JP2004269070A - Attachment for paper feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attachment for a paper feeder capable of preventing a document from being caught in a paper feed port and a skew or the like from occurring by suppressing the jumping-up of the document in loading when the document with nonuniform thickness is loaded in the paper feeder. <P>SOLUTION: This attachment 1 for the paper feeder used for the paper feeder having a hopper plate 10 pressingly energized by a paper feed roller 14 from the underside comprises a plate-like base part 2 and a projected part 4 formed to be projected to the position of the upper surface of a base part 2 under the paper feed roller 14 in the state of the base part 2 installed on the upper surface of the hopper plate 10 positioned under the paper feed roller 14. Thus, a clearance can be provided between both ends of the document and the hopper plate 10 to suppress the jumping-up of the document in loading. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paper feeder attachment used for a paper feeder such as a printer, a scanner, and a fax machine, and more particularly, to a paper feed feeder used for feeding a document having a non-uniform document thickness with a print or the like. Related to attachments.
[0002]
[Prior art]
2. Description of the Related Art In a printer, a scanner, a facsimile, and the like, a paper feeder is used to load a document into a paper feed port when feeding a print sheet or a read document (hereinafter, collectively referred to as a "document"). Usually, the paper feed port is provided with a paper feed roller for inserting a document inside the paper feeder into the paper feed port. The feeder feeds not only a document but also a predetermined pressure to hold a bundle of a plurality of documents and feed the documents one by one without being double-fed from a paper feed port. (See, for example, Patent Document 1).
[0003]
By the way, the number of originals to be fed is usually large according to the standard (for example, A4 size of the JIS standard). Therefore, the paper feeding hopper is made in accordance with the size determined by the standard. ing. However, the sizes and types of the originals are actually various, and it is difficult to load all types of originals into the paper feed opening in an optimal state with a standard size paper feed hopper. In such a case, a paper feeder attachment is used.
[0004]
2. Description of the Related Art As a conventional paper feed feeder attachment, there is known one in which an attachment having a small hopper plate according to the size of a document is attached inside the paper feed feeder (for example, see Patent Documents 2 to 5).
[0005]
There is also known a sheet feeder which is not an attachment for a sheet feeder but is provided with a sheet guide which can be slid to change the width on the hopper plate itself (for example, see Patent Document 6).
[0006]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-95357 [Patent Document 2]
JP-A-62-205931 (Page 4, FIG. 1, FIG. 2)
[Patent Document 3]
Japanese Utility Model Publication No. 2-18024 (Page 6, Figure 1, Page 8, Figure 3)
[Patent Document 4]
Japanese Utility Model Laid-Open No. 1-70740 (Page 1, FIG. 2)
[Patent Document 5]
Japanese Utility Model Laid-Open No. 1-70737 (page 2, FIG. 1)
[Patent Document 6]
Japanese Patent Application Laid-Open No. 10-291695 (page 3, FIG. 2)
[0007]
[Problems to be solved by the invention]
By using the above-mentioned conventional paper feed feeder and paper feed feeder attachment, it is possible to load various sizes of originals such as sealing and postcards in the paper feed feeder in an optimal state.
[0008]
However, when a document having a non-uniform document thickness, such as a check with a stamp, is fed, the skew (skew) of the document at the time of feeding may be obtained even if the above-mentioned conventional paper feeder attachment is used. There is a case where the sheet cannot be fed properly due to the occurrence of inclination caused by the deviation).
[0009]
FIG. 5 is a perspective view showing a state in which a document having a non-uniform document thickness with a stamp attached to a conventional paper feeder is loaded, and FIG. 6 is a view of the document loaded state in FIG. 5 viewed from the front side of a paper feed port. is there.
