JPH04294894A - Working machine for welding for construction - Google Patents

Abstract

PURPOSE:To easily make the change of the welding equipment and to efficiently and safely execute with welding. CONSTITUTION:The working stand 4 is set freely elavating and lowering on the running car body 1 through the elavating/lowering mechanism 2, and the permanent magnetic 31 for fixing the working stand 4 to the body is set at the working stand 4. The mast 6 is stood on the working stand 4, the arm 9 is set at the mast 6 freely rotationable around the vertical axis center, and also the arm 9 is composed so as to be freely extendable to the horizontal direction. The motor driven hoist 11 that the hanging, quality is changable is attached to the arm 9, the welding equipment 12 which provides the torch of its position being changable with the electric motor is set, and the welding is executed efficiently by changing the welding equipment 12 to the arbitrary position with the run of the running car body 1, the elavating and lowering of the working stand 4 and the change of fixing position of the welding device 12.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to construction sites.
This invention relates to a construction welding machine used for welding temporarily joined steel columns and steel beams, or for welding steel columns together.

0002

BACKGROUND OF THE INVENTION Conventionally, welding work at construction sites as described above has generally been carried out by a welder carrying a torch to a pillar hanging scaffold near the welding location. However, in recent years, there has been a tendency for there to be a shortage of skilled workers in welding work as the population ages, resulting in a problem of decreased work efficiency and quality. Therefore, a welding device was developed that automatically performs welding by moving the torch along a predetermined trajectory by installing a robot body that holds a torch so that it can move along guide rails and attaching it in a predetermined position near the welding location. has been done.

0003

[Problems to be Solved by the Invention] However, in conventional welding equipment, the robot body and guide rail are integrated in addition to the torch, which increases the weight of the entire equipment, and it is difficult to use such a heavy equipment. There is a drawback that it takes time and effort to perform the refilling, and the work efficiency decreases.

[0004] Further, welding work at construction sites often involves work at high places, and it takes time and effort to replace equipment, which not only reduces work efficiency but also poses a problem of lack of safety.

[0005] The present invention has been made in view of the above circumstances, and the invention according to claim 1 provides a construction welding method that allows for easy replacement of welding equipment and that allows for efficient and safe welding. The object of the invention according to claim 2 is to provide a working machine, and the invention according to claim 2 aims to further improve work efficiency by easily moving a welding device to a welding location, and furthermore, the invention according to claim 3 It is an object of the invention to further improve work efficiency by easily moving a welding device vertically relative to a welding location.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the construction welding work machine of the invention according to claim 1 is provided with a work platform that can be raised and lowered on a traveling vehicle body, and that can be displaced by a drive mechanism. A welding device equipped with a torch is provided on a workbench so that its fixing position can be changed via a holding means, and a fixing mechanism is provided for fixing the workbench to a frame.

[0007] Furthermore, in order to achieve the above-mentioned object, the construction welding work machine of the invention according to claim 2 is arranged such that the holding means according to claim 1 is arranged such that the arm is vertically mounted on a mast that is erected on a workbench. The arm is configured to be rotatable around an axis and to be extendable and retractable in the horizontal direction, and the arm is provided with a hanging means that can change the amount of suspension.

[0008] Furthermore, in order to achieve the above-mentioned object, the construction welding machine of the invention according to claim 3 is constructed by installing the arm according to claim 2 on a mast so as to be movable up and down.

[0009]

[Operation] According to the configuration of the construction welding machine of the invention according to claim 1, the traveling vehicle body is moved to a position corresponding to the lower part of the welding location, and in that state, the work table is raised to operate the welding device. The workbench is transported to a position approximately at the same height as the welding point, the workbench is fixed to the frame using a frame such as a steel column or beam using a fixing mechanism, and in this fixed state, the welding device is moved to the welding point by the holding means. and lock in place.
Welding work can be performed by driving and displacing the torch.

