JP7461155B2 - Printer - Google Patents

Description

The present invention relates to a printer.

2. Description of the Related Art Printers that issue receipts, tickets, etc. are known.

When issuing receipts or the like, the printer transports the recording medium on which image formation has been completed to an outlet, thereby discharging the recording medium from the printer. A cavity or window is provided in the upward, downward, or both directions along the transport path along which the recording medium is transported. With a configuration in which a cavity or window is provided in this way, if the transport of the recording medium is impeded, the recording medium is deformed so that it bends into a loop. In this way, jams are prevented.

Japanese Patent Application Publication No. 10-119375 JP 2008-68950 A JP2009-83447A JP2009-83448A JP 2011-156677 A

The above-described printer prevents a jam by releasing the recording medium whose conveyance is obstructed. On the other hand, even if the conveyance is restarted after the obstruction is resolved by opening the discharge port or the like, the recording medium may not be conveyed due to deformation of the recording medium or the like.

As a result, the user had to perform maintenance work such as adjusting the recording medium in order to resume image formation.

Therefore, there has been a need for a highly maintainable printer that requires less maintenance work to resume image formation.

According to one aspect of the present embodiment, the printer:
a conveyance unit that conveys the recording medium on which the image is formed to an ejection port;
a guide section that guides the recording medium being transported to the transport section;
a rotating part that rotates the guide part when conveyance of the recording medium to the discharge port is obstructed and the inhibition is released about a rotation fulcrum axis along the width direction of the recording medium; death,
The guide portion includes a through hole having a first surface facing one surface of the recording medium and a second surface facing the other surface of the recording medium,
When conveyance of the recording medium to the discharge port is obstructed, the rotating section rotates the guide section upward with the recording medium passed through the through hole to change the length of the conveyance path. is made longer than the distance from the conveyance section to the discharge port, and when the obstruction is released, the guide section is rotated downward with the recording medium passed through the through hole, and the conveyance path is rotated. It is characterized in that the length is made close to the distance from the conveyance section to the discharge port .

According to the printer of the present disclosure, maintenance work for restarting image formation can be reduced and maintainability can be improved.

FIG. 1 is an external perspective view showing an example of a printer. Cross-sectional view showing an example of a printer External perspective view showing an example of a guide part and a rotating part FIG. 1 is a three-view diagram showing an example of a guide portion and a rotating portion; FIG. 1 is a perspective view showing an example of the inside of a conveying path; FIG. 4 is a cross-sectional view showing an example of an operation in a first state; Cross-sectional view showing an example of operation in the second state FIG. 4 is a cross-sectional view showing an example of an operation in a third state; Cross-sectional view showing an example of operation in the fourth state Cross-sectional view showing an example of operation in the fifth state FIG. 13 is an external perspective view showing an example of a printer according to a second embodiment; Side view showing an example of detection in the first state FIG. 11 is a side view showing an example of detection in a second state; FIG. 11 is a side view showing an example of detection in a third state; FIG. 13 is an external perspective view showing an example of detection in a third state; FIG. 13 is a cross-sectional view showing an example of installation of an elastic body in the third embodiment. FIG. 13 is a cross-sectional view showing an example of compression of an elastic body in the third embodiment.

Details of each embodiment will be described below with reference to the attached drawings. Note that components having substantially the same functional configurations in the description of the specification and drawings relating to each embodiment will be denoted by the same reference numerals to avoid redundant description.

First Embodiment
(Printer example)
1 is an external perspective view showing an example of a printer. In the following description, the direction in which paper 101 is transported to be discharged is referred to as the "X direction." The direction perpendicular to the X direction is referred to as the "Y direction." The direction perpendicular to the XY plane and facing upward is referred to as the "Z direction."

The printer 100 has a hardware configuration including, for example, a housing 102, an outlet 103, and an image forming device 104.

The housing 102 holds, for example, the components that form the exhaust port 103.

The discharge port 103 discharges the paper 101 on which an image has been formed by the image forming device 104 to the outside of the printer. Therefore, the paper 101 discharged from the discharge port 103 becomes a receipt, ticket, or the like issued to the user.

