JP3678820B2 - Paper transport device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a sheet conveying apparatus that is used in a facsimile, a printer, and the like and sequentially conveys a plurality of stacked sheets placed from a predetermined position.
[0002]
[Prior art]
  For example, FIG. 18 shows the document Ricoh Technical Report NO. 9 is a structural cross-sectional view of a conventional paper transport apparatus shown in 9 MAY 1983, in which 1 is a paper that is stacked and placed, and 12 is a transport direction of a paper placement table (not shown). Is a pressing plate having a fulcrum (not shown) on which the paper 1 is placed and rotated, and 6 is a pressing plate spring which is an urging means for rotating the pressing plate 12 upward. Reference numeral 7 denotes a transport roller for sequentially transporting the paper 1 that moves upward by the rotational movement of the presser plate 12 by the presser plate spring 6 from the uppermost paper 1a by rotating. , 8 is a separation plate that abuts on the conveyance rollers 7 and 8a and separates the sheets 1 and conveys them one by one by the conveyance rollers 7 when a plurality of sheets 1 are to be conveyed, 9 is the separation plate 8 A mount having a rotating fulcrum 9a is fixed, 10 by rotating moving the mount 9 upward, a mounting spring for pressing said transport roller 7 to the separation plate 8 at a constant pressure.
[0003]
  Next, the operation will be described with reference to FIG. When the conveyance roller 7 made of a soft rubber material rotates in the clockwise direction as shown in the drawing according to the conveyance start instruction, the uppermost sheet 1a of the stacked sheets 1 is pulled out by the frictional force of the conveyance roller 7. And reaches the 8a portion where the conveying roller 7 and the separation plate 8 come into contact with each other. The separation plate 8 is set so that the friction coefficient with respect to the paper 1 is smaller than the friction coefficient with respect to the paper of the transport roller 7 and is in contact with the peripheral surface of the transport roller 7 with a relatively small pressure. When reaching the 8a portion, the paper 1 pushes down the separation plate 8 by the paper thickness, and the frictional force of the transport roller 7 is larger than the frictional force of the separation plate 8, so the paper 1 continues to advance. Further, when the next sheet advances together with the uppermost sheet 1a depending on the degree of friction force between the sheets 1, as a first step, in the front portion 9b of the fixing mount 9 of the separation plate 8, The sheet 1 and the material of the front portion 9b of the mount 9 and the frictional force due to the entry angle of the sheet 1 try to prevent the second and subsequent sheets from advancing. If a plurality of sheets 1 cannot be blocked at this stage and further enters the 8a section, the frictional force between the sheet 1 and the separating plate 8 is greater than the frictional force between the sheets 1 and the entrance of the 8a section is at the conveying roller 7. Since the sheet 1a at the uppermost position is already sandwiched between the first and second sheets, the conveying force due to the frictional force of the peripheral surface of the conveying roller 7 is not transmitted to the second and subsequent sheets, and the forward movement is prevented and the uppermost position 1a is stopped. Only the sheet 1a moves forward while sliding on the second and subsequent sheets, and is discharged and conveyed from the pressing plate 3 to perform a predetermined sheet feeding.
[0004]
  FIGS. 19 to 23 are views showing a paper separating mechanism showing a conventional paper conveying device disclosed in, for example, Japanese Utility Model Publication No. 3-64953. In FIG. 19, 1 is a plurality of stacked sheets, 2 is a sheet mounting table on which a plurality of sheets 1 can be stacked, and 13 is a positioning of the leading ends of the plurality of sheets 1. A guide plate 14 serving as a positioning means is a multi-feed preventing conveyance means for conveying the paper 1 one by one, and is composed of a conveyance roller 15 that rotates in the conveyance direction and a separation roller 16 that rotates in the opposite conveyance direction. ing. Reference numeral 17 denotes a forward feed roller supported by an arm 19 swingable around a drive shaft 18 of the transport roller 15. This paper conveying apparatus is equipped with the following paper separating mechanism.
