JP2017094348A - Welding wire feeder, torch connection, and torch side connection member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure suitable for improving the replacement workability of a torch connection in a welding wire feeder including the torch connection with which a conduit cable is connected.SOLUTION: A welding wire feeder includes: an outlet guide 400 which causes a welding wire W to pass toward a conduit cable 200; and a torch connection 500 into which the outlet guide 400 is inserted, the torch connection 500 connected with the conduit cable 200. The torch connection 500 includes: fixed side connection members (510, 520, 530) having a power feeding block 530, with which a power cable for power supply is connected, and attached to a frame 130; and torch side connection members (550, 540) having a power feeding fitting 540 detachably attached to the power feeding block 530 and connected with the conduit cable 200.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a welding wire feeder, a torch connection, and a torch side connecting member.

  In consumable electrode arc welding, a welding wire feeder is used to feed a welding wire to a welding torch (see, for example, Patent Document 1). Generally, the housing of the welding wire feeder is provided with a torch connection for connecting a conduit cable, and a welding torch is attached to the distal end of the conduit cable. In the welding wire feeding device disclosed in Patent Document 1, an outlet guide is disposed between a feeding roll provided inside the housing and a conduit cable. The outlet guide is inserted in the torch connection, and the movement of the outlet guide in the axial direction is restricted by a locking member interposed between the torch connection and the outlet guide. The torch connection is attached to the front panel of the housing of the welding wire feeder and is connected to a conduit cable.

  An example of a conventional torch connection is schematically shown in FIG. As shown in the figure, for example, the torch connection 950 includes a power supply block 953, a power supply fitting 954, and a torch connection portion 955. The torch connection part 955 is attached to the front panel 912 in the welding wire feeder. The distal end portion of the power supply fitting 954 is inserted into the base end portion of the torch connection portion 955, and the power supply fitting 954 is fixed to the torch connection portion 955 in this state. The power supply block 953 is attached to the outer peripheral surface of the power supply fitting 954, and the power supply fitting 954 is positioned in the axial direction by tightening the power supply fitting tightening screw of the power supply block 953. A power cable (not shown) for supplying power is connected to the power supply block 953. An outlet guide 940 for guiding the welding wire is inserted into the power supply fitting 954. The outlet guide 940 is restricted from moving in the axial direction by a locking member (not shown) interposed between the power supply fitting 954 and the outlet guide 940. The base end portion of the power supply fitting 954 is attached to the frame 913 of the welding wire feeder.

  Although a detailed illustration is omitted, the torch connection portion 955 is provided with a pair of torch switch pin connection ports into which a pair of torch switch pins provided at the proximal end portion of the conduit cable 920 are inserted. In addition, the torch connection portion 955 is provided with a gas supply port into which a gas connection fitting provided at the proximal end portion of the conduit cable 920 is inserted. In addition, a power feeding portion provided at the proximal end portion of the conduit cable 920 is inserted into the distal end portion of the power feeding fitting 954. The shapes and positions of torch switch pins, gas supply ports, and power supply fittings 954 provided in the torch connection portion 955 differ depending on the type of welding torch.

  Different types of torch connections 950 are employed depending on the specifications of the welding torch to be connected. Therefore, when changing the welding torch to be used, the torch connection 950 needs to be replaced. When the torch connection 950 of the conventional welding wire feeding device described above is replaced with another torch connection having different specifications, the feeding metal 954 is removed from the frame 913 of the welding wire feeding device, and then the feeding of the feeding block 953 is performed. The metal fitting tightening screw was loosened, the power supply metal fitting 954 was removed, and the torch connection portion 955 and the power supply metal fitting 954 were exchanged. In this case, the power supply block 953 is positioned only by the connected power cable and is in an unstable state. As described above, in the conventional torch connection, the exchange work is complicated and the workability is poor.

Japanese Patent No. 5618360

  The present invention has been conceived under such circumstances, and relates to a welding wire feeding device having a torch connection to which a conduit cable is connected, in order to improve the workability of replacing the torch connection. The main issue is to provide a suitable structure.

  In order to solve the above problems, the present invention employs the following technical means.

