Tape feeder and taping machine

Abstract

To provide a tape feeder and a taping machine which are advantageous for feeding a carrier tape so as to position each storage section at a desired position with high accuracy. [Solution] A tape feeding device that feeds a carrier tape having a plurality of storage sections for electronic components includes a control device, a transport device that transports the carrier tape along a transport path based on a tape transport amount, and a deviation amount acquisition device that acquires a positional deviation amount of each storage section on the transport path. If the positional deviation amount exceeds an allowable range (N in S2), the control device determines a correction amount for the tape transport amount based on the positional deviation amount and performs a correction process that reflects the correction amount in the tape transport amount (S3), controls the transport device so that the carrier tape is transported based on the tape transport amount after the correction process, and does not perform the correction process if the positional deviation amount is within the allowable range (Y in S2).

Description

[Technical field]

[0001] The present disclosure relates to a tape feeding device and a taping machine. [Background technology]

[0002] A taping machine is known that thermocompresses a top tape onto a carrier tape, thereby sealing workpieces (such as electronic components) contained in each of a number of recesses provided in the carrier tape with the carrier tape and top tape (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-41083 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to accommodate a workpiece in each of the numerous recesses (accommodation portions) provided in the carrier tape, the carrier tape is fed so as to sequentially position the recesses at predetermined insertion positions, and a workpiece is inserted into each of the recesses that are positioned in the insertion positions one after another.

[0005] However, due to various factors such as manufacturing errors, the numerous recesses formed on the carrier tape are not necessarily all formed exactly at the desired positions on the carrier tape, and may include recesses formed in positions shifted from their original positions.

[0006] When a workpiece is inserted into a recess formed at such an offset position, the workpiece may not be inserted (housed) properly because the recess may be actually positioned at an offset position from the insertion position. In some cases, the carrier tape (e.g., an edge portion defining the recess) and the workpiece may collide with each other unintentionally and receive a large force, which may result in damage to the carrier tape and / or the workpiece.

[0007] The present disclosure has been made in consideration of the above-mentioned circumstances, and provides a tape feeding device and a taping machine that are advantageous for transporting a carrier tape so as to position each housing portion at a desired position with high accuracy. [Means for solving the problem]

[0008] One aspect of the present disclosure relates to a tape feeding device that feeds a carrier tape having a plurality of work storage sections, the tape feeding device including a control device, a transport device that transports the carrier tape along a transport path based on a tape transport amount, and a deviation amount acquisition device that acquires a positional deviation amount of each storage section on the transport path, wherein when the positional deviation amount exceeds an allowable range, the control device determines a correction amount for the tape transport amount based on the positional deviation amount and performs a correction process to reflect the correction amount in the tape transport amount, controls the transport device so that the carrier tape is transported based on the tape transport amount after the correction process, and when the positional deviation amount is within the allowable range, does not perform the correction process.

[0009] The carrier tape may have a plurality of position reference portions arranged at equal intervals, and the deviation amount acquisition device may acquire the amount of position deviation of each storage portion by comparing the positions of the plurality of position reference portions with the positions of the plurality of storage portions.

[0010] The carrier tape may have a plurality of conveying holes, the conveying device may have a conveying body, and the carrier tape may be conveyed by applying a conveying force from the conveying body to the carrier tape while the conveying body is inserted into one or more conveying holes, and the deviation amount acquisition device may use the plurality of conveying holes as a plurality of position reference portions.

[0011] The conveying device may have a conveying motor that operates based on a drive signal input under the control of a control device, and the amount of carrier tape conveyed by the power output from the conveying motor may be determined based on the number of pulses of the drive signal, and the control device may determine the drive signal to have a number of pulses corresponding to the amount of tape conveyance, and if the amount of positional deviation exceeds an acceptable range, may determine the drive signal to have a number of pulses corresponding to the amount of tape conveyance after correction processing.

[0012] The control device may determine the pulses of the drive signal based on the number of pulses corresponding to the amount of tape transport so that the transport motor is driven at a pulse rate according to the number of pulses corresponding to the amount of tape transport, and if the amount of positional deviation exceeds an acceptable range, may determine the pulses of the drive signal based on the number of pulses corresponding to the amount of tape transport after correction processing.

