JP3936791B2 - Inclined dial type rubber hardness tester - Google Patents

Inclined dial type rubber hardness tester Download PDF

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Publication number
JP3936791B2
JP3936791B2 JP03372598A JP3372598A JP3936791B2 JP 3936791 B2 JP3936791 B2 JP 3936791B2 JP 03372598 A JP03372598 A JP 03372598A JP 3372598 A JP3372598 A JP 3372598A JP 3936791 B2 JP3936791 B2 JP 3936791B2
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Prior art keywords
rubber hardness
casing
push needle
scale plate
spindle
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Expired - Fee Related
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JP03372598A
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Japanese (ja)
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JPH11218479A (en
Inventor
好平 明石
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有限会社エラストロン
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Description

【0001】
【発明の属する技術分野】
本発明は携帯型ゴム硬度計の改良に関するものである。
【0002】
【従来の技術】
ゴム硬度計、特にJISK6253等の規格で「デュロメータ」として規定された携帯型のゴム硬度計の本体は、図1Aに示す通りケーシング下端面から突出した押針1を水平面上に置かれたゴム試料面に垂直に押し当て、ゴム硬度に応じた後退寸法をケーシング正面のダイアル2に装備された指針3の回転角に変換するものである。その押針保持及び変位伝達機構は、図1Bに示す通り押針1を保持したスピンドル4の中央部側面にラック5を設置もしくは形成し、これに指針駆動機構(ダイアルゲージ機構)の入力ピニオン6を噛み合わせたものである。なお、スピンドル4の上方にはスプリング7が配置され、これがスピンドル4上端のアタッチメント8を付勢し、ゴム硬度に応じた押針1の後退量を決定するようになっている。
【0003】
上記の構造において、ピニオン6が押針1の延長線上において垂直配置されたラック5と噛み合うためにはその軸が水平配置されねばならず、単純な伝動機構によってこのピニオン6と連動する指針3の軸もまた水平配置されなければならない。この関係において指針3はラック5と同じく垂直面内に位置したダイアル2の目盛板上で動作するものである。なお、ここでいう「垂直」とは相対的意味での垂直ではなく、ゴム硬度計使用上の「水平」に対する「垂直」、従って方位的意味において用いたものである。
【0004】
この垂直面内の目盛板を測定者が正面から見るためには、作業机上のゴム硬度計を押さえつつ椅子から腰を浮かせて中腰や膝をつく姿勢になったり、座ったままでも無理な姿勢をとってゴム硬度計の正面を覗き込まなければならない。
【0005】
【発明が解決しようとする課題】
本発明の目的は、測定者が椅子に座ったままでも目盛板を正面から見ることができるようにしたゴム硬度計を提供することである。
【0006】
【課題を解決するための手段】
上記の目的を達成するため、本発明のゴム硬度計は、a)ケーシング正面において後方に傾斜させた目盛板と、
b)前記目盛板に対して直角な指針軸に回転変位を生じてゴム硬度の指示を行うためのダイアルゲージ機構であって、前記指針軸に平行してケーシング内空間に突出した入力ピニオンを装備したものと、
c)ケーシング下端部の遊合孔を貫通した下向き押針を垂直スピンドルにより支持し、前記押針のゴム加圧用の先端が無負荷時において前記遊合孔から一定寸法だけ突出するように前記垂直スピンドルを常時下向きに付勢するスプリング及び突出制止部を備えた押針保持構造と、
d)前記垂直スピンドルの上部に前記目盛板と平行した傾斜角度で設けられ、かつ、前記入力ピニオンと直接噛合するラックと、を備え、
e)前記ラックが、前記入力ピニオンとの噛合状態を維持しつつ、前記押針先端のケーシング下端からの出没動作に従動して上下動することにより、前記入力ピニオンを回転させるようにしたものである。
【0007】
上記の構造において、目盛板の後方傾斜角度は25°〜35°、なるべくなら30°程度であることが望ましい。そしてダイアルゲージ機構のピニオンは、傾斜角度の正弦に応じた余裕寸法を有し、ゴム硬度に対応した押針の後退を傾斜した目盛板上の指針回転変位として正確に伝達する。これにより、測定者は作業机上のゴム硬度計を操作しつつ腰掛けた自然の姿勢で手元のゴム硬度計目盛板を見ることができる。
【0008】
【発明の実施の形態】
図2は、本発明の一実施例におけるゴム硬度計の側断面を示すもので、ケーシング10の正面上部は、例えば後方に30°傾斜し、この傾斜面内において目盛板11及び指針12を有するダイアル構造13が装備される。ケーシング10内において目盛板11の裏側にはこの板面に対して直角な指針軸14が突入し、この軸14に回転変位を生じてゴム硬度の指示を行うためのダイアルゲージ機構15が装備されている。ダイアルゲージ機構15の入力端は、指針軸14に平行した角度でケーシング内空間に位置する軸長型ピニオン16である。
【0009】
ピニオン16は、ケーシング10の中間部以下に装備された押針保持構造の上端に固定され、目盛板11と平行に傾斜配置されたラック17と噛み合っている。この場合、ピニオン軸は水平に対して30°傾斜し、ラック17の歯面は垂直面内に位置するが、各歯条の方向も同様に30°傾斜しているため、ピニオンとの噛合が可能となる。押針18は使用時に水平となるケーシング10下端面の遊合孔19を貫通して下向きに突出し、この押針18の上端は垂直スピンドル20により支持される。スピンドル20は、ケーシング10下部に嵌め込んだ下部軸受け21と、棚部30に圧入された上部軸受22によって保持され、上端の支持ブロック23を介してラック17の下端を固定支持したものである。
【0010】
スピンドル20と下部軸受21及び上部軸受22を主体とする押針18の保持構造は、その押針18を下向きに付勢するためのスプリング24を含んでいる。棚部30における上部軸受22の上端にネジ係合した上部フランジ22aは、支持ブロック23の下面を制止する突出制止部として、押針18の先端を無負荷時において前記遊合孔19から調整された寸法だけ突出させる。同じく上部軸受22の下端にネジ係合した下部フランジ22bは、スピンドル20に形成された鍔部25との間で前記スプリング24を挟持するバネ座となる。図3からも明らかなとおり、棚部30の先端には上部フランジ22a及び下部フランジ22bを固定するためのクランプ板26が取り付けられ、そのクランプネジ27a、27bによりこれらのフランジ22a、22bを締めつけることができる。同じく図3において、支持ブロック23から突出したガイド棒28は、棚部30に固定されたガイド溝ブロック29の溝内に位置し、スピンドル20の軸旋回を拘束する。それにより、押針18がゴム試料面を加圧して押し上げられたとき、これに伴って上昇するスピンドル20、従ってラック17は、ピニオン16と常時噛み合う角度に維持される。
