JPH08307092A - Structure of part feeding section of mounting machine - Google Patents

Abstract

PURPOSE: To automatically move a part-feeding tray close to a conveyer in accordance with the change of the intervals of the conveyer by using a simple structure. CONSTITUTION: A mounting machine has such a structure that a printed board 3 is carried by a substrate-carrying conveyor 20, consisting of a movable conveyor 21a and a non-movable conveyor 21b, and the part to be supplied to part-supplying parts 34 and 35 is installed on the printed board 3 by a head unit. The part supplying part 35 is composed of a tray 36, where a large type part such as a QFP, etc., are placed, a tray supporting member 37 which supports the tray 36, and a pair of sliding members 38 which support the tray supporting member 37 in a freely slidable manner, and the tray supporting member 37 is coupled to the conveyor 21a. The tray supporting member 37 and the tray 36 are integrally moved together with the conveyor 21a in association with the movement of the conveyor 21a when the interval of the substrate- carrying conveyor 20 is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting machine configured to mount components on a printed circuit board conveyed by a pair of board conveying conveyors, and more particularly to a conveyor according to the size of the printed circuit board. The present invention relates to a component supply unit structure of a mounter having a width adjustable.

[0002]

2. Description of the Related Art Conventionally, a head unit movable in X and Y directions picks up a component supplied from a component supply unit and conveys it by a substrate conveying conveyor to position it at a predetermined working position. A mounting machine configured to be mounted on a printed circuit board is known. In this type of mounting machine, it is general that the conveyors have a paired structure, and the printed boards are conveyed with the board edges supported by the conveyors arranged in parallel with each other. . Recently, various mounting machines with adjustable conveyor intervals have been proposed, which can cope with the size change of the printed circuit board.

The components are supplied from the mounter to the side of each conveyer, that is, outside the conveyers in the direction orthogonal to the direction of the conveyers, so that the component is supplied by the head unit. It has become. For example, in order to supply small chip parts such as fixed resistors and capacitors, a large number of rows of tape feeders are arranged side by side in the conveying direction of the conveyor, and QFP and PLC are also provided.
When components such as C are to be simply supplied, a tray on which these components are mounted in a matrix is fixedly arranged on the side portion of the conveyor.

[0004]

In the mounting machine described above, the component supply means is generally provided with reference to the maximum width of the conveyor from the viewpoint of preventing collision between the conveyor and the component supply means.

However, as described above, when the trays on which the parts such as QFP are placed are arranged to constitute the parts feeding means, the parts are placed in a matrix form and the parts are fed, so that the maximum of the conveyor is required. If the tray is fixedly installed on the outer side of the large scale, the number of parts that can be arranged in the direction orthogonal to the direction of the conveyor is limited by the movable area of the head unit in this direction, and as a result, it is sufficient. It may not be possible to secure the supply quantity. Therefore, when the printed circuit board is conveyed with the conveyor interval set to be relatively narrow, the operator should re-install the tray near the conveyor to increase the number of parts that can be supplied in each tray. ing.

However, it is extremely complicated to correct the position of the tray each time the conveyor interval is changed, and the tray position is corrected while the change of the conveyor interval is usually automatically controlled by a motor drive or the like. If this is done manually, there is the inconvenience that the conveyor collides with the tray when the conveyor interval is changed before the tray position is corrected. Therefore, it is conceivable to provide a mechanism for moving the tray using a motor as a drive source, and automatically change the tray position according to the change of the conveyor interval, but in this case, the structure of the mounting machine and the control system are It is not always a good idea because it becomes complicated.

The present invention has been made to solve the above problems, and supplies a component of a mounting machine which can automatically move a tray to the side of the conveyor in accordance with a change in the conveyor interval with a simple structure. It is intended to provide a partial structure.

