JPH11123566A - Electrode device for seam welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate working by decreasing weight to be handled at the time of the replacing working of a disc electrode. SOLUTION: In this device, conductive electrode shaft 15, circular electrode 20 and electrode shaft 19 are integrally arranged successively on the same axial line, and respective electrode shafts 15, 19 are freely turnably supported by a conductive housing 13. When the integration of the respective electrode shafts 15, 19 and the circular electrode 20 has been released, at least either of the respective electrode shafts 15, 19 is allowed to be movable in the shaft direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk electrode device for a seam welding machine.

[0002]

2. Description of the Related Art FIG. 14 is a sectional view of a conventional electrode device for a seam welding machine, and FIG. 15 is a side view. FIG. 14 and FIG.
In 5, the disk electrode 3 fixed to the electrode shaft 1 with bolts 2 is supported by the housing 5 via bearing bushes 4a, 4b. Further, the electrode shaft 1 has bearing caps 7a, 7b fixed to the housing with bolts 6.
Is held by

[0003] A welding current supplied from a welding transformer (not shown) is supplied from the housing 5 to the disk electrode 3 through the bearing bushes 4a and 4b and the electrode shaft 1. Here, the leading end of the trailing plate 9 supported by the entrance clamp 8 and the tail end of the preceding plate 11 supported by the exit clamp 10 are formed by the disc electrode 3 and the lower disc electrode 12. Welding occurs due to resistance heating due to the welding current passed between them.

[0004]

Since the conventional electrode device for a seam welding machine is constructed as described above, when replacing the disk electrode 3, the bolt 6 is loosened and the bearing caps 7a and 7b are removed. Then, the electrode shaft 1 and the disk electrode 3 are removed from the housing 5 in a state of being integrated. Further, the bolt 2 is loosened and the disk electrode 3 is removed. Therefore, the replacement operation involves handling a heavy object in which the electrode shaft 1 and the disk electrode 3 are integrated, and there has been a problem that a large amount of labor is required for the operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an electrode device for a seam welding machine capable of facilitating the work by reducing the weight handled during the work of replacing a disk electrode. The purpose is to provide.

[0006]

According to a first aspect of the present invention, there is provided an electrode device for a seam welding machine, wherein a first electrode shaft, a disk electrode, and a second electrode shaft having conductivity are sequentially arranged on a coaxial line. Integrated, each electrode shaft is rotatably supported by a conductive housing, and when the integration of each electrode shaft and the disk electrode is released, the disk electrode passes across the axis of each electrode shaft At least one of the electrode shafts is movable in the axial direction so that a possible gap is formed.

According to a second aspect of the present invention, there is provided an electrode device for a seam welding machine, wherein a first electrode shaft, a disk electrode and a second electrode shaft having conductivity and arranged on a coaxial line are arranged on a coaxial line and integrated. Each of the electrode shafts is rotatably supported by a conductive housing, and the axial movement of each of the electrode shafts is limited by a spacer locked to the housing. When the integration between each electrode shaft and the disk electrode is released, the second electrode shaft is moved in an axial direction opposite to the first electrode shaft so as to be detachable from the housing.

According to a third aspect of the present invention, there is provided an electrode apparatus for a seam welding machine, wherein a first electrode shaft, a disk electrode and a second electrode shaft having conductivity are sequentially arranged on a coaxial line and integrated.
A first electrode shaft rotatably supported by a conductive first housing; a second electrode shaft rotatably supported by a second housing having a lower conductivity than the first housing;
When the integration of each electrode shaft and the disk electrode is released, the second
The second housing is rotatably supported by the first housing such that the electrode shafts are separated from the first electrode shaft in the axial direction of each electrode shaft.

According to a fourth aspect of the present invention, there is provided an electrode device for a seam welding machine, wherein a first electrode shaft, a disk electrode and a second electrode shaft having conductivity are sequentially arranged on a coaxial line and integrated.
The first electrode shaft is rotatably supported by a conductive first housing, and the second electrode shaft is rotatably supported by a conductive second housing. The second electrode axis is separated from the first electrode axis in the axial direction of each electrode axis when the integration with the first electrode axis is released.
Are rotatably supported by the first housing via a mounting base made of an insulating member, and the respective housings are connected by a flexible conductor.

