JP5919965B2 - Material testing machine - Google Patents

Description

  The present invention relates to a material testing machine equipped with a test strip collecting apparatus that collects and discards test strips after completion of a test.

  In material testing for quality evaluation of steel materials, synthetic resin materials, etc., it is automatically performed by machine operation from supplying test pieces to the test position to collecting them after the test is completed. Therefore, a material testing machine capable of continuously testing a plurality of test pieces is known (see Patent Document 1). In the material testing machine described in Patent Document 1, the tensile test for applying a tensile load to the test piece in a state of being gripped by the upper gripping tool and the lower gripping tool is completed, and the recovery chuck has a broken chuck at the tip. The specimen is collected from the gripper by a test piece collecting apparatus including a collecting arm arranged and a rotating cylinder for rotating the collecting arm. When the recovery chuck that holds the test piece is moved above the recovery box by turning the recovery arm, the gripping force of the recovery chuck is released, so that the test piece is dropped vertically into the recovery box and discarded. doing.

JP 2000-39386 A

  However, in the test piece recovery apparatus described in Patent Document 1, there is a limitation on the turning angle of the recovery arm, and the bottom of the recovery box is determined based on the positional relationship between the recovery chuck that holds the test piece after the test and the recovery box. The breaking position of the fracture test piece at is always the same position. For this reason, even if the volume of the collection box itself is large enough to collect the test piece after the test, the test piece dropped in the collection box will not spread evenly over the entire bottom surface of the collection box. It will be piled up as one mountain. Thus, if the test pieces after the test are stacked beyond the height of the collection box, the operation of the collection arm is hindered. If it does so, it will become impossible to collect | recover the test pieces after a test, and operation | movement of the whole apparatus will be stopped before the material test to the preset number of test pieces is completed.

  The present invention has been made to solve the above problems, and when performing a material test on a large number of test pieces, the test piece can be reliably recovered until the material test for the set number of test pieces is completed. An object is to provide a material testing machine that can be used.

The invention according to claim 1 is a test strip supply device that supplies a test strip to a test position, a load mechanism that applies a load to a test strip that is gripped at both ends by an upper grip and a lower grip, and a post-test In a material testing machine including a test strip recovery apparatus for recovering a test strip, the test strip recovery apparatus includes a first gripping unit that grips a test specimen after a test gripped by the lower gripping tool, and the first gripping unit. A first arm that supports one gripping portion, a collection position at which the first gripping portion grips the test piece by turning the first arm and collects the test piece from the lower gripping tool, and the first gripping And a first moving mechanism for moving the first gripping portion between a disposal position for releasing the gripping force on the test strip by the unit and discarding the test strip, and the first recovery A test arranged above the means and held by the upper grip A second gripping part for gripping the test piece, a second arm for supporting the second gripping part, and turning and linearly moving the second arm to cause the second gripping part to grip the test piece and The collection position for collecting the test piece from the upper gripping tool and the disposal position of the test piece in the first collecting means for releasing the gripping force on the test piece by the second gripping portion and discarding the test piece are in the horizontal direction. And a second collection mechanism having a second moving mechanism for moving the second gripping portion between different disposal positions.

  The invention according to claim 2 is the invention according to claim 1, wherein the first moving mechanism is a first rotating motor that pivotally supports the first arm by a rotating shaft, and the second moving mechanism is: A second rotary motor that pivotally supports the second arm with a rotary shaft, and a slide mechanism connected to the second rotary motor.

  According to a third aspect of the present invention, in the second aspect of the invention, the second moving mechanism drives the second gripping portion and a second rotary motor that pivotally supports the second arm to test specimens. The first gripping portion disposed above the disposal position for discarding the first gripping portion, and then moving the first gripping portion by driving a slide mechanism coupled to the second rotary motor. The test piece is moved to a different disposal position in the horizontal direction from the vertically upper position of the disposal position of the test piece.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the second recovery means includes a wiping member that wipes the upper surface of the first arm or the first gripping portion.

  According to the first aspect of the present invention, the second collection means has a test piece discard position in the second collection means for collecting the test piece after the test from the upper gripping tool. Since it has a second moving mechanism that moves the second gripping part so that it is different in the vertical direction from the position, the collected test pieces are collected in one pile in the collection box. When performing a material test on a large number of test pieces, the test piece can be reliably recovered until the material test for the set number of test pieces is completed.

