JPH0734356U - Universal test equipment - Google Patents

Abstract

(57) [Summary] [Purpose] A universal testing device capable of preventing the liquid contained in the liquid storage bag as a test body from scattering and leaking, or from scattering fragments when a plastic object as a test body breaks. provide. [Structure] The controller unit 1 is attached to the universal testing machine 2. This universal testing machine is provided with a cradle unit 11 on which a liquid storage bag as a test body is placed, and a slide table 9 having a pressure table 9a fixed to the lower surface. The cradle unit 11 has a hollow-cylindrical cradle main body 12 having a circular upper wall portion which serves as a test body mounting portion, the cradle main body is positioned, and the stored liquid is stored when the liquid storage bag is broken. A cover member 13 is provided for preventing scattering around.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a universal testing device, and more specifically, it is possible to prevent scattering or leakage of contained liquid by breaking a liquid containing bag as a test body, or scattering of fragments when a plastic object as a test body is broken. It relates to a universal testing device.

[0002]

[Prior art]

 Conventionally, as a universal testing apparatus, as disclosed in Japanese Patent Application Laid-Open No. 1-217239, a pressing means for pressing a test body, a driving means for driving the pressing means, and a test body by displacement by the pressing means. A universal testing apparatus is known which is provided with a sensor for detecting a load applied to a load, a control means for controlling the pressing means, and a display means for displaying the control content of the control means and the detection result of the sensor. . Further, in Japanese Patent Laid-Open No. 5-34215, a computer starts measurement based on a load applied by a manual universal testing machine, and measurement data from the measuring machine is collected for a predetermined load. Perform a predetermined calculation based on this sampled data, display various numerical values and relational charts on the display device based on this calculation information and store them in the storage device, and store them in the storage device of the load applied by the tester. When the ratio to the stored maximum load decreases, the measurement of one test piece is completed, and the series of processes described above is repeated until the predetermined number of test pieces is finished, and then the test result table and the relationship diagram are printed. Discloses an automatic measuring method using a manual universal testing machine that outputs.

[0003]

[Problems to be solved by the device]

 By the way, for example, in order to test the durability of a bag for containing a liquid, a bag-breaking test is performed in which a bag in a liquid-containing state is gradually increased in pressure and the pressure at which the bag breaks is detected. Here, if the bag containing the liquid is torn at a stretch, the contained liquid may scatter and stain the surroundings. Further, in a destructive test of a plastic object as a test body, there is a possibility that fragments at the time of destructing the plastic object may scatter and stain the surrounding area or hit the tester.

The present invention has been made in view of the above problems, and an object of the present invention is to disperse or leak the contained liquid by breaking the liquid containing bag as the test sample or to test the sample. It is an object of the present invention to provide a universal testing device capable of preventing the scattering of debris when the plastic material is broken.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises a mounting table on which a test body is mounted and a pressing member for pressing the test body on the mounting table, and by changing the distance between them. A universal testing device capable of pressing a test body is characterized in that a cover member is provided around the mounting table.

[0006]

【Example】

 An embodiment applied to a universal testing apparatus suitable for the bag breaking test of the liquid containing bag of the present invention will be described below. FIG. 1 is a front view of a universal test apparatus according to this embodiment, and FIG. 2 is a right side view thereof. This universal testing device is composed of a universal testing machine body 1 and a controller unit 2 provided on the side of the testing machine body. First, the universal testing machine body 1 will be described. The universal testing machine main body 1 has a housing 5 for housing the servomotor 3 and the pressure sensor 4 at the bottom, and two ball screws 6 and 7 extending vertically upward and a guide 5 are formed on the housing 5. A slide plate 9 is attached by the rods 8 and a cover portion 10 for locating the ball screws 6, 7 and the upper ends of the guide rods 8, 8 is formed on the upper portion. Then, the cradle unit 11 for mounting the test body is fixed on the upper wall of the housing portion 5. A pressure table 9a is fixed to the lower surface of the slide plate 9.

One of the lower ends of the ball screws is connected to the servo motor 3 via a reduction gear device. Further, both ball screws are connected at their lower end portions inside the accommodating portion 5 and at their upper end portions inside the cover portion 10 via connecting gears, respectively. The slide plate 9 is screwed onto these ball screws. As a result, the servo motor 3 operates, and the slide plate 9 moves up and down while being guided by the guide rod.

