JP6435535B2 - Work characteristic measuring apparatus and work characteristic measuring method - Google Patents

Description

  The present invention individually stores and conveys workpieces such as electronic components in a plurality of workpiece storage holes formed in the conveyance table, and measures the characteristics of the workpiece by the workpiece characteristic measurement unit arranged in the rotation path of the conveyance table. The present invention relates to a workpiece property measuring apparatus and a workpiece property measuring method, and in particular, when measuring a workpiece having a low hardness portion that is likely to be scratched by pressing, the workpiece property can be fixed without pressing the low hardness portion. The present invention relates to a measuring apparatus and a workpiece characteristic measuring method.

  2. Description of the Related Art Conventionally, there is known a workpiece characteristic measuring apparatus that individually accommodates and conveys workpieces such as electronic components in a plurality of workpiece accommodation holes formed on a rotatable conveyance table (see Patent Document 1).

  FIG. 28 shows a plan view of the workpiece transfer device described in Patent Document 1. The workpiece transfer apparatus 100 includes a rotatable transfer table 102 disposed on a horizontal table base 101.

  A plurality of workpiece storage holes 103 for individually storing workpieces W0 such as chip-type electronic components shown in FIG. 29 are formed on the outer periphery of the transfer table 102. The transport table 102 is intermittently rotated clockwise (in the direction of arrow A) around the central shaft 104 by the action of a drive mechanism (not shown). Further, the upper surface of the work storage hole 103 is covered with a table cover 105 except for the work storage hole 103 located in the separation supply unit 107 described later.

  A perspective view of the workpiece W0 is shown in FIG. The work W0 is a light emitting diode (LED), and has a rectangular parallelepiped main body W0x having a light emitting surface W0s on the upper surface, and lead terminals W0a and W0b protruding from the main body W0x forward and rearward in the longitudinal direction.

  FIGS. 30A, 30B, 30C, and 30D show the work W0 viewed from the E0 direction, the F0 direction, the G0 direction, and the H0 direction in FIG. 29, respectively. As shown in FIGS. 30A and 30C, the lead terminals W0a and W0b protrude from the rear surface W0c and the front surface W0d of the main body W0x, respectively, and their bottom surfaces coincide with the bottom surface of the main body W0x. FIG. 31 shows an internal circuit of the work W0. The internal circuit is a light emitting diode D0, the lead terminal W0a being an anode, and the lead terminal W0b being a cathode. When a voltage is applied between the lead terminals W0a and W0b so that W0a has a high potential, the light emitting diode D0 emits light.

  At this time, the light emitting surface W0s in FIG. 29 emits light in appearance. The light emitting surface W0s is slightly recessed from the upper surface W0t of the main body W0x, as shown in FIGS. As an example of a commercially available light emitting diode, the main body W0x shown in FIG. 29 has a vertical X0 of 3 mm, a horizontal Y0 of 5 mm, a height Z0 of 1 mm, and the length j of the protruding portions of the lead terminals W0a and W0b is 0.3 mm. Some have a height k of 0.25 mm.

  The workpiece W0 shown in FIG. 29 is conveyed in the direction of arrow B in a row by the action of vibration of the linear linear feeder 106 in the workpiece conveyance device shown in FIG. At this time, the lead terminal W0b shown in FIG. 29 is positioned in the direction of arrow B shown in FIG. The terminal portion of the linear feeder 106 faces the opening of the work storage hole 103 formed in the outer peripheral portion of the transfer table 102, and a separation supply unit 107 is provided there. The workpieces W0 conveyed in a line on the linear feeder 106 are separated by the separation supply unit 107 and individually stored in the workpiece storage holes 103 formed in the outer peripheral portion of the conveyance table 102. And it is conveyed by intermittent rotation of the conveyance table 102 in the direction of arrow A in FIG.

  A first inspection unit 108, a second inspection unit 109, and a discharge unit 110 are installed in this order along the intermittent rotation direction (arrow A direction) on the outer periphery of the transport table 102. In the first inspection unit 108, an electrical characteristic inspection of the workpiece W0 is performed. This is shown in FIG. 32 through FIG. 34 as CC ′ sectional views of FIG.

  In FIG. 32, the transfer table 102 is stopped, and the workpiece W0 is positioned in the first inspection unit 108. In the first inspection unit 108, probes P0a and P0b are disposed in the table base 101 immediately below the lead terminals W0a and W0b. Then, by the action of a drive mechanism (not shown), the probes P0a and P0b advance in the direction of the arrow K1 toward the lead terminals W0a and W0b as shown in FIG. The probes P0a and P0b push up the workpiece W0 in contact with the lead terminals W0a and W0b, so that the upper surface W0t of the workpiece W0 contacts the lower surface 108as of the first inspection unit cover 108a covering the upper surface of the workpiece storage hole 103. Stop in contact. In this state, the probes P0a and P0b are connected to a measuring device (not shown) and measure the electrical characteristics of the workpiece W0.

  Thereafter, as shown in FIG. 34, the probes P0a and P0b are retracted in the direction of the arrow K2 by the action of a drive mechanism (not shown), and return to the state shown in FIG. And the conveyance table 102 rotates intermittently and the workpiece | work W0 is conveyed. Thereafter, the workpiece W0 reaches the second inspection unit 109 and inspects inspection items different from those of the first inspection unit 108. And it reaches | attains the discharge part 110 and is discharged | emitted from the workpiece | work storage hole 103 by the discharge means which is not shown in figure.

  The work conveying apparatus 100 according to the conventional technique as described above has the following problems. As shown in FIG. 33, when measuring the electrical characteristics of the workpiece W0, the probes P0a and P0b push up the workpiece W0 in contact with the lead terminals W0a and W0b, and cover the upper surface of the workpiece storage hole 103. The operation stops in a state where the upper surface W0t of the workpiece W0 is in contact with the lower surface 108as of the cover 108a. The reason for performing the measurement in this state is that the probes P0a and P0b are brought into contact with the lead terminals W0a and W0b with the workpiece W0 fixed, so that the probes P0a and P0b have a sufficiently large pressure on the lead terminals W0a and W0b. This is because the contact resistance is reduced by the contact and the measurement accuracy can be ensured.

  Incidentally, the main body W0x of the workpiece W0 shown in FIG. 29 is covered with a dielectric that is a high-hardness portion that is less likely to be damaged by pressing. For this reason, even if the upper surface W0t abuts on the lower surface 108as of the first inspection section cover 108a as shown in FIG. 33, if it is subsequently separated as shown in FIG. 34, the upper surface W0t of the main body W0x is damaged. There is no.

  On the other hand, the light emitting surface W0s shown in FIG. 29 is formed of a resin that is a low-hardness portion that is easily damaged by pressing, and when it comes into contact with the lower surface 108as of the first inspection portion cover 108a, the light emitting surface W0s shown in FIG. Even if separated as shown in FIG. 29, the light emitting surface W0s shown in FIG. 29 is damaged.

  In general, in the case of the workpiece W0 shown in FIG. 29, as shown in FIGS. 30B and 30C, the light emitting surface W0s is formed inside the upper surface of the main body W0x and is slightly recessed from the upper surface. The light emitting surface W0s does not contact the lower surface 108as of the first inspection unit cover 108a.

  However, among the light emitting diodes, a light emitting portion (hereinafter referred to as a light emitting portion) is not a planar shape like the light emitting surface W0s of the workpiece W0 in FIG. 29, but a solid shape that protrudes further upward from the upper surface of the workpiece. is there. In addition, there is a shape in which the light emitting portion further protrudes in four directions covering the periphery of the upper surface. In that case, when the work is fixed at the time of measurement, if a fixing method according to the prior art as shown in FIG. 33 is adopted, the light emitting part is damaged by being pressed.

  On the other hand, in order to avoid this state, if the probe is brought into contact with the work terminal without being fixed while the work is placed in the work storage hole 103, the probe is brought into contact with the work terminal with a sufficiently large pressure. I can't do that. For this reason, the contact resistance between the probe and the terminal of the workpiece increases, and measurement accuracy cannot be ensured. In addition, it is difficult to abut the light emitting portion, which is a low hardness portion, anywhere on the periphery of the work storage hole 103 without fixing the main body, which is a high hardness portion. The range that can be reduced. Furthermore, when only the high hardness part of the workpiece is pressed when fixing in this way, the pressing force is applied to a narrow range, so that an abnormality such as tilting of the posture of the workpiece may occur and correct measurement may not be possible. .

JP 2012-20822 A

  The object of the present invention has been made in consideration of such points, and has a high-hardness portion that is unlikely to be damaged by pressing and a low-hardness portion that is likely to be damaged by pressing, such as a light-emitting diode. A workpiece characteristic measuring apparatus and workpiece characteristic measuring method capable of fixing a workpiece without causing scratches on a low hardness portion by pressing only the high hardness portion when measuring the electrical characteristics of the workpiece. The purpose is to provide.

  The present invention relates to a workpiece characteristic measuring apparatus for measuring the characteristics of a workpiece having a high hardness portion and a low hardness portion, and a table base and an opening portion that is rotatably disposed on the table base and opens outward. And a work table having a plurality of work storage holes provided along the outer periphery of the work table, and a work piece provided on the outer periphery of the transport table for measuring the characteristics of the work stored in the work storage hole. The workpiece characteristic inspection unit includes an inspection member that abuts against the workpiece and performs workpiece characteristic inspection, and an inner wall side of the workpiece storage hole that faces the opening of the workpiece storage hole. And a fixing means for fixing the workpiece toward the wall, and a notch is formed on the inner wall of each workpiece storage hole to release the low hardness portion of the workpiece when the workpiece abuts against the inner wall. A characteristic measuring device of a work.

