WO2014049674A1 - Projection bolt feed device - Google Patents

Projection bolt feed device Download PDF

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Publication number
WO2014049674A1
WO2014049674A1 PCT/JP2012/074462 JP2012074462W WO2014049674A1 WO 2014049674 A1 WO2014049674 A1 WO 2014049674A1 JP 2012074462 W JP2012074462 W JP 2012074462W WO 2014049674 A1 WO2014049674 A1 WO 2014049674A1
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WO
WIPO (PCT)
Prior art keywords
bolt
support arm
base member
angle
electrode
Prior art date
Application number
PCT/JP2012/074462
Other languages
French (fr)
Japanese (ja)
Inventor
青山　好高
青山　省司
Original Assignee
Aoyama Yoshitaka
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aoyama Yoshitaka filed Critical Aoyama Yoshitaka
Priority to PCT/JP2012/074462 priority Critical patent/WO2014049674A1/en
Publication of WO2014049674A1 publication Critical patent/WO2014049674A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/14—Projection welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • B23K11/004—Welding of a small piece to a great or broad piece
    • B23K11/0046—Welding of a small piece to a great or broad piece the extremity of a small piece being welded to a base, e.g. cooling studs or fins to tubes or plates
    • B23K11/0053—Stud welding, i.e. resistive

Definitions

  • the welding in this invention is to weld a projection bolt to a steel plate part by electric resistance welding, and the present invention relates to a projection bolt supply device attached to a support arm of a welding machine.
  • Japanese Patent No. 3790887 and Japanese Patent No. 3700025 describe that a projection bolt held by a holding head at the tip of a supply rod is inserted into a receiving hole opened in an electrode, and a projection bolt supply device for this purpose Is attached to the arm member of the welder.
  • the bolt supply unit which is a main part of the projection bolt supply device, has a long form in which an air cylinder is integrated with a supply rod, and is attached in a state inclined in two directions with respect to the longitudinal direction of the arm member. ing. It is described that when the supply rod advances, the projection bolt becomes coaxial with the receiving hole, and the insertion driving mechanism is operated from this state to insert the projection bolt into the receiving hole.
  • an air cylinder which is an insertion drive mechanism for inserting a projection bolt into a receiving hole, is attached to the arm member.
  • the air cylinder for inserting the bolt is attached to the arm member, the bolt and the receiving hole are coaxial when the supply rod is extended by accurately adjusting the inclination of the bolt supply unit in the above two directions. It becomes very difficult to be.
  • the present invention has been provided to solve the above-described problems, and an object of the present invention is to provide a supply device in which the mounting angles of the two directions of the bolt supply unit can be set at the assembly stage of the projection bolt supply device.
  • the present invention is applied to a welding machine in which a projection bolt is electrically resistance welded to a steel plate part by a pair of electrodes
  • the projection bolt supply device according to the present invention is a support arm of a welding machine extending in a substantially horizontal direction.
  • the electrode is coupled in a state of standing upward in a substantially right angle direction from the support arm, and a receiving hole into which the projection bolt is inserted is provided coaxially with the electrode axis, and extends downward to the support arm.
  • a vertical base member having a shape, a horizontal base member having a substantially horizontal mounting surface at the lower portion of the vertical base member, and an insertion drive mechanism for performing forward / backward output in the same direction as the electrode axis on the mounting surface;
  • a support member attached to the insertion drive mechanism and being moved up and down by the insertion drive mechanism is connected to the insertion drive mechanism in a state of extending upward, and is advanced to the support member.
  • a bolt supply unit having an operation-type supply rod is attached in an inclined posture via an inclined attachment member, and a holding head for holding the projection bolt in an up-down posture is attached to the tip of the supply rod, and the attachment surface
  • the angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit viewed from above can be set as the first inclination angle.
  • the angle formed between the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit as viewed from the side is set as the second inclination angle.
  • the supply rod can be It said receiving hole and projection bolt when out is coaxially.
  • the projection bolt may be simply expressed as a bolt.
  • a vertical base member having a shape extending downward is coupled to the support arm
  • a horizontal base member having a substantially horizontal mounting surface is coupled to a lower portion of the vertical base member
  • the electrode is coupled to the mounting surface.
  • An insertion drive mechanism for advancing and retracting output in the same direction as the axis is attached, and a support member that is advanced and retracted in the vertical direction by the insertion drive mechanism is coupled to the insertion drive mechanism so as to extend upward, and the support member is moved forward and backward.
  • a bolt supply unit including the supply rod is attached in an inclined posture via an inclined attachment member, and a holding head for holding the bolt in a vertical posture is attached to the tip of the supply rod.
  • the attachment surface is positioned at a position lower than the support arm by the downward extension of the vertical base member, the insertion drive mechanism is attached thereto, and the support member is extended upward from the insertion drive mechanism.
  • the bolt supply unit is attached to the support member in an inclined posture via the inclined attachment member.
  • an angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit as viewed from above is defined as the first inclination angle. It can be determined accurately.
  • the tilt angle of the tilt mounting member is set to a predetermined angle, the angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit as viewed from the side is accurately determined as the second tilt angle. Can do.
  • the bolt and the receiving hole are coaxial when the supply rod is advanced.
  • the first inclination angle and the second inclination angle are determined in accordance with the height of the electrode standing from the support arm at the stage of assembling the supply device. it can. Therefore, it is only necessary to prepare a projection bolt supply device in which both angles are set, and to attach the vertical base member of the device to the support arm of the welding machine. Simplified.
  • the present invention is an apparatus invention as described above, but as can be seen from the embodiments described below, it can exist as a method invention specifying the adjustment process and the like.
  • FIG. 4A is a plan view of FIG. 4A.
  • FIG. 5A is a fragmentary sectional drawing of Drawing 5A.
  • FIG. 7 is a cross-sectional view taken along the line vii-vii of FIG. FIG.
  • FIG. 7 is a cross-sectional view taken along the line vii-vii in FIG.
  • FIG. 7 is a viii-viii sectional view of FIG. 6. It is a simplified diagram for explaining the first inclination angle ⁇ 1. It is a simplified diagram for explaining the second inclination angle ⁇ 2.
  • FIG. 6 is a simplified diagram showing the relationship between an axis XX, an axis YY, and an electrode axis OO. It is a side view of a C type welding machine. It is a side view of a stationary welding machine.
  • Embodiment 1 of the present invention show Embodiment 1 of the present invention.
  • the projection bolt supply device in the present embodiment is attached to a C-type welding machine, an X-type welding machine, a stationary welding machine, or the like that has various postures by a robot apparatus.
  • FIG. 10A shows a C-type welder
  • FIG. 10B shows a stationary welder.
  • main members to be described later are denoted by the same reference numerals.
  • the supply device is attached to an X-type welder generally called an X gun.
  • the entire projection bolt supply device is denoted by reference numeral 100.
  • a lower arm member 2 and an upper arm member 3 are coupled by a shaft 4, and the upper arm member 3 swings with respect to the lower arm member 2.
  • the lower arm member 2 is constituted by a main arm 5 to which sufficient strength is imparted and a support arm 6 which is inserted into and coupled to a distal end portion thereof, and an insertion portion 7 is indicated by a broken line.
  • the upper arm member 3 is composed of a main arm 8 to which sufficient strength is imparted and a support arm 9 that is inserted into and coupled to the tip of the main arm 8, and the insertion portion 10 is indicated by a broken line.
  • Projection pieces 12 and 13 are provided at the rear ends of both main arms 5 and 8, and an air cylinder 14 is attached therebetween.
  • the support arm 6 is arranged in a posture extending in the horizontal direction, and a rod-like electrode 15 is coupled to the tip of the support arm 6 while standing upward in a direction substantially perpendicular to the support arm 6, that is, in the vertical direction. .
  • the electrode axis of the electrode 15 is indicated by the symbol OO.
  • Reference numeral XX denotes an axis indicating the longitudinal direction of the support arm 6.
  • a rod-like electrode 16 that is paired with the electrode 15 is coupled to the upper support arm 9 downward.
  • the robot device 17 is a general one such as a 6-axis type, and is connected to the lower main arm 5.
  • the X-type welding machine 1 moves in the direction of up / down, left / right, and rotation according to the shape of the steel plate part.
  • the iron projection bolt 18 includes a shaft portion 19 in which a male screw is cut, a circular flange portion 20 formed coaxially therewith, and a flange portion 20 opposite to the shaft portion 19. It is comprised by the circular welding protrusion 21 formed in the surface center. If the dimensions of each part are illustrated, the diameter and length of the shaft part 19 are 6 mm and 24 mm, the diameter and thickness of the flange part 20 are 12 mm and 1.1 mm, respectively, and the diameter and height of the protrusions 21 are 6.5 mm and 1 mm.
  • the welding protrusion 21 may be a plurality of small “wart” -shaped ones.
  • a receiving hole 23 is formed in the central portion of the electrode 15 so as to be coaxial with the electrode axis OO of the lower electrode 15, and the shaft portion 19 is inserted therein by the operation of the bolt supply device 100. Yes.
  • a permanent magnet 24, which is a suction means, is arranged at the back of the receiving hole 23.
  • the steel plate part 25 having a curved portion or a bent portion may be held by a robot device, but here is held by a clamp device 27 attached to a stationary member 26 such as a machine frame.
  • a clamp device 27 attached to a stationary member 26 such as a machine frame.
  • the bolt supply device 100 is assembled in advance and the angle of a predetermined angle portion is set, and this pre-assembled one is coupled to the support arm 6.
  • a vertical base member 28 extending downward is coupled to the support arm 6.
  • the vertical base member 28 is made of a thick stainless steel plate.
  • the support arm 6 has a square cross-sectional shape at a connection portion 29 with the vertical base member 28, and an extended portion 30 connected thereto is inserted into the main arm 5 with a circular cross section.
  • Flat lateral side surfaces 31 and 32 erected substantially vertically are formed on both sides of the joint portion 29.
  • the lateral side surfaces 31 and 32 are in a positional relationship parallel to a virtual plane including the orthogonal electrode axis OO and the axis XX of the support arm 6.
  • each part of the support arm 6 are 400 mm in length, the distance between the lateral side surfaces 31 and 32 at the coupling point 29 is 42 mm, and the diameter of the extended portion 30 is 35 mm.
  • a coupling protrusion 33 is formed integrally with the vertical base member 28.
  • the coupling protrusion 33 is formed with the upper portion of the vertical base member 28 extended to the electrode 15 side.
  • the upper inner surface of the vertical base member 28 is in close contact with the lateral side surface 32 as shown in FIGS. 4A, 5A, 6 and 7A.
  • a plate-like auxiliary member 34 is arranged on the opposite side so as to face the coupling protrusion 33, and a coupling bolt 35 penetrating through the auxiliary member 34 is screwed into the coupling protrusion 33 for coupling. . That is, the vertical base member 28 is coupled to the support arm 6 by strongly sandwiching the lateral side surfaces 31 and 32 of the coupling location 29 by the coupling protrusion 33 and the auxiliary member 34.
  • the vertical base member 28 is coupled to the support arm 6 with a so-called sandwiching structure as described above, but may be coupled with a structure in which a bolt is screwed into the support arm 6 in addition to this.
  • the plate-like brackets 37 and 38 extending in the horizontal direction are joined to the upper end portion of the vertical base member 28 by welding or the like, and the vertical adjustment bolts 39 and 40 are screwed therein.
  • the protruding length of the vertical adjustment bolts 39 and 40 is adjusted after the coupling bolt 35 is slightly loosened, the vertical base member 28 and the auxiliary member 34 are displaced while being in close contact with the lateral side surfaces 31 and 32 (sliding)
  • a predetermined position is set. That is, the longitudinal direction of the support arm 6, that is, the inclination and parallelism of the vertical base member 28 with respect to the axis XX, and the movement in the XX direction are adjusted (see FIGS. 1, 6, and 8).
  • the coupling bolt 35 is firmly tightened, and at the same time, the lock nut 41 is tightened to prevent the vertical adjustment bolts 39 and 40 from loosening.
  • FIG. 7B is a cross-sectional view showing this.
  • Mediating members 87 and 88 extending in the direction of the axis XX are assembled to the left and right of the circular cross section 36, and both 87 and 88 are integrated by a connecting bolt 89.
  • the intermediate members 87 and 88 are formed with flat side surfaces similar to the side surfaces 31 and 32 shown in FIG. 7A, and the same reference numerals 31 and 32 are also given thereto.
  • the insides of the mediating members 87 and 88 are V-shaped, and by tightening the coupling bolts 89, line contact is made at four locations on the left and right.
  • the horizontal base member and the insertion drive mechanism will be described.
  • a horizontal base member 43 having a flat mounting surface 42 in a substantially horizontal direction is coupled to the lower portion of the vertical base member 28 extending downward.
  • the horizontal base member 43 is made of a thick plate made of stainless steel.
  • the former is bolted.
