JP2008282741A - Pin insertion mechanism, and pin insertion method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin insertion mechanism and a pin insertion method hardly producing cutting waste, and capable of preventing a burr and sagging from being easily generated at a top part of a pin. <P>SOLUTION: In this pin insertion method, the rear side of wire 2 relative to a constricted part 2a thereof is sandwiched between pin feeding chuck parts 21 and 22, the front side of the wire 2 relative to the constricted part 2a thereof is sandwiched between pin inserting chuck parts 31 and 32, and, when the pin inserting chuck parts 31 and 32 are rotated at a predetermined angle (for instance, 90°) in this state, the constricted part 2a of the wire 2 is twisted. By advancing the pin inserting chuck parts 31 and 32 toward an object S in this state, the constricted part 2a can be twistingly cut. Since the constricted part 2a can be thus cut by being twistingly cut instead of being sheared, cutting waste is hardly produced, the cutting waste hardly scatter on the object S, and a burr or sagging is hardly generated at a top part of a pin P cut from the wire 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pin insertion mechanism and a pin insertion method for inserting pins used as lead terminals into electronic components (objects) such as a printed circuit board and a connector.

  Conventionally, as a technique in such a field, there is JP-A-9-245930. The pin insertion method described in this publication uses a wire guide to insert the foremost part of the wire into the insertion hole of the plate (object), and then the XY table on which the plate is placed, The wire is moved in a direction perpendicular to the longitudinal direction of the wire, and the wire is cut by shear stress. This cutting method is an example, but it is a general method to cut the constricted portion of the wire with a shearing force.

Japanese Patent Laid-Open No. 9-245930 JP-A-8-298176

  However, if the wire is cut only by shearing force, cutting scraps are likely to be generated during shearing, and the cutting scraps are likely to be scattered on the object. There is a problem that makes it troublesome. Furthermore, there is a problem that burrs and sagging are likely to occur at the top of the pin separated from the wire.

  An object of the present invention is to provide a pin insertion mechanism and a pin insertion method in which cutting scraps are hardly generated and burrs and sagging are hardly generated at the top of the pin.

The pin insertion mechanism according to the present invention is a pin insertion mechanism for inserting a pin separated by a constricted portion of a wire into an object.
A reciprocating motion in the longitudinal direction of the wire rod, and an openable pin feed chuck portion that is arranged outside the wire rod and enables pinching of the wire rod,
An openable and closable pin insertion chuck portion that reciprocates along the longitudinal direction of the wire and is disposed outside the pin feed chuck portion and allows the wire rod to be sandwiched in front of the pin feed chuck portion. Prepared,
The pin insertion chuck portion rotates around the central axis of the wire.

  In this pin insertion mechanism, the pin feed chuck portion sandwiches the rear side of the wire rod constriction, and the pin insertion chuck portion clamps the front side of the wire rod constriction portion. In this state, the pin insertion chuck portion Is rotated by a predetermined angle (for example, 90 °), the constricted portion of the wire is twisted. In this state, the constricted portion can be twisted by advancing the pin insertion chuck portion toward the object. Thus, since the constricted portion is cut not by shearing but by twisting, it is difficult for cutting waste to be generated, and it is difficult for the cutting waste to be scattered on the object. Sag is less likely to occur.

The pin insertion method according to the present invention is a pin insertion method for inserting a pin formed by separation at a constricted portion of a wire into an object,
A step of pinching the wire rod by the pin feeding chuck portion behind the constricted portion;
Sandwiching the wire with the pin insertion chuck portion on the front side of the constricted portion; and
A pin twisting step of rotating the pin insertion chuck portion by a predetermined angle around the central axis of the wire rod while the wire rod is sandwiched between the pin feed chuck portion and the pin insertion chuck portion;
A step of advancing the pin insertion chuck portion toward the object after completion of the pin twisting step.

