STICKING SUBSTANCE REMOVING APPARATUS AND IMAGE FORMING APPARATUS

Abstract

An image forming apparatus is provided capable of solving such problem of abrasion or load caused by the unevenness of installation position of cleaning member and capable of realizing excellent cleaning performance. A cleaning section in the image forming apparatus has a cleaning member with board shape which contacts with the surface of the charging roller through it's a first surface; and a fixing member which supports the cleaning member at least at an upstream side than a contact position between the charging roller and the cleaning member with respect to the rotation direction of the charging roller, the fixing member is formed so as to not contact with the cleaning member in an area of a second surface which is opposite to the contact part of the charging roller and the cleaning member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross section showing a structure of an image forming apparatus in embodiment 1 of the present invention;

FIG. 2 is a front view diagram showing a structure of an image forming unit in an image forming apparatus in embodiment 1 of the present invention;

FIG. 3 is a front view diagram showing an important portion obtained by magnifying the circumference of a cleaning member in an image forming unit in FIG. 2;

FIG. 4 is a cubic diagram for an explanation about an arrangement of a cleaning member and a fixing member with respect to a charging roller in an image forming apparatus in embodiment 1 of the present invention;

FIG. 5 is a side view diagram showing a cleaning member in an image forming apparatus in embodiment 1 of the present invention;

FIG. 6 is a coordinate diagram showing an experiment result obtained by requesting a relation between a displacement quantity of an installation position of a cleaning member with respect to a radius direction of a charging roller and a load torque of an image carrying body which occurs through a cleaning member to contact in the case to use the cleaning member shown by FIGS. 2-5;

FIG. 7 is a front view diagram showing a structure of an image forming unit in a conventional image forming apparatus;

FIG. 8 is a front view diagram showing an important portion obtained by magnifying the circumference of a cleaning member in an image forming unit in FIG. 7;

FIG. 9 is a coordinate diagram showing an experiment result obtained by requesting a relation between a displacement quantity of an installation position of a cleaning member with respect to a radius direction of a charging roller and a load torque of an image carrying body which occurs through a cleaning member to contact in the case to use the cleaning member shown by FIGS. 7-8;

FIG. 10 is a front view diagram showing a structure of an image forming unit in an image forming apparatus in embodiment 2 of the present invention;

FIG. 11 is a front view diagram showing an important portion obtained by magnifying the circumference of a cleaning member in an image forming unit in FIG. 10;

FIG. 12 is a side view diagram showing a cleaning member in an image forming apparatus in embodiment 2 of the present invention;

FIG. 13 is a coordinate diagram showing an experiment result obtained by requesting a relation between a displacement quantity of an installation position of a cleaning member with respect to a radius direction of a charging roller and a load torque of an image carrying body which occurs through a cleaning member to contact in the case to use the cleaning member shown by FIGS. 10-12;

FIG. 14 is a front view diagram showing a structure of an image forming unit in an image forming apparatus in embodiment 3 of the present invention; and

FIG. 15 is a front view diagram showing an important portion obtained by magnifying the circumference of a cleaning member in an image forming unit in FIG. 14.

Claims

1. A sticking substance removing apparatus for removing sticking substance sticking on surface of an appointed rotating body, comprising: a contacting member with board shape which has a first surface and a second surface, and contacts with said rotating body through said first surface; anda supporting section which supports said contacting member at least at an upstream side than a contact position between said rotating body and said contacting member with respect to a rotation direction of said rotating body,wherein said supporting section is formed so as to not contact with said contacting member at least in an area of said second surface which is opposite to a contact part of said rotating body and said contacting member.

2. The sticking substance removing apparatus according to claim 1, wherein said supporting section supports said contacting member respectively at said upstream side and at a downstream side than a contact position between said rotating body and said contacting member with respect to a rotation direction of said rotating body.

3. The sticking substance removing apparatus according to claim 2, wherein in the case that said first surface of said contacting member is in contact with said rotating body, in order to make a force which is added to said contacting member from said rotating body in a radius direction of said rotating body escape, said supporting section includes two supporting areas to respectively support said contacting member at said upstream side and at said downstream side than said contact position between said rotating body and said contacting member with respect to said rotation direction of said rotating body, a predetermined space is formed by said two supporting areas.

4. The sticking substance removing apparatus according to claim 3, wherein when setting a straight line distance corresponding to said contact part of said contacting member and said rotating body as a, setting a contact point approximately in center of said distance a as P, and setting an interval between said two supporting areas along a tangent line of said rotating body passing through said contact point P as A, said supporting section is formed so as to meet a relation of A>a; when setting a maximum projection quantity of said contacting member caused by a pressure toward said radius direction of said rotating body at said contact point P as b, and setting a distance of said space of said supporting section in said radius direction of said rotating body at said contact point P as B, said supporting section is formed so as to meet a relation of B>b.

5. The sticking substance removing apparatus according to claim 1, wherein said supporting section is supporting said contacting member at said upstream side than said contact position between said rotating body and said contacting member with respect to said rotation direction of said rotating body; andsaid contacting member, when said first surface is in contact with said rotating body, is formed so as to fall downward.

6. The sticking substance removing apparatus according to claim 5, further comprising: a reinforcing member which is sandwiched between said second surface of said contacting member and said supporting section, and is used to reinforce said contacting member.

7. The sticking substance removing apparatus according to claim 6, wherein said reinforcing member has a greater bend elasticity coefficient than said contacting member.

8. The sticking substance removing apparatus according to claim 1, wherein said rotating body is belt shaped.

9. The sticking substance removing apparatus according to claim 1, wherein said rotating body is a charging roller to charge an image carrying body; andsaid contacting member removes said sticking substance sticking on said surface of said charging roller.

10. An image forming apparatus for forming an image onto an appointed record medium, comprising: an image forming section to develop an electrostatic latent image formed on an image carrying body through a sticking substance, and perform an image formation with respect to said record medium; anda sticking substance removing section to remove sticking substance sticking on surface of an appointed rotating body,wherein said sticking substance removing section includes:a contacting member with board shape which has a first surface and a second surface, and contacts with said rotating body through said first surface; anda supporting section which supports said contacting member at least at an upstream side than a contact position between said rotating body and said contacting member with respect to a rotation direction of said rotating body,said supporting section is formed so as to not contact with said contacting member at least in an area of said second surface which is opposite to a contact part of said rotating body and said contacting member.