JP3067666B2 - Thin media transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a copying machine,
Thin media transport that transports thin media, such as manuscript paper, recording paper, cards, etc., used in facsimile machines, printing machines, readers, printers, multifunction devices, or certificate issuing machines Related to the device.

[0002]

2. Description of the Related Art Conventionally, in a sheet conveying apparatus as a kind of a thin medium conveying apparatus, a plurality of lower and upper rollers are mounted on upper and lower roller shafts extending in a direction intersecting the sheet conveying direction. The rollers are spaced apart in the cross direction. When the urging means urges the upper and lower rollers from above or below, the upper and lower rollers convey the sheet by rotating in a state of being pressed against the sheet. In this case, it is necessary that the upper and lower rollers equally hit each other in order to prevent the sheet from skewing. Therefore, it is necessary to prevent the upper and lower rollers from hitting each other by preventing the upper and lower roller shafts from bending or warping.

[0003]

In the conventional device, FIG.
As shown in (a), both upper and lower roller shafts Q
By increasing the thickness of Q1 and Q2 to increase rigidity, the upper and lower roller shafts Q1 and Q2 are prevented from being bent or warped. However, such a large-diameter shaft causes an increase in cost. Further, as shown in FIG. 8B, the lower roller Z2 is pressed against the upper roller Z1 by the urging means Z3.
By configuring them to be individually biased by
It is also possible to prevent the upper and lower rollers Z1, Z2 from hitting each other. However, as described above, the urging means Z3
The installation of the individual components causes an increase in cost. The present invention has been made in order to solve the above-described problems, and can prevent an increase in cost and, for example, when a thin medium such as paper is conveyed, a skew or a jam can be prevented. It is an object to provide a thin medium transport device.

[0004]

In order to achieve this object, according to the thin medium transport apparatus according to the first aspect, the upper and lower sides extended in a direction intersecting the transport direction of the thin medium. A plurality of upper and lower rollers arranged apart from each other in the cross direction on the roller shaft are pressed against each other by the urging force of the urging means, and are rotated by sandwiching the thin medium to form a thin film. In the thin medium transport device that transports a medium, the plurality of urging units are reduced in number as compared with the number of the upper or lower rollers, and are separated by a distance greater than a distance between the plurality of rollers separated in the cross direction. Installed, and
The urging means is configured to press the inner roller shaft located between the plurality of urging means more strongly than the outer roller shaft.

[0005] Accordingly, the number of the urging means can be reduced as compared with the number of the upper or lower rollers, and the cause of an increase in cost is reduced. Further, the plurality of urging means are installed at a distance larger than a separation distance between the plurality of rollers separated in a direction intersecting with the transport direction of the thin medium, and the urging means is disposed between the plurality of urging means. The inner roller shaft located at the position compared to the outer roller shaft is configured to be strongly pressed, so that an even pressing force can be generated between all the upper and lower rollers, and the upper and lower rollers can be generated. Prevents one-side contact between the lower rollers. In this case, the degree to which the urging means urges the inner roller shaft so as to strongly press the inner roller shaft as compared to the outer roller shaft is the distance between the plurality of urging means and the distance between the plurality of rollers. It is desirable to determine based on the relationship.

According to the second aspect of the present invention, the roller shaft of the upper and lower roller shafts which is directly urged by the urging means is connected to the roller shaft of the other roller. It is characterized in that it is easy to bend. Thereby, the pressing force of the urging means is reliably transmitted to the roller shaft, and the inner roller shaft located between the plurality of urging means is more reliably compared with the outer roller shaft not located between the plurality of urging means. Can be strongly pressed. Here, in order to make the roller shaft on the directly urged side more flexible than the roller axis on the other side, the roller axis on the directly urged side has a smaller diameter than the roller axis on the other side. However, such a small diameter shaft reduces the cost.

