TWI882270B - Parts screening device - Google Patents

Abstract

The subject of the present invention is to provide a component screening device that suppresses the decrease in the accommodation of electronic components in a box. The component screening device 1 includes: conveying mechanisms 10 and 20, which convey components; an imaging device 30 or a measuring device 40, wherein the imaging device 30 photographs the appearance of the components on the conveying mechanism 20, and the measuring device 40 measures the electrical characteristics of the components on the conveying mechanism 10; an inspection and screening controller 80, which screens good products based on the results of the component appearance inspection based on the imaging results from the imaging device 30, or the results of the component electrical characteristics inspection based on the measurement results from the measuring device 40; and an ejection mechanism 50, which ejects the screened good products from the conveying mechanism 20 and accommodates them in a box. The discharge mechanism 50 includes: a tubular member 52, which guides the good parts discharged from the conveying mechanism 20 to the entrance and exit of the box; an air supply mechanism 53, which is arranged on the upstream side of the tubular member 52 and supplies air for increasing the conveying force of the parts; and an air discharge mechanism 55, which is arranged on the downstream side of the tubular member 52 and discharges the air.

Description

Parts screening device

The present invention relates to a parts screening device.

There is a device for screening good and defective surface-mount electronic components (also called chip components) such as multilayer ceramic capacitors. In Patent Document 1, a visual inspection device is disclosed as such a component screening device. The visual inspection device disclosed in Patent Document 1 includes: a linear feeder (transport mechanism) that transports electronic components; a turntable (transport mechanism) that transports electronic components transported by the linear feeder; and a camera that photographs the electronic components on the turntable; and the electronic components are transported while visually inspecting the electronic components. In this way, good and defective products can be screened and discharged.

Furthermore, Patent Document 1 discloses an external inspection device in which electronic components are charged by using vibration to transport electronic components in a linear feeder, and the electronic components are transported by electrostatic adsorption by static electricity in a turntable. [Prior Technical Document] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2017-44579

[The problem that the invention wants to solve]

In such a parts screening device, the discharged good electronic parts are sometimes guided to the entrance of a box by a tubular member and stored in the box. In this case, an air supply mechanism for supplying air is sometimes provided on the upstream side of the tubular member in order to increase the conveying force of the electronic parts, for example, to prevent the electronic parts from being left in the tubular member.

Furthermore, the box is a box-shaped box with only one inlet and outlet. When such a box is combined with the tubular member having the above-mentioned air supply mechanism, since air is continuously supplied to the inlet and outlet of the box, and there is no outlet for air to enter the box, the electronic components cannot enter the box. As a result, the accommodation of the electronic components in the box is reduced.

The purpose of the present invention is to provide a component screening device that suppresses the decrease in the containment of electronic components in a box. [Technical means to solve the problem]

The parts screening device of the present invention is a parts screening device that inspects and screens good parts while conveying the parts and stores the parts in a box. The box is box-shaped and has only one entrance and exit. The aforementioned parts screening device includes: a conveying mechanism, which conveys the aforementioned parts; an imaging device or a measuring device, wherein the imaging device photographs the appearance of the aforementioned parts on the aforementioned conveying mechanism, and the measuring device measures the electrical characteristics of the aforementioned parts on the aforementioned conveying mechanism; an inspection and screening controller, which performs an appearance inspection of the aforementioned parts based on the imaging result from the aforementioned imaging device, or performs an electrical characteristics inspection of the aforementioned parts based on the measurement result from the aforementioned measuring device, and screens good products based on the result of the aforementioned appearance inspection or the result of the aforementioned electrical characteristics inspection; and a discharge mechanism, which discharges the good products screened by the aforementioned inspection and screening controller from the aforementioned conveying mechanism and accommodates them in the aforementioned box. The aforementioned discharge mechanism includes: a tubular member, which guides the aforementioned parts of the good products discharged from the aforementioned conveying mechanism to the aforementioned inlet and outlet of the aforementioned box; an air supply mechanism, which is arranged on the upstream side of the aforementioned tubular member and supplies air for increasing the conveying force of the aforementioned parts; and an air discharge mechanism, which is arranged on the downstream side of the aforementioned tubular member and discharges the aforementioned air. [Effects of the invention]

According to the present invention, it is possible to suppress the decrease in the accommodation capacity of the box for the electronic components of the component screening device.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, in each of the drawings, the same or corresponding parts are given the same symbols.

