JP2973856B2 - 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 for supplying a chip mounted on a substrate in an electronic component mounting apparatus.

[0002]

2. Description of the Related Art In an electronic component mounting apparatus, an electronic component (hereinafter, referred to as "chip") provided in a parts feeder is vacuum-adsorbed to a nozzle of a transfer head, picked up, and transferred and mounted on a substrate. I have. There are various types of parts feeders, such as a tape feeder, tube feeder, and tray feeder.The tape feeder is particularly popular because it can easily supply chips at high speed and in large quantities. Used.

Hereinafter, a conventional tape feeder will be described. FIGS. 8, 9, and 10 are side views of a pitch feed section of a conventional tape feeder, and show the operation order of the tape pitch feed. In FIG. 8, reference numeral 1 denotes a base, on which a pitch feed unit 2 is provided. The pitch feeder 2 is configured as follows. Reference numeral 3 denotes a rotating shaft, on which a sprocket 4 and a ratchet wheel 5 are coaxially mounted. Reference numeral 6 denotes a feed claw, which is pivotally mounted on the pin 7, and the tip of which is engaged with the teeth of the ratchet wheel 5. The feed claw 6 is repelled by a spring member 8 in a counterclockwise direction. Reference numeral 9 denotes a drive lever, and the pin 7 of the feed pawl 6 is mounted on the drive lever 9. When the drive lever 9 is driven by a swing lever (not shown) and swings, the feed pawl 6
Swings in tandem with this, engages and disengages with the teeth of the ratchet wheel 5, and rotates the ratchet wheel 5 pitchwise in the counterclockwise direction (arrow a). The sprocket 4 also rotates in pitch in the same direction in conjunction with the ratchet wheel 5. A tape 10 is tuned to the sprocket 4, and the tape 10 is pitch-fed forward by pitch rotation of the tape.

[0004] Reference numeral 11 denotes a reverse rotation preventing claw, which is mounted on a pin 12. The reverse rotation preventing claw 11 is resiliently repelled by a spring material 13, and the tip end thereof is engaged with the tooth portion of the ratchet wheel 5, and the ratchet wheel 4 is reversed in the direction (clockwise) opposite to the pitch feed direction of the tape 10. Prevents rotation.

[0005] Reference numeral 15 denotes a shutter. This shutter 15
Covers the upper part of the pitch feed unit 2. Shutter 1
A pin 16 is fitted in a long hole 17 opened on the side surface of the shutter 5, and a pin 18 protruding from the tip of the drive lever 9 is engaged with the side surface of the shutter 15. Therefore, when the drive lever 9 swings, the shutter 15 slides in the front-back direction. The shutter 15 prevents a chip (not shown) stored in the pocket of the tape 10 from jumping out of the pocket at the pickup position. 19 is a cover plate for guiding the tape 10 out.

[0006] The conventional tape feeder is configured as described above, and its operation will be described next. FIG. 8 shows an initial state. In this state, the feed pawl 6 is engaged with the teeth 5a of the ratchet wheel 5, and the reverse rotation preventing pawl 11 is also engaged with the teeth. Further, the shutter 15 is located at a position advanced to the left, and covers the chip so that the chip picked up by the nozzle of the transfer head does not jump out of the pocket of the tape 10.

When the drive lever 9 swings downward (in the direction of the arrow b) as shown in FIG. 9, the feed pawl 6 rotates clockwise in conjunction with the drive lever 9 and rides on the teeth 5a. In conjunction with this, the shutter 15 is pushed by the pin 18 and moves rearward (arrow c), exposing the chip at the pickup position P. Therefore, the nozzle 21 of the transfer head moves up and down,
This chip is picked up by vacuum suction and transferred and mounted on a substrate (not shown).

