JP2004333899A - Image recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image recording device for easily returning from a trouble by detecting a trouble-occurred position for accurate processing when jammings, or the like, occur in a recording material to be carried from a rotating drum via a guide section. <P>SOLUTION: The image recording device comprises the rotating drum 10 for winding recording paper around the outer periphery surface for recording images and for retention of the paper; a guide section 18 for guiding the recording paper, sent from the rotary drum in the direction of discharge; an accumulator section 30 for making the guide section move the recording paper sent from the rotating drum for accumulation; and a detection section 70 that is provided at the guide section for detecting the recording paper. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image recording apparatus for recording an image by winding and holding a sheet-shaped recording material around an outer peripheral surface of a rotary drum.
[0002]
[Prior art]
2. Description of the Related Art An image recording apparatus that records an image by irradiating a recording sheet with light by irradiating the recording sheet with the outer circumference of a drum and then exposing the recording sheet to light is known (see Patent Document 1 below). The exposed recording paper is peeled off from the drum and transported to the exit through a guide. The recording paper is once accumulated in the accumulating portion and then transported to the exit. In this case, when a trouble such as a jam of the recording paper occurs before the recording paper peeled from the drum is conveyed to the exit, the position of the recording paper cannot be determined, and an accurate processing instruction cannot be given. It took longer than necessary to recover from a jam or other trouble. In addition, since it has not been possible to give an instruction for an accurate processing of the recording paper on which a jam or the like has occurred, it takes time to recover from the trouble.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-14428
[Problems to be solved by the invention]
The present invention has been made in view of the above-described problems of the related art, and when a problem such as a jam occurs in a recording material conveyed from a rotating drum through a guide unit, the trouble occurrence position is detected and an appropriate process is performed to easily solve the problem. It is an object of the present invention to provide an image recording apparatus capable of returning.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an image recording apparatus according to the present invention includes a rotating drum for holding a sheet-shaped recording material wound around an outer peripheral surface thereof for image recording, and the recording material sent from the rotating drum. A guide unit for guiding the recording material sent from the rotary drum, an accumulator unit for accumulating the recording material by moving the guide unit, and a detection unit provided on the guide unit for detecting the recording material And the following.
[0006]
According to this image recording apparatus, when a trouble such as a jam occurs in the recording material conveyed from the rotating drum through the guide portion in the discharge direction, the trouble occurrence is performed based on the detection result of the recording material by the detection portion provided in the guide portion. Since the determination can be made, the instruction of the jam processing or the like can be made accurately based on the detection of the trouble position such as the jam, and the trouble can be easily recovered.
[0007]
Another image recording apparatus according to the present invention includes a rotating drum that winds and holds a sheet-like recording material around an outer peripheral surface thereof for image recording, a pulse motor that rotationally drives the rotating drum, and a rotating drum. A storage unit that stores the length of the wound recording material, a guide unit that guides the recording material sent from the rotary drum in a discharge direction, and the guide unit that stores the recording material sent from the rotary drum. An accumulator unit that accumulates by moving, and a detection unit provided in the guide unit for detecting the recording material, the length of the recording material sent from the rotary drum to the guide unit is determined by the pulse. The length of the recording material sent to the accumulator unit calculated based on the pulse signal for the motor or the operation time of the pulse motor Comparing the length of the recording material wound around the rotary drum stored in the storage means, and obtains the length of the recording material on the rotating drum.
[0008]
According to this image recording apparatus, when it is determined that a trouble has occurred based on the detection result of the recording material by the detection unit provided in the guide unit, the number of pulse signals applied to the pulse motor driving the rotary drum and the operation time of the pulse motor Calculates the length of the recording sheet sent to the guide section, and compares the calculated length of the recording sheet with the length of the recording material wound around the rotating drum stored in the storage means. Jam processing and the like can be accurately performed on a recording material in which a jam or the like has occurred based on the length of the recording material, and trouble can be easily recovered.
