1. A sheet member position correcting device configured to move a sheet member in a width direction orthogonal to a conveying direction and correct a position of the sheet member in the width direction, the sheet member position correcting device comprising:
a driving roller configured to be driven by a driving unit which is controlled by a controller to rotate and be able to be moved in the width direction by a moving unit which is controlled by the controller;
a driven roller configured to be driven to rotate following the driving roller rotatably driven by the driving unit while pressing against the driving roller and nipping the sheet member, and be able to be driven in the width direction following the driving roller moved by the moving unit in the width direction; and
a stopper portion configured to be formed to abut on the driven roller and restrict a moving range of the driven roller in the width direction,
wherein, when the sheet member is not nipped between the driving roller and the driven roller, the controller moves the driving roller toward one end side of the width direction by using the moving unit until the driven roller a position of which is deviated in the width direction with respect to the driving roller abuts on the stopper portion, and, subsequently, the controller further moves the driving roller to a predetermined position toward the one end side of the width direction by using the moving unit in a state where the driven roller abuts on the stopper portion to correct the position of the driven roller in the width direction with respect to the driving roller.
2. The sheet member position correcting device according to claim 1, wherein control of correcting the position of the driven roller in the width direction with respect to the driving roller includes moving the driving roller toward one way in the width direction by the controller with using the moving unit and then moving the driving roller to a predetermined position toward the other way in the width direction.
3. The sheet member position correcting device according to claim 1, wherein the predetermined position is set such that the position of the driving roller in the width direction with respect to the driven roller which is abutting on the stopper portion is a normal position.
4. The sheet member correcting device according to claim 1, further comprising a guide plate configured to guide conveyance of the sheet member and comprise an opening portion which exposes a roller portion of the driven roller to abut on a roller portion of the driving roller,
wherein the stopper portion is both end portions of the opening portion formed to directly or indirectly abut on both end portions of the roller portion of the driven roller in the width direction.
5. The sheet member position correcting device according to claim 1, wherein the driven roller comprises an abutting member configured to be fixed to an end portion of a roller portion of the driven roller in the width direction, and be formed to rotate with the driven roller, and be formed to directly abut on the stopper portion.
6. The sheet member position correcting device according to claim 1, wherein, at a position where the driven roller does not abut on the driving roller, the driven roller comprises an abutting member configured to be rotatably held independently from rotation of the driven roller and be formed to directly abut on the stopper portion.
7. The sheet member position correcting device according to claim 5, wherein the abutting member comprises a buffer in part of an abutting plane which abuts on the stopper portion.
8. The sheet member position correcting device according to claim 6, wherein the abutting member comprises a buffer in part of an abutting plane which abuts on the stopper portion.
9. The sheet member position correcting device according to claim 1, further comprising a detecting unit configured to detect a position of an end portion of the sheet member in the width direction,
wherein the controller controls the moving unit to move the driving roller in the width direction based on a detection result of the detecting unit to correct the position of the sheet member nipped between the driving roller and the driven roller in the width direction.
10. An image forming apparatus comprising a sheet member position correcting device configured to move a sheet member in a width direction orthogonal to a conveying direction and correct a position of the sheet member in the width direction, wherein
the sheet member position correcting device comprises,
a driving roller configured to be driven by a driving unit which is controlled by a controller to rotate and be able to be moved in the width direction by a moving unit which is controlled by the controller;
a driven roller configured to be driven to rotate following the driving roller rotatably driven by the driving unit while pressing against the driving roller and nipping the sheet member, and be able to be driven in the width direction following the driving roller moved by the moving unit in the width direction;
a stopper portion configured to be formed to abut on the driven roller and restrict a moving range of the driven roller in the width direction, and
wherein, when the sheet member is not nipped between the driving roller and the driven roller, the controller moves the driving roller toward one end side of the width direction by using the moving unit until the driven roller a position of which is deviated in the width direction with respect to the driving roller abuts on the stopper portion, and, subsequently, the controller further moves the driving roller to a predetermined position toward the one end side of the width direction by using the moving unit in a state where the driven roller abuts on the stopper portion to correct the position of the driven roller in the width direction with respect to the driving roller.
11. The image forming apparatus according to claim 10, wherein control of correcting the position of the driven roller in the width direction with respect to the driving roller includes moving the driving roller toward one way in the width direction by the controller with using the moving unit and then moving the driving roller to a predetermined position toward the other way in the width direction.
12. The image forming apparatus according to claim 10, wherein the predetermined position is set such that the position of the driving roller in the width direction with respect to the driven roller which is abutting on the stopper portion is a normal position.
