JP2536091Y2 - Support mechanism of chip supply reel in automatic mounting device for chip-type electronic components - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic mounting device for mounting a chip-type electronic component (hereinafter simply referred to as a chip) on a printed circuit board. The present invention relates to a support mechanism for rotatably supporting a chip supply reel wound with an attached tape.

[0002]

2. Description of the Related Art A general automatic mounting apparatus of this kind is configured to continuously and releasably attach a chip to a conveyor for transporting a printed circuit board with a mounting surface of the chip facing upward,
A horizontally movable table in which a plurality of cartridges supporting a reel wound with a tape coated with a film thereon are provided at predetermined intervals in a horizontal direction and provided on the table so as to correspond to each reel, By peeling and winding the film, the chip is exposed,
A take-up reel that pulls out the tape, reciprocates between the table and the conveyor, pinches and captures the exposed chip on the tape, and also has a claw for mounting the chip at a predetermined position on a printed circuit board on the conveyor. And a chip mounting arm provided at the lower end. In the automatic mounting apparatus configured as described above, setting data such as a chip mounting position on a printed circuit board and a selection order of various chips is stored in a computer, and a table based on the data is used to shift the table in the horizontal direction each time. To stop at a predetermined position, and stop the conveyor at a predetermined position, and then capture the chip with a claw of a chip mounting arm,
It is configured to be mounted on a printed circuit board on the conveyor side.

As shown in FIGS. 7 and 8, a conventional support mechanism for a chip supply reel 100 used in the automatic mounting device is a resin support rod 102 provided on a cartridge 101.
Is formed so as to have an outer diameter at least smaller than the inner diameter of the center hole 100a so that it can fit into the center hole 100a of the reel 100, The part 103 is formed integrally. In order to support the reel 100 on the cartridge 101, the engaging portion 103 must be passed through and then fitted to the support rod 102.

[0004]

In the above-described conventional example, the outer diameter of the locking piece 103 is at least smaller than the inner diameter of the center hole 100a. The reel 100 may be detached from the cartridge 101 due to the engagement of the reel 100 with the engaging portion 103. Further, the outer diameter of the support rod 102 is required to pass through the locking portion 103 at the front end when the reel 100 is mounted on the cartridge 101.
It must be formed to have a small diameter by 03. Therefore, a large gap is formed between the inner edge of the center hole 100a and the outer periphery of the support rod 102, and each time the table of the automatic mounting device moves and stops in the horizontal direction, or during rotation of the reel 100, Rattling occurs between the support rod 100 and the support rod 102,
02 and the fixed portion of the cartridge 101 are easily damaged.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and to provide a support mechanism for a chip supply reel in an automatic mounting device for chip-type electronic components which solves the problems.

[0006]

In order to achieve the above object, the present invention provides, for example, an outer diameter substantially equal to or slightly smaller than the inner diameter of a center hole 6a of a chip supply reel 6 in an automatic chip mounting apparatus 1. A thin plate-shaped swing washer 17 as a locking piece is rotatably supported on an eccentric shaft 16 provided at a position deviated below the center of the distal end surface 11a of the columnar support rod 11 having , The swing washer 17
Can be displaced into a reel attachment / detachment allowable state in which the locking portion 17b does not protrude radially outward of the distal end surface 11a, and a reel attachment / removal prevention state in which the locking portion 17b protrudes downward radially outward of the distal end surface 11a. On the other hand, the tip surface 11a
Further, a stopper 18 for preventing the swing washer 17 from rotating in the same direction as the reel 6 in the reel attachment / detachment preventing state is provided.

[0007]

According to the present invention constructed as described above, as shown in FIG. 6, the reel mounting and dismounting state in which the oscillating washer 17 as a locking piece does not protrude radially outward of the tip end surface 11a, that is, the oscillating washer 17 is used. 4 and 5, the swinging washer 17 is rotated counterclockwise in the drawing as shown in FIGS. 4 and 5. Arrow)) and the locking portion 17b
Is in a state in which the reel protrudes below the front end surface 11a. In the reel 6 supported by the cartridge 7 in this manner, the locking portion 17b is locked to the periphery of the center hole 6a, and the reel 6 does not detach from the support rod 11 when the automatic mounting device 1 is not driven. Of course, even when the automatic mounting apparatus 1 is driven, the swinging washer 17 that rotates by friction with the reel 6 that rotates in the direction of the arrow in FIG.
However, since the rotation of the reel 6 is prevented by the stopper 18 and the locking portion 17b always keeps the reel attachment / removal prevention state in which the locking portion 17b protrudes below the distal end surface 11a, there is no possibility that the reel 6 will come off.

