Elastic roller
An elastic roller is capable of elastic deformation at low load, lightweight and low-cost, and the surface speed of the roller has been made stable. At a drawing showing the view from the side of pipe 2 and flange 3 which make up roller 1 , roller 1 which has pipe 2 and flange 3 is supported by shaft 8 which is inserted therein along axis 8 a of shaft 8 , the situation being such that elastic deformation occurs upon being pressed downward by pressure P from pressure-applying body 11 above pipe. None of the four outermost ribs 7 a disposed in outermost gap 6 a between outermost ring 4 a of flange 3 and middle ring 4 b which is mutually adjacent thereto and toward the interior therefrom is present in the upper portion of pipe 2.
1. An elastic roller, comprising:
a cylindrical pipe and a plurality of flanges:
wherein the cylindrical pipe is a thin-walled cylindrical pipe formed of an elastically deformable material;
wherein the cylindrical pipe defines a central longitudinal axis located at a center of the diameter of the cylindrical pipe;
wherein the plurality of flanges are formed of an elastically deformable material;
wherein the elastically deformable material of the cylindrical pipe and the plurality of flanges is capable of deforming in order to produce a reactive-force-producing load and exhibits a reactive-force-producing elasticity when a load is applied to the cylindrical pipe along the central longitudinal axis;
wherein the flanges present at the are located at either of two ends of the cylindrical pipe;
wherein each of the plurality of flanges has a plurality of annular rings of differing diameters that are located peripheral to the central longitudinal axis;
wherein each of the plurality of flanges comprises a plurality of ribs arranged so as to be perpendicular to the annular rings;
wherein the ribs are provided such that the ribs are uniformly spaced around the annular rings and are located in annular gaps between the annular rings, among these annular rings of differing diameters, which are a small-diameter ring and a large-diameter ring located adjacent to the small-diameter ring;
wherein the flanges are integrally formed such that they comprise the plurality of ribs and annular rings of differing diameters; and the two ends of walled cylindrical pipe engage with and are captured by outside circumferences of outermost annular rings of the flanges; and
wherein the cylindrical pipe and the flanges are capable of undergoing elastic deformation in the same direction, relative to the central longitudinal axis of the cylindrical pipe, when a load is applied to the cylindrical pipe.
2. The elastic roller according to claim 1 , further comprising:
a hole located at a center of each of the plurality of flanges; and
a shaft that extends through the hole of at least one of the plurality of flanges and supports the elastic roller or shaft-shaped bodies that extend through the hole of at least one of the plurality of flanges and support the elastic roller;
wherein the shaft or shaft-shaped bodies extend beyond an exterior surface of at least one of the plurality of flanges.
3. The elastic roller according to claim 1 , further comprising:
a hole located at a center of each of the plurality of flanges; and
a shaft that extends through the hole of at least one of the plurality of flanges and supports the elastic roller or shaft-shaped bodies that extend through the hole of at least one of the plurality of flanges and support the elastic roller;
wherein the shaft or shaft-shaped bodies extend beyond an exterior surface of at least one of the plurality of flanges; and
wherein the plurality of flanges is molded from resin material.
4. The elastic roller according to claim 1 , further comprising:
a hole located at a center of each of the plurality of flanges; and
a shaft that extends through the hole of at least one of the plurality of flanges and supports the elastic roller or shaft-shaped bodies that extend through the hole of at least one of the plurality of flanges and support the elastic roller;
wherein the shaft or shaft-shaped bodies extend beyond an exterior surface of at least one of the plurality of flanges;
wherein the cylindrical pipe exhibits a Young's modulus E 1 and a second moment of inertia I 1 ;
wherein the plurality of flanges exhibits a Young's modulus E 2 and a second moment of inertia I 2 , and
wherein the values of E 1 , I 1 , E 2 , and I 2 satisfy at least one of the following inequalities:
E 1 ×I 1 ≥E 2 ×I 2 or E 1 ×L ×( t 1 ) 3 ≥E 2 ×b ×( t 2 ) 3
wherein the length of the pipe is L, the wall thickness of the pipe is t t , the width in a shaft direction of the annular rings of the flanges is b, and the thickness of the annular rings of the flanges is t 2 .
5. The elastic roller according to claim 1 , further comprising:
a coating that comprises at least one of silicone, urethane, and PTFE.
6. The elastic roller according to claim 1 , wherein the elastic roller is covered by woven or knit fabric.
7. The elastic roller according to claim 1 , characterized in that wherein the cylindrical pipe comprises an electrically conductive material.