JPH027006B2 - - Google Patents
Info
- Publication number
- JPH027006B2 JPH027006B2 JP11565985A JP11565985A JPH027006B2 JP H027006 B2 JPH027006 B2 JP H027006B2 JP 11565985 A JP11565985 A JP 11565985A JP 11565985 A JP11565985 A JP 11565985A JP H027006 B2 JPH027006 B2 JP H027006B2
- Authority
- JP
- Japan
- Prior art keywords
- leaf spring
- fulcrum
- present
- contact plates
- leaf
- 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
- 238000005259 measurement Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Springs (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明ははかり、例えばロバーバル機構を採用
するはかりの支点（刃、刃受に相当）用板ばね装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a leaf spring device for a fulcrum (equivalent to a blade or blade holder) of a scale, for example, a scale employing a Roberval mechanism.
第５図は支点として板ばねを用いるはかりの従
来例を示すもので、１は天秤、２は固定部、３は
天秤から両外側に突出している腕、４は一対の板
ばねである。両板ばね４の上端部はボルト６によ
り固定部２に固定され、下端部はボルト６により
腕３に固定されて天秤１を支持している。重点部
５に荷重が働らくと板ばね４のたわみにより天秤
１が傾動するのであるが、この場合、板ばね４の
たわみ、すなわち曲げの態様は荷重の大きさや
かゝり方によつて変動し、一定ではない。これで
は測定精度が低下する。
FIG. 5 shows a conventional scale using a leaf spring as a fulcrum, in which 1 is a balance, 2 is a fixed part, 3 is an arm projecting outward from the balance, and 4 is a pair of leaf springs. The upper ends of both leaf springs 4 are fixed to the fixed part 2 with bolts 6, and the lower ends are fixed to the arm 3 with bolts 6 to support the balance 1. When a load is applied to the important point 5, the balance 1 tilts due to the deflection of the leaf spring 4. In this case, the deflection of the leaf spring 4, that is, the mode of bending, varies depending on the magnitude of the load and the way it bends. , not constant. This reduces measurement accuracy.
第６図及び第７図は第５図における板ばね４の
詳細を示すものであるが（取付ボルト６は図示省
略）、上端部及び下端部には固定部２及び腕３へ
の取付孔４ａ，４ｂが形成されている。板ばね４
の厚みはｔで両端部間のｌの長さの部分が支点と
して働らき、この間で変動する。すなわち測定精
度は一定しない。もしくは低下する。 6 and 7 show details of the leaf spring 4 in FIG. 5 (the mounting bolt 6 is omitted), and the upper and lower ends have mounting holes 4a for the fixing part 2 and the arm 3. , 4b are formed. Leaf spring 4
The thickness of t is t, and the portion of length 1 between the two ends acts as a fulcrum, and varies between the two ends. In other words, measurement accuracy is not constant. Or decrease.
これに対処するために板ばねを第８図及び第９
図に示すような形状にすることが提案されてい
る。すなわち板ばね７の中心部分で厚さを小さく
t′としている。上端部及び下端部の丸穴７ａ，７
ｂはボルトにより上述のような固定部２及び腕３
にこの板ばね７を固定させるためのものである
が、このような板ばね７によれば、常に曲げの起
点（長さl′内にある）は最も曲がりやすい部分７
ｃで一定となり、測定精度は向上するのである
が、加工々程数が多く、加工作業も面倒である。 To deal with this, leaf springs are used as shown in Figures 8 and 9.
It has been proposed to have a shape as shown in the figure. In other words, the thickness is reduced at the center of the leaf spring 7.
It is set as t′. Round holes 7a, 7 at the upper and lower ends
b is the fixing part 2 and arm 3 as described above with bolts.
According to such a leaf spring 7, the starting point of bending (within length l') is always at the part 7 that is most easily bent.
It becomes constant at c, and the measurement accuracy improves, but the number of machining operations is large and the machining work is troublesome.
本発明は上記問題に鑑みてなされ測定精度を向
上させながら、加工が従来より簡単なはかりにお
ける支点用板ばね装置を提供することを目的とす
る。
The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a leaf spring device for a fulcrum in a scale that is easier to process than the conventional one while improving measurement accuracy.
