JPH0316610B2 - - Google Patents
Info
- Publication number
- JPH0316610B2 JPH0316610B2 JP2723385A JP2723385A JPH0316610B2 JP H0316610 B2 JPH0316610 B2 JP H0316610B2 JP 2723385 A JP2723385 A JP 2723385A JP 2723385 A JP2723385 A JP 2723385A JP H0316610 B2 JPH0316610 B2 JP H0316610B2
- Authority
- JP
- Japan
- Prior art keywords
- load cell
- proof
- explosion
- container
- pressure
- 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
Links
- 238000005303 weighing Methods 0.000 claims description 12
- 238000004880 explosion Methods 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 3
- 101150006573 PAN1 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Measurement Of Force In General (AREA)
- Details Of Measuring And Other Instruments (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はLPG・石油・塗料・有機溶剤などの
充填・計量などに使用される耐圧防爆型はかりに
関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pressure-resistant explosion-proof scale used for filling and measuring LPG, petroleum, paint, organic solvents, and the like.
従来の技術
危険場所で使用されるこの種のはかりは第８図
に示すように構成されている。１は計量台で、耐
圧防爆型ロードセル２によつて載台３が支持され
ている。４は耐圧防爆型指示計で、前記ロードセ
ル２の出力電圧をデジタル変換して風袋消去した
り、テンキー５からの設定値と比較して定量・定
量前検出する電装ユニツトを内蔵しており、設定
値が第１の表示窓６に表示され、重量値が第２の
表示窓７に表示される。８はロードセル２に付設
された端子箱２ａと指示計４に付設された端子箱
４ａとの間を接続するケーブルで、ロードセル２
への励磁電圧の印加ならびにロードセル２の出力
電圧の指示計４への伝達を実施している。BACKGROUND OF THE INVENTION This type of scale used in hazardous locations is constructed as shown in FIG. Reference numeral 1 denotes a weighing platform, on which a platform 3 is supported by a pressure-resistant and explosion-proof load cell 2 . 4 is a flameproof explosion-proof indicator, which has a built-in electrical unit that digitally converts the output voltage of the load cell 2 to erase the tare weight, and compares it with the set value from the numeric keypad 5 to perform quantitative/pre-quantitative detection. The value is displayed in the first display window 6 and the weight value is displayed in the second display window 7. 8 is a cable connecting between the terminal box 2a attached to the load cell 2 and the terminal box 4a attached to the indicator 4;
The excitation voltage is applied to the load cell 2 and the output voltage of the load cell 2 is transmitted to the indicator 4.
発明が解決しようとする問題点
このように従来の構成ではケーブル８を介して
ロードセル２と指示計４とを接続しているため、
ケーブル８が危険場所で露出しないように耐圧防
爆配管を施工することが要求される。又、ロード
セル及び指示計共、各々耐圧防爆端子箱２ａ，４
ａを設けなければならない為、煩雑であり、コス
ト高となつている。Problems to be Solved by the Invention As described above, in the conventional configuration, the load cell 2 and the indicator 4 are connected via the cable 8.
It is required to construct pressure-resistant and explosion-proof piping so that the cable 8 is not exposed in a hazardous location. In addition, both the load cell and the indicator are installed in flameproof explosion-proof terminal boxes 2a and 4, respectively.
A must be provided, which is complicated and increases costs.
本発明は耐圧防爆配管せずともロードセルと指
示計の電装ユニツト等とを接続できる安価な耐圧
防爆型はかりを提供しようとするものである。 The present invention aims to provide an inexpensive explosion-proof scale capable of connecting a load cell and an electrical unit of an indicator without the need for pressure-proof explosion-proof piping.
問題点を解決するための手段
本発明の耐圧防爆型はかりは、ロードセルとこ
のロードセルからの計量信号を表示する指示計部
とを単一の耐圧容器に収容すると共に、ロードセ
ル可動部と前記容器との間に耐圧防爆に必要な幅
と奥行を有する間隙を形成して前記容器の外部に
ロードセル可動部を露出させたことを特徴とす
る。Means for Solving the Problems The pressure-resistant explosion-proof scale of the present invention accommodates a load cell and an indicator section that displays a weighing signal from the load cell in a single pressure-resistant container, and also accommodates a load cell movable section and the container. The load cell movable part is exposed to the outside of the container by forming a gap having a width and depth necessary for pressure-proofing and explosion-proofing.
