JP2004161320A - Taping machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a taping machine for rapidly and reliably accommodating a work without any damage and without generating any dead time when inserting the work in an insertion hole of a carrier tape. <P>SOLUTION: In the taping machine to insert a work such as an electronic component in an insertion hole provided in a carrier tape, a transfer table which receives the work from a part feeder and hold it by a holding groove formed on a discoid outer circumferential portion is disposed vertically above a guide to guide the carrier tape to the downstream side, the transfer table is turned synchronously with the motion of the carrier tape, a depressible pin is provided in the holding groove, and the work is pressed by the pin and inserted in the insertion hole of the carrier tape when the transfer table is stopped. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a taping machine for inserting a work such as an electronic component into an insertion hole of a carrier tape, and more particularly to a taping machine capable of quickly and reliably inserting a work without damaging the work.
[0002]
[Prior art]
In order to mount a work of an electronic component such as a resistor on a printed circuit board, the work is usually inserted into a hole of a carrier tape, and the work is taken out from the carrier tape and mounted on the printed circuit board. A so-called taping machine is used to insert a work into such a carrier tape.
The taping machine forms a plurality of insertion holes at intervals in the longitudinal direction of the carrier tape, inserts a work into each of the plurality of insertion holes, affixes a top tape to the surface of the carrier tape, and The bottom tape is adhered to prevent the work from jumping out of the insertion hole.
[0003]
In a taping machine, a disk-shaped rotor (transfer table) that receives chips (work) from a parts feeder is placed horizontally on a guide that guides the tape (carrier tape) downstream, facing the carrier tape. It is arranged. Then, with the work held in the chip supporting groove (holding groove) provided on the outer peripheral portion of the transfer table, the transfer table is rotated counterclockwise in synchronization with the movement of the carrier tape, and the rotation of the transfer table is performed. The transfer table is stopped so that the holding groove of the transfer table overlaps the chip loading hole (insertion hole) of the carrier tape conveyed in the same direction. Then, in order to prevent the work from dropping due to the stop of the transfer table, the work is sucked and held by the pusher pin (nozzle) provided on the holding groove and lowered, and the work is inserted into the insertion hole of the carrier tape. (For example, see Patent Document 1).
In another taping machine, a suction head is provided near the upper surface of a chip loading hole (insertion hole) of a tape (carrier tape), and the suction head sucks a chip (work) from a wheel (transfer table). Thus, the air enters the chip loading hole of the tape together with the air (for example, see Patent Document 2).
[0004]
[Patent Document 1]
JP-A-9-315403 (page 3, FIG. 1)
[Patent Document 2]
Japanese Patent No. 3080959 (page 3, FIG. 1)
[0005]
[Problems to be solved by the invention]
However, in the taping machine of Patent Literature 1 in which the work once sucked is forcibly pushed, when the work is pushed into the insertion hole, the processing pitch of the chip loading of the carrier tape has a variation within an allowable range. In some cases, the chip loading holes of the carrier tape may be slightly displaced, causing inconvenience such as breakage of the work.
In addition, there are cases where very small workpieces are handled. In this case, the air passages are small, and they are easily clogged with dust etc. and are physically unstable. However, there is a problem that the insertion is not performed in a normal shape or the insertion is performed at an angle.
Further, in order to securely store the work in the carrier tape, it is necessary to reduce the suction force or to cut off the work, and it takes a long time to insert the work, which makes high-speed processing difficult.
[0006]
Further, in the taping machine disclosed in Patent Literature 2 in which the work is sucked by air, the guide for correcting the posture of the work cannot be narrowed, and there may be a problem that the work does not enter the insertion hole properly. In addition, a work that is close to a square may be rotated and inserted, and some work may not be oriented normally.
[0007]
Therefore, the present invention solves the above-described disadvantages of the prior art, and does not cause a dead time when inserting a work into the insertion hole of the carrier tape, quickly and without damaging the work, without fail. It is an object to provide a taping machine capable of being stored.
