JP2013201366A - Component feeding device and adjustment method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component feeding device the rattling of which can be adjusted easily.SOLUTION: A worm gear making a first engagement with a worm wheel provided concentrically to a sprocket is driven by a drive motor, the sprocket teeth of the sprocket makes a second engagement with sprocket holes provided in a supply tape for housing an electronic component thus moving the electronic component to a take-out position. In such a component feeding device, the worm gear and the drive motor are provided so that they can be secured to a common base.

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 an adjustment method thereof, and more particularly to a component supply apparatus that is suitable for supplying a microchip and an adjustment method thereof.

  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 are miniaturized, for example, with dimensions of 0.4 mm × 0.2 mm (0402). The component supply device moves the supply tape by pressing the supply tape containing electronic components against the sprocket and engaging the sprocket holes of the supply tape with the sprocket teeth of the sprocket. 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.

  If the dimensions of the electronic component are small, the positional accuracy at the outlet will also be severe. In order to increase the positional accuracy, it is necessary to reduce the play of the sprocket teeth of the sprocket and the worm gear. Conventionally, it is necessary to separately adjust the backlash and the tension of the belt that transmits the rotation of the drive motor to the worm gear. There exists patent document 1 as such a prior art.

Special table 2010-219132 gazette

  However, conventionally, when the play and the tension are adjusted separately, the tension changes when the play is adjusted, and when the tension is adjusted, the play changes. Therefore, it is necessary to repeatedly adjust both to reduce the play. As in recent years, this adjustment, which reduces the size of electronic components, becomes more difficult and the work time is longer.

  Accordingly, an object of the present invention is to provide a component supply device and an adjustment method thereof that can easily adjust the play.

In order to achieve the above object, the present invention has at least the following features.
According to the present invention, a worm wheel concentrically provided on a sprocket and a worm gear that engages first is driven by a drive motor, and a sprocket hole provided in a supply tape that houses the sprocket teeth of the sprocket and electronic components, In the component supply apparatus that performs the second engagement and moves the electronic component to the take-out position, the first feature is that the worm gear and the drive motor are provided so as to be fixed to a common base.

  Further, the present invention adjusts the backlash of the first engagement between the worm wheel and the worm gear provided concentrically on the sprocket, drives the worm gear with a drive motor, and stores the sprocket teeth and electronic parts of the sprocket. In the adjustment method of the component supply device for moving the electronic component to the take-out position by second engagement with the sprocket hole provided in the supply tape, the worm gear and the drive motor are provided so as to be fixed to a common base, The second feature is that the play of the first engagement is adjusted.

  The third feature of the present invention is that the play of the first engagement is adjusted by adjusting the position of the common base.

  According to a fourth aspect of the present invention, the tension of the drive belt that transmits the power of the drive motor to the worm gear is adjusted, and then the play of the first engagement is adjusted.

  The fifth feature of the present invention is that the backlash of the first engagement is adjusted by rotating the other end about a rotation fulcrum provided on one end of the common base.

  Furthermore, the present invention is characterized in that the adjustment of the backlash of the first engagement is performed by pushing up the common base parallel to the sprocket.

  In the present invention, the tension may be adjusted by adjusting a fixed position for fixing the drive motor to the common base, or by adjusting a tension of a drive belt that transmits power of the drive motor to the worm gear. The seventh feature is that

  ADVANTAGE OF THE INVENTION According to this invention, the components supply apparatus which can adjust backlash easily, and its adjustment method can be provided.

It is a top view of the electronic component mounting apparatus which is embodiment of this invention. It is a perspective view of the components supply cart in this embodiment. It is explanatory drawing of the supply tape used in embodiment. It is a figure which shows the 1st 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. It is AA sectional drawing in FIG. It is a figure which shows the adjustment procedure of the play in this embodiment. It is a figure which shows the other Example of the components supply apparatus which has the characteristics in embodiment of this invention.

  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, the structure of the component supply cart 50 in this embodiment using FIG. 2 is demonstrated.

  The component supply cart 50 shown in FIG. 2 is roughly divided into a base portion 51, a component supply device fixing portion 52 for fixing the component supply device 2 shown in FIG. 4, a handle portion 53, and a component supply reel storing a component supply reel. The unit 54 is configured. The base 51 fixes the component supply cart 50 to the floor surface when the component supply cart 50 is fixed to the apparatus main body 1 and the wheel fixing portions 51a provided at the four corners for fixing the moving wheels (not shown). And a lock pin 51b.

  The component supply device fixing unit 52 is located on the upper portion of the component supply cart 50, and a component supply device fixing unit guide 52c for mounting the component supply device fixing unit 2k of the component supply device 2 shown in FIG. A component supply device signal connector 52d connected to the second component supply device connector 2d. The component supply device fixing portion guide 52c is regularly arranged on the component supply device base 52a so that a large number of component supply devices can be mounted. Each component supply device 2 is supplied with a supply tape 60 containing electronic components from a supply reel storage unit 54.

