JP2016095543A5 - - Google Patents
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（１）記録材を収容する収容部と、記録材を搬送する第一搬送部と、記録材の搬送方向において前記第一搬送部よりも下流側に設けられ、記録材の先端を検知する第一検知部と、前記搬送方向において前記第一検知部よりも下流側に設けられ、前記第一搬送部によって搬送された記録材を搬送する第二搬送部と、前記搬送方向において前記第二搬送部よりも下流側に設けられ、記録材の先端を検知する第二検知部と、前記搬送方向において前記第二検知部よりも下流側に設けられ、像担持体に形成された画像を記録材に転写する転写部と、前記第一搬送部及び前記第二搬送部を駆動する同一の駆動源と、前記第一検知部又は前記第二検知部の検知結果に基づいて、前記駆動源を制御する制御部と、を有する画像形成装置において、第一記録材の後端と前記第一記録材の次に搬送される第二記録材の先端の間の搬送路上における距離が、前記第一検知部と前記第二検知部の間の搬送路上における距離以上の第一の距離となるように、前記第一記録材と前記第二記録材が前記収容部から前記転写部に向けて搬送される場合であって、前記第一検知部が、前記第一記録材の後端通過後、前記第二記録材の先端を検知することによって得られる信号が、前記第一記録材の後端と前記第二記録材の先端の間の前記距離が前記第一の距離よりも長く、前記第一の距離よりも長い第二の距離よりも短い状態であることを示している場合、前記制御部は前記駆動源を制御して、前記第二記録材の先端が前記第二検知部を通過した以後のタイミングで前記第二記録材の搬送速度を所定の速度から前記所定の速度よりも速い速度に変更し、前記信号が、前記第一記録材の後端と前記第二記録材の先端の間の前記距離が前記第二の距離よりも長い状態であることを示している場合、前記制御部は前記駆動源を制御して、前記第二記録材の先端が前記第二検知部に到達する前に前記第二記録材の搬送速度を前記所定の速度から前記所定の速度よりも速い速度に変更することを特徴とする画像形成装置。
（２）記録材を搬送する搬送部と、記録材の到達を検知する第一検知部と、記録材の搬送方向において前記第一検知部よりも下流側に設けられ、記録材の到達を検知する第二検知部と、前記搬送方向において前記第二検知部よりも下流側に設けられ、像担持体に形成された画像を記録材に転写する転写部と、前記搬送部を駆動する駆動源と、前記第一検知部又は前記第二検知部の検知結果に基づいて、前記駆動源を制御する制御部と、を有する画像形成装置において、前記第一検知部によって記録材を検知したタイミングと基準のタイミングとの差分の時間の長さが所定の時間の長さよりも短い場合、前記制御部は前記第二検知部によって記録材を検知した前記タイミングに応じて前記駆動源を制御して、記録材の搬送速度を所定の速度から前記所定の速度とは異なる速度に変更し、前記差分の時間の長さが前記所定の時間の長さよりも長い場合、前記制御部は前記第一検知部によって記録材を検知した前記タイミングに応じて前記駆動源を制御して、記録材の搬送速度を前記所定の速度から前記所定の速度とは異なる速度に変更することを特徴とする画像形成装置。
(1) and a storage portion for storing a recording material, a first conveying section for conveying a record material, provided on the lower stream side of the first conveying section in the conveying direction of the recording material, the tip end of the recording material a first detector for detecting the than the first detection unit in the conveying direction is provided on the downstream side, and a second conveying section you conveying the recording material conveyed by the first conveying unit, in the transport direction disposed downstream of the second conveying portion, and a second detector for detecting the tip end of the recording material, than the second detection portion in the transport direction is provided on the downstream side, is formed on an image bearing member Based on the detection result of the transfer unit that transfers the image to the recording material , the same drive source that drives the first conveyance unit and the second conveyance unit, and the first detection unit or the second detection unit , in the image forming apparatus and a control unit that Gyosu braking the driving source, the first recording member The distance on the transport path between the rear end and the front end of the second recording material transported next to the first recording material is greater than the distance on the transport path between the first detection unit and the second detection unit. The first recording material and the second recording material are transported from the storage portion toward the transfer portion so that the first recording material is the first recording material. A signal obtained by detecting the leading edge of the second recording material after passing through the trailing edge of the second recording material, the distance between the trailing edge of the first recording material and the leading edge of the second recording material is the first distance. Longer than the first distance and shorter than the second distance, the control unit controls the drive source so that the leading edge of the second recording material is the plant the transport speed of the second recording medium from a predetermined speed in the subsequent timing that has passed through the second sensing unit And the signal indicates that the distance between the trailing edge of the first recording material and the leading edge of the second recording material is longer than the second distance. The control unit controls the drive source so that the transport speed of the second recording material is changed from the predetermined speed to the predetermined speed before the leading edge of the second recording material reaches the second detection unit. An image forming apparatus characterized by changing to a speed faster than
