JP3586303B2 - Electronic component mounting device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a tape cutting device that appropriately cuts a carrier tape after an electronic component is sucked in, for example, an electronic component mounting device.
[0002]
[Prior art]
In the electronic component mounting device, the electronic component to be mounted on the substrate is supplied in a state housed in a carrier tape, and the carrier tape after the electronic component is picked up is appropriately cut by a tape cutting device so as not to be in the way, and is sucked. Discarded via duct.
[0003]
FIG. 6 shows such a conventional tape cutting apparatus. The tape cutting device 100 includes a cam mechanism 101 including a cam 103 fixed to a camshaft 102 on the input side and a cam follower 104 that comes into contact with the cam 103, a link mechanism 105 connected to the cam follower 104, and a tape mechanism formed at the tip of the link mechanism 105. And a coil spring 107 for urging the tape cutter 106 in the cutting direction. The tape cutter 106 is opened and closed by a link mechanism 105 like a pair of scissors with respect to the fixed blade 108 facing the same. When the carrier tape C is introduced, the tape cutter 106 is opened by the cam mechanism 101 to cut the carrier tape C. At this time, the closing operation (cutting operation) is performed by the coil spring 107. That is, the coil spring 107 causes the tape cutter 106 to perform a cutting operation, and presses the cam follower 104 to the cam 103 via the link mechanism 105 so that the operations of the link mechanism 105 and the tape cutter 106 are restricted by the cam 103 to operate. Functioning.
[0004]
[Problems to be solved by the invention]
In such a conventional tape cutting apparatus 100, even if the electronic component remaining on the carrier tape C due to a suction error is bitten by the tape cutter 106, the cam follower 104 biased by the coil spring 107 only floats from the cam 103. Accordingly, the operation of the cam mechanism 101 is allowed, and the link mechanism 105 and the like can be prevented from being damaged. However, since the cam follower 104 is constantly pressed against the cam 103 by the coil spring 107, the cam 103 and the cam follower 104 are easily worn. Particularly, the coil spring 107 has a strong spring force for causing the tape cutter 106 to perform a cutting operation, and the cam follower 104 is strongly pressed against the cam 103, so that the life of the cam mechanism 101 is shortened.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape cutting device that can prevent damage to a link mechanism and the like and can minimize wear of a cam and a cam follower while maintaining the constraint of a cam follower with respect to a cam. And
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a component supply device having a tape reel wound with a carrier tape in which electronic components are loaded at a predetermined pitch, and a component feeder mounted on an outer peripheral portion of a turntable from the carrier tape. A plurality of mounting heads for sucking and mounting on the substrate, a cam mechanism on the input side, a link mechanism connected to the cam mechanism, and a tape cutter connected to the link mechanism. Power is transmitted from a drive source of a rotary table to a cam mechanism in an electronic component mounting apparatus having a tape cutting device for performing a cutting operation of a carrier tape after an electronic component is attracted to a tape cutter via a mechanism. composed of positive motion cam mechanism that is driven to rotate, the link mechanism to permit actuation of the cam mechanism when the cutting operation of the tape cutter is prevented damping means Characterized by providing.
[0007]
[Action]
According to the electronic component mounting apparatus of the first aspect, the cam mechanism is constituted by the positive cam mechanism that is driven and rotated by the power transmitted from the drive source of the rotary table, so that the biasing force is applied to the cam of the cam mechanism. The cam follower can be operated without being actuated. Further, by providing the link mechanism with buffer means for allowing the operation of the cam mechanism when the cutting operation of the tape cutter is prevented, even if a hard object is bitten by the tape cutter, the operation of the cam mechanism is permitted by the buffer means. It is possible to avoid applying a large force to the link mechanism and the like.
[0008]
【Example】
Hereinafter, an electronic component mounting device equipped with a tape cutting device according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of the electronic component mounting apparatus, and FIG. 2 is a plan view thereof. As shown in FIGS. 1 and 2, the electronic component mounting apparatus 1 includes a supply system 3 for supplying an electronic component A and a mounting system 4 for mounting the electronic component A on a board B, on both sides of the apparatus main body 2. It is configured. The apparatus main body 2 is provided with an index unit 11 serving as a main body of a drive system, a rotary table 12 connected to the index unit 11, and a plurality of (12) mounting heads 13 mounted on an outer peripheral portion of the rotary table 12. The rotary table 12 is intermittently rotated by the index unit 11 at an intermittent pitch corresponding to the number of the mounting heads 13. When the rotary table 12 rotates intermittently, each mounting head 13 appropriately faces the supply system 3 and the mounting system 4 and, after sucking the electronic component A supplied from the supply system 3, rotates and conveys the electronic component A to the mounting system 4. This is mounted on the substrate B introduced in the above.
