JPS6219245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a markless drum for a winder/unwinder used in metal rolling equipment, finishing equipment, etc.

The winding cylinder or drum of the winding/unwinding machine used in the above-mentioned equipment has a predetermined dimension determined based on the internal diameter size standard of the product coil. During coil winding, the coil winding force applied to the drum surface can reach tens of thousands of tons, and the drum is a component that can withstand this winding force and has the necessary contraction function to extract the coil. must be kept within these limited dimensions. For this reason, there are technical issues that must be resolved in the future, and one such issue is preventing segment marks on drums. Segment marks are the end face shapes of a and b that occur in several of the coil layers to be wound when stepped edges a and b of the segment 2 shown in FIG. 1 are formed. If this mark is deep, the coil section becomes defective and is discarded, but the amount of coil parts produced in one rolling mill ranges from several hundred tons to several thousand tons per year, resulting in a significant decrease in yield. In order to prevent this, drums shown in FIGS. 1 and 2 have conventionally been used.

That is, the winding drum shaft 1 is held by a rolling bearing 8 supported by a casing 9, and is directly connected to a drum driving device (not shown) for rotation. On the outermost periphery of the drum, there is a segment 2 which is divided into four parts and has an arc-shaped outer periphery, and a metal plate is wound around the outer periphery of this segment 2 to form a coil. The segment 2 is constantly pushed down toward the winding drum shaft 1 by a spring 11 at its center, and is held in place by an upper wedge 6 and a lower wedge 5. The upper wedge 6 and the lower wedge 5 are in wedge contact, and the lower wedge 5 is connected via a connector 4 to a piston rod 3 and a hydraulic cylinder (not shown). Note that 7 is a header provided on the end surface of the drum, and 10 and 12 are spring mounting seats for the spring 11.

Piston rod 3 with hydraulic cylinder (not shown)
When is actuated in the axial direction, the lower wedge 5 is also actuated in the axial direction, and the upper wedge 6 moves in the radial direction of the drum (direction c in FIG. 1). Therefore spring 11
As a result, the segment 2 pressed against the upper wedge 6 expands and contracts in the radial direction. When the drum is expanded, the outer peripheries of the segment 2 and the upper wedge 6 are integrally circular as shown in FIG.
Segment marks do not occur.

However, when the drum tightening force increases, the following drawbacks occur. That is, a large seaming force is applied to the outer periphery of the segment 2, and this seaming force is transmitted to the lower wedge 5, but the sliding part between the end of the segment 2 and the upper wedge 6 and the area between the upper wedge 6 and the lower wedge 5 are The contact area is small and cannot withstand high seaming force. Also, segment 2 is supported by upper wedge 6.
Since only the outer end of the segment in the circumferential direction is held by the segment 2, bending stress is generated in the segment 2, resulting in a bent structure as shown in Fig. 1(d).
This also makes it impossible to withstand high seaming force.

For this reason, the range of use of conventional drums of this kind has been limited to those with relatively light loads.

SUMMARY OF THE INVENTION An object of the present invention is to improve the drawbacks of conventional markless drums, to provide a markless drum that can withstand high seaming forces, has sufficient rigidity, and does not generate segment marks.

In order to achieve the above object, the present invention includes a segment that is divided into a plurality of segments and whose outer periphery is formed into a circular arc shape, a hollow shaft that supports one end of this segment in the axial direction and is rotatably provided, and this hollow shaft. A winding drum shaft is inserted through the inside of the segment, and its outer peripheral surface is in wedge-like contact with the inner peripheral surface of the segment over almost the entire area, and the winding drum shaft slides in the axial direction with respect to the segment. A slide key member commonly engaged with both the inner circumferential side of the segment and the outer circumferential side of the winding drum shaft so as to be able to slide in the axial direction by being guided by a groove formed in the winding drum shaft. a lower wedge member, the outer surface of which is in wedge contact with the outer surface of the lower wedge member, is guided by the groove formed in the winding drum shaft, and is located at approximately the same position as the end surface of the adjacent segment; an upper wedge member disposed between the segments so as to allow the winding to move, and a rod disposed through the winding drum shaft, the end of which is fixed to the end of the lower wedge member via a connecting member. By providing a drive device that is attached to the winding drum and the other end of the rod and moves the winding drum shaft and the rod in the axial direction, when the winding drum is expanded, the segment outer periphery and the upper wedge member outer periphery can be moved. This is a markless drum of a winding/unwinding machine that can form a circular arc surface with no steps.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5. In the figure, reference numeral 21 denotes a segment that is divided into four pieces and whose outer periphery is formed into a circular arc shape. One end of this segment 21 is supported by a hollow shaft 22, and the hollow shaft 22 is a rolling bearing provided in a casing 23. It is rotatably supported by 24. Reference numeral 25 indicates a winding drum shaft through which the hollow shaft 22 is inserted, and whose outer peripheral surfaces are wedged in contact with the inner peripheral surface of the segment 21 over almost the entire area; It slides within the groove 46 extending in the axial direction formed on the inner peripheral side of the segment 21 so as to be able to slide,
The winding drum shaft 2 is arranged so that it can move together with the winding drum shaft 25.
a slide key fixedly engaged with the outer circumferential side of 5;
27 is a lower wedge serving as a sliding member that is slidably guided by a groove formed on the winding drum shaft 25; 28 is in contact with the lower wedge 27 in a wedge state; This is an upper wedge that serves as a vertically movable member that is guided by a groove and located on the end faces of adjacent segments 21. 29 is the winding drum shaft 2
Rods 31 and 3 pass through the center of 5 and have one end fixed to the lower wedge 27 via the connector 30.
2 is a cylinder formed in two stages at the other end of the hollow shaft 22; the piston 33 of the winding drum shaft 25 is inserted into the cylinder 31, and the piston 34 of the rod 29 is inserted into the cylinder 32; 34
By operating the winding drum shaft 25 and rod 29
moves in the axial direction. The cylinder 31 is formed to have a larger diameter than the cylinder 32 in order to withstand a large load. 35 is an electromagnetic switching valve for switching the pressure oil for operating the pistons 33 and 34, and 36 is a header provided on the end surface of the winding drum shaft 25. When the winding drum is expanded, the outer circumference of the segment 21 and the outer circumference of the upper wedge 28 form a perfectly circular arcuate surface with no step.

