JP4595930B2 - Tape feeder - Google Patents

Description

  The present invention relates to a tape feeder that pitches an electronic component held on a tape and supplies the electronic component to a pickup position of an electronic component mounting apparatus.

  In an electronic component mounting apparatus, a method using a tape feeder is known as a method for supplying an electronic component to a pickup position of a nozzle of a mounting head. In this method, a tape for holding an electronic component is pulled out from a supply reel, and pitch-fed in synchronization with the mounting timing of the electronic component to be supplied to a nozzle. A top tape is affixed to the upper surface of the tape to protect the electronic components and prevent them from falling off, and the top tape is peeled off from the upper surface of the base tape before being sent to the pickup position.

The peeled top tape is folded back in the direction opposite to the tape feeding direction, is sandwiched and fed between a pair of feeding gears for feeding, and is guided into a collection container for collecting the top tape (see, for example, Patent Document 1). When the tape storage container is filled with the top tape, a tape discharging operation for opening the collection container and taking out the internal top tape is performed. In the tape feeding for recovering the peeled top tape, there is often a problem that the position is shifted in the width direction and the transport gear is not properly engaged. In order to prevent this misalignment, in the example shown in Patent Document 1, a misalignment in the width direction of the top tape is regulated by providing a regulating plate having a U-shaped cross section on the front side of the transport gear in the tape feeding path. ing.
JP 2004-342699 A

  However, since the top tape is extremely thin and easily folds, even when the restriction plate is provided as described above, a positional deviation in the width direction occurs when the top tape is fed. That is, immediately before the top tape is bitten by the transport gear, if the top tape is slightly deviated from the correct biting direction, the subsequent top tape is bitten in this shifted direction. Eventually, the result will be out of the biting width range of the transport gear. As described above, in the conventional tape feeder, a measure for effectively preventing the positional deviation in the width direction of the top tape peeled from the base tape has been desired.

  Then, an object of this invention is to provide the tape feeder which can prevent effectively the position shift of the width direction of the top tape peeled from the base tape.

The tape feeder of the present invention is a tape feeder that sequentially feeds electronic components to a pickup position by a mounting head by pitch feeding a carrier tape holding electronic components, and covers the electronic components on the upper surface of the carrier tape. The top tape attached and peeled off from the carrier tape just before the pick-up position is stored in a tape container or discharged to the outside by being sandwiched between a pair of rollers having mesh teeth on the outer peripheral surface. A first roller that is pivotally supported by a main body portion that constitutes a main body of the tape feeder and is rotationally driven in a rotation direction corresponding to the feed direction of the top tape. And supported by the moving member with respect to the first roller by moving the moving member. The second roller meshing with the first roller in a state of being separated from and closer to the first roller, and the first roller and the second roller have different side surfaces than the outer peripheral surfaces. A first guide member and a second guide member, which are provided to extend outward in a radial direction and restrict positional displacement in the width direction of the top tape in the top tape feeding operation; Both sides of the meshing portion where the meshing teeth of the second roller and the first roller mesh with each other in the state of being close to the first roller are covered by the first guide member and the second guide member, respectively. is, in a state in which the second roller was spaced first row La or al, on either side of the space formed in the position was meshing portion at said moved close state, Clearance not covered by serial first guide member or the second guide member is formed.

  According to the present invention, the first roller and the second roller constituting the top tape feeding mechanism are provided with the first guide member and the second guide member that regulate the positional deviation in the width direction in the top tape feeding operation, A gap portion that is not covered by the first guide member or the second guide member is formed on any side surface of the space generated at the position where the second roller is separated from the first roller. By configuring the guide member in such a way, the positional deviation in the width direction of the top tape peeled off from the base tape can be ensured without impairing the workability when the top tape is inserted and mounted between a pair of rollers. Can be prevented.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of an electronic component mounting apparatus according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of the electronic component mounting apparatus according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is an explanatory view of the structure of the tape feeder, FIG. 4 is an explanatory view of the mechanism of the tape feeder according to the embodiment of the present invention, and FIGS. 5 and 6 are explanatory views of the mechanism of the top tape feed mechanism of the tape feeder according to the embodiment of the present invention. FIG. 7 is an operation explanatory view of the top tape feeding mechanism of the tape feeder according to the embodiment of the present invention.

