JP2962172B2 - Tape feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape feeder provided in an electronic component mounting apparatus for mounting a chip on a substrate.

[0002]

2. Description of the Related Art A tape feeder has been widely used as a parts feeder provided in an electronic component mounting apparatus for mounting a chip on a substrate. Hereinafter, a conventional tape feeder will be described.

FIG. 6 is a side view of a conventional tape feeder. Reference numeral 1 denotes a base, on which a base 2 is mounted. 3 is a fixing bolt. The pedestal 1 is mounted on a table (not shown). A supply reel (not shown) is mounted behind the base 2, and the tape 4 fed from the supply reel is pitch-fed to the left on the upper surface of the base 2 (see arrow a). Although not shown, chips are housed in pockets formed on the tape 4 at a pitch.

[0004] At the tip of the base 2, a pitch feed portion for the tape 4 described below is provided. That is, reference numeral 11 denotes a sprocket, which rotates in a counterclockwise direction about the rotation shaft 12 (arrow b) to feed the tape 4 tuned to the sprocket at a pitch. A ratchet wheel 13 is provided coaxially with the sprocket 11. This ratchet car 1
3 includes a feed claw 14 for rotating the pitch,
A reverse rotation preventing claw 15 for preventing the clockwise rotation from being reversely engaged is engaged.

[0005] A bracket 20 is erected on the base 2. A take-up reel 21 has a rotating shaft 23 mounted on a bracket 20.
It is attached to the shaft. Reference numeral 22 denotes a ratchet gear integrally formed on the side surface of the reel 21. Reference numeral 24 denotes a one-way clutch provided on the rotating shaft 23,
Only in the clockwise direction, that is, in the winding direction of the cover tape 4a (arrow c). 25 is a take-up reel 21
Is a take-up lever for rotating the roller by a pitch, and a roller 26 is axially mounted on the end of the take-up lever. The take-up lever 25 is mounted on the rotating shaft 23 coaxially with the take-up reel 21. Reference numeral 25a denotes an arm branched from the winding lever 25. An engagement claw 27 is axially mounted on the arm 25a via a pin 25b. The engagement claws 27 are resiliently repelled upward by a spring 28. Reference numeral 29 denotes a U-shaped guide member disposed on the peripheral surface of the take-up reel 21 and connected to the engaging claw 27 by a pin 30.

[0006] A frame 40 is provided between the sprocket 11 and the take-up reel 21. This frame 40
A rocking member 41 is rotatably mounted on a shaft by a pin 42. The lower part of the swing member 41 is provided with a first link member 43.
And a second link member 44 connected to the rotary shaft 12 of the pitch feeder described above. 45 and 46 are connecting pins. A spring 47 is provided at the lower end of the swing member 41.
The rocking member 41 is urged counterclockwise about the pin 42 by the spring force. Reference numeral 48 denotes a stopper that defines a rotation limit of the swing member 41.

The swing member 41 is provided with a first arm 41a protruding forward and a second arm 41b extending rearward. A roller 50 is mounted on the distal end of the first arm 41a. The second arm 41b is connected to the lever 25 via a spring 51. Normally, the roller 26 is pressed against the lower surface of the second arm 41b by the spring force of the spring 51 in the contracting direction.

A shutter 52 is provided on the upper surface of the tip of the base 2. A peeling claw 53 is provided in front of the shutter 52.
Is provided. The cover tape 4a stuck on the upper surface of the tape 4 is folded back by the peeling claw 53 so that the tape 4
And is wound on the take-up reel 21. A pin 54 protrudes from the tip of the second link member 44. This pin 54 is engaged with the shutter 52. When the second link member 44 swings about the rotation shaft 12,
The shutter 52 is pulled by the pin 54 and slides in the front-rear direction (see arrow d). Reference numeral 55 denotes a guide hole opened on the side surface of the shutter 52, and reference numeral 56 denotes a guide pin which stands on the base 2 and fits into the guide hole 55.
Slides along this guide pin 56 in the direction of arrow d. Reference numeral 57 denotes a cover plate attached to the tip of the base 2.

Reference numeral 60 denotes a head on the side of an electronic component mounting apparatus (not shown). The head 60 has a nozzle 61 for vacuum-adsorbing and picking up the chip C. At all times,
Although the shutter 52 is retracted to the right, when the tape 4 is sent to the left, the chip C moves to the right together with the tape 4 and the chip C is ejected from the pocket of the tape 4 from which the cover tape 4a has been peeled off. I try not to.

Reference numeral 62 denotes a pressing rod on the electronic component mounting apparatus side. When the pressing rod 62 descends and presses the roller 50 of the first arm 41a downward, the swinging member 41 swings clockwise (arrow e) (see the swinging member 41 indicated by a chain line). Then, the first link member 43 and the second link member 44 oscillate, the sprocket 11 rotates in the pitch direction in the direction of arrow b, and the tape 4 tuned to the sprocket 11 is pitch-fed in the direction of arrow a.

