Material testing machine

Abstract

To efficiently recover a broken piece.SOLUTION: In a material testing machine which is provided with freely openable and closable gripping tools 22,23 and applies a test load to a test piece gripped by the gripping tools 22,23, a recovery shooter 40 for recovering a broken piece after the test is provided on the lower side in the vertical direction in a state where the gripping tools 22,23 are opened.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a material testing machine.

Background Art

[0002] Conventionally, an automatic material testing machine that automatically performs tensile tests, fatigue tests, etc. is known. An automatic material testing machine generally includes a test piece recovery device that recovers a broken test piece (hereinafter referred to as a broken piece) after the test (see, for example, Patent Document 1). A conventional test piece recovery device grabs and recovers the end of the broken piece with a recovery hand.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, conventionally, when a test piece breaks near the gripper of a material testing machine, the recovery hand cannot successfully recover the broken piece. Therefore, in an automatic material testing machine, conventionally, even when the next test piece is conveyed, the gripper of the material testing machine cannot grip the next test piece in a normal state, and the automatic operation has to be stopped once. Also, conventionally, in a material testing machine without a recovery hand, the broken piece has to be manually recovered, which has been troublesome for the user. An object of the present invention is to solve the problems of the above-described conventional technologies and provide a material testing machine that can efficiently recover broken pieces.

Means for Solving the Problems

[0005] An aspect of the present invention is a material testing machine equipped with a grip that can be opened and closed, for applying a test load to a test piece gripped by the grip, wherein a recovery chute for collecting the broken fragments after testing is located vertically downward when the grip is open. And a forward actuator that moves the aforementioned recovery chute forward, This relates to a materials testing machine equipped with the following features. Another aspect of the present invention relates to a material testing machine equipped with a grip that can be opened and closed, for applying a test load to a test piece gripped by the grip, the material testing machine further comprising: an extrusion mechanism for extruding fragments remaining between the grips; and a retrieval hand for collecting the fragments after testing from between the grips, wherein if the fragments cannot be collected by the retrieval hand, the extrusion mechanism is operated to extrude. [Effects of the Invention]

[0006] According to an aspect of the present invention, the fragments after testing fall into the recovery chute by their own weight and are collected, thus enabling efficient collection of the fragments. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic diagram of a material testing machine according to the first embodiment. [Figure 2] This is a front view showing the main components of a material testing machine. [Figure 3] This is a side view of the same object. [Figure 4] This is an enlarged view of section A in Figure 3. [Figure 5] This is a perspective view showing the main components of a materials testing machine. [Figure 6] This is a diagram showing the processing flow. [Figure 7] This diagram shows the processing flow of S6 in Figure 6. [Figure 8] This is a schematic diagram of a material testing machine according to the second embodiment. [Figure 9] This diagram shows the same processing flow. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] Figure 1 is a front view of the automated material testing machine 1 according to the first embodiment. The automated material testing machine (material testing machine) 1 comprises a test specimen supply device 10, a testing device 30, a test specimen retrieval device 50, and a control device 100. The test specimen supply device 10 comprises a storage section 12 for storing pallets 11, a mounting table 13 positioned adjacent to the storage section 12 on which the pallets 11 rest, a measuring device 14 for measuring the test specimen T when transporting the pallets 11 from the storage section 12 to the mounting table 13, and a transport device 20 for removing the test specimen T from the pallets 11 supplied to the mounting table 13 and transporting it to the test device 30. The mounting table 13 comprises a table 13A on which the pallet 11 rests, and a plurality of rollers 13B that guide the pallet 11. The transport device 20 comprises an arm 26 equipped with a suction pad 29. The transport device 20 removes and holds the test pieces T one by one from the pallet 11 using the suction pad 29 and supplies the test pieces T to the testing device 30. The measuring device 14 comprises a backing material 14A and a measuring gauge 14B, and measures the thickness W of the test piece T.

