JPS60228348A - Tape feeder - Google Patents

Abstract

PURPOSE:To supply chip parts smoothly and stably by reducing return speed of a driving shaft by means of an air damper to prevent chips parts such as very small electronic parts from springing out and rising at the time of feeding tape of fixed size. CONSTITUTION:When a driving portion 31a of an air cylinder 31 is lowered, a driving shaft 27 is moved in direction of an arrow B, so that a ratchet click 9 slides on a ratchet gear 6 for one tooth. Subsequently, when the driving portion 31a rises, the driving shaft 27 is returned to its initial state, so that the ratchet click 9 forces the ratchet gear 6 to rotate counter-clockwise for one tooth to move a tape 5 in direction of an arrow A by a fixed length. The top tape 15 is separated from the tape 5 for the travel. In this case, the return speed of the driving shaft 27 is reduced by an air damper 33 to slowly move the tape 5 in direction of the arrow A by a fixed length, so that very small parts 14 are prevented from springing out or rising up.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a tape feeder that is detachably mounted on an electronic component mounting machine.

[Background technology]

The tape feeder moves a tape containing a large number of chip components such as microelectronic components to be mounted on a printed circuit board, etc. in each storage recess intermittently at predetermined intervals, and places the tape in the storage recess at an appropriate position. The top tape covering the top tape is peeled off and the minute electronic components are fed one by one to an electronic component mounting machine. By the way, conventional tape soi 3-
The tape was equipped with only a tape feed gear and a ratchet gear fixed to the tape feed mechanism, and this tape feed mechanism also served as a discharge mechanism for the tape (empty tape) that had already been supplied with microelectronic components. . However, with this mechanism alone, there was a problem that the tape would get caught in the middle, making it impossible to output the tape. In addition, this tape feeder transfers the tape intermittently by the intermittent rotation of the ratchet gear, and peels off the top tape at a predetermined position to expose minute electronic components. There is also the problem that the supply of microelectronic components cannot be carried out smoothly because the microelectronic components jump out or stand up from the housing recesses of the tape.

[Purpose of the invention]

An object of the present invention is to provide a tape feeder that can smoothly discharge empty tapes and can also feed minute electronic components simultaneously.

[Disclosure of the invention]

In order to achieve the above object, the tape feeder of the present invention includes a tape feed gear that feeds the tape by its own rotation by engaging teeth on the outer periphery with feed holes provided on the side edge of the tape, and a tape feed gear that feeds the tape by its own rotation. gear? - a drive shaft which is provided with the attached ratchet gear and is movable forward and backward, and which moves the ratchet pawl by one tooth by advancing and rotates the ratchet gear by one tooth by the ratchet pawl which has moved by one tooth by retreating; A drive means for biasing the drive shaft to move forward appropriately; a return spring for always biasing the drive shirt 1 to retreat; a slow movement means for slowing down the regression speed of the drive shaft; It is configured to include a tape ejection means for ejecting the tape that has passed through the tape feed gear to the outside.

Next, the present invention will be explained in detail based on examples.

