JP6443082B2 - Paper conveying apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet conveying apparatus that conveys a sheet from a sheet feeding source to a sheet feeding destination through a sheet passing path, and an image forming apparatus including the sheet conveying apparatus. More specifically, the present invention relates to a sheet conveying apparatus and an image forming apparatus in which a guide member for guiding a conveyed sheet is movable for jam processing or the like.

  2. Description of the Related Art Conventionally, image forming apparatuses and other apparatuses that handle paper are frequently used. In these apparatuses, a sheet conveying apparatus that conveys a sheet from a sheet feeding source that stores the sheet to a sheet feeding destination that performs some processing on the sheet (an image forming unit in the case of an image forming apparatus) is used. This type of paper transport device is required to be configured to open the paper passage route. This is because it is sometimes necessary to perform some work on the paper passing path, such as when a paper jam occurs and the paper is removed.

  As an example of a paper conveying apparatus that meets such a requirement, there is one described in Patent Document 1. In FIG. 3 of the same document, a “chute member 60” (hereinafter referred to as “the same member”) that constitutes a part of the sheet conveyance path and can be retracted is depicted in the retracted state ([[ 0046]). In the paper conveying apparatus of the same document, when the opening / closing door is opened for jam processing or the like, the same member is naturally brought into the retracted state due to its own weight.

JP 2007-55789 A

  However, the conventional techniques described above have the following problems. That is, in the paper transport device of Patent Document 1, the position of the same member in the paper transport state is the member on the paper body side (“57” in the figure) and the closed door (illustrated in the figure). It is understood that it is only regulated in the gap between (none). For this reason, it is considered that the positional accuracy of the member in the paper transport state is poor. In order to increase the positional accuracy of the member in the paper conveyance state, it is conceivable that the member is biased by some elastic member toward the position in the paper conveyance state. Note that “torsion spring S1” and the like in the same document do not play the role.

  However, the position accuracy of the same member cannot be obtained simply by itself. This is because the distortion of the member becomes a problem. In other words, urging the member with the elastic member toward the position in the paper conveyance state means that when the member is brought into the retracted state, the elastic member strongly receives the elastic force. Of course, the member cannot be a perfect rigid body. For this reason, if the member is kept in the retracted state, permanent deformation due to plastic deformation may occur in the member due to the elasticity of the elastic member applied to the member. As a result, the positional accuracy of the member cannot be obtained.

  The present invention has been made to solve the above-described problems of the prior art. That is, the object is to provide a sheet conveying apparatus and an image forming apparatus in which the guide member that guides the sheet is movable for jamming and the like, and the positional accuracy of the guide member during sheet conveyance is ensured. There is to do.

A sheet conveying apparatus according to an aspect of the present invention is an apparatus that conveys a sheet from a sheet feeding source to a sheet feeding destination by a sheet passing path, covers a single side of the sheet passing path, and is configured to be retractable. Located on the same side of the paper path as the path component and upstream of the path component in the paper transport direction, the transport position when transporting the paper, and farther from the paper path than the transport position Ri movable der between an open position, the conveying operation when moving toward the transfer position to the open position, the movable guide member Ru receiving at one end side in the width direction of the sheet conveyed, the movable guide member and a first biasing member and the second urging member for urging the position, first biasing member is placed on one end side in the width direction, the second biasing member, is disposed on the other end side in the width direction, the biasing force of the first urging member Those which are stronger than the biasing force of the second urging member.

In the paper transport device according to the above aspect, the path constituent member that covers one side of the paper passing path can be retracted in order to cope with the case where a paper jam occurs. In the state where the path constituent member is retracted, the movable guide member can also be set to the open position. However, at the normal time, the movable guide member is maintained at the transport position by the urging of the first urging member and the second urging member. Movable guide member, the operation when moving toward the transfer position to the open position, Runode receiving at one end side in the width direction of the paper, the movable guide member, the distorted by being an open position There is. However, even in this case, in this aspect, the positional accuracy of the movable guide member at the transport position is maintained high. This is because the first urging member provided on the one end side is stronger than the other second urging member.