  In this pin insertion method, the pin feed chuck portion sandwiches the rear side from the constricted portion of the wire, and the pin insert chuck portion grasps the front side from the constricted portion of the wire rod. In this state, the pin insertion chuck When the portion is rotated by a predetermined angle (for example, 90 °), the constricted portion of the wire is twisted. In this state, the constricted portion can be twisted by advancing the pin insertion chuck portion toward the object. Thus, since the constricted portion is cut not by shearing but by twisting, it is difficult for cutting waste to be generated, and it is difficult for the cutting waste to be scattered on the object. Sag is less likely to occur.

  According to the present invention, it is difficult for cutting waste to be generated, and it is difficult to generate burrs and sagging at the top of the pin.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a pin insertion mechanism and a pin insertion method according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the pin insertion mechanism 1 is used as a lead terminal for various electronic parts such as a printed circuit board and a connector while cutting a wire 2 wound around a reel (not shown) by a predetermined length. The conductive pin P to be inserted is inserted, and forms a mechanical main part of the high-speed type pin insertion device.

  The pin insertion mechanism 1 includes an outer cylinder 4 supported by a first bearing 3, a pin insertion chuck mechanism 5 provided at the lower end of the outer cylinder 4, and a second bearing 6 fixed to the outer cylinder 4. The supported inner cylinder 7, the pin feed chuck mechanism 8 provided at the lower end of the inner cylinder 7, the first elevating mechanism 9 for reciprocating the outer cylinder 4 in the vertical direction, and the inner cylinder 7 reciprocating in the vertical direction. A second elevating mechanism 10 to be moved, a rotating mechanism 11 for rotating the pin insertion chuck mechanism 5 around a rotation axis L extending in the vertical direction, and a swinging claw 12 for restricting the vertical movement of the wire 2 Is mainly composed of A connector (object) S, which is an example of an electronic component, is fixed on the XY stage 13.

  The first elevating mechanism 9 for reciprocating the outer cylinder 2 in the vertical direction includes an air cylinder 14 fixed to the housing 3a of the first bearing 3 and a horizontal extension of the air cylinder 14 from the outer cylinder 4. And an operating arm 15 fixed to the piston 14a. And the outer cylinder 4 can be moved up and down by advancing and retracting the piston 14a of the air cylinder 14 in the up and down direction.

  Similarly, the second elevating mechanism 10 for reciprocating the inner cylinder 7 in the vertical direction includes an air cylinder 16 fixed to the housing 3 a of the first bearing 3 and an air cylinder 16 extending horizontally from the inner cylinder 7. And an actuating arm 17 fixed to the piston 16a of the cylinder 16. The inner cylinder 7 can be moved up and down by moving the piston 16a of the air cylinder 16 forward and backward.

  A rotation mechanism 11 for rotating the pin insertion chuck mechanism 5 around the rotation axis L includes a pinion portion 19 fixed to an outer peripheral wall of a rotating body 18 that is rotatable with respect to the outer cylinder 4, and a pinion portion 19. The rack part 20 which meshes and the air cylinder (not shown) which reciprocates the rack part 20 in a horizontal direction are provided. Therefore, by causing the rack portion 20 to reciprocate linearly in the horizontal direction by the air cylinder, the pinion portion 19 meshed with the rack portion 20 rotates, and accordingly, the rotating body 18 can be rotated by a predetermined angle. Then, the pin insertion chuck mechanism 5 fixed to the lower portion of the rotating body 18 also rotates about the rotation axis L.

  Further, the swinging claw 12 for restricting the vertical movement of the wire 2 is swung by a solenoid or an air cylinder (not shown). Then, by allowing the tip of the swinging claw 12 to enter the constricted portion 2A of the wire 2, the vertical movement of the wire 2 is restricted, and the tip of the swinging claw 12 is disengaged from the constricted portion 2A of the wire 2. The vertical movement of the wire 2 is allowed.

