JPS61244418A - Moving and positioning mechanism for substrate in parts mounting device - Google Patents

Abstract

PURPOSE:To sufficiently display a rotating function in a rotary table, by providing driving rails, for positioning a printed substrate, on the rotary table while cutting off said driving rails in the position of a distance equal to the radius of the rotary table, in the case of a captioned mechanism. CONSTITUTION:A supporting bed 3 is provided on the base of a parts mounting device. The device provides on said supporting bed 3 track rails 37, 38, for holding a substrate 36 in its both sides to be driven and fed further positioning the substrate, on rotary tables 18, 19 loading the substrate 36 to be held. The device, providing a driving means in said supporting bed 3, rotatably supports each rotary table 18, 19 by rollers 22, 23. Further the track rails 37, 38 are cut off in cutoff parts 37a, 38a positioned in a distance equal to the radius of the rotary table from the rotary axis of the rotary tables 18, 19. Accordingly, the device, even when it provides the plural rotary tables 18, 19, prevents the track rails 37, 38 on the mutually neighboring rotary tables 18, 19 from being adapted to each other in accordance with rotation of each rotary table 18, 19.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a substrate movement and positioning mechanism in a component mounting device.

BACKGROUND ART In recent years, component mounting apparatuses have been developed and used to mount various types of components such as electronic components onto printed circuit boards under automatic control.

A component mounting device basically includes a component supplying means for supplying components, and a component gripping and moving means for gripping the components supplied by the component supplying means, moving them in a predetermined direction, and attaching them to a printed circuit board to be worked on. have. As one form of a component mounting device that has already been developed, the component gripping and moving means is fixed to the base of the device, and the printed circuit board is moved to a component mounting position by the component gripping and moving means.

Some devices are equipped with a substrate movement and positioning mechanism. Specifically, the board moving and positioning mechanism includes a support base that supports a printed circuit board and is movable in two directions perpendicular to each other and perpendicular to the component movement direction by the component gripping and moving means, and a support base that drives the support base. It has a drive means for. In other words, the printed circuit board is given planar coordinates in the direction in which the component is moved by the component gripping and moving means.

By using a component mounting device with such a configuration, the efficiency and accuracy of component mounting can be dramatically improved compared to when components are mounted manually. However, since this component mounting device only moves the support stand in two directions, it is not possible to change the mounting angle of the component with respect to the direction in which the printed circuit board is transported. Therefore, a component mounting device has been developed in which a rotary table is provided on the support base and is rotatable around a rotation axis extending in the direction in which the component is moved by the component gripping and moving means, and the substrate is supported on the rotary table. There is. By providing this rotary table, it is possible to arbitrarily set the mounting angle of the component with respect to the transport direction of the support base, such as by making the orientation of the component exactly opposite. Conventionally, when carrying in and out of the rotary table a printed circuit board in a component mounting device with such a configuration, this has been done manually by an operator or by an extremely expensive so-called robot arm, which increases the cost of the entire production line. However, it has not always been easy to improve work efficiency.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a substrate movement and positioning mechanism that makes it possible to reduce costs and improve work efficiency throughout the production line. That's true.

In the substrate moving and positioning mechanism according to the present invention, a pair of parallel drive rails are provided on a rotary table that supports a substrate as a work target for holding, transporting, and positioning the substrate on both sides of the substrate. The track rail is cut at a distance equal to the radius of the rotary table from the rotation axis of the rotary table.

Support-LJL Hereinafter, a component mounting device equipped with a board moving and positioning mechanism as an embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates the entire component mounting device.

As shown in FIG. 1, a support stand 3 formed in the shape of a rectangular plate is provided on a base 2 of the component mounting device. The support stand 3 is attached to the upper surface of the base 2 via rail members 4 and 5 extending in the front-rear direction and left-right direction, respectively, and is movable along the respective rails. However, in the figure, the direction of the arrow Y is the front, and the direction of the arrow X is the left. Further, arrow Z indicates upward. Although not shown, a driving means for driving the support stand 3 is provided.

