JPH06216590A - Automatic axial component insertion device - Google Patents

Abstract

PURPOSE:To reduce noise as an entire device by providing a cam mechanism which is driven by a power source and performs a series operations. CONSTITUTION:The output of a main motor 70 is input to a cam mechanism 82 and the output with a specific waveform is output to outside formers 112A and 112B and driver bars 106A and 106B. An insertion depth modification mechanism is laid out among the cam mechanism 82 and the outside formers 112A and 112B and the drivers 106A and 106B and the down distance of the driver bars 106A and 106B is adjusted according to electronic parts by the insertion depth modification mechanism. Inside formers 130A and 130B are actuated in synchronization with a driver bar via a link mechanism. On the other hand, output is made from the cam mechanism 82 to shear bars 120A and 120B via a torque mechanism G, thus cutting the lead wire of electronic components and hence reducing the noise level of an entire device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axial component automatic insertion apparatus for automatically and continuously mounting axial type electronic components (for example, coaxial components such as resistance elements) on a printed circuit board.

[0002]

2. Description of the Related Art As an automatic axial component insertion device,
For example, US Pat. Nos. 2,896,213 and 3,488.
672 is shown. FIG. 1 shows such a conventional axial component automatic insertion device. As shown in FIG. 1, an XY table 12 which is movable in two orthogonal directions of the base 10 is attached to the base 10. Base 10
A support 14 is provided on the upper part of the support, and the support 14 has a pair of rotatable reels 16.

As shown in FIG. 2, an axial electronic component 1
8 (a resistance element is shown as an axial electronic component in FIG. 2), the end portions 20a and 22a of the lead wires 20 and 22 at both ends thereof are adhered at predetermined intervals by the adhesive tapes 24 and 26, and the electronic component band is formed. Formed as 28.
The electronic component strip 28 is wound on the reel 16, and the electronic component strip 28 wound on the reel 16 is supplied to the insertion tool 30. On the XY table 12, a printed circuit board 32 having a large number of holes for inserting the electronic components 18 formed therein at predetermined intervals is placed, and the insertion tool 30 is one of the electronic component bands 28. Lead wire 2 of electronic component 18
0 and 22 are cut into a predetermined length, and the lead wires 20 and 22 are bent at the insertion interval of the holes of the printed circuit board and inserted into the holes of the printed circuit board.

After that, the portions of the lead wires 20 and 22 projecting downward from the lower surface of the printed board 32 are cut to a predetermined length by the cut and clinch unit 34, and then bent along the lower surface of the printed board 32. In this way, the electronic component 18 is mounted on the printed board 32. In FIG. 1, the base 10 has a microcomputer (not shown) built therein, and the support 14 has a control panel 36. XY table 1
A safety guard pipe 38 is stretched around the circumference of 2.

Further, in the apparatus shown in FIG. 1, two sets of the insertion tool 30 and the reel 16 are provided so that the electronic components 18 can be simultaneously mounted on the two printed circuit boards 32. Tool 30 and reel 16
Is not limited to two sets, and one set or three or more sets may be provided. The structure of the insertion tool 30 is shown in FIG. In FIG. 3, in the electronic component band 28, the lead wires 20 and 22 of the electronic component 18 are engaged with the teeth of the taping component feed gear 40 to be fed. A shear block 42 and a shear bar 44 are provided to cut the lead wires 20 and 22 of the electronic component 18 into a predetermined length, and an inside former 46 and an outside former 46 are provided to bend and hold the lead wires 20 and 22. A mar 48 is provided. A driver end 50 is provided to insert the lead wires 20 and 22 into the printed board 32. These feed gear 40, shear block 4
Two sets of the shear bar 44, the inside former 46, the outside former 48 and the driver end 50 are provided so that they act on both lead wires 20 and 22 at the same time.

FIG. 4 shows a state in which the lead wires 20 and 22 of the electronic component 18 are inserted into the holes of the printed circuit board 32 by the outside former 48 and the driver end 50. FIG. 4 shows a cut and clinch unit 34 that cuts and bends the lead wires 20 and 22 protruding downward from the lower surface of the printed board 32 into a predetermined length. Two sets of the cut and clinch unit 34 are also provided so that they act on both the lead wires 20 and 22 at the same time. The length L indicates the insertion interval of the electronic component 18.

The operation of the insertion tool 30 is shown in FIGS. 5 to 13, the feed gear 4
0, the shear block 42, the shear bar 44, the inside former 46, the outside former 48 and the driver end 50 are symmetrical with respect to the electronic component 18, so only the left one is shown and the right one is omitted. However, the action of the right one is similar to that of the left one.

In FIG. 5, the electronic component 18 is a feed gear 4
0, the lead wire 20 is held by the shear block 42 and the inside former 46, and the electronic component 18 is set. In FIG. 6, the shear bar 44,
Outside former 48 and driver end 50
Integrally move down in the direction of arrow 1000, and the shear block 42 and shear bar 44 cut the lead wire 20 into a predetermined length.

