KR100226876B1 - Vertical tension tester for optional controlling of test specimen length - Google Patents

Abstract

The present invention relates to a vertical tensile testing machine for exclusively testing a tensile strength of a sample having a short structural length, a tensile strength test capable of performing high tensile strength tests by selectively controlling a test length of a sample (for example, a fiber or an optical fiber) The present invention provides a vertical tensile tester capable of selectively adjusting a test length. The present invention provides a vertical tensile tester, which comprises a fixed plate having a holder for fixing a tensile test material and a movable plate mounted on the frame, A vertical tensile testing machine for testing a tensile strength by moving it up and down, comprising: a fixed drum disposed adjacent to at least one or more adjacent shafts on the same shaft, the drum being adjacent to the tensile tester; A variable dowel installed on at least one of the shafts in such a manner as to be adjacent to the dowel and being adjustable in the horizontal direction with respect to the fixed dowel; Support means for supporting the respective shafts of the fixed and variable pulleys; And angle adjusting means provided on the supporting means for adjusting the horizontal angle of the fixed drum and the variable drum.

Description

Vertical tensile tester capable of selectively controlling the tensile test length of the specimen

The present invention relates to a vertical tensile testing machine, and more particularly, to a vertical tensile testing machine dedicated to the tensile strength test of a sample having a short structural length, which can selectively adjust the test length of a sample (e.g., a fiber or an optical fiber) To a vertical tensile testing machine capable of selectively controlling the length of a tensile test capable of performing a tensile strength test with a high degree of accuracy (accuracy).

Generally, since the fiber has to have the required tensile strength according to the characteristics of the used field, it is subjected to tensile test through the tensile tester after the manufacture of the product.

Such a tensile tester can be generally divided into a vertical tensile tester and a horizontal tensile tester. The vertical tensile tester has an advantage in that it can be installed even in a narrow space. However, since it is structured to be subjected to tensile test only with a short length sample, And the horizontal tensile tester can test the tensile strength of a relatively long sample to obtain highly accurate test data. However, the horizontal tensile tester has a disadvantage in that it is difficult to install in a narrow workplace because it occupies a lot of installation space.

Accordingly, the present invention has been made to solve such conventional problems.

It is an object of the present invention to provide a vertical tensile testing machine that does not require a wide installation space and is a combination of characteristics of a horizontal organs. In addition to being able to perform a tensile test on a long sample, Is a vertical tensile testing machine capable of selectively controlling the length of a tensile test of a specimen so that a high precision test can be performed.

1 is a front view of a vertical tensile testing machine according to the present invention.

2 is a perspective view of a vertical tensile testing machine capable of selectively controlling a tensile test length in a state where a fixed drum and a variable drum are installed in front of a vertical tensile testing machine according to the present invention.

FIG. 3 is a plan view showing a structure of a fixed pulley and a variable pulley provided in front of a vertical tension tester according to the present invention, the distance being adjustable.

4 is a cross-sectional view of a fixed and variable pulley of a vertical tensile testing machine according to the present invention.

5 is a cross-sectional view showing the structure of a fixed and variable shear angle adjusting device according to the present invention.

6 is a plan view showing a twist angle generated when an optical fiber is wound on a pulley in a vertical tensile tester according to the present invention.

FIG. 7 is a view of a vertical tensile tester according to the present invention in which a vertical angle of a variable sheave is adjusted to compensate for a twist angle generated when an optical fiber is wound around a sheave.

DESCRIPTION OF THE REFERENCE NUMERALS

10: vertical tensile testing machine 11: control box

12: frame 13: guide groove

14: Fixing plate 15, 19: Support plate

16: tensile force gauge 17: upper holder

18: movable plate 20: lower holder

22: space adjusting screw 40a, 40b: fixed pulley, variable pulley

42: shaft 44: bearing

46: groove 47: groove surface

50: shaft fixing body 51: shaft hole

60: support 62:

63: pivot shaft 64:

