JPH09312493A - Tape feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape feeder for pitch feeding as predetermined by pitch- rotating a sprocket and picking up electronic parts from the pockets on the tape by a nozzle of a transferring head which can feed the tape pitch by pitch smoothly by reducing the spring force of a spring acting on a pressing member for preventing the tape from being detached from the sprocket. SOLUTION: A tape 8 is fed pitch by pitch on a base 2 by a feeding means. While the tape is fed, electronic parts in the tape 8 are picked up by a transferring head and put down on a substrate. The tape 8 is pressed against a sprocket by a pressing member on which a wire spring 53 acts. A first member 60 coaxial with the pressing member 52 and a second member 61 having an upper end 61a for engaging a lower end 60a of the first member 60 are provided. A spring 62 acts on the second member 61 to prevent a component of force fin a vertical direction from being produced.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A tape feeder is often used as an electronic component supply device used in an electronic component mounting device.
The tape feeder is configured by providing a supply reel around which a tape is wound at the rear part of the base, a sprocket on which the tape is banded, and pitch rotating means for rotating the sprocket at a pitch at the front part of the base. By driving the pitch rotating means, the tape is pitch-fed on the upper surface of the base, while the electronic components stored in the tape pocket are vacuum-adsorbed and picked up by the nozzle of the transfer head, It is designed to be transferred and mounted on a substrate.

Further, in this type of tape feeder, a pressing member is provided above the tape that surrounds the sprocket so that the tape that surrounds the sprocket does not float up and fall off the sprocket. It is designed to be released and pressed against the upper surface of the tape (for example, JP-A-59-232499). In the present invention, the tape means an electronic component storage tape in which electronic components are stored one by one inside the pockets formed at the pitch.

[0004]

However, in the conventional tape feeder, when the tape is pitch-fed along the sprocket, the pressing member is pushed upward against the spring force of the spring material, and as a result, the tape is There was a problem that the trouble of separating from the sprocket was likely to occur.

As a means for solving such a problem, it is considered that the spring force of the spring material is strengthened so that the pressing member is strongly pressed against the upper surface of the tape. However, in this case, since the tape is pressed against the peripheral surface of the sprocket with an excessive force, it becomes difficult to smoothly feed the tape, and the driving force of the pitch rotating means for rotating the sprocket must be increased. However, a new problem arises in that the pitch rotating means must be constructed more firmly.

Further, when the electronic parts of the tape are out of stock and the tape must be replaced, the operator must push open the pressing member against the spring force of the spring material with his fingertip. However, if the spring force of the spring member is increased, a new problem arises in that the pressing member becomes difficult to push open.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a tape feeder which can prevent the tape from floating and falling off the sprocket by the spring force of a relatively small spring material.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a base, a sprocket in front of the base for adjusting a tape fed from a tape supply section, and a tape by rotating the sprocket with a pitch. A pitch-rotating means for pitch-forwarding on the base, a pressing member positioned above the tape that is rotatably attached to the rotation shaft and goes around the peripheral surface of the sprocket, and the pressing member is pressed against the tape. A tape feeder comprising a spring material that springs in the direction, and vacuum feeds the electronic components housed in the tape pocket to the nozzle of the transfer head while pitch-feeding the tape. A first member that rotates integrally with the member, a second member that engages and disengages with the first member, and a resilient force in a direction in which the second member engages with the first member. A root member provided is the second member so as not to cause the vertical component force by the spring force of the spring member that so as to engage with the first member.

[0009]

According to the structure of the present invention, by engaging the first member and the second member, it is possible to reliably prevent the tape from rising and coming off from the sprocket during the pitch feeding of the tape. In addition, the spring force of the spring member that repels the second member does not generate a vertical component force, so the pressing member is not pressed against the tape with an excessive force, and the sprocket is rotated with a relatively small pitch rotational force. The tape can be pitch-fed by rotating the pitch.

An embodiment of the present invention will be described below 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 side view of the tape feeder and a cutter unit, and FIG. 3 is a partial perspective view of the tape feeder.
4, 5, 6, and 7 are partial side views of the tape feeder, FIG. 8 is a front view of a cover member of the tape feeder, FIG. 9 is a perspective view of a holding member of the tape feeder, and FIG. It is a perspective view of the cover member of a tape feeder.

