JPS62106694A - Mounting head of chip electronic parts - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a mounting machine for mounting chip-shaped electronic components onto a printed circuit board, etc., and in particular, the present invention aims to simplify the structure and speed up the mounting process. The present invention also relates to an apparatus head for chip-shaped electronic components that can be mounted with high precision.

[Prior Art] When automatically mounting chip-shaped electronic components on a printed circuit board using a mounting machine, it is necessary to It is necessary to align the center with the center of the suction nozzle, that is, to perform centering.

Conventionally, there have been two main methods for centering when mounting a chip-shaped electrical component on a printed circuit board using a mounting machine. That is, the first method is to install an intermediate station for positioning between the electric component supply device and the printing board, and to perform centering (positioning of chip-like components) at this intermediate station. JJ method (for example, JP-A-Sho [io-1553
25), and the first method is a method in which centering is performed within the mounting head while the electronic component is transported to the printed circuit board by the mounting head of the mounting machine (for example, Japanese Patent Laid-Open No. 57-15694). 59-22427 once
No. 9).

Furthermore, in the second method as well, the suction nozzle is
The electronic component is moved 54H between the position (height) where the component is picked up or mounted and the position (height) where it is centered, and the method of centering is performed using independent drive means each having a drive source. , or a method in which an air cylinder is used as a driving source with width L2 +t=i' for lifting and centering one part (Japanese Patent Laid-Open No. 59-22427)
However, even if a single drive source is used to lift, lower, and center electronic components,
In other words, the drive system that lowers the suction nozzle is separate and independent from the drive system for centering, and raising and lowering the suction or mounting of electronic components from the centering position and centering each require a dedicated drive system. This was done using an L stage.

[Problems to be solved] 1] Conventional centering method υ in the above device 1' machine
In the first method, an intermediate station is provided and the electronic components are centered (positioned) there, so a positioning device and drive source for centering must be provided separately from the placement machine. In addition, there is a problem that an independent centering process is required, which increases the cost. In addition, in the second centering method, since centering is performed while the electronic component is being transported, although this structure can be made into a cylinder, a driving means for opening and closing the chuck jaws for centering the electronic component is provided. Since the mounting head has a built-in driving means for raising and lowering the suction nozzle and operating the suction nozzle at predetermined timing, there is a problem that the mounting head itself becomes large and complicated.

Furthermore, the conventional single drive stage for raising and lowering electronic components in a mounting machine requires the use of a single drive stage dedicated to raising and lowering, which poses a problem in that the mounting machine becomes complicated and large. In addition, the driving means for raising and lowering electronic components between the suction or mounting position (centering position) often uses the lifting and lowering movement of the central axis as a driving source, so the lifting and lowering movement of the central axis is linked to other -1st stage 1 For example, it is difficult to use as a centering device's wIA reference source,
Further, even if it could be used as another driving means, there was a problem that the structure would be extremely complicated.

The present invention has been made in view of the problem described in F, and is capable of accurately centering electronic components without requiring a special drive source or complicated drive means, and regardless of the size or shape of the electronic components. It is an object of the present invention to provide a mounting head for chip-shaped electronic components, which has a simple structure and allows the electronic components, that is, the suction nozzle, to be raised and lowered without providing any special driving means.

[Means for solving the problem] Item L1 [In order to achieve the first objective, the head of the device for unexploded 11 chip-shaped electronic components is designed to suck and hold the electronic components.]
A suction nozzle with a 1-degree drop, and a suction nozzle that adjusts the height of the suction nozzle. Two sets of centering chuck claws are located on the center line of the suction nozzle, which is provided at the abutting portion of these two sets of centering chuck claws and at the engagement opening, respectively, and opens and closes these two sets of centering chuck claws. One tapered cam is provided, and if necessary, the centering chuck claws can be opened and closed independently by the two cams shown in L.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

Figure 11Δ is a front view of the main parts of the unembodied mounting machine; Figure 52 is an overall F-plane view of the mounting machine; Figure 4 is an L side view of the mounting head, Figure 5 is a side view of the mounting head, Figure 6 is a sectional view of the main parts of Figure 3 (line B-B), and sections 7U4 to 11
The figure shows an explanatory diagram of the operation of the suction nozzle and the centering chuck claw.

