JP2016147307A - Feeder of weld bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive feeder of a weld bolt having a simple constitution capable of miniaturizing a cylinder because a small output is sufficient in the vertically-movable cylinder of the weld bolt.SOLUTION: A second driving device is mounted on the tip of a moving member of a first driving device, and a holding part of a weld bolt is fitted to a vertically-movable moving member of the second driving device. The holding part adsorbs and holds the weld bolt by vacuum.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a welding bolt supply device for automatically supplying a welding bolt to a workpiece installed in a welding machine.

  Conventionally, as shown in FIG. 7, the welding bolt 52 supplied at a position away from the welding position of the welding device 51 is held by a holding portion 53, and an upper electrode 55, a welding bolt 52, The welding holes 57 of the 56 and the insertion holes 59 of the lower electrode 58 are moved to a straight line, and the air cylinder 61 fixed to the stationary member 60 lowers the entire driving device 54 so that the bolt portion of the welding bolt 52 is moved. It was inserted into the insertion hole 59 of the lower electrode 58 through the welding hole 57 of the work 56. (For example, see Patent Document 1)

JP 7-328773 A

  In such a case, since the entire drive device is moved up and down by the air cylinder, an air cylinder with a large output is used and it is firmly attached to a stationary member, and the connection between the air cylinder and the drive device is also strong. There was a problem of becoming expensive.

  The present invention solves the above-described problems, and provides a welding bolt supply device that can reduce the size of the cylinder for the vertical movement of the welding bolt, reduce the size of the cylinder, and is simple in structure. For the purpose.

  The welding bolt supply device of the present invention, which has been made to solve the above-mentioned problems, has a holding portion that holds the welding bolt in the supply portion by means of the first driving device, between the upper electrode and the workpiece, The axial center of the welding bolt, the work hole of the work and the insertion hole of the lower electrode is moved to a position where it is in a straight line, the holding part is lowered by the second drive device, and the bolt part of the weld bolt is passed through the work hole. In a welding bolt supply device that is inserted into an insertion hole of a lower electrode and welds a welding bolt to a workpiece, a second driving device is attached to the tip of a moving member of the first driving device, and the second driving The holding part of the welding bolt is attached to a moving member that moves up and down of the apparatus.

  It is preferable that the holding portion is to hold the welding bolt by vacuum, and this is the invention according to claim 2.

  The second driving device is preferably an air cylinder, and this is the invention of claim 3.

  According to the first aspect of the present invention, the second driving device is attached to the tip of the moving member of the first driving device, and the holding portion of the welding bolt is attached to the moving member that moves up and down of the second driving device. Therefore, only the holding portion is moved up and down by the second driving device provided at the tip of the moving member of the first driving device to insert the welding bolt into the insertion hole of the lower electrode through the welding hole of the workpiece. Therefore, the second driving device may have a small output, can be miniaturized, has a simple configuration, and can be manufactured at low cost.

  According to the second aspect of the present invention, the holding portion can be reduced in size by holding the welding bolt by vacuum.

  According to the third aspect of the present invention, the second driving device is an air cylinder, so that the second driving device can be made smaller.

  The front view of the welding apparatus which shows embodiment of this invention   The front view which shows the state which advanced the rod of the 1st cylinder of FIG.   FIG. 2 is a partially cutaway front view showing the main part in the state of FIG.   FIG. 3 is a partially cutaway front view showing a state where the rod of the first cylinder in FIG. 3 is lowered.   Sectional view showing an example of the supply section   Sectional drawing which shows the state which advanced the rod of the 3rd cylinder of FIG.   Front view showing a conventional example

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  1 and 2 are front views of a welding apparatus showing an embodiment of the present invention. In the figure, reference numeral 1 denotes a first cylinder which is a first driving device, and a second cylinder 3 which is a second driving device is attached to the tip of a rod 2 which is a moving member of the first cylinder 1. A holding portion 6 that holds the welding bolt 5 by suction is attached to a rod 4 that is a moving member that moves up and down of the second cylinder 3.

  The first cylinder 1 has a tip attached obliquely downward, the first rod 2 can be advanced and retracted, and the supply portion 8 of the welding bolt 5 at a position away from the welding device 7 with the holding portion 6; Between the upper electrode 9 of the welding apparatus 7 and the workpiece 10, the upper electrode 9, the welding bolt 5, the welding hole 11 of the workpiece 10, and the position where the axial centers of the lower electrode 12 are moved forward and backward.

  Reference numeral 13 denotes a vacuum generator fixed to the outer periphery of the first cylinder 1 together with the filter 14, and the vacuum generator 13 is connected to the holding portion 6 through the filter 14 by hoses 15 and 16.

  Reference numeral 17 denotes a parts feeder for the welding bolt 5, and 18 denotes a hose that sends the welding bolt 5 from the parts feeder to the supply unit 8.

  Reference numeral 19 denotes a hose connecting a compressor (not shown) and the second cylinder 3, and 20 is a hose connecting a compressor (not shown) and the vacuum generator 13.