  The welding wire feeding device provided by the first aspect of the present invention includes a frame, a power supply block to which a power cable for power supply is connected, a fixed-side connection member attached to the frame, and a welding wire. And a torch side connection member having a power supply fitting detachably attached to the power supply block on one end side and a conduit cable connected to the other end side.

  In a preferred embodiment, the fixed-side connection member includes a base plate attached to the frame and a guide adapter through which the welding wire is inserted.

  In a preferred embodiment, a cylindrical outlet guide is provided between the feeding roll and the conduit cable and allows the welding wire to pass toward the conduit cable. The outlet guide includes the feeding guide. A roll side portion is inserted into the guide adapter, and a conduit cable side portion is inserted into the power supply bracket. The fixed side connection member has a stopper that prevents the outlet guide from moving in the axial direction. Is provided.

  In a preferred embodiment, the outlet guide has a groove portion provided on an outer peripheral surface between the guide adapter and the power supply fitting, and the stopper is fitted in the groove portion so that the outlet guide has an axial direction. And the stopper includes a locking position where the locking portion fits into the groove, and an axis of the outlet guide without the locking portion fitting into the groove. It is possible to move between a non-locking position that allows movement in the direction.

  The torch connection provided by the second aspect of the present invention includes a fixed side connecting member and a torch side connecting member that constitute the welding wire feeding device according to the first aspect of the present invention.

  The torch side connection member provided by the third aspect of the present invention is a member constituting the welding wire feeding device according to the first aspect of the present invention, and is a power supply fitting that is detachably attached to the power supply block. And a torch connecting portion connected to the power supply fitting and connected to the conduit cable.

  According to the present invention, when the specification of the welding torch connected to the welding wire feeding device is changed, the torch side connecting member is removed by removing the torch side connecting member to which the conduit cable is directly connected from the fixed side connecting member. Can be easily exchanged.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a schematic side view which shows an example of the connection structure of the welding wire feeding apparatus which concerns on this invention, and the conduit cable connected to this. It is a side view of a torch connection. FIG. 3 is a front view of the torch connection shown in FIG. 2. FIG. 3 is a perspective view of the torch connection shown in FIG. 2. It is a perspective view which shows a stopper. It is sectional drawing which follows VI-VI of FIG. It is sectional drawing which follows the VII-VII of FIG. It is the same figure as FIG. 2 which shows the state which removed the torch side connection member from the fixed side connection member. It is the side view which represented typically the schematic structure of the conventional torch connection.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic side view showing an example of a connection structure between a welding wire feeding device according to the present invention and a conduit cable connected thereto. The welding wire feeding device 100 of the present embodiment is for feeding a welding wire W toward a welding torch (not shown) via a conduit cable 200 in consumable electrode arc welding. The welding wire feeding device 100 includes a feeding roll 310 and a pressure roll 320 facing the feeding roll 310. The feed roll 310 is rotationally driven by a motor (not shown). A welding wire W is sandwiched between the feeding roll 310 and the pressure roll 320 in a predetermined pressure state, and the welding wire W is fed to the conduit cable 200 side (right side in the figure) by driving the motor. Be paid. The pressure roll 320 can be displaced by a holding member (not shown) by swinging between a wire feeding position that pressurizes the feeding roll 310 and a retracted position away from the feeding roll 310. Yes. By causing the pressure roll 320 to take the retracted position, the welding wire W can be easily replaced. The holding member of the pressure roll 320 is provided with a pressure adjusting mechanism (not shown). In consumable electrode type arc welding, the wire diameter of the welding wire W to be used can be variously changed according to welding conditions. When changing the wire diameter of the welding wire W, the pressure adjustment is performed by the pressure adjusting machine so that a predetermined pressurizing state corresponding to the wire diameter is obtained.

  As shown in FIGS. 2 to 4, the welding wire feeder 100 of the present embodiment includes a cylindrical outlet guide 400 and a torch connection 500 to which the conduit cable 200 is connected. The outlet guide 400 is inserted into the torch connection 500 and is disposed between the feed roll 310 and the conduit cable 200.