  According to the second and third aspects of the invention, since the second moving mechanism is configured by the second rotary motor and the slide mechanism, the second gripping portion is the first while the configuration is simple. It is possible to move the test piece to a different disposal position from a position vertically above the disposal position of the test piece.

  According to the invention described in claim 4, since the second recovery means includes the wiping member for wiping the upper surface of the first arm or the first grip portion, the second recovery means should be recovered from the upper gripping tool. Even if the test piece is caught by the first arm or the first gripping portion of the first recovery means, it can be removed by wiping with the wiping member.

1 is a schematic front view of a material testing machine according to the present invention. FIG. 3 is a schematic diagram showing a main part of a test piece collecting apparatus 50. 4 is a schematic side view showing a main part of a test strip collecting apparatus 50. FIG. It is explanatory drawing which shows typically a mode that the test piece TP is collect | recovered from the upper holding tool 14 by the 2nd collection | recovery part 61. FIG. It is a side surface schematic diagram which shows the discard operation | movement of the test piece TP by the 1st collection | recovery part 51 and the 2nd collection | recovery part 61. FIG. It is a side surface schematic diagram which shows the discard operation | movement of the test piece TP by the 1st collection part 51 and the 2nd collection part 61 concerning other embodiments.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of a material testing machine according to the present invention.

  This material testing machine includes a testing machine main body 1, a test strip supply device 2, and a test strip recovery device 50. A plurality of test strips TP such as plastic accommodated in the test strip supply device 2 are tested one by one. Until the test piece placed in the main body 1 and discarded in the collection box 21 is automatically performed by a machine operation.

  A pair of frames 12 are erected on the base 18 of the testing machine main body 1, and a pair of screw rods that are rotated in synchronization by a drive mechanism (not shown) are disposed in the frame 12. A nut provided in the cross head 11 is screwed onto the screw rod, and the cross head 11 moves up and down by the rotation of the screw rod. The raising / lowering operation of the cross head 11 is controlled by a control circuit 17 connected to the testing machine main body 1.

  In this testing machine main body 1, an upper grip 14 is connected to a crosshead 11 via a load cell 16 that detects a test force, and a lower grip 15 is disposed on a base 18. The tensile test is performed by raising the crosshead 11 with respect to the test piece TP gripped at both ends by the lower gripping tool 15.

  The test strip supply apparatus 2 accommodates a plurality of test strips TP to be used for a test, and transports a test strip TP one by one (for example, a transport robot such as a transport robot that sucks and holds the test strip TP with a suction pad) ) To the gripping position of the test piece TP by the upper grip 14 and the lower grip 15 of the testing machine body 1.

  When the test piece TP is gripped by the upper gripping tool 14 and the lower gripping tool 15, in the tester main body 1, the crosshead 11 is raised by the control of the control circuit 17, and a tensile load is applied to the test specimen TP. The test force at that time is detected by the load cell 16 disposed in the crosshead 11, and the detection signal is sent to the control circuit 17.

  When the test piece TP is broken, the control of the control circuit 17 stops the rise of the cross head 11 and the tensile test is finished. Thereafter, the broken test piece TP after being held by the upper gripping tool 14 and the lower gripping tool 15 is collected by the test piece collecting device 50 and discarded in the collection box 21.

  The test piece collection device 50 is disposed on the back side of the test machine main body 1 shown in FIG. 1, and includes a first collection unit 51 for collecting the test piece TP held by the lower gripping tool 15, and an upper grip. And a second recovery part 61 for recovering the test piece TP gripped by the tool 14.

  FIG. 2 is a schematic diagram showing a main part of the test strip collecting apparatus 50, and FIG. 3 is a schematic side view thereof. FIG. 2 is a view of the specimen collection device 50 as seen from the back side of the tester main body 1 of FIG. 2 and 3, a first gripping part 57 in the first recovery part 51 and a second gripping part 67 in the second recovery part 61 to be described later are gripped by the lower gripper 15 and the upper gripper 14, respectively. A state is shown in which the test piece TP after the test is disposed at a collection position where the first gripping part 57 and the second gripping part 67 are gripped and recovered.

