Material testing apparatus

Abstract

To provide a material testing apparatus capable of performing a friction test and a bending test while suppressing variations in test conditions.SOLUTION: A material testing apparatus 1 includes: a target holding part 11 for holding, as a test target, a sample material M11 having an elongated shape; a jig holding part 12 for holding a load-applying jig M12 having an elongated shape and configured to apply a friction load for rubbing the sample material M11 and a bending load for bending the sample material M11, in an attitude intersecting the sample material M11; and a moving mechanism 13 for applying the friction load and the bending load from the load-applying jig M12 to the sample material M11 by moving at least one of the target holding part 11 and the jig holding part 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a material testing device for performing a friction test and a bending test on a long sample material. [Background technology]

[0002] Conventionally, friction tests and bending tests have been carried out on long test materials such as metal wires, threads, etc. In many cases, friction tests are carried out using a test device dedicated to friction tests (see, for example, Patent Document 1), and bending tests are carried out using a test device dedicated to bending tests (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4064212 [Patent Document 2] Japanese Patent Application Publication No. 09-061327 Summary of the Invention [Problem to be solved by the invention]

[0004] When long materials are woven in a cross-woven pattern, each strand is subjected to both frictional loads caused by rubbing against each other at the intersections and bending loads caused by bending against each other at the intersections. In such cases, it is necessary to evaluate the durability of the long material by conducting both a friction test and a bending test. If the friction test and the bending test are performed using dedicated testing equipment, as described above, the test material must be transferred between the equipment. In this case, external factors may be introduced when the test material is transferred between the equipment, which may change the test conditions, for example, when the two tests are performed alternately.

[0005] An object of the present invention is to provide a material testing device that can perform friction tests and bending tests while suppressing changes in test conditions. [Means for solving the problem]

[0006] In order to solve the above problems, the material testing device is characterized by comprising an object holding section that holds a long-shaped test material as a test object, a jig holding section that holds a load-application jig that has a long shape and applies a frictional load that rubs against the test material and a bending load that bends the test material in an orientation that intersects with the test material, and a moving mechanism that applies the frictional load and the bending load from the load-application jig to the test material by moving at least one of the object holding section and the jig holding section.

[0007] According to the above-mentioned materials testing apparatus, the friction test and the bending test are performed on the test material by the movement mechanism moving at least one of the object holding unit and the jig holding unit. In other words, according to the above-mentioned materials testing apparatus, the friction test and the bending test on the test material are performed on a single materials testing apparatus, so that the friction test and the bending test can be performed while suppressing changes in test conditions that may occur due to equipment replacement, etc.

[0008] Here, it is preferable that the moving mechanism applies the frictional load to the loaded point on the test material that intersects with the load-application jig by moving the jig holding portion back and forth in a friction direction along the length direction of the load-application jig, and that the bending load is applied to the loaded point on the test material by moving the load-application jig held by the jig holding portion in a bending direction that intersects both the length direction of the test material and the friction direction, at least for the load side intersection portion that intersects with the test material.

[0009] According to this configuration, the friction test and bending test are performed at a single point, that is, the loaded point on the test material, so that changes in the test conditions can be further suppressed.

[0010] It is also preferable that the moving mechanism includes a friction moving mechanism that moves the jig holding portion back and forth in the friction direction, and a bending overall moving mechanism that moves the jig holding portion together with the friction moving mechanism in the bending direction, thereby moving the entire load-applying jig.

[0011] According to this configuration, the bending load is applied by moving the entire load application jig, including the jig holding portion and the friction movement mechanism, thereby simplifying the mechanism and reducing manufacturing costs.

[0012] It is also preferable that the moving mechanism includes a friction moving mechanism that moves the jig holding portion back and forth in the friction direction, and a bending partial moving mechanism that partially moves only the load side intersection portion of the load-applying jig in the bending direction.

[0013] According to this configuration, by configuring the bending portion moving mechanism to partially move only the load side intersection portion, the number of mechanical parts that operate during the bending test can be kept to a minimum, thereby making the device more compact.

[0014] Furthermore, it is preferable that the moving mechanism reciprocates the jig holding portion in a friction direction along the length direction of the load-application jig, thereby applying the frictional load to the frictional loaded point on the test material that intersects with the load-application jig, and moves at least the load-side intersecting portion that intersects with the test material on the load-application jig held by the jig holding portion so that the load-side intersecting portion extends in an intersecting extension direction that intersects both the length direction of the test material and the friction direction, and then moves the jig in a bending direction along the friction direction, thereby applying the bending load to the bending loaded point on the test material.

[0015] With this configuration, both the friction direction and the bending direction are along the length of the load application jig, so the movement mechanism is simplified and the device can be made smaller.

[0016] It is also preferable that the moving mechanism comprises a deformation moving mechanism that deforms the load-applying jig so that the load-side intersection portion extends in the intersection extension direction and moves the load-side intersection portion, and a common moving mechanism that moves the jig holding portion back and forth in the friction direction when the friction load is applied, and that moves the jig holding portion in the bending direction after the load-side intersection portion has moved when the bending load is applied.

