JPWO2017221345A1 - Water content dependent friction force measuring device and water content dependent friction force measuring method - Google Patents

Water content dependent friction force measuring device and water content dependent friction force measuring method Download PDF

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JPWO2017221345A1
JPWO2017221345A1 JP2017527671A JP2017527671A JPWO2017221345A1 JP WO2017221345 A1 JPWO2017221345 A1 JP WO2017221345A1 JP 2017527671 A JP2017527671 A JP 2017527671A JP 2017527671 A JP2017527671 A JP 2017527671A JP WO2017221345 A1 JPWO2017221345 A1 JP WO2017221345A1
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幹也 倉本
幹也 倉本
友香理 井土
友香理 井土
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Abstract

抱水量依存摩擦力測定装置（１）は、天秤支持部（２）と、天秤支持部（２）の上に支持される天秤（３）と、天秤（３）の計量皿支持部から吊り下げられ、天秤支持部（２）が形成する空間内に、可撓性および抱水性を有するシート状の試料（９）を広げて吊り下げた状態で保持する計測治具（４）と、中心軸の周りの回転面である回転楕円面の一部を有し、中心軸が計測治具（４）に保持された試料（９）のシート面に平行でかつ水平に支持され、試料（９）に接触しない第１位置と、試料（９）のシート面に回転楕円面が接触する第２位置との間を、中心軸に直交する面の中でシート面に交わる方向に平行移動可能であり、第２位置で、回転楕円面の試料（９）に接触した部分が重力方向に中心軸を回転軸として回転可能である摩擦子（５）と、を備え、天秤（３）は、摩擦子（５）が第１位置にあるときの指示値と、摩擦子（５）が第２位置で回転するときの指示値とを出力する。The water-holding-dependent frictional force measuring device (1) is suspended from the balance support (2), the balance (3) supported on the balance support (2), and the weighing pan support of the balance (3). And a measuring jig (4) for holding a sheet-like sample (9) having flexibility and water repellency in a space formed by the balance support part (2) and being suspended, and a central axis A part of a spheroid that is a rotation surface around the center of which the center axis is parallel to and horizontally supported by the sheet surface of the sample (9) held by the measuring jig (4), and the sample (9) Can be translated in a direction intersecting the sheet surface in a plane orthogonal to the central axis between the first position that does not contact the surface and the second position where the spheroidal surface contacts the sheet surface of the sample (9). In the second position, the part of the ellipsoidal surface in contact with the sample (9) is rotatable in the direction of gravity with the central axis as the rotation axis. The balance (3) outputs an instruction value when the friction element (5) is in the first position and an instruction value when the friction element (5) rotates at the second position. .

Description

本発明は、抱水量によって摩擦力が異なる生地材料の摩擦力を測定する抱水量依存摩擦力測定装置および抱水量依存摩擦力測定方法に関する。   The present invention relates to a water retention amount-dependent friction force measurement device and a water retention amount-dependent friction force measurement method for measuring the friction force of a fabric material having a friction force that varies depending on the water retention amount.

衣料の着用時において皮膚面の湿度上昇は不快なむれ感を生じるため、特許文献１〜７に記載のような吸湿性や速乾性を高めた衣料が開発されている。衣料の場合、生地材料の水分移動特性のみならず、表面に存在する水と肌との界面状態も快適性を左右する大きな要因である。これに起因する感覚に「べとつき」がある。衣料の「べとつき」は、湿潤状態の生地材料の摩擦力に関係する。   Since an increase in the humidity on the skin surface causes an unpleasant sensation when the garment is worn, garments with improved hygroscopicity and quick drying properties as described in Patent Documents 1 to 7 have been developed. In the case of clothing, not only the moisture transfer characteristics of the fabric material but also the interface state between the water and the skin existing on the surface are major factors that affect the comfort. There is “stickiness” in the sense resulting from this. The “stickiness” of clothing is related to the frictional force of the wet fabric material.

特許文献１には、回転する金属ローラと布帛の間に１ｃｃの水を注入して、布帛にかかる張力を布帛の湿潤摩擦力として測定することが記載されている。   Patent Document 1 describes that 1 cc of water is injected between a rotating metal roller and a fabric, and the tension applied to the fabric is measured as the wet frictional force of the fabric.

特許文献２には、アクリル板に、試料布帛の飽和吸水量以上の水を滴下し、その上に試料布帛を、衣料にする時に肌側となる面が下になるように置いてアクリル板に密着させ、ついで、該試料布帛の外側面中心部に取り付けられた糸を、引張試験機を用いて垂直に引き上げてアクリル板から試料布帛を剥離させ、その時に要した力の最大値を読み取って、はりつき力とすることが記載されている。   In Patent Document 2, water exceeding the saturated water absorption amount of the sample fabric is dropped onto the acrylic plate, and the sample fabric is placed on the acrylic plate so that the surface on the skin side is downward when making it into clothing. Next, the yarn attached to the center of the outer surface of the sample fabric is pulled up vertically using a tensile tester to peel the sample fabric from the acrylic plate, and the maximum value of the force required at that time is read. , It is described as a sticking force.

特許文献７には、試料に一定量の水分を肌面から均一に含ませて、アクリル樹脂製の円筒を垂直に立てたものに、試料の経方向を垂直方向として肌面側を貼り付けようとしたときに、貼り付けることの出来ないぎりぎりの含水量を曲面はりつき指数とすることが記載されている。   In Patent Document 7, let's attach a skin surface side to a sample in which a certain amount of moisture is uniformly contained from the skin surface, and a cylinder made of acrylic resin is set up vertically, with the longitudinal direction of the sample as the vertical direction. It is described that the bare water content that cannot be pasted is used as a curved surface sticking index.

特開平９−１９５１７２号公報JP-A-9-195172 特開２００１−３０３４０８号公報JP 2001-303408 A 特開２０１３−１３３５７２号公報JP 2013-133572 A 特開２０１２−２１２５４号公報JP 2012-21254 A 特開２００４−１１０６９号公報JP 2004-11069 A 特開２００１−２５４２４４号公報JP 2001-254244 A 特開２００４−２７００４７号公報JP 2004-270047 A

湿潤状態の生地材料の摩擦力は、抱水量によって異なる。特許文献１、２および７に記載の生地材料の湿潤摩擦力やはりつき力を評価する方法では、生地材料の抱水量と摩擦力との関係を正確に測定することはできなかった。   The frictional force of the dough material in the wet state varies depending on the amount of water retained. With the methods for evaluating the wet friction force of the dough material described in Patent Documents 1, 2, and 7, the relationship between the water content and the friction force of the dough material could not be accurately measured.

本発明は、上述の事情に鑑みてなされたもので、試料の抱水量と摩擦力との関係を正確に測定することを目的とする。   The present invention has been made in view of the above-described circumstances, and an object thereof is to accurately measure the relationship between the water holding amount of a sample and the frictional force.