First, the overall structure of the tape feeder will be described. 1 and 2, the tape feeder 1 mainly includes a long plate-shaped base 2. A supply reel 4 as a tape supply unit is pivotally mounted on a bracket 3 mounted on the rear portion of the base 2. A tape 8 is wound around the supply reel 4. Reference numeral 7 denotes an operation lever for attaching and detaching the tape feeder 1 to and from a mounting table (not shown).

A frame 10 is erected at the center of the base 2. A take-up reel 11 is pivotally attached to the frame 10. The take-up reel 11 winds the cover tape 9 separated from the upper surface of the tape 8.

2 and 3, pitch feeding means for the tape 8 described below is provided at the front part of the base 2. Reference numeral 20 is a sprocket, 21 is a ratchet wheel, and is coaxially attached to the rotary shaft 22. The tape 8 is banded on a sprocket 20. In FIG. 3, the sprocket 20 and the ratchet wheel 21 are simply drawn. A lever 23 is attached to the rotary shaft 22. In FIG.
A frame 24 is erected at the center of the base 2. Two
A rocking lever 5 is pivotally attached to the frame 24 by a pin 26.

The swing lever 25 and the lever 23 are connected by a rod 27 which constitutes a link mechanism. 28, 29
Is a connecting pin. A spring 30 is stretched at the lower end of the rocking lever 25, and the rocking force of the rocking lever 25 causes the rocking lever 25 to spring counterclockwise. Reference numeral 31 is a stopper pin that defines the counterclockwise rotation limit of the swing lever 25. A key-shaped lever 32 is pivotally attached to the frame 10. The tip of the lever 32 and the swing lever 25 are connected by a spring 33. Reference numeral 34 is a feed pawl that is pivotally attached to the lever 23 and engages with the ratchet wheel 21, and 35 is a pawl that prevents the ratchet wheel 21 from rotating in the reverse direction.

In FIG. 2, reference numeral 36 is a pressing rod provided in an electronic component mounting apparatus (not shown). The pressing rod 36 moves down to press the upper surface of the rocking lever 25 and release the pressing. Then, the rocking lever 25 rocks clockwise against the spring force of the spring 30 (arrow A). Then, the rod 27 reciprocates (arrow B) and the lever 23 swings (arrow C). Then, the sprocket 20 is driven by the feed claw 34 to rotate the pitch, and the tape 8 is pitch-fed forward (leftward) on the upper surface of the base 2. That is, the elements denoted by reference numerals 21 to 35 are the sprockets 20.
A pitch rotation means for rotating the pitch.

2 and 3, a horizontal rod 40 is connected to the upper end of the lever 23. Rod 4
A shutter 41 is rotatably connected to a rear end portion of 0 by a pin 42. The shutter 41 is located on the upper surface of the tape 8 which is pitch-fed over the upper surface of the base 2, and its front end portion 41a is a peeling claw. Further, a pressing piece 43 is detachably connected to the center of the rod 40. Presser piece 43
Is ejected downward by a spring 44, and the shutter 4
This is held so that 1 does not rise.

In FIG. 3, when the lever 23 swings in the direction of arrow C, the rod 40 reciprocates in the direction of arrow D, whereby the shutter 41 slides in the direction of arrow E (pitch feed direction of the tape 8). Further, in FIG. 2, the swing lever 2
When 5 swings in the direction of arrow A, the lever 32 swings in the direction of arrow F, whereby the take-up reel 11 rotates in the direction of arrow G by pitch. The cover tape 9 attached to the upper surface of the tape 8 is folded back by the peeling claw 41a and wound around the winding reel 11, and the peeling claw 41a is rotated by the pitch rotation of the winding reel 11 in the arrow G direction. It is taken up by the take-up reel 11 while being peeled off from the tape 8. Further, the shutter 41 reciprocates in the direction of arrow E, but as shown in FIG. 4, when the shutter 41 moves leftward,
In the shutter 41, the nozzle 13 of the transfer head 12 is the tape 8
The pickup position P (FIG. 2) for picking up the electronic components housed in the pocket of the
Prevents unwanted popping out of your pocket.

