JP4973446B2 - Material testing machine - Google Patents

Description

  The present invention relates to a material testing machine provided with a test piece holding shelf device for loading and holding a large number of test pieces and automatically and sequentially feeding them to a test position.

  In order to automatically perform material tensile tests, etc., we propose an automatic material testing machine that stacks a large number of test pieces on a holding shelf and sequentially and automatically feeds these test pieces to the test position to perform tests. (See Patent Document 1). The automatic material testing machine takes out the test pieces one by one from the holding shelf of the test pieces, transfers them to the test position, attaches them to the chuck, and performs a tensile test. When loading the test pieces on the holding shelf, it is important to position and align the test pieces, and the test piece holding shelf device includes a pressing rod for pressing the stacked test pieces. This pressing rod also serves as a function to prevent the loaded specimen from collapsing.

  This kind of material testing machine according to the present invention includes a testing machine main body TM for performing a tensile test and the like, as shown in FIG. 5, and a tester main body for sequentially holding and holding the test pieces 5 one by one. A holding shelf device HD for the test piece 5 that operates so as to be transferred to the TM side, and a drive device TD that drives the holding shelf device HD up and down. And it is comprised so that the load collapse of the test piece 5 laminated | stacked may not be produced with respect to the transfer of the test piece 5 hold | maintained appropriately while holding the test piece 5. The construction and operation of the material testing machine will be described with reference to FIG.

  FIG. 5 is a view of the holding shelf device HD as viewed from the front upper side, and the testing machine main body TM is disposed on the right side. Reference numeral 4 denotes a holding shelf for loading and holding the test piece 5, which is integrally formed with the back plate 4 </ b> P and has an L shape, and is joined to the support plate 3 so as to be movable up and down. The support plate 3 is fixedly installed on the gantry 2 above the machine base 1 of the test machine main body TM. Reference numeral TD in FIG. 5 is a drive device for transferring the test piece 5, and a drive mechanism for moving the holding shelf 4 up and down is provided therein. Note that the driving device TD is not directly related to the present invention, and thus detailed description thereof is omitted.

  Regarding the transfer of the test piece 5 to the test machine main body TM side, the holding shelf 4 is installed to be movable up and down as described above by the drive of the driving device TD, and the test piece 5 reaches the position of the suction pad 13 waiting on the upper side. Is displaced upward. The suction pad 13 that has sucked the test piece 5 moves to the tester main body TM, and is configured to deliver the test piece 5 to a chuck portion (not shown) in the tester main body TM. The suction pad 13 moves up and down, and reciprocates between the illustrated position and the tester main body TM, but the mechanism is not directly related to the present invention, so it is not shown and will not be described.

  The general description of the material testing machine provided by the present invention is as described above in detail. As described above, in order to prevent the test pieces 5 from collapsing during alignment and transfer of the test pieces 5 to be loaded. A test piece pressing mechanism for pressing the test piece 5 against the back plate 4P of the holding shelf 4 is provided. Such a test piece pressing mechanism is provided with two pressing rods 10 on both sides corresponding to both ends of the test piece 5 in a door form, and will be described below as a pressing door device SD.

  The structure of the pressing door device SD is shown in FIGS. FIG. 5 shows the entire holding shelf device HD for loading and holding a large amount of test pieces 5 as described above, but FIG. 4 shows a specific part in the lower part of the holding shelf device HD. That is, in FIG. 5, the pressing door device SD is installed on the front side of the holding shelf device HD and opens and closes like a door, but does not have a plate-shaped door, but mainly presses the test piece 5 on both sides. A state is shown in which the heel 10, the upper oscillating arm 9 </ b> U that freely oscillates each pressing heel 10, and the lower oscillating arm 9 </ b> D are combined. 2 and 4, reference numeral 1 denotes a machine base.

  By the way, the upper swing arm 9U and the lower swing arm 9D forming the main body stand respectively at the upper part and the lower part of the column 11 erected between the machine base 1 and the upper support frame 6. It is supported by a fixed support shaft 7S. As shown in FIG. 4, the fixed support shaft 7 </ b> S is erected on the upper surface of the support base 7 attached in the vicinity of the upper end portion and the lower end portion of the column 11.

