JP2005040858A - Welding unit mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a welding unit mechanism where the relative positions of the electrodes in a welding device and the advancing tip of each feed rod in component feeders can correctly be obtained. <P>SOLUTION: Welding equipment 66 in which a movable electrode 6 making a pair with a fixed electrode 8 is fitted to a forward/backward driving means 68, and component feeders 82 and 84 feeding components 10 to objective places by feed rods 2 and 87 moving forward or backward are integrated via joining members 79, 91, 90, 94 or the like so that the tip positions of the forward feed rods 2 and 87 and the tips of the movable electrode 6 lie in prescribed relative positional relation. By the integration, the relative positions of the electrodes in the welding equipment and the forward tips in the feed rods of the component feeders can correctly be obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a welding unit device in which a welding device and a component supply device are combined.

  2. Description of the Related Art A component supply device that supplies a component to a target location with a supply rod that moves forward and backward is combined with a welding device having a fixed electrode and a movable electrode, and a projection bolt or a projection nut is welded to a steel plate component.

In such a combination of a component supply device and a welding device, electrical resistance welding is performed by accurately supplying a component such as a projection bolt to a predetermined part of a counterpart component such as a steel plate component set in the welding device. ing.
Japanese Patent Laid-Open No. 7-276061

  In the combination of the parts supply device and the welding device as described above, the relative position between the tip position of the supply rod that the component supply device has advanced and a predetermined location such as a steel plate component set in the welding device is accurately set. There is a need to. In particular, fine-tuning and setting the above relative position on the factory floor is a very difficult task due to location restrictions, etc., and it may be difficult to accurately determine the relative position. is there. Furthermore, since the position where the component supply device is arranged cannot be freely changed, a steel plate component set in the welding device interferes with the component supply device or other nearby devices, and the steel plate is to be avoided. Restrictions are imposed on the size and shape of parts and the like, and as a result, productivity cannot be sufficiently improved.

  The welding unit device according to the first aspect of the present invention is a welding device in which a movable electrode paired with a fixed electrode is attached to an advancing / retreating drive means, and a component supply for supplying a component to a target location by a supply rod that moves forward and backward The apparatus is integrated through a coupling member so that the tip position of the advanced supply rod and the tip part of the movable electrode or fixed electrode are in a predetermined relative positional relationship. And

  Since the leading end position of the supply rod that has advanced and the leading end portion of the movable electrode or fixed electrode are integrated via the coupling member so as to have a predetermined relative positional relationship, the shape and dimensions of the coupling member, etc. Is set appropriately, the tip position of the supply rod that has advanced and the tip of the movable electrode or the fixed electrode have a predetermined relative positional relationship. That is, by selecting the shape and size of the coupling member, the welding device and the component supply device are integrated via the coupling member, and at the same time, the relative position between the distal end position of the supply rod and the distal end portion of the movable electrode or fixed electrode The position is set correctly. Therefore, since the relative position is correctly set in advance at the time of manufacturing the welding unit device, it is possible to avoid the difficult work of setting the relative position with the welding device in a narrow place after bringing the parts supply device into the factory. be able to. Further, since the welding unit device is completed in advance, the relative position between the welding device and the component supply device can be set with high accuracy using a jig or the like, and a high-quality welding unit device can be provided to the customer.

  According to a second aspect of the present invention, in the welding unit device of the present invention, when a fixing member for fixing the welding device to the stationary member is provided, the welding device integrated through the coupling member. And the component supply device are fixed to the stationary member in a unit state. In this way, only the welding device is coupled to the stationary member, and no external force acts on the component supply device. Therefore, a predetermined relative positional relationship between the advanced position of the supply rod that has advanced and the distal end portion of the movable electrode or the fixed electrode. There is no upset, and normal parts supply and welding can always be performed.

  According to a third aspect of the present invention, in the welding unit device of the present invention, the fixing member is configured in a state in which a member main body and a fixed shaft member are integrated, and the member main body is provided at an end of the advance / retreat driving means. The welding unit device is fixed to the stationary member by coupling the stationary shaft member to the stationary member, and the axis of the stationary shaft member is provided substantially coaxial with the advance / retreat axis of the movable electrode. When the rotation position of the welding unit device can be selectively set by rotating the member main body around the member, the fixing member coupled to the end of the advancing / retreating drive unit is used as described above. Then, the welding unit device is fixed to the stationary member. At the same time, the rotation position of the entire welding unit device can be freely selected by a fixed shaft member that is almost coaxial with the advance / retreat axis of the movable electrode, so that it matches the size and shape of the counterpart device such as a nearby device or steel plate component. Thus, the mounting position of the welding unit device can be optimized.

