JP6159452B2 - Wire bending machine - Google Patents

Description

  The present invention relates to a wire bending apparatus.

  Examples of wire bending work were as follows when the applicant filed earlier and obtained a patent. (Patent Document 1) That is, a rod-shaped mandrel that passes through the tip of the wire and extends in a direction orthogonal to the front surface of the head body, and passes through the mandrel in the center, and in the recess of the head body, A disc-shaped bending sleeve that is rotatably inserted around the bending sleeve, a bending projection protruding from the outer surface of the bending sleeve, and means for integrally moving the bending sleeve and the mandrel forward and backward. Further, on the end surface exposed on the front surface of the head body of the mandrel, a guide groove along the diameter and a guide surface along the circumferential direction are continuously provided at the other end in front of the wire feeding direction of the guide groove. The nose part which determines the minimum bending radius of a wire is formed in the boundary part of the guide surface with respect to these guide grooves formed. Then, the wire is fed out from the guide groove of the mandrel, the bending sleeve is rotated, and the bending projection is pushed and bent.

Japanese Patent No. 4554781

  However, U-shaped bending work with this apparatus requires three steps. That is, the wire passes through the guide groove of the mandrel, protrudes by L1 from the mandrel outlet, stops feeding the wire, rotates the bending sleeve forward by an angle G1, and pushes and bends the wire at the bending convex portion. Next, the bending sleeve is retracted, the wire is fed by L2, the bending sleeve is advanced, the bending sleeve is reversed by an angle G2, and the wire is pushed and bent at the bending convex portion. Next, the bending sleeve is retracted, the wire is fed by L3, the bending sleeve is advanced, the bending sleeve is rotated forward by an angle G3, and the wire is pushed and bent at the bending convex portion. Thus, the U-shaped bending work required three steps.

  An object of the present invention is to solve the above problems and to provide a wire bending apparatus capable of performing a U-shaped bending operation in one stroke.

  A wire bending apparatus according to a first solving means of the present invention includes a disk pin base attached to an upper end of a bending drive shaft that is rotatable about a vertical axis perpendicular to the wire feed direction, and an upper end of the pin base. A wire bending portion including a bending pin erected in a position radially away from the rotation axis, a bending driving portion having a prime mover connected to a lower portion of the bending driving portion, and an upper surface of the pin base Fixed side bending with two guide pieces constituting the guide path fixed to the mounting base to guide the passage of the wire on the upper side with a gap, and forming a wire bending guide surface in the vicinity of the pivot center of the pin base The guide part and two guide pieces constituting the guide path to guide the passage of the wire at the tip end side in the wire length direction across the disk pin base form a wire bending guide surface on the disk pin base side. A moving side bending guide portion and the guide Is fixed to the upper side, the mounting base is slidable in the wire length direction, and the rack is fixed to the lower end of the mounting base, and a pinion that meshes with the rack is rotated by a rotary motor. And a drive unit.

  The wire bending apparatus of the second solving means of the present invention comprises a disk pin base attached to an upper end of a bending drive shaft that is rotatable about a vertical axis perpendicular to the wire feed direction, and an upper end of the pin base. A wire bending portion including a bending pin erected in a position radially away from the rotation axis, a bending driving portion having a prime mover connected to a lower portion of the bending driving portion, and an upper surface of the pin base Fixed side bending with two guide pieces constituting the guide path fixed to the mounting base to guide the passage of the wire on the upper side with a gap, and forming a wire bending guide surface in the vicinity of the pivot center of the pin base The guide part and two guide pieces constituting the guide path to guide the passage of the wire at the tip end side in the wire length direction across the disk pin base form a wire bending guide surface on the disk pin base side. A moving side bending guide portion and the guide A mounting base that is slidable in the wire length direction, a stopper that is suspended from the bottom surface of the mounting base to the disk pin side, and a spring receiver that is suspended from the anti-disk pin side, A rack is slidably engaged with the lower surface of the mounting base in the wire length direction, a compression spring is interposed between the rack and a spring receiver, and a pinion engaged with the rack is rotated by a rotary motor. The movement guide driving unit is included.

  The wire bending apparatus of the third solving means of the present invention is a disk pin base attached to the upper end of a bending drive shaft that is rotatable about a vertical axis perpendicular to the wire feed direction, and an upper end of the pin base. A wire bending portion including a bending pin erected in a position radially away from the rotation axis, a bending driving portion having a prime mover connected to a lower portion of the bending driving portion, and an upper surface of the pin base Fixed side bending with two guide pieces constituting the guide path fixed to the mounting base to guide the passage of the wire on the upper side with a gap, and forming a wire bending guide surface in the vicinity of the pivot center of the pin base The guide part and two guide pieces constituting the guide path to guide the passage of the wire at the tip end side in the wire length direction across the disk pin base form a wire bending guide surface on the disk pin base side. A moving side bending guide portion and the guide A mounting base that is slidable in the wire length direction, a stopper that is suspended from the bottom surface of the mounting base to the disk pin side, and a spring receiver that is suspended from the anti-disk pin side, An intermediate member is slidably engaged with the lower surface of the mounting base in the wire length direction, a compression spring is interposed between the intermediate member and the spring receiver, and a rack is fixed to the lower end of the intermediate member. The meshing pinion includes a movement guide driving unit adapted to be rotated by a rotary motor.

