JPS5895234A - Load cell - Google Patents
Load cellInfo
- Publication number
- JPS5895234A JPS5895234A JP19342781A JP19342781A JPS5895234A JP S5895234 A JPS5895234 A JP S5895234A JP 19342781 A JP19342781 A JP 19342781A JP 19342781 A JP19342781 A JP 19342781A JP S5895234 A JPS5895234 A JP S5895234A
- Authority
- JP
- Japan
- Prior art keywords
- distortion
- resistance wire
- gauges
- pal
- donkey
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
- G01L1/2243—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being parallelogram-shaped
Abstract
Description
【発明の詳細な説明】 本発明はロバ−パル型ロードセルにＩ＆ｔル。[Detailed description of the invention] The present invention is applicable to donkey pal type load cells.
−１１９にロバ−パル塑ロードセルは、荷重を受ける第
１の剛性はり部と、ベースに固定さね、かつ上記第１の
剛性はり部と平行な第２の剛性はり部、およびごれらに
直交してこれらを連結する、Ｉ７−いに平行な２本の弾
性はり部とからなるロバ−パル機構体を基本構成体″と
し、上言己第１の剛性はり部に荷重を加えたときに生ず
るロバ−パル機構体の弾性変形を利用して抵抗線歪ゲー
ジ等によってその荷重を電気的信号に変換するものであ
る。-119, the Roba Pal plastic load cell has a first rigid beam that receives a load, a second rigid beam that is fixed to the base and is parallel to the first rigid beam, and a second rigid beam that is parallel to the first rigid beam. The basic structure is a donkey pal mechanism consisting of two parallel elastic beams that connect these at right angles, and when a load is applied to the first rigid beam. The elastic deformation of the donkey pal mechanism that occurs is used to convert the load into an electrical signal using a resistance wire strain gauge or the like.
従来のロバ−パル型ロードセルは、第１図に示す如く、
ロバ−パル機構体を構成する２本の弾性はり部１，２の
↓・下面にそれぞれ抵抗線中ゲージ３．４．５．６を貼
り付け、歪を検出するものや、あるいは第２図に示す如
く、ロバ−パル機構体の内側に起歪体７を設け、その起
歪体の上・下面に抵抗線中ゲージを貼り付け、歪を検出
するものであった。The conventional donkey pal type load cell, as shown in Fig. 1,
A resistance wire medium gauge 3.4.5.6 is pasted on the lower and lower surfaces of the two elastic beams 1 and 2 that make up the donkey pal mechanism, respectively, to detect strain, or as shown in Figure 2. As shown, a strain-generating body 7 was provided inside the donkey pal mechanism, and resistance wire medium gauges were attached to the upper and lower surfaces of the strain-generating body to detect strain.
前者の従来のロバ−パル型ロードセルは、抵抗線歪ゲー
ジの貼り付は位置がロバ−パル機構体の両端部に離れる
ので、ロバ−パル機構体周辺の温度が均一でない場合に
測定値に誤差を生じる欠陥があり、後者の従来のロバ−
パル型ロードセルは、゛抵抗線歪ゲージをロバ−パル機
構体の内部の起歪体７に集中して貼り付けることができ
るので、上述のような欠陥を侍女ないが、ロバ−パル機
構体内部の狭い部分に抵抗線歪ゲージを貼り付ける作業
が困傑であり、コストが高くなる欠点があった。In the former conventional donkey-pal type load cell, the resistance wire strain gauge is attached at a distance from both ends of the donkey-pal mechanism, so if the temperature around the donkey-pal mechanism is not uniform, errors may occur in the measured values. There is a defect that causes the latter
With the PAL type load cell, the resistance wire strain gauges can be concentratedly attached to the strain body 7 inside the donkey pal mechanism, so there is no such defect as mentioned above. The work of attaching the resistance wire strain gauge to the narrow part of the wire was difficult, and the cost was high.
本発明は上記に檻みなされたものであって、温度による
誤差が少なく、かつ製作の作業性をも改善したロバ−パ
ル型ロードセルの提供を目的とする。An object of the present invention is to provide a donkey-pal type load cell which is similar to the above-mentioned structure and has less temperature-related errors and improved manufacturing workability.
以下、図面に従って本発明実施例を説明する。Embodiments of the present invention will be described below with reference to the drawings.
第３図は本発明実施例の構成図である。FIG. 3 is a configuration diagram of an embodiment of the present invention.
起歪体１１は望ましくはその一部に、他部に比して充公
小さい断面係数を持った歪検出部１２（同一断面でも実
施は可能）と、荷重ｗを受ける方向に対してその（へ）
１面か薄くなるような上下からの２つの切欠部１３．１
４とを備えており、走検出部１２の上・下面には抵抗線
中ゲージＳが貼り付けられている。この起歪体１１の両
端部は上下から起歪体１１と平行に２本の弾性はり１５
゜１６によって挟着固定されており、２つの弾性はり部
１５．１６と２つの剛性はり部１７．１８を持ったロバ
−パル機構体を形成する。The strain-generating body 11 desirably has a strain detecting section 12 (which can be implemented even in the same cross section) having a substantially smaller section modulus than the other sections, and a strain detecting section 12 that has a section modulus smaller than that of the other section, and a strain detecting section 12 that has a section modulus smaller than that of the other section. )
Two notches 13.1 from above and below that are thinner on one side
4, and resistance wire medium gauges S are affixed to the upper and lower surfaces of the running detection section 12. Both ends of this strain body 11 have two elastic beams 15 extending parallel to the strain body 11 from above and below.