[0017] According to this configuration, the reciprocating movement in the friction direction and the movement in the bending direction are performed by a common movement mechanism, which simplifies the mechanism and reduces manufacturing costs. [Effects of the Invention]

[0018] According to the above-described material testing device, it is possible to perform a friction test and a bending test while suppressing changes in the test conditions. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic diagram showing a material testing device according to a first embodiment. [Figure 2] 2 is a schematic diagram showing how a friction load is applied from a load-applying jig to a test material in the material testing device shown in FIG. 1, viewed from the direction of arrow V11 in FIG. 1. FIG. [Figure 3] 3 is a schematic diagram showing another example of the mode of applying a friction load shown in FIG. 2. FIG. [Figure 4] 2 is a schematic perspective view similar to FIG. 1 illustrating how a bending load is applied from a load-applying jig to a test material in the material testing apparatus shown in FIG. 1. FIG. [Figure 5] 5 is a schematic diagram showing the application of a bending load shown in FIG. 4, viewed from the direction of arrow V12 in FIG. [Figure 6] FIG. 10 is a schematic diagram illustrating the material testing device of the second embodiment, focusing on how a bending load is applied from a load application jig to a material under test. [Figure 7] 7 is a schematic diagram showing the manner in which the bending load shown in FIG. 6 is applied, viewed from the direction of arrow V21 in FIG. 6. FIG. [Figure 8] FIG. 10 is a schematic diagram illustrating a material testing device according to a third embodiment, focusing on the mechanism for applying a bending load from a load application jig to a material under test. [Figure 9] 9 is a schematic diagram showing movement of a load-side intersection portion due to deformation of the load application jig shown in FIG. 8. FIG. [Figure 10] 10A to 10C are schematic diagrams illustrating the operation of a transformation and movement mechanism for performing the transformation and movement shown in FIG. 9. [Figure 11] 9 is a schematic perspective view similar to that of FIG. 8 illustrating how a bending load is applied by a common moving mechanism in the material testing apparatus shown in FIG. 8. FIG. [Figure 12] 12 is a schematic diagram showing the manner in which a bending load is applied as shown in FIG. 11, viewed from the direction of arrow V31 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] A material testing device according to an embodiment of the present invention will be described below. First, a first embodiment will be described.

[0021] FIG. 1 is a schematic diagram showing a material testing device according to the first embodiment.

[0022] The material testing apparatus 1 of this embodiment is an apparatus for performing friction tests and bending tests on a long specimen M11 as a test object, and includes an object holder 11, a jig holder 12, and a movement mechanism 13. The object holder 11 is a portion for holding a long specimen M11, such as a metal wire or thread, as a test object. The object holder 11 includes a pair of specimen end holders 111 for holding both ends of the specimen M11. These specimen end holders 111 also serve to apply a certain tension to the specimen M11 by pulling it in the specimen length direction D11, which is its longitudinal direction. The jig holder 12 is a portion for holding a load-applying jig M12, which is a long specimen such as a metal wire or thread similar to the specimen M11. The load-applying jig M12 is a jig member that applies a friction load by rubbing the specimen M11 and a bending load by bending the specimen M11. The jig holding unit 12 has a pair of jig end holding units 121 that hold both ends of the load application jig M12, and also serves to apply a certain tension by pulling the load application jig M12 in its longitudinal direction, that is, the jig length direction D12, using this pair of jig end holding units 121. The movement mechanism 13 is a mechanical part that applies a frictional load and a bending load from the load application jig M12 to the test material M11 by moving at least one of the object holding unit 11 and the jig holding unit 12, in this embodiment, the jig holding unit 12.

[0023] Figure 2 is a schematic diagram showing how a friction load is applied from a load-applying jig to a test material in the material testing apparatus shown in Figure 1, as viewed from the direction of arrow V11 in Figure 1. Note that in Figure 2, the test material M11, which is drawn with approximately the same thickness as the load-applying jig M12 in Figure 1, is shown emphasized and thicker than the load-applying jig M12.

[0024] First, the movement mechanism 13 reciprocates the jig holder 12 in a friction direction D13 along the jig length direction D12, thereby applying a friction load to a loaded point P11 on the test material M11 that intersects with the load-applying jig M12. As shown in FIG. 1 , the movement mechanism 13 includes a friction movement mechanism 131 that reciprocates the jig holder 12 in the friction direction D13. The friction movement mechanism 131 includes a pair of friction jig end movement mechanisms 131a that are connected one-to-one to a pair of jig end holders 121 in the jig holder 12 and that reciprocate each jig end holder 121 in the friction direction D13. In the friction movement mechanism 131, the pair of friction jig end movement mechanisms 131a synchronize with each other to reciprocate each jig end holder 121 in the friction direction D13. This synchronized movement causes the load application jig M12 to move back and forth while maintaining tension from the jig holding portion 12, rubbing against the load-receiving point P11 of the material under test M11 and applying a frictional load.

