JPS6324966Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pinch roller that bridges and transfers rolled steel material.

As is well known, pinch rollers are used to bridge and transfer steel materials between rolling mills, between rolling mills and cooling beds, etc. The steel material A is sandwiched between the two and transported in a predetermined direction.
At the beginning of use, as shown in FIG. 1, the center O ₁ of the upper roller 1 and the lower roller 2,
The straight line connecting O ₂ is perpendicular to steel A,
In addition, there is a gap between the outer peripheries of the two rollers 1 and 2 that is necessary for the passage of the steel material A, but as the number of days of use passes, both the upper roller 1 and the lower roller 2 are subject to wear and tear. As a result, this interval becomes larger.

Therefore, in the conventional technology, as shown in FIG. 4, the eccentric cylinder 5 into which the upper roller shaft 6 of the upper roller 1 is fitted is rotated within the upper bearing 4 to compensate for the increased distance. The adjustment was made by moving the lower roller shaft 3 of the lower roller 2 upward. However, after this adjustment, the positional relationship between the centers O ₁ ' and O ₂ ' of the upper roller 1 and lower roller 2 is, as shown in Fig. 2, in a horizontal direction from the straight line connecting the original centers O ₁ and O ₂ . The positional deviation occurs because the moving distances of the two are different. That is, since the horizontal position movement distance of the upper roller 1 due to the rotation of the eccentric cylinder 5 and the horizontal position movement distance of O ₂ due to the adjustment of the lower roller 2 are different, the center O ₁ ' and the center after adjustment are different. ′ connecting O ₂ ′ cannot be perpendicular to steel material A, and O ₁ ′ and O ₂ ′ are horizontal distance α
have. For this reason, the steel material A held between the upper roller 1 and the lower roller 2 does not become straight as shown in FIG. 1, but bends upward or downward as shown in FIG. There was a drawback.

To explain this in more detail based on FIGS. 3 and 4, when the upper roller 1 and lower roller 2 have been adjusted at the beginning of use, the straight line connecting their respective centers O ₁ and O ₂ is It is perpendicular to steel material A, and each outer circumferential locus
Contact points T ₁ and T ₂ between C ₁ and C ₂ and steel material A also exist on a straight line. After that, when the gap between the upper roller 1 and the lower roller 2, that is, the gap between the outer circumferential trajectories C1 and C2 becomes larger due to wear of the upper roller ₁ and the lower roller ₂ , the gap is adjusted to be narrower. . This adjustment is as follows for upper roller 1:
As the wear increases, the rotation is moved from the state in Figure 4 A to Figure 4 B and Figure 4 C, but the outer circumferential trajectory
The bottom edge of C ₁ must be adjusted vertically so that it is always at the same height. Therefore, by rotating the eccentric cylinder 5 within the upper bearing 4, the upper roller shaft 6 rotates within the eccentric cylinder 5.
is moved vertically. However, by rotating the eccentric cylinder 5, as is clear from FIG. Move by a maximum horizontal distance of r.

On the other hand, when the lower roller 2 is worn out by the same amount as the upper roller 1, the adjustment is made by rotating around a point O, which is a distance L from the center _O2 of the lower roller 2, as shown in FIG. Since this is performed by rotationally moving in the vertical direction, the horizontal distance moved with respect to the straight line of the center O ₂ is β, which is smaller than the above r. Therefore, a difference in horizontal distance movement occurs by the difference α between β and r.

By this, the center O ₁ ′ of the upper roller 1 after adjustment, the contact point T ₁ ′ between the outer circumferential trajectory c ₁ ′ and the steel material A, the center O ₂ ′ of the lower roller 2 after adjustment, the outer circumferential trajectory C ₂ ′ Steel material A
The contact point T ₂ ' with is no longer on a straight line, resulting in the above-mentioned drawback.

This idea was made in view of the above circumstances, and even after adjustment to deal with the wear of the upper and lower rollers, the center of the upper roller, the contact point between the outer circumferential track of the upper roller and the steel material, and the lower roller The purpose is to enable the lower roller to move so that the center of the lower roller, the outer circumference locus of the lower roller, and the point of contact with the steel material are located on a straight line.

The features of this invention for achieving the above object include: an eccentric cylinder rotatably fitted into an upper bearing fixed to a frame; an eccentric cylinder drive mechanism for rotationally driving the eccentric cylinder; an upper roller shaft rotatably fitted into an eccentric cylinder; an upper roller fixed to the upper roller shaft; an eccentric shaft rotatably held by the frame and extending parallel to the upper roller shaft; an eccentric shaft drive mechanism for rotationally driving the eccentric shaft; a rotating arm having one end rotatably fitted onto the eccentric shaft and the other end being held movable up and down; a vertical movement adjustment mechanism that adjusts the amount of movement; a lower roller shaft that is rotatably fitted into a lower bearing provided on the rotary arm and extends parallel to the upper roller shaft; and a lower roller shaft that is fixed to the lower roller shaft. and a lower roller disposed with a predetermined gap between the upper roller and the lower roller.

