JPS58182300A - Automatic wire blank inserting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves supplying a predetermined amount of a partially soldered continuous material, shaping and cutting it, and then positioning the formed and cut wire material at a predetermined position on a printed circuit board. This invention relates to an automatic wire insertion machine for inserting wire rods into machines.

In general, in jumper wires, the portions that are not inserted into the printed circuit board are covered with insulation, and the portions that are inserted into the printed circuit board are soldered, so they are made of a material that is suitable for soldering.

As shown in Fig. 1 and Fig. 2, in which this high jumper wire is inserted into the printed circuit board, in order to have a stray capacitance between the high jumper wire 200,
It must be inserted by floating at a certain height from 02.

Conventionally, there was no device to automatically insert this type of jumper wire, and the jumper wires were inserted manually, which made it impossible to meet the high-speed insertion tact required for mass production. Ta.

As shown in FIG. 3, the general jumper wire 201 does not require an insulating part because it can be connected from point to point and can be brought into close contact with the printed circuit board 202. Therefore, it is sufficient to use a wire with good solderability and a conductive material layer formed on the surface, cut it to a certain length, bend both ends, and insert it into the printed circuit board. In order to automate this, devices such as those shown in Figures 4 and 6 were used. This conventional jumper wire insertion machine will be explained.

In Fig. 6, 1 is a line holder, and this line holder 1
The hoop-shaped covered jumper wire 2 set in the wire passes through the guide 3, enters the strainer part 4 from the tension part 3, removes the bend in the covered jumper wire, and reaches the insertion part 6 by the wire feeding part 6. , where it is cut to size,
Stripped, formed and inserted.

This conventional device could not insert the high fist jumper wire because it was not equipped with a supply unit that could supply a constant pinch of wire without detecting continuity.

The present invention is equipped with a continuity detection function in the wire feeding section, and can feed the wire in a manner that absorbs variations and errors in the soldering process of high jumper wires. Therefore, it is possible to automate the process up to the insertion into the printed circuit board. An embodiment of the present invention will be described below with reference to FIGS. 6 to 21.

7 is a bobbin around which the original wire 7a is wound, and this bobbin 7
The raw wire 7a is drawn out from the feeder and transported out by the supply reel 8. Reference numeral 9 denotes a tension lever, which is provided between the supply reel 8 and the bobby/7, and has the function of applying a constant tension to the raw wire 7a by coming into contact with it.

1o is a soldering device, which solders the raw wire 7a carried out from the bobbin 7 at a constant pitch, advances it a constant length by a wire constant pitch feeding device 11, and transfers it to a winding position regulating reel 1.
In step 2, the position is adjusted so that the winding can be properly wound onto the winding bobbin 13.

13 is a bobbin, 14 is a wire supply unit, 15 is a cam 1
6 is a wire forming unit that moves up and down, 17 is a cutter unit, and 18 is an "X-Y table" that can freely move the printed circuit board 19 back and forth and left and right.

In the above configuration, soldering is performed by feeding the polyurethane coated wire in one direction from the supply reel 8 to the device 10 using the constant pitch supply device 11, heating it to a predetermined temperature, and adjusting the solder spout width, solder flow rate, and wire supply side tension.

The wire feed pitch, winding torque, solder jet timing, etc. are adjusted to perform soldering at a constant width and pitch, and then the wire is wound onto a bobbin 13 via a winding position regulating reel 12.

Next, the soldered wire is fed from one direction by the wire supply unit 14, the wire is shaped by the vertical movement of the forming unit 16 by the cam 16, and the cutter unit 17
is cut and held, moved to the top of the substrate 19, and inserted. The substrate 19 is moved back and forth and left and right by the x-y table 18.

The above is an overview of this automatic wire rod insertion machine, and each part will be explained in detail below.