【0011】
上記実施例の構造においては、ケーシング下端から突出した押針18がゴム面に押されてその硬度に応じて後退(上昇)するとき、傾斜配置されたラック17も上昇して順次下側の歯がピニオン16と噛合することになるが、その噛合位置はラック傾斜角度(この場合30°)の正弦をその上昇距離に掛けた分だけピニオン軸方向に移動し、逆にピニオン16はこの噛合位置の横移動を許容するだけの軸方向長さを有するが故に、指針12は傾斜した目盛板11(図4)上を、目盛り“0”から“100”までの全範囲において回動できることになる。従って測定者は作業机上のゴム硬度計を操作しつつ腰掛けた自然の姿勢において、斜め下方に顔を向けることにより手元のゴム硬度計目盛板を見ることができる。
【0012】
【発明の効果】
以上述べた通り、本発明によれば簡単ではあるが独自の(ピニオン軸方向に相互に摺動しつつ噛み合う)ラック─ピニオン係合構造により、垂直押針に対して後方に傾斜した目盛板を設け、操作及び観察作業を容易にしたゴム硬度計を提供するものである。
【図面の簡単な説明】
【図1】従来の典型的な携帯用ゴム硬度計本体の実施例を示す正面図(A)、及び一部破断側面図(B)である。
【図2】本発明の実施例におけるゴム硬度計の側断面である。
【図3】図2に示したゴム硬度計の背面図である。
【図4】図2に示したゴム硬度計の傾斜した目盛板部の正面を示す図である。
【符号の説明】
10 ケーシング
11 目盛板
14 指針軸
15 ダイアルゲージ機構
16 ピニオン
17 ラック
18 押針
19 遊合孔
20 スピンドル
22a 上部フランジ(突出制止部)
24 スプリング
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a portable rubber hardness meter.
[0002]
[Prior art]
The main body of a rubber hardness tester, particularly a portable rubber hardness tester specified as “durometer” in the standard of JISK6253, etc. is a rubber sample in which a push needle 1 protruding from the lower end surface of a casing is placed on a horizontal plane as shown in FIG. It is pressed perpendicularly to the surface, and the retracted dimension corresponding to the rubber hardness is converted into the rotation angle of the pointer 3 mounted on the dial 2 on the front of the casing. As shown in FIG. 1B, the push needle holding and displacement transmission mechanism has a rack 5 installed or formed on the side surface of the central portion of the spindle 4 holding the push needle 1, and an input pinion 6 of a pointer driving mechanism (dial gauge mechanism). Are intertwined. A spring 7 is disposed above the spindle 4, and this urges the attachment 8 at the upper end of the spindle 4 to determine the retraction amount of the push needle 1 according to the rubber hardness.
[0003]
In the above structure, in order for the pinion 6 to mesh with the rack 5 that is vertically arranged on the extension line of the push needle 1, its axis must be horizontally arranged, and the pointer 3 that interlocks with the pinion 6 by a simple transmission mechanism. The axis must also be placed horizontally. In this relationship, the pointer 3 operates on the dial plate of the dial 2 located in the vertical plane, like the rack 5. The term “vertical” used here is not vertical in relative meaning, but “vertical” with respect to “horizontal” in the use of the rubber hardness tester, and is therefore used in an azimuth sense.
[0004]
In order for the measurer to see the scale plate in the vertical plane from the front, the operator can hold the rubber hardness tester on the work desk and lift his / her waist from the chair to put his / her hips and knees in place. You must take a look into the front of the rubber hardness tester.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a rubber hardness tester in which a scale plate can be seen from the front even when a measurer is sitting on a chair.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the rubber hardness tester according to the present invention includes: a) a scale plate that is inclined rearward in the front of the casing;