  Further, at both ends of the component supply device base 52a, when a component supply cart is inserted into the device main body 1, a component supply device that plays a role of sliding a cart guide plate (not shown) provided on the device main body 1. There is a guide 52e. The component supply device guide 52e has a positioning hole 52b for fixing the component supply cart 50 to the device main body 1. Finally, there is a handle portion 53 so that the component supply cart 50 can be moved, and the component supply cart 50 is inserted into the device main body 1 by being moved in the Y direction which is the direction of the device main body 1 by the handle 53a. At this time, the front end 53c of the side plate 53b of the handle portion 53 serves as a stopper that prevents further insertion.

  Next, the configuration of the supply tape 60 used in the embodiment of the present invention will be described with reference to FIG. There are two types of supply tape 60 as shown in FIG. Both of them basically comprise a carrier tape 61 for accommodating electronic components in the recess 63 and a cover tape 62 for covering the carrier tape, and a sprocket hole 64 for driving the supply tape 60 is provided on one side thereof.

  Type A (supply tape 60A) shown in FIG. 3A has a tape width WA of 8 mm or more, and electronic components 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 microchip is stored in Type B and used.

(Example 1 of a component supply apparatus)
Hereinafter, the 1st Example of the components supply apparatus 2 which has the characteristics in embodiment of this invention is described using 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. Abbreviated supply body 70).

  The supply main body 70 is roughly divided into a component supply device fixing portion 2K for placing the component supply device 2 on the component supply cart 50, and a component supply device for the device main body 1 via the component supply cart 50 and the component supply cart 50. An interface 91 having a component supply device connector 2d for receiving and transmitting a status signal, a supply device control unit 90 for receiving a signal from the interface 91 and controlling the sprocket drive unit 30 to exchange signals with the device main body 1; Have.

  On the other hand, the component supply part 40 is demonstrated using FIG. 5 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 that stores an electronic component, and moves the electronic component to an extraction position S (see FIG. 4). Then, the apparatus main body 1 takes out the electronic components with the apparatus head 16 and mounts them on the substrate P.

The first feature of the first embodiment is that the worm gear 34 and the drive motor 35 are provided so as to be fixed to the common base 36.
The second feature is that a common base position adjusting mechanism 41 is provided which can adjust the engagement of the worm gear 34 with the worm wheel 33 by adjusting the position of the common base 36, that is, can adjust the play. .

  The first feature 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 play. It is provided so that it can be fixed.

  In the above-described structure, a desired tension can be applied to the drive belt 37 by adjusting the fixed position of the drive motor 35 by the bolt 35v. Since the worm gear 34 and the drive motor 35 are integrally fixed to the common base 36, the desired tension does not change even if the fixing position of the common base 36 is adjusted, that is, the backlash is adjusted.

  As a result, according to the first embodiment, the tension of the drive belt 37 can be adjusted independently of the worm wheel 33 and the backlash adjustment of the worm gear 34.

Next, the second feature will be described with reference to FIGS. 6 is a cross-sectional view taken along line AA in FIG. The common base position adjustment mechanism 41 includes a rotation fulcrum 42 of the common base 36 provided on the drive motor 35 side, an eccentric pin 43 provided on the opposite side of the rotation fulcrum 42, and an eccentric pin 43 in the U-shaped portion 36u. The eccentric rod 43b has an insertion portion that rotates. The insertion part is
The female screw hole 45 provided in the protrusion 2Ft of the frame 2F and the female screw hole 45 and an eccentric hole 46 that is eccentric are provided in the common base 36. Reference numeral 34h denotes a shaft hole of the worm gear shaft 34j.

  In addition to the eccentric rod 43b, the eccentric pin 43 has a head portion 43h that rotatably fixes the eccentric rod 43b, and a driver operation groove 43s provided in the head portion 43h. The eccentric rod 43b has a male screw portion 43m that engages with the female screw hole 45 at the tip, and a sliding rod 43d that is eccentric with the female screw hole 45. The range in which the play can be adjusted can be set according to the degree of eccentricity of the eccentric rod 43b. Further, the ease of adjusting the backlash can be adjusted depending on the diameter of the sliding bar 43b.

  In the above-described structure, the eccentric pin 43 is rotated in the direction of the arrow B, the common base 36 is slid along the protrusion 2Ft of the frame 2F, and the engagement between the worm gear 34 and the worm wheel, that is, the backlash is adjusted.