[0013] Another aspect of the present disclosure relates to a taping machine including the above-mentioned tape feeding device that feeds a carrier tape having a plurality of storage sections for workpieces, and a tape splicing device that splices a top tape to the carrier tape so as to cover the plurality of storage sections. Effect of the Invention

[0014] According to the present disclosure, it is possible to provide a tape feeding device and a taping machine that are advantageous for transporting a carrier tape so as to position each housing section at a desired position with high accuracy. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of an example of a taping machine. [Diagram 2] FIG. 2 is a functional block diagram showing an example of the connection configuration of the control device, the deviation amount acquisition device, and the transport device (particularly the transport motor). [Diagram 3] FIG. 3 is an enlarged plan view showing a schematic configuration of an example of a carrier tape. [Figure 4] FIG. 4 is a side view showing a schematic configuration of an example of the transport device. [Diagram 5] FIG. 5 is a flow chart showing an example of a tape feeding method for feeding a carrier tape by a taping machine (particularly, a carrier tape feeding device). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[0017] In the following description, the terms "upstream" and "downstream" are based on the running direction of the various tapes (carrier tape, top tape and work sealing tape) during normal operation of the taping machine 10, and the various tapes are fed from upstream to downstream.

[0018] FIG. 1 is a diagram showing a schematic configuration of an example of a taping machine 10. As shown in FIG.

[0019] The taping machine 10 shown in FIG. 1 includes a carrier tape feeder for feeding a carrier tape Ta, a top tape feeder for feeding a top tape Tb, and a tape splicing device 27 for splicing the top tape Tb to the carrier tape Ta to produce a work sealing tape Tc.

[0020] The carrier tape Ta has a plurality of bottomed recesses used as workpiece storage sections, and a workpiece (electronic component such as a capacitor in this example) is inserted and stored in each recess by the workpiece supply device 30. The top tape Tb is overlaid on the carrier tape Ta so as to cover the recesses in which the workpieces are stored, and is thermocompression bonded to the carrier tape Ta by the tape bonding device 27. In the workpiece sealing tape Tc thus produced, the workpieces stored in each recess are individually sealed by the carrier tape Ta and the top tape Tb. The carrier tape Ta and the top tape Tb can be made of, for example, resin and / or paper, but can also be made of any other material that can be appropriately bonded to each other (thermocompression bonded in this example).

[0021] The carrier tape Ta is transported along the transport path P by the transport device 20, and after being unwound from the carrier tape supply roller 15, it is guided by the guide roller R and sent sequentially to the position deviation acquisition position P1, the work supply position P2, and the joining position P3.

[0022] The top tape Tb is fed from the top tape supply roller 16 and then fed to the splicing position P3 while being guided by the guide roller R. In this example, the top tape Tb is spliced ​​to the carrier tape Ta by the tape splicing device 27 at the splicing position P3, and then transported downstream together with the carrier tape Ta as the work sealing tape Tc. Therefore, the top tape Tb is fed from the top tape supply roller 16 and transported toward the splicing position P3 by the transport force received from the carrier tape Ta in the state of the work sealing tape Tc.

[0023] The workpiece sealing tape Tc is sent downstream by the conveying force of the conveying device 20 that sends the carrier tape Ta downstream, and is finally taken up by the tape recovery roller 17. The tape recovery roller 17 is actively rotated by a driving device (motor or the like) not shown, and actively takes up the workpiece sealing tape Tc sent from the tape splicing device 27.

[0024] 1 includes a part feeder 31 and an index table 32. The part feeder 31 receives a large number of workpieces either manually or mechanically, and provides the supplied workpieces to the index table 32 one by one.

[0025] The index table 32 transports the workpieces supplied from the part feeder 31 to the workpiece supply position P2. The workpieces transported one after another by the index table 32 to the workpiece supply position P2 are inserted into and accommodated in the accommodation portion of the carrier tape Ta at the workpiece supply position P2. The index table 32 intermittently rotates about a rotation center axis extending along the height direction (vertical direction) in the example shown in FIG. 1, but is not limited to this. For example, the rotation center axis of the index table 32 may extend along a direction inclined with respect to the height direction, or may extend along the horizontal direction.

