TWI651490B - Coupling type cymbal and attached line type light irradiation device - Google Patents

Abstract

Provided are an engagement type cymbal and an attached cymbal linear light irradiation device capable of reliably detecting defects of an inspection target by a line scan camera or the like.

The connecting ends (32A, 32B) of the connecting portions (30A) where the cymbals (30, 30) are connected to each other are cut diagonally in a direction crossing the length direction of the unit 稜鏡 (31a), and are made into The cutting ends (32A, 32B) parallel to each other, and the cymbals (30, 30) are located in units 稜鏡 (31a) of each other (31b), which is located more than the units (S) between the cutting ends 稜鏡(31a) It is connected to at least one side in the longitudinal direction, so that a defect of the inspection target can be reliably detected by a line scan camera or the like.

Description

Linking type cymbal and attached cymbal linear light irradiation device

The present invention relates to a coupling type cymbal and a linear light irradiation device with an attached cymbal capable of irradiating linear light.

As an example of a linear light irradiation device, the one described in Patent Document 1 is known. In the linear light irradiation device, a plurality of LEDs are arranged in a column shape along the length direction inside the casing. The housing has a pair of left and right side plates and a bottom plate, and an opening portion is formed on the top plate side, and linear light using an LED as a light source is emitted from the opening portion to the outside.

Such a linear light irradiating device is used to irradiate the inspection object with linear light to check for defects such as damage. For example, as shown in FIG. 14 (a), it is configured to include a linear light irradiating device 1, and a linear type. The scanning camera 4 irradiates a linear light to the inspection object W from the linear light irradiation device 1, and detects the scattered light of the light on the defect K by the linear scanning camera 4, thereby inspecting the presence or absence of the defect K such as damage. The inspection object W is wound into a roll shape, and a predetermined range of the surface of the inspection object W that is unwinded from the roll and transferred to the winding roller side is irradiated from the linear light irradiation device 1 Linear light.

In such an inspection device, a defect K extending in a direction intersecting with the transfer (conveyance) direction of the inspection object W, that is, a direction in which the light H emitted from the linear light irradiation device 1 intersects in a plan view can make the defect K The light H emitted from the linear light irradiating device 1 is scattered by the defect K, and the scattered light is detected by the linear scanning camera 4; on the other hand, in a direction parallel to the transfer direction of the inspection object W, that is, toward and As shown in FIG. 14 (b), the defect K1 of the light H emitted from the linear light irradiating device 1 extends in a parallel direction in a plan view. As the scattered light has a different direction, it is difficult to detect the scattered light with the linear scanning camera 4. H1.

In view of this, as shown in FIGS. 1 (a) and 1 (b), a cymbal 30 is mounted on the exit surface of the light output from the linear light irradiating device 1, and the light emitted from the linear light irradiating device 1 is directed by the cymbal 30. It is refracted to the left and right, and is irradiated to the defect K1. As a result, as shown in FIG. 1 (b), the defect K1 that extends in a direction parallel to the light H emitted from the linear light irradiation device 1 can still cause light to the defect K1. Scatter, and the scattered light H1 is detected by the linear scanning camera 4. As described above, a technique for refracting the straight-ahead light to the left and right by the cymbal 30 is described in Patent Document 2, for example.

Prior art literature Patent literature

Patent Document 1: Japanese Patent Application Publication No. 2012-186015

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

However, the cymbal is manufactured using a mold formed into a cymbal shape. For example, when the length in the width direction of an inspection object is several meters, if a cymbal having a length corresponding to the length is to be manufactured, It is necessary to increase the size of the mold, which has a problem of labor and cost.

In view of this, it is considered that a plurality of band-shaped cymbals of a predetermined length are connected in the length direction to produce a long cymbal (joint type cymbal), but there are the following problems.

That is, first, as shown in FIG. 15, the cymbal 30 has a ridge 31 formed by a plurality of triangular column-shaped units 稜鏡 31a parallel to each other, and the width of the unit 稜鏡 31a (a parallel to the unit 稜鏡 31a The length of the side of the unit triangle of the cross-sectional triangular shape in the direction) is, for example, about 50 μm.

On the other hand, when the band-shaped cymbals 30 and 30 are connected to each other and their opposite short sides (connecting ends) are connected to each other in the longitudinal direction, a gap S is generated between these connecting ends. This is because the cymbal sheet 30 is formed of a resin and easily expands or contracts due to heat. Therefore, it is difficult to completely eliminate the gap S.

