JPS58173450A - Biaxial tension tester - Google Patents

Abstract

PURPOSE:To prevent the failure in the measuring part of a test piece by tensile force and to enable the measurement of large elongation by constituting a titled tester in such a way that holders can be slided transversely with respect to sliders. CONSTITUTION:The respective forward end parts of a cruciform test piece A are two-folded and a piece of a fine shaft material 19 is inserted in the two-folded parts. The remaining one thick shaft material 19 is placed along the same. The materials 19, 19 are fitted into a groove 16, then the opening of the groove 16 is closed with a cover plate 18 by means of a screw 17. An internal screw 11 is driven with gears 13, 12 by operating a motor 5. Sliders 1, 3 and 2, 4 which face each other are moved in mutually opposite directions by a left-hand internal screw 8 and a right-hand external screw 9. The test piece A is pulled tightly by the material 19. Transverse force is generated in the test piece A on increasing of tensile force, then respective holding means slide by themselves transversely to make the transverse force zero, whereby the concentration of stress at the peripheral part of the measuring part is relieved and the measurment (a detector R) of large elongation is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a biaxial flash tester for membrane materials such as canvas, rubber, and film.

Each edge of the cross-shaped test piece was held by the holders of sliders arranged in four directions, and a tensile integrity test was performed on the test piece while moving the opposing sliders the same distance in opposite directions. In the biaxial tensile test 1iIt machine, a pair of clamping plates, a plurality of through holes formed in alignment with each other in the clamping plate, and bolts and nuts inserted into the through holes are used to tighten the clamping plate. When holding each edge of the test piece, first align the edge with the through hole [after providing the through hole, insert the edge of the test piece between the clamping plates]. Then, a fastener was inserted into the through hole and the through hole to tighten it.
In addition to being time-consuming, if the clamping force is weak, cracks will be formed in the IIt hole making process, resulting in the edge of the test piece coming off from the holder.

In addition, the holder is structured so that it does not slide in the lateral direction (direction that intersects with the tensile force) relative to the slider, so as the tensile force gradually increases, lateral force is generated and stress is concentrated around the measuring part. do.

For this reason, the measurement part was often damaged by a small tensile force, and a large elongation of the measurement part could not be measured.

The present invention aims to solve the above-mentioned drawbacks by easily holding the edge of a test piece and allowing the holder to slide laterally with respect to the slider.

This invention gc slider in four directions! the opposite sliders are moved by the same distance in opposite directions, and a holder that slides in a direction perpendicular to the moving direction of the slider is provided at the opposite end of each slider, and the holder is , a groove, a removable cover plate that closes this groove, and two shaft members that wrap around the ends of the test specimen and fit into the above-mentioned caps! #Provide rocky shores.

More? Embodiments of the present invention will be described based on the drawings.

In the figure, 1, 2, 3.4 are sliders arranged in four directions, and these opposing sliders 1.3 and 2.4
can move the same distance in opposite directions.

The $ power method for the upper tid is shown in the figure, with motor 5 at one end.
The shaft members 6 and 7 connected together intersect in a planar cross shape, and the tips of leftward male screws 8 parallel to the shaft members 6 and 7 are fixed to the outer ends of the sliders 1 and 2, The tip of a rightward male thread 9 parallel to the shaft members 6 and 7 is fixed to the outer end, and a female thread 1 is further supported by a bearing 1υ on the valley male thread 8 and 9.
1 and fixed to the female screw 11 mentioned above.
2 and the gear 13 fixed to the shaft members 6 and 7, the rotational movement of the motor 6 is changed to a linear movement, and each slider ++
1, 2, '%3, 4 are advanced and retreated.

In addition, a shaft member 6 is provided at the inner end of each slider 1, 2, 3.4.
, 7, and is provided with a holder 14 that holds the tip of the test piece A that slides laterally at right angles to the test piece A.

In the illustrated case, the above-mentioned holder 14 includes a plate-shaped body 15, a #416 provided at the tip of the plate-shaped body 15 so that both side surfaces penetrate therethrough and the top surface is open, and an opening on the top surface of the groove 16. It is composed of a cover plate 18 that can be attached to and detached from the plate-like body 15 via screws 17 so as to be closed, and two shaft members 19 that are fitted into the groove 16 around which the tip of the test piece A is wound.