上記目的を達成するため、本発明に係る抱水量依存摩擦力測定装置は、
可撓性および抱水性を有するシート状の試料を、広げて吊り下げた状態で収容しうる空間を形成する天秤支持部と、
前記天秤支持部の上に支持される天秤と、
前記天秤の計量皿支持部から吊り下げられ、前記天秤支持部が形成する空間内に前記試料を広げて吊り下げた状態で保持する計測治具と、
中心軸の周りの回転面であって、円柱面である場合を含む回転楕円面の一部を有し、前記回転楕円面が前記計測治具に保持された前記試料のシート面に対向して、前記中心軸が前記計測治具に保持された前記試料のシート面に平行でかつ水平に支持され、前記計測治具に保持された前記試料に接触しない第１位置と、前記計測治具に保持された前記試料のシート面に前記回転楕円面が接触する第２位置との間を、前記中心軸に直交する面の中で前記シート面に交わる方向に平行移動可能であり、前記第２位置で、前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転可能である摩擦子と、
を備え、
前記天秤は、前記摩擦子が前記第１位置にあるときの指示値、および、前記摩擦子が前記第２位置で前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転するときの指示値を出力する。In order to achieve the above object, the water content-dependent frictional force measuring device according to the present invention comprises:
A balance support part that forms a space that can accommodate a sheet-like sample having flexibility and water-holding property in a state where the sample is spread and suspended; and
A scale supported on the scale support;
A measuring jig that is suspended from the weighing pan support portion of the balance and holds the sample in a suspended state in a space formed by the balance support portion, and
A rotating surface around a central axis, having a part of a rotating ellipsoid including a cylindrical surface, the rotating ellipsoid facing the sheet surface of the sample held by the measuring jig A first position where the central axis is parallel to and horizontally supported by a sheet surface of the sample held by the measurement jig and does not contact the sample held by the measurement jig; and It is possible to translate between the second position where the spheroidal surface is in contact with the held sheet surface of the sample in a direction intersecting the sheet surface among the surfaces orthogonal to the central axis, A position where the portion in contact with the sample is rotatable in the direction of gravity with the central axis as a rotation axis;
With
The balance is an indication value when the friction element is at the first position, and a portion where the friction element contacts the sample at the second position rotates in the direction of gravity with the central axis as a rotation axis. The indicated value is output.

本発明に係る抱水量依存摩擦力測定方法は、
可撓性および抱水性を有するシート状の試料を、広げて吊り下げた状態で収容しうる空間を形成する天秤支持部の上に支持される天秤の計量皿支持部から吊り下げられ、前記天秤支持部が形成する空間内に前記試料を広げて吊り下げた状態で保持する計測治具に前記試料に水分を付与して保持させ、
中心軸の周りの回転面であって、円柱面である場合を含む回転楕円面の一部を有し、前記回転楕円面が前記計測治具に保持された前記試料のシート面に対向して、前記中心軸が前記計測治具に保持された前記試料のシート面に平行でかつ水平に支持される摩擦子を前記計測治具に保持された前記試料に接触しない第１位置から、前記計測治具に保持された前記試料のシート面に前記回転楕円面が接触する第２位置に、前記中心軸に直交する面の中で前記シート面に交わる方向に平行移動させ、
前記摩擦子を、前記第２位置で、前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転させ、
前記天秤が出力する、前記摩擦子が前記第１位置にあるときの指示値と、前記摩擦子が前記第２位置で前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転するときの指示値とを記録する。The water content-dependent frictional force measuring method according to the present invention is:
A sheet-like sample having flexibility and water repellency is suspended from a weighing pan support portion of a balance supported on a balance support portion that forms a space that can be accommodated in an unfolded and suspended state. Moisture is applied to the sample and held in a measurement jig that holds the sample in a state where the sample is spread and suspended in the space formed by the support part,
A rotating surface around a central axis, having a part of a rotating ellipsoid including a cylindrical surface, the rotating ellipsoid facing the sheet surface of the sample held by the measuring jig From the first position where the center axis is parallel to the sheet surface of the sample held by the measurement jig and supported horizontally, the friction element is not in contact with the sample held by the measurement jig. To the second position where the spheroidal surface comes into contact with the sheet surface of the sample held by the jig, in the plane orthogonal to the central axis, in a direction intersecting the sheet surface,
The friction element is rotated at the second position where the portion in contact with the sample is in the direction of gravity with the central axis as a rotation axis.
The indication value when the friction element is in the first position, which is output from the balance, and the portion where the friction element contacts the sample at the second position rotate in the direction of gravity with the central axis as the rotation axis. Record the indicated value.

本発明によれば、試料の抱水量と摩擦力との関係を正確に測定することが可能になる。   According to the present invention, it is possible to accurately measure the relationship between the water holding amount of a sample and the frictional force.

本発明の実施の形態に係る抱水量依存摩擦力測定装置の構成例を示す図である。It is a figure which shows the structural example of the water retention amount dependent frictional force measuring apparatus which concerns on embodiment of this invention. 実施の形態に係る抱水量依存摩擦力測定装置の摩擦子の第１位置の一例を示す図である。It is a figure which shows an example of the 1st position of the friction element of the water holding | maintenance amount dependence frictional force measuring apparatus which concerns on embodiment. 実施の形態に係る抱水量依存摩擦力測定装置の摩擦子の第２位置の一例を示す図である。It is a figure which shows an example of the 2nd position of the friction element of the water holding | maintenance amount dependence frictional force measuring apparatus which concerns on embodiment. 実施の形態に係る試料Ａおよび試料Ｂの拡散性残留水分率性能を示す図である。It is a figure which shows the diffusive residual moisture content performance of the sample A and sample B which concern on embodiment. 実施の形態に係る試料Ａの摩擦力の測定結果を示す図である。It is a figure which shows the measurement result of the frictional force of the sample A which concerns on embodiment. 実施の形態に係る試料Ａの乾燥過程における残留水分率と摩擦力との関係を示すグラフである。It is a graph which shows the relationship between the residual moisture content and the frictional force in the drying process of the sample A which concerns on embodiment. 実施の形態に係る試料Ｂの乾燥過程における残留水分率と摩擦力との関係を示すグラフである。It is a graph which shows the relationship between the residual moisture content and the frictional force in the drying process of the sample B which concerns on embodiment.

以下、図面を参照して、本発明の実施の形態について詳細に説明する。なお、図中、同一または相当する部分には、同じ符号を付す。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

図１は、本発明の実施の形態に係る抱水量依存摩擦力測定装置の構成例を示す図である。抱水量依存摩擦力測定装置１は、天秤支持部２と、天秤３と、計測治具４と、摩擦子５と、駆動部６ａおよび駆動部６ｂ（以下、総称する場合には駆動部６という）と、上部柱状部材７ａおよび下部柱状部材７ｂ（以下、総称する場合には柱状部材７という）と、記憶装置８とを備える。天秤支持部２は、可撓性および抱水性を有するシート状の試料９を、広げて吊り下げた状態で収容しうる空間を形成する。天秤３は、天秤支持部２の上に支持される。計測治具４は、天秤３の計量皿支持部から吊り下げられ、天秤支持部２が形成する空間内に試料９を広げて吊り下げた状態で保持する。このとき、計測治具４に保持された試料９の下に荷重を付けて一定の張力をかけてもよい。   FIG. 1 is a diagram illustrating a configuration example of a water retention amount-dependent frictional force measuring apparatus according to an embodiment of the present invention. The water holding amount-dependent frictional force measuring device 1 includes a balance support unit 2, a balance 3, a measurement jig 4, a friction element 5, a drive unit 6a, and a drive unit 6b (hereinafter, collectively referred to as a drive unit 6). ), An upper columnar member 7 a and a lower columnar member 7 b (hereinafter, collectively referred to as a columnar member 7), and a storage device 8. The balance support part 2 forms a space in which a sheet-like sample 9 having flexibility and water repellency can be accommodated in a state where it is spread and suspended. The balance 3 is supported on the balance support part 2. The measuring jig 4 is suspended from the weighing pan support part of the balance 3, and holds the sample 9 in a state where the sample 9 is spread and suspended in the space formed by the balance support part 2. At this time, a constant tension may be applied by applying a load under the sample 9 held by the measuring jig 4.

