Gas jet blowing device, and electronic part sorting apparatus

Abstract

To provide a gas jet blowing device which suppresses gas from blowing from a jet passage at unintended timing.SOLUTION: A gas jet blowing device 10 comprises: a nozzle body 20; and a selector valve 30. The nozzle body 20 includes: an inflow passage 21; a jet passage 22; and a discharge passage 23. The inflow passage 21 is a passage where gas supplied from a gas supply source circulates. The jet passage 22 is a passage where the gas distributed from the inflow passage 21 is jetted to an outer side. The discharge passage 23 is a passage where the gas in the jet passage 22 is discharged to the outer side. The selector valve 30 is switchable between a first state where the inflow passage 21 and the jet passage 22 are connected and a second state where the jet passage 22 and the discharge passage 23 are connected. When either the jet passage 22 or the discharge passage 23 is a specific passage ST, the specific passage ST includes a circulation resistance part 50 whose passage cross sectional area is smaller than that in other portions in the specific passage ST.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a gas ejection device and an electronic component sorting device. [Background technology]

[0002] The component supply device described in Patent Document 1 includes a gas ejection device. The gas ejection device is capable of ejecting high-pressure gas. The gas ejection device ejects gas when it is determined that the orientation of a component on the conveying path is face down. As a result, the component that is face down is blown off the conveying path. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-273712 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the gas ejection device as described in Patent Document 1, immediately after the ejection of gas from the ejection port is stopped, the pressure in the gas ejection device remains high. Therefore, in this type of gas ejection device, after the ejection of gas from the ejection port is stopped, the gas is ejected from an exhaust port other than the ejection port. At this time, since the gas is forcefully ejected from the exhaust port, the pressure in the gas ejection device may become negative relative to the outside air pressure. If the pressure in the gas ejection device becomes negative, gas may flow into the gas ejection device from the exhaust port, and the pressure in the gas ejection device may become positive. Then, the gas in the gas ejection device may be ejected from the ejection port of the gas ejection device. That is, in the gas ejection device as described in Patent Document 1, the gas may be ejected at a timing when the gas should not be ejected from the gas ejection device. As a result, there is a risk that parts that do not meet the judgment may be removed from the conveying path. To avoid this, it becomes necessary to adjust the speed at which the components are supplied so that the components do not enter the injection range of the gas ejection device while there is a possibility that unintended gas will be ejected from the gas ejection device. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides a gas ejection device comprising: an inlet passage through which gas supplied from a gas supply source flows; an outlet passage through which the gas that has flowed through the inlet passage is ejected to the outside; and an outlet passage through which the gas in the outlet passage is ejected to the outside; and a switching valve capable of switching between a first state in which the inlet passage and the outlet passage are connected to a second state in which the outlet passage and the outlet passage are connected; and when either the outlet passage or the outlet passage is designated as a specific passage, the specific passage has a flow resistance portion whose flow path cross-sectional area is smaller than other portions in the specific passage.

[0006] In addition, in order to solve the above-mentioned problems, the present invention provides an electronic component sorting device comprising: a conveying machine for conveying electronic components; an inspection device for inspecting electronic components conveyed by the conveying machine; and a gas ejection device located downstream of the inspection device in the conveying direction of the conveying machine and ejecting gas based on inspection results of the inspection device, wherein the gas ejection device comprises a nozzle body having an inflow passage through which the gas supplied from a gas supply source flows, an ejection passage for ejecting the gas flowing from the inflow passage to the outside, and an exhaust passage for exhausting the gas in the ejection passage to the outside, and a switching valve capable of switching between a first state in which the inflow passage and the ejection passage are connected and a second state in which the ejection passage and the exhaust passage are connected, and wherein when either the ejection passage or the exhaust passage is designated as a specific passage, the specific passage has a flow resistance portion whose flow path cross-sectional area is smaller than other portions in the specific passage. Effect of the Invention

[0007] According to the above configuration, it is possible to prevent gas from being ejected from the ejection passage at an unintended timing. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of an electronic component sorting device to which the gas ejection device is applied. [Diagram 2] FIG. 2 is a schematic diagram of the gas ejection device in a first state. [Diagram 3] FIG. 3 is a schematic diagram of the gas ejection device in the second state. [Figure 4] FIG. 4 is a schematic diagram of the flow resistance portion. [Diagram 5] FIG. 5 shows the results of pressure measurement of the gas ejection device of the comparative example. [Figure 6] FIG. 6 shows the results of pressure measurement of the gas ejection device of the embodiment. [Figure 7] FIG. 7 is a graph showing the discharge time in the gas discharge devices of the comparative example and the embodiment. [Figure 8]FIG. 8 is a graph showing the Reynolds number at the time of discharge from the gas ejection device of the embodiment. [Figure 9] FIG. 9 is a schematic diagram of a gas ejection device according to a modified example. [Figure 10] FIG. 10 is a schematic diagram of a gas ejection device according to a modified example. [Figure 11] FIG. 11 is a schematic diagram of a flow resistor portion according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment in which the gas ejection device is applied to an electronic component sorting device will be described with reference to the drawings. Note that the drawings may show components enlarged for ease of understanding. The dimensional ratios of the components may differ from those in the actual drawings or from those in other drawings.

