JP3131611U - Small material testing machine - Google Patents

Abstract

The present invention provides a material testing machine for testing the tensile strength and the like of a material, which is placed on a table in a laboratory or the like and tests the tensile strength of small and small pieces of material.
A testing machine includes a cylindrical body in which a semi-cylindrical portion 1H at an intermediate portion in a cylindrical body 1 having a predetermined height in the vertical direction is cut, and a frame body in which the remaining semi-cylindrical portion of the cylindrical body is formed as a hollow body. It is configured as a frame body, and includes test piece gripping chucks 6 and 7 respectively disposed above and below the cut-out space in the test machine frame body, and a chuck driving mechanism for moving the chuck up and down. Specifically, it becomes possible to secure a test space by excising the semi-cylindrical part, and by making the remaining semi-cylindrical part by excision of the semi-cylindrical part a hollow body, a test load mechanism, that is, a screw rod and a nut is incorporated in the hollow body. The chuck drive mechanism can be stored in combination.
[Selection] Figure 1

Description

  The present invention relates to the field of a material testing machine that applies a tensile load to a material to test the tensile strength and the like of the material. In particular, the present invention relates to a small testing machine that is placed on a table in a laboratory or the like and tests the tensile strength of small and small pieces of material.

This type of tensile test is usually performed by a testing machine that employs the principle of a screw feed mechanism consisting of a screw rod and a nut that is screwed onto the screw rod. In this configuration, both screw rods are driven synchronously, a chuck is placed in the center of the gate-shaped yoke, a test piece is gripped by this chuck, and the load is moved by rotating the screw rod. . A desktop type testing machine has been proposed as this gate-standing type testing machine (see Patent Document 1).
Even if such a testing machine is miniaturized by the gate-holding method, it tends to be heavier with two screw rods and its drive system. For this reason, a material testing machine using a single screw rod has also been proposed (see Patent Document 2). This tester is of a type in which one screw rod is suspended from a tester base and a load frame corresponding to a nut screwed to the screw rod is moved up and down to apply a load such as tension. As the screw rod rotates, the load frame moves up and down along the guide rod to load the test piece.
JP-A-10-170419 Japanese Patent Laid-Open No. 10-62327

Such a conventional gate-holding type material testing machine requires a certain size in the lateral width, and further requires a synchronous rotation of both screw rods in the form of standing two screw rods, and the rotational drive mechanism for that is complicated. Increase size. On the other hand, in a testing machine with a single screw rod, the load frame corresponding to the nut must be prevented from rotating (restricted) and is in sliding contact with the fixed frame. This sliding contact itself becomes a resistance and affects the accuracy, and a material testing machine for nano-fabrication cannot be proposed. As described above, the conventional material testing machine has a limit in miniaturization, and it is the actual condition that it is considerably large and heavy although it is a desktop type.
Therefore, although a test of a small or minute material, that is, a nano test is being demanded recently, the above conventional test machine cannot follow the nano-ization. In particular, in the nano material test, the material to be tested is small, that is, an ultra-small piece. For this reason, a test in which the test atmosphere is clean and dust or the like is not desired is important. There is a need to provide a testing machine that can meet these conditions.

  In order to solve the above problems, a small material testing machine provided by the present invention is configured by accommodating a load mechanism using a screw rod method in a cylindrical body having a small cross section. More specifically, a cylindrical body that can be installed on a table and that has a predetermined height in the vertical direction is formed by cutting a half-cylindrical portion of an intermediate portion of the cylindrical body, and a frame that forms the remaining semi-cylindrical portion as a hollow body. As a test machine frame, and a chuck for gripping the test piece respectively disposed above and below the excision site in the test machine frame, and a chuck for gripping the test piece disposed in the hollow body. A chuck driving mechanism that moves up and down is provided.

  Therefore, it is based on a cylindrical body, and the volume of the testing machine can be reduced. Specifically, it becomes possible to secure a test space by excising the semi-cylindrical part, and by making the remaining semi-cylindrical part by excision of the semi-cylindrical part a hollow body, a test load mechanism, that is, a screw rod and a nut is incorporated in the hollow body. The chuck drive mechanism can be stored in combination. Since it is necessary to connect the inside of the hollow body and the chuck, a groove is formed in the flat portion of the hollow body to communicate with the outside air in the longitudinal direction of the cylindrical body. The chuck and the test load mechanism are connected through this groove.

