JPH0731074B2 - Weight detector - Google Patents
Weight detectorInfo
- Publication number
- JPH0731074B2 JPH0731074B2 JP25286187A JP25286187A JPH0731074B2 JP H0731074 B2 JPH0731074 B2 JP H0731074B2 JP 25286187 A JP25286187 A JP 25286187A JP 25286187 A JP25286187 A JP 25286187A JP H0731074 B2 JPH0731074 B2 JP H0731074B2
- Authority
- JP
- Japan
- Prior art keywords
- load
- weight
- leaf spring
- load point
- weight sensor
- 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.)
- Expired - Lifetime
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measurement Of Force In General (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、重量検知器に関するものである。TECHNICAL FIELD The present invention relates to a weight detector.
従来の技術 従来、この種の重量検知器は第５図に示すように、上下
に電極１をもつアルミナ基板２、３を、その周辺部を環
状に、適当な間隔を保持するよう封着ガラスなどで固着
してなる静電容量型重量センサ素子４と、ダイアフラム
として動作する上のアルミナ基板２の中央部に上部から
凸面状の円筒体からなる金属製の荷重点５を、中央部に
円形の貫通孔を有するカバー９で上下自在に固定し、前
記荷重点５が物体を載置する荷重台６の重量を支える構
成であった。2. Description of the Related Art Conventionally, as shown in FIG. 5, a weight detector of this type conventionally includes alumina substrates 2 and 3 having electrodes 1 on the upper and lower sides, and a sealing glass so that the peripheral portions thereof are formed into an annular shape and are kept at appropriate intervals. A capacitive weight sensor element 4 that is fixedly attached by means of, for example, and a metal load point 5 consisting of a convex cylindrical body from the top in the center of the upper alumina substrate 2 that operates as a diaphragm, and a circle in the center. The cover 9 having the through hole is vertically fixed so that the load point 5 supports the weight of the load table 6 on which the object is placed.
尚、荷重台６の支柱７は、支持部８で上下動可能なよう
に、かつ垂直に支持されていた。９は荷重点５を、重量
センサ素子４の中央部に固定するためのカバーである。The support column 7 of the load platform 6 was vertically supported by the support portion 8 so as to be vertically movable. Reference numeral 9 is a cover for fixing the load point 5 to the central portion of the weight sensor element 4.
荷重台６に載置された物体は、支柱７および荷重点５を
介して、アルミナ・ダイアフラム２を屈曲させ、上下の
電極１の間に形成される静電容量を変化させていた。こ
の静電容量の変化を検知し、アルミナ・ダイアフラムに
加えられる重量を求め、静電容量型重量検知器として動
作させていた。The object placed on the load stand 6 bends the alumina diaphragm 2 via the support column 7 and the load point 5 to change the capacitance formed between the upper and lower electrodes 1. Detecting this change in capacitance, the weight added to the alumina diaphragm was determined, and it was operated as a capacitance type weight detector.
発明が解決しようとする問題点 しかしながら上記のような構成では、荷重台６に衝撃荷
重が印加されると、荷重点５の下部周辺部と、アルミナ
・ダイアフラム２との接する部分でアルミナ・ダイアフ
ラムにクラックが発生し、アルミナ・ダイアフラム２が
破断するという問題点を有していた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described configuration, when an impact load is applied to the load platform 6, the alumina diaphragm is contacted with the alumina diaphragm at the lower peripheral portion of the load point 5 and the alumina diaphragm 2. There was a problem that a crack was generated and the alumina diaphragm 2 was broken.
本発明はかかる従来の問題を解消するもので、衝撃荷重
が、荷重台６に印加されてもアルミナ・ダイアフラム２
が破断しない構成を提供することを目的とする。The present invention solves such a conventional problem. Even when an impact load is applied to the load base 6, the alumina diaphragm 2
It is an object of the present invention to provide a structure that does not break.