  Next, a method for supplying the welding bolt 5 in the embodiment will be described. After the welding bolt 5 is sucked and held by the holding portion 6 by the supply portion 8 at the retracted position of the rod 2 of the first cylinder 1 (position away from the welding device 7), the rod 2 is attached to the upper electrode 9 of the welding device 7. The welding bolt 5, the welding hole 11 of the workpiece 10, and the lower electrode 12 are advanced to a position where the axial centers are in a straight line.

  Thereafter, as shown in FIG. 3 and FIG. 4, the bolt portion 21 of the welding bolt 5 that lowers the rod 4 of the second cylinder 3 and is attracted to the holding portion 6 is lowered through the welding hole 11 of the workpiece 10. After being inserted into the insertion hole 22 formed in the electrode 12 and having a cross section perpendicular to the axis, the operation of the vacuum generator 13 is stopped and suction of the holding part 6 is stopped.

  Thereafter, the rod 4 is raised, the rod 2 of the first cylinder 1 is retracted, and the welding bolt 5 is welded to the workpiece 10 by the welding device 7, and the next welding bolt 5 is held by the supply unit 8. 6 to adsorb.

  Further, details of the supply unit 8 will be described with reference to FIGS. 5 and 6. Reference numeral 23 denotes a guide member in which the tip of the hose 18 from the parts feeder 17 is inserted and fixed. The guide member 22 has a through hole 24 into which the hose 18 is inserted and fixed, and a holding portion below the through hole 24. An opening 33 having an opening on the 8 side is provided, and a guide portion 26 of the head 25 of the welding bolt 5 is formed in the lower portion of the through hole 24 and the opening 33 with an inclined surface that becomes lower toward the tip. Yes.

  Reference numeral 27 denotes a third cylinder which is a third drive device. A rod 28 which is a moving member of the third cylinder 27 is provided with a support rod 30 having a through hole 29 formed at the tip thereof. It is inserted into the gap between the member 23 and the base 31 so as to be able to advance and retreat.

  5, the welding bolt 5 supplied from the hose 18 has the bolt portion 21 in the through hole 29 of the support rod 30 with the rod 28 of the third cylinder 27 retracted. The welding bolt 5 is supported so that the lower surface of the head portion 25 is placed on the guide portion 26 and the lower end of the bolt portion 21 is not in contact with the base 31.

  When the support rod 30 is advanced by the rod 28 of the third cylinder 27, the welding bolt 5 advances while being inclined on the inclined surface of the guide portion 26, the welding bolt 5 passes through the opening 33, and the bolt is removed from the base 31. When the part 21 comes off, the lower surface of the head 25 is placed and supported on the support rod 30 and stops at a position where the suction hole 32 of the holding part 6 and the axial center of the welding bolt 5 are in a straight line.

  Thereafter, when a compressor (not shown) of the vacuum generator 13 is operated, the head 25 of the welding bolt 5 is adsorbed in the adsorption hole 32 of the holding unit 6 and the welding bolt 5 is adsorbed and held by the holding unit 6.

  The present invention is not limited to the above-described embodiment. For example, the holding portion 6 may hold the head portion 25 of the welding bolt 5 with claws.

  In the present invention, in order to insert the welding bolt 5 into the insertion hole 22 of the lower electrode 12 through the welding hole 11 of the work 10, the second driving device attached to the tip of the moving member 2 of the first driving device 1. Since only the holding portion 6 of the welding bolt 5 is moved up and down by 3, the second driving device 3 may have a small output.

  Further, the holding unit 6 can be reduced in size by adsorbing the holding unit 6 by vacuum.

  Furthermore, the second drive device 3 can be made smaller by using an air cylinder.

  As described above, according to the present invention, the second drive device can be manufactured with a small output and a small size, and a simple configuration at low cost.

DESCRIPTION OF SYMBOLS 1 1st drive device 2 Moving member 3 2nd drive device 4 Moving member 5 Welding bolt 6 Holding part 8 Supply part 9 Upper electrode 10 Workpiece 11 Welding hole 12 Lower electrode 22 Insertion hole

Claims (3)

  The holding part holding the welding bolt in the supply part is aligned between the upper electrode and the work by the first driving device so that the axis center of the upper electrode, the welding bolt, the work hole and the lower electrode insertion hole is in a straight line. The holding portion is lowered by the second driving device, and the bolt portion of the welding bolt is inserted into the insertion hole of the lower electrode through the welding hole of the workpiece to weld the welding bolt to the workpiece. In the welding bolt supply device, the second driving device is attached to the tip of the moving member of the first driving device, and the welding bolt holding portion is attached to the moving member that moves up and down of the second driving device. A welding bolt supply device.   The welding bolt supply device according to claim 1, wherein the holding portion holds the welding bolt by vacuum.   The welding bolt supply device according to claim 1 or 2, wherein the second driving device is an air cylinder.

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