WO2004091275A1

WO2004091275A1 - Parts holdability testing method and testing device

Info

Publication number: WO2004091275A1
Application number: PCT/JP2004/004570
Authority: WO
Inventors: Yukio Ueno; Takehiro Ido; Youji Fujita
Original assignee: Fuji Machine Mfg. Co., Ltd.
Priority date: 2003-04-04
Filing date: 2004-03-30
Publication date: 2004-10-21
Also published as: JP4474592B2; JPWO2004091275A1

Abstract

A parts holdability testing device for testing a parts holding device for its holdability, the device being capable of accurately examining whether the parts holdability is good or bad. By a negative pressure sensor communicating with the suction hole in an adsorption nozzle for measuring negative pressure are detected negative pressures at a plurality of time points (preferably three or more time points) different from a time point at which evacuation of the adsorption nozzle is started (S4). The detected negative pressure values are respectively compared with reference negative pressure values set at respective detection time points (S6), and these comparison results are synthetically judged to automatically make an adsorption nozzle parts holdability quality decision (S7) and make a causal factor estimate if the decision shows that the holdability is bad (S8-S12).

Description

Description Part retention performance inspection method and inspection equipment Technical field

The present invention relates to a component holding device provided in an electronic circuit component mounting machine or the like and holding an electronic circuit component by a suction nozzle, and particularly to a method and an apparatus for inspecting the holding performance of the component holding device. is there. Background art

2. Description of the Related Art Electronic circuit component holding devices that suction and hold electronic circuit components by suction nozzles based on a negative pressure supplied from a negative pressure supply device are widely used in electronic circuit component mounting machines and the like. Electronic circuit component mounting machines generally include a component supply device that supplies electronic circuit components, a board holding device that holds a circuit board such as a printed wiring board, and a component supply device. And a mounting device for mounting on the held circuit board. The mounting device is often provided with an electronic circuit component holding device that sucks and holds an electronic circuit component by a suction nozzle.

An electronic circuit component holding device equipped with a suction nozzle is an excellent device that can easily and quickly hold and release an electronic circuit component. However, a nozzle defect such as bending of the suction nozzle, chipping and abrasion, etc. Possibility of insufficient suction holding power of electronic circuit parts by suction nozzle due to various reasons such as clogging of suction hole in suction nozzle, filter in negative pressure supply passage, failure of negative pressure supply device, etc. There is. If the suction holding power is insufficient, the suction nozzle will fail to hold the electronic circuit components supplied by the component supply device. May occur. Therefore, the present applicant has developed a method and a device for detecting a component holding device provided with a suction nozzle, and has applied for a patent. That is described in Japanese Patent Application Laid-Open No. 10-126997.

This test method uses a negative pressure tester. A detector main body, and (b) a detection hole rotatably mounted on the inspection device main body, wherein a plurality of detection holes having different inner diameters are provided on a contact surface capable of contacting a suction surface of the suction nozzle. (C) a detection passage provided in the inspection device main body so as to be selectively communicated with each of the plurality of detection holes in accordance with the rotation of the detection hole forming member; A negative pressure sensor for detecting a negative pressure in the detection passage. The electronic circuit component holding device is capable of mounting a plurality of types of suction nozzles with different inside diameters of suction holes, and the detection hole forming member is manually rotated according to the suction nozzle whose component holding performance is to be inspected. And a detection hole is selected. The suction surface of the suction nozzle is brought into contact with the contact surface on which the selected detection hole is open, and a negative pressure is supplied to the suction nozzle from the negative pressure supply device. Is detected by the negative pressure sensor. Then, the quality of the component holding performance of the electronic component holding device is determined based on the detected negative pressure. Disclosure of the invention

In view of the above circumstances, the present invention has been made with a view to further improving the inspection method and the inspection device for the electronic circuit component holding device, and the present invention has the following aspects. A component holding performance inspection method and a component holding performance inspection device can be obtained. As in the claims, each aspect is divided into sections, each section is numbered, and if necessary, the other section numbers are cited. This is for the purpose of facilitating the understanding of the present invention, and should not be construed as limiting the technical features and combinations thereof described in this specification to those described in the following sections. . In addition, when two or more items are described in one section, the items need not always be adopted together. It is possible to select and adopt only some of the items. ,

(1) A method for inspecting the component holding performance of an electronic circuit component holding device that sucks and holds an electronic circuit component by a suction nozzle based on a negative pressure supplied from a negative pressure supply device,

A detection hole that is opened on a contact surface that can contact the suction surface of the suction nozzle and that can communicate with the suction hole of the suction nozzle when the suction nozzle is in contact with the contact surface; A preparation step of preparing a negative pressure tester provided with a negative pressure sensor for detecting a negative pressure of the detection hole;

The suction surface of the suction nozzle is brought into contact with the contact surface of the negative pressure detector, and the negative pressure is supplied to the negative pressure supply device. The negative pressure increases the negative pressure of the detection hole. A negative pressure detecting step of causing the negative pressure sensor to detect a negative pressure of the detection hole at a plurality of points in the process;

A judging step of judging the quality of component holding performance of the electronic circuit component holding device based on the negative pressure values at the plurality of times detected in the negative pressure detecting step;

A component holding performance inspection method characterized by including:

At multiple points in the process of increasing the negative pressure of the detection hole due to the negative pressure supply by the negative pressure supply device, based on the negative pressure value of the detection hole detected by the negative pressure sensor based on the negative pressure value at only one point in time The quality of the component holding performance of the component holding device can be determined more accurately than that of the component holding device. A defect that cannot be detected based on the negative pressure value at only one point in time can be detected based on the negative pressure value at multiple points in time. For example, if the final attained negative pressure value (or steady-state negative pressure value), which is the negative pressure in the final stage (or steady state) at which the negative pressure in the detection hole does not change, is insufficient, the component holding performance is poor. Although this is clear, just because there is no shortage in the final attained negative pressure value does not necessarily mean that the component holding performance is good. For example, if foreign matter is clogged in the suction hole of the suction nozzle, the negative pressure value on the way to reaching the final negative pressure may be insufficient even if the final attained negative pressure is not insufficient. In this case, the suction nozzle starts retreating while the suction force of the electronic circuit component by the suction nozzle is still insufficient, and the suction error occurs when the electronic circuit component is not held by the suction nozzle, or is held in an abnormal posture. Abnormal adsorption may occur. Therefore, in this case, the component holding performance should be judged to be insufficient, but it is judged based on the detected negative pressure value only at one point in time (in this example, the detected negative pressure near the steady state). If so, it is impossible.

Note that the plurality of negative pressure detection points may be any of a plurality of points in time at which the tendency of the negative pressure increase in the suction hole can be grasped. , Where the elapsed time from the point of contact of the suction surface to the contact surface It is convenient to have several points in time. When the negative pressure supply by the negative pressure supply device is started after the suction nozzle is brought into contact with the negative pressure detector, the negative pressure supply from the negative pressure supply device to the suction nozzle is started when the elapsed time is counted. It is desirable to set the starting point, and if the suction nozzle is brought into contact with the negative pressure detector after the negative pressure supply by the negative pressure supply device has started, the contact point of the suction nozzle with the negative pressure detector Is desirably the time when the timing starts. In many cases, it takes a certain time between the start of the suction nozzle approaching the negative pressure tester and the start of the negative pressure supply by the negative pressure supply device. There is a relationship, in which case any of them can be the start of timing. The time at which the suction nozzle starts approaching the negative pressure tester can be used as the timing start time.

(2) The component holding performance inspection method according to (1), wherein the plurality of time points is three or more time points. The plurality of time points may be two time points, but if it is three or more time points, it is possible to more accurately determine the quality of the holding component performance of the electronic circuit component holding device, and the change in the negative pressure of the detection hole in a curved line. As a result, it is possible to obtain an effect of improving the accuracy of estimating the cause when the performance of the holding component is defective. It is also possible to acquire a curve representing the change in the negative pressure of the detection hole (curve representing the relationship between the elapsed time and the detected negative pressure value) and determine the quality of the component holding performance based on the shape of the curve. . In that case, the negative pressure change curve is considered to represent the negative pressure value at an infinite number of times.

(3) The determining step includes a comparing step of comparing the negative pressure values of the detection holes at the plurality of time points detected in the detecting step with the preset standard negative pressure values at the plurality of time points. The component holding performance detecting step according to (1) or (2), which is a step of judging the quality of the component holding ability based on the comparison result in the comparing step.

By comparing the detected negative pressure value at a plurality of time points with the standard negative pressure value, it is possible to easily and accurately determine the quality of the component holding performance. In particular, if comparisons are made at three or more points in time, the reliability of the determination of the quality of the component holding performance becomes high, and the cause of the failure when a failure occurs can be easily estimated.

