JPH0261111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides for electrical pins to be arranged alternately from a carrier strip in which a plurality of electrical pins are integrally formed and protrude in parallel with each other in a substantially common plane. Relating to improvements in tools for removing.

Such pins in the form of strips are commonly used to make electrical contact with electrical conductors on printed circuit boards. For this purpose, each said pin, while still connected by said carrier strip, is inserted by a semi-automatic pin insertion machine provided with a tool as described by way of example in US Pat. No. 3,946,477. It can be inserted into a pre-formed hole in the circuit board, after which the carrier strip is removed from each pin. The pitch of the pins, ie the spacing between the pins along the carrier strip, must of course correspond to the spacing of the holes in the circuit board.
However, sometimes pins in the form of strips with the required pitch are not available on the market. For example, each hole in the circuit board into which the pins are inserted is spaced 0.20 inches apart, but the pins in the only strip form available at the time are spaced 0.10 inches apart from each other along their carrier strips. It is possible that this is the case.

The invention can also be used to remove alternate pins from the carrier strip in order to double the pitch of each pin and to pass the pins so removed to the machine. , also intended to provide a tool for removing said carrier strip from the pins which remain connected to said carrier strip after these pins have been inserted into the holes of a printed circuit board. ing.

According to the invention, the tool comprises a pin holder having a pin receiving surface and an abutting surface, and a row of regularly spaced parallel parallel pins opening into the pin receiving surface and spaced apart from each other by a predetermined distance. a plurality of pin receiving sockets, a plurality of parallel, regularly spaced pin relief grooves formed in said adjacent surfaces and spaced apart from each other by twice said predetermined distance; and a carrier strip holder. and wherein each alternate one of said sockets communicates with each one of said pin relief grooves, and said carrier strip holder has a groove for receiving said carrier strip, and said alternate one of said sockets communicates with each one of said pin relief grooves; is capable of being swung relative to said pin holder to move each pin received in one of said alternate sockets through said pin relief groove communicating with said socket; and thereby breaking the carrier strip from the pin received in the remaining socket.

Said carrier strip to which alternating pins are connected is
It can be removed from the groove in the carrier strip holder and loaded into a semi-automatic machine for inserting the pins into holes in the printed circuit board. When the pin is inserted into the hole, the carrier strip holder can be used to break off the carrier strip from the inserted pin. Each of the pins remaining in the socket in the pin holder and thus maintained in their original spaced-apart condition is inserted into the circuit board for insertion into another hole. It can be inserted into the machine with the help of a pin holder.

Conveniently, the socket is provided by a groove in the first plate, and the pin relief groove is provided by a notch formed in the edge of a second plate fixed to the first plate, for example by a screw. This is prepared by

The plates may be configured to be fixed to each other, the second plate having a shelf for receiving a shoulder on the first plate, and the socket groove extending from the edge of the first plate to the It extends to the shelf.

The carrier strip receiving groove opens into a longitudinal edge of the carrier strip holder, the carrier strip holder comprising:
It is conveniently long and flat, and in order to remove the carrier strip from the remaining pin in the socket, the carrier strip holder is rotated relative to the pin holder. Preferably, it has a handle for use in moving the carrier strip, said handle projecting from the opposite longitudinal edge of said carrier strip holder. Conveniently, the carrier strip holder comprises a pair of flat plates fixed to each other, for example by screws, for setting the carrier strip receiving groove and the handle.

For a better understanding of the invention and to show how it can be implemented to accomplish the objectives:
Reference will now be made, by way of example, to the accompanying drawings.