  In the present invention, the fixing means includes a pusher that presses the high hardness portion of the workpiece from the opening toward the inner wall side, and the characteristic inspection portion of the workpiece includes a distance measurement unit that measures a movement distance of the pusher, and a distance measurement unit And a forcible discharging means that is operated by the control unit to discharge the work in the work storage hole when the moving distance measured by the step is larger than a predetermined distance. It is.

  According to the present invention, the workpiece characteristic inspection unit includes a suction passage that is provided in the table base and sucks the workpiece toward the table base, a vacuum degree measurement unit that measures the degree of vacuum in the suction passage, and a vacuum degree measurement unit. When the measured degree of vacuum is lower than a predetermined degree of vacuum, the characteristic measuring apparatus further includes forcible discharge means for discharging the work in the work storage hole by the control unit.

  The present invention provides the workpiece characteristic measuring apparatus, wherein the forced discharge means includes discharge detection means for detecting that the work in the work storage hole has been discharged.

  The present invention relates to a workpiece characteristic measuring method for measuring the characteristics of a workpiece having a high hardness portion and a low hardness portion, and is arranged rotatably on a table base and has an opening portion that opens outward and accommodates the workpiece. A plurality of workpiece storage holes are transported by a transport table provided along an outer peripheral edge, and a characteristic inspection of the workpiece stored in the workpiece storage hole is provided on the outer periphery of the transport table. A workpiece property inspection step performed by a workpiece property inspection unit, wherein the workpiece property inspection step fixes the workpiece in the workpiece storage hole by a fixing means toward the inner wall side of the workpiece storage hole facing the opening. A workpiece fixing process, and an inspection process for inspecting the workpiece characteristics with an inspection member that abuts against the workpiece and inspects the workpiece characteristics. Work on the inner wall of the hole is a characteristic measuring method of the workpiece, characterized in that the notch to release the low hardness of the workpiece is formed when in contact with the inner wall.

  In the present invention, the fixing means includes a pusher that presses the high hardness portion of the workpiece from the opening toward the inner wall, and the workpiece characteristic measurement step includes a distance measurement step for measuring the movement distance of the pusher, and a distance measurement step. And a forcible discharging step of operating the control unit to discharge the workpiece in the workpiece storage hole when the moving distance measured by the step is greater than a predetermined distance. It is.

  According to the present invention, the workpiece characteristic measuring step includes a suction step of sucking the workpiece toward the table base by a suction passage provided in the table base, a vacuum degree measuring step of measuring a vacuum degree in the suction passage, and a vacuum The workpiece characteristic measurement further includes a forcible discharging step of discharging the workpiece in the workpiece storage hole by the control unit when the degree of vacuum measured by the degree measuring step is lower than a predetermined degree of vacuum. Is the method.

  The present invention is the workpiece characteristic measurement method, wherein the forced discharge step includes a discharge detection step of detecting that the workpiece in the workpiece storage hole is discharged.

  As described above, according to the present invention, it is possible to perform accurate characteristic measurement on a workpiece by fixing the workpiece without damaging the low hardness portion of the workpiece.

FIG. 1 is a plan view showing a workpiece characteristic measuring apparatus according to the present invention. FIG. 2 is a perspective view showing a workpiece. 3A, 3B, 3C, and 3D are views of the workpiece as viewed from the E1, F1, G1, and H1 directions in FIG. FIG. 4 is a diagram showing an internal circuit of the work. FIG. 5 is a perspective view showing a work storage hole. FIG. 6 is a plan view showing a transfer table in the vicinity of the workpiece storage hole. 7A is a cross-sectional view taken along the line R1 in FIG. 6 when the workpiece storage hole is at the position N in FIG. 1, and FIGS. 7B and 7C are schematic views of the workpiece storage hole in FIG. FIG. 7 is a cross-sectional view taken along line R1, and FIG. 7D is a cross-sectional view taken along line R2 in FIG. FIG. 8 is a perspective view illustrating a state in which a workpiece is stored in the workpiece storage hole illustrated in FIG. 5. 9 is a perspective view of FIG. 8 viewed from the direction of the arrow U1. FIG. 10 is a perspective view showing a state in which the work accommodation hole is stopped at the photoelectric characteristic inspection section shown in FIG. 1. 11 is a perspective view of the probe passage viewed from the direction of arrow U2 in FIG. FIG. 12 is a perspective view of the work when it reaches the photoelectric property inspection unit as seen from the direction of the arrow U2 in FIG. FIG. 13 is a diagram illustrating a state in which a workpiece is fixed and inspected in the photoelectric characteristic inspection unit. FIG. 14 is a diagram illustrating a state in which a workpiece is fixed and inspected in the photoelectric characteristic inspection unit. FIG. 15 is a diagram illustrating a state in which a workpiece is fixed and inspected in the photoelectric characteristic inspection unit. 16 (a), 16 (b), and 16 (c) show the work in the work storage hole when the pusher advances in the direction of the arrow M1 in FIG. 13 and the tip surface of the contact part comes into contact with the surface of the work body. Explanatory drawing of an example which inclines in. 17 is a view showing a state where the probe is raised in the direction of arrow K1 in FIG. 14 from the state of FIG. FIG. 18 is a plan view showing a pusher. FIGS. 19A and 19B are enlarged views of the region V1 for explaining the operation of the detection block and the proximity sensor in FIG. FIGS. 20A and 20B are explanatory diagrams of other factors that cause the posture of the workpiece in the workpiece storage hole in the photoelectric property inspection section to be inclined due to the manufacturing deviation of the main body of the workpiece. FIGS. 21 (a) and 21 (b) show the state when the probe shown in FIG. 11 is raised in the direction of the arrow K1 with respect to the work in which only the rear in the rotation direction of the transfer table is fixed, from the center axis side of the transfer table. A perspective view. FIG. 22 is an explanatory diagram of the action of discharging the workpiece from the workpiece storage hole when it is detected that the posture of the workpiece is tilted in the photoelectric characteristic inspection unit. FIG. 23 is an explanatory diagram of the action of discharging the workpiece from the workpiece storage hole when it is detected that the posture of the workpiece is tilted in the photoelectric characteristic inspection unit. FIG. 24 is an explanatory diagram of the action of discharging the workpiece from the workpiece storage hole when it is detected that the posture of the workpiece is tilted in the photoelectric characteristic inspection unit. FIG. 25 is an explanatory diagram of the action of discharging the workpiece from the workpiece storage hole when it is detected that the posture of the workpiece is tilted in the photoelectric characteristic inspection unit. FIG. 26 is an explanatory diagram of the action of discharging the workpiece from the workpiece storage hole when it is detected that the posture of the workpiece is tilted in the photoelectric characteristic inspection unit. FIG. 27 is an explanatory diagram of the action of discharging the workpiece from the workpiece storage hole when it is detected that the posture of the workpiece is inclined in the photoelectric characteristic inspection unit. FIG. 28 is a plan view of a conventional workpiece transfer apparatus. FIG. 29 is a perspective view showing a workpiece. 30 (a), (b), (c), and (d) are views of the workpiece as viewed from the E0 direction, the F0 direction, the G0 direction, and the H0 direction in FIG. FIG. 31 is a diagram showing an internal circuit of a work. FIG. 32 is an explanatory view showing electrical property inspection of a workpiece according to the prior art. FIG. 33 is an explanatory view showing an electrical property inspection of a workpiece according to the prior art. FIG. 34 is an explanatory view showing an electrical property inspection of a workpiece according to the prior art.

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

  First, the workpiece W1 measured by the workpiece characteristic measuring apparatus according to the present invention will be described. First, a perspective view of the workpiece W1 is shown in FIG. The work W1 is a light emitting diode (LED), and includes a main body W1x, electrodes W1a and W1b formed on the lower surface of the main body W1x, and a light emitter W1p. FIGS. 3A, 3B, 3C, and 3D show the work W1 viewed from the E1, F1, G1, and H1 directions in FIG. 2, respectively. As shown in FIGS. 3A, 3B, and 3C, the light emitter W1p covers the upper surface of the main body W1x and has a shape protruding upward from the upper surface.

  And the light-emitting body W1p has the edge part W1e which protrudes slightly around the main body W1x in the boundary part with the main body W1x. As shown in FIGS. 3C and 3D, extremely thin electrodes W1a and W1b are formed on the lower surface of the main body W1x. The main body W1x is covered with a dielectric that is a high-hardness part that is less likely to be damaged by pressing, and thus the main body W1x constitutes the high-hardness part W1x. On the other hand, the light emitting portion W1p is formed of a resin that is a low hardness portion that is easily damaged by pressing. Thereby, the light emission part W1p comprises the low hardness part W1p.

  An internal circuit of the work W1 is shown in FIG. The internal circuit is the light emitting diode D1, the electrode W1a is the anode, and the electrode W1b is the cathode. When a voltage is applied between the electrodes W1a and W1b so that W1a has a high potential, the light emitting diode D1 emits light. At this time, the outer appearance of the light emitter W1p in FIG. 2 emits light. Further, as shown in FIG. 3D, the electrode W1a is formed with an anode mark W1ar indicating an anode as a semicircular cutout.

