JP2001083024A - Fitting structure for block which is capable of use as roverval mechanism or load cell strain generator - Google Patents
Fitting structure for block which is capable of use as roverval mechanism or load cell strain generatorInfo
- Publication number
- JP2001083024A JP2001083024A JP26311099A JP26311099A JP2001083024A JP 2001083024 A JP2001083024 A JP 2001083024A JP 26311099 A JP26311099 A JP 26311099A JP 26311099 A JP26311099 A JP 26311099A JP 2001083024 A JP2001083024 A JP 2001083024A
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- Japan
- Prior art keywords
- block
- load
- mounting
- support member
- transmitting member
- 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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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はロバーバル機構又は
ロードセル用起歪体として利用可能なブロックを取り付
ける構造に関し、特に当該ブロックにおける未調整状態
の四隅誤差（以下「初期四隅誤差」とする）の量を従来
よりも少なくすることのできる取付構造に関する。な
お、「四隅誤差」とは秤量皿に負荷される荷重の偏りに
よって機構上発生する計量誤差をいう。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a block that can be used as a roberval mechanism or a flexure element for a load cell. And a mounting structure capable of reducing the number of mounting members as compared with the related art. The “four corner errors” refer to weighing errors generated by the mechanism due to the bias of the load applied to the weighing pan.
【０００２】[0002]
【従来の技術】図６はロードセルの起歪体或いはロバー
バル機構として用いられる金属ブロックを示す。なお、
ロバーバル機構は通常、副桿と称する部材、これらを接
続する板ばね等の接続部材等、複数の部材から構成され
るが、一つの金属ブロックにより構成されるロバーバル
機構を以下一体型ロバーバル機構と称する。2. Description of the Related Art FIG. 6 shows a metal block used as a flexure element or a Robarbal mechanism of a load cell. In addition,
The roberval mechanism is usually composed of a plurality of members such as a member called a sub-rod and a connecting member such as a leaf spring for connecting these members. A roberval mechanism composed of one metal block is hereinafter referred to as an integrated roberval mechanism. .
【０００３】図中、符号５０はブロックを示す。このブ
ロック５０の下部５０ａの一端は装置本体と接続する支
持部材５１と接続し、この支持部材５１によりブロック
５０全体が片持に支持されている。一方ブロック上部５
０ｂにおいて、前記支持部材５１と接続する側と対向す
る端部には秤量物の荷重を受ける秤量皿５３が配置され
ている。In the figure, reference numeral 50 denotes a block. One end of a lower portion 50a of the block 50 is connected to a support member 51 connected to the apparatus main body, and the entire block 50 is cantilevered by the support member 51. On the other hand, upper block 5
In FIG. 0b, a weighing dish 53 for receiving a load of a weighing object is disposed at an end opposite to the side connected to the support member 51.
【０００４】上記の構成において、秤量皿５３に荷重Ｗ
が加わると、ブロック５０及びこの荷重Ｗを含め、全て
の荷重が支持部材５１により支持されることになる。こ
の場合ブロック５０には当該ブロック５０の支持軸ＸＬ
１から荷重Ｗの負荷位置までの距離ＭＡ１をモーメント
アームとする回転モーメントＭ１が生じ、ブロック５０
の各薄肉部５４ａ、５４ｂ、５４ｃ、５４ｄを中心とし
て、引っ張り応力や圧縮応力が複雑に生じることにな
る。つまりこの取付構造は荷重の負荷によりブロック５
０の各部において複雑な応力が生じ、しかもこの応力は
秤量皿に対する荷重の負荷位置により変化するため、ブ
ロック５０の取り付け後で初期四隅誤差が大きくなる取
り付け構造となっている。In the above arrangement, the weight W
Is applied, all the loads including the block 50 and the load W are supported by the support member 51. In this case, the block 50 has a support axis XL of the block 50.
A rotation moment M1 having a moment arm as a distance MA1 from the position 1 to the load position of the load W is generated.
The tensile stress and the compressive stress are generated in a complicated manner around the thin portions 54a, 54b, 54c and 54d. In other words, this mounting structure is used for the block 5
Since a complex stress is generated in each part of the block 50 and the stress varies depending on the position of the load on the weighing pan, the mounting structure is such that the initial four corner errors become large after the block 50 is mounted.