[0008]

According to a first aspect of the present invention, there is provided a component supply structure for a mounting machine, wherein a head unit movably provided above a base is used to transfer the components and mount them on a printed circuit board. In the mounting machine, a pair of conveyors for board conveyance, which are arranged in parallel to each other on the base and extend in the conveyance direction of the printed board, an operation mechanism for relatively approaching and separating each conveyor, and a large number of parts are provided. A tray for supplying parts placed side by side, a tray support member for supporting the tray, a guide member for guiding the tray support member in the moving direction of the conveyor, and the tray support for the conveyor movable by the operating mechanism. And a connecting means for connecting the members.

According to a second aspect of the present invention, there is provided a mounter component supply structure according to the first aspect, wherein the tray support member is detachably connected to the conveyor by the connecting means. The guide member is detachably attached to the base.

[0010]

According to the structure of the component supply unit of the present invention, when the conveyor is moved to adjust the interval between the conveyors, the tray support member is moved integrally with the conveyor while being guided by the guide member. This makes it possible to always arrange the tray near the conveyor. In this structure, if the tray support member is detachably connected to the conveyor and the guide member is detachably attached to the base, the tray support portion and the guide member can be removed as necessary. Then, it becomes possible to install other component supply means on the side portion of the conveyor.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

1 and 2 schematically show the structure of a mounting machine to which the structure of the component supply unit of the present invention is applied. In these figures, a head unit 5 for mounting components is installed above the base 1, and the head unit 5 is mounted in the X-axis direction (left-right direction in FIG. 1) and in the Y-axis direction (X-axis on a horizontal plane). It is supported so as to be movable in the orthogonal direction).

That is, a pair of fixed rails 7 extending in the Y-axis direction and a ball screw shaft 8 rotatably driven by a Y-axis servomotor 9 are arranged on the base 1, and the fixed rails 7 are mounted on the fixed rail 7. A head unit support member 11 is arranged in the head unit, and a nut portion 12 provided on the support member 11 is screwed onto the ball screw shaft 8. A guide member 13 extending in the X-axis direction and a ball screw shaft 14 driven by an X-axis servomotor 15 are arranged on the support member 11, and the head unit 5 can be moved on the guide member 13. A nut portion (not shown) that is held and provided on the head unit 5 is screwed onto the ball screw shaft 14. Then, the ball screw shaft 8 is rotated by the operation of the Y-axis servomotor 9 to move the support member 11 in the Y-axis direction, and the ball screw shaft 14 is rotated by the operation of the X-axis servomotor 15, so that the head unit is rotated. 5 moves in the X-axis direction with respect to the support member 11.

The head unit 5 is provided with a nozzle member 16 for attracting components, and in the illustrated embodiment, two nozzle members 16 are provided. Each nozzle member 16
The head unit 5 can be moved up and down (moved in the Z-axis direction) and rotated about the central axis of the nozzle (R-axis) with respect to the frame of the head unit 5, so that the Z-axis servo motor 17 and the R-axis servo motor 18 can be operated. Has become.

Further, a negative pressure from a negative pressure generating source (not shown) is supplied to each of the nozzle members 16 through a valve member or the like. It acts on the tip of the member to adsorb the component.

On the other hand, below the head unit 5,
A board transfer conveyor 20 and a component supply unit are provided.

As shown in FIG. 3, the board transfer conveyor 20 is a pair of parallel conveyors 2 extending in the X-axis direction.
1a and 21b, and the board edge is provided on each conveyor 21.
The printed circuit board 3 is conveyed while being supported by a and 21b.

In this board transfer conveyor 20, printed circuit boards of different sizes can be transferred by expanding and contracting the distance between the conveyors 21a and 21b, and one (upper side in FIG. 3) conveyor 21a (hereinafter referred to as "conveyor board"). , Movable conveyor) is moved in the Y-axis direction so that the distance between the other conveyor 21b (hereinafter, referred to as a fixed conveyor) is adjusted. That is, a pair of ball screw shafts 24, 25 extending in the Y-axis direction and parallel to each other are rotatably supported on the base 1.
The fixed conveyor 21b uses these ball screw shafts 24, 25.
Of the ball screw shafts 24, which are fixed to one end position (lower end position in FIG. 3) of the above, and are attached to the frame of the movable conveyor 21a.
25 are screwed together. Also, each ball screw shaft 2
The interlocking belt 26 is mounted over 4, 25, and the transmission belt 27 is mounted over the output shaft of the motor 28 fixed to the base 1 and one ball screw shaft 24. The ball screw shafts 24 and 25 are interlocked with each other by the operation of the motor 28 to rotate forward and backward,
The movable conveyor 21a can be moved toward or away from the fixed conveyor 21b.