  As an example of a commercially available light emitting diode, the width X1 of the main body W1x shown in FIG. 2 is 1.5 mm to 2.0 mm, the length Y1 is 2.0 mm to 2.5 mm, and the height Z1 is 0.7 to 1. 3 mm, the main body width X1a shown in FIG. 3B is 1.5 mm to 1.7 mm, the main body height Z1a is 0.2 to 0.4 mm, and the electrode thickness Z1e is about 0.05 mm. FIG. The main body length Y1a shown in FIG.

  Next, a workpiece characteristic measuring apparatus 100 according to the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 5, a workpiece characteristic measuring apparatus 100 measures the characteristics of a workpiece W1 having a high hardness portion W1x and a low hardness portion W1p, and rotates on the table base 1 and the table base 1. A transport table 2 that is freely installed is provided. A plurality of workpiece storage holes 3 are provided along the outer peripheral edge of the transfer table 2. Each workpiece storage hole 3 stores a workpiece W1, an opening 30 that opens outward, a back wall 3si that faces the opening 30, a left wall 3sf1 that forms both sides of the workpiece storage hole 3, and A right wall surface 3sf2.

  As will be described later, the back wall 3si of the workpiece storage hole 3 constitutes an inner wall of the workpiece storage hole 3 together with a pressing surface 5s of the table chip 5 described later.

  Further, the transfer table 2 is intermittently rotated clockwise (in the direction of arrow A) around the central axis 4 by the action of a drive mechanism (not shown). The surface of the transport table 2 on the side of the table base 1 at the position where the work storage hole 3 is formed is incorporated in the transport table 2 at a position adjacent to the central axis 4 side when viewed from each work storage hole 3. A table chip 5 is formed.

  In FIG. 1, a linear linear feeder 6 is disposed toward the conveyance table 2. The linear feeder 6 vibrates due to the action of a drive mechanism (not shown) and conveys the workpiece W1 in a line toward the conveyance table 2 in the direction of arrow B. The terminal portion of the linear feeder 6 faces the opening of the work storage hole 3 formed on the outer peripheral edge of the transfer table 2, and the separation supply unit 7 is disposed there. The separation supply unit 7 has a function of individually supplying the workpiece W1 conveyed by the linear feeder 6 to the workpiece storage hole 3.

  Further, as shown in FIG. 1, a first image that performs an appearance inspection by imaging the upper surface of the work W <b> 1 along the rotation direction (arrow A direction) of the transfer table 2 from the separation supply unit 7 to the outer periphery of the transfer table 2. The inspection unit 8, the second image inspection unit 9 that performs an appearance inspection by imaging the lower surface of the workpiece W1, the photoelectric characteristic inspection unit 10 as a measuring unit that inspects the optical characteristics and the electrical characteristics of the workpiece W1, and each of the inspections A defective product discharge unit 11 that discharges the workpiece W1 having a defective result from the workpiece storage hole 3, and a non-defective product discharge unit 12 that discharges the workpiece W1 whose result of each inspection is a non-defective product from the workpiece storage hole 3 are in this order. Has been placed.

  Note that the separation supply unit 7, the first image inspection unit 8, the second image inspection unit 9, the photoelectric characteristic inspection unit 10, and defective products are arranged on the upper surface of the work storage hole 3 of the conveyance table 2 and the outside of the conveyance table 2. Except for the discharge unit 11 and the non-defective product discharge unit 12, they are covered with a table cover 13 and a table guide 14, respectively.

  A pusher 15 that can be moved back and forth in the directions of arrows M1 and M2 toward the opening of the work storage hole 3 by the action of a drive mechanism (not shown) is provided outside the transfer table 2 in the photoelectric property inspection unit (characteristic inspection unit) 10. Has been placed. The pusher 15 has a function as a work fixing means for pressing the work W1 when the photoelectric characteristic inspection unit 10 inspects the work W1 in the work storage hole 3.

  Further, on the upper side of the transport table 2 and in the vicinity of the photoelectric characteristic inspection unit 10, an arrow L1 and L2 are provided between the standby position shown in FIG. A posture defective work discharge unit (forced discharge means) 16 that moves forward and backward in the direction is arranged. The poor posture workpiece discharge unit 16 has a function as a forced discharge unit that discharges the workpiece W1 that has been determined as a poor posture in the photoelectric characteristic inspection unit 10 from the workpiece storage hole 3 as described later. The defective posture work discharge unit 16 includes a discharge head 16a that sucks the work W1 and a discharge pipe 16b that guides the sucked work W1 to a storage box 25 described later. Furthermore, the control part 17 which controls about operation | movement of each above-mentioned part is arrange | positioned.

  Next, the work storage unit 3 will be described. FIG. 5 is a perspective view of the work storage hole 3, and an arrow A that is the rotation direction of the transfer table 2 in FIG. 1 is shown in FIG. 5. The work storage hole 3 opens toward the outside of the transfer table 2. As described above, the workpiece storage hole 3 is surrounded in three directions by the opposing left wall surface 3sf1, right wall surface 3sf2, and back wall surface 3si, and the remaining one surface is the opening 30.

  Of the three wall surfaces, the back wall surface 3si is located on the central axis 4 side shown in FIG. Further, as described above, the table on the side of the table base 1 at the position where the workpiece storage hole 3 is formed in the transfer table 2 is positioned adjacent to the central axis 4 side when viewed from each workpiece storage hole 3. Chip 5 is incorporated. The pressing surface 5 s of the table chip 5 facing the outside of the transfer table 2 protrudes outside the transfer table 2, that is, into the work storage hole 3 by the length δ 1 from the back wall surface 3si of the work storage hole 3.

  The inner wall facing the opening 30 is configured by the inner wall surface 3si and the pressing surface 5s of the workpiece storage hole 3 configured as described above. Further, a first table chip vacuum passage 51v and a second table chip vacuum passage 52v are formed on the pressing surface 5s of the table chip 5 at positions in contact with the left wall surface 3sf1 and the right wall surface 3sf2 of the work storage hole 3. Yes. The first table chip vacuum passage 51v and the second table chip vacuum passage 52v communicate with the vacuum generation source 18 as described later, and are always sucked in the directions of arrows S1 and S2.

  Further, in the transfer table 2, a transfer table air injection passage 31 a is formed at the central portion of the back wall surface 3 si of the work storage hole 3 and at a position directly above the table chip 5. In the transfer table air injection passage 31a, compressed air is injected in the direction of arrow J1 by the action of a discharge unit switching valve 19 described later.

  A plan view of the transfer table 2 in the vicinity of the work storage hole 3 is shown in FIG. 6 shows an arrow A that is the rotation direction of the transfer table 2 in FIG. 6 is a cross-sectional view of the transfer table air injection passage 31a shown in FIG. 6 when the workpiece storage hole 3 is at the position N in FIG. 1, and FIG. 7A shows the first table chip vacuum. FIG. 7 (d) shows R2 cross-sectional views of the passage 51v.

  In FIG. 5, the transfer table air injection passage 31a formed in the horizontal direction from the back wall surface 3si of the work storage hole 3 in the transfer table 2 is the direction of the rotary shaft 4 (FIG. 1), that is, as shown in FIG. 6 extends slightly in the right direction, and further changes the direction of 90 ° to penetrate the table chip 5 to reach the upper surface of the table base 1 as shown in FIG.

  On the other hand, as shown in FIG. 5, the first table chip vacuum passage 51v formed in the horizontal direction from the pressing surface 5s of the table chip 5 to the table chip 5 has a rotating shaft 4 as shown in FIG. In the direction of (FIG. 1), that is, in the right direction in FIG. 6, the direction of 90 ° is changed to reach the transfer table 2, and then the direction of 90 ° is changed further to the lower surface of the transfer table 2 positioned immediately above the table chip 5. 1 conveyance table vacuum passage 31v.

  As shown in FIG. 6, the second table chip vacuum passage 52v formed in the table chip 5 is the same path as the first table chip vacuum passage 51v, and the second transport table vacuum passage on the lower surface of the transport table 2. Thus, the first transfer table vacuum passage 31v and the second transfer table vacuum passage 32v are combined as shown in FIG. 6 to form a transfer table basic vacuum passage 3v.

  Then, as shown in FIG. 7 (d), the transport table basic vacuum passage 3 v changes the direction of 90 ° to penetrate the table chip 5 and reach the table base 1. The first table chip vacuum passage 51v and the second table chip vacuum passage 52v are always sucked in the directions of arrows S1 and S2 by communicating with the vacuum generation source 18 installed in the table base 1. Yes. That is, the work storage hole 3 is constantly vacuumed. The transfer table basic vacuum passage 3v is also shown in FIG.

  6 is an R1 cross-sectional view of the transfer table air injection passage 31a shown in FIG. 6 when the workpiece storage hole 3 is located in the defective product discharge portion 11 and the non-defective product discharge portion 12 in FIG. c). 7 (b) and FIG. 7 (a) are different from FIG. 7 (b) in that the transfer table air injection passage 31a whose upper surface of the table base 1 is terminated in FIG. In (c), it is connected to the table base 1.

