JP2003188584A - Tape feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape feeder in which a top tape housed in a tape housing container after releasing can be surely discharging by a simple mechanism. <P>SOLUTION: The tape feeder for pitch feeding the tape loading electronic components comprises an openable cover member 15a provided at an outlet D of an opposite side to an inlet A in a tape housing container 1 receiving a top tape 10a released before a pick-up position, sandwiched between rotary feeding members 33 and 34 and fed from the inlet A and housing the tape 10a. Thus, at an ordinary time, the member 15e is held in a closed state by a magnet 15g, the tape 10a is closely concentrated in the container 15 to increase an elastic force F1 of the tape 10a to thereby set the member 15e to an open state. In this manner, the tape 10a can be surely discharged from the container 15 by a simple mechanism. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape feeder that pitches an electronic component held on a tape and supplies it to a pickup position of an electronic component mounting apparatus. 2. Description of the Related Art In an electronic component mounting apparatus, a method using a tape feeder is known as a method for supplying an electronic component to a pickup position of a nozzle of a transfer head.
In this method, a tape for holding an electronic component is pulled out from a supply reel, and pitch-fed in synchronization with the mounting timing of the electronic component to be supplied to a nozzle. A top tape is affixed to the upper surface of the tape to protect the electronic components and prevent them from falling off, and the top tape is peeled off from the upper surface of the base tape before being sent to the pickup position. Then, the peeled top tape is folded back in the direction opposite to the tape feeding direction, sandwiched between feeding rollers, etc., and guided to a tape storage container that houses the top tape. When the tape storage container is filled with the top tape, a tape discharging operation for opening the tape storage container and taking out the top tape inside is performed. This tape full detection is conventionally performed by counting the number of parts supplied to the tape feeder, and when a preset count value is reached, a full notification is given by a signal or the like. However, since the top tape is thin, flexible, and has low rigidity, the behavior of the top tape guided to the tape container is extremely unstable and can be folded several times. In addition, the occupied volume in a dense state is not always constant, and it is difficult to set an appropriate full count value. And if this setting is inappropriate,
The top tape cannot be fed, causing a malfunction of the tape feeder. As described above, the conventional tape feeder has a problem that it is difficult to reliably discharge the top tape. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tape feeder capable of reliably discharging the top tape stored in the tape storage container after peeling with a simple mechanism. According to a first aspect of the present invention, there is provided a tape feeder for feeding an electronic component to a pickup position of an electronic component mounting apparatus by pitch-feeding a tape holding the electronic component. And a top tape feeding means for feeding the top tape, which is attached to the top surface of the tape so as to cover the electronic component and peeled from the top surface of the tape before the pickup position, in a direction opposite to the tape feeding direction. Means for receiving and storing the top tape sent by the means from the introduction port and having a discharge port for discharging the top tape at the end opposite to the introduction port, and the tape storage container provided with the discharge port. A lid member that can be opened and closed freely, and the lid member is kept closed in a normal state, and the top tape is tightly sealed in the tape container. And lid closing means for opening the lid member by collecting and increasing the resilience of the top tape. According to the present invention, the lid member for opening and closing the discharge opening provided in the tape storage container is normally closed, and the top tape is densely packed in the tape storage container so that the top tape is elastic. By providing the lid closing means that is opened when the force is increased, the top tape can be reliably discharged by a simple mechanism. DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an electronic component mounting apparatus to which a tape feeder according to an embodiment of the present invention is mounted. FIG. 2 is a side view of the tape feeder according to an embodiment of the present invention.
3 is a mechanism explanatory view of a tape feeder according to an embodiment of the present invention, FIGS. 4 and 5 are operation explanatory views of a top tape feeding mechanism of the tape feeder according to an embodiment of the present invention, and FIG. Sectional drawing of the tape storage container of the tape feeder of one Embodiment, FIG. 7 is operation | movement explanatory drawing of the tape storage operation | movement in the tape storage container of the tape feeder of one Embodiment of this invention. First, an electronic component mounting apparatus will be described with reference to FIG. In FIG. 1, an electronic component mounting apparatus 1 is
Two mounting stages 2 are provided. The upstream mounting stage 2 has a substrate 4 through a substrate carry-in port 3 provided on the side surface.