[0026] The method for storing the workpiece in the storage section of the carrier tape Ta from the index table 32 is not limited, and any method can be used. For example, a loading device (not shown) may apply a force to the workpiece located at the work supply position P2 in a contact or non-contact manner to move the workpiece into the storage section, or gravity may be used to move the workpiece located at the supply position P2 into the storage section.

[0027] 1 is provided at the work supply position P2, and applies a force while contacting a portion of the carrier tape Ta located at the work supply position P2, thereby feeding the carrier tape Ta downstream. In this manner, the transport device 20 of this example can transport the carrier tape Ta so as to adjust the position of the carrier tape Ta at the work supply position P2 with high accuracy.

[0028] A deviation amount acquisition device 25 is provided upstream of the work supply position P2 (between the carrier tape supply roller 15 and the work supply device 30 (particularly the index table 32) in the example shown in FIG. 1). The deviation amount acquisition device 25 acquires the amount of positional deviation of each storage section of the carrier tape Ta on the transport path P. The "amount of positional deviation" here refers to the amount of deviation from the desired position of the carrier tape Ta where the storage section is originally intended to be placed. The amount of positional deviation of each storage section acquired by the deviation amount acquisition device 25 includes the amount of positional deviation in the transport direction Dt of the carrier tape Ta (hereinafter also referred to as the "tape transport direction").

[0029] FIG. 2 is a functional block diagram showing an example of the connection configuration of the control device 40, the deviation amount acquisition device 25, and the transport device 20 (particularly the transport motor 21).

[0030] The deviation amount acquisition device 25 shown in FIG. 2 transmits a deviation amount signal Sm indicating the positional deviation amount of each container to the control device 40.

[0031] The control device 40 controls the transport device 20 so that the carrier tape Ta is transported based on the tape transport amount. That is, the control device 40 determines the tape transport amount for each storage unit based on the positional deviation of each storage unit indicated by the deviation amount signal Sm from the deviation amount acquisition device 25, and transmits a motor drive signal Sd corresponding to the determined tape transport amount to the transport motor 21 of the transport device 20. The transport motor 21 operates based on the motor drive signal Sd from the control device 40. As a result, the transport device 20 is driven so that the carrier tape Ta is transported by the transport device 20 by the tape transport amount corresponding to the motor drive signal Sd.

[0032] When the tape feed amount is determined in this manner, if the positional deviation amount in the tape feed direction Dt of each storage unit exceeds the allowable range, the control device 40 performs a correction process on the tape feed amount based on the positional deviation amount. In this correction process, the control device 40 determines a correction amount for the tape feed amount for each storage unit based on the positional deviation amount, and reflects the correction amount in the tape feed amount. When the correction process is performed by the control device 40 in this manner, the carrier tape Ta is fed based on the tape feed amount after the correction process.

[0033] On the other hand, when the positional deviation amount in the tape transport direction Dt of each accommodation section is within the allowable range, the control device 40 does not perform a correction process based on the positional deviation amount for the tape transport amount. In this way, when the correction process is not performed by the control device 40, the carrier tape Ta is transported based on the original tape transport amount.

[0034] The value (boundary value) that defines the "tolerance" here is not limited, but is preferably determined based on the size (length) of each storage section in the longitudinal extension direction (corresponding to the tape transport direction Dt) of the carrier tape Ta and the size of the work (particularly the length of the work in the tape transport direction Dt based on the attitude of the work when stored in the storage section). In other words, it is preferable that the tolerance range is determined so that even if the work to be inserted into a storage section is relatively misaligned in the tape transport direction Dt with respect to the carrier tape Ta (particularly the corresponding storage section into which it is to be inserted), the work can be properly inserted into the corresponding storage section. Therefore, the absolute value of the boundary value of the "tolerance" here is preferably equal to or less than the difference between the "size of the work" and the "size of the corresponding storage section" in the tape transport direction Dt, and is preferably smaller than the difference, and may have a magnitude that is smaller than 50% of the difference, for example, 10 μm. R The length of each storage section in the extending direction of the carrier tape and the length of the work in the tape transport direction Dt may be any of the following values: ofIt is assumed that the difference may be within a range of, for example, "0.01 μm or more and 0.2 μm or less." The absolute value of the boundary value of the "tolerance range" for this assumed case may be set to a value within a range of, for example, "0.05 μm or more and 0.1 μm or less."

