JPH02124442A - Compression tester for fiber raised cloth - Google Patents

Abstract

PURPOSE:To make it possible to detect the difference in feeling of raised fibers by moving fiber raised cloth horizontally and freely in the direction where the raised fibers can be easily brought down when the fiber raised cloth is compressed. CONSTITUTION:A pressure sensitive plate 2 is fixed on a base 1. A horizontal plate 4 is fixed to the pressure sensitive plate 2 through a filler bar 3. Many steel balls 5 are arranged on the horizontal plate 4 so that a specimen stage 6 which is mounted on the ball can be moved horizontally. Then, a cross head 8 is horizontally supported with screw shafts 7. A compressing piece 9 is fixed to the lower surface of the central part of the head 8 by way of a seat 8a. Here, a specimen 15 of fiber raised cloth is mounted on the stage 6. When a reversible motor 11 having a speed reducer is rotated in the forward direction, the compressing piece 9 is lowered at a constant speed. The tip compresses the specimen 15. The pressure sensitive plate 2 sends an electric signal corresponding to the pressure to a control board 14. When the pressure value reaches a preset value, the motor 11 is once stopped and rotated into the reverse direction. Thus the compressing piece 9 is made to return. The control board 14 operates the working quantity of the compressing piece 9 from the time the pressure is detected with the pressure sensitive piece to the time when the motor 11 is stopped. The difference in feeling of the raised fiber can be displayed as the difference between the quantity of the compressing work.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a compression testing machine for quantitatively determining the compression characteristics of raised fabrics used for carpets, car seats, upholstery, etc. .

(Prior art) As a device for fixing the compression characteristics of a raised fabric such as a carpet, a sample of the raised fabric is sandwiched between a sample stage and a compressor that can be moved up and down, and the compressor is displaced at a constant speed to compress the fabric. There is a known method in which the amount of work during that time is calculated from the force and the amount of displacement until the compressive force reaches a set value.

(1llll!fi that the invention seeks to solve) As we often experience in everyday life, when we touch the pile of a carpet or car seat with our hands, we experience a large compression resistance when we try to compress the pile in that direction. However, if the direction of compression is slightly changed, the resistance decreases and the nap becomes easier to fall down. Therefore, in order to objectively evaluate the feel of the raised fabric.

It is desirable to consider the direction of pressure and move the compressor or the napped fabric in a direction where the napped fabric is likely to fall down.

However, in conventional compression testing machines, a sample stage is fixed to the upper surface of a pressure-sensitive plate for pressure detection, and a napped fabric sample is fixed on the sample stage. Even if it is possible to detect large differences in compression properties between pile carpets and pile carpets with raised piles, it is possible to detect subtle differences in texture due to differences in the length of raised piles, fineness, etc. between pile carpets. I couldn't do that.

This invention is suitable for compressing a raised fabric with a compressor.

By automatically horizontally moving the napped fabric in the direction in which the napped fabric is likely to fall down, it is possible to quantitatively detect the difference in feel between the napped fabrics due to the difference in the napped fabric.

(Means for Solving the Problems) In the present invention, a sample stage is installed on a pressure sensitive plate, a compressor is provided above the sample stage so as to be movable up and down, and the compressor is lowered at a constant speed so as to be placed on the sample stage. In the compression testing machine for napped fabric, which compresses the napped fabric of The present invention is characterized in that the sample stage is placed on a horizontal plate via a large number of small balls that can be rolled, so that the sample stage can be moved horizontally. The above compressor is preferably a round bar with a diameter of 5 to 30 square meters and a flat tip. Also, small balls.

It is preferable to use 4 to 15 steel balls with a diameter of 3 to 10 square meters, the width of the horizontal plate and sample stand to be 2 to 7 d, and the smoothness (irregularities) of 5 μm or less.

(Function) Since the compressor descends vertically, if the nap of the test piece is vertical, no horizontal force is applied to the sample stage and the compression resistance increases, so the compression resistance can be set by a small amount of descent of the compressor. value is reached and the amount of work is relatively small. On the other hand, if the nap of the test piece is inclined, a horizontal force will be applied to the sample stage due to the lowering of the compressor.

As the sample stage moves in the direction of the horizontal force, the nap becomes more likely to fall, and the amount of descent of the compressor increases until the compression resistance reaches the set value, so that a relatively large amount of work is detected.