  First, the structure of the electronic component mounting apparatus will be described with reference to FIGS. FIG. 2 partially shows an AA cross section in FIG. In FIG. 1, a transport path 2 is disposed in the center of the base 1 in the X direction (substrate transport direction). The conveyance path 2 conveys the substrate 3 carried in from the upstream side and positions it on the mounting stage. On both sides of the conveyance path 2, component supply units 4 are arranged, and each component supply unit 4 has a plurality of tape feeders 5 arranged in parallel. The tape feeder 5 sequentially feeds the electronic components to the pickup position by the suction nozzle of the mounting head described below by pitch-feeding the carrier tape holding the electronic components.

  Y-axis tables 6A and 6B are disposed on both ends of the upper surface of the base 1, and two X-axis tables 7A and 7B are installed on the Y-axis tables 6A and 6B. By driving the Y-axis table 6A, the X-axis table 7A moves horizontally in the Y direction, and by driving the Y-axis table 6B, the X-axis table 7B moves horizontally in the Y direction. Mounted on the X-axis tables 7A and 7B are a mounting head 8 and a substrate recognition camera 9 that moves integrally with the mounting head 8, respectively.

  By driving the Y-axis table 6A, the X-axis table 7A, the Y-axis table 6B, and the X-axis table 7B in combination, the mounting head 8 moves horizontally, and the electronic components are picked up from the respective component supply units 4 by suction nozzles 8a (see FIG. 2) and mounted on the substrate 3 positioned in the transport path 2. The Y-axis table 6A, the X-axis table 7A, the Y-axis table 6B, and the X-axis table 7B serve as a head moving mechanism that moves the mounting head 8.

The substrate recognition camera 9 that has moved onto the substrate 3 captures and recognizes the substrate 3. In addition, a component recognition camera 10 and a nozzle holding unit 11 are disposed on the route from the component supply unit 4 to the conveyance path 2. When the mounting head 8 that has taken out the electronic component from the component supply unit 4 moves to the substrate 3 positioned on the mounting stage, the electronic component held by the suction nozzle 8 a is moved in the X direction above the component recognition camera 10. Thus, the component recognition camera 10 images the electronic component held by the suction nozzle 8a.

  The imaging result is recognized by a recognition processing unit (not shown), whereby the position of the electronic component held in the suction nozzle 8a is recognized and the type of the electronic component is identified. The nozzle holding unit 11 stores a plurality of types of suction nozzles 8a in a predetermined posture, and the mounting head 8 accesses the nozzle holding unit 11 to perform a nozzle replacement operation. The nozzle is replaced according to the above.

  The structure of the component supply unit 4 will be described. As shown in FIG. 2, the component supply unit 4 is provided with a feeder base 4 a for mounting a plurality of tape feeders 5. The tape feeder 5 is arranged in the component supply unit 4 by a feeder mounting carriage 12. The carriage 12 is provided with a reel holding portion 13 for holding a tape reel 14 in which a carrier tape 15 is stored in a wound state. The reel holding unit 13 includes a holding roller for rotatably holding the tape reel 14, and the carrier tape 15 can be pulled out by rotating the tape reel 14 arranged in the component supply unit 4. It has become.

  Next, the configuration of the tape feeder 5 will be described with reference to FIG. As shown in FIG. 3, the frame member 5a attached to the feeder base 4a is provided with a tape traveling path 5b on which the carrier tape 15 travels. An electronic component P is held in a component pocket 15c, which is a recess for storing components formed on the base tape 15b serving as a base of the carrier tape 15 at a constant pitch. A top tape 15a is adhered to the upper surface of the base tape 15b so as to cover the electronic component P held in the component pocket 15c.

  The carrier tape 15 pulled out from the tape reel 14 is introduced from the rear end of the frame member 5a, and is sent to the downstream side (right side in FIG. 3) along the upper surface of the tape running path 5b. A sprocket 21 driven by the rotation drive mechanism 20 is disposed at the upper part of the downstream end of the frame member 5a. The sprocket 21 is provided with a feed pin 21 a (see FIG. 4) that fits into a tape feed hole 15 d (see FIG. 4) provided in the carrier tape 15 at a constant pitch. The sprocket 21 is rotated by the rotation drive mechanism 20. By driving, the carrier tape 15 is fed in the downstream direction. As shown in FIG. 4, the rotational drive mechanism 20 is configured to rotationally drive a bevel gear 20b meshed with a tooth surface 21b provided on the side surface of the sprocket 21 by a motor 20a, and to control the rotational operation of the motor 20a. Thus, the sprocket 21 performs an intermittent rotation operation corresponding to the pitch feeding operation of the carrier tape 15.