FIG. 3 is a partial cross-sectional perspective view of the cradle unit 11. The cradle unit 11 has a hollow cylindrical cradle main body 12 placed on the upper wall of the accommodating portion 5 and has a circular upper wall portion which serves as a test body mounting portion, and the cradle main body 12 A cover member 13 is provided for positioning and for preventing the contained liquid from scattering around when the liquid containing bag is broken. In the hollow inside of the cradle main body 12, a pressure receiving shaft 14 of a pressure sensor 4 which is housed in the housing 5 and is composed of, for example, a load cell, extends through a hole formed in an upper wall of the housing 5, The tip portion is in contact with the back surface of the upper wall of the cradle main body 12. Thereby, the load applied to the test body placed on the upper wall portion of the cradle main body 12 can be detected by the movement of the pressure receiving shaft 14 due to the deflection of the upper wall of the cradle main body 12. The cover member 13 includes an inner cylindrical portion 15 having a positioning hollow portion into which the cradle main body 12 is inserted, a hollow cylindrical outer cylindrical portion 16 surrounding the inner cylindrical portion 15, and the outer cylindrical portion. It has an annular connecting portion 17 that connects the inner surface of 16 and the outer surface of the inner cylindrical portion 15. Into the annular groove formed by the outer surface of the inner cylindrical portion 15, the upper surface of the annular connecting portion 17 and the outer surface of the outer cylindrical portion 16, the liquid containing bag as the test sample breaks and the leaked contained liquid flows in. Therefore, a drain hole is formed in the outer cylinder portion 16 so that the liquid that has flowed in can be discharged to the outside, and a drain port 18 is formed in the outer wall of the outer cylinder portion 16 corresponding to the hole. Further, in the illustrated example, the upper surface of the annular connecting portion 17 is formed so as to be lowered toward the drain port 18 so that the liquid in the groove can be smoothly discharged from the drain port 18 ( See FIG. 2). Incidentally, a drain pipe (not shown) is usually connected to the drain port 18 for use. A link-shaped seal member 19 is attached to an inner surface portion of the inner tubular portion 15 that faces the peripheral surface of the cradle body 12. A ring-shaped lip 20 having a free end extending above the connecting portion is attached to the upper edge of the outer tubular portion 16. The lip 20 is formed of a flexible material, preferably an elastic material (for example, rubber material).

FIG. 4 is an explanatory view of a state in which pressurization is started on the liquid containing bag A which is the test body. As can be seen from this figure, the pressure table 9a on the lower surface of the slide plate 9 has a circular recess formed on the lower surface, and the bottom surface of the recess and the upper surface of the upper wall of the pedestal body 12 are joined together. The test body is pressurized between them. The inner diameter L ₁ of the flange portion around the circular recess is set to be slightly larger than the outer diameter of the inner tubular portion 15 of the cover member 13, and the outer diameter L ₂ thereof is set to the outer tubular portion 16 of the cover member 13. It is set so that a large gap is not formed between the lip 20 and the lip 20 attached to the lip 20, and the lip 20 is preferably hermetically sealed. As a result, when the pressure is applied to the test body by approaching the cradle main body 12 of the pressure table 9a, the lip 20 of the cover member 13 is almost in contact with the outer periphery of the flange of the pressure table 9a, and the pressure is applied. The table 9a, the lip 20, the inner and outer cylindrical portions 16 of the cover member 13 and the connecting portion form a substantially sealed space, and even if the liquid storage bag A as a test sample is momentarily broken, the stored liquid is It does not scatter out of space. The height of the flange portion is set so that the lip 20 of the cover member 13 can be brought into close contact with the outer periphery of the flange portion of the pressure table 9a at the time when the pressurization of the specimen is started. It is desirable to set the thickness above the original thickness in the unpressurized state.

