JP3758937B2 - Electronic component feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic component supply device that enables electronic components to be picked up by intermittently feeding an electronic component mounted on a carrier tape to a pickup position and opening a shutter provided at the pickup position.
[0002]
[Prior art]
Conventionally, as this kind of electronic component supply apparatus, the one described in JP-A-5-335785 is known. This electronic component supply device supplies electronic components one by one mounted on a carrier tape to the mounting device main body, a tape feeding mechanism that intermittently feeds the carrier tape and sends the electronic components to the pickup position, and this feed. A cover tape take-up mechanism that peels off the cover tape of the carrier tape prior to insertion, and a shutter mechanism that enables the electronic component to be picked up by opening the upper side of the electronic component sent to the pickup position. These mechanisms operate in conjunction with each other by receiving power from the mounting apparatus body.
That is, when the carrier tape is intermittently fed once by the tape feeding mechanism, the cover tape winding mechanism peels (peels) the cover tape for one intermittent feeding in synchronism with this. When the tape feeding mechanism and the cover tape take-up mechanism are stopped, the shutter mechanism is operated to open the shutter for the electronic component fed to the pickup position. When the shutter is opened, electronic components are picked up (sucked), and then the shutter is closed.
And in this prior art, the shutter mechanism which can change a shutter stroke is mounted with respect to two types of electronic component supply apparatuses from which the intermittent feed pitch of a carrier tape differs, and the shutter mechanism can be shared. Specifically, for carrier tapes with different mounting intervals (arrangement pitches) of electronic components based on the size of the electronic components, an electronic component supply device with an intermittent feed pitch set to 2 mm and an electronic component supply device with a setting of 4 mm On the other hand, a shutter mechanism that can adjust the shutter stroke length according to the size of the electronic component using an eccentric screw is mounted.
[0003]
[Problems to be solved by the invention]
In such a conventional electronic component supply apparatus, although the shutter mechanism can be shared, the intermittent feeding pitch of the carrier tape is different, so that there is a problem that the tape feeding mechanism and the cover tape winding mechanism cannot be shared. That is, the intermittent feeding pitch of the carrier tape cannot be varied with a single electronic component supply device.
By the way, if the intermittent feed pitch is long and the intermittent feed is performed a plurality of times, the electronic component can be appropriately fed to the pickup position without changing the intermittent feed pitch. FIG. 5 specifically shows this. As shown in the figure, for a large electronic component A requiring 24 mm feed, a 12 mm intermittent feed is performed twice with respect to a normal electronic component (FIG. (A)) A which is intermittent feed of 12 mm (A). This can be appropriately sent to the pickup position S. However, since the stroke of the shutter B corresponding to the normal electronic component A is 8 mm ((a) in the figure), when the electronic component A is large, the electronic component A is pressed even when the shutter B is “open”. Is maintained, and pickup becomes impossible ((b) in the figure). Conversely, if the stroke of the shutter B is set to 14 mm in accordance with the large electronic component A, the electronic component A is not pressed even when the shutter B is “closed” when the shutter B is “normal” (same as above). Figure (c)).
[0004]
An object of the present invention is to provide an electronic component supply apparatus that can appropriately feed electronic components having different feed pitches to a pickup position and can appropriately pick them up.
[0005]
[Means for Solving the Problems]
The electronic component supply apparatus according to the present invention is capable of moving forward and backward through a tape feeding mechanism that intermittently feeds a carrier tape carrying electronic components to a pickup position, and a link that rotates a shutter provided at the pickup position by driving a shutter drive source. The shutter mechanism that opens and closes the upper part of the carrier tape to enable pickup of electronic components, and the case where the next pickup electronic component is sent to the pickup position with one intermittent feed and the case with multiple intermittent feeds And a controller that can control the tape feeding mechanism, and a stopper that can regulate the rotation of the link and change its position, and a stroke adjustment mechanism that can adjust the length of the shutter forward and backward according to the size of the electronic component. It is characterized by having.
