JPH0680947B2 - Positioning device for electronic components - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component position regulating device used when mounting a minute electronic component to an electronic circuit board.

Conventional configuration and its problems Conventionally, when mounting a leadless type microelectronic component typified by a chip-type resistor and a chip-type multilayer capacitor on an electronic circuit board, an adhesive is applied to the necessary parts of the circuit board. In addition, a method of sequentially supplying and adhering electronic components to a circuit board is adopted. The circuit board to which the electronic components are adhered is electrically connected by solder dipping.

In this way, as an apparatus for mounting electronic components, a large number of suction nozzles are provided on an index rotary component mounting head,
It is proposed that these suction nozzles sequentially suck electronic components at a component receiving position, convey the electronic components to a component mounting position, and mount them on a circuit board.

Since positional accuracy is required for mounting the electronic component, the electronic component is positioned with respect to the suction nozzle by being sandwiched by the setting claws after being sucked by the suction nozzle. The train wheel setting claw is provided at the nozzle stop position, and the position setting is performed while the rotation of the component mounting head is stopped. However, if the closing speed of the train wheel is fast, the electronic parts may be cracked or chipped, and if the closing speed is slow, the down time of the parts supply head will be long and the production speed will be reduced. There's a problem.

It is an object of the present invention to provide a position regulating device for an electronic component, which can perform the position regulating without damaging the electronic component and can improve the transport tact.

Configuration of the Invention The position regulating and conveying device for an electronic component of the present invention includes a suction nozzle that sucks an electronic component, a transfer unit that mounts the suction nozzle on a moving member and transfers a fixed path, and a suction unit that is mounted on the moving member. An openable and closable setting claw that sandwiches the electronic component sucked by the suction nozzle, a claw opening and closing member that is attached to the moving member so as to be able to move forward and backward, and the claw opening and closing member is opened and closed by forward and backward movement of the claw opening and closing member. A link mechanism, a spring for urging the train wheel setting claw in a closing direction, and a fixed cam provided along the fixed path for engaging the claw opening / closing member and closing the train wheel setting claw with the movement of the moving member. It is equipped with.

According to the configuration of the present invention, since the moving member to which the suction nozzle is attached is provided with the setting claw, and the fixed cam for opening and closing the setting claw and the fixed path of the suction nozzle are provided, the opening and closing of the setting claw can be performed during the movement of the suction nozzle. I can do it. Therefore, even if the closing speed of the train wheel setting claw is slow, the transfer stop time of the suction nozzle does not become long, and the transport tact can be improved.

In addition, the spring for urging in the closing direction limits the sudden closing of the train wheel setting claw by the fixed cam and closes it with the transfer of the suction nozzle, so that it can be closed gently. Therefore, the position can be adjusted without causing chipping or cracking of the electronic component.

Description of Embodiments One embodiment in which the present invention is applied to an electronic component mounting apparatus is shown in FIGS. 1 to 11. In FIGS. 1 to 3, 1 is a base, an XY table 4 for mounting two circuit boards 2 and 2'on the left and right sides of the figure is installed in the front part, and on the right circuit board 2 '. An adhesive applying device 5 for applying an adhesive to the component and a component mounting head 6 for mounting the electronic component 8 on the left side circuit board 2 are arranged in parallel. A component supply rotor 7 is installed behind the component mounting head 6. In the component suction head 6, ten chucks 9 for holding the electronic components 8 are equally arranged in the same direction, and intermittently rotate around the vertical axis at the arrangement pitch of the chucks 9. Head frame 29 of base 1
Further, an upper drive unit 50 for driving each unit and a head drive cam unit 51 are provided.

The chuck 9 has a setting claw integrated with the suction nozzle as described later, and the component mounting head 6 serves as a transfer device for the suction nozzle.

The adhesive application device 5 is for applying an adhesive onto the circuit board 2'with a nozzle that moves up and down as shown in FIG. 300 is an adhesive application part.

The XY table 4 moves left and right (X axis direction) and front and rear (Y axis direction), and is installed on the front and rear guide rails 15 and moves in the front and rear direction (Y axis direction) Y table 4a (fourth table).
And the horizontal guide rail 16 on the Y table 4a (first
X table 4b which is installed in the figure and moves in the lateral direction (X-axis direction). The Y table 4a and the X table 4b are driven by pulse motors 17 and 18 and a feed screw mechanism (not shown), respectively. On both sides of the XY table 4, a carry-in guide rail 19 and a carry-out guide rail 20 for the circuit boards 2 and 2'are installed.

