JP4766326B2 - Parts supply equipment for welding equipment - Google Patents

Description

  The present invention relates to a component supply device for a welding apparatus in which a moving electrode is a supply position where a component is supplied to a holding portion thereof, and a welding position where the moving electrode can be moved from the supply position to weld the component to a counterpart member. Yes.

Japanese Patent No. 2509103 discloses a technique in which the moving electrode reciprocates between the supplied position and the welding position. This is because the component is supplied from the supply rod at the supply position where the movable electrode is most retracted, and then the movable electrode linearly advances and moves to the welding position, where the component is pressed against the mating member and energized with welding current. Is to be made.
Japanese Patent No. 2509103

  As described above, when the moving electrode reciprocates between the supplied position and the welding position, another member such as a component supply pipe may enter the space required for the reciprocating movement of the moving electrode. There is a problem that the moving electrode interferes with this member. In particular, when the reciprocating movement is performed by a rotational movement, it is indispensable to prevent a component supply pipe or the like from entering the rotational space.

  As described above, when the reciprocating movement is a rotational movement, when the length of the moving electrode is changed, the radius of rotation between the rotation center and the moving electrode tip increases or decreases, Since the supplied position and the welding position are displaced, it is necessary to provide the component supplying apparatus with a mechanism capable of following this displacement.

  The present invention has been provided to solve the above-described problems, and when a supply position and a welding position of a moving electrode change, a mechanism capable of following the change is provided in the component supply device. Objective.

Means to solve the problem

According to a first aspect of the present invention, there is provided a welding apparatus to which the component supply device is mounted, at least a rotating base member that is coupled to a rotating shaft and has a moving electrode attached thereto, and a rotation driving unit that rotates the rotating shaft. And a movable electrode that forms a pair with the moving electrode, and the rotation angle of the rotation driving means is determined from the supplied position where the component from the component supply device is supplied to the holding portion of the moving electrode, and the supplied position. The component supply device is set so as to take a welding position where the component can be rotated and welded to the counterpart member, and the component supply device includes a separation adjusting unit that separates the component supply passage member from the rotational movement space of the moving electrode; A holding head for holding the component, and a holding position for receiving the component from the supply passage member and a supply position for supplying the component to the moving electrode. The reciprocating drive means for reciprocating between positions, the advancing / retreating drive means for moving the holding head to the moving electrode side to the predetermined position and performing the up / down stroke in the vertical direction, and adjusting the reciprocating distance between the receiving position and the supply position Reciprocating distance adjusting means, and interval adjusting means for adjusting the distance between the holding head and the moving electrode, and the axis of the rotary shaft is a reciprocating direction line of the reciprocating operation by the reciprocating driving means and the reciprocating drive. A support plate is coupled to the base member or the advancement / retraction plate that is perpendicular to the direction line of the advance / retreat stroke by the means, and is connected to the advance / retreat drive means. The separation adjusting means is arranged in a state where the position of the base plate or the advance / retreat plate can be adjusted, and the fixing plate is integrated with the upper end of the support plate in a substantially horizontal posture. It is a welding device for the component supply apparatus characterized by wherein said supplying passage member is coupled to supply parts to the holding head to the fixed plate.

The invention's effect

  When the length of a component held by the moving electrode, for example, a shaft-shaped component such as a projection bolt is changed, the length of the moving electrode is also changed accordingly. When such a change is made, the radius of rotation between the rotation center of the moving electrode and the tip of the moving electrode increases or decreases, and the supply position and the welding position of the moving electrode move. When the turning radius is increased, it is necessary to prevent the location of the supply passage member such as the component supply pipe from entering the moving space of the moving electrode and to change the position of the holding head. Further, when the turning radius becomes small, the position of the holding head must be changed, and the arrangement position of the supply passage member must be changed in accordance with the change of the position of the holding head.

  When the rotation radius is increased, the supply passage member such as the component supply pipe is adjusted so as not to enter the rotation space of the moving electrode by adjusting the separation adjusting means. Along with this, the interval adjusting means is adjusted to increase the interval from the rotation center to the holding head so that the interval between the moving electrode waiting at the supplied position and the holding head is optimized. Further, the reciprocating distance of the reciprocating drive means is adjusted by the reciprocating distance adjusting means so that the holding head at the receiving position matches the position of the supply passage member.

  On the other hand, when the rotation radius is small, the supply path member such as the component supply pipe is adjusted not to be too far from the rotation space of the moving electrode by adjusting the separation adjusting means, and the reciprocating distance of the reciprocating driving means is adjusted. Can be prevented from becoming excessive, and the entire space of the apparatus can be prevented from becoming excessive. Accordingly, the distance from the center of rotation to the holding head is reduced by adjusting the distance adjusting means so that the distance between the moving electrode waiting at the supply position and the holding head is optimized. Further, the reciprocating distance of the reciprocating drive means is adjusted by the reciprocating distance adjusting means so that the holding head at the receiving position matches the position of the supply passage member.

