JPH0576099U - Parts mounting device - Google Patents

Abstract

(57) [Summary] [Object] The present invention has an object to detect whether or not a foreign object is clogged in the tube of the suction nozzle. A nozzle clogging detection device (68) irradiates the inside of a tube (12B) of a suction nozzle (12) with light from one end, and the state of the tube is imaged from the other end by an image pickup device (70). It is detected whether or not foreign matter is clogged in the pipe (12A) of (12).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a component mounting device that suctions a chip component stored in a component supply device with a suction nozzle and mounts it on a printed board.

[0002]

[Prior Art]

 As a conventional technique of this kind, there is one disclosed in Japanese Patent Application Laid-Open No. 3-160794 filed previously by the present applicant.

However, when a suction nozzle picks up a component, foreign matter sometimes enters the nozzle tube and is clogged with the foreign matter, resulting in a reduction in the suction force of the component.

[0004]

[Problems to be solved by the device]

 Therefore, an object of the present invention is to enable detection of nozzle clogging.

[0005]

[Means for Solving the Problems]

 In view of this, the present invention is a component mounting apparatus that suctions chip components stored in a component supply device with a suction nozzle and mounts them on a printed circuit board by irradiating light into the tube from one end of the suction nozzle. A nozzle clogging detection device is provided which detects the clogging of foreign matter in the tube of the suction nozzle by imaging the state of the tube from the other end with an imaging device.

[0006]

[Action]

 With the above configuration, the nozzle clogging detection device irradiates the inside of the suction nozzle tube with light and detects the state of the tube from the other end with an imager to detect whether or not there is a foreign object inside the suction nozzle tube. To be done.

[0007]

【Example】

 Embodiments of the present invention will be described below.

In FIG. 2, (1) is an XY table that moves in the XY directions by the rotation of the X-axis motor (2) and the Y-axis motor (3), and is a print substrate on which the chip part (4) is mounted. A plate (5) is placed.

(6) is a component supply table, and a large number of component supply devices (7) for supplying the chip components (4) are arranged. Reference numeral (8) is a supply base driving motor, which rotates the ball screw (9) to engage the supply screw (9) with a nut (not shown) fixed to the supply base (6). 6) is guided by the linear guide (10) and moves. The installation positions of the component supply devices (7) on the component supply table (6) are given reel numbers, for example, in order from the right.

(11) is a rotating disk that rotates intermittently, and mounting heads (13) having four suction nozzles (12) are arranged at equal intervals on the outer edge of the rotating disk (11).

A fitting groove (12A) into which a nozzle rotation fitting portion (30) described later is fitted is provided on the suction nozzle (12). Further, there is provided a spring (86) which absorbs an overload applied to the component (4) when the component (4) is attached to the substrate (5) while being pressed against the substrate (5) in a sucked state.

Reference numeral (100) is an acrylic diffuser plate that is mounted over all the suction nozzles (12).

The suction nozzle (12) sucks the component (4) from the supply device (7) to take out the component (4), and the first stop position of the mounting head (13) is the suction station, which rotates at the suction station. The suction nozzle (12) located on the outermost side of the board (11) sucks a predetermined component (4) in the order shown by NC data (not shown).

The second position where the mounting head (13) stops next is the component presence / absence detection station, and the component presence / absence detection device (14) at the component presence / absence detection station causes the component to be attached to the suction nozzle (12). It is detected whether or not (4) is adsorbed.

As shown in FIG. 3, the component presence / absence detecting device (14) is a component when the light projected from the light projector (15) is blocked by the component (4) and is not received by the light receiver (16). Detect as present.

The third position at which the mounting head (13) is next stopped is the standing chip detection station, and the standing chip detection device (17) at the standing chip detection station is used to mount parts ( It is detected whether or not 4) is stood up and adsorbed.

When the component (4) is normally adsorbed on the nozzle (12) as shown by the dotted line in FIG. 4, the standing chip detection device (17) detects that the light emitted from the light projector (18) is emitted. When the light receiver (16) of the detection device (17) arranged to be received by the light receiver (19) does not receive the light by the component (4), as indicated by the solid line, It is detected that the component (4) is standing and adsorbed.

The fourth position where the mounting head (13) is next stopped is a recognition station, and the component (a) that the suction nozzle (12) sucks by a component recognition device (20) such as a camera at the recognition station ( The positional deviation of 4) is recognized.

