JPH0632581Y2 - Pin-supported load cell - Google Patents
Pin-supported load cellInfo
- Publication number
- JPH0632581Y2 JPH0632581Y2 JP3969788U JP3969788U JPH0632581Y2 JP H0632581 Y2 JPH0632581 Y2 JP H0632581Y2 JP 3969788 U JP3969788 U JP 3969788U JP 3969788 U JP3969788 U JP 3969788U JP H0632581 Y2 JPH0632581 Y2 JP H0632581Y2
- Authority
- JP
- Japan
- Prior art keywords
- pin
- flexure element
- strain
- load cell
- support
- 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
- 238000003780 insertion Methods 0.000 description 17
- 230000037431 insertion Effects 0.000 description 17
- 238000005452 bending Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Measurement Of Force In General (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はロードセルに係り、特にトラック等の大重量物
の重量を測定するロードセルであって、支持部材に対す
る起歪体の着脱を容易に行えるよう改良を加えたロード
セルの構造に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a load cell, and more particularly to a load cell for measuring the weight of a large heavy object such as a truck, in which a strain element can be easily attached to and detached from a support member The present invention relates to a load cell structure improved.
第８図はトラックスケールと通称される重量測定装置で
あって、トラック５０を載置台５１に移動させ、この載
置台５１の下に複数個配置したロードセル５２によりこ
のトラックの重量（荷物を載せている場合にはその荷物
ごとの重量）を測定する。各ロードセル５２に対して加
わる荷重は１０トン若しくはそれ以上となるためロード
セル自体も頑丈に構成する必要がある。然し、ロードセ
ルの頑丈さと精度とは表裏の関係にあり、頑丈でかつ精
度の高いロードセルを提供するのはなかなか困難であ
る。従来はロードセル本体を構成する起歪体をボルト等
強固な固定手段で支持固定することにより大きな強度を
持たせていたが、起歪体に加わった被測定物の荷重がこ
の起歪体支持部材側に対して曲げ応力として伝達される
等により、高い測定精度を機体することはできなかっ
た。FIG. 8 shows a weight measuring device commonly referred to as a truck scale, in which the truck 50 is moved to a mounting table 51, and a plurality of load cells 52 arranged under the mounting table 51 are used to load the weight of the truck (loading a load). If so, weigh each baggage). Since the load applied to each load cell 52 is 10 tons or more, the load cell itself must be constructed to be sturdy. However, since the toughness and the accuracy of the load cell are on the opposite sides, it is difficult to provide a tough and highly accurate load cell. Conventionally, the strain element constituting the load cell main body is supported and fixed by a strong fixing means such as a bolt to give a large strength, but the load of the measured object applied to the strain element is the strain element support member. It was not possible to achieve high measurement accuracy due to transmission as bending stress to the side.
第６図及び第７図は以上の点を考慮して考案者等が別途
提案中の大重量物用ロードセルを示す。FIG. 6 and FIG. 7 show a load cell for a heavy load, which the inventors have proposed separately in consideration of the above points.
この構成では起歪体１はその両端部を挿通しているピン
３により支持されている。荷重伝達軸７を介して起歪体
１に加わった荷重により起歪体は変形するが、この場
合、ピン３による支持構造となっているため起歪体１と
ピン３とは相対的に回動する。これにより起歪体１に加
わった荷重による曲げ応力が他の部材に伝達されること
はなく、その荷重は起歪体の変形に対してのみ消費され
る。従ってこのピン支持構造のロードセルでは正確な荷
重の測定が行われる。なお起歪体１の変形は起歪体１に
設けたストレインゲージ２において電気量に変換されて
出力される。In this structure, the flexure element 1 is supported by the pins 3 inserted through both ends thereof. The strain element is deformed by the load applied to the strain element 1 via the load transmission shaft 7, but in this case, the strain element 1 and the pin 3 rotate relatively because of the support structure of the pin 3. Move. Thereby, the bending stress due to the load applied to the flexure element 1 is not transmitted to other members, and the load is consumed only for the deformation of the flexure element 1. Therefore, the load cell having the pin supporting structure can accurately measure the load. The deformation of the flexure element 1 is converted into an electric quantity by the strain gauge 2 provided in the flexure element 1 and output.