  In this way, by combining the adjustment of the separation adjusting means, the interval adjusting means, the reciprocating distance adjusting means, etc., it becomes possible to operate the component supply device normally in response to the increase or decrease of the turning radius. .

  In particular, the welding apparatus includes at least a rotating base member that is coupled to a rotating shaft and to which a moving electrode is attached, a rotation driving means that rotates the rotating shaft, and a movable electrode that is paired with the moving electrode. The rotation angle of the rotation drive means is determined by the supplied position where the component from the component supply device is supplied to the holding portion of the moving electrode, and the welding position where the component is welded to the counterpart member by rotating from the supplied position. It is possible to ensure normal parts supply operation by combining the adjustment of the separation adjusting means, the interval adjusting means and the reciprocating distance adjusting means, etc. This is effective when a welding apparatus is additionally equipped with a parts supply device.

Before SL holding head that is disposed on the base member which is moved by the advancing drive means.

  Since the holding head is arranged on the base member that moves together with the advance / retreat driving means in this way, the holding head is displaced in accordance with the operation of the advance / retreat driving means, and the holding head and the moving electrode waiting at the supply position are The interval is set appropriately and an accurate operation can be obtained.

Before SL reciprocating drive means, Ru der of the type for advancing and retracting the holding head in a linear direction.

  By such reciprocation of the holding head in the linear direction, a highly reliable component supply device can be obtained.

Before SL reciprocating drive means, Ru der of the type for advancing and retracting the retaining head in an arcuate direction.

  By such reciprocation of the holding head in the arc direction, a highly reliable component supply device can be obtained.

Before SL reciprocal distance adjusting means, Ru mechanism der to adjust the forward and backward length of the reciprocating drive means for linearly reciprocating the holding head.

  Using such a mechanism for adjusting the advance / retreat length of the reciprocating drive means, the relative position between the receiving position of the holding head and the supply passage member can be accurately set.

Before SL reciprocal distance adjusting means, Ru mechanism der to adjust the arc movement radius of the reciprocating drive means for arc moves the holding head.
The front Symbol reciprocating drive means, that is formed by a drive unit which converts a rotational motion of the rotation output means into linear motion.

Using such a mechanism for adjusting the arc moving radius of the reciprocating drive means, the relative position between the receiving position of the holding head and the supply passage member can be set accurately.
By using the drive unit, the structure can be simplified. And it becomes easy to control by comprising a drive unit with an electric motor.

  Next, the best mode for carrying out the welding apparatus component supply apparatus of the present invention will be described.

  1 to 5 show a first embodiment.

  The parts to be welded in Example 1 will be described.

  The part is a shaft-like part, and is a steel projection bolt 1 here as shown in FIG. The projection bolt 1 includes a shaft portion 2 on which a male screw is formed, a disc-shaped flange portion 3 formed integrally with the shaft portion 2, and a circular welding protrusion provided at the center portion of the flange portion 3. It is composed of four. In the following description, the projection bolt may be simply expressed as a bolt.

  Next, a welding apparatus to which the component supply device is attached will be described.

  As shown in FIGS. 1 to 3, a flat base 7 made of a thick plate is firmly supported on a support leg 6 erected from a floor 5 of a factory. Two bearing members 9, 9 are fixed to a support base 8 attached to the base 7, and a rotating shaft 10 is supported by the two bearing members 9, 9. A square block-shaped rotary base member 11 is coupled to the end of the rotary shaft 10, and a moving electrode 12 is coupled to the rotary base member 11. The moving electrodes 12 are arranged on a straight line with an interval of 180 degrees. The axis of the rotary shaft 10 is parallel to the base 7 and is perpendicular to the paper surface of FIG. The axis of the moving electrode 12 is orthogonal to the axis of the rotating shaft 10 as is apparent from each drawing.

  The moving electrode 12 includes a “supplied position” where the bolt 1 is supplied from a component supply device 100 described later, and a “welding position” where the bolt 1 held by the moving electrode 12 is welded to the steel plate component 13 which is a counterpart member. 2 positions are taken. Here, the two moving electrodes are arranged at an interval of 180 degrees as described above, the lower electrode position in FIG. 1A is the “supplied position”, and the upper electrode position is the “weld position”. is there. Bolt 1 is held on moving electrode 12 in the “welding position”, and steel plate component 13 is placed thereon. A movable electrode 14 paired with the moving electrode 12 is arranged coaxially with the moving electrode 12.

