JPH025037B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a device for vacuum-chucking chip-shaped electronic components (hereinafter referred to as chip components) and mounting them at a predetermined position and in a predetermined attitude. It is something.

[Prior art]

FIG. 1 shows an example of a known electronic component mounting device.

A is a supply section for chip parts 2, B is a part for receiving chip parts, and C is a mounting device.

In the supply section A, a supply device 1 provided with a plurality of grooves 3 aligns parts 2 of different types along each groove and feeds them in the direction of the arrow X' shown in the figure. The above-mentioned feeding device 1 has a structure that allows it to be selectively moved in the Y-Y' direction, so that a desired type of chip component 2 can be placed opposite the mounting device C.

In the part B that receives mounting, a substrate 8, which is a member to be mounted, is placed on an XY table 6 that can be driven in the X-X' axis and Y-Y' axis directions, and the board 8 is placed on a positioning pin 7.
It is located by

The mounting device C is configured as follows.

13 is a base body that supports this device, and a fixed cylinder body 39
The fit is retained.

The hollow main shaft 10 is rotatably supported by the fixed cylindrical body 39 via a bearing 17, and is intermittently driven to rotate via spur gears 14, 15 and a timing belt 16.

A flange 11 is fixed to the lower end of the hollow main shaft 10, and a plurality of nozzle holders 29 are rotatably fitted and held on this flange 11.

A rotary drive shaft 18 is supported within the fixed cylindrical body 39 via a needle bearing 12,
Its lower end projects below the flange 11.

A timing pulley 45 is attached to the above-mentioned protrusion, and a timing pulley 33 is attached to the above-mentioned nozzle holder 29.
They are fixed to each other and are transmitted by a timing belt 46. 43, 43' are rotation drive shafts 1
8 drive gear.

The suction nozzle 5 is attached to the nozzle holder 29, and in order to communicate vacuum for suction to the suction nozzle 5, a vacuum passage is provided as described below.

Reference numeral 19 denotes a gap formed between the fixed cylindrical body 39 and the rotating drive shaft 18, and the nipple 22 is fixed to the fixed cylindrical body 39 by passing through the gap 19 so as to communicate with the gap 19. On the other hand, a communication hole 20 communicating with the above-mentioned gap 19 is bored in the collar body 11, and a nozzle holder 29
It communicates with the suction nozzle 5 through a long hole 35 provided in the side wall.

According to the conventional mounting device configured as described above, the chip component 2 is
When the hollow main shaft 10 is rotated by 180 degrees and the suction nozzle is moved to position E, the sucked chip parts are conveyed onto the substrate 8 in an attitude rotated by 180 degrees. In order to make the above posture (that is, the direction in the horizontal plane) the desired posture, the rotation drive shaft 1
8 is rotated by a pulse motor (not shown), and the nozzle holder 29 is rotated via the timing belt 46.

The conventional device described above has the following problems.

(i) Since all of the plurality of nozzle holders 29 are driven by one timing belt 46, the suction nozzle 5 is held at the same angle both when mounting the chip component 2 on the board 8 and when suctioning it from the supply device 1. only,
Since it rotates, the chip part 2 when always attracted
The rotation angle must be memorized and corrected when installing the device.

(ii) After picking up the chip part 2, transport it and place it on the board 8.
When positioning the chip component 2 from the outside before mounting it on the chip component 2, it is very difficult to position the chip component 2 because the rotational positions of the chip component 2 are varied.

(iii) Since the vacuum source for suction is communicated with all the suction nozzles 5 through one nipple 22,
When the vacuum source is turned off when placing the chip parts held by suction on the substrate 8, the chip parts 2 which were suctioned by the other suction nozzles 5 also fall, as a matter of course. For this reason, only the suction nozzle 5 for mounting the chip component 2 onto the substrate 8 must have a built-in vacuum switching mechanism for turning off the vacuum, making the mechanism of the rotating part extremely complicated.

[Purpose of the invention]

In view of the above-mentioned circumstances, the present invention allows the mounting posture of chip components to be directly controlled arbitrarily (without being influenced by the previous mounting operation), makes it easy to position the chip components, and moreover, The present invention aims to provide an electronic component mounting device with a simple configuration that does not require a built-in vacuum switching mechanism.

