JPS6230590B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring device for measuring a drape, that is, a state in which a cloth droops due to its own weight and creases (nodes) are formed.

Aesthetic evaluation criteria for fabrics may be based on tactile and visual factors, and drapability plays an important role as a visual factor along with gloss. If fabrics have different materials, textures, densities, etc., they will have different bending stiffness, shear stiffness, dead weight, etc. that greatly affect drapability, and each will exhibit a unique drape form.

When evaluating the visual beauty of cloth, consideration is given to the form of the nodes unique to the cloth, such as the way it is stretched, the radius of curvature of the curved surface of the nodes, and the number of nodes. Conventionally, to evaluate drape properties, it is common to use the drape coefficient according to the JIS measurement method. , is calculated by the following equation based on the measurement results at that time.

Drape coefficient (%) = As-Ad/Ao-Ad×100
...(1) However, Ao: Sample area Ad: Area of support As: Projected area According to this measurement method, the drape coefficient of the fabric is between 0% and 100%, and its value is The smaller the drape coefficient, the better the drapability. However, when the drape coefficient is less than 30%, a part of the periphery of the sample gets under the support, a so-called reentrant fold phenomenon, which occurs. The JIS method results in inaccurate measurements.
Figure 1 schematically shows this state. When the drape is viewed from directly above, the solid line waveform a enters under the support base b shown in broken lines, and the projected area A is the outer periphery shown by the dashed line. It will have c. Therefore, it is clear that the drape coefficient cannot be measured correctly. In addition, under the JIS measurement conditions, the drape coefficient of thin rayon, flat, and crepe is 25%.
It is said that the degree is the minimum value of the measurable range.

Furthermore, the waveform of the outer periphery of the drape is not limited to the state shown in FIG. 1, but may also be such that the inner part of the inlet widens as shown in FIG. 4, so countermeasures are also required in this case.

The present invention aims to provide a drape measuring device that can easily and accurately measure drape coefficients even in cases where the conventional JIS method cannot accurately measure drape coefficients, as described above.

Embodiments of the present invention will be described in detail below with reference to FIGS. 2 and 3.

The drape measuring device of the present invention shown in FIG. A support stand 2 is fixed.

On the other hand, a support 5 erected on the base 1 is equipped with a stylus base that supports a stylus 7 projecting in the horizontal direction and is equipped with a protrusion measuring device 8 for measuring the amount of protrusion of the stylus 7. 6 is attached so that its vertical position can be adjusted. The stylus 7 has contact sensors 9a and 9b attached to its tip that generate an output upon contact with cloth,
The stylus 7 can be protruded in the axial direction by manual or other driving, for example, by rotating a pinion 12 that engages with a rack 11 provided on a support frame 10 of the stylus 7 using a knob (not shown), and the above-mentioned contact A contact sensor monitor 13 is connected to the sensors 9a and 9b, which displays the output by the movement of the pointer, lighting, sound, etc.

As shown in detail in FIG. 3, one of the contact sensors 9a and 9b is attached to the tip of the stylus 7, and the other contact sensor 9b is attached to the tip of the stylus 7 in the direction of movement of the stylus 7. To make it protrude at right angles,
It is attached to the tip of an elastic flexible rod 14 that passes through the pipe-shaped stylus 7 and projects from its tip bent portion 7a. The stylus 7 is attached to the support frame 10 so as to be rotatable about its axis, and the contact sensor 9b can be used in either the left or right direction for measurement inside the cove as shown in FIG. It can also be held in a protruding state. Drive measurement device 15
Similar to the means for protruding the stylus 7, the protrusion amount measuring device 8 includes a means for elastically protruding the contact sensor 9b with the flexible rod 14, and measures the protrusion amount. It has the same functions as . In addition, the contact sensor monitor 13
can be provided commonly to the contact sensors 9a and 9b, but may also be provided separately.

The calculation control device receives a measurement position set end signal (hereinafter referred to as
It is abbreviated as SE signal. ), the number N is recorded, the signal of the protrusion amount of the stylus 7 at that time is taken in from the protrusion amount measuring device 8, and the settings for the rotation of the support base 2 set in advance in the drive control device are Using the angle θ, the moving angle α of the support base 2 is calculated as follows: α=(N-1)θ±θo (2) where θo is the initial value, and together with this moving angle α, the above-mentioned stylus 7
This outputs the protrusion amount to a recorder (polar coordinate recorder). The calculation control device also receives a recording end signal (hereinafter abbreviated as RE signal) from the recorder.
The drive control device is operated based on the drive control device 3.
Control is also performed to rotate the support base 2 by a set angle θ.

