WO2018110630A1

WO2018110630A1 - Image recording device

Info

Publication number: WO2018110630A1
Application number: PCT/JP2017/044842
Authority: WO
Inventors: 直也駒田
Original assignee: コニカミノルタ株式会社
Priority date: 2016-12-16
Filing date: 2017-12-14
Publication date: 2018-06-21
Also published as: EP3556696B1; JPWO2018110630A1; EP3556696A1; JP7070430B2; EP3556696A4

Abstract

Provided is an image recording device whereby, without increasing the size of the image recording device, a recording medium can be peeled within a suitable range after reading out an image. An inkjet recording device (1) is provided with: a transfer unit (10) that transfers a recording medium P by adhering the recording medium to a transfer surface; an image recording unit (20) that records an image on the recording medium adhered to the transfer surface; a readout unit (30) that reads out the surface of the recording medium in the downstream of an image recording operation range of the image recording unit in a recording medium transfer path of the transfer unit, said downstream being in the recording medium transfer direction of the transfer unit; a peeling operation unit (60) that peels the recording medium by peeling the recording medium from the transfer surface, said recording medium having been adhered to the transfer surface; and a medium detection unit (50) that detects a peeling state of the recording medium from the transfer surface, said peeling state being detected in the downstream of the readout operation range of the readout unit in the transfer direction.

Description

Image recording device

The present invention relates to an image recording apparatus.

Conventionally, there is an image recording apparatus (inkjet recording apparatus) that records an image on a recording medium by landing ejected ink. In an ink jet recording apparatus, an image can be recorded on a wide range of media by using various inks. The recording medium targeted by such an ink jet recording apparatus includes a long recording medium such as continuous paper or fabric.

When recording an image on such a long recording medium, the recording medium is placed on a conveying member such as a conveying belt and conveyed, and is moved relative to a recording unit provided with a nozzle for discharging ink. . In order to prevent the recording medium from being lifted or displaced from the conveying member, there are various techniques for adsorbing or sticking the recording medium to the conveying member. When the recording medium is adhered to the transport member using this technique, the recording medium needs to be peeled off from the transport member after the image is recorded. On the other hand, conventionally, a peeling roller is provided at a position separated in a direction perpendicular to the mounting surface of the recording medium in the conveying member, and the recording medium is peeled off from the recording medium by the rotation of the peeling roller. The technique of winding while applying force is used.

In addition, the ink jet recording apparatus is provided with a reading unit such as an image sensor that picks up an image on the downstream side in the conveyance direction of the recording medium from the image recording position by the ink jet head, and inspects the recorded image or reads the read result. There is a technique for controlling the timing of performing various operations related to image recording operations and recording unit maintenance. In this case, the peeling operation is performed downstream of the reading position by the reading unit with respect to the recording medium adhered to the conveyance surface (for example, Patent Document 1).

International Publication No. 2013/161622

However, when the recording medium is peeled off by being peeled from the conveying member, there is a problem that it is difficult to reliably maintain an appropriate peeling position with the conventional technology. When peeling the recording medium after reading the image, it is necessary to peel the recording medium at a position that does not affect the reading of the image. There is a problem that it becomes longer and leads to an increase in the size of the image recording apparatus.

An object of the present invention is to provide an image recording apparatus capable of peeling a recording medium in an appropriate range after reading an image without increasing the size of the image recording apparatus.

In order to achieve the above object, the invention according to claim 1
A transport unit that transports the recording medium by adhering it to the transport surface;
A recording unit for recording an image on a recording medium adhered to the conveyance surface;
A reading unit that reads the surface of the recording medium on the downstream side in the conveyance direction of the recording medium by the conveyance unit from the recording operation range of the image by the recording unit in the conveyance path of the recording medium by the conveyance unit;
A peeling operation unit for peeling the recording medium adhered to the transport surface by peeling the recording medium from the transport surface;
A detection unit that detects a peeling state of the recording medium from the conveyance surface on the downstream side in the conveyance direction with respect to a reading operation range by the reading unit;
Is an image recording apparatus.

According to a second aspect of the present invention, in the image recording apparatus of the first aspect,
The detection unit includes a light emitting unit and a light receiving unit that detects light emitted from the light emitting unit,
The peeling state is detected by changing the incident state of the emitted light to the light receiving portion according to whether or not the recording medium is lifted off from the conveyance surface.

According to a third aspect of the present invention, in the image recording apparatus according to the second aspect,
The path of the emitted light is determined in a direction oblique to the width direction perpendicular to the transport direction within the transport direction and a plane parallel to the transport surface.

According to a fourth aspect of the present invention, in the image recording apparatus according to the second or third aspect,
The detection unit has two light receiving units, and the two light receiving units have a recording medium peeling position within a predetermined peeling range in the transport direction in accordance with a combination of detection results of the emitted light by each. It is arranged so that it can be discriminated between the upstream side and the downstream side.

The invention according to claim 5 is the image recording apparatus according to claim 4,
The light emitting unit detects the emitted light on the upstream side with respect to the carrying direction from the emission position of the emitted light, and detects the emitted light on the downstream side in the carrying direction with respect to the emitting position. The emitted light is respectively emitted to the two light receiving parts with the downstream light receiving part.

According to a sixth aspect of the present invention, in the image recording apparatus according to the fourth or fifth aspect,
A control unit is provided for controlling the operation of the peeling operation unit so that the peeling position is within the predetermined peeling range based on the detection result of the detection unit.

According to a seventh aspect of the present invention, in the image recording apparatus of the sixth aspect,
The peeling operation unit pulls the recording medium away from the transport surface at a speed synchronized with the transport speed of the recording medium by the transport unit,
The controller changes the pulling speed based on a positional relationship between the peeling position and the predetermined peeling range.

The invention according to claim 8 is the image recording apparatus according to any one of claims 4 to 7,
A first peeling abnormality detection unit is provided that detects a peeling abnormality of the recording medium upstream of the predetermined peeling range and downstream of the reading operation range in the transport direction.

The invention according to claim 9 is the image recording apparatus according to any one of claims 4 to 8,
A second peeling abnormality detection unit that detects a peeling abnormality of the recording medium downstream of the predetermined peeling range in the transport direction is provided.

The invention according to claim 10 is the image recording apparatus according to any one of claims 1 to 9,
The transport surface is one surface of an endless member that circulates along a predetermined circulation path,
A vibration isolator that suppresses vibration of the endless member is provided between the reading operation range and the most downstream position in the predetermined peeling range in the transport direction.