Further, according to the structure of the construction welding machine of the invention according to claim 2, the workbench is fixed to the frame at a location near the welding location, and in this state, the arm is rotated around the mast. At the same time, it expands and contracts horizontally, moves the welding device to a location corresponding to the vertical direction of the welding location, and adjusts the amount of suspension of the hanging means appropriately, thereby positioning the welding device at an appropriate position relative to the welding location. Can be fixed.

Furthermore, according to the structure of the construction welding work machine of the invention according to claim 3, even when the workbench cannot be raised due to a beam or the like, the welding equipment can be raised by raising the arm. It can be fixed at an appropriate position relative to the welding location.

0012

[Embodiment] Fig. 1 is a side view of a construction welding machine according to the present invention, and Fig. 2 is a side view of the construction welding machine in an elevated state. A workbench 4 is provided via the mechanism 2 and the hydraulic cylinder 3,
By driving and expanding and contracting the hydraulic cylinder 3, the workbench 4 can be raised and lowered to a desired height position up to the height of three floors.

The traveling vehicle body 1 is provided with outriggers 5 at each of its four corners, and is configured to prevent the traveling vehicle body 1 from moving unexpectedly when moving up and down the work platform 4.

On the other hand, as shown in the side views of main parts in FIGS. 3 and 4, a mast 6 is erected on the workbench 4, and an arm 9 consisting of a column side member 7 and a tip side member 8 is installed. A strut portion 7a is fitted into the mast 6 so as to be movable up and down and rotatable around a vertical axis.

The column side member 7 and the tip side member 8 are connected so as to be relatively movable via rollers 10, as shown in the cross-sectional view of the main part in FIG. is configured to do so. A welding device 12 is suspended from the tip of the tip side member 8 via an electric hoist 11 serving as a hanging means whose hanging amount can be changed.

The welding device 12 is constructed by installing a movable body 14 holding a torch 13 so that it can be linearly driven and displaced on a support base 15 by an electric motor M serving as a drive mechanism. The torch 13 can pass through narrow areas such as the scallop 18 well, and the welding work on the steel beam 16 and the steel column 19 can be performed easily and satisfactorily. A toggle type fixture 20 is attached to the lower surface of the end side of the support base 15, and the flange 21 of the steel beam 16 is sandwiched between the lower face of the support base 15 and the fixture 20, and the welding device 12 is attached to a predetermined welding location. It can be fixed with.

Pin holes 22 are formed in the support portion 7a of the support side member 7 at predetermined intervals in the longitudinal direction, while fixing pin holes 23 are formed in the mast 6. As shown in the side view of the main part of FIG. 4, with the support portion 7a dropped into the mast 6, the fixing pin 24 is inserted across the pin hole 22 at the top of the support portion 7a and the fixing pin hole 23. When moving the welding device 12, the fixing pin 24 at the upper end of the mast 6 is inserted into a predetermined pin hole 22 in the support portion 7a, and the welding device 12 is fixed in a state where it cannot be rotated or raised or lowered. The arm 9 is configured to be rotatable.

A U-shaped locking tool 26 is connected to the upper end of the support portion 7a of the support side member 7 via a chain 25, and a thumbscrew for tightening and fixing is connected to the locking tool 26. 27 is attached, and as shown in FIG.
6, the arm 9 can be raised and lowered relative to the mast 6 using the hydraulic cylinder 3 of the lifting mechanism 2 of the workbench 4.

That is, with the fixing pin 24 removed,
By shortening the hydraulic cylinder 3 and lowering the workbench 4 by a predetermined height, the arm 9 is pulled up and inserted into the predetermined pin hole 22.
The arm 9 can be raised relative to the mast 6 by inserting the fixing pin 24 through it, while the arm 9 can be raised by shortening the hydraulic cylinder 3 and lowering the work platform 4 a little, and in this state the fixing pin 24 can be raised. After that, remove the hydraulic cylinder 3.
By extending the work platform 4 and raising it by a predetermined height, the arm 9 can be lowered relative to the mast 6.

