JP2500250Y2 - Fixing device for rolling mill roll and chock - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chock fixing device for enabling labor saving and automatic mechanization when attaching and detaching a chock to and from a rolling mill roll.

[0002]

2. Description of the Related Art When the rolls of a rolling mill are worn or the size of the steel material to be rolled is changed and the rolls are replaced, the chocks are replaced between the replacement rolls. Since the rolls are changed frequently, the shared chock is also frequently attached and detached. If the frequency of roll replacement increases, productivity will be affected, so it is necessary to keep the chock replacement time short. For this reason, a number of proposals have been made in the past for mechanical attachment / detachment devices for a chock using a moving carriage or the like in order to save line stop time and save labor (for example, Japanese Patent Publication Nos. 52-47414 and 5).
9-13285, JP-B-60-38204, JP-B-59-27926, JP-B-60-56103).

By the way, when attaching or detaching the chock, it is necessary to attach or detach a component to which the chock is fixed in advance, for example, a thrust ring or a nut ring (also referred to as an adjust ring). FIG. 5 is a typical arrangement configuration example of each of these parts that fixes the chock to the roll neck portion. In this figure, a chock 5 is fitted to a roll neck portion 2 of a roll 1 via bearings 3 and 4, and this chock 5 is fitted into an annular groove 6 of a roll shaft end 1A. The thrust ring 12A, the screw ring 30 pressing the thrust ring 12A through the detent 32,
The chock 5 is fixed and supported by a nut ring 31 screwed onto the chock 5. 33 is a rotation stopper. As shown in FIG. 6, the thrust ring 12A is formed in two splits, is joined at one place by a pin 34, and is connected at a facing position by a fastening bolt 35 to form an annular thrust ring 12A.

The procedure for pulling out the chock in the conventional chock fixing device of FIG. 5 is to remove the detent 32 with the thrust ring 12A. Thrust ring 12A by loosening screw ring 30
Release the crimping force against. This screw ring 30
Conventionally, as a means for loosening, a manual work using a jig has been mainly used, and a pinion of a separately provided rotation motor device is engaged with the teeth formed on the outer peripheral surface of the screw ring 30 to rotate the teeth. There are also examples (for example, the above Japanese Patent Publication Sho 52
-47414, Japanese Examined Patent Publication No. 60-38204, Shokai No. 6
0-56103). The fastening bolt 35 of the thrust ring 12A is removed, and the thrust ring 12A is removed from the annular groove 6 at the roll shaft end. The thrust ring 12A is hung by a crane or the like and manually attached and detached by an operator. The nut ring 31 and the screw ring 30 are pulled out from the roll shaft in a set state. Pull out the chock 5 together with the bearings 3 and 4 from the roll 1. When the chock is mounted, after the chock 5 is fitted onto the roll 1 together with the bearings 3 and 4 by the procedure reverse to the above,
After fixing the thrust ring 12A, the nut ring 31 for tightening the bearing box is rotationally tightened to prevent rotation.

[0005]

[Problems to be solved by the invention] As described above,
Positioning, installation, and removal work for attaching a detent with a thrust ring, and the removal of the thrust ring fastening bolts and removal of the thrust ring while hanging with a crane etc. are all manual work, which saves labor and automates the roll shop. It is a big obstacle above. Further, although the work of tightening or loosening the screw ring is partially mechanized by a rotary motor or the like, the device is complicated and large-scaled, and its operation is complicated and lacks promptness. Although it is somewhat useful in terms of labor saving, it does not contribute much to the efficiency of chocks attaching and detaching work. On the contrary, the device becomes complicated and large in size, and the cost of the entire chock attachment / detachment device is high. Since the above-mentioned series of work involves complicated work steps and many delicate manual work, the screw ring and the nut ring can be attached and detached as a unit, but the thrust ring is attached and detached separately from these, and these parts are also attached to the chock. Since it is not attached, it is a labor-saving work for chocks and is an obstacle to automation and mechanization.

There is a roll shaft end processed to facilitate the attachment and detachment of the thrust ring (see Japanese Utility Model Laid-Open No. 2-38105), but it cannot be applied without changing the shape or function of the roll or chock. On the contrary, replacement costs are high and there is little merit.

An object of the present invention is to provide a chock fixing device capable of automatically and mechanically carrying out a series of these works with one touch in order to shorten the work time for changing the chock.