[0025] In this embodiment, frictional load is applied by moving the jig holding portion 12, but as long as at least one of the object holding portion 11 and the jig holding portion 12 is moved, the following other example may also be used.

[0026] Figure 3 is a schematic diagram showing another example of the mode of applying a friction load shown in Figure 2. In Figure 3, components equivalent to those shown in Figures 1 and 2 are assigned the same reference numerals as in Figures 1 and 2, and redundant explanations of these equivalent components will be omitted below.

[0027] In the material testing apparatus 1-1 of the alternative example shown in FIG. 3, the movement mechanism 13-1 applies a friction load by moving the object holder 11 out of the object holder 11 and the jig holder 12. That is, the movement mechanism 13-1 includes a friction movement mechanism 131-1 that reciprocates the object holder 11 in a friction direction D13-1 along the object length direction D11 of the test material M11. The friction movement mechanism 131-1 of this alternative example includes a pair of friction specimen end movement mechanisms 131-1a that are connected one-to-one to a pair of specimen end holders 111 in the object holder 11 and reciprocate each specimen end holder 111 in the friction direction D13-1. In the friction movement mechanism 131-1, the pair of friction specimen end movement mechanisms 131-1a synchronize with each other to reciprocate each specimen end holder 111 in the friction direction D13-1. Due to this synchronous movement, the test material M11 moves back and forth while maintaining the tension from the object holding unit 11, while the load-receiving point P11 (FIG. 2) of the test material M11 is rubbed against the load-applying jig M12 held stationary by a pair of jig end holding units 121 of the jig holding unit 12. This rubbing applies a frictional load to the load-receiving point P11 of the test material M11.

[0028] Furthermore, the manner in which the friction load is applied is not limited to the manner in which only one of the object holder 11 and the jig holder 12 is moved, as in the first embodiment in Figures 1 and 2 and the alternative example in Figure 3, but may be a manner in which both the object holder 11 and the jig holder 12 are moved. In this case, the movement mechanism will include, as a friction movement mechanism, both a mechanism for reciprocating the test material M11 and a mechanism for reciprocating the load-applying jig M12.

[0029] Next, returning to the first embodiment shown in FIGS. 1 and 2, the application of a bending load from the load application jig M12 to the test material M11 will be described.

[0030] Fig. 4 is a schematic perspective view similar to Fig. 1 showing how a bending load is applied from a load-applying jig to a test material in the material testing apparatus shown in Fig. 1. Fig. 5 is a schematic view showing the application of the bending load shown in Fig. 4 as viewed from the direction of arrow V12 in Fig. 4. In Fig. 5, as in Fig. 2, the test material M11 is shown emphasized and thicker than the load-applying jig M12.

[0031] To apply a bending load, the movement mechanism 13 moves the load application jig M12 held by the jig holder 12 in a bending direction D14 at least along the load-side intersection portion where the load application jig M12 intersects with the material under test M11, which in this embodiment is the entire length of the load application jig M12. The bending direction D14 at this time intersects both the target length direction D11 of the material under test M11 and the above-mentioned friction direction D13, and is the direction in which the load application jig M12 presses and bends the material under test M11 from below in the figure. By moving the load application jig M12 in the bending direction D14 along its entire length, a bending load is applied to a loaded point P11 (FIG. 5) on the material under test M11.

[0032] In this embodiment, the movement mechanism 13 includes a friction movement mechanism 131 that moves the jig holder 12 using a pair of friction jig end movement mechanisms 131a, as well as a bending overall movement mechanism 132 that moves the jig holder 12 together with the friction movement mechanism 131 in the bending direction D14. The movement of the jig holder 12 by the bending overall movement mechanism 132 moves the entire length of the load application jig M12 in the bending direction D14. The bending overall movement mechanism 132 includes a pair of bending jig end movement mechanisms 132a that are provided one-to-one with the pair of jig end holders 121, i.e., one-to-one with the pair of friction jig end movement mechanisms 131a. In the bending overall movement mechanism 132, the pair of bending jig end movement mechanisms 132a move the jig end holders 121 and the friction jig end movement mechanisms 131a in synchronization with each other in the bending direction D14. This synchronized movement causes the load-applying jig M12 to move as a whole while maintaining tension from the jig holder 12, pushing up the loaded point P11 of the material under test M11 and applying a bending load. To return the bent material under test M11 to its original state, the pair of bending jig end moving mechanisms 132a synchronize with each other to move each jig end holder 121 and the friction jig end moving mechanism 131a in the direction opposite to the bending direction D14, thereby releasing the bending load. Furthermore, when repeatedly applying and releasing such bending loads to bend and stretch the material under test M11, movement in the bending direction D14 and movement in the opposite direction are alternately repeated.

[0033] In this embodiment, the bending load is applied by moving the jig holder 12, but as long as at least one of the object holder 11 and the jig holder 12 is moved, another example in which the bending load is applied by moving the object holder 11 may be adopted. Although illustration of this another example is omitted, in this example, the object holder 11, i.e., the material under test M11, is moved in the direction opposite to the bending direction D14 shown in Figures 4 and 5 and pressed against the load-applying jig M12. This pressing applies a bending load to the loaded point P11 of the material under test M11, and the material under test M11 is bent in the same manner as in Figures 4 and 5.