In FIG. 7, the outside former 4
8 and the driver end 50 are integrated into an arrow 100.
It descends in two directions, so that the inside former 4
The lead wire 20 held by 6 is first bent and formed by the outside former 48. In FIG. 8, when the bending of the lead wire 20 is completed, the inside former 46 retracts to the back side of the paper surface. This allows
As shown in FIG. 9, the lead wire 20 of the electronic component 18 is held by the outside former 48 and the driver end 50.

In FIG. 9, the outside former 48 and the driver end 50 are integrally lowered in the direction of arrow 1004 in order to insert the lead wire 20 into the hole 54 of the printed board 32. As shown in FIG. 10, before the lead wire 20 is inserted into the hole 54 of the printed board 32, the cut / clinch unit 34 is raised to the lower surface of the printed board 32.

In FIG. 11, the outside former 48 is stopped and only the driver end 50 is indicated by the arrow 100.
Ascending in six directions, the lead wire 20 passes through the hole 54 of the printed circuit board 32 and enters the hole 58 of the fixed knife 56 of the cutting and clinch unit 34. The cutting and clinch unit 34 includes a fixed knife 56 and a movable knife 60 that can slide on the surface of the fixed knife 56.

In FIG. 12, the movable knife 60 is indicated by an arrow 1.
Moving in the direction 008 to cut the lead wire 20 to a predetermined length, and thereafter, as shown in FIG.
Moves further in the direction of the arrow 1010, and the lead wire 20
Is bent to the lower surface of the printed circuit board 32. The fixed knife 56 and the movable knife 60 are set at an angle of 45 degrees with respect to the vertical direction.

As described above, the electronic component 18 is inserted in the printed board 32. The shear block 42,
The sheer bar 44, the inside former 46, the outside former 48, and the driver end 50 move integrally in the left-right direction of the drawing (directions of arrows 1012 and 1014 in FIG. 6), and similarly, the sheer block and the sheer bar on the right side. , The inside former, the outside former, and the driver end also move integrally in the left-right direction in the drawing, so that the distance between the left and right insertion tools can be increased depending on the insertion interval (interval L in FIG. 4) of the electronic component 18. You can adjust the interval.

[0014]

In the conventional automatic automatic part insertion device as described above, the shear block, the shear bar, the inside former, the outside former, and the driver end, which operate integrally, are generally air cylinders. It is driven by the mechanism. That is, the air cylinder mechanism reciprocates up and down once to perform the above-described series of operations for one pitch. Of the shear bar, the outside former, and the driver end that descend from the top to the bottom, the driver end that pushes electronic components into the printed circuit board needs to maintain a constant descending distance. A metal stopper is provided at the dead center position so that the air cylinder mechanism does not descend beyond the bottom dead center. Normally, to reduce the impact noise,
A rubber bumper was used near the bottom dead center in combination with this stopper, but the impact noise level when the air cylinder mechanism descended was still high. Further, in addition to the air cylinder mechanism, the axial component automatic insertion device has a plurality of noise sources as described below, and the noise of the entire axial component automatic insertion device has been a problem. .

As one of the noise sources, there is a shever and an outside former. In a conventional axial component automatic insertion device, as shown in the above-mentioned US Pat. No. 2,896,213 (in particular, FIGS. 2 and 3), the shear bar and the outside former are respectively retained by a retainer. This retainer was engaged with the driver bar holding the driver end via the ball. In such a ball retaining mechanism, each retainer violently collides with each stopper and driver bar, but since the retainer is heavy, the impact noise when each retainer collides with the stopper and driver bar is considerably large. Was becoming. Furthermore, a high level of noise was generated due to the movement of each ball.

Further, in the conventional automatic automatic parts inserting device, the movement of the inside former between the position where the inside former holds the electronic parts and the position where the inside former retracts to the back side of the paper is the spring force of the spring only from the back side of the paper. Was made to act directly on the inside former. For this reason, the inside former becomes free on the side opposite to the side exerting the spring force of the spring, and the inside former may come into contact with a part of the outside former or the driver end. However, a considerable level of noise was generated, which contributed to the noise of the automatic axial component insertion device. At the same time, the outside former and the driver end directly hit the inside former, which causes a problem that the degree of wear of the inside former is accelerated.

Further, in the conventional automatic automatic component inserting apparatus, the taping component feed gear for continuously supplying electronic components is fed by one pitch by the pawl mechanism engaged with the feed gear. Even in the process in which the feed gear and the pawl mechanism repeatedly engage and disengage at every pitch, a considerable level of noise is generated. The present invention is
It is an object of the present invention to individually reduce the noise generated from each mechanism that constitutes the axial component automatic insertion device as described above and to reduce the noise of the entire device.