[0035] As described below, whether or not a correction process based on the positional deviation amount is performed, other processes for the tape feed amount (for example, an "adjustment process" based on the differential cumulative pulse number G described below) may be performed.

[0036] As described above, the tape feed amount is determined for each storage unit, and a corresponding tape feed amount is assigned to each storage unit. When the conveying device 20 positions each storage unit at the work supply position P2, the conveying device 20 conveys the carrier tape Ta downstream by the corresponding tape feed amount, so that all storage units provided on the carrier tape Ta can be individually positioned at the work supply position P2 with high accuracy.

[0037] Fig. 3 is an enlarged plan view showing a schematic configuration of an example of the carrier tape Ta. Fig. 4 is a side view showing a schematic configuration of an example of the conveying device 20.

[0038] The carrier tape Ta may have a plurality of position reference parts, and such a plurality of position reference parts may be provided at equal intervals in the tape transport direction Dt (extension direction of the carrier tape Ta). In this case, the deviation amount acquisition device 25 can acquire the amount of position deviation of each of the accommodating sections 52 by comparing the positions of such a plurality of position reference parts with the positions of the plurality of accommodating sections 52.

[0039] 3 has a plurality of transport holes 51 arranged in a straight line in the extension direction (corresponding to the tape transport direction Dt), and a plurality of storage sections 52 arranged in another straight line in the extension direction. The plurality of transport holes 51 and the plurality of storage sections 52 are basically provided on the carrier tape Ta so as to be disposed at equal intervals in the extension direction (tape transport direction Dt) of the carrier tape Ta. The interval (pitch) between the storage sections 52 in the extension direction (tape transport direction Dt) of the carrier tape Ta is not limited, but the plurality of storage sections 52 can be provided at a pitch of 1 mm, 2 mm, or 4 mm, for example.

[0040] Each transport hole 51 is formed with high precision at a desired position on the carrier tape Ta, basically without any positional deviation (particularly without any positional deviation in the extending direction (tape transport direction Dt) of the carrier tape Ta). On the other hand, each accommodation section 52 may have a positional deviation in the extending direction (tape transport direction Dt) of the carrier tape Ta due to manufacturing errors or the like, and the relative position of each accommodation section 52 with respect to the associated transport hole 51 (in this example, the one or two transport holes 51 located closest to each other) may deviate from the desired relative position.

[0041] The transport device 20 shown in Fig. 4 has a transport motor 21 (only the rotating shaft of the transport motor 21 is shown in Fig. 4) and a transport body 22 rotated by the transport motor 21. When a protruding portion of the transport body 22 protruding radially outward is inserted into one or more transport holes 51, the transport body 22 is rotated by the transport motor 21, whereby a transport force acts from the transport body 22 on the carrier tape Ta, and the carrier tape Ta is transported in the tape transport direction Dt.

[0042] As described above, when the carrier tape Ta is transported by rotating the protrusion of the transport body 22 while inserted into the transport hole 51, the transport hole 51 moves in the tape transport direction Dt by an amount corresponding to the amount of rotation of the protrusion of the transport body 22, and as a result, the carrier tape Ta is transported in the tape transport direction Dt by the desired amount.

[0043] The deviation amount acquisition device 25 of the present embodiment uses such a plurality of conveyance holes 51 as the above-mentioned plurality of position reference portions.

[0044] In the example shown in Figure 3, the multiple accommodating sections 52 of the carrier tape Ta include accommodating sections 52 that are arranged so that their positions in the carrier tape extension direction (tape transport direction Dt) coincide with those of each transport hole 51, and accommodating sections 52 that are arranged so that their positions in the carrier tape extension direction coincide with the central position between adjacent transport holes 51.