[0008]
[Means for Solving the Problems]
According to another aspect of the present invention, there is provided a taping machine according to the present invention, wherein a workpiece such as an electronic component is inserted into an insertion hole provided in a carrier tape. A transfer table, which is received from and held by a holding groove formed in a disk-shaped outer peripheral portion, is vertically arranged above a guide for guiding the carrier tape to the downstream side, and the transfer table is mounted on the carrier. Rotating in synchronization with the movement of the tape, providing a pin that can come and go in the holding groove, and when the transfer table stops, pushing the work with the pin into the insertion hole of the carrier tape. I do.
[0009]
With such a configuration, in the taping machine according to the first aspect, when the transfer table rotates and stops at the stop position, even if the work is attached to the wall of the holding groove due to static electricity or the like, the tapping machine uses a pin. The work is stored in a short time because it is pushed and inserted into the insertion hole directly below.
[0010]
3. The taping machine according to claim 2, wherein before the holding groove holding the work reaches the stop position, the taping machine divides the work with air from a hole provided in the holding groove. When the holding groove holding the work reaches the stop position, the air is shut off and the work is inserted into the insertion hole of the carrier tape.
[0011]
With such a configuration, in the taping machine according to the second aspect, while the vertically arranged transfer table is rotating, the work in the holding groove is pressed against the wall in the holding groove by air. Therefore, there is no danger that the work in the holding groove will fall down even if the transfer table rotates and the work in the holding groove faces downward. Further, when the transfer table stops, although the work has inertia, the work is kept pressed against the wall of the holding groove by the air, so that the work is not shaken off and comes out of the insertion hole of the carrier tape.
[0012]
According to a third aspect of the present invention, in the taping machine according to the third aspect, the transfer table is rotated one step at a time by a stepping motor having a non-contact type brake, and the torque of the brake is reduced to about 25 times the torque of the stepping motor. ５０50%.
[0013]
With such a configuration, in the taping machine according to the third aspect, the transfer table stops quickly without damping, so that dead time does not occur, so that the transfer table is held in the holding groove of the transfer table. The work can be quickly and reliably stored in the insertion hole of the carrier tape without damage.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the taping machine according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view showing an outline of a taping machine of the present invention, FIG. 2 is a block diagram showing a system configuration of the taping machine of the present invention, and FIG. 3 is a detailed front view of a transfer table.
As shown in FIG. 1, the taping machine 1 includes a panel computer 2, a taping machine main body 3, a CCD monitor 4, a work insertion device 5, and a parts feeder 6.
The work referred to in the present embodiment is an electronic component or the like, and a minute work has a size of, for example, about 0.6 × 0.3 mm (plan view shape).
[0015]
A panel computer 2 is provided on the upper right side of the taping machine body 3, and a CCD monitor 4 is provided on the left side of the panel computer 2. A work insertion device 5 is mounted below the CCD monitor 4 in the taping machine body 3, and a parts feeder 6 is mounted on the upper left portion of the work insertion device 5.
[0016]
The taping machine main body 3 includes a carrier tape transport device 31, a bottom tape transport device 32, and a top tape transport device 33 as main components.
The carrier tape transport device 31 is disposed at a lower right portion of the taping machine main body 3, and the carrier tape 100 is transported from the carrier tape transport device 31. In order to guide the carrier tape 100 into the work insertion device 5, fixed rollers 3a, 3a... And a tension roller 3b are arranged over the lower left portion of the taping machine body 3.
The bottom tape transport device 32 is disposed below the work insertion device 5, and the bottom tape 101 is transported from the bottom tape transport device 32. In order to guide the bottom tape 101 into the work insertion device 5, fixed rollers 3c, 3c... And a tension roller 3d are disposed from the lower side to the left side of the bottom tape transport device 32. The bottom seal 105 is attached to the back side of the carrier tape 100.
The top tape transport device 33 is attached to the upper right side of the taping machine main body 3, and the top tape 102 is transported from the top tape transport device 33. In order to guide the top tape 102 into the work insertion device 5, fixed rollers 3e, 3e... And a tension roller 3f are arranged from the upper right portion of the taping machine body 3 to the upper portion of the work insertion device 5. Have been.
[0017]
As shown in FIG. 2, the panel computer 2 includes a display 11, an interface 12, a central processing unit (CPU) 13, and a hard disk 14. These are connected via a bus line 16.
The display 11 has a function of displaying various display data via the interface 12 and a function of giving a command to a central processing unit (CPU) 13 by touching a button displayed on the display 11.