FIG1A is a schematic plan view of an example of a part screening device of the present embodiment as viewed from above, and FIG1B is a schematic plan view of another example of a part screening device of the present embodiment as viewed from above. FIG2 is a schematic plan view of an enlarged portion II of the part screening device shown in FIG1A or FIG1B. FIG3A is a schematic side view of the part screening device shown in FIG1A as viewed from the side, and is a schematic side view of an enlarged portion II, and FIG3B is a schematic side view of the part screening device shown in FIG1B as viewed from the side, and is a schematic side view of an enlarged portion II. FIG4 is a cross-sectional view of the part screening device shown in FIG1A or FIG1B taken along line IV-IV. Furthermore, in FIGS. 1A to 4, an XY orthogonal coordinate system is shown.

The parts screening device 1 shown in Fig. 1A, Fig. 2, Fig. 3A and Fig. 4 is a device that sequentially transports a plurality of electronic parts 3 while inspecting them, and screens good products and stores them in a box 5. The parts screening device 1 includes: a linear feeder 10, a turntable 20, a plurality of imaging devices 30, a measuring device 40, a first discharge mechanism 50, a second discharge mechanism 60, a first counter 71, a second counter 72, and an inspection and screening controller 80. Furthermore, the linear feeder 10 and the turntable 20 constitute the transport mechanism of the present invention, and the first discharge mechanism 50 constitutes the discharge mechanism of the present invention. In addition, it may be a form that only includes either the imaging device 30 or the measuring device 40.

The electronic component 3 is a surface-mount electronic component such as a multilayer ceramic capacitor (also called a chip component). The electronic component 3, for example, as shown in FIG. 5, includes: a multilayer body 3a, which is laminated with a plurality of dielectric layers and one or more conductive layers including ceramic materials; and two external electrodes 3b, which are arranged on each of the two end faces of the multilayer body 3a. The multilayer body 3a, that is, the electronic component 3, is in the shape of a rectangular parallelepiped, and has two main surfaces TS1 and TS2 opposite to each other in the stacking direction, two side surfaces WS1 and WS2 opposite to each other in the width direction intersecting the stacking direction, and two end surfaces LS1 and LS2 opposite to each other in the length direction intersecting the stacking direction and the width direction.

The box 5 is a box-shaped box, for example, as shown in Fig. 6, and contains a plurality of electronic components 3. The box 5 has an entrance 5a, which can be opened when the electronic components 3 are received and taken out, and can be closed when the electronic components 3 are stored.

1A, 2 and 3A, the linear feeder 10 sequentially and linearly transports a plurality of electronic components 3. The linear feeder 10 may include a charging portion on the upstream side and an electrostatic adsorption portion on the downstream side.

The linear feeder 10 is preferably made of a material such as SUS. Furthermore, the linear feeder 10 is preferably tilted relative to a horizontal plane. Thus, the electronic component 3 can be charged by conveying the electronic component 3 by utilizing vibration at the charged portion on the upstream side of the linear feeder 10.

As shown in Fig. 1A and Fig. 3A, it is preferable to provide an electrostatic adsorption mechanism 12 below the electrostatic adsorption portion on the downstream side of the linear feeder 10. Thus, the electronic component 3 can be electrostatically adsorbed and transported at the electrostatic adsorption portion on the downstream side of the linear feeder 10.