[0034] According to the material testing apparatus 1 of the first embodiment described above, the friction test and bending test are performed on the material under test M11 by the movement mechanism 13 moving the jig holder 12 (the object holder 11 in FIG. 3 and the other example described above). That is, according to the material testing apparatus 1 described above, the friction test and bending test on the material under test M11 are performed using a single material testing apparatus, and therefore the friction test and bending test can be performed while minimizing changes in test conditions that may occur when the apparatus is replaced, etc.

[0035] Furthermore, according to this embodiment, by moving the jig holder 12, the load application jig M12 can be made to intersect the material under test M11 at any position in the target length direction D11, and this arbitrary intersection point can be used as the load point P11 to perform a friction test and a bending test. Furthermore, by using the movement mechanism 13 to rotate the jig holder 12 (i.e., the load application jig M12) around the central axis of the material under test M11 held by the target holder 11, the intersection point between the material under test M11 and the load application jig M12, i.e., the load point P11, can be shifted in the circumferential direction around the central axis of the material under test M11. In other words, according to this embodiment, the friction test and the bending test can be performed at any load point P11 in this circumferential direction as well.

[0036] In this embodiment, the movement mechanism 13 applies a frictional load to the load point P11 by reciprocating the jig holder 12 in the friction direction D13, and applies a bending load to the load point P11 by moving the load-applying jig M12 over its entire length in the bending direction D14. With this configuration, the friction test and bending test are performed on a single point, the load point P11, on the test material M11, which further reduces changes in the test conditions.

[0037] Moreover, in this embodiment, the movement mechanism 13 includes a friction movement mechanism 131 that reciprocates the jig holding part 12, and a bending entire movement mechanism 132 that moves the entire load application jig M12 by moving the jig holding part 12 together with the friction movement mechanism 131. According to this configuration, by applying a bending load by moving the entire load application jig M12 together with the jig holding part 12 and the friction movement mechanism 131, it is possible to reduce manufacturing costs by simplifying the mechanism.

[0038] The above-described points also apply to other examples in which the friction load or bending load is applied by moving the object holder 11.

[0039] Next, a second embodiment will be described. This second embodiment differs from the first embodiment in the configuration of the mechanism that applies the bending load. The second embodiment will be described below, focusing on the differences from the first embodiment.

[0040] Fig. 6 is a schematic diagram of a materials testing apparatus according to a second embodiment, focusing on the application of a bending load from a load-applying jig to a test material. Fig. 7 is a schematic diagram of the application of the bending load shown in Fig. 6, viewed from the direction of arrow V21 in Fig. 6. As in Fig. 2, in Fig. 7, the test material M11 is highlighted in bolder than the load-applying jig M12. In Figs. 6 and 7, components equivalent to those shown in Figs. 1-2 and 4-5 are assigned the same reference numerals as in those figures, and redundant explanations of these equivalent components will be omitted below.

[0041] In the materials testing apparatus 2 of the second embodiment, a friction load is applied by the friction movement mechanism 131 of the movement mechanism 23 reciprocating the jig holder 12, as in the first embodiment. In contrast, a bending load is applied by the load application jig M12, unlike the first embodiment, by partially moving only the load-side intersection portion M121, which intersects with the test material M11 held by the object holder 11, in the bending direction D24. The movement mechanism 23 includes a bending portion moving mechanism 232 that partially moves the load-side intersection portion M121. The bending portion moving mechanism 232 includes a pair of fulcrum mechanisms 232a that move both ends of the load-side intersection portion M12, and each fulcrum mechanism 232a includes a pressure fulcrum 232a-1 and a push-in fulcrum 232a-2.

[0042] The pressure support fulcrum 232a-1 is a round-bar-shaped fulcrum component that supports the outer end portion of the load-side intersection portion M121 in the direction opposite to the bending direction D24 in the load-applying jig M12 to prevent movement in the bending direction D24. The push-in fulcrum 232a-2 is a round-bar-shaped fulcrum component that moves to push the inner end portion of the load-side intersection portion M121 in the bending direction D24. As the push-in fulcrum 232a-2 moves in the bending direction D24 while the pressure support fulcrum 232a-1 supports the outer end portion of the load-side intersection portion M121, the end portion of the load-side intersection portion M121 moves in the bending direction D24. As the pair of fulcrum mechanisms 232a perform such operations synchronously at both ends of the load-side intersection portion M121, the load-side intersection portion M121 moves in the bending direction D24.

[0043] At this time, the load application jig M12 is bent in the bending direction D24 at the outer side of the end of the load-side intersection portion M121 while being sandwiched between the pressure fulcrum 232a-1 and the push-in fulcrum 232a-2. As a result, the load application jig M12 is displaced along the bending direction D24 at the outer side of the end of the load-side intersection portion M121 by the amount of movement of the push-in fulcrum 232a-2, i.e., the amount of movement of the load-side intersection portion M121. As a result, the distance between the ends of the load application jig M12 is shortened. This shortening is achieved by the pair of friction jig end moving mechanisms 131a in the friction movement mechanism 131 moving the ends of the load application jig M12 closer to each other in an approaching direction D25 along the friction direction D13 in synchronization with the movement by the bending portion moving mechanism 232.

