Sheet transport device and image recording device equipped with sheet transport device

Abstract

To suppress damage to a sheet-like medium, and to reduce an arrangement space of a medium detection part in a direction perpendicular to a conveyance path of the sheet-like medium.SOLUTION: A paper detection part includes: a rotary shaft 81 extending along a direction intersecting a conveyance direction of paper P; and an actuator 82 capable of rotating around the rotary shaft 81, having a contact part 82a capable of contacting the paper P to be conveyed, and movable between a first position partially located on a conveyance path of the paper P and a second position where the paper P is retracted from the conveyance path by contacting the contact part 82a. In a face orthogonal to an extending direction of the rotary shaft 81, an angle θ between a straight line S2 connecting the rotary shaft 81 and the contact part 82a when the actuator 82 is in a second position and a straight line S1 that is orthogonal to the conveyance direction and passes through the contact portion 82a and a friction coefficient μ between the actuator 82 and the paper P satisfy a relation Atan(μ)≤θ.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a sheet conveying apparatus provided with a medium detection unit capable of detecting a sheet-like medium, and an image recording apparatus provided with the sheet conveying apparatus.

Background Art

[0002] Patent Document 1 discloses a laser printer (image recording apparatus) provided with a detection sensor (medium detection unit) for detecting a sheet (sheet-like medium) conveyed by a conveyance roller (conveyance unit). The detection sensor includes a rotating member (actuator) that rotates about a rotation axis, and a detection unit (sensor) that detects the displacement of the rotating member. When there is no sheet at the detection position, a part of the rotating member is located on the sheet conveyance path. When a sheet is conveyed to the detection position by the conveyance roller, the rotating member rotates to a position where it retreats from the conveyance path by contacting the sheet.

[0003] The above-described detection sensor is configured to be movable so that the rotation axis moves away from the conveyance path when the sheet is sent in a direction opposite to the conveyance direction by the conveyance roller during jam processing or the like. As a result, it becomes difficult for the sheet to be strongly pressed by the rotating member, and damage to the sheet can be prevented.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above-described detection sensor, since the rotation axis is configured to be movable so as to move away from the conveyance path, the space required for arranging the detection sensor becomes large in the direction orthogonal to the conveyance path.

[0006] The object of the present invention is to provide a sheet transport device and an image recording device equipped with a sheet transport device that can suppress damage to sheet-like media and reduce the space required for the placement of a media detection unit in a direction perpendicular to the transport path of the sheet-like media. [Means for solving the problem]

[0007] The sheet conveying device of the present invention comprises a conveying unit capable of conveying a sheet-like medium, and a medium detection unit capable of detecting the sheet-like medium being conveyed by the conveying unit. The media detection unit includes a pivot shaft extending in a direction intersecting the transport direction of the sheet-like medium transported by the transport unit, an actuator that is rotatable about the pivot shaft and has a contact portion that can contact the sheet-like medium transported by the transport unit, and is movable between a first position where a portion is located on the transport path of the sheet-like medium transported by the transport unit and a second position where the sheet-like medium is retracted from the transport path when it comes into contact with the contact portion, a biasing member that biases the actuator in the direction from the second position toward the first position, and a sensor capable of detecting the movement of the actuator between the first position and the second position, wherein, in a plane perpendicular to the extending direction of the pivot shaft, the angle θ between a first straight line connecting the pivot shaft and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ)≦θ.

[0008] From another perspective, the sheet conveying device of the present invention comprises a conveying unit capable of conveying a sheet-like medium, and a medium detection unit capable of detecting the sheet-like medium conveyed by the conveying unit. The medium detection unit comprises a pivot axis extending in a direction intersecting the conveying direction of the sheet-like medium conveyed by the conveying unit, an actuator that is rotatable about the pivot axis and has a contact portion capable of contacting the sheet-like medium conveyed by the conveying unit, and is movable between a first position in which a portion is located on the conveying path of the sheet-like medium by the conveying unit, and a second position in which the contact portion is moved away from the conveying path, thereby the actuator being biased in the direction from the second position toward the first position, and a sensor capable of detecting the movement of the actuator between the first position and the second position, wherein the actuator receives a force from the sheet-like medium toward the second position whether it is in contact with the sheet-like medium moving in the conveying direction or in contact with the sheet-like medium moving in the opposite direction to the conveying direction.

[0009] The image recording device of the present invention comprises a transport unit capable of transporting a sheet-like medium, a medium detection unit capable of detecting the sheet-like medium transported by the transport unit, and a recording unit that records an image on the sheet-like medium transported by the transport unit. The media detection unit includes a pivot shaft extending in a direction intersecting the transport direction of the sheet-like medium transported by the transport unit, an actuator that is rotatable about the pivot shaft and has a contact portion that can contact the sheet-like medium transported by the transport unit, and is movable between a first position where a portion is located on the transport path of the sheet-like medium transported by the transport unit and a second position where the sheet-like medium is retracted from the transport path when it comes into contact with the contact portion, a biasing member that biases the actuator in the direction from the second position toward the first position, and a sensor capable of detecting the movement of the actuator between the first position and the second position, wherein, in a plane perpendicular to the extending direction of the pivot shaft, the angle θ between a first straight line connecting the pivot shaft and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ)≦θ. [Effects of the Invention]

[0010] According to the sheet transport device and image recording device of the present invention, the actuator of the media detection unit receives a force from the sheet-like medium in the direction from a first position to a second position, whether it is in contact with a sheet-like medium moving in the transport direction or in contact with a sheet-like medium moving in the opposite direction to the transport direction. Therefore, damage to the sheet-like medium can be suppressed. Furthermore, compared to the case where the pivot axis is configured to be away from the transport path, the space required for arranging the media detection unit in the direction perpendicular to the transport path of the sheet-like medium can be reduced. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic side view showing the internal structure of a printer according to one embodiment of the present invention. [Figure 2] This is a perspective view showing the paper detection unit. [Figure 3] This is a view of the second support section of the enclosure from an oblique angle above. [Figure 4] This diagram illustrates the movement of the actuator in the paper detection unit. (a) shows the case where there is no paper at the detection position, and (b) shows the case where there is paper at the detection position. [Figure 5] This diagram illustrates the movement of the detection member in the paper detection unit. (a) shows the case where there is no paper at the detection position, and (b) shows the case where there is paper at the detection position. [Figure 6] This diagram illustrates the direction of the force applied to the actuator of the paper detection unit. (a) shows the case where the paper moves in the transport direction, and (b) shows the case where the paper moves in the opposite direction to the transport direction. [Figure 7] This diagram shows the process of removing the feed tray from the enclosure. [Figure 8] (a) is a diagram showing the actuator in the third position, and (b) is a diagram showing the detection member when the actuator is in the third position. [Modes for carrying out the invention]

[0012] A printer 100 (corresponding to the "sheet transport device" and "image recording device" of the present invention) according to a preferred embodiment of the present invention will be described below with reference to Figure 1. The vertical, horizontal, and front-to-back directions shown in Figure 1 refer to the vertical, horizontal, and front-to-back directions of the printer 100.