  The first recovery unit 51 is connected to the base 18 via support members 52 and 53. The first collection unit 51 includes a first holding unit 57 for holding and collecting the test piece TP held by the lower gripping tool 15, a first arm 56 that supports the first holding unit 57, and A first rotating motor 54 is provided as a first moving mechanism for turning the first arm 56. The first grip 57 has a pair of fingers 58 that are disposed at the tip of the first arm 56 and can be opened and closed by an air cylinder provided in the first grip 57.

  The end of the first arm 56 opposite to the side on which the first grip 57 is disposed is fixed to the rotation shaft 55 of the first rotary motor 54. As a result, the first arm 56 turns by the rotation of the first rotation motor 54 and moves the first gripping part 57 that grips the test piece TP to the disposal position of the test piece TP above the collection box 21.

The second collection unit 61 is connected to the frame 12 via a support member 62. The support member 62 includes an elevating / lowering mechanism (not shown) that moves the second collection unit 61 as the gripping position of the test piece TP by the upper gripping tool 14 moves as the crosshead 11 moves up and down. . The second collection unit 61 includes a second holding unit 67 for holding and collecting the test piece TP held by the upper gripping tool 14, a second arm 66 supporting the second holding unit 67, A second rotary motor 64 that turns the second arm 66 and a slide mechanism 70 that linearly moves them are provided.

  The second grip 67 has a pair of fingers 68 that are disposed at the distal end of the second arm 66 and can be opened and closed by an air cylinder provided in the second grip 67. The end of the second arm 66 opposite to the side on which the second grip 67 is disposed is fixed to the rotary shaft 65 of the second rotary motor 64. As a result, the second arm 66 is turned by the rotation of the second rotary motor 64, and the second holding portion 67 holding the test piece TP is moved to the disposal position of the test piece TP by the turning of the first arm 56. One grip part 57 is moved vertically above.

The slide mechanism 70 has a movable portion 72 in which two rails are disposed, and an engaging portion 71 in which a block that engages with the rails is disposed. The movable portion 72 is connected to the second rotary motor 64 via a connecting member 73, and the engaging portion 71 is connected to the support member 62. The movable portion 72 is configured to be movable in the direction perpendicular to the paper surface in FIGS. 1 and 2 and in the left-right direction in FIG. 3 by driving an air cylinder (not shown). Thereby, the second gripping part 6 7, while holding the test piece TP, while turning by the rotation of the second rotary motor 64, linearly moved by the slide mechanism 70. The second rotating motor 64 and the slide mechanism 70 constitute a second moving mechanism of the present invention.

  Next, the recovery operation of the test piece TP after the end of the test in the material testing machine configured as described above will be described. FIG. 4 is an explanatory view schematically showing how the second collection part 61 collects the test piece TP from the upper gripping tool 14. FIG. 4A shows a state before the test piece collection operation is executed, and FIG. 4B shows a state in which the test piece TP is collected and the second arm 66 is swung so that the pair of fingers 68 FIG. 4C shows a state where the test piece TP has been moved to the collection position where the test piece TP is gripped. FIG. 4C shows a state where the second arm 66 is turned from the collection position and the test piece TP is taken out from the upper gripping tool 14. ) Shows a state where the second arm 66 and the like are linearly moved. FIG. 4 is a view of the upper gripping tool 14 and the second recovery part 61 as viewed from the bottom surface side. FIG. 5 is a schematic side view showing the discarding operation of the test piece TP by the first recovery part 51 and the second recovery part 61.

  The test piece TP after the end of the tensile test becomes a broken piece torn at the center thereof, and is held by each of the upper gripping tool 14 and the lower gripping tool 15. First, in the 2nd collection | recovery part 61, the rotating shaft 65 is rotated by the drive of the 2nd rotation motor 64, and the 2nd arm 66 is rotated from the position shown to Fig.4 (a) to the position shown in FIG.4 (b). Thereby, the pair of fingers 68 in the opened state are moved to a position where the test piece TP held by the upper gripping tool 14 is arranged between them. In the state shown in FIG. 4B, the pair of fingers 68 are closed by the air cylinder, the test piece TP is sandwiched between the pair of fingers 68, and the gripping of the test piece TP by the upper gripping tool 14 is released. Thereafter, as shown in FIG. 4C, the second arm 66 is turned in a state where the test piece TP is sandwiched between the pair of fingers 68. Thereby, the test piece TP is removed from the upper gripping tool 14. At this time, the test piece TP is disposed at a position vertically above the disposal position in the first recovery unit 51 shown in FIG.