65: shaft hole 66: fixed hole

67: Fixing screw 68: Scale

70: Bracket 71: Screw hole

72: fixing screw 80: supporting frame

90: Optical fiber

A means for achieving the object of the present invention is characterized in that a fixed plate 14 and a movable plate 18 on which a holder for fixing a tensile test material is formed are provided on a frame 12 and the movable plate 18 is moved up and down , Comprising: a fixed drum (40) axially disposed adjacent to at least one shaft (42) adjacent to said tensile tester;

A variable pulley 40b provided on the same shaft 42 so as to be adjacent to the fixed pulley 40a so as to be adjustable in the horizontal direction with respect to the fixed pulley 40a; Supporting means for supporting the respective shafts 42 of the fixed drum 40a and the variable drum 40b;

And angle adjusting means provided on the supporting means for adjusting the horizontal angle of the fixed drum 40a and the variable drum 40b.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of a vertical tensile testing machine according to the present invention, which is supported by a number 12 so as to be movable up and down. A guide rod formed up and down is provided. Reference numeral 11 is a control box.

A support plate 15 is attached to the lower surface of the fixing plate 14 and a tensile force measuring device 16 is provided below the support plate 15. An upper holder 15 for fixing one end of the optical fiber 90 is fixed to the lower portion of the tensile force measuring device 16, (17).

A support plate 19 is attached to an upper portion of the movable plate 18 and a lower holder 20 is provided at an upper portion of the support plate 18 to fix the other end of the optical fiber 90. At this time, the upper and lower holders 20 are divided into two sides, and the gap is adjusted by the gap adjusting screw 22 formed on one side surface.

Referring to FIG. 2, FIG. 2 is a perspective view of a vertical tensile testing machine capable of selectively controlling a tensile test length, in which a fixed drum and a variable drum are installed in front of a vertical tensile testing machine according to the present invention The fixed pulley 40a and the variable pulley 40b are fixed to the support means having the same structure at the front of both side frames 12 between the fixed plate 14 and the movable plate. The fixed pulley 40a is installed close to the front of the tensile testing machine while the variable pulley 40b is installed at a distance from the fixed pulley 40a in front of the tensile tester. At this time, the optical fiber 20 having both ends fixed to the upper and lower holder 17 of the vertical tensile tester is wound around the fixed pulley 40a and the variable pulley 40b.

Referring to FIG. 3, FIG. 3 is a plan view showing a structure of a fixed pulley 40a and a variable sheave provided in front of the vertical tensile tester according to the present invention. The fixed pulley 40a, And the variable sheaves 40b are provided on the same shaft 42 so that the individual pulleys maintain a minimum interval and can rotate independently. A bearing 44 is installed in the inner core of each fixed pulley 40a and the variable pulley 40b so as to be fixed on the shaft 42 so as to receive a minimum frictional resistance and the material of the pulley 40 is also at least (Aluminum, for example) so as to have inertia. A groove 46 is formed in the outer periphery of the fixed pulley 40a and the variable pulley 40b so as to wind the optical fiber 90. The fixed pulley 40a is wound around the ribbon pulley cable 92, And the groove surface 47 of the variable pulley 40b are flat.

3 and 5, the supporting means has a shaft hole 51 into which one end of the shaft 42 is inserted and is vertically communicated with the shaft hole 51, so that the shaft fixing screw 53 is screwed A support base 60 provided at a right angle to the shaft 42 to support and fix the shaft fixing body 50 and a support base 60 to which the support base 60 is fixed, And a frame 80. A height adjusting means is provided at an end portion of the support table 60 so as to be movable up and down with a support frame 80 therebetween. The height adjustment means is a tubular bracket 70 through which the support frame 80 is inserted so that the bracket 70 is vertically penetrated and a plurality of screw holes 71 are formed on the outer circumferential surface of the bracket 70, So that the height of the support frame 80 is adjustable.