  The present invention is based on the above idea and provides a small material testing machine provided with a door that can open and close a test chamber. More specifically, a cylindrical body that can be installed on a table and that has a predetermined height in the vertical direction is formed by cutting a half-cylindrical portion of an intermediate portion of the cylindrical body, and a frame that forms the remaining semi-cylindrical portion as a hollow body. As a test machine frame, and a chuck for gripping a test piece respectively disposed above and below the cut-out space in the test machine frame, and for holding the test piece disposed in the hollow body A chuck driving mechanism for moving the chuck up and down, and a door for opening and closing the outer periphery of the cylinder in the cut-out space.

More specifically, the shape of the door is formed in an arc shape that can cover the cut semi-cylindrical portion in order to take advantage of the characteristics of the cylindrical body. Further, this arc-shaped door is supported by a support mechanism provided on the outer peripheral portion of the cylindrical body, and moves along the cylindrical support mechanism by the rotational force of a rotational drive source such as an electric motor to open and close the test chamber. To do. Installation of doors is useful for nano-tests that hate dust.
The configuration characterized by the present invention is the above-mentioned two points, but the specific configuration also has various features.

  The present invention is based on a cylindrical body having a certain height in the vertical direction, the structure can be simplified, and the testing machine can be miniaturized. Moreover, the semi-cylindrical part of the cylindrical body in the middle stage part is excised, and the cylindrical body including the remaining half-cylindrical part is formed as a hollow body, so that the rigidity of the cylindrical body itself can be increased. Can provide a machine. We can provide a testing machine that can be used for nanotechnology Furthermore, it has a door that can open and close a test chamber having a semi-cylindrical volume, and is suitable for a nano test that dislikes dust and the like.

  In the present invention, the testing machine is constituted by a cylindrical body, and the half cylindrical portion of the intermediate portion is cut off. The cut half cylinder is the test chamber, and the remaining half cylinder is a hollow body and has a test load mechanism. Another significant feature is the provision of a door that can open and close the test chamber of the semi-cylindrical portion that has been cut at the same time. A compact material testing machine having both features is the best mode. Hereinafter, examples will be described.

  A first embodiment provided by the present invention is shown in FIGS. FIG. 1 is a perspective view of the overall appearance. As the first embodiment, an upper chuck drive type (FIG. 2) for driving the upper chuck up and down and a lower chuck drive type (upper drive for the lower chuck) (FIG. 2). There are two types shown in FIG.

  A feature of the small material testing machine CMT provided by the present invention is that the appearance is based on a cylindrical shape as shown in FIGS. As is apparent from FIG. 1, the cylindrical body 1 is cut out at an intermediate portion and has a U-shape as shown in FIGS. 2 and 3 as viewed from the side. A test piece gripping means for gripping the material to be tested is disposed in the excised space K. The test piece gripping means will be described below. FIGS. 1 and 2 are based on the same method, and both figures will be described.

  A lower chuck 7 is installed on the base surface 2 which is the bottom of the cut-out space K. On the other upper side, the upper chuck 6 is suspended below the movable portion 5T at a position facing the lower chuck 7. The movable portion 5T is attached to the movable frame 5 via a connecting body 5N. A guide groove 4 is formed in the up-down direction in the flat surface portion 3 behind the cut-out space K. On the other hand, a hollow A is formed inside the remaining half-cylindrical portion 1H, and a test load mechanism is provided in the hollow A.

An emergency stop switch 18 is installed on the head 1T at the upper end of the cylindrical body 1, and a door opening / closing drive mechanism, which will be described later, is installed in the head 1T. Further, the lower machine base unit 1B is provided with a rotation driving unit and a control mechanism for a test load described later.
FIG. 2 is a longitudinal sectional view of the small material testing machine shown in FIG. 1, and shows a test piece gripping mechanism and a test load mechanism arranged in the cylindrical body 1.

