JP2000040900A - Electronic part-fitting device and method for mounting fitting head to it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the fitting time of electronic parts and to reduce manufacturing costs and improve maintenance property. SOLUTION: A device A is provided with a plurality of fitting heads 7. In this case, an elevation drive source 14 of retaining members 9 being mounted to each fitting head 7 is closely connected via a coordination member 18 and the gap of the axial centers of the retaining members 9 is made narrower than the gap of the axial center of each elevation drive source 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting apparatus used in the field of assembling and mounting electronic components and a method of mounting a mounting head of the electronic component mounting apparatus.

[0002]

2. Description of the Related Art In the field of assembling and mounting electronic components such as chip components and IC components on a printed circuit board or the like, a mounting head of a mounting device is used to connect an electronic component supply unit and a mounting unit. A predetermined mounting is performed by reciprocating up and down and repeating the adsorption and desorption.

In a conventional apparatus, as shown in FIG. 6A, a servo motor 82 is attached to a head support member 81 which moves along a lateral guide 80, and a ball screw is attached to an output shaft 83 of the servo motor 82. 84 connected,
A mounting head 85 is screwed to the ball screw 84 so as to be able to move up and down.

Further, in order to improve the mounting efficiency and the like, a plurality of mounting heads 85 are generally provided as four or six as shown in FIG. A suction nozzle 87 for the electronic component b is mounted on a mounting shaft 86 of the mounting head 85, and the suction nozzle 87 is connected via a belt 88 so that a predetermined rotation angle can be obtained about the mounting shaft 86. Individual motor 89
These members 82, 84, 8
Reference numerals 5, 89, etc. are collectively arranged in individual housings 90 attached to the head support member 81.

When mounting the electronic component b on the printed circuit board c, first, the mounting head 85 moves to the supply section of the electronic component b, and the electronic component b of the supply section is transferred to the mounting head 8.
The suction nozzle 87 of No. 5 receives and moves to the mounting portion, and mounts it on the printed circuit board c of the mounting portion. Before the mounting, the suction posture of the electronic component b suction-held by the suction nozzle 87 is determined by a CCD camera. And the like, and the correction is performed individually as necessary.

In this detection step, as shown in FIG. 6B, the head support member 81 travels on a sensor 91 provided at an appropriate position of the electronic component mounting apparatus, or
When the sensor 91 travels below the electronic component b sucked and held by the suction nozzle 87, the mounting head 85,
The suction posture is detected for all the electronic components b held by 85, 85.

However, as a driving source for raising and lowering the plurality of mounting heads 85 and a driving source for rotating the suction nozzle 87,
Since the servo motor 82 and the motor 89 are respectively incorporated in the individual housings 90, the housings 9 having a size larger than the outer dimensions of the motors 82 and 89 are required to support them.
When the housings 90 are arranged side by side, the pitch L1 of the center of the rotation axis of the adjacent suction nozzles 87 becomes inevitably large as shown in FIG. 6B.

Therefore, when a large number of mounting heads 85, 85, 85... Are arranged side by side, a distance L2 between the suction nozzle 87 at one end and the suction nozzle 87 at the other end is provided.
Is relatively large.

Therefore, in the detection of the suction nozzle 87 held by suction by the sensor 91, the moving distance of the entire mounting head 85 or the sensor 91 becomes longer, and the detection time of the electronic component b is extended accordingly. Therefore, the mounting time of the electronic component b is delayed, so that the tact time cannot be reduced.

Further, since the servomotor 82 and the motor 89 are incorporated in the housing 90, even if it is desired to maintain only the motor, the entire mounting head must be removed together with the housing, which takes a lot of time. Poor maintenance. And other various problems.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is directed to an electronic component mounting apparatus having a plurality of mounting heads, wherein a holding member mounted on each mounting head is provided. Are connected via a linking member, and the spacing between the centers of the rotation axes of the respective holding members is made smaller than the spacing between the centers of the axes of the respective lifting and lowering driving sources, so that the mounting time of the electronic component is reduced. Shorten,
It is another object of the present invention to provide an electronic component mounting apparatus and a mounting head mounting method for the electronic component mounting apparatus that can reduce manufacturing costs and improve maintainability.

