JPH053956U - Structure of cylindrical load cell body - Google Patents
Structure of cylindrical load cell bodyInfo
- Publication number
- JPH053956U JPH053956U JP079391U JP7939191U JPH053956U JP H053956 U JPH053956 U JP H053956U JP 079391 U JP079391 U JP 079391U JP 7939191 U JP7939191 U JP 7939191U JP H053956 U JPH053956 U JP H053956U
- Authority
- JP
- Japan
- Prior art keywords
- load
- load cell
- cylindrical
- cell body
- parallel
- 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.)
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- Measurement Of Force In General (AREA)
Abstract
(57)【要約】
【目的】 円柱状の外装ケースに収納し易く、低荷重レ
ンジの測定に適したロードセル本体を作る。
【構成】 ロードセル本体10は円柱状素材から、上段
部と下段部に分けて加工する。固定部17と荷重受18
は溝16を挟んで対面した状態で共に上段部に作られ
る。比較的長い寸法の取れた並行ビーム14、15が洞
穴11を囲んで下段側に作られるから、撓み易く、低荷
重レンジを精度よく測れる。勿論円柱状の外装ケースに
納め易い。
(57) [Summary] [Purpose] A load cell body that is easy to store in a cylindrical outer case and suitable for low load range measurements is made. [Structure] The load cell main body 10 is made of a cylindrical material and is divided into an upper portion and a lower portion. Fixed part 17 and load receiver 18
Are formed in the upper step portion while facing each other with the groove 16 sandwiched therebetween. Since the parallel beams 14 and 15 having a relatively long dimension are formed on the lower side so as to surround the cave 11, they are easily bent and the low load range can be accurately measured. Of course, it is easy to fit in a cylindrical outer case.
Description
【0001】[0001]
本考案は、低荷重レンジタイプで、円柱形状の外装ケースに収納するのに適し た、円柱型ロードセル本体の構造に関する。 The present invention relates to a structure of a cylindrical load cell body which is a low load range type and suitable for being housed in a cylindrical outer case.
【0002】[0002]
普通、ロードセルはその取付場所の関係から、或は商品的価値の関係から、外 観的に円柱形状をしたものが多いが、内部に収納されているロードセル本体につ いては、全体が矩形状のものや、放射状ビームを有する円柱形状のものが用いら れていた。 Usually, many load cells have an externally cylindrical shape because of their installation location or commercial value, but the entire load cell body housed inside has a rectangular shape. The one used was a cylindrical one with a radial beam.
【0003】[0003]
しかし、矩形状のものは、言う迄もなく、これを円柱形状の外装ケースに納め ようとすると、どうしても外形が大きくなり、又放射状ビームを有する円柱形状 のものは、収納し易く偏荷重には強いが、中心を荷重受とし、円周縁を固定部と しているので、各放射ビームが半径よりかなり短くなり、この結果ビームが強く て低荷重には不向きで、これを低荷重用に改良しようとして放射状ビームを薄く すると、そこに貼着される歪ゲージの発熱等が悪影響して、精度が上げられない 難点があった。 However, needless to say, the rectangular shape will have a large outer shape when it is to be stored in a cylindrical outer case, and the cylindrical shape having a radial beam is easy to store and is not subject to unbalanced load. Although strong, the center of the beam is used as the load receiver and the circumference of the beam is used as the fixed part, so each radiation beam is considerably shorter than the radius, and as a result, the beam is strong and not suitable for low loads. If the radial beam is thinned in an attempt to do so, the heat generated by the strain gauge attached to the beam will be adversely affected and the accuracy cannot be improved.
【0004】[0004]
それ故、ロードセル本体10の外観を円柱形状とし、この円柱形状の下段部1 0Bには、その円盤内で出来るだけ長いビームが取れるように、複合並行ビーム 14、15を形成し、上段部10Aには、この並行ビーム14、15のそれぞれ 一端と結合した固定部17と、中心以上に伸びた荷重受18とを形成した。 Therefore, the external appearance of the load cell body 10 is cylindrical, and the parallel lower beams 10 and 15 are formed on the lower step portion 10B of the column shape so that the longest possible beam can be taken in the disc. A fixed portion 17 connected to one end of each of the parallel beams 14 and 15 and a load receiver 18 extending beyond the center are formed on the inner surface of the base.