In FIG. 9, 24 is a chuck member, and a fulcrum 26
The tip portion 24a has a wedge shape, and the rear end is provided with a U-shaped groove 24b. 24c is a bottle, which is connected to the rotary solenoid 23 and the U-shaped # of the wedge-shaped rod.
124b are securely coupled to each other.

In this configuration, the wire rod 2o is sandwiched between a wedge-shaped rod 24 and a chucking base 27, and the wedge-shaped rod 24 is pushed in one direction by a certain length with a cylinder 26 whose stroke is longer than the wire feed pitch P. When the rotary lean lenoid 23 rotates, the wedge-shaped rod 24 draws an arc and moves away from the wire 2°, releasing the wire from being held.

Figure 10 shows the conduction detection section of the wire, with the contact 28 and the base 2.
9, and conduction is detected at the solder part 20a of the wire 2o.
The N signal is generated as an OFF signal in areas other than the solder area. FIG. 11 shows the above signal. Since the rotary solenoid 23 is rotated at the falling edge of this signal, the holding of the wire is released as described above. Since point A is the trailing edge of the signal, the rotary renoid 23 rotates while the wire 2o is fed in the C direction by the feed pitch p, that is, up to point B, and the wedge-shaped rod 24 is moved from the wire 20. When the wire rod 20 is separated, the feeding of the wire rod 20 is stopped. In this way, the stroke of the cylinder 26 is set longer than the feeding rib notch p of the wire rod 20, and the soldering pitch p of the wire rod is set to feed the wire rod 20 while detecting the boundary of the solder portion 20a.
Intermittent feeding of the wire rod is possible while absorbing the variations in the wire rod.

Next, the cutter unit will be explained.

In FIGS. 11 to 14, reference numeral 31 denotes a cutter unit body constituting a cylinder 32, in which a piston 34 having a molded piece 33 at the tip is housed via a compression spring 36. A pair of U or 7-shaped grooves 36 are provided inside the tip of the molding element 33 in correspondence with the insertion pitch of the printed circuit board 19 and along the horizontal center line W-W.
Further inside the piston 34, a pusher 38 having a rod 37 at the rear that slides through the piston 34 is connected to a compression spring 39.
It abuts and is locked to the stopper 40 of the molding element 33 via. Further, a concave groove is provided on the outer side of the tip of the molding element 33, into which the male blade 41 is slid.

42 is a female blade fixed to the cutter unit main body 31;
The above-mentioned male blade 41 is held between the molding element 33 and each of them forms a pair of cutters. As shown in the figure, the ○43 is inscribed in the central hole of the male blade 41 and also in the outer concave groove of the molding element 33. A ball in a hole with a partially concave spherical surface (
The holding lever 044, which normally connects the molding element 33 and the male blade 41, is a holding lever, which is fixed to an arm shaft 46 which is pivotally supported by the cutter main body 31 and has an arm at one end, and which holds the compression spring 46. The cutter unit body 31 is in contact with the bottom of the cutter unit body 31 through the cutter unit body 31 . Further, a pin 48 that pivotally supports a roller 47 is attached to this arm.

The structure of the cutter unit 17 has been described above, and its operation will be explained next. At the wire cutting position, the supplied wire is set to be centered between the male and female blades.

In this state, if air is sent to the cylinder 32 via the air supply hose 49, the piston 34 and molded element 33
moves forward. At the same time, the pusher 38 inscribed in the molded member 33 is connected by a compression spring 39, and the male blade 41 is connected by a ball 43, so that they move forward together.

Eventually, the wire will be held between the tip of the pusher 38 and the holding lever 44, but the structure is such that the force of the compression spring 6o of 44 overcomes the force of the compression spring 39. Therefore, the pusher 38 stops in this state.

Next, the gap between the male blade 41 and the female blade 42 becomes zero and the wire is cut, and the stepped part 61 of the male blade 41 connects to the locking part 62 of the female blade 42.
Move forward until you hit. At this position, the ball 43 is configured to escape into the partially spherical hole 53 provided in the female blade 42, so the connection between the male blade 41 of the molded piece 33 is released, and only the molded piece 33 and the piston 34 are connected to the cylinder. Move forward until you reach the end.