  In the present embodiment, the torch connection 500 includes a base plate 510, a guide adapter 520, a power supply block 530, a power supply fitting 540, a torch connection portion 550, and a stopper 560.

  The base plate 510 is fixed to the frame 130 inside the welding wire feeder 100 by, for example, screwing or the like, and plays a role of supporting other elements of the torch connection 500. Base plate 510 is formed by, for example, appropriately bending a metal plate.

  The guide adapter 520 is fixed to the base plate 510 by, for example, screwing. As shown in FIGS. 1 and 2, a portion of the outlet guide 400 on the feed roll 310 side is inserted into the guide adapter 520.

  The power supply block 530 receives power supplied from the welding power source to the welding torch, and is fixed to the base plate 510 by, for example, screwing. As shown in FIGS. 1 to 4, a power supply metal plate 570 is connected to the power supply block 530, and a power supply power cable (not shown) is connected to the metal plate 570. Electric power at the time of welding is supplied from the power cable to the power supply block 530 through the metal plate 570. A mounting hole 531 for mounting a power supply fitting 540 described later is formed in the power supply block 530. The power supply block 530 is also formed with a slit 532 that communicates with the mounting hole 531 in the vertical direction, and is configured such that the diameter dimension of the mounting hole 531 can be enlarged or reduced by a tightening screw 533.

  As shown in FIG. 1, the torch connection portion 550 is a portion to which the conduit cable 200 is connected, and is attached to the front panel 120 of the housing 110 in the welding wire feeder 100. A switch cord of a welding torch and a gas hose for supplying a shielding gas (both not shown) are connected to the torch connecting portion 550.

  As shown in FIG. 3, the torch connection portion 550 is provided with a pair of torch switch pin connection ports 551 and 552, a gas supply port 553, and a power supply port 554. The arrangement of the outlet guide 400, the torch switch pin connection ports 551 and 552, the gas supply port 553, and the power supply port 554, which are wire supply paths, corresponds to the conduit cable 200 to be connected. If they are different, their arrangement is also different.

  The power supply fitting 540 has a cylindrical shape, and is connected to the torch connection portion 550 while being inserted into the torch connection portion 550. The power supply fitting 540 is inserted into the attachment hole 531 of the power supply block 530 and is attached to the power supply block 530 by tightening the tightening screw 533 of the power supply block 530 in this inserted state. On the other hand, when the tightening screw 533 is loosened, the power supply fitting 540 can be removed from the power supply block 530.

  As shown in FIG. 2, the power supply fitting 540 is disposed at a position away from the guide adapter 520 in the axial direction of the outlet guide 400. The central axis of the power supply fitting 540 matches the central axis of the guide adapter 520. As shown in FIGS. 1 and 2, a portion of the outlet guide 400 on the conduit cable 200 side is inserted into the power supply fitting 540.

  The outlet guide 400 is for passing the welding wire W toward the conduit cable 200. The outer diameter of the outlet guide 400 is a dimension corresponding to the inner diameter of the guide adapter 520 into which the outlet guide 400 is inserted and the power supply fitting 540. The inner diameter of the outlet guide 400 is a dimension according to the wire diameter of the welding wire W to be used. Accordingly, a plurality of types of outlet guides 400 having different inner diameter dimensions are used.

  As described above, the outlet guide 400 is inserted into the guide adapter 520 at the feeding roll 310 side, and inserted into the power supply fitting 540 at the conduit cable 200 side. On the other hand, in the outlet guide 400, an intermediate portion between a portion inserted into the guide adapter 520 and a portion inserted into the power supply fitting 540 is exposed. A groove portion 410 is provided on the outer peripheral surface of the intermediate portion of the outlet guide 400. The groove portion 410 has a smaller outer diameter than other portions.

  The stopper 560 is for preventing the outlet guide 400 from moving in the axial direction. In the present embodiment, the stopper 560 is attached to the power supply block 530 adjacent to the power supply block 530. More specifically, as shown in FIG. 5, the stopper 560 includes a main plate portion 561, a locking portion 562, a bent portion 563, and a knob portion 564. The main plate portion 561 has a flat plate shape. As shown in FIG. 4, an appropriate position of the main plate portion 561 is rotatably attached to a surface of the power supply fitting 540 facing the guide adapter 520 by a screw 565. Accordingly, the stopper 560 can be rotated around the rotation axis O1 parallel to the axial direction of the outlet guide 400.

