JPS5987331A - Load cell - Google Patents
Load cellInfo
- Publication number
- JPS5987331A JPS5987331A JP19825982A JP19825982A JPS5987331A JP S5987331 A JPS5987331 A JP S5987331A JP 19825982 A JP19825982 A JP 19825982A JP 19825982 A JP19825982 A JP 19825982A JP S5987331 A JPS5987331 A JP S5987331A
- Authority
- JP
- Japan
- Prior art keywords
- strain
- strain gauge
- load cell
- coating material
- gauge
- 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
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/1402—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
- G01G3/1412—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being parallelogram shaped
-
- 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
-
- 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
- G01L1/2287—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 constructional details of the strain gauges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Force In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、主として秤に用いられるロードセルに関し、
該ロードセルの精度を低下させること４−く、耐久性の
向上を図るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a load cell mainly used in a scale.
The purpose is to improve the durability of the load cell without reducing its accuracy.
この種のロードセルに、加えられた荷重に対応する起歪
体の歪量を該起歪体に貼着されたストレインゲージによ
って電気的に検出するように構成したものであるが、特
に水分や湿気の多い環境１゛使用されることが多い秤用
のロードセルにあっては、所要の耐久性を得るためには
、上記スト１／インゲージを水分や湿気から保護する必
要がある。This type of load cell is configured to electrically detect the amount of strain in a strain body corresponding to an applied load using a strain gauge attached to the strain body. In load cells for scales that are often used in environments with a large number of environments, it is necessary to protect the above-mentioned strike 1/in gauge from water and humidity in order to obtain the required durability.
そこで、従来においては、ストレインゲージをシリコー
ンゴム等で被覆し、或は金属箔でシールする等の防湿処
理が行われている。Therefore, in the past, moisture-proofing treatments such as coating strain gauges with silicone rubber or the like or sealing them with metal foil have been performed.
然るに、これらの防湿処理によると、シリコーンゴムや
金属箔等の被覆材がストレインゲージに直接接着される
ため、起歪体の変形に伴うストレインゲージの伸縮が該
被覆材によって束縛されることになって、当該ロードセ
ルの荷重や電気出力特性の直線性が損われるという問題
を生じる。However, with these moisture-proof treatments, the coating material such as silicone rubber or metal foil is directly adhered to the strain gauge, so the expansion and contraction of the strain gauge due to the deformation of the strain body is restricted by the coating material. This causes a problem in that the linearity of the load and electrical output characteristics of the load cell is impaired.
本発明は、起歪体にストレインゲージを貼着してなるロ
ードセルにむける上記の如き問題に対処するもので、ス
トレインゲージの機能を阻害しないように、該ストレイ
ンゲージを防湿処理して、ロードセルとしての精度の低
下を来たすことなく、該ロードセルの耐久性の向上を図
ることを目的とする。The present invention addresses the above-mentioned problems with load cells in which a strain gauge is attached to a strain-generating body, and the strain gauge is subjected to moisture-proofing treatment so as not to inhibit the function of the strain gauge, so that it can be used as a load cell. The purpose of the present invention is to improve the durability of the load cell without reducing the accuracy of the load cell.
即ち、本発明に係るロードセルは、起歪体に貼着された
スト１〜インゲージの上に、化学的にくっつきにくい性
質を有するテフロンシートを非接着的に被せると共に、
その上から適宜被覆材でやυ覆する構成としたことを特
徴とする。このような構成によれば、ススレインゲージ
か被范材によって伸縮を妨げられることなく、且つ該被
覆材によって水分や湿気から保護されることになり、上
記の目的が達成される。That is, in the load cell according to the present invention, a Teflon sheet having chemically non-stick properties is covered on the strain gauges 1 to 1 in gauges attached to the strain-generating body in a non-adhesive manner, and
It is characterized by a structure in which it is covered with a suitable covering material from above. According to such a configuration, the expansion and contraction are not hindered by the rain gauge or the covering material, and the covering material protects from water and moisture, so that the above object is achieved.
以下、本発明を図面に示す実施例に基いて説明する。Hereinafter, the present invention will be explained based on embodiments shown in the drawings.