Further, as shown in FIG. 5, with the shutter 41 retracted, the pickup position P is opened by the interval t. At the pickup position P, the cover tape 9 is folded back and peeled off by the peeling claw 41a, so that the electronic components in the pocket are exposed to the outside at the interval t, and the nozzle 13 (FIG. 2) of the transfer head 12 is used. Pick up and transfer to a substrate (not shown).

In FIGS. 3 and 4, a box-shaped cover member 50 is provided at the front end of the base 2. A horizontal pin 51 is pivotally supported on the upper portion of the cover member 50.
52 is a long plate-shaped pressing member, and is a cover member 50.
Extends above the sprocket 20. Pin 51
A wire spring 53 as a spring material is attached to the. The wire spring 53 extends above the pressing member 52 and presses the pressing member 52 by its spring force. Therefore, the pressing member 52 elastically presses the tape 8 traveling along the sprocket 20 against the peripheral surface of the sprocket 20 from above, and prevents the tape 8 from floating and separating from the sprocket 20. Is reliably fed by the sprocket 20.

As shown in FIG. 9, a tunnel 52a is formed in the pressing member 52 along its longitudinal direction. Pockets 14 formed at a pitch on the tape 8
In the pickup position P, the nozzle 13 of the transfer head 12 picks up the electronic component 15 by vacuum suction. However, the electronic component 15 may be picked up incorrectly and may remain upright in the pocket 14 as shown in FIG. Such an electronic component 15 can pass through the tunnel 52a and be sent to the cutter unit (described later) 70 side.

8 and 10, the cover member 5
A horizontally long passage opening 54 is opened on the front surface of 0, and a sub passage opening 55 is formed above the passage opening 54. Empty tape 8 sent from sprocket 20
Is sent to the cutter unit 70 through the passage port 54. In addition, the electronic component 15 that stands up in the pocket 14
Is sent to the cutter unit 70 through the sub passage port 55.

Next, the pressing mechanism of the pressing member 52 will be described. 6 and 7 show the front end portion of the base 2, and show the surface on the opposite side of FIGS. 4 and 5. Reference numeral 60 denotes a key-shaped first member which is integrally pivoted to the pin 51 together with the pressing member 52. The first member 60 is arranged on the side surface of the base 2. Reference numeral 61 is a key-shaped second member pivotally attached to the side surface of the base 2 by a pin 62. The lower end portion 60a of the first member 60 is horizontal, the upper end portion 61a of the second member 61 is horizontal, and the upper end portion 61a is the lower end portion 60.
It is located on the upper surface of a. The second member 61 is elastically urged counterclockwise by the spring 62, so that the upper end portion 61a is elastically urged in the horizontal direction H, that is, in the direction located on the lower end portion 60a. 63 is the second member 61
It is a stopper pin that defines the counterclockwise rotation limit of.

Next, the functions of the first member 60, the second member 61 and the spring 62 will be described with reference to FIG.
FIG. 6 shows a normal state in which the tape 8 is pitch-fed. As described above, the sprocket 20 constituting the pitch feeding means rotates by the pitch to feed the tape 8 forward, but this pitch feeding needs to be performed stably and smoothly. Specifically, when the tape 8 floats up and separates from the sprocket 20, the tape 8 cannot be pitch-fed, so the tape 8 is elastically pressed by the pressing member 52 pressed by the wire spring 53, and the tape 8 is pressed. Does not come off from the sprocket 20.

However, in the conventional tape feeder, the first tape feeder
Since the member 60 and the second member 61 are not provided, the pressing member 52 may momentarily float up in conjunction with the pitch feed of the tape 8. Therefore, the tape 8 is separated from the sprocket 20 and the pitch feed of the tape 8 is performed. The problem was that it became impossible. As a measure for preventing the occurrence of such a trouble, it is considered that the spring force of the wire spring 53 is increased and the pressing member 52 presses the tape 8 against the sprocket 20 with a stronger force. However, if such a measure is taken, the pressing member 52 is pressed against the tape 8 with an excessive force, which causes a problem that smooth pitch feeding of the tape 8 becomes difficult.

