JP2003218587A - Electronic component mounting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic component mounting apparatus that can efficiently cut an empty tape without any troubles. <P>SOLUTION: In the electronic component mounting apparatus for picking up an electronic component from a tape feeder by a transfer head for transferring to a board, a tape cut unit 11 for pinching and cutting an empty tape T that is discharged from the tape feeder by a fixing blade 12 and a moving blade 13 is mounted on the fixing mounting section of a base 1 by a retention bracket 15 and a fixing member 15a. The tape cutting unit 11 is elastically tightened by a clamp section 17 having a rubber cushion 17c that is a buffer with elasticity in the retention bracket 15. As a result, effect of the external force causing deformation in the tape cutting unit 11 is eliminated, and the blade tip position of the cutting blade can be correctly maintained. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting apparatus for mounting an electronic component on a substrate. 2. Description of the Related Art As a method for supplying electronic components in an electronic component mounting apparatus, a method using a tape feeder is known. In this method, electronic components such as semiconductor chips are held at a constant pitch on a tape and stored in a state wound around a supply reel, and the tape is fed out at the time of mounting, so that the electronic components are transferred by a transfer head. It is supplied to the pickup position. The empty tape after the electronic components are picked up is sent out from the tape feeder by continuously feeding the tape at a constant pitch. After the empty tape is ejected from the end of the tape feeder, the empty tape is guided by a chute, cut by a tape cutting unit disposed below the feeder base, and collected in a collection box. The tape cutting unit generally includes a cutting blade that cuts an empty tape and cuts the tape, and a driving unit such as a cylinder that drives the cutting blade. The tape cutting unit is fastened and fixed to a fixed mounting surface by a fastening means such as a bolt. [0004] By the way, in order to cut an empty tape without any trouble, it is necessary that the cutting edges of the two cutting blades of the cutting unit perform a cutting operation at an appropriate gap between the cutting edges. is there. For this reason, at the time of assembling the tape cutting unit, the cutting edge is adjusted for the alignment of the two cutting blades. However, even when the tape cutting unit has been adjusted in this way, the tape cutting unit is deformed due to poor flatness of the mounting portion when mounting and fixing the electronic component mounting apparatus. Failures are likely to occur. In other words, since the tape cutting unit is fixed by bolts, if the mounting surface has poor planar accuracy, an external force such as torsion acts on the tape cutting unit, and the cutting edge position of the cutting blade is misaligned. Occurs.
If cutting is performed with the blade edge position being poor, problems such as poor cutting and breakage of the blade edge have been caused. Accordingly, an object of the present invention is to provide an electronic component mounting apparatus capable of efficiently cutting a blank tape without any trouble. According to a first aspect of the present invention, there is provided an electronic component mounting apparatus which picks up an electronic component from a component supply unit by a transfer head and transfers the electronic component to a substrate. A plurality of tape feeders for feeding electronic components to a pickup position by a transfer head by pitch-feeding tapes holding electronic components arranged in the component supply unit, and two empty tapes ejected from these tape feeders And a supporting means for supporting the tape cutting unit on the fixed mounting portion via an elastic buffer member. According to the present invention, a tape cutting unit for holding an empty tape discharged from a tape feeder between two cutting blades is supported by a fixed mounting portion via an elastic buffer member. The action of the external force that causes the deformation of the cutting unit can be eliminated, and the position of the cutting edge of the cutting blade can be maintained correctly. Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an electronic component mounting apparatus according to an embodiment of the present invention, FIG. 2 is a partial side sectional view of the electronic component mounting apparatus according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a plan view of a tape cutting unit of the electronic component mounting apparatus, and FIGS. 4 and 5 are explanatory views of a mounting structure of the tape cutting unit of the electronic component mounting apparatus according to one embodiment of the present invention. First, the structure of the electronic component mounting apparatus will be described with reference to FIGS. In FIG. 1, a transport path 2 is provided on a base 1, and the transport path 2 transports a substrate 3 and positions it at an electronic component mounting position. A component supply unit 4 is provided on the side of the transport path 2, and a plurality of tape feeders 5 are arranged in the component supply unit 4. Tape feeder 5
Supplies the electronic component to the pickup position by the transfer head 6 by feeding the tape holding the electronic component at a pitch. The transfer head 6 has a suction nozzle 6a for sucking and holding an electronic component. The transfer head 6 is horizontally moved by an X-axis table 7 (see FIG. 2) and a Y-axis table (not shown), and is moved by the suction nozzle 6a. The electronic component is taken out from the pickup position of the tape feeder 5 and is transferred and mounted on the substrate 3. A camera 9 is disposed between the component supply unit 4 and the transport path 2, and the transfer head 6 moves above the camera 9 to image the electronic component held by the transfer head 6 from below. . The position of the electronic component is recognized by performing the recognition processing on the imaging result, and when the electronic component is mounted on the substrate 3 by the transfer head 6, the mounting position is corrected based on the position recognition result. Next, the component supply unit 4 will be described. The component supply unit 4 includes a feeder base 4a, and a plurality of tape feeders 5 are mounted on the feeder base 4a. A discharge duct 10 for guiding an empty tape from which electronic components have been taken out is provided in front of the leading end of the tape feeder 5 (on the side of the transport path 2 in FIG. 1). As shown in FIG. 2, the discharge duct 10 is a duct having a wide opening on an upper surface and having a width narrowed downward. The tape feeder 5 mounted on the feeder base 4a is provided with a supply reel 5b for storing the tape holding the electronic components in a wound state.