円柱形の摩擦子５は、中心軸の周りの回転面である円柱面が計測治具４に保持された試料９のシート面に対向し、中心軸が計測治具４に保持された試料９のシート面に平行でかつ水平に支持される。シート面とは、計測治具４に広げて吊り下げられた状態の試料９の最も広い２面のうち、摩擦子５に対向する面をいう。摩擦子５は、計測治具４に保持された試料９に接触しない第１位置と、計測治具４に保持された試料９のシート面に円柱面が接触する第２位置との間を、シート面に対して垂直方向に平行移動可能である。摩擦子５は第２位置で、試料９に接触した部分が重力方向に中心軸を回転軸として回転可能である。   In the cylindrical friction element 5, the cylindrical surface which is a rotating surface around the central axis faces the sheet surface of the sample 9 held by the measuring jig 4, and the sample 9 has the central axis held by the measuring jig 4. Is supported in parallel and horizontally to the sheet surface. The sheet surface refers to a surface facing the friction element 5 among the two widest surfaces of the sample 9 that is spread and suspended on the measuring jig 4. The friction element 5 is between the first position where the sample 9 held by the measurement jig 4 does not contact the second position where the cylindrical surface contacts the sheet surface of the sample 9 held by the measurement jig 4. It can be translated in a direction perpendicular to the sheet surface. The friction element 5 is in the second position, and the portion in contact with the sample 9 can rotate in the direction of gravity with the central axis as the rotation axis.

駆動部６ａは、例えばアクチュエータで構成され、摩擦子５を第１位置から第２位置に、第２位置から第１位置に移動させる。駆動部６ｂは、例えばモータで構成され、摩擦子５を第２位置で回転させる。駆動部６は、摩擦子５を第１位置から第２位置に移動させ、摩擦子５を第２位置で回転させた後、第１位置に移動させる動作を１回以上繰り返す。   The driving unit 6a is configured by an actuator, for example, and moves the friction element 5 from the first position to the second position and from the second position to the first position. The drive part 6b is comprised, for example with a motor, and rotates the friction element 5 in a 2nd position. The driving unit 6 moves the friction element 5 from the first position to the second position, rotates the friction element 5 at the second position, and then moves the friction element 5 to the first position one or more times.

円柱形の柱状部材７は、計測治具４に保持された試料９のシート面に対して摩擦子５の反対側に中心軸が水平に支持される。柱状部材７は、摩擦子５が第１位置にある時は試料９に接触せず、摩擦子５が第２位置にある時は試料９に接触する。上部柱状部材７ａは、第２位置にあるときの摩擦子５の中心軸よりも上に配置されている。下部柱状部材７ｂは、第２位置にあるときの摩擦子５の中心軸よりも下に配置されている。ここで、摩擦子５が第１位置および第２位置にある状態について説明する。   The cylindrical columnar member 7 has a central axis that is horizontally supported on the opposite side of the friction element 5 with respect to the sheet surface of the sample 9 held by the measuring jig 4. The columnar member 7 does not contact the sample 9 when the friction element 5 is in the first position, and contacts the sample 9 when the friction element 5 is in the second position. The upper columnar member 7a is disposed above the central axis of the friction element 5 when in the second position. The lower columnar member 7b is disposed below the central axis of the friction element 5 when in the second position. Here, a state where the friction element 5 is in the first position and the second position will be described.

図２Ａは、実施の形態に係る抱水量依存摩擦力測定装置の摩擦子の第１位置の一例を示す図である。図２Ａは、第１位置にある摩擦子５、計測治具４、駆動部６および柱状部材７を摩擦子５の中心軸の方向に見た断面を示している。摩擦子５が第１位置にあるとき、計測治具４に広げて吊り下げた状態で保持された試料９のシート面は鉛直方向に延びている。このとき、摩擦子５および柱状部材７は試料９に接触しない。摩擦子５は、駆動部６ａによって第１位置から矢印Ｔの方向に移動する。   FIG. 2A is a diagram illustrating an example of a first position of the friction element of the water retention amount-dependent friction force measuring device according to the embodiment. FIG. 2A shows a cross section of the friction element 5, the measuring jig 4, the driving unit 6, and the columnar member 7 in the first position when viewed in the direction of the central axis of the friction element 5. When the friction element 5 is in the first position, the sheet surface of the sample 9 held in a state of being spread and suspended on the measuring jig 4 extends in the vertical direction. At this time, the friction element 5 and the columnar member 7 do not contact the sample 9. The friction element 5 is moved in the direction of the arrow T from the first position by the drive unit 6a.

図２Ｂは、実施の形態に係る抱水量依存摩擦力測定装置の摩擦子の第２位置の一例を示す図である。図２Ｂは、第２位置にある摩擦子５、計測治具４、駆動部６および柱状部材７を摩擦子５の中心軸の方向に見た断面を示している。摩擦子５が、駆動部６ａによって第２位置まで移動すると、試料９は、柱状部材７に接触し、摩擦子５および柱状部材７の位置で規定される面積で摩擦子５に接触する。試料９の下に荷重が付いている場合には、試料９はより安定して摩擦子５に接触する。摩擦子５は第２位置で、駆動部６ｂによって矢印Ｒの方向に回転する。矢印Ｒの方向は、摩擦子５の試料９に接触した部分が重力方向に中心軸を回転軸として回転する方向である。   FIG. 2B is a diagram illustrating an example of a second position of the friction element of the water retention amount-dependent friction force measuring device according to the embodiment. FIG. 2B shows a cross section of the friction element 5, the measuring jig 4, the drive unit 6, and the columnar member 7 in the second position when viewed in the direction of the central axis of the friction element 5. When the friction element 5 is moved to the second position by the drive unit 6a, the sample 9 contacts the columnar member 7, and contacts the friction element 5 with an area defined by the position of the friction element 5 and the columnar member 7. When a load is applied under the sample 9, the sample 9 comes into contact with the friction element 5 more stably. The friction element 5 is rotated in the direction of arrow R by the drive unit 6b at the second position. The direction of arrow R is the direction in which the portion of the friction element 5 that contacts the sample 9 rotates in the direction of gravity with the central axis as the rotation axis.

摩擦子５は、第１位置から第２位置に移動するまでの間は中心軸の周りに自由回転可能に支持される。これにより、摩擦子５が第２位置に移動したときに、試料９が摩擦子５に接触することによって引っ張られることを抑制できる。柱状部材７は、中心軸の周りに自由回転可能に支持される。これにより、摩擦子５が第２位置に移動したときに、試料９が柱状部材７に接触することによって引っ張られることを抑制できる。   The friction element 5 is supported so as to be freely rotatable around the central axis until it moves from the first position to the second position. Thereby, when the friction element 5 moves to the second position, it can be suppressed that the sample 9 is pulled by contacting the friction element 5. The columnar member 7 is supported so as to be freely rotatable around the central axis. Thereby, when the friction element 5 moves to the 2nd position, it can suppress that the sample 9 is pulled by contacting the columnar member 7. FIG.

