JP2819094B2 - Device for correcting position of test piece in tensile tester and tensile tester equipped with this position corrector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a continuous or semi-automatic method for measuring the tensile strength of test pieces mainly made of rubber and plastic materials of various standards, and of test pieces whose shape has been varied through aging tests and oil swelling tests. Provided is a device for correcting the position of a test piece in a tensile tester for performing accurate and accurate measurement, and a tensile tester provided with the position corrector.

[0002]

2. Description of the Related Art In a conventional tensile tester, a large number of test piece cases each containing one or a plurality of test pieces having the same shape are prepared, stacked on a storage cassette, and the test pieces stored in the storage cassette are prepared. The test piece was transferred from the inside of the case to a tension clamp by a test piece transfer device and clamped. In addition, the test piece is securely placed on an accurate position on a predetermined table (not shown) of the test piece transfer device, and is transferred from that position to a tension clamp by the test piece transfer device and clamped.

[0003]

In a conventional tensile tester, with the automation or semi-automated operation, several hundred test pieces are continuously tested by setting these test pieces in a storage cassette in advance. The method of doing has become widespread. Then, as an absolute condition of this type of method, it is necessary to adjust the storage cassette of the test piece to the shape and size of the test piece. Incidentally, this reason was an indispensable factor in positioning for reliably bringing the test piece to the tension clamp. Therefore, when testing the deformed test piece after the swelling test by immersing the rubber test piece in gasoline, oil, etc.
There is a problem that many test piece cases and storage cassettes corresponding to test pieces of various standards and test pieces after deformation have to be prepared. Even if the size of the case laminated in the storage cassette is made larger than the test piece, if the case is inserted into this case regardless of the size of the test piece, as shown in FIG. Is deviated to one of the vertical and horizontal center lines, so that the suction holes of the vacuum type upper and lower suction cups for feeding and transporting to the upper and lower clamp positions come off the test piece, and the complete suction There was a problem that it became impossible. Further, a single storage cassette can test only one type of test piece, and a small number of various types of test pieces cannot be mixedly set in the same storage cassette. Furthermore, since there are many types of standard products that are classified by number according to their outer diameter and shape, there is a need for a test piece position correction device that can also determine the standard number of test samples. there were.

In order to solve the above-mentioned problems and problems, the present invention reliably moves to a tension clamp with respect to the difference in dimensions between test specimens and the supply and transport of a deformed sample test specimen due to a swelling test. In order to be able to clamp, to provide a position correcting device that corrects the position of a test piece to a proper position even if the test piece is not in a proper position, and to provide a tensile tester equipped with this position correcting device. Aim.

[0005]

In order to achieve the above object, the test piece position correcting apparatus according to the present invention is provided with a horizontal rotating mechanism and a horizontal moving mechanism for supporting the test piece mounting table, and a test piece mounting table. A monitor mechanism is provided above, and a signal output unit relating to the position of the test piece on the test piece mounting table observed by the monitor mechanism is connected to the control unit of the horizontal rotation mechanism and the horizontal movement mechanism, and the monitor mechanism is mounted on the test piece mounting table. It is characterized in that it is configured to correct the position of the test piece. The upper surface of the test piece mounting table is color-coded. The monitor mechanism includes a monitor camera, an arithmetic mechanism for processing a pixel signal relating to the position and shape of the test piece on the test piece mounting table observed by the monitor camera, and an output unit for this signal. It is characterized by.

A tensile tester provided with a test piece position correcting apparatus according to the present invention is a test piece mounting table for receiving test pieces one by one by a transfer device from a storage cassette in which a large number of test piece cases containing test pieces are stacked and stored. A tensile tester provided with a test piece transfer device that feeds a test piece one by one from the test piece mounting table to a tension clamp, wherein the test piece mounting table is moved horizontally with a horizontal rotation mechanism. Supported by a moving mechanism,
A monitor mechanism is provided above the test piece mounting table, and the signal output section relating to the position of the test piece on the test piece mounting table observed by the monitor mechanism is connected to the control section of the horizontal rotation mechanism and the horizontal movement mechanism, and the test piece is connected. It is characterized in that the position of the test piece on the mounting table is corrected. The upper surface of the test piece mounting table is color-coded, and a color sensor is provided in the test piece transport device of the tensile tester. With the tension clamp and the test piece transfer device equipped with a control mechanism,
The control mechanism is connected to an output section for outputting a signal relating to the shape of the test piece on the test piece mounting table observed by the monitor mechanism.