According to a fifth aspect of the present invention, there is provided an electrode device for a seam welding machine, wherein the movement in the axial direction is limited in a state where the first electrode shaft, the second electrode shaft and the disk electrode are integrated. It was done.

According to a sixth aspect of the present invention, there is provided an electrode device for a seam welder, wherein the electrode device is integrated with a bolt screwed from the second electrode shaft side to the first electrode shaft.

According to a seventh aspect of the invention, there is provided an electrode apparatus for a seam welding machine, wherein a second electrode shaft is movable in an axial direction, and a disc electrode is pushed through the second electrode shaft by a pressing means arranged in a housing. The first electrode shaft is pressed to be integrated.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a sectional view showing the configuration of the first embodiment, and FIG. 2 is a side view of FIG. In FIGS. 1 and 2, reference numeral 13 denotes a conductive housing, to which a welding current is supplied from a welding transformer (not shown). Reference numeral 14 denotes a bearing bush having conductivity, and one surface of the flange portion 14a is in contact with the housing 13. Reference numeral 15 denotes an electrode shaft which is rotatably supported by the bearing bush 14 and has a support portion 15a. The flange portion 15b is in contact with the other surface of the flange portion 14a of the bearing bush 14. Reference numeral 16 denotes a washer fixed to an end surface of the electrode shaft 15 with a bolt 17, and its peripheral edge is in contact with the housing 13 to limit the axial movement of the electrode shaft 15.

Reference numeral 18 denotes a conductive bearing bush having a flange portion 18a, which is supported by the housing 13 so as to be movable in the axial direction on the coaxial line of the electrode shaft 15. 19
Is an electrode shaft rotatably supported by the bearing bush 18 and having a support portion 19a opposed to the support portion 15a. The electrode shaft is arranged coaxially with the electrode shaft 15 so as to be movable in the axial direction. 20. 20
Is a disk electrode disposed coaxially with each of the electrode shafts 15, 19, and is supported by the support portions 15a, 19a of the electrode shafts 15, 19. Reference numeral 21 denotes a pin connecting between each of the electrode shafts 15, 19 and the disc electrode 20, and rotates each of the electrode shafts 15, 19 and the disc electrode 20 integrally.

Reference numeral 22 denotes a washer arranged on the end face of the electrode shaft 19, and its peripheral edge is in contact with the housing 13 to limit the axial movement of the electrode shaft 19. Reference numeral 23 denotes a bolt screwed to the electrode shaft 15 from the electrode shaft 19 side. The bolt 23 fixes the washer 22 and presses the disk electrode 20 against the electrode shaft 15 with the electrode shaft 19 to be integrated. Reference numeral 24 denotes a bearing cap fixed to the housing 13 by bolts 25, and the electrode shafts 15, 19 are rotatably supported by the housing 13 via bearing bushes 14, 18.

Next, the operation will be described. 1 and 2
, The welding current supplied from the welding transformer (not shown)
4, 18 and the disk electrode 20 through each electrode shaft 15, 19
Is energized. Then, electric current is supplied from the disk electrode 20 to the material to be welded (not shown), and welding is performed by resistance heating.

Next, the replacement operation of the disk electrode 20 will be described with reference to FIGS. First, the bolt 23 screwed to the electrode shaft 15 is removed, and the electrode shafts 15 and 19 and the disc electrode 20 are removed.
Release the integration with. Then, the electrode shaft 19 is connected to the electrode shaft 1.
By moving to the right side in FIG. 1 opposite to the side 5, a gap is formed between the electrode shafts 15 and 19 through which the disc electrode 20 can pass. Here, the electrode shaft 19 by the pin 21 and the disk electrode 20
Is disengaged. Next, the disk electrode 20 is moved rightward in FIG. 1 to remove it from the support 15a of the electrode shaft 15. Further, the disk electrode 20 is removed from the electrode shafts 15 and 19 by moving the disk electrode 20 downward in FIG. 1 so as to cross the axis of each of the electrode shafts 15 and 19. When a new disk electrode 20 is incorporated, the replacement operation can be completed by reversing the above procedure.

