JPH0255960B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an electronic component mounting device.

More specifically, the present invention relates to an apparatus for cutting a pair of lead wires of an electronic component inserted into a mounting hole of a printed circuit board and protruding toward the back side thereof into a predetermined length, and bending them in directions facing each other.

[Prior Art] Conventionally, there are various types of electronic component mounting devices that automatically cut the lead wires of electronic components inserted into the mounting holes of a printed circuit board and protrude toward the back side to a predetermined length and bend them in directions facing each other. A number of different types have been developed, and a representative example thereof is disclosed in Japanese Patent Application Laid-open No. 58-184793.

In detail, the center carrier is arranged below the printed circuit board so that it can move in two mutually orthogonal directions in a plane parallel to the printed circuit board set on the work table, and the piston rod is moved toward the printed circuit board. A hydraulic actuator mounted on a center carrier so as to be able to project a predetermined stroke and rotate at a predetermined angle with respect to the center line of the piston rod; a head table fixed to the upper end of the piston rod of the actuator; a fixed knife; A pair of cutter devices having movable knives mounted on a head table so as to face each other so as to be able to approach and separate from each other; A pair of lead wires is received in a cutting hole provided in each fixed knife, and a movable knife is applied to the fixed knife to cut the lead wires to a predetermined length and bend them in directions facing each other. An electronic component mounting device is disclosed.

[Problems to be Solved by the Invention] However, in this known mounting device, in order to collect the lead wires cut by the cutter device without scattering them onto the head table etc., the cutter to which the fixed knife is fixed is attached. A lead wire insertion hole is drilled in the turbine bracket to connect to the cutting hole of the fixed knife, and a discharge pipe is connected to this insertion hole, and the lead wire is cut by sucking the air in the discharge pipe while the cutter device is in operation. was discharged to another appropriate location.

However, because such discharge pipes have a small diameter from the viewpoint of the device structure and are installed with appropriate bends, pipe clogging is likely to occur.
Therefore, it has been difficult to always properly discharge the lead wire.

In order to improve this point, the inventors of the present invention made a through hole in the piston rod of the fluid pressure actuator that moves the head table up and down, and made cutting using this through hole. However, simply drilling a through hole in the piston rod of a fluid pressure actuator does not make it possible to reliably feed the cut lead wire into the through hole. In other words, it is difficult to cut the lead wire at a location that is not located on the center line of the piston rod, or the cut lead wire may scatter to other locations.

Therefore, as a result of further study, it was decided that the screen should be installed between the pair of cutter devices so that the screen can be wound up and unwound as the two cutter devices move, and that a lead wire feeding shooter should be connected to the upper end of the through hole of the piston rod. It was discovered that the above-mentioned problem could be solved by installing a .

[Means for solving the problem] That is, the electronic component mounting device according to the present invention has the following features:
A center carrier is disposed below the printed circuit board so that it can move in two mutually orthogonal directions in a plane parallel to the printed circuit board set on the work table, and a piston rod is moved toward the printed circuit board in a predetermined direction. a hydraulic actuator mounted on the center carrier so as to be able to extend a stroke and rotate at a predetermined angle with respect to the center line of the piston rod; a head table fixed to the upper end of the piston rod; a fixed knife; and a pair of cutter devices having knives mounted on the head table so as to face each other so as to be able to approach and separate, the electronic component being inserted into a mounting hole of the printed circuit board and protruding toward the back side thereof. A pair of lead wires is received in a cutting hole penetrated by each fixed knife, and a movable knife acts on the fixed knife to cut the lead wires to a predetermined length and bend them in directions facing each other. In the electronic component mounting apparatus, at least a pair of screens are installed between both cutter devices so that a screen for preventing the cut lead wire from scattering can be wound and unwound as the cutter devices move. and a lead wire feed shooter located below the screen and fixed on the head table so as to connect the feed port to the upper end port of the through hole of the piston rod. It is characterized by being worn.