  • a plurality of long holes 85 extending in the vertical direction are provided in the lower part of the vertical base member 28, and fixing bolts 86 penetrating the long holes 85 are screwed into the horizontal base member 43 and fixed.
  • movement adjustment is performed with the long hole 85.
  • an insertion drive mechanism 44 is attached to the attachment surface 42.
  • the insertion drive mechanism 44 various types such as an advancing / retracting output type electric motor and an air cylinder can be adopted.
  • the insertion air cylinder 44 is used.
  • the direction of forward / backward output of the insertion air cylinder 44 is the same as that of the electrode axis OO, and as shown in FIGS.
  • the mounting plate 45 is coupled to the mounting surface 42 and the lower end of the piston rod 46 is mounted
  • the cylinder body 48 is advanced and retracted in the vertical direction by being fixed to the plate 45 and alternately supplying and discharging operating air to and from the upper side and the lower side of the piston 47.
  • the cylinder body 48 has a rectangular parallelepiped shape.
  • Reference numeral 52 denotes a cylinder chamber, and 49 and 50 denote air supply / discharge passages.
  • two guide rods 51 are fixed to the mounting plate 45, and the guide rods 51 slide through the cylinder body 48. Since the insertion air cylinder 44 is configured as described above, when operating air is supplied and discharged, the cylinder body 48 advances and retreats in the same direction as the electrode axis OO while the piston rod 46 is stopped.
  • the fixing bolts 53 are screwed in the vicinity of the four corners of the mounting plate 45 so that the insertion air cylinder 44 is coupled to the mounting surface 42.
  • four long holes 54 are opened in the horizontal base member 43.
  • the long holes 54 are arranged on an arc centered on the electrode axis OO.
  • the width dimension of the long hole 54 is larger than the diameter of the fixing bolt 53, so that the position of the long hole 54 can be adjusted in the longitudinal direction and the width direction.
  • a washer 55 having a size for closing the long hole 54 is employed.
  • the support member will be described.
  • the support member 56 is made of a thick plate made of stainless steel, and is coupled to the side surface of the insertion air cylinder 44 whose outer shape is a rectangular parallelepiped by bolting or the like. In this way, the horizontal base member 43 is positioned below the support arm 6, and the support member 56 rises upward from the insertion air cylinder 44 attached thereto.
  • the support member 56 is indicated by phantom lines in FIG. 4A so that the positional relationship with the vertical base member 28 can be easily understood.
  • the support member 56 is coupled to the lateral side surface of the cylinder body 48 of the insertion air cylinder 44. Instead, the cylinder body 48 is fixed to the mounting surface 42, and a mediating member is attached to the piston rod 46 protruding upward.
  • the support member 56 can also be coupled via the via.
  • a bolt supply unit 58 provided with an advancing / retracting supply rod 57 is attached to an upper portion of the support member 56 in an inclined posture via an inclination attachment member 59.
  • the inclined attachment member 59 may be directly fixed to the upper portion of the support member 56, and the bolt supply unit 58 may be attached to the inclined attachment member 59.
  • a member serving as an intermediary for attaching a bolt buffer unit 60 described later is employed.
  • the mediating member is the mediating bracket 62 fixed to the upper side surface of the support member 56 by bolting or the like, and is made by processing a stainless steel elongated block-shaped member. As shown in FIGS. 4A and 6, the intermediate bracket 62 has a notch 63 for securing a space for arranging the bolt supply unit 58 and a protrusion 64 for attaching the bolt buffer unit 60 from below. Is provided.
  • the bolt buffer unit will be explained.
  • the bolt buffer unit 60 is provided in a state in which an elongate switching chamber 65 is provided in a state where an inlet hole 67 and an outlet hole 68 are opposed to each other.
  • An inlet pipe 69 is welded to 66, and an outlet pipe 70 is press-fitted into the outlet hole 68.
  • the case 66 is fixed to the lower side of the projection 64 of the mediation bracket 62 by bolting or the like.
  • a switching member 71 is inserted into the case 66 in a slidable state, and is advanced and retracted by an air cylinder 72 fixed to the case 66.
  • the switching member 71 is provided with a solid stopper portion 73 and a through hole 74 opened next thereto.
  • the elongated bolt buffer unit 60 is arranged so that the air cylinder 72 is located outside the axis YY so as not to interfere with the air cylinder 82.
  • a supply hose 75 extending from the parts feeder 76 is connected to the inlet pipe 69.
  • the supply hose 75 is made of a synthetic resin such as a flexible urethane resin, and can follow even if the X-type welding machine 1 changes its direction in various directions.
  • the parts feeder 76 is provided with an escape unit 79 that sends out the bolts 18 one by one, and an injection pipe 80 that sends out the bolts 18 by air injection.
  • the tilt mounting member will be described.
  • the outlet pipe 70 fixed to the case 66 extends upward, passes through a passage hole 77 opened in the protrusion 64, and further passes through an inclined attachment member 59 placed on the protrusion 64.
  • the inclined attachment member 59 has a " ⁇ " shape that is obtained by bending a thick plate made of stainless steel, and the inclination angle of the attachment portion 78 is set to a predetermined angle.
  • the inclined mounting member 59 is fixed to the upper surface of the projection 64 by bolting or the like.
  • the inclined mounting member 59 has a function of setting the mounting angle of the bolt supply unit 58. Therefore, it is possible to adopt a structure other than the “ ⁇ ” shape.
  • the bolt supply unit will be described.
  • the bolt supply unit 58 is such that a supply rod 57 that moves forward and backward is advanced and retracted by an air cylinder 82, and the overall shape of the unit is long, and the longitudinal direction thereof is indicated by an axis YY.
  • a holding head 83 is coupled to the distal end portion of the supply rod 57.
  • the holding head 83 is formed with a circular concave portion 84 opened downward, and the flange portion 20 is seated on the inner end surface at the back.
  • the attractive force necessary for the seating is secured by a permanent magnet 81 embedded in the holding head 83. Since the shaft portion 19 of the seated bolt 18 is coaxial with the electrode axis OO, the holding head 83 holds the shaft portion 19 in the vertical direction, that is, in the vertical direction.
  • An air passage 90 is opened at the back of the recess 84, and when the tip of the shaft portion 19 slightly enters the receiving hole 23, air is injected so that the bolt 18 enters the back of the receiving hole 23. It has become.
  • FIG. 8 shows that the bolt 18 (the lower one of the two upper and lower bolts shown in the figure) sent from the parts feeder 76 by air injection hits the stopper portion 73 and receives a buffering action to reduce the air pressure. It shows a state of being stopped after receiving.
  • the switching member 71 is moved by the operation of the air cylinder 72 and the passage hole 74 is aligned with the inlet hole 67 and the outlet hole 70, the bolt 18 passes through the outlet pipe 70 and the inner part of the concave portion 84 of the holding head 83. Sit and hold.
  • the bolt held in this way is the upper one of the two upper and lower bolts shown in the figure.
  • the first tilt angle and the second tilt angle will be described.
  • the mounting plate 45 of the insertion air cylinder 44 is shifted while sliding on the mounting surface 42, and the mounting position of the insertion air cylinder 44 on the mounting surface 42 is set to a predetermined position.
  • the first inclination angle ⁇ 1 formed by the longitudinal direction (axis line XX) of the support arm 6 viewed from above and the longitudinal direction (axis line YY) of the bolt supply unit 58 is obtained.
  • the first inclination angle ⁇ 1 is set by changing the direction of the insertion air cylinder 44 on the mounting surface 42 within the allowable movement range of the long hole 54. Specifically, positioning is performed by swinging the insertion air cylinder 44 in an arc shape around the electrode axis OO.
  • the tilt angle of the tilt mounting member 59 by setting the tilt angle of the tilt mounting member 59 to a predetermined angle, the longitudinal direction (axis XX) of the support arm 6 as viewed from the side, and the bolt supply unit A second inclination angle ⁇ 2 formed by the longitudinal direction (axis YY) of 58 is obtained.
  • the setting of the second inclination angle ⁇ 2 is obtained by setting the inclination angle of the attachment portion 78 of the inclination attachment member 59 to a predetermined angle.
  • the inclination angle of the mounting portion 78 is mainly set by the height H (FIG. 1) of the electrode 15, but a fine angle adjustment is required in accordance with the change in the first inclination angle ⁇ 1. Therefore, it is desirable to prepare a comparison table showing the value of the second inclination angle ⁇ 2 for each height H.
  • the first inclination angle ⁇ 1 and the second inclination angle ⁇ 2 are set so that the bolt 18 held by the holding head 83 and the receiving hole 23 of the electrode 15 are in a coaxial state.
  • the shaft portion 19 held by the holding head 83 is positioned immediately above the axis XX of the support arm 6 as shown in FIGS. 9A and 9B. That is, the axis of the shaft portion 19 is in a state orthogonal to the axis XX.
  • the first inclination angle ⁇ 1 and the second inclination angle ⁇ 2 are set according to the height dimension H of the electrode 15, so that the bolt supply device 100 is attached to the support arm 6.
  • Such setting of both angles before the attachment to the support arm 6 is performed before the bolt supply device 100 is attached to the support arm 6, so that the axis XX of the support arm 6 virtually exists. That is, the second inclination angle ⁇ 2 is determined according to the distance from the lateral surface 32 to the axis XX, the height of the outlet pipe 70, the height H of the electrode 15, and the like.
  • the vertical base member 28 is attached to the support arm 6 by the sandwiching portion of the coupling protrusion 33 and the auxiliary member 34, and the shaft portion 19 and the receiving portion 19 shown in FIG. Coaxiality with the hole 23 is established.
  • the horizontal plane 32 is attached to the virtual plane.
  • the vertical base member 28 is adjusted by the connecting bolt 35 and the vertical adjustment bolts 39 and 40, so that the entire bolt supply device 100 is moved in the vertical direction (electrode axis OO direction), left and right direction (axis XX direction), Positioning over the tilt direction (swing direction with respect to XX) is performed accurately.
  • the deviation as shown in FIG. 9C is corrected if necessary.
  • the bolt supply device 100 is mounted without such a deviation, the mounting operation is simplified. Since it is such a simple mounting operation, the expression “at least” is made as “at least by setting the first inclination angle and the second inclination angle” in the claims.
  • the above operation can be easily performed by a generally adopted control method.
  • a predetermined operation can be ensured by combining an air switching valve that operates with a signal from the control device or the sequence circuit, a sensor that emits a signal at a predetermined position of the air cylinder, and transmits the signal to the control device.
  • the vertical base member 28 having a shape extending downward is coupled to the support arm 6, and the horizontal base member 43 having a substantially horizontal mounting surface 42 is coupled to the lower portion of the vertical base member 28.
  • An insertion air cylinder 44 which is an insertion drive means for performing forward / backward output in the same direction as the electrode axis OO, is attached to the attachment surface 42, and a support member that is advanced and retracted in the vertical direction by the insertion air cylinder 44.
  • 56 is coupled in a state of extending upward, and a bolt supply unit 58 having an advancing / retracting supply rod 57 is attached to the support member 56 in an inclined posture via an inclined attachment member 59, A holding head 83 that holds the bolt 18 in a vertical posture is attached to the tip.
  • the mounting surface 42 is positioned at a position lower than the support arm 6 by the downward extension of the vertical base member 28, and the insertion air cylinder 44 is attached thereto, and extends upward from the insertion air cylinder 44.
  • the support member 56 is arranged in a state, and the bolt supply unit 58 is attached to the support member 56 via the inclined attachment member 59 in an inclined posture.
  • the mounting position of the insertion air cylinder 44 on the mounting surface 42 can be finely adjusted.
  • the inclination angle of the inclination attaching member 59 can be freely set to a predetermined angle.
  • the longitudinal direction (axis XX) of the support arm 6 and the longitudinal direction of the bolt supply unit 58 as viewed from above.
  • the angle formed by the direction (axis YY) can be accurately obtained as the first inclination angle ⁇ 1.
  • the longitudinal direction of the support arm 6 (axis XX) and the longitudinal direction of the bolt supply unit 58 (axis Y- The angle formed by Y) can be accurately obtained as the second inclination angle ⁇ 2.
  • the bolt 18 and the receiving hole 23 are in a coaxial state when the supply rod 57 is advanced.
  • the first tilt angle ⁇ 1 and the first tilt angle ⁇ 1 are adjusted to the height of the electrode 15 raised from the support arm 6 at the stage of assembling the supply device 100.
  • Two inclination angles ⁇ 2 can be determined. Therefore, it is only necessary to prepare the bolt supply device 100 in which both angles ⁇ 1 and ⁇ 2 are set, and to attach the vertical base member 28 of the device to the support arm 6 of the welding machine 1, so that the bolt supply unit 58 for the support arm 6
  • the work of setting the inclination in two directions is simplified.
  • the flat lateral side surfaces 31 and 32 are formed on both sides of the connecting portion 29 so as to stand substantially vertically.