[0007]

The test piece position correcting device in the tensile tester of the present invention mounts the test piece on the test piece mounting table, and provides a horizontal rotating mechanism and a horizontal moving mechanism for supporting the test piece mounting table, A monitor mechanism is provided above, and a signal output unit relating to the position of the test piece on the test piece mounting table observed by the monitor mechanism is connected to the control unit of the horizontal rotation mechanism and the horizontal movement mechanism, and the monitor mechanism is mounted on the test piece mounting table. Since the configuration is such that the position of the test piece is corrected, the position of the test piece on the test piece mounting table is corrected and positioned at a fixed position. Further, the outer diameter and shape of the test piece can be determined by the monitor mechanism. The tensile tester equipped with the test piece position correcting device of the present invention transfers the test piece whose position has been corrected by the above-described position correcting device to a tension clamp at an appropriate position, and accurately applies the tension clamp according to the shape of the test piece. Can be clamped vertically.

[0008]

1 is a perspective view of a tensile tester according to the present invention, and FIG. 1 is a perspective view showing the arrangement of components of a tensile tester equipped with the position corrector for a test piece in the tensile tester. This tensile testing machine is provided with a storage cassette 1 in which a large number of test piece cases 3 each containing a test piece 2 are stacked and stored at the front central portion in the figure. The mounting table 14 is arranged parallel to the storage cassette 1. The test piece mounting table 14 supports a horizontal rotation mechanism indicated by reference numeral 15 in FIG. 3 and a horizontal movement mechanism indicated by reference numeral 17 so as to be horizontally rotatable and horizontally movable. A monitor mechanism 19 is provided directly above and above the test piece mounting table 14. Further, in the drawing, a tension clamp 32 provided with a control mechanism on the left side of the storage cassette 1.
A test piece transfer device 20 provided with a control mechanism is also provided alongside the test piece mounting table 14 behind the tension clamp 32. The signal output section of the monitor mechanism 19 is connected to the control section of the horizontal rotation mechanism 15 and the control section of the horizontal movement mechanism 17, and to the control mechanism of the test piece transfer device 20 and the control mechanism of the tension clamp 32. It is.

The test piece mounting table 14 is a substantially rectangular thick plate. The rectangular upper surface is bisected along the center line in the long side direction, one of which is a bright white surface 14A, and the other is a bright white surface 14A. It is color-coded in two colors as a dark black surface 14B (FIGS. 1, 3, and 10).

The test piece case 3 is rectangular and has a shallow bottom box shape, and the test piece 2 is housed in the test piece case 3. Here, the test piece cases 3 are all of the same shape, and the position of the test piece 2 in the test piece case 3 may be arbitrary. For example, as shown in FIG. 2, the test piece 2 may be located on the right side in the test piece case 3 and inclined downward to the right. The dotted line in the figure indicates a state where the center line in the long side direction of the test piece 2 coincides with the center line in the long side direction of the test piece case 3. The test pieces need not be of the same shape, and may have different shapes and lengths.

A lift 4 for pushing up the lowermost test piece case 3 is provided inside the storage cassette 1, and this lift 4 is connected to a motor M4 for vertical movement via a screw. In the vicinity of the center of the upper end of both sides of the storage cassette 1, an upper limiter light emitter 5A and an upper limiter light receiver 5B are provided so as to face each other so that the optical path thereof is directed to the uppermost test piece case 3.

A test piece transport device 6 is provided at a slight distance from the right side of the storage cassette 1 and the right side edge of the test piece mounting table 14. The transport device 6 has a pair of support plates 9, 9 opposed to each other, in which a longitudinal screw 9 A and a round bar-shaped guide shaft 9 are provided.
B is supported in parallel, and a motor M5 is directly connected to the screw 9A. Since the screw 9A has a circumferential surface at both ends, the screw 9A is rotatably supported by the support plates 9, 9. The screw 9 </ b> A and the guide shaft 9 </ b> B are screwed through the moving part 8 from the side surface thereof, and penetrate the moving part 8 so as to be able to advance and retreat and stop in the directions of arrows D and E. Here, the support plate 9
One of them is arranged on the extension of the front upper edge of the storage cassette 1, and the other support plate 9 is arranged on the extension of the long side on the rear side of the test piece mounting table 14. A rotating shaft 8A is provided on the upper surface of the moving unit 8, and the rotating shaft 8A is
And the transfer arm 7 is rotatable in the directions of arrows F and G. A color sensor 18 for judging the hue of the test piece 2 is provided downward on the transfer arm 7 of the transfer device 6, and two air cylinders 11 are provided so as to sandwich the color sensor 18 therebetween. The suction cups 12 and 12 are attached downward. The transfer arm 7 is located right above the storage cassette 1 at the start of the tensile test. Note that the transfer arm 7 has an arrow F
The receiving box 13 of the empty test piece case 3 is placed below the position where the test piece case 3 is rotated and stopped.