第１図において、１は秤本体Ａとその上部に備えられた
計量皿Ｂとの間にブラケツｌ−Ｃ，Ｄを介して装着され
たロードセルで、第２図に示すように、該ロードセルの
本体となる起歪体２は、」１記ブラケットＣを介して秤
本体Ａに固定される一端の固定剛体部３と、上記ブラケ
ットＤを介して計量皿Ｂが固着される他端の可動剛体部
４と、両開体部３，４の上、下端部間に設けられた上部
ビーム部５及び下部ビーム！ｌｓ６とによって中空の四
辺形状とされている。そして、−，１−記十部ビーム部
５及び下部ビーム部６には、半円状の切込み５ａ。In Fig. 1, reference numeral 1 denotes a load cell installed between the scale main body A and the weighing pan B provided on its upper part via brackets 1-C and D. As shown in Fig. 2, the load cell 1 is The strain-generating body 2 serving as the main body includes a fixed rigid body part 3 at one end which is fixed to the scale body A via the bracket C mentioned above, and a movable rigid body part at the other end to which the weighing pan B is fixed via the bracket D. part 4, and an upper beam part 5 and a lower beam provided between the upper and lower ends of both open body parts 3 and 4! It has a hollow quadrilateral shape with ls6. The beam portion 5 and the lower beam portion 6 are provided with semicircular notches 5a.
６ａによって肉厚が薄くされた可撓部５ｂ、６ｂが夫々
２個所ずつ形成され、Ｉ土つ各可撓、部の表面にストレ
インケージ７・・７か夫々貼着されている。Flexible portions 5b and 6b each having a thinner wall thickness are formed at two locations by 6a, and strain cages 7 are adhered to the surfaces of each of the flexible portions.
然して、第３，４図に示すように各スト１／インゲージ
７の」二にはテフロンノート８が被せられていると共に
、その上からテフロンシートを完全に覆つヨウにシリコ
ーンゴム、フチルゴム或６１ポリウレタン等の被覆相９
が塗布又−デイツビング処理等によってコーチイブされ
ている。ここで、上記テフロンシート８は各ストレイン
ゲージ７の上に非接着的に被せたたけ、即ち接着剤等を
用いずにストレインゲージの上に載せただけであって、
その上からコーティングされた被覆材９によって起歪体
２の表面に定着されている。As shown in FIGS. 3 and 4, a Teflon notebook 8 is placed over each stroke 1/in-gauge 7, and silicone rubber, phthyl rubber, or Coating phase 9 such as polyurethane
has been coached by coating or dating treatment. Here, the Teflon sheet 8 is placed on each strain gauge 7 in a non-adhesive manner, that is, it is simply placed on the strain gauge without using an adhesive or the like.
It is fixed to the surface of the strain-generating body 2 by a coating material 9 coated thereon.
上記の構成によれば、起歪体２の各可撓部５ｂ。According to the above configuration, each flexible portion 5b of the strain body 2.
６１）の表面に貼着されたストレインゲージ７・・・７
は、被覆材９によって水分や湿気から保護されるのであ
るが、その場合に、各ストレインゲージ７と被覆材９と
の間には夫々テフロンシート８がストレインゲージに対
して非接着的に介在されて、各ストレインゲージ７が起
歪体２のみに接合された状態とされている。61) Strain gauges 7...7 attached to the surface of
are protected from water and moisture by the covering material 9. In this case, a Teflon sheet 8 is interposed between each strain gauge 7 and the covering material 9 without adhesion to the strain gauge. Thus, each strain gauge 7 is connected only to the strain body 2.
従って、第１図に示す計量＠Ｂに被計殴物を・１＆置し
た場合において、起歪体２における可動剛体部４が下方
に変位することに伴って−に１部ビーム部５及び下部ビ
ーム部６の各可撓部５ｂ、６１）の表面が伸張又は収縮
した際に、該可撓部の表面に貼着された上記各ストレイ
ンゲージ７・・・７が被ｕ４Ｎ９に束縛されることなく
、可撓部表面の伸縮に忠実に追従Ｉて伸縮することにな
る。こねにより、起歪体２の歪量、即ち上記被計量物の
重数がストレインゲージからの電気出力として精度良く
検出されることになる。Therefore, when the object to be weighed is placed in the weighing area @B shown in FIG. When the surface of each flexible portion 5b, 61) of the beam portion 6 is expanded or contracted, each of the strain gauges 7...7 affixed to the surface of the flexible portion is bound to the u4N9. Instead, it expands and contracts by faithfully following the expansion and contraction of the surface of the flexible part. By kneading, the amount of strain in the strain body 2, that is, the weight of the object to be weighed, can be detected with high precision as an electrical output from the strain gauge.
