JPH0224486Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention relates to a roller leveler.
More specifically, it relates to a roller leveler whose rolls can be easily replaced.

[Prior Art] Fig. 1 shows a conventional roller leveler, in which a shows a lower frame, b shows a lower roll group supported by an axle box c, d shows an upper frame, and e shows a group of lower rolls supported by an axle box f. Upper roll group, g is a worm disposed on the lower frame a, h is a worm wheel rotated by the worm g, i is a screw shaft that moves up and down with the rotation of the worm wheel h, and the screw shaft i is attached to the upper frame d. The upper frame d is engaged with the upper frame d via the block 1, and can move up and down and tilt the upper frame d. Also, a spring j is provided between the upper frame d and the lower frame a to balance the upper frame, and by pushing up the upper frame d with the spring j, the looseness of the screw shaft i is eliminated. .

Further, as a conventional roller leveler, there is also a type in which the upper frame is not engaged with the screw shaft as described above, but is lifted by a cylinder from a gate-shaped frame.

[Problems to be solved by the invention] However, in the former of the roller levelers mentioned above, since the axle box f supporting the upper roll group e is fixed to the upper frame d by bolts and nuts k, When replacing the upper roll group e, it is necessary to remove a large number of bolts and nuts k and remove the axle box f that supports the upper roll group e from the upper frame d.
Therefore, there is a problem that the roll replacement work is difficult and time-consuming, and in the latter case, it is important to note that the axle box that supports the upper roll group is fixed to the upper frame with a large number of bolts and nuts. This roller leveler is the same as the roller leveler shown in FIG. 1, and like the roller leveler shown in FIG.

In view of the above-mentioned viewpoint, the present invention aims to provide a roller leveler that allows roll replacement to be performed easily and quickly.

[Means for Solving the Problems] The present invention consists of a lower roll group rotatably supported by a lower axle box disposed below the frame window, and an upper axle box disposed in the frame window portion so as to be movable up and down. a vertically oriented screw shaft which is disposed above the upper shaft box and whose lower end can come into contact with the top surface of the upper shaft box so as to support the reaction force during straightening of the steel plate, and a frame. A lifting device is provided below the window so as to sandwich the lower axle box from the front and rear in the direction of steel plate movement, and is capable of lifting and lowering the upper axle box to press the screw shaft.

[Function] When straightening the plate, the upper shaft box is pressed against the screw shaft by the push-up device, so there is no need to fix the upper shaft box to the frame with bolts and nuts. In addition, there is no need to raise and lower the screw shaft, and rolls can therefore be replaced easily and quickly.

[Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 2 shows an embodiment of the present invention, in which a lower shaft box 4 with a lower roll group 3 pivotally attached is fitted into a lower recess of an integrated frame 2 having a window portion 1 so that it can be pulled out laterally. window part 1 of frame 2.
An upper shaft box 7 with an upper roll group 6 pivotally attached thereto is fitted so that it can be pulled out laterally. Further, the upper surface of the upper shaft box 7 is in contact with the lower end of the screw shaft 5, which is attached to a gate-shaped frame (not shown) so as to be able to rise and fall freely. It is designed to be able to tilt. Furthermore, a push-up device 8 is disposed below the window portion 1 so as to sandwich the lower axle box 4 from the front and back in the steel plate advancing direction. By fitting the piston 10 which can be raised and lowered and raising the piston 10,
The upper shaft box 7 can be pushed upward to position the upper shaft box 7 and eliminate rattling of the screw shaft 5.

When correcting the shape of a steel plate, the screw shaft 5 is raised and lowered by a drive device (not shown), and the piston 10 of the push-up device 8 is raised.
0, press the upper shaft box 7 against the screw shaft 5 and press the upper shaft box 7.
At the same time, the gap between the upper and lower roll groups 6 and 3 is held in a predetermined state, and the steel plate is passed between the upper and lower roll groups 6 and 3 for straightening.

When replacing the upper and lower roll groups 6 and 3, the screw shaft 5 is not raised or lowered, but is stopped, and the piston 10 of the push-up device 8 is lowered to lower the upper shaft box 7. 7 is supported by a reassembly jig set in advance on the lower axle box 4, and then, with the upper and lower roll groups 6 and 3 still attached, the upper and lower axle boxes 7 and 4 are moved laterally to rolls (not shown). Pull out using a recombination device. The upper shaft box 7 and the frame 2 are not fastened together with bolts and nuts, and the screw shaft 5
Since there is no need to raise and lower the rolls, rolls can be changed easily and quickly. Note that a balance spring may be provided between the lower end of the window portion 1 of the frame 2 and the upper axle box 7 to reduce the pushing up force of the pushing up device 8.

FIG. 3 shows another example of the lifting device 8 for balancing the upper axle box 7 used in the present invention, in which a rod 12 with a large diameter at the top is inserted into a hollow hole 11 provided on the lower surface of the window portion 1 of the frame 2. This is an example in which a spring 13 that is fitted in a vertically movable manner and urges the rod 12 upward in the hollow hole 11 is housed so as to surround the small diameter portion of the rod 12. In the figure, 14 indicates a nut.

Even in this case, the upper shaft box 7 is pressed against the screw shaft 5 when straightening the steel plate. Also, when replacing the roll, leave the screw shaft 5 stopped and insert the nut 14 into the frame 2.
The rod 12 is lowered by contacting the lower surface of the rod and rotating, thereby lowering the upper axle box 7 and supporting it on the reassembly jig set on the lower axle box 4. The rearrangement device pulls out the upper and lower shaft boxes 7 and 4 laterally with the upper and lower roll groups 6 and 3 attached.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effect of the invention] According to the roller leveler of the invention, bolts and
No nuts are used, and the upper shaft box is pushed up by the required push-up device and brought into contact with the screw shaft, so there is no need to attach or remove bolts and nuts or raise and lower the screw shaft when replacing the roll group. Therefore, an excellent effect can be achieved in that the roll can be replaced easily and quickly.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional roller leveler, Fig. 2 is an explanatory diagram of an embodiment of the roller leveler of the present invention, and Fig. 3 is an explanatory diagram of another example of the push-up device used in the roller leveler of the present invention. It is a diagram. In the figure, 2 is the frame, 3 is the lower roll group, 4 is the lower shaft box, 5 is the screw shaft, 6 is the upper roll group, 7 is the upper shaft box,
8 indicates a push-up device.

Claims (1)

[Scope of utility model registration request] A lower roll group rotatably supported by a lower axle box disposed below the frame window, an upper roll group rotatably supported by an upper axle box disposed movably up and down in the frame window, and an upper axle group. A vertically oriented screw shaft is placed above the box and the lower end can contact the top surface of the upper box to support the reaction force when straightening the steel plate, and the lower box is placed below the window of the frame from the front and back in the direction in which the steel plate advances. A roller leveler characterized by being provided with a lifting device that is arranged to sandwich the upper shaft box and that can be raised and lowered to press the upper shaft box against the screw shaft.