[0006]
According to this configuration, for example, a relatively small electronic component is fed to the pickup position by one intermittent feed, and a relatively large electronic component is fed to the pickup position by a plurality of intermittent feeds. At that time, the stroke of the shutter is adjusted in accordance with the electronic components of large and small sizes by a stroke adjusting mechanism provided with a stopper that regulates the rotation of the link and can adjust its position . In this way, the large and small electronic components can be appropriately fed to the pickup position without changing the intermittent feeding pitch by the tape feeding mechanism. Further, by adjusting the forward / backward stroke of the shutter, the shutter functions such as prevention of jumping out and allowance of pickup are not impaired for each of the large and small electronic components.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electronic component mounting apparatus to which an electronic component supply apparatus according to an embodiment of the present invention is applied will be described with reference to the accompanying drawings. This electronic component mounting device is a so-called multi-function chip mounter, and various electronic components such as circuit component components such as chip capacitors and chip resistors, grid components such as BGA, and multi-lead components such as QFP and SOP are used as a substrate. It can be implemented.
[0008]
FIG. 1 is a plan view of an electronic component mounting apparatus. As shown in FIG. 1, the electronic component mounting apparatus 1 includes a machine base 2, a conveyor unit 3 extending in the left-right direction at the center of the machine base 2, and Two sets of component mounting portions 4 and 4 and two sets of component supply portions 5 and 5 are provided respectively at the front portion (lower side in the drawing) and the rear portion (upper side in the drawing) of the machine base 2. A plurality of tape cassettes 6 that are electronic component supply devices are detachably incorporated in the component supply unit 5.
[0009]
The conveyor unit 3 includes a central set table 8, a left carry-in conveyance path 9, and a right carry-out conveyance path 10. The substrate P is supplied from the carry-in conveyance path 9 to the set table 8, and is set stationary and at a predetermined height so as to receive mounting of electronic components on the set table 8. Then, the substrate P on which the electronic component has been mounted is discharged from the set table 8 through the carry-out conveyance path 10.
[0010]
Each component mounting portion 4 is provided with an XY stage 12 on which a head unit 13 is movably mounted, as well as a component recognition camera 14 and a nozzle stocker 15. The head unit 13 is equipped with two mounting heads 16 and 16 for sucking and mounting electronic components and one substrate recognition camera 17 for recognizing the substrate P. Normally, the XY stages 12 and 12 of both component mounting portions 4 and 4 are alternately operated.
[0011]
Each component supply unit 5 includes a number of tape cassettes (electronic component supply devices) 6 on a unit base 19 that are detachable side by side. Each tape cassette 6 is equipped with a carrier tape containing a large number of electronic components at regular intervals. By intermittently feeding the carrier tape, one electronic component is transferred from the tip of the tape cassette 6 to the component mounting portion 4. Supplied one by one. In the electronic component mounting apparatus 1, relatively small electronic components such as surface mount components are mainly supplied from the tape cassette 6, and relatively large electronic components are mainly supplied from a tray-type component supply device (not shown). .
[0012]
In the operation of the electronic component mounting apparatus 1 based on NC data, first, the XY stage 12 is driven, the head unit 13 is made to face the tape cassette 6, the mounting head 16 is lowered, and the suction nozzle 18 uses the desired electronic component. Adsorb (pick up). Subsequently, after the mounting head 16 is raised, the electronic component is moved to a position directly above the component recognition camera 14 to recognize the suction posture and perform position correction. Next, the mounting head 16 is moved to the position of the substrate P, the substrate recognition camera 17 recognizes (corrects) the reference position of the substrate P, and then the electronic component is mounted on the substrate P. Note that the XY stage 12 of the embodiment is equipped with two mounting heads (suction nozzles 18) 16 and 16, which continuously sucks two electronic components and mounts them on the substrate P continuously. It is also possible to do. Although not shown, when a mounting head having a plurality of suction nozzles is mounted, a plurality of electronic components can be continuously suctioned and mounted.
