Material testing machine

Abstract

To provide a material testing machine capable of facilitating discrimination of an operation switch and preventing the occurrence of malfunction of a gripper when a plurality of grippers are provided.SOLUTION: The material testing machine includes a plurality of gripping tools provided on a crosshead that is provided on the testing machine main body so as to be capable of moving up and down, and another gripping tool provided on the testing machine main body and paired with the plurality of gripping tools, and in at least one of the plurality of gripping tools or the plurality of other gripping tools, an operation switch for performing a gripping operation of the gripping tool is provided at a position corresponding to the gripping tool.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a materials testing machine. [Background technology]

[0002] Conventionally, there have been disclosed materials testing machines that have a mechanism for opening and closing the gripping teeth of a gripping tool by switching between air and hydraulic pressure controls using an operating switch attached to a pillar cover, gripping a test piece by opening and closing the gripping teeth, and performing a tensile test by moving the crosshead (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-101368 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, a material testing machine such as that described in Patent Document 1 is provided with an operation switch for opening and closing the gripping teeth of the gripping tool. In this case, a multi-barrel material testing machine equipped with a plurality of grippers is known in order to test a plurality of test pieces in a single operation. In this case, operation switches for operating the multiple grippers are provided on the column cover of the materials testing machine, and the gripping teeth of the gripper are operated by operating the operation switch corresponding to the gripper.

[0005] However, with such materials testing machines, it is necessary to identify the operating switch corresponding to the gripping tool, and there is a problem in that if the wrong operating switch is pressed, a malfunction may occur in which a gripping tool other than the one that should be operated is activated. The present invention provides a materials testing machine that, when multiple grippers are provided, makes it easy to distinguish between operation switches and prevents malfunction of the grippers. [Means for solving the problem]

[0006] A first aspect of the present invention relates to a materials testing machine that uses multiple gripping devices to simultaneously test multiple test pieces, and that includes a crosshead that is mounted on the testing machine body and can be raised and lowered, multiple gripping devices mounted on the crosshead, and other gripping devices that are mounted on the testing machine body and are paired with the multiple gripping devices, and at least one of the multiple gripping devices or the multiple other gripping devices is provided with an operation switch at a corresponding position on each of the multiple gripping devices for performing the gripping operation of the gripping device. [Effects of the Invention]

[0007] According to the present invention, by providing an operation switch at a corresponding position on at least one of the gripper and the other gripper, it is possible to easily distinguish the operation switch corresponding to the gripper or the other gripper, thereby providing a materials testing machine that can prevent malfunction of the gripper due to pressing the wrong operation switch. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing a material testing machine according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing an operation switch according to the first embodiment. [Figure 3] FIG. 10 is a front view showing a material testing machine according to a second embodiment. [Figure 4] FIG. 11 is a front view showing a material testing machine according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] 1. First Embodiment FIG. 1 is a front view of a material testing machine according to a first embodiment of the present invention. The material testing machine 1 of this embodiment is a tensile testing machine in which the upper end of a test piece (not shown) is fixed and the lower end of the test piece is pulled downward. The material testing machine 1 of this embodiment includes a testing machine main body 10, which is a tensile testing machine, and a terminal device 5 that controls the tensile test operation by the testing machine main body 10 and records the measurement results of the test. The terminal device 5 includes a display unit 6 and an operation unit 7.

[0011] The testing machine main body 10 includes a base 11. On both sides of the base 11, columnar support members 12 are provided, extending upward. A yoke 13 is provided at the upper end of each support member 12 to connect the upper ends of the support members 12 together. A crosshead 14 is provided between the base 11 and the yoke 13. The crosshead 14 is supported by a drive mechanism (not shown) provided inside the support member 12 and on the base 11, and is configured to be movable in the vertical direction by driving the drive mechanism. Here, the driving mechanism may be a driving mechanism using a rotationally driven screw rod, or an actuator using a hydraulic cylinder.

[0012] A plurality of (three in this embodiment) upper gripping tools 20 are arranged side by side on the yoke 13. A pair of upper gripping teeth 21 that can be opened and closed is provided on the lower part of the upper gripping tool 20. In the crosshead 14, a plurality of (three in this embodiment) lower gripping tools 22 are arranged side by side at positions corresponding to the upper gripping tools 20 in the vertical direction. A pair of lower gripping teeth 23 that can be opened and closed is provided on the upper part of the lower gripping tool 22.