[Example] Hereinafter, an example will be described based on the drawings. In Fig. 1, which shows a longitudinal section of the main part of the electronic component mounting device, 1 is a center carrier, 2 is a center carrier, and 2 is a center carrier.
3 represents a fluid pressure actuator, 3 represents a circular head table, 4a and 4b represent cutter devices, and
The center carrier 1 is attached to a carrier movement control device 5, as shown in FIG. 2, which is a Z-direction view of FIG. The guide shafts 7a and 7b are supported by bearings 6, and the threaded shafts 9 are supported by nuts 8 mounted on the center carrier 1, and one end of the guide shafts 7a and 7b is supported so that they cannot rotate. together with screw shaft 9
It supports one end so that it can rotate, and supports the other end so that it cannot rotate the driven side carrier 11, which is mounted so that it can move guided by the rail 10, and the guide shafts 7a and 7b. a drive-side carrier 14 that supports the other end of the screw shaft 9 so as to be able to rotate therewith, is equipped with a nut for supporting the screw shaft 12, and is mounted so that it can be moved while being guided by a rail 13; This carrier 1
4, a shaft coupling mechanism 16 that connects the output shaft of this motor 15 and the screw shaft 9, and a shaft joint that connects the screw shaft 12 and the output shaft of the motor 17. It is composed of a mechanism 18.

The carrier movement control device 5 configured as described above is installed in the box-shaped work table 19 shown in FIG.
A bearing rotatably supporting the end (not shown) of the working table 19 is fixed to the bottom frame of the working table 19, and the rails 10, 13 are likewise fixed to the bottom frame.

For this reason, by driving the motors 15 and 17, the printed circuit board 20 set on the work table 19 is set in a plane parallel to the printed circuit board 20, which is perpendicular to each other.
The center carrier 1 can be moved in two directions: the X1-X2 direction and the Y1-Y2 direction. In this case, the motor 17 drives the center carrier 1 along with both carriers 11 and 14.
It is moved in the X1-X2 direction, and is also moved in the Y1-Y2 direction by the drive of the motor 15.

Next, the fluid pressure actuator 2 is fixed to a housing 31 mounted on the center carrier 1 via a bearing 30 by two bolts 32 arranged in a 180 degree positional relationship, and therefore the through hole 3
3 can be rotated together with the housing 31 based on the centerline C--C of the piston rod 32 in which the piston rod 32 is bored.

Note that the piston rod 34 is connected to the cylinder 35.
By supplying pressurized air inside, it can be protruded toward the printed circuit board 20 (upward) or away from the printed circuit board 20 (downward). At this time, pressurized air is supplied from a nozzle (not shown) into the cavity 38 formed between the piston head 36 and the cylinder flange 37. Further, a stopper 39 and a lock nut 40 are screwed onto the lower end of the piston rod 34.
In addition, a buffer plate 41 is fixed to the stopper 39.

Next, the head table 3 is fixed by a bolt 52 to the upper end of a slide shaft 51 that is supported so as to be able to move up and down by a bearing 50 mounted on the center carrier 1, and a shaft is attached to the upper end of the piston rod 34. It is fixed by a retaining ring 53,
It is mounted so that it can move up and down parallel to the printed circuit board 20 by controlling the protrusion of the piston rod 34. Note that four slide shafts 51 are installed in a 90 degree positional relationship, and the head table 3
is fixed so as not to block the through hole 33 of the piston rod 34.

Next, the cutter devices 4a and 4b are mounted on the head table 3 by bolts 60, as shown in FIG. 4, which is a right side view of FIG. 1, and FIG. 5, which is a plan view of FIG. It is mounted on a pair of fixed cutter stands 61a and 61b, and both are arranged facing each other on the X1-X2 axis.

Specifically, the cutter device 4a has a sliding bearing mechanism 62 at the upper end of the cutter stands 61a, 61b.
Cutter base 6 engaged via a, 62b
3a, a cutter bracket 65a fixed to this base 63a with bolts 64a, and an air cylinder type fluid pressure actuator 67 fixed to this bracket 65a with bolts 66a.
a, a cutter rod 70a screwed onto the piston rod 68a of the actuator 67a and fixed by a nut 69a, and a movable cutter 71a engaged with the cutter rod 70a.
, a fixed cutter 72a fixed to a cutter bracket 65a, and a cutter guide 73a.