[0009] The test apparatus 30 has a table 32. A pair of support columns 33 are erected on the table 32. A cross yoke 34 is stretched across the top of the support columns 33. Inside the support columns 33 is a threaded rod (not shown). The threaded rod is made of a ball screw, and both ends of a crosshead 35 are connected to the threaded rod. The crosshead 35 moves up and down relative to the table 32 by the rotation of the threaded rod. A load cell 36 is installed on the crosshead 35. A coupling 37 is attached to the load cell 36, and an upper gripper 38 is connected to the lower end of the coupling 37. The upper gripper 38 has a pair of gripping teeth 38A and 38B, and each gripping tooth 38A and 38B can be opened and closed by a cylinder device (not shown), and when each gripping tooth 38A and 38B is closed, it grips the upper end Ta of the test piece T.

[0010] A lower gripping device 39 is positioned below the upper gripping device 38. The lower gripping device 39 is fixed to the upper surface of the table 32. The lower gripping device 39 has a pair of gripping teeth 39A and 39B, each of which can be opened and closed by a cylinder device (not shown) and grips the lower end Tb of the test piece T. The test piece T is gripped by the upper gripping device 38 and the lower gripping device 39, and the crosshead 35 is raised to apply a test force to the test piece T. The load cell 36 measures the test force applied by the upper gripper 38. The measurement signal of the load cell 36 is input to the control device 100.

[0011] The test piece recovery device 50 recovers the test piece T (hereinafter referred to as the broken piece TH) that has broken during the test from between the upper gripper 38 and the lower gripper 39. The test piece recovery device 50 includes an upper recovery device 51 and a lower recovery device 55. The upper recovery device 51 includes an upper recovery mechanism 52 and an upper support mechanism 53 that supports the upper recovery mechanism 52. The upper recovery mechanism 52 includes an upper recovery hand 54, and the upper recovery hand 54 has a gripping tool (not shown) at its tip. The upper recovery mechanism 52 grips the broken piece TH with the gripping tool and rotates the upper recovery hand 54 to recover the broken piece TH from the upper gripper 38. The upper recovery device 51 is fixed to the crosshead 35 and is movable up and down together with the crosshead 35.

[0012] The lower recovery device 55 includes a lower recovery mechanism 56 and a lower support mechanism 57 that supports the lower recovery mechanism 56. The lower recovery mechanism 56 includes a lower recovery hand 58, and the lower recovery hand 58 has a gripping tool (not shown) at its tip. The lower recovery mechanism 56 grips the broken piece TH with the gripping tool and rotates the lower recovery hand 58 to recover the broken piece TH from the lower gripper 39. The lower recovery device 55 is fixed to the table 32.

[0013] The control device 100 is connected so as to be able to transmit and receive signals to and from the automatic material testing machine 1. The signals received are measurement signals output by the dimension measuring device 14, measurement signals output by the load cell 36, and appropriate signals required for control and testing. The signals transmitted to the automatic material testing machine 1 are control signals for the test piece supply device 10, control signals for the cylinder devices (not shown) of the grippers 38 and 39, control signals for the motors of the screw rods (not shown), control signals for the recovery devices 51 and 55, and other appropriate signals required for control and testing.

[0014] The control device 100 includes a computer, which comprises a processor such as a CPU (Central Processing Unit) or an MPU (Micro-Processing Unit), a memory device such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a storage device such as a HDD (Hard Disk Drive) or a SSD (Solid State Drive), and an interface circuit for connecting the control device 100 and various peripheral devices. Then, by the processor executing a computer program stored in the memory device or the storage device, various functions of the automatic material testing machine 1 are realized.

[0015] FIG. 2 is a front view showing the structure of the main part of the test device 30 according to the present embodiment, and FIG. 3 is a side view also showing the structure of the main part of the test device 30. The test device 30 includes a collection chute 40 below the lower gripping tools 38 and 39 in the vertical downward direction with the upper and lower gripping tools 38 and 39 open, and below the lower gripping tool 39. The collection chute 40 is a trough-shaped member with an open upper side as shown in FIG. 2 (see FIG. 5). For convenience of explanation, the collection chute 40 is not shown in FIG. 1.

