JP2014027242A - Component supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component supply device capable of improving the precision of feeding of an electric component by pitch feeding of a supply tape as much as possible.SOLUTION: There is provided a component supply device which moves an electronic component to a taking-out position by pitch-feeding a supply tape at intervals by driving a worm gear 34 engaging a worm wheel 33 provided concentrically with a sprockets 32 by a driving motor 35, the supply tape 60 being pitch-fed by the sprockets 32 at intervals of recessed parts in which electronic components are accommodated through integral rotations of the worm gear 34 accompanying, for example, intermittent integral rotations of the driving motor 35.

Description

  The present invention relates to a component supply apparatus that supplies an electronic component to an electronic component mounting apparatus that mounts the electronic component on a printed circuit board, and to a component supply apparatus that supplies a micro component using a supply tape.

  In recent years, in the production of circuit boards on which electronic components are mounted on a printed circuit board, the electronic components to be mounted have become small components, for example, with dimensions of 0.4 mm × 0.2 mm (0402). The component supply device presses the supply tape containing electronic components at a predetermined interval against the sprocket, engages the sprocket holes of the supply tape with the sprocket teeth formed on the outer periphery of the sprocket, rotates the sprocket teeth, and supplies Move the tape. And the electronic component which came to the taking-out port of the component supply apparatus is taken out by taking-out means such as a suction nozzle.

  The above-described sprocket rotates by engagement between a worm wheel gear provided on the sprocket and a worm gear using a motor as a drive source. There exists patent document 1 as such a prior art.

  As described above, when the dimensions of the electronic component are small, the feeding accuracy of the supply tape and the positional accuracy at the component take-out port of the destination become strict, but conventionally, for example, a pulley and a worm gear provided on the rotating shaft of the motor The pulley provided on the rotary shaft of the motor was connected with a belt to transmit the rotation of the motor to the worm gear. At this time, for example, the reduction ratio between the motor and the sprocket is set to 1/90 from the relationship with the feed amount of the supply tape due to the rotation of the sprocket by the driving force of the motor, and the sprocket rotates 1/90 by one rotation of the motor. 1/90 rotation of the sprocket was set to feed (for example, 2 mm) corresponding to one pitch (interval between parts) of the supply tape. That is, the supply tape is fed every pitch by intermittent rotation of the motor every rotation.

  As described above, Patent Document 1 discloses a conventional technique in which a motor is intermittently rotated and a sprocket is intermittently rotated via a worm gear.

JP 2010-219132 A

  However, conventionally, the reduction ratio between the motor and the worm gear is set to 2/3, for example, and the reduction ratio with the sprocket gear is set to a predetermined reduction ratio so that the tape is fed by a predetermined pitch by one rotation of the motor. . As a result, if the motor that stops at each rotation rotates three times, the worm gear rotates twice. During the two rotations, the worm gear stops three times by intermittent rotation of the motor, and the stop angle at the worm gear is The worm gear is positioned at 0 °, 120 ° (480 ° -360 °), 240 °, which is the position where the worm gear is stopped three times by the intermittent rotation of the motor between 720 ° which rotates twice, and three different stops. There is a position.

  In the above-described worm gear, there is a possibility that a shift of the gear position occurs mainly due to the machining accuracy due to the eccentricity of the gear, for example, at the above-mentioned three stop positions. When the gear shift occurs, the variation in the feeding tape feeding accuracy by the sprocket, that is, the variation in the position of the electronic tape storage part of the feeding tape at the component unloading position is different for each component feeding. There arises a problem that a deviation occurs in three cycles. As a result, when the electronic component to be supplied is a small component, an abnormality occurs when the electronic component is taken out from the supply tape due to the deviation of the component feed, that is, the posture of the taken out component becomes oblique, or There is a possibility that an abnormality such as sucking and picking up a surface different from the surface picked up and picked up by the suction nozzle specified in advance may occur.

