JP6014689B2 - Electronic component mounting equipment - Google Patents

Description

  The present invention relates to an electronic component mounting apparatus.

  As an electronic component mounting apparatus, an apparatus using a tape feeder that sends out a tape on which a large number of electronic components are arranged so as to be collected is known. For example, in the electronic component mounting apparatus described in Patent Document 1, a head that can move on a horizontal plane (XY plane) collects an electronic component from a tape sent to a predetermined component supply position by a tape feeder. Subsequently, the head mounts the collected electronic component on a substrate placed at a predetermined component mounting position. After the electronic component is collected by the head, the empty part of the tape is cut by the fixed blade and the movable blade of the tape cutting unit. The tape cutting unit is fastened with bolts via rubber cushions to holding brackets provided at three positions on the side surface of the base of the electronic component mounting apparatus. Since the tape cutting unit is fastened to the side surface of the base via the rubber cushion in this way, even if the planar accuracy of the side surface of the base is poor, a large external force such as twisting acts on the tape cutting unit. There is nothing to do. Therefore, there is no deviation in the position of the cutting edge between the fixed blade and the movable blade of the tape cutting unit, and the effect that cutting failure or the like does not occur can be obtained.

JP 2003-218487 A

  However, in the electronic component mounting apparatus described above, since the tape cutting unit is fastened to the holding bracket with a bolt, an impact generated when the tape is cut is transmitted to the head via the holding bracket and the base. If such an impact is transmitted to the head, it affects the positional accuracy of the head, which is not preferable.

  The present invention has been made to solve such a problem, and it is a main object of the present invention to alleviate an impact generated when cutting a tape in an electronic component mounting apparatus.

  The electronic component mounting apparatus of the present invention employs the following means in order to achieve the above-described main object.

The electronic component mounting apparatus of the present invention is
A housing,
A tape feeder attached to the housing and for feeding out a tape on which a large number of electronic components can be collected; and
The electronic component is collected from the tape attached to the housing in a movable state on the horizontal plane and sent to a predetermined component supply position by the tape feeder, and the collected electronic component is arranged at a predetermined component mounting position. A head to be mounted on a printed board,
A tape cutting unit that is attached to the housing and cuts the component empty portion of the tape after the electronic component is collected by the head by two blades, at least one of which is a movable blade;
An electronic component mounting apparatus comprising:
The tape cutting unit has a base to which the two blades are attached;
The base is placed on a base receiving portion that forms a part of the casing with a first clearance that is movable between the base and the casing in a direction in which the movable blade moves. .

  In the electronic component mounting apparatus of the present invention, the tape cutting unit has a base. Two blades, at least one of which is a movable blade, are attached to the base. Further, the base is placed on a base receiving portion that forms a part of the housing with a first clearance that can move in the direction in which the movable blade moves between the base and the housing. At this time, even if an impact is generated at the time of cutting the tape, the base moves in the first clearance, so the impact is absorbed by the friction between the base and the base receiving portion. Therefore, it is possible to mitigate the impact generated when cutting the tape.

  One of the two blades may be a movable blade and the other may be a fixed blade, or both may be movable blades.

  The electronic component mounting apparatus of the present invention may include a restricting portion that restricts a movable range of the base. The restriction portion may include a protrusion provided on the base and a protrusion insertion portion provided on the housing, and the protrusion may be inserted into the protrusion insertion portion with the first clearance. A protrusion provided on the housing and a protrusion insertion portion provided on the base may be provided, and the protrusion may be inserted into the protrusion insertion portion with the first clearance.

  In the electronic component mounting apparatus according to the aspect of the invention, the base may have a second clearance that can move in a direction orthogonal to a direction in which the movable blade moves between the base and the housing. If it carries out like this, when an impact generate | occur | produces at the time of a tape cutting | disconnection, it will become easy to move a base to the moving direction of a movable blade. Further, since the base can move in a plurality of directions, it becomes easier to absorb the impact.