Here, the horizontal rotation mechanism 15 and the horizontal movement mechanism 17 will be described with reference to FIG. Horizontal rotation mechanism 1
5 arranges horizontally a thick rotating plate 15B having walls 15A, 15A standing upright on both side edges thereof,
The motor M1 is directly connected to the bottom of the rotating plate 15B. Similarly, the horizontal moving mechanism 17 is provided with the rotary plate 1.
5B, a rectangular intermediate base 15E is arranged.
A rectangular bottom of the support 16 is fixed to the upper surface of 5E, and the test piece mounting table 14 is formed on the support 16 and the following mechanism is added thereto. The above wall 15A,
Reference numeral 15A supports a long screw 15D and a round bar-shaped guide shaft 15C in parallel, and the motor M2 is directly connected to the screw 15D.
The guide shaft 15C and the screw 15D are screwed horizontally through the intermediate base 15E from the side surface thereof and pass therethrough. Also, since the screw 15D has both ends in a circumferential surface shape, the walls 15A, 15
A is rotatably supported by A. Walls 16A, 16A are provided on both sides of the support base 16 in the long side direction at right angles to the wall 15A of the turntable 15B, and the walls 16A, 16A support a longitudinal guide shaft 16B and a screw 16C in parallel. The motor M3 is directly connected to the screw 16C. This guide shaft 16B
And a screw 16C are screwed horizontally along the long side direction of the test piece mounting table 14 and penetrate therethrough. The screw 16C has both ends formed in a circumferential surface, and is rotatably supported by the walls 16A, 16A. Further, a control unit, which is an encoder, is attached to the motor M1 of the horizontal rotation mechanism 15 and the motors M2 and M3 of the horizontal movement mechanism 17, and the signal output unit of the monitor mechanism 19 is connected to the control unit.

With the above-described configuration, the horizontal rotation mechanism 15 and the horizontal movement mechanism 17 support the test piece mounting table 14 by connecting it horizontally and horizontally.

The monitor mechanism 19 processes a monitor camera 19A of a secondary charge-coupled device and a pixel signal relating to the position of the test piece 2 on the test piece mounting table 14 observed by the monitor camera 19A and its outer diameter and shape. Computing mechanism 1
9B and an output section for this signal. Masking is attached to the monitor camera 19A, and the field of view of the monitor camera 19A is a circular field of view S, and an effective field of view R is defined in the field of view S. Therefore, this section is partitioned into a substantially rectangular shape (FIGS. 4 and 5).

A tension clamp 32 is located on the left side of the above-mentioned storage cassette 1. The tension clamp 32 is formed by a pair of an upper fixed clamp 32A and a lower movable clamp 32B. Fixed clamp 32A
The small cylindrical protrusion on the upper surface of the movable clamp 32B is connected to the fixed crosshead of the tensile tester, and the small cylindrical protrusion on the lower surface of the movable clamp 32B is also connected to the movable crosshead of the tensile tester. The movable clamp 32B is configured to be able to advance and retreat in the vertical direction indicated by the arrow A in the figure with the fixed clamp 32A as a base end. Further, the fixed clamp 32A and the movable clamp 3
A control mechanism for controlling the vertical distance between 2B is provided, and the signal output section of the monitor mechanism 19 is connected to this control mechanism.

