Inspection device

Abstract

To provide an inspection device capable of inspecting a greater number of workpieces per unit time.SOLUTION: An inspection device 10 comprises: a rotary table 20 that has an upper surface on which transport paths 231, 241 are formed to align and arrange workpieces along the circumferential direction, and rotates by receiving driving of a rotary drive source 21; a supply unit 30 that sequentially supplies the workpieces to the transport paths 231, 241 of the rotary table 20; and an inspection unit 50 that inspects the workpieces on the transport paths 231, 241 of the rotary table 20. The transport paths 231, 241 of the rotary table 20 are formed concentrically and in plurality on the upper surface of the rotary table 20. By providing the multiple transport paths in this manner, the number of inspections per unit time can be increased without increasing the rotational speed, thereby improving inspection efficiency.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an inspection apparatus for inspecting a workpiece.

Background Art

[0002] Conventionally, as an inspection apparatus for inspecting a workpiece, an inspection apparatus shown in Patent Document 1 is known. This inspection apparatus has a rotary table on which a workpiece is placed on its upper surface, a supply unit for supplying the workpiece to the rotary table, and an inspection unit for inspecting the workpiece on the rotary table. In such an inspection apparatus, the workpiece supplied onto the rotary table by the supply unit is conveyed in the circumferential direction as the rotary table rotates. Thereby, when the workpiece reaches within the inspection range of the inspection unit, the inspection unit inspects the workpiece and is configured to determine whether the workpiece is a good product or a defective product. Such an inspection apparatus that places the workpiece on the rotary table has the advantage that it can inspect any workpiece regardless of its shape as long as it can be placed on the rotary table.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the workpiece is not fixed to the rotary table in the above inspection apparatus, there is a problem that when the rotation speed of the rotary table is increased, the workpiece is displaced due to centrifugal force. For this reason, the inspection speed cannot be improved, there is a limit to the number of workpieces that can be inspected per unit time, and there is a problem that the inspection efficiency is poor.

[0005] Therefore, an object of the present invention is to provide an inspection apparatus that can inspect more workpieces per unit time.

Means for Solving the Problem

[0006] In order to achieve the above object, the present invention provides a rotary table having an upper surface on which a conveyance path for arranging workpieces in alignment along the circumferential direction is formed, and which rotates under the drive of a rotary drive source, a supply unit for sequentially supplying workpieces to the conveyance path of the rotary table, and an inspection unit for inspecting the workpieces on the conveyance path of the rotary table. In the inspection apparatus, the conveyance path of the rotary table is characterized in that a plurality of concentric circles are formed on the upper surface of the rotary table. Further, the rotary table has a lower plate provided with a conveyance path on the radially outer side and an upper plate provided above the lower plate, and it is preferable that the lower plate and the upper plate are each provided with a conveyance path. Further, it is preferable that the supply unit is configured to alternately supply workpieces to the plurality of conveyance paths. Further, the supply unit includes a separation supply means capable of arranging workpieces on the conveyance path, and it is preferable that the separation supply means is configured to supply workpieces to the conveyance path at equal intervals. Further, a control unit for controlling the drive of the rotary table and the separation supply means is provided, and it is preferable that the control unit is configured to be able to control the drive of the separation supply means so that workpieces are supplied from the supply unit to the rotary table each time the rotary table rotates by a predetermined angle. Further, on the conveyance path of the workpieces by the rotary table, an exclusion unit for excluding workpieces determined to be defective from the conveyance path and a discharge unit for discharging workpieces determined to be non-defective are preferably provided on the downstream side of the inspection apparatus. Further, a through hole is formed at the center of the rotary table, and a defective product chute capable of receiving workpieces excluded from the conveyance path provided on the radially inner side is preferably arranged in the through hole.

Advantages of the Invention

[0007] According to the inspection apparatus of the present invention, a plurality of work transfer paths are provided on the rotary table, and since the work can be inspected on each of these plurality of transfer paths, there are advantages such as being able to improve the number of inspections per unit time without increasing the rotational speed of the rotary table. In addition, since the rotary table has a two-stage configuration consisting of a lower plate and an upper plate, there are also advantages such as preventing the work placed on the other plate from interfering with the inspection results when being inspected by the inspection unit. Particularly, when the inspection unit has a camera that photographs the work on the transfer path from the outside in the radial direction of the rotary table, since the rotary table has a two-stage configuration, there are advantages such as making it difficult for the work placed on the other plate to appear in the photographing result. In addition, since the supply unit is configured to alternately supply work to the transfer path on the inner side in the radial direction and the transfer path on the outer side in the radial direction, on the rotary table, the distance between the works is increased, so there are also advantages such as preventing other works from interfering with the inspection results. In addition, since the work can be installed at a predetermined timing by the separation supply means, there are advantages such as being able to separate the work from the next-stage work and improving the inspection accuracy.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0009] Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 10 denotes an inspection apparatus 10 for inspecting the quality of a nut N, which is an example of a workpiece. This inspection apparatus 10 has a rotary table 20 for conveying the nut N and a control unit (not shown) for controlling the drive of the rotary table 20.

