JPS58175481A - Method for detecting defect of laver sheet - Google Patents

Abstract

PURPOSE:To inspect and classify the defects of laver sheets according to the quality grades, and to reject the off-grade sheet, by adjusting the intensity of the light beam of a light projector with a screen or a color filter in the automatic inspection stage of laver sheets. CONSTITUTION:The laver sheet N transferred by the conveyor 2 is aligned to the required posture by the alignment vibration belts 9, 9 placed at both sides of the conveyor 2, and sent to the intermediate conveyor 4. In the course of passng the laver sheet N through the gap between the conveyor 2 and the conveyor 4, it is irradiated with the light beam 20 emitted from the light projector 17. The screen holder 22 under the projector 17 holds a screen 19 or a color filter. The intensity of the light is controlled according to the required quality grade, and the off-grade sheet can be detected without adjusting the sensitivity of the photoelectric sensor by this arrangement, and rejected by operating the off-grade sheet rejection device 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention provides a defective si! This invention relates to a seaweed defect inspection method for easily and quickly adjusting the volume of the photoelectric sensor itself according to each grade of quality.

(Prior art) Up until now, most of the defective msg inspection has been done by visual inspection, but due to improvements in productivity, the production volume has increased, and the production method has become fully automated, right down to the nori process. is,
The current situation is that the final stage defect inspection is no longer fully automated.

Also, is the S moss defect test extremely? Since there are many subjective (subjective) factors, and there are significant differences in the shape of the product depending on the time of collection, etc., defects that are too large to be absorbed at the beginning of the season may be tolerated near the end of the season. This is quite possible, and inspection and selection are graded. In other words, quality is graded.

Furthermore, conventionally, the quality of the s-convex varies greatly depending on the time of collection and the number of times it is collected, but in any case, it is necessary to select and grade the defective deafness, and until now, it has not been possible for humans to Grade selection was done subjectively by visual inspection.

(Structure of the Invention) In view of the above-mentioned problems, the present invention arranges image sensors to enable response sorting in accordance with the productivity of one sheet per second.
The inspection mechanism has a basic structure in which seaweed is passed through a space where a light beam is projected and a light receiver is installed, and various screens capable of measuring the volume corresponding to each quality grade are used in conjunction with the inspection mechanism, which eliminates the troublesome problems associated with the image sensor itself. By simply combining the above-mentioned screens as appropriate and inserting one between the emitter and receiver without making adjustments each time, adjustments to meet the desired quality grade can be easily and quickly made. In FIG. 1, an automatic seaweed inspection device 1 includes a carry-in conveyor 2, a defect inspection device 3, an intermediate conveyor 4, a defective seaweed removal device 5, a counting device 6, and a folding and unloading device 7.

To explain the carry-in conveyor 2 in detail, as shown in FIGS. 2 to 6, there are a plurality of belt conveyors 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8. A vibrating belt 9.9 for arranging the seaweed is installed on both sides of the vibrating belt 9.9, which is opened slightly above the vertical direction. Vibrating belt 9 from the inside on the opposite side
．． Batting head 10, 10. . . are rotatably provided, and each of the impact rotors 11, 11, . . . hits 11! Head 1
By changing the number of 0.10 pieces, you can change the hitting. - The intermediate conveyor 4 is arranged as an extension of the input conveyor 2, with the distance between the front end of the front IT input conveyor 2 and the front end 14, and the shutter of the defective seaweed removal device 5 is installed close to the front end of the intermediate conveyor 4. The blade 15 can be freely opened and closed between the blade 15 and the tip of the carry-in conveyor 2 based on a sorting command from the defect inspection device 3, which will be described in detail later.

A frame body 16 is installed at the position of the gap 14 between the carry-in conveyor 2 and the intermediate conveyor 4 at right angles to the carry-in conveyor 2, and a floodlight 17 is installed below the carry-in conveyor 2 of the frame body 16 and approximately parallel to the gap 11114. is installed, and a light receiver 18 is provided above the frame 16 to face the light emitter 5117, and this light receiver 1
8 and the carry-in conveyor 2, a screen holder 22 which can hold a screen 19 which will be described later in a replaceable manner and has an elongated hole 21 through which the light ray 20 from the projector 17 passes is installed. 1i1117. (Figure A8 #@) The receiver 18 is equipped with a photoelectric sensor (not shown) and receives the light beam 20 from the projector 17, and determines whether the amount of light received is within the set volume range or not and eliminates the missing seaweed. Device 5
If the quality is outside the predetermined grade range, the shutter blade 15 rotates in the direction of arrow R and moves to the intermediate conveyor 4.
The gap between the tip and the tip is opened to form an evacuation port 23. If it is within the range, the shutter blade rotates in the direction of arrow R/force and the removal port 23 closes.