16 to form a donkey pal mechanism having two elastic beams 15.16 and two rigid beams 17.18.
このロバ−パル機構体の一方の剛性はり部１８をペース
に固定し、もう一方の剛性はり部１７に矢印の方向に荷
重が付与されると、ロバ−パル機構体の圧力が付与され
た剛性はり部１７は２つの弾性はりＮ１５．１６のたわ
みにより平行移動する。このとき起歪体１１は上記剛性
はり部１７の動きにより曲げモーメントを受けて主とし
て小さな断面係数を持った歪検出部１２がたわみ、そこ
に貼り伺けられである抵抗線歪ゲージＳはこの量を電気
的信号に変換して出力する。When one rigid beam part 18 of this donkey pal mechanism is fixed to the pace and a load is applied to the other rigid beam part 17 in the direction of the arrow, the rigidity of the donkey pal mechanism is increased by the pressure applied. The beam portion 17 moves in parallel due to the deflection of the two elastic beams N15 and N16. At this time, the strain-generating body 11 receives a bending moment due to the movement of the rigid beam portion 17, and the strain detection portion 12, which has a small section modulus, is deflected, and the resistance wire strain gauge S attached thereto is deflected by this amount. is converted into an electrical signal and output.
ロバ−パル機構体の剛性はり部１７の平行移動変位と起
歪体１１の曲げによるたわみ変位との荷重付加方向と直
角方向の変位差は、起歪体１１に荷重を受−ける方向に
対して薄くなるように設けられた切欠部１３．１４によ
って解消される。なお、１−検出部か小さな断面係数が
望ましい理由は、弾性はり１５．１６との組付部を太く
して、より確実な固定が得られるからであり、同一断面
であっても本発明の集塊は可能である。The displacement difference in the direction perpendicular to the load application direction between the parallel displacement of the rigid beam portion 17 of the donkey pal mechanism and the deflection displacement due to bending of the strain body 11 is as follows: This is solved by the cutouts 13.14, which are provided to be thinner. The reason why it is desirable to have a small section modulus for the 1-detection section is that by making the assembly section with the elastic beam 15 and 16 thicker, more reliable fixation can be obtained. Agglomeration is possible.
以上説明したように、本発明によっては、抵抗線歪ゲー
ジを１箇所に集中して貼り付けることかできるため、温
度による測定誤差か少なく、シかもこのロバ−パル機構
体は一体構造ではないので、抵抗線歪ゲージの貼り付は
作業も容易になし得、特に、はかり等に組み込んで使用
する場合においては温度による測定誤差の少ない高精度
なはがりを低価格で提供することができる。As explained above, according to the present invention, since the resistance wire strain gauge can be concentrated and pasted in one place, there is less measurement error due to temperature. The work of attaching the resistance wire strain gauge can be done easily, and in particular, when it is incorporated into a scale or the like, a highly accurate strain gauge with little measurement error due to temperature can be provided at a low price.
第１図、第２図は従来のロバ−パル型ロードセルの構成
図、第３図は米発明実施例の構成図を示す。
１１・・・・・・起歪体
１５．１６・・・・・・弾性はり
１７．１８・・・・・・剛性はり部
Ｓ・・・・・・抵抗線歪ゲージ
特許出願人 株式会社島津製作所
代理人 西 １）新1 and 2 are block diagrams of a conventional donkey pal type load cell, and FIG. 3 is a block diagram of an embodiment of the invention. 11...Strain body 15.16...Elastic beam 17.18...Rigid beam S...Resistance wire strain gauge patent applicant Shimadzu Corporation Factory agent Nishi 1) Arata
Claims (1)
起歪体の両端部のみに当接して起歪体を挟持する２個の
弾性はつとによりロバ−パル機構体を形成してなるロー
ドセル。A donkey pal mechanism is formed by a notch that can absorb expansion and contraction in the longitudinal direction of the flexure element and two elastic parts that sandwich the flexure element by contacting only the opposite ends of the flexure element. A load cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19342781A JPS5895234A (en) | 1981-11-30 | 1981-11-30 | Load cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19342781A JPS5895234A (en) | 1981-11-30 | 1981-11-30 | Load cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5895234A true JPS5895234A (en) | 1983-06-06 |
| JPS6224734B2 JPS6224734B2 (en) | 1987-05-29 |
Family
ID=16307784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19342781A Granted JPS5895234A (en) | 1981-11-30 | 1981-11-30 | Load cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5895234A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994161A (en) * | 1975-06-11 | 1976-11-30 | Trozera Thomas A | Load cell |
-
1981
- 1981-11-30 JP JP19342781A patent/JPS5895234A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994161A (en) * | 1975-06-11 | 1976-11-30 | Trozera Thomas A | Load cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6224734B2 (en) | 1987-05-29 |
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