In this way, if the cymbals 30 and 30 are connected to each other, as shown in FIG. 15, a gap S will be generated between the connecting ends of the cymbals 30 and 30, and even if the gap S is only about 0.5 mm, for example, when the unit edge When the width of the mirror 31a is about 50 μm, about 10 are missing, and when the width of the mirror 31 a is about 25 μm, about 20 are missing.

In this way, there will be a considerable number of gaps in the gap (between the connecting ends) S. In the unit 稜鏡 31a, the light from the linear light irradiating device 1 is not refracted and is directly irradiated to the inspection object. Therefore, if there is a defect parallel to the direction of the light's straight direction, the scattered light of the defect cannot be detected by the linear scanning camera, and there is a problem that the defect cannot be detected.

The present invention has been developed in view of the foregoing circumstances, and an object thereof is to provide an engagement type cymbal and an attached cymbal linear light irradiation device capable of reliably detecting defects of an inspection target by a line scan camera or the like.

In order to achieve the foregoing object, the connection type cymbal sheet of the present invention is characterized by connecting a plurality of cymbals having a parallel array of cymbals parallel to each other in the parallel direction of the aforementioned cymbals. In the connecting portion where the cymbals are connected to each other, a part of the cymbals is located in a direction crossing the longitudinal direction of the cymbals.

In addition, the cymbal linear light irradiation device according to the present invention includes a linear light irradiation device capable of irradiating linear light, and an engagement type cymbal provided on a light emitting side of the linear light irradiation device.

Here, the so-called "queuing line" means, of course, besides paralleled objects of the same shape, and also includes objects of different sizes and similar shapes. The plural kinds of puppets are juxtaposed randomly.

Units of the same size and shape in parallel are called "unit units".

In addition, "the cymbals are connected to each other" means that, for example, the cymbals are brought into contact with each other or fixed in a state where the cymbals are fixed to, for example, a frame or other substrate of a linear light irradiation device. The cases where the cymbals are indirectly connected to each other; and the cases where the cymbals are in contact with each other or brought close to each other by an adhesive tape or welding, etc.

In addition, in the aforementioned linear light irradiation device with a cymbal, the connection type diaphragm includes two types, which are integrally installed on the linear light irradiation device, and those which are separately installed away from the linear light irradiation device.

In the connecting portion of the cymbal in the connection type cymbal and attached cymbal linear light irradiation device of the present invention, a part of the cymbal is provided in a direction crossing the length direction of the cymbal, and the connecting portion does not lack all of the Alas. Therefore, the light emitted from the linear light irradiating device toward the connection portion of the diaphragm will be refracted in a predetermined direction and irradiated to the defect of the inspection object by being disposed on the connection portion. Therefore, a linear scanning camera is used. By detecting the scattered light of the defect, the defect can be detected.

In the aforementioned configuration of the present invention, it is preferable that at least one of the connection ends of the connection portions where the cymbals are connected to each other is formed by cutting the cymbals in a direction crossing the longitudinal direction of the cymbals.

According to this structure, even if a gap is generated between the connecting ends of the cymbals, all of the cymbals are not missing, and a part of the cymbals exists on at least one side than the gap (between the cut ends). Therefore, the same effects as described above can be obtained.

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

1‧‧‧ linear light irradiation device

3.3A ~ 3D‧‧‧Joint type cymbal

4‧‧‧ Line Scan Camera

30, 301 ~ 305‧‧‧ 稜鏡

30A, 30B, 30C, 30D, 30E‧‧‧Connecting section

31a‧‧‧Unit 稜鏡 (稜鏡)

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

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

[Fig. 2] A perspective view of the in-line light irradiation device.

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

[Fig. 4] An example of an engagement type cymbal according to an embodiment of the present invention is shown, in which (a) is a front view and (b) is a top view.

[Fig. 5] A first example for explaining a method of connecting the cymbals with a plan view.

[Fig. 6] A plan view for explaining a second example of the method of connecting the cymbals.

[Fig. 7] A third example for explaining a method of connecting the cymbals with a plan view.

[Fig. 8] A perspective view for explaining a method of mounting the same diaphragm to the casing.

[FIG. 9] A cross-sectional view for explaining various sheets superimposed on the same cymbal sheet.

[Fig. 10] A schematic plan view of another example of the connection 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) is an explanatory diagram for the case where inspection leakage occurs, and (b) is an explanatory diagram for the case where no inspection leakage occurs. .

[Fig. 12] Another example for explaining the relationship between the linear light and the cut end (gap) of the cymbal, (a) is an illustration for the case of inspection leakage, and (b) is for the case of no inspection leakage Illustration.