The front gd screen holder 22 may be of a shelf type with protrusions 24° 24 that allow the screens 19, 19 to be freely replaced as shown in FIG. Various screens are mounted on the rectangular rotating shaft 26.
j, 19. It is also possible to use a rotating screen holder 27 with a protruding structure.Furthermore, as shown in Fig. A directional curtain type screen holder 31 for winding up the hung pulley screen 3G with each screen pattern irises on the winding shaft 28, 28 is attached to the middle of the frame 16 between the light receiver 18 and the gap 111ei14. Good too.

In addition, various patterns on the screen 19, 1 word 11 (A)
Examples of this are shown in 1 to 2, but other color screens (shown in the figure) can also be used to achieve impressive volume adjustments.

(Operation of the invention) To explain the operation of the invention with reference to the drawings of the embodiment, in Fig. 1, there is a
The seaweed N put in for each sheet is indicated by the arrow on the carry-in conveyor 2? However, in Figures 2 to 7, if the loaded seaweed N is not aligned on the carry-in conveyor 2, the vibrating belts 9 for alignment provided on both sides of the carry-in conveyor 2. The striking heads 10, 10.・・・
Since the number of the driving heads 10 of each striking rotor 11 is different, irregular striking S vibrations are given, so both sides of the irregularly inserted sMN are struck irregularly, and the vibrations are generated. The dried seaweed N is arranged in a correct posture on the carry-in conveyor 2 and conveyed to the tip of the carry-in conveyor 2. (Fig. 5) In Fig. a12 and Fig. aI3, the seaweed N that has been conveyed in the correct posture on the carry-in conveyor 2 crosses the gap 14 and is transferred to the adjacent intermediate conveyor 4, but it passes over this gap 14. At this time, the light beam 20 from the floodlight 17 provided below the frame 16 hits the defective part A of the seaweed N as shown in Fig. 1112.
, B, C, or D and enters the light receiver l1118 provided on the upper part of the frame 16, and reaches the pre-adjusted and set volume of the photoelectric sensor (path shown) built into the light receiver 18. Correspondingly, the intensity of the passing light beam 20 is sensed and transmitted to the defective seaweed removing device 5 in the next process. If the seaweed N is good, the shutter blade 15 is rotated in the direction of arrow R/' to remove the missing seaweed from the removal port. 23 is closed, sMN is one of the counting devices 6 in the next process.
However, when the defective product I'l[N' is detected, the shutter blade 15 rotates in the direction of arrow R and moves to the removal port 2.
3, the defective sea @ Hl falls from the exclusion port 23 and is eliminated.

Next, if it becomes necessary to loosen the defect tolerance in FIG. 8 to the extent of the defect C shown in FIG.
The photoelectric sensor installed in 8 is not adjusted at all, and the screen holder H2 is attached to the frame 16 above the gap 14.
A screen 1 has a screen pattern (see Fig. 11) corresponding to a desired quality grade on the protrusions 24, 24 of 2.
9. Inserting 19 in a universal combination (Figure 8) results in the second
Light projected from the projector 17 @20 in Figures and Figures g3
Hann1Jlllll 4 upper m in transit otljkhN no lack 1 [iA, B.

Pass through C or D and the above screen 1'9°19
However, since this screen 19.19 is adjusted to allow the defective part C, it accepts defects up to the size of the defective part C, that is, it is detected as a good product. Since the defective seaweed removal device 5 is commanded to indicate a good product, the shutter blade 15 remains closed and the non-defective seaweed stone N is
passes over the upper surface of the shutter blade 15 and is conveyed to the counting device 6 for the next process. The gap 1114 is a defective portion A that is larger than the defective portion C.

When the defective seaweed N/ having defects A, D, etc. passes through, the light rays 20 that have passed through these defects A, D, etc. pass through the volume-adjusted screen 19, 19, enter the upper light receiver 18, and are detected by the photoelectric sensor. (path shown) detects the defect and acts on the defective seaweed removal device 5, causing the shutter 8! Since the I root Is is rotated in the direction of the arrow R to form the exclusion port 23, the defective product [fN' falls through the formed exclusion port 23 and is removed.

In the above embodiment, the volume was adjusted by inserting the screen 19 with the desired pattern onto the protrusions 24, 24 in the shelf-type screen holding fi22, which allows the screen 19 to be freely replaced. The screen 19 having a desired pattern pattern can be fixed by the ratchet 25 at the position where the light beam 20 passes by rotating the holder H27.
1 winding shaft 28, film screen 30 by 28
The light beam 20 may be transmitted by winding or unwinding it so that the desired pattern appears between the lower guide shafts 29,29.

