JPH0275940A - Method and device for inspecting face of mat - Google Patents

Abstract

PURPOSE:To quickly and accurately inspect a mat face having an arbitrary length over full length by detecting principal factors for quality decision while the mat face is carried in the warp direction and displaying the decided results. CONSTITUTION:A tatami facing A is carried in the direction shown by the arrow on a carrying device 4 and its weight is first found by means of the weight sensor of the device 4. Then the moisture is detected by means of a moisture sensor 5 though a pair of rollers 1A and unevenness in binding is detected by means of a density sensor 6. In addition, a roughness detecting sensor 9 detects the surface roughness of the mat face A. At a rotary drum 17, the detection of the length is started and an uneven color detecting sensor 7 and rush detecting sensor 8 respectively detect the unevenness in color and inferior arrangement and stain of rush. When the tailing end of the mat face A passes the drum 1, the rotation of the drum 17 is stopped and a length sensor 11 detects the length of the mat face A. When the surface of the mat face A is inspected, the mat face A is overturned by means of rollers 1D and 1F and the rear is inspected. Inspection data is processed and result is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tatami mat surface inspection method and apparatus for inspecting the quality of tatami mat surface.

[Conventional technology]

Traditionally, tatami mats that are woven, finished, and dried by Kancho producers and shipped as long rolls (usually 20.8 m long) are visually inspected by inspectors at an inspection site and graded. Ta.

(Problems to be Solved by the Invention) By the way, the actual state of the inspection at the inspection site is performed as described below.

A. Due to processing capacity, out of each inspection vehicle (referred to as one pile, 16 to 20 long items) brought to the inspection site, all but heavy rice cakes are selected for inspection.

B. Furthermore, since it is a visual inspection, it takes a long time to check and check various inspection items, so only a part of the tatami surface is inspected.

C1 A group of inspectors patrols each inspection site and conducts inspections, but the inspectors are appointed by the Wancho Industry Association, which is a voluntary organization, and do not have any qualifications.

Therefore, there are the following problems.

a. Defective products may be mixed in if they are not subjected to sampling inspection.

b. Even if it is handled and inspected, there is only one (20.8m)
Since not everything is inspected, even if there is a defect in the center of the rolled tatami surface, it will be missed.

C0 inspectors conduct inspections based on their experience and intuition,
There are variations in the judgment and lack of reliability.

This has led to a serious situation in which the return rate is as high as 5% to 6% of the amount shipped, widening the disparity in quality between production areas, and increasing distrust of inspectors in their inspections.

In addition, in recent years, instead of the conventional method of inspecting roll-shaped tatami mats, a method of inspecting tatami mats processed into arbitrary lengths has been considered. As the number of inspectors increases, the number of inspectors will be required, and the return rate will not decrease with the conventional sampling inspection method compared to the shipment volume. It is desired to develop an inspection device for this purpose.

The present invention aims to solve these problems, and has as its technical object to provide a tatami surface inspection method and apparatus that can perform quality inspections of all tatami surfaces in a short time and accurately.

Means for Solving Problem C] In order to achieve the above object, the present invention detects the main elements for quality determination while unrolling a tatami mat of any length and transferring it in the warp direction, and after the transfer is finished, This is a tatami surface inspection method that immediately displays the judgment results.

As a device for carrying out the above method, a conveying device is provided for spreading the tatami mats and transporting them in the warp direction.

0. The conveyance device is equipped with a tatami face reversing device to inspect the front and back sides of the tatami mat.

C. A plurality of detection devices are provided along this conveyance device to detect the main elements for quality determination.

2. Furthermore, a calculation device and a display device are provided to calculate a quality judgment value of the tatami mat based on the detection signal of each detection device.

This technical measure was taken.

Examples of the detection device include a weight detection device, a moisture detection device, a density detection device, a color unevenness detection device, an alignment detection device, a roughness detection device, a length detection device, a width detection device, and the like.

Further, the conveying device preferably has a pair of rollers arranged in series in the conveying direction of the tatami surface.

(Function) While the tatami face is transferred and reversed in the warp direction by rollers, reversing rollers, etc., the main elements for quality judgment are weight, moisture, density, color unevenness, lining, thread breakage, unevenness, and blistering. The ridges, ridges, breaks, lengths, widths, etc. of the tatami are detected on the front and back sides of the tatami surface, and the detection signals are processed by the arithmetic unit, and the judgment results are immediately displayed on the display as a grade, etc.

[Embodiments of the invention]

Hereinafter, a preferred embodiment of the present invention will be described based on FIGS. 1 and 2.