  The transfer table air injection passage 31 a is connected to a discharge unit switching valve 19 disposed in the table base 1. The discharge unit switching valve 19 has an action of selecting the communication destination of the transfer table air injection passage 31 a from the atmospheric pressure and the compressed air source 20. FIG. 7B shows a state in which the discharge unit switching valve 19 selects the n side, that is, the atmospheric pressure. At this time, the atmospheric pressure is maintained in the transfer table air injection passage 31a. Moreover, FIG.7 (c) shows a mode that the discharge part switching valve 19 has selected the a side, ie, the compressed air source 20. FIG. At this time, compressed air is injected in the direction of arrow J1 into the transfer table air injection passage 31a. In this way, the conveyance table air injection passage 31a passes through the table base 1 and is connected to the discharge unit switching valve 19 only when the defective table discharge unit 11 and the non-defective product discharge unit 12 in FIG.

  The reason is that, as described above, the defective product discharge unit 11 and the non-defective product discharge unit 12 have a function of discharging the work having a defective inspection result and the work having a non-defective product from the work storage hole 3, respectively. Because. That is, when the workpiece storage hole 3 storing the workpiece W1 stops at the defective product discharge unit 11 and the non-defective product discharge unit 12, the discharge unit switching valve is initially shown in FIG. 7B by the control of the control unit 17 of FIG. 19 selects the n side, i.e. atmospheric pressure. At this time, the atmospheric pressure is maintained in the transfer table air injection passage 31a. Next, when the workpiece W1 in the workpiece storage hole 3 is a workpiece to be discharged in the discharge portion, the discharge portion switching valve 19 is controlled as shown in FIG. 7C by the control of the control portion 17 in FIG. Selects the a side, that is, the compressed air source 20. At this time, compressed air is injected in the direction of arrow J1 into the transfer table air injection passage 31a. At this time, in FIG. 5, compressed air is injected into the workpiece storage hole 3 in the direction of the arrow J1. By the action of the compressed air, the workpiece W1 in the workpiece storage hole 3 jumps out toward the outer peripheral side of the transfer table 2, is guided to a discharge pipe (not shown), and is stored in a storage box (not shown). As described above, the work storage hole 3 is constantly vacuumed, but the jet pressure of the compressed air in the direction of the arrow J1 is set to a size that can overcome the vacuum suction force. The work is discharged smoothly from the storage hole 3.

  FIG. 8 is a perspective view showing a state in which the workpiece W1 is stored in the workpiece storage hole 3 shown in FIG. Here, in FIG. 8, the table cover 13 and the table guide 14 shown in FIG. 1 are omitted. 9 is a perspective view of FIG. 8 viewed from the direction of the arrow U1. However, in FIG. 9, only the first table chip vacuum passage 51v is shown for simplicity.

  As shown in FIGS. 8 and 9, the work W <b> 1 has a light-emitting body W <b> 1 p that is a low-hardness part facing upward of the work housing hole 3, and one surface W <b> 1 s <b> 2 that is a high-hardness part is It is made to contact and is stored in the work storage hole 3. And both the main body W1x which is a high hardness part and the light-emitting body W1p which is a low hardness part face the opening part 30 of the workpiece | work storage hole 3, and the inner wall (back wall surface 3si and press surface 5s) which opposes it.

  At this time, as described above, the first table chip vacuum passage 51v and the second table chip vacuum passage 52v are always sucked in the directions of the arrows S1 and S2. The workpiece W1 maintains the posture shown in FIGS. 8 and 9 by this suction action. Further, as described above, the light emitter W1p of the workpiece W1 has the edge W1e that slightly protrudes around the main body W1x at the boundary with the main body W1x. The protruding length is indicated by δ2 in FIG. On the other hand, as described above, the pressing surface 5s of the table chip 5 facing the outside of the transfer table 2 protrudes into the work storage hole 3 by a length δ1 from the back wall surface 3si of the work storage hole 3 (FIG. 5). ). By setting the protrusion length δ1 so as to satisfy the relationship of δ1> δ2, as shown in FIG. 9, the inner wall of the work storage hole 3 including the back wall surface 3si and the pressing surface 5s is a low hardness portion. A wall surface is not formed in a range where the outer periphery of the edge W1e contacts. That is, even if one surface W1s2 of the main body W1x that is a high hardness portion abuts against the pressing surface 5s of the table chip 5 and is pressed by suction in the direction of the arrow S1, the edge W1e that is a low hardness portion does not abut anywhere. . Thereby, it is possible to prevent the edge W1e from being damaged by the pressing.

  In FIG. 9, the back wall surface 3si constituting the inner wall of the work storage hole 3 does not contact the light emitter (low hardness portion) W1p, and similarly against the pressing surface 5s of the table chip 5 constituting the inner wall. It functions as a notch that allows the light emitter W1p to escape.

  Next, FIG. 10 is a perspective view showing a state in which the work storage hole 3 is stopped at the photoelectric characteristic inspection unit 10 shown in FIG. A suction injection passage 10 a is formed in the table base 1 of the photoelectric characteristic inspection unit 10. The suction / injection passage 10a is vacuum-sucked in the direction of the arrow S3 or compressed air is injected in the direction of the arrow J2 by the action of the inspection unit switching valve 21 described later. Probe passages 10b and 10c are formed so as to sandwich the suction / injection passage 10a in the diameter direction of the transport table 2.

  FIG. 11 shows a perspective view of the probe passages 10b and 10c as seen from the direction of the arrow U2 in FIG. Probes P1a and P1b are respectively arranged in the probe passages 10b and 10c in the table base 1, and they are connected to a measuring instrument (not shown) in the table base. The probes P1a and P1b function as inspection members that contact the workpiece W1 to inspect the characteristics of the workpiece W1, and can be raised and lowered in the K1 direction and the K2 direction by the action of a drive mechanism (not shown).

  When the workpiece storage hole 3 is positioned in the photoelectric characteristic inspection unit 10, the electrodes W1a and W1b of the workpiece W1 in the workpiece storage hole 3 are positioned immediately above the probe passages 10b and 10c. For this reason, the probes P1a and P1b raised in the K1 direction come into contact with the electrodes W1a and W1b of the workpiece W1. Further, as shown in FIG. 10, the outer side of the conveyance table 2 in the photoelectric characteristic inspection unit 10 advances and retreats in the directions of arrows M1 and M2 toward the opening 30 of the work storage hole 3 by the action of a drive mechanism (not shown). An abutting portion 15a of the pusher 15 that can be freely arranged is disposed.

  Next, the operation of the present embodiment having such a configuration will be described.

  In FIG. 1, a workpiece W1 is conveyed in the direction of arrow B in a single row state by a linear feeder 6 that vibrates by the action of a drive mechanism (not shown). At that time, the electrodes W1a and W1b shown in FIG. 2 of the workpiece W1 are conveyed along the arrow B direction in FIG. At this time, it is not determined which of the electrodes W1a and W1b is positioned before and after the arrow B direction.

  The workpieces W1 conveyed by the linear feeder 6 are individually separated by the action of a separation mechanism (not shown) in the separation supply unit 7 shown in FIG. 1 and are stored in the workpiece storage holes 3 of the transfer table 2. The work W1 stored in the work storage hole 3 is transported by intermittent rotation in the direction of arrow A of the transport table 2 and first reaches the first image inspection unit 8. Then, the upper surface of the work W1 is imaged by an imaging unit (not shown) to perform an appearance inspection. Next, the workpiece W1 reaches the second image inspection unit 9, and an appearance inspection is performed by imaging the lower surface of the workpiece W1 by an imaging unit (not shown). Then, this captured image is processed by an image processing program to detect the anode mark W1ar shown in FIG. 3D and determine the positions of the electrodes W1a and W1b of the workpiece W1. The information is transmitted to the control unit 17 shown in FIG.

  The conveyance table 2 further rotates, and the workpiece W1 in the workpiece storage hole 3 reaches the photoelectric characteristic inspection unit 10. As described above, the electrodes W1a and W1b of the workpiece W1 in the workpiece housing hole 3 are located immediately above the probe passages 10b and 10c in FIG. The state at this time is shown in FIG. 12 as a perspective view seen from the direction of arrow U2 in FIG.

  In FIG. 12, the suction / injection passage 10 a is connected to the inspection unit switching valve 21 in the table base 1. The inspection unit switching valve 21 has an action of selecting a communication destination of the suction / injection passage 10 a from the vacuum generation source 22 and the compressed air source 23. FIG. 12 shows a state where the inspection section switching valve 21 selects the v side, that is, the vacuum generation source 22 side. At this time, the table base side surface of the workpiece W1 is vacuum-sucked by the inspection section switching valve 21 and the vacuum generation source 22, and the suction / injection passage 10a functions as a suction passage.

  That is, the inside of the suction / injection passage 10a is vacuum-sucked in the direction of the arrow S3, and the bottom surface of the workpiece W1 on the table base side is adsorbed on the top surface of the table base 1.

  A vacuum pressure gauge 24 as a vacuum degree measuring means for measuring the degree of vacuum is connected to the suction passage 22x between the inspection unit switching valve 21 and the vacuum generation source 22. In FIG. 12, the probes P <b> 1 a and P <b> 1 b in the probe passages 10 b and 10 c are at a standby position in the table base 1. Further, the abutting portion 15a of the pusher 15 positioned outside the transport table 2 when viewed from the work storage hole 3 has a tip surface 15as substantially flush with the surface 14s of the table guide 14 on the transport table 2 side. It is in the standby position.

  From this state, the workpiece W1 is fixed and inspected by the photoelectric characteristic inspection unit 10 under the control of the control unit 17. The operation of fixing and inspecting the workpiece W1 will be described with reference to FIGS.