  Various methods can be employed as the method of rotating the moving electrode 12. For example, a stepping motor that rotates at a predetermined angle is attached to the rotary shaft 10 or a rack and pinion mechanism is employed. Here, the latter structure is adopted. That is, the rack 17 is engaged with the pinion 16 attached to the rotating shaft 10, and the rack 17 is advanced and retracted to reciprocate the movable electrode 12 over 180 degrees. The forward / backward movement of the rack 17 is performed by an air cylinder 18 as shown in FIG. The air cylinder 18 is fixed to the base 7 by a support member 19.

  In addition, the column 20 is fixed on the base 7 in a standing state, and an air cylinder 21 for moving the movable electrode 14 forward and backward is fixed to the upper portion.

  The distance from the rotation center of the rotating shaft 10 to the tip of the moving electrode 12 is the rotating radius. When the rotating shaft 10 rotates, the rotating space 22 of the moving electrode 12 becomes like a circular line shown in FIG. .

  A cylindrical portion 23 is formed adjacent to the rotating base member 11, and a contactor 24 for energization is press-contacted thereto. The advancing and retracting operation of the contactor 24 is performed by an air cylinder 25 fixed to the support leg 6. Further, the stopper arm 26 is fixed to the rotary shaft 10, and the stop position of the rotary shaft 10 is set by the stopper bolt 27. As shown in FIG. 1A, the stopper bolts 27 are arranged at two positions at intervals of 180 degrees and are attached to a support plate 28 fixed to the support base 8. Reference numeral 29 denotes a damper that applies a buffering action to the stopping operation of the stopper arm 26.

  A holding part is provided to hold the bolt 1 on the moving electrode 12. This holding part is the receiving hole 30 shown in FIG. 1 (B) and FIG. The receiving hole 30 is opened at the center of the moving electrode 12, and its center line is coaxial with the axis of the moving electrode 12. A permanent magnet 31 is fixed to the back of the receiving hole 30, and the shaft portion 2 of the bolt 1 inserted into the receiving hole 30 is sucked to prevent the bolt 1 from falling off.

  The above-described welding apparatus is indicated by reference numeral 50. After the bolt 1 is inserted into the lower movable electrode 12 in FIG. 1A, the bolt 1 moves to the upper welding position by the rotation of the rotating shaft 10. After the steel plate part 13 is placed on the flange portion 3 of the bolt 1, the movable electrode 14 advances to pressurize the steel plate part 13, and a welding current is applied. Thereby, the welding projection 4 is welded to the steel plate part 13.

  Next, the component supply apparatus 100 assembled to the welding apparatus 50 will be described.

  The projection bolt 1 is fed from a parts feeder 32 to a predetermined location through a parts supply pipe 33 which is a supply passage member. A holding head 34 that holds the bolt 1 is arranged to face the end of the component supply pipe 33.

  As shown in FIG. 4, the holding head 34 is configured by a storage cup 35 that opens upward, and a storage hole 36 is provided in the storage cup 35. The bolt 1 is held in a state where the flange portion 3 is seated on the bottom portion of the accommodation hole 36, and the shaft portion 2 projects from the accommodation cup 34 in this state. Although not shown, it is desirable to embed a permanent magnet in the bottom of the receiving hole 36 and seat the flange 3 in the receiving hole 36 in a stable state.

  An air cylinder 38, which is an advancing / retreating drive means, is fixed to the support plate 39 so as to make an advancing / retreating stroke in the vertical direction of FIGS. 1 (A), 4 and 5A. The support plate 39 is fixed to the floor surface 5. The air cylinder 38 has two piston rods 40 that are advanced and retracted to provide good operational stability. A base plate 42 made of a thick plate is integrated with a coupling plate 41 to which the piston rod 40 is coupled by bolting or welding.

  A support plate 43 coupled to the base member 42 is stretched in an upright state, and a fixing plate 44 is integrated at its upper end with a bolt or the like in a substantially horizontal posture. The base member 42 is arranged in parallel to the base 7, the support plate 43 stands upright from the base member 42, and the fixed plate 44 is parallel to the base member 42. The component supply pipe 33 is attached to the fixed plate 44.

  In order to set the distance between the component supply pipe 33 and the rotary space 22 to an appropriate size, a separation adjusting means 45 for moving the support plate 43 in the left-right direction in FIG. 1A or FIG. 4 is provided. The specific structure of the separation adjusting means 45 only needs to be able to adjust the position of the support plate 43 in the horizontal direction of FIG. 4 with respect to the base member 42. For example, a combination of a long hole and a fixing bolt, It can be realized by a combination of a slide groove and a fixing bolt. Here, the former structure is adopted.

  5A is a view of FIG. 5B, and a long hole 46 extending in the left-right direction is provided in the lower part of the support plate 43, and the base member passes through the long hole 46. Two fixing bolts 47 to be screwed into 42 are arranged. Therefore, the fixing bolt 47 is loosened to shift the support plate 43 in the direction of the long hole, and then the fixing bolt 47 is tightened again to set the distance between the component supply pipe 33 and the rotating space 22 to an appropriate dimension.