The component supply rotor 7 is rotatably provided around a vertical axis 21 and has a large number of component supply cassettes 22 detachably attached to the outer peripheral portion thereof. The component supply cassette 22 is a component holding tape 23 (FIG. 6) that holds the electronic components 8 in a row and is wound around a reel to be stored. The component holding tape 23 is intermittently provided in the take-out portion 22a at each component arrangement pitch. It is configured so as to extend to the target. Each component supply cassette 22 is prepared to accommodate different types of electronic components 8.

Each chuck 9 of the component mounting head 6 is, as shown in FIG.
The suction nozzle (13) and a pair of train wheel setting claws (14).
The train wheel setting claw 14 serves to carry out position calibration in one direction (X-axis direction) of the electronic component 8 sucked by the suction nozzle 13, and position regulation in a direction (Y-axis direction) orthogonal to this is performed on the base 1. This is performed by the pair of train wheel setting claws 106 of the installed part position trainer 10.

Ten chuck stop positions S _{1 to} S _{10 of the} component mounting head 6
S ₁ is the part receiving position, S ₃ is the part setting position in the Y-axis direction, S ₄ is the part detecting position, S ₅ is the chuck rotation position, and S _{6 is}
Is the component mounting position, S ₇ is the chuck rotation return position, and S ₈ is the defective component ejection position. Further, the rotation section from S ₁ to S ₂ is the part regulation section in the X-axis direction. A component position regulating device 10 is arranged at the component regulating position S ₃ , and a component detecting device 11 is arranged at the component detecting device S ₄ . A chuck rotating device 12 and a chuck returning rotating device 12 'are installed at the chuck rotating position S ₅ and the chuck returning rotating position S ₇ , respectively. The bad parts discharge position S ₈ parts receiving box 19
There is a six. 103 is a fixed cam for opening and closing the chuck.

As shown in FIGS. 4 and 6, the component mounting head 6 has a chuck mounting shaft 26 mounted on the outer periphery of a rotary frame 24 via a slide bearing 25 so as to be vertically movable and rotatable. The slide bearing 25 has a bearing metal 25a. The chuck mounting shaft 26 serves as a moving member, and the chuck 9 is provided at the lower end of the chuck mounting shaft 26. The rotary frame 24 is fixed to the rotary main shaft 27 via a clamp element 28 with a nut 28 '. The rotary main shaft 27 is rotatably supported by a bearing 31 in a cylindrical main shaft housing 30 provided on the lower surface of the head frame 29 of the base 1.

As shown in FIG. 7, the chuck mounting shaft 26 has a sleeve on the upper end.
A vertical drive block 34, a chuck transmission gear 35, and a rotation lock member 75 are attached via 33. The chuck transmission gear 35 is the chuck drive gear of the chuck rotating device 12.
It engages 36. The weight of the chuck mounting shaft 26 is
Chuck mounting shaft lifting spring via block 34 for vertical drive
Supported by 39. Chuck mounting shaft lifting spring 39
Are housed in a cylindrical detent and spring retaining shaft 40. The rotation preventing and spring holding shaft 40 is fitted in a guide hole 41 formed in the slide bearing 25 of the chuck mounting shaft 26 so as to be able to move up and down.

A cam follower 42 is rotatably attached to the vertical drive block 34, and a vertical drive groove 43 is formed. The cam follower 42 is engaged with a groove-shaped chuck up / down fixed cam 44 provided over the entire circumference of the fixed cam cylinder 3 on the outer circumference of the main shaft housing 30 (FIG. 6). Chuck up / down fixed cam 44
Is to keep the chuck height appropriate for each device such as the component position restricting device 10 and the component detecting device 11 arranged at each chuck stop position S _{1 to} S ₁₀ , and the developed state is shown in FIG. The same as the cam curve 46 shown in FIG. The chuck up / down fixed cam 44 is not necessary when the components such as the component position regulating device 10 are arranged at a constant height. The vertical drive groove 43 of the vertical drive block 34 is engaged with the engaging cam lever 47 (FIG. 6) provided at the component receiving position S and the component mounting position S ₆ and the engaging rollers 47a, 48a of the mounting cam lever 48. To do. Cam follower 42
Is fitted in a guide hole 241 provided in the sliding guide 240 along the up-down direction, and is steady by the guide hole 241. The sliding guide 240 has a cylindrical shape fitted to the outer periphery of the fixed cam cylinder 3 and fixed to the rotary frame 24, and the guide hole 241 is provided for each chuck mounting shaft 26. The suction cam lever 47 and the mounting cam lever 48 are driven by a suction cam 55 (FIG. 8) and a mounting cam 56 built in the head drive cam unit 50, respectively. The suction cam lever 47 and the mounting cam lever 48 are pressed against the suction cam 55 and the mounting cam 56 by the cam pressing springs 57 and 58, respectively, and can be separated from the cam surface by the stopper cylinders 59 and 60. .