作 用
この構成により、ロードセルと指示計部とを単
一の耐圧容器に収容したため、危険場所に露出さ
せずとも両者を接続でき、従来のような耐圧防爆
配管を必要としない。しかも容器内にロードセル
を収容したにもかかわらず、ロードセルの可動部
と前記容器との間に耐圧防爆を満足する間隙を形
成してロードセル可動部を露出させたため、容器
外部からロードセルに荷重を負荷することができ
る。Function: With this configuration, the load cell and the indicator are housed in a single pressure-resistant container, so they can be connected without exposing them to a hazardous area, and there is no need for pressure-resistant and explosion-proof piping like in the past. Moreover, even though the load cell was housed in the container, a gap was formed between the movable part of the load cell and the container that satisfied explosion-proof conditions, exposing the movable part of the load cell, so a load was applied to the load cell from outside the container. can do.
実施例
以下、本発明の実施例を第１図〜第７図に基づ
いて説明する。Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 7.
第１図〜第３図は本発明の第１の実施例を示
す。９はロードセル２と指示計用電装ユニツト１
０を収容する単一の耐圧容器で、ロードセル２の
一端Ａはボルト１０によつて容器９に取付けら
れ、他端Ｂは容器９の外部に露出している。１１
はストレインゲージ、１２はロードセル２の前記
他端Ｂにボルト１３によつて取付けられた対向部
材で、前記容器９の一部で前記ロードセル２の周
囲を取りまく筒状部１４の端面１５と幅Ｗ隔てて
対向している。１６は対向部材１２にボルト１７
止めされた計量皿である。１８は耐圧防爆形の表
示窓で、容器９の内部に配設された表示窓〔図示
せず〕が容器９の外部から臨めるよう設けられて
いる。なお、商用電源などは容器９の端子箱部１
９を介して行われ、端子箱部１９からのケーブル
には従来と同じように耐圧防爆配管が施工されて
いる。 1 to 3 show a first embodiment of the present invention. 9 is load cell 2 and indicator electrical unit 1
One end A of the load cell 2 is attached to the container 9 with a bolt 10, and the other end B is exposed to the outside of the container 9. 11
is a strain gauge; 12 is an opposing member attached to the other end B of the load cell 2 with a bolt 13; They are facing across from each other. 16 is a bolt 17 attached to the opposing member 12.
It is a stopped weighing pan. Reference numeral 18 denotes a pressure-resistant and explosion-proof display window, which is provided so that a display window (not shown) disposed inside the container 9 can be viewed from the outside of the container 9. In addition, the commercial power supply etc. is connected to the terminal box part 1 of the container 9.
9, and the cable from the terminal box section 19 is provided with pressure-resistant and explosion-proof piping as in the past.
また、ここで対向部材１２と筒状部１４の端面
１５との間に形成される間隙２０の幅：Ｗと奥行
Ｌは、容器９の内部で発生した爆発が容器９の外
部に波及しないよう、爆発等級そ容器９の中間部
雰囲気２１の容積に基づいて次の基準に照して設
定されている。この基準は産業安全研究所技術指
針〔産業安全研究所報告、RILS−TR−79−１
昭和54年11月15日、労働省産業安全研究所著〕の
「3231接合面」であつて、このようにW.Lを設定
すると、万一、中間部雰囲気２１で爆発が発生し
ても火災逸走することがなく防爆できる。 In addition, the width: W and depth L of the gap 20 formed between the facing member 12 and the end surface 15 of the cylindrical portion 14 are set so that the explosion occurring inside the container 9 does not spread to the outside of the container 9. , the explosion grade is set based on the volume of the middle atmosphere 21 of the container 9 and in accordance with the following criteria. This standard is based on the Technical Guidelines of the Institute of Industrial Safety [Report of the Institute of Industrial Safety, RILS-TR-79-1
3231 Joint Surface, written by the Industrial Safety Research Institute of the Ministry of Labor, November 15, 1971. If the WL is set in this way, even if an explosion occurs in the middle atmosphere 21, the fire will escape. Explosion-proof without any problems.