The image forming device 104 forms an image on the paper 101 using, for example, a thermal printer format. Note that the image forming method by the image forming device 104 may be other than the thermal printer method.

Further, the image forming device 104 includes components such as actuators and rollers for conveying the paper 101 during image formation, paper feeding, and ejection, as well as an electronic circuit board for controlling the actuators and the like. Hereinafter, an example in which the conveying section is implemented by the image forming device 104 will be described.

The image forming device 104 also has an input device, a storage device, a control device, an arithmetic unit, etc. to control image formation and the printer 100.

Note that the image forming device 104 is not limited to the configuration and appearance as shown in the drawings, and may be any type of device as long as it is a device that can form an image on the paper 101 and eject the paper 101 from the ejection port 103 by transporting the image. , the configuration and the type of hardware used are not limited.

(Example of the configuration of the guide portion and the rotation portion)
The following description will be given with reference to a cross-sectional view taken along line AA'.

FIG. 2 is a sectional view showing an example of a printer. For example, the paper guide plate 105, which is an example of a guide section and a rotating section, is installed on the conveyance path for ejection, that is, between the image forming device 104 and the ejection port 103. The paper guide plate 105 is provided with a through hole 502 through which the paper 101 passes, for example, as shown in the figure.

When the paper 101 is being transported, that is, when the transport of the paper 101 is not obstructed and the paper 101 can be discharged, the image forming device 104 transports the paper 101, and the paper guide plate 105 is a mechanism that guides the paper 101 through the paper guide plate 105 toward the discharge port 103.

The paper guide plate 105 is made of a material such as metal, resin, or a combination of these.

Figure 3 is an external perspective view showing an example of a guide section and a rotating section.

FIG. 4 is a three-sided view showing an example of the guide section and the rotating section. Note that FIG. 4(A) is a side view, FIG. 4(B) is a top view, and FIG. 4(C) is a front view.

For example, the guide section and the rotating section are realized by a paper guide plate 105 having an appearance as shown in the figure. Specifically, the paper guide plate 105 has a shape having a rotation fulcrum shaft 501 and a through hole 502.

Through hole 502 is a mechanism that guides paper 101 in a specified direction (X direction in this example) by passing paper 101 through it. It is preferable that through hole 502 has a structure with an upper surface and a lower surface, as shown in the figure. For example, if through hole 502 has a structure that does not have either the upper surface or the lower surface, when paper 101 bends, paper 101 will escape to the side with no surface due to the bending. For this reason, paper 101 may not be guided in the specified direction. On the other hand, if the through hole has a structure with an upper surface and a lower surface as shown in the figure, paper 101 can be guided without escaping.

The rotation fulcrum shaft 501 is a mechanism that rotates the paper guide plate 105. Specifically, the paper guide plate 105 rotates around the rotation fulcrum shaft 501 as an axis (which coincides with the Y-axis in this example).

Further, it is desirable that the paper guide plate 105 has a shape that further includes a protrusion 503, which is an example of a protrusion and a prevention part, as shown in the figure. For example, the protrusion 503 is a rib-shaped protrusion. The protrusion 503 is a rib-shaped protrusion that engages with the casing to prevent bent paper from entering the space formed at the bottom of the paper guide plate 105 when the paper guide plate 105 rotates. Specifically, the protrusion 503 has the following mechanism.

FIG. 5 is an external perspective view showing an example of the inside of the conveyance path. When the paper guide plate 105 is rotating upward, the paper 101 may hit the inner wall of the casing and bend in an S-shape. Therefore, without the protrusion 503, the paper 101 may enter the space formed at the bottom of the paper guide plate 105. Then, when the paper guide plate 105 returns to its original state with the paper 101 having entered the space formed at the bottom of the paper guide plate 105, the paper 101 is caught between the paper guide plate 105 and the casing and is not transported. It may disappear.

Therefore, as shown in the figure, when the paper guide plate 105 is rotating upward, the protrusion 503 prevents the paper 101 from entering the space formed below the paper guide plate 105.