[0010] <Overall structure> As shown in FIG. 1, a sorting device 100 for electronic components P includes a gas ejection device 10, a parts feeder 101, a conveying table 102, and an inspection device 103. The parts feeder 101 supplies electronic components P onto a main surface of the conveying table 102. Examples of the electronic components P include inductors, thermistors, and ceramic capacitors. The conveying table 102 is an example of a conveying machine. The conveying table 102 is disk-shaped. The conveying table 102 is rotatable. As the conveying table 102 rotates, the conveying table 102 conveys the electronic components P.

[0011] The inspection device 103 is located above the conveying table 102. Moreover, the inspection device 103 faces the main surface of the conveying table 102. The inspection device 103 includes, for example, a camera. The inspection device 103 performs inspection on the electronic components P conveyed by the conveying table 102. In this embodiment, the inspection device 103 captures an image of the appearance of the electronic components P. Then, the inspection device 103 judges whether the electronic components P are pass or fail based on the captured image.

[0012] The gas ejection device 10 is located downstream of the inspection device 103 in the conveying direction of the conveying table 102. The gas ejection device 10 ejects gas based on the inspection result of the inspection device 103. For example, the gas ejection device 10 ejects gas to electronic components P judged as pass by the inspection device 103. In this way, the gas ejection device 10 blows the pass-judged electronic components P off the conveying table 102. The blown-off electronic components P are then stored in a non-defective product storage box (not shown). In this way, the gas ejection device 10 is applicable to a sorting device 100 for electronic components P.

[0013] <About the gas ejection device> As shown in FIG. 2, the gas ejection device 10 includes a nozzle body 20 and a switching valve 30 connected to the nozzle body 20.

[0014] The nozzle body 20 has an inlet passage 21, an ejection passage 22, and a discharge passage 23. The material of the nozzle body 20 is, for example, a synthetic resin. The inflow passage 21 is a passage through which the gas supplied from the compressor 60 flows. That is, the gas from the compressor 60 can flow through the inflow passage 21. The compressor 60 is an example of a gas supply source. The compressor 60 may be connected to the inflow passage 21 via a regulator or the like. The compressor 60 supplies gas to the inflow passage 21 at a pressure of 1 MPa or less, which is higher than atmospheric pressure. When the inflow passage 21 is viewed in cross section perpendicular to the extension direction of the inflow passage 21, the shape of the inflow passage 21 is circular.

[0015] The inflow passage 21 has an inlet IL and a first connection port C1 located on the opposite side to the inlet IL. The inlet IL and the first connection port C1 open at different positions on the outer surface of the nozzle body 20. The inlet IL is connected to the compressor 60 described above via a pipe or the like. The inlet IL and the first connection port C1 are both circular in shape. The inlet IL has a diameter of 1.6 mm. The first connection port C1 has a diameter of 1.6 mm. The diameter of the inflow passage 21 is generally 1.6 mm over its entirety.

[0016] The ejection passage 22 is defined at a location separate from the inflow passage 21 within the nozzle body 20. In other words, the ejection passage 22 is not connected to the inflow passage 21 within the nozzle body 20. However, as described below, the ejection passage 22 is connected to the inflow passage 21 via a valve passage 31 defined within the switching valve 30. The ejection passage 22 is a passage that ejects gas from the inflow passage 21 to the outside. When the ejection passage 22 is viewed in cross section perpendicular to the extension direction of the ejection passage 22, the shape of the ejection passage 22 is circular.

[0017] The ejection passage 22 has an ejection outlet SP and a second connection port C2 located on the opposite side to the ejection outlet SP. The ejection outlet SP and the second connection port C2 open at different positions on the outer surface of the nozzle body 20 from the inlet IL and the first connection port C1. The inlet IL and the first connection port C1 are both circular in shape. The second connection port C2 has a diameter of 1.6 mm. The ejection outlet SP has a diameter of 0.6 mm. The ejection passage 22 has a diameter of 1.6 mm throughout, except for the vicinity of the ejection outlet SP.

[0018] The discharge passage 23 is defined in the nozzle body 20 at a location separate from the inflow passage 21 and the ejection passage 22. In other words, the discharge passage 23 is not directly connected to the inflow passage 21 and the ejection passage 22 within the nozzle body 20. However, as described below, the discharge passage 23 is connected to the ejection passage 22 via a valve passage 31 defined within the switching valve 30. The discharge passage 23 is a passage that discharges gas within the ejection passage 22 to the outside. When the discharge passage 23 is viewed in cross section perpendicular to the extension direction of the discharge passage 23, the shape of the discharge passage 23 is circular.