According to the above technical means, when the upper roller and the lower roller are not worn, the positioning adjustment of both is performed as follows. In other words, the eccentric cylinder drive mechanism appropriately rotates the eccentric cylinder so that the thinnest part of the eccentric cylinder faces upward, and the eccentric shaft drive mechanism appropriately rotates the eccentric shaft so that the eccentric side of the eccentric shaft faces upward. The rotary arm is made to face one end side or the other end side, and the other end portion of the rotary arm is appropriately moved by a vertical movement adjustment mechanism to rotate the rotary arm by a desired angle around the eccentric axis. As a result, the upper roller shaft rotatably fitted into the eccentric cylinder and the lower roller shaft rotatably held by the rotating arm via the lower bearing are supported at desired positions,
The center of the upper roller, the contact point between the outer periphery of the upper roller and the steel material, the center of the lower roller, and the contact point between the outer periphery of the lower roller and the steel material are arranged in a straight line.

On the other hand, if the upper roller and lower roller are worn out after the above positioning adjustment is performed, the eccentric cylinder drive mechanism rotates the eccentric cylinder from the above state by an angle corresponding to the amount of wear on the upper roller. Then, the upper roller shaft and the upper roller are moved downward by a predetermined distance, and the other end of the rotary arm is moved upward by a distance corresponding to the amount of wear on the lower roller by the vertical movement adjustment mechanism. Move the lower roller upwards by the desired dimension.
In this case, when the eccentric cylinder is rotated via the upper bearing, the upper roller shaft is eccentrically rotated and then stopped and held, but at that point, the center of the upper roller, the upper The contact point between the outer circumferential trajectory of the roller and the steel material, the center of the lower roller,
When the outer periphery of the lower roller and the contact points with the steel material are not aligned in a straight line, the eccentric shaft drive mechanism rotates the eccentric shaft by the desired angle to move the rotating arm and the lower roller to the desired dimensions. If you move it horizontally, the center of the upper roller, the contact point between the outer circumferential trajectory of the upper roller and the steel material, the center of the lower roller, and the contact point between the outer circumferential trajectory of the lower roller and the steel material will be arranged in a straight line. .

As a result, even if wear occurs on the upper roller and lower roller, it is possible to optimally arrange both rollers and adjust the dimensions between the two rollers. Misalignment of the contact points between both rollers and the steel material due to inaccurate adjustment of the rollers and bending of the steel material during transfer due to this can be prevented.

An embodiment of this invention will be described below based on the drawings.

The pinch roller of this invention consists of an upper roller 1 and a lower roller 2 which are rotated facing each other with a predetermined distance apart, as shown in FIGS.

The upper roller 1 is fixed via an upper mounting member 7 to the tip of an upper roller shaft 6 which is rotatably driven within an eccentric cylinder 5 rotatably fitted into an upper bearing 4 fixed to a frame 3. It is. The rotation of the eccentric cylinder 5 within the upper bearing 4 is caused by the engagement between the thread groove 5a of the worm wheel formed on the outer periphery of the eccentric cylinder 5 and the thread groove 8a of the worm of the rotating rod 8 provided in the frame body 3. This is done by rotating a handle 9 fixed to the.

An external fitting member 12 formed at one end of the rotary arm 11 is rotatably fitted onto an eccentric shaft 10 rotatably held in the frame 3, and the eccentric shaft 10 is mounted inside the other end of the rotary arm 11. A lower bearing 14 having a lower roller shaft 13 that is rotationally driven in parallel with the lower roller shaft is fixed. A lower roller 2 is fixed to the tip of the lower roller shaft 13 via a lower mounting member 15 so that the outer peripheral surfaces of the lower roller 2 face each other with a distance corresponding to approximately the thickness of the steel material A from the upper roller 1. . Furthermore, the fifth
As shown in FIGS. 7 and 8, a fluid cylinder 1 fixed below the frame 3 is attached to the tip of the other end of the rotary arm 11.
The tip of the piston rod 16a of No. 6 and the pin connection 17
A protrusion 18 is formed. Further, the protrusion 18 is pressed from above by a lower end head 19a of a rod screw 19 fixed to the frame 3 so as to be movable up and down.

In addition, at the end of the eccentric shaft 10, the eccentric shaft 10
A handle 20 that can be rotated manually is fixed.

When adjusting the positioning of the upper roller 1 when both the upper roller 1 and the lower roller 2 are in a state where they are not worn, the thin wall side of the eccentric cylinder 5 should be directed upward, and the positioning adjustment of the lower roller 2 should be adjusted. When doing so, the eccentric side of the eccentric shaft 10 is directed toward the lower bearing side.