  In the electronic component mounting apparatus of the present invention, the base may include an absorber that reduces an impact when the movable blade moves from an initial position and reaches a moving end. By doing so, the shock at the time of cutting the tape is absorbed by the absorber, so that the shock generated by the tape cutting unit can be more effectively mitigated. The base may further include an absorber that absorbs an impact when returning to the initial position.

The perspective view of the electronic component mounting apparatus 10. FIG. FIG. 3 is a schematic cross-sectional view of a front portion of the electronic component mounting apparatus 10. FIGS. 2A and 2B are cross-sectional views taken along the line A-A in FIG. 1, in which FIG. 1A illustrates a state where the movable blade 66 is in an initial position, and FIG. The back view of the tape cutting unit 60 when the movable blade 66 exists in an initial position. The back view of the tape cutting unit 60 when the movable blade 66 exists in a cutting position. The right view of the tape cutting unit 60. FIG. The elements on larger scale of FIG. BB sectional drawing of FIG. The left view of the tape cutting unit 60. FIG. The elements on larger scale of FIG. CC sectional drawing of FIG. Explanatory drawing of the right side bracket 182. FIG.

  Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the electronic component mounting apparatus 10, and FIG. 2 is a schematic explanatory view of a front portion of the electronic component mounting apparatus 10. In the present embodiment, the left-right direction (X-axis), the front-rear direction (Y-axis), and the up-down direction (Z-axis) are as shown in FIG.

  As shown in FIG. 1, the electronic component mounting apparatus 10 includes a substrate transport device 18 that transports the circuit board 16, a head 24 that can move on the XY plane, a reel unit 50 that supplies electronic components by tape, and an electronic component. And a tape cutting unit 60 for cutting the tape after the tape is removed.

  The substrate transfer device 18 is attached to the housing 12 and is provided on the opposing surfaces of the support plates 20 and 20 and the support plates 20 and 20 that are provided in the front-rear direction of FIG. Conveyor belts 22 and 22 (only one of them is shown in FIG. 2). The conveyor belts 22 and 22 are stretched over the drive wheels and the driven wheels provided on the left and right sides of the support plates 20 and 20 so as to be endless. The circuit board 16 is placed on the upper surfaces of the pair of conveyor belts 22 and 22 and is conveyed from left to right. The circuit board 16 is supported by a large number of support pins 23 erected on the back side.

  The head 24 is attached to the front surface of the X-axis slider 26. The X-axis slider 26 is attached to the front surface of the Y-axis slider 30 that can slide in the front-rear direction so as to be slidable in the left-right direction. The Y-axis slider 30 is slidably attached to a pair of left and right guide rails 32, 32 extending in the front-rear direction. The guide rails 32 and 32 are fixed to the housing 12. A pair of upper and lower guide rails 28, 28 extending in the left-right direction are provided on the front surface of the Y-axis slider 30, and the X-axis slider 26 is attached to the guide rails 28, 28 so as to be slidable in the left-right direction. The head 24 moves in the left-right direction as the X-axis slider 26 moves in the left-right direction, and moves in the front-rear direction as the Y-axis slider 30 moves in the front-rear direction. Each slider 26, 30 is driven by a drive motor (not shown). The head 24 incorporates a Z-axis motor 34, and adjusts the height of the suction nozzle 40 integrated with a holder 42 attached to a ball screw 36 extending along the Z-axis by the Z-axis motor 34. The suction nozzle 40 uses pressure to suck a component at the tip of the nozzle or to release a component sucked at the tip of the nozzle.

  The reel unit 50 includes a plurality of reels 52 and is detachably attached to the front side of the housing 12. As shown in FIG. 2, the tape T is wound around each reel 52, and a plurality of electronic components are held on the surface of the tape T along the longitudinal direction. These electronic components are protected by a film covering the surface of the tape T. Such a tape T is unwound from the reel toward the rear by a tape feeder 54 attached to the housing 12, and the film is peeled off at the component supply position P to expose the electronic component.

