JPS6019823Y2 - Butt welding machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a butt welding machine for welding wire, and in particular, the current-carrying arm on the fixed side and the movable side respectively hold the wire ends, and the current-carrying arm on the moving side moves to the fixed side. In a device that performs butt bonding while pressing the bonding surfaces together, the wire clamping lever is configured to be easily operated.

In automatic or semi-automatic welding, long lengths of welding wire are utilized, and the wire is typically wound onto a spool or the like to form a wire reel.

When the wire in use begins to run out, its trailing end (terminal) is joined to the starting end of a newly supplied wire, and butt welding is generally used as the joining means.

A butt welding device is attached to an automatic or semi-automatic welding device, or is configured as a portable stand-alone device, but generally, the terminal and starting end of the wire are individually held between two current-carrying arm members, and the two current-carrying arm members A configuration is adopted in which the end surfaces of the wires are brought into pressure contact with each other by moving one or both of them in opposing directions.

By energizing both current-carrying arms, the wire ends are sufficiently heated and melted using Joule heat due to the contact resistance of the end faces and the resistance of the wire, and at the same time, the two are joined by the pressure welding force of the current-carrying arms. be.

Note that when the end and starting end of the wire are held between the current-carrying arms, the welding conditions determined depending on the type and shape of the wire are taken into consideration, and the length of the wire protruding from the current-carrying arms is determined before energization is applied.

Furthermore, these butt welds are sometimes performed when joining the starting end of a newly supplied wire to the end of a wire that is currently being fed, and therefore a device that can quickly and easily perform the joining is required.

In addition, as mentioned above, it is relatively small enough to be attached to a welding device or hung on a wall, and is easy to handle.Moreover, the end and starting end of the wire can be attached and removed after welding. In particular, it is strongly desired that it be simple.

1 to 3 are a plan view, a side view, and a plan view for explaining the operation of a typical example of a butt welding device previously developed by the present applicant. Arm 1 (
It is composed of a fixed side 1 (hereinafter simply referred to as a fixed side 1) and a movable current-carrying arm 2 (hereinafter simply referred to as a movable side 2), and the fixed side 1 is fixedly installed on a base plate 3.

One end of the movable side 2 is electrically insulated and pivotally supported by a pivot 4 provided on the fixed side 1, and is always urged by a tension spring 5 so as to be drawn toward the fixed side 1.

The biasing force is regulated by a contact cam 6 that is pivotally supported on the top surface of the fixed side 1 and a pulley 9 provided on a bracket 8 fixed to a part of the movable side 2.

That is, by rotating the abutting cam 6, the distance between the fixed side 1 and the movable side 2 can be maintained, and when a gap is created between the abutting surfaces of the cam 6 and the pulley 9, the movable side 2 becomes the fixed side. This means that it is biased to 1.

Further, on the tip sides (left side in the drawing) of the fixed side 1 and the movable side 2, gripping side parts 1a and 2a formed with narrow widths are integrally formed, and the top surface side of the root part forming the gripping side parts is integrally formed. forms a pivot 14.14.

And each clamp lever 15°1 is attached to the pivot portion 14.
6 are individually pivoted, and the clamp levers 15,
16 are configured such that their tips are brought into pressure contact with the gripping bases 13 provided on the fixed side 1 and the movable side 2 by the elastic force of a coil spring 17 disposed under slight compression between them.

The wires W to be butt welded are placed on the gripping table 13 with one end or the starting end, respectively,
The clamp levers 15 and 16 are clamped by abutting members provided at their distal ends, and are held under pressure by the elastic reaction force of the coil spring 17.

Therefore, the wire can be clamped by these clamp devices,
Alternatively, when removing the welding wire, the coil spring disposed sides of the clamp levers 15 and 16 are pushed down by hand against the elastic force of the coil spring 17.

By the way, gripping the wire in such butt welding is
Since the gripping portion is configured as a current-carrying portion, it is necessary to clamp it with strong pressure, and therefore, a considerably strong coil spring 17 is used.

Therefore, when attaching or detaching the wire, it is necessary to forcefully press down one side and both sides of the clamp lever at the same time.

Further, as shown in the figure, these clamp levers 15 and 16 are narrow and are often provided in a clamping portion, making their operation considerably difficult.

The present invention has been made with attention to these points, and aims to provide a butt welding machine in which the operation of the clamp levers is easy and the individual clamp levers can be operated separately and simultaneously according to the work order. be.

However, with this invention, cams are provided on the clamping operation side of the clamp lever, and these cams are fixed to one operating rotation shaft, and by the rotation of the rotation shaft,
One or both of the clamp levers are simultaneously held in the wire clamping state or in the open state against the reaction force of the resilient member.

The present invention will be explained in detail below based on the drawings. The figures show a specific configuration example in which the present invention is applied to the butt welding machine illustrated in Figs. 1 to 3. The present invention is not limited to the illustrated example, but may be implemented in the same manner even if the shapes of the component parts are changed or some of the designs are changed, keeping in mind the spirit of the above and later descriptions.