[0012]

Means of the present invention for achieving the above-mentioned object include an advancing / retreating body attached to an airframe and arbitrarily moving in the front-rear direction by advancing / retreating means, A movable body arbitrarily movable in the left-right direction, and a mounting head that is movably engaged with the movable body by elevating means, and arbitrarily moves an electronic component supply part and a mounting part by the advance / retreat means and the moving means. An electronic component mounting apparatus comprising: a rotation unit configured to rotate a holding member of the mounting head around a longitudinal axis; and a detection unit configured to detect an electronic component held by the holding member. The head includes a support fixed to the movable body, an elevating member attached to the support and capable of ascending and descending and rotating, and a holding member for electronic components provided below the elevating member. The means includes a lifting / lowering positioning member attached to the support and engaging an operating member provided on the lifting / lowering member, and a lifting / lowering drive source attached to the movable body and linked to the lifting / lowering positioning member via a linking member. An electronic component mounting apparatus comprising:

An advancing / retreating body attached to the body and arbitrarily moving in the front-rear direction by advancing / retracting means, a movable body attached to the advancing / retreating body and arbitrarily moving in the left / right direction by the moving means, Engage up and down freely,
A mounting head for arbitrarily moving a supply part and a mounting part of the electronic component by the advancing / retreating means and the moving means; a rotating means for rotating a holding member of the mounting head around a longitudinal axis; In an electronic component mounting apparatus provided with a detecting means for detecting a held electronic component, the mounting head is attached to the movable body, and is attached to the support so as to be movable up and down and rotatable. A lifting and lowering member, comprising a holding member for electronic components provided below the lifting and lowering member, wherein the lifting and lowering means is attached to the support and screwed with a screw body to be provided on the lifting and lowering member; An electronic component mounting apparatus comprising a servomotor attached to the movable body and linked to the screw shaft via a belt.

Further, a plurality of mounting heads are arranged side by side on a movable body via a support, and holding members are respectively attached to the elevating members, and the distance between the rotation shaft centers of the respective holding members is: They are juxtaposed so as to be narrower than the center of the axis of the vertical drive source or the servomotor.

Further, a plurality of mounting heads are arranged in parallel with the movable body via a support, and holding members are respectively attached to the elevating members, and the rotating means connected to each of the holding members is The respective holding members are operated in conjunction by a single rotary drive source.

A plurality of mounting heads are arranged side by side on a movable body via a support, and holding members are respectively attached to the lifting members, and respective lifting drive sources or servos for raising and lowering the holding members are provided. Motor shaft center,
It is provided at a fixed distance from the vertical positioning member or the center of the screw shaft.

An electronic component having a plurality of mounting heads for arbitrarily moving in an arbitrary plane in the left-right direction and the front-rear direction, a vertical axis direction, and a rotation direction about the vertical axis in the electronic component mounting apparatus. In the mounting apparatus, the holding member attached to each of the mounting heads and the lifting drive source are linked via a linking member, and the distance between the rotation axis centers of the respective holding members is set to the distance between the respective lifting drive sources. A mounting head mounting method for an electronic component mounting apparatus in which the distance between the shaft centers is made narrower.

[0018]

An embodiment of an electronic component mounting apparatus and a mounting head mounting method for the electronic component mounting apparatus according to the present invention will now be described with reference to the drawings.

In FIGS. 1 and 2, A denotes a chip component or I
The electronic component mounting apparatus receives an electronic component b such as a C component from its supply unit m, transfers the electronic component b to a mounting unit n, and mounts the electronic component b in a predetermined number of places on the printed circuit board c.

The above-mentioned electronic component mounting apparatus A includes:
A supply unit m for electronic components b that are sequentially conveyed to one side or both sides of the body 1 by a parts feeder or the like and stand by.
However, the mounting part n of the electronic component b into which the printed circuit board c is carried in / out by the transfer member (not shown) in the body 1.
Is provided.

As shown in FIG. 1 and FIG. 2, the reciprocating body 3 is attached to the body 1 and is arbitrarily moved by the reciprocating means 2 in the front-rear direction (arbitrary plane in the Y-axis direction).
And a movable body 5 attached to the advancing / retreating body 3 and arbitrarily moved by the moving means 4 in the left-right direction (arbitrary plane in the X-axis direction).
And the mounting head 7 is engaged with the movable body 5 by the lifting means 6 so as to be able to move up and down.
It is rotatable about a longitudinal axis (Z-axis direction) by a rotating means 8.
6 and 8 are operated with high precision by a servomotor or the like which can be numerically controlled.

