Belt driving apparatus and image forming apparatus using the same
View Patent ↗A belt driving apparatus which inhibits a belt meandering so as to improve a printing quality and rapidly starts a printing motion at a time of starting the apparatus such as a time of turning on power or the like, and an image forming apparatus using the same. The belt driving apparatus has an endless belt, a plurality of belt tension supports for supporting the belt in a tension manner, and a steering roller supported in a tiltable manner and compensating a meandering of the belt, and the belt driving apparatus is provided with a meandering compensation sensitivity adjuster for adjusting a belt meandering compensation sensitivity of the steering roller per an angle of incline.
1. A belt driving apparatus comprising:
an endless belt;
a plurality of belt tension supporting means for supporting said endless belt in a tension manner; and
a driving means for driving said endless belt,
wherein at least one of said plurality of belt tension supporting means is a steering roller which is tilted for compensating a meandering of said belt;
wherein said belt driving apparatus is provided with a meandering compensation sensitivity adjusting means for adjusting a meandering compensation sensitivity of said steering roller per an angle of incline; and
wherein said meandering compensation sensitivity adjusting means is a belt tension supporting means which moves along a carrying path of said belt provided in an upstream side in a driving direction of said belt with respect to said steering roller.
2. A belt driving apparatus as claimed in claim 1 , wherein the belt tension supporting means moving along said belt carrying path is a roller following to the belt.
3. A belt driving apparatus as claimed in claim 1 , wherein the belt tension supporting means moving along said belt carrying path is a sliding member.
4. A belt driving apparatus comprising:
an endless belt;
a plurality of belt tension supporting means for supporting said endless belt in a tension manner; and
a driving means for driving said endless belt,
wherein at least one of said plurality of belt tension supporting means is a steering roller which is tilted for compensating a meandering of said belt;
wherein said belt driving apparatus is provided with a meandering compensation sensitivity adjusting means for adjusting a meandering compensation sensitivity of said steering roller per an angle of incline; and
wherein said meandering compensation sensitivity adjusting means is a belt tension supporting means which moves along a carrying path of said belt provided in an upstream side in a driving direction of said belt with respect to said steering roller.
5. A belt driving apparatus as claimed in claim 4 , wherein the belt tension supporting means retracting from said belt carrying path is a roller following to the belt.
6. A belt driving apparatus as claimed in claim 4 , wherein the belt tension supporting means retracting from said belt carrying path is a sliding member.
7. A belt driving apparatus comprising:
an endless belt;
a plurality of belt tension supporting means for supporting said endless belt in a tension manner; and
a driving means for driving said endless belt,
wherein at least two of said plurality of belt tension supporting means are steering rollers which are tilted for compensating a meandering of said belt, and
wherein a meandering compensation sensitivity is different from each other in said two or more steering rollers.
8. A belt driving apparatus as claimed in claim 7 , wherein rollers following to said belt are provided in an upstream side in a driving direction of said belt with respect to said two or more steering rollers.
9. A belt driving apparatus as claimed in claim 7 , wherein sliding members are provided in an upstream side in a driving direction of said belt with respect to said two or more steering rollers.
10. An image forming apparatus provided with a plurality of printing units, each printing unit comprising:
a photosensitive body;
a charging apparatus for charging a surface of said photosensitive body;
an exposure apparatus for exposing the surface of said photosensitive body; and
a developing apparatus for forming a toner image on the surface of said photosensitive body,
wherein the image forming apparatus comprises:
an endless intermediate transfer belt for conveying the toner image formed by said plurality of printing units to a transferring position onto a paper;
a tension supporting means for supporting said intermediate transfer belt in a tension manner;
a steering roller tilting for compensating a meandering of said intermediate transfer belt; and
a meandering compensation sensitivity adjusting means for adjusting a meandering compensation sensitivity of said steering roller per an angle of incline;
wherein said meandering compensation sensitivity adjusting means is a belt tension supporting means which moves along a carrying path of said belt provided in an upstream side in a driving direction of said belt with respect to said steering roller.
11. A belt driving apparatus as claimed in claim 10 , wherein the belt tension supporting means moving along said belt carrying path is a roller following to the belt.
12. A belt driving apparatus as claimed in claim 10 , wherein the belt tension supporting means moving along said belt carrying path is a sliding member.
13. An image forming apparatus provided with a plurality of printing units, each printing unit comprising:
a photosensitive body;
a charging apparatus for charging a surface of said photosensitive body;
an exposure apparatus for exposing the surface of said photosensitive body; and
a developing apparatus for forming a toner image on the surface of said photosensitive body,
wherein the image forming apparatus comprises:
an endless intermediate transfer belt for conveying the toner image formed by said plurality of printing units to a transferring position onto a paper;
a tension supporting means for supporting said intermediate transfer belt in a tension manner;
a steering roller tilting for compensating a meandering of said intermediate transfer belt; and
a meandering compensation sensitivity adjusting means for adjusting a meandering compensation sensitivity of said steering roller per an angle of incline;
wherein said meandering compensation sensitivity adjusting means is a belt tension supporting means which retracts from a carrying path of said belt provided in an upstream side in a driving direction of said belt with respect to said steering roller.
14. A belt driving apparatus as claimed in claim 13 , wherein the belt tension supporting means retracting from said belt carrying path is a roller following to the belt.
15. A belt driving apparatus as claimed in claim 13 , wherein the belt tension supporting means retracting from said belt carrying path is a sliding member.