JPS605984Y2 - Welding traveling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a traveling device useful for automatic or semi-automatic welding in an upright or upward position.

In large welded thin-plate structures such as underground LNG tanks and LNG tankers, complex joints are often manually welded in an upright or upward position using TIG welding or plasma welding.

With automatic welding, even unskilled workers can easily obtain uniform and good welded joints, so welding automation is progressing. To save time, short joints and small parts are often done by hand.

There is a portable, portable semi-automatic welding device that does not require the trouble of installing and removing the device and can be easily performed by even unskilled workers. Since the welding is performed vertically, it cannot be used in an upright position.

Manual welding requires a high level of skill.

For example, the way the welding torch is moved, that is, the oscillation, must be done appropriately because it affects the quality of the weld, but not everyone can do this well.

This is difficult for unskilled workers, and it is necessary to rely on skilled workers who have high wages, which increases the cost of the product.

In addition, since the number of skilled workers is decreasing, there is a strong desire to further automate welding.

The present invention is in response to the above-mentioned needs, and aims to provide a lightweight and compact traveling device that enables automation or semi-automation of vertical and upward welding, and has a built-in oscillation function.

The configuration of the present invention, which is distantly related to this object, is that in a traveling bogie having two pairs of front and rear wheels that sandwich a guide rail, a power transmission means for transmitting power between the front and rear wheels is connected between the axles of the front and rear wheels. A drive shaft integrally provided with a cam and driven and rotated is supported on the traveling bogie in parallel in the front-rear direction, and a clutch is provided between the drive shaft and each axle on one of the front and rear sides. , the traveling truck is equipped with a clutch attachment/detachment means for attaching and detaching these clutches, a guide rod extending in a left-right direction perpendicular to the traveling direction of the traveling truck is fixed to the traveling truck, and an oscillating plate to which a welding torch is attached is provided. The oscillating plate is installed so as to be reciprocally movable along the guide rod, and the oscillating plate is further provided with guide members located on both left and right sides of the cam to swing the oscillating plate left and right as the cam rotates. do.

The configuration of the present invention will be explained in detail below based on a specific example shown in the drawings.

Guide rail 2 that guides the traveling truck 3 along the welding line 1
It has a strip-like shape, and its left and right edges are formed into a chevron shape that protrudes in the width direction.

The guide rail 2 is equipped with magnets, suction cups, or other clamping means at both ends or at appropriate intervals (not shown), so that it can be attached to and removed from the workpiece with a single touch using these attachment devices. ing.

The traveling truck 3 is attached to the guide rail 2 by sandwiching the guide rail 2 between two pairs of front and rear traveling wheels 4, 4'.

The running wheels 4, 4' have a substantially drum shape corresponding to the shape of the left and right edges of the guide rail 2 described above, and their surfaces are coated with a material having a large friction coefficient, such as rubber.

Sometimes it is made entirely of hard rubber. The left and right spacing between the running wheels 4 and 4' is positioned slightly narrow so that the running trolley 3 does not fall off the guide rail 2 even if it is turned upside down by strongly sandwiching the guide rail 2.
The guide rail 2 strongly holds the traveling carriage 3 by elastic deformation and friction of the surface rubber layer.

These traveling wheels 4, 4' are rotatably mounted on the traveling truck 3 with the wheels 5, 5' perpendicular to the surface of the guide rail 2, and a sprocket 6 attached to one end of the wheels 5, 5'. A chain 7 is passed between the wheels 6', respectively, so that the front and rear running wheels 4, 4' rotate in conjunction with each other.

In the above-mentioned winding, the transmission means may be replaced with other transmission means such as a pulley and a belt.

A bevel gear 8 is fixed to the upper part of each of the pair of wheels 5' on one side in the front-rear direction, and a rotating shaft 10 rotatably provided with a bevel gear 9 meshing with each of the bevel gears 8 is oriented in the left-right direction. It is rotatably supported by the traveling trolley 3.