A drive pulley (not shown) and a plurality of driven pulleys (not shown) are provided on the frames of the conveyors 21a and 21b, and a belt 29 for carrying the substrate is attached to each of these pulleys by a predetermined method. Each conveyor 21a, 21b
A drive shaft 30 extending in the Y-axis direction is inserted into each of the drive pulleys. One end side of the drive shaft 30 is supported by the base 1 via a support base and the other end side is fixed to the base base 1. Is connected to the output shaft of the motor 31.

The drive pulleys and the drive shaft 30 are coupled to each other so as to transmit the rotation of the motor 31, and the rotational force generated by the operation of the motor 31 is passed through the drive shaft 30 and the drive pulleys to the belts 29. Transmitted to belt 29
Are circulated and the printed circuit board 3 is transported. The movable conveyor 2
As for the drive pulley 1a, the drive pulley is spline-coupled to the drive shaft 30 so as to allow relative movement of the drive pulley in the axial direction with respect to the drive shaft 30, whereby the movable conveyor 21a moves as described above. Even when the belt 29 is moved, the belt 29 can be moved circularly.

On the other hand, the component supply section is provided on the side of the substrate transfer conveyor 20 (both upper and lower sides in FIG. 1). In this embodiment, there are mainly a component supply unit 34 for supplying small chip components such as fixed resistors and capacitors, and a component supply unit 35 for supplying large components such as PLCC and QFP. The component supply unit 34 is provided on the fixed conveyer 21 with respect to the substrate conveying conveyer 20.
The component supply unit 35 is disposed on the side of the movable conveyor 21a and on the side of the movable conveyer 21a.

The component supply section 34 has a structure in which multiple rows of tape feeders 34a are arranged in parallel in the X-axis direction. A tape containing chip components at predetermined intervals is wound around each tape feeder 34a in a reel shape.
This tape is led out to a desired take-out position on the board transporting conveyor 20, and is intermittently taken out by a take-out mechanism (not shown) when the head unit 5 takes out parts.

The component supply section 35 has a tray 36 on which large-scale components such as QFP are placed in alignment with each other in the X-axis direction and the Y-axis direction, a tray support member 37 for holding the tray 36, and a tray support member. It is composed of a pair of slide members 38 that slidably support the member 37.

As shown in FIGS. 3 and 4, the slide members 38 are arranged at predetermined intervals in the X-axis direction, and are attached to the base 1 via the support block 33, for example. Each slide member 38 is composed of a fixed portion 38a with respect to the support block 33, an intermediate portion 38b and a tip portion 38c that slide in two steps with respect to the fixed portion 38a, and the entire slide member is in the Y-axis direction. It is attached to the support block 33 so as to expand and contract.

The support block 33 is the conveyor 21.
Each slide member 38 is arranged on the outer side of the movable region of a and is attached to the support block 33 so as not to collide with the conveyor 21a in its contracted state. Although not shown in detail, each slide member 3
8, the fixing portions 38a are integrally coupled to each other via a connecting member or the like, and are configured so that they can be integrally attached / detached to / from the tray support member 37 with respect to the support block 33 by operating a predetermined clamp means. There is.

The tray support member 37 is used for each slide member 3
8 is attached to the tip 38c of the tray 8 to hold the tray 36 on its upper surface. Slide-type fixtures 37a and 37b are provided on the upper surface of the tray support member 37, and these fixtures 37a, 37 are provided with the tray 36 pressed against a predetermined positioning member.
The tray 36 is held by b.