[0010] The rotary table 20 has an AC servo motor 21 (hereinafter referred to as a conveyance motor 21), which is a rotary drive source, and a base member 22 that rotates in response to the drive of the conveyance motor 21. An upper plate 23 and a lower plate 24 that rotate integrally with the base member 22 are fixed to the base member 22. As shown by a two-dot chain line in FIG. 1, in a plan view, the conveyance path 231 of the upper plate 23 and the conveyance path 241 of the lower plate 24 are configured to draw concentric circles. Further, the outer diameter of the upper plate 23 is configured to be sufficiently smaller than the conveyance path 241 of the lower plate 24. Furthermore, the base member 22, the upper plate 23, and the lower plate 24 are configured in an annular shape with a through hole 25 formed at the center in a plan view. On the upper surface of the upper plate 23, a mortar-shaped tapered portion 232 that gradually inclines toward the through hole 25 is provided inside the conveyance path 231. The conveyance motor 21 is provided at a position away from the center of the rotary table 20 and is disposed outside the through hole 25.

[0011] Also, on the conveyance paths 231 and 241 of the nut N by the rotary table 20, there are provided a supply unit 30 for supplying the nut N, an alignment unit 40 for aligning the nut N supplied to the supply unit 30, an inspection unit 50 for inspecting the nut N aligned by the alignment unit 40, an elimination unit 60 for eliminating the nut N determined to be defective by the inspection unit 50, and a discharge unit 70 for discharging the nut N determined to be a good product. Note that the above units are arranged on the conveyance path 231 of the upper plate 23 and on the conveyance path 241 of the lower plate 24, and their basic configurations are similar. Therefore, hereinafter, only one of the configurations will be described except for those with different basic configurations.

[0012] The supply unit 30 includes a supply rail 31 for supplying the nut N to the upper plate 23 and the lower plate 24, and a separation supply means 32 provided at the end of the supply rail 31. The supply rail 31 has a support plate 311 arranged to be continuous with the upper surfaces of the upper plate 23 and the lower plate 24, and a fixed rail 312 and a movable rail 313 arranged on the support plate 311. The movable rail 313 is configured to be movable in a direction orthogonal to the fixed rail 312, and is configured to be changeable in width according to the nut N supplied to the fixed rail 312. At the start end of the supply rail 31, a supply device (not shown) for supplying the nut N is continuous, and the supply rail 31 is constantly vibrating under the drive of a vibration drive source (not shown). Therefore, the nut N supplied onto the supply rail 31 by the supply device is vibrated and conveyed along the supply rail 31 toward the rotary table 20.

[0013] On the one hand, the separation and supply means 32 is composed of an AC servo motor 321 which is a rotational drive source (hereinafter referred to as the disk motor 321), a delivery disk 322 that rotates by driving the disk motor 321, and an adjustment disk 324 stacked on the delivery disk 322. A long hole 325 extending in the circumferential direction is formed in the adjustment disk 324, and a fixing screw 326 passes through the long hole 325. Therefore, when the fixing screw 326 is loosened, the adjustment disk 324 can rotate relative to the delivery disk 322, while when the fixing screw 326 is fastened, the delivery disk 322 and the adjustment disk 324 can be fixed. Further, notch grooves are formed in the delivery disk 322 and the adjustment disk 324 at equal intervals in the circumferential direction, and these notch grooves are each configured to be larger than the nut N. Furthermore, a contact member 323 that contacts the nut N is mounted on the upper surface of the delivery disk 322, and this contact member 323 is disposed in the notch groove of the adjustment disk 324. Therefore, by relatively rotating the adjustment disk 324 with respect to the delivery disk 322, it is possible to change the size of the groove portion formed between the contact member 323 mounted on the delivery disk 322 and the adjustment disk 324 as shown in FIGS. 2(a) and 2(b) to be suitable for the size of the nut N.