  • the lateral side surfaces 31 and 32 are in a positional relationship parallel to a virtual plane including the orthogonal electrode axis OO and the axis XX of the support arm 6. Therefore, the vertical base member 28 that is in close contact with the lateral side surface 32 can be slid on the lateral side surface 32 to adjust the position.
  • the vertical base is maintained while maintaining the state where the axis of the shaft portion 19 intersects the axis XX of the support arm 6 from above.
  • the position can be adjusted by sliding the member 28 to the lateral side surface 32. By such adjustment, since the coaxiality of the shaft portion 19 and the receiving hole 23 can be ensured only by the slide adjustment of the vertical base member 28, the adjustment work is simplified and highly accurate positioning can be performed.
  • the existing support arm 6 is sandwiched between the vertical base member 28 and the auxiliary member 34 and the bolt supply device 100 is mounted, no additional processing is required to reduce the cross-sectional area of the support arm 6 of the existing welding machine. This is unnecessary and does not reduce the rigidity of the support arm 6.
  • the entire bolt supply device 100 can be easily attached / detached by attaching / detaching the vertical base member 28, the bolt supply device 100 can be easily attached and removed, and the existing welding machines can be diversified.
  • a portion where the coupling portion 29 is sandwiched between the coupling protrusion 33 and the auxiliary member 34 and a high mass portion where the insertion air cylinder 44, the support member 56, the bolt supply unit 58, and the like are gathered are the length of the support arm 6. Seen away in direction. Because of such a separation, if the coupling bolt 35 is slightly loosened, the entire vertical base member 28 may be swung clockwise and tilted in FIGS. 1 and 8. However, as shown in FIG. 4A and FIG. 5A, the second bracket 38 is disposed at a location close to the insertion air cylinder 44 that is separated from the bracket 37, and the vertical adjustment bolt 40 screwed there is provided on the support arm 6. Since it is in contact with the upper surface, the vertical base member 28 can be prevented from tilting even when the clockwise tilting force as described above is applied. Therefore, the coaxiality between the bolt 18 and the receiving hole 23 can be accurately maintained.
  • the bolt supply unit attached to the support member is integrated to form a bolt supply device, and this bolt supply device is coupled to the support arm.
  • the lateral side surface of the support arm is in a positional relationship parallel to an imaginary plane including the electrode axis and the axis of the support arm that are orthogonal to each other. By doing so, it is possible to adjust the position while sliding the vertical base member on the lateral side surface.
  • the vertical base member functions as a mounting member for the bolt supply device
  • the lateral surface as described above is formed on the support arm by the mounting member for the projection bolt supply device including the bolt supply unit.
  • the mounting angles in the two directions of the bolt supply unit can be set at the assembly stage of the projection bolt supply apparatus. Therefore, it can be used in a wide range of industrial fields such as automobile body welding processes and home appliance sheet metal welding processes.

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  • Automatic Assembly (AREA)

Abstract

In a projection bolt feed device: a lateral base member (43) having a substantially horizontal mounting surface (42) is joined to the lower part of a downward-extending vertical base member (28); an insertion driving mechanism (44) for producing an advancing/retracting output is mounted on a mounting surface (42); a support member (56), which advances/retracts in the vertical direction, is joined to the insertion driving mechanism (44) in a state of extending upwards; a bolt feed unit (58) is mounted on the support member (56) with a tilt mounting member (59) interposed therebetween; and a first tilt angle (θ1) and a second tilt angle (θ2) are set, where the first tilt angle (θ1) is the angle formed between the bolt feed unit (58) and the support arm (6) when viewed from above and the second tilt angle (θ2) is the angle formed between the bolt deed unit (58) and the support arm (6) when viewed from the side, whereby the reception hole (23) and a bolt (18) held by a holding head (83) at the distal end of a feed rod (57) become coaxial with respect to each other when the feed rod (57) has advanced.

Description

プロジェクションボルト供給装置Projection bolt supply device
　この発明における溶接は、鋼板部品にプロジェクションボルトを電気抵抗溶接で溶接するものであり、本発明は溶接機の支持アームに取り付けられるプロジェクションボルト供給装置に関している。 The welding in this invention is to weld a projection bolt to a steel plate part by electric resistance welding, and the present invention relates to a projection bolt supply device attached to a support arm of a welding machine.
　特許第３７９０８８７号公報や特許第３７０００２５号公報には、供給ロッド先端部の保持ヘッドに保持されたプロジェクションボルトが電極に開けた受入孔に挿入されることが記載され、このためのプロジェクションボルト供給装置が溶接機のアーム部材に取り付けられている。前記プロジェクションボルト供給装置の主要部分であるボルト供給ユニットは、供給ロッドにエアシリンダが一体化された長尺な形態であり、前記アーム部材の長手方向に対して２方向に傾斜した状態で取り付けられている。供給ロッドが進出すると、プロジェクションボルトが前記受入孔と同軸状態になり、この状態から挿入駆動機構を動作させてプロジェクションボルトを受入孔に挿入することが記載されている。 Japanese Patent No. 3790887 and Japanese Patent No. 3700025 describe that a projection bolt held by a holding head at the tip of a supply rod is inserted into a receiving hole opened in an electrode, and a projection bolt supply device for this purpose Is attached to the arm member of the welder. The bolt supply unit, which is a main part of the projection bolt supply device, has a long form in which an air cylinder is integrated with a supply rod, and is attached in a state inclined in two directions with respect to the longitudinal direction of the arm member. ing. It is described that when the supply rod advances, the projection bolt becomes coaxial with the receiving hole, and the insertion driving mechanism is operated from this state to insert the projection bolt into the receiving hole.
特許第３７９０８８７号公報Japanese Patent No. 3790887 特許第３７０００２５号公報Japanese Patent No. 3700025
　上記特許文献に記載されている技術は、プロジェクションボルトを受入孔に挿入するための挿入駆動機構であるエアシリンダが、前記アーム部材に取り付けられている。このようにボルト挿入用のエアシリンダがアーム部材に取り付けられたものであると、ボルト供給ユニットの上記２方向の傾斜を正確に調整して、供給ロッドが伸長したときにボルトと受入孔が同軸となるようにすることが非常に難しくなる。 In the technique described in the above-mentioned patent document, an air cylinder, which is an insertion drive mechanism for inserting a projection bolt into a receiving hole, is attached to the arm member. Thus, if the air cylinder for inserting the bolt is attached to the arm member, the bolt and the receiving hole are coaxial when the supply rod is extended by accurately adjusting the inclination of the bolt supply unit in the above two directions. It becomes very difficult to be.
　つまり、前記エアシリンダがアーム部材に固定されているので、エアシリンダの固定箇所以外の箇所で２方向の傾斜を設定する必要があり、正確な角度が求めにくく、しかも角度調整の作業に長時間を要する。そして、角度調整に適した構造ではないので、微調整を行うことができない。さらに、アーム部材の適当な断面形状やその大きさが十分に確保できなければ、エアシリンダの取付けが困難となる。したがって、断面積の小さな細身のアーム部材であると、そこへ直接エアシリンダを取り付けることが困難となる。 In other words, since the air cylinder is fixed to the arm member, it is necessary to set inclinations in two directions at locations other than the location where the air cylinder is fixed, and it is difficult to obtain an accurate angle. Cost. Since the structure is not suitable for angle adjustment, fine adjustment cannot be performed. Furthermore, if the appropriate cross-sectional shape and size of the arm member cannot be secured sufficiently, it will be difficult to mount the air cylinder. Therefore, if it is a thin arm member with a small cross-sectional area, it becomes difficult to attach an air cylinder directly there.
　本発明は、上記の問題点を解決するために提供されたもので、ボルト供給ユニットの前記２方向の取付け角度が、プロジェクションボルト供給装置の組立段階で設定できる供給装置の提供を目的とする。 The present invention has been provided to solve the above-described problems, and an object of the present invention is to provide a supply device in which the mounting angles of the two directions of the bolt supply unit can be set at the assembly stage of the projection bolt supply device.
　本発明は、一対の電極によってプロジェクションボルトを鋼板部品に電気抵抗溶接をする溶接機に適用するものであって、本発明によるプロジェクションボルト供給装置は、ほぼ水平方向に延びている溶接機の支持アームに該支持アームからほぼ直角方向に上方へ起立した状態で電極が結合され、前記電極にプロジェクションボルトが挿入される受入孔が電極軸線と同軸の状態で設けられ、前記支持アームに下方へ延びた形状の縦基部材が結合され、前記縦基部材の下部にほぼ水平方向の取付け面を有する横基部材が結合され、前記取付け面に前記電極軸線と同方向に進退出力をする挿入駆動機構が取り付けられ、前記挿入駆動機構に該挿入駆動機構によって上下方向に進退する支持部材が上方に延びた状態で結合され、前記支持部材に進退動作式の供給ロッドを備えたボルト供給ユニットが傾斜取付け部材を介して傾斜した姿勢で取り付けられ、前記供給ロッドの先端にプロジェクションボルトを上下方向の姿勢で保持する保持ヘッドが取り付けられ、前記取付け面上における前記挿入駆動機構の取付け位置を所定位置に設定することにより、上方から見た前記支持アームの長手方向と前記ボルト供給ユニットの長手方向がなす角度を第１傾斜角度とすることができるように構成し、前記傾斜取付け部材の傾斜角度を所定角度に設定することにより、横側から見た前記支持アームの長手方向と前記ボルト供給ユニットの長手方向がなす角度を第２傾斜角度とすることができるように構成し、少なくとも前記第１傾斜角度と第２傾斜角度を設定することにより、前記供給ロッドが進出したときにプロジェクションボルトと前記受入孔が同軸状態になる。 The present invention is applied to a welding machine in which a projection bolt is electrically resistance welded to a steel plate part by a pair of electrodes, and the projection bolt supply device according to the present invention is a support arm of a welding machine extending in a substantially horizontal direction. The electrode is coupled in a state of standing upward in a substantially right angle direction from the support arm, and a receiving hole into which the projection bolt is inserted is provided coaxially with the electrode axis, and extends downward to the support arm. A vertical base member having a shape, a horizontal base member having a substantially horizontal mounting surface at the lower portion of the vertical base member, and an insertion drive mechanism for performing forward / backward output in the same direction as the electrode axis on the mounting surface; A support member attached to the insertion drive mechanism and being moved up and down by the insertion drive mechanism is connected to the insertion drive mechanism in a state of extending upward, and is advanced to the support member. A bolt supply unit having an operation-type supply rod is attached in an inclined posture via an inclined attachment member, and a holding head for holding the projection bolt in an up-down posture is attached to the tip of the supply rod, and the attachment surface By setting the mounting position of the insertion drive mechanism above to a predetermined position, the angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit viewed from above can be set as the first inclination angle. And the angle formed between the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit as viewed from the side is set as the second inclination angle. By configuring at least the first tilt angle and the second tilt angle, the supply rod can be It said receiving hole and projection bolt when out is coaxially.
　上記の発明を特定する記載において、上方、下方、縦、横、水平方向、上下方向、横側などの表現がなされているが、これはプロジェクションボルト供給装置全体がある姿勢で静止しているとみなして、発明を構成する部材の相対位置関係を明らかにするための表現である。実際には、後述のようにプロジェクションボルト供給装置全体が上下、左右、傾斜、回転など自在な方向に変位をする。 In the description specifying the above invention, expressions such as upper, lower, vertical, horizontal, horizontal, up and down, horizontal, etc. are made, but this means that the entire projection bolt supply device is stationary in a certain posture. This is an expression for clarifying the relative positional relationship of the members constituting the invention. Actually, as will be described later, the entire projection bolt supply device is displaced in any direction such as up / down, left / right, tilt, and rotation.
　以下の説明において、プロジェクションボルトを単にボルトと表現する場合もある。 In the following description, the projection bolt may be simply expressed as a bolt.
　上述のように、前記支持アームに下方へ延びた形状の縦基部材が結合され、前記縦基部材の下部にほぼ水平方向の取付け面を有する横基部材が結合され、前記取付け面に前記電極軸線と同方向に進退出力をする挿入駆動機構が取り付けられ、前記挿入駆動機構に該挿入駆動機構によって上下方向に進退する支持部材が上方に延びた状態で結合され、前記支持部材に進退動作式の供給ロッドを備えたボルト供給ユニットが傾斜取付け部材を介して傾斜した姿勢で取り付けられ、前記供給ロッドの先端にボルトを上下方向の姿勢で保持する保持ヘッドが取り付けられたものである。 As described above, a vertical base member having a shape extending downward is coupled to the support arm, a horizontal base member having a substantially horizontal mounting surface is coupled to a lower portion of the vertical base member, and the electrode is coupled to the mounting surface. An insertion drive mechanism for advancing and retracting output in the same direction as the axis is attached, and a support member that is advanced and retracted in the vertical direction by the insertion drive mechanism is coupled to the insertion drive mechanism so as to extend upward, and the support member is moved forward and backward. A bolt supply unit including the supply rod is attached in an inclined posture via an inclined attachment member, and a holding head for holding the bolt in a vertical posture is attached to the tip of the supply rod.