  Therefore, the present invention can improve the feeding accuracy when feeding the electronic component by pitch feeding the supply tape, and avoid the occurrence of an abnormality as much as possible when the electronic component is taken out from the supply tape. It is an object of the present invention to provide a component supply device that can be used.

For this reason, the first invention of the present application is that the sprocket teeth of the sprocket and the sprocket holes provided in the supply tape for storing the electronic components at predetermined intervals are engaged, and the worm wheel provided concentrically with the sprocket. In a component supply device that drives a worm gear that engages with a drive motor and feeds the supply tape at a feed pitch for each interval, and moves an electronic component to a take-out position.
The positioning position of the worm gear where the drive motor rotates intermittently and the worm gear stops rotating due to the intermittent rotation is one rotation angle with respect to the feed pitch of the supply tape.

Further, according to the second aspect of the present invention, the sprocket teeth of the sprocket and the sprocket hole provided in the supply tape that stores the electronic components at predetermined intervals are engaged, and the sprocket is engaged with the worm wheel provided concentrically with the sprocket. In a component supply device that drives a worm gear that drives a drive motor and feeds the supply tape at a feed pitch for each interval, and moves an electronic component to a take-out position.
The supply tape is fed by the feed pitch by the sprocket every integer rotation of the worm gear due to intermittent rotation of the drive motor.

According to a third aspect of the present invention, the sprocket teeth of the sprocket and the sprocket hole provided in the supply tape for storing the electronic components at predetermined intervals are engaged, and the sprocket is engaged with the worm wheel provided concentrically with the sprocket. In a component supply device that drives a worm gear that drives a drive motor and feeds the supply tape at a feed pitch for each interval, and moves an electronic component to a take-out position.
The reduction ratio between the drive motor and the worm gear is an integer pair of 1, the drive motor is stopped at every rotation of the integer, the sprocket is rotated by intermittent rotation of the worm gear, and the supply tape is fed to the supply tape. It is characterized by feeding by the pitch.

  Furthermore, a fourth invention is characterized in that, in the component supply apparatus according to claim 3, the reduction ratio between the drive motor and the worm gear is 1: 1.

  ADVANTAGE OF THE INVENTION According to this invention, the components supply apparatus which can improve the feeding precision at the time of feeding an electronic component by pitch-feeding a supply tape can be provided.

It is a top view of the electronic component mounting apparatus which is embodiment of this invention. It is explanatory drawing of the supply tape used in embodiment. It is a figure which shows the Example of the components supply apparatus which has the characteristics in embodiment of this invention. It is an enlarged view of the component supply part shown in FIG. FIG. 5 is a vertical cross-sectional view of the center of the connecting portion of the driving belt and the rotating shaft of the worm gear in FIG.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an electronic component mounting apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view of the component supply cart 50 in the present embodiment. In the present embodiment, the electronic component mounting apparatus 1 refers to an apparatus that does not include the component supply cart 50. In the following description, the electronic component mounting apparatus 1 is simply referred to as the apparatus main body 1.

  The apparatus main body 1 is divided into a total of four blocks (reference numerals are basically only LU blocks): two blocks LU and LD on the left and right, and two blocks RU and RD on the right. Each block has a component supply area 13 in which a large number of component supply devices are provided, a mounting head 16, and a mounting head body 11 to which the mounting head is fixed and which moves on a rail 18 for left and right movement constituted by a linear motor. . Each block is provided with a component recognition camera 19 for imaging the suction holding state of the suction nozzle component in order to correct the position of the suction nozzle of each mounting head 16 when mounted on the substrate.

  The left and right blocks are each provided with a vertically moving rail 14 constituted by a linear motor in which a mounting head body 11 common to the upper and lower blocks moves up and down. In the center, there are four chutes 5 for transporting the substrate P, the upper two chutes 5c and 5d are for the upper block substrate transport line U, and the lower two chutes 5a and 5b are for the lower block. The substrate transport line D is configured.

