JPH09150802A - Carrier tape feed mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a tape from being dragged in between a sprocket and a fixed rail. SOLUTION: A carrier tape feed mechanism is so constituted that a continuous carrier tape 2 in which embossed parts 3 for containing independently each of a number of electronic components 1 are formed and which has feed perforations 6 bored at specified pitches along one marginal portion 5 on the longitudinal side of the carrier tape 2, is sent out in the tangent direction thereof by the rotation of a sprocket 16 while fitting feed perforations 6 to feed pins 15 of the sprocket 16. In this case, the sprocket 16 supports only the one marginal portion 5 on the longitudinal side of the carrier tape 2 from below, and a fixed rail 17 for supporting the embossed parts 3 of the carrier tape 2 and the other marginal portion 11 on the longitudinal side thereof is disposed on the side of the sprocket so as to extend from a position (a) in contact with the carrier tape 2 in a direction in which the tape is fed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier tape feeding mechanism, and more particularly, to a carrier tape for intermittently feeding a carrier tape containing a large number of electronic components in the manufacture of electronic components such as surface mount semiconductor devices. A tape feeding mechanism.

[0002]

2. Description of the Related Art For example, in the manufacture of electronic components such as surface-mounted semiconductor devices, lead molding and characteristic inspection are performed in the final steps thereof, and when the electronic components are stored after these steps, as shown in FIG. A carrier tape 2 made of resin that individually stores a large number of electronic components 1 is used. This long carrier tape 2 is formed by press molding or the like with a concave emboss 3 for accommodating the electronic component 1 at a fixed pitch. The embossing 3 containing the component 1 is sealed. Incidentally, feed holes 6 are formed at a constant pitch in one longitudinal side edge portion 5 of the carrier tape 2.

As a mechanism for transferring a large number of electronic components 1 sequentially by using the carrier tape 2,
There is a method in which the carrier tape 2 is intermittently transferred while fitting the feed claw into the feed hole 6 of the carrier tape 2 by performing a square motion of the feed claw.
However, the feeding mechanism using the feeding claws is not suitable because it is difficult to cope with the speeding up of the tape feeding due to the square motion of the feeding claws.

Therefore, in order to cope with the speeding up of tape feeding, a feeding mechanism using a sprocket is often used. The sprocket 7 of this feeding mechanism is
As shown in FIGS. 5 and 6, feed pins 8 that fit into the feed holes 6 of the carrier tape 2 are provided on the circumferential surface at the same pitch as the feed holes 6, and one longitudinal side edge portion 5 of the carrier tape 2 is provided. A first rotating body 9 supporting from below, a second rotating body 10 supporting the emboss 3 of the carrier tape 2 from below, and a third rotating body 12 supporting the other longitudinal side edge portion 11 of the carrier tape 2 from below. And are integrally formed coaxially.
Although not shown, a drive source such as a motor is connected to the rotating shaft of the sprocket 7.

A fixed rail 13 for supporting the carrier tape 2 fed from the sprocket 7 from below and holding it in a horizontal state is provided at the front position of the tape feeding by the sprocket 7. The end of the fixed rail 13 facing the first rotating body 9 of the sprocket 7 is arranged with a predetermined gap m to prevent it from interfering with the feed pin 8 of the first rotating body 9. .

In this carrier tape 2 feeding mechanism, the sprocket 7 is rotated by the operation of the drive source to feed out the carrier tape 2, while the carrier tape 2 is fed by a tension roller (not shown) at the beginning of the carrier tape 2. A certain amount of tension is applied without slackening. In this state, the carrier tape 2 is intermittently fed by the rotation of the sprocket 7 while fitting the feed hole 6 of the carrier tape 2 to the feed pin 8 of the sprocket 7 as described above. This sprocket 7
The carrier tape 2 sent out by the
While being guided by 3, the electronic component 1 is stored, sealed by the cover tape 4, and processed for component presence / absence.