  After the turning of the second arm 66, the second arm 66 is further linearly moved by the slide mechanism 70 described above to the position indicated by the phantom line in FIG. 4D and FIG. And the test piece TP gripped by this is moved to the disposal position of the test piece TP in the second recovery unit 61. Then, by releasing the gripping force on the test piece TP removed from the upper gripping tool 14 by the pair of fingers 68, the test piece TP is dropped onto the collection box 21, and the test piece TP is recovered from the upper gripping tool 14. Complete.

  That is, the slide mechanism 70 rotates the second arm 66 and moves the second gripping part 67 moved vertically above the test piece discarding position in the first recovery unit 51 to the test piece in the first recovery unit 51. It is linearly moved to a position that is different in the horizontal direction from the position above the TP disposal position. The position that differs in the horizontal direction from the vertically upper position of the discard position of the test piece TP in the first recovery portion 51 is the discard position of the test piece TP above the recovery box 21 in the second recovery portion 61.

  On the other hand, the recovery of the test piece TP from the lower gripping tool 15 by the first recovery unit 51 is performed by the same operation as the operation of the second recovery unit 61 described with reference to FIGS. 4 (a) to 4 (c). Is called. In addition, in the 1st collection | recovery part 51, when a pair of finger 58 moves to the position shown in FIG.4 (c), the holding force to the test piece TP collect | recovered from the lower grip 15 by this pair of finger 58 is released. To do. As a result, the test piece TP is dropped onto the collection box 21 and the collection of the test piece TP from the lower gripping tool 15 is completed.

In this embodiment, the first arm 56, the first rotation motor 54, and the first gripping portion 57 in the first recovery unit 51 are respectively the second arm 66 and the second rotation motor in the second recovery unit 61. 6 4 , each of the second gripping portions 67 is composed of a member having the same shape. The first recovery part 51 and the second recovery part 61 are arranged vertically so that the center line of the rotary shaft 55 of the first rotary motor 54 and the rotary shaft 65 of the second rotary motor 64 coincide with each other. The turning angle of the arm 56 and the second arm 66 is the same angle. Therefore, when the first arm 56 and the second arm 66 are turned from the collection position of the test piece TP shown in FIG. 4 (b) to the position shown in FIG. 4 (c), as shown in FIG. The first gripper 57 moves to a disposal position where the gripping force on the test piece TP is released, and the second gripper 67 moves vertically above the first gripper 57. In the second recovery unit 61, the slide mechanism 70 further linearly moves the second rotary motor 64, the second arm 66, and the second gripping unit 67 connected to the movable unit 72. Thereby, the 2nd holding | grip part 67 is moved to the disposal position different in the horizontal direction from the disposal position of the test piece TP in the 1st collection | recovery part 51. FIG.

  As shown in FIG. 5, the position where the test piece TP collected by the first collection unit 51 falls in the collection box 21 is different from the position where the test piece TP collected by the second collection unit 61 falls. Thus, the test piece TP is not stacked on one pile in the collection box 21. Accordingly, the swiveling operation of the first arm 56 is hindered by the test piece TP after the test stacked at a position higher than the collection box 21 before the tensile test on the predetermined number of test pieces TP is completed. The recovery operation of the test piece TP can be surely continued until the test for the set number of test pieces is completed.

  Next, another embodiment of the present invention will be described. FIG. 6 is a schematic side view showing a test strip TP discarding operation by the first recovery unit 51 and the second recovery unit 61 according to another embodiment. In addition, about the member same as embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In this embodiment, the second collection unit 61 further includes a wiping member 69. The wiping member 69 is caught on the upper surface of the first arm 56 and the first gripping portion 57 and falls into the collection box 21 even though the gripping force to the test piece TP by the first gripping portion 57 is released. This is for sweeping away the test piece TP that was not.

