Tape feeder
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- FUJI CORP
- Filing Date
- 2024-08-29
- Publication Date
- 2026-07-31
Smart Images
Figure 0007898484000001 
Figure 0007898484000002 
Figure 0007898484000003
Abstract
Description
Technical Field
[0001] This specification discloses a tape feeder.
Background Art
[0002] Conventionally, as this type of tape feeder, a tape feeding mechanism that pulls out and feeds a carrier tape wound around a reel from the reel, a tape peeling mechanism that peels off a top tape from the carrier tape, and a tape storage chamber that stores the peeled top tape have been proposed to be incorporated in a housing (for example, see Patent Document 1). The tape feeding mechanism includes a first sprocket that rotates by a rotational driving force transmitted from a motor and feeds out the carrier tape. The tape peeling mechanism includes a second sprocket that is engaged with a feed hole of the carrier tape and is rotationally driven by the carrier tape fed out along a predetermined path, and a pair of gears that mesh with each other. When the rotational driving force from the second sprocket is transmitted to one of the pair of gears, the pair of gears rotate in opposite directions to each other. The top tape is sandwiched between the pair of gears, and the pair of gears rotate in opposite directions to each other to feed out the top tape toward the tape storage chamber.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] However, the above-described tape feeder only feeds out the peeled top tape into the space defined as the tape storage chamber. For this reason, in order to be able to collect all of the top tape peeled from the carrier tape wound around the reel, a large space is required, leading to an increase in the size of the tape feeder.
[0005] The primary purpose of this disclosure is to properly recover cover tape detached from carrier tape and to miniaturize tape feeders. [Means for solving the problem]
[0006] This disclosure employs the following means to achieve the primary objectives described above.
[0007] The tape feeder of this disclosure is A tape feeder that feeds a component supply tape, which has a cover tape attached to a carrier tape containing multiple components, to a predetermined supply position, and exposes the components on the carrier tape by peeling off the cover tape from the carrier tape just before reaching the supply position, A pair of rotating members that peel the cover tape from the carrier tape by sandwiching and pulling the cover tape, A drum member that rotates and winds up the cover tape that has been pulled in by the pair of rotating members, The drive motor and A distribution mechanism that distributes torque from the drive motor to one of the pair of rotating members and the drum member, The gist of it is that it is equipped with the following features.
[0008] The tape feeder of this disclosure comprises a pair of rotating members that separate the cover tape from the carrier tape by gripping and pulling in the cover tape, and a drum member that rotates and winds up the cover tape pulled in by the pair of rotating members. Torque is transmitted from the same motor to one of the pair of rotating members and to the drum member via a disassembly mechanism. This allows for proper collection of the cover tape separated from the carrier tape, and also allows for a smaller tape feeder by sharing the drive source. [Brief explanation of the drawing]
[0009] [Figure 1] This is a schematic diagram of the component mounting machine. [Figure 2] It is a schematic configuration diagram of a tape feeder. [Figure 3] It is a block diagram showing the electrical connection relationship between the control device for the mounting machine and the control device for the feeder. [Figure 4] It is a schematic configuration diagram of a cover tape winding mechanism. [Figure 5] It is a cross-sectional view of a recovery drum. [Figure 6] It is a cross-sectional view of the cover tape wound around the drum body. [Figure 7] It is a schematic configuration diagram of an extension tape including a clamper. [Figure 8] It is a cross-sectional view of the second block. [Figure 9] It is an explanatory diagram showing the state of joining the cover tape to the extension tape. [Figure 10] It is an explanatory diagram showing the state of joining the cover tape to the extension tape. [Figure 11] It is a flowchart showing an example of a cover tape winding process. [Figure 12] It is a schematic configuration diagram of a clamper according to another embodiment. [Figure 13] It is a side view of a press-fitting member. [Figure 14] It is an explanatory diagram showing the state of joining the cover tape to the extension tape. [Figure 15] It is an explanatory diagram showing the state of joining the cover tape to the extension tape. [Figure 16] It is a schematic configuration diagram of a clamper according to another embodiment. [Figure 17] It is an explanatory diagram showing the state of joining the cover tape to the extension tape. [Figure 18] It is an explanatory diagram showing the state of joining the cover tape to the extension tape.
