JPS6255083B2 - - Google Patents
Info
- Publication number
- JPS6255083B2 JPS6255083B2 JP8629980A JP8629980A JPS6255083B2 JP S6255083 B2 JPS6255083 B2 JP S6255083B2 JP 8629980 A JP8629980 A JP 8629980A JP 8629980 A JP8629980 A JP 8629980A JP S6255083 B2 JPS6255083 B2 JP S6255083B2
- Authority
- JP
- Japan
- Prior art keywords
- base plate
- displacement
- springs
- spring
- scale
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000008602 contraction Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/02—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a helical spring
- G01G3/04—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a helical spring using a plurality of springs
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
【発明の詳細な説明】 本発明ははかりに関する。[Detailed description of the invention] The present invention relates to a scale.
従来、はかりには種々の型式のものがあるが、
例えばばねを利用したてこ式のはかりがある。こ
のてこ式のはかりとしては、例えばヘルスメータ
（体重計）があるが、構造が複雑であるばかり
か、摩擦部分があつて、この部分ははかりの使用
と共に摩耗する。これにより、がたが生じたり、
測定精度が低下したりする。また組立も困難であ
る。 Conventionally, there are various types of scales,
For example, there are lever-type scales that use springs. An example of such a lever-type scale is a health meter (weight scale), but it not only has a complicated structure but also has a frictional part that wears out as the scale is used. This may cause rattling or
Measurement accuracy may decrease. It is also difficult to assemble.
本発明は上述の点に鑑みてなされたもので、構
造が簡単な全く新規なはかりを提供することを目
的とする。この目的は、本発明によれば、秤量す
べき品物をのせる台板、この台板をその下面で直
接支持し、相互に等しいばね常数を有する複数の
コイルばね、及びこれらの複数のコイルばねの中
心位置に対応して前記台板の変位を検出するため
に設けられた台板変位検出器から成り、前記台板
は前記複数のコイルばねによつてのみ支持し、こ
れらコイルばねのたわみによる前記台板の変位を
前記変位検出器により検出するようにしたはか
り、によつて達成される。 The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a completely new scale with a simple structure. This purpose, according to the invention, consists of a base plate on which the items to be weighed are placed, a plurality of coil springs directly supporting this base plate on its underside and having mutually equal spring constants; the base plate is supported only by the plurality of coil springs, and the base plate is supported only by the plurality of coil springs, and the base plate is supported only by the plurality of coil springs, and This is achieved by a scale in which the displacement of the base plate is detected by the displacement detector.
以下、本発明の詳細につき、図面を参照して説
明する。 Hereinafter, details of the present invention will be explained with reference to the drawings.
第１図は本発明の第１実施例によるはかりの概
略正面図であるが、図において台板１は左右一対
のコイルばね２，３により、基礎４上に安定に支
持されている。図示せずともコイルばね２，３は
ばね座を介して、台板１に対しても、基礎４に対
しても安定に保持されるものとする。これら
のばね２，３は相等しいばね常数ｋを有し、台板
１を安定に支持するだけの巻径を有している。 FIG. 1 is a schematic front view of a scale according to a first embodiment of the present invention. In the figure, a base plate 1 is stably supported on a foundation 4 by a pair of left and right coil springs 2, 3. It is assumed that the coil springs 2 and 3 are stably held on both the base plate 1 and the foundation 4 via spring seats, even though they are not shown. These springs 2 and 3 have the same spring constant k and have a winding diameter sufficient to stably support the base plate 1.
台板１の中央部０下方には変位検出器としての
差動トランス５が設けられている。差動トランス
５は公知の構造を有し、鉄心６および一次、二次
コイル７から成つており、鉄心６は台板１の下面
の中央部に固定され、これに対応してばね２と３
の中心位置に一次、二次コイル７が配置されてい
る。図示せずとも一次、二次コイル７は基礎４に
対し固定されており、これに鉄心６が挿通可能な
構成となつている。 A differential transformer 5 as a displacement detector is provided below the central portion 0 of the base plate 1. The differential transformer 5 has a known structure and consists of an iron core 6 and primary and secondary coils 7. The iron core 6 is fixed to the center of the lower surface of the base plate 1, and springs 2 and 3 are connected to the core 6.