[0013]
As shown in FIG. 2, the tape cassette 6 includes an apparatus frame 21, a carrier tape reel (not shown) rotatably mounted on the apparatus frame 21, and a carrier tape C fed out from the carrier tape reel. And the tape feed mechanism 22 that intermittently feeds to the pickup position S of A, the cover tape winding mechanism 23 that peels off the cover tape Ca of the carrier tape C before the pickup position S and winds the cover tape Ca, and the pickup The shutter mechanism 24 that enables the electronic component A to be picked up by releasing the upper side of the electronic component A that has been sent to the position S, and the drive serving as a drive source for the tape feeding mechanism 22, the cover tape winding mechanism 23, and the shutter mechanism 24. It comprises a cylinder 25 and a controller 26 that controls the drive cylinder 25. The controller 26 is incorporated in a control system that performs overall control of the entire electronic component mounting apparatus 1.
[0014]
The carrier tape C on which the electronic component A is mounted is provided in a state of being wound around a carrier tape reel. The carrier tape C fed out from the carrier tape reel is fed to the pickup position S so as to dive under the suppressor 27 disposed in the tape path before the pickup position S. A portion around the pickup position S of the suppressor 27 is notched, and a shutter 61 of a shutter mechanism 24 described later is incorporated in this portion. Further, a slit 28 is formed in the suppressor 27 located in front of the shutter 61, and the cover tape Ca of the carrier tape C is peeled off from the slit 28, and a cover tape reel of the cover tape winding mechanism 23 described later. 51 is wound up. That is, the electronic component A mounted on the carrier tape C faces the shutter 61 provided at the pickup position S in a state where the cover tape Ca is peeled off.
[0015]
The drive cylinder 25 is swingably supported by the apparatus frame 21 at the tail end portion of the cylinder body 31, and a tape feeding mechanism 22, a cover tape winding mechanism 23, and a shutter mechanism are provided at the tip of the piston rod 32. A transmission plate 33 for transmitting power to 24 is fixed. As the piston rod 32 moves back and forth, the transmission plate 33 moves back and forth while swinging, and in its backward movement (pulling operation), the carrier tape C is fed by the tape feeding mechanism 22 and the cover tape Ca is wound by the cover tape winding mechanism 23. And the closing operation of the shutter 61 by the shutter mechanism 24 is performed, and the opening operation of the shutter 61 by the shutter mechanism 24 is performed by the forward operation, and the drive cylinder 25 also operates as a drive source of the shutter mechanism 24 .
[0016]
The tape feed mechanism 22 meshes with a feed hole Cb formed in the carrier tape C (see FIGS. 3 and 4), and a sprocket 41 that feeds the feed hole Cb and is fixed so as to overlap the sprocket 41 and coaxially disposed. 42, a feed claw 43 that meshes with the claw wheel 42 and intermittently rotates the claw wheel 42, and a swing lever 44 that rotatably supports the feed claw 43 and that is swingable coaxially with the claw wheel 42. have. The transmission plate 33 is rotatably connected to the end of the swing lever 44, and the swing lever 44 swings as the transmission plate 33 advances and retreats. As a result, the ratchet wheel 42 rotates intermittently. When the ratchet wheel 42 rotates intermittently, the sprocket 41 rotates intermittently at the same time, and the carrier tape C is intermittently fed.
[0017]
The cover tape take-up mechanism 23 includes a cover tape reel 51 that is rotatably attached to the apparatus frame 21, a one-way clutch 53 that is incorporated in a shaft portion 52 of the cover tape reel 51, and a cover tape reel via the one-way clutch 53. A feed lever 54 that intermittently rotates 51 in one direction, and a connecting arm 55 that connects the feed lever 54 and the transmission plate 33 are provided. One end of the connecting arm 55 is fixed to the transmission plate 33, extends rearward in parallel with the drive cylinder 25, and is rotatably attached to the feed lever 54. When the feed lever 54 swings through the connecting arm 55 as the transmission plate 33 advances and retracts, the cover tape reel 51 is intermittently moved in one direction (winding direction) due to the interaction between the feed stopper (not shown) and the one-way clutch 53. Rotate. Thereby, the cover tape Ca peeled off from the carrier tape C is wound around the cover tape reel 51 without causing slack.
