JPH04369295A - Tape feeder - Google Patents

Abstract

PURPOSE:To eliminate a pickup mistake by a method wherein a tape to be pitch-fed on a pedestal is tightly pressed against the side of the pedestal at a pickup location of a transfer head. CONSTITUTION:A cover plate 22 is provided which covers a tape 2 to be pitch- fed along an upper surface of a pedestal 1 from above at a pickup location Q of a transfer head 50. One end of the cover plate 22 is rotatably pivoted on the side of a tip of the pedestal 1. A spring member 25 for biasing the one end below is provided, and also an engaging member 31 for detachably engaging with the other free end of the cover plate 22 and a spring member 33 for biasing the free end below are provided.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a tape feeder.
Specifically, the present invention relates to the structure of a cover plate that covers the tape from above so that the tape does not shake at the position where the electronic component is picked up by the transfer head.

0002

[Prior art] Resistor chips, capacitor chips, ICs,
2. Description of the Related Art In electronic component mounting apparatuses that automatically mount electronic components such as LSIs onto circuit boards, tape feeders are often used as a form of supply of electronic components.

FIG. 9 shows a conventional tape feeder, in which 101 is a base and 102 is a sprocket provided at the front of the base 101. A tape 103 led out from a supply reel (not shown) runs along the top surface of the base 101 while being pitch-fed by a sprocket 102, and at a pick-up position Q, the tape 103
The electronic component P stored in the transfer head 104 is attracted to the nozzle 105 of the transfer head 104 and picked up.

In this case, if the tape 103 rattles, a pick-up error will occur, so two opening/closing levers 106 and 107 are provided at the pick-up position Q as means for holding down the tape 103. One lever 10
6 is pivotally attached to a pin 108, and the tip edge a of the tape 103 is attached to the base 101 by the spring force of a wire spring 109.
Press it against the top surface.

The other lever 107 is pivoted to a pin 110, and its tip edge b presses the tape 103 against the top surface of the base 101 by the spring force of a leaf spring 111.
(See also Figure 10 above). In FIG. 10, P is tape 10
This is an electronic component stored in pocket 112 of No. 3.

[0006]

The levers 106 and 107 of the above-mentioned conventional means are cantilever-supported by pins 108 and 110, and the free end portions a and b of each of the levers 106 and 107 are as shown in the figure. As shown by the bold line 10, the tape 103 is pressed.

However, since the levers 106 and 107 have a cantilever structure, the levers 103 and 107 undergo torsional deformation while the levers 106 and 107 are repeatedly opened and closed.
As shown in FIG. 11, the levers 106 and 107 tilt laterally, making it impossible to firmly hold the tape 103, and only point holding (one-sided contact) is possible at point c, resulting in an unstable pressing state of the tape 103. However, there was a problem in that the transfer head was more likely to pick up electronic components incorrectly.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a tape feeder that solves the problems of the conventional means described above.

[0009]

[Means for Solving the Problems] To this end, the present invention provides a cover plate that covers the pickup position of the transfer head from above, and pivots one end of the cover plate rotatably toward the tip of the base. A spring member is provided on the base side for releasably engaging the other free end of the cover plate; A spring member is provided to bias the end portion downward.

0010

[Operation] According to the above structure, both ends of the cover plate are biased downward by the spring force of the spring material and are pressed toward the tape, making it possible to firmly press the tape against the base. In addition, the supporting structure of the cover plate becomes firm.

[0011]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a tape feeder. 1
is a long plate-shaped base, the rear part of which is provided with a supply reel 3 for the tape 2, and the front part of which is provided with a supply reel 3 for the tape 2.
A sprocket 4 is provided as pitch feeding means. When sprocket 4 rotates, tape 2 moves to base 1
is guided by the upper surface of the transfer head 50 and pitch-fed toward the pick-up position Q by the nozzle 51 of the transfer head 50.

Reference numeral 5 denotes a peeling claw for the cover tape 2a provided on the upper surface of the substantially central portion of the base 1 (see also FIG. 2). This peeling claw 5 is attached to the tip of the opening/closing arm 6. This opening/closing arm 6 is pivoted to a pin 7 and is urged downward by a wire spring member 8.

Reference numeral 9 denotes a bracket attached to the side wall surface of the base 1, and a claw-shaped engager 11 is pivotally attached to this bracket 9 by a pin 12 (see also FIG. 7). Reference numeral 13 denotes a spring material for biasing the engaging element 11. The engaging member 11 is removably engaged with an engaging portion 14 opened at the rear of the opening/closing arm 6.

When the claw portion 11a of the engaging element 11 is detached from the engaging portion 14, the opening/closing arm 6 is urged downward by the spring force of the spring member 8, and the peeling claw 5 is pressed against the upper surface of the tape 2. The cover tape 2a stuck to the upper surface of the tape 2 is folded back and peeled off by the tip edge 5a, and is wound onto the take-up reel 10.

In addition, in order to replace the tape 2, etc., the peeling claw 5
When you want to open the opening/closing arm 6, as shown in Figure 7,
Press down on the rear end with your fingertips. Then, the claw portion 11a of the engaging member 11 engages with the engaging portion 14, and the opening/closing arm 6 and the peeling claw 5 are maintained in the open state (see the chain line in FIG. 7). In this way, by holding the opening/closing arm 6 and the peeling claw 5 in the open state, it is possible to remove the tape 2 from the top surface of the base 1,
The tape 2 can be easily replaced by inserting it into the upper surface of the base 1.