摩擦子５は、一般的には、中心軸の周りの回転面である回転楕円面の一部を有する形状である。円柱面は、回転楕円面を形成する楕円の長軸が無限大である場合と見なすことができる。また、回転楕円面を形成する楕円の長軸と短軸が互いに相等しい場合は、球面である。本願では、回転楕円面は円柱面および球面を含むものとする。円柱形の摩擦子５を用いた場合、人体の円柱面に近い表面を有する部位を摸擬することができ、摩擦子５が第２位置にあるとき、試料９を一定の面積で摩擦子５の円柱面に接触させることができる。球形の摩擦子５を用いた場合、人体の球面に近い表面を有する部位を摸擬することができ、摩擦子５が第２位置にあるとき、試料９を摩擦子５の球面のカーブに沿って接触させることができる。このように、試料９を生地材料とする衣料を着用したときに接触することを想定する人体の部位のカーブに合わせて摩擦子５の形状を選択するとよい。   The friction element 5 generally has a shape having a part of a spheroid that is a rotation surface around the central axis. The cylindrical surface can be regarded as a case where the major axis of the ellipse forming the spheroid is infinite. Further, when the major axis and the minor axis of the ellipse forming the spheroid are equal to each other, it is a spherical surface. In the present application, the spheroidal surface includes a cylindrical surface and a spherical surface. When the cylindrical frictional element 5 is used, a part having a surface close to the cylindrical surface of the human body can be simulated, and when the frictional element 5 is in the second position, the sample 9 has a certain area and the frictional element 5 has a constant area. Can be brought into contact with the cylindrical surface. When the spherical friction element 5 is used, a part having a surface close to the spherical surface of the human body can be simulated, and when the friction element 5 is in the second position, the sample 9 is moved along the curve of the spherical surface of the friction element 5. Can be contacted. In this way, the shape of the friction element 5 may be selected in accordance with the curve of the part of the human body that is supposed to come into contact with the clothing using the sample 9 as a fabric material.

なお、抱水量依存摩擦力測定装置１は、駆動部６を備えなくてもよい。この場合、ユーザが手動で摩擦子５を第１位置から第２位置に移動させ、摩擦子５を第２位置で回転させた後、第１位置に移動させる。ユーザが手動で摩擦子５を回転させる場合には、抱水量依存摩擦力測定装置１は、摩擦子５の回転速度を検出する回転速度検出部を備えるとよい。   The water retention amount-dependent frictional force measuring device 1 may not include the drive unit 6. In this case, the user manually moves the friction element 5 from the first position to the second position, rotates the friction element 5 at the second position, and then moves the friction element 5 to the first position. When the user manually rotates the friction piece 5, the water retention amount-dependent friction force measuring device 1 may include a rotation speed detection unit that detects the rotation speed of the friction piece 5.

図１の天秤３は、摩擦子５が第１位置にあるとき（図２Ａの状態）の指示値と、摩擦子５が第２位置で回転するとき（図２Ｂの状態）の指示値とを記憶装置８に出力する。記憶装置８は、天秤３が出力する、摩擦子５が第１位置にあるときの指示値と、摩擦子５が第２位置で回転するときの指示値とを記録する。天秤３および記憶装置８は、摩擦子５の動作に合わせて、これらの動作を繰り返す。摩擦子５が第１位置にあるときの天秤３の指示値は、試料９自体の質量＋抱水量を示しており、摩擦子５が第２位置で回転するときの天秤３の指示値は、試料９自体の質量＋抱水量＋試料９の摩擦力を示している。これにより、摩擦子５が第２位置で回転する直前および直後の摩擦子５が第１位置にあるときの試料９の抱水量を測定することが可能であるので、試料９の抱水量と摩擦力との関係を正確に測定することができる。   The balance 3 in FIG. 1 has an instruction value when the friction element 5 is in the first position (state of FIG. 2A) and an instruction value when the friction element 5 rotates at the second position (state of FIG. 2B). The data is output to the storage device 8. The storage device 8 records the instruction value output by the balance 3 when the friction element 5 is at the first position and the instruction value when the friction element 5 rotates at the second position. The balance 3 and the storage device 8 repeat these operations in accordance with the operation of the friction element 5. The indication value of the balance 3 when the friction element 5 is in the first position indicates the mass of the sample 9 itself + the amount of water held. The indication value of the balance 3 when the friction element 5 rotates at the second position is The mass of the sample 9 itself + the amount of water held + the frictional force of the sample 9 is shown. This makes it possible to measure the amount of water retained in the sample 9 when the frictional element 5 immediately before and immediately after the frictional element 5 rotates at the second position is in the first position. The relationship with force can be accurately measured.

抱水量依存摩擦力測定装置１では、摩擦力は天秤３の指示値で表されるので単位をｇ重とするが、これは抱水量依存摩擦力測定装置１の設置場所における単位質量（ｇ）にかかる重力の単位で摩擦力を表している。試料、抱水量および周囲の雰囲気条件が同じ場合に、摩擦係数が同じであると仮定すると、摩擦力は摩擦面に加わる全圧力×摩擦係数であるから、測定場所の重力加速度が異なる場合、摩擦面に加わる全圧力は重力加速度に比例するので、摩擦力も異なる。しかし、摩擦力を質量×測定場所の重力加速度を単位として計れば、摩擦面に加わる全圧力は、試料の質量×測定場所の重力加速度であるから、測定場所が異なっても、質量×測定場所の重力加速度を単位とする摩擦力の指示値は同じ値になる。摩擦係数を算出する場合には、摩擦子５が第２位置で回転するときの摩擦力の値を、摩擦子５が第２位置で回転する直前および直後の摩擦子５が第１位置にあるときの試料９の質量（試料９自体の質量＋抱水量）の平均値で除算する。   In the water retention amount-dependent frictional force measuring device 1, since the friction force is expressed by the indicated value of the balance 3, the unit is g weight, which is the unit mass (g) at the place where the water retention amount-dependent frictional force measurement device 1 is installed. The frictional force is expressed in the unit of gravity applied to. Assuming that the friction coefficient is the same when the sample, the amount of water held, and the ambient atmosphere conditions are the same, the friction force is the total pressure applied to the friction surface x the friction coefficient. Since the total pressure on the surface is proportional to the acceleration of gravity, the frictional force is also different. However, if the friction force is measured in terms of mass x gravitational acceleration at the measurement location, the total pressure applied to the friction surface is the mass of the sample x gravitational acceleration at the measurement location. The indicated value of the frictional force in units of gravitational acceleration is the same value. When calculating the friction coefficient, the value of the friction force when the friction element 5 rotates at the second position is set, and the friction element 5 immediately before and after the rotation of the friction element 5 at the second position is at the first position. Divide by the average value of the mass of the sample 9 (the mass of the sample 9 itself + the amount of water held).