In the sheet conveying apparatus of the embodiment, the movable guide member, the handle of the order is brought to by Ri open- position manual operation of the steering author can be configured as having the one end side in the width direction. If it does in this way, an operator can make a movable guide member into an open position, when an operator pulls a handle by hand in the state where a path member is retracted.

Further, in the sheet conveying device of the aspect or with connecting the through path component and the movable guide member, a movable guide member and an open position when retracting the path forming member, inherently path forming member from the retracted state It may have a connecting member which makes a movable guide member a conveyance position when it returns to this position, and a connecting member may be arranged at the above-mentioned one end side in the width direction . This is convenient because the movable guide member is also in the open position in conjunction with the path component member being in the retracted position.

  An image forming apparatus according to another aspect of the present invention includes a paper feeding unit, an image forming unit, and a paper transporting device according to any one of the above aspects that transports paper from the paper feeding unit to the image forming unit. It is what has. In such an image forming apparatus, the movable guide member can be opened, and the position accuracy at the transport position can be maintained for a long time. Therefore, the quality of image formation is high.

  According to this configuration, there is provided a sheet conveying device and an image forming apparatus in which a guide member for guiding a sheet is movable for jamming processing and the like, and the positional accuracy of the guide member during sheet conveyance is ensured. Yes.

1 is a cross-sectional view of an image forming apparatus according to an embodiment. It is sectional drawing of the paper conveying apparatus which concerns on a 1st form. It is sectional drawing which shows the movable guide member in a 1st form. It is a perspective view which shows the movable guide member in a 1st form. It is a top view which shows the movable guide member in a 1st form in a conveyance position. FIG. 3 is a cross-sectional view showing the sheet conveying apparatus according to the first embodiment in a state where an opening / closing door of the image forming apparatus is opened. It is a perspective view which shows the movable guide member in 1 aspect of a 1st form. It is sectional drawing (closed state) which shows the connection member of an opening-and-closing door and a movable guide member. It is sectional drawing (open state) which shows the connection member of an opening-and-closing door and a movable guide member. It is a top view which shows the movable guide member in a 1st form in an open position. It is a top view in the case of a comparative example in the state in the conveyance position when permanent deformation arises in the movable guide member.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the accompanying drawings. In this embodiment, the present invention is applied to the image forming apparatus 1 shown in FIG. The image forming apparatus 1 in FIG. 1 is a so-called printer having a sheet storage unit 10, an image forming unit 30, and a paper discharge unit 50. The paper storage unit 10 includes a paper cassette 11 and a paper feed roller 12. The paper cassette 11 stores paper, and the paper is picked up one by one by the paper feed roller 12.

  The image forming unit 30 is provided with an image forming unit 31, an exposure unit 32, a transfer roller 33, a timing roller 34, a timing sensor 35, and a fixing device 36. The image forming unit 31 is provided with a photosensitive drum 37, a developing roller 38, and the like. Thus, a toner image based on the image data is formed on the photosensitive drum 37, and the toner image is transferred to the paper supplied from the paper storage unit 10 and further fixed. Here, by the timing roller 34 and the timing sensor 35, the timing of entry of the paper into the transfer position is matched with the timing of forming the toner image. The paper discharge unit 50 is provided with a paper discharge roller 51 and a paper discharge tray 52. As a result, the printing paper on which the toner image has been fixed is discharged onto the paper discharge tray 52.

  In the image forming apparatus 1 having the overall configuration, the sheet conveying unit 20 between the sheet storage unit 10 and the image forming unit 30 is an application location of the present invention. Accordingly, the paper transport unit 20 has a function of transporting paper from the paper storage unit 10 as the paper supply source to the image forming unit 30 as the paper supply destination. Further, an opening / closing door 2 is provided in the lower part of the right side surface in FIG. In the image forming apparatus 1, the paper transport unit 20 is located immediately inside the opening / closing door 2. Hereinafter, details of the paper transport unit 20 will be described.