Therefore, the tape feeder 1 solves this problem by providing the first member 60, the second member 61, the spring 62 and the like, and the reason will be described below. In FIG. 6, the upper end portion 61 of the second member 61
a is on the lower end portion 60a of the first member 60 and is urged in the horizontal direction (the direction of arrow H) by the spring force of the spring 62. Therefore, from the upper end portion 61a to the lower end portion 60a
Vertical component force f applied to is 0 or almost 0
It is. This means that the spring force of the spring 62 exerts no or almost no action in the direction in which the pressing member 52 (the pressing member 52 is integral with the first member 60) presses the tape 8 downward. . on the other hand,
Since the upper end portion 61a is located on the lower end portion 60a, the first member 60 rotates clockwise around the pin 51 (that is, the first member 60a).
The pressing member 52, which is integral with the member 60, is firmly prevented from rotating in the clockwise direction and in the direction in which the pressing member 52 floats from the tape 8).

From the above, according to the tape feeder 1, the pressing member 52 rotates clockwise during the pitch feeding and floats up from the tape 8, and as a result, the tape 8 is reliably separated from the sprocket 20. Can be prevented.
Moreover, the pressing member 52 is a wire spring 53 (this wire spring 53
(The spring force of the tape is relatively small) is pressed against the tape 8 only by the spring force of, so that the pressing member 52 is not strongly pressed against the tape 8 by an excessive force.
The pitch feeding means can smoothly feed the pitch with a relatively small pitch feeding force.

Now, for example, when the tape 8 is replaced, the tape 8 must be attached to and detached from the tape feeder 1. Therefore, the work for removing the tape 8 will be described next. FIG. 7 shows a state where the tape 8 is being removed from the sprocket 20. In this case, the end of the second member 61 is pushed up by the fingertip, and the second member 6
1 is rotated clockwise against the spring force of the spring 62. Then, as shown in the figure, the upper end portion 61a becomes lower end portion 60.
Move away from a.

When the locked state of the first member 60 by the second member 61 is released in this manner, the first member 60 is rotated clockwise as shown in the drawing. Then, the pressing member 52 integrated with the first member 60 also rotates in the same direction and is pushed open, and is separated from the upper surface of the tape 8. In this way, the pressing member 52 is moved upward, and then the tape 8 is removed from the sprocket 20. Then, the new supply reel 4 is mounted on the bracket 3, the tape 8 pulled out from the supply reel 4 is banded on the sprocket 20, and the state shown in FIG.

Next, the cutter unit 70 will be described. In FIG. 2, a cutter unit 70 is provided in front of the tape feeder 1. Cutter unit 7
Reference numeral 0 is configured by housing an upper blade (fixed blade) 72 and a lower blade (movable blade) 73 inside a case 71. The lower blade 73 is driven by driving means (not shown) to move up and down with respect to the upper blade 72. The empty tape 8 fed from the tape feeder 1 is fed between the upper blade 72 and the lower blade 73,
2 and the lower blade 73 finely cut into chips 8 '.

The tape 8 is cut by the lower blade 73 rising relative to the upper blade 72, but the conventional tape feeder has no cover member 50.
When the lower blade 73 rises, the tape 8 swings upward so that the tape 8 can be flipped up by the lower blade 73 (see the tape 8 indicated by the chain line in FIG. 2), and thus the tape 8 cannot be cut reliably. is there. However, in the tape feeder 1, as shown in FIGS. 8 and 10, since the tape 8 passes through the passage opening 54 of the cover member 50, even if the lower blade 73 rises, the tape 8 is not repelled by the lower blade 73. ,
The posture shown by the solid line in FIG. 2 is maintained. Therefore, the tape 8 is surely cut. Further, the electronic component 15 that stands up and remains in the pocket 14 passes through the sub passage port 55 (FIG. 8) of the cover member 50, is sent into the case 71, and is reliably collected in the case 71. Of course, as described above, when the lower blade 73 rises, the tape 8 maintains the above posture without being lifted by the lower blade 73, so that the pocket 1
The electronic component 15 in the unit 4 does not scatter to the surroundings, and is reliably sent to and collected in the case 71 of the cutter unit 70.