  According to a fourth aspect of the present invention, in the welding unit device of the present invention, when the coupling member is integrated with the fixing member, the coupling member that is a member that supports the component supply device is integrated with the fixing member. Therefore, the coupling rigidity of the coupling member can be increased, and the coupling stability of the component supply device can be improved. Moreover, since the fixing member and the coupling member are integrated, the structure of the base member for attaching the component supply device and the welding device to the stationary member can be simplified, and the unit of the welding unit device as a whole becomes compact.

  As described in claim 5, in the welding unit device of the present invention, when a plurality of component supply devices that can supply different types of components to the coupling member or the auxiliary member integrated therewith are attached, For example, it can function as a projection bolt welding unit at the same time as a projection bolt welding unit, and can be multi-functional as a welding unit device, reducing the space required for equipment layout and the equipment price. Can be reduced.

  7. The welding unit apparatus according to claim 6, wherein the component is a projection bolt with a flange having a welding projection and / or a projection nut having a welding projection. Bolts and projection nuts can be freely selected and welded, and a highly useful welding unit device can be obtained.

  The fixing member is configured in a state in which a member main body and a fixed shaft member are integrated, and the member main body is coupled to an end portion of the advance / retreat driving means, and the fixed shaft member is coupled to a stationary member, thereby welding unit apparatus. Is fixed to the stationary member, and the axis of the fixed shaft member is substantially coaxial with the advance / retreat axis of the movable electrode. By rotating the member body around the fixed shaft member, the welding unit apparatus The rotational position can be selectively set.

  The first embodiment shown in FIGS. 1 to 4 will be described.

  In the welding device 66, the movable electrode 6 and the fixed electrode 8 are arranged on the advance / retreat axis OO of the movable electrode 6, and the movable electrode 6 is advanced and retracted by the advance / retreat driving means 68 constituted by the air cylinder 67. . A fixing member 69 is coupled to the upper end of the air cylinder 67. The fixing member 69 is composed of a U-shaped member main body 70 and a fixed shaft member 71 integrated with the member main body 70. The operation axis of the movable electrode 6, the axis of the air cylinder 67, and the axis of the fixed shaft member 71 are coaxially arranged with respect to the advance / retreat axis OO.

  A support arm 73, which is a stationary member, is coupled to the upper portion of the support 72 of the welding device 66, and a fixed shaft member 71 is inserted into a mounting groove 74 provided in the support arm 73 that penetrates in the vertical direction. The fixed shaft member 71 is formed with a male screw, and a nut 75 is tightened on the fixed shaft member 71 to attach the welding device 66 to the stationary member. On the other hand, the fixed electrode 8 is coupled to a fixed arm 76 protruding from the column 72. A bolt 77 is coupled to the upper portion of the air cylinder 67 and penetrates the member main body 70 to tighten a nut 78.

  By the combination of each member as described above, the welding device 66 including the air cylinder 67, the movable electrode 6, the fixed electrode 8, and the like disposed on the advance / retreat axis OO is disposed in a substantially vertical direction.

  A long coupling member 79 is coupled to the back surface of the member main body 70 of the fixing member 69. In this example, the coupling member 79 is coupled to the fixing member 69 by welding via an auxiliary member 80 described later. Four long holes 81 are formed in the connecting member 79, and a connecting bolt (not shown) is passed through the long hole 81, so that the component supply device 82 is connected to the connecting member 79. Therefore, the welding device 66 and the component supply device 82 are integrated through the fixing member 69 and the coupling member 79.

  The component supply device 82 has an advancing / retracting-type supply rod 2, and the tip position of the supply rod 2 when the supply rod 2 advances and the tip of the movable electrode 6 or the fixed electrode 8 have a predetermined relative positional relationship. The dimensions and shapes of the coupling member 79, the fixing member 69, and the like are set so as to be.

  When the nut 75 is loosened, the entire welding unit device in which the welding device 66 and the component supply device 82 are integrated can rotate about the advance / retreat axis OO. The rotation angle θ is an angle range shown in FIG. The component supply device 82 is rotated within this angular range, and the nut 75 is tightened at a position where it does not interfere with the related members in the vicinity, thereby fixing the welding unit device.