[0009]
The supply system 3 has a number of component supply devices 21 corresponding to the type of the electronic component A to be mounted on the board B. The component supply device 21 is slidably guided by a pair of guide rails 22, 22. 23 is provided side by side and detachably. A ball screw 24 is screwed into the supply table 23 in the sliding direction, and the supply table 23 is moved forward and backward by a forward / reverse rotation of a feed motor 25 connected to one end of the ball screw 24, so that the mounting head 13 The component supply device 21 is selectively brought to the suction position. Each component supply device 21 includes a tape reel 26 on which a carrier tape C for electronic components is wound, a tape feeder 27 for unwinding the carrier tape C from the tape reel 26, and a cover tape reel for winding a cover tape of the carrier tape C. 28.
[0010]
The electronic component A is loaded at a predetermined pitch on a carrier tape C composed of a tape body and a cover tape, and is sucked by the mounting head 13 with the cover tape removed. The tape feeder 27 and the cover tape reel 28 are operated in synchronism with the rotary table 12 by the tape feed driving device 14 provided in the apparatus main body 2 to intermittently feed the carrier tape C and intermittently cover the cover tape prior to the suction. And wind it up. The carrier tape C unwound from the tape reel 26 by the tape feeder 17 is intermittently fed according to the loading pitch of the electronic components A, and the cover tape is peeled off immediately before the suction position. Then, the electronic component A that has reached the suction position is sucked by the mounting head 13 descending as needed. On the other hand, the peeled cover tape is wound on a cover tape reel 28, and the tape body after the electronic component A is sucked is finely cut by the tape cutting device 15 provided in the device body 2 to a size corresponding to the loading pitch. It will be cut off.
[0011]
The mounting system 4 includes an XY table 31 for moving the mounted substrate B in the X-axis direction and the Y-axis direction, a carry-in conveyance path 32 and a carry-out conveyance path 33 disposed before and after the XY table 31, and a carry-in conveyance path 32. The upper substrate B is constituted by an XY table 31 and a substrate transfer device 34 for simultaneously transferring the substrate B on the XY table 31 to an unloading conveyance path 33. The XY table 31 includes a Y-axis table 35 on which the substrate B is directly mounted, and an X-axis table 36 on which the Y-axis table 35 is mounted. The Y-axis table 35 is driven by a Y-axis motor 37 via a screw mechanism. The X-axis table 36 is moved forward and backward by the X-axis motor 38 via the screw mechanism. At this time, the X-axis motor 38 and the Y-axis motor 37 are controlled in forward and reverse rotations by a control device (not shown) to move the board B appropriately in the X-axis direction and the Y-axis direction. To the mounting position of the mounting head 13.
[0012]
The substrate B sent to the downstream end of the carry-in transport path 32 is transferred onto the XY table 31 by the substrate transfer device 34, and at the same time, the substrate B on the XY table 31 on which the mounting of the electronic component A is completed is The transfer device 34 transfers the sheet to the unloading conveyance path 33. The board B introduced on the XY table 31 is appropriately moved by the XY table 31, and corresponding to the electronic components A sent one after another by the respective mounting heads 13, the component mounting part faces the mounting position. The electronic component A is received from each mounting head 13. In this way, the board B on which all the electronic components A have been mounted is again transferred from the XY table 31 to the unloading transfer path 33 by the board transfer device 34, and at the same time, a new board B is transferred to the transfer path. 32 to the XY table 31.
[0013]
The apparatus main body 2 has an index unit 11 serving as a main body of a drive system on a support base 16, and the index unit 11 is driven at a constant speed input from a drive motor (not shown) serving as a power source via a worm speed reducer. The rotary motion is converted into power to rotate the rotary table 12 intermittently, and is synchronized (interlocked) with the intermittent cycle of the rotary table 12 via an output shaft (not shown). The cutting device 15 is operated, and the mounting head elevating devices 51 and 52 and the nozzle selecting device 53, which will be described later, are operated.
[0014]
The turntable 12 is fixed to a vertical shaft 41 hanging from the index unit 11, and is intermittently rotated clockwise in a plan view. Twelve mounting heads 13 are attached to the outer peripheral portion of the turntable 12 at equal intervals in the circumferential direction via two rods 42, 42 so as to be vertically movable. In this case, the intermittent rotation of the rotary table 12 has a twelve intermittent cycle for one rotation according to the number of the mounting heads 13, and the mounting heads 13 revolving by this intermittent rotation stop at the shared 12 places. Stop at each position.
