JPH0777310B2 - Mounting head operation mechanism of component mounting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mounting head operating mechanism of a component mounting machine used for mounting chip-shaped electronic components on a printed circuit board, and more particularly to a mounting head operating mechanism. The present invention relates to a mounting head operating mechanism of a component mounting machine capable of shortening the stop period of the index table and increasing the speed.

(Summary of the Invention) The present invention is a mounting head operating mechanism of a component mounting machine used for mounting a chip-shaped electronic component on a printed circuit board, and is mounted on a movable table that moves in synchronization with intermittent rotation of an index table. By providing a means for performing a swinging operation of the head, the stop time of the index table can be shortened and the speed can be increased, which in turn makes it possible to improve the mounting efficiency of parts.

(Prior Art) Conventionally, in Japanese Patent Laid-Open No. 61-77399 proposed by the present applicant, a plurality of mounting heads each having one suction pin are arranged at an equal angular interval on an index table, and the index table is provided with a center of rotation. Chip-shaped electronic components are suction-held by suction pins from a plurality of supply units that are arranged in parallel radially toward each other, and the components are transferred onto the printed circuit board according to the intermittent rotation of the index table. A sequence type component mounting machine for performing suction on a printed circuit board is disclosed.

Further, as a component mounting machine for rotating the mounting head from the outside of the index table, a structure shown in Japanese Patent Laid-Open No. 62-30399 is known.

(Problems to be Solved by the Invention) When a large number of mounting heads are arranged on the index table, a mechanism or the like for rotating or swinging the mounting heads is provided on the index table in correspondence with each mounting head. Then, the configuration becomes very complicated and expensive, and it becomes difficult to secure a space for arranging those mechanisms on the index table.

There is also a configuration in which a mechanism for rotating or swinging the mounting head is fixedly arranged outside the index table. In this case, it is advantageous in terms of simplification of the mechanism, but the index table stops at a predetermined position. The rotation or swing operation of the mounting head has to be completed during the period during which the index table is stopped. Further, if the mounting head that has adsorbed the components is suddenly rotated or the like, it may fall off or be displaced. If the stop period of the index table cannot be shortened, there is a limit to improving the efficiency of mounting electronic parts on the printed circuit board.

In view of the above points, the present invention provides a mounting table operating means for operating the mounting head on a movable table that moves in synchronization with an index table provided with a plurality of mounting heads, thereby reducing the stop period of the index table. An object of the present invention is to provide a mounting head operating mechanism of a component mounting machine which is shortened to improve component mounting efficiency.

(Means for Solving the Problem) According to the present invention, a plurality of mounting heads are provided at equal angular intervals on the peripheral edge of an index table that rotates intermittently, and each mounting head is provided with a suction pin for sucking a component. In a mounting head operating mechanism of a component mounting machine that operates a mounting head from the outside of the index table, a moving table that is arranged along the index table and that moves forward and backward along an intermittent rotation and a concentric arc movement locus of the index table. Mounting head operating means is provided, and the mounting head operating means provides a period during which the movable table moves forward while maintaining a constant position with the index table in synchronization with intermittent rotation of the index table, and a part of a stop period. The feature is that the mounting head can be operated.

(Operation) In the mounting head operation mechanism of the component mounting machine of the present invention,
Since the mounting head operating means for operating the mounting head is provided on the movable table which moves in synchronization with the intermittent rotation of the index table, a part of the stop period of the index table and the following moving period of the index table and the next The total period including a part of the stop period can be used for various operations of the mounting head, the stop period of the index table can be shortened, and the component mounting speed can be improved.

(Embodiment) An embodiment of a mounting head operating mechanism of a component mounting machine according to the present invention will be described below with reference to the drawings.

First, the overall configuration of a component mounting machine to which the present invention is applied will be described with reference to FIG. In these figures, 1 is a base, 2 is an XY table installed on the base, and 3 is an X-
It is a printed circuit board on the Y table. A main body frame 4 is erected and fixed on the base 1, and a disc-shaped index table 5 is supported by the frame 4 so as to be intermittently rotatable in a horizontal plane. Reference numeral 6 is a drive mechanism for rotating the index table 5 intermittently. A plurality of mounting heads 7 are attached to the peripheral edge of the disk-shaped index table 5 so as to be swingable in a horizontal plane at equal angular intervals. Here, it is assumed that each mounting head 7 has three types of suction pins 9 of large diameter, medium diameter, and small diameter. A mounting head operating mechanism 10 is arranged along the outer circumference of the index table 5 for swinging the mounting head 7 at a predetermined position and rotating the suction pin from outside the index table 5.