The mounting head 7 employs a suction pad type that sucks the upper surface of the electronic component b, a chuck type that grips the outer periphery thereof, and the like. In this embodiment, the suction pad type is shown. In addition, a suction nozzle 9 as a holding member is attached to a lower end portion of the mounting head 7.

The mounting head 7 may be a single head. However, as shown in FIG. 1 or FIGS. 3 and 5, mounting efficiency can be improved if a plurality of heads are formed. , For example, four or six stations.

Further, the mounting head 7 includes a support 10 fixed to the movable body 5, an elevating member 11 attached to the support 10 so as to be able to move up and down and rotate, and an elevating member 11
And a suction nozzle 9 which is a holding member for the electronic component b provided below, and the center of the rotation axis of each holding member (suction nozzle) 9 is on a straight line pp as shown in FIG. It is provided to be located.

As shown in FIG. 2, the elevating means 6 includes a screw shaft 12 serving as an elevating positioning member.
The female screw 13 which is an operation member provided on the upper part of the elevating member 11 is screwed.

Further, at a position separated from the screw shaft 12 by a predetermined distance, the servomotor
And a driving pulley (timing pulley) 16 attached to the output shaft 15 and a passive pulley (timing pulley) 17 attached to the screw shaft 12 which is a vertical positioning member, and a belt (timing) as a linking member. The belt 18 is suspended, and the pulleys 16 and 17 are linked (connected).

Thus, when the servo motor 14 is operated, the female screw body 13 is rotated by the
Is moved up and down along the vertical guide 19 provided on the female screw body 13, that is, the lifting and lowering of the suction nozzle 9, which is the holding member, is numerically controlled in the vertical axis (Z axis) direction. Do exercise.

When a plurality of mounting heads 7 are arranged side by side with the movable body 5 by the structure of the elevating means 6, the respective holding members (suction nozzles) 9 attached to the elevating members 11 of these mounting heads 7 As shown in FIG. 4, the distance e between the centers of the rotating shafts of the adjacent holding members (suction nozzles) 9 may be narrower than the distance f between the centers of the shafts of the elevation drive sources (servo motors) 14. it can.

As shown in FIG. 4, the center of the output shaft 15 of each of the elevation drive sources (servo motors) 14 for elevating and lowering the holding members 9 and the elevation positioning member (screw shaft) 12 Are provided at the same constant distance, so that the linking member (timing belt) 18, which is the same article, can be used.

The rotating means 8 connected to each of the holding members (suction nozzles) 9 described above uses a single rotating drive source, that is,
Operate in conjunction with 0.

As shown in FIG. 2 and FIG. 5, the structure is such that the elevating member 11 can be freely moved in the axial direction to an appropriate position on the elevating member 11 and integrally rotated with respect to the rotation direction. The rotation pulleys (timing pulleys) 21 to be driven are attached, and belts (timing belts) 2 are attached to these rotation pulleys 21 via idler pulleys 22.
The belt 23 is driven by the rotation of a drive pulley 25 attached to an output shaft 24 of the servomotor 20.

In FIGS. 1 and 2, reference numeral 26 denotes an electronic component b sucked and held by the suction nozzle 9 of the mounting head 7.
Conventional means such as a camera sensor such as a CCD or a laser transmitter is used as a detecting means for recognizing the adsorption state of the laser beam.

A signal such as image information from the detecting means 26 is sent to a control means 27 comprising a computer or the like, and is subjected to a predetermined operation or the like, so that the signal is accurately corrected when the electronic component b is mounted on the printed circuit board c. The transmitted signal is transmitted to each of the means 2, 4, 6, and 8 described above.

An operation in which the movable body 5 supporting the mounting head 7 linearly travels on the detecting means 26 fixedly attached to a proper position of the body 1 or an operation provided in the proper place of the body 1 or the movable body 5 The detecting means 26 linearly moves below the electronic component b held by the mounting head 7 by means (not shown), so that the electronic component b held by the suction nozzle 9 supported by the plurality of mounting heads 7. Is subjected to a series of continuous detections.