【0005】[0005]
円柱状素材の下段部10Bの全体を使って、並行ビーム14、15を形成して あるから、並行ビーム14、15を長く製作することができ、ビームの厚さを薄 くしないでも、低荷重レンジの測定が精度よく行なわれる。又着力点であるネジ 孔18aに対し、複合した並行ビーム14、15が対称となっているから偏荷重 に強く、更に全体も円柱状であるから円柱形状の外装ケースに収納し易い。 Since the parallel beams 14 and 15 are formed by using the entire lower part 10B of the cylindrical material, the parallel beams 14 and 15 can be manufactured for a long time, and even if the beam thickness is not reduced, a low load can be obtained. The range is measured accurately. Further, since the combined parallel beams 14 and 15 are symmetrical with respect to the screw hole 18a, which is the point of attachment, the load is strong against an unbalanced load, and since the whole is columnar, it can be easily housed in a columnar outer case.
【0006】[0006]
以下、本考案を図面を参照して説明する。図中、10はロードセル本体で、円 柱形状をした素材を、下面側から厚さの約半分超の深さまで、各辺がそれぞれL とMである略長方形の洞穴11(第2、3図)を穿ち、又上面側からも厚さの約 半分まで、幅が一方辺Lより狭く、他方辺Mに平行で、Mより長い中央路を残し て、一対の角柱凹部12、13を削り取り、更に一部の外周面を他方辺Mに平行 な面でに切削(側面14a、15aを形成)して、角形状の並行ビーム14、1 5が複合形成された下段部10Bを構成する。なお、角柱凹部12、13の長さ は外周面まで達しても構わない。 Hereinafter, the present invention will be described with reference to the drawings. In the figure, 10 is a load cell body, which is made of a cylindrical material and has a substantially rectangular cave 11 (Figs. 2 and 3) having L and M on each side from the lower surface side to a depth of more than about half the thickness. ), And from the upper surface side up to about half of the thickness, the pair of prismatic recesses 12 and 13 are scraped off, leaving a central path whose width is narrower than one side L, parallel to the other side M, and longer than M. Further, a part of the outer peripheral surface is cut by a surface parallel to the other side M (side surfaces 14a and 15a are formed) to form the lower step portion 10B in which the rectangular parallel beams 14 and 15 are combined. The lengths of the prismatic recesses 12 and 13 may reach the outer peripheral surface.
【0007】 次に、中央に位置している角柱状の中央路に、中心(ネジ孔18a)よりやや 左方位置で溝16を切削することにより、固定部17と荷重受18とが分離形成 された上段部10Aを構成する。このため、全体的形状としては、下段部10B には洞穴11を囲んで並行ビームI4、15が、上段部10Aには溝16を境に して固定部17と荷重受18とが対面している。Next, the fixing portion 17 and the load receiver 18 are separately formed by cutting the groove 16 at a position slightly left of the center (screw hole 18a) in the prismatic central path located at the center. The upper part 10A is formed. Therefore, as a general shape, the parallel beams I4, 15 surround the cave 11 in the lower step portion 10B, and the fixed portion 17 and the load receiver 18 face each other across the groove 16 in the upper step portion 10A. There is.