[0013] (Overall configuration of printer 100) The printer 100 mainly comprises a housing 1, a paper feed tray 2, a transport unit 4, a cutter 5, a recording unit 6, a paper output tray 7, a paper detection unit 8, and a control unit 10.

[0014] On the front wall 11 of the housing 1, openings 11a and 11b are formed. The openings 11a and 11b are arranged vertically. The opening 11a is located below the opening 11b. The opening 11a serves as an entrance and exit for inserting and removing the feed tray 2 into and from the housing 1. The opening 11b serves as an entrance and exit for inserting and removing the paper discharge tray 7 into and from the housing 1.

[0015] The bottom wall 12 of the housing 1 has a first support portion 13 and a second support portion 14 that support the bottom of the feed tray 2 mounted on the housing 1. The first support portion 13 supports the rear end portion of the feed tray 2 mounted on the housing 1. The second support portion 14 supports the front end portion of the feed tray 2 mounted on the housing 1. The first support portion 13 and the second support portion 14 have a thickness in the vertical direction. The second support portion 14 corresponds to the "wall portion" of the present invention.

[0016] The feed tray 2 is detachably supported by the housing 1. The feed tray 2 can be inserted and removed along the front-rear direction with respect to the housing 1 through the opening 11a formed in the housing 1. The feed tray 2 is located below the recording unit 6 when mounted on the housing 1.

[0017] The feed tray 2 has a roll body accommodating portion 25 capable of accommodating the roll body R. Note that the feed tray 2 may be configured to be capable of accommodating cut paper in addition to the roll body R. The roll body R is one in which a long sheet P (corresponding to the "sheet-like medium" of the present invention) is wound in a roll shape around the outer peripheral surface of a cylindrical core member Rc. The roll body accommodating portion 25 accommodates the roll body R in a posture in which its axial direction coincides with the left-right direction.

[0018] The roll body housing portion 25 has two support bases 26, 27 and two rollers 26a, 27a. The two support bases 26, 27 are arranged at a distance from each other in the front-rear direction. The support base 26 is located behind the support base 27. The two support bases 26, 27 both extend along the left-right direction. The two rollers 26a, 27a are arranged at a distance from each other in the front-rear direction. The roller 26a is rotatably attached to the support base 26 around a rotation axis extending along the left-right direction. The roller 27a is rotatably attached to the support base 27 around a rotation axis extending along the left-right direction. The rollers 26a, 27a support the roll body R from below in a state of contacting the outer peripheral surface of the lower portion of the roll body R.

[0019] The paper P unwound from the roll body R housed in the roll body housing portion 25 is drawn from the front side to the rear side of the support base 26 through the gap between the lower surface of the support base 26 and the bottom surface 21a of the paper feed tray 2.

[0020] A pair of conveyance rollers 28 is arranged on the paper feed tray 2. The pair of conveyance rollers 28 can convey the paper P while sandwiching the paper P that is unwound from the roll body R and passes through the gap between the lower surface of the support base 26 and the bottom surface 21a of the paper feed tray 2. In the present embodiment, the pair of conveyance rollers 28 conveys the paper P in the direction of rewinding the paper P onto the roll body R. The pair of conveyance rollers 28 rotates, for example, by an interlocking mechanism that interlocks with the pulling out of the paper feed tray 2 from the housing 1, in the direction of rewinding the sandwiched paper P onto the roll body R. Also, one of the rollers of the pair of conveyance rollers 28 may rotate by the drive of a motor. The pair of conveyance rollers 28 may convey the paper P in the direction of unwinding the paper P from the roll body R. The pair of conveyance rollers 28 may be able to convey the paper P in both the direction of unwinding the paper P from the roll body R and the direction of rewinding the paper P onto the roll body R.

[0021] The conveying unit 4 conveys the paper P unwound from the roll body R in the conveying direction. The conveying direction of the paper P by the conveying unit 4 is the direction in which the paper P is unwound from the roll body R. The conveying unit 4 has a feed roller 3, an intermediate roller pair 41, a conveying roller pair 42, a paper discharge roller pair 43, and a guide member 44.

[0022] The feed roller 3 feeds the paper P, which has been unwound from the roll R stored in the roll storage section 25, out of the feed tray 2. The feed roller 3 transports the paper P from front to back within the feed tray 2.

[0023] The feed roller 3 rotates around an axis aligned in the left-right direction, driven by a feed motor (not shown). The feed roller 3 is pivotally supported at the tip of an arm 3a. The arm 3a is rotatably supported by a support shaft 3b. The support shaft 3b is supported by the housing 1. The arm 3a is biased by a biasing member (not shown) so that the feed roller 3 approaches the bottom surface 21a of the feed tray 2. The arm 3a is configured to retract to a retracted position that does not interfere with the moving feed tray 2, in conjunction with the feed tray 2 moving from the inside to the outside of the housing 1.

[0024] When the feed motor is driven by the control unit 10, the feed roller 3 rotates, applying a forward-to-backward transport force to the paper P that is in contact with the feed roller 3. As a result, the paper P is fed out of the feed tray 2. In the feed tray 2 when it is mounted in the housing 1, the rear wall 22 located at the rear end is inclined such that its upper end is located behind the lower end. Therefore, the paper P fed out of the feed tray 2 is guided diagonally upward by the rear wall 22 of the feed tray 2.

