JPH084597Y2 - Abrasion resistance tester for cloth - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a wear resistance tester for fabrics, and more specifically, for evaluating wear resistance of a uniform during sliding in a baseball game, or for motorcycle competitions. The present invention relates to an evaluation tester suitable for evaluation of wear resistance of motorcycle competition wear when a racer falls.

[Prior Art] Conventionally, a uniform form method, which is JIS L 1018A method, or a universal form method, which is JIS L 1018B method, has been generally used as an evaluation method for physical education clothing fabrics including baseball uniform fabrics. There is.

In both test methods, when a uniform tension is applied to a test piece having a diameter of 7 to 12 cm, and the surface of the material is abraded in multiple directions by a predetermined abrasive paper under a constant pressure load, the test piece is broken. The number of times of wear is measured, and the average value of the N numbers is used as the evaluation value of the wear resistance strength.

[Problems to be solved by the invention] However, since both test methods are methods of abrading with abrasive paper, only the surface of the fabric is abraded, and it cannot be said that it is close to actual wearing. At the same time, there is also a problem that the abrasive particles of the abrasive paper fall off. In addition, JIS L1018A method, B
Neither the law nor the grounds for setting evaluation conditions are clear.

For this reason, a testing machine for evaluation that is more suitable for actual wear is desired, but the fact is that it has not been proposed yet.

An object of the present invention is to solve the above-mentioned problems of the conventional evaluation method and to provide an evaluation tester more suitable for actual wear assumption evaluation.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration. That is, a cloth is attached via a cushion material to the side of the rotating body that is driven by a drive motor so as to be rotatable in a substantially horizontal direction at a position facing the ground, and the cloth rotates in contact with the ground while being pressed. An apparatus for testing the wear resistance of a cloth at least, wherein the drive motor and the rotating body are:
A cloth abrasion resistance tester, characterized in that the cloth attached to the rotating body is supported by a supporting member having a pressure adjusting member capable of adjusting a pressing state against the ground.

 Hereinafter, description will be given based on the drawings.

1 and 2 show that the spherical cushion material 3 is provided on the outer peripheral portion of the disk-shaped rotating body 2 having the electric motor 1 as an axis.
Is placed at three positions at an equal angle θ of 120 degrees and an equal distance l around the axis of, and the surface peripheral speed of the fabric attached to the outside of the cushion material 3 is 5.6 m / sec or more, and the outside of the cushion material 3 It is a wear resistance tester in which three grounding legs equipped with springs are installed at equal intervals on the outer circumference of the tester so that the grounding pressure of the cloth attached to the test piece is in the range of 600 to 1200 g / cm ² .

The material of the cushion material is not particularly limited, but it is preferably made of rubber, urethane resin, or leather having elasticity close to that of the human body.

As for the shape of the cushion material, from the viewpoint of maintaining a constant contact angle with the ground contact surface of the cloth sample, at least the portion in contact with the cloth sample is preferably spherical, and the shape of the entire cushion material is sphere, hemisphere or the like. preferable.

The spherical cushion material 3 is evenly arranged at three positions on the outer peripheral portion of the disk-shaped rotating body having the electric motor 1 as an axis, at an equal angle of 120 degrees and at equal distances. In the case of being installed in (1), the installed state and the rotating state of the disk-shaped rotating body are more stabilized, which is preferable.

The surface peripheral speed of the cloth fixed on the surface of the cushion material 3 during the rotation of the electric motor 1 is preferably in the range of 5.6 to 25 m / sec. This is 5.6 m / sec or more, even if the sliding speed of baseball competition is slow, usually 7.1 to 9 m
Because it is within the range of / sec. On the other hand, assuming a motorcycle competition, 11 m / sec or more on ordinary roads, and 22 m / sec, which is equivalent to 80 km / hour on a dedicated driving field such as a circuit.
Considering that it may be more than a second, it is preferable that the surface peripheral speed of the fabric can be adjusted to about 25 m / sec.

It is preferable that the number of rotations of the electric motor 1 can be changed for the evaluation assuming these.

Since the ground contact pressure applied to the lower part of the knee and the rear thigh, which are the normal sliding holes, is different depending on the weight and body type, it is within the range of 600 to 1200 g / cm ² , so the contact of the cloth sample It is preferable that the contact pressure with the ground can be adjusted in the range of 600 to 1200 g / cm ² . Any ground pressure can be adjusted by a pressure adjusting member such as a spring provided on the support grounding leg.

The grounding pressure was determined by installing the tester on the grounding surface as shown in Fig. 1 and applying the maximum allowable load between the cloth sample and the grounding surface.
The value measured with a 10 kg pressure sensor inserted.

For the evaluation of the abrasion resistance of the cloth, the evaluation sample is fixed on the surface of the cushioning material 3, the tester is placed on the grounding surface, and the electric motor 1 is rotated for a certain period of time to observe the degree of destruction of the evaluation sample.

Hereinafter, the present invention will be specifically described with reference to examples.