FIG. 1 shows an embodiment of the invention. In the figure, reference numeral 1 denotes a substrate used in an upright state, and a disk-shaped tape feed gear 3 is rotatably attached to a shaft 2 at one end of the substrate. This disc-shaped tape feed gear 3 has feed teeth 4 at predetermined intervals on its outer periphery, and these feed teeth 4 are formed on the side edge of the tape 5 at predetermined intervals along the longitudinal direction. It is fitted into the feed hole 5b (see Figure 2). 6 is a ratchet gear integrated with the feed dog 4 by a screw 7, 8 is a drive arm fixed to the ratchet gear 6, and 9 is a ratchet pawl provided on the drive arm J88. Reference numeral 10 denotes a reversal prevention pawl, which functions to prevent the ratchet gear 6 from reversing when the ratchet pawl 9 slides on the teeth of the ratchet gear 6. Reference numeral 11 denotes a guide whose upper portion is formed on a guide stand 12 and along which the tape 5 is moved. This tape 5, as shown in FIG. It is set so that the feed gear 4 of the feed gear 3 can mesh with a feed hole 5b provided on the side edge of the feed gear. 1
Reference numeral 9 designates a cover plate whose cover plate portion 20 exhibits an effect of preventing the tape 5 from lifting and curling, and whose peeling plate portion 21 exhibits an effect of peeling the top tape 15 from the tape 5. That is, the cover plate body 19, as shown in FIG.
The mounting plate part 22 is provided so as to be able to rotate vertically about a shaft 23 within the interval formed between the guide 11 and the substrate l, and the cover plate part 20 is attached to the guide base part 12. of"
It is located on the second side and prevents the tape 5a shown by the dashed line from lifting up. Then, the peeling plate section 21 reversely peels off the top tape 15 shown by the two-dot chain line from the tape 5 to expose the microelectronic component 14 housed in the housing recess 13 of the tape. The exposed microelectronic components 14 are sucked by a suction nozzle 25 shown by a chain line in a suction space 24 between the cover plate part 20 and the peeling plate part 21, and are placed on a printed circuit board etc. by moving the suction nozzle 25 and releasing the suction. be done. Reference numeral 26 denotes a tension spring that tensions and biases the cover plate 19 in the direction of the guide base portion 12. Reference numeral 27 denotes a drive shaft, which is supported by a shaft pedestal 28 fixed to the base plate 1 so as to be movable left and right. The drive shaft 27 has one end pivoted to the drive arm 8 and the other end pivoted to the drive arm 29a of the one-way Clara chip 29 fixed to the substrate l. A drive lever 30 is rotatably attached to the mounting shaft 1a of the substrate 1, and drives the drive seat 27 in the direction of arrow B by lowering the drive portion 31a of the air cylinder 31. 32 is the driving seat 27's i summer gu i'! &; I, 33 is an air damper whose cylinder 33a is connected to the drive shaft 27 via the connecting arm 34. 35 is the flow I of the air damper 33.
The valve is regulated by N1m, and the retraction speed of the drive shaft 27 can be adjusted appropriately by the degree of twisting of the knob 3G. 37 is a presser plate that presses the blank tape 5 H1 after the microelectronic component 14 has been taken out, and 3) (its spring) holds the electronic component 14 therein; A holding plate 41 presses the tape 5 against the guide 1-ra 40, and 41 is its spring. 42 is a one-piece tape reel, and a supporting plate 43 and a substrate are provided at a constant interval with respect to the substrate 1. 1, and is rotatably supported by having its rotating shaft 44 loosely fitted into a two-part open elongated hole 42a provided in the substrate l and the support plate 43. This is a rubber roller that constantly urges the top tape reel 42 to rotate in the direction of the arrow.

The state in which this cape feeder is mounted on the electronic component mounting machine 46 is shown in FIGS. 4 and 5. That is, the electronic component storage tape 5 is supplied to the tape feeder from an electronic component storage tape reel 47 that is removably attached to the electronic component mounting machine 46, and a rubber roller 45 that biases the top tape reel 42 to rotate. and driving shirt I.27
The electronic component mounting machine 46 is equipped with an air cylinder 31 for driving the electronic components and a suction nozzle 25 for sucking the nW electronic components. 48 is a printed circuit board on which electronic components are arranged, and 49 is a control section for programming the operation control of the suction nozzle 25. The electronic component mounting machine 46 is detachably equipped with several tape feeders each accommodating different types of microelectronic components as a set.