　つまり、前記取付け面が、縦基部材の下方への伸長によって支持アームよりも低い箇所に位置付けられ、そこに前記挿入駆動機構が取り付けられ、この挿入駆動機構から上方に延びた状態で支持部材が配置され、この支持部材に傾斜取付け部材を介してボルト供給ユニットが傾斜した姿勢で取り付けられる。このような構成により、前記取付け面上において挿入駆動機構の取付け位置を微調整することができる。また、前記傾斜取付け部材の傾斜角度を所定角度に自由に設定することができる。 That is, the attachment surface is positioned at a position lower than the support arm by the downward extension of the vertical base member, the insertion drive mechanism is attached thereto, and the support member is extended upward from the insertion drive mechanism. The bolt supply unit is attached to the support member in an inclined posture via the inclined attachment member. With such a configuration, the attachment position of the insertion drive mechanism can be finely adjusted on the attachment surface. Moreover, the inclination angle of the inclination attachment member can be freely set to a predetermined angle.
　したがって、前記取付け面上における前記挿入駆動機構の取付け位置を所定位置に設定することにより、上方から見た前記支持アームの長手方向と前記ボルト供給ユニットの長手方向がなす角度を第１傾斜角度として正確に求めることができる。同時に、前記傾斜取付け部材の傾斜角度を所定角度に設定することにより、横側から見た前記支持アームの長手方向と前記ボルト供給ユニットの長手方向がなす角度を第２傾斜角度として正確に求めることができる。このように、少なくとも前記第１傾斜角度と第２傾斜角度を設定することにより、前記供給ロッドが進出したときにボルトと前記受入孔が同軸状態になる。 Therefore, by setting the attachment position of the insertion drive mechanism on the attachment surface to a predetermined position, an angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit as viewed from above is defined as the first inclination angle. It can be determined accurately. At the same time, by setting the tilt angle of the tilt mounting member to a predetermined angle, the angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit as viewed from the side is accurately determined as the second tilt angle. Can do. Thus, by setting at least the first tilt angle and the second tilt angle, the bolt and the receiving hole are coaxial when the supply rod is advanced.
　とくに、プロジェクションボルト供給装置を溶接機の支持アームに取り付ける前に、同供給装置を組み立てる段階で、支持アームから起立した電極の高さに適合させて前記第１傾斜角度と第２傾斜角度が確定できる。したがって、両角度がセットされたプロジェクションボルト供給装置を準備し、同装置の縦基部材を溶接機の支持アームに取り付けるだけでよいから、支持アームに対するボルト供給ユニットの２方向の傾斜設定の作業が簡素化される。 In particular, before the projection bolt supply device is attached to the support arm of the welding machine, the first inclination angle and the second inclination angle are determined in accordance with the height of the electrode standing from the support arm at the stage of assembling the supply device. it can. Therefore, it is only necessary to prepare a projection bolt supply device in which both angles are set, and to attach the vertical base member of the device to the support arm of the welding machine. Simplified.
　本発明は、上述のような装置発明であるが、以下に記載する実施例から明らかなように、調整過程等を特定した方法発明として存在させることができる。 The present invention is an apparatus invention as described above, but as can be seen from the embodiments described below, it can exist as a method invention specifying the adjustment process and the like.
装置全体を示す側面図である。It is a side view which shows the whole apparatus. 本装置がＸ型電気抵抗溶接機に取り付けられた側面図である。It is a side view where this device was attached to an X type electric resistance welding machine. ボルトの溶接状態を示す断面図である。It is sectional drawing which shows the welding state of a volt | bolt. 縦基部材、横基部材、支持部材などを示す立体図である。It is a three-dimensional view showing a vertical base member, a horizontal base member, a support member, and the like. 図４Ａの部分断面図である。It is a fragmentary sectional view of FIG. 4A. 図４Ａの平面図である。FIG. 4B is a plan view of FIG. 4A. 図５ＡのＢ－Ｂ断面図である。It is BB sectional drawing of FIG. 5A. 図５Ａの部分断面図である。It is a fragmentary sectional view of Drawing 5A. ボルト供給ユニットを外して示した平面図である。It is the top view which removed and showed the volt | bolt supply unit. 図６のvii－vii断面図であって支持アームの結合箇所の断面が四角形の場合を示す。FIG. 7 is a cross-sectional view taken along the line vii-vii of FIG. 図６のvii－vii断面図であって支持アームの結合箇所の断面が円形の場合を示す。FIG. 7 is a cross-sectional view taken along the line vii-vii in FIG. 図６のviii－viii断面図である。FIG. 7 is a viii-viii sectional view of FIG. 6. 第１傾斜角度θ１を説明するための簡略図である。It is a simplified diagram for explaining the first inclination angle θ1. 第２傾斜角度θ２を説明するための簡略図である。It is a simplified diagram for explaining the second inclination angle θ2. 軸線Ｘ－Ｘと軸線Ｙ－Ｙと電極軸線Ｏ－Ｏの関係を示す簡略図である。FIG. 6 is a simplified diagram showing the relationship between an axis XX, an axis YY, and an electrode axis OO. Ｃ型溶接機の側面図である。It is a side view of a C type welding machine. 定置式溶接機の側面図である。It is a side view of a stationary welding machine.
　１　　Ｘ型溶接機
　６　　支持アーム
１５　　電極
１７　　ロボット装置
１８　　プロジェクションボルト
１９　　軸部
Ｏ－Ｏ　電極軸線
Ｘ－Ｘ　支持アームの軸線
２３　　受入孔
２５　　鋼板部品
２８　　縦基部材
２９　　結合箇所
３０　　延長部分
３１　　横側面
３２　　横側面
３３　　結合突部
３４　　補助部材
３５　　結合ボルト
４２　　取付け面
４３　　横基部材
４４　　挿入駆動手段、挿入エアシリンダ
４８　　シリンダボディ
５６　　支持部材
５７　　供給ロッド
５８　　ボルト供給ユニット
５９　　傾斜取付け部材
６０　　ボルト緩衝ユニット
Ｙ－Ｙ　ボルト供給ユニットの軸線
θ１　　第１傾斜角度
θ２　　第２傾斜角度
Ｈ　　　電極の高さ
１００　ボルト供給装置 DESCRIPTION OF SYMBOLS 1 X-type welding machine 6 Support arm 15 Electrode 17 Robot apparatus 18 Projection bolt 19 Shaft OO Electrode axis XX Support arm axis 23 Receiving hole 25 Steel plate part 28 Vertical base member 29 Joint part 30 Extension part 31 Side surface 32 lateral side 33 coupling protrusion 34 auxiliary member 35 coupling bolt 42 mounting surface 43 horizontal base member 44 insertion drive means, insertion air cylinder 48 cylinder body 56 support member 57 supply rod 58 bolt supply unit 59 inclined mounting member 60 bolt buffer unit Y -Y Bolt supply unit axis θ1 first inclination angle θ2 second inclination angle H electrode height 100 bolt supply device
　つぎに、本発明のプロジェクションボルト供給装置を実施するための形態を説明する。 Next, a mode for carrying out the projection bolt supply device of the present invention will be described.
　図１～図９は、本発明の実施例１を示す。 1 to 9 show Embodiment 1 of the present invention.
　本実施例におけるプロジェクションボルト供給装置は、ロボット装置によって種々な姿勢となるＣ型溶接機やＸ型溶接機、あるいは定置式溶接機などに取り付けられる。図１０ＡにＣ型溶接機が示され、図１０Ｂに定置式溶接機が示されている。これらの図で後述の主な部材が同様な符号を付して示されている。この実施例では、一般的にＸガンと呼ばれているＸ型溶接機に本供給装置が取り付けられている。 The projection bolt supply device in the present embodiment is attached to a C-type welding machine, an X-type welding machine, a stationary welding machine, or the like that has various postures by a robot apparatus. FIG. 10A shows a C-type welder, and FIG. 10B shows a stationary welder. In these drawings, main members to be described later are denoted by the same reference numerals. In this embodiment, the supply device is attached to an X-type welder generally called an X gun.
　最初に、Ｘ型溶接機について説明する。 First, the X-type welder will be described.
　図２に示すように、プロジェクションボルト供給装置全体は符号１００で示されている。Ｘ型溶接機１は、下アーム部材２と上アーム部材３が軸４で結合され、下アーム部材２に対して上アーム部材３が揺動するようになっている。下アーム部材２は、十分な強度が付与された主アーム５と、その先端部に差し込まれて結合されている支持アーム６によって構成され、破線で差込み部分７が示されている。また、上アーム部材３は、十分な強度が付与された主アーム８と、その先端部に差し込まれて結合されている支持アーム９によって構成され、破線で差込み部分１０が示されている。 As shown in FIG. 2, the entire projection bolt supply device is denoted by reference numeral 100. In the X-type welding machine 1, a lower arm member 2 and an upper arm member 3 are coupled by a shaft 4, and the upper arm member 3 swings with respect to the lower arm member 2. The lower arm member 2 is constituted by a main arm 5 to which sufficient strength is imparted and a support arm 6 which is inserted into and coupled to a distal end portion thereof, and an insertion portion 7 is indicated by a broken line. The upper arm member 3 is composed of a main arm 8 to which sufficient strength is imparted and a support arm 9 that is inserted into and coupled to the tip of the main arm 8, and the insertion portion 10 is indicated by a broken line.
　両主アーム５、８の後端部に突片１２、１３が設けられ、その間にエアシリンダ１４が取り付けてある。このエアシリンダ１４が出力すると、上アーム部材３が軸４を中心にして揺動する。前記支持アーム６は水平方向に延びた姿勢で配置してあり、その先端部に支持アーム６に対してほぼ直角方向、すなわち鉛直方向に上方へ起立した状態で棒状の電極１５が結合してある。電極１５の電極軸線は、符号Ｏ－Ｏで示してある。符号Ｘ－Ｘは、支持アーム６の長手方向を示す軸線である。また、上側の前記支持アーム９には前記電極１５と対をなす棒状の電極１６が下向きに結合してある。 Projection pieces 12 and 13 are provided at the rear ends of both main arms 5 and 8, and an air cylinder 14 is attached therebetween. When the air cylinder 14 outputs, the upper arm member 3 swings about the shaft 4. The support arm 6 is arranged in a posture extending in the horizontal direction, and a rod-like electrode 15 is coupled to the tip of the support arm 6 while standing upward in a direction substantially perpendicular to the support arm 6, that is, in the vertical direction. . The electrode axis of the electrode 15 is indicated by the symbol OO. Reference numeral XX denotes an axis indicating the longitudinal direction of the support arm 6. Further, a rod-like electrode 16 that is paired with the electrode 15 is coupled to the upper support arm 9 downward.
　ロボット装置１７は６軸タイプのような一般的なものであり、下側の主アーム５に結合してある。このロボット装置１７の動作で、鋼板部品の形状に合わせてＸ型溶接機１が上下、左右、回転などの方向に移動する。 The robot device 17 is a general one such as a 6-axis type, and is connected to the lower main arm 5. By the operation of the robot device 17, the X-type welding machine 1 moves in the direction of up / down, left / right, and rotation according to the shape of the steel plate part.
　つぎに、プロジェクションボルトについて説明する。 Next, the projection bolt will be described.
　図３に示すように、鉄製のプロジェクションボルト１８は、雄ねじが切られた軸部１９と、それと同軸状態で形成された円形のフランジ部２０と、軸部１９とは反対側のフランジ部２０の表面中央に形成された円形の溶着用突起２１によって構成されている。各部の寸法を例示するならば、軸部１９の直径と長さがそれぞれ６ｍｍと２４ｍｍ、フランジ部２０の直径と厚さがそれぞれ１２ｍｍと１．１ｍｍ、溶着用突起２１の直径と隆起高さが６．５ｍｍと１ｍｍである。なお、溶着用突起２１は、小さな「いぼ」状のものを複数個配置したものでもよい。 As shown in FIG. 3, the iron projection bolt 18 includes a shaft portion 19 in which a male screw is cut, a circular flange portion 20 formed coaxially therewith, and a flange portion 20 opposite to the shaft portion 19. It is comprised by the circular welding protrusion 21 formed in the surface center. If the dimensions of each part are illustrated, the diameter and length of the shaft part 19 are 6 mm and 24 mm, the diameter and thickness of the flange part 20 are 12 mm and 1.1 mm, respectively, and the diameter and height of the protrusions 21 are 6.5 mm and 1 mm. The welding protrusion 21 may be a plurality of small “wart” -shaped ones.
　つぎに、プロジェクションボルトの溶接状態を説明する。 Next, the welding state of the projection bolt will be described.
