26 for securing the upper swinging space of the
Are fixed by welding, bonding, or other fixing means, and screw holes 23a are provided at equal intervals in the flexure element peripheral region 23. The screw holes are also formed in the horseshoe-shaped spacer member 26 integrated with the mounting table 12. A screw hole 26a corresponding to 23a is provided. The load cell 20 (strain element peripheral region 23) is screwed to the spacer member 26 by aligning the screw holes 23a and 26a with each other. That is, the outside of the slit 22 of the load cell 20 is fixed to the mounting table 12 by the fastening screw 26b.
【0016】また、載置台12の直角コーナ部に対応す
るロードセル20(起歪体21)のコーナ配置部20a
は、頂角90度に形成されており、図2に示すように、
裏返した載置台12の直角コーナ部にロードセル20の
コーナ配置部20aを係合させると、ロードセル20の
ねじ孔23aとスペーサ部材26のねじ孔26bが一致
するので、ロードセル20を載置台12に簡単に取り付
けることができる。Further, the corner placement portion 20a of the load cell 20 (strain element 21) corresponding to the right-angled corner portion of the mounting table 12 is provided.
Is formed with a vertical angle of 90 degrees, and as shown in FIG.
When the corner placement portion 20a of the load cell 20 is engaged with the right angled corner portion of the mounting table 12 turned upside down, the screw hole 23a of the load cell 20 and the screw hole 26b of the spacer member 26 are aligned, so that the load cell 20 can be easily mounted on the mounting table 12. Can be attached to.
【0017】また、起歪部24の先端側24aは、脚1
4の外形(円形)とほぼ同一の円弧形状に形成されると
ともに、ここ(先端側24a)には、脚取付用のねじ2
7を挿通させるためのねじ挿通孔24b,24bが設け
られている。そして、ねじ27によって、脚14が起歪
部24の下面に硬球18を介して取り付け固定されて、
ロードセル20に作用する偏芯荷重はこの硬球18によ
って吸収されるようになっている。Further, the distal end side 24a of the strain-flexing portion 24 is connected to the leg 1
4 is formed in an arc shape almost the same as the outer shape (circular shape) of FIG.
Screw insertion holes 24b, 24b for inserting 7 are provided. Then, the legs 14 are attached and fixed to the lower surface of the strain-flexing portion 24 via the hard balls 18 by the screws 27,
The eccentric load acting on the load cell 20 is absorbed by the hard balls 18.
【0018】即ち、脚14の上面中央部には、硬球支承
部である凹穴(凹部)16aが設けられるとともに、凹
穴16aを挟んで一対のねじ孔16b,16bが設けら
れている。一方、起歪部24側のねじ挿通孔24bは、
起歪部24の延出方向と直交する方向(舌片状の起歪部
24の幅方向)に離間して設けられており、起歪部24
のねじ挿通孔24bに挿通したねじ27をこのねじ孔1
6bに螺合させることで、凹穴16aに収容された硬球
18が起歪部24の下面に当接する形態に保持されてい
る。図3,5における符号19は、ねじ挿通孔24bに
挿通され、ねじ27の頭部下面とねじ孔16b周縁部間
に介装された金属製カラーで、凹穴16a内の硬球18
に必要以上の負荷(圧接力)を作用させないようになっ
ている。That is, in the center of the upper surface of the leg 14, a concave hole (recess) 16a which is a hard ball bearing portion is provided, and a pair of screw holes 16b and 16b are provided so as to sandwich the concave hole 16a. On the other hand, the screw insertion hole 24b on the strain-flexing portion 24 side is
The strain-flexing portions 24 are provided so as to be separated from each other in the direction orthogonal to the extending direction of the strain-flexing portions 24 (the width direction of the tongue-shaped strain-generating portions 24).
The screw 27 inserted through the screw insertion hole 24b of the
By being screwed into 6b, the hard ball 18 housed in the recessed hole 16a is held in a state of contacting the lower surface of the strain-flexing portion 24. Reference numeral 19 in FIGS. 3 and 5 is a metal collar that is inserted into the screw insertion hole 24b and is interposed between the lower surface of the head of the screw 27 and the peripheral portion of the screw hole 16b.