ここで、起歪体１自体は長期間の使用による劣化、錆の
発生、許容値以上の荷重による割れの発生等により交換
する必要が生じる。この場合ボルト等の固定手段で取り
付けてある場合には起歪体の交換には大きな労力を必要
とする。この点、第６図に示すピン支持構造のロードセ
ルの場合にはピン３に取りつけた固定ピン８を引き抜
き、続いてピン３を引き抜くことにより、ボルト固定式
の構造に比較すると比較的容易に起歪体を交換すること
ができる。しかし起歪体自体が大重量物であり、交換時
にはやはりかなりの労力を必要とすることは否めない。Here, the flexure element 1 itself needs to be replaced due to deterioration due to long-term use, occurrence of rust, cracking due to a load exceeding an allowable value, and the like. In this case, if it is attached by a fixing means such as a bolt, a great deal of labor is required to replace the strain element. In this respect, in the case of the load cell having the pin support structure shown in FIG. 6, the fixing pin 8 attached to the pin 3 is pulled out, and then the pin 3 is pulled out, so that it is relatively easy to perform as compared with the bolt fixing type structure. The strain body can be replaced. However, it is undeniable that the flexure element itself is a heavy object and requires considerable effort when replacing it.
本考案は上記別途提案中の技術に更に改良を加えて、起
歪体の交換をより容易に行えるように構成したものであ
る。The present invention is configured by further improving the above separately proposed technique so that the flexure element can be replaced more easily.
起歪体に挿通したピンを支持する２対の支持体各対に対
して、起歪体と対向する面に各々段状部を設け、かつ対
向する支持体の段状部間の距離を起歪体支持用のピンの
全長とほぼ等しくするようにし、起歪体に挿通したピン
をこの一対の段状部で支持するよう構成する。For each of the two pairs of support members that support the pin inserted in the strain-generating body, a step is provided on the surface facing the strain-generating body, and the distance between the step-like portions of the opposing supports is set. The length of the pin for supporting the strain body is made substantially equal to that of the pin, and the pin inserted into the strain body is supported by the pair of stepped portions.
起歪体に挿通した各ピンの両端は対向する各対の支持体
の段状部に係止され、起歪体及びこれに加えられる被測
定物の荷重を支持すると共に、この段状部によりピンの
軸心方向への移動を規制し、ピンが起歪体から抜け落ち
るのを防止する。Both ends of each pin inserted into the strain-flexing body are locked to the stepped portions of the pair of opposing support members to support the load of the strain-flexing element and the object to be measured applied thereto, and by this stepped portion. It regulates the movement of the pin in the axial direction and prevents the pin from falling out of the strain body.
以下本考案の実施例を図面を参考に具体的に説明する。 Embodiments of the present invention will be specifically described below with reference to the drawings.
第１図及び第２図において、５は後述する起歪体支持用
のピン３を支持する支持体であり、起歪体１の両端に各
々挿通した２本のピンを支持するため２対の支持体が基
台６に立設固定してある。１０はこの支持体５に形成し
たピン挿通孔であり、ピン３の挿通が可能な程度にこの
ピン３の外径とほぼ等しい内径に形成してある。１１は
起歪体１と対向する側の面に対して開口し、かつピン挿
通孔１０とほぼ中心を等しくする大径部でありピン挿通
孔１０に対して拡大した部分が段状部１１となってい
る。他方の対向する支持体５に対してもピン挿通孔１０
と段状部１１が形成され、かつ対向する一対の支持体で
は、この段状部１１が起歪体１を介して対向位置するよ
うに構成してある。次に起歪体１に挿通するピン３の全
長はこの対向する段状部間の距離Ｗとほぼ等しくしてお
く。このように構成した２対の支持体５を基台６の所定
の位置に固定する。In FIG. 1 and FIG. 2, reference numeral 5 denotes a support body that supports a pin 3 for supporting a strain-generating body, which will be described later, and two pairs of pins are provided to support the two pins inserted at both ends of the strain-generating body 1. The support is vertically fixed to the base 6. Reference numeral 10 denotes a pin insertion hole formed in the support body 5, which has an inner diameter substantially equal to the outer diameter of the pin 3 so that the pin 3 can be inserted. Reference numeral 11 denotes a large-diameter portion that is open to the surface on the side facing the flexure element 1 and has a center substantially equal to that of the pin insertion hole 10. The enlarged portion with respect to the pin insertion hole 10 is a stepped portion 11. Has become. The pin insertion hole 10 is also formed in the other opposing support body 5.