Note that the fixed cutter 72a has a cutting hole 74a penetrated at its tip as shown enlarged in FIG. 6, and in FIG. As shown, the cutter 72a is fixed by two bolts 75a.
A cutter guide 73a is fixed to the cutter bracket 65a, and a movable cutter 71a and a cutter rod 70a are fixed to the cutter bracket 65a.
The head 77a of the cutter rod 70a is inserted into a locking recess 76a provided in the cutter rod 70a and engaged with each other.

On the other hand, the cutter device 4b is also provided in the same manner as the cutter device 4a described above. Therefore, according to both cutter devices 4a and 4b, as shown in FIG.
A pair of lead wires 80 of the electronic component 79 inserted into the electronic component 8 and protruding to the back side thereof are received into the cutting holes 74a, 74b of the fixed cutters 72a, 72b, and the movable cutters 71a, 71b are operated. It can be cut to a predetermined length and bent in directions facing each other.

At this time, the center carrier 1 is moved by the carrier movement control device 5 so that the center line C-C of the piston rod 34 is positioned at the midpoint between the pair of mounting holes 78 bored in the printed circuit board 20. The carrier 1 is positioned and then the piston rod 3 of the hydraulic actuator 2
4 is projected upward toward the printed circuit board 20,
Along with this, the head table 3 is raised and the lead wire 80 of the electronic component 79 is received into the cutting holes 74a, 74b of the cutter devices 4a, 4b.

Note that when the lead wires 80 are received into the cutting holes 74a, 74b in this manner, the tips of the fixed cutters 72a, 72b are located at positions suitable for cutting and bending, that is, at predetermined positions below the printed circuit board 20. Therefore, when the piston rods 68a, 68b of the hydraulic actuators 67a, 67b are protruded, the movable cutters 71a, 71b slide on the fixed cutters 72a, 72b toward the printed circuit board 20. The lead wires 80 can be cut by moving the lead wires 80 and bent in directions facing each other. In FIG. 8, the electronic component 79 is shown bent in directions facing each other by both cutter devices 4a and 4b and attached.

In addition, at that time, the cutting hole 74a of one cutter device 4a and the cutting hole 74 of the other cutter device 4b
The pitch between the two lead wires 80 of the electronic component 79 is adjusted to be the same as the pitch between the pair of lead wires 80 of the electronic component 79, and each cutting hole 74a,
A lead wire 80 is received at 74b, and this pitch adjustment is performed by a cutter base movement control device 90.

The cutter base movement control device 90 has the fourth and fifth cutter base movement control devices.
As shown in FIG. 9, which is a view taken along arrow W in FIG. A stepping motor 93 is fixed, and one end thereof is connected to the output shaft of this motor 93 via a shaft coupling 94, and the other end is connected to the bracket 9.
3, and nuts 95a and 95b engaged with this screw shaft 97.

Note that the nut 95a and the threaded shaft 97 are engaged with each other by a left-hand thread, and the nut 95b and the threaded shaft 97 are engaged with each other by a right-hand thread, and are fitted into the nut support portions of the cutter bases 63a and 63b. The nuts 95a and 95b have flanges 99 fixed to the end surfaces of the support portions by bolts 98.
a, 99b so as not to rotate.

Therefore, by driving the stepping motor 93 and rotating the screw shaft 97, the nuts 95a,
Use cutter bases 63a and 63b together with 95b.
It can be moved in the X1-X2 direction, and the pitch between the cutting holes 74a and 74b of both cutter devices 4a and 4b can be adjusted to a predetermined value.

That is, when the screw shaft 97 is rotated clockwise, the cutter bases 63a, 63b are moved closer to each other, and when the screw shaft 97 is rotated counterclockwise, the cutter bases 63a, 63b are moved away from each other. The moving distance is controlled by counting pulses emitted as the stepping motor 93 is driven.