It is designed not to apply excessive load (pressure contact force) to the.
【0019】また、図6,7,8に示すように、脚14
は、芯材である高硬度金属(例えばSK材)製のディス
ク16をインサートした樹脂の成形体で構成されてい
る。ディスク16の上面には、硬球支承部である凹穴1
6aと、ねじ27螺着用のねじ孔16bが形成されてお
り、表面樹脂層の開口部を介して凹穴16aおよびねじ
孔16bが脚14の上方に露出している。また、ディス
ク16は、樹脂に代えてゴムで被覆された構造であって
もよい。Further, as shown in FIGS.
Is formed of a resin molded body into which a disc 16 made of a high-hardness metal (for example, SK material) as a core material is inserted. The upper surface of the disk 16 has a recessed hole 1 which is a hard ball bearing.
6a and a screw hole 16b for screwing the screw 27 are formed, and the concave hole 16a and the screw hole 16b are exposed above the leg 14 through the opening of the surface resin layer. Further, the disk 16 may have a structure covered with rubber instead of resin.
【0020】なお、ロードセル20の起歪体21を構成
する素材も、起歪部24が硬球18と接触状態に保持さ
れることを考えると、硬球支承部である凹穴16aを設
けたディスク16と同様、摩滅しにくいSK材で構成す
ることが望ましい。Considering that the strain element 24 of the load cell 20 also holds the strain element 24 in contact with the hard ball 18, the disk 16 provided with the concave hole 16a serving as the hard ball bearing portion. Like SK, it is desirable that the SK material is hard to wear.
【0021】そして、図5に示すように、脚14の凹穴
16aに硬球18を収容し、起歪部24の挿通孔24b
にカラー19およびねじ27を挿通するとともに、ねじ
27を脚14のねじ孔16bに螺着することで、脚14
を起歪部24に簡単に取り付け固定でき、硬球18が凹
穴16に支承された形態に保持できる。Then, as shown in FIG. 5, the hard ball 18 is housed in the recessed hole 16a of the leg 14, and the insertion hole 24b of the strain-flexing portion 24 is inserted.
By inserting the collar 19 and the screw 27 into the screw, and screwing the screw 27 into the screw hole 16 b of the leg 14,
Can be easily attached and fixed to the strain-flexing portion 24, and the hard ball 18 can be held in a form supported by the recessed hole 16.
【0022】また、起歪部24と脚14とは一対のねじ
27,27によって締結されているが、挿通孔24bと
カラー19とねじ27との間には微小隙間があるため、
載置台12に荷重が作用すると、起歪部24と脚14
は、主に一対のねじ27,27と硬球18を通る横軸L
x周りに相対傾動(このとき硬球18が回転)して偏荷
重を吸収し、偏荷重の影響を受けない適正な歪みに対応
する荷重信号を検出する。即ち、図1に示すように、各
々のロードセル20は、それぞれの起歪部24の延出前
後方向Lyが載置台12の中心Oにおいて一致しかつ直
交しており、載置台12に作用する荷重は、このLy方
向と直交する起歪部24の横軸(傾動中心軸)Lx周り
の力として各々の起歪部24に作用し、歪みゲージ28
では偏荷重の影響を受けない荷重信号が検出される。Further, although the strain-flexing portion 24 and the leg 14 are fastened together by a pair of screws 27, 27, since there is a minute gap between the insertion hole 24b, the collar 19 and the screw 27,
When a load is applied to the mounting table 12, the strain-flexing portion 24 and the leg 14
Is the horizontal axis L that mainly passes through the pair of screws 27, 27 and the hard ball 18.
Relative tilting around x (the hard ball 18 rotates at this time) absorbs an eccentric load, and a load signal corresponding to an appropriate strain that is not affected by the eccentric load is detected. That is, as shown in FIG. 1, in each load cell 20, the extending longitudinal directions Ly of the respective strain-flexing portions 24 are coincident with and orthogonal to each other at the center O of the mounting table 12, and the load acting on the mounting table 12 is increased. Acts on each strain-generating portion 24 as a force around the horizontal axis (tilt central axis) Lx of the strain-generating portion 24 orthogonal to the Ly direction, and the strain gauge 28
In, the load signal which is not affected by the unbalanced load is detected.