Mode for Carrying Out the Invention
[0010] Next, embodiments for implementing the present disclosure will be described while referring to the drawings.
[0011] FIG. 1 is a schematic configuration diagram of a component mounting machine. FIG. 2 is a schematic configuration diagram of a tape feeder. FIG. 3 is a block diagram showing an electrical connection relationship between a control device for a mounting machine and a control device for a feeder. FIG. 4 is a schematic configuration diagram of a cover tape winding mechanism. FIG. 5 is a cross-sectional view of a recovery drum. FIG. 6 is a cross-sectional view of a cover tape wound around a drum body. FIG. 7 is a schematic configuration diagram of an extension tape including a clamper. FIG. 8 is a cross-sectional view of a second block. In FIG. 1, the left-right direction is the X-axis direction, the front-back direction is the Y-axis direction, and the up-down direction is the Z-axis direction.
[0012] As shown in FIG. 1, the component mounting machine 10 includes a mounting machine main body including a control device 11 for a mounting machine (see FIG. 3), a substrate transfer device 12, a head 13, and a head moving device 14, and a tape feeder 20 that is detachable from the mounting machine main body. The substrate transfer device 12 transfers the substrate S by a belt conveyor. The head 13 includes a suction nozzle that can move up and down in the vertical direction (Z-axis direction), sucks a component with the suction nozzle, and mounts it on the substrate S conveyed by the substrate transfer device 12. The head moving device 14 moves the head 13 in the horizontal direction (XY-axis direction). In addition, the mounting machine main body further includes a parts camera 15 and a mark camera 16. The parts camera 15 images the component adsorbed by the suction nozzle from below to detect adsorption deviation. The mark camera 16 is installed on the head 13 or the head moving device 14, and images the reference mark attached to the substrate S from above to detect the position of the conveyed substrate S. The control device 11 for a mounting machine is composed of a well-known CPU, ROM, RAM, etc. The control device 11 for a mounting machine outputs control signals to the substrate transfer device 12, the head 13, the head moving device 14, etc., and inputs imaging signals from the parts camera 15 and the mark camera 16.
[0013] As shown in Figure 2, the tape feeder 20 is detachably held on a feeder stand (not shown) located on the front side of the mounting machine body. The tape feeder 20 comprises a feeder control device 21 (see Figure 3), a connector 22, a tape reel 30, a tape feeding mechanism 40, and a cover tape winding mechanism 50. These are housed in a rectangular feeder case 20a.
[0014] The tape reel 30 has a core 31 around which a component supply tape 34, with a cover tape 36 attached to the surface of a carrier tape 35, is wound, and a pair of reel flanges 32 provided on both sides of the core 31. The carrier tape 35 has a plurality of cavities formed therein, arranged at predetermined intervals along its longitudinal direction. Components are housed in each cavity. These components are protected by the cover tape 36 attached to the carrier tape 35.
[0015] The tape feeding mechanism 40 pulls out the carrier tape 35 (parts supply tape 34) from the tape reel 30 and feeds it to the parts supply position. The tape feeding mechanism 40 includes a sprocket 41 with engaging claws on its outer circumference that engage with sprocket holes formed at equal intervals on the carrier tape 35, and a drive motor 42 (for example, a stepping motor) that rotates the sprocket 41. The tape feeder 20 drives the sprocket 41 by a predetermined amount of rotation using the drive motor 42, and feeds out a predetermined amount of the carrier tape 35 engaged with the sprocket 41, thereby sequentially supplying the parts contained in the carrier tape 35 to the parts supply position. The parts contained in the carrier tape 35 are exposed at the parts supply position when the cover tape 36 is peeled off just before reaching the parts supply position, and are then picked up by a suction nozzle. The cover tape 36 attached to the carrier tape 35 is folded back in the opposite direction to the feed direction of the carrier tape 35 just before reaching the parts supply position, and is peeled off from the carrier tape 35 by being fed in the same reverse direction by the cover tape winding mechanism 50.
[0016] As shown in Figure 4, the cover tape winding mechanism 50 includes a pair of winding gears 51a, 51b, a drive motor 52 (for example, a stepping motor), a plurality of first transmission gears 53a to 53c, a plurality of second transmission gears 54a to 54d, and a recovery drum 60.