  First, as shown in FIG. 13, the pusher 15 advances into the workpiece accommodation hole 3 in the direction of the arrow M1 by the action of a drive mechanism (not shown). And the front end surface 15as of the contact part 15a contact | abuts to the surface W1s1 of the main body W1x of the workpiece | work W1. Next, pressing means (not shown) presses the pusher 15 in the direction of the arrow M1, and the surface W1s2 of the main body W1x of the workpiece W1 is pressed against the pressing surface 5s of the table chip 5. At this time, the work W1 is attracted to the upper surface of the table base 1 by the vacuum suction action in the direction of the arrow S3 in the suction / injection passage 10a in the photoelectric characteristic inspection unit 10, and the pressing surface 5s of the table chip 5 by the action of the pusher 15. Pressed and fixed.

  Next, by the action of a driving mechanism (not shown) controlled by the control unit 17, the probes P1a and P1b are raised in the direction of the arrow K1 in FIG. 14 and come into contact with the electrodes W1a and W1b of the workpiece W1. By the way, as described above, the second image inspection unit 9 detects the anode mark W1ar shown in FIG. 3D and transmits information to the control unit 17 to determine the positions of the electrodes W1a and W1b of the workpiece W1. ing. Based on this information, the control of the control unit 17 causes the photoelectric characteristic inspection unit 10 to perform the operation on the anode (electrode W1a) and cathode (electrode W1b) of the light-emitting diode D1 that is the electric circuit (FIG. 4) of the workpiece W1. The measuring instrument is connected to the probes P1a and P1b so that the measuring instrument (not shown) is correctly connected. In FIG. 14, the electrodes W1a and W1b of the workpiece W1 are positioned on the outer peripheral side and the central axis 4 (FIG. 1) side of the transfer table 2, respectively. Although the electrodes W1a and W1b of all the workpieces W1 in the workpiece housing hole 3 are not necessarily located at the same position as in FIG. 14, in the drawings of this specification, for the sake of simplicity, the electrodes W1a and W1b The positions of the electrodes W1a and W1b are the same as in FIG.

  In FIG. 14, when the probes P1a and P1b come into contact with the electrodes W1a and W1b of the workpiece W1, pressing means (not shown) press the probes P1a and P1b in the direction of the arrow K1, and the probes P1a and P1b Pressed by W1b.

  At this time, as described above, the workpiece W1 is fixed by the vacuum suction action in the arrow S3 direction and the pusher 15 pressing action in the suction / injection passage 10a. Therefore, the probes P1a and P1b can come into contact with the electrodes W1a and W1b of the workpiece W1 with a sufficiently large pressure. That is, the contact resistance between the probes P1a and P1b and the workpiece electrodes W1a and W1b is reduced, and the measurement accuracy can be ensured.

  Further, when the surface W1s2 of the main body W1x of the workpiece W1 is pressed with a strong force by the pressing surface 5s of the table chip 5 by the action of the pusher 15, only the main body W1x which is a high hardness portion is applied to the pressing surface 5s of the table chip 5. The edge W1e which is in contact with the low hardness portion does not contact the back wall 3si. As described above, the reason is that in FIG. 9, the pressing surface 5s of the table chip 5 protrudes from the rear wall surface 3si of the workpiece housing hole 3 and the light emitter W1p of the workpiece W1 protrudes at the boundary between the main body W1x. This is because there is a relationship of δ1> δ2 with the protrusion length δ2 of the edge W1e. That is, by satisfying this relationship, the inner wall of the work storage hole 3 composed of the back wall surface 3si and the pressing surface 5s is not formed with a wall surface in a range where the outer periphery of the edge W1e that is a low hardness portion abuts. It is.

  In this way, the workpiece W1 is fixed in FIG. 14, and the probes P1a and P1b are brought into contact with the electrodes W1a and W1b of the workpiece W1 with a sufficiently large pressure, and the measuring instrument (not shown) and the electrodes W1a and W1b of the workpiece W1 are connected. The Then, a predetermined voltage is applied from the measuring instrument to the electrodes W1a and W1b, and the light emitter W1p emits light.

  In the photoelectric characteristic inspection unit 10, the table cover 13 is not installed above the work storage hole 3 and is open. For this reason, the light from the light emitter W1p is received by a measuring instrument (not shown) disposed on the upper side of the work W1, and optical characteristics such as the wavelength and luminance of the light are inspected. In addition, an electrical characteristic test such as a current flowing through the workpiece W1 when the predetermined voltage is applied is performed by a measuring instrument (not shown) connected to the probes P1a and P1b. The results of these optical characteristic inspection and electrical characteristic inspection are transmitted to the control unit 17 shown in FIG.

  When the above inspection is completed, the probes P1a and P1b are lowered in the direction of the arrow K2 in FIG. 15 by the action of a drive mechanism (not shown) under the control of the control unit 17, and return to the standby position similar to FIG.

  Next, the pusher 15 retreats in the direction M2 in FIG. 15, and returns to the standby position similar to FIG. And the conveyance table 2 rotates and the workpiece | work W1 in the workpiece | work storage hole 3 which complete | finished inspection is conveyed to the inferior goods discharge part 11 shown in FIG. When the workpiece W1 in the workpiece storage hole 3 reaches the defective product discharge unit 11, the control unit 17 determines whether the inspection result of the workpiece W1 in the photoelectric characteristic inspection unit 10 is defective, and determines that it is defective. In this case, the control unit 17 operates the discharge unit switching valve 19 so that compressed air is injected in the direction of the arrow J1 from the transfer table air injection passage 31a shown in FIG. The workpiece W1 in the workpiece storage hole 3 jumps out toward the outer peripheral side of the transfer table 2, is guided to a discharge pipe (not shown), and is stored in a storage box (not shown). On the other hand, when it is determined that the inspection result of the work W1 in the photoelectric characteristic inspection unit 10 is a non-defective product, the non-defective product discharge unit 11 does not discharge the work W1 in the work storage hole 3 and discharges the non-defective product. It is conveyed to the section 12.

  The non-defective workpiece W1 that has reached the non-defective product discharge portion 12 is directed toward the outer peripheral side of the transfer table 2 by the action of compressed air injected from the transfer table air injection passage 31a shown in FIG. It jumps out, is guided to a discharge pipe (not shown), and is stored in a storage box (not shown).

  During this time, as shown in FIG. 13, when the pusher 15 advances in the direction of the arrow M1 and the tip surface 15as of the contact portion 15a contacts the surface W1s1 of the main body W1x of the workpiece W1, the workpiece W1 moves to the workpiece storage hole 3. In some cases. An example thereof is shown in FIGS. 16A, 16B, and 16C as enlarged views of the vicinity of the workpiece W1 in FIG. FIG. 16A shows a state where the pusher 15 has advanced in the direction of the arrow M1 and the tip surface 15as of the contact portion 15a has contacted the surface W1s1 of the main body W1x of the workpiece W1.

  As shown in FIGS. 16A, 16B, and 16C, the surface W1s1 of the main body W1x is not completely parallel to the tip surface 15as of the abutting portion 15a of the pusher 15 that abuts on the surface W1s1. This is due to a manufacturing deviation of the main body W1x of the workpiece W1.

  Since the dimension of each part of the workpiece W1 is at most 1 to 3 mm as described above, it is extremely difficult to reduce this manufacturing error. By the way, when these two non-parallel surfaces come into contact with each other, a substantially V-shaped gap gradually opening from one end of the surfaces to the other end is generated. In the case of FIG. 16A, the front end surface 15as of the contact portion 15a contacts the position near the light emitter W1p of the surface W1s1 of the main body W1x, and the advance output FX1 generated by the advance in the direction of the arrow M1 is concentrated there. Applied. A substantially V-shaped gap that gradually opens toward the bottom surface of the main body W1x on which the electrode W1a is formed is formed between the tip surface 15as of the pusher 15 and the surface W1s1 of the workpiece W1. Has occurred.

  By the way, the abutting portion 15a of the pusher 15 is formed so as to be thin in a direction parallel to the paper surface and thick in a direction perpendicular to the paper surface, and between the two surfaces of the front end surface 15as and the surface W1s1 in the thinly formed direction. A substantially V-shaped gap is formed along.

  For this reason, when the pusher 15 further advances in the direction of the arrow M1 from the state of FIG. 16A, a slip occurs between the two surfaces 15as and W1s1 by the action of the advance output FX1. Then, as shown in FIG. 16B, the position where the force FX1 is applied moves to the side where the gap is opened, that is, the bottom side of the main body W1x where the electrode W1a is formed. For this reason, the side on which the electrode W1a is formed on the bottom surface of the main body W1x is lifted from the top surface of the table base 1, and the posture of the workpiece W1 is inclined in the workpiece housing hole 3. When the pusher 15 further advances from this state in the direction of the arrow M1, as shown in FIG. 16C, the inclination of the workpiece W1 further increases, and the tip surface 15as of the contact portion 15a enters the lower side of the workpiece W1. And stop. The reason why the contact portion 15a advances to the position shown in FIG. 16C and stops is that this position corresponds to a position where the pusher 15 is stopped when the work W1 is not present in the work storage hole 3. .

