JP4085711B2 - Tape joining method in tape feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tape joining method in a tape feeder that pitches an electronic component held on a tape and supplies the electronic component to a pickup position of an electronic component mounting apparatus.
[0002]
[Prior art]
In an electronic component mounting apparatus, a method using a tape feeder is known as a method of supplying an electronic component to a transfer head. In this method, a carrier tape that holds an electronic component is pulled out from a supply reel, and pitch-fed in synchronization with the mounting timing of the electronic component. When a part breakage occurs in the tape feeder during the mounting operation, a reel replacement operation for replacing the supply reel with a new one is performed.
[0003]
Recently, a tape splicing method for joining the carrier tape itself has been adopted for the reel replacement operation. According to this method, the end of the already-attached tape and the top of the new carrier tape are joined, so the work of attaching the top of the new carrier tape to the tape feeder and tape alignment The work to be performed is omitted, and there is an advantage that it is possible to save time and labor by stopping the mounting apparatus each time a component break occurs.
[0004]
In this tape splicing operation, the special tape is used to hold the end of the already installed tape and the top of the new carrier tape, and the ends of these carrier tapes are cut and abutted against each other, and the splice tape is applied to both sides. To wear.
[0005]
[Problems to be solved by the invention]
However, with the adoption of the tape splice method, the following problems have occurred. The carrier tape holding the electronic component is supplied in a state where the top tape is attached to the upper surface. In this state, the carrier tape taken into the tape feeder is exposed to the electronic component by peeling off the top tape just before the pickup position at the tip of the tape feeder, and can be picked up by the mounting head.
[0006]
In this pickup, when an electronic component held in the front and rear range of the splice position is a pickup target, a phenomenon occurs in which the electronic component adheres to the top tape due to static electricity. This electrostatic adhesion phenomenon is caused by static electricity generated by the operator pressing and rubbing with a finger when the splice tape is applied from the upper side of the top tape in the process of tape splicing.
[0007]
When this static electricity is charged to the top tape, in the case of small and light micro parts, the electronic parts adhere to the top tape, and after peeling off the top tape, the electronic parts are lifted together with the top tape, and the carrier tape reaches the pickup position. This causes a problem that there is no electronic component to be picked up. As described above, when the tape splicing method is adopted in the conventional tape feeder, there is a problem that an electronic component adheres to the top tape due to static electricity and causes a mounting error.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tape joining method in a tape feeder that can prevent a mounting error due to an electronic component adhering to a top tape due to static electricity when a tape splice method is employed.
[0009]
[Means for Solving the Problems]
Tape engagement method in the tape feeder according to claim 1, wherein the tape engagement method in the tape feeder to be supplied to the pick-up position by the transfer head of the electronic component mounting apparatus of electronic components by pitch feeding the tape holding the electronic component A main body mounted on a component supply unit of the electronic component mounting apparatus, a tape feeding mechanism provided on the main body for pitch-feeding the tape, and covering the electronic component on the upper surface of the tape. A top tape feeding mechanism for feeding the top tape peeled off from the tape before the pickup position in a direction opposite to the tape feeding direction, and a tape to be newly attached to the end of the existing tape already introduced into the main body. a tape splicing unit leading part and the operator outside of the main body portion to engagement with the finger of the top The static electricity charged in the joint portion is removed by the joining work by slidingly contacting the joining portion of the end portion of the existing tape and the beginning portion of the newly mounted tape at a position upstream from the peeling position of the tape. and a discharging means for the tape engagement process in the tape splicing unit is abutted with an end face of the tape in which the newly attached to the end face of the existing tape, adhesive in a position straddling the butt position The splicing tape is adhered from both the front and back surfaces, and the operator uses the fingers to squeeze the surface of the splicing tape while pressing it.
[0010]
The tape joining method in the tape feeder according to claim 2 is the tape feeder according to claim 1, wherein the charge eliminating means is provided in the tape feeding path of the main body.
[0011]
According to the present invention, the operator joins the end of the existing tape already introduced into the main body of the tape feeder and the head of the newly installed tape using the fingers outside the main body. charging means and, in the joint portion by the engagement work has conductive portions in sliding contact with the joint portion of the head portion of the tape to be mounted newly and trailing portions of the existing tape at a position upstream than the peeling position of the top tape By providing the static eliminating means for removing the static electricity, it is possible to prevent the top tape from being charged at the joint portion, and to prevent mounting errors due to the electronic components adhering to the top tape due to static electricity.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of an electronic component mounting apparatus to which a tape feeder according to an embodiment of the present invention is mounted, FIG. 2 is a side view of the tape feeder according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is an explanatory view of a tape splice unit of a tape feeder according to an embodiment of the present invention, and FIG. 5 is a tape introduction portion of the tape feeder according to an embodiment of the present invention. FIG. 6 is an explanatory view of the pickup operation of the tape feeder according to one embodiment of the present invention.