[0019] The discharge passage 23 has a discharge outlet VE and a third connection port C3 located on the opposite side of the discharge outlet VE. The discharge outlet VE and the third connection port C3 open at different positions on the outer surface of the nozzle body 20. Furthermore, the discharge outlet VE and the third connection port C3 open at different positions on the outer surface of the nozzle body 20 from the inlet IL, the first connection port C1, the ejection port SP, and the second connection port C2. The shapes of the discharge outlet VE and the third connection port C3 are both circular. The diameter of the discharge outlet VE is 1.6 mm. The diameter of the third connection port C3 is 1.6 mm. Furthermore, the diameter of the discharge passage 23 is generally 1.6 mm over the entirety.

[0020] The switching valve 30 is connected to the nozzle body 20. The switching valve 30 divides a valve passage 31. The switching valve 30 can be switched between a first state in which the inflow passage 21 and the ejection passage 22 are connected, and a second state in which the ejection passage 22 and the discharge passage 23 are connected. In this manner, the switching valve 30 is a three-way valve that switches the connection destination of the ejection passage 22 to either the inflow passage 21 or the discharge passage 23. For example, a known three-port solenoid valve can be used as the switching valve 30. In addition, in FIG. 2 and FIG. 3, the portion of the valve passage 31 that is not connected to the inflow passage 21 is shown by a dashed line.

[0021] 2, when the gas ejection device 10 is in the first state, the inflow passage 21 and the ejection passage 22 are connected via the valve passage 31 in the switching valve 30. At this time, the discharge passage 23 is closed to the inflow passage 21 and the ejection passage 22 by a valve body (not shown) in the switching valve 30. That is, in the first state, the discharge passage 23 is not connected to either the inflow passage 21 or the ejection passage 22.

[0022] 3, when the gas ejection device 10 is in the second state, the ejection passage 22 and the exhaust passage 23 are connected via a valve passage 31 in the switching valve 30. At this time, the inflow passage 21 is closed to the ejection passage 22 and the exhaust passage 23 by a valve body (not shown) in the switching valve 30. That is, in the second state, the inflow passage 21 is not connected to either the ejection passage 22 or the exhaust passage 23.

[0023] <About the distribution resistor> 2 and 3, the discharge passage 23 has a flow resistance portion 50 having a smaller flow path cross-sectional area compared to other portions of the discharge passage 23. Therefore, in this embodiment, the discharge passage 23 is the specific passage ST. The flow resistance portion 50 is located midway through the discharge passage 23.

[0024] As shown in FIG. 4, the flow resistance portion 50 has a mesh shape. That is, the flow resistance portion 50 has a mesh-shaped portion. Specifically, the flow resistance portion 50 has a plurality of through holes PA penetrating in the flow direction of the gas. The flow direction of the gas coincides with the extension direction of the exhaust passage 23 at the location where the flow resistance portion 50 is arranged. The plurality of through holes PA are arranged at equal intervals in a first direction X perpendicular to the central axis of the through hole PA and in a second direction Y perpendicular to the central axis of the through hole PA and perpendicular to the first direction X. In other words, the arrangement of the plurality of through holes PA is in a matrix shape. In this embodiment, the central axis of the through hole PA coincides with the flow direction of the gas. Note that in FIG. 4, only some of the through holes PA are marked with a symbol.

[0025] In this embodiment, the flow resistance portion 50 is composed of a plurality of wires 53 extending parallel to the first direction X and a plurality of wires 52 extending in the second direction Y. The outer shapes of the wires 52 and 53 are matched to the shape of the discharge passage 23.

[0026] The wires 53 are arranged at equal intervals. The wires 52 are arranged at equal intervals. The wires 53 extending parallel to the first direction X and the wires 52 extending parallel to the second direction Y define a through hole PA having a square shape in a plan view. Note that in FIG. 4, only some of the wires 52 and 53 are labeled with reference numerals.

[0027] The material of the wire 52 and the wire 53 is stainless steel. The wire diameter of the wire 52 and the wire 53 is 50 μm. The mesh size of the flow resistance portion 50 is 80 μm. The opening rate of the flow resistance portion 50 is 75% or less. That is, the flow path cross-sectional area of ​​the flow resistance portion 50 is 75% or less of the average flow path cross-sectional area of ​​the specific passage ST excluding the flow resistance portion 50. In this embodiment, the opening rate of the flow resistance portion 50 is 75%.

[0028] <Operations of Comparative Example and This Embodiment> A pressure measurement test was conducted on a gas ejection device of a comparative example that does not have a flow resistance portion 50 as compared to the gas ejection device 10 of the above embodiment. In this pressure measurement test, at time T0, the gas ejection device of the comparative example was set to the first state, and gas was supplied from the compressor 60. Then, at time T1, the supply of gas from the compressor 60 was stopped, and the switching valve was switched to set the gas ejection device to the second state. After that, at time T5, the switching valve was switched again to set the gas ejection device to the first state. Then, the pressure in the valve passage after time T0 was continuously measured.

[0029] 5, between time T0 and time T1, the pressure in the valve passage is high because gas is supplied from the compressor 60. Then, at time T1, when the gas ejection device of the comparative example is switched to the second state, the pressure in the valve passage drops rapidly.