上記目的は、板ばねの上端側及び下端側をそれ
ぞれ一対の当板間に挾持させ、これら両対の当板
間に支点となるべき帯状領域の前記板ばね部分を
露出させたことを特徴とするはかりにおける支点
用板ばね装置、によつて達成される。
The above object is characterized in that the upper end side and the lower end side of the leaf spring are respectively held between a pair of backing plates, and the part of the leaf spring in the band-shaped area that is to serve as a fulcrum is exposed between these pairs of backing plates. This is achieved by a leaf spring device for the fulcrum in the scale.
板ばねの露出帯状領域が支点として働らき測定
精度は一定で向上させることができる。また当板
の長さ、または取付位置を変えることによつて測
定精度もしくは感度を調整することができる。取
付孔を除いて板ばねには何ら加工を施す必要がな
く、当板は任意の厚さでよく適当な剛性さえあれ
ば板ばね材質以外の材質で形成してもよいので従
来よりは加工が簡単となる。
The exposed band-shaped region of the leaf spring acts as a fulcrum, and the measurement accuracy can be improved at a constant level. Furthermore, measurement accuracy or sensitivity can be adjusted by changing the length of the contact plate or the mounting position. There is no need to perform any processing on the leaf spring except for the mounting holes, and the backing plate can be made of any thickness and may be made of a material other than the leaf spring material as long as it has the appropriate rigidity, so processing is easier than before. It becomes easy.
以下、本発明の各実施例による支点用板ばね装
置について第１図〜第４図を参照して説明する。
Hereinafter, a leaf spring device for a fulcrum according to each embodiment of the present invention will be described with reference to FIGS. 1 to 4.
第１図及び第２図は本発明の第１実施例を示す
が、図において板ばね装置は全体として１０で示
され、第５図に示すようなはかりに適用されるも
のとする。固定部２、腕３に取付けるためのボル
トは図示省略の他図についても同様。 1 and 2 show a first embodiment of the present invention, in which the leaf spring device is designated as a whole by 10 and is applied to a scale as shown in FIG. 5. Bolts for attaching to the fixed part 2 and arm 3 are omitted, but the same applies to other figures.
板ばね１１の上端側及び下端側はそれぞれ一対
の当板１２，１３及び１４，１５で挾持され、こ
れらにはそれぞれ取付ボルト挿通用孔１２ａ〜１
５ａが形成されている。これらに整列するように
板ばね１１の上端部及び下端部にもボルト挿通用
孔１１ａ，１１ｂが形成されている。両対の当板
１２，１３と１４，１５との間には隙間l1がおか
れるが、この帯状の板ばね１１の露出部分１１ｃ
が支点として働らく。当板１２〜１５の内端部は
テーパ面１２ｂ〜１５ｂとされ、板ばね１１の支
点部分１１ｃでの曲げ抵抗を小さいものとしてい
る。板ばね１１の厚さt1は充分に小さく、第８図
に示す従来例の板ばね７の減肉部分７ｃの厚さ
t′にほゞ等しい。 The upper end side and the lower end side of the leaf spring 11 are respectively held between a pair of contact plates 12, 13 and 14, 15, and these are provided with mounting bolt insertion holes 12a to 1, respectively.
5a is formed. Bolt insertion holes 11a and 11b are also formed in the upper and lower ends of the leaf spring 11 so as to be aligned therewith. A gap l 1 is provided between the two pairs of contact plates 12, 13 and 14, 15, and the exposed portion 11c of the strip-shaped leaf spring 11
serves as a fulcrum. The inner end portions of the contact plates 12 to 15 have tapered surfaces 12b to 15b to reduce the bending resistance at the fulcrum portion 11c of the leaf spring 11. The thickness t1 of the leaf spring 11 is sufficiently small, and the thickness of the thinned portion 7c of the conventional leaf spring 7 shown in FIG.
approximately equal to t′.
本発明の第１実施例は以上のように構成される
が、次にこの作用効果などについて説明する。 The first embodiment of the present invention is constructed as described above, and its effects will now be explained.
本実施例は第５図に示すはかりに適用され、板
ばね４の代わりに用いられるのであるが重点部５
に荷重をかけると板ばね装置１０は常に露出部分
１１ｃで曲がり、一定の感度で精度良く計重する
ことができる。 This embodiment is applied to the scale shown in FIG. 5, and the important point 5 is used instead of the leaf spring 4.