The primary and secondary coils 7 are arranged at the center of. Although not shown, the primary and secondary coils 7 are fixed to the foundation 4, and are configured such that the iron core 6 can be inserted therethrough.
今、品物Ｗを台板１の中央部Ｏにのせれば（こ
の状態を一点鎖線で示す）、ばね２，３は等しい
量ａだけ縮む。すなわち、品物Ｗの重量がＷとす
れば、ａ＝Ｗ／2kだけ縮む。これにより、台板１が
下方へａだけ変位し、台板１に固定された鉄心６
がそれだけ一次、二次コイル７内により深く入り
込む。これにより、公知のように二次コイル７に
電圧変化が生じ、電圧−変位の較正をしておけ
ば、直ちに品物の重量Ｗが検知することができ
る。 Now, if the article W is placed on the center O of the base plate 1 (this state is shown by the dashed line), the springs 2 and 3 will be compressed by the same amount a. That is, if the weight of the item W is W, it will shrink by a=W/2k. As a result, the base plate 1 is displaced downward by an amount a, and the iron core 6 fixed to the base plate 1 is
penetrates deeper into the primary and secondary coils 7. This causes a voltage change in the secondary coil 7 as is well known, and if the voltage-displacement is calibrated, the weight W of the item can be detected immediately.
第２図は、簡略化のために第１図の差動トラン
ス５を省略して示し、品物Ｗを台板１の左端部、
すなわち一方のばね２の上方にのせた場合を示す
ものであるが、この場合にはばね２はＷ／Ｋ＝2aだけ
縮むが、他方のばね１は殆んど縮まない。従つて
台板１の中央部０は０＋2a／２＝ａだけ下方に変位す
る。すなわち、品物Ｗを台板１の左端部にのせて
も、台板１の中央部０の変位は中央部０にのせた
場合と同じである。 In FIG. 2, the differential transformer 5 in FIG. 1 is omitted for the sake of simplicity, and the item W is shown at the left end of the base plate 1,
That is, the case is shown in which the spring 2 is placed above one of the springs 2. In this case, the spring 2 is compressed by W/K=2a, but the other spring 1 is hardly compressed. Therefore, the central portion 0 of the base plate 1 is displaced downward by 0+2a/2=a. That is, even if the article W is placed on the left end of the base plate 1, the displacement of the center portion 0 of the base plate 1 is the same as when it is placed on the center portion 0.
第３図は更に品物Ｗを他の位置にのせた場合を
原理的に示す。台板１に品物Ｗをのせない状態を
一点鎖線で、品物Ｗをのせた状態を実線で示す、
それぞれにおいて、中心位置、ばね２，３の支持
点を×及び○で表わすものとする。今、ばね２，
３の支持点間をｍ：ｎの比に分つ位置に品物Ｗを
のせたとすれば、ばね２に加わる荷重Ｘ＝ｎ／ｍ＋ｎ
Ｗであり、他方のばね３に加わる荷重Ｙ＝ｍ／ｍ＋ｎ
Ｗである。従つて、ばね２の縮み量Ａ＝ｎＷ／（ｍ＋ｎ
）ｋ
であり、他方のばね３の縮み量Ｂ＝ｍＷ／（ｍ＋ｎ）ｋ
であ
る。従つて台板１の中央部０の変位量＝Ａ＋Ｂ／２＝
Ｗ／2k＝ａとなり、品物Ｗを台板１のどの位置にの
せても、中央部０の変位の大きさは変わらないこ
とがわかる。 FIG. 3 further shows the principle of the case where the article W is placed in another position. The state where the item W is not placed on the base plate 1 is shown by a dashed line, and the state where the item W is placed on the base plate 1 is shown by a solid line.
In each case, the center position and the support points of the springs 2 and 3 are indicated by × and ○. Now spring 2,
If the item W is placed at a position that divides the support points of 3 into a ratio of m:n, then the load applied to the spring 2 is X=n/m+n
W, and the load applied to the other spring 3 is Y=m/m+n
It is W. Therefore, the amount of contraction A=nW/(m+n
)k
and the amount of contraction of the other spring 3 B=mW/(m+n)k
It is. Therefore, the amount of displacement of the center portion 0 of the base plate 1 = A + B / 2 =
W/2k=a, and it can be seen that no matter where the item W is placed on the base plate 1, the magnitude of the displacement of the central portion 0 does not change.