Next, the controller unit 2 will be described. As shown in FIG. 1, the controller unit 2 of the present embodiment has a button 21 for inputting numerical values for setting test conditions, a test selection button for selecting one of the bag breakage test, repetition test and constant pressure test. 22, 23, 24, a speed control photograph 25 for adjusting the ascending / descending speed of the slide plate 9 of the universal testing machine body 1, an emergency stop photograph 26, a test start button 27, a liquid crystal display 28, and a printer 29. There is. In addition to accepting signals from the pressure sensor 4 of the universal testing machine body 1 in addition to these buttons and shooting, the printer 29, the liquid crystal display 28, and the universal testing A control unit for controlling the servomotor 3 and the like of the machine body 1 is housed. FIG. 5 is a block diagram of this control unit. This control unit includes a servo motor drive circuit 30, an operation controller 31 to which the buttons and the photographing, and the liquid crystal display 28 are connected, the servo motor drive circuit 30 and the operation controller 31, and the pressure sensor. 4 and a main controller 32 connected to the printer 29. The main controller 32 is composed of a CPU having a RAM (random access memory) and a ROM (read only memory) attached thereto, and outputs a control signal to each part by executing a control program stored in the ROM. Capture detection signals. The three keys (F1, F2, F3) attached to the numerical value input key group in FIG. 1 are set using the numerical value input buttons and stored in the RAM or the like. This key is used when reading out and executing the set test conditions. Reference numeral 40 in FIG. 5 is an interface for connecting the main controller 32 to a personal computer (not shown).

The operation of the universal testing apparatus configured as above will be described. First, the test condition is input using the test selection key and the numerical value input key. FIG. 6A is an explanatory diagram showing an example of a time change of a load applied to a test body in a bag breaking test, FIG. 6B is a repeated test, and FIG. 6C is a constant pressure test.

In the bag-breaking test, for example, as shown in FIG. 6 (a), the slide plate 9 of the universal testing machine is lowered at a constant speed adjusted by the speed control camera 25 of the controller unit 2 to test the test piece. Is detected using the detection output of the pressure sensor 4 (for example, it is judged that the bag breakage has occurred due to a change in the detection weight from increase to decrease), and the bag breaks. This is a test that measures the peak value of the load immediately before, and pressurizes the test piece until the preset peak load is reached to determine whether bag breakage will occur.

In the former type of bag-breaking test, there are no specific test conditions other than the descending speed of the slide plate 9, so that, for example, after pressing the test selection key 22 for bag-breaking test, the enter key 33 is pressed. By pressing, the program is presumed to be regarded as the former type of bag-breaking test using the speed corresponding to the adjustment position of the speed control photograph 25 when the enter key 33 is pressed. In the latter bag breaking test, after pressing the test selection key 22 for the bag breaking test, the above peak load is input from the numerical value input keys, and the enter key 33 is pressed to press the enter key 33. It is programmed so that it is considered to be the latter type of bag breaking test using the speed corresponding to the adjusted position of the speed control photographing 25 at the time. Here, the input test conditions are stored in the RAM of the CPU together with the type of test.

The repeated test is performed at time t as shown in FIG. 6B, for example.₀~ T₁It is a test in which the pressurization pattern such as between is repeated. For example, in the illustrated example, pressurization start (t₀) To the first load value P₁Increase the pressure to the load value P₁When the pressure sensor 4 detects that the load value has reached₃Until the load value P₃After the pressure sensor 4 detects that₁Keep the load for only time,₁The load value becomes P as time passes₂Until the pressure reaches the load value P₂After the pressure sensor 4 detects that₂This load is maintained for a time, and this T₂The pressure is lowered until the load value becomes 0 at the passage of time, and when the load value becomes 0, one pattern ends here, and the second pressurization is continued with the same pattern. In the case of this example, following the pressing of the test selection key 23 for the repeated test, the load value P₁, Duration 0, load value P₃, Duration T₁, Load value P₂, Duration 0, load value P₃, Duration T ₂ , And so on, by alternately inputting the weight value and duration while pressing the enter key 33, and by inputting the number of repetitions as necessary, the adjustment position of the speed control camera 25 when the enter key 33 is pressed. It is programmed so that it is considered as a repeated test using a speed corresponding to. Here again, the input test conditions are stored in the RAM of the CPU together with the type of test.