[0018]
The shutter mechanism 24 includes a shutter 61 slidably provided at the end of the holding piece 27 a of the suppressor 27, a connecting link 62 extending from the tail end of the shutter 61, and an upper end rotating to the tail end of the connecting link 62. A rotating link 63 that is freely connected, an operating pin 64 that is attached to the lower end of the connecting arm 55 and contacts the rotating link 63, and a coil that urges the rotating link 63 in a direction to open the shutter 61. And a spring 65. In this case, the rotation link 63 is rotatably attached to the apparatus frame 21 at an intermediate position in the longitudinal direction, and the coil spring 65 is stretched between the lower end portion of the rotation link 63 and the apparatus frame 21. ing.
[0019]
The shutter 61 moves forward and backward (opens and closes) using the pin 29 as a guide by engaging a pair of pins 29, 29 provided on the side surface of the suppressor 27, and the carrier tape C facing the pickup position S. Open and close the top. That is, the shutter 61 holds the electronic component A sent to the pickup position S in a state where it is moved to the closed position so as not to jump out from the housing portion (see FIGS. 3 and 4) Cc of the carrier tape C. In a state where the electronic component A is moved to the open position, the electronic component A is retracted from the upper side so that the pickup can be performed.
[0020]
When the connecting arm 55 moves rearward along with the winding operation of the cover tape winding mechanism 23, the operating pin 64 rotates the rotating link 63 against the coil spring 65, and the shutter 61 is connected via the connecting link 62. Is moved forward (blocking operation). On the contrary, when the connecting arm 55 moves forward, the coil spring 65 rotates the rotating link 63 in the reverse direction, and the shutter 61 is moved backward (opening operation) via the connecting link 62.
[0021]
On the other hand, a stroke adjustment mechanism 30 that adjusts the forward / backward stroke of the shutter 61 is disposed near the upper end of the rotation link 63. The stroke adjusting mechanism 30 includes a long hole 71 formed in a side surface of the suppressor 27 and extending in the horizontal direction (shutter advance / retreat direction), and a stopper screw 72 screwed into the long hole 71. By fastening the stopper screw 72 at an appropriate position in the extending direction of the long hole 71, the open end position of the shutter 61 is restricted, and the forward / backward stroke of the shutter 61 is adjusted.
[0022]
Here, the mutual timings of feeding the carrier tape C, winding the cover tape Ca, and opening and closing the shutter 61 will be described. When the carrier tape C is intermittently fed once by the tape feeding mechanism 22, the cover tape winding mechanism 23 winds the cover tape Ca while peeling (peeling) the cover tape Ca for one intermittent feeding in synchronism with this. Subsequently, when the tape feeding mechanism 22 and the cover tape winding mechanism 23 are stopped (idling operation), the shutter mechanism 24 is opened, and the shutter 61 is opened with respect to the electronic component A fed to the pickup position S. When the shutter 61 is opened, the electronic head A is picked up (sucked) by the mounting head 16, and then the shutter 61 is closed. At this time, the intermittent feeding of the carrier tape C and the winding of the cover tape Ca are performed simultaneously. And done.
[0023]
By the way, this tape cassette 6 is configured to be able to mount a carrier tape C having an intermittent feed pitch of 12 mm and a carrier tape C having a thickness of 24 mm. Specifically, the small electronic components A can be fed to the pickup position S one by one at a feed pitch of 12 mm, and the large electronic components A are fed to the pickup position S one by one by feeding twice at a feed pitch of 12 mm. Be able to. Hereinafter, this state will be described in detail with reference to FIG. 3 and FIG.
[0024]
As shown in FIG. 3, in the small electronic component A, the next pickup electronic component A is sent by 12 mm (one intermittent feed) and sent to the pickup position S (FIG. 3A), and the shutter 61 is opened to raise. Picking is possible ((b) and (c) in the figure). In this case, the shutter stroke (advance / retreat stroke) is set to 8 mm by the stroke adjusting mechanism 30, and the electronic component A is reliably prevented from popping out in the closed state and up picked up in the open state. Interference with the nozzle 18 is reliably prevented.