[0009]
The image recording apparatus includes a first storage section provided below the rotary drum and storing the unnecessary recording material, and a second storage section provided below the accumulator section and storing the unnecessary recording material. It is determined that a trouble has occurred when the discharged recording material cannot be detected by the detection unit, the conveyance of the recording material is stopped, and the length of the recording material on the rotating drum is determined. It is determined which of the first storage unit and the second storage unit should be used to store the recording material in which the trouble has occurred, and the storage position of the determined first or second storage unit is determined. The recording paper can be stored by rotating a rotary drum.
[0010]
According to the above-described configuration, the recording material can be efficiently stored in the first or second storage portion that is more appropriate according to the length of the recording material on the rotating drum. When storing the recording material in the second storage section below the accumulator section, the guide section moves and the accumulator section is opened to store the recording material.
[0011]
The rotating drum is preferably configured to be rotatable in the forward and reverse directions, and the rotating drum can be rotated in the forward or reverse direction to quickly move to the appropriate first or second storage unit. .
[0012]
Further, by configuring the recording material to be held by the rotary drum by suction and being released by stopping the suction, the recording material can be reliably transported to the storage position, and the suction is stopped at the storage position. This allows the first or second storage section to reliably store the data.
[0013]
In addition, it is preferable that the detection unit is formed of a transmission type optical sensor, and the detection can be reliably performed even when the positional freedom of the recording material is large.
[0014]
Further, it is preferable that a display unit is provided for displaying at least one of a state and a countermeasure for a trouble determined based on a detection result of the detection unit. Can be displayed on the display unit.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the external appearance of the entire image recording apparatus according to the present embodiment. FIG. 2 is a view of the inside of the image recording apparatus of FIG. 1 as viewed from the front side. FIG. 3 is a main part plan view of the drum and the optical unit of the image recording apparatus of FIG. 2 as viewed from above.
[0016]
As shown in FIG. 1, the image recording apparatus 1 includes an exposure unit 11 for exposing a recording material to form an image and a developing unit 21 for developing the exposed recording material. The exposure unit 11 includes a front panel 5 that can be opened and closed so that maintenance can be performed from the front, a display unit 2 that includes various information displays and a touch panel and can be input for operation of the entire apparatus, and a roll-shaped recording material inside. Loading units 12, 12 'capable of loading a cartridge 13 containing certain recording paper after opening the paper feed covers 3, 4; FIG. 1 shows a state before and after the cartridge 13 is loaded into the loading units 12 and 12 ′.
[0017]
The developing unit 21 includes an upper panel 6 that can be opened and closed for maintenance, and a supply panel 7 that can be opened and closed for replenishing a developing solution and the like on the front surface.
[0018]
As shown in FIG. 2, the image recording apparatus 1 according to the present embodiment includes an exposure unit 11 for exposing a recording material to form an image, and a developing unit 21 for developing the exposed recording material. The exposure unit 11 is loaded in the loading units 12 and 12 ′, and loaded in the loading units 12 and 12 ′, in which a dedicated cartridge 13 containing a recording paper as a sheet-shaped recording material wound in a roll shape is loaded and stored. A feeding unit 14 including a pair of conveying rollers 40, 41, 42 and the like for feeding recording paper from the cartridge 13, and the recording paper S fed from the feeding unit 14 is mainly sucked and held on the outer peripheral surface by vacuum suction. A drum 10 that rotates in a rotation direction R for scanning, an optical unit 16 that exposes a recording paper on the drum 10 to a light beam such as an LED light or a laser light, and a sub-scan for optical scanning for sub-scanning A sub-scanning unit 17 that transports the recording paper on the drum 10 after image recording is provided. The exposed recording paper is conveyed to the developing unit 21 through the outlet 19 and the connecting portion 19a.