The wire rod cut during this time is bent by the holding lever 44 and guided to the guide 36 of the molding element 33.

As described above, the canter unit 17 can cut and bend a wire of a fixed size from the supplied wire by sending air and hold the wire in a bent state.

Further, when inserting (described later), if the arm 46 is rotated in the direction of arrow C, the sandwiched state between the pusher 38 and the holding lever 44 is released, and the pusher 38 advances forward by the compression spring 39 and pushes out the formed wire. Main body 3
1, and is fastened to a pinion shaft 57 (described later) of an insertion shaft 66 (described later) with a screw 66 through a mounting hole provided at the top of the pinion shaft 66 (described later).

Next, the structure of the insertion head portion 58a will be explained with reference to FIGS. 14 to 18.

Reference numeral 56 denotes an insertion shaft forming the insertion head, which is pivotally supported by the insertion head main body 58 so as to be vertically slidable.

Reference numeral 69 designates a drive shaft whose shaft portion is pivotally supported in an inner hole of the insertion shaft 66 so as to be vertically slidable, and reference numeral 60 designates an adjustment nut attached to the central threaded portion of the insertion shaft 66. 61 is a compression spring interposed between the insertion head main body 68 and the adjustment nut 60. The insertion shaft 66 is pressed squarely by the compression spring 61, but is locked by the stepped portion 62 of the drive shaft 69.

63 is a spherical bearing attached to the tip of the helad arm 64,
Connect the inner race 66 of this spherical bearing 63 with a nut 66.
67 connects the drive shaft 68 and helad arm 64 to the cutter unit body 3.
This is the pinion shaft that rotates the motor. Reference numeral 68 denotes a flange that pivotally supports the shaft portion of the pinion shaft 67, and is a cloth at the tip of the insertion shaft 66.

Make up the left part.

69 is a slide rack that engages with the pinion shaft 67, 7o is a sliding groove on which the slide rack 69 slides, and 64 is a compression spring interposed between the inside of the slide rack 69 and the bracket 88, which keeps the slide rack 69 upward at all times. Push up so that it always contacts the lower surface 71 of the head main body 58, and insert the insertion shaft 66.
It makes up the right tip of the.

72 is a slider that slides in the groove 73 of the flange 68 of the insertion shaft 66, and slides through the stepped portion 6 of the drive shaft 59 via the pin 74.
It is connected to 2.

This slider 72 includes a regulating block 76 that regulates the looseness of the cutter unit main body 17 during insertion (described later), and an arm 46 of a holding lever 44 that releases the wire from being clamped.
A release cam 76 is attached to rotate the cam in the direction of arrow C. 77 is a regulating lever attached to the shaft end of the pinion shaft 67, and when inserted, the abutment surface 79 of the aforementioned regulating block 76
It is adjusted and fixed with screws 80 so that it comes into contact with.

Reference numeral 81 indicates the rear end 8 of the cutter unit body 31 when the cutter unit body 31 rotates and becomes vertically downward.
2 is a stopper that stops the rotation.

Reference numeral 83 is a feed shaft for vertically moving a unit 84 for molding a wire rod, and is pivotally supported by the insertion head main body 68 so as to be vertically slidable. A pin 86 connects the feed shaft 83 and the feed arm 86.

A compression spring 87 is interposed between the insertion head main body 68 and the feed shaft 83 and constantly pushes the feed shaft downward.

The head arm 64 and the feed arm 86 support cam followers so and j1, respectively, with a pin 89 supported by a bracket 88 attached to the upper part of the head body 68 as a fulcrum.
An insertion plate cam 93 attached to the camshaft 92 via the insert plate cam 93. Vertical movement is provided by the upper and lower plate cams 94.