[0044] In this embodiment, the bending portion moving mechanism 232 moves the load-side intersection portion M121 in the bending direction D24 in this manner, thereby applying a bending load to the load-receiving point P11 ( FIG. 7 ), which is the intersection point of the material under test M11 with the load-side intersection portion M121. To return the bent material under test M11 to its original state, the bending portion moving mechanism 232 moves the load-side intersection portion M121 in the direction opposite to the bending direction D24 to release the bending load. At this time, the pair of friction jig end moving mechanisms 131a move the end of the load-applying jig M12 away from the approaching direction D25. When repeatedly applying and releasing the bending load to bend and straighten the material under test M11, movements in the bending direction D24 and the approaching direction D25 and movements in the opposite direction are alternately repeated.

[0045] It goes without saying that, similar to the first embodiment, the material testing device 2 of the second embodiment described above can also perform friction tests and bending tests while minimizing changes in test conditions that may occur due to device replacement, etc.

[0046] In this embodiment, as in the first embodiment, a friction test and a bending test can be performed at any loaded point P11 in the target length direction D11 of the test material M11. Furthermore, by using the moving mechanism 23 to rotate the jig holding unit 12 (i.e., the load-applying jig M12) around the central axis of the test material M11 held by the target holding unit 11, a friction test and a bending test can be performed at any loaded point P11 in the circumferential direction.

[0047] In this embodiment, the movement mechanism 23 includes a friction movement mechanism 131 and a bending portion movement mechanism 232 that partially moves only the load side intersection portion M121. With this configuration, the bending portion movement mechanism 232 is configured to partially move only the load side intersection portion M121, so that the number of mechanical portions that operate during a bending test can be minimized, thereby making it possible to miniaturize the device.

[0048] Next, a third embodiment will be described. This third embodiment also differs from the first embodiment in the configuration of the mechanism that applies the bending load. Hereinafter, the third embodiment will also be described, focusing on the differences from the first embodiment.

[0049] Figure 8 is a schematic diagram of a materials testing device according to a third embodiment, focusing on the mechanism for applying a bending load from a load-applying jig to a test material. In Figure 8, components equivalent to those shown in Figures 1-2 and 4-5 are assigned the same reference numerals as in those figures, and only those components necessary for explanation are given the same reference numerals. Below, a redundant explanation of these equivalent components will be omitted. This also applies to Figures 9-11, which will be referred to later.

[0050] In the material testing apparatus 3 of the third embodiment, a frictional load is applied by the movement mechanism 33 reciprocating the jig holder 12, as in the first embodiment. In contrast, a bending load is applied by the movement mechanism 33, unlike in the first embodiment, by moving the load-side intersection portion M121 of the load-applying jig M12 as described below, and then moving it in a bending direction D36 along the friction direction D13. To apply such a bending load, the movement mechanism 33 includes a deformation movement mechanism 331 that deforms the load-applying jig M12 to move the load-side intersection portion M121.

[0051] Fig. 9 is a schematic diagram showing the movement of the load-side intersection portion due to the deformation of the load-applying jig shown in Fig. 8, and Fig. 10 is a schematic diagram showing the operation of the deformation movement mechanism for performing the deformation and movement shown in Fig. 9. Note that in Fig. 9 as well, the test material M11 is shown emphasized and bolder than the load-applying jig M12.

[0052] The movement of the load-side intersection portion M121 refers to the movement of the load-side intersection portion M121 extending in an intersecting extension direction D31 that intersects both the target length direction D11 of the test material M11 held by the target holder 11 and the friction direction D13 of the load-applying jig M12. In this embodiment, the movement of the load-side intersection portion M121 due to the deformation of the load-applying jig M12 rotates the load-side intersection portion M121 in a rotation direction D32 of 90° relative to its pre-deformation position, thereby assuming an upright position. The deformation / movement mechanism 331 for such deformation and movement includes a pair of fulcrum mechanisms 331a that move both ends of the load-side intersection portion M121 in the rotation direction D32 ( FIG. 9 ), each of which includes a press-down fulcrum 331a-1 and a push-in fulcrum 331a-2.

[0053] The pressing fulcrum 331a-1 is a round bar-shaped fulcrum component that supports a pressing portion M123 adjacent to the end of the jig to a portion M122 pressed by the pressing fulcrum 331a-2 so that the load application jig M12 does not move when pressed by the pressing fulcrum 331a-2. The support at this time is achieved by moving in a pressing direction D34 opposite to the pressing direction D33 by the pressing fulcrum 331a-2 and pressing the pressing portion M123.