For example, when the paper guide plate 105 is not rotated upward, the protrusion 503 is stored so as to engage with the housing. Specifically, when stored, the gap of the protrusion 503 and the protrusion on the housing side engage with each other.

Further, the projection 503 has a rib-shaped gap, for example, as shown in the figure, and has a shape in which a projection on the bottom side of the casing engages with the projection 503 . The gap formed between the protrusions 503 is preferably narrower than the width of the paper 101. If the width of the gap is wider than the paper 101, there is a high possibility that the paper 101 will enter the gap. Therefore, it is desirable that the shape of the protrusion 503 as shown in the figure is such that there is a gap narrower than the width of the paper 101 and that the shape engages with the protrusion on the housing side.

Such a protrusion 503 prevents the paper 101 from becoming S-shaped and entering the space formed below the paper guide plate 105. If the paper 101 becomes S-shaped and enters the space formed below the paper guide plate 105, the paper 101 will be pinched between the paper guide plate 105 and the housing and bent. Therefore, the protrusion 503 forms a wall surface that repels the paper 101 that tries to enter, preventing the paper 101 from bending due to the S-shape, thereby preventing the paper 101 from jamming during automatic recovery and ensuring recovery.

For example, the paper guide plate 105 operates as follows.

FIG. 6 is a sectional view showing an example of operation in the first state.

FIG. 7 is a cross-sectional view showing an example of the operation in the second state.

FIG. 8 is a sectional view showing an example of operation in the third state.

FIG. 9 is a cross-sectional view showing an example of the operation in the fourth state.

FIG. 10 is a cross-sectional view showing an example of the operation in the fifth state.

The following describes an example where the states transition in the order of state 1, state 2, state 3, state 4, and state 5.

As shown in FIG. 6, when an obstacle 200 is placed near the discharge port 103 in the state shown in FIG. 2, the transport of the paper 101 is impeded. Specifically, in the state shown in FIG. 6, due to the presence of the obstacle 200, even if the image forming device 104 attempts to transport the paper 101 in the X direction, the paper 101 hits the obstacle 200 and cannot be discharged.

Note that factors that impede the transport of the paper 101 to the discharge port 103 are not limited to the installation of the obstacle 200. For example, a state in which a user pinches the edge of the paper 101, thereby resisting transport, can also be a factor that impedes the transport of the paper 101. Another factor that impedes the transport of the paper 101 is a state in which the paper 101 is pressed down from above, thereby resisting transport.

When the paper 101 is further transported in the first state, it changes to the second state.

As shown in FIG. 7, when the paper 101 is further conveyed in a state where it cannot be ejected in the X direction due to the obstacle 200, the force that tries to convey the paper 101 to the right in the figure and the force that tries to convey the paper 101 to the left due to the obstacle 200 are generated. The paper 101 bends in the vertical direction due to the repulsive force trying to push it back. In this way, in the second state, a force is generated in the paper 101 to lift it upward.

The paper 101 bends vertically. The paper guide plate 105 is lifted upward because its rotation is restricted so that it cannot move downwards as it hits the housing.

Therefore, the paper guide plate 105 rotates about the rotation fulcrum shaft 501 due to the lifting force of the paper 101. In this example, the paper guide plate 105 is rotated upward by the force that lifts the paper guide plate 105. Such rotation causes the paper guide plate 105 to rotate to the third state.

The state shown in FIG. 8 is an example of a state in which the paper 101 is bent to the maximum extent. For example, even when the paper 101 is bent to the maximum extent as shown in the figure, it is desirable to have a configuration in which the rotation of the paper guide plate 105 is restricted so as not to exceed a predetermined angle. Below, an example of a restriction mechanism will be described using a part of the housing (hereinafter simply referred to as "frame 52").

In the example shown in FIG. 8, the frame 52 is positioned so that it abuts the paper guide plate 105 that has been raised to a predetermined angle. Therefore, even if the paper guide plate 105 attempts to rotate further upward, the frame 52 restricts the upward rotation.

