JPWO2020184197A1 - Material tester and connection jig - Google Patents

Material tester and connection jig Download PDF

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JPWO2020184197A1
JPWO2020184197A1 JP2021504912A JP2021504912A JPWO2020184197A1 JP WO2020184197 A1 JPWO2020184197 A1 JP WO2020184197A1 JP 2021504912 A JP2021504912 A JP 2021504912A JP 2021504912 A JP2021504912 A JP 2021504912A JP WO2020184197 A1 JPWO2020184197 A1 JP WO2020184197A1
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JP7168065B2 (en
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知佳 大矢
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Shimadzu Corp
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Abstract

材料試験機は、固定部材である基台に対して負荷軸に沿って移動する移動部材を有する負荷枠内に管状の試験体（１０）を配置して引張試験を実行する材料試験機であって、試験体（１０）の内壁と係合する係合部と、係合部の両端に配設され負荷枠に接続される一対の接続部と、を有し、試験体（１０）を負荷枠に接続するための接続治具（３０）を備える。The material testing machine is a material testing machine that executes a tensile test by arranging a tubular test piece (10) in a load frame having a moving member that moves along a load axis with respect to a base that is a fixing member. The test piece (10) is loaded with an engaging portion that engages with the inner wall of the test piece (10) and a pair of connecting parts that are arranged at both ends of the engaging portion and connected to the load frame. A connection jig (30) for connecting to the frame is provided.

Description

この発明は、材料試験機および接続治具に関する。 The present invention relates to a material testing machine and a connecting jig.

内側が空洞になっている管状体（チューブ）の強度を評価するための試験として、材料試験機を用いた引張試験が知られている。管状体に対する引張試験は、例えば、熱可塑性プラスチック管の引張特性を測定するための規格（ＪＩＳ６８１５−１）に沿って実行される。引張試験の試験片は、管から短冊を切り取ることにより作成される。 As a test for evaluating the strength of a tubular body (tube) having a hollow inside, a tensile test using a material tester is known. Tensile tests on tubulars are performed, for example, according to a standard for measuring tensile properties of thermoplastic tubing (JIS6815-1). Specimens for tensile testing are made by cutting strips from a tube.

管状体のうち、例えば、人工血管材料では、血管の血流の方向（管軸方向）と血流の方向に直交する方向（周軸方向）について、引張試験が行われる。シート状にして引張試験を行うと、血管の生理状態の形状と異なるため、試験結果の評価が難しい場合がある。血管内に挿入されるカテーテル材料の引張試験として、チューブをチャック間距離が５０ｍｍとなるように、材料試験機のチャックにセットし、チューブ長手方向に引張試験力を与えて、伸びとその時の応力値を測定する試験が知られている（特許文献１参照）。人工血管材料の血管の管軸方向の強度の評価については、特許文献１に示された評価方法が採用される。また、人工血管材料の周軸方向の強度の評価においては、Ｌ字型の治具に試験用の長さに切った人工血管を通し、Ｌ字型の治具を引き離す引張試験を引張試験機にて実行することで、周軸破断強度と周軸破断伸度を測定している（特許文献２参照）。 Among the tubular bodies, for example, in the artificial blood vessel material, a tensile test is performed in a direction orthogonal to the blood flow direction (tube axis direction) and the blood flow direction (circumferential axis direction) of the blood vessel. When a tensile test is performed in the form of a sheet, it may be difficult to evaluate the test results because the shape of the blood vessel is different from the physiological state. As a tensile test of the catheter material inserted into the blood vessel, the tube is set on the chuck of the material testing machine so that the distance between the chucks is 50 mm, and a tensile test force is applied in the longitudinal direction of the tube to stretch and stress at that time. A test for measuring a value is known (see Patent Document 1). As for the evaluation of the strength of the artificial blood vessel material in the tube axis direction, the evaluation method shown in Patent Document 1 is adopted. In addition, in the evaluation of the strength of the artificial blood vessel material in the circumferential axis direction, a tensile test is performed by passing an artificial blood vessel cut to a test length through an L-shaped jig and pulling the L-shaped jig apart. The peripheral axis breaking strength and the peripheral axis breaking elongation are measured in (see Patent Document 2).