In this configuration, when the drive portion 31a of the air cylinder 31 is lowered, the drive lever 30 changes from the state shown in FIG.
By rotating around a, the drive shaft Z7 is moved in the direction of the arrow 13 against the spring force of the return spring 32. This movement of the drive shaft 27 causes the drive arm 8 to rotate clockwise about the shaft 2, and its ratchet pawl 9 slides over the teeth of the ratchet gear 6 by one tooth. At this time, the drive arm 29a of the one-way clutch 29 simultaneously
- Due to the above movement of the foot 27, it rotates counterclockwise and assumes a preparation posture for feeding the empty tape 5a in the direction of arrow E. When the drive portion 31a of the air cylinder 31 rises from this state, the drive shaft 27 returns to its initial state due to the spring force of the return spring 32. As the drive shaft 27 returns, the drive arm B rotates counterclockwise in the δ4 direction about the shaft 2, and the ratchet pawl 9 rotates the ratchet I/gear 6 counterclockwise by one tooth. Due to this rotation, the tape feed gear 3 integrated with the ratchet gear 6 rotates counterclockwise by one tooth of the ratchet gear 6, and the tape 5 containing the microelectronic component 14 is moved in the direction of arrow A and H. Move by a fixed dimension. In this case, the top tape 15 is electrically tensilely biased in the direction of arrow F as shown in FIG. By moving by a fixed distance, the tape 5 is peeled off by the amount of movement. As a result, the minute electronic component 14 housed in the tape 5 is exposed in the suction space 24. In particular, in this device, since the return speed of the drive shaft 27 is slowed down by the air damper 33, the tape 5 is also moved by a fixed distance in the direction of the arrow A slowly. Therefore, the microelectronic component 14 is prevented from popping out or standing up, and a stable posture is maintained. In this way, ゛ζ suction space 2
The microelectronic component 14 exposed in the suction nozzle 2
5, and is placed at a predetermined position on the printed circuit board 48. The return of the drive shaft 27 simultaneously rotates the drive arm 29a of the one-way clutch 29 clockwise, thereby sending the empty tape 5a in the direction of arrow E and ejecting it to the outside. By repeating the above operations, the tape 5 is intermittently fed, and the microelectronic component 1
4 is supplied at predetermined time intervals, and empty tape 5a is intermittently discharged to the outside.

〔Effect of the invention〕

Since the tape tweeter of the present invention is constructed as described below, the tape is slowly fed by a fixed distance. As a result, chip parts such as microelectronic parts are prevented from popping out or standing up during fixed-dimension feeding, and chip parts can be supplied in a circular and stable manner. Further, since this tape feeder is equipped with a tape ejecting means, it has an excellent effect of being able to smoothly and completely eject the empty tape.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the tape used therein, Fig. 3 is an enlarged perspective view of the main part of Fig. 1, and Fig. 4 shows the installation of Fig. 1. FIG. 5 is a perspective view of the electronic component mounting machine, and FIG. 5 is a side sectional view thereof. 3... Tape feed gear 5... Tape 6... Ratchet gear 8... Drive arm 9... Ratchet pawl 15... Top tape 27... Drive shaft 29... One-way clutch 30. ... Drive lever 31 ... Air cylinder 32 ... Return spring 3
3...Representative of Air Danno, Patent Attorney Takehiko Matsumoto" Minuma Ni Neichi Masho (Spontaneous)) 1 Died June 15, 1159 Commissioner of the Japan Patent Office 1, Indication of Case 1984 Patent Application No. 084462 No. 2, Name of the invention Tape feeder 3, Relationship with the case of the person making the amendment Patent applicant's office Address: 1048 Kadoma, Kadoma City, Osaka Prefecture Name (5)
83) Matsushita Electric Works Co., Ltd. Representative Representative Director Iku Kobayashi 4, Agent 6, Specification subject to amendment and drawings 7, Supplemental contents + 11 From page 5, line 1 to line 2 of the same page of the specification The phrase "fixed to the ratchet gear 6" should be corrected to "swing around the shaft 2." (2) On page 7, line 2 of the specification, it says “Cylinder 1”.
"Piston," he corrected. (3) In the accompanying drawings, Figure 1 will be corrected as shown in the attached sheet.

Claims (3)

[Claims] (1) A tape feed gear that feeds the tape by its own rotation by engaging teeth on the outer edge with feed holes provided on the side edge of the tape, and a ratchet gear attached to this tape feed gear that moves forward and backward. A drive shaft that is freely provided and rotates the ratchet gear by one tooth with the ratchet pawl that moves by one tooth when advancing and moves one tooth when retracted, and a drive means that urges the drive shaft to advance appropriately. a return spring that urges the drive shaft to retract at the time; and a slowing means that slows down the retraction speed of the drive shaft;
- A tape feeder, characterized in that it is equipped with a tape ejecting means that works in conjunction with the drive shaft described in F and ejects the tape that has passed through the tape feeding gear to the outside. (2) Claim 1 in which the slow movement means is an air damper
Tape feeder as described in section. (3) The tape feeder according to claim 1 or 2, wherein the tape ejection means is a one-way clutch.