The structure of the chuck 9 will be described. As shown in FIG. 7, the suction nozzle 13 is inserted into the nozzle mounting hole of the chuck mounting shaft 26 so as to be capable of projecting and retracting, and is biased to project by the spring 87. Retract according to the height of. Reference numeral 88 is a rotation stopping and stopping pin for the suction nozzle 13. The suction nozzle 13 communicates with a suction passage 89 in the chuck mounting shaft 26, and a pipe connecting portion 90 is formed at the upper end of the chuck mounting shaft 26. The train wheel setting claw 14 is mounted on the train wheel setting unit body 91 by a claw opening / closing fulcrum 92.
It is connected so as to be openable and closable around it, and a component contact member 93 is attached to the tip end with a fastening screw 94. Main body 91
Is fitted on the chuck mounting shaft 26 so as to be vertically movable. Nail claw open / close ring that serves as a claw open / close member on the outer circumference of the train wheel setting body 91
The 95 is fitted vertically so that it can move freely. The claw opening / closing ring 95 is a connecting point 201 of the two links 200 connected to the respective setting claws 14 to each other.
Is connected, and the train wheel setting pawl 14 can be opened and closed by moving the train wheel setting portion main body 91 up and down relatively. A cam follower 96 is rotatably attached to the pawl opening / closing ring 95. The train wheel setting portion main body 91 is urged downward by a compression spring 98 supported by a spring holding collar 97 on the chuck mounting shaft 26, and its lower end is engaged with a stopper flange 99 of the chuck mounting shaft 26. The spring holding collar 10 is externally fitted to the upper end of the train wheel setting portion body 91 and stopped by the nut 101, and the pawl opening / closing ring 95 is pushed down by the pawl opening / closing spring 102 provided between the spring holding collar 100 and the spring holding collar 100. The train wheel setting portion main body 91 is in contact with the upward step surface 91a. The compression spring 98 has a larger spring constant than the pawl opening / closing spring 102. The cam follower 96 is transferred to the upper surface of the chuck opening / closing fixed cam 103. The chuck opening / closing fixed cam 103 is partially provided on the outer circumference of the spindle housing 30. The circumferential range in which the chuck opening / closing fixed cam 103 is provided is, as shown in FIGS. 5 and 8, a stop position S ₁₀
A portion 103a from the front to the stop position S ₂ and a portion 103b from the mounting position S ₆ to the component ejection position S ₈ . The part 103a is
The cam curve is such that the train wheel setting claw 14 of the chuck 9 is gently closed. The cam curves of the portions 103a and 103b are designed according to the cam curve 46 of the chuck up / down fixed cam 44. In this embodiment, since the chuck up / down fixed cam 44 has an ascending curve between the positions S ₁ and S ₂ , the cam curve of the portion 103a is horizontal.

As shown in FIG. 9, the component position regulating device 10 has a guide shaft 105.
A pair of train wheel setting claws 106 that slide along is provided, and these train wheel setting claws 106 are moved forward and backward by a link mechanism 107 so as to face each other. Reference numeral 108 is the main body of the train control apparatus. The opening / closing direction of the train wheel setting claw 106 is the radial direction of the component mounting head 6 and is a direction orthogonal to the opening / closing direction of the train wheel setting claw 14 on the chuck 9 side at the chuck origin rotation angle. The link mechanism 107 is driven by the connecting rod 109, the rotating lever 110, the connecting rod 111,
This is performed by rotation of the train wheel setting cam 114 via the train wheel setting cam lever 113 rotatable about the fulcrum 112. The train wheel setting cam lever 113 is mounted on the train wheel setting cam 11 by the cam surface pressing cylinder 115.
Pressed on 4.

As shown in FIG. 6, the chuck rotating device 12 mounts a chuck drive gear 36, which meshes with the chuck transmission gear 35 of the chuck mounting shaft 26, at the tip of the rotary lever 63, and the chuck drive gear 36 is driven by the pulse motor 68. It is driven by a belt.
By rotating the rotating lever 63 with the cam lever 81,
The chuck drive gear 36 disengages from the chuck transmission gear 35.

The chuck return rotation device 12 ′ has the same structure as the chuck rotation device 12.