　下側の電極１５の電極軸線Ｏ－Ｏと同軸の状態で電極１５の中央部に受入孔２３が開けてあり、ここにボルト供給装置１００の動作で軸部１９が挿入されるようになっている。挿入されたボルト１８が受入孔２３から抜け落ちないようにするために、吸引手段である永久磁石２４が受入孔２３の奥部に配置してある。 A receiving hole 23 is formed in the central portion of the electrode 15 so as to be coaxial with the electrode axis OO of the lower electrode 15, and the shaft portion 19 is inserted therein by the operation of the bolt supply device 100. Yes. In order to prevent the inserted bolt 18 from falling out of the receiving hole 23, a permanent magnet 24, which is a suction means, is arranged at the back of the receiving hole 23.
　湾曲部や屈曲部を有する鋼板部品２５はロボット装置で保持されてもよいが、ここでは機枠などの静止部材２６に取り付けたクランプ装置２７で保持されている。ボルト１８が挿入された電極１５と他方の電極１６によって、溶着用突起２１に鋼板部品２５が加圧されて溶接電流が通電されると、溶着用突起２１が鋼板部品２５に溶着する。 The steel plate part 25 having a curved portion or a bent portion may be held by a robot device, but here is held by a clamp device 27 attached to a stationary member 26 such as a machine frame. When the steel plate component 25 is pressurized to the welding projection 21 by the electrode 15 into which the bolt 18 is inserted and the other electrode 16 and a welding current is applied, the welding projection 21 is welded to the steel plate component 25.
　つぎに、ボルト供給装置の部分構造を順次説明する。 Next, the partial structure of the bolt supply device will be sequentially described.
　縦基部材などの配置構造を説明する。 The arrangement structure of the vertical base member will be described.
　図６から分かるように、ボルト供給装置１００は、予め組み立てられて所定の角度部分の角度設定がなされるものであり、この予備的に組み立てられたものが支持アーム６に結合される。 As can be seen from FIG. 6, the bolt supply device 100 is assembled in advance and the angle of a predetermined angle portion is set, and this pre-assembled one is coupled to the support arm 6.
　前記支持アーム６に、下方へ延びた形状の縦基部材２８が結合されている。この縦基部材２８は、分厚いステンレス鋼製の板材で作られている。支持アーム６は、縦基部材２８との結合箇所２９が図７Ａに示すように、四角い断面形状とされ、それに連なる延長部分３０が断面円形で前記主アーム５に差し込まれている。前記結合箇所２９の両横にほぼ鉛直方向に起立している平坦な横側面３１、３２が形成されている。この横側面３１、３２は、直交している電極軸線Ｏ－Ｏと支持アーム６の軸線Ｘ－Ｘを含む仮想平面に対して、平行な位置関係とされている。 A vertical base member 28 extending downward is coupled to the support arm 6. The vertical base member 28 is made of a thick stainless steel plate. As shown in FIG. 7A, the support arm 6 has a square cross-sectional shape at a connection portion 29 with the vertical base member 28, and an extended portion 30 connected thereto is inserted into the main arm 5 with a circular cross section. Flat lateral side surfaces 31 and 32 erected substantially vertically are formed on both sides of the joint portion 29. The lateral side surfaces 31 and 32 are in a positional relationship parallel to a virtual plane including the orthogonal electrode axis OO and the axis XX of the support arm 6.
　支持アーム６の各部の寸法は、長さが４００ｍｍ、結合箇所２９における横側面３１と３２の間隔が４２ｍｍ、延長部分３０の直径が３５ｍｍである。 The dimensions of each part of the support arm 6 are 400 mm in length, the distance between the lateral side surfaces 31 and 32 at the coupling point 29 is 42 mm, and the diameter of the extended portion 30 is 35 mm.
　前記縦基部材２８と一体に結合突部３３が形成されている。この結合突部３３は縦基部材２８の上部を電極１５側に延ばした状態で形成されている。縦基部材２８の上部内面を、図４Ａ、５Ａ、６および７Ａに示すように、横側面３２に密着させてある。そして、反対側に前記結合突部３３に向かい合った状態で板状の補助部材３４が配置され、この補助部材３４側を貫通させた結合ボルト３５を結合突部３３にねじ込んで結合がなされている。すなわち、結合突部３３と補助部材３４によって結合箇所２９の両横側面３１、３２を強く挟み付けて、縦基部材２８が支持アーム６に結合されている。 A coupling protrusion 33 is formed integrally with the vertical base member 28. The coupling protrusion 33 is formed with the upper portion of the vertical base member 28 extended to the electrode 15 side. The upper inner surface of the vertical base member 28 is in close contact with the lateral side surface 32 as shown in FIGS. 4A, 5A, 6 and 7A. A plate-like auxiliary member 34 is arranged on the opposite side so as to face the coupling protrusion 33, and a coupling bolt 35 penetrating through the auxiliary member 34 is screwed into the coupling protrusion 33 for coupling. . That is, the vertical base member 28 is coupled to the support arm 6 by strongly sandwiching the lateral side surfaces 31 and 32 of the coupling location 29 by the coupling protrusion 33 and the auxiliary member 34.
　なお、縦基部材２８は、上記のようにいわゆる挟み付け構造で支持アーム６に結合されているが、これ以外に支持アーム６にボルトをねじ込むような構造で結合することも可能である。 The vertical base member 28 is coupled to the support arm 6 with a so-called sandwiching structure as described above, but may be coupled with a structure in which a bolt is screwed into the support arm 6 in addition to this.
　前記縦基部材２８の上端部に水平方向に延びた板状のブラケット３７、３８が溶接などで結合され、そこに上下調整ボルト３９、４０がねじ込んである。上記結合ボルト３５をわずかに緩めてから、この上下調整ボルト３９、４０の突出長さを調整すると、縦基部材２８や補助部材３４が横側面３１、３２に密着したままずれ動いて（摺動して）所定の位置が設定される。つまり、支持アーム６の長手方向、すなわち軸線Ｘ－Ｘに対する縦基部材２８の傾きや平行度合、Ｘ－Ｘ方向の移動の調整がなされる（図１、図６、図８参照）。このような調整が完了すると、結合ボルト３５を強固に締め付け、同時にロックナット４１を締め付けて上下調整ボルト３９、４０の緩み止めがなされる。 The plate- like brackets 37 and 38 extending in the horizontal direction are joined to the upper end portion of the vertical base member 28 by welding or the like, and the vertical adjustment bolts 39 and 40 are screwed therein. When the protruding length of the vertical adjustment bolts 39 and 40 is adjusted after the coupling bolt 35 is slightly loosened, the vertical base member 28 and the auxiliary member 34 are displaced while being in close contact with the lateral side surfaces 31 and 32 (sliding) A predetermined position is set. That is, the longitudinal direction of the support arm 6, that is, the inclination and parallelism of the vertical base member 28 with respect to the axis XX, and the movement in the XX direction are adjusted (see FIGS. 1, 6, and 8). When such adjustment is completed, the coupling bolt 35 is firmly tightened, and at the same time, the lock nut 41 is tightened to prevent the vertical adjustment bolts 39 and 40 from loosening.
　支持アーム６が全長にわたって断面が円形であるときには、上記の横側面３１，３２を別の部材を介して形成する。図７Ｂはそれを示す断面図であり、円形断面部３６の左右に軸線Ｘ－Ｘ方向に延びる仲介部材８７、８８を組み付けてこの両者８７、８８を結合ボルト８９で一体化してある。この仲介部材８７、８８には前述の図７Ａに示した横側面３１、３２と同様な平坦な横側面が形成してあり、これらにも同じ符号３１、３２が付されている。仲介部材８７、８８の内側はＶ字型形状とされ、結合ボルト８９を締め付けることにより、左右４箇所で線接触がなされる。 When the support arm 6 has a circular cross section over the entire length, the lateral side surfaces 31 and 32 are formed via another member. FIG. 7B is a cross-sectional view showing this. Mediating members 87 and 88 extending in the direction of the axis XX are assembled to the left and right of the circular cross section 36, and both 87 and 88 are integrated by a connecting bolt 89. The intermediate members 87 and 88 are formed with flat side surfaces similar to the side surfaces 31 and 32 shown in FIG. 7A, and the same reference numerals 31 and 32 are also given thereto. The insides of the mediating members 87 and 88 are V-shaped, and by tightening the coupling bolts 89, line contact is made at four locations on the left and right.
　横基部材と挿入駆動機構について説明する。 The horizontal base member and the insertion drive mechanism will be described.
　図４Ａに示すように、下方に延びた縦基部材２８の下部に、ほぼ水平方向の平坦な取付け面４２を有する横基部材４３が結合してある。この横基部材４３は、ステンレス鋼製の分厚い板材で作られている。前述の結合ボルト３５や上下調整ボルト３９、４０を調整することにより、取付け面４２を完全な水平方向としたり、必要に応じてわずかに傾けたりすることができる。 As shown in FIG. 4A, a horizontal base member 43 having a flat mounting surface 42 in a substantially horizontal direction is coupled to the lower portion of the vertical base member 28 extending downward. The horizontal base member 43 is made of a thick plate made of stainless steel. By adjusting the coupling bolt 35 and the vertical adjustment bolts 39 and 40 described above, the mounting surface 42 can be made to be in a completely horizontal direction, or can be slightly tilted as necessary.
　縦基部材２８の下部に横基部材４３を結合する構造としては、ボルト付けや溶接など種々なものが採用できる。ここでは、前者のボルト付けである。図４Ｂに示すように、縦基部材２８の下部に上下方向に延びる複数の長孔８５を設け、この長孔８５を貫通させた固定ボルト８６を横基部材４３にねじ込んで固定する。取付け面４２の位置を変えるときには、長孔８５で移動調整を行う。 As the structure for connecting the horizontal base member 43 to the lower part of the vertical base member 28, various things such as bolting and welding can be adopted. Here, the former is bolted. As shown in FIG. 4B, a plurality of long holes 85 extending in the vertical direction are provided in the lower part of the vertical base member 28, and fixing bolts 86 penetrating the long holes 85 are screwed into the horizontal base member 43 and fixed. When the position of the mounting surface 42 is changed, movement adjustment is performed with the long hole 85.
　図１に示すように、ボルト１８の軸部１９を電極１５の受入孔２３に挿入するためには、軸部１９と電極軸線Ｏ－Ｏを同軸にしてから軸部１９を受入孔２３内に挿入する。この挿入を行うために、挿入駆動機構４４が取付け面４２に取り付けてある。この挿入駆動機構４４は、進退出力式の電動モータやエアシリンダなど種々なものが採用でき、ここでは挿入エアシリンダ４４が使用されている。挿入エアシリンダ４４の進退出力の方向は前記電極軸線Ｏ－Ｏと同方向であり、図５Ａおよび５Ｂに示すように、取付け板４５が取付け面４２に結合され、ピストンロッド４６の下端部は取付け板４５に固定され、ピストン４７の上側と下側に交互に動作空気を給排することにより、シリンダボディ４８が上下方向に進退するようになっている。シリンダボディ４８は外形が直方体とされている。なお、符号５２はシリンダ室、４９、５０は空気の給排通路である。 As shown in FIG. 1, in order to insert the shaft portion 19 of the bolt 18 into the receiving hole 23 of the electrode 15, the shaft portion 19 and the electrode axis line OO are made coaxial, and then the shaft portion 19 is placed in the receiving hole 23. insert. In order to perform this insertion, an insertion drive mechanism 44 is attached to the attachment surface 42. As the insertion drive mechanism 44, various types such as an advancing / retracting output type electric motor and an air cylinder can be adopted. Here, the insertion air cylinder 44 is used. The direction of forward / backward output of the insertion air cylinder 44 is the same as that of the electrode axis OO, and as shown in FIGS. 5A and 5B, the mounting plate 45 is coupled to the mounting surface 42 and the lower end of the piston rod 46 is mounted The cylinder body 48 is advanced and retracted in the vertical direction by being fixed to the plate 45 and alternately supplying and discharging operating air to and from the upper side and the lower side of the piston 47. The cylinder body 48 has a rectangular parallelepiped shape. Reference numeral 52 denotes a cylinder chamber, and 49 and 50 denote air supply / discharge passages.
　前記シリンダボディ４８を滑らかに進退させるために、取付け板４５に２本のガイドロッド５１が固定され、このガイドロッド５１がシリンダボディ４８を貫通して摺動するようになっている。挿入エアシリンダ４４は上記のような構成になっているので、動作空気が給排されると、ピストンロッド４６は停止したままシリンダボディ４８が電極軸線Ｏ－Ｏと同方向に進退する。 In order to smoothly advance and retract the cylinder body 48, two guide rods 51 are fixed to the mounting plate 45, and the guide rods 51 slide through the cylinder body 48. Since the insertion air cylinder 44 is configured as described above, when operating air is supplied and discharged, the cylinder body 48 advances and retreats in the same direction as the electrode axis OO while the piston rod 46 is stopped.