Therefore, according to the present invention, for example, even if the swinging washer 17 as the locking piece attempts to rotate in the same direction as the reel 6 due to friction with the rotating reel 6, the rotation is prevented by the stopper 18 and the rotation is always stopped. Since the reel attachment / detachment preventing state is maintained, the reel 6 does not accidentally come off the support rod 11. In addition, even if the outer diameter of the support rod 11 is substantially equal to the inner diameter of the center hole 6a of the reel 6, the support rod 1
1 can fit the center hole 6a, and the inner edge of the reel 6 and the support rod 1
1 can be minimized, and when the automatic mounting device 1 is operated, rattling does not occur between the reel 6 and the support rod 11, and the support rod 11 itself or the fixed portion of the support rod 11 and the cartridge 7 is fixed. Hard to break. Further, since the swing washer 17 is formed to be thin, it is possible to arrange a large number of reels 6 in the automatic mounting apparatus by reducing the intervals between the reels 6.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 is a front view of the automatic mounting apparatus, FIG. 2 is a side view of the same, FIG. 3 is a front view of a cartridge with a reel attached, FIG. 4 is a partially enlarged view, and FIG. FIG. 6 is a partially enlarged view of a cartridge in a state where a reel is allowed to be attached / detached, FIG. 7 is a partially enlarged view of a cartridge with a reel attached thereto in a conventional example, and FIG.

As shown in FIGS. 1 to 3, an automatic mounting apparatus 1 to which the present embodiment is applied includes a conveyor 3 on which a printed circuit board 2 having a chip mounting surface facing upward is moved, and a chip 4. Are continuously and releasably attached at regular intervals, and a plurality of cartridges 7... Respectively supporting a plurality of reels 6. Two horizontally movable tables 8, 8 which are continuously provided at predetermined intervals in the horizontal direction, reciprocate between the printed circuit board 2 and the tables 8, 8 and are drawn out of the reels 6 at the tables 8, 8. (Not shown) provided at the lower end with chips 4... On tape 5
And a mounting machine 9 internally provided with a disk (not shown) provided with a chip mounting arm 9a for mounting the chip 4 at a predetermined position on the substrate 2. Things. The cartridges 7 are fixed to the tables 8 and the tape 5 is pulled out from the reels 6 by a necessary amount so that the chips 4 can be easily picked by the claws of the chip mounting arm 9a. A plurality of tape mounting rods 8a... And a plurality of tapes 5 are provided corresponding to the respective reels 6. Are connected in series. Also,
When the chip mounting arm 9a captures the chip 4,
The claw rises so as to be higher than the take-up reel 10, moves to the conveyor 3 side by the rotation of the disc body, and lowers the claw again to mount the chip 4 on the printed circuit board 2. I have. Furthermore, each take-up reel 1
.. Are driven separately, and each film 5a is driven as described above.
And at the same time, pulls out each tape 5 from the reels 6.

In the automatic mounting apparatus 1 configured as described above, setting data such as the mounting position of the chip 4 on the printed circuit board 2 and the selection order of various chips are stored in a computer (not shown) in advance. Each time the tables 8, 8 are moved in the horizontal direction and stopped at a predetermined position by a command signal based on the data, the conveyor 3 is moved and stopped when the printed circuit board 2 reaches the predetermined position. Subsequently, the film 5a is peeled off by the winding operation of the winding reel 10, and the chip 4 exposed on the tape 5 pulled out from the reel 6 is picked up and caught by the claw of the chip mounting arm 9a. Further on,
After standing up, the chip mounting arm 9a moves toward the conveyor 3 by rotation of a disk (not shown), and mounts the chip at a predetermined position on the printed circuit board 2. The tape 5 from which the film 5a has been peeled off and from which the chips 4 have been removed is cut to an appropriate length by a cutting machine (not shown) through the inner end of each of the tape mounting rods 8a. You.