問題点を解決するための手段 上記問題点を解決するために、本発明の重量検知器は荷
重により静電容量が変化する静電容量型重量センサと、
物体を載置する荷重台の重量を受けその荷重を前記重量
センサに付与する荷重点と、前記荷重点を上下自在に固
定するために前記荷重点を貫通する貫通孔を有するカバ
ーとを備え、前記重量センサと前記荷重台との間に前記
重量センサと前記荷重台との間の摩擦を減ずる流動層を
設けた構成を備えたものである。Means for Solving the Problems In order to solve the above problems, the weight detector of the present invention is a capacitance type weight sensor whose capacitance changes with load,
A load point for receiving the weight of a load table on which an object is placed and applying the load to the weight sensor, and a cover having a through hole penetrating the load point for vertically fixing the load point, A fluidized bed that reduces friction between the weight sensor and the load platform is provided between the weight sensor and the load platform.
作用 本発明は上記の構成によるため、荷重点５とアルミナ・
ダイアフラム２との間の摩擦が減少し、その結果アルミ
ナ・ダイアフラム２にクラックが発生し難くなり、衝撃
荷重に対して強くなるものである。Action Since the present invention has the above-mentioned configuration, the load point 5 and the alumina
Friction with the diaphragm 2 is reduced, and as a result, cracks are less likely to occur in the alumina diaphragm 2 and the alumina diaphragm 2 becomes stronger against impact load.
実施例 本発明の実施例を添付図面にもとづき説明する。第１図
において、10は重量センサ素子４のアルミナ・ダイアフ
ラム２と、荷重点５との界面に設けられた流動層を示
す。流動層は、グリース、シリコン油、シリコンワック
スなどの不揮発生の流動体を用いて形成した。Embodiment An embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a fluidized bed provided at the interface between the alumina diaphragm 2 of the weight sensor element 4 and the load point 5. The fluidized bed was formed using a non-volatile fluid such as grease, silicone oil, or silicone wax.
第２図に、衝撃荷重に対する破断強度特性を示す。尚、
荷重点５の円筒部の外径はφ4mm、アルミナ・ダイアフ
ラム２のダイアフラム径はφ24mm、板厚は0.5mmとし
た。衝撃荷重は5kgを、4cmの高さから荷重台６の上に落
下して与えた。同図において、11は本発明に基ずき、荷
重点５とアルミナ・ダイアフラム２との間に流動層10が
ある場合の結果であり、12は従来例の流動層10が無い場
合の結果を示す。同図は横軸に衝撃回数を、縦軸に各５
台ずつ実施し、破断した割合（％）を表示した。FIG. 2 shows the breaking strength characteristics against impact load. still,
The outer diameter of the cylindrical portion at the load point 5 was φ4 mm, the diaphragm diameter of the alumina diaphragm 2 was φ24 mm, and the plate thickness was 0.5 mm. The impact load was 5 kg, which was dropped from a height of 4 cm onto the load table 6. In the figure, 11 is the result based on the present invention when the fluidized bed 10 is present between the load point 5 and the alumina diaphragm 2, and 12 is the result when the fluidized bed 10 of the conventional example is not present. Show. In the figure, the horizontal axis represents the number of impacts and the vertical axis represents 5
The test was performed one by one, and the rate (%) of breakage was displayed.
従来例の場合、２回から15回で全て破断していたが、本
発明の実施例の場合、20回から40回で破断した。実用上
10回以上の衝撃荷重に耐えれば問題がないため、充分効
果があると判定した。In the case of the conventional example, all the fractures were made 2 to 15 times, but in the case of the example of the present invention, the fractures were made 20 to 40 times. Practically
Since there is no problem if it can withstand an impact load of 10 times or more, it was determined that the effect was sufficient.