なお、第１図、第２図及び第３図において説明
をわかりやすくするために台板１の変位及び傾斜
を誘張して示したが、実際にはこれらはわずかで
よく、従つて変位計５における鉄心６の傾斜によ
るコイル７に対する角度変位については問題はな
い。たとえ、傾斜を考慮するとしても、鉄心６と
コイル７との間の空隙は平均化すれば、傾斜しな
い場合と同じになるので問題はない。 In addition, although the displacement and inclination of the base plate 1 are shown as induced in FIGS. 1, 2, and 3 to make the explanation easier to understand, in reality, these may be small, and therefore There is no problem with respect to the angular displacement with respect to the coil 7 due to the inclination of the iron core 6 in 5. Even if the inclination is taken into account, there is no problem because the gap between the iron core 6 and the coil 7 is averaged and becomes the same as in the case where there is no inclination.
第４図は本発明の第２実施例によるはかりの概
略正面図であり、図において第１実施例と対応す
る部分については同一の符号を付し詳細な説明は
省略する。 FIG. 4 is a schematic front view of a scale according to a second embodiment of the present invention, and in the figure, parts corresponding to those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.
本実施例では変位検出器８としては一対の電極
板９，１０が用いられている。すなわち、一方の
電極板９は台板１の中央部下方に固定され、他方
の電極板１０はこれと対向し、所定の距離を隔
てゝ基礎４上に固定されている。図示せずとも、
電極板９，１０はそれぞれ台板１及び基礎４に対
して絶縁した状態で固定されており、静電容量の
変化を測定するため回路に接続されている。すな
わち、此の実施例では台板１の変位により電極板
９，１０の対向面積の変化することを利用して、
これらの間の静電容量の変化から台板１の変位が
検出される。 In this embodiment, a pair of electrode plates 9 and 10 are used as the displacement detector 8. That is, one electrode plate 9 is fixed below the center of the base plate 1, and the other electrode plate 10 is fixed on the foundation 4 facing it and separated by a predetermined distance. Even if not shown,
The electrode plates 9 and 10 are fixed in an insulated manner to the base plate 1 and the foundation 4, respectively, and are connected to a circuit for measuring changes in capacitance. That is, in this embodiment, by utilizing the fact that the facing area of the electrode plates 9 and 10 changes due to the displacement of the base plate 1,
The displacement of the base plate 1 is detected from the change in capacitance between them.
第５図は本発明の第３実施例によるはかりの概
略正面図であり、図において第１実施例と対応す
る部分については同一の符号を付し、詳細な説明
を省略する。 FIG. 5 is a schematic front view of a scale according to a third embodiment of the present invention. In the figure, parts corresponding to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
本実施例による台板１の変位検出器１１はラツ
ク１２、これに係合するピニオン１３及びこの回
転軸に固定された指針１４から成つている。すな
わち、ラツク１２は台板１の中央部下方に固定さ
れ、ピニオン１３は基礎４に対し回動可能に支持
された軸に固定されている。この軸に指針１４が
固定されており、台紙１の変位と共にピニオン１
３が回転すると、この回転角が変位に比例するの
で、直接指針１４によつて変位、すなわち台板１
上にのせた品物の重量を知ることができる。 The displacement detector 11 of the base plate 1 according to this embodiment consists of a rack 12, a pinion 13 engaged with the rack 12, and a pointer 14 fixed to the rotating shaft. That is, the rack 12 is fixed below the center of the base plate 1, and the pinion 13 is fixed to a shaft rotatably supported on the base 4. A pointer 14 is fixed to this shaft, and as the mount 1 moves, the pinion 1
3 rotates, this rotation angle is proportional to the displacement, so the displacement, that is, the base plate 1, can be directly controlled by the pointer 14.
You can know the weight of items placed on top.