b) A dial gauge mechanism for instructing rubber hardness by generating rotational displacement on a pointer shaft perpendicular to the scale plate, and equipped with an input pinion that protrudes into the casing space parallel to the pointer shaft And what
c) A downward push needle penetrating the loose hole at the lower end of the casing is supported by a vertical spindle, and the vertical end of the push needle is pressed so as to protrude by a certain dimension from the loose hole when no load is applied. A push needle holding structure having a spring and a protrusion restraining portion that constantly urges the spindle downward;
d) a rack provided at an upper portion of the vertical spindle at an inclination angle parallel to the scale plate and directly meshing with the input pinion ,
e) The input pinion is rotated by the rack being moved up and down following the retracting operation from the lower end of the casing of the push needle while maintaining the meshed state with the input pinion. is there.
[0007]
In the above structure, it is desirable that the rearward inclination angle of the scale plate is 25 ° to 35 °, preferably about 30 °. The pinion of the dial gauge mechanism has a margin dimension corresponding to the sine of the inclination angle, and accurately transmits the retraction of the push needle corresponding to the rubber hardness as the pointer rotational displacement on the inclined scale plate. Thereby, the measurer can see the rubber hardness meter scale plate at hand in a natural posture while operating the rubber hardness meter on the work desk.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 shows a side cross section of a rubber hardness tester according to an embodiment of the present invention. The front upper portion of the casing 10 is inclined, for example, 30 ° rearward, and has a scale plate 11 and a pointer 12 in the inclined surface. A dial structure 13 is provided. In the casing 10, a pointer shaft 14 perpendicular to the surface of the scale plate 11 enters the back side of the scale plate 11, and a dial gauge mechanism 15 for instructing rubber hardness by generating rotational displacement on the shaft 14 is provided. ing. The input end of the dial gauge mechanism 15 is a shaft length type pinion 16 positioned in the space in the casing at an angle parallel to the pointer shaft 14.
[0009]
The pinion 16 is fixed to the upper end of the push needle holding structure provided below the middle part of the casing 10 and meshes with a rack 17 that is inclined and parallel to the scale plate 11. In this case, the pinion shaft is inclined by 30 ° with respect to the horizontal, and the tooth surface of the rack 17 is located in the vertical surface, but the direction of each tooth is similarly inclined by 30 °, so that the engagement with the pinion is It becomes possible. The push needle 18 protrudes downward through a loose hole 19 in the lower end surface of the casing 10 that is horizontal during use, and the upper end of the push needle 18 is supported by a vertical spindle 20. The spindle 20 is held by a lower bearing 21 fitted in the lower portion of the casing 10 and an upper bearing 22 press-fitted into the shelf portion 30, and the lower end of the rack 17 is fixedly supported via a support block 23 at the upper end.