As described above, by moving the electrode shaft 19 supported by the housing 13 in the axial direction to form a gap through which the disc electrode 20 can pass, each electrode shaft 15,
Since the disk electrode 20 can be removed across the axis between 19, the replacement work of the disk electrode 20 can be performed quickly and easily.

In the first embodiment, the bolt 23 is configured to be screwed into the electrode shaft 15 from the electrode shaft 19 side. However, the washer 16 is screwed into the electrode shaft 19 from the electrode shaft 15 side. While fixing, each electrode shaft 15,
The same effect can be expected even if the electrode 19 and the disc electrode 20 are integrated.

Further, in the first embodiment, the case where the washer 16 is fixed to the electrode shaft 15 with the bolts 17 has been described, but the structure may be as shown in FIG. That is,
A screw portion 2 is provided at the end of the electrode shaft 25 opposite to the support portion 25a.
5b is provided, and the washer 16 is fixed by a nut 26 screwed into the screw portion 25b.

Embodiment 2 FIG. FIG. 4 is a cross-sectional view showing the configuration of the second embodiment, and FIG. 5 is a cross-sectional view taken along line VV of FIG.
4 and 5, 13 to 17, 20, 21, and 2
Reference numerals 3 and 24 are the same as those in the first embodiment. 2
Reference numeral 7 denotes a conductive bearing bush, which is supported by the housing 13 on the same axis as the electrode shaft 15. Reference numeral 28 denotes an electrode shaft which is rotatably supported by the bearing bush 27 and has a support portion 28a opposed to the support portion 15a. The electrode shaft is arranged coaxially with the electrode shaft 15 and can pass through the bearing bush 27 to the right in FIG. Is formed.

Reference numeral 29 denotes a detachable horseshoe-shaped spacer mounted on the electrode shaft 28, which restricts the axial movement of the electrode shaft 28. Reference numeral 30 denotes a washer arranged on the end face of the electrode shaft 28, and its peripheral edge is in contact with the bearing bush 27. The electrode shaft 28 is connected to the disk electrode 20 by a pin 21 and pressed by the disk electrode 20 by a bolt 23 screwed to the electrode shaft 15 to be integrated with the electrode shaft 15. A bearing cap 31 is fixed to the housing 13 by bolts (not shown), and fixes the electrode shaft 28 to the housing 13 via a bearing bush 27.

Next, the operation will be described. 4 and 5
In the same manner as in the first embodiment, the welding current supplied from the welding transformer (not shown) is supplied from the housing 13 to the bearing bushes 14, 37 and the electrode shafts 15, 28.
Through the disk electrode 20. Then, electric current is supplied from the disk electrode 20 to the material to be welded (not shown), and welding is performed by resistance heating.

Next, the replacement operation of the disk electrode 20 will be described with reference to FIGS. First, the spacers 29 are removed, the bolts 23 are removed, and the electrode shafts 15,
28 and the disk electrode 20 are released from integration. Then, the electrode shaft 28 is moved in the rightward axial direction in FIG. 4 to form a gap through which the disk electrode 20 can pass across the axis of each of the electrode shafts 15 and 28. Thereafter, the disk electrode 20 supported by the support portion 15a of the electrode shaft 15 is moved in the axial direction to be detached from the support portion 15a, and crosses the axis of each of the electrode shafts 15 and 28 to the lower side in FIG. Take out.

When a new disk electrode 20 is to be incorporated, the electrode shaft 28 is moved rightward in FIG. Then, the disk electrode 20 is supported by the support portion 15a of the electrode shaft 15. In this case, the electrode shaft 15 is passed through the bearing bush 27 from the right side in FIG.
The disk electrode 20 is mounted while confirming the support portion 15a. Thereafter, the electrode shaft 28 is mounted on the bearing bush 27 and each of the electrode shafts 15 and 28 and
And the spacer 29 is inserted, and the operation is completed.

As described above, the locked state of the housing 13 and the spacer 29, the unification of the electrode shafts 15, 28 and the disc electrode 20 are released, and the electrode shaft 28 supported by the housing 13 is To the disk electrode 2
By forming a gap through which 0 can pass, the disk electrode 20 can be removed across the axis between each of the electrode shafts 15 and 28, so that the work of replacing the disk electrode 20 can be easily performed. Further, by extracting the electrode shaft 28 from the bearing bush 27, the work can be performed while visually checking through the bearing bush 27 when the disk electrode 20 is mounted, so that the mounting can be performed quickly.