Furthermore, the embodiments described in the claims for utility model registration do not limit the configuration of the present invention.

Figure 4 is a side view showing a part of the butt welding machine of the present invention.
This is a partial diagram.

Figure 5 is a plan view of Figure 4, Figure 6 is a front view of Figure 4 seen from the direction of arrow A, Figures 7 and 8 are along the cutting lines ■-■ and ■-■ of Figure 6. 9 is an explanatory diagram of the operation in FIG. 6, FIGS. 10 to 13 are explanatory diagrams of the operation in FIGS. 7 and 8, and FIG.
3 is an explanatory view of the front end side of the clamp lever, and FIGS. 15 to 17 are structural explanatory views showing other embodiments of the present invention.

In these figures, in the butt welding machine of the present invention, the cams 22 and 23 that operate the clamp levers 15 and 16 are
Each of the rotation shafts 20 is fixedly attached to a rotation shaft 20 for operating the book.
0 is rotated to simultaneously operate one or both of the clamp levers to hold them in a clamped or open state.

That is, as shown in FIG.
8 is attached, and the rotation shaft 20 passes through the boss portion 18a formed on the wall plate 18.

The rotating shaft 20 has a body portion 19 formed on one end thereof, and cams 22 and 23 are fixedly provided on the penetrating side.

When fixing these, each is supported non-rotatably by a key 20b, and a spacer collar 24 is placed between the cams.
and fix the other end with the seat plate and nut 20a,
Further, when attaching these, the rotating shaft 20 and the cam can be freely changed, such as by attaching the rotating shaft 20 and the cam using appropriate push screws using a spline joining method.

These cams 22 and 23 are arranged to correspond to the clamp levers 15 and 16, respectively, and the clamp lever 16 on the movable side 2 can be moved from the position shown in FIG. 6 to the position shown in FIG. 9 by a welding operation described later. Since the clamp lever 16 moves to the left in the drawing, the cams 23 corresponding to the clamp levers 16 are mounted at such widths and positions that they come into contact with each other at the same position.

Note that if this moving distance is long, it is necessary to make the cam 23 particularly wide.

On the other hand, as shown in FIGS. 8 and 7, these cams 22 and 23 form inactive surfaces that do not come into contact with the clamp lever by rotating 90 degrees, but they do not touch the clamp lever 15 on the fixed side 1. The corresponding cam 22 is formed with one inactive surface 22a, and the clamp lever 16 on the movable side 2
Two non-active surfaces 23a and 23b are formed on the cam 23 corresponding to the cam 23.

On the other hand, the rotation shaft 20 on which these cams are fixed has a bundle 21 fixed on its body 19 as shown by the dashed line 21 in FIG.
A1 It is held in the rotated position as shown by the dotted line 21b, but the mechanism for holding this position is regulated by non-pressure contact between the inactive surface formed on each cam and the contact surface of the clamp lever. Alternatively, the position may be held by a ball stopper provided on the contact surface between the boss portion 18a and the body portion 19.

In the illustrated example, when the bundle 21 is in the solid line position, the cams 22, 23 maintain the positions shown in FIGS. 7 and 8, respectively, and neither the clamp levers 15, 16 operate.

That is, as shown in FIG. 4, the clamp levers 15 and 16 are held in a state in which the tip pressing portions 15a thereof are pressed against the gripping base 13 to clamp the wire.

Further, when the bundle 21 is held at the position 21a described above, the cams 22 and 23 are rotated and held in position as shown in FIGS. 10 and 11, respectively, and the clamp lever on the fixed side 1 is
Only 15 is actuated by cam 22.

That is, as shown in FIG. 14, the clamp lever 15 is opened so that its tip side pressing portion 15a is separated from the gripping base 13 and the wire can be removed.

Further, since the inactive surface 23b of the cam 23 faces the clamp lever 16 on the movable side 2, the clamp lever 16 does not operate and maintains a state of clamping the wire.

Further, when the bundle 21 is held in the position 21b described above, the cams 22 and 23 actuate the corresponding clamp levers 15 and 16, respectively, as shown in FIGS. Open each.

Then, the bundle 21 is returned to its original position or further rotated in the rotational direction to maintain the positions shown in FIGS. 7 to 13 and operate the respective clamp levers.

The butt welding machine constructed in this manner is operated as follows.

That is, in order to clamp the terminal end and starting end of the wire W to the clamp levers 15 and 16, respectively, the abutment cam 6 shown in FIG. 1 is first rotated 90 degrees in the direction of the arrow shown in FIG. 2 are moved apart against the tension spring 5, and then the cam actuated bundle 21 is held in position 21b, thereby opening the respective clamp levers as shown in FIG. 12.13.

In order to regulate the clamping position of these wires, an end stopper 12 (FIGS. 1 to 3) is provided.

The stopper 12 is configured to face the wire clamping portion only when the movable side 22 is moved apart in connection with the operation of the bundle 7.

10.11 are these operating levers and links.

Therefore, when holding the end and starting end of the wire,
The abutting protruding end surfaces are regulated by the stopper 12.