It is. A bracket portion 6 is provided at the rear of the upper surface of the base 2, and a pair of component rolls 7 and 8 serving as component supply means are rotatably provided on the bracket portion. A large number of electronic components 10 and 11 having lead wires at both ends and held by a holding tape at the tip of the lead wire are wound around each component roll 7.8 together with the holding tape. .

The front part of the bracket part 6 holds the first component among the plurality of electronic components sequentially supplied from the rolls 7 and 8 of each component, and moves it in a predetermined direction, in this case downward, onto a printed circuit board (described later). Parts gripping and moving means 12 and 13 to be attached are provided. Specifically, the component gripping and moving means 12 and 13 detach the electronic component whose lead wire tip is held by the holding tape from the holding tape by cutting the vicinity of the lead wire tip, and at the same time. The lead wire of the component body is bent and formed, and then the bent end of the lead wire is inserted into the lead wire hole of the printed circuit board. Note that the component gripping and moving means has already been proposed by the present applicant in Utility Application No. 59-082790, for example, and will not be described in detail here. Also, base 2
Inside there is a support stand 3 along with a component gripping and moving means 12.13.
Clinch mechanisms 15 and 16 are provided at positions that sandwich the two. The clinch mechanisms 15 and 16 are for bending (clinching) the tip of the lead wire of the electronic component that has passed through the lead wire insertion hole of the printed circuit board. The clinch mechanism has already been proposed by the present applicant, for example, in Japanese Utility Model Application No. 59-237380.

As shown in FIGS. 2 and 3, two disc-shaped rotary tables 18 and 19 are arranged side by side on the support base 3 in the left-right direction (in the direction of the arrow X and in the opposite direction). ing. However, the rotary tables 18, 19 are not shown in FIG. Each rotary table 18, 19 is rotatably supported by two types of rollers 22 and 23 arranged along the outer periphery of each rotary table and engaged with the outer periphery. Each rotary table 18, 19 is rotatable about a rotation axis extending in the direction in which the component is moved by the above-mentioned component gripping and moving means, that is, in the vertical direction.

Of the plurality of rollers 522 and 23 provided, one pair of rollers 22 engaged with each front edge of the rotary table 18 and 19 is a reference row and is provided at the front end of the support base 3. It is something that was given. A large double-sided beam member 24 as a pivot extending in the left-right direction (in the direction of arrow The front end portion of the support base 3 is a so-called base portion having high rigidity. By providing the O-roller 22 as a reference roller on the highly rigid base portion, the positioning accuracy of the rotary tables 18 and 19 is increased.

As shown in FIG.
6 is placed. This roller 26, 62 rows 522 including reference rollers positioned so as to be sandwiched between the rotary tables 18 and 19, and the outer periphery of each rotary table are provided with a base member for rotating each rotary table. A wire 27 is installed. In other words, the roller 26 and the two rollers 22 sandwiched between the rotary tables 18 and 19 act as guide rollers for guiding the wire 27. By arranging the guide rollers as described above, the lateral pressure applied to each rotary table is, 19 due to the tension of the wire 27 is
It is applied toward the base portion (the front end of the support base 3) described above.

An air cylinder 29' extending in the left-right direction is also provided at the front edge of the support base 3. Also, air cylinder 2
A guide shaft 30 is provided to the right of 9 and extends parallel to the air cylinder.

A slider 31 is slidably fitted into the guide shaft 30, and the tip of the O-rad 29a of the air cylinder 29 is connected to the slider 31.

Both ends of the wire 27 are connected to this slider 31. In addition, the air cylinder 29 and the guide shaft 30
is attached to a plate-shaped bracket 3a fixed to the support base 3, and a stopper 32 and a shock absorber 33 are fixed to the bracket so as to come into contact with the slider 31. The above-mentioned air cylinder 29, guide shaft 30, slider 31, stopper 32, shock absorber 33, and related peripheral small members constitute a driving force applying means for applying a driving force to the wire 27. has been done. Further, the driving force applying means, each of the rollers 22, 23, 26, and the wire 27 as a raw member constitute a driving means for driving each rotary table 18, 19.