[0008] Now, as shown in FIG.
Further swings in the direction of arrow b, the leading end of the feed claw 6 rides over the tooth 5a of the ratchet wheel 5 and fits between this tooth 5a and the next tooth 5b. In this case, since the feed claw 6 is resiliently resilient to the spring member 8, the tooth portions 5a and 5
b. In this way, the feed claw 6 is
, The ratchet wheel 5 and the sprocket 4 rotate counterclockwise by the pitch of the teeth 5a, whereby the tape 10 is fed by one pitch, and the next chip is moved at the pickup position P. Stop.
Next, the drive lever 9 swings in the direction d and returns to the initial position shown in FIG. 8, and the shutter 15 also moves in the direction e and returns to the initial position. By repeating the above operation, the tape 10 is fed at a pitch, and the chips stored in the pockets of the tape 10 are sequentially picked up by the nozzles 21 and transferred and mounted on the substrate.

[0009]

As described above, in the conventional tape feeder, the feed claw 6 is engaged with and disengaged from the teeth of the ratchet wheel 5 to rotate the ratchet wheel 5 to feed the tape 10 at a pitch. is there. However, the feed claw 6
When the state of FIG. 9 shifts from the state of FIG. 9 to the state of FIG. 10, that is, the leading end of the feed claw 6 gets over the tooth 5a and the tooth 5a
When the feed claw 6 is fitted between the first tooth 5b and the next tooth 5b, the feed claw 6 is repelled by the spring force of the spring member 8 and collides strongly with the front surface of the next tooth 5b. For this reason, the impact is transmitted to the tape 10 via the ratchet wheel 5 and the sprocket 4, etc.
Has a problem that the chip in the pocket of the tape 10 tends to jump out of the pocket because of the vibration.
When the chip pops out in this way, the transfer head 2
The nozzle 21 of 0 cannot pick up this chip.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape feeder which can eliminate the impact caused by the above-mentioned tape pitch feeding and can prevent chips from jumping out.

[0011]

For this purpose, the present invention relates to a tape feeder for feeding a pitch of a tape by a pitch feeder comprising a sprocket, a ratchet wheel, a feed claw, and the like. A stopper is provided for preventing rotation of the feed claw and avoiding collision with the teeth before colliding with the teeth.

[0012]

According to the above construction, the feed claw is prevented from being repelled by the spring material and colliding with the tooth portion of the ratchet wheel, and the tip is prevented from jumping out of the tape pocket due to the vibration caused by the impact of the collision. .

[0013]

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 one embodiment of the present invention. FIGS. 2 to 7 are side views of the pitch feed section of the tape feeder, and show the operation sequence of the pitch feed of the tape. In each of the drawings, the same parts as those of the conventional example shown in FIGS.
Description is omitted.

In FIG. 1, a base 30 is provided below the base 1.
Are integrally mounted. The base 30 is a table 3
1 is mounted on. The table 31 is a table device 3
2 above. A nut 33 provided on the lower surface of the table 31 is screwed into a horizontal feed screw 34 provided on the table device 32. When the feed screw 34 is driven and rotated by a motor (not shown), the table 31 reciprocates in a horizontal direction (a direction perpendicular to the paper) along the feed screw 34 on the table device 32, and a tape having a desired chip is formed. The feeder 40 is stopped at the pickup position P of the nozzle 21 of the transfer head 20.

Next, the structure of the tape feeder 40 will be described. A holder 41 is provided at the rear of the base 1. The holder 41 holds a supply reel 42 around which the tape 10 is wound. 43 is a handle formed integrally with the holder 41. The operator holds the handle 43 and performs the work of attaching and detaching the tape feeder 40 to and from the table 31.

At the rear of the base 1, a lever 44 is provided upright. A clamp claw 45 is connected to the lower end of the lever 44. When the lever 44 is tilted backward as shown by the solid line in FIG. 1, the clamp claw 45 presses against the tapered surface 46 a of the concave portion 46 formed in the table 31, and the tape feeder 40 is fixed on the table 31. When the lever 44 is tilted forward as indicated by the chain line, the clamp claw 45 rotates upward and separates from the tapered surface 46a, and the tape feeder 40 can be removed from the table 31.