If you want to return it to its original state, push the head of the engaging element 11 to the right in FIG. 7 with your fingertips. Then, the claw part 11
a is released from the engaging portion 14, and due to the spring force of the spring material 8,
The opening/closing arm 6 is pushed clockwise, and the peeling claw 5 is pressed against the upper surface of the tape 2. As described above, according to this means,
The peeling claw 5 can be easily opened and closed with a single touch operation of the fingertip.

In FIGS. 1 and 2, 21 is a frame attached to the front end of the base 1, and one end of a cover plate 22 is rotatably attached to this frame 21 by a pin 23. . This pin 23 is connected to the frame 21
The pin 23 is pivotally supported in a vertically elongated hole 24 formed in the pin 23, and the pin 23 is urged downward by a coil spring member 25. As shown in FIG. 1, the cover plate 22 includes a groove 26 into which the pin 4a of the sprocket 4 is fitted;
Pick up electronic component P stored on tape 2 at position Q
A window 27 is opened to expose the inside.

Reference numeral 31 denotes a lever-shaped engagement means rotatably attached to the side wall surface of the base 1 with a pin 32. The engaging means 31 is biased clockwise by a coil spring member 33, and has an upper end that can be freely engaged with and detached from an engaging portion 28 formed in a notch in the free end of the cover plate 22. A protrusion 34 is provided which engages with.

FIG. 3 shows the cover plate 22 in a closed state. In this state, both ends of the cover plate 22 are biased downward by the spring force of the spring members 25 and 33, so that the tape 2 on the base 1 can be firmly pressed against the surface. By firmly pressing the tape 2 in this way, mistakes in picking up the electronic component P by the transfer head 50 can be eliminated. As shown in FIG. 8, an escape groove 30 for the electronic component P housed in the pocket 2b of the tape 2 is formed on the inner surface of the cover plate 22.

In FIG. 2, there is a small gap G between the cover plate 22 and the peeling claw 5, and the cover tape 2a is led out to the take-up reel 10 through this gap G.

As shown in FIG. 2, the peeling claw 5 has a screw 29.
The opening/closing arm 6 can be slid freely in the tape feeding direction.
The size of the gap G can be changed by adjusting the position of the peeling claw 5.

[0023] Conventionally, the cover tape was peeled off and led out through a slit formed in a tunnel-shaped cover member that covered the tape on the base. However, with such conventional means, there is a limit to how small the width of the slit can be made, so minute electronic components attached to the inner surface of the cover tape tend to fly out or get caught in the slit. However, according to the above-mentioned means, the gap G can be made small and the occurrence of such troubles can be eliminated.

In FIGS. 1 and 4, reference numeral 41 denotes a drive lever pivotally attached to the side wall surface of the base 1. As shown in FIG. The arm portion 41
A is provided with a roll-shaped pressed portion 42 (Fig. 5
, see also Figure 6).

43 is a presser on the machine side, and when this presser 43 descends and presses the pressed part 42 downward,
The drive lever 41 swings counterclockwise in FIG. 4, the sprocket 4 rotates in pitch, and the tape 2 is fed in pitch. Incidentally, the pitch rotation means of the sprocket 4 is a well-known means, and therefore a detailed explanation thereof will be omitted. 44
4 is a stopper that defines the rotation limit of the drive lever 41;
5 is an elastic cushion member attached to the stopper 44. This cushion member 45 prevents the chip P in the pocket of the tape 2 from rattling due to the impact when the drive lever 41 hits the stopper 44.

By the way, the height of the pressed portion 42 varies slightly due to assembly errors and molding errors of the tape feeder. When the height of the pressed portion 42 varies in this way, the swinging of the drive lever 41 due to the pressure of the presser 43 also varies. Therefore, in order to solve these problems, the present device is configured as follows.

In FIG. 6, 47 is an eccentric pin, and a rotor 48 is attached to the arm portion 41a. The pressed portion 42 is attached to this rotor 48, and by rotating the eccentric pin 47 with a driver 46 and rotating the rotor 48, the height H of the upper surface of the pressed portion 42 can be finely adjusted. That's what I do.

[0028]

As explained above, in the present invention, both ends of the cover plate are biased toward the tape side by the spring force of the spring material, so that the tape is firmly pressed against the base side at the pick-up position. However, the rattling of the tape is eliminated, and the electronic components stored on the tape can be reliably picked up by the nozzle of the transfer head.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a tape feeder according to the present invention.

[Figure 2]
A partial side view of a tape feeder according to the present invention

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

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

FIG. 5 is a partial perspective view of the drive arm of the tape feeder according to the present invention.

[Fig. 6] Partial cross-sectional view according to the present invention

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

FIG. 8 is a partial cross-sectional view of the tape feeder according to the present invention.

[Figure 9]
Partial side view of conventional tape feeder

FIG. 10 is a partial plan view of a conventional tape feeder.

[Fig. 11] Partial sectional view of a conventional tape feeder

[Explanation of symbols]

1 Base 2　Tape 3 Supply reel 4 Pitch feeding means 22 Cover plate 25 Spring material 31 Engagement means 33 Spring material

Claims (1)

[Claims] Claim 1: A base for guiding a tape containing electronic components; a tape supply reel provided at the rear of the base; and tape pitch feeding means provided at the front of the base. In the tape feeder, a cover plate is provided to cover the tape, which is pitch-fed along the top surface of the base, from above at the pick-up position of the transfer head, and one end of the cover plate is attached to the tip of the base. A spring member is rotatably attached to the side of the cover plate, and a spring member is provided to bias this end portion downward, and an engagement member is provided on the base side that detachably engages with the other free end of the cover plate. What is claimed is: 1. A tape feeder comprising: a coupling means; and a spring member that biases the free end portion downward.