  As shown in FIGS. 1 and 2, the pin feed chuck mechanism 8 has one end fixed to the upper ends of a pair of left and right pin feed chuck portions 21 and 22 having a “<” shape and a first chuck portion 21. The first arm portion 23, the second arm portion 24 having one end fixed to the upper end of the second chuck portion 22, and the air cylinder 25 for driving the first and second arm portions 23 and 24. Consists of.

  Openable and closable first and second chuck portions 21 and 22 disposed outside the wire 2 are swingably connected to the lower end of the inner cylinder 7 via support shafts 21a and 22a. The upper end of the first chuck portion 21 is connected to one end of the first arm portion 23 by a fixing pin 26, and the upper end of the second chuck portion 22 is connected to one end of the second arm portion 24 by a fixing pin 27. Then, the other end of the first arm portion 23 and the other end of the second arm portion 24 are coupled to each other via a rotation shaft 28 so as to be rotatable. Further, the tip of the piston 25 a of the air cylinder 25 fixed to the inner cylinder 7 is connected to the rotating shaft 28.

  The operation of the pin feed chuck mechanism 8 will be described. First, when the piston 25a of the air cylinder 25 is advanced downward, the rotary shaft 28 is lowered, and the first arm portion 23 and the second arm portion 24 become V-shaped. The first and second chuck portions 21 and 22 swing around the support shafts 21a and 22a, and the tips of the first and second chuck portions 21 and 22 move outward. The tip of the first chuck portion 21 and the tip of the second chuck portion 22 are separated from each other.

  Further, by retreating the piston 25a of the air cylinder 25 upward, the rotary shaft 28 is raised, and the first arm portion 23 and the second arm portion 24 are in a straight line. Then, the first and second chuck portions 21 and 22 swing around the support shafts 21a and 22a, and the tips of the first and second chuck portions 21 and 22 move inwardly. The wire 2 is sandwiched between the tip of the first chuck portion 21 and the tip of the second chuck portion 22. The first and second chuck portions 21 and 22 reciprocate in the longitudinal direction (vertical direction) of the wire 2 by the second lifting mechanism 10.

  As shown in FIGS. 1 and 3, the pin insertion chuck mechanism 5 has one end fixed to the upper end of a pair of left and right pin insertion chuck portions 31, 32 having a “<” shape and a third chuck portion 31. The third arm portion 33, the fourth arm portion 34 having one end fixed to the upper end of the fourth chuck portion 32, the air cylinder 35 for driving the third and fourth arm portions 33, 34, Consists of.

  The openable and closable third and fourth chuck portions 31 and 32 disposed outside the pin feed chuck portions 21 and 22 located on the inner side swing to the lower end of the rotating body 18 via the support shafts 31a and 32a. It is connected freely. The upper end of the third chuck portion 31 is connected to one end of the third arm portion 33 by a fixing pin 36, and the upper end of the fourth chuck portion 32 is connected to one end of the fourth arm portion 34 by a fixing pin 37. Then, the other end of the third arm portion 33 and the other end of the fourth arm portion 34 are coupled to each other via a rotation shaft 38 so as to be freely rotatable. Further, the tip of a piston 35 a of an air cylinder 35 fixed to the rotating body 18 is connected to the rotating shaft 38.

  The operation of the pin insertion chuck mechanism 5 will be described. First, when the piston 35a of the air cylinder 35 is advanced downward, the rotating shaft 38 is lowered, and the third arm portion 33 and the fourth arm portion 34 become V-shaped. The third and fourth chuck portions 31 and 32 swing around the support shafts 31a and 32a, and as a result, the tips of the third and fourth chuck portions 31 and 32 move outward. The tip of the third chuck portion 31 and the tip of the fourth chuck portion 32 are separated from each other.