(2) A conveyance unit that conveys the recording material, a first detection unit that detects the arrival of the recording material, and a downstream of the first detection unit in the conveyance direction of the recording material, and detects the arrival of the recording material A second detection unit that performs recording, a transfer unit that is provided downstream of the second detection unit in the transport direction and transfers an image formed on the image carrier to a recording material, and a drive source that drives the transport unit And a control unit that controls the drive source based on a detection result of the first detection unit or the second detection unit, and a timing at which the recording material is detected by the first detection unit, When the time length of the difference from the reference timing is shorter than the predetermined time length, the control unit controls the drive source according to the timing when the recording material is detected by the second detection unit, The recording material transport speed is reduced from the specified speed. When the speed is changed to a speed different from the predetermined speed and the time length of the difference is longer than the predetermined time length, the control section responds to the timing when the recording material is detected by the first detection section. And controlling the drive source to change the conveying speed of the recording material from the predetermined speed to a speed different from the predetermined speed.
Claims (13)
記録材を搬送する第一搬送部と、
記録材の搬送方向において前記第一搬送部よりも下流側に設けられ、記録材の先端を検知する第一検知部と、
前記搬送方向において前記第一検知部よりも下流側に設けられ、前記第一搬送部によって搬送された記録材を搬送する第二搬送部と、
前記搬送方向において前記第二搬送部よりも下流側に設けられ、記録材の先端を検知する第二検知部と、
前記搬送方向において前記第二検知部よりも下流側に設けられ、像担持体に形成された画像を記録材に転写する転写部と、
前記第一搬送部及び前記第二搬送部を駆動する同一の駆動源と、
前記第一検知部又は前記第二検知部の検知結果に基づいて、前記駆動源を制御する制御部と、を有する画像形成装置において、
第一記録材の後端と前記第一記録材の次に搬送される第二記録材の先端の間の搬送路上における距離が、前記第一検知部と前記第二検知部の間の搬送路上における距離以上の第一の距離となるように、前記第一記録材と前記第二記録材が前記収容部から前記転写部に向けて搬送される場合であって、
前記第一検知部が、前記第一記録材の後端通過後、前記第二記録材の先端を検知することによって得られる信号が、前記第一記録材の後端と前記第二記録材の先端の間の前記距離が前記第一の距離よりも長く、前記第一の距離よりも長い第二の距離よりも短い状態であることを示している場合、前記制御部は前記駆動源を制御して、前記第二記録材の先端が前記第二検知部を通過した以後のタイミングで前記第二記録材の搬送速度を所定の速度から前記所定の速度よりも速い速度に変更し、
前記信号が、前記第一記録材の後端と前記第二記録材の先端の間の前記距離が前記第二の距離よりも長い状態であることを示している場合、前記制御部は前記駆動源を制御して、前記第二記録材の先端が前記第二検知部に到達する前に前記第二記録材の搬送速度を前記所定の速度から前記所定の速度よりも速い速度に変更することを特徴とする画像形成装置。 A storage section for storing the recording material;
A first conveying unit for conveying the record member,
Provided on the lower stream side of the first conveying section in the conveying direction of the recording material, a first detector for detecting the tip end of the recording material,
The than the first detection unit in the conveying direction is provided on the downstream side, and a second conveying section you conveying the recording material conveyed by the first conveying section,
Disposed downstream of the second conveying unit in the conveying direction, and a second detector for detecting the tip end of the recording material,
A transfer unit that is provided on the downstream side of the second detection unit in the transport direction and transfers an image formed on the image carrier to a recording material ;
The same drive source for driving the first transport unit and the second transport unit;
Wherein the first sensing unit or on the basis of the detection result of the second detecting unit, an image forming apparatus and a control unit that Gyosu braking said drive source,
The distance on the transport path between the rear end of the first recording material and the front end of the second recording material transported next to the first recording material is on the transport path between the first detection unit and the second detection unit. The first recording material and the second recording material are transported from the storage portion toward the transfer portion so as to be a first distance equal to or greater than
A signal obtained by the first detection unit detecting the leading edge of the second recording material after passing the trailing edge of the first recording material generates a signal of the trailing edge of the first recording material and the second recording material. When the distance between the tips indicates that the distance is longer than the first distance and shorter than the second distance that is longer than the first distance, the control unit controls the drive source. Then, the conveyance speed of the second recording material is changed from a predetermined speed to a speed higher than the predetermined speed at a timing after the leading edge of the second recording material passes through the second detection unit,
When the signal indicates that the distance between the rear end of the first recording material and the front end of the second recording material is longer than the second distance, the control unit performs the driving Controlling the source to change the conveying speed of the second recording material from the predetermined speed to a speed higher than the predetermined speed before the leading edge of the second recording material reaches the second detection unit. An image forming apparatus.
