JPH0231879B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic component mounting device. More specifically, the present invention relates to an apparatus for cutting lead wires of electronic components inserted into mounting holes of a printed circuit board and protruding toward the back side thereof into predetermined lengths and bending them in directions facing each other.

(Prior Art) Various types of electronic component mounting devices have been developed that conventionally cut and bend a pair of lead wires of an electronic component, which are inserted into a mounting hole of a printed circuit board and protrude to the back side thereof, to a predetermined length. As a typical example, Japanese Patent Application Laid-Open No. 184793/1983 discloses a device that bends the material in directions facing each other after cutting.

Specifically, the 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 the piston rod is moved toward the printed circuit board. A hydraulic actuator mounted on the 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, and a fixed knife and a movable knife. A pair of cutter devices are mounted on the head table so that the pairs face each other, and a pair of lead wires of the electronic component inserted into the mounting hole of the board and protruding to the back side thereof are provided. An electronic component mounting device is disclosed that is configured to be received into a cutting hole provided in a fixed knife and to be able to cut and bend the fixed knife to a predetermined length by acting on the fixed knife with a movable knife.

(Problems to be Solved by the Invention) However, in this known mounting device, both cutter devices are mounted so that the pair of fixed knife and movable knife can move in directions facing each other. Moreover, the device configuration was complicated and its operation and operation was troublesome.

That is, in order to receive the lead wire into the cutting hole provided in each fixed knife, both cutter devices must be positioned so that the cutting hole is located on the extension of the lead wire. In the mounting device, since both cutter devices are mounted so as to be movable as described above, the center carrier is moved so that the center of the piston rod of the fluid pressure actuator is located at the midpoint between the pair of lead wires. While performing the control, the rotation of the fluid pressure actuator is controlled to position both cutter devices in the direction of cutting and bending, and the movement of both cutter devices is controlled to adjust the pitch between the cutting holes to the pitch between the pair of lead wires. Therefore, the configuration of the device is complicated, and the operation thereof is also troublesome.

The present invention has focused on the above-mentioned drawbacks of the prior art, and as a result of intensive studies from various aspects in order to improve them, the present invention has been developed by fixing one of the pair of cutter devices to the head table, which simplifies the device configuration and improves operation. They discovered that it could be made easier to operate.

(Means for solving the problem) That is, the electronic component mounting device according to the present invention has the following features:
A center carrier, which is disposed below the printed circuit board set on a work table so that it can move in two mutually orthogonal directions in a plane parallel to the printed circuit board, and a piston rod are projected toward the circuit board by a predetermined stroke. a hydraulic actuator mounted on the carrier so as to 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, and a pair of a fixed knife and a movable knife. A pair of cutter devices are mounted on the head table so as to face each other, and a pair of lead wires of the electronic component inserted into the mounting hole of the board and protruding to the back side thereof are each fixed. In an electronic component mounting device configured to receive a lead wire into a cutting hole provided in a knife and to cut and bend a lead wire to a predetermined length by acting a movable knife against a fixed knife, one cutter device is used. The knife is fixed and the other cutter device is mounted so that it can move only in the direction in which the pairs of knives face each other.

(Example) Hereinafter, to describe more specifically based on the drawings, in FIG. 1 showing a vertical cross-section of the main parts of the electronic component mounting device, 1 is a center carrier, 2 is a fluid pressure actuator, and 3 is a circular shape. head table,
4a and 4b are cutter devices.

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. guide shafts 7a, 7b supported by bearings 6;
A screw shaft 9 supported by a nut 8 attached to the center carrier 1 and one end of the guide shafts 7a and 7b are supported so that they cannot rotate, and one end is supported so that the screw shaft 9 can be rotated. and a driven side carrier 11 which is provided so as to be able to move while being guided by a rail 10, and guide shafts 7a and 7b.
supporting the other end so that it cannot rotate, and supporting the other end so that the screw shaft 9 can rotate;
A drive-side carrier 14 is provided with a nut for supporting the screw shaft 12 and is movable while being guided by a rail 13, and a motor 15 is fixed to the carrier 14 via a suitable bracket. , the output shaft of this motor 15 and the screw shaft 9
and a shaft joint mechanism 18 that connects the screw shaft 12 and the output shaft of the motor 17.

The carrier movement control device 5 configured as described above is mounted inside 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.

Therefore, by driving the motors 15 and 17, the center carrier 1 is moved in two directions, the X1-X2 direction and the Y1-Y2 direction, which are perpendicular to each other in a plane parallel to the printed circuit board 20 set on the work table 19. can be moved.

At this time, the center carrier 1 is moved in the X1-X2 direction together with both carriers 11 and 14 by the drive of the motor 17, and the motor 15
is moved in the Y1-Y2 direction by driving.