[0025] The intermediate roller pair 41 consists of a drive roller that rotates by the drive of an intermediate motor (not shown) and a driven roller that moves along with the drive roller. When the intermediate motor (not shown) is driven by the control unit 10, the intermediate roller pair 41 rotates while gripping the paper P and transports the paper P. The intermediate roller pair 41 is located above the rear wall 22 of the feed tray 2. The intermediate roller pair 41 transports the paper P upward while gripping it as it is fed diagonally upward from the feed tray 2. The guide member 44 is located above the intermediate roller pair 41. The guide member 44 guides the paper P being transported upward by the intermediate roller pair 41 forward.

[0026] The transport roller pair 42 consists of a drive roller that rotates by the drive of a transport motor (not shown) and a driven roller that moves along with the drive roller. The paper discharge roller pair 43 consists of a drive roller that rotates by the drive of a paper discharge motor (not shown) and a driven roller that moves along with the drive roller. When the transport motor and paper discharge motor (not shown) are driven by the control unit 10, the transport roller pair 42 and the paper discharge roller pair 43 rotate while gripping the paper P to transport the paper P. The transport roller pair 42 is located behind the recording unit 6, and the paper discharge roller pair 43 is located in front of the recording unit 6. The transport roller pair 42 transports the paper P forward while gripping the paper P that has been guided forward by the guide member 44. The paper discharge roller pair 43 transports the paper P forward while gripping the paper P that has been transported forward by the transport roller pair 42.

[0027] The cutter 5 is located between the rear wall 22 of the feed tray 2 and the intermediate roller pair 41. The cutter 5 consists of, for example, a disc-shaped rotating blade and a driven blade. Alternatively, the cutter 5 may consist of a rotating blade and a fixed blade. The cutter 5 rotates and reciprocates along the left-right direction, driven by a cutting motor (not shown). The paper P, unwound from the roll body R and transported, is cut in the width direction by the cutter 5 when the cutting motor is driven by the control unit 10.

[0028] The recording unit 6 includes a head (not shown) with multiple nozzles formed on its lower surface and a driver IC (not shown). The recording unit 6 records an image on paper P that is fed from the feed tray 2 and transported by the transport unit 4. When the driver IC is driven by the control unit 10, ink is ejected from the nozzles of the head, and an image is formed on the paper P as it passes the image recording position opposite the lower surface of the head, which is transported by the transport unit 4. The recording unit 6 may be either a line type, which ejects ink from nozzles of a head that are in a fixed position, or a serial type, which ejects ink from nozzles of a head that moves in the left-right direction.

[0029] The output tray 7 is located in front of the recording unit 6 within the housing 1 and above the feed tray 2. The output tray 7 can be inserted into and removed from the housing 1 in the front-to-back direction through an opening 11b formed in the housing 1. The output tray 7 receives the paper P on which an image has been formed by the recording unit 6 and which has been transported forward by the pair of output rollers 43.

[0030] The paper detection unit 8 is located below the roll storage unit 25 and is capable of detecting the paper P being transported by the transport unit 4. In other words, the paper detection unit 8 corresponds to the "media detection unit" of the present invention. The specific configuration of the paper detection unit 8 will be described later. The detection position D at which the paper detection unit 8 detects the paper P is located in front of the transport roller pair 28 (upstream in the transport direction of the paper P).

[0031] Here, let L1 be the length along the transport path of the paper P by the transport unit 4, from the gripping position A of the paper P by the intermediate roller pair 41 to the gripping position B of the paper P by the transport roller pair 42. Also, let L2 be the length along the transport path of the paper P by the transport unit 4, from the detection position D of the paper P by the paper detection unit 8 to the cutting position C of the paper P by the cutter 5. In this case, L1 ≤ L2.

[0032] The control unit 10 is connected to the paper feeding motor, intermediate motor, transport motor, paper discharge motor, cutting motor, paper detection unit 8, and driver IC via an internal bus (not shown). The control unit 10 has a CPU (Central Processing Unit), ROM (Read Only Memory), and RAM (Random Access Memory). The ROM stores programs and data for the CPU to perform various controls. The RAM temporarily stores data used by the CPU when executing programs.

[0033] (Configuration of the paper detection unit 8) Next, the configuration of the paper detection unit 8 will be explained with further reference to Figures 2 to 8. In the following explanation, the direction in which the paper P is transported by the transport unit 4 within the feed tray 2 (the direction from the front) will simply be referred to as the "transport direction".

[0034] As shown in Figure 2, the paper detection unit 8 includes a pivot shaft 81 extending in the left-right direction, an actuator 82 rotatable around the pivot shaft, a spring 83 that applies a biasing force to the actuator 82, a detection member 84 rotatable around the pivot shaft, and a sensor 85 capable of detecting the movement of the actuator 82. As the actuator 82 rotates together with the pivot shaft 81, the detection member 84 also rotates. The sensor 85 is, for example, a photosensor having a light-emitting element and a light-receiving element (not shown). The detection member 84 rotates between a position that shields the optical path of the sensor 85 and a position that does not shield it.

[0035] As shown in Figure 4, the paper detection unit 8 is housed in the holder 9 and positioned in the housing space within the second support portion 14 on the bottom wall 12 of the housing 1. The actuator 82 is biased upward (counterclockwise in Figure 4) by a spring 83. As shown in Figure 3, a part of the actuator 82 protrudes above the second support portion 14 through an opening 18 formed in the upper wall 14a of the second support portion 14. As shown in Figure 4, when the feed tray 2 is mounted on the housing 1, a part of the actuator 82 enters the feed tray 2 through an opening 23 formed in the bottom wall 21 of the feed tray 2.

[0036] The portion of the actuator 82 that enters the feeding tray 2 is provided with a contact portion 82a that can come into contact with the roll paper Rp being transported by the transport unit 4. The pivot shaft 81 is located upstream of the contact portion 82a with respect to the transport direction.

[0037] As shown in Figure 4(a), when there is no paper P at the detection position D of the paper detection unit 8, the actuator 82 is positioned in a first position where a part of the actuator 82 is located on the transport path of the paper P (shown by a dashed line in the figure). When the actuator 82 is in the first position, as shown in Figure 5(a), the detection member 84 is positioned to block the optical path of the sensor 85.

[0038] The actuator 82 has an orthogonal surface 82b, which is perpendicular to the transport direction when the actuator 82 is in the first position. As shown in Figure 4(a), the orthogonal surface 82b is located on the transport path of the paper P when the actuator 82 is in the first position. When the actuator 82 is in the first position, the orthogonal surface 82b faces the upstream side (forward side) of the transport direction.

