CN112514549B

CN112514549B - Belt feeder

Info

Publication number: CN112514549B
Application number: CN201880096182.3A
Authority: CN
Inventors: 石桥久雄; 清水利津; 山崎祐辅
Original assignee: Fuji Corp
Current assignee: Fuji Corp
Priority date: 2018-08-02
Filing date: 2018-08-02
Publication date: 2022-11-22
Anticipated expiration: 2038-08-02
Also published as: CN112514549A; WO2020026423A1; JP7123145B2; JPWO2020026423A1

Abstract

The tape feeder is suitable for a component tape with two cut ends, and comprises: a feeder main body having a predetermined width corresponding to a component tape in which a plurality of components are aligned and stored; a belt feeding mechanism for engaging teeth of a sprocket with a feeding hole formed in the component belt and feeding the component belt by rotation of the sprocket; a tape guide covering the component tape from above on an upper surface portion of the feeder main body, and including a component supply portion from which a part is cut out to take out a component; and an elastic support member for supporting the component tape in accordance with a position of the component supply section.

Description

Belt feeder

Technical Field

The present invention relates to a tape feeder suitable for use in a component tape in which a plurality of components are stored in a row along a longitudinal direction, particularly a so-called dicing tape in which both ends are cut.

Background

A component mounting machine that mounts components on a circuit board uses a component supply device for supplying components. For this component supply device, for example, a tape feeder is used which winds out a component tape containing electronic components from a tape reel and feeds the tape. A conventional example of such a tape feeder is disclosed in patent document 1 below. The tape feeder sequentially feeds the component tape, and holds the component by suction by a suction nozzle at the component supply position, but a magnet having a non-magnetic pole surface on the upper surface side is provided below the component supply position in order to prevent the component from rising or the like. Further, there is disclosed a structure in which the component tape is lightly clamped from above and below by an elastic body together with a pressing cover, whereby meandering of the component tape is prevented and intermittent feeding is stabilized.

Documents of the prior art

Patent document 1: japanese patent laid-open No. 2000-228600

Disclosure of Invention

Problems to be solved by the invention

The tape feeder of the above-described conventional example is formed with a support body having a recess larger than the component housing section of the component tape. That is, even when the suction nozzle abuts against the component at the time of taking out the component, the bottom surface of the component housing portion is bent into the concave portion to release the pressing force. However, the structure of the above conventional example is not sufficient to cope with a so-called dicing tape.

That is, in the case of using a long component tape wound around a reel as in the conventional example, tension acts to maintain a certain degree of stability, but a dicing tape having both ends diced may be used in the tape feeder. Such a dicing tape has poor stability, and the housed components are easily affected by vibration. Therefore, in the support body in which the large concave portion is formed as in the conventional example, even if both sides of the component tape are lightly clamped from above and below, the components in the component housing portion are easily affected by the vibration.

In view of the above, an object of the present invention is to provide a tape feeder suitable for use in a component tape having both ends cut.

Means for solving the problems

A tape feeder according to an aspect of the present invention includes: a feeder main body having a predetermined width corresponding to a component tape in which a plurality of components are aligned and stored; a tape feeding mechanism for engaging teeth of a sprocket with feed holes formed in the component tape and feeding the component tape by rotation of the sprocket; a tape guide covering the component tape from above on an upper surface portion of the feeder main body, and including a component supply portion from which a part is cut out to take out a component; and an elastic support member for supporting the component tape in accordance with a position of the component supply section.

Effects of the invention

According to the above configuration, the sprocket is rotated by the driving of the motor, and thereby the component tape with the teeth engaged in the feed hole is moved along the tape guide, and the component is taken out from the component supply portion. At this time, since the component tape is supported by the elastic support member, the tape feeding is performed in a stable state even if the component tape is a tape whose both ends are cut.

Drawings

Fig. 1 is an external perspective view showing an embodiment of a tape feeder.

Fig. 2 is a side view showing an internal configuration thereof with respect to an embodiment of the tape feeder.

Figure 3 is a top view of the front portion of the feeder body.

Fig. 4 is a side view schematically showing a tape support structure formed in a front portion of the tape feeder according to the first embodiment of the tape feeder.