前記信号が、前記第一記録材の後端と前記第二記録材の先端の間の前記距離が前記第二の距離よりも長い状態であることを示している場合、前記制御部は前記第一検知部によって前記第二記録材の先端を検知したタイミングに基づいて前記第二記録材の搬送速度及び搬送時間を算出し、算出した前記搬送速度及び前記搬送時間で前記第二記録材を搬送させるように前記駆動源を制御することを特徴とする請求項１に記載の画像形成装置。 The signal indicates that the distance between the trailing edge of the first recording material and the leading edge of the second recording material is longer than the first distance and shorter than the second distance. case, the control unit calculates the conveying speed and the conveying time of the second recording member based on the timing of detecting the tip end of the second recording medium by said second detection section, calculated the transport speed and the transport Controlling the drive source to transport the second recording material in time,
When the signal indicates that the distance between the trailing edge of the first recording material and the leading edge of the second recording material is longer than the second distance, the control unit The transport speed and transport time of the second recording material are calculated based on the timing at which the leading edge of the second recording material is detected by one detection unit, and the second recording material is transported at the calculated transport speed and transport time. The image forming apparatus according to claim 1 , wherein the drive source is controlled so as to cause the image to be generated.
前記信号が、前記第一記録材の後端と前記第二記録材の先端の間の前記距離が前記第二の距離よりも長い状態であることを示している場合、前記制御部は前記第一検知部によって前記第二記録材の先端を検知したタイミングから前記駆動源を制御して、前記第二記録材の速度の加速を開始させることを特徴とする請求項２に記載の画像形成装置。 The signal indicates that the distance between the trailing edge of the first recording material and the leading edge of the second recording material is longer than the first distance and shorter than the second distance. case, the control unit controls the driving source from the timing of detecting the tip end of the second recording member I by the second detection unit, to start the acceleration of the speed of said second recording medium,
When the signal indicates that the distance between the trailing edge of the first recording material and the leading edge of the second recording material is longer than the second distance, the control unit 3. The image forming apparatus according to claim 2 , wherein the drive source is controlled from a timing at which the leading edge of the second recording material is detected by one detection unit, and acceleration of the speed of the second recording material is started. .