  FIG. 4 is a detailed perspective view showing the structure of the lower end portion of the support 11 as described above, and shows a state in which the fixed support shaft 7S is erected. Of course, as shown in FIG. A support base 7 is also erected at the upper end of the same, and similarly, a fixed support shaft 7S is erected. The base ends of the swing arm 9U and the swing arm 9D are opposed to the upper and lower fixed support shafts 7S, and are supported as shown in FIG. That is, the fixed support shaft 7S is inserted into and engaged with the through hole 9H formed in the base end portion of the swing arm 9D. 9H is a through-hole for a support shaft that is drilled at the base ends of the swing arm 9U and the swing arm 9D. This through hole 9H is shown in FIGS.

  FIG. 4 shows the lower left part of the column 11, but the supporting method for ensuring the swinging of the swinging arm 9D is the same as the way of pivoting the top and bottom of the right column 11. FIG. 6 shows the entire configuration including the positional relationship between the swing arm 9 </ b> D and the test piece 5. In this way, the two swing arms 9U on the upper side and the two swing arms 9D on the lower side can swing, and two are provided on both sides corresponding to both ends of the test piece 5 by the pressing door device SD described above. The pressing rod 10 can press the test piece 5 so that the alignment of the test piece 5 is maintained. Although FIG. 6 shows this pressed state, the pressing bar 10 is left in its position as it is after the test piece 5 is pressed.

JP-A-5-273101

  In the conventional pressing door device SD for the test piece 5 described above, the test piece 5 is on the holding shelf 4 and in contact with the back plate 4P, but the pressing bar 10 is used to position the test piece 5 so that the test piece 5 is positioned. 6, the pressing rod 10 remains in contact with the test piece 5 as shown in FIG. 6. Therefore, when the test piece 5 is transferred to the test position, if the pressing bar 10 is in contact with the test piece 5 during the raising / lowering operation of the holding shelf 4, the transfer supply is hindered.

  In some cases, the load collapse of the test piece 5 occurs. Therefore, after the operator presses the positioning portion of the pressing rod 10 against the test piece 5, the operator needs to retreat the pressing rod for a certain distance (about 1 to 2 mm) so as not to collapse the load. Although this operation seems to be a simple operation, the setting of the evacuation distance is delicate and requires skill, and if it is forgotten, there is a problem that the test piece 5 may collapse.

Material testing machine according to the present invention, in order to solve the above problems, the material testing machine equipped with a holding shelf large number of specimens stacked retention test piece, positioning the collapse of stacked specimens in the holding rack A test piece pressing rod having a blocking function and a retracting mechanism for retracting the pressed pressing rod from the test piece by a small distance are provided .

The retraction mechanism includes a fixed part on the material testing machine stand and a fixed support shaft erected at two points on the top and bottom vertical lines, and each of the fixed support shafts arranged close to the both fixed support axes. A fixing surface, upper and lower swing arms swinging around the respective fixed support shafts, a pressing rod attached between the ends of the upper and lower swing arms, and a pressing rod for pressing the test piece; Is composed of an elastic body that is interposed between the rocking arm and the fixed contact surface and is compressed when the rocking arm is pressed against the test piece by rocking the rocking arm, and the compressed elastic body is restored by its elasticity. and characterized in that the by pressing lever is disengaged from the test strip. Therefore, the pressing rod is automatically retracted from the test piece by a small distance by the retracting mechanism.

Furthermore, in order to solve the above-described problems, the material testing machine according to the present invention is provided with a pair of fixed support shafts erected at two points on the upper and lower sides on both sides of the test piece holding shelf, and swings on both sets of fixed support shafts The combination of the arm and the pressing rod can be arranged in the form of a door. In this way, the test pieces loaded and held by the two swing arms are reliably aligned.