  The locking portion 562 is for preventing the outlet guide 400 from moving in the axial direction by fitting into the groove portion 410 of the outlet guide 400. In this embodiment, the latching | locking part 562 is comprised by the U-shaped notch. The stopper 560 rotates the stopper 560 around the rotation axis O <b> 1, so that the locking portion 562 fits into the groove portion 410 and the locking portion 562 does not fit into the groove portion 410. It is possible to move between the positions. 1 to 3, 6, and 7 illustrate the time when the locking portion 562 takes the locking position. In FIG. 4, the stopper 560 is represented by an imaginary line, and represents both when the locking portion 562 is in the locking position and when it is in the non-locking position.

  As shown in FIG. 4, the bent portion 563 is formed by bending so that a flat plate-like part protrudes toward the conduit cable 200 side. In the process in which the stopper 560 rotates from the non-locking position to the locking position, the bent portion 563 contacts the side surface of the power supply block 530, and the main plate portion 561 is elastically deformed. Then, as shown in FIG. 7, when the stopper 560 takes the locking position, the bent portion 563 enters the slit 532 of the power supply block 530. At this time, the rotation of the stopper 560 around the rotation axis O1 is restricted.

  The knob portion 564 is a portion that is bent from the main plate portion 561 and stands up. The knob portion 564 is for the operator to manually pick the stopper 560 when moving the stopper 560 between the locking position and the non-locking position. The stopper 560 having the above configuration is formed, for example, by bending or punching a metal plate.

  Next, the operation of this embodiment will be described.

  In the consumable electrode type arc welding, the specifications of the conduit cable 200 connected to the welding wire feeder 100 may be different if the type of welding torch used is different. In this case, when changing the welding torch to be used, the torch connection portion 550 (torch connection 500) to which the conduit cable 200 is directly connected in the welding wire feeder 100 also corresponds to the specifications of the conduit cable 200. It needs to be exchanged for something.

  In the present embodiment, the base plate 510, the guide adapter 520, and the power feeding block 530 are integrally fixed, and the base plate 510 is attached to the frame 130. The power supply fitting 540 is fixed to the torch connecting portion 550, and the power supply fitting 540 is detachably attached to the power supply block 530.

  According to such a configuration, when the specification of the conduit cable 200 connected to the welding wire feeder 100 is changed, the power supply fitting 540 and the torch connection portion 550 are exchanged. Here, as shown in FIG. 8, the torch connection part 550 can be easily replaced by removing the power supply fitting 540 from the power supply block 530 together with the torch connection part 550. In addition, since the power supply block 530 is fixed to the base plate 510, the power supply block 530 is stable, and the replacement work of the power supply fitting 540 and the torch connection portion 550 does not become complicated.

  Note that the base plate 510, the guide adapter 520, and the power supply block 530 correspond to the fixed-side connection member in the present invention, and the power supply metal fitting 540 and the torch connection portion 550 correspond to the torch-side connection member in the present invention.

  In the present embodiment, the base plate 510 and the guide adapter 520 constituting the fixed side connection member are attached to the frame 130, and the welding wire W is inserted into the guide adapter 520 fixed to the base plate 510. According to the fixed-side connecting member having such a configuration, it is possible to appropriately perform the attachment to the frame 130 and the guide function of the welding wire W.

  In the outlet guide 400, a part on the supply roll 310 side is inserted into the guide adapter 520, and a part on the conduit cable 200 side is inserted into the power supply fitting 540. The power supply block 530 (fixed side connecting member) is provided with a stopper 560 that prevents the outlet guide 400 from moving in the axial direction. According to the configuration in which the stopper 560 is provided in the power supply block 530 (fixed side connection member), unlike the case where the outlet guide is locked by the power supply metal fitting, the power supply metal fitting 540 and the torch connection portion 550 (torch side connection member) Since the outlet guide 400 remains attached to the fixed-side connection member at the time of replacement, the workability of replacing the power supply fitting 540 and the torch connection portion 550 (torch-side connection member) is excellent.