[Fig. 13] Schematic front views of other examples of sepals according to the embodiment of the present invention.

[Fig. 14] An example of a conventional linear light irradiation device is disclosed, (a) is a schematic perspective view of a model of the linear light irradiation device, and (b) is an arrow A view in (a).

[Fig. 15] An example of a known cymbal is disclosed, in which (a) is a front view and (b) is a top view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 (a) is a schematic perspective view of a model of a linear light irradiation device with an epiphysis according to an embodiment of the present invention. The attached cymbal linear light irradiation device includes a linear light irradiator 1 capable of irradiating linear light, and an engagement type cymbal 3.

The linear light irradiation device 1 is, for example, an object that irradiates a linear light to a predetermined irradiation area of the inspection object W, and a linear scanning camera is used. The imaging device 4 waits for the aforementioned predetermined irradiation area and puts the obtained image data into an image processing device (not shown), such as a product inspection system for automatically inspecting the presence or absence of defects such as damage or contamination.

Specifically, as shown in FIGS. 2 and 3, the linear light irradiation device 1 includes a housing 5, a plurality of LED wiring substrates 6 housed in the housing 5, and a rod lens, that is, a lens housed in the housing 5. A rod lens 7 and an engaging diaphragm 3 and a light transmitting plate 8 as a protective plate.

The casing 5 is made of a long metal, and its cross section orthogonal to the longitudinal direction has a rough shape. It has a bottom wall portion 51 extending in the longitudinal direction, and a pair of upper wall portions 51 extending from both sides in the longitudinal direction of the bottom wall portion 51 to the upper portion. The left and right side wall portions 52 and 53.

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

The LED wiring substrate 6 is a long 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 case 5. In addition, the LED wiring board 6 is formed by assembling a plurality of LEDs 61 in a short side direction in a row or a plurality of rows (one row in FIG. 3) on the surface of the long printed wiring board, so that the optical axes are roughly aligned. The direction is linear with the long side. LED61, for example, packaged in a thin rectangular plate Surface mount type with LED components in the center.

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

As shown in FIG. 4, the connection type cymbal 3 is a product obtained by connecting a plurality of cymbals 30 that diffuse linear light emitted from the linear light irradiation device 1 in the longitudinal direction. In addition, FIG. 4 (a) is a front view of the engagement type cymbal 3, and (b) is a plan view of the same.

The cymbal sheet 30 is a left-right long strip-shaped sheet in FIG. 4, and includes a plurality of ridges 31 formed by arranging a plurality of units 稜鏡 (稜鏡) 31a in parallel. The unit 稜鏡 31a is a triangular column-shaped object, and extends toward the short side of the cymbal 30, and a plurality of units are formed at a certain interval in the longitudinal direction of the cymbal 30. Therefore, the cymbal plate 30 is structured to have a ridge portion (a ridge line 31) having a sawtooth section in cross section formed by the peaks and valleys extending in the longitudinal direction. In addition, the cross section of the unit 稜鏡 31a has an isosceles triangle shape, and is formed on the tops of sides of equal length, facing the light irradiation side, that is, the side of the linear light irradiation device 1, and the side facing the top is arranged. On the line.

In addition, the length of the short side of one cymbal 30 is, for example, about 25 mm, and the length in the longitudinal direction is, for example, about 3,000 mm. In contrast, the width of the unit 稜鏡 31a (in the parallel direction of the unit 稜鏡 31a (in FIG. 4) (Left-right direction) The length of the side) P is about 50 μm. In FIG. 4, the unit 稜鏡 31 a is enlarged and exaggerated.

Such a cymbal 30 is connected in the longitudinal direction, thereby constituting an engaging type cymbal 3, and the cymbals 30, 30 are connected to each other at a connecting portion 30A. The cymbals 30, 30 are connected to each other, and the unit 稜鏡 31a is A part is located in a direction crossing (orthogonal) with the parallel direction of the unit 稜鏡 31a, that is, the length direction (the up-down direction in FIG. 4 (b)).

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

In addition, the protruding end 32A1 of the cut end 32A of the cymbal 30 on one side (left) is located further than the protruding end 32B1 of the cut end 32B of the cymbal 30 on the other side (right). On the side, the protruding end 32B1 of the cut end 32B of the other cymbal 30 is located on the side of the one cymbal 30 than the protruding end 32A1 of the cut end 32A of the one cymbal 30. Therefore, the gap S does not penetrate in the longitudinal direction of the unit 稜鏡 31a (the up-down direction in FIG. 4 (b)). Therefore, at the connection portion 30A, a part 31b of the unit 稜鏡 31a is located on at least one side of the gap S.