  On the upper surface of the downstream portion of the frame member 5a, an upper guide portion 18 for covering and guiding the upper portion of the carrier tape 15 in the vicinity of the component suction position is disposed. The upper guide portion 18 is provided with a suction opening 18a, and the downstream end of the suction opening 18a is a tape peeling portion 18b for peeling the top tape 15a. That is, in the process in which the carrier tape 15 travels below the upper guide portion 18, the top tape 15a is peeled from the carrier tape 15 by the tape peeling portion 18b before the pickup position by the suction nozzle 8a, and is folded back upstream.

  Then, the electronic component P is picked up by the suction nozzle 8a through the suction opening 18a from the component pocket 15c exposed by peeling off the top tape 15a. The folded top tape 15a is fed into the tape storage container 5c by the top tape feeding mechanism 22. When the tape feeder 5 does not contain the tape container 5c, the folded top tape 15a is collected after being discharged to the outside.

  The structure of the top tape feeding mechanism 22 will be described with reference to FIG. As shown in FIG. 5 (a), the top tape feeding mechanism 22 has a top between a pair of rollers (first roller 34, second roller 33) having flat teeth on the outer peripheral surface. The tape 15a is sandwiched and sent. The first roller 34 is pivotally supported by a frame portion 5a that is a main body constituting the main body of the tape feeder 5, and is rotated by a motor 30 via a transmission gear member 32 in accordance with the direction of rotation of the top tape 15a (here). Then, it is rotated in the counterclockwise direction). The second roller 33 that meshes with the first roller 34 is pivotally supported by a lever member 42 that is rotatable around a pivotal support point 43 provided at one end, and by rotating the lever member 42, The first roller 34 is in contact with or separated from the first roller 34. The lever member 42 is applied with an urging force in the clockwise direction with the shaft fulcrum 43 as a fulcrum, that is, an urging force in a direction in which the second roller 33 approaches the first roller 34 by an urging means (not shown). ing.

  The second roller 33 meshes with the first roller 34 in a state of approaching the first roller 34, and the first roller 34 rotates with the top tape 15a being meshed with the meshing portion. As a result, the top tape 15a is fed. When the top tape 15a is engaged with the meshing portion of the second roller 33 and the first roller 34, the lever member 42 is rotated counterclockwise against the urging force, and the second roller 33 is separated from the first roller 34. A stopper 44 for restricting the upper limit position of the lever member 42 is provided above the lever member 42, and the rotation position of the lever member 42 during the operation of engaging the top tape 15a is defined.

  In the present embodiment, in the configuration in which the second roller 33 is brought into contact with and separated from the first roller 34, the second roller 33 is pivotally supported by the lever member 42 as a moving member that rotates around the pivot point 43. However, the moving form of the moving member is not limited to rotation, and may be a moving member that moves linearly. In other words, the second roller 33 may be pivotally supported by a moving member guided by a linear guide, and the second roller 33 may be brought into contact with and separated from the first roller 34 by reciprocating the moving member.

  The spur tooth arrangement in the first roller 34 and the second roller 33 is such that the spur teeth 34a and 33a are removed one by one from a normal spur gear. When the transmission gear member 32 rotates while the top tape 15a is sandwiched between the flat teeth 34a and 33a, the top tape 15a is reliably fed into the tape storage container 5c without slipping. The motor 30, the transmission gear member 32, the first roller 34, and the second roller 33 sandwich the top tape 15a between a pair of rollers provided with meshing teeth on the outer peripheral surface and feed the tape to the pickup position. The top tape feeding mechanism that feeds in the opposite direction is configured.

  A tension mechanism 35 including a movable tension roller 36 is disposed on the front side of the first roller 34 and the second roller 33. As shown in FIG. 6, the tension roller 36 is held by a lever member 38 a having a fulcrum coaxial with the guide roller 37, and the peeled top tape 15 a is placed on the upper side of the guide roller 37 and the lower side of the tension roller 36. It goes around and is guided backwards. A spring 39 is coupled to the arm 38b integrated with the lever member 38a, and the lever member 38a and the arm 38b are always urged downward by the spring 39. Thus, tension is applied to the top tape 15a by the tension roller 36.