The invention according to claim 11 is the image recording apparatus according to claim 10,
The vibration isolator has a roller that is provided in contact with the surface of the endless member opposite to the one surface and that rotates in accordance with the circumferential movement of the endless member.

According to the present invention, there is an effect that the recording medium can be peeled off in an appropriate range after reading the image without increasing the size in the image recording apparatus.

1 is a perspective view illustrating an overall configuration of an ink jet recording apparatus according to a first embodiment. It is a figure which shows typically the surface facing the conveyance surface of a head unit. It is a block diagram which shows the function structure of an inkjet recording device. It is a figure explaining the detection of a peeling condition. It is a figure explaining the detection of a peeling condition. It is a figure explaining the detection of a peeling condition. It is a figure explaining the detection of a peeling condition. It is a figure explaining the detection of a peeling condition. It is a flowchart which shows the control procedure of the peeling control process performed with the inkjet recording device of 1st Embodiment. It is a perspective view which shows the whole structure of the inkjet recording device of 2nd Embodiment. It is a flowchart which shows the control procedure of the peeling control process performed with the inkjet recording device of 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, the inkjet recording apparatus 1 which is 1st Embodiment of the image recording apparatus of this invention is demonstrated.
FIG. 1 is a perspective view showing the overall configuration of the inkjet recording apparatus 1 of the first embodiment.

The inkjet recording apparatus 1 includes a transport unit 10, an image recording unit 20 (recording unit), a reading unit 30, a control unit 40, a medium detection unit 50 (detection unit), a peeling operation unit 60, and the like.

The conveyance unit 10 includes a driving roller 11, a conveyance belt 12, a driven roller 13, a conveyance motor 14, an encoder 15, a pressing roller 16, a vibration isolation roller 19 (vibration isolation unit), and the like. The conveyor belt 12 is an endless member, is stretched between the drive roller 11 and the driven roller 13, and rotates around the circulation path as the drive roller 11 rotates by driving of the conveyor motor 14. By moving the outer peripheral surface (one surface) of the transport belt 12 as a transport surface relative to the image recording unit 20 in a predetermined transport direction, the transport unit 10 has the recording medium P placed on the transport surface. Is carried out at a predetermined carrying speed in the carrying direction. The transport belt 12 is made of a material that flexibly bends at the contact surface with the driving roller 11 and the driven roller 13 and that reliably supports the recording medium P. As such a conveyance belt 12, resin-made belts, such as rubber | gum, are mentioned, for example. The driven roller 13 rotates as the transport belt 12 moves.

The conveying belt 12 is formed and processed so as to prevent the recording medium P to be placed from floating up. For example, an adhesive that adheres the recording medium P is applied to the surface (conveyance surface) of the conveyance belt 12. The transport unit 10 transports the recording medium P by adhering to the transport surface upstream of the image recording position (recording operation range) where the image recording operation is performed by the image recording unit 20 in the transport direction. The transport unit 10 passes the reading range by the reading unit 30 on the transport path of the recording medium P (that is, the movement path from the time when the recording medium P is adhered to the transport surface until it is peeled off) by the peeling roller 61. By pulling the recording medium P at a predetermined strength or more in a direction away from the conveying belt 12 (upward in the drawing), the recording medium P is peeled off from the conveying surface. In addition, when the apparatus configuration itself of the reading unit 30 is larger (wide) in the transport direction than the reading range, when the recording medium P is peeled immediately after passing through the reading range, the recording medium P is read by the reading unit 30. The peeling position is a range (space) related to the reading operation including the arrangement range of the reading unit 30 and the optical path of light incident on the reading unit 30 from the reading range in addition to the reading range. It is determined to be after passing the range (reading operation range) in the entire conveyance direction. In addition, when the reading range is illuminated by illumination, a space through which the illumination light passes before reaching the reading range is also included in the reading operation range. The adhesive may be applied by a user or an administrator regularly or irregularly according to the adhesive state.

As the recording medium P, a medium continuous in the transport direction is used, and here is, for example, a fabric. A plurality of images recorded at appropriate intervals on the recording medium P are dried (fixed with ink) by a post-processing device (not shown), wound or shaken off, and / or each cut. .

The transport motor 14 rotates the drive roller 11 at a rotation speed according to a control signal from the control unit 40. The transport motor 14 can also rotate the drive roller 11 in the reverse direction to the normal transport direction. As a result, the transport belt 12 transports the recording medium P at a transport speed corresponding to the rotational speed of the drive roller 11.

Encoder 15 detects the conveyance speed of the recording medium P. Here, the encoder 15 is a rotary encoder that detects the rotational speed of the transport motor 14, but is not limited thereto.

The pressing roller 16 removes floating from the mounting surface such as wrinkles by pressing the recording medium P supplied to the mounting surface of the conveyor belt 12 against the mounting surface.

The anti-vibration roller 19 is rotatable in contact with the inner peripheral surface side (the surface opposite to the one surface) of the conveying belt 12 on the downstream side of the reading operation range where the reading operation is performed by the reading unit 30 in the conveying direction. By supporting the conveyor belt 12 from the inside while rotating in accordance with the circular movement of the conveyor belt 12, vibration of the conveyor belt 12 that occurs in response to the circular operation is suppressed. Here, the anti-vibration roller 19 is provided between the front light receiving unit 52 and the rear light receiving unit 53, which is a peeling range in which the recording medium P is normally peeled, in the transport direction, but on the upstream side from this. There may be.

The image recording unit 20 performs a recording operation of recording an image by ejecting ink from the nozzles and landing (applying) the ink on the upper surface of the recording medium P (the surface opposite to the side in contact with the conveying surface). The image recording unit 20 has a plurality of head units 21. From these head units 21, inks of different colors supplied from an ink storage section (not shown) are discharged. The number of head units 21 provided (that is, the number of ejected ink colors) and the type of ink color are not particularly limited, but here, as an example, four

head units

21Y, 21M, 21C, and 21K. Are shown, and ink of each color of yellow, magenta, cyan, and black is ejected from each. In each of the head units 21, nozzles are arranged one-dimensionally or two-dimensionally in a plane parallel to the conveyance surface, and the range in the width direction of the arrangement range is set to the recordable width of the recording medium P that can be conveyed by the conveyance belt 12. The line head is determined accordingly.

FIG. 2 is a diagram schematically showing a surface (nozzle surface) facing the transport surface of the head unit 21K.
Since the head units 21C, 21M, and 21Y have the same configuration, description thereof will be omitted.

