TW201610356A - Connection type prism sheet and line light irradiation device with prism sheet - Google Patents

Abstract

Provided are a connection type prism sheet and a line light irradiation device with a prism sheet with which defects in an object being inspected can be reliably detected by a line scanning camera and the like. Connection ends (32A, 32B) in a connecting part (30A) wherein prism sheets (30, 30) are connected to each other are cut at an inclination to a direction crossing the longitudinal direction of a unit prism (31a) and form cut ends (32A, 32B) parallel to each other. The prism sheets (30, 30) are connected to each other such that a part (31b) of the unit prism (31a) is positioned more to at least one side in the longitudinal direction of the unit prism (31a) than a space (S) between these cut ends. Therefore, defects in the object being inspected can be reliably detected by a line scanning camera and the like.

Description

Coupling type cymbal and attached line type light irradiation device

The present invention relates to a bonding type cymbal sheet and a line-type light irradiation device capable of illuminating a line-shaped light.

As an example of the linear light irradiation device, those described in Patent Document 1 are known. In the linear light irradiation device, a plurality of LEDs are arranged in a row along the longitudinal direction in the casing. The outer casing has a pair of left and right side plates and a bottom plate, and an opening is formed on the top plate side, and light having a linear shape of the LED as a light source is emitted from the opening toward the outside.

In the linear light irradiation device, the linear inspection device is used to inspect the inspection object, and the inspection device for detecting the presence or absence of damage, for example, as shown in FIG. 14(a), is configured to include the linear light irradiation device 1 and the line type. The scanning camera 4 irradiates the inspection object W with linear light from the linear light irradiation device 1, and detects the scattered light of the light K by the linear scanning camera 4, thereby checking for the presence or absence of the defect K such as damage. In addition, the inspection object W is wound into a roll shape, and is irradiated from the linear light irradiation device 1 to a predetermined range of the surface of the inspection object W that is unwound from the roller and transferred to the winding roller side. Line shaped light.

In such an inspection apparatus, the direction K that intersects with the transfer (transport) direction of the inspection object W, that is, the defect K that extends in the direction intersecting with the light H emitted from the linear light irradiation device 1 in the plan view can be made. The light H emitted from the linear light irradiation device 1 is scattered by the defect K, and the scattered light is detected by the line scan camera 4; whereas, the direction parallel to the transfer direction of the inspection object W, that is, toward the sum As shown in FIG. 14(b), the defect H1 in which the light H emitted from the linear light irradiation device 1 extends in a direction parallel to the plan view is different in the direction of the scattered light, so that it is difficult to detect the scattered light by the line scan camera 4. H1.

As a result, as shown in FIGS. 1(a) and 1(b), the exit surface of the in-line type light irradiation device 1 is mounted with a cymbal 30, and the cymbal 30 causes the light emitted from the linear light irradiation device 1 to The light is refracted to the left and right and is irradiated to the defect K1, whereby the defect K1 extending in the direction parallel to the light H emitted from the linear light irradiation device 1 can still be made to the defect K1 as shown in Fig. 1(b). The scattered light H1 is detected by the line scan camera 4 by scattering. As described above, the technique of refracting the straight light to the left and right by the cymbal sheet 30 is described, for example, in Patent Document 2.

Prior technical literature Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2012-186015

Patent Document 2: Japanese Laid-Open Patent Publication No. 2006-17487

However, the cymbal is manufactured using a mold formed into a 稜鏡 shape, but for example, in the case where the length of the inspection object in the width direction is several meters, if a cymbal having a length corresponding to the length is to be manufactured, It is necessary to enlarge the mold, which is labor intensive and costly.

In view of this, it is conceivable to connect a plurality of strip-shaped cymbals of a predetermined length in the longitudinal direction thereof to produce a long cymbal (engagement type cymbal), but there are the following problems.

That is, first, as shown in Fig. 15, the cymbal sheet 30 has a cymbal array 31 in which a unit 稜鏡 31a of a plurality of triangular prism shapes is arranged in parallel, and the width of the unit 稜鏡 31a (the juxtaposition of the unit 稜鏡 31a) The length of the side of the unit 稜鏡 of the cross-sectional triangular shape of the direction is, for example, about 50 μm.