[0007]

By the way, in the above-mentioned conventional feeding mechanism for the carrier tape 2, the carrier tape 2 is fed by the rotation of the sprocket 7 with a certain tension. Also, the sprocket 7
In front of the first rotating body 9, there is a gap m with the end of the fixed rail 13.

On the other hand, regarding the relationship between the feed pin 8 of the sprocket 7 and the feed hole 6 of the carrier tape 2, it is necessary to position the carrier tape 2 accurately, and therefore the clearance between the two must be set small. Therefore, under the configuration of the sprocket 7 and the fixed rail 13 described above, as shown in FIG. 7, the pitch accuracy of the feed holes 6 of the carrier tape 2 is kept in the state in which the pressing force from the rear due to the rotation of the sprocket 7 acts. Due to variations and feed resistance of the carrier tape 2 with respect to the surface of the fixed rail 13, the feed pin 8 of the sprocket 7 cannot be completely pulled out from the feed hole 6 of the carrier tape 2, and the carrier tape 2 moves between the sprocket 7 and the fixed rail 13. The phenomenon of being caught in the gap m occurs (the emboss 3 is omitted in the figure). When such a phenomenon occurs, there arises a problem that the carrier tape 2 is cut, and there is no choice but to stop the operation of the feeding mechanism.

In order to prevent the carrier tape 2 from being wound up, it may be possible to increase the clearance between the feed pin 8 of the sprocket 7 and the feed hole 6 of the carrier tape 2. 7
The feed hole 6 of the carrier tape 2 becomes too large with respect to the feed pin 8, and rattling occurs, which makes it difficult to perform accurate positioning, which is not a suitable means.

Therefore, the present invention has been proposed in view of the above problems, and an object of the present invention is to provide a carrier tape feeding mechanism capable of preventing the occurrence of tape winding between the sprocket and the fixed rail. To provide.

[0011]

As a technical means for achieving the above object, according to the present invention, an emboss for individually housing a large number of electronic components is formed, and a constant pitch is provided along one longitudinal side edge portion. In a carrier tape feeding mechanism that feeds out a long carrier tape having a feed hole formed therein in a tangential direction by rotation of the sprocket while fitting the feed hole in a feed pin of a sprocket, the sprocket is a carrier. A fixed rail that supports only one longitudinal side edge of the tape from below and supports the embossing and the other longitudinal side edge of the carrier tape is provided on the side of the sprocket and extends from the contact point with the carrier tape in the tape feeding direction. It is characterized by being arranged.

Further, the fixed rail can be extended from the contact portion of the sprocket with the carrier tape in the direction opposite to the tape feeding direction to hold the carrier tape in a horizontal state.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a carrier tape feeding mechanism according to the present invention will be described with reference to FIGS.

The sprocket feed mechanism of the present invention is
As shown in FIGS. 1 and 2, feed pins 15 that fit into the feed holes 6 of the carrier tape 2 are provided on the peripheral surface so as to project at the same pitch as the feed holes 6, and one longitudinal side edge portion 5 of the carrier tape 2 is provided. A sprocket 16 that is rotatable from below and a cross section that is fixedly arranged in close proximity to the side of the sprocket 16 and that supports the emboss 3 of the carrier tape 2 and the other longitudinal side edge portion 11 of the carrier tape 2 from below. It is composed of an L-shaped fixed rail 17. This fixed rail 17
Are arranged so as to extend in the tape feeding direction from the contact portion a with the carrier tape 2 on the side of the sprocket. In this embodiment, the carrier tape 2 is fed in the front-back direction of the contact portion a of the carrier tape 2. Are continuously provided along with to hold the carrier tape 2 in a horizontal state.
Although not shown, a drive source such as a motor is connected to the rotating shaft of the sprocket 16.

An example of a device incorporating this feeding mechanism is shown in FIG. In this apparatus, a tension roller 18 is arranged in front of the carrier tape 2 fed from the sprocket 16 of the feeding mechanism, and a heater block 19 for thermocompression bonding the cover tape 4 to the carrier tape 2 is arranged in the preceding stage.
In some cases, the cover tape 4 may be sealed and pressure-bonded.