Is brought in. An electronic component picked up from the component supply unit 5 is mounted on the substrate 4 positioned on a conveyance path (not shown). A plurality of tape feeders 8 are mounted on the component supply unit 5. The tape feeder 8 includes a component supply unit 5
A large number of units are arranged in parallel on a feeder base 6 provided in the machine, and a tape holding electronic components is pulled out from a supply reel 9 mounted on a carriage 7 and pitch-fed. As a result, the electronic component is supplied to the pickup position of the electronic component on each mounting stage 2. Next, the overall structure of the tape feeder 8 will be described with reference to FIG. As shown in FIG. 2, the tape feeder 8 is mounted on the upper surface of the feeder base 6 along the lower surface of the main body portion 8 a, and a locking portion 8 b provided projecting downward from the main body portion 8 a is attached to the feeder base 6. The tape feeder 8 is fixed by engaging with the end. Locking part 8b
Has a built-in connector for connecting electric wiring such as a power supply and control signal of the tape feeder 8 to an electric circuit of the electronic component mounting apparatus 1. By attaching the tape feeder 8 to the feeder base 6, Connection is completed. In FIG. 2, a sprocket 11 is disposed at the front end of the tape feeder 8 (on the right side in FIG. 2). The teeth of the sprocket 11 are tape feed holes 10d provided at a constant pitch on the tape 10 (see FIG. 3).
And the sprocket 1 by the tape feed mechanism 12.
By rotating the pitch of 1, the tape 10 having a configuration in which the top tape 10 a is adhered onto the base tape 10 b is pitch-fed. By this tape feeding, the tape 10 is pulled out from the supply reel 9. Pulled out tape 10
Is guided by a tape guide 16 provided at the rear end of the tape feeder 8, guided into the main body 8a from the tape introduction hole 8c, and fed forward along the tape feed path 8d. The tip of the tape feeder 8 is the transfer head 1.
7, the tape 10 that has been fed is pitch-fed under the pressing member 13 provided on the top surface of the tip. In the middle of this pitch feed, the electronic component 18 held in the recess 10 c of the base tape 10 b is picked up by the transfer head 17 through the opening 13 a provided in the pressing member 13. Prior to picking up the electronic component 18, the top tape 10 a is peeled from the upper surface of the base tape 10 b, folded back, and stored in the tape storage container 15 by the top tape feeding mechanism 14. Next, the tape feeding mechanism 12 and the top tape feeding mechanism 14 will be described with reference to FIGS. In FIG. 3, the sprocket 11 that pitch-feeds the tape 10 is rotationally driven by a motor 20. The sprocket 11 performs an intermittent rotation operation corresponding to the pitch feed operation, and the rotation stop position during the intermittent rotation is mechanically positioned by the positioning mechanism 23. Pins 11 a are provided on the outer periphery of the sprocket 11 at a constant pitch, and the pins 11 a are inserted into holes 10 d provided in the tape 10.
When the sprocket 11 is rotated in a state where the two are fitted, the tape is fed. A peeling member 13b is disposed in front of the pickup position by the transfer head 17, and the top tape 10a is peeled off from the upper surface of the tape 10 fed forward (rightward in the drawing) by the peeling member 13b. Wrapped backward. The folded top tape 10a is
The tape is fed into the tape container 15 by the rotary feed members 33 and 34 of the top tape feed mechanism 14. The rotary feed members 33 and 34 are rotated by rotating the motor 30 through the bevel gear 31 and the transmission gear member 32.
4 is performed. As shown in FIG. 4A, the rotary feed member 3
3 and 34 are spur teeth 33 on the outer periphery of the roller-like rotating body.
a and 34a are formed. When the transmission gear member 32 rotates in a state where the top tape 10a is sandwiched between the flat teeth 33a and 34a, the top tape 10
a is reliably fed into the tape container 15 without slipping. The motor 30, the transmission gear member 32, and the rotary feed members 33 and 34 serve as a top tape feed means that sandwiches the top tape 10a between a pair of roller-like rotating bodies and feeds the tape in a direction opposite to the tape feed direction to the pickup position. ing. A tension mechanism 35 having a movable tension roller 36 is provided on the front side of the rotary feed members 33 and 34.