[0030] After a certain amount of time has passed, at time T2, the pressure in the valve passage in the gas ejection device of the comparative example becomes atmospheric pressure. After time T2, the force of gas being discharged from the exhaust passage causes the pressure in the valve passage to further drop and become negative pressure. Then, gas flows into the exhaust passage from the outside, causing the pressure in the valve passage to rise and become atmospheric pressure again at time T3. Furthermore, the force of gas flowing into the exhaust passage from the outside causes the pressure in the valve passage to rise above atmospheric pressure. After that, the pressure in the valve passage drops again and returns to atmospheric pressure at time T4.

[0031] In this way, the pressure in the valve passage gradually converges to atmospheric pressure as a whole after time T1 by repeating a cycle of being negative, positive, and negative. Then, when the gas ejector is switched to the first state at time T5 to supply gas, the pressure in the valve passage rises rapidly.

[0032] In the gas ejection device of the comparative example, the pressure in the valve passage becomes negative between time T2 and time T3, and gas flows in from the exhaust port between time T2 and time T3. The gas that flows in may be discharged from the ejection port during the period from time T3 to time T4 when the pressure in the valve passage 31 becomes positive. In other words, gas may be ejected from the ejection port at a timing other than before time T2 or after time T5, when gas is ejected from the ejection port.

[0033] A pressure measurement test similar to the pressure measurement test for the gas discharge device of the comparative example not having the flow resistance portion 50 described above was performed for the gas discharge device 10 of the above embodiment. 6, between time T0 and time T1, the pressure in the valve passage 31 of the gas ejection device 10 is high because gas is supplied from the compressor 60. Then, at time T1, when the gas ejection device 10 is switched to the second state, the pressure in the valve passage 31 drops rapidly.

[0034] However, after time T1, the gas passes through the flow resistance portion 50 and is discharged from the exhaust port VE. Therefore, the flow of the gas is rectified in the exhaust passage 23, and the rate at which the gas is discharged from the exhaust passage 23 becomes gentle.

[0035] After that, at time T6 after a certain time has elapsed, the pressure in the valve passage 31 in the gas ejection device 10 of the embodiment becomes atmospheric pressure. Note that the period from time T1 to time T6 in this pressure measurement test was slightly longer than the period from time T1 to time T2 in the pressure measurement for the gas ejection device of the comparative example.

[0036] After time T6, the pressure in the valve passage 31 further decreases and becomes negative due to the force of gas being discharged from the discharge passage 23. Then, gas flows into the discharge passage 23 from the outside, so the pressure in the valve passage 31 increases and becomes atmospheric pressure again at time T7. However, in the gas discharge device 10 of the embodiment, the range of up and down fluctuation of the pressure after time T6, i.e., the amplitude, is smaller than the amplitude after time T2 in the gas discharge device of the comparative example.

[0037] After time T7, the pressure in the valve passage 31 is maintained at approximately atmospheric pressure. In this way, also in the gas ejection device 10 of the embodiment, the pressure in the valve passage 31 fluctuates up and down and converges to atmospheric pressure after time T6. However, in the gas ejection device 10 of the embodiment, the range of up and down fluctuation of the pressure after time T6, i.e., the amplitude, is smaller than the amplitude after time T2 in the gas ejection device of the comparative example.

[0038] From the above pressure measurement results, in the gas ejection device 10 of the embodiment, the pressure inside the gas ejection device 10 becomes slightly negative between time T6 and time T7. However, the degree of the negative pressure is smaller than that of the gas ejection device of the comparative example. In this way, in the gas ejection device 10 of the embodiment, the pressure in the valve passage 31 is unlikely to become negative between time T1 and time T5, so the pressure in the valve passage 31 does not become significantly positive between time T1 and time T5. Therefore, in the gas ejection device 10 of the embodiment, it is unlikely that the pressure in the valve passage 31 becomes positive between time T6 and time T5, causing gas to be ejected from the ejection port SP.

[0039] <Discharge time of the gas ejection device of the comparative example and the gas ejection device of this embodiment> 7, in the gas jetting device of the comparative example and the gas jetting device 10 of the present embodiment, the time taken for the gas that has flowed into the inside to be discharged and reach atmospheric pressure was measured while measuring the pressure of the gas supplied to the gas jetting device 10. The gas jetting device of the comparative example is the same as the gas jetting device described above.

[0040] In the measurements, when each gas ejection device was in the first state, gas was allowed to flow in with a differential pressure of 75 kPa relative to atmospheric pressure. In the measurements, the switching valve was switched from the first state to the second state at 0 msec. Then, in each gas ejection device, the time until the internal differential pressure reached 0 kPa, i.e., the time until the gas was discharged, was measured. In the measurements, the pressure inside the valve passage was measured as the pressure inside the gas ejection device.