In the apparatus incorporating the above-mentioned feeding mechanism, while the feeding hole 6 of the carrier tape 2 supplied from the previous step is fitted into the feeding pin 15 of the sprocket 16, the sprocket 16 is rotated so that the carrier tape 2 has its tangent line. Send in the direction. This carrier tape 2 sent out
Is in a state in which a constant tension is applied by the tension roller 18.

At this time, a fixed rail 17 is arranged extending laterally from the contact portion a with the carrier tape 2 on the side of the sprocket and supporting the emboss 3 of the carrier tape 2 and the other longitudinal side edge portion 11 from below. Therefore, even if the clearance between the feed pin 15 of the sprocket 16 and the feed hole 6 of the carrier tape 2 is small, the sprocket 16
Even if there are variations in the pitch accuracy of the feed holes 6 of the carrier tape 2 or the feed resistance of the carrier tape 2 to the surface of the fixed rail 17 in the state in which the pressing force due to the tape feeding of the carrier tape 2 acts, the fixed rail 17 causes the sprocket 16 to move. The feed hole 6 of the carrier tape 2 is forcibly pulled out from the feed pin 15, and the carrier tape 2 is not rolled up, and the carrier tape 2 is smoothly fed.

In this way, the electronic component 1 is supplied to the carrier tape 2 delivered by the rotation of the sprocket 16 at a contact portion a of the carrier tape 2 with the sprocket 16 by an appropriate means, and the emboss 3 of the carrier tape 2 is supplied. Is stored in. And in the sealing position,
When the carrier tape 2 intermittently transferred is stopped, the cover tape 4 is thermocompression-bonded to the carrier tape 2 by the heater block 19. Although not shown, the electronic components 1 housed in the embosses 3 of the carrier tape 2 are subjected to processing such as presence / absence inspection at an intermediate position where they are intermittently transferred while being held horizontally by the fixed rails 17. Done.

[0019]

According to the carrier tape feeding mechanism of the present invention, the sprocket supports only one longitudinal side edge portion of the carrier tape from below, and embosses the carrier tape and the other longitudinal side edge portion. Even if the clearance between the feed pin of the sprocket and the feed hole of the carrier tape is small, the fixed rail supporting the sprocket is installed on the side of the sprocket so that it extends in the tape feeding direction from the contact point with the carrier tape. The feeding hole of the carrier tape can be forcibly pulled out from the feeding pin of the carrier tape, and the carrier tape can be smoothly fed out without the winding of the carrier tape occurring, and high-speed and stable tape feeding and high-precision tape The positioning can be easily realized.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a carrier tape feeding mechanism according to the present invention.

FIG. 2 is a side sectional view of FIG.

3 is a schematic configuration diagram showing an example of an apparatus incorporating the feeding mechanism of FIG.

FIG. 4 is a perspective view showing a carrier tape.

FIG. 5 is a front view showing a conventional example of a carrier tape feeding mechanism.

6 is a side sectional view of FIG.

FIG. 7 is a side sectional view showing a state where tape winding has occurred in the feeding mechanism of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic component 2 Carrier tape 3 Embossing 5 One longitudinal side edge 6 Feed hole 11 The other longitudinal side edge 16 Sprocket 17 Fixed rail a Contact point

Claims (2)

[Claims] 1. A long carrier tape in which embossments for individually accommodating a large number of electronic parts are formed and feed holes are formed at a constant pitch along one of the longitudinal side edges of the carrier tape on a feed pin of a sprocket. In a carrier tape feeding mechanism for feeding the tangential direction by rotation of the sprocket while fitting the feed hole, the sprocket supports only one longitudinal side edge of the carrier tape from below, and embosses the carrier tape. And a fixed rail for supporting the other longitudinal side edge portion, which is disposed so as to extend in the tape feeding direction from the contact point with the carrier tape on the side of the sprocket. 2. The carrier according to claim 1, wherein the fixed rail extends from a contact portion of the sprocket with the carrier tape in a direction opposite to a tape feeding direction to hold the carrier tape in a horizontal state. Tape feeding mechanism.