Is arranged. The tension roller 36 is held by a lever member 38a having a fulcrum that is coaxial with the guide roller 37, and the peeled top tape 10a goes around the upper side of the guide roller 37 and the lower side of the tension roller 36 and is guided backward. . A spring 39 is coupled to the arm 38b integrated with the lever member 38a, and the lever member 38a and the arm 38b are always urged downward by the spring 39. As a result, the top tape 10a
Tension is applied to the tension roller 36. Referring to FIG. 4B, the tension mechanism 3
The operation of No. 5 will be described. When the top tape 10a is slackened at the position of the tension mechanism 35, the tension roller 36 moves downward. With this, the arm member 3
8b is rotated by the biasing force of the spring 39, and the dog 38c provided at the tip is displaced downward. And by detecting this displacement by the photoswitch 40,
The slack of the top tape 10a is detected. If slack is detected, the motor 30 is immediately driven to rotate, whereby the slack top tape 10a is fed into the tape container 15 and a predetermined tape tension is maintained. Next, referring to FIG. 5, the tape container 15
Rotating feed member 3 of top tape 10a fed into the inside
A top tape peeling mechanism for preventing the entanglement of the belts 3 and 34 will be described. As shown in FIG. 5, spur teeth 33a, 3
Two grooves 33b and 34b are formed in the circumferential direction on the outer peripheral surfaces of the rotary feed members 33 and 34 on which 4a is formed. The end portions 41a and 42a of the claw members 41 and 42 are inserted into the groove portions 33b and 34b from the tape container 15 side with a slight gap so as not to hinder the rotation of the rotary feed members 33 and 34. Yes. As shown in FIG. 5A, the rotary feed member 3
Since the top tape 10a sandwiched between the three and 34 flat teeth 33a and 34a and fed into the tape container 15 is thin and flexible, the flat teeth 33a and 34a.
Even after being removed from the sandwiched state due to the above, there is a tendency to move along the outer periphery of one of the rotary feed members 33 and 34 with the rotational movement of these spur teeth. At this time, a groove 33b provided on the outer periphery,
34b includes tip portions 41a and 42a of the claw members 41 and 42.
Is inserted, the movement of the top tape 10a in the outer peripheral direction of the rotary feed members 33, 34 is the tip 41a,
It is obstructed by 42a. And the top tape 10a
Moves along the claw members 41 and 42, and the rotary feed member 3
It peels from the outer periphery of 3,34. As a result, the top tape 10a is entangled with the rotary feed members 33 and 34, thereby preventing jamming that makes the tape feed impossible. Next, referring to FIG. 6, the tape container 15
Will be described. FIG. 6A shows a side cross section of the tape container 15 (a cross section of a space portion sandwiched between two vertical side walls not shown). The tape storage container 15 is a horizontal ceiling surface 15a, and the top tape 10 that is positioned at the end of the ceiling surface 15a and is fed by the rotation feeding members 33 and 34.
an introduction port A for introducing a, a discharge port D and an introduction port A for discharging the top tape provided at the end opposite to the introduction port A
To the discharge port D, an inner bottom surface that is inclined in the top tape feeding direction is provided. The inner bottom surface includes a first inclined surface 15b having an inclination angle θ1 provided in an introduction portion B into which the top tape 10a fed by the rotary feed members 33 and 34 is introduced through the introduction port A, and a first inclined surface 15b. A second inclined surface 15d having an inclination angle θ2 provided in a storage portion C that stores a predetermined amount by storing the top tape 10a sent through the first inclined surface 15b, and the first inclined surface 15b The second inclined surface 15d and the arcuate curved surface 15
The shape is continuous through c. The tape storage container 15 is shown in FIG.