  In order to make the holding head 34 take two positions, a receiving position for receiving the bolt 1 from the component supply pipe 33 and a supply position for supplying the bolt 1 to the moving electrode 12 waiting in the supplied position. A reciprocating drive means 49 for reciprocating between these two positions is provided. The reciprocating drive means 49 can be configured in various ways such as an electric motor or an air cylinder that performs forward / backward output. Here is the latter example. A bracket 48 is attached in a state of being raised from the base member 42, and an air cylinder 51 is fixed thereto.

  A spacer block 53 is fixed to the piston rod 52 of the air cylinder 51, and the holding head 34 is coupled to the spacer block 53. This connection is made by fixing an arm member 54 integrated with the holding head 34 to the spacer block 53 by bolting or the like.

  When the air cylinder 51 moves back and forth, the holding head 34 reciprocates between the receiving position that matches the component supply pipe 33 and the movable electrode 12 that is in a standby state at the supplied position. The air cylinder 51 advances and stops at a position where the shaft portion 2 is coaxial with the receiving hole 30 of the moving electrode 12. Thereafter, when the air cylinder 51, the holding head 34, and the like are raised all at once by the operation of the air cylinder 38, the shaft portion 2 is inserted into the receiving hole 30 and is attracted by the permanent magnet 31. Then, the air cylinder 38 returns and the air cylinder 51 returns.

  Although not shown, when the tip of the shaft portion 2 enters the receiving hole 30, compressed air is injected from the bottom of the receiving cup 35 to positively feed the shaft portion into the receiving hole 30. By doing so, a more reliable operation can be obtained.

  In this embodiment, in order to stabilize the reciprocating movement of the holding head 34, that is, to prevent the holding head 34 from moving downward due to the weight of the holding head 34, the spacer block 53 is a slide rail. Supporting structure is adopted.

  As shown in FIGS. 4 and 5A, the slide rail 55 is fixed on the base member 42 by bolting or the like in a state parallel to the forward / backward direction of the piston rod 52, that is, the forward / backward direction of the holding head 34. A slider 56 is attached so as to straddle the slide rail 55 so that it can advance and retreat along the slide rail 55. In order to make the forward / backward movement of the slider 56 smooth, a rolling ball 57 is inserted between the slider 56 and the slide rail 55 as shown in FIG. A spacer block 53 is fixed on the slider 56.

  With the above-described structure, the holding head 34 advances and retreats along the slide rail 55 by the operation of the air cylinder 51 while the load is supported by the slide rail 55. Therefore, the vertical position of the holding head 34 is always maintained at a constant position both at the receiving position that matches the component supply pipe 33 and at the supply position for the movable electrode 12 in the standby state. Delivery is performed accurately.

  As described above, the holding head 34 is disposed on the base member 42 via the arm member 54, the slider 56, and the slide rail 55. Therefore, the holding head 34 is disposed on the base member 42 that is moved by the air cylinder 38 that is a forward / backward drive means.

  The most advanced position of the air cylinder 51 as the reciprocating drive means is the supply position facing the moving electrode 12 at the supply position. Further, since the position of the component supply pipe 33 is moved by the adjustment of the separation adjusting means 45, the most retracted position of the air cylinder 51 is adjusted in order to correspond to the position. A mechanism that performs this adjustment function is the reciprocating distance adjustment means 59.

  The reciprocating distance adjusting means 59 can be realized by various methods such as a mechanism that adjusts the return position of the air cylinder 51 with a stopper mechanism and a mechanism that incorporates a return position adjusting mechanism in the air cylinder 51 itself. Here, the former method is adopted.

  That is, a stopper piece 60 is disposed at the end of the arm member 54 so as to face the bracket 48, and a stopper bolt 61 is screwed into the bracket 48 in a state parallel to the piston rod 52. This is a structure for receiving 60. Therefore, by adjusting the protruding length of the stopper bolt 61, the return position of the stopper piece 60, that is, the holding head 34 is selected. Reference numeral 62 denotes a lock nut.

  If the length of the movable electrode 12 is changed as will be described later, the vertical position of the holding head 34 also needs to be changed. For this purpose, an interval adjusting means 76 is provided. Various devices such as a mechanism that changes the relative position between the air cylinder 38 and the stationary member, and a device that uses an adjustable structure for the piston rod 40 of the air cylinder 38 can be used as the distance adjusting means 76. Here, the former mechanism is adopted.

  That is, as shown in FIG. 5, a vertical hole 77 is provided in the support plate 39 that is a stationary member, and two fixing bolts 78 that pass through the long hole 77 are screwed into the air cylinder 38. At the time of adjustment, the fixing bolt 78 is loosened, the vertical position of the air cylinder 38 is adjusted along the long hole 77, and then the fixing bolt 78 is tightened again.