The head unit 21K includes a plurality of discharge heads 211 in which nozzle openings are arranged at a predetermined interval (nozzle interval) on the bottom surface, here, for example, at an interval of about 70.6 μm corresponding to 360 dpi (dots per inch) (here, 16). The two ejection heads 211 form a set, and the nozzle openings of the ejection heads 211 are alternately arranged in the width direction, so that image recording with a recording resolution of 720 dpi (nozzle interval is about 35.3 μm) can be performed. It is possible. By further disposing this set of ejection heads 211 in a staggered pattern, a line head is formed in which nozzle openings are arranged over the above-mentioned recordable width at uniform intervals in the width direction. That is, in the inkjet recording apparatus 1, each head unit 21 is fixed during the image recording operation, and ink is sequentially ejected at predetermined intervals (intervals in the conveyance direction) to different positions in the conveyance direction according to the conveyance of the recording medium P. The image is recorded by the one-pass method. The interval in the conveyance direction, that is, the recording resolution in the conveyance direction is determined by the ejection frequency from the nozzles and the conveyance speed, but may be equal to or different from the above-described 720 dpi.

The reading unit 30 reads the surface of the recording medium P placed by the conveyor belt 12. The reading unit 30 includes an imaging sensor 31 (inline sensor), and is provided on the downstream side of the image recording position by the image recording unit 20 in the conveyance direction by the conveyance belt 12. Thereby, the reading unit 30 can read the image recorded on the recording medium P by the image recording unit 20. Although the imaging sensor 31 of the reading unit 30 is not particularly limited, here, the image sensor 31 is a line sensor that can read at once across the recordable width of the recording medium P in the width direction orthogonal to the transport direction. In the inkjet recording apparatus 1 according to the present embodiment, the data read by the reading unit 30 is recorded on the recording medium P by checking the image quality and image recording position of the recorded image on the recording medium P by the control unit 40, although not limited thereto. The image recording unit 20 is used for an operation inspection (nozzle ejection failure inspection or the like) based on the read result of the test image, or an abnormality detection of the recording medium P. The abnormality inspection of the recording medium P may include those based on the abnormality of the transport surface.

The control unit 40 performs overall control of the operation of each unit of the inkjet recording apparatus 1.

The medium detection unit 50 detects the peeling state of the recording medium P from the conveyance belt 12. The medium detection unit 50 includes a first light emitting unit 51 (light emitting unit), a front light receiving unit 52 (upstream light receiving unit), a rear light receiving unit 53 (downstream light receiving unit), a second light emitting unit 56, and an upstream abnormality. A detection light receiving unit 57 is provided. The first light emitting unit 51, the front light receiving unit 52, and the rear light receiving unit 53 (two light receiving units) are spaced from each other at a distance larger than the maximum width of the recording medium P that can be transported by the transport belt 12 in the width direction. 12 is provided near both side surfaces. The front light receiving unit 52 is provided at a position upstream of the first light emitting unit 51 (output position of the emitted light) in the transport direction and downstream of the above-described reading operation range by the reading unit 30. The light receiving unit 53 is provided at a position downstream of the first light emitting unit 51 (the emission position of the emitted light) in the transport direction. From the first light emitting unit 51, two light beams (or predetermined light beams) having directivity so as to cross the upper portion of the transport belt 12 with a predetermined angle of inclination with respect to the transport direction and the width direction (that is, in an oblique direction). On the path (optical axis) of the emitted light depending on whether or not the emitted light (emitted light) is detected by the front light receiving unit 52 and the rear light receiving unit 53, respectively. The state of peeling of the recording medium P is detected.

The second light emitting unit 56 and the upstream abnormality detection light receiving unit 57 are upstream of the first light emitting unit 51, the front light receiving unit 52, and the rear light receiving unit 53 in the transport direction and between the reading unit 30 (imaging sensor 31). When the peeling position of the recording medium P moves to the abnormal peeling position upstream of the normal peeling range (reference peeling range NA shown in FIG. 4A), the peeling abnormal state (here, the peeling is early). 1st peeling abnormality detection part which detects the state which passes) is comprised.

The first light emitting unit 51 and the second light emitting unit 56 emit light of appropriate wavelengths, respectively, and the front light receiving unit 52, the rear light receiving unit 53, and the upstream abnormality detection light receiving unit 57 are the first light emitting unit 51 and the second light emitting unit. The light of at least part of the light emitted from the unit 56 is detected.

The peeling operation unit 60 peels (peels off) the recording medium P that has been adhered and conveyed on the conveyance surface of the conveyance belt 12 of the conveyance unit 10 from the conveyance belt 12 to an unshown post-processing device. send. The peeling operation unit 60 includes a peeling roller 61, a peeling motor 62, and the like.

The peeling roller 61 pulls the recording medium P conveyed in a state of being adhered to the conveying belt 12 upward from the outer peripheral surface of the conveying belt 12 with a predetermined pressure in accordance with the rotation operation by the peeling motor 62, so that the recording medium P Is peeled off from the conveying surface and sent to the post-processing apparatus. The surface of the peeling roller 61 is preferably one having a large friction with the recording medium P, whereby a force for effectively peeling the recording medium P can be applied. Until the ink that has landed on the recording medium P is fixed and dried by the post-processing device, the peeling roller 61 prevents the image from being deteriorated by contact of the ink landing surface (image recording surface) of the recording medium P with a roller or the like. Contact is made only on the surface opposite to the image recording surface.

The peeling motor 62 rotates the peeling roller 61 at a rotation speed according to a control signal from the control unit 40. Normally, the peeling motor 62 rotates the peeling roller 61 so as to pull up the recording medium P at a speed synchronized with the conveyance speed of the recording medium P.

FIG. 3 is a block diagram showing a functional configuration of the inkjet recording apparatus 1 of the present embodiment.

The ink jet recording apparatus 1 includes a control unit 40, a storage unit 45, a transport motor 14 and an encoder 15 of the transport unit 10, a head driving unit 22 of the image recording unit 20, an image sensor 31 of a reading unit 30, and a medium. The first light emitting unit 51, the front light receiving unit 52, the rear light receiving unit 53, the second light emitting unit 56, the upstream abnormality detection light receiving unit 57 of the detection unit 50, the peeling motor 62 of the peeling operation unit 60, the communication unit 70, and the operation A display unit 80, a bus 90, and the like are provided.