　取付け板４５の四隅近傍にそれぞれ固定ボルト５３をねじ込んで挿入エアシリンダ４４が取付け面４２に結合される。この結合において挿入エアシリンダ４４の取付け位置を調整するために、図４Ａや図５Ｃに示すように、４つの長孔５４が横基部材４３に開けられている。この長孔５４は、電極軸線Ｏ－Ｏを中心にした円弧上に配列されている。長孔５４の幅寸法は固定ボルト５３の直径よりも大きくしてあり、こうすることによって長孔５４の長手方向と幅方向に位置調整が行えるようになっている。長孔５４の大きさを固定ボルト５３の直径よりも十分に大きくした場合には、長孔５４を塞ぐ大きさのワッシャ５５を採用する。 The fixing bolts 53 are screwed in the vicinity of the four corners of the mounting plate 45 so that the insertion air cylinder 44 is coupled to the mounting surface 42. In order to adjust the mounting position of the insertion air cylinder 44 in this connection, as shown in FIGS. 4A and 5C, four long holes 54 are opened in the horizontal base member 43. The long holes 54 are arranged on an arc centered on the electrode axis OO. The width dimension of the long hole 54 is larger than the diameter of the fixing bolt 53, so that the position of the long hole 54 can be adjusted in the longitudinal direction and the width direction. When the size of the long hole 54 is sufficiently larger than the diameter of the fixing bolt 53, a washer 55 having a size for closing the long hole 54 is employed.
　支持部材について説明する。 The support member will be described.
　前記挿入駆動機構である挿入エアシリンダ４４に、該挿入エアシリンダ４４によって上下方向、すなわち電極軸線Ｏ－Ｏ方向に進退する支持部材５６が上方に延びた状態で結合されている。この支持部材５６はステンレス鋼製の分厚い板材で作られており、外形が直方体とされた挿入エアシリンダ４４の横側面にボルト付けなどで結合してある。このようにして横基部材４３は支持アーム６よりも下方に位置し、そこに取り付けられた挿入エアシリンダ４４から上方に向かって支持部材５６が立ち上がっている。 A support member 56 that is advanced and retracted in the vertical direction, that is, the electrode axis OO direction, is coupled to the insertion air cylinder 44 that is the insertion drive mechanism by the insertion air cylinder 44 so as to extend upward. The support member 56 is made of a thick plate made of stainless steel, and is coupled to the side surface of the insertion air cylinder 44 whose outer shape is a rectangular parallelepiped by bolting or the like. In this way, the horizontal base member 43 is positioned below the support arm 6, and the support member 56 rises upward from the insertion air cylinder 44 attached thereto.
　前記支持部材５６は、図４Ａに仮想線で示され、縦基部材２８との位置関係を理解しやすくしている。また、支持部材５６は挿入エアシリンダ４４のシリンダボディ４８の横側面に結合されているが、これに換えてシリンダボディ４８を取付け面４２に固定し、上方に突き出したピストンロッド４６に仲介部材を介して支持部材５６を結合することもできる。 The support member 56 is indicated by phantom lines in FIG. 4A so that the positional relationship with the vertical base member 28 can be easily understood. The support member 56 is coupled to the lateral side surface of the cylinder body 48 of the insertion air cylinder 44. Instead, the cylinder body 48 is fixed to the mounting surface 42, and a mediating member is attached to the piston rod 46 protruding upward. The support member 56 can also be coupled via the via.
　ボルト供給ユニットの取り付けについて説明する。 取 り 付 け Explain the installation of the bolt supply unit.
　図１に示すように、前記支持部材５６の上部に、進退動作式の供給ロッド５７を備えたボルト供給ユニット５８が、傾斜取付け部材５９を介して傾斜した姿勢で取り付けられている。前記ボルト供給ユニット５８を支持部材５６の上部に取り付けるに当たって、支持部材５６の上部に前記傾斜取付け部材５９を直接固定して、この傾斜取付け部材５９にボルト供給ユニット５８を取り付けても良いが、ここでは後述のボルト緩衝ユニット６０の取り付けを行うための仲介となる部材が採用されている。 As shown in FIG. 1, a bolt supply unit 58 provided with an advancing / retracting supply rod 57 is attached to an upper portion of the support member 56 in an inclined posture via an inclination attachment member 59. In attaching the bolt supply unit 58 to the upper portion of the support member 56, the inclined attachment member 59 may be directly fixed to the upper portion of the support member 56, and the bolt supply unit 58 may be attached to the inclined attachment member 59. Then, a member serving as an intermediary for attaching a bolt buffer unit 60 described later is employed.
　上記の仲介となる部材は、支持部材５６の上部側面にボルト付けなどで固定された仲介ブラケット６２であり、ステンレス鋼製の細長いブロック状の部材を加工して作られている。この仲介ブラケット６２には、図４Ａおよび図６に示すように、ボルト供給ユニット５８の配置空間を確保するための切欠き部６３と、ボルト緩衝ユニット６０を下側から取り付けるための突部６４が設けられている。 The mediating member is the mediating bracket 62 fixed to the upper side surface of the support member 56 by bolting or the like, and is made by processing a stainless steel elongated block-shaped member. As shown in FIGS. 4A and 6, the intermediate bracket 62 has a notch 63 for securing a space for arranging the bolt supply unit 58 and a protrusion 64 for attaching the bolt buffer unit 60 from below. Is provided.
　ボルト緩衝ユニットについて説明する。 The bolt buffer unit will be explained.
　前記ボルト緩衝ユニット６０は、図８に示すように、細長い切換室６５が設けられたケース６６に、入口孔６７と出口孔６８が対向した状態で設けられ、入口孔６７に連通した状態でケース６６に入口管６９が溶接してあり、出口孔６８に出口管７０が圧入してある。このケース６６は、仲介ブラケット６２の突部６４の下側にボルト付けなどで固定されている。ケース６６内に摺動可能な状態で切換部材７１が挿入され、ケース６６に固定したエアシリンダ７２によって進退するようになっている。前記切換部材７１には、中実とされたストッパ部７３とその隣に開けた通過孔７４が設けられている。 As shown in FIG. 8, the bolt buffer unit 60 is provided in a state in which an elongate switching chamber 65 is provided in a state where an inlet hole 67 and an outlet hole 68 are opposed to each other. An inlet pipe 69 is welded to 66, and an outlet pipe 70 is press-fitted into the outlet hole 68. The case 66 is fixed to the lower side of the projection 64 of the mediation bracket 62 by bolting or the like. A switching member 71 is inserted into the case 66 in a slidable state, and is advanced and retracted by an air cylinder 72 fixed to the case 66. The switching member 71 is provided with a solid stopper portion 73 and a through hole 74 opened next thereto.
　図１や図６から明らかなように、細長いボルト緩衝ユニット６０は、エアシリンダ８２と干渉しないようにするために、エアシリンダ７２が軸線Ｙ－Ｙの外側に位置するように配置してある。 As is clear from FIG. 1 and FIG. 6, the elongated bolt buffer unit 60 is arranged so that the air cylinder 72 is located outside the axis YY so as not to interfere with the air cylinder 82.
　入口管６９にパーツフィーダ７６から延びてきている供給ホース７５が接続されている。この供給ホース７５は、柔軟性のあるウレタン樹脂のような合成樹脂製とされ、Ｘ型溶接機１が種々な方向に向きを変えても追従できるようになっている。 A supply hose 75 extending from the parts feeder 76 is connected to the inlet pipe 69. The supply hose 75 is made of a synthetic resin such as a flexible urethane resin, and can follow even if the X-type welding machine 1 changes its direction in various directions.
　前記パーツフィーダ７６にはボルト１８を一つずつ送り出すエスケープユニット７９が取り付けられ、空気噴射でボルト１８を送り出す噴射管８０が接続されている。 The parts feeder 76 is provided with an escape unit 79 that sends out the bolts 18 one by one, and an injection pipe 80 that sends out the bolts 18 by air injection.
　傾斜取付け部材について説明する。 The tilt mounting member will be described.
　ケース６６に固定された出口管７０は上方に延びていて、突部６４に開けた通過孔７７を貫通し、さらに突部６４の上に載置された傾斜取付け部材５９をも貫通している。傾斜取付け部材５９は、図８に示すように、ステンレス鋼製の分厚い板材を屈曲した「く」の字型であり、取付け部７８の傾斜角度が所定角度に設定されている。そして、傾斜取付け部材５９は、ボルト付けなどで突部６４の上面に固定してある。なお、傾斜取付け部材５９は、ボルト供給ユニット５８の取り付け角度を設定する機能を果たすものであるから、上記の「く」の字型以外の構造を採用することも可能である。 The outlet pipe 70 fixed to the case 66 extends upward, passes through a passage hole 77 opened in the protrusion 64, and further passes through an inclined attachment member 59 placed on the protrusion 64. . As shown in FIG. 8, the inclined attachment member 59 has a "<" shape that is obtained by bending a thick plate made of stainless steel, and the inclination angle of the attachment portion 78 is set to a predetermined angle. The inclined mounting member 59 is fixed to the upper surface of the projection 64 by bolting or the like. The inclined mounting member 59 has a function of setting the mounting angle of the bolt supply unit 58. Therefore, it is possible to adopt a structure other than the “<” shape.
　ボルト供給ユニットについて説明する。 The bolt supply unit will be described.
　ボルト供給ユニット５８は、進退動作をする供給ロッド５７がエアシリンダ８２によって進退するもので、ユニットの全体形状は長尺なものであり、その長手方向が軸線Ｙ－Ｙで示されている。供給ロッド５７の先端部に保持ヘッド８３が結合してある。保持ヘッド８３には、下向きに開放された円形の凹部８４が形成され、その奥の内端面にフランジ部２０が着座するようになっている。この着座に必要な吸引力は、保持ヘッド８３の内部に埋設した永久磁石８１によって確保されている。着座しているボルト１８はその軸部１９が電極軸線Ｏ－Ｏと同軸状態となるので、保持ヘッド８３では軸部１９が上下方向、すなわち鉛直方向に保持されている。 The bolt supply unit 58 is such that a supply rod 57 that moves forward and backward is advanced and retracted by an air cylinder 82, and the overall shape of the unit is long, and the longitudinal direction thereof is indicated by an axis YY. A holding head 83 is coupled to the distal end portion of the supply rod 57. The holding head 83 is formed with a circular concave portion 84 opened downward, and the flange portion 20 is seated on the inner end surface at the back. The attractive force necessary for the seating is secured by a permanent magnet 81 embedded in the holding head 83. Since the shaft portion 19 of the seated bolt 18 is coaxial with the electrode axis OO, the holding head 83 holds the shaft portion 19 in the vertical direction, that is, in the vertical direction.
　凹部８４の奥に空気通路９０が開口しており、軸部１９の先端部がわずかに受入孔２３に進入したときに、空気を噴射してボルト１８を受入孔２３の奥まで進入させるようになっている。 An air passage 90 is opened at the back of the recess 84, and when the tip of the shaft portion 19 slightly enters the receiving hole 23, air is injected so that the bolt 18 enters the back of the receiving hole 23. It has become.
　図８は、パーツフィーダ７６から空気噴射により高速で送られてきたボルト１８（同図に示してある上下２本のボルトのうち下側のもの）がストッパ部７３に当たって緩衝作用を受け、空気圧を受けて停止している状態を示している。ここで切換部材７１がエアシリンダ７２の動作で移動して、通過孔７４が入口孔６７と出口孔７０に合致すると、ボルト１８は出口管７０を通過して保持ヘッド８３の凹部８４の奥部に着座し、保持される。このようにして保持されたボルトが同図に示してある上下２本のボルトのうち上側のものである。 FIG. 8 shows that the bolt 18 (the lower one of the two upper and lower bolts shown in the figure) sent from the parts feeder 76 by air injection hits the stopper portion 73 and receives a buffering action to reduce the air pressure. It shows a state of being stopped after receiving. Here, when the switching member 71 is moved by the operation of the air cylinder 72 and the passage hole 74 is aligned with the inlet hole 67 and the outlet hole 70, the bolt 18 passes through the outlet pipe 70 and the inner part of the concave portion 84 of the holding head 83. Sit and hold. The bolt held in this way is the upper one of the two upper and lower bolts shown in the figure.
　第１傾斜角度、第２傾斜角度について説明する。 The first tilt angle and the second tilt angle will be described.