In the following, the problems to which the invention relates will be explained with reference to FIG. As shown in that figure, a strip 2 of electrical pins is provided with a carrier strip 4 which has a plurality of electrical pins 6 integrally formed therewith, which The pins 6 protrude from the strip 4 in substantially coplanar juxtaposition. Each pin 6 comprises an enlarged resilient portion 8 for retaining the pin within a hole 10 of the printed circuit board 12 and a protrusion 14 for restricting insertion of the pin 6 into said hole 10. ing. The pins 6 are spaced apart along the carrier strip 4 by a pitch of 0.10 inches. That is, each pin is spaced that distance from the next nearest pin. However, the holes 10, which are arranged in linear rows, are spaced apart from each other by twice the pitch distance of the pins 6, or 0.20 inches. Therefore, each pin is connected to each hole 1.
In order to be able to be inserted into the 0, each alternating pin protruding from said strip 4 must be removed. This is done simply by cutting the alternating pins at each neck 16 connecting them to the strip 4; This would be an unreasonable waste of time in view of the fact that the pins would be removed, and each alternate pin so removed would be wasted.
Each hole 10 is typically metal plated on the inside, and the plating therein is connected to a printed conductor (not shown) on the substrate 12.

As shown in FIGS. 2-6, the tool for removing each of the alternating pins from the carrier strip 4 comprises a pin holder 18 and a carrier strip holder 20. The pin holder 18 is in the form of a composite elongated, generally square block having a pin receiving surface 22 and a pin relief surface 24 adjacent thereto. 1 row (0.10 inch each)
A plurality of regularly spaced pin receiving sockets 26
is open into the pin receiving surface 22. A plurality of parallel, regularly spaced (0.20 inch) pin relief grooves 28 are provided in the pin relief surface 24, with alternating ones of the pin receiving sockets 26 each having a plurality of parallel pin relief grooves 28 spaced apart from each other (0.20 inch each). 28 and extends in common with it. In other words, it has approximately the same depth and width. Each of the pin receiving sockets 26 is
The dimensions are such that each pin 6 can be easily inserted into and removed from the socket 26. The carrier strip holder 20 is also in the form of an elongated, substantially rectangular composite block, and has a carrier strip receiving groove that opens into one surface 30 and extends linearly in the longitudinal direction. 32, which corresponds to the carrier strip 4
is dimensioned such that it can be easily inserted into and easily removed from the carrier strip receiving groove 32.

Each socket 26 of the pin holder 18 has a first
The pin relief groove 28 is provided by a groove 34 (see FIG. 2) formed in the surface 36 of the flat plate 40.
The second flat plate 44 is provided by a notch formed in the edge of the second flat plate 44, and the second flat plate 44 is connected to the flat plate 40 by screws 46.
Fixed to . The plate 44 has a shelf 48 that is flush with the base 50 of the groove 28 and receives a shoulder 52 on the plate 40, the groove 34 extending from the face 22 to the shelf 48. Exists.

The carrier strip holder 20 includes a pair of long flat plates 54 and 56, which are fixed to each other by screws 58 to form the carrier strip receiving groove 32. The flat plate 54 has a recess 60 extending over its entire length and defines a base with one side wall of the groove 32, the other side wall of the groove 32 being provided by the flat plate 56. There is. Each plate 54 and 56 is
On the opposite edge of said face 30 there is a square extension 62 which cooperates to form a handle 64.

During use of the tools 18, 20, the free end 66 of each column 6 of the strip 2 is inserted into a respective one of the sockets 26 of the pin holder 18, and the carrier strip 4 is inserted into the carrier It is inserted into the groove 32 of the strip holder 20. The retainer 20 is then rotated clockwise (as viewed in FIG. 4) so that it is received in one of the alternating sockets 26 communicating with one of the grooves 28. Each pin 6 is moved through the groove 28 so as to escape from the pin holder 18, so that the strip 4 is removed from the remaining pins 6, i.e. the pins 6 in the remaining sockets 26.
from which it is removed at the neck 16 of the pin.
The carrier strip 4, with the pins 6 now projecting at 0.20 inch intervals, is then removed from the groove 32. The pins remaining in the sockets 26 are spaced from each other by the same pitch distance as the pins remaining on the carrier strip 4.

