JP3322502B2 - Electronic component automatic mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component automatic mounting apparatus having a chip-shaped electronic component mounting head on the outer periphery of a rotary table.

[0002]

2. Description of the Related Art In general, a chip-shaped electronic component is taken out of a component supply device by a suction nozzle provided on a mounting head of a rotary table, and a position shift of the chip-shaped electronic component is recognized by a recognition device. There is known an electronic component automatic mounting apparatus in which a mounting head is rotated based on the electronic component and then the electronic component is mounted on a printed circuit board (for example, see Japanese Patent Application Laid-Open No. 3-78295).

In this type, when the mounting head is rotated, the mounting head is rotated while a pair of upper and lower cam followers supporting the mounting head are guided by a cylindrical rib cam. .

The cylindrical rib cam is provided with a notch, and a roller rest is arranged in the notch. When a pair of cam followers pass through the roller rest,
The mounting head supported by the cam follower integrally with the roller rest temporarily moves up and down, and by moving up and down the mounting head, the chip-shaped electronic component is taken out from the component supply device and mounted on the printed circuit board. I have.

[0005]

However, according to the conventional configuration, when a pair of cam followers move from the cylindrical rib cam to the roller rest, or when a pair of upper and lower cam followers come out of the roller rest, the roller rest is not moved. There is a problem that an impact is generated due to a step generated between the cylindrical rib cam and the cylindrical cam.

[0006] When this impact occurs, vibration occurs, so that the operation of taking out or mounting the chip-shaped electronic component becomes unstable, and the component that is being adsorbed shifts.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to reduce the impact of a cam follower on the roller rest when the cam follower moves on and / or out of the roller rest. An object of the present invention is to provide a mounting device.

[0008]

According to a first aspect of the present invention, a pair of upper and lower cam followers moving along a cylindrical rib cam pass through a roller rest disposed in a notch of the cylindrical rib cam. The mounting head supported by the cam follower integrally with the roller rest temporarily moves up and down, and the chip-shaped electronic component is taken out from the component supply device by the lifting and lowering of the mounting head, and the chip-shaped electronic component is placed on a printed circuit board. In the electronic component automatic mounting apparatus to be mounted, a guide inclined surface for guiding the cam follower is formed on a part of the roller rest on a side on which the cam follower moves and / or exits. is there.

The invention according to claim 2 is characterized in that the guide inclined surface is formed on a part of the roller rest on the side where the lower cam follower moves and / or exits.

According to a third aspect of the present invention, the roller rest includes a narrow guide portion through which only a part of the cam follower passes, on a part of a side on which the cam follower moves and / or exits, The guide portion is characterized in that the guide inclined surface is formed.

The invention according to claim 4 is characterized in that the roller rest is formed in a substantially T-shape to include the guide portion.

[0012]

According to the first to fourth aspects of the present invention, when the cam follower moves on the roller rest, even if there is a step due to dimensional tolerance between the roller rest and the cylindrical rib cam, the cam follower moves on the side on which the roller rest moves. Because there is a guide slope, you can move smoothly,
When a cam follower exits the roller rest,
Since there is a similar guide slope on the exit side of the roller rest, the exit can be made smoothly.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic component automatic mounting apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

1 and 2, reference numeral 100 denotes an automatic mounting device for chip-shaped electronic components. The electronic component automatic mounting apparatus 100 includes an electronic component supply section 101.
, Take-out section 102 and mounting section 103
It consists of

First, the electronic component supply section 101 will be described. The electronic component supply section 101 has a component supply table 1, to which a ball screw 5 is screwed via a nut 3. The ball screw 5 is connected to a motor 7 via a coupling 6. When the motor 7 drives the ball screw 5, the component supply table 1
Is guided by a pair of linear guides 9, 9 to reciprocate in the X direction.

The supply table 1 has a plurality of component supply devices 11.
The component supply device 11 is provided with a lever 13 (FIG. 1).