1B and 3B, the electrostatic adsorption mechanism 12 may not be provided on the linear feeder 10. That is, the entire linear feeder 10 from the upstream side to the downstream side may be the above-mentioned charged portion.

The turntable 20 sequentially rotates and transports the plurality of electronic components 3 transported by the linear feeder 10. As shown in FIG. 1A and FIG. 2, the turntable 20 has a guide mechanism 22 on the upstream side, and the guide mechanism 22 guides the electronic components 3 from the linear feeder 10 to the rotation transport track 21. The turntable 20 transports the electronic components 3 along the rotation transport track 21.

As shown in Fig. 3A, it is preferable to provide an electrostatic adsorption mechanism 24 under the turntable 20. Thereby, the electronic component 3 can be electrostatically adsorbed and transported.

The conveying speed of the turntable 20 is faster than the conveying speed of the linear feeder 10. The rotation speed of the turntable 20 is preferably 10,000 rpm or more. In this way, as shown in FIG. 2 and FIG. 3A, the spacing of the electronic component 3 can be spaced, and the end surface side of the electronic component 3 can be inspected. Furthermore, it can be not more than 10,000 rpm, but more than 9,000 rpm, and can also be more than 8,000 rpm. At this time, the length dimension of the electronic component 3 is 0.25 mm ± 10%, and the width dimension and thickness dimension are about 0.125 mm ± 13%.

The turntable 20 is made of materials such as glass or resin and has transparency, so that the back side of the electronic component 3 can be inspected.

As shown in FIG1A , the imaging device 30 is, for example, a camera. Six imaging devices 30 are arranged along the rotation conveying track 21 of the turntable 20 . The six imaging devices 30 respectively photograph the six outer surfaces of the electronic component 3 on the turntable 20 , namely, the two main surfaces TS1 and TS2 , the two side surfaces WS1 and WS2 , and the two end surfaces LS1 and LS2 .

The measuring device 40, for example, includes a pair of probes for contacting the external electrodes of the electronic component 3 to measure the electrical characteristics of the electronic component 3. As shown in FIG1A, the measuring device 40 can be disposed in the electrostatic adsorption portion on the downstream side of the linear feeder 10. Alternatively, as shown in FIG1B, the measuring device 40 can also be disposed along the rotating conveying track 21 of the turntable 20. In this case, as described above and as shown in FIG3B, the electrostatic adsorption mechanism 12 may not be disposed on the linear feeder 10. The measuring device 40 measures the electrical characteristics of the electronic component 3 on the linear feeder 10 or on the turntable 20. For example, when the electronic component 3 is a multilayer ceramic capacitor, the measuring device 40 measures the capacitance of the electronic component 3.

As described above, the electrostatic adsorption part or the turntable 20 on the downstream side of the linear feeder 10 that performs the measurement of the electrical characteristics by the measuring device 40 transports the electronic components 3 while electrostatically adsorbing them. This can improve the accuracy of the measurement of the electrical characteristics.

As shown in FIG. 1A and FIG. 4 , the first discharge mechanism 50 discharges the good products selected by the inspection and screening controller 80 described later based on the results of the appearance inspection or the results of the electrical characteristics inspection from the turntable 20 and stores them in the box 5. The first discharge mechanism 50 is not particularly limited to the method of discharging the good products, and air blowing, air suction, physical contact and pushing, etc. can be cited. For example, when the good products are conveyed, the first discharge mechanism 50 blows air to the good products on the turntable 20 according to the instructions from the inspection and screening controller 80, and takes the good products from the turntable 20 into the interior.

The first exhaust mechanism 50 includes a tubular member 52 , an air supply mechanism 53 , a funnel-shaped member 54 , and an air exhaust mechanism 55 .

The tubular member 52 is a tubular member with a circular or polygonal cross section, and extends from the turntable 20 to the entrance and exit of the box 5. Thus, the tubular member 52 guides the good electronic components 3 discharged from the turntable 20 to the entrance and exit 5a of the box 5.