In the second embodiment, the description has been given of the case where the axial movement of the electrode shaft 28 is limited by the spacer 29. However, the electrode shafts 15, 28 and the disk electrode 20 are integrated by the bolt 23, and When the movement of the shaft 15 in the axial direction is restricted by the collar 15b and the washer 16, the spacer 29 is unnecessary. Further, if the bearing bush 27 is fixed to the housing 13 by bolts (not shown) or the like, the washer 30 is unnecessary.

In the second embodiment, a new disk electrode 2
When the electrode shaft 28 is incorporated, the electrode shaft 28 is moved rightward in FIG.
Has been described in which the disk electrode 20 is mounted while checking the support portion 15a of the electrode shaft 15 through the bearing bush 27 from the right side of the drawing, but the electrode shaft 28 is not pulled out, and each electrode is mounted as in the first embodiment. Forming a gap through which the disc electrode 20 can pass across the axis between the shafts 15 and 28;
The disk electrode 20 may be incorporated through a gap.

In the second embodiment, the bolt 23 is described as being screwed to the electrode shaft 15 from the electrode shaft 28 side. However, the washer 16 is screwed to the electrode shaft 28 from the electrode shaft 15 side. While fixing, each electrode shaft 15,
The same effect can be expected even if the electrode 28 and the disk electrode 20 are integrated.

Embodiment 3 FIG. 6 is a sectional view showing the structure of the third embodiment, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 6 and 7, 13 to 17, 20, 21,
23 and 24 are the same as those in the first embodiment.
Reference numeral 32 denotes a conductive bearing bush, which is supported by the housing 13 so that the flange 32a contacts the housing 13 on the coaxial line of the electrode shaft 15. Reference numeral 33 denotes an electrode shaft rotatably supported by the bearing bush 32 and having a support portion 33a opposed to the support portion 15a. The electrode shaft 33 is arranged coaxially with the electrode shaft 15 and moves inside the bearing bush 32 to the right in FIG. Can pass.

Numeral 34 denotes a detachable horseshoe-shaped spacer mounted on the electrode shaft 33, which abuts against the flange 32a of the bearing bush 32 and restricts the axial movement of the electrode shaft 33. The electrode shaft 33 is connected to the disk electrode 2 by the pin 21.
0, and is pressed by the disk electrode 20 with a bolt 23 screwed to the electrode shaft 15 to be integrated with the electrode shaft 15. Reference numeral 35 denotes a holder fixed to the housing 13 by bolts 36. The holder 35 holds the spacer 34 and limits the axial movement of the electrode shafts 15, 33 and the disc electrode 20 integrated with each other.

Next, the operation will be described. 6 and 7
In the same manner as in the first embodiment, the welding current supplied from the welding transformer (not shown) is supplied from the housing 13 to the bearing bushes 14, 32 and the electrode shafts 15, 33.
Through the disk electrode 20. Then, electric current is supplied from the disk electrode 20 to the material to be welded (not shown), and welding is performed by resistance heating.

Next, the replacement operation of the disk electrode 20 will be described with reference to FIGS. First, the spacers 34 are removed, the bolts 23 are removed, and the electrode shafts 15,
The integration between the disk electrode 33 and the disk electrode 20 is released. Then, the electrode shaft 33 is moved in the axial direction on the right side in FIG. 6 to form a gap through which the disk electrode 20 can pass across the axis of each of the electrode shafts 15 and 33. After that, the disk electrode 20 supported by the support portion 15a of the electrode shaft 15 is moved in the axial direction and detached from the support portion 15a, and crosses the axis of each of the electrode shafts 15 and 33 to the lower side in FIG. Take out.

When a new disk electrode 20 is to be incorporated, the electrode shaft 33 is moved to the right in FIG. Then, the disk electrode 20 is supported by the support portion 15a of the electrode shaft 15. In this case, the electrode shaft 15 is passed through the bearing bush 32 from the right side in FIG.
The disk electrode 20 is mounted while confirming the support portion 15a. Thereafter, the electrode shaft 33 is mounted on the bearing bush 32, and each of the electrode shafts 15, 33 and
And the spacer 34 is inserted.

