JPH0961323A - Material tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an indicator, make it lightweight, and move and install it at an easily observable place by installing the indicator in a portable vertical housing, and forming the indicator with a liquid crystal display. SOLUTION: A tensile load is applied to a test piece TP, the value of the load is detected by a pressure sensor 5 as the back pressure of a hydraulic cylinder 3, and the load detection signal is guided to a force measuring unit 13 via a lead wire 15. An indicator DP is installed in a portable vertical housing 17 having a carrying handhold, a display mechanism is formed with a liquid crystal display, a personal computer making calculations for display is stored below a display screen 18, and a scanning switch 19 is provided. The length of the lead wire 15 guiding the load detection signal from the force measuring unit 13 is set to a necessary length in consideration of the position of the place where the indicator DP is installed. A characteristic curve is displayed in a graph on the display screen 18 based on the test data of a tensile test.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material testing machine provided with a display device for displaying a test measurement value on a liquid crystal display device by carrying out a test by applying a tensile load or the like to a test piece of various materials. .

[0002]

2. Description of the Related Art Conventionally, as a display device for displaying a test measurement value of a material testing machine of this kind, a display device for displaying a pointer on a so-called load meter or a CRT for a control device is often used. ing. Recently, it has been proposed to configure the display unit with a liquid crystal display to reduce the weight. For example, Japanese Patent Application Laid-Open No. 5-87595 "Measurement value display device in material testing machine" discloses a material testing machine equipped with a liquid crystal display. In this case, the load detection signal from the load detector is arithmetically processed by adding test conditions and data processing conditions, and is displayed on the display, but is recorded as measurement data by a graphic printer or the like. ing.

[0003]

By the way, the above-mentioned CRT (cathode ray tube) display device is large and heavy as a display device, so that it is usually fixedly installed on a power meter. However, the proposed liquid crystal display is also a type that is fixedly installed on the power meter. Furthermore, a method has been proposed in which the liquid crystal display is fixedly installed or suspended on the machine frame of the tester. Therefore, although the weight of the display device is being reduced in this way, when the test operator observes the test measurement data on the display device in these devices, whether the operator moves to the fixed position. There are problems such as having to face the direction of the position. There are some systems where the liquid crystal display is fixedly erected on the frame of the tester and its orientation can be changed, but since its mounting location is fixed, there are limits to changing the orientation, which may be inconvenient for observation. The present invention intends to provide a material testing machine which solves such problems.

[0004]

SUMMARY OF THE INVENTION A material testing machine provided by the present invention comprises a testing machine body having a load detector for testing a material, and an arithmetic processing device for arithmetically processing a detection signal output from the detector. And a display for displaying the measurement data of the result of the arithmetic processing by this arithmetic processing device,
This display is characterized in that it is installed in a portable vertical housing and is composed of a liquid crystal display.

Since the display device is a portable vertical casing and is composed of a liquid crystal display, it can be easily moved to a table or an installation table that is easy to observe and can be vertically placed or placed there, and Can be erected or hung on the vertical frame or wall of the tester.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an entire embodiment in which the present invention is applied to a hydraulic material testing machine UT, a so-called universal testing machine, in which the testing machine main body has a load mechanism vertically mounted on a base 1. Has been done. That is, the load hydraulic cylinder 3 is mounted on the base 1.
And a ram 4 is slidably inserted into the hydraulic cylinder 3. The machine base 2 is fixedly installed on the upper end of the ram 4. Therefore, the machine base 2 moves up and down by the vertical movement of the ram 4 by hydraulic pressure. Reference numeral 7 is a load connecting rod which is erected on the upper surface of the machine base 2. A yoke 10 is installed between the upper ends of the load connecting rods 10. On the other hand, two screw rods 8 are erected on the base 1 through the through holes of the machine base 2. Both the screw rods 8 are rotationally driven by the rotational drive mechanism 6. A crosshead 9 is erected on the two screw rods 8, and the crosshead 9 is moved up and down by the rotation of both screw rods 8 and set at a predetermined position where the test piece TP is desired to be gripped. This is performed to set the size and test position of the test piece TP. Reference numerals 11 and 12 denote gripping tools for fixing and gripping the test piece TP to the crosshead 9 and the yoke 10.

On the other hand, reference numeral 13 is a force gauge (control device), in which a hydraulic pressure generating device (not shown) is installed. The hydraulic pressure from this hydraulic pressure generator is pipe 1
It is introduced into the hydraulic cylinder 3 via 4. When the hydraulic pressure is introduced into the hydraulic cylinder 3, the ram 4 moves upward and the load connecting rod 7 raises the yoke 10. Then, since the crosshead 9 is fixed, a tensile load is applied to the test piece TP. The value of this load is detected by the pressure sensor 5 as the back pressure of the hydraulic cylinder 3, and this load detection signal is guided to the force gauge 13 side via the lead wire 15. The power meter 13 is provided with an operation switch 13S for performing test operation and control.