The pins on the strip 4 and those in the socket 26 are now described in US Pat.
It is ready to be inserted into each hole 10 of said substrate 12 by a semi-automatic pin insertion machine of the type equipped with a tool according to No. 3946477. The semi-automatic pin insertion machine will be described schematically below with reference to FIGS. 7-9. The machine includes a straddle 68 on a base 69, which supports a work table 70 so that it can slide between concave wedges 71 in the direction of arrow A in FIG. The straddle platform 68 is
A hydraulic piston/cylinder device 72 is provided above the work table 70, and the piston/cylinder device 72 is provided above the work table 70.
A tool holder 76 carrying a pin insertion tool 74 is connected to the rod. The device 72, and therefore the tool holder 76 and tool 74, can slide along the straddle 68 in the direction of arrow B in FIG. The pin insertion plate 78 on the tool holder 76 is provided with a drag plate 80 biased by a spring 81. Above the drag plate 80 is a block 82 which cooperates with the pin insert plate 78 to form a carrier strip receiving recess 84. Below the drag plate 80, a row of pin guide ribs 86 is formed on the pin insertion plate 78, and the pin guide ribs 86 are connected to a pin guide groove 88 and a pin drive shoulder 9.
0. Further, the tool holder 76
A pin support blade 94 on a slider 100 fixed to a block 96 having a handle 98 is slidably mounted above. The tool holder 76
By manually pushing down the handle 98 against the action of the spring 104 acting between the hook block 105 fixed to the block 96 and the block 96, the blade 94 is moved to the position shown in FIG. It can be propelled to the pin support position shown in dashed lines.
As the blade 94 is advanced, a stop pin 106 in the slider 100 engages a hook recess 108 in the block 105 to releasably hold the blade 94 in its advanced position. Ru. At the end of the working stroke of the device 72, the stop pin 106 is moved out of the recess 108, as explained below, so that the blade 94 moves into its eighth position under the action of the spring 104.
It is returned to the position shown in the figure.

When the substrate 12 is placed on the worktable 70 with the plug 110 on the worktable 70 fitting into the hole 112 in the substrate 12, the carrier strip 4 Against the action, it is pushed manually below the drag plate 80, so that the carrier strip 4 is pushed into said recess 84.
and each pin 6 is received in a respective one of said grooves 88, with its protrusion 14 abuttingly engaging an adjacent shoulder 90. The handle 98 is then depressed so that the pin 6 is held firmly in place on the pin insertion plate 78 by the blade 94, shown in broken lines in FIG. Next, the hydraulic piston and cylinder device 72
It is actuated to perform the working and return strokes. During its working stroke, the tool holder 76 is driven toward the base plate 12, so that each pin 6 is driven into a respective hole 10 of a row of holes 10 in the base plate 12, and , and the blade 94 engages the substrate 12 so that the slider 100
is raised against the action of spring 110, thereby removing locking pin 106 from said notch 108;
The blade 94 is therefore returned to its FIG. 8 position under the action of the spring 104. As the tool holder 76 is moved through its return stroke by the device 72, the carrier strip 4 is thereby pulled out of the recess 84;
passing under the drag plate 80 and being cammed away from the pin insertion plate 78 by the heads of the ribs 86 so that each pin 6 is removed from its respective groove 88 and removed from the tool holder 76. remains fixed to the substrate 12 as it rises. The holding body 20 is constructed by fitting the strip 4 into the groove 32 of the holding body 20, so that the carrying strip 4
The holding body 20 is broken from the pin 6.
By swinging the strip 4 to the pin 6
Can be used to remove from.

To insert the pins in the pin holder 18 into a row of holes 10 in the substrate 12, the pin holder 18 is manually gripped and the free ends of the pins are passed through the grooves 88. , and is inserted through the lower part of the drag plate 80 against the action of the spring 81 of the drag plate 80, so that the protrusion 14 is finally inserted into the shoulder 9.
0, after which the pin holder 18 is removed, leaving the pin fixed to the insert plate 78 by the drag plate 80. The device 72 is then actuated to drive the tool holder 76 through the working and return strokes, so that the pins remain fixed in the holes 10 by their resilient portions 8. Become. Since the carrier strip 4 is broken from the pin 6 first by the holder 20, no further operation is required.