[0010]
5 and 6, a paper feeder 100 is installed in a paper feed port 101 of a printer, a scanner, a facsimile or the like. Above the entrance of the paper feed port 101, a paper feed roller 102 for transporting the original on the paper feed feeder 100 into the paper feed port 101 is provided. The paper feeder 100 includes a hopper plate 103 on which an original is placed. The hopper plate 103 is urged by a spring (not shown) from below, and is pressed below the paper feed roller 102. It is in the state where it was done.
[0011]
In the conventional paper feeder 100 configured as described above, when an original 104 having a non-uniform height of stacked originals, such as a check on which a stamp 104a is attached, is loaded, a state as shown in FIGS. The original is held between the hopper plate 103 and the paper feed roller 102 by the elasticity of the spring. However, normally, the pressing force of the spring on the hopper plate 103 is adjusted to an optimum pressure that does not allow the normal paper (A4 size paper or the like) to be multi-fed. On the other hand, the original 104 to which the stamp or the like is attached has a non-uniform document thickness, so that the left end or the right end (the side to which the stamp or the like is attached) of the original 104 is flipped upward as shown in FIG. Will be loaded.
[0012]
As described above, when an attempt is made to feed the loaded document 104 in a state where the left end or the right end is jumped up, one end of the document 104 is caught or contacted with one side of the paper feed port 101 to cause friction. As a result, a skew or the like occurs, and problems such as a printing shift and a reading shift occur.
[0013]
Therefore, an object of the present invention is to prevent a document from having a non-uniform thickness such as a check with a stamp attached to a paper feeder and to prevent the document from jumping at the time of loading the document and to catch the document in a paper feed port. An object of the present invention is to provide an attachment for a feeder that can prevent occurrence of skew and the like.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an attachment for a feeder according to the present invention is an attachment for a feeder used for a feeder provided with a hopper plate that is urged from below by a feed roller, A projection formed so as to project to a position below the paper feed roller on the upper surface of the base portion in a state where the base portion is attached to the upper surface of the plate-shaped base portion and the hopper plate located below the paper feed roller. And a unit.
[0015]
With this configuration, when loading an original with a non-uniform thickness such as a check with a stamp attached to the paper feeder, skew is prevented when the original is loaded and the original is caught in the paper feed port. Can be prevented.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
A sheet feeder attachment according to claim 1 of the present invention is a sheet feeder attachment used for a sheet feeder provided with a hopper plate that is urged from below by a sheet feed roller, and is a plate-shaped attachment. A base portion, and a projection formed to protrude to a position below the paper feed roller on the upper surface of the base portion in a state where the base portion is attached to an upper surface of a hopper plate located below the paper feed roller; It is characterized by having.
[0017]
When feeding a document bundle with a non-uniform document thickness, such as a check stamp, etc., use the paper feed feeder attachment of the present invention by attaching it to the upper surface of the paper feeder and using the central part of the document bundle. Is fed between the protrusions and the feed roller. Thus, a gap is formed between the left and right ends of the document bundle and the hopper plate. For this reason, the amount by which the left and right ends of the document bundle jump up is suppressed, and the left and right ends of the document bundle spread toward this gap. Then, the uppermost document is fed in a substantially flat state. Therefore, even when a document having a non-uniform document thickness is fed, it is possible to prevent the document from being caught in the paper feed port and causing skew or the like.
[0018]
Here, the projection and the base may be integrally formed. With the integral formation, man-hours at the time of manufacturing can be reduced, so that manufacturing is easy and manufacturing cost can be reduced.
[0019]
Further, the sheet feeder attachment can be formed of metal. Forming with metal facilitates processing during manufacturing. Further, it can be used as a weight for adjusting the pressing force of the hopper plate. In particular, when feeding thin paper, it is necessary to reduce the pressing force of the hopper plate in order to prevent double feeding of paper. In such a case, it is possible to prepare a separate weight for load adjustment and adjust the load by placing the weight on the hopper plate.However, by forming the paper feeder attachment with metal, Can also be used as a weight. Therefore, it is not necessary to separately prepare a weight for adjusting the load, and the convenience is improved.