As shown in detail in FIG. 4a, each of the bevel gears 9 is integrally provided with an outer clutch disc 11 having inwardly facing saw blade-like irregularities.

An inner clutch disc 12 having outwardly protruding and recessed portions that engage with the recesses and recesses of the outer clutch disc 11 is fitted onto the rotating shaft 10 via a sliding key 13 provided in the axial direction of the rotating shaft 10 . It can rotate integrally with the outer clutch disc 11 and can slide toward the outer clutch disk 11.

A control rod 14 that grips the inner clutch disc 12 and extends in opposite directions in the left-right direction is provided on the upper part of the traveling truck 3 so as to be movable in the left-right direction.

As shown in FIG. 4, racks 15 are formed on the two control rods 14 so as to face each other, and a spur gear 16 is supported on the upper part of the traveling carriage 3 by meshing with these racks 15.

A lever 17 is connected to the upper part of the support shaft of this spur gear 16.

By operating this lever 17 and rotating the spur gear 16, the control rods 14 move in opposite directions to each other via the rack 15, and the inner clutch circle is moved along the rotation axis 10 by the control rods 14. The plate 12 and the outer clutch disk 11 are attached and detached.

In other words, the control rod 14, rack 15, pinion 16, and lever 17 constitute a clutch attachment/detachment means.

A worm wheel 18 is fixed to the center of the rotating shaft 10.

On the other hand, in the traveling direction of the traveling truck 3, a drive shaft 20 is driven and rotated by a drive motor 19 mounted on the traveling truck 3.
are supported by front and rear bearings 21°22.

A worm 23 is provided on the drive shaft 20 so as to mesh with the worm wheel 18 .

Therefore, the inner clutch disc 12 and the outer clutch disc 11
The rotation of the drive shaft 20 is caused by the attachment and detachment of the running wheels 4,
4' and semi-automatic running in which the rotation of the drive shaft 20 is not transmitted to the running wheels 4, 4'.

Note that the bevel gears 8 and 9 between the clutch and the wheel 5' may be any motion transmission means that transmits motion between two orthogonal axes, so other gears such as face gears or friction wheels may be used. It is also possible.

It is also possible to employ a worm gear and provide a clutch on the wheel 5' side.

An eccentric cam 24 is fixed to the end of the drive shaft 20.

Support plates 25 are provided on each of the left and right sides at the ends of the traveling trolley 3.
are installed, and two guide rods 26 extending in the left-right direction perpendicular to the traveling direction of the traveling trolley 3 are passed between these support plates 25.

An oscillating plate 27 is movably attached to the guide rod 26.

As shown in FIG. 5, a welding torch 29 is held on this oscillating plate 25 via a torch holding plate 28. As shown in FIG.

A guide member 30 as a follower of the eccentric cam 24 is attached to the oscillating plate 27 .

Therefore, due to the rotation of the eccentric cam 24, the oscillating plate 27 is reciprocated from side to side as shown by the arrow in FIG.

The eccentric cam 24 is a disk mounted on the drive shaft 20 with its center shifted, but other types such as a non-circular one or a yoke cam may also be used.

A substantially U-shaped connecting portion 31 when viewed from above is protruded from the end of the traveling truck 3, and this connecting portion 31 has a handle 32.
An arm 33 having an arm 33 is rotatably connected by a pin 34.

The arm 33 can be fixed at any angle by a locking mechanism.

The locking mechanism has a claw 35 in the shape of an arc on the connecting portion 31, and a locking plate 38 having a claw 36 at the tip that engages with the claw 35 and a lever 37 at the rear is moved around the connecting portion 31 by a compression spring 39. It is constructed by pressing on the

The claw 36 of the lock plate 38 and the claw 35 of the connecting portion 31 are engaged with each other by the spring force of the compression spring 39.
The arm 33 is in a fixed state, but the lever 37
By pulling and compressing the compression spring 39, the claws 35 and 36 are disengaged from each other, and the angle of the arm 33 can be changed.