FIG. 8 shows an example of the arrangement of the mounting head 7 equipped with suction pins 9A, 9B, 9C of large diameter, medium diameter and small diameter. The circumference of the index table 5 is divided into 72 and the mounting head is arranged at intervals of 5 degrees. 7 is provided. In this case, the circumference 72 of the index table 5
Station can be defined, and the first station S ₁ is a position where mounting of chip-shaped electronic components (capacitors, resistors, inductors, ICs, etc.) to a printed circuit board is performed. 20th to 59th stations S
₂₀ to S ₅₉ is the place to capture and suck the electronic component from the supply unit 8 supplies a chip-like electronic components.

19th station S ₁₉ thru 18th station S ₁₈
The section is a place where the mounting head operating mechanism 10 returns the mounting head 7 to the origin. This returning to the origin is an operation of swinging the mounting head 7 to set the suction pins (9A, 9B or 9C) that have sucked the electronic components so as to be located at the outermost circumferential position of the index table 5.

The section from the 17th station S _{17 to the} 16th station S ₁₆ is where the suction head (9A, 9B or 9C) is rotated by the mounting head operating mechanism 10. This direction turning is an operation for rotating the suction pin by 90 degrees, for example, to change the orientation of the chip-shaped electronic component held by the suction pin by 90 degrees.

Further, the section from the _14th station S _{14 to the} 13th station S ₁₃ is a place where the mounting head operating mechanism 10 performs the corrective rotation of the suction pin (9A, 9B or 9C). This correction turning is an operation for turning a small amount of the electronic component based on the result of image processing of the posture of the electronic component after the direction turning at the _16th station S ₁₆ .

The index table 5 in FIG. 8 is considered to intermittently rotate clockwise (direction of arrow F). Further, the arrangement of the large-diameter suction pins 9A, the medium-diameter suction pins 9B, and the small-diameter suction pins 9C in each mounting head 7 is equal to the equiangular intervals (90 degree intervals) eccentric with respect to the swing center of the mounting head 7. To do.

The mounting head operating mechanism 10 of the component mounting machine will be described in detail with reference to FIGS. 1 to 6. The support frame 11 fixed to the body frame 4 includes an arc-shaped slide rail.
12 is fixed, and a moving base 14 is fixed to a slider member 13 slidably attached to the slide rail 12. The moving locus of the moving table 14 is larger than the outer diameter of the index table 5 and is on a concentric arc.

A base portion 16 of a linear slide 15 is fixed at a plurality of locations on the moving base 14, and a slide lateral bar 18 is fixed on a slide portion 17 slidable with respect to the base portion 16. A perforated plate 35 is fixed to the slide horizontal bar 18,
An arcuate elongated hole 36 is formed in the arc 35 concentric with the outer peripheral surface of the index table 5. A swing arm fixed to the lower end of a swing drive shaft 37 pivotally supported on the body frame 4 side
A roller 39 is pivotally attached to the tip of 38, and the roller 39 is engaged with the inside of the slot 36. Therefore, the slide lateral bar 18 periodically repeats the forward movement (arrow J) toward the center of the index table 5 and the reverse movement (arrow K) in the opposite direction by swinging the swing arm 38 as shown by the arrow H.

A swinging operation means 32 as a first mounting head operating means for swinging the mounting head 7 is provided for the movable table 14. That is, the mounting head origin returning pulse motor 20 is fixed on the mounting plate integrated with the moving base 14, and the mounting head origin returning arm 22 is pivotally attached to the bracket 21 fixed to the moving base 14. . And arm 22
A mounting head origin returning gear 23 is pivotally attached to the tip of the. A pulley 24 is integrated with the gear 23. Third
As shown in the figure, a pulley 25 fixed to the rotary shaft of the pulse motor 20, a pulley 26 pivotally supported by an arm mounting pivot of the bracket 21, the pulley 24, and a pivotal attachment in the middle of the arm 22. The timing belt 28 is stretched between the pulley 27 and the rotation of the pulse motor 20.
It will be transmitted to 23. The slide horizontal bar
An air cylinder 29 for returning the mounting head to the origin is fixed to 18, and the rod tip member 30 of the air cylinder 29 is an arm.
Abuts 22. The mounting head origin return gear 23
Is the mounting head 7 located in the section of the _{19th to 18th} stations S _{19 to} S ₁₈ when the slide lateral bar 18 is in the forward position and the tip member 30 of the air cylinder 29 is in the extended state. It is adapted to mesh with the gear 40 integrated on the outer periphery of the.