(4) A first cause estimating step of estimating the cause of the deterioration of the component holding performance based on a difference in the detected negative pressure values at the plurality of times from the corresponding standard negative pressure values is included (3). 3. The method for inspecting component holding performance described in 2. (5) A plurality of suction nozzles are inspected using a common negative pressure tester, and in the determination step, part holding performance of some of the plurality of suction nozzles is poor and other suction nozzles are defective. If it is determined that the component holding performance is good for the suction nozzles that are determined to have poor component holding performance, it is estimated that the suction nozzles themselves are defective. If it is determined that is defective, a second cause estimating step of estimating that at least one of the negative pressure supply device and the negative pressure sensor is defective is included in any one of (1) to (4).部品 Part holding performance inspection method.

If it is determined that one of the plurality of suction nozzles has poor component holding performance and the other suction nozzles are good, the one suction nozzle is defective and component holding is performed for all suction nozzles. If the performance is determined to be poor, the mode in which at least one of the negative pressure supply device and the negative pressure sensor is presumed to be defective is typical of the mode in this section, but is not limited thereto. Absent. According to the features of this section, the failure of the negative pressure supply device and the negative pressure sensor can be distinguished from the failure of the suction nozzle, and the reliability of the component holding performance inspection can be increased.

(6) A part of the plurality of suction nozzles is a number of suction nozzles equal to or less than a product of the number of the plurality of suction nozzles and the first set ratio, and is larger than the number of the part nozzles. The component holding performance inspection method according to (5), wherein the number is equal to or greater than a product of a second set ratio larger than the first set ratio and the number of the plurality of suction nozzles.

The features of this section are particularly effective when the number of suction nozzles to be inspected is large. (7) Based on the negative pressure supplied from the negative pressure supply device, the component holding performance of the electronic circuit component holding device, which sucks and holds the electronic circuit components by means of a plurality of types of suction nozzles having suction holes having different inner diameters, is used. A method of testing,

A plurality of contact surfaces capable of contacting the suction surfaces of the plurality of types of suction nozzles can communicate with the suction holes of the suction nozzles in a state where the plurality of types of suction nozzles are in contact with the contact surfaces. Prepare a negative pressure tester including a plurality of detection holes that are opened in a state and at least one negative pressure sensor that detects a negative pressure in the detection holes.

Each of the suction surfaces of the plurality of types of suction nozzles and the plurality of the suction pressure nozzles The negative pressure is supplied to the negative pressure supply device while making contact with each of the contact surfaces, and the negative pressure supply increases the negative pressure of each of the plurality of detection holes. A negative pressure detecting step of causing a pressure sensor to detect a negative pressure of each of the plurality of detection holes;

A judging step of judging the quality of the holding component performance of the electronic circuit component holding device including the plurality of types of suction nozzles based on the negative pressure values at least at a plurality of times detected in the negative pressure detecting step. When

A component holding performance inspection method characterized by including:

If the inside diameter of the suction hole of the suction nozzle is small, the inside diameter of the detection hole of the negative pressure tester must also be reduced, or it is desirable to make it smaller. In that case, even if the same negative pressure supply device and negative pressure sensor are used, the state of change of the negative pressure in the detection hole is different. Therefore, it is desirable to judge the quality of component holding performance in consideration of this fact. The method described in the next section is an example. Note that the plurality of contact surfaces may be continuous with each other (for example, each part of one plane) or may not be continuous with each other.

(8) In the determining step, each of the standard negative pressure values at the plurality of times preset for each of the plurality of types of suction nozzles, and the negative pressure values at the plurality of times detected in the negative pressure detecting step. (7) The method for checking component holding performance according to item (7), which includes a comparing step of comparing the components, and determining whether the component holding performance is good or not based on the comparison result in the comparing process.

For multiple types of suction nozzles with different inside diameters of suction holes, set standard negative pressure values at multiple points in time, and compare them with the detected negative pressure value to increase the reliability of component holding performance judgment. be able to.

(9) One negative pressure sensor common to the plurality of detection holes is used as the at least one negative pressure sensor, and the one negative pressure sensor and one of the plurality of detection holes are selectively used. The suction surface of the plurality of types of suction nozzles is brought into contact with the contact surface where the detection hole communicating with the negative pressure sensor is opened. Retention performance inspection method.

According to the features of this section, for a plurality of types of suction nozzles having different inner diameters of the suction holes, The quality check of the component holding performance can be easily performed. Also, the manufacturing cost of the negative pressure tester can be reduced.

(10) A device for inspecting the component holding performance of an electronic circuit component holding device that sucks and holds an electronic circuit component by a suction nozzle based on a negative pressure supplied from a negative pressure supply device, and (a) the suction nozzle (B) a detection hole which is opened in a state in which the suction surface is in contact with the suction surface of the suction nozzle when the suction nozzle is in contact with the suction surface of the suction nozzle; A component holding performance inspection device comprising a negative pressure inspection device having a negative pressure sensor for detecting pressure.

(11) (a) The suction surface of the suction nozzle is brought into contact with the contact surface of the negative pressure tester and a negative pressure is supplied to the negative pressure supply device, and the detection hole is supplied by the negative pressure supply. A negative pressure detection control unit for causing the negative pressure sensor to detect a negative pressure in the detection hole at a plurality of points in the process of increasing the negative pressure of the negative pressure sensor; (b) detection by the negative pressure sensor under the control of the negative pressure detection control unit A main controller including a determination unit that determines whether the performance of the holding component of the electronic circuit component holding device is good or not based on the negative pressure values at the plurality of points in time. .

The component holding performance inspection device according to this section is suitable for implementing the component holding performance inspection method according to the above (1).

(12) The component holding performance inspection device according to the mode (11), wherein the plurality of time points is three or more time points. The component holding performance inspection device according to this section is suitable for implementing the component holding performance inspection method according to the above (2).

(13) The determination unit compares the negative pressure values of the detection holes at the plurality of times detected by the control of the negative pressure detection control unit with the preset standard negative pressure values at the plurality of time points. The component holding performance detecting apparatus according to the above mode (11) or (12), further comprising: a comparing section for performing the following, and determining whether the component holding performance is good or not based on a comparison result by the comparing section.

The component holding performance inspection apparatus according to this section is suitable for implementing the component holding performance inspection method according to the above (3).

(14) The first control device, wherein the main control device estimates a cause of a deterioration in component holding performance based on a difference in the detected negative pressure values at the plurality of times from the corresponding standard negative pressure values. The component holding performance inspection device according to item (13), further including a cause estimating unit. The component holding performance inspection apparatus according to this mode is suitable for implementing the component holding performance inspection method according to the above mode (4).

(15) The negative pressure detection control section causes the negative pressure sensor to detect the negative pressure for a plurality of suction nozzles, and the main control device controls the plurality of suction nozzles by the determination section. If it is determined that some of the nozzles have poor component holding performance and other suction nozzles have good component holding performance, the suction nozzle itself that is determined to have poor component holding performance is presumed to be defective. If it is determined that the component holding performance is defective for a number of suction nozzles greater than the number of the partial nozzles, a second cause for estimating that at least one of the negative pressure supply device and the negative pressure sensor is defective. The component holding performance inspection device according to any one of (11) to (14), including an estimation unit.

The component holding performance inspection device according to this section is suitable for implementing the component holding performance inspection method according to the above (5).

(16) The negative pressure detection control section causes the negative pressure sensor to detect the negative pressure for a plurality of types of suction nozzles having suction holes having different inner diameters, and the determination section includes: Based on the negative pressure values at the plurality of times detected for each of the plurality of types of suction nozzles, the quality of the holding component performance of the electronic circuit component holding device including the plurality of types of suction nozzles is determined (11). The component holding performance inspection device described in any of paragraphs) to (15).

The component holding performance inspection device according to this section is suitable for implementing the component holding performance inspection method according to the above (7).

(17) The determination unit is configured to set the standard negative pressure values at the plurality of points in time preset for each of the plurality of types of suction nozzles, and the standard negative pressure values at the plurality of points detected for each of the plurality of types of suction nozzles. The component holding performance detection device according to the above mode (16), further comprising: a comparing unit that performs comparison with each negative pressure value, wherein the quality of the component holding performance is determined based on a comparison result by the comparing unit.

The component holding performance inspection device according to this section is suitable for implementing the component holding performance inspection method according to the above (S).

(18) Based on the negative pressure supplied from the negative pressure supply device, a plurality of kinds of electronic circuit components are suction-held by each of a plurality of kinds of suction nozzles having suction holes having different inner diameters. A device for inspecting component holding performance of an electronic circuit component holding device, comprising:

A detection hole forming member attached to the inspection device main body so as to be relatively movable, and provided with a plurality of detection holes having different inner diameters on a contact surface capable of contacting the suction surface of the suction nozzle;

A detection hole switching device that automatically switches the plurality of detection holes by moving the detection hole forming member in accordance with the type of the suction nozzle to be inspected next among the plurality of types of suction nozzles;

A detection passage provided in the inspection device main body so as to be selectively communicated with each of the plurality of detection holes in accordance with the movement of the detection hole forming member;

A negative pressure sensor for detecting the negative pressure in the detection passage;

Wherein the inspection device main body, the detection hole forming member, the detection passage, and the negative pressure sensor constitute a negative pressure inspection device in cooperation with a portion of the detection hole switching device attached to the inspection device main body. A component holding performance inspection apparatus characterized in that:

When it is necessary to perform a holding performance test on a plurality of types of suction nozzles having different inner diameters of the suction holes, the detection hole forming members are automatically moved by the detection hole switching device, so that the inner diameters are different from each other. Of the plurality of detection holes, the one corresponding to the inside diameter of the suction hole of the suction nozzle to be inspected next is communicated with the detection passage. Then, the suction surface of the suction nozzle is brought into contact with the contact surface where the suction hole opens, a negative pressure is supplied to the suction hole of the suction nozzle by a negative pressure supply device, and the negative pressure of the detection hole is detected by a negative pressure sensor. Is detected by Therefore, it is possible to easily and quickly perform the holding performance test on a plurality of types of suction nozzles.