記憶装置８は、摩擦子５の回転速度を記憶してもよい。記憶装置８は図１に示すようなＰＣに限らず、フラッシュメモリやハードディスクなど不揮発性メモリを備える装置であればよい。天秤３は指示値を表示部に表示させ、これをユーザが読みとって記録してもよい。この場合は、抱水量依存摩擦力測定装置１は、記憶装置８を備えなくてもよい。また、天秤３は、摩擦子５が試料９のシート面に接触してから第２位置での回転を開始する前までの指示値と、摩擦子５が第２位置での回転を終了してから試料９のシート面から離れるまでの指示値とをさらに記憶装置８に出力してもよい。これにより、試料９の抱水量と、摩擦子５が試料９に接触したときにかかる力および試料９から離れるときにかかる力との関係を正確に測定することができる。天秤３は、摩擦子５が第２位置への移動を終了してから第２位置での回転を開始する前までの指示値を出力してもよい。これにより、試料９の抱水量と、第２位置に移動後の摩擦子５に接触した状態の試料９が元に戻ろうとする力との関係を正確に測定することができる。また、天秤３は、摩擦子５が第２位置での回転を終了してから第１位置への移動を開始する前までの指示値を出力してもよい。これにより、試料９の抱水量と、第２位置での回転後の摩擦子５に接触した状態の試料９が元に戻ろうとする力との関係を正確に測定することができる。   The storage device 8 may store the rotational speed of the friction element 5. The storage device 8 is not limited to a PC as shown in FIG. 1, and may be any device provided with a non-volatile memory such as a flash memory or a hard disk. The balance 3 may display the indicated value on the display unit, and the user may read and record it. In this case, the water retention amount-dependent frictional force measuring device 1 may not include the storage device 8. Further, the balance 3 has an indication value from when the friction element 5 comes into contact with the sheet surface of the sample 9 and before the rotation at the second position is started, and when the friction element 5 finishes the rotation at the second position. To the storage device 8 may be further output to the storage unit 8. Thereby, the relationship between the amount of water held in the sample 9 and the force applied when the friction element 5 comes into contact with the sample 9 and the force applied when leaving the sample 9 can be accurately measured. The balance 3 may output an instruction value from when the friction element 5 finishes moving to the second position to before starting rotation at the second position. Thereby, it is possible to accurately measure the relationship between the water holding amount of the sample 9 and the force with which the sample 9 in contact with the friction element 5 after moving to the second position tries to return to the original position. Further, the balance 3 may output an instruction value from when the friction element 5 finishes rotating at the second position to before starting to move to the first position. Thereby, it is possible to accurately measure the relationship between the water holding amount of the sample 9 and the force with which the sample 9 in contact with the rotated friction element 5 at the second position returns.

抱水量依存摩擦力測定装置１は、上部柱状部材７ａのみを備えてもよいし、下部柱状部材７ｂのみを備えてもよい。柱状部材７は、柱状であれば円柱形でなくてもよく、回転不能に支持されてもよい。あるいは、抱水量依存摩擦力測定装置１は、柱状部材７を備えなくてもよい。   The water retention amount-dependent frictional force measuring apparatus 1 may include only the upper columnar member 7a or only the lower columnar member 7b. The columnar member 7 may not be cylindrical as long as it is columnar, and may be supported so as not to rotate. Alternatively, the water retention amount-dependent frictional force measuring device 1 may not include the columnar member 7.

摩擦子５は、第１位置から第２位置に移動するまでの間は中心軸の周りに回転不能または回転角度が制限されて支持されてもよい。これにより、人体が試料９を生地材料とする衣料を着用したときの、接触したときにかかる力および離れるときにかかる力を実態に近い形で摸擬することができる。摩擦子５が制限される回転角度は、例えば、人体が衣料に触れて移動した時に皮膚が引っ張られて伸びる量を想定して設定するとよい。摩擦子５に衣料との摩擦によって皮膚が移動する分の遊びを設けることで、人体が試料９を生地材料とする衣料を着用したときの、皮膚が引っ張られて伸びる部位が接触したときにかかる力および離れるときにかかる力を実態に近い形で摸擬することができる。   The friction element 5 may be supported around the central axis so that it cannot rotate or the rotation angle is limited until it moves from the first position to the second position. Thereby, when the human body wears clothing using the sample 9 as a fabric material, the force applied when contacting and the force applied when leaving can be simulated in a form close to the actual situation. The rotation angle at which the friction element 5 is limited may be set assuming, for example, the amount that the skin is stretched and stretched when the human body moves while touching the clothing. By providing the friction element 5 with play that allows the skin to move due to friction with the clothing, when the human body wears clothing made of the sample 9 as a fabric material, it is applied when the skin is pulled and the stretched portion comes into contact. It is possible to mimic the force and the force applied when leaving.

また、摩擦子５は、第１位置と第２位置との間を、シート面に対して垂直方向に平行移動する構成に限らず、第１位置と第２位置との間を、摩擦子５の中心軸に直交する面の中でシート面に交わる方向に平行移動可能であればよい。つまり、摩擦子５は、中心軸に直交する面の中を平行移動し、シート面に対して斜め下や斜め上から接触してもよい。摩擦子５が中心軸に直交する面の中を第２位置へ平行移動し、シート面に対して適正な角度で斜め下から接触すれば、回転不能に支持される摩擦子５や柱状部材７に試料９が接触することによって試料９が引っ張られることを抑制できる。摩擦子５が中心軸に直交する面の中を第２位置へ平行移動し、シート面に対して適正な角度で斜め上から接触すれば、摩擦子５が常に中心軸の周りに回転不能に支持されている構成であっても、試料９のシート面に接触してから第２位置への移動を終了する前までの間に摩擦力を測定することができる。ここで、測定の流れについて説明する。   Further, the friction element 5 is not limited to the configuration in which the friction element 5 is translated in the direction perpendicular to the sheet surface between the first position and the second position, and the friction element 5 is disposed between the first position and the second position. It is only necessary to be able to translate in the direction intersecting the sheet surface among the surfaces orthogonal to the central axis. That is, the friction element 5 may translate in a plane orthogonal to the central axis and contact the sheet surface from diagonally below or diagonally above. If the friction element 5 moves in a plane perpendicular to the central axis to the second position and comes into contact with the sheet surface at an appropriate angle from obliquely below, the friction element 5 and the columnar member 7 that are supported so as not to rotate are supported. It can be suppressed that the sample 9 is pulled by the sample 9 coming into contact with the sample 9. If the friction element 5 translates in a plane perpendicular to the central axis to the second position and makes contact with the seat surface from an oblique angle at an appropriate angle, the friction element 5 cannot always rotate around the central axis. Even in the supported configuration, the frictional force can be measured between the time when the sample 9 is brought into contact with the sheet surface and the time when the movement to the second position is completed. Here, the flow of measurement will be described.