The suction pins (9A, 9B, 9C) that the mounting head 7 is rotatably provided with have wear wheels 41 at the top.

A direction turning operation means 33 as a second mounting head operation means for turning the suction pin included in the mounting head in the direction is arranged on the movable table 14. That is, the suction pin direction turning pulse motor 50 is fixed on the mounting plate 45 integrated with the moving table 14, and the suction pin direction turning arm 52 is pivotally attached to the bracket 51 fixed to the moving table 14. ing. A friction wheel 53 for turning the suction pin direction is pivotally attached to the tip of the arm 52. The friction wheel 53 has a pulley
54 are integrated. And the pulse motor 50
The pulley 55 fixed to the rotary shaft of the
A pulley 56 pivotally supported by the arm mounting pivot of the armature, the pulley 54, and a pulley 57 pivotally mounted in the middle of the arm 52.
A timing belt 58 is stretched between and so that the rotation of the pulse motor 50 is transmitted to the friction wheel 53.
An air cylinder 59 for turning the suction pin direction is fixed to the slide lateral bar 18, and a rod tip member 60 of the air cylinder 59 is in contact with an arm 52. The suction pin direction turning friction wheel 53 has _seventeenth to _sixteenth stations S17 to S16 when the slide lateral bar 18 is in the forward position and the tip member 60 of the air cylinder 59 is in the extended state.
The friction pin 41 of the suction pin (the one closest to the outer circumference of the index table 5) of the mounting head 7 located in the section is contacted.

The movable base 14 is provided with a correction turning operation means 65 as a third mounting head operation means for performing a correction turning of the suction pin of the mounting head 7. That is, the suction pin correction turning pulse motor 70 is fixed on the mounting plate 45 integrated with the moving table 14, and the suction pin correction turning arm 72 is pivotally attached to the bracket 71 fixed to the moving table 14. ing. A friction wheel 73 for turning a suction pin correction is pivotally attached to the tip of the arm 72. A pulley 74 is integrated with the friction wheel 73. And the pulse motor
Pulley 75 fixed to the rotating shaft of 70 and the bracket
A pulley 76 pivotally supported by an arm mounting pivot of 71, the pulley 74, and a pulley pivotally mounted in the middle of the arm 72.
A timing belt 78 is stretched between 77 and 77, and the rotation of the pulse motor 70 is transmitted to the friction wheel 73. An air cylinder 79 for suction pin correction turning is fixed to the slide horizontal bar 18, and a rod tip member 80 of the air cylinder 79 is in contact with an arm 72. The suction pin correction turning friction wheel 73 has fourteenth to thirteenth stations S ₁₄ when the slide lateral bar 18 is in the forward position and the rod 80 of the air cylinder 79 is in the extended state.
The suction pin (the one located closest to the outer circumference of the index stable 5) of the mounting head 7 located in the section from S ₁₃ to S ₁₃ comes into contact with the friction wheel 41.

As shown in FIG. 4, rocking prohibiting means 85 is arranged along the base of each mounting head 7 on the index table 5. The rocking prohibition means 85 includes a fixed block 84 fixed to the base (on the side of the index table), a lock pin 86 that is fitted in the block 84, and can be moved in and out, and an operating lever 87 that engages with the lock pin 86. A roller 88 pivotally attached to the tip of the operating lever 87 and a compression spring 89 for biasing the operating lever 87 in a direction in which the lock pin 86 is fitted into the main body block of the mounting head 7 are provided.