  The tape cutting unit 60 is disposed below the tape feeder 54. FIGS. 3A and 3B are cross-sectional views taken along line AA of FIG. 1. FIG. 3A shows a state where the movable blade 66 is in the initial position, and FIG. 3B shows a state where the movable blade 66 is in the cutting position. 4 and 5 are rear views of the tape cutting unit 60. FIG. 4 shows the movable blade 66 in the initial position, and FIG. 5 shows the movable blade 66 in the cutting position. As shown in FIG. 3, the tape cutting unit 60 has a fixed blade 64 and a movable blade 66 for cutting the tape T attached to the back surface of a plate-like base 62 having a rectangular opening 68. is there. The base 62 is placed on a base receiving portion 80 a that forms a part of the housing 12. The fixed blade 64 is fixed behind the opening 68 through which the tape T passes. The cutting edge 64a of the fixed blade 64 is slightly inclined from the left-right direction as shown in FIG. 4, but this is for reducing resistance when the tape T is cut. The movable blade 66 is fixed to the tip of the rod 72 of the air cylinder 70 installed on the back surface of the base 62, and can move between the initial position and the stroke end position by controlling the air pressure supplied to the air cylinder 70. It has become. The initial position is the position when the rod 72 of the air cylinder 70 is most retracted (the movable blade 66 is separated from the fixed blade 64), and the stroke end position is the position of the rod 72 of the air cylinder 70. It is the position when it protrudes most (the movable blade 66 overlaps the fixed blade 64). As shown in FIG. 4, the movable blade 66 has a zigzag-shaped cutting edge 66 a, which is for reducing resistance when the tape T is cut. As shown in FIGS. 4 and 5, an L-shaped member 66 b is integrated with the movable blade 66 on the front left side of the movable blade 66. The L-shaped member 66b hits the pin 74a of the first absorber 74 and pushes the pin 74a immediately before reaching the stroke end position after the movable blade 66 in the initial position moves toward the fixed blade 64. Thereby, the impact when the movable blade 66 reaches the stroke end position is alleviated. A pressing portion 66 c is integrated with the movable blade 66 on the right front side of the movable blade 66. The pressing portion 66c hits the pin 76a of the second absorber 76 and pushes the pin 76a immediately before reaching the initial position after the movable blade 66 at the stroke end position moves away from the fixed blade 64. Thereby, the impact when the movable blade 66 returns to the initial position is alleviated. The movable blade 66 is provided with a plate-like cover 69 obliquely downward. The cover 69 serves to prevent the tape T from being caught on the air cylinder 70 side.

  Here, the tape cutting unit 60 is supported by the housing 12 so as to be in a floating state. Specifically, as shown in FIG. 3, two support rails 80, 80 having a C-shaped cross section extending in the left-right direction (direction perpendicular to the paper surface) are fixed to the housing 12 so as to face each other. The base 62 of the tape cutting unit 60 is placed on the base receiving portion 80a of the support rail 80 with play in the front-rear direction. Since the support rail 80 is fixed to the housing 12 and the base receiving portion 80a is a part of the support rail 80, the base receiving portion 80a forms a part of the housing 12.

  A right side view of the tape cutting unit 60 is shown in FIG. 6, a partially enlarged view of FIG. 6 is shown in FIG. 7, and a BB sectional view of FIG. 7 is shown in FIG. As shown in FIG. 6, a plate-like right bracket 82 is fixed to the right end of the support rail 80 with a bolt 84. The right bracket 82 is provided with a hole 86 through which an intermediate portion 65b of the right pin 65 integrated with the base 62 passes. The right pin 65 has a foot portion 65 a screwed into the base 62, an intermediate portion 65 b disposed with a gap from the hole 86, and a head portion 65 c having a larger diameter than the hole 86. A first clearance C <b> 1 is formed in the front-rear direction between the intermediate portion 65 b of the right pin 65 and the edge of the hole 86. Further, a second clearance C <b> 2 is formed in the left-right direction between the head 65 c of the right pin 65 and the right bracket 82. The first clearance C1 is about 1 mm as a whole, and the second clearance C2 is also about 1 mm as a whole.