測定を開始するとき、ユーザは試料９を計測治具４に保持させる。計測治具４は、水平方向に延びる針部を備え、ユーザは試料９の上部を針部に貫通させて固定する。計測治具４の試料９を固定する部分は、試料９を貫通させる形状に限らず試料９を挟む形状のものでもよい。ユーザは計測治具４に広げて吊り下げた状態で保持された試料９のシート面に決められた量の水を滴下する。ユーザは、試料９に決められた量の水を滴下した後に、試料９を計測治具４に保持させてもよい。試料９に水分を付与する方法は、決められた量の水を滴下する方法に限らない。例えば、試料９を水に浸し、水を十分吸った試料９を計測治具４に保持させてもよい。なお、抱水量依存摩擦力測定装置１は、計測治具４に広げて吊り下げた状態で保持された試料９のシート面に水分を付与する給水装置を備えてもよい。給水装置は、試料９を計測治具４に吊り下げていない状態で、試料９に水分を付与するものでもよい。   When starting the measurement, the user holds the sample 9 on the measuring jig 4. The measuring jig 4 includes a needle portion extending in the horizontal direction, and the user penetrates and fixes the upper portion of the sample 9 to the needle portion. The portion of the measuring jig 4 that fixes the sample 9 is not limited to the shape that allows the sample 9 to pass therethrough, and may have a shape that sandwiches the sample 9. The user drops a predetermined amount of water on the sheet surface of the sample 9 held in a state of being spread and suspended on the measuring jig 4. The user may hold the sample 9 on the measurement jig 4 after dripping a predetermined amount of water onto the sample 9. The method of applying moisture to the sample 9 is not limited to the method of dripping a predetermined amount of water. For example, the sample 9 may be immersed in water, and the sample 9 that has sufficiently absorbed water may be held by the measurement jig 4. The water retention amount-dependent frictional force measuring device 1 may include a water supply device that applies moisture to the sheet surface of the sample 9 that is held in a state of being spread and suspended on the measurement jig 4. The water supply device may apply moisture to the sample 9 in a state where the sample 9 is not suspended from the measurement jig 4.

ユーザは、試料９のシート面に決められた量の水を滴下した後、駆動部６をオンにする。駆動部６はオンになると、摩擦子５を第１位置から第２位置に移動させ、第２位置で回転させる。駆動部６は、摩擦子５を第２位置で回転させた後、第１位置に移動させる。天秤３は、摩擦子５が第１位置にあるときと、第２位置で回転するときの指示値とを出力し、記憶装置８はその指示値を記録する。抱水量依存摩擦力測定装置１は、これらの動作を１回以上繰り返す。   The user turns on the driving unit 6 after dripping a predetermined amount of water onto the sheet surface of the sample 9. When the drive unit 6 is turned on, the friction element 5 is moved from the first position to the second position and rotated at the second position. The drive unit 6 rotates the friction element 5 at the second position and then moves it to the first position. The balance 3 outputs the instruction value when the friction element 5 is in the first position and the rotation value at the second position, and the storage device 8 records the instruction value. The water retention amount-dependent frictional force measuring apparatus 1 repeats these operations once or more.

抱水量依存摩擦力測定装置１が駆動部６を備えない構成の場合は、ユーザは、試料９のシート面に決められた量の水を滴下した後、手動で、摩擦子５を第１位置から第２位置に移動させ、第２位置で回転させる。ユーザは、手動で、摩擦子５を第２位置で回転させた後、第１位置に移動させる。このとき、回転速度検出部は、摩擦子５の回転速度を検出し、記憶装置８に出力する。記憶装置８は、摩擦子５が第２位置で回転するときの指示値と摩擦子５の回転速度の値とを対応付けて記録する。ここで、２つの異なる試料の測定例について説明する。   In the case where the water retention amount-dependent frictional force measuring device 1 does not include the drive unit 6, the user manually drops the determined amount of water on the sheet surface of the sample 9 and then manually moves the friction element 5 to the first position. To the second position and rotated at the second position. The user manually rotates the friction element 5 at the second position and then moves it to the first position. At this time, the rotation speed detection unit detects the rotation speed of the friction element 5 and outputs it to the storage device 8. The storage device 8 records the instruction value when the friction element 5 rotates at the second position and the value of the rotation speed of the friction element 5 in association with each other. Here, measurement examples of two different samples will be described.

図３は、実施の形態に係る試料Ａおよび試料Ｂの拡散性残留水分率性能を示す図である。図３に示すように、乾燥過程において試料Ａおよび試料Ｂの残留水分率は時間経過とともに低下し、素材や構造によってそれぞれ異なる拡散性残留水分率性能を示す。   FIG. 3 is a diagram showing the diffusive residual moisture content performance of Sample A and Sample B according to the embodiment. As shown in FIG. 3, in the drying process, the residual moisture content of Sample A and Sample B decreases with time, and shows different diffusive residual moisture performance depending on the material and structure.

図４は、実施の形態に係る試料Ａの摩擦力の測定結果を示す図である。試料Ａの摩擦力の測定値は、摩擦子５の第１位置と第２位置との移動間隔によって決まる間隔で繰り返し記録される。以下、試料Ａの摩擦力の測定値が記録されている期間を荷重ＯＮ期間、試料Ａの摩擦力の測定値が記録されていない期間を荷重ＯＦＦ期間という。抱水量依存摩擦力測定装置１は、荷重ＯＦＦ期間は、摩擦子５が第１位置にあるときの天秤３の指示値を記録する。抱水量依存摩擦力測定装置１は、摩擦子５が第１位置にあるときの天秤３の指示値（試料Ａ自体の質量＋抱水量）から、完全に乾燥した状態の試料Ａが計測治具４に保持されたときの天秤３の指示値（試料Ａ自体の質量）を引いた値を、試料Ａの抱水量として測定する。また、抱水量依存摩擦力測定装置１は、試料Ａのシート面に決められた量の水が滴下されたときの抱水量を残留水分率１００％として、試料Ａの抱水量から残留水分率を計算する。   FIG. 4 is a diagram illustrating a measurement result of the frictional force of the sample A according to the embodiment. The measured value of the friction force of the sample A is repeatedly recorded at an interval determined by the movement interval between the first position and the second position of the friction element 5. Hereinafter, the period in which the measured value of the friction force of the sample A is recorded is referred to as a load ON period, and the period in which the measured value of the friction force of the sample A is not recorded is referred to as a load OFF period. The water retention amount-dependent frictional force measuring device 1 records the indicated value of the balance 3 when the friction element 5 is in the first position during the load OFF period. The water retention amount-dependent frictional force measuring apparatus 1 is configured so that the sample A in a completely dried state is measured from the indication value of the balance 3 when the friction element 5 is in the first position (mass of the sample A itself + water retention amount). A value obtained by subtracting the indicated value of the balance 3 (the mass of the sample A itself) when held at 4 is measured as the water holding amount of the sample A. In addition, the moisture content-dependent frictional force measuring apparatus 1 uses the water content when a predetermined amount of water is dropped on the sheet surface of the sample A as a residual water content of 100%, and calculates the residual water content from the water content of the sample A. calculate.

抱水量依存摩擦力測定装置１は、荷重ＯＮ期間は、摩擦子５が第２位置で回転するときの天秤３の指示値を記録する。抱水量依存摩擦力測定装置１は、摩擦子５が第２位置で回転するときの天秤３の指示値（試料Ａ自体の質量＋抱水量＋試料Ａの摩擦力）から、直前および直後の摩擦子５が第１位置にあるときの天秤３の指示値の平均値（試料Ａ自体の質量＋抱水量）を引いた値を試料Ａの摩擦力として測定する。ここでは、摩擦子５が第１位置にあるときの天秤３の指示値は、該荷重ＯＦＦ期間の平均値、摩擦子５が第２位置で回転するときの天秤３の指示値は、該荷重ＯＮ期間の平均値とする。図４のグラフには、荷重ＯＮ期間の平均値がプロットされている。抱水量依存摩擦力測定装置１によって試料Ｂの摩擦力を測定する場合も、同様に測定する。   The water retention amount-dependent frictional force measuring device 1 records the indicated value of the balance 3 when the friction element 5 rotates at the second position during the load ON period. The water retention amount-dependent friction force measuring apparatus 1 determines the friction immediately before and after the indication value of the balance 3 (the mass of the sample A itself + the amount of water retained + the friction force of the sample A) when the friction element 5 rotates at the second position. A value obtained by subtracting the average value of the indicated values of the balance 3 when the child 5 is in the first position (the mass of the sample A itself + the water holding amount) is measured as the frictional force of the sample A. Here, the indication value of the balance 3 when the friction element 5 is in the first position is the average value of the load OFF period, and the indication value of the balance 3 when the friction element 5 rotates in the second position is the load value. The average value during the ON period. In the graph of FIG. 4, the average value of the load ON period is plotted. The same measurement is performed when the friction force of the sample B is measured by the water retention amount-dependent friction force measuring apparatus 1.