The tubular member 52 extends from the upstream side to the downstream side in a gradually lowered position. Thus, the electronic component 3 is guided to the box 5 by gravity. For example, the tubular member 52 has a portion extending obliquely relative to the vertical direction. In this case, the electronic component 3 rolls on the inner wall of the tubular member 52 and is guided to the box 5. Alternatively, the tubular member 52 has a portion extending along the vertical direction. In this case, the electronic component 3 falls freely and is guided to the box 5.

The air supply mechanism 53 is disposed on the upstream side of the tubular member 52, and supplies air for increasing the conveying force of the electronic components 3. For example, the air supply mechanism 53 supplies air from the side surface of the tubular member 52 downward.

The funnel-shaped member 54 is a funnel-shaped member with a circular cross section or a polygonal cross section, and is disposed between the tubular member 52 and the inlet and outlet of the box 5 .

The air discharge mechanism 55 is disposed on the funnel-shaped member 54, in other words, on the downstream side of the tubular member 52. Thus, the air discharge mechanism 55 discharges the air.

For example, the air exhaust mechanism 55 is an opening disposed on the upper surface of the funnel-shaped member 54 at the periphery of the tubular member 52. The opening is preferably smaller than the outer dimensions of the electronic component 3. Alternatively, when the opening is larger than the outer dimensions of the electronic component 3, it is preferred to provide a mesh-like member having a mesh smaller than the outer dimensions of the electronic component 3 at the opening. In this way, the electronic component 3 can be prevented from being discharged from the opening, and only air can be discharged.

Alternatively, the air exhaust mechanism 55 may have a suction mechanism such as vacuum suction. In this case, for example, the air exhaust mechanism 55 sucks air from the upper surface or side of the funnel-shaped member 54. The suction port of the suction mechanism is preferably smaller than the outer dimensions of the electronic component 3. Alternatively, when the suction port of the suction mechanism is larger than the outer dimensions of the electronic component 3, it is preferred to provide a mesh member having a smaller mesh than the outer dimensions of the electronic component 3 at the suction port of the suction mechanism. In this way, the electronic component 3 can be prevented from being discharged from the suction port of the suction mechanism, and only air can be discharged.

The second discharge mechanism 60 discharges the defective products screened out by the inspection and screening controller 80 described later based on the results of the appearance inspection or the results of the electrical characteristics inspection from the turntable 20 and collects them in a collection box (not shown). The method of discharging defective products by the second discharge mechanism 60 can be the same as the method of discharging good products by the first discharge mechanism 50. For example, when defective products are transported, the second discharge mechanism 60 blows air on the defective products on the turntable 20 according to the instructions from the inspection and screening controller 80, and takes the defective products from the turntable 20 into the interior.

The second discharge mechanism 60 has a tubular member similar to the first discharge mechanism 50 , and guides the defective products discharged from the turntable 20 to a collection box (not shown). The second discharge mechanism 60 is preferably disposed upstream of the first discharge mechanism 50 .

As shown in FIG. 1A and FIG. 4 , the first counter 71 counts the good products discharged from the turntable 20 by the first discharge mechanism 50. The first counter 71 is disposed on the downstream side of the first discharge mechanism 50, that is, immediately before the box 5. In this way, the good products contained in the box 5 can be accurately counted. Furthermore, the first counter 71 can also be further disposed on the upstream side of the first discharge mechanism 50. In this way, when the count numbers of the two first counters 71 are different, it can be confirmed that the electronic components 3 are left in the first discharge mechanism 50.

The first counter 71 is not particularly limited, and a camera, a photo sensor, an eddy current sensor, etc. can be cited. The eddy current sensor can be any well-known eddy current sensor or eddy current displacement sensor. For example, a high-frequency signal is supplied to the sensor coil from the self-resonance circuit, and a high-frequency magnetic field is generated from the sensor coil. If an electronic component containing metal approaches the magnetic field, eddy current is generated in the metal of the electronic component, and the impedance of the sensor coil changes. In this way, the voltage of the resonant circuit changes. By using a detection circuit to detect the voltage change, the passage of the electronic component can be counted.