[0014] Note that the supply units 30 are arranged in a target manner such that the fixed rails 312 face each other. Therefore, when the positions of the movable rail 313 and the separation and supply means 32 are adjusted according to the size of the nut N, they do not move to the supply unit 30 side where they face each other from the fixed rail 312. As a result, it is said that the supply units 30 come into contact with each other due to the position adjustment. Also, as shown in FIG. 1, the supply is performed such that the center of the nut N is located slightly radially outside the transport paths 231 and 241.

[0015] The alignment unit 40 is composed of an alignment member 41 having an arcuate surface and a detection sensor 42 provided downstream of the alignment member 41. The alignment member 41 is arranged such that the arcuate upper surface is positioned inside the rotary table 20 from the nut N installed on the rotary table 20 by the supply unit 30. When the nut N arranged on the rotary table 20 follows the arcuate upper surface, it can move along the conveyance paths 231 and 241 indicated by the two-dot chain line in FIG. 1. The detection sensor 42 is a pair of optical sensors that detect the nut N that has moved onto the conveyance paths 231 and 241 by the alignment member 41. This detection sensor 42 is connected to the control device and is configured to output a detection signal to the control unit when the nut N advancing along the conveyance paths 231 and 241 blocks the detection light. Thereby, the control unit can store the coordinates of the nut N on the rotary table 20.

[0016] The inspection unit 50 has a first inspection unit 51 that inspects the upper surface of the nut N on the rotary table 20 and a second inspection unit 52 that inspects the side surface of the nut N. As shown in FIG. 3(a), the first inspection unit 51 includes an annular ring illumination 511 that irradiates light from above the nut N on the conveyance paths 231 and 241, and an upper camera 512 that is arranged above the ring illumination 511 and photographs the nut N from above. On the other hand, as shown in FIG. 3(b), the second inspection unit 52 includes a backlight 521 that irradiates light from the radially inner side of the nut N on the conveyance paths 231 and 241, a mirror 522 provided on the radially outer side of the backlight 521, and a side camera 523 provided above the mirror 522. The mirror 522 is arranged to reflect the light irradiated from the backlight 521 toward the side camera 523 arranged above. With these structures, the side camera 523 can photograph the nut N reflected in the mirror 522, and the photographing distance of the side camera 523 does not extend in the radial direction, making it possible to miniaturize the device. The photographing results by the upper camera 512 and the side camera 523 are analyzed by the control unit.

[0017] The exclusion unit 60 includes an AC servo motor 61 that is a rotational drive source (hereinafter referred to as the exclusion motor 61), exclusion blades 621 and 622 that rotate upon receiving the drive of the exclusion motor 61, defective product chutes 631 and 632 that drop the nut N excluded from the rotation table 20 by the exclusion blades 621 and 622 to a predetermined defective product box, and an exclusion sensor 64 provided downstream of the exclusion blades 621 and 622. The exclusion blades 621 and 622 are connected to the drive shaft of the exclusion motor 61 and are provided with three blade portions extending radially outward. An exclusion member that abuts against the nut N on the conveyance paths 231 and 241 and ejects the nut N toward the defective product chute side is attached to the tip of this blade portion. The defective product chute 631 of the upper stage plate 23 is provided in the through hole 25 of the rotation table 20 and is configured to guide the nut N to a defective product box provided below the rotation table 20 through the through hole 25. Therefore, as shown in FIG. 4(a), the exclusion blade 621 of the upper stage plate 23 is configured to eject the defective nut N on the conveyance path 231 radially inward. On the other hand, the defective product chute 632 of the lower stage plate 24 is provided on the radially outer side of the lower stage plate 24. For this reason, as shown in FIG. 4(a), the exclusion blade 622 of the lower stage plate 24 is configured to eject the defective nut N on the conveyance path 241 radially outward. The exclusion sensor 64 is a pair of optical sensors that detect the nut N on the conveyance paths 231 and 241 in the same manner as the detection sensor 42, and this exclusion sensor 64 is connected to the control device. When the nut N blocks the detection light of the exclusion sensor 64, the control unit checks whether the nut N has been determined to be a defective product by the inspection unit 50. In the event that the nut N has been determined to be a defective product, the rotation table 20 is reversely driven to convey the nut N below the exclusion blades 621 and 622, and the exclusion motor 61 is driven to perform the exclusion operation by the exclusion unit 60 again.

