JPH09236527A - Device and method for testing extension of cloth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the extension of cloth which is supposed as actual clothes when deforming it to curvature three-dimensionally and evaluate clothing texture such as swimsuit, leotard, etc., requiring extension in actually wearing condition. SOLUTION: This device is provided with such a mechanism that a rigid body 3 is pressed down at the center of a circular cloth 2 whose outer circumferential part is fixed with a fixing frame 1 having a circular hole, the original plane of the cloth is moved downward and the cloth 2 is deformed into three- dimensional curvature, and another mechanism for controlling the moving quantity and moving route of the body 3. Then, the body 3 is pressed down the center of the cloth 2, moving the original plane of the cloth 2 downward, and the cloth 2 is deformed into three-dimensional curvature as a result. Thus, the extension of the cloth 2 is evaluated by controlling the moving quantity and moving route of the body 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth stretchability tester capable of evaluation closer to actual wear.

[0002]

2. Description of the Related Art Conventionally, JI has been used as a method for testing elasticity of clothing fabrics such as swimwear and leotards that require elasticity.
The SL 1096 method and the JIS L 1018 method are generally used. In this method, a temperature-controlled and humidity-controlled sample is cut into a certain size, and the sample is stretched in one direction to measure the elongation rate and repeated elongation rate at that time.

However, in the conventional test method, since the extension direction is one direction, the deformation of the sample is flat, which is significantly different from the curved surface deformation during actual wearing. Specifically, in the conventional test method, the extension direction is one direction, and therefore the extension contracts in the plane perpendicular to the extension direction during extension. Therefore, the conventional test method cannot test the elasticity assuming actual wear. Also, since the extension direction is one direction, the test was performed twice in the vertical direction and the horizontal direction of the sample, and from the results, the
It estimates the dimensional extension. Therefore, in order to estimate the elasticity when actually worn, the conventional test method requires two tests.

Under these circumstances, a tensile tester for multi-axial directions is disclosed in Japanese Patent Laid-Open No. 2-181629 and Japanese Patent Laid-Open No. 5-18.
No. 0743 is proposed. In these, the sample is
It is stretched by being pulled in the polyaxial direction in the plane. However, since the extension during actual wearing is not two-dimensional in the plane, but three-dimensional with curved surface deformation, a test machine that extends in multiple directions in the plane like these does not It is not possible to test the elasticity assuming.

Further, as a tester for measuring the elasticity of a curved surface when it is actually worn, it has been proposed in Japanese Patent Laid-Open Nos. 3-9240 and 3-10136. In Japanese Patent Laid-Open No. 3-9240, the elongation characteristic is obtained from the relationship between the amount of change in the direction perpendicular to the sample and the load in the polyaxial direction within the sample surface. Therefore, the elasticity of the sample when actually worn is estimated from the values in the respective axial directions. On the other hand, in JP-A-3-10136, the clothing pressure is obtained from the relationship between the amount of change in the direction perpendicular to the sample and the deformation load in that direction. However, since the clothing pressure is obtained from the relationship between the amount of change at a constant stretched position and the deformation load, it is not possible to simultaneously measure the initial stretch characteristics during the stretching process. Further, in the inventions described in the above-mentioned two publications, the sample to be stretched has a square shape, so that the sample which is deformed on the curved surface is likely to stretch diagonally. For this reason, it is different from actual wear, which is uniformly stretched in all directions when deformed on a curved surface. Therefore, a fabric elasticity tester and a fabric elasticity test method more suitable for actual wear are desired, but the fact is that they have not been proposed yet.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the conventional elasticity test method for cloth, and provides an elasticity test device and a cloth elasticity test method more suitable for actual wear assumption. It is to be.

[0007]

In order to solve the above problems, the fabric stretchability testing apparatus of the present invention has the following constitution.

That is, by pressing a rigid body to the center of a circular cloth whose outer peripheral portion is fixed by a fixing frame having circular holes, the center of the cloth is perpendicular to the plane on which the cloth before pressing the rigid body exists. Has a mechanism for three-dimensionally deforming a circular cloth by moving it in the direction, and the amount of movement of the rigid body,
A fabric stretchability test apparatus having a mechanism for controlling a moving path.