As shown in the partially cutaway rear view of FIG. 6, a guide rail 28 of a predetermined length is attached to a predetermined location of the workbench 4, and a guide rail 28 is slidably movable via rollers 29. A support rod 30 is provided at the support rod 30, and a permanent magnet 31 is attached to the tip of the support rod 30. A fixing screw 33 that can be screwed into the support rod 30 by a rotary operation handle 32 is attached to the support rod 30, and the workbench 4 is fixed in a predetermined position. While the support rod 30 is placed in the position, the support rod 30 is slid and moved, and the permanent magnet 31 is attached to the steel beam 1 by its magnetic force.
At the same time, the fixing screw 3 is fixed to the web 17 of 6.
3 is screwed in to fix the support rod 30 to the guide rail 28, thereby fixing the workbench 4 to a frame such as the steel beam 16. The permanent magnets 31 may be provided at both ends of the support rod 30.

Further, a limit switch 34 is attached to a predetermined location on the workbench 4, and a projection is provided on the support rod 30 side so as to act on the limit switch 34 when the permanent magnet 31 is displaced into the workbench 4. A section 35 is provided. The limit switch 34 is connected in series with a solenoid valve switch (not shown) that opens and operates the control valve of the hydraulic cylinder 3, and is in a state where the permanent magnet 31 is not located in the workbench 4, that is, During welding work, the workbench 4 cannot be raised or lowered to improve safety. In the figure, numeral 36 indicates a lever for switching the permanent magnet 31 between a state in which magnetic force is applied and a state in which it is not applied.

At one side edge of the workbench 4, as shown in the side view of the main parts of the workbench in FIG. 7 and the front view of the workbench in FIG. 8, a pair of pillars 37, 37 are used as guides. , the upper end sides of the two gangways 38, 38 are provided so as to be movable up and down, and handrails 39, 39 are provided on the upper side of each of the ramps 38, 38, and the handrail 3
9, 39 and the upper ends of the columns 37, 37 are connected to the chain 4.
During normal operation, the gangway 38 is pulled up and its lower end is inserted into the floor of the workbench 4 to store it in an upright position.On the other hand, during welding work, the workbench 4 It is constructed so that it can be spanned from the base to a welding work site such as a hanging scaffold 41 provided on a steel column 19, and can be easily transferred to the welding work site.

In FIG. 1, 42 indicates a control box provided on the traveling vehicle body 1, and 43 indicates a control box provided on the workbench 4. It is configured so that it can be performed from either side.

Although not shown, a water hose, a gas hose, a power cable, and a wire supply device extending from the traveling vehicle body 1 are connected to each of the welding devices 12 and 12, and The control box 43 and each of the welding devices 12, 12 are connected via control cables, and the control box 43 connects each welding device 1
2 and 12 are connected to corresponding operation pendants, so that welding work can be performed by remote control.

Next, the welding operation will be explained using the schematic plan view of FIG. 9.

First, as described above, the arm 9 is raised to a predetermined height relative to the mast 6 by attaching the locking tool 26 to the flange 21 of the steel beam 16, and in this state, the workbench 4 is moved to a predetermined height. After rising to a certain height, the permanent magnet 31 is attracted to a predetermined location of the web 17 of the steel beam 16 by the fixing mechanism to fix the workbench 4 to the frame.

After that, the gangway 38 is stretched over the suspended scaffolding 41 installed on the steel column 19, and the work platform 4 and the suspended scaffolding 41 are connected to each other.
The operator gets on and off the machine, rotates and extends the arm 9, moves the welding devices 12 and 12 to the welding location, adjusts the amount of suspension using the electric hoist 11, and toggles the flange 21 of the steel beam 16 at a predetermined location. The steel beam 16 and the steel column 19 are fixed by a fixing device 20 of the type shown in FIG.