The control unit 40 performs a control operation for overall control of the entire operation of the inkjet recording apparatus 1. The control unit 40 includes a CPU 41 (Central Processing Unit), a ROM 42 (Read Only Memory), a RAM 43 (Random Access Memory), and the like. The CPU 41 performs various arithmetic processes and executes processes related to various controls. The ROM 42 stores and saves control programs related to various controls. As the ROM 42, a mask ROM or a readable / writable nonvolatile memory is used.

The RAM 43 provides a working memory space to the CPU 41 and stores temporary data and various settings. As the RAM 43, various volatile memories such as SRAM and DRAM are used.

The storage unit 45 stores recording target image data (recording target data) acquired through the communication unit 70, processing data thereof, and the like. Further, the storage unit 45 may store various execution programs related to image recording and adjustment inspection, and the CPU 41 reads out and loads them into the RAM 43 when the execution programs are executed. As the storage unit 45, for example, an HDD (Hard Disk Drive) or a flash memory is used, and a RAM or the like may be used in combination.

The transport motor 14 rotates the drive roller 11 in accordance with a control signal from the control unit 40 to move the transport belt 12 around. The rotation speed of the transport motor 14 may be changeable according to the image quality required for the recorded image.

The head drive unit 22 outputs a drive signal for operating the ink discharge mechanism in the discharge head 211 of each head unit 21, and discharges ink from the opening of the target nozzle at an appropriate timing. These drive signals are output in parallel to each head unit 21 (discharge head 211). The drive signal is output in synchronization with an encoder (not shown) that measures the conveyance speed (position) of the recording medium P by the conveyance unit 10. As an ink discharge mechanism, for example, a voltage is applied to a piezoelectric element provided along an ink flow path communicating with a nozzle to deform the piezoelectric element, and pressure is applied to the ink in the ink flow path with a predetermined pressure pattern. In addition, a piezo-type device that discharges ink, or generates heat by flowing current through a heating wire, heats the ink in the ink flow path, and partially vaporizes it to change the volume and apply pressure to the ink. The thermal type etc. to be discharged are used.

The imaging sensor 31 is a line sensor as described above, and images the upper surface of the recording medium P (recording surface by the image recording unit 20) and outputs a one-dimensional image. The imaging sensor 31 can output a two-dimensional image of the upper surface of the recording medium P by capturing and outputting a one-dimensional image at a predetermined interval according to the conveyance speed of the recording medium P by the conveyance unit 10.

The first light emitting unit 51 and the second light emitting unit 56 emit predetermined light when the recording medium P is conveyed as described above. The light is preferably highly directional light, and is not particularly limited, but is, for example, laser light. Further, the wavelength of light is not particularly limited, but light having a small influence by external light is preferable. For example, infrared light or the like is used. Further, visible light, for example, red light may be emitted together with infrared light to indicate to the user or administrator that the light emitting operation of the first light emitting unit 51 and the second light emitting unit 56 is appropriately performed.

The front light receiving unit 52, the rear light receiving unit 53, and the upstream abnormality detection light receiving unit 57 detect incident light and output a signal (charge amount, voltage value, current value, etc.) corresponding to the incident light amount. The light receiving surfaces of the front light receiving unit 52, the rear light receiving unit 53, and the upstream abnormality detection light receiving unit 57 are substantially perpendicular to the optical axis (or the width direction) of the emitted light from the first light emitting unit 51 and the second light emitting unit 56. It is provided and detects at least a part of the wavelength of the emitted light. As described above, when the light from the infrared wavelength to the red wavelength is emitted, the front light receiving unit 52, the rear light receiving unit 53, and the upstream abnormality detection light receiving unit 57 detect only infrared light, It can be set as the structure which reduces the influence of external light. The front light receiving unit 52 and the rear light receiving unit 53 binarize a signal according to the amount of incident light with a predetermined reference value, and only information related to the presence or absence of light from the first light emitting unit 51 or the second light emitting unit 56 is obtained. It may be configured to output.

The peeling motor 62 rotates and moves the peeling roller 61. In accordance with a control signal from the control unit 40, the peeling motor 62 peels off the recording medium P that moves with the circular movement of the conveying belt 12 from the conveying belt 12, and Then, the peeling speed of the recording medium P is adjusted by changing the rotation speed.

The communication unit 70 acquires recording target image data and a print job from an external computer terminal or a print server, and outputs a status signal related to image recording.

The operation display unit 80 includes a display unit 81 that displays a user input operation reception screen and status information, and an operation reception unit 82 that receives a user input operation and outputs an operation signal to the control unit 40. Here, the operation display unit 80 includes, for example, a liquid crystal screen provided with a touch sensor and its driver. Alternatively, as the display unit 81, a display screen according to another display method such as an organic EL display may be used, or an LED lamp for status display may be used in combination. Further, as the operation reception unit 82, a push button switch, a rotation switch, or the like may be provided instead of or in addition to the touch panel.

The bus 90 is a transmission path for transmitting and receiving signals between the control unit 40 and other units.

Next, the peeling operation control of the recording medium P in the inkjet recording apparatus 1 of the present embodiment will be described.
In the ink jet recording apparatus 1 of the present embodiment, after the image recording operation by the image recording unit 20 and the reading operation (imaging operation) by the reading unit 30 are performed, the recording medium P adhered to the transport belt 12 is peeled off. In this case, the peeling position by the peeling roller 61 is determined by the magnitude relationship between the tensile stress and the adhesive force required for peeling, and is not necessarily fixed at a fixed position. Therefore, in the ink jet recording apparatus 1, the medium detection unit 50 detects whether or not the position range that does not adversely affect the reading operation, in particular, whether it is peeled downstream from the reading operation range by the reading unit 30.

4A, 4B, 5A, 5B, and 5C are diagrams for explaining detection of a peeling state.
4A and 4B are diagrams for explaining the detection status of the recording medium P in the case of normal peeling. 4A is a plan view seen from the side (upper side) facing the image recording surface of the recording medium P, and FIG. 4B is a front view seen from the width direction.
FIGS. 5A to 5C are front views for explaining the detection state of the recording medium P when the peeling position is out of the normal range.

Here, the path of the emitted light R2 from the first light emitting unit 51 to the rear light receiving unit 53 intersects the reference peeling range NA (predetermined peeling range) that is the normal peeling range of the recording medium P. It has been established. As a result, when the recording medium P is normally peeled at the peeling position C within the reference peeling range NA, as shown in FIGS. 4A and 4B, the output from the first light emitting portion 51 to the rear light receiving portion 53 is achieved. The incident light R <b> 2 is blocked at a position D on the recording medium P that is separated from the conveying belt 12 and floats. Accordingly, the rear light receiving unit 53 does not detect the emitted light R2 from the first light emitting unit 51. On the other hand, emitted light R1 from the first light emitting unit 51 is detected by the front light receiving unit 52 at this time.

