JP2003298289A - Tape feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape feeder employing a rotary transmission mechanism satisfying high load, long lifetime, convenient structure and low manufacturing cost. <P>SOLUTION: In the tape feeder for feeding electronic components by feeding a tape holding the electronic components pitch by pitch, a transmission gear member 11b coupled with a sprocket 11 for feeding the tape and being rotary driven by a motor 20, and a transmission gear member 16b coupled with a top tape feeding mechanism for feeding a top tape being peeled from the tape in front of the pickup position in the reverse direction and being rotary driven by the motor 20 are made of a self-lubricating metallic material. Abrasion of gears can thereby be reduced and high load, long lifetime, convenient structure and low manufacturing cost can be satisfied. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape feeder for feeding an electronic component held on a tape at a pitch and supplying the electronic component to a pickup position of an electronic component mounting apparatus. 2. Description of the Related Art In an electronic component mounting apparatus, a method using a tape feeder is known as a method for supplying an electronic component to a pickup position of a nozzle of a transfer head.
The tape feeder has a tape feed mechanism that pulls out the tape that holds the electronic components from the supply reel and feeds the pitch, and a top tape feed mechanism that sends the top tape that is peeled off from the upper surface of the tape just before the pickup position in the opposite direction. A drive mechanism is provided. In a tape feeder using a motor as a drive source of these drive mechanisms, a rotation transmission mechanism for transmitting the rotation of the motor to mechanical parts such as a sprocket for feeding the tape is required. Conventionally, as a configuration of these rotation transmission mechanisms, a method of supporting a gear made of a metal material via a bearing or a method of supporting a gear made of a resin material having self-lubricating properties without a bearing has been used. I was [0004] However, the above-mentioned method using the conventional rotary transmission component has the following problems. First, in the method of supporting metal gears through bearings, load resistance and durability are excellent, but the number of parts increases, which is disadvantageous in terms of assembly man-hours, and gears made of resin material In this method, the rotation of a high load cannot be transmitted with high accuracy by a method of supporting the shaft without a bearing. As described above, the rotation transmission mechanism used in the conventional tape feeder has a problem that it is difficult to achieve both a high load and a long life and a simple structure and a low manufacturing cost. Accordingly, an object of the present invention is to provide a tape feeder using a rotation transmission mechanism that achieves both high load and long life, and simplicity of the structure and low manufacturing cost. According to a first aspect of the present invention, there is provided a tape feeder for feeding an electronic component to a pickup position of an electronic component mounting apparatus by feeding a tape holding the electronic component at a pitch. A sprocket which meshes with holes provided in the tape at a constant pitch to feed the tape, a first gear which is coupled to the sprocket and is driven to rotate by a first motor, and which is adhered to cover the upper surface of the tape. A top tape feeding mechanism for feeding a top tape that is attached and peeled off from the tape just before the pickup position in a direction opposite to the tape feeding direction, and a second tape drive mechanism coupled to the top tape feeding mechanism and rotationally driven by a second motor. And at least one of the first gear and the second gear is made of a self-lubricating metal material. Has been produced. [0007] According to the present invention, a first motor coupled to a sprocket for feeding a tape and rotated by a first motor is used.
And / or a second gear that is coupled to a top tape feed mechanism that feeds a top tape that is peeled off from the tape just before the pickup position and that is driven to rotate by a second motor. By manufacturing by, gear wear can be reduced,
High load and long life, and simplicity of the structure and low manufacturing cost can both be achieved. 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 to which a tape feeder of one embodiment of the present invention is mounted, FIG. 2 is a side view of the tape feeder of one embodiment of the present invention,
3 is an explanatory view of a mechanism of a tape feeder according to an embodiment of the present invention, FIG. 4 is an explanatory view of an operation of a top tape feed mechanism of the tape feeder of an embodiment of the present invention, and FIG. FIG. 4 is a transmission mechanism diagram of a drive motor of a top tape feeding mechanism of the tape feeder according to the embodiment. First, an electronic component mounting apparatus will be described with reference to FIG. In FIG. 1, an electronic component mounting apparatus 1 includes:
It has two mounting stages 2. On the upstream mounting stage 2, a substrate 4
Is carried in. The electronic components picked up from the component supply unit 5 are mounted on the substrate 4 positioned on a transport path (not shown). A plurality of tape feeders 8 are mounted on the component supply unit 5. The tape feeder 8 includes the component supply unit 5
A large number of units are arranged in parallel on a feeder base 6 provided on the carriage 7, and a tape holding electronic components is pulled out from a supply reel 9 mounted on a carriage 7 and fed at a pitch. Thereby, the electronic component is supplied to the electronic component pickup position of each mounting stage 2. Next, the overall structure of the tape feeder 8 will be described with reference to FIG. As shown in FIG. 2, the tape feeder 8 is mounted on the upper surface of the feeder base 6 with the lower surface of the main body 8 a along the lower surface, and the locking portion 8 b provided to protrude downward from the main body 8 a is attached to the feeder base 6. The tape feeder 8 is fixed by being locked to the end. Locking part 8b
Has a built-in connector for connecting electric wiring such as a power supply and a control signal of the tape feeder 8 to an electric circuit of the electronic component mounting apparatus 1. By mounting the tape feeder 8 on the feeder base 6, the Connection is completed. In FIG. 2, a sprocket 11 is provided at the front end (right side in FIG. 2) of the tape feeder 8. The teeth of the sprocket 11 are tape feed holes 10d provided at a constant pitch in the tape 10 (see FIG. 3).