FIG. 5 shows the cutter base 63a being moved to the maximum in the X1 direction and the cutter base 63b being moved to the maximum in the X2 direction. Although not shown, when adjusting the pitch between the cutting holes 74a and 74b to a predetermined value as described above, the cutter base 6
An overrun prevention device is further provided to prevent troubles such as when the members 3a and 63b approach each other abnormally and collide with each other.

This allows the detection pin attached to one cutter base 63a to be transferred to the other cutter base 63a.
When the proximity switch installed in b detects,
The stepping motor 93 is configured to stop driving.

Next, in the case where a pair of lead wires 80 of the electronic component 79 arranged in the Y1-Y2 direction orthogonal to each other in the same plane as the X1-X2 direction are cut and bent in directions facing each other, FIGS. Both cutter devices 4a and 4b are positioned in the Y1-Y2 direction by the table rotation control device 100 shown in FIG. 10, which is an enlarged view of FIG.

This table rotation control device 100 includes a bracket 102 fixed to the center carrier 1 by bolts 101, a stopper 103 screwed to the bracket 102, and an air cylinder fixed to the bracket 102 by bolts (not shown). type hydraulic actuator 104;
A joint 108 connects an arm 106 pivotally supported by a flange 105 and a piston rod 107 of the actuator 104, a bracket 110 fixed to the center carrier 1 with a bolt 109, and a stopper 111 screwed to this bracket 110. and an attachment 113 fixed to the flange 105 with bolts 112. Note that the flange 105 is connected to the bolt 114 as shown in FIG.
It is fixed to the housing 31 by.

Therefore, by moving the piston rod 107 of the fluid pressure actuator 104 in and out, the housing 31 can be rotated, and the fluid pressure actuator 2 fixed to the housing 31 can also be rotated with respect to the center line of the piston rod 34. Therefore, the head table 3 is rotated to cut both cutter devices 4a and 4b.
It can be positioned in the X1-X2 direction or the Y1-Y2 direction.

In addition, when the piston rod 107 of the fluid pressure actuator 104 is protruded at that time, the attachment 113 is moved together with the flange 105 into the tenth position.
The piston rod 107 is rotated to the left in the figure, and the piston rod 107 is projected until it abuts against the stopper 103. Further, when the piston rod 107 of the fluid pressure actuator 104 is depressed, the attachment 113 is rotated to the right together with the flange 105, and the piston rod 107 is depressed until it contacts the stopper 111.

As shown in FIG. 10, when the attachment 113 is in contact with the stopper 103, both cutter devices 4
The cutting holes 74a and 74b of a and 4b are located in the X1-X2 direction, and in the state in which they are brought into contact with the stopper 111, are located in the Y1-Y2 direction. Although not described in detail, the leads arranged in the Y1-Y2 direction are cut through a process similar to that in which a pair of lead wires 80 of the electronic component 79 arranged in the X1-X2 direction are cut and bent in directions facing each other. The wire 80 can also be cut and bent in directions facing each other.

As described above, according to the present device, both the cutter devices 4a and 4b can be oriented in the X1-X2 direction or the Y1-Y2 direction, and therefore the work table 1
After setting the printed circuit board 20 on the board 9, electronic components 79 can be attached one after another without moving it. The lead wires cut by both cutter devices 4a, 4b are then cut by a pair of screen devices 120a, 120 shown in FIG.
b and the shooter 1 shown in FIG.
21, a through hole 3 which is collected by a lead wire discharge device 123 composed of skirts 122a, 122b, etc. and drilled in the piston rod 34.
3 and is discharged.

Specifically, as shown in FIG. 11, which is a front view of this lead wire discharging device 123, and FIG. 12, which is a plan view of this figure, both screen devices 120a and 120b are configured to cover a glass sheet or the like. Screens 124a and 124b made of a flexible sheet material for preventing static electricity are installed between both cutter devices 4a and 4b.