On the other hand, in the case where the strip-shaped dam pieces 30 and 30 are joined to each other with their opposite short sides (connection ends) in the longitudinal direction, a gap S is generated between the connection ends. This is because the cymbal sheet 30 is formed of a resin and is likely to expand or contract due to heat, so that it is difficult to completely eliminate the gap S.

As described above, when the cymbals 30 and 30 are connected to each other, as shown in FIG. 15, a gap S is generated between the connection ends of the cymbals 30 and 30, even if the gap S is, for example, only about 0.5 mm, for example, when the unit rib When the width of the mirror 31a is about 50 μm, there are about 10 missing, and in the case of about 25 μm, there are about 20 missing.

Like this, there will be a considerable number of gaps in the gap (between the ends) In the unit 稜鏡31a, the light from the linear light irradiation device 1 is not refracted and is directly irradiated to the inspection object. Therefore, if there is a defect parallel to the direction in the straight direction of the light, the scattered light that is incident on the defect cannot be detected by the line scan camera, and there is a problem that the defect cannot be detected.

The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a connection type cymbal and a ridge line type light irradiation apparatus which can reliably detect a defect of an inspection object by a line scan camera or the like.

In order to achieve the above object, the engagement type cymbal of the present invention comprises a plurality of cymbals having a plurality of cymbals arranged in parallel in parallel, and which are connected to each other in the parallel direction of the cymbal. In the connecting portion where the cymbals are connected to each other, a part of the cymbal is located in a direction crossing the longitudinal direction of the cymbal.

Further, the ridge-line type light irradiation device of the present invention is characterized in that it includes a linear light irradiation device that can illuminate a linear shape and a connection type gusset that is provided on a light exit side of the linear light irradiation device.

Here, the term "column", in addition to the fact that the same shape of the raft is juxtaposed, also includes the size, shape, or size of different sizes and similar shapes. A plurality of types of cockroaches are randomly juxtaposed.

The 稜鏡 in the queue of the same size and shape is called “unit 稜鏡”.

In addition, the term "the cymbal sheets are connected to each other" means, for example, a frame or other substrate on which the cymbal sheets are abutted against each other or are brought into close contact with each other, for example, a linear light irradiation device. The case where the cymbals are indirectly connected to each other; and the case where the cymbals are abutted against each other or they are directly connected by adhesive tape or welding or the like in an approaching state.

Further, in the above-described ridge-line type light irradiation device, the engagement type cymbal includes two types which are integrally provided in the linear light irradiation device and individually disposed at positions away from the linear light irradiation device.

In the connection portion of the cymbal in the connection type cymbal and the cymbal line type light irradiation device of the present invention, a part of the cymbal is disposed in a direction crossing the longitudinal direction of the cymbal, and the connection portion is not lacking all of the connection portion. Hey. Therefore, the light emitted from the linear light irradiation device toward the connection portion of the cymbal is refracted in a predetermined direction by the ridges of the connection portion and is irradiated to the object to be inspected, so that the camera is scanned by a line type. The defect can be detected by detecting the scattered light that is incident on the defect.

In the above configuration of the present invention, it is preferable that at least one of the connection ends of the connection portions that are connected to each other is formed such that the crotch piece is cut in a direction intersecting the longitudinal direction of the crucible.

According to this configuration, even if a gap is formed between the connection ends of the cymbals, all of the ridges are not missing, and a part of the ridge is present on at least one side of the gap (between the cutting ends). Therefore, the same effect as described above can be obtained.

According to the present invention, in the connection portion of the cymbal, a part of the cymbal is located in a direction intersecting the longitudinal direction of the cymbal, so that the defect of the inspection object can be reliably detected by a line scan camera or the like.

1‧‧‧Line type light irradiation device

3, 3A~3D‧‧‧Connected cymbals

4‧‧‧Line Scan Camera

30, 301~305‧‧‧ pictures

30A, 30B, 30C, 30D, 30E‧‧‧ Connections

31a‧‧‧Units (稜鏡)

32A, 32B, 3a~3h‧‧‧ cut-off end (connecting end)

Fig. 1 is a view showing a linear light irradiation device according to an embodiment of the present invention, wherein (a) is a schematic perspective view of a linear light irradiation device model, and (b) is an A arrow view in (a).