【０００５】上記ブロック５０をロードセルの起歪体と
して用いる場合には、ロードセルの分解能は高くても数
万分の１であるため、ブロック各部を調整することによ
り四隅誤差を調整することは可能であるが、例えば数十
万分の１から数百万分の１の高い分解能を有する電磁平
衡式電子秤のロバーバル機構として用いる場合には、こ
の様な初期四隅誤差の大きな取り付け構造では事後の調
整は事実上不可能となってしまう。When the block 50 is used as a flexure element of a load cell, since the resolution of the load cell is at most 1 / tens of thousands, it is possible to adjust the four corner errors by adjusting each part of the block. However, for example, when using as a roberval mechanism of an electromagnetic balance type electronic balance having a high resolution of several hundred thousandth to several millionth, post-adjustment is required with such a mounting structure having a large initial four corner error. Becomes virtually impossible.
【０００６】図７は他の従来例を示す。この実施例にお
いてはブロック５０の一方の側縁５０ｃが支持部材５１
により支持固定された支持構造となっているが、この構
成の場合も支持軸ＸＬ２と荷重Ｗの負荷位置までの距離
ＭＡ２をモーメントアームする回転モーメントＭ２が生
じて、前記従来例と同様ブロック５０の各部に複雑な応
力が生じることにかわりはない。FIG. 7 shows another conventional example. In this embodiment, one side edge 50c of the block 50 is
In this case, a rotational moment M2 momentally arming the distance MA2 between the support shaft XL2 and the load position of the load W is generated. Complex stress is still generated in each part.
【０００７】図８は更に他の従来例を示す。この例では
ブロック５０の下部５０ａの一端が支持部材５１により
支持され、かつブロック上面５０ｂにおいて、支持部材
取付側端部と対向する端部には荷重伝達部材５５の一端
が固定され、秤量皿５３はこの荷重伝達部材５５の他端
に取り付けられ、秤量皿５３の中心はブロック５０のほ
ぼ中央部に位置するよう構成されている。この構成によ
り負荷された荷重Ｗを含めブロック５０全体は、支持軸
ＸＬ３と荷重伝達部材５５のブロック取付部との距離Ｍ
Ａ３1 をモーメントアームする回転モーメントＭ３1 が
生じると共に、秤量皿５３に負荷される荷重Ｗによっ
て、荷重負荷部と支持軸ＸＬ４との距離ＭＡ３2 をモー
メントアームとする逆方向のモーメントＭ３2 が生じ
る。このように逆のモーメントにより各モーメントは打
ち消され、前記二つの従来例に比較して荷重Ｗの負荷時
に、ブロック５０の各側縁５０ｃ及び５０ｄは相対的に
平行移動する理想的な変形が期待される。FIG. 8 shows a further conventional example. In this example, one end of a lower portion 50a of the block 50 is supported by a support member 51, and one end of a load transmitting member 55 is fixed to an end of the block upper surface 50b opposite to the end on the support member mounting side. Is attached to the other end of the load transmitting member 55, and the center of the weighing dish 53 is located substantially at the center of the block 50. The entire block 50 including the load W applied by this configuration has a distance M between the support shaft XL3 and the block mounting portion of the load transmitting member 55.
A3 with 1 rotation moment M3 1 to moment arm caused by the load W loaded on the weighing pan 53, reverse moment M3 2 results for the distance MA3 2 between the load application part and the support shaft XL4 and the moment arm . In this way, the opposite moments cancel each other, and the side edges 50c and 50d of the block 50 are relatively deformed in parallel with each other when the load W is applied, as compared with the two conventional examples. Is done.
【０００８】しかしながら、支持部材５１はブロック５
０の下面５０ａに対し、荷重伝達用部材５５はブロック
５０の上面に対しそれぞれ取り付けられているため、ブ
ロック５０の変形の際に実際の基準となる軸は、ブロッ
ク５０と各部材５１、５５の接合面に位置する軸ＸＬ３
´、ＸＬ４´であるため、ブロック５０にはやはり複雑
な応力が発生し、初期四隅誤差は期待したほど小さくは
ならなかった。However, the supporting member 51 is
Since the load transmitting member 55 is attached to the upper surface of the block 50 with respect to the lower surface 50a of the block 50, the axis serving as an actual reference when the block 50 is deformed is the axis of the block 50 and the members 51 and 55. Axis XL3 located on the joint surface
, XL4 ', a complicated stress was also generated in the block 50, and the initial four corner errors did not become as small as expected.