  A left side view of the tape cutting unit 60 is shown in FIG. 9, a partially enlarged view of FIG. 9 is shown in FIG. 10, and a CC sectional view of FIG. 10 is shown in FIG. As shown in FIG. 9, an L-shaped left bracket 83 is fixed to the left end of the support rail 80 with two bolts 85. The left bracket 83 is provided with a hole 87 through which the head 67b of the left pin 67 integrated with the base 62 passes. The left pin 67 has a foot portion 67a screwed into the base and a head portion 67b disposed with a hole 87 and a gap. A first clearance C <b> 3 is formed in the front-rear direction between the head 67 b of the left pin 67 and the edge of the hole 87. A second clearance C4 is formed in the left-right direction between the left bracket 83 and the left end surface of the base 62. The first clearance C3 is about 1 mm as a whole, and the second clearance C4 is also about 1 mm as a whole. Note that the right and left brackets 82 and 83 are both fixed to the housing 12 via the support rails 80, and thus can be said to be members forming part of the housing 12.

  Since the tape cutting unit 60 is thus placed on the base receiving portion 80a so as to be in a floating state, the tape cutting unit 60 can move in the front-rear direction within the range of the first clearances C1 and C3, and the second clearance. It can move in the left-right direction within the range of C2 and C4.

  Next, the case where an electronic component is mounted using the electronic component mounting apparatus 10 is demonstrated. A controller (not shown) of the electronic component mounting apparatus 10 drives the reel 52 of the reel unit 50 to rotate by the tape feeder 54, unwinds the tape T wound around the reel 52 toward the rear, and performs electronic control at the component supply position P. The parts are exposed on the surface of the tape T. Thereafter, the controller controls the X-axis slider 26 and the Y-axis slider 30 so that the suction nozzle 40 comes directly above the exposed electronic component. Subsequently, the controller controls the Z-axis motor 34 to lower the suction nozzle 40 with the ball screw 36 and applies a negative pressure to the tip of the suction nozzle 40. Then, the electronic component is sucked from the tape T to the tip of the suction nozzle 40. Thereafter, the controller raises the suction nozzle 40, controls each slider 26, 30 so that the electronic component is directly above the predetermined position of the circuit board 16, lowers the suction nozzle 40 at that position, and sucks the suction nozzle 40. Supply positive pressure to Then, the electronic component is separated from the suction nozzle 40 and mounted at a predetermined position on the circuit board 16.

  Each time an electronic component is mounted, a component empty portion is generated on the tape T. The empty part of the tape T passes through a tape passage 56 (see FIG. 2) provided in the housing 12 and is fed into the opening 68 of the tape cutting unit 60. The empty part of the tape T sent to the opening 68 is cut by the fixed blade 64 and the movable blade 66.

  When the tape T is cut by both the blades 64 and 66, the movable blade 66 in the initial position advances toward the fixed blade 64, and when the tape T is cut, an impact is generated and the movable blade 66 is stroked. An impact is also generated when the end position (moving end) is reached. Some of these impacts are absorbed by the first absorber 74, but the remaining impacts may be transmitted to the housing 12. In the present embodiment, the base 62 of the tape cutting unit 60 is placed on the base receiving portion 80a with a clearance in the front / rear and left / right directions. Therefore, compared with the case where the base 62 is rigidly fixed to the base receiving portion 80a, the impact transmitted to the housing 12 is mitigated, and the influence on the Y-axis position accuracy of the head 24 is reduced.

  Actually, when the shake amount of the head 24 in the Y-axis direction was measured, the shake amount was reduced to about half in this embodiment as compared with the case where the base 62 is rigidly fixed to the base receiving portion 80a. Further, when the horizontal shaking of the base 62 was measured, the shaking increased 3 to 4 times in this embodiment compared to the case where the base 62 is rigidly fixed to the base receiving portion 80a. Longitudinal shaking has not been measured but is expected to be comparable. Furthermore, when the position shift of the base 62 before and after cutting was measured in this embodiment, it was shifted by 30 to 50 μm. The forward / backward displacement has not been measured but is expected to be comparable.