The second counter 72 counts the number of defective products discharged from the turntable 20 by the second discharge mechanism 60 (not shown). The second counter 72 may be the same as the first counter 71 .

The inspection and screening controller 80 controls the entire component screening device 1. Specifically, the inspection and screening controller 80 performs an appearance inspection of the electronic component 3 based on the imaging result from the imaging device 30, and screens good and defective products based on the result of the appearance inspection. Alternatively, or further, the inspection and screening controller 80 performs an electrical characteristic inspection (also called verification) of the electronic component 3 based on the measurement result from the measuring device 40, and screens good and defective products based on the result of the electrical characteristic inspection.

Furthermore, the inspection and screening controller 80 controls the discharge of good products by the first discharge mechanism 50. For example, the inspection and screening controller 80 calculates the timing of discharging good products from the first discharge mechanism 50 based on information such as the transport speed of the linear feeder 10, the transport speed (or rotation speed, and the length or radius of the rotation transport track) of the turntable 20, the position of the measuring device 40 in the linear feeder 10 or the turntable 20, and the position of the imaging device 30 in the turntable 20, and issues a command to the first discharge mechanism 50.

Furthermore, the inspection and screening controller 80 controls the discharge of defective products by the second discharge mechanism 60. For example, the inspection and screening controller 80 calculates the timing of discharging defective products from the second discharge mechanism 60 based on information such as the conveying speed of the linear feeder 10, the conveying speed (or rotation speed, and the length or radius of the rotation conveying track) of the turntable 20, the position of the measuring device 40 in the linear feeder 10 or the turntable 20, and the position of the imaging device 30 in the turntable 20, and issues an instruction to the second discharge mechanism 60.

The inspection and screening controller 80 is composed of a computing processor such as a DSP (Digital Signal Processor) or an FPGA (Field-Programmable Gate Array). The various functions of the inspection and screening controller 80 are realized by executing specific software (program) stored in a memory unit, for example. The various functions of the inspection and screening controller 80 can be realized by the cooperation of hardware and software, or by hardware (electronic circuit) alone.

The memory unit in the inspection and screening controller 80 is an overwritable memory such as an EEPROM. The memory unit stores specific software (programs) used to execute various functions of the screening controller. In addition, the memory unit stores various setting values input from the outside. The various setting values include: information related to the transport speed of the linear feeder 10, the transport speed of the turntable 20 (or the rotation speed, and the length or radius of the rotation transport track), the position of the imaging device 30, the position of the measuring device 40, the position of the first discharge mechanism 50, and the position of the second discharge mechanism 60, and the criteria for determining good/defective products, etc.

As described above, the parts screening device 1 according to the present embodiment includes: a linear feeder 10 and a turntable 20 (transport mechanism), which transport electronic parts 3; 6 imaging devices 30, which respectively photograph 6 appearances of the electronic parts 3 on the turntable 20; or a measuring device 40, which measures the electrical characteristics of the electronic parts 3 on the linear feeder 10 or the turntable 20; an inspection and screening controller 80, which performs an appearance inspection of the electronic component 3 based on the image pickup result from the image pickup device 30, or performs an electrical characteristic inspection of the electronic component 3 based on the measurement result from the measurement device 40, and selects good products based on the appearance inspection result or the electrical characteristic inspection result; and a first discharge mechanism 50, which discharges the good products selected by the inspection and screening controller 80 from the turntable 20 and stores them in the box 5. In this way, the appearance inspection or the electrical characteristic inspection can be performed while conveying a plurality of electronic components 3, and good products can be selected and stored in the box 5.