[0045] A virtual line L1 (i.e., a first auxiliary line extending in a direction perpendicular to the carrier tape extending direction) passing through the center of a storage section 52 provided so that the position in the carrier tape extending direction coincides with that of a transport hole 51 and extends in the tape width direction Dw passes through the center of the corresponding transport hole 51 when the storage section 52 is provided at a desired position on the carrier tape Ta. Moreover, the first auxiliary line L1 passing through the center of a storage section 52 provided so that the position in the carrier tape extending direction coincides with the center position between adjacent transport holes 51 and extending in the tape width direction Dw passes through the center position between the corresponding adjacent transport holes 51 when the storage section 52 is disposed at the desired position.

[0046] Therefore, the positional deviation amount of the accommodating section 52 that is provided so that the position of the carrier hole 51 coincides with the position in the carrier tape extension direction can be obtained based on the difference (distance) in the position between the center of the accommodating section 52 and the center of the corresponding conveying hole 51 in the carrier tape extension direction (tape conveying direction Dt). Similarly, the positional deviation amount of the accommodating section 52 that is provided so that the position in the carrier tape extension direction coincides with the center position between the adjacent conveying holes 51 can be obtained based on the difference (distance) in the position between the center of the accommodating section 52 and one or both centers of the corresponding adjacent two conveying holes 51 in the carrier tape extension direction (tape conveying direction Dt). When obtaining the positional deviation amount of the accommodating section 52 in this manner, the first auxiliary line L1 that passes through the center of each conveying hole 51 and / or each accommodating section 52 and extends in the tape width direction Dw, or the second auxiliary line L2 that passes through the center of the multiple conveying holes 51 and extends in the carrier tape extension direction (tape conveying direction Dt) may or may not be used.

[0047] In order to acquire the amount of misalignment of each of the storage sections 52 based on the above-mentioned technique, the misalignment amount acquisition device 25 may have an imaging device (not shown) that captures an image of the carrier tape Ta at the misalignment acquisition position P1, and an image analysis device (not shown) that analyzes the captured image acquired by the imaging device. In this case, under the control of the control device 40, the imaging device of the misalignment amount acquisition device 25 acquires a captured image of each of the storage sections 52 so that each of the storage sections 52 is captured together with the corresponding one or more conveying holes 51, and the image analysis device acquires the amount of misalignment of each of the storage sections 52 by analyzing the captured image.

[0048] The imaging device of the deviation amount acquisition device 25 may simultaneously capture images of two or more storage sections 52 and one or more transport holes 51 corresponding to the two or more storage sections 52, and cause the two or more storage sections 52 and the corresponding one or more transport holes 51 to appear in a single captured image. In this case, the image analysis device can acquire the positional deviation amounts of the two or more storage sections 52 from such a single captured image.

[0049] [Example of determining tape feed amount] Next, an example of a method for determining the tape feed amount will be described.

[0050] In the example shown below, the transport motor 21 of the transport device 20 is configured by a stepping motor, and the transport amount of the carrier tape Ta by the output power from the transport motor 21 is determined based on the number of pulses of the motor drive signal Sd input to the transport motor 21. That is, the control device 40 determines the motor drive signal Sd so that it has a number of pulses corresponding to the tape transport amount. Therefore, when the positional deviation amount of the accommodation portion 52 exceeds the allowable range, the control device 40 determines the motor drive signal Sd so that it has a number of pulses corresponding to the tape transport amount after the correction process.

[0051] The circumferential movement amount (resolution) A [μm / pulse] of the carrier 22 (carrier device 20) corresponding to one pulse of the motor drive signal Sd, the number of pulses (reference pulse number) B [pulses] of the motor drive signal Sd required to move the carrier 22 by the circumferential transport reference amount, and the circumferential movement amount (transport reference amount) C [μm] of the carrier 22 when the motor drive signal Sd of the reference pulse number B is input to the transport motor 21 are represented by the following relational expressions.

[0052] A = C / B [μm / pulse]

[0053] The "transport reference amount C" mentioned here corresponds to the distance (pitch) in the carrier tape extending direction (tape transport direction Dt) between adjacent accommodating portions 52 when it is assumed that each accommodating portion 52 is accurately provided at a desired position in the carrier tape Ta in the carrier tape extending direction.

[0054] When the amount of displacement of the accommodating portion 52 in the tape transport direction Dt is represented by "E", the quotient of "E / A" is represented by "q", and the remainder of "E / A" is represented by "r", the remainder r is represented by the following relational expression.