Fig. 2 is a perspective view of the in-line type light irradiation device.

[Fig. 3] A cross-sectional view of the in-line type light irradiation device.

Fig. 4 is a view showing an example of the engagement type gusset according to the embodiment of the present invention, wherein (a) is a front view and (b) is a plan view.

Fig. 5 is a plan view showing a first example of a method of connecting the same piece.

Fig. 6 is a plan view showing a second example of the method of connecting the same piece.

Fig. 7 is a plan view showing a third example of the method of connecting the same piece.

[Fig. 8] A perspective view showing a method of attaching the same piece to the outer casing.

[Fig. 9] A cross-sectional view for explaining various pieces superimposed on the same piece.

Fig. 10 is a schematic plan view showing another plural example of the engagement type cymbal according to the embodiment of the present invention.

[Fig. 11] An example for explaining the relationship between the linear light and the cut end (gap) of the cymbal, (a) for the case where the check leak occurs, and (b) for the case where the check leak does not occur. .

[Fig. 12] Another example for explaining the relationship between the linear light and the cut end (gap) of the cymbal, (a) for the case where the check leak occurs, and (b) for the case where the check leak does not occur. Figure.

Fig. 13 is a front elevational view showing another plurality of examples of the cymbal sheet according to the embodiment of the present invention.

Fig. 14 is a view showing an example of a conventional linear light irradiation device, wherein (a) is a schematic perspective view of a linear light irradiation device model, and (b) is an A arrow view in (a).

Fig. 15 shows an example of a conventional cymbal sheet, wherein (a) is a front view and (b) is a plan view.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 (a) is a schematic perspective view showing a model of a reticle-type light irradiation device according to an embodiment of the present invention. The ridge-line type light irradiation device includes a linear light irradiation device 1 that can illuminate a linear shape, and a connection type cymbal 3.

The linear light irradiation device 1 is, for example, a linear scanning camera that irradiates a predetermined irradiation area of the inspection object W with a linear light. The imaging device 4 captures the predetermined irradiation region, and puts the obtained image data into an image processing device (not shown), for example, a product inspection system for performing automatic inspection of defects such as damage or contamination.

Specifically, as shown in FIGS. 2 and 3, the linear light irradiation device 1 includes a casing 5, a plurality of LED wiring boards 6 housed in the casing 5, and a lens which is a rod lens housed in the casing 5. A rod lens 7, a connecting type cymbal 3, and a light-transmitting plate 8 as a protective plate.

The outer casing 5 is made of a long metal and has a substantially U-shaped cross section orthogonal to the longitudinal direction, and has a bottom wall portion 51 extending in the longitudinal direction and a pair extending from the longitudinal direction of the bottom wall portion 51 toward the upper portion. Left and right side wall portions 52, 53.

On the back surface of the bottom wall portion 51, heat dissipation fins 5F for dissipating heat from the LED wiring substrate 6 to the outside are provided in a plurality of sheets at predetermined intervals in the longitudinal direction and in the direction orthogonal to the longitudinal direction. Further, the front and rear side walls 54, 55 are fixed to one end portion and the other end portion of the outer casing 5 in the longitudinal direction by screws or the like. Thereby, the outer casing 5 is formed with a light-emitting opening 5H having a substantially rectangular shape in the upper portion. Further, an electrical connection line 9 for supplying electric power to the LED is extended from the rear side wall 55.

The LED wiring board 6 is a long-shaped substrate on which a plurality of LEDs 61 are mounted, and is fixed to the upper surface of the bottom wall portion 51 of the casing 5. In addition, in the LED wiring board 6, a plurality of LEDs 61 are assembled in one or more columns (one row in FIG. 3) in the short-side direction on the surface of the long printed wiring board, and the optical axes are aligned substantially. The direction is linear in the longitudinal direction. The LED 61 is, for example, packaged in a thin rectangular plate shape. The surface is assembled with LED components in the center.

The lens rod 7 has a length that is substantially the same length as the length of the left and right side wall portions 52 and 53 of the outer casing 5, and is a condenser lens having a substantially circular cross section. The lens rod 7 is disposed in the outer casing 5 in the longitudinal direction above the LED wiring substrate 6. Further, the optical axis of the lens rod 7 coincides with the optical axes of the plurality of LEDs 61.