Conveying rollers 1A to 1G that can be rotated in forward and reverse directions are arranged vertically or vertically in parallel, and are arranged in series at appropriate intervals in a substantially horizontal direction,
One roller of each conveyance roller 1A to 1E and 1
For F, 1G a-ra, use tatami surface A for example 611/S
ec, feed motor 2A to 2G for feeding at moderate speed
are concatenated together. (2F and 2G are not shown) Also.

It is configured to invert the tatami surface A at 0-ra 1E'. Next, each detection device will be explained in turn.

A conveyance device 4 for detecting overlapping of the tatami surface A is provided on the conveyance starting end side, and is equipped with a weight sensor 4' consisting of a load cell. The weight sensor 4' is connected to the arithmetic and control unit 3 via an amplifier and an A/D converter (not shown), performs measurement in units of 10 (J), and has a so-called auto-zero function.

A moisture sensor 5 is provided between the conveyance roller IA and the conveyance roller 1B. The moisture sensor 5 uses a capacitance method, and an electrode 5a is attached to the surface that comes into contact with the surface of the tatami surface A. The moisture sensor 5 is connected to the arithmetic and control unit 3,
Formed to measure to the nearest 0.1%.

Between the conveyance roller 1B and the conveyance roller 10,
A density sensor 6 having an electrode 6a similar to the moisture sensor 5 is provided. The density sensor 6 determines the density or thickness of the tatami surface A, and based on this, it is determined whether there is uneven tightening.

Width sensors 12A and 12B made of photosensor diodes and the like are provided at both ends of the tatami mat surface A in the width direction, and the width (c+n) of the tatami surface A is calculated by detecting the reflected light from both ends of the tatami surface A. Formed to seek.

Next is the roughness detection device @9 installed between the conveyance roller 1C and the auxiliary O-ra IOA.
A and a light-receiving side 9B, the light-emitting side 9A irradiates the tatami surface A with a laser beam that is not affected by color, detects the amount of reflected light or the angle of reflection of the light-receiving element provided on the light-receiving side 9B, and calculates the amount of reflected light. The surface roughness is detected by the difference in the angle of reflection or the change in the reflection angle. Note that since both the laser beam and the light-receiving element reciprocate in the width direction of the tatami surface A, the locus on the tatami surface 8 person surface becomes a zigzag shape.

Next, the color unevenness detection sensor and alignment detection sensor 8 provided above the rotary drum 17, which has a white peripheral surface and is rotatably supported, will be described. Color unevenness detection sensor 7
To explain the outline, there is a light source installed horizontally across the width direction of the tatami surface A, and three light receiving elements (none of which are shown) are installed horizontally parallel to the light source, and each light receiving element has an R- A G-8 filter is interposed. Further, each light receiving element is processed by being communicated with the arithmetic and control unit 3, data at three locations are compared, and color unevenness is numerically displayed for each light receiving element. In addition, by making the circumferential surface of the rotating drum 7 white,
When the tatami surface is not passing, so-called auto-zero is performed.

The line detection sensor 8 is the same as the color unevenness detection sensor 7 described above.
It is a sensor that compares minute areas, and mainly detects rowing (where two or more grasses are woven side by side due to a loom malfunction, also called cannibalism or double weaving). , mainly consists of a contamination sensor that detects contamination (oil stains, dirt), and both have a background (a reference color plate with similar brightness as the tatami surface) placed horizontally across the width of the tatami surface A, and a background sensor that is parallel to this. A horizontal light source is provided (which may be shared), and 80 sensors are arranged in series in the width direction of the tatami surface. In the row sensor, each cane is compared with the background over its entire length, and a signal is detected based on the difference in light intensity between an abnormal location such as the row can and the background. On the other hand, the pollution sensor is provided with an R-G-B filter or a sensor corresponding to the R-G filter, and the amount of light passing through each filter is compared with a reference threshold, and when it is blacker than the reference or If it is whiter, it is due to contamination, kankiri (rush cut during weaving), katane (a part of the woven fabric where the roots or tips of the wicks are gathered only on one side), and branches (withering due to insect damage, etc.) etc.) will be counted as a mixed fiber.

The rotating drum 17 is provided with auxiliary rollers 10A and 10B near the left and right upper portions thereof, which press the tatami face A against the circumferential surface of the rotating drum 7, so that the tatami face A is pushed against the conveyor roller 1.
When transferred by A to 1D, the rotating drum 7 is formed to rotate accordingly. A length sensor 11 such as a 〇-tally encoder is provided at the axis of the rotating drum 7, and is configured to detect the length of one tatami surface A based on the number of rotations of the rotating drum 17 and the angle when stopped.

Note that the arithmetic and control device 3 includes a display device 13 and a printer 1.
4, alarm device 15, and feed motors 2A to 2G
sequencer 16 is connected.