(19) A rotary detection hole in which the detection hole forming member is attached to the inspection device main body so as to be rotatable around a rotation axis, and wherein the plurality of detection holes are formed on a circumference around the rotation axis. The detection hole switching device includes a detection hole formation member rotating device that rotates the rotary detection hole formation member to a rotation position where each of the plurality of detection holes communicates with the detection passage (18). Item), the component holding performance inspection device.

Although it is possible to adopt a linear motion type detection hole forming member that moves linearly, according to the rotary type detection hole forming member, it is possible to form many detection holes in a relatively small space. Can be. Moreover, it is easy to make the moving device of the detection hole forming member simple and inexpensive.

(20) The detection hole switching device,

A detection hole forming member configured to move the detection hole forming member by a driving force of a driving source provided outside the negative pressure detector including the inspection device main body, a detection hole forming member, a detection passage, and a negative pressure sensor; A moving device;

A drive source control device that controls the drive source based on information on the type of the nozzle to be inspected next among the plurality of types of suction nozzles;

The component holding performance inspection apparatus according to the above mode (18) or (19), comprising:

Since a drive source external to the negative pressure tester is used as a drive source of the detection hole forming member moving device, the cost of the device can be reduced.

(21) The detection hole switching device is

A detection hole forming member moving device for moving the detection hole forming member by a driving source attached to the inspection device main body;

(22) At the time when the suction nozzle starts approaching the negative pressure tester, when the negative pressure supply device starts to supply negative pressure, and when the suction nozzle comes into contact with the negative pressure tester. (10) or (21) including a negative pressure detection start control device that causes the negative pressure sensor to start detecting a negative pressure in the detection hole at a time point having a predetermined fixed relationship. A component holding performance inspection device according to item 1.

(23) a nozzle elevating device for bringing the suction surface of the suction nozzle into contact with and separating from the contact surface of the negative pressure tester,

A negative pressure supply start control device that starts supplying a negative pressure to the negative pressure supply device in conjunction with a downward movement of the suction nozzle by the nozzle lifting / lowering device;

Negative pressure detection that causes the negative pressure sensor to start detecting the negative pressure of the detection hole at a time point having a predetermined fixed relationship with the time point at which the negative pressure supply device starts supplying the negative pressure to the suction nozzle. With start controller The component holding performance inspection device according to any one of (10) to (21), including:

In this way, the negative pressure supply start control device and the negative pressure detection start control device are linked to or associated with the lifting and lowering of the suction nozzle by the nozzle lifting / lowering device to control the start of the negative pressure supply and the negative pressure detection. For example, the negative pressure supply and the negative pressure detection can be easily started at an appropriate time. Also, in electronic circuit component mounting machines, the nozzle elevating device and the negative pressure supply start control device are often linked, and in such a case, if a negative pressure detection start control device is associated with them, it is sufficient. The configuration of this section is obtained.

(24) The detection hole switching device and the negative pressure detection start control device each include a driven member, and the component holding performance inspection device is provided commonly to the driven members, and both driven members are driven. The component holding performance inspection device according to the above mode (22) or (23), including a driving device provided with a driving member for selectively driving the member.

According to the feature of this mode, the drive device of the detection hole control device and the negative pressure detection start control device can be used in common, and the cost of the device can be reduced. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view schematically showing an electronic component mounting system including a component holding performance inspection apparatus according to an embodiment of the present invention.

FIG. 2 is a front view (partial cross section) showing a printed wiring board holding hut of the electronic component mounting system.

FIG. 3 is a front view (partial cross section) showing a mounting device of the electronic component mounting system. FIG. 4 is an enlarged front view (partially sectioned) showing a main part of the mounting device.

FIG. 5 is an enlarged front view (partial cross section) of another main part of the mounting device. FIG. 6 is a front sectional view showing a suction nozzle of the mounting device.

FIG. 7 is a front sectional view showing the direction switching valve and the valve switching device of the mounting device.

FIG. 8 is a functional block diagram conceptually showing a control device for controlling the electronic component mounting system.

FIG. 9 is a right side view of the negative pressure tester in the electronic component mounting system. FIG. 10 is a left side view of the negative pressure detector. FIG. 11 is an enlarged plan view showing a measuring section of the negative pressure tester.

FIG. 12 is a front sectional view of the measuring section shown in FIG.

FIG. 13 is a bottom view showing the measuring unit shown in FIG.

FIG. 14 is a functional block diagram conceptually showing a negative pressure detection control device for controlling the negative pressure tester.

FIG. 15 is a flowchart showing an inspection program for inspecting the component holding performance of the component mounting unit in the electronic component mounting system.

FIG. 16 is a diagram for explaining the time change of the negative pressure value of the suction nozzle.

FIG. 17 is a view conceptually showing a table for performing pass / fail judgment of the suction nozzle.

FIG. 18 is a circuit diagram showing a positive pressure / negative pressure supply device in an electronic component mounting system according to another embodiment of the present invention.

FIG. 19 is a plan view showing an electronic component mounting system including a component holding performance inspection device according to still another embodiment of the present invention.

FIG. 20 is a circuit diagram showing only a portion relevant to the present invention of the control device of the electronic component mounting system. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 indicates a base of the electronic component mounting system 12. On the base 10, a component supply device 14, a mounting device 16, and a printed wiring board holding and moving device 18 (hereinafter abbreviated as a wiring board holding and moving device 18) are provided, and an electronic component mounting system 1 2 Are composed.

The component supply device 14 includes two component supply tables 20 in the present embodiment. Each of these component supply tables 20 has a feeder support 22 and a plurality of feeders 24 mounted on the feeder support 22. Although the detailed illustration is omitted, the feeder 24 is configured to supply the electronic components in the form of taped electronic components by holding the electronic components on a component holding tape in the present embodiment. The plurality of feeders 24 are arranged such that their component supply units are aligned in a horizontal straight line. It is detachably mounted on the top. Hereinafter, for the entire electronic component mounting system 12, a direction parallel to the direction in which the feeders 24 are arranged is defined as an X-axis direction, and a direction orthogonal thereto is defined as a Y-axis direction. Each component supply table 20 is moved along the guide rail 30 by transmitting the driving force of the support base driving motor 26 as a driving source via the driving force transmission device 28. Moved in the direction. As a result, the component supply units of the plurality of feeders 24 are selectively positioned at the component supply positions.

The wiring board holding and moving device 18 moves the printed wiring board holding unit 42, which is a board holding device for holding the printed wiring board 40, which is a kind of circuit board, and the printed wiring board holding unit 42, and moves the printed wiring board. And a printed wiring board holding unit moving device 44 which is a substrate holding device moving device for moving 40. The printed wiring board holding unit moving device 44 includes an X-axis slide 52 and a Y-axis slide 60. The X-axis slide 52 is guided by a guide device including a guide rail 50 by an X-axis slide drive motor 46 and a driving force transmission device 48 and is moved in the X-axis direction. The Y-axis slide 60 is moved in the Y-axis direction on the X-axis slide 52 by the Y-axis slide drive motor 54 and the driving force transmission device 56, guided by a planning device including a guide rail 58. Let me do.

The Y-axis slide 60 supports the printed wiring board holding unit 42 from below, and the printed wiring board holding unit 42 holds the printed wiring board 40 in a horizontal posture from below. The surface of the printed wiring board 40 is horizontal, and the printed wiring board 40 is moved to an arbitrary position in a horizontal plane parallel to the surface by the movement of the printed wiring board holding unit 42. The printed wiring board holding unit 42 includes a main conveyor 66 as shown in FIG. The main conveyer 66 constitutes a printed wiring board conveyer in cooperation with a carry-in conveyer and a carry-out conveyer (not shown). Hold it and take it out of the system 12 after the installation work is completed. The printed wiring board holding unit 42 further includes a wiring board support device 70 that moves up and down with respect to the main conveyor 72 and supports the printed wiring board 40 from below with support members such as support pins 68. The printed wiring board 'holding unit 42 is constituted by the main conveyor 66, the wiring board support device 70 and the like. Although not shown, a plurality of, in this embodiment, two reference marks are provided on the surface of the printed wiring board 40, and an image is taken by a reference mark camera 74 (see FIG. 1) as an imaging device. Is done. In the illustrated example, the reference mark camera 74 is a surface imaging device that includes a CCD (charge-coupled device) and a lens system, and obtains a two-dimensional image of a subject at once. I have.