The lever 13 is engaged with a lifting lever 15 and when the lifting lever 15 moves up and down,
Swings. When the lever 13 swings, the tape wound around the tape reel 17 is fed out to a take-out section 102, which will be described later, and the chip-shaped components stored in the tape are moved to the component suction position I (see FIG. ).

The take-out section 102 is provided with a rotary table 21 (FIG. 1) which can be rotated intermittently.
A plurality of mounting heads 23 are mounted.

Each mounting head 23 is a head lifting table 2
6 and the head elevating table 26 is mounted on a pair of rails 28. A pair of rails 28
Is supported by a nut member 27 fixed to the outer peripheral portion of the rotary table 21 so as to be movable up and down.

A mounting plate 25 is fixed to the upper end of the head elevating table 26. The mounting plate 25 extends upward, and a pair of cam followers 29 is mounted on its upper end 25a as described later. I have.

The pair of cam followers 29 is
When the rotary table 21 is rotated, the mounting head 23 fixed to the mounting plate 25 follows the profile of the cylindrical rib cam 31 via the cam follower 29 when the rotary table 21 rotates. While moving up and down, the above rotary table 2
1 and rotates together.

The cylindrical rib cam 31, as shown in FIG.
Two places are notched (only one place is shown), and when a pair of cam followers 29 gets into one of the two places, the lifting mechanism 13 which operates by driving the cam 131
3, the elevating body 32 arranged in the notch portion is moved up and down, and is mounted integrally with the elevating body 32 (reference numeral 2 in FIG. 1).
3) goes up and down.

The elevating mechanism 133 has a lever 135 that is supported swingably via a pin 134. A cam follower 136 is provided at one end 135 a of the lever 135, and a cam 131 contacts the cam follower 136.
When 5a is pushed down, the other end 135b of the lever 135 is pushed up against the spring force of the spring 137. A roller 137 is engaged with the other end 135b of the lever 135, and the roller 137 is
38, and the vertical rail 138 is attached to the frame 1
It moves up and down along a pair of guides 139 fixed to 44.

At the lower end of the vertical rail 138, as will be described later, a roller rest 140, which constitutes a main part of the present embodiment, is mounted.
The cylindrical rib cam 31 is arranged in the notch. The roller rest 140 and the vertical rail 138 constitute the elevating body 32 described above.

Referring to FIG. 8 and FIG.
When it is not necessary to take out the component, it is held at the upper limit position via the clutch lever 141.

As shown, a pair of cam followers 29 moving along the cylindrical rib cam 31
When the rider rides on the vertical rail 40, the vertical rail 138 is constantly urged downward by a spring (not shown), and according to the profile of the cam 131, as shown in FIGS.
The lever 135 rotates clockwise. According to this, the elevating body 32 composed of the vertical rail 138 and the roller rest 140 descends, and the mounting plate 25 descends integrally with the elevating body 32, and is fixed to the mounting plate 25 via the head elevating table 26. The mounting head 23 descends.

The pair of cam followers 29 are mounted on the upper end 25a of the mounting plate 25 as described above. The upper cam follower 29a is directly attached to the attachment plate 25,
The lower cam follower 29b is attached to a lever 143. The lever 143 is attached to the attachment plate 25 via a pin 142. The lever 143 is further urged upward through a spring 145.

Two notches of the cylindrical rib cam 31 are shown in FIG.
With reference to the drawing, the electronic component corresponds to two positions, a suction position I and a mounting position III.

At the suction position I, the mounting head 23 moves up and down to take out the supplied electronic components. At the mounting position III, the mounting head 23 moves to mount the electronic components taken out on the printed circuit board as described later. Go up and down.

As shown in FIG. 3, the mounting head 23 has a pulse motor 39 composed of a stator 35 and a rotor 37 fitted therein via a bearing 36. The pulse motor 39 allows the mounting head 23 to be mounted. Itself is rotatably formed.