  After pressing the pressing rod against the test piece, it is only necessary to release the hand from the pressing rod, and the distance between the pressing rod and the test piece is very small, and the amount of the gap is arranged close to each fixed spindle. It becomes constant for the time of each fixation, and the collapse of the piled test piece can also be prevented. Moreover, the elastic body is held integrally with the swing arm, and the pressing rod can be retracted with certainty.

  It is desirable to provide two pressing rods on the left and right. The reason is that the test piece has a certain length, and if it is one, only the center position of the test piece is pressed and positioning cannot be performed accurately. Moreover, the pressing rod is provided at the outer end of the swing arm that swings about the center of the fixed support shaft. It is desirable that two swing arms are supported on the upper and lower sides, and two on the left and right sides are provided symmetrically with respect to the center of the holding shelf, so that the pressing is reliably performed. In order for the elastic body to be always interposed between the fixed contact surface disposed in the vicinity of the fixed support shaft and the surface on the swing arm side, it is desirable to accommodate the elastic body in the case. It is desirable to make a contact with Therefore, a material testing machine having these configurations is the best mode for the present invention.

Examples of the material testing machine provided by the present invention will be described below with reference to FIGS.
The material testing machine according to the present invention includes a testing machine main body TM for performing a tensile test and the like, as shown in FIG. 3, and loading and holding the test pieces 5 one by one on the testing machine main body TM side by side. It comprises a holding shelf device HD for the test piece 5 that operates so as to be transported, and a drive device TD that drives the holding shelf device HD up and down. And it is comprised so that the load collapse of the laminated | stacked test piece 5 may not arise with respect to the transfer of the held test piece 5 while holding the test piece 5 appropriately.

  The holding shelf 4 is used for stacking and holding the test pieces 5, is L-shaped integrally with the back plate 4 </ b> P, and is joined to the support plate 3 so as to be movable up and down. The support plate 3 is fixedly installed on the gantry 2 above the machine base 1 of the test machine main body TM.

  Regarding the transfer of the test piece 5 to the test machine main body TM side, the holding shelf 4 is installed to be movable up and down as described above by the drive of the driving device TD, and the test piece 5 reaches the position of the suction pad 13 waiting on the upper side. Is displaced upward. Then, the suction pad 13 that has sucked the test piece 5 moves to the test machine main body TM, and is configured to deliver the test piece 5 to a chuck portion (not shown) in the test machine main body TM. Although it reciprocates between the test machine main body TM and its mechanism is not directly related to the present invention, its description is omitted.

  As described above, the material testing machine provided by the present invention presses the test piece 5 against the back plate 4P of the holding shelf 4 in order to prevent the collapsing of the test piece 5 during alignment and transfer of the loaded test pieces 5. The pressing door device SD will be described below with a test piece pressing mechanism.

  As shown in FIG. 3, the pressing door device SD is installed on the front side of the holding shelf device HD for loading and holding the test piece 5 on the machine base 1. Moreover, although the pressing door device SD opens and closes like a door, it does not have a plate-like door, but mainly presses 10 on both sides for pressing the test piece 5 and each pressing rod 10 freely swings. The upper swing arm 9U to be moved and the lower swing arm 9D are mainly combined.

  On the other hand, FIG. 2 and FIG. 4 show the configuration of a specific portion in the lower part of the holding shelf device HD. This is because the pressing rods 10 on both sides pressing the test piece 5 and the respective pressing rods 10 can be freely set. The state where the upper swing arm 9U to be swung and the lower swing arm 9D are pivotally supported is shown. This structure constitutes the assembly of the pressing rods 10 on both sides.

  In other words, according to this configuration, the upper swing arm 9U and the lower swing arm 9D, which form the main body, are erected between the machine base 1 and the upper support frame 6 as shown in FIG. It is supported by fixed support shafts 7 </ b> S that are erected on the upper part and the lower part of the support column 11. As shown in FIG. 4, the fixed support shaft 7 </ b> S is erected on the upper surface of the support base 7 attached in the vicinity of the upper end portion and the lower end portion of the column 11.