As shown in FIG. 4, the above-described engagement type cymbal 3 is a product in which a plurality of cymbals 30 which diffuse linear light emitted from the linear light irradiation device 1 are connected in the longitudinal direction. 4(a) is a front view of the engagement type cymbal 3, and (b) is a same plan view.

The cymbal sheet 30 is a left and right strip-shaped sheet in Fig. 4, and has a cymbal array 31 in which a unit 稜鏡(稜鏡) 31a is juxtaposed in parallel. The unit turns 31a are in the shape of a triangular prism, and extend in the short side direction of the cymbal sheet 30, and a plurality of them are formed at regular intervals in the longitudinal direction of the cymbal sheet 30. Therefore, the cymbal sheet 30 is configured to have a serpentine portion (the rafter 31) which is formed by the peaks and valleys continuing along the longitudinal direction thereof. Further, the unit 稜鏡31a has an isosceles triangle shape, and is formed on the top of the side of the equal length, facing the side of the light irradiation, that is, the side of the linear light irradiation device 1, and the side facing the top is disposed. On the line.

Further, the length of the short side of one piece of the cymbal sheet 30 is, for example, about 25 mm, and the length in the longitudinal direction is, for example, about 3000 mm. In contrast, the width of the unit 稜鏡 31a (in the direction of the unit 稜鏡 31a) (in FIG. 4 The unit of the triangular shape of the cross section of the left and right direction 稜鏡31a The length of the side) P is about 50 μm. In Fig. 4, the unit 稜鏡 31a is enlarged and exaggerated.

Such a cymbal piece 30 is connected in the longitudinal direction, thereby constituting the engagement type cymbal 3, and the cymbal pieces 30, 30 are connected to each other at the connection portion 30A to which the cymbal pieces 30, 30 are connected to each other, the unit 稜鏡 31a A part of the unit is located in a direction intersecting (orthogonal) with the parallel direction of the unit 稜鏡 31a, that is, a length direction (up and down direction in FIG. 4(b)).

Specifically, the cut end 32A of one of the cymbals 30 is inclined at the predetermined angle with respect to the longitudinal direction of the unit cymbal 31a, and the cut end 32B of the other cymbal 30 is formed. The inclined side 32B which is inclined at a predetermined angle with respect to the longitudinal direction of the unit turns 31a. Further, the cut ends (cutting edges) 32A and 32B are parallel to each other, and for example, a gap (a gap in a direction intersecting the longitudinal direction of the unit turn 31a) S between the cut ends is 0.5 mm to 1.5. Mm or so.

Further, the protruding end 32A1 of the cut end 32A of the one (left) cymbal 30 is located at the other cymbal 30 than the protruding end 32B1 of the cut end 32B of the other (right) cymbal 30. On the side, the protruding end 32B1 of the cut end 32B of the crotch panel 30 of the other side (right side) is located on the side of one of the crotch panels 30 than the protruding end 32A1 of the cut end 32A of one of the crotch panels 30. Therefore, in the longitudinal direction of the unit 稜鏡 31a (the vertical direction of FIG. 4(b)), the gap S does not penetrate. Therefore, in the connecting portion 30A, a part 31b of the unit turn 31a is located on at least one side of the gap S.

When the adjacent cymbals 30, 30 are connected to each other, for example, as shown in FIG. 5, the cut ends 32A, 32B are abutted against each other, and the cut ends 32A, 32B are included in the cymbal 30, The surface of 30 is attached with a transparent adhesive tape 35, whereby it is carried out. The adhesive tape 35 may be attached only to one surface of the crotch panels 30, 30 or may be attached to both surfaces.

Alternatively, as shown in Fig. 6, after the cut ends 32A, 32B are abutted against each other, the edges along the long sides of the cymbals 30, 30 may be traversed across the ends of the cut ends 32A, 32B. The portions are joined to each other by the welded portion 36, whereby the adjacent jaws 30, 30 are connected to each other.

Further, as shown in Fig. 7, the cut end portions including the cut ends 32A and 32B may be superposed on each other in the thickness direction of the cymbal sheet 30, and then the portions may be welded to each other by welding.