A test piece transfer device 20 is disposed on the left side of the test piece mounting table 14 and behind the tension clamp 32. The test piece transfer device 20 is a rotating unit using a rotary air cylinder as a power source. The pivot arm 21 is pivotally supported by a rotating arm 22 between a standing position in the figure and a horizontal position in contact with the upper surface of the test piece mounting table 14 in a rotating direction shown by an arrow B in the figure. It can be fixed in the upright position. A moving device 23 is fixed to the tip of the rotating arm 22. The moving device 23 supports a cylindrical air cylinder 25 so as to be able to advance and retreat in a horizontal direction indicated by an arrow C. Are in parallel with the air cylinder 25. A fixing plate 24 is provided between the air cylinder 25 and the tip of the guide shaft 26.
(FIG. 10), and the side surface of the test piece holding portion 27A is connected to the fixing plate 24 via a bolt-shaped shaft 24A. The test piece holding part 27A is a holding part that sucks and holds the test piece 2 in cooperation with the test piece holding part 27B connected vertically below the pair.

The test piece holding section 27A has a guide shaft 28
The test piece holding portion 27B is connected via a screw 29 with the test piece holding portion 27B so as to be able to advance and retreat in the vertical direction. The test piece holders 27A, 2
A control mechanism for controlling the vertical distance T between the 7Bs,
The signal output section of the monitor mechanism 19 is connected to this control mechanism. Further, a suction hole 30A is formed in the front of the test piece holding portion 27A, and the suction hole 3A is formed in the front of the test piece holding portion 27B.
0B is formed.

Further, the test piece holders 27A and 27B advance in the direction indicated by the arrow C 'by the air cylinder 25 and the guide shaft 26, and the opposing clamp surfaces 32 of the clamp 32A.
C and the opposite clamping surface 32 of the clamp 32B.
It is configured to reach a position sandwiched between the upper edge of D and the upper edge. Note that the test piece transfer device 20 is placed on the test piece mounting table 1 so that the direction of movement (arrow C) of the test piece holders 27A and 27B is perpendicular to the direction of rotation (arrow B) of the rotating arm 22.
4 and a tension test clamp 32.

In the figure, both ends of the fixed clamp 32A, both ends of the movable clamp 32B, the rotating part 21 of the test piece transfer device 20, the back surface of the test piece holding part 27A, the test piece holding part 27B
, The rear end of the air cylinder 25, the air cylinder 1
The small tubular protrusions on the sides of 1, 11 indicate the conduit connected to the pneumatic device.

In the test piece position correcting device and the tensile tester equipped with the position correcting device, the lift M is moved up by the motor M4 for moving the storage cassette 1 up and down in response to the clamp start signal. The motor M4 stops when the upper layer test piece case 3 cuts off the optical paths of the upper limiter light emitter 5A and the upper limiter light receiver 5B. At this time, the air cylinders 11 provided on the transfer arm 7 with the color sensor 18 interposed therebetween push down the suction cups 12 and 12 to come into contact with the test piece 2 and again suck the suction piece 12 on which the test piece 2 is adsorbed. Raise 12 to its original position. Next, the motor M5 of the transfer device 6 is operated, and the transfer arm 7 is moved to the base end 10.
At the same time, the movement of the moving section 8 in the direction of the arrow E causes the test piece 2 to reach the upper part of the test piece mounting table 14 and move the test piece 2
Place on top of In this example, since the test piece 2 has a dark black hue, the color sensor 18 determines this hue and applies it to the bright white surface 14A having a complementary color relationship with the hue of the test piece 2. I put it. Test piece 2
Is white, it will be placed on the black surface 14B. Subsequently, the transfer arm 7 returns to the position at the start of the test, rotates in the F direction, and removes the empty test piece case from the receiving box 1.
Discard it in 3 and return to the position at the start of the test again. Note that the above color tone is not limited to a combination of only black and white. It is possible to arbitrarily select a combination of color tones with clear contrast in brightness and color.

FIG. 4 shows an image obtained by observing the test piece mounting table 14 with the monitor camera 19A. A circular visual field S and a rectangular effective visual field R at the center of the visual field S can be seen. In this effective visual field R, the test piece 2 is shifted to the right and lowered to the right on the white surface 14A. It is located at an angle. The effective field of view R is indicated by a white outline section in the figure, and the symbol P is a vertical axis with the center O of the effective field R as the origin, and the horizontal axis Q is the center O and orthogonal to the vertical axis P. . FIG.
FIG. 7 is a reference diagram illustrating a state where an image of a test piece 2 is located horizontally in an effective visual field R and symmetrically positioned with respect to a horizontal axis Q. The basic function of the present invention is to correct the image position of the test piece placed on the test piece mounting table 14 to the fixed position by the test piece moving device as described above.