[0017] The pair of winding gears 51a and 51b mesh with each other and are installed inside the feeder case 20a on the opposite side of the carrier tape 35 in the feeding direction (rightward in Figure 2). One of the pair of winding gears 51a, 51b, is a drive gear that rotates when torque is transmitted from the drive motor 52. The other winding gear 51b is a driven gear that rotates in the opposite direction as the other winding gear 51a rotates. The pair of winding gears 51a and 51b rotate in opposite directions by torque from the drive motor 52 while sandwiching the cover tape 36. As a result, the cover tape 36, which has been folded back in the opposite direction to the feeding direction of the carrier tape 35, is fed in that opposite direction and peeled off from the carrier tape 35. A tension detection sensor 55 is installed on the upstream side of the pair of winding gears 51a and 51b in the feeding direction of the cover tape 36. This sensor outputs an ON signal when a tension exceeding a predetermined tension is applied to the cover tape 36.
[0018] As shown in Figure 2, the recovery drum 60 is installed below the pair of winding gears 51a and 51b, close to the outer edge of the reel flange 32. As shown in Figure 5, the recovery drum 60 has a drum body 61, a drum shaft 62 that forms the rotation axis of the drum body 61, and a torque limiter 63 (for example, a spring-type torque limiter). A drum gear 62a is attached to the drum shaft 62 so that torque from the drive motor 52 is transmitted. The drum body 61 has a winding core 61a around which the cover tape 36 is wound, and a pair of drum flanges 61b (small diameter flanges) provided on both sides of the winding core 61a. The drum body 61 is rotated by the torque transmitted from the drive motor 52, thereby winding the cover tape 36, which has been fed by the pair of winding gears 51a and 51b, onto the winding core 61a for recovery.
[0019] The motor gear 52a, mounted on the rotating shaft of the drive motor 52, meshes with the winding gear 51a via a plurality of first transmission gears 53a to 53c, where adjacent gears mesh with each other. Furthermore, the motor gear 52a meshes with the drum gear 62a via a plurality of second transmission gears 54a to 54d, where adjacent gears mesh with each other. As a result, the torque from the drive motor 52 is distributed to the winding gear 51a and the drum gear 62a at a predetermined torque ratio, causing the pair of winding gears 51a and 51b and the recovery drum 60 (drum body 61) to rotate, respectively. In this embodiment, the first transmission gears 53a to 53c and the second transmission gears 54a to 54d are configured such that the torque distributed from the drive motor 52 to the winding gear 51a is greater than the torque distributed to the drum body 61 (and the torque distributed from the drive motor 52 to the drum body 61 is less than the torque distributed to the winding gear 51a). That is, the first transmission gears 53a to 53c and the second transmission gears 54a to 54d are configured such that the rotational speed ratio of the second transmission gears 54a to 54d (the ratio of the rotational speed of the drum body 61 to the rotational speed of the drive motor 52) is greater than the rotational speed ratio of the first transmission gears 53a to 53c (the ratio of the rotational speed of the winding gear 51a to the rotational speed of the drive motor 52). As a result, the cover tape winding mechanism 50 can, while sharing the drive source, apply tension to the cover tape 36 that is suitable for peeling when peeling the cover tape 36 from the carrier tape 35, and apply tension to the cover tape that is suitable for winding when winding and recovering the cover tape 36.
[0020] As shown in Figure 5, the torque limiter 63 is installed between the drum body 61 and the drum shaft 62. This torque limiter 63 slips when a torque exceeding a specified torque is applied to the drum body 61, and is configured, for example, as a spring-type torque limiter. This prevents excessive tension from being applied to the cover tape 36 when it is wound onto the drum body 61. When the cover tape 36 is peeled off from the carrier tape 35, adhesive and tape residue may be attached to the cover tape 36. Because the thickness of the cover tape 36 with contact material and tape residue attached is not uniform in the width direction, in a recovery drum 60B without a torque limiter, the cover tape 36 may be wound onto the drum body 61 with excessive tension. In this case, as shown in Figure 6, the cover tape 36 is prone to slippage in the width direction due to its uneven thickness. Furthermore, if the cover tape 36 wound onto the drum body 61 is misaligned in the width direction, the cover tape 36 may come into contact with the inner wall of the feeder case 20a, potentially causing an overload on the drive motor 52 and resulting in a winding failure. In this embodiment, the cover tape winding mechanism 50 is configured such that the torque distributed from the drive motor 52 to the drum body 61 is less than the torque distributed to the winding gear 51a, and the drum body 61 slips if excessive torque is applied to it. This allows the cover tape 36 to be wound onto the drum body 61 with the appropriate tension, preventing winding failures.