[0008]

In order to achieve the above-mentioned object, the present invention provides a chock fitted on a roll neck portion of a rolling mill roll via a bearing and a thrust stopper in an annular groove portion of the roll neck end portion. A device for fixing by fixing, wherein the thrust stopper is formed in a block shape and arranged at a plurality of positions in the annular groove portion, and a cotter for fixing the thrust stopper by pressing it to the annular groove portion is provided, while a chock and a cotter are provided. A spacer ring externally fitted to the roll neck portion is interposed between them, and a cotter attachment / detachment lever is provided on the spacer ring, and the cotter is slidably guided to the spacer ring by the action of the attachment / detachment lever to move up and down. The cotter is configured to be movable, and the cotter is provided with a hook portion for lifting the thrust stopper together. It is a device.

[0009]

[Function] The cotter is moved up and down by one-touch opening / closing operation of the cotter attaching / detaching lever, and the chock is fixed or unfixed by applying or releasing the pressing force to the thrust stopper, and at least these cotters,
The lock mechanism of the thrust stopper is attached to the spacer ring, and when the chock is attached and detached, it is attached and detached as a unit, so the attaching and detaching work is greatly improved, and the work is automated and mechanized with a simple configuration. Can be achieved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a chock mounted on a roll shaft and a fixing device thereof, FIG. 2 is an enlarged view of the fixing device, FIG. 3 is a sectional view of a guide part of a cotter, and FIG. It is a principal part front view seen from the shaft end direction. As shown in these figures, the roll 1 is rotatably supported by a chock 5 via a roller bearing 3 and a thrust bearing 4. A step is provided at the end of the roll 1 to form a roll neck portion 2, and an annular groove 6 is formed at the roll shaft end 1A. A neck ring 7 is attached to the step portion between the roll 1 and the roll neck portion 2, and a chock 1 is externally fitted to the outer surface of the roll neck portion 2 via a thrust bearing 4.
Reference numeral 4a indicates a bearing inner ring of the thrust bearing 4. A press ring 8 is fixed to the end surface of the chock 1. The left side of the chock 1 abuts the thrust bearing 4 in FIG. 1, and spacer ring receivers 9 are provided on the right side at a plurality of positions (as shown in FIG. 4). (4 places in the circumferential direction in the embodiment). The spacer ring receiver 9 is locked in an engagement groove 11a formed by a pair of collars 11 provided on the outer peripheral surface of the spacer ring 10 described later.

On the other hand, as shown in FIG. 3, the annular groove 6 is provided with block-shaped thrust stoppers 12 at a plurality of locations (two locations at the top and bottom in this embodiment). As shown in FIGS. 1 and 2, the cross section of the thrust stopper 12 is such that the right surface is a vertical surface that can be pressed against the wall surface 6a of the annular groove 6, and the left surface is a tapered surface 12a that is pressed by a cotter 13 described later.
Is formed. A spacer ring 10 is externally fitted to the roll neck 2 between the thrust bearing 4 and the cotter 13. As described above, the end of the spacer ring receiver 9 is locked in the engaging groove 11a formed in the spacer ring 10, and when the chock 5 is pulled out from the roll shaft or mounted on the roll shaft. Time,
With the spacer ring 10 still attached to the chock 5,
Further, the cotter 13 and the thrust stopper 12 attached to the spacer ring 10 can be simultaneously pulled out or attached. However, omitting the spacer ring receiver 9, the chock 5 and the spacer ring 1
Fixing mechanism L including 0 (cotter 13 and thrust stopper 1
Needless to say, it may be configured such that it can be attached and detached separately from (including 2 etc.).

In the above construction, as shown in FIG. 1, the thrust force A is transmitted and supported by the chock 5 via the roll 1, the neck ring 7 and the thrust bearing 4, and the thrust force B is transmitted to the roll shaft end 1A and the thrust. It is similarly transmitted to and supported by the chock 5 via the stopper 12, the cotter 13, the spacer ring 10 and the thrust bearing 4.