On the other hand, when the peeling position CB is deviated downstream from the reference peeling range NA, the output light R2 from the first light emitting portion 51 to the rear light receiving portion 53 is blocked by the recording medium P as shown in FIG. Therefore, the front light receiving unit 52 and the rear light receiving unit 53 change to a state in which the emitted lights R1 and R2 are detected, respectively.

On the other hand, when the peeling position CF is biased upstream from the reference peeling range NA, as shown in FIG. 5B, the recording is performed in which the emitted light R1 from the first light emitting unit 51 to the front light receiving unit 52 is lifted from the conveyance surface. The medium P is obstructed at a position D on the recording medium P. Accordingly, the front light receiving unit 52 does not detect the emitted light R1 from the first light emitting unit 51. On the other hand, the outgoing light R <b> 2 from the first light emitting unit 51 is detected by the rear light receiving unit 53.

As described above, according to the change in the incident state of the emitted light to the front light receiving unit 52 and the rear light receiving unit 53, it is possible to determine whether the peeling position is inside, upstream or downstream of the reference peeling range NA. Become. When it is detected that the peeling position is biased upstream from the reference peeling range NA, the rotational speed of the peeling roller 61 by the peeling motor 62 is temporarily reduced to reduce the tension applied to the recording medium P, and the peeling is performed. The position CF is moved downstream. On the other hand, when it is detected that the peeling position is deviated downstream from the reference peeling range NA, the rotational speed of the peeling roller 61 by the peeling motor 62 is temporarily increased to increase the tension applied to the recording medium P. The separation position CB is moved upstream. After it is confirmed that the peeling position has returned to the reference peeling range NA, a control operation for appropriately returning the rotation speed of the peeling roller 61 is performed.

Further, when the separation of the recording medium P is too early and the separation position CC has moved further upstream than the detection range by the front light receiving unit 52, as shown in FIG. Abnormality is detected when the outgoing light R3 to 57 is blocked by the position D. In this case, in order to prevent contamination of the recording medium P due to contact with the reading unit 30 and the image recording unit 20 and scattering and adhesion of ink ejected from the image recording unit 20, the conveyance operation and image recording by the conveyance unit 10 are performed. The image recording operation by the unit 20 is promptly stopped. As the cause of such an abnormality, for example, an abnormality related to adhesion such as an adhesive applied on the conveyance belt 12 or dust or dust attached on the conveyance belt 12, an abnormal placement of the recording medium P, a peeling motor 62, etc. An abnormal operation is assumed.

FIG. 6 is a flowchart showing a control procedure by the control unit 40 of the peeling control process executed in the inkjet recording apparatus 1 of the present embodiment.
This peeling control process is called and started with the start of the transport operation (rotation operation of the transport motor 14) of the transport unit 10, and is continued while the transport operation (rotation operation) is continued.

When the peeling control process is started, the control unit 40 (CPU 41) causes the first light emitting unit 51 and the second light emitting unit 56 to start a light emitting operation (step S101). The control unit 40 acquires incident light detection information from each of the front light receiving unit 52, the rear light receiving unit 53, and the upstream abnormality detection light receiving unit 57 (step S102).

The control unit 40 determines whether or not the upstream abnormality detection light receiving unit 57 has detected an amount of light that exceeds the reference (step S103). If it is determined that the detection has not been detected (“YES” in step S103), the control unit 40 causes the display unit 81 to perform a predetermined notification operation indicating that a separation abnormality has been detected, and the conveyance is performed. The conveyance operation by the unit 10, the peeling operation by the peeling operation unit 60, and the image recording operation by the image recording unit 20 are stopped (step S113). And the control part 40 complete | finishes a peeling control process.

When it is determined by the upstream abnormality detection light receiving unit 57 that the light amount equal to or greater than the reference value is detected (“NO” in step S103), the control unit 40 detects the light amount greater than the reference by the front light receiving unit 52, and It is determined whether or not the rear light receiving unit 53 detects a light amount that exceeds the reference (step S104). When it is determined that the front light receiving unit 52 detects a light amount that exceeds the reference and the rear light receiving unit 53 does not detect the light amount that exceeds the reference (“YES” in step S104), the control unit 40 determines that the peeling motor 62 is rotated at a normal speed (step S114). When the rotation operation has already been performed at the normal speed, the control unit 40 may continue the control operation as it is. Then, the process of the control unit 40 returns to step S102.

When it is determined that the light amount exceeding the reference is not detected by the front light receiving unit 52 or the light amount exceeding the reference is detected by the rear light receiving unit 53 (“NO” in step S104), the control unit 40 performs the front light reception. It is determined whether or not the light amount exceeding the reference is detected by the unit 52 and the light amount exceeding the reference is detected by the rear light receiving unit 53 (step S105). When it is determined that the front light receiving unit 52 does not detect the light amount above the reference and the rear light receiving unit 53 detects the light amount above the reference (“YES” in step S105), the control unit 40 determines that the peeling motor 62 is rotated at a predetermined low speed slower than the normal speed (step S115). When the rotational operation is already performed at a low speed, the control unit 40 may continue the control operation as it is. Then, the process of the control unit 40 returns to step S102.

When it is determined that the front light receiving unit 52 has detected a light amount above the reference or the rear light receiving unit 53 has not detected a light amount above the reference ("NO" in step S105), the control unit 40 It is determined whether or not the light amount exceeding the reference is detected by the light receiving unit 52 and the light amount exceeding the reference is detected by the rear light receiving unit 53 (step S106). When it is determined that the front light receiving unit 52 detects a light amount exceeding the reference and the rear light receiving unit 53 detects a light amount exceeding the reference (“YES” in step S106), the control unit 40 causes the peeling motor 62 to Is rotated at a predetermined high speed faster than the normal speed (step S116). When the rotation operation has already been performed at a high speed, the control unit 40 may continue the control operation as it is. Then, the process of the control unit 40 returns to step S102.

When it is determined that the front light receiving unit 52 does not detect the amount of light above the reference, or the rear light receiving unit 53 detects that the amount of light above the reference is not detected (that is, when the amount of light above the reference is not detected from any of them) ) (“NO” in step S106), since a detection abnormality has occurred, the control unit 40 causes the display unit 81 to perform a predetermined notification operation indicating the detection abnormality, and stops all operations related to image recording. (Step S107). And the control part 40 complete | finishes a peeling control process.

