KR20020047860A - Tape feeder for chip mountor - Google Patents

Abstract

PURPOSE: A tape feeder for a device mounter is provided to maintain the tension of a top cover by providing a roller on a driving unit. CONSTITUTION: A carrier tape transfer unit(20) is installed on a side of a frame(1) so as to be capable of rotating and includes a sprocket(22) for transferring a carrier tape(2) intermittently. A top cover discharge unit(40) is installed on the other side of the frame(1), discharges a top cover peeled from the carrier tape(2), and includes a pair of discharge gears(41,42). The top cover is inserted into the discharge gears(41,42). A driving unit(50) drives simultaneously at least one discharge gear among the sprocket(22) and the pair of discharge gears(41,42). The driving unit(50) includes a worm wheel(58), a worm gear(57), a second roller(64), a worm wheel(63), a worm gear(62), and a driving motor(52) for driving simultaneously the worm gears(57,62).

Description

Tape feeder for chip mounter

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape feeder of a component mounter, and more particularly, to a component mount having a discharging means for discharging the top cover peeled off from the carrier tape of the component mounter. The present invention relates to a tape feeder.

In general, release products such as semiconductor chips are difficult to withdraw one by one in a loaded state, and are vulnerable to foreign substances such as dust, so that the semiconductor chips 100 are located in mutually isolated storage spaces 2a as shown in FIG. 1. It is distributed in the form of a carrier tape 2 in which a plurality of rows are separated and stored in a row, and the upper part thereof is sealed by the top cover 2b, and a plurality of transfer holes 2c are formed at predetermined intervals on one side.

The carrier tape of the component mounter allows the top cover 2b to be separated in stages by a tape feeder of the component mounter so that the chip is supplied to the mounter. The tape feeder of the component mounter is divided into a method of winding the top cover and a method of discharging the top cover to the outside according to a method of removing a separate top cover.

The tape feeder of the component mounter of the top cover winding method of the top cover removal method, that is, the electronic component feeder is disclosed in US Pat. No. 5,531,859.

The tape feeder is provided with a supply means for supplying a carrier tape, a conveying means for conveying a carrier tape from a supply means to a mounting position at a predetermined pitch, and simultaneously with the conveying means for winding up the top cover from the carrier tape. And a winding means, a shuttle rod connecting the winding means and the conveying means, and an actuator for reciprocating the shuttle rod to drive the winding means and the conveying means. Means for winding the top cover includes a take-up reel assembly and a planetary gear that is connected to a shaft interlocked with the take-up reel assembly and rotates in only one direction.

In the electronic component feeder, as the top cover is wound around the take-up reel, the winding diameter of the take-up reel is gradually increased so that the winding force of the top cover may be changed, and in this case, the pickup position at the pick-up point may be shifted, so that the tape feeder There is a problem that can adversely affect the supply of.

As the top cover is discharged, as shown in FIG. 2, the pair of wheels 11 and 12 that are in close contact with each other rotate intermittently so that the top cover 2b sandwiched therebetween is discharged. However, this method is moved by the frictional force between the two wheels (11) 12, the excessive force is applied to the top cover may cause a sliding phenomenon between the two wheels. In this case, there is a problem that the top cover is splashed or the discharge force of the top cover is suddenly changed so that the position at the pick-up point may be changed.

The present invention is to solve the above problems, to provide a tape feeder for the component mounter to maintain a constant tensile force for discharging the top cover of the tape feeder, and simultaneously discharging the top cover while transferring the carrier tape as one motor There is a purpose.

1 is a perspective view showing a carrier tape for a general component mounter,

Figure 2 is a perspective view showing a conventional top cover discharge means,

3 is a perspective view showing a tape feeder for a component mounter according to an embodiment of the present invention;

Figure 4 is a perspective view showing a tape feeder for a component mounter according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

22; Sprocket 31; Ratchet

41; First discharge gear 42; Second discharge gear

52; Drive motor 57; Worm Gears for Transfer

62, 162; Exhaust worm gear 64; 2nd roller

65; First roller 71; Slider

The present invention for achieving the above object, the frame; A carrier tape conveying means rotatably installed at one side of the frame and having a sprocket for conveying the carrier tape intermittently; A top cover discharging means installed on the other side of the frame to discharge the top cover peeled from the carrier tape, the top cover discharging means having a pair of discharging gears interposed between the top cover; And a driving means for simultaneously driving the sprocket and at least one discharge gear of the pair of discharge gears.

In addition, the carrier tape conveying means is characterized in that it further comprises a reverse rotation preventing means for preventing the reverse rotation of the sprocket.

In addition, the driving means is friction contact with the transfer worm wheel coaxially installed with the sprocket, the transfer worm gear meshed with the transfer worm wheel, and the first roller installed coaxially with the discharge gear on one side. Driving the second roller, the discharge worm wheel coaxially installed with the second roller, the discharge worm gear meshed with the discharge worm wheel, the transfer worm gear and the discharge worm gear at the same time. It characterized in that it comprises a drive motor to.