[0054] Two push-in fulcrums 331a-2 are arranged side by side in the friction direction D13 for each push-in fulcrum 331a-2, and are round-bar-shaped pulley parts that push and support the push-in portion M122 in the push-in direction D33 at intervals corresponding to the arrangement intervals between them. The two push-in fulcrums 331a-2 are supported at the front end of a rectangular push-in block 331a-3 in the push-in direction D33, as shown in Figure 10. The two push-in fulcrums 331a-2 move together with the push-in block 331a-3 in the push-in direction D33, thereby pushing the push-in portion M122 in the push-in direction D33.

[0055] In each of the pair of fulcrum mechanisms 331a, the pressing of the pressing portion M123 by the pressing fulcrum 331a-1 and the pressing of the pressing portion M122 by the two pressing fulcrums 331a-2 are performed as described above, deforming the load application jig M12 into a generally S-shape. The center of the S-shape then rises along the pressing direction D33, causing the load-side intersection portion M121 to extend in the intersecting extension direction D31. At this time, the load application jig M12 is displaced along the intersecting extension direction D31 at the jig end sides of the load-side intersection portion M121 and the two pressing portions M122, resulting in a reduction in the distance between the ends of the load application jig M12. This reduction is achieved by the movement mechanism 33 moving the ends of the load application jig M12 closer to each other in the approaching direction D35 along the friction direction D13 in synchronization with the movement of the pair of fulcrum mechanisms 331a.

[0056] In the movement mechanism 33, a bending load is applied after the load side intersection portion M121 is moved by the deformation movement mechanism 331, but in this embodiment, this bending load is applied by the following common movement mechanism 332.

[0057] Fig. 11 is a schematic perspective view similar to Fig. 8 showing how a bending load is applied by the common moving mechanism in the material testing apparatus shown in Fig. 8. Fig. 12 is a schematic view showing the application of the bending load shown in Fig. 11 as viewed from the direction of arrow V31 in Fig. 11.

[0058] The common moving mechanism 332 included in the moving mechanism 33 of the materials testing apparatus 3 of this embodiment is a mechanical part that is responsible for both applying a friction load and applying a bending load. That is, the common moving mechanism 332 reciprocates the jig holding part 12 in the friction direction D13 when applying a friction load, and moves the jig holding part 12 after the load-side intersection part M121 has moved in the bending direction D36 along the friction direction D13 when applying a bending load. This common moving mechanism 332 is a mechanical part equivalent to the friction moving mechanism 131 in the first embodiment described above, and includes a pair of jig end moving mechanisms 332a that are connected one-to-one to a pair of jig end holding parts 121 of the jig holding part 12.

[0059] When applying a frictional load, before the above-mentioned deformation movement, when the load-applying jig M12 is in a linear shape, the pair of jig end moving mechanisms 332a synchronize with each other to move each jig end holder 121 back and forth in the friction direction D13. Due to this synchronized movement, the load-applying jig M12 moves back and forth while maintaining the tension from the jig holder 12, and rubs against the friction load-receiving point P31 (FIG. 12) of the test material M11 held by the object holder 11, applying a frictional load.

[0060] When applying a bending load after the deformation movement, the load-side intersection portion M121, which extends in the cross-extension direction D31, is moved in the bending direction D36, pressing against the material under test M11. The movement of the load-side intersection portion M121 at this time is achieved by moving the load-applying jig M12 together with the deformation movement mechanism 331 in the bending direction D36. This movement is achieved by the pair of jig end movement mechanisms 332a synchronously moving each jig end holder 121 in the bending direction D36 along the friction direction D13, as in the case of applying a friction load. A constant tension is applied to the load-side intersection portion M121 by pulling it in the cross-extension direction D31 by the pair of fulcrum mechanisms 331a during deformation of the load-applying jig M12. When applying a bending load, the load-applying jig M12 presses against the material under test M11 while maintaining this tension, thereby applying a bending load to the bending load-receiving point P32 ( FIG. 12 ). This bending load point P32 is located approximately 90° away from the friction load point P31 in the circumferential direction around the central axis of the material under test M11. When returning the bent material under test M11 to its original state, the pair of jig end moving mechanisms 332a synchronize with each other to move each jig end holder 121 in the direction opposite to the bending direction D36 to release the bending load. Furthermore, when bending and straightening the material under test M11 by repeatedly applying and releasing such bending loads, movement in the bending direction D36 and movement in the opposite direction are alternately repeated.

[0061] It goes without saying that, similar to the first embodiment, the material testing device 3 of the third embodiment described above can also perform friction tests and bending tests while minimizing changes in test conditions that may occur due to device replacement, etc.

[0062] In this embodiment, as in the first embodiment, by moving the jig holder 12, friction tests and bending tests can be performed at any friction load point P31 and bending load point P32 in the target length direction D11 of the material under test M11. Furthermore, as in the first embodiment, for friction tests, the movement mechanism 33 rotates the jig holder 12 (i.e., the load-applying jig M12) around the central axis of the material under test M11 held by the target holder 11, thereby performing a friction test at any friction load point P31 in the circumferential direction. On the other hand, for bending tests, the angle of the load-side intersection M121 can be changed by adjusting the mutual spacing between the pair of fulcrum mechanisms 331a, for example, to shift the bending load point P32 in the circumferential direction. In other words, bending tests can also be performed at any bending load point P32 in the circumferential direction of the material under test M11.

