JPH11129014A - Metal plate inversion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal plate inversion equipment wherein the plural metal sheets piled up can be integrally inversed perfectly dispelling the generation of surface defect on the metal plate and a load collapsing. SOLUTION: The equipment comprises; a plural feed side arms 4 to hold one or plural sheet of piled level metal plates P at both sides edge and to stand up them by rotating around the shaft parallel to this side edges while retaining them by the plate surface, a plural receiving arms 8 which receive stood up metal plates P from the feed side arms 4 and hold them at the both sides edge, while retraining them by the plate surface, and then level them by rotating around the shaft parallel to the side edges in the same direction as the rotation mentioned above, and a shift mechanism which relatively move the feed side arms 4 and receiving arms 8 horizontally between the position where the interval of feed side arms 4 and receiving arms 8 is equal to the thickness of the metal plate and the position where the interval is larger than the thickness of the metal plate in the condition that the metal plate stood up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inverting one or more stacked metal plates such as steel plates for back surface inspection and back surface flaw repair.

[0002]

2. Description of the Related Art A typical type of a conventional steel plate reversing device is a two-arm opposed reversing device described in Japanese Patent Application Laid-Open No. 53-122659. In this method, a steel plate P ′ is attached to one of two arms 29 in a horizontal posture.
(FIG. 5 (a)), the arms 29, 30 are erected to stand upright and sandwich the steel plate P '(FIG. 5 (a)).
(B) to (d)), the steel plate P ′ is replaced on the arm 30 so that the arm 29 on which the steel plate P ′ is placed is placed on the arm 30 (FIG. 5E), and both arms 29 and 30 are horizontally moved. By returning to the posture, the steel plate P ′ is placed on the arm 30 in a direction inverted from the original direction.

As another conventional technique, there is a method using an adsorber such as a magnet, which is also proposed in Japanese Patent Application Laid-Open No. 53-122659. In this method, as shown in FIGS. 6A to 6C, a steel plate P ′ is fixed by an adsorber 26 on a reversing base 25 in which an adsorber 26 is embedded, and provided at one end of the base 25. By moving the wheels 23 along the vertical track 27 while moving the wheels 24 along the horizontal track 28, the wheels 23 provided at the other end of the base 25 are moved up and down.
The steel plate P 'is inverted.

[0004] These conventional reversing devices are for reversing steel plates or the like one by one. For example, as shown in FIG. 4, it is actually impossible to reverse a batch of steel plates of the same size at a time. I can't. That is, in the two-arm facing reversing device, when a steel plate is transferred from one arm 29 to the other arm 30 (see FIG.
(F)), since the stacked state of the plurality of stacked steel sheets is disrupted, adjacent steel sheets rub against each other, causing not only scratches on both surfaces of the steel sheet, but also, in some cases, load collapse due to an impact at the time of reversing. There is also danger.

[0005] In addition, in the reversing method using an adsorber, slippage during reversal can be sufficiently prevented by the adsorber if a single steel sheet is used. It is difficult to keep the steel sheet stable, and there is a risk of generating flaws on both surfaces of the steel sheet and collapse of the load. That is, when the steel plate approaches the upright position at the time of reversal, the steel plate is kept in a stacked state by the frictional force that makes the adsorption force a vertical drag, while the frictional force changes due to vibration and shock during operation, etc. This is because the holding state of the steel plate which is in a nearly upright posture becomes very unstable.

As described above, since the conventional reversing device can only reverse one metal plate at a time, a long time is required for the operation, and a device capable of reversing a plurality of sheets at once to improve work efficiency. The development of was long-awaited.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a metal plate capable of completely reversing a plurality of stacked metal plates, which has been conventionally difficult, by completely eliminating the occurrence of surface flaws and collapse of the metal plate. It is an object of the present invention to provide a reversing device.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided, according to the present invention, a structure in which one or more stacked horizontal metal plates are gripped on both side edges and held parallel to the side edges while being held on the plate surface. A plurality of feed-side arms that are rotated around a vertical axis and stand up, and the metal plate that stands up is received from the feed-side arm, is gripped by both side edges, is held on the plate surface, and is held around an axis parallel to the side edges. A plurality of receiving arms that are rotated in the same direction as the rotation to make them horizontal, and a position where the distance between the sending arm and the receiving arm when the metal plate is upright is equal to the thickness of the metal plate. And a shift mechanism for relatively moving the feed-side arm and the receiving-side arm in the horizontal direction between the feeder arm and the larger position.

It is desirable that the plurality of sending arms and the plurality of receiving arms are alternately arranged along the longitudinal direction of the metal plate. According to the reversing device of the present invention, since batch reversal is performed in a state where both side edges of the metal plate are gripped, even if a plurality of metal plates are stacked, the stacked state can be stably maintained during the reversal. No surface flaws occur due to friction between metal plates, and there is no danger of collapse of the load.