At the center of the base 1, a frame 50 is provided upright. A take-up reel 51 is mounted on the frame 50. The take-up reel 51 is provided with a cover tape 1 that has been folded and peeled off from the upper surface of the tape 10 while the tape 10 is being pitch-fed by the pitch feed unit 2.
Wind up 0a.

Reference numeral 60 denotes a swing lever, which is pivotally mounted on a pin 61 so as to be swingable in the front-rear direction. Swing lever 6
0 is connected to the drive lever 9 by a pin 62. A spring 63 is connected to this lower end, and the swing lever 60 is resiliently rotated by the spring force so as to rotate counterclockwise about the pin 61. A lever 52 is coaxially connected to the take-up reel 51. The distal end of the lever 52 is connected to the swing arm 60 by a spring 53 and to the frame 50 by a spring 54.

A roller 64 is mounted on the side surface of the swing lever 60. Reference numeral 70 denotes a pressing rod on the side of the electronic component mounting apparatus (not shown). When the pressing rod 70 descends and pushes the roller 64 downward, the swing lever 60 rotates clockwise about the pin 61. When the pressing rod 70 is lifted to release the pressing state of the roller 64, the swing lever 60 rotates counterclockwise by the spring force of the spring 63.
When the swing lever 60 swings back and forth about the pin 61 in this manner, the drive lever 9 swings about the pin 65 to rotate the sprocket 4 and the ratchet wheel 5 (see FIG. 2) at a pitch. In conjunction with this, the arm 52 also swings up and down, and the take-up reel 51 rotates clockwise in pitch to wind up the cover tape 10a.

In FIG. 2, a pin-shaped stopper 22 protrudes from the inner surface of the drive lever 9. This stopper 2
Reference numeral 2 designates a rotation limit at which the feed pawl 6 rotates counterclockwise about the pin 7 by the spring force of the spring material 8.

The operation of the tape feeder 40 is as described above. Next, the operation of the tape feeder 40 will be described with reference to FIGS. FIG. 2 shows the initial state. In this state, the feed pawl 6 is engaged with the teeth 5a of the ratchet wheel 5, and the reverse rotation preventing pawl 11 is also engaged with the teeth of the ratchet wheel 5.
Further, the shutter 15 is located at a position advanced to the left, and covers the chip so that the chip picked up by the nozzle of the transfer head does not jump out of the pocket of the tape 10. Here, the feed pawl 6 is repelled in the counterclockwise direction by the spring force of the spring material 8, but since the rotation limit is defined by the stopper 22, a small gap t is formed between the feed pawl 6 and the tooth portion 5a. Is secured.

In FIG. 1, when the pressing rod 70 descends to push the roller 64 downward, the swing lever 6
0 swings clockwise, and the drive lever 9 swings in the f direction in FIG. Then, similarly to the conventional example described with reference to FIG. 9, the feed pawl 6 rides on the tooth portion 5a in conjunction with this swing, and the shutter 15
And moves backward (arrow g) to expose the chip at the pickup position P.

Next, as shown in FIG.
When the feed pawl 6 passes over “a”, the feed pawl 6 rotates counterclockwise vigorously by the spring force of the spring material 8 and collides with the stopper 22. In this state, a small gap t is secured between the feed claw 6 and the next tooth portion 5b. That is, even if the feed claw 6 is repelled by the spring material 8 and rotates counterclockwise, the feed claw 6 does not collide with the next tooth portion 5b as in the conventional example shown in FIG. Therefore, the pitch feed unit 2 such as the ratchet wheel 5 and the sprocket 4 does not vibrate due to the impact, and the chip does not jump out of the pocket of the tape 10.

With the shutter 15 opened as described above, the chips in the pocket of the tape 10 are transferred to the transfer head 2.
The nozzle 21 is vacuum-adsorbed and picked up, and is transferred and mounted on a substrate (not shown) (see FIG. 5).