The load detection signal is processed by a processing device (a microcomputer or a personal computer, which is not shown in the drawing) installed in the force gauge 13. This computing device is a power meter 1
Not only 3 but also can be installed in the display. The result of the arithmetic processing performed by the arithmetic processing device is recorded by the printer 16 and displayed on the display.

The present invention provides a display DP for this test measurement value.
There is a feature in the configuration. That is, the display is a portable vertical type and is installed in the housing 17 that can be carried anywhere, and the display mechanism is composed of a liquid crystal display. Therefore, it is small and lightweight, and is extremely convenient to carry.

FIG. 1 shows a state in which the display device DP is vertically placed or placed on the upper surface of the force gauge 13. A personal computer that performs arithmetic processing for display is installed below the display surface 18, and 19 is a switch for the operation. Reference numeral 21 is a lead wire for guiding the load detection signal from the force gauge 13 to the display DP. The length of the lead wire 21 is set to a length necessary to enable it in consideration of the position where the display DP is placed. Display surface 1 in the illustrated example
In FIG. 8, a characteristic curve (displacement and load) based on the test data of the tensile test is displayed in a graph. 20 is a display DP
This is a handle attached to the upper end of the casing 17 for carrying the display device DP with one hand. This handle 2
0 is not limited to being attached to the upper end, but on both sides (sideways)
But often, no additional installation is necessary.

An opening / closing door 13D is installed on the front surface of the power meter 13, and when the door 13D is opened, a space for accommodating the display DP is provided. When the display DP is not used, the interior is closed. Is stored in. In this case, the lead wire 21 is also housed with both ends thereof removed from the force gauge 13 and the display DP.

FIG. 2 is a diagram showing an entire embodiment in which the present invention is applied to an electric measuring material testing machine ET. The basic construction of the testing machine body is that the testing machine columns 22 and 23 on both sides and two upper and lower test machines are provided. The cross heads 27 and 28 of FIG. Inside the tester columns 22 and 23 on both sides, screw rods are hung vertically that are rotated by a rotary drive mechanism installed in the lower crosshead 28. The upper crosshead 27 is screwed into these screw rods, and the upper crosshead 27 is configured to move forward and backward (moving up and down) relative to the lower crosshead 28 by the rotation of the screw rods. Therefore, the tension test of the test piece TP held between the two grippers 24 and 25 is performed by the rise of the upper crosshead 27. The load at this time is detected by the load cell 26, and the detection signal is guided to the control device (power meter) 13 side via the lead wire 15.

In the case of this embodiment also, the feature of the invention resides in the display, but in FIG. 2, the same symbols as those in FIG.
This is an instrument having the same parts or functions as in FIG. 1, and the configuration and operation thereof are also as described above, so a detailed description is omitted. However, the display device DP is in a state of being vertically placed on or placed on the upper surface of the work desk T, and this point is different. When the work related to the test work is being carried out on the work desk, the work efficiency is improved by placing the display device DP on the desk T.

FIG. 3 is a diagram showing an entire embodiment in which the present invention is carried out on the same material testing machine as that shown in FIG. 3 is different from FIG. 2 in that the display device DP is suspended from the vertical frame of the tester. Specifically, the grip K of the indicator DP is attached to the hook K protruding from the middle of the tester column 23 of the material testing machine.
0K is hooked and suspended. In the case of this suspension system, even if there is no work desk as shown in FIG. 2 and the space on the control device 13 is small and objects cannot be placed so much,
The display device DP can be placed in the vicinity of the tester, and it becomes possible to observe the situation during the test.

FIG. 4 is a diagram showing an entire embodiment in which the present invention is carried out in the same material testing machine as in FIG. 3 described above. 4 is different from FIG. 3 in that the display DP and the control device 13 are electrically connected not by wire but by wireless. That is, specifically, the signal transmitter 29 is attached to the control device 13, and the signal receiver 30 is attached to the display device DP.

In this case, there are the following combinations as the configuration of the control device 13 side and the display DP side. One is a display DP in which a microcomputer or a personal computer as an arithmetic processing device is installed on the control device 13 side.
In this case, a display drive circuit is installed. In this case, the signal transmitter 29 becomes the output end of the arithmetic processing device and the signal receiver 30 becomes the input end of the display drive circuit. Two are the case where a microcomputer as an arithmetic processing device is installed on the control device 13 side, and a personal computer is installed on the display DP, and in this case, the signal transmitter 29 is an arithmetic processing device (microcomputer). It becomes the output end,
The signal receiver 30 serves as an input terminal (interface) of the personal computer.