That is, when the top tape 15a is slackened at the position of the tension mechanism 35, the tension roller 36 moves downward. At the same time, the arm member 38b is rotated by the urging force of the spring 39, and the dog 38c provided at the tip is displaced downward. By detecting this displacement by the photoswitch 40, the slack of the top tape 15a is detected. If the slack is detected, the motor 30 is immediately driven to rotate, whereby the slack top tape 15a is fed into the tape container 5c, and a predetermined tape tension is maintained.

  Next, the guide member for regulating the positional deviation in the width direction of the top tape 15a in the top tape feeding mechanism 22 will be described. In the tape feeding for recovering the peeled top tape 15a, there is often a problem that the top tape 15a is displaced in the width direction and cannot be properly engaged with the roller. In order to prevent this displacement in the width direction, in the present embodiment, guide members are provided on the first roller 34 and the second roller 33 as described below.

  FIG.5 (b) has shown the ABCD cross section in Fig.5 (a). As shown in FIG. 5 (b), a flange member 41 is mounted on one side surface 34b of the first roller 34 (see also the flange member 41 indicated by a chain line in FIG. 5 (a)). The flange member 41 has a size having an extended portion 41a that extends from the first roller 34 by a predetermined dimension a on the outer side in the radial direction from the outer peripheral surface. Further, the lever member 42 has a predetermined value on the outer side surface of the second roller 33 on the other side surface 33c opposite to the side surface 34b on the one side of the first roller 34. An extension portion 42a extending by the dimension b is provided. Here, the dimension a is set to be larger than the dimension b by a predetermined dimension described later.

  Both the extending portions 41a and 42a regulate the positional deviation in the width direction of the top tape 15a in the top tape feeding operation in which the top tape 15a is sandwiched and fed to the meshing portion E of the first roller 34 and the second roller 33. It has a function to do. Accordingly, the extending portions 41a and 42a are provided on the different sides of the first roller 34 and the second roller 33 so as to extend more radially outward than the outer peripheral surfaces, and in the top tape feeding operation. It is a first guide member and a second guide member that regulate positional deviation in the width direction of the top tape.

  Then, as shown in FIG. 5B, in the state in which the second roller 33 is brought close to the first roller 34, the meshing teeth of the second roller 33 and the first roller 34 mesh with each other. Both side surfaces of the portion E are covered by the extending portions 41a and 42a, respectively. Thereby, at the time of the tape feeding operation in which the top tape 15a is bitten and fed into the meshing portion E, the top tape 15a is always guided by the extending portions 41a and 42a on both sides. Accordingly, even if the feeding direction of the top tape 15a is somewhat deviated from the normal direction for some reason, there is no problem that the top tape 15a is disengaged from the meshing portion E.

  FIG. 7 shows an operation when the top tape 15a is sandwiched between the first roller 34 and the second roller 33 and is engaged with the flat teeth 33a and 34a. In this operation, the bent portion 42 b provided on the upper portion of the lever member 42 is gripped, and the lever member 42 is rotated around the shaft fulcrum 43 to a position where it abuts against the stopper 44 against the urging force. Accordingly, a space S is generated at the position where the meshing portion E is in the state shown in FIG. At this time, the position of the stopper 44 is set such that the outer peripheral end of the extending portion 41 a does not come off from the side surface 33 b of the second roller 33.

In this state, the dimension “a” shown in FIG. 5B is set to be larger than the dimension “b” by a predetermined dimension, so that the outer peripheral end of the extended portion 42 a is at a position that is disengaged from the side surface 34 c of the first roller 34. . Accordingly, a gap G that is not covered by the extending portion 42a is formed on the side surface 33c, 34c side of the space S with a size corresponding to the predetermined dimension. In the operation of sandwiching the top tape 15 a between the first roller 34 and the second roller 33, the top tape 15 a is positioned in the space S using this gap G. Accordingly, even when the top tape 15a is thin, easily bent, and easily bent, the top tape 15a can be easily placed between the first roller 34 and the second roller 33 through the gap G from the side surface side. It can be put in and attached.

