JP5057033B2 - Parts supply device for electric resistance welding machine - Google Patents

Description

  The present invention relates to a component supply device used in an electric resistance welder.

It is known that a part is held on a supply rod which is a part supply member and supplied to a target location such as a guide pin or a receiving hole of an electric resistance welding electrode.
Japanese Patent No. 2832528 Japanese Patent No. 3306579

  In the case described above, only one component such as a projection nut or a projection bolt is supplied. Therefore, when a plurality of parts are welded to one steel plate part, there is a problem that the required time becomes long and productivity cannot be improved. Further, when supplying a plurality of parts, a structure of a supply device adapted to the shape of the counterpart steel plate part and the welding location is required. In particular, when supplying a plurality of parts, it is important that the parts are supplied accurately to the target location.

  Furthermore, even when a press device that applies plastic working to a long material plate and a welding device are continuously combined to operate both devices as a system, a plurality of parts must be welded to the press component. Is required. Even in this case, the above-mentioned requirements must be satisfied.

  The present invention has been provided to solve the above-described problems, and an object thereof is to provide a component supply apparatus for an electric resistance welder that can accurately and efficiently supply a plurality of components.

Means to solve the problem

According to the first aspect of the present invention, a component is supplied to a guide pin or a receiving hole of an electric resistance welding electrode, which is a target location, and welded to a steel plate component. An advancing / retracting supply unit is configured by being attached to a driving means, and a plurality of the advancing / retracting supply units are attached to a base member having a shape adapted to the step shape of the steel plate part, and each of the advancing / retracting supply units has a step shape of the steel plate part. configured to allow the component supply at a location adapted to, configured to move the held components and parts in a state in which the axis becomes coaxial with the axis of the electric resistance welding electrode in the axial direction of the electrode of the component supplying member to together, lifting means attached to the stationary member is attached to the base member, forward and backward direction of arrangement so as to be orthogonal to the elevating means and moving direction of the reciprocating type supply unit and It is an electric resistance welding machine component supply device according to claim is.

Effect of the invention

  The plurality of parts held in each holding part exactly match the welding location of the steel plate part when the advance / retreat type supply unit advances and the part supply member stops at a predetermined position. In this state, the elevating means operates to supply the component to the guide pin or the receiving hole, pressurize the component and the steel plate component between the electrodes, energize the welding current, and complete the welding.

  Therefore, since a plurality of parts are supplied to a plurality of predetermined target locations at one time or continuously, the parts are efficiently supplied to the electric resistance welding machine, and the welding process time is shortened. This is effective for improving productivity. Furthermore, since the component holding position of the component supply member can be easily made to correspond to the welding location of the steel plate component, the component is accurately supplied to the target location, and the operation accuracy as the component supply device is improved.

  When the elevating means operates, the component held by the component supply member also moves in the electrode axis direction. The electrode is usually provided with a guide pin that is coaxial with the electrode axis, or a receiving hole that is coaxial with the electrode axis. Therefore, in the case of a part shaped like a projection nut, the nut is held with the guide pin passing through the screw hole of the nut by the movement of the part, and in the case of a part shaped like a projection bolt. The shaft of the bolt is inserted into the receiving hole by the movement of the component, and the bolt is held. In this way, parts such as nuts and bolts are accurately and efficiently supplied to the guide pins or receiving holes of the electrodes by the operation of the lifting means.

  Then, by selecting the number of attachments and attachment postures of the advancing / retracting supply unit with respect to the base member, it becomes possible to accurately supply the parts suitable for the shape of the counterpart steel plate part and the welding location of the part. .

Before Symbol the reciprocating type supply unit configured to supply operating independently.

  As described above, since each of the advancing / retracting supply units performs a supply operation independently, it is possible to supply parts simultaneously to a plurality of locations of the steel sheet parts at a time to increase productivity. it can. Alternatively, each advancing and retracting supply unit can be operated sequentially to supply components to a plurality of locations in a predetermined order, and the components can be supplied in an order that is convenient for improving the shape of the steel sheet components and supply efficiency. For example, by starting the parts supply member having a long advance distance first and starting the parts supply member having a short advance distance later, a plurality of parts can be supplied almost simultaneously. Alternatively, depending on the bent shape or curved shape of the steel plate component, the component is supplied in advance to one location, and then the component is supplied to another location. By doing so, even if it is a steel plate part having a shape that is difficult to supply, smooth component supply is realized by stepwise supply such as the first supply and the second supply.