On the other hand, as shown in FIG. 4, a linear slide 90 is mounted on the base 141 fixed to the support frame 11 independently of the movable base 14.
The base portion 91 is fixed, and the swing prohibition releasing cam plate 93 is fixed to the tip of the slide portion 92 which is slidable with respect to the base portion 91. The slide portion 92 is connected to the operation rod 95 of the electromagnetic solenoid 94 fixed to the base 141 via the connecting member 96. Therefore, when the operation rod 95 is projected, the rocking prohibition releasing cam plate 93 is in the forward position, and the roller 88 at the tip of the operating lever 87 is pushed by the cam plate 93, and the operating lever 87 is pushed.
Rotates counterclockwise in FIG. 4 to disengage the lock pin 86 from the mounting head main body block so that the mounting head 7 can swing. It should be noted that on the body block side of the mounting head, holes that engage with the lock pin 86 are formed, for example, every 90 degrees in correspondence with the swing angle of the mounting head.

As shown in FIGS. 5 and 6, wedge-shaped locking member 100
The synchronizing means 99 having a slide guide 101 fixed to the moving base 14, a slider 102 slidably guided by the slide guide 101, and a synchronizing air cylinder 103 fixed on the slider 102. , The air cylinder 103
And an engaging member 104 fixed to the rod. A wedge-shaped locking member 100 is fixed to the slider 102. Further, the slide lateral bar 1 is provided in the inner groove of the locking member 104.
Roller 10 pivotally mounted on mounting plate 105 integrated into 8
6 is fitted.

On the other hand, on the index table 5 side, a gap 111 into which the wedge-shaped locking member 100 can be fitted is formed between the base flanges 110 of the adjacent mounting heads 7.

The wedge-shaped locking member 100 is the synchronization air cylinder 1
03 rod is in the contracted state, and the slide horizontal bar
When 18 is moved forward, it fits in the gap 111 on the index table side, and as a result, the movable table 14 rotates together with the index table 5.

The moving operation of the moving table 14 along the index table 5 is performed integrally with the index table 5, that is, in synchronization with the index table 5.
As shown in FIG. 1, the retreat operation along the arrow is performed by the return arm 121 fixed to the lower end of the return drive shaft 120 pivotally supported on the body frame 4 side. That is, the arm 121
The engaging pin 123 fixed to the moving base 14 in the engaging groove 122 at the tip of the
By engaging with the arm 121, the movable base 14 can be returned in the direction opposite to the traveling direction of the index table 5 by the clockwise rotation of the arm 121 (the arm position is indicated by the solid line from the virtual line L in FIG. 1). .

Next, the overall operation of the embodiment will be described.

The mounting head 7 that has mounted the chip-shaped electronic component on the printed circuit board at the _first station S ₁ in FIG. 8 moves sequentially with intermittent rotation of the disk-shaped index table 5 in the direction of arrow F in 5 ° increments. And faced the supply unit 8
Reach the 59th to 20th stations S _{59 to} S ₂₀ (each station is equipped with 3 supply units) and specify using the designated suction pin 9A, 9B, 9C The specified electronic component is adsorbed and held by the supplied supply unit to reach the _19th station S ₁₉ .

The origin of the mounting head 7 is returned from this station S ₁₉ to the next station S ₁₈ . That is, when it is necessary to return the mounting head 7 to the origin, the swing prohibition release cam plate 93 in FIG. 4 is set to the forward position before the mounting head 7 for which the origin should be returned reaches the station S ₁₉ , and the swing is prohibited. The roller 88 of the means 85 is pushed to disengage the lock pin 86 from the mounting head side main body block, so that the mounting head 7 can be rocked. Then, the slide lateral bar 18 on the movable table 14 is moved to the forward position by the counterclockwise swing of the swing arm 38, and the index table 5 of the wedge-shaped locking member 100 is moved.
Since the movable table 14 is made to move integrally with the index table 5 by fitting into the side gap 111, and the mounting head origin return air cylinder 29 in the swing operation means 32 is set in the extended state in advance. The origin return gear 23 meshes with the mounting head side 40 as shown in FIG. Then, the gear 23 causes the mounting head 7 to swing by a predetermined angle, for example, 90 degrees by the rotational driving force of the origin return pulse motor 20, and the suction pin holding the electronic component P as shown in FIG. Set so that the position is closer to the outer circumference.

This origin return operation of the mounting head is performed during one intermittent movement period of the index table 5 (and using a part of the stop period before and after that if necessary).