次に、第５〜７図に示す本発明の他の実施例について説
明する。尚、以下の実施例において、「アルミ蒸着テー
プ」とは、基材の一面にアルミ蒸着膜が設けられ、他面
に又ｋｉアルミ蒸着膜に更に予め粘着剤を塗布したもの
をいい、［アルミ蒸着フィルム］とは、基材の一面にア
ルミ蒸着膜が設けられたものをいう。Next, other embodiments of the present invention shown in FIGS. 5 to 7 will be described. In the following examples, the term "aluminum vapor-deposited tape" refers to a substrate in which an aluminum vapor-deposited film is provided on one side, and an adhesive is further applied to the aluminum vapor-deposited film on the other side. Vapor-deposited film] refers to one in which an aluminum vapor-deposited film is provided on one side of a base material.
第５図に示す実施例は、被覆材として」−記実ＫＩＩ例
におけるシリコーンゴム等のコーティングに代えて、ア
ルミ蒸着テープ９′を用いたもの・である。The embodiment shown in FIG. 5 uses an aluminum vapor-deposited tape 9' as a covering material in place of the silicone rubber coating in the KII example.
このアルミ蒸着テープ９′は、ポリエステル等でなる基
材９ａ’の一面にアルミ蒸着膜９ｂ’ を設けると共に
、更にアクリル系等の粘着剤９ ｃｌ を予め塗布した
ものである。そして、該実施例においては、起歪体２に
おける可撓部表面に貼着した各ストレインゲージ７の」
二にテフロンシート８を非接着的に被せた後、その上方
から」二記了ルミ蒸着テープ９′が貼着される。尚、該
アルミ蒸着テープ９′に代えて、基材９ａ’の一面にア
ルミ蒸着膜９Ｉ）′ を設け、更にこのアルミ蒸着膜の
」−に粘着剤９ｃ’を予め塗布したアルミ蒸着テープを
用いてもよい。This aluminum vapor-deposited tape 9' has an aluminum vapor-deposited film 9b' provided on one surface of a base material 9a' made of polyester or the like, and is further coated with an acrylic adhesive 9 cl in advance. In this embodiment, each strain gauge 7 attached to the surface of the flexible part of the strain body 2 is
After covering the Teflon sheet 8 in a non-adhesive manner, a luminous vapor deposition tape 9' is applied from above. Incidentally, instead of the aluminum vapor-deposited tape 9', an aluminum vapor-deposited film 9I)' is provided on one surface of the base material 9a', and an aluminum vapor-deposited tape on which an adhesive 9c' is applied in advance to the surface of this aluminum vapor-deposited film is used. It's okay.
また、第６図に示す実施例は、被覆材としてアルミ蒸着
フィルム９〃を用いたものである。この了シフの」−に
非接着的に被せたテフロンシート８の上ｍ及びその周辺
に接着剤１０を塗布した上で、」１記アルミ蒸着フィル
ム９〃が貼着さ市１する。Further, the embodiment shown in FIG. 6 uses an aluminum vapor-deposited film 9 as the covering material. An adhesive 10 is applied to the top and surrounding area of the Teflon sheet 8 which is non-adhesively covered on the surface of the film, and then the aluminum vapor-deposited film 9 is pasted.
更に、第７図に示す実施例においては、被覆利としてア
ルミ箔９″が用いられ、該アルミ箔９′″が、第６図に
示す実施例と同様に接着剤１０を用いてストレインゲー
ジ７に被せられたテフロンシート８を覆うように貼着さ
れる。Furthermore, in the embodiment shown in FIG. 7, an aluminum foil 9'' is used as the coating material, and the aluminum foil 9'' is attached to the strain gauge 7 using adhesive 10 in the same manner as in the embodiment shown in FIG. It is attached so as to cover the Teflon sheet 8 placed on the surface.
第５〜７図に示す各実施例においては、アルミ蒸着膜９
ｂ’ 、９ｂ〃又はアルミ箔９″がストレインゲージ７
を水分や湿気から保護するのであるが、これらの実施例
においても、第１〜４図に示す実施例と同様にストレイ
ンゲージ７と被覆材９′。In each of the embodiments shown in FIGS. 5 to 7, the aluminum vapor deposited film 9
b', 9b〃or aluminum foil 9'' is strain gauge 7
In these embodiments, the strain gauge 7 and the covering material 9' are used similarly to the embodiments shown in FIGS. 1 to 4.
９．７．９ＩＮとの間にテフロンシート８が介在されて
いるから、該ストレインゲージが起歪体の変形に精度良
く追従する。Since the Teflon sheet 8 is interposed between 9.7.9IN, the strain gauge can accurately follow the deformation of the strain body.