[0021] As shown in Figure 7, an extension tape 65 is connected to the core 61a around which the cover tape 36 of the drum body 61 is wound. The extension tape 65 is used to compensate for the deficiency when the length of the leader section cover tape is shorter than the distance from the peeling position of the cover tape 36 to the recovery drum 60. In particular, in the case of a partially used tape reel 30, the extension tape 65 is necessary because there is no leader section.
[0022] The tip of the extension tape 65 is provided with a clamp 70 for joining it to the tip of the cover tape 36. The clamp 70 has a first block 71 fixed to the tip of the extension tape 65, a loop-shaped (U-shaped) wire 75 fixed to the tip of the first block 71, and a second block 72 that is slidable in the direction of extension of the wire 75. Gear teeth 71a and 72a that mesh with a winding gear 51a are formed on one side of the first block 71 and the second block 72 so that they can pass between a pair of winding gears 51a and 51b. As shown in Figure 8, the second block 72 has through holes 72b and 72c that are spaced apart in the width direction through which two straight portions of the wire 75 are inserted. The second block 72 also has a recess 72d that communicates with the through holes 72b and 72c and into which the loop tip of the wire 75 fits. The tip of the extension tape 65 and the tip of the cover tape 36 are joined by passing the tip of the cover tape 36 through the loop of the wire 75 (see Figure 9), and then sliding the second block 72 towards the tip of the loop to tighten the loop. As a result, as shown in Figure 10, the cover tape 36 is folded back in the loop of the wire 75, and the folded portion is clamped into the recess 72d of the second block 72. Since gear teeth 71a and 72a are formed on one side of the first block 71 and the second block 72, the front and back of the extension tape 65 can be easily identified. The drum body 61 is rotated with the tip of the extension tape 65 and the tip of the cover tape 36 joined together, thereby winding up and collecting the extension tape 65 and the cover tape 36.
[0023] Small-diameter drum flanges 61b are provided on both sides of the winding core 61a of the drum body 61. The extension tape 65 is guided by the drum flanges 61b when it is wound onto the winding core 61a. On the other hand, because the drum flanges 61b are small in diameter, the cover tape 36 is not guided by the drum flanges 61b when it is wound onto the winding core 61a. Since the drum body 61 is installed close to the outer edge of the reel flange 32, the cover tape 36 is wound so as to enter the interior of the pair of reel flanges 32, as shown in Figure 5. This makes it possible to make the tape feeder 20 smaller.
[0024] The feeder control device 21 is composed of a well-known CPU, ROM, RAM, etc. As shown in Figure 3, the feeder control device 21 outputs drive signals to the tape feeding mechanism 40 (drive motor 42) and the cover tape winding mechanism 50 (drive motor 52). The feeder control device 21 also receives detection signals from the tension detection sensor 55. The feeder control device 21 can communicate with the mounting machine control device 11 of the component mounting machine 10 to which the tape feeder 20 is mounted via the connector 22.
[0025] Next, the operation of the tape feeder 20 will be described. In particular, the operation of the drive motor 52 for peeling the cover tape 36 from the carrier tape 35 and collecting the peeled cover tape 36 will be described. Figure 11 is a flowchart showing an example of a cover tape winding process performed by the feeder control device 21. This process is performed when the mounting machine control device 11 of the component mounting machine 10, on which the tape feeder 20 is installed, requests the supply of components. When the mounting machine control device 11 requests the supply of components, the feeder control device 21 controls the drive motor 42 of the tape feeding mechanism 40 to rotate the sprocket 41 by a predetermined amount, thereby performing a carrier tape feeding process to feed out a predetermined amount of carrier tape 35. The cover tape winding process is performed by the feeder control device 21 together with the carrier tape feeding process.