特許第６２４４４９０号公報Japanese Patent No. 6244490 特開２０１７−３２０号公報Japanese Unexamined Patent Publication No. 2017-320

管状体の強度を評価するための引張試験では、使用時に近い状態で試験を行いたいという要請がある。また、人工血管材料など、生体内での利用が予定される材料では、実験動物から採取された血管などの生体試料との比較試験も行われる。生体試料の試験を行うときには、試料を湿潤状態に保った状態にすることが求められている。そして、人工材料の引張試験においても、生体試料と同様の湿潤状態にて試験が実行されることを求められる。 In the tensile test for evaluating the strength of a tubular body, there is a request that the test should be performed in a state close to that at the time of use. In addition, for materials that are planned to be used in vivo, such as artificial blood vessel materials, comparative tests with biological samples such as blood vessels collected from experimental animals are also conducted. When testing a biological sample, it is required to keep the sample in a moist state. Further, in the tensile test of the artificial material, it is required that the test is carried out in the same wet state as the biological sample.

管状体の周軸方向の引張特性を評価するために、引張試験を実行する材料試験機に、特許文献２に記載のＬ字型の治具を用いて、湿潤状態の管状体を試験体として取り付けた場合には、試験体が水分を含んでいることにより滑りやすくなっており、試験の途中でＬ字型の治具から試験体が外れることがある。 In order to evaluate the tensile properties of the tubular body in the circumferential axis direction, a wet tubular body is used as a test body by using an L-shaped jig described in Patent Document 2 as a material testing machine for performing a tensile test. When attached, the test piece is slippery due to the water content, and the test piece may come off from the L-shaped jig during the test.

この発明は、上記課題を解決するためになされたものであり、管状の試験体に対して周軸方向の試験を容易に行うことが可能な材料試験機および接続治具を提供することを目的とする。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a material tester and a connection jig capable of easily performing a circumferential test on a tubular test piece. And.

本発明の第１の態様は、固定部材に対して負荷軸に沿って移動する移動部材を有する負荷枠内に管状の試験体を配置して引張試験を実行する材料試験機であって、前記試験体の内壁と係合する係合部と、棒状体により前記係合部の両端に一体的に形成され、前記負荷枠に接続される一対の接続部と、を有し、前記試験体を前記負荷枠に接続するための接続治具を備える材料試験機に関する。 A first aspect of the present invention is a material testing machine for performing a tensile test by arranging a tubular test piece in a load frame having a moving member that moves along a load axis with respect to a fixed member. The test piece is provided with an engaging portion that engages with the inner wall of the test body and a pair of connecting portions that are integrally formed at both ends of the engaging portion by a rod-shaped body and are connected to the load frame. The present invention relates to a material testing machine provided with a connection jig for connecting to the load frame.

本発明によれば、管状の試験体に対して周軸方向の試験を容易に行うことが可能な材料試験機および接続治具が提供される。 INDUSTRIAL APPLICABILITY According to the present invention, there is provided a material tester and a connection jig capable of easily performing a test in the circumferential direction on a tubular test piece.

この発明の実施形態に係る材料試験機の側面概要図である。It is a side view of the side surface of the material testing machine which concerns on embodiment of this invention. 接続治具３０の説明図である。It is explanatory drawing of the connection jig 30. 接続治具３０の使用の状態を説明する斜視図である。It is a perspective view explaining the use state of the connection jig 30.

以下、この発明の実施の形態を図面に基づいて説明する。図１は、この発明の実施形態に係る材料試験機の側面概要図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a material testing machine according to an embodiment of the present invention.