[0005]
  That is, as shown in FIGS. 19, 20, and 21, the sheet mounting table 2 has a groove at a position where the punch hole a comes when a plurality of sheets 1 having punch holes a are stacked and mounted. A concave portion 20 is formed. Above the recess 20, there is provided a pressing tool 22 that is driven by a solenoid 21 and strikes the punch hole portion a of the paper 1 a predetermined number of times prior to the start of conveyance of the paper 1 by the multifeed prevention conveyance means 14. . Reference numeral 23 denotes a return spring for the pressing tool 22.
[0006]
  Next, the operation of the sheet conveying apparatus having the configuration shown in FIG. 19 will be described. As shown in the drawing, when a copy start key (not shown) is pressed in a state where a plurality of sheets 1 having punch holes a formed therein are stacked and placed at a predetermined position on the sheet placing table 2, as shown in FIG. The solenoid 21 is energized a predetermined number of times, and the pressing tool 22 strikes the punch hole a portion of the paper 1 a predetermined number of times. Since the recess 20 is formed at the position immediately below the punch hole a portion in the paper mounting table 2, as shown in FIG. 22, the punch hole a portion is bent into the recess 20 and paper separation is performed. The close contact portion between the sheets 1 in the hole wall portion generated by making the punch hole a is unraveled. After the pressing tool 22 is lifted, the forward feed roller 17 falls on the paper 1 and starts conveyance, and the guide plate 13 serving as the positioning means falls down to enable the conveyance of the paper 1. Conveyance is performed by the multi-feed prevention conveying means 14 composed of the separation roller 16. In this case, since the contact portion between the sheets 1 is unraveled by the above-described sheet separating process, the feeding roller 15 and the separation roller 16 are surely prevented from being double-fed, and only the sheet 1 at the uppermost position is used. Is transported.
  FIG. 23 shows an example in which the same effect is obtained even if the vicinity of the punch hole a of the paper 1 is hit.
[0007]
[Problems to be solved by the invention]
  Since the conventional paper conveying apparatus is configured as described above, there are the following problems. That is, in a paper transport apparatus such as a facsimile, there are papers having different sizes, thicknesses, and paper qualities. Particularly, the thickness of the paper is 0.055.mmIn many cases, thin paper of a thickness is used. The paper conveyance device described in the prior art uses the relationship of μ1> μ2 as the separation force when the friction coefficient between the rubber of the conveyance roller and the paper is μ1, and the friction coefficient between the paper and the paper is μ2. It has separation means such as a separation plate and a separation roller for sending only the uppermost sheet 1 from two or more sheets placed, but when using such thin paper especially at high temperature and high humidity, The problem is that the moisture content of the paper is increased, the sheets are easily brought into close contact with each other by the pressing of the pressing plate, the contact force is greater than the separation force, and the sheets are conveyed in a state where two or more sheets are overlapped. There was a point.
  In addition, in the conventional example in which the paper is bent, it is necessary to add parts such as a pressing tool in order to bend the paper, which complicates the mechanism and control, and can only be applied to paper with punch holes. There wasn't.
  Further, in the case of the thin paper, the leading end portion of the paper is easily curled, and there are many cases in which the paper is caught in a linear gap generated between the components on the conveyance path of the paper conveyance device.
[0008]
  The present invention has been made to solve the above-described problems, and a sheet conveying apparatus capable of reliably separating and conveying a thin sheet even at high temperature and high humidity is obtained by a simple mechanism and control. For the purpose.
[0009]
[Means for Solving the Problems]
  According to the present invention, there is provided a paper transporting device comprising: a paper mounting table for stacking and mounting a plurality of inclined sheets; a transporting roller for transporting the paper; and a plurality of paper mounted on the paper mounting table. Hold the leading edge of the sheet in the conveyance direction, and place the leading edge on the conveyance roller.PressingPossible holding plate,The uppermost sheet of the plurality of sheets conveyed by the conveyance rollerA separation plate to be discharged and conveyed, and a position of the pressing plate that is in contact with the conveyance roller, facing the inner side from both ends of the conveyance roller;An adhesion reducing means comprising rib-shaped convex portions formed with slopes in the upstream and downstream direction of paper conveyance;And an urging means for urging the pressing plate against the conveying roller.
