JPS62140961A - Device for feeding tape for chip type electronic part - Google Patents

Abstract

PURPOSE:To prevent excessive tensile force from being applied to a cover tape and breaking it by bringing a take-up reel into contact with a driving pulley via an elastic member, installing said take-up reel on a swingable supporting body, and energizing said supporting body in a direction in which said elastic member is brought into pressure contact with said driving pulley, by means of a spring. CONSTITUTION:When the winding quantity of a cover tape 21 get larger compared to the feeding quantity of a carrier tape 19 for example, a tensile force applied to the tape 21 which is being wound get larger. In this case, since the rotation resistance of a take-up reel 25 increases, slippage occurs between an O-ring 28 and a pulley 32 making it hard for the rotation of a first lever 7 to be transmitted to the reel 25. And, further, a supporting body 24 to which the take-up reel 25 is installed, is elastically held by means of a spring 29 while being swingable. Accordingly, when the rotation resistance of the take-up reel 25 is increased, since the supporting body 24 swings against the energizing force of the spring 29, slippage is liable to occur toward the pulley 32, thereby, preventing the breaking of the cover tape 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a feeding device for pitch-feeding a tape consisting of a carrier tape and a cover tape on which chip-shaped electronic components are taped.

[Technical background of the invention and its problems]

For example, a chip-shaped electronic component to be incorporated into a printed circuit board or the like is pitch-fed by a feeding device while being taped with a carrier tape and a cover tape. Then, the cover tape is peeled off from the carrier tape at a predetermined position, and the electronic component housed in the recess of the carrier tape is taken out by a suction nozzle provided on the arm of the robot. The above-mentioned feeding device usually consists of a feeding mechanism for pitch-feeding the carrier tape, and a winding mechanism having a winding reel for winding the cover tape while peeling it from the carrier tape each time the carrier tape is pitch-fed. There is.

Conventionally, the take-up reel of the take-up mechanism is provided with a driven gear on one axial end thereof, and is forcibly driven to rotate by a drive gear meshed with the driven gear. Therefore, a discrepancy occurs between the amount of carrier tape fed by the feeding mechanism and the amount of cover tape taken up by the take-up reel, and a large tension may be applied to the cover tape, causing it to break. In this case, even if the carrier tape is fed, the cover tape is not wound up, resulting in a problem that the electronic component cannot be taken out from the recessed portion of the carrier tape.

[Purpose of the invention]

This invention has a chip type that allows the carrier tape to be wound without breaking even if there is a discrepancy between the amount of carrier tape fed by a feeding mechanism and the amount of cover tape wound by a winding mechanism. The purpose of the present invention is to provide a feeding device for tape for electronic parts.

[Summary of the invention]

This invention includes a drive pulley that rotationally drives a winding mechanism of a feeding device, and a drive pulley that is rotatably attached to a swingable support and that contacts the outer peripheral surface of the drive pulley via an elastic material and is rotated by the drive pulley. The cover tape comprises a take-up reel that winds up the cover tape by being moved, and a spring that elastically urges the support and presses an elastic material provided on the take-up reel against the drive pulley. If the tension applied to the reel becomes too large, the take-up reel is rotated midway.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

The feeding device shown in FIG. 1 is composed of a feeding mechanism 1 and a winding mechanism 2. The feeding mechanism 1 has a case 3. A support shaft 4 having a hexagonal cross-section in the middle is rotatably supported within the distal end of the case 3. A feed gear 5 and a ratchet gear 6 are fitted in the middle of the support shaft 4 so as to be non-rotatable. Further, a midway portion of the first lever 7 is rotatably supported on the support shaft 4 . One end of the first lever 7 protrudes from the tip of the case 3, and a feed pawl 8 that engages with the ratchet gear 6 is attached to the other end by a shaft 9. For this attachment, the shaft 9 is provided with an engaging portion 12 that slidably engages with a long hole 11 formed in the case 3. Furthermore, the above first
A spring 13 is tensioned between the other end of the lever 7 and the case 3 and biases the first lever 7 in the clockwise direction shown by the arrow in FIG. Furthermore, a reversal prevention bar 14 is pivotally mounted within the case 3 and has one end engaged with the ratchet gear 6 to prevent counterclockwise rotation of the gear. A spring 15 is provided at the other end of this anti-reverse bar'-14 and biases the bar in a direction such that one end of the bar engages with the ratchet gear 6. Therefore, the first
When the lever 7 is rotated counterclockwise, the ratchet gear 6 is interlocked with this rotation by the feed pawl 8, so that the integral feed gear 5 is also interlocked via the support @4. . Note that the rotation angle of the first lever 7 is determined by the length of the elongated hole 11 formed in the case 3.

The feed gear 5 is a chip type electronic component 16 shown in FIG.
The tape 17 taped thereon is pitch-fed in accordance with the rotation angle of the feed gear 5. That is, the tape 17 is formed of a carrier tape 19 having a recess 18 formed therein, and a cover tape 21 bonded and fixed to the carrier tape 19 in a state that closes the recess 18 . Engagement holes 22 that engage with the teeth of the feed gear 5 are bored in the side of the carrier tape 19 at predetermined intervals over the entire length. Therefore, when the feed gear 5 is rotated, the tee 717 is fed by a predetermined pitch.