Further, as shown in FIG. 5, the tray supporting member 37 is provided with a locking piece 39 projecting at a position facing the substrate carrying conveyor 20, and the locking piece 39 is provided on the conveyor 21a.
Is engaged with the engaged means 22 provided on the side surface portion of the above, and the locking piece 39 and the engaged means 22 constitute a connecting means. The engaged means 22 is composed of a pair of elastically retractable plungers 22a arranged on the frame of the conveyor 21a so as to face each other in the X-axis direction, and the engaging piece 39 is held by these plungers 22a. It is configured to engage with the locking piece 39. Therefore, the engagement piece 39 can be engaged with and disengaged from the engaged means 22 by applying a force larger than the holding force of each plunger 22a.

Next, the function and effect of the mounting machine will be described.

When the mounting operation by the mounting machine is started, first, the motors 31 are operated to move the conveyors 21a,
Each belt 29 of 21b is circulated, and along with this, the printed circuit board 3 is moved from the substrate supply unit (not shown) along the substrate transporting conveyor 20, and the motor 31 is stopped at a predetermined timing. The printed circuit board 3 is set at a predetermined work position, for example, a position shown by a broken line in FIG.

Then, by driving the X-axis servomotor 15 and the Y-axis servomotor 9, the head unit 5 is moved above the component supply unit 34 or the component supply unit 35, and at the same time, the R-axis servomotors 18 and Z. The nozzle member 16 is lowered by driving the shaft servo motor 17, and desired components are taken out from the component supply units 34 and 35.

At this time, if the component is to be taken out from the component supply unit 34, the nozzle member 16 is arranged at a predetermined take-out position of the tape feeder 34a and the fed chip component is sucked. Further, when the component is taken out from the component supply unit 35, the nozzle member 16 is arranged above the component placed on the tray 36 and the component is sucked.

After that, a predetermined component recognition is performed on the suction component, and when this component recognition is completed, the head unit 5 is moved onto the printed circuit board 3, and the nozzle member 16 that has suctioned the component is lowered to move the printed circuit board. The component is to be mounted at a predetermined mounting position on 3.

By the way, in the above mounting machine, it is possible to mount on printed circuit boards of different sizes as described above. For example, the width (Y) is larger than that of the printed circuit board 3 shown in FIG.
Components are mounted even on a printed circuit board having a narrow axial width). In this case, the conveyor 2 is rotated according to the rotation of the ball screw shafts 24 and 25 by the operation of the motor 28.
The space between the board conveying conveyors 20 is adjusted to a space corresponding to the printed circuit board by moving 1a toward or away from the conveyor 21b.

At this time, in the mounting machine, since the tray support member 37 of the component supply section 35 and the conveyor 21a are connected to each other via the locking piece 39 and the engaged means 22 as described above, the board transfer apparatus is used. When the conveyor 21a is moved in the Y-axis direction in order to adjust the distance between the conveyors 20, as shown in FIG.
As shown by a solid line and a chain double-dashed line in FIG. 4, the tray support member 37 is moved in the Y-axis direction integrally with the conveyor 21a while the slide member 38 is expanded and contracted. It is arranged to be close to 20.

That is, in this mounting machine, when the components such as the QFP are placed on the tray and the components are supplied, conventionally, the tray installation place is manually corrected when the interval of the substrate carrying conveyor is changed. It's done automatically.

Therefore, incidental work involved in changing the size of the printed circuit board is reduced, and as a result, work efficiency is improved as compared with the conventional device of this type. Moreover, in this mounting machine, the tray support member 37 is slidably supported in the Y-axis direction by the slide member 38, the tray support member 37 is connected to the movable conveyor 21a, and the tray is supported by using the movement of the conveyor 21a. Since the member 37 is moved, there is no need for a dedicated drive system for automatically moving the tray 36. Therefore, the tray 36 can be automatically moved with an extremely simple structure without complicating the structure of the mounting machine or the control system. Can be moved automatically. In particular, since the tray supporting member 37 and the conveyor 21a are configured to move integrally, it is convenient in that there is no fear that the tray supporting member 37 and the conveyor 21a will individually collide with each other and thus collide with each other.