The fifth position where the mounting head (13) next to the recognition station stops is the angle correction station, and the suction nozzle (12) has the first nozzle based on the recognition result by the recognition device (20). The rotational positioning device (21) rotates in the θ direction to correct the positional deviation of the rotation angle of the component (4). The first rotary positioning device (21) will be described below with reference to FIG.

Reference numeral (22) is a first nozzle rotation motor as a drive source for rotating the suction nozzle (12) by θ, and is fitted into the bearing body (27) through the coupling (26) on the output shaft (25). A nozzle rotating rod (29) described later is attached to the nozzle rotating body (28) so as to be vertically movable.

Reference numeral (29) is a nozzle rotation rod having a nozzle rotation fitting portion (30) at a lower end portion fitted in the nozzle rotation body (28), which is vertically long and provided in the nozzle rotation body (28). A pin (32) protruding from the hole (31) is provided. The fitting portion (30) for rotating the nozzle is formed so as to become narrower toward the lower end so as to fit with the fitted groove (12A). Further, the nozzle rotating rod (29) is provided with a locking portion (34) for locking a spring (33) as a cushion means with the bottom surface of the nozzle rotating body (28), and the locking portion (34). ), A swing lever (37) attached via a rod end (36) to a vertical movement lever (35) that is vertically moved by a cam as a drive source (not shown) is locked. As the rocking lever (37) is rocked up and down in accordance with the vertical movement of (35), the nozzle rotating rod (29) is moved vertically while being biased by the spring (33).

The seventh stop position next to the angle correction station is a mounting station, and the component (4) whose angle is corrected by the angle correction station is mounted on the board (5). At this time, the suction force of the suction nozzle (12) is stopped, and air is blown out to mount the component (4) on the substrate (5). After installation is complete, the nozzle (12) returns to atmospheric pressure.

The next stop position of the mounting station is a discharge station for discharging the component (4) which is determined to be not mounted by the recognition at the standing chip detection station or by the recognition at the recognition chip.

The next stop position of the discharge station is the nozzle clogging detection station for detecting by the nozzle clogging detection device (68) whether or not foreign matter has clogged the pipe (12B) of the nozzle (12).

The nozzle clogging detection device (68) emits light from a light source (69) from the lower surface of the nozzle (12) as shown in FIG. 1, and an imager such as a CCD camera provided above the nozzle (12). By capturing the image at (70), clogging in the tube (12B) is detected. The bolt (71) mounted in the fitted groove (12A) so that the nozzle (12) does not fall out of the head (13) is made of a transparent material so that light can pass therethrough. Further, the light source (69) and the image pickup device (70) may be installed at opposite positions, respectively.

The next stop position of the nozzle clogging detection station is a nozzle cleaning station for removing clogging of the clogged nozzle (12) by the cleaning device (83).

The cleaning device (83) is a suction pump (not shown) in a state in which the nozzle (12) is lowered to connect the pipe (12B) of the nozzle (12) and the suction pipe (84). Is driven to suck the foreign matter stuck in the nozzle (12). A filter (not shown) is detachably provided in the cleaning device (83) to prevent foreign matter from entering the pump body.

The next stop position of the nozzle cleaning station is a nozzle selection station that selects the suction nozzle (12) corresponding to the component (4) to be suctioned by the suction station, and is provided on the outer diameter portion of the suction head (13). A drive gear (45) as a nozzle selecting means by rotation of a drive gear servomotor (not shown) that is moved by a drive system (not shown) ), The desired suction nozzle (12) is selected.

The nozzle origin for aligning the origin by rotating the nozzle (12) by the second nozzle rotation positioning device (24) by the angle at which the next stop position of the nozzle selection station is corrected by the angle correction station. It is a registration station. The second nozzle rotation positioning device (24) has the same structure as the first nozzle rotation positioning device (21).

Hereinafter, the turntable (11) will be described with reference to FIG.