  FIG. 2 shows an enlarged view of the vicinity of the paper transport unit 20 in the image forming apparatus 1. In the paper transport unit 20 of FIG. 2, the paper passage route is mainly defined by the wall surface members 21 and 22. In addition to this, a conveyance roller 23 and a movable guide member 25 are provided in the sheet conveyance unit 20 of FIG. The transport roller 23 forms a roller pair, and transports the paper taken out one by one from the paper cassette 11 by the paper feed roller 12 to the paper passing path. The movable guide member 25 is a member that guides the paper drawn by the transport roller 23 to a gap portion sandwiched between the wall surface member 21 and the wall surface member 22.

  That is, in the paper transport unit 20 of FIG. 2, the gap F between the wall surface member 22 and the movable guide member 25 is a paper passage path in the first half portion, and between the wall surface member 22 and the wall surface member 21 in the second half portion. The gap G is a sheet passing path. As a result, the sheet is transported from the vicinity of the lower left transport roller 23 in FIG. 2 toward the upper timing roller 34 in FIG. 2. In FIG. 2, the timing sensor 35 is omitted. In FIG. 2, there is also a gap H between the movable guide member 25 and the wall surface member 21, and this gap H is a sheet fed from a lower cassette when the sheet cassette 11 has a multistage configuration. This is the part that passes.

  The movable guide member 25 in FIG. 2 is shown alone in FIG. The movable guide member 25 has a substantially inverted V shape in FIG. 3 and has a first portion 26 and a second portion 27. The first portion 26 is a portion facing the wall surface member 22 in FIG. 2, and the second portion 27 is a portion facing the wall surface member 21 in FIG. The movable guide member 25 is provided with a support shaft 28. In FIG. 2, the position of the support shaft 28 is fixed, and the movable guide member 25 can rotate to some extent around the support shaft 28. Further, as shown in FIG. 2, a tension spring 29 is attached to the movable guide member 25. The tension spring 29 pulls the first portion 26 of the movable guide member 25 downward in FIG. Due to this pulling force, the movable guide member 25 is urged counterclockwise in FIG. 2 (arrow M). Further, the wall member 22 is provided with a contact portion 19. In FIG. 2, the abutting portion 19 is located substantially at the height around the top of the movable guide member 25.

  The movable guide member 25 will be further described with reference to FIGS. FIG. 4 is a perspective view showing the entire shape of the movable guide member 25 together with the peripheral parts thereof. As shown in FIG. 4, contact portions 24 are provided at both ends of the movable guide member 25 in the width direction. The contact portion 24 is provided at a portion where the first portion 26 and the second portion 27 are connected in the movable guide member 25, that is, at the top portion. The contact portions 19 and 24 are both on the outer side in the width direction than the maximum width of the sheet to be conveyed.

  Further, as can be seen from FIG. 4, there are actually two tension springs 29 shown in FIG. The one on the front side in the width direction is called a tension spring 29A, and the one on the back side is called a tension spring 29B. The tension spring 29A and the tension spring 29B have slightly different characteristics, which will be described later. Hereinafter, when the tension spring 29A and the tension spring 29B are collectively referred to without distinction, they are simply referred to as a tension spring 29. In addition, the contact portions 19 and 24 are also indicated by subscripts A and B in order to distinguish the front side and the back side in the width direction.

  In FIG. 4, the contact portion 19 and the contact portion 24 are in contact with each other at both ends in the width direction due to the urging of the tension spring 29. Thereby, the position of the movable guide member 25 is in a positioned state. This state of the movable guide member 25 is a state where the paper transport unit 20 transports the paper. FIG. 2 is also in the same state. In this state, if the conveyed sheet is of a stiff type, a force is applied by the sheet to move the movable guide member 25 in the direction opposite to the biasing force of the pulling spring 29. However, the contact portion 19 and the contact portion 24 are not separated by such a force.