When a load is applied to the plate spring device 10, the exposed portion 11c always bends, allowing accurate weighing with constant sensitivity.
感度もしくは精度は当板１２〜１５の長さを変
えること、すなわち板ばね１１の露出部分１１ｃ
の長さl1を変えることによつて容易に調整するこ
とができる。勿論、同一の当板１２〜１５を用
い、孔１２ａ〜１５ａの範囲内で上下にずらせて
調整するようにしてもよい。いづれにしても板ば
ね１１には何らの加工も施す必要はない。当板１
２〜１５の材質も厚さ及び剛性を考慮すれば種々
の材質が適用可能であり、例えばFRPを用いる
ようにしてもよい。この場合、加工のしやすい材
質を選定すればよい。 Sensitivity or accuracy can be determined by changing the length of the contact plates 12 to 15, that is, by changing the length of the exposed portion 11c of the leaf spring 11.
can be easily adjusted by changing the length l1 . Of course, the same backing plates 12 to 15 may be used and the adjustment may be made by shifting them up and down within the range of the holes 12a to 15a. In any case, it is not necessary to perform any processing on the leaf spring 11. Toban 1
Various materials can be used for materials Nos. 2 to 15 in consideration of thickness and rigidity; for example, FRP may be used. In this case, a material that is easy to process may be selected.
第３図及び第４図は本発明の第２実施例を示す
が、支点用板ばね装置は全体として２０で示さ
れ、この場合には板ばね２５を挾持する当板２
１，２２及び２３，２４の凹凸係合により板ばね
２５の支点領域は更に確実に一定のものとされ
る。 FIGS. 3 and 4 show a second embodiment of the invention, in which the fulcrum leaf spring device is designated as a whole by 20, and in this case a contact plate 2 that clamps a leaf spring 25 is shown in FIGS.
1, 22 and 23, 24, the fulcrum area of the leaf spring 25 is more reliably kept constant.
一方の当板２１，２３にはそれぞれ一対の突部
２１ａ，２１ｂ及び２３ａ，２３ｂが形成され、
これらは板ばね２５の丸孔２５ｃ，２５ｄ，２５
ｅ，２５ｆを挿通して、他方の当板２２，２４の
凹部２２ａ，２２ｂ，２４ａ，２４ｂに嵌め込ま
れる。 A pair of protrusions 21a, 21b and 23a, 23b are formed on one of the contact plates 21, 23, respectively.
These are the round holes 25c, 25d, 25 of the leaf spring 25.
e, 25f and are fitted into the recesses 22a, 22b, 24a, 24b of the other contact plates 22, 24.
突部２１ａ，２１ｂ間及び２３ａ，２３ｂ間に
は第３図で点線で示すように当板２１，２２，２
３，２４に板ばね２５の取付孔２５ａ，２５ｂに
整列してボルト挿通孔が形成されている。 Between the protrusions 21a and 21b and between 23a and 23b, there are contact plates 21, 22, 2 as shown by dotted lines in FIG.
Bolt insertion holes are formed in 3 and 24 in alignment with the mounting holes 25a and 25b of the leaf spring 25.
突部２１ａ，２１ｂ，２３ａ，２３ｂと凹部２
２ａ，２２ｂ，２４ａ，２４ｂとの係合により板
ばね２５は当板２１〜２４に対し常に一定の位置
関係で取り付けることができる。すなわち確実に
板ばね２５の長手方向に所定の巾l2の支点領域２
５ｇが形成され、精度を更に向上させることがで
きる。 Projections 21a, 21b, 23a, 23b and recess 2
2a, 22b, 24a, and 24b, the leaf spring 25 can always be attached to the contact plates 21 to 24 in a constant positional relationship. In other words, the fulcrum region 2 of the predetermined width l 2 in the longitudinal direction of the leaf spring 25 is ensured.
5g is formed, which can further improve accuracy.
なお、この場合においても板ばね２５には孔２
５ａ〜２５ｆを形成するだけでよく、厚さt2の薄
い板ばね２５を用いるだけで何らの減肉加工を施
すことなく所定の感度を得ることができる。 In this case as well, the leaf spring 25 has a hole 2.