The mounting device 16 will be described with reference to FIGS. In FIG. 3, reference numeral 100 denotes a frame, which is fixedly provided above the base 10. A rotating shaft 102 is held by the frame 100 so as to be rotatable around a vertical rotating axis. The rotation of the rotating shaft 102 is intermittently rotated by a fixed angle by transmitting the rotation of an intermittent rotation motor 104 (see FIG. 8) as a driving source through an intermittent rotation mechanism not shown. .

An intermittent rotating body 106, which is a kind of moving member, is fixed to the lower end of the rotating shaft 102. In the intermittent rotator 106, a plurality of sets of component mounting units 108 are held at equal angular intervals on a circle around the rotation axis of the rotation shaft 102. The plurality of sets of component mounting units 108 are rotated by an angle equal to the above-mentioned holding angle interval with the intermittent rotation of the intermittent rotating body 106, and the component receiving position and the component holding set on the turning locus. The machine stops sequentially at the same number of stop positions as the component mounting unit 108, including the posture detection position, component posture correction position, component mounting position, and nozzle selection position.

As shown in FIG. 3, a cylindrical cam 110 is fixed to the lower surface of the frame 100. At the lower part of the cylindrical cam 110, a cam groove (not shown) is formed which opens to the outer peripheral surface, and a pair of rollers 114 attached to the elevating member 112 of each component mounting unit 108 is provided. It is rotatably engaged. The height of the cam groove changes gradually in the circumferential direction. When the component mounting unit 108 is rotated as described above, the rollers 114 move in the cam groove. Can be raised and lowered. A plurality of guide blocks 116 are fixed to the outer peripheral surface of the intermittent rotating body 106 at equal angular intervals to constitute a guide device, and guide the ascending and descending members 112 to rise and fall.

A cylindrical sleeve 1 18 serving as a support member is fixed to the outer surface of the elevating member 1 1 2, and the rod 1 20 is rotatable around the vertical axis of rotation on the sleeve 1 18. Are fitted so that they cannot move relative to each other. At the lower end of the rod 120, a rotation holder 124 is rotatably held around a horizontal rotation axis via a mounting member 122, and a plurality of suction nozzles 126 are arranged at equal angular intervals. It is held radially. One of the suction nozzles 126 is selectively positioned at a vertically downward use position by rotating the rotary holder 124 by a nozzle selection device (not shown) provided at the nozzle selection position. You. In this use position, the axis of the suction nozzle 126 coincides with the axis of the mouth 120.

Each of the plurality of suction nozzles 126 sucks and holds the electronic component 130 (see FIG. 5) by negative pressure, and as shown in FIG. It has a suction tube 1 3 4 fitted to 1 3 2 and a nozzle body 1 32. In the illustrated example, the plurality of suction nozzles 126 are of different types, but the length of the suction tubes 134 is the same. As shown in Fig. 4, the suction nozzle 1 26 positioned at the position of use includes a passage provided inside the rod 120, etc., and a directional control valve 1 36, which is a control valve fixed to the sleeve 118, etc. Is connected to a vacuum pump 1338 (see FIG. 7), which is a kind of negative pressure source. These passages constitute a connection passage 13 7 that connects the vacuum pump 13 8 to the suction nozzle 12 6 .The directional control valve 13 6, the connection passage 13 7, and the vacuum pump 13 8 have a negative pressure. It constitutes a supply device 13 9 (see Fig. 7).

As shown in Fig. 3 to Fig. 5, the component mounting unit 108 is moved up and down in the vicinity of the component receiving position and the component mounting position of the frame 100 and the cylindrical cam 110, and suction is performed. A nozzle elevating device 140 is provided, which is a nozzle axial moving device that moves the nozzle 126 in the axial direction and moves it up and down. The nozzle lifting device 140 has a lifting member 144 and a lifting member driving device 144. The elevating member driving device 144 includes a cam 144 rotating by using the intermittent rotation motor 104 as a drive source, a cam follower 144 following the cam 144, and a movement of the cam follower 144 to elevate the member 144. And a motion transmission device 1 48. The elevating member 144 can move up and down along a guide rail 150 fixed to the cylindrical cam 110. The elevating member 14 2 has a horizontal guide groove 15 2 connected to the cam groove of the cylindrical cam 110 when the elevating member 14 is at the upper end position. Ascending and descending with rollers 1 1 4 engaged By moving the member 142 up and down, the component mounting unit 108 and the suction nozzles 126 are moved up and down.

The direction switching valve 1 36 will be described. As shown in Fig. 7, the directional control valve 1336 has a spool 164 serving as a valve fitted in a valve hole 162 of the housing 160 so as to be relatively movable, and switches the connection passage 1337. Is what you do. A negative pressure port 166, a nozzle port 168 and an atmospheric pressure port 170 are formed in the housing 160 in order from the top. The nozzle port 168 is communicated with the suction nozzle 126 via a passage formed in the mouth 120 or the like. The negative pressure port 166 is connected to the vacuum pump 138 via the connection passage 137. A normally closed solenoid on-off valve 169 is provided in the connection passage 137. The atmospheric pressure port 170 is always in communication with the atmosphere.

When the spool 16 4 is moved to the lower end position with respect to the housing 16 0, the directional control valve 13 6 is in a negative pressure supply state in which the suction nozzle 12 6 communicates with the vacuum pump 13 38. In this state, a part of the spool 164 projects downward from the lower surface of the housing 160. In addition, when the spool 164 is moved to the rising end position with respect to the housing 160, the directional switching valve 136 is in an atmosphere communication state in which the suction nozzle 126 is communicated with the atmosphere. In this state, a part of the spool 164 projects from the upper surface of the housing 160.

As shown in FIG. 4, the sleeve 118 is provided with a switching pin 174 serving as a switching assist member for assisting the switching of the directional switching valve 136, and corresponds to the component receiving position of the frame 100. A switching lever 176 for switching the direction switching valve 136 is provided at the portion in a stationary manner. The switching pin 174 and the switching lever 176 constitute a valve switching device 178 at the component receiving position. On the other hand, as shown in FIG. 5, a part corresponding to the component mounting position of the frame 100 includes a valve switching device 180 for switching the directional control valve 136 and a part of the positive pressure supply device 182. Are provided. The directional control valve 1 36 provided on the sleeve 1 18 and the valve switching device 180 kept at a standstill are such that the directional control valve 1 36 is raised and lowered by the nozzle lifting device 140. Thus, they can be relatively moved up and down.

At the protruding end of the placket 190 from the frame 100, as shown in FIG. The switching member 192 is held so as to be able to move up and down with respect to the bracket 190. The switching member 1992 is moved upward by the compression coil spring 196 which is an elastic member provided between the spring receiving portion 194 provided on the bracket 190 and the direction switching valve 136. It is urged to approach the spool 16 4. The switching member 1992 is provided with a positive pressure supply passage 198 that opens on the upper surface, which is the surface facing the directional switching valve 1336, and opens to face the aforementioned atmospheric pressure port 170. It is connected to an air pump 202 which is a kind of positive pressure source via a joint member 200 and the like. A normally closed solenoid on-off valve 204 serving as an electromagnetic control valve is provided between the air pump 202 and the coupling member 200 to supply positive pressure (compressed air) to the positive pressure supply passage 198. Are allowed and cut off. When the directional control valve 136 descends, the switching member 192 makes the directional control valve 136 communicate with the atmosphere, and the positive pressure supply passage 198 is connected to the atmospheric pressure port 170 to be constant. The positive pressure is supplied for a short time, and the release of the electronic component 130 by the suction nozzle 126 is promoted.

The electronic component mounting system 12 is controlled by a control device 220 shown in FIG. The control device 220 is mainly composed of a computer 228 having a CPU 224, a ROM 224, a RAM 226 and a bus connecting them. An I / O interface 230 is connected to the path, and various sensors and the like, not shown, are connected to the path. Various actuators such as a support base drive motor 26 are also connected to the input / output interface 230 via a drive circuit 232. The support base driving motors 26 and the like each constitute a driving source, and in this embodiment, each is constituted by a servomotor. Although not shown, the rotational position of the support base driving motor 26 and the like is detected by an encoder, and the motor and the like are controlled based on the detection result.

The reference mark camera 74 and the component camera 236 are further connected to the input / output interface 230 via a control circuit 234. The component camera 236 is provided at the component holding posture detection position, and in the illustrated example, is a surface imaging device including a CCD and a lens system similarly to the reference mark camera 74. The drive circuit 232, the control circuit 234 and the computer 228 constitute a control device 220. In addition, the electronic component 130 is mounted on the printed wiring board 40 in the RAM 226. For example, various programs, data, and the like, such as a program for executing the program, are stored. As shown in FIG. 1, a negative pressure detector 250 is detachably attached to one end of the feeder support 22 of the component supply device 14 in the X-axis direction. Details of the negative pressure tester 250 are shown in FIGS. 9 to 13. The tester main body 252 of the negative pressure tester 250 is configured in the same manner as the feeder main body of the feeder 24, has a generally elongated plate shape, and has a lower portion connected to the feeder support base 22. It is provided with an engagement portion 254 for engagement. The description of the engaging portion 254 is omitted because it has a well-known configuration. The negative pressure detector 250 can be attached to and detached from a slot for mounting the feeder 24 formed on the feeder support 22, and can be installed in any slot.