[0055] r = |E - (A × q)|

[0056] The "amount of displacement E [μm]" mentioned here corresponds to the transport correction amount with respect to the transport reference amount C of the carrier tape Ta, and is represented by plus (+) when the accommodating portion 52 is displaced to the advancing direction side (the right side shown by the arrow Dt in FIG. 3) with respect to the desired position, and is represented by minus (-) when it is displaced to the reverse advancing direction side (the left side of FIG. 3).

[0057] And the correction pulse number D [pulses] corresponding to the amount of displacement E [μm] of the accommodating portion 52 (the square hole pocket in the example shown in FIG. 3) is determined based on the following relational expression.

[0058] · When "(A / 2) < r (that is, A / 2 < |E - (A × q)|)" is satisfied: D = q + 1

[0059] · When satisfying "r ≦ (A / 2) (i.e., |E - (A×q)| ≦ (A / 2))": D = q

[0060] The correction pulse number D [pulses] mentioned here is expressed as an absolute value without the polarity of "plus" / "minus".

[0061] Based on the "reference pulse number B corresponding to the conveyance reference amount C" and the "correction pulse number D corresponding to the conveyance correction amount (position deviation amount E)" obtained as described above, the control device 40 determines the "drive pulse number F of the motor drive signal Sd corresponding to the tape conveyance amount". Specifically, the calculation method of the drive pulse number F is classified according to the conveyance correction amount (position deviation amount E) as follows.

[0062] · When satisfying "E < 0": F = B + D

[0063] · When satisfying "E = 0": F = B

[0064] · When satisfying "0 < E": F = B - D

[0065] In particular, the control device 40 of this example further determines the drive pulse F by performing an adjustment process considering the "differential cumulative pulse number G of the drive pulse F with respect to the reference pulse number B". The "differential cumulative pulse number G" mentioned here corresponds to the position deviation amount E of the preceding accommodation part 52 (hereinafter also referred to as the "preceding accommodation part 52") positioned at the work supply position P2 immediately before the target accommodation part 52 (hereinafter also referred to as the "target accommodation part 52").

[0066] That is, the tape conveyance amount (drive pulse number F) is derived by performing an adjustment based on the cumulative correction amount (differential cumulative pulse number G) for eliminating the position deviation amount E of the preceding accommodation part 52 in addition to the correction based on the conveyance correction amount (correction pulse number D) for eliminating the position deviation amount E of the target accommodation part 52 with respect to the conveyance reference amount C (reference pulse number B).

[0067] More specifically, the method for calculating the number of drive pulses F is classified as follows based on the differential cumulative pulse number G. Note that the differential cumulative pulse number G is represented by plus (+) when the preceding accommodation unit 52 is displaced to the advancing direction side (the right side indicated by the arrow Dt in FIG. 3) with respect to the desired position, and is represented by minus (-) when it is displaced to the reverse advancing direction side (the left side in FIG. 3).

[0068] · When "G < 0" is satisfied: F = F + |G|

[0069] · When "G = 0" is satisfied: F = F

[0070] · When "0 < G" is satisfied: F = F - |G|

[0071] As described above, when the amount of displacement of each accommodation unit 52 in the tape conveyance direction Dt exceeds the allowable range, the control device 40 determines the pulses of the motor drive signal Sd based on the number of pulses corresponding to the tape conveyance amount after the correction process. Further, when the above-described adjustment process based on the differential cumulative pulse number G is performed, the control device 40 determines the pulses of the motor drive signal Sd based on the number of pulses corresponding to the tape conveyance amount after the adjustment process.

[0072] Furthermore, after determining the number of drive pulses F corresponding to the tape conveyance amount as described above, the control device 40 may determine the pulses of the motor drive signal Sd based on the number of drive pulses F so that the conveyance motor 21 is driven at a pulse rate corresponding to the number of drive pulses F. The pulse rate mentioned here represents the speed of the conveyance motor (stepping motor) 21, is represented by the number of pulses per unit time, and is generally often represented in the unit of pps (pulse per second).