[0016] As shown in FIG. 3, the collection chute 40 is connected to the collection chute drive mechanism 42. The collection chute drive mechanism 42 includes two forward air cylinders (forward actuators) 43 arranged on both sides of the collection chute 40 (see FIG. 5), and a moving body 44 to which the rods of the two forward air cylinders 43 are connected. A connecting piece 46 is hinged to the upper part of the moving body 44 via a pin 45, and the connecting piece 46 is fixed to the lower surface of the collection chute 40. A single push-up air cylinder (push-up actuator) 47 is positioned vertically on the underside of the recovery chute 40. A roller 48 is connected to the tip of the rod of the push-up air cylinder 47, and the roller 48 contacts the underside of the recovery chute 40 (see Figure 5). 49 is a guide roller, and 81 is a tension spring.

[0017] The recovery chute 40 is driven by the forward air cylinder 43 and is able to reciprocate horizontally between the position shown by the solid line in Figure 3 (entry position) and the position shown by the dashed line (discharge position of the fragments TH). At the entry position, the recovery chute 40 is in a horizontal position, with its rear end entering below the lower grip 39. As the recovery chute 40 moves forward toward the discharge position of the fragments TH, it is pushed up by the push-up air cylinder 47, causing its tip to be inclined downwards. In this case, as shown by the dashed line in Figure 3, the recovery chute 40 is pulled by the tension spring 81, stabilizing its inclined position. A collection box 82 (see Figure 5) for collecting fragments TH is positioned in the lower area of ​​the inclined collection chute 40.

[0018] The lower gripping device 39 is equipped with a lower extrusion mechanism (extrusion mechanism) 61 at its upper rear portion. The lower extrusion mechanism 61 and the recovery chute 40 constitute a fragment recovery mechanism. Figure 4 is an enlarged view of section A in Figure 3. As shown in Figure 4, the downward extrusion mechanism 61 includes a forward extrusion air cylinder (forward extrusion actuator) 63 that extends and retracts horizontally, a bracket 64 connected to the rod of the forward extrusion air cylinder 63, and a downward extrusion tool 65 connected to the bracket 64. The lower extrusion mechanism 61 pushes the remaining fragments TH between the gripping teeth 39A and 39B forward through the forward movement of the lower extrusion tool 65. As shown in Figure 2, the lower extrusion tool 65 is approximately rectangular in shape when viewed from the front, and its width is set to be approximately equal to the distance between the gripping teeth 39A and 39B when the lower gripping tool 39 is open. In the lower gripping device 39, the lower end Tb of the fragment TH is gripped by at least the upper half of the gripping teeth 39A and 39B. To effectively scrape out the fragments TH, the lower end edge 65A of the lower extruder 65 extends downward beyond the center of the gripping teeth 39A, 39B and faces adjacent to the upper end edge 40B of the back wall 40A of the recovery chute 40.

[0019] As shown in Figures 2 and 3, the upper gripper 38 is equipped with an upper extrusion mechanism (extrusion mechanism) 67 for extruding the remaining fragments TH between the gripping teeth 38A and 38B vertically downward. The upper extrusion mechanism 67 comprises a vertically extending and retracting downward extrusion air cylinder (downward extrusion actuator) 68, a connecting piece 69 connected to the rod of the downward extrusion air cylinder 68, and an upper extrusion device 70 fixed to the connecting piece 69. The downward extrusion air cylinder 68 is fixed to the upper surface of the upper gripper 38 via a bracket 71. The width dimension of the upper extrusion device 70 is set to be approximately equal to the dimension between the gripping teeth 38A and 38B when they are open.

[0020] Figure 5 is a perspective view showing the area around the lower gripping device 39. In Figure 5, the same reference numerals are used for parts identical to those in Figures 1 to 4, and their descriptions are omitted. A gripping tooth open / closed confirmation sensor 75 is positioned near the lower gripping device 39 to detect the open / closed state of the gripping teeth 39A and 39B.