  In the above description, since the surface W1s1 of the main body W1x of the workpiece W1 that contacts the tip surface 15as of the contact portion 15a of the pusher 15 is not completely parallel to the tip surface 15as of the contact portion 15a, the workpiece W1. The case where the posture of the vehicle is inclined has been described. In addition, in FIG. 16A, when the pressing surface 5s of the table chip 5 and the surface W1s2 of the main body W1x of the work W1 that is in contact with the pressing surface 5s are not completely parallel, A slip occurs between the surfaces W1s2, and the posture of the workpiece W1 is inclined.

  FIG. 17 shows how the probes P1a and P1b are raised in the direction of the arrow K1 in FIG. 14 from the state of FIG. In FIG. 17, the probes P <b> 1 a and P <b> 1 b have entered the work storage hole 3 and stopped. The positions of the probes P1a and P1b at this time correspond to the positions at which the probes P1a and P1b are stopped when the work W1 is not present in the work storage hole 3. In FIG. 17, since the electrode W1a and the probe P1a are not in contact with each other, correct measurement cannot be performed.

  In order to make the state of FIG. 17 normal, the probes P1a and P1b are lowered in the direction of arrow K2 to return to the standby position as shown in FIG. 15, the pusher 15 is retracted in the direction of arrow M2 to return to the standby position, and the pusher again. As shown in FIG. 14, it is necessary to move 15 in the direction of the arrow M1 to contact the main body W1x of the workpiece W1. However, if the cause of the state shown in FIG. 17 is related to the shape of the workpiece W1 as described above, there is a very high possibility that the state will be the same again. For this reason, the state of FIG. 17 is detected, the workpiece W1 is discharged, the subsequent new workpiece W1 is made to reach the photoelectric characteristic inspection unit 10, the pusher 15 is brought into contact with and fixed to the workpiece W1, and the inspection is performed. It is preferable to do.

  In order to detect the state of FIG. 17, a distance measuring unit is provided for measuring the moving distance of the pusher 15 when the work W1 is pressed. This will be described with reference to FIGS. 18 to 19A and 19B. FIG. 18 is a plan view of the pusher 15. Since the pusher 15 is much larger than the work W1 in the work storage hole 3 of the transfer table 2, the notation in the longitudinal direction is omitted. The pusher 15 has a contact portion 15a having substantially the same width as the workpiece W1, and a central portion 15b that is integrally connected to the contact portion 15a and has a width that enters the gap between the table guides 14.

  Further, following the central portion 15b, a base portion 15c connected to a drive mechanism (not shown) is integrally coupled. The base 15c is provided with a detection block 15d and a proximity sensor 15e as distance measuring means for measuring the moving distance from the standby position (FIG. 12) to the main body W1x (FIG. 12) of the workpiece W1. Yes. The detection block 15d functions as a mark indicating the position of the pusher 15, and the position is detected by the proximity sensor 15e as described later. The proximity sensor 15e is arranged at a position that is separated from the base portion 15c and faces the detection block 15d. The proximity sensor 15e has a function of detecting whether or not the object has approached by converting presence information of the object to be detected into an electrical signal. The proximity sensor 15e is connected with a cable 15f for transmitting an alarm that detects the approach of the detection block 15d to the control unit 17 shown in FIG.

  The operation of the detection block 15d and the proximity sensor 15e in FIG. 18 will be described with reference to FIGS. 19A and 19B which are enlarged views of the region V1. In FIG. 19A and FIG. 19B, when there is a detection block 15d that is a detection object of the proximity sensor 15e on the right side of the alarm boundary line 15x indicated by the alternate long and short dash line, an alarm transmission unit in the proximity sensor 15e The alarm PALM (FIG. 19B) that has detected the approach of the detection block 15d is transmitted to the control unit 17 shown in FIG. 1 by 15e1. In this case, in FIG. 19A, the gap 15G between the proximity sensor 15e and the detection block 15d as a detection object is large. That is, the proximity sensor 15e does not detect the detection block 15d because the detection surface 15ds is on the left side of the alarm boundary line 15x indicated by the alternate long and short dash line.

  On the other hand, FIG. 19B shows a state where the pusher 15 has advanced in the direction of the arrow M1 and the detection surface 15ds has reached the right side of the alarm boundary line 15x. In this case, the gap 15G becomes small, and the proximity sensor 15e detects the detection block 15d that is a detection object. Then, a pusher warning PALM is issued from the proximity sensor 15e and transmitted to the control unit 17 shown in FIG. 1 through the cable 15f shown in FIG.

  Next, a setting example of the alarm boundary 15x in FIGS. 19 (a) and 19 (b) will be described. As an example, consider the following conditions:

  Condition 1: In a state where the workpiece W1 is not stored in the workpiece storage hole 3, the moving distance of the pusher 15 is 0.4 mm.

  Condition 2: Except for the dimensional deviation of the workpiece W1 and the manufacturing deviation of the pusher 15, as shown in FIG. 13, the movement distance of the pusher 15 when the pusher 15 correctly fixes the workpiece W1 is 0.2 mm.

  Condition 3: As shown in FIG. 17, the movement distance of the pusher 15 when the pusher 15 cannot correctly fix the workpiece W1 is more than 0.2 mm and not more than 0.4 mm.

  Condition 4: In a state where the pusher 15 is moved by 0.4 mm under the condition 1, adjustment is performed so that the gap 15G between the proximity sensor 15e and the detection block 15d shown in FIGS. 19A and 19B is 0.1 mm.

  Here, as shown in FIG. 19A, when the movement distance of the pusher 15 in the advance direction M1 is small, that is, when the gap 15G is large, it can be determined that the pusher 15 can be correctly fixed as shown in FIG. Further, it can be seen that when the moving distance is large as shown in FIG. 19B, that is, when the gap 15G is small, it can be determined that the fixing cannot be performed correctly as shown in FIG. Therefore, the gap 15G when correctly fixed is 0.3 mm or more obtained by adding 0.2 mm to 0.1 mm under the conditions 3 and 4. Therefore, the alarm boundary line 15x in FIGS. 19A and 19B may be set using an adjustment mechanism (not shown) built in the proximity sensor 15e so that the distance from the proximity sensor 15e is 0.3 mm.

  As described above, the detection block 15d and the proximity sensor 15e shown in FIG. 18 measure and control the movement distance from the standby position (FIG. 12) to the main body W1x of the workpiece W1 (FIG. 12). The unit 17 can detect that the posture of the workpiece W1 in the photoelectric characteristic inspection unit 10 is inclined when the measured distance is larger than a predetermined distance.

  There are other factors that cause the posture of the workpiece W1 in the workpiece accommodation hole 3 in the photoelectric property inspection unit 10 to be inclined due to the manufacturing deviation of the main body W1x of the workpiece W1 as described above. This will be described with reference to FIGS. FIG. 20A is an enlarged plan view in the vicinity of the workpiece W1 in FIG. However, for simplicity, the light emitter W1p of the workpiece W1 is not shown. FIG. 20A shows a state where the pusher 15 has advanced in the direction of the arrow M1 and the tip surface 15as of the contact portion 15a has contacted the surface W1s1 of the main body W1x of the workpiece W1. Here, the surface W1s1 of the main body W1x is not completely parallel to the front end surface 15as of the abutting portion 15a of the pusher 15 that abuts on the surface W1x of the main body W1x of the workpiece W1 described above. When these non-parallel two surfaces W1s1 and 15as come into contact with each other, a substantially V-shaped gap gradually opening from one end of the surfaces to the other end is generated. In the case of FIG. 20 (a), the front end surface 15as of the abutting portion 15a abuts behind the rotation direction (arrow A direction) of the transport table 2 on the surface W1s1 of the main body W1x, and the pusher 15 in the direction of arrow M1 there. The advance output FX2 generated by the advance to is concentratedly applied. A substantially V-shaped gap is formed between the front end surface 15as and the surface W1s1 so that the gap gradually becomes β1 in the rotation direction (arrow A direction) of the transport table 2.

  By the way, the abutting portion 15a of the pusher 15 is formed to be thick in a direction parallel to the paper surface and thin in a direction perpendicular to the paper surface, and is formed thick between the two surfaces of the tip surface 15as and the surface W1s1 as described above. A substantially V-shaped gap is formed along the formed direction. Therefore, in FIG. 20A, the region V2 where the tip surface 15as contacts the surface W1s1 is pressed by the advance output FX2, but the region V3 where it does not contact is not pressed at all. In other words, the work W1 is fixed only at the rear in the rotation direction (arrow A direction) of the transfer table 2.

  FIG. 20B shows a case where the surface W1s2 of the main body W1x is not completely parallel to the pressing surface 5s of the table chip 5 in contact therewith. In FIG. 20 (b), a substantially V-shaped gap is formed between the pressing surface 5s and the surface W1s2 so that the gap gradually becomes β2 in the rotation direction of the transfer table 2 (arrow A direction). ing. Then, for the same reason as in FIG. 20A, the region V4 where the pressing surface 5s and the surface W1s2 are in contact is pressed by the advance output FX3, but the region V5 that is not in contact is not pressed at all. And only the back of the rotation direction (arrow A direction) of the conveyance table 2 is fixed to the workpiece W1.

  In this way, the state when the probes P1a and P1b shown in FIG. 11 are raised in the direction of the arrow K1 with respect to the workpiece W1 in which only the rear side of the rotation direction of the transfer table 2 (arrow A direction) is fixed is shown in FIG. FIGS. 21A and 21B are perspective views seen from the center axis 4 (FIG. 1) side of No. 2. FIG. 21A shows a state in which the probe P1b in the probe passage 10c is at the standby position in the table base 1 in the state of FIG. At this time, the probe P1a in the probe passage 10b is hidden behind the probe passage 10c and the probe P1b, but is in a standby position like the probe P1b.