FIG. 5 shows a plan view of the movable guide member 25 and its surroundings as viewed from above. As shown in FIG. 5, a cutout portion 18 is formed in the first portion 26 of the movable guide member 25. This is to prevent interference with the transport roller 23. The state shown in FIG. 5 is also a state in which the contact part 19 and the contact part 24 are in contact with each other as in FIGS. This is because of the urging force M by the aforementioned pulling spring 29. This urging force M acts in the direction of narrowing the sheet passing path F between the wall surface member 22 and the movable guide member 25 (first portion 26) in FIG.

  On the other hand, the movable guide member 25 is positioned by the contact between the contact portion 19 and the contact portion 24. As a result, the sheet passing path F is secured. In this state, rattling of the movable guide member 25 is also suppressed by the biasing force M. Thus, in the paper transport unit 20, high positional accuracy of the movable guide member 25 is obtained. The conveyance of the sheet is performed with the movable guide member 25 in this position. Hereinafter, this position of the movable guide member 25 is referred to as a conveyance position of the movable guide member 25.

  As described above, in the image forming apparatus 1 of the present embodiment, a part of the exterior plate is the opening / closing door 2. In the description so far, it has been assumed that the door 2 is closed. When the door 2 is opened, the portion shown in FIG. 2 is in the state shown in FIG. In the state of FIG. 6, the wall surface member 21 is also separated from the main body portion of the image forming apparatus 1 together with the door 2. That is, the wall surface member 21 is integral with the open / close door 2. In FIG. 6, the wall surface member 21 is retracted from the wall surface member 22 and the sheet passing path G is opened. Therefore, when jammed paper is present in the paper passing path G, the jammed paper can be removed by opening the door 2 to the state shown in FIG. The opening / closing operation itself of the opening / closing door 2 may be a turning operation around the rotation axis, or may be a parallel movement operation drawn in parallel from the closed state. In the case of the turning operation, the rotation axis may be arranged vertically or horizontally.

  In FIG. 6, the movable guide member 25 is also drawn in an arrangement different from the state at the transfer position shown in FIG. That is, the movable guide member 25 in FIG. 6 is opened clockwise with respect to the movable guide member 25 shown in FIG. 2, that is, slightly rotated in the direction opposite to the arrow M in FIG. It is in. This position of the movable guide member 25 is referred to as an open position of the movable guide member 25. The movable guide member 25 in the open position is further away from the position through which the paper passes than in the conveyance position. When the movable guide member 25 is set to the open position, as illustrated in FIG. 6, the first portion 26 of the movable guide member 25 is separated from the wall surface member 22, and the sheet passing path F is opened. Therefore, when there is jammed paper in the sheet passing path F, the jammed paper can be removed by moving the movable guide member 25 to the open position. As is clear from the above description, the movable guide member 25 cannot be brought into the open position while the door 2 is closed.

  Here, a configuration for setting the movable guide member 25 to the open position will be described. Even if the movable door 25 is opened, the movable guide member 25 is not always opened by itself. Although not mentioned in the above description, a configuration for opening the movable guide member 25 is necessary. Here, two configurations are described: a configuration for manually opening the movable guide member 25 and a configuration for opening the movable guide member 25 in conjunction with opening of the open / close door 2.

  First, a configuration for opening the movable guide member 25 by manual operation will be described. The movable guide member 25 in this configuration includes a handle 17 as shown in FIG. The handle 17 is a projecting portion provided at the lower left end of the movable guide member 25 in FIG. This position is the end of the tension springs 29A and 29B that is closer to the tension spring 29A. Further, it is the position on the near side in the depth direction of the image forming apparatus 1. The handle 17 is also provided at the top of the movable guide member 25 in the height direction, that is, at a position where the first portion 26 and the second portion 27 are connected. This position is the position farthest from the support shaft 28 in the movable guide member 25. In FIG. 7, it is behind the handle 17, but the contact portion 24 </ b> A on the front side also exists in the movable guide member 25 shown in FIG. 7.