[0018]

In order to achieve this object, the axial component automatic insertion apparatus according to the present invention employs a single cam mechanism instead of the air cylinder mechanism. As a result, the impact noise caused by the reciprocating motion of the air cylinder mechanism can be eliminated. Further, this cam mechanism performs the above-described series of operations with a single cam mechanism, and a cam mechanism is provided for each shear bar and shear block, inside former and outside former, driver end, and taping component feed gear. No need.

Further, in the automatic axial component inserting apparatus according to the present invention, a toggle mechanism and a detent mechanism are adopted in place of the above-mentioned ball retaining mechanism which has been a cause of noise generation. The shear mechanism is driven by a toggle mechanism, but as will be described later, this toggle mechanism produces almost no noise. In addition, the detent mechanism is a mechanism that cooperates the outside former and the driver bar that holds the driver end.
With this detent mechanism, the retainer holding the shear bar becomes unnecessary.

Further, in the axial component automatic insertion device according to the present invention, the inside former is driven integrally with the driver bar holding the driver end through a link mechanism instead of the conventional spring. It As a result, it is not necessary to drive the inside former by directly applying the spring to the inside former, and it is possible to suppress the generation of noise and at the same time, to reduce the degree of wear of the inside former. .

Further, in the automatic axial component inserting apparatus according to the present invention, the electronic components are supplied by the Geneva mechanism instead of the conventional feed gear and pawl mechanism. The Geneva mechanism receives the output from the above-mentioned cam mechanism and supplies the axial parts one by one. This makes it possible to eliminate noise caused by the engagement between the feed gear and the pawl mechanism.

[0022]

[Embodiment] FIG. 14 shows an embodiment of an axial component automatic insertion device according to the present invention. First, the outline of the automatic axial component insertion device will be described. The output from the main motor 70 is input to the cam mechanism 82, and the output of a predetermined waveform from the cam mechanism 82 is output to the outside formers 112A and 112A.
B and driver bars 106A and 106B (driver ends 190A and 190B are attached to the tips of the driver bars 106A and 106B as shown in FIG. 22). Cam mechanism 82, outside formers 112A and 112B, and driver bar 10
An insertion depth changing mechanism (an insertion depth changing servomotor 122 or the like) is arranged between the 6A and 106B, and the insertion depth changing mechanism lowers the driver bars 106A and 106B according to electronic components. The distance is adjusted.
The inside formers 130A and 130B are connected to the driver bar via a link mechanism (cam follower 140 or the like), and operate in synchronization with the driver bar. On the other hand, the shear mechanism 120A, 120B is output from the cam mechanism 82 via the toggle mechanism G, and the work of cutting the lead wire of the electronic component is performed.

The details of the automatic axial component insertion device are as follows. The axial component automatic insertion device has a main motor 70 as a drive source, and the main motor 70 is connected to a clutch & brake 76 via timing pulleys 72A, 72B and a timing belt 74. The clutch & brake 76 is the main motor 70
Selectively interrupt the output from.

Further, the clutch & brake 76 is connected to a cam mechanism 82 via timing pulleys 78A, 78B and a timing belt 80, and the main motor 70
The output from the input shaft 82 of the cam mechanism 82
Input to A. A single rotation detection disk 84 is attached coaxially to the timing pulley 78B,
The rotation of the single rotation detection disk 84 is detected by the single rotation detection sensor 86.
It is detected by. When the single-rotation detecting sensor 86 detects that the single-rotation detecting disk 84 has made one revolution, the signal is sent to the clutch & brake 76. In response to this, the clutch & brake 76 releases the clutch and activates the brake, and the timing belt 80
Stop the movement of. After that, when the predetermined time elapses,
The clutch & brake 76 drives the timing belt 80 again to give an input to the input shaft 82A of the cam mechanism 82.
Also in this case, when the single rotation detection disk 84 makes one rotation,
In the same manner as described above, the clutch &
A signal is sent to the brake 76, and the driving of the timing belt 80 is stopped. That is, the input shaft 8 of the cam mechanism 82
2A, main motor 70 to clutch & brake 7
A constant input is given via 6 at regular time intervals.

The cam mechanism 82 is a timing pulley 78B.
As shown in FIG. 15, an output having a shape similar to a sinusoidal curve is made from the output shaft 88 with respect to the input of one rotation of. The output shaft 88 is stopped during the time θ ₁ from the start of input, and then, during the time t, the output shaft 88 is rotated counterclockwise by 45 degrees. In that state, stop for the time θ ₂ ,
Further, during the time t, the output shaft 88 rotates clockwise by 45 degrees and returns to the original position. Then, it again stops for time θ ₁ . The output shaft 88 repeats such a movement for every one rotation of the timing pulley 78B as one cycle.

A lever 90 is fixed to the output shaft 88. The lever 90 is connected to one end of a substantially L-shaped insertion depth varying lever 94 via a connecting rod 92 whose length can be freely adjusted. It is pivotally connected. The other end of the insertion depth varying lever 94 is pivotally connected to a lever 98 via a connecting rod 96 whose length can be freely adjusted.