【0008】 ここで、符号14a−1、15a−1(第1、2図)は側面14a、15aに 設けられた連結円状の貫通孔で、荷重受18に加えられた外力(負荷)に対する 応力を、ここに集中させるために設けられる。17a、17b(第3図)は固定 部17に設けられた貫通孔で、ロードセル本体10を基台(図示せず)に固定す るための固定ボルトを通す孔である。18a(第1図)はネジ孔で、円柱状素材 の中心位置となるように荷重受18の先端部に設けられており、図示しないが、 負荷棒がここに連結されて、外力(負荷)を受けるようになっている。19(a 〜d)、20(a〜d)は並行ビーム14、15のそれぞれ上下面に貼着された 歪ゲージで、検出された抵抗変化は図示しないリード線により外部に導かれ、公 知の電気回路により検出される。Here, reference numerals 14a-1 and 15a-1 (FIGS. 1 and 2) are connecting circular through holes provided on the side surfaces 14a and 15a, respectively, for an external force (load) applied to the load receiver 18. It is provided to concentrate the stress here. Reference numerals 17a and 17b (FIG. 3) are through holes provided in the fixing portion 17, through which fixing bolts for fixing the load cell body 10 to a base (not shown) are inserted. Reference numeral 18a (Fig. 1) is a screw hole, which is provided at the tip of the load receiver 18 so as to be at the center position of the cylindrical material. Although not shown, a load rod is connected here to allow external force (load). I am supposed to receive it. Numerals 19 (a to d) and 20 (a to d) are strain gauges attached to the upper and lower surfaces of the parallel beams 14 and 15, respectively, and the detected resistance change is guided to the outside by a lead wire (not shown). Detected by the electric circuit of.
【0009】 今、測定に際して、荷重受18のネジ孔18aの位置に外力(負荷)が加えら れると、これに応じて、比較的長く作られた受感部である並列ビーム14、15 は低荷重でも比較的大きく撓んで、そこに貼着された歪ゲージ19、20の抵抗 を変化させるから、この変化をよく知られたブリッジ回路で検出すれば、外力( 負荷)を知ることができる。At the time of measurement, when an external force (load) is applied to the position of the screw hole 18a of the load receiver 18, the parallel beams 14 and 15 which are relatively long-sensing parts are correspondingly generated. Since the resistance of the strain gauges 19 and 20 attached thereto is changed relatively even under a low load, the external force (load) can be known by detecting this change with a well-known bridge circuit. ..
【0010】 この時、仮に外力に偏向した力が混在していても、着力点(ネジ孔18a)を 中心として対称的に並行ビーム14、15が並んでおり、又歪ゲージ19、20 の各素子も着力点対称となっているから、この関係をブリッジ回路の対辺に適用 すれば、偏荷重の影響を除去することができる。At this time, even if the force deflected to the external force is mixed, the parallel beams 14 and 15 are symmetrically arranged around the force application point (screw hole 18a), and the strain gauges 19 and 20 are respectively arranged. Since the element is also symmetrical with respect to the force applied, if this relationship is applied to the opposite side of the bridge circuit, the effect of unbalanced load can be eliminated.
【0011】 又言う迄もなく、ロードセル本体10は円柱状であるから、これを円柱形状の 外装ケースに入れて製品とすることは容易であり、容器が密封型の場合には、下 段部10Bに洞穴11が形成されているので、この部分に密封内部の気圧変動を 補正するためのベローズを設置することも可能である。Needless to say, since the load cell body 10 has a columnar shape, it is easy to put it in a columnar outer case to make a product. Since the cave 11 is formed in 10B, it is possible to install a bellows in this portion to correct the pressure fluctuation inside the seal.
【0012】 なお、上述では、円柱形状の上段部10A、下段部10Bの厚さ(深さ)が同 等程度として図示したが、固定部17、荷重受18の強度は、自己撓み(固定部 の取付け不安定による撓みを含む)が無い強さであれば十分であるから、必ずし も同じ厚さにする必要はない。又側面14a、15aの切削は並行ビーム14、 15の曲げ量を計算するのに便利ではあるが、必ずしも必要なものではない。In the above description, the cylindrical upper and lower steps 10A and 10B are shown as having the same thickness (depth), but the strength of the fixing portion 17 and the load receiver 18 is self-deflecting (fixing portion). It is not necessary to have the same thickness, as long as there is no strength (including bending due to instability in mounting), it is sufficient. The cutting of the side surfaces 14a and 15a is convenient for calculating the bending amount of the parallel beams 14 and 15, but is not always necessary.