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. 33 can rotate together with the housing 31 based on the center line C--C of the piston rod 34 through which the piston rod 33 is passed.

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 not-illustrated nozzle into the cavity 38 formed between the piston head 36 and the cylinder flange 37.

A stopper 39 and a lock nut 40 are screwed onto the lower end of the piston rod 34, and a buffer plate 41 is further 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 which is supported so as to be able to move up and down by a bearing 50 mounted on the center carrier 1, and is attached to the upper end of the piston rod 34 by a shaft. It is fixed by a retaining ring 53,
By controlling the protrusion of the piston rod 34, it is moved up and down parallel to the printed circuit board 20.

Note that four slide shafts 51 are mounted at 90 degree intervals, and the head table 3 is fixed so as not to block the hole 33 of the piston rod 34.

Next, the cutter device 4a moves to the head table 3.
A cutter stand 61 fixed to the top with a bolt 60, a cutter bracket 63 fixed to the stand 61 with a bolt 62, an air cylinder type fluid pressure actuator 65 fixed to the bracket 63 with a bolt 64, A cutter rod 68 screwed onto the piston rod 66 of the actuator 65 and fixed by a nut 67, a movable cutter 69 engaged with the cutter rod 68, a fixed cutter 70 and a cutter guide 71 fixed to the cutter bracket 63. It is made up of.

Note that, as shown enlarged in FIG. 4, the fixed cutter 70 has a cutting hole 74 formed therethrough at its distal end and located on the centerline C-C of the piston rod 34. , and as shown in FIG. 5, which is a view taken in the direction of arrow V in FIG. The cutter rod 68 is inserted into the locking recess 76 provided in the movable cutter 69.
The heads 77 of the two are inserted and engaged with each other.

Therefore, according to this cutter device 4a, the fourth
As shown in the figure, printed circuit board 2
The lead wire 73 of the electronic component 72 inserted into the mounting hole 78 of 0 and protruding to the back side of the cutting hole 7
4, the movable cutter 69 is operated to cut the paper into a predetermined length, and the paper can be bent inward.

That is, the center carrier 1 is moved by the carrier movement control device 5 and positioned so that the cutting hole 74 of the cutter device 4a is located on the extension of the lead wire 73 of the electronic component 72.

Next, the piston rod 34 of the fluid pressure actuator 2 is projected upward toward the printed circuit board 20, and the head table 3 is raised accordingly.
The electronic component 72 is inserted into the cutting hole 74 of the cutter device 4a.
Lead wire 73 is accepted.

In addition, when the lead wire 73 is received into the cutting hole 74 in this manner, the tip of the fixed cutter 70 is located at a position below the back surface of the printed circuit board 20 suitable for cutting and bending. The piston rod 66 of the fluid pressure actuator 65 is protruded, and the movable cutter 69 moves on the fixed cutter 70 to cut the printed circuit board 20.
After cutting the lead wire 73, it can be bent inward.

In this way, in this electronic component mounting device,
Since one cutter device 4a is fixed on the head table 3, the cutting hole 74 of the fixed cutter 70 can be directly positioned with respect to the lead wire 73 of the electronic component 72 by controlling the movement of the center carrier 1. Therefore, positioning can be performed easily and with high precision.

On the other hand, the cutter device 4b includes a pair of cutter stands 81a and 81b fixed to the head table 3 by bolts 80, as shown in FIG. 1 and FIG. 6, which is a right side view of this figure.
is mounted on top.

Specifically, this cutter device 4b includes a cutter base 83 that is engaged with the upper ends of cutter stands 81a and 81b via sliding bearing mechanisms 82a and 82b, and a bolt 85 that is connected to this cutter base 83.
A cutter bracket 84 is fixed to the cutter bracket 84, a hydraulic actuator 65 is fixed to the cutter bracket 84 by a bolt 64, and a cutter rod 68 is screwed to a piston rod 66 of the hydraulic actuator 65 and fixed by a nut 67. A movable cutter 69 is engaged with the cutter rod 68, and a fixed cutter 70 and a cutter guide 71 are fixed to the bracket 84 with bolts 75.

Note that, as shown in FIG. 7, which is a plan view of FIG. 1, this cutter device 4b is aligned with the same center line (X1-X2
line).

Therefore, according to this cutter device 4b, the lead wire 73 of the electronic component 72 can be cut to a predetermined length and bent inward in the same way as the cutter device 4a.

In FIG. 8, the electronic component 72 is shown bent inwardly by the cutter devices 4a and 4b in directions facing each other and attached thereto.