[0010]
The holding structure of the push needle 18 mainly composed of the spindle 20, the lower bearing 21 and the upper bearing 22 includes a spring 24 for urging the push needle 18 downward. The upper flange 22a screw-engaged with the upper end of the upper bearing 22 in the shelf 30 is adjusted from the loose hole 19 when the tip of the push needle 18 is unloaded as a protrusion restraining portion that restrains the lower surface of the support block 23. Project only the dimension. Similarly, the lower flange 22 b screw-engaged with the lower end of the upper bearing 22 serves as a spring seat that holds the spring 24 between the lower flange 22 b formed on the spindle 20. As is apparent from FIG. 3, a clamp plate 26 for fixing the upper flange 22a and the lower flange 22b is attached to the front end of the shelf 30, and these flanges 22a and 22b are tightened by the clamp screws 27a and 27b. Can do. Similarly, in FIG. 3, the guide bar 28 protruding from the support block 23 is positioned in the groove of the guide groove block 29 fixed to the shelf portion 30 and restrains the spindle 20 from turning. As a result, when the push needle 18 is pushed up by pressing the rubber sample surface, the spindle 20 that rises accordingly, and thus the rack 17 is maintained at an angle that always meshes with the pinion 16.
[0011]
In the structure of the above embodiment, when the push needle 18 protruding from the lower end of the casing is pushed by the rubber surface and retracts (rises) according to its hardness, the inclined rack 17 also rises and sequentially lowers the lower teeth. Meshes with the pinion 16, but the meshing position moves in the pinion axial direction by the sine of the rack inclination angle (30 ° in this case) multiplied by the ascent distance, and conversely, the pinion 16 is in this meshing position. Therefore, the pointer 12 can rotate on the inclined scale plate 11 (FIG. 4) in the entire range from the scale “0” to “100”. . Therefore, the measurer can see the rubber hardness meter scale plate at hand by turning his / her face obliquely downward in a natural posture while operating the rubber hardness meter on the work desk.
[0012]
【The invention's effect】
As described above, according to the present invention, a scale plate tilted backward with respect to the vertical push needle can be obtained by a unique rack-pinion engagement structure (meshing while sliding relative to each other in the pinion axis direction). Provided is a rubber hardness meter that is easy to install, operate and observe.
[Brief description of the drawings]
FIG. 1A is a front view showing an example of a conventional typical portable rubber hardness tester body, and FIG.
FIG. 2 is a side cross-sectional view of a rubber hardness tester in an example of the present invention.
FIG. 3 is a rear view of the rubber hardness meter shown in FIG. 2;
4 is a view showing the front of the inclined scale plate portion of the rubber hardness tester shown in FIG. 2;
[Explanation of symbols]
10 Casing 11 Scale plate 14 Pointer shaft 15 Dial gauge mechanism 16 Pinion 17 Rack 18 Push needle 19 Floating hole 20 Spindle 22a Upper flange (projection restraining part)
24 Spring