When the swinging member 41 swings in the direction of arrow e, the take-up lever 25 swings in the direction of arrow f drawn by the spring 51, whereby the take-up reel 21 rotates in the pitch direction of arrow c. Peel off the cover tape 4a
Take up while peeling from 3. Here, take-up reel 2
1 is set slightly larger than the pitch feed amount of the tape 4, and therefore the take-up reel 21
Winds up while strongly pulling the cover tape 4a.

Next, the pressing rod 62 moves up. Then, the swing member 44 rotates clockwise (arrow g) by the spring force of the spring 47, and returns to the original position indicated by the solid line in FIG. At this time, the second arm 41b is
Collide with At the same time, the first link member 43 and the second link member 44 also swing in the opposite direction to return to the original position, the shutter 52 retreats rightward, and the pickup position P is opened. Then, the nozzle 61 of the head 60 moves up and down, vacuum-adsorbs and picks up the chip C stored in the pocket of the tape 4, and transfers it to the substrate (not shown). Therefore, the above operation is repeated by the pressing rod 62 repeatedly performing up and down operations, and the chips C stored in the tape 4 are successively picked up by the nozzles 61 of the head 60 while the tape 4 is fed on the base 2 at a pitch. And mounted on a substrate.

[0013]

According to the above-mentioned conventional tape feeder, there is an advantage that the tape 4 can be fed at a high speed at a high pitch, which is extremely advantageous for high-speed mounting of chips. As described above, the parts feeder has been frequently used. However, the conventional tape feeder has the following problems.

That is, in the tape feeder, when the pressing rod 62 moves up and down, the swing member 41 is swung to feed the pitch of the tape 4, open and close the shutter 52, and take up the take-up reel 21. When the swing member 41 rotates clockwise (arrow g) from the position shown by the dashed line in FIG. 6 and returns to the original position shown by the solid line, the springs of the springs 47 and 51 are moved. The lower surface of the second arm 41b strongly collides with the roller 26 by the force, and the base 2 vibrates due to the impact. However, at this time, since the shutter 52 is retracted to open the upper surface of the tape 4 at the pickup position P, there is a problem that the chip C easily jumps out of the pocket of the tape 4 due to this vibration. When the chip C jumps out of the pocket in this way, the pocket becomes empty, and the nozzle 61 cannot pick up the chip C.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape feeder capable of eliminating swinging due to tape pitch feed and eliminating chip jump.

[0016]

According to the present invention, a take-up lever for rotating a take-up reel at a pitch is provided.
The first spring is connected to the swing member via a first spring, and the base is connected to the base via a second spring. The torque of the take-up reel is reduced by the spring force of the first spring and the second spring. This is to absorb fluctuations.

[0017]

According to the above construction, it is possible to eliminate the occurrence of an impact when the swing member swings, and to prevent the chip from jumping out of the tape pocket. In addition, fluctuations in the torque of the take-up reel caused by fluctuations in the diameter of the cover tape wound on the take-up reel can be absorbed, and the cover tape can be stably wound on the take-up reel by a fixed amount.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a tape feeder according to an embodiment of the present invention, FIG. 2 is a partial side view of the same, FIGS. 3 and 4 are partial side views during the same operation, and FIG. 5 is an explanatory view of the same torque fluctuation absorption. .

First, the overall structure of the tape feeder will be described with reference to FIGS. The structure of the tape feeder of the present embodiment is the same as that of the above-described conventional example except for the swing mechanism of the swing member. Only the swing mechanism and the supply reel will be described.

In FIG. 1, the pedestal 1 is detachably mounted on a table 70. A frame 71 is mounted on a rear portion of the base 2, and a supply reel 72 is held on the frame 71. Reference numeral 71a is a handle for handling the tape feeder. A lever 73 is provided at the rear of the base 2. A fixed claw 74 having a toggle mechanism is attached to a lower portion of the lever 73. Lever 7
3 is swung in the front-rear direction, and the fixed claw 74 is
The tape feeder is fixed on the table 70 by pressing the tape feeder against the rear end tapered surface of the groove 75 formed in the groove 70.

Next, the swing mechanism of the swing member will be described with reference to FIG. The swing member 80 is attached to the frame 40 by the rotating shaft 42.
Is rotatably mounted on the shaft. The swing member 80 is urged counterclockwise by a spring 47. 48 is a stopper. The swing member 80 is connected via a first link member 43 and a second link member 44 to a pitch feed portion including the sprocket 11, the ratchet wheel 13, and the like.

An arm 80a extending upward is provided on the rear side of the swing member 80. A take-up lever 82 is provided coaxially with the take-up reel 21. The upper end of the arm and the leading end of the winding lever 82 are connected by a first spring 83, and the leading end of the winding lever 82 and the bracket 20 are connected by a second spring 84. Accordingly, the take-up lever 82 is urged upward by the first spring 83 and urged downward by the second spring 84 to maintain an intermediate position where the take-up lever 82 does not contact the arm 80a. A roller 50 is provided behind the rotation shaft 42 of the swing member 80,
The pressing rod 62 presses the roller 50 downward, whereby the swing member 80 is pressed against the spring force of the spring 47.
Swing clockwise.