When the adjacent cymbals 30 and 30 are connected to each other, for example, as shown in FIG. 5, the cutting ends 32A and 32B are mutually offset, and the cutting ends 32A and 32B are included in the cymbals 30 and 30. A transparent adhesive tape 35 is attached to the surface of 30, thereby proceeding. The adhesive tape 35 may be attached to only one surface of the cymbals 30, 30, or may be attached to both surfaces.

Alternatively, as shown in FIG. 6, after cutting ends 32A and 32B offset each other, the edges along the long sides of the cymbals 30 and 30 will be stretched across the ends of the cutting ends 32A and 32B. The parts are bonded to each other by the welding part 36, thereby connecting the adjacent cymbals 30, 30 to each other.

Alternatively, as shown in FIG. 7, the cut ends including the cut ends 32A and 32B may be overlapped with each other in the thickness direction of the cymbal 30, and then the parts may be fused to thereby be connected.

As shown in FIG. 3 and FIG. 8, the coupling type cymbal 3 manufactured in this manner is disposed between the light transmitting plate 8 and the LSD (lens diffusion plate) 10 as a protective cover. After the rear side wall 55 is detached from the case 5, the light transmitting plate 8, the connection type cymbal 3, and the LSD 10 are overlapped, and they are slid along the length direction of the case 5 to be inserted into the case 5. Thereby, the engaging type cymbal 3 is attached to the case 5.

In addition, as shown in FIG. 9, the connection type cymbal 3 is arranged such that the top of the unit 稜鏡 31 a faces the light emitting side, that is, the LED wiring substrate 6 side. Therefore, the light emitted from the LED 61 of the LED wiring board 6 is condensed by the lens rod 7 and then passes through the LSD 10 to reach the coupling type cymbal 3, and the coupling type cymbal 3 is refracted and penetrates in a predetermined direction. Idol After 8 hours, the test object was irradiated.

According to this embodiment, as shown in FIG. 4, even if a gap S is generated between the connecting ends 32A and 32B of the cymbals 30 and 30, the gap S does not lack all of the length of the unit 稜鏡 31a. A part 31b of the unit 稜鏡 31a exists on both sides of the gap (between the cut ends) S in the longitudinal direction of the unit 稜鏡 31a. Therefore, the light emitted from the linear light irradiating device 1 toward the connecting portion 30A of the coupling type cymbal 3 is refracted in a predetermined direction by a part 31b of the unit 稜鏡 31a located on both sides of the cut-off end S, and is irradiated to the inspection. Defect K1 of the object W. Thereby, the scattered light on the defect K1 can be detected by the linear scanning camera 4 and the defect K1 can be detected. In addition, a part of the light emitted from the linear light irradiating device 1 passes through the gap S, so the amount of light refracted in the part 31b of the unit 稜鏡 31a will be reduced accordingly, but it is already a small amount for detecting the defect K1. Sufficient amount of light.

In addition, for the connection type cymbal 3, the end of the band-shaped cymbal 30 can be cut obliquely with respect to the length direction, the cut ends 32A and 32B can be abutted, and the adhesive tape 35 can be connected. Easily manufactured.

The connection type cymbal 3 is not limited to the above-mentioned aspect, and the connection type cymbals 3A to 3D may be used as follows. In this way, similarly, at the connecting portions 30B, 30C, 30D, and 30E, a part 31b of the unit 稜鏡 31a is located in the longitudinal direction of the unit 稜鏡 31a.

In the engagement type cymbal 3A, as shown in FIG. 10 (a), the connecting end of the cymbal 30 is intersected by the length direction of the unit 稜鏡 31a. The cut ends 3a that are cut in the direction of the fork (orthogonal) and the cut ends 3b and 3b that are cut in the length direction of the unit 长度 31a from both ends of the cut end 3a are formed by borrowing The cymbals 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 connecting end of the cymbal 30 is cut by a cutting end 3c that is cut in a curve in a direction crossing the length direction of the unit 稜鏡 31a. The cymbals 30 and 30 are connected to each other by the cut end 3c.

In the engagement 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 length direction of the unit 稜鏡 31a, and the cut is continued. The ends 3d, 3d and a cut end 3e constituting a part of the arc are formed, and the cymbals 30, 30 are connected to each other by the cut ends 3d, 3d, 3e.