Before Kimoto member, said Ru shape der capable component supply at a place adapted to the shape of the curved or bent like of the reciprocating type supply unit steel sheet part.

  Since the shape of the base member itself is adapted to the shape of the steel plate part, it is easy to adapt each advancing and retracting supply unit attached to the base member to the shape of the steel plate part. For example, if it is a steel plate part with a level | step difference, the said advantage is securable by making a base member into a level | step difference shape.

It is that provided suction means for holding the parts before Symbol holder.

  In this way, since the component is firmly adsorbed to the holding portion, even if vibration or some external force acts on the component when the component supply member advances, the component may be easily detached from the holding portion. Therefore, a highly reliable component supply operation can be obtained.

Supply passage means for supplying a component that is attached to the stationary member before Symbol holder.

  Since the supply passage means connected to each holding portion is attached to the stationary member, parts of a predetermined type and size are appropriately supplied to each holding portion, and the supply accuracy of the parts is always maintained.

Supply passage means for supplying a component before Symbol holder is installed in a component supplying member.

  Since the supply passage means moves forward and backward together with the component supply member, the next part can be guided from the supply passage means to the holding portion immediately after the part is supplied to the target location. Therefore, the next part can be introduced by using the time during which the part supply member is retracted, and the time can be reduced by synchronizing the introduction of the part into the holding part and the retreat of the part supply member. it can.

Before SL components, Ru projection nut der supplied to the guide pins of the electric resistance welding electrodes.

  The guide pin relatively enters the screw hole of the projection nut. Therefore, the support state of the component at the target location is stabilized.

Before SL components, Ru projection bolt der supplied to the receiving hole of the electric resistance welding electrodes.

  The projection bolt enters the receiving hole. Therefore, the support state of the component at the target location is stabilized.

  Next, the best mode for carrying out the component supply device for an electric resistance welder of the present invention will be described.

  The component handled in the first embodiment is an iron projection nut 1 as shown in FIG. Hereinafter, it may be simply described as a nut. The nut 1 includes a square main body 2, a screw hole 3 provided at the center of the main body, and a welding protrusion 4 provided at one of the four corners of the main body 2.

  1 to 4 show a first embodiment.

  In the electric resistance welding machine, a commonly used fixed electrode and movable electrode are paired, or two movable electrodes are paired. In the first embodiment, as shown in FIGS. 3 and 4, only the fixed electrode 5 is shown, and the movable electrode arranged coaxially with the axis OO is not shown. A guide pin 6 is provided coaxially with the fixed electrode 5, and the guide pin 6 protrudes through the steel plate part 7 placed on the fixed electrode 5.

  The screw hole 3 of the nut 1 that has been supplied is fitted into the guide pin 6. Therefore, this guide pin 6 becomes the target location of nut supply.

  The overall configuration of the component supply apparatus will be described.

  The base member 8 is formed by bending a thick plate material, and has an upper step portion 8A and a lower step portion 8B as shown in FIG. A guide tube 9 is fixed on each of the upper step portion 8A and the lower step portion 8B, and a component supply member 10 that is slidable in the guide tube 9 is provided. This component supply member 10 is made of a rod-shaped member having a long rectangular cross section, and is attached to an advance / retreat driving means in order to perform an advance / retreat operation. This advance / retreat driving means can be realized by various methods such as an advance / retreat output type electric motor or an air cylinder. Here, an air cylinder 11 is employed. The air cylinder 11 is fixed to each of the upper step portion 8 </ b> A and the lower step portion 8 </ b> B, and each piston rod 16 is coupled to the component supply member 10. The advancing / retreating direction of the component supply member 10 is substantially horizontal.

  The above-described component supply member 10 holds the nut 1 and supplies it to the guide pin 6. The component supply member 10 is a rod having a supply function. Therefore, in the following description, the component supply member 10 is mainly expressed as “supply rod 10”.

  The advance / retreat type supply unit will be described.