According to a third aspect of the present invention, the urging means presses at least two positions of the inner roller shaft and the outer roller shaft. And an outer urging portion, wherein the urging force of the inner urging portion is set to be larger than the urging force of the outer urging portion. Thereby, the inner urging portion
Since the roller shaft is strongly pressed against the outer urging portion, even if the number of urging means is smaller than that of the upper or lower roller, an equal pressing force is applied between all upper and lower rollers. Can be generated, and the upper roller and the lower roller can be reliably prevented from hitting each other. In this case, the urging force of the inner urging portion is set to be larger than the urging force of the outer urging portion, and the urging means presses the inner roller shaft more strongly than the outer roller shaft. It is desirable that the degree of urging be determined based on the relationship between the separation distance between the plurality of urging means and the separation distance between the plurality of rollers.

Further, according to the thin medium transport device of the present invention, the urging means includes a leaf spring, and the leaf spring width of the inner urging portion is set to be equal to the leaf spring of the outer urging portion. It is characterized by being larger than the width. Thus, the biasing means has a simple configuration in which the leaf spring width of the inner biasing portion is larger than the leaf spring width of the outer biasing portion, thereby providing the inner biasing portion and the outer biasing portion. The portion can press the inner roller shaft more strongly than the outer roller shaft, and easily and reliably prevent the upper and lower rollers from hitting each other. In this case, the width of the leaf spring of the inner urging portion is made larger than the width of the leaf spring of the outer urging portion, and the urging means presses the inner roller shaft more strongly than the outer roller shaft. It is desirable that the degree of urging be determined based on the relationship between the separation distance between the plurality of urging means and the separation distance between the plurality of rollers.

According to a fifth aspect of the present invention, the urging means includes a cantilever spring supported by a supporting member, and the inner urging portion supports the cantilever spring. A position is closer to the roller shaft than a position where the outer biasing portion supports the cantilever spring. Accordingly, by adopting a simple configuration in which the support position of the cantilever spring of the inner urging unit is closer to the roller shaft than the support position of the cantilever spring of the outer urging unit, the inner urging unit and the outer urging unit The biasing portion can press the inner roller shaft more strongly than the outer roller shaft, and easily and reliably prevent the upper and lower rollers from hitting each other. In this case, the supporting position of the cantilever spring of the inner urging portion is closer to the roller shaft than the supporting position of the cantilever spring of the outer urging portion, and the urging means compares the inner roller shaft with its outer roller shaft. Therefore, the degree of urging to strongly press the distance between the plurality of urging means,
It is desirable to determine the distance based on the relationship with the separation distance between the plurality of rollers.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a thin-medium conveying apparatus according to the present invention. The multi-function device refers to a device having multi-purpose functions such as a copying function, an answering machine function, a telephone function, a facsimile function, a reading function, and a printing function, but does not necessarily have all of these functions. It is not necessary, and may have other functions. However, the thin medium transport device according to the present invention,
There is no problem in applying the present invention to a copying machine, a facsimile machine, a read-only device, etc. other than the multifunction device.

FIG. 1 is an external perspective view of a multifunction device according to the present embodiment. In FIG. 1, a multifunction device 1 has a device main body 2, and an operation panel unit 5 is provided on an upper surface of the device main body 2. A liquid crystal display 6 as a display device is provided at a rear left position of the operation panel unit 5.

Specifically, a dial button 7 for dial input is arranged on the left side of the operation panel unit 5, and the dial button 7 is provided in addition to the numerical buttons "1" to "0". , An asterisk button, a sharp button, and the like. Further, on the right side of the operation panel unit 5, a stop key 8 for stopping the operation, a start key 9 for starting the operation, and the apparatus are used as a color copier from the front position to the rear position. Key 10 for color copy operation for
A color printer operation key 11 for using the apparatus as a color printer and an answering machine function key 12 for using the apparatus as an answering machine are provided. In the center of the operation panel unit 5, a one-touch dial key 1 for simplifying dial operation is provided.
3. A facsimile operation key 14 for using the apparatus as a facsimile is provided. Thereby,
The user can use these keys 7, 8, 9, 10, 11, 12, 1
The device can function as a multifunction device by appropriately operating the devices 3 and 14.