In these drawings, reference numeral 10 is a mounting head that forms the main part of the mounting machine. Guides 11 are arranged in the y-row on both sides, and guide the movement of the first moving member 12 in the X-axis direction. 13 is a second moving member, which is supported by the first moving member 12 so as to be movable in the Y-axis direction. Further, this second moving member 13 rotatably supports the mounting head 10. 14 is a drive stage for rotating the rad 10 to the mounting supported by the second moving member 13, and the air cylinder 14
It consists of a rack 14b, a rack 14b, and a Bion 14c. Therefore, the mounting device 10 moves in the X- and Y-axis directions and rotates to take out the electronic component P from the 1E child component supply device 15, transport it to a predetermined position t on the printed circuit board 16, and mount it. .

The mounting head 10 consists of a main body 200, and a vacuum chuck device 21300 and a centering device 21400 incorporated into the main body 200.

Here, the vacuum chuck device 'a 300 will be explained in detail.

The Sada and Tochiya 2 device 300 has a center number of the main body 200,
:, lj1 descending (L-drive) 11[ in the axial direction of the main body 200
The southern central axis 301 is provided. This central axis 301 is
A suction hole 302 is formed in the center, and a suction hole 302 and an i! I! Subsequently, a nozzle mounting hole 304 having a larger diameter than the suction hole 302 is formed, and a
A push piece 305 is provided for forcibly pushing open the centering chuck claws, which will be described later.

The nozzle mounting hole 304 has an opening for the suction nozzle 303 to slide (on 1 f), and the suction nozzle 303
is designed to fall down due to its own hair and spring 306. This suction nozzle 303 picks up 'city f' and part P,'
When suctioning at the take-out section S of the heavy component supply device 15, and J! When mounting on &t6-1-, center axis 301
At this time, the centering chuck claws are pressed open and the centering chuck claws are pushed open as described later. Reference numeral 306 denotes a weak pressure spring, which is installed inside the nozzle mounting hole 304 so as to urge the suction nozzle 303 in the opposite direction.

On the other hand, this pressure spring 306 is operated by a vacuum chuck,
The vacuum pressure inside the nozzle mounting hole 304 causes the suction nozzle 30 to
3 is sucked, the suction nozzle 303 slides northward (
It does not have a strong enough urging force to prevent the upper yl).

In addition, the suction nozzle 303 has a guide hole 30 provided on the side.
7, by engaging a pin 308 implanted in the center shaft 301, the vertical stroke is regulated and separation from the center shaft 301 is prevented by +1.

At the tip of the suction nozzle 303, a flange-shaped positioning piece 309 is formed that comes into contact with the tip surface of the main body 200, and further at the tip, a thin nozzle 310 with a flat suction surface for the electronic component P is formed. is the provision. The tip surface of the main body 200 is in contact with a positioning piece 309, and serves as a stopper 201 that positions the suction nozzle 303 at a position for centering the child component P at 7. It has the function of regulating the

In addition, a driving f stage 312 consisting of an air cylinder is connected to the F- end of the central shaft 301, and the central shaft 301 is connected to the F- end.
Although not shown in the figure, one end of the suction hole 302 has a vacuum pump hose, etc. It is close.

Next, the centering device 400 will be explained.

Chuck claws 401 and 402 for centering are rotatably attached to four slits 202 formed on the side surface of the main body 200 at intervals of 901 cm by shafts 407, respectively. These centering chars, grip claws 401,
One pair of opposing chuck claws 402 is used as a first centering chuck claw 401, and the other opposing pair is used as a second centering chuck claw 402. Therefore, the first and second centering chuck claws 401, 402 are arranged perpendicular to each other. Moreover, these first and second centering chuck claws 401, 4
Claws 1403 and 404 are formed at the tip of 02 toward the nozzle 310 of the suction nozzle 303, and contact portions 405 and 406 are formed at the two ends toward the central axis 301. The claws 403 and 404 are connected to the positioning piece 3 by the slit 312 provided in the positioning piece 309 of the suction nozzle 303.
It can be closed without interfering with 09.