[0013]
First, the structure of the electronic component mounting apparatus will be described with reference to FIG. In FIG. 1, an electronic component mounting apparatus 1 includes a component supply unit 2 that supplies electronic components, and a plurality of tape feeders 4 are mounted on the upper surface of a feeder base 3 provided in the component supply unit 2. . The tape feeder 4 pulls out a carrier tape 7 holding an electronic component from a plurality of supply reels 6 set on a carriage 5 positioned below the feeder base 3, and picks up the held electronic component by a transfer head 8. Supply up to. The transfer head 8 is controlled by the control unit 11, and the electronic component picked up from the tape feeder 4 is mounted on the substrate 10 positioned on the conveyance path 9.
[0014]
Next, the structure of the tape feeder 4 will be described with reference to FIGS. As shown in FIG. 2, the tape feeder 4 is mounted on the upper surface of the feeder base 3 along the lower surface of the main body portion 4 a, and the locking portion 4 b provided to protrude downward from the main body portion 4 a is attached to the feeder base 3. The tape feeder 4 is fixed by engaging with the end. The locking portion 4b has a built-in connector for connecting electrical wiring such as a power supply and control signal of the tape feeder 4 to the electrical circuit of the electronic component mounting apparatus 1, and the tape feeder 4 is attached to the feeder base 3. As a result, the electrical connection is completed.
[0015]
In FIG. 3, a sprocket 12 is disposed at the front end (right side in FIG. 3) of the tape feeder 4. The feed pin 12a of the sprocket 12 is engaged with a feed hole 7d for tape feed provided at a constant pitch on the carrier tape 7, and the sprocket 12 is pitch-rotated by the motor 13a of the tape feed mechanism 13, whereby the top of the sprocket 12 is placed on the base tape 7a. The carrier tape 7 having a configuration in which the tape 7c is adhered is pitch-fed. By this tape feeding, the carrier tape 7 is pulled out from the supply reel 6.
[0016]
As shown in FIG. 2, the drawn out carrier tape 7 is guided into the main body 4 a from the tape introduction hole 18 provided at the rear end portion of the tape feeder 4, and is fed forward along the tape feeding path 14. . Between the supply reel 6 and the tape introduction hole 18, there is a tape splicing position 19 for joining the end of the existing tape already introduced into the main body 4a and the start of the newly installed carrier tape. Here, a tape splice unit, which will be described later, is installed if necessary.
[0017]
The tip of the tape feeder 4 is a position for picking up electronic components by the transfer head 8, and the carrier tape 7 sent as shown in FIG. 3 pitches below the pressing member 17 provided on the top surface of the tip. Sent. In the middle of this pitch feed, the electronic component P held in the recess 7b of the base tape 7a is picked up by the transfer head 8 through the opening 17a provided in the pressing member 17. Prior to picking up the electronic component P, the top tape 7c is peeled off from the upper surface of the base tape 7a, folded back, and stored in the tape storage container 16 by the top tape feeding mechanism 15.
[0018]
Next, the tape splicing unit 30 (tape joining means) disposed at the tape splicing position 19 and the tape splicing work will be described with reference to FIGS. In FIG. 5 , 30 is a splicing jig, and a holding member 32 for holding a tape is stacked on a fixing plate 31 as a base, and two symmetrical clamp members 33 </ b> A and 33 </ b> B are arranged side by side on the holding member 32. It has become the composition.
[0019]
An alignment pin 35 and a guide pin 34 are erected on the upper surface of the holding member 32. By aligning the feed holes of the carrier tapes 7A and 7B to be spliced with the alignment pins 35, and further aligning the end surfaces of the carrier tapes 7A and 7B with the guide pins 34, the carrier tapes 7A and 7B are aligned in the longitudinal direction. Are combined.
[0020]
By cutting the overlapping portion of the carrier tapes 7A and 7B in this state, the end surface E1 of the carrier tape 7A and the end surface E2 of the carrier tape 7B are brought into contact with each other. In this state, the two carrier tapes 7A and 7B are joined together by adhering the adhesive splice tape T from both the front and back sides across the butting position of the carrier tapes 7A and 7B.
[0021]
When the splice tape T is stuck, the operator presses the finger while rubbing the surface of the splice tape T, so that the splice tape T after the sticking is charged with static electricity generated by friction with the fingers. For this reason, the top tape 7c at the joint between the end of the existing tape already introduced into the main body 4a and the top of the newly mounted carrier tape is often charged with static electricity.