Fig. 5 isbase:Sub>A sectional view showingbase:Sub>A belt support structure atbase:Sub>A-base:Sub>A viewing portion in fig. 4.

Fig. 6 is a side view schematically showing a tape support structure formed at the front portion of the tape feeder according to the second embodiment of the tape feeder.

Detailed Description

Next, an embodiment of the tape feeder of the present invention will be described below with reference to the drawings. In the present embodiment, a tape feeder for supplying components to a component mounting apparatus will be described as an example, as in the conventional example. Fig. 1 is an external perspective view showing a tape feeder of the present embodiment, and fig. 2 is a side view showing an internal structure of the tape feeder. Tape feeder 1 is provided with a tape feeding mechanism for feeding a component tape to a box-shaped feeder main body 2 having a small width, and a reel holder 3 is provided as a reel holding portion on the rear side thereof.

The reel holder 3 is attached with a swingable arm 301, and the reel 4 is rotatably attached and detached. Further, at the rear of tape feeder 1, handle 5 and operation panel 6 are provided above reel holder 3. Operation panel 6 is provided with various switches, LEDs, and the like, which are connected to control board 45 in feeder main body 2. Therefore, the pitch adjustment of feeding, returning, or feeding of the component tape can be performed by the operation of the operation panel 6.

The component tape handled in the tape feeder 1 accommodates a plurality of electronic components at a constant pitch, for example. The tape feeder 1 is provided with a tape feeding mechanism for feeding the component tape forward of the machine body at a constant pitch. The component tape is fed forward on the upper surface portion of feeder main body 2, and the internal components are taken out at predetermined positions. Fig. 3 is a plan view showing the front of feeder body 2, showing the feeding state of component tape 10.

The component tape 10 has a cover tape 12 bonded to a carrier tape 11. Concave component storage sections 13 are formed at equal intervals in the longitudinal direction of the carrier tape 11, and one component 18 is placed in each of the sections. Then, the cover tape 12 is bonded to the carrier tape 11, whereby the components 18 in the component storage section 13 are sealed. The carrier tape 11 is provided with a feed hole array in which a plurality of feed holes 15 are formed at a constant pitch, in addition to a component array in which the component storage sections 13 are continuous. The cover tape 12 is formed in a width not overlapping with the feeding hole 15.

The component tape 10 is pitch-fed forward as indicated by the arrow by engaging the teeth 311 of the rotating sprocket 31 (see fig. 2) with the feed hole 15. Then, in tape feeder 1, a guide 21 for pitch feeding of component tape 10 is formed on the upper surface portion of feeder main body 2. The guide portion 21 is formed with a gap corresponding to the thickness of the component tape 10 by the tape guide 22 so that the component tape 10 can slide therebetween. The tape guide 22 functions as a lateral deviation and float prevention of the component tape 10.

The tape guide 22 is formed with a notch constituting a turnback portion 23 for peeling the cover tape 12 from the carrier tape 11 and a notch constituting a component supply portion 24 for supplying the component 18. The folded-back portion 23 is used to turn the cover tape 12 to the rear side opposite to the direction of travel of the component tape 10 indicated by the arrow. Further, a pressing portion 25 is formed between the folded portion 23 and the component feeding portion 24 to prevent the carrier tape 11 from being lifted up due to the peeling of the cover tape 12. The component supply portion 24 is a space for allowing the component 18 to be taken out in front of the pressing portion 25.

Further, a notch constituting the feeding portion 26 is formed on the tape guide 22 approximately in the range from the folded-back portion 23 to the component supply portion 24. The teeth 311 of the sprocket 31 are hooked on the feed holes 15 of the component tape 10 passing through the feed portion 26. As shown in fig. 2, sprocket 31 is a part of the tape feed mechanism, and the rotation of drive motor 32 fixed to the rear is transmitted to sprocket 31 pivotally supported at the front of feeder main body 2 via a gear.