The angle of the arm 33 is changed to make it easier to work depending on the work location, work conditions, etc.

To perform welding using this device, first the guide rail 2 is attached parallel to the welding line at a constant distance.

The traveling carriage 3 is attached to the guide rail 2 by sandwiching the guide rail 2 between two pairs of front and rear traveling wheels 4, 4'.

If the position and height of the welding torch 29 are adjusted in advance,
A welding arc can be generated immediately.

When the lever 17 on the top of the traveling truck 3 is operated to disengage the inner clutch disk 12 and the outer clutch disk 11 of the clutch, the traveling truck 3 can freely move onto the guide rail 2 by holding the handle 32 of the arm 33. You will be able to move above.

When it is desired to manually move the welding torch 29 in one direction of the welding line, the drive motor 19 is turned on with the clutch released.

The welding torch 29 can be moved manually along the welding line 1 by holding the handle 32, and at the same time, the welding torch 29 can be moved through the oscillator plate 27 by the cam engagement between the eccentric cam 24 and the guide member 30 due to the rotation of the drive shaft 20. 29 is given an oscillating motion in the left and right direction.

In the case of such semi-automatic welding, the handle 31 is adjusted to make it easier for the operator to work according to the welding work location and work conditions.
angle is adjusted.

When it is desired to advance the welding torch 29 at a constant speed, the lever 17 is operated to engage the clutch and turn on the drive motor 19.

The rotation of the drive shaft 20 rotates the two pairs of front and rear running wheels 4, 4' via the worm 23, worm wheel 18, paddle gears 8, 9, and axle 5', and the running trolley 3 runs stably on the guide rail 2. do.

The welding torch 29 is stably moved along the welding line by the traveling carriage 3.

At the same time, the welding torch 29 is oscillated from side to side via the oscillating plate 27 due to the cam engagement between the eccentric cam 24 and the guide member 30 due to the rotation of the drive shaft 20 .

As described above, according to the welding traveling device of the present invention, whether the traveling cart is fed automatically or manually, the welding torch is given an oscillating motion by the cam engagement between the cam and the guide member. , high quality welds can be obtained regardless of the skill level of the operator.

In addition, the structure of the device is simple, making it lightweight and small.
It also becomes easier to handle.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of an embodiment of the welding traveling device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a perspective view showing the oscillation mechanism in the embodiment, and Fig. 4a is a diagram showing the traveling wheels. FIG. 4 is a schematic diagram showing a clutch switching section, and FIG. 5 is a perspective external view of the embodiment. In the drawing, 1 is a welding line, 2 is a guide rail, 3 is a running truck, 4 and 4' are running wheels, 8 and 9 are bevel gears, 11 is an outer clutch disc, 12 is an inner clutch disc, and 14 is a control. 18 is a worm wheel, 20 is a drive shaft, 23 is a worm, 24 is an eccentric cam, 26 is a guide rod, 27 is an oscillating plate, 9 is a welding torch, and 30 is a guide member.

Claims (1)

[Scope of utility model registration request] In a traveling bogie having two pairs of front and rear wheels that sandwich a guide rail, a power transmission means for transmitting power between the front and rear wheels is provided between the axles of the front and rear wheels, is integrally provided with a cam, and has a drive rotation means. A drive shaft is supported on the traveling vehicle in parallel in the front-rear direction, clutches are provided between the drive shaft and each axle on one of the front and rear sides, and a clutch attachment/detachment means for attaching and detaching these clutches is provided on the traveling vehicle. a guide rod extending in the left-right direction perpendicular to the traveling direction of the traveling truck is fixed to the traveling truck, and an oscillator plate to which a welding torch is attached is installed so as to be able to reciprocate along the guide rod, The traveling device for welding is further characterized in that the oscillating plate is provided with guide members located on both left and right sides of the cam to swing the oscillating plate left and right as the cam rotates.