The stepped portion 11 is formed, and in the pair of support members facing each other, the stepped portion 11 is arranged so as to face each other via the flexure element 1. Next, the total length of the pin 3 inserted into the flexure element 1 is set to be substantially equal to the distance W between the facing step portions. The two pairs of support bodies 5 thus configured are fixed to the base 6 at predetermined positions.
以上の構成において起歪体１と交換する場合には、先ず
起歪体１を持ち上げ、起歪体１のピン挿通孔４と支持体
５のピン挿通孔１０とがほぼ等しい位置となるようにな
る。この状態でピン３を支持体５のピン挿通孔１０を介
して引き抜く。起歪体１の両端のピン３を引き抜くこと
により起歪体は取り出し可能となるので、この起歪体１
を取り出し新たな起歪体と交換する。続いて新たな起歪
体１に対して支持体５のピン挿通孔１０を介してピン３
を挿通しその先端が対向する側の支持体の段状部に達し
たならば起歪体１を静かに下降させる。ピン３の全長は
段状部間の距離Ｗにほぼ等しいので、起歪体１を下降さ
せるとピン３の両端は対向する支持体５の段状部１１内
に納まる。これによりピン３は段状部１１に係止され、
かつ軸心方向への移動が規制され、起歪体からの抜け落
ちが防止される。このようにして起歪体両端のピンを段
状部１１に係止することによりピン３を介して起歪体１
を支持体５により支持する。When exchanging with the flexure element 1 in the above configuration, first the flexure element 1 is lifted so that the pin insertion hole 4 of the flexure element 1 and the pin insertion hole 10 of the support body 5 are at substantially the same position. Become. In this state, the pin 3 is pulled out through the pin insertion hole 10 of the support body 5. The strain element can be taken out by pulling out the pins 3 at both ends of the strain element 1.
Take out and replace with a new strain body. Subsequently, the pin 3 is inserted into the new strain body 1 through the pin insertion hole 10 of the support body 5.
When the tip reaches the stepped portion of the support on the opposite side, the flexure element 1 is gently lowered. Since the entire length of the pin 3 is substantially equal to the distance W between the step portions, both ends of the pin 3 are set in the step portions 11 of the opposing support 5 when the flexure element 1 is lowered. As a result, the pin 3 is locked to the stepped portion 11,
In addition, the movement in the axial direction is regulated, and the slip-out from the flexure element is prevented. In this way, by locking the pins at both ends of the strain-flexing body to the stepped portion 11, the strain-generating body 1 is inserted through the pin 3.
Are supported by the support 5.
この構成のロードセルにおいて、起歪体１に対して被測
定物の荷重が加わって起歪体が変形した場合、ピン３と
起歪体１との相対的な回動運動により被測定物の荷重は
全て起歪体を変形する応力として作用し、正確な荷重測
定を行うことができる。また起歪体１がその軸心方向に
伸縮しても、段状部１１に沿ってピン３が移動すること
によりこれを吸収する。従ってこの場合も被測定物の荷
重が起歪体以外の他の部材に対して曲げ応力として作用
することはなく、正確な測定が保証される。In the load cell having this configuration, when the load of the object to be measured is applied to the flexure element 1 and the flexure element is deformed, the load of the object to be measured is caused by the relative rotational movement of the pin 3 and the flexure element 1. All act as stress that deforms the strain body, and accurate load measurement can be performed. Further, even if the strain body 1 expands and contracts in the axial direction, the pin 3 moves along the stepped portion 11 to absorb it. Therefore, in this case as well, the load of the object to be measured does not act as a bending stress on members other than the flexure element, and accurate measurement is guaranteed.
第３図は第２の実施例を示す。FIG. 3 shows a second embodiment.
この実施例においては、ピン３の両端のうち少なくとも
一方の端部に対して把手１２を取りつけ、起歪体交換時
のピンの引き抜き及び挿入を容易に行えるようにしてい
る。また対向する一対の支持体５の一方の下端部には開
口１３を形成し、引き上げた起歪体１を載置する高さ調
節部材１４が挿入可能になっている。In this embodiment, a handle 12 is attached to at least one of the two ends of the pin 3 so that the pin can be easily pulled out and inserted when the flexure element is replaced. Further, an opening 13 is formed at one of the lower ends of the pair of supporting bodies 5 facing each other, and a height adjusting member 14 for mounting the pulled up flexure element 1 can be inserted therein.
