Tsuda, Isami;

Apparatus for testing abrasion

The present invention relates to an abrasion tester, and in particular to an abrasion tester capable of testing abrasion or breakage of a road generated by the travel of cars in the winter or summer under actual road conditions. The tester includes a turntable rotatably supported in the apparatus for receiving test pieces, a cooling or high temperature chamber confronting the turntable so as to subject the test pieces to high or low temperatures, and a rotatable grinding member movable into and out of contact with the test pieces. Thus, when the grinding member is brought into contact with a test piece and is rotated, the turntable rotates to simulate travel of the grinding member on the test piece. Further, rotation of the turntable moves the test pieces through the chamber where they are subjected to appointed temperature conditions.

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What is claimed is:

1. An apparatus for testing the degree to which a test piece abrades, said apparatus comprising:

a turntable rotatably supported in the apparatus, said turntable having a test piece-inserting portion defined thereon for receiving a test piece;

a cooling or high-temperature chamber confronting said turntable and open to said turntable at a location past which said test piece-inserting portion is moved when said turntable is rotated in the apparatus, said cooling or high-temperature chamber including heating and cooling means selectively operable for allowing the interior of said chamber to be heated and cooled;

a rotatable grinding member for abrading a test piece received in said test piece-inserting portion; and

support means supporting said grinding member in the apparatus and for moving said grinding member between a first position at which the grinding member is disposed away from said turntable and a second position at which said grinding member is operative to rotate in contact with a test piece received in said test piece-inserting portion and rotate said turntable, said second position being defined in the apparatus at another location past which said test piece-inserting portion is moved when said turntable is rotated in the apparatus.

2. An apparatus as claimed in claim 1, and further comprising a work table disposed over said turntable and having a diameter smaller than that of said turntable, and wherein the test piece-receiving portion of said turntable is provided outwardly of said work table, said cooling or high-temperature chamber being fixed to said work table.

3. An apparatus as claimed in claim 1, wherein said location at which said cooling or high-temperature chamber confronts said turntable is a semicircular area past which a peripheral portion of said turntable moves when rotated in the apparatus.

4. An apparatus as claimed in claim 1, wherein said support means moves said grinding member up and down relative to said turntable between said second and said first positions.

5. An apparatus for testing the degree to which a test piece abrades, said apparatus comprising:

a turntable rotatably supported in the apparatus, said turntable having a work table disposed thereover and a test piece-inserting portion defined thereon for receiving a test piece, the work table having a diameter smaller than that of said turntable, and the test piece-receiving portion of the turntable being provided outwardly of said work table;

a cooling or high-temperature chamber confronting said turntable and open to said turntable at a semicircular area past which a peripheral portion of said turntable moves when the turntable is rotated in the apparatus, said cooling or high-temperature chamber including heating and cooling means selectively operable for allowing the interior of said chamber to be heated and cooled;

a rotatable grinding member for abrading a test piece received in said test piece-inserting portion; and

support means supporting said grinding member in the apparatus and for moving said grinding member down and up relative to said turntable between a first position at which said grinding member is disposed away from said turntable and a second position at which said grinding member is operative to rotate in contact with a test piece received in said test piece-inserting portion and rotate said turntable, said second position being defined in the apparatus opposite said location and at another location past which said test piece-inserting portion is moved when said turntable is rotated in the apparatus.

6. An apparatus as claimed in claim 5, wherein said grinding member is a studded tire.

7. An apparatus as claimed in claim 5, wherein said heating and cooling means comprises a nozzle mounted to said chamber for injecting liquefied nitrogen gas into the chamber at a temperature within the range of -50.degree. C. to 0.degree. C. and a heater for heating the interior of the chamber to a temperature of within the range of 30.degree. C. to 80.degree. C.