  Normally, the bolt 1 is fed from the parts feeder 32 into the parts supply pipe 33 by compressed air, so that it enters the accommodation hole 36 of the holding head 34 at a high speed, and therefore the shape of the accommodation hole 36 is worn. There is a risk of deformation. In order to solve such a problem, the bolt 1 is temporarily stopped and then supplied into the holding head 34 at a low speed. That is the stop passage unit 63.

  As shown in FIGS. 4 and 5A, the stop passing unit 63 has the fixing plate 44 fixed by a bolt or the like on the open side of a U-shaped guide member 64 that opens downward, A closed cross-sectional structure having a rectangular cross section is formed. A space having this closed cross-sectional structure is a sliding space 65. Reference numeral 66 denotes a cover plate that seals the opening of the sliding space 65.

  An elongated opening / closing member 67 having a rectangular cross section is fitted in the sliding space 65 in a state where it can be advanced and retracted, and a solid stop portion 68 and a passage portion 69 having a hole are formed in the opening / closing member 67. And the connection board 70 is couple | bonded with the guide member 64 with the volt | bolt etc., and the connection board 71 is being fixed to the edge part in the state facing downward.

  An air cylinder 72 for advancing and retracting the opening / closing member 67 is fixed to the coupling plate 71, and the piston rod 73 is coupled to the opening / closing member 67. In this connection, the piston rod 73 is screwed into the end portion of the opening / closing member 67 and the lock nut is used to prevent loosening. The forward / backward direction of the piston rod 73 is the forward / backward direction of the opening / closing member 67.

  A part of the component supply pipe 33 is constituted by a metal passage pipe 74 through which the projection bolt 1 passes. The passage pipe 74 is made of a pipe member having a circular cross section, and opens to the sliding space 65 from the upper side, and opens to the lower side in a state of being coaxial therewith. A lower passage pipe 74 faces the holding head 34. Then, by adjusting the separation adjusting means 45, the position of the component supply pipe 33 in the left-right direction is changed, and the position of the lower passage pipe 74 is also changed.

  As shown in FIG. 4, the bolt 1 transferred at a high speed is temporarily stopped by the stop portion 68, and then the opening / closing member 67 is moved to the left by the air cylinder 72 and the passage portion 69 matches the passage pipe 74. The bolt 1 is slowly fed into the holding head 34 by its own weight.

  Operations of the above-described welding device 50 and component supply device 100 will be described.

  The holding head 34 shown by a solid line in FIG. 1A or FIG. 4 is in a state where the bolt 1 is supplied to the holding head 34. In this state, the air cylinder 51 operates, the holding head 34 advances along the slide rail 55, and stops at a position where the shaft portion 2 is coaxial with the receiving hole 30. Then, the air cylinder 38 is operated so that the shaft portion 2 is inserted into the receiving hole 30 and is attracted to the permanent magnet 31. Thereafter, the air cylinders 38 and 51 perform reverse operations, and the holding head 34 returns to the receiving position shown by the solid line.

  When the bolt 1 is supplied to the movable electrode 12 at the supply position as described above, the movable electrode 12 is rotated 180 degrees by the rack 17 and the pinion 16 at the same time. The electrode 12 moves to the supply position. A steel plate part 13 is placed on the flange portion 3 of the movable electrode 12 rotated upward, and the movable electrode 14 advances to apply pressure and welding current. During this energization, the contactor 24 is pressed against the cylindrical portion 23 by the operation of the air cylinder 25, and the welding current is energized.

  The bolt 1 is supplied from the holding head 34 in the above-described order to the movable electrode 12 at the supply position where the bolt 1 is not held.

  When the type of the steel plate part 13 is changed and the length of the bolt 1 is increased, the moving electrode 12 is also replaced with a longer one. Therefore, since the length from the rotation center of the rotating shaft 10 to the tip of the moving electrode is increased, the rotation space 22 is also increased. Therefore, in order to prevent the component supply pipe 33 from abnormally approaching the rotary space 22 or entering the rotary space 22, the separation adjusting means 45 is adjusted.

  After the adjustment of the distance adjusting means 45, the distance adjusting means 76 is adjusted so that the distance between the holding head 34 and the movable electrode 12 at the supply position is set to an appropriate value. That is, the shaft portion 2 is set to enter the receiving hole 30 over a predetermined length by the ascending operation of the air cylinder 38.

  Furthermore, since the position of the component supply pipe 33 is displaced to the right in FIGS. 1A and 4, the receiving position of the holding head 34 must also be shifted to the right. For this purpose, the protruding length of the stopper bolt 61 of the reciprocating distance adjusting means 59 is shortened.

  Further, when the short bolt 1 is welded, the moving electrode 12 is replaced with a shorter one, so that the rotation radius from the rotation center of the rotating shaft 10 to the moving electrode tip is reduced. In such a case, the adjustment operation opposite to that when the moving electrode 12 becomes longer is performed in each part.