この材料試験機は、固定部材である基台１３と、基台１３に立設された支柱１１と、支柱１１に対して回転可能に固定されたねじ棹１５を有する。基台１３内には、ねじ棹１５の一端が連結されたモータ１４が配置されている。モータ１４は、制御部１８からの指令信号により駆動し、ねじ棹１５を回転させる。制御部１８には、この材料試験機を制御するためのプログラムを記憶する記憶装置と、当該プログラムを動作させるための演算装置が配置されている。ねじ棹１５にはナット（図示せず）を介して移動部材１２が配設されている。この移動部材１２は、モータ１４の駆動によりねじ棹１５が回転することで、図１に矢印１０１で示すように、直線的に移動する。移動部材１２にはロードセル１６が配設されている。そして、移動部材１２には、ロードセル１６を介して、上つかみ具２１が配設されている。 This material testing machine has a base 13 which is a fixing member, a support column 11 erected on the base base 13, and a screw rod 15 rotatably fixed to the support column 11. A motor 14 to which one end of a screw rod 15 is connected is arranged in the base 13. The motor 14 is driven by a command signal from the control unit 18 to rotate the screw rod 15. The control unit 18 is provided with a storage device for storing a program for controlling the material testing machine and an arithmetic unit for operating the program. A moving member 12 is arranged on the screw rod 15 via a nut (not shown). The moving member 12 moves linearly as shown by an arrow 101 in FIG. 1 when the screw rod 15 is rotated by the drive of the motor 14. A load cell 16 is arranged on the moving member 12. Then, the upper gripping tool 21 is arranged on the moving member 12 via the load cell 16.

基台１３には、試験の目的に応じたつかみ具、および、圧縮試験の試験体を載置する試料台などの試験評価治具を固定するための固定部１７が設けられている。この実施形態においては、この固定部１７に、下つかみ具２２がボルトなどの締結部材により固定されている。なお、この明細書において、治具は、試験の為に試験体を材料試験機の負荷枠内の試験位置に配置するための器具を指し、上つかみ具２１および下つかみ具２２に換えて、移動部材１２および固定部１７に取り付けられるものだけでなく、上つかみ具２１および下つかみ具２２に追加で取り付けられるものも含む。 The base 13 is provided with a gripping tool according to the purpose of the test and a fixing portion 17 for fixing a test evaluation jig such as a sample table on which a test piece for a compression test is placed. In this embodiment, the lower gripper 22 is fixed to the fixing portion 17 by a fastening member such as a bolt. In this specification, the jig refers to an instrument for arranging the test piece at the test position in the load frame of the material testing machine for the test, and is replaced with the upper gripping tool 21 and the lower gripping tool 22. Not only those attached to the moving member 12 and the fixing portion 17, but also those attached additionally to the upper gripping tool 21 and the lower gripping tool 22 are included.

支柱１１には、操作部１９が配設されている。操作部１９は、支柱１１に対して高さと角度を調整可能に取り付けられている。操作部１９には、表示部および複数の操作ボタンが配置され、移動部材１２のジョグ操作や試験開始および停止などのユーザによる入力を受け付ける。ユーザによる操作部１９からの入力は、制御部１８に入力され、ユーザの操作に応じてモータ１４を駆動させる。 An operation unit 19 is arranged on the support column 11. The operation unit 19 is attached to the support column 11 so that its height and angle can be adjusted. The operation unit 19 is arranged with a display unit and a plurality of operation buttons, and receives input by the user such as a jog operation of the moving member 12 and a test start and stop. The input from the operation unit 19 by the user is input to the control unit 18 and drives the motor 14 according to the operation of the user.