Here, detection of the image position in the effective visual field R will be described. As shown in FIG. 8, a rectangular effective visual field R
Is provided with a scanning line in a horizontal longitudinal direction in the figure, the number of the scanning lines is indicated by the arrow N _1, Yes also provided short sides parallel to a memory address in the vertical form for each scanning line,
The number of the memory address is indicated by the arrow N _2. Here, the memory address a slightly inner scan line adjacent to the long side of the upper and lower ends, a ₀ and b, and b ₀ as a reference point, the two ends of the scan line connecting the centers of the short sides memory address c, c ₀ Is set as a reference point. Key points of the test piece in the effective visual field R, the position of the key point can be displayed as a deviation from the above-mentioned reference point in the pixel signal, and the arithmetic mechanism 19B outputs the test piece from the signal output unit as a numerical signal. Is transmitted to the above-described control unit as a signal related to the position of.

FIG. 6 shows a test piece mounting table 14 in a black state.
7 shows a state immediately after being placed on the white surface 14A, and FIG. 7 shows a state in which the position of the test piece mounting table 14 has been corrected by the test piece position correcting device. 6 and 7, the visual field S
Shows only the portion of the white surface 14A. In FIG. 6, the test piece 2 is deviated to the right in the effective visual field R and inclined downward to the right. This state can be detected as a deviation from the reference point. That is, in the direction of the reference points a and a ₀ , the deviation a between the reference point a and the side edge of the left enlarged diameter portion of the test piece 2.
₁ and deviation a ₂ and deviation a ₃ between the side edges of the lower side edge of the same enlarged diameter portion as a reference point a _0, the pixel signal (Fig. 9
[A]). Similarly, deviations b ₁ and b ₂ between the side edges of the right-side enlarged portion and the reference points b and b _0, and deviations b ₃ between the side edges can be displayed as pixel signals (FIG. 9B).
In the directions of the reference points c and c ₀ , the deviations c ₁ and c _{2 from} the edges at both ends of the test piece ₂ and the deviation c ₃ between the edges can be displayed as pixel signals (FIG. 9C). The above deviation is transmitted as a numerical signal.

The black test piece 2 shown in FIG.
4 shows a state immediately after being placed on the white surface 14A. At this time, a signal regarding the position of the test piece 2 within the effective visual field R is
In deviation of the pixel _{signal, a 1 <a 2 ,b 1>} b 2, c 1> c
Located ₂ relations, as a numerical value signal the deviation regarding the position of the specimen 2, through the output portion of the signal, the horizontal rotation mechanism 1
5, the control unit of the motor M1, the motor M of the horizontal moving mechanism 17
2 to the control unit of the motor M3. Therefore,
First, the motor M1 of the horizontal rotation mechanism 15 rotates counterclockwise, and the position of the image of the test piece 2 within the effective field of view R becomes a ₁ =
b ₁ or motor M1 at it became a ₂ = b ₂ is stopped. Next, the motor M3 of the horizontal moving mechanism 17 rotates, the test piece mounting table 14 moves horizontally to the left, and stops when c ₁ = c ₂ . FIG. 7 shows the state at this time.

In the state shown in FIG. 7, the deviation of the test piece 2 toward the right side and the inclination toward the right side are corrected. But,
The center line in the longitudinal direction of the test piece 2 is eccentric above the horizontal axis Q of the effective visual field R. Therefore, the motors M2 and M3
Rotates, and stops when the center line coincides with the horizontal axis Q, that is, when a ₁ = a ₂ and b ₁ = b ₂ . Thereby, the position correction of the test piece 2 is completed.

The determination of the outer diameter and the shape of the test piece 2 will be described. As shown in FIG. 8, provided a number of scanning lines indicated by the arrow N ₁ in the field of view R in the horizontal direction and the vertical direction is provided with a number of memory address indicated by the arrow N _2. Therefore, when you exit the position correction of the deviation a ₃ shown in FIG. 9 can be set to indicate the width of the left expanded portion of the test piece 2. Similarly, the deviation b ₃ can be set to indicate the width of the right enlarged portion of the test piece 2, and the deviation c ₃ can be set to indicate the length of the test piece 2. With this setting, it is possible to correct the position of the test piece 2 and determine the plane outer diameter of the test piece 2. Further, the test piece 2 is determined by the other scan lines and the memory address.
Since the width can be measured along the long side direction, the planar shape of the test piece 2 can be determined. Thereby, for example, the standard number of the test piece 2 can be specified. And the structure which transmits the standard number, external dimension, and shape of the said test piece to the display and recording device provided in the tensile tester, for example can be made easily.
In addition, a configuration may be added in which a record on this shape is written together with the result of the tensile test.