Here, in such a parts screening device, the discharged good electronic parts 3 are guided to the entrance of the box 5 through the tubular member 52 and stored in the box 5. In this case, for example, in order to prevent the electronic parts 3 from remaining in the tubular member 52, an air supply mechanism 53 for supplying air is provided on the upstream side of the tubular member 52 in order to increase the conveying force of the electronic parts 3.

Furthermore, the box 5 is a box-shaped box having only one inlet and outlet 5a. When such a box 5 is combined with the tubular member 52 having the above-mentioned air supply mechanism 53, since air is continuously supplied to the inlet and outlet 5a of the box 5, and there is no outlet for air to enter the box 5, the electronic component 3 cannot enter the box 5. As a result, the accommodation of the electronic component 3 in the box 5 is reduced.

In this regard, according to the component selection device 1 of this embodiment, the first discharge mechanism 50 has an air discharge mechanism 55 disposed on the downstream side of the tubular member 52 for discharging air. Thus, the air supplied from the air supply mechanism 53 can be discharged, and the decrease in the accommodation of the electronic component 3 in the box 5 can be suppressed.

Furthermore, according to the component screening device 1 of the present embodiment, the air exhaust mechanism 55 can be an opening. The opening is preferably smaller than the external dimensions of the electronic component 3. Alternatively, when the opening is larger than the external dimensions of the electronic component 3, it is preferred to set a mesh-like component with a mesh smaller than the external dimensions of the electronic component 3 at the opening. In this way, the electronic component 3 can be prevented from being discharged from the opening, and only air can be discharged.

Furthermore, according to the component screening device 1 of the present embodiment, the air exhaust mechanism 55 may have a suction mechanism. The suction port of the suction mechanism is preferably smaller than the external dimensions of the electronic component 3. Alternatively, when the suction port of the suction mechanism is larger than the external dimensions of the electronic component 3, it is preferred to provide a mesh-like component having a smaller mesh than the external dimensions of the electronic component 3 at the suction port of the suction mechanism. In this way, the electronic component 3 can be prevented from being discharged from the suction port of the suction mechanism, and only air can be discharged.

The above is a description of the implementation of the present invention, but the present invention is not limited to the above implementation, and various changes and modifications can be made. In the above implementation, an example is given of a form including a second discharge mechanism 60 for discharging defective products from the turntable 20. However, the present invention is not limited thereto, and for example, it may be a form that does not include the second discharge mechanism 60. In this case, the parts screening device 1 can immediately discharge defective products from the turntable 20 after the photography and appearance inspection are realized by the imaging device 30. In addition, the parts screening device 1 can also immediately discharge defective products from the linear feeder 10 or the turntable 20 after the measurement and electrical characteristic inspection are performed by the measuring device 40. In this case, a defective product recovery function may be configured on the entire periphery of the turntable 20 and/or the entire side of the linear feeder 10.

In the above embodiment, the inspection and screening controller 80 has the function of performing an appearance inspection of electronic components based on the imaging result from the imaging device 30. However, the present invention is not limited thereto, and each imaging device 30 may also have an appearance inspection function. In addition, each imaging device 30 may also have a function of immediately discharging defective products from the turntable 20 after the appearance inspection, as in the above variation.

In the above-mentioned embodiment, the inspection and screening controller 80 has the function of inspecting the electrical characteristics of the electronic parts based on the measurement results from the measuring device 40. However, the present invention is not limited to this, and each of the measuring devices 40 may also have the function of inspecting the electrical characteristics. In addition, each of the measuring devices 40 may also have the function of discharging defective products from the linear feeder 10 or the turntable 20 immediately after the electrical characteristics inspection, as in the above-mentioned variation.