[0039] As shown in Figure 4(b), when the paper P is located at the detection position D of the paper detection unit 8, the actuator 82 moves to a second position, retracted from the transport path, when the paper P comes into contact with the contact portion 82a. The contact portion 82a is the part that contacts the paper P when the actuator 82 is in the second position. When the actuator 82 is in the second position, as shown in Figure 5(b), the detection member 84 is positioned so as not to obstruct the optical path of the sensor 85.

[0040] The second position is lower than the first position. As described above, the actuator 82 is biased upward by the spring 83. That is, the actuator 82 is biased in the direction from the second position toward the first position.

[0041] As described above, the paper detection unit 8 can detect that no paper P is located at detection position D when the actuator 82 is in the first position (see Figure 4(a)) and the detection member 84 is in a position that obstructs the optical path of the sensor 85 (see Figure 5(a)). Furthermore, the paper detection unit 8 can detect that paper P is located at detection position D when the actuator 82 is in the second position (see Figure 4(b)) and the detection member 84 is in a position that does not obstruct the optical path of the sensor 85 (see Figure 5(b)).

[0042] Here, let μ be the coefficient of friction between the actuator 82 and the paper P, and let N be the normal force that the actuator 82 receives from the paper P. At this time, as shown in Figure 6(a), the actuator 82, which is in contact with the paper P moving in the transport direction, receives a downward normal force N and a frictional force μN in the direction from the front. The direction of the resultant force R1 of the normal force N and the frictional force μN is diagonally downward and backward. That is, the actuator 82 receives a force from the paper P in the clockwise direction in Figure 6(a) (the direction from the first position to the second position).

[0043] Furthermore, when the feed tray 2 is pulled out from the housing 1, such as when jamming, or when the paper P is transported by the transport roller pair 28 in the direction of rewinding onto the roll body R, the paper P may be sent in the opposite direction to the transport direction by the transport unit 4 (from rear to front). At this time, as shown in Figure 6(b), the force that the actuator 82, which is in contact with the paper P moving in the opposite direction to the transport direction, receives from the paper P is a downward normal force N and a frictional force μN in the direction from rear to front. The direction of the resultant force R2 of the normal force N and the frictional force μN is diagonally downward and forward.

[0044] Here, in a plane perpendicular to the left-right direction (the extending direction of the pivot axis 81), let S1 be a straight line that is perpendicular to the conveying direction and passes through the contact portion 82a. Furthermore, let α be the angle between the direction of the resultant force R2 and the straight line S1. In this case, tanα = μN / N = μ. Therefore, α = Atan(μ).

[0045] Furthermore, as shown in Figure 5(b), in a plane perpendicular to the left-right direction, the line S2 is defined as the line connecting the center of the pivot axis 81 and the contact portion 82a when the actuator 82 is in the second position. In addition, the angle between line S1 and line S2 is defined as angle θ.

[0046] If α > θ, the actuator 82 receives a force from the paper P in the counterclockwise direction in Figure 6(a) (direction from the second position to the first position). In this case, a large force is applied to the paper P, which may cause damage. If α ≤ θ, the actuator 82 receives a force from the paper P in the clockwise direction in Figure 6(a) (direction from the first position to the second position). In this embodiment, the relationship α (= Atan(μ)) ≤ θ is satisfied. Also, μ is 1.2 or less.

[0047] Furthermore, when the feeding tray 2 is withdrawn from the housing 1, the actuator 82 comes into contact with the edge of the opening 23 formed in the bottom wall 21 of the feeding tray 2, as shown in Figure 7. As a result, the actuator 82 rotates clockwise in Figure 7 and is pushed down to a third position (see Figure 8(a)) which is lower than the second position. The third position is on the opposite side of the second position from the first position in the vertical direction (the direction perpendicular to the transport path). When the actuator 82 is in the third position, the sensing member 84 is in the position shown in Figure 8(b).

[0048] As described above, the paper detection unit 8 is housed in the holder 9 and positioned in the storage space within the second support unit 14. As shown in Figure 8, the holder 9 is open from above. The holder 9 covers the paper detection unit 8 from below, both sides in the left-right direction, and both sides in the front-back direction. The holder 9 corresponds to the "covering plate" of the present invention.

[0049] The portion of the holder 9 that covers the paper detection unit 8 from below has openings 91 (see Figure 8(a)) and 92 (see Figure 8(b)). As shown in Figure 8(a), when the actuator 82 is in the third position, the lowest part of the actuator 82 is located within opening 91. That is, the space defined by opening 91 corresponds to the "receiving space" of the present invention. Also, as shown in Figure 8(b), opening 92 is located below the tip of the detection member 84 when the actuator 82 is in the third position.

[0050] A reinforcing plate 95 is positioned near the portion of the holder 9 that covers the pivot axis 81 of the paper detection unit 8. The reinforcing plate 95 is made of sheet metal and extends along the direction of extension (left-right direction) of the pivot axis 81. The reinforcing plate 95 has a roughly L-shaped cross-section on a plane perpendicular to the left-right direction. The reinforcing plate 95 covers the holder 9 from the front and below.

[0051] As shown in FIG. 3, a convex portion 15 that bulges upward is formed on the upper wall 14a of the second support portion 14. The convex portion 15 has a first portion 15a and a second portion 15b that bulges further upward from the upper part of the first portion 15a. As shown in FIG. 8(a), due to the provision of the convex portion 15, an expansion portion 17 that bulges upward (on the conveyance path side of the sheet P) is formed in the accommodation space within the second support portion 14.

[0052] Here, let the height position of the upper surface of the portion where the convex portion 15 is not formed in the second support portion 14 be H1, the height position of the upper surface of the portion where the first portion 15a of the convex portion 15 is formed be H2, and the height position of the upper surface of the portion where the second portion 15b of the convex portion 15 is formed be H3. At this time, H1 < H2 < H3.