  In such an apparatus configuration, the substrate P is distributed by the delivery unit 17 and carried into the substrate transport line U or D. The mounting head 16 is moved by the mounting head body 11, sucks a predetermined electronic component from the component supply area 13, and mounts it on the substrate P at a predetermined position. A supply component supply cart 50 on which a component supply device, which will be described later, is the main body of the present embodiment is mounted in the component supply area 3. In the following drawings, the conveyance of the substrate P is defined as the X direction, the direction perpendicular to X as the Y direction, and the direction perpendicular to X and Y as the Z direction. A direction in which the component supply cart 50 is mounted on the apparatus main body 1 in the lower block is defined as a Y + direction.

  Next, based on FIG. 2, the structure of the supply tape 60 which supplies components with the component supply apparatus by embodiment of this invention is demonstrated. There are two types of supply tape 60 as shown in FIG. Both of them basically comprise a carrier tape 61 that accommodates an electronic component in a recess 63 that is a housing portion, and a cover tape 62 that covers the carrier tape, and a sprocket hole 64 for driving the supply tape 60 is provided on one side thereof. Have.

  Type A (supply tape 60A) shown in FIG. 2A has a tape width WA of 8 mm or more, and electronic parts are placed in the recesses 63 at intervals of 2 mm, and sprocket holes 64 are provided at intervals of 4 mm. On the other hand, type B (supply tape 60B) shown in FIG. 3 (b) has a tape width WB of 4 mm, and electronic components are placed in the recesses 63 at intervals of 1 mm, and has a smaller diameter than that of type A at intervals of 2 mm. A sprocket hole 64 is provided. The minute parts are stored in Type B and used.

  Hereinafter, the component supply apparatus 2 having the characteristics in the embodiment of the present invention will be described with reference to FIG.

  The component supply device 2 is a supply tape type, for example, a component supply unit 40 that varies depending on the size of an electronic component, and another part of the component supply unit 40, and a component supply device main body 70 (hereinafter referred to as a common supply tape type). Abbreviated supply body 70).

  The supply main body 70 includes a component supply device fixing unit 2K for placing the component supply device 2 on the component supply cart 50, a state signal of the component supply device with the device main body 1 via the component supply cart 50 and the component supply cart 50, and the like. An interface 91 having a component supply device connector 2d, and a supply device control unit 90 that receives a signal from the interface 91, controls the sprocket drive unit 30, and transmits / receives a signal to / from the device main body 1.

  On the other hand, the component supply part 40 is demonstrated using FIG. 4 which expanded the part. The component supply unit 40 includes a sprocket drive unit 30 that moves the supply tape 60 and a pressing mechanism unit 20 that moves the supply tape 60 stably. The pressing mechanism unit 20 presses the supply tape 60 against a sprocket, which will be described later, with the fulcrum 21 as a fulcrum, and reliably moves the supply tape, that is, the electronic component.

  The sprocket drive unit 30 includes a sprocket 32 having sprocket teeth 31 that engage with the sprocket holes 64 of the supply tape 60, a worm wheel 33 concentrically provided on the sprocket 32, and a worm gear 34 that engages with the worm wheel 33. And a drive motor 35 for driving the worm gear 34 via the drive belt 37.

  The component supply apparatus 2 having such a configuration engages with a sprocket hole 64 provided in a supply tape 60 for storing an electronic component, and moves the electronic component to an extraction position S (see FIG. 3). Then, the apparatus main body 1 takes out the electronic components with the apparatus head 16 and mounts them on the substrate P.

  Hereinafter, the component supply apparatus will be described.

The common base 36 includes a U-shaped portion 36u having a wide width and a handle portion 36t protruding to the right side of the U-shaped portion 36u. The worm gear 34 is engaged with the worm wheel 33 at the center of a worm gear shaft 34j that is rotatably supported on both sides of the U-shaped portion 36u. The drive motor 35 is provided in a fool hole having a slight degree of freedom of movement provided in the handle portion 36t so that the fixing position can be adjusted by a bolt 35v. Further, the common base 36 is also attached to the frame 2F of the component supply device main body 2 with bolts 36v in the fool holes having some degree of freedom of movement provided on both sides of the bottom of the U-shaped portion 36u based on the adjustment result of the backlash. It is provided so that it can be fixed.