[0010]
  The paper conveying device of the present invention isA sheet mounting table for stacking and mounting a plurality of sheets disposed in an inclined manner, a transport roller for transporting the sheets, and a tip in the transport direction of the plurality of sheets mounted on the sheet mounting table A pressing plate capable of holding the portion and pressing the tip portion against the transport roller, a separation plate for discharging and transporting the uppermost sheet of the plurality of sheets transported by the transport roller, and the pressing plate A member separate from the pressing plate, which is disposed at a position in contact with the conveying roller and which is provided facing the inner side from both ends of the conveying roller, and is formed of a rib-shaped convex portion that forms a slope in the upstream and downstream directions of the sheet conveying. And an urging means for urging the pressing plate against the conveying roller..
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Reference example 1.
  Hereinafter, embodiments of the present invention will be described.Before describing, reference examples related to the present invention will be described.FIG. 1 is a cross-sectional view of the structure of a sheet conveying apparatus according to a reference example. Reference numeral 1 denotes a plurality of sheets, and reference numeral 2 denotes a sheet placing table on which the plurality of sheets 1 are stacked. The paper mounting table 2 is disposed to be inclined with respect to the horizontal plane. Reference numeral 3 denotes a front end portion of the paper 1 in the carrying direction, and the paper 1 is stacked and placed together with the paper placing table 2. The paper 1 has a rotating fulcrum 3 a and a bending portion 3 b, and the paper is placed on the carrying roller 7. 2 is a pressing plate having a notch portion 3c as a concave portion as a contact force relaxation means shown in FIG. A cam 4 is a means for locking the rotation operation of the pressing plate 3 having the fulcrum 4a. The cam 4 is brought into contact or non-contact with the bent portion 3b of the pressing plate 3 by rotating. Reference numeral 5 denotes a lower guide having a paper platen 2 and a guide plate for aligning and positioning the front ends of the papers 1 stacked and placed on the presser plate 3. When the papers 1 are transported by the transport rollers 7. It becomes the lower conveyance guide. Reference numeral 6 denotes a pressing plate spring which is an urging means for rotating the pressing plate 3 upward about the fulcrum 3a and presses the sheet 1 against the conveying roller 7, and 7 conveys the sheet 1 made of a soft rubber material. A conveying roller 8 for separating paper, a separating plate made of a rubber material having a predetermined coefficient of friction in contact with the conveying rollers 7 and 8a, and a mount 9 for fixing the separating plate 8 and having a fulcrum 9a; Is a mount spring which is an urging means for pressing the transport roller 7 and the separation plate 8 with a predetermined pressure by rotating the mount 9 upward.
[0012]
  Next, the operation will be described with reference to FIGS. To transport the paper 1, when a transport start button (not shown) is pressed, the rotation fulcrum 4a of the cam 4 is rotated 180 ° from the position of FIG. 1 by the power of the power source (not shown), as shown in FIG. Then, the cam 4 is released from the bent portion 3b of the pressing plate, and the locking is released. The pressing plate 3 is pulled upward by a pressing plate spring 6 and biased. At this time, the paper 1 placed on the paper placement table 2 and the pressing plate 3 moves upward along the guide plate portion of the lower guide 5, abuts against the conveying roller 7 with a predetermined pressure, and is pressed. Then, the uppermost sheet 1 a of the sheet 1 is pressed against the outer peripheral portion 7 a of the transport roller 7.
[0013]
  Next, as shown in FIG. 3, after the cam 4 has rotated 180 °, the conveyance roller 7 starts to rotate by the power of a power source (not shown) after the stabilization time of about 1 second has elapsed. The sheet 1a at the uppermost position of the sheet 1 pressed against the conveying roller 7 at the same time as the rotation is started has a higher friction coefficient than the sheet 1a at the uppermost position and the sheet 1b below the uppermost position. Since the coefficient of friction of the sheet 1a is set larger, the sheet 1a is discharged and conveyed from the sheet placing table 2 and the pressing plate 3 in the rotation direction of the conveying roller. Further, the second sheet 1b and subsequent sheets 1 are also conveyed in the same manner.