[0010]

FIG. 1 shows an example of a preferred embodiment of a metal plate reversing device according to the present invention. Feed side arm 4
The receiving arm 18 is rotatably supported by shafts 5 and 19, respectively. The feed arm 4 includes a movable clamp 1 and a fixed clamp 2 for gripping both side edges of a metal plate P in which one or a plurality of stacked metal plates are stacked, and a feed arm 18 is received from the feed arm 4. Movable clamp 15 for gripping both side edges of the metal plate P
And a fixed clamp 16. The movable clamps 1 and 15 can move on the arms 4 and 18 according to the width of the metal plate P, respectively.

The feed arm 4 includes a rotating shaft 5, a crank shaft
It is attached to a gantry 8 via a piston mechanism 7 and a rotation cylinder 6, and the gantry 8 is fixed on a moving base 9. The moving base 9 is arranged on a rail 13, and a nut 10 fixed in the moving base 9 and a screw 11 rotated by an electric motor 14 constitute a shift mechanism.

As shown in FIG. 3, a plurality of sending arms 4 and receiving arms 18 are usually arranged alternately.
Thus, even when the plate thickness or the stacking thickness is small, the metal plate can be transferred between the arms 4 with the arm 4 and the arm 18 sufficiently close to each other. The device of FIG. 1 operates as follows. First, as shown in FIG. 2 (a), the stacked metal plates P to be inverted are stacked on the feed side arm 4, all the fixed clamps 2 of the feed side arm 4 are clamped, and the movable clamp 1 is The plate P is clamped in contact with the side edge. The loading of the metal plate P on the arm 4 may be performed by a magnet type crane, a crane with a hacker, or the like. Clamping can be most easily performed by a mechanism using a hydraulic cylinder or an air cylinder. FIG. 1 shows a case in which a rodless cylinder is used as a moving mechanism of the movable clamp 1, but a linear motion mechanism may be used.

Next, as shown in FIG. 2 (b), the feed side arm 4 and the receiving side arm 18 are connected to the shafts 5 and 1 respectively.
Rotate 90 ° (rotate clockwise in the figure) around 8.
During this rotation, all the clamps 1 and 2 of the feed-side arm 4 are held (clamped). Fig. 1
In addition to the crank / piston mechanism shown in FIG. Further, in order to stop the rotation operation at 90 °, a method of stopping at the stroke end of the cylinder may be used, or a goniometer may be installed on the rotation shaft 5,
A control method based on the measurement value of the goniometer may be used.

Next, as shown in FIG. 2C, the shift mechanism is operated to bring the feed side arm 4 closer to the receiving side arm 18. As the shift mechanism, a rack and pinion mechanism or the like may be used in addition to the cylinder mechanism shown in FIG. The shift operation is stopped when the distance between the two arms becomes equal to the thickness of the metal plate (stacked bundle). The measurement of the distance between the arms can be performed using an absolute coder, a limit sensor, or the like. In the examples shown in FIGS. 1 and 2,
Although the structure is such that the sending arm is shifted to the receiving arm, the receiving arm may be shifted to the sending arm.

Next, as shown in FIG. 2D, while the movable clamp 1 and the fixed clamp 2 of the feed side arm 4 are held, the movable clamp 15 of the feed side arm 18 is held.
And the fixed clamp 16 is brought into a gripping state. Next, as shown in FIG. 2E, the gripping state of the movable clamp 1 and the fixed clamp 2 of the feed-side arm 4 is released (unclamped). All clamps of the receiving arm 18 are maintained in a gripped state.

Next, as shown in FIG. 2 (f), the sending arm 4 is shifted, and the sending arm 4 and the receiving arm 18 are shifted.
And to the original spacing. All clamps of the receiving arm 18 are maintained in a gripped state. Finally, FIG. 2 (g)
As shown in (2), both arms 4 and 18 are respectively rotated to return to the horizontal state. At this time, the receiving arm 18
The arms 15 are rotated while the clamps 15 and 16 are maintained in the gripping state, and the gripping state is released (unclamped) after the arm becomes horizontal.

[0017]

EXAMPLE A steel plate was inverted by a metal plate inversion device according to the present invention having the structure shown in FIGS. The specifications of the device were as follows. Number of arms: 7 for each of the feed-side arm and the receive-side arm Dimensions of the arm (common to the feed-side arm and the receive-side arm, see FIG. 1, mm) L = 3100 L1 = 2400 L2 = 700 H = 1050 S = 3530 Distance) Shift stroke: Up to 1000 Steel plates to be inverted Width = 600 to 2180 Thickness = 4 mm (one sheet), stacked state 250 mm Length = 3000 to 12500 mm Maximum inverted weight 10 tons Max. Were all inspected on the back side, and the work of returning to the original state was further performed. The work time was compared by reversing one sheet at a time by the conventional method.

