JP5268071B2 - Appearance inspection equipment for parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an visual inspection device for a component capable of stably conveying the component to be inspected, regardless of kind and size of the component to be inspected, while considerably miniaturizing the device, and imaging the component in a multi-angle manner. <P>SOLUTION: The visual inspection device includes an inside rotary table D1 formed with a recess K1 of a prescribed shape to feed the component 20 to be inspected, an outside rotary table arranged on an outer periphery of the inside rotary table D1, a transparent flange component provided integrally with an outer periphery of the outside rotary table, a receiving and delivering means F1 for receiving and delivering the component 20 to be inspected from/to the transparent flange, and a plurality of imaging cameras C1, C2, ..., for imaging the component 20 to be inspected. A plurality of guide members G are substantially spirally arranged on an upper surface T1a of the rotary table D1 and an upper surface T2a of the transparent flange to receive and deliver the component 20 to be inspected from/to the transparent flange. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an appearance inspection apparatus for a part that is imaged by an imaging camera while conveying the part to be inspected to the outer periphery of a rotary table.

  Electronic devices such as portable information terminals and digital cameras have been made smaller and thinner by mounting a large number of polyhedral-shaped components such as chip-type electronic components. With high-density mounting, the appearance characteristics (such as dimensions, shape, and the presence or absence of scratches) of the above parts (also called workpieces) are becoming more and more important, and appearance inspections for quality assurance of appearance characteristics are becoming essential. For example, in the case of a chip-type LED, it is difficult to perform an optical characteristic inspection before mounting, and these appearance inspections are considered essential for quality control. Hereinafter, in this specification, these parts to be inspected are generally described as workpieces. The workpiece manufactured in the manufacturing process is supplied to an appearance inspection apparatus, captured by a plurality of imaging cameras, and the quality of the workpiece is determined by taking the obtained imaging data into a determination circuit such as a personal computer and processing the signal, The defective workpiece determined as defective by the defective workpiece removing means arranged in the appearance inspection apparatus is removed, and only the non-defective workpiece determined as non-defective is supplied to the next process. As the next process, there are a mounting process for mounting a work on a circuit board or the like, and a packaging process for taping or magazine packing.

  A workpiece such as a chip-type electronic component has a polyhedral shape suitable for mounting (for example, a hexahedral shape), and all surfaces of the workpiece (for example, all six surfaces) and edge portions between these surfaces are multifaceted ( (Or multi-angle) may require visual inspection. In addition, the above workpieces include so-called thin workpieces (low profile workpieces) whose thickness (height dimension) is 0.5 mm or less, and careful handling is necessary for handling thin workpieces. However, since the conventional visual inspection apparatus has a gap between the conveyance mechanism, the workpiece may be caught in this gap, resulting in a failure of the apparatus, or a work that has undergone visual inspection is scratched. Inconveniences such as defective parts flowing out to the next process may occur.

  Patent Document 1 (Japanese Patent Laid-Open No. 2008-73626) discloses a workpiece appearance inspection apparatus that performs an appearance inspection of mechanical parts such as nuts. The apparatus described in Patent Document 1 aligns the direction of a workpiece with a parts feeder having a bowl-shaped depression, delivers the workpiece to a ring-shaped inner rotary table, and picks up an image while conveying the workpiece on the inner rotary table. The upper surface of the workpiece is imaged with the camera, and then the workpiece is transferred to the outer rotary table by moving the workpiece upside down by the transfer mechanism, and the workpiece is transferred by the outer rotary table and inverted by the imaging camera. The lower surface of the work is imaged, the quality of the work is judged, and the work is discharged.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-345859) discloses a workpiece appearance inspection apparatus that performs an appearance inspection of a rectangular parallelepiped chip type electronic component such as a chip inductor. The apparatus described in Patent Document 2 aligns the direction of a workpiece with a parts feeder having a bowl-shaped depression, delivers the workpiece to the first rotating disk, and conveys the workpiece on the upper surface of the first rotating disk. The upper and right sides of the workpiece are imaged with an imaging camera, and then the workpiece is transferred to the outer peripheral side of the second rotating disk, and the workpiece is transferred to the outer peripheral side of the second rotating disk. The lower surface and the left side surface of the workpiece are imaged by the imaging camera, the quality of the workpiece is judged, and the workpiece is discharged.

  Patent Document 3 (Japanese Patent Laid-Open No. 2000-343383) discloses a workpiece appearance inspection apparatus that performs appearance inspection of a pressed part such as a coin. The apparatus described in Patent Document 3 aligns the direction of a workpiece with a linear component conveyor, and then delivers the workpiece to a transparent hard material rotary table with a protruding means, while conveying the workpiece with the rotary table. The upper surface of the work is imaged by the imaging camera, the quality of the work is judged, and the work is discharged.

  Patent Document 4 (Japanese Patent Application Laid-Open No. 2006-242952) discloses a work appearance inspection apparatus for performing an appearance inspection of a chip-type electronic component such as a multilayer ceramic capacitor. The apparatus described in Patent Document 4 aligns the direction of a workpiece with a parts feeder having a bowl-shaped depression, and then places the workpiece on a glass turntable via a component conveyance guide in which linear line grooves are formed. The four imaging cameras are used to pick up images on the top, bottom, left, and right sides of the workpiece while conveying the workpiece on the rotary table, and the workpiece is judged to be acceptable and discharged.