  Here, various types of detailed structures of the component supply device 82 can be adopted. In this example, the components shown in FIGS. 9 to 17 will be described.

  A supply rod 2 is accommodated in the guide tube 1 so as to be able to advance and retreat, and a piston rod (not shown) of an air cylinder 3 coupled to one end side of the guide tube 1 is coupled to the supply rod 2. When the holding member 4 for temporarily locking the component is coupled to the tip of the supply rod 2 and the holding member 4 is most retracted as shown by a two-dot chain line in FIG. It is configured to deliver. This is for feeding parts one by one to the holding member 4, and a parts feed control unit (hereinafter simply referred to as a unit) indicated by reference numeral 5 performs its function. This unit 5 is an air cylinder. 3 is coupled to the other end side of the guide tube 1 on the opposite side to 3.

  In this embodiment, a part is inserted into the receiving hole 7 of the movable electrode 6, and a steel plate part 9 is placed on the fixed electrode 8. The component in this embodiment is an iron projection bolt 10 shown in FIG. 10, and includes a shaft portion 11, a flange 12, and a welding projection 13 formed by raising the flange. The protrusion 13 has a very flat conical shape, but instead of this, a plurality (usually three) of small wart-shaped protrusions may be provided.

  In order to support an integral structure such as the guide tube 1, the supply rod 2, the air cylinder 3 and the unit 5, a substrate 14 is employed. The substrate 14 in this embodiment is mainly composed of a triangular portion 15 having a substantially right triangle shape, and the guide tube 1 is coupled to the lower side portion 16 thereof. In order to support the guide tube 1 more stably, the lower side portion 16 is provided with extension portions 17 and 18 as shown in FIGS. 9 and 11, and here, the lower side including the extension portions 17 and 18 is also provided. Part. Since the supply rod 2 is installed in an inclined posture, the lower side portion 16 is arranged in an inclined state, and the guide tube 1 is arranged at a lateral position thereof. Spacer members 20 and 21 are disposed between the guide tube 1 and the lower side portion 16, and are respectively welded to the guide tube 1. The lower side portion 16 is bolt 22 with respect to the spacer members 20 and 21. , 23. By doing so, a gap portion 24 is formed between the guide tube 1 and the lower side portion 16. In addition, the codes | symbols 25 and 26 in FIG. 11 are the holes for letting said volt | bolts 22 and 23 pass.

  A receiving plate 27 is welded to the upper side portion 19 of the substrate 14, and a reinforcing plate 28 is welded to the triangular portion 15 and the receiving plate 27 in order to increase the rigidity of this portion. The lower side of the air cylinder 29 is coupled to the receiving plate 27, and the upper side thereof is firmly coupled to the stationary member 31 via the bracket 30. In this air cylinder 29, a cylinder 32 is coupled to a stationary member 31 with a bracket 30, and a piston (not shown), that is, piston rods 33 and 34 are advanced and retracted to output. As shown in the figure, two piston rods are provided. It is an installed tandem type, and an output plate 35 is coupled to the lower ends of both piston rods 33, 34, which are brought into close contact with the receiving plate 27 and fixed with bolts 36, 37. In this way, the air cylinder 29 is fixed to the upper side portion 19 of the substrate 14, and the piston rods 33, 34 are arranged in the vertical direction.

  The bracket 30 corresponds to the coupling member 79 described above, and the stationary member 31 corresponds to the fixing member 69 and the support arm 73.

  The supply rod 2 is provided with an air passage 38 as is apparent from FIGS. 9, 13 and 17, etc., and a joint 39 is screwed into the supply rod 2 to supply air therethrough, -Connection 40 is connected. In order to allow the joint 39 to be stroked, a long hole 41 is opened in the guide tube 1 in the axial direction, and the joint 39 passes therethrough. The air hose 40 is arranged in the above-described gap portion 24, and the air hose 40 is arranged in a state in which the outer circumference of the guide tube 1 is spirally wound, and when the supply rod 2 advances, From the contracted state as shown in FIG. 13, the expanded state as shown in FIG. Reference numeral 42 in FIG. 13 denotes a clamp for fixing the air hose 40 to the guide tube 1.