[0041] First, the case of the gas ejection device of the comparative example will be described. In the gas ejection device of the comparative example, the internal pressure dropped to 60 kPa after about 0.18 msec. In the gas ejection device of the comparative example, the internal pressure dropped to 50 kPa after about 0.22 msec. In the gas ejection device of the comparative example, the internal pressure dropped to 40 kPa after about 0.31 msec. In the gas ejection device of the comparative example, the internal pressure dropped to 30 kPa after about 0.41 msec. In the gas ejection device of the comparative example, the internal pressure dropped to 20 kPa after about 0.51 msec. In the gas ejection device of the comparative example, the internal pressure dropped to 10 kPa after about 0.68 msec. In the gas ejection device of the comparative example, the internal pressure dropped to 0 kPa after about 0.98 msec. That is, in the gas ejection device of the comparative example, the time required for the introduced gas to be discharged was approximately 0.98 msec.

[0042] Next, the case of the gas ejection device 10 of this embodiment will be described. In the gas ejection device 10 of this embodiment, the internal pressure dropped to 60 kPa after about 0.18 msec. In the gas ejection device 10 of this embodiment, the internal pressure dropped to 50 kPa after about 0.23 msec. In the gas ejection device 10 of this embodiment, the internal pressure dropped to 40 kPa after about 0.32 msec. In the gas ejection device 10 of this embodiment, the internal pressure dropped to 30 kPa after about 0.42 msec. In the gas ejection device 10 of this embodiment, the internal pressure dropped to 20 kPa after about 0.52 msec. In the gas ejection device 10 of this embodiment, the internal pressure dropped to 10 kPa after about 0.71 msec. In the gas-discharging device 10 of this embodiment, the internal pressure dropped to 0 kPa after about 1.18 msec had elapsed. That is, in the gas-discharging device 10 of this embodiment, it took about 1.18 msec for the introduced gas to be discharged.

[0043] In the above measurement results, the difference in discharge time between the gas jetting device of the comparative example and the gas jetting device 10 of this embodiment was about 0.2 msec. In particular, the time until the internal pressure dropped to 10 kPa was almost the same for the gas jetting device of the comparative example and the gas jetting device 10 of this embodiment. On the other hand, the time until the internal pressure dropped from 10 kPa to 0 kPa differed by about 1.5 times between the gas jetting device of the comparative example and the gas jetting device 10 of this embodiment.

[0044] As shown in FIG. 8, in the above measurement, the Reynolds number for the gas flow was calculated from the time when the pressure in the gas ejection device 10 of this embodiment became 70 kPa until it became 0 kPa. As a result, when the pressure in the gas ejection device 10 was 70 kPa, the Reynolds number was about 5800. When the pressure in the gas ejection device 10 was 60 kPa, the Reynolds number was about 5400. When the pressure in the gas ejection device 10 was 50 kPa, the Reynolds number was about 5100. When the pressure in the gas ejection device 10 was 40 kPa, the Reynolds number was about 4700. When the pressure in the gas ejection device 10 was 30 kPa, the Reynolds number was about 4200. When the pressure in the gas ejection device 10 was 20 kPa, the Reynolds number was about 3550. When the pressure inside the gas ejection device 10 was 10 kPa, the Reynolds number was about 2600.

[0045] From the above calculation results of the Reynolds number, when the pressure inside the gas ejection device 10 is 30 kPa or more, the gas flow is likely to be a turbulent flow. When the pressure inside the gas ejection device 10 is 10 kPa or more and less than 30 kPa, the gas flow is likely to be a transition flow. When the pressure inside the gas ejection device 10 is less than 10 kPa, the gas flow is likely to be a laminar flow. In other words, when the pressure inside the gas ejection device 10 is less than 10 kPa, the gas is more susceptible to the viscous resistance from the flow resistance portion 50, and it can be estimated that the drag force from the flow resistance portion 50 increases.

[0046] That is, in this embodiment, when the pressure inside the gas jetting device 10 is 30 kPa or more, the gas is discharged from the outlet VE in a state where it receives relatively little resistance from the flow resistance portion 50. That is, the gas is discharged smoothly until the pressure inside the gas jetting device 10 reaches a relatively small pressure of 30 kPa. Therefore, in this embodiment, the time it takes for the gas to be discharged does not vary greatly compared to the gas jetting device of the comparative example that does not have the flow resistance portion 50.

[0047] <Effects of this embodiment> (1) According to the above embodiment, even if the switching valve 30 is switched to the second state when the pressure inside the ejection passage 22 is high, the resistance of the flow resistance portion 50 prevents gas from being forcefully ejected from the exhaust port VE. This prevents the pressure inside the ejection passage 22 from becoming negative relative to the outside air. Therefore, according to the above configuration, it is also possible to prevent gas from flowing in from the exhaust port VE in an attempt to eliminate the negative pressure, and then the gas from being ejected from the ejection port SP.

[0048] (2) According to the above configuration, the specific passage ST is the exhaust passage 23. Therefore, the gas that flows in in the first state reaches the outlet SP without passing through the flow resistance portion 50. That is, according to the above configuration, the flow resistance portion 50 does not obstruct the flow of the flow of the gas.