The display 11 may be, for example, any of a liquid crystal display, a plasma display, a CRT display, and the like. Further, the command to the central processing unit (CPU) 13 may be given by a keyboard provided separately from the display 11.
[0018]
The transfer device 35 includes a measuring device 61, a CCD camera 62, and a work transfer device 63.
The measuring device 61 measures a resistance value, a capacity, and the like as characteristics of a work supplied from the outside, and the CCD camera 62 photographs the appearance of the work. The work transfer device 63 discharges the work determined as a defective product to the outside based on the image data captured by the CCD camera 62, and transfers the work determined as a non-defective product to the work insertion device 5.
[0019]
The work insertion device 5 includes a transfer table 51 and a guide 52, as shown in FIG. As shown in FIG. 3, the transfer table 51 is provided vertically on the taping machine main body 3 in a disk shape, and rotates counterclockwise. The transfer table 51 is disposed above a guide 52 for guiding the paper carrier tape 100 in the downstream direction (the direction of the arrow a in the figure).
[0020]
In the transfer table 51, for example, 50 holding grooves 51a are formed at equal intervals on the outer peripheral portion. This is because the characteristics of a stepping motor, which is a driving source to be described later, are rotated by a certain angle when a pulse signal is input once. When a pulse signal is input at a constant frequency, the motor rotates at a speed corresponding to the frequency. In consideration of this, the stop position of the transfer table 51 is determined to improve the accuracy. The transfer table 51 transfers the work (electronic components such as resistors) W transferred from the parts feeder 6 to the holding grooves 51a via the transfer device 35 (see FIG. 1) into a work input point 51b as a top dead center. The workpiece W is received and held one by one from the transfer device 35, and is rotated counterclockwise one step at a time, and the workpiece W is inserted into the insertion hole 100a of the carrier tape 100 at the workpiece transfer point 51c which is the bottom dead center and the stop position. Transfer. The transfer table 51 is configured to rotate in synchronization with the carrier tape 100 being conveyed. Therefore, at the work transfer point 51c, the holding groove 51a of the transfer table 51 and the insertion hole 100a of the carrier tape 100 are perfectly opposed to each other, so that the transfer is performed smoothly.
[0021]
To guide the work W held in the holding groove 51a of the transfer table 51 to the transfer table 51 side of the transfer device 35 provided between the parts feeder 6 and the transfer table 51, a disk-shaped transfer table 51 is provided. The transfer table guide 34 is formed in an arc shape having the same diameter as the transfer table 51 so as to follow.
[0022]
Next, details of the device configuration of the motor that drives the transfer table will be described with reference to FIG. FIG. 4 is a sectional view taken along line AA of FIG.
As shown in FIG. 4, the transfer table 51 is driven by a stepping motor 21, a non-contact type brake, for example, a hysteresis brake or a powder brake 23 is connected via a rigid joint 22, and an encoder is connected via a joint 24. 25 are connected.
The stepping motor 21 has a rated torque of 0.7845 N · m, and it is necessary to select a five-phase motor having the highest possible load torque and self-starting frequency. In particular, the driver needs to select a driver whose supply current is variable and whose standby current is variable in the range of 0 to 100%. Further, it is necessary to select a controller (so-called pulse generator) whose pulse rate is variable and whose pulse number can be set for each pulse rate.
[0023]
It is necessary to select a rigid joint 22 that can accurately transmit the braking force to the stepping motor 21. The helical coupling cannot be used because of its spring characteristics.
It is necessary to select a non-contact type brake (for example, hysteresis brake or powder brake 23) that is variable within a range of 0 to 50% with respect to the torque of the stepping motor 21.
The joint 24 is for connecting the encoder 25, and is arranged behind the brake. Therefore, it is necessary to select a joint having a small moment of inertia, regardless of the type.
The encoder 25 is for monitoring the operation of the stepping motor 21.
[0024]
In the holding groove 51a of the transfer table 51, a hole 51d for blowing air is formed in a portion of the bottom wall (upper side in the figure). Before the transfer table 51 reaches the work transfer point 51c from the hole 51d, air from a compressor (not shown) is blown out to press the work W against the wall of the holding groove 51a. This is such a size that the work W cannot be turned in the holding groove 51a, and the outside of the holding groove 51a is guided by the transfer table guide 34. By utilizing the property that the work W is pushed up against the wall without being pushed out by being swung upward from the side surface and pushing up the work W.