  Patent Document 5 (Japanese Patent Laid-Open No. 2008-105811) discloses a workpiece appearance inspection apparatus that performs an appearance inspection of an electronic component such as an IC chip. The apparatus described in Patent Document 5 aligns the direction of a workpiece with a parts feeder having a bowl-shaped depression, and the workpiece is placed on a rotary table having a ring-shaped flange disposed on the outer periphery of the parts feeder by a delivery disk. Then, the workpiece is delivered to the linear part conveyance guide, the workpiece is conveyed by three rotating disks arranged on the lower surface side of the component conveying guide, and then the workpiece is delivered to the transparent glass rotating disk. Then, while conveying the workpiece with a transparent rotating disk made of glass, the four imaging cameras pick up images of the upper, lower, left and right sides of the workpiece, determine whether the workpiece is good or bad, and discharge the workpiece.

JP 2008-073626 A JP 2004-345859 A JP 2000-343383 A JP 2006-242952 A JP 2008-105811 A

  In the work manufacturing inspection process, there is an increasing demand for miniaturization of parts appearance inspection apparatuses. However, simply downsizing the device causes various inconveniences. For example, there is a risk of damaging the work when the work is transported (Patent Documents 1, 3, etc.), and inconvenience that only a predetermined size work can be inspected with a rectangular parallelepiped with a limited shape (Patent Documents 2, 4 etc.) ), Where there is a problem that a space for placing the imaging camera cannot be obtained when imaging 4 to 6 surfaces of the workpiece (Patent Document 4 etc.), and the contour of the workpiece to be imaged due to the continuous workpiece and workpiece. If a fault becomes unclear or a misjudgment occurs due to imaging of a workpiece following the workpiece to be imaged, the meaning of the inspection will be lost. Moreover, in order to image a workpiece in a multifaceted (multi-angle) manner, it is necessary to lengthen the workpiece conveyance path, but the size of the entire apparatus becomes large.

  On the other hand, the work itself is becoming smaller (thinner), but with conventional devices, when handling a small (thin) work, the work is placed in the gap generated at the work delivery point in the visual inspection device. It is easy to cause problems such as equipment failure, and the workpiece size that can be handled by the visual inspection device is thick workpiece with a certain height dimension (thickness dimension). The actual situation is that it is limited to workpieces that exceed the size of the workpiece.

  Therefore, an object of the present invention is to stably convey the device regardless of the type or size of the part to be inspected while greatly reducing the size of the apparatus, and to obtain multi-angle imaging (four or more surfaces in the case of a rectangular parallelepiped shape). An object of the present invention is to provide a part appearance inspection apparatus capable of performing imaging.

  The component appearance inspection apparatus according to the present invention includes an inner rotary table in which a recessed portion having a predetermined shape into which a component to be inspected is placed, an outer rotary table disposed on the outer periphery of the inner rotary table, and an outer rotation. A transparent collar provided integrally on the outer periphery of the table, delivery means for delivering the part to be inspected to the transparent collar, and a plurality of imaging cameras for imaging the part to be inspected, The upper surface of the collar part and the upper surface of the inner rotary table have the same height, the inner peripheral speed of the transparent collar part is set to be higher than the outer peripheral speed of the inner rotary table, and the transfer means is depressed. The part to be inspected put in the part is taken out and transported to the transparent collar by the rotation of the inner rotary table and the rotation of the outer rotary table, and the part to be inspected is located on the upper surface of the transparent collar Transparent underside of the bottom Through it characterized by imaging.

  According to the present invention, the inner peripheral speed of the transparent collar is set to be higher than the outer peripheral speed of the inner rotary table, so that the inner rotary table is Since the interval between the workpieces to be transported when moving to the transparent collar is reliably opened by the speed increase obtained by subtracting the outer peripheral speed, only the workpiece to be imaged with a sense of the workpiece to be imaged and the subsequent workpiece is opened. Images can be taken with clear outlines. Examples of the transparent collar include a glass collar and a resin collar. The imaging camera is, for example, arranged upward with a space just below a transparent collar.

  The present invention is characterized in that the delivery means is a guide member arranged in a substantially arc shape or a substantially spiral shape on the upper surface of the inner rotary table and / or the upper surface of the transparent collar.

According to the present invention, a workpiece can be stably conveyed even at a long distance. That is, even if the diameter of the rotary table is small, the workpiece conveying distance can be increased by the substantially arc-shaped or substantially spiral guide member, and the workpiece having a predetermined imaging posture is imaged. Can do.
The guide member may be a guide member connected in a substantially arc shape or a spiral shape, or may be a guide member arranged in a substantially arc shape or a spiral shape by a plurality of guide members.

The present invention is characterized in that the guide member is disposed across the upper surface of the inner rotary table and the upper surface of the outer rotary table.
According to the present invention, since the workpiece is transported along the guide member, the workpiece does not bite or crawl into the gap between the inner rotary table and the outer rotary table, and the orientation does not change.

