US2515548A - Means for displacing, swinging, and adjusting plates in relation to shears - Google Patents

Description

y 1950 J. T. BROGREN ET AL 5 5 MEANS FOR DISPLACING, swmcmc, AND ADJUSTING PLATES IN RELATION TO SHEARS Filed May 7, 1945 2 Sheets-Sheet l July 18, 1950 J. T. BROGREN m. 2,515,548 MEANS FOR DISPLACING, swmer AND ADJUSTING' PLATES IN RELATION TO SHEARS Filed May '7, 1945 2 Sheets-Sheet 2 Patented July 18, 1950 MEANS FOR DISPLACING, SWINGING, AND

ADJUSTING PLATES SHEARS IN RELATION TO Johan Tiodolf Brogren, Domnarvet, and John Filip Larsson, Borlange, Sweden Application May 7, 1945, Serial No. 592,307

In Sweden February 18, 1943 Section 1, Public Law 690, August 8, 1946 Patent expires February 18, 1963 v 6 Claims. (01. 1644s) For the purpose of displacing, swinging and adjusting plates with respect to shears rolling supports or the like are known on which the plate to be treated is resting, and which can be conveyed by guides on a straight path and on an arc-shaped path, turn-tables being provided at the junction of the two paths. It is possible to cut all four edges of a plate by the said means with the same shears. However, they are expensive to build and their motive mechanisms are rather complicated. By the said means it is only possible to mechanically perform the coarse adjustment of the outlines of the plate edges to be cut in relation to the cutting plane of the shears, whereas the final exact adjustment has to be made manually. The guidance of the said turntables must also be efiected manually.

Further, there are known means for displacing, swinging and adjusting plates at shears in which the plates resting on swan necks are adjusted by means of electro-magnets movable on swinging arms in the form of travelling crabs.

However, in order to cut all four edges of a plate two shears must be usedin this case, and in order to avoid troublesome and time-consuming works even three shears must be used. Also this plant is complicated and expensive, and requires a special workman on the transportable rolling support which workmen cannot be employed for the service, for example, of starting the shears.=

The object of the present invention is to elim inate all these drawbacks.

The invention is characterized by the fact that in devices of the last-mentioned kind using only a single pair of shears the axesof rotation of one or more swinging arms, each carrying one or two electromagnets, are located next to the shears so that, in addition to rectilinear movements of a plate to be treated, also a swinging of the arms for any angle required is possible. The axes of the swinging arms may have a fixed point of rotation at the shears. Further, the swinging arms with their ends remote from the axis of rotation may run on arc-shaped tracks. Moreover, each swinging arm may be provided with a foot, and the arc-shaped track may be located on the floor of the works. The said foot resting on the floor may be formed as a closed or open portal.

The invention is illustrated diagrammatically by way of examples in the accompanying drawmg.

Figure 1 shows a plant in plan and Figure 2 in side view. Figures 3 and 4 show details of the plant. Figure 5 shows another embodiment in plan.

a indicates the shears which may be ordinary plate shears. Before the shears are located roller supports 1 so-called swan necks, on which the plate A the edges of which are to be cut, rests after having been advanced on the live roller bed c, ,for example. To the shears is connected a long crane girder or the like e which is swingable mechanically round a fixed shaft d. A travelling crab 1 which appertains to, the girder and is mechanically driven, carries a strong electromagnet g of required intensity. The magnet is adapted to be raised and lowered, and is steadily guided by the crab f. The raising and lower-.

ing movements of the electromagnet, the displacement of the travelling crab f, and finally also the swinging movement of the girder e are performed mechanically in any known way. In

order to enable the swinging of the plate round another centre than that of the crane girder e the magnet is swingable round a vertical shaft in the crab f. The operating device is attended to by a single person normally having his place at h so that he can survey all movements and naturally also the shears in order to establish whether the adjustment of the plate is the desired'one prior to the cutting.

Normally, the device operates in such a way...

be situated so far into the shears that the desired first piece can be cut off. If required, the plate has also been subjected to a slight adjusting movement by mechanical swinging of the arm e in one direction or the other, in order that the line I marked on the plate for the cutting of the first end shall exactly assume the position A1 cor- Now the electroresponding to the knife edges. magnet is disengaged and movedwith the crab to the next position, islowered'again and set in function. The swinging crane is swung so that the plate arrives at the position A2. By applying the electromagnet to suitable places by slight displacement of the crab f and by a small swinging, if necessary, of the girder e in the required direction the plate is adjusted until the edge line 2 exactly coincides with the cutting edges of the knives. The first cutting of the longitudinal edge is followed by further cuttings after displacement of the plate by means of the electromagnet in the direction of the edge line 2 until the wholly longitudinal edge has been cut and the position A2 has been reached.