And the sprocket 1 by the tape feed mechanism 12
The pitch rotation of 1 causes the tape 10 having the configuration in which the top tape 10a is stuck on the base tape 10b to be pitch-fed. By this tape feeding, the tape 10 is pulled out from the supply reel 9. Tape 10 pulled out
Is guided by the tape guide 16 provided at the rear end of the tape feeder 8, guided into the main body 8a from the tape introduction hole 8c, and fed forward along the tape feed path 8d. The tip of the tape feeder 8 is the transfer head 1
7, the tape 10 is sent at a pitch below the pressing member 13 provided on the top surface of the leading end. During the pitch feed, the electronic component 18 held in the concave portion 10c of the base tape 10b is picked up by the transfer head 17 through the opening 13a provided in the pressing member 13. Prior to pickup of the electronic component 18, the top tape 10a is peeled off from the upper surface of the base tape 10b, folded back, and stored in the tape storage container 15 by the top tape feed mechanism 14. Next, the tape feed mechanism 12 and the top tape feed mechanism 14 will be described with reference to FIGS. In FIG. 3, a sprocket 11 for feeding the tape 10 at a pitch has a transmission gear member 11b (first gear).
Are integrally connected. The transmission gear member 11b is driven to rotate by a motor 20 (first motor) via a bevel gear 21. The sprocket 11 performs an intermittent rotation operation corresponding to the pitch feed operation, and the rotation stop position at the time of the intermittent rotation is mechanically positioned by a positioning mechanism 23. Pins 11a are provided on the outer periphery of the sprocket 11 at a constant pitch, and the tape is fed by rotating the sprocket 11 with the pins 11a fitted in the holes 10d provided in the tape 10. A peeling member 13b is provided in front of the pickup position of the transfer head 17, and the top tape 10a is peeled by the peeling member 13b from the upper surface of the tape 10 sent forward (to the right in the drawing). It is folded back. The folded back tape 10a is
The tape is fed into the tape storage container 15 by the rotation feed members 33 and 34 of the top tape feed mechanism 14. The rotation feed members 33 and 34 are rotationally driven by a transmission gear member 32 (second gear), and the transmission gear member 32 is
(The second motor) is driven to rotate via the bevel gear 31. As shown in FIG. 4A, the rotary feed member 3
3 and 34 respectively have flat teeth 33 on the outer circumference of the roller-shaped rotating body.
a and 34a are formed. By rotating the transmission gear member 32 with the top tape 10a sandwiched between the spur teeth 33a and 34a, the top tape 10
a is reliably fed into the tape storage container 15 without causing slippage. The motor 30, the transmission gear member 32, and the rotary feed members 33 and 34 serve as a top tape feed unit that sandwiches the top tape 10a between a pair of roller-shaped rotating bodies and feeds the top tape 10a in a direction opposite to the tape feed direction to the pickup position. ing. A tension mechanism 35 having a movable tension roller 36 is provided in front of the rotary feed members 33 and 34.