In addition, at this time, one cutter device 4
The pitch between the cutting hole 74 of the cutter device 4b and the cutting hole 74 of the other cutter device 4b is adjusted to be the same as the pitch between the pair of lead wires 73 of the electronic component 72, and the lead wire 73 is received into each hole 74. The pitch adjustment can be performed by moving the other cutter device 4b using the cutter base movement control device 100.

This cutter base movement control device 100, as shown in FIGS. 6 and 7 and FIG. 9, which is a view taken from the W arrow in FIG. A stepping motor 103 is fixed to 102 by bolts (not shown), one end of which is connected to the output shaft of this motor 103 via a shaft coupling 104, and a nut 105 attached to the cutter base 83; It consists of a screw shaft 107 whose other end is supported by a bearing 106 mounted on a bracket 102.

Note that the nut 105 is fixed by a flange 109 that is fixed to the nut support portion of the cutter base 83 with a bolt 108.

Therefore, by driving the stepping motor 103 and rotating the screw shaft 107, the nut 105 is rotated.
The cutter base 83 can be moved in the X1-X2 direction together with the cutter device 4a,
The pitch between the cutting holes 74 of the cutter base 83 can be adjusted to a predetermined value. In this case, the moving distance of the cutter base 83 is controlled by the stepping motor 103.
This is done by counting the pulses emitted by the drive.

In FIG. 7, the stepping motor 10 is shown moved to the maximum in the X2 direction.
3 can be moved in the X1 direction by driving in reverse rotation.

In addition, in this way, the cutter device 4b is
An overrun prevention device is provided to prevent troubles such as the cutter device running out of control and colliding with the fixed cutter device 4a when moving in the direction.

That is, the detection pin 120 shown in FIG. 7 is connected to the hole 12 shown in FIG.
A proximity switch is fixed to a holder 122 that is inserted into the cutter base 83 and fixed to the cutter stand 61 of the cutter device 4a.

Although not shown, this proximity switch is fixed using the hole 123 of the holder 122.

Therefore, when the movable cutter device 4b approaches the fixed cutter device 4a more than a predetermined distance, the pin 120 is detected by the switch, and the stepping motor 103 is activated based on this detection signal. drive is stopped.

Next, in the case where the pair of lead wires 73 of the electronic component 72 arranged in the Y1-Y2 direction perpendicular to the X1-X2 direction in the same plane are cut and bent inward, FIGS. Both cutter devices 4a and 4b are positioned in the Y1-Y2 direction by the table rotation control device 130 shown in FIG. 10, which is an enlarged view of FIG.
This table rotation control device 130 includes a bracket 132 fixed to the center carrier 1 by bolts 131, a stopper 133 screwed to the bracket 132, and an air cylinder type fixed to the bracket 132 by bolts (not shown). a hydraulic actuator 134;
A joint 138 connecting an arm 136 pivotally supported by a flange 135 and a piston rod 137 of the actuator 134, a bracket 140 fixed to the center carrier 1 by a bolt 139, and a stopper 141 screwed to this bracket 140. and an attachment 136 fixed to the flange 135 with bolts 142.

Note that the flange 135 is fixed to the housing 31 with bolts 143, as shown in FIG.

Therefore, by moving the piston rod 137 of the fluid pressure actuator 134 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 can be rotated to position both cutter devices 4a, 4b in the X1-X2 direction or the Y1-Y2 direction.

Note that, at this time, when the piston rod 137 of the fluid pressure actuator 134 is protruded, the attachment 136 moves together with the flange 135 into the tenth position.
The piston rod 137 is rotated to the left in the figure, and the piston rod 137 is projected until it abuts against the stopper 133.

Further, when the piston rod 137 of the fluid pressure actuator 134 is depressed, the attachment 136 is rotated to the right together with the flange 135, and the piston rod 137 is depressed until it abuts against the stopper 141.

In this manner, the attachment 136 is attached to the stopper 1, as shown in FIG.
33, the cutting holes 74 of both cutter devices 4a, 4b are located in the X1-X2 direction, and when in contact with the stopper 141, they are located in the Y1-Y2 direction.

Although not described in detail, the Y1
The lead wire 73 arranged in the -Y2 direction can also be cut and bent inward.

Further, the chips of the lead wires cut by the cutter devices 4a and 4b and falling are collected by a shooter 150 fixed to the upper end of the piston rod 34, as shown in FIG. It is discharged through the through hole 33.

Furthermore, the work table 19 shown in FIG. 3 is swingably attached to a support 152 that is extendably attached to a trolley 151, making it easier for the worker to work. It can be adjusted to an appropriate height and tilted at an appropriate angle.