This positioning adjustment of the upper roller 1 can be carried out by rotating the handle 9, so that the threaded groove 8 of the rotary rod 8
This is done by rotating the eccentric cylinder 5 within the upper bearing 4, which has a threaded groove 5a that engages with the threaded groove 5a. or,
The above positioning adjustment of the lower roller 2 is performed using the handle 2.
0 by rotating the eccentric shaft 10. That is, the eccentric shaft 10
This is accomplished by moving the external fitting member 12 and the rotary arm 11, which are externally fitted onto the eccentric shaft 10, forward and backward in the direction of the lower bearing 14 as the eccentric shaft 10 rotates. Further, the distance between the opposing outer peripheral surfaces of the upper roller 1 and the lower roller 2 is adjusted by rotating a rod screw 19 fixed to the frame 3 and moving it up and down. this is,
A protrusion 18 fixed to the lower bearing 14 moves from the bottom to the top of the piston rod 16a of the fluid cylinder 16.
Since the rod screw 19 is always energized by
This is because the lower bearing 14 moves up and down about the eccentric shaft 10 due to the up-and-down movement of. Hereinafter, with reference to the above-mentioned FIG.
O ₁ , contact point between upper roller outer circumferential trajectory C ₁ and steel material A
T ₁ , the center O ₂ of the lower roller 2, and the contact point T ₂ between the outer circumferential trajectory C ₂ of the lower roller and the steel material A are each on a straight line.

Next, when the upper roller 1 and the lower roller 2 are worn out, this distance becomes larger than the thickness of the steel material A, so the respective rollers 1,
2 must be moved toward each other so that the distance between them is appropriate. At this time,
The upper roller 1 is adjusted downward by the same operation as described above, but in conjunction with this, the center O ₁ of the upper roller 2 moves horizontally to the maximum r, and O ₁ ' Move to. On the other hand, lower roller 2
is moved upward relative to the frame 3 by rotating the rod screw 19. By this, the lower end head 1
As 9a moves upward, the lower bearing 14 moves upward about the eccentric shaft 10 due to the bias of the fluid cylinder 16. At this time, the center O ₂ of the lower roller 2 fitted in the lower bearing 14 moves horizontally up to the maximum β and moves to O ₂ ' as it moves upward, but since r and β are not equal, The horizontal movement distances of O ₁ and O ₂ are not equal. In order to adjust this to be equal, the eccentric shaft 10 is rotated using the handle 20, and the lower roller 2 is horizontally moved via the outer fitting member 12, the rotating arm 11, the lower bearing 14 and the lower roller shaft 13. It moves it.

As a result, the center O ₁ ′ of the upper roller 1, the contact point T ₁ ′ between the upper roller outer circumference trajectory C ₁ ′ and the steel material A, the center O ₂ ′ of the lower roller 2, the lower roller outer circumference trajectory C ₂ ′ and the steel material A As a result, the contact points T ₂ ' with the steel material A are located on the same straight line, and as a result, the above-mentioned drawbacks of the prior art can be avoided, namely, the vertical movement of the steel material A due to the shift of the contact point with the steel material A due to wear of the upper roller 1 and the lower roller 2. This makes it possible to prevent the disadvantage of bending in the direction.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams of a conventional pinch roller, and FIGS. 5 to 8 are explanatory diagrams of the pinch roller of this invention, and FIG. 5 is a partially omitted longitudinal sectional view.
Figure 6 is a partially omitted sectional view taken along the - line in Figure 5;
The figure shows a partially omitted cross-sectional view along the line - in FIG. 5, and FIG. 8 shows a partially omitted cross-sectional view along the line - in FIG. 1... Upper roller, 2... Lower roller, 3... Frame,
4... Upper bearing, 5... Eccentric cylinder, 5a, 8, 8a,
9... Eccentric cylindrical drive mechanism (thread groove, rotating rod, thread groove, handle), 6... Upper roller shaft, 10... Eccentric shaft, 11... Rotating arm, 12... External fitting member, 13... Lower roller shaft, 14... Lower part Bearing, 16, 19...Vertical movement adjustment mechanism (fluid cylinder, bar screw), 20...
Eccentric shaft drive mechanism (handle).

Claims (1)

[Scope of utility model registration request] an eccentric cylinder rotatably fitted into an upper bearing fixed to a frame; an eccentric cylinder drive mechanism for rotationally driving the eccentric cylinder; an upper roller shaft rotatably fitted into the eccentric cylinder; an upper roller fixed to the upper roller shaft; an eccentric shaft rotatably held by the frame body and extending parallel to the upper roller shaft; an eccentric shaft drive mechanism for rotationally driving the eccentric shaft; a rotary arm that is rotatably fitted onto the eccentric shaft and whose other end is held movable up and down; a vertical movement adjustment mechanism that adjusts the amount of vertical movement of the other end of the rotary arm; A lower roller shaft is rotatably fitted into the provided lower bearing and extends parallel to the upper roller shaft, and the upper roller is fixed to the lower roller shaft. A pinch roller comprising: a lower roller;