  Similarly, the electrode W1a of the workpiece W1 is hidden behind the electrode W1b and cannot be seen.

  Further, the inspection section switching valve 21 selects the v side, that is, the vacuum generation source 22 side, and the inside of the suction / injection passage 10a is vacuum-sucked in the direction of the arrow S3. The work W1 is attracted to the upper surface of the table base 1 by the action of vacuum suction in the direction of the arrow S3. At this time, the vacuum pressure gauge 24 measures the degree of vacuum of the suction passage 22x, and the measured value is a value indicating a sufficiently high degree of vacuum due to the above-described adsorption action.

  Next, from this state, the probes P1a and P1b rise in the direction of the arrow K1 in FIG. 21B, and come into contact with the electrodes W1a and W1b of the workpiece W1. At this time, as described above, the work W <b> 1 is fixed by the contact portion 15 a of the pusher 15 only in the rear side in the rotation direction (arrow A direction) of the transfer table 2. For this reason, when the probe P1b rises and contacts the electrode W1b of the workpiece W1, the side on which the workpiece W1 is not fixed, that is, the front side of the arrow A in FIG. At this time, as in FIG. 17, the probes P <b> 1 a and P <b> 1 b have entered the work storage hole 3 and stopped. In FIG. 21 (b), the electrode W1b and the probe P1b are not in contact correctly, and similarly, the electrode W1a and the probe P1a (not shown) are not in contact correctly. For this reason, correct measurement cannot be performed.

  In order to detect such a state of FIG. 21B, a vacuum pressure gauge 24 is disposed. As described above, in FIG. 21A, the work W1 is attracted to the upper surface of the table base 1 by the action of vacuum suction in the direction of the arrow S3. For this reason, the measured value of the degree of vacuum of the suction passage 22x by the vacuum pressure gauge 24 is sufficiently high. In contrast, in FIG. 21B, the bottom surface of the work W <b> 1 is separated from the top surface of the table base 1. For this reason, the atmosphere enters the suction passage 22x from the suction injection passage 10a via the inspection section switching valve 21. And the measured value of the vacuum degree of the suction passage 22x by the vacuum pressure gauge 24 becomes low. When this measured value is lower than a predetermined vacuum level, the vacuum pressure gauge 24 issues a vacuum alarm VARM and sends it to the control unit 17 shown in FIG.

  As described above, when the degree of vacuum of the suction passage 22x is measured by the vacuum pressure gauge 24 shown in FIG. 12, and the measured degree of vacuum is lower than the predetermined degree of vacuum, the control unit 17 performs the photoelectric characteristic inspection. It is detected that the posture of the workpiece W1 in the unit 10 is inclined.

  In the above description, as shown in FIGS. 20A and 20B, the surface W1s1 or the surface W1s2 of the workpiece W1 is behind (in FIG. Only the region V2 in a) and the region V4) in FIG. 20B are fixed by the contact portion 15a of the pusher 15.

  However, depending on the manufacturing deviation of the main body W1x of the workpiece W1, the side where the substantially V-shaped gap shown in FIGS. 20A and 20B opens to β1 or β2 is behind the rotation direction (arrow A direction) of the transport table 2 ( In some cases, the region V2 side in FIG. 20A and the region V4 side in FIG. In that case, on the surface W1s1 or the surface W1s2, the pusher 15 is only the front (region V3 in FIG. 20A and region V5 in FIG. 20B) in the rotation direction (arrow A direction) of the transport table 2 on each surface. It is fixed by the contact part 15a. In this state, when the probe P1b rises and contacts the electrode W1b of the workpiece W1 as shown in FIG. 21B, the workpiece W1 moves upward on the rear side of the arrow A in FIG. Also in that case, if the degree of vacuum of the suction passage 22x is measured by the vacuum pressure gauge 24 shown in FIG. 12, the control unit 17 can be used when the measured degree of vacuum is lower than a predetermined degree of vacuum for the reason described above. It is detected that the posture of the workpiece W1 in the photoelectric property inspection unit 10 is inclined.

  As described above, the workpiece characteristic measuring apparatus 100 according to the present invention causes the workpiece W1 due to the manufacturing deviation of the main body W1x of the workpiece W1 when the workpiece W1 is fixed by the action of the pusher 15 in the photoelectric characteristic inspection unit 10. The inclination of the posture in the storage hole 3 is detected by two types of measurement, that is, measurement of the movement distance of the pusher 15 and measurement of the degree of vacuum of the suction passage 22x. For this reason, the inclination of the attitude | position in the workpiece | work storage hole 3 of the workpiece | work W1 can be detected reliably.

  As described above, when the detection block 15d and the proximity sensor 15e shown in FIG. 18 or the vacuum pressure gauge 24 shown in FIG. 12 detects that the posture of the work W1 in the photoelectric characteristic inspection unit 10 is inclined, the pusher alarm PALM or A vacuum alarm VAL is issued and transmitted to the control unit 17. When the control unit 17 receives these alarms, the control unit 17 controls to discharge the workpiece W1 from the workpiece storage hole 3. The operation will be described with reference to FIGS.

  FIG. 22A shows the front end surface of the abutting portion 15a of the pusher 15 in which the surface W1s1 of the main body W1x of the workpiece W1 abuts as described with reference to FIGS. 16A, 16B, and 16C. A state in which the workpiece storage hole 3 is inclined due to being not completely parallel to 15as is shown. FIG. 22B is a view of FIG. 21A as viewed from the central axis 4 (FIG. 1) side of the transfer table 2.

  22A and 22B, the front end surface 15as of the abutting portion 15a of the pusher 15 enters the lower side of the work W1 and stops. Further, the probes P1a and P1b are raised in the direction of the arrow K1 and enter the work storage hole 3 and stop. The posture of the workpiece W1 is inclined in the workpiece storage hole 3. In the lower part of FIG. 22A, an enlarged view of the vicinity of the detection block 15d and the proximity sensor 15e (area V1) in FIG. This figure is the same as FIG. 19B, and the alarm sending unit 15e1 in the proximity sensor 15e issues a pusher alarm PALM. FIG. 22B shows a state in which the suction / injection passage 10a communicates with the vacuum generation source 22 by the action of the inspection unit switching valve 21, and the suction / injection passage 10a is vacuum-sucked in the direction of the arrow S3. Also shown.

  In this state, under the control of the control unit 17 (FIG. 1) that has received the pusher alarm PALM, the state shown in FIGS. That is, the pusher 15 retreats in the direction of the arrow M2 and stops at the standby position by the action of a drive mechanism (not shown). The probes P1a and P1b are lowered in the direction of the arrow K2 and stopped at the standby position by the action of a drive mechanism (not shown). At this time, since the pusher 15 retreats to the standby position, the alarm sending unit 15e1 in the proximity sensor 15e stops issuing the pusher alarm PALM. This situation is also shown in the lower part of FIG. This figure is the same as FIG.

  As described above, when the pusher 15 and the probes P1a and P1b are both stopped at the standby position, the work W1 in the work storage hole 3 is formed on the bottom surface thereof as shown in FIGS. The electrodes W1a and W1b are placed on the upper surface of the table base 1.

  Next, under the control of the control unit 17 shown in FIG. 1, a measuring instrument (not shown) located immediately above the photoelectric characteristic inspection unit 10 is raised by the action of a driving mechanism (not shown) and stops at a retracted position (not shown).

  1 moves forward in the direction of the arrow L1 from the standby position shown in FIG. 1 by the action of a drive mechanism (not shown) as the forced discharge means shown in FIG. It stops immediately above the optoelectric characteristic inspection unit 10 that has been on. This is shown in FIG.

  Here, FIGS. 24 to 27 are views of the photoelectric characteristic inspection unit 10 as viewed from the central axis 4 (FIG. 1) side of the transport table 2, as in FIG. 23 (b). In FIG. 24, the discharge head 16 a of the posture defective work discharge unit 16 that sucks the work W <b> 1 is located immediately above the photoelectric characteristic inspection unit 10. A discharge passage 16ap of the discharge head 16a is connected to a discharge pipe 16b, and a storage box 25 is connected to a terminal portion of the discharge pipe 16b. At a position where the discharge pipe 16 b is connected to the storage box 25, a passage sensor 26 is disposed as a discharge detection unit that detects that the discharged work W <b> 1 is stored in the storage box 25.

  Next, as shown in FIG. 25, the inspection unit switching valve 21 selects the a side, that is, the compressed air source 23 side, under the control of the control unit 17 from the state of FIG. As a result, the communication destination of the suction injection passage 10a becomes the compressed air source 23, and the compressed air is injected into the suction injection passage 10a in the direction of the arrow J2. At the same time, a path from the discharge passage 16ap to the storage box 25 via the discharge pipe 16b through the action of a vacuum suction mechanism (not shown) arranged in the posture defective work discharge unit 16 is directed to the storage box 25 by an arrow S4. Vacuum sucked in the direction. The jet of compressed air in the direction of arrow J2 and the vacuum suction in the direction of arrow S4 act simultaneously, and the work W1 in the work storage hole 3 enters the discharge passage 16ap of the discharge head 16a. Then, as shown in FIG. 26, it enters the discharge pipe 16b and is stored in the storage box 25 as shown in FIG.