As described above, the inkjet recording apparatus 1 according to the present embodiment includes the transport unit 10 that transports the recording medium P by adhering it to the transport surface, and the image recording unit that records an image on the recording medium P that adheres to the transport surface. 20 and a reading unit that reads the surface of the recording medium P downstream in the conveyance direction of the recording medium P by the conveyance unit 10 with respect to the image recording operation range of the image recording unit 20 in the conveyance path of the recording medium P by the conveyance unit 10. 30, a peeling operation unit 60 that peels the recording medium P adhered to the conveyance surface by peeling it from the conveyance surface, and the separation state of the recording medium P from the conveyance surface in the conveyance direction more than the reading operation range by the reading unit 30. And a medium detection unit 50 that detects the downstream side of the medium.
Accordingly, in the inkjet recording apparatus 1 having the transport unit 10 that adheres the recording medium P to the transport surface, it is not necessary to define a large peelable range downstream from the reading unit 30 in consideration of variation in the peel position, and the size is large. The image reading by the reading unit 30 and the subsequent peeling of the recording medium P can be appropriately performed without conversion. Accordingly, it is possible to appropriately exclude defective images and perform maintenance of the ink jet head. Further, by appropriately detecting the peeling state of the recording medium P on the downstream side of the reading operation range by the medium detecting unit 50, it is possible to prevent the peeling position of the recording medium P from adversely affecting the reading operation.

Further, the medium detection unit 50 includes a first light emitting unit 51, a front light receiving unit 52 and a rear light receiving unit 53 that detect light emitted from the first light emitting unit 51, and a conveyance surface that accompanies the separation of the recording medium P. The peeling state is detected by changing the incident state of the emitted light from the first light emitting unit 51 to the front light receiving unit 52 and the rear light receiving unit 53 according to the presence or absence of lifting from the light source.
In this way, by detecting the presence or absence of peeling of the recording medium using the transmission type optical sensor, the reading position of the recording medium can be easily and surely maintained, and the peeling position is not greatly deviated from the reading operation range. Can do.

Further, the path of the emitted light from the first light emitting unit 51 is defined in a direction oblique to the transport direction and the width direction (here, further in a plane parallel to the transport surface). As a result, when the peeling position extends along the width direction, it becomes possible to detect within the predetermined width instead of one point in the transport direction. Whether or not the peeling position is in an appropriate range can be classified easily and reliably. Thereby, it is possible to perform the reading operation reliably while responding more flexibly and appropriately to some deviation of the peeling position.

Further, the medium detection unit 50 has two light receiving units, a front light receiving unit 52 and a rear light receiving unit 53, and the two light receiving units are combined with detection results of light emitted from the first light emitting unit 51 by each. Accordingly, the separation position of the recording medium P is arranged so as to be able to determine whether it is inside, upstream or downstream of the reference separation range NA in the transport direction. Thereby, when the peeling position is deviated from the reference peeling range NA, it is easy to take an appropriate action easily, and thus it is easy to perform the reading operation more stably with easy control.

Further, the first light emitting unit 51 detects the emitted light on the upstream side with respect to the conveyance direction from the emission position of the emitted light, and the rear side detects the emitted light on the downstream side in the conveyance direction with respect to the emission position. Outgoing light is emitted to each of the two light receiving parts, the light receiving part 53. Thereby, sufficient information on the peeling position can be obtained while the first light emitting unit 51 is made compact, and the reading operation can be easily performed stably.

Also, a control unit 40 is provided for controlling the operation of the peeling operation unit 60 so that the peeling position is within the reference peeling range NA based on the detection result of the medium detection unit 50. By performing such control, it is possible to stably correct the peeling position without stopping the transport operation, the image recording operation, and the reading operation when the peeling position slightly deviates from the reference peeling range NA. In the ink jet recording apparatus 1, it is possible to reduce the time and effort for the user to deal with, and to easily continue the image recording operation for a long period of time.

Further, the peeling operation unit 60 pulls the recording medium P away from the conveyance surface at a speed synchronized with the conveyance speed of the recording medium P by the conveyance unit 10, and the control unit 40 determines the separation position and the reference separation range NA. The pulling speed is changed based on the positional relationship.
With such a configuration, the peeling operation unit 60 can easily and stably maintain the peeling position without largely shifting, and even if there is a slight shift in the peeling position, the peeling position is slightly corrected little by little. Therefore, the image recording operation can be continuously continued without adversely affecting the image recording operation and the reading operation.

In addition, the inkjet recording apparatus 1 includes a second light emitting unit 56 and an upstream abnormality detection light receiving unit 57 that detect a separation abnormality of the recording medium P upstream of the reference separation range NA and downstream of the reading operation range in the transport direction. Prepare. Thereby, in the ink jet recording apparatus 1, the image recording unit 20 and the reading are dealt with by slight correction while continuing the image recording operation, the reading operation, and the conveying operation as described above with respect to a slight shift of the peeling position. It is possible to detect a case where a large separation position shift that may adversely affect the portion 30 and the like is detected and to respond immediately.

The conveyance surface of the recording medium P is one surface (outer circumferential surface) that is an endless member that circulates along a predetermined circulation path, and the reading operation range and the reference peeling range NA in the conveyance direction. An anti-vibration roller 19 that suppresses the vibration of the conveyor belt 12 is provided between the position and the most downstream position.
Thereby, in the ink jet recording apparatus 1, it is possible to reduce the transmission of fine vibrations that easily occur according to the peeling operation of the recording medium P performed against the adhesive force along the conveying belt 12, An adverse effect on the image recording operation by the image recording unit 20 can be prevented or reduced.

Further, the anti-vibration roller 19 is provided in contact with the surface opposite to the outer peripheral surface (conveying surface) of the conveying belt 12 and rotates according to the circular movement of the conveying belt 12. Therefore, the inkjet recording apparatus 1 can effectively reduce the vibration of the conveyor belt 12 without disturbing the circulation operation of the conveyor belt 12 with an easy configuration.

[Second Embodiment]
Next, an ink jet recording apparatus according to a second embodiment of the present invention will be described.
FIG. 7 is a perspective view showing the overall configuration of the inkjet recording apparatus 1a of the present embodiment.