Claims (1)

a)ケーシング正面において後方に傾斜させた目盛板と、
b)前記目盛板に対して直角な指針軸に回転変位を生じてゴム硬度の指示を行うためのダイアルゲージ機構であって、前記指針軸に平行してケーシング内空間に突出した入力ピニオンを装備したものと、
c)ケーシング下端部の遊合孔を貫通した下向き押針を垂直スピンドルにより支持し、前記押針のゴム加圧用の先端が無負荷時において前記遊合孔から一定寸法だけ突出するように前記垂直スピンドルを常時下向きに付勢するスプリング及び突出制止部を備えた押針保持構造と、
d)前記垂直スピンドルの上部に前記目盛板と平行した傾斜角度で設けられ、かつ、前記入力ピニオンと直接噛合するラックと、を備え、
e)前記ラックが、前記入力ピニオンとの噛合状態を維持しつつ、前記押針先端のケーシング下端からの出没動作に従動して上下動することにより、前記入力ピニオンを回転させるようになっていることを特徴とする傾斜ダイアル型ゴム硬度計。
a) A scale plate inclined rearward in the front of the casing;
b) A dial gauge mechanism for instructing rubber hardness by generating rotational displacement on a pointer shaft perpendicular to the scale plate, and equipped with an input pinion that protrudes into the casing space parallel to the pointer shaft And what
c) A downward push needle penetrating the loose hole at the lower end of the casing is supported by a vertical spindle, and the vertical end of the push needle is pressed so as to protrude by a certain dimension from the loose hole when no load is applied. A push needle holding structure having a spring and a protrusion restraining portion that constantly urges the spindle downward;
d) a rack provided at an upper portion of the vertical spindle at an inclination angle parallel to the scale plate and directly meshing with the input pinion ,
e) While the rack is engaged with the input pinion, the input pinion is rotated by moving up and down following the retracting operation of the tip of the push needle from the lower end of the casing. Inclined dial type rubber hardness tester.
JP03372598A 1998-01-30 1998-01-30 Inclined dial type rubber hardness tester Expired - Fee Related JP3936791B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03372598A JP3936791B2 (en) 1998-01-30 1998-01-30 Inclined dial type rubber hardness tester

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Application Number Priority Date Filing Date Title
JP03372598A JP3936791B2 (en) 1998-01-30 1998-01-30 Inclined dial type rubber hardness tester

Publications (2)

Publication Number Publication Date
JPH11218479A JPH11218479A (en) 1999-08-10
JP3936791B2 true JP3936791B2 (en) 2007-06-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101839830A (en) * 2010-04-30 2010-09-22 安徽省(水利部淮河水利委员会)水利科学研究院 Mortar strength digital display testing instrument

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006098182A (en) * 2004-09-29 2006-04-13 Dow Corning Toray Co Ltd Inspection method and inspection tool of execution sealant
JP6829065B2 (en) * 2016-12-19 2021-02-10 マクセル株式会社 Hardness meter and hardness measurement method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0171602U (en) * 1987-11-02 1989-05-12
JP2561468Y2 (en) * 1991-10-30 1998-01-28 生物系特定産業技術研究推進機構 Softness measuring instrument for fruits and vegetables
JPH08201259A (en) * 1995-01-27 1996-08-09 Akashi:Kk Hardness meter for elastic body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101839830A (en) * 2010-04-30 2010-09-22 安徽省(水利部淮河水利委员会)水利科学研究院 Mortar strength digital display testing instrument

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