[0021] The gripping teeth 39A and 39B are positioned in the opening 72A of the main body structure 72. The gripping teeth 39A and 39B are capable of protruding from the opening 72A toward the test piece T. When the gripping teeth 39A and 39B are fully open, as shown in Figure 5, the tooth surfaces of the gripping teeth 39A and 39B are recessed from the main body structure 72, and a depression δ is formed in the main body structure 72. In this state, if a fragment TH falls near the lower gripping device 39, or if the fragment TH is pushed out by the lower extrusion mechanism 61, there is a risk that the fragment TH will get caught in the depression δ.

[0022] In this embodiment, prior to operating the downward extrusion mechanism 61 described above, the gripping teeth 39A and 39B are moved slightly forward to fill the recess δ. The gripping tooth opening / closing confirmation sensor 75 detects when the tooth surfaces of the gripping teeth 39A and 39B reach a position where the recess δ is filled and the distance between the tooth surfaces of the gripping teeth 39A and 39B matches the width dimension of the lower extruder 65, and outputs a signal to the control device 100.

[0023] Furthermore, a recovery confirmation sensor 73 is positioned near the lower gripping device 39 to detect fragments TH passing along the rotational trajectory of the recovery hand 58. The recovery confirmation sensor 73 is a sensor that confirms whether or not the fragment TH has been recovered by the recovery hand 58. Since the recovery hand 58 is configured to grasp the fragment TH with a pair of gripping devices, the fragment TH cannot be recovered properly unless the end of the fragment TH protrudes sufficiently from between the gripping teeth of the gripping devices 38 and 39. If the protrusion of the end of the fragment TH is insufficient, the recovery of the fragment TH by the recovery hand 58 will fail, and the fragment TH will remain inside the gripping devices 38 and 39.

[0024] In this embodiment, if the recovery confirmation sensor 73 detects a fractured fragment TH, the recovery of the fractured fragment TH by the recovery hand 58 is considered successful, and a signal indicating success is output to the control device 100. When this signal is output, the next test piece is supplied to the gripping teeth of the test device 30 via the test piece supply device 10, and the next tensile test is performed. If the recovery confirmation sensor 73 does not detect a fractured fragment TH, the recovery of the fractured fragment TH by the recovery hand 58 is considered unsuccessful, and a signal indicating failure is output to the control device 100.

[0025] Next, the operation of the first embodiment will be explained according to the processing flow shown in Figure 6. A test specimen T is supplied between the gripping teeth of the test device 30 (S1). The test device 30 applies a tensile load to the test specimen T, and a tensile test of the test specimen T is performed (S2). The test specimen retrieval device 50 is operated to collect the fractured fragments TH from between the gripping teeth (S3). The test specimen retrieval device 50 grasps the fractured fragments TH with the gripping device (not shown) of the retrieval hand 58 and discharges the fractured fragments TH outside the gripping device 21.

[0026] Next, it is determined whether the recovery of the fragments TH by the specimen recovery device 50 was successful (S4). Success or failure is determined by the recovery confirmation sensor 73 detecting the presence or absence of fragments TH. If the recovery confirmation sensor 73 detects "fractures TH present" (YES), the recovery of the fragments TH is considered successful, and the next specimen is supplied (S5), and the tensile test of the next specimen continues (S2). If the recovery confirmation sensor 73 detects "fractures TH absent" (NO), the recovery of the fragments TH is considered unsuccessful, and the process moves to the recovery of the fragments TH by the recovery chute 40 (S6).

[0027] Figure 7 shows the processing flow of S6. Prior to the retrieval operation, the gripping teeth of the upper gripping device 38 and the lower gripping device 39 are opened to a predetermined position (S7). In the lower gripping device 39, the gripping teeth 39A and 39B are advanced to a predetermined position detected by the gripping tooth opening / closing confirmation sensor 75. Alternatively, the gripping teeth 39A and 39B are fully opened and then closed for a preset number of seconds. As shown in Figure 5, this is done to fill the recess δ of the opening 72A of the main body structure 72 and to match the distance between the tooth surfaces of the gripping teeth 39A and 39B with the width dimension of the lower extruder 65. Upon opening S7, the fragment TH falls by its own weight onto the recovery chute 40 located below the lower grip 39.