A permanent magnet 43 is embedded all around the outer periphery of the rotor 37.
An iron core 45 magnetized by the permanent magnet 43 is provided with irregularities repeatedly in the circumferential direction. Also, the stator 3
5 is provided with an iron core 47 on the inner periphery thereof.
Protrusions are formed at appropriate intervals in the circumferential direction, and a coil 49 is wound around the protrusions.

The details of the coil 49 will be described later.
A pulse current is supplied from a drive unit 200 disposed above the rotary table 21, and the pulse current is supplied to the core 4 magnetized by the permanent magnet 43.
A repulsive force is generated between the protrusions 5 and 5, and the rotor 37 constituting the mounting head 23 is rotated by a predetermined angle according to the number of pulses of the pulse current.

The rotor 37 constituting the mounting head 23 has six suction nozzles 51 (only two are shown).
It is provided at equal intervals in the circumferential direction and penetrates up and down so as to be able to move up and down. Each of the suction nozzles 51 is provided with a vacuum suction hole 53. The vacuum suction hole 53 communicates with a horizontal hole 55 of the suction nozzle 51 on the way, and the horizontal hole 55 corresponds to the vertical position of the suction nozzle 51. Thus, it communicates with the vacuum chamber 57 at the center of the rotor 37 through the communication hole 56.

Specifically, at the position of the right nozzle 51 in the figure, the horizontal hole 55 communicates with the vacuum chamber 57 through the communication hole 56, and at the position of the left nozzle 51 in the figure, the horizontal hole 55 Does not communicate with the vacuum chamber 57. The vacuum chamber 57 is connected to a vacuum tube 59 (FIG. 1) through a hole 58 formed in the rotor 37, and the vacuum tube 59 is connected to a vacuum generator (not shown).

An engaging body 61 is integrally formed at the upper end of the suction nozzle 51, and the engaging body 61 is urged downward via a spring 62. The upper end 61a of the engagement body 61 can be engaged with the lower end 63a of the lever 63, and the lever 63 is fixed to the fixed portion 3 integrally extending upward from the rotor 37.
7a is connected via a pin 65. The upper end 63b of the lever 63 is urged outward by a spring 67, and the urging force holds the engaging force between the engaging body 61 and the lever 63.

Next, the operation of the take-out section 102 will be described. The suction nozzle 51 (the right nozzle in the figure)
When the rotary table 21 reaches the suction position I of the take-out section 102 with the rotation of the rotary table 21, the rotation of the rotary table 21 is temporarily stopped, the mounting head 23 descends as described above, and the tip-shaped component 300 is adsorbed. At this time, since the horizontal hole 55 of the suction nozzle 51 communicates with the vacuum chamber 57 via the communication hole 56, a vacuum is generated in the vacuum suction hole 53.

When the chip-shaped component 300 is sucked, the mounting head 23 is raised, and the rotary table 21 is rotated again.

Referring to FIG. 2, when the mounting head 23 that has picked up the chip-shaped component 300 reaches the component recognition position II with the rotation of the rotary table 21, the component recognition device 69 operates and the suction nozzle 51 is operated. Of the chip-shaped component 300 with respect to the position is recognized. If the position of the chip component 300 is shifted, the position shift is corrected in any of the sections up to the mounting position III. The section for this correction will be omitted from the description together with the illustration.

When the mounting head 23 that has absorbed the chip-shaped component 300 has reached the mounting position III with the rotation of the rotary table 21 after correcting the positional deviation, the rotation of the rotary table 21 is stopped, and as described above. The mounting head 23 descends, and the chip-shaped component 300 at the tip of the suction nozzle 51 is moved to an electronic component mounting section 103 described later.
Mounted on a printed circuit board.

When the chip-shaped component 300 is mounted on the printed circuit board, the rotary table 21 rotates and is sent to the next station at the mounting position III, where the mounting head 23 is lowered and the contact head (not shown) is contacted. The tip of the suction nozzle 51 hits the table, and the suction nozzle 51
Is pushed up, and the upper end 61 a of the engagement body 61 is
And the suction nozzle 51 is held like the suction nozzle 51 on the left side in FIG.

