Elastic body roller

Abstract

An elastic body roller which has an excellent non-stick property or release property, and frictional force (gripping force) and is able to stably feed and guide a belt-shaped member such as a linerless label, a typical liner label, or the like is provided. Attention has been paid to coating an outer layer of an inner layer elastic material member having a silicone resin (a outer layer elastic material member) with a C hardness (hardness by a spring-type Asker C type defined in the SRIS 0101 standard) set low. An elastic material member of an elastic body roller has an inner layer elastic material member provided on the outer periphery of a roller shaft, and a outer layer elastic material member provided on the outer periphery of the inner layer elastic material member and being in contact with a belt-shaped member, and the outer layer elastic material member is formed from a silicone resin with a C hardness of 20 degrees or less.

1 . An elastic body roller for feeding a belt-shaped member, the elastic body roller comprising:
 a roller shaft; and   an elastic material member surrounding the roller shaft, the elastic material member configured to feed the belt-shaped member by making contact with the belt-shaped member, the elastic material member including:
 an inner layer elastic material member disposed on an outer periphery of the roller shaft, and 
 an outer layer elastic material member disposed on an outer periphery of the inner layer elastic material member, the outer layer elastic material member configured to make contact with the belt-shaped member, and the outer layer elastic material member being formed from a silicone resin having a hardness of 20 degrees or less based on a spring type hardness tester Asker C in accordance with SRIS 0101. 
   
     
     
         2 . The elastic body roller according to  claim 1 , wherein an elastic body roller diameter in a plane perpendicular to an axial direction of the roller shaft is equal at both end portions and a center portion. 
     
     
         3 . The elastic body roller according to  claim 1 , wherein an elastic body roller diameter in the plane perpendicular to the axial direction of the roller shaft that gradually decreases towards both of the end portions from the center portion of the elastic body roller along the axial direction of the roller shaft. 
     
     
         4 . The elastic body roller according to  claim 1 , wherein the silicone resin has a thermosetting property. 
     
     
         5 . The elastic body roller according to  claim 1 , wherein the outer layer elastic material member has a thickness of 10 to 100 μm. 
     
     
         6 . The elastic body roller according to  claim 1 , wherein the inner layer elastic material member is formed from thermoplastic material or a thermosetting elastomeric material. 
     
     
         7 . The elastic body roller according to  claim 1 , wherein the inner layer elastic material member has a rubber hardness of 30 to 80 degrees according to a Durometer Hardness Testing Method Type A defined in JIS K6253. 
     
     
         8 . The elastic body roller according to  claim 1 , wherein the inner layer elastic material member is configured with a plurality of inner layer grooves along a circumferential direction thereof. 
     
     
         9 . The elastic body roller according to  claim 1 , wherein the outer layer elastic material member is configured with a plurality of outer layer grooves along a circumferential direction thereof. 
     
     
         10 . The elastic body roller according to  claim 8 , wherein the inner layer elastic material member is configured with a flat inner layer platform-shaped apex portion between of the inner layer grooves. 
     
     
         11 . The elastic body roller according to  claim 9 , wherein the outer layer elastic material member is configured with a flat outer layer platform-shaped apex portion between the outer layer grooves. 
     
     
         12 . The elastic body roller according to  claim 8 , wherein the inner layer grooves have a pitch of 500 to 1500 μm. 
     
     
         13 . The elastic body roller according to  claim 8 , wherein the inner layer grooves have a width of 25 to 1300 μm. 
     
     
         14 . The elastic body roller according to  claim 8 , wherein the inner layer grooves have a height of 25 to 500 μm. 
     
     
         15 . The elastic body roller according to  claim 8 , wherein the inner layer grooves have a V-shaped cross-section and an a groove angle of 50 to 120 degrees. 
     
     
         16 . The elastic body roller according to  claim 3 , wherein the inner layer elastic material member has an inner layer elastic body roller diameter in the plane perpendicular to the axial direction of the roller shaft that gradually decreases towards both of the end portions from the center portion of the elastic body roller along the axial direction of the roller shaft. 
     
     
         17 . The elastic body roller according to  claim 3 , wherein the outer layer elastic material member has a coating thickness in the plane perpendicular to the axial direction of the roller shaft that gradually decreases towards both of the end portions from the center portion along the axial direction of the roller shaft. 
     
     
         18 . The elastic body roller according to  claim 3 , wherein the elastic body roller diameter of the elastic body roller gradually decreases towards both of the end portions from the center portion along the axial direction of the roller shaft. 
     
     
         19 . The elastic body roller according to  claim 3 , wherein the elastic body roller diameter of the elastic body roller decreases step-wise towards both of the end portions from the center portion along the axial direction of the roller shaft. 
     
     
         20 . The elastic body roller according to  claim 3 , wherein a difference between an elastic body roller center portion diameter at the center portion along the axial direction of the roller shaft and an elastic body roller end portion diameter at both of the end portions is 10 to 250 μm, with respect to the elastic body roller diameter in the plane perpendicular to the axial direction of the roller shaft of the elastic roller.