このように、抱水量依存摩擦力測定装置１は、摩擦子５を第１位置から第２位置に移動させ、第２位置で回転させた後、第１位置に移動させ、摩擦子５が第１位置にあるときと、第２位置で回転するときの指示値とを出力し、その指示値を記録する動作を２回以上繰り返すことで、乾燥過程における試料Ａおよび試料Ｂの抱水量および摩擦力の変化を測定することができる。   As described above, the water retention amount-dependent friction force measuring apparatus 1 moves the friction element 5 from the first position to the second position, rotates the friction element 5 at the second position, and then moves the friction element 5 to the first position. By outputting the instruction value when rotating at the first position and when rotating at the second position and recording the instruction value twice or more, the water holding amount and friction of the sample A and the sample B in the drying process are repeated. The change in force can be measured.

図５Ａは、実施の形態に係る試料Ａの乾燥過程における残留水分率と摩擦力との関係を示すグラフである。試料Ａは、残留水分率が８５％のときに摩擦力がピークの値を示す。図５Ｂは、実施の形態に係る試料Ｂの乾燥過程における残留水分率と摩擦力との関係を示すグラフである。試料Ｂは、残留水分率が８０％のときに摩擦力がピークの値を示す。また、試料Ａは、残留水分率によって摩擦力が大きく変化するが、試料Ｂは、残留水分率による摩擦力の変化は小さい。このように、試料の素材や構造によって、乾燥過程における残留水分率と摩擦力との関係は異なる。   FIG. 5A is a graph showing the relationship between the residual moisture content and the frictional force in the drying process of Sample A according to the embodiment. Sample A shows a peak value of the frictional force when the residual moisture content is 85%. FIG. 5B is a graph showing the relationship between the residual moisture content and the friction force in the drying process of Sample B according to the embodiment. Sample B shows a peak value of the frictional force when the residual moisture content is 80%. In addition, the frictional force of Sample A varies greatly depending on the residual moisture content, but in Sample B, the change in frictional force due to the residual moisture content is small. Thus, the relationship between the residual moisture content and the frictional force in the drying process varies depending on the material and structure of the sample.

本実施の形態に係る抱水量依存摩擦力測定装置１によれば、試料９の抱水量と摩擦力との関係を正確に測定することが可能になる。また、試料９の抱水量と摩擦力との関係を分析することで、試料９を生地材料とする衣料の着用時の、「べとつき」を評価することができる。   According to the water retention amount-dependent frictional force measuring apparatus 1 according to the present embodiment, the relationship between the water retention amount and the frictional force of the sample 9 can be accurately measured. Further, by analyzing the relationship between the water holding amount of the sample 9 and the frictional force, it is possible to evaluate “stickiness” when wearing a garment using the sample 9 as a fabric material.

本発明は、本発明の広義の精神と範囲を逸脱することなく、様々な実施の形態および変形が可能とされるものである。また、上述した実施の形態は、本発明を説明するためのものであり、本発明の範囲を限定するものではない。本発明の範囲は、実施の形態ではなく、特許請求の範囲によって示される。そして、特許請求の範囲内およびそれと同等の発明の意義の範囲内で施される様々な変形が、本発明の範囲内とみなされる。   Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. The scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

１ 抱水量依存摩擦力測定装置
２ 天秤支持部
３ 天秤
４ 計測治具
５ 摩擦子
６，６ａ，６ｂ 駆動部
７ 柱状部材
７ａ 上部柱状部材
７ｂ 下部柱状部材
８ 記憶装置
９ 試料
Ｒ，Ｔ 矢印1 Water content dependent friction force measuring device
2 Balance support part
3 Balance
4 Measuring jig
5 Friction elements 6, 6a, 6b Drive unit
7 Columnar members
7a Upper columnar member
7b Lower columnar member
8 Storage device
9 Sample R, T Arrow

Claims (15)