  The aforementioned component supply member 10, that is, the supply rod 10 and the air cylinder 11 as the advance / retreat driving means are integrated to form the advance / retreat type supply units 48, 49. It is fixed to 8A and the lower step 8B. Here, as shown in FIG. 1, the advancing / retracting supply unit is attached to two base members 8 in a parallel state. However, the number of these can be increased to three or more to change the shape of the base member 8. It is also possible to arrange them in a crossed state instead of in parallel. As a modified example of the base member 8, there is one in which an advance / retreat type supply unit is additionally attached to the lower surfaces of the upper step portion 8A and the lower step portion 8B in FIG.

  As will be described later, the supply rod 10 is fixed in a state where the axis of the nut 1 (the axis of the screw hole 3) on which the supply rod 10 is advanced and held is coaxial with the axis OO of the fixed electrode 5. The electrode 5 is moved in the direction of the axis OO. In order to perform such movement, lifting means is attached to the stationary member 12, and the base member 8 is coupled to the upper part thereof. The raising / lowering means can be realized by various methods such as an advancing / retracting output type electric motor or an air cylinder. Here, an air cylinder 13 is employed. The air cylinder 13 is arranged so that the piston rod 14 of the air cylinder 13 advances and retreats in the same direction as the axis OO, and the upper end of the piston rod 14 is coupled to the lower side of the base member 8. The advancing / retreating output direction of the air cylinder 13 and the advancing / retreating direction of the supply rod 10 are orthogonal to each other.

  The advancing and retracting supply units 48 and 49 can be advanced and retracted simultaneously, or the other can advance continuously immediately after one of them has advanced. Therefore, air switching valves (not shown) for the air cylinders 11 of both units 48 and 49 are controlled so that they can be operated separately. Such sequence control is performed using a normal sensor or control device.

  With the above-described configuration, the supply rod 10 advances to a predetermined position by the output of the air cylinder 11, and then the supply rod 10 descends in a right angle direction by the output of the air cylinder 13. It returns to the position, and then the supply rod 10 returns to the raised position by the output of the air cylinder 13. That is, the square motion is performed, and the movement locus is indicated by reference numeral 15 in FIG. 1 and FIG. Such a square motion is performed in accordance with the case where the bi-retreat type supply units 48 and 49 are operated simultaneously or continuously as described above.

  The holding unit will be described.

  The projection nut 1 is held by a holding portion 18 formed on the lower surface of each supply rod 10. The holding portion 18 functions to hold the nut 1 fed from the supply passage means and reach the target location. For example, a pin protruding from the lower surface of the supply rod 10 is a screw hole of the nut 1. The structure may be such that the permanent magnet embedded in the supply rod 10 is prevented from falling. Or the structure which accommodates the nut 1 in the recessed part formed in the lower surface of the supply rod 10 may be sufficient. Here, the latter example is adopted.

  Here, one nut 1 is held by each supply rod 10, and the nuts 1 held by both supply rods 10 are displaced in the front-rear direction when viewed in the advancing direction of the supply rod 10. It has become. That is, as shown in FIG. 3 (A), the two nuts 1 are welded to the steel plate part 7 at a position that is obliquely displaced, and accordingly, the fixed electrode 5 on which the steel plate part 7 is placed. Is arranged at a position shifted diagonally. That is, a difference in length is given to both supply rods 10. FIG. 3A shows the positional relationship between the supply rod 10 in the advanced state and the position where the nut 1 is welded, that is, the position of the fixed electrode 5.

  Therefore, the arrangement | positioning location of the holding | maintenance part 18 in the supply rod 10 is made to respond | correspond to the several welding location of the steel plate component 7 in the state which the supply rod 10 advanced to the predetermined position and stopped. Note that the number of the holding portions 18 may be increased so that two nuts 1 or more can be held on one supply rod 10.

  The recessed type holding portion 18 will be described. As shown in FIGS. 1A and 3B, the end portion 19 of the supply rod 10 that protrudes longer and the end of the supply rod 10 that is shorter than the end portion 19 are provided. Each holding portion 18 is formed in each portion 19. Due to the arrangement of the holding portions 18 as described above, the two holding portions 18 are obliquely displaced as described above. Since both holding portions 18 have the same structure, only one side will be described.

