Brush roll and its brush device

Details Brush roll and its brush device Brush roll and its brush device

2001-03-27

2002-10-29

Nguyen, George (Department: 3723)

Abrading

Carrier for relatively movable simultaneously usable tools

For radially movable tools

C451S469000, C451S342000

Reexamination Certificate

active

06471575

ABSTRACT:

TECHNICAL FIELD
The present invention relates to brush rolls and brush elements therefor for use in grinding, polishing, cleaning or otherwise treating steel sheets, plates or strips (hereinafter referred to briefly as “steel plates”) in the iron manufacturing industry, and more particularly to brush rolls of the type wherein a brush element fitted around a shaft comprises annular disks arranged side by side and each having polishing bristles or cleaning yarns implanted in the outer periphery thereof, and also to the brush element.
Such a brush roll needs to be replaced by a new one when worn, and the replacement interval is not long. The brush roll has its shaft supported at each of its opposite ends by a bearing on a roll chock.
BACKGROUND ART
Brush rolls of the type mentioned conventionally have the following construction. Many annular disks each having polishing bristles or cleaning yarns implanted in the outer periphery thereof and for use in one roll are arranged side by side and fitted around a shaft to obtain an assembly, which is compressed at its opposite sides under a great pressure and held compressed by flanges secured to the shaft. Accordingly, the brush roll must be replaced by a new one, with the annular disks connected to the shaft. If the flange on the shaft is inadvertently loosened to separate the disk assembly from the shaft, the annular disks are abruptly released from compression to jump about instantly, hence a hazard.
To replace the brush roll by a new one with the disk assembly connected to the shaft, the roll chock and the bearing must be disassembled or demounted, removed and reinstalled at each shaft end for old and new rolls. In other words, roll chocks which are four in total number and bearings, four in total number, need to be disassembled, removed and reinstalled. The roll chock is not always easy to disassemble and remove. The bearing which is tightly secured to the shaft with a shrinkage fit is considerably difficult to separate or remove from the shaft, while it is also difficult to mount thereon because of the need for a shrinkage fit. It is therefore not too much to say that extreme difficulties are encountered in disassembling, removing and reinstalling four roll chocks which are not always easy to handle, and in separating, removing and reinstalling four bearings which are considerably difficult to handle. The brush roll equipped with the shaft usually weighs about 1 ton, so that it is not easy to remove the brush roll itself from the frame of the brush roll machine, to reinstall the roll thereon and to transport the roll between the user and the manufacturer.
The construction of the brush roll wherein the annular disks are fitted around the shaft means that a clearance is needed between the shaft and the disks. Conventionally, a brush element is engaged with the shaft by conventional keys and keyways to transmit the torque of the shaft to the brush element. The operation of the brush roll therefore causes the deflection of the roll axis that would produce faults in the quality such as chatter marks. For this reason, the conventional brush roll still remains to be improved for use in grinding or polishing steel plates of which high accuracy is required.
An object of the present invention is to facilitate the replacement of the old brush roll of the type described first by a new one.
Another object of the invention is to assure brush rolls of easier maintenance than conventionally for use in grinding, polishing, cleaning or otherwise treating steel plates of different widths.
Still another object of the invention is to solve the problem of the deflection of the roll axis involved in the prior art.
DISCLOSURE OF THE INVENTION
The present invention provides brush rolls having the following respective constructions 1, 2.
1. A brush roll characterized in that the brush roll comprises a plurality of brush elements fitted around a shaft and arranged side by side longitudinally of the shaft, each of the brush elements comprising an assembly of annular disks joined together as arranged side by side in the direction of width thereof and each having polishing bristles or cleaning yarns implanted in an outer periphery thereof, each of the brush elements being held in engagement with the shaft by keyways formed in both a peripheral surface of the shaft and an inner peripheral surface of the brush element and equidistantly spaced apart circumferentially of the peripheral surfaces and by sunk keys fitting in the respective keyways, the sunk keys and the keyways being each so profiled in cross section that the sunk key is prevented from slipping out of the keyway radially of the brush element, the sunk keys having a length not larger than the length of the brush element, each of the sunk keys being expandable or contractable widthwise thereof and tightly engageable in the keyway when expanded and disengageable therefrom when contracted, the sunk key being prevented from slipping out of the keyway in the brush element longitudinally of the keyway by retaining means when fitted as contracted in the keyway.
2. A brush roll characterized in that the brush roll comprises a plurality of brush elements fitted around a shaft and arranged side by side longitudinally of the shaft, each of the brush elements comprising an assembly of annular disks joined together as arranged side by side in the direction of width thereof and each having polishing bristles or cleaning yarns implanted in an outer periphery thereof, each of the brush elements being held in engagement with the shaft by keyways formed in both a peripheral surface of the shaft and an inner peripheral surface of the brush element and equidistantly spaced apart circumferentially of the peripheral surfaces and by sunk keys fitting in the respective keyways, the sunk keys and the keyways being each so profiled in cross section that the sunk key is prevented from slipping out of the keyway in the brush element radially of the brush element, each the sunk keys comprising a first key member and a second key member each having a length not larger than the length of the brush element, the first key member comprising engaging portions extending in parallel to each other and engageable with side walls defining the keyway, protrusions and recesses formed in an inner side face of each of the engaging portions and arranged alternately longitudinally thereof, bridge portions of the spring type interconnecting the engaging portions while rendering the engaging portions movable toward or away from each other widthwise of the first key member and a groove for the second key member to fit in movably longitudinally of the first key member, the parallel engaging portions of the first key member being tightly engageable in the keyway when moved away from each other widthwise and disengageable therefrom when moved toward each other widthwise, the second key member having outer side faces each provided with recesses and protrusions conforming in shape and arrangement to the protrusions and the recesses arranged alternately along the inner side face of the engaging portion, intermediate portions between the protrusions of engaging portion of the first key member and the recesses thereof and intermediate portions between the recesses of the second key member and the protrusions thereof being so inclined that the second key member is movable relative to the first key member longitudinally thereof, the second key member having at one end thereof stoppers removable by cutting or breaking and cooperative with a removable spacer to be attached to said one end for limiting the depth of longitudinal insertion of the second key member into the groove relative to the first key member, the first key member further having an indented portion formed in one end face thereof for permitting the stoppers to move in with the longitudinal movement of the second key member, and stoppers disposed at the other end face thereof for bearing contact with an end face of the brush element close to a shaft bore thereof.
The present invention provides br

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