[0028] Next, the control device 100 outputs an operation signal to the downward extrusion air cylinder 68 (S8). By extending and retracting (lowering and raising) the rod of the downward extrusion air cylinder 68, the upper extrusion tool 53 moves down and up near the gripping teeth 38A and 38B of the upper gripping tool 38, causing the fragments TH stuck to the gripping teeth 38A and 38B to fall towards the lower gripping tool 39. An operation signal is output from the control device 100 to the forward-pushing air cylinder 63 (S9). When the forward-pushing air cylinder 63 operates, the fragments TH are pushed forward from between the lower grippers 39. With this configuration, even if the fragments TH are stuck to the gripping teeth, the fragments TH can be reliably collected on the recovery chute 40. The rod of the forward push air cylinder 63 is retracted, and the lower push tool 65 is moved backward (S10). The fragments TH are then left lying on the recovery chute 40.

[0029] The rod of the forward air cylinder 43 is extended, and the recovery chute 40 is advanced to a predetermined position where the far end of the recovery chute 40 is released from the underside of the lower grip 39 (S11). Next, at the predetermined position, the push-up air cylinder 47 is operated, and the push-up air cylinder 47 is raised (S12). This tilts the recovery chute 40, causing the fragments TH to fall into the recovery box 82 in front of the recovery chute 40. While the push-up air cylinder 47 remains raised, the forward air cylinder 43 is retracted, causing the recovery chute 40 to retract (S13). This increases the incline of the recovery chute 40. By increasing the incline of the recovery chute 40, fragments TH that did not fall in the initial operation can be reliably collected into the recovery box 82. The push-up air cylinder 47 is lowered, the recovery chute 40 is retracted (S14), and the recovery chute 40 is returned to the position shown by the solid line in Figure 3, thus ending the process.

[0030] According to this embodiment, even if the fragment TH breaks near the gripping teeth and the recovery hand 58 cannot successfully recover the fragment TH, the recovery chute 40 can reliably recover the fragment TH. By not leaving the fragment TH near the upper gripping device 38 or the lower gripping device 39, the next test piece T can be gripped between the gripping teeth in a normal state, and the tensile test can be continued. Continuous automatic operation can be performed without stopping the automatic operation.

[0031] [Second Embodiment] Figure 8 is a side view showing the second embodiment. In Figure 8, the same reference numerals are used for the same parts as in Figure 3, and their descriptions are omitted. In the second embodiment of the automatic material testing machine 1, the fragments TH are collected exclusively by the recovery chute 40. That is, in the second embodiment, there is no test piece recovery device 50 (see Figure 1). This automatic material testing machine 1 is equipped with an upper extrusion mechanism 67 and a lower extrusion mechanism 61, similar to the first embodiment, in order to collect the fragments TH that have adhered to the gripping teeth. The recovery chute 40 itself has a structure almost identical to that of the first embodiment, but this recovery chute 40 is fixed in a pre-inclined state below the lower gripping device 39.

[0032] The operation of the second embodiment will be explained according to the processing flow shown in Figure 9. A test specimen T is supplied between the gripping teeth of the testing device 30 (S21). The testing device 30 applies a tensile load to the test specimen T, and a tensile test of the test specimen T is performed (S22). To collect the fractured fragments TH after the test, the gripping teeth of the upper grip 38 and the lower grip 39 are opened to a predetermined position (S23). Due to the opening operation in S13, the fractured fragments TH fall by their own weight onto the collection chute 40 located below the lower grip 39.