【0023】また、脚14は、載置台12のコーナ部に
向かって延出する起歪部24の先端側24aに取り付け
られて、載置台12のコーナ部に接近する位置に配置さ
れている。このため、載置台12の中央以外の部位に荷
重が作用しても、脚14が載置台12のコーナ部近傍に
あるため、体重計はぐらつくことなく安定状態を保持で
きる。The leg 14 is attached to the tip end side 24a of the strain-flexing portion 24 extending toward the corner portion of the mounting table 12, and is arranged at a position close to the corner portion of the mounting table 12. Therefore, even if a load is applied to a portion other than the center of the mounting table 12, the legs 14 are located in the vicinity of the corners of the mounting table 12, so that the weight scale can maintain a stable state without wobbling.
【0024】また、本実施例では、前記したように、載
置台12と脚14との間に、別途取り付け部材を用いる
ことなくロードセル20を介装した簡潔な構造であるた
め、体重計を構成する部品点数が少なく、ロードセル2
0の取り付け作業も簡単で、薄型にして軽量なものとな
っている。Further, in the present embodiment, as described above, since the load cell 20 is interposed between the mounting table 12 and the leg 14 without using a separate mounting member, the weight scale is constructed. Load cell 2 with a small number of parts
The installation work of 0 is easy, and it is thin and lightweight.
【0025】図9および図10は本発明の第2の実施例
である体重計の要部を示し、図9は同体重計の要部であ
るロードセル取り付け部の分解斜視図、図10は同体重
計の縦断面図(第1の実施例における図3に対応する
図)である。9 and 10 show a main part of a weight scale according to a second embodiment of the present invention. FIG. 9 is an exploded perspective view of a load cell mounting part which is a main part of the weight scale, and FIG. It is a longitudinal cross-sectional view of a scale (a view corresponding to FIG. 3 in the first embodiment).
【0026】前記した第1の実施例では、馬蹄形のスペ
ーサ部材26の下面にロードセル20の周縁領域(起歪
体の周縁領域23)を固定するようになっているが、こ
の第2の実施例では、断面L字型スペーサ部材26Aの
馬蹄形フランジ部26cの上面にロードセル20の周縁
領域(起歪体の周縁領域23)を固定するようになって
いる。In the above-described first embodiment, the peripheral area of the load cell 20 (the peripheral area 23 of the flexure element) is fixed to the lower surface of the horseshoe-shaped spacer member 26. Then, the peripheral region of the load cell 20 (the peripheral region 23 of the flexure element) is fixed to the upper surface of the horseshoe-shaped flange portion 26c of the L-shaped spacer member 26A.
【0027】スペーサ部材26Aのフランジ部26cに
は、起歪体21に形成したねじ孔23aに対応するねじ
挿通孔26dが設けられており、図9矢印に示すよう
に、ロードセル20をフランジ部26cに沿ってスライ
ドさせるように押し込むと、ロードセル20は載置台1
2のコーナ部に位置決めされて、孔23aと孔26dが
一致する。そこで、図10に示すように、ねじ26bに
よりロードセル20の周縁領域(起歪体の周縁領域2
3)をスペーサ部材26Aに簡単に固定できる。A flange portion 26c of the spacer member 26A is provided with a screw insertion hole 26d corresponding to the screw hole 23a formed in the flexure element 21, and the load cell 20 is provided with a flange portion 26c as shown by an arrow in FIG. When pushed in to slide along the load cell 20, the load cell 20
The holes 23a and the holes 26d are aligned with each other by being positioned at the second corner portion. Therefore, as shown in FIG. 10, the peripheral area of the load cell 20 (the peripheral area 2
3) can be easily fixed to the spacer member 26A.
【0028】その他は前記した第1の実施例と同一であ
り、同一の符号を付すことでその重複した説明は省略す
る。Others are the same as those of the first embodiment described above, and the same reference numerals are given to omit the duplicated description.