As shown in height positions H1, H2, and H3 at three positions shown in (a), the inner height dimension gradually increases from the inlet A toward the outlet D. In addition, you may make it provide the horizontal part without an inclination angle in the inner bottom face of the discharge port D vicinity. A cover member 15e for closing the discharge port D is provided at the discharge port D at the end of the tape storage container 15 so as to be freely opened and closed by rotating around a hinge 15f provided at the lower end. A magnet 15g is provided at the upper end of the tape container 15, and the upper end of the lid member 15e is adsorbed by the magnetic force of the magnet 15g, so that the lid member 15e is closed with the outlet D closed. Then, by applying a load exceeding the attractive force of the magnet 15g to the lid member 15e from the inside, the lid member 15e rotates about the hinge 15f as a fulcrum and is in an open state (FIG. 7).
(See (c)). FIG. 6B shows the behavior of the top tape 10a in a state where the top tape 10a is sequentially fed into the tape storage container 15 and the top tape 10a is densely stored therein. The top tape 10a itself is a thin linear material that is very flexible and has little rigidity. However, when a large amount of the top tape 10a is pushed into a limited space such as the tape storage container 15, The top tape 10a behaves as a dense mass in each part. That is, when the top tape 10a having almost no rigidity is pushed into the space to form a dense lump, this lump has a resilient force against the external boundary that partitions the space, and the The greater the degree, the greater the elasticity. Therefore, in the introduction part B where the top tape 10a is forcibly fed from the introduction port A by the tape feeding means and becomes a highly dense lump state, the lump of the top tape 10a is elastically applied to the inner surface of the tape storage container 15. Exert power. Accordingly, as shown in FIG. 6B, a reaction force R (force in a direction perpendicular to the inner surface) from the ceiling surface 15a and the first inclined surface 15b acts on the top tape 10a in the lump state. . Here, in the first inclined surface 15b and the arcuate curved surface 15c in the vicinity of the introduction portion B, the tape storage container 15 has a shape in which the height dimension greatly expands in the tape discharging direction (arrow a). The reaction force R acting on is divided into a component force R1 perpendicular to the tape ejection direction and a component force R2 in the tape ejection direction. Then, component force R due to reaction force R acting on each part.
The resultant force of 2 becomes a tape feeding force F that moves the lump of the top tape 10a in the tape discharging direction. This tape feeding force F is remarkably generated in the introduction part B where the degree of spread is large and a large component force R2 is obtained. By this tape feeding force F, the lump of the top tape 10a inside the tape storage container 15 is sequentially pushed in the tape discharging direction and eventually reaches the discharge port D. Next, referring to FIG. 7, the tape container 15
The tape accommodating operation for accommodating the top tape 10a therein will be described. FIG. 7A shows an empty tape storage container 15.
With respect to the inside, the top tape 10a is rotated by the rotary feed member 33,
34 shows a state where the feeding has started. The top tape 10a fed in the initial line state is bent by bending due to resistance due to contact with the inner surface or entanglement between the tapes, and eventually becomes a lump state in which a large amount of the top tape 10a is concentrated. And this lump is shown in FIG.
Tape storage container 1 by tape feed force F shown in (b)
5 is moved in the tape discharging direction. Thereafter, when the feeding of the top tape 10a is continued, the lump of the top tape 10a finally reaches the inside of the lid member 15e closed by the magnet 15g. By continuing the feeding, the density of the top tape 10a in the vicinity of the inside of the lid member 15e gradually increases, and the resilience F1 exerted on the lid member 15e by the lump of the top tape 10a increases accordingly. . When the resultant force of the elastic force F1 exceeds the attractive force of the magnet 15g, the lid member 15e is detached from the attractive force of the magnet 15g and rotates around the hinge 15f as shown in FIG. 7C. Then, the discharge port D is opened. That is, the magnet 15g keeps the lid member 15e closed during normal times, and the top tape 10a is densely packed in the tape container 15 to increase the resilience F1 of the top tape 10a, thereby opening the lid member 15e. It is a lid closing means to make a state. In addition, as a lid closing means, other than the magnet 15g,
For example, a tape-like locking means that is released when the external force acting against the locking force exceeds a predetermined value may be used. As a result, the top tape 10a stored in the tape storage container 15 is discharged from the outlet D by itself.