1: Parts screening device 3: Electronic parts 3a: Laminated body 3b: External electrode 5: Box 5a: Inlet and outlet 10: Linear feeder (transport mechanism) 12: Electrostatic adsorption mechanism 20: Turntable (transport mechanism) 21: Rotary transport track 22: Guide mechanism 24: Electrostatic adsorption mechanism 30: Imaging device 40: Measuring device 50: First discharge mechanism (discharge mechanism) 52: Tubular component 53: Air supply mechanism 54: Funnel-shaped component 55: Air discharge mechanism 60: Second discharge mechanism 71: First counter 72: Second counter 80: Inspection and screening controller II: part IV-IV: line LS1, LS2: end surface TS1, TS2: main surface WS1, WS2: side surface

FIG. 1A is a schematic plan view of an example of a part screening device of the present embodiment as viewed from above. FIG. 1B is a schematic plan view of another example of a part screening device of the present embodiment as viewed from above. FIG. 2 is a schematic plan view of a part II of the part screening device shown in FIG. 1A or FIG. 1B, which is an enlarged schematic plan view. FIG. 3A is a schematic side view of the part screening device shown in FIG. 1A as viewed from the side, and is an enlarged schematic side view of part II. FIG. 3B is a schematic side view of the part screening device shown in FIG. 1B as viewed from the side, and is an enlarged schematic side view of part II. FIG. 4 is a cross-sectional view of the part screening device shown in FIG. 1A or FIG. 1B, taken along line IV-IV. FIG. 5 is a schematic three-dimensional view of the appearance of the part. Figure 6 is a schematic three-dimensional diagram of the box's exterior.

1: Parts screening device

5: Box

10: Linear feeder (conveying mechanism)

12: Electrostatic adsorption mechanism

20: Turntable (transportation mechanism)

21: Rotating conveying track

22: Guidance mechanism

24: Electrostatic adsorption mechanism

30: Imaging devices

40: Measurement device

50: 1st discharge mechanism (discharge mechanism)

52: Tubular components

53: Air supply mechanism

54: Funnel-shaped component

55: Air exhaust mechanism

60: Second discharge mechanism

71: 1st counter

72: 2nd counter

80: Check filter controller

II: Part

IV-IV: Line

Claims (10)

A parts screening device is used to inspect and screen good parts while transporting electronic parts and store them in a box; the box is a box-shaped box that stores a plurality of electronic parts and has only one openable and closable entrance. The entrance is opened to store the electronic parts and is closed after storage. The parts screening device includes: a transport mechanism that transports the electronic parts; and a discharge mechanism that discharges the electronic parts transported by the transport mechanism from the transport box. The electronic components are discharged from the discharge mechanism and stored in the box; and a counter that counts the electronic components discharged from the discharge mechanism; and the discharge mechanism includes: a tubular member that guides the good electronic components discharged from the conveying mechanism to the inlet and outlet of the box; an air supply mechanism that is arranged on the upstream side of the tubular member and supplies air for increasing the conveying force of the electronic components; and an air exhaust mechanism that is arranged on the downstream side of the tubular member and exhausts the air. As in claim 1, the parts screening device, wherein the aforementioned air exhaust mechanism has an opening. As in claim 1, the part screening device, wherein the aforementioned opening is smaller than the outer dimensions of the aforementioned electronic part. As in claim 1, the part screening device, wherein the air exhaust mechanism has a mesh component disposed at the opening and having a mesh size smaller than the outer dimensions of the electronic part. As in claim 1, the parts screening device, wherein the aforementioned air exhaust mechanism has a suction mechanism. As in claim 5, the part screening device, wherein the suction port of the suction mechanism is smaller than the external dimensions of the electronic part. As in claim 1, the part screening device, wherein the air exhaust mechanism has a mesh component with a mesh smaller than the outer dimensions of the electronic part, which is arranged at the suction port of the suction mechanism. As in claim 1, the parts screening device, wherein the aforementioned tubular member extends from the upstream side to the downstream side in a manner where the position gradually becomes lower. As in claim 1, the parts screening device, wherein the aforementioned tubular member has a portion extending obliquely relative to the vertical direction of the lead. As in claim 1, the part screening device, wherein the aforementioned tubular component has a portion extending along the lead vertical direction.