第６図は本発明の第４実施例によるはかりの平
面図である。本実施例では台板１５は４個のばね
常数の相等しいばね１６，１７，１８，１９によ
つて基礎上に支持されている。これらのばね１６
〜１９は台板１５の四隅に配置され、これらの中
央部に対応して台板１５の中央０の下方には上述
の実施例で示したいづれかの変位検出器が設けら
れているものとする。 FIG. 6 is a plan view of a scale according to a fourth embodiment of the present invention. In this embodiment, the base plate 15 is supported on the foundation by four springs 16, 17, 18, and 19 having equal spring constants. These springs 16
- 19 are placed at the four corners of the base plate 15, and one of the displacement detectors shown in the above-mentioned embodiments is provided below the center 0 of the base plate 15 in correspondence with these central parts. .
本実施例においても、Ｘ−Ｘ線上又はＹ−Ｙ線
上に品物Ｗをのせた場合は上述の実施例と全く同
じ作用を示すことは明らかであるが、今、仮に台
板１５上の点Ｐの位置に品物Ｗをのせた場合につ
き考察してみる。 It is clear that this embodiment also exhibits exactly the same effect as the above-mentioned embodiment when the article W is placed on the X-X line or the Y-Y line. Let us consider the case where the item W is placed at the position.
すなわち、品物Ｗの重量による力の作用点をＰ
とすれば、ばね１６，１７の中心を結ぶ線と点Ｐ
を通りＸ−Ｘに平行な線との交点P1、及びばね１
８，１９の中心を結ぶ線と点Ｐを通りＸ−Ｘに平
行な線との交点P2における力の配分は次のように
なる。 In other words, the point of action of the force due to the weight of the item W is P
Then, the line connecting the centers of springs 16 and 17 and the point P
Intersection point P 1 with a line parallel to X-X, and spring 1
The distribution of force at the intersection point P2 between the line connecting the centers of 8 and 19 and the line passing through point P and parallel to X-X is as follows.
点P1における力W1＝n1／m1＋n1・Ｗ、及び
点P2における力W2＝m1／m1＋n1・Ｗ
従つてこれからの力W1、W2によるばね１６〜１
９の縮み量は次のようになる。すなわちそれぞれ
のばね常数をｋとすれば、
ばね１６の縮み量a1＝n1n2／（m1＋n1）（m2＋n2）・
Ｗ／ｋ
ばね１７の縮み量a2＝n1m2／（m1＋n1）（m2＋n2）・
Ｗ／ｋ
ばね１８の縮み量a3＝m1n2／（m1＋n1）（m2＋n2）・
Ｗ／ｋ
ばね１９の縮み量a4＝m1m2／（m1＋n1）（m2＋n2）・
Ｗ／ｋ
従つて、台板１５の中央部０の下方への変位量
ａはa1＋a2＋a3＋a4／４＝Ｗ／4kとなり、中央部Ｏに
品物をのせた場合と同じである。 Force W 1 at point P 1 = n 1 /m 1 + n 1・W, and force W 2 at point P 2 = m 1 /m 1 + n 1・W
Therefore, the springs 16 to 1 due to the future forces W 1 and W 2
The amount of shrinkage of 9 is as follows. In other words, if each spring constant is k, the amount of contraction of the spring 16 is a 1 = n 1 n 2 / (m 1 + n 1 ) (m 2 + n 2 )・
W/k
Amount of contraction of spring 17 a 2 = n 1 m 2 / (m 1 + n 1 ) (m 2 + n 2 )・
W/k
Amount of contraction of the spring 18 a 3 = m 1 n 2 / (m 1 + n 1 ) (m 2 + n 2 )・
W/k
Amount of contraction of spring 19 a 4 = m 1 m 2 / (m 1 + n 1 ) (m 2 + n 2 )・
W/k
Therefore, the amount of downward displacement a of the central portion 0 of the base plate 15 is a 1 +a 2 +a 3 +a 4 /4=W/4k, which is the same as when an article is placed on the central portion O.
以上述べたように、第６図のはかりにおいても
品物を台板１５上のいづれの位置においても、台
板１５の中央部０は一定量変位する。従つて常に
品物の重量を正確にはかることができる。 As described above, in the scale shown in FIG. 6 as well, no matter where the item is placed on the base plate 15, the central portion 0 of the base plate 15 is displaced by a constant amount. Therefore, the weight of the item can always be accurately measured.