[0018] The discharge unit 70 includes a count sensor 71 that counts the number of nuts N, a discharge member 72 provided downstream of the count sensor 71, and a good product chute 73 that drops the nuts N discharged from the rotary table 20 onto a predetermined good product box. The count sensor 71 is a pair of optical sensors that detect the nuts N on the transport paths 231 and 241, similar to the detection sensor 42. The count sensor 71 is configured to count the nuts N on the transport paths 231 and 241. The discharge member 72 is a plate member arranged to intersect the transport paths 231 and 241, and is inclined so as to gradually move radially outward in the downstream direction. Therefore, the nuts N that come into contact with the discharge member 72 move along the discharge member 72 to the downstream side and radially outward, and are guided to the good product chute 73. Further, a shutter (not shown) is provided in the good product chute 73. The shutter is configured to operate when the count sensor 71 counts a predetermined number, store the nuts N in the good product chute 73, and not supply them to the good product box. Thereby, it is possible to put only a predetermined number into the good product box. Above the lower plate 24, a sub-chute 74 continuing from the upper plate 23 to the good product chute 73 is provided downstream of the discharge member 72. As shown in FIG. 5, the sub-chute 74 is arranged with a slight gap so as not to contact the upper plate 23 and the lower plate 24. Therefore, the nuts N on the upper plate 23 are discharged onto the sub-chute 74 by the discharge member 72, slide down the sub-chute 74, and are guided to the good product chute 73.

[0019] The control unit is connected to the rotary table 20 and various units, and is configured to be able to control the driving thereof. Further, the conveying motor 21, the disk motor 321, and the discharging motor 61 are provided with encoders (not shown) capable of detecting their rotation angles, and the control unit is configured to be able to detect and control the rotation angles of these motors based on signals from the encoders. For this reason, every time the conveying motor 21 rotates by a predetermined angle, the disk motors 321, 321 are alternately rotationally driven by an angle corresponding to one notch groove, and nuts N are alternately and circumferentially supplied at the same pitch onto the upper plate 23 and the lower plate 24 as shown in FIG. 1. In the present embodiment, the nuts N are configured to be supplied onto the rotary table 20 every time the conveying motor 21 rotates by 10 degrees. Further, when receiving the detection signal from the detection sensor 42, the control unit can calculate the position of the nut N on the rotary table 20 by obtaining the rotation angle of the conveying motor 21 from the encoder of the conveying motor 21.

[0020] Next, the operation of the inspection apparatus 10 configured as described above will be described. First, by driving the supply device, the nuts N are sequentially supplied onto the supply rail 31 from an external supply device. The nuts N supplied to the supply rail 31 move along the supply rail 31 to the separation supply means 32 located at each terminal end, and are sequentially supplied onto the rotary table 20 by the rotation of the separation supply means 32. At this time, the disk motor 321 of the separation supply means 32 and the conveying motor 21 of the rotary table 20 are rotationally driven and controlled by the control unit as described above, and every time the rotary table 20 rotates by a predetermined angle, the nuts N are alternately and equally spaced and supplied to the upper plate 23 and the lower plate 24 respectively. For this reason, it is possible to prevent the nuts N on the rotary table 20 from approaching excessively.

[0021] As described above, the nut N placed on the rotary table 20 is conveyed downstream as the rotary table 20 rotates and abuts against the alignment member 41 of the alignment unit 40. The nut N that abuts against the alignment member 41 is guided radially inward along the arc-shaped upper surface of the alignment member 41 and positioned such that its center is located on the conveyance paths 231 and 241. Thereafter, the nut N is detected by a detection sensor 42 provided downstream of the alignment member 41. At this time, the control unit grasps the position of the nut N on the rotary table 20 based on signals from the detection sensor 42 and the rotary table 20.

[0022] As described above, the nut N whose position has been detected by the control unit passes through the imaging range of the inspection unit 50 provided downstream of the detection sensor 42 as the rotary table 20 rotates. At this time, as described above, the rotation of the rotary table 20 is controlled by the control unit, and the position of the nut N on the rotary table 20 is notified to the control unit by the detection sensor 42. Therefore, when the nut N reaches the imaging range, the control unit activates the first inspection unit 51 and the second inspection unit 52 respectively to image the nut N from above and from the side. These imaging results are analyzed by the control unit to determine whether the imaged nut N is a good product or a defective product. At this time, since the nut N is alternately and equidistantly arranged on the upper plate 23 and the lower plate 24 by the separation and supply means 32, it is possible to prevent the nut N on the other plate or the nut N in the previous or next stage placed on the same plate from being reflected in the imaging result during imaging. Therefore, even if the nut N is arranged in two rows on the upper plate 23 and the lower plate 24, a highly accurate inspection can be performed.