[0025]
Thus, when the transfer table 51 stops at the work transfer point 51c, the work W is kept pressed against the wall of the holding groove 51a, and is shaken down even when inertia is applied, and comes off the insertion hole 100a of the carrier tape 100. You don't have to. When the transfer table 51 stops at the transfer point 51c, the air stops, and the work W falls by its own weight and enters the insertion hole 100a of the carrier tape 100.
[0026]
As shown in FIG. 5A, reference numeral 34a denotes a work input port of the transfer table guide 34. The work input port 34a transfers a work (not shown) to the holding groove 51a of the transfer table 51 at the work input point 51b of the transfer table 51.
As shown in FIG. 5B, reference numeral 36 denotes a carrier tape cover for holding down the carrier tape 100 so that the carrier tape 100 does not undulate during the insertion of the work W. The carrier tape cover 36 has an opening 37 for inserting the work W into the insertion hole of the carrier tape 100, and also has a function of guiding the work W at the time of insertion.
[0027]
As shown in FIG. 5B, a hole 51d for blowing out the above-described air is provided in a bottom wall portion (not shown) of the holding groove 51a of the transfer table 51, and a hole in which the reciprocally movable pin 53 is protruded and retracted. Also serves as. The drive mechanism of the pin 53 is installed on the back side (the right side in the figure) of the transfer table 51. The pin 53 is driven vertically by the solenoid 54 shown in FIG. 4, and when the transfer table 51 stops at the work transfer point 51c, it descends from above, penetrates the hole 51d, and is held in the holding hole 51a. The pressed work W is dropped into the insertion hole 100a of the carrier tape 100.
[0028]
Next, a process of transferring a work to a carrier tape by the transfer table will be described with reference to FIG.
At the work input point 51b (see FIG. 3), the transfer table 51 receiving the work W from the work input port 34a of the transfer device 35 (see FIG. 1) into the holding groove 51a, as shown in FIG. The work W is guided by the transfer table guide 34 and rotates counterclockwise one step at a time.
[0029]
When the transfer table 51 holding the work W in the holding groove 51a approaches the work transfer point 51c, as shown in FIG. 6B, air is blown out from the hole 51d. The air passes through the gap between the holding groove 51a and the work W and strikes the transfer table guide 34 as shown by the arrow, and reversely presses the work W against the wall of the holding groove 51a.
[0030]
When the transfer table 51 stops at the work transfer point 51c, inertia acts on the work W, but the work W is still pressed against the wall of the holding groove 51a by the air, and is shaken down to insert the insertion hole of the carrier tape 100. It does not fall off from 100a. Then, as shown in FIG. 6C, the air is stopped.
[0031]
Next, as shown in FIG. 6D, the pin 53 is lowered from the hole 51d of the holding groove 51a, and the work W is pushed and dropped into the insertion hole 100a of the carrier tape 100.
At this time, the work W is delivered to the holding groove 51a of the transfer table 51 from the work input port 34a of the transfer device 35 (see FIG. 1) at the same time.
[0032]
As shown in FIG. 6E, the pin 53 provided on the back side (the right side in the figure) of the transfer table 51 is driven vertically by a solenoid 54 (see FIG. 4), and the hole 51d of the holding groove 51a. To come and go.
[0033]
As described in detail above, according to the taping machine of the present invention, when the transfer table 51 is stopped at the stop position, even if the work W51 is attached to the wall of the holding groove 51a due to static electricity or the like, the pin 53 is used. Since the work W51 is pushed to separate the work W51 from the holding groove 51a, the work W51 falls freely into the insertion hole 100a immediately below, and the insertion is quickly and reliably performed.
[0034]
By driving the transfer table 51, and sets the device configuration of the motor and a brake for braking as described below. With such a motor and brake device configuration, the transfer table 51 rotates one step at a time, and stops at a position where the holding groove 51 a of the transfer table 51 faces the insertion hole 100 a of the carrier tape 100. When the torque of the powder brake 23 is set to 25 to 50% of the torque of the stepping motor 21, the transfer table 51 can be quickly positioned with high accuracy without damping and stopped.