In the engagement type cymbal 3D, as shown in FIG. 10 (d), the cutting end 3f of the connecting end of the cymbal 30 is cut in a direction crossing (orthogonal) to the length direction of the unit 稜鏡 31a. And a cut end 3g cut in the length direction of the unit 稜鏡 31a to form a stepped cut end, and an end portion of the cut end is provided to intersect with the length of the unit 稜鏡 31a diagonally The direction of the cut end is 3h.

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

In FIGS. 11 and 12, symbols L1 and L2 denote linear lights having predetermined widths h1 and h2, respectively. In addition, the linear lights L1 and L2 are in diagonal chain lines, respectively. The parts shown are connected by the joint type cymbals 3C, 3D.

As shown in FIG. 11 (a), the part where the cutting end 3e constituting a part of the arc intersects with the linear light L1 is substantially parallel to the unit 稜鏡 31a. Therefore, in this part, there is no part 31b of the unit 稜鏡 31a on both sides, and in this part of the cut end 3e (the part which is approximately parallel to the unit 稜鏡 31a), the linear light L1 will go straight , So inspection misses occur.

On the other hand, as shown in FIG. 11 (b), the portion where the cutting end 3e constituting a part of the arc intersects with the linear light L2 is approximately parallel to the unit 稜鏡 31a. However, in this part, there is a part 31b of the unit 稜鏡 31a on both sides (upper and lower sides in FIG. 11 (b)), and in this part of the cut-off end 3e (a part which is substantially parallel to the unit 稜鏡 31a) ), The linear light L2 is refracted at a portion 31b, so no inspection leakage occurs.

In addition, as shown in FIG. 12 (a), the portion where the cut end 3g cut in the length direction of the unit 稜鏡 31a intersects with the linear light L1 is substantially parallel to the unit 稜鏡 31a. Therefore, in this part, a part 31b of the unit 稜鏡 31a does not exist on both sides, and the linear light L1 will go straight in the gap between this part of the cut end 3g (the part which is substantially parallel to the unit 稜鏡 31a). , So inspection misses occur.

In contrast, as shown in FIG. 12 (b), the portion where the cutting end 3g cut in the length direction of the unit 稜鏡 31a intersects with the linear light L2 is substantially parallel to the unit 稜鏡 31a. However, in this part, there is a part 31b of the unit 稜鏡 31a on one side (the lower side in FIG. 12 (b)), and at this cut end 3g (this part is substantially flat with the unit 稜鏡 31a) In the gap between the lines), the linear light L2 is refracted at a portion 31b, so no inspection leakage occurs.

As described above, to check for leaks by using an engagement type cymbal with a cut end (connecting end) substantially parallel to the unit 稜鏡, cut the unit 切 (稜鏡) approximately parallel to the unit 稜鏡The portion where the broken end (connecting end) intersects with the linear light must be received within the wide range (range) of the linear light by at least one side of the end of the parallel cut end.

In addition, in this embodiment, as the cymbal 30, an isosceles triangular prism-shaped unit 稜鏡 31a is used in parallel. However, in addition to this, it is also possible to use a unit having a shape as shown in Figs. 13 (a) to (e). The units shown in the figure are 301 ~ 305.

Claims (2)

An engagement type cymbal is an engagement type cymbal formed by connecting a plurality of cymbals in parallel with a plurality of cymbals parallel to each other in a parallel direction of the aforementioned cymbals, characterized in that: In the connecting portion where the cymbals are connected to each other, a part of the cymbal having the other cymbal is positioned in a direction intersecting with the length direction of the one cymbal to which the cymbals are connected. The connecting end in the middle is cut in a direction diagonally intersecting with the long side of the cymbal, and includes cutting ends that are parallel to each other. The cymbal pieces are designed so that a part of the cymbal is located more than the cuts. The ends are also connected by at least one side in the longitudinal direction of the ridge. A linear light irradiation device with a cymbal is provided, comprising: a linear light irradiation device capable of irradiating linear light; and a connection formed by connecting a plurality of cymbals that diffuse linear light emitted from the linear light irradiation device. The cymbal-type linear light irradiation device with cymbals is characterized in that the cymbals have a plurality of ridges parallel to each other in parallel, and the cymbals are connected to each other in the juxtaposition direction of the cymbals. In the connecting portion, a part of the cymbal of the other cymbal is positioned in a direction crossing the longitudinal direction of the cymbal of one of the cymbals connected to each other. It is cut in a direction diagonally crossing the long side direction of the cymbal, and includes cutting ends parallel to each other. The cymbal pieces are designed so that a part of the cymbal is located closer to the edge than the cutting ends. The mirrors are connected on at least one side in the longitudinal direction.