次に、本発明の他の実施例を第３図、第４図に示す。前
記実施例と異なる所は、支柱７と荷重点５との間の荷重
の伝達に板バネを介したことである。第３図は要部の斜
視図、第４図は、その断面図を示す。第３図、第４図に
おいて、13は、幅広の板バネであり、中央部で荷重点５
により支えられている。14は板バネホールダであり、支
柱７からの荷重を、幅広の板バネ13の周辺部に印加し、
板バネ13を上に凸に変形せしめている。15は板バネホー
ルダの足であり、支持部８に設けられた孔を貫通してい
る。16は板バネホールダの突起部を示す。Next, another embodiment of the present invention is shown in FIGS. The difference from the above-mentioned embodiment is that a leaf spring is used to transmit the load between the column 7 and the load point 5. FIG. 3 is a perspective view of a main part, and FIG. 4 is a sectional view thereof. In FIGS. 3 and 4, reference numeral 13 denotes a wide leaf spring, which has a load point 5 at the center.
Supported by. 14 is a leaf spring holder, which applies the load from the column 7 to the peripheral portion of the wide leaf spring 13,
The leaf spring 13 is deformed to be convex upward. Reference numeral 15 is a leg of the leaf spring holder, which penetrates a hole provided in the support portion 8. Reference numeral 16 indicates a protrusion of the leaf spring holder.
上記の構成にすることにより、衝撃荷重が、荷重台６に
印加された場合、幅広の板バネ13の強さを適当な大きさ
にしておくことにより、板バネ13が大きく屈曲し、板バ
ネホールダの突起部16が、支持部８と接触することによ
り、ある限界以上の荷重が荷重点５に印加されないこと
になる。静荷重5kg以上で、突起部16と支持部８とが接
触するように幅広の板バネの強さを選択することによ
り、前記の衝撃荷重特性は、５台実施したが、全て100
回以下では破断することがなかった。With the above configuration, when an impact load is applied to the load table 6, by setting the strength of the wide leaf spring 13 to an appropriate size, the leaf spring 13 is largely bent and the leaf spring holder is held. Since the protruding portion 16 contacts the supporting portion 8, a load exceeding a certain limit is not applied to the load point 5. By selecting the strength of the wide leaf spring so that the protrusion 16 and the supporting portion 8 come into contact with each other at a static load of 5 kg or more, the above impact load characteristics were carried out for 5 units, but all were 100%.
It did not break below the number of times.
発明の効果 以上のように本発明の重量検知器によれば、次の効果が
得られる。Effects of the Invention As described above, according to the weight detector of the present invention, the following effects are obtained.
（１） 荷重点とアルミナ・ダイアフラムとの界面に流
動層を形成しているため、荷重点とアルミナ・ダイアフ
ラムとの間の摩擦が減少し、クラックが発生し難くな
り、衝撃荷重に対して破断しにくくなるという効果があ
る。(1) Since a fluidized bed is formed at the interface between the load point and the alumina / diaphragm, friction between the load point and the alumina / diaphragm is reduced, cracks are less likely to occur, and fracture occurs against impact load. There is an effect that it becomes difficult to do.
（２） 荷重台からの荷重を、幅広の板バネを介して荷
重点に印加するようにし、且つ、ある最大荷重以上の荷
重が印加されないような構成であるから、衝撃荷重を多
数回印加しても、破断しないという効果が得られた。(2) Since the load from the load platform is applied to the load point via the wide leaf spring, and the load more than a certain maximum load is not applied, the impact load is applied many times. However, the effect of not breaking was obtained.
第１図は本発明の第１の実施例における重量検知器の断
面図、第２図は同衝撃荷重特性図、第３図、第４図は本
発明の第２の実施例における重量検知器の要部斜視図お
よび要部断面図，第５図は従来の重量検知器の断面図で
ある。 １……電極、２……アルミナ基板（アルミナ・ダイアフ
ラム）、３……アルミナ基板、４……重量センサ素子、
５……荷重点、６……荷重台、７……支柱、８……支持
部、９……カバー、10……流動層、13……板バネ、14…
…板バネホールダ、15……板バネホールダの足、16……
板バネホールダの突起部。FIG. 1 is a sectional view of a weight detector according to the first embodiment of the present invention, FIG. 2 is an impact load characteristic diagram thereof, and FIGS. 3 and 4 are weight detectors according to the second embodiment of the present invention. FIG. 5 is a perspective view of a main part and a cross-sectional view of the main part, and FIG. 5 is a cross-sectional view of a conventional weight detector. 1 ... Electrode, 2 ... Alumina substrate (alumina diaphragm), 3 ... Alumina substrate, 4 ... Weight sensor element,
5 ... Load point, 6 ... Load base, 7 ... Post, 8 ... Support part, 9 ... Cover, 10 ... Fluidized bed, 13 ... Leaf spring, 14 ...