[Batch reversal work of 10 sheets according to the present invention] 1) 10 sheets are set on a reversing device by a crane 30 seconds 2) Reversing by a reversing device ...・ ・ ・ ・ ・ ・ ・ 40 seconds 3) Transfer 10 inverted steel plates to the first temporary storage area ・ ・ ・ ・ ・ ・ ・ ・ ・ 30 seconds 4) From the first temporary storage area Lift the first sheet and transfer it to the inspection site ... 30 seconds 5) Backside inspection ... 80 seconds 6 ) Transfer from the inspection site to the second temporary storage site ... 30 seconds 7) Execute 4) to 6) above for the 2nd to 10th sheets ... (30+ 80 + 30) x 10 seconds 8) Transfer from the second temporary storage area to the reversing device ... 30 seconds 9) Re-reversing by the reversing device ... ... 40 seconds 10) Transfer 10 sheets to the original place 30 seconds Total work time = [30 + 40 + 30] x 2 + [30 + 80 + 30] x 10 = 1600 seconds [1 sheet by conventional technology] Each reversing operation] 1) One sheet is lifted by a crane with a magnet and transferred to the reversing place ... 30 seconds 2) Reversal using a crane with a magnet at the reversing place ... 80 seconds 3) Transfer the inverted steel plate to the inspection site ... 30 seconds 4) Back surface inspection ... 80 seconds 5) Transfer to reversal field 30 seconds 6) Re-invert at reversal field (return to face up) 60 seconds 7) Transfer to temporary storage area 30 seconds per sheet 1) to 7) Total time = 340 seconds Total Work = 340 sec / piece × 10 sheets = 3400 seconds Thus the, by using the reversing apparatus of the present invention, 1
When inspecting the back surface of zero stacked steel sheets, the total work time could be reduced to half or less compared to the conventional work in which one steel sheet was inverted one by one. By inverting the side edges of the ten stacked steel plates while clamping them, the stacked state can be kept stable, there is no occurrence of surface flaws due to friction between the steel plates, and there is no danger of collapse of the load. I was able to.

It should be noted that comparing the above examples only with respect to the time for inversion and reinversion, the total time of 1), 2), 5) and 6) × 10 = 2000 seconds in the prior art, whereas the present invention In (1), (2), (8), and (9), the total time is 140 seconds, and the reversing work efficiency is improved by over 14 times by the present invention. Further, in the present embodiment, the number of stacked sheets is ten. However, as is clear from the above formula, as the number of stacked sheets increases, the work efficiency of the present invention becomes more remarkable.

[0020]

As described above, according to the present invention,
Batch reversal of multiple stacked metal plates can be completely prevented by preventing the occurrence of surface flaws and load collapse on the metal plates, greatly improving the efficiency of operations that involve reversing the metal plates, such as inspection of the back surface and care for flaws. can do.

[Brief description of the drawings]

FIG. 1 is a front view of a metal plate reversing device according to the present invention as viewed from a longitudinal direction of a metal plate.

2 (a) to 2 (g) are front views showing respective operation stages of an arm of the metal plate reversing device of FIG. 1;

FIG. 3 is a plan view showing an arrangement of a plurality of arms of the metal plate reversing device of FIG. 1;

FIG. 4 is a perspective view showing a plurality of stacked metal plates.

5 (a) to 5 (f) are front views showing respective operation stages of an arm of a conventional two-arm facing reversing device.

6 (a) to 6 (c) are front views showing each operation stage of a conventional suction-type reversing device.

[Explanation of symbols]

 1… Movable clamp of feed side arm 4 1 ′… Cylinder for clamp operation of movable clamp 1 2… Fixed clamp of feed side arm 4 2 ′… Cylinder for clamp operation of fixed clamp 2 3… Movable clamp 1 Cylinder 4 for moving the feed arm 5 ... Rotating axis of the feed side arm 4 6 ... Cylinder for driving the rotation of the feed side arm 6 '... Rotating pin of the cylinder 6 7 ... Connecting rod (crank) 8 ... Mounting stand 9 ... Move Base 10 ... Nut 11 ... Screw 12 ... Bearing 13 ... Rail 14 ... Electric motor 15 ... Movable clamp 15 'of receiving arm 18' ... Cylinder for clamp operation of movable clamp 15 16 ... Fixed clamp 16 'of receiving arm 18' … Cylinder for operating the clamp of the fixed clamp 16… Cylinder for moving the movable clamp 15… Receiving arm 19… Rotating shaft of the receiving arm 18 20… Receiving Rotation pin 21 ... connecting rod rotary drive cylinder 20 '... cylinder 20 of the arm 18 (crank) 22 ... gantry P ... 1 or more sheets stacked metal plate (steel plate)

Claims (2)

[Claims] 1. A plurality of feed-side arms for holding one or a plurality of stacked horizontal metal plates by rotating them around an axis parallel to the side edges while holding the metal plates at both side edges and holding them on the plate surface. A plurality of receiving means for receiving the upright metal plate from the feed side arm, holding the metal plate at both side edges, holding the plate on the plate surface, and rotating the same in the same direction as the above rotation around an axis parallel to the side edge to make horizontal. Side arm, between the position where the distance between the sending side arm and the receiving side arm in a state where the metal plate is erected is equal to the thickness of the metal plate, and between the position where the distance is larger than the thickness. And a shift mechanism for relatively moving the receiving arm in the horizontal direction. 2. The metal plate reversing device according to claim 1, wherein the plurality of sending arms and the plurality of receiving arms are alternately arranged along a longitudinal direction of the metal plate.