The present invention includes an urging unit that presses the guide member against the upper surface of the inner rotary table and / or the upper surface of the transparent collar portion to ground the guide member.
According to the present invention, since the guide member is prevented from being lifted by the rotation of the rotary table, it is possible to prevent a situation in which a gap that bites or creeps when a workpiece passes is generated. The urging means may be an urging means for pressing and grounding one guide member connected in a substantially arc shape or a substantially spiral shape at a plurality of locations. It may be a force means.

According to the present invention, a determination circuit for determining an inspection component captured by capturing image data from the imaging camera and an inspection component determined by receiving a determination signal from the determination circuit are discharged to corresponding discharge ports, respectively. And a plurality of discharge ports. The picked-up inspection parts are stratified and discharged to the corresponding discharge ports.
According to the present invention, it is possible to inspect and eject the parts to be inspected by rotating and conveying a plurality of rotary tables arranged on concentric circles.

  According to the present invention, the part to be inspected (work) put into the recess of the predetermined shape of the rotary table is taken out by the transfer means, and is conveyed to the outer flange by the rotation of the rotary table, and the imaging camera Is imaged through a transparent collar. Then, the inspected parts determined by the determination circuit and determined by the protruding means are respectively ejected to the corresponding discharge ports and discharged. Therefore, the conventional supply means such as a parts feeder and a hopper are integrated into the rotary table so that the apparatus can be greatly reduced in size.

  According to the present invention, the inner peripheral speed of the transparent collar is set to a rotational speed faster than the outer peripheral speed of the inner rotary table, so that the inner rotation from the inner peripheral speed of the transparent collar is performed. Since the increase in speed obtained by subtracting the outer peripheral speed of the table ensures the space between the workpieces to be transported when moving to the transparent collar, the workpiece to be imaged with a sense of the workpiece to be imaged and the subsequent workpieces being opened. It is possible to image only with a clear outline. Further, by arranging a plurality of the rotary tables concentrically, or by arranging the guide member in a substantially arc shape or a substantially spiral shape, the conveyance path of the work necessary for imaging is lengthened, and the lower surface of the guide member is By providing an urging means that presses against the upper surface of the inner rotary table and the upper surface of the transparent collar, it creates a gap that bites or crawls when the workpiece passes through the rotating rotary table. The workpiece can be transported stably and smoothly.

  Therefore, according to the present invention, it is possible to inspect all surfaces (for example, all six surfaces) of the workpiece and the edge portions of these surfaces in a multi-faceted (or multi-angle) manner while being a compact appearance inspection apparatus. A component visual inspection apparatus is realized.

It is a perspective view which shows the external appearance inspection apparatus of the components of 1st Embodiment to which this invention is applied. It is a side view of the external appearance inspection apparatus of the said embodiment. It is an AA line sectional view of the appearance inspection device of the above-mentioned embodiment. It is a front view which shows the principal part of the external appearance inspection apparatus of the said embodiment. (A) is a rear view of the guide member of the appearance inspection apparatus of the said embodiment, (b) is a front view which shows the state which attached the guide member to the positioning member, (c) is the AA sectional view. FIG. It is a perspective view which shows the external appearance inspection apparatus of the components of 2nd Embodiment to which this invention is applied. It is a front view which shows the arrangement structure of the rotary table of the external appearance inspection apparatus which concerns on this invention. It is a perspective view which illustrates a to-be-inspected component.

(Inspected part form)
FIG. 8 is a perspective view showing an example of a polyhedral workpiece 20 (21, 22, 23, 24) subjected to appearance inspection by the appearance inspection apparatus according to the present invention. Reference numeral 20H represents the height of the workpiece 20, reference numeral 20W represents the width of the workpiece 20, and reference numeral 20L represents the total length of the workpiece 20. Reference numeral 20 a represents the upper surface of the workpiece 20, and reference numeral 20 c represents the lower surface (mounting surface) of the workpiece 20. A workpiece 21 shown in FIG. 8A has a shape in which a convex portion is formed on a rectangular component typified by a mounting LED. As dimensions of the mounting type LED 21, for example, a component in which 20H is 0.2 mm, 20W is 0.8 mm, and 20L is 1.6 mm is known. The workpiece 22 shown in FIG. 8B has a shape in which substantially cylindrical legs are attached to the four corners of a rectangular parallelepiped represented by a chip coil. A workpiece 23 shown in FIG. 8C has a shape having a plurality of recesses on both sides of a rectangular parallelepiped represented by a chip IC. A workpiece 24 shown in FIG. 8D has a rectangular parallelepiped shape represented by a chip capacitor. As the dimensions of the chip capacitor 24, for example, a component in which 20H is 0.5 mm, 20W is 0.5 mm, and 20L is 1.0 mm is known.

  A general mounting-type LED 21 has a lens surface 20a made of resin, and its shape is small, so that it is difficult to inspect electrical characteristics before mounting, but a work with a scratch on the lens surface 20a is used as a substrate. Since mounting results in a defective board, it is considered essential to have an appearance inspection before mounting. In addition, as for electronic components in general, it is preferable to perform an appearance inspection before mounting in order to increase the yield after mounting.