As a result, when the transfer table 51 stops, no dead time is generated. Therefore, the work W held in the holding groove 51a of the transfer table 51 is not damaged quickly by the insertion hole 100a of the carrier tape 100 without fail. Can be stored.
Although the embodiment of the present invention has been described with reference to a carrier tape made of paper, the present invention can also be applied to a carrier tape made of an embossed type or bottomless paper that does not require a bottom tape.
[0035]
【Example】
This is an experiment that "when the torque of the powder brake 23 is 25 to 50% of the torque of the stepping motor 21, the transfer table 51 can be quickly positioned with high accuracy and stopped without damping." It was obtained by Next, this experiment will be described.
[0036]
(Objective of the experiment)
(1) Complete stop at a predetermined position ⇒ High speed is required.
(2) To make the high-speed response of the stepping motor faster and more reliably, set the damping characteristic to zero.
(3) To cope with a mechanism that makes overshoot impossible.
(Experiment conditions)
(1) The number of output pulses per time is 20 pulses.
(2) The stepping motor 21 is set to a half step feed (0.36 ° / P).
(3) There are two types of load stress: 9021 Pa / 11180 Pa.
(4) The torque of the powder brake is 0.4903 Nm when 24 V is applied.
(5) A stepping motor having a torque of 0.7845 N · m is used.
(6) Transfer table (7) Drive motor and rigid joint (8) Drive motor, powder brake and rigid joint (9) Brake torque: 0.2452 N · m
(10) Driver setting: 0.9 to 1A (operating current)
: 0.6 A (stop current)
(Experimental procedure)
(1) The pulse rate is set by the controller so that the braking force of the powder brake 23 is set to 0 and the stepping motor 21 can be started and stopped quickly and smoothly. The setting of the pulse rate will be described later in detail.
(2) Increase the braking force within a range where the motor can continue stable operation.
(3) In order to observe the stopped state of the transfer table 51, a high-speed video of 1000 frames per second is used, which enables the holding groove 100a on the outer periphery of the transfer table 51 to be magnified 20 times.
[0037]
(Experimental result)
(1) In the case of a load stress of 9021 Pa (A) Setting of pulse rate (a) Pulse output completion time: 7 ms
After stopping once about 0.4 mm before the predetermined position, the robot arrives at the predetermined position with three fine advancements and stops completely.
Time from pulse output start to complete stop: 10 ms
(B) Pulse output completion time: 8 ms
After stopping once about 0.2 mm before the predetermined position, the robot reaches the predetermined position by one fine advance and stops completely.
Time from pulse output start to complete stop: 12 ms
(C) Pulse output completion time: 9 ms
The state is equivalent to (b).
Time from pulse output start to complete stop: 14 ms
(B) Setting of brake force (a) Pulse output completion time: 7 ms
Braking force is set to 0.04903 Nm (10%).
There is a step out.
(B) Pulse output completion time: 8 ms
Braking force is set to 0.1226 Nm (25%) and 25% of motor torque.
Observation of the high-speed video showed no damping.
Time from pulse output start to complete stop: 8 ms
(2) In the case of a load of 11180 Pa In the following procedure, the pulse rate was completely stopped without damping when the pulse rate was 0.2452 Nm (50%) at the output completion time of 10 ms and the motor torque was 50%.
Occasionally step-out is observed, thus increasing the motor driver current by about 10%. Time from pulse output start to complete stop: 10 ms
⇒From the above, when the load stress is 9021 Pa, the pulse output completion time is 8 ms / 20 P, the torque of the powder brake 23 is 25% of that of the stepping motor, and when the load stress is 11180 Pa, the pulse output completion time is 10 ms / 20 P, When the torque was set to 50% of that of the stepping motor, the transfer table 51 stopped quickly (8 ms to 10 ms) without damping.
[0038]
(Comparison with other braking methods)
(1) Mechanical damper: Remove the brake and use a mechanical damper at one end of the stepping motor for both shafts. Adjust pulse rate and driver current to optimal conditions.