All of the above screens are colorless and transparent screens with 111118% of black drawn on each screen, but in order to correct the characteristics of image sensors arranged at regular intervals in the photoelectron detection area, the effect of blurring the light intensity and focus is increased. Rather than setting the volume to! In order to improve the effect of correcting the number of pixels, it is easy to select and arrange a screen plate that brings out one or more patterns and a color filter that is suitable for a blurring effect.

■The pattern of the screen was taped taking into account the spacing between the image sensors.

■Vary the thickness and color of the taping.

■The screen is fixedly placed near the focus surface or on the rear surface, or is slid to create a blurring effect and increase the universality of the detection ability.

As described above, arranging a screen or a color filter in the detection zone is a method that can be selected from a wide range of settings, which is much easier than setting the volume of light sensitivity at the time of moss production. The screen does not necessarily need to be inserted in the detection area (the zone where the substance to be detected can be detected), but may be inserted in other zones as well, and the overall blurring effect can be achieved.

The loss of sM occurs naturally in the center, but it is the edges that cause multiple defects when the seaweed is mechanically expanded and contracted from the "misu". It can be said that the deficiency is due to a physical cause.

Due to the defect generation state, the tolerance limit for mechanically generated defects is stricter than that of natural defects even if the size of the defect is the same.

Therefore, it is expected that edge detection will be made more accurate.

(Effects of the Invention) The present invention improves the defect inspection device by irregularly hitting the side edges of the seaweed loaded onto the conveyor with a vibrating belt installed on the R* side of the conveyor to correct the posture of the seaweed. By inserting a screen or color filter matching the desired quality grade between the detection zone and the receiver, the detection of this quality grade can be easily performed on the receiver, which is extremely difficult to detect. There is no longer any need to adjust the spacing of the interior image sensor each time, making it extremely easy to produce three batches of seaweed, which has greatly contributed to the mass production of seaweed, which requires high-quality seaweed. is extremely large.

[Brief explanation of the drawing]

Figure 111 is a front view of the route of the jllIM automatic inspection device implementing the present invention, a! 2[1 is the same, an enlarged front view of the defect inspection equipment section, II 3rR is the same, a side view, Fig. 4 is the same, a front view of the loading conveyor, ms diagram is the same, a plan view, Fig. 6 is the same, Side view, Figure 7 is an enlarged plan view of the alignment vibration belt, Figure 8 is a -sK large perspective view of the screen holder, 1
Figure 19 is a perspective view of a rotating screen holder, S
The tO diagram is a large perspective view at -f16 of the direction curtain type screen holder. It is a solitary plane factor that shows . (Explanation of the main parts of the broom number) 1... Automatic inspection device for Sro 2... Loading conveyor 3... Defect inspection device 5
... Defective seaweed removal device 9 ... Alignment vibrating belt 11 ... Impact rotor 14 ... Gap 15
...Shutter blade 16...Frame body 17...
... Emitter 18 ... Receiver 19 ... Screen 20 ... Light beam 22 ... Screen holder 23 ... Exclusion port 26 ... Square rotation shaft 2
7... Rotating screen holder 28... Winding shaft 30... Film screen 31... Directional curtain type screen holder -... Pattern (of the screen) N...・Seaweed N/...Seaweed (defective product) Figure 2 Figure 3] Figure i4 Figure 5 Figure i-6

Claims (4)

[Claims] (1) In the automatic seaweed inspection process, the sM is aligned and conveyed from both sides on the writing conveyor by hitting and vibrating the side edges of the seaweed, and during the conveyance, the sM is passed through a detection zone between the light source and the seaweed. The volume of the light beam passing through the defect in the sM is filtered by a screen or a copper color filter according to the desired quality grade and excluded in conjunction with a photoelectric sensor without a respective aSS of the image sensor in the receiver. A defect inspection method for seaweed, characterized by automatically instructing a device to eliminate seaweed that deviates from a desired quality grade. (2) The defect inspection method for seaweed according to claim 811, characterized in that various screens or color filters are inserted into the detection zone in a replaceable manner depending on the desired quality grade. (3) The method for inspecting defects in seaweed according to claim 1, characterized in that various screens or color filters are selected with shoulder circumference in the detection zone depending on the quality grade. (4) Paragraph III of the patent claim, characterized in that a directional curtain-type scroll with various filter patterns or colors is selected according to a desired Shinamaru grade by taking the barrel back and putting it back on.
Item - m moss defect inspection method.