  The holding member 4 fixed to the tip of the supply rod 2 will be described with reference to FIG. The distal end of the supply rod 2 is screwed into the main body 43 at the threaded portion 44 and is prevented from loosening by a lock nut 45, and a cylindrical guide member 46 is fixed to the distal end portion by a method such as welding. An annular magnet 47 is built inside, and a flange 48 formed on the inner peripheral portion of the guide member 46 is provided on the upper side thereof, and the flange 12 of the projection bolt 10 is attracted to the magnet 47 there. Temporarily locked. An inner through hole of the magnet 47 is an air nozzle 49, and an air passage 50 opened in the main body 43 communicates with the air nozzle 49, and on the other hand, communicates with the air passage 38 of the supply rod.

  The component feed control unit 5 may have any function as long as it has a function of supplying components from the component supply hose 51 connected to the part feeder 83 (see FIG. 1) one by one to the holding member 4. An example of this is shown in detail in FIG. The unit 5 will be described with reference to this figure. The unit 5 is attached to the end of the guide pipe 1 opposite to the air cylinder 3, and the bracket 52 is firmly fixed to the guide pipe 1 with bolts 53. The head member 54 is welded thereto, and a control piece 56 is slidably inserted into a through hole 55 having a rectangular cross section opened to the head member 54. An arm piece 57 is fixed to the upper surface of the head member 54, an air cylinder 58 is attached to the arm piece 57, and a piston rod 59 is coupled to the control piece 56.

  The head member 54, the control piece 56, and the bracket 52 are respectively provided with passage holes 60, 61, 62, and the passage hole 60 is welded to the head member 54 in a state where the joint pipe 63 is communicated therewith. 51 is inserted. The outlet hole 64 is also welded to the bracket 52 in a state where the outlet pipe 64 communicates with the passage hole 62. In the illustrated state, the bolt 10 is received by the control piece 56 because the control piece 56 is displaced, but the control piece 56 slides to the lower left by the operation of the air cylinder 58, and the passage hole 60, When 61 and 62 communicate with each other in series, the bolt 10 reaches the outlet pipe 64 through these passage holes and reaches the guide member 46 therefrom. The outlet pipe 64 is formed with a notch 65 for allowing the bolt 10 to pass when the supply rod 2 advances. Further, the outlet pipe 64 is in a relative position relationship such that when the holding member 4 is most retracted, the outlet pipe 64 is continuous with the guide member 46 leaving a slight gap as shown in FIG.

  In the above description, the illustration of the air hose connected to each air cylinder is omitted. Furthermore, since the operation air for each air cylinder necessary for obtaining the operation described below can be easily controlled by a combination of known means such as an electromagnetic air control valve and an electric control circuit, Detailed description is omitted.

  The operation of the above embodiment will be described. When the bolt 10 is received in the holding member 4 in the state shown in FIG. 14, the supply rod 2 advances by the operation of the air cylinder 3, and at this time, the air hose 40 extends. 9, the advancement of the supply rod 2 is stopped at the position where the bolt 10 is coaxial with the receiving hole 7, and then the operation of the air cylinder 29 raises the substrate 14. Part of the bolt 10 enters the receiving hole 7, and air is ejected from the air nozzle 49 at that time, so that the bolt 10 adsorbed by the magnet 47 is forced to reach the most part in the receiving hole 7. Inserted. After that, the supply rod 2 moves in the reverse direction to the previous operation, and returns to the original position as shown in FIG. The bolt 10 inserted in this way is attracted by a magnet 66 attached to the inner part of the receiving hole 7 to prevent falling. When the movable electrode 6 holding the bolt 10 is lowered and the projection 13 of the bolt is pressed against the steel plate part 9 and energization is performed between both electrodes, the projection 13 is welded.

  The operational effects of the first embodiment are as follows.

  That is, since the leading end position of the supply rod 2 that has advanced and the leading end portion of the movable electrode 6 are integrated via the coupling member 79 so as to have a predetermined relative positional relationship, the shape of the coupling member 79 By properly setting the dimensions and dimensions, the advanced tip position of the supply rod 2 and the leading end portion of the movable electrode 6 have a predetermined relative positional relationship. That is, by selecting the shape, size, etc. of the coupling member 79, the welding device 66 and the component supply device 82 are integrated via the coupling member 79, and at the same time, the distal end position of the supply rod 2 and the distal end portion of the movable electrode 6 are integrated. The relative position is correctly set. Therefore, since the relative position is correctly set in advance when the welding unit device is manufactured, it is difficult to set the relative position with respect to the welding device 66 in a narrow place after bringing the component supply device 82 into the factory. It can be avoided. Since the welding unit device is completed in advance, the relative position between the welding device 66 and the component supply device 82 can be set with high accuracy using a jig or the like, and a high-quality welding unit device can be provided to the customer. it can.