【0013】[0013]
このように、本考案では、ロードセルを円柱形状とし、これを上段部と下段部 に分け、下段部に比較的長い並行ビームを設置することができたから、低荷重レ ンジの測定に適し、円柱形状の容器にも収納し易い。 As described above, in the present invention, the load cell is formed into a cylindrical shape, which can be divided into the upper part and the lower part, and a relatively long parallel beam can be installed in the lower part, which is suitable for measuring a low load range. Easy to store in a shaped container.
【図1】本考案の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図2】同実施例を裏側から見た斜視図である。FIG. 2 is a perspective view of the same embodiment as viewed from the back side.
【図3】同実施の平面図である。FIG. 3 is a plan view of the same embodiment.
10 ロードセル本体 10A 上段部 10B 下段部 11 洞穴 12 角柱凹部 13 角柱凹部 14 並行ビーム 15 並行ビーム 16 溝 17 固定部 18 荷重受 18a ネジ孔 19(a〜d) 歪ゲージ 20(a〜d) 歪ゲージ L 一方辺 M 他方辺 10 Load Cell Main Body 10A Upper Stage 10B Lower Stage 11 Cave 12 Square Cylinder 13 Square Cylinder 14 Parallel Beam 15 Parallel Beam 15 Parallel Beam 16 Groove 17 Fixing Part 18 Load Bearing 18a Screw Hole 19 (a-d) Strain Gauge 20 (a-d) Strain Gauge L one side M the other side
Claims (1)
からなる略長方形の洞穴11を、下端部10Bを僅かに
越える深さに穿ち、上面側からは一方辺Lより狭い幅で
他方辺Mと平行な中央路(16、17、18)を上段部
10Aの深さに残して、他方辺Mより長い角柱凹部1
2、13を上段部10Aから削り取り、前記中央路(1
6、17、18)に中心より左方位置で溝16を切削す
ることにより、左方に固定部17、右方に荷重受18を
分離形成した形状を有し、全体的構成が下段部10Bに
並行ビーム14、15が、上段部10Aに固定部17、
荷重受18が設けられたことを特徴とする円柱型ロード
セル本体の構造。[Claims for utility model registration] [Claim 1] From the bottom surface side of the cylindrical material, the sides are L and M
A substantially rectangular cave 11 made of is drilled to a depth slightly exceeding the lower end portion 10B, and a central path (16, 17, 18) narrower than one side L and parallel to the other side M from the upper surface side is formed in the upper step portion. A prismatic recess 1 longer than the other side M, leaving a depth of 10 A
Scraping Nos. 2 and 13 from the upper step 10A, the central road (1
6, 17, 18) has a shape in which a fixed portion 17 is separated on the left side and a load receiver 18 is formed on the right side by cutting the groove 16 at a position leftward from the center, and the overall configuration is the lower step portion 10B. The parallel beams 14 and 15 are attached to the upper portion 10A with the fixed portion 17,
A structure of a cylindrical load cell body, characterized in that a load receiver 18 is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7939191U JPH0743626Y2 (en) | 1991-06-28 | 1991-06-28 | Structure of the cylindrical load cell body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7939191U JPH0743626Y2 (en) | 1991-06-28 | 1991-06-28 | Structure of the cylindrical load cell body |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH053956U true JPH053956U (en) | 1993-01-22 |
JPH0743626Y2 JPH0743626Y2 (en) | 1995-10-09 |
Family
ID=13688568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7939191U Expired - Lifetime JPH0743626Y2 (en) | 1991-06-28 | 1991-06-28 | Structure of the cylindrical load cell body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0743626Y2 (en) |
-
1991
- 1991-06-28 JP JP7939191U patent/JPH0743626Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0743626Y2 (en) | 1995-10-09 |
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