  Further, by retreating the piston 35a of the air cylinder 35 upward, the rotation shaft 38 rises, and the third arm portion 33 and the fourth arm portion 34 become straight. The third and fourth chuck portions 31 and 32 swing around the support shafts 31a and 32a, and the tips of the third and fourth chuck portions 31 and 32 move inward. The wire 2 is sandwiched between the tip of the third chuck portion 31 and the tip of the fourth chuck portion 32. The third and fourth chuck portions 31 and 32 reciprocate in the longitudinal direction (vertical direction) of the wire 2 by the first elevating mechanism 9.

  Next, the operation of the pin insertion mechanism 1 will be described.

  As shown in FIG. 4, the constricted part 2a (FIG. 10) located at the lowest side of the wire 2 is formed by the third chuck part 31 and the fourth chuck part 32 after being rotated 90 degrees from the state of FIG. The lower side (front side) is sandwiched between the first chuck part 21 and the second chuck part 22, and the upper side (rear side) of the constricted part 2 a (see FIG. 10) located on the lowermost side of the wire 2. Side) is pinched. The first to fourth chuck portions 21, 22, 31, 32 start to descend from the uppermost position by driving the first and second elevating mechanisms 9, 10 (see FIG. 1). At this time, the tip of the swinging claw 12 (see FIG. 1) is detached from the constricted portion 2A of the wire 2.

  During this descent, as shown in FIG. 5, the rotation mechanism 11 (see FIG. 1) rotates the third and fourth chuck portions 31 and 32 by 90 degrees about the rotation axis (center axis of the wire) L. The constricted portion 2a is twisted 90 degrees (pin twisting step). After the rotation by 90 degrees, the lowering of only the first and second chuck portions 21 and 22 is stopped by stopping the driving of the second lifting mechanism 10 (see FIG. 1). Then, as shown in FIG. 6, only the third and fourth chuck portions 31 and 32 continue to descend by driving the first elevating mechanism 9, so that the wire 2 is twisted at the constricted portion 2a, and the pin P is inserted into the perforation 40 of the connector (object) S.

  Thereafter, as shown in FIG. 7, the air cylinder 25 (see FIG. 2) is driven to separate the tip of the first chuck portion 21 and the tip of the second chuck portion 22 so that the first and second chuck portions are separated. The wire 2 is released from 21 and 22. Further, the tip of the third chuck part 31 and the tip of the fourth chuck part 32 are separated from each other by driving the air cylinder 35 (see FIG. 3), and the pin P2 is moved from the third and fourth chuck parts 31 and 32. release. At this time, the tip of the swinging claw 12 (see FIG. 1) enters the constricted portion 2A of the wire 2 to restrict the movement of the wire 2.

  Thereafter, as shown in FIG. 8, the third and fourth chuck portions 31 and 32 are raised by driving the first lifting mechanism 9 (see FIG. 1). Then, as shown in FIG. 9, the first and second chuck portions 31 and 32 are reversed 90 degrees about the rotation axis (center axis of the wire rod) L by the rotation mechanism 11 (see FIG. 1). And the 1st-4th chuck | zipper parts 21, 22, 31, and 32 are raised to the uppermost position by the drive of the 2nd raising / lowering mechanisms 9 and 10 (refer FIG. 1). In this case, the 1st-4th chuck | zipper parts 21, 22, 31, and 32 raise to the position corresponding to FIG.

Thereafter, the air cylinders 25 and 35 (see FIGS. 2 and 3) are driven, and the wire 2 is sandwiched between the first to fourth chuck portions 21, 22, 31, and 32. Thereafter, the XY stage 13 (see FIG. 1) is moved in the front and back direction in FIG. 9, and the next drilling of the connector (object) S is moved to just below the tip of the wire 2. Thereafter, the above-described operation is repeated.

  In such a pin insertion mechanism 1 and a pin insertion method, the first and second chuck portions 21 and 22 hold the rear side of the constricted portion 2a of the wire 2 and the third and fourth chuck portions 31 and 32 are interposed therebetween. Thus, the front side of the constricted portion 2a of the wire 2 is clamped. In this state, as shown in FIG. 10A, when the third and fourth chuck portions 31 and 32 are rotated by a predetermined angle (for example, 90 °), the constricted portion 2a of the wire 2 is twisted. In this state, the constricted portion 2a can be twisted by advancing the third and fourth chuck portions 31, 32 toward the connector (object) S.