[0013] The upper gripping tool 20 and the lower gripping tool 22 are hydraulic gripping tools that use hydraulic oil to open and close the upper gripping teeth 21 and the lower gripping teeth 23, or pneumatic gripping tools that use air pressure.

[0014] The crosshead 14 is provided with operation switches 30 at positions corresponding to the lower gripping tools 22, respectively. FIG. 2 is a front view showing the operation switch according to the first embodiment. 2, the operation switch 30 includes an upper operation switch 31 and a lower operation switch 32. The upper operation switch 31 and the lower operation switch 32 are arranged at a predetermined interval in the vertical direction.

[0015] The upper operation switch 31 is a switch for opening and closing the upper gripping teeth 21 of the upper gripping tool 20, and is configured as, for example, a toggle switch. The upper operation switch 31 is configured to be switched by moving it left and right. In this embodiment, the upper gripping jaws 21 are operated to open when the upper operation switch 31 is switched to the left side in FIG. 2, and are operated to close when the upper operation switch 31 is switched to the right side in FIG. 2.

[0016] In this embodiment, the operation switch 30 is provided on the crosshead 14, but it may be provided on the yoke 13.

[0017] Next, the operation of the material testing machine 1 of this embodiment will be described. When a test is performed using the material testing machine 1, for example, an operator places a test piece between the upper grip 20 and the lower grip 22. In this state, the operator operates the upper operating switch 31 of the operating switch 30, which is located at a position corresponding to the lower gripping tool 22 on which the test piece is placed, to close the upper gripping teeth 21, thereby gripping the upper end of the test piece with the upper gripping tool 20. Next, the operator similarly operates the lower operating switch 32 of the operating switch 30 located in the corresponding position to close the lower gripping teeth 23, thereby gripping the lower end of the test piece with the lower gripping tool 22.

[0018] Thereafter, the operator operates the operation unit 7 of the terminal device 5 to operate the material testing machine 1 and perform a test on the test piece.

[0019] As described above, the materials testing machine 1 of this embodiment includes a crosshead 14 that is mounted on the testing machine body 10 so as to be movable up and down, a plurality of upper grips 20 (grips) mounted on the crosshead 14, and lower grips 22 (other grips) that are mounted on the testing machine body 10 and pair with the plurality of upper grips 20, and an operation switch 30 is provided at a corresponding position on at least one of the plurality of upper grips 20 or the plurality of lower grips 22 for performing the gripping operation of the upper grip 20 or the lower grip 22. Furthermore, each operation switch 30 is provided on the crosshead 14. By providing the operation switches 30 at positions corresponding to the multiple grippers on the crosshead 14, it is possible to easily distinguish between the operation switches 30 corresponding to the upper gripper 20 and the lower gripper 22. This makes it possible to prevent malfunction of the grippers due to the wrong operation switch 30 being pressed.

[0020] 2. Second Embodiment Next, a second embodiment of the present invention will be described. FIG. 3 is a front view showing a material testing machine according to the second embodiment of the present invention. The material testing machine 1 of this embodiment is a tensile testing machine in which the lower end of a test piece is fixed and the upper end of the test piece is pulled upward. 3, the material testing machine 1 of the second embodiment includes a testing machine main body 102, which is a tensile testing machine. Note that a terminal device connected to the material testing machine 1 is not shown in the drawing.

[0021] The testing machine main body 10 includes a table 15. On both sides of the table 15, columnar support members 12 are provided, extending upward. A yoke 13 is provided at the upper end of each support member 12 to connect the upper ends of the support members 12 together.

[0022] A crosshead 14 is provided between the table 15 and the yoke 13. The crosshead 14 is supported by a drive mechanism provided on the support member 12, and is configured to be movable in the vertical direction by driving the drive mechanism. Here, the driving mechanism may be a driving mechanism using a rotationally driven screw rod, or an actuator using a hydraulic cylinder.

[0023] A plurality of (five in this embodiment) upper gripping tools 20 are arranged side by side on the crosshead 14. A pair of upper gripping teeth 21 that can be opened and closed is provided on the lower part of the upper gripping tool 20. A plurality of (three in this embodiment) lower gripping tools 22 are arranged side by side on table 15 at positions corresponding to the upper gripping tools 20 in the vertical direction. A pair of lower gripping teeth 23 that can be opened and closed is provided on the upper part of lower gripping tool 22. The configurations of the upper gripping tool 20 and the lower gripping tool 22 are the same as those in the first embodiment.