When the factors impeding the transport of the paper 101 are removed, the paper guide plate 105 rotates downward to return to its original state (details will be described later). At that time, if the paper guide plate 105 has rotated more than a certain angle, it may not rotate back to its original state. For example, if the paper guide plate 105 is lifted too high, it may rotate in the opposite direction (counterclockwise in the figure) to the direction in which it would return to its original state (clockwise in the figure) when the factors impeding the transport of the paper 101 are removed, or it may stop at the lifted position. On the other hand, if the frame 52 or the like is configured to not rotate more than a predetermined angle, it can rotate back to its original state, increasing the probability of returning to the first state.

The limiting mechanism does not have to be the frame 52. In other words, the limiting mechanism can be installed in any position, made of any material, or in any shape, as long as it can limit the rotation of the paper guide plate 105 beyond a certain angle. The limiting mechanism may also be configured to be shared with other mechanisms, such as the frame 52. If the limiting mechanism is configured as an integral part of another component, the number of components can be reduced compared to when a dedicated component is installed.

The specified angle is set to, for example, about 60°. The specified angle is set within a range where the paper guide plate 105 automatically returns to its original state, and is an angle that limits rotation. The specified angle is set appropriately depending on conditions such as the weight of the paper guide plate 105, the presence or absence of an elastic body that generates a force to rotate the paper guide plate 105 back to its original state, the type of recording medium, the size of the paper guide plate 105, or a combination of these. The specified angle may be set to a value smaller than the angle at which there is a risk that the paper guide plate 105 will not automatically return to its original state, to allow for some leeway.

The presence of the protrusion 503 prevents the paper 101 from entering the space formed below the paper guide plate 105, as shown in the figure. Specifically, the protrusion 503 prevents the paper 101 from entering in the direction indicated by the white arrow.

The prevention portion is a wall surface or the like (for example, a wall surface formed by protrusion 503 as shown in FIG. 5) that prevents paper 101 from entering the space formed under paper guide plate 105 when paper guide plate 105 rotates and is lifted up. On the other hand, the prevention portion is a mechanism that is stored under the conveying surface before paper guide plate 105 is lifted up. The presence of such a prevention portion can prevent paper from entering, and therefore prevents a situation in which paper 101 becomes entangled in paper guide plate 105 when paper guide plate 105 returns to its original state and image formation is resumed.

Note that the mechanism serving as the prevention portion is not limited to the mechanism shown in the drawings. For example, the prevention portion may have a structure such as a fixed slider crank mechanism. Further, the protrusion 503 has an angle formed by a conveyance surface (hereinafter referred to as "conveyance surface 61") and a surface of the protrusion 503 (hereinafter referred to as "protrusion surface 62") when the paper 101 is bent to the maximum extent. (hereinafter referred to as "protrusion angle 63") is preferably less than 90°. When the protrusion angle 63 is less than 90°, even if the paper 101 is bent to the maximum, the paper 101 can be guided to the discharge port 103 without becoming S-shaped.

As shown in the figure, after passing through the paper guide plate 105, the paper 101 is guided to pass between the protrusion surface 62 and the inner wall of the housing. Therefore, if the protrusion angle 63 is too steep when the paper 101 is in its maximum bending state, the paper 101 is likely to get into the space formed below the paper guide plate 105. On the other hand, if the protrusion 503 has a protrusion angle 63 of less than 90° when the paper 101 is in its maximum bending state, the paper 101 can be guided to the discharge port 103.

Furthermore, the protrusion 503 is made of resin such as rubber, for example. As mentioned above, since the protrusion 503 may become a part of the structure that guides the paper 101, it is desirable that the protrusion 503 be made of a material that allows the paper 101 to easily slide.

Next, let's say we transition to the fourth state.

As shown in FIG. 9, when the obstacle 200 that was hindering the transport of the paper 101 in the third state is removed, the state transitions from the third state to the fourth state.

In the fourth state, the paper 101 is transported in the X direction. Therefore, in the fourth state, the force trying to lift the paper guide plate 105 is weaker. On the other hand, the paper guide plate 105 is subjected to a force due to its own weight, i.e., gravity, which tries to return it to its original state, and compared to the third state, in the fourth state, gravity is relatively stronger than the force trying to lift the paper guide plate 105. Therefore, in the fourth state, the paper guide plate 105 rotates downward due to gravity. This downward rotation continues until the fifth state is reached.