可撓性および抱水性を有するシート状の試料を、広げて吊り下げた状態で収容しうる空間を形成する天秤支持部と、
前記天秤支持部の上に支持される天秤と、
前記天秤の計量皿支持部から吊り下げられ、前記天秤支持部が形成する空間内に前記試料を広げて吊り下げた状態で保持する計測治具と、
中心軸の周りの回転面であって、円柱面である場合を含む回転楕円面の一部を有し、前記回転楕円面が前記計測治具に保持された前記試料のシート面に対向して、前記中心軸が前記計測治具に保持された前記試料のシート面に平行でかつ水平に支持され、前記計測治具に保持された前記試料に接触しない第１位置と、前記計測治具に保持された前記試料のシート面に前記回転楕円面が接触する第２位置との間を、前記中心軸に直交する面の中で前記シート面に交わる方向に平行移動可能であり、前記第２位置で、前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転可能である摩擦子と、
を備え、
前記天秤は、前記摩擦子が前記第１位置にあるときの指示値、および、前記摩擦子が前記第２位置で前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転するときの指示値を出力する抱水量依存摩擦力測定装置。A balance support part that forms a space that can accommodate a sheet-like sample having flexibility and water-holding property in a state where the sample is spread and suspended; and
A scale supported on the scale support;
A measuring jig that is suspended from the weighing pan support portion of the balance and holds the sample in a suspended state in a space formed by the balance support portion, and
A rotating surface around a central axis, having a part of a rotating ellipsoid including a cylindrical surface, the rotating ellipsoid facing the sheet surface of the sample held by the measuring jig A first position where the central axis is parallel to and horizontally supported by a sheet surface of the sample held by the measurement jig and does not contact the sample held by the measurement jig; and It is possible to translate between the second position where the spheroidal surface is in contact with the held sheet surface of the sample in a direction intersecting the sheet surface among the surfaces orthogonal to the central axis, A position where the portion in contact with the sample is rotatable in the direction of gravity with the central axis as a rotation axis;
With
The balance is an indication value when the friction element is at the first position, and a portion where the friction element contacts the sample at the second position rotates in the direction of gravity with the central axis as a rotation axis. A water-amount-dependent frictional force measuring device that outputs the indicated value. 前記摩擦子の前記回転楕円面は、円柱面である請求項１に記載の抱水量依存摩擦力測定装置。   The water retention amount-dependent frictional force measuring device according to claim 1, wherein the spheroid of the friction element is a cylindrical surface. 前記天秤は、前記摩擦子が前記試料のシート面に接触してから前記第２位置での回転を開始する前までの指示値と、前記摩擦子が前記第２位置での回転を終了してから前記試料のシート面から離れるまでの指示値とをさらに出力する請求項１または２に記載の抱水量依存摩擦力測定装置。   The balance includes an indication value from when the friction element contacts the sheet surface of the sample and before starting rotation at the second position, and when the friction element finishes rotating at the second position. The water retention amount-dependent frictional force measuring device according to claim 1 or 2, further outputting an instruction value until the sample separates from the sheet surface of the sample. 前記天秤は、前記摩擦子が前記第２位置への移動を終了してから前記第２位置での回転を開始する前までの指示値をさらに出力する請求項１から３のいずれか１項に記載の抱水量依存摩擦力測定装置。   The balance according to any one of claims 1 to 3, wherein the balance further outputs an instruction value from when the friction element finishes moving to the second position to before starting rotation at the second position. The water content-dependent frictional force measuring device described. 前記天秤は、前記摩擦子が前記第２位置での回転を終了してから前記第１位置への移動を開始する前までの指示値をさらに出力する請求項１から４のいずれか１項に記載の抱水量依存摩擦力測定装置。   The balance according to any one of claims 1 to 4, wherein the balance further outputs an instruction value from when the friction element finishes rotating at the second position to before starting to move to the first position. The water content-dependent frictional force measuring device described. 前記試料のシート面に対して前記摩擦子の反対側に中心軸が前記シート面に平行でかつ水平に支持され、前記摩擦子が前記第１位置にある時は前記試料に接触せず、前記摩擦子が前記第２位置にある時は前記試料に接触する柱状部材を備える請求項１から５のいずれか１項に記載の抱水量依存摩擦力測定装置。   A central axis is parallel to the sheet surface and horizontally supported on the opposite side of the friction surface with respect to the sheet surface of the sample, and when the friction element is in the first position, the sample does not contact the sample, The water retention amount-dependent friction force measuring device according to claim 1, further comprising a columnar member that contacts the sample when the friction element is in the second position. 前記柱状部材は、前記第２位置にあるときの前記摩擦子の中心軸よりも上に配置される上部柱状部材と、前記第２位置にあるときの前記摩擦子の中心軸よりも下に配置される下部柱状部材とを含む請求項６に記載の抱水量依存摩擦力測定装置。   The columnar member is disposed above the central axis of the friction element when in the second position, and the upper columnar member is disposed below the central axis of the friction element when in the second position. The water retention amount-dependent frictional force measuring device according to claim 6, comprising a lower columnar member. 前記柱状部材は、円柱形であって、該円柱形の中心軸の周りに自由回転可能に支持される請求項６または７に記載の抱水量依存摩擦力測定装置。   The water retention amount-dependent frictional force measuring device according to claim 6 or 7, wherein the columnar member has a cylindrical shape and is supported so as to be freely rotatable around a central axis of the cylindrical shape. 前記摩擦子は、前記第１位置から前記第２位置に移動するまでの間は、前記摩擦子の中心軸の周りに自由回転可能に支持される請求項１から８のいずれか１項に記載の抱水量依存摩擦力測定装置。   9. The friction element according to claim 1, wherein the friction element is supported so as to be freely rotatable around a central axis of the friction element until the friction element moves from the first position to the second position. For measuring the amount of water-dependent friction force. 前記摩擦子は、前記第１位置から前記第２位置に移動するまでの間は、前記摩擦子の中心軸の周りに回転不能または回転角度が制限されて支持される請求項１から８のいずれか１項に記載の抱水量依存摩擦力測定装置。   9. The friction element according to claim 1, wherein the friction element is supported around the central axis of the friction element so that it cannot rotate or has a limited rotation angle until the friction element moves from the first position to the second position. The water content-dependent frictional force measuring device according to claim 1. 前記摩擦子を前記第１位置から前記第２位置に移動させ、前記第２位置で前記摩擦子の中心軸の周りに回転させ、前記第２位置で回転させた後に前記第１位置に移動させる駆動部を備える請求項１から１０のいずれか１項に記載の抱水量依存摩擦力測定装置。   The friction element is moved from the first position to the second position, rotated around the central axis of the friction element at the second position, and rotated at the second position and then moved to the first position. The water retention amount-dependent frictional force measuring device according to any one of claims 1 to 10, further comprising a drive unit. 前記駆動部は、前記摩擦子を前記第１位置から前記第２位置に移動させ、前記第２位置で前記摩擦子の中心軸の周りに回転させ、前記第２位置で回転させた後に前記第１位置に移動させる動作を２回以上繰り返す請求項１１に記載の抱水量依存摩擦力測定装置。   The driving unit moves the friction element from the first position to the second position, rotates the friction element around a central axis of the friction element at the second position, and rotates the friction element at the second position. The water retention amount-dependent frictional force measuring apparatus according to claim 11, wherein the movement to one position is repeated twice or more. 前記天秤が出力する指示値を記録する記憶装置を備える請求項１から１２のいずれか１項に記載の抱水量依存摩擦力測定装置。   The water retention amount-dependent friction force measuring device according to any one of claims 1 to 12, further comprising a storage device that records an instruction value output by the balance. 前記計測治具に保持された前記試料に水分を付与する給水装置を備える請求項１から１３のいずれか１項に記載の抱水量依存摩擦力測定装置。   The water retention amount-dependent frictional force measuring device according to any one of claims 1 to 13, further comprising a water supply device that applies moisture to the sample held by the measuring jig. 可撓性および抱水性を有するシート状の試料を、広げて吊り下げた状態で収容しうる空間を形成する天秤支持部の上に支持される天秤の計量皿支持部から吊り下げられ、前記天秤支持部が形成する空間内に前記試料を広げて吊り下げた状態で保持する計測治具に前記試料に水分を付与して保持させ、
中心軸の周りの回転面であって、円柱面である場合を含む回転楕円面の一部を有し、前記回転楕円面が前記計測治具に保持された前記試料のシート面に対向して、前記中心軸が前記計測治具に保持された前記試料のシート面に平行でかつ水平に支持される摩擦子を前記計測治具に保持された前記試料に接触しない第１位置から、前記計測治具に保持された前記試料のシート面に前記回転楕円面が接触する第２位置に、前記中心軸に直交する面の中で前記シート面に交わる方向に平行移動させ、
前記摩擦子を、前記第２位置で、前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転させ、
前記天秤が出力する、前記摩擦子が前記第１位置にあるときの指示値と、前記摩擦子が前記第２位置で前記試料に接触した部分が重力方向に前記中心軸を回転軸として回転するときの指示値とを記録する抱水量依存摩擦力測定方法。A sheet-like sample having flexibility and water repellency is suspended from a weighing pan support portion of a balance supported on a balance support portion that forms a space that can be accommodated in an unfolded and suspended state. Moisture is applied to the sample and held in a measurement jig that holds the sample in a state where the sample is spread and suspended in the space formed by the support part,
A rotating surface around a central axis, having a part of a rotating ellipsoid including a cylindrical surface, the rotating ellipsoid facing the sheet surface of the sample held by the measuring jig From the first position where the center axis is parallel to the sheet surface of the sample held by the measurement jig and supported horizontally, the friction element is not in contact with the sample held by the measurement jig. To the second position where the spheroidal surface comes into contact with the sheet surface of the sample held by the jig, in the plane orthogonal to the central axis, in a direction intersecting the sheet surface,
The friction element is rotated at the second position where the portion in contact with the sample is in the direction of gravity with the central axis as a rotation axis.
The indication value when the friction element is in the first position, which is output from the balance, and the portion where the friction element contacts the sample at the second position rotate in the direction of gravity with the central axis as the rotation axis. A method for measuring the amount of water-dependent friction force that records the indicated value at the time.
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