… Leaf spring holder, 15 …… Leaf spring holder legs, 16 ……
Protrusion of leaf spring holder.
Claims (3)
重量センサと、物体を載置する荷重台の重量を受けその
荷重を前記重量センサに付与する荷重点と、前記荷重点
を上下自在に固定するために前記荷重点を貫通する貫通
孔を有するカバーとを備え、前記重量センサと前記荷重
台との間に前記重量センサと前記荷重台との間の摩擦を
減ずる流動層を設けた構成とした重量検知器。1. A capacitance type weight sensor whose capacitance changes according to a load, a load point for receiving the weight of a load platform on which an object is placed and applying the load to the weight sensor, and a load point above and below the load point. A cover having a through hole for freely fixing the load point, and a fluidized bed for reducing friction between the weight sensor and the load base is provided between the weight sensor and the load base. Weight detector with different configuration.
ワックスなどの不揮発性流動体からなる特許請求の範囲
第１項記載の重量検知器。2. The weight detector according to claim 1, wherein the fluidized bed is made of a non-volatile fluid such as grease, silicone oil or silicone wax.
保持し、前記板バネを上に凸に屈曲させるように、前記
荷重台の重量を前記板バネの周辺部に伝達してなる特許
請求の範囲第１項記載の重量検知器。3. A wide leaf spring is horizontally held above the load point, and the weight of the load table is transmitted to the peripheral portion of the leaf spring so that the leaf spring is bent upward. The weight detector according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25286187A JPH0731074B2 (en) | 1987-10-07 | 1987-10-07 | Weight detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25286187A JPH0731074B2 (en) | 1987-10-07 | 1987-10-07 | Weight detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0194222A JPH0194222A (en) | 1989-04-12 |
| JPH0731074B2 true JPH0731074B2 (en) | 1995-04-10 |
Family
ID=17243187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25286187A Expired - Lifetime JPH0731074B2 (en) | 1987-10-07 | 1987-10-07 | Weight detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0731074B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4907050B2 (en) * | 2003-03-31 | 2012-03-28 | 株式会社ワコー | Force detection device |
-
1987
- 1987-10-07 JP JP25286187A patent/JPH0731074B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0194222A (en) | 1989-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101487733B (en) | Electronic weighing scale | |
| JPH04299267A (en) | Capacity type acceleration sensor | |
| JPH0731074B2 (en) | Weight detector | |
| JPH0232565B2 (en) | ||
| JP4285796B2 (en) | Viscous damper and seismic isolation structure using the same | |
| JPS6070276A (en) | Earthquake-proof support apparatus | |
| JPS6146407Y2 (en) | ||
| JPS587307Y2 (en) | Abnormal use prevention device for load cell scales | |
| JP3783423B2 (en) | electronic balance | |
| JPH0122889B2 (en) | ||
| CN218592929U (en) | Detection support for liquid crystal electronic product | |
| CN105973386A (en) | Dual-purpose electronic scale | |
| JP2624315B2 (en) | Semiconductor sensor | |
| JP2594819B2 (en) | Earthquake seismic device | |
| JPH069260Y2 (en) | Seismic isolation device | |
| JPH0439552Y2 (en) | ||
| JPH0452523A (en) | Quake-sensitive device | |
| CN1121584A (en) | Seismosensitive element | |
| JPS637875Y2 (en) | ||
| JPS6197536A (en) | Weigher | |
| CN105973384A (en) | Multifunctional dual-step electronic scale | |
| CN105973358A (en) | Multifunctional dual-step dual-precision electronic scale | |
| JPH0331782Y2 (en) | ||
| JPS5937490A (en) | Supporting structure for reactor vessel | |
| JPH10332472A (en) | Vibration sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080410 Year of fee payment: 13 |