  In the first embodiment, it is possible to use one moving electrode 12. In this case, the number of welded parts may be small. Further, in the above-described embodiment, various air cylinders are employed, but an electric motor that performs forward / backward output may be employed instead.

  The effects of the first embodiment are listed as follows.

  When the length of the projection bolt 1 held by the moving electrode 12 is changed, the length of the moving electrode 12 is also changed accordingly. When such a change is made, the rotation radius between the rotation center of the movable electrode 12 and the distal end portion of the movable electrode is increased or decreased, and the supplied position and the welding position of the movable electrode 12 are moved. When the rotation radius is increased, the arrangement location of the supply passage member such as the component supply pipe 33 should not enter the rotation space 22 of the moving electrode 12, and the position of the holding head 34 must be changed. I must. Conversely, when the turning radius becomes small, the position of the holding head 34 must be changed, and the location of the component supply pipe 33 must also be changed in accordance with the change in the position of the holding head 34.

  When the rotation radius becomes large, the component supply pipe 33 is adjusted so as not to enter the rotation space 22 of the moving electrode 12 by adjusting the separation adjusting mechanism 45. Along with this, the interval adjusting means 76 is adjusted to increase the interval from the rotation center to the holding head 34 so that the interval between the movable electrode 12 waiting at the supply position and the holding head 34 is optimized. To do. Further, the reciprocating distance of the reciprocating drive means 49 is adjusted by the reciprocating distance adjusting means 59 so that the holding head 12 at the receiving position matches the position of the component supply pipe 33.

  On the other hand, when the turning radius becomes small, the separation adjusting means 45 is adjusted so that the supply passage member such as the component supply pipe 33 is adjusted so as not to be too far from the rotation space 22 of the moving electrode 12, and reciprocating driving is performed. It is possible to prevent the reciprocating distance of the means 49 from becoming excessive and the space of the entire apparatus from becoming excessive. Accordingly, the distance adjustment unit 76 is adjusted to reduce the distance from the rotation center to the holding head 34 so that the distance between the movable electrode 12 waiting at the supply position and the holding head 34 is optimized. To do. Further, the reciprocating distance of the reciprocating drive means 49 is adjusted by the reciprocating distance adjusting means 59 so that the holding head 34 at the receiving position matches the position of the component supply pipe 33.

  In this way, by combining the adjustment of the separation adjusting means 45, the interval adjusting means 76, the reciprocating distance adjusting means 59, etc., the component supply device can be operated normally in response to the increase or decrease of the turning radius. It becomes possible.

  In particular, the welding apparatus 50 is coupled to at least the rotary shaft 10 and has a rotary base member 11 to which the moving electrode 12 is attached, and a rotary drive means 16 such as a rack and pinion mechanism for rotating the rotary shaft 10. 17 and 18 and a movable electrode 14 paired with the moving electrode 12, and the rotation angle of the rotation driving means is the object to which the bolt 1 from the component supply device is supplied to the receiving hole 30 of the moving electrode 12. In the supply position and the position where the bolt 1 is welded so that the bolt 1 can be welded to the steel plate part 13 by rotating from the supplied position, the distance adjusting means 45, the distance adjusting means 76 and the reciprocating distance adjusting means 59 are set. By combining adjustments such as these, normal component supply operation can be ensured, and the component supply device 100 is additionally mounted on the existing moving electrode rotating welding device 50. It is effective in the case of.

  The holding head 34 is disposed on a base member 42 that is moved by an air cylinder 38 that is the forward / backward drive means.

  Since the holding head 34 is arranged on the base member 42 that moves together with the air cylinder 38 in this way, the holding head 34 is displaced in accordance with the operation of the air cylinder 38 and stands by at the holding head 34 and the supplied position. The distance from the moving electrode 12 is set appropriately, and an accurate operation can be obtained.

  The reciprocating drive means 49 is of a type that moves the holding head 34 forward and backward.

  By such reciprocation of the holding head 34 in the linear direction, a highly reliable component supply device can be obtained.

  The reciprocating distance adjusting means 59 is a mechanism for adjusting the advancing / retreating length of the reciprocating driving means 49 for linearly moving the holding head 34 back and forth.

  The relative position between the receiving position of the holding head 34 and the component supply pipe 33 can be accurately set by using such a mechanism that adjusts the advance / retreat length of the reciprocating drive means 49.

  Further, the advancing / retreating drive means 38 is attached to the stationary member 39 via the interval adjusting means 76, the base member 42 is coupled to the advance / retreat driving means 38, and the reciprocating drive means 49 is provided integrally with the base member 42. The holding head 34 that holds the bolt 1 is configured to reciprocate between two positions, a receiving position that matches the component supply pipe 33 and a supply position that matches the moving electrode 12 at the supply position in the standby state. Further, a separation adjusting means 45 for adjusting the relative position between the component supply pipe 33 and the rotary space 22 is provided, and the holding head 34 is made to coincide with the position of the component supply pipe 33 which has changed as the separation adjustment means 45 is adjusted. A reciprocating distance adjusting means 59 is provided.