As shown in FIG.
Is a column-shaped support for supporting the reel 6 by rotatably fitting the center hole 6a of the reel 6 with a plate-shaped main body 7a having an upper side and one side (left side in the drawing) bent. A rod 11 and a brake member 12 for preventing the reel 6 from excessively rotating by pressing the periphery of the reel 6 supported by the support rod 11 from the outside. The brake member 12 has a free end 13 having a U-shaped cross section.
a spring 13 for urging the arm 13 with its free end 13a against the periphery of the reel 6 with an appropriate force.
4 The take-up reel 10 is used for the film 5
If the reel 6 rotates excessively when winding a, the tape 5
Draws out more than necessary.

As shown in FIG. 4 to FIG.
The outer diameter of the reel 6 and the inner diameter of the center hole 6a are adjusted so that the reel 6 and the support shaft 11 do not rattle in the fitted state.
Are formed so as to be substantially equal or slightly smaller so as to rotate. The support rod 11 is fixed to the main body 7a of the cartridge 7 by a fixed shaft 15.

As shown in FIG. 4 to FIG.
The circular tip surface 11a has a eccentric shaft 16 provided at a position deviated below the center of the circular tip surface 11a, and a thin plate as a locking piece formed integrally with a supported portion 17a and a locking portion 17b. A pivoting washer 17 is rotatably supported. In the case of the eccentric shaft 16, its axial center point O and the tip surface 11a
The distance to the upper end edge Y is determined by the distance between the axial center point O and the front end surface 11a.
Is provided at a position that is longer than the distance to the lower end edge X. The pivoted support portion 17a of the swing washer 17 includes:
The length m from the fulcrum supported by the eccentric shaft 16 (which coincides with the axis O) to the top is equal to the distance between the axis O and the lower edge X of the front end surface 11a. And is formed in a substantially semicircular shape having the length m as a radius. Further, the locking portion 17b of the swing washer 17 has a length n from the pivoted fulcrum to the top thereof such that the length n is equal to the distance between the axis center point O and the upper edge Y of the tip end surface 11a.
Further, it is formed in a semicircular shape having the same arc edge as the arc shape of the edge of the distal end face 11a. Further, in the swing washer 17 having such a shape, the pivoted support portion 17a and the locking portion 1
7b with a pair of cutouts 17 sandwiching the pivoted fulcrum
c and 17d are formed.

As shown in FIG. 4 to FIG.
A stopper 18 protrudes from the front end surface 11a of the front end 11a at a position corresponding to one of the cutouts 17c and 17d (near the right edge in FIGS. 4 and 6). The stopper 18 allows the swinging washer 17 to rotate in the same direction as the reel 6 due to friction received from the rotating reel 6 when the locking portion 17b protrudes below the distal end surface 11a (FIGS. 4 and 6).
(Upward, counterclockwise rotation). By providing the stopper 18, in a reel attachment / detachment preventing state in which the swing washer 17 protrudes below the front end surface 11 a, the inner edge of one notch 17 c abuts the stopper 18, and beyond that, the same direction as the reel 6. In the state where the swing washer 17 does not protrude outward in the radial direction of the distal end face 11a, that is, in the state where the reel detachment is permitted, that is, in the state where the locking portion 17b is located on the upper side, the inner edge of the other cutout portion 17d The stopper 6 is brought into contact with the stopper 18, and thereafter, the reel 6 is prevented from rotating in the opposite direction (clockwise rotation in FIGS. 4 and 6). Therefore, during the rotation of the reel 6, the swinging washer 17 keeps the reel detachment preventing state protruding below the front end surface 11a, while pressing the other notch 17d against the stopper 18 when attaching and detaching the reel 6. When the reel mounting / dismounting state is set, the center hole 6a can be fitted to the support rod 11.

As shown in FIG. 4 and FIG.
1 engages a projection 20 provided at the base end of the support rod 11 with a through hole 19 provided in the main body 7a of the cartridge 7;
The screw 22 is screwed into a screw hole 21 that reaches the eccentric shaft 16 from the outer peripheral surface thereof so as not to rotate with respect to the eccentric shaft 16.