Subsequently, the drive shaft 69 provided by the insertion plate cam 90. Insertion shaft 56
Regarding the operation of the cutter unit 17, 14th to 18th
This will be explained using figures.

As shown in FIG. 14, the cutter unit 17 is located at the origin (
At the start position, there is no risk of collision with the wire supply unit 14 due to movement of the wire rod switching.

As a result, the insertion plate cam 9o starts rotating, and as the drive shaft 69 moves upward, the insertion shaft 66 also rises at the same time since it is locked by the stepped portion of the drive shaft.

The pinion shaft 67 supported by the tip flange 68 of the insertion shaft 66 is rotated counterclockwise (arrow D) because the slide rack 69 that engages with the pinion shaft 67 comes into contact with the lower surface 71 of the head body due to this rise. As a result, the cutter unit 17 is rotated counterclockwise and is set to be in a horizontal state at the top dead center of the insertion plate cam 96.

If this position is set as the cutting position and the positional relationship with the wire is made as shown in FIG. 11, air is sent to the cylinder 32 to separate the wire fed from the wire feeding unit 14 and hold it in the mold as described above.

When the cutter unit 17 holds the wire, the drive shaft 69
begins to descend, and at the same time the insertion shaft 56, which is being pushed downward by the spring 61, also begins to descend.

When the descent begins, the slide rack 69 is constantly pushed upward by the built-in compression spring according to the downward stroke, so it is pushed up relatively, and the pinio/67 meshing with the rack now moves clockwise, that is, as shown by the arrow. As a result of rotating in the E direction, the cutter unit main body 31 also rotates clockwise, and the molded wire material is attached to the printed circuit board 19.
The rear end 31' of the cutter unit body 31 is located at the upper position.
to the stopper 81 to prepare for insertion. When the insertion shaft 66 descends a certain amount vertically from this point, the adjustment nut 61 hits the insertion head main body 58 and stops the insertion shaft 66 from descending.

At this time, if the adjustment nut 61 is adjusted and fixed so that the tip of the molded piece of the cutter unit 17 contacts the top surface of the printed circuit board 18 at the position where the adjustment nut 61 contacts the insertion head main body 68, the insertion hole 18 can be opened without applying any external force to the printed circuit board. The guide thread 36 of the molding element can be taken to the end.

Further, even after the insertion shaft 66 stops descending, the drive shaft 69 continues to descend independently, and the slider 72 connected by the pin 4 also descends along the groove 73 of the 7-lunge 68. Following this downward stroke, the regulating surface 19 of the regulating block 76 attached to the slider 72 and the regulating lever 78 immediately come into contact with each other, locking the rotation of the cutter unit body 31.
Furthermore, the arm shaft 46 is connected to the cam surface 76' of the cam block 76.
The holding lever 44 is rotated in the direction of arrow C via the roller 47 to release the clamped wire.

When the holding lever 44 releases the wire, the grip shear 38 pushes the component downward by the force of the compression spring 39 and bends the wire to the guide 36 of the molding element, which is already guided to the insertion arrow of the printed circuit board to be inserted. To ensure extrusion, the stepped portion 62 of the drive shaft 69 pushes down the rear end of the pusher 37 until insertion is complete.

When the insertion is completed and the drive shaft 69 reaches the bottom dead center 1, the air sent to the cylinder 32 of the cutter unit main body 31 is cut off and the piston 34 is returned to its original state.

After passing the bottom dead center, only the drive shaft 59 begins to rise, performing the reverse operation of the step part 62 mentioned above when lowering, and then locks the insertion shaft 66 with the step part 62 and moves it together as one body. and begins to rise. From here, the rack 69 is again attached to the lower surface 71 of the head body.
The pinion 67 and the canter unit main body 31 rotate counterclockwise and return to the original position. The above is one cycle of the insertion operation.