  Since the fixing member 69 for fixing the welding device 66 to the stationary member 73 is provided, the welding device 66 and the component supply device 82 integrated via the coupling member 79 are attached to the stationary member 73 in a unit state. Fixed. In this way, only the welding device 66 is coupled to the stationary member 73, and no external force acts on the component supply device 82. Therefore, a predetermined relative relationship between the advanced position of the supply rod 2 that has advanced and the distal end portion of the movable electrode 6 is provided. The positional relationship does not get out of order, and normal parts supply and welding can always be performed.

  The welding unit device is fixed to the stationary member 73 as described above by the fixing member 69 coupled to the end of the advance / retreat driving means 68. At the same time, the rotation position of the entire welding unit device can be freely selected by the fixed shaft member 71 which is substantially coaxial with the advance / retreat axis OO of the movable electrode 6, so that the counterpart device such as a nearby device or a steel plate component 9 can be selected. The mounting position of the welding unit device can be optimized according to the size and shape of the welding unit.

  When the coupling member 79 is integrated with the fixing member 69, the coupling member 79, which is a member that supports the component supply device 82, is integrated with the fixing member 69. The coupling stability of the component supply device 82 can be improved. Further, since the fixing member 69 and the coupling member 79 are integrated, the structure of the base member for attaching the component supply device 82 and the welding device 66 to the stationary member 73 can be simplified, and the unit as the whole welding unit device is compact. become.

  A second embodiment will be described with reference to FIGS.

  In this embodiment, a plurality of component supply devices capable of supplying different components are provided, and each component supply device is attached to the coupling member or an auxiliary member integrated therewith. The above-described component supply device 82 supplies and welds the projection bolt 10, but this embodiment further supplies and welds a projection nut, and is a combination type of the projection bolt and the projection nut. .

  In the component supply device 84 for supplying the projection nut, the projection nut sent from the parts feeder is guided to the temporary fixing chamber 86 through the component supply pipe 85 and temporarily locked there. The supply rod 87 passes through the screw hole of the projection nut in the temporarily locked state in a skewed state, and the supply rod 87 advances to supply the projection nut to the target location. The guide tube 88 that houses the supply rod 87, the air cylinder 89 that causes the supply rod 87 to advance and retreat, and the like are the same as those in the previous embodiment. The skewed projection nut 96 is shown in FIG.

  A bracket 90 is coupled to the guide tube 88, and a support rod 91 is fixed thereto. A thick plate-like auxiliary member 80 is welded to the member main body 70 of the fixing member 69 in a state of protruding to the side of the member main body 70, and the component supply device 84 is coupled to the auxiliary member 80 of the protruding portion. A clamp piece 94 having a groove 93 having a U-shaped cross section is coupled to the auxiliary member 80, and a support rod 91 is inserted into the groove 93 and tightened with a fixing bolt 95 penetrating the clamp piece 94. FIG. 7 shows a state where the tip position of the supply rod 87 that has advanced and the tip part of the fixed electrode 8 (see 99 and FIG. 8) are in a predetermined relative positional relationship. Even if the relative positional relationship is set with the tip of the fixed electrode 8, the relative positional relationship between the fixed electrode 8 and the movable electrode 6 when the movable electrode 6 is stopped is always constant. Are the same. The same applies to the supply rod 2.

  The mounting posture of the bracket 90 with respect to the guide tube 88, the rising direction of the support rod 91, the direction of the groove 93, and the like are selected so that the supply rod 87 has the positional relationship shown in FIG. In this embodiment, the clamp piece 94 is attached to the auxiliary member 92. However, the auxiliary member 92 may be stopped and the clamp piece 94 may be directly fixed to the member main body 70.