  2B is a cross-sectional view taken along the line BB in FIG. 2A, and this cross-sectional portion is illustrated on the lower side of FIG. Moreover, it is shown in the right side of the same figure (B) which is a B arrow view of FIG. 1 (A). A recess 21 is provided on the lower surface of the end 19 of the supply rod 10. The concave portion 21 has a square shape that can accommodate the main body portion 2 of the nut 1, and as shown in FIGS. 1 and 2, is an open portion 22 in which the distal end side of the supply rod 10 is opened. 1 is relatively extracted. A permanent magnet 23 serving as a suction means is embedded in the inner surface of the recess 21 opposite to the opening 22.

  This permanent magnet 23 is a suction means for attracting the nut 1 to the holding portion 18. As a method other than the magnet, for example, the permanent magnet 23 can be attracted and held by air suction.

  The supply passage means will be described.

  The above-described supply passage means is indicated by reference numeral 24 and serves to make the nut 1 reach the holding portion 18, and is constituted by a tube member 25 having a rectangular cross section that matches the nut shape. The pipe members 25 extend from the parts feeders 26 and 27, respectively, and are attached to the stationary member 12. The stationary member 12 means a member such as a base portion of the supply device, a machine frame, or a bracket extending therefrom.

  As shown in FIG. 2B, a plate-like stopper member 28 is formed at the end of the tube member 25, and the position of the tube member 25 is such that the nut 1 received here is positioned directly below the recess 21. Is set. An opening 33 is provided immediately above the stop position of the nut 1. When the nut 1 is received by the stopper member 28, the nut 1 is subsequently attracted toward the concave portion 21 by the attractive force of the permanent magnet 23 and is accommodated in the concave portion 21 through the opening 33.

  As shown in FIG. 2C, a lift device 29 can be employed to assist the attractive force of the permanent magnet 23 or to replace it with the permanent magnet 23. That is, the air cylinder 30 is fixed to the lower side of the pipe member 25, and the lift member 32 is disposed on the piston rod 31 so as to enter the pipe member 25. The nut 1 is lifted by the lift member 32 and reaches the recess 21 through the opening 33.

  Although the above-described tube member 25 is fixed to the stationary member 12, as shown in FIG. 2D, the tube member 25 that is a supply passage means may be attached to the supply rod 10. Here, a short joint pipe 35 having a rectangular cross section is welded to the lateral surface of the supply rod 10 and communicated with the recess 21, and a flexible urethane resin supply hose 36 joined to the joint pipe 35 is a parts feeder. 26, 27. In this case, since the nut 1 enters from the side of the recess 21, the permanent magnet 23 is arranged on the back side of the joint pipe 35.

  The adaptive arrangement of the component supply member with respect to the steel plate component will be described.

  The supply rod 10 is arranged so as to adapt to the shape of the steel plate part 7 such as bending or bending. As shown in FIG. 4A, the steel plate part 7 has a step shape such as an upper step portion 37 and a lower step portion 38 by bending. Therefore, both supply rods 10 are provided with a vertical shift dimension L corresponding to the step size of the steel plate part 7. This deviation dimension L is also illustrated in FIG. 1B, and therefore, an upper step 8A and a lower step 8B are formed on the base member 8. The left and right fixed electrodes 5 are set to have heights adapted to the upper step portion 37 and the lower step portion 38, respectively.

  Further, as shown in FIG. 4 (B), the displacement dimension L may be eliminated and the guide pin 6 may be elongated to correspond to the step shape of the steel plate part 7.

  4 (A) shows a case where the curved portion 40 is formed in the steel plate part 7 and corresponds to the arrangement of the supply rod 10 similar to the case of the stepped shape.

  The operational effects of the first embodiment are as follows.

  The plurality of nuts 1 held by the holding portions 18 exactly match the welding location of the steel plate part 7 when the advance / retract type supply unit 48 and / or 49 advances and the supply rod 10 stops at a predetermined position. . In this state, the air cylinder 13 operates, the nut 1 is supplied to the guide pin 6, the nut 1 and the steel plate part 7 are pressurized between the electrodes, and the welding current is energized to complete the welding.

  Accordingly, since the plurality of nuts 1 are supplied to the plurality of predetermined guide pins 6 at a time or continuously, the parts supply to the electric resistance welding machine is efficiently performed, and the time of the welding process is shortened. Therefore, it is effective for improving productivity. Furthermore, since the nut holding position of the supply rod 10 can easily correspond to the welded portion of the steel plate component 7, the nut 1 is accurately supplied to the guide pin 6, and the operation accuracy as the component supply device is improved. .