An angle adjusting means for adjusting the angles of the fixed pulley 40a and the variable pulley 40b is provided on the support table 60. [ This angle adjusting means is divided into a fixed base 62 fixed to the bracket 70 and a fixed base 64 connected to the shaft fixing body 60. The fixed base 62 has a pivot A shaft hole 63 is protruded and an end of the rotation shaft 64 is provided with a shaft hole 65 into which a pivot shaft 63 is inserted so that the pivot shaft 63 of the shaft 62 is rotatable Lt; / RTI > A fixing hole 66 communicating with the shaft hole 65 at a right angle is formed around the end of the swivel base 64 and a fixing screw 67 for fixing the pivot shaft 63 is fastened to the fixing hole 66. At this time, a scale 68 is formed on the outer circumference of the partition between the fixing table 62 and the rotating table 64 so as to adjust the rotation angle.

Hereinafter, the operation of the present invention will be described.

First, the height of the fixed pulley 40a provided in the vertical tension tester 10 and the height of the variable pulley 40b installed in front of the fixed pulley 40a are adjusted. When adjusting the height of the fixed pulley 40a and the variable pulley 40b, the fixing screws 72 are loosened to the bracket 70 fixed to the outer periphery of the support frame 80, The fixed pulley 40a and the variable pulley 40b are positioned between the upper holder 17 and the lower holder 20 of the tester 10 and then the fixing screws 72 are fastened to the support frame 80. [

When the height of the variable pulley 40b is adjusted as described above, one end of the optical fiber 90 is positioned between the upper side holders 17 provided on the upper fixing plate 14 of the vertical tensile tester 10, The gap between the upper holders 17 on both sides is narrowed by the gap adjusting screw 22, and the optical fiber 90 is fixed. The optical fiber 90 is hooked on one fixed rotary drum 40a of the fixed rotary drum 40a provided between the fixed plate 14 and the movable plate 18 to be fixed to the variable rotary drum 40b provided in front of the vertical tensile tester 10 And then hooked to the other fixed pulley 40a of the vertical tension tester 10 to fix the end of the optical fiber 90 to the upper holder 17 of the fixed plate 14 described above, And fixed to the holder 20. At this time, since a plurality of fixed pulleys 40a provided in the vertical tensile testing machine 10 and the variable pulleys 40b disposed in front thereof are provided, when a test length of the optical fiber 90 is to be selected long, The length of the variable pulley 40b is adjusted by winding the optical fiber 90 several times. In addition, the optical fiber 90 is not wound on the pulley wound once more, and when the winding is performed a plurality of times, the adjacent pulley is sequentially wound.

When the optical fiber 90 is wound on the variable pulley 40b in front of the fixed pulley 40a of the vertical tension tester 10 and then returned to the fixed pulley 40a of the vertical tension tester 10, Or when it is returned to the variable pulley 40b after being wound on the fixed pulley 40a of the vertical tension tester 10 at the variable pulley 40b and then returned to the variable pulley 40b as shown in Figure 6, ). Such a twist angle? Causes a fatal damage to the optical fiber 90 made of a glass material, resulting in an inaccurate tensile test.

Therefore, in order to correct the twist angle alpha of the optical fiber 90 as described above, the variable pulley 40a of the fixed pulley 40a is inclined by the twist angle alpha in the vertical state as shown in FIG. When the fixed pulley 40a and the variable pulley 40b are tilted as described above, the angle of rotation is adjusted by rotating the rotation table 64 of the support table 60. First, the fixing screw 67 provided on the outer circumference of the rotation table 64 is loosened Is rotated from the pivot shaft 63 of the fixed table 62 and then rotated at a correct twist angle alpha by using the scale 68 formed on the outer periphery of the divided portion of the fixed table 62 and the rotating table 64, Tighten the set screw 67 to fix the swivel base 64 to the pivot shaft 63.

When the twist angle α of the optical fiber 90 is corrected by rotating the fixed pulley 40a and the variable pulley 40b as described above, the movable plate 18 is moved.

When the movable plate 18 moves downward, the optical fiber 90 is stretched to increase its length. The fixed pulley 40a and the variable pulley 40b of the vertical tensile testing machine 10 are rotated in accordance with the change of the length of the optical fiber 90. [ At this time, since the fixed pulley 40a and the variable pulley 40b are made of a light material as described above, the inertia is small, and the bearing 44 with the built-in shaft is also precisely manufactured, The resistance generated in the fixed pulley 40a and the variable pulley 40b is almost zero, which is negligible in the tensile test. Therefore, by the operation of the fixed pulley 40a and the variable pulley 40b, tensile test results of the optical fiber 90 having a high accuracy can be obtained even in a narrow space.