【0029】図11は本発明の第3の実施例の要部を示
し、ロードセルと脚との取り付け構造を示す斜視図であ
る。FIG. 11 is a perspective view showing an essential part of the third embodiment of the present invention and showing the mounting structure of the load cell and the leg.
【0030】前記した2つの実施例におけるロードセル
20では、起歪部24がコーナ配置部20aに向けて延
出するように構成されているが、この第3の実施例にお
けるロードセル20Aでは、起歪部24がコーナ配置部
20aの反対側に向けて延出するように構成されてい
る。In the load cells 20 of the two embodiments described above, the strain-flexing portion 24 is configured to extend toward the corner arranging portion 20a. However, in the load cell 20A of the third embodiment, The portion 24 is configured to extend toward the opposite side of the corner placement portion 20a.
【0031】その他は前記した第1、第2の実施例と同
一であり、同一の符号を付すことでその重複した説明は
省略する。Others are the same as those of the first and second embodiments described above, and the same reference numerals are given to omit the duplicated description.
【0032】また、前記した実施例では、ロードセル2
0(起歪体21)に形成されているスリット22の幅が
一定であるが、図12に示すように、スリット22Aの
幅は一定でなくてもよい。Further, in the above-mentioned embodiment, the load cell 2
Although the width of the slit 22 formed in 0 (flexure body 21) is constant, the width of the slit 22A may not be constant as shown in FIG.
【0033】なお、前記した実施例では、載置台12が
矩形状で、ロードセル20のコーナ配置部20aが90
度の角度を持つように構成されているが、載置台12の
コーナ部およびロードセル20のコーナ配置部の角度は
90度に限られるものではなく、同一の角度を持つよう
に構成されていればよい。In the above-described embodiment, the mounting table 12 has a rectangular shape, and the corner placement portion 20a of the load cell 20 has a 90-degree width.
Although the corners of the mounting table 12 and the corners of the load cell 20 are not limited to 90 degrees, as long as they have the same angle, Good.
【0034】[0034]
【発明の効果】以上述べたように、請求項1によれば、
ロードセルを載置台の裏側所定位置にスムーズに配置で
き、しかもロードセルのスリットの外側を載置台に簡単
に固定できるので、ロードセルの載置台への取り付け作
業が簡単となる。また、従来必要とした専用の取付部材
が不要な分、体重計の構成が簡潔で、薄型かつ軽量とな
る。As described above, according to claim 1,
Since the load cell can be smoothly arranged at a predetermined position on the back side of the mounting table and the outside of the slit of the load cell can be easily fixed to the mounting table, the work of mounting the load cell on the mounting table becomes easy. In addition, the structure of the weight scale is simple, thin, and lightweight because the dedicated mounting member conventionally required is unnecessary.
【0035】請求項2によれば、ロードセルへの脚の固
定がスムーズとなるので、脚の取り付け作業が簡単とな
る。また、従来必要とした専用の取付部材が不要な分、
体重計の構成が簡潔で、薄型かつ軽量となる。According to the second aspect, the legs can be fixed to the load cell smoothly, so that the work for attaching the legs can be simplified. In addition, since the dedicated mounting member that was required in the past is unnecessary,
The structure of the scale is simple, thin and lightweight.
【0036】請求項3によれば、硬球を取付けるための
専用の取付部材や脚を設けるベースが不要な分、以下の
効果がある。第1に、体重計の構成が簡潔となる。第2
に、ロードセルの取り付け作業が簡単となる。第3に、
体重計が薄型かつ軽量となる。According to the third aspect of the present invention, the following effects can be obtained because a dedicated mounting member for mounting the hard balls and a base for providing the legs are unnecessary. First, the structure of the scale is simple. Second
In addition, the work of mounting the load cell becomes easy. Third,
The scale is thin and lightweight.
【0037】請求項4によれば、硬球支承部における耐
久性が確保されて、硬球の偏荷重吸収作用が長期にわた
り損なわれないので、偏荷重の影響を受けない高精度の
体重測定が保証される。また、脚の下表面が樹脂層また
はゴム層で形成されているので、床面を傷つけず、体重
計の座りもよい。According to the present invention, the durability of the hard ball bearing portion is ensured, and the unbalanced load absorbing action of the hard balls is not impaired for a long period of time. Therefore, highly accurate weight measurement that is not affected by the unbalanced load is guaranteed. It Further, since the lower surface of the leg is formed of the resin layer or the rubber layer, the floor surface is not damaged and the weight scale can be seated well.