The lever 98 has a driver bar 106.
A main shaft 102 extending to both sides from a main lever 100 supporting A and 106B is fixed. As shown in FIG. 14, the main lever 100 has two arms extending in a separated state, and a rod 104 is supported between the tips of the arms. At the upper ends of the driver bars 106A and 106B, a rectangular recess 108 is formed.
Each of the guides 110 formed with is fixedly attached, and the recess 108 is fitted into the rod 104, so that the driver bars 106A and 106B are not fixed to the rod 104 but are rotatable. It is supported. By supporting in this way, the main lever 1
It becomes possible to convert the pivotal movement of 00 to the vertical movement of the driver bars 106A and 106B.

A pair of driver bars 106A and 106B
The outside formers 112A and 112B are arranged adjacent to the driver bars 106A and 106B on the front side (that is, the front side of the automatic axial component insertion device; the left side in FIG. 22). As shown in FIG. 16, the driver bars 106A and 106B and the outside formers 112A and 112B cooperate with each other to descend and rise, which will be described later.

The insertion depth when the driver bars 106A and 106B push the electronic parts into the printed circuit board can be adjusted by adjusting the descending distance of the driver bars 106A and 106B. Driver bar 106
The descending distance of A and 106B is adjusted by adjusting the pivot angle of the main lever 100. The pivot angle of the main lever 100 is adjusted by the insertion depth changing servomotor 122. Servo motor 1 for changing the insertion depth
The output shaft 122a of 22 is connected to an eccentric rod 128 via a speed reducer 124 and a coupling 126. The eccentric rod 128 is the output shaft 122a of the servomotor 122.
A coaxial rod portion 128a coaxial with the servo motor 12
Eccentric rod portion 128 which is eccentric with respect to the second output shaft 122a, that is, with respect to the coaxial rod portion 128a.
b. Eccentric rod portion 12 of eccentric rod 128
8b is fixedly fitted in the opening 94a of the lever 94 for varying the insertion depth.

When the servomotor 122 rotates the eccentric rod 128 according to the insertion depth of the electronic component, the insertion depth varying lever 94 rotates in response to the rotation of the eccentric rod 128 by a minute angle.
As a result, the descending distance of the driver bars 106A and 106B is adjusted. The other end of the main shaft 102 extending from the main lever 100 is connected to one end of a shaft 116 extending on both sides of the shear bar lever 114 via a toggle mechanism G (which will be described later). Like the main lever 100, the shear lever 114 has two arms that extend in a spaced apart manner, and a rod 118 is supported between the tips of the arms.

Rectangular recesses 122 are formed at the upper ends of the pair of shear bars 120A and 120B, and the recesses 122 are fitted into the rod 118. As a result, the shear bars 120A, 120B are rotatably supported with respect to the rod 118, so that the pivotal movement of the shear bar lever 114 is controlled by the shear bars 120A, 120B.
It becomes possible to convert it into a vertical motion of 0B.

As shown in FIG. 14, the inside formers 130A and 130B are attached to one end of a substantially inverted L-shaped base 132, and the other end of the base 132 is pivoted to a lever 136 via a connecting rod 134. Connected freely. A groove 138 extending in the vertical direction is provided on the left and right side surfaces of the pair of driver bars 106A and 106B, and a cam follower 140 attached to the tip of the lever 136 is movably engaged with the groove 138.

As shown in FIG. 22, the lever 136 is pivotally supported on the shaft 142 at substantially the center thereof, and is rotatable around the shaft 142. The groove 138 formed in the driver bars 106A and 106B is located at a portion 138a having a relatively short horizontal distance from the axial center of the shaft 142 and at a position above the portion 138a and having a horizontal distance from the axial center of the shaft 142. 138
It is composed of two parts, a part 138b slightly longer than a.

When the driver bars 106A and 106B are still located above, that is, the shear bar 120
When A and 120B are cutting the lead wire of the electronic component, the cam follower 140 is engaged in the portion 138a of the groove 138 and the inside former 130A,
130B is at the position shown in FIG.
0A and 120B support the electronic component at the position where the lead wire of the electronic component is cut.

The driver bars 106A and 106B are shown in FIG.
When the descent from the position shown in 2 is started, that is, when the cutting of the lead wire of the electronic component by the shear bars 120A and 120B is completed and the lead wire is bent and inserted into the printed board, the driver bar 106 is reached.
With the lowering of A and 106B, the cam follower 140 moves from the portion 138a of the groove 138 to the portion 138b. Since the portion 138b of the groove 138 has a longer horizontal distance from the axis of the shaft 142 than the portion 138a, when the cam follower 140 moves to the portion 138b, the lever 136 is moved.
Rotates counterclockwise about the axis of the shaft 142. Along with this, inside formers 130A, 1
30B also retreats to the position indicated by the broken line. After this, the driver bars 106A and 106B descend and push the electronic components into the printed circuit board.

