JP2019194667A5

JP2019194667A5 -

Info

Publication number: JP2019194667A5
Application number: JP2018201162A
Authority: JP
Filing date: 2018-10-25
Publication date: 2021-11-25
Anticipated expiration: 2038-10-25

Description

本発明によれば、たとえば、
光を出力する発光手段と、
前記発光手段から出力された前記光を反射する反射部材と、
前記反射部材からの反射光を受光する受光手段であって、前記発光手段から前記受光手段に至るまでに一回以上にわたりシートが搬送される搬送路を横切ってきた光である前記反射光を受光する受光手段と、
前記受光手段が受光量に応じて出力する検知信号に基づき、前記搬送路を光が横切る位置にシートが到着しうる期間において当該位置にシートがあるかどうかを検知する検知手段と、
空気を送る送風手段であって、前記空気が前記反射部材に対して送られる、送風手段と、
前記シートが前記位置に到着する前の期間において前記受光手段が出力した検知信号に応じて、前記送風手段の風量と稼働時間とのうちの少なくとも一方を調整する制御手段と、を有することを特徴とする画像形成装置が提供される。 According to the present invention, for example
Light emitting means that outputs light and
A reflective member that reflects the light output from the light emitting means,
It is a light receiving means that receives the reflected light from the reflecting member, and receives the reflected light that has crossed the transport path through which the sheet is conveyed one or more times from the light emitting means to the light receiving means. Light receiving means and
A detection means for the light receiving unit detects whether the seat is in the position in the detection signal based on the period during which the sheet can arrive the conveyance path to the light traverses a position to be output in accordance with the received light amount,
A blowing means for sending air, the air is sent to the reflecting member, and the blowing means,
It is characterized by having a control means for adjusting at least one of the air volume and the operating time of the blower means according to the detection signal output by the light receiving means in the period before the sheet arrives at the position. An image forming apparatus is provided.

Claims

Light emitting means that outputs light and
A reflective member that reflects the light output from the light emitting means,
It is a light receiving means that receives the reflected light from the reflecting member, and receives the reflected light that has crossed the transport path through which the sheet is conveyed one or more times from the light emitting means to the light receiving means. Light receiving means and
A detection means for the light receiving unit detects whether the seat is in the position in the detection signal based on the period during which the sheet can arrive the conveyance path to the light traverses a position to be output in accordance with the received light amount,
A blowing means for sending air, the air is sent to the reflecting member, and the blowing means,
It is characterized by having a control means for adjusting at least one of the air volume and the operating time of the blower means according to the detection signal output by the light receiving means in the period before the sheet arrives at the position. Image forming device.

The control means is
If the level of the detection signal does not exceed the dew condensation threshold, the air volume of the blower means is increased or the blower by the blower means is continued.
The image forming apparatus according to claim 1, wherein when the level of the detection signal exceeds the dew condensation threshold value, the air volume of the air blowing means is reduced or the air blown by the air blowing means is stopped.

Further having a measuring means for measuring the operating time of the blowing means,
When the level of the detection signal does not exceed the dew condensation threshold value even if the operating time measured by the measuring means exceeds a predetermined time, the control means reduces the air volume of the blowing means or reduces the air volume of the blowing means. The image forming apparatus according to claim 2, wherein the blowing by the blowing means is stopped.

The control means operates the ventilation means while the image forming apparatus forms an image on the sheet, and when the image forming apparatus finishes forming an image on the sheet, a position where light crosses in the transport path. One of claims 1 to 3, wherein at least one of the air volume and the operating time of the blowing means is adjusted according to the detection signal output by the light receiving means when there is no sheet. The image forming apparatus according to.

The control means emits light when power is supplied from a power source to activate the image forming apparatus, or when the image forming apparatus returns from a state in which image forming is not performed to a state in which image forming can be performed. The image forming apparatus according to claim 1, wherein the means is made to output light, and the blowing means is driven or stopped according to a detection signal output by the light receiving means.

The control means is
If the level of the detection signal does not exceed the dew condensation threshold value, the air blown by the blowing means is started, or the air volume of the blowing means is increased.
The image forming apparatus according to claim 5, wherein when the level of the detection signal exceeds the dew condensation threshold value, the air volume of the air blowing means is reduced or the air is not blown by the air blowing means.

The control means emits light when power is supplied from a power source to activate the image forming apparatus, or when the image forming apparatus returns from a state in which image forming is not performed to a state in which image forming can be performed. While causing the means to output light, the blowing means is started to blow, and the blowing means is stopped according to the detection signal output by the light receiving means, or the light emitting amount of the light emitting means or the gain of the light receiving means. The image forming apparatus according to claim 1, wherein the image forming apparatus is adjusted.

The control means is
If the level of the detection signal is not equal to or higher than the lower limit of the predetermined range, the blowing by the blowing means is continued.
The image formation according to claim 7, wherein when the level of the detection signal is equal to or higher than the lower limit of the predetermined range, the air volume of the blowing means is reduced or the blowing by the blowing means is stopped. Device.

Further having a measuring means for measuring the operating time of the blowing means,
The control means increases the amount of light emitted by the light emitting means when the level of the detection signal is not equal to or higher than the lower limit of the predetermined range even if the operating time measured by the measuring means exceeds a predetermined time. The image forming apparatus according to claim 8, wherein the gain of the light receiving means is increased.

The control means is characterized by increasing the gain of the light receiving means when the level of the detection signal is not equal to or higher than the lower limit of the predetermined range even if the light emitting amount of the light emitting means is increased to a settable maximum value. The image forming apparatus according to claim 9.