  When the air cylinder 13 is operated, the nut 1 held by the supply rod 10 also moves in the direction of the electrode axis OO. The electrode is usually provided with a guide pin 6 coaxial with the electrode axis OO. Therefore, in the case of a component having a shape such as the projection nut 1, the nut is held with the guide pin 6 passing through the screw hole 3 of the nut by the movement of the nut 1. In this way, the nut 1 is accurately and efficiently supplied to the guide pin 6 of the fixed electrode 5 by the operation of the air cylinder 13.

  Then, by selecting the number of the advancing / retracting supply units 48 and 49 to be attached to the base member 8 and the mounting posture, it is possible to accurately supply the parts suitable for the shape of the counterpart steel plate part 7 and the welding location of the nut 1. Can be done.

  Each of the advancing / retracting supply units 48 and 49 is configured to perform a supply operation independently.

  As described above, since each of the advancing / retracting supply units 48 and 49 performs a supply operation independently, the parts are supplied to a plurality of locations of the steel plate parts 7 at a time to improve productivity. Can be increased. Alternatively, the advancing / retracting supply units 48 and 49 are sequentially operated to sequentially supply nuts to a plurality of locations in a predetermined order, and the parts can be supplied in an order that is convenient for improving the shape of the steel sheet part 7 and the supply efficiency. . For example, by starting the supply rod 10 having a long advancing distance in advance and starting the supply rod 10 having a short advancing distance later, an advantage that a plurality of nuts 1 are supplied almost simultaneously can be obtained. Alternatively, depending on the bent shape or curved shape of the steel plate part 7, the nut 1 is supplied in advance to one place, and then the nut 1 is supplied to another place. By doing so, even for the steel plate part 7 having a shape that is difficult to be supplied, smooth nut supply is realized by stepwise supply such as the first supply and the second supply.

  The base member 8 has such a shape that each of the advancing / retracting supply units 48 and 49 can supply a part to a portion that is adapted to the shape of the steel plate part 7 such as bending or bending.

  Since the shape of the base member 8 itself is adapted to the shape of the steel plate part 7, it is easy to adapt each of the advancing and retracting supply units 48 and 49 attached to the base member 8 to the shape of the steel plate part 7. For example, in the case of the steel plate part 7 having a step, the above-described advantage can be secured by making the base member 8 in a step shape.

  A permanent magnet 23 that holds the nut 1 is provided in the holding portion 18.

  Thus, since the nut 1 is firmly adsorbed to the holding portion 18, even if vibration or any external force acts on the nut 1 when the supply rod 10 advances, the nut 1 can be easily removed from the holding portion 18. A reliable component supply operation can be obtained without any detachment.

  A tube member 25 that supplies the nut 1 to the holding portion 18 is attached to the stationary member 12.

  Since each pipe member 25 connected to the plurality of holding portions 18 is attached to the stationary member 12, the nut 1 of a predetermined type and size is appropriately supplied to each holding portion 18, and the supply accuracy of the nut 1 is improved. Always maintained.

  A pipe member 25 that supplies the nut 1 to the holding portion 18 is attached to the supply rod 10.

  As shown in FIG. 2D, the tube member 25 moves forward and backward together with the supply rod 10, so that the nut 1 holds the next nut 1 from the tube member 25 immediately after being supplied to the guide pin 6. 18 can be led. Therefore, the next nut 1 can be introduced using the time during which the supply rod 10 is retreating, and the introduction of the nut into the holding portion 18 and the retraction of the supply rod 10 are synchronized to reduce the time. be able to.

  The component is the projection nut 1 supplied to the guide pin 6 of the fixed electrode 5.

  The guide pin 6 enters the screw hole 3 of the projection nut 1 relatively. Therefore, the support state of the nut 1 at the target location becomes stable.

  FIG. 5 shows a second embodiment.

  In this embodiment, an upper electrode 43 and a lower electrode 44 to which the nut 1 is supplied operate on a steel plate part 7 fixed to a jig (not shown). The upper electrode 43 is provided with an upper guide pin 45 that penetrates through the lower hole of the steel plate part 7, and a guide hole 46 is formed at the center thereof. On the other hand, the lower electrode 44 is provided with a lower guide pin 47 that can support the nut 1 and can enter the guide hole 46. Since the other configuration is the same as that of the previous embodiment, the illustration is omitted. The same reference numerals are used for members having similar functions.