[0033] Next, the control device 100 outputs an operation signal to the downward extrusion air cylinder 68 (S24). By extending and retracting (lowering and raising) the rod of the downward extrusion air cylinder 68, the upper extrusion tool 70 moves down and up near the gripping teeth 38A and 38B of the upper gripping tool 38, causing the fragments TH stuck to the gripping teeth 38A and 38B to fall towards the lower gripping tool 39. An operation signal is output from the control device 100 to the forward-pushing air cylinder 63 (S25). When the forward-pushing air cylinder 63 operates, the fragments TH are pushed forward from between the lower grippers 39. With this configuration, even if the fragments TH are stuck to the gripping teeth, the fragments TH can be reliably collected onto the recovery chute 40. Also, because the recovery chute 40 is inclined, the fragments TH can slide down.

[0034] According to the second embodiment, the recovery chute 40 can reliably recover the fragments TH. Furthermore, if this recovery chute 40 is applied to an automatic tensile testing machine, the fragments TH are reliably recovered, allowing the next test piece T to be gripped between the gripping teeth in a normal state, and enabling continuous automatic operation without having to stop the automatic operation.

[0035] [Another embodiment] In the first and second embodiments, a material testing machine in which an upper grip 38 and a lower grip 39 are arranged vertically above and below each other was described as an example, but the disclosure is not limited thereto. The invention can also be applied to material testing machines in which the grips are not arranged vertically, for example, in which the grips are arranged side by side horizontally, or in which the grips are arranged side by side diagonally. In this case, a recovery chute for collecting the fragments after testing is positioned vertically below each grip when it is open. Furthermore, an extrusion mechanism may be provided to push the fragments TH remaining between the gripping teeth of each gripping tool toward the recovery chute 40.

[0036] Those skilled in the art will understand that the exemplary embodiments and modifications described above are specific examples of the following embodiments.

[0037] (Section 1) A material testing machine according to one embodiment is equipped with a grip that can be opened and closed, and applies a test load to a test piece gripped by the grip, and is equipped with a recovery chute on the vertically downward side when the grip is opened to collect the broken fragments after testing. According to the material testing machine described in paragraph 1, when the gripping device is opened after the test, the fragments fall straight down due to their own weight, and can be reliably collected by the recovery chute.

[0038] (Section 2) In the material testing machine described in paragraph 1, the gripping device comprises an upper gripping device and a lower gripping device, and the recovery chute is provided below the lower gripping device. According to the material testing machine described in Section 2, when the grips are opened after the test, the fragments held by the upper and lower grips fall straight down and can be recovered by the recovery chute.

[0039] (Section 3) The material testing machine described in paragraph 1 or 2 is further equipped with an extrusion mechanism for extruding the remaining fragments between the grips. According to the material testing machine described in paragraph 3, the extrusion mechanism pushes out any remaining fragments between the grips, allowing them to be reliably recovered by the recovery chute.

[0040] (Section 4) In the material testing machine described in paragraph 3, the extrusion mechanism comprises an upper extrusion mechanism and a lower extrusion mechanism, wherein the upper extrusion mechanism extrudes the fragment downward by a downward movement, and the lower extrusion mechanism extrudes the fragment forward by a forward movement. According to the material testing machine described in paragraph 4, the upper extrusion mechanism pushes the fragments downward by a downward movement, so that the fragments can be reliably placed on the recovery chute, and the lower extrusion mechanism pushes the fragments forward by a forward movement, so that the fragments accumulated on the recovery chute can be reliably recovered by the recovery chute.

[0041] (Section 5) The material testing machine described in paragraph 3 or 4 is equipped with a recovery hand for recovering the broken fragments after testing from between the grips, and if the broken fragments cannot be recovered by the recovery hand, the extrusion mechanism is made to extrude. According to the material testing machine described in paragraph 5, first, the fragments are collected by the collection hand, and if the fragments cannot be collected by the collection hand, the extrusion mechanism is operated to extrude, thereby ensuring that the fragments are reliably collected by the collection chute.

[0042] (Section 6) In the material testing machine described in any one of paragraphs 1 to 5, the recovery chute is tilted downwards towards the front. According to the material testing machine described in paragraph 6, the recovery chute is tilted downwards, so that the fragments slide along the recovery chute and are collected.