The control means is characterized in that even if the gain of the light receiving means is increased to a maximum value that can be set, the amount of light emitted by the light emitting means is increased if the level of the detection signal is not equal to or higher than the lower limit of the predetermined range. The image forming apparatus according to claim 9.

Further having a storage means for storing the amount of light emitted by the light emitting means as an initial value when the level of the detection signal falls within the predetermined range.
The image forming apparatus according to claim 9, wherein the control means sets an initial value stored in the storage means in the light emitting means when the light emitting means starts to emit light.

Further having a storage means for storing the gain of the light receiving means as an initial value when the level of the detection signal falls within the predetermined range.
The image forming apparatus according to claim 9, wherein the control means sets an initial value stored in the storage means in the light receiving means when the light receiving means is started to receive light.

1. The image forming apparatus according to any one of 13 to 13.

It further has a first guide member and a second guide member which are provided facing each other in the transport path and guide the seat.
The light emitting means and the light receiving means are fixed to the first guide member.
The image forming apparatus according to any one of claims 1 to 14, wherein the reflective member is fixed to the second guide member.

The image forming apparatus according to any one of claims 1 to 15, further comprising a light-shielding member provided between the light-emitting means and the light-receiving means.

Further having a transport guide member forming the transport path,
The image forming apparatus according to any one of claims 1 to 16, wherein the blowing means sends air to each of the reflecting member and the transport guide member.

The transport path is an inverted transport path in which the image forming surface of the sheet is inverted from the first surface to the second surface in order to form an image on the second surface of the sheet on which the image is formed on the first surface. The image forming apparatus according to claim 17, wherein the image forming apparatus is provided.

With the reversing roller provided in the reversing transport path,
Further having an opening provided in the inverted transport path and communicating with the outside of the image forming apparatus.
The image forming apparatus according to claim 18, wherein the blowing means is arranged so that the air blown by the blowing means is discharged to the outside of the image forming apparatus through the opening.

An image forming means for forming an image on a sheet,
A fixing means for fixing the image to the sheet by applying heat to the image formed by the image forming means.
A transport guide member forming a transport path for transporting the sheet that has passed through the fixing means, and a transport guide member.
Light emitting means that outputs light and
A light receiving means that receives the light output from the light emitting means, and receives the light that has crossed the transport path one or more times from the light emitting means to the light receiving means.
Based on the detection signal output by the light receiving means according to the amount of light received, the detecting means for detecting whether or not the sheet is present at the position where the sheet can reach the position where the light crosses in the transport path.
A blowing means for sending air, the air is sent to the conveyance guide member, and blowing means,
It is characterized by having a control means for adjusting at least one of the air volume and the operating time of the blower means according to the detection signal output by the light receiving means in the period before the sheet arrives at the position. Image forming device.

The image forming apparatus according to claim 20, wherein the light emitting means and the light receiving means are arranged so as to face each other with the transport path interposed therebetween.

It further has a reflective member that reflects the light output by the light emitting means.
The image forming apparatus according to claim 20, wherein the light receiving means is arranged so as to receive the reflected light from the reflecting member.

The transport path is an inverted transport path in which the image forming surface of the sheet is inverted from the first surface to the second surface in order to form an image on the second surface of the sheet on which the image is formed on the first surface. The image forming apparatus according to claim 20, wherein the image forming apparatus is provided.

With the reversing roller provided in the reversing transport path,
Further having an opening provided in the inverted transport path and communicating with the outside of the image forming apparatus.
23. The image forming apparatus according to claim 23, wherein the blowing means is arranged so that the air sent by the blowing means is discharged to the outside of the image forming apparatus through the opening.

The control means adjusts at least one of the operating time and the air volume of the blower means according to the detection signal output by the light receiving means and the number of sheets that have continuously passed through the fixing means. The image forming apparatus according to any one of claims 20 to 24.

An image forming means for forming an image on a sheet,
A fixing means for fixing the image to the sheet by applying heat to the image formed by the image forming means.
A transport guide member forming a transport path for transporting the sheet that has passed through the fixing means, and a transport guide member.
Light emitting means that outputs light and
A light receiving means that receives the light output from the light emitting means, and receives the light that has crossed the transport path one or more times from the light emitting means to the light receiving means.
Based on the detection signal output by the light receiving means according to the amount of light received, the detecting means for detecting whether or not the sheet is present at the position where the sheet can reach the position where the light crosses in the transport path.
A curl correction means for correcting curls generated on the sheet by passing through the fixing means, and a curl correction means.
An image forming apparatus comprising: a control means for controlling the curl correction means in response to the detection signal output by the light receiving means in the period before the sheet arrives at the position.

The image forming apparatus according to claim 26, wherein the control means adjusts the amount of curl correction by the curl correction means according to the detection signal output by the light receiving means.

Light emitting means that outputs light and
A reflective member that reflects the light output from the light emitting means,
It is a light receiving means that receives the reflected light from the reflecting member, and receives the reflected light that has crossed the transport path through which the sheet is conveyed one or more times from the light emitting means to the light receiving means. Light receiving means and
Based on the detection signal output by the light receiving means according to the amount of light received, the detecting means for detecting whether or not the sheet is present at the position where the light can reach the position where the light crosses the transport path.
Blower means for sending air, wherein the air is sent to the reflective member.
An image characterized by having a control means for adjusting at least one of the air volume and the operating time of the blower means according to the detection signal output by the light receiving means during the period when the sheet is not conveyed. Forming device.