Referring to FIG. 2, the electronic component mounting section 103 is moved in the Y direction by the Y-axis motor 71, and is moved in the X direction by the X-axis motor 75 on the Y table 73. X that moves in the X and Y directions
And a Y table 77. This XY table 77
A glued printed board 79 is supplied on the upper side from an adjacent supply unit (not shown), and the above-described chip-shaped electronic component is mounted on the printed board 79.

According to this embodiment, the mounting head 2
Drive unit 2 for driving the pulse motor 39 of FIG.
00 is the rotary table 2 as shown in FIGS.
The electric wiring is arranged using one mother board 210 as shown in FIG.

That is, the output shaft 8 of the rotary table 21
1 extends upward through the index unit 83 as shown in FIG. 1, and as shown in FIG.
Of the driver box fixing block 8
5 is fixed.

An output shaft block 87 is fixed to the fixed block 85, and a rotating shaft 93 of a slip ring 91 is opposed to the output shaft block 87 via a coupling 89. The coupling 89 can transmit the torque even when the output shaft 81 and the rotation shaft 93 do not coincide with each other. Further, reference numeral 95 denotes a slip ring fixing plate.
The slip ring 91 is fixed.

The driver box fixing block 85 is connected to the driver box cover 18 via a screw 86.
7, the cover 187 and the fixing block 85 are attached.
And a motherboard mounting plate 88 is interposed between them. As shown in FIGS. 5 and 6, a board mounting plate 97 is fixed to the motherboard mounting plate 88 via a screw 96. The board mounting plate 97 has the same number of pulse motors 39 as the mounting heads 23. A driver board 98 and a local control board 99 are mounted. As shown in FIG. 4, a plurality of collars 111 are provided on the motherboard mounting plate 88.
, One motherboard 210 is screwed.

The connector 210 of the motherboard 210
As shown in FIGS. 4 and 7, a connector 99a of the local control board 99 is connected to a, and the local control board 99 and the driver board 98 are connected via a connector code 113. The driver board 98 and the coil 49 (FIG. 3) of each pulse motor 39 described above are connected via a connector cord 115.

The connector 21 of the motherboard 210
0b is connected to a drive and communication code 116, and this code 116 is connected to the power supply unit 117 and the CPU 119 via the slip ring 91,
The ROM 119 and the RAM 123 are connected to the CPU 119. In FIG. 5, reference numeral 125 denotes a speed reducer, and 127 denotes an input shaft.

Thus, according to this embodiment, a pair of cam followers 29 moving along the cylindrical rib cam 31 are provided.
However, the invention is characterized in that the impact generated when passing the roller rest 140 of the elevating body 32 is reduced.

Referring to FIG. 12, a part of roller rest 140, that is, a part of roller rest 140 on which cam follower 29 rides and exits, has a guide inclined surface 140 for guiding lower cam follower 29b.
a, 140b are formed. This roller rest 14
FIG. 13 shows a plane view of 0.
The roller rest 140 is disposed in a notch 31 a formed in the cylindrical rib cam 31. Roller rest 1
40 has a substantially T-shaped cross section, and a narrow guide portion 151 extending to both sides is formed on an outer peripheral portion of the roller rest 140. And the above-mentioned guide inclined surfaces 140a, 140b
Are formed on the guide portions 151 extending on both sides.
In order to include the guide portion 151, the roller rest 140 is formed in a substantially T-shaped cross section as described above, and the cutout portion 31a formed in the cylindrical rib cam 31 is also formed in a substantially T-shaped shape. ing.

When arranging the roller rest 140 in the notch 31a, as shown in FIG. 12, the upper surface A is arranged so as to match, so that the step between the cylindrical rib cam 31 and the roller rest 140 due to dimensional tolerance is lower than the lower surface. Appears in B.