Note that since both screen devices 120a and 120b have the same configuration, only one screen device 120a will be described in detail. One end of the screen 124a is fixed to the cutter bracket 65b of the cutter device 4b with a machine screw 125a. The other end is supported by a take-up and unwind mechanism 128a whose detailed structure is shown in FIG. 13.

This winding and unwinding mechanism 128a includes a case 130a.
is fixed to the cutter bracket 65a of the cutter device 4a by a bolt 131a, and a shaft 134a is rotatably supported by a first cap 132a and a housing 133a screwed onto the case 130a. One end of the screen 124a wrapped around the holding plate 1
Fix the presser plate 135a to the shaft 134a with machine screws 136a so as to firmly nip it at 35a, and then tighten the spiral spring 1 inserted into the housing 133a.
One end of the shaft 134a is inserted into a slit provided at the lower end of the shaft 134a and locked, and the other end is inserted into a slit provided in the housing 133a and locked. Note that 138a is a second cap screwed onto the housing 133a.

In this way, the winding and unwinding mechanisms 128a, 128b
Since the screens 124a, 124b can be automatically wound up or unwound by rotating the shafts 134a, 134b as the cutter devices 4a, 4b move, the screens 124a, 124b can be automatically wound up or unwound. , 124b can be kept under tension at all times, and the lead wires cut from between the two cutter devices 4a and 4b can be prevented from scattering outside the device, and the collected lead wires can be placed below. It can be accommodated in the shooter 121.

Note that the shooter 121 is a cutter device 4a,
The head table 3 is fixed to the head table 3 by bolts 140 shown in FIG. 4 so as not to interfere with the movement of the head table 3.
is connected to a through hole 33 drilled in the piston rod 34 as shown in FIG.

Further, the skirt 122a is fixed to the cutter bracket 65a with machine screws (not shown) to prevent the cut lead wire from passing through the opening 143a of the cutter bracket 65a and falling. The cutter bracket 65b is fixed to the cutter bracket 65b by machine screws (not shown) to prevent the cut lead wire from passing through the opening 143b of the cutter bracket 65b and falling. Furthermore, the through hole 33 of the piston rod 34 is
The size is large enough to prevent lead wires from clogging, and the lead wires to be discharged are stored in a tray (not shown) that is removably attached to the bottom frame of the work table 19. will be collected.

As described above, since this mounting device is provided with the lead wire discharging device 123, the cut lead wires can be prevented from scattering, almost completely collected, and can be collected using the through hole 33 of the piston rod 34. can be drained and therefore can always be drained well.

Note that the work table 19 shown in FIG. 3 is attached to a support 151 that is extendably attached to a cart 150 so as to be swingable, so that the work table 19 can be easily operated by the worker. It can be adjusted to an appropriate height and tilted at an appropriate angle.

Further, the printed circuit board 20 is set at a predetermined position on the work table 19 by a worker, and when attaching the electronic component 79 to the circuit board 20, the center carrier 1 is moved to a predetermined position by the carrier movement control device 5. selected. At this time, the head table 3 has been lowered, and when the center carrier 1 is selected to a predetermined position, the fluid pressure actuator 2 is operated and the head table 3 is raised. Further, while the center carrier 1 is being moved, the rotation of the head table 3 and the movement of the cutter devices 4a and 4b are controlled.

In this way, the mounting hole 78 of the printed circuit board 20 is
The cutting holes 74 of both cutter devices 4a, 4b
When the head table 3 is raised with the tubes 154a and 74b positioned, light is projected from the tips of the tubes 154a and 154b shown in FIG. The lead wire 80 of the selected predetermined electronic component 79 is inserted into the specified mounting hole 78 after confirmation by a person in charge.

Next, when the operation pedal 153 is pressed with a foot, the movable cutters 71a, 71 of the cutter devices 4a, 4b are moved.
b slides on the fixed cutters 72a and 72b toward the printed circuit board 20 to cut and bend the lead wire 80. After cutting and bending, the head table 3 is lowered and the center carrier 1 is moved to the next cutting and bending position. Thereafter, electronic components 79 can be attached to the printed circuit board 20 one after another in the same manner.