The engagement type cymbal 3 manufactured as described above is provided between the light-transmitting plate 8 as a protective cover and the LSD (lens diffusing plate) 10, as shown, for example, in FIGS. 3 and 8. Further, after the rear side wall 55 is detached from the outer casing 5, the light-transmitting plate 8, the engagement type cymbal 3, and the LSD 10 are overlapped, and are slid along the longitudinal direction of the outer casing 5 to be inserted into the outer casing 5. Thereby, the engagement type cymbal 3 is attached to the outer casing 5.

Further, as shown in FIG. 9, the engagement type cymbal 3 is disposed such that the top of the unit cymbal 31a faces the side from which the light is emitted, that is, the side of the LED wiring substrate 6. Therefore, the light emitted from the LED 61 of the LED wiring board 6 is condensed by the lens rod 7, passes through the LSD 10, and reaches the engagement type cymbal 3, and is refracted in the predetermined direction by the engagement type cymbal 3, and penetrates. Idol After 8 hours, it is irradiated to the object to be inspected.

According to the present embodiment, as shown in Fig. 4, even if a gap S is formed between the connection ends 32A and 32B of the cymbals 30 and 30, the gap S does not lack all of the longitudinal direction of the unit 稜鏡 31a. A part 31b of the unit turn 31a is present on both sides of the gap (between the cut ends) S in the longitudinal direction of the unit turn 31a. Therefore, the light emitted from the linear light irradiation device 1 toward the connection portion 30A of the engagement type cymbal 3 is refracted in a predetermined direction by the unit 稜鏡 31a of the both sides 31b on both sides of the cutting end S, and is irradiated to the inspection. Defect K1 of the object W. Thereby, the scattered light of the defect K1 can be detected by the line scan camera 4, and the defect K1 can be detected. Further, a part of the light emitted from the linear light irradiation device 1 passes through the gap S, so that the amount of light refracted by the portion 31b of the unit turn 31a is correspondingly reduced, but it is already the detection defect K1. A sufficient amount of light.

Further, the engagement type cymbal 3 can be cut obliquely with respect to the longitudinal direction of the strip-shaped cymbal sheet 30, and the cut ends 32A and 32B can be abutted and joined by the adhesive tape 35, so that Made easily.

Further, the engagement type cymbal 3 is not limited to the above-described aspect, and the following type gussets 3A to 3D may be used. According to this, similarly, in the connecting portions 30B, 30C, 30D, and 30E, a part 31b of the unit turn 31a is located in the longitudinal direction of the unit turn 31a.

In the engagement type cymbal 3A, as shown in Fig. 10 (a), the connection end of the cymbal 30 is made to face the length of the unit 稜鏡 31a. The cut end 3a in which the direction of the fork (orthogonal) is cut, and the cut ends 3b and 3b which are cut from the both ends of the cut end 3a toward the longitudinal direction of the unit turn 31a are formed, and The crotch panels 30, 30 are connected to each other by the cut ends 3a, 3b, 3b.

In the engagement type cymbal 3B, as shown in Fig. 10 (b), the connection end of the cymbal 30 is cut by the cut end 3c which is curved in a direction intersecting the longitudinal direction of the unit 稜鏡 31a. In the configuration, the crotch panels 30, 30 are connected to each other by the cut end 3c.

In the engaging type cymbal 3C, as shown in Fig. 10(c), the connecting end of the cymbal 30 is cut by the cutting ends 3d and 3d which are cut in the longitudinal direction of the unit cymbal 31a, and the cutting is continued. The ends 3d and 3d are formed by forming a cut end 3e which is a part of an arc, and the cut pieces 30, 30 are connected to each other by the cut ends 3d, 3d, and 3e.

In the engaging type cymbal 3D, as shown in Fig. 10 (d), the connecting end of the cymbal 30 is cut by the cutting end 3f which is cut in the direction intersecting (orthogonal) with the longitudinal direction of the unit cymbal 31a. And a cut end 3g that is cut in the longitudinal direction of the unit weir 31a to form a stepped cut end, and an end portion of the cut end is obliquely intersected with the longitudinal direction of the unit weir 31a. The cut end 3h whose direction is cut.