Next, the cotter type chock fixing mechanism L will be described in detail with reference to FIG. A bracket 14 is fixed to the outer surface of the spacer ring 10, and a cotter attaching / detaching lever 16 is rotatably supported by a pin 15 on the bracket 14. As shown in FIG. 4, the attachment / detachment lever 16 is composed of a pair of left and right levers, and a lever pin 17 is installed at the tip of the left and right attachment / detachment levers 16 so as to horizontally connect them. For example, when the arm E attached to the roll exchanging truck is hooked on the lever pin 17 and lifted, the attachment / detachment lever 16 swings and displaces from the lock position L1 to the unlock position L2 with the pin 15 as a fulcrum.

On the other hand, the annular groove 6 at the end of the roll neck 2
A cotter 13 is interposed between the thrust stopper 12 and the spacer ring 10 provided on the vehicle. The lower portion of the cotter 13 is composed of a pressing portion 13a and a hooking portion 13b, and its cross section is formed in a substantially inverted U shape so as to surround the thrust stopper 12. The pressing portion 13a is formed in a wedge shape on both sides, and a guide groove 13c is formed on one surface as shown in FIG.
The spacer ring 10 is fitted and slidably contacted with a guide 18 formed in a tapered shape on the end surface of the spacer ring 10. Therefore, the cotter 13 can move up and down along the guide 18 in the diagonal D direction.
The reason for moving the cotter 13 up and down diagonally in this way is that the surface pressure acting on the tapered surface 12a of the thrust stopper 12 has a small force component in the falling direction because the thrust stopper 12 is formed in a block shape. This is so that the thrust stopper 12 acts in the direction in which it is pressed into the annular groove 6. On the other hand, the other surface of the cotter 13 is slidably contacted with the tapered surface 12a of the thrust stopper 12 described above, and the thrust stopper 12 is pressed through this surface to be pressure-bonded to the annular groove 6 portion. That is, the lock position L1
In the above, the cotter 13 is pressed by the spring force of the cotter presser 19 built in the attachment / detachment lever 16, and the block-shaped thrust stopper 12 is pressed and fixed to the annular groove 6 portion. The catching portion 13b of the cotter 13 has a built-in stopper retainer 20 that projects by the elastic force of the spring 20a. The tip of the stopper presser 20 (provided with a roller) enters into the recess 12b of the thrust stopper 12 (the hook 12c is formed on the upper portion at the same time), and the upper surface of the stopper presser 20 and the lower surface of the hook 12c are connected. A gap δ is provided between them. When the cotter 13 moves upward by the distance of this gap, the thrust stopper 12 is pushed by the stopper retainer 20 so that the gap δ is formed in the annular groove 12.
This is for releasing the pressure from the wall surface 6a and enabling smooth attachment and detachment. Further, the cotter 13 has an extended portion 13d that is connected upward from the pressing portion 13a,
A cotter pull-out pin 21 is provided on the upper end of the extending portion 13d so as to project in the left-right horizontal direction.
6 is abutted on the upper surface of 6 to be hooked.

A holding roller 22 is provided on the outer surface of the spacer ring 10 in the vicinity of the bracket 14 in a protruding state by being urged by a spring 22a to press the base end portion of the detachable lever 16. This is the unlock position L2
To hold. In addition, near the lever pin 17 at the tip of the attachment / detachment lever 16, a stopper 23 of the attachment / detachment lever 16 is pivotally mounted about a pin 23c. The stopper 23 is a lock mechanism when the attachment / detachment lever 16 is in the lock position L1, and hooks the member 10a protruding from the spacer ring 10 and holds it by the spring 23a. When the arm E pushes the roller 23b provided at the upper end of the detent 23, the detent 23 rotates and the lock is automatically released.

Now, in the above structure, the thrust stopper and the like are attached and detached in the following manner (see FIG. 2).

When the recessed portion of the arm E is fitted into the lever pin 17 at the tip of the detachable lever 16, the roller 23b of the disengagement stopper 23 is pushed and rotated around the support shaft 23c to lock the spacer ring 10. It comes off from 10a. By grasping the lever pin 17, the detachable lever 16 is pivoted upward from the lock position L1 to the unlock position L2 with the pin 15 as a fulcrum. Then, the attachment / detachment lever 16 engages with the pull-out pin 21 with the cotter to pull out the cotter 13 in the oblique D direction along the guide 18. At this time, cotter 13
Is slightly moved in the pull-out direction by a gap δ, the stopper retainer 20 installed in the cotter 13 pushes the thrust stopper 12 in the axial direction by the spring force to release the pressure contact with the wall surface 6a of the annular groove 6, and the thrust stopper 12
The hanging portion 12c is hooked and the thrust stopper 12 is lifted together and moved to the unlock position L2. At the unlocked position L2, the lever holding roller 22 holds the detachable lever 16 in the unlocked state by the spring 22a. The stopper retainer 20 is a mechanism for smoothly pushing the thrust stopper 12 toward the cotter side by a spring 20a so that the thrust stopper 12 can be smoothly inserted into and pulled out from the groove, and at the same time, holds the thrust stopper 12 on the cotter 13 in an unlocked state. It has a function as a hook for.