Then, either the terminal or the starting end is positioned in the clamping part of the movable side 22 and placed, and the cam operation handle 21 is moved to 21b.
When the clamp 16 on the movable side 2 is rotated from the position 21a to the position 21a, the clamp 16 on the movable side 2 is released from being pressed down by the cam 23 and clamps the placement wire.

Next, when the wire end on the other side is placed against the stopper 12 as described above to restrict its position and the operating handle 21 is moved to the solid line position, the clamp lever 15 on the fixed side 1 becomes inactive and clamps the wire. Wires held together are
It is clamped with a specific spacing between its abutting surfaces.

When welding, the stopper 12 returns to the position shown in FIG. 2 by returning the contact cam 6 as shown in FIG. When the wires come into contact with each other and in conjunction with this return operation, electricity is applied to each wire clamping portion to perform butt welding.

When welding is completed, the operating handle 21 is returned to position 21b and the welding wire is taken out.

In these embodiments, the cam for operating the clamp lever was provided above the clamp lever, that is, on the opposite side where the pressure spring was installed. It can be implemented in the same way even if it is provided on the installation side.

With this configuration, the wall plate 18 can be made low, so it is suitable for installation in a narrow space.

That is, in FIG. 15, the frame 2 is placed on the lower surface side of the clamp lever 15.
5 is attached, and the cam acts on the bottom surface of the frame. FIG. 16 shows a cam engaging portion 15b formed integrally with the clamp lever 15, and the clamp lever 1 on the other side.
6 is formed in the same way.

Further, when the clamp lever itself is made of an electrically conductive material as in these embodiments, the cams 22, 23
is made of insulating material.

The insulation may be constructed by attaching an insulating material 26 to the cam contacting surface of the clamp lever as shown in FIG. 17, and these materials can be selected freely.

Note that these insulating cams can be similarly implemented even if only one side thereof is made of an insulating material.

Since the butt welding machine of the present invention is constructed in this manner, the wire can be attached and removed very easily.

Also, there is no need to press the clamp lever by hand.
Butt welding can now be performed by installing it in narrow spaces.

Furthermore, the clamping pressure of the wire can be increased, and benefits such as reliable butt welding can be enjoyed.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of a butt welding machine, Fig. 2 is a lower side side view of Fig. 1, Fig. 3 is a plan view for explaining the operation of Fig. 1, and Fig. 4 is an example of Fig. 2. FIG. 5 is a plan view of FIG. 4, FIG. 6 is a front view in the direction of arrow A in FIG. 4, and FIGS. 7 and 8 are section lines of FIG. -■ and ■-■ cross-sectional views in the direction of the arrows, Figure 9 is an explanatory diagram of the operation of Figure 6, Figures 10, 11, 12, and 13 are all Figures 7 and 8. FIG. 14 is an explanatory diagram of the operation in FIG. 4, FIGS. 15 and 16 are schematic side views showing another embodiment of the present invention, and FIG. 17 is a diagram showing another embodiment of the present invention. FIG. 1...Fixed energized arm (fixed side), 2...
Movable current-carrying arm (movable side), 3...:...base plate, 4...
...Axis, 5...Tension spring, 6...
Contact cam, 7... Handle, 8... Bracket, 9... Pulley, 10... Lever, 11... Link, 12... Stopper, 13... Gripping base, 14... Pivotal part, 15, 16... Clamp lever 117...
...Coil spring, 19...Body part, 20...
... Rotation axis, 21 ... Operation handle, 22,
23...Cam, 24...Spacer collar, 25...Frame, 26...Insulator.

Claims (5)

[Scope of utility model registration request] (1) A butt welding machine for butt welding welding wires, comprising a fixed current-carrying arm that clamps near the end of the wire on one side, and a fixed current-carrying arm that pinches the wire near the end of the other side and is held between the fixed current-carrying arms. In addition, a movable energized arm that moves and pressure-contacts the end of the other wire to the end face of the wire on one side is avoided, and the clamp levers that clamp both wires are configured so that they are clamped by the reaction force of the elastic member. , cams are installed opposite to each other on the clamping operation side of these clamp levers,
These cams are fixed to one operating rotation shaft, and by rotation of the rotation shaft, one or both of the clamp levers can be held in the wear clamping state at the same time against the reaction force of the elastic member. Alternatively, a butt welding machine characterized in that it is configured to be held in an open state. (2) Utility Model Registration Scope of Claim 1 The butt welding machine according to claim 1, wherein the cam is arranged on the opposite side of the clamp lever operation side from the side where the explosive material is arranged. (3) Utility Model Registration Scope of Claim 1 The butt welding machine according to claim 1, wherein the cam is arranged on the side where the explosive material is arranged on the side where the clamp lever is operated. (4) Utility Model Registration Claims 1, 2, or 3, the butt welding machine in which the cam is constructed of an insulating cam on only one side. (5) The butt welding machine according to claim 1, 2 or 3 of the utility model registration, wherein the clamp lever is constructed by attaching an insulating material to the cam contacting surface.