[0020]
According to a second aspect of the present invention, in the attachment for the paper feeder according to the first aspect, the protrusion has a flat portion pressed from below by the paper feed roller by the paper feed feeder. Is formed at a position sandwiched between the hopper plate and the paper feed roller.
[0021]
As described above, since the flat portion is provided on the protrusion, the uppermost portion of the document becomes substantially flat by sandwiching the document bundle having an uneven thickness between the sheet feeding roller and the flat portion of the protrusion. . Thus, it is possible to prevent the document from being inclined when reading a document having an uneven document thickness.
[0022]
According to a third aspect of the present invention, in the paper feeder attachment according to the second aspect, the protrusion is provided in a state in which the base is mounted on an upper surface of a hopper plate located below the paper feed roller. An inclined portion formed to incline upward toward the base portion, the flat portion is connected to an upper end of the inclined portion, and the flat portion is formed so as to be parallel to an upper surface of the base portion. It is characterized by that.
[0023]
In this way, by providing the inclined portion on the projection, the document can be inserted while sliding the upper surface of the inclined portion when the document bundle is set between the paper feeding roller and the projection before the sheet feeding is started. Can be. As described above, when the document is inserted toward the flat surface while sliding on the inclined portion, and the document hits the paper feed roller, the document is gradually pushed down on the hopper plate while sliding on the upper surface of the inclined portion, so that the document is moved between the paper feed roller and the inclined portion. Thus, the original bundle can be smoothly interposed between the flat portion and the paper feed roller.
[0024]
According to a fourth aspect of the present invention, in the paper feeder attachment according to the first, second or third aspect, the paper feeding direction is set in a state where the base portion is attached to an upper surface of a hopper plate located below the paper feeding roller. The two claw portions are formed on the upper surface of the base portion at positions substantially on the left and right sides of the protrusion at substantially the same height as the height of the protrusion, and are formed to incline upward in the sheet feeding direction. It is characterized by having.
[0025]
When the center of a document stack with uneven thickness is suppressed by the feed rollers and protrusions, the top of the document is almost flat, but the edges of the lower document are not supported, so the weight of the document itself and the May be deflected downward due to the difference in thickness. At this time, if there is a step between the upper surface of the hopper plate and the lower part of the entrance of the paper feed port, the end of the document may be caught by the step of the lower part of the entrance of the paper feed port. Thus, by providing the above-mentioned claw portion, both ends of the document are pushed up by the claw portion, the bending of both ends of the document is reduced, and it is possible to prevent the document from being caught by the step at the lower portion of the entrance of the sheet feeding port.
[0026]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0027]
FIG. 1 is a perspective view of a sheet feeder attachment according to an embodiment of the present invention.
[0028]
In FIG. 1, a sheet feeder attachment 1 according to the present embodiment is formed by pressing a metal plate, and a plate-like base portion 2 forming a frame of the sheet feeder attachment 2 is substantially T-symmetrical in plan view. It has a shape. Hereinafter, the side where the width of the T-shaped base portion 2 is widened is called a front end side, and the opposite side is called a rear end side.
[0029]
The central portion 2a of the base portion 2 is formed in a substantially rectangular shape, and substantially right-angled triangular wing portions 2b, 2b protrude from both sides on the front end side. Two openings 2c, 2c are formed in the central portion 2a of the base portion 2 at left-right symmetric positions. Locking claws 3 are formed on the inner peripheral edge of each of the openings 2c, 2c on the rear surface side of the base 2. The locking claws 3, 3 are engaged with locking holes 11, 11 formed on the upper surface of the hopper plate 10 of the paper feeder, and fix the paper feeder attachment 1 at a predetermined position on the hopper plate 10. .