[0063] In this embodiment, the moving mechanism 33 applies a frictional load by reciprocating in the friction direction D13 along the jig length direction D12. Furthermore, when applying a bending load, the moving mechanism 33 moves the load-side intersection portion M121 so that it extends in an intersecting extension direction D31 that intersects both the target length direction D11 and the friction direction D13. After the movement, the moving mechanism 33 then moves the load-side intersection portion M121 in a bending direction D36 along the friction direction D13, thereby applying a bending load. With this configuration, because both the friction direction D13 and the bending direction D36 are aligned with the jig length direction D12, the moving mechanism 33 can be simplified, allowing for a more compact device.

[0064] In this embodiment, the movement mechanism 33 includes a deformation movement mechanism 331 that deforms the load application jig M12 to move the load-side intersection portion M121, and a common movement mechanism 332. The common movement mechanism 332 is a mechanical component that moves the jig holding part 12 back and forth in the friction direction D13 when a friction load is applied, and moves the jig holding part 12 in the bending direction D36 after moving the load-side intersection portion M121 when a bending load is applied. With this configuration, the common movement mechanism 332 performs the back and forth movement in the friction direction D13 and the movement in the bending direction D36, thereby simplifying the mechanism and reducing manufacturing costs.

[0065] The first to third embodiments described above merely show typical forms of the present invention, and the present invention is not limited to these. That is, various modifications can be made without departing from the gist of the present invention. As long as such modifications still have the configuration of the materials testing device of the present invention, they are of course included in the scope of the present invention.

[0066] For example, in the first to third embodiments described above, the following material testing apparatus 1 is exemplified as an example of a material testing apparatus. That is, the material testing apparatus 1 is exemplified as applying a friction load and a bending load to a long test material M11 such as a metal wire or thread with a circular cross section using a long load-applying jig M12 such as a similar metal wire or thread. However, the material testing apparatus is not limited to this, and the specific cross-sectional shape, material, etc. of the test material and the load-applying jig can be appropriately set as long as they are both long and can apply a friction load or a bending load.

[0067] Furthermore, in the first to third embodiments described above, the test material M11 and the load application jig M12 are shown as examples of the test material and the load application jig, respectively, without specifying their thicknesses. In the drawings, the test material M11 and the load application jig M12 are drawn with approximately the same thickness, or the test material M11 is drawn with a thicker thickness to emphasize it. However, the specific thicknesses of the test material and the load application jig are not limited to any one larger or smaller relationship, and any relationship can be adopted as long as it is possible to apply a friction load or a bending load.

[0068] In the first and second embodiments described above, the moving mechanisms 13 and 23 are exemplified as examples of the moving mechanism, which reciprocate the jig holder 12 in the friction direction D13 to apply a frictional load. These moving mechanisms 13 and 23 also apply a bending load by moving at least the load-side intersection portion M121 of the load-applying jig M12 in bending directions D14 and D24 that intersect both the target length direction D11 and the friction direction D13. However, the moving mechanism is not limited to these. For example, as illustrated in the third embodiment, the moving mechanism may move the load-side intersection portion M121 in a bending direction D36 along the friction direction D13 when applying a bending load. The specific moving direction of the moving mechanism may be set as appropriate, as long as it applies a frictional load and a bending load from the load-applying jig to the test material by moving at least one of the target holder and the jig holder. However, as mentioned above, by changing the direction of movement by the moving mechanisms 13, 23 when applying a frictional load and when applying a bending load, and applying each load to the same loaded point P11, changes in the test conditions can be further suppressed.

[0069] Furthermore, in the second embodiment described above, as an example of the moving mechanism, the moving mechanism 23 is exemplified, which includes the friction moving mechanism 131 and the bending partial moving mechanism 232 that partially moves only the load side intersection portion M121. However, the moving mechanism is not limited to this, and may be, for example, a mechanism that moves the load application jig M12 in the bending direction D14 over its entire length, as exemplified in the first embodiment. However, as described above, by adopting a configuration that partially moves only the load side intersection portion M121, the material testing apparatus 1 can be made smaller.

[0070] Furthermore, in the first embodiment described above, as an example of the moving mechanism, the moving mechanism 13 includes the friction moving mechanism 131 and the bending entire moving mechanism 132 that moves the entire load application jig M12. However, the moving mechanism is not limited to this, and may be one that moves only the load-side intersection portion M121, for example, as exemplified in the second embodiment. However, as described above, by moving the entire load application jig M12, the manufacturing cost can be reduced by simplifying the mechanism.