[0049] (3) In the above embodiment, the flow resistance portion 50 has a mesh-shaped portion having a plurality of through holes PA penetrating in the gas flow direction. This configuration makes it difficult to disturb the flow of gas flowing through the exhaust passage 23. Therefore, even though the flow path cross-sectional area of ​​the flow resistance portion 50 is reduced, the flow of gas flowing through the exhaust passage 23 is not excessively hindered.

[0050] (4) In the above embodiment, the through holes PA of the flow resistance portion 50 are disposed at equal intervals in the first direction X and the second direction Y. With this configuration, the assembly of the flow resistance portion 50 does not require precision in its orientation with respect to the discharge passage 23. In other words, with the above configuration, the installation of the flow resistance portion 50 is easy.

[0051] (5) In the above embodiment, the flow path cross-sectional area of ​​the flow resistance portion 50 is 75% or less of the average flow path cross-sectional area of ​​the exhaust passage 23 excluding the flow resistance portion 50. According to this configuration, the resistance by the flow resistance portion 50 becomes large, and the forceful discharge of gas from the exhaust passage 23 can be more significantly suppressed.

[0052] (6) In the above embodiment, the difference in time until gas is discharged is about 0.2 msec compared to the comparative example of the gas discharge device. That is, according to the configuration of the above embodiment, it is possible to suppress the gas from being forcefully discharged from the discharge port VE, while suppressing an increase in the discharge time.

[0053] (7) In the above embodiment, the gas jetting device 10 is prevented from jetting gas at unintended timing, which eliminates the need to transport the electronic components P by carefully adjusting the gas jetting timing. That is, according to the above configuration, it is easy to adjust the timing at which the electronic components P are transported within the jetting range of the gas jetting device 10. In addition, the gas jetting device 10 is prevented from jetting gas at unintended timing, which enables the sorting device 100 to improve the transport speed of the electronic components P compared to a sorting device that uses a gas jetting device that is greatly affected by the gas.

[0054] <Example of change> The above embodiment and the following modified examples can be implemented in combination with each other to the extent that no technical contradiction occurs.

[0055] <Examples of changes to the overall configuration> The material of the nozzle body 20 is not limited to the examples in the above embodiment. For example, the material of the nozzle body 20 may be a metal.

[0056] In the above embodiment, the diameters of the outlet VE, the outlet SP, the inlet IL, the first connection port C1, the second connection port C2, and the third connection port C3 are not limited to those in the above embodiment. In the above embodiment, the diameters of the discharge passage 23, the inflow passage 21, and the jet passage 22 are not limited to those in the above embodiment. Also, the diameters of the discharge passage 23, the inflow passage 21, and the jet passage 22 may be different from each other.

[0057] In the above embodiment, the switching valve 30 is not limited to a three-port solenoid valve. For example, it may be a solenoid valve having four or more ports. In addition, the switching valve 30 is not limited to a solenoid valve.

[0058] <Example of changes to flow resistors> In the above embodiment, the flow path cross-sectional area of ​​the flow resistance portion 50 may be larger than 75% of the average flow path cross-sectional area of ​​the specific passage ST in the portion excluding the flow resistance portion 50. However, the flow resistance portion 50 does not include a state in which the flow path cross-sectional area is small due to manufacturing errors, burrs, etc. in the specific passage ST. From the viewpoint of suppressing an increase in the time it takes to discharge gas from the exhaust port VE, it is preferable that the flow path cross-sectional area of ​​the flow resistance portion 50 is 20% or more of the average flow path cross-sectional area of ​​the specific passage ST in the portion excluding the flow resistance portion 50.

[0059] In the above embodiment, the through holes PA of the flow resistance portion 50 do not have to be arranged at equal intervals in the first direction X. Moreover, the through holes PA of the flow resistance portion 50 do not have to be arranged at equal intervals in the second direction Y. For example, the flow resistance portion 50 may be a porous body having continuous pores.

[0060] In the above embodiment, the material of each wire in the flow resistance portion 50 is not limited to stainless steel. For example, the material of each wire may be nylon or the like. The wire diameter of each wire is not limited to the example of the above embodiment. The mesh size of the flow resistance portion 50 is also not limited to the example of the above embodiment.

[0061] In the above embodiment, the flow resistance portion 50 may have a ring-shaped wire that matches the inner diameter of the discharge passage 23. In that case, the wire 52 and the wire 53 may be fixed to the ring-shaped wire.

[0062] In the above embodiment, the flow resistance portion 50 is not limited to a mesh shape. For example, the flow resistance portion 50 may be a protruding portion protruding from the inner wall surface of the specific passage ST. That is, the flow resistance portion 50 may have a protruding portion. For example, in the example shown in FIG. 9, the discharge passage 23 has a throttling portion as the flow resistance portion 50 in the middle of the discharge passage 23. This throttling portion protrudes toward the central axis of the discharge passage 23 with respect to the inner wall surface of the discharge passage 23 at a portion that is not the throttling portion. In addition, the throttling portion extends around the entire circumference of the inner circumferential surface of the discharge passage 23.