The negative pressure detector 250 is a detection hole that is open so that it can communicate with the negative pressure sensor 260 (see FIG. 11) and the suction hole 26 1 of the suction nozzle 1 26 (see FIG. 6). A detection hole forming member 264 formed with a plurality of 262 and one of the plurality of detection holes 262 is selectively positioned at an operation position communicating with the negative pressure sensor 260. And a detection hole switching device 26 (see FIG. 9). The detection hole forming member 2 6 4 is formed in a disk shape, and has a plurality of detection holes 2 6 2 opening at the upper surface 2 6 8 which is a contact surface which contacts the suction surface of the suction nozzle 1 3 4 of the suction nozzle 1 2 6 In the illustrated example, 16 are formed. The diameter of each detection hole 262 is set equal to the inner diameter of the suction hole 261 of the component suction nozzle 126. The detection hole forming member 264 is held intermittently rotatable about a vertical axis in a posture horizontal to the inspection device main body 252.

The detection hole switching device 266 includes a rotation drive device 270 for intermittently rotating the detection hole forming member 264. The rotation driving device 270 rotates the detection hole forming member 264 by the driving force of a driving source provided outside the negative pressure inspection device 250. In the present embodiment, the rotary driving device 270 is operated by the driving force of a driving roller 272 (see FIG. 9) which is a driving member for driving the tape feeder of the feeder 24, and forms a detection hole. Rotate member 2 6 4. The drive roller 272 is provided in the mounting device 16 and is moved up and down in synchronization with the suction nozzle 126 when the suction nozzle 126 sucks the electronic component 130.

The driven member 274 driven by the driving roller 272 has a substantially vertical posture. It is provided in. The driven member 274 is provided at a position coinciding with the drive roller 272 in the Y-axis direction, and is driven by levers 276 and 278 that are rotatably attached to the inspection device main body 252. Is held. Specifically, the upper end of the driven member 274 is connected to one end of the lever 276 so as to be relatively rotatable. The lever 276 is rotatably supported by the inspection device main body 252 at the end opposite to the driven member 274. The lever 278 is provided with a pair of arms 280 and 282 extending in directions orthogonal to each other, of which the free end of the first arm 280 extending in a substantially horizontal direction from the center of rotation. The lower end of the driven member 274 is connected thereto. A parallelogram link is formed by the repeller 2 76, the first arm 280, the driven member 2 74, and a part of the detector main body 2 52, and the driven member 2 7 4 It moves up and down almost vertically while maintaining its posture. A tension coil spring 284, which is an elastic member, is engaged near the free end of the first arm 280, and the link 278 is attached to a direction that rotates the driven member 274 in a direction to raise the driven member 274. I'm going. On the other hand, a stopper 2886 is provided on the inspection device main body 252, and defines a rotation limit of a direction in which the driven member 274 of the lever 2776 is lifted. As a result, the driven member 274 is positioned at its raised end position.

A second arm 282, which is the other arm, extends vertically downward from the center of rotation of the lever 278. The free end of the second arm 282 can be moved in a substantially horizontal direction if the repeller 278 is rotated as the driven member 274 moves up and down. This axial movement is transmitted by a connecting rod 2888 to a ratchet apparatus 2900, which is a motion converting apparatus, and is converted into an intermittent rotary motion. The ratchet wheel 292 of the ratchet device 29 is connected to the detection hole forming member 264 by a rotating shaft 298, and rotates integrally. A positioning recess 300 is provided on the outer peripheral surface of the detection hole forming member 260 corresponding to each of the detection holes 260. A positioning claw 304 is provided in the positioning recess 300. By being engaged by the compression coil spring 360 as an elastic member, the reverse rotation of the detection hole forming member 264 is prevented, and the rotation stop position is accurately defined. Thereby, one of the plurality of detection holes 262 is accurately positioned at the detection position, and is communicated with the negative pressure sensor 260 through the passage 312. The present negative pressure tester 250 further includes a detection instruction device 320 for indicating the timing of starting the negative pressure detection work. The detection instruction device 320 includes a driven member 322 driven by a driving roller 272, and the driven member 322 includes a lever 322 as in the detection hole switching device 266. A parallelogram link is formed in cooperation with 4, 3 26 and the inspection device main body 2 52. A dog 328 is fixedly provided on the driven member 322, and the photomicro sensor 330 is turned on and off in accordance with the elevation of the driven member 322.

The negative pressure inspection device 250 is further provided with a control valve return device 332 for returning the direction switching valve 136 to an atmosphere communication state in which the suction nozzle 126 is communicated with the atmosphere. This is because, after switching the directional control valve 1336 to the negative pressure supply state for negative pressure inspection, the component mounting unit 108 is provided with a valve switching device 180 as a control valve return device. This is because the direction switching valve 1336 can be returned to the atmosphere communication state without turning to the component mounting position. The control valve return device 332 includes a first lever 333 and a second lever 334 that are rotatably attached to the detector main body 252. These two repellers 3 3 3 and 3 3 4 are rotated in opposite directions by a U-shaped notch 3 3 5 as a first engaging portion and a pin 3 3 6 as a second engaging portion. Have been engaged. In addition, the first lever 3 3 3 is linked with the driven member 3 2 2 (in the illustrated example, by the engagement of the elongated hole and the pin), and the first lever 3 2 3 3 3 is rotated, and the second lever 3 3 4 is rotated. The second lever 3 3 4 is integrally provided with an operation arm 3 38. When the driven member 3 2 2 is lowered to near the lower end position, the distal end of the operation arm 3 3 8 Engage the lower end of 36 spool 16 and push it up to return directional valve 1 36 from negative pressure supply to atmospheric communication. The action arm 338 is not located at the component receiving position, that is, the component mounting unit 108 at the negative pressure inspection position, but at the component mounting unit 108 stopped at the stop position adjacent to the negative pressure inspection position. Acts on directional valve 1 36 to return it to atmospheric communication.

The present negative pressure detector 250 is controlled by a negative pressure detection control device 340 shown in FIG. The negative pressure detection control device 340 includes an internal power supply 342, and similarly to the control device 220, the CPU 222, the ROM 224, the RAM 226, and the bus connecting them. It is mainly composed of a computer 228 equipped with a computer. The input / output interface 230 is connected to the bus. The input / output interface 230 is connected to the photomicrosensor 330 described above and the negative pressure sensor 260 described above. Negative pressure detection by the negative pressure sensor 260 is started according to a change in the output signal of the photomicrosensor 330. For example, as the output signal of the photomicrosensor 330 changes from OFF to ON, the computer 228 starts reading the output value of the negative pressure sensor 260. The input / output interface 230 is also connected to the control device 220 of the electronic component mounting system 12. The RAM 222 obtains the detection value of the negative pressure sensor 260, and based on the obtained detection value, a detection program and a necessary standard value for estimating the state of the suction nozzle 126. And other data are stored.

The negative pressure tester 250 is not always connected to the control device 220, but may be connected to the control device 220 as necessary.

Hereinafter, the operation will be described. The component mounting work of the electronic component mounting system 12 will be briefly described because it is well known. When the printed wiring board 40 is loaded, first, the fiducial mark camera 74 is positioned so that the fiducial mark is positioned within its imaging range, and the fiducial mark and its surroundings are imaged. The displacement in the direction parallel to the 40 surface is obtained. After that, the mounting device 16 mounts the electronic component 130 on the printed wiring board 40. The intermittent Hi rolling body 106 is intermittently rotated by the intermittent rotating device, and the plurality of component mounting units 108 are sequentially moved to the component receiving position and the like.

The component mounting unit 108 is stopped at the component receiving position, and when the electronic component 130 is received, the suction nozzle 126 is lowered by the nozzle lifting device 140. When the suction nozzle 1 2 6 moves to the component receiving position, the direction switching valve 1 3 6 is switched to the air communication state, and when the component mounting unit 1 08 descends, the switching pin 1 7 4 switches the switching lever 1 Engage with 76 and rotate its tip. As a result, the switching lever 176 engages with the spool 164, moves the spool 164 downward with respect to the housing 160, and moves the directional switching valve 136 from the air communication state to the negative pressure. Switch to supply state. As a result, a negative pressure is supplied to the suction nozzles 126 and the electronic components 130 are discharged. Adsorb. After the suction of the electronic component 130, the suction nozzle 1 26 is raised and the swivel is started, and when the switching pin 17 4 is disengaged from the switching lever 17 6, the switching lever 17 6 is Then, it is returned to the original position shown in FIG. 4, and enters a standby state in preparation for entry of the next component mounting unit 108 between the switching pin 174 and the spool 164. The suction nozzle 126 holding the electronic component 130 is moved to the next stop position by the intermittent rotation of the intermittent rotating body 106. When the suction nozzle 126 reaches the component holding posture detection position, the electronic component 130 held by the suction nozzle 126 is imaged by the component camera 236. Then, the imaging data is subjected to image processing, and a calculation of a holding position error of the electronic component 130 by the suction nozzle 126 is performed. Thereafter, if the component mounting unit 108 is moved to the component holding posture correction position, the component mounting unit 108 is rotated around its own axis, and the rotational position error is corrected. Slightly before the component mounting unit 108 reaches the component mounting position, the suction nozzles 126 are lowered by the nozzle elevating device 140, and the electronic components 130 are mounted on the printed wiring board 40. Place.