[0014]
  In this way, a plurality of sheets 1 stacked on the sheet placing table 2 and the pressing plate 3 are conveyed one by one in order from the top, and when the last sheet is conveyed (sheet sensor). ), The cam 4 is again rotated 180 ° from the position of FIG. 3 by the power of a power source (not shown), and the presser plate 3 is pushed down as shown in FIG. 1 to place the paper 1 on the paper placement table 2. Coplanar with the surface.
[0015]
  The operation of the notch 3c, which is a recess of the pressing plate 3, with respect to the paper 1 will be described with reference to the drawings. As shown in FIG. 4A, the sheet 1 stacked on the pressing plate 3 is applied with surface pressure at both ends of the notch 3 c by the transport roller 7, and the rubber transport roller 7. Since the portion to which the surface pressure is applied is slightly deformed into a concave shape, the stacked paper 1 is deformed into a wave shape. Therefore, an air layer is formed between the sheets of the sheet 1 in the recess 1c corresponding to the notch 3c of the pressing plate 3, and the adhesion between the sheets in this portion is reduced. In the conventional paper transport device, the presser plate 3 has no notch 3a, and the presser plate 3 and the transport roller 7 are in contact with the entire pressing surface via the paper 1, so that the adhesive force between the papers is the pressing force. Therefore, it may be difficult to separate and transport the paper 1. Further, since the sheet 1 is bent in a wave shape, each sheet is strengthened, and when the sheet 1 comes into contact with the separation plate 8, the leading end of the sheet 1 is surely brought into contact with the separation plate 8. Conveyance capacity is improved.
  In addition, it is better to chamfer the end surface of the notch 3c or provide a taper so that the notch 3c does not damage the paper 1 during conveyance.
  Further, the pressing operation of the pressing plate 3 to the conveying roller 7 is not limited to the rotational movement, but the separating roller that rotates in the direction opposite to the conveying roller is not the separating plate 8 as a means for separating and conveying the paper 1. It can be configured with. It is also possible to apply to other separating means, or to separate the separating means and the conveying means.
[0016]
  The process in which the sheet 1 is bent will be described in more detail with reference to FIG. Since the conveying roller 7 is formed of a material such as a soft rubber material, no surface pressure is applied by the pressing plate 3 of the conveying roller 7, that is, in a portion corresponding to the notch 3 c of the pressing plate, It tries to enter the notch 3c without causing any compression deformation. At this time, the shearing force by the pressing plate 3 acts on the conveying roller 7 at the boundary area with the surface pressure portion causing the compressive deformation of the conveying roller 7, and the conveying roller 7 is deformed as shown in FIG. 4B. . On the other hand, the sheet 1 between the transport roller 7 and the pressing plate 3 is slightly pushed out in the horizontal direction (a direction) perpendicular to the transport direction due to the deformation of the transport roller 7, so that it is curved as shown in FIG. Deforms into a wave or wave.
[0017]
Reference Example 2
  Reference example 1As in FIG. 1, the overall configuration of the sheet conveying apparatus is as shown in FIG.Reference example 1The difference is that, as shown in FIG. 5, not the notch portion 3 c but a concave-shaped throttle portion 3 d is provided in the pressing plate 3 as a recess serving as an adhesion reducing means.
[0018]
  Also,Reference example 2The behavior ofReference example 1It is the same.
[0019]
  Further, the action of the concave diaphragm portion 3d of the pressing plate 3 on the paper 1 is as follows.Reference example 16, as shown in FIG. 6, the sheet 1 stacked and placed on the pressing plate 3 is subjected to surface pressure by the conveying roller 7 at both ends of the concave throttle portion 3 d, and rubber is applied. Since the portion to which the surface pressure of the manufactured transport roller 7 is applied is slightly deformed into a concave shape, it is deformed into a wave shape. For this reason, an air layer is formed in the recess 1c between the sheets of the sheet 1, thereby reducing the adhesion between the sheets.Reference example 1When the chamfering process of the end surface is insufficient, the cutout portion 3c that is a concave portion of the paper 1 may be folded at the end surface portions at both ends.Reference example 2In the case of the concave-shaped diaphragm portion 3d, the end face is generally finished smoothly, so that folding of the paper can be prevented.