[0019]
The image recording apparatus 1 of FIG. 2 further includes a driven roller 31 that is disposed downstream of the pair of conveying rollers 42 and that is driven and rotated in accordance with the conveyance of the recording sheet sent toward the drum 10, and the recording sheet between the drum 10 and the driven roller 31. A driven roller 31 to be conveyed, an accumulation guide member 18 for guiding the recording paper when the recording paper separated from the drum 10 by the separation member 15 is conveyed by the drum 10 and the driven roller 31, and a conveyance by the accumulation guide member 18. A transport roller pair 32 that further transports the recording paper that has been fed to the outlet 19, an accumulation unit 30 that accumulates the recording paper that has reached the transport roller pair 32, and is disposed near the downstream side of the transport roller pair 32. And a detection sensor 33 for detecting the leading end of the recording paper.
[0020]
A relatively narrow driven roller 43 disposed in the vicinity of the downstream side of the conveying roller pair 42 is driven to rotate with the movement of the recording paper, and a rotary encoder 58 (FIG. 5) is connected coaxially with the driven roller 43. I have. When the rotary encoder 58 rotates together with the driven roller 43 and measures the amount of rotation, the length of the photosensitive paper wound around the rotary drum 10 after passing through the pair of transport rollers 42 can be obtained. Further, the pair of transport rollers 32 on the downstream side has a one-way clutch structure, and can freely rotate in the direction in which the recording paper is sent to the downstream side.
[0021]
Cut sections 10a for cutting the recording paper are arranged in the vicinity of the downstream side of the conveying roller pairs 40 and 41 in FIG. 2, and each cut section 10a has a rotary cutter that is rotationally driven by a motor 59 (FIG. 5). Then, the recording sheet is cut into a predetermined length based on the above-described recording sheet length measurement.
[0022]
As shown in FIG. 2, a first storage section 61 is disposed below the accumulation section 30 at the bottom of the exposure unit 11, and a second storage section 62 is disposed below the rotating drum 10. The storage portions 61 and 62 are partitioned by a reinforcing member 63. The first and second storage sections 61 and 62 can store unnecessary recording paper having a jam or the like.
[0023]
The developing unit 21 of FIG. 2 performs wet development on the exposed recording paper sent from the exposure unit 11, and includes a developing unit 23 for developing the recording paper, a fixing unit 24 for performing the fixing process, and a stable unit. The image forming apparatus includes a stabilizing unit 25 that performs a process, a drying unit 26 that performs a drying process, and a discharge unit 27 that discharges the dried recording paper to the outside by a pair of conveying rollers 27a.
[0024]
As shown in FIG. 3, the drum 10 of the image recording apparatus 1 is configured such that the rotating shaft 14a of the rotating shaft portion 14 'and the rotating shaft 15a of the rotating shaft portion 18 can be rotated on the support bases 34a and 34b via bearings 33a and 33b. It is pivoted. A drive pulley 35a is provided on one rotating shaft 15a of the drum 10, and the drive pulley 35a is connected to an output pulley 35b of a drum drive pulse motor M6 by a belt 36, and the drum is driven by the drum drive pulse motor M6. 10 rotates. A rotary encoder 37 is provided on the rotation shaft 15a of the drum 10, and outputs a pulse signal for rotation to use for pixel clock control synchronized with the rotation of the drum.
[0025]
The other rotating shaft 14a of the drum 10 is connected to the suction blower P1. A large number of suction holes 31c are formed in the surface of the drum 10 so as to extend linearly in the direction of the rotation axis, and the inside of the drum 10 is depressurized by driving the suction blower P1, so that the recording paper is suctioned to the surface of the drum 10. .