  In the above-described structure, a desired tension is applied to the drive belt 37 by adjusting the fixing position of the drive motor 35 by the bolt 35v.

  Then, the tension of the drive belt 37 is adjusted by the operator independently of the backlash adjustment of the worm wheel 33 of the worm gear 34.

  Hereinafter, the characteristics of the component supply apparatus of the present embodiment will be described.

  As shown in FIGS. 4 and 5, the first pulley 52 is attached to the rotating shaft 51 of the drive motor 35, and the second pulley 54 is attached to the end of the rotating shaft 53 of the worm gear 34 on the motor side. The drive belt 37 is passed between the first pulley 52 and the second pulley 54. The reduction ratio between the drive motor 35 and the worm gear 34 is an integer of 1. The drive motor 35 rotates intermittently and stops at each integer rotation, and repeats rotation and stop. By repeating this intermittent rotation and stop, the worm wheel 33 and the sprocket 32 are intermittently rotated at predetermined rotation angles via the worm gear 34. Further, 55 and 56 are respectively formed on the left and right sides of the first pulley 52 and the second pulley 54 to prevent the drive belt 37 from coming off.

  For example, the diameter of the portion of the first pulley 52 where the drive belt 37 is hung is equal to the diameter of the portion of the second pulley 54 where the drive belt 37 is hung (see FIG. 5), and the drive motor 35 When the drive motor 35 makes one revolution, the worm gear 34 makes one revolution, and the drive motor 35 is shown in the drawing. The worm gear 34 is stopped at a position where the rotation angle is 0 °, for example, every rotation, similarly to the drive motor 35. Each time the worm gear 34 makes one rotation, the worm wheel 33 rotates, and the rotation of the sprocket 32 causes, for example, a reference amount (for example, 1) of pitch feed, which is the interval between the recesses 63A that are electronic component storage portions on the supply tape 60A. 2mm) at the pitch. In this way, each time the worm gear 34 rotates intermittently once, the sprocket 32 rotates, and the worm gear 34 with the gear pitch adjusted is attached to the component supply device so that the supply tape 60 is fed by one pitch. It is done. In such a case, there is no need to change the sprocket 32 provided with the worm wheel 33.

  According to the embodiment described above, the reduction ratio between the drive motor 35 and the worm gear 34 is 1: 1, and the worm gear 34 is the same 1 every rotation (360 ° rotation) due to the intermittent rotation of the drive motor 35. As described in the section of the problem to be solved by the present invention, as shown in the section of the problem to be solved, the “feed tape is a reference for the feed pitch of the feed tape, for example, at a cycle of 3 times. It is possible to avoid the occurrence of rotational misalignment, i.e., variation in component feed. As a result, it is possible to improve the feed accuracy of the supply tape by the sprocket, i.e., the feed accuracy of the electronic component.

  Furthermore, a slight deviation occurs between the worm gear and the worm wheel gear due to the gear eccentricity due to the worm gear machining accuracy or the problem of the worm wheel gear machining accuracy, etc. Even if a slight rotational position (angle) deviation occurs every time the motor stops by one rotation, the deviation is always substantially constant, and the deviation can be easily corrected by a control device (not shown). The feeding accuracy of the supply tape by the sprocket, that is, the feeding accuracy of the electronic component can be improved.

  As a result, even when the electronic component supplied by the supply tape is a minute electronic component, it is possible to avoid the occurrence of an abnormality when the electronic component is taken out from the supply tape due to a component feed shift.

