JP2692235B2 - Component mounting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting apparatus used when an electronic component is sucked and mounted on a circuit board.

2. Description of the Related Art Conventionally, as an electronic component mounting apparatus for mounting electronic components on a circuit board, a plurality of component supply units containing a large number of electronic components are arranged in parallel on a moving table and the moving table is mounted on the component supplying unit. By making it movable in the parallel direction, it is possible to take out an electronic component housed in an arbitrary component supply unit at a predetermined position, and on the other hand, a position where the electronic component of the circuit board is to be mounted comes to a predetermined position. It is well known that a means for positioning the supplied circuit board is provided, and a component mounting means for holding an electronic component at the predetermined component take-out position and mounting a component at the predetermined position on the positioned circuit board is well known. ing.

In such an electronic component mounting apparatus, it is possible to cope with the case where various types of electronic components are mounted on one circuit board, and to reduce the replacement of the component supply unit when changing the type of the circuit board for switching. If a large number of component supply units are installed on the moving table in order to reduce the loss time, the driving force of the moving means must be increased because the moving table becomes large, and the inertia becomes large. Therefore, there is a problem that speeding up becomes difficult.

Therefore, the moving table is composed of a pair of moving tables that are individually movable along a common moving path, and a plurality of component supply units are installed in each moving table. A parallel feed screw and its drive motor are arranged, and nuts screwed to each feed screw are fixed to the lower surface of the corresponding moving table so that the moving table can be selectively used according to the mounting conditions. Is disclosed in JP-A-62-140499.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the electronic component mounting apparatus disclosed in the above-mentioned patent publication, in order to move each moving table separately, a feed screw and its drive motor are arranged for each moving table. There is. Therefore, since two long feed screws corresponding to the moving range of the moving table are required, the cost becomes high, and since the feed screw for transmitting the driving torque is long, in order to reduce the twist angle at the time of driving, the axis of the shaft is reduced. It is necessary to increase the diameter, and as a result, the weight increases and the inertia increases, which causes various difficulties in increasing the mounting speed, which is an obstacle to the increase in speed.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a component mounting apparatus that can reduce the inertia when moving a pair of moving tables and can increase the speed.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention can move a plurality of accommodated components in a parallel direction by arranging a plurality of component supply units capable of sequentially sending out to a predetermined component take-out position. A component supply unit arranged on a movable table, positioning means for the mounting member for positioning the mounting member for mounting the component, holding the component at a predetermined position of the component supply unit, and mounting the component on the mounting member. In the component mounting apparatus including the component mounting means to be mounted on, the plurality of movable tables of the component supply unit have a structure that can be independently moved on the same movement path, Is provided in each of the moving table and the shaft whose both ends are fixed in a single or series along the moving path, engages with the shaft, and relatively moves in the axial direction thereof. It is characterized in that it is composed of a driving means for operating.

Effect According to the present invention, since a pair of moving tables that can move separately on a common moving path are provided, it is possible to selectively use any one of the moving tables as needed to mount components. As a result, the weight of the moving table can be reduced and the mounting speed can be increased. Further, the cot can be installed in advance on the moving table which is not used, and the loss time required for changing the type of the mounting member and the addition of parts can be shortened and the operating rate is improved. In addition, since each moving table is driven by the driving means mounted on each moving table acting on a fixed single shaft or a plurality of shafts installed in series, there is no need to rotate a long shaft. Therefore, the vibration of the shaft can be suppressed, and since it is not necessary to drive a heavy shaft, the inertia can be reduced, the moving table can be moved and stopped at high speed, and the component mounting speed can be further increased. be able to.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a component supply unit in which a large number of component supply units 2 are arranged in parallel, and is configured so that an arbitrary component supply unit 2 can be positioned at a predetermined component supply position 1a as will be described in detail later. Has been done. The component supply unit 2 has many parts. A tape-shaped component assembly holding a large number of components in a line is mounted on the component supply unit 2, and the components can be sequentially delivered to a component extraction position 2a provided at one end.