基台１３、ねじ棹１５および移動部材１２は、この材料試験機の負荷枠を構成し、上つかみ具２１と下つかみ具２２は、ねじ棹１５の回転軸と平行な負荷軸上に配置される。上つかみ具２１と下つかみ具２２は、負荷枠に対して試験体を接続するための接続部材である。試験体は、移動部材１２側に連結された上つかみ具２１と基台１３側に固定された下つかみ具２２との間の試験位置に配置される。そして、材料試験機の制御部１８が、モータ１４を駆動して負荷軸に沿って移動部材１２を移動させることにより、試験体に所定の試験力が与えられる。このときの試験力はロードセル１６により検出され、操作部１９の表示部に表示される。 The base 13, the screw rod 15, and the moving member 12 constitute a load frame for this material testing machine, and the upper grip 21 and the lower grip 22 are arranged on a load shaft parallel to the rotation axis of the screw rod 15. Ru. The upper gripping tool 21 and the lower gripping tool 22 are connecting members for connecting the test piece to the load frame. The test body is arranged at a test position between the upper gripping tool 21 connected to the moving member 12 side and the lower gripping tool 22 fixed to the base 13 side. Then, the control unit 18 of the material tester drives the motor 14 to move the moving member 12 along the load shaft, whereby a predetermined test force is given to the test piece. The test force at this time is detected by the load cell 16 and displayed on the display unit of the operation unit 19.

微小な管状体（例えば、管径が１０ｍｍよりも小さいもの）を試験体とし、管状の形状を保持した状態で、周軸方向に破断強度を評価するための引張試験を行うときに使用する接続治具について説明する。図２は、接続治具３０の説明図である。図３は、接続治具３０の使用の状態を説明する斜視図である。 A connection used when performing a tensile test to evaluate the breaking strength in the circumferential axis direction with a minute tubular body (for example, one having a tube diameter smaller than 10 mm) as a test body and maintaining the tubular shape. The jig will be described. FIG. 2 is an explanatory diagram of the connection jig 30. FIG. 3 is a perspective view illustrating a state in which the connection jig 30 is used.

この接続治具３０は、管状の試験体１０を負荷枠内の試験位置に配置するために、上つかみ具２１および下つかみ具２２に追加して使用するものである。この接続治具３０は、試験体１０の内壁に係合する係合部３１と、係合部３１の両端に配設され負荷枠に接続される一対の接続部３２とから成る。接続治具３０の係合部３１と一対の接続部３２は、金属の棒状体を屈曲させて一体的に形成されている。接続治具３０は、Ｕ字状の形状を有し、Ｕ字の底部分が係合部３１に相当する。なお、このＵ字状の形状には、係合部３１が直線のもの、および、一対の接続部３２の端部がさらに屈曲しているもの、係合部３１と接続部３２との間の屈曲が直角のものも含む。接続治具３０を形成する棒状体は、引張試験力に対して変形を生じない強度を持ち、かつ、試験体１０の内径に対して、２本分を挿入可能な細さのものであればよい。接続治具３０は金属の棒状体に限らず、例えば、樹脂により一体的に成形したものであってもよい。 This connection jig 30 is used in addition to the upper gripping tool 21 and the lower gripping tool 22 in order to arrange the tubular test body 10 at the test position in the load frame. The connection jig 30 includes an engaging portion 31 that engages with the inner wall of the test body 10 and a pair of connecting portions 32 that are arranged at both ends of the engaging portion 31 and are connected to the load frame. The engaging portion 31 of the connecting jig 30 and the pair of connecting portions 32 are integrally formed by bending a metal rod-shaped body. The connection jig 30 has a U-shape, and the bottom portion of the U-shape corresponds to the engaging portion 31. In this U-shape, the engaging portion 31 is straight, the ends of the pair of connecting portions 32 are further bent, and the engaging portion 31 and the connecting portion 32 are between the engaging portion 31 and the connecting portion 32. Including those with right-angled bends. The rod-shaped body forming the connecting jig 30 has a strength that does not cause deformation with respect to the tensile test force, and is thin enough to insert two pieces with respect to the inner diameter of the test body 10. good. The connection jig 30 is not limited to a metal rod-shaped body, and may be integrally molded with, for example, a resin.