【０００９】[0009]
【課題を解決するための手段】本発明は上述の従来技術
の問題点に鑑み構成したものであって、ロバーバル機構
として或いはロードセル用起歪体として用いられる一体
構造型のブロック（以下単に「ブロック」と称する）
と、このブロックを支持する支持部材と、秤量皿を取り
付ける荷重伝達部材とを有し、支持部材と荷重伝達部材
とは基本的に相似形状として構成され、かつこれら支持
部材と荷重伝達部材はブロックの両側部とそれぞれ接続
することによって、これらブロックと支持部材及び荷重
伝達部材とが接続した一体構造は、ブロックのほぼ中心
点に対してほぼ点対称の形状に構成されることにより、
初期四隅誤差を従来に比較して小さくすることができる
ブロックの取付構造である。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has an integral structure type block (hereinafter simply referred to as a "block") used as a roberval mechanism or as a load cell flexure element. ")
And a supporting member for supporting the block, and a load transmitting member for attaching a weighing pan, the supporting member and the load transmitting member are basically formed in a similar shape, and the supporting member and the load transmitting member are formed of a block. By connecting to each side of the block, the integrated structure in which these blocks are connected to the support member and the load transmitting member is formed in a substantially point-symmetrical shape with respect to a substantially center point of the block.
This is a block mounting structure in which the initial four corner errors can be reduced as compared with the related art.
【００１０】[0010]
【発明の実施の形態】支持部材と荷重伝達部材は、ほぼ
同一の形状、例えば何れの部材もブロックの側面と接続
する接続部と、この接続部に対して直交する固定部とか
ら成り、側面形状が略「Ｌ」字状に形成されている。こ
れら支持部材と荷重伝達部材は、それぞれの本体部がブ
ロックを介して相互に平行に位置するようにして各接続
部によりブロックの両側面に各々固定される。ブロック
と支持部材及び荷重伝達部材により一体化された構造は
ブロックのほぼ中心点を中心として、点対称の形状に形
成される。BEST MODE FOR CARRYING OUT THE INVENTION A supporting member and a load transmitting member have substantially the same shape, for example, a connecting portion for connecting any member to a side surface of a block and a fixing portion orthogonal to the connecting portion. The shape is substantially "L" shaped. The support member and the load transmitting member are fixed to both side surfaces of the block by the respective connection portions such that the respective main body portions are positioned parallel to each other via the block. The structure integrated by the block, the support member and the load transmitting member is formed in a point-symmetrical shape with the center of the block being substantially at the center.
【００１１】上記構成において、支持部材と荷重伝達部
材の剛性を十分に確保することによって、秤量皿に負荷
される荷重の負荷方向の軸と、ブロックを含めてこの荷
重を支持し、前記荷重の負荷方向と逆向きに反力の作用
する軸とがほぼ同一軸となることによって、ブロックに
対しては複雑な応力が殆ど生ぜず、このため同構造の初
期四隅誤差は従来構成に比較して大幅に小さなものとな
る。[0011] In the above configuration, by ensuring sufficient rigidity of the support member and the load transmitting member, the load is supported including the block in the direction of the load applied to the weighing pan and the block. Since the axis on which the reaction force acts in the opposite direction to the load direction is almost the same axis, there is almost no complicated stress on the block. Therefore, the initial four-corner error of the same structure is smaller than that of the conventional structure. It will be much smaller.
【００１２】[0012]
【実施例】以下本発明の実施例を図面を参考に具体的に
説明する。図１は第１の実施例を示し、符号１は一体型
ロバーバル機構として或いはロードセル用起歪体として
用いられるブロックでり、同ブロック１には上下４か所
に薄肉部２ａ、２ｂ、２ｃ、２ｄが形成されている。符
号３は支持部材であって、ブロック１の側面部１ａを介
してブロック１が取り付けられる取付部３ａと、この取
付部３ａと直交するよう構成されている固定部３ｂとか
ら成り、支持部材３全体が側面略「Ｌ」字状に形成され
ている。支持部材３の固定部３ｂは基台部４に固定さ
れ、これによってブロック１は支持部材４により片持で
かつ水平に支持される構造となっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows a first embodiment, in which reference numeral 1 denotes a block used as an integrated roberval mechanism or as a strain-generating body for a load cell, and the block 1 has four thin portions 2a, 2b, 2c at upper and lower positions. 2d is formed. Reference numeral 3 denotes a support member, which includes a mounting portion 3a to which the block 1 is mounted via the side surface portion 1a of the block 1 and a fixing portion 3b configured to be orthogonal to the mounting portion 3a. The whole is formed in a substantially L-shaped side surface. The fixing portion 3b of the support member 3 is fixed to the base portion 4, so that the block 1 is cantilevered and horizontally supported by the support member 4.