(First embodiment)
FIG. 1 is a perspective view of a part appearance inspection apparatus 1a according to a first embodiment to which the present invention is applied as viewed from the upper right side. 2 is a side view of the appearance inspection apparatus 1a, FIG. 3 is a cross-sectional view taken along line AA of the appearance inspection apparatus 1a, and FIG. 4 is a front view showing a main part of the appearance inspection apparatus 1a.
The component appearance inspection apparatus 1 of the present embodiment has a shallow plate shape integrally formed so that the outer periphery of the hollow portion K1 and the hollow portion K1 are flat in a donut shape near the center, and the inner side rotates horizontally. Holding the inner rotary table D1 by the mortar-shaped recess K2, and the outer rotary table D2 horizontally rotating independently of the inner rotary table D1, and the outer periphery of the recess K2 is a plane T2a And a transparent collar T2 provided on the outer periphery of the outer rotary table D2 (FIGS. 2 and 3). The upper surface T1a of the inner turntable D1 and the upper surface T2a of the transparent flange T2 are set at the same height to form a flat portion, and each serves as a transfer surface for the workpiece 20.

A rotary shaft D1k connected and fixed to the center of the inner rotary table D1 passes through the center of the base P1 so as to be rotatable through a bearing disposed on the base P1 fixed integrally on the upper side of the housing plate P. The coupling is connected to the drive shaft of the drive means (drive motor) M1 attached and supported on the lower side of the casing plate P (FIG. 3).
The outer rotary table D2 is rotatably installed on the base P1 via bearings disposed on the outer peripheral side surface of the base P1, and a pulley (large pulley) integrally formed below the outer rotary table D2. A pulley (small pulley) connected and fixed above the drive shaft of the drive means (drive motor) M2 attached and supported on the lower side of the housing plate P is belt-connected by the belt B (FIG. 2). By this belt connection, it is easy to rotate the outer rotary table D2 even with the driving motor M2 having a small driving force.

The workpiece 20 is moved by the rotation of the rotary tables D1 and D2 while being placed on the transport surfaces T1a and T2a. For this reason, the rotational speeds of the rotary tables D1 and D2 are set so that the centrifugal force applied to the workpiece 20 by the rotation of the rotary tables D1 and D2 becomes smaller than the frictional force between the workpiece 20 and the conveying surfaces T1a and T2a.
The outer periphery of the inner rotary table D1 and the inner periphery of the transparent collar T2 are arranged close to each other (FIG. 3), and the inner peripheral speed V21 of the transparent collar T2 is greater than the outer peripheral speed V12 of the inner rotary table D1. Is set to a high rotational speed (V21> V12).
That is, the interval between the workpieces 20 to be transported when moving to the transparent collar T2 can be surely opened by the speed increase obtained by subtracting the outer circumferential speed V12 of the rotary table D1 from the inner circumferential speed V21 of the collar T2. The outline of the workpiece 20 to be imaged can be clearly projected, or the workpiece 20 to be imaged can be projected alone.

  The inner turntable D1 and the outer turntable D2 are made of metal such as stainless steel or aluminum. The transparent collar T2 is made of glass. The reason why the transparent collar T2 is made of glass is to obtain high transparency while ensuring strength. The upper surface of the outer rotary table D2 and the lower surface of the transparent flange T2 are bonded by an adhesive, and are screwed from the lower side of the outer rotary table D2 to be integrally formed.

The upper surface (work transfer surface) T1a of the inner turntable D1 and the upper surface (work transfer surface) T2a of the transparent flange T2 are set to the same height, and the gap y1 between the work transfer surfaces T1a and T2a is 0.2 mm. Set to: This is because the workpiece 20 is smoothly conveyed from the workpiece conveyance surface T1a to the workpiece conveyance surface T2a without rolling.
In the present embodiment, the outer rotary table D2 is supported in a state of protruding upward from the housing plate P (FIG. 2). This is to prevent the casing plate P from interfering with photographing when the workpiece 20 is imaged in a multifaceted (multi-angle) manner with the imaging cameras C1, C2, C3, C4, and C5. In particular, it is possible to give a margin to the arrangement of the imaging camera C2 that images the lower surface 20c of the workpiece 20 from below through the transparent flange T2.

  A ring-shaped support member E for supporting the positioning member L is arranged above the rotary tables D1 and D2, and is installed on the upper surface of the housing plate P by three legs Ej attached to the support member E. (FIG. 1). The ring-shaped support member E is arranged concentrically with the rotary tables D1 and D2, and the inner periphery of the support member E is set larger than the outer periphery of the recess K1. This is because the guide member G is easily arranged. And the outer periphery of the supporting member E is set smaller than the inner periphery of the transparent collar part T2. This is to prevent the support member E from interfering with the shooting when the imaging camera C1 images the upper surface 20a of the workpiece 20 or when the imaging camera C2 images the lower surface 20c of the workpiece 20. . In FIG. 1 and FIG. 2 and the like, for convenience of explanation, a protective cover for protecting the conveyance path of the workpiece 20 and its periphery is not shown. However, in actual operation, the protective cover is appropriately disposed. .