Next, the pressing rod 70 shown in FIG. 1 is lifted to release the pressing state of the roller 64. Then swing lever 6
Numeral 0 rotates counterclockwise by the spring force of the spring 63 and returns to the original position. Then, the drive lever 9 swings in the opposite direction (arrow h) as shown in FIG. 6, and accordingly, the shutter 15 moves in the direction of arrow i and returns to the original position. In conjunction with this, the feed pawl 6 swings and pushes up the tooth portion 5a to rotate the ratchet wheel 5 and the sprocket 4 clockwise (arrow j). Then, the tape 10 tuned to the sprocket 4 is sent forward by one pitch, and the chip in the next pocket moves to the pickup position and stops.
It returns to the initial state shown in FIG. FIG. 7 is the same state as FIG.

As described above, the tape feeder 40
The tape 10 is pitch-fed by the ratchet wheel 5 and the sprocket 4 being pitch-rotated by the feed pawl 6 by the rocking lever 60 being pivoted about the pin 61 by being pressed by the pressing rod 70. By providing the stopper 22 for preventing the rotation of the ratchet wheel 5 before it collides with the next tooth portion, the feed pawl 6 strongly collides with the next tooth portion, and the impact generates vibration. The chip can be prevented from jumping out of the pocket of the tape 10 due to the vibration.

[0027]

As described above, according to the present invention, since the feed pawl for rotating the ratchet wheel or the sprocket by the pitch is prevented from colliding with the ratchet wheel by the stopper, the pitch of the sprocket or the like is moved by the impact of the collision. It is possible to prevent the chip stored in the pocket of the tape from jumping out due to the vibration of the portion, and it is possible to reliably suction the chip to the nozzle of the transfer head and pick it up.

[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 side view of a pitch feed unit of the tape feeder according to one embodiment of the present invention.

FIG. 3 is a side view of a pitch feed unit of the tape feeder according to one embodiment of the present invention.

FIG. 4 is a side view of a pitch feed unit of the tape feeder according to one embodiment of the present invention.

FIG. 5 is a side view of a pitch feed unit of the tape feeder according to one embodiment of the present invention.

FIG. 6 is a side view of a pitch feed unit of the tape feeder according to one embodiment of the present invention.

FIG. 7 is a side view of a pitch feed unit of the tape feeder according to one embodiment of the present invention.

FIG. 8 is a side view of a pitch feed unit of a conventional tape feeder.

FIG. 9 is a side view of a pitch feed unit of a conventional tape feeder.

FIG. 10 is a side view of a pitch feed unit of a conventional tape feeder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Pitch feed part 3 Rotary shaft 4 Sprocket 5 Ratchet wheel 5a, 5b Tooth part 6 Feeding claw 8 Spring material 9 Drive lever 10 Tape 11 Reverse prevention claw 22 Stopper 40 Tape feeder 42 Supply reel 60 Swing lever

Claims (1)

(57) [Claims] 1. A base, a tape supply unit provided at a rear portion of the base, and a pitch feed unit provided at a front portion of the base and feeding a tape derived from the tape supply unit at a pitch. A tape feeder comprising a drive lever for pitch-driving the pitch feeder, wherein the pitch feeder is pivotally mounted on the same rotating shaft and feeds the tape at a pitch, and a sprocket and a ratchet wheel; A feed pawl for engaging and disengaging the teeth of the ratchet wheel to rotate the sprocket by a pitch by being swung by being driven by a lever, and a spring material resilient in a direction for engaging the feed pawl with the teeth A reverse rotation preventing claw that engages with the tooth portion of the ratchet wheel to prevent reverse rotation thereof, and that the feed claw is repelled by the spring material to prevent the rotation of the feed claw before colliding with the tooth portion. A tape feeder provided with a stopper for blocking and avoiding collision with the teeth.