　図６に示すように、挿入エアシリンダ４４の取付け板４５を取付け面４２上で滑らしながらずらして取付け面４２上における挿入エアシリンダ４４の取付け位置を所定位置に設定する。これにより、上方から見た支持アーム６の長手方向（軸線Ｘ－Ｘ）と、ボルト供給ユニット５８の長手方向（軸線Ｙ－Ｙ）がなす第１傾斜角度θ１が求められる。取付け面４２上で挿入エアシリンダ４４の向きを前記長孔５４の移動許容範囲内で変えることにより、第１傾斜角度θ１が設定される。具体的には、電極軸線Ｏ－Ｏを中心にして挿入エアシリンダ４４を円弧状に揺動させることによって位置決めがなされる。 As shown in FIG. 6, the mounting plate 45 of the insertion air cylinder 44 is shifted while sliding on the mounting surface 42, and the mounting position of the insertion air cylinder 44 on the mounting surface 42 is set to a predetermined position. Thus, the first inclination angle θ1 formed by the longitudinal direction (axis line XX) of the support arm 6 viewed from above and the longitudinal direction (axis line YY) of the bolt supply unit 58 is obtained. The first inclination angle θ1 is set by changing the direction of the insertion air cylinder 44 on the mounting surface 42 within the allowable movement range of the long hole 54. Specifically, positioning is performed by swinging the insertion air cylinder 44 in an arc shape around the electrode axis OO.
　一方、図８に示すように、前記傾斜取付け部材５９の傾斜角度を所定角度に設定することにより、横側から見た前記支持アーム６の長手方向（軸線Ｘ－Ｘ）と、前記ボルト供給ユニット５８の長手方向（軸線Ｙ－Ｙ）がなす第２傾斜角度θ２が求められる。第２傾斜角度θ２の設定は、傾斜取付け部材５９の取付け部７８の傾斜角度を、所定角度に設定しておくことにより求められる。この取付け部７８の傾斜角度は、電極１５の高さＨ（図１）が主になって設定されるが、合わせて第１傾斜角度θ１の変化に応じて微小な角度調整が必要となる。したがって、前記高さＨの高さ毎に第２傾斜角度θ２の値を示す対照表を準備しておくことが望ましい。 On the other hand, as shown in FIG. 8, by setting the tilt angle of the tilt mounting member 59 to a predetermined angle, the longitudinal direction (axis XX) of the support arm 6 as viewed from the side, and the bolt supply unit A second inclination angle θ2 formed by the longitudinal direction (axis YY) of 58 is obtained. The setting of the second inclination angle θ2 is obtained by setting the inclination angle of the attachment portion 78 of the inclination attachment member 59 to a predetermined angle. The inclination angle of the mounting portion 78 is mainly set by the height H (FIG. 1) of the electrode 15, but a fine angle adjustment is required in accordance with the change in the first inclination angle θ1. Therefore, it is desirable to prepare a comparison table showing the value of the second inclination angle θ2 for each height H.
　供給ロッド５７が伸長したときに、保持ヘッド８３に保持されたボルト１８と電極１５の受入孔２３が同軸状態となるように、第１傾斜角度θ１と第２傾斜角度θ２が設定される。この両角度θ１とθ２が設定されることにより、図９Ａおよび９Ｂに示すように、保持ヘッド８３に保持された軸部１９は支持アーム６の軸線Ｘ－Ｘの真上に位置している。すなわち、軸部１９の軸線が軸線Ｘ－Ｘに直交した状態になっている。 When the supply rod 57 extends, the first inclination angle θ1 and the second inclination angle θ2 are set so that the bolt 18 held by the holding head 83 and the receiving hole 23 of the electrode 15 are in a coaxial state. By setting both the angles θ1 and θ2, the shaft portion 19 held by the holding head 83 is positioned immediately above the axis XX of the support arm 6 as shown in FIGS. 9A and 9B. That is, the axis of the shaft portion 19 is in a state orthogonal to the axis XX.
　したがって、ボルト供給装置１００を組み立てる際に、電極１５の高さ寸法Ｈに適応させて第１傾斜角度θ１と第２傾斜角度θ２を設定することにより、支持アーム６へボルト供給装置１００を取り付ける前の段階としての角度θ１とθ２の設定が完了する。このような支持アーム６への取り付け前の両角度設定は、ボルト供給装置１００を支持アーム６に取り付ける前であるから、支持アーム６の軸線Ｘ－Ｘを仮想的に存在させて遂行される。つまり、横側面３２から軸線Ｘ－Ｘまでの距離や、出口管７０の高さや電極１５の高さＨなどに応じて第２傾斜角度θ２が定められる。その後、支持アーム６への縦基部材２８の取り付けを、結合突部３３や補助部材３４の挟み付け部分によって行い、この挟み付け部分でのずらし調整で図１に示すような軸部１９と受入孔２３との同軸性が成立する。 Therefore, when the bolt supply device 100 is assembled, the first inclination angle θ1 and the second inclination angle θ2 are set according to the height dimension H of the electrode 15, so that the bolt supply device 100 is attached to the support arm 6. This completes the setting of the angles θ1 and θ2. Such setting of both angles before the attachment to the support arm 6 is performed before the bolt supply device 100 is attached to the support arm 6, so that the axis XX of the support arm 6 virtually exists. That is, the second inclination angle θ2 is determined according to the distance from the lateral surface 32 to the axis XX, the height of the outlet pipe 70, the height H of the electrode 15, and the like. Thereafter, the vertical base member 28 is attached to the support arm 6 by the sandwiching portion of the coupling protrusion 33 and the auxiliary member 34, and the shaft portion 19 and the receiving portion 19 shown in FIG. Coaxiality with the hole 23 is established.
　このような第１傾斜角度θ１や第２傾斜角度θ２が設定されても、ボルト供給装置１００全体と支持アーム６との相対位置が狂っていると、図９Ｃに示すように、軸部１９と電極軸線Ｏ－Ｏが離れたり、軸部１９が電極軸線Ｏ－Ｏに対して傾いたりすることとなる。このような狂いを補正するために、前記結合ボルト３５を少し緩めるとともに、上下調整ボルト３９、４０を緩めて、縦基部材２８を支持アーム６の長手方向（軸線Ｘ－Ｘ）に沿ってずらし、さらに上下調整ボルト３９、４０を突出させたり、後退させたりして縦基部材２８の軸線Ｘ－Ｘに対する傾きを補正する。このような一連の調整が完了すると、各ボルトを強固に締め付ける。 Even if the first inclination angle θ1 and the second inclination angle θ2 are set, if the relative position between the entire bolt supply device 100 and the support arm 6 is out of order, as shown in FIG. The electrode axis OO is separated, or the shaft portion 19 is inclined with respect to the electrode axis OO. In order to correct such a deviation, the coupling bolt 35 is slightly loosened and the vertical adjustment bolts 39 and 40 are loosened, and the vertical base member 28 is shifted along the longitudinal direction (axis line XX) of the support arm 6. Further, the inclination of the vertical base member 28 with respect to the axis XX is corrected by causing the vertical adjustment bolts 39 and 40 to protrude or retreat. When such a series of adjustments is completed, each bolt is tightened firmly.
　前述のように、縦基部材２８が密着する横側面３２が、電極軸線Ｏ－Ｏと支持アーム６の軸線Ｘ－Ｘを含む仮想平面と平行になっているので、この仮想平面に添った状態で縦基部材２８を結合ボルト３５や上下調整ボルト３９、４０による位置調整をして、ボルト供給装置１００全体の上下方向（電極軸線Ｏ－Ｏ方向）、左右方向（軸線Ｘ－Ｘ方向）、傾き方向（Ｘ－Ｘに対する揺動方向）にわたる位置決めが正確になされる。 As described above, since the lateral side surface 32 to which the vertical base member 28 is in close contact is parallel to a virtual plane including the electrode axis OO and the axis XX of the support arm 6, the horizontal plane 32 is attached to the virtual plane. The vertical base member 28 is adjusted by the connecting bolt 35 and the vertical adjustment bolts 39 and 40, so that the entire bolt supply device 100 is moved in the vertical direction (electrode axis OO direction), left and right direction (axis XX direction), Positioning over the tilt direction (swing direction with respect to XX) is performed accurately.
　上述のように、ボルト供給装置１００を単独の状態で第１傾斜角度θ１および第２傾斜角度θ２が求められてから、必要であれば図９Ｃに示したような狂いを補正する。このような狂いが発生することなくボルト供給装置１００の取り付けがなされた場合には、簡素化された取り付け作業となる。このような簡素な取り付け作業となるので、請求の範囲では「少なくとも前記第１傾斜角度と第２傾斜角度を設定することにより、」のように「少なくとも」なる表現がなされている。 As described above, after the first inclination angle θ1 and the second inclination angle θ2 are obtained with the bolt supply device 100 alone, the deviation as shown in FIG. 9C is corrected if necessary. When the bolt supply device 100 is mounted without such a deviation, the mounting operation is simplified. Since it is such a simple mounting operation, the expression “at least” is made as “at least by setting the first inclination angle and the second inclination angle” in the claims.
　なお、上記各種のエアシリンダに換えて、進退出力をする電動モータを採用することもできる。また、上記各種の永久磁石を電磁石に置き換えることも可能である。 It should be noted that, instead of the various air cylinders described above, an electric motor that outputs and retreats can be employed. It is also possible to replace the various permanent magnets with electromagnets.
　上述の動作は、一般的に採用されている制御手法で容易に行わせることが可能である。制御装置またはシーケンス回路からの信号で動作する空気切換弁や、エアシリンダの所定位置で信号を発して前記制御装置に送信するセンサー等を組み合わせることによって、所定の動作を確保することができる。 The above operation can be easily performed by a generally adopted control method. A predetermined operation can be ensured by combining an air switching valve that operates with a signal from the control device or the sequence circuit, a sensor that emits a signal at a predetermined position of the air cylinder, and transmits the signal to the control device.
　以上に説明した実施例１の作用効果は、つぎのとおりである。 The operational effects of the first embodiment described above are as follows.
　上述のように、前記支持アーム６に下方へ延びた形状の縦基部材２８が結合され、前記縦基部材２８の下部にほぼ水平方向の取付け面４２を有する横基部材４３が結合され、前記取付け面４２に前記電極軸線Ｏ－Ｏと同方向に進退出力をする挿入駆動手段である挿入エアシリンダ４４が取り付けられ、前記挿入エアシリンダ４４に該挿入エアシリンダ４４によって上下方向に進退する支持部材５６が上方に延びた状態で結合され、前記支持部材５６に進退動作式の供給ロッド５７を備えたボルト供給ユニット５８が傾斜取付け部材５９を介して傾斜した姿勢で取り付けられ、前記供給ロッド５７の先端にボルト１８を上下方向の姿勢で保持する保持ヘッド８３が取り付けられたものである。 As described above, the vertical base member 28 having a shape extending downward is coupled to the support arm 6, and the horizontal base member 43 having a substantially horizontal mounting surface 42 is coupled to the lower portion of the vertical base member 28. An insertion air cylinder 44, which is an insertion drive means for performing forward / backward output in the same direction as the electrode axis OO, is attached to the attachment surface 42, and a support member that is advanced and retracted in the vertical direction by the insertion air cylinder 44. 56 is coupled in a state of extending upward, and a bolt supply unit 58 having an advancing / retracting supply rod 57 is attached to the support member 56 in an inclined posture via an inclined attachment member 59, A holding head 83 that holds the bolt 18 in a vertical posture is attached to the tip.
　つまり、前記取付け面４２が、縦基部材２８の下方への伸長によって支持アーム６よりも低い箇所に位置付けられ、そこに前記挿入エアシリンダ４４が取り付けられ、この挿入エアシリンダ４４から上方に延びた状態で支持部材５６が配置され、この支持部材５６に傾斜取付け部材５９を介してボルト供給ユニット５８が傾斜した姿勢で取り付けられる。このような構成により、前記取付け面４２上において挿入エアシリンダ４４の取付け位置を微調整することができる。また、前記傾斜取付け部材５９の傾斜角度を所定角度に自由に設定することができる。 That is, the mounting surface 42 is positioned at a position lower than the support arm 6 by the downward extension of the vertical base member 28, and the insertion air cylinder 44 is attached thereto, and extends upward from the insertion air cylinder 44. The support member 56 is arranged in a state, and the bolt supply unit 58 is attached to the support member 56 via the inclined attachment member 59 in an inclined posture. With this configuration, the mounting position of the insertion air cylinder 44 on the mounting surface 42 can be finely adjusted. Further, the inclination angle of the inclination attaching member 59 can be freely set to a predetermined angle.
　したがって、前記取付け面４２上における前記挿入エアシリンダ４４の取付け位置を所定位置に設定することにより、上方から見た前記支持アーム６の長手方向（軸線Ｘ－Ｘ）と前記ボルト供給ユニット５８の長手方向（軸線Ｙ－Ｙ）がなす角度を第１傾斜角度θ１として正確に求めることができる。同時に、前記傾斜取付け部材５９の傾斜角度を所定角度に設定することにより、横側から見た前記支持アーム６の長手方向（軸線Ｘ－Ｘ）と前記ボルト供給ユニット５８の長手方向（軸線Ｙ－Ｙ）がなす角度を第２傾斜角度θ２として正確に求めることができる。このように、少なくとも前記第１傾斜角度θ１と第２傾斜角度θ２を設定することにより、前記供給ロッド５７が進出したときに、ボルト１８と前記受入孔２３が同軸状態になる。 Therefore, by setting the mounting position of the insertion air cylinder 44 on the mounting surface 42 to a predetermined position, the longitudinal direction (axis XX) of the support arm 6 and the longitudinal direction of the bolt supply unit 58 as viewed from above. The angle formed by the direction (axis YY) can be accurately obtained as the first inclination angle θ1. At the same time, by setting the inclination angle of the inclination attachment member 59 to a predetermined angle, the longitudinal direction of the support arm 6 (axis XX) and the longitudinal direction of the bolt supply unit 58 (axis Y- The angle formed by Y) can be accurately obtained as the second inclination angle θ2. Thus, by setting at least the first inclination angle θ1 and the second inclination angle θ2, the bolt 18 and the receiving hole 23 are in a coaxial state when the supply rod 57 is advanced.