The state shown in Figure 10 is the original state before the paper guide plate 105 is lifted.

In this way, the paper guide plate 105 is configured to rotate upward due to the force of the paper 101 lifting the paper guide plate 105, which occurs when the transport of the paper 101 to the discharge port 103 is obstructed.Then, when the obstruction of the transport of the paper 101 to the discharge port 103 is released, the paper guide plate 105 is configured to rotate downward due to the gravity of its own weight, which becomes stronger.

When the paper guide plate 105 rotates upward, the paper 101 is guided upward along the paper guide plate 105. For example, as shown in Figures 7 and 8, the paper 101 has its transport path changed to an upward direction by the paper guide plate 105. Therefore, if the transport of the paper 101 to the discharge port 103 is obstructed, the paper guide plate 105 changes the transport path to an upward direction, thereby lengthening the transport path. In this way, jams (also called "paper jams") can be reduced.

On the other hand, for example, as shown in FIG. 9, when the obstruction to conveyance of the paper 101 to the discharge port 103 is released, the paper guide plate 105 attempts to return to the state shown in FIG. 10 due to gravity. Therefore, after the third state is reached, the printer 100 can resume image formation because the paper guide plate 105 rotates without the need for maintenance work to restore the lifted state by an actuator or by hand. On the other hand, when maintenance work is required, especially for unmanned aircraft, it is necessary to call maintenance personnel to the site.

In this way, high maintainability can be ensured, requiring less maintenance work when restarting image formation.

Furthermore, in conventional methods, it is often difficult to determine whether or not a jam has occurred using a sensor or the like. On the other hand, in the above example, it is not necessary to determine whether or not a jam has occurred.

The paper 101 is also guided using the paper guide plate 105. As a result, the paper 101 is guided by the paper guide plate 105 and the protrusions 503, so it is less likely to become S-shaped and is less likely to bend.

For example, in the state shown in FIG. 8, if the protrusion 503 is not present, the paper 101 may become as shown by the dashed line. As shown by the dashed line, when the paper 101 enters the space formed at the bottom of the paper guide plate 105 and the paper guide plate 105 returns to its original state, the paper 101 may bend and may not be able to return. Therefore, if the projection 503 is configured to repel the paper 101 that is S-shaped and tries to enter the space formed at the bottom of the paper guide plate 105, the paper 101 will be caught between the paper guide plate 105 and the housing. This will prevent it from bending and bending. If the paper 101 is bent, it may cause a jam. On the other hand, if the paper guide plate 105 and the protrusion 503 are used, the paper 101 can be prevented from bending and jams can be reduced.

Furthermore, the above configuration allows the apparatus to take up less space than, for example, a configuration in which the recording medium is buffered and then ejected. In order to buffer and discharge the recording medium, it is necessary to secure a buffer space. On the other hand, in the above configuration, jams can be prevented by changing the conveyance path so that the paper 101 escapes upward, so that the apparatus can save space and be made smaller.

Further, even if the configuration is configured to detect a jam and stop processing such as image formation, the processing may not be able to be stopped suddenly. Therefore, there may be a time lag between the occurrence of a jam and the stoppage, so even in a configuration where processing such as image formation is stopped, the conveyance path is changed to allow the paper 101 to escape upward to some extent to allow the recording medium to escape. It is desirable to have a configuration that allows a transportation route to be secured.

As described above, it is preferable that the protrusion 503 is configured to move up and down in conjunction with the rotation of the paper guide plate 105. For example, when the transport of the paper 101 is impeded and the paper guide plate 105 is rotated and raised, it is preferable that the protrusion 503 is configured to appear in conjunction with the transport. On the other hand, it is preferable that the protrusion 503 is stored under the transport surface 61 before the paper guide plate 105 is lifted. If it is configured to move up and down in conjunction with the rotation of the paper guide plate 105, before the paper guide plate 105 is lifted, the protrusion 503 is stored and does not interfere with the transport of the paper 101. On the other hand, when the paper guide plate 105 is rotated and raised, the protrusion 503 plays a role in preventing the paper from entering.