At the tip of the case 3, the cover tape 21 of the tape 17 is peeled off from the carrier tape 19. This cover tape 21 is bent toward the rear side of the case 3 at a contact portion 22& formed on the case 3 and guided to the winding mechanism 2. This winding mechanism 2 has a pair of first mounting plates 22 (only one of which is shown) mounted in parallel to the case 3. These first mounting plates 2
2 is non-rotatably provided with a support shaft 23, and one end of a pair of supports 24 (only one shown) is rotatably attached to this support shaft 23. A take-up reel 25 is rotatably supported at the other ends of these supports 24 via small-diameter shaft portions 26 protruding from both end surfaces thereof. This take-up reel 25
A medium-diameter shaft portion 27 is formed at one end in the axial direction, and an O-ring 28 as an elastic member is provided on the outer peripheral surface of the shaft portion 27 .

Further, a spring 29 is provided between the support body 24 and the first mounting plate 22 to bias the support body 24 in the direction of the arrow.

A second mounting plate 31 is fixed to the first mounting plate 22 . This second mounting plate 31 has a first shaft 34 on which a pulley 32 and a first gear 33 are fitted, and a second gear 35 that meshes with the first gear 33 and a one-sided clutch 35.
A second shaft 36 is fitted through a and is rotatably attached.

An O-ring 28 provided on the take-up reel 25 is in pressure contact with the outer peripheral surface of the pulley 32.

Further, one end of a second lever 37 is fixedly attached to the second shaft 36 . Therefore, if the second lever 37 is pushed down and the second gear 35 is rotated counterclockwise, the pulley 32 will rotate clockwise together with the first gear 33. O-ring 2
The winding reel 25 provided with the winding rotates in the opposite direction to the pulley 32 to wind up the cover tape 21.

Note that the second gear 35 is prevented from rotating clockwise by a one-sided clutch 35a.

Note that the first lever 7 and the second lever 37 are the pusher ( (not shown) to be pressed and rotated.

In a feeding device having such a structure, the carrier tape 1
When the electronic component 16 is taken out from the recess 18 where the cover tape 21 of No. 9 has been peeled off, that is, from the tip of the case 3, using a suction nozzle provided on the robot, the first and second levers 7.37 are It is rotated by a pusher mounted on the robot.

When the first lever 7 is rotated, the feed gear 5
are rotated by a predetermined angle in conjunction with each other, so that the tape 17 is pitch-fed. Further, when the second lever 37 rotates, the take-up reel 25 is rotated by a predetermined angle via the first and second gears 33 and 35, so that the cover tape 21 is attached to the take-up reel 25. It will be taken up.

By the way, if a discrepancy occurs between the feed rate of the carrier tape 19 and the amount of winding of the cover tape 21, for example, if the winding radius increases as the take-up reel 25 winds up the cover tape 21, the carrier tape 19 tape 1
The amount of winding of the cover tape 21 is greater than the amount of feed in 9. Then, when the cover tape 21 is wound up, the tension applied to the cover tape 21 increases.

In that case, since the rotational resistance of the take-up reel 25 increases, a slip occurs between the O-ring 28 provided on the take-up reel 25 and the pulley 32, and the rotation of the first lever 7 is inhibited. It becomes difficult to transmit the information to the winding wheel 25. Moreover, the support 2 to which the take-up hanger 25 is attached
4 is swingable and is elastically held by a spring 29. Therefore, when the rotational resistance of the take-up reel 25 increases, the support body 24 swings against the biasing force of the spring 29, so slippage is likely to occur between the support body 24 and the pulley 32. Even break the cover tape 21.

〔Effect of the invention〕

As described above, the present invention brings a take-up reel for winding a cover tape into contact with a rotationally driven drive pulley via an elastic material, and also attaches this take-up reel to a swingable support. This support body is biased by a spring in a direction in which the elastic material comes into pressure contact with the drive pulley. Therefore, if the resistance applied to the cover tape increases due to various causes, the drive pulley will slip against the elastic material of the winding roll, and the tension applied to the cover tape will increase too much, causing the cover tape to break. There is no such thing as letting it happen. In addition, since the support body is swingable and elastically biased by a spring, when the tension applied to the cover tape increases, the support body swings and the take-up reel moves toward the drive pulley. This also prevents excessive tension from being applied to the cover tape and causing it to break.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being an overall configuration diagram, FIG. 2 being a plan view of the cover tape, and FIG. 3 being a sectional view. DESCRIPTION OF SYMBOLS 1... Feeding mechanism, 2... Winding mechanism, 17... Tape, 19... Carrier tape, 21 Cover tape, 2
5... Take-up reel, 28... 0 ring, 29...
Spring, 32...Pulley. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3

Claims (1)

[Claims] a feeding mechanism that pitch-feeds a tape consisting of a carrier tape and a cover tape via the carrier tape;
The winding mechanism includes a winding mechanism that winds the cover tape every time the carrier tape is pitch-fed, and the winding mechanism includes a drive pulley that is driven to rotate and a drive pulley that is rotatably driven, and that is rotatably attached to a swingable support. a take-up reel that contacts the outer peripheral surface of the drive pulley through an elastic material and winds the cover tape by being rotated by the drive pulley; and a take-up reel that elastically biases the support body and winds the cover tape around the drive pulley. A feeding device for a tape for chip-shaped electronic components, characterized in that it is equipped with a spring that presses an elastic material provided on a take-up reel.