Hereinafter, a tape feeder for a component mounter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 3, a tape feeder for a component mounter according to an exemplary embodiment of the present invention includes a frame 1 and a carrier tape transfer means 20 installed at one side of the frame to transfer the carrier tape to a predetermined pitch. A top cover discharging means 40 installed on the other side of the frame to discharge the top cover peeled off from the carrier tape, a driving means 50 simultaneously driving the carrier tape transfer means and the top cover discharging means and the frame; It is provided on the upper side and provided with a shutter means 70 to prevent the separation of parts.

The carrier tape conveying means 20 is provided with a rotating shaft 21 on one side of the frame 1, the rotating shaft 21 is coupled to the feed hole (2c) of the carrier tape 2, the carrier tape The sprocket 22 which transfers to a predetermined pitch is provided. Then, the reverse rotation preventing means 30 is installed in the frame 1 to prevent the reverse rotation of the sprocket 22. The reverse rotation preventing means 30 includes a ratchet 31 provided on the rotating shaft of the sprocket 22 and a stopper 32 provided on the frame 1. The stopper 32 is engaged with the ratchet 31 to prevent reverse rotation. Then, the rotation angle detecting means 80 is installed on the frame 1 to detect the rotation angle of the sprocket 22. The rotation angle detecting means 80 includes an encoder 81 installed in the driving means and a sensor 82 for sensing the encoder. In addition, the rotation angle detecting means 80 may be formed using a sensor by forming a slot on the sprocket 22, the ratchet 31 and the like and using them as pulse plates. The encoder 81 is preferably provided at one end of the shaft of the drive motor 52 or the shaft of the worm gear 57 for transfer.

The top cover discharging means 40 is provided with the first discharge gear 41 and the second discharge gear 42 meshed with each other on the other side of the frame 1, and between the first discharge gear and the second discharge gear. The cover 2b is fitted and discharged.

The drive means 50 is supported by the drive motor 52 is supported by a drive motor support member 51 installed in the frame (1). The first gear 53 is installed on the rotating shaft of the drive motor. A transfer medium gear 54 is installed in engagement with the first gear and the discharge medium gear 59. The feed gear shaft 55 of the transfer medium gear is supported by the feed gear shaft support member 56. A worm gear 57 for transfer is installed on the same axis as the transfer gear shaft. A transfer worm wheel 58 meshed with the transfer worm gear is installed coaxially with the sprocket 22. The ratchet 31 is provided on the coaxial of the transfer worm wheel and the sprocket. The ratchet engages with the stopper 32 provided in the frame to prevent reverse rotation of the coaxial sprocket. That is, the sprocket 22 is rotated by the rotational force of the drive motor 52, and the carrier tape 2 is transferred by preventing the reverse rotation by the reverse rotation preventing means 30 having the latch and the stopper.

An end of the discharge gear shaft 60 is installed on the coaxial axis of the discharge medium gear 59 installed in engagement with the transfer medium gear 54. The discharge gear shaft 60 of the discharge medium gear is supported by the support member 61 for the discharge gear shaft. Discharge worm gear 62 is installed on the coaxial end of the other end of the discharge gear shaft. Discharge worm wheel (63) is installed in engagement with the discharge worm gear. The second roller 64 is installed on the coaxial of the discharge worm wheel. The first roller 65 in frictional contact with the second roller is installed. The other end of the first discharge lever 66 is fixed to the other side of the frame. At the end of the first discharge lever, a first discharge lever spring 66a for elastically biasing the first roller 65 toward the second roller 64 is provided. A first discharge gear 41 is provided on the coaxial axis of the first roller provided at the other end of the first discharge lever 66. In addition, a second discharge gear 42 which rotates in engagement with the first discharge gear is installed. An end of the second discharge lever 67 is fixed to the other side of the frame. At the end of the second discharge lever, a second discharge lever spring 67a for elastically biasing the second discharge gear 42 toward the first discharge gear 41 is provided. At the other end of the second discharge lever 67, a rotation shaft of the second discharge gear 42 is installed. The second discharge gear 42 uses a one-way clutch to prevent reverse rotation. The top cover 2b is discharged by being interposed between the first discharge gear 41 and the second discharge gear 42. That is, the sliding phenomenon between the first discharge gear and the second discharge gear is prevented by the frictional contact between the second roller 64 and the first roller 65, and the top cover 2b is discharged.

The shutter means 70 is provided with a guide portion (not shown) on the upper portion of the frame 1, the slider 71 is provided to slide to the sprocket 22 side. A conveying member 72 extending from the slider is engaged with the slider and the conveying member to connect a ball screw 73 for moving the conveying member. A shutter drive motor 75 for forward and reverse rotation of the ball screw 73 is supported by a support member 74 for a shutter drive motor provided in the frame 1. That is, the slider moves back and forth by the forward and reverse rotation of the shutter driving motor, thereby preventing the semiconductor chip 100 from being separated when the carrier tape 2 and the top cover 2b are separated.

Referring to the operation of the tape feeder for a component mounter according to the present invention configured as described above are as follows.