Simultaneously with the completion of the correction of the position of the test piece 2, a signal relating to the outer diameter or shape of the length or width of the test piece 2 is output as a numerical signal via the signal output unit of the monitor mechanism 19 as a numerical signal. Is transmitted to the control mechanism of the vertical distance T between the parts 27A and 27B, and the suction hole 30
A and 30B are adjusted to a distance suitable for holding the test piece 2 by suction. Similarly, the distance between the fixed clamp 32A and the movement 32B is adjusted to a length suitable for the clamping surfaces 32C and 32D to clamp the enlarged-diameter portions on both sides of the test piece 2.

The rotating arm 22 of the test piece transfer device 20 is turned down from the standing position, and the test piece holding portions 27A, 27B
Touches the test piece 2 whose position has been corrected, and
A and 30B hold the test piece 2 by suction at an appropriate position (FIG. 10). In the drawing, imaginary lines indicate positions where the clamp surfaces 32C and 32D clamp the enlarged-diameter portions on both sides of the test piece 2.

Subsequently, the rotary arm 22 returns to the original standing position, and the test piece holders 27A and 27B advance in the direction of arrow C 'and stop at the position where they are sandwiched between the clamp surfaces 32C and 32D. Here, the enlarged diameter portions on both sides of the test piece 2 are clamped by the clamp surfaces 32C and 32D in the state shown in FIG. 10, and the thin rectangular central portion of the test piece 2 is vertically clamped. Thereby, the tensile test of the test piece 2 is performed accurately. The above process is performed automatically and continuously. FIG. 11 is a reference diagram illustrating a case where the position of the test piece 2 is not corrected. Since the test piece 2 is obliquely clamped by the clamp surfaces 32C and 32D, an accurate tensile test is impossible.

In the above description, the embodiment in which only one test piece is accommodated in the test piece case 3 has been described. However, instead of the test piece case 3 and the storage cassette 1, a plurality of test pieces are placed sideways. It is possible to easily provide a test piece case to be housed side by side and a storage cassette for storing the test piece case. In this case, the transfer arm is repeatedly moved forward and backward a plurality of times, and the test piece at the end of the test piece case is sequentially supplied to the test piece mounting table. Until this supply is over,
The lift of the storage cassette does not rise. Test specimens of the same standard can be tested efficiently.

Further, a tensile tester in which the above-described test piece supply mechanism is removed from the tensile tester provided with the test piece position correcting device can be easily configured. In this tensile tester, for example, a tester places a test piece on a test piece mounting table by a finger, and after placing the test piece, clamps the test piece accurately by the above-described process and removes the test piece from the outside. It can be a semi-automatic type that determines the diameter and shape. Further, by determining the shape of the test piece, it is possible to automate the printing of a marking line adapted to the shape.

[0033]

The apparatus for correcting the position of a test piece in the tensile tester according to the present invention mounts the test piece on a test piece mounting table, and provides a horizontal rotating mechanism and a horizontal moving mechanism for supporting the test piece mounting table, and a test piece mounting apparatus. A monitor mechanism is provided above the mounting table, and a signal output section relating to the position of the test piece on the test piece mounting table observed by the monitoring mechanism is connected to the control section of the horizontal rotation mechanism and the horizontal movement mechanism, and the test piece mounting table is provided. It is configured to correct the position of the upper test piece, so correct the position of the test piece on the test piece mounting table and place it in a fixed position, and accurately position the test piece vertically by a tension clamp. It has the effect that it can be clamped.

Since the upper surface of the test piece mounting table is color-coded, the monitor mechanism can easily and accurately detect the position of the test piece on the test piece mounting table and its outer diameter and shape. The monitor mechanism includes a monitor camera, an arithmetic mechanism for processing a pixel signal relating to the position of the test piece on the test piece mounting table observed by the monitor camera, its outer diameter, and shape, and an output unit for this signal. Because
There is an effect that a signal relating to the position of the test piece can be transmitted to the control unit of the horizontal rotation mechanism and the control unit of the horizontal movement mechanism via the signal output unit. Also, there is an effect that a signal relating to the outer diameter and shape of the test piece can be transmitted to the control mechanism between the tension clamp and the test piece holding unit.