  Reference symbol R is a supply member (also called a hopper) for supplying the workpiece 20 to the donut-shaped depression K1. The supply member R includes a cylindrical container R1 in which a spiral workpiece conveying groove is formed on the inner peripheral side surface of the cylindrical container R1, a drive motor M3 connected to a roller that rotates in contact with the outer peripheral side surface of the cylindrical container R1, A semi-cylindrical cradle R2 that receives the outer peripheral side surface of the cylindrical container R1 and a workpiece 20 that is taken out from the opening of the cylindrical container R1 to slide down toward the donut-shaped depression K1 at a predetermined angle obliquely downward. It consists of the facing shooter R3 (FIG. 1). And in order to prevent the workpiece | work 20 from jumping out at once, the opening part of cylindrical container R1 has faced diagonally upward at the predetermined angle.

  The procedure for supplying the workpiece 20 to the indented portion K1 is as follows. First, a predetermined amount of the workpiece 20 is put into the cylindrical container R1 and set on the receiving tray R2. When the roller of the drive motor R3 is rotated, the cylindrical container R1 rotates in the circumferential direction, and the workpiece 20 advances while vibrating along the conveyance groove formed in a spiral shape inside the cylindrical container R1. And the workpiece | work 20 taken out from the opening part of cylindrical container R1 slides down from shooter R3, and lands on the predetermined place of the hollow part K1. As a method of supplying the workpiece 20 to the hollow portion K1, in addition to the above method, a method of supplying a bulk stuffing container with a shooter while slightly vibrating, a method of directly placing a predetermined amount of workpieces in a batch type, and a small parts feeder And a continuous supply method.

  In the present embodiment, when the inner turntable D1 rotates clockwise (in the direction of the arrow cw in FIG. 1), the workpiece 20 that has landed at a predetermined location of the recess K1 moves clockwise, and the forward position of the transfer means F It becomes. The delivery means of the present embodiment is an air discharge member F1, which moves the workpiece 20 in the outer peripheral direction of the depression K1 by air discharge, and the workpiece 20 is located at the position of the guide member G1 arranged facing the air discharge member F1. Moving. By using the air discharge member F1 as the delivery means, the loaded work 20 is moved to the position of the guide member G1 without contact.

FIG. 5A is a rear view of the guide member of the appearance inspection apparatus of the present embodiment, FIG. 5B is a front view showing a state in which the guide member is attached to the positioning member, and FIG. It is the AA sectional view.
The guide member G of the present embodiment is a plastic thin plate, the lower edge Gk of one side surface Gd of the guide member G is chamfered, and the lower side of the opposite side surface Gb has an edge. Specific materials for the guide member G include polyacetal, nylon, polycarbonate, polyethylene, fluororesin compound and the like. Since the lower edge Gk of one side Gd of the guide member G is chamfered, the ground contact area between the lower surface Ga of the guide member G and the work transport surfaces T1a and T2a can be reduced, and even if the pressing force is small. It can be reliably grounded. On the other hand, since there is an edge below the opposite side surface Gb, the workpiece 20 can be smoothly conveyed along the side surface Gb of the guide member G. Moreover, it is good also as the guide member G for returning the direction which the direction 20 shifted and overlapped in the middle of conveyance from the hollow part K1 to the transparent collar part T2 to the hollow part K1.

  The biasing means of the present embodiment is a compression spring Lspr that presses the upper surface Gc of the guide member G and is built in the positioning member L (FIG. 5C). The positioning member L has a U-shaped grip portion in a side view, and the support pin Lv is in an elliptical shape of the guide member G with the lower surface of the built-in compression spring Lspr in contact with the upper surface Gc of the guide member G. The guide member G is held up and down by being inserted through the through hole Gr.

According to this embodiment, even when the rotary tables D1 and D2 rotate at a high speed, the lower surface Ga of the guide member G arranged at a predetermined position can be grounded, and a gap is formed between the workpiece transfer surfaces T1a and T2a. Prevent it from happening.
For example, even if one guide member G is a long guide member G having a substantially arc shape or a substantially spiral shape, the guide member G can be pressed and grounded by compression springs Lspr arranged at a plurality of locations, so that the lower surface Ga of the guide member G It is easy to make the pressing force with the workpiece transfer surfaces T1a and T2a constant. The workpiece transfer surfaces T1a and T2a are both flat and set to the same height.

  The front view which shows the principal part of the external appearance inspection apparatus 1a of this embodiment is shown in FIG. In order to show the arrangement relationship between the rotary tables D1 and D2 and the plurality of guide members G in an easy-to-understand manner, constituent members such as the support member E are omitted in FIG. The guide members G1, G2, G3, G4, and G5 are disposed at predetermined positions so that the workpiece 20 forms a conveyance path that draws a substantially arc-shaped or substantially helical relaxation curve in a clockwise direction (FIG. 4).