On the other hand, the movable plate 18 of the vertical tensile tester 10 continues until a portion of the optical fiber 90 is severed by a tensile force, until the movable plate 18 is operated and the optical fiber 90 is cut Are all measured by a tension meter 16 installed at the lower portion of the fixing plate 14 and outputted through the control box 11 installed at one side of the vertical tension tester 10.

According to the present invention as described above, since the interval between the fixed pulley 40a and the variable pulley 40b of the vertical tensile testing machine can be adjusted, it is possible to select and test the length of the sample to be tested in a narrow space have.

The fixed pulley 40a provided in the vertical tensile testing machine and the variable sheave 40b at the front of the fixed sheave 40a have small resistance values such as inertia and frictional resistance and can freely adjust the angle of the fixed pulley 40a and the variable pulley 40b And the twist generated when the optical fiber 90 is alternately wound on the fixed pulley 40a and the variable pulley 40b can be corrected, so that there is an advantage that a result of the accurate tension test with high accuracy can be obtained.

Claims (8)

There is provided a vertical tensile testing machine for testing a tensile strength by mounting a fixed plate 14 and a movable plate 18 on which a holder for fixing a tensile test material is formed on a frame 12 and moving the movable plate 18 up and down , A fixed drum (40) axially adjacently disposed on the same shaft (42) and installed adjacent to the tensile testing machine; A variable pulley 40b provided on the same shaft 42 so as to be adjacent to the fixed pulley 40a so as to be adjustable in the horizontal direction with respect to the fixed pulley 40a; Supporting means for supporting the respective shafts 42 of the fixed drum 40a and the variable drum 40b; And an angle adjusting means provided on the supporting means for adjusting the horizontal angle of the fixed pulley 40a and the variable pulley 40b. The optical recording medium as claimed in claim 1, wherein grooves (46) are formed in the outer circumference of the fixed pulley (40a) and the variable pulley (40b) so as to wind the optical fiber (90) (47) is flat. The vertical tensile tester according to claim 1, wherein the tensile test length of the specimen is adjustable. 2. The apparatus according to claim 1, wherein the supporting means comprises a fixing hole (52) having a shaft hole (51) into which the shaft (42) is inserted and communicating perpendicularly with the shaft hole (51) A support frame 60 provided at right angles to the shaft 42 to support and fix the shaft fixture 50 and a support frame 80 to which the support frame 60 is fixed A vertical tensile tester capable of selectively controlling the tensile test length of a specimen. The vertical tensile testing machine according to claim 3, wherein a height adjusting means is provided at an end of the support frame (60) so as to be movable up and down with a support frame (80) . [7] The apparatus as claimed in claim 4, wherein the height adjusting means comprises a plurality of screw holes (71) formed on the outer circumferential surface of the tubular bracket (70) through which the support frame (80) The vertical tensile tester according to claim 1, wherein the height of the frame (80) is adjustable. The apparatus according to claim 1 or 3, wherein the angle adjusting means comprises a fixing base (62) fixed to the support frame (80) and having a pivot shaft (63) protruded at an end thereof, And a pivot shaft 64 having a shaft hole 65 into which the pivot shaft 63 is inserted so that the pivot shaft 63 of the fixed shaft 62 is rotatably coupled to the shaft hole 65 A vertical tensile tester capable of selectively controlling the length of a tensile test of a sample The fixing device according to claim 6, wherein a fixing hole (66) communicating with the shaft hole (65) at a right angle is formed around the end of the swivel base (64), and a fixing screw 67) are fastened to each other. The vertical tensile testing machine is capable of selectively controlling the length of the tensile test of the sample. 7. The method according to claim 6, wherein a scale (68) is formed on the outer circumference of the partition between the fixing table (62) and the rotating table (64) Tester.