As described above, replacement of the disk electrode 20 can be easily performed as in the second embodiment. Also,
Since the work can be performed while visually checking, the disk electrode 20 can be quickly mounted.

In the third embodiment, as in the first embodiment, the disk electrode 2 is moved across the axis between the electrode shafts 15 and 28.
A gap through which 0 can pass may be formed, and the disc electrode 20 may be incorporated from the gap.

In the third embodiment, the bolt 23 is described as being screwed to the electrode shaft 15 from the electrode shaft 33 side. However, the bolt 23 is screwed to the electrode shaft 33 from the electrode shaft 15 side to attach the washer 16. While fixing, each electrode shaft 15,
The same effect can be expected by integrating the disk electrode 20 with the disk electrode 33.

Embodiment 4 FIG. FIG. 8 is a sectional view showing the configuration of the fourth embodiment, and FIG. 9 is a side view of FIG. 8 and 9, 14 to 17, 19 to 21, and 23 to 25 are the same as those in the first embodiment. Reference numeral 36 denotes a conductive housing which rotatably supports the electrode shaft 15 via the bearing bush 14. The electrode shaft 1
5 is a bearing bush 14 abutting on the housing 36
The axial movement is restricted by the flange portion 14a and the periphery of the washer 16 fixed to the electrode shaft 15 by the bolt 17.

Reference numeral 37 denotes a bearing bush that rotatably supports the electrode shaft 19, and a flange 37a is in contact with a housing 38 described later. 38 is a bearing bush 37
The electrode shaft 19 is rotatably supported via the
The electrode shaft 19 is rotatably supported by a shaft 39 in a direction away from the electrode shaft 15 in the axial direction of each of the electrode shafts 15, 19. Reference numeral 40 denotes a washer whose peripheral edge is in contact with a flange 37 a of the bearing bush 37, and is fixed to the electrode shaft 19 by a flathead screw 41. The electrode shafts 15 and 19 and the disk electrode 20 are integrated by a bolt 23 screwed to the electrode shaft 15 from the electrode shaft 19 side.

Next, the operation will be described. 8 and 9
In the same manner as in the first embodiment, the welding current supplied from the welding transformer (not shown) is applied to the path from the housing 36 to the disk electrode 20 through the electrode shaft 15 and from the housing 36 and the housing 38 to the electrode shaft. There is a path to the disk electrode 20 through the path 19. However, the housing 38
Is less conductive than the housing 36, most of the welding current is supplied from the housing 36 in a path through the electrode shaft 15. Thereby, the current passing through the shaft 39 can be suppressed. The welding current supplied to the disk electrode 20 is passed between the materials to be welded (not shown), and welding is performed by resistance heating.

Next, the replacement operation of the disk electrode 20 will be described with reference to FIGS. First, the bolt 23 screwed to the electrode shaft 15 is removed, and the electrode shafts 15 and 19 and the disk electrode 2 are removed.
Cancels integration with 0. Then, the electrode shaft 19 is moved rightward in FIG. 8 opposite to the electrode shaft 15 side, and the engagement with the collar portion 19 a of the electrode shaft 19 fitted to the disk electrode 20 and the pin 21 is released. Thereafter, the housing 38 is rotated counterclockwise about the shaft 39 to form a gap through which the disk electrode 20 can pass across the axis of each of the electrode shafts 15 and 19. When a new disk electrode 20 is incorporated, the replacement operation can be completed by performing the above procedure in reverse.

As described above, after the bolt 23 is removed, the integration of the electrode shafts 15 and 19 with the disk electrode 20 is released.
By moving the electrode shaft 19 in a direction opposite to the electrode shaft 15 and rotating the housing 38 supporting the electrode shaft 19 about the shaft 39, a gap through which the disc electrode 20 can pass can be formed. Therefore, the replacement work of the disk electrode 20 can be performed quickly and easily.

In the fourth embodiment, after the bolt 23 is removed, the electrode shaft 19 is moved rightward in the drawing, so that the flange portion 19a
The case where the housing 38 is rotated about the shaft 39 after the engagement between the and the pin 21 is released has been described. But,
By adopting a structure in which the flange 19 a and the pin 21 between the electrode shaft 19 and the disk electrode 20 are removed, the electrode shaft 19
Without moving the electrode shaft 19 to the axis 39
Can be turned around. Accordingly, a gap through which the disk electrode 20 can pass can be formed, and thus the replacement operation of the disk electrode 20 can be performed quickly and easily.