【００１３】符号５は荷重伝達部材であって、前記支持
部材３と同じ形状及び構造に構成されている。即ち、ブ
ロック１の他の側面部１ｃに接続する取付部５ａと、こ
の取付部５ａと直交するよう構成されている荷重受け部
５ｂとから成り、荷重伝達部材５全体が前記支持部材３
と同様側面略「Ｌ」字状に形成されている。支持部材３
の固定部３ｂがブロック１の下面部１ｂと平行に位置す
るのに対してこの荷重伝達部材５は、荷重受け部５ｂが
ブロック１の上面部１ｄと平行位置するように配置さ
れ、これにより支持部材３の固定部３ｂと荷重伝達部材
５の荷重受け部５ｂとは、鉛直方向から見た場合にその
一部が重複するようにしてブロック１を介して平行に位
置するように構成される。Reference numeral 5 denotes a load transmitting member, which has the same shape and structure as the support member 3. That is, the mounting member 5a is connected to the other side surface portion 1c of the block 1 and the load receiving portion 5b is configured to be orthogonal to the mounting portion 5a.
Similarly, the side surface is formed in a substantially “L” shape. Support member 3
While the fixing portion 3b of the block 1 is positioned parallel to the lower surface 1b of the block 1, the load transmitting member 5 is disposed such that the load receiving portion 5b is positioned parallel to the upper surface 1d of the block 1, and The fixing portion 3b of the member 3 and the load receiving portion 5b of the load transmitting member 5 are configured to be positioned in parallel via the block 1 such that a part thereof overlaps when viewed from the vertical direction.
【００１４】荷重伝達部材５の荷重受け部５ｂには、荷
重Ｗを負荷する中心がブロック１の中央線Ｌ２に位置す
るようにして秤量皿５３が取り付けられ、かつ支持部材
３はこの荷重伝達部材５とほぼ同一形状及び大きに形成
されているため、当該中央線Ｌ２はブロック１の下部に
位置する支持部材３の固定部３ｂも通過することにな
る。また図からも明らかなとおり、ブロック１、支持部
材３、荷重伝達部材５からなる一体構造は、当該中央線
に位置するブロック１の中心点Ｐを中心とした点対称の
形状に形成される。A weighing dish 53 is attached to the load receiving portion 5b of the load transmitting member 5 so that the center for applying the load W is located at the center line L2 of the block 1, and the support member 3 is connected to the load transmitting member 5. 5, the center line L2 also passes through the fixing portion 3b of the support member 3 located below the block 1. Further, as is apparent from the drawing, the integrated structure including the block 1, the support member 3, and the load transmitting member 5 is formed in a point-symmetrical shape about the center point P of the block 1 located at the center line.
【００１５】支持部材３及び荷重伝達部材５の剛性を十
分にとることによって、秤量皿５３に加えられた荷重Ｗ
は荷重伝達部材５を介してブロック１に伝達され、かつ
支持部材３も高い剛性を有しているため、この荷重のほ
ぼ全てが固定部３ｂに伝達される。これにより秤量皿５
３に加わった荷重Ｗは結果的に前記中央線Ｌ２上に負荷
され、反対にこの荷重に対する反力Ｗ´もこの中央線Ｌ
２において上記荷重Ｗと反対方向に作用することにな
る。従って、荷重Ｗと反力Ｗ´とが同一軸線上に位置す
る結果、ブロック１に対しては均一なモーメント荷重が
加わることになる。When the rigidity of the support member 3 and the load transmitting member 5 is sufficiently secured, the load W
Is transmitted to the block 1 via the load transmitting member 5 and the support member 3 also has high rigidity, so that almost all of the load is transmitted to the fixed portion 3b. Thereby, the weighing pan 5
3 is consequently loaded on the center line L2, and conversely, the reaction force W 'for this load also increases in the center line L2.
In 2, the load W acts in the opposite direction. Therefore, as a result of the load W and the reaction force W ′ being located on the same axis, a uniform moment load is applied to the block 1.