Reference numeral 3 denotes a revolving type component mounting unit, in which a plurality of mounting heads 5 are arranged at equal intervals on a rotary table 4 that can rotate intermittently around a fixed axis. The rotary table 4 rotates intermittently at intervals of the placement of the mounting heads 5, and the stop position of the mounting head 5 is set at the component supply position 1a and the component mounting position 3a. The mounting head 5 is provided with a suction nozzle (not shown) that can move up and down, moves down at the component supply position 1a to suction the component, then rises, and moves down at the component mounting position 3a to suction the component. It is configured to rise after the component is mounted by releasing.

Reference numeral 6 denotes a positioning unit for positioning the circuit board 10 on which components are to be mounted. The fixing means 7 for fixing and supporting the circuit board 10 supplied by supply means (not shown) at a predetermined position is provided on an X table 8 movable in the X direction. The X table 8 is installed on a Y table 9 which is movable in the Y direction, and an arbitrary position of the circuit board 10 fixed and supported is moved to the component mounting position 3a.
It is configured so as to be able to be positioned.

Next, the configuration of the component supply unit 1 will be described in detail. A plurality of the component supply units 2 are installed in parallel on each of the pair of moving tables 11a and 11b. These moving tables 11a and 11b are movably supported along a guide frame 12 extending long in the parallel direction of the component supply unit 2. This guide frame 12 has a length corresponding to the sum of the lengths of the two moving tables 11a and 11b on both sides of the component supply position 1a, and in any one of the moving tables, the other moving table is provided at the end of the guide frame 12. It is configured so that an arbitrary component supply unit 2 can be positioned opposite to the component supply position 1a in a standby state.

On one side of the guide frame 12, a ball screw shaft 13 having a length substantially extending over the entire length is arranged, and both ends thereof are fixed to a mounting bracket 14 as shown in FIG. It is attached to the guide frame 12.

A nut 15 that is screwed onto the ball screw shaft 13 is provided on each of the moving tables 11a and 11b. The nut 15 has a movable table 11 at its both ends via bearings 16.
It is rotatably supported by a pair of support blocks 17a and 17b attached to a and 11b, and a pinion 18 is fitted and fixed to the outer periphery of the nut 15. A drive gear 19 meshing with the pinion 18 is attached to the output shaft of the drive motor 20 mounted on the one support block 17a.

Next, the operation will be described. First, one moving table 11
A plurality of component supply units 2 accommodating various components to be mounted on the circuit board 10 are installed on a, and the other moving table 11
Place b on the end of the guide frame 12 so that it stands by. Also,
The circuit board 10 is supplied to the fixing means 7 of the positioning unit 6 by the supplying means and fixedly supported at a predetermined position.

The moving table 11a is moved from this state, and the component supply unit 2 accommodating the components to be mounted is sequentially located at the component supply position 1a based on the preset mounting order of the components. In this way, the components positioned at the component supply position 1a are sequentially held by the mounting head 5 of the component mounting unit 3,
As the rotary table 4 rotates, the component mounting position 3a
Go to On the other hand, the positioning unit 6 moves the circuit board 10 in the X and Y directions to sequentially position the components to be mounted in the component mounting position 3a in accordance with the preset mounting sequence of the components. The components held by 5 are sequentially mounted at predetermined positions on the circuit board 10.

During the component mounting operation by the one moving table 11a, the component supply unit 2 corresponding to the model of the circuit board on which the component is to be mounted next is previously installed and placed on the other moving table 11b on standby. . Then, when component mounting by the component supply unit 2 on the moving table 11a is completed, the moving table 11a immediately moves to the standby position, and the moving table 11b waiting is moved, and the component supplying unit 2 on it. The component mounting on the circuit board 10 is started.

Needless to say, the same operation can be performed not only when the model of the circuit board 10 is changed but also when the number of parts of the part supply unit 2 on the moving table that is operating is insufficient. When there are many types of components to be mounted and the mounting order is limited, both moving tables 11a and 11b can be selectively moved during a series of component mounting operations to mount the components.