[0023] As described above, the nut N inspected by the inspection unit 50 reaches the rejection unit 60 provided downstream of the inspection unit 50 as the rotary table 20 rotates. At this time, if the nut N has been determined to be a non-defective product by the inspection unit 50, the rejection unit 60 allows the nut N to pass through without driving. On the other hand, if the nut N has been determined to be a defective product, when the nut N reaches below the rejection blades 621, 622, the control unit drives the rejection motor 61. As a result, the rejection members provided at the tips of the rejection blades 621, 622 abut against the nut N, and the nut N is ejected from the conveying paths 231, 241 toward the defective product shoots 631, 632. At this time, since the tapered portion 232 is provided on the upper plate 23, the nut N ejected radially inward from the conveying path 231 slides down the tapered portion 232 toward the defective product shoot 631. As a result, even if there is a gap between the conveying path 231 of the upper plate 23 and the defective product shoot 631, it is not necessary to eject the nut N too strongly, and it is possible to prevent damage to the nut N or the inspection device 10, or the nut N being ejected too strongly from flying out of the inspection device 10 to the outside.

[0024] Also, the nut N that has passed through the rejection blades 621, 622 is detected by a rejection sensor 64 provided downstream of the rejection blades 621, 622. At this time, if the rejection sensor 64 accidentally detects a defective nut N, the control unit temporarily stops the rotary table 20 and drives it in reverse to move the defective nut N below the rejection blades 621, 622 again. After that, the rejection motor 61 is driven again to eject the nut N from the rotary table 20, and then the rotary table 20 is driven forward again. Since it is possible to detect whether the defective nut N has been rejected by the rejection sensor 64 in this way, the mixing of defective nuts N is prevented.

[0025] As described above, the non-defective nuts N that have passed through the exclusion unit 60 reach the discharge unit 70 as the rotary table 20 rotates. After these nuts N are counted by the count sensor 71, they are guided to the non-defective product chute 73 along the discharge member 72. They slide down inside this non-defective product chute 73 and are stored in the non-defective product box. Also, since the count sensor 71 counts the number of non-defective nuts N, when a predetermined number of nuts N are stored in the non-defective product box, the shutter of the non-defective product chute 73 is activated and starts storing the nuts N inside the non-defective product chute 73. As a result, it becomes possible to divide the non-defective nuts N into predetermined numbers. After that, a new non-defective product box is installed and the shutter is opened, so that the nuts N inside the non-defective product chute 73 are stored in the non-defective product box again.

[0026] Since the inspection device 10 configured as described above has two rows of conveying paths 231 and 241 on the rotary table 20, it is possible to increase the number of inspections per unit time without increasing the rotation speed. For this reason, it is possible to prevent the nuts N from being displaced due to the centrifugal force of the rotary table 20. Also, since the nuts N are conveyed in two rows in the radial direction, only one conveying motor 21 is required and it can be manufactured at a relatively low cost, and it can be installed in a narrower space than having two inspection devices 10. Furthermore, since the upper plate 23 and the lower plate 24 are arranged in two levels, upper and lower, when the side camera 523 photographs the nuts N on the upper plate 23, there are advantages such as the nuts N on the lower plate 24 not interfering with the photographing, and the nuts N on the upper plate 23 can be slid down to the non-defective product chute 73 using the sub-chute 74.

[0027] Further, the inspection device 10 can supply the nuts N at equal intervals onto the rotary table 20 by the separation and supply means 32. As a result, the nuts N on the rotary table 20 can be detected by the detection sensor 42 as described above. Consequently, the control unit that receives both the detection signal from the detection sensor 42 and the angle signal of the conveyance motor 21 can individually identify the nuts N. Thereby, after the pass / fail discrimination by the inspection unit 50, the exclusion sensor 64 can detect whether the nuts N determined to be defective remain on the rotary table 20. Since the control unit can individually identify the nuts N in this way and the exclusion sensor 64 can detect exclusion failures, it is possible to prevent the mixing of defective products. Also, since the nuts N are supplied at equal intervals, it is possible to prevent a plurality of nuts N from entering the imaging range, and thus there are advantages such as stable inspection results. Furthermore, since the nuts N and the nuts N in the next stage are prevented from approaching each other excessively as described above, when the defective products are ejected to the defective product shoots 631 and 632 by the exclusion unit 60, the exclusion blades 621 and 622 do not contact the nuts N in the next stage, and failures in the ejection operation do not occur.