[0025]
On the other hand, as shown in FIG. 4, in the large electronic component A, the next pickup electronic component A is intermittently fed twice (12 mm × 2 = 24 mm) and sent to the pickup position S (FIG. 4 (a) and FIG. b)) The shutter 61 is opened to allow up-picking (FIGS. (c) and (d)). In this case, the shutter stroke is set to 14 mm so that the upper side of the electronic component A can be completely opened. In the case of a large electronic component A, the controller 26 controls the mounting head 16 so that the pickup is performed once for two intermittent feeds.
[0026]
As described above, in this embodiment, the small electronic component A is fed to the pickup position S by normal intermittent feed, and the large electronic component A is fed to the pickup position S by performing this intermittent feed twice. I have to. Therefore, the large and small electronic components A and A can be appropriately fed to the pickup position S without changing the structures of the tape feeding mechanism 22 and the cover tape winding mechanism 23. At the same time, the stroke adjusting mechanism 30 can appropriately operate the shutter 61 in accordance with the large and small electronic components A and A, respectively.
[0027]
In the embodiment, it is possible to handle two types of electronic components whose intermittent feed pitch is a half of the relationship. However, as long as the electronic components have an intermittent feed pitch of an integral multiple, a plurality of types of electronic components are used. It is possible to handle. In addition, if the mounting position in the radial direction between the swing lever and the transmission plate in the tape feeding mechanism and the mounting position in the radial direction between the feed lever and the connecting arm in the cover tape take-up mechanism can be varied, intermittent The feed pitch can also be changed, and a plurality of types of electronic components can be handled.
[0028]
【The invention's effect】
As described above, according to the electronic component supply device of the present invention, a relatively large electronic component is fed to the pickup position by a plurality of intermittent feeds, so that it is large and small without changing the feed pitch of intermittent feeds. Each electronic component can be appropriately fed to the pickup position. Further, by adjusting the forward / backward stroke of the shutter by a stroke adjusting mechanism provided with a stopper that can regulate the rotation of the link and adjust the position thereof, it is possible to appropriately pick up the large and small electronic components. Therefore, not only the shutter mechanism but also the tape feeding mechanism can be shared.
[Brief description of the drawings]
FIG. 1 is a plan view of an electronic component mounting apparatus equipped with an electronic component supply apparatus according to an embodiment of the present invention.
FIG. 2 is an enlarged side view of the front portion of the tape cassette (electronic component supply device) according to the embodiment.
FIG. 3 is an explanatory diagram illustrating intermittent feeding and shutter opening / closing operations for small electronic components.
FIG. 4 is an explanatory diagram illustrating intermittent feeding and shutter opening / closing operation for a large electronic component.
FIG. 5 is an explanatory diagram showing intermittent feeding of electronic components and opening / closing operation of a shutter assumed in a conventional electronic component supply apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 5 Component supply part 6 Tape cassette 16 Mounting head 18 Adsorption nozzle 22 Tape feed mechanism 23 Cover tape winding mechanism 24 Shutter mechanism 25 Drive cylinder 26 Controller 27 Suppressor 30 Stroke adjustment mechanism 61 Shutter 63 Rotation link 64 Operation Pin 65 Coil spring 71 Long hole 72 Stopper screw A Electronic component C Carrier tape Ca Cover tape S Pickup position

Claims (1)

A tape feed mechanism that intermittently feeds the carrier tape carrying electronic components to the pickup position;
A shutter mechanism that opens and closes a shutter provided at a pickup position so as to freely advance and retreat via a link that rotates by driving a shutter drive source, and opens an upper portion of the carrier tape to enable pickup of an electronic component;
A controller capable of controlling the tape feeding mechanism in a case where the next pickup electronic component is fed to the pickup position by one intermittent feed and a case in which the next pickup electronic component is fed by a plurality of intermittent feeds;
A stopper that can change the position of the link by restricting the rotation of the link; and a stroke adjusting mechanism that can adjust the length of the shutter in accordance with the size of the electronic component. Electronic component supply device.

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