A document stack section 15 is provided at the rear position of the operation panel unit 5 for stacking documents to be read from the operation panel unit 5 in a stacked state. The paper feed unit 16 is provided to stack the recording papers in a stacked state. A document stacker 17 that stacks the read documents in a stacked state is provided at a position on the front side of the operation panel unit 5.
On the lower side of 7, there is provided a recorded paper stack 18 for stacking the recorded paper in a stacked state.

The document stack section 15 and the document stacker 1
The document conveyed between the document 7 and 7 is, as shown in FIG.
Inside the main body 2 of the multifunction device 1,
That is, the guide passage 19 on the lower side of the operation panel unit 5
Is transported along. Specifically, below the operation panel unit 5, a document separation roller 20 and a separation piece 21 that is in contact with the document separation roller 20 are disposed along the guide path 19. A pair of upper and lower guide rollers 22 is disposed downstream of the document separation roller 20, and a pair of upper and lower guide rollers 23 is disposed downstream of the document stacker 17. Has been established. As a result, the documents stacked in the document stacking section 15 are separated one by one by the document separating roller 20 and the separating piece 21, and are conveyed toward the downstream side while being tensioned by the guide rollers 22 and 23. You. Then, the document conveyed toward the downstream side is read by the reading device 24 on the front side inside the apparatus main body 2 in a manner described later.

A printing mechanism IK is provided behind the reading device 24 inside the apparatus main body 2. The printing mechanism IK is for recording a color image on the sheet surface conveyed from the sheet feeding section 16. Inkjet head ID. The printing mechanism IK is a so-called serial printing type, and can record a color image on a sheet surface in a serial manner. In other words, the inkjet head ID prints one line of color image on the paper surface while moving in the left-right direction of the apparatus main body 2 and, when printing of one line of color image is completed, transports the next one line. , So that the one-line color image can be recorded again. Thereby, the paper feed unit 16
The unrecorded recording paper stacked in step (1) is conveyed one by one and recorded by the printing mechanism IK. When the recording of the color image of all lines on the paper is completed, the recorded paper is stored in the recorded paper stack 18. It will be transported and stacked. However, the printing mechanism I of another embodiment
K is a so-called line printing type, and for example, a monochromatic image may be recorded on the paper surface.

A reading position 25 is set between the guide rollers 22 and 23. At this reading position 25, a reading device 24 as a photoelectric conversion element can read a document. The reading device 24 is disposed below the reading position 25 inside the multifunction device 1. Specifically, the reading device 24 is provided with a lamp L1 as a light source below the reading position 25, L1 irradiates the document at the reading position 25. Also, this reading position 2
A reflection mirror 26 is provided at a position directly below 5, and light reflected by the reflection mirror 26 is guided to a CCD device 28 via an optical system 27 including a plurality of reflection mirrors and the like.

Accordingly, the document conveyed along the guide path 19 is irradiated at the reading position 25 by the lamp L1,
The light reflected by the original is reflected by a reflection mirror 26 and an optical system 27.
, A C disposed on the upper front side inside the apparatus main body 2
It is guided to the CD device 28, that is, the CCD 29 on the CCD substrate 30. The reason why the substrate 30 on which the CCD 29 is mounted is disposed above the apparatus main body 2 is that the reading device 24
This is because the (CCD device 28) is disposed on the upper side, so that the handling of the original for reading is simplified.

Next, a description will be given of a guide roller 23 which embodies a thin medium transport device according to the present invention. Guide roller 2
3 includes upper and lower roller portions 23a and 23b as shown in FIGS.
a and 23b are upper and lower roller shafts J1 and J2 extending in a direction intersecting the conveying direction of the original as a thin medium.
And a plurality of upper and lower rollers R spaced apart in the cross direction.
1, R2 are arranged. The plurality of upper and lower rollers R1 and R2 can convey the document by rotating while sandwiching the document in a state where they are pressed against each other by the urging force of the urging means K1. In this case, the upper roller R1 is fixed to the upper roller portion 23a, while the lower roller R2 is rotatably attached to the lower roller portion 23b.