After the printed circuit board 20 is set at a predetermined position on the work table 19, it is fixed at the same place until all installation is completed and is not moved during the work.
Further, the tubes 154a, 154b are fixed to cutter brackets 65a, 65b by appropriate means, and an optical fiber is introduced into these, and one end of this optical fiber is connected to a light emitting device (not shown). There is.

Although one embodiment has been described above, in the present invention, regarding the lead wire discharge device, the skirt 12
2a and 122b can be omitted, but if these are attached, the scattering of the lead wires can be prevented and the lead wires can be collected more completely.

[Effects of the Invention] As described above, according to the present invention, the printed circuit board set on the work table can be used not only for electronic components where the pitch between the lead wires is constant, but also for electronic components where the pitch between the lead wires is various. Electronic components can also be mounted in multiple directions, and when mounting them, the upper end of the through-hole drilled in the piston rod collects the cut lead wires while preventing them from scattering. This provides an electronic component mounting device that can be fed into and efficiently discharged.

[Brief explanation of drawings]

1 to 13 show embodiments of the present invention, in which FIG. 1 is a vertical sectional view of the main parts of the electronic component mounting device, and FIG.
The figures are a Z arrow view in Fig. 1, Fig. 3 is a front view showing the schematic structure of the work table, Fig. 4 is a right side view of Fig. 1, Fig. 5 is a plan view of Fig. 1, and Fig. 6 is a front view showing the schematic structure of the work table. The figure is a longitudinal sectional view showing how the lead wire is cut and bent by the cutter device 4a, FIG. 7 is a view taken along the V arrow in FIG. 6, and FIG. 8 is a longitudinal sectional view showing the electronic component 79 attached to the printed circuit board. , FIG. 9 is a view taken along arrow W in FIG. 5, FIG. 10 is a partially enlarged view of FIG. 2, FIG. 11 is a front view of the lead wire discharge device 123, and FIG. 12 is a plan view of FIG. 11. , FIG. 13 is a longitudinal sectional view of the winding and unwinding mechanism 128a. 1... Center carrier, 2... Fluid pressure actuator, 3... Head table, 4a and 4b...
...Cutter device, 5...Carrier movement control device,
19...Work table, 20...Printed circuit board,
33...Through hole, 34...Piston rod, 71
a and 71b...movable knife, 72a and 72b...
Fixed knife, 79... Electronic component, 80... Lead wire, 74a and 74b... Cutting hole, 78... Mounting hole, 90... Cutter base movement control device, 10
0...Table rotation control device, 120a and 120
b...Screen device, 121...Lead wire feeder, 123...Lead wire discharge device,
124a and 124b... Screen, 128a and 128b... Winding and unwinding mechanism.

Claims (1)

[Claims] 1. Move the center carrier and piston rod, which are disposed below the printed circuit board so that they can move in two mutually orthogonal directions in a plane parallel to the printed circuit board set on the work table, toward the printed circuit board. a hydraulic actuator mounted on the center carrier so as to be able to project a predetermined stroke and rotate at a predetermined angle with respect to the center line of the piston rod; a head table fixed to the upper end of the piston rod; a fixed knife; a pair of cutter devices having movable knives and mounted on the head table so as to face each other so as to be able to move toward and away from each other; A pair of lead wires of the component is received into a cutting hole penetrated by each fixed knife, and a movable knife acts on the fixed knife to cut the lead wires to a predetermined length and bend them in directions facing each other. In the electronic component mounting apparatus configured, at least a pair of screens are installed between both cutter devices so that a screen for preventing the cut lead wire from scattering can be wound and unwound as the cutter devices move. A lead wire discharging device comprising a screen device and a lead wire feed shoot located below the screen and fixed on the head table so as to connect the feed port to the upper end port of the through hole of the piston rod. An electronic component mounting device characterized by being equipped with.