引張試験の試験対象とする管状の試験体１０には、実験動物から採取した血管などの管状の生体試料、および、人工血管材料などが含まれる。管軸方向に長尺な試験体１０は、試験用の試料として、例えば、管軸方向が１０ｍｍ程度の長さに切りそろえられたものが調製される。生体試料は元来水分を含んでおり、湿潤状態で試験を行うため、試験体１０には接続治具３０に装着する前に、十分に水分を含ませておく。また、人工血管材料なども、使用状態と同等の湿潤状態で試験を行うため、水分を含ませた状態で接続治具３０に装着する。なお、この実施形態では、係合部３１と接続部３２との間の屈曲部分にアール曲線を設けることで、試験体１０の空洞に接続部３２の端部を通し、試験体１０を係合部３１まで移動させるのをスムーズに行うことを可能としている。 The tubular test piece 10 to be tested in the tensile test includes a tubular biological sample such as a blood vessel collected from an experimental animal, an artificial blood vessel material, and the like. The test piece 10 having a long length in the tube axis direction is prepared as a sample for testing, for example, one cut into a length of about 10 mm in the tube axis direction. Since the biological sample originally contains water and the test is performed in a wet state, the test body 10 is sufficiently moistened before being attached to the connection jig 30. In addition, since the artificial blood vessel material and the like are also tested in a wet state equivalent to that in use, they are attached to the connection jig 30 in a state of being moistened. In this embodiment, by providing a rounded curve in the bent portion between the engaging portion 31 and the connecting portion 32, the end portion of the connecting portion 32 is passed through the cavity of the test body 10 and the test body 10 is engaged. It is possible to smoothly move the unit to the unit 31.

２つの接続治具３０を管の内壁に係合部３１が当接するように試験体１０に装着し、各一対の接続部３２を、上つかみ具２１と下つかみ具２２に把持させる。これにより、試験体１０が上つかみ具２１と下つかみ具２２の間の試験位置に配置される（図３参照）。試験体１０が試験位置に配置された状態で、引張試験を実行すると、制御部１８によるモータ１４の駆動により移動部材１２が上方向に移動し、引張試験力が試験体１０に与えられる。 The two connecting jigs 30 are attached to the test body 10 so that the engaging portion 31 abuts on the inner wall of the pipe, and each pair of connecting portions 32 is gripped by the upper gripping tool 21 and the lower gripping tool 22. As a result, the test body 10 is arranged at the test position between the upper gripping tool 21 and the lower gripping tool 22 (see FIG. 3). When the tensile test is executed with the test body 10 placed at the test position, the moving member 12 is moved upward by the drive of the motor 14 by the control unit 18, and the tensile test force is applied to the test body 10.

なお、この実施形態の上つかみ具２１と下つかみ具２２は、一対のくさび形つかみ歯を有するつかみ具であるが、平面形つかみ歯のつかみ具であってもよい。つかみ歯を動かす把持機構は、油圧式、ねじ式、空気式など、いずれであってもよい。また、つかみ歯は、一対の接続部３２を把持でき、かつ、試験中に接続部３２とつかみ歯の歯面との間に滑りが生じなければ、歯面にヤスリ目が形成されたものの他、弾性材が貼られたラバーコート歯、あるいは歯面が平坦なつかみ歯などを選択することができる。 The upper gripping tool 21 and the lower gripping tool 22 of this embodiment are gripping tools having a pair of wedge-shaped gripping teeth, but may be gripping tools of flat-shaped gripping teeth. The gripping mechanism for moving the gripping teeth may be hydraulic, screw, pneumatic or the like. Further, if the gripping tooth can grip the pair of connecting portions 32 and no slip occurs between the connecting portion 32 and the tooth surface of the gripping tooth during the test, the tooth surface is not the one in which a file is formed. , Rubber-coated teeth with elastic material, or grip teeth with a flat tooth surface can be selected.

この実施形態の接続治具３０では、一対の接続部３２を設け、接続部３２で係合部３１の両端を閉じることで、水分を含んだことで滑りやすくなっている試験体１０が、試験の途中で接続治具３０から脱落することを防ぐことができる。これにより、試験体１０の位置を安定させ、湿潤状態での引張試験を確実に実行することが可能となる。接続治具３０は、上つかみ具２１および下つかみ具２２に対して容易に取り外しができることから、洗浄が容易にでき、清潔に保つことができる。 In the connection jig 30 of this embodiment, a pair of connection portions 32 are provided, and both ends of the engagement portion 31 are closed by the connection portion 32, so that the test body 10 which is slippery due to containing water is tested. It is possible to prevent the connection jig 30 from falling off in the middle of the process. This stabilizes the position of the test piece 10 and makes it possible to reliably carry out the tensile test in a wet state. Since the connecting jig 30 can be easily removed from the upper gripping tool 21 and the lower gripping tool 22, it can be easily washed and kept clean.