The input shaft 82A of the cam mechanism 82 is the shaft 1
The shaft 144 is directly connected to the shaft 44, and a Geneva gear disk 146 is attached to the end of the shaft 144. Figure 2
As shown in FIG. 5, an annular wall 148 is formed concentrically with the disk 146 on the outer surface of the disk 146 for Geneva gear. A part of the annular wall 148 is notched, and a cam follower 150 is arranged outside the notched end 148a.

The Geneva gear disk 146 is engaged with the Geneva gear 152. The Geneva gear 152 is shown in FIG.
As shown in FIG. 5, four slots 154 are formed diametrically up to the peripheral surface 156 in two directions orthogonal to each other.
An arcuate peripheral surface 156 is formed between the slots 154. When the Geneva gear disk 146 rotates, the arcuate peripheral surface 156 of the Geneva gear 152 slides while contacting the annular wall 148 of the Geneva gear disk 146, and
The cam follower 150 is a disk 146 for Geneva gear.
With the rotation of, the slot 154 of the Geneva gear 152 enters. That is, when the Geneva gear disk 146 makes one rotation, the Gene Follower gear 152 rotates 90 degrees while the cam follower 150 engages with the slot 154. After the Geneva gear 152 rotates 90 degrees, the cam follower 15
0 goes out of the slot 154, and when the Geneva gear disk 146 makes one revolution again, enters into the adjacent slot 154 and repeats the same operation.

The Geneva gear 152 is the timing belt 15
It is connected to the pulley 159A via 8A. Pulley 1
59A is a housing 160 surrounding a pair of left and right insertion tools
It is attached to one end of a shaft 161 that is supported by penetrating through it. A pulley 15 is provided at both ends of the shaft 161.
9B is attached, and each timing belt 15
It is connected to the pulley 159C via 8B. Each pulley 159C is attached to one end of a pair of shafts 162 pivotally supported by the housing 160. As shown in FIG. 26, the pair of shafts 162 includes the housing 160.
Are supported coaxially with a space in the center. At the other end of the pair of shafts 162, a pair of axial component feed gears 164A and 164B are supported.
Each of the pulleys 159A, 159B and 159C is provided with feed gears 164A and 16A every time the Geneva gear 152 rotates 90 degrees.
It is selected to rotate 4B by one pitch. Figure 2
As shown in FIG. 7, this pair of feed gears 164A, 16A
4B is engaged with an electronic component band in which axial components 194 are taped at both ends with adhesive tapes 196, and each time the feed gears 164A, 164B advance one pitch, one axial component 194 in the electronic component band is fed. To be That is, every time the shaft 144 rotates once, the Geneva gear 152 rotates 90 degrees, and in each case, the feed gear 1
64A, 164B advance 1 pitch, axial parts 19
One 4 is sent.

In this embodiment, the Geneva gear 1
Although 52 is described as having four slots in two directions orthogonal to each other, it is possible to use a Geneva gear having a plurality of slots extending in the same circumferential angular direction depending on the timing. . 28 and 29 show details of the toggle mechanism G. Driver bars 106A, 106B and outside former 112
Main lever 100 with A and 112B attached
A first lever 170 is fixedly attached to one end of the main shaft 102 that drives the.
On the other hand, the shaft 11 that drives the shear bar lever 114 to which the shear bars 120A and 120B are attached.
A second lever 172 is fixedly attached to one end of the second lever 172, and a third lever 174 is pivotally attached to the other end of the second lever 172.
The first lever 170 and the third lever 174 are pivotally connected to each other at a pivot point 178 via a connecting rod 176 whose length is freely adjustable.

Further, a fourth lever 182 is rotatably attached to the frame 180 of the automatic axial component inserting apparatus, and the fourth lever 182 also has a pivot point 178.
At, the third lever 174 and the connecting rod 176 are pivotally connected. The toggle mechanism G is constituted by these four levers and the connecting rod. Main shaft 1
A straight line extending from the shaft center of 02 to the connecting point 170a between the first lever 170 and the connecting rod 176 is X ₁ , and a straight line extending from the shaft center of the shaft 116 to the connecting point 172a between the second lever 172 and the third lever 174 is X. ₂ means pivot point 17
The straight line distance from 8 to the straight line X ₂ is set to be shorter than the straight line distance to the straight line X ₁ . Therefore, the rotational force of the main shaft 102 is amplified and transmitted to the shaft 116 according to the ratio of the linear distance from the pivot point 178 to the straight lines X ₁ and X ₂ .

At the same time, by adjusting the length of the connecting rod 176, it is possible to set the timing for lowering the shear bars 120A, 120B earlier than the outside formers 112A, 112B and the driver bars 106A, 106B. Note that FIG. 31 shows the relationship of movement of each component by the toggle mechanism. 16 to 20, outside formers 112A and 11A are shown.
2B and the driver bars 106A and 106B cooperate with each other to descend. (Hereinafter, only the outside former 112A and the driver bar 106A will be described. The same applies to the outside former 112B and the driver bar 106B. Is).