[0020]
Reference example 3.
  Reference example 1As in FIG. 1, the overall configuration of the sheet conveying apparatus is as shown in FIG.Reference example 17 is that the pressing plate 3 is provided with one or more rib-like convex portions 3e as convex portions, instead of the notched portions 3c as concave portions, as the adhesion reducing means, as shown in FIG. .
[0021]
  Also,Reference example 3The behavior ofReference example 1It is the same.
[0022]
  Further, the action of the rib-shaped convex portion 3e of the press plate 3 on the paper 1 is as follows. The paper 1 stacked and placed on the press plate 3 is moved by the conveying roller 7 as shown in FIG. Since the surface pressure is applied at the portion 3e, and the portion to which the surface pressure of the rubber transport roller 7 is applied is slightly deformed into a concave shape, it is deformed into a wave shape. For this reason, an air layer is formed in the recess 1c between the sheets of the sheet 1, thereby reducing the adhesion between the sheets. In the first embodiment or the second embodiment, the portion of the sheet 1 that is deformed in a wave shape is only the region of the cutout portion 3c or the concave-shaped throttle portion 3d, whereas in the third embodiment, as shown in FIG. In addition, the wavy deformation spreads to the outside of the rib-like convex portion, and the adhesion between the sheets can be further reduced.
[0023]
Reference Example 4
  Reference example 1As in FIG. 1, the overall configuration of the sheet conveying apparatus is as shown in FIG.Reference example 19 is different from the notch portion 3c that is a concave portion as an adhesion reducing means, as shown in FIG. 9, one or more rib-shaped convex portions 3f that are provided with a slope on the upstream side of the sheet conveyance. Is provided on the holding plate 3.
[0024]
  Also,Reference example 4The behavior ofReference example 1It is the same.
[0025]
  Further, the action of the rib-like convex portion 3f of the pressing plate 3 on the paper 1 is as shown in FIG.Reference example 3The same as above. However,Reference example 3Then, when the paper 1 is placed on the holding plate 3, the front end of the paper hits the end surface of the rib-like convex portion, which has become an obstacle on the conveyance of the paper.Reference example 4Then, a smooth sheet can be placed by providing a slope on the upstream side of the sheet conveyance of the rib-shaped convex portion.
[0026]
Embodiment1.
  Embodiments of the present invention will be described below. Reference Example 1 andSimilarly, the overall configuration of the sheet conveying apparatus is as shown in FIG.Reference example 1As shown in FIG. 10, the difference is that not only the notch portion 3c that is a concave portion but also one or more rib-like convex portions 3g provided with slopes on both the upstream and downstream sides of the paper conveyance as shown in FIG. This is provided on the plate 3.
[0027]
  Also,Embodiment 1The behavior ofReference example 1It is the same.
[0028]
  Further, the action of the rib-like convex portion 3g of the pressing plate 3 on the paper 1 is as shown in FIG.Reference example 3The same as above. Also,Reference example 4In this case, the conveyance roller is deformed into the shape as shown in FIG. 11A by the edge of the rib-shaped convex portion 3f on the downstream side of the sheet conveyance, so that the leading edge of the sheet is bent due to a sharp bend of the sheet. The embodiment1Then, as shown in FIG. 11B, the paper can be prevented from being bent sharply by providing a slope on the downstream side of the paper conveyance like the rib-shaped convex portion 3g.
[0029]
Embodiment2.
  Reference example 1As in FIG. 1, the overall configuration of the sheet conveying apparatus is as shown in FIG.Reference example 112 is that the pressing plate 3 is provided with one or more round convex portions 3h, not the concave portions 3c, which are concave portions, as the adhesion reducing means, as shown in FIG.
[0030]
  Also, the embodiment2The behavior ofReference example 1It is the same.