  In FIG. 5A, the upper guide pin 45 of the upper electrode 43 that has descended into the pilot hole of the steel plate part 7 has entered, and the nut 1 that has been supplied to the lower guide pin 47 by the supply rod 10 described above. The held state is shown. Here, as shown in FIG. 5B, when the lower electrode 44 is raised, the lower guide pin 47 enters the guide hole 46 and the nut 1 and the upper guide pin 45 are aligned. Then, as shown in FIG. 3C, when the lower electrode 44 is raised, the upper guide pin 45 is pushed in by the nut 1, and the nut 1 and the steel plate part 7 are sandwiched between both electrodes 43 and 44. In this state, a welding current is applied to complete welding.

  With such a configuration, the nut 1 is accurately positioned with respect to the pilot hole of the steel plate part 7 and high-precision welding is realized. Other functions and effects are the same as in the previous embodiment.

  FIG. 7 shows a third embodiment.

  The component handled in the third embodiment is an iron projection bolt 50 shown in FIG. 6B. Hereinafter, it may be simply expressed as a bolt. The bolt 50 includes a shaft portion 51 in which a male screw is cut, a flange portion 52 having a circular shape concentric with the shaft portion 51, and a circular welding protrusion 53 provided at the center of the flange portion 52. . Note that a projection bolt 50 of a type in which a plurality of welding protrusions 53 are arranged on one circumference may be used.

  The end portion 19 of the supply rod 10 is provided with a concave portion 54 whose front end is open, and an arc portion 55 that matches the outer periphery of the flange portion 52 is provided at the back thereof, and the holding portion 59 is formed by such a concave portion shape. ing. A groove 56 that accommodates the welding projection 53 is formed at the center of the recess 54 in a state of being opened to the distal end side of the supply rod 10, and a permanent magnet 57 is embedded on the upper surface side of the supply rod 10.

  When the supply rod 10 is in the most retracted position, the component supply pipe 58 is arranged in a state of being aligned with the lower side of the recess 54. The component supply pipe 58 extends from a parts feeder (not shown) and is fixed to the stationary member 12. A receiving hole 61 coaxial with the electrode axis OO is provided at the center of the movable electrode 60 that advances and retreats in the vertical direction. A permanent magnet 62 for attracting and holding the bolt 50 is fixed to the inner part. The steel plate part 7 is supported by a jig (not shown) or the like, and a fixed electrode 63 is disposed on the upper side thereof. Since other configurations are the same as those of the previous embodiments, members having the same function are denoted by the same reference numerals.

  The projection bolt 50 transferred from the component supply pipe 58 to the holding portion 59 is attracted by the permanent magnet 57 as attraction means and is held there. In this state, the supply rod 10 advances to the position shown by the two-dot chain line and stops at a position where the shaft portion 51 is coaxial with the receiving hole 61. Then, the supply rod 10 is lowered and the shaft portion 51 enters the receiving hole 61. Thereafter, when the supply rod 10 is retracted, only the bolt 50 remains in the receiving hole 61 and the supply rod 10 returns to the original position. Here too, a square motion as indicated by reference numeral 15 is executed.

  The operational effects of the third embodiment are basically the same as those of the previous embodiments. The only difference is that the component is not the projection nut 1 but the projection bolt 50, and the support state of the bolt 50 itself is stable.

  FIG. 8 shows a fourth embodiment.

  In this embodiment, a plurality of nuts 1 are continuously welded to a pressed part delivered from a pressing device 65. A long material plate 66 wound in a roll shape is sequentially processed by a press device 65, and a drilling step 68 for opening a lower hole 67 through which the guide pin 6 of the fixed electrode 5 passes, A step 69 of bending a part in an upright state and a step 70 of bending the flange in the upright portion in the bending step are arranged at a predetermined processing pitch. The cross-sectional shape of the part thus pressed is shown in FIG. 8B, which is a BB cross-section of FIG.

  A plurality of nuts 1 are welded to the steel plate part 7 fed from the pressing device 65 so as to match the processing pitch. For this purpose, a guide pin penetration process 71 in which the electrode guide pins 6 penetrate the steel plate part 7, an adjacent nut supply process 72, and an adjacent pressurization energization process 73 are arranged. The single steel plate part 7 is used. Reference numeral 64 denotes a movable electrode.