以上、本発明の各実施例について説明したが、
勿論、本発明はこれら実施例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。 Each embodiment of the present invention has been described above, but
Of course, the present invention is not limited to these embodiments, and various modifications can be made based on the technical idea of the present invention.
例えば、上述の実施例では種々の変位検出器を
示したが、これらに限ることなく、更に種々の変
位検出器の適用が可能である。例えば、変位によ
つて受光量の変わる光学的検出手段なども適用可
能である。 For example, although various displacement detectors are shown in the above embodiments, the present invention is not limited to these, and various other displacement detectors can be applied. For example, optical detection means that changes the amount of received light depending on displacement can also be applied.
又、台板を支持するばねの個数も、２個及び４
個に限定されることなく、任意の複数個のばねで
支持して、上述の効果が得られることは明らかで
ある。 Also, the number of springs supporting the base plate is 2 and 4.
It is clear that the above effect can be obtained by supporting any number of springs without being limited to the number of springs.
以上述べたように本発明によるはかりは複雑な
ロバーバル機構を用いたものではなく構造が極め
て簡単であり、組み立ても容易であり、従来のヘ
ルスメータのように摩擦部分がないので長寿命を
保証するなど種々の効果を奏するものである。 As mentioned above, the scale according to the present invention does not use a complicated Roberval mechanism, but has an extremely simple structure, is easy to assemble, and has no frictional parts like conventional health meters, so it guarantees a long life. It has various effects such as.
第１図は本発明の第１実施例によるはかりの概
略正面図、第２図は同はかりの作用を説明するた
めの一部省略した概略正面図、第３図は更に同は
かりの作用を説明するための線図、第４図は本発
明の第２実施例によるはかりの概略正面図、第５
図は本発明の第３実施例によるはかりの概略正面
図及び第６図は本発明の第４実施例によるはかり
の平面図である。
なお、図において、１，１５……台板、２，
３，１６，１７，１８，１９……ばね、５，８，
１１……変位検出器。
Fig. 1 is a schematic front view of a scale according to the first embodiment of the present invention, Fig. 2 is a partially omitted schematic front view to explain the function of the scale, and Fig. 3 further explains the function of the scale. FIG. 4 is a schematic front view of a scale according to the second embodiment of the present invention, and FIG.
The figure is a schematic front view of a scale according to a third embodiment of the present invention, and FIG. 6 is a plan view of a scale according to a fourth embodiment of the present invention. In addition, in the figure, 1, 15... base plate, 2,
3, 16, 17, 18, 19... spring, 5, 8,
11...Displacement detector.
Claims (1)
の下面で直接支持し、相互に等しいばね常数を有
する複数のコイルばね、及びこれらの複数のコイ
ルばねの中心位置に対応して前記台板の変位を検
出するために設けられた台板変位検出器から成
り、前記台板は前記複数のコイルばねによつての
み支持し、これらコイルばねのたわみによる前記
台板の変位を前記変位検出器により検出するよう
にしたはかり。1. A base plate on which the item to be weighed is placed, a plurality of coil springs that directly support this base plate on its lower surface and have mutually equal spring constants, and The base plate is supported only by the plurality of coil springs, and the displacement detector is configured to detect the displacement of the base plate due to the deflection of these coil springs. A scale that uses a device for detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8629980A JPS5712327A (en) | 1980-06-25 | 1980-06-25 | Balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8629980A JPS5712327A (en) | 1980-06-25 | 1980-06-25 | Balance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5712327A JPS5712327A (en) | 1982-01-22 |
| JPS6255083B2 true JPS6255083B2 (en) | 1987-11-18 |
Family
ID=13882948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8629980A Granted JPS5712327A (en) | 1980-06-25 | 1980-06-25 | Balance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5712327A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62261019A (en) * | 1986-05-07 | 1987-11-13 | Kubota Ltd | Weighing apparatus |
| GB2467522A (en) * | 2009-01-29 | 2010-08-04 | Consortia Products Ltd | Storage crate incorporating a pneumatic weighing device |
-
1980
- 1980-06-25 JP JP8629980A patent/JPS5712327A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5712327A (en) | 1982-01-22 |
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