(50) is a hollow cylindrical shape that is suspended and fixed to the mount (52A) of the index unit (52) so as to surround the upper portion of the cylindrical portion (51) formed on the upper portion of the turntable (11). It is a cylindrical cam member for guiding the rotating disk. A cam (53) is formed around the entire circumference of the lower end of the cam member (50), and an upper end of each suction head (13) is formed by a spring (54) on the upper surface of the cam (53). The roller (55) as a sliding part provided on the shaft rotates while being pressed, and each suction head (13) moves up and down together with the rotating disk (11) in accordance with the shape of the cam (53). .. That is, a pair of guide rods (56) is erected on each suction head (13) so as to vertically pass through the rotary disc (11), and a roller (55) is provided at the upper end of the rod (56). A mounting member (57) rotatably provided is fixed. Therefore, each suction head (13) is movably supported on the turntable (11). By the downward movement of the suction head (13), the component (4) is sucked at the suction station and a plurality of components (4) are mounted at the mounting station when the component (4) is mounted on the board (5). The lowering stopper (81) provided on the main body base (80) of the component mounting apparatus is used to prevent the components other than the desired suction nozzle (12) from descending.

Reference numeral (58) is a hose as a connecting body that communicates with a vacuum pump (not shown). One end of each hose (58) is connected to the pipe (12B) through the intake pipe (12C) of each nozzle (12), and the other end penetrates the turntable (11) and is embedded in the connecting ho. The connection hose (59) is connected to the vacuum pump through a switching valve (60), a lateral intake passage (61), and a central intake passage (62).

Reference numeral (63) is a suction type suction clutch solenoid for restricting the lowering of the suction head (13) at the suction station and stopping the suction operation when necessary, and the suction is performed by driving the cam mechanism (64). The head up-and-down moving lever (65) has an abutment lever (66) that abuts against the lever (65) so as not to be lowered. That is, when the clutch solenoid (63) is demagnetized, the contact lever (66) contacts the vertical movement lever (65) so that the vertical movement lever (65) cannot be lowered. The same structure is also provided in the mounting station.

The operation will be described below.

First, the component supply base (6) is moved to the suction station by the drive of the supply base drive motor (8), and the component supply device (7) storing the desired component (4) at the component suction position is on standby. It Then, the suction nozzle (12) is moved above the component (4) housed in the standby component supply device (7) and suction-holds the component (4) at the lower end of the suction nozzle (12). .. At the station, the lower end of the suction nozzle (12) of the suction head (13) must be lowered to the position of the component (4) housed in the component supply device (7), which is the cam (50) of the cam member (50). The roller (55) at the upper end of the head (13) is placed on a vertically movable upper and lower rail (not shown) disposed at a discontinuous portion of 53), and the upper and lower rails are lowered to move the roller. Be seen.

Next, the operation of detecting the presence / absence of the component (4) in the component presence / absence detection station will be described.

The suction nozzle (12) that has sucked the component (4) by the rotation of the turntable (11) passes between the light projector (15) and the light receiver (16) of the component presence / absence detection device (14). At this time, if the component (4) is adsorbed by the adsorption nozzle (12), the light from the projector (15) is blocked by the component (4) and is not received by the light receiver (16). It is detected that (4) is adsorbed by the nozzle (12).

Next, in the standing chip detection station, the standing chip detection device (17) detects whether or not the component (4) is adsorbed while standing on the suction nozzle (12).

When the component (4) is normally sucked, the state of the component (4) sucked by the nozzle (12) is recognized by the component recognition device (20) at the next recognition station.

Then, based on the recognition result, the nozzle (12) is corrected and rotated by the first nozzle rotation positioning device (21) at the next angle correction station, so that the angle of the component (4) is corrected.

Next, at the mounting station, the nozzle (12) is lowered onto the substrate (5) that has been held at a predetermined position by the XY movement of the XY table (1), the suction force is stopped, and air is released. The component (4) is mounted by being blown out. At this time, when the nozzle (12) is lowered and the component (4) is mounted on the substrate (5), the spring (86) absorbs an overload applied to the component (4). In addition, the nozzle (12) sucking the component (4) which is determined to be not adsorbed as a result of recognition at the recognition station at the standing chip detection station is not lowered, and Eject parts (4) at the ejection station. At this time, the suction force of the nozzle (12) is stopped and the air is blown out, so that the component (4) is reliably discharged.