この構成の場合、起歪体１の交換に当たっては先ず起歪
体１を持ち上げ、この間に開口１３から高さ調節部材１
４を挿入する。起歪体１の両端下部に各々高さ調節部材
１４を挿入したならば、起歪体１をこの部材上に下ろ
す。高さ調節部材１４の高さは、この上に載置した起歪
体１のピン挿通孔４と支持部材５のピン挿通孔１０とが
ほぼ一致するよう予め形成してあり、この状態でピン３
を引き抜き起歪体１を取り去る。In the case of this configuration, when exchanging the flexure element 1, first the flexure element 1 is lifted, and during this time, the height adjusting member 1 is opened from the opening 13.
Insert 4. After the height adjusting members 14 are inserted into the lower portions of both ends of the flexure element 1, the flexure element 1 is lowered onto the members. The height of the height adjusting member 14 is preliminarily formed so that the pin insertion hole 4 of the flexure element 1 and the pin insertion hole 10 of the support member 5 placed on the height adjustment member 14 are substantially aligned with each other. Three
And the strain body 1 is removed.
新たな起歪体はこの高さ調節部材１４上に載置すること
により各ピン挿通孔４及び１０が一致するので、容易に
ピン３を挿通することができる。２本のピン３を挿通し
たならば起歪体１をやや持ち上げ加減にして高さ調節部
材１４を引き抜き、起歪体１を下降させる。これにより
ピン３の両端は支持部材５の段状部１１に係止され起歪
体１を支持する。By mounting a new flexure element on the height adjusting member 14, the pin insertion holes 4 and 10 are aligned with each other, so that the pin 3 can be easily inserted. When the two pins 3 are inserted, the flexure element 1 is slightly lifted up and down, the height adjusting member 14 is pulled out, and the flexure element 1 is lowered. As a result, both ends of the pin 3 are locked to the stepped portion 11 of the support member 5 to support the flexure element 1.
第４図は第３の実施例を示す。FIG. 4 shows a third embodiment.
この実施例では、支持体５のピン挿通孔１０に連接する
段状部１１をピン挿通孔１０の内径とほぼ等しい内径の
半円により形成し、起歪体１の軸心方向に対するピン３
の移動をある規制するようにしてある。但し、起歪体１
の軸心方向への伸びを吸収するため、段状部１１の形成
半径はピン３の半径よりやや大きめとしておくのが望ま
しい。In this embodiment, the stepped portion 11 connected to the pin insertion hole 10 of the support body 5 is formed by a semicircle having an inner diameter substantially equal to the inner diameter of the pin insertion hole 10, and the pin 3 in the axial direction of the flexure element 1 is formed.
There are some restrictions on the movement of the. However, strain body 1
It is desirable that the radius of formation of the stepped portion 11 be set to be slightly larger than the radius of the pin 3 in order to absorb the extension in the axial direction.
第５図は第４の実施例を示す。FIG. 5 shows a fourth embodiment.
この実施例では、支持体５に形成したピン挿通孔１０の
内径をピン３の外径に比較して充分大きく形成し、ピン
３の引き抜き及び挿入時の芯合わせを容易にしている。
なお、段状部１１の形成半径は前述の実施例の場合と同
様ピン３の半径よりもやや大きい程度とし、起歪体１が
軸心方向に極端に移動するのを防止するようにしてお
く。In this embodiment, the inner diameter of the pin insertion hole 10 formed in the support body 5 is made sufficiently larger than the outer diameter of the pin 3 to facilitate the alignment of the pin 3 when it is pulled out and inserted.
The radius of formation of the stepped portion 11 is set to be slightly larger than the radius of the pin 3 as in the case of the above-mentioned embodiment, so that the flexure element 1 is prevented from extremely moving in the axial direction. .
本考案は以上その構成を詳細に説明したように、対向す
る支持体に対してピン挿通孔に連接して段状部を形成す
る構造としたので、ピン支持構造の利点を何ら失うこと
なく、起歪体支持用のピンの引き抜き・挿入を容易行え
ると共に、段状部に係止後はピンの軸心方向への移動を
規制しピンの脱落等を完全に防止できる。As described in detail above, the present invention has the structure in which the stepped portion is formed by connecting to the pin insertion hole with respect to the opposing support member, so that the advantage of the pin support structure is not lost. The pin for supporting the flexure element can be easily pulled out and inserted, and after locking to the stepped portion, the movement of the pin in the axial direction can be restricted to completely prevent the pin from falling off.