As is clear from FIG. 2, the upper and lower chucks 6 and 7 are disposed in the cut-out space K, and the upper chuck 6 is attached to the distal end portion of the connecting body 5N connected to the movable frame 5. The movable part 5T is suspended via the load cell 8. The lower chuck 7 is planted on the base surface 2.
The test piece TP is gripped between the upper and lower chucks 6 and 7 by the above configuration, and the state is as shown in FIG. FIG. 5 shows a state in which the test piece TP is gripped by the lower chuck 7, but the test piece TP is held between the gripping pieces 7 </ b> S in the gripping frame 7 </ b> F. In the case of FIGS. 1 and 2, the test piece TP is loaded by the upward movement of the upper chuck 6.

  Next, the load mechanism installed in the hollow A of the cylindrical body 1 will be described with reference to FIG. Reference numeral 9 denotes one screw rod, the lower end of which is rotatably supported by a screw rod support 11, and the upper portion is supported by the screw rod support frame 10. A large gear 12 is integrally attached to a lower portion of the screw rod 9, and a small gear (pinion) 13 is engaged with the large gear 12. Therefore, when the small gear 13 is rotationally driven by the pulse motor 14, the screw rod 9 is rotated, and the movable frame 5 screwed into the screw rod moves up and down by the rotation.

  In this case, the movable frame 5 corresponds to a nut with respect to the screw rod 9, and does not move up and down when rotated with the rotation of the screw rod 9. Therefore, since it is necessary to regulate the rotation, as shown in FIGS. 4 and 5, the movable frame 5 is provided with two guide rollers 5G at two upper and lower portions, respectively. Each guide roller 5G rolls with respect to a guide frame 1L on a rib formed inside the cylindrical body 1. The guide frame 1L is formed in parallel with the screw rod 9, and the movable frame 5 is smoothly moved up and down together with the rolling of the guide roller 5G, and the rotation of the movable frame 5 is restrained. Therefore, the movable frame 5 moves up and down and loads accurately. By the way, the utilization of such a guide frame 1L relies on the fact that the cylindrical body 1 itself has rigidity unlike a rectangular box. The guide roller 5G rolls with respect to the guide frame 1L while sandwiching the guide frame 1L from both sides, and the movable frame 5 moves up and down with high accuracy. In FIG. 4, reference numeral 3 denotes a flat portion, and 4 denotes a guide groove formed in the flat portion 3.

  On the other hand, the electric power energy for rotationally driving the pulse motor 14 is supplied from a battery (storage battery) 15 as shown in FIGS. The operation of starting and stopping the supply is performed by being controlled by a microcomputer (data processor) 16. The microcomputer 16 is also supplied with a signal from the load cell 8 and functions for data processing of test values and display of the values. Further, as shown in FIGS. 2 and 3, a signal transmission system SL is provided, and these signals are also transmitted to the microcomputer 16. Further, the value obtained as a result of this data processing is supplied to the transmitter / receiver 17 and is supplied to a personal computer 19 disposed in a remote place by radio. The personal computer 19 is shown in FIG. 6. FIG. 6 is a perspective view showing the relationship between the personal computer 19 and the small material testing machine CMT. In FIG. 1, reference numeral 20 denotes a switch for turning on and off the small material testing machine CMT.

  A modification of the first embodiment of the present invention is shown in FIG. 3 is different from FIG. 2 in that the lower chuck 7 is connected to the movable frame 5 and is configured to move up and down to apply a load to the test piece TP. In the embodiment of FIG. 3, the movable frame 5 operates at the lower part and is stable. 2 and 3, the connecting body 5N between the movable frame 5 and the upper and lower chucks 6 and 7 penetrates the guide groove 4 and protrudes toward the excision space K side. 3, the same reference numerals as those in FIGS. 1 and 2 have the same functions as those in FIGS. 1 and 2, and detailed description thereof will be omitted.