  In the present embodiment, the gap G is formed on the side surfaces 33c and 34c of the space S by making the dimension a of the extension 41a larger than the dimension b of the extension 42a. Depending on the convenience of component arrangement in the top tape feeding mechanism 22, the direction in which the gap G is formed may be changed to the opposite side. In this case, the dimension setting of the dimension a of the extending part 41a and the dimension b of the extending part 42a is reversed from the above example, and the gap part G is formed on the side surfaces 33b and 34b side of the space S. . That is, in the state where the second roller 33 is separated from the first roller 34, the side surface 33b, 34b side or side surface of the space S generated at the position where it is the meshing portion E in the approached state shown in FIG. A gap G that is not covered by the extended portion 41a that is the first guide member or the extended portion 42a that is the second guide member is formed on either side surface on the 33c, 34c side.

  As described above, in the present embodiment. The first roller 34 and the second roller 33 constituting the top tape feeding mechanism 22 are provided with first guide members and second guide member extending portions that restrict positional deviation in the width direction in the top tape feeding operation. 41a and 42a are provided, and in a state where the second roller 33 is separated from the first roller 34, the extension portions 41a and 42a cover either side of the space S generated at the position where the engagement portion E is located. The flange member 41 and the lever member 42 are configured such that a gap S that is not formed is formed.

  Thus, the position in the width direction of the top tape 15a peeled from the base tape 15b without impairing the workability when the top tape 15a is inserted and mounted between the first roller 34 and the second roller 33. Deviation can be reliably prevented.

  The tape feeder of the present invention has an effect that the positional deviation in the width direction of the top tape peeled off from the base tape can be surely prevented, and the electronic component is taken out from the component supply unit by the mounting head and transferred to the substrate. This is useful in the field of electronic component mounting.

The top view of the electronic component mounting apparatus of one embodiment of this invention The fragmentary sectional view of the electronic component mounting apparatus of one embodiment of the present invention Structure explanatory drawing of the tape feeder of one embodiment of this invention Mechanism explanatory drawing of the tape feeder of one embodiment of the present invention Mechanism explanatory drawing of the top tape feed mechanism of the tape feeder of one embodiment of the present invention Mechanism explanatory drawing of the top tape feed mechanism of the tape feeder of one embodiment of the present invention Operation | movement explanatory drawing of the top tape feed mechanism of the tape feeder of one embodiment of this invention

Explanation of symbols

3 Substrate 4 Component supply unit 5 Tape feeder 5a Frame unit (main unit)
5c Tape container 8 Loading head 15 Carrier tape 15a Top tape 15b Base tape 20 Rotation drive mechanism 21 Sprocket 22 Top tape feed mechanism 33 Second roller 34 First roller 35 Tension mechanism 41 Flange member 41a Extension part (first Guide member)
42 Lever member 42a Extension part (second guide member)
E meshing part S space G gap part

Claims (1)

A tape feeder that sequentially feeds electronic components to a pickup position by a mounting head by pitch-feeding a carrier tape holding electronic components,
The top tape, which is attached to the top surface of the carrier tape so as to cover the electronic component and is peeled off from the carrier tape before the pickup position, is sandwiched between a pair of rollers provided with meshing teeth on the outer peripheral surface and sent. With a top tape feeding mechanism that is stored in the tape storage container or discharged to the outside,
The top tape feeding mechanism is
A first roller that is pivotally supported by a main body constituting the main body of the tape feeder, and is driven to rotate in a rotational direction corresponding to the feeding direction of the top tape;
A second roller that is pivotally supported by a moving member, moves toward and away from the first roller by moving the moving member, and meshes with the first roller in a state of approaching the first roller;
The first roller and the second roller are provided on different side surfaces so as to extend outward in the radial direction from the respective outer peripheral surfaces, and regulate the positional deviation of the top tape in the width direction in the top tape feeding operation. A first guide member and a second guide member;
In a state in which the second roller is brought close to the first roller, both side surfaces of the meshing portion with which the meshing teeth of the second roller and the first roller mesh with each other are the first guide member and Covered by a second guide member;
In a state where the second roller was spaced first row La or al, on either side of the space formed in the position was engaged portion by said was approaching state, the first guide member or the A tape feeder, wherein a gap portion that is not covered by the guide member is formed.

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