なお、上述した実施形態では、実験動物から採取した血管や人工血管材料を、管形状を保持し、かつ、湿潤状態で引張試験を行う例を説明したが、接続治具３０に装着する試験体１０は、これらの材料および試験環境に限定されない。滑りやすい素材や形状のオ−リングなども、この接続治具３０に装着して試験を実行することで、周軸方向の強度を評価することが可能となる。 In the above-described embodiment, an example in which a blood vessel or an artificial blood vessel material collected from an experimental animal is subjected to a tensile test while maintaining a tube shape and in a wet state has been described, but a test body to be attached to a connection jig 30 has been described. 10 is not limited to these materials and test environments. By mounting a slippery material or an oaring having a shape on the connection jig 30 and performing a test, it is possible to evaluate the strength in the circumferential axis direction.

また、上述した実施形態では、移動部材１２を直線移動させるねじ棹１５が１本の材料試験機を例に示したが、これに限定されない。例えば、一対のねじ棹を備え、同期して回転する一対のねじ棹に架設されたクロスヘッドを移動部材として負荷枠を構成する材料試験機であってもよい。 Further, in the above-described embodiment, the material testing machine having one screw rod 15 for linearly moving the moving member 12 is shown as an example, but the present invention is not limited thereto. For example, it may be a material testing machine having a pair of screw rods and constituting a load frame by using a crosshead erected on a pair of screw rods that rotate synchronously as a moving member.

（第１項）
第１の態様では、固定部材に対して負荷軸に沿って移動する移動部材を有する負荷枠内に管状の試験体を配置して引張試験を実行する材料試験機であって、前記試験体の内壁と係合する係合部と、棒状体により前記係合部の両端に一体的に形成され、前記負荷枠に接続される一対の接続部と、を有し、前記試験体を前記負荷枠に接続するための接続治具を備える。(Section 1)
The first aspect is a material testing machine for performing a tensile test by arranging a tubular test piece in a load frame having a moving member that moves along a load axis with respect to a fixed member. It has an engaging portion that engages with the inner wall and a pair of connecting portions that are integrally formed at both ends of the engaging portion by a rod-shaped body and are connected to the load frame, and the test piece is attached to the load frame. It is equipped with a connection jig for connecting to.

この態様によれば、試験体の内壁と係合する係合部と、係合部の両端に配設され前記負荷枠に接続される一対の接続部とを有する接続治具を備えることから、試験体を負荷枠に接続治具を介して接続でき、管状の試験体に対して周軸方向の試験を容易に行うことが可能な材料試験機が提供される。また、係合部の両端に対して接続部を設けることにより、滑りやすい試験体が試験中に係合部から脱落することが防止できる。 According to this aspect, since it is provided with a connection jig having an engaging portion that engages with the inner wall of the test piece and a pair of connecting portions that are arranged at both ends of the engaging portion and connected to the load frame. Provided is a material testing machine capable of connecting a test piece to a load frame via a connection jig and easily performing a circumferential test on a tubular test piece. Further, by providing the connecting portions at both ends of the engaging portion, it is possible to prevent the slippery test piece from falling off from the engaging portion during the test.

さらに、係合部と一対の接続部とが棒状体により一体的に形成されることにより、接続治具の部品点数を減らすことができる。 Further, since the engaging portion and the pair of connecting portions are integrally formed by the rod-shaped body, the number of parts of the connecting jig can be reduced.

（第２項）
第１の態様に係る実施形態では、第１項の材料試験機において、前記接続治具は、Ｕ字状の形状を有する。(Section 2)
In the embodiment according to the first aspect, in the material testing machine of the first aspect, the connection jig has a U-shaped shape.