As shown in FIG. 6, the wiping member 69 is a hook-like member that is disposed on the second arm 66 and has tips that reach the upper surfaces of the first arm 56 and the first gripping portion 57. This wiping member 69 is driven by the first rotation motor 54 and the second rotation motor 64, and after the first gripping portion 57 and the second gripping portion 67 are arranged at the positions indicated by solid lines in FIG. the slide mechanism 70 in the section 61, the movable portion 72, the second rotation motor 64, the second arm 66 and the second gripper 6 7, when the linear movement to the position indicated by the two-dot chain line in FIG. 6, the first arm 56 and the upper surface of the 1st holding part 57 are wiped off.

The disposition position of the wiping member 69 is not limited to the mode shown in FIG. 6 and may be disposed on the rotation shaft 65 or the second gripping portion 67 of the second rotation motor 64. Depending on the material of the test piece TP, the test piece TP is extended by the tensile test, and the portion where the broken piece is extended hangs down due to gravity. For this reason, even if the pair of fingers 58 are opened and the gripping force on the test piece TP by the first gripping portion 57 is released, the extended test piece TP may be caught by the fingers 58 and not fall into the collection box 21. In such a case, by disposing the wiping member 69 on the protruding surfaces of the fingers 68 of the second gripping part 6 7, it can be dropped sweeping a test piece TP was caught in a pair of fingers 58 more reliably.

DESCRIPTION OF SYMBOLS 1 Test machine main body 2 Test piece supply apparatus 11 Crosshead 12 Frame 14 Upper gripping tool 15 Lower gripping tool 16 Load cell 17 Control circuit 18 Base 50 Test strip collection | recovery apparatus 51 1st collection | recovery part 52 Support member 53 Support member 54 1st rotation Motor 55 Rotating shaft 56 First arm 57 First gripping portion 58 Finger 61 Second collecting portion 62 Support member 64 Second rotating motor 65 Rotating shaft 66 Second arm 67 Second gripping portion 68 Finger 69 Wiping member 71 Engaging portion 72 Movable part 73 Connecting part TP Test piece

Claims (4)

A test strip supply device for supplying a test strip to a test position, a load mechanism for applying a load to the test strip gripped at both ends by the upper gripper and the lower gripper, and a test strip recovery device for recovering the test strip after the test In a material testing machine equipped with
The test piece collecting apparatus is
A first gripping part for gripping a test piece after the test gripped by the lower gripping tool;
A first arm that supports the first gripping portion;
By rotating the first arm, the first gripping portion grips the test piece and collects the test piece from the lower gripping tool, and the gripping force to the test piece by the first gripping portion is released. A first moving mechanism for moving the first gripping portion between a disposal position for discarding the test piece,
First recovery means having
A second gripping part that is disposed above the first recovery means and grips the test specimen after the test gripped by the upper gripping tool;
A second arm that supports the second gripping portion;
The collection position at which the second gripping part grips the test piece and collects the test piece from the upper gripping tool by turning and linearly moving the second arm, and the gripping force on the test piece by the second gripping part A second moving mechanism for moving the second gripping portion between a disposal position different in the horizontal direction from the disposal position of the test piece in the first recovery means for releasing the test piece and disposing the test piece,
A second recovery means having
A material testing machine comprising: The material testing machine according to claim 1,
The first moving mechanism is a first rotating motor that pivotally supports the first arm by a rotating shaft;
The second moving mechanism is a material testing machine including a second rotating motor that pivotally supports the second arm by a rotating shaft, and a slide mechanism connected to the second rotating motor. The material testing machine according to claim 2,
The second moving mechanism drives the second rotary motor that supports the second arm to drive the second rotary motor and discards the test piece. After moving upward, the second gripping portion is moved in the horizontal direction different from the vertical upper position of the test piece discarding position in the first recovery means by driving the slide mechanism connected to the second rotary motor. To move the material testing machine. The material testing machine according to claim 3,
The second tester is a material testing machine including a wiping member that wipes the upper surface of the first arm or the first gripping portion.

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