13. The image forming apparatus according to claim 10, wherein the sheet member correcting device further comprises a guide plate configured to guide conveyance of the sheet member and comprise an opening portion which exposes a roller portion of the driven roller to abut on a roller portion of the driving roller, and the stopper portion is both end portions of the opening portion formed to directly or indirectly abut on both end portions of the roller portion of the driven roller in the width direction.
14. The image forming apparatus according to claim 10, wherein the driven roller comprises an abutting member configured to be fixed to an end portion of a roller portion of the driven roller in the width direction, and be formed to rotate with the driven roller, and be formed to directly abut on the stopper portion.
15. The image forming apparatus according to claim 10, wherein, at a position where the driven roller does not abut on the driving roller, the driven roller comprises an abutting member configured to be rotatably held independently from rotation of the driven roller and be formed to directly abut on the stopper portion.
16. The image forming apparatus according to claim 14, wherein the abutting member comprises a buffer in part of an abutting plane which abuts on the stopper portion.
17. The image forming apparatus according to claim 15, wherein the abutting member comprises a buffer in part of an abutting plane which abuts on the stopper portion.
18. The image forming apparatus according to claim 10, wherein the sheet member correcting device further comprises a detecting unit configured to detect a position of an end portion of the sheet member in the width direction, and the controller controls the moving unit to move the driving roller in the width direction based on a detection result of the detecting unit to correct the position of the sheet member nipped between the driving roller and the driven roller in the width direction.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A data transmission control system comprising:
a server configured to store an application program having a data area in which transmission control information containing a threshold value used to detect abnormal data transmission is stored and to allow the application program to be downloaded in response to a request; and
a mobile device including:
a management table recording the transmission control information extracted from the downloaded application program;
a counter configured to count a number of messages or traffic volume per unit time;
a detector configured to compare the counted value with the threshold value contained in the transmission control information to detect abnormal data transmission; and
a transmission regulating unit configured to restrict data transmission upon detection of the abnormal data transmission.
2. The system of claim 1, wherein the transmission control information includes at least one of an acceptable traffic volume and a number of messages per unit time as the threshold value, as well as a unit time designated for each of the traffic volume and the number of messages.
3. A mobile device comprising:
a download controller configured to download an application program containing transmission control information from a server;
a management table configured to record the transmission control information extracted from the downloaded application program;
a counter configured to count a number of messages or traffic volume per unit time;
a detector configured to compare the counted value with the threshold value contained in the transmission control information to detect abnormal data transmission; and
a transmission regulating unit configured to restrict data transmission upon detection of the abnormal data transmission.
4. The mobile device of claim 3, wherein the transmission control information includes at least one of an acceptable traffic volume and a number of messages per unit time as the threshold value, as well as a unit time designated for each of the traffic volume and the number of messages.
5. The mobile device of claim 4, wherein the transmission control information further includes an operation to be carried out when the abnormal data transmission is detected in association with the application program.
6. The mobile device of claim 3, further comprising:
an application execution controller configured to carry out a prescribed operation upon detection of the abnormal data transmission.
7. The mobile device of claim 6, wherein the transmission control information further includes an operation to be carried out when the abnormal data transmission is detected, and the application execution controller carries out the operation according to the transmission control information upon detection of the abnormal data transmission.
8. The mobile device of claim 3, wherein the counter is configured to count the number of messages or the traffic volume within the unit time from generation of a data transmission request tracking back to a past.
9. The mobile device of claim 3, wherein if the counter is not activated with generation of a data transmission request, the counter is activated to count the number of messages or the traffic volume until the time is up based on elapse of the unit time.
10. The mobile device of claim 3, wherein the counter is configured to count the number of messages or the traffic volume every said unit time from start of the application program.
11. A program product installed in a mobile device and causing the mobile device to perform the process of:
extracting transmission control information from an application program downloaded from a server;
recording the transmission control information in association with the application program in a management table;
counting a number of messages or traffic volume per unit time upon generation of a transmission request;
comparing the counted value with a threshold value contained in the transmission control information to detect abnormal data transmission; and
restricting data transmission upon detection of the abnormal data transmission.
12. The program product of claim 11, causing the mobile device to further perform the process of:
carrying out a prescribed operation defined in the transmission control information upon detection of the abnormal data transmission.
13. A server comprising:
a receiving unit configured to receive a report of abnormal data transmission, the transmission having occurred during execution of an application program at a mobile device; and
a storage unit configured to store the abnormal data transmission report in association with the application program.
14. The server of claim 13, further comprising:
a download controller configured to allow the application program to be downloaded to the mobile device in response to a request from the mobile device;
wherein the application program contains transmission control information including a threshold value used to detect the abnormal data transmission.