[Summary of the invention]

In order to achieve the above object, the mounting device of the present invention rotatably supports a plurality of suction nozzles along the circumference on a flange fixed to the lower end of a hollow main shaft that can be rotated. A nozzle rotation drive shaft is supported in the hollow part of the main shaft, a transmission means is interposed between the lower end of the nozzle rotation drive shaft and the suction nozzle, and a vacuum is applied to the suction nozzle. In the electronic component mounting device that communicates with Gears are attached to each of the 2n suction nozzles and the n-fold rotating shaft, and one gear is attached to each of the n-fold rotating drive shafts, and two gears are located at symmetrical positions separated by 180 degrees. and a gear attached to each of the suction nozzles, and a groove is provided on the outer periphery of the main shaft, and a ventilation path is provided to communicate each groove with each suction nozzle, and the main shaft A sleeve is slidably fitted onto the sleeve, sealing means is provided to maintain airtightness between the grooves, and vacuum connecting means is provided which penetrates the wall of the sleeve and faces each of the grooves. do.

[Embodiments of the invention]

Next, one embodiment of the present invention will be described with reference to FIGS. 2 to 5.

FIG. 2 is a vertical sectional view of an embodiment in which the number of n in the present invention is 2, FIG. 3 is a sectional view taken along a vertical plane perpendicular to the cut plane in FIG. 2, and FIG. The FF sectional view and FIG. 5 are also GG sectional views.

In this example, the number of installed suction nozzles 2n is four. For convenience of explanation, the four suction nozzles in this example are given drawing reference numbers 5a, 5b, 5c, and 5d, respectively. Figure 2 shows the suction nozzles 5a and 5b facing each other with a 180° separation, and Figure 3 shows the suction nozzles 5a and 5b facing each other.
Suction nozzles 5c and 5d arranged 90 degrees apart are visible.

In this embodiment, reference numeral 55 denotes a hollow main shaft corresponding to the hollow main shaft 10 in the conventional device (FIG. 1), and the output shaft 51 of the indexing device 50.
It is fixed with bolt 56.

The indexing device 50 described above has a function in which when the input shaft 49 is continuously rotated, the output shaft 51 is intermittently driven and rotated.

The output shaft 51 is a hollow shaft, and a transmission shaft for driving rotation of the nozzle is inserted therethrough.

The nozzle rotation drive shaft in this example is constituted by a double concentric shaft. When implementing the invention,
For example, when the number of n is 3, it is configured to have three concentric axes.

60 is a hollow shaft in this example, and 61 is a rotating shaft inserted into the hollow shaft.

A gear 85 and a gear 80 are fixed to the upper end of the hollow shaft 60 and the rotating shaft 61, respectively, and the timing belt 8
It is constructed so that it can be driven by pulse motors 88 and 83 via motors 6 and 81.

A flange-shaped table 63 is fixed to the lower end of the main shaft 55, and four nozzle holder guides 70 are fixed at equal intervals along the circumference of the table 63.

A bush 74 is rotatably supported by a bearing 73 concentrically with the nozzle holder guide 70 described above.

A tubular nozzle holder 69 is fitted into the rotatable bush 74 so as to be vertically slidable. FIG. 5 is a GG cross section of this part, and 75 is a key that locks the rotation of the bush 74 and the nozzle holder 69 and guides their vertical sliding. 76 is a hollow part of the tubular nozzle holder 69, into which the suction nozzles 5a and 5b are inserted as shown in FIG.
0 biases downward. 92 is a cap that also functions as a spring holder.

The nozzle holder 69 fitted into the nozzle holder guide 70 is urged upward by a compression spring 72, and a lever 78 is provided for pushing down the nozzle holder 69. 79 is the lever 7 above.
This is a cam roller pivoted on the free end of 8.

A gear 77 is externally fitted and fixed onto the bush 74. In detail, as shown in Fig. 2, the suction nozzle 5
The gear 77a is attached to the bush 74 that is engaged with the nozzle holder 69 holding the suction nozzle 5b, and the gear 77 is attached to the bush 74 that corresponds to the suction nozzle 5b.
Install b. Similarly, as shown in FIG. 3, a gear 77c is attached to the bush 74 corresponding to the suction nozzle 5c, and a gear 77d is attached to the bush 74 corresponding to the suction nozzle 5d.