[0031]
  Further, the action of the round convex portion 3h of the pressing plate 3 on the paper 1 is as shown in FIG.Reference example 3The same as above. In addition, the round convex portion 3h is the embodiment1The same effect as the above can be obtained, and the formation of the convex portion is simple.
[0032]
Embodiment3.
  Reference example 1As in FIG. 1, the overall configuration of the sheet conveying apparatus is as shown in FIG.Reference example 1As shown in FIG. 13, the difference from the embodiment is not the notch portion 3 c that is a recess as the adhesion reducing means, but the embodiment.1, 2In other words, the convex plate 11 formed of a material different from the pressing plate is attached to the pressing plate 3.
[0033]
  Also, the embodiment3The behavior ofReference example 1It is the same.
[0034]
  Further, as shown in FIG. 14, the operation of the convex plate 11 attached to the press plate 3 on the paper 1 is such that the paper 1 stacked on the press plate 3 is placed on the convex plate 11 by the conveying roller 7. Since the surface pressure is applied at the convex portion 11a and the portion to which the surface pressure of the rubber transport roller 7 is applied is slightly deformed into a concave shape, it is deformed into a wave shape. For this reason, an air layer is formed in the recess 1c between the sheets of the sheet 1, thereby reducing the adhesion between the sheets. Furthermore, in the seventh embodiment, since the convex portion in contact with the conveying roller on the pressing plate 3 can be formed of a different material, it is possible to adjust the frictional force between the lowermost sheet and the convex plate 11, and Corresponding paper can be transported.
[0035]
Embodiment4.
  Reference example 1As in FIG. 1, the overall configuration of the sheet conveying apparatus is as shown in FIG.Reference example 1As shown in FIG. 13, the embodiment differs from the cutout portion 3c that is a concave portion as an adhesive force relaxation means, as a convex portion.1, 2The convex plate 11 formed of a material in which silicon rubber is mixed with cork is attached to the pressing plate 3.
[0036]
  Also, the embodiment4The behavior ofReference example 1It is the same.
[0037]
  Further, the operation of the convex plate 11 attached to the press plate 3 with respect to the paper 1 is shown in FIG.3The same as above. Furthermore, the embodiment4Then, since the convex part which contacts the conveyance roller on the pressing plate 3 is formed of a material close to the coefficient of friction of the sheet, it is possible to reliably convey the sheet. In particular, the lowermost sheet can be transported under the same conditions as other sheets.
[0038]
Embodiment5.
  Reference example 1As in FIG. 1, the overall configuration of the sheet conveying apparatus is as shown in FIG. However, as an example of forming as an adhesive force relaxation means, as a recessReference example 1Notch 3c orReference example 2Embodiment of the concave-shaped diaphragm portion 3d or convex portion1-4In some cases, any one of the convex portions is provided on the pressing plate 3.
  Further, as shown in FIG. 15, one or more rib-like convex portions 5 a are provided on the guide plate surface of the lower guide 5, and the convex portions are located at positions facing the convex portions on the sheet conveyance downstream end surface of the pressing plate 3. A notch 3i, which is a recess that loosely fits with 5a, is provided.
[0039]
  Also, the embodiment5The behavior ofReference example 1It is the same.
[0040]
  Further, the action of the notch portion, which is a concave portion provided in the holding plate 3 shown in FIG. 15, and the rib-like convex portion 5a provided on the guide plate surface of the lower guide 5 with respect to the paper 1 as shown in FIG. In order to prevent the sheet 1 from entering the gap between the pressing plate 3 and the lower guide 5 when the leading end is curled, it becomes impossible to convey the sheet 1 as shown in FIG. A convex portion 5a is provided, and the leading edge of the paper 1 is aligned at the end surface of the rib-shaped convex portion 5a and positioned. By adopting this configuration, there is no linear gap perpendicular to the conveyance direction of the sheet 1 on the conveyance path, and it is possible to prevent the sheet from entering the gap in any state of the rotation movement of the pressing plate 3. it can.