  With the configuration as described above, the entire component supply device 100 can be detached from the welding device 50 simply by detaching the advance / retreat driving means 38 from the stationary member 39, and handling is simplified and work efficiency is improved. It is effective for. Furthermore, since the entire component supply device 100 is formed as a unit having the advance / retreat driving means 38 as a basic member as described above, the relative positions of the members constituting each part can be accurately set, and the component supply device 100 Operation accuracy is improved.

  6 and 7 show a second embodiment.

  In this embodiment, the mounting position of the air cylinder 51 is opposite to that of the first embodiment. Therefore, when the holding head 34 matches the moving electrode 12 at the supply position, the air cylinder 51 is the most contracted stroke position, and when the holding head 34 is at the receiving position that matches the component supply pipe 33, the air cylinder 51 The advance position 51 is a position adjusted by the reciprocating distance adjusting means 59.

  As shown in FIG. 7, the slide rail 55 is disposed in parallel with the piston rod 52, and a coupling plate 80 that couples the slider 56 and the piston rod 52 is provided.

  In order to constitute the reciprocating distance adjusting means 59, a bracket 81 is fixed to the base member 42, and a stopper bolt 61 is screwed therein. When the coupling plate 80 is received by the stopper bolt 61, the holding head 34 stops at a position matching the component supply pipe 33. Further, as shown in FIG. 7, a damper 79 similar to the damper 29 is attached to the bracket 81. Since the configuration other than the above is the same as that of the previous embodiment, members having the same function are denoted by the same reference numerals.

  Since the arrangement of the air cylinder 51 is substantially below the welding apparatus 50 as described above, even if the air cylinder 51 becomes long, it does not protrude from the base 7 and is effective for compacting the entire apparatus. Is. Other functions and effects are the same as in the previous embodiment.

  8 to 10 show the third embodiment.

  This embodiment is a case where the reciprocating drive means 49 is a rotary type that makes an arc motion. The base member 42 is supported by the air cylinder 38 via the rotation driving means 82 and a plurality of coupling members. The plurality of coupling members are formed by an advancing / retreating plate 83 that is advanced and retracted by the air cylinder 38, a support plate 84 that is coupled to the advancing / retreating plate 83, and a fixed plate 85 that is coupled thereto.

  The fixing plate 85 is arranged in a substantially horizontal direction, and a stepping motor 86 as rotation driving means is fixed thereto, and the base member 42 is fixed to an output shaft 87 thereof. The output shaft 87 is supported by a cylindrical bearing unit 88, and the bearing unit 88 is coupled to the support plate 84 by a bracket 89.

  The base member 42 made of a thick plate is rotated in a horizontal plane by a stepping motor 86. Two arm members 54 are mounted on the base member 42 in a straight line. The two holding heads 34 have the same radius of rotation so as to move on a common arc, and are spaced 180 degrees apart. A reciprocating distance adjusting means 59 is formed on the arm member 54 and the base member 42. That is, the long hole 90 is provided in the arm member 54, and each of the two fixing bolts 91 penetrating therethrough is screwed into the base member 42. The fixing bolt 91 is loosened, the arm member 54 is moved along the long hole 90, and the fixing bolt 91 is tightened again to adjust the reciprocating distance of the holding head 34.

  In the third embodiment, the separation adjusting means 45 is disposed between the advance / retreat plate 83 and the support plate 43. The specific structure is the same as in the previous embodiments. Further, the base member 42 may be rotated 180 degrees by a rack and pinion mechanism instead of the stepping motor 86. Since other configurations are the same as those of the previous embodiments, members having the same function are denoted by the same reference numerals.

  When the stepping motor 86 rotates 180 degrees, the holding head 34 supplied with the bolt 1 at the receiving position moves to a position that matches the moving electrode 12 at the supplied position. At the same time, the moving electrode 12 at the supply position moves to the receiving position. When the shaft portion 2 of the bolt 1 is inserted into the receiving hole 30 of the moving electrode 12, it is performed by the operation of the air cylinder 38 as in the previous embodiments.

  The operational effects of the third embodiment are listed as follows.

  The reciprocating drive means 49 is of a type that moves the holding head 34 back and forth in the arc direction.

  By such reciprocation of the holding head 34 in the arc direction, a highly reliable component supply device can be obtained.

  The reciprocating distance adjusting means 59 is a mechanism for adjusting the arc moving radius of the reciprocating driving means 49 for moving the holding head 34 in an arc.

  Using such a mechanism for adjusting the arc moving radius of the reciprocating drive means 49, the relative position between the receiving position of the holding head 34 and the component supply pipe 33 can be set accurately.