Next, drum expansion during coil winding will be explained. The piston position in FIG. 5 shows the state of drum expansion. That is, in this state, the electromagnetic switching 35 is ()
Pressure oil is supplied from the right side of each of the cylinders 31 and 32, and the pistons 33 and 34 are respectively moved to the left in the axial direction. When the piston 33 moves to the left in the axial direction, the winding drum shaft 2 is integrated with the piston 33.
5 moves to the left, so that the segment 21, which is in wedge-like contact with the winding drum shaft 25 and is always in contact with the outer circumferential surface of the winding drum shaft 25 over almost the entire area of its inner circumferential surface, has a radius of Expand in the direction. On the other hand, when the piston 34 moves to the left in the axial direction, the rod 29 that is integral with the piston 34 and the connector 3
0, the lower wedge 27 moves to the left in the axial direction. For this reason, the upper wedge 2 in wedge contact with the lower wedge 27
8 expands in the radial direction, and adjacent segments 2
The upper wedge 28 is pressed against the end face gap of 1.
At this time, the segments 21 and the upper wedge 28 form a perfectly circular drum with no irregularities. However,
If the drum is rotated via the hollow shaft 22 by a drive device (not shown), a drum without segment marks can be obtained.

In the drum expanded state, the winding force by the coil is transmitted from the segment 21 to the winding drum shaft 25 through the wedge surfaces e and f in FIG.
It is opposed to the force due to the pressure oil from the right side of 3. Although the upper wedge 28 is subjected to a winding force from the outer peripheral surface of the upper wedge 28, the winding force from the segment 21 is very small.
Therefore, the load applied to the upper wedge 28 and the lower wedge 27 is small, compared to the conventional example shown in FIG.
It is reduced to about 1/10.

Furthermore, the contact surfaces e and f between the segment 21 and the winding drum shaft 25 are always in wedge-like contact with the outer peripheral surface of the winding drum shaft 25 over almost the entire area of the inner peripheral surface of the segment 21. The area of surfaces e and f is 4 to 5 times larger than that of the conventional example shown in FIG. No bending stress is generated in the segment 21.

The expansion of the drum and the action of the seaming force have been explained above, but the contraction of the drum operates in the exact opposite way. That is, when the solenoid switching valve 35 is switched to (), the cylinder 3
Pressure oil is supplied from the left side of each of pistons 1 and 32, the pistons 33 and 34 operate to the right in the axial direction, and the drum components operate in the opposite direction to the expansion, resulting in the contracted state shown in the lower half of FIG.

According to this embodiment, the actuating piston devices of the winding drum shaft and rod are provided at each end, so that it can be made compact.

According to the present invention, it is possible to obtain a markless drum that can withstand high seaming force, has sufficient rigidity, and does not generate segment marks, and can be used for winding equipment such as metal rolling equipment or finishing equipment that generates high seaming force.・It has the effect of being able to be used as an unwinding machine.

[Brief explanation of the drawing]

FIG. 1 is a radial sectional view of a conventional markless drum, FIG. 2 is a sectional view taken along line AA in FIG. Figure 4 is a sectional view taken along line B-B in Figure 3, and Figure 5.
The figure is a sectional view showing the axial drive portion of FIG. 4. 21... Segment, 22... Hollow shaft, 25... Winding drum shaft, 26... Slide key, 27... Lower wedge, 28
...upper wedge, 29...rod, 33,34...piston.

Claims (1)

[Claims] 1 A segment that is divided into a plurality of parts and has an arc-shaped outer periphery, a hollow shaft that supports one end in the axial direction of this segment and is rotatably provided, and a segment that is inserted through the hollow shaft, and that is A winding drum shaft whose outer peripheral surface is wedged in contact with the inner peripheral surface over almost the entire area, and a winding shaft that is connected to the inner peripheral side of the segment so that the winding drum shaft can slide in the axial direction with respect to the segment. a slide key member commonly engaged with the outer peripheral side of the drum shaft; a lower wedge member that is slidable in the axial direction guided by a groove formed in the drum shaft; and an outer surface of the lower wedge member. The segments are arranged between the segments so that they are in wedge contact with each other, are guided by the groove formed in the winding drum shaft, and have their outer surfaces located at substantially the same position as the end faces of the adjacent segments. an upper wedge member; a rod that is disposed through the winding drum shaft and whose end is fixed to the end of the lower wedge member via a connecting member;
A markless drum for a winding/unwinding machine, comprising a drive device attached to the other end of the winding drum shaft and the rod, respectively, for moving the winding drum shaft and the rod in the axial direction.