On the outer periphery of the central shaft 301 facing the contact portions 405 and 406, there are provided tapered cams 408 and 409 that expand downward and are made up of a first cam 408 and a second cam 409. The first cam 408 is formed into a ring shape with a frustoconical outer shape, contacts the contact portion 405 of the first centering chuck claw 401 at five points, and is attached to the central shaft 301 so as to be able to slide in the axial direction. It is. Also, the contact portion 406 of the second centering chuck claw 402 of the first cam 408
Notch grooves 408a are provided in the axial direction at three locations facing each other and having an interval of 180 degrees.

The second cam 409 includes a ring portion 409a and a ring portion 40.
It consists of two cam parts 409b extending upward from 9a with an interval of 180 degrees. It is fitted into the 5-groove 408a with 71 sliding holes. Therefore, the cam portion 409b of the first cam 409 is in contact with the contact portion 406 of the second centering chuck claw 402, and is capable of sliding relative to the first cam 408.

These first and second cams 408, 409 are connected to respective stoppers 410, 41 which are fixed to the central shaft 301.
1 restricts upward sliding, and the first pressing spring 41 disposed on the side of each cam 408, 409
2 and the second pressing spring 413 are always biased upward.

Therefore, these first and second cams 408.40
9 is lowered by the lowering of the central axis 301, and
Pressing springs 412 and 413 when the central axis 301 rises
'! of each centering chuck jaw 401, 402 rises due to the biasing force of . The J-contact portions 405 and 406 are pressed to close each of the claw portions 403 and 404 in the direction of the suction nozzle 303.

The electronic component mounting head device in the mounting machine of this embodiment having such a configuration operates as follows.

By the moving member 12.13 and the drive stage 14, it is attached to the take-out section S of the city part supply device 15.
When O is positioned, the central shaft 301 is lowered by the WJA movable stage 311. As the center shaft 301 is lowered by 'F', the first and second cams 408 and 409 are also lowered, and the first and second centering chuck jaws 401,
At the same time, as the center shaft 301 descends, the suction nozzle 303 releases its contact with the contact portions 405 and 406 of the
The centering chuck claws 401 and 402 released from the contact portions 405 and 406 are pushed open and lowered to come into contact with one electronic component P (FIG. 7).

At this time, the weight of the suction nozzle 303 and the pressure spring 3
Centering chuck jaw 401 with only the urging force of 06,
If you cannot open 402, press the push piece 30 at the tip of the center shaft 301.
5 pushes the positioning piece 309 of the suction nozzle 303 to forcefully open the claw portions 403 and 404, and the suction nozzle 303
is lowered and brought into contact with the electronic component P (FIG. 8).

Next, a vacuum pump (not shown) is activated, and the electronic component P is sucked by the suction nozzle 303. 'When the central axis 301 is raised by 1 with the weight component P being sucked and suction by the vacuum pump is continued, the body of the suction nozzle 3031 is moved by the elastic force of the pressing spring 306 due to the vacuum pressure inside the nozzle mounting hole 304. The positioning piece 309 moves upward until it comes into contact with the stopper 201 on the distal end surface of the main body 200 (FIG. 9).
. As a result, the electronic component P is positioned at a height position, that is, at a centering position.

After positioning the electric component P to the centering position, when the center shaft 301 is further moved by 1=91, the first and second cams 408 and 409 are moved to the centering position by the first and second pressing springs 412 and 413. chuck jaw 401
．． 402! /l contact portions 405 and 406, and act to close the respective claw portions 403 and 404. As a result, one side of the electronic component P is
Positioning is performed by being sandwiched with uniform force by a pair of first centering chuck claws 401 from both sides, and
The side surface in the other direction is centered by being pinched from both sides by a pair of second centering chuck claws 402 with uniform force (FIG. 10).

When the electronic component P is centered by the centering chuck jaws 401 and 402, the first and second cams 408 and 409 stop, and when the center shaft 301 is further rotated, the pressure springs 412 and 413 are displaced. This causes the central shaft 301 and the cams 408, 409 to slide relative to each other.