[0063] 10, the flow resistance portion 50 may be located at the third connection port C3 of the discharge passage 23. Note that even when the flow resistance portion 50 is attached to the opening of the valve passage 31 that connects to the third connection port C3, the flow resistance portion 50 covers the third connection port C3. Therefore, even when the flow resistance portion 50 is attached to the opening of the valve passage 31 that connects to the third connection port C3, the flow resistance portion 50 can be considered to be located at the third connection port C3 of the discharge passage 23. Also, the flow resistance portion 50 may be located at the discharge port VE.

[0064] In the above embodiment, the flow resistance portion 50 may be larger than the diameter of the discharge passage 23. In that case, for example, the flow resistance portion 50 may be attached to the discharge port VE or the third connection port C3 from the outer surface of the nozzle body 20. With this configuration, the assembly of the flow resistance portion 50 does not require precision in positioning with respect to the specific passage ST. In other words, with the above configuration, the installation of the flow resistance portion 50 is easy.

[0065] 11, the flow resistance portion 50 may be in the form of a sheet attached to the opening of the specific passage ST. That is, the flow resistance portion 50 may have a sheet-like portion. The material of the sheet-like flow resistance portion 50 may be, for example, metal, synthetic resin, paper, or the like. For example, in the case of the sheet-like flow resistance portion 50, the flow resistance portion 50 can be installed by simply attaching it to the outer surface of the nozzle body 20 so as to block the opening.

[0066] The flow resistance portion 50 may have a smaller cross-sectional area than other portions of the specific passage ST. For example, the flow resistance portion 50 may also function as a silencer or the like.

[0067] In the above embodiment, the specific passage ST may be either the ejection passage 22 or the discharge passage 23. That is, in the above embodiment, the specific passage ST may be the ejection passage 22.

[0068] In the above embodiment, the specific passage ST may have a plurality of flow resistance portions 50. For example, when the specific passage ST has two flow resistance portions 50, one of the flow resistance portions 50 may be located in the discharge passage 23, and the other flow resistance portion 50 may be located in the ejection passage 22. Also, for example, when one specific passage ST has two flow resistance portions 50, the two flow resistance portions 50 do not have to have the same configuration.

[0069] In the above embodiment, a one-way valve may be used to reduce the risk of gas being ejected from the gas ejection device at a timing when it should not be ejected. For example, a one-way valve that allows gas to flow from the third connection port C3 side to the exhaust port VE side and does not allow gas to flow from the exhaust port VE side to the third connection port C3 side may be disposed in the exhaust passage 23. Also, for example, a one-way valve that allows gas to flow from the second connection port C2 side to the ejection port SP side and does not allow gas to flow from the ejection port SP side to the second connection port C2 side may be disposed in the ejection passage 22. When these one-way valves are employed, the risk of gas being ejected from the gas ejection device at a timing when it should not be ejected can be reduced without requiring a flow resistance portion 50.

[0070] <Example of changes to sorting equipment> In the above embodiment, the conveyor in the sorting device 100 for electronic components P is not limited to the disk-shaped conveyor table 102. For example, the conveyor may be a belt conveyor, a roller conveyor, or the like.

[0071] In the above embodiment, the position of the inspection device 103 is not limited to the example of the above embodiment. For example, the inspection device 103 may be located radially outward from the conveying table 102, near the center of the conveying table 102, or below the conveying table 102. Also, a plurality of inspection devices 103 may be provided, and for example, a plurality of devices may be provided that are arranged at the above-mentioned positions.

[0072] In the above embodiment, the inspection device 103 is not limited to a camera, and may be one that uses X-rays or the like for inspection. In the above embodiment, in the sorting device 100 for electronic components P, the gas ejection device 10 may eject gas to electronic components P that have been determined to be defective by the inspection device 103. That is, the gas ejection device 10 may be one that ejects gas based on the inspection results of the inspection device 103. The inspection results are not limited to the pass / fail judgment results for the electronic components P. For example, the inspection results may be the results of a judgment as to whether the inspection device 103 has performed an inspection.

[0073] <Additional Notes> The technical ideas that can be derived from the above-described embodiments and modifications will be described below. [1] A gas ejection device comprising: an inlet passage through which gas supplied from a gas supply source flows, an outlet passage through which the gas flowing from the inlet passage is ejected to the outside, and an exhaust passage through which the gas in the exhaust passage is ejected to the outside; and a switching valve capable of switching between a first state in which the inlet passage and the exhaust passage are connected and a second state in which the exhaust passage and the exhaust passage are connected, wherein when either the exhaust passage or the exhaust passage is designated as a specific passage, the specific passage has a flow resistance portion whose flow path cross-sectional area is smaller than other portions in the specific passage.

[0074] [2] The gas ejection device according to [1], wherein the specific passage is the exhaust passage. [3] The gas ejection device according to [1] or [2], wherein the exhaust passage has an exhaust port that opens on the outer surface of the nozzle body, and the flow resistance portion is located at the exhaust port.