【図1】本発明の第1の実施例である体重計の平面図で
ある。FIG. 1 is a plan view of a weight scale according to a first embodiment of the present invention.
【図2】同体重計の底面斜視図である。FIG. 2 is a bottom perspective view of the weight scale.
【図3】同体重計の縦断面図(図1に示す線III−IIIに
沿う断面図)である。FIG. 3 is a vertical cross-sectional view (cross-sectional view taken along line III-III shown in FIG. 1) of the weight scale.
【図4】同体重計の縦断面図(図1に示す線IV−IVに
沿う断面図)である。FIG. 4 is a vertical cross-sectional view (cross-sectional view taken along line IV-IV shown in FIG. 1) of the weight scale.
【図5】同体重計のロードセル取り付け部の分解斜視図
である。FIG. 5 is an exploded perspective view of a load cell attachment portion of the weight scale.
【図6】脚の平面図である。FIG. 6 is a plan view of a leg.
【図7】同脚の縦断面図(図6に示す線VII−VIIに沿
う断面図)ある。FIG. 7 is a vertical sectional view of the same leg (a sectional view taken along line VII-VII shown in FIG. 6).
【図8】脚にインサート成形される金属製ディスクの斜
視図である。FIG. 8 is a perspective view of a metal disk insert-molded on a leg.
【図9】本発明の第2の実施例である体重計のロードセ
ル取り付け部の分解斜視図である。FIG. 9 is an exploded perspective view of a load cell attachment portion of a weight scale according to a second embodiment of the present invention.
【図10】同体重計の縦断面図(第1の実施例における
図3に対応する図)である。FIG. 10 is a vertical cross-sectional view of the weight scale (a view corresponding to FIG. 3 in the first embodiment).
【図11】本発明の第3の実施例である体重計の要部の
斜視図である。FIG. 11 is a perspective view of a main part of a weight scale according to a third embodiment of the present invention.
【図12】本発明の第4の実施例である体重計の要部の
斜視図である。FIG. 12 is a perspective view of a main part of a weight scale according to a fourth embodiment of the present invention.
【図13】従来の体重計の縦断面図である。FIG. 13 is a vertical sectional view of a conventional scale.
10 電子体重計
12 載置台
14 脚
16 金属製ディスク
16a 硬球を支承する凹穴(凹部)
18 ロードセルに作用する偏荷重を吸収する硬球
20,20A 平板型ロードセル
20a ロードセルのコーナ配置部
21 起歪体
22,22A U字状スリット
23 載置台との取付固定部を構成する起歪体の周縁領
域
24 舌片状の起歪部
24a 脚との取付固定部を構成する起歪部先端側
26,26A スペーサ部材
26b 載置台とロードセルを締結するねじ
27 ロードセルと脚を締結するねじ
28 歪みゲージ
30 演算手段である演算制御部(CPU)
40 表示部10 Electronic Scale 12 Placement Table 14 Leg 16 Metal Disk 16a Recessed Hole (Recess) for Bearing Hard Ball 18 Hard Ball Absorbing Unbalanced Load Acting on Load Cell 20, 20A Flat Load Cell 20a Corner Arrangement Part 21 of Load Cell 22, 22A U-shaped slit 23 Peripheral region of strain-flexing body that constitutes a mounting / fixing portion with a mounting table 24 Tongue-shaped strain-flexing portion 24a Strain-deflecting portion tip side 26, 26A that constitutes a mounting / fixing portion with a leg Spacer member 26b Screws that fasten the mounting table and the load cell 27 Screws that fasten the load cell and the leg 28 Strain gauge 30 Arithmetic control unit (CPU) 40 Display unit
フロントページの続き (72)発明者 佐々木 隆康 埼玉県北本市朝日1丁目243番地 株式会 社エー・アンド・デイ開発・技術センター 内 Fターム(参考) 2F049 AA16 BA15 CA01 CA05 Continued front page (72) Inventor Takayasu Sasaki 1-243 Asahi, Kitamoto City, Saitama Stock Market A & D Development and Technology Center Within F term (reference) 2F049 AA16 BA15 CA01 CA05
Claims (4)
セルであって、 外形の一部が載置台のコーナ部と同形に形成されたコー
ナ配置部と、中央に設けられたスリットと、前記スリッ
トにより形成され、片持ち支持された舌片となる起歪部
と、前記起歪部の付け根側に配置された歪みゲージとを
備え、 前記スリットの外側を前記載置台への取付部としたこと