The drive motor 32 is a servomotor with an encoder. A first gear 33 is fixed to an output shaft of the drive motor 32, and a second gear 34 is engaged with the first gear 33. The second gear 34 is fixed coaxially with a third gear 35 so as to be integrally rotatable, and a fourth gear 36 is meshed with the third gear 35. The fourth gear 36 meshes with a fifth gear 37 fixed coaxially with the sprocket 31. Thereby, the rotational output of the drive motor 32 is decelerated and transmitted via the

gears

33, 34, 35, 36, and 37, and a predetermined rotation is imparted to the sprocket 31.

On the other hand, a mechanism for peeling off the cover tape 12 is provided behind the drive motor 32. That is, the sixth gear 38 is meshed with the first gear 33 fixed to the output shaft of the drive motor 32, and the rotation thereof is transmitted to the seventh gear 42 via the timing belt 41. A feed roller 43 is engaged with the seventh gear 42, and the cover tape 12 is sandwiched between the feed roller 43 and the engaged feed roller 44. Thereby, the rotational output of the drive motor 32 is transmitted to the pair of

feed rollers

43 and 44 via the

gears

31 and 33, the pulleys, and the timing belt 41. In addition, the cover tape 12 is guided to the

feed rollers

43, 44 via two

conical rollers

39, 40.

In addition to the tape feeding mechanism, a control board 45 is mounted inside feeder main body 2, and a connector 46 formed on the front end surface is connected thereto. The connector 46 is used for receiving a control signal and power supply from the component mounting machine side, and can control the feeding of the component in conjunction with the mounting operation of the mounting head on the component. Feeder main body 2 is also provided with an electromagnetic sensor or the like for detecting the rotational speed and rotational angle of sprocket 31, and is connected to control board 41. Positioning pins 47 are provided on the front end surface of feeder main body 2 so as to protrude from two upper and lower portions of connector 46.

Next, the tape feeder 1 of the present embodiment is configured such that the form of the component tape is suitable not only for the reel tape but also for the dicing tape. Tape feeder 1 uses a component tape (reel tape) wound around reel 4 when a large number of components are mounted. On the other hand, for example, in the case where a small number of component mounting is performed such as several or ten-odd sample substrates, component tapes (dicing tapes) obtained by cutting a corresponding number from a reel tape are used.

Although there is such a difference in the component tape 10, in the case of a reel tape, tension acts due to resistance received from the reel 4 on the rear side when the tape is fed forward by the sprocket 31, and the component tape 10 is relatively stable. On the other hand, the cut tape having both ends cut is unstable in state because both the front and rear ends are free ends. Therefore, for example, when the cut component tape 10 is pitch-fed and the corresponding component 18 is fed to the component supply unit 24, the component 18 in the component housing unit 13 is unstable, and suction errors of the suction nozzle or the like occur.

Thus, the tape feeder 1 of the present embodiment is configured to support the component tape 10 at the position of the component supply section 24. Here, fig. 4 is a side view schematically showing a tape support structure formed in the front portion of the tape feeder 1. In addition, fig. 5 isbase:Sub>A sectional view showingbase:Sub>A belt support structure atbase:Sub>A view portionbase:Sub>A-base:Sub>A of fig. 4. First, sub-plate 51 is attached to feeder main body 2 at the front of tape feeder 1. The sub-plate 51 is a long copper plate provided for the purpose of removing static electricity from the element tape 10.

The sub-plate 51 has a bent shape with a step in the longitudinal direction as shown in the figure, and has one end screw-fastened to the installation table 52 and the other end horizontally extending forward (rightward in fig. 4) so as to form a receiving portion 511 spaced apart from the installation table 52. In the tape feeder 1 of the present embodiment, the component tape 10 is fed so as to slide on the receiving portion 511 of the sub-plate 51. The component tape 10 is supported on the lower side by the sub-plate 51, and on the other hand, the upper side is covered by the tape guide 22. The tape guide 22 has a shape having an upper surface and both side surfaces as shown in fig. 5, and although not shown in the drawings, the urging force of the separate spring member acts downward. Therefore, the component tape 10 is pressed by the tape guide 22 with a light force.