Specifically, the upper and lower roller shafts J1,
J2 is installed between the support plates S1 and S2 on both sides,
A plurality (three) of upper rollers R1 are fixed to the upper roller shaft J1 at intervals of a distance D1 (see FIG. 3) in a direction intersecting with the document conveyance direction, and similarly to the lower roller shaft J2. A plurality (three) of lower rollers R2 are rotatably supported with respect to the lower roller shaft J2 at intervals of a distance D1 (see FIG. 3). The support plate S on one side of the upper roller shaft J1
2, a driving roller R3 is provided. The driving roller R3 receives the rotation of a driving motor (not shown), and rotates integrally with the upper roller shaft J1. The lower roller R2 pressed against the roller R1 can also rotate and convey the document. However, the number of the upper and lower rollers R1 and R2 is not necessarily three, and may be four or more, for example. Also,
The upper and lower rollers R1, R2 do not necessarily have to have the same shape, and may be mutually deformed as needed, for example, by changing the diameter. And the urging means K1 is 3
The upper and lower rollers R1 and R2 are disposed so as to face roller pairs at both ends, and bias the lower roller shaft J2.

In this embodiment, the lower roller shaft J2 of the upper and lower roller shafts J1 and J2, which is directly urged by the urging means K1, is connected to the upper roller shaft J1 of the other. It is easier to bend. Specifically, it is desirable that the lower roller shaft J2 has a smaller diameter, for example, about half the diameter of the other upper roller shaft J1. Rigidity is reduced and bending is easy, and cost is reduced. However, for example, by changing the material of the lower roller shaft J2, the lower roller shaft J2 may be more flexible than the other upper roller shaft J1. If necessary, the roller shaft directly urged by the urging means K1 may be changed to the upper roller shaft J1.

The urging means K1 can press the plurality of upper and lower rollers R1, R2 against each other in the following manner. That is, the urging means K1 reduces the number of the upper or lower rollers R1 and R2 (three in the present embodiment) (two in the present embodiment), and in the cross direction. The rollers R1 and R2 are spaced apart from each other (distance D1 in this embodiment) (the distance D2 in this embodiment), and the urging means K1 is provided with the plurality of rollers R1 and R2. The inner roller shaft J2a located between the urging means K1 is pressed more strongly than the outer roller shaft J2b not located between the urging means K1. Incidentally, the urging means K1 connects the inner roller shaft J2a to the outer roller shaft J2a.
b, the degree of urging so as to press strongly is the distance D2 between the plurality of urging means K1 and the number of rollers R
1, it is desirable to determine based on the relationship with the separation distance D1 between R2 and the like.

More specifically, the urging means K1 includes, for example, a cantilever spring (see FIG. 6) in which one end side (base Bd) of the leaf spring B1 shown in FIG. 5 is supported by a support base K2. I have. The cantilever spring supported by the support base K2 is
An inner urging portion Ba and an outer urging portion Bc for pressing the inner roller shaft J2a and the outer roller shaft J2b of the lower roller R2 at at least two positions are provided. The urging force is set to be larger than the urging force of the outer urging portion Bc. In this case, the urging force of the inner urging portion Ba is set to be larger than the urging force of the outer urging portion Bc, and the urging means K1 presses the inner roller shaft J2a more strongly than the outer roller shaft J2b. It is preferable that the degree of biasing is determined based on the relationship between the distance D2 between the plurality of biasing means K1 and the distance D1 between the plurality of lower rollers R2. As a result, the lower roller R2 in the middle of the lower rollers R2 is the lower roller R2 on both outer sides.
With the same pressure as described above, the upper roller R1 is pressed.