Therefore, the lead wire is unnecessary and the display DP
Can be moved anywhere and placed, and the risk of an operator hooking a lead wire and causing an accident is eliminated. Of course, in the case of this wireless type, the display DP as shown in FIG. 4 is not limited to the hanging type, but a vertical or stationary type display as shown in FIGS. 1 and 2 may be used. it can.

FIG. 5 is an enlarged perspective view of the display device DP. A liquid crystal display surface EK is installed on the front surface, and an operation switch 19 is also installed on the liquid crystal panel EP. The so-called operation switch 19 is the same as the seat switch displayed on the liquid crystal surface. Of course, this operation switch 19
May be of push-button type or may not be installed.

FIG. 6 shows the three types A to C of the display devices DP from the side, and FIG. 6 shows the switch panel S.
The P is installed below and the liquid crystal panel EK is installed above. FIG. B shows the display of FIG. FIG. C shows an example in which a personal computer PC is installed below the display device DP.

FIG. 7 shows two liquid crystal panels EK1 and E on the front surface.
K2 shows the display DP arranged vertically. The panel EK1 is a liquid crystal display that displays test data in a pointer format, and the panel EK2 is a liquid crystal display that displays test data in a graph format.

The present invention can be summarized as follows.

Appendix 1 A tester main body equipped with a load detector for testing a material, an arithmetic processing device for arithmetically processing a detection signal output from the detector, and a measurement of a result of arithmetic processing by the arithmetic processing device. A material testing machine comprising a display device for displaying data, the display device being installed in a portable vertical casing and composed of a liquid crystal display.

Appendix 2 A tester main body equipped with a load detector for testing a material, an arithmetic processing device for arithmetically processing a detection signal output from the detector, and measurement of a result of arithmetic processing by the arithmetic processing device. A material testing machine, comprising a display device for displaying data, the display device being installed in a vertical or portable vertical housing that can be placed and made up of a liquid crystal display.

Appendix 3 A tester main body equipped with a load detector for testing a material, an arithmetic processing device for arithmetically processing a detection signal output from the detector, and a measurement of a result of arithmetic processing by the arithmetic processing device. A material test consisting of a display unit that displays data, and this display unit was installed in a vertical frame that can be hung or suspended on a vertical frame or wall surface, and was composed of a liquid crystal display. Machine.

Appendix 4 A tester main body equipped with a load detector for testing a material, an arithmetic processing device for arithmetically processing a detection signal output from the detector, and measurement of a result of arithmetic processing by the arithmetic processing device. It consists of a display for displaying data. This display is installed in a portable vertical casing and consists of a liquid crystal display, and signals are exchanged between the arithmetic processing unit and the display by wireless. Material testing machine characterized by.

[0026]

As described above, in the material testing machine provided by the present invention, since the display is installed in the portable vertical casing and is composed of the liquid crystal display, it is possible to reduce the size and weight of the display. The weight of the entire test equipment can be reduced. Further, there is an advantage that the display device can be moved and installed in a place where it is easy to observe, and the observation of the test situation can be performed smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a material testing machine according to the present invention.

FIG. 2 is a perspective view showing the overall configuration of a material testing machine according to the present invention.

FIG. 3 is a perspective view showing an overall configuration of a material testing machine according to the present invention.

FIG. 4 is a perspective view showing an overall configuration of a material testing machine according to the present invention.

FIG. 5 is a perspective view showing a configuration of a display device according to the present invention.

FIG. 6 is a perspective view showing a configuration of a display device according to the present invention.

FIG. 7 is a perspective view showing a configuration of a display device according to the present invention.

[Explanation of symbols]

 UT, ET ... Tester main body TP ... Test piece DP ... Display (liquid crystal display) EP ... Liquid crystal panel PC ... Personal computer (arithmetic processing device) 1 ... Base 2 ... Machine stand 3 ... Hydraulic cylinder 4 ... Ram 5 ... Pressure Sensor 11, 12, 24, 25 ... Grasping tool 13 ... Power meter (control device) 17 ... Display housing 15, 21 ... Lead wire 26 ... Load cell 29 ... Signal transmitter 30 ... Signal receiver

Claims (1)

[Claims] 1. A tester main body equipped with a load detector for testing a material, an arithmetic processing device for arithmetically processing a detection signal output from the detector, and measurement of a result of arithmetic processing by the arithmetic processing device. A material testing machine comprising a display device for displaying data, the display device being installed in a portable vertical casing and composed of a liquid crystal display.