Here, the relationship between the linear light (linear light) and the cut end (gap) irradiated from the linear light irradiation device 1 will be described with reference to FIGS. 11 and 12 .

In FIGS. 11 and 12, the symbols L1 and L2 respectively indicate linear light having predetermined widths h1 and h2. In addition, the linear light L1, L2 are in the oblique chain line The portion shown passes through the engagement tabs 3C, 3D.

As shown in Fig. 11 (a), the portion where the cut end 3e constituting a part of the arc intersects with the linear light L1 is substantially parallel to the unit turn 31a. Therefore, in this portion, a portion 31b of the unit crucible 31a does not exist on both sides thereof, and the line type light L1 straightens in the gap between the portion of the cut end 3e (the portion substantially parallel to the unit crucible 31a). Therefore, a check for loss will occur.

On the other hand, as shown in FIG. 11(b), the portion where the cut end 3e constituting a part of the arc intersects with the linear light L2 is substantially parallel to the unit turn 31a. However, in this portion, a part 31b of the unit turn 31a exists on both sides (upper and lower sides in Fig. 11(b)), and this portion of the cut end 3e (which is substantially parallel to the unit turn 31a) In the gap of the line, the linear light L2 is refracted in a portion 31b, so that the inspection loss does not occur.

Further, as shown in Fig. 12(a), the portion where the cut end 3g cut in the longitudinal direction of the unit turn 31a intersects with the linear light L1 is substantially parallel to the unit turn 31a. Therefore, in this portion, a portion 31b of the unit crucible 31a does not exist on both sides thereof, and the line type light L1 will straighten in the gap between the portion of the cut end 3g (the portion substantially parallel to the unit crucible 31a). Therefore, a check for loss will occur.

On the other hand, as shown in FIG. 12(b), the portion where the cut end 3g cut in the longitudinal direction of the unit turn 31a intersects with the linear light L2 is substantially parallel to the unit turn 31a. However, in this portion, a portion 31b of the unit crucible 31a exists on the side (the lower side in Fig. 12(b)), and this portion of the cut end 3g is substantially flat with the unit crucible 31a. In the gap of the line), the linear light L2 is refracted in a portion 31b, so that no check leakage occurs.

As described above, if the leak is detected by the nip piece having the cut end (joining end) which is substantially parallel to the unit 稜鏡, the cut is substantially parallel to the unit 稜鏡 (稜鏡) of the cymbal. The portion where the broken end (connection end) intersects with the linear light must be at least one side of the end of the parallel cut end to be received within the width (range) of the linear light.

In the present embodiment, the unit 稜鏡 31a of the isosceles triangular prism shape is used in parallel as the cymbal sheet 30. Alternatively, it may be used as shown in Figs. 13(a) to (e). The unit shown in the figure is 301~305.

3‧‧‧Connected picture

30‧‧‧ Picture

30A‧‧‧Connecting Department

31‧‧‧稜鏡

31a‧‧‧Units (稜鏡)

31b‧‧ ‧ part of unit 31a

32A, 32B‧‧‧ cut-off end (connection end)

32A1‧‧‧ protruding end of cut end 32A

32B1‧‧‧The protruding end of the cut end 32B

H‧‧‧Light

P‧‧‧Unit 稜鏡31a wide

S‧‧‧ gap

Claims (4)

An engagement type cymbal piece is a splicing type cymbal having a plurality of cymbals arranged in parallel by a plurality of cymbals arranged in parallel in a parallel direction of the cymbal, wherein the aforementioned In the connecting portion where the cymbals are connected to each other, a part of the cymbal is located in a direction crossing the longitudinal direction of the cymbal. The engagement type gusset according to claim 1, wherein the connection end of at least one of the connection portions to which the cymbal pieces are connected to each other is such that the cymbal is crossed in a direction crossing the longitudinal direction of the cymbal It is formed by cutting. A line-type light irradiation device comprising: a line-type light irradiation device capable of illuminating a line-shaped light; and a light-emitting side provided on the light-emitting side of the line-type light irradiation device, as described in claim 1 Connected cymbals. A line-type light irradiation device comprising: a linear light irradiation device that can illuminate a linear shape; and a light emission side provided on the light emission side of the linear light irradiation device, as described in item 2 of the patent application scope Connected cymbals.