  In the above-described embodiment, the case where the diameter of the first pulley 52 and the diameter of the second pulley 54 are equal and the reduction ratio between the drive motor 35 and the worm gear 34 is 1: 1 has been described. The speed reduction ratio between the drive motor 35 and the worm gear 34 is not limited to 1: 1, and the rotation angle at which the worm gear 34 stops when the worm gear 34 is positioned, that is, when the worm gear rotates intermittently, is the feed pitch of the supply tape. It is only necessary to have one location with respect to the standard.

  For example, the first pulley 52 or the second pulley 54 having different diameters may be used, and the reduction ratio between the drive motor 35 and the worm gear 34 may be an integer (for example, 2) to 1. At this time, for example, when the diameter of the second pulley 54 is twice the diameter of the first pulley 52 and the drive motor 35 rotates an integer (for example, 2 rotations), when the worm gear 34 rotates once, the drive motor 35 Is controlled by the supply device control unit 90 to stop every integer rotation (for example, 2 rotations), and the worm gear 34 is rotated once every integer rotation (for example, 2 rotations) of the drive motor 35 and stopped. Each time the worm gear 34 makes one rotation, the worm wheel 33 and the sprocket 32 rotate, and the supply tape is fed by a pitch feed reference amount (for example, 2 mm at one pitch). You may make it the positioning location of the worm gear 34 become one place (every 1 rotation). The reduction ratio between the drive motor 35 and the worm gear 34 may be an integer of 1, and is not limited to 1: 1 or 2: 1, and may be 3: 1 or 4: 1. Alternatively, the drive motor 35 may be stopped every integer number of rotations, and the sprocket 32 may be rotated little by little by intermittent rotation of the worm gear 34 to feed the supply tape by the feed tape feed pitch.

  In addition, the present application is not limited to the component supply apparatus provided with one supply path for the supply tape. Each tape conveyance path may be a component supply device provided with a plurality of tape conveyance paths having a tape feeding mechanism such as a sprocket.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. It encompasses alternatives, modifications or variations.

1: Electronic component mounting device (device main body)
2: parts supply device 30: sprocket drive unit 31: sprocket teeth 32: sprocket 33: worm wheel 34: worm gear 35: drive motor 37: drive belt 40: parts supply unit 51: rotating shaft 52: first pulley 53: rotation Shaft 54: Second pulley 60: Supply tape

Claims (4)

The sprocket teeth of the sprocket and the sprocket holes provided in the supply tape that stores the electronic components at predetermined intervals are engaged, and the worm gear engaged with the worm wheel provided concentrically with the sprocket is driven by the drive motor. Then, in the component supply device for feeding the supply tape at a feed pitch for each interval and moving the electronic component to the take-out position,
The parts supply position is characterized in that the position where the drive motor rotates intermittently and the worm gear stops rotating due to the intermittent rotation is one rotation angle with respect to the feed pitch of the supply tape. apparatus. The sprocket teeth of the sprocket and the sprocket holes provided in the supply tape that stores the electronic components at predetermined intervals are engaged, and the worm gear engaged with the worm wheel provided concentrically with the sprocket is driven by the drive motor. Then, in the component supply device for feeding the supply tape at a feed pitch for each interval and moving the electronic component to the take-out position,
A component supply device that feeds the supply tape by the feed pitch by the sprocket every integer rotation of the worm gear by intermittent rotation of the drive motor. The sprocket teeth of the sprocket and the sprocket holes provided in the supply tape that stores the electronic components at predetermined intervals are engaged, and the worm gear engaged with the worm wheel provided concentrically with the sprocket is driven by the drive motor. Then, in the component supply device for feeding the supply tape at a feed pitch for each interval and moving the electronic component to the take-out position,
The reduction ratio between the drive motor and the worm gear is an integer pair of 1, the drive motor is stopped at every rotation of the integer, the sprocket is rotated by intermittent rotation of the worm gear, and the supply tape is fed to the supply tape. A component supply device that feeds by a pitch.   The component supply device according to claim 3, wherein a reduction ratio between the drive motor and the worm gear is set to 1: 1.

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