Are arranged. The tension roller 36 is held by a lever member 38 a having a fulcrum coaxial with the guide roller 37, and the peeled top tape 10 a circulates above the guide roller 37 and below the tension roller 36 and is guided rearward. . A spring 39 is coupled to the arm member 38b integral with the lever member 38a, and the lever member 38a and the arm member 38b are constantly urged downward by the spring 39. As a result, tension is applied to the top tape 10a by the tension roller 36. Referring to FIG. 4B, tension mechanism 3
Operation 5 will be described. When the top tape 10a becomes slack at the position of the tension mechanism 35, the tension roller 36 moves downward. Arm member 3 with this
8b is rotated by the urging force of the spring 39, and the dog 38c provided at the tip is displaced downward. By detecting this displacement by the photo switch 40,
The slack of the top tape 10a is detected. As soon as the slack is detected, the motor 30 is driven to rotate, whereby the slack top tape 10a is fed into the tape storage container 15 and the predetermined tape tension is maintained. Next, referring to FIG. 5, the structure of the gear used for the rotation transmission mechanism for transmitting the rotation of the motor 20 and the motor 30 will be described. Here, the tape feed mechanism 12
Transmission gear member 11b for rotationally driving the sprocket 11
Will be described. As shown in FIG.
1 is a bevel gear 2
1 is driven by a motor 20. A pin 11a is provided on the outer periphery of the sprocket 11 integrally formed with the transmission gear member 11b so as to engage with the hole 10d of the tape 10, and a side surface of the transmission gear member 11b is connected to the output shaft 20a of the motor 20. Bevel gears with which the bevel gear 21 is engaged. Here, the transmission gear member 11b is made of a self-lubricating metal material such as an oil-impregnated metal. Examples of such a metal material include an iron-based sintered material and Cu-Sn
Or a porous metal material such as a non-ferrous sintered material such as Cu-Sn-Pb or the like impregnated with lubricating oil, and lubricity such as PTFE (tetrafluoroethylene resin) instead of lubricating oil Metal material mixed with the above resin powder is used. By using such a self-lubricating metal material for the transmission gear member 11b, the transmission gear member 11b can be directly supported by the shaft member 11c. The number of parts can be reduced as compared with a structure in which the shaft is supported via a bearing, and the number of assembly steps can be reduced. Further, as compared with the case of using a gear made of a self-lubricating material such as engineering plastic, a high-load rotation can be transmitted with high accuracy, and the life of parts can be greatly extended. The transmission gear member 32 that transmits the rotation of the motor 30 to the rotation feed members 33 and 34 also has
Similarly, a metal material having self-lubricating properties is used. As described above, by using a self-lubricating metal material for the conductive gear member used in the tape feeder, it is possible to achieve both high load, long life, simple structure, and low manufacturing cost. A tape feeder that is compact and easy to maintain is realized. According to the present invention, a first gear coupled to a sprocket for feeding a tape and driven to rotate by a first motor, and a top tape peeled off from the tape before a pickup position are fed. By manufacturing at least one of the second gear coupled to the top tape feed mechanism and rotated by the second motor using a self-lubricating metal material, the wear of the gear can be reduced, and the high load can be reduced. -It is possible to achieve both long life, simple structure and low manufacturing cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electronic component mounting apparatus to which a tape feeder according to one embodiment of the present invention is mounted. FIG. 2 is a side view of the tape feeder according to one embodiment of the present invention. FIG. 3 is an explanatory view of a mechanism of a tape feeder according to an embodiment of the present invention. FIG. 4 is an explanatory view of an operation of a top tape feed mechanism of the tape feeder of the embodiment of the present invention. Transmission mechanism diagram of drive motor of top tape feed mechanism of tape feeder of form [Description of reference numerals] 1 Electronic component mounting device 8 Tape feeder 9 Supply reel 10 Tape 11 Sprocket 11b Transmission gear member 12 Tape feed mechanism 14 Top tape feed mechanism 17 Transfer head 20 Motor 21 Bevel gear 30 Motor 31 Bevel gear 32 Conduction gear members 33, 34 Rotary feed member

Continuation of front page    F term (reference) 3J009 DA15 DA16 DA18 EA06 EA16                       EA23 EA32 EB06 EC03 FA17                       FA18                 3J030 AC01 BA02 BC02 BC10 BD04                       CA10                 5E313 AA03 AA18 CD03 DD01 DD02                       DD03 DD31 DD34 DD35 DD50                       EE24 EE35 FG02 FG10

Claims (1)

Claims 1. A tape feeder for feeding electronic components to a pickup position of an electronic component mounting apparatus by feeding a tape holding electronic components at a pitch, wherein the tape feeder is provided on the tape at a constant pitch. A sprocket that meshes with the hole and feeds the tape; a first gear that is coupled to the sprocket and that is driven to rotate by a first motor; and A top tape feed mechanism for feeding a top tape to be peeled in a direction opposite to the tape feed direction; and a second gear coupled to the top tape feed mechanism and driven to rotate by a second motor; Gear, second
Wherein at least one of the gears is made of a self-lubricating metal material.