Therefore, the operation of the embodiment of the electronic component mounting apparatus A and the mounting head mounting method of the electronic component mounting apparatus according to the present invention is as follows.

On the substrate c, a predetermined number of electronic components b are mounted at appropriate places, respectively.
Data such as these set values and operation order are stored in the control means 27 in advance.

The electronic component b is mounted by operating the forward / backward means 2, the moving means 4, the elevating means 6, and the rotating means 8 under the control of the control means 27.
Is moved to the supply section m, and the suction nozzles 9 provided on the respective elevating members 11 respectively receive and hold the electronic component b by suction.

At this time, the lifting / lowering means 6 for moving the plurality of mounting heads 7 is provided with respective servo motors 14.
Are individually operated to transmit the rotation to the screw shaft 12 by the respective belts 18. Accordingly, the screw shaft 12
The female screw body 13 screwed up and down along the vertical guide 19 moves up and down, and the suction nozzle 9 attached to the elevating member 11 performs the movement of descent and ascent.

Each of the mounting heads 7 is supported on the movable body 5 by an individual support 10. The servo motor 14 in the lifting / lowering means 6 is located at a position separated from the support 10. Attached to the movable body 5,
Since the screw shaft 12 is linked by the belt 18, the support 10 is not affected by the outer dimensions of the servomotor 14, that is, as shown in FIG. Irrespective of the size of the mounting head 7,
The pitch e at the center of the rotation axis of the suction nozzles 9, 7, 9,... In 7, 7,.

Therefore, as shown in FIG. 4, the total length L between the electronic components b sucked and held by the suction nozzles 9 is:
Since it is shorter than that of the conventional device, the detecting means 2
When the mounting head 6 or each mounting head 7 moves linearly and laterally, and continuously detects the posture and the like of the electronic component b, the moving distance becomes short, and the detection time, that is, the detected image of the electronic component b is reduced. Can be taken in a short time,
Correspondingly, the posture correction processing has become faster, and the time required for mounting the electronic component b on the printed circuit board c has been significantly reduced.

Even when the servo motor 14 is to be inspected or repaired, since the servo motor 14 is attached to a portion different from the support 10, only the servo motor 14 can be removed from the apparatus A, and maintenance is easy. Significantly improved.

The electronic component b sucked and held by the control means 27 based on the detection result by the detection means 26 described above.
The suction attitude of the electronic component b is corrected by the suction nozzle 9.
Is turned around a vertical axis (Z axis) at a predetermined rotation angle.

In this case, the rotation means 8 linked to each elevating member 11 supporting each suction nozzle 9 is constituted by one servo motor 20 and one belt 23.
A common turning operation can be given to all the suction nozzles 9.

The servo motor 20 is inserted into the support 10.
As described above, the support 10 can be manufactured to be as narrow as possible without being affected by the external dimensions of the servomotor 20, and the pitch e of the axis of the suction nozzle 9 can be minimized as described above. Can be narrowed further,
This has contributed to significantly shortening the tact time for mounting the electronic component b on the printed circuit board c.

As described above, the maintainability of the motor 20 is improved, and the manufacturing cost is reduced.

[0046]

As described above, according to the electronic component mounting apparatus and the mounting head mounting method of the electronic component mounting apparatus of the present invention, when the mounting head is moved up and down, the elevating means is attached to the support and provided on the elevating member. By using a configuration including a lifting / lowering positioning member engaged with an operating member and a lifting / lowering driving source attached to the movable body and linked to the lifting / lowering positioning member via a linking member, the size of the lifting / lowering driving source is reduced. Since the mounting pitch of the mounting head can be narrowed without being affected, the detection distance of the electronic component held by the mounting head by the detecting means is shortened, and the time efficiency of mounting the electronic component on the printed circuit board is greatly improved. To improve
Higher speed can be achieved, and a large amount of mounting processing can be performed in a short time.

Since the lift drive source and the rotary drive source are provided in a portion different from the support, the work of removing the support from the movable body is required for inspection and maintenance of the lift drive source and the rotary drive source. Is eliminated, and maintainability is greatly improved.

The rotating means can reduce the manufacturing cost by operating the respective holding members in conjunction with a single rotating drive source. And so on.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing an embodiment of an electronic component mounting apparatus employing a mounting head mounting method for an electronic component mounting apparatus according to the present invention.