[0026]
The optical unit 16 is configured to be movable in parallel with the drum axis by the sub-scanning unit 17 and receives a digital image signal to expose a recording sheet attracted to the drum 10 with a light beam to write an image. As shown in FIG. 4, in the optical unit 16, an LED unit 320, an LED unit 321, and an LED unit 322 are arranged as light sources of three wavelengths, for example, light sources for B, G, and R. The light beams from the LED units 320, 321 and 322 expose images on the recording paper on the drum 10 from the condenser lens 331 via mirrors 325, 326 and 327. The exposure shutter 332 is opened and closed by an exposure solenoid 333 to open and close an optical path at the start / end of exposure.
[0027]
The optical unit 16 is fixed to the moving belt 340, and is provided to be movable in a direction parallel to the drum axis while being guided by the pair of guide rails 341 and 342. The moving belt 340 is stretched over a pair of pulleys 343 and 344, and one pulley 344 is connected to the output shaft 345 of the sub-scanning motor M7, and the optical unit 16 moves in parallel with the drum axis by driving the sub-scanning motor M7. .
[0028]
As shown in FIG. 3, the suction blower P1 sucks the inside of the drum 10 through the suction connection pipe 51 by the air suction pump, and makes the inside of the drum 10 a negative pressure before the exposure by the exposure unit 11 starts, thereby adsorbing the recording paper to the outer peripheral surface. . When the recording paper is wound around the drum 10 and transported, the suction blower P1 is operated to suck the recording paper, and the suction blower P1 is stopped to release the recording paper having a jam or the like from the drum 10 and drop it. It is stored in the storage units 61 and 62.
[0029]
Next, the accumulating portion of the image recording apparatus 1 of FIG. 2 and the transport rollers near the accumulating portion will be described with reference to FIG. FIG. 4 is a front view of a main part showing the accumulation member and its vicinity of the image recording apparatus of FIG.
[0030]
As shown in FIG. 4, the upstream transport roller is composed of a drum 10 and a driven roller 31, and the drum 10 is rotationally driven in a forward direction R and a reverse direction R 'by a drum driving pulse motor 51 (FIG. 5). The driven roller 31 is driven to rotate by the rotation of the drum 10. The accumulation guide member 18 disposed on the downstream side of the upstream conveyance roller is inclined toward the upper conveyance roller pair 32 on the upper side, and the fixed guide plate 18a and the rotation guide are provided as shown by the solid line in FIG. A guide passage 18d is formed with the plate 18b.
[0031]
The rotation guide plate 18b is supported by the rotation support member 35 at the position indicated by the solid line in FIG. That is, the rotation support member 35 is rotated in the rotation direction a by the driving motor 53 (FIG. 5) about the rotation shaft 35a from the broken line position to the solid line position in FIG. The accumulator 18 is turned around the turning shaft 18e in the turning direction b to the position indicated by the solid line in the drawing, and the accumulation guide member 18 is closed to form the guide passage 18d. The recording paper can be conveyed while being guided by the formed guide passage 18d.
[0032]
Further, when the rotation support member 35 is rotated from the solid line position in FIG. 4 to the broken line position in the direction a ′ opposite to the rotation direction a, the rotation guide plate 18b is moved in the direction b ′ opposite to the rotation direction b. 4, the accumulation guide member 18 is opened, and the accumulation rate section 30 having a space in which the recording paper can be accumulated is formed.
[0033]
As shown in FIG. 4, the peeling member 15 is rotated by the driving motor 49 (FIG. 5) about the rotation shaft 15a, and the claw portion 15b approaches the outer peripheral surface of the drum 10. The transport path 36 is formed by the end 18c of the rotation guide plate 18b, and the recording paper transported from between the drum 10 and the driven roller 31 is separated from the drum 10 by the claw 15b. It is conveyed to the guide passage 18d of the accumulation guide member 18. The recording paper sent from the guide passage 18d is further conveyed by a downstream conveying roller pair 32 driven by a driving motor 52.