The component detecting device 11 (FIG. 5) detects whether or not the electronic component 8 sucked by the suction nozzle 13 is within a certain height range by the light source and the line sensor which are opposed to each other, and thereby the electronic component 8 is detected.
Is used to correct whether or not it is adsorbed by the adsorption nozzle 13.

The suction nozzle 13 is capable of blowing compressed air by switching the switching valve 120 (FIG. 4).

The operation of the above configuration will be described. In brief, the circuit board 2'on the right side of FIG. 1 on the XY table 4 has been newly carried in, and the adhesive is applied by the adhesive applying device 5. The left side circuit board 2 on the XY table 4 is the one that has been applied with adhesive by the adhesive applying device 5 and slid on the XY table 4, and parts are attached to the respective parts with adhesive applied. The electronic component 8 is mounted on the head 6. Adhesive application and component mounting are performed in synchronization.

The component mounting operation will be described. As shown in FIG. 8, at the component receiving position S ₁ , the chuck mounting shaft 26 descends to move the component cassette.
The electronic component 8 on 22 is sucked by the suction nozzle 13. At this time, the chuck mounting shaft 26 is lowered by pushing down the suction cam lever 47. When the chuck mounting shaft 26 begins to descend, the compression spring 98 (FIG. 7) is stronger than the pawl opening / closing spring 102, so that the train wheel setting unit body 91 moves down together with the chuck mounting shaft 26 while compressing the pawl opening / closing spring 102. . In addition, the pawl opening / closing ring 95 is a fixed cam 10 for pawl opening / closing with a cam follower 96.
It is engaged with 3 and is held at a constant height. Therefore, the train wheel setting claw 14 linked to the claw opening / closing ring 95 by the link 200 is used.
Opens. After that, when the chuck mounting shaft 26 is lowered and the spring holding collar 100 hits the pawl opening / closing ring 95, the train wheel setting body 9
1 cannot descend, and only the chuck mounting shaft 26 continues to descend while compressing the pressing spring 98. Therefore, the suction nozzle 13 at the lower end of the chuck mounting shaft 26 projects downward from the setting claw 14. In this way, the electronic component 8 is sucked by the suction nozzle 13.
Adsorb.

When the suction is performed, the suction cam lever 47 rises, the chuck mounting shaft 26 rises, and the component supply head 6 rotates by one pitch. When the chuck mounting shaft 26 returns to the raised position, the train wheel setting claw 14 is closed to some extent, but the claw opening / closing ring 95 is still slightly lifted by the claw opening / closing fixed cam 103, and the train wheel setting claw 14 is not completely closed. Absent. Then, when the component supply head 6 rotates, the chuck mounting shaft 26 causes the chuck upper and lower fixed cams engaged with the cam followers 42 at the upper ends thereof.
Along 44, there is a gradual increase as indicated by the cam curve 46 in FIG. Therefore, the pawl opening / closing ring 95 is lowered relative to the chuck mounting shaft 26, and the train wheel setting pawl 14 is gradually closed. In this way, the train wheel setting claw 14 is gently closed to close the electronic component 8
Then, the position of the suction nozzle 13 is adjusted. That is, the suction nozzle 13 is centered in one direction.

The component supply head 6 rotates further, and the chuck mounting shaft 26
When reaches the part setting position S ₃ , the setting claw 106 of the part position restricting device 10 is closed, and position adjustment is performed in a direction orthogonal to the direction by the setting claw 14 on the chuck 9 side. In this way, the electronic component 8 is aligned in two orthogonal directions. At this time, the electronic component 8 does not move up and down the chuck 9,
By the rotation of the component supply head 6, as shown in FIG. 11, it enters into and out of the fixed side setting claws 106. Therefore, as compared with the conventional one in which the suction head is moved up and down at the position of the component regulating device, the time for raising and lowering the suction head can be shortened.

The component detection device S ₄ detects whether or not the suction nozzle 13 is held in a proper state. If it is not properly held, the fact is stored and the defective part is ejected at the subsequent defective component ejection position.

At the component rotation position S ₅ , the rotation lever of the chuck rotation device 12 is
Rotate 63 to move the chuck drive gear 36 to the chuck mounting shaft.
It is engaged with the chuck transmission gear 35 of 26, and the pulse motor 68
The chuck mounting shaft 26 is rotated by. As a result, the angle θ of the electronic component 8 with respect to the circuit board 2 is regulated to an arbitrary angle.

