US 2019/0250545 A1Published application

Image Forming Apparatus

AssigneeBrother Kogyo Kabushiki Kaisha

InventorsMariko Uchida, Tetsuya Morita

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Abstract

An image forming apparatus includes an image forming unit and a re-conveyor. The re-conveyor includes a first bevel gear, a second bevel gear, a first re-conveying roller, a shaft member, a first engaged member, a second engaged member, and an engaging member. When the second bevel gear is rotated in a rotational direction by a driving force transmitted from the first bevel gear, the engaging member is moved to a second position and engaged with the first and second engaged members to rotate the shaft member in a rotational direction. When the shaft member is rotated in the rotational direction by a driving force transmitted from the first re-conveying roller, the engaging member is moved to a first position, disengaged from the second engaged member, and engaged with the first engaged member to interrupt transmission of the driving force from the shaft member to the second bevel gear.

Claims10

Dependent claims

An image forming apparatus, comprising:

an image forming unit configured to form an image on a sheet;
and
a re-conveyor configured to re-convey the sheet on which an image is formed toward the image forming unit in a re-conveying direction,
wherein the re-conveyor comprises:
a first bevel gear configured to receive a driving force transmitted from a drive source;
a second bevel gear engaged with the first bevel gear and configured to be rotated about an axis extending in a first direction;
a first re-conveying roller configured to convey the sheet in the re-conveying direction;
a shaft member configured to transmit the driving force transmitted from the second bevel gear, to the first re-conveying roller;
a first engaged member provided at one end of the second bevel gear in the first direction, which one end is nearer to the shaft member than the other end of the second bevel gear in the first direction, the first engaged member being configured to be rotated together with the second bevel gear;
a second engaged member provided at the other end of the shaft member in the first direction, which other end is nearer to the second bevel gear than one end of the shaft member in the first direction, the second engaged member being configured to be rotated together with the shaft member;
and
an engaging member disposed between the first engaged member and the second engaged member and movable between a first position at which the engaging member is engaged only with the first engaged member and a second position at which the engaging member is engaged with the first engaged member and the second engaged member, and
wherein the engaging member is configured to:
when the second bevel gear is rotated in a rotational direction by the driving force transmitted from the first bevel gear, be moved to the second position and engaged with the first engaged member and the second engaged member to rotate the shaft member in the rotational direction;
and
when the shaft member is rotated in the rotational direction by the driving force transmitted from the first re-conveying roller, be moved to the first position, disengaged from the second engaged member, and engaged with the first engaged member to interrupt transmission of the driving force from the shaft member to the second bevel gear.

13 more elements

An image forming apparatus, comprising:

an image forming unit configured to form an image on a sheet;
and
a re-conveyor configured to re-convey the sheet on which an image is formed toward the image forming unit in a re-conveying direction,
wherein the re-conveyor comprises:
a first bevel gear configured to receive a driving force transmitted from a drive source;
a second bevel gear engaged with the first bevel gear and configured to be rotated about an axis extending in a first direction;
a first re-conveying roller configured to convey the sheet in the re-conveying direction;
a shaft member that is a portion of a transmission mechanism configured to transmit the driving force from the second bevel gear to the first re-conveying roller;
a first engaged member provided at one of opposite end portions of the second bevel gear, which one is nearer to the shaft member in the first direction than the other, and the first engaged member is configured to be rotated about the axis together with the second bevel gear;
a second engaged member provided at one of opposite end portions of the shaft member, which one is nearer to the second bevel gear in the first direction than the other, the second engaged member being configured to be rotated about the axis together with the shaft member;
and
an engaging member disposed between the first engaged member and the second engaged member and comprising a first engaging portion and a second engaging portion, the first engaging portion being an end portion of the engaging member which is nearer to the first engaged member in the first direction than the second engaging portion, the second engaging portion being an end portion of the engaging member which is nearer to the second engaged portion in the first direction than the first engaging portion, the engaging member being movable in the first direction between a first position at which the first engaging portion is engaged with the first engaged member, and the second engaging portion is not engaged with the second engaged portion and a second position at which the first engaging portion is engaged with the first engaged member, and the second engaging portion is engaged with the second engaged member,
wherein at least one of the first engaged member and the engaging member comprises a first converting inclined portion configured to convert rotational power of the first engaged member about the axis, to a force that is applied from the first engaged member to the engaging member and that is directed from the first position toward the second position, and
wherein at least one of the second engaged member and the engaging member comprises a second converting inclined portion configured to convert rotational power of the second engaged member about the axis, to a force that is applied from the second engaged portion to the engaging member and that is directed from the second position toward the first position.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/273,489Filed 12 Feb 2019
Priority: JP 2018-02311713 Feb 2018
Published: 15 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G03G 15/234
Using a single reusable electrographic recording member: by inverting and refeeding the image receiving material with an image on one face to the…
B65H 5/062
By rollers or balls, e.g. between rollers: between rollers or balls
B65H 85/00
Recirculating articles, i.e. feeding each article to, and delivering it from, the
G03G 15/50
Apparatus for electrographic processes using a charge pattern: machine control of apparatus for electrographic processes using a charge pattern,…