[0034]
As shown in FIG. 4, a guide member 54 for guiding the recording paper conveyed by the pair of conveying rollers 32 to the outlet 19 is provided near the downstream side of the pair of conveying rollers 32 on the downstream side. And a shutter plate 55 disposed between the shutter plate 55 and the shutter plate 19. When the detection sensor 33 detects the leading end of the recording paper S, the shutter plate 55 is lifted in the upward direction V in FIG. 4 by driving the arm 56 by the motor 57, thereby opening the downstream side of the guide member 54, and conversely. Close by working.
[0035]
In addition, a detection sensor 70 including a transmission type optical sensor is disposed on the accumulation guide member 18. The detection sensor 70 includes a light emitting element 71 arranged on the fixed guide plate 18a side and a light receiving element 72 arranged on the rotating guide plate 18b side, and detects a recording sheet passing through the guide passage 18d. Note that the light emitting element 71 and the light receiving element 72 may be arranged at opposite positions.
[0036]
FIG. 5 shows a block diagram of a control system of the image recording apparatus 1 of FIG. The control unit 50 of the image recording apparatus 1 shown in FIG. 5 includes a central processing unit (CPU) and the like, and detects the rotation amount of the driven roller 31 detected by a rotary encoder 58 coaxially connected to the driven roller 31 in FIG. The suction blower P1, the motor 59 of the cutting unit 10a, the pulse motor M for driving the drum 10, the motor 49 for driving the peeling member 15, and the driving motor 49 based on the detection result of the recording paper by the detection sensor 70 disposed on the accumulation guide member The drive motor 53 of the accumulation guide member 18 and the display unit 2 are controlled.
[0037]
The control unit 50 of FIG. 5 stores the length of the recording paper wound around the rotating drum 10 by measuring based on the rotation amount of the driven roller 31 detected by the rotary encoder 58, and detects the recording paper jam or the like by the detection sensor 70. When a trouble is detected, the length of the recording paper conveyed to the guide passage 18d of the accumulation guide member 18 is calculated from the number of pulse signals sent to the driving pulse motor M6 of the drum 10, and the length stored and the calculated length are calculated. The length of the recording paper on the rotary drum 10 is determined by comparing the length with the set length. Then, it is determined which of the first storage unit 61 and the second storage unit 62 is to be used to store unnecessary recording paper due to a jam or the like based on the obtained length of the recording paper. Further, the display unit 2 displays the position where the trouble has occurred, the content of the trouble, and the like.
[0038]
Next, an operation when a trouble such as a jam is detected by the detection sensor in the image recording apparatus 1 of FIGS. 1 to 5 will be described with reference to a flowchart of FIG.
[0039]
First, the recording paper from the loading section 12 or 12 'is transported by the transport roller pairs 40 to 42 and the like, and is transported to the rotary drum 10 through the driven roller 43 (S01). Then, the length of the recording paper is determined by the rotary encoder 58 connected to the driven roller 43, and the recording paper is cut into a predetermined length by the cut section 10a. The recording paper having the predetermined length is wound around the rotary drum 10. The control unit 50 stores the length of the recording paper wound around the rotating drum 10 (S02).
[0040]
Next, the suction blower P1 in FIG. 3 is operated to make the inside of the rotary drum 10 a negative pressure, thereby sucking and holding the recording paper on the rotary drum 10 (S03). Then, an image is recorded by exposing a light beam from the optical unit 16 to the recording paper on the rotating rotating drum 10 (S04). Thereafter, the rotating drum 10 is rotated and the recording paper is removed by the peeling member 15 in FIG. It is peeled off from the rotating drum 10 and is conveyed to the guide path 18d of the accumulation guide member 18 through the conveyance path 36 (S05).
[0041]
When the detection sensor 70 provided on the accumulation guide member 18 cannot detect the recording paper sent to the guide passage 18d as described above even after a predetermined time has elapsed, the recording paper is moved between the rotating drum 10 and the guide passage 18d. It is determined that a trouble such as a jam has occurred between them (S06), and the rotation of the rotary drum 10 is stopped.