At this time, the suction pin (any of 9A, 9B, 9C) of the mounting head 7 moving from the station S ₁₇ to the next station S ₁₆ is swiveled at the same time. That is, when it is necessary to rotate the suction pin holding the electronic component in the direction, the air cylinder 59 in the direction rotation operation means 33 is set to the extension state in advance, and the forward movement of the slide lateral bar 18 causes the suction pin direction rotation friction. The wheel 53 contacts the suction pin side friction wheel 41, and the friction wheel 53 rotates the suction pin by a predetermined angle, for example, 90 degrees by the rotational driving force of the direction turning pulse motor 50, and the electronic component held by the suction pin. Transform the posture of.

Similarly, the correction pin is applied to the mounting pin (any of 9A, 9B, and 9C) of the mounting head 7 that moves from the station S ₁₄ to the next station S ₁₃ . That is, when it is necessary to correct the turning of the suction pin holding the electronic component, the air cylinder 79 in the correction turning operation means 65 is set to the extension state in advance, and the forward movement of the slide lateral bar 18 causes friction for turning the suction pin direction. The car 73 contacts the friction pin side friction wheel 41,
The friction wheel 73 rotates the suction pin by a minute angle (a required value obtained by image processing) by the rotational driving force of the correction turning pulse motor 70, and corrects the attitude of the electronic component held by the suction pin.

If any of the mounting head origin return, suction pin direction swing, and suction pin correction swing is unnecessary, the origin return air cylinder 29, direction swing air cylinder 59, and correction swing air cylinder 79 are not required. The air cylinder corresponding to the operation may be brought into the contracted state.

When one intermittent rotation operation of the index table 5 is completed, the slide lateral bar 18 is moved to the retracted position by the swing arm 38, the wedge-shaped locking member 100 is disengaged by the index table 5, and the movable base 14 is moved by the return arm 121. Moves backward on the arc locus and returns to the return position.

(Effects of the Invention) As described above, according to the mounting head operating mechanism of the component mounting machine of the present invention, the mounting head operating means for operating the mounting head is arranged on the movable table that moves in synchronization with the intermittent rotation of the index table. By providing the index table, the stop time of the index table can be shortened to increase the speed, and the component mounting efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a mounting head operating mechanism of a component mounting machine according to the present invention, FIG. 2 is a sectional view of the same side, FIG. 3 is a plan view of rocking operating means, and FIG. FIG. 5 is a plan view showing a head rocking prohibition means and means for releasing it, FIG. 5 is a plan view of a synchronizing means having a wedge-shaped locking member, FIG. 6 is a sectional view of the same side, and FIG. 7 is a component mounting machine. FIG. 8 is a front view showing the outline of the overall configuration of FIG. 8, and FIG. 8 is an explanatory diagram of the index table and the stations around it. 1 ... Base, 3 ... Printed circuit board, 4 ... Main body frame, 5 ... Index table, 7 ... Mounting head,
10 …… Mounting head operating mechanism, 12 …… Arc-shaped slide rail, 13 …… Slider member, 14 …… Movement base, 15 …… Linear slide, 18 …… Side horizontal bar, 20,50,70 …… Pulse motor , 23, 40 …… Gears, 32 …… Swing operation means, 33…
… Direction turning operation means, 41,53,73 …… Friction wheel, 29,59,79,1
03 …… Air cylinder, 65 …… Correction turning operation means, 93…
… Cam plate, 100 …… Wedge-shaped locking member, 111 …… Gap.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Ishikawa 2 Shimogiri Himegaoka, Kani City, Gifu Prefecture Kani Industrial Park Okuma Iron Works Co., Ltd. Kani Factory (56) Reference JP 62-55998 (JP, A) )

Claims (2)

[Claims] 1. A plurality of mounting heads are provided at equal angular intervals on the periphery of an index table that rotates intermittently, each mounting head is provided with a suction pin for picking up a component, and the mounting head at a predetermined position is attached to the index table. In a mounting head operating mechanism of a component mounting machine that is operated from the outside, mounting head operating means is arranged on a moving table that is arranged along the index table and moves forward and backward along an arc movement locus concentric with the intermittent rotation of the index table. The mounting head operation means can operate the mounting head during a period in which the movable table moves forward while maintaining a constant position with the index table in synchronization with intermittent rotation of the index table and a part of a stop period. A mounting head operation mechanism for a component mounting machine, which is characterized by a period. 2. The moving table comprises a wedge-shaped locking member,
The mounting head operating mechanism of the component mounting machine according to claim 1, wherein the mounting head operating mechanism rotates integrally with the index table during a period in which the wedge-shaped locking member is engaged with the index table side.