The second embodiment provided by the present invention is a basic configuration of the small material testing machine in the first embodiment, that is, a small material testing machine based on a cylindrical frame, which opens and closes the test chamber. A door is provided.
More specifically, the door has a semicircular cross section so as to form a part of a cylindrical cylinder, and the door can be moved in an arc along the outer periphery of the cut-out space K. is there. There is provided a door opening / closing drive mechanism capable of automatically making this arcuate movement by a machine.
The second embodiment will be described below with reference to FIGS.
FIG. 7 is a longitudinal sectional view of a small material testing machine CMT in which a door rotation drive mechanism RD is provided in the head 1T. In FIG. 7, the same parts as those shown in FIGS. The components have the same functions as those shown in FIG. 6 and will not be described in detail. The structure of the rotary door 21 and the configuration and operation of the door rotation drive mechanism RD that opens and closes the test chamber by rotating the rotary door 21 along the outer periphery of the cylindrical body 1 will be described in detail.

The pulse motor 22 which is a rotation drive source of the door rotation drive mechanism RD is installed via a fixed frame 23 with respect to the upper end portion 3L of the partition plate 3P.
On the other hand, the revolving door 21 is a semi-cylindrical frame that fits in sliding contact with the inner peripheral surface of the head 1T at the upper end of the cylinder 1, and the diameter below the head 1T increases to increase the diameter of the cylinder 1. The size is set to coincide with the outer peripheral surface. And the lower end is set to the length until it comes close to the base surface 2, and has a size that enables opening and closing of the cut portion K, that is, the test chamber. The upper bearing 24 installed on the cylindrical body 1 is a bearing that supports the upper shoulder of the rotary door 21. The lower end portion of the rotary door 21 is close to the base surface 2 of the machine base portion 1B. The smooth movement of the revolving door 21 in the circumferential direction is ensured.
As shown in FIGS. 8 and 9, internal teeth 21 </ b> G that mesh with the worm teeth of the worm gear 27 are formed on the upper inner peripheral surface of the rotary door 21 made of such a semi-cylindrical frame. The internal teeth 21G are formed in a semicircular arc region. In FIG. 8, 6 is a chuck and 9 is a screw rod.

  On the other hand, a bevel gear 25 is attached to the output shaft 22 </ b> S of the pulse motor 22, and the bevel gear 25 meshes with a bevel gear 26 integrated with a worm gear 27. Therefore, the rotation of the pulse motor 22 is transmitted to the bevel gears 25 and 26 to rotationally drive the worm gear 27, and the rotation of the worm gear 27 causes the semicylindrical rotary door 21 to rotate and move in the arc direction indicated by the arrow. Open and close. By rotating the pulse motor 22 in the reverse direction, the rotary door 21 moves in the reverse direction to open the test chamber. In the semicylindrical rotary door 21, the outer periphery of the cylindrical portion where the internal teeth 21 </ b> G are formed is provided with a bearing 28 with respect to the head 1 </ b> T of the cylindrical body 1, so that the rotary door 21 is smoothly opened and closed. FIG. 10 is a perspective view showing a state in which the rotary door 21 has fully opened the test chamber. In FIG. 10, S is a light emitting unit using LEDs, and emits light during the test.

The features of the small material testing machine provided by the present invention are as described in detail above, but the invention is not limited to the above and illustrated examples, and various modifications can be mentioned.
First, the first embodiment shows an example in which a rotational drive source is installed in the lower part of the cylindrical body 1. Surely, the stability of the entire small material testing machine can be obtained by arranging a weight body such as a rotational drive source below. However, it is possible to arrange a rotational drive source on the upper side. Although described as a method in which control is performed by a microcomputer, a method in which control is performed by a personal computer is also possible. Also, wireless control is possible.

  Although the example which formed the flat part 3 in the remaining semi-cylindrical part which cut off the semi-cylindrical part and was made into the hollow body was shown, it can also be set as the state which does not provide this flat part 3, and can see a load mechanism. . However, in the nano testing machine, the penetration of dust into the mechanical system is not preferable, and the configuration shown in the drawing is preferred. Further, the shapes of the upper and lower chucks 6 and 7 and the shape of the movable frame 5 are not limited to the illustrated example. There are various types and functions of the pulse motors 14 and 22, the battery 15, the microcomputer 16, and the personal computer 19, and the present invention is not limited to the illustrated example. Although the battery (storage battery) system is shown in the above figure, it may be driven by a system that obtains energy from an AC power source.