A gear 66 is fitted to the lower end of the hollow shaft 60. These gears 66 are connected to each other as shown in FIG.
Both suction nozzles 5 facing each other with a 180° angle between them
It meshes with gears 77a and 77b that are engaged with gears a and 5b.

Similarly, as shown in FIG. 3, a gear 67 is attached to the lower end of the rotating shaft 61 with a nut 68. Gears 77c and 77d, which are respectively engaged with two suction nozzles 5c and 5d facing each other with an angle of 180 degrees between them, are meshed with the gear 67 described above.

64 is a bearing that supports the hollow shaft 60; 65
is a bush that supports the rotating shaft 61.

As described above, this embodiment is a transmission means that includes one gear attached to a rotary drive shaft and one gear attached to each of two suction nozzles located at symmetrical positions separated by 180 degrees. Configure. Such transmission means are configured in n series.

In this embodiment, the suction nozzles 5a to 5d supported as described above are configured as follows so that they can each be individually communicated with a vacuum source.

2n circumferential grooves are provided on the outer periphery of the main shaft 55. 2n means the number of suction nozzles installed. In this example, 2n = 4 grooves 5
8a to 58d are provided.

As shown in FIG. 2, the groove 58a is connected to the vertical hole 59a,
It is communicated with the suction nozzle 5a via a pipe 62a. Specifically, the pipe 62a is passed through the side wall of the nozzle holder guide 70, and the nozzle holder 6
9, and communicates with the suction nozzle 5a through a horizontal hole 91 bored in the bottom of the circumferential groove and a nozzle holder hollow part 76. Similarly, the grooves 58b to 58d are connected to the vertical holes 59b to 59b, respectively.
d, suction nozzle 5b~ via pipes 62b~d
d.

A sleeve 52 is slidably fitted on the outside of the main shaft 55 so as to cover the grooves 58a to 58d.
Nipples 54a to 8d as means for connecting vacuum pipes are provided at positions opposite to 8a to 8d, and are passed through the cylindrical wall of the sleeve 52 and fixed thereto.

The sleeve 52 is fixed to the casing of the indexing device 50, which is a fixed member, by bolts 53.

In the manner described above, a swivel joint with the number of passages of 2n, in which the sleeve 52 is a fixed outer casing and the main shaft 55 is a rotating shaft, is formed. Its FF cross section is as shown in FIG.

Reference numeral 57 denotes an O-ring provided to maintain airtightness between the grooves 58a to 58d.

As in this embodiment, 2n circumferential grooves 58a to 58d are provided on the outer periphery of the main shaft 55, and ventilation channels (vertical holes 59a to 59d, pipes 62a - d, a horizontal hole 91 and a nozzle holder hollow part 76) are provided, and the sleeve 52 is slidably fitted onto the main shaft 55,
In addition, a sealing means (O ring 57 in this example) is provided to maintain airtightness between each groove 58a to 58d.
By fixing the nipples 54a to 54d through the sleeve so as to face the respective grooves 58a to 58d, vacuum can be individually supplied to each suction nozzle 5a to 5d regardless of the rotation of the main shaft 55, or atmospheric pressure can be supplied to each of the suction nozzles 54a to 5d. Open the suction nozzle to suction and hold the chip part 2.
Since there is no need to provide a vacuum switching mechanism in the rotating member, the structure of the rotating part can be significantly simplified.

The electronic component mounting device configured as described above operates the pulse motors 83 and 88, the index device input shaft 49, and the lever 78 as described below by an automatic control device (not shown) to place the chip component 2 on the board. It can be automatically mounted at a predetermined position on the 8 in a predetermined attitude. That is, when the lever 78 is swung and the cap 92 is pushed down by the cam roller 79, the suction nozzle 5 descends together with the nozzle holder 69, and its tip abuts against the chip component 2. If there are variations in the height of the chip part 2, use the compression spring 9.
0 bends and absorbs variations. After the chip part 2 is suctioned to the tip of the suction nozzle 5, when the lever 78 is swung upward, the suction nozzle 5 is lifted upward by the compression spring 72.