The top tape 10a is discharged after spilling from the outside. At this time, the lump of the top tape 10a is sequentially pushed out by the tape feeding force F, and is not fixed in the storage portion C or the introduction portion B at the back from the discharge port D in the tape storage container 15. Top tape 1
There is no need to scrape 0a with a pin. Thus, the cover member 15e of the discharge port D is formed.
Is automatically opened, the machine operator can easily detect that the top tape is full in the tape feeder 8. of course,
The number of parts supplied by the tape feeder 8 is counted, and when the predetermined count value is reached, the top tape full notification may be performed by a notification means such as an indicator lamp or a buzzer. In any case, by adopting a configuration in which the lid member 15e is automatically opened as in the above-described embodiment, an erroneous setting of the count value,
Even when the machine operator misses the full notification, jamming due to excessive feeding of the top tape 10a into the tape storage container 15 does not occur.
Therefore, it is possible to effectively prevent an abnormal operation caused by a top tape discharge failure that has conventionally occurred. As described above, in the tape feeder 8 shown in the present embodiment, the lid member 15e for closing the discharge port D provided in the tape container 15 so as to be openable and closable is normally closed by the magnet 15g. Hold and
The top tape 10a is densely packed in the tape storage container 15 and the elasticity of the top tape 10a is increased, so that the lid member 15e is opened against the attractive force of the magnet 15g. Thereby, the top tape 10a in the tape storage container 15 can be reliably discharged by a very simple mechanism. According to the present invention, the lid member for opening and closing the discharge opening provided in the tape storage container is held closed in a normal state, and the top tape is concentrated in the tape storage container. Since the lid closing means for opening the top tape by increasing the resilience of the top tape is provided, the top tape can be reliably discharged by a simple mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electronic component mounting apparatus to which a tape feeder according to an embodiment of the present invention is mounted. FIG. 2 is a side view of the tape feeder according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of a mechanism of a tape feeder according to an embodiment of the present invention. FIG. 4 is an explanatory diagram of an operation of a top tape feeding mechanism of the tape feeder according to an embodiment of the present invention. FIG. 6 is a sectional view of a tape storage container of the tape feeder according to the embodiment of the present invention. FIG. 7 is a tape of the tape feeder according to the embodiment of the present invention. Explanation of operation of tape storage operation in storage container [Explanation of symbols] 1 Electronic component mounting device 6 Feeder base 8 Tape feeder 9 Supply reel 10 Tape 10a Top tape 11 Sprocket 12 Tape feed Mechanism 14 Top tape feed mechanism 15 Tape storage container 15b First inclined surface 15c Arc-shaped curved surface 15d Second inclined surface 15g Magnet 17 Transfer head 30 Motor 32 Transmission gear members 33, 34 Rotation feed members 33b, 34b Groove portions 41, 42 Claw Member A Introduction port B Introduction part C Storage part D Discharge port

   ──────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hidehiro Sabo             1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric             Within Sangyo Co., Ltd. F-term (reference) 5E313 AA15 DD01 DD02 DD35

Claims (1)

What is claimed is: 1. A tape feeder for feeding an electronic component to a pickup position of an electronic component mounting apparatus by pitch-feeding a tape holding the electronic component, wherein the electronic component is placed on the upper surface of the tape. A top tape feeding means for feeding the top tape, which is covered and attached and peeled off from the upper surface of the tape just before the pickup position, in a direction opposite to the tape feeding direction, and the top tape sent by the top tape feeding means A tape storage container having a discharge port for discharging the top tape at the end opposite to the introduction port, a lid member provided in the tape storage container for closing the discharge port, and a normal time In this case, the lid member is held in a closed state, and the top tape is densely packed in the tape container, so that the elasticity of the top tape is increased. Therefore, a tape feeder comprising: lid closing means for opening the lid member.