  Steps 71, 72 and 73 as described above are continued endlessly. For this purpose, a mechanism using square motion or a mechanism using an endless chain can be employed. Here, the latter method is adopted.

  That is, a large number of conveying plates 76 driven by the endless chain 75 are continuously connected via the connecting shaft 77, and the fixed electrodes 5 and the guide pins 6 are arranged on these conveying plates 76. Here, since the two nuts 1 are welded, the two fixed electrodes 5 are attached to the conveying plate 76. A connecting member 78 fixed to the conveying plate 76 is engaged with the endless chain 75.

  Further, it is necessary that the guide pin 6 does not protrude before the guide pin 6 penetrates the steel plate part 7. For this purpose, as shown in FIG. 8C, the forward / backward drive unit 79 prevents the fixed electrode 5 from protruding. The advancing / retreating drive unit 79 can employ various types such as an air cylinder type and an electromagnetic drive type. Here, it is the latter type. An electromagnetic solenoid 80 is attached to the lower surface of the conveying plate 76, and a guide pin 6 is coupled to a member 81 that moves forward and backward by the solenoid 80.

  Therefore, when the steel plate part 7 is placed on the fixed electrode 5, the guide pin 6 is retracted, and when the lower hole 67 is coaxial with the guide pin 6, the guide pin 6 advances and protrudes from the steel plate part 7. . When the steel plate part 7 is fed by 1 pitch, the nut 1 is supplied to the protruding guide pin 6 by the supply rod 10 this time. Then, when the steel plate part 7 is further fed by 1 pitch, the movable electrode 64 descends and pressurization and energization are performed. Since other configurations are the same as those of the previous embodiments, members having the same function are denoted by the same reference numerals.

  With such a configuration, it is possible to weld a plurality of nuts 1 to a pressed part, that is, a steel plate part 7 in conjunction with a continuous processing type pressing device, and systematically combine pressing and welding of a plurality of parts for production. The improvement of sex is greatly promoted. Other functions and effects are the same as those of the previous embodiments.

  Although various air cylinders are employed in the above-described embodiments, an electric motor that performs forward / backward output may be employed instead. Further, in order to perform the operation as described above, although not shown, it is easily performed using a control device such as a normal sequencer, a sensor, an air switching valve operated by the control device, or the like. Can do.

  As described above, according to the present invention, a plurality of parts can be accurately and efficiently supplied to the guide pins and the receiving holes of the electrodes, so that the vehicle body welding process for automobiles, the sheet metal welding process for household appliances, and the like are wide. Can be used in industrial fields.

It is the side view and front view which show the whole apparatus. It is a top view of a component supply member, and sectional drawing of each part. It is the top view and vertical side view of a component supply member. It is sectional drawing of the front-end | tip part of a component supply member. It is sectional drawing which shows the example of a combination of another electrode. It is a perspective view of components. It is a figure of each part which shows the example of a projection bolt. It is a side view which shows the combination with a press apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projection nut 5 Fixed electrode 6 Guide pin 7 Steel plate part 10 Component supply member, supply rod 11 Air cylinder OO Electrode axis 13 Air cylinder 18 Holding part 21 Recess 23 Permanent magnet 24 Supply passage means 25 Pipe member 40 Curved part 48 Advancement and retraction Type supply unit 49 advance / retreat type supply unit 50 projection bolt 59 holding part 60 movable electrode 61 receiving hole 63 fixed electrode

Claims (1)

In a part where a part is supplied to a guide pin or receiving hole of an electric resistance welding electrode which is a target part and welded to a steel plate part, a part supply member provided with a holding part for the part is attached to an advancing / retreating drive means to advance / retreat supply unit is constructed, the component supply to the location where said attaching a plurality of the retractable type supply unit based member having a shape adapted to the stepped shape of the steel sheet part the reciprocating type supply unit is adapted to the stepped shape of the steel sheet part The component held by the component supply member is configured to move in the axial direction of the electrode in a state where the axis of the component is coaxial with the axis of the electric resistance welding electrode, and is attached to the stationary member. was lifting means is attached to said base member, to characterized in that the moving direction of the moving direction and the elevating means of the reciprocating type supply unit is configured to be orthogonal Electric resistance welding machine component feeder.

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