  Further, in the second embodiment, an example of a system in which the rotation door is moved by combining the rotation output of the pulse motor with the bevel gear system and the worm gear system is shown. An embodiment in which the winding and rewinding operations of the wire are controlled and the rotary door is reciprocated is also conceivable and is not limited to the system using the illustrated gear system. The present invention includes all these modifications.

1 is a perspective view showing an external appearance of a small material testing machine provided by the present invention. It is a longitudinal cross-sectional view which cuts down the small material testing machine which this invention provides, and shows the structure. It is a figure which shows the structure of the upper part of the small material testing machine which this invention provides. It is a figure which shows perspectively a part of semi-cylindrical part in the head of the small material testing machine in this invention. It is a figure which shows the state which the downward chuck | zipper in this invention clamped the test piece. It is a figure which shows the state which carries out personal computer control of the small material testing machine in this invention. It is a figure which shows the structure of the small material testing machine which provided the door which opens and closes a test chamber in the longitudinal cross-section. It is a figure which expands and shows the upper part of a small material testing machine. It is a figure which shows the structure of the upper part in a small material testing machine from upper direction. It is a figure which shows the external appearance of the small material testing machine provided with the rotation door.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical body 1B Machine base part 1H Semi-cylindrical part 1L Guide frame 1T Head part 2 Base surface 3 Plane part 3L Upper end part 3P Partition plate 4 Guide groove 5 Movable frame 5G Guide roller 5N Connection body 5T Movable part 6 Upper chuck 7 Lower chuck 7F Grip frame 7S Grip piece 8 Load cell 9 Screw 杆 10 Screw 枠 support frame 11 Screw 杆 support 12 Large gear 13 Small gear 14 Pulse motor 15 Battery 16 Microcomputer 17 Transmitter / transmitter 18 Stop switch 19 Personal computer 20 Switch 21 Revolving door 21G Internal teeth 22 Pulse motor 22S Output shaft 23 Fixed frame 24 Bearing 25 Bevel gear 26 Bevel gear 27 Worm gear 28 Bearing A Hollow CMT Small material testing machine K Space RD Door rotation drive mechanism S Light emitting portion SL Signal transmission system TP Test piece

Claims (7)

  It is a cylindrical body having a predetermined height, and a semi-cylindrical portion at an intermediate portion of the height is cut off, and a cylindrical body composed of upper and lower cylindrical portions and a semi-cylindrical portion is configured as a tester frame body, A test piece gripping chuck disposed above and below the cut-out space in the test machine frame, and a chuck driving mechanism disposed in the semi-cylindrical portion to move the chuck up and down. A small material testing machine.   The semi-cylindrical portion is provided with a vertical groove, and a connecting body that connects the vertically moving chuck and the movable portion of the chuck driving mechanism is disposed through the groove. The small material testing machine according to claim 1.   The chuck drive mechanism is a screw rod that is held in the semi-cylindrical portion so as to be rotatable in the vertical direction, a nut frame that is screwed into the screw rod and moves up and down with respect to the rotation of the screw rod, and the screw rod. The small-sized material testing machine according to claim 2, comprising: a rotary drive source for rotating, and a connecting body for connecting the nut frame and the chuck.   The semi-cylindrical part is formed with a guide frame projecting inward from the cylindrical wall in a direction parallel to the axis of the cylindrical body, and a roller attached to the nut frame rolls against the guide frame. 4. The small material testing machine according to claim 3, wherein the small material testing machine is configured to be guided as described above.   2. The small material testing machine according to claim 1, further comprising a door for opening and closing the outer periphery of the cylinder in the cut out space.   6. The small material testing machine according to claim 5, wherein the door is formed in an arc shape along the outer periphery of the cylindrical body.   7. The small material according to claim 6, wherein the cylindrical body is provided with a guide mechanism for supporting the arc-shaped door and guiding the movement in the arc direction, and a door driving mechanism for moving the arc-shaped door. testing machine.

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