In the case of this embodiment, as shown in FIG. 5, the leaf spring B1 presses the outside and the inside of the lower roller R2 from below, so that it has a substantially U-shape in plan view. Projections protruding forward from the base Bd constitute an inner urging portion Ba and an outer urging portion Bc. This is because the leaf spring B1 is connected to the lower roller shaft J such that the inner urging portion Ba and the outer urging portion Bc sandwich the outer and inner sides of the lower roller R2.
This is for energizing 2. However, the shape of the leaf spring B1 is not necessarily limited to this mode, and various changes can be made as necessary. If the necessity is poor, for example, the inner urging portion Ba and the outer urging portion Ba There is no need to provide the portion Bc, and there may be three or more biasing positions.

Next, a structure in which the leaf spring B1 is supported by the support K2 will be described. As shown in FIG. 6, the support base K2 is formed by cutting the upper wall and the upright wall K6 on the lower roller shaft J2 side of the support base K2 and opening the opening K3 in which the leaf spring B1 can be inserted into the lower roller shaft J2 side. Is provided.
Accordingly, when the base Bd of the leaf spring B1 is inserted into the opening K3, the leaf spring B1 moves to the upper inner side surface K4 of the support base K2 and the top of the upright wall K6 of the support base K2 (hereinafter referred to as a support position X1). Is supported in contact with both. Further, a projection K5 is provided on the rear side of the upright wall portion K6 of the support base K2, and a hole B provided on the base Bd shown in FIG.
3, the projection K5 is stored, and the leaf spring B1 is positioned with respect to the support base K2.

A projection P1 shown in FIGS. 3, 4, and 6 is provided on the lower roller shaft J2 side of the support base K2. Top of this projection P1 (hereinafter referred to as support position X2)
By contacting the lower surface of the inner urging portion Ba of the leaf spring B1, the support position (support position X2) of the cantilever spring of the inner urging portion Ba is supported by the cantilever spring of the outer urging portion Bc. It is configured to be closer to the roller shaft J2 than the position (support position X1). In this case, the closer the support position of the leaf spring B1 is to the roller shaft J2 side, the more the leaf spring B1 is supported.
The biasing force of 1 increases. In addition, the support position X2 of the cantilever spring of the inner urging portion Ba is closer to the roller shaft J2 than the support position X1 of the cantilever spring of the outer urging portion Bc, and the urging means K1 moves the inner roller shaft J2a. , Its outer roller shaft J
2b, the degree of urging so as to press strongly is determined based on the relationship between the separation distance D2 of the plurality of urging means K1 and the separation distance D1 between the plurality of lower rollers R2, and the like. Good. Thereby, the inner urging portion Ba and the outer urging portion Bc can press the roller shaft J2a inside the lower roller R2 more strongly than the outer roller shaft J2b.
A pressing force can also be applied from the lower roller R2 toward the upper roller R1 to the center roller pair that is not opposed to 1. Therefore, even if the urging means is not provided for each roller pair, a uniform pressing force can be generated between the three upper and lower rollers R1 and R2. As a result, it is possible to easily and surely prevent the upper and lower rollers R1 and R2 from hitting each other. Also, the lower roller shaft J2
Is configured to be easily bent, so that the pressing force of the urging means K1 is reliably transmitted, and the center upper and lower rollers R
1, an appropriate pressing force can be generated between R2.

Thus, the number of biasing means K1 (two)
Is the number of the upper or lower rollers R1, R2 (3
), The inner urging portion B of the urging means K1
By setting the urging force of “a” larger than the urging force of the outer urging portion Bc, the urging force acts on the upper and lower rollers R1 and R2 that are not opposed to the urging means K1. All upper and lower rollers R
An even pressing force can be generated between the first and second rollers R1 and R2, and the upper and lower rollers R1 and R2 can be prevented from hitting each other. Further, since the number of the urging means K1 can be reduced, the cost can be reduced.

As described in detail above, according to the paper transport apparatus of this embodiment, the upper and lower roller shafts J1 and J2 extending in the direction intersecting the paper transport direction are spaced apart in the cross direction. A plurality of upper and lower rollers R1,
In a sheet transport apparatus that transports a sheet by rotating across the sheet in a state where R2 is pressed against each other by the biasing force of the biasing unit K1, a plurality of the biasing units K1
Is set to be smaller than the number of the upper or lower rollers R1 and R2, and is set to be larger than the separation distance D1 between the plurality of rollers R1 and R2 separated in the cross direction, and the urging means K1 Is configured to press the inner roller shaft J2a located between the plurality of urging means K1 more strongly than the outer roller shaft J2b.