[0024] The table 15 is provided with operation switches 30 at positions corresponding to the lower gripping tools 22, respectively. 3, the operation switch 30 includes an upper operation switch 31 and a lower operation switch 32. The detailed configurations of the upper operation switch 31 and the lower operation switch 32 are the same as those in the first embodiment. The operation switch 30 may be provided on the crosshead 14.

[0025] Next, the operation of the material testing machine 1 according to the second embodiment will be described. When a test is performed using the material testing machine 1, for example, an operator places a test piece between the upper grip 20 and the lower grip 22. In this state, the operator operates the upper operating switch 31 of the operating switch 30, which is located at a position corresponding to the lower gripping tool 22 on which the test piece is placed, to close the upper gripping teeth 21, thereby gripping the upper end of the test piece with the upper gripping tool 20. Next, the operator similarly operates the lower operating switch 32 of the operating switch 30 located in the corresponding position to close the lower gripping teeth 23, thereby gripping the lower end of the test piece with the lower gripping tool 22. Thereafter, the operator operates the material testing machine 1 to test the test piece.

[0026] As described above, in the material testing machine 1 of this embodiment, each operation switch 30 is provided on the table 15 provided below the testing machine main body 10. By providing the operation switches 30 at positions corresponding to the multiple grippers on the table 15, it is possible to easily distinguish between the operation switches 30 corresponding to the upper gripper 20 and the lower gripper 22. This makes it possible to prevent malfunction of the grippers due to the wrong operation switch 30 being pressed.

[0027] 3. Third Embodiment Next, a third embodiment of the present invention will be described. FIG. 4 is a front view showing a material testing machine according to the third embodiment of the present invention. Similar to the second embodiment, the material testing machine 1 of this embodiment is a tensile testing machine in which the lower end of a test piece is fixed and the upper end of the test piece is pulled upward. As shown in FIG. 4, the material testing machine 1 of the third embodiment is a tensile testing machine equipped with a table 15, similar to the second embodiment.

[0028] 4, the operation switch 30 is composed of an upper operation switch 31 that operates the gripping teeth of the upper gripping tool 20, and a lower operation switch 32 that operates the gripping teeth of the lower gripping tool 22. In this embodiment, the operation switch 30 is not an integrated type, but is composed of two separate switches. The upper operation switches 31 are provided at positions corresponding to the upper gripping tools 20 of the crosshead 14, and the lower operation switches 32 are also received at positions corresponding to the lower gripping tools 22 of the table 15. The other configurations are the same as those in the second embodiment, so the same parts are given the same reference numerals and the description thereof will be omitted.

[0029] Next, the operation of the material testing machine 1 according to the third embodiment will be described. When a test is performed using the material testing machine 1, for example, an operator places a test piece between the upper grip 20 and the lower grip 22. In this state, the operator operates the upper operating switch 31 located at a position corresponding to the upper gripping tool 20 on the crosshead 14 to close the upper gripping teeth 21, thereby gripping the upper end of the test piece with the upper gripping tool 20. Next, the operator similarly operates the lower operation switch 32 on the table 15 to close the lower gripping teeth 23, thereby causing the lower gripping tool 22 to grip the lower end of the test piece. Thereafter, the operator operates the material testing machine 1 to test the test piece.

[0030] As described above, the material testing machine 1 of this embodiment has an operation switch 30 that is composed of an upper operation switch 31 (operation switch) that grips the upper grip 20 (gripper) and is located near the upper grip 20, and a lower operation switch 32 (operation switch) that grips the lower grip 22 (other gripper) and is located near the lower grip 22. Thus, by providing upper operation switches 31 at positions corresponding to the plurality of upper gripping tools 20 and lower operation switches 32 at positions corresponding to the plurality of lower gripping tools 22, it is possible to easily distinguish between the operation switches 30 corresponding to the upper gripping tool 20 and the lower gripping tool 22. This makes it possible to prevent malfunction of the gripping tools due to the wrong operation switch 30 being used.

[0031] [4. Modifications] The above-described embodiment is an example of one aspect of the present invention, and any modifications and applications are possible without departing from the spirit of the present invention.