Note that the printed circuit board 20 is set at a predetermined position on the work table 19 by an operator, and in order to attach the electronic component 72 to the circuit board 20, the center carrier 1 is moved to a predetermined position by the carrier movement control device 5. At this time, head table 3
has been lowered, and when the center carrier 1 is brought to a predetermined position, the hydraulic actuator 2 is activated and the head table 3 is raised.

Furthermore, while the center carrier 1 is being moved, the rotation of the head table 3 and the movement of the cutter device 4b are controlled.

When the head table 3 is raised with the cutting holes 74 of both cutter devices 4a and 4b positioned relative to the pair of lead wires 73 of the electronic component 72, the tube 153 shown in FIG. The light is projected from the tip into the mounting hole 78 of the printed circuit board 20, and the worker confirms this and inserts the lead wire 73 of the selected predetermined electronic component 72 into the specified mounting hole 78.

Next, when the operating pedal 154 is pressed with a foot, the movable cutters 69 of the cutter devices 4a and 4b slide on the fixed cutter 70 toward the substrate 20, cutting and bending the lead wire 73.

After cutting and bending in this manner, the head table 3 is lowered and the center carrier 1 is moved to the next position.

Thereafter, the electronic components 72 can be attached to the printed circuit board 20 one after another in the same manner, but after the printed circuit board 20 is set in a predetermined manner on the work table 19, it is fixed in the same place until all the attachments are completed. It is not moved in the middle.

Further, the tube 153 is fixed to cutter brackets 63 and 84 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). has been done.

(Effects of the Invention) As described in detail above, the pair of lead wires 73 of the electronic component 72 inserted into the mounting hole 78 of the printed circuit board 20 and protruding toward the back side thereof are cut to a predetermined length, and the pair of lead wires 73 are cut into a predetermined length so as to face each other. In the main mounting device that can be bent, one cutter device 4
A is fixed on the head table 3, and the other cutter device 4b is mounted so as to be movable.

Therefore, when positioning the cutting holes 74 of both cutter devices 4a and 4b with respect to the pair of lead wires 73 of the electronic component 72 inserted into the mounting hole 78 of the printed circuit board 20, the movement of the center carrier 1 is controlled. The one cutter device 4a can be directly positioned with high precision, and the one cutter device 4a positioned with high precision in this way can be directly positioned with high precision.
The movement of the other cutter device 4b can be controlled on the basis of this, thereby simplifying the device configuration and facilitating operation.

Incidentally, since one cutter device 4a is fixed so that its cutting hole 74 is located on the center line C-C of the piston rod 34, the device configuration is simplified and the operation operation becomes even more remarkable. be.

[Brief explanation of drawings]

1 to 10 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, FIG. 2 is a view taken along the Z arrow in FIG. A front view showing a schematic configuration, FIG. 4 is a cutter device 4a
5 is a view taken along the V arrow in FIG. 4, FIG. 6 is a right side view of FIG. 1,
FIG. 7 is a plan view of FIG. 1, and FIG. 8 is an electronic component 72.
A vertical cross-sectional view showing the figure attached in an inwardly bent manner.
9 is a view taken along arrow W in FIG. 7, and FIG. 10 is a partially enlarged view of FIG. 2. DESCRIPTION OF SYMBOLS 1... Center carrier, 2... Fluid pressure actuator, 3... Head table, 4a... Fixed side cutter device, 4b... Movable side cutter device, 5... Carrier movement control device, 19... Work table, 20
...Printed circuit board, 34...Piston rod, 69...
Movable knife, 70... Fixed knife, 72... Electronic component, 73... Lead wire, 74... Cutting hole, 78... Mounting hole, 100... Cutter base movement control device, 13
0...Table rotation control device.

Claims (1)

[Scope of Claims] 1. A center carrier disposed below a printed circuit board set on a work table so as to be movable in two directions orthogonal to each other in a plane parallel to the printed circuit board, and a piston rod connected to the printed circuit board. a hydraulic actuator mounted on the carrier so as to be capable of projecting a predetermined stroke toward the piston rod and rotating at a predetermined angle with respect to the center line of the piston rod; and a head table fixed to the upper end of the piston rod. A pair of cutter devices are provided on the head table so that the fixed knife and the movable knife are opposed to each other, and an electronic component inserted into the mounting hole of the board and projected to the back side thereof is provided. Electronic component mounting configured so that a pair of lead wires can be received into cutting holes provided in each fixed knife, and the lead wire can be cut and bent to a predetermined length by acting on the fixed knife with a movable knife. An electronic component mounting device characterized in that one cutter device is fixed and the other cutter device is mounted so that it can move only in a direction in which the pair of knives face each other. . 2. Claim 1, characterized in that one cutter device is fixed so that the cutting hole of the fixed knife is located on the center line of the piston rod.
The electronic component mounting device described in .