このような構成により、接続治具の加工を容易に行うことができる。 With such a configuration, the connection jig can be easily processed.

（第３項）
第１の態様に係る実施形態では、第１項または第２項の材料試験機において、前記負荷枠における前記固定部材と前記移動部材には、連結部材が配設され、前記接続治具の前記係合部を前記試験体の内壁に係合させた状態で、前記一対の接続部を前記連結部材に接続させることにより、前記試験体を一対の前記接続治具により前記負荷枠内の試験位置に配置する。(Section 3)
In the embodiment according to the first aspect, in the material testing machine according to the first or second aspect, a connecting member is arranged on the fixing member and the moving member in the load frame, and the connecting jig is described. By connecting the pair of connecting portions to the connecting member in a state where the engaging portion is engaged with the inner wall of the test body, the test body is connected to the test body by the pair of the connecting jigs at the test position in the load frame. Place in.

このような構成により、連結部材を介することにより接続治具の材料試験機への着脱を容易にし、接続治具の洗浄を容易に行うことができる。 With such a configuration, the connecting jig can be easily attached to and detached from the material testing machine via the connecting member, and the connecting jig can be easily cleaned.

（第４項）
第１の態様に係る実施形態では、第３項の材料試験機において、前記連結部材は、前記固定部材と前記移動部材の各々に連結されるつかみ具である。(Section 4)
In the embodiment according to the first aspect, in the material testing machine of the third aspect, the connecting member is a gripping tool connected to each of the fixing member and the moving member.

このような構成により、管軸方向の引張強度を評価する試験を行ったときのつかみ具を利用できることから、管状の試験体の管軸方向の引張試験と周軸方向の引張試験を、両者の試験の間に治具交換の時間を割くことなく、続けて行うことができる。これにより、全体の試験時間が短縮される。 With such a configuration, it is possible to use the gripping tool when conducting a test to evaluate the tensile strength in the tube axial direction. It can be continued without spending time for jig replacement during the test. This shortens the overall test time.

（第５項）
一態様に係る接続治具では、固定部材に対して負荷軸に沿って移動する移動部材を有する負荷枠内に管状の試験体を配置して引張試験を実行する材料試験機に使用される前記試験体を前記負荷枠に接続するための接続冶具であって、前記試験体の内壁と係合する係合部と、棒状体により前記係合部の両端に前記係合部と一体的に形成され、前記負荷枠に接続される一対の接続部と、を備えてもよい。(Section 5)
The connection jig according to one aspect is used in a material testing machine for performing a tensile test by arranging a tubular test piece in a load frame having a moving member that moves along a load axis with respect to a fixed member. A connecting jig for connecting the test piece to the load frame, which is integrally formed with the engaging part at both ends of the engaging part by a rod-shaped body and an engaging part that engages with the inner wall of the test piece. A pair of connecting portions that are connected to the load frame may be provided.

この態様によれば、係合部の両端に対して接続部を設けることにより、滑りやすい試験体が試験中に係合部から脱落することが防止できる。さらに、係合部と一対の接続部とが棒状体により一体的に形成されることにより、接続治具の部品点数を減らすことができる。 According to this aspect, by providing the connecting portions to both ends of the engaging portion, it is possible to prevent the slippery test piece from falling off from the engaging portion during the test. Further, since the engaging portion and the pair of connecting portions are integrally formed by the rod-shaped body, the number of parts of the connecting jig can be reduced.

なお、上述したこの発明の実施形態に関する記載は実施形態の説明のためのものであり、発明を限定するものではない。 The above-mentioned description of the embodiment of the present invention is for the purpose of explaining the embodiment, and does not limit the invention.