The operation of the calculation control device and the like when measuring the inside of the cove shown in FIG. 4 using the contact sensor 9b will be explained below together with the operation of the drape measuring device.

The drape measurement device having the above configuration measures the position of the drape waveform at each rotational position while rotating the support base 2 by an angle preset in the drive control device.To measure the drape waveform of the sample T, First, the stylus base 6 is adjusted and fixed in the vertical direction along the support 5 so that the stylus 7 is at the measurement position of the drape waveform on the sample T placed on the support base 2. Next, the stylus 7 is manually moved in the horizontal direction, and the movement is stopped at the position where the contact sensor 9a comes into contact with the sample T and the contact sensor monitor 13 confirms that a slight output is generated. At this time, an SE signal is generated using a manual switch or the like and sent to the calculation control device. In the calculation control device, the measurement position is measured by counting this SE signal, that is, the drive device 3 moves the support base 2 at a set angle θ.
The number N of SE signals obtained by repeating the above measurements by rotating the support base 2 is counted and recorded, and at the same time, the movement angle α of the support base 2 is calculated using the setting angle θ set in the drive control device. The amount of movement of the stylus 7 taken into the calculation control device from the protrusion amount measuring device 8 is outputted to the recorder together with the angle α.

The recorder feeds back the RE signal to the calculation control device at an appropriate point after recording ends, but if necessary, the contact sensor should be moved back to a position where it does not touch the sample until this RE signal is generated. .

After receiving the RE signal, the calculation control device drives the drive device 3 via the drive control device, rotates the support base 2 by a set angle θ preset in the drive control device, and performs the next measurement on the sample T. Position stylus 7
to face. Therefore, as mentioned above, the stylus 7
Move the sensor forward and stop it at a position where a slight output is generated from the contact sensor 9a, and turn on the SE using a switch etc.
Output a signal. Below, measurements are repeated according to the sequence described above.

The drape waveform as shown in FIG. 1 can be measured by the contact sensor 9a mentioned above, but
In the case of a drape waveform as shown in the figure, A,
Points B and C cannot be measured with the contact sensor 9a, so the contact sensor 9b is used in this case.

The contact sensor 9b is connected to the tip bent portion 7a of the stylus 7.
The stylus is used after being fixed in a horizontal direction perpendicular to the axial direction of the stylus (radial direction in the support base 2). When you reach the position where you pass the entrance of the rugged cove, manually tighten the flexible rod 14.
By protruding the contact sensor 9b, the sample T
When the contact sensor 9b is brought into contact with points A, B, and C sequentially, and a slight output is confirmed by the contact sensor monitor 13, the protrusion amount measuring device 8 measures the amount of protrusion of the contact sensor 9b in the ' direction, that is, ', ', ' etc.,
The amount of protrusion of the contact sensor 9b by the flexible rod 14 from the drive measuring device 15, that is, ′, ′, ′, etc.
A signal obtained by operating a manual switch or the like is input to the calculation control device, and for example, for point A, the coordinate values, ie, β, are determined by β=tan ^-1 AA'/OA' = OA'/cosβ, and B, C, . . . The coordinate values of each point are determined by the same measurement and outputted to the recorder. Note that after using the contact sensor 9b to measure each point A, B, C, ... that cannot be measured by the contact sensor 9a, the contact sensor 9a measures P.
After measuring the point, the support base 2 is rotated by θ and the next measurement is started.

As is clear from the detailed description above, according to the present invention, it is possible to eliminate measurement errors due to reentrant fold as shown in FIG. Waveforms can also be easily measured.

In addition, as an example of the evaluation method, A, B, and
It can be determined from the ratio of the area of the closed surface surrounded by C, P, etc. and the area of the raw cloth.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the conventional drape coefficient measurement, Fig. 2 is a configuration diagram showing an embodiment of the drape measuring device of the present invention, Fig. 3 is a sectional view of the main part thereof, and Fig. 4 is FIG. 3 is an explanatory diagram regarding measurement of a complicated drape waveform. T... Sample, 2... Support stand, 3... Drive device, 7... Stylus, 8... Protrusion amount measuring device, 9a, 9b... Contact sensor.

Claims (1)

[Claims] 1. A stylus that can be protruded horizontally with respect to a sample support table that is rotationally driven by a drive device is provided, a contact sensor is attached to the tip of this stylus, and a stylus is installed at a right angle to the axial direction of the stylus. 1. A drape measuring device, comprising contact sensors protruding from the drape, and a protrusion amount measuring device provided for these contact sensors.