【００１６】図３は、荷重Ｗが負荷された際のブロック
の変形状態示す。但し、実際の変形は僅かであって視認
が困難であるが、本図では変形を明瞭に示すためその変
形量を誇張して表示している。荷重Ｗが負荷されると、
ブロック１は薄肉部２ａ〜２ｄを中心として変形し、ブ
ロック１の側縁部１ｃは支持部材３が接続する側の側縁
部１ａに対して平行移動するよう、ほぼ理想的な変形を
する。このため、図示するブロック１の取付構造は初期
四隅誤差が少なく、しかもほぼ理想的な変形をするた
め、一体型のロバーバル機構としてのみでなく、ロード
セル用起歪体としても十分機能する構造とすることがで
きる。FIG. 3 shows a deformed state of the block when a load W is applied. However, although the actual deformation is slight and is difficult to visually recognize, in this figure, the amount of deformation is exaggerated to clearly show the deformation. When the load W is applied,
The block 1 is deformed around the thin portions 2a to 2d, and the side edge 1c of the block 1 is almost ideally deformed so as to move in parallel with the side edge 1a to which the support member 3 is connected. For this reason, the mounting structure of the block 1 shown in the figure has a small initial four-corner error and is almost ideally deformed, so that it is a structure that functions not only as an integrated roberval mechanism but also as a load cell flexure element. be able to.
【００１７】図２は上記構成を、一体型ロバーバル機構
として予め構成したブロックに応用したものを示す。こ
のブロック６は、電磁平衡式秤量装置に使用する機構と
して出願人が先に提案している一体型ロバーバル機構
（特願平１１−８７９３７号）用のブロックに応用した
ものである。このブロックは薄肉部６ａ、６ｂ、６ｃ、
６ｄを形成するブロック空間部に、梁部７が突出し、こ
の梁部７には板ばね等からなる支点部材８を介して荷重
伝達用ビーム９が設けられている。またブロック６のう
ち荷重伝達部材５が接続する可動部側には接続部材１０
が接続し、当該接続部材１０の他端は前記荷重伝達用ビ
ーム９の端部に接続されることにより、当該荷重伝達用
ビーム９は前記支点部材８を支点として、ブロック６の
可動部の変移に対応して揺動するよう構成されている。
またこの荷重伝達部用ビーム９の他端は電磁部１１に接
続し、電磁部１１においてビームの揺動変位を打ち消す
電磁力を発生させるよう電気的な出力を行い、この際の
電気量により荷重Ｗを算出する。FIG. 2 shows an example in which the above-described configuration is applied to a block previously configured as an integrated roberval mechanism. The block 6 is applied to a block for an integrated roberval mechanism (Japanese Patent Application No. 11-87937) previously proposed by the applicant as a mechanism used for an electromagnetic balance type weighing device. This block has thin portions 6a, 6b, 6c,
A beam 7 protrudes from a block space forming 6d, and a beam 9 for load transmission is provided on the beam 7 via a fulcrum member 8 made of a leaf spring or the like. A connecting member 10 is provided on the movable part side of the block 6 to which the load transmitting member 5 is connected.
Are connected, and the other end of the connecting member 10 is connected to the end of the load transmitting beam 9, so that the load transmitting beam 9 shifts the movable portion of the block 6 around the fulcrum member 8 as a fulcrum. It is configured to swing in response to.
The other end of the load transmitting beam 9 is connected to the electromagnetic unit 11, and the electromagnetic unit 11 performs an electrical output so as to generate an electromagnetic force for canceling the oscillating displacement of the beam. Calculate W.
【００１８】上記の構成における電磁平衡式の秤量装置
では、分解能を百万分の１、或いはそれ以上に設定する
ため、各薄肉部６ａ〜６ｂは極めて薄く形成されてお
り、組立後の四隅調整の余地はその構成上非常に限られ
たものとなり、初期四隅誤差が小さな本構成は高分解能
の秤量装置用のロバーバル機構の取付構造として非常に
有効な構成である。In the electromagnetic balance type weighing device having the above-described configuration, each of the thin portions 6a to 6b is formed to be extremely thin in order to set the resolution to one-millionth or more. This configuration is very limited in its configuration, and this configuration having a small initial four-corner error is a very effective configuration as a mounting structure of a roberval mechanism for a high-resolution weighing device.
【００１９】図４及び図５は他の実施例を示す。上記の
実施例において、初期四隅誤差を小さくする構成を示し
たが、その性能を十分に発揮するためには、ブロック１
及び６に取り付けられる支持部材３と荷重伝達部材５の
剛性を十分に確保しておく必要がある。本実施例ではこ
れら各部材の剛性をより高める構成を示す。FIGS. 4 and 5 show another embodiment. In the above-described embodiment, the configuration in which the initial four corner errors are reduced has been described.