Further, the stretchability test method of the cloth of the present invention has the following constitution in order to solve the above-mentioned problems.

That is, a rigid body is pressed against the center of a fixed circular cloth, and the center of the cloth is moved in a direction perpendicular to the plane on which the cloth before pressing the rigid body is present to deform it three-dimensionally. A method for testing elasticity of a fabric, which comprises evaluating the elasticity by controlling the amount of movement of a rigid body and the movement path.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The fabric stretchability testing apparatus of the present invention will be described in detail below with reference to the drawings.

It is also preferred that the test apparatus of the present invention be provided with eight parts. Each part name is a fixed frame (1), a rigid body (3), a movable part (4), a frame (consisting of an upper presser (5), a movable part gauge (6), a base part (7)), a load detection part ( 8), a moving amount detection unit (built in 6) of the movable unit, a recording unit, and a movable unit control unit (11).

The fixed frame (1) is provided to fix the sample (2) perpendicularly to the moving direction of the movable part (4). First, the sample (2) is placed between two rigid plate fixed frames (1).
And fix it. A congruent hole is formed in these two rigid plates, and this hole portion serves as an extension of the sample (2). The shape is not particularly limited, such as a circle or a regular polygon, but a circle is preferable. And sample (2)
Make sure that the edges of the holes overlap when you press and hold. The method of fixing the sample (2) is not particularly limited, and it is also possible to fix it using a needle array arranged in a circle. Moreover, the material thereof is not particularly limited. It is sufficient that the center of the sample (2) does not prevent the sample (2) from being deformed on the curved surface by moving in the vertical direction, and the extension before deformation is circular. The shape of the extension is preferably circular so that the extension direction in the plane of the sample (2) is lost when the sample (2) is extended by curved surface deformation. The size of the hole is also related to the size of the rigid body (3) to be pressed, but if it is too large, deflection due to the weight of the sample (2) will occur, and its effect cannot be ignored, and if it is too small, it will move to a movable part ( When controlling the movement of 4), the accuracy with respect to the size of the hole becomes poor. Therefore, the diameter of the circular hole is preferably 100 mm to 500 mm,
More preferably, it is 100 mm to 300 mm. In this way, the fixed frame (1) to which the sample (2) is attached is provided on the frame. At that time, the sample (2) is made perpendicular to the moving direction of the movable part (4) moving in the frame.

The rigid body (3) pressed against the sample (2) is one that does not deform when pressed against the sample. Specifically, metal such as iron, plastic, wood, or the like can be used. The material is not particularly limited, but iron is preferable for more precise measurement. Since the shape of this rigid body (3) is assumed to be the elbows or knees when actually worn, the shape is symmetric with respect to the axis passing through the center of the rigid body cross section in the direction parallel to the plane in which the cloth exists before the rigid body is pressed against the cloth. Those are preferable. Specifically, it is a column, a sphere, a cone, a regular polygonal column, etc., but a hemisphere or a sphere in which the contact portion has a curvature is preferable in consideration of contact with an elbow or knee during actual wearing. The size is
If the diameter from the shaft is too large, it cannot pass through the holes of the fixed frame (1), and if it is too small, the size of the elbow or knee during actual wearing greatly differs. Therefore, the diameter of the rigid body (3) is preferably 20 to 250 mm. Therefore, the relationship with the holes of the fixed frame (1) is preferably such that the diameter ratio is 1/5 to 2/3.

The diameter ratio in the present invention means a value represented by the following formula.

Diameter ratio = (diameter of rigid body) / (hole diameter of fixed frame) The movable part (4) is perpendicular to the sample (2) fixed to the frame via the fixed frame (1) and within the frame. It is not particularly limited as long as it can move linearly. Then, the rigid body (3) can be fixed to the movable part (4). It is also possible to provide a load detector (8) described later. When fixing the rigid body (3), the axial direction of the rigid body (3) and the moving direction of the movable part (4) are kept parallel. The axis of the rigid body (3) passes through the center of the circular sample (2).