This tape feeder is configured as described above. Next, the operation will be described with reference to FIGS. FIG. 3 shows the initial state. In this state, the chip C to be picked up by the nozzle 61 of the head 60 has already been sent to the pickup position P and is waiting for pickup, and the shutter 52 covers the chip C.

Now, as shown in FIG. 4, the pressing rod 62 descends and presses the roller 50 to rotate the swinging member 80 clockwise. Then, the arm 80a takes up the winding lever 82
, The first spring 83 and the second spring 84 contract, and the winding lever 82 is pulled by the second spring 84 and rotates counterclockwise. Even if the take-up lever 82 rotates in the counterclockwise direction, the one-way clutch 24 does not rotate the take-up reel 21 in the same direction. When the swing member 80 rotates clockwise, the first link member 43 and the second link member 44 swing in conjunction therewith, the shutter 52 retreats, and the chip C waiting at the pickup position P is moved. Is exposed. Here, the nozzle 61 of the head 60 moves up and down, and the chip C is vacuum-adsorbed and picked up. Next, the head 60 moves above the substrate (not shown), and mounts the chip C at a predetermined coordinate position on the substrate.

Next, the pressing rod 62 rises, and the roller 50
Is released. Then, the swing member 80 swings counterclockwise by the spring force of the spring 47, and in conjunction with this, the first link member 43 and the second link member 44 also swing, and the sprocket 11 moves counterclockwise. It rotates and feeds the tape 4 by one pitch. At the same time, the winding lever 82
Is rotated clockwise, the take-up reel 21 is also rotated in the same direction, and the cover tape 4a is wound while being peeled off by the peeling claw 53.

By repeating the above operation, the tape 4 wound on the supply reel 72 is pitch-fed,
The chips C are sequentially picked up by the nozzles 61 of the head 60 and mounted on the substrate. In the above operation, the take-up lever 82 holds the intermediate position pulled by both the first spring 83 and the second spring 84, and does not collide with the arm 80a unlike the conventional example. Therefore, the tape feeder does not vibrate due to the impact of the collision, and it is possible to prevent the chip C from jumping out of the pocket of the tape 4 due to the impact.

Next, a torque absorbing mechanism will be described with reference to FIG. As described above, when the take-up lever 82 swings, the take-up reel 21 rotates clockwise in pitch and winds the cover tape 4a. Here, in the case where the winding diameter r1 of the cover tape 4a is small, when the swinging member 80 swings counterclockwise and returns to the initial position, the winding lever 82 is pulled by the first spring 83 to move to the L position. To the M position. That is, the winding diameter r
When 1 is small, the take-up lever 82 swings by a large angle θ1 to rotate the take-up reel 21.

On the other hand, when the winding diameter r2 of the cover tape 4a is large, the winding lever 82 moves from the L position to the N position, but the swing angle θ2 is small. That is, the swing angle of the take-up lever 82, that is, the rotation angle of the take-up reel 21, decreases as the winding diameter increases. As described above, in this tape feeder, the rotation angle of the take-up reel 21 automatically changes in accordance with the change in the winding diameter of the cover tape 4a. It can be stably wound by a fixed amount.

[0029]

As described above, according to the present invention, it is possible to eliminate the occurrence of an impact when the swing member swings, and to prevent the chip from jumping out of the tape pocket. In addition, fluctuations in the torque of the take-up reel caused by fluctuations in the diameter of the cover tape wound on the take-up reel can be absorbed, and the cover tape can be stably wound on the take-up reel by a fixed amount.

[Brief description of the drawings]

FIG. 1 is a side view of a tape feeder according to an embodiment of the present invention.

FIG. 2 is a partial side view of the tape feeder according to one embodiment of the present invention.

FIG. 3 is a partial side view of the tape feeder according to the embodiment of the present invention during operation.

FIG. 4 is a partial side view of the tape feeder according to the embodiment of the present invention during operation.

FIG. 5 is an explanatory diagram of torque fluctuation absorption of the tape feeder according to one embodiment of the present invention.

FIG. 6 is a side view of a conventional tape feeder.

[Explanation of symbols]

 Reference Signs List 2 base 4 tape 4a cover tape 11 sprocket 13 ratchet wheel 21 take-up reel 53 peeling claw 72 supply reel 80 swing member 82 take-up lever 83 first spring 84 second spring

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-165699 (JP, A) JP-A-4-199793 (JP, A) JP-A-6-171810 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) H05K 13/00-13/04

Claims (1)

(57) [Claims] 1. A base, a tape supply reel provided at a rear portion of the base, and a pitch feeder provided at a front end of the base and feeding a tape derived from the supply reel at a pitch. A peeling unit that turns over and peels off the cover tape attached to the upper surface of the tape on the upper surface of the base to expose the chip stored in the tape, and a winding unit that winds the peeled cover tape. Take reel and
A rocking member that drives the pitch feed unit by pitching by performing a rocking operation and rotates the winding reel by a pitch, wherein the winding is performed to rotate the winding reel by a pitch. A take-up lever provided coaxially with the reel is connected to the swing member via a first spring, and is connected to the base via a second spring. The tape feeder according to claim 1, wherein a change in torque of the take-up reel is absorbed by a spring force of a second spring.