  In the image forming apparatus configured to include the handle 17 in the movable guide member 25, the movable guide member 25 is not immediately opened by opening the door 2. However, by opening the door 2, the movable guide member 25 can be seen from the outside. In actuality, the second portion 27 and the handle 17 of the movable guide member 25 are visible from the outside in this state. Therefore, when the operator grips and pulls the handle 17 with his / her hand, the entire movable guide member 25 rotates around the support shaft 28 to the above-described open position. This operation of opening the movable guide member 25 is performed against the biasing force M due to the elasticity of the tension spring 29. However, the operation of pulling the handle 17 is not so heavy. This is because the handle 17 is at a position far from the support shaft 28 that is the center of rotation as described above, and is an easy position as a moment of force. In addition, since the handle 17 is located at the end on the near side in the depth direction of the image forming apparatus 1, it can be easily picked by the operator.

  Next, a configuration in which the movable guide member 25 is also opened in conjunction with opening of the open / close door 2 will be described. In the case of this configuration, the open / close door 2 and the movable guide member 25 are connected by a connecting member 16 shown in FIG. However, in FIG. 8, the door 2 has not been opened yet. The connecting member 16 in FIG. 8 is a hollow cylindrical member. The right end in FIG. 8 of the connecting member 16 is attached to a block 14 provided on the open / close door 2. The block 14 is fixed to the opening / closing door 2. The opening / closing door 2 and the movable guide member 25 are connected to each other by the connecting member 16 at an end on the near side in the depth direction of the image forming apparatus 1. That is, it is the same width direction position as the handle 17 in the example shown in FIG.

  A compression spring 15 is provided inside the connecting member 16. The left end in FIG. 8 of the compression spring 15 is attached to the left end in FIG. The connecting member 16 has a partially cleaved shape. As a result, the right end of the compression spring 15 in FIG. 8 pushes the movable guide member 25 to the right. The force by which the compression spring 15 pushes the movable guide member 25 acts in a direction to urge the movable guide member 25 toward the open position. Therefore, this force is opposite to the biasing force M of the pulling spring 29 described above with respect to rotating the movable guide member 25. However, in the state of FIG. 8, the biasing force M of the tension spring 29 is superior to the pressing force of the compression spring 15. This is because the compression spring 15 is in a longer state as it is almost closer to its free length, and only a weak pressing force is generated. Therefore, in this state, the movable guide member 25 is maintained in a closed state.

  When the door 2 is opened, the state shown in FIG. 9 is obtained. In the state of FIG. 9, the wall surface member 21 and the block 14 are moved rightward as compared with the state of FIG. 8. This is because the opening / closing door 2 is opened. Along with this, the connecting member 16 is also pulled to the right by being pulled by the block 14. On the other hand, the transport roller 23 and the support shaft 28 in FIGS. 8 and 9 are at the same position. This is because these positions are fixed with respect to the main body of the image forming apparatus 1. In addition, arrangement | positioning of things other than the connection member 16 and the compression spring 15 in FIG. 9 is the same as the arrangement | positioning in FIG.

  Accordingly, the movable guide member 25 in FIG. 9 is in a position rotated slightly clockwise with respect to the state in FIG. Further, the compression spring 15 in FIG. 9 is in a more compressed state than the state in FIG. This is a state in which the movable guide member 25 is in the open position in conjunction with the opening / closing door 2 being opened. The compression spring 15 in FIG. 9 pushes the movable guide member 25 with a stronger urging force N in the right direction in the drawing as compared with the state in FIG. Therefore, in the state of FIG. 9, the urging force N of the compression spring 15 and the urging force M of the tension spring 29 are balanced with respect to the rotation of the movable guide member 25. In the state of FIG. 9, the movable guide member 25 is thus maintained in the open position. If the open / close door 2 is closed from this state, the wall surface member 21 returns to its original position and returns to the state of FIG. 8 as a whole.