[Examples] (Example 1) An electric motor 1 having a power consumption of 100 V was used as a rotating member, and a sliderac (transformer) was connected to the electric motor 1 so that the rotation speed could be adjusted.

An aluminum alloy disc 2 having a radius of 400 mm and a thickness of 5 mm was fixed to the electric motor 1. This aluminum alloy disc 2 was equiangularly θ = 120 degrees with respect to the center, and three holes with a diameter of 60 mm were installed at a position at a distance l = 330 mm from the center.

Further, a disc 2'which is the same as the disc 2 except that the diameter of the hole is 40 mm is prepared.

The disk-shaped rotating body is composed of the disk 2 and the disk 2 ', and is connected to the rotating shaft of the electric motor 1 at the center of the disk 2'.

Three softball balls for soft baseballs used as cushioning materials 3 are placed in the holes of the disk 2 ', and the surface thereof is covered with a cloth for motorcycle competition wear, which is a cloth sample, so that the cloth sample comes out from the hole in a spherical shape. Then, the cushion material 3 and the fabric sample were fixed with bolts and nuts. As a result, the cushion material 3 is sandwiched between the disc 2 and the disc 2 '.

The grounding pressure of the cloth sample is the spring 7 which is a pressure adjusting member provided on the supporter grounding leg 5 installed at three places at equal intervals.
Was adjusted to 800 g / cm ² .

The ground to be grounded was under the same conditions as in the diamond in the baseball field.

The number of revolutions of the electric motor 1 is 403 rpm by the slidac.
The surface peripheral speed of the fabric was set to 13.9 m / sec. This corresponds to the average speed of a motorcycle race on the open road.

When it was rotated for 3 seconds under the above conditions, the sand and sand entered the inside of the fabric, and the sliding and perforated shape sample similar to actual wear was obtained in which the fibers were destroyed inside the fabric by the sand and sand, and the sample was reproducible and quantitative. It was confirmed that the test machine is sufficient for evaluation of actual wear to obtain data.

(Example 2) A knit fabric for a baseball uniform was used as a fabric sample, and the surface speed of the fabric sample was measured by adjusting the sliderac.
It was rotated for 5 seconds in the same manner as in Example 1 except that the speed was 7.2 m / sec. This surface peripheral speed corresponds to a general sliding speed of a baseball game.

As a result, sand and sand enter the inside of the fabric, and the sliding perforated shape sample similar to the actual wear in which the fibers are destroyed inside the fabric by the soil and sand is obtained, and the actual wear for obtaining reproducible and quantitative data It was confirmed that the test machine was sufficient for the assumed evaluation.

(Comparative Example) The same two types of evaluation samples as those used in Examples 1 and 2 were subjected to wear evaluation by a universal type tester which is a JIS L 1018B method which is a conventional test method.

 The evaluation conditions were as follows.

Fabric sample size: Circle with a diameter of 12 cm N number: 5 Pressing load: 450 g Abrasive paper: RIKEN CC # 600 Abrasion rate: 125 ± 5 reciprocations / min Reciprocation distance: 2.54 cm As a result, the abrasion resistance tester of the present invention is used Example 1
Compared with No. 2, the perforated shape was in a fluffy state because the surface of the fabric was selectively abraded by the abrasive paper. Due to a mechanism different from the actual wearing condition where sand and sand enter inside, it has a holed shape different from actual wearing, and it is a test machine that is insufficient for evaluation of actual wearing.

[Effects of the Invention] The wear resistance tester of the present invention makes it possible to quantitatively evaluate the wear resistance of baseball uniform wear, motorcycle racing wear, etc. with good reproducibility.

[Brief description of drawings]

1 to 3 are schematic views of an abrasion resistance tester according to the present invention. FIG. 1 is a cross-sectional view of the tester, FIG. 2 is a plan view seen from below, and FIG. 3 is an enlarged view of a ground pressure adjusting unit. In the figure, 1: Electric motor 2, 2 ': Disk 3: Cushion material 4: Support body 5: Grounding leg 6,7: Pressure adjusting member θ: Cushion material installation angle l: Cushion material installation distance from the center of rotation

Claims (2)

[Scope of utility model registration request] 1. A cloth is attached via a cushion material to a side of a rotating body, which is driven by a drive motor, so as to be rotatable in a substantially horizontal direction at a position facing the ground, and the cloth is pressed against the ground. A device for testing the wear resistance of a cloth by rotating the cloth in contact with each other in a state, wherein the drive motor and the rotating body are pressure adjusting members capable of adjusting the pressing state of the cloth attached to the rotating body against the ground. A wear resistance tester for fabrics, which is supported by a support member provided with. 2. The cushion material is spherical, and the rotating body is disk-shaped, and the cushion material is located at equiangular and equidistant positions of 120 degrees around the outer periphery of the disk-shaped rotating body around the drive shaft of the drive motor. The wear resistance tester for a cloth according to claim 1, wherein the grounding legs of the support member provided with the pressure adjusting member are arranged at three positions at equal intervals on the outer periphery of the tester.