[0015]
A plurality of (six in the embodiment) suction nozzles 43 arranged at equal intervals in the circumferential direction are respectively attached to each mounting head 13 so as to be able to protrude and retract, and as a whole, can revolve around a vertical axis. . Six suction nozzles 43 are used, and one suitable suction nozzle 43 can be selected according to the size of the electronic component A or the like. This selection is performed by revolving and moving the selected one suction nozzle 43 to the nozzle set position of the mounting head 13.
[0016]
The above-mentioned two rods 42, 42 extend upward through the rotary table 12, and are disposed below the support base 16 via a pair of upper and lower cam followers 44a, 44b attached to the upper end thereof. It is engaged with the cylindrical rib cam 46 of the fixed cylindrical body 45. When the mounting head 13 and the rod 42 rotate with the intermittent rotation of the rotary table 12, the cam followers 44a and 44b roll and contact the cylindrical rib cam 46, and the mounting head 13 moves up and down according to the contour curve of the cylindrical rib cam 46. Specifically, since the mounting point on the mounting side is at a lower position than the suction point on the suction side, the mounting head 13 revolving toward the suction side slowly moves upward and revolves toward the mounting side. The head 13 moves down slowly.
[0017]
On the other hand, various devices for accessing the mounting head 13 are installed at the twelve stop positions including the suction position and the mounting position accompanying the intermittent rotation of the rotary table 12 so as to be mounted on the support base 16. .
[0018]
At the suction position, the cam followers 44a, 44b attached to the rod 42 are engaged to disengage the cam followers 44a, 44b from the cylindrical rib cam 46, and the mounting head 13 is lowered for suction of the electronic component A. Similarly, a mounting head elevating device 52 for lowering the mounting head 13 for mounting the electronic component A is incorporated in the head elevating device 51 at the mounting position. Note that the two mounting head elevating devices 51 and 52 have the same basic structure except for the arm length.
[0019]
At the next stop position next to the mounting position in a clockwise direction, a nozzle selection device 53 that revolves the suction nozzle 43 and moves the selected one suction nozzle 43 to a nozzle set position located outside is provided by a nozzle selection device 53. In the stop position, the nozzle retracting device 54 for lowering the mounting head 13 to abut against the abutment table to immerse the unnecessary suction nozzles 43 and protruding the selected suction nozzle 43 while raising the mounting head 13 includes: Further, a nozzle length adjusting device 55 for adjusting the protruding length of the protruding suction nozzle 43 is incorporated in the next stop position.
[0020]
Similarly, a nozzle that revolves the suction nozzle 43 and corrects the position of the suction nozzle 43 facing the suction position in the left-right direction (the direction orthogonal to the direction of movement of the supply table) at the stop position immediately before the subsequent suction position. At the position next to the suction position, the position correcting device 56 revolves the suction nozzle 43 to return the suction nozzle 43 to the original nozzle set position. The component recognition device 58 for recognizing the posture of the sucked electronic component A (posture in the horizontal plane) moves the suction nozzle 43 to the next stop position based on the recognition result of the component recognition device 58. And a component angle correction device 59 for correcting the sucked electronic component A so as to be in a posture at the time of mounting. A plurality of camshafts are connected to the output shaft of the above-mentioned index unit 11, and each of these devices uses an intermittent cycle of the rotary table 12 by a cam provided on each camshaft corresponding to each device. It is operated in synchronization with.
[0021]
Here, a series of operations of the apparatus main body 2 will be briefly described by taking an example of an operation of an arbitrary mounting head 13 as an example. The mounting head 13 having the electronic component A mounted on the substrate B at the mounting position is publicly transferred toward the suction position by the intermittently rotating rotary table 12, and the selection of the suction nozzle 43 and the selection of the suction nozzle 43 based on the control command. The projection position is reached while the projection / immersion, the projection length adjustment, and the position correction are sequentially performed. On the other hand, in the suction system 3, while the mounting head 13 is moving from the stop position immediately before the suction position to the suction position, the supply table 23 is moved forward and backward based on the control command, and the corresponding electronic component parts are moved. The supply device 21 is brought to the suction position.