[0028] Note that the inspection device 10 according to the present invention is not limited to the above-described one, and various modifications are possible without departing from the spirit of the invention. For example, in the above embodiment, the nuts N on both the upper plate 23 and the lower plate 24 slide down to the same good product chute 73. However, two good product chutes 73 may be provided, and the nuts N on each plate may be guided to different good product chutes 73. By providing two good product chutes 73 in this way, there are advantages such as the ability to simultaneously inspect different nuts N. Also, even if there is some problem in one of the inspection units 50, since the nuts N passing through the upper plate 23 and the nuts N passing through the lower plate 24 do not mix, it is possible to re-inspect only the nuts N on the side where the abnormality occurred, and there is also an advantage that the number of re-inspections may be small even if it is small. Furthermore, when there are a plurality of good product chutes 73, as shown in FIG. 6, a structure in which two good product chutes 73 are provided on the outer side in the radial direction of the rotary table 20, or as shown in FIG. 7, a structure in which both a defective product chute 631 for the upper plate 23 and a good product chute 73 are provided in the through hole 25 may be used. When the defective product chute 631 for the upper plate 23 and the good product chute 73 are provided in the through hole 25 in this way, it is preferable to provide a partition 233 between these chutes and above the tapered portion 232 so that the defective and good nuts N do not mix.

[0029] In addition, in the above-described embodiment, the upper plate 23 and the lower plate 24 rotate integrally. However, they may each have a separate conveyance motor 21 and have a structure in which they rotate separately. When the upper plate 23 and the lower plate 24 are driven separately in this way, when an exclusion failure occurs on one hand, it is not necessary for both the upper plate 23 and the lower plate 24 to be reversely driven, so there are advantages such as an improvement in inspection speed. Further, when the workpieces supplied to the upper plate 23 and the lower plate 24 are the same, the supply rail 31 for supplying the workpieces to them may be in a Y shape in which the starting ends thereof merge. In that case, by supplying the workpieces to the starting ends of the Y-shaped supply rail 31, it becomes possible to supply the nuts N to both the upper plate 23 and the lower plate 24 with only one supply device. Note that various sensors are preferably selected according to the workpiece, and there is no problem even if the configuration is other than the above sensors.

Explanation of Reference Numerals

[0030] 10 … Inspection device 20 … Rotating table 21 … Conveyance motor 23 … Upper plate 232… Taper portion 24 … Lower plate 25 … Through hole 30 … Supply unit 31 … Supply rail 32 … Separation supply means 322… Delivery disk 323… Contact member 324… Adjustment disk 40 … Alignment unit 50 … Inspection unit 60 … Exclusion unit 70 … Discharge unit N … Nut

Claims

1. A rotary table having an upper surface on which a conveyance path for aligning workpieces along the circumferential direction is formed, and being rotated by receiving the drive of a rotary drive source; A supply unit for sequentially supplying workpieces to the conveyance path of the rotary table; In an inspection apparatus comprising an inspection unit for inspecting workpieces on the conveyance path of the rotary table, The inspection apparatus is characterized in that a plurality of conveyance paths are formed concentrically on the upper surface of the rotary table.

2. The rotary table has a lower plate provided with a conveyance path on the radially outer side and an upper plate provided above the lower plate, The inspection apparatus according to claim 1, wherein the lower plate and the upper plate are each provided with a conveyance path.

3. The inspection apparatus according to claim 1, wherein the supply unit is configured to alternately supply workpieces to the plurality of conveyance paths.

4. The supply unit includes a separation supply means capable of arranging workpieces on the conveyance path, The inspection apparatus according to claim 1, wherein the separation supply means is configured to supply workpieces to the conveyance path at equal intervals.

5. The inspection apparatus according to claim 4, further comprising a control unit for controlling the driving of the rotary table and the separation supply means, wherein the control unit is configured to control the driving of the separation supply means so that a workpiece is supplied from the supply unit to the rotary table each time the rotary table is rotationally driven by a predetermined angle.

6. On the conveyance path of the workpiece by the rotary table, an exclusion unit for excluding a workpiece determined to be defective from the conveyance path and a discharge unit for discharging a workpiece determined to be non-defective are provided downstream of the inspection apparatus. The inspection apparatus according to claim 1, characterized in that.

7. The inspection apparatus according to claim 6, characterized in that a through hole is formed at the center of the rotary table, and a defective product chute capable of receiving a workpiece excluded from the conveyance path provided on the radially inner side is disposed in the through hole.

Images