１０ 試験体
１１ 支柱
１２ 移動部材
１３ 基台
１４ モータ
１５ ねじ棹
１６ ロードセル
１７ 固定部
１８ 制御部
１９ 操作部
２１ 上つかみ具
２２ 下つかみ具
３０ 接続治具
３１ 係合部
３２ 接続部
１０１ 矢印10 Specimen 11 Strut 12 Moving member 13 Base 14 Motor 15 Screw rod 16 Load cell 17 Fixed part 18 Control part 19 Operation part 21 Upper gripping tool 22 Lower gripping tool 30 Connection jig 31 Engagement part 32 Connection part 101 Arrow

本発明に係る材料試験機は、固定部材に対して負荷軸に沿って移動する移動部材を有する負荷枠内に管状の試験体を配置して引張試験を実行する材料試験機であって、前記試験体の内壁と係合する係合部と、棒状体により前記係合部の両端に一体的に形成され、前記負荷枠に接続される一対の接続部と、を有し、Ｕ字状の形状を有する、前記試験体を前記負荷枠に接続するための接続治具を備える。 The material testing machine according to the present invention is a material testing machine for performing a tensile test by arranging a tubular test piece in a load frame having a moving member that moves along a load axis with respect to a fixed member. It has an engaging portion that engages with the inner wall of the test body, and a pair of connecting portions that are integrally formed at both ends of the engaging portion by a rod-shaped body and are connected to the load frame, and has a U-shape. having a shape, Ru with a connection jig for connecting the specimen to the load frame.

Claims (5)

固定部材に対して負荷軸に沿って移動する移動部材を有する負荷枠内に管状の試験体を配置して引張試験を実行する材料試験機であって、
前記試験体の内壁と係合する係合部と、
棒状体により前記係合部の両端に一体的に形成され、前記負荷枠に接続される一対の接続部と、
を有し、前記試験体を前記負荷枠に接続するための接続治具を備える材料試験機。A material testing machine that performs a tensile test by arranging a tubular test piece in a load frame having a moving member that moves along a load axis with respect to a fixed member.
An engaging portion that engages with the inner wall of the test piece,
A pair of connecting portions integrally formed at both ends of the engaging portion by a rod-shaped body and connected to the load frame,
A material testing machine comprising a connection jig for connecting the test piece to the load frame. 請求項１に記載の材料試験機において、
前記接続治具は、Ｕ字状の形状を有する材料試験機。In the material testing machine according to claim 1,
The connection jig is a material testing machine having a U-shape. 請求項１または請求項２に記載の材料試験機において、
前記負荷枠における前記固定部材と前記移動部材には、連結部材が配設され、
前記接続治具の前記係合部を前記試験体の内壁に係合させた状態で、前記一対の接続部を前記連結部材に接続させることにより、前記試験体を一対の前記接続治具により前記負荷枠内の試験位置に配置する材料試験機。In the material testing machine according to claim 1 or 2.
A connecting member is arranged on the fixing member and the moving member in the load frame.
By connecting the pair of connecting portions to the connecting member in a state where the engaging portion of the connecting jig is engaged with the inner wall of the test body, the test body is connected to the connecting member by the pair of the connecting jigs. Material testing machine to be placed at the test position in the load frame. 請求項３に記載の材料試験機において、
前記連結部材は、前記固定部材と前記移動部材の各々に連結されるつかみ具である材料試験機。In the material testing machine according to claim 3,
The connecting member is a material testing machine that is a gripping tool connected to each of the fixing member and the moving member. 固定部材に対して負荷軸に沿って移動する移動部材を有する負荷枠内に管状の試験体を配置して引張試験を実行する材料試験機に使用される前記試験体を前記負荷枠に接続するための接続冶具であって、
前記試験体の内壁と係合する係合部と、
棒状体により前記係合部の両端に前記係合部と一体的に形成され、前記負荷枠に接続される一対の接続部と、
を備える接続冶具。A tubular test piece is placed in a load frame having a moving member that moves along a load axis with respect to a fixed member, and the test piece used in a material testing machine for performing a tensile test is connected to the load frame. It is a connection jig for
An engaging portion that engages with the inner wall of the test piece,
A pair of connecting portions formed integrally with the engaging portions at both ends of the engaging portion by a rod-shaped body and connected to the load frame, and a pair of connecting portions.
A connection jig equipped with.
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