  The mechanism for obtaining such an effect is considered as follows. While the tape T is being cut, the moving speed of the movable blade 66 becomes slightly slower due to the resistance of the tape T. However, after the cutting of the tape T is finished, the resistance of the tape T is lost, so the moving speed of the movable blade 66 is reduced. Will be faster. After that, when the stroke end position is reached, the movable blade 66 that has been moving at a high speed stops, thereby causing an impact. The impact energy at this time is alleviated by the first absorber 74, but the impact energy that cannot be alleviated is consumed by friction when the base 62 moves through the base receiving portion 80a. As a result, it is considered that the impact transmitted to the housing 12 via the support rail 80 is reduced.

  After the tape T is cut, the movable blade 66 returns to the initial position. At that time, the movable blade 66 does not receive the resistance of the tape T, and thus returns to the initial position relatively gently. Even if an impact occurs at that time, the second absorber 76 absorbs the impact or absorbs the impact by friction between the base 62 and the base receiving portion 80a, so the impact transmitted to the housing 12 is small. It will be a thing.

  According to the electronic component mounting apparatus 10 of the present embodiment described above, since the base 62 of the tape cutting unit 60 moves in the first clearances C1 and 3 even if an impact occurs during tape cutting, the base 62 And the base receiving portion 80a absorb the impact. Therefore, the impact generated at the time of cutting the tape can be mitigated, and as a result, the influence of the impact on the positional accuracy of the head 24 (particularly the positional accuracy of the Y axis) can be suppressed to a low level.

  Further, the movable range of the base 62 can be limited by the size of the first clearances C1 and C3. The hole 86 of the right bracket 82 and the intermediate portion 65b of the pin 65 provided on the base 62, and the hole 87 of the left bracket 83 and the head 67b of the pin 67 provided on the base 62 correspond to the restricting portion of the present invention. .

  Furthermore, since the second clearances C2 and C4 exist, the left and right brackets 82 and 83 do not prevent the tape cutting unit 60 from reciprocating back and forth. Further, since the base 62 can move in a plurality of directions, it becomes easier to absorb the impact.

  Furthermore, since the impact when the tape is cut is also absorbed by the first absorber 74 and the impact when the movable blade 66 returns to the original initial position after the tape is cut is also absorbed by the second absorber 76, the tape cutting unit 60 It is possible to more effectively mitigate the impact generated by.

  It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

  For example, in the above-described embodiment, the pins 65 and 67 are provided on the left and right sides of the base 62 of the tape cutting unit 60, respectively, and the pins 65 and 67 are clearanceed on the right and left brackets 82 and 83 forming a part of the housing 12. However, conversely, the right and left brackets 82 and 83 may be provided with pins, and the base 62 may be provided with holes for inserting the pins with clearance. Further, instead of providing holes or pins on the left and right brackets, the base receiving portion 80a may be provided, and pins or holes may be provided at positions facing the holes or pins in the base 62. Moreover, you may change a hole into a groove | channel (notch). For example, instead of the right bracket 82 having the hole 86, a right bracket 182 having a semicircular cutout 186 may be used as shown in FIG. An intermediate portion 65b of the pin 65 is inserted into the notch 186 with a clearance C1. The holes 86 and 87 and the notches 186 are not limited to a circular shape and a semicircular shape, and may be a square shape or the like. Even if it does in these cases, the effect similar to embodiment mentioned above is acquired.

  In the embodiment described above, the tape cutting unit 60 employs a configuration in which the tape is cut by the fixed blade 64 and the movable blade 66, but a configuration in which the tape is cut by the movable blade and the movable blade may be employed. In this case, at the initial position, both movable blades are arranged facing each other at a distance, and both movable blades overlap at the time of cutting. Also in this case, the same effect as the above-described embodiment can be obtained.