  The wire bending device of the fourth solving means of the present invention is the first, second or third solving means, the whole of which is housed in a case, and on the lower surface of the horizontal base fixed to the device frame in the case elevating part. Piston cylinder is installed. A horizontal connecting rod is attached to the lower end of the piston rod, and support rods standing from both ends of the piston rod pass through the base and support the lower surface of the case.

  According to the present invention, a U-shaped bending operation can be performed in one stroke.

FIG. 1 is a plan view of the apparatus of the present invention. FIG. 2 is a front view of the device of the present invention. FIG. 3 is a left side view of the device of the present invention. 4 is a cross-sectional view taken along the line X4-X4 of FIG. 5 is a sectional view taken along the line Y5-Y5 of FIG. It is wire bending explanatory drawing in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. 1, 2 and 4, the wire W is gripped by the chuck 1 and bent into a U shape by the wire bending portion 10 as shown in FIG. That is, in the wire bending portion 10, a disk pin base 12 attached to the upper end of a bending shaft 13 that is rotatable about a vertical axis perpendicular to the wire feed direction, and the rotation at the upper end of the pin base. And a bending pin 11 erected at a position away from the axis in the radial direction. In the figure, two are erected at positions separated from each other in the circumferential direction around the rotation axis. A bending drive unit 20 having a prime mover connected to the lower portion of the bending shaft 13 is provided, and is rotated by a passive gear 21 by a drive gear and a servo motor (not shown).

  In the fixed bending guide portion 30, two guide pieces 31 constituting a guide path are fixed to the mounting base 32 so as to guide the passage of the wire on the upper side with a space from the upper surface of the pin base 12. A wire bending guide surface 31a is formed in the vicinity of the twelve rotation centers. The movable bending guide part 40 is provided with two guide pieces 41 constituting a guide path so as to guide the passage of the wire on the distal end side in the wire length direction with the disk pin base 12 interposed therebetween. A wire bending guide surface 41a is formed on the side.

  The rectangular parallelepiped mounting base 42 with the guide piece 41 fixed on the upper side is slidable in the wire length direction, and a stopper 42a is suspended on the disk pin 12 side on the lower surface of the mounting base, and on the anti-disk pin 12 side. The spring receiver 42b is suspended.

  4 and 5, in the movement guide drive unit 50, a rectangular parallelepiped intermediate member 51 is slidably engaged with the lower surface of the mounting base 42 in the wire length direction and compressed between the intermediate member 51 and the spring receiver 42b. A spring 52 is interposed, and a rack 53 is fixed to the lower end of the mounting base 42. A pinion 54 that meshes with the rack is fixed to a moving shaft 55, and a worm 57 meshes with a wheel 56 attached to the shaft, and the worm 57 is rotated by a moving motor 58.

  The whole is accommodated in the case 2 and moved up and down. In the case elevating unit 60, a piston cylinder 61 is mounted on the lower surface of the horizontal base 4 fixed to the device frame 3. A horizontal connecting rod 62 is attached to the lower end of the piston rod, and a support rod 63 erected from both ends of the piston rod passes through the base 4 to support the lower surface of the case 2.

  1, 2, 4, the wire W is grasped by the chuck 1 and lowered from above, and is fixed between the fixed guide pieces 31, 31, between the bending pins 11, 11, and between the movable guide pieces 41, 41. Hold in. Next, the bending drive unit 20 operates, and the pin base 12 rotates to the right. At the same time, when the movement guide driving unit 50 is operated, the pinion 54 rotates to the right in FIG. 4 and the movement guide piece 41 approaches the pin base 12 together with the rack 53 and stops.

  As a result, as shown in FIG. 6, the wire bends in a U shape while being received by the bending guide surfaces 31a and 41a of the fixed and moving guide pieces 31 and 41 on both sides of the U-shaped portion. At this time, at the initial stage of bending, the wire is pulled toward the pin base due to the tensile force caused by the bending of the wire, and the moving guide piece is pulled toward the pin base while contracting the spring 52 due to the frictional force with the wire. And a clearance gap arises between the intermediate member 51 and the stopper 42a. Thereafter, the compression spring 52 extends the moving guide piece 41 while extending, and there is no gap between the intermediate member and the stopper. Thereby, the movement of the movement guide piece 41 follows the movement of the rack 53 and the pinion 54. When the pin base 12 rotates to the left in FIG. 6, the other pin 11 bends in a U-shape opposite to the above.