(Example) As shown in FIG. 1, a compression load cell (CLB-5L manufactured by Orientic Co., Ltd.) is fixed on a base 1 as a pressure sensitive plate 2, and a horizontal plate 4 is attached to this pressure sensitive plate 2 via a feeler bar 3. is fixed, and 15 steel balls 5 with a diameter of 5I are placed on this horizontal plate 4.
The steel balls 5 are arranged side by side, and the sample stage 6 is placed thereon so that it can be horizontally moved by the rolling of the steel balls 5. On the other hand, a threaded shaft 7 is vertically supported on the left and right sides of the base 1, and the upper threaded portion 7 is supported vertically on the left and right sides of the base 1.
a, 7a are screwed into the female threaded portions at both ends of the crosshead 8 to horizontally support the crosshead 8, and a round rod-shaped compressor 9 with a diameter of 1 oan is fixed vertically downward to the central lower surface of the crosshead 8 via a pedestal 8a. . Then, chain sprockets 10 are fixed to the lower ends of the left and right threaded shafts 7.7, respectively, and the chain sprockets 10.1
An endless chain 13 is wound around a motor sprocket 12 fixed to the output shaft of a reversible motor 11 with a speed reducer located at the top and bottom, and the crosshead 8 is raised and lowered at a constant speed by forward and reverse rotation of the reversible motor 11. In addition, the above pressure sensitive plate 2
The output terminal of the reversible motor 11 and the source terminal of the reversible motor 11 are connected to the control panel 14 by conductive wires 2a and lla, respectively.

In the above structure, the sample 15 of the raised fabric is placed on the sample stage 6.
is loaded, the reversible motor 11 is rotated forward, the compressor 9 is lowered at a constant speed, and when the tip of the compressor contacts the sample 15 and begins to compress the sample 15, an electric signal corresponding to the pressure is sent to the pressure sensitive plate. When the pressure reaches the set value, the reversible motor 11 is temporarily stopped and then reversed to return the compressor 9 to its original position. The amount of work done by the compressor 9 from when the pressure sensitive plate 2 detects the pressure until the reversible motor 11 stops is calculated and displayed within the control panel 14.

Compression tests were conducted on two types of raised fabrics using both the apparatus of the above example and a conventional apparatus (comparative example) in which the steel balls 5 of the apparatus of this example were removed and the sample stage 6 was fixed to the horizontal plate 4. . The shape of the compressor 9 has a diameter of 10III in both cases.
It was made into a round bar shape with a flat tip, and its descending speed was set to 4 m/min, and the change in compressive load with respect to compressive displacement was expressed as
- Recorded on Y recorder, compressive load is 250 g/aJ
We calculated the amount of work required when . The results are shown in the table below.

(Blank below) As shown in the table above, the difference in texture of sample number 1.2, velour-like tricot (puffed fabric) for car seats, is as follows:
Although it was possible to clearly detect the difference in the amount of work when compressed to gf/1ffl, it was not possible to detect the difference in the amount of work in the conventional device (comparative example).

(Effects of the Invention) This invention allows the sample to slide in any horizontal direction depending on the nature of the nap when the sample of the nap fabric is vertically pressurized with a compressor. Differences in the texture and feel of the raised fluff, which could not be detected using conventional compression testing machines with a fixed stand, can be detected as differences in compression work.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the invention. Base, 2: Pressure sensitive plate (load cell for compression), 4: Horizontal plate, 5: Small balls (11 balls), 6: Sample stage, 8: Cross head, 9: Compressor, 11: Reversible motor, 14 Nil I Goban. Patent applicant Toyobo Co., Ltd. Agent Patent attorney Yoshi 1) Tsukasa Ryo

Claims (1)

[Scope of Claims] [1] A sample stage is installed on a pressure-sensitive plate, a compressor is provided above the sample stage so as to be movable up and down, and this compressor is lowered at a constant speed to remove the raised fabric on the sample stage. In a compression testing machine for raised fabrics, which is designed to calculate the amount of work required for the pressure detected by the pressure-sensitive plate to reach a set value, a horizontal plate is fixed on the pressure-sensitive plate, and A compression testing machine for raised fabrics, characterized in that the sample stand is placed on it via a large number of rollable small balls, and the sample stand is configured to be horizontally movable.