[0041]
The embodiment5Then, one or more rib-shaped convex portions 5a are provided on the lower guide 5 guide plate surface side, and a notch portion 3i which is a concave portion loosely fitted with the convex portion 5a is provided on the sheet conveying downstream end surface of the pressing plate 3. Contrary to this, one or more convex portions are provided on the sheet conveying downstream end surface of the pressing plate 3 and are loosely fitted with the convex portions at positions facing the convex portions of the guide plate surface of the lower guide 5. Even if the groove-shaped recess is provided, the same operation and effect are obtained.
[0042]
【The invention's effect】
  According to the present invention, there is provided a paper transporting device comprising: a paper mounting table for stacking and mounting a plurality of inclined sheets; a transporting roller for transporting the paper; and a plurality of paper mounted on the paper mounting table. Hold the leading edge of the sheet in the conveyance direction, and place the leading edge on the conveyance roller.PressingPossible holding plate,The uppermost sheet of the plurality of sheets conveyed by the conveyance rollerA separation plate to be discharged and conveyed, and a position of the pressing plate that is in contact with the conveyance roller, facing the inner side from both ends of the conveyance roller;An adhesion reducing means comprising rib-shaped convex portions formed with slopes in the upstream and downstream direction of paper conveyance;Since the pressing plate is provided with an urging means for urging the conveying roller.By creating an air layer between a plurality of sheets, weakening the adhesion and strengthening the sheets, a predetermined sheet can be reliably separated and transported. In addition, since the rib-like convex portion is provided with a slope on the downstream side of the sheet conveyance, it is possible to prevent the sheet from being bent sharply and to carry the sheet reliably.
[0043]
The paper conveying device of the present invention isA sheet mounting table for stacking and mounting a plurality of sheets disposed in an inclined manner, a transport roller for transporting the sheets, and a leading edge in the transport direction of the plurality of sheets mounted on the sheet mounting table A pressing plate capable of holding the portion and pressing the tip portion against the transport roller, a separation plate for discharging and transporting the uppermost sheet of the plurality of sheets transported by the transport roller, and the pressing plate A member separate from the pressing plate, which is disposed at a position in contact with the conveying roller, and is provided facing the inner side from both ends of the conveying roller, and is formed of a rib-shaped convex portion that forms a slope in the upstream and downstream directions of the sheet conveying. In this case, an air layer is formed between a plurality of sheets, the adhesion is weakened, and the sheet is stiff. By becoming And reliably separated constant of the paper can be conveyed. In addition, since the rib-like convex portion is provided with a slope on the downstream side of the sheet conveyance, it is possible to prevent the sheet from being bent sharply and to carry the sheet reliably. In addition, the friction coefficient of the paper is because the adhesion reducing means consisting of rib-shaped convex parts is composed of a separate member from the pressing plate. Therefore, it is possible to reliably carry the paper.
[Brief description of the drawings]
[Figure 1]Reference example 1FIG. 6 is a structural cross-sectional view showing the paper transport device in a state where the pressing plate stacks and places the paper.
[Figure 2]Reference example 1It is a perspective view which shows the pressing plate which added the notch part which is a recessed part by.
[Fig. 3]Reference example 1FIG. 6 is a structural cross-sectional view showing the paper transport device in a state where the pressing plate transports the paper.
[Fig. 4]Reference example 1FIG. 5 is a front view of the paper that is deformed into a wave shape by a notch that is a recess of the conveyance roller and the pressing plate.
[Figure 5]Reference example 2It is a perspective view which shows the pressing plate which added the concave-shaped aperture | diaphragm | squeeze part.
[Fig. 6]Reference example 2FIG. 6 is a front view in which the paper is deformed into a wave shape by the concave-shaped diaphragm portion of the conveying roller and the pressing plate.
[Fig. 7]Reference example 3It is a perspective view which shows the pressing plate which added the rib-shaped convex part by.
[Fig. 8]Reference example 3FIG. 6 is a front view in which the paper is deformed into a wave shape by the rib-shaped convex portions of the conveying roller and the pressing plate.
FIG. 9Reference example 4FIG. 6 is a perspective view showing a pressing plate to which a rib-like convex portion provided with a slope is added on the upstream side of paper conveyance.