  Specifically, as shown in FIG. 4, a fixed support shaft 7S is erected at the lower end portion of the column 11, but this configuration is also supported at the upper end portion of the column 11 as shown in FIG. A stand 7 is erected and a fixed support shaft 7S is erected similarly. The base ends of the swing arm 9U and the swing arm 9D are opposed to and supported by the upper and lower fixed support shafts 7S. That is, a through hole 9H is formed in the base end of each of the swing arm 9U and the swing arm 9D, and the fixed support shaft 7S is inserted into and engaged with the through hole 9H.

  FIG. 4 shows only the lower left part of the column 11, but as shown in FIG. 3, the same structure is also installed in the lower right part of the column 11, and the swing arm 9U and the swing arm 9D The shaft 11 is pivotally supported in the same manner above and below the column 11. In this way, the two swing arms 9U on the upper side and the two swing arms 9D on the lower side can swing, and two are provided on both sides corresponding to both ends of the test piece 5 by the pressing door device SD described above. The pressing rod 10 is pressed against the test piece 5 so that the alignment of the test piece 5 is maintained.

The present invention relates to the pressing door device SD for the test piece described above, and the pressed pressing bar is used as the test piece for both of the pressing bars 10 having the function of positioning and preventing the collapse of the test piece 5 loaded on the holding shelf 4. 5 is provided with a retracting mechanism for retracting a minute distance, and the present invention is characterized by a pressing door device SD for a test piece. Hereinafter, the structure which becomes the principal part of this pressing door apparatus SD is demonstrated according to FIG. 1 and FIG.
FIG. 1 shows the entire configuration including the positional relationship between the swing arm 9U (9D) on the left side and the test piece 5. FIG. 9 is a top view showing a support mechanism for an upper swing arm 9U and a lower swing arm 9D with respect to the fixed support shaft 7S in the lower direction of the column 11, and the fixed support shaft 7S is mounted on the support base 7. . The test piece 5 is loaded in contact with the back plate 4P of the holding shelf 4.

  In the following, the lower swing arm 9D will be described as a representative. The base end of the swing arm 9D is pivotally supported with respect to the fixed support shaft 7S through a through hole 9H that is drilled. As shown in FIGS. 1 and 2, the base end of the swing arm 9D is An elastic body (spring) 12 is interposed between the case 8 and the swing arm 9D. Further, the front surface of the support column is set as a fixed contact surface F as shown in FIG.

  The elastic body (spring) 12 is attached to the inner surface of the case 8. In this case, one end of the elastic body 12 is fixed to the inner surface of the case 8 by a fixing pin 12S, and the other end is bent and released. Accordingly, when the case 8 is fixed and the swing arm 9D swings around the fixed support shaft 7S, the elastic body 12 is compressed. FIG. 2 is a diagram showing this state from the outside, and parts that are not visible from the outside are shown by broken lines.

  Since the present invention has the above-described configuration, the case 8 does not follow the swing if the swing range of the swing arm 9D is within a certain angle. The case 8 swings in synchronism with the swing arm 9 </ b> D if the swing angle is greater than the contact angle with the frame on the opening side of 8. The case 8 is also pivotally supported by the fixed support shaft 7S and is disposed so as to be rotatable and in contact with the support column. In addition, the front surface of the support column 11 is set as the fixed contact surface F. Therefore, as shown in FIG. 2, when the case 8 is pivotally supported by the fixed support shaft 7 </ b> S and the outer surface of the case 8 comes into contact with the fixed contact surface F on the front surface of the column 11, the rotation is stopped.

  Therefore, when the swing arm 9D is swung largely on the side opposite to the holding shelf in order to load and align the test pieces 5, the case 8 also rotates around the fixed support shaft 7S with respect to the support base 7, It will leave | separate from the fixation present F of the support | pillar 11. When the pressing rod 10 is pressed against the test piece 5, the case 8 also rotates in synchronization with the swing of the swing arm 9D, and the case 8 is fixed to the fixing surface F of the column 11 as shown in FIG. Abut. Then, when the case 8 is fixed but the swing arm 9D swings, the elastic body 12 is compressed between the inner surface of the case 8 and the swing arm 9D.