A driver bar 106A and a block 184A are adjacent to each other on both sides of the outside former 112A, and are slidably arranged between them. The outside former 112A has projecting ends 185a and 185b projecting above the driver bar 106A and the block 184A at the upper end thereof. The outside former 112A is formed with a through hole 188 into which the detent 186 can be slidably fitted in the left-right direction.

As shown in FIG. 20, the detent 186 has an octagonal shape that is flat in the vertical direction, and is composed of a trapezoidal portion f on the left side, a square portion g in the center, and a trapezoidal portion h on the right side. The left and right trapezoidal portions f and h have the same length. The length of the through hole 188 is equal to the sum of the lengths of the trapezoidal portion f and the central portion g (g + f or g + h). The block 184A and the driver bar 106A have triangular notches 21 on the side in contact with the outside former 112A.
2, 210 are formed respectively. These triangular notches 212 and 210 are set to dimensions such that the left and right trapezoidal portions f and h of the detent 186 can be fitted to each other.

Block 184A and driver bar 10
At the upper end of 6A, a stopper 214 made of urethane rubber,
216 are provided respectively. The outside former 112A and the driver bar 106A are initially shown in FIG.
As shown in FIG. 3, the stopper 216 at the upper end of the driver bar 106A is attached to the protruding end 1 of the outside former 112A.
85a in contact with the block 184A
Is located above. Note that block 184A
Is fixedly installed, and the outside former 112A and the driver bar 106A are attached to the block 18
Moves up and down with respect to 4A. In this state, the stopper 21
4 and the distance S ₂ between the distance S ₁ between the through hole 188 and the cut blocks 184A-outs 212 between the projecting end 185b is set to be equal.

From this state, the outside former 11
2A and the driver bar 106A start descending at the same time. As shown in FIG. 17, the outside former 11
2A descends by a distance S ₁ , and the protruding end 185b is attached to the stopper 214 attached to the upper end of the block 184A.
When it comes into contact with the outside former 112A, the distance S ₁ and the distance S ₂ are set equal to each other.
Through-holes 188 of the holes are aligned with the notches 212 of the block 184A. Since the outside former 112A is in contact with the stopper 214, it does not descend further, but
Since the driver bar 106A still tries to descend, the force of the driver bar 106A to descend acts on the upper side of the trapezoidal portion h of the detent 186. Due to this force, the detent 186 slides leftward inside the through hole 188, and the trapezoidal portion f of the detent 186 fits into the notch 212 of the block 184A. That is, the detent 186 as a whole includes the cutout 21 of the block 184.
2 and the through hole 188, the engagement between the outside former 112A and the driver bar 106A is released. Therefore, FIG.
As shown in FIG. 7, after the outside former 112A contacts the stopper 214, only the driver bar 106A descends.

When the driver bar 106A finishes the work (the work of inserting the axial parts into the printed board), it rises again and, as shown in FIG. 18, the driver bar 106A.
The stopper 216 attached to the upper end of A contacts the protruding end 185a of the outside former 112A. At the same time, the through hole 188 of the outside former 112A is aligned with the notch 210 of the driver bar 106A.

After this, the outside former 112A
And the driver bar 106A rise together. When the outside former 112A tries to rise, an upward force acts on the lower side of the trapezoidal part f of the detent 186 fitted in the through hole 188 and the notch 212 of the block 184A, whereby the detent 186 penetrates. Hole 18
The inside of 8 slides to the right, and the trapezoidal portion h of the detent 186 fits into the notch 210 of the driver bar 106A. As a result, the detent 186 comes out of the notch 212 and is located only inside the through hole 188 and the notch 210. By moving the detent 186 to the right, as shown in FIG. 19, the outside former 112A and the driver bar 106A are brought into an engaged state via the detent 186, and both are raised.

FIG. 21 is a front view of only the left half of the axial component automatic insertion device. As shown in FIG. 21, the driver bar 106B (see FIG.
2), the driver end 190B attached to
Outside former 112B, Shaver 120B
Are arranged side by side. Below these, an axial component 194 supported by the inside former 130B and the shear block 192B is supported. As described above, the axial component 194 is supplied by the above-described axial component feed gears 164A and 164B as an electronic component band whose both ends are fixed by the tape 196.

As shown in FIG. 24, the driver bar 10
6A, the outside former 112A and the shear bar 120A, and the driver bar 106B, the outside former 112B and the shear bar 120B are integrally attached to the blocks 198A and 198B, respectively, and the blocks 198A and 198B slide along the shaft 142. It is provided to be movable. The blocks 198A and 198B have L-shaped brackets 200A,
200B is attached to each bracket 20
0A and 200B are fixed to blocks 202A and 202B. The blocks 202A and 202B are attached to the ball screw shaft 204, respectively. The blocks 202A and 202B are respectively provided with a left-hand screw and a right-hand screw, and when the ball screw shaft 204 rotates forward, the blocks 202A and 202B move toward each other, and when the ball screw shaft 204 rotates backward, The blocks 202A and 202B move away from each other.