[0026] When the cover tape winding process is performed, the feeder control device 21 determines whether the detection signal from the tension detection sensor 55 is an off signal (step S100). If the feeder control device 21 determines that the detection signal from the tension detection sensor 55 is an off signal, it drives the drive motor 52 (step S110) to terminate the cover tape winding process. On the other hand, if the feeder control device 21 determines that the detection signal from the tension detection sensor 55 is an on signal and not an off signal, it stops the drive motor 52 (step S120) to terminate the cover tape winding process. This allows the cover tape 36 to be peeled from the carrier tape 35 with the appropriate tension and the peeled cover tape 36 to be wound onto the drum body 61.
[0027] Here, we will explain the correspondence between the main elements of this embodiment and the main elements described in the claims section. Specifically, the pair of winding gears 51a and 51b in this embodiment correspond to the pair of rotating members of this disclosure, the drum body 61 corresponds to the drum member, the drive motor 52 corresponds to the drive motor, and the first transmission gears 53a to 53c and the second transmission gears 54a to 54d correspond to the distribution mechanism. Also, the torque limiter 63 corresponds to the torque limiter.
[0028] It goes without saying that this disclosure is not limited in any way to the embodiments described above, and can be implemented in various forms as long as they fall within the technical scope of this disclosure.
[0029] For example, in the embodiment described above, the pair of winding gears 51a and 51b are formed by gears, but they may also be formed by rollers.
[0030] In the embodiment described above, the drum body 61 has small-diameter drum flanges 61b on both sides of the winding core 61a, but it may also be made without drum flanges. In this case, the drum body 61 can be brought closer to the tape reel 30, and the tape feeder 20 can be made even smaller.
[0031] In the embodiment described above, the clamper 70 clamps the cover tape 36 by passing the tip of the cover tape 36 through the loop of the wire 75 and sliding the second block 72 to tighten the loop. In contrast, the clamper 170 according to another embodiment shown in Figure 12 may include a press-fit member 173 that includes a protrusion 173a which is press-fitted into the recess 72d of the second block 72. As shown in the side view of Figure 13, one side of the protrusion 173a of the press-fit member 173 is tapered so that its thickness gradually decreases towards the tip. In this clamper 170, the cover tape 36 is joined by passing the tip of the cover tape 36 through the loop of the wire 75 and sliding the second block 72 toward the tip of the loop to press-fit the protrusion 173a into the recess 72d of the second block 72. As a result, the cover tape 36 is clamped between the recess 72d of the second block 72 and the protrusion 173a of the press-fitting member 173 (see Figure 14). Furthermore, since the protrusion 173a of the press-fitting member 173 decreases in thickness towards the tip, it can be clamped effectively even when clamping cover tapes 36 of different thicknesses (see Figure 15).
[0032] Furthermore, the clamper 270 according to another embodiment shown in Figure 16 has a pair of V-shaped notches 270a and 270b that extend from both sides toward the tip and become closer to each other. In this clamper 270, the cover tape 36 is joined by wrapping the tip of the cover tape 36 between the pair of notches 270a and 270b (see Figure 17) and pulling the cover tape 36 away from the extension tape 65 (see Figure 18). As a result, the cover tape 36 bites into the pair of notches 270a and 270b and is clamped. To release the clamp of the cover tape 36, simply pull the cover tape 36 in the opposite direction.
[0033] As described above, the tape feeder of the present disclosure is a tape feeder that sends a component supply tape, which has a cover tape attached to a carrier tape containing a plurality of components, to a predetermined supply position, and exposes the components on the carrier tape by peeling the cover tape off the carrier tape just before reaching the supply position, and comprises a pair of rotating members that peel the cover tape off the carrier tape by gripping and pulling in the cover tape, a drum member that rotates and winds up the cover tape that has been pulled in by the pair of rotating members, a drive motor, and a distribution mechanism that distributes the torque from the drive motor to one of the pair of rotating members and the drum member.
[0034] The tape feeder of this disclosure comprises a pair of rotating members that separate the cover tape from the carrier tape by gripping and pulling in the cover tape, and a drum member that rotates and winds up the cover tape pulled in by the pair of rotating members. Torque is transmitted from the same motor to one of the pair of rotating members and to the drum member via a disassembly mechanism. This allows for proper collection of the cover tape separated from the carrier tape, and also allows for a smaller tape feeder by sharing the drive source.