[0073] In general, the rotor of a stepping motor operates by the attractive and repulsive forces generated by sequentially switching the excitation of the parts of the stator that function as electromagnets. The rotor operating in this way may be stopped at a stable point while undergoing damping vibration, but may also be stopped between stable points when microstepping is used. When the rotor is stopped at a position between stable points (i.e., a position other than the stable points) in this way, damping tends to increase under the influence of inertia, etc. Therefore, from the viewpoint of suppressing damping, it is preferable for the rotor to be stopped at a stable point. The "stable point" referred to here is a position determined based on the torque due to the magnetic force acting between the stator and the rotor, and the rotor can be stopped at a stable point, for example, in the absence of an external force.

[0074] On the other hand, the stopping position of the rotor also depends on the pulse rate.

[0075] Therefore, when the control device 40 applies to the conveying motor 21 a motor drive signal Sd having a number of drive pulses F determined as described above for each storage section 52, it is advantageous in suppressing damping for the control device 40 to select a pulse rate at which the rotor of the conveying motor 21 can stop at a stable point and determine the pulses of the motor drive signal Sd based on that pulse rate.

[0076] Specifically, when neither the above-mentioned correction process nor adjustment process is performed, the optimal pulse rate for damping suppression for the number of drive pulses F is the pulse rate determined based on the reference number of pulses B. When the correction process is performed but not the adjustment process, the optimal pulse rate is the pulse rate determined based on the reference number of pulses B and the correction number of pulses D. When the correction process is not performed but the adjustment process is performed, the optimal pulse rate is the pulse rate determined based on the reference number of pulses B and the differential cumulative number of pulses G.

[0077] [Tape feeding method] FIG. 5 is a flowchart showing an example of a tape feeding method for feeding the carrier tape Ta by the taping machine 10 (particularly the carrier tape feeding device).

[0078] According to the tape feeding method shown in FIG. 5, the positional deviation amount of each of the housing portions 52 of the carrier tape Ta is obtained by the deviation amount obtaining device 25 (S1 in FIG. 5).

[0079] The control device 40 then determines whether the amount of misalignment in the tape feed direction Dt for each storage section 52 is within the allowable range (S2). If the control device 40 determines that the amount of misalignment of a storage section 52 exceeds the allowable range (N in S2), it performs the above-mentioned "correction process based on the amount of misalignment" on the tape feed amount for that storage section 52 (S3). On the other hand, if the amount of misalignment of a storage section 52 is determined to be within the allowable range (Y in S11), the control device 40 skips and does not perform the "correction process based on the amount of misalignment" on the tape feed amount for that storage section 52.

[0080] Then, the controller 40 performs the above-mentioned "adjustment process based on the differential cumulative pulse number G" on the tape feed amount for each of the accommodation sections 52 (S4).

[0081] The transport device 20 transports the carrier tape Ta in the tape transport direction Dt by the tape transport amount allocated to each storage section 52 (S5), thereby enabling each storage section 52 to be accurately positioned at the work supply position P2. As a result, the work can be accurately inserted from the work supply device 30 (particularly the index table 32) into each storage section 52 at the work supply position P2.

[0082] As described above, according to the taping machine 10 and carrier tape feeding device of this embodiment, a correction process is performed based on the amount of positional deviation of each storage section 52 as necessary to determine the amount of tape transport, so that each storage section 52 can be accurately positioned at the work supply position P2.

[0083] In particular, the necessity for such correction processing is determined by checking against a tolerable range the amount of positional deviation of each of the containers 52. By providing a dead zone for the correction processing in this manner, an improvement in processing speed can be expected.

[0084] As described above, according to this embodiment, it is possible to achieve a good balance between highly accurate positioning of each accommodation section 52 at the workpiece supply position P2 and simplification of the transport adjustment process of the carrier tape Ta.

[0085] [Variations] In the above embodiment, the single misalignment amount acquisition device 25 has an imaging device and an image analysis device, but the imaging device and the image analysis device may be provided as separate devices. For example, the misalignment amount acquisition device 25 may have an imaging device but not an image analysis device, and the control device 40 or another device may have the image analysis device. In this case, the control device 40 or another device analyzes the captured image sent from the misalignment amount acquisition device 25, and therefore essentially functions as "the misalignment amount acquisition device 25 that acquires the positional misalignment amount of each storage section 52."