At this time, the directional control valve 1336 is switched from the negative pressure supply state to the atmosphere communication state in conjunction with the lowering of the suction nozzles 126. When the elevating member 14 2 is lowered, the directional control valve 13 6 fixed to the sleeve 1 18 is also lowered, approaching the valve switching device 18 0, and the switching member 19 2 is moved to the spool 16. Contact 4 When the elevating member 14 2 is further lowered, the spool 16 4 is pushed by the switching member 19 2 and pushed into the housing 16. By the movement of the spool 164 with respect to the housing 160, the direction switching valve 136 is switched from the negative pressure supply state to the atmosphere communication state. In this way, the suction nozzle 1 26 is lowered, the electronic component 130 is placed on the printed wiring board 40, and the directional control valve 13 36 is switched from the negative pressure supply state to the atmosphere communication state. At this time, the positive pressure supply passage 170 is connected to the positive pressure supply passage 198, compressed air is blown into the positive pressure supply passage 170, compressed air is supplied to the suction nozzles 126, and electronic components Release of the 130 from the suction nozzles 126 is promoted.

Next, the operation of the negative pressure tester 250 will be described based on the test program shown in the flowchart of FIG. The operation of detecting the negative pressure of the suction nozzles 126 in order to detect the component holding performance by the negative pressure inspection device 250 in the present embodiment is performed at the start of operation. Alternatively, this is performed when the electronic component mounting system 12 is started after the setup change including nozzle replacement, but at regular intervals during the work, or suction error or abnormal suction is detected for any of the suction nozzles 126. It may be executed when it occurs. If the execution of the inspection is instructed by an operator's input or automatically, first, in step S 1 (hereinafter simply referred to as S 1, the same applies to other steps), the feeder support 22 is moved. Then, the negative pressure inspection device 250 is positioned near the component supply position. Specifically, the negative pressure detector 250 is positioned at a detection hole switching position where its driven member 274 is located immediately below the driving roller 272. Next, in S2, the drive roller 272 is moved up and down to move the driven member 274 up and down, so that the detection hole 262 is switched. The inside diameter of the suction tube 1 34 of the suction nozzle 1 26 to be inspected this time is specified in advance, and the detection hole 26 2 having the same inside diameter is positioned at a communication position communicating with the negative pressure sensor 260. In this embodiment, prior to the start of the inspection, the detection hole forming member 264 is positioned at a predetermined original position by an operator, and the driven member 274 is lowered from that state. The number of times that the detection hole 262 has been changed, that is, the number of times that the detection hole 262 has been changed, is counted, and which detection hole 262 is currently selected based on the number of force points (the force that is positioned at the action position). You can see. However, it is also possible to provide a selective detection hole specifying device capable of specifying the currently selected detection hole 252 without the assistance of an operator. For example, the negative pressure tester 250 is provided with a rotational position detector for detecting the rotational position of the detection hole forming member 264 or an original position detector for detecting the original rotational position.

Next, in S3, the negative pressure tester 250 is moved by moving the feeder support base 22 so that the driven member 32 2 is moved under the negative pressure located immediately below the drive roller 27 2. It is positioned at the detection position (the same as the component supply position in the present embodiment). In this state, proceeding to S4, the component mounting unit 108 positioned at the component receiving position is the same as the component receiving operation of receiving the electronic component 130 from the feeder 24 positioned at the component supply position. The component holding unit 108 is operated, and the component holding unit 108 is inspected for the component holding performance.

In the above operation, the driving roller 27 is raised and lowered, and accordingly, the dog 3 2 8 is raised and lowered to shield the photomicrosensor 330 from light. The light-blocking timing of the photo microphone mouth sensor 330 is detected as the falling timing of the dog 328, that is, the falling timing of the suction nozzle 126, and the reading of the detection value of the negative pressure sensor 260 is started. Measurement is called). Specifically, the negative pressure value is read every time a plurality of different preset times have elapsed from the start of the measurement. In the present embodiment, as shown in FIG. 16, four set times are set for one detection, and a negative pressure value is detected each time the set time elapses. This negative pressure detecting operation is continuously performed on the suction nozzles 126 of all the component mounting units 108 of the mounting device 16 having the same diameter. In addition, to detect the negative pressure, the directional control valve 1 36 set to the negative pressure supply state is returned to the atmosphere communication state by the control valve return device 332.

Next, in S5, it is asked whether negative pressure detection has been completed for all the suction nozzles 126 whose component holding performance is to be inspected this time. For example, when inspecting a plurality of types of suction nozzles 1 26, if there is a suction nozzle for which negative pressure detection has not been completed, the determination in S5 is NO, and this program is executed once. Ends. Until the inspection is completed for all the suction nozzles 1 26 to be inspected, S 1 or S 5 is repeatedly executed. On the other hand, when the negative pressure detection is completed for all the suction nozzles 1 26, the determination in S5 becomes Y E S and the process proceeds to S6.

In S6, the detected negative pressure value of each of the suction nozzles 126 is compared with a preset negative pressure value. Specifically, the ram 226 of the negative pressure detection control device 340 includes a standard negative pressure value that should be detected under normal conditions for the various suction nozzles 126 (hereinafter referred to as “standard”). Is stored in advance for each set time. As shown in Fig. 16, when the suction nozzle 126 is normal, a high negative pressure can be obtained in a relatively short time, and then the pressure gradually decreases relatively slowly toward the value to be finally reached. Increase. The standard value is set based on such knowledge, and in the present embodiment, the standard value is set with a certain width. By comparing the detected value with the standard value, it is determined whether or not the detected value is within the range of the standard value at each measurement point. Next, based on the result of the comparison in S6, in S7, the quality of the suction nozzles 126 and the cause of the abnormality are estimated in accordance with the quality determination table shown in FIG. Figure In 17, 〇 indicates the case where the detected value is within the range of the standard value, and X indicates the case where the detected value is outside the range of the standard value. In the illustrated example, at all the measurement points, when the detected value is within the standard value range (indicated by (a) in FIG. 17), it is determined that the suction nozzles 126 are normal. On the other hand, if there is at least one of the four measurement points whose detected value is not in the range of the standard value, it is determined that there is some defective component holding performance (abnormal).

If it is determined that there is any abnormality, the cause of the abnormality is estimated based on the change in the detected value. For example, if the suction nozzles 1 26 are clogged, the amount that can be suctioned is limited, so the value to be reached is finally obtained, but it takes time to reach there Tend. On the other hand, if any part is leaked due to deformation or breakage of the suction tube 134 of the suction nozzle 126, a value to be reached cannot be obtained even after a certain period of time. Based on such knowledge, in the present embodiment, when it is determined that there is some abnormality, at least the detection value at the first measurement point is out of the range of the standard value, and If the detected value at the fourth measurement point is within the standard value range (indicated by (mouth) and (c) in Fig. 17), the suction nozzle 1 26 is clogged. It is estimated to be. If the detected values at the first to third measurement points are out of the range of the standard values and only the detected values at the fourth measurement point are normal (indicated by (2) in Fig. 17), It is estimated that the suction nozzles 126 are clogged or leaking. Furthermore, if the detected values are abnormal at all the measurement points (indicated by (e) in the figure), it is estimated that the suction nozzles 126 have leaked.

Next, the pass / fail judgment of the negative pressure sensor 260 and the negative pressure supply device 139 is performed based on the pass / fail judgment of each of the suction nozzles 126. If the number of suction nozzles 126 determined to be abnormal is relatively large, the negative pressure sensor 260 or negative pressure supply device 133 There is a high possibility that there is an abnormality. Therefore, for example, if it is assumed that a negative pressure test was performed on 12 suction nozzles 126 this time, it is determined in S8 that all of the suction nozzles 126 are in an abnormal state due to clogging or leakage. It is asked whether the number n of the defective suction nozzles is smaller than a preset value N, which is set in advance. Set value N! Is, in the present embodiment, Although set to 12 which is the total number of the suction nozzles 126, it may be set to a value less than 12, for example, 10 to 11 may be set. If the number of suction nozzles 126 subjected to the negative pressure test is larger than 12, the number may be equivalent to the total number of the suction nozzles 126, for example, set to a value of 80% or more. May be done.