  The conveyance procedure of the workpiece 20 will be described below. First, the workpiece 20 landed at a predetermined position of the donut-shaped depression K1 by the supply member R shown in FIG. 1 is transported by the inner rotary table D1 that rotates clockwise (in the direction of the arrow cw), and forward of the air discharge member F1. Position. The guide member G1 has a shape in which the vicinity of the inner periphery of the flat surface T1a on the outer periphery of the depression K1 is a start end G11, and the guide member G1 crosses substantially linearly from the start end G11 to the vicinity of the outer periphery of the plane T1a. The member G1 is arranged in a substantially arc shape so as to form an end G12 (FIG. 4). That is, the guide member G1 is disposed so as to face the air discharge member F1 and surround the work 20, and the work 20 sent out by air discharge from the air discharge member F1 is received. Then, the workpiece 20 sent out by the air discharge member F1 moves along the side surfaces (G1b, G4b, etc.) of the guide members G1, G2, G3, G4 by the rotation of the inner rotary table D1, and moves the transport track on the plane T1a. Is transported from the vicinity of the outer periphery to the vicinity of the inner periphery of the plane T1a while the trajectory is corrected.

  Reference sign Q is a height gauge for checking the overlap of a plurality of workpieces 20, and is arranged on the workpiece conveyance surface T1a with a predetermined gap in the height direction. In the present embodiment, the height gauge Q is arranged at an intermediate position of the work conveyance path composed of the guide member G3 and the guide member G4, and the work 20 passes directly below the guide member G4 (FIG. 4). The height gauge Q is set to a height that allows one workpiece 20 to pass through. However, when two workpieces 20 are overlapped, the lower workpiece 20 passes, but since the height gauge Q blocks the passage of the workpiece 20 placed thereon, the workpiece 20 placed thereon cannot pass. , It will be returned to the depression K1. For example, if the height 20H of the workpiece 20 is 0.2 mm, the gap between the height gauge Q and the conveyance surface T1a may be set so as not to pass the defective workpiece 20 having a height 20H exceeding 0.2 mm. Is possible.

  The workpiece 20 that has passed through the height gauge Q is conveyed along the guide member G4. At the terminal end G42 of the guide member G4, the distance between the side surface G42 of the guide member G4 and the inner periphery of the transport surface T1a is set to a size that allows the workpieces 20 to be transported in one row. This is to prevent the workpieces 20 from being conveyed in a plurality of rows and return the excess workpieces 20 to the recesses K1.

  The guide member G5 is disposed across the transport surface T1a and the transport surface T2a, and delivers the workpiece 20 from the transport surface T1a to the transport surface T2a. The workpieces 20 aligned in one row move away from the guide member G4 and move along the side surface G5b of the guide member G5, and are transferred from the transport surface T1a to the transport surface T2a. The starting end G51 of the guide member G5 is a position in contact with the inner periphery of the transport surface T1a. There is a gap y1 between the outer periphery of the transport surface T1a and the inner periphery of the transport surface T2a. According to this embodiment, since the workpiece 20 is conveyed along the guide member G5, the workpiece 20 does not bite into the gap y1 and does not change its orientation.

  The rotary tables D1 and D2 rotate horizontally, and the inner peripheral speed V21 of the transparent collar T2 is set to a higher rotational speed than the outer peripheral speed V12 of the inner rotary table D1 (V21> V12). When the workpiece 20 is transferred from the conveying surface T1a to the conveying surface T2a, the workpiece is increased by a speed increase obtained by subtracting the outer peripheral velocity V12 of the inner rotary table D1 from the inner peripheral velocity V21 of the flange portion T2 of the outer rotary table D2. Since the conveyance speed of 20 becomes fast, the space | interval of the workpiece | work 20 which carried out alignment conveyance is fully opened. For this reason, the outline of the workpiece | work 20 imaged with an imaging camera can be projected clearly, and the situation where the next continuous workpiece | work is reflected simultaneously is prevented. And the workpiece | work 20 which left | separated from the terminal end G52 of the guide member G5 is conveyed on the conveyance surface T2a of the transparent collar part T2 by rotation of the outer turntable D2.

  In the present embodiment, since the workpiece 20 located on the upper surface T2a of the transparent collar T2 is imaged in a multifaceted (multiangle) manner, the position away from the guide member G5 (the position opposite to the discharge port S in FIG. 4). ) Is provided with a plurality of CCD cameras C (C1, C2,..., C6). As the imaging camera C, a CCD camera, a line camera, a fiberscope camera, or the like is appropriately used depending on the apparatus configuration.

  As the arrangement configuration of the imaging camera C, the imaging camera C1 is arranged in a 90 ° downward posture with a space above the transport surface T2a of the transparent collar T2, and the upper surface 20a of the workpiece 20 is imaged. An imaging camera C2 is arranged in a 90 degree upward posture with a space below the conveyance surface T2a of T2, and the lower surface 20c of the workpiece 20 is imaged through a transparent collar T2 made of glass. An imaging camera C3 is arranged in a left-facing posture on the right hand (transverse direction side of the workpiece 20) of the transparent collar T2, and images the front surface (surface in the progression direction) of the workpiece 20, and the left hand (workpiece) of the transparent collar T2 The imaging camera C4 is arranged in a right-facing posture on the opposite side to the traveling direction of 20 and images the rear surface of the workpiece 20 (the surface opposite to the traveling direction). An imaging camera C5 is arranged on the outside of the transparent collar T2 in an inward-facing posture, and images the left side surface of the workpiece 20 in the traveling direction. Inside the transparent collar T2, a mirror U is arranged in an outward and approximately 45 ° obliquely upward posture, reflects the right side of the moving direction of the workpiece 20, and faces inward with a space facing the mirror U. Then, the imaging camera C6 is arranged at an obliquely downward posture of about 45 ° to capture the image of the work 20 reflected in the mirror U.