The frame is the skeleton of the test apparatus, and the frame is provided with a fixed frame (1), a movable part (4), a load detection part (8), and a movement amount detection part (built in 6) of the movable part.
The material and shape of the frame are not particularly limited as long as they have little bending. Moreover, the movable part control part (11)
It is also possible to provide.

The load detecting section (8) is a load sensor or a pressure sensor, and may be provided on either the movable section (4) or the frame, but the load when the rigid body (3) is pressed against the cloth. Is preferably provided at a site where can be measured. The data obtained from this detection unit is the recording unit (1
It is recorded sequentially in 1).

The moving amount detecting unit (built in 6) of the movable portion may be provided with a scale on the frame to directly measure the moving amount of the moving portion directly by visual observation, or may be measured electrically using a sensor. Absent. Similar to the load detection unit (8), the data obtained from this detection unit is sequentially recorded in the recording unit (11).

The recording section (11) is a section for recording the data sent from the load detecting section (8) and the moving amount detecting section (built in the moving section) of the movable section, and may be a pen recorder.
It may be recorded by computer processing. It suffices if the respective data of the load detection unit (8) and the movement amount detection unit of the movable unit (built in 6) can be recorded successively.

The movable part controller (11) can control the amount of movement and the movement path of the movable part. Therefore, by controlling the moving amount and moving path of the movable part, the moving amount and moving path of the center of the circular sample (2) in the vertical direction are controlled. However, the origin of the movement at this time is the contact point between the rigid body (3) and the sample (2). Specifically, when the movable part (4) is moved, it can be moved to a certain fixed distance, or can be moved to a certain pressing load. In addition, the movement route is the movement direction, the movement speed, and the number of times they are changed. The moving direction means the direction in which the movable part (4) is pressed against the sample (2) or the opposite direction. The moving speed means the moving speed of the movable part (4),
It is possible to selectively control whether the moving speed is constant or changes. The number of changes in the moving direction and the number of changes in the moving speed can be arbitrarily determined.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.

[Example 1] FIG. 1 is a schematic general view showing a model of an example of a fabric stretchability testing apparatus of the present invention.
FIG. 2 is a schematic overall view showing an example of the sample extension part as a model. FIG. 3 is a schematic cross-sectional view showing an example of the sample extending portion as a model.

An example of the test apparatus in the present invention is composed of eight parts, and the names of the parts are fixed frame (1), rigid body (3), movable part (4), frame (upper retainer (5), movable). Part gauge (6) consisting of a base part (7)), a load detecting part (8), a moving amount detecting part of the movable part (built in 6), a recording part,
And a movable part control part (11).

The fixed frame (1) is 260 mm square and has a thickness of 8 m.
A 230 mm square sample (2) was sandwiched between two rigid plates each having a circular hole with a diameter of 200 mm cut into an iron plate of m, and the sample (2) was fixed by tightening bolts and nuts. The fixed frame (1) was attached to the base part (7) of the frame so that the sample (2) was perpendicular to the moving direction of the movable part (4). Iron was used as the material.

As the sample (2), 5 levels of cloths A to E for inner and sports outerwear as shown in Table 1 were used.

[0027]

[Table 1] As the rigid body (3), a hemispherical steel ball with a diameter of 70 mm is prepared, and first connected to the load detection unit (8) via a cylindrical rod, and the load detection unit (8) is attached to the movable unit (4). It was The rigid body (3) and the rod were coaxial, and the axis and the moving direction of the movable part (4) were parallel. Further, this axis was brought into contact with the center of the extension of the circular sample (2). Therefore, when the rigid body (3) moves the center of the extension part of the sample (2) perpendicularly to the sample (2), the center of the extension part of the sample (2) moves in the vertical direction and three-dimensionally moves. The curved surface was deformed. The diameter ratio, which is the ratio of the diameter of the holes of the fixed frame (1) to the diameter of the rigid body (3), was 70 mm / 200 mm = 0.35.

The movable part (4) was able to move linearly in the frame along the two movable part gauges (6). The motor in the frame was used to move the movable part (4). The rotation speed and rotation direction of the motor were controlled by the movable part control unit (11). Thereby, the movable part (4)
Controlled the amount of movement and the movement route of. The control content, that is, the moving condition will be described later.