As the holding means for fixing the welding device 12 to the workbench 4 so that the fixed position can be changed, as in the above-mentioned embodiment,
An arm 9 is provided on the mast 6 so as to be rotatable around the vertical axis, and the arm 9 is configured to be extendable and retractable in the horizontal direction. For example, various means such as the following can be adopted, instead of being limited to the configuration in which the device is hung in a changeable manner.

(1) As a hanging means, a winch is provided on the workbench 4 side, and a hanging wire is fed out from the winch along the arm 9, and the hanging wire is suspended from the tip of the arm 9. welding equipment 1
Attach 2. (2) The arm 9, which is configured to be extendable and retractable, is provided so that it can be rotated and fixed in the vertical direction around a horizontal axis. (3) The arm 9 is configured to be only extendable and retractable. At this time,
A swivel base is provided on the traveling vehicle body 1 so as to be rotatable around the vertical axis,
On the swivel base, there is a pantograph type lifting mechanism 2 as described above.
The workbench 4 may be provided so as to be able to be raised and lowered via. (4) To extend and retract the arm 9, an air cylinder, a hydraulic cylinder, or a structure that extends and contracts by rotation of a screw shaft is used. (5) An electric motor or the like is used to rotate the arm 9. (6) To move the arm 9 up and down with respect to the mast 6, an air cylinder, a hydraulic cylinder, or a structure that expands and contracts by rotation of a screw shaft is used.

[0030]

According to the construction welding machine of the invention according to claim 1, the welding device can be transferred from one welding location to another by moving the traveling vehicle body and raising and lowering the work platform. Furthermore, since the torch of the welding device can be positioned with respect to the welding location using the holding means, the worker does not have to carry the heavy welding device, and the welding device can be replaced easily and efficiently. Can be done.

Moreover, since the workbench is fixed to the frame by the fixing mechanism, even when welding is performed with the workbench raised high relative to the traveling vehicle body, the torch of the welding device can be positioned with respect to the welding location. This prevents the workbench from wobbling at times, and allows the welding equipment to be replaced safely.

Further, according to the structure of the construction welding machine of the invention according to claim 2, the welding device can be positioned at an appropriate position relative to the welding location while the work table is fixed to the frame at a location close to the welding location. Since the welding device can be displaced and fixed, the welding equipment can be easily moved to the welding location, further improving work efficiency.

Further, according to the construction welding machine of the invention according to claim 3, even when the workbench cannot be raised due to a beam or the like, the welding device can be placed at an appropriate position relative to the welding location. Since it can be fixed, work efficiency can be further improved.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of a construction welding machine according to the present invention.

FIG. 2 is a side view of the construction welding machine in a raised state.

FIG. 3 is a side view of main parts.

FIG. 4 is a side view of main parts.

FIG. 5 is a cross-sectional view of main parts.

FIG. 6 is a partially cutaway rear view showing the fixing mechanism.

FIG. 7 is a side view of essential parts of the workbench.

FIG. 8 is a front view of the workbench.

FIG. 9 is a schematic plan view showing a welding work state.

[Explanation of symbols]

1 Traveling vehicle body 4 Workbench 6 Mast 9 Arm 11 Electric hoist 12 as a hanging means Welding device 13 Torch 31 Permanent magnet M forming a fixing mechanism Electric motor as a driving mechanism

Claims (3)

[Claims] [Claim 1] A workbench is provided on the traveling vehicle body so that it can be raised and lowered,
Architectural use, characterized in that a welding device equipped with a torch that can be displaced by a drive mechanism is provided on the workbench so that its fixing position can be changed via a holding means, and a fixing mechanism is provided for fixing the workbench to a frame. Welding work machine. 2. The holding means according to claim 1, wherein an arm is provided on a mast erected on a workbench so as to be rotatable around a vertical axis, and the arm is configured to be extendable and retractable in a horizontal direction; A construction welding machine that is equipped with a hanging means that can change the hanging amount. 3. A construction welding machine, wherein the arm according to claim 2 is mounted on a mast so as to be movable up and down.