[0030]
On the front end side of the central portion 2a of the base portion 2, a projection 4 projecting toward the upper surface of the base portion 2 is formed. The protruding portion 4 is formed on its base end side with an inclined portion 4a which is connected to the base portion 2 and is inclined upward toward the front end side. On the front end side, it is connected to the upper end of the inclined portion 4a, A flat portion 4b whose upper surface is parallel to the upper surface of the base portion 2 is formed.
[0031]
At the left and right ends of the wings 2 b, 2 b of the base 2, claw portions 5, 5 protruding toward the upper surface of the base 2 are formed. The tips of the claws 5, 5 are formed at substantially the same height as the height of the projection 4, and are formed to be inclined upward toward the front end side.
[0032]
FIG. 2 is a side sectional view showing a state in which the paper feeder attachment according to the embodiment of the present invention is mounted on the paper feeder. In the present embodiment, as an example, a description will be given assuming that the paper feeder attachment is mounted on the paper feeder of the scanner.
[0033]
In FIG. 2, a space formed between transport paths 12 arranged above and below the scanner main body is a paper feed port 13 for feeding a document into the scanner main body. The entrance of the paper feed port 13 of the transport path 12 is expanded vertically. At the entrance of the paper feed port 13, a paper feed feeder 9 for holding a document to be fed is attached. A paper feed roller 14 for carrying a document into the paper feed port 13 is provided above the transport path 12. The hopper plate 10 of the paper feeder 9 is disposed below the paper feed port 13, and its front end is located below the paper feed roller 14. The hopper plate 10 is urged in the direction of the paper feed roller 14 by a spring (not shown).
[0034]
The attachment 1 for the feeder feeder is fixed to the upper surface of the hopper plate 10 with the engagement claws 3 and 3 engaged with the engagement openings 11 and 11. At this time, the front end side of the paper feed feeder attachment 1 is mounted in the scanner body so as to face the paper feed port 13 for feeding a document. At this time, the height of the upper surface of the flat portion 4 b of the projection 4 and the height of the tip portions of the claws 5 and 5 are substantially the same as the height of the paper feed port 13.
[0035]
The operation of the paper feeder attachment according to the present embodiment configured as described above will be described below.
[0036]
FIG. 3 is a perspective view showing a state in which an original having a non-uniform thickness with a stamp is attached to a paper feeder to which the paper feeder attachment according to the embodiment of the present invention is attached, and FIG. FIG. 3 is a diagram illustrating a loaded state as viewed from the front side of a sheet feeding port.
[0037]
3 and 4, a bundle of originals 20 having uneven thicknesses, such as a check or the like, to which a stamp 20 a is attached, has a central portion formed on the upper surface of the projection 4 of the attachment 1 for the paper feeder 1 and the paper feed roller 14. Is loaded so as to be located between. At this time, the bundle of the originals 20 is held between the projection 4 of the paper feeder attachment 1 and the paper feed roller 14 by the elasticity of the spring. At this time, the left and right sides of the bundle of originals 20 slightly float above the hopper plate 10, and a gap is formed between the left and right sides of the bundle of originals 20 and the hopper plate 10. Therefore, as shown in FIG. 4, when the bundle of the originals 20 is sandwiched between the protrusion 4 and the feed roller 14, the right and left ends of the original 20 are prevented from jumping up and down, and Both sides extend to this gap side. Then, the uppermost document 20 sandwiched between the protrusion 4 and the paper feed roller 14 is fed in a substantially flat state. Therefore, even when the document 20 having a non-uniform document thickness is fed, the skew or the like caused by the document 20 being caught in the sheet feeding port 13 is prevented.
[0038]
Further, the right and left sides of the document 20 are lifted up to substantially the same height as the paper feed port 13 by the claw portions 5 and 5 on both sides of the paper feed feeder attachment 1. Therefore, it is possible to prevent the skew or the like from occurring when the left and right sides of the document 20 are caught below the sheet feeding port 13 during sheet feeding.
[0039]
In addition, since the attachment 1 for paper feeder of this embodiment is made of metal, it can be used instead of a weight.