このように、ロードセル２と電装ユニツト１０
とを容器９内で接続できるため、従来のものに比
べて耐圧防爆配管の個所を少なくできる。また、
間隙２０を設けたことによつて耐圧防爆機能を損
わずにロードセル２の可動部に直接に荷重を負荷
できるため、容器９内にロードセル２を収容した
ことによる感度低下は見られない。 In this way, the load cell 2 and the electrical unit 10
Since these can be connected within the container 9, the number of pressure-resistant and explosion-proof piping can be reduced compared to conventional ones. Also,
By providing the gap 20, it is possible to directly apply a load to the movable part of the load cell 2 without impairing the pressure-proof and explosion-proof function, so no deterioration in sensitivity due to housing the load cell 2 in the container 9 is observed.
上記第１の実施例では対向部材１２に計量皿１
６を直接に取付けたが、これは第４図に示すよう
に計量台部２２の槓杆２３に連結しても同様であ
り、この場合、容器９は縦筒２４上に取付けられ
る。第５図は第４図の要部を示し、２５は連結
棒、２６は連結環である。 In the first embodiment, the weighing pan 1 is mounted on the opposing member 12.
6 is directly attached, but the same can be done by connecting it to the lever 23 of the weighing platform section 22 as shown in FIG. 4. In this case, the container 9 is attached on the vertical tube 24. FIG. 5 shows the main parts of FIG. 4, in which 25 is a connecting rod and 26 is a connecting ring.
上記第１、第２の実施例では、容器９の一部で
ある筒状部１４の端面１５と前記対向部材１２と
が間隙２０で対向していたが、これは第６図に示
すように筒状部１４に穿設された貫通孔２７を通
してロードセル２の可動部を容器９の外部に露出
させても同様である。この場合にも間隙２０は幅
Ｗと奥行Ｌが耐圧防爆を満足するよう設定されて
いる。 In the first and second embodiments, the end surface 15 of the cylindrical portion 14, which is a part of the container 9, and the opposing member 12 were opposed to each other with a gap 20, as shown in FIG. The same thing can be done even if the movable part of the load cell 2 is exposed to the outside of the container 9 through the through hole 27 formed in the cylindrical part 14. In this case as well, the width W and depth L of the gap 20 are set so as to satisfy pressure-proof and explosion-proof conditions.
第７図は第４の実施例を示す。第６図に示す第
３の実施例ではベンデイング型ロードセルの場合
であつたが、これは第７図のように圧縮型ロード
セルにも適用できる。この場合には筒状部１４の
外周面２８と対向部材１２との間に間隙２０を形
成して耐圧防爆を満足している。 FIG. 7 shows a fourth embodiment. Although the third embodiment shown in FIG. 6 is a case of a bending type load cell, it can also be applied to a compression type load cell as shown in FIG. In this case, a gap 20 is formed between the outer circumferential surface 28 of the cylindrical portion 14 and the facing member 12, thereby satisfying pressure-proof and explosion-proof conditions.
発明の効果
以上説明のように本発明の耐圧防爆型はかり
は、ロードセルとこのロードセルからの計量信号
を表示する指示計部とを単一の耐圧容器に収容し
たため、耐圧防爆配管の施工を減少させることが
でき、安価な防爆型はかりが製作できる。Effects of the Invention As explained above, the pressure-resistant explosion-proof scale of the present invention houses the load cell and the indicator section that displays the weighing signal from the load cell in a single pressure-resistant container, which reduces the need for construction of pressure-resistant explosion-proof piping. It is possible to manufacture inexpensive explosion-proof scales.
また、ロードセル可動部と前記容器との間に耐
圧防爆に必要な幅と奥行を有する間隙を形成して
前記容器の外部にロードセル可動部を露出させた
ため、耐圧防爆を損うことなく、ロードセルに直
接に荷重を負荷することが出来、小秤量でもこれ
を正確に測定できるものである。 In addition, since a gap having the width and depth necessary for pressure-proof explosion-proofing is formed between the load cell movable part and the container, and the load cell movable part is exposed to the outside of the container, the load cell can be used without impairing the pressure-proof explosion-proof property. It is possible to directly apply a load and accurately measure it even with a small weighing amount.