  When the operator finishes the pressing operation with the pressing rod 10 and releases the swing arm 9D, the elastic force of the elastic body 12 acts on the swing arm 9D, which is opposite to the pressing direction, that is, on the opposite side of the test piece 5. Biased in the direction. As a result, as shown in FIG. 1, the pressing rod 10 is separated from the test piece 5 by a minute distance (1 mm to 2 mm). As a result, the alignment of the test piece 5 is maintained, and the pressing rod 10 is not in contact with the test piece 5, so that no load collapse occurs during the transfer.

  Although the present invention has been described in detail above, it is not limited to the above and illustrated examples, but includes various modified embodiments. For example, in the illustrated example, the elastic body 12 is interposed in the case insertion method, but it is not necessarily required to be housed in the case 8, and the elastic body 12 is provided between the swing arm 9 </ b> D and the fixed contact surface F of the column 11. May be interposed. Furthermore, in the material testing machine according to the present invention, in order to solve the above-described problem, the elastic body to be compressed is housed in a case that is supported by a fixed pin and surrounds the end of the swing arm. Therefore, there is less risk of the elastic body colliding with other parts and leaving or loss, and compression is ensured.

  The elastic body 12 is interposed, that is, attached to the inner surface of the case 8 in the case 8, as shown in the drawing, fixed to the swing arm 9D side, and fixed to the fixing surface F side of the column. There is a method of holding, but further, a method of holding neither, for example, a method of implanting a holding arm from the machine base 1 or the gantry 2 and fixing it to the holding arm instead of the support column or the swing arm 9D side. Thus, various methods can be adopted. Further, the shape and material of the elastic body 12 are not limited to the illustrated examples. However, the elastic body in the illustrated example can be reduced in size and cost. The shape may be a coil type. It can also be made of a rubber material.

  Although the number of the pressing rods 10 is two in the illustrated example, it can be a single rod having a certain width. The method of moving the suction pad 13 up and down as to the method of sequentially moving the pressed test pieces 5 upward is shown, but there is also a method using a gripping device in addition to using the suction pad 13, and these configurations are also shown in FIG. It is not limited to the examples shown.

It is a figure which shows the structure and operation | movement by this invention. It is a figure which shows the principal part of the structure in this invention. 1 is a perspective view of an entire material testing machine according to the present invention. It is a figure which shows the structure which supports a rocking | fluctuating arm. It is a figure which shows perspectively the support structure of a rocking | fluctuating arm by the structure in the past. It is a figure which shows the support and the action | operation of the rocking | fluctuating arm in the past.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine stand 2 Base 3 Support plate 4 Holding shelf 4P Back plate 5 Test piece 6 Support frame 7 Support stand 7S Fixed support shaft 8 Case 9U Swing arm 9D Swing arm 9H Through hole 10 Pressing rod 11 Strut 12 Elastic body 12S Fixed Pin 13 Suction pad F Fixing time HD Holding shelf device SD Pressing door device TM Tester body TD Drive device

Claims (2)

In a material testing machine provided with a test piece holding shelf for loading and holding a large number of test pieces, a pressing rod having a function of positioning and preventing collapse of the test piece loaded on the holding shelf, and the pressed pressing rod as a test piece And a retraction mechanism for retreating a small distance from each of the fixed support shafts erected at two points on the top and bottom vertical lines at the fixed portion on the base of the material testing machine, and both the upper and lower fixed supports. Attached between the respective fixed faces arranged close to the respective shafts, the respective upper and lower swing arms swinging around the respective fixed support shafts, and the respective end portions of the upper and lower swing arms. A pressing rod that presses the test piece, and an elastic body that is interposed between the swing arm and the fixed surface when the pressing rod is pressed against the test piece by swinging the swing arm and compressed. Materials tester compressed elastic body, characterized in that disengaging the rod pressing restored by its elasticity from the specimen. A pair of fixed support shafts erected at the two upper and lower points are provided on both sides of the holding shelf for the test piece, and a combination of a swing arm and a pressing rod is provided in the form of a door on both sets of fixed support shafts. The material testing machine according to claim 1.

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