  In the present embodiment, six surfaces of the workpiece 20 are imaged by the six imaging cameras C (C1, C2,..., C6). The arrangement of the imaging camera C can be changed as appropriate. For example, the edge between the front surface and the side surface of the workpiece 20 and the edge between the rear surface and the side surface of the workpiece 20 can be imaged from multiple angles.

  Imaging data of the workpiece 20 imaged by the imaging camera C is taken into the determination circuit (determination personal computer) 8, and the determination personal computer 8 performs pass / fail determination and rank determination. And the workpiece | work 20 determined by the protrusion means J is protruded, and is discharged | emitted to the discharge port (inlet of the layered container) S distribute | arranged to the predetermined position of the outer side of the transparent collar T2. In order to correspond to each rank of the work 20, a plurality of discharge ports (inlet of the layered container) S are arranged. Examples of the projecting means J include a projecting rod that is operated by an air cylinder or an electromagnetic cylinder, air discharged from an air tube, and the like.

The stratified container S of the present embodiment has a configuration in which a shooter that is inclined obliquely downward to slide the work 20 and a bulk container for bulk supply of the work 20 in the next process are connected (FIG. 1). Figure 2). For example, if the parts to be inspected (work) 20 are classified into A rank (good product), B rank (defective product), and C rank (retest product), the A rank work 20 is first ejected by the ejecting means J11. Enter the stratified container S1. Next, the B rank workpiece 20 is ejected by the projecting means J12 and enters the stratified container S2. The C-rank workpiece 20 enters the stratified container S3 along the guide member G6.
In addition to the above, the structure in which the workpiece 20 protruded from the protrusion means J is packed in a magazine through a linear guide connected to the shooter, or the assembly process or the like is directly performed via the linear guide connected to the shooter. It is also possible to adopt a configuration for sending to the process. The stratification (ranking) can be classified from two types to many types as necessary, and is not limited to the embodiment shown in FIG.

  Reference numeral B denotes a control display panel, on which a power switch, various control buttons, a liquid crystal display panel, and the like are arranged (FIG. 1). The liquid crystal display panel serves as both a display panel and a touch panel, and various control conditions can be directly input on the screen. When the appearance inspection apparatus 1a is started, the workpieces 20 that have entered the respective stratified containers S are counted by a counting sensor attached near the entrance of the stratified containers S, and the counting results are displayed on the liquid crystal display panel. The

  The appearance inspection apparatus 1 of this embodiment can lengthen the conveyance path of the workpiece | work required for imaging by arrange | positioning several rotation tables D1, D2 concentrically, and although it is a small appearance inspection apparatus, all the surfaces of a workpiece | work It is easy to visually inspect (for example, all six surfaces) and each edge portion between these surfaces in a multifaceted (or multiangle) manner.

(Second Embodiment)
FIG. 6 shows a perspective view of a part appearance inspection apparatus 11 according to a second embodiment to which the present invention is applied as viewed from the upper right side. The present embodiment is different from the above-described appearance inspection apparatus 1 in that the delivery means F is a delivery rotary disk F2. Other than that is substantially the same, and the description thereof will be omitted as appropriate.

  The transfer rotating disk F2 for transferring the workpiece 20 supplied from the supply member R to the outer periphery of the depression K1 is also called a brush roller, and a wire (brush) having a thin wire diameter is planted along the outer periphery of the rotating disk. It is included. Examples of the brush material include resin, metal, and animal hair such as pigs and horses. From the viewpoint of preventing static electricity, a brush that has been subjected to antistatic treatment such as metal or metal-coated resin is preferable. The brush that has been implanted has a role of a cushion that relaxes the impact applied to the workpiece 20 because it is difficult to form a gap by bending with the conveying surface T1a.

  The drive shaft of the drive motor M4 is connected to the central axis of the rotary disk of the transfer rotary disk F2, and is rotated by the drive motor M4 (FIG. 6). The rotating disk of the transfer rotating disk F2 is disposed so as to be obliquely upward with respect to the outer peripheral plane T1a of the recess K1. The rotating direction of the transfer rotating disk F2 is the same as the rotating direction of the first rotating disk D1, and in the present embodiment, it rotates clockwise (in the direction of the arrow cw).

  The transfer rotating disk F2 is not limited to the above-mentioned form, and may be a resin rotating disk having no brush and a relatively low elastic modulus, and a groove for preventing slip is provided near the outer periphery of the rotating disk. It may be a rotating disk. More specifically, examples of the resin having a relatively low elastic modulus include polyacetal, nylon, polycarbonate, polyethylene, and a fluororesin compound.