In the ink jet recording apparatus 1a, the medium detection unit 50 is provided with two independent

light emitting units

511 and 512 corresponding to the front light receiving unit 52 and the rear light receiving unit 53, respectively. A third light emitting unit 58 and a downstream abnormality detection light receiving unit 59 are provided further downstream in the transport direction than the rear light receiving unit 53.
Further, the anti-vibration roller 19 supports the inner surface side of the conveyance belt 12 on the side opposite to the reading range by the reading unit 30.
Other configurations and their arrangements are the same as those of the ink jet recording apparatus 1 of the first embodiment, and the same reference numerals are used for the same configurations and the description thereof is omitted.

In the inkjet recording apparatus 1a of the present embodiment, the light emitting unit and the light receiving unit are paired one by one and provided at the same position in the transport direction. In this case, assuming that the peeling position of the recording medium P is uniform in the transport direction, the light emitted from the light emitting part is only received at the timing when the peeling position moves back and forth and crosses between the light emitting part and the light receiving part. Is prevented from entering.

The third light emitting unit 58 and the downstream abnormality detection light receiving unit 59 are disposed downstream of the first light emitting unit 51, the front light receiving unit 52, and the rear light receiving unit 53 in the transport direction, and the separation position of the recording medium P is normal. A second peeling abnormality detection unit that detects a state of peeling abnormality (here, a state where peeling is too slow) when moving to an abnormal peeling position on the downstream side of the normal peeling range (reference peeling range NA).

FIG. 8 is a flowchart showing a control procedure by the control unit 40 of the peeling control process executed in the ink jet recording apparatus 1a of the present embodiment.

When the peeling control process is started, the control unit 40 starts the light emitting operations of the

light emitting units

511 and 512, the second light emitting unit 56, and the third light emitting unit 58 (step S121). The control unit 40 acquires light detection information from the front light receiving unit 52, the rear light receiving unit 53, the upstream abnormality detection light receiving unit 57, and the downstream abnormality detection light receiving unit 59 (step S122).

The control unit 40 determines whether or not a decrease in the amount of light exceeding the reference is detected in any of the upstream abnormality detection light receiving unit 57 and the downstream abnormality detection light receiving unit 59 (step S123). If it is determined that it has been detected ("YES" in step S123), the control unit 40 notifies the display unit 81 that a peeling abnormality has been detected, and the conveying operation of the conveying unit 10 and the peeling of the peeling operation unit 60 are performed. The operation and the image recording operation by the image recording unit 20 are stopped (step S133). And the control part 40 complete | finishes a peeling control process.

When it is determined that neither the upstream abnormality detection light-receiving unit 57 nor the downstream abnormality detection light-receiving unit 59 has detected a light amount decrease that exceeds the reference ("NO" in step S123), the control unit 40 receives the front light reception. It is determined whether or not the unit 52 has detected a decrease in the amount of light exceeding the reference (step S124). If it is determined that it has been detected ("YES" in step S124), the control unit 40 determines whether or not the peeling motor 62 is currently operating at a low speed (step S134). When it is determined that the low speed operation is not being performed (“NO” in step S134), the control unit 40 changes the peeling motor 62 to the low speed operation described above (step S144). Then, the process of the control unit 40 returns to step S102. When it is determined that the low speed operation is being performed (“YES” in step S134), the control unit 40 changes the peeling motor 62 to the operation at the normal speed (step S136). Then, the process of the control unit 40 returns to step S102.

When it is determined in the determination process in step S124 that the front light receiving unit 52 has not detected a decrease in light quantity that exceeds the reference ("NO" in step S124), the control unit 40 uses the rear light receiving unit 53 to exceed the reference. It is determined whether or not a decrease in the amount of light has been detected (step S125). If it is determined that a decrease in light amount has been detected (“YES” in step S125), the control unit 40 determines whether or not the peeling motor 62 is currently operating at a high speed (step S135). When it is determined that the high speed operation is not being performed (“NO” in step S135), the control unit 40 changes the peeling motor 62 to the high speed operation (step S145). Then, the process of the control unit 40 returns to step S102. If it is determined that the high speed operation is being performed (“YES” in step S135), the processing of the control unit 40 proceeds to step S136, and the control unit 40 changes the peeling motor 62 to the normal speed operation. (Step S136).

If it is determined in the determination process in step S125 that the rear light receiving unit 53 has not detected a decrease in light quantity that exceeds the reference ("NO" in step S125), the process of the control unit 40 returns to step S102.

As described above, the ink jet recording apparatus 1a of the second embodiment includes the third light emitting unit 58 and the downstream abnormality detecting light receiving unit 59 that detect the separation abnormality of the recording medium P on the downstream side of the reference separation range NA in the transport direction. Prepare. Thereby, not only an abnormality that is prematurely peeled off but also an abnormality that is not properly peeled off can be detected, so that it is possible to prevent troubles such that the recording medium P after image recording is caught downward as the conveyor belt 12 rotates. it can.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the first embodiment, in addition to the normal peeling detection, there is a configuration for detecting an abnormality upstream of the reference peeling range NA in the transport direction. In the second embodiment, in addition to the upstream side, the downstream side In the above description, the configuration for detecting an abnormality is described. However, the configuration for detecting an abnormality may be provided only on the downstream side, or none may be provided.

In the inkjet recording apparatus 1 of the first embodiment, the emitted light is emitted from the same emission position of the first light emitting unit 51 to the front light receiving unit 52 and the rear light receiving unit 53. The emission position may be on the downstream side of the emission position to the rear light receiving unit 53. In this case, for example, it can be determined that the range in which the outgoing light is not detected by both the front light receiving unit 52 and the rear light receiving unit 53 is the optimum peeling position. Further, by arranging in this way, when both are not detected, when only one is detected, it is divided into four patterns when both are detected, so that finer control can be performed. Or the range which detects all can be made into the range of an abnormal peeling state, and the structure which concerns on abnormality detection can also be provided separately.

In the inkjet recording apparatus 1a of the second embodiment, the light emitted from the light emitting unit 511 to the front light receiving unit 52 and the light emitted from the light emitting unit 512 to the rear light receiving unit 53 are both perpendicular to the transport direction. Further, at least one of them may be oblique with respect to the transport direction as long as it does not overlap in the transport direction. Moreover, when both emitted light is diagonal with respect to a conveyance direction, they may be mutually parallel and may not be parallel.