Next, by operating the index device 50, the table 63 is rotated, and after transporting the chip component 2 to the upper surface of the substrate 8 on the XY table 6, the suction nozzle 5 is lowered by swinging the lever 78 in the same manner as during suction. , the chip component 2 is mounted on the board 8.
When installing chip part 2, turn on the vacuum source to the suction nozzle that holds the chip part by suction.
It can be installed by turning it off and opening it to the atmosphere.

In Figure 2, the suction nozzle 5 at position D'
Taking as an example a case where the chip part 2 is sucked by b and the table 63 is rotated to convey it to the E' position, the operation is as follows.

The attracted chip parts are rotated 180 degrees and reach the E' position, and at the same time, the suction nozzle 5a, which finished discharging the chip parts in the previous cycle, moves to the D' position and starts the next cycle. will prepare for.

In order to mount the chip component that has reached the E' position on the board 8 in a desired posture, the pulse motor 88 is activated to rotate the gear 67, and the gear 7 that meshes with it is activated.
The suction nozzle 5b is rotated via the suction nozzle 7b.

When the suction nozzle 5b is rotated as described above,
Along with this rotation, the suction nozzle 5a also rotates by the same amount. However, since there is no chip component in the suction nozzle 5a, the rotation angle is irrelevant. That is, two gears 66 and 67 are installed on the lower surface of the rotary table 63, and the gears 7 facing each other are
7a and 77b mesh with gear 66, and gear 77c
and 77d are meshed with the gear 67, and the two pulse motors 88 and 83 alternately give rotation angles to the chip parts, thereby preventing the rotation angles of other chip parts from accumulating, and the mounting posture of the chip parts can be adjusted. can be controlled directly and arbitrarily.

〔Effect of the invention〕

As explained above, according to the present invention, the mounting posture of chip components can be directly and easily controlled with a simple configuration, and there is no need to provide a vacuum switching mechanism in the mounting device, so the configuration of the rotating part can be changed. It can be done easily.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of a conventional electronic component mounting device. FIG. 2 is a vertical cross-sectional view of one embodiment of the electronic component mounting device of the present invention, FIG. 3 is a vertical cross-sectional view in a direction perpendicular to the cross-section of FIG. 2, and FIG. 4 is a cross-sectional view taken along line FF in FIG. FIG. 5 is a cross-sectional view taken along the line GG. 5, 5a, 5b, 5c, 5d... suction nozzle,
49... Input shaft of the indexing device, 50... Indexing device, 51... Output shaft thereof, 52... Sleeve, 57... O-ring, 58a, 58b, 5
8c, 58d...Groove, 59a, 59b, 59c,
59d... Vertical hole, 60... Hollow shaft, 61... Rotating shaft, 62a, 62b, 62c, 62d... Pipe, 63... Table, 65... Bush, 69
... Nozzle holder, 70 ... Nozzle holder guide, 71 ... Circumferential groove, 72, 90 ... Compression spring,
73...Bearing, 74...Butsuyu, 75...
...Key, 76...Hollow part of nozzle holder, 78...
...Lever, 79...Cam roller, 81, 86...
Timing belt, 83, 88...Pulse motor.

Claims (1)

[Claims] 1. A plurality of suction nozzles are rotatably supported along the circumference on a flange fixed to the lower end of a hollow main shaft that can be rotated, and a plurality of suction nozzles are rotatably supported in the hollow part of the main shaft. An electronic component supporting a dynamic drive shaft, providing a transmission means between the lower end of the nozzle rotation drive shaft and the suction nozzle, and providing means for communicating a vacuum to the suction nozzle. In the mounting device, the number of the plurality of suction nozzles is 2n (however, n is 2 or an integer of 2 or more), the rotation drive shaft is a concentric n-fold axis, and the number of the 2n suction nozzles is A gear is attached to each of the suction nozzles and the n-fold rotating shaft, and one gear is attached to each of the n-fold rotating drive shafts, and two suction nozzles located at symmetrical positions separated by 180 degrees are attached. It constitutes an n-series transmission means having gears attached to each of the nozzles, a groove is provided on the outer periphery of the main shaft, a ventilation path is provided to connect each groove to each suction nozzle, and a sleeve is slid on the main shaft. An electronic component mounting device characterized in that it is provided with sealing means that is movably fitted onto the outside and maintains airtightness between each groove, and vacuum connecting means that penetrates the wall of the sleeve and faces each of the grooves. Device.