As shown in FIG.
A printed circuit board 36 is printed on top.

A pair of parallel track rails 37 and 38 are provided for holding, transporting and positioning the board on either side. Each track rail 37.38 has a cutout 3.7a, 38a.
is provided. Each track rail 37, 38 is cut from the rotating wheel of each rotary table 18, 19 at a distance equal to the radius of the respective rotary table.

Of the pair of track rails 37 and 38, at least one track rail is movable in the direction toward and away from the other track rail, and the rail spacing can be adjusted. Therefore, parts can be attached to many types of printed circuit boards having different dimensions.

The pair of track rails 37, 38, the driving means including the air cylinder 29, the wire 27, etc., the rotary tables 18, 19, and the support base 3 move the printed circuit board 36 to the component gripping and moving means 12. A board moving and positioning mechanism is configured to move and position the board to the component mounting position by 13.

As shown in FIG.
Two positioning blocks 41 are fixed near the outer periphery of the lower surface of the rotary table at a distance of 90'' in terms of the rotation angle of each rotary table.The details of the positioning blocks 41 are shown in FIG. On the other hand, two small air cylinders 42 are disposed at the rear end of the support base 3.

As is particularly clear from FIG. 5, a tapered portion 42b is formed at the tip of the rod 42a of the air cylinder 42, and a tapered portion 42b is formed on the main surface of the positioning block 41.
The tapered hole 42b is configured to be able to engage with the tapered hole 42b. However, the tapered hole 41a of the positioning block 41 and the rod 42a of the air cylinder 42 are connected to each rotary table 18.
．． 19. Therefore, when the printed circuit board 36 carried on the multi-rotary table reaches a predetermined rotational angle position, that is, a component mounting angle position, it is made to face each other. That is, the air cylinder 42 acts as a pressing means for pressing each rotary table 18, 19 through the rod 42a as a movable locating pin and via the positioning block 41. Note that, as is clear from the above-described configuration, each of the rotary tables 18 and 19 is pressed by the air cylinder 42 toward the roller 22, which is a reference roller.

As shown in FIGS. 2 and 5, the air cylinder 42
A photosensor 43 is arranged on the side of the
It is fixed to the support stand 3.

Further, a detected member 44, a portion 44a of which can be inserted into the detection gap of the photosensor 43, is swingably attached to the positioning block 41 via a pin 44b. The photosensor 43 and the detected member 44 constitute a detection means for detecting that each rotary table 18, 19 has reached the aforementioned predetermined rotation angle position. This sensing means is included in the drive means (described above) for driving the rotary table 18,19.

As shown in FIGS. 4 and 5, a part of the detected member 44 is formed in the tapered hole 1 formed in the positioning block
It is exposed within a. That is, the rod 428 serving as a movable locating pin engages with the detected member 41 and causes the detected member to be separated from the detection position by the 7-point sensor 43. Note that a coil spring 45 is provided within the positioning block 41 to apply a bias spacing to the detected member 41.

As shown in FIG. 2, a total of four shafts 47 are attached to predetermined positions of each track rail 37 and 38 and extend parallel to each track rail, and each shaft is centered at its axial center. It can be rotated as Claw members 48 that can be engaged with positioning holes (not shown) formed in the printed circuit board 36 are attached to both ends of each shaft 47. Further, a small air cylinder 49 for rotating the shaft 47 to attach/detach the claw member 48 to/from the printed circuit board 36, and four photosensors 50 for detecting the attachment/detachment are provided.

As shown in FIG. 2, four limit switches 54, 55, 56, and 57 are provided on the outside of the air cylinder 29 to detect the operating position of the rod 29a of the air cylinder.