  FIG. 7 is a diagram summarizing the looseness adjustment procedure according to the above structure. First, the fixing position of the common belt 36 of the drive motor 35 is adjusted, and a desired tension is applied to the drive belt 37 (S1). Next, the eccentric pin 43 is operated to adjust the play of the worm gear 34 with respect to the worm wheel (S2). That is, basically, the backlash can be easily adjusted in two steps.

(Other embodiments of the component supply apparatus)
In addition to the first embodiment described above, an embodiment is conceivable. For example, first, regarding the tension adjustment of the driving belt 37, the driving motor 35 is fixed, and the tension of the driving belt 27 that transmits the motive power of the driving motor 35 to the worm gear 34 is adjusted as shown in FIG. A tension adjusting mechanism 48 for adjusting is provided. The tension adjusting mechanism 48 shown in FIG. 8A adjusts the tension of the drive belt 27 by providing a female screw 48f on a fixing member (not shown) of the component supply device 2 and rotating the male screw 48m.

  Second, the common base position adjustment mechanism and the accompanying adjustment method. For example, the rotation position 42 and the position of the eccentric pin 43 are reversed and adjusted. 8B includes a linear motion guide 47 provided between the common base 36 and the frame 2F, and a push-up means 49 that pushes up the common base along the linear motion guide 47. Have As the push-up means 49, for example, as in FIG. 8A, there is a method in which a male screw 49m and a female screw 49f are provided, the male screw 49m is rotated, and the common base 36 is pushed up in parallel with the sprocket for adjustment.

  According to the embodiment described above, first, by providing a common base that can fix the worm gear 34 and the drive motor 35 in common, the adjustment of the backlash can be performed without repeatedly adjusting the tension and the backlash. Easy to do.

  Secondly, according to the embodiment described above, it is possible to easily adjust the play by providing the common base position adjusting mechanism.

  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: Component supply device 13: Component supply area 16: Mounting head 20: Pressing mechanism unit 30: Sprocket drive unit 31: Sprocket teeth 32: Sprocket 33: Worm wheel 34: Worm gear 35: Drive motor 36: Common base 37: Drive belt 40: Parts supply unit 41: Common base position adjustment mechanism 42: Rotation fulcrum 43: Eccentric pin 47: Linear motion guide 48: Male screw 50: Parts supply cart 60: Supply tape 64: Sprocket hole 70: Parts supply device main body (supply main body) 90: Supply device control unit P: Board

Claims (10)

A worm gear concentrically provided on the sprocket is driven by a drive motor with a worm gear that engages first, and a sprocket hole provided in a supply tape that houses the sprocket teeth and electronic parts of the sprocket and a second engagement. In the component supply device that moves the electronic component to the take-out position by combining,
The component supply device, wherein the worm gear and the drive motor are provided so as to be fixed to a common base.   The component supply apparatus according to claim 1, further comprising a common base position adjustment mechanism that adjusts a position of the common base to adjust a play of the first engagement.   The component supply apparatus according to claim 2, wherein the common base position adjusting mechanism includes a rotation fulcrum provided on one end side of the common base and an eccentric pin provided on the other end side.   The common base position adjusting mechanism includes a linear motion guide provided between the common base and a fixing portion of the component supply device, and has a push-up means for pushing up the common base with respect to the fixing member. The component supply apparatus according to claim 2.   Adjustment of the tension of the drive belt that transmits the power of the drive motor to the worm gear is performed by adjusting a fixed position for fixing the drive motor to the common base, or of the drive belt that transmits the power of the drive motor to the worm gear. The component supply apparatus according to claim 1, wherein the tension is adjusted. Adjusting the backlash of the first engagement between the worm wheel and the worm gear concentrically provided on the sprocket, the worm gear is driven by a drive motor, and provided on a supply tape for storing the sprocket teeth and electronic parts of the sprocket In the adjustment method of the component supply device for moving the electronic component to the take-out position by second engagement with the sprocket hole,
An adjustment method for a component supply device, wherein the worm gear and the drive motor are provided so as to be fixable to a common base, and the play of the first engagement is adjusted.   The adjustment method of the component supply apparatus according to claim 6, wherein the tension of the drive belt that transmits the power of the drive motor to the worm gear is adjusted, and then the play of the first engagement is adjusted. .   The component supply device according to claim 7, wherein the adjustment of the play of the first engagement is performed by rotating the other end around a rotation fulcrum provided on one end of the common base. Adjustment method.   The adjustment method of the component supply apparatus according to claim 7, wherein the adjustment of the play of the first engagement is performed by pushing up the common base in parallel with the sprocket.   The adjustment of the tension is performed by adjusting a fixed position for fixing the drive motor to the common base, or by adjusting a tension of a drive belt that transmits power of the drive motor to the worm gear. The adjustment method of the components supply apparatus of Claim 6 or 7.

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