  In the embodiment described above, the movable blade 66 is fixed to the rod 72 of the air cylinder 70 and the movable blade 66 is moved by controlling the air pressure of the air cylinder 70. However, instead of the air cylinder 70, a hydraulic cylinder or motor is used. It may be used. Also in this case, the same effect as the above-described embodiment can be obtained.

  In the above-described embodiment, the bracket and the pin are configured differently on the left and right sides of the tape cutting unit 60 (FIG. 6 to FIG. 8 on the right side and FIGS. 9 to 11 on the left side). Also in this case, the same effect as the above-described embodiment can be obtained.

  In the embodiment described above, the pins 65 and 67 may not be provided on the left and right sides of the base 62, and the holes 86 and 87 may not be provided in the left and right brackets 82 and 83. Even in this case, as shown in FIG. 3, the base 62 is placed on the base receiving portion 80a of the pair of support rails 80 and 80 so as to be able to play in the front-rear direction. The impact can be absorbed by this friction, and the impact generated when the tape is cut can be reduced. Further, since the length of the support rail 80 is longer than the length of the base 62 in the left-right direction, a clearance in the left-right direction also occurs between the brackets 82, 83 on the left and right sides and the base 62. Therefore, the bracket does not obstruct the movement of the base 62 in the front-rear direction, and the base 62 can move in a plurality of directions, so that it becomes easier to absorb the impact. In this case, the vertical surface of the support rail 80 corresponds to the restricting portion of the present invention.

  In the embodiment described above, the horizontal surface of the support rail 80 having a C-shaped cross section is the base receiving portion 80a. However, the horizontal surface of the support rail having the L-shaped cross section may be the base receiving portion.

  The present invention can be used in the field of mounting electronic components.

DESCRIPTION OF SYMBOLS 10 Electronic component mounting apparatus, 12 Housing | casing, 16 Circuit board, 18 Substrate conveyance apparatus, 20 Support plate, 22 Conveyor belt, 23 Support pin, 24 Head, 26 X axis slider, 28 Guide rail, 30 Y axis slider, 32 Guide Rail, 34 Z-axis motor, 36 Ball screw, 40 Suction nozzle, 42 Holder, 50 Reel unit, 52 Reel, 54 Tape feeder, 56 Tape passage, 60 Tape cutting unit, 62 Base, 64 Fixed blade, 64a Blade tip, 65 Right pin , 65a Foot, 65b Intermediate part, 65c Head, 66 Movable blade, 66a Blade tip, 66b L-shaped member, 66c Pressing part, 67 Left pin, 67a Foot, 67b Head, 68 Opening, 69 Cover, 70 Air cylinder 72 rod 74 first absorber 74a pin 76 Second absorber, 76a pin, 80 support rail, 80a base receiving part, 82 right bracket, 83 left bracket, 84 bolt, 85 bolt, 86 hole, 87 hole, 182 right bracket, 186 notch.

Claims (4)

A housing,
A tape feeder attached to the housing and for feeding out a tape on which a large number of electronic components can be collected; and
The electronic component is collected from the tape attached to the housing in a movable state on the horizontal plane and sent to a predetermined component supply position by the tape feeder, and the collected electronic component is arranged at a predetermined component mounting position. A head to be mounted on a printed board,
A tape cutting unit that is attached to the housing and cuts the component empty portion of the tape after the electronic component is collected by the head by two blades, at least one of which is a movable blade;
An electronic component mounting apparatus comprising:
The tape cutting unit has a base to which the two blades are attached;
The base is placed on a base receiving portion that forms a part of the casing with a first clearance that is movable in the direction of movement of the movable blade between the base and the casing.
Electronic component mounting equipment. The electronic component mounting apparatus according to claim 1, further comprising a restricting portion that restricts a movable range of the base. The base has a second clearance that is movable in a direction perpendicular to a direction in which the movable blade moves between the base and the housing.
The electronic component mounting apparatus according to claim 1 or 2. The base includes an absorber that relieves an impact when the movable blade moves from an initial position and reaches a moving end.
The electronic component mounting apparatus of any one of Claims 1-3.

Images