The paper guide plate 105 has a mass of, for example, about 10 g. In other words, it is desirable that the paper guide plate 105 has a mass such that it can rotate due to the lifting force of the paper 101 when the transport of the paper 101 to the discharge port 103 is obstructed, and that it has a mass such that it generates a sufficient force to return to its original state due to gravity when the transport of the paper 101 to the discharge port 103 is no longer obstructed.

Further, the protrusion 503 may be formed integrally with the paper guide plate 105, or the protrusion 503 and the paper guide plate 105 may be separate parts, and one or the other may be attached.

The appropriate mass of the paper guide plate 105 varies depending on, for example, the type of recording medium. A mass of approximately 10 g is the mass of the type of recording medium used for receipts. The mass of the paper guide plate 105 may be adjusted by changing the material that constitutes the paper guide plate 105 or by adding weights depending on the environment, such as the type of recording medium, the conveying force, and the size of the recording medium. For example, if the recording medium is made of a hard material, it is desirable to increase the mass of the paper guide plate 105 in order to increase the gravitational force due to its own weight.

(Second embodiment)
The second embodiment differs from the first embodiment in that a detector and the like are added. Hereinafter, different points will be mainly explained and redundant explanations will be omitted.

Figure 11 is an external perspective view showing an example of a printer according to the second embodiment. The second embodiment is configured to install a sensor 201, which is an example of a detection unit, in the position shown in the figure.

The sensor 201 is, for example, a transmission type photosensor having a light projector and a light receiver. The sensor 201 is a device that detects whether an object is present between the light projector and the light receiver. In this example, the sensor 201 detects the presence or absence of the detection plate 504 and detects the rotation of the paper guide plate 105. Note that the detection plate 504 and the paper guide plate 105 operate in conjunction with each other.

Specifically, in the first, second, and third states, the sensor 201 detects the state as follows:

Figure 12 is a side view showing an example of detection in the first state.

FIG. 13 is a side view showing an example of detection in the second state.

Figure 14 is a side view showing an example of detection in the third state.

Note that FIGS. 12 to 14 are diagrams of the printer 100 viewed from the viewpoint 202.

FIG. 15 is a perspective view showing an example of detection in the third state.

As shown in FIG. 12, in the first state, that is, in the state where the paper guide plate 105 is not rotated and before the paper guide plate 105 is lifted, there is a notch formed in the detection plate 504 at the position of the sensor 201. 203 is located. Therefore, the sensor 201 detects a state in which the detection plate 504 is absent and the paper guide plate 105 is not rotating.

Next, based on the detection result indicating that the paper guide plate 105 has not yet rotated, the image forming device 104, which is an example of a control unit, forms an image. That is, before the paper guide plate 105 rotates, the paper 101 can be ejected, so the image forming device 104 forms an image and conveys the paper 101.

As shown in FIGS. 13 and 14, in the second or third state, that is, in the state in which the paper guide plate 105 is rotated and lifted upward, the detection plate 504 is located at the position of the sensor 201. Therefore, since the detection plate 504 is present, the sensor 201 detects that the paper guide plate 105 is rotating.

Next, based on the detection result indicating the rotating state, the image forming device 104 stops image formation.

Since the second state or the third state is a state in which upward rotation is being performed, it is also a state in which conveyance of the paper 101 to the discharge port 103 is inhibited. Therefore, it is difficult to eject the paper 101. Therefore, in such a state, jams can be prevented by stopping image formation and stopping conveyance.

The timing for stopping image formation does not have to be immediately after the second or third state is detected. In other words, even if the second or third state is detected, image formation may be continued to a certain extent. For example, depending on the image processing, it may not be possible to suddenly stop the processing. Therefore, it is desirable to stop image formation at a timing when stopping image formation or processing such as transport will cause few problems.

Furthermore, the detection unit is not limited to the configuration shown in the figure. For example, the sensor 201 may be an angle sensor, etc. In other words, the type of sensor is not important as long as it can detect whether the paper guide plate 105 has been lifted upward.