　とくに、ボルト供給装置１００を溶接機の支持アーム６に取り付ける前に、同供給装置１００を組み立てる段階で、支持アーム６から起立した電極１５の高さに適合させて前記第１傾斜角度θ１と第２傾斜角度θ２が確定できる。したがって、両角度θ１、θ２がセットされたボルト供給装置１００を準備し、同装置の縦基部材２８を溶接機１の支持アーム６に取り付けるだけでよいから、支持アーム６に対するボルト供給ユニット５８の２方向の傾斜設定の作業が簡素化される。 In particular, before the bolt supply device 100 is attached to the support arm 6 of the welding machine, the first tilt angle θ1 and the first tilt angle θ1 are adjusted to the height of the electrode 15 raised from the support arm 6 at the stage of assembling the supply device 100. Two inclination angles θ2 can be determined. Therefore, it is only necessary to prepare the bolt supply device 100 in which both angles θ1 and θ2 are set, and to attach the vertical base member 28 of the device to the support arm 6 of the welding machine 1, so that the bolt supply unit 58 for the support arm 6 The work of setting the inclination in two directions is simplified.
　前記結合箇所２９の両横にほぼ鉛直方向に起立している平坦な横側面３１、３２が形成されている。この横側面３１、３２は、直交している電極軸線Ｏ－Ｏと支持アーム６の軸線Ｘ－Ｘを含む仮想平面に対して、平行な位置関係とされている。したがって、横側面３２に密着している縦基部材２８を横側面３２上でスライドさせて位置調整を行うことができる。とくに、上記のような仮想平面と横側面３２との相対位置関係とされているので、軸部１９の軸線が支持アーム６の軸線Ｘ－Ｘと上方から交差した状態を維持したまま、縦基部材２８を横側面３２にスライドさせて位置調整ができる。このような調整によって、軸部１９と受入孔２３の同軸性が縦基部材２８のスライド調整だけで確保できるので、調整作業が簡素化されるとともに精度の高い位置決めができる。 The flat lateral side surfaces 31 and 32 are formed on both sides of the connecting portion 29 so as to stand substantially vertically. The lateral side surfaces 31 and 32 are in a positional relationship parallel to a virtual plane including the orthogonal electrode axis OO and the axis XX of the support arm 6. Therefore, the vertical base member 28 that is in close contact with the lateral side surface 32 can be slid on the lateral side surface 32 to adjust the position. In particular, since the relative position relationship between the virtual plane and the lateral surface 32 is as described above, the vertical base is maintained while maintaining the state where the axis of the shaft portion 19 intersects the axis XX of the support arm 6 from above. The position can be adjusted by sliding the member 28 to the lateral side surface 32. By such adjustment, since the coaxiality of the shaft portion 19 and the receiving hole 23 can be ensured only by the slide adjustment of the vertical base member 28, the adjustment work is simplified and highly accurate positioning can be performed.
　縦基部材２８と補助部材３４で既成の支持アーム６を挟み付けてボルト供給装置１００が装着されるものであるから、既存溶接機の支持アーム６の断面積を減少させるような追加加工が一切不要であり、支持アーム６の剛性を低下させるようなことがない。また、縦基部材２８の脱着でボルト供給装置１００全体の脱着が簡単に行えるから、ボルト供給装置１００を装着したり外したりすることが行いやすく、既存の溶接機の多様化が図れる。 Since the existing support arm 6 is sandwiched between the vertical base member 28 and the auxiliary member 34 and the bolt supply device 100 is mounted, no additional processing is required to reduce the cross-sectional area of the support arm 6 of the existing welding machine. This is unnecessary and does not reduce the rigidity of the support arm 6. In addition, since the entire bolt supply device 100 can be easily attached / detached by attaching / detaching the vertical base member 28, the bolt supply device 100 can be easily attached and removed, and the existing welding machines can be diversified.
　結合突部３３と補助部材３４で結合箇所２９を挟み付けている箇所と、挿入エアシリンダ４４や支持部材５６およびボルト供給ユニット５８などが集約されている高質量の箇所は、支持アーム６の長手方向で見て離隔している。このような離隔があるために、万一、結合ボルト３５がわずかに緩んだりすると、縦基部材２８全体が図１や図８などにおいて、時計方向に揺動して傾く虞がある。しかし、二つ目のブラケット３８が図４Ａや図５Ａに示すように、ブラケット３７から離隔した挿入エアシリンダ４４に近い箇所に配置してあり、そこにねじ込んだ上下調整ボルト４０が支持アーム６の上面に突き当たっているので、上述のような時計方向の傾き力が作用しても、縦基部材２８の傾きを防止することができる。したがって、ボルト１８と受入孔２３との同軸性が正確に維持できる。 A portion where the coupling portion 29 is sandwiched between the coupling protrusion 33 and the auxiliary member 34 and a high mass portion where the insertion air cylinder 44, the support member 56, the bolt supply unit 58, and the like are gathered are the length of the support arm 6. Seen away in direction. Because of such a separation, if the coupling bolt 35 is slightly loosened, the entire vertical base member 28 may be swung clockwise and tilted in FIGS. 1 and 8. However, as shown in FIG. 4A and FIG. 5A, the second bracket 38 is disposed at a location close to the insertion air cylinder 44 that is separated from the bracket 37, and the vertical adjustment bolt 40 screwed there is provided on the support arm 6. Since it is in contact with the upper surface, the vertical base member 28 can be prevented from tilting even when the clockwise tilting force as described above is applied. Therefore, the coaxiality between the bolt 18 and the receiving hole 23 can be accurately maintained.
　上述の実施例においては、縦基部材と、この縦基部材の下部に結合された横基部材と、この横基部材に固定された挿入駆動手段と、この挿入駆動手段に取り付けられた支持部材と、支持部材に取り付けられたボルト供給ユニットなどが一体化されてボルト供給装置が形成され、このボルト供給装置が支持アームに結合されているものである。ところで、支持アームの横側面は、直交関係にある電極軸線と支持アームの軸線を含む仮想平面と平行な位置関係とされている。こうすることによって、横側面に縦基部材を摺動させながら位置調整が可能となる。 In the above-described embodiment, the vertical base member, the horizontal base member coupled to the lower portion of the vertical base member, the insertion drive means fixed to the horizontal base member, and the support member attached to the insertion drive means The bolt supply unit attached to the support member is integrated to form a bolt supply device, and this bolt supply device is coupled to the support arm. By the way, the lateral side surface of the support arm is in a positional relationship parallel to an imaginary plane including the electrode axis and the axis of the support arm that are orthogonal to each other. By doing so, it is possible to adjust the position while sliding the vertical base member on the lateral side surface.
　ここで、縦基部材はボルト供給装置の取付け用部材という機能を果たすものであるから、「ボルト供給ユニットを含むプロジェクションボルト供給装置の取付け用部材が、支持アームに形成した上述のような横側面に摺動可能な状態で密着させてある」という観点から、請求の範囲には記載していないが、発明として存在させることが可能である。この点は前述のとおり、このような発明の代表的な作用効果は、ボルトの軸線が支持アームの軸線に交差しており、支持アームの横側面に沿って取付け用部材を、支持アームの長手方向、上下方向、支持アームの軸線に対する傾斜方向などに自由に位置調整ができるというものである。 Here, since the vertical base member functions as a mounting member for the bolt supply device, “the lateral surface as described above is formed on the support arm by the mounting member for the projection bolt supply device including the bolt supply unit. Although it is not described in the scope of claims from the standpoint of “adhering in a slidable state”, it can exist as an invention. In this respect, as described above, the typical effect of such an invention is that the axis of the bolt intersects the axis of the support arm, and the mounting member is moved along the side surface of the support arm. The position can be freely adjusted in the direction, the vertical direction, the inclination direction with respect to the axis of the support arm, and the like.
　上述のように、本発明の装置によれば、ボルト供給ユニットの前記２方向の取付け角度が、プロジェクションボルト供給装置の組立段階で設定できる。したがって、自動車の車体溶接工程や、家庭電化製品の板金溶接工程などの広い産業分野で利用できる。 As described above, according to the apparatus of the present invention, the mounting angles in the two directions of the bolt supply unit can be set at the assembly stage of the projection bolt supply apparatus. Therefore, it can be used in a wide range of industrial fields such as automobile body welding processes and home appliance sheet metal welding processes.

Claims (1)

  1.   一対の電極によってプロジェクションボルトを鋼板部品に電気抵抗溶接をする溶接機に適用するものであって、
    　ほぼ水平方向に延びている溶接機の支持アームに該支持アームからほぼ直角方向に上方へ起立した状態で電極が結合され、
    　前記電極にプロジェクションボルトが挿入される受入孔が電極軸線と同軸の状態で設けられ、
    　前記支持アームに下方へ延びた形状の縦基部材が結合され、
    　前記縦基部材の下部にほぼ水平方向の取付け面を有する横基部材が結合され、
    　前記取付け面に前記電極軸線と同方向に進退出力をする挿入駆動機構が取り付けられ、
    　前記挿入駆動機構に該挿入駆動機構によって上下方向に進退する支持部材が上方に延びた状態で結合され、
    　前記支持部材に進退動作式の供給ロッドを備えたボルト供給ユニットが傾斜取付け部材を介して傾斜した姿勢で取り付けられ、
    　前記供給ロッドの先端にプロジェクションボルトを上下方向の姿勢で保持する保持ヘッドが取り付けられ、
    　前記取付け面上における前記挿入駆動機構の取付け位置を所定位置に設定することにより、上方から見た前記支持アームの長手方向と前記ボルト供給ユニットの長手方向がなす角度を第１傾斜角度とすることができるように構成し、
    　前記傾斜取付け部材の傾斜角度を所定角度に設定することにより、横側から見た前記支持アームの長手方向と前記ボルト供給ユニットの長手方向がなす角度を第２傾斜角度とすることができるように構成し、
    　少なくとも前記第１傾斜角度と第２傾斜角度を設定することにより、前記供給ロッドが進出したときに前記保持ヘッドに保持されたプロジェクションボルトと前記受入孔が同軸状態になる、プロジェクションボルト供給装置。     Applying a projection bolt to a steel plate part by means of a pair of electrodes to a welding machine for electrical resistance welding,
    An electrode is coupled to a support arm of a welding machine extending in a substantially horizontal direction while standing upward in a substantially right angle direction from the support arm,
    A receiving hole into which the projection bolt is inserted into the electrode is provided in a state coaxial with the electrode axis,
    A vertical base member extending downward is coupled to the support arm,
    A horizontal base member having a substantially horizontal mounting surface is coupled to a lower portion of the vertical base member,
    An insertion drive mechanism for advancing and retracting output in the same direction as the electrode axis is attached to the attachment surface,
    A support member that advances and retreats in the vertical direction by the insertion drive mechanism is coupled to the insertion drive mechanism in a state of extending upward,
    A bolt supply unit having an advancing / retracting-type supply rod is attached to the support member in an inclined posture via an inclined attachment member,
    A holding head that holds the projection bolt in a vertical posture is attached to the tip of the supply rod,
    By setting the mounting position of the insertion drive mechanism on the mounting surface to a predetermined position, the angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit viewed from above is set as the first inclination angle. Configured to be able to
    By setting the tilt angle of the tilt mounting member to a predetermined angle, the angle formed by the longitudinal direction of the support arm and the longitudinal direction of the bolt supply unit viewed from the side can be set as the second tilt angle. Configure
    A projection bolt supply device in which the projection bolt held by the holding head and the receiving hole are coaxial with each other by setting at least the first inclination angle and the second inclination angle.
PCT/JP2012/074462 2012-09-25 2012-09-25 Projection bolt feed device WO2014049674A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007083302A (en) * 2005-09-24 2007-04-05 Yoshitaka Aoyama Parts welding device for projection bolt or the like
JP2012218069A (en) * 2011-04-05 2012-11-12 Yoshitaka Aoyama Projection bolt feeder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007083302A (en) * 2005-09-24 2007-04-05 Yoshitaka Aoyama Parts welding device for projection bolt or the like
JP2012218069A (en) * 2011-04-05 2012-11-12 Yoshitaka Aoyama Projection bolt feeder

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