  As described above, when the constricted portion 2a closest to the tip of the wire 2 is cut not by shearing but by twisting operation, cutting waste is hardly generated, and the cutting waste is not easily scattered on the connector (object) S. Burrs and sagging are less likely to occur at the top Pa of the pin P cut from the wire 2 (see FIG. 10B). FIG. 11 is a photograph showing the twisted state of the top portion Pa of the pin P observed with a microscope, and a large number of substantially circular striped patterns can be seen on the top portion Pa.

  It goes without saying that the present invention is not limited to the embodiment described above. For example, the angle at which the third and fourth chuck portions 31 and 32 are rotated about the rotation axis (center axis of the wire) L by the rotation mechanism 11 may not be 90 degrees but may be 180 degrees. . Moreover, it is not restricted to the case where the pin insertion mechanism 1 starts from the state of FIG. 4, The pin insertion mechanism may start from the state of FIG.

It is sectional drawing which shows one Embodiment of the pin insertion mechanism which concerns on this invention. It is a perspective view which shows the pin feed chuck mechanism applied to the pin insertion mechanism which concerns on this invention. It is a perspective view which shows the pin feed chuck mechanism and pin insertion chuck mechanism which are applied to the pin insertion mechanism which concerns on this invention. It is sectional drawing which shows the state which the 1st-4th chuck | zipper part was located in the top. It is sectional drawing which shows the state which the 3rd and 4th chuck | zipper part rotated 90 degree | times, while the 1st-4th chuck | zipper part descend | falls. It is sectional drawing which shows the state which only the 1st and 2nd chuck | zipper part stopped and the 3rd and 4th chuck | zipper parts fell. It is sectional drawing which shows the state from which the wire was released from the 1st and 2nd chuck | zipper parts, and the pin was released from the 3rd and 4th chuck | zipper parts. It is sectional drawing which shows the state which only the 3rd and 4th chuck | zipper part raised. It is sectional drawing which shows the state which the 3rd and 4th chuck | zipper part reversed 90 degree | times, as the 1st-4th chuck | zipper part raises. (A) shows before cutting of a wire, (b) is a perspective view showing the top of a pin after cutting of a wire. It is the photograph which showed the twisted state of the top part of the pin observed with the microscope.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Pin insertion mechanism, 2 ... Wire, 2a, 2A ... Constriction part, 21, 22 ... 1st and 2nd chuck part (pin feed chuck part), 31, 32 ... 3rd and 4th chuck part ( Pin insertion chuck part), L ... central axis of wire, S ... connector (object), P ... pin.

Claims (2)

In a pin insertion mechanism for inserting a pin separated by a constricted portion of a wire into an object,
A reciprocating motion in the longitudinal direction of the wire, and an openable and closable pin feed chuck portion that is disposed outside the wire and allows the wire to be sandwiched.
For reciprocating along the longitudinal direction of the wire rod, and being arranged outside the pin feed chuck portion, and for opening and closing freely openable pins that allow the wire rod to be sandwiched in front of the pin feed chuck portion. A chuck portion,
The pin insertion mechanism, wherein the pin insertion chuck portion rotates around a central axis of the wire. In a pin insertion method for inserting a pin formed by constricting a wire rod into an object,
Sandwiching the wire by a pin feeding chuck portion on the rear side of the constricted portion; and
Clamping the wire by a pin insertion chuck portion on the front side of the constricted portion; and
A pin twisting step of rotating the pin insertion chuck portion by a predetermined angle around the central axis of the wire in a state where the wire rod is sandwiched between the pin feeding chuck portion and the pin insertion chuck portion;
And a step of advancing the pin insertion chuck portion toward the object after completion of the pin twisting step.