The tape pulled out from b is guided forward in the main body 5a. Then, the empty tape T from which the electronic components have been taken out by the suction nozzle 6a of the transfer head 6 at the pickup position is discharged from the tape feeder 5 and guided downward in the discharge duct 10. A tape cutting unit 11 is provided at the lower outlet side of the discharge duct 10. The tape cutting unit 11 cuts the empty tape T guided by the discharge duct 10 into small pieces. A collection box 12 is provided below the tape cutting unit 11.
The empty tape T cut by 1 is dropped and collected in the collection box 12. Next, referring to FIG. 3, the tape cutting unit 1
1 will be described. Tape cutting unit 11
Has two cutting blades, a fixed blade 12 and a movable blade 13. The fixed blade 12 is fixed to a fixed bracket 12a, and the movable blade 13 is fixed to a holding member 13a connected to a cylinder 14 (see also FIG. 4A). By driving the cylinder 14, the movable blade 13 becomes the fixed blade 1.
Reciprocate with respect to 2. Cutting edge of fixed blade 12 and movable blade 13
The movable tape 13 is reciprocated in a state where the empty tape T is sandwiched between the cutting edges of the empty tape T, thereby cutting the empty tape T. Next, the mounting structure of the tape cutting unit 11 will be described with reference to FIG. As shown in FIG. 4A, the tape cutting unit 11 includes a vertical side surface 1 of the base 1.
It is attached to the fixed attachment part provided in a. A vertical fixing member 15 a connected to the holding bracket 15 is fixedly fastened to the fixed mounting portion by a bolt 16, and the tape cutting unit 11 is elastically fastened to the upper surface of the holding bracket 15 by a fastening portion 17. The fastening portion 17 includes a bolt 17a, a metal washer 17b, and a rubber cushion 1 as an elastic cushioning member.
7c. At the time of fastening, the bolt 17 a is screwed into the tape cutting unit 11 through the mounting hole 15 b provided in the holding bracket 15. And bolt 17
By tightening a, the tape cutting unit 11 is elastically fastened to the holding bracket 15. That is, the fastening portion 17 provided with the rubber cushion 17c, the holding bracket 15, the fixing member 15a, and the bolt 16 are support means for supporting the tape cutting unit 11 on the fixed mounting portion via an elastic buffer member. ing. Note that a rubber cushion 17c is used as a cushioning member.
In addition, a material having high elasticity or a mechanical component such as an elastomer material other than rubber or a spring member having an appropriate spring coefficient may be used. FIG. 4B shows the lower surface of the tape cutting unit 11 supported by the fixed mounting portion. The tape cutting unit 11 is in a three-point support state in which three portions on the lower surface are supported by the side surface 1a of the base 1 via the fastening portion 17, the holding bracket 15, and the fixing member 15a. This makes it possible to support the tape cutting unit 11 having an elongated shape with a long blade in the arrangement direction of the tape feeder 5 in a well-balanced manner. In the mounting structure of the tape cutting unit 11, the tape cutting unit 11 is
When the flatness of the fixed mounting portion on the side surface 1a is poor, a large external force such as twisting is not applied to the tape cutting unit 11 by elastically fastening the tape cutting unit 11 via the rubber cushion 17c. Therefore, after the tape cutting unit 11 whose blade edge has been adjusted at the time of assembly is mounted on the electronic component mounting apparatus, the positions of the blades of the fixed blade 12 and the movable blade 13 do not become out of order, and defects such as defective cutting and damage to the blade edge are prevented. Does not occur. As a mounting structure for the tape cutting unit 11, as shown in FIG. 5, a fixed mounting portion is provided on the upper surface 1b of the base 1, and a horizontal fixing member 15'a is similar to that shown in FIG. It is good also as a structure which is elastically fastened to the base 1 by the fastening part 17. In this case, the holding bracket 15 ′ connected to the fixing member 15 ′ a is attached to the tape cutting unit 11.
Fixed to. With this mounting structure, the same effect as the example shown in FIG. 4 can be obtained even when the planar accuracy of the fixed mounting portion is poor. According to the present invention, a tape cutting unit for holding an empty tape discharged from a tape feeder between two cutting blades is supported by a fixed mounting portion via an elastic buffer member. By doing so, the action of an external force that causes the deformation of the tape cutting unit can be eliminated, and the cutting edge position of the cutting blade can be maintained correctly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electronic component mounting apparatus according to an embodiment of the present invention. FIG. 2 is a partial side sectional view of an electronic component mounting apparatus according to an embodiment of the present invention. FIG. 4 is a plan view of a tape cutting unit of the electronic component mounting apparatus according to one embodiment of the present invention. FIG. 4 is an explanatory diagram of a mounting structure of the tape cutting unit of the electronic component mounting apparatus according to one embodiment of the present invention. Explanatory drawing of the mounting structure of the tape cutting unit of the electronic component mounting apparatus according to one embodiment of the present invention [Description of reference numerals] 1 base 3 substrate 4 component supply unit 5 tape feeder 6 transfer head 11 tape cutting unit 12 fixed blade 13 movable blade 15 holding bracket 15a fixing member 17 fastening portion 17a bolt 17b washer 17c rubber cushion T empty tape

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Claims (1)

Claims 1. An electronic component mounting apparatus for picking up an electronic component from a component supply unit by a transfer head and transferring the electronic component to a substrate, wherein the electronic component mounting device is arranged in the component supply unit and holds the electronic component. A plurality of tape feeders that feed electronic components to a pickup position by a transfer head by feeding a tape at a pitch, a tape cutting unit that cuts an empty tape discharged from these tape feeders by two cutting blades, An electronic component mounting apparatus, comprising: a support means for supporting the tape cutting unit on a fixed mounting portion via an elastic buffer member.