Brush roll and its brush device

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.

A brush element characterized in that the brush element comprises 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 to provide an assembly of brush elements as fitted around a shaft and arranged side by side longitudinally of the shaft, the brush element being engageable 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 the shaft.

A brush roll comprising:

• (i) a shaft;
• (ii) brush elements composed of annular disks joined together side by side and arranged along the shaft, each disk having polishing bristles or cleaning yarns implanted in its outer periphery, wherein keyways are formed in both a peripheral surface of the shaft and an inner peripheral surface of the disk;
• (iii) sunk keys fitted in the respective keyways, said sunk keys having a length not exceeding the length of the brush elements, each sunk key being expandable or contractable widthwise and tightly engageable in the keyway when being expanded, each sunk key being disengageable therefrom when being contracted;
• and (iv) retainers attached to the sunk keys to prevent the sunk keys from slipping out of the respective keyways when the sunk keys are contracted and fitted in the respective keyways.