Referring to FIG. 14, when a pair of cam followers 29 moving along cylindrical rib cam 31 move onto roller rest 140, lower cam follower 2
9b moves by being guided by the guide inclined surface 140a. At this time, the lower cam follower 29b is
And swings around the pin 142 to move up and down against the spring force of the spring 145.

At the time of transfer, the vehicle moves on the guide inclined surface 140a located at the same position as the lower surface of the cylindrical rib cam 31, so that the impact at the time of transfer is reduced, and the cam follower 29 is moved.
b moves smoothly to the roller rest 140.

Referring to FIG. 15, when making a transfer, first, as a first step, a part (almost half) of cam follower 29 b moves on guide inclined surface 140 a of guide 151, and after passing over guide 151, In two stages, all of the cam followers 29b move onto the roller rest 140. Therefore, the impact at the time of the transfer of the cam follower 29b is sufficiently alleviated.

When the transfer is completed, FIGS. 16 and 17
As shown in the figure, the pair of cam followers 29 are completely located on the roller rest 140, and at this time, the movement of the cam follower 29 is temporarily stopped, and the roller rest 140 and the cam follower 29 29 moves up and down together.

The above is the operation when the cam follower 29 moves, but when the cam follower 29 exits, almost the same operation as described above is performed.
By using b, a smooth exit is possible.

Although the present invention has been described based on one embodiment, the present invention is not limited to this. Various modifications are possible.

[0057]

As described above, according to the first to fourth aspects of the present invention, the guide inclined surface is formed in a part of the roller rest, so that the impact when the cam follower moves on and off can be reduced. This allows the cam follower to move smoothly.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an electronic component automatic mounting apparatus according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially cutaway side view showing the mounting head.

FIG. 4 is a side view showing a drive unit.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a half plan view showing a driver box.

FIG. 7 is a control block diagram.

FIG. 8 is a front view showing an elevating mechanism of an elevating body (roller rest).

FIG. 9 is a side view of FIG.

FIG. 10 is a front view showing an elevating mechanism of an elevating body (roller rest).

FIG. 11 is a side view of FIG. 10;

FIG. 12 is a side view showing a roller rest.

FIG. 13 is a plan view of FIG.

FIG. 14 is a side view showing the roller rest during transfer.

FIG. 15 is a plan view of FIG.

FIG. 16 is a side view showing the roller rest after the transfer.

FIG. 17 is a plan view of FIG. 16;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Rotary table 23 Mounting head 29 Cam follower 29b Lower cam follower 31 Cylindrical rib cam 31a Notch part 32 Lifting body 133 Lifting mechanism 140 Roller rest 140a, 140b Guide inclined surface 151 Guide part

Claims (4)

(57) [Claims] When a pair of upper and lower cam followers moving along a cylindrical rib cam pass through a roller rest disposed in a cutout portion of the cylindrical rib cam, the cam follower is supported by the cam follower integrally with the roller rest. The mounting head is temporarily moved up and down, and by moving the mounting head up and down, the chip-like electronic component is taken out from the component supply device, and the electronic device is automatically mounted on the printed circuit board. Transfer side, and / or
Alternatively, a guide inclined surface for guiding the cam follower is formed in a part of the roller rest on the exit side, and the electronic component automatic mounting apparatus is characterized in that: 2. The electronic component automatic mounting apparatus according to claim 1, wherein the guide inclined surface is formed on a part of the roller rest on a side where a lower cam follower moves and / or exits. . 3. The roller rest according to claim 1, wherein the roller follower has a narrow guide portion on a side where the cam follower moves and / or exits, and a narrow guide portion through which only a portion of the cam follower passes. The electronic component automatic mounting device according to claim 1, wherein an inclined surface is formed. 4. The automatic electronic component mounting apparatus according to claim 3, wherein the roller rest is formed in a substantially T shape so as to include the guide portion.