When the component mounting device S ₆ is reached, the mounting cam lever 48 pushes down the chuck mounting shaft 26, and the train wheel setting claw 14 is opened as in the case of the suction position. The electronic component 8 is a suction nozzle.
It is pressed onto the circuit board 2 at 13, and is bonded with the adhesive on the circuit board 2. At this time, compressed air is blown out from the suction nozzle 13, and it is prevented that the electronic component 8 remains attached to the suction nozzle 13 and becomes defective in mounting. Parts detection position
If it is determined in S ₄ that the suction is defective, the chuck mounting shaft 26 is not lowered and the electronic component is not mounted.

At the chuck return rotation position S ₇ , the chuck mounting shaft 26 is rotated in the opposite direction by the angle θ rotated at the chuck rotation position S ₅ .

At the defective component take-out position S ₈ , the electronic component 8 not mounted at the suction position S ₆ due to defective suction is discharged to the component receiving box 196. In addition, from the chuck return rotation position S ₇ to the component discharge position S ₈
During the time, the fixed cam 103 for opening and closing the setting claw has a curve that gradually rises with a greater gradient than the fixed cam 44 for chuck upper and lower, and the claw open / close ring 95 of the chuck mounting shaft 26 is gradually raised. Therefore, the train wheel 14 is opened.

In this way, the electronic component 8 is mounted, but the setting claw 14 on the chuck 9 side is gently closed with the rotation of the component mounting head 6 by the setting of the fixed cam 103 for opening and closing the claw.
Therefore, the electronic component 8 is not damaged such as cracked or chipped. Further, although it closes gently like this, since it closes during the rotation time of the component mounting head 6, there is no need to prolong the stop time of the component mounting head 6 for opening and closing the nails.
The tact can be improved.

Although the suction nozzle 13 is mounted on the rotating component mounting head 6 in the above embodiment, the present invention can be applied to the case where the suction nozzle 13 is moved along an elliptical path or other various curved paths. it can. The present invention can be applied not only when the electronic component 8 is mounted on the circuit board 2 but also when the electronic component 8 is simply transported. Further, four regulating claws may be provided on the suction nozzle 13 side to perform position regulation in two directions during the transfer of the suction nozzle 13.

EFFECTS OF THE INVENTION Since the moving member to which the suction nozzle of the present invention is attached has the setting claw, and the fixed cam for opening and closing the setting claw and the suction nozzle are provided in a fixed path, the setting claw can be opened and closed while the suction nozzle is moving. . Therefore, even if the closing speed of the train wheel setting claw is slow, the suction nozzle transfer stop time does not become long,
The transport tact can be improved.

In addition, the spring for urging in the closing direction limits the sudden closing of the train wheel setting claw by the fixed cam and closes it with the transfer of the suction nozzle, so that it can be closed gently. Therefore, there is an effect that the position regulation can be performed without causing a chip or a crack in the electronic component.

[Brief description of drawings]

1 is a schematic plan view of an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, FIG. 4 is a perspective view of a component mounting head thereof, and FIG. A schematic plan view thereof, FIG. 6 is a longitudinal sectional view of the component mounting head, FIG. 7 is a sectional view of the chuck mounting shaft and chuck, and FIG. 8 is an operation explanation of the component mounting head in a developed state. FIG. 9 is a cutaway front view of the component position regulating device, FIG. 10 is a partial plan view of the same circuit board, and FIG. 11 is an operation explanatory diagram thereof. 1 ... Base, 2 ... Circuit board, 4 ... XY table, 5 ...
... Adhesive coating device, 6 ... Component mounting head (transfer device), 8 ... Electronic components, 9 ... Chuck, 10 ... Component position regulating device, 11 ... Component detecting device, 12 ... Chuck rotating device, 12 '…… Chuck return rotation device, 13 …… Suction nozzle, 14 …… Regulating jaw, 26 …… Chuck mounting shaft (transfer member), 95 …… Pawl opening / closing ring, 102 …… Pawl opening / closing spring, 103
...... Fixed cam for opening and closing the claw

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenji Fukumoto Kenji Fukumoto 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References: 58-55881 (JP, U) 58-46476 (JP, U)

Claims (1)

[Claims] 1. A suction nozzle for sucking an electronic component, a transfer device for mounting the suction nozzle on a moving member to transport a fixed path, and an electronic component mounted on the moving member and sucked by the suction nozzle. Openable and closable train wheel setting claw, claw opening and closing member attached to the moving member so as to be able to move forward and backward, a link mechanism for opening and closing the train wheel setting claw by forward and backward movement of the claw opening and closing member, and a direction for closing the train wheel setting claw. A position adjusting device for an electronic component, comprising: a spring biased to a fixed path; and a fixed cam that is provided along the fixed path and that engages with the claw opening / closing member and closes the train wheel setting claw with the movement of the moving member.