As the pin insertion operation progresses, the work table 70 is progressively advanced and the device 72 is increasingly slid along the straddle 68 so that the pins are inserted further into the substrate 12. can be inserted into the desired position.

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view of a portion of the strip of electrical pins associated with a portion of the printed circuit board; FIG. 2 is the removal of alternating pins from the strip shown in FIG. 1; FIGS. 3 to 5 are schematic perspective views showing successive stages of use of the tool, and FIG. 6 is a partially sectional view showing the details of FIG. 3. FIG. 7 is a perspective view of a semi-automatic machine for inserting pins into holes in printed circuit boards; FIG. 8 is a longitudinal sectional view of the tool of said machine; and FIG. , is a cutaway exploded perspective view showing the operation of the machine. 2... Band material, 4... Carrying strip, 6... Pin, 8
...Elastic part, 10...Hole, 12...Substrate, 14
...Protrusion, 16...Neck, 18...Pin holder, 2
0... Carrying strip holder, 22... Pin receiving surface, 2
4... Pin flank surface, 26... Pin receiving socket,
28... Pin relief groove, 30... One surface, 32...
Carrying strip receiving groove, 34... Groove, 36... Surface, 40
...first flat plate, 42...edge, 44...second flat plate,
48...Shelf, 50...Base, 52...Shoulder, 54,
56...flat plate, 58...screw, 60...recess, 6
1... concave wedge, 62... extension, 66... free end, 68... straddle pedestal, 69... base, 70...
...Work table, 72...Fluid pressure piston/cylinder device, 74...Pin insertion tool, 76...Tool holder, 78...Pin insertion plate, 80...Drag/
Plate, 81...Spring, 82...Block, 8
4... Carrying strip receiving recess, 86... Pin guide rib, 88... Pin guide groove, 90... Drive shoulder, 94
...Pin support blade, 96...Block, 98...Handle, 100...Slider, 104...Spring, 1
05... Hooking block, 106... Stopping pin, 108... Hooking recess, 110... Stopper.

Claims (1)

[Claims] 1. Removal of alternating electrical pins 6 from a carrier strip 4 in which a plurality of electrical pins 6 are integrally formed and protrude in such a manner that the pins 6 are juxtaposed in substantially a common plane. A pin holder 18 having a pin receiving surface 22 and an abutting surface 24
a plurality of regularly spaced parallel pin receiving sockets 26 opening into the pin receiving surface 22 and spaced apart from each other by a predetermined distance; a plurality of regularly spaced parallel pin relief grooves 28 in a row spaced apart from each other by twice a predetermined distance, and a carrier strip support 20, with alternate ones of said sockets each having a plurality of said pin relief grooves 28; It communicates with each one of the grooves 28,
Further, the carrier strip holder 20 is arranged so that the carrier strip 4
for moving each pin 6 received in one of said alternate sockets 26 through said pin relief groove 28 having a groove 32 for receiving said pin relief groove 28 and communicating with said alternate sockets 26; It can be swung relative to said pin holder 18 so that the remaining socket 2
An improved tool for removing alternating electrical pins from a carrier strip, characterized in that it breaks the carrier strip 4 from the pins 6 received in the carrier strip. 2. The socket 26 is connected to the surface 36 of the first flat plate 40.
The pin relief groove 28 is provided by the inner groove 34 and
is a second flat plate 44 fixed to the first flat plate 40.
Improved tool according to claim 1, characterized in that it is provided by a notch (28) formed in the edge (42) of the tool. 3. The second plate 44 has a shelf 48 for receiving the shoulder 52 on the first plate 40, and the groove 34 extends from the edge of the first plate 40 to the shelf 48. An improved tool according to claim 2. 4 the carrier strip holder 20 is elongated and planar, the groove 32 opening into the first longitudinal edge 30 of the strip holder 20 and the opposite side of the strip holder 20; An improved tool according to claim 1, characterized in that a handle (64) extends from the longitudinal edge of the tool. 5. The carrying strip holder 20 comprises a pair of elongated plates 54 and 56 fixed to each other for setting the groove 32 and the handle 64. Improved tooling as described.