In the constant pressure test, for example, as shown in FIG. 6C, a predetermined load P is continuously applied for a predetermined duration T or until bag breakage occurs, and the presence or absence of bag breakage during that time is measured. It is a test. In this test, after pressing the test selection key 24 for the constant pressure test, by inputting the overload value P and the duration T as necessary using the enter key 33, respectively, the enter key 33 is pressed. It is programmed to consider that the test is a constant pressure test using a speed corresponding to the adjusted position of the speed control photographing 25 of FIG. Here again, the input test conditions are stored in the RAM of the CPU together with the type of test.

After selecting the type of test and inputting the test conditions according to the procedure corresponding to the program as described above, the test body is placed on the cradle main body 12 of the universal tester and the test start is started. This test start instruction is given, for example, by pressing the start button after pressing the test selection key. As a result, the servo motor 3 is controlled while reading the detection output of the pressure sensor 4 based on the test conditions stored together with the type of test, and the test body is pressed to perform the test. Furthermore, the history of the load on the test body is displayed as a graph in real time based on the output of the pressure sensor 4 during the test. That is, the graphs themselves shown in FIGS. 6A to 6C are displayed. Then, for example, as described in the upper right area of FIG. 6A, in the bag breaking test, for example, the peak value P of the load immediately before the bag breaking and the time t from the start of pressurization until the bag breaking occurs. ₁ , the time t2 from the start of pressurization to the load value reaching 0 after the bag is broken is displayed on the liquid crystal display 28. On the actual screen of the liquid crystal display 28, as shown in FIG. 6A, it is desirable to display these calculated values together with the graph of the load history.

Then, in any of the tests, when it is found from the detection output of the pressure sensor 4 that the bag breakage of the test piece occurs during the test, the load peak value immediately before the bag breakage is displayed at that time. Then the test ends.

After the test is completed, the graph or the like displayed on the liquid crystal display 28 is automatically displayed on the printer 29, and the servo motor 3 is controlled so that the height of the test piece does not interfere with the mounting of the next test piece. Then, the slide plate 9 is raised. It should be noted that the test time can be shortened by raising the slide plate 9 after the end of this test and lowering the slide plate 9 after the start of the test until the pressurizing table 9a of the slide plate 9 comes into contact with the specimen and starts pressurization. For this reason, the speed control is performed at a relatively high speed, which is different from the speed setting by the shooting 25.

As described above, according to the present embodiment, in the cradle unit 11, the cover member 13 is provided around the cradle main body as the cradle on which the liquid storage bag A as the test body is mounted. It is possible to prevent the liquid that is scattered when the containing bag A is broken, from scattering to the outside of the cover member 13.

In addition, although the above-described embodiment has described the example in which the liquid containing bag A is used as the test body, the universal test apparatus of the present invention is also used as a universal test apparatus for the destructive test of the plastic material as the test body. Applicable.

[0021]

[Effect of device]

 According to the present invention, since the cover member is provided around the mounting table, it is possible to prevent scattering or leakage of the contained liquid due to the rupture of the liquid container as the test body or the breakage of the plastic object as the test body. It has an excellent effect of preventing scattering of fragments.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a universal testing device according to an embodiment.

FIG. 2 is a right side view of the test apparatus.

FIG. 3 is a partial cross-sectional perspective view of a part of the test apparatus.

FIG. 4 is an explanatory diagram of an operation of the test apparatus.

FIG. 5 is a block diagram of a control unit of the test apparatus.

FIG. 6A is an explanatory diagram of a bag breaking test using the same test apparatus. (B) is explanatory drawing of a repeated test using the same test apparatus. (C) is explanatory drawing of a constant pressure test using the same test device.

[Explanation of symbols]

 Universal testing machine 2 Controller unit 9 Slide plate 9a Pressurizing stand 11 Receiving stand unit 12 Receiving stand main body 13 Cover member 15 Inner tube part 16 Outer tube part 17 Annular connection part 18 Drain port 20 Lip

Claims (1)

[Scope of utility model registration request] 1. A universal testing apparatus comprising a mounting table for mounting a test body and a pressing member for pressing the test body on the mounting table, wherein the test body can be pressed by changing the distance between them. A universal testing device characterized in that a cover member is provided around the mounting table.