Thus, the plurality of urging means K1 are
The number of the upper and lower rollers R1 and R2 can be reduced as compared with the number of the upper and lower rollers R1 and R2, and the cause of an increase in cost is reduced. Further, a plurality of the urging means K1 are separated from each other by a plurality of rollers R1, R which are spaced apart in a direction intersecting the sheet conveying direction.
2 and a plurality of inner roller shafts J2 positioned between the plurality of urging means K1.
a, the urging means K1 is configured to press strongly compared to the outer roller shaft J2b. Therefore, even if the urging means K1 for the number of the upper and lower rollers R1 and R2 are not provided, A uniform pressing force can be generated between the upper and lower rollers R1 and R2, thereby preventing the upper and lower rollers R1 and R2 from hitting each other.

As another embodiment, for example, FIG.
May be provided. That is, the leaf spring width Ba1 of the inner urging portion Ba is changed to the outer urging portion B.
c is larger than the leaf spring width Bc1. Accordingly, the biasing unit K1 can press the inner roller shaft J2a located between the plurality of biasing units K1 more strongly than the outer roller shaft J2b not located between the biasing units K1. it can. In this case, the leaf spring width Ba1 of the inner urging portion Ba is made larger than the leaf spring width Bc1 of the outer urging portion Bc, and the urging means K1 compares the inner roller shaft J2a with the outer roller shaft J2b. , The degree of urging to press strongly,
It is preferable to determine the distance based on the relationship between the distance D2 between the plurality of biasing means K1 and the distance D1 between the rollers R1 and R2. However, other methods may be adopted as long as the biasing force of the inner biasing portion Ba can be set to be larger than the biasing force of the outer biasing portion Bc. For example, the material of the inner biasing portion Ba of the leaf spring B1 may be used. May be different from the material of the outer urging portion Bc, or the thickness of the inner urging portion Ba may be thicker than the outer urging portion Bc.

Although a multifunction device has been described as an embodiment of the present invention, the thin medium transport apparatus of the present invention is not necessarily limited to this embodiment. Machine, facsimile machine, printing machine, printer-dedicated machine, and the like. The thin medium may be any thin medium such as a card, a document or a ticket.

[0031]

According to the thin medium transport apparatus of the first aspect, the number of the urging means is reduced as compared with the number of the upper or lower rollers, thereby causing an increase in cost. As the number of the urging means decreases, the plurality of urging means are installed at a distance larger than the separation distance between the plurality of rollers separated in a direction intersecting the transport direction of the thin medium, and are located between the plurality of urging means. By configuring the biasing means to strongly press the inner roller shaft compared to the outer roller shaft, it is possible to generate a uniform pressing force between all the upper and lower rollers, In addition, it is possible to prevent the lower rollers from hitting each other. If three pairs of upper and lower rollers are provided, and only two pairs of both ends of the three pairs are associated with the urging means, the urging means is a roller shaft located between the central roller pair. That is, since the inner roller shaft is configured to be pressed more strongly than the outer roller shaft, even for the center roller pair that does not correspond to the urging means, the distance between the upper roller and the lower roller is To generate a pressing force,
Even if the urging means is not provided for each roller pair, a uniform pressing force can be generated between the three pairs of upper and lower rollers. Thus, for example, when a thin medium such as paper is conveyed, skewing or the like is less likely to occur.

According to the thin medium transport device of the present invention, the roller shaft of the upper and lower roller shafts which is directly urged by the urging means is connected to the roller shaft of the other. Since the deflection is made easier, the pressing by the urging means is transmitted to the roller shaft reliably, and the inner roller shaft located between the plurality of urging means is compared with the outer roller shaft which is not located between the urging means. It can be surely pressed strongly.