In this case, the first cam 408 and the first centering chuck claw 401 and the second cam 409 and the second centering chuck claw 402 operate independently. Therefore, when the electronic component P is not a square but a rectangle, for example, if the second centering chuck jaw 402 performs positioning in the long direction of Stops at h L, the second cam 409 stops at a state 74 where its sliding (L, rise) is smaller than the amount of sliding of the first cam 408 F
(Figure 11).

In this way, each centering chuck jaw 401.40
Since the sliding amount of each cam 408, 409 is controlled according to the degree of closing of the electronic parts P, accurate centering can be performed even when the electronic parts P have different sizes and shapes. Also.

This centering is performed while the mounting head 10 is being moved from the component supply device 15 to a predetermined position on the printed circuit board 16.

Therefore, when the mounting head 10 reaches a predetermined position on the printed circuit board 16, centering has been completed, and by lowering the center shaft 301 and then stopping the suction of the vacuum pump, the electronic component P is placed on the printed circuit board. 16 predetermined positions.

Note that the centering device of the above embodiment has the first cam 40
8 and the second cam 409 are positioned at the same height, and the first and second centering chuck jaws 401 and 402 are configured to have the same shape and move in the same way. The moving speed and amount of movement of 402 are the same, allowing more accurate positioning.

As mentioned above, according to the mounting head of this embodiment, the suction nozzle of the zero empty chuck device can be raised and lowered between the suction position and the centering position without using a special drive source or complicated driving means. Furthermore, the vertical movement of the center shaft can be used as a dedicated drive source for the centering device. Furthermore, by using the above-mentioned centering device, centering can be performed regardless of the size and shape of the electronic component, and since the vertical movement of the central axis can be used exclusively for centering, a complicated drive means for centering is required. Alternatively, the structure can be simplified without requiring a special driving source.

The mounting head for chip-shaped electronic components according to the present invention is not limited to the embodiment described in 1-, but also includes the following modifications, for example.

(A stopper that restricts the high position of the O suction nozzle is provided on a part other than the tip surface of the main body, for example, on a pusher piece at the tip of the central shaft.

■ Place the display device in a position other than vertically, for example with a certain degree of inclination or with a wooden structure! When placed in a calm state, when placed in a watery state, the center axis and suction 71
'The nozzle slides in the direction of water f.

■ The suction nozzle's own hair is made sufficiently large and attached to the hole in the central shaft without using a weak suppression spring.

■ First cam and second cam mounted on the central shaft! S.

iK built-in type of both cams 7. T, a variation of 1.

- The suction means is a means other than a vacuum chuck device, such as a magnetic chuck device.

[Effects of Development II] As described above, with the mounting head for undeveloped IJ+ chip-shaped and V-finished parts, the structure can be simplified, and mounting work can be performed quickly and with high precision. It has the effect of

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the main parts of the mounting machine of this embodiment, and FIG. 2 is a front view of the entire mounting machine.
Fig. 3 is a vertical sectional view of the mounting head, Fig. 4 is an L side view of the SC mounting head, Fig. 5 is a side view of the mounting head, and Fig. 6 is a 3rd side view of the mounting head.
The main part sectional views in the figure and FIGS. 7 to 1I are explanatory diagrams of the operation of the suction held and the centering masu yak claw. IO = mounting head 200, main body 201: stopper 202 Nislit 300: suction device 21
301: Central axis 302/suction hole 303
: Suction nozzle 304: Nozzle mounting hole 305: Pressing piece 306: Pressing spring 309: Positioning δ determining piece 310.
Nozzle 400: Centering device 401: First centering chuck claw 402: First centering chuck claw 403.404: Claw portion 405.406: Contact portion

Claims (2)

[Claims] (1) A suction nozzle that attracts and holds electronic components and can be raised and lowered, a stopper that positions the suction nozzle in the height direction, and a pair of claws that can be opened and closed are located near the tip of the suction nozzle. Two sets of centering chuck jaws located opposite to each other, and a suction nozzle that is provided so as to be able to engage with the contact portions of these two sets of centering chuck jaws, and opens and closes these two sets of centering chuck jaws. A mounting head for chip-shaped electronic components characterized by comprising two tapered cams provided on a center line. (2) The mounting head for chip-shaped electronic components according to claim 1, wherein the centering chuck claws can be opened and closed independently by two cams.