The operation of the attaching / detaching lever 16 is automatically performed by grasping and opening / closing the lever pin 17 with the arm E provided in the chock attaching / detaching device (or the roll exchanging carriage or the like). Further, during the unlocking operation, the disengagement stopper 23 is automatically disengaged by being rotated by being pushed by the arm E as described above, and when the arm E is disengaged when being locked, the disengagement stopper 23 is reversely rotated to the original state by the spring force. And the lever 16 is locked. In this manner, the thrust stopper or the like that fixes the chock can be easily released with one touch by raising or lowering the attachment / detachment lever, or can be put in the fixed state, so that the work of attaching / detaching the chock is greatly improved.

Further, the chock is attached and detached while the thrust stopper 12 is in the unlock position L2, but the lock mechanism including the cotter 13, the thrust stopper 12 and the like is all attached to the spacer ring 10. Moreover, since the spacer ring 10 is supported on the chock side of the spacer ring receiver 9, when the chock is pulled out from the roll shaft, the fixing mechanism L including the spacer ring 10 is fixed.
Will be attached to and detached from the roll while still attached to the chock.

[0020]

The present invention has a cotter type chock fixing mechanism, and the lock of the roll and chock can be released with one touch by opening and closing the attachment / detachment lever. There is no need to add an extra complicated device to unlock the screw ring, etc., and it can be configured so that all parts can be attached and detached while attached to the chock (at least the thrust stopper and spacer ring are integrated) Therefore, the work of attaching and detaching the chock can be simplified, the time can be shortened, and the labor can be saved, and the automation and mechanization of the work of attaching and detaching the chock in the roll shop can be realized.

Further, the present apparatus can be applied without changing the shapes and functions of the conventional roll and chock, and the cost for replacement can be minimized.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing a chock mounted on a roll shaft and a fixing device for the chock.

FIG. 2 is an enlarged view of a chock fixing device.

FIG. 3 is a sectional view of a guide portion of the cotter.

FIG. 4 is a front view of a main part of FIG. 1 viewed from the roll shaft end direction.

FIG. 5 is a vertical cross-sectional view with a part omitted showing a typical configuration of a conventional chock fixing device.

FIG. 6 is a front view of a thrust ring having two halves.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Roll 2 ... Roll neck part 4 ... Thrust bearing 5 ... Chock 6 ... Annular groove 9 ... Spacer ring receiver 10 ... Spacer ring 12 ... Thrust stopper 13 ... Cotter 13b ... Hooking part 16 ... Attachment lever 17 ... Lever pin 20 ... Stopper retainer 21 ... Hooking pin 22 ... Lever holding roller 23 ... Removal prevention L ... Chock fixing mechanism (device) E ... Arm

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 60-56103 (JP, U) Fukai Hei 2-38105 (JP, U) Japanese Patent 52-47414 (JP, B1) Japanese Public Sho 59- 13285 (JP, B1) JP 60-38204 (JP, B2) JP 59-27926 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A device for fixing a chock externally fitted to a roll neck portion of a rolling mill roll by interposing a bearing by fixing a thrust stopper in an annular groove portion at the end portion of the roll neck. Is formed in a block shape at a plurality of positions in the annular groove, and a cotter for pressing and fixing the thrust stopper in the annular groove is provided, while a spacer fitted on the roll neck is provided between the cotter and the chock. A spacer is interposed, a cotter attaching / detaching lever is provided on the spacer ring, and the cotter is slidably guided by the action of the attaching / detaching lever so as to be vertically movable. A device for fixing a rolling mill roll and a chock, which is provided with a hook portion for lifting the thrust stopper together.