[0075] [4] The gas ejection device described in [1] or [2], wherein the exhaust passage has an exhaust port opening on the outer surface of the nozzle body and a connection port located on the opposite side of the exhaust port in the exhaust passage, and the flow resistance portion is located at the connection port.

[0076] [5] The gas ejection device according to any one of [1] to [4], wherein the flow resistance portion has a mesh-shaped portion having a plurality of through holes penetrating in the flow direction of the gas. [6] The gas ejection device described in [5], wherein the multiple through holes are arranged at equal intervals in a first direction perpendicular to the central axis of the through holes and in a second direction perpendicular to the central axis and perpendicular to the first direction.

[0077] [7] The gas ejection device according to any one of [1] to [4], wherein the flow resistance portion has a sheet-like portion attached to the specific passage. [8] The gas ejection device according to any one of [1] to [4], wherein the flow resistance portion has a protrusion protruding from an inner wall surface of the specific passage.

[0078] [9] A gas ejection device according to any one of [1] to [8], wherein the flow resistance portion has a flow path cross-sectional area that is 75% or less of the average flow path cross-sectional area of ​​the specific passage excluding the flow resistance portion.

[0079]

[10] A sorting device for electronic components comprising: a conveyor for conveying electronic components; an inspection device for inspecting the electronic components conveyed by the conveyor; and a gas ejection device located downstream of the inspection device in a conveying direction of the conveyor and ejecting gas based on inspection results of the inspection device, wherein the gas ejection device comprises a nozzle body having an inflow passage through which the gas supplied from a gas supply source flows, an ejection passage for ejecting the gas flowing from the inflow passage to the outside, and an exhaust passage for exhausting the gas in the ejection passage to the outside, and a switching valve capable of switching between a first state in which the inflow passage and the ejection passage are connected and a second state in which the ejection passage and the exhaust passage are connected, wherein when either the ejection passage or the exhaust passage is designated as a specific passage, the specific passage has a flow resistance portion having a flow path cross-sectional area smaller than other portions in the specific passage. [Explanation of symbols]

[0080] 10...Gas ejection device 20…Nozzle body 21...Inflow passage 22…Gushing passage 23...Discharge passage 30...Switch valve 50…Flow resistance section

Claims

1. a nozzle body having an inflow passage through which the gas supplied from a gas supply source flows, an ejection passage through which the gas flowing from the inflow passage is ejected to the outside, and an ejection passage through which the gas in the ejection passage is ejected to the outside; a switching valve capable of switching between a first state in which the inlet passage and the outlet passage are connected and a second state in which the outlet passage and the outlet passage are connected; It is equipped with When either the ejection passage or the exhaust passage is designated as a specific passage, The specific passage has a flow resistance portion having a flow passage cross-sectional area smaller than that of other portions of the specific passage. Gas ejection device.

2. The specific passage is the exhaust passage. The gas ejection device according to claim 1 .

3. The discharge passage has a discharge port that opens on an outer surface of the nozzle body, The flow resistance portion is located at the outlet. The gas ejection device according to claim 1 .

4. the discharge passage has a discharge port that opens on an outer surface of the nozzle body and a connection port that is located on the opposite side of the discharge port in the discharge passage, The flow resistance portion is located at the connection port. The gas ejection device according to claim 1 .

5. The flow resistance portion has a mesh-shaped portion having a plurality of through holes penetrating in the flow direction of the gas. The gas ejection device according to claim 1 .

6. The through holes are disposed at equal intervals in a first direction perpendicular to a central axis of the through hole and in a second direction perpendicular to the central axis and perpendicular to the first direction. The gas ejection device according to claim 5.

7. The flow resistance portion has a sheet-like portion attached to the specific passage. The gas ejection device according to claim 1 .

8. The flow resistance portion has a protrusion protruding from an inner wall surface of the specific passage. The gas ejection device according to claim 1 .

9. The flow passage cross-sectional area of ​​the flow resistance portion is 75% or less of the average flow passage cross-sectional area of ​​the specific passage excluding the flow resistance portion. The gas ejection device according to claim 1 .

10. A conveyor for conveying electronic components; an inspection device that inspects the electronic components transported by the transport machine; a gas ejection device that is located downstream of the inspection device in a conveying direction of the conveyor and ejects gas based on an inspection result of the inspection device; Equipped with The gas ejection device is a nozzle body having an inlet passage through which the gas supplied from the gas supply source flows, an outlet passage through which the gas flowing from the inlet passage is ejected to the outside, and an outlet passage through which the gas in the outlet passage is ejected to the outside; a switching valve capable of switching between a first state in which the inlet passage and the outlet passage are connected and a second state in which the outlet passage and the outlet passage are connected; It is equipped with When either the ejection passage or the exhaust passage is designated as a specific passage, The specific passage has a flow resistance portion having a flow passage cross-sectional area smaller than that of other portions of the specific passage. Electronic component sorting device.

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