[0022]
Here, the mounting head 13 that has sucked the electronic component A is publicly transferred to the mounting position, and returns to the nozzle set position of the suction nozzle 43 based on the control command. In addition, the electronic component A reaches the mounting position while the angle correction of the electronic component A is sequentially performed based thereon. On the other hand, in the mounting system 4, while the mounting head 13 is moving from the stop position immediately before the mounting position to the mounting position, the XY table 31 is operated based on the control command, and the component mounting portion of the board B is moved. To the mounting position. Then, the mounting head 13 is lowered by the mounting head elevating device 52, and the electronic component A is mounted on the substrate B.
[0023]
Next, the tape cutting device 15 will be described with reference to FIGS. As shown in the side view of FIG. 3, the power of the index unit 11 is transmitted to a lower cam shaft 63 via an output pulley 61 and a timing belt 62 stretched over the output pulley 61, and the tape is cut from the lower cam shaft 63. Input to the device 15. Thus, the operation of the tape cutting device 15 and the operation of the rotary table 12 are synchronized via the index unit 11.
[0024]
As shown in FIG. 4, the tape cutting device 15 includes a positive cam mechanism 64 connected to the lower cam shaft 63 on the input side, a link mechanism 65 connected to the positive cam mechanism 64, and a distal end of the link mechanism 65. And a tape cutter 66 that cuts the carrier tape C. The tape cutter 66 is rotated by the input side rotational power via the positive cam mechanism 64 and the link mechanism 65, and the tape cutter 66 The tape cutter 66 is cut between the opposed fixed blades 67 like a pair of scissors.
[0025]
The positive cam mechanism 64 is composed of a main plate cam 71 and a sub plate cam 72 fixed to the lower cam shaft 63, and a main cam follower 73 and a sub cam follower 74 which are in rolling contact with these, respectively (see FIG. 5). The slave plate cam 72 has a contour curve having a conjugate relationship with the contour curve of the master plate cam 71 so that the slave plate cam 72 can follow the master plate cam 71 accurately. The main plate cam 71 and the sub plate cam 72 are incorporated in the lower cam shaft 63 while maintaining a phase corresponding to the arrangement angle of the main cam follower 73 and the sub cam follower 74.
[0026]
The main cam follower 73 and the slave cam follower 74 are configured as so-called roller followers, and are rotatably attached to the input link 81 of the link mechanism 65. The link mechanism 65 includes an input link 81, an output link 82 to which the tape cutter 66 is attached, a connection link 83 connecting the input link 81 and the output link 82, and a buffering means interposed between the input link 81 and the connection link 83. 84.
[0027]
The input link 81 has a pair of arms 81a to which both the master and slave cam followers 73 and 74 are attached, and is formed in a “Y” shape. The input link 81 is connected to a frame via a support shaft 85 provided at an intermediate portion. It is rotatably mounted. The connection end 81b of the input link 81 on the connection link 83 side is formed in a tubular shape, and slidably engages with the buffering means 84.
[0028]
The buffering means 84 includes a main body 91 including a head portion 91a and a shaft portion 91b, a coil spring 92 loosely inserted into the shaft portion 91b, a female screw 93 screwed into a male screw portion 91c at the tip of the shaft portion 91b, a female screw 93, And a spring presser 94 interposed between the coil springs 92. A connection link 83 is rotatably connected to a head portion 91a of the main body 91, and is engaged with a shaft portion 91b so that a connection end portion 81b of the input link 81 is inserted therethrough. On the other hand, the coil spring 92 is disposed so as to sandwich the connection end portion 81b of the input link 81 between the head end 91a and the rear end thereof. Is biased toward the head 91a.
[0029]
As a result, the input link 81 and the main body 91 of the buffer means 84 in a steady state are urged by the coil spring 92 and are fixedly engaged, and the buffer means 84 operates in conjunction with the input link 81. However, if a force is applied to the main body 91 of the buffering means 84 from the connection link 83 due to a hard object biting the tape cutter 66 or the like, the main body 91 is pulled by the connection link 83, but the input link 81 resists the coil spring 92. Then, the shaft 91b is slid. That is, the buffer means 84 functions as a relief for the power transmission system in the tape cutting device 15 employing the positive cam mechanism 64.
[0030]
The connecting link 83 has one end rotatably attached to the main body 91 of the buffer means 84 and the other end rotatably attached to the output link 82, and is provided with a turn-buckle-like screw 86 provided at an intermediate portion. , The length is adjustable. On the other hand, the output link 82 is formed in an “L” shape, and one end of the output link 82 is rotatably connected to the connection link 83 and the other end of the tape cutter 66 is fixed. It is rotatably attached to the frame side through the.