(Third embodiment)
The third embodiment differs from the first embodiment in that an elastic body is added. Hereinafter, different points will be mainly explained and redundant explanations will be omitted. Specifically, the third embodiment has, for example, the following configuration.

FIG. 16 is a sectional view showing an example of installing the elastic body in the third embodiment. For example, the third embodiment differs from the first embodiment in that a coil spring 300, which is an example of an elastic body, is connected.

The coil spring 300 generates a force that presses the paper guide plate 105 downward. For example, in the third state, the paper guide plate 105 compresses the coil spring 300 as follows.

FIG. 17 is a sectional view showing an example of compression of the elastic body in the third embodiment. In the third state, as shown in the figure, the coil spring 300 is compressed by upward rotation.

After this, the paper guide plate 105 transitions to the fourth state, i.e., when the force trying to lift the paper guide plate 105 weakens, the paper guide plate 105 returns to its original state due to gravity and the repulsive force of the coil spring 300.

The presence of such an elastic body allows the paper guide plate 105 to be returned to its original state more reliably.

The elastic body is not limited to a coil spring, and the spring constant, type, installation position, number, etc. are not important as long as it can generate a restoring force that returns the paper guide plate 105 to its original state.

Other Embodiments
The printer is not limited to the above configuration. For example, not all of the components shown in the figure are essential, and the printer may not have the components shown in the figure depending on the functions. On the other hand, the printer may have a configuration other than the components shown in the figure.

The printer may also be incorporated into another device or system for use.

Although the above describes the embodiment of the present invention, the above content does not limit the content of the invention. In other words, the present invention is not limited to the embodiment specifically disclosed above. Therefore, the embodiment can be modified, improved, or changed in various ways without departing from the scope of the claims.

52 Frame 61 Transport surface 62 Protrusion surface 63 Protrusion angle 100 Printer 101 Paper 102 Housing 103 Discharge port 104 Image forming device 105 Paper guide plate 200 Obstacle 201 Sensor 203 Notch 300 Coil spring 501 Rotation fulcrum shaft 502 Through hole 503 Protrusion 504 Detection plate

Claims (8)

a conveyance unit that conveys the recording medium on which the image is formed to an ejection port;
a guide section that guides the recording medium being transported to the transport section;
a rotating part that rotates the guide part when conveyance of the recording medium to the discharge port is obstructed and the inhibition is released about a rotation fulcrum axis along the width direction of the recording medium; death,
The guide portion includes a through hole having a first surface facing one surface of the recording medium and a second surface facing the other surface of the recording medium,
When conveyance of the recording medium to the discharge port is obstructed, the rotating section rotates the guide section upward with the recording medium passed through the through hole to change the length of the conveyance path. is made longer than the distance from the conveyance section to the discharge port, and when the obstruction is released, the guide section is rotated downward with the recording medium passed through the through hole, and the conveyance path is rotated. The length is made close to the distance from the conveyance section to the discharge port.
printer. a detection unit that detects rotation of the rotation unit;
The printer according to claim 1, further comprising a control section that stops forming the image on the recording medium when the detection section detects rotation of the rotation section. The printer according to claim 1 or 2, further comprising a protrusion that rotates in the same direction as the rotating portion in conjunction with the rotation of the rotating portion. The protrusion is installed at the lower part of the guide and prevents the recording medium from entering the space formed at the lower part of the guide when the rotating part is rotated upward. 4. The printer according to claim 3, further comprising a prevention section for preventing the above. 5. The printer according to claim 4, wherein a protrusion angle formed between a transport surface along which the transport section transports the recording medium and a surface of the protrusion is less than 90 degrees when the recording medium is flexed to the maximum extent. An elastic body connected to the rotating part,
The printer according to any one of claims 1 to 5, wherein the elastic body generates a force that returns the rotating portion that has rotated upward to its original state. 7. The printer according to claim 1, wherein the rotating portion rotates due to a force that is generated when transportation of the recording medium is interrupted and that lifts the guide portion by the recording medium. 8. The printer according to claim 1, further comprising a limiting mechanism for limiting the rotation of the rotating portion to a predetermined angle or more.

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