5a to 25f, and by simply using a thin leaf spring 25 with a thickness t2 , a predetermined sensitivity can be obtained without any thinning process.
以上、本発明の各実施例について説明したが、
勿論、本発明はこれらに限定されることなく、本
発明の技術的思想に基づいて種々の変形が可能で
ある。 Although each embodiment of the present invention has been described above,
Of course, the present invention is not limited to these, and various modifications can be made based on the technical idea of the present invention.
例えば、以上の実施例では板ばね１１，２５の
両側縁部に切欠部を形成して両端部間の巾を小さ
くしているが、切欠部を形成せず単に長方形状の
板ばねを用いるようにしてもよい。 For example, in the above embodiment, notches are formed on both side edges of the leaf springs 11 and 25 to reduce the width between the two ends, but it is possible to simply use a rectangular leaf spring without forming the notches. You may also do so.
また当板１２〜１５の断面形状はテーパ面１２
ｂ〜１５ｂを形成して台形状としたが、これに代
えて長方形状としてもよい。 In addition, the cross-sectional shape of the contact plates 12 to 15 is a tapered surface 12.
b to 15b are formed to have a trapezoidal shape, but it may be replaced with a rectangular shape.
以上述べたように本発明の支点用板ばね装置に
よれば従来に比べて加工が簡単であり、しかも感
度もしくは精度の調整を容易に行うことができ
る。
As described above, the fulcrum leaf spring device of the present invention is easier to process than conventional devices, and sensitivity or accuracy can be easily adjusted.
第１図は本発明の第１実施例の支点用板ばね装
置の側面図、第２図は第１図における−線方
向断面図、第３図は本発明の第２実施例の支点用
板ばね装置の断面側面図、第４図は第３図におけ
る−線方向断面図、第５図は本発明の支点用
板ばね装置の適用可能な従来例を示すはかりの要
部の斜視図、第６図は第５図における板ばねの側
面図、第７図は同正面図、第８図は板ばねの他従
来例の側面図及び第９図は同正面図である。
なお図において、１０，２０…支点用板ばね装
置、１１ｃ，２５ｇ…露出板ばね部分、１１，２
５…板ばね、１２〜１５，２１〜２４…当板。
FIG. 1 is a side view of a fulcrum plate spring device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view along the - line in FIG. 1, and FIG. 3 is a fulcrum plate according to a second embodiment of the present invention. 4 is a cross-sectional side view of the spring device; FIG. 4 is a cross-sectional view along the - line in FIG. 3; FIG. 6 is a side view of the leaf spring shown in FIG. 5, FIG. 7 is a front view thereof, FIG. 8 is a side view of another conventional example of the leaf spring, and FIG. 9 is a front view thereof. In the figure, 10, 20...Fullin leaf spring device, 11c, 25g...Exposed leaf spring portion, 11,2
5...Plate spring, 12-15, 21-24...Plate.
Claims (1)
当板間に挾持させ、これら両対の当板間に支点と
なるべき帯状領域の前記板ばね部分を露出させた
ことを特徴とするはかりにおける支点用板ばね装
置。1. A scale characterized in that the upper end side and the lower end side of the leaf spring are each held between a pair of backing plates, and the part of the leaf spring in the band-shaped area that is to serve as a fulcrum is exposed between the two pairs of backing plates. Leaf spring device for fulcrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11565985A JPS61272615A (en) | 1985-05-29 | 1985-05-29 | Plate spring device for fulcrum of balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11565985A JPS61272615A (en) | 1985-05-29 | 1985-05-29 | Plate spring device for fulcrum of balance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61272615A JPS61272615A (en) | 1986-12-02 |
| JPH027006B2 true JPH027006B2 (en) | 1990-02-15 |
Family
ID=14668119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11565985A Granted JPS61272615A (en) | 1985-05-29 | 1985-05-29 | Plate spring device for fulcrum of balance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61272615A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8926171B2 (en) * | 2009-04-29 | 2015-01-06 | Waters Technologies Corporation | Simultaneous differential thermal analysis system |
-
1985
- 1985-05-29 JP JP11565985A patent/JPS61272615A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61272615A (en) | 1986-12-02 |
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