を特徴とするロードセル。1. A flat plate type load cell arranged on the back side of a mounting table, wherein a part of the outer shape is formed into a corner portion of the mounting table in the same shape, a slit provided in the center, and A strain-generating part formed of a slit, which is a tongue piece supported in a cantilever manner, and a strain gauge arranged on the base side of the strain-generating part are provided, and the outside of the slit is used as a mounting part to the mounting table. A load cell characterized in that
セルであって、 中央に設けられたスリットと、前記スリットにより形成
され、片持ち支持で下側に取り付けられる脚の外形にほ
ぼ倣った形状の起歪部と、前記起歪部の付け根側に配置
された歪みゲージとを備え、 前記起歪部の先端側を前記脚の取付部としたことを特徴
とするロードセル。2. A flat plate type load cell arranged on the back side of a mounting table, which substantially follows the outer shape of a slit provided in the center and a leg formed by the slit and attached to the lower side by cantilever support. A load cell comprising: a strain-generating portion having a shape; and a strain gauge arranged on a base side of the strain-generating portion, wherein a tip side of the strain-generating portion serves as a mounting portion of the leg.
四隅に配置され、平板状の起歪部をもつロードセルと、
前記ロードセルの荷重信号を集計する演算手段と、前記
演算手段の計量値をデジタル表示する表示手段と、前記
ロードセルの起歪部に取り付けられた脚と、前記起歪部
と脚との間に配置されて荷重を伝達する硬球とを備え、 前記脚の上面に硬球支承用の凹部が設けられ、前記硬球
が前記起歪部の下面に接触することを特徴とする電子体
重計。3. A rectangular mounting table, and a load cell arranged at four corners on the back side of the mounting table and having a flat plate-shaped strain generating section,
Arranged between the calculation means for totalizing the load signals of the load cell, the display means for digitally displaying the measured value of the calculation means, the leg attached to the strain-flexing part of the load cell, and the strain-flexing part and the leg. An electronic weight scale, comprising: a hard ball that is configured to transmit a load, a recess for supporting a hard ball is provided on an upper surface of the leg, and the hard ball contacts a lower surface of the strain-flexing portion.
締結用のねじ孔とを設けた金属プレートを用い、これを
樹脂またはゴムにインサートした成形体で構成されたこ
とを特徴とする請求項3に記載の電子体重計。4. The metal plate provided with a recess for supporting a hard ball and a screw hole for fastening a strain-flexing part is used as the leg, and the leg is made of a molded body inserted into resin or rubber. The electronic weight scale according to claim 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001349691A JP3842623B2 (en) | 2001-11-15 | 2001-11-15 | Load cell and electronic scale |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001349691A JP3842623B2 (en) | 2001-11-15 | 2001-11-15 | Load cell and electronic scale |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2003149038A true JP2003149038A (en) | 2003-05-21 |
JP3842623B2 JP3842623B2 (en) | 2006-11-08 |
Family
ID=19162321
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JP2001349691A Expired - Fee Related JP3842623B2 (en) | 2001-11-15 | 2001-11-15 | Load cell and electronic scale |
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EP1876433A2 (en) * | 2006-07-07 | 2008-01-09 | Mettler-Toledo GmbH | Weighing module |
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WO2020184303A1 (en) * | 2019-03-13 | 2020-09-17 | 株式会社タニタ | Weight-measuring device |
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JP3008977U (en) * | 1994-09-13 | 1995-03-28 | 日本特殊測器株式会社 | Vehicle weight measuring device |
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