  Next, in FIGS. 2 and 4, when the case 2 is lowered by operating the piston cylinder 61 of the case elevating unit 60, the wire W is held by the chuck 1, and the bending pin is interposed between the fixed guide pieces 31 and 31. 11, 11 and between the moving guide pieces 41, 41, the arm of the chuck 1 is rotated upward, and the chuck 1 is separated from the chuck 1 at a product receiver (not shown).

  The present invention is not limited to the embodiments and embodiments described above, and includes various modifications without departing from the scope of the claims.

  The present invention is used in a wire bending apparatus.

W Wire 1 Chuck 2 Case 3 Device frame 4 Base 10 Wire bending part 11 Bending pin 12 Pin base 13 Bending shaft 20 Bending drive part 21 Passive gear 30 Fixed bending guide part 31 Guide piece 31a Bending guide surface 32 Mounting base 40 Moving bending Guide part 41 Guide piece 41a Bending guide surface 42 Mounting base 42a Stopper 42b Spring support 50 Movement guide drive part 51 Intermediate member 52 Spring 53 Rack 54 Pinion 55 Moving shaft 56 Wheel 57 Worm 58 Moving motor 60 Case elevating part 61 Piston cylinder 62 Connecting rod 63 Support rod

Claims (4)

A disk pin base attached to the upper end of a bending drive shaft that is rotatable about a vertical axis perpendicular to the wire feed direction, and a position that is radially away from the rotational axis at the upper end of the pin base. A wire bending portion including a bending pin erected, and
A bending drive with a prime mover connected to the lower portion of the bending drive;
Two guide pieces constituting the guide path are fixed to the mounting base so as to guide the passage of the wire on the upper side with a space from the upper surface of the pin base, and the wire bending guide surface near the rotation center of the pin base. A fixed-side bending guide portion formed,
Two guide pieces constituting a guide path so as to guide the passage of the wire on the distal end side in the wire length direction across the disk pin base are formed with a wire bending guide surface on the disk pin base side, and the moving side A bending guide,
The guide part is fixed to the upper side, the mounting base is slidable in the wire length direction, and the rack is fixed to the lower end of the mounting base, and the pinion that meshes with the rack is rotated by a rotary motor. A wire bending apparatus including the moving guide driving unit.
A disk pin base attached to the upper end of a bending drive shaft that is rotatable about a vertical axis perpendicular to the wire feed direction, and a position that is radially away from the rotational axis at the upper end of the pin base. A wire bending portion including a bending pin erected, and
A bending drive with a prime mover connected to the lower portion of the bending drive;
Two guide pieces constituting the guide path are fixed to the mounting base so as to guide the passage of the wire on the upper side with a space from the upper surface of the pin base, and the wire bending guide surface near the rotation center of the pin base. A fixed-side bending guide portion formed,
Two guide pieces constituting a guide path so as to guide the passage of the wire on the distal end side in the wire length direction across the disk pin base are formed with a wire bending guide surface on the disk pin base side, and the moving side A bending guide,
A mounting base that is fixed on the upper side and is slidable in the wire length direction, a stopper that is suspended from the bottom surface of the mounting base to the disk pin side, and a spring receiver that is suspended from the anti-disk pin side When,
A rack is slidably engaged with the lower surface of the mounting base in the wire length direction, a compression spring is interposed between the rack and a spring receiver, and a pinion engaged with the rack is rotated by a rotary motor. A wire bending apparatus including a movement guide driving unit.
A disk pin base attached to the upper end of a bending drive shaft that is rotatable about a vertical axis perpendicular to the wire feed direction, and a position that is radially away from the rotational axis at the upper end of the pin base. A wire bending portion including a bending pin erected, and
A bending drive with a prime mover connected to the lower portion of the bending drive;
Two guide pieces constituting the guide path are fixed to the mounting base so as to guide the passage of the wire on the upper side with a space from the upper surface of the pin base, and the wire bending guide surface near the rotation center of the pin base. A fixed-side bending guide portion formed,
Two guide pieces constituting a guide path so as to guide the passage of the wire on the distal end side in the wire length direction across the disk pin base are formed with a wire bending guide surface on the disk pin base side, and the moving side A bending guide,
A mounting base that is fixed on the upper side and is slidable in the wire length direction, a stopper that is suspended from the bottom surface of the mounting base to the disk pin side, and a spring receiver that is suspended from the anti-disk pin side When,
An intermediate member is slidably engaged with the lower surface of the mounting base in the wire length direction, a compression spring is interposed between the intermediate member and a spring receiver, and a rack is fixed to the lower end of the intermediate member. A wire bending apparatus including a movement guide driving unit configured to rotate a pinion that meshes with the pinion by a rotary motor.
The entirety is accommodated in a case, and a piston cylinder is mounted on the lower surface of the horizontal base fixed to the apparatus frame in the case elevating part. 4. A wire bending apparatus according to claim 1, wherein a horizontal connecting rod is attached to a lower end of the piston rod, and a support rod standing from both ends of the piston rod passes through the base and supports the lower surface of the case. .

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