And 6, the rigidity of the support member 3 and the load transmitting member 5 attached to the support member 6 must be sufficiently ensured. In this embodiment, a configuration is shown in which the rigidity of each of these members is further increased.
【００２０】図４は支持部材３の屈曲部、即ち取付部３
ａと固定部３ｂとの接合部を中心に示している。前記実
施例では二点鎖線３´及び実線３´´で示すように取付
部３ａと固定部３ｂとは側面形状が矩形に形成され、か
つこの矩形が接合するよう構成されているが、本実施例
ではこの接合部を補強することにより、支持部材３の剛
性をより高めるよう構成している。FIG. 4 shows the bent portion of the support member 3, that is, the mounting portion 3.
The center of the figure shows a joint portion between a and the fixing portion 3b. In the above embodiment, as shown by the two-dot chain line 3 'and the solid line 3'', the mounting portion 3a and the fixing portion 3b are formed so that the side surfaces are rectangular, and this rectangle is joined. In the example, the rigidity of the support member 3 is further enhanced by reinforcing this joint.
【００２１】図中３ｘ1 は取付部３ａと固定部３ｂとが
直交するよう位置する接合部の両側に形成された補強梁
部であり（図５も併せて参照）、ブロック１に加わった
荷重により支持部材３の取付部３ａが固定部３ｂ側に屈
曲変位するのを防止する補強材として機能するうよう構
成されている。なおこの場合、補強梁部３ｘ1 側には圧
縮荷重が加わり、反対に取付部３ａの背側には引っ張り
荷重が加わるため、この引っ張り荷重に対抗するよう符
号３ｘ2 で示すようよに取付部３ａの外側に膨出する膨
出部を設けるとより一層補強効果を高めることができ
る。[0021] figure 3x 1 is a reinforcing beam portion and the mounting portion 3a and the fixed portion 3b are formed on both sides of the joint portions located to quadrature (see also FIG. 5 together), the load applied to the block 1 Thereby, the mounting portion 3a of the support member 3 is configured to function as a reinforcing member for preventing the attachment portion 3a from being bent and displaced toward the fixed portion 3b. It should be noted that in this case, the reinforcing beam portions 3x 1 side joined by a compression load, to join the tensile load on the back side of the mounting portion 3a opposite the mounting portion so Yo as at 3x 2 to counteract the tension load By providing a swelling portion swelling outside of 3a, the reinforcing effect can be further enhanced.
【００２２】以上補強構造の構成を支持部材３を例に説
明したが、荷重伝達部材５の取付部５ａと荷重受け部５
ｂとの接合部に対しても同様の構成とすることが望まし
い。Although the structure of the reinforcing structure has been described by taking the support member 3 as an example, the mounting portion 5a of the load transmitting member 5 and the load receiving portion 5
It is desirable to have the same configuration for the joint with b.
【００２３】[0023]
【発明の効果】以上本発明を各実施例により具体的に説
明したように、本発明によれば荷重伝達部材と支持部材
とを含むブロックの構成を、ブロックのほぼ中心部分の
点を中心としてほぼ点対称に構成し、この結果荷重の負
荷とこの負荷された荷重に対する反力の作用する位置を
ほぼ同一軸線上に位置させることによって、ブロックに
対する複雑な応力の発生を極力減少させることができ、
この結果初期四隅誤差を従来構造に比較して大幅に小さ
くすることが可能となる。As described above, the present invention has been described in detail with reference to the embodiments. According to the present invention, the structure of the block including the load transmitting member and the supporting member is described with reference to a point substantially at the center of the block. It is possible to reduce the generation of complicated stress on the block as much as possible by arranging the points approximately symmetrically, and by arranging the load and the position where the reaction force against the applied load acts on almost the same axis. ,
As a result, the initial four corner errors can be significantly reduced as compared with the conventional structure.
【図１】本発明の第１の実施例を示すブロック取り付け
構造の側面図である。FIG. 1 is a side view of a block mounting structure showing a first embodiment of the present invention.
【図２】図１に示すブロック取り付け構造におけるブロ
ックの変形状態を示す側面図である。FIG. 2 is a side view showing a deformed state of the block in the block mounting structure shown in FIG.
【図３】本発明の第２の実施例を示すブロック取り付け
構造の側面図である。FIG. 3 is a side view of a block mounting structure according to a second embodiment of the present invention.