[0031]
Here, the operation of the tape cutting device 15 will be briefly described with reference to FIG. In the state shown in the figure, the input link 81 rotates clockwise and the output link 82 rotates counterclockwise, and the tape cutter 66 is in the open position. In this state, the carrier tape C from which the electronic component A has been picked up is introduced between the tape cutter 66 and the fixed blade 67. When the carrier tape C is introduced, at the subsequent timing, the input link 81 rotates counterclockwise, and accordingly the output link 82 rotates clockwise, turning the tape cutter 66 toward the closed position. (Cutting operation). When the cutting is completed, at the subsequent timing, the input link 81 rotates clockwise and the output link 82 rotates counterclockwise, and the tape cutter 66 rotates to the original open position.
[0032]
On the other hand, assuming that the electronic component A is bitten by the tape cutter 66 due to a suction error of the electronic component A or the like, in this case, the movement of the tape cutter 66 toward the closed position is caused by the electronic component A bitted by this. Will be blocked. That is, the movements of the output link 82 and the connection link 83 are stopped halfway, while the input link 81 is normally rotated by the positive cam mechanism 64. Then, even if the connecting end portion 81b of the input link 81 slides on the shaft portion 91b of the buffer means 84 against the coil spring 92, and the movements of the output link 82 and the connecting link 83 are stopped, the positively moving cam is stopped. The movement of the mechanism 64 and the input link 81 is allowed.
[0033]
As described above, according to the tape cutting device 15 of the present embodiment, by using the positive cam mechanism 64 on the input side, the urging force is applied to the master and slave cams 71 and 72 via the master and slave cam followers 73 and 74, respectively. Without acting, the restraint can be maintained, and the power transmission between the master and slave cams 71 and 72 and the life of the master and slave cams 71 and 72 and the master and slave cam followers 73 and 74 can be maintained. Further, by providing the buffer mechanism 84 in the link mechanism 65, even when the electronic component A is bitten by the tape cutter 66, the operation of the positive cam mechanism 64 is allowed, and it is possible to avoid applying a large force to the link mechanism 65. Thus, damage to the link mechanism 65 can be prevented. Therefore, the reliability of the device can be improved.
[0034]
Although the positive cam mechanism of this embodiment is configured using two plate cams and two cam followers, the positive cam such as an end face cam or a triangular cam is used to form one plate cam. And one cam follower. The structure of the buffer means is arbitrary as long as it has the above-described functions.
[0035]
【The invention's effect】
As described above, according to the electronic component mounting apparatus of the present invention, the biasing force is applied to the cam of the cam mechanism by configuring the cam mechanism with the positive cam mechanism that is rotated and driven by the power transmitted from the driving source of the rotary table. Without acting, the cam follower can be kept restrained against the cam, and the cushioning means can release the force of the cam when a hard object bites, so that damage to the link mechanism can be prevented, and Wear of the cam mechanism can be suppressed as much as possible, and the reliability of the entire apparatus can be improved.
[Brief description of the drawings]
FIG. 1 is a front view of an electronic component mounting device equipped with a tape cutting device according to one embodiment of the present invention.
FIG. 2 is a plan view of an electronic component mounting device on which the tape cutting device of the embodiment is mounted.
FIG. 3 is a structural diagram around a tape cutting device of the embodiment.
FIG. 4 is a front view of the tape cutting device according to the embodiment.
FIG. 5 is a plan view around a positive cam mechanism.
FIG. 6 is a front view of a conventional tape cutting device.
[Explanation of symbols]
Reference Signs List 1 electronic component mounting device 15 tape cutting device 64 positive movement cam mechanism 65 link mechanism 66 tape cutter 84 buffer means C carrier tape

Claims (1)

A component supply device having a tape reel wound with a carrier tape in which electronic components are loaded at a predetermined pitch, and a plurality of components mounted on an outer peripheral portion of a turntable to suck electronic components from the carrier tape and mount the components on a substrate Mounting head, an input-side cam mechanism, a link mechanism connected to the cam mechanism, and a tape cutter connected to the link mechanism, and by the input-side rotational power, via the cam mechanism and the link mechanism, An electronic component mounting device comprising: a tape cutting device that performs a cutting operation of the carrier tape after the electronic component is attracted to the tape cutter.
The cam mechanism is constituted by a positive cam mechanism to which power is transmitted from a driving source of the rotary table and is rotationally driven ,
An electronic component mounting device, wherein the link mechanism is provided with a buffer means that allows the operation of the cam mechanism when the cutting operation of the tape cutter is prevented.

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