  The outlet guide 400 has a groove portion 410 provided on the outer peripheral surface between the guide adapter 520 and the power supply fitting 540. The stopper 560 has a locking part 562 that prevents the outlet guide 400 from moving in the axial direction by fitting into the groove part 410. The stopper 560 includes a locking position where the locking portion 562 fits into the groove portion 410 and a non-locking position where the locking portion 562 does not fit into the groove portion 410 and allows the outlet guide 400 to move in the axial direction. And can be moved between. According to such a configuration, the outlet guide 400 can be easily removed by switching the stopper 560 from the locking position to the non-locking position. Therefore, even when the outlet guide 400 is replaced, the replacement workability is excellent.

  The stopper 560 can be rotated around a rotation axis O 1 parallel to the axis of the outlet guide 400. According to such a configuration, switching between the locking position and the non-locking position of the stopper 560 can be performed by a simple operation of rotating the stopper 560.

  The stopper 560 has a lock mechanism (bending portion 563) that restricts the rotation around the rotation axis O1 when the locking position is taken. According to such a configuration, the state where the stopper 560 prevents the movement of the outlet guide 400 is prevented from being unfairly released. As a result, the outlet guide 400 moves to the feeding direction side of the welding wire W (the right side in FIG. 1), the space between the feeding roll 310 and the outlet guide 400 spreads, and the welding wire W buckles. Such inconveniences can be prevented.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, and all modifications within the scope of the matters described in the claims are all within the scope of the present invention. Is included.

DESCRIPTION OF SYMBOLS 100 Welding wire feeding apparatus 110 Housing 120 Front panel 130 Frame 200 Conduit cable 310 Feeding roll 320 Pressure roll 400 Outlet guide 410 Groove part 500 Torch connection 510 Base plate (fixed side connection member)
520 Guide adapter (fixed side connection member)
530 Power supply block (fixed side connection member)
531 Mounting hole 532 Slit 533 Tightening screw 540 Power supply bracket (torch side connecting member)
550 Torch connecting part (torch side connecting member)
551,552 Torch switch pin connection port 553 Gas supply port 554 Power supply port 560 Stopper 561 Main plate portion 562 Locking portion 563 Bending portion (lock mechanism)
564 Knob 565 Screw 570 Metal plate O1 Rotating shaft W Welding wire

Claims (6)

Frame,
A power supply block to which a power cable for power supply is connected, and a fixed-side connection member attached to the frame;
A welding wire feeding device comprising: a torch side connection member having a power supply fitting inserted into the power supply block so as to be detachably attached to one end side and a conduit cable connected to the other end side. .   The welding wire feeding device according to claim 1, wherein the fixed-side connecting member includes a base plate attached to the frame and a guide adapter through which the welding wire is inserted. A cylindrical outlet guide disposed between the feed roll and the conduit cable for passing the welding wire toward the conduit cable;
The outlet guide has a part on the feed roll side inserted in the guide adapter, and a part on the conduit cable side inserted in the power supply fitting.
The welding wire feeding device according to claim 2, wherein the fixed-side connection member is provided with a stopper that prevents the outlet guide from moving in the axial direction. The outlet guide has a groove provided on the outer peripheral surface between the guide adapter and the power supply fitting,
The stopper has a locking portion that prevents the outlet guide from moving in the axial direction by being fitted into the groove portion,
The stopper includes a locking position where the locking portion fits into the groove portion, a non-locking position where the locking portion does not fit into the groove portion and allows the outlet guide to move in the axial direction, The welding wire feeder according to claim 3, which is movable between the two.   A torch connection including the fixed side connecting member and the torch side connecting member according to claim 1. A member constituting the welding wire feeding device according to any one of claims 1 to 4,
A torch side connection member comprising: a power supply fitting that is detachably attached to the power supply block; and a torch connection portion that is connected to the power supply fitting and to which a conduit cable is connected.

Images