[0053] A part of the rotation shaft 81 is disposed in the expansion portion 17 within the second support portion 14. More specifically, as shown in FIG. 8, a recess 16 that depresses upward is formed on the lower surface of the portion where the first portion 15a of the convex portion 15 is formed on the upper wall 14a of the second support portion 14. The portion where the recess 16 is formed on the upper wall 14a is thinner than other portions. The recess 16 extends along the left - right direction. The rotation shaft 81 is disposed in the vicinity of the portion where the recess 16 is formed on the upper wall 14a such that the upper part thereof is located within the recess 16. The actuator 82 is disposed in the portion where the second portion 15b of the convex portion 15 is formed within the second support portion 14.

[0054] (Control by the control unit 10) The control unit 10 controls each part of the printer 100 according to the output signal from the sensor 85 of the paper detection unit 8. Here, an example of the control performed by the control unit 10 will be described.

[0055] When the paper feed tray 2, with the paper P loaded, is mounted on the housing 1, the actuator 82 of the paper detection unit 8 moves to the second position shown in Figure 4(b). Here, "with the paper P loaded" means that the paper P, unwound from the roll R stored in the roll storage unit 25, has been pulled out to near the rear end of the paper feed tray 2. When the paper feed tray 2 in this state is mounted on the housing 1, the feed roller 3 comes into contact with the paper P, enabling the paper P to be fed.

[0056] As described above, when the paper feed tray 2 with the paper P loaded is attached to the housing 1, the paper P is positioned at the detection position D of the paper detection unit 8, so the actuator 82 moves to the second position. Then, as shown in Figure 5(b), the detection member 84 is positioned so as not to obstruct the optical path of the sensor 85. Based on the output signal from the sensor 85 at this time, the control unit 10 determines that the paper P is positioned at the detection position D of the paper detection unit 8.

[0057] Furthermore, if the rollers 26a and 27a are drive rollers, and the roll housing 25 is equipped with a mechanism for unwinding and feeding the paper P from the roll R, the paper P may be fed out from the roll housing 25 after the feeding tray 2 is mounted on the housing 1. In this case, the leading edge of the paper P fed out from the roll housing 25 comes into contact with the orthogonal plane 82b of the actuator 82, which is located in the first position (see Figure 4(a)). As a result, the actuator 82 is pushed by the paper P and rotates from the first position to the second position (see Figure 4(b)). The detection member 84 then moves to a position that does not obstruct the optical path of the sensor 85, as shown in Figure 5(b). Based on the output signal from the sensor 85 at this time, the control unit 10 determines that the paper P is located at the detection position D of the paper detection unit 8.

[0058] Subsequently, when the transport unit 4 transports the paper P, the actuator 82 of the paper detection unit 8 comes into contact with the paper P moving in the transport direction and remains in the second position (see Figure 4(b)). The detection member 84 then remains in a position that does not obstruct the optical path of the sensor 85 (see Figure 5(b)). Therefore, based on the output signal from the sensor 85, the control unit 10 determines that the paper P is located at the detection position D of the paper detection unit 8.

[0059] Then, when the paper P is completely unwound from the core member Rc and the rear end of the paper P passes the detection position D of the paper detection unit 8, the actuator 82 of the paper detection unit 8 moves to the first position (see Figure 4(a)). Then, the detection member 84 moves to a position that blocks the optical path of the sensor 85 (see Figure 4(a)). The control unit 10 determines that the rear end of the paper P has reached the detection position D of the paper detection unit 8 based on the change in the output signal from the sensor 85 when the detection member 84 moves from a position that does not block the optical path of the sensor 85 to a position that blocks it.

[0060] Here, when the paper P is completely unwound from the core member Rc, the impact when the rear end of the paper P passes the transport roller pair 28 may cause distortion in the image recorded by the recording unit 6. Therefore, when the control unit 10 determines that the rear end of the paper P has reached the detection position D of the paper detection unit 8, which is located upstream of the transport roller pair 28 in the transport direction, it controls the recording of the image by the recording unit 6 to suppress distortion of the recorded image when the rear end of the paper P passes the transport roller pair 28.

[0061] For example, when the control unit 10 determines that the trailing edge of the paper P has reached the detection position D of the paper detection unit 8, it interrupts the recording of the image by the recording unit 6. Also, when the control unit 10 determines that the trailing edge of the paper P has reached the detection position D of the paper detection unit 8, it can predict the timing at which the trailing edge of the paper P will pass the transport roller pair 28 based on the length between the detection position D of the paper detection unit 8 and the transport roller pair 28, as well as the transport speed of the paper P. Therefore, for example, if the recording unit 6 is serial, the control unit 10 may control the recording unit 6 to halve the ink density ejected from the nozzle at the timing when the trailing edge of the paper P passes the transport roller pair 28, and to repeat the print pass (ejection scan) twice.

[0062] Furthermore, as described above, the length L1 along the transport path from the clamping position A by the intermediate roller pair 41 to the clamping position B by the transport roller pair 42 is less than or equal to the length L2 along the transport path from the detection position D of the paper detection unit 8 to the cutting position C by the cutter 5. If paper P shorter than L1 is transported in the transport direction, it cannot be transported between the intermediate roller pair 41 and the transport roller pair 42, causing a jam.

[0063] If the rear end of the paper P has not yet reached the detection position D of the paper detection unit 8 at the time the cutter 5 cuts the paper P, then the remaining length of the paper P is L1 or more. Therefore, if the control unit 10 determines that the rear end of the paper P has not yet reached the detection position D of the paper detection unit 8 at the time the cutter 5 cuts the paper P, it permits the transport unit 4 to transport the paper P thereafter. On the other hand, if the control unit 10 determines that the rear end of the paper P has already reached the detection position D of the paper detection unit 8 at the time the cutter 5 cuts the paper P, it prohibits the transport unit 4 from transporting the paper P thereafter.

[0064] (Characteristics of the embodiment) As described above, the printer 100 of this embodiment includes a paper detection unit 8 capable of detecting paper P being transported by the transport unit 4. The paper detection unit 8 includes a pivot shaft 81 extending in a direction intersecting the transport direction of the paper P, an actuator 82 that is rotatable about the pivot shaft 81 and has a contact portion 82a that can contact the transported paper P, and is movable between a first position where a portion is located on the transport path of the paper P and a second position where the paper P is moved away from the transport path when it comes into contact with the contact portion 82a, a spring 83 that biases the actuator 82 in the direction from the second position toward the first position, and a sensor 85 capable of detecting the movement of the actuator 82 between the first position and the second position. In a plane perpendicular to the extending direction of the pivot axis 81, the angle θ between the straight line S2 connecting the pivot axis 81 and the contact portion 82a when the actuator 82 is in the second position and the straight line S1 perpendicular to the transport direction and passing through the contact portion 82a, and the coefficient of friction μ between the actuator 82 and the paper P satisfy the relationship Atan(μ)≦θ.