In order to remove the top cover 2b of the carrier tape by using a component mounter feeder and move it to a predetermined pitch, the driving motor 52 rotates the first gear 53 to move the transfer medium gear 54. Rotate By this rotation, the transfer worm gear 57 rotates and the transfer worm wheel 58 engaged with the rotation rotates, and the sprocket 22 and the ratchet 31 installed on the coaxial axis of the transfer worm wheel rotate. Let's do it. The sensor 82 senses the rotation angle of the sprocket 22 as the sensor 82 senses the encoder 81 installed at one end of the shaft of the transfer worm gear 57 which rotates, and the sprocket 22 is desired. Rotate by position The carrier tape 2 is conveyed by the rotation of the sprocket, and is reversed by a reverse rotation preventing means including a stopper 32 provided in the frame 1 and a ratchet 31 provided coaxially with the transport worm wheel. Rotation is prevented. By the driving force of the drive motor 52, the sprocket 22 is conveyed slightly more than the desired position and finely reversed again. In this case, the ratchet 31 provided on the coaxial shaft of the sprocket 22 is at a predetermined position by the stopper 32 and can no longer be reversed. That is, the final rotation angle of the sprocket 22 is accurately determined by the reverse rotation preventing means 30 and the rotation angle detecting means 80.

The discharge medium gear 59 is rotated by the driving force of the drive motor 52, and the discharge worm gear 62 is also coaxially installed. The discharge worm wheel 63 is driven by the rotation of the discharge worm gear, and the second roller 64 attached to the coaxial shaft of the discharge worm wheel rotates. The first roller 65 rotates by the frictional force with the second roller. Here, the slip amount between the first roller and the second roller is determined by the material between the rollers and the elastic bias of the first roller by the first discharge lever spring 66a. In addition, the first discharge gear 41 installed on the coaxial shaft of the first roller is driven by the rotation of the first roller 65, and the top cover (b) is engaged by the engagement between the first discharge gear and the second discharge gear 42. 2b) is discharged. That is, the discharge of the top cover is controlled by the rotational force of the first discharge gear 41 and the elastic bias of the second discharge gear by the second discharge lever spring 67a. When the discharge amount of the top cover fitted between the first discharge gear and the second discharge gear exceeds a certain amount and the top cover is excessively applied, the top cover may be slid by the sliding phenomenon between the first roller 65 and the second roller 64. Emissions and discharge forces remain constant to prevent component pick-up points from changing.

A tape feeder for a component mounter according to another embodiment of the present invention is illustrated in FIG. 4. Here, the same reference numerals as in the above-described drawings refer to the same member having the same function, and are substantially the same as described above, and thus detailed description thereof will be omitted. As shown, by using both shafts instead of the single shaft of the drive motor 52 in the driving means 50, one shaft conveys the carrier tape 2 and the other shaft ejects the top cover 2b.

The rotational force is transmitted to the first discharge gear 41 by the rotation of the discharge worm gear 162 installed directly on the other shaft of the drive motor to discharge the top cover. In this case, the carrier tape feed amount and feed force and the top cover discharge and discharge force are determined by the number of teeth between the gear trains.

As described above, the tape feeder for the component mounter according to the present invention has an advantage that the top cover can be discharged by a predetermined force and a predetermined amount by including a sliding roller in the driving means for discharging the top cover. In addition, there is an advantage in that the combination of the configuration of the drive means can simultaneously transport the carrier tape and discharge the top cover with a single drive motor.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims (6)

frame; A carrier tape transfer means rotatably installed at one side of the frame and having a sprocket for intermittently transferring the carrier tape; A top cover discharging means installed on the other side of the frame to discharge the top cover peeled off from the carrier tape, the top cover discharging means having a pair of discharging gears interposed between the top cover; And a drive means for simultaneously driving the sprocket and at least one discharge gear of the pair of discharge gears. The method of claim 1, The carrier tape conveying means further comprises a reverse rotation preventing means for preventing the reverse rotation of the sprocket tape feeder for component mounter The method of claim 2, The reverse rotation preventing means is a tape feeder for a component mounter, characterized in that it comprises a latch provided on the rotating shaft of the sprocket, and a stopper provided on the frame and meshed with the ratchet. The method of claim 1, The driving means may be frictionally contacted with the transfer worm wheel coaxially installed with the sprocket, the transfer worm gear meshed with the transfer worm wheel, and the first roller installed coaxially with the discharge gear on one side. 2 rollers, a discharging worm wheel coaxially installed with the second roller, a discharging worm gear meshed with the discharging worm wheel, a drive for simultaneously driving the transfer worm gear and the discharging worm gear at the same time. Tape feeder for component mounter, characterized in that it comprises a motor. The method of claim 2, And a rotation angle detecting means for detecting a rotation angle of the sprocket rotated by the driving means. The method of claim 5, The rotation angle detecting means includes an encoder installed in the driving means and a sensor for sensing the encoder, and the final rotation angle of the sprocket is determined by the reverse rotation preventing means and the rotation angle detecting means. Tape feeder for component mounters.