【図４】本発明の他の実施例を示す支持部材の拡大部分
図である。FIG. 4 is an enlarged partial view of a support member showing another embodiment of the present invention.
【図５】荷重伝達部材を取り外した状態で、図４の構造
を示すブロック支持構造の平面図である。5 is a plan view of the block support structure showing the structure of FIG. 4 with the load transmitting member removed.
【図６】従来例を示すブロック取り付け構造の側面図で
ある。FIG. 6 is a side view of a block mounting structure showing a conventional example.
【図７】他の従来例を示すブロック取り付け構造の側面
図である。FIG. 7 is a side view of a block mounting structure showing another conventional example.
【図８】更に他の従来例を示すブロック取り付け構造の
側面図である。FIG. 8 is a side view of a block mounting structure showing still another conventional example.
１ ブロック １ａ、１ｂ （ブロックの）側縁部 ２ａ、２ｂ、２ｃ、２ｄ （ブロックの）薄肉部 ３ 支持部材 ３ａ （支持部材の）取付部 ３ｂ （支持部材の）固定部 ３ｘ1 補強梁部 ３ｘ2 膨出部 ４ 基台部 ５ 荷重伝達部材 ５ａ （荷重伝達部材の）取付部 ５ｂ （荷重伝達部材の）固定部 ６ ブロック（一体型ロバーバル機構） ５３ 秤量皿 Ｗ 荷重 Ｗ´ 反力Reference Signs List 1 Block 1a, 1b Side edge (of block) 2a, 2b, 2c, 2d Thin portion (of block) 3 Support member 3a Mounting portion (of support member) 3b Fixed portion (of support member) 3x 1 Reinforcement beam 3x 2 bulging part 4 base part 5 load transmitting member 5a mounting part (of load transmitting member) 5b fixing part (of load transmitting member) 6 block (integrated roberval mechanism) 53 weighing pan W load W 'reaction force
Claims (5)
用起歪体として利用されるよう形成された一体型のブロ
ックを片持支持し、かつこのブロックに対して荷重を伝
達する部材が設けられたブロックの取付構造において、
ブロックを支持する支持部材はブロックの側縁に固定さ
れる取付部と、この取付部に対して取付られたブロック
を水平に支持する固定部とからなり、ブロックに荷重を
伝達する荷重伝達部材は支持部材取付側の側縁と対向す
る側のブロック側縁に取り付けられる取付部と、ブロッ
クを介して前記支持部材の本体部と平行に位置する荷重
受け部とを有し、荷重伝達部材の荷重受け部には秤量皿
等の荷重を直接受ける部材が接続され、支持部材と荷重
伝達部材とはブロックのほぼ中心部に位置する点を対称
点としてほぼ点対称に形成され、負荷された荷重とこの
荷重に対する反力とがほぼ同一軸に位置するよう構成し
たことを特徴とするロバーバル機構又はロードセル用起
歪体として利用可能なブロックの取付構造。Attachment of a block which cantileverly supports an integrated block formed to be used as a roberval mechanism or as a strain cell for a load cell, and provided with a member for transmitting a load to the block. In structure
The support member for supporting the block includes a mounting portion fixed to a side edge of the block, and a fixing portion for horizontally supporting the block mounted on the mounting portion, and a load transmitting member for transmitting a load to the block is provided. It has a mounting portion attached to the side edge of the block opposite to the side edge on the support member mounting side, and a load receiving portion located in parallel with the main body of the support member via the block, and the load of the load transmitting member is provided. A member that directly receives a load such as a weighing pan is connected to the receiving portion, and the supporting member and the load transmitting member are formed substantially point-symmetrically with a point located at a substantially central portion of the block as a point of symmetry, and the load applied is A block mounting structure which can be used as a roberval mechanism or a load cell strain generating element, wherein a reaction force against the load is located on substantially the same axis.
部と、固定部或いは荷重受け部とがほぼ直交するよう側
面略「Ｌ」字型で、ほぼ同形、同大に形成され、かつ支
持部材は「Ｌ」字の位置に、また荷重伝達部材は逆
「Ｌ」字の位置となるようブロックに対してそれぞれ取
り付けられていることを特徴とする請求項１記載のロバ
ーバル機構又はロードセル用起歪体として利用可能なブ
ロックの取付構造。2. The supporting member and the load transmitting member each have a substantially L-shaped side surface so that the mounting portion and the fixed portion or the load receiving portion are substantially orthogonal to each other, and are formed to have substantially the same shape and size. 2. A roberval mechanism or a load cell elevator according to claim 1, wherein the member is attached to the block so as to be in an "L" position and the load transmitting member is in an inverted "L" position. Block mounting structure that can be used as a distorted body.