In the fourth embodiment, each housing 3
By connecting the flexible conductors 6 and 38 with the flexible conductor, the current flowing through the shaft 39 is reduced, so that heat generation due to electric resistance between the housings 36 and 38 and the shaft 39 can be suppressed.

In the fourth embodiment, the case where the housing 38 has lower conductivity than the housing 36 has been described. In this case, since the housing 38 is formed of an insulating member, there is no current flowing through the shaft 39, and thus heat generation due to electric resistance between the housings 36, 38 and the shaft 39 can be prevented.

In the fourth embodiment, the bolt 23 is described as being screwed into the electrode shaft 15 from the electrode shaft 19 side. However, the washer 16 is screwed into the electrode shaft 19 from the electrode shaft 15 side. While fixing, each electrode shaft 15,
The same effect can be expected even if the electrode 19 and the disc electrode 20 are integrated.

Embodiment 5 FIG. 10 is a sectional view showing the configuration of the fifth embodiment, and FIG. 11 is a side view of FIG. FIG.
11 and 14 to 17, 19 to 21, and 23 in FIG.
25 to 25 are the same as those in the first embodiment.
7, 40 and 41 are the same as those of the fourth embodiment. Reference numeral 42 denotes a conductive housing which rotatably supports the electrode shaft 15 via the bearing bush 14. Reference numeral 43 denotes a mounting base made of an insulating member.
Are fixed to the boss by bolts 44. Reference numeral 45 denotes a conductive housing that rotatably supports the electrode shaft 19 via a bearing bush 37.
It is supported by a mounting base 43 via a shaft 46 so as to be rotatable in a direction away from the electrode shaft 15 in the axial direction of 19. 4
Reference numeral 7 denotes a flexible conductor connecting between the housings 42 and 45.
It is fixed to each housing 42, 45 by a bolt 48.

Next, the operation will be described. 10 and 11, similarly to the first embodiment, the welding current supplied from the welding transformer (not shown) includes a path from the housing 42 through the electrode shaft 15 to the disk electrode 20 and a path from the housing 42. There is a path to the disk electrode 20 through the flexible conductor 47, the housing 45, and the electrode shaft 19. Then, the welding current supplied to the disk electrode 20 is conducted between the workpieces (not shown), and welding is performed by resistance heating.

Subsequently, the replacement work of the disk electrode 20 is shown in FIG.
FIG. 11 will be described. The procedure of the replacement work is the same as in the fourth embodiment. That is, the bolt 23 is removed, the electrode shaft 19 is moved rightward in the drawing of FIG. 10, and the housing 45 is rotated counterclockwise about the shaft 46, so that the disc electrode 20 A gap is formed that can pass across the axis. When a new disk electrode 20 is incorporated, the replacement operation can be completed by performing the above procedure in reverse.

In the fifth embodiment, the housing 45 is attached to the housing 42 via the mounting base 43 of the insulating member, and the housings 42 and 45 are connected by the flexible conductor 47 to prevent the current flowing through the shaft 46. Heat generation due to electric resistance between the housings 42 and 45 and the shaft 46 can be prevented.

In the fifth embodiment, the bolt 23 is described as being screwed to the electrode shaft 15 from the electrode shaft 19 side. However, the bolt 23 is screwed to the electrode shaft 19 from the electrode shaft 15 side to attach the washer 16. While fixing, each electrode shaft 15,
The same effect can be expected even if the electrode 19 and the disc electrode 20 are integrated.

Embodiment 6 FIG. FIG. 12 is a sectional view showing the configuration of the sixth embodiment, and FIG. 13 is a side view of FIG. FIG.
2 and FIG. 13, 13 to 18, 20, 24, 25
Is similar to that of the first embodiment. A bracket 49 is fixed to the housing 13 with bolts 50. Reference numeral 51 denotes an electrode shaft rotatably supported by the bearing bush 18 and having a support portion 51a on one end side facing the support portion 15a. The electrode shaft 51 is arranged coaxially with the electrode shaft 15 so that the collar portion 51b contacts the disk electrode 20. It has a concave portion 51c on the other end side while being in contact with it. Further, the electrode shaft 51 is movable in the axial direction.