In the above embodiment, the reference peeling range NA is determined between the light emitting position of the first light emitting unit 51 and the light receiving position of the rear light receiving unit 53 in the transport direction. It may be between the light receiving position of the light receiving unit 52. The setting of the above embodiment and which one of these settings is selected depends on a necessary distance between the reference peeling range NA and the reading operation range, for example, a conveyance belt generated when the recording medium P is peeled at the peeling position. It may be determined according to the degree of attenuation until 12 vibrations are transmitted to the reading operation range. Further, the inclination angle with respect to the transport direction of the outgoing light to the front light receiving unit 52 and the tilt angle with respect to the transport direction of the outgoing light to the rear light receiving unit 53 may be different.

In the above embodiment, the separation within the reference separation range NA, the upstream side or the downstream side thereof can be distinguished by the combination of the presence or absence of detection of the emitted light by the two light receiving units, but is not limited thereto. For example, when the peeling position can be detected only at the upstream end of the reference peeling range NA or only within the reference peeling range NA, and the peeling position is in contact with the upstream end, a predetermined It is also possible to repeat the control in which the rotational operation of the time peeling motor 62 is made slightly slower than the rotational operation of the transport motor 14 and then made slightly faster than the rotational operation of the transport motor 14.

Furthermore, a plurality of detection units may be provided so that the peeling position can be quantitatively evaluated, and the control unit 40 may control the operation of the peeling motor 62 more finely. In the above-described embodiment, the peeling motor 62 is rotated at a three-stage speed. However, when the speed is switched, the speed may be changed continuously or stepwise.

In the above embodiment, the control unit 40 performs direct control according to the presence / absence of detection of the emitted light by the front light receiving unit 52 and the rear light receiving unit 53, but peeling is performed via a PLC (Programmable Logic Controller) or the like. A signal may be output from the motor 62.

In the above embodiment, the anti-vibration roller 19 is provided, but it may not be provided. Moreover, the structure by which the conveyance belt 12 is supported by plate-shaped members, such as a platen, instead of the anti-vibration roller 19 may be sufficient, and the some roller may be arrange | positioned at an appropriate space | interval.

In the above embodiment, an inkjet recording apparatus that records a normal image with color ink has been described. However, an apparatus that performs processing such as coating or glossing with colorless ink is also included in the image recording apparatus of the present invention.

In the above embodiment, the ink jet recording apparatus has been described as an example. However, the present invention is also applied to a case where an image sensor used for inspection of an LED element is provided in another image recording apparatus, for example, an LED printer. Can be applied.
In addition, specific details such as the configuration, arrangement, control contents, and control procedure described in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

The present invention can be used for an image recording apparatus.

DESCRIPTION OF SYMBOLS 1, 1a Inkjet recording device 10 Conveying part 11 Driving roller 12 Conveying belt 13 Driven roller 14 Conveying motor 15 Encoder 16 Pressing roller 19 Anti-vibration roller 20

Image recording part

21, 21C, 21M, 21Y, 21K Head unit 211 Discharge head 22 Head Driving unit 30 Reading unit 31 Imaging sensor 40 Control unit 41 CPU
42 ROM
43 RAM
45 storage unit 50 medium detection unit 51 first

light emitting unit

511, 512 light emitting unit 52 front light receiving unit 53 rear light receiving unit 56 second light emitting unit 57 upstream abnormality detection light receiving unit 58 third light emitting unit 59 downstream abnormality detection light receiving unit 60 peeling operation Unit 61 Peeling roller 62 Peeling motor 70 Communication unit 80 Operation display unit 81 Display unit 82 Operation receiving unit 90 Bus NA Reference peeling range P Recording medium

Claims

A transport unit that transports the recording medium by adhering it to the transport surface;
A recording unit for recording an image on a recording medium adhered to the conveyance surface;
A reading unit that reads the surface of the recording medium on the downstream side in the conveyance direction of the recording medium by the conveyance unit from the recording operation range of the image by the recording unit in the conveyance path of the recording medium by the conveyance unit;
A peeling operation unit for peeling the recording medium adhered to the transport surface by peeling the recording medium from the transport surface;
A detection unit that detects a peeling state of the recording medium from the conveyance surface on the downstream side in the conveyance direction with respect to a reading operation range by the reading unit;
An image recording apparatus comprising:
The detection unit includes a light emitting unit and a light receiving unit that detects light emitted from the light emitting unit,
The image recording apparatus according to claim 1, wherein the peeling state is detected by changing an incident state of the emitted light on the light receiving unit according to presence or absence of lifting from the conveyance surface due to peeling of the recording medium.
3. The image recording apparatus according to claim 2, wherein the path of the emitted light is determined in a direction oblique to the width direction perpendicular to the transport direction in a plane parallel to the transport direction and the transport surface.
The detection unit has two light receiving units, and the two light receiving units have a recording medium peeling position within a predetermined peeling range in the transport direction in accordance with a combination of detection results of the emitted light by each. The image recording apparatus according to claim 2, wherein the image recording apparatus is arranged so as to be able to discriminate between the upstream side and the downstream side.
The light emitting unit detects the emitted light on the upstream side with respect to the carrying direction from the emission position of the emitted light, and detects the emitted light on the downstream side in the carrying direction with respect to the emitting position. The image recording apparatus according to claim 4, wherein the emitted light is emitted to each of the two light receiving units with the downstream light receiving unit.
6. The image recording apparatus according to claim 4, further comprising a control unit that controls an operation of the peeling operation unit so that a peeling position is within the predetermined peeling range based on a detection result of the detection unit.
The peeling operation unit pulls the recording medium away from the transport surface at a speed synchronized with the transport speed of the recording medium by the transport unit,
The image recording apparatus according to claim 6, wherein the controller changes the pulling speed based on a positional relationship between a peeling position and the predetermined peeling range.
8. The apparatus according to claim 4, further comprising a first peeling abnormality detection unit that detects a peeling abnormality of the recording medium upstream of the predetermined peeling range and downstream of the reading operation range in the transport direction. The image recording apparatus described in 1.
The image recording apparatus according to any one of claims 4 to 8, further comprising a second peeling abnormality detection unit that detects a peeling abnormality of the recording medium downstream of the predetermined peeling range in the transport direction.
The transport surface is one surface of an endless member that circulates along a predetermined circulation path,
10. A vibration isolator for suppressing vibration of the endless member is provided between the reading operation range and the most downstream position in the predetermined peeling range in the transport direction. An image recording apparatus according to claim 1.
11. The image recording apparatus according to claim 10, wherein the vibration isolator has a roller that is provided in contact with a surface opposite to the one surface of the endless member and that rotates in accordance with the circular movement of the endless member.