第１図は本考案の第１の実施例を示すピン支持部を中心
とする起歪体の断面図、第２図は第１図のＡ−Ａ線によ
る断面図、第３図は第２の実施例を示すピン支持部を中
心とする起歪体の断面図、第４図（Ａ）は第３の実施例
を示す支持体の正面図、同（Ｂ）は同（Ａ）のＢ−Ｂ線
による断面図、第５図（Ａ）は第４の実施例を示す支持
体の正面図、同（Ｂ）は同（Ａ）のＣ−Ｃ線による断面
図、第６図は別途提案中のピン支持型ロードセルの側面
図、第７図は第６図のＤ−Ｄ線による断面図、第８図は
トラックスケールの側面図である。 １……起歪体、３……起歪体支持用ピン ４……起歪体側ピン挿通孔 ５……支持体、１０……支持体側ピン挿通孔、１１……
段状部、１２……把手FIG. 1 is a sectional view of a flexure element centering on a pin support portion showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 4A is a sectional view of the flexure element centering around the pin support portion, FIG. 4A is a front view of the support body according to the third embodiment, and FIG. -B is a sectional view, FIG. 5 (A) is a front view of the support body showing the fourth embodiment, FIG. 5 (B) is a sectional view taken along the line CC of FIG. FIG. 7 is a side view of the proposed pin-supporting load cell, FIG. 7 is a sectional view taken along the line DD of FIG. 6, and FIG. 8 is a side view of a track scale. 1 ... Strain element, 3 ... Strain element support pin 4 ... Strain element side pin insertion hole 5 ... Support, 10 ... Support side pin insertion hole, 11 ...
Step, 12 ... Handle
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭51−17472（ＪＰ，Ａ) 特開 昭51−56261（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-51-17472 (JP, A) JP-A-51-56261 (JP, A)
Claims (3)
持することにより起歪体及び起歪体に加わった被測定物
の荷重を支持するロードセルであって、対向する支持体
の対向面に対して段状部を形成し、この段状部に対して
ピンの両端が各々係止するように構成したことを特徴と
するピン支持型ロードセル。1. A load cell for supporting a load of an object to be measured applied to a strain body by supporting both ends of a pin inserted in the strain body with a support body, the load cell being opposed to the support body. A pin-supporting load cell, characterized in that a stepped portion is formed on the facing surface, and both ends of the pin are engaged with the stepped portion.
一方の端部に把手を取りつけたことを特徴とする実用新
案登録請求の範囲第（１）項記載のピン支持型ロードセ
ル。2. A pin-supported load cell according to claim 1, wherein a handle is attached to at least one end of both ends of the pin for supporting the flexure element.
歪体下部に挿入可能に構成したことを特徴とする実用新
案登録請求の範囲（１）項または第（２）項記載のピン
支持型ロードセル。3. A utility model registration claim (1) or (2), characterized in that a height adjusting member for adjusting the height of the flexure element is configured to be insertable below the flexure element. The pin-supported load cell described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3969788U JPH0632581Y2 (en) | 1988-03-28 | 1988-03-28 | Pin-supported load cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3969788U JPH0632581Y2 (en) | 1988-03-28 | 1988-03-28 | Pin-supported load cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01142817U JPH01142817U (en) | 1989-09-29 |
| JPH0632581Y2 true JPH0632581Y2 (en) | 1994-08-24 |
Family
ID=31266194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3969788U Expired - Lifetime JPH0632581Y2 (en) | 1988-03-28 | 1988-03-28 | Pin-supported load cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0632581Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013526713A (en) * | 2010-05-17 | 2013-06-24 | 永正▲伝▼感（杭州）有限公司 | Tensile weighing module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4595927B2 (en) * | 2006-11-15 | 2010-12-08 | トヨタ自動車株式会社 | Pedal operation amount detection device |
-
1988
- 1988-03-28 JP JP3969788U patent/JPH0632581Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013526713A (en) * | 2010-05-17 | 2013-06-24 | 永正▲伝▼感（杭州）有限公司 | Tensile weighing module |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01142817U (en) | 1989-09-29 |
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