[0071] In the third embodiment described above, the moving mechanism 13 is exemplified as an example of a moving mechanism. The moving mechanism 13 moves the load-side intersection portion M121 so as to extend in the intersecting extension direction D31 when a bending load is applied, and then moves the load-side intersection portion M121 in the bending direction D36 along the friction direction D13. However, the moving mechanism is not limited to this. For example, as exemplified in the first and second embodiments, the moving mechanism may move at least the load-side intersection portion M121 in bending directions D14 and D24 that intersect with the friction direction D13 when a bending load is applied. However, as described above, by making the friction direction D13 and the bending direction D36 the same direction along the jig length direction D12 of the load-applying jig M12, the moving mechanism 33 can be simplified and the material testing apparatus 1 can be made more compact.

[0072] In the third embodiment described above, the movement mechanism 33 including the deformation movement mechanism 331 and the common movement mechanism 332 is exemplified as an example of a movement mechanism in which the friction direction and the bending direction are the same. The deformation movement mechanism 331 is a mechanism that deforms the load application jig M12 to move the load-side intersection portion M121, and the common movement mechanism 332 is a mechanism that commonly performs the reciprocating movement of the jig holding portion 12 when applying a frictional load and the movement of the jig holding portion 12 when applying a bending load. However, the movement mechanism in which the friction direction and the bending direction are the same is not limited to this. For example, the movement mechanism may be a mechanism that does not deform the load application jig M12, but rotates and moves the load application jig M12 over its entire length to extend the load-side intersection portion M121 in the intersecting extension direction D31. In this case, the mechanism for reciprocating the jig holding portion 12 when applying a friction load and the mechanism for moving the load applying jig M12 after the rotational movement in the bending direction together with the jig holding portions 12 at both ends are separate mechanisms, not a common mechanism. However, as mentioned above, the movement mechanism 33 including the above-mentioned deformation movement mechanism 331 and common movement mechanism 332 can reduce manufacturing costs by simplifying the mechanism. [Explanation of symbols]

[0073] 1,1-1,2,3 Material testing equipment 11 Target holding section 12 Jig holding part 13,23,33 Moving mechanism 111 Test end holding part 121 Jig end holding part 131,131-1 Friction movement mechanism 131a Friction jig end movement mechanism 131a-1 Friction test end movement mechanism 132 Overall movement mechanism for bending 132a Bending jig end movement mechanism 232 Bending part movement mechanism 232a,331a Fulcrum mechanism 232a-1, 331a-1 Presser foot support 232a-2,331a-2 Push-in fulcrum 331 Transformation and Movement Mechanism 331a-3 Pushing block 332 Common movement mechanism 332a Jig end movement mechanism D11 Target length direction D12 Jig length direction D13, D13-1 Friction direction D14, D24 bending direction D31 Cross extension direction D32 Rotation direction D33 Push direction D34 Presser direction D36 Bending direction D25, D35 approach direction M11 Test material M12 load application jig M121 Load side cross section P11 Loaded point P31 Loaded point for friction P32 Loaded point for bending

Claims

1. an object holder that holds a long test material as a test object; a jig holding section that holds a load-applying jig having an elongated shape and that applies a friction load that rubs the test material and a bending load that bends the test material in an orientation that intersects with the test material; a movement mechanism that applies the friction load and the bending load from the load application jig to the test material by moving at least one of the object holder and the jig holder; A material testing device comprising:

2. The moving mechanism is The jig holding portion is reciprocated in a friction direction along the length direction of the load application jig, thereby applying the friction load to a loaded point on the test material that intersects with the load application jig, and 2. A material testing apparatus as described in claim 1, characterized in that the bending load is applied to the loaded point on the test material by moving the load-applying jig held by the jig holding portion in a bending direction that intersects both the longitudinal direction of the test material and the friction direction, at least for the load-side intersection portion that intersects with the test material.

3. The moving mechanism is a friction movement mechanism that reciprocates the jig holding portion in the friction direction; a bending entire moving mechanism that moves the jig holding portion together with the friction moving mechanism in the bending direction to move the entire load applying jig; 3. The material testing device according to claim 2, further comprising:

4. The moving mechanism is a friction movement mechanism that reciprocates the jig holding portion in the friction direction; a bending portion moving mechanism that partially moves only the load side intersection portion of the load application jig in the bending direction; 3. The material testing device according to claim 2, further comprising:

5. The moving mechanism is The jig holding portion is reciprocated in a friction direction along the length direction of the load application jig, thereby applying the friction load to a friction load-receiving point on the test material that intersects with the load application jig, and 2. The material testing device according to claim 1, wherein at least the load-side intersection portion of the load-applying jig held by the jig holding portion that intersects with the test material is moved so that the load-side intersection portion extends in an intersecting extension direction that intersects both the longitudinal direction of the test material and the friction direction, and then the jig is moved in a bending direction along the friction direction, thereby applying the bending load to the bending load-bearing point of the test material.

6. The moving mechanism is a deformation / movement mechanism that deforms the load application jig to move the load side intersection portion so that the load side intersection portion extends in the intersecting extension direction; a common moving mechanism that reciprocates the jig holding portion in the friction direction when the friction load is applied, and moves the jig holding portion in the bending direction after the load-side intersection portion has moved when the bending load is applied; 6. The material testing device according to claim 5, further comprising:

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