[0065] With the above configuration, the actuator 82 receives a force from the paper P in the direction from the first position to the second position, whether it is in contact with the paper P moving in the transport direction or in the direction opposite to the transport direction. Therefore, damage to the paper P can be suppressed. In addition, compared to the case where the pivot shaft 81 is configured to be away from the transport path, the space required for the paper detection unit 8 in the direction perpendicular to the transport path of the paper P can be reduced.

[0066] Furthermore, in the printer 100 of the above-described embodiment, the coefficient of friction μ between the actuator 82 and the paper P is 1.2 or less. As the coefficient of friction μ decreases, Atan(μ) decreases. Therefore, in this embodiment where the coefficient of friction μ is 1.2 or less, the range of θ that satisfies the relationship Atan(μ)≦θ is relatively wide. Thus, the degree of design freedom is improved.

[0067] Furthermore, in the printer 100 of the above-described embodiment, the actuator 82 has an orthogonal surface 82b that is perpendicular to the transport direction when it is in the first position, and the paper P rotates from the first position to the second position when it comes into contact with the orthogonal surface 82b. Therefore, the movement of the actuator 82 from the first position to the second position can be made smooth.

[0068] In addition, in the printer 100 of the above embodiment, the pivot shaft 81 is located upstream of the contact portion 82a with respect to the transport direction. Therefore, the actuator 82 can move smoothly from the first position to the second position.

[0069] Furthermore, in the printer 100 of the above-described embodiment, the housing 1 into which the paper feed tray 2 is attached and detached has thickness in a direction perpendicular to the transport path (vertical direction), and has a second support portion 14 that supports the front end of the paper feed tray 2. The paper detection unit 8 is arranged in the storage space within the second support portion 14. In this embodiment, the paper detection unit 8 can reduce the space required for placement in the direction perpendicular to the transport path of the paper P, so it is possible to place the paper detection unit 8 even if the thickness of the second support portion 14 of the housing 1 is relatively small.

[0070] Furthermore, in the printer 100 of the above-described embodiment, the housing space of the second support part 14 has an expanded part 17 that bulges out toward the transport path side, and the pivot shaft 81 is located in the expanded part 17. Therefore, the position of the pivot shaft 81 can be brought closer to the transport path, so the angle θ can be increased. Thus, the space required for the paper detection unit 8 in the direction perpendicular to the transport path can be reliably reduced.

[0071] Furthermore, the printer 100 in the above-described embodiment is positioned near the pivot shaft 81 and includes a reinforcing plate 95 that extends along the direction of extension of the pivot shaft 81. Therefore, the effect of the deflection of the second support portion 14 on the pivot shaft 81 can be suppressed. Thus, a decrease in the detection accuracy of the paper detection unit 8 can be avoided.

[0072] In addition, in the printer 100 of the above-described embodiment, the paper detection unit 8 is housed in the holder 9 and positioned in the housing space within the second support unit 14. The holder 9 covers the paper detection unit 8 from below. An opening 91 is formed in the holder 9, and when the actuator 82 is in the third position, which is on the opposite side of the second position from the first position with respect to the direction perpendicular to the paper transport path of the paper P, a part of the actuator 82 is located within the opening 91. Therefore, the space required for the paper detection unit 8 in the direction perpendicular to the paper transport path of the paper P can be reliably reduced.

[0073] Furthermore, the printer 100 in the above-described embodiment is positioned in a feed tray 2 capable of accommodating a roll body R, and is equipped with a pair of transport rollers 28 capable of transporting the paper P while gripping it after it has been unwound from the roll body R. The paper detection unit 8 can detect the paper P upstream of the pair of transport rollers 28 in the transport direction. The impact when the roll body R is completely unwound and the trailing end of the paper P passes the pair of transport rollers 28 may cause distortion in the recorded image in the recording unit 6. In this embodiment, by detecting the paper P upstream of the pair of transport rollers 28 in the transport direction, the trailing end of the paper P can be detected before it reaches the pair of transport rollers 28. Therefore, the recording in the recording unit 6 can be controlled based on the detection result of the paper detection unit 8 to suppress distortion in the recorded image.

[0074] Although embodiments of the present invention have been described above with reference to the drawings, it should be understood that the specific configurations are not limited to these embodiments. The scope of the present invention is indicated by the claims rather than the above description of embodiments, and all modifications within the meaning and scope equivalent to the claims are included.

[0075] In the above-described embodiment, the paper detection unit 8 was described as being able to detect paper P being transported within the feed tray 2, but it is not limited to this. The paper detection unit 8 only needs to be able to detect paper P being transported by the transport unit 4, and may detect paper P downstream of the feed tray 2 with respect to the transport direction of paper P by the transport unit 4.

[0076] Furthermore, in the above-described embodiment, the paper detection unit 8 was described as being located in the storage space within the second support portion 14 that constitutes the housing 1, but the arrangement of the paper detection unit 8 is not limited to this. That is, for example, the paper detection unit 8 may be located inside the housing 1.

[0077] Furthermore, although the above embodiment described the case in which the pivot shaft 81 extends along a direction perpendicular to the paper transport direction (left-right direction), the pivot shaft 81 only needs to extend along a direction intersecting the paper transport direction.

[0078] Furthermore, although the above-described embodiment described a case in which the actuator 82 is biased by the spring 83 in the direction from the second position to the first position, the member that biases the actuator 82 can be any elastic member that undergoes elastic deformation.

[0079] Furthermore, although the above-described embodiment described a case where the coefficient of friction μ between the actuator 82 and the paper P is 1.2 or less, the coefficient of friction μ may be greater than 1.2.

[0080] In addition, although the above-described embodiment described a case in which the actuator 82 has an orthogonal plane 82b that is perpendicular to the transport direction when it is in the first position, the orthogonal plane 82b may not be present.

[0081] Furthermore, although the above-described embodiment described a case in which the pivot shaft 81 is located upstream of the contact portion 82a with respect to the conveying direction, the pivot shaft 81 may also be located downstream of the contact portion 82a with respect to the conveying direction.