The ball screw shaft 204 rotates in the normal or reverse direction according to the insertion width of the axial component 194 (interval L shown in FIG. 4) to adjust the positions of the driver bar, outside former, shear bar and shear block. Next, the outline of the operation of the present axial component automatic insertion device having the above-described configuration will be described.

When the clutch & brake 76 operates the clutch, the output of the main motor 70 is input to the cam mechanism 82 via the clutch & brake 76. In response to this input, the cam mechanism 82 outputs as shown in FIG. First, the cam mechanism 82 does not output during the constant time θ ₁ , but outputs a sinusoidal curve during the subsequent time t. In response, the output shaft 88 rotates the lever 90 counterclockwise by 45 degrees. The cam mechanism 82 does not perform the output again for the fixed time θ ₂ after the time t at which the output is performed.

First, the shear lever 114 is pivoted by the output during the time t, and the shear bar 120 is rotated.
A and 120B descend. As a result, the lead wire of the axial component 194 is cut. Then, the main lever 100 pivots to move the outside formers 112A, 1A.
12B descends, inside formers 130A, 13
The lead wire is bent in cooperation with OB. After bending the lead wire, the inside former 1
30A and 130B retract from the position indicated by the solid line in FIG. 22 to the position indicated by the broken line. After this, the driver bars 106A and 106B having the driver ends attached to the tips descend, and the axial component 194 is inserted into the printed board.

Furthermore, during the time θ _{2 when} the output from the cam mechanism 82 is 0, the lead wire extending below the printed circuit board is cut and bent by the cut / clinch unit. Then, the cam mechanism 82 outputs again only for the time t, and in response thereto, the output shaft 88 rotates the lever 90 clockwise by 45 degrees. By this output, the driver bars 106A and 106B, the outside formers 112A and 112B, and the shear bar 120.
A and 120B rise and return to the initial position.

Immediately before these return to their original positions,
The XY table moves to place the next axial part at the insertion position. The insertion width is adjusted by rotating the ball screw shaft 204 simultaneously with the movement of the XY table, and the insertion depth is adjusted by operating the insertion depth changing servomotor 122. At this point, 3/4 (270 degrees) of one cycle (360 degrees) of the input shaft of the cam mechanism 82 is completed, and the Geneva gear 15
2 rotates 90 degrees, and the feed gears 164A and 164B feed the next axial component.

At this point, the single-rotation detecting disk 84 completes one rotation, and the single-rotation detecting sensor 86 detects it, so that the brake of the clutch & brake 76 is activated and the cam mechanism 82 is completely stopped. To do. In this case, since the output shaft stops at zero speed, there is almost no impact due to the stop and the accompanying impact noise. In this way, one cycle is completed, and this is repeated thereafter.

[0056]

In the automatic axial component inserting apparatus according to the present invention, the cam mechanism is adopted as the drive source instead of the air cylinder mechanism. Therefore, the impact sound generated by the air cylinder mechanism can be eliminated, and the noise of the entire device can be reduced. Furthermore, with the air cylinder mechanism, it is unavoidable that a certain amount of time is required for the reciprocating motion of the cylinder, but the adoption of the cam mechanism makes it possible to insert electronic components faster than the air cylinder mechanism. .

In particular, in the present invention, one cam mechanism is used to perform a series of operations from the placement of the axial component at a predetermined position to the cutting, bending and insertion of the lead wire. Although a structure in which a cam mechanism is provided for each mechanism of the shear bar, outside former, and driver bar is conceivable, such a structure makes it difficult to accurately synchronize the operation of each mechanism and requires a large space. And In this respect, the axial component automatic insertion device of the present invention avoids such a problem by providing a single cam mechanism.

In addition, in the axial component automatic insertion device according to the present invention, instead of the ball retaining mechanism,
It uses a toggle mechanism and a detent mechanism. This eliminates noise caused by contact between the ball and the retainer, eliminates the need for the retainer, avoids an increase in the weight of the vertically moving portion of the insertion tool, and reduces impact noise.

Further, since the inside former is driven by the link mechanism, noise can be reduced as compared with the conventional drive by the spring, and since there is no contact with the outside former or the driver end, the inside former is It is also possible to reduce the degree of wear of the mer. Furthermore, the Geneva mechanism can also reduce noise more than the conventional feed gear and pawl mechanism.

As described above, by using the cam mechanism, the toggle mechanism, the detent mechanism, the link mechanism and the Geneva mechanism, it is possible to lower the noise level of the entire axial component automatic insertion device as compared with the conventional device.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional axial component automatic insertion device.

FIG. 2 is a plan view of an electronic component band in which a plurality of axial components are aligned and taped with an adhesive tape.

