Scrubbing device and roll sponge assembly used therein

Abstract

A roll sponge assembly for a scrubbing device includes a support having a support portion and a rotary shaft provided on two ends of the support portion, and a roll sponge having a hollow hole for holding the support by fitting the support portion of the support into the hollow hole. An outer diameter of the roll sponge assembly continuously or in stages increases in a lengthwise direction thereof.

1 . A roll sponge assembly for a scrubbing device, comprising:
 a support having a support portion and a rotary shaft provided on two ends of the support portion, and   a roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support,   wherein an outer diameter of the roll sponge assembly continuously gradually increases in a lengthwise direction thereof.   
   
   
       2 . A roll sponge assembly for a scrubbing device, comprising:
 a support having a support portion and a rotary shaft provided on two ends of the support portion, and   at least one roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support,   wherein an outer diameter of the roll sponge assembly increases in stages in a lengthwise direction.   
   
   
       3 . A roll sponge assembly according to  claim 1 , wherein
 an outer diameter of the support portion of the support continuously gradually increases in the lengthwise direction, and   an outer diameter of the roll sponge and an inner diameter of the hollow hole vary continuously in accordance with a variation in the outer diameter of the support portion.   
   
   
       4 . A roll sponge assembly according to  claim 1 , wherein
 an outer diameter of the support portion of the support continuously gradually increases in the lengthwise direction, and   an outer diameter of the roll sponge and an inner diameter of the hollow hole are constant in the lengthwise direction.   
   
   
       5 . A roll sponge assembly according to  claim 1 , wherein
 an outer diameter of the support portion of the support is constant in the lengthwise direction,   an outer diameter of the roll sponge continuously gradually increases in the lengthwise direction, and   an inner diameter of the hollow hole in the roll sponge is constant in the lengthwise direction.   
   
   
       6 . A roll sponge assembly according to  claim 2 , wherein
 an outer diameter of the support portion of the support varies so as to increase in stages in the lengthwise direction, and   the at least one roll sponge comprises a plurality of roll sponges formed such that outer diameters thereof and inner diameters of the hollow hole correspond to the outer diameters of the support portion varying in stages, and the respective outer diameters thereof and the inner diameters of the hollow holes are constant in the lengthwise direction.   
   
   
       7 . A roll sponge assembly according to  claim 2 , wherein
 an outer diameter of the support portion of the support varies so as to increase in stages in a lengthwise direction, and   an outer diameter of the at least one roll sponge and an inner diameter of the hollow hole vary in stages in accordance with the outer diameter of the support portion varying in stages.   
   
   
       8 . A roll sponge assembly according to  claim 2 , wherein
 an outer diameter of the support portion of the support varies so as to increase in stages in the lengthwise direction, and   an outer diameter of the at least one roll sponge and an inner diameter of the hollow hole are constant in the lengthwise direction.   
   
   
       9 . A roll sponge assembly according to  claim 2 , wherein
 the at least one roll sponge comprises a plurality of roll sponges formed such that respective outer diameters thereof vary in stages, and the respective outer diameters and an inner diameter of the hollow holes are constant in the lengthwise direction.   
   
   
       10 . A roll sponge assembly according to  claim 2 , wherein
 an outer diameter of the support portion of the support is constant in the lengthwise direction,   an outer diameter of the at least one roll sponge varies in stages in the lengthwise direction, and   an inner diameter of the hollow hole in the at least one roll sponge is constant in the lengthwise direction.   
   
   
       11 . A scrubbing device, comprising:
 a plurality of rollers for vertically supporting and rotating a cleaning subject, and   two of said roll sponge assemblies according to  claim 1  disposed horizontally and parallel to each other,   wherein the cleaning subject is cleaned by being moved in the lengthwise direction between the roll sponge assemblies rotating simultaneously.   
   
   
       12 . A scrubbing device, comprising:
 a plurality of rollers for vertically supporting and rotating a cleaning subject, and   two of said roll sponge assemblies according to  claim 2  disposed horizontally and parallel to each other,   wherein the cleaning subject is cleaned by being moved in the lengthwise direction between the roll sponge assemblies rotating simultaneously.   
   
   
       13 . A cleaning subject scrubbing method, comprising the steps of:
 vertically supporting and rotating a cleaning subject using a plurality of rollers,   rotating two roll sponge assemblies disposed horizontally and parallel to each other, each of said roll sponge assemblies including a support having a support portion and a rotary shaft provided on two ends of the support portion, and a roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support, wherein an outer diameter of the roll sponge assembly continuously gradually increases in a lengthwise direction thereof, and   moving the cleaning subject between the roll sponge assemblies in the lengthwise direction while the cleaning subject is being rotated by the plurality of rollers.   
   
   
       14 . A cleaning subject scrubbing method, comprising the steps of:
 vertically supporting and rotating a cleaning subject using a plurality of rollers;   rotating two roll sponge assemblies disposed horizontally and parallel to each other, each of said roll sponge assemblies including a support having a support portion and a rotary shaft provided on two ends of the support portion, and at least one roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support, wherein an outer diameter of the roll sponge assembly increases in stages in a lengthwise direction, and   moving the cleaning subject between the roll sponge assemblies in the lengthwise direction while the cleaning subject is being rotated by the plurality of rollers.