一方には、取付部と固定部或いは荷重受け部との接合部
を中心に補強部が形成されていることを特徴とする請求
項１又は２記載のロバーバル機構又はロードセル用起歪
体として利用可能なブロックの取付構造。3. A reinforcing member is formed on at least one of the support member and the load transmitting member around a joint between the mounting portion and the fixed portion or the load receiving portion. A mounting structure for a block that can be used as the described Roberval mechanism or the strain body for a load cell.
伝達部材の取付部と荷重受け部との接合部のうち、これ
ら接合部の少なくとも一方の接合部には取付部と固定
部、或いは取付部と荷重伝達部との間に補強梁部が差し
渡し形成されていることを特徴とする請求項３記載のロ
バーバル機構又はロードセル用起歪体として利用可能な
ブロックの取付構造。4. A mounting part and a fixing part, or a bonding part between a mounting part and a fixing part of a support member or a bonding part between a mounting part and a load receiving part of a load transmitting member. 4. The mounting structure of a block usable as a roberval mechanism or a load cell flexure element according to claim 3, wherein a reinforcing beam portion is formed between the mounting portion and the load transmitting portion.
外側部には補強部として膨出部が形成されていることを
特徴とする請求項４記載のロバーバル機構又はロードセ
ル用起歪体として利用可能なブロックの取付構造。5. The flexure element for a roberval mechanism or a load cell according to claim 4, wherein a bulging portion is formed as a reinforcing portion on an outer portion of the mounting portion facing the forming portion of the reinforcing beam portion. Block mounting structure that can be used as.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26311099A JP2001083024A (en) | 1999-09-17 | 1999-09-17 | Fitting structure for block which is capable of use as roverval mechanism or load cell strain generator |
| US09/535,404 US6472618B1 (en) | 1999-03-30 | 2000-03-27 | Electronic weighing scale using general purpose block member |
| DE10015311A DE10015311B4 (en) | 1999-03-30 | 2000-03-28 | Electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26311099A JP2001083024A (en) | 1999-09-17 | 1999-09-17 | Fitting structure for block which is capable of use as roverval mechanism or load cell strain generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001083024A true JP2001083024A (en) | 2001-03-30 |
Family
ID=17384976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26311099A Pending JP2001083024A (en) | 1999-03-30 | 1999-09-17 | Fitting structure for block which is capable of use as roverval mechanism or load cell strain generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001083024A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008309719A (en) * | 2007-06-15 | 2008-12-25 | Tanita Corp | Load cell strain body, load cell and weight measuring device using load cell strain body, and method for producing load cell strain body |
| JP2012013465A (en) * | 2010-06-29 | 2012-01-19 | Shinko Denshi Kk | Electromagnetic force balanced weighing device |
| KR20160093455A (en) * | 2015-01-29 | 2016-08-08 | 김영수 | Accessory for load cell |
| JP2018505409A (en) * | 2015-01-19 | 2018-02-22 | インペリアル・イノベ−ションズ・リミテッド | Force measurement mechanism |
| JP2018072121A (en) * | 2016-10-28 | 2018-05-10 | セイコーエプソン株式会社 | Force detection sensor, force sensor, and robot |
-
1999
- 1999-09-17 JP JP26311099A patent/JP2001083024A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008309719A (en) * | 2007-06-15 | 2008-12-25 | Tanita Corp | Load cell strain body, load cell and weight measuring device using load cell strain body, and method for producing load cell strain body |
| JP2012013465A (en) * | 2010-06-29 | 2012-01-19 | Shinko Denshi Kk | Electromagnetic force balanced weighing device |
| JP2018505409A (en) * | 2015-01-19 | 2018-02-22 | インペリアル・イノベ−ションズ・リミテッド | Force measurement mechanism |
| KR20160093455A (en) * | 2015-01-29 | 2016-08-08 | 김영수 | Accessory for load cell |
| KR101670159B1 (en) | 2015-01-29 | 2016-10-27 | 김영수 | Accessory for load cell |
| JP2018072121A (en) * | 2016-10-28 | 2018-05-10 | セイコーエプソン株式会社 | Force detection sensor, force sensor, and robot |
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