  Here, how to apply force to the movable guide member 25 in the open state will be described. FIG. 10 is a plan view of the movable guide member 25 in the open position and the surrounding area when viewed from above. FIG. 10 is a redraw of the one shown in FIG. 5 with the movable guide member 25 in the open position (see FIG. 9). Accordingly, FIG. 10 differs from FIG. 5 in the following two points. First, there is a gap P between the contact portion 19 and the contact portion 24 on both the left and right sides. Second, the second portion 27 of the movable guide member 25 is hardly visible. The latter is because the second portion 27 is substantially vertical in FIG. Note that what is shown in FIG. 10 is the same whether the movable guide member 25 is the manual method (FIG. 7) or the interlocking method (FIGS. 8 and 9).

  Three forces are applied to the movable guide member 25 in the open position shown in FIG. First, the urging force M (29A) by the tension spring 29A. Second, it is the urging force M (29B) by the tension spring 29B. Third, the urging force N by the compression spring 15. The first urging force M (29A) and the second urging force M (29B) work in a direction to move the movable guide member 25 to the transport position, and are indicated by an upward arrow in FIG. On the other hand, the third urging force N works in a direction to move the movable guide member 25 to the open position, and is indicated by a downward arrow in FIG. In the open state of FIG. 10, the sum of the urging force M (29A) and the urging force M (29B) is balanced with the urging force N as a moment of force.

  In this state, the urging force M (29A) and the urging force M (29B), which are upward forces in FIG. 10, are applied to the left and right ends of the movable guide member 25 in a distributed manner. On the other hand, the urging force N which is a downward force in FIG. 10 is concentrated and applied to the position of the left end in FIG. For this reason, the movable guide member 25 in the open position shown in FIG. 10 is in a state in which a torsional stress to twist counterclockwise in FIG.

  Therefore, when the movable guide member 25 is in the open position for a long time (regardless of continuous or cumulative), distortion due to the torsional stress occurs. In a state where permanent deformation due to this distortion has occurred, the gap P between the contact portion 19 and the contact portion 24 in FIG. Of course, the gap P on the left side in FIG. 10, which is the end on the side where the urging force N acts, is larger than the gap P on the right side.

  In such a state where the movable guide member 25 is distorted, the following situation can be considered. That is, the position accuracy when the movable guide member 25 is returned from the open position to the transport position is deteriorated. This is because, even if the right contact portion 19B and the contact portion 24B, which are the narrow gap P in FIG. 10, are contacted with each other, as such, as shown in FIG. This is because the gap Q remains between the contact portion 24B. In this case, the sheet passing path F in FIG. 2 is wider than the original width. For this reason, the position of the sheet in the sheet passing path F and the subsequent sheet passing path G deviates from the assumed range, and the probability that the subsequent timing roller 34 fails to catch the sheet increases. In contrast, the sheet passing path H in FIG. 2 is narrower than expected. For this reason, paper feeding from the paper passing path H becomes difficult.

  However, in the image forming apparatus 1 according to the present embodiment, the above-described adverse effects do not occur even when the movable guide member 25 is distorted and deformed. This is due to the difference in characteristics between the tension spring 29A and the tension spring 29B described above. Specifically, the spring constant is different between the tension spring 29A and the tension spring 29B, and the tension spring 29A is stronger than the tension spring 29B. For this reason, the former is stronger in the urging force M (29A) and the urging force M (29B) shown in FIG.

  Therefore, in the image forming apparatus 1 according to the present embodiment, even when the movable guide member 25 is distorted as described above, both the left and right contact portions 19 and 24 are in the transport position. Further, the state of FIG. The urging force M (29A) in FIG. 10 causes the movable guide member 25, which has already been deformed due to distortion, to deform in the reverse direction so that the contact portion 19A on the left side in the width direction contacts the contact portion 24A. Because it is so powerful. Further, the strong biasing force M (29A) of the tension spring 29A also has an effect of correcting the distortion to some extent while the movable guide member 25 is at the transport position. For this reason, the progress of the deformation due to the distortion of the movable guide member 25 due to durable use is slow. For this reason, in the image forming apparatus 1 of this embodiment, the high positional accuracy of the movable guide member 25 in the state of the transport position is maintained over a long use period.