Assuming that the number n of the defective suction nozzles determined to be defective in this inspection is 1 2, the determination of S 8 is NO, the process proceeds to S 9, and the negative pressure sensor 260 It is estimated that at least one of the pressure supply devices 139 is abnormal, and the operator is notified to that effect.

On the other hand, if the number n of the defective suction nozzles is smaller than the set value N, (= 1 2), the determination of S8 becomes YES, the process proceeds to S10, and the number n of the defective suction nozzles becomes the set value. It is asked whether it is N 2 or less. The set value N2 is set to a smaller number than the above set value N, and is set to 1 in the present embodiment. If the number n of defective suction nozzles is equal to or less than the set value N ₂ (= 1), the determination of S 10 is YES, the process proceeds to S 11, and an abnormality has occurred in each of the suction nozzles 1 26. The worker is notified of the identification symbol indicating the suction nozzle 126 in which the abnormality has occurred and the cause of the abnormality estimated in S7.

On the other hand, when the number n of the defective suction nozzles is larger than the set value N ₂ (= 1), the process proceeds to S 12 and the operator is notified of that. In such a case, both the case where the suction nozzle 126 is abnormal and the case where the negative pressure sensor 260 or the negative pressure supply device is abnormal can be considered. Workers are to make decisions. Instead of leaving the judgment to the operator in S12, a flow for automatically estimating the flow may be created and used. This completes one execution of this program.

When it is estimated that the suction nozzle 1 26 has an abnormality due to the negative pressure detection work described above, and the fact is communicated to the worker, the worker performs the suction nozzle 1 2 6 based on the information. Perform 6 cleaning or replacement. The replacement and the cleaning may be automatically performed. For example, dust may be blown off by applying a higher positive pressure to the suction nozzle 126 than when promoting the release of the electronic component 130, and the inside of the nozzle may be mechanically cleaned by an automatic cleaning device. It may be. The latter depends on the former May be executed when the blowing effect is insufficient.

As is clear from the above description, in the present embodiment, in the computer 228 of the negative pressure detection control device 340, the part that executes S6 of the inspection program constitutes the comparison unit, The part executing step 7 constitutes a first cause estimating unit, and the part executing steps S8 to S12 constitutes a second cause estimating unit.

In the above embodiment, a part of the positive pressure supply device 182 is provided in the valve switching device 180 and another part is provided in the directional switching valve 136. The valve switching device and the positive pressure supply device may be provided separately. One embodiment is shown in FIG. Note that components and the like that perform the same operations as those in the above embodiment are given the same reference numerals, and descriptions thereof will be omitted. In the mounting device 400 of the present embodiment, as schematically shown in FIG. 18, the suction nozzles 126 are connected to the vacuum pumps 1338 by switching the direction switching valves 402, 404. The air pump 202 is selectively communicated with the atmosphere.

The directional control valve 402 is provided in a connection passage 406 connecting the suction nozzle 126 and the vacuum pump 138, and the directional control valve is provided in addition to the suction nozzle 126 and the vacuum pump 138. 404 is connected. The direction switching valve 404 is connected to the air pump 202 and the atmosphere in addition to the direction switching valve 402. The directional control valve 402 is connected to the negative pressure supply state that allows the suction nozzles 126 to communicate with the vacuum pump 138 by moving the valve, and to the atmosphere or the air pump 202 via the directional control valve 404. It can be switched to the communication state. This valve is configured to be maintained at the position where the direction switching valve 402 is moved to the position for switching between the above two states.

The direction switching valve 404 is switched between a positive pressure supply state in which the suction nozzles 126 are connected to the air pump 202 to supply a positive pressure, and an atmosphere communication state in which the direction is connected to the atmosphere. The valve element of the directional control valve 404 is urged by a spring in a direction to switch the directional control valve 404 to the atmosphere communication state. The valve switching devices 408, 410 for switching the direction switching valves 402, 404 are provided on the same member indicated by a two-dot chain line, and are used for raising and lowering the suction nozzles 126 by the nozzle lifting device 140. It works in conjunction.

In each of the above embodiments, the suction nozzle is rotated around one axis by the nozzle turning device. It was moved to the component receiving position and component mounting position to receive and mount electronic components.However, the XY port bot, which is a component holding device moving device or component mounting unit moving device, The electronic component may be moved to an arbitrary position parallel to the surface of the circuit board to receive and mount the electronic component. An electronic component mounting system of this type is already known in, for example, Japanese Patent No. 2824378, and will be briefly described.

In FIG. 19, reference numeral 500 denotes the base of the electronic component mounting system 502. On the base 500, there are provided a component supply device 504, 506, a mounting device 508, a printed wiring board holding device 510, a wiring board conveyor 511, etc., and an electronic component mounting system. The system 502 is configured. The printed wiring board holding device 5 10 is constituted by a device similar to the printed wiring board support device 70 of the printed wiring board holding unit 42 and a part of the wiring board conveyor 5 12, Hold board 40 horizontally. The transport direction of the circuit board conveyor 512 is referred to as an X-axis direction, and a direction orthogonal to the X-axis direction in a horizontal plane is referred to as a Y-axis direction.

The component supply devices 504 and 506 are provided on both sides in the Y-axis direction of the wiring board conveyor 512, respectively. One component supply device 506 is a feeder-type component supply device, and is provided in a fixed position. The other component supply device 504 is a tray-type component supply device, and is provided at a fixed position.

The mounting device 508 includes a component holding device 514 including a nozzle holder for holding a suction nozzle, and an XY robot 516. The XY robot 516 is provided on the X-axis slide 518 and the X-axis slide 518, which are driven by the X-axis slide 518 and the X-axis slide drive motor 520. Includes Y-axis slide 524 and Y-axis slide moving device 528 using Y-axis slide drive motor 526 as a drive source. The component holding device 514 is attached to the Y-axis slide 524, and is a movable member that can move to any position on the XY coordinate plane.It can rotate around the vertical axis and move up and down in the axial direction. The electronic component 130 is lifted and lowered by the lifting device 530 provided on the movable member, and receives the electronic components 130 from the component supply devices 504 and 506, and the printed wiring board 40 is provided. Attach to The lifting device 530 uses a servomotor as a drive source. The suction nozzle of the component holding device 5 14 is operated by a negative pressure similarly to the suction nozzle 1 26. The electronic component 130 is sucked and released by the supply of positive pressure.

As shown in FIG. 20, the electronic component mounting system 502 includes an electromagnetic directional switching valve 540, instead of the directional switching valve 136 and the valve switching device 178, 180 in the embodiment. A directional switching valve device composed of 542 (which may be a combination of a plurality of electromagnetic on-off valves) is provided. The switching instruction signal to the electromagnetic directional switching valves 540 and 542 is output in synchronization with the operation of the lifting device 530 for raising and lowering the component holding device 514. FIG. 20 shows a portion related to the output of the switching command signal for starting the supply of the negative pressure to the electromagnetic directional control valve 540 which is closely related to the present invention. The signal obtained by delaying the operation start command signal to 530 by the delay circuit 546 for a fixed time is used as the switch command signal to the electromagnetic directional control valve 540. In addition, instead of the feeder 24, the feeder type component supply device 506 is provided with a negative pressure detector 548 similar to the negative pressure detector 250 in the above embodiment (see FIG. 19). ) Can be attached. However, the negative pressure tester 548 has a built-in jaw cylinder 550 as a drive source of the detection hole switching device, but does not have a device corresponding to the detection instruction device 320. The reading of the detection value of the negative pressure sensor 260 is started using a switching command signal to the direction switching valve device of the component holding device 514. A switching command signal to the electromagnetic directional switching valve 540 for switching the directional switching valve device to the negative pressure supply state is supplied to the computer 544, and the computer 544 detects the negative pressure sensor 260 in response thereto. Reading of the value is started.

After the computer 544 itself issues a command to the elevating device 530 to start descending the component holding device 514, the electromagnetic directional switching valve 540 waits for a certain period of time. It is also possible to output a switching command signal to the switch. In addition, the computer 544 operates the negative pressure sensor 260 in response to a detection signal of a descent detector (for example, a photo micro sensor can be used) that detects that the component holding device 514 has been lowered to a predetermined position. It is also possible to start reading the detected value of.

As described above, some embodiments of the present invention have been described in detail, but these are merely examples, and the present invention is based on the knowledge of those skilled in the art, including the embodiments described in the section of [Disclosure of the Invention]. Various modifications and improvements can be made based on this.

Claims

The scope of the claims

1. A method for inspecting the component holding performance of an electronic circuit component holding device that suctions and holds an electronic circuit component by a suction nozzle based on a negative pressure supplied from a negative pressure supply device, the method comprising: A detection hole which is opened to be able to communicate with a suction hole of the suction nozzle when the suction nozzle is in contact with the contact surface, and a negative pressure sensor which detects a negative pressure of the detection hole. Preparation process for preparing a negative pressure tester equipped with

A component holding performance inspection method characterized by including:

2. The method for detecting component holding performance according to claim 1, wherein the plurality of time points are three or more time points.