  The workpiece 20 landed at a predetermined position of the donut-shaped depression K1 by the supply member R is conveyed by the inner rotary table D1 that rotates clockwise, and becomes the position of the transfer rotary disk F2. Then, the workpiece 20 is lifted up by the clockwise rotation of the transfer rotating disk F2 and transferred to the transport surface T1a of the inner rotary table D1.

  FIG. 7 is a front view showing the arrangement of the rotary table according to the present invention. In FIG. 7A, a work transfer surface T2a composed of a transparent collar of the outer turntable D2 is arranged on the outer periphery of the work transfer surface T1a of the inner turntable D1, and the first embodiment and the above-described first embodiment. This corresponds to the second embodiment. In FIG. 7B, the work transfer surface T2a of the second turntable D2 is arranged on the outer periphery of the work transfer surface T1a of the first turntable D1, and the third turntable D3 is set on the outer periphery of the work transfer surface T2a. A work conveyance surface T3a made of a transparent collar is disposed.

  In the example shown in FIG. 7B, the outer periphery of the transport surface T1a and the inner periphery of the transport surface T2a are disposed close to each other, and the outer periphery of the transport surface T2a and the inner periphery of the transport surface T3a are disposed close to each other. . The height of the conveyance surface T1a, the height of the conveyance surface T2a, and the height of the conveyance surface T3a are the same height. All of the rotary tables D1, D2, and D3 rotate horizontally. The inner peripheral speed V21 of the transport surface T2a is set to a rotational speed faster than the outer peripheral speed V12 of the transport surface T1a (V21> V12). Further, the inner peripheral speed V31 of the transport surface T3a is set to a rotational speed faster than the outer peripheral speed V22 of the transport surface T2a (V31> V22).

  As described above, the present invention is not limited to the embodiment described above. For example, the imaging camera C can be additionally arranged so that not only the entire surface (for example, six surfaces) of the workpiece 20 but also the edge portions (for example, twelve edges) between these surfaces can be inspected at multiple angles. . In some cases, the imaging camera C has the minimum necessary configuration, ie, a lower surface 20c and an upper surface 20a of the workpiece 20. The rotating disk D1 (D2, D3) has no problem even if it is counterclockwise. The arrangement of the guide member G is not limited to the above-described embodiment, and the guide member G only needs to be divided and arranged in two or more guide members. It may be omitted. Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

1,11 parts visual inspection equipment,
20 Parts to be inspected (work),
D1 rotary table (inner rotary table),
D2 rotary table (outside rotary table),
K1 hollow (doughnut-shaped hollow),
K2 recess (concave recess recessed in a mortar shape),
T2 buttocks (transparent buttocks),
T1a, T2a Work transfer surface (plane),
G guide member (a plurality of guide members),
L positioning member,
Ls biasing means (compression spring),
P housing plate,
Q Height gauge,
R supply member (hopper),
F delivery means,
F1 air discharge member,
F2 Rotating disc for delivery,
J sticking means,
S outlet (layered container),
8 Judgment circuit (PC for judgment),
y1 gap (gap between workpiece transfer surface and workpiece transfer surface),
M1, M2, M3, M4 drive means (drive motor),
C, C1, C2, C3, C4, C5, C6 imaging camera

Claims (5)

Provided integrally with the inner turntable formed with a recessed portion of a predetermined shape into which parts to be inspected are formed, the outer turntable disposed on the outer periphery of the inner turntable, and the outer periphery of the outer turntable. A transparent collar, delivery means for delivering the part to be inspected to the transparent collar, and a plurality of imaging cameras for imaging the part to be inspected,
The upper surface of the transparent collar part and the upper surface of the inner rotary table have the same height, and the inner peripheral speed of the transparent collar part is set to a higher rotational speed than the outer peripheral speed of the inner rotary table,
The delivery means takes out the part to be inspected put in the recess and conveys it to the transparent collar by the rotation of the inner rotary table and the rotation of the outer rotary table, and the imaging camera is placed on the upper surface of the transparent collar. An apparatus for inspecting appearance of a part, wherein a lower surface of a part to be inspected is imaged through a transparent collar.   2. The component appearance inspection apparatus according to claim 1, wherein the transfer means is a guide member arranged in a substantially arc shape or a substantially spiral shape on the upper surface of the inner rotary table and / or the upper surface of the transparent collar.   The component visual inspection apparatus according to claim 2, wherein the guide member is disposed across the upper surface of the inner rotary table and the upper surface of the outer rotary table.   The component visual inspection apparatus according to claim 2, further comprising an urging unit that presses the guide member against the upper surface of the inner rotary table and / or the upper surface of the transparent flange. A determination circuit for determining an imaged part to be picked up by taking in image data from the imaging camera, and a projecting unit for discharging the part to be inspected determined in response to a determination signal from the determination circuit to a corresponding discharge port; A component visual inspection apparatus according to any one of claims 1 to 4, further comprising a plurality of discharge ports, wherein the imaged inspection parts are stratified and discharged to corresponding discharge ports, respectively. .

Images