FIG. 2 is an enlarged side view showing a main part of a mounting head unit in FIG.

FIG. 3 is a plan view showing a main part of a mounting head unit in FIG. 2;

FIG. 4 is an explanatory diagram showing a configuration state of a lifting / lowering means of the mounting head in FIG. 2;

FIG. 5 is an explanatory diagram showing a configuration state of a rotation unit of the mounting head in FIG. 2;

6A and 6B schematically show a conventional mounting head elevating mechanism, wherein FIG. 6A is a side view and FIG. 6B is a front view.

[Explanation of symbols]

 Reference Signs List A electronic component mounting device b electronic component 1 body 2 reciprocating means 3 reciprocating body 4 moving means 5 movable body 6 elevating means 7 mounting head 8 rotating means 9 holding member 10 support body 11 elevating member 12 elevating positioning member (screw shaft) 13 operation Member (female thread) 14 Elevating drive source (servo motor) 18 Linking member (belt)

Claims (6)

[Claims] An advancing / retreating body attached to a body and arbitrarily moving in the front-rear direction by advancing / retracting means, a movable body attached to the advancing / retreating body and arbitrarily moving in the left / right direction by the moving means, A mounting head that is movably moved up and down to arbitrarily move an electronic component supply unit and a mounting unit by the advancing / retreating unit and the moving unit, and a rotation that rotates a holding member of the mounting head about a longitudinal axis. Means, and an electronic component mounting device comprising: a detection unit for detecting an electronic component held by the holding member, wherein the mounting head is fixed to the movable body, and attached to the support. An elevating member that can be moved up and down and rotatable; and a holding member for electronic components provided below the elevating member. The elevating means is attached to the support and provided on the elevating member. And elevating the positioning member is engaged with the electronic component mounting apparatus characterized by comprising a lifting drive source is linked via a coupling member to the elevating positioning member is attached to the movable body. 2. An advancing / retreating body attached to the body and arbitrarily moving in the front-rear direction by advancing / retreating means, a movable body attached to the advancing / retreating body and arbitrarily moving in the left / right direction by the moving means, A mounting head that is movably moved up and down to arbitrarily move an electronic component supply unit and a mounting unit by the advancing / retreating unit and the moving unit, and a rotation that rotates a holding member of the mounting head about a longitudinal axis. Means, and an electronic component mounting device comprising: a detection unit for detecting an electronic component held by the holding member, wherein the mounting head is fixed to the movable body, and attached to the support. An elevating member that can be raised and lowered and rotatable, and a holding member for electronic components provided below the elevating member. The elevating means is attached to the support and provided on the elevating member with a screw. A screw shaft which is screwed to the electronic component mounting apparatus characterized by comprising a servo motor which said attached to the movable member is linked through a belt to the screw shaft. 3. A plurality of mounting heads are arranged side by side on a movable body via a support, and holding members are respectively attached to the elevating members, and the distance between the rotation shaft centers of the respective holding members is: 3. The electronic component mounting apparatus according to claim 1, wherein the vertical driving sources or the servo motors are arranged side by side so as to be narrower than the center of the axis. 4. A plurality of mounting heads are arranged side by side on a movable body via a support, and holding members are respectively attached to the elevating members, and rotating means connected to each of the holding members comprises: 3. The electronic component mounting apparatus according to claim 1, wherein each of the holding members is operated in conjunction with a single rotary drive source. 5. A plurality of mounting heads are arranged side by side on a movable body via a support, and holding members are respectively attached to the lifting members, and respective lifting drive sources or servos for raising and lowering the holding members are provided. 3. The electronic component mounting device according to claim 1, wherein a distance between a shaft center of the motor and a shaft center of the lifting / lowering positioning member or the screw shaft is provided at a fixed distance. 6. An electronic component having a plurality of mounting heads for arbitrarily moving in an arbitrary plane in a horizontal direction and a front-rear direction, a vertical axis direction, and a rotation direction about the vertical axis in an electronic component mounting apparatus. In the mounting apparatus, the holding member attached to each of the mounting heads and the lifting drive source are linked via a linking member, and the distance between the rotation axis centers of the respective holding members is set to the distance between the respective lifting drive sources. A mounting head mounting method for an electronic component mounting apparatus, wherein the mounting head is narrower than a distance between shaft centers.