3. The determination step includes a comparison step of comparing the negative pressure values of the detection holes at the plurality of times detected in the detection step with the preset standard negative pressure values at the plurality of time points, 3. The component holding performance detecting step according to claim 1 or 2, which is a step of determining whether the component holding performance is good or not based on a comparison result in the comparing step.

4. The range of the request including a first cause estimation step of estimating a cause of the deterioration of the component holding performance based on a difference in the detected negative pressure values at the plurality of time points from the corresponding standard negative pressure value. Item 3. The component retention performance inspection method described in item 3.

5. A plurality of suction nozzles are inspected using a common negative pressure tester, and in the determination step, part holding performance of some of the plurality of suction nozzles is poor, When it is determined that the component holding performance of the suction nozzle is good, the suction nozzle itself whose component holding performance is determined to be defective is estimated to be defective, and the component is determined for the number of suction nozzles larger than the number of some of the suction nozzles. If the holding performance is determined to be poor The component holding performance inspection method according to any one of claims 1 to 4, further comprising a second cause estimating step of estimating that at least one of the negative pressure supply device and the negative pressure sensor is defective. .

6. Some of the plurality of suction nozzles are suction nozzles whose number is equal to or less than a product of the number of the plurality of suction nozzles and a first set ratio, and a number greater than the number of the some nozzles is 6. The component holding performance inspection method according to claim 5, wherein the number is larger than the first set ratio and is equal to or larger than the product of the second set ratio and the number of the plurality of suction nozzles.

7. The component holding performance of the electronic circuit component holding device that sucks and holds each electronic circuit component by a plurality of types of suction nozzles having suction holes with different inner diameters based on the negative pressure supplied from the negative pressure supply device. A method for inspecting

A plurality of contact surfaces capable of contacting the suction surfaces of the plurality of types of suction nozzles can communicate with the suction holes of the suction nozzles in a state where the plurality of types of suction nozzles are in contact with the contact surfaces. A step of preparing a negative pressure tester including a plurality of detection holes that are opened in a state, and at least one negative pressure sensor that detects a negative pressure of the detection holes;

Each of the suction surfaces of the plurality of types of suction nozzles is brought into contact with each of the plurality of contact surfaces of the negative pressure tester, and a negative pressure is supplied to the negative pressure supply device. A negative pressure detecting step of causing the at least one negative pressure sensor to detect the negative pressure of each of the plurality of detection holes at a plurality of times during the process of increasing the negative pressure of each of the detection holes;

A determining step of determining, based on the negative pressure values at least at the plurality of times detected in the negative pressure detecting step, whether or not the holding component performance of the electronic circuit component holding device including the plurality of types of suction nozzles is good or bad;

A method for detecting component holding performance, comprising:

8. The determining step includes: setting a standard negative pressure value at each of the plurality of times preset for each of the plurality of types of suction nozzles; and a negative pressure value at the plurality of times detected in the negative pressure detecting step. 8. The component holding performance inspection method according to claim 7, comprising a comparison step of performing a comparison, wherein the step of determining whether the component holding performance is good or not based on the comparison result in the comparison step.

9. One negative pressure sensor common to the plurality of detection holes is used as the at least one negative pressure sensor, and the one negative pressure sensor is selectively communicated with each of the plurality of detection holes. 9. The component holding performance according to claim 7, wherein each of the suction surfaces of the plurality of types of suction nozzles is brought into contact with a contact surface where a detection hole communicating with the negative pressure sensor is open. Inspection method.

10. A device for inspecting the component holding performance of an electronic circuit component holding device that sucks and holds an electronic circuit component by a suction nozzle based on a negative pressure supplied from a negative pressure supply device, and (a) the suction nozzle (B) a detection hole which is opened in a state in which the suction surface is in contact with the suction surface of the suction nozzle when the suction nozzle is in contact with the suction surface of the suction nozzle; A component holding performance inspection device comprising a negative pressure inspection device having a negative pressure sensor for detecting pressure.

11. (a) The suction surface of the suction nozzle is brought into contact with the contact surface of the negative pressure tester, and a negative pressure is supplied to the negative pressure supply device. A negative pressure detection control unit for causing the negative pressure sensor to detect the negative pressure of the detection hole at a plurality of points in the process of increasing the negative pressure; and (b) detecting the negative pressure by the negative pressure sensor under control of the negative pressure detection control unit. 10. The component holding device according to claim 10, further comprising: a main control device including: a determination unit that determines whether the performance of the holding component of the electronic circuit component holding device is good or not based on the negative pressure values at the plurality of times. Performance inspection device.

12. The component holding ability according to claim 11, wherein the plurality of time points is three or more time points.

13. The determination unit compares the negative pressure values of the detection holes at the plurality of times detected by the control of the negative pressure detection control unit with the preset standard negative pressure values at the plurality of times. The component holding performance detection device according to claim 11 or 12, further comprising a comparing unit for judging the quality of the component holding performance based on a comparison result by the comparing unit.

14. The first cause estimation in which the main control device estimates the cause of the deterioration of the component holding performance based on a difference in the detected negative pressure values at the plurality of time points from the standard negative pressure value corresponding thereto. 14. The component holding performance inspection device according to claim 13, comprising a part.

15. The negative pressure detection control unit controls the negative pressure sensor for a plurality of suction nozzles. The main controller detects the negative pressure, and the determination unit determines that the component holding performance of some of the plurality of suction nozzles is poor and the component holding performance of the other suction nozzles is poor. If determined to be good, the suction nozzles that were determined to have poor component holding performance were presumed to be defective, and component holding performance was determined to be poor for a number of suction nozzles greater than the number of some of the suction nozzles. In the case, the component according to any one of claims 11 to 14, which includes a second cause estimating unit that estimates that at least one of the negative pressure supply device and the negative pressure sensor is defective. Retention performance inspection device.

16. The negative pressure detection control unit causes the negative pressure sensor to detect the negative pressure for a plurality of types of suction nozzles having different inner diameters of the suction holes, and the determination unit includes: The quality of the holding component performance of the electronic circuit component holding device including the plurality of types of suction nozzles is determined based on the negative pressure values at the plurality of times detected for each of the plurality of types of suction nozzles. The component holding performance inspection device according to any one of paragraphs 11 to 15 of the item.

17. The determination unit sets the standard negative pressure values at the plurality of times preset for each of the plurality of types of suction nozzles and the negative pressures at the plurality of times detected for each of the plurality of types of suction nozzles. 17. The component holding performance detection device according to claim 16, further comprising a comparing unit that compares the pressure value with the pressure value, wherein the quality of the component holding performance is determined based on a result of the comparison by the comparing unit.

18. An electronic circuit component holding device that suctions and holds a plurality of types of electronic circuit components by means of a plurality of types of suction nozzles having suction holes having mutually different inner diameters based on the negative pressure supplied from the negative pressure supply device. An apparatus for inspecting component holding performance,

Inspection device body,

The plurality of detection holes are provided in the inspection device main body in accordance with the movement of the detection hole forming member. A detection passage provided selectively communicable with each of the

Wherein the inspection device main body, the detection hole forming member, the detection passage and the negative pressure sensor cooperate with a portion of the detection hole switching device attached to the inspection device main body to form a negative pressure inspection device. A component holding performance inspection device characterized by comprising.

19. The rotary detection wherein the detection hole forming member is rotatably attached to the inspection device main body around a rotation axis, and the plurality of detection holes are formed on a circumference centered on the rotation axis. The detection hole switching device, wherein the detection hole switching device includes a detection hole formation member rotating device that rotates a rotary detection hole formation member to a rotation position where each of the plurality of detection holes communicates with the detection passage. Item 18. A component holding performance inspection device according to Item 18.

20. The detection hole switching device,

A detecting hole forming member moving device for moving the detecting hole forming member by a driving force of a driving source provided outside a negative pressure detector provided with the inspection device main body, a detecting hole forming member, a detection passage, and a negative pressure sensor. When,

10. The component holding performance inspection device according to claim 18 or 19, comprising:

2 1. The detection hole switching device is

22. V at the time when the suction nozzle starts approaching the negative pressure tester, the time when the negative pressure supply device starts the negative pressure supply, and the time when the suction nozzle comes into contact with the negative pressure tester, Claims 10 to 21 include a negative pressure detection start control device that causes the negative pressure sensor to start detecting a negative pressure in the detection hole at a point in time that has a predetermined fixed relationship with respect to A component holding performance inspection device according to any one of the above items.

23. Contact and separate the suction surface of the suction nozzle with the contact surface of the negative pressure tester. A nozzle elevating device for raising and lowering

Negative pressure detection that causes the negative pressure sensor to start detecting the negative pressure of the detection hole at a time point having a predetermined relationship with the time point at which the negative pressure supply device starts supplying the negative pressure to the suction nozzle. With start controller

The component holding performance inspection according to any one of claims 10 to 21 including:

24. The detection hole switching device and the negative pressure detection start control device each include a driven member, and the component holding performance detection device is provided in common for the driven members, and both the driven members are provided. The component holding performance inspecting device according to claim 22 or 23, further comprising a driving device including a driving member that selectively drives the member.