After disengagement oi the electromagnet the girder c is swung 180 and, after the magnet has been applied again to a suitable place, the plate is swung 90 again for cutting the other end of the plate along the edge line 3, and finally, after a final swinging of 90, the other longitudinal edge of the plate is cut along the edge line B.

The adjustment of oblique plates and of plates with non-parallel edges is made in the same way by swinging the girder the required angle.

It is clear that in the way described the plate is displaced completely mechanically before the shears in order to be out clean on all sides. The device works safely and quickly, and has a high capacity also with few persons attending to the same.

It is important that the guidance of the electromagnet g in the vertical direction and the guidance of the crab 1 on the girder e are free from play as much as possible so that, after finished application of the magnet to the plate, the desired movement of the latter by regulation of the appertaining drive device can be safely and exactly executed.

No restriction of the reliable operation is involved if the electromagnet has jointed connection with its vertical guide so that at irregularities, if any, of the plate the electromagnet can better follow the plate in order to be rigidly connected therewith.

In order to prevent hanging of the girder and, under load, also to insure the horizontal position of the girder required for a reliable function it is, apart from the cases in which it is the question of cutting the edges of light and short plates, desirable to support the girder also at the end not facing the axis of rotation. For this purpose the said end is located on an upright or foot member 2' which by wheels it rests on a track I arranged concentrically in relation to the axis of rotation.

At the lower end the upright is formed either according to Figure 3 or Figure 4 in order not to prevent the insertion of the plate on the roller supports in the direction of the arrow.

Naturally, the action of the device can also be extended to the back of the shears when it is the question of moving plates located there.

The track Z and thus the whole roller support field are preferably surrounded with a protection wall consisting of metal sheets m to keep persons not attending to the work ofi? from the risk zone formed by the swinging of the plate.

As indicated in Figure 1, the girder is preferably fixed to the shears themselves. However, it is also possible to fix it independent of the shears, to the roof construction of the building for example; the ring track I may also be fixed independently, in which case the upright i is omitted.

At very long plates and correspondingly long girder it may be suitable that two travelling crabs f and magnets g movable independent of one another co-operate in order to shorten the way for the crab, and thus facilitate a quicker displacement and adjustment of the sheet. The last-mentioned aim is also furthered if according to Figure 5 a second girder c with crab f and magnet g are used so that one girder preferably is active in the sector XY and the other girder in the sector X--Z.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In apparatus for displacing swinging and adjusting plates in relation to a shear device a roller bed in advance of and in close proximity to the shear for supporting plates to be operated upon a horizontall swingable arm pivotally mounted at one end on a fixed pivot at the shear and extending horizontally from the shear above said roller bed, a travelling crab carried by said arm and movable longitudinally thereon, electromagnetic means carried by said travelling crab in operative relation to plates supported on said roller bed whereby said plates may be displaced, swung, angularly adjusted and moved rectilinearly with respect to said shear.

2. In apparatus for displacing, swinging and adjusting plates in relation to a shear device, a roller bed in advance of and in close proximity to the shear for supporting plates to be operated upon, a plurality of horizontally swinging arms pivotally mounted at one end on fixed pivots close to the shear and extending horizontally from the shear above said bed, travelling crabs carried. by said arms and movable longitudinally thereon, electromagnetic means carried by said travelling crabs in operative relation to plates supported on said bed, whereby plates positioned on said bed may be displaced, swung, angularly adjusted and moved rectilinearly with respect to said shear.

3. Apparatus according to claim 1 in which the end of the swinging arm remote from the pivot is supported by an arc-shaped track.

4. Apparatus according to claim 2 in which the ends of the swinging arms remote from the pivot are supported by arc-shaped tracks.

5. Apparatus according to claim 2 in which the ends of the swinging arms remote from the swinging centre are individually provided with a foot member and in which the foot members- REFERENCES CITED The following references are of record in the file of this patent:

FOREIGN PATENTS Number Country Date France Sept. 10, 1919'

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