[0042]
Then, the trouble occurrence position and the contents of the trouble are displayed on the display unit 2 of the image recording apparatus 1 (S07), and the length of the recording paper fed from between the driven roller 31 and the drum 10 toward the guide passage 18d. Is calculated from the number of pulses transmitted to the drum driving pulse motor M6 (S08).
[0043]
Next, the length of the recording paper wound around the rotary drum 10 stored in step S02 is compared with the length of the recording paper sent toward the guide passage 18d calculated in step S08, and the length of the former is compared. The length of the recording paper on the rotating drum 10 is obtained by subtracting the latter length from the above (S09).
[0044]
Next, based on the length of the recording paper on the rotary drum 10 obtained as described above, the recording paper that has been jammed is stored in the first storage part 61 or is stored in the second storage part 62. It is determined (S10). For example, when the length of the recording paper on the rotating drum 10 is shorter than the predetermined length of the recording paper, it is determined that the recording paper is stored in the first storage part 61 because a large amount has been sent to the guide passage 18d side. When the length of the recording paper on the rotary drum 10 is longer than a predetermined length of the recording paper, it is determined that the recording paper is to be stored in the second storage part 62 because a large amount remains on the rotary drum 10 side. Done.
[0045]
As a result of the above determination, when it is determined that the storage unit 61 is to be stored in the first storage unit 61, the driving motor 53 of the accumulation guide member 18 is driven to rotate the rotation guide plate 18b in the rotation direction b 'in FIG. Thus, the accumulation section 30 is formed (S11). When the inside of the rotary drum 10 is being suctioned, the operation of the suction blower P1 is stopped (S12), the holding of the recording paper is stopped, and the recording paper S1 that has been jammed as shown by the broken line in FIG. It is stored in the lower first storage section 61 (S13).
[0046]
If it is determined that the recording paper is to be stored in the second storage part 61, the rotary drum 10 is rotated while the rotary drum 10 is internally sucked (S14), and the recording paper having the jam is removed from the rotary drum 10. When the air blows downward, the operation of the suction blower P1 is stopped (S15), the holding of the recording paper is stopped, and the recording paper S2 that has been jammed as shown by the broken line in FIG. It is stored (S16). In step S14, it is preferable that the rotary drum 10 be rotated in the forward direction R or the reverse direction R 'to quickly move to the appropriate storage position.
[0047]
As described above, it is determined whether to store the jammed recording paper in the first storage section 61 or the second storage section 62 based on the length of the recording paper on the rotating drum 10, The container can be automatically stored in the storage section 61 or 62 at an appropriate storage position by dropping due to its own weight.
[0048]
When the detection sensor 70 does not cause a trouble such as a jam in the step S06, the recording paper is further conveyed to the outlet 19 by the conveying roller pair 32 (S17), and is sent to the developing unit 21 from the connection portion 19a to be recorded. After the paper is developed (S18), the paper is discharged to the discharge unit 28 (S19).
[0049]
As described above, according to the image recording apparatuses of FIGS. 1 to 5, when it is determined that a trouble has occurred based on the detection result of the recording paper by the detection sensor 70 provided on the accumulation guide member 18, The length of the fed recording paper is calculated, and the calculated length of the recording paper is compared with the stored length of the recording material wound around the rotary drum 10 to determine the length of the recording material on the rotary drum. According to the length of the recording material on the rotating drum 10, the recording material can be efficiently stored in the first or second storage portion at a more appropriate storage position.
[0050]
Further, since the recording paper is held by the rotary drum 10 by suction and stopped by stopping the suction, the holding can be released. Therefore, the recording paper can be reliably transported to the storage position. 2 can be securely stored.
[0051]
As described above, when a jam or the like occurs on the recording paper, an accurate return process can be performed, and highly accurate information can be provided or instructed on the display unit 2. Therefore, the recovery time from the jam or the like is short and stable. An image recording device can be realized.