In the next nozzle clogging detection station, it is detected by the nozzle clogging detection device (68) whether foreign matter is clogged in the pipe (12 B) of the nozzle (12). Immediately, light from the light source (69) is emitted from the lower end of the nozzle (12), and the light passes through the inside of the tube (12B) and is correctly imaged by the imager (70) installed above the nozzle (12). If it is not blocked, it is detected. At this time, in the next nozzle cleaning station, the clogging detection station detects that there is no clogging, so the nozzle (12) is not lowered but is passed through as it is.

Here, when the nozzle clogging detection station described above detects clogging, the clogging of the nozzle (12) is cleaned by the cleaning device (83) at the next nozzle cleaning station. That is, the nozzle (12) is lowered and the suction pipe (84) of the cleaning device (83) installed below the nozzle (12) and the pipe (12B) of the nozzle (12) are in contact with each other and connected. Then, the vacuum pump is driven to suck the foreign matter in the nozzle (12).

It should be noted that the cleaning device (83) side may be raised instead of lowering the nozzle (12) during this cleaning. Further, cleaning may be performed every time without providing a detection station, cleaning may be performed by providing a timer after a certain time has passed, and a counter may be provided to count the number of boards (5) on which components have been mounted. It may be counted and cleaned when a predetermined number is reached. Similarly, the number of parts (4) mounted on the counter may be counted, and cleaning may be performed when the predetermined number of points is reached. Furthermore, a plurality of nozzles (12) may be cleaned at the same time, or all the nozzles (12) mounted on the mounting head (13) may be cleaned at once.

Similarly, the nozzle clogging detection timing may be set such that the clogging detection operation is performed every time, or a clog detection operation may be performed by providing a timer after a certain period of operation time has elapsed, and a counter may be provided for component mounting. The number of completed substrates (5) may be counted, and the detection operation may be performed when the number of substrates reaches a predetermined number. Further, similarly, the number of the mounted component (4) may be counted by the counter, and cleaning may be performed when the predetermined number is reached. Further, a plurality of nozzles (12) may be cleaned at the same time, and all the nozzles (12) mounted on the mounting head (13) may be detected to be clogged at once. The timer and counter may be shared when detecting nozzle clogging and when cleaning nozzles.

The clogging of the nozzle (12) may be detected by the component recognition device (20). In this case, the clogging in the nozzle (12) is recognized by irradiating the suction nozzle (12) in a state where the component (4) is not sucked with light from above.

Further, when applied to the component mounting apparatus having no cleaning device (83), if the nozzle clogging detection station detects that there is clogging, only the nozzle (12) is skipped without performing the suction operation thereafter. The operator is informed by an alarm device while continuing the operation. Further, the device may be automatically stopped. Then, the worker inspects and cleans.

In addition, as long as it can freely move in the plane direction like an XY robot type, a nozzle is used to perform a nozzle clogging detection operation and a cleaning operation at predetermined time intervals, and a counter is used to mount a component. It is also possible to count the number of completed substrates (5) and carry out every predetermined number of substrates. Further, similarly, the number of the mounted component (4) may be counted by the counter, and cleaning may be performed when the predetermined number is reached.

In the next nozzle selection station, a selection operation for a desired nozzle (12) is performed according to the component (4) to be sucked when the head (13) at this position moves to the suction station.

Then, the origin alignment operation of the selected nozzle (12) is performed at the nozzle origin alignment station.

[0051]

[Effect of the device]

 As described above, according to the present invention, clogging in the suction nozzle can be detected.

[Brief description of drawings]

FIG. 1 is a diagram showing a nozzle clogging detection device.

FIG. 2 is a plan view of a component mounting device.

FIG. 3 is a side view of a component presence / absence detection device.

FIG. 4 is a side view of the standing chip detection device.

FIG. 5 is a perspective view showing a first nozzle rotation positioning device.

FIG. 6 is a cross-sectional view of a main part of a turntable.

FIG. 7 is a diagram showing a cleaning device. (1) XY table (4) Chip parts (11) Rotating plate (12) Suction nozzle (68) Nozzle clogging detection device (83) Cleaning device

Claims (1)

[Scope of utility model registration request] 1. A component mounting device for adsorbing a chip component housed in a component supply device with a suction nozzle and mounting the chip component on a printed circuit board by irradiating light into the pipe from one end of the suction nozzle. And a nozzle clogging detection device for detecting clogging of foreign matter in a tube of the suction nozzle by imaging the above state from the other end with an image pickup device.