[0022]
In this way, when the joint portion in a state where static electricity is charged on the top tape 7c is sent through the main body 4a as it is and reaches the pickup position, the electronic component is lifted while being attached to the top tape when the top tape 7c is peeled off. Therefore, there is a problem that there is no electronic component to be picked up when the carrier tape reaches the pickup position.
[0023]
In order to prevent such problems, in the tape feeder 4 shown in the present embodiment, as shown in FIG. 2 and FIG. 4, the static elimination means for removing static electricity charged in the joint portion by the tape splicing operation is used as a top tape. It is provided at the introduction portion of the tape feeding path 14 of the main body portion 4a that is upstream of the peeling position 7c . As shown in FIG. 4 , a static elimination brush 20 (static elimination means) in which a number of fine metal wires 20a are implanted is disposed in the tape introduction hole 18 at the rear end of the main body 4a.
[0024]
When the carrier tape 7 drawn out from the supply reel 6 is introduced into the main body 4 a, the metal wire 20 a comes into sliding contact with the surface of the carrier tape 7. As a result, the static electricity charged in the joint portion of the carrier tape 7 is discharged to the grounding portion 21 connected to the main body portion 4a via the feeder base 3, and is sent along the tape feeding path 14 in the main body portion 4a. The carrier tape 7 is always in an electrically neutralized state.
[0025]
As a result, as shown in FIG. 6, when the joint portion where the splice tape T is adhered to both the front and back surfaces reaches before the pickup position, the top tape 7 c of this joint portion is peeled off. However, the phenomenon that the electronic component P in the recess 7b is electrostatically attached to the top tape 7c (see the electronic component P indicated by the broken line) does not occur. Therefore, it is possible to prevent a mounting error due to the absence of the electronic component P to be picked up when the carrier tape 7 reaches the pickup position by the transfer head 8.
[0026]
【The invention's effect】
According to the present invention, the operator joins the end of the existing tape already introduced into the main body of the tape feeder and the head of the newly installed tape using the fingers outside the main body. charging means and, in the joint portion by the engagement work has conductive portions in sliding contact with the joint portion of the head portion of the tape to be mounted newly and trailing portions of the existing tape at a position upstream than the peeling position of the top tape Since the static elimination means for removing the generated charge is provided, charging of the top tape at the joint portion can be prevented, and mounting errors due to the electronic components adhering to the top tape due to static electricity can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an electronic component mounting apparatus to which a tape feeder according to an embodiment of the present invention is mounted. FIG. 2 is a side view of the tape feeder according to an embodiment of the present invention. FIG. 4 is a side view of the pickup position of the tape feeder according to the embodiment. FIG. 4 is an explanatory view of the tape splice unit of the tape feeder according to the embodiment of the invention. FIG. 6 is an explanatory view of the pickup operation of the tape feeder according to the embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 2 Component supply part 3 Feeder base 4 Tape feeder 4a Main body part 6 Supply reel 7 Carrier tape 7c Top tape 8 Transfer head 13 Tape feed mechanism 20 Static elimination brush 30 Tape splice unit

Claims (2)

A tape joining method in a tape feeder that feeds an electronic component to a pickup position by a transfer head of an electronic component mounting apparatus by pitch-feeding a tape holding an electronic component, the component supplying section of the electronic component mounting apparatus A main body portion to be mounted, a tape feeding mechanism provided on the main body portion for pitch-feeding the tape, and a top tape that is attached to the upper surface of the tape so as to cover an electronic component and is peeled off from the tape before the pickup position The top tape feeding mechanism that feeds the tape in the direction opposite to the tape feeding direction, and the tail part of the existing tape already introduced into the main body part and the head part of the tape to be newly installed are outside the main body part. a tape splicing unit for engagement with the fingers, the existing tape at a position upstream than the peeling position of the top tape And a charge removing means for removing static electricity charged on the connecting portion by the engagement work by sliding contact with the joint portion of the head portion of the tape to be newly mounted and tail,
The tape splicing method in the tape splice unit is such that the end surface of the existing tape and the end surface of the tape to be newly mounted are in contact with each other, and the splice tape for adhesion is placed on both the front and back surfaces in a position across the abutted position. A tape joining method in a tape feeder, characterized in that joining is performed by pressing the surface of the splice tape while rubbing the surface of the splice tape using fingers. 2. The tape joining method in a tape feeder according to claim 1, wherein the static eliminating means is provided in a tape feeding path of the main body.

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