[0082] Furthermore, in the above-described embodiment, the case in which the storage space within the second support section 14 where the paper detection unit 8 is located has an expanded section 17 that bulges out toward the transport path side was explained, but the expanded section 17 may be omitted.

[0083] In addition, although the above embodiment described a case in which a reinforcing plate 95 is placed near the pivot axis 81, the reinforcing plate 95 may be omitted.

[0084] Furthermore, in the above-described embodiment, a case was described in which an opening 91 is formed in the holder 9 that houses the paper detection unit 8, where a part of the actuator 82 is located when the actuator 82 is in the third position, but the opening 91 may be omitted.

[0085] Furthermore, in the above-described embodiment, the case was explained in which the length L1 along the transport path from the clamping position A by the intermediate roller pair 41 to the clamping position B by the transport roller pair 42 is less than or equal to the length L2 along the transport path from the detection position D of the paper detection unit 8 to the cutting position C by the cutter 5. However, the length L1 may be longer than the length L2.

[0086] Furthermore, in the above-described embodiment, a transport roller pair 28 is arranged on the feed tray 2, and the paper detection unit 8 is capable of detecting the paper P upstream of the transport roller pair 28 with respect to the transport direction. However, the invention is not limited to this. That is, the transport roller pair 28 does not need to be arranged on the feed tray 2. Also, the paper detection unit 8 may be capable of detecting the paper P downstream of the transport roller pair 28 with respect to the transport direction.

[0087] In addition, although the above-described embodiment described a case in which the transport unit 4 can transport the paper P in the direction of unwinding the paper P from the roll body R, it is not limited to this. The transport unit 4 may be able to transport the paper P in both the direction of unwinding the paper P from the roll body R and the direction of rewinding the paper P onto the roll body R.

[0088] The present invention can be applied to any device equipped with a transport unit for transporting a sheet-like medium. The sheet-like medium is not limited to paper unwound from a roll R, but may also be cut paper. Furthermore, the sheet-like medium is not limited to paper, but may also be cloth, film, or other resin materials as long as it is in sheet form. The present invention can also be applied to scanners that transport and read original documents. When applying the present invention to an image recording device, it can be applied not only to inkjet printers equipped with a head that ejects ink from nozzles as a recording unit, but also to electrophotographic printers equipped with a laser type recording unit that forms an electrostatic latent image by exposing a photoreceptor with a laser, or an LED type recording unit that forms an electrostatic latent image by exposing a photoreceptor with an LED. [Explanation of Symbols]

[0089] 1 cabinet 2 Feeding trays 4. Conveying section 6. Records Section 8. Paper detection unit (media detection unit) 9. Holder (covering plate) 14 Second support part (wall part) 17. Expansion section 28 Conveyor roller pair 81 rotational axes 82 Actuators 82a Contact part 82b Orthogonal plane 83. Spring (Biasing Member) 85 Sensors 95 Reinforcement plate

Claims

1. A feeding tray capable of accommodating a roll body in which a sheet-like medium is wound into a roll shape, A transport unit capable of transporting sheet-like media, The system includes a media detection unit capable of detecting a sheet-like medium that is unwound from the roll body contained in the feeding tray and transported within the feeding tray by the transport unit. The aforementioned media detection unit, A pivot shaft extending in a direction intersecting the conveying direction of the sheet-like medium conveyed by the conveying unit, An actuator that is rotatable about the pivot axis and has a contact portion that can contact a sheet-like medium conveyed by the conveying unit, and is movable between a first position in which a portion is located on the conveying path of the sheet-like medium by the conveying unit, and a second position in which the sheet-like medium is retracted from the conveying path when it comes into contact with the contact portion, A biasing member that biases the actuator in the direction from the second position toward the first position, The system includes a sensor capable of detecting the movement of the actuator between the first position and the second position. In a plane perpendicular to the extending direction of the pivot axis, the angle θ between a first straight line connecting the pivot axis and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ) < θ. The housing further comprises a wall portion having thickness in a direction perpendicular to the transport path, and a housing that detachably supports the feed tray. The sheet transport device is characterized in that the media detection unit is located in the storage space within the wall.

2. The aforementioned storage space has an expanded portion that bulges out toward the transport path side, The sheet conveying device according to claim 1, characterized in that the pivot shaft is located in the expansion portion.

3. The sheet conveying device according to claim 1 or 2, further comprising a reinforcing plate positioned near the pivot axis and extending along the direction of extension of the pivot axis.

4. A feeding tray capable of accommodating a roll body in which a sheet-like medium is wound into a roll shape, A transport unit capable of transporting sheet-like media, The system includes a media detection unit capable of detecting a sheet-like medium that is unwound from the roll body contained in the feeding tray and transported within the feeding tray by the transport unit. The aforementioned media detection unit, A pivot shaft extending in a direction intersecting the conveying direction of the sheet-like medium conveyed by the conveying unit, An actuator that is rotatable about the pivot axis and has a contact portion that can contact a sheet-like medium conveyed by the conveying unit, and is movable between a first position in which a portion is located on the conveying path of the sheet-like medium by the conveying unit, and a second position in which the sheet-like medium is retracted from the conveying path when it comes into contact with the contact portion, A biasing member that biases the actuator in the direction from the second position toward the first position, The system includes a sensor capable of detecting the movement of the actuator between the first position and the second position. In a plane perpendicular to the extending direction of the pivot axis, the angle θ between a first straight line connecting the pivot axis and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ) < θ. The system further includes a covering plate that covers the medium detection unit from the opposite side of the conveying path relative to the pivot axis in a direction perpendicular to the conveying path, The sheet conveying device is characterized in that the covering plate is provided with a receiving space for receiving a part of the actuator when the actuator is in a third position opposite to the first position with respect to the direction perpendicular to the conveying path, with the second position in between.