[0043] (Section 7) A material testing machine according to any one of paragraphs 1 to 5 is provided with a forward actuator for advancing the recovery chute. According to the material testing machine described in paragraph 7, the recovery chute is retracted to the underside of the grip to collect the fragments, and the recovery chute is advanced from the underside of the grip to discharge the fragments, thereby ensuring that the fragments are discharged outside the grip.

[0044] (Section 8) The material testing machine described in the seventh image is equipped with a push-up actuator that pushes up the far end of the recovery chute after it has moved forward. According to the material testing machine described in paragraph 8, the push-up actuator causes the recovery chute to tilt downwards, so that the fragments slide down the recovery chute and are collected.

[0045] (Section 9) In the material testing machine described in paragraph 8, the angle of inclination of the recovery chute is changed. According to the material testing machine described in paragraph 9, the angle of inclination of the recovery chute changes, and as a result of the change in angle, the fragments are shaken off from the recovery chute and collected.

[0046] (Section 10) In the material testing machine described in any one of paragraphs 1 to 9, a collection box for collecting the fragments is provided in front of the collection chute. According to the material testing machine described in paragraph 10, a collection box is provided in front of the collection chute, so that the fragments are reliably collected in the collection box. [Explanation of symbols]

[0047] 1. Automatic material testing machine (material testing machine) 10. Test specimen feeding device 30 Test equipment 38 Upper gripping tool 38A, 38B gripping teeth 39 Lower gripping tool 39A, 39B gripping teeth 40 Recovery Shooters 43. Forward air cylinder (forward actuator) 47. Push-up air cylinder (push-up actuator) 50 Test specimen recovery device 51 Upper recovery device 55 Lower recovery device 58 Recovery Hand 61. Lower extrusion mechanism (extrusion mechanism) 63. Forward-pushing air cylinder (forward-pushing actuator) 65 Lower extrusion tool 67. Upper extrusion mechanism (extrusion mechanism) 68. Downward extrusion air cylinder (downward extrusion actuator) 70 Upper extruder 73 Recovery confirmation sensor 75. Sensor for confirming the opening and closing of gripping teeth 82 Collection Boxes 100 Control device TP test specimen TH broken pieces

Claims

1. A material testing machine equipped with a gripping device that can be opened and closed, which applies a test load to a test piece held by the gripping device, A recovery chute for collecting the fragments after testing is located vertically below the open gripping device. A material testing machine comprising a forward actuator for advancing the aforementioned recovery chute.

2. The material testing machine according to claim 1, wherein the gripping device comprises an upper gripping device and a lower gripping device, and the recovery chute is provided below the lower gripping device.

3. The material testing machine according to claim 1 or 2, further comprising an extrusion mechanism for extruding fragments remaining between the gripping tools.

4. The material testing machine according to claim 3, wherein the extrusion mechanism comprises an upper extrusion mechanism and a lower extrusion mechanism, the upper extrusion mechanism extrudes the fragment downward by a downward movement, and the lower extrusion mechanism extrudes the fragment forward by a forward movement.

5. The material testing machine according to claim 3 or 4, further comprising a recovery hand for recovering broken fragments after testing from between the gripping devices, wherein if the broken fragments cannot be recovered by the recovery hand, the extrusion mechanism is operated to extrude.

6. The material testing machine according to any one of claims 1 to 5, wherein the recovery chute is tilted downwards towards the front.

7. The material testing machine according to claim 1, further comprising a push-up actuator that pushes up the far end of the recovery chute after it has moved forward.

8. The material testing machine according to claim 7, wherein the angle of inclination of the recovery chute is changed.

9. The material testing machine according to any one of claims 1 to 8, further comprising a collection box for collecting the fragments in front of the collection chute.

10. A material testing machine equipped with a gripping device that can be opened and closed, for applying a test load to a test piece gripped by the gripping device, An extrusion mechanism for extruding the remaining fragments between the gripping tools, A material testing machine comprising a recovery hand for recovering broken fragments after testing from between the gripping devices, wherein if the recovery hand cannot recover the broken fragments, the machine operates the extrusion mechanism to extrude.

Images