Pulse output time: 6ms / 20P
Transfer table stabilization time: 12ms / 20P (dumping time 6ms)
(2) Electric damper: An electric damper is used with a diode and a resistor, and is used together with a mechanical damper. Immediately after the completion of pulse output, the damping amount tends to decrease, but the complete settling time does not change.
(3) Final reverse pulse: It is difficult to set and the allowable range for the condition change is narrow.
[0039]
Next, an index test for setting the pulse rate will be described.
(Pulse rate)
(1) 20 pulses in total: 8 ms (pulse completion time)
After temporarily stopping one position before the holding groove 51a of the transfer table 51, it is moved to a predetermined position and stopped (complete stop): 12 ms
⇒ No return (2) 20 pulses in total: 7 ms (pulse completion time)
After stopping once about 0.1 to 2 mm, complete stop by fine advance three times: 10 ms
Stable operation even in 25 ms cycle
(Experimental considerations)
From the above experimental results, it is necessary to balance the load inertia force and the braking force in order to stop the stepping motor without damping. However, since there is a limit in the braking force of the motor, the inertial force and the braking force can be balanced by using an additional braking force such as a brake, and the stepping motor can be stopped without damping at all. Become.
[0041]
【The invention's effect】
As described above, according to the taping machine of the first aspect of the present invention, when the transfer table rotates and stops at the stop position, the work is attached to the wall of the holding groove by static electricity or the like. Can be stored in a short time because it is pushed with a pin and inserted into the insertion hole directly below.
[0042]
According to the taping machine according to the second aspect of the present invention, the work in the holding groove is pressed against the wall in the holding groove by air during rotation of the vertically arranged transfer table. Even when the transfer table rotates and the work in the holding groove faces downward, there is no possibility that the work falls down. Further, when the transfer table stops, although the work has inertia, the work is kept pressed against the wall of the holding groove by the air, so that the work is not shaken off and comes out of the insertion hole of the carrier tape.
[0043]
According to the taping machine according to the third aspect of the present invention, the transfer table stops quickly without damping, so that dead time does not occur. The carrier tape can be securely stored without damage to the insertion hole. Also, the present invention can be applied to an embossed type that does not require a bottom tape, and a carrier tape made of bottomless paper.
[Brief description of the drawings]
FIG. 1 is a front view showing an outline of a taping machine of the present invention.
FIG. 2 is a block diagram showing a system configuration of the taping machine of the present invention.
FIG. 3 is a detailed front view of a transfer table.
FIG. 4 is a sectional view taken along line AA of FIG. 3;
FIG. 5 is a detailed sectional view of a work transfer point of the transfer table.
6A and 6B are diagrams illustrating a process of transferring a work to a carrier tape by a transfer table, wherein FIG. 6A is an upper cross-sectional view of the transfer table, and FIG.
[Explanation of symbols]
1: Taping machine 3: Taping machine main body 5: Work insertion device 6: Parts feeder 21: Stepping motor 23: Powder brake 31: Carrier tape transfer device 34: Transfer table guide 34a: Work input port 35: Transfer device 51: Transfer Mounting table 51a: holding groove 51b: work input point 51c: work transfer point 51d: hole 52: carrier tape guide 53: pin 100: carrier tape 100a: insertion hole W: work

Claims (3)

In a taping machine that inserts a work such as an electronic component into an insertion hole provided in a carrier tape,
A transfer table that receives the work from a parts feeder and holds the work with a holding groove formed in a disk-shaped outer peripheral portion is disposed vertically above a guide for guiding the carrier tape to a downstream side,
The transfer table is rotated in synchronization with the movement of the carrier tape, and a pin which can be protruded and retracted in the holding groove is provided. When the transfer table stops, the work is pushed by the pin and the carrier tape is inserted. Put in the hole,
Taping machine characterized by the following. Before the holding groove holding the work reaches the stop position, the work is pressed against the wall of the holding groove by air from a hole provided in the holding groove, and the holding groove holding the work is moved to the stop position. When it reaches, the air is shut off and the work is inserted into the insertion hole of the carrier tape;
The taping machine according to claim 1, wherein: 2. The method according to claim 1, wherein the transfer table is rotated step by step by a stepping motor having a non-contact type brake, and the torque of the brake is set to approximately 25 to 50% of the torque of the stepping motor. Or the taping machine according to 2.

Images