In the present embodiment, an elastic support member 53 is provided between the sub-plate 51 in contact with the component tape 10 and the mounting table 52. In particular, the receiving portion 511 is disposed so as to be supported at two positions corresponding to the respective cutout portions of the folded portion 23 and the component supply portion 24. The receiving portion 511 in the cantilever state is unstable as it is, and is insufficient for suppressing the vibration generated in the element tape 10. Then, the elastic support member 53 supports the receiving portion 511 in such a manner as to have a degree of freedom due to elastic deformation so that the horizontal posture of the receiving portion is maintained to some extent. For the elastic support member 53, for example, a polyurethane sponge or the like having excellent dimensional stability is used.

The elastic support members 53 of the component feeding section 24 provided in two locations serve to suppress vibration of the fed component tape 10 (particularly, assumed to be a dicing tape) to avoid suction errors or the like of the components 18 at the component feeding section 24. Thus, as shown in fig. 5, the tape guide 22 is abutted from above against both end portions of the carrier tape 11 of the component supply section 24, and the receiving section 511 is brought into contact with the lower surface of the component storage section 13. The receiving portion 511 of the sub-plate 51 is slightly varied by the deflection, but is supported by the elastic support member 53 to be stable in the horizontal posture. As a result, the carrier tape 11 is fed in a state in which the movement in the vertical direction is restricted.

In the component supply unit 24, the suction nozzle is lowered in the vertical direction, and the component 18 in the component storage unit 13 is sucked, held, and taken out. At this time, even when the descending position of the nozzle is low or the suction position of the component 18 whose posture is displaced is high, the load of the nozzle pressed downward can be absorbed by the deformation of the elastic support member 53.

Further, the elastic support member 53 provided in the folded portion 23 also regulates the movement of the carrier tape 11 in the vertical direction by the tape guide 22 and the sub-plate 51. In particular, the rear end of the component tape 10 passes through the fold-back portion 23, and thus the cover tape 12 after being peeled off is pulled away from the carrier tape 11. At this time, a large vibration occurs in the carrier tape 11, and the components 18 may fly out of the component storage section 13 even before. In this regard, in the present embodiment, the elastic support members 53 restrict the vibration in the vertical direction that may occur in the carrier tape 11, and the stable state of the components 18 can be maintained.

Then, when a short component tape (dicing tape) 10 is used in the tape feeder 1, the component tape 10 is inserted between the tape guide 22 and the sub-plate 51, and the feed hole 15 is caught by the teeth 311 of the sprocket 31. The component tape 10 is pitch-fed element by rotating the sprocket 31 by a predetermined angle by drive control of the drive motor 32. The components 18 are arranged in the component supply section 24, and the cover tape 12 is peeled from the carrier tape 11 at the fold back section 23, turned over, and fed to the rear side.

At this time, the component storage section 13 of the carrier tape 11 moved to the component supply section 24 is positioned vertically by the tape guide 22 and the sub-plate 51 (receiving section 511) supported by the elastic support member 53, and is stabilized without generating vibration that changes the posture of the component 18. Further, although the cover tape 12 is peeled off at the fold back portion 23, the carrier tape 11 is positioned up and down by the tape guide 22 and the sub-plate 51 (receiving portion 511) supported by the elastic support member 53, and therefore vibration at the time of peeling is suppressed. In particular, even in the case where the cover tape 12 is pulled away from the carrier tape 11, the carrier tape 11 is kept in a stable state.

In the present embodiment, two elastic support members 53 as independent members are provided at two locations corresponding to the respective cutout portions of the folded-back portion 23 and the component supply portion 24, respectively. Therefore, the vibration generated at one location is not easily transmitted to the other location, and the influence of the vibration generated at each of the folded portion 23 and the component supply portion 24 can be suppressed. However, since the effect of suppressing vibration can be obtained by the elastic support member, the elastic support members 53 at two locations, which are independent members, may be configured as one member.

Next, a second embodiment of the tape feeder will be described. Fig. 6 is a side view schematically showing a tape support structure formed in the front portion of the tape feeder. Since the tape feeder 60 of the present embodiment has the same configuration as the tape feeder 1 of the first embodiment, a different point will be described, and description of a common part will be omitted. The tape feeder 60 is formed with a component supply portion 62 on a tape guide 61 where the suction nozzle sucks and holds and takes out the component 18. In the present embodiment, the path up to the component supply section 62 provided at a horizontal position is inclined upward.