第１図は本発明の第１の実施例の縦断面図、第
２図は第１図のＸ−Ｘ矢視図、第３図は第１図の
Ｙ−Ｙ矢視図、第４図は第２の実施例の一部切欠
き正面図、第５図は第４図の要部拡大断面図、第
６図は第３の実施例の要部断面図、第７図は第４
の実施例の要部断面図、第８図は従来例の説明図
である。
２……ロードセル、９……容器、１０……電装
ユニツト、１２……対向部材、１４……筒状部、
１６……計量皿、１８……表示窓、２０……間
隙、２２……計量台部、２３……槓杆、２５……
連結棒、２７……貫通孔。
FIG. 1 is a longitudinal cross-sectional view of the first embodiment of the present invention, FIG. 2 is a view along the X-X arrow in FIG. 1, FIG. 3 is a view along the Y-Y arrow in FIG. 1, and FIG. is a partially cutaway front view of the second embodiment, FIG. 5 is an enlarged sectional view of the main part of FIG. 4, FIG. 6 is a sectional view of the main part of the third embodiment, and FIG.
FIG. 8 is an explanatory diagram of a conventional example. 2... Load cell, 9... Container, 10... Electrical unit, 12... Opposing member, 14... Cylindrical part,
16...Weighing pan, 18...Display window, 20...Gap, 22...Weighing platform section, 23...Role, 25...
Connecting rod, 27...through hole.
Claims (1)
を表示する指示計部とを単一の耐圧容器に収容す
ると共に、ロードセル可動部と前記容器との間に
耐圧防爆に必要な幅と奥行を有する間隙を形成し
て前記容器の外部にロードセル可動部を露出させ
た耐圧防爆型はかり。 ２ ロードセル可動部に直接に計量皿を接続した
ことを特徴とする特許請求の範囲第１項記載の耐
圧防爆型はかり。 ３ ロードセル可動部を計量台部の槓杆に連結し
たことを特徴とする特許請求の範囲第１項記載の
耐圧防爆型はかり。[Claims] 1. A load cell and an indicator section that displays a weighing signal from the load cell are housed in a single pressure-resistant container, and a width necessary for pressure-proof explosion-proofing is provided between the load cell movable section and the container. A pressure-resistant explosion-proof scale having a load cell movable part exposed to the outside of the container by forming a gap having a depth of . 2. A pressure-resistant explosion-proof scale according to claim 1, characterized in that a weighing pan is directly connected to the movable part of the load cell. 3. The pressure-resistant explosion-proof scale according to claim 1, wherein the load cell movable part is connected to the lever of the weighing platform part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2723385A JPS61186821A (en) | 1985-02-13 | 1985-02-13 | Explosion-proof scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2723385A JPS61186821A (en) | 1985-02-13 | 1985-02-13 | Explosion-proof scale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61186821A JPS61186821A (en) | 1986-08-20 |
| JPH0316610B2 true JPH0316610B2 (en) | 1991-03-06 |
Family
ID=12215352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2723385A Granted JPS61186821A (en) | 1985-02-13 | 1985-02-13 | Explosion-proof scale |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61186821A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10025712C2 (en) | 2000-05-25 | 2003-11-13 | Mettler Toledo Gmbh | Balance with overpressure housing |
| EP1938058B1 (en) | 2005-10-12 | 2016-04-20 | Wipotec Wiege- und Positioniersysteme GmbH | Weighing cell with a receiving holder |
| JP5437122B2 (en) * | 2010-03-15 | 2014-03-12 | 株式会社イシダ | Combination weighing device |
| JP5421864B2 (en) * | 2010-06-29 | 2014-02-19 | 新光電子株式会社 | Explosion-proof scale |
-
1985
- 1985-02-13 JP JP2723385A patent/JPS61186821A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61186821A (en) | 1986-08-20 |
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