  Further, since the base member 42 is rotated, the output shaft 87 of the stepping motor 86 can be arranged in the vertical direction, and accordingly, the entire component supply device 100 can be arranged in the vertical space. . Such space utilization is effective when there is a space restriction in the left-right direction. Other functions and effects are the same as those of the previous embodiments.

  FIG. 11 shows a fourth embodiment.

  In this embodiment, the reciprocating drive means 49 constituted by the air cylinder 51 shown in FIGS. 1 and 4 is constituted by a drive unit 102 that converts the rotational motion of the rotational output means 101 such as an electric motor into a linear motion. Is. FIG. 11 shows only the portions different from those in FIGS.

  11 (A) and 11 (B), a pinion 104 is attached to the output shaft 103 of the electric motor 101, and the pinion 104 is engaged with a rack 105. FIG. The drive unit 102 is a unit in which the holding head 34 and the like are integrated with the electric motor 101, and a guide rod 106 is slidably passed through a part of the drive unit 102. 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 bolt 1 is supplied from the component supply pipe 33 to the holding head 34, and then the drive unit 102 moves while self-propelled to the left, and the receiving hole 30 of the moving electrode 12 and the shaft portion 2 are coaxial. Self-running stops. Thereafter, the shaft portion 2 is inserted into the receiving hole 30 by the operation of the air cylinder 38. Therefore, the installation of the drive unit 102 is effective for simplifying the structure. Furthermore, control becomes easier by using an electric motor. Other functions and effects are the same as those of the previous embodiments.

  Further, in the example of FIG. 11C, the drive unit 102 does not advance and retract, and the rack 105 advances and retracts. 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 other functions and effects are the same as those of the previous embodiments.

  Although not shown, the above-described air cylinder 38 may be stopped, a driving unit for moving the holding head 34 up and down may be attached to the driving unit 102, and the shaft portion 2 may be inserted into the receiving hole 30.

  As described above, according to the present invention, it is possible to additionally attach a component supply apparatus with good unity and operation reliability to an existing rotary welding apparatus. Therefore, it can be used in a wide range of fields such as a car body welding process for automobiles and a sheet metal welding process for home appliances.

It is a front view of the whole apparatus. It is a top view of the whole apparatus. It is a side view of the whole apparatus. It is the front view which expanded partially. It is the side view which expanded partially. It is a front view which shows another Example. It is a partial top view of another Example. It is a front view which shows other Example. It is the front view which expanded partially. It is the side view which expanded partially. It is the front view and partial top view which show the other Example simply.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projection bolt 2 Shaft part 3 Flange part 4 Welding protrusion 10 Rotating shaft 11 Rotating base member 12 Moving electrode 13 Steel plate component 14 Movable electrode 16 Pinion 17 Rack 22 Rotating space 30 Receiving hole 33 Component supply pipe 34 Holding head 38 Air cylinder, Advancement / retraction drive means 42 Base member 45 Separation adjustment means 49 Reciprocation drive means 50 Welding device 59 Reciprocation distance adjustment means 76 Interval adjustment means 82 Rotation drive means 100 Component supply apparatus 101 Rotation output means 102 Drive unit

Claims (1)

The welding apparatus to which the component supply device is attached is paired with at least a rotating base member coupled to a rotating shaft and having a moving electrode attached thereto, a rotation driving means for rotating the rotating shaft, and the moving electrode. The rotation angle of the rotation drive means is determined by the supply position where the component from the component supply device is supplied to the holding portion of the moving electrode, and the component rotated from the supply position to the counterpart member. It is set to take a welding position that can be welded,
The component supply device includes a separation adjusting means for separating the component supply passage member from the rotational movement space of the moving electrode, a holding head for holding the component, and a receiving position for receiving the component from the supply passage member. And a supply position for supplying parts to the moving electrode, and a reciprocating drive means for reciprocating between the two positions, and a holding head is moved to the moving electrode side to a predetermined position and a vertical movement stroke is performed. An advancing / retreating drive means; a reciprocating distance adjusting means for adjusting a reciprocating distance between the receiving position and the supply position; and a spacing adjusting means for adjusting a distance between the holding head and the moving electrode .
The axis of the rotary shaft is different from the reciprocating direction line of the advancing / retreating operation by the reciprocating driving means and the direction line of the advancing / retreating stroke by the advancing / retreating driving means,
A support plate is coupled to the base member or the advance / retreat plate coupled to the advance / retreat driving means in an upright state, and the position of the support plate is adjusted with respect to the base member or the advance / retreat plate at the coupling position of the support plate. The separation adjusting means is arranged in a state where it is possible, and a fixing plate is integrated with the upper end of the support plate in a substantially horizontal posture, and the supply passage member for supplying components to the holding head is coupled to the fixing plate. A component supply device for a welding apparatus, characterized by comprising:

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