The frame comprises an upper presser foot (5), two movable part gauges (6), and a base part (7). The two movable part gauges (6) were parallel to each other and were mounted on the base part (7) so as to sandwich the movable part (4). An upper presser foot (5) was attached to the upper part of the movable part gauge (6) so that these two movable part gauges (6) would not bend. The fixed frame (1) was mounted on the base (7). The rigid body (3) was directly attached to the load detection section (8) via a rod, and then attached to the movable section (4). The movable part movement amount detection part (built in 6) was attached to the movable part gauge (6) which is a part of the frame. The recording unit (11) took in the data from the load detection unit (8) and the movable unit movement amount detection unit (built in 6) described above, and recorded the data during the test by the computer. In the movable part control part (11), the conditions were set so that the movable part (4) would move as follows.

1. The place where the rigid body (3) and the sample (2) contact each other was set as the origin, and the time at this place was set to 0.

2. The movable part (4) was moved downward from the origin at a constant speed of 300 mm / min.

3. The movable part (4) was moved to the origin at a constant speed of 300 mm / min again without stopping after pressing until the pressing load became 1 kg weight.

The amount of movement of the movable part (4) is equal to the amount of displacement of the sample (2). Therefore, the pressing load during movement and the amount of displacement of the sample (2) could be measured by this test method. In the examples of the present invention, data recording and moving part control were performed by a computer.

[0034]

EFFECTS OF THE INVENTION According to the present invention, it is possible to measure the elasticity of a cloth when it is three-dimensionally deformed on a curved surface, assuming the elasticity of the cloth when it is actually worn. It is possible to evaluate the cloth for clothing that is close to actual wear.

In addition to the conventional method, the parts used in the conventional method can be used for the parts other than the fixed frame (1) and the rigid body (3) among the parts constituting the testing machine. The test in this test method can be performed at a small cost.

[Brief description of drawings]

FIG. 1 is a schematic general view showing a model of an example of a fabric stretchability testing apparatus of the present invention.

FIG. 2 is a schematic overall view showing a model of an example of a sample extending portion of the fabric stretchability testing apparatus of the present invention.

FIG. 3 is a schematic cross-sectional view showing a model of an example of a sample extending portion of the fabric stretchability testing apparatus of the present invention.

[Explanation of symbols]

 1: Fixed frame 2: Sample 3: Rigid body 4: Movable part 5: Upper presser 6: Movable part gauge 7: Platform part 8: Load sensor 9: Load cable 10: Movable part movement amount cable 11: Computer

Claims (7)

[Claims] 1. A center of a cloth is fixed by pressing a rigid body to the center of a circular cloth whose outer peripheral portion is fixed by a fixing frame having a circular hole, so that the center of the cloth is perpendicular to a plane on which the cloth before pressing the rigid body exists. An apparatus for testing elasticity of a cloth, which has a mechanism for moving the circular cloth in a three-dimensional curved surface in a three-dimensional direction, and a mechanism for controlling a moving amount and a moving path of the rigid body. 2. The diameter ratio of the rigid body to the diameter of the circular hole is 1/5.
The fabric stretchability test apparatus according to claim 1, wherein the stretchability test apparatus is in a range of 2/3. 3. The cloth stretchability testing apparatus according to claim 1, wherein the load for deforming the circular cloth and the deformation amount of the cloth are recorded. 4. A rigid body is pressed against the center of a fixed circular cloth, and the center of the cloth is moved in a direction perpendicular to the plane in which the cloth before pressing the rigid body is present to deform it three-dimensionally. A method for testing elasticity of a fabric, comprising controlling the amount of movement of a rigid body and a movement path to evaluate the elasticity. 5. The method for testing the stretchability of a fabric according to claim 4, wherein the rigid body has a curved surface. 6. The method for testing the stretchability of a fabric according to claim 4, wherein the load when the circular fabric is deformed and the deformation amount of the circular fabric are recorded. 7. A method for testing the elasticity of a cloth, which comprises using the apparatus for testing the elasticity of a cloth according to claim 1.