Next, a means for eliminating a pickup error due to magnetism and static electricity will be described. In FIG. 4, the cover tape 9 is peeled off by the peeling claw 41a while the tape 8 is pitch-fed, and the electronic component 15 in the pocket 14 exposed by this is vacuum-sucked by the nozzle 13 of the transfer head 12 to be picked up. Is. However, if the members such as the shutter 41 and the pressing member 52 that are in sliding contact with the tape 8 are magnetic and defective conductors such as stainless steel, the tape 8 is used.
Magnetic force and static electricity are generated due to the sliding contact with and the peeling of the cover tape 9. As a result, the electronic component 15 in the pocket 14 is adsorbed by the cover tape 9 and moves toward the take-up reel 11 together with the cover tape 9 (see the electronic component 15 shown by the chain line in FIG. 4), and the pocket 14 is emptied. Therefore, the transfer head 12 cannot pick up the electronic component 15.

Therefore, in the tape feeder 1, the members such as the shutter 41 and the pressing member 52 that are in sliding contact with the tape 8 are made of a non-magnetic and good conductor having sufficient strength. Examples of such materials include phosphor bronze and
A ceramic or plastic with a conductive coating on its surface is used. As a result, the generation of magnetic force is eliminated, and the static electricity generated in the shutter 41 and the pressing member 52 is eliminated through the conductive members such as the pressing piece 43, the cover member 50, and the pin 51 that come into contact with them. Therefore, the above-mentioned trouble can be solved.

[0033]

According to the present invention, by engaging the first member and the second member, it is possible to reliably prevent the tape from being lifted and separated from the sprocket during the pitch feeding of the tape. Moreover, the spring force of the spring member that elastically urges the second member does not generate a vertical component force, so the pressing member is not pressed against the tape with an excessive force, and the sprocket is pitched with a relatively small pitch rotational force. Rotate it
The tape can be pitch fed. Further, at the time of tape replacement, the pressing member can be easily pushed open to attach / detach the tape to / from the sprocket.

[Brief description of 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 the tape feeder and the cutter unit according to the embodiment of the present invention.

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

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

FIG. 5 is a partial side view of the tape feeder according to the embodiment of the present invention.

FIG. 6 is a partial side view of the tape feeder according to the embodiment of the present invention.

FIG. 7 is a partial side view of the tape feeder according to the embodiment of the present invention.

FIG. 8 is a front view of the cover member of the tape feeder according to the embodiment of the present invention.

FIG. 9 is a perspective view of a pressing member of the tape feeder according to the embodiment of the present invention.

FIG. 10 is a perspective view of a cover member of the tape feeder according to the embodiment of the present invention.

[Explanation of symbols]

 1 Tape Feeder 2 Base 4 Supply Reel 8 Tape 9 Cover Tape 11 Take-up Reel 12 Transfer Head 13 Nozzle 14 Pocket 15 Electronic Parts 20 Sprocket 21 Claw Wheel 41 Shutter 41a Peeling Claw 50 Cover Member 52 Pressing Member 54 Passage Port 55 Sub passage port 60 First member 61 Second member 62 Spring 70 Cutter unit 72 Upper blade (fixed blade) 73 Lower blade (movable blade)

Claims (1)

[Claims] 1. A base, a sprocket at the front of the base for adjusting the tape fed from a tape supply section, and a pitch rotation of the sprocket to move the tape forward on the base. The tape is provided with a pitch rotating means for feeding the pitch, a pressing member located above the tape which is pivotally attached to the rotating shaft and is in contact with the sprocket, and a spring member which elastically springs the pressing member against the tape. A tape feeder in which electronic components housed in a tape pocket are vacuum-sucked and picked up by a nozzle of a transfer head while being pitch-fed, and a first member that rotates integrally with the holding member. A second member that engages and disengages with the first member and a spring member that elastically springs in a direction in which the second member engages with the first member. A tape feeder characterized in that the second member is engaged with the first member so that a vertical component force is not generated by the force.