In addition, in the case shown in the figure, a pair of holders 14 are arranged on the left and right,
This holder 14 holds the tip of the test piece A which has been divided into two parts by the slit, but it may also be possible to hold the tip of the specimen A which has been divided into two parts at the same time.

Moreover, the sliding movement of the holder 14 is controlled by the sliders 1, 2, 3, 4.
A horizontal l1llil member 20 is installed on the shaft member 20, and a plate-like member 15 is fitted onto this shaft member 20 via a bearing 21 that moves in the axial direction.

Furthermore, a thrust detector R such as a load cell is provided which acts as the slider moves.

The above-mentioned detector R is interposed between the slider and the male screw in the illustrated case.

The testing machine according to the present invention has the above-mentioned combination, and to explain the test method, first, the daylight end of the cross-shaped test piece is folded into two, and one thin shaft is attached to the two-folded part. The material 19 is inserted through it, and one thick shaft material t remains on the front side of the inserted shaft material 19! Align j.

Next, the shaft material 19.1 on the scrap 16? After fitting, the top opening of the dragon 16 is closed by a cover plate 18 fixed through screws 17 to prevent the shaft member 1υ from escaping.

Then, when the female screw 11 is driven through the mutually meshing gears 13 and 12 by a series of motors 5, the slider 11, which is opposed to each other by the leftward male screw d and the rightward male screw 9, is driven. 1, 3 and 2, 4 move the same distance in opposite directions.

At this time, as the test piece A is pulled, the thick shaft material 1
9-, the shaft material 19 is pulled closer, and the thick shaft material 19
The inner side of the double test piece wrapped around itself tries to unwind in the left direction in Figure 3, but the outer one tries to move in the opposite direction (Figure 3, right time 9). The specimen is tightened as a whole because the corresponding force is not reached.

Additionally, as the tensile force of test specimen A gradually increases, lateral force occurs. Since each holder self-slides in the lateral direction in response to this force, the above-mentioned lateral force becomes zero.

Therefore, the stress concentration around the measuring part s (a part of the corner of each side 1 to be measured) is alleviated.

Note that the measurement associated with the tensile force is performed using detection #iH.

As mentioned above, according to the 2IIIllll tensile test method related to the 9th invention, the floor 1 guard issued to each slider is:
Since the material can be moved simultaneously, the lateral force generated as the tensile force increases will cause the holding tool t1 to work, and the lateral force will be reduced.

Therefore, the stress in the area around tA is relaxed, causing a large tensile force to be applied to the test piece.

In addition, one state was passed through the shrine at the end of the town, and the one remaining Ill111 shrine was placed along the shaft of the inserted shaft, and two thin pieces were inserted in front. At the same time, since the above zl-summer is attached to the IAJ rope from the tray 4 anti-V, it is possible to simply maintain it as a maintenance tool. It can be tightened.

4.1 Me 1111] 111 simple congratulations / diagram is a plan view of the 2-cap test machine related to this production yl, the funeral λ is the same, F's calm t7Iζ is a tiger diagram, funeral 3 diagram is an enlarged lateral view showing the holding groove.

1y2, 3, 4 slider, 6...motor,
b, 7... Shaft material, 6. -3...Male thread, 1υ...Bearing,
11... Female screw, 12... Gear, 13... Gear, 1
4...Maintenance protective equipment, 15...Shogi, 16 Scrap, 17
...Screw, 1#3...Shielding plate, 19...Shaft material, 20...
Shaft material, 21... Bearing, Detector... Patent applicant: Taiyo Kogyo Co., Ltd. Agent: Kama Dekama 2

Claims (1)

[Claims] A slider arranged in four directions and provided so that two opposing sets move the same distance in opposite directions, a plate-shaped body supported on the inner end of the slider so as to be able to slide laterally; It consists of a groove provided at the tip of the plate-shaped body so that the top surface is open, a mounting plate that is removably fixed to the plate-shaped body to trap debris, and two ropes that fit into the debris. Aji Strawberry Award and
Detection i provided to act by hyperactivity of the slider
A biaxial tensile testing machine consisting of /s.