FIG. 10 is a perspective view showing a pressing plate to which rib-like convex portions provided with slopes are added on both sides of the upstream and downstream sides of paper conveyance according to an embodiment of the present invention.
FIG. 11 is a diagram comparing the bending of the leading edge of a sheet when a slope is attached to the downstream side of a sheet conveyance of a rib-like convex portion added to a pressing plate and when the slope is not attached.
FIG. 12 is a perspective view showing a pressing plate to which round convex portions are added according to one embodiment of the present invention.
FIG. 13 is a perspective view showing that the convex plate is attached to the pressing plate according to the embodiment of the present invention.
FIG. 14 is a front view in which a sheet of paper is deformed in a wave shape by a convex portion of a convex plate attached to a conveyance roller and a pressing plate according to an embodiment of the present invention.
FIG. 15 is a perspective view showing that the lower guide is provided with a convex portion that loosely fits into the concave portion of the pressing plate according to the embodiment of the present invention.
FIG. 16 is a structural cross-sectional view showing the paper transport device in a state where the curled paper enters the gap between the pressing plate and the lower guide.
FIG. 17 is a structural cross-sectional view showing a paper transport device in which a curled sheet is not provided in a gap between the presser plate and the lower guide, and a concave part is provided on the presser plate and a convex part is provided on the lower guide.
FIG. 18 is a structural cross-sectional view showing a conventional paper conveying apparatus.
FIG. 19 is a structural cross-sectional view showing a paper conveying device disclosed in Japanese Utility Model Publication No. Hei 3-64953.
FIG. 20 is an explanatory diagram of a paper separating mechanism in the paper transport device disclosed in Japanese Utility Model Publication No. Hei 3-64953.
FIG. 21 is an explanatory view of a sheet separating mechanism in the sheet conveying apparatus shown in Japanese Utility Model Publication No. 3-64953, as in FIG. 20;
FIG. 22 is a diagram illustrating a sheet separating operation in the sheet conveying apparatus disclosed in Japanese Utility Model Publication No. 3-64953.
FIG. 23 is a view of the paper handling operation in the paper transport device shown in Japanese Utility Model Publication No. Hei 3-64953, similar to FIG. 22;
[Explanation of symbols]
              1. Paper
              2. Paper mounting table
              3. Holding plate
            3c. Notch that is a recess
            3d. Recessed diaphragm
            3e. Ribbed convex part
            3f. Rib-shaped convex part with slope on the upstream side of paper conveyance
            3g. Rib-shaped projections with slopes on both sides of the paper transport
            3h. Round convex
            3i. Recess
              5. Lower guide
            5a. Convex
              7). Transport roller
              8). Separator
            11. Convex plate

Claims (2)

A sheet mounting table for stacking and mounting a plurality of sheets disposed in an inclined manner, a transport roller for transporting the sheets, and a leading edge in the transport direction of the plurality of sheets mounted on the sheet mounting table A pressing plate capable of holding the portion and pressing the leading end portion against the conveying roller, a separation plate for discharging and conveying the uppermost sheet of the plurality of sheets conveyed by the conveying roller, and the pressing plate Adhering force relaxation means comprising rib-shaped convex portions that are provided on the inner side of both ends of the conveying roller at positions that contact the conveying roller and that form slopes in the upstream and downstream directions of paper conveyance , and the pressing plate A paper conveying device comprising an urging means for urging the roller. A sheet mounting table for stacking and mounting a plurality of sheets disposed in an inclined manner, a transport roller for transporting the sheets, and a leading edge in the transport direction of the plurality of sheets mounted on the sheet mounting table A pressing plate capable of holding the portion and pressing the leading end portion against the conveying roller, a separation plate for discharging and conveying the uppermost sheet of the plurality of sheets conveyed by the conveying roller, and the pressing plate A member separate from the pressing plate, which is disposed at a position in contact with the conveying roller, and is provided facing the inner side from both ends of the conveying roller, and is formed of a rib-shaped convex portion that forms a slope in the upstream and downstream directions of the sheet conveying. A sheet conveying apparatus comprising: an adhesion force alleviating unit; and an urging unit that urges the pressing plate against the conveying roller .

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