Next, the operation of the above embodiment will be described. First, the center hole 6a is formed in the support rod 11 in the reel attachment / detachment allowable state (see FIG. 6) in which the locking portion 17b of the swing washer 17 is positioned on the upper side. After fitting, the locking portion 17
Rotate the swing washer 17 so that b projects downward,
Displace (see FIGS. 1, 4 and 5). in this way,
In a state in which the locking portion 17b protrudes downward, the peripheral edge of the center hole 6a locks to the reel 6 so that the reel 6 does not come off the support rod 11. The swing washer 17 is
Even if an attempt is made to rotate in the same direction as the reel 6 due to friction with the rotating reel 6, the rotation is prevented by the stopper 18 and the same state is always maintained, so that the reel 6 does not unexpectedly separate from the support rod 11. . The automatic mounting device 1 is configured by attaching the cartridges 7 supporting the reels 6 to the outer ends of the tape mounting rods 8a in this manner, and waiting for a command from the computer. Then, the table 8 is moved to stop at a predetermined position, and then the film 4a is peeled off and the exposed chip 4 is picked up and caught by a claw of a chip mounting arm 9a, and the conveyor 3 stopped at a predetermined position. It is mounted on the printed circuit board 2 on the board.

As described above, in the above embodiment, even if the swinging washer 17 serving as the locking piece attempts to rotate in the rotation direction of the reel 6 due to friction with the rotating reel 6, the rotation is prevented by the stopper 18, and the rotation is always prevented. Since the reel attachment / detachment preventing state is maintained, the reel 6 does not accidentally come off the support rod 11. In addition, even if the outer diameter of the support rod 11 is substantially equal to the inner diameter of the center hole 6a of the reel 6, the center hole 6a can be fitted to the support rod 11, and the gap between the inner edge of the reel 6 and the outer periphery of the support rod 11 can be reduced. When the automatic mounting apparatus 1 is operated, no rattling occurs between the reel 6 and the support rod 11, and the support rod 11 itself or a fixed portion between the support rod 11 and the cartridge 7 is hardly damaged. Also, swing washer 1
7 are formed thin, the distance between the reels 6.
.. Can be arranged in a large number.

The present invention is not limited to the embodiment described above.
1a, a state in which the reel does not protrude outward in the radial direction,
The swinging washer 17 in the above embodiment may be different from the swinging washer 17 as long as it can be appropriately displaced to a reel attachment / detachment preventing state protruding radially outward of the tip end surface 11a. Is from the center of the tip surface 11a.
It may be biased in a direction other than the downward direction, for example, in the lateral direction. In this case, it is necessary to change the position of the stopper 18 to a position different from that of the above embodiment.

[0020]

As described above, according to the present invention, even if the locking piece attempts to rotate in the same direction as the reel due to friction with the rotating reel, the locking piece is prevented by the stopper, and the reel attachment / removal prevention state is always maintained. Therefore, not only can the reel be reliably supported, but even if the outer diameter of the support rod is substantially equal to the inner diameter of the center hole of the reel, the center hole can be easily fitted to the support rod. It is possible to minimize the gap on the outer circumference of the support rod, to prevent rattling between the reel and the support rod when the automatic mounting device is operating, and it is difficult to damage the support rod itself or the fixed part of the support rod and the cartridge,
Since the locking piece can be formed thin, it is possible to provide an effect that it is possible to reduce the interval between the reels and arrange a large number of reels on the table of the automatic mounting device.

[Brief description of the drawings]

FIG. 1 is a front view of an automatic mounting device.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the cartridge with a reel attached.

FIG. 4 is a partially enlarged view of FIG.

FIG. 5 is a partially enlarged longitudinal sectional view of the same.

FIG. 6 is a partially enlarged view of a cartridge in a state in which a reel can be attached and detached.

FIG. 7 is a partially enlarged view of a cartridge with a reel attached thereto in a conventional example.

FIG. 8 is a partially enlarged longitudinal sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic mounting apparatus 2 Printed circuit board 4 Chip 5 Tape 6 Reel 7 Cartridge 8 Table 11 Support rod 16 Eccentric shaft 17 Swing washer 17a Shaft supported part 17b Locking part 18 Stopper

Claims (1)

(57) [Scope of request for utility model registration] 1. A support mechanism for a chip supply reel in an automatic mounting device for mounting chip-type electronic components on a printed circuit board, wherein the support mechanism is provided on a tip end surface of a support rod rotatably fitted in a center hole of the reel. A plate-shaped locking piece is rotatably supported on the eccentric shaft, so that the locking piece does not protrude outward in the radial direction of the distal end surface, and the reel is allowed to be attached and detached in the radially outward direction of the distal end surface. A stopper is provided on the front end surface, which can be displaced to a projecting reel attachment / removal prevention state, and which can prevent the locking piece from rotating in the same direction as the reel in the reel attachment / removal prevention state. A support mechanism for a chip supply reel in an automatic mounting device for chip-type electronic components.