記録材の到達を検知する第一検知部と、
記録材の搬送方向において前記第一検知部よりも下流側に設けられ、記録材の到達を検知する第二検知部と、
前記搬送方向において前記第二検知部よりも下流側に設けられ、像担持体に形成された画像を記録材に転写する転写部と、
前記搬送部を駆動する駆動源と、
前記第一検知部又は前記第二検知部の検知結果に基づいて、前記駆動源を制御する制御部と、を有する画像形成装置において、
前記第一検知部によって記録材を検知したタイミングと基準のタイミングとの差分の時間の長さが所定の時間の長さよりも短い場合、前記制御部は前記第二検知部によって記録材を検知した前記タイミングに応じて前記駆動源を制御して、記録材の搬送速度を所定の速度から前記所定の速度とは異なる速度に変更し、
前記差分の時間の長さが前記所定の時間の長さよりも長い場合、前記制御部は前記第一検知部によって記録材を検知した前記タイミングに応じて前記駆動源を制御して、記録材の搬送速度を前記所定の速度から前記所定の速度とは異なる速度に変更することを特徴とする画像形成装置。 And a transport unit for transporting the serial Rokuzai,
A first detector for detecting the arrival of the serial Rokuzai,
A second detection unit that is provided downstream of the first detection unit in the conveyance direction of the recording material and detects the arrival of the recording material;
A transfer unit that is provided on the downstream side of the second detection unit in the transport direction and transfers an image formed on the image carrier to a recording material;
A drive source for driving the transport unit;
Before SL based on the first detection portion or the second detection portion of the detection results, an image forming apparatus and a control unit for controlling the drive source,
When the time length of the difference between the timing at which the first detection unit detects the recording material and the reference timing is shorter than the predetermined time length, the control unit detects the recording material by the second detection unit . The drive source is controlled according to the timing, and the recording material conveyance speed is changed from a predetermined speed to a speed different from the predetermined speed.
When the time length of the difference is longer than the predetermined time length, the control unit controls the driving source according to the timing when the recording material is detected by the first detection unit , An image forming apparatus , wherein the conveyance speed is changed from the predetermined speed to a speed different from the predetermined speed .
前記第一検知部によって記録材を検知した前記タイミングが前記基準のタイミングよりも遅く、前記差分の時間の長さが前記所定の時間の長さよりも長い場合、前記制御部は前記第一検知部によって記録材を検知した前記タイミングに応じて前記駆動源を制御して、記録材の搬送速度を前記所定の速度から前記所定の速度よりも速い速度に変更することを特徴とする請求項７に記載の画像形成装置。 When the timing at which the recording material is detected by the first detection unit is later than the reference timing and the time length of the difference is shorter than the predetermined time length, the control unit is provided with the second detection unit. wherein by controlling the drive source, to change the conveying speed of the recording material from a predetermined speed to a speed higher than the predetermined speed in accordance with the timing of detecting the recording material I by the,
When the timing when the recording material is detected by the first detection unit is later than the reference timing and the time length of the difference is longer than the predetermined time length, the control unit is the first detection unit 8. The recording material conveyance speed is changed from the predetermined speed to a speed higher than the predetermined speed by controlling the drive source in accordance with the timing at which the recording material is detected by the control method according to claim 7. The image forming apparatus described.
前記第一検知部によって記録材を検知した前記タイミングが前記基準のタイミングよりも遅く、前記差分の時間の長さが前記所定の時間の長さよりも長い場合、前記制御部は前記第一検知部によって記録材を検知した前記タイミングに基づいて記録材の搬送速度及び搬送時間を算出し、算出した前記搬送速度及び前記搬送時間で記録材を搬送させるように前記駆動源を制御することを特徴とする請求項８に記載の画像形成装置。 When the timing at which the recording material is detected by the first detection unit is later than the reference timing and the time length of the difference is shorter than the predetermined time length, the control unit is provided with the second detection unit. Therefore it based on the said timing of detecting the recording medium to calculate the conveying speed and the conveyance time of the recording material, and controls the drive source so as to convey the recording material with the calculated the transport speed and the transport time,
When the timing when the recording material is detected by the first detection unit is later than the reference timing and the time length of the difference is longer than the predetermined time length, the control unit is the first detection unit A recording material conveyance speed and a conveyance time are calculated based on the timing at which the recording material is detected, and the drive source is controlled to convey the recording material at the calculated conveyance speed and the conveyance time. The image forming apparatus according to claim 8 .
前記第一検知部によって記録材を検知した前記タイミングが前記基準のタイミングよりも遅く、前記差分の時間の長さが前記所定の時間の長さよりも長い場合、前記制御部は前記第一検知部によって記録材を検知した前記タイミングから前記駆動源を制御して、記録材の速度の加速を開始させることを特徴とする請求項９に記載の画像形成装置。When the timing when the recording material is detected by the first detection unit is later than the reference timing and the time length of the difference is longer than the predetermined time length, the control unit is the first detection unit The image forming apparatus according to claim 9, wherein the drive source is controlled from the timing at which the recording material is detected by the step of accelerating the speed of the recording material.
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| JP2002059601A (en) * | 2000-08-22 | 2002-02-26 | Canon Inc | Imaging apparatus |
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