Reference numeral 52 denotes a metal receiver arranged in the concave portion 51c of the electrode shaft 51, reference numeral 53 denotes a bearing disposed between the electrode shaft 51 and the metal receiver 52, and reference numeral 54 denotes a washer fixed to the electrode shaft 51 by a bolt 55. , Receiving money 52. Reference numeral 56 denotes a pressing means comprising a cylinder and a piston. The pressing shaft 56a presses the electrode shaft 51 against the disk electrode 20 via the metal holder 52, and the electrode shafts 15, 51 and the disk electrode 20 are integrated. The pressing means 56 may be a mechanism that pushes out the ball screw by a motor, a mechanism that pushes the ball screw with a lever, or the like.

Next, the operation will be described. In FIGS. 12 and 13, the welding current supplied from the welding transformer (not shown) is applied to the disk electrode 20 from the housing 13 through each of the electrode shafts 15 and 51 as in the first embodiment. Then, electric current is supplied from the disk electrode 20 to the material to be welded (not shown), and welding is performed by resistance heating.

Subsequently, the replacement work of the disk electrode 20 is shown in FIG.
FIG. 13 will be described. First, the pressing means 56 is operated to release the integration between the electrode shafts 15 and 51 and the disk electrode 20. Then, the electrode shaft 51 is moved rightward in the drawing of FIG.
A gap is formed between the two to allow the disc electrode 20 to pass through. Here, the engagement between the electrode shaft 51 and the disk electrode 20 by the pin 21 is released. Next, the disk electrode 20 is moved rightward in FIG. 12 to remove it from the support 15a of the electrode shaft 15. Further, the disk electrode 20 is taken out by moving the disk electrode 20 downward in the drawing of FIG. 12 so as to cross the axis of each of the electrode shafts 15 and 51. When a new disk electrode 20 is incorporated, the replacement operation can be completed by performing the above procedure in reverse.

As described above, the electrode shaft 51 is moved in the axial direction to form a gap through which the disk electrode 20 can pass, and the electrode shafts 15 and 51 and the disk electrode 20 are pressed by the pressing means 5.
6, the replacement work of the disk electrode 20 can be performed quickly and easily.

In the first to sixth embodiments, the electrode shaft 1
5 and the electrode shafts 19, 28, 33, 51 and the disc electrode 20 are released from integration, the electrode shafts 19, 28, 33,
The configuration in which the electrode shaft 51 is movable in the axial direction has been described.
A similar effect can be expected by using a configuration in which at least one of the electrodes 5 and the electrode shafts 19, 28, 33, 51 is movable so that at least one of them is movable.

[0058]

According to the first aspect of the present invention, when the integration of each electrode shaft and the disk electrode is released, at least one electrode shaft supported by the housing is moved in the axial direction,
By forming a gap through which the disk electrode can pass, the disk electrode can be removed across the axis between the electrode axes, so that the replacement of the disk electrode can be performed quickly and easily.

According to the second aspect of the present invention, the locking state between the housing and the spacer, the integration of each electrode shaft with the disk electrode is released, and the second electrode shaft is detached from the housing, whereby The disk electrode can be removed across the axis between the electrode axes, and the second
The work can be performed while visually checking from the side of the housing where the electrode shaft is supported, so that the replacement work can be performed quickly.

According to the third aspect of the present invention, when the integration of each electrode shaft and the disk electrode is released, the second housing is rotated to form a gap through which the disk electrode 20 can pass. Therefore, the replacement work of the disk electrode 20 can be performed quickly and easily.

According to the fourth aspect of the present invention, the second housing is rotatably supported by the first housing via the mount made of an insulating member, and the integration of each electrode shaft with the disk electrode is released. Then, by rotating the second housing, a gap through which the disk electrode 20 can pass can be formed, so that the replacement operation of the disk electrode 20 can be performed quickly and easily.

According to the fifth aspect of the present invention, the axial movement is restricted in a state where the first electrode shaft, the second electrode shaft and the disk electrode are integrated with each other. Can be guided.