Next, the driving relationship of the insertion head section will be explained. In FIG. 17, 96 is a motor with a reduction gear and
It is attached to 8.

96 is a sprocket attached to the output shaft of the motor 96 with a speed reducer, and 97 is a transmission shaft pivotally supported by the head frame 68, which has a clutch e8 brake 99 at both ends. 10
0 is a Sugerocket attached to a clutch 98, which is connected to a motor with a reduction gear by a chain 101.

102 and 103 are sprockets attached to the camshaft 92 and the transmission shaft 98, and these two shafts are connected by a chain 104.

With the above structure, the rotation of the motor 96 with a speed reducer is transmitted to the camshaft 92, and as the camshaft 92 rotates, insertion work such as operation of the insertion shaft 56 is performed.

The steps of winding the raw wire, soldering, forming, forming the cut surface, and inserting the wire are schematically shown in FIG.

In this embodiment, a polyurethane coated wire is used, but other coated wires may be used, as long as the conducting wire is coated with a resin that melts with soldering heat.

According to the above embodiment, since the wire feeding section is equipped with a continuity detection function, the configuration can be simplified, and the wire can be fed while absorbing variations and errors in the soldering process of the wire.
This facilitates support for automatic mounting equipment that inserts jumper wires into predetermined positions on printed circuit boards, and is also advantageous in terms of component management and inspection.

As described above, according to the present invention, the process from processing the material to insertion can be performed by a series of automatic equipment without any manual effort, which is advantageous in reducing costs and time. In particular, by using a series of automatic mounting equipment, the insertion tact speed can be increased, the automatic insertion rate can also be improved, and the production capacity of the line can be improved by combining several equipment into a line.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a printed circuit board with high jumper wires, Figure 2 is an enlarged front view of high jumper wires, Figure 3 is a perspective view of a printed circuit board with jumper wires, and Figure 4 6 is a perspective view of a conventional jumper wire automatic insertion machine.
The figure is a side view of the automatic wire rod insertion machine, Figure 6 is a front view of soldering iso, Figure 7 is a side view of the automatic wire rod insertion machine in one embodiment of the present invention, and Figure 8 is a plan view of the wire rod supply unit. 9 is a side view of the same wire supply unit, FIG. 10 is an enlarged sectional view of the continuity detection section, FIG. 11 is a timing chart of continuity detection, and FIG. 12 is a plan sectional view of the cutter unit.
14 is a side sectional view of the cutter unit, FIG. 16 is an enlarged sectional view of the insertion head, FIG. 16 is a side sectional view of the insertion head, and FIG. 17 is a side sectional view of the same cutter unit. FIG. 18 is a side sectional view of the insertion head in the inserted state; FIG. 18 is a front sectional view of the main part of the insertion head; FIG.
The drawings are a sectional view taken along the line N-N' in FIG. 17, FIG. 20 is a plan view of the insertion head, and FIG. 21 is an explanatory diagram of the steps from the raw material to molding, cutting, and insertion. 14... Wire supply unit, 17a...
- Insertion unit, 24...Chuck member, 28
...Contactor, 58a...Insertion head section. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 6 Figure 7

Claims (2)

[Claims] (1) Detect the boundary between the insulating part and the conductive part of a conductive wire that alternately has parts covered with insulation and parts covered with conductive material such as solder, and based on this detection result, cut the wire by a predetermined amount. An automatic wire rod insertion machine consisting of a wire rod supply unit that feeds the wire rod, and an insertion unit that shapes and cuts the wire rod supplied by the intermittent drive of the wire rod feed unit into a predetermined shape and inserts the wire rod into a predetermined position on a printed circuit board. (2) The wire supply unit has a contact in contact with the wire, detects the boundary position between the insulating part and the conductive part, and
The automatic wire rod insertion machine according to claim 1, which is configured to open and close one yak member holding the wire rod in response to this signal, and feed the wire rod to a predetermined position facing the insertion head section.