[0035] In the tape feeder of this disclosure, the distribution mechanism may distribute a larger torque to the one rotating member than to the drum member. In this case, the distribution mechanism includes a first transmission gear that transmits torque from the drive motor to the one rotating member, and a second transmission gear that transmits torque from the drive motor to the drum member, and it is even preferable that the ratio of the output rotational speed to the input rotational speed of the second transmission gear is greater than that of the first transmission gear. In this way, while sharing the drive source, it is possible to apply tension to the cover tape that is suitable for peeling when peeling the cover tape from the carrier tape, and to apply tension to the cover tape that is suitable for winding when winding and collecting the cover tape.
[0036] Furthermore, the tape feeder of this disclosure is even better if it is equipped with a torque limiter provided on the rotating shaft of the drum member. This allows the tension acting on the cover tape when it is wound onto the drum member to be maintained within an appropriate range, thereby suppressing the occurrence of cover tape winding defects.
[0037] Furthermore, in the tape feeder of this disclosure, the drum member may be further provided with an extension tape, one end of which is connected to the core of the drum member and the other end of which is connected to the leading edge of the cover tape. This allows for compensation of the insufficient length when the cover tape length of the reader section is shorter than the distance from the peeling position of the cover tape to the drum member. Moreover, if the reader section is missing due to partial use or other reasons, an extension tape is necessary.
[0038] Furthermore, the tape feeder of this disclosure may include a control device for controlling the drive motor and a tension detection sensor for detecting the tension of the cover tape being pulled in by the pair of rotating members, wherein the control device drives the drive motor when the tension detection sensor does not detect a tension above a threshold, and stops driving the drive motor when the tension detection sensor detects a tension above the threshold. In this way, the cover tape can be peeled off the carrier tape with appropriate tension. [Industrial applicability]
[0039] This disclosure can be used in industries such as the manufacturing of tape feeders and component mounting machines. [Explanation of Symbols]
[0040] 10 Component mounting machine, 11 Control device for mounting machine, 12 Board transport device, 13 Head, 14 Head moving device, 15 Parts camera, 16 Mark camera, 20 Tape feeder, 20a Feeder case, 21 Control device for feeder, 22 Connector, 30 Tape reel, 31 Core, 32 Reel flange, 34 Component supply tape, 35 Carrier tape, 36 Cover tape, 40 Tape feeding mechanism, 41 Sprocket, 42 Drive motor, 50 Cover tape winding mechanism, 51a, 51b Winding gear, 52 Drive motor, 52a Motor gear, 53a~53c First transmission gear, 54a~54d Second transmission gear, 55 Tension detection sensor, 60, 60B Recovery drum, 61 Drum body, 61a Core, 61b Drum flange, 62 Drum shaft, 62a Drum gear, 63 Torque limiter, 65 Extension tape, 70, 170, 270 Clamper, 71 First block, 71a Gear teeth, 72 Second block, 72a Gear teeth, 72b, 72c Through hole, 72d Recess, 75 Wire, 173 Press-fit member, 173a Protrusion, 270a, 270b Notch, S Substrate.
Claims
1. A tape feeder that houses a reel around which a parts supply tape is wound, the parts supply tape being formed by attaching a cover tape to a carrier tape containing multiple parts, and feeds the parts supply tape from the reel to a predetermined supply position, and exposes the parts on the carrier tape by peeling off the cover tape from the carrier tape just before reaching the supply position, The drum member is equipped with a rotating mechanism for winding up the peeled-off cover tape, The drum member is equipped with an extension tape, one end of which is connected to the winding core of the drum member and the other end of which is connected to the tip of the cover tape by a clamp, and is positioned diagonally opposite the supply position with respect to the reel. Tape feeder.
2. A tape feeder according to claim 1, Drum flanges are provided on both sides of the winding core of the drum member to guide the winding of the extension tape. Tape feeder.
3. A tape feeder according to claim 2, Reel flanges are provided on both sides of the winding core of the reel. The drum member is installed in close proximity to the outer edge of the reel flange of the reel, The drum flange has an outer diameter that is sized to guide the extension tape wound onto the core of the drum member, but not to guide the cover tape wound onto the core of the drum member. The cover tape is wound onto the core of the drum member so that it enters the interior of the reel flange, as the drum member is installed in close proximity to the reel flange. Tape feeder.