In the tensile tester equipped with the test piece position correcting device of the present invention, a transfer device for moving forward and backward between the storage cassette and the test piece mounting table is installed, and a control mechanism is provided for the tensile clamp and the test piece transfer device. Since the control mechanism is connected to the signal output section of the monitor mechanism, the test piece can be continuously and accurately clamped vertically to the tension clamp, and also has the effect of automatically performing an accurate tensile test. In addition, the outer diameter of the test piece and the number of standard numbers can be determined and recorded.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a device for correcting the position of a test piece in a tensile tester of the present invention and components of the tensile tester provided with the position corrector.

FIG. 2 is a plan view showing a test piece case and positions of test pieces contained in the test piece case.

FIG. 3 is a perspective view showing a horizontal rotation mechanism and a horizontal movement mechanism.

FIG. 4 is a plan view showing a field of view of a monitor camera and a test piece on a test piece mounting table.

FIG. 5 is a reference view showing a field of view of a monitor camera and a test piece on a test piece mounting table.

FIG. 6 is an explanatory diagram showing a positional relationship between an effective visual field of a monitor camera and a test piece.

FIG. 7 is an explanatory view showing a position correction of a test piece.

FIG. 8 is an explanatory diagram showing reference points of an effective visual field of a monitor camera.

FIG. 9 is a front view of an image signal showing a position of the test piece on the test piece mounting table.

FIG. 10 is a plan view showing a test piece and a test piece transfer device at a fixed position on a test piece mounting table.

FIG. 11 is a reference view showing a test piece on a test piece mounting table and a main part of a test piece transfer device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage cassette 2 Test piece 3 Test piece case 6 Transfer device 7 Transfer arm 14 Test piece mounting table 14A White surface 14B Black surface 15 Horizontal rotation mechanism 17 Horizontal movement mechanism 19 Monitor mechanism 20 Test piece transfer device 32 Pull Clamp

Claims (7)

(57) [Claims] 1. A horizontal rotation mechanism and a horizontal movement mechanism for supporting a test piece mounting table of a tensile tester, a monitor mechanism is provided above the test piece mounting table, and the monitor mechanism monitors the test piece mounting table. An output unit for a signal relating to the position of the test piece is connected to the control unit of the horizontal rotation mechanism and the horizontal movement mechanism, so as to correct the position of the test piece on the test piece mounting table. Device for correcting the position of test pieces in tensile testing machines. 2. The apparatus according to claim 1, wherein an upper surface of the test piece mounting table is color-coded. 3. The monitor mechanism comprises: a monitor camera; an arithmetic mechanism for processing a pixel signal relating to the position and shape of the test piece on the test piece mounting table observed by the monitor camera; and an output unit for the signal. The position correcting device for a test piece of a tensile testing machine according to claim 1 or 2, wherein the device is configured. 4. A test piece mounting table for receiving test pieces one by one from a storage cassette for stacking and storing a large number of test piece cases accommodating test pieces is arranged, and one by one from the test piece mounting table. A tensile tester provided with a test piece transfer device for feeding a test piece to a tension clamp, wherein the test piece mounting table is supported by a horizontal rotating mechanism and a horizontal moving mechanism, and a monitor is provided above the test piece mounting table. A mechanism is installed, and the output part of the signal about the position of the test piece on the test piece mounting table observed by the monitor mechanism is connected to the control unit of the horizontal rotation mechanism and the horizontal movement mechanism, and the position of the test piece on the test piece mounting table A tensile tester equipped with a test piece position correcting device, wherein the tensile tester is configured to correct the tension. 5. A tensile tester equipped with a test piece position correcting device according to claim 4, wherein an upper surface of said test piece mounting table is color-coded, and a color sensor is provided in a test piece transporting device. . 6. The monitor mechanism comprises: a monitor camera; an arithmetic mechanism for processing a pixel signal relating to the position and shape of the test piece on the test piece mounting table observed by the monitor camera; and an output unit for the signal. A tensile tester provided with the test piece position correcting device according to claim 4 or 5, wherein the tensile tester is configured. 7. A control mechanism is provided in the tension clamp and the test piece transfer device, and the control mechanism is connected to an output part of a signal relating to the shape of the test piece on the test piece mounting table observed by the monitor mechanism. 7. A tensile tester provided with the test piece position correcting device according to claim 4, wherein