[0032] In the above-described embodiment, the material testing machine 1 is a testing machine that applies a tensile load, but is not limited to this and may be a testing machine that applies other test forces, such as a compressive load.

[0033] In the above embodiment, a vertical material testing machine 1 has been described, but it is also possible to apply it to a horizontal material testing machine that pulls a test piece in the horizontal direction.

[0034] [5. Aspects] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0035] (Item 1) A materials testing machine according to one embodiment is a materials testing machine that uses multiple gripping devices to simultaneously test multiple test pieces, and is equipped with a crosshead that is mounted on the testing machine body so as to be able to move up and down, and is equipped with multiple gripping devices mounted on the crosshead and other gripping devices that are mounted on the testing machine body and are pairs with the multiple gripping devices, and an operation switch for performing the gripping operation of the gripping device may be provided at a corresponding position on at least one of the multiple gripping devices or the multiple other gripping devices.

[0036] According to the materials testing machine described in paragraph 1, by providing an operation switch at a corresponding position on at least one of the gripper and the other gripper, it is possible to easily distinguish the operation switch corresponding to the gripper or the other gripper, thereby preventing malfunction of the gripper due to switching on the wrong operation switch.

[0037] (Item 2) In the material testing machine described in item 1, each of the operation switches may be provided on the crosshead.

[0038] According to the materials testing machine described in paragraph 2, by providing operation switches at positions on the crosshead corresponding to the multiple grippers or other grippers, it is possible to easily distinguish between the operation switches corresponding to one gripper and the other gripper, thereby preventing malfunction of the gripper due to pressing the wrong operation switch.

[0039] (Item 3) In the material testing machine described in item 1, each of the operation switches may be provided on a yoke provided on the upper part of the testing machine body.

[0040] According to the materials testing machine described in paragraph 3, by providing operation switches at positions on the yoke corresponding to the multiple grippers or other grippers, it is possible to easily distinguish between the operation switches corresponding to the grippers or other grippers, thereby preventing malfunction of the grippers due to pressing the wrong operation switch.

[0041] (Item 4) In the material testing machine described in item 1, the operation switches may be provided on a table provided below the main body of the testing machine.

[0042] According to the materials testing machine described in paragraph 4, by providing operation switches at positions on the table corresponding to multiple grippers or other grippers, it is possible to easily distinguish between the operation switches corresponding to one gripper and the other gripper, thereby preventing malfunction of the gripper due to pressing the wrong operation switch.

[0043] (Item 5) In the material testing machine described in item 1, the operation switch may be composed of an operation switch that grips the gripping tool and is located near the gripping tool, and another operation switch that grips the other gripping tool and is located near the other gripping tool.

[0044] According to the materials testing machine described in paragraph 5, by providing an operation switch provided near one gripping tool and another operation switch provided near another gripping tool, it is possible to easily distinguish between the operation switch corresponding to one gripping tool and the other gripping tool, thereby preventing malfunction of the gripping tool due to the wrong operation switch. [Explanation of symbols]

[0045] 1. Material testing machine 5 Terminal Devices 6 Display section 7 Control section 10 Testing machine body 11 Foundation 12 Support member 13 York 14 Crosshead 15 tables 20 Upper gripping tool 21 Upper gripping teeth 22 Lower gripping tool 23 Lower gripping teeth 30 Operation switch 31 Upper operation switch 32 Lower operation switch

Claims

1. In a materials testing machine that uses multiple grips to simultaneously test multiple test pieces, A crosshead is provided on the testing machine body so as to be movable up and down, a plurality of the gripping tools provided on the crosshead, and other gripping tools provided on the testing machine body and paired with the plurality of the gripping tools; In at least one of the plurality of gripping tools or the plurality of other gripping tools, an operation switch for performing a gripping operation of the gripping tool is provided at a corresponding position of each of the gripping tools. Material testing machine.

2. Each of the operation switches is provided on the crosshead.

2. The material testing machine according to claim 1.

3. Each of the operation switches is provided on a yoke provided on the upper part of the testing machine body.

2. The material testing machine according to claim 1.

4. Each of the operation switches is provided on a table provided at the bottom of the testing machine body.

2. The material testing machine according to claim 1.

5. The operation switch is composed of an operation switch that grips the gripping tool and is provided in the vicinity of the gripping tool, and another operation switch that grips the other gripping tool and is provided in the vicinity of the other gripping tool.

2. The material testing machine according to claim 1.

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