These photosensors 43.50 and limit switches 5
The detection signals emitted from base 2 (first
control unit (not shown) provided at a predetermined position within the
The support base 3 and the rotary table 18.1 are transmitted to the support base 3 and the rotary table 18.1 by operation signals sent from the control unit in response to the respective detection signals.
9 etc. operate at the timings described later.

As shown in FIG. 1, on both left and right sides of the base 2, there is a board that can store a large number of printed circuit boards 36 as work objects stacked at predetermined intervals in the vertical direction (direction of arrow Z and the opposite direction). A storage magazine 59 is arranged. The board storage magazine 59 located on the left side of the base 2 (on the side in the direction of arrow X) is for storing the printed circuit board 36 before electronic components 10 and 11 are attached. The arranged board storage magazine 59 is for storing the printed circuit board 36 to which electronic components have been attached. Each board storage magazine 59 is formed in the shape of a rectangular parallelepiped with its left and right sides (in FIG.
A number of short track rails (not shown) which can be continuous with the track rails 37 and 38 (see FIG. 2) and which hold the printed circuit board 36 are provided on the surface facing the inner wall in the direction and the opposite direction).
extend in the left-right direction and are formed at regular intervals in the vertical direction. Each printed circuit board 36 is held on both sides by the short track rails.

Each board storage magazine 59 is placed on a movable support plate 60 that is moved up and down by an elevator mechanism (not shown), and each board storage magazine 59 has a component mounting speed determined by the above-mentioned storage interval of each printed circuit board 36. It can be moved up and down at predetermined timing depending on the situation. The unidirectional movement of the printed circuit board 36 between the short track rails and the track rails 37, 38 of each board storage magazine 59 is performed by a simple board moving means such as an air cylinder.

Next, the operation of the component mounting position of the above-described structure will be briefly explained with reference to FIGS. 6 and 7.

When a command signal is issued to install the electronic components,
Two printed circuit boards 36 are carried onto each rotary table 18.19 by track rails 37.38 from the board storage magazine 59 on the upstream side (left side of the base 2) shown in FIG. Then, the air cylinder 49 operates and the claw member 4
8, the printed circuit board 36 is positioned. When it is confirmed that each of the seven sensors 50 is turned on and the printed circuit board 36 is positioned on the track rail 37.38, the electronic components 10.11 are attached. The rod 42a of the air cylinder 42 is then pulled, thus
As shown in FIG. 5, the seventh sensor 43 is turned on. As a result, the rod 29a of the air cylinder 29 is pulled, and each rotary table 18, 19 is rotated 90 degrees counterclockwise in FIG. In addition, each rotary table 1
The photo sensor 43 is turned off by the rotation of 8°19. Here, when the rod 29a of the air cylinder 29 is pulled by a predetermined amount, the limit switch 55 is turned on, and thereby the deceleration solenoid valve installed in the compressed air supply path to the air cylinder 29 is operated, and the rod 29a is pulled by a predetermined amount. The retraction speed of 29a is reduced. When the rod 29a is completely pulled by that stroke, the limit switch 54 is turned on, and at the same time, the photosensor 43 is turned on as shown in the fifth figure. Therefore, the rod 42a of the air cylinder 42 protrudes, and each rotary table 18, 19 is supported at three points by the rod and the roller 22. As the rod 42a protrudes, the photosensor 43 is turned off, as shown in FIG. When it is confirmed that the photosensor 43 is turned off, the electronic components 10.11 are attached. Next, the rod 42a of the air cylinder 42 is pulled and the photosensor 43 is turned on. Therefore, the rod 29a of the air cylinder 29 protrudes and each rotating table 18.degree. 19 rotates 90' clockwise in FIG.

Note that this rotation of each rotary table 18, 19 turns off the photosensor 43. Further, when the limit switch 56 is turned on, the protrusion speed of the rod 29a is reduced, and when the protrusion of the rod 29a is completed, the limit switch 56
7 is turned on.