According to the thin medium transport device of the present invention, the urging means presses at least two positions of the inner roller shaft and the outer roller shaft. And an outer urging portion, and the urging force of the inner urging portion is set to be larger than the urging force of the outer urging portion. At least, since the inner urging portion and the outer urging portion press the inner roller shaft more strongly than the outer roller shaft, an even pressing force can be generated between all the upper and lower rollers. As a result, it is possible to reliably prevent the upper and lower rollers from hitting each other. Therefore, for example, when a thin medium such as paper is conveyed, skewing or the like is less likely to occur, and stable conveyance is possible even for small-sized paper.

According to a fourth aspect of the present invention, the urging means includes a leaf spring, and the leaf spring width of the inner urging portion is set to be equal to that of the outer urging portion. Since the width is larger than the width, the urging means has a simple configuration in which the width of the leaf spring of the inner urging portion is larger than the width of the leaf spring of the outer urging portion. The part can press the inner roller shaft more strongly than the outer roller shaft.

According to a fifth aspect of the present invention, the urging means includes a cantilever spring supported by a supporting member, and supports the cantilever spring of the inner urging portion. Since the position is closer to the roller shaft than the supporting position of the cantilever spring of the outer urging portion, the supporting position of the cantilever spring of the inner urging portion is the supporting position of the cantilever spring of the outer urging portion. With a simple configuration closer to the roller shaft, the inner urging portion and the outer urging portion can press the inner roller shaft more strongly than the outer roller shaft.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the appearance of a multifunction device according to an embodiment of the present invention.

FIG. 2 is a partial side view schematically showing the inside of the multifunction device according to the embodiment.

FIG. 3 is a plan view showing a guide roller of the embodiment.

FIG. 4 is a front view showing a guide roller of the embodiment.

FIG. 5 is a perspective view showing a leaf spring material of the embodiment.

FIG. 6 is a partially longitudinal sectional view showing, in an enlarged manner, a state in which the leaf spring material of this embodiment urges the roller shaft upward.

FIG. 7 is a perspective view showing a leaf spring material on one side according to another embodiment.

FIG. 8 is a front view showing a conventional paper transport device.

[Explanation of symbols]

 23 Guide roller R1 Upper roller R2 Lower roller J1 Upper roller shaft J2 Lower roller shaft J2a Inner roller shaft J2b Outer roller shaft Ba Inner urging portion Bc Outer urging portion B1 Leaf spring Ba1, Bc1 Leaf spring width P1 Support material K1 Biasing means D1, D2 Distance X1, X2 Support position

Claims (5)

(57) [Claims] A plurality of upper and lower rollers spaced apart in a cross direction are provided on upper and lower roller shafts extending in a direction intersecting with a conveying direction of a thin medium. In a thin medium transport device that transports a thin medium by rotating the thin medium in a state of being pressed against each other by an urging force, a plurality of the urging means are disposed on the upper or lower roller. The number of rollers is set smaller than the number of the rollers, and the distance between the rollers is set larger than the distance between the plurality of rollers separated in the cross direction. A thin medium transport device configured to be pressed more strongly than an outer roller shaft not located between a plurality of urging means. 2. The thin medium transport device according to claim 1, wherein a roller shaft of the upper and lower roller shafts directly urged by the urging means is compared with a roller shaft of the other roller shaft. A thin medium transport device characterized by easy bending. 3. The thin medium transporting device according to claim 1, wherein the urging means presses at least two positions of the inner roller shaft and the outer roller shaft, and an outer urging portion. A thin medium transport device comprising an urging unit, wherein the urging force of the inner urging unit is set to be larger than the urging force of the outer urging unit. 4. The thin medium transport device according to claim 3, wherein the urging means includes a leaf spring, and a leaf spring width of the inner urging portion is equal to a leaf spring width of the outer urging portion. A thin medium transport device characterized by being larger. 5. The thin medium transport device according to claim 3, wherein the urging means includes a cantilever spring supported by a support member, and a support position of the inner urging portion for the cantilever spring. Is located closer to the roller shaft than the support position of the cantilever spring of the outer urging portion.