[0086] It should be noted that the embodiments and modifications disclosed in this specification are merely illustrative and should not be construed as limiting in all respects. The above-mentioned embodiments and modifications can be omitted, substituted, and modified in various forms without departing from the scope and spirit of the appended claims. For example, the above-mentioned embodiments and modifications may be combined in whole or in part, and embodiments other than those described above may be combined with the above-mentioned embodiments or modifications. In addition, the effects of the present disclosure described in this specification are merely illustrative, and other effects may be obtained.

[0087] The technical category embodying the above technical idea is not limited. For example, the above technical idea may be embodied by a computer program for causing a computer to execute one or more procedures (steps) included in a method for manufacturing or using the above device. The above technical idea may also be embodied by a non-transitory recording medium readable by a computer on which such a computer program is recorded. [Explanation of symbols]

[0088] 10 taping machine, 15 carrier tape supply roller, 16 top tape supply roller, 17 tape recovery roller, 20 transport device, 21 transport motor, 22 transport body, 25 deviation amount acquisition device, 27 tape splicing device, 30 work supply device, 31 parts feeder, 32 index table, 40 control device, 51 transport hole, 52 storage section, B reference pulse number, C transport reference amount, D correction pulse number, Dt tape transport direction, Dw tape width direction, L1 first auxiliary line, L2 second auxiliary line, P transport path, P1 position deviation acquisition position, P2 work supply position, P3 splicing position, R guide roller, Sm deviation amount signal, Sd motor drive signal, Ta carrier tape, Tb top tape, Tc work sealing tape

Claims

1. A tape feeding device that feeds a carrier tape having a plurality of workpiece storage sections in a tape feeding direction, A control device; a transport device that transports the carrier tape along a transport path based on a tape transport amount; a displacement amount acquisition device that acquires a positional displacement amount of each storage unit on the transport path, The control device includes: When the amount of misalignment exceeds an allowable range, a correction amount for the tape transport amount is determined based on the amount of misalignment, and a correction process is performed to reflect the correction amount in the tape transport amount, and the transport device is controlled so that the carrier tape is transported based on the tape transport amount after the correction process. If the amount of positional deviation is within the allowable range, the correction process is skipped; The tolerance is determined so that an absolute value of a boundary value of the tolerance is equal to or smaller than a difference between a size of the workpiece in the tape transport direction and a size of the corresponding accommodation portion. Tape feed device.

2. the carrier tape has a plurality of position reference portions provided at equal intervals; the deviation amount acquisition device acquires the position deviation amount of each of the storage units by comparing positions of the plurality of position reference units with positions of the plurality of storage units.

2. The tape transport device of claim 1.

3. the carrier tape has a plurality of conveying holes; the conveying device has a conveying body, and conveys the carrier tape by applying a conveying force from the conveying body to the carrier tape while the conveying body is inserted into one or more conveying holes; the deviation amount acquisition device uses the plurality of conveyance holes as the plurality of position reference portions; 3. The tape transport device according to claim 2.

4. the transport device has a transport motor that operates based on a drive signal input under the control of the control device; a transport amount of the carrier tape by the power output from the transport motor is determined based on the number of pulses of the drive signal, the control device determines the drive signal so as to have a pulse number corresponding to the tape feed amount, and when the positional deviation amount exceeds the allowable range, determines the drive signal so as to have a pulse number corresponding to the tape feed amount after the correction process.

2. The tape transport device of claim 1.

5. the control device determines pulses of the drive signal based on the number of pulses corresponding to the tape transport amount so that the transport motor is driven at a pulse rate according to the number of pulses corresponding to the tape transport amount, and when the positional deviation amount exceeds the allowable range, determines pulses of the drive signal based on the number of pulses corresponding to the tape transport amount after the correction process.

5. The tape transport device according to claim 4.

6. The tolerance range is determined such that the absolute value of the boundary value of the tolerance range is 10 micrometers or less.

2. The tape transport device of claim 1.

7. A tape feeding device according to any one of claims 1 to 6, which feeds a carrier tape having a plurality of workpiece storage sections; a tape splicing device that splices a top tape onto the carrier tape so as to cover the plurality of housing portions; A taping machine comprising:

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