JPS6118555A - Welding truck for steel plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a truck for an apparatus for continuously and automatically welding steel plate tank shells.

Conventionally, to form the shell of a steel plate tank, a lower end plate 21 and a lower end plate 22, which are bent at the joint surface 23, are formed by using a fixed-length steel plate as the front plate to form the shell of a steel plate tank, as shown in FIG. It was made into an arc shape, and a rail 24 was provided on the floor 2 near the outer periphery. A driving wheel 26 and a driven wheel 27 are provided on the underframe δ, and a driving device 29
A control panel, a welding wire, a wire supply device, a cylinder for shielding gas, etc. are mounted on the underframe 25.

Drive wheel 26. The driven wheel 27 is in contact with the rail 24 and the roller 4
1 runs around the outer periphery while contacting the steel plate 21 to prevent the cart from overturning. In this case, rails 24 are provided on the floor 2, and the cart moves using the rails 24 as a guide. A floor 2 is provided near the outer periphery of the lower end plate 22, but the upper surface of this floor 2 is a working floor for constructing the shell and is not a dedicated floor for running the trolley. Cargo handling, worker walking, miscellaneous loading of tool parts, etc. onto the floor. Floor 2 itself is a temporary floor made of many panels, making it easy to dismantle, remove, and relocate. In order to install the rail 24, the rail 24 is carefully centered and installed by temporary welding so that the rail 24 does not bend. For this reason, laying the rails 24 takes time and sometimes requires repeating the starting run several times, which is a problem at shell construction sites, and the protruding rails 24 sometimes impede workers' walking. For this purpose, it is best to run the trolley directly on a flat floor 2.

An object of the present invention is to provide a welding cart that can run along the outer periphery of the shell without overturning, without requiring the conventional running rails for driving wheels and driven wheels.

The present invention provides a truck for stacking bent steel plates forming a part of a circular arc and welding the horizontal surfaces to form a shell, and the truck is provided with a driving wheel, a driven wheel, and a roller that contacts the shell,
A lever is fixed to the upper side of the truck of the vertical arm of the driven wheel,
A spring is installed between the fixing metal fitting provided on the truck and the lever, and the moving direction of the idler wheel is slightly adjusted by the spring.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, a driving wheel 13 and a driven wheel i4a, 144 which are in contact with the floor 2 are provided on the underside of the underframe 25, and the underframe 25
A guide roller 17a that rolls in contact with the shell on the side surface of 5.
, 174 are provided. The support frame 60 of the drive wheel 15 is the underframe 25
The power of the drive device 16 is transmitted to the drive wheels 15 via the gear 15. The driving and driven wheels are made of hard rubber.

The driven wheel 14eL (or 14b) has a shaft 63 fixed to a support frame 61 as shown in FIGS. 3 and 4, and the shaft 63 passes through the underframe 25 and is rotatably attached via a bearing 62. The lever 15 is fixed to the tip of the shaft 66 and tightened with a nut 64. Fixing metal fittings 19a and 194 are mounted on the underframe 25, and springs 18a and 184 are installed between them and the tip of the lever 15. The material of the spring is SUP and the cross section is circular.

Next, the operation of this configuration will be explained with reference to FIG.

When the outer radius of the shell is r, the driven wheels 14a and 144 are set in the tangential direction of the arc of γ1ki09r. When the driving device 16 drives the driving wheel 13 in the inward direction via the gear 15, the radius of the traveling locus of the driven wheel i4a becomes γ, and the driven wheel 14tL moves in the tangential direction of γ, as shown by the dotted line in FIG. position. Accordingly, the spring 18a is extended by the tension applied by the lever 15, and the spring 184 is contracted by the compression applied, but returns to its initially set state due to the restoring force of the spring. , that is, the spring is the driven wheel 14
eL serves to orient the tangential direction of Krl.

The shell outer radius γ is not constant due to can manufacturing errors, and since can manufacturing errors are about 1/1000, when γ=15 m, it is 15 mm. The guide rollers 17eL and 174 roll in contact with the outer surface of the shell so as not to separate from it.

As described above, the present invention provides a bogie with one driving wheel and two driven wheels.
Since it is supported at three points, it does not fall over while running, and the trolley always moves along the outer circumferential surface of the shell via the guide row 2, so there is no need to provide rails on the floor, which helps reduce costs. There is.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a view taken along arrow A-A in FIG. A sectional view taken along the line B-B in the figure, FIG. 5 is a diagram explaining the locus of the driven wheels, and FIG. 6 shows a supporting truck. 2: Floor 16: Drive shaft 17 (L-174: Driven shaft 15
Nilever 18a-18A-18a', 187'!
Spring 17a: 177 Guide roller Ko 1 ward R layer 5th opening

Claims (1)

[Claims] In a welding combination truck, in which a floor is provided around the outer periphery of an arc-shaped shell, and a welding device is installed on a truck that runs in contact with the floor surface and the outer periphery of the shell, the shell is constructed by welding steel plates. The frame has a rotatable shaft, a driven wheel and a lever are installed on the shaft, the lever is fixed to the underframe via a spring, and a guide roller is provided on the side of the underframe that contacts the outer periphery of the shell. A steel plate welding cart characterized by a lever that swings to change the direction of the driven shaft.