The moving table 11 during the above component mounting operation
When moving a and 11b, it is only necessary to move and drive the small and lightweight moving tables 11a and 11b in which the number of component supply units 2 required for normal component mounting are installed, and therefore, it is possible to move at high speed.
It can be stopped and can be mounted at high speed. Further, since the moving tables 11a and 11b are moved by rotationally driving the nut 15 screwed to the single ball screw shaft 13 fixedly arranged along the guide frame 12 by the drive motor 20, The long and heavy ball screw shaft 13 does not need to be rotationally driven, the inertia is small accordingly, high-speed movement / stop is easily possible, and the ball screw shaft 13 can be mounted at higher speed. In addition, the pair of moving tables 11a and 11b
Only one ball screw shaft 13 is required to move the, and the cost is low.

In the above embodiment, the nut screwed onto the ball screw shaft 13
Although 15 is rotationally driven by a drive motor 20 via a pinion 18 and a drive gear 19, as shown in FIG. 5, a rotor 22 is a drive motor 21 having a hollow shaft. If the nut 15 is fixed to the inner circumference of the member 22, the drive system inertia can be made even more compact.

Further, the moving means of the moving tables 11a and 11b is not limited to the combination of the fixed ball screw shaft 13 and the nut 15 which can be rotationally driven, and a rack and a pinion or a linear motor may be used.

Further, in the above embodiment, the swivel type component mounting unit 3 is used.
An example is shown in which the circuit board 10 is moved in the X and Y directions so that the position where the component is to be mounted coincides with the fixed component mounting position 3a. However, the circuit board 10 is fixedly installed or in one direction. Alternatively, the mounting head 5 may be moved only to an arbitrary position where the components of the circuit board 10 should be mounted.

EFFECTS OF THE INVENTION According to the present invention, since a pair of moving tables is provided and one of the moving tables is selectively used as necessary to mount components, the weight of the moving table is reduced, It is possible to speed up the mounting, and it is possible to previously install a component supply unit containing the component to be mounted next to the unused moving table,
The loss time required for changing the type of mounting member and adding parts can be shortened to improve the operation rate, and a fixed moving table can be driven separately for each pair of movable tables that can be moved on a common moving path. Driving is performed by operating the drive means attached to each moving table on a single shaft or a plurality of shafts installed in series, and it is not necessary to drive a heavy shaft, so vibration of the shaft is eliminated. In addition to being able to suppress it, the inertia can be reduced, the moving table can be moved and stopped at high speed, and the speed of component mounting can be further increased, which is a great effect.

[Brief description of the drawings]

1 to 4 show a component mounting apparatus according to an embodiment of the present invention. FIG. 1 is an overall plan view, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. FIG. 3 is a sectional view taken along the line III-III in FIG. 4, FIG. 4 is a perspective view showing the entire structure of the moving means of the moving table, and FIG. 5 is a partial perspective view of the moving means of another embodiment of the present invention. 1 ... Component supply unit, 1a ... Component supply position, 2 ... Component supply unit, 3 ... Component mounting unit, 6 ... Positioning unit, 10 ... Circuit board, 11a, 11b ... Moveable table, 12 ... … Guide frame, 13… Ball screw shaft, 15…
… Nuts, 20, 21… Drive motors.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takatoshi Ichiyanagi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP 61-239696 (JP, A) JP 62 -21300 (JP, A)

Claims (1)

(57) [Claims] 1. A component supply unit in which a plurality of component supply units capable of sequentially sending out a plurality of accommodated components to a predetermined component extraction position are arranged in parallel and arranged on a moving table movable in the parallel direction, and the component. In the component mounting apparatus, the mounting member positioning means for positioning the mounting member for mounting the component, and the component mounting means for holding the component at a predetermined position of the component supply part and mounting the component on the mounting member. The moving table of the component supply unit has a structure in which a plurality of moving tables can be independently moved on the same moving path, and the moving means of these moving tables are single or in series along the moving path, It is characterized by comprising a shaft body whose both ends are fixed, and a drive means which is provided on each of the movable tables and which engages with the shaft body and relatively moves in the axial direction thereof. Component mounting apparatus according to symptoms.