According to the sixth aspect of the present invention, the disc electrodes are easily replaced by being integrated with the bolts screwed from the second electrode shaft side to the first electrode shaft. Can be.

According to the seventh aspect of the present invention, when the integration between each electrode shaft and the disk electrode is released, the second electrode shaft is moved in the axial direction to form a gap through which the disk electrode can pass. At the same time, by integrating each electrode shaft and the disc electrode by the pressing means, the replacement work of the disc electrode can be performed quickly and easily.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a first embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a sectional view showing another configuration of the first embodiment of the present invention.

FIG. 4 is a sectional view showing a configuration of a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a sectional view showing a configuration of a third embodiment of the present invention.

FIG. 7 is a sectional view taken along line VII-VII in FIG. 6;

FIG. 8 is a sectional view showing a configuration of a fourth embodiment of the present invention.

FIG. 9 is a side view of FIG.

FIG. 10 is a sectional view showing a configuration of a fifth embodiment of the present invention.

FIG. 11 is a side view of FIG.

FIG. 12 is a sectional view showing a configuration of a sixth embodiment of the present invention.

FIG. 13 is a side view of FIG.

FIG. 14 is a sectional view of a conventional electrode device for a seam welding machine.

FIG. 15 is a side view of FIG.

[Explanation of symbols]

13, 36, 38, 42, 45 Housing, 15, 1
9, 28, 33, 51 electrode shaft, 20 disk electrode, 23
Bolt, 29, 34 Spacer, 43 Mounting base, 47
Flexible conductor, 56 pressing means.

Claims (7)

[Claims] 1. A conductive first electrode shaft, a disk electrode, and a second electrode shaft are sequentially arranged on a coaxial line to be integrated, and each electrode shaft is rotatable by a conductive housing. The electrode shafts are supported such that when the integration between the electrode shafts and the disc electrodes is released, a gap is formed through which the disc electrodes can pass across the axis of the electrode shafts. Characterized in that at least one of the electrodes is movable in the axial direction. 2. A conductive first electrode shaft, a disk electrode and a second electrode shaft are arranged and integrated on a coaxial line,
Each of the electrode shafts is rotatably supported by a conductive housing, and the movement of each of the electrode shafts in the axial direction is restricted by spacers locked to the housing. In the stopped state, and when the integration of each of the electrode shafts and the disk electrode is released, the second electrode shaft can be displaced from the housing by moving in the axial direction opposite to the first electrode shaft. An electrode device for a seam welding machine, characterized in that: 3. A first housing having a conductive first electrode shaft, a disc electrode, and a second electrode shaft, which are sequentially arranged on a coaxial line and integrated, and wherein the first electrode shaft has a conductive property. And the second electrode shaft is rotatably supported by the first electrode shaft.
The second electrode shaft is rotatably supported by a second housing having a lower conductivity than that of the first electrode shaft, and when the integration of each of the electrode shafts with the disk electrode is released, the second electrode shaft is aligned with the axis of each of the electrode shafts. In a direction away from the first electrode axis,
An electrode device for a seam welding machine, wherein the second housing is rotatably supported by the first housing. 4. A first housing having a conductive first electrode shaft, a disc electrode, and a second electrode shaft, which are sequentially arranged on a coaxial line and integrated, and wherein the first electrode shaft has a conductive property. The second electrode shaft is rotatably supported by a conductive second housing, and when the integration of each electrode shaft and the disc electrode is released, The second housing pivots on the first housing via a mount made of an insulating member so that the second electrode shaft is separated from the first electrode shaft in the axial direction of each of the electrode shafts. An electrode device for a seam welder, wherein the electrode device is freely supported and the respective housings are connected by a flexible conductor. 5. The apparatus according to claim 1, wherein the first electrode axis, the second electrode axis, and the disk electrode are integrated and the axial movement is restricted. The electrode device for a seam welder according to any one of the above. 6. The device according to claim 1, wherein the first electrode shaft and the second electrode shaft are integrated by a bolt screwed to the first electrode shaft. Electrode device for seam welding machine. 7. A disk electrode is pressed against said first electrode shaft via said second electrode shaft by a pressing means arranged in a housing so that said second electrode shaft is movable in the axial direction, and is integrated. The electrode device for a seam welding machine according to claim 1, wherein the electrode device is used.