  In FIG. 8, the fixed arm 76 is a rotary type as indicated by an arrow line 97 so that the fixed electrode can be selected. This is because when the supply rod 2 is operated, the rotation position of the fixed arm 76 is set so that the corresponding fixed electrode 8 is coaxial with the movable electrode 6, and when the supply rod 87 is operated. The rotation position of the fixed arm 76 is set so that the fixed electrode 99 having the corresponding guide pin 98 is coaxial with the movable electrode 6.

  Therefore, according to the second embodiment, a plurality of component supply devices 82 and 84 that can supply different types of components to the fixing member 69 or the auxiliary member 92 integrated therewith are attached. It can function as a welding unit for projection nuts at the same time as a bolt welding unit, and can be used as a versatile welding unit, reducing the space required for equipment layout and reducing equipment costs. It becomes possible.

  Since the component is the projection bolt 10 with a flange having a welding projection and / or the projection nut 96 having a welding projection, the projection bolt 10 and the projection nut 96 can be freely selected and welded. A highly useful welding unit device can be obtained.

  In the above embodiment, the advance / retreat driving means 68 can be replaced with an electric motor to output the advance / retreat operation. Further, a male screw is formed over the entire length of the fixed shaft member 71, a nut similar to the nut 75 is disposed on the fixed shaft member 71 below the support arm 73, and both the upper and lower nuts are adjusted to adjust the welding device 66 and the support arm. The relative position in the vertical direction with respect to 73 can be determined arbitrarily. The position of the coupling member 79 can be finely adjusted along the long hole 81. Since such two-way fine adjustment is possible, it is easy to appropriately obtain the relative position between the movable electrode 6 and the fixed electrode 8.

  As described above, the present invention can be widely used because it can be distributed to customers in a state where the relative positional relationship between the welding device 66 and the component supply devices 82 and 84 is set correctly in advance. .

It is a side view of the whole welding unit apparatus which shows 1st Example. It is a top view of the part of a support arm. It is a top view of a coupling member and a fixing member. It is a three-dimensional view of a coupling member and a fixing member. It is a top view provided with the some component supply apparatus which shows a 2nd Example. It is a three-dimensional view which shows another component supply apparatus. It is a side view which shows the positional relationship of multiple types of supply rod and an electrode. It is a front view of a fixed arm. It is a side view of a component supply apparatus. It is a side view of a projection bolt. FIG. It is (4)-(4) sectional drawing of FIG. It is the side view which removed the board | substrate and showed the guide pipe edge part. It is a vertical side view of a component supply control unit. It is a top view of a guide pipe edge part. It is a top view of a guide pipe edge part. It is (9)-(9) sectional drawing of FIG.

Explanation of symbols

2 Supply rod 6 Movable electrode 8 Fixed electrode 10 Projection bolt 66 Welding device 68 Advancing / retracting drive means 69 Fixed member 70 Member main body 71 Fixed shaft member 73 Support arm, stationary member 79 Connecting member 80 Auxiliary member 82 Component supplying device 84 Component supplying device 87 Supply rod 96 Projection nut

Claims (6)

  A welding apparatus in which a movable electrode that is paired with a fixed electrode is attached to the advancing / retreating drive means, and a component supply apparatus that supplies a component to a target location with a supply rod that performs advancing / retreating operation has advanced through the coupling member. A welding unit device, wherein a leading end position of a supply rod and a leading end portion of the movable electrode or fixed electrode are integrated so as to have a predetermined relative positional relationship.   The welding unit apparatus according to claim 1, further comprising a fixing member that fixes the welding apparatus to a stationary member.   The fixing member is configured in a state in which a member main body and a fixed shaft member are integrated, and the member main body is coupled to an end portion of the advance / retreat driving means, and the fixed shaft member is coupled to a stationary member, thereby welding unit apparatus. Is fixed to the stationary member, and the axis of the fixed shaft member is substantially coaxial with the advance / retreat axis of the movable electrode. By rotating the member body around the fixed shaft member, the welding unit apparatus The welding unit apparatus according to claim 2, wherein the rotation position can be selectively set.   The welding unit device according to claim 2 or 3, wherein the coupling member is integrated with the fixing member.   The welding unit device according to any one of claims 1 to 4, wherein a plurality of component supply devices capable of supplying different types of components are attached to the coupling member or the auxiliary member integrated therewith.   The welding unit apparatus according to claim 1, wherein the component is a projection bolt with a flange provided with a welding projection and / or a projection nut provided with a welding projection.

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