[0040]
For example, when feeding a thin document, the pressing force of the hopper plate 10 needs to be weaker than usual in order to prevent double feeding of the document. In such a case, if the sheet feeder attachment 1 is attached to the hopper plate 10, the pressing force of the hopper plate 10 is reduced by the weight of the sheet feeder attachment 1. In this state, if a thin original is loaded and fed, double feeding of the original is prevented.
[0041]
【The invention's effect】
As described above, according to the feeder attachment according to the first aspect of the present invention, a document bundle with a non-uniform document thickness, such as a check or a stamp, is attached to the upper surface of the feeder for use. When paper is fed, it is possible to prevent a skew or the like from occurring due to the document being caught in the paper feed port.
[0042]
According to the second aspect of the present invention, since the flat portion is provided on the projection, it is possible to prevent the document from being tilted when reading a document having a non-uniform document thickness.
[0043]
According to the third aspect of the present invention, the document bundle is set smoothly by sandwiching the document bundle between the flat portion and the paper feed roller while sliding on the inclined portion before starting the paper supply. Can be. Therefore, it is easy to set the document bundle before the start of sheet feeding.
[0044]
According to the fourth aspect of the present invention, the bending at both ends of the document is suppressed by the claw portions on both sides of the projecting portion, and the both ends of the document are prevented from being caught on the lower portion of the entrance of the paper feeding port. For this reason, it is possible to prevent a skew or the like from occurring due to the document being caught on the lower portion of the entrance of the paper feed port.
[Brief description of the drawings]
FIG. 1 is a perspective view of a sheet feeder attachment according to an embodiment of the present invention. FIG. 2 is a side sectional view showing a state in which the sheet feeder attachment according to the embodiment of the present invention is mounted on the sheet feeder. FIG. 3 is a perspective view showing a state in which a document having a non-uniform document thickness with a stamp is attached to a paper feeder provided with a paper feeder attachment according to the embodiment of the present invention; FIG. 5 is a perspective view showing a state in which a document is loaded from the front side of a paper feed port. FIG. 5 is a perspective view showing a state in which a document having a non-uniform thickness with a stamp attached to a conventional paper feeder is loaded. View of loaded state of document from front side of paper feed slot [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Attachment for paper feeder 2 Base part 2a Central part 2b Wing part 2c Opening part 3 Locking claw 4 Projection part 4a Inclined part 4b Flat part 5 Claw part 9 Paper feeder 10 Hopper plate 11 Locking opening 12 Transport path 13 Feeding Paper exit 14 Paper feed roller

Claims (4)

An attachment for a paper feed feeder used for a paper feed feeder having a hopper plate pressed and urged from below by a paper feed roller,
A plate-like base,
A projection formed so as to project to a position below the paper feed roller on the upper surface of the base in a state where the base is attached to the upper surface of the hopper plate located below the paper feed roller; ,
An attachment for a paper feeder, comprising: The protrusion has a flat portion that is pressed and urged from below by the feed roller by the feed feeder, and the flat portion is formed at a position sandwiched between the hopper plate and the feed roller. The sheet feeder attachment according to claim 1, wherein The projection has an inclined portion formed so as to be inclined upward in the sheet feeding direction when the base is attached to the upper surface of the hopper plate located below the sheet feeding roller. 3. The sheet feeder attachment according to claim 2, wherein the flat portion is connected to an upper end of the inclined portion, and the flat portion is formed so as to be parallel to an upper surface of the base portion. In a state where the base portion is mounted on the upper surface of the hopper plate located below the paper feed roller, the height is substantially the same as the height of the protrusion at a position on the left and right sides of the protrusion with respect to the paper feeding direction. 4. The feeding device according to claim 1, further comprising two claw portions projecting from an upper surface of the base portion at a height and inclined upward in a sheet feeding direction. Attachment for paper feeder.

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