  In FIG. 27, the passage sensor 26 detects that the workpiece W1 has been stored in the storage box 25, and issues storage information DIS. The storage information DIS is transmitted to the control unit 17 shown in FIG. 1, and the control unit 17 controls the inspection unit switching valve 21 to select the v side, that is, the vacuum generation source 22 side.

  As a result, the communication destination of the suction / injection passage 10a becomes the vacuum generation source 22, and the suction / injection passage 10a is sucked in the direction of arrow S3. Then, the poor posture workpiece discharge unit 16 located immediately above the photoelectric characteristic inspection unit 10 moves out in the direction of the arrow L2 and stops at the standby position in FIG. Then, a measuring instrument (not shown) that has been stopped at a retracted position (not shown) is lowered by the action of a driving mechanism (not shown) and stops immediately above the photoelectric characteristic inspection unit 10. Next, under the control of the control unit 17, the transfer table 2 rotates in the direction of arrow A, and the next workpiece storage hole 3 that stores the workpiece W <b> 1 reaches the photoelectric characteristic inspection unit 10. And about this workpiece | work W1, the measurement of the above-mentioned electrical property and optical property is performed.

  The explanation about the discharge of the work W1 by the poor posture work discharge unit 16 in the photoelectric characteristic inspection unit 10 is a diagram in which the work W1 in the work storage hole 3 is subjected to the processes of FIGS. 16 (a), 16 (b), and 16 (c). The test was performed when the posture was inclined as in FIG. On the other hand, when the work W1 in the work storage hole 3 is tilted as shown in FIG. 21B through the process of FIG. 21A from FIG. 20A or 20B, FIG. As shown in FIGS. 23A and 23B, the pusher 15 and the probes P1a and P1b are withdrawn from the state of 21 (b) and returned to the respective standby positions. The electrodes W1a and W1b formed on the bottom surface are placed on the top surface of the table base 1.

  As described above, when the workpiece W1 is fixed by the action of the pusher 15 provided in the photoelectric characteristic inspection unit 10, the workpiece characteristic measuring apparatus 100 stores the workpiece due to the manufacturing deviation of the main body W1x of the workpiece W1. When it is detected that the posture is inclined in the hole 3, the workpiece W <b> 1 that has reached the photoelectric characteristic inspection unit 10 can be inspected after the workpiece W <b> 1 is discharged as a posture defective workpiece. For this reason, it is possible to quickly eject a defective posture workpiece and inspect a normal workpiece. Further, it is not necessary for the operator to manually discharge the defective workpiece. Accordingly, it is possible to improve the inspection efficiency and inspection accuracy and reduce the operation time of the worker.

  In the above description, the example of the photoelectric characteristic inspection unit 10 is shown as the characteristic inspection unit for inspecting the workpiece W1, but the first image inspection unit 8 and the second image inspection unit 9 are not limited to this and are used as the characteristic inspection unit. May be used.

  Further, in the above description, as the discharge unit that discharges the workpiece W1 that has been inspected, the defective product discharge unit 11 that discharges the workpiece W1 whose result of each inspection is defective from the workpiece storage hole 3, and each of the inspections. Although the example which provided two of the good quality discharge parts 12 which discharge | emit the workpiece | work W1 which was the result of non-defective goods from the workpiece | work storage hole 3 was shown, it replaces with the good quality discharge part 12, and is based on an inspection result. A classification discharge unit that classifies the workpiece W1 into a plurality of grades and discharges them into a storage box corresponding to each grade may be arranged.

  In the above description, the example in which the transport table 2 is installed horizontally is shown. However, the present invention is not limited to this, and the present invention is installed in a case where the transport table 2 is installed vertically or in an inclined manner. It can also be applied when

  In the above description, an example in which one probe P1a and P1b is brought into contact with each of the electrodes W1a and W1b of the workpiece W1 in the photoelectric property inspection unit 10 is not limited thereto. The electrodes W1a and W1b can also be applied to the four-terminal measurement in which two probes are brought into contact with each other.

  As described above, according to the present embodiment, the table chip 5 is formed adjacent to the work storage hole 3 on the table base 1 side on the center side at the position of the work storage hole 3 of the transfer table 2. The high hardness portion of the workpiece W1 is pressed from the outside of the transfer table 2 by the pusher 15 to the pressing surface 5s that protrudes into the workpiece housing hole 3, and is fixed during characteristic measurement. For this reason, the light emitter, which is the low hardness portion of the workpiece W1, does not come into contact with any place during fixing, and it is possible to prevent the press from being damaged. Further, the posture inclination of the workpiece W1 caused by the manufacturing deviation of the workpiece W1 at the time of pressing can be reliably detected by two types of measurement including the movement distance measurement of the pusher 15 and the vacuum degree measurement in the suction passage 22x. it can. Further, since the workpiece W1 in which the posture inclination is detected is discharged by the posture defective workpiece discharge unit 16 and the next workpiece is inspected, it is possible to improve the inspection efficiency and the inspection accuracy and reduce the operation time of the worker.

DESCRIPTION OF SYMBOLS 1 Table base, 2 Conveyance table, 3 Work storage hole, 4 Center axis, 5 Table chip, 5s Pressing surface, 6 Linear feeder, 7 Separation supply part, 8 1st image inspection part, 9 2nd image inspection part, 10 light Electrical property inspection section, 10a suction injection passage, 11 defective product discharge section, 12 non-defective product discharge section, 13 table cover, 14 table guide, 15 pusher, 15a abutment section, 15d detection block, 15e proximity sensor, and 16 posture defective work discharge 16a discharge head, 16b discharge pipe, 17 control unit, 18 vacuum generation source, 19 discharge unit switching valve, 20 compressed air source, 21 inspection unit switching valve, 22 vacuum generation source, 23 compressed air source, 24 vacuum pressure gauge, 25 storage box, 26 passage sensor, P1a, P1b probe, W1 work, W1x body, W1p light emitter W1a, W1b electrode.

Claims (6)

In the workpiece characteristic measuring device for measuring the properties of a workpiece having a high hardness portion and a low hardness portion,
Table base,
A transport table that is rotatably arranged on the table base, has an opening that opens outward, and is provided with a plurality of workpiece storage holes along the outer peripheral edge for storing workpieces;
A workpiece characteristic inspection unit that is fixedly provided at an arbitrary position along the outer periphery of the transfer table, and that measures a property of the workpiece stored in the workpiece storage hole;
The workpiece property inspection unit includes an inspection member that abuts against the workpiece and inspects the workpiece property, and a fixing unit that fixes the workpiece in the workpiece storage hole toward the inner wall of the workpiece storage hole facing the opening. Have
The fixing means comprises a pusher that presses the high hardness portion of the workpiece from the opening toward the inner wall side,
The workpiece characteristic inspection unit is a distance measurement unit that measures the movement distance of the pusher, and when the movement distance measured by the distance measurement unit is larger than a predetermined distance, further word over click characteristic measuring apparatus characterized by having a forced discharge means for discharging the workpiece.   The workpiece characteristic inspection unit includes a suction passage that is provided on the table base and sucks the workpiece toward the table base, a vacuum degree measurement unit that measures the degree of vacuum in the suction passage, and a vacuum measured by the vacuum degree measurement unit. 2. The workpiece characteristic measuring apparatus according to claim 1, further comprising forced discharge means for discharging the workpiece in the workpiece storage hole by the control unit when the degree is lower than a predetermined vacuum degree. The forced discharge means is characteristic measuring device of a work according to claim 1 or 2, wherein the containing discharge detecting means for detecting that the workpiece workpiece storage hole is discharged. In the workpiece characteristic measuring method for measuring the properties of a workpiece having a high hardness portion and a low hardness portion,
A conveying step of conveying the workpiece by a conveying table that is rotatably arranged on the table base and has an opening that opens outward, and a plurality of workpiece accommodating holes that accommodate the workpiece are provided along the outer peripheral edge;
A workpiece characteristic inspection step that is fixedly provided at an arbitrary position along the outer periphery of the transfer table, and that performs a workpiece property inspection performed by a workpiece property inspection unit in the workpiece storage hole,
The workpiece characteristic inspection step includes a workpiece fixing step in which the workpiece in the workpiece storage hole is fixed by a fixing means toward the inner wall side facing the opening of the workpiece storage hole, and the workpiece property inspection is performed in contact with the workpiece. And an inspection process for inspecting the characteristics of the workpiece by the inspection member performing
The fixing means comprises a pusher that presses the high hardness portion of the workpiece from the opening toward the inner wall side,
The workpiece characteristic measurement step includes a distance measurement step for measuring the movement distance of the pusher, and a movement by the control unit when the movement distance measured by the distance measurement step is larger than a predetermined distance. further characteristic measuring method of the word over click, characterized in that it comprises a forced discharge step of discharging the workpiece. The workpiece characteristic measurement step includes a suction step for sucking a workpiece toward the table base by a suction passage provided in the table base, a vacuum degree measurement step for measuring the degree of vacuum in the suction passage, and a vacuum degree measurement step. 5. The workpiece characteristic according to claim 4 , further comprising a forcible discharge step of discharging the workpiece in the workpiece storage hole by the control unit when the measured vacuum level is lower than a predetermined vacuum level. Measuring method. The forced discharge process, according to claim 4 or 5 characteristic measuring method of the work according to comprising the discharge detection step of detecting that the workpiece workpiece storage hole is discharged.

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