Further, in this mounting machine, since the component supply unit 34 is arranged on the side of the fixed conveyor 21b and the tray 36 of the component supply unit 35 always moves integrally with the movable conveyor 21a, the component supply unit 34 , 35 and the printed circuit board can be kept small. Therefore, the reciprocating movement time of the head unit 5 between the component supply units 34 and 35 and the printed circuit board 3 can be performed in the minimum required time for any size printed circuit board, and thereby the mounting efficiency can be improved. be able to.

Further, in the above embodiment, the slide member 3
8 is detachable from the support block 33, and the tray support member 37 is detachable from the conveyor 21a. Therefore, the slide member 38, the tray support member 37, and the tray 36 are supported as needed. By removing the block 33 and the conveyor 21a and attaching other component supply means to the support block 33 to form the component supply unit 35, there is an advantage that components other than QFP can be supplied. For example, a tape feeder may be attached to the support block 33 so that chip components such as capacitors are supplied from the component supply unit 35 in the same manner as the component supply unit 34.

The mounting machine of the above embodiment is an embodiment of the mounting machine to which the structure of the component supply unit of the present invention is applied.
The specific structure can be appropriately changed without departing from the spirit of the present invention. For example, in the above mounting machine, a slide member 38 is provided as a member for guiding the tray support member 37, and the slide member 38 is used to support the slide block 38.
3 is detachably attached, but a rail extending in the Y-axis direction may be installed on the base 1 and the tray support member 37 may be configured to move integrally with the conveyor 21a along the rail. Good.

Further, in the above mounting machine, as the substrate carrying conveyor, the substrate carrying conveyor 20 in which only one conveyor 21a is movable is applied.
You may make it apply the board | substrate conveyance conveyor to which both a and 21b can move.

[0041]

As described above, in the component supply unit structure of the present invention, the tray support member for supporting the component supply tray is guided in the tray movement direction, and the tray support member is connected to the conveyor. Therefore, when the conveyor is moved to adjust the distance between the pair of conveyors according to the substrate size, the tray supporting member is moved integrally with the conveyor while being guided by the guide member. Always placed near the conveyor. That is, conventionally, the tray installation place is automatically corrected, which was manually performed at the time of adjusting the intervals between the conveyors. Therefore, the incidental work associated with the size change of the printed circuit board is reduced and the work efficiency is improved. Moreover, since the tray supporting member is connected to the conveyor and the tray supporting member is guided in the moving direction of the conveyor by the guide member, the structure is simple and the control system is not complicated. The above-mentioned effects can be obtained.

Further, in such a structure, if the tray support member is detachably connected to the conveyor and the guide member is detachably attached to the base, the tray support portion may be attached as necessary. Also, the guide member can be removed and the component supply means by another method can be installed on the side portion of the conveyor to perform the component supply.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a mounter to which an example of a component supply unit structure according to the present invention is applied.

FIG. 2 is a schematic front view of the mounting machine.

FIG. 3 is a plan view of a main part showing a board transfer conveyor and a component supply unit of the mounting machine.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a plan view of relevant parts showing a connecting portion between a tray supporting member and a conveyor.

[Explanation of symbols]

 1 Base 3 Printed Circuit Board 5 Head Unit 20 Substrate Conveyor 21a, 21b Conveyor 22 Engaged Means 33 Support Block 34, 35 Component Supply Section 36 Tray 37 Tray Support Member 38 Sliding Member 39 Locking Piece

Claims (2)

[Claims] 1. A mounting machine configured to transfer components to be mounted on a printed board by a head unit movably provided above the base, the printed boards being arranged parallel to each other on the base. , A pair of conveyors for transferring substrates, an operating mechanism for relatively approaching and separating each conveyor, a tray for supplying parts on which a large number of parts are mounted side by side, and a tray support for supporting this tray A mounting member provided with a member, a guide member for guiding the tray supporting member in the moving direction of the conveyor, and a connecting means for connecting the tray supporting member to the conveyor movable by the operating mechanism. Parts supply structure. 2. The tray supporting member is detachably connected to the conveyor by the connecting means, and the guide member is detachably attached to the base. The structure of the component supply unit of the mounting machine according to claim 1.