[0052]
As described above, the present invention has been described with the embodiments, but the present invention is not limited to these, and various modifications can be made within the technical idea of the present invention. For example, the length of the recording sheet sent to the accumulation guide member 18 when a jam or the like occurs may be calculated from the operation time of the pulse motor M6. Further, a plurality of recording paper detection sensors disposed on the accumulation guide member 18 may be provided in the transport direction.
[0053]
【The invention's effect】
According to the present invention, when a trouble such as a jam occurs in a recording material conveyed from a rotating drum through a guide unit, an image in which a trouble occurrence position is detected and an appropriate process is performed to easily recover from the trouble. A recording device can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating an appearance of an entire image recording apparatus according to an embodiment.
FIG. 2 is a view of the inside of the image recording apparatus of FIG. 1 as viewed from the front side.
FIG. 3 is a plan view of a main part of a drum and an optical unit of the image recording apparatus of FIG. 2 as viewed from above.
4 is a front view of a main part showing the accumulation member and its vicinity of the image recording apparatus of FIG. 2;
FIG. 5 is a block diagram of a control system of the image recording apparatus 1 of FIG.
FIG. 6 is a flowchart for explaining an operation when a trouble such as a jam is detected by a detection sensor in the image recording apparatus 1 of FIGS. 1 to 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Image recording device 2 ... Display part 10 ... Rotary drum 18 ... Accumulation guide member (guide part)
18a: Fixed guide plate 18b: Rotating guide plate 30: Accumulator unit 50: Control unit 61: First storage unit 62: Second storage unit 70: Detection Sensor M6: Rotary drum driving pulse motor P1: Suction blower S: Recording paper R: Forward direction of rotating drum rotation R ': Reverse direction of rotating drum rotation

Claims (6)

A rotating drum that winds and holds a sheet-like recording material around its outer peripheral surface for image recording,
A guide portion for guiding the recording material sent from the rotating drum in a discharge direction,
An accumulator section for accumulating the recording material sent from the rotating drum by moving the guide section;
An image recording apparatus, comprising: a detection unit provided on the guide unit for detecting the recording material. A rotating drum that winds and holds a sheet-like recording material around its outer peripheral surface for image recording,
A pulse motor for rotationally driving the rotating drum,
Storage means for storing the length of the recording material wound on the rotating drum,
A guide portion for guiding the recording material sent from the rotating drum in a discharge direction,
An accumulator section for accumulating the recording material sent from the rotating drum by moving the guide section;
A detection unit provided in the guide unit to detect the recording material,
The length of the recording material sent from the rotating drum to the guide portion is calculated based on a pulse signal for the pulse motor or an operation time of the pulse motor,
Comparing the calculated length of the recording material sent to the accumulator unit with the length of the recording material wound on the rotating drum stored in the storage unit to determine the length of the recording material on the rotating drum. An image recording apparatus characterized by the above-mentioned. A first storage unit that is provided below the rotating drum and stores the unnecessary recording material;
A second storage unit provided below the accumulator unit for storing the unnecessary recording material,
When the discharged recording material cannot be detected by the detection unit, it is determined that a trouble has occurred, the conveyance of the recording material is stopped, and the first recording material on the rotating drum is determined based on the obtained length of the recording material on the rotating drum. And determining whether to store the recording material in which the trouble has occurred in the storage section or the second storage section, and rotating the rotary drum to the storage position of the determined first or second storage section. The image recording apparatus according to claim 2, wherein the recording paper is accommodated in the recording apparatus. The image recording apparatus according to claim 1, wherein the recording material is held by the rotating drum by suction, and the holding is released by stopping the suction. The image recording apparatus according to claim 1, wherein the detection unit includes a transmission type optical sensor. The image recording apparatus according to any one of claims 1 to 5, further comprising: a display unit that displays at least one of a state of the trouble determined based on a detection result of the detection unit and a coping method thereof. .

Images