US 4,234,076 AGranted

Magnetic roller conveyor

OwnerHeinrich Spodiginventor

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Abstract

A magnetic roller conveyor for transporting magnetically conductive objects comprises at least two magnetically conductive rollers and at least two pairs of permanent magnets each located adjacent to and connected with the respective axial end portions of the respective rollers. The magnets of the same pair of magnets are polarized differently with respect to each other, whereas the magnets connected to the same roller are polarized identically with respect to each other. The rollers and the magnets connected thereto form together a magnetically closed path. The rollers are rotatably mounted on magnetically conductive shafts which latter also form a part of the above magnetically closed path. A second magnet system may be provided which is mirror-inverted with respect to the above-mentioned first magnetic system so that force of attraction of the rollers is doubled. Switching members are further provided operative for demagnetizing and subsequently remagnetizing of the rollers.

Claims21

Dependent claims

A magnetic roller conveyor for transporting magnetically conductive objects, comprising at least two magnetically conductive roller elements each having an axis, each of said roller elements having a first end portion and a second end portion axially spaced from one another;

and a magnetic system for polarizing said roller elements including at least a first pair of magnetic elements located adjacent and magnetically connected with each other and to said first end portions of the respective roller elements, and at least a second pair of magnetic elements located adjacent to and magnetically connected with each other and to said second end portions of the respective roller elements, the magnetic elements of each of the pairs being differently polarized with respect to each other, and the magnetic elements of each of said first and said second end portions of the respective roller element being identically polarized with respect to each other, so that said two roller elements and said first and said second pairs of said magnetic elements together form a closed magnetic path;
a first magnetically conductive guide member supporting and magnetically connecting with each other the magnetic elements of said first pair, and a second magnetically conductive guide member supporting and magnetically connecting with each other the magnetic elements of said second pair;
and at least two magnetically conductive shafts each defining said axis and magnetically connected with the respective roller and the two magnetic elements connected to the end portions of the latter, each of said shafts having two end sections axially spaced from each other, and each of said magnetic elements having one portion supported by the respective guide member and the other portion spaced from said supporting portion, said other portion of said magnetic element being provided with a pole shoe formed as a bearing for the respective end sections of the respective shaft.

and a magnetic system for polarizing said roller elements including at least a first pair of magnets located adjacent and magnetically connected with each other and to said first end portions of the respective roller elements, and at least a second pair of magnets located adjacent to and magnetically connected with each other and to said second end portions of the respective roller elements, the magnets of each of the pairs being differently polarized with respect to each other, and the magnets of each of said first and said second end portions of the respective roller element being identically polarized with respect to each other, so that said two roller elements and said first and said second pairs of said magnets together form a closed magnetic path;
a first magnetically conductive guide member supporting and magnetically connecting with each other the magnets of said first pair, and a second magnetically conductive guide member supporting and magnetically connecting with each other the magnets of said second pair;
and at least two magnetically conductive shafts each defining said axis and magnetically connected with the respective roller and the two mangets connected to the end portions of the latter, each of said shafts having two end sections axially spaced from each other, and each of said magnets having one portion supported by the respective guide member and the other portion spaced from said supporting portion, said other portion of said magnet being provided with a pole shoe formed as a bearing for the respective end sections of the respective shaft.

and a magnetic system for polarizing said roller elements including at least a first magnet and a first soft iron member located adjacent and magnetically connected with each other and to said first end portions of the respective roller elements, and at least a second magnet and a second soft iron member located adjacent to and magnetically connected with each other and to said second end portions of the respective roller elements, the magnet and the soft iron member of each of the pairs being differently polarized with respect to each other, and the magnets and the soft iron members of each of said first and said second end portions of the respective roller element being identically polarized with respect to each other, so that said two roller elements and said first and said second magnet and soft iron members together form a closed magnetic path;
a first magnetically conductive guide member supporting and magnetically connecting with each other said first magnet and said first soft iron member, and a second magnetically conductive guide member supporting and magnetically connecting with each other said second magnet and said second soft iron member;
and at least two magnetically conductive shafts each defining said axis and magnetically connected with the respective roller and the magnets and the soft iron members connected to the end portions of the latter, each of said shafts having two end sections axially spaced from each other, and each of said magnets and said soft iron members having one portion supported by the respective guide member and the other portion spaced from said supporting portion, said other portion of said magnets and said soft iron members being provided with a pole shoe formed as a bearing for the respective end sections of the respective shaft.

Dependencies are inferred from the claim text.