Since this embodiment is configured as described above, the weight sensor 4
'The tatami surface A on the top is one of the conveyance rollers 1A on the conveyance start end side.
It is inserted into the gap between the pair of rolls, and is guided by an appropriate guide (it is recommended to have a table-shaped object or roll-shaped object on the back side, and guide plates on both sides to prevent it from coming off the conveyance path). While the tatami surface A is transferred to the end of the conveyance, various sensors detect the main elements for determining the quality of the tatami surface A.

That is, the weight (6) sensor 4 calculates the weight fiWkg (in 10 g units) for one tatami mat A, and then the moisture sensor 5 measures changes in moisture moment by moment, and calculates the average moisture value, upper limit value, and lower limit value. Calculate in units of 0.1%.

Next, when the tatami surface A passes through the density sensor 6, the density or thickness between the electrodes is detected, thereby determining irregular tightening defects and the like. Next, the width sensor 12 continuously detects the width of the tatami surface A using an optical sensor.

Next, in the roughness detection sensor 9, the light source (laser light) and the light receiving element are reciprocated from side to side, and the amount of reflected light or the position of the reflected light is detected, thereby determining the roughness of the front surface of the tatami surface A. (poor oak, poor humidification), etc.

When the tatami surface A reaches the rotating drum 17, the rotating drum 17
rotates and starts length detection, and at the same time, the uneven color detection sensor 7 and the line detection sensor 8 start detecting.

That is, in the color unevenness detection sensor 7, the light reflected from the light source on the front surface of the tatami surface A is divided into spectra using an R-G-8 filter, and is processed and processed, and comparisons are made at three locations in the width direction. The degree of color unevenness (wrapping) is expressed numerically for each sheet. On the other hand, the arrangement detection sensor 8 compares the background with the minute area of the front surface of the tatami surface A (for each individual plant) to determine whether the plant is in poor alignment, contamination, etc.

When the end of the tatami surface A passes the rotating drum 7, the rotating drum 7 stops rotating, and the length sensor 11 detects the angle and rotational speed at the time of stopping.

When the detection of the front surface of the tatami surface A is completed, the conveyance roller 1 [
), and is sent to the reversing roller 1E by IE. The tatami surface A that has been reversed by the reversal roller 1E' is sent to the rotary drum 17 with the back side facing up by the transport rollers 1F and 1G. It is detected by a similar effect. When the tatami mat A is sent to the transport roller 1C1, the tatami mat A enters the groove 18 provided at the front end of the transport roller 1C and is discharged from the inspection device.

In this way, the signal detected by each sensor is amplified, A/D converted, and converted into a voltage according to the detection signal, and further converted into a signal that is easy to process in the calculation tII III device 3 and used for calculation. The tatami table A is ranked and immediately displayed on the display device 13.
and is copied to the printer 14.

(Effects of the Invention) As described above, according to the present invention, it is possible to handle the shape of tatami mats processed into arbitrary lengths due to streamlining distribution, eliminate the disadvantages of visual inspection by inspectors, and quickly and accurately. In addition, since the entire length of the tatami mat is inspected, the inspection is fair and impartial.Also, since individual inspections can be carried out in a short time, defective products can be easily and completely removed, and the return rate is significantly reduced. do.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention, and FIG. 2 is a control block diagram thereof. 1A to 1G... Conveyance roller, 2A to 2G... Feed motor, IE'... Reversing roller, 3... Arithmetic control device, 4... Conveyance device, 4-... Weight sensor,
5... Moisture sensor, 6... Density sensor, 7...
・Color unevenness detection sensor, 8... alignment detection sensor,
9...Roughness detection sensor, 10A, 10B...Auxiliary roller, 11...Length sensor, 12.12A. 12B... Width sensor, 13... Display device, 14.
...Printer, 15...Alarm device, 16...
Sequencer 17... Rotating drum, 18... Groove. Patent applicant: Satake Seisakusho Co., Ltd.

Claims (2)

[Claims] (1) While unrolling a tatami mat of any length and transferring it in the warp direction, the main elements for quality determination are detected from the front and back of the tatami mat, and after the transfer is complete, the quality judgment results for the front and back of the tatami mat are immediately detected. A tatami surface inspection method characterized by displaying. (2) In order to spread the tatami facing and transport it in the warp direction, a conveying device consisting of a pair of rollers arranged in series in the conveying direction of the tatami facing is installed, and along this conveying device, the main elements for quality judgment are detected. In a tatami mat inspection device that is provided with a plurality of detection devices, and further provided with an arithmetic unit and a display device that calculates the quality judgment value of the tatami mat based on the detection signal of each detection device, a tatami mat of any length is provided at an arbitrary position. A tatami surface inspection device that performs quality judgment from the front and back sides of the tatami surface by inverting and transporting the tatami surface using a reversing device.