FIG. 3 is an external view of the insertion tool as viewed from below.

FIG. 4 is a cross-sectional view showing a state in which a lead wire of an electronic component is inserted into a hole of a printed board by an outside former and a driver end.

FIG. 5 is an explanatory diagram showing the operation of the insertion tool.

FIG. 6 is an explanatory diagram showing the operation of the insertion tool.

FIG. 7 is an explanatory diagram showing the operation of the insertion tool.

FIG. 8 is an explanatory diagram showing the operation of the insertion tool.

FIG. 9 is an explanatory diagram showing the operation of the insertion tool.

FIG. 10 is an explanatory diagram showing the operation of the insertion tool.

FIG. 11 is an explanatory diagram showing the operation of the insertion tool.

FIG. 12 is an explanatory diagram showing the operation of the insertion tool.

FIG. 13 is an explanatory diagram showing the operation of the insertion tool.

FIG. 14 is an exploded view of an embodiment of the automatic axial component insertion device according to the present invention.

FIG. 15 is an output waveform diagram of the cam mechanism.

FIG. 16 is an explanatory diagram showing a state in which the outside former and the driver bar work together.

FIG. 17 is an explanatory diagram showing a state in which the outside former and the driver bar work together.

FIG. 18 is an explanatory diagram showing a state in which the outside former and the driver bar work together.

FIG. 19 is an explanatory diagram showing a state in which the outside former and the driver bar work together.

FIG. 20 is a perspective view of a detent.

FIG. 21 is a front view of an insertion tool including a shear bar, an outside former, a driver bar and the like.

22 is a side view of FIG. 21. FIG.

FIG. 23 is a rear view of FIG. 21.

FIG. 24 is a plan view seen from above in FIG. 21.

FIG. 25 is a plan view of a Geneva gear.

FIG. 26 is a side view of FIG. 25.

FIG. 27 is a perspective view of an axial component feed gear.

FIG. 28 is a front view of the toggle mechanism.

FIG. 29 is a plan view from above in FIG. 28.

FIG. 30 is a front view showing the relationship between the toggle mechanism and the insertion tool of the automatic axial component insertion device.

FIG. 31 is a schematic view showing the operation of the toggle mechanism.

[Explanation of symbols]

 70 Main Motor 76 Clutch & Brake 82 Cam Mechanism 88 Output Shaft 94 Insertion Depth Adjusting Lever 100 Main Lever 102 Main Shaft 106A, 106B Driver Bar 112A, 112B Outside Former 114 Shaver Lever 116 Shaft 120A, 120B Shear Bar 122 Insert Depth changing servo motor 128 Eccentric rod 130A, 130B Inside former 140 Cam follower 146 Geneva gear disc 148 Annular wall 150 Cam follower 152 Geneva gear 164A, 164B Axial component feed gear 186 Detent 188 Through hole 190A, 190A 192 Driver end 192B Shear block 194 Axial parts 204 Ball screw shaft

Claims (7)

[Claims] 1. A lead wire of an aligned axial electronic component is cut into a predetermined length, and the lead wire is bent,
An axial component automatic insertion device for sequentially inserting axial type electronic components into a printed circuit board, comprising a power source and one cam mechanism that is driven by the power source and performs the series of operations described above. Insertion device. 2. A lead wire cutting mechanism for inputting an output of the cam mechanism through a toggle mechanism to cut the lead wire of the axial type electronic component to a predetermined length. Automatic part automatic insertion device described. 3. The mechanism for bending a lead wire of the axial type electronic component and the mechanism for inserting the axial type electronic component into a printed circuit board cooperate with each other via a detent mechanism. Axial component automatic insertion device described in. 4. The detent mechanism includes a through hole provided in a mechanism for bending a lead wire of the axial electronic component, and the axial electronic component disposed on both sides of the bending mechanism on a printed circuit board. A notch formed in each of the inserting mechanism and the fixed block, and having both ends that are slidable inside the through hole and that can be engaged with the notch, and the total length is the same as the length of the through hole. The axial component automatic insertion device according to claim 3, further comprising a detent equal to the sum of the lengths of the notches. 5. The lead wire cutting mechanism and the mechanism for inserting the axial type electronic component into a printed circuit board cooperate with each other via a link mechanism. Axial component automatic insertion device. 6. The automatic axial component insertion device according to claim 1, further comprising a Geneva mechanism that receives the output from the cam mechanism and supplies the axial components one by one. . 7. The Geneva mechanism includes a disc attached to one end of an input shaft, an annular wall formed on the disc and partially having a notch, and facing the end of the notch. A cam follower arranged on the outer side of the annular wall and a plurality of slots extending to the outer circumference in an equal circumferential angle direction are formed, and the outer circumference between the slots is a circle slidable in contact with the annular wall. The automatic part automatic insertion device according to claim 6, further comprising a Geneva gear formed in an arc shape.