  As described above in detail, according to the present embodiment, in the sheet conveying unit 20 of the image forming apparatus 1, the opening / closing door 2 is opened and a part of the sheet passing path is opened. The downstream movable guide member 25 can also be set to the open position. As a result, the paper jam processing can be easily performed. Here, the force for moving the movable guide member 25 to the open position is at the front end of the movable guide member 25 in the width direction, and the movable guide member 25 can be distorted. However, the tension springs 29 for urging the movable guide member 25 toward the transport position are provided at both left and right ends, and the tension spring 29A on the front side is made stronger. As a result, even when the movable guide member 25 is distorted, the positional accuracy of the movable guide member 25 at the transport position is maintained. In this way, the paper transport unit 20 and the image forming apparatus 1 are realized in which the positional accuracy of the movable guide member 25 during paper transport is maintained high even during durable use.

  Note that this embodiment is merely an example, and does not limit the present invention. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof. For example, in the above-described embodiment, the tension spring 29 is used as the biasing member that biases the movable guide member 25 toward the transport position, but it may be a compression spring or another type of spring such as a leaf spring. Further, the compression spring 15 in the case of the interlocking method with the opening and closing of the door may be another type of spring.

  In the embodiment, the image forming apparatus 1 that is a device on which the paper transport unit 20 is mounted is a printer. However, the present invention is not limited to this, and a copy machine may be used, or a function that transmits and receives a print job via a public line may be used. Further, in the case of a copying machine or the like, the present invention may be applied to a transporting portion of a document in a reading unit in addition to a transporting region of a printing paper to an image forming unit. Therefore, the mounted device may be a scanner. Also, in the case of an image forming apparatus, the format may be anything such as a monochrome machine, a color machine, a double-sided machine, a single-sided machine, or a liquid coloring material may be used instead of toner.

1 Image forming apparatus 10 Paper storage unit (paper source)
16 Connecting member 17 Handle 20 Paper conveying portion 21 Wall surface member (path component member)
25 Movable guide member 29A Pull spring (first urging member)
29B Pull spring (second biasing member)
30 Image forming unit (paper source)
F, G paper path

Claims (4)

In a paper transport device that transports paper from a paper source to a paper destination via a paper path,
A path component that covers one side of the paper path and is retractable;
The paper passing path is located on the same side as the path constituent member and on the upstream side of the path constituent member in the paper transport direction. Ri movable der between away the open position from the path, the operation at the time of moving towards from the transport position to the open position, the movable guide member Ru receiving at one end side in the width direction of the sheet to be conveyed ,
A first urging member and a second urging member that urge the movable guide member toward the transport position;
It said first biasing member is placed on one end side in the width direction,
Said second biasing member is disposed on the other end side in the width direction,
The paper conveying apparatus according to claim 1, wherein a biasing force of the first biasing member is stronger than a biasing force of the second biasing member. The sheet conveying apparatus according to claim 1, wherein the movable guide member is
The handle of the order is moved to the by Ri before Symbol open position for manual operation of the steering author, the paper conveying apparatus according to claim Rukoto to Yusuke on one end side in the width direction. In the paper conveying apparatus of Claim 1 ,
The path constituent member is connected to the movable guide member, and when the path constituent member is retracted, the movable guide member is set to the open position, and the path constituent member is returned from the retracted state to the original position. Sometimes it has a connecting member with the movable guide member as the transport position ,
The connecting member is a sheet conveying apparatus characterized that you have been placed on the one side in the width direction. A paper feed unit;
An image forming unit;
An image forming apparatus comprising: the sheet conveying device according to claim 1, wherein the sheet conveying unit conveys a sheet from the sheet feeding unit to the image forming unit.

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