以上のように本発明は、起歪体に設けられた可撓部にス
トレインゲージが貼着されてなるロードセルにおいて、
上記ストレインゲージをその」−に非接着的に被せたテ
フロンシートを介して被覆材で被薇する構成としたから
、該ストレインゲージが、起歪体の変形に伴う伸縮を上
記被覆材によって束縛されることなく、水分や湿気から
保護されることになる。これにより、水分や湿気の多い
環境で使用されることが多い栓用のロードセルとして、
耐久性に優れ且つ秤量精度の良いロードセルが実現され
る。As described above, the present invention provides a load cell in which a strain gauge is attached to a flexible portion provided on a strain-generating body.
Since the strain gauge is covered with a covering material through a Teflon sheet that is non-adhesively covered, the strain gauge is restrained by the covering material from expanding and contracting due to deformation of the strain-generating body. You will be protected from moisture and moisture without having to worry about it. As a result, it can be used as a load cell for plugs that are often used in environments with a lot of water and humidity.
A load cell with excellent durability and high weighing accuracy is realized.
第１図は本発明ロードセルの使用状態を示す正面図、第
２図は本発明ロードセルの第１実施例を示す正面図、第
３，４図は該実施例の要部斜視図及び要部拡大断面図、
第５．６．７図は夫々本発明の第２．第３．第４実施例
を示す要部斜視図である。
■・・ロードセル、２−・起歪体、５ｂ、６ｂ・・可撓
部、７・・・ストレインゲージ、８・テフロンシート、
ｇ 、 ｇ＋ 、 ｇｎ 、 ｇｉｒ＋・・・被覆材出
願人 株式会社石田衡器製作所
特開昭５９−８７３３１ （４）Fig. 1 is a front view showing the load cell of the present invention in use, Fig. 2 is a front view showing the first embodiment of the load cell of the present invention, and Figs. 3 and 4 are a perspective view and an enlarged view of the main parts of the embodiment. cross section,
Figures 5.6.7 and 5.6.7 respectively show the second embodiment of the present invention. Third. FIG. 7 is a perspective view of main parts showing a fourth embodiment. ■ Load cell, 2- Strain body, 5b, 6b Flexible part, 7 Strain gauge, 8 Teflon sheet,
g, g+, gn, gir+...Covering material applicant: Ishida Koki Seisakusho Co., Ltd. JP-A-59-87331 (4)
Claims (1)
貼着されてなるロードセルであって、上記ストレインゲ
ージが、その上に非接着的に被せられたテフロンシート
を介して、適宜被覆材によって被覆されていることを特
徴とするロードセル。(1) A load cell in which a strain gauge is attached to a flexible part provided on a strain-generating body, and the strain gauge is appropriately coated with a Teflon sheet that is non-adhesively placed thereon. A load cell characterized by being covered with a material.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19825982A JPS5987331A (en) | 1982-11-10 | 1982-11-10 | Load cell |
| DE8383306472T DE3378167D1 (en) | 1982-10-26 | 1983-10-25 | Load cell and method for its manufacture |
| EP83306472A EP0107966B2 (en) | 1982-10-26 | 1983-10-25 | Load cell and method for its manufacture |
| AU20562/83A AU547838B2 (en) | 1982-10-26 | 1983-10-25 | Load cell |
| US06/545,473 US4557150A (en) | 1982-10-26 | 1983-10-26 | Load cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19825982A JPS5987331A (en) | 1982-11-10 | 1982-11-10 | Load cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5987331A true JPS5987331A (en) | 1984-05-19 |
| JPH0221733B2 JPH0221733B2 (en) | 1990-05-16 |
Family
ID=16388149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19825982A Granted JPS5987331A (en) | 1982-10-26 | 1982-11-10 | Load cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5987331A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284612A (en) * | 1985-06-11 | 1986-12-15 | Tokyo Electric Co Ltd | Load cell |
| JPS62179613A (en) * | 1986-02-03 | 1987-08-06 | Matsushita Electric Ind Co Ltd | Weight detector |
-
1982
- 1982-11-10 JP JP19825982A patent/JPS5987331A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284612A (en) * | 1985-06-11 | 1986-12-15 | Tokyo Electric Co Ltd | Load cell |
| JPS62179613A (en) * | 1986-02-03 | 1987-08-06 | Matsushita Electric Ind Co Ltd | Weight detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0221733B2 (en) | 1990-05-16 |
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