5. A feeding tray capable of accommodating a roll body in which a sheet-like medium is wound into a roll shape, A transport unit capable of transporting sheet-like media, The system includes a media detection unit capable of detecting a sheet-like medium that is unwound from the roll body contained in the feeding tray and transported within the feeding tray by the transport unit. The aforementioned media detection unit, A pivot shaft extending in a direction intersecting the conveying direction of the sheet-like medium conveyed by the conveying unit, An actuator that is rotatable about the pivot axis and has a contact portion that can contact a sheet-like medium conveyed by the conveying unit, and is movable between a first position in which a portion is located on the conveying path of the sheet-like medium by the conveying unit, and a second position in which the sheet-like medium is retracted from the conveying path when it comes into contact with the contact portion, A biasing member that biases the actuator in the direction from the second position toward the first position, The system includes a sensor capable of detecting the movement of the actuator between the first position and the second position. In a plane perpendicular to the extending direction of the pivot axis, the angle θ between a first straight line connecting the pivot axis and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ) < θ. The housing further comprises a detachable support for the aforementioned feeding tray, The actuator is When the feeding tray is mounted in the housing, a portion of it enters the feeding tray through an opening formed in the bottom wall of the feeding tray. A sheet conveying device characterized in that when the feeding tray is withdrawn from the housing, it comes into contact with the edge of the opening in the bottom wall, causing it to rotate to a third position opposite to the first position, with respect to the direction perpendicular to the conveying path, with the second position in between.

6. The sheet conveying device according to any one of claims 1 to 5, characterized in that the coefficient of friction μ is 1.2 or less.

7. The sheet conveying device according to any one of claims 1 to 6, characterized in that the actuator has an orthogonal surface perpendicular to the conveying direction when it is in the first position, and the sheet-like medium rotates from the first position to the second position by contact with the orthogonal surface.

8. The sheet conveying device according to claim 7, characterized in that the pivot shaft is located upstream of the contact portion with respect to the conveying direction.

9. A feeding tray capable of accommodating a roll body in which a sheet-like medium is wound into a roll shape, A transport unit capable of transporting sheet-like media, A media detection unit capable of detecting a sheet-like medium that is unwound from the roll body contained in the feeding tray and transported within the feeding tray by the transport unit, The system includes a recording unit that records an image on a sheet-like medium transported by the transport unit, The aforementioned media detection unit, A pivot shaft extending in a direction intersecting the conveying direction of the sheet-like medium conveyed by the conveying unit, An actuator that is rotatable about the pivot axis and has a contact portion that can contact a sheet-like medium conveyed by the conveying unit, and is movable between a first position in which a portion is located on the conveying path of the sheet-like medium by the conveying unit, and a second position in which the sheet-like medium is retracted from the conveying path when it comes into contact with the contact portion, A biasing member that biases the actuator in the direction from the second position toward the first position, The system includes a sensor capable of detecting the movement of the actuator between the first position and the second position. In a plane perpendicular to the extending direction of the pivot axis, the angle θ between a first straight line connecting the pivot axis and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ) < θ. The housing further comprises a wall portion having thickness in a direction perpendicular to the transport path, and a housing that detachably supports the feed tray. The image recording device is characterized in that the media detection unit is located in the storage space within the wall portion.

10. A feeding tray capable of accommodating a roll body in which a sheet-like medium is wound into a roll shape, A transport unit capable of transporting sheet-like media, A media detection unit capable of detecting a sheet-like medium that is unwound from the roll body contained in the feeding tray and transported within the feeding tray by the transport unit, The system includes a recording unit that records an image on a sheet-like medium transported by the transport unit, The aforementioned media detection unit, A pivot shaft extending in a direction intersecting the conveying direction of the sheet-like medium conveyed by the conveying unit, An actuator that is rotatable about the pivot axis and has a contact portion that can contact a sheet-like medium conveyed by the conveying unit, and is movable between a first position in which a portion is located on the conveying path of the sheet-like medium by the conveying unit, and a second position in which the sheet-like medium is retracted from the conveying path when it comes into contact with the contact portion, A biasing member that biases the actuator in the direction from the second position toward the first position, The system includes a sensor capable of detecting the movement of the actuator between the first position and the second position. In a plane perpendicular to the extending direction of the pivot axis, the angle θ between a first straight line connecting the pivot axis and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ) < θ. The system further includes a covering plate that covers the medium detection unit from the opposite side of the conveying path relative to the pivot axis in a direction perpendicular to the conveying path, The image recording device is characterized in that the covering plate is provided with a receiving space for receiving a part of the actuator when the actuator is in a third position opposite to the first position with respect to the direction perpendicular to the transport path, with the second position in between.

11. A feeding tray capable of accommodating a roll body in which a sheet-like medium is wound into a roll shape, A transport unit capable of transporting sheet-like media, A media detection unit capable of detecting a sheet-like medium being transported by the transport unit, The system includes a recording unit that records an image onto a sheet-like medium which is unwound from the roll body housed in the feeding tray and transported within the feeding tray by the transport unit, The aforementioned media detection unit, A pivot shaft extending in a direction intersecting the conveying direction of the sheet-like medium conveyed by the conveying unit, An actuator that is rotatable about the pivot axis and has a contact portion that can contact a sheet-like medium conveyed by the conveying unit, and is movable between a first position in which a portion is located on the conveying path of the sheet-like medium by the conveying unit, and a second position in which the sheet-like medium is retracted from the conveying path when it comes into contact with the contact portion, A biasing member that biases the actuator in the direction from the second position toward the first position, The system includes a sensor capable of detecting the movement of the actuator between the first position and the second position. In a plane perpendicular to the extending direction of the pivot axis, the angle θ between a first straight line connecting the pivot axis and the contact portion when the actuator is in the second position and a second straight line perpendicular to the transport direction and passing through the contact portion, and the coefficient of friction μ between the actuator and the sheet-like medium satisfy the relationship Atan(μ) < θ. The housing further comprises a detachable support for the aforementioned feeding tray, The actuator is When the feeding tray is mounted in the housing, a portion of it enters the feeding tray through an opening formed in the bottom wall of the feeding tray. An image recording device characterized in that, when the feeding tray is withdrawn from the housing, it comes into contact with the edge of the opening in the bottom wall, causing it to rotate to a third position opposite to the first position, with respect to the direction perpendicular to the transport path, with the second position in between.

12. The transport tray further comprises a pair of transport rollers arranged on the transport tray, the transport rollers being capable of transporting a sheet-like medium unwound from the roll body while gripping it, The image recording device according to any one of claims 9 to 11, characterized in that the media detection unit is capable of detecting a sheet-like medium upstream of the transport roller pair with respect to the transport direction.

Images