A rod 29a protrudes and therefore each rotary table 18.1
When the rotation of 9 is completed, the state shown in FIG. 5 is reached and the photosensor 43 is turned on. Therefore, the rod 4 of the air cylinder 42
2a protrudes, and each rotary table 18, 19 is supported at three points by the rod 42a and roller 22. When the rod 42a protrudes, the photosensor 43 is turned off (see FIG. 7). When it is confirmed that the photosensor 43 is turned off, the air cylinder 49 returns to its original position, and the positioning of the printed circuit board 36 by the claw members 48 is released. Thereafter, the printed circuit board 36 with the parts attached thereto is carried out from the rotary table 18.19 and stored in the circuit board storage magazine 59 on the downstream side (to the right of the base 2) shown in FIG.

Thereafter, the above operation is repeated for each printed circuit board.

QUA Day 1 As detailed above, in the substrate moving and positioning mechanism according to the present invention, the substrate (36) as a work target is held on both sides of the rotary table (18, 19) which carries the substrate. A pair of parallel track rails (37°38) are provided for transporting and positioning the track rails.Therefore, for example, a large number of short track rails that can be continuous with the track rails are provided on the inner wall facing surface. In addition, board storage magazines (five) for storing and holding a large number of boards stacked at predetermined intervals (for example, in the vertical direction) by the short track rail are arranged on the upstream and downstream sides of the track rail, and Attachment of components to the board storage magazine by the stacking interval of each board is carried out using an elevator mechanism that moves the board storage magazine in the board stacking direction (vertical direction) at a predetermined timing depending on the speed, and a part of the board between the track rail and the short track rail. By providing a simple substrate moving means such as an air cylinder for directional movement, it is possible to automatically carry the substrates into and out of the rotary table. This makes it possible to improve the working speed, and therefore the working efficiency of the entire production line, compared to the case where it is not done.

Further, the elevator mechanism and substrate moving means (air cylinder, etc.) are simple and inexpensive in construction, and the program for driving them is also simple, making it easy to reduce costs.

Furthermore, in the substrate movement and positioning mechanism according to the present invention,
The track rail (37, 38) is connected to the rotary table (18,
19) is cut at a position equal to the radius of the rotary table from the rotation axis. Therefore, even when a plurality of rotary tables are provided, the track rails on adjacent rotary tables do not collide with each other as each rotary table rotates, and each rotary table can fully perform its rotational function. Therefore, in combination with the provision of a plurality of rotary tables, it is possible to further increase work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the entire component mounting device according to the present invention, FIGS. 2 and 3 are a plan view and a front view of a support base and each member supported on the support base, and FIGS. FIG. 5 is a partially detailed view of the component mounting device, and FIGS. 6 and 7 are diagrams for explaining the operation of the component mounting device. Explanation of symbols of main parts 3...Support stand 7.8...Parts roll 10.11...Electronic parts 12.13...Parts gripping and moving means 18.19・
...Rotary table 22.23.26 ...Roller 27 ...Wire 29.42.49 ...Air cylinder 36 ...
···Printed board

Claims (2)

[Claims] (1) Moving and positioning the board to a component mounting position in a component mounting device including a component supply means for supplying a component and a component gripping and moving means for gripping the supplied component and moving it in a predetermined direction to attach it to the board. A substrate moving and positioning mechanism, comprising: a support stand movable within a predetermined plane; and a rotary table rotatably provided on the support stand to be rotatable about a rotation axis extending in the predetermined direction and supporting the substrate; a driving means for driving the support base and a rotary table, and a pair of parallel track rails are provided on the rotary table for holding, transporting, and positioning the substrate on both sides of the substrate. . A substrate moving and positioning mechanism, wherein the track rail is cut at a distance from the rotating shaft equal to the radius of the rotating table. (2) The substrate moving and positioning mechanism according to claim 1, wherein the track rail has an adjustable rail interval.