The tape guide 61 is formed with a horizontal portion and an inclined portion in accordance with the upper surface shape of the feeder main body, a component supply portion 62 is formed in the horizontal portion, and a folded portion 63 for peeling the cover tape 12 from the carrier tape 11 is formed in the inclined portion. The sub-plate 65 for static electricity removal fixed to the installation table 64 has an inclined portion and a horizontal portion formed in accordance with the shape of the tape guide 61. Further, an elastic support member 53 of urethane sponge is provided between the sub-plate 65 in contact with the component tape 10 and the mounting table 64.

However, in the case of the present embodiment, the elastic support member 53 is provided only at a position corresponding to the element supply portion 62, and is not provided at the folded portion 63. The elastic support members 53 provided in the folded-back portions 23 of embodiment 1 described above are provided to cope with vibrations when the cover tape 12 after being peeled off is pulled away from the carrier tape 11. On the other hand, in the present embodiment, a phenomenon that becomes a problem does not occur due to a difference in structure such that the carrier tape 11 positioned at the folded portion 63 is supported by the inclined portion of the sub-plate 65. However, if necessary, the elastic support member 53 may be provided at a portion corresponding to the folded portion 63 as in the first embodiment.

Thus, according to the present embodiment, since the carrier tape 11 moved to the component supply section 62 is supported by the elastic support member 53, the tape feeding is performed in a stable state so that the posture of the component 18 is not changed. In particular, since the component storage section 13 of the carrier tape 11 is positioned vertically by the tape guide 61 and the sub-plate 65 supported by the elastic support member 53, the vibration that changes the posture of the component 18 does not occur, and the component storage section is stable. Further, although the cover tape 12 is peeled at the fold back portion 63, vibration at the time of peeling is suppressed by the inclined structure, and the carrier tape 11 is kept in a stable state even when the cover tape 12 is pulled away from the carrier tape 11.

While one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the scope of the invention.

For example, in the above-described embodiment, the example in which the elastic support member 53 is made of a urethane sponge has been described, but a coil spring or the like may be used.

Description of the reference numerals

1 folder 8230, a tape feeder 2 folder 8230, a feeder main body 10 folder 8230, a component tape (cut tape) 11 folder 8230, a carrier tape 12 folder 8230, a cover tape 13 folder 8230, a component storage part 15 folder 8230, a feed hole 18 folder 8230, a component 22 folder 8230, a tape guide 23 folder 8230, a retracing part 24 folder 8230, a component supply part 31 folder 8230, a sprocket 32 folder 8230, a drive motor 51 folder 8230, a sub-board 52 folder 8230, a setting table 53 folder 8230and an elastic support member.

Claims

1. A tape feeder comprising:

a feeder main body having a predetermined width corresponding to a component tape in which a plurality of components are aligned and stored;

a belt feeding mechanism for engaging teeth of a sprocket with feed holes formed in the component belt and feeding the component belt by rotation of the sprocket;

a tape guide that covers the component tape from above on an upper surface portion of the feeder main body, includes a component supply portion from which a part is cut out to take out a component, and has a folded-back portion formed to peel off a cover tape constituting the component tape;

a sub-plate which is bent in a longitudinal direction, is fixed to the mounting table in a cantilever state, and has one end fixed to the mounting table and the other end extending forward to be in contact with a lower surface side of the component tape;

the setting table is positioned below the auxiliary plate; and

elastic support members that support the component tape in correspondence with positions of the component supply portion and the folded-back portion, respectively,

is arranged with a space corresponding to the positions of the component supply part and the folding part,

and is provided between the sub-plate and the mounting table in accordance with the position of the component supply section and the position of the folded section, and supports the component tape via the sub-plate.

2. The tape feeder of claim 1,

the elastic support member is an independent member provided corresponding to the position of each of the component supply section and the folded section.

3. The tape feeder of claim 1,

the range in which the component supply portion of the tape guide and the sub plate is